Commit | Line | Data |
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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 | 80 | |
8b671b80 BF |
81 | /* Locking: */ |
82 | ||
83 | /* Currently used for almost all code touching nfsv4 state: */ | |
353ab6e9 | 84 | static DEFINE_MUTEX(client_mutex); |
1da177e4 | 85 | |
8b671b80 BF |
86 | /* |
87 | * Currently used for the del_recall_lru and file hash table. In an | |
88 | * effort to decrease the scope of the client_mutex, this spinlock may | |
89 | * eventually cover more: | |
90 | */ | |
91 | static DEFINE_SPINLOCK(recall_lock); | |
92 | ||
e18b890b CL |
93 | static struct kmem_cache *stateowner_slab = NULL; |
94 | static struct kmem_cache *file_slab = NULL; | |
95 | static struct kmem_cache *stateid_slab = NULL; | |
96 | static struct kmem_cache *deleg_slab = NULL; | |
e60d4398 | 97 | |
1da177e4 LT |
98 | void |
99 | nfs4_lock_state(void) | |
100 | { | |
353ab6e9 | 101 | mutex_lock(&client_mutex); |
1da177e4 LT |
102 | } |
103 | ||
104 | void | |
105 | nfs4_unlock_state(void) | |
106 | { | |
353ab6e9 | 107 | mutex_unlock(&client_mutex); |
1da177e4 LT |
108 | } |
109 | ||
110 | static inline u32 | |
111 | opaque_hashval(const void *ptr, int nbytes) | |
112 | { | |
113 | unsigned char *cptr = (unsigned char *) ptr; | |
114 | ||
115 | u32 x = 0; | |
116 | while (nbytes--) { | |
117 | x *= 37; | |
118 | x += *cptr++; | |
119 | } | |
120 | return x; | |
121 | } | |
122 | ||
1da177e4 LT |
123 | static struct list_head del_recall_lru; |
124 | ||
13cd2184 N |
125 | static inline void |
126 | put_nfs4_file(struct nfs4_file *fi) | |
127 | { | |
8b671b80 BF |
128 | if (atomic_dec_and_lock(&fi->fi_ref, &recall_lock)) { |
129 | list_del(&fi->fi_hash); | |
130 | spin_unlock(&recall_lock); | |
131 | iput(fi->fi_inode); | |
132 | kmem_cache_free(file_slab, fi); | |
133 | } | |
13cd2184 N |
134 | } |
135 | ||
136 | static inline void | |
137 | get_nfs4_file(struct nfs4_file *fi) | |
138 | { | |
8b671b80 | 139 | atomic_inc(&fi->fi_ref); |
13cd2184 N |
140 | } |
141 | ||
ef0f3390 | 142 | static int num_delegations; |
c2f1a551 | 143 | unsigned int max_delegations; |
ef0f3390 N |
144 | |
145 | /* | |
146 | * Open owner state (share locks) | |
147 | */ | |
148 | ||
149 | /* hash tables for nfs4_stateowner */ | |
150 | #define OWNER_HASH_BITS 8 | |
151 | #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) | |
152 | #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) | |
153 | ||
154 | #define ownerid_hashval(id) \ | |
155 | ((id) & OWNER_HASH_MASK) | |
156 | #define ownerstr_hashval(clientid, ownername) \ | |
157 | (((clientid) + opaque_hashval((ownername.data), (ownername.len))) & OWNER_HASH_MASK) | |
158 | ||
159 | static struct list_head ownerid_hashtbl[OWNER_HASH_SIZE]; | |
160 | static struct list_head ownerstr_hashtbl[OWNER_HASH_SIZE]; | |
161 | ||
162 | /* hash table for nfs4_file */ | |
163 | #define FILE_HASH_BITS 8 | |
164 | #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) | |
165 | #define FILE_HASH_MASK (FILE_HASH_SIZE - 1) | |
166 | /* hash table for (open)nfs4_stateid */ | |
167 | #define STATEID_HASH_BITS 10 | |
168 | #define STATEID_HASH_SIZE (1 << STATEID_HASH_BITS) | |
169 | #define STATEID_HASH_MASK (STATEID_HASH_SIZE - 1) | |
170 | ||
171 | #define file_hashval(x) \ | |
172 | hash_ptr(x, FILE_HASH_BITS) | |
173 | #define stateid_hashval(owner_id, file_id) \ | |
174 | (((owner_id) + (file_id)) & STATEID_HASH_MASK) | |
175 | ||
176 | static struct list_head file_hashtbl[FILE_HASH_SIZE]; | |
177 | static struct list_head stateid_hashtbl[STATEID_HASH_SIZE]; | |
178 | ||
1da177e4 LT |
179 | static struct nfs4_delegation * |
180 | alloc_init_deleg(struct nfs4_client *clp, struct nfs4_stateid *stp, struct svc_fh *current_fh, u32 type) | |
181 | { | |
182 | struct nfs4_delegation *dp; | |
183 | struct nfs4_file *fp = stp->st_file; | |
184 | struct nfs4_callback *cb = &stp->st_stateowner->so_client->cl_callback; | |
185 | ||
186 | dprintk("NFSD alloc_init_deleg\n"); | |
47f9940c MS |
187 | if (fp->fi_had_conflict) |
188 | return NULL; | |
c2f1a551 | 189 | if (num_delegations > max_delegations) |
ef0f3390 | 190 | return NULL; |
5b2d21c1 N |
191 | dp = kmem_cache_alloc(deleg_slab, GFP_KERNEL); |
192 | if (dp == NULL) | |
1da177e4 | 193 | return dp; |
ef0f3390 | 194 | num_delegations++; |
ea1da636 N |
195 | INIT_LIST_HEAD(&dp->dl_perfile); |
196 | INIT_LIST_HEAD(&dp->dl_perclnt); | |
1da177e4 LT |
197 | INIT_LIST_HEAD(&dp->dl_recall_lru); |
198 | dp->dl_client = clp; | |
13cd2184 | 199 | get_nfs4_file(fp); |
1da177e4 LT |
200 | dp->dl_file = fp; |
201 | dp->dl_flock = NULL; | |
202 | get_file(stp->st_vfs_file); | |
203 | dp->dl_vfs_file = stp->st_vfs_file; | |
204 | dp->dl_type = type; | |
205 | dp->dl_recall.cbr_dp = NULL; | |
206 | dp->dl_recall.cbr_ident = cb->cb_ident; | |
207 | dp->dl_recall.cbr_trunc = 0; | |
208 | dp->dl_stateid.si_boot = boot_time; | |
209 | dp->dl_stateid.si_stateownerid = current_delegid++; | |
210 | dp->dl_stateid.si_fileid = 0; | |
211 | dp->dl_stateid.si_generation = 0; | |
6c02eaa1 | 212 | fh_copy_shallow(&dp->dl_fh, ¤t_fh->fh_handle); |
1da177e4 LT |
213 | dp->dl_time = 0; |
214 | atomic_set(&dp->dl_count, 1); | |
ea1da636 N |
215 | list_add(&dp->dl_perfile, &fp->fi_delegations); |
216 | list_add(&dp->dl_perclnt, &clp->cl_delegations); | |
1da177e4 LT |
217 | return dp; |
218 | } | |
219 | ||
220 | void | |
221 | nfs4_put_delegation(struct nfs4_delegation *dp) | |
222 | { | |
223 | if (atomic_dec_and_test(&dp->dl_count)) { | |
224 | dprintk("NFSD: freeing dp %p\n",dp); | |
13cd2184 | 225 | put_nfs4_file(dp->dl_file); |
5b2d21c1 | 226 | kmem_cache_free(deleg_slab, dp); |
ef0f3390 | 227 | num_delegations--; |
1da177e4 LT |
228 | } |
229 | } | |
230 | ||
231 | /* Remove the associated file_lock first, then remove the delegation. | |
232 | * lease_modify() is called to remove the FS_LEASE file_lock from | |
233 | * the i_flock list, eventually calling nfsd's lock_manager | |
234 | * fl_release_callback. | |
235 | */ | |
236 | static void | |
237 | nfs4_close_delegation(struct nfs4_delegation *dp) | |
238 | { | |
239 | struct file *filp = dp->dl_vfs_file; | |
240 | ||
241 | dprintk("NFSD: close_delegation dp %p\n",dp); | |
242 | dp->dl_vfs_file = NULL; | |
243 | /* The following nfsd_close may not actually close the file, | |
244 | * but we want to remove the lease in any case. */ | |
c907132d | 245 | if (dp->dl_flock) |
a9933cea | 246 | vfs_setlease(filp, F_UNLCK, &dp->dl_flock); |
1da177e4 | 247 | nfsd_close(filp); |
1da177e4 LT |
248 | } |
249 | ||
250 | /* Called under the state lock. */ | |
251 | static void | |
252 | unhash_delegation(struct nfs4_delegation *dp) | |
253 | { | |
ea1da636 N |
254 | list_del_init(&dp->dl_perfile); |
255 | list_del_init(&dp->dl_perclnt); | |
1da177e4 LT |
256 | spin_lock(&recall_lock); |
257 | list_del_init(&dp->dl_recall_lru); | |
258 | spin_unlock(&recall_lock); | |
259 | nfs4_close_delegation(dp); | |
260 | nfs4_put_delegation(dp); | |
261 | } | |
262 | ||
263 | /* | |
264 | * SETCLIENTID state | |
265 | */ | |
266 | ||
267 | /* Hash tables for nfs4_clientid state */ | |
268 | #define CLIENT_HASH_BITS 4 | |
269 | #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS) | |
270 | #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1) | |
271 | ||
272 | #define clientid_hashval(id) \ | |
273 | ((id) & CLIENT_HASH_MASK) | |
a55370a3 N |
274 | #define clientstr_hashval(name) \ |
275 | (opaque_hashval((name), 8) & CLIENT_HASH_MASK) | |
1da177e4 LT |
276 | /* |
277 | * reclaim_str_hashtbl[] holds known client info from previous reset/reboot | |
278 | * used in reboot/reset lease grace period processing | |
279 | * | |
280 | * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed | |
281 | * setclientid_confirmed info. | |
282 | * | |
283 | * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed | |
284 | * setclientid info. | |
285 | * | |
286 | * client_lru holds client queue ordered by nfs4_client.cl_time | |
287 | * for lease renewal. | |
288 | * | |
289 | * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time | |
290 | * for last close replay. | |
291 | */ | |
292 | static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE]; | |
293 | static int reclaim_str_hashtbl_size = 0; | |
294 | static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE]; | |
295 | static struct list_head conf_str_hashtbl[CLIENT_HASH_SIZE]; | |
296 | static struct list_head unconf_str_hashtbl[CLIENT_HASH_SIZE]; | |
297 | static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE]; | |
298 | static struct list_head client_lru; | |
299 | static struct list_head close_lru; | |
300 | ||
2283963f BF |
301 | static void unhash_generic_stateid(struct nfs4_stateid *stp) |
302 | { | |
303 | list_del(&stp->st_hash); | |
304 | list_del(&stp->st_perfile); | |
305 | list_del(&stp->st_perstateowner); | |
306 | } | |
307 | ||
308 | static void free_generic_stateid(struct nfs4_stateid *stp) | |
309 | { | |
310 | put_nfs4_file(stp->st_file); | |
311 | kmem_cache_free(stateid_slab, stp); | |
312 | } | |
313 | ||
314 | static void release_lock_stateid(struct nfs4_stateid *stp) | |
315 | { | |
316 | unhash_generic_stateid(stp); | |
317 | locks_remove_posix(stp->st_vfs_file, (fl_owner_t)stp->st_stateowner); | |
318 | free_generic_stateid(stp); | |
319 | } | |
320 | ||
f044ff83 BF |
321 | static void unhash_lockowner(struct nfs4_stateowner *sop) |
322 | { | |
323 | struct nfs4_stateid *stp; | |
324 | ||
325 | list_del(&sop->so_idhash); | |
326 | list_del(&sop->so_strhash); | |
327 | list_del(&sop->so_perstateid); | |
328 | while (!list_empty(&sop->so_stateids)) { | |
329 | stp = list_first_entry(&sop->so_stateids, | |
330 | struct nfs4_stateid, st_perstateowner); | |
331 | release_lock_stateid(stp); | |
332 | } | |
333 | } | |
334 | ||
335 | static void release_lockowner(struct nfs4_stateowner *sop) | |
336 | { | |
337 | unhash_lockowner(sop); | |
338 | nfs4_put_stateowner(sop); | |
339 | } | |
340 | ||
f1d110ca BF |
341 | static void |
342 | release_stateid_lockowners(struct nfs4_stateid *open_stp) | |
343 | { | |
344 | struct nfs4_stateowner *lock_sop; | |
345 | ||
346 | while (!list_empty(&open_stp->st_lockowners)) { | |
347 | lock_sop = list_entry(open_stp->st_lockowners.next, | |
348 | struct nfs4_stateowner, so_perstateid); | |
349 | /* list_del(&open_stp->st_lockowners); */ | |
350 | BUG_ON(lock_sop->so_is_open_owner); | |
f044ff83 | 351 | release_lockowner(lock_sop); |
f1d110ca BF |
352 | } |
353 | } | |
354 | ||
2283963f BF |
355 | static void release_open_stateid(struct nfs4_stateid *stp) |
356 | { | |
357 | unhash_generic_stateid(stp); | |
358 | release_stateid_lockowners(stp); | |
359 | nfsd_close(stp->st_vfs_file); | |
360 | free_generic_stateid(stp); | |
361 | } | |
362 | ||
f044ff83 | 363 | static void unhash_openowner(struct nfs4_stateowner *sop) |
f1d110ca BF |
364 | { |
365 | struct nfs4_stateid *stp; | |
366 | ||
367 | list_del(&sop->so_idhash); | |
368 | list_del(&sop->so_strhash); | |
f044ff83 BF |
369 | list_del(&sop->so_perclient); |
370 | list_del(&sop->so_perstateid); /* XXX: necessary? */ | |
f1d110ca | 371 | while (!list_empty(&sop->so_stateids)) { |
f044ff83 BF |
372 | stp = list_first_entry(&sop->so_stateids, |
373 | struct nfs4_stateid, st_perstateowner); | |
374 | release_open_stateid(stp); | |
f1d110ca BF |
375 | } |
376 | } | |
377 | ||
f044ff83 | 378 | static void release_openowner(struct nfs4_stateowner *sop) |
f1d110ca | 379 | { |
f044ff83 | 380 | unhash_openowner(sop); |
f1d110ca BF |
381 | list_del(&sop->so_close_lru); |
382 | nfs4_put_stateowner(sop); | |
383 | } | |
384 | ||
1da177e4 LT |
385 | static inline void |
386 | renew_client(struct nfs4_client *clp) | |
387 | { | |
388 | /* | |
389 | * Move client to the end to the LRU list. | |
390 | */ | |
391 | dprintk("renewing client (clientid %08x/%08x)\n", | |
392 | clp->cl_clientid.cl_boot, | |
393 | clp->cl_clientid.cl_id); | |
394 | list_move_tail(&clp->cl_lru, &client_lru); | |
395 | clp->cl_time = get_seconds(); | |
396 | } | |
397 | ||
398 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ | |
399 | static int | |
400 | STALE_CLIENTID(clientid_t *clid) | |
401 | { | |
402 | if (clid->cl_boot == boot_time) | |
403 | return 0; | |
404 | dprintk("NFSD stale clientid (%08x/%08x)\n", | |
405 | clid->cl_boot, clid->cl_id); | |
406 | return 1; | |
407 | } | |
408 | ||
409 | /* | |
410 | * XXX Should we use a slab cache ? | |
411 | * This type of memory management is somewhat inefficient, but we use it | |
412 | * anyway since SETCLIENTID is not a common operation. | |
413 | */ | |
35bba9a3 | 414 | static struct nfs4_client *alloc_client(struct xdr_netobj name) |
1da177e4 LT |
415 | { |
416 | struct nfs4_client *clp; | |
417 | ||
35bba9a3 BF |
418 | clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); |
419 | if (clp == NULL) | |
420 | return NULL; | |
421 | clp->cl_name.data = kmalloc(name.len, GFP_KERNEL); | |
422 | if (clp->cl_name.data == NULL) { | |
423 | kfree(clp); | |
424 | return NULL; | |
1da177e4 | 425 | } |
35bba9a3 BF |
426 | memcpy(clp->cl_name.data, name.data, name.len); |
427 | clp->cl_name.len = name.len; | |
1da177e4 LT |
428 | return clp; |
429 | } | |
430 | ||
1b1a9b31 BF |
431 | static void |
432 | shutdown_callback_client(struct nfs4_client *clp) | |
433 | { | |
434 | struct rpc_clnt *clnt = clp->cl_callback.cb_client; | |
435 | ||
1b1a9b31 | 436 | if (clnt) { |
404ec117 BF |
437 | /* |
438 | * Callback threads take a reference on the client, so there | |
439 | * should be no outstanding callbacks at this point. | |
440 | */ | |
1b1a9b31 BF |
441 | clp->cl_callback.cb_client = NULL; |
442 | rpc_shutdown_client(clnt); | |
443 | } | |
444 | } | |
445 | ||
1da177e4 LT |
446 | static inline void |
447 | free_client(struct nfs4_client *clp) | |
448 | { | |
1b1a9b31 | 449 | shutdown_callback_client(clp); |
1da177e4 LT |
450 | if (clp->cl_cred.cr_group_info) |
451 | put_group_info(clp->cl_cred.cr_group_info); | |
68e76ad0 | 452 | kfree(clp->cl_principal); |
1da177e4 LT |
453 | kfree(clp->cl_name.data); |
454 | kfree(clp); | |
455 | } | |
456 | ||
457 | void | |
458 | put_nfs4_client(struct nfs4_client *clp) | |
459 | { | |
460 | if (atomic_dec_and_test(&clp->cl_count)) | |
461 | free_client(clp); | |
462 | } | |
463 | ||
464 | static void | |
465 | expire_client(struct nfs4_client *clp) | |
466 | { | |
467 | struct nfs4_stateowner *sop; | |
468 | struct nfs4_delegation *dp; | |
1da177e4 LT |
469 | struct list_head reaplist; |
470 | ||
471 | dprintk("NFSD: expire_client cl_count %d\n", | |
472 | atomic_read(&clp->cl_count)); | |
473 | ||
1da177e4 LT |
474 | INIT_LIST_HEAD(&reaplist); |
475 | spin_lock(&recall_lock); | |
ea1da636 N |
476 | while (!list_empty(&clp->cl_delegations)) { |
477 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); | |
1da177e4 LT |
478 | dprintk("NFSD: expire client. dp %p, fp %p\n", dp, |
479 | dp->dl_flock); | |
ea1da636 | 480 | list_del_init(&dp->dl_perclnt); |
1da177e4 LT |
481 | list_move(&dp->dl_recall_lru, &reaplist); |
482 | } | |
483 | spin_unlock(&recall_lock); | |
484 | while (!list_empty(&reaplist)) { | |
485 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
486 | list_del_init(&dp->dl_recall_lru); | |
487 | unhash_delegation(dp); | |
488 | } | |
489 | list_del(&clp->cl_idhash); | |
490 | list_del(&clp->cl_strhash); | |
491 | list_del(&clp->cl_lru); | |
ea1da636 N |
492 | while (!list_empty(&clp->cl_openowners)) { |
493 | sop = list_entry(clp->cl_openowners.next, struct nfs4_stateowner, so_perclient); | |
f044ff83 | 494 | release_openowner(sop); |
1da177e4 LT |
495 | } |
496 | put_nfs4_client(clp); | |
497 | } | |
498 | ||
35bba9a3 BF |
499 | static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir) |
500 | { | |
1da177e4 LT |
501 | struct nfs4_client *clp; |
502 | ||
35bba9a3 BF |
503 | clp = alloc_client(name); |
504 | if (clp == NULL) | |
505 | return NULL; | |
a55370a3 | 506 | memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); |
1da177e4 LT |
507 | atomic_set(&clp->cl_count, 1); |
508 | atomic_set(&clp->cl_callback.cb_set, 0); | |
1da177e4 LT |
509 | INIT_LIST_HEAD(&clp->cl_idhash); |
510 | INIT_LIST_HEAD(&clp->cl_strhash); | |
ea1da636 N |
511 | INIT_LIST_HEAD(&clp->cl_openowners); |
512 | INIT_LIST_HEAD(&clp->cl_delegations); | |
1da177e4 | 513 | INIT_LIST_HEAD(&clp->cl_lru); |
1da177e4 LT |
514 | return clp; |
515 | } | |
516 | ||
35bba9a3 BF |
517 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
518 | { | |
519 | memcpy(target->cl_verifier.data, source->data, | |
520 | sizeof(target->cl_verifier.data)); | |
1da177e4 LT |
521 | } |
522 | ||
35bba9a3 BF |
523 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
524 | { | |
1da177e4 LT |
525 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
526 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; | |
527 | } | |
528 | ||
35bba9a3 BF |
529 | static void copy_cred(struct svc_cred *target, struct svc_cred *source) |
530 | { | |
1da177e4 LT |
531 | target->cr_uid = source->cr_uid; |
532 | target->cr_gid = source->cr_gid; | |
533 | target->cr_group_info = source->cr_group_info; | |
534 | get_group_info(target->cr_group_info); | |
535 | } | |
536 | ||
35bba9a3 | 537 | static int same_name(const char *n1, const char *n2) |
599e0a22 | 538 | { |
a55370a3 | 539 | return 0 == memcmp(n1, n2, HEXDIR_LEN); |
1da177e4 LT |
540 | } |
541 | ||
542 | static int | |
599e0a22 BF |
543 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
544 | { | |
545 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); | |
1da177e4 LT |
546 | } |
547 | ||
548 | static int | |
599e0a22 BF |
549 | same_clid(clientid_t *cl1, clientid_t *cl2) |
550 | { | |
551 | return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); | |
1da177e4 LT |
552 | } |
553 | ||
554 | /* XXX what about NGROUP */ | |
555 | static int | |
599e0a22 BF |
556 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
557 | { | |
558 | return cr1->cr_uid == cr2->cr_uid; | |
1da177e4 LT |
559 | } |
560 | ||
5ec7b46c BF |
561 | static void gen_clid(struct nfs4_client *clp) |
562 | { | |
563 | static u32 current_clientid = 1; | |
564 | ||
1da177e4 LT |
565 | clp->cl_clientid.cl_boot = boot_time; |
566 | clp->cl_clientid.cl_id = current_clientid++; | |
567 | } | |
568 | ||
deda2faa BF |
569 | static void gen_confirm(struct nfs4_client *clp) |
570 | { | |
571 | static u32 i; | |
572 | u32 *p; | |
1da177e4 | 573 | |
1da177e4 | 574 | p = (u32 *)clp->cl_confirm.data; |
deda2faa BF |
575 | *p++ = get_seconds(); |
576 | *p++ = i++; | |
1da177e4 LT |
577 | } |
578 | ||
35bba9a3 BF |
579 | static int check_name(struct xdr_netobj name) |
580 | { | |
1da177e4 LT |
581 | if (name.len == 0) |
582 | return 0; | |
583 | if (name.len > NFS4_OPAQUE_LIMIT) { | |
2fdada03 | 584 | dprintk("NFSD: check_name: name too long(%d)!\n", name.len); |
1da177e4 LT |
585 | return 0; |
586 | } | |
587 | return 1; | |
588 | } | |
589 | ||
fd39ca9a | 590 | static void |
1da177e4 LT |
591 | add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) |
592 | { | |
593 | unsigned int idhashval; | |
594 | ||
595 | list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); | |
596 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
597 | list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); | |
598 | list_add_tail(&clp->cl_lru, &client_lru); | |
599 | clp->cl_time = get_seconds(); | |
600 | } | |
601 | ||
fd39ca9a | 602 | static void |
1da177e4 LT |
603 | move_to_confirmed(struct nfs4_client *clp) |
604 | { | |
605 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
606 | unsigned int strhashval; | |
607 | ||
608 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); | |
609 | list_del_init(&clp->cl_strhash); | |
f116629d | 610 | list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); |
a55370a3 | 611 | strhashval = clientstr_hashval(clp->cl_recdir); |
1da177e4 LT |
612 | list_add(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); |
613 | renew_client(clp); | |
614 | } | |
615 | ||
616 | static struct nfs4_client * | |
617 | find_confirmed_client(clientid_t *clid) | |
618 | { | |
619 | struct nfs4_client *clp; | |
620 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
621 | ||
622 | list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { | |
599e0a22 | 623 | if (same_clid(&clp->cl_clientid, clid)) |
1da177e4 LT |
624 | return clp; |
625 | } | |
626 | return NULL; | |
627 | } | |
628 | ||
629 | static struct nfs4_client * | |
630 | find_unconfirmed_client(clientid_t *clid) | |
631 | { | |
632 | struct nfs4_client *clp; | |
633 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
634 | ||
635 | list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { | |
599e0a22 | 636 | if (same_clid(&clp->cl_clientid, clid)) |
1da177e4 LT |
637 | return clp; |
638 | } | |
639 | return NULL; | |
640 | } | |
641 | ||
28ce6054 N |
642 | static struct nfs4_client * |
643 | find_confirmed_client_by_str(const char *dname, unsigned int hashval) | |
644 | { | |
645 | struct nfs4_client *clp; | |
646 | ||
647 | list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) { | |
648 | if (same_name(clp->cl_recdir, dname)) | |
649 | return clp; | |
650 | } | |
651 | return NULL; | |
652 | } | |
653 | ||
654 | static struct nfs4_client * | |
655 | find_unconfirmed_client_by_str(const char *dname, unsigned int hashval) | |
656 | { | |
657 | struct nfs4_client *clp; | |
658 | ||
659 | list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) { | |
660 | if (same_name(clp->cl_recdir, dname)) | |
661 | return clp; | |
662 | } | |
663 | return NULL; | |
664 | } | |
665 | ||
1da177e4 LT |
666 | /* a helper function for parse_callback */ |
667 | static int | |
668 | parse_octet(unsigned int *lenp, char **addrp) | |
669 | { | |
670 | unsigned int len = *lenp; | |
671 | char *p = *addrp; | |
672 | int n = -1; | |
673 | char c; | |
674 | ||
675 | for (;;) { | |
676 | if (!len) | |
677 | break; | |
678 | len--; | |
679 | c = *p++; | |
680 | if (c == '.') | |
681 | break; | |
682 | if ((c < '0') || (c > '9')) { | |
683 | n = -1; | |
684 | break; | |
685 | } | |
686 | if (n < 0) | |
687 | n = 0; | |
688 | n = (n * 10) + (c - '0'); | |
689 | if (n > 255) { | |
690 | n = -1; | |
691 | break; | |
692 | } | |
693 | } | |
694 | *lenp = len; | |
695 | *addrp = p; | |
696 | return n; | |
697 | } | |
698 | ||
699 | /* parse and set the setclientid ipv4 callback address */ | |
fd39ca9a | 700 | static int |
1da177e4 LT |
701 | parse_ipv4(unsigned int addr_len, char *addr_val, unsigned int *cbaddrp, unsigned short *cbportp) |
702 | { | |
703 | int temp = 0; | |
704 | u32 cbaddr = 0; | |
705 | u16 cbport = 0; | |
706 | u32 addrlen = addr_len; | |
707 | char *addr = addr_val; | |
708 | int i, shift; | |
709 | ||
710 | /* ipaddress */ | |
711 | shift = 24; | |
712 | for(i = 4; i > 0 ; i--) { | |
713 | if ((temp = parse_octet(&addrlen, &addr)) < 0) { | |
714 | return 0; | |
715 | } | |
716 | cbaddr |= (temp << shift); | |
717 | if (shift > 0) | |
718 | shift -= 8; | |
719 | } | |
720 | *cbaddrp = cbaddr; | |
721 | ||
722 | /* port */ | |
723 | shift = 8; | |
724 | for(i = 2; i > 0 ; i--) { | |
725 | if ((temp = parse_octet(&addrlen, &addr)) < 0) { | |
726 | return 0; | |
727 | } | |
728 | cbport |= (temp << shift); | |
729 | if (shift > 0) | |
730 | shift -= 8; | |
731 | } | |
732 | *cbportp = cbport; | |
733 | return 1; | |
734 | } | |
735 | ||
fd39ca9a | 736 | static void |
1da177e4 LT |
737 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se) |
738 | { | |
739 | struct nfs4_callback *cb = &clp->cl_callback; | |
740 | ||
741 | /* Currently, we only support tcp for the callback channel */ | |
742 | if ((se->se_callback_netid_len != 3) || memcmp((char *)se->se_callback_netid_val, "tcp", 3)) | |
743 | goto out_err; | |
744 | ||
745 | if ( !(parse_ipv4(se->se_callback_addr_len, se->se_callback_addr_val, | |
746 | &cb->cb_addr, &cb->cb_port))) | |
747 | goto out_err; | |
748 | cb->cb_prog = se->se_callback_prog; | |
749 | cb->cb_ident = se->se_callback_ident; | |
1da177e4 LT |
750 | return; |
751 | out_err: | |
849823c5 | 752 | dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " |
1da177e4 LT |
753 | "will not receive delegations\n", |
754 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
755 | ||
1da177e4 LT |
756 | return; |
757 | } | |
758 | ||
b37ad28b | 759 | __be32 |
b591480b BF |
760 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
761 | struct nfsd4_setclientid *setclid) | |
1da177e4 | 762 | { |
27459f09 | 763 | struct sockaddr_in *sin = svc_addr_in(rqstp); |
1da177e4 LT |
764 | struct xdr_netobj clname = { |
765 | .len = setclid->se_namelen, | |
766 | .data = setclid->se_name, | |
767 | }; | |
768 | nfs4_verifier clverifier = setclid->se_verf; | |
769 | unsigned int strhashval; | |
28ce6054 | 770 | struct nfs4_client *conf, *unconf, *new; |
b37ad28b | 771 | __be32 status; |
68e76ad0 | 772 | char *princ; |
a55370a3 | 773 | char dname[HEXDIR_LEN]; |
1da177e4 | 774 | |
1da177e4 | 775 | if (!check_name(clname)) |
73aea4ec | 776 | return nfserr_inval; |
1da177e4 | 777 | |
a55370a3 N |
778 | status = nfs4_make_rec_clidname(dname, &clname); |
779 | if (status) | |
73aea4ec | 780 | return status; |
a55370a3 | 781 | |
1da177e4 LT |
782 | /* |
783 | * XXX The Duplicate Request Cache (DRC) has been checked (??) | |
784 | * We get here on a DRC miss. | |
785 | */ | |
786 | ||
a55370a3 | 787 | strhashval = clientstr_hashval(dname); |
1da177e4 | 788 | |
1da177e4 | 789 | nfs4_lock_state(); |
28ce6054 N |
790 | conf = find_confirmed_client_by_str(dname, strhashval); |
791 | if (conf) { | |
a186e767 | 792 | /* RFC 3530 14.2.33 CASE 0: */ |
1da177e4 | 793 | status = nfserr_clid_inuse; |
599e0a22 | 794 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred) |
27459f09 | 795 | || conf->cl_addr != sin->sin_addr.s_addr) { |
be859405 HH |
796 | dprintk("NFSD: setclientid: string in use by clientat %pI4\n", |
797 | &conf->cl_addr); | |
1da177e4 LT |
798 | goto out; |
799 | } | |
1da177e4 | 800 | } |
a186e767 BF |
801 | /* |
802 | * section 14.2.33 of RFC 3530 (under the heading "IMPLEMENTATION") | |
803 | * has a description of SETCLIENTID request processing consisting | |
804 | * of 5 bullet points, labeled as CASE0 - CASE4 below. | |
805 | */ | |
28ce6054 | 806 | unconf = find_unconfirmed_client_by_str(dname, strhashval); |
1da177e4 LT |
807 | status = nfserr_resource; |
808 | if (!conf) { | |
a186e767 BF |
809 | /* |
810 | * RFC 3530 14.2.33 CASE 4: | |
811 | * placed first, because it is the normal case | |
1da177e4 LT |
812 | */ |
813 | if (unconf) | |
814 | expire_client(unconf); | |
a55370a3 N |
815 | new = create_client(clname, dname); |
816 | if (new == NULL) | |
1da177e4 | 817 | goto out; |
1da177e4 | 818 | gen_clid(new); |
599e0a22 | 819 | } else if (same_verf(&conf->cl_verifier, &clverifier)) { |
1da177e4 | 820 | /* |
a186e767 BF |
821 | * RFC 3530 14.2.33 CASE 1: |
822 | * probable callback update | |
1da177e4 | 823 | */ |
31f4a6c1 N |
824 | if (unconf) { |
825 | /* Note this is removing unconfirmed {*x***}, | |
826 | * which is stronger than RFC recommended {vxc**}. | |
827 | * This has the advantage that there is at most | |
828 | * one {*x***} in either list at any time. | |
829 | */ | |
830 | expire_client(unconf); | |
1da177e4 | 831 | } |
a55370a3 N |
832 | new = create_client(clname, dname); |
833 | if (new == NULL) | |
1da177e4 | 834 | goto out; |
1da177e4 | 835 | copy_clid(new, conf); |
1da177e4 LT |
836 | } else if (!unconf) { |
837 | /* | |
a186e767 BF |
838 | * RFC 3530 14.2.33 CASE 2: |
839 | * probable client reboot; state will be removed if | |
840 | * confirmed. | |
1da177e4 | 841 | */ |
a55370a3 N |
842 | new = create_client(clname, dname); |
843 | if (new == NULL) | |
1da177e4 | 844 | goto out; |
1da177e4 | 845 | gen_clid(new); |
49ba8781 | 846 | } else { |
a186e767 BF |
847 | /* |
848 | * RFC 3530 14.2.33 CASE 3: | |
849 | * probable client reboot; state will be removed if | |
850 | * confirmed. | |
1da177e4 LT |
851 | */ |
852 | expire_client(unconf); | |
a55370a3 N |
853 | new = create_client(clname, dname); |
854 | if (new == NULL) | |
1da177e4 | 855 | goto out; |
1da177e4 | 856 | gen_clid(new); |
1da177e4 | 857 | } |
c175b83c BF |
858 | copy_verf(new, &clverifier); |
859 | new->cl_addr = sin->sin_addr.s_addr; | |
61054b14 | 860 | new->cl_flavor = rqstp->rq_flavor; |
68e76ad0 OK |
861 | princ = svc_gss_principal(rqstp); |
862 | if (princ) { | |
863 | new->cl_principal = kstrdup(princ, GFP_KERNEL); | |
864 | if (new->cl_principal == NULL) { | |
865 | free_client(new); | |
866 | goto out; | |
867 | } | |
868 | } | |
c175b83c BF |
869 | copy_cred(&new->cl_cred, &rqstp->rq_cred); |
870 | gen_confirm(new); | |
871 | gen_callback(new, setclid); | |
872 | add_to_unconfirmed(new, strhashval); | |
1da177e4 LT |
873 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
874 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; | |
875 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); | |
876 | status = nfs_ok; | |
877 | out: | |
878 | nfs4_unlock_state(); | |
879 | return status; | |
880 | } | |
881 | ||
882 | ||
883 | /* | |
a186e767 BF |
884 | * Section 14.2.34 of RFC 3530 (under the heading "IMPLEMENTATION") has |
885 | * a description of SETCLIENTID_CONFIRM request processing consisting of 4 | |
886 | * bullets, labeled as CASE1 - CASE4 below. | |
1da177e4 | 887 | */ |
b37ad28b | 888 | __be32 |
b591480b BF |
889 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
890 | struct nfsd4_compound_state *cstate, | |
891 | struct nfsd4_setclientid_confirm *setclientid_confirm) | |
1da177e4 | 892 | { |
27459f09 | 893 | struct sockaddr_in *sin = svc_addr_in(rqstp); |
21ab45a4 | 894 | struct nfs4_client *conf, *unconf; |
1da177e4 LT |
895 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
896 | clientid_t * clid = &setclientid_confirm->sc_clientid; | |
b37ad28b | 897 | __be32 status; |
1da177e4 LT |
898 | |
899 | if (STALE_CLIENTID(clid)) | |
900 | return nfserr_stale_clientid; | |
901 | /* | |
902 | * XXX The Duplicate Request Cache (DRC) has been checked (??) | |
903 | * We get here on a DRC miss. | |
904 | */ | |
905 | ||
906 | nfs4_lock_state(); | |
21ab45a4 N |
907 | |
908 | conf = find_confirmed_client(clid); | |
909 | unconf = find_unconfirmed_client(clid); | |
910 | ||
911 | status = nfserr_clid_inuse; | |
27459f09 | 912 | if (conf && conf->cl_addr != sin->sin_addr.s_addr) |
21ab45a4 | 913 | goto out; |
27459f09 | 914 | if (unconf && unconf->cl_addr != sin->sin_addr.s_addr) |
21ab45a4 N |
915 | goto out; |
916 | ||
a186e767 BF |
917 | /* |
918 | * section 14.2.34 of RFC 3530 has a description of | |
919 | * SETCLIENTID_CONFIRM request processing consisting | |
920 | * of 4 bullet points, labeled as CASE1 - CASE4 below. | |
921 | */ | |
366e0c1d | 922 | if (conf && unconf && same_verf(&confirm, &unconf->cl_confirm)) { |
a186e767 BF |
923 | /* |
924 | * RFC 3530 14.2.34 CASE 1: | |
925 | * callback update | |
926 | */ | |
599e0a22 | 927 | if (!same_creds(&conf->cl_cred, &unconf->cl_cred)) |
1da177e4 LT |
928 | status = nfserr_clid_inuse; |
929 | else { | |
1a69c179 N |
930 | /* XXX: We just turn off callbacks until we can handle |
931 | * change request correctly. */ | |
cb36d634 | 932 | atomic_set(&conf->cl_callback.cb_set, 0); |
21ab45a4 | 933 | gen_confirm(conf); |
46309029 | 934 | nfsd4_remove_clid_dir(unconf); |
1a69c179 | 935 | expire_client(unconf); |
1da177e4 | 936 | status = nfs_ok; |
1a69c179 | 937 | |
1da177e4 | 938 | } |
f3aba4e5 | 939 | } else if (conf && !unconf) { |
a186e767 BF |
940 | /* |
941 | * RFC 3530 14.2.34 CASE 2: | |
942 | * probable retransmitted request; play it safe and | |
943 | * do nothing. | |
7c79f737 | 944 | */ |
599e0a22 | 945 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) |
1da177e4 | 946 | status = nfserr_clid_inuse; |
21ab45a4 | 947 | else |
1da177e4 | 948 | status = nfs_ok; |
7c79f737 | 949 | } else if (!conf && unconf |
599e0a22 | 950 | && same_verf(&unconf->cl_confirm, &confirm)) { |
a186e767 BF |
951 | /* |
952 | * RFC 3530 14.2.34 CASE 3: | |
953 | * Normal case; new or rebooted client: | |
7c79f737 | 954 | */ |
599e0a22 | 955 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred)) { |
1da177e4 LT |
956 | status = nfserr_clid_inuse; |
957 | } else { | |
1a69c179 N |
958 | unsigned int hash = |
959 | clientstr_hashval(unconf->cl_recdir); | |
960 | conf = find_confirmed_client_by_str(unconf->cl_recdir, | |
961 | hash); | |
962 | if (conf) { | |
c7b9a459 | 963 | nfsd4_remove_clid_dir(conf); |
1a69c179 N |
964 | expire_client(conf); |
965 | } | |
1da177e4 | 966 | move_to_confirmed(unconf); |
21ab45a4 | 967 | conf = unconf; |
46f8a64b | 968 | nfsd4_probe_callback(conf); |
1a69c179 | 969 | status = nfs_ok; |
1da177e4 | 970 | } |
599e0a22 BF |
971 | } else if ((!conf || (conf && !same_verf(&conf->cl_confirm, &confirm))) |
972 | && (!unconf || (unconf && !same_verf(&unconf->cl_confirm, | |
7c79f737 | 973 | &confirm)))) { |
a186e767 BF |
974 | /* |
975 | * RFC 3530 14.2.34 CASE 4: | |
976 | * Client probably hasn't noticed that we rebooted yet. | |
7c79f737 | 977 | */ |
1da177e4 | 978 | status = nfserr_stale_clientid; |
7c79f737 | 979 | } else { |
08e8987c N |
980 | /* check that we have hit one of the cases...*/ |
981 | status = nfserr_clid_inuse; | |
982 | } | |
1da177e4 | 983 | out: |
1da177e4 LT |
984 | nfs4_unlock_state(); |
985 | return status; | |
986 | } | |
987 | ||
1da177e4 LT |
988 | /* OPEN Share state helper functions */ |
989 | static inline struct nfs4_file * | |
990 | alloc_init_file(struct inode *ino) | |
991 | { | |
992 | struct nfs4_file *fp; | |
993 | unsigned int hashval = file_hashval(ino); | |
994 | ||
e60d4398 N |
995 | fp = kmem_cache_alloc(file_slab, GFP_KERNEL); |
996 | if (fp) { | |
8b671b80 | 997 | atomic_set(&fp->fi_ref, 1); |
1da177e4 | 998 | INIT_LIST_HEAD(&fp->fi_hash); |
8beefa24 N |
999 | INIT_LIST_HEAD(&fp->fi_stateids); |
1000 | INIT_LIST_HEAD(&fp->fi_delegations); | |
8b671b80 | 1001 | spin_lock(&recall_lock); |
1da177e4 | 1002 | list_add(&fp->fi_hash, &file_hashtbl[hashval]); |
8b671b80 | 1003 | spin_unlock(&recall_lock); |
1da177e4 LT |
1004 | fp->fi_inode = igrab(ino); |
1005 | fp->fi_id = current_fileid++; | |
47f9940c | 1006 | fp->fi_had_conflict = false; |
1da177e4 LT |
1007 | return fp; |
1008 | } | |
1009 | return NULL; | |
1010 | } | |
1011 | ||
e60d4398 | 1012 | static void |
e18b890b | 1013 | nfsd4_free_slab(struct kmem_cache **slab) |
1da177e4 | 1014 | { |
e60d4398 N |
1015 | if (*slab == NULL) |
1016 | return; | |
1a1d92c1 | 1017 | kmem_cache_destroy(*slab); |
e60d4398 | 1018 | *slab = NULL; |
1da177e4 LT |
1019 | } |
1020 | ||
e8ff2a84 | 1021 | void |
1da177e4 LT |
1022 | nfsd4_free_slabs(void) |
1023 | { | |
e60d4398 N |
1024 | nfsd4_free_slab(&stateowner_slab); |
1025 | nfsd4_free_slab(&file_slab); | |
5ac049ac | 1026 | nfsd4_free_slab(&stateid_slab); |
5b2d21c1 | 1027 | nfsd4_free_slab(&deleg_slab); |
e60d4398 | 1028 | } |
1da177e4 | 1029 | |
e60d4398 N |
1030 | static int |
1031 | nfsd4_init_slabs(void) | |
1032 | { | |
1033 | stateowner_slab = kmem_cache_create("nfsd4_stateowners", | |
20c2df83 | 1034 | sizeof(struct nfs4_stateowner), 0, 0, NULL); |
e60d4398 N |
1035 | if (stateowner_slab == NULL) |
1036 | goto out_nomem; | |
1037 | file_slab = kmem_cache_create("nfsd4_files", | |
20c2df83 | 1038 | sizeof(struct nfs4_file), 0, 0, NULL); |
e60d4398 N |
1039 | if (file_slab == NULL) |
1040 | goto out_nomem; | |
5ac049ac | 1041 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
20c2df83 | 1042 | sizeof(struct nfs4_stateid), 0, 0, NULL); |
5ac049ac N |
1043 | if (stateid_slab == NULL) |
1044 | goto out_nomem; | |
5b2d21c1 | 1045 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
20c2df83 | 1046 | sizeof(struct nfs4_delegation), 0, 0, NULL); |
5b2d21c1 N |
1047 | if (deleg_slab == NULL) |
1048 | goto out_nomem; | |
e60d4398 N |
1049 | return 0; |
1050 | out_nomem: | |
1051 | nfsd4_free_slabs(); | |
1052 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); | |
1053 | return -ENOMEM; | |
1da177e4 LT |
1054 | } |
1055 | ||
1056 | void | |
1057 | nfs4_free_stateowner(struct kref *kref) | |
1058 | { | |
1059 | struct nfs4_stateowner *sop = | |
1060 | container_of(kref, struct nfs4_stateowner, so_ref); | |
1061 | kfree(sop->so_owner.data); | |
1062 | kmem_cache_free(stateowner_slab, sop); | |
1063 | } | |
1064 | ||
1065 | static inline struct nfs4_stateowner * | |
1066 | alloc_stateowner(struct xdr_netobj *owner) | |
1067 | { | |
1068 | struct nfs4_stateowner *sop; | |
1069 | ||
1070 | if ((sop = kmem_cache_alloc(stateowner_slab, GFP_KERNEL))) { | |
1071 | if ((sop->so_owner.data = kmalloc(owner->len, GFP_KERNEL))) { | |
1072 | memcpy(sop->so_owner.data, owner->data, owner->len); | |
1073 | sop->so_owner.len = owner->len; | |
1074 | kref_init(&sop->so_ref); | |
1075 | return sop; | |
1076 | } | |
1077 | kmem_cache_free(stateowner_slab, sop); | |
1078 | } | |
1079 | return NULL; | |
1080 | } | |
1081 | ||
1082 | static struct nfs4_stateowner * | |
1083 | alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { | |
1084 | struct nfs4_stateowner *sop; | |
1085 | struct nfs4_replay *rp; | |
1086 | unsigned int idhashval; | |
1087 | ||
1088 | if (!(sop = alloc_stateowner(&open->op_owner))) | |
1089 | return NULL; | |
1090 | idhashval = ownerid_hashval(current_ownerid); | |
1091 | INIT_LIST_HEAD(&sop->so_idhash); | |
1092 | INIT_LIST_HEAD(&sop->so_strhash); | |
1093 | INIT_LIST_HEAD(&sop->so_perclient); | |
ea1da636 N |
1094 | INIT_LIST_HEAD(&sop->so_stateids); |
1095 | INIT_LIST_HEAD(&sop->so_perstateid); /* not used */ | |
1da177e4 LT |
1096 | INIT_LIST_HEAD(&sop->so_close_lru); |
1097 | sop->so_time = 0; | |
1098 | list_add(&sop->so_idhash, &ownerid_hashtbl[idhashval]); | |
1099 | list_add(&sop->so_strhash, &ownerstr_hashtbl[strhashval]); | |
ea1da636 | 1100 | list_add(&sop->so_perclient, &clp->cl_openowners); |
1da177e4 LT |
1101 | sop->so_is_open_owner = 1; |
1102 | sop->so_id = current_ownerid++; | |
1103 | sop->so_client = clp; | |
1104 | sop->so_seqid = open->op_seqid; | |
1105 | sop->so_confirmed = 0; | |
1106 | rp = &sop->so_replay; | |
de1ae286 | 1107 | rp->rp_status = nfserr_serverfault; |
1da177e4 LT |
1108 | rp->rp_buflen = 0; |
1109 | rp->rp_buf = rp->rp_ibuf; | |
1110 | return sop; | |
1111 | } | |
1112 | ||
1da177e4 LT |
1113 | static inline void |
1114 | init_stateid(struct nfs4_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { | |
1115 | struct nfs4_stateowner *sop = open->op_stateowner; | |
1116 | unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); | |
1117 | ||
1118 | INIT_LIST_HEAD(&stp->st_hash); | |
ea1da636 N |
1119 | INIT_LIST_HEAD(&stp->st_perstateowner); |
1120 | INIT_LIST_HEAD(&stp->st_lockowners); | |
1da177e4 LT |
1121 | INIT_LIST_HEAD(&stp->st_perfile); |
1122 | list_add(&stp->st_hash, &stateid_hashtbl[hashval]); | |
ea1da636 | 1123 | list_add(&stp->st_perstateowner, &sop->so_stateids); |
8beefa24 | 1124 | list_add(&stp->st_perfile, &fp->fi_stateids); |
1da177e4 | 1125 | stp->st_stateowner = sop; |
13cd2184 | 1126 | get_nfs4_file(fp); |
1da177e4 LT |
1127 | stp->st_file = fp; |
1128 | stp->st_stateid.si_boot = boot_time; | |
1129 | stp->st_stateid.si_stateownerid = sop->so_id; | |
1130 | stp->st_stateid.si_fileid = fp->fi_id; | |
1131 | stp->st_stateid.si_generation = 0; | |
1132 | stp->st_access_bmap = 0; | |
1133 | stp->st_deny_bmap = 0; | |
1134 | __set_bit(open->op_share_access, &stp->st_access_bmap); | |
1135 | __set_bit(open->op_share_deny, &stp->st_deny_bmap); | |
4c4cd222 | 1136 | stp->st_openstp = NULL; |
1da177e4 LT |
1137 | } |
1138 | ||
fd39ca9a | 1139 | static void |
1da177e4 LT |
1140 | move_to_close_lru(struct nfs4_stateowner *sop) |
1141 | { | |
1142 | dprintk("NFSD: move_to_close_lru nfs4_stateowner %p\n", sop); | |
1143 | ||
358dd55a | 1144 | list_move_tail(&sop->so_close_lru, &close_lru); |
1da177e4 LT |
1145 | sop->so_time = get_seconds(); |
1146 | } | |
1147 | ||
1da177e4 | 1148 | static int |
599e0a22 BF |
1149 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, |
1150 | clientid_t *clid) | |
1151 | { | |
1152 | return (sop->so_owner.len == owner->len) && | |
1153 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && | |
1154 | (sop->so_client->cl_clientid.cl_id == clid->cl_id); | |
1da177e4 LT |
1155 | } |
1156 | ||
1157 | static struct nfs4_stateowner * | |
1158 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open) | |
1159 | { | |
1160 | struct nfs4_stateowner *so = NULL; | |
1161 | ||
1162 | list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) { | |
599e0a22 | 1163 | if (same_owner_str(so, &open->op_owner, &open->op_clientid)) |
1da177e4 LT |
1164 | return so; |
1165 | } | |
1166 | return NULL; | |
1167 | } | |
1168 | ||
1169 | /* search file_hashtbl[] for file */ | |
1170 | static struct nfs4_file * | |
1171 | find_file(struct inode *ino) | |
1172 | { | |
1173 | unsigned int hashval = file_hashval(ino); | |
1174 | struct nfs4_file *fp; | |
1175 | ||
8b671b80 | 1176 | spin_lock(&recall_lock); |
1da177e4 | 1177 | list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { |
13cd2184 N |
1178 | if (fp->fi_inode == ino) { |
1179 | get_nfs4_file(fp); | |
8b671b80 | 1180 | spin_unlock(&recall_lock); |
1da177e4 | 1181 | return fp; |
13cd2184 | 1182 | } |
1da177e4 | 1183 | } |
8b671b80 | 1184 | spin_unlock(&recall_lock); |
1da177e4 LT |
1185 | return NULL; |
1186 | } | |
1187 | ||
8838dc43 | 1188 | static inline int access_valid(u32 x) |
ba5a6a19 | 1189 | { |
8838dc43 BF |
1190 | if (x < NFS4_SHARE_ACCESS_READ) |
1191 | return 0; | |
1192 | if (x > NFS4_SHARE_ACCESS_BOTH) | |
1193 | return 0; | |
1194 | return 1; | |
ba5a6a19 BF |
1195 | } |
1196 | ||
8838dc43 | 1197 | static inline int deny_valid(u32 x) |
ba5a6a19 | 1198 | { |
8838dc43 BF |
1199 | /* Note: unlike access bits, deny bits may be zero. */ |
1200 | return x <= NFS4_SHARE_DENY_BOTH; | |
ba5a6a19 | 1201 | } |
1da177e4 | 1202 | |
4f83aa30 BF |
1203 | /* |
1204 | * We store the NONE, READ, WRITE, and BOTH bits separately in the | |
1205 | * st_{access,deny}_bmap field of the stateid, in order to track not | |
1206 | * only what share bits are currently in force, but also what | |
1207 | * combinations of share bits previous opens have used. This allows us | |
1208 | * to enforce the recommendation of rfc 3530 14.2.19 that the server | |
1209 | * return an error if the client attempt to downgrade to a combination | |
1210 | * of share bits not explicable by closing some of its previous opens. | |
1211 | * | |
1212 | * XXX: This enforcement is actually incomplete, since we don't keep | |
1213 | * track of access/deny bit combinations; so, e.g., we allow: | |
1214 | * | |
1215 | * OPEN allow read, deny write | |
1216 | * OPEN allow both, deny none | |
1217 | * DOWNGRADE allow read, deny none | |
1218 | * | |
1219 | * which we should reject. | |
1220 | */ | |
fd39ca9a | 1221 | static void |
1da177e4 LT |
1222 | set_access(unsigned int *access, unsigned long bmap) { |
1223 | int i; | |
1224 | ||
1225 | *access = 0; | |
1226 | for (i = 1; i < 4; i++) { | |
1227 | if (test_bit(i, &bmap)) | |
1228 | *access |= i; | |
1229 | } | |
1230 | } | |
1231 | ||
fd39ca9a | 1232 | static void |
1da177e4 LT |
1233 | set_deny(unsigned int *deny, unsigned long bmap) { |
1234 | int i; | |
1235 | ||
1236 | *deny = 0; | |
1237 | for (i = 0; i < 4; i++) { | |
1238 | if (test_bit(i, &bmap)) | |
1239 | *deny |= i ; | |
1240 | } | |
1241 | } | |
1242 | ||
1243 | static int | |
1244 | test_share(struct nfs4_stateid *stp, struct nfsd4_open *open) { | |
1245 | unsigned int access, deny; | |
1246 | ||
1247 | set_access(&access, stp->st_access_bmap); | |
1248 | set_deny(&deny, stp->st_deny_bmap); | |
1249 | if ((access & open->op_share_deny) || (deny & open->op_share_access)) | |
1250 | return 0; | |
1251 | return 1; | |
1252 | } | |
1253 | ||
1254 | /* | |
1255 | * Called to check deny when READ with all zero stateid or | |
1256 | * WRITE with all zero or all one stateid | |
1257 | */ | |
b37ad28b | 1258 | static __be32 |
1da177e4 LT |
1259 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
1260 | { | |
1261 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
1262 | struct nfs4_file *fp; | |
1263 | struct nfs4_stateid *stp; | |
b37ad28b | 1264 | __be32 ret; |
1da177e4 LT |
1265 | |
1266 | dprintk("NFSD: nfs4_share_conflict\n"); | |
1267 | ||
1268 | fp = find_file(ino); | |
13cd2184 N |
1269 | if (!fp) |
1270 | return nfs_ok; | |
b700949b | 1271 | ret = nfserr_locked; |
1da177e4 | 1272 | /* Search for conflicting share reservations */ |
13cd2184 N |
1273 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { |
1274 | if (test_bit(deny_type, &stp->st_deny_bmap) || | |
1275 | test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap)) | |
1276 | goto out; | |
1da177e4 | 1277 | } |
13cd2184 N |
1278 | ret = nfs_ok; |
1279 | out: | |
1280 | put_nfs4_file(fp); | |
1281 | return ret; | |
1da177e4 LT |
1282 | } |
1283 | ||
1284 | static inline void | |
1285 | nfs4_file_downgrade(struct file *filp, unsigned int share_access) | |
1286 | { | |
1287 | if (share_access & NFS4_SHARE_ACCESS_WRITE) { | |
aceaf78d | 1288 | drop_file_write_access(filp); |
1da177e4 LT |
1289 | filp->f_mode = (filp->f_mode | FMODE_READ) & ~FMODE_WRITE; |
1290 | } | |
1291 | } | |
1292 | ||
1293 | /* | |
1294 | * Recall a delegation | |
1295 | */ | |
1296 | static int | |
1297 | do_recall(void *__dp) | |
1298 | { | |
1299 | struct nfs4_delegation *dp = __dp; | |
1300 | ||
47f9940c | 1301 | dp->dl_file->fi_had_conflict = true; |
1da177e4 LT |
1302 | nfsd4_cb_recall(dp); |
1303 | return 0; | |
1304 | } | |
1305 | ||
1306 | /* | |
1307 | * Spawn a thread to perform a recall on the delegation represented | |
1308 | * by the lease (file_lock) | |
1309 | * | |
1310 | * Called from break_lease() with lock_kernel() held. | |
1311 | * Note: we assume break_lease will only call this *once* for any given | |
1312 | * lease. | |
1313 | */ | |
1314 | static | |
1315 | void nfsd_break_deleg_cb(struct file_lock *fl) | |
1316 | { | |
1317 | struct nfs4_delegation *dp= (struct nfs4_delegation *)fl->fl_owner; | |
1318 | struct task_struct *t; | |
1319 | ||
1320 | dprintk("NFSD nfsd_break_deleg_cb: dp %p fl %p\n",dp,fl); | |
1321 | if (!dp) | |
1322 | return; | |
1323 | ||
1324 | /* We're assuming the state code never drops its reference | |
1325 | * without first removing the lease. Since we're in this lease | |
1326 | * callback (and since the lease code is serialized by the kernel | |
1327 | * lock) we know the server hasn't removed the lease yet, we know | |
1328 | * it's safe to take a reference: */ | |
1329 | atomic_inc(&dp->dl_count); | |
cfdcad4d | 1330 | atomic_inc(&dp->dl_client->cl_count); |
1da177e4 LT |
1331 | |
1332 | spin_lock(&recall_lock); | |
1333 | list_add_tail(&dp->dl_recall_lru, &del_recall_lru); | |
1334 | spin_unlock(&recall_lock); | |
1335 | ||
1336 | /* only place dl_time is set. protected by lock_kernel*/ | |
1337 | dp->dl_time = get_seconds(); | |
1338 | ||
0272e1fd BF |
1339 | /* |
1340 | * We don't want the locks code to timeout the lease for us; | |
1341 | * we'll remove it ourself if the delegation isn't returned | |
1342 | * in time. | |
1343 | */ | |
1344 | fl->fl_break_time = 0; | |
1da177e4 LT |
1345 | |
1346 | t = kthread_run(do_recall, dp, "%s", "nfs4_cb_recall"); | |
1347 | if (IS_ERR(t)) { | |
1348 | struct nfs4_client *clp = dp->dl_client; | |
1349 | ||
1350 | printk(KERN_INFO "NFSD: Callback thread failed for " | |
1351 | "for client (clientid %08x/%08x)\n", | |
1352 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
cfdcad4d | 1353 | put_nfs4_client(dp->dl_client); |
1da177e4 LT |
1354 | nfs4_put_delegation(dp); |
1355 | } | |
1356 | } | |
1357 | ||
1358 | /* | |
1359 | * The file_lock is being reapd. | |
1360 | * | |
1361 | * Called by locks_free_lock() with lock_kernel() held. | |
1362 | */ | |
1363 | static | |
1364 | void nfsd_release_deleg_cb(struct file_lock *fl) | |
1365 | { | |
1366 | struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner; | |
1367 | ||
1368 | dprintk("NFSD nfsd_release_deleg_cb: fl %p dp %p dl_count %d\n", fl,dp, atomic_read(&dp->dl_count)); | |
1369 | ||
1370 | if (!(fl->fl_flags & FL_LEASE) || !dp) | |
1371 | return; | |
1372 | dp->dl_flock = NULL; | |
1373 | } | |
1374 | ||
1375 | /* | |
1376 | * Set the delegation file_lock back pointer. | |
1377 | * | |
a9933cea | 1378 | * Called from setlease() with lock_kernel() held. |
1da177e4 LT |
1379 | */ |
1380 | static | |
1381 | void nfsd_copy_lock_deleg_cb(struct file_lock *new, struct file_lock *fl) | |
1382 | { | |
1383 | struct nfs4_delegation *dp = (struct nfs4_delegation *)new->fl_owner; | |
1384 | ||
1385 | dprintk("NFSD: nfsd_copy_lock_deleg_cb: new fl %p dp %p\n", new, dp); | |
1386 | if (!dp) | |
1387 | return; | |
1388 | dp->dl_flock = new; | |
1389 | } | |
1390 | ||
1391 | /* | |
a9933cea | 1392 | * Called from setlease() with lock_kernel() held |
1da177e4 LT |
1393 | */ |
1394 | static | |
1395 | int nfsd_same_client_deleg_cb(struct file_lock *onlist, struct file_lock *try) | |
1396 | { | |
1397 | struct nfs4_delegation *onlistd = | |
1398 | (struct nfs4_delegation *)onlist->fl_owner; | |
1399 | struct nfs4_delegation *tryd = | |
1400 | (struct nfs4_delegation *)try->fl_owner; | |
1401 | ||
1402 | if (onlist->fl_lmops != try->fl_lmops) | |
1403 | return 0; | |
1404 | ||
1405 | return onlistd->dl_client == tryd->dl_client; | |
1406 | } | |
1407 | ||
1408 | ||
1409 | static | |
1410 | int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) | |
1411 | { | |
1412 | if (arg & F_UNLCK) | |
1413 | return lease_modify(onlist, arg); | |
1414 | else | |
1415 | return -EAGAIN; | |
1416 | } | |
1417 | ||
fd39ca9a | 1418 | static struct lock_manager_operations nfsd_lease_mng_ops = { |
1da177e4 LT |
1419 | .fl_break = nfsd_break_deleg_cb, |
1420 | .fl_release_private = nfsd_release_deleg_cb, | |
1421 | .fl_copy_lock = nfsd_copy_lock_deleg_cb, | |
1422 | .fl_mylease = nfsd_same_client_deleg_cb, | |
1423 | .fl_change = nfsd_change_deleg_cb, | |
1424 | }; | |
1425 | ||
1426 | ||
b37ad28b | 1427 | __be32 |
1da177e4 LT |
1428 | nfsd4_process_open1(struct nfsd4_open *open) |
1429 | { | |
1da177e4 LT |
1430 | clientid_t *clientid = &open->op_clientid; |
1431 | struct nfs4_client *clp = NULL; | |
1432 | unsigned int strhashval; | |
1433 | struct nfs4_stateowner *sop = NULL; | |
1434 | ||
1da177e4 | 1435 | if (!check_name(open->op_owner)) |
0f442aa2 | 1436 | return nfserr_inval; |
1da177e4 LT |
1437 | |
1438 | if (STALE_CLIENTID(&open->op_clientid)) | |
1439 | return nfserr_stale_clientid; | |
1440 | ||
1441 | strhashval = ownerstr_hashval(clientid->cl_id, open->op_owner); | |
1442 | sop = find_openstateowner_str(strhashval, open); | |
0f442aa2 BF |
1443 | open->op_stateowner = sop; |
1444 | if (!sop) { | |
1445 | /* Make sure the client's lease hasn't expired. */ | |
1da177e4 LT |
1446 | clp = find_confirmed_client(clientid); |
1447 | if (clp == NULL) | |
0f442aa2 BF |
1448 | return nfserr_expired; |
1449 | goto renew; | |
1da177e4 | 1450 | } |
0f442aa2 BF |
1451 | if (!sop->so_confirmed) { |
1452 | /* Replace unconfirmed owners without checking for replay. */ | |
1453 | clp = sop->so_client; | |
f044ff83 | 1454 | release_openowner(sop); |
0f442aa2 BF |
1455 | open->op_stateowner = NULL; |
1456 | goto renew; | |
1457 | } | |
1458 | if (open->op_seqid == sop->so_seqid - 1) { | |
1459 | if (sop->so_replay.rp_buflen) | |
a90b061c | 1460 | return nfserr_replay_me; |
0f442aa2 BF |
1461 | /* The original OPEN failed so spectacularly |
1462 | * that we don't even have replay data saved! | |
1463 | * Therefore, we have no choice but to continue | |
1464 | * processing this OPEN; presumably, we'll | |
1465 | * fail again for the same reason. | |
1466 | */ | |
1467 | dprintk("nfsd4_process_open1: replay with no replay cache\n"); | |
1468 | goto renew; | |
1469 | } | |
1470 | if (open->op_seqid != sop->so_seqid) | |
1471 | return nfserr_bad_seqid; | |
1da177e4 | 1472 | renew: |
0f442aa2 BF |
1473 | if (open->op_stateowner == NULL) { |
1474 | sop = alloc_init_open_stateowner(strhashval, clp, open); | |
1475 | if (sop == NULL) | |
1476 | return nfserr_resource; | |
1477 | open->op_stateowner = sop; | |
1478 | } | |
1479 | list_del_init(&sop->so_close_lru); | |
1da177e4 | 1480 | renew_client(sop->so_client); |
0f442aa2 | 1481 | return nfs_ok; |
1da177e4 LT |
1482 | } |
1483 | ||
b37ad28b | 1484 | static inline __be32 |
4a6e43e6 N |
1485 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
1486 | { | |
1487 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | |
1488 | return nfserr_openmode; | |
1489 | else | |
1490 | return nfs_ok; | |
1491 | } | |
1492 | ||
52f4fb43 N |
1493 | static struct nfs4_delegation * |
1494 | find_delegation_file(struct nfs4_file *fp, stateid_t *stid) | |
1495 | { | |
1496 | struct nfs4_delegation *dp; | |
1497 | ||
ea1da636 | 1498 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) { |
52f4fb43 N |
1499 | if (dp->dl_stateid.si_stateownerid == stid->si_stateownerid) |
1500 | return dp; | |
1501 | } | |
1502 | return NULL; | |
1503 | } | |
1504 | ||
b37ad28b | 1505 | static __be32 |
567d9829 N |
1506 | nfs4_check_deleg(struct nfs4_file *fp, struct nfsd4_open *open, |
1507 | struct nfs4_delegation **dp) | |
1508 | { | |
1509 | int flags; | |
b37ad28b | 1510 | __be32 status = nfserr_bad_stateid; |
567d9829 N |
1511 | |
1512 | *dp = find_delegation_file(fp, &open->op_delegate_stateid); | |
1513 | if (*dp == NULL) | |
c44c5eeb | 1514 | goto out; |
567d9829 N |
1515 | flags = open->op_share_access == NFS4_SHARE_ACCESS_READ ? |
1516 | RD_STATE : WR_STATE; | |
1517 | status = nfs4_check_delegmode(*dp, flags); | |
1518 | if (status) | |
1519 | *dp = NULL; | |
c44c5eeb N |
1520 | out: |
1521 | if (open->op_claim_type != NFS4_OPEN_CLAIM_DELEGATE_CUR) | |
1522 | return nfs_ok; | |
1523 | if (status) | |
1524 | return status; | |
1525 | open->op_stateowner->so_confirmed = 1; | |
1526 | return nfs_ok; | |
567d9829 N |
1527 | } |
1528 | ||
b37ad28b | 1529 | static __be32 |
1da177e4 LT |
1530 | nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_stateid **stpp) |
1531 | { | |
1532 | struct nfs4_stateid *local; | |
b37ad28b | 1533 | __be32 status = nfserr_share_denied; |
1da177e4 LT |
1534 | struct nfs4_stateowner *sop = open->op_stateowner; |
1535 | ||
8beefa24 | 1536 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { |
1da177e4 LT |
1537 | /* ignore lock owners */ |
1538 | if (local->st_stateowner->so_is_open_owner == 0) | |
1539 | continue; | |
1540 | /* remember if we have seen this open owner */ | |
1541 | if (local->st_stateowner == sop) | |
1542 | *stpp = local; | |
1543 | /* check for conflicting share reservations */ | |
1544 | if (!test_share(local, open)) | |
1545 | goto out; | |
1546 | } | |
1547 | status = 0; | |
1548 | out: | |
1549 | return status; | |
1550 | } | |
1551 | ||
5ac049ac N |
1552 | static inline struct nfs4_stateid * |
1553 | nfs4_alloc_stateid(void) | |
1554 | { | |
1555 | return kmem_cache_alloc(stateid_slab, GFP_KERNEL); | |
1556 | } | |
1557 | ||
b37ad28b | 1558 | static __be32 |
1da177e4 | 1559 | nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_stateid **stpp, |
567d9829 | 1560 | struct nfs4_delegation *dp, |
1da177e4 LT |
1561 | struct svc_fh *cur_fh, int flags) |
1562 | { | |
1563 | struct nfs4_stateid *stp; | |
1da177e4 | 1564 | |
5ac049ac | 1565 | stp = nfs4_alloc_stateid(); |
1da177e4 LT |
1566 | if (stp == NULL) |
1567 | return nfserr_resource; | |
1568 | ||
567d9829 N |
1569 | if (dp) { |
1570 | get_file(dp->dl_vfs_file); | |
1571 | stp->st_vfs_file = dp->dl_vfs_file; | |
1572 | } else { | |
b37ad28b | 1573 | __be32 status; |
567d9829 N |
1574 | status = nfsd_open(rqstp, cur_fh, S_IFREG, flags, |
1575 | &stp->st_vfs_file); | |
1576 | if (status) { | |
1577 | if (status == nfserr_dropit) | |
1578 | status = nfserr_jukebox; | |
5ac049ac | 1579 | kmem_cache_free(stateid_slab, stp); |
567d9829 N |
1580 | return status; |
1581 | } | |
1da177e4 | 1582 | } |
1da177e4 LT |
1583 | *stpp = stp; |
1584 | return 0; | |
1585 | } | |
1586 | ||
b37ad28b | 1587 | static inline __be32 |
1da177e4 LT |
1588 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, |
1589 | struct nfsd4_open *open) | |
1590 | { | |
1591 | struct iattr iattr = { | |
1592 | .ia_valid = ATTR_SIZE, | |
1593 | .ia_size = 0, | |
1594 | }; | |
1595 | if (!open->op_truncate) | |
1596 | return 0; | |
1597 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
9246585a | 1598 | return nfserr_inval; |
1da177e4 LT |
1599 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); |
1600 | } | |
1601 | ||
b37ad28b | 1602 | static __be32 |
1da177e4 LT |
1603 | nfs4_upgrade_open(struct svc_rqst *rqstp, struct svc_fh *cur_fh, struct nfs4_stateid *stp, struct nfsd4_open *open) |
1604 | { | |
1605 | struct file *filp = stp->st_vfs_file; | |
7eaa36e2 | 1606 | struct inode *inode = filp->f_path.dentry->d_inode; |
6c26d08f | 1607 | unsigned int share_access, new_writer; |
b37ad28b | 1608 | __be32 status; |
1da177e4 LT |
1609 | |
1610 | set_access(&share_access, stp->st_access_bmap); | |
6c26d08f BF |
1611 | new_writer = (~share_access) & open->op_share_access |
1612 | & NFS4_SHARE_ACCESS_WRITE; | |
1da177e4 | 1613 | |
6c26d08f | 1614 | if (new_writer) { |
b37ad28b AV |
1615 | int err = get_write_access(inode); |
1616 | if (err) | |
1617 | return nfserrno(err); | |
e518f056 BH |
1618 | err = mnt_want_write(cur_fh->fh_export->ex_path.mnt); |
1619 | if (err) | |
1620 | return nfserrno(err); | |
1621 | file_take_write(filp); | |
6c26d08f | 1622 | } |
1da177e4 LT |
1623 | status = nfsd4_truncate(rqstp, cur_fh, open); |
1624 | if (status) { | |
6c26d08f BF |
1625 | if (new_writer) |
1626 | put_write_access(inode); | |
1da177e4 LT |
1627 | return status; |
1628 | } | |
1629 | /* remember the open */ | |
6c26d08f | 1630 | filp->f_mode |= open->op_share_access; |
b55e0ba1 BF |
1631 | __set_bit(open->op_share_access, &stp->st_access_bmap); |
1632 | __set_bit(open->op_share_deny, &stp->st_deny_bmap); | |
1da177e4 LT |
1633 | |
1634 | return nfs_ok; | |
1635 | } | |
1636 | ||
1637 | ||
1da177e4 | 1638 | static void |
37515177 | 1639 | nfs4_set_claim_prev(struct nfsd4_open *open) |
1da177e4 | 1640 | { |
37515177 N |
1641 | open->op_stateowner->so_confirmed = 1; |
1642 | open->op_stateowner->so_client->cl_firststate = 1; | |
1da177e4 LT |
1643 | } |
1644 | ||
1645 | /* | |
1646 | * Attempt to hand out a delegation. | |
1647 | */ | |
1648 | static void | |
1649 | nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_stateid *stp) | |
1650 | { | |
1651 | struct nfs4_delegation *dp; | |
1652 | struct nfs4_stateowner *sop = stp->st_stateowner; | |
1653 | struct nfs4_callback *cb = &sop->so_client->cl_callback; | |
1654 | struct file_lock fl, *flp = &fl; | |
1655 | int status, flag = 0; | |
1656 | ||
1657 | flag = NFS4_OPEN_DELEGATE_NONE; | |
7b190fec N |
1658 | open->op_recall = 0; |
1659 | switch (open->op_claim_type) { | |
1660 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
1661 | if (!atomic_read(&cb->cb_set)) | |
1662 | open->op_recall = 1; | |
1663 | flag = open->op_delegate_type; | |
1664 | if (flag == NFS4_OPEN_DELEGATE_NONE) | |
1665 | goto out; | |
1666 | break; | |
1667 | case NFS4_OPEN_CLAIM_NULL: | |
1668 | /* Let's not give out any delegations till everyone's | |
1669 | * had the chance to reclaim theirs.... */ | |
af558e33 | 1670 | if (locks_in_grace()) |
7b190fec N |
1671 | goto out; |
1672 | if (!atomic_read(&cb->cb_set) || !sop->so_confirmed) | |
1673 | goto out; | |
1674 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) | |
1675 | flag = NFS4_OPEN_DELEGATE_WRITE; | |
1676 | else | |
1677 | flag = NFS4_OPEN_DELEGATE_READ; | |
1678 | break; | |
1679 | default: | |
1680 | goto out; | |
1681 | } | |
1da177e4 LT |
1682 | |
1683 | dp = alloc_init_deleg(sop->so_client, stp, fh, flag); | |
1684 | if (dp == NULL) { | |
1685 | flag = NFS4_OPEN_DELEGATE_NONE; | |
1686 | goto out; | |
1687 | } | |
1688 | locks_init_lock(&fl); | |
1689 | fl.fl_lmops = &nfsd_lease_mng_ops; | |
1690 | fl.fl_flags = FL_LEASE; | |
9167f501 | 1691 | fl.fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; |
1da177e4 LT |
1692 | fl.fl_end = OFFSET_MAX; |
1693 | fl.fl_owner = (fl_owner_t)dp; | |
1694 | fl.fl_file = stp->st_vfs_file; | |
1695 | fl.fl_pid = current->tgid; | |
1696 | ||
a9933cea | 1697 | /* vfs_setlease checks to see if delegation should be handed out. |
1da177e4 LT |
1698 | * the lock_manager callbacks fl_mylease and fl_change are used |
1699 | */ | |
9167f501 | 1700 | if ((status = vfs_setlease(stp->st_vfs_file, fl.fl_type, &flp))) { |
1da177e4 | 1701 | dprintk("NFSD: setlease failed [%d], no delegation\n", status); |
c907132d | 1702 | unhash_delegation(dp); |
1da177e4 LT |
1703 | flag = NFS4_OPEN_DELEGATE_NONE; |
1704 | goto out; | |
1705 | } | |
1706 | ||
1707 | memcpy(&open->op_delegate_stateid, &dp->dl_stateid, sizeof(dp->dl_stateid)); | |
1708 | ||
1709 | dprintk("NFSD: delegation stateid=(%08x/%08x/%08x/%08x)\n\n", | |
1710 | dp->dl_stateid.si_boot, | |
1711 | dp->dl_stateid.si_stateownerid, | |
1712 | dp->dl_stateid.si_fileid, | |
1713 | dp->dl_stateid.si_generation); | |
1714 | out: | |
7b190fec N |
1715 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS |
1716 | && flag == NFS4_OPEN_DELEGATE_NONE | |
1717 | && open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) | |
2fdada03 | 1718 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); |
1da177e4 LT |
1719 | open->op_delegate_type = flag; |
1720 | } | |
1721 | ||
1722 | /* | |
1723 | * called with nfs4_lock_state() held. | |
1724 | */ | |
b37ad28b | 1725 | __be32 |
1da177e4 LT |
1726 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
1727 | { | |
1728 | struct nfs4_file *fp = NULL; | |
1729 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
1730 | struct nfs4_stateid *stp = NULL; | |
567d9829 | 1731 | struct nfs4_delegation *dp = NULL; |
b37ad28b | 1732 | __be32 status; |
1da177e4 LT |
1733 | |
1734 | status = nfserr_inval; | |
ba5a6a19 BF |
1735 | if (!access_valid(open->op_share_access) |
1736 | || !deny_valid(open->op_share_deny)) | |
1da177e4 LT |
1737 | goto out; |
1738 | /* | |
1739 | * Lookup file; if found, lookup stateid and check open request, | |
1740 | * and check for delegations in the process of being recalled. | |
1741 | * If not found, create the nfs4_file struct | |
1742 | */ | |
1743 | fp = find_file(ino); | |
1744 | if (fp) { | |
1745 | if ((status = nfs4_check_open(fp, open, &stp))) | |
1746 | goto out; | |
c44c5eeb N |
1747 | status = nfs4_check_deleg(fp, open, &dp); |
1748 | if (status) | |
1749 | goto out; | |
1da177e4 | 1750 | } else { |
c44c5eeb N |
1751 | status = nfserr_bad_stateid; |
1752 | if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) | |
1753 | goto out; | |
1da177e4 LT |
1754 | status = nfserr_resource; |
1755 | fp = alloc_init_file(ino); | |
1756 | if (fp == NULL) | |
1757 | goto out; | |
1758 | } | |
1759 | ||
1760 | /* | |
1761 | * OPEN the file, or upgrade an existing OPEN. | |
1762 | * If truncate fails, the OPEN fails. | |
1763 | */ | |
1764 | if (stp) { | |
1765 | /* Stateid was found, this is an OPEN upgrade */ | |
1766 | status = nfs4_upgrade_open(rqstp, current_fh, stp, open); | |
1767 | if (status) | |
1768 | goto out; | |
444c2c07 | 1769 | update_stateid(&stp->st_stateid); |
1da177e4 LT |
1770 | } else { |
1771 | /* Stateid was not found, this is a new OPEN */ | |
1772 | int flags = 0; | |
9ecb6a08 | 1773 | if (open->op_share_access & NFS4_SHARE_ACCESS_READ) |
8837abca | 1774 | flags |= NFSD_MAY_READ; |
1da177e4 | 1775 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) |
8837abca | 1776 | flags |= NFSD_MAY_WRITE; |
567d9829 N |
1777 | status = nfs4_new_open(rqstp, &stp, dp, current_fh, flags); |
1778 | if (status) | |
1da177e4 LT |
1779 | goto out; |
1780 | init_stateid(stp, fp, open); | |
1781 | status = nfsd4_truncate(rqstp, current_fh, open); | |
1782 | if (status) { | |
2283963f | 1783 | release_open_stateid(stp); |
1da177e4 LT |
1784 | goto out; |
1785 | } | |
1786 | } | |
1787 | memcpy(&open->op_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
1788 | ||
1789 | /* | |
1790 | * Attempt to hand out a delegation. No error return, because the | |
1791 | * OPEN succeeds even if we fail. | |
1792 | */ | |
1793 | nfs4_open_delegation(current_fh, open, stp); | |
1794 | ||
1795 | status = nfs_ok; | |
1796 | ||
1797 | dprintk("nfs4_process_open2: stateid=(%08x/%08x/%08x/%08x)\n", | |
1798 | stp->st_stateid.si_boot, stp->st_stateid.si_stateownerid, | |
1799 | stp->st_stateid.si_fileid, stp->st_stateid.si_generation); | |
1800 | out: | |
13cd2184 N |
1801 | if (fp) |
1802 | put_nfs4_file(fp); | |
37515177 N |
1803 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
1804 | nfs4_set_claim_prev(open); | |
1da177e4 LT |
1805 | /* |
1806 | * To finish the open response, we just need to set the rflags. | |
1807 | */ | |
1808 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | |
1809 | if (!open->op_stateowner->so_confirmed) | |
1810 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; | |
1811 | ||
1812 | return status; | |
1813 | } | |
1814 | ||
b37ad28b | 1815 | __be32 |
b591480b BF |
1816 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
1817 | clientid_t *clid) | |
1da177e4 LT |
1818 | { |
1819 | struct nfs4_client *clp; | |
b37ad28b | 1820 | __be32 status; |
1da177e4 LT |
1821 | |
1822 | nfs4_lock_state(); | |
1823 | dprintk("process_renew(%08x/%08x): starting\n", | |
1824 | clid->cl_boot, clid->cl_id); | |
1825 | status = nfserr_stale_clientid; | |
1826 | if (STALE_CLIENTID(clid)) | |
1827 | goto out; | |
1828 | clp = find_confirmed_client(clid); | |
1829 | status = nfserr_expired; | |
1830 | if (clp == NULL) { | |
1831 | /* We assume the client took too long to RENEW. */ | |
1832 | dprintk("nfsd4_renew: clientid not found!\n"); | |
1833 | goto out; | |
1834 | } | |
1835 | renew_client(clp); | |
1836 | status = nfserr_cb_path_down; | |
ea1da636 | 1837 | if (!list_empty(&clp->cl_delegations) |
1da177e4 LT |
1838 | && !atomic_read(&clp->cl_callback.cb_set)) |
1839 | goto out; | |
1840 | status = nfs_ok; | |
1841 | out: | |
1842 | nfs4_unlock_state(); | |
1843 | return status; | |
1844 | } | |
1845 | ||
af558e33 BF |
1846 | struct lock_manager nfsd4_manager = { |
1847 | }; | |
1848 | ||
a76b4319 | 1849 | static void |
af558e33 | 1850 | nfsd4_end_grace(void) |
a76b4319 N |
1851 | { |
1852 | dprintk("NFSD: end of grace period\n"); | |
c7b9a459 | 1853 | nfsd4_recdir_purge_old(); |
af558e33 | 1854 | locks_end_grace(&nfsd4_manager); |
a76b4319 N |
1855 | } |
1856 | ||
fd39ca9a | 1857 | static time_t |
1da177e4 LT |
1858 | nfs4_laundromat(void) |
1859 | { | |
1860 | struct nfs4_client *clp; | |
1861 | struct nfs4_stateowner *sop; | |
1862 | struct nfs4_delegation *dp; | |
1863 | struct list_head *pos, *next, reaplist; | |
1864 | time_t cutoff = get_seconds() - NFSD_LEASE_TIME; | |
1865 | time_t t, clientid_val = NFSD_LEASE_TIME; | |
1866 | time_t u, test_val = NFSD_LEASE_TIME; | |
1867 | ||
1868 | nfs4_lock_state(); | |
1869 | ||
1870 | dprintk("NFSD: laundromat service - starting\n"); | |
af558e33 BF |
1871 | if (locks_in_grace()) |
1872 | nfsd4_end_grace(); | |
1da177e4 LT |
1873 | list_for_each_safe(pos, next, &client_lru) { |
1874 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
1875 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { | |
1876 | t = clp->cl_time - cutoff; | |
1877 | if (clientid_val > t) | |
1878 | clientid_val = t; | |
1879 | break; | |
1880 | } | |
1881 | dprintk("NFSD: purging unused client (clientid %08x)\n", | |
1882 | clp->cl_clientid.cl_id); | |
c7b9a459 | 1883 | nfsd4_remove_clid_dir(clp); |
1da177e4 LT |
1884 | expire_client(clp); |
1885 | } | |
1886 | INIT_LIST_HEAD(&reaplist); | |
1887 | spin_lock(&recall_lock); | |
1888 | list_for_each_safe(pos, next, &del_recall_lru) { | |
1889 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
1890 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { | |
1891 | u = dp->dl_time - cutoff; | |
1892 | if (test_val > u) | |
1893 | test_val = u; | |
1894 | break; | |
1895 | } | |
1896 | dprintk("NFSD: purging unused delegation dp %p, fp %p\n", | |
1897 | dp, dp->dl_flock); | |
1898 | list_move(&dp->dl_recall_lru, &reaplist); | |
1899 | } | |
1900 | spin_unlock(&recall_lock); | |
1901 | list_for_each_safe(pos, next, &reaplist) { | |
1902 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
1903 | list_del_init(&dp->dl_recall_lru); | |
1904 | unhash_delegation(dp); | |
1905 | } | |
1906 | test_val = NFSD_LEASE_TIME; | |
1907 | list_for_each_safe(pos, next, &close_lru) { | |
1908 | sop = list_entry(pos, struct nfs4_stateowner, so_close_lru); | |
1909 | if (time_after((unsigned long)sop->so_time, (unsigned long)cutoff)) { | |
1910 | u = sop->so_time - cutoff; | |
1911 | if (test_val > u) | |
1912 | test_val = u; | |
1913 | break; | |
1914 | } | |
1915 | dprintk("NFSD: purging unused open stateowner (so_id %d)\n", | |
1916 | sop->so_id); | |
f044ff83 | 1917 | release_openowner(sop); |
1da177e4 LT |
1918 | } |
1919 | if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) | |
1920 | clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; | |
1921 | nfs4_unlock_state(); | |
1922 | return clientid_val; | |
1923 | } | |
1924 | ||
a254b246 HH |
1925 | static struct workqueue_struct *laundry_wq; |
1926 | static void laundromat_main(struct work_struct *); | |
1927 | static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main); | |
1928 | ||
1929 | static void | |
c4028958 | 1930 | laundromat_main(struct work_struct *not_used) |
1da177e4 LT |
1931 | { |
1932 | time_t t; | |
1933 | ||
1934 | t = nfs4_laundromat(); | |
1935 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); | |
58da282b | 1936 | queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); |
1da177e4 LT |
1937 | } |
1938 | ||
fd39ca9a | 1939 | static struct nfs4_stateowner * |
f8816512 N |
1940 | search_close_lru(u32 st_id, int flags) |
1941 | { | |
1da177e4 LT |
1942 | struct nfs4_stateowner *local = NULL; |
1943 | ||
1da177e4 LT |
1944 | if (flags & CLOSE_STATE) { |
1945 | list_for_each_entry(local, &close_lru, so_close_lru) { | |
1946 | if (local->so_id == st_id) | |
1947 | return local; | |
1948 | } | |
1949 | } | |
1950 | return NULL; | |
1951 | } | |
1952 | ||
1953 | static inline int | |
1954 | nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stateid *stp) | |
1955 | { | |
7eaa36e2 | 1956 | return fhp->fh_dentry->d_inode != stp->st_vfs_file->f_path.dentry->d_inode; |
1da177e4 LT |
1957 | } |
1958 | ||
1959 | static int | |
1960 | STALE_STATEID(stateid_t *stateid) | |
1961 | { | |
1962 | if (stateid->si_boot == boot_time) | |
1963 | return 0; | |
849823c5 | 1964 | dprintk("NFSD: stale stateid (%08x/%08x/%08x/%08x)!\n", |
1da177e4 LT |
1965 | stateid->si_boot, stateid->si_stateownerid, stateid->si_fileid, |
1966 | stateid->si_generation); | |
1967 | return 1; | |
1968 | } | |
1969 | ||
1970 | static inline int | |
1971 | access_permit_read(unsigned long access_bmap) | |
1972 | { | |
1973 | return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) || | |
1974 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) || | |
1975 | test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap); | |
1976 | } | |
1977 | ||
1978 | static inline int | |
1979 | access_permit_write(unsigned long access_bmap) | |
1980 | { | |
1981 | return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) || | |
1982 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap); | |
1983 | } | |
1984 | ||
1985 | static | |
b37ad28b | 1986 | __be32 nfs4_check_openmode(struct nfs4_stateid *stp, int flags) |
1da177e4 | 1987 | { |
b37ad28b | 1988 | __be32 status = nfserr_openmode; |
1da177e4 LT |
1989 | |
1990 | if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap))) | |
1991 | goto out; | |
1992 | if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap))) | |
1993 | goto out; | |
1994 | status = nfs_ok; | |
1995 | out: | |
1996 | return status; | |
1997 | } | |
1998 | ||
b37ad28b | 1999 | static inline __be32 |
1da177e4 LT |
2000 | check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags) |
2001 | { | |
203a8c8e | 2002 | if (ONE_STATEID(stateid) && (flags & RD_STATE)) |
1da177e4 | 2003 | return nfs_ok; |
af558e33 | 2004 | else if (locks_in_grace()) { |
1da177e4 LT |
2005 | /* Answer in remaining cases depends on existance of |
2006 | * conflicting state; so we must wait out the grace period. */ | |
2007 | return nfserr_grace; | |
2008 | } else if (flags & WR_STATE) | |
2009 | return nfs4_share_conflict(current_fh, | |
2010 | NFS4_SHARE_DENY_WRITE); | |
2011 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ | |
2012 | return nfs4_share_conflict(current_fh, | |
2013 | NFS4_SHARE_DENY_READ); | |
2014 | } | |
2015 | ||
2016 | /* | |
2017 | * Allow READ/WRITE during grace period on recovered state only for files | |
2018 | * that are not able to provide mandatory locking. | |
2019 | */ | |
2020 | static inline int | |
18f82731 | 2021 | grace_disallows_io(struct inode *inode) |
1da177e4 | 2022 | { |
203a8c8e | 2023 | return locks_in_grace() && mandatory_lock(inode); |
1da177e4 LT |
2024 | } |
2025 | ||
0836f587 BF |
2026 | static int check_stateid_generation(stateid_t *in, stateid_t *ref) |
2027 | { | |
2028 | /* If the client sends us a stateid from the future, it's buggy: */ | |
2029 | if (in->si_generation > ref->si_generation) | |
2030 | return nfserr_bad_stateid; | |
2031 | /* | |
2032 | * The following, however, can happen. For example, if the | |
2033 | * client sends an open and some IO at the same time, the open | |
2034 | * may bump si_generation while the IO is still in flight. | |
2035 | * Thanks to hard links and renames, the client never knows what | |
2036 | * file an open will affect. So it could avoid that situation | |
2037 | * only by serializing all opens and IO from the same open | |
2038 | * owner. To recover from the old_stateid error, the client | |
2039 | * will just have to retry the IO: | |
2040 | */ | |
2041 | if (in->si_generation < ref->si_generation) | |
2042 | return nfserr_old_stateid; | |
2043 | return nfs_ok; | |
2044 | } | |
2045 | ||
3e633079 BF |
2046 | static int is_delegation_stateid(stateid_t *stateid) |
2047 | { | |
2048 | return stateid->si_fileid == 0; | |
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; | |
1da177e4 | 2059 | struct inode *ino = current_fh->fh_dentry->d_inode; |
b37ad28b | 2060 | __be32 status; |
1da177e4 | 2061 | |
1da177e4 LT |
2062 | if (filpp) |
2063 | *filpp = NULL; | |
2064 | ||
18f82731 | 2065 | if (grace_disallows_io(ino)) |
1da177e4 LT |
2066 | return nfserr_grace; |
2067 | ||
2068 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
2069 | return check_special_stateids(current_fh, stateid, flags); | |
2070 | ||
1da177e4 LT |
2071 | status = nfserr_stale_stateid; |
2072 | if (STALE_STATEID(stateid)) | |
2073 | goto out; | |
2074 | ||
1da177e4 | 2075 | status = nfserr_bad_stateid; |
3e633079 | 2076 | if (is_delegation_stateid(stateid)) { |
a4455be0 | 2077 | dp = find_delegation_stateid(ino, stateid); |
819a8f53 | 2078 | if (!dp) |
1da177e4 | 2079 | goto out; |
fd03b099 | 2080 | status = check_stateid_generation(stateid, &dp->dl_stateid); |
0c2a498f BF |
2081 | if (status) |
2082 | goto out; | |
dc9bf700 BF |
2083 | status = nfs4_check_delegmode(dp, flags); |
2084 | if (status) | |
2085 | goto out; | |
2086 | renew_client(dp->dl_client); | |
dc9bf700 BF |
2087 | if (filpp) |
2088 | *filpp = dp->dl_vfs_file; | |
1da177e4 | 2089 | } else { /* open or lock stateid */ |
a4455be0 | 2090 | stp = find_stateid(stateid, flags); |
819a8f53 | 2091 | if (!stp) |
1da177e4 | 2092 | goto out; |
6150ef0d | 2093 | if (nfs4_check_fh(current_fh, stp)) |
1da177e4 LT |
2094 | goto out; |
2095 | if (!stp->st_stateowner->so_confirmed) | |
2096 | goto out; | |
fd03b099 | 2097 | status = check_stateid_generation(stateid, &stp->st_stateid); |
0c2a498f BF |
2098 | if (status) |
2099 | goto out; | |
a4455be0 BF |
2100 | status = nfs4_check_openmode(stp, flags); |
2101 | if (status) | |
1da177e4 LT |
2102 | goto out; |
2103 | renew_client(stp->st_stateowner->so_client); | |
2104 | if (filpp) | |
2105 | *filpp = stp->st_vfs_file; | |
1da177e4 LT |
2106 | } |
2107 | status = nfs_ok; | |
2108 | out: | |
2109 | return status; | |
2110 | } | |
2111 | ||
4c4cd222 N |
2112 | static inline int |
2113 | setlkflg (int type) | |
2114 | { | |
2115 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? | |
2116 | RD_STATE : WR_STATE; | |
2117 | } | |
1da177e4 LT |
2118 | |
2119 | /* | |
2120 | * Checks for sequence id mutating operations. | |
2121 | */ | |
b37ad28b | 2122 | static __be32 |
4c4cd222 | 2123 | 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 | 2124 | { |
1da177e4 LT |
2125 | struct nfs4_stateid *stp; |
2126 | struct nfs4_stateowner *sop; | |
0836f587 | 2127 | __be32 status; |
1da177e4 LT |
2128 | |
2129 | dprintk("NFSD: preprocess_seqid_op: seqid=%d " | |
2130 | "stateid = (%08x/%08x/%08x/%08x)\n", seqid, | |
2131 | stateid->si_boot, stateid->si_stateownerid, stateid->si_fileid, | |
2132 | stateid->si_generation); | |
3a4f98bb | 2133 | |
1da177e4 LT |
2134 | *stpp = NULL; |
2135 | *sopp = NULL; | |
2136 | ||
1da177e4 | 2137 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) { |
2fdada03 | 2138 | dprintk("NFSD: preprocess_seqid_op: magic stateid!\n"); |
3a4f98bb | 2139 | return nfserr_bad_stateid; |
1da177e4 LT |
2140 | } |
2141 | ||
1da177e4 | 2142 | if (STALE_STATEID(stateid)) |
3a4f98bb | 2143 | return nfserr_stale_stateid; |
1da177e4 LT |
2144 | /* |
2145 | * We return BAD_STATEID if filehandle doesn't match stateid, | |
2146 | * the confirmed flag is incorrecly set, or the generation | |
2147 | * number is incorrect. | |
1da177e4 | 2148 | */ |
f8816512 N |
2149 | stp = find_stateid(stateid, flags); |
2150 | if (stp == NULL) { | |
2151 | /* | |
2152 | * Also, we should make sure this isn't just the result of | |
2153 | * a replayed close: | |
2154 | */ | |
2155 | sop = search_close_lru(stateid->si_stateownerid, flags); | |
2156 | if (sop == NULL) | |
2157 | return nfserr_bad_stateid; | |
2158 | *sopp = sop; | |
2159 | goto check_replay; | |
2160 | } | |
1da177e4 | 2161 | |
39325bd0 BF |
2162 | *stpp = stp; |
2163 | *sopp = sop = stp->st_stateowner; | |
2164 | ||
4c4cd222 | 2165 | if (lock) { |
4c4cd222 | 2166 | clientid_t *lockclid = &lock->v.new.clientid; |
1da177e4 | 2167 | struct nfs4_client *clp = sop->so_client; |
4c4cd222 | 2168 | int lkflg = 0; |
b37ad28b | 2169 | __be32 status; |
4c4cd222 N |
2170 | |
2171 | lkflg = setlkflg(lock->lk_type); | |
2172 | ||
2173 | if (lock->lk_is_new) { | |
599e0a22 BF |
2174 | if (!sop->so_is_open_owner) |
2175 | return nfserr_bad_stateid; | |
2176 | if (!same_clid(&clp->cl_clientid, lockclid)) | |
4c4cd222 | 2177 | return nfserr_bad_stateid; |
599e0a22 BF |
2178 | /* stp is the open stateid */ |
2179 | status = nfs4_check_openmode(stp, lkflg); | |
2180 | if (status) | |
2181 | return status; | |
2182 | } else { | |
2183 | /* stp is the lock stateid */ | |
2184 | status = nfs4_check_openmode(stp->st_openstp, lkflg); | |
2185 | if (status) | |
2186 | return status; | |
4c4cd222 | 2187 | } |
1da177e4 LT |
2188 | } |
2189 | ||
f3362737 | 2190 | if (nfs4_check_fh(current_fh, stp)) { |
2fdada03 | 2191 | dprintk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n"); |
3a4f98bb | 2192 | return nfserr_bad_stateid; |
1da177e4 LT |
2193 | } |
2194 | ||
1da177e4 LT |
2195 | /* |
2196 | * We now validate the seqid and stateid generation numbers. | |
2197 | * For the moment, we ignore the possibility of | |
2198 | * generation number wraparound. | |
2199 | */ | |
bd9aac52 | 2200 | if (seqid != sop->so_seqid) |
1da177e4 LT |
2201 | goto check_replay; |
2202 | ||
3a4f98bb | 2203 | if (sop->so_confirmed && flags & CONFIRM) { |
2fdada03 | 2204 | dprintk("NFSD: preprocess_seqid_op: expected" |
3a4f98bb N |
2205 | " unconfirmed stateowner!\n"); |
2206 | return nfserr_bad_stateid; | |
1da177e4 | 2207 | } |
3a4f98bb | 2208 | if (!sop->so_confirmed && !(flags & CONFIRM)) { |
2fdada03 | 2209 | dprintk("NFSD: preprocess_seqid_op: stateowner not" |
3a4f98bb N |
2210 | " confirmed yet!\n"); |
2211 | return nfserr_bad_stateid; | |
1da177e4 | 2212 | } |
0836f587 BF |
2213 | status = check_stateid_generation(stateid, &stp->st_stateid); |
2214 | if (status) | |
2215 | return status; | |
52fd004e | 2216 | renew_client(sop->so_client); |
3a4f98bb | 2217 | return nfs_ok; |
1da177e4 | 2218 | |
1da177e4 | 2219 | check_replay: |
bd9aac52 | 2220 | if (seqid == sop->so_seqid - 1) { |
849823c5 | 2221 | dprintk("NFSD: preprocess_seqid_op: retransmission?\n"); |
1da177e4 | 2222 | /* indicate replay to calling function */ |
a90b061c | 2223 | return nfserr_replay_me; |
1da177e4 | 2224 | } |
2fdada03 | 2225 | dprintk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d)\n", |
3a4f98bb N |
2226 | sop->so_seqid, seqid); |
2227 | *sopp = NULL; | |
2228 | return nfserr_bad_seqid; | |
1da177e4 LT |
2229 | } |
2230 | ||
b37ad28b | 2231 | __be32 |
ca364317 | 2232 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 2233 | struct nfsd4_open_confirm *oc) |
1da177e4 | 2234 | { |
b37ad28b | 2235 | __be32 status; |
1da177e4 LT |
2236 | struct nfs4_stateowner *sop; |
2237 | struct nfs4_stateid *stp; | |
2238 | ||
2239 | dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", | |
ca364317 BF |
2240 | (int)cstate->current_fh.fh_dentry->d_name.len, |
2241 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 2242 | |
ca364317 | 2243 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
a8cddc5d BF |
2244 | if (status) |
2245 | return status; | |
1da177e4 LT |
2246 | |
2247 | nfs4_lock_state(); | |
2248 | ||
ca364317 BF |
2249 | if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh, |
2250 | oc->oc_seqid, &oc->oc_req_stateid, | |
f3362737 | 2251 | CONFIRM | OPEN_STATE, |
1da177e4 LT |
2252 | &oc->oc_stateowner, &stp, NULL))) |
2253 | goto out; | |
2254 | ||
2255 | sop = oc->oc_stateowner; | |
2256 | sop->so_confirmed = 1; | |
2257 | update_stateid(&stp->st_stateid); | |
2258 | memcpy(&oc->oc_resp_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
2259 | dprintk("NFSD: nfsd4_open_confirm: success, seqid=%d " | |
2260 | "stateid=(%08x/%08x/%08x/%08x)\n", oc->oc_seqid, | |
2261 | stp->st_stateid.si_boot, | |
2262 | stp->st_stateid.si_stateownerid, | |
2263 | stp->st_stateid.si_fileid, | |
2264 | stp->st_stateid.si_generation); | |
c7b9a459 N |
2265 | |
2266 | nfsd4_create_clid_dir(sop->so_client); | |
1da177e4 | 2267 | out: |
f2327d9a | 2268 | if (oc->oc_stateowner) { |
1da177e4 | 2269 | nfs4_get_stateowner(oc->oc_stateowner); |
a4f1706a | 2270 | cstate->replay_owner = oc->oc_stateowner; |
f2327d9a | 2271 | } |
1da177e4 LT |
2272 | nfs4_unlock_state(); |
2273 | return status; | |
2274 | } | |
2275 | ||
2276 | ||
2277 | /* | |
2278 | * unset all bits in union bitmap (bmap) that | |
2279 | * do not exist in share (from successful OPEN_DOWNGRADE) | |
2280 | */ | |
2281 | static void | |
2282 | reset_union_bmap_access(unsigned long access, unsigned long *bmap) | |
2283 | { | |
2284 | int i; | |
2285 | for (i = 1; i < 4; i++) { | |
2286 | if ((i & access) != i) | |
2287 | __clear_bit(i, bmap); | |
2288 | } | |
2289 | } | |
2290 | ||
2291 | static void | |
2292 | reset_union_bmap_deny(unsigned long deny, unsigned long *bmap) | |
2293 | { | |
2294 | int i; | |
2295 | for (i = 0; i < 4; i++) { | |
2296 | if ((i & deny) != i) | |
2297 | __clear_bit(i, bmap); | |
2298 | } | |
2299 | } | |
2300 | ||
b37ad28b | 2301 | __be32 |
ca364317 BF |
2302 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
2303 | struct nfsd4_compound_state *cstate, | |
a4f1706a | 2304 | struct nfsd4_open_downgrade *od) |
1da177e4 | 2305 | { |
b37ad28b | 2306 | __be32 status; |
1da177e4 LT |
2307 | struct nfs4_stateid *stp; |
2308 | unsigned int share_access; | |
2309 | ||
2310 | dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", | |
ca364317 BF |
2311 | (int)cstate->current_fh.fh_dentry->d_name.len, |
2312 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 2313 | |
ba5a6a19 BF |
2314 | if (!access_valid(od->od_share_access) |
2315 | || !deny_valid(od->od_share_deny)) | |
1da177e4 LT |
2316 | return nfserr_inval; |
2317 | ||
2318 | nfs4_lock_state(); | |
ca364317 BF |
2319 | if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh, |
2320 | od->od_seqid, | |
1da177e4 | 2321 | &od->od_stateid, |
f3362737 | 2322 | OPEN_STATE, |
1da177e4 LT |
2323 | &od->od_stateowner, &stp, NULL))) |
2324 | goto out; | |
2325 | ||
2326 | status = nfserr_inval; | |
2327 | if (!test_bit(od->od_share_access, &stp->st_access_bmap)) { | |
2328 | dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n", | |
2329 | stp->st_access_bmap, od->od_share_access); | |
2330 | goto out; | |
2331 | } | |
2332 | if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) { | |
2333 | dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", | |
2334 | stp->st_deny_bmap, od->od_share_deny); | |
2335 | goto out; | |
2336 | } | |
2337 | set_access(&share_access, stp->st_access_bmap); | |
2338 | nfs4_file_downgrade(stp->st_vfs_file, | |
2339 | share_access & ~od->od_share_access); | |
2340 | ||
2341 | reset_union_bmap_access(od->od_share_access, &stp->st_access_bmap); | |
2342 | reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap); | |
2343 | ||
2344 | update_stateid(&stp->st_stateid); | |
2345 | memcpy(&od->od_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
2346 | status = nfs_ok; | |
2347 | out: | |
f2327d9a | 2348 | if (od->od_stateowner) { |
1da177e4 | 2349 | nfs4_get_stateowner(od->od_stateowner); |
a4f1706a | 2350 | cstate->replay_owner = od->od_stateowner; |
f2327d9a | 2351 | } |
1da177e4 LT |
2352 | nfs4_unlock_state(); |
2353 | return status; | |
2354 | } | |
2355 | ||
2356 | /* | |
2357 | * nfs4_unlock_state() called after encode | |
2358 | */ | |
b37ad28b | 2359 | __be32 |
ca364317 | 2360 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 2361 | struct nfsd4_close *close) |
1da177e4 | 2362 | { |
b37ad28b | 2363 | __be32 status; |
1da177e4 LT |
2364 | struct nfs4_stateid *stp; |
2365 | ||
2366 | dprintk("NFSD: nfsd4_close on file %.*s\n", | |
ca364317 BF |
2367 | (int)cstate->current_fh.fh_dentry->d_name.len, |
2368 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 LT |
2369 | |
2370 | nfs4_lock_state(); | |
2371 | /* check close_lru for replay */ | |
ca364317 BF |
2372 | if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh, |
2373 | close->cl_seqid, | |
1da177e4 | 2374 | &close->cl_stateid, |
f3362737 | 2375 | OPEN_STATE | CLOSE_STATE, |
1da177e4 LT |
2376 | &close->cl_stateowner, &stp, NULL))) |
2377 | goto out; | |
1da177e4 LT |
2378 | status = nfs_ok; |
2379 | update_stateid(&stp->st_stateid); | |
2380 | memcpy(&close->cl_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
2381 | ||
04ef5954 | 2382 | /* release_stateid() calls nfsd_close() if needed */ |
2283963f | 2383 | release_open_stateid(stp); |
04ef5954 BF |
2384 | |
2385 | /* place unused nfs4_stateowners on so_close_lru list to be | |
2386 | * released by the laundromat service after the lease period | |
2387 | * to enable us to handle CLOSE replay | |
2388 | */ | |
2389 | if (list_empty(&close->cl_stateowner->so_stateids)) | |
2390 | move_to_close_lru(close->cl_stateowner); | |
1da177e4 | 2391 | out: |
f2327d9a | 2392 | if (close->cl_stateowner) { |
1da177e4 | 2393 | nfs4_get_stateowner(close->cl_stateowner); |
a4f1706a | 2394 | cstate->replay_owner = close->cl_stateowner; |
f2327d9a | 2395 | } |
1da177e4 LT |
2396 | nfs4_unlock_state(); |
2397 | return status; | |
2398 | } | |
2399 | ||
b37ad28b | 2400 | __be32 |
ca364317 BF |
2401 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
2402 | struct nfsd4_delegreturn *dr) | |
1da177e4 | 2403 | { |
203a8c8e BF |
2404 | struct nfs4_delegation *dp; |
2405 | stateid_t *stateid = &dr->dr_stateid; | |
2406 | struct inode *inode; | |
b37ad28b | 2407 | __be32 status; |
1da177e4 | 2408 | |
ca364317 | 2409 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
203a8c8e BF |
2410 | return status; |
2411 | inode = cstate->current_fh.fh_dentry->d_inode; | |
1da177e4 LT |
2412 | |
2413 | nfs4_lock_state(); | |
203a8c8e BF |
2414 | status = nfserr_bad_stateid; |
2415 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
2416 | goto out; | |
2417 | status = nfserr_stale_stateid; | |
2418 | if (STALE_STATEID(stateid)) | |
2419 | goto out; | |
7e0f7cf5 | 2420 | status = nfserr_bad_stateid; |
203a8c8e BF |
2421 | if (!is_delegation_stateid(stateid)) |
2422 | goto out; | |
203a8c8e BF |
2423 | dp = find_delegation_stateid(inode, stateid); |
2424 | if (!dp) | |
2425 | goto out; | |
2426 | status = check_stateid_generation(stateid, &dp->dl_stateid); | |
2427 | if (status) | |
2428 | goto out; | |
2429 | renew_client(dp->dl_client); | |
2430 | ||
2431 | unhash_delegation(dp); | |
1da177e4 | 2432 | out: |
203a8c8e BF |
2433 | nfs4_unlock_state(); |
2434 | ||
1da177e4 LT |
2435 | return status; |
2436 | } | |
2437 | ||
2438 | ||
2439 | /* | |
2440 | * Lock owner state (byte-range locks) | |
2441 | */ | |
2442 | #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) | |
2443 | #define LOCK_HASH_BITS 8 | |
2444 | #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS) | |
2445 | #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1) | |
2446 | ||
87df4de8 BH |
2447 | static inline u64 |
2448 | end_offset(u64 start, u64 len) | |
2449 | { | |
2450 | u64 end; | |
2451 | ||
2452 | end = start + len; | |
2453 | return end >= start ? end: NFS4_MAX_UINT64; | |
2454 | } | |
2455 | ||
2456 | /* last octet in a range */ | |
2457 | static inline u64 | |
2458 | last_byte_offset(u64 start, u64 len) | |
2459 | { | |
2460 | u64 end; | |
2461 | ||
2462 | BUG_ON(!len); | |
2463 | end = start + len; | |
2464 | return end > start ? end - 1: NFS4_MAX_UINT64; | |
2465 | } | |
2466 | ||
1da177e4 LT |
2467 | #define lockownerid_hashval(id) \ |
2468 | ((id) & LOCK_HASH_MASK) | |
2469 | ||
2470 | static inline unsigned int | |
2471 | lock_ownerstr_hashval(struct inode *inode, u32 cl_id, | |
2472 | struct xdr_netobj *ownername) | |
2473 | { | |
2474 | return (file_hashval(inode) + cl_id | |
2475 | + opaque_hashval(ownername->data, ownername->len)) | |
2476 | & LOCK_HASH_MASK; | |
2477 | } | |
2478 | ||
2479 | static struct list_head lock_ownerid_hashtbl[LOCK_HASH_SIZE]; | |
2480 | static struct list_head lock_ownerstr_hashtbl[LOCK_HASH_SIZE]; | |
2481 | static struct list_head lockstateid_hashtbl[STATEID_HASH_SIZE]; | |
2482 | ||
fd39ca9a | 2483 | static struct nfs4_stateid * |
1da177e4 LT |
2484 | find_stateid(stateid_t *stid, int flags) |
2485 | { | |
9346eff0 | 2486 | struct nfs4_stateid *local; |
1da177e4 LT |
2487 | u32 st_id = stid->si_stateownerid; |
2488 | u32 f_id = stid->si_fileid; | |
2489 | unsigned int hashval; | |
2490 | ||
2491 | dprintk("NFSD: find_stateid flags 0x%x\n",flags); | |
9346eff0 | 2492 | if (flags & (LOCK_STATE | RD_STATE | WR_STATE)) { |
1da177e4 LT |
2493 | hashval = stateid_hashval(st_id, f_id); |
2494 | list_for_each_entry(local, &lockstateid_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 | } | |
2499 | } | |
9346eff0 KK |
2500 | |
2501 | if (flags & (OPEN_STATE | RD_STATE | WR_STATE)) { | |
1da177e4 LT |
2502 | hashval = stateid_hashval(st_id, f_id); |
2503 | list_for_each_entry(local, &stateid_hashtbl[hashval], st_hash) { | |
2504 | if ((local->st_stateid.si_stateownerid == st_id) && | |
2505 | (local->st_stateid.si_fileid == f_id)) | |
2506 | return local; | |
2507 | } | |
849823c5 | 2508 | } |
1da177e4 LT |
2509 | return NULL; |
2510 | } | |
2511 | ||
2512 | static struct nfs4_delegation * | |
2513 | find_delegation_stateid(struct inode *ino, stateid_t *stid) | |
2514 | { | |
13cd2184 N |
2515 | struct nfs4_file *fp; |
2516 | struct nfs4_delegation *dl; | |
1da177e4 LT |
2517 | |
2518 | dprintk("NFSD:find_delegation_stateid stateid=(%08x/%08x/%08x/%08x)\n", | |
2519 | stid->si_boot, stid->si_stateownerid, | |
2520 | stid->si_fileid, stid->si_generation); | |
2521 | ||
1da177e4 | 2522 | fp = find_file(ino); |
13cd2184 N |
2523 | if (!fp) |
2524 | return NULL; | |
2525 | dl = find_delegation_file(fp, stid); | |
2526 | put_nfs4_file(fp); | |
2527 | return dl; | |
1da177e4 LT |
2528 | } |
2529 | ||
2530 | /* | |
2531 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | |
2532 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | |
2533 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | |
2534 | * locking, this prevents us from being completely protocol-compliant. The | |
2535 | * real solution to this problem is to start using unsigned file offsets in | |
2536 | * the VFS, but this is a very deep change! | |
2537 | */ | |
2538 | static inline void | |
2539 | nfs4_transform_lock_offset(struct file_lock *lock) | |
2540 | { | |
2541 | if (lock->fl_start < 0) | |
2542 | lock->fl_start = OFFSET_MAX; | |
2543 | if (lock->fl_end < 0) | |
2544 | lock->fl_end = OFFSET_MAX; | |
2545 | } | |
2546 | ||
d5b9026a N |
2547 | /* Hack!: For now, we're defining this just so we can use a pointer to it |
2548 | * as a unique cookie to identify our (NFSv4's) posix locks. */ | |
e465a77f | 2549 | static struct lock_manager_operations nfsd_posix_mng_ops = { |
d5b9026a | 2550 | }; |
1da177e4 LT |
2551 | |
2552 | static inline void | |
2553 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | |
2554 | { | |
d5b9026a N |
2555 | struct nfs4_stateowner *sop; |
2556 | unsigned int hval; | |
1da177e4 | 2557 | |
d5b9026a N |
2558 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
2559 | sop = (struct nfs4_stateowner *) fl->fl_owner; | |
2560 | hval = lockownerid_hashval(sop->so_id); | |
1da177e4 LT |
2561 | kref_get(&sop->so_ref); |
2562 | deny->ld_sop = sop; | |
2563 | deny->ld_clientid = sop->so_client->cl_clientid; | |
d5b9026a N |
2564 | } else { |
2565 | deny->ld_sop = NULL; | |
2566 | deny->ld_clientid.cl_boot = 0; | |
2567 | deny->ld_clientid.cl_id = 0; | |
1da177e4 LT |
2568 | } |
2569 | deny->ld_start = fl->fl_start; | |
87df4de8 BH |
2570 | deny->ld_length = NFS4_MAX_UINT64; |
2571 | if (fl->fl_end != NFS4_MAX_UINT64) | |
1da177e4 LT |
2572 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
2573 | deny->ld_type = NFS4_READ_LT; | |
2574 | if (fl->fl_type != F_RDLCK) | |
2575 | deny->ld_type = NFS4_WRITE_LT; | |
2576 | } | |
2577 | ||
1da177e4 LT |
2578 | static struct nfs4_stateowner * |
2579 | find_lockstateowner_str(struct inode *inode, clientid_t *clid, | |
2580 | struct xdr_netobj *owner) | |
2581 | { | |
2582 | unsigned int hashval = lock_ownerstr_hashval(inode, clid->cl_id, owner); | |
2583 | struct nfs4_stateowner *op; | |
2584 | ||
2585 | list_for_each_entry(op, &lock_ownerstr_hashtbl[hashval], so_strhash) { | |
599e0a22 | 2586 | if (same_owner_str(op, owner, clid)) |
1da177e4 LT |
2587 | return op; |
2588 | } | |
2589 | return NULL; | |
2590 | } | |
2591 | ||
2592 | /* | |
2593 | * Alloc a lock owner structure. | |
2594 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | |
2595 | * occured. | |
2596 | * | |
2597 | * strhashval = lock_ownerstr_hashval | |
1da177e4 LT |
2598 | */ |
2599 | ||
2600 | static struct nfs4_stateowner * | |
2601 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_stateid *open_stp, struct nfsd4_lock *lock) { | |
2602 | struct nfs4_stateowner *sop; | |
2603 | struct nfs4_replay *rp; | |
2604 | unsigned int idhashval; | |
2605 | ||
2606 | if (!(sop = alloc_stateowner(&lock->lk_new_owner))) | |
2607 | return NULL; | |
2608 | idhashval = lockownerid_hashval(current_ownerid); | |
2609 | INIT_LIST_HEAD(&sop->so_idhash); | |
2610 | INIT_LIST_HEAD(&sop->so_strhash); | |
2611 | INIT_LIST_HEAD(&sop->so_perclient); | |
ea1da636 N |
2612 | INIT_LIST_HEAD(&sop->so_stateids); |
2613 | INIT_LIST_HEAD(&sop->so_perstateid); | |
1da177e4 LT |
2614 | INIT_LIST_HEAD(&sop->so_close_lru); /* not used */ |
2615 | sop->so_time = 0; | |
2616 | list_add(&sop->so_idhash, &lock_ownerid_hashtbl[idhashval]); | |
2617 | list_add(&sop->so_strhash, &lock_ownerstr_hashtbl[strhashval]); | |
ea1da636 | 2618 | list_add(&sop->so_perstateid, &open_stp->st_lockowners); |
1da177e4 LT |
2619 | sop->so_is_open_owner = 0; |
2620 | sop->so_id = current_ownerid++; | |
2621 | sop->so_client = clp; | |
b59e3c0e NB |
2622 | /* It is the openowner seqid that will be incremented in encode in the |
2623 | * case of new lockowners; so increment the lock seqid manually: */ | |
2624 | sop->so_seqid = lock->lk_new_lock_seqid + 1; | |
1da177e4 LT |
2625 | sop->so_confirmed = 1; |
2626 | rp = &sop->so_replay; | |
de1ae286 | 2627 | rp->rp_status = nfserr_serverfault; |
1da177e4 LT |
2628 | rp->rp_buflen = 0; |
2629 | rp->rp_buf = rp->rp_ibuf; | |
2630 | return sop; | |
2631 | } | |
2632 | ||
fd39ca9a | 2633 | static struct nfs4_stateid * |
1da177e4 LT |
2634 | alloc_init_lock_stateid(struct nfs4_stateowner *sop, struct nfs4_file *fp, struct nfs4_stateid *open_stp) |
2635 | { | |
2636 | struct nfs4_stateid *stp; | |
2637 | unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); | |
2638 | ||
5ac049ac N |
2639 | stp = nfs4_alloc_stateid(); |
2640 | if (stp == NULL) | |
1da177e4 LT |
2641 | goto out; |
2642 | INIT_LIST_HEAD(&stp->st_hash); | |
2643 | INIT_LIST_HEAD(&stp->st_perfile); | |
ea1da636 N |
2644 | INIT_LIST_HEAD(&stp->st_perstateowner); |
2645 | INIT_LIST_HEAD(&stp->st_lockowners); /* not used */ | |
1da177e4 | 2646 | list_add(&stp->st_hash, &lockstateid_hashtbl[hashval]); |
8beefa24 | 2647 | list_add(&stp->st_perfile, &fp->fi_stateids); |
ea1da636 | 2648 | list_add(&stp->st_perstateowner, &sop->so_stateids); |
1da177e4 | 2649 | stp->st_stateowner = sop; |
13cd2184 | 2650 | get_nfs4_file(fp); |
1da177e4 LT |
2651 | stp->st_file = fp; |
2652 | stp->st_stateid.si_boot = boot_time; | |
2653 | stp->st_stateid.si_stateownerid = sop->so_id; | |
2654 | stp->st_stateid.si_fileid = fp->fi_id; | |
2655 | stp->st_stateid.si_generation = 0; | |
2656 | stp->st_vfs_file = open_stp->st_vfs_file; /* FIXME refcount?? */ | |
2657 | stp->st_access_bmap = open_stp->st_access_bmap; | |
2658 | stp->st_deny_bmap = open_stp->st_deny_bmap; | |
4c4cd222 | 2659 | stp->st_openstp = open_stp; |
1da177e4 LT |
2660 | |
2661 | out: | |
2662 | return stp; | |
2663 | } | |
2664 | ||
fd39ca9a | 2665 | static int |
1da177e4 LT |
2666 | check_lock_length(u64 offset, u64 length) |
2667 | { | |
87df4de8 | 2668 | return ((length == 0) || ((length != NFS4_MAX_UINT64) && |
1da177e4 LT |
2669 | LOFF_OVERFLOW(offset, length))); |
2670 | } | |
2671 | ||
2672 | /* | |
2673 | * LOCK operation | |
2674 | */ | |
b37ad28b | 2675 | __be32 |
ca364317 | 2676 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 2677 | struct nfsd4_lock *lock) |
1da177e4 | 2678 | { |
3e9e3dbe | 2679 | struct nfs4_stateowner *open_sop = NULL; |
b59e3c0e | 2680 | struct nfs4_stateowner *lock_sop = NULL; |
1da177e4 LT |
2681 | struct nfs4_stateid *lock_stp; |
2682 | struct file *filp; | |
2683 | struct file_lock file_lock; | |
8dc7c311 | 2684 | struct file_lock conflock; |
b37ad28b | 2685 | __be32 status = 0; |
1da177e4 | 2686 | unsigned int strhashval; |
150b3934 | 2687 | unsigned int cmd; |
b8dd7b9a | 2688 | int err; |
1da177e4 LT |
2689 | |
2690 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | |
2691 | (long long) lock->lk_offset, | |
2692 | (long long) lock->lk_length); | |
2693 | ||
1da177e4 LT |
2694 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
2695 | return nfserr_inval; | |
2696 | ||
ca364317 | 2697 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
8837abca | 2698 | S_IFREG, NFSD_MAY_LOCK))) { |
a6f6ef2f AA |
2699 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
2700 | return status; | |
2701 | } | |
2702 | ||
1da177e4 LT |
2703 | nfs4_lock_state(); |
2704 | ||
2705 | if (lock->lk_is_new) { | |
893f8770 N |
2706 | /* |
2707 | * Client indicates that this is a new lockowner. | |
2708 | * Use open owner and open stateid to create lock owner and | |
2709 | * lock stateid. | |
2710 | */ | |
1da177e4 LT |
2711 | struct nfs4_stateid *open_stp = NULL; |
2712 | struct nfs4_file *fp; | |
2713 | ||
2714 | status = nfserr_stale_clientid; | |
849823c5 | 2715 | if (STALE_CLIENTID(&lock->lk_new_clientid)) |
1da177e4 | 2716 | goto out; |
1da177e4 | 2717 | |
1da177e4 | 2718 | /* validate and update open stateid and open seqid */ |
ca364317 | 2719 | status = nfs4_preprocess_seqid_op(&cstate->current_fh, |
1da177e4 LT |
2720 | lock->lk_new_open_seqid, |
2721 | &lock->lk_new_open_stateid, | |
f3362737 | 2722 | OPEN_STATE, |
3a65588a | 2723 | &lock->lk_replay_owner, &open_stp, |
b59e3c0e | 2724 | lock); |
37515177 | 2725 | if (status) |
1da177e4 | 2726 | goto out; |
3a65588a | 2727 | open_sop = lock->lk_replay_owner; |
1da177e4 LT |
2728 | /* create lockowner and lock stateid */ |
2729 | fp = open_stp->st_file; | |
2730 | strhashval = lock_ownerstr_hashval(fp->fi_inode, | |
2731 | open_sop->so_client->cl_clientid.cl_id, | |
2732 | &lock->v.new.owner); | |
3e9e3dbe N |
2733 | /* XXX: Do we need to check for duplicate stateowners on |
2734 | * the same file, or should they just be allowed (and | |
2735 | * create new stateids)? */ | |
1da177e4 | 2736 | status = nfserr_resource; |
b59e3c0e NB |
2737 | lock_sop = alloc_init_lock_stateowner(strhashval, |
2738 | open_sop->so_client, open_stp, lock); | |
2739 | if (lock_sop == NULL) | |
1da177e4 | 2740 | goto out; |
b59e3c0e | 2741 | lock_stp = alloc_init_lock_stateid(lock_sop, fp, open_stp); |
8a280510 | 2742 | if (lock_stp == NULL) |
1da177e4 | 2743 | goto out; |
1da177e4 LT |
2744 | } else { |
2745 | /* lock (lock owner + lock stateid) already exists */ | |
ca364317 | 2746 | status = nfs4_preprocess_seqid_op(&cstate->current_fh, |
1da177e4 LT |
2747 | lock->lk_old_lock_seqid, |
2748 | &lock->lk_old_lock_stateid, | |
f3362737 | 2749 | LOCK_STATE, |
3a65588a | 2750 | &lock->lk_replay_owner, &lock_stp, lock); |
1da177e4 LT |
2751 | if (status) |
2752 | goto out; | |
3a65588a | 2753 | lock_sop = lock->lk_replay_owner; |
1da177e4 | 2754 | } |
3a65588a | 2755 | /* lock->lk_replay_owner and lock_stp have been created or found */ |
1da177e4 LT |
2756 | filp = lock_stp->st_vfs_file; |
2757 | ||
0dd395dc | 2758 | status = nfserr_grace; |
af558e33 | 2759 | if (locks_in_grace() && !lock->lk_reclaim) |
0dd395dc N |
2760 | goto out; |
2761 | status = nfserr_no_grace; | |
af558e33 | 2762 | if (!locks_in_grace() && lock->lk_reclaim) |
0dd395dc N |
2763 | goto out; |
2764 | ||
1da177e4 LT |
2765 | locks_init_lock(&file_lock); |
2766 | switch (lock->lk_type) { | |
2767 | case NFS4_READ_LT: | |
2768 | case NFS4_READW_LT: | |
2769 | file_lock.fl_type = F_RDLCK; | |
150b3934 | 2770 | cmd = F_SETLK; |
1da177e4 LT |
2771 | break; |
2772 | case NFS4_WRITE_LT: | |
2773 | case NFS4_WRITEW_LT: | |
2774 | file_lock.fl_type = F_WRLCK; | |
150b3934 | 2775 | cmd = F_SETLK; |
1da177e4 LT |
2776 | break; |
2777 | default: | |
2778 | status = nfserr_inval; | |
2779 | goto out; | |
2780 | } | |
b59e3c0e | 2781 | file_lock.fl_owner = (fl_owner_t)lock_sop; |
1da177e4 LT |
2782 | file_lock.fl_pid = current->tgid; |
2783 | file_lock.fl_file = filp; | |
2784 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 2785 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
2786 | |
2787 | file_lock.fl_start = lock->lk_offset; | |
87df4de8 | 2788 | file_lock.fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); |
1da177e4 LT |
2789 | nfs4_transform_lock_offset(&file_lock); |
2790 | ||
2791 | /* | |
2792 | * Try to lock the file in the VFS. | |
2793 | * Note: locks.c uses the BKL to protect the inode's lock list. | |
2794 | */ | |
2795 | ||
fd85b817 | 2796 | err = vfs_lock_file(filp, cmd, &file_lock, &conflock); |
b8dd7b9a | 2797 | switch (-err) { |
1da177e4 LT |
2798 | case 0: /* success! */ |
2799 | update_stateid(&lock_stp->st_stateid); | |
2800 | memcpy(&lock->lk_resp_stateid, &lock_stp->st_stateid, | |
2801 | sizeof(stateid_t)); | |
b8dd7b9a | 2802 | status = 0; |
eb76b3fd AA |
2803 | break; |
2804 | case (EAGAIN): /* conflock holds conflicting lock */ | |
2805 | status = nfserr_denied; | |
2806 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | |
2807 | nfs4_set_lock_denied(&conflock, &lock->lk_denied); | |
2808 | break; | |
1da177e4 LT |
2809 | case (EDEADLK): |
2810 | status = nfserr_deadlock; | |
eb76b3fd | 2811 | break; |
1da177e4 | 2812 | default: |
fd85b817 | 2813 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
eb76b3fd AA |
2814 | status = nfserr_resource; |
2815 | break; | |
1da177e4 | 2816 | } |
1da177e4 | 2817 | out: |
8a280510 | 2818 | if (status && lock->lk_is_new && lock_sop) |
f044ff83 | 2819 | release_lockowner(lock_sop); |
3a65588a BF |
2820 | if (lock->lk_replay_owner) { |
2821 | nfs4_get_stateowner(lock->lk_replay_owner); | |
a4f1706a | 2822 | cstate->replay_owner = lock->lk_replay_owner; |
f2327d9a | 2823 | } |
1da177e4 LT |
2824 | nfs4_unlock_state(); |
2825 | return status; | |
2826 | } | |
2827 | ||
55ef1274 BF |
2828 | /* |
2829 | * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, | |
2830 | * so we do a temporary open here just to get an open file to pass to | |
2831 | * vfs_test_lock. (Arguably perhaps test_lock should be done with an | |
2832 | * inode operation.) | |
2833 | */ | |
2834 | static int nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) | |
2835 | { | |
2836 | struct file *file; | |
2837 | int err; | |
2838 | ||
2839 | err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); | |
2840 | if (err) | |
2841 | return err; | |
2842 | err = vfs_test_lock(file, lock); | |
2843 | nfsd_close(file); | |
2844 | return err; | |
2845 | } | |
2846 | ||
1da177e4 LT |
2847 | /* |
2848 | * LOCKT operation | |
2849 | */ | |
b37ad28b | 2850 | __be32 |
ca364317 BF |
2851 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
2852 | struct nfsd4_lockt *lockt) | |
1da177e4 LT |
2853 | { |
2854 | struct inode *inode; | |
1da177e4 | 2855 | struct file_lock file_lock; |
fd85b817 | 2856 | int error; |
b37ad28b | 2857 | __be32 status; |
1da177e4 | 2858 | |
af558e33 | 2859 | if (locks_in_grace()) |
1da177e4 LT |
2860 | return nfserr_grace; |
2861 | ||
2862 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | |
2863 | return nfserr_inval; | |
2864 | ||
2865 | lockt->lt_stateowner = NULL; | |
2866 | nfs4_lock_state(); | |
2867 | ||
2868 | status = nfserr_stale_clientid; | |
849823c5 | 2869 | if (STALE_CLIENTID(&lockt->lt_clientid)) |
1da177e4 | 2870 | goto out; |
1da177e4 | 2871 | |
ca364317 | 2872 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) { |
849823c5 | 2873 | dprintk("NFSD: nfsd4_lockt: fh_verify() failed!\n"); |
1da177e4 LT |
2874 | if (status == nfserr_symlink) |
2875 | status = nfserr_inval; | |
2876 | goto out; | |
2877 | } | |
2878 | ||
ca364317 | 2879 | inode = cstate->current_fh.fh_dentry->d_inode; |
1da177e4 LT |
2880 | locks_init_lock(&file_lock); |
2881 | switch (lockt->lt_type) { | |
2882 | case NFS4_READ_LT: | |
2883 | case NFS4_READW_LT: | |
2884 | file_lock.fl_type = F_RDLCK; | |
2885 | break; | |
2886 | case NFS4_WRITE_LT: | |
2887 | case NFS4_WRITEW_LT: | |
2888 | file_lock.fl_type = F_WRLCK; | |
2889 | break; | |
2890 | default: | |
2fdada03 | 2891 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
1da177e4 LT |
2892 | status = nfserr_inval; |
2893 | goto out; | |
2894 | } | |
2895 | ||
2896 | lockt->lt_stateowner = find_lockstateowner_str(inode, | |
2897 | &lockt->lt_clientid, &lockt->lt_owner); | |
2898 | if (lockt->lt_stateowner) | |
2899 | file_lock.fl_owner = (fl_owner_t)lockt->lt_stateowner; | |
2900 | file_lock.fl_pid = current->tgid; | |
2901 | file_lock.fl_flags = FL_POSIX; | |
2902 | ||
2903 | file_lock.fl_start = lockt->lt_offset; | |
87df4de8 | 2904 | file_lock.fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); |
1da177e4 LT |
2905 | |
2906 | nfs4_transform_lock_offset(&file_lock); | |
2907 | ||
1da177e4 | 2908 | status = nfs_ok; |
55ef1274 | 2909 | error = nfsd_test_lock(rqstp, &cstate->current_fh, &file_lock); |
fd85b817 ME |
2910 | if (error) { |
2911 | status = nfserrno(error); | |
2912 | goto out; | |
2913 | } | |
9d6a8c5c | 2914 | if (file_lock.fl_type != F_UNLCK) { |
1da177e4 | 2915 | status = nfserr_denied; |
9d6a8c5c | 2916 | nfs4_set_lock_denied(&file_lock, &lockt->lt_denied); |
1da177e4 LT |
2917 | } |
2918 | out: | |
2919 | nfs4_unlock_state(); | |
2920 | return status; | |
2921 | } | |
2922 | ||
b37ad28b | 2923 | __be32 |
ca364317 | 2924 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 2925 | struct nfsd4_locku *locku) |
1da177e4 LT |
2926 | { |
2927 | struct nfs4_stateid *stp; | |
2928 | struct file *filp = NULL; | |
2929 | struct file_lock file_lock; | |
b37ad28b | 2930 | __be32 status; |
b8dd7b9a | 2931 | int err; |
1da177e4 LT |
2932 | |
2933 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", | |
2934 | (long long) locku->lu_offset, | |
2935 | (long long) locku->lu_length); | |
2936 | ||
2937 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | |
2938 | return nfserr_inval; | |
2939 | ||
2940 | nfs4_lock_state(); | |
2941 | ||
ca364317 | 2942 | if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh, |
1da177e4 LT |
2943 | locku->lu_seqid, |
2944 | &locku->lu_stateid, | |
f3362737 | 2945 | LOCK_STATE, |
1da177e4 LT |
2946 | &locku->lu_stateowner, &stp, NULL))) |
2947 | goto out; | |
2948 | ||
2949 | filp = stp->st_vfs_file; | |
2950 | BUG_ON(!filp); | |
2951 | locks_init_lock(&file_lock); | |
2952 | file_lock.fl_type = F_UNLCK; | |
2953 | file_lock.fl_owner = (fl_owner_t) locku->lu_stateowner; | |
2954 | file_lock.fl_pid = current->tgid; | |
2955 | file_lock.fl_file = filp; | |
2956 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 2957 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
2958 | file_lock.fl_start = locku->lu_offset; |
2959 | ||
87df4de8 | 2960 | file_lock.fl_end = last_byte_offset(locku->lu_offset, locku->lu_length); |
1da177e4 LT |
2961 | nfs4_transform_lock_offset(&file_lock); |
2962 | ||
2963 | /* | |
2964 | * Try to unlock the file in the VFS. | |
2965 | */ | |
fd85b817 | 2966 | err = vfs_lock_file(filp, F_SETLK, &file_lock, NULL); |
b8dd7b9a | 2967 | if (err) { |
fd85b817 | 2968 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
1da177e4 LT |
2969 | goto out_nfserr; |
2970 | } | |
2971 | /* | |
2972 | * OK, unlock succeeded; the only thing left to do is update the stateid. | |
2973 | */ | |
2974 | update_stateid(&stp->st_stateid); | |
2975 | memcpy(&locku->lu_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
2976 | ||
2977 | out: | |
f2327d9a | 2978 | if (locku->lu_stateowner) { |
1da177e4 | 2979 | nfs4_get_stateowner(locku->lu_stateowner); |
a4f1706a | 2980 | cstate->replay_owner = locku->lu_stateowner; |
f2327d9a | 2981 | } |
1da177e4 LT |
2982 | nfs4_unlock_state(); |
2983 | return status; | |
2984 | ||
2985 | out_nfserr: | |
b8dd7b9a | 2986 | status = nfserrno(err); |
1da177e4 LT |
2987 | goto out; |
2988 | } | |
2989 | ||
2990 | /* | |
2991 | * returns | |
2992 | * 1: locks held by lockowner | |
2993 | * 0: no locks held by lockowner | |
2994 | */ | |
2995 | static int | |
2996 | check_for_locks(struct file *filp, struct nfs4_stateowner *lowner) | |
2997 | { | |
2998 | struct file_lock **flpp; | |
7eaa36e2 | 2999 | struct inode *inode = filp->f_path.dentry->d_inode; |
1da177e4 LT |
3000 | int status = 0; |
3001 | ||
3002 | lock_kernel(); | |
3003 | for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { | |
796dadfd | 3004 | if ((*flpp)->fl_owner == (fl_owner_t)lowner) { |
1da177e4 LT |
3005 | status = 1; |
3006 | goto out; | |
796dadfd | 3007 | } |
1da177e4 LT |
3008 | } |
3009 | out: | |
3010 | unlock_kernel(); | |
3011 | return status; | |
3012 | } | |
3013 | ||
b37ad28b | 3014 | __be32 |
b591480b BF |
3015 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
3016 | struct nfsd4_compound_state *cstate, | |
3017 | struct nfsd4_release_lockowner *rlockowner) | |
1da177e4 LT |
3018 | { |
3019 | clientid_t *clid = &rlockowner->rl_clientid; | |
3e9e3dbe N |
3020 | struct nfs4_stateowner *sop; |
3021 | struct nfs4_stateid *stp; | |
1da177e4 | 3022 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
3e9e3dbe N |
3023 | struct list_head matches; |
3024 | int i; | |
b37ad28b | 3025 | __be32 status; |
1da177e4 LT |
3026 | |
3027 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | |
3028 | clid->cl_boot, clid->cl_id); | |
3029 | ||
3030 | /* XXX check for lease expiration */ | |
3031 | ||
3032 | status = nfserr_stale_clientid; | |
849823c5 | 3033 | if (STALE_CLIENTID(clid)) |
1da177e4 | 3034 | return status; |
1da177e4 LT |
3035 | |
3036 | nfs4_lock_state(); | |
3037 | ||
3e9e3dbe N |
3038 | status = nfserr_locks_held; |
3039 | /* XXX: we're doing a linear search through all the lockowners. | |
3040 | * Yipes! For now we'll just hope clients aren't really using | |
3041 | * release_lockowner much, but eventually we have to fix these | |
3042 | * data structures. */ | |
3043 | INIT_LIST_HEAD(&matches); | |
3044 | for (i = 0; i < LOCK_HASH_SIZE; i++) { | |
3045 | list_for_each_entry(sop, &lock_ownerid_hashtbl[i], so_idhash) { | |
599e0a22 | 3046 | if (!same_owner_str(sop, owner, clid)) |
3e9e3dbe N |
3047 | continue; |
3048 | list_for_each_entry(stp, &sop->so_stateids, | |
3049 | st_perstateowner) { | |
3050 | if (check_for_locks(stp->st_vfs_file, sop)) | |
3051 | goto out; | |
3052 | /* Note: so_perclient unused for lockowners, | |
3053 | * so it's OK to fool with here. */ | |
3054 | list_add(&sop->so_perclient, &matches); | |
3055 | } | |
1da177e4 | 3056 | } |
3e9e3dbe N |
3057 | } |
3058 | /* Clients probably won't expect us to return with some (but not all) | |
3059 | * of the lockowner state released; so don't release any until all | |
3060 | * have been checked. */ | |
3061 | status = nfs_ok; | |
0fa822e4 N |
3062 | while (!list_empty(&matches)) { |
3063 | sop = list_entry(matches.next, struct nfs4_stateowner, | |
3064 | so_perclient); | |
3065 | /* unhash_stateowner deletes so_perclient only | |
3066 | * for openowners. */ | |
3067 | list_del(&sop->so_perclient); | |
f044ff83 | 3068 | release_lockowner(sop); |
1da177e4 LT |
3069 | } |
3070 | out: | |
3071 | nfs4_unlock_state(); | |
3072 | return status; | |
3073 | } | |
3074 | ||
3075 | static inline struct nfs4_client_reclaim * | |
a55370a3 | 3076 | alloc_reclaim(void) |
1da177e4 | 3077 | { |
a55370a3 | 3078 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
1da177e4 LT |
3079 | } |
3080 | ||
c7b9a459 N |
3081 | int |
3082 | nfs4_has_reclaimed_state(const char *name) | |
3083 | { | |
3084 | unsigned int strhashval = clientstr_hashval(name); | |
3085 | struct nfs4_client *clp; | |
3086 | ||
3087 | clp = find_confirmed_client_by_str(name, strhashval); | |
3088 | return clp ? 1 : 0; | |
3089 | } | |
3090 | ||
1da177e4 LT |
3091 | /* |
3092 | * failure => all reset bets are off, nfserr_no_grace... | |
3093 | */ | |
190e4fbf N |
3094 | int |
3095 | nfs4_client_to_reclaim(const char *name) | |
1da177e4 LT |
3096 | { |
3097 | unsigned int strhashval; | |
3098 | struct nfs4_client_reclaim *crp = NULL; | |
3099 | ||
a55370a3 N |
3100 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
3101 | crp = alloc_reclaim(); | |
1da177e4 LT |
3102 | if (!crp) |
3103 | return 0; | |
a55370a3 | 3104 | strhashval = clientstr_hashval(name); |
1da177e4 LT |
3105 | INIT_LIST_HEAD(&crp->cr_strhash); |
3106 | list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); | |
a55370a3 | 3107 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
1da177e4 LT |
3108 | reclaim_str_hashtbl_size++; |
3109 | return 1; | |
3110 | } | |
3111 | ||
3112 | static void | |
3113 | nfs4_release_reclaim(void) | |
3114 | { | |
3115 | struct nfs4_client_reclaim *crp = NULL; | |
3116 | int i; | |
3117 | ||
1da177e4 LT |
3118 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
3119 | while (!list_empty(&reclaim_str_hashtbl[i])) { | |
3120 | crp = list_entry(reclaim_str_hashtbl[i].next, | |
3121 | struct nfs4_client_reclaim, cr_strhash); | |
3122 | list_del(&crp->cr_strhash); | |
1da177e4 LT |
3123 | kfree(crp); |
3124 | reclaim_str_hashtbl_size--; | |
3125 | } | |
3126 | } | |
3127 | BUG_ON(reclaim_str_hashtbl_size); | |
3128 | } | |
3129 | ||
3130 | /* | |
3131 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | |
fd39ca9a | 3132 | static struct nfs4_client_reclaim * |
1da177e4 LT |
3133 | nfs4_find_reclaim_client(clientid_t *clid) |
3134 | { | |
3135 | unsigned int strhashval; | |
3136 | struct nfs4_client *clp; | |
3137 | struct nfs4_client_reclaim *crp = NULL; | |
3138 | ||
3139 | ||
3140 | /* find clientid in conf_id_hashtbl */ | |
3141 | clp = find_confirmed_client(clid); | |
3142 | if (clp == NULL) | |
3143 | return NULL; | |
3144 | ||
a55370a3 N |
3145 | dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", |
3146 | clp->cl_name.len, clp->cl_name.data, | |
3147 | clp->cl_recdir); | |
1da177e4 LT |
3148 | |
3149 | /* find clp->cl_name in reclaim_str_hashtbl */ | |
a55370a3 | 3150 | strhashval = clientstr_hashval(clp->cl_recdir); |
1da177e4 | 3151 | list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { |
a55370a3 | 3152 | if (same_name(crp->cr_recdir, clp->cl_recdir)) { |
1da177e4 LT |
3153 | return crp; |
3154 | } | |
3155 | } | |
3156 | return NULL; | |
3157 | } | |
3158 | ||
3159 | /* | |
3160 | * Called from OPEN. Look for clientid in reclaim list. | |
3161 | */ | |
b37ad28b | 3162 | __be32 |
1da177e4 LT |
3163 | nfs4_check_open_reclaim(clientid_t *clid) |
3164 | { | |
dfc83565 | 3165 | return nfs4_find_reclaim_client(clid) ? nfs_ok : nfserr_reclaim_bad; |
1da177e4 LT |
3166 | } |
3167 | ||
ac4d8ff2 | 3168 | /* initialization to perform at module load time: */ |
1da177e4 | 3169 | |
e8ff2a84 | 3170 | int |
ac4d8ff2 | 3171 | nfs4_state_init(void) |
1da177e4 | 3172 | { |
e8ff2a84 | 3173 | int i, status; |
1da177e4 | 3174 | |
e8ff2a84 BF |
3175 | status = nfsd4_init_slabs(); |
3176 | if (status) | |
3177 | return status; | |
1da177e4 LT |
3178 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
3179 | INIT_LIST_HEAD(&conf_id_hashtbl[i]); | |
3180 | INIT_LIST_HEAD(&conf_str_hashtbl[i]); | |
3181 | INIT_LIST_HEAD(&unconf_str_hashtbl[i]); | |
3182 | INIT_LIST_HEAD(&unconf_id_hashtbl[i]); | |
3183 | } | |
3184 | for (i = 0; i < FILE_HASH_SIZE; i++) { | |
3185 | INIT_LIST_HEAD(&file_hashtbl[i]); | |
3186 | } | |
3187 | for (i = 0; i < OWNER_HASH_SIZE; i++) { | |
3188 | INIT_LIST_HEAD(&ownerstr_hashtbl[i]); | |
3189 | INIT_LIST_HEAD(&ownerid_hashtbl[i]); | |
3190 | } | |
3191 | for (i = 0; i < STATEID_HASH_SIZE; i++) { | |
3192 | INIT_LIST_HEAD(&stateid_hashtbl[i]); | |
3193 | INIT_LIST_HEAD(&lockstateid_hashtbl[i]); | |
3194 | } | |
3195 | for (i = 0; i < LOCK_HASH_SIZE; i++) { | |
3196 | INIT_LIST_HEAD(&lock_ownerid_hashtbl[i]); | |
3197 | INIT_LIST_HEAD(&lock_ownerstr_hashtbl[i]); | |
3198 | } | |
1da177e4 | 3199 | memset(&onestateid, ~0, sizeof(stateid_t)); |
1da177e4 LT |
3200 | INIT_LIST_HEAD(&close_lru); |
3201 | INIT_LIST_HEAD(&client_lru); | |
3202 | INIT_LIST_HEAD(&del_recall_lru); | |
ac4d8ff2 N |
3203 | for (i = 0; i < CLIENT_HASH_SIZE; i++) |
3204 | INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); | |
3205 | reclaim_str_hashtbl_size = 0; | |
e8ff2a84 | 3206 | return 0; |
ac4d8ff2 N |
3207 | } |
3208 | ||
190e4fbf N |
3209 | static void |
3210 | nfsd4_load_reboot_recovery_data(void) | |
3211 | { | |
3212 | int status; | |
3213 | ||
0964a3d3 N |
3214 | nfs4_lock_state(); |
3215 | nfsd4_init_recdir(user_recovery_dirname); | |
190e4fbf | 3216 | status = nfsd4_recdir_load(); |
0964a3d3 | 3217 | nfs4_unlock_state(); |
190e4fbf N |
3218 | if (status) |
3219 | printk("NFSD: Failure reading reboot recovery data\n"); | |
3220 | } | |
3221 | ||
9a8db97e ME |
3222 | unsigned long |
3223 | get_nfs4_grace_period(void) | |
3224 | { | |
3225 | return max(user_lease_time, lease_time) * HZ; | |
3226 | } | |
3227 | ||
c2f1a551 MS |
3228 | /* |
3229 | * Since the lifetime of a delegation isn't limited to that of an open, a | |
3230 | * client may quite reasonably hang on to a delegation as long as it has | |
3231 | * the inode cached. This becomes an obvious problem the first time a | |
3232 | * client's inode cache approaches the size of the server's total memory. | |
3233 | * | |
3234 | * For now we avoid this problem by imposing a hard limit on the number | |
3235 | * of delegations, which varies according to the server's memory size. | |
3236 | */ | |
3237 | static void | |
3238 | set_max_delegations(void) | |
3239 | { | |
3240 | /* | |
3241 | * Allow at most 4 delegations per megabyte of RAM. Quick | |
3242 | * estimates suggest that in the worst case (where every delegation | |
3243 | * is for a different inode), a delegation could take about 1.5K, | |
3244 | * giving a worst case usage of about 6% of memory. | |
3245 | */ | |
3246 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); | |
3247 | } | |
3248 | ||
ac4d8ff2 N |
3249 | /* initialization to perform when the nfsd service is started: */ |
3250 | ||
3251 | static void | |
3252 | __nfs4_state_start(void) | |
3253 | { | |
9a8db97e | 3254 | unsigned long grace_time; |
ac4d8ff2 | 3255 | |
1da177e4 | 3256 | boot_time = get_seconds(); |
af558e33 | 3257 | grace_time = get_nfs4_grace_period(); |
d99a05ad | 3258 | lease_time = user_lease_time; |
af558e33 | 3259 | locks_start_grace(&nfsd4_manager); |
9a8db97e ME |
3260 | printk(KERN_INFO "NFSD: starting %ld-second grace period\n", |
3261 | grace_time/HZ); | |
58da282b | 3262 | laundry_wq = create_singlethread_workqueue("nfsd4"); |
9a8db97e | 3263 | queue_delayed_work(laundry_wq, &laundromat_work, grace_time); |
c2f1a551 | 3264 | set_max_delegations(); |
1da177e4 LT |
3265 | } |
3266 | ||
e8ff2a84 | 3267 | void |
76a3550e | 3268 | nfs4_state_start(void) |
1da177e4 | 3269 | { |
1da177e4 | 3270 | if (nfs4_init) |
e8ff2a84 | 3271 | return; |
190e4fbf | 3272 | nfsd4_load_reboot_recovery_data(); |
76a3550e | 3273 | __nfs4_state_start(); |
1da177e4 | 3274 | nfs4_init = 1; |
e8ff2a84 | 3275 | return; |
1da177e4 LT |
3276 | } |
3277 | ||
1da177e4 LT |
3278 | time_t |
3279 | nfs4_lease_time(void) | |
3280 | { | |
3281 | return lease_time; | |
3282 | } | |
3283 | ||
3284 | static void | |
3285 | __nfs4_state_shutdown(void) | |
3286 | { | |
3287 | int i; | |
3288 | struct nfs4_client *clp = NULL; | |
3289 | struct nfs4_delegation *dp = NULL; | |
1da177e4 LT |
3290 | struct list_head *pos, *next, reaplist; |
3291 | ||
1da177e4 LT |
3292 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
3293 | while (!list_empty(&conf_id_hashtbl[i])) { | |
3294 | clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
3295 | expire_client(clp); | |
3296 | } | |
3297 | while (!list_empty(&unconf_str_hashtbl[i])) { | |
3298 | clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); | |
3299 | expire_client(clp); | |
3300 | } | |
3301 | } | |
3302 | INIT_LIST_HEAD(&reaplist); | |
3303 | spin_lock(&recall_lock); | |
3304 | list_for_each_safe(pos, next, &del_recall_lru) { | |
3305 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
3306 | list_move(&dp->dl_recall_lru, &reaplist); | |
3307 | } | |
3308 | spin_unlock(&recall_lock); | |
3309 | list_for_each_safe(pos, next, &reaplist) { | |
3310 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
3311 | list_del_init(&dp->dl_recall_lru); | |
3312 | unhash_delegation(dp); | |
3313 | } | |
3314 | ||
190e4fbf | 3315 | nfsd4_shutdown_recdir(); |
1da177e4 | 3316 | nfs4_init = 0; |
1da177e4 LT |
3317 | } |
3318 | ||
3319 | void | |
3320 | nfs4_state_shutdown(void) | |
3321 | { | |
5e8d5c29 N |
3322 | cancel_rearming_delayed_workqueue(laundry_wq, &laundromat_work); |
3323 | destroy_workqueue(laundry_wq); | |
2c5e7615 | 3324 | locks_end_grace(&nfsd4_manager); |
1da177e4 LT |
3325 | nfs4_lock_state(); |
3326 | nfs4_release_reclaim(); | |
3327 | __nfs4_state_shutdown(); | |
1da177e4 LT |
3328 | nfs4_unlock_state(); |
3329 | } | |
3330 | ||
3dd98a3b JL |
3331 | /* |
3332 | * user_recovery_dirname is protected by the nfsd_mutex since it's only | |
3333 | * accessed when nfsd is starting. | |
3334 | */ | |
0964a3d3 N |
3335 | static void |
3336 | nfs4_set_recdir(char *recdir) | |
3337 | { | |
0964a3d3 | 3338 | strcpy(user_recovery_dirname, recdir); |
0964a3d3 N |
3339 | } |
3340 | ||
3341 | /* | |
3342 | * Change the NFSv4 recovery directory to recdir. | |
3343 | */ | |
3344 | int | |
3345 | nfs4_reset_recoverydir(char *recdir) | |
3346 | { | |
3347 | int status; | |
a63bb996 | 3348 | struct path path; |
0964a3d3 | 3349 | |
a63bb996 | 3350 | status = kern_path(recdir, LOOKUP_FOLLOW, &path); |
0964a3d3 N |
3351 | if (status) |
3352 | return status; | |
3353 | status = -ENOTDIR; | |
a63bb996 | 3354 | if (S_ISDIR(path.dentry->d_inode->i_mode)) { |
0964a3d3 N |
3355 | nfs4_set_recdir(recdir); |
3356 | status = 0; | |
3357 | } | |
a63bb996 | 3358 | path_put(&path); |
0964a3d3 N |
3359 | return status; |
3360 | } | |
3361 | ||
3dd98a3b JL |
3362 | char * |
3363 | nfs4_recoverydir(void) | |
3364 | { | |
3365 | return user_recovery_dirname; | |
3366 | } | |
3367 | ||
1da177e4 LT |
3368 | /* |
3369 | * Called when leasetime is changed. | |
3370 | * | |
d99a05ad N |
3371 | * The only way the protocol gives us to handle on-the-fly lease changes is to |
3372 | * simulate a reboot. Instead of doing that, we just wait till the next time | |
3373 | * we start to register any changes in lease time. If the administrator | |
3374 | * really wants to change the lease time *now*, they can go ahead and bring | |
3375 | * nfsd down and then back up again after changing the lease time. | |
3dd98a3b JL |
3376 | * |
3377 | * user_lease_time is protected by nfsd_mutex since it's only really accessed | |
3378 | * when nfsd is starting | |
1da177e4 LT |
3379 | */ |
3380 | void | |
3381 | nfs4_reset_lease(time_t leasetime) | |
3382 | { | |
d99a05ad | 3383 | user_lease_time = leasetime; |
1da177e4 | 3384 | } |