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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 | ||
7116ed6b AA |
385 | static void |
386 | release_session(struct nfsd4_session *ses) | |
387 | { | |
388 | list_del(&ses->se_hash); | |
389 | list_del(&ses->se_perclnt); | |
390 | nfsd4_put_session(ses); | |
391 | } | |
392 | ||
393 | void | |
394 | free_session(struct kref *kref) | |
395 | { | |
396 | struct nfsd4_session *ses; | |
397 | ||
398 | ses = container_of(kref, struct nfsd4_session, se_ref); | |
399 | kfree(ses->se_slots); | |
400 | kfree(ses); | |
401 | } | |
402 | ||
1da177e4 LT |
403 | static inline void |
404 | renew_client(struct nfs4_client *clp) | |
405 | { | |
406 | /* | |
407 | * Move client to the end to the LRU list. | |
408 | */ | |
409 | dprintk("renewing client (clientid %08x/%08x)\n", | |
410 | clp->cl_clientid.cl_boot, | |
411 | clp->cl_clientid.cl_id); | |
412 | list_move_tail(&clp->cl_lru, &client_lru); | |
413 | clp->cl_time = get_seconds(); | |
414 | } | |
415 | ||
416 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ | |
417 | static int | |
418 | STALE_CLIENTID(clientid_t *clid) | |
419 | { | |
420 | if (clid->cl_boot == boot_time) | |
421 | return 0; | |
422 | dprintk("NFSD stale clientid (%08x/%08x)\n", | |
423 | clid->cl_boot, clid->cl_id); | |
424 | return 1; | |
425 | } | |
426 | ||
427 | /* | |
428 | * XXX Should we use a slab cache ? | |
429 | * This type of memory management is somewhat inefficient, but we use it | |
430 | * anyway since SETCLIENTID is not a common operation. | |
431 | */ | |
35bba9a3 | 432 | static struct nfs4_client *alloc_client(struct xdr_netobj name) |
1da177e4 LT |
433 | { |
434 | struct nfs4_client *clp; | |
435 | ||
35bba9a3 BF |
436 | clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); |
437 | if (clp == NULL) | |
438 | return NULL; | |
439 | clp->cl_name.data = kmalloc(name.len, GFP_KERNEL); | |
440 | if (clp->cl_name.data == NULL) { | |
441 | kfree(clp); | |
442 | return NULL; | |
1da177e4 | 443 | } |
35bba9a3 BF |
444 | memcpy(clp->cl_name.data, name.data, name.len); |
445 | clp->cl_name.len = name.len; | |
1da177e4 LT |
446 | return clp; |
447 | } | |
448 | ||
1b1a9b31 BF |
449 | static void |
450 | shutdown_callback_client(struct nfs4_client *clp) | |
451 | { | |
452 | struct rpc_clnt *clnt = clp->cl_callback.cb_client; | |
453 | ||
1b1a9b31 | 454 | if (clnt) { |
404ec117 BF |
455 | /* |
456 | * Callback threads take a reference on the client, so there | |
457 | * should be no outstanding callbacks at this point. | |
458 | */ | |
1b1a9b31 BF |
459 | clp->cl_callback.cb_client = NULL; |
460 | rpc_shutdown_client(clnt); | |
461 | } | |
462 | } | |
463 | ||
1da177e4 LT |
464 | static inline void |
465 | free_client(struct nfs4_client *clp) | |
466 | { | |
1b1a9b31 | 467 | shutdown_callback_client(clp); |
1da177e4 LT |
468 | if (clp->cl_cred.cr_group_info) |
469 | put_group_info(clp->cl_cred.cr_group_info); | |
68e76ad0 | 470 | kfree(clp->cl_principal); |
1da177e4 LT |
471 | kfree(clp->cl_name.data); |
472 | kfree(clp); | |
473 | } | |
474 | ||
475 | void | |
476 | put_nfs4_client(struct nfs4_client *clp) | |
477 | { | |
478 | if (atomic_dec_and_test(&clp->cl_count)) | |
479 | free_client(clp); | |
480 | } | |
481 | ||
482 | static void | |
483 | expire_client(struct nfs4_client *clp) | |
484 | { | |
485 | struct nfs4_stateowner *sop; | |
486 | struct nfs4_delegation *dp; | |
1da177e4 LT |
487 | struct list_head reaplist; |
488 | ||
489 | dprintk("NFSD: expire_client cl_count %d\n", | |
490 | atomic_read(&clp->cl_count)); | |
491 | ||
1da177e4 LT |
492 | INIT_LIST_HEAD(&reaplist); |
493 | spin_lock(&recall_lock); | |
ea1da636 N |
494 | while (!list_empty(&clp->cl_delegations)) { |
495 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); | |
1da177e4 LT |
496 | dprintk("NFSD: expire client. dp %p, fp %p\n", dp, |
497 | dp->dl_flock); | |
ea1da636 | 498 | list_del_init(&dp->dl_perclnt); |
1da177e4 LT |
499 | list_move(&dp->dl_recall_lru, &reaplist); |
500 | } | |
501 | spin_unlock(&recall_lock); | |
502 | while (!list_empty(&reaplist)) { | |
503 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
504 | list_del_init(&dp->dl_recall_lru); | |
505 | unhash_delegation(dp); | |
506 | } | |
507 | list_del(&clp->cl_idhash); | |
508 | list_del(&clp->cl_strhash); | |
509 | list_del(&clp->cl_lru); | |
ea1da636 N |
510 | while (!list_empty(&clp->cl_openowners)) { |
511 | sop = list_entry(clp->cl_openowners.next, struct nfs4_stateowner, so_perclient); | |
f044ff83 | 512 | release_openowner(sop); |
1da177e4 | 513 | } |
c4bf7868 ME |
514 | while (!list_empty(&clp->cl_sessions)) { |
515 | struct nfsd4_session *ses; | |
516 | ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, | |
517 | se_perclnt); | |
518 | release_session(ses); | |
519 | } | |
1da177e4 LT |
520 | put_nfs4_client(clp); |
521 | } | |
522 | ||
35bba9a3 BF |
523 | static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir) |
524 | { | |
1da177e4 LT |
525 | struct nfs4_client *clp; |
526 | ||
35bba9a3 BF |
527 | clp = alloc_client(name); |
528 | if (clp == NULL) | |
529 | return NULL; | |
a55370a3 | 530 | memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); |
1da177e4 LT |
531 | atomic_set(&clp->cl_count, 1); |
532 | atomic_set(&clp->cl_callback.cb_set, 0); | |
1da177e4 LT |
533 | INIT_LIST_HEAD(&clp->cl_idhash); |
534 | INIT_LIST_HEAD(&clp->cl_strhash); | |
ea1da636 N |
535 | INIT_LIST_HEAD(&clp->cl_openowners); |
536 | INIT_LIST_HEAD(&clp->cl_delegations); | |
9fb87070 | 537 | INIT_LIST_HEAD(&clp->cl_sessions); |
1da177e4 | 538 | INIT_LIST_HEAD(&clp->cl_lru); |
1da177e4 LT |
539 | return clp; |
540 | } | |
541 | ||
35bba9a3 BF |
542 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
543 | { | |
544 | memcpy(target->cl_verifier.data, source->data, | |
545 | sizeof(target->cl_verifier.data)); | |
1da177e4 LT |
546 | } |
547 | ||
35bba9a3 BF |
548 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
549 | { | |
1da177e4 LT |
550 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
551 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; | |
552 | } | |
553 | ||
35bba9a3 BF |
554 | static void copy_cred(struct svc_cred *target, struct svc_cred *source) |
555 | { | |
1da177e4 LT |
556 | target->cr_uid = source->cr_uid; |
557 | target->cr_gid = source->cr_gid; | |
558 | target->cr_group_info = source->cr_group_info; | |
559 | get_group_info(target->cr_group_info); | |
560 | } | |
561 | ||
35bba9a3 | 562 | static int same_name(const char *n1, const char *n2) |
599e0a22 | 563 | { |
a55370a3 | 564 | return 0 == memcmp(n1, n2, HEXDIR_LEN); |
1da177e4 LT |
565 | } |
566 | ||
567 | static int | |
599e0a22 BF |
568 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
569 | { | |
570 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); | |
1da177e4 LT |
571 | } |
572 | ||
573 | static int | |
599e0a22 BF |
574 | same_clid(clientid_t *cl1, clientid_t *cl2) |
575 | { | |
576 | return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); | |
1da177e4 LT |
577 | } |
578 | ||
579 | /* XXX what about NGROUP */ | |
580 | static int | |
599e0a22 BF |
581 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
582 | { | |
583 | return cr1->cr_uid == cr2->cr_uid; | |
1da177e4 LT |
584 | } |
585 | ||
5ec7b46c BF |
586 | static void gen_clid(struct nfs4_client *clp) |
587 | { | |
588 | static u32 current_clientid = 1; | |
589 | ||
1da177e4 LT |
590 | clp->cl_clientid.cl_boot = boot_time; |
591 | clp->cl_clientid.cl_id = current_clientid++; | |
592 | } | |
593 | ||
deda2faa BF |
594 | static void gen_confirm(struct nfs4_client *clp) |
595 | { | |
596 | static u32 i; | |
597 | u32 *p; | |
1da177e4 | 598 | |
1da177e4 | 599 | p = (u32 *)clp->cl_confirm.data; |
deda2faa BF |
600 | *p++ = get_seconds(); |
601 | *p++ = i++; | |
1da177e4 LT |
602 | } |
603 | ||
35bba9a3 BF |
604 | static int check_name(struct xdr_netobj name) |
605 | { | |
1da177e4 LT |
606 | if (name.len == 0) |
607 | return 0; | |
608 | if (name.len > NFS4_OPAQUE_LIMIT) { | |
2fdada03 | 609 | dprintk("NFSD: check_name: name too long(%d)!\n", name.len); |
1da177e4 LT |
610 | return 0; |
611 | } | |
612 | return 1; | |
613 | } | |
614 | ||
fd39ca9a | 615 | static void |
1da177e4 LT |
616 | add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) |
617 | { | |
618 | unsigned int idhashval; | |
619 | ||
620 | list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); | |
621 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
622 | list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); | |
623 | list_add_tail(&clp->cl_lru, &client_lru); | |
624 | clp->cl_time = get_seconds(); | |
625 | } | |
626 | ||
fd39ca9a | 627 | static void |
1da177e4 LT |
628 | move_to_confirmed(struct nfs4_client *clp) |
629 | { | |
630 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
631 | unsigned int strhashval; | |
632 | ||
633 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); | |
634 | list_del_init(&clp->cl_strhash); | |
f116629d | 635 | list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); |
a55370a3 | 636 | strhashval = clientstr_hashval(clp->cl_recdir); |
1da177e4 LT |
637 | list_add(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); |
638 | renew_client(clp); | |
639 | } | |
640 | ||
641 | static struct nfs4_client * | |
642 | find_confirmed_client(clientid_t *clid) | |
643 | { | |
644 | struct nfs4_client *clp; | |
645 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
646 | ||
647 | list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { | |
599e0a22 | 648 | if (same_clid(&clp->cl_clientid, clid)) |
1da177e4 LT |
649 | return clp; |
650 | } | |
651 | return NULL; | |
652 | } | |
653 | ||
654 | static struct nfs4_client * | |
655 | find_unconfirmed_client(clientid_t *clid) | |
656 | { | |
657 | struct nfs4_client *clp; | |
658 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
659 | ||
660 | list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { | |
599e0a22 | 661 | if (same_clid(&clp->cl_clientid, clid)) |
1da177e4 LT |
662 | return clp; |
663 | } | |
664 | return NULL; | |
665 | } | |
666 | ||
28ce6054 N |
667 | static struct nfs4_client * |
668 | find_confirmed_client_by_str(const char *dname, unsigned int hashval) | |
669 | { | |
670 | struct nfs4_client *clp; | |
671 | ||
672 | list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) { | |
673 | if (same_name(clp->cl_recdir, dname)) | |
674 | return clp; | |
675 | } | |
676 | return NULL; | |
677 | } | |
678 | ||
679 | static struct nfs4_client * | |
680 | find_unconfirmed_client_by_str(const char *dname, unsigned int hashval) | |
681 | { | |
682 | struct nfs4_client *clp; | |
683 | ||
684 | list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) { | |
685 | if (same_name(clp->cl_recdir, dname)) | |
686 | return clp; | |
687 | } | |
688 | return NULL; | |
689 | } | |
690 | ||
1da177e4 LT |
691 | /* a helper function for parse_callback */ |
692 | static int | |
693 | parse_octet(unsigned int *lenp, char **addrp) | |
694 | { | |
695 | unsigned int len = *lenp; | |
696 | char *p = *addrp; | |
697 | int n = -1; | |
698 | char c; | |
699 | ||
700 | for (;;) { | |
701 | if (!len) | |
702 | break; | |
703 | len--; | |
704 | c = *p++; | |
705 | if (c == '.') | |
706 | break; | |
707 | if ((c < '0') || (c > '9')) { | |
708 | n = -1; | |
709 | break; | |
710 | } | |
711 | if (n < 0) | |
712 | n = 0; | |
713 | n = (n * 10) + (c - '0'); | |
714 | if (n > 255) { | |
715 | n = -1; | |
716 | break; | |
717 | } | |
718 | } | |
719 | *lenp = len; | |
720 | *addrp = p; | |
721 | return n; | |
722 | } | |
723 | ||
724 | /* parse and set the setclientid ipv4 callback address */ | |
fd39ca9a | 725 | static int |
1da177e4 LT |
726 | parse_ipv4(unsigned int addr_len, char *addr_val, unsigned int *cbaddrp, unsigned short *cbportp) |
727 | { | |
728 | int temp = 0; | |
729 | u32 cbaddr = 0; | |
730 | u16 cbport = 0; | |
731 | u32 addrlen = addr_len; | |
732 | char *addr = addr_val; | |
733 | int i, shift; | |
734 | ||
735 | /* ipaddress */ | |
736 | shift = 24; | |
737 | for(i = 4; i > 0 ; i--) { | |
738 | if ((temp = parse_octet(&addrlen, &addr)) < 0) { | |
739 | return 0; | |
740 | } | |
741 | cbaddr |= (temp << shift); | |
742 | if (shift > 0) | |
743 | shift -= 8; | |
744 | } | |
745 | *cbaddrp = cbaddr; | |
746 | ||
747 | /* port */ | |
748 | shift = 8; | |
749 | for(i = 2; i > 0 ; i--) { | |
750 | if ((temp = parse_octet(&addrlen, &addr)) < 0) { | |
751 | return 0; | |
752 | } | |
753 | cbport |= (temp << shift); | |
754 | if (shift > 0) | |
755 | shift -= 8; | |
756 | } | |
757 | *cbportp = cbport; | |
758 | return 1; | |
759 | } | |
760 | ||
fd39ca9a | 761 | static void |
1da177e4 LT |
762 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se) |
763 | { | |
764 | struct nfs4_callback *cb = &clp->cl_callback; | |
765 | ||
766 | /* Currently, we only support tcp for the callback channel */ | |
767 | if ((se->se_callback_netid_len != 3) || memcmp((char *)se->se_callback_netid_val, "tcp", 3)) | |
768 | goto out_err; | |
769 | ||
770 | if ( !(parse_ipv4(se->se_callback_addr_len, se->se_callback_addr_val, | |
771 | &cb->cb_addr, &cb->cb_port))) | |
772 | goto out_err; | |
773 | cb->cb_prog = se->se_callback_prog; | |
774 | cb->cb_ident = se->se_callback_ident; | |
1da177e4 LT |
775 | return; |
776 | out_err: | |
849823c5 | 777 | dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " |
1da177e4 LT |
778 | "will not receive delegations\n", |
779 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
780 | ||
1da177e4 LT |
781 | return; |
782 | } | |
783 | ||
b37ad28b | 784 | __be32 |
b591480b BF |
785 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
786 | struct nfsd4_setclientid *setclid) | |
1da177e4 | 787 | { |
27459f09 | 788 | struct sockaddr_in *sin = svc_addr_in(rqstp); |
1da177e4 LT |
789 | struct xdr_netobj clname = { |
790 | .len = setclid->se_namelen, | |
791 | .data = setclid->se_name, | |
792 | }; | |
793 | nfs4_verifier clverifier = setclid->se_verf; | |
794 | unsigned int strhashval; | |
28ce6054 | 795 | struct nfs4_client *conf, *unconf, *new; |
b37ad28b | 796 | __be32 status; |
68e76ad0 | 797 | char *princ; |
a55370a3 | 798 | char dname[HEXDIR_LEN]; |
1da177e4 | 799 | |
1da177e4 | 800 | if (!check_name(clname)) |
73aea4ec | 801 | return nfserr_inval; |
1da177e4 | 802 | |
a55370a3 N |
803 | status = nfs4_make_rec_clidname(dname, &clname); |
804 | if (status) | |
73aea4ec | 805 | return status; |
a55370a3 | 806 | |
1da177e4 LT |
807 | /* |
808 | * XXX The Duplicate Request Cache (DRC) has been checked (??) | |
809 | * We get here on a DRC miss. | |
810 | */ | |
811 | ||
a55370a3 | 812 | strhashval = clientstr_hashval(dname); |
1da177e4 | 813 | |
1da177e4 | 814 | nfs4_lock_state(); |
28ce6054 N |
815 | conf = find_confirmed_client_by_str(dname, strhashval); |
816 | if (conf) { | |
a186e767 | 817 | /* RFC 3530 14.2.33 CASE 0: */ |
1da177e4 | 818 | status = nfserr_clid_inuse; |
026722c2 BF |
819 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { |
820 | dprintk("NFSD: setclientid: string in use by client" | |
821 | " at %pI4\n", &conf->cl_addr); | |
1da177e4 LT |
822 | goto out; |
823 | } | |
1da177e4 | 824 | } |
a186e767 BF |
825 | /* |
826 | * section 14.2.33 of RFC 3530 (under the heading "IMPLEMENTATION") | |
827 | * has a description of SETCLIENTID request processing consisting | |
828 | * of 5 bullet points, labeled as CASE0 - CASE4 below. | |
829 | */ | |
28ce6054 | 830 | unconf = find_unconfirmed_client_by_str(dname, strhashval); |
1da177e4 LT |
831 | status = nfserr_resource; |
832 | if (!conf) { | |
a186e767 BF |
833 | /* |
834 | * RFC 3530 14.2.33 CASE 4: | |
835 | * placed first, because it is the normal case | |
1da177e4 LT |
836 | */ |
837 | if (unconf) | |
838 | expire_client(unconf); | |
a55370a3 N |
839 | new = create_client(clname, dname); |
840 | if (new == NULL) | |
1da177e4 | 841 | goto out; |
1da177e4 | 842 | gen_clid(new); |
599e0a22 | 843 | } else if (same_verf(&conf->cl_verifier, &clverifier)) { |
1da177e4 | 844 | /* |
a186e767 BF |
845 | * RFC 3530 14.2.33 CASE 1: |
846 | * probable callback update | |
1da177e4 | 847 | */ |
31f4a6c1 N |
848 | if (unconf) { |
849 | /* Note this is removing unconfirmed {*x***}, | |
850 | * which is stronger than RFC recommended {vxc**}. | |
851 | * This has the advantage that there is at most | |
852 | * one {*x***} in either list at any time. | |
853 | */ | |
854 | expire_client(unconf); | |
1da177e4 | 855 | } |
a55370a3 N |
856 | new = create_client(clname, dname); |
857 | if (new == NULL) | |
1da177e4 | 858 | goto out; |
1da177e4 | 859 | copy_clid(new, conf); |
1da177e4 LT |
860 | } else if (!unconf) { |
861 | /* | |
a186e767 BF |
862 | * RFC 3530 14.2.33 CASE 2: |
863 | * probable client reboot; state will be removed if | |
864 | * confirmed. | |
1da177e4 | 865 | */ |
a55370a3 N |
866 | new = create_client(clname, dname); |
867 | if (new == NULL) | |
1da177e4 | 868 | goto out; |
1da177e4 | 869 | gen_clid(new); |
49ba8781 | 870 | } else { |
a186e767 BF |
871 | /* |
872 | * RFC 3530 14.2.33 CASE 3: | |
873 | * probable client reboot; state will be removed if | |
874 | * confirmed. | |
1da177e4 LT |
875 | */ |
876 | expire_client(unconf); | |
a55370a3 N |
877 | new = create_client(clname, dname); |
878 | if (new == NULL) | |
1da177e4 | 879 | goto out; |
1da177e4 | 880 | gen_clid(new); |
1da177e4 | 881 | } |
c175b83c BF |
882 | copy_verf(new, &clverifier); |
883 | new->cl_addr = sin->sin_addr.s_addr; | |
61054b14 | 884 | new->cl_flavor = rqstp->rq_flavor; |
68e76ad0 OK |
885 | princ = svc_gss_principal(rqstp); |
886 | if (princ) { | |
887 | new->cl_principal = kstrdup(princ, GFP_KERNEL); | |
888 | if (new->cl_principal == NULL) { | |
889 | free_client(new); | |
890 | goto out; | |
891 | } | |
892 | } | |
c175b83c BF |
893 | copy_cred(&new->cl_cred, &rqstp->rq_cred); |
894 | gen_confirm(new); | |
895 | gen_callback(new, setclid); | |
896 | add_to_unconfirmed(new, strhashval); | |
1da177e4 LT |
897 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
898 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; | |
899 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); | |
900 | status = nfs_ok; | |
901 | out: | |
902 | nfs4_unlock_state(); | |
903 | return status; | |
904 | } | |
905 | ||
906 | ||
907 | /* | |
a186e767 BF |
908 | * Section 14.2.34 of RFC 3530 (under the heading "IMPLEMENTATION") has |
909 | * a description of SETCLIENTID_CONFIRM request processing consisting of 4 | |
910 | * bullets, labeled as CASE1 - CASE4 below. | |
1da177e4 | 911 | */ |
b37ad28b | 912 | __be32 |
b591480b BF |
913 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
914 | struct nfsd4_compound_state *cstate, | |
915 | struct nfsd4_setclientid_confirm *setclientid_confirm) | |
1da177e4 | 916 | { |
27459f09 | 917 | struct sockaddr_in *sin = svc_addr_in(rqstp); |
21ab45a4 | 918 | struct nfs4_client *conf, *unconf; |
1da177e4 LT |
919 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
920 | clientid_t * clid = &setclientid_confirm->sc_clientid; | |
b37ad28b | 921 | __be32 status; |
1da177e4 LT |
922 | |
923 | if (STALE_CLIENTID(clid)) | |
924 | return nfserr_stale_clientid; | |
925 | /* | |
926 | * XXX The Duplicate Request Cache (DRC) has been checked (??) | |
927 | * We get here on a DRC miss. | |
928 | */ | |
929 | ||
930 | nfs4_lock_state(); | |
21ab45a4 N |
931 | |
932 | conf = find_confirmed_client(clid); | |
933 | unconf = find_unconfirmed_client(clid); | |
934 | ||
935 | status = nfserr_clid_inuse; | |
27459f09 | 936 | if (conf && conf->cl_addr != sin->sin_addr.s_addr) |
21ab45a4 | 937 | goto out; |
27459f09 | 938 | if (unconf && unconf->cl_addr != sin->sin_addr.s_addr) |
21ab45a4 N |
939 | goto out; |
940 | ||
a186e767 BF |
941 | /* |
942 | * section 14.2.34 of RFC 3530 has a description of | |
943 | * SETCLIENTID_CONFIRM request processing consisting | |
944 | * of 4 bullet points, labeled as CASE1 - CASE4 below. | |
945 | */ | |
366e0c1d | 946 | if (conf && unconf && same_verf(&confirm, &unconf->cl_confirm)) { |
a186e767 BF |
947 | /* |
948 | * RFC 3530 14.2.34 CASE 1: | |
949 | * callback update | |
950 | */ | |
599e0a22 | 951 | if (!same_creds(&conf->cl_cred, &unconf->cl_cred)) |
1da177e4 LT |
952 | status = nfserr_clid_inuse; |
953 | else { | |
1a69c179 N |
954 | /* XXX: We just turn off callbacks until we can handle |
955 | * change request correctly. */ | |
cb36d634 | 956 | atomic_set(&conf->cl_callback.cb_set, 0); |
21ab45a4 | 957 | gen_confirm(conf); |
46309029 | 958 | nfsd4_remove_clid_dir(unconf); |
1a69c179 | 959 | expire_client(unconf); |
1da177e4 | 960 | status = nfs_ok; |
1a69c179 | 961 | |
1da177e4 | 962 | } |
f3aba4e5 | 963 | } else if (conf && !unconf) { |
a186e767 BF |
964 | /* |
965 | * RFC 3530 14.2.34 CASE 2: | |
966 | * probable retransmitted request; play it safe and | |
967 | * do nothing. | |
7c79f737 | 968 | */ |
599e0a22 | 969 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) |
1da177e4 | 970 | status = nfserr_clid_inuse; |
21ab45a4 | 971 | else |
1da177e4 | 972 | status = nfs_ok; |
7c79f737 | 973 | } else if (!conf && unconf |
599e0a22 | 974 | && same_verf(&unconf->cl_confirm, &confirm)) { |
a186e767 BF |
975 | /* |
976 | * RFC 3530 14.2.34 CASE 3: | |
977 | * Normal case; new or rebooted client: | |
7c79f737 | 978 | */ |
599e0a22 | 979 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred)) { |
1da177e4 LT |
980 | status = nfserr_clid_inuse; |
981 | } else { | |
1a69c179 N |
982 | unsigned int hash = |
983 | clientstr_hashval(unconf->cl_recdir); | |
984 | conf = find_confirmed_client_by_str(unconf->cl_recdir, | |
985 | hash); | |
986 | if (conf) { | |
c7b9a459 | 987 | nfsd4_remove_clid_dir(conf); |
1a69c179 N |
988 | expire_client(conf); |
989 | } | |
1da177e4 | 990 | move_to_confirmed(unconf); |
21ab45a4 | 991 | conf = unconf; |
46f8a64b | 992 | nfsd4_probe_callback(conf); |
1a69c179 | 993 | status = nfs_ok; |
1da177e4 | 994 | } |
599e0a22 BF |
995 | } else if ((!conf || (conf && !same_verf(&conf->cl_confirm, &confirm))) |
996 | && (!unconf || (unconf && !same_verf(&unconf->cl_confirm, | |
7c79f737 | 997 | &confirm)))) { |
a186e767 BF |
998 | /* |
999 | * RFC 3530 14.2.34 CASE 4: | |
1000 | * Client probably hasn't noticed that we rebooted yet. | |
7c79f737 | 1001 | */ |
1da177e4 | 1002 | status = nfserr_stale_clientid; |
7c79f737 | 1003 | } else { |
08e8987c N |
1004 | /* check that we have hit one of the cases...*/ |
1005 | status = nfserr_clid_inuse; | |
1006 | } | |
1da177e4 | 1007 | out: |
1da177e4 LT |
1008 | nfs4_unlock_state(); |
1009 | return status; | |
1010 | } | |
1011 | ||
1da177e4 LT |
1012 | /* OPEN Share state helper functions */ |
1013 | static inline struct nfs4_file * | |
1014 | alloc_init_file(struct inode *ino) | |
1015 | { | |
1016 | struct nfs4_file *fp; | |
1017 | unsigned int hashval = file_hashval(ino); | |
1018 | ||
e60d4398 N |
1019 | fp = kmem_cache_alloc(file_slab, GFP_KERNEL); |
1020 | if (fp) { | |
8b671b80 | 1021 | atomic_set(&fp->fi_ref, 1); |
1da177e4 | 1022 | INIT_LIST_HEAD(&fp->fi_hash); |
8beefa24 N |
1023 | INIT_LIST_HEAD(&fp->fi_stateids); |
1024 | INIT_LIST_HEAD(&fp->fi_delegations); | |
8b671b80 | 1025 | spin_lock(&recall_lock); |
1da177e4 | 1026 | list_add(&fp->fi_hash, &file_hashtbl[hashval]); |
8b671b80 | 1027 | spin_unlock(&recall_lock); |
1da177e4 LT |
1028 | fp->fi_inode = igrab(ino); |
1029 | fp->fi_id = current_fileid++; | |
47f9940c | 1030 | fp->fi_had_conflict = false; |
1da177e4 LT |
1031 | return fp; |
1032 | } | |
1033 | return NULL; | |
1034 | } | |
1035 | ||
e60d4398 | 1036 | static void |
e18b890b | 1037 | nfsd4_free_slab(struct kmem_cache **slab) |
1da177e4 | 1038 | { |
e60d4398 N |
1039 | if (*slab == NULL) |
1040 | return; | |
1a1d92c1 | 1041 | kmem_cache_destroy(*slab); |
e60d4398 | 1042 | *slab = NULL; |
1da177e4 LT |
1043 | } |
1044 | ||
e8ff2a84 | 1045 | void |
1da177e4 LT |
1046 | nfsd4_free_slabs(void) |
1047 | { | |
e60d4398 N |
1048 | nfsd4_free_slab(&stateowner_slab); |
1049 | nfsd4_free_slab(&file_slab); | |
5ac049ac | 1050 | nfsd4_free_slab(&stateid_slab); |
5b2d21c1 | 1051 | nfsd4_free_slab(&deleg_slab); |
e60d4398 | 1052 | } |
1da177e4 | 1053 | |
e60d4398 N |
1054 | static int |
1055 | nfsd4_init_slabs(void) | |
1056 | { | |
1057 | stateowner_slab = kmem_cache_create("nfsd4_stateowners", | |
20c2df83 | 1058 | sizeof(struct nfs4_stateowner), 0, 0, NULL); |
e60d4398 N |
1059 | if (stateowner_slab == NULL) |
1060 | goto out_nomem; | |
1061 | file_slab = kmem_cache_create("nfsd4_files", | |
20c2df83 | 1062 | sizeof(struct nfs4_file), 0, 0, NULL); |
e60d4398 N |
1063 | if (file_slab == NULL) |
1064 | goto out_nomem; | |
5ac049ac | 1065 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
20c2df83 | 1066 | sizeof(struct nfs4_stateid), 0, 0, NULL); |
5ac049ac N |
1067 | if (stateid_slab == NULL) |
1068 | goto out_nomem; | |
5b2d21c1 | 1069 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
20c2df83 | 1070 | sizeof(struct nfs4_delegation), 0, 0, NULL); |
5b2d21c1 N |
1071 | if (deleg_slab == NULL) |
1072 | goto out_nomem; | |
e60d4398 N |
1073 | return 0; |
1074 | out_nomem: | |
1075 | nfsd4_free_slabs(); | |
1076 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); | |
1077 | return -ENOMEM; | |
1da177e4 LT |
1078 | } |
1079 | ||
1080 | void | |
1081 | nfs4_free_stateowner(struct kref *kref) | |
1082 | { | |
1083 | struct nfs4_stateowner *sop = | |
1084 | container_of(kref, struct nfs4_stateowner, so_ref); | |
1085 | kfree(sop->so_owner.data); | |
1086 | kmem_cache_free(stateowner_slab, sop); | |
1087 | } | |
1088 | ||
1089 | static inline struct nfs4_stateowner * | |
1090 | alloc_stateowner(struct xdr_netobj *owner) | |
1091 | { | |
1092 | struct nfs4_stateowner *sop; | |
1093 | ||
1094 | if ((sop = kmem_cache_alloc(stateowner_slab, GFP_KERNEL))) { | |
1095 | if ((sop->so_owner.data = kmalloc(owner->len, GFP_KERNEL))) { | |
1096 | memcpy(sop->so_owner.data, owner->data, owner->len); | |
1097 | sop->so_owner.len = owner->len; | |
1098 | kref_init(&sop->so_ref); | |
1099 | return sop; | |
1100 | } | |
1101 | kmem_cache_free(stateowner_slab, sop); | |
1102 | } | |
1103 | return NULL; | |
1104 | } | |
1105 | ||
1106 | static struct nfs4_stateowner * | |
1107 | alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { | |
1108 | struct nfs4_stateowner *sop; | |
1109 | struct nfs4_replay *rp; | |
1110 | unsigned int idhashval; | |
1111 | ||
1112 | if (!(sop = alloc_stateowner(&open->op_owner))) | |
1113 | return NULL; | |
1114 | idhashval = ownerid_hashval(current_ownerid); | |
1115 | INIT_LIST_HEAD(&sop->so_idhash); | |
1116 | INIT_LIST_HEAD(&sop->so_strhash); | |
1117 | INIT_LIST_HEAD(&sop->so_perclient); | |
ea1da636 N |
1118 | INIT_LIST_HEAD(&sop->so_stateids); |
1119 | INIT_LIST_HEAD(&sop->so_perstateid); /* not used */ | |
1da177e4 LT |
1120 | INIT_LIST_HEAD(&sop->so_close_lru); |
1121 | sop->so_time = 0; | |
1122 | list_add(&sop->so_idhash, &ownerid_hashtbl[idhashval]); | |
1123 | list_add(&sop->so_strhash, &ownerstr_hashtbl[strhashval]); | |
ea1da636 | 1124 | list_add(&sop->so_perclient, &clp->cl_openowners); |
1da177e4 LT |
1125 | sop->so_is_open_owner = 1; |
1126 | sop->so_id = current_ownerid++; | |
1127 | sop->so_client = clp; | |
1128 | sop->so_seqid = open->op_seqid; | |
1129 | sop->so_confirmed = 0; | |
1130 | rp = &sop->so_replay; | |
de1ae286 | 1131 | rp->rp_status = nfserr_serverfault; |
1da177e4 LT |
1132 | rp->rp_buflen = 0; |
1133 | rp->rp_buf = rp->rp_ibuf; | |
1134 | return sop; | |
1135 | } | |
1136 | ||
1da177e4 LT |
1137 | static inline void |
1138 | init_stateid(struct nfs4_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { | |
1139 | struct nfs4_stateowner *sop = open->op_stateowner; | |
1140 | unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); | |
1141 | ||
1142 | INIT_LIST_HEAD(&stp->st_hash); | |
ea1da636 N |
1143 | INIT_LIST_HEAD(&stp->st_perstateowner); |
1144 | INIT_LIST_HEAD(&stp->st_lockowners); | |
1da177e4 LT |
1145 | INIT_LIST_HEAD(&stp->st_perfile); |
1146 | list_add(&stp->st_hash, &stateid_hashtbl[hashval]); | |
ea1da636 | 1147 | list_add(&stp->st_perstateowner, &sop->so_stateids); |
8beefa24 | 1148 | list_add(&stp->st_perfile, &fp->fi_stateids); |
1da177e4 | 1149 | stp->st_stateowner = sop; |
13cd2184 | 1150 | get_nfs4_file(fp); |
1da177e4 LT |
1151 | stp->st_file = fp; |
1152 | stp->st_stateid.si_boot = boot_time; | |
1153 | stp->st_stateid.si_stateownerid = sop->so_id; | |
1154 | stp->st_stateid.si_fileid = fp->fi_id; | |
1155 | stp->st_stateid.si_generation = 0; | |
1156 | stp->st_access_bmap = 0; | |
1157 | stp->st_deny_bmap = 0; | |
1158 | __set_bit(open->op_share_access, &stp->st_access_bmap); | |
1159 | __set_bit(open->op_share_deny, &stp->st_deny_bmap); | |
4c4cd222 | 1160 | stp->st_openstp = NULL; |
1da177e4 LT |
1161 | } |
1162 | ||
fd39ca9a | 1163 | static void |
1da177e4 LT |
1164 | move_to_close_lru(struct nfs4_stateowner *sop) |
1165 | { | |
1166 | dprintk("NFSD: move_to_close_lru nfs4_stateowner %p\n", sop); | |
1167 | ||
358dd55a | 1168 | list_move_tail(&sop->so_close_lru, &close_lru); |
1da177e4 LT |
1169 | sop->so_time = get_seconds(); |
1170 | } | |
1171 | ||
1da177e4 | 1172 | static int |
599e0a22 BF |
1173 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, |
1174 | clientid_t *clid) | |
1175 | { | |
1176 | return (sop->so_owner.len == owner->len) && | |
1177 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && | |
1178 | (sop->so_client->cl_clientid.cl_id == clid->cl_id); | |
1da177e4 LT |
1179 | } |
1180 | ||
1181 | static struct nfs4_stateowner * | |
1182 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open) | |
1183 | { | |
1184 | struct nfs4_stateowner *so = NULL; | |
1185 | ||
1186 | list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) { | |
599e0a22 | 1187 | if (same_owner_str(so, &open->op_owner, &open->op_clientid)) |
1da177e4 LT |
1188 | return so; |
1189 | } | |
1190 | return NULL; | |
1191 | } | |
1192 | ||
1193 | /* search file_hashtbl[] for file */ | |
1194 | static struct nfs4_file * | |
1195 | find_file(struct inode *ino) | |
1196 | { | |
1197 | unsigned int hashval = file_hashval(ino); | |
1198 | struct nfs4_file *fp; | |
1199 | ||
8b671b80 | 1200 | spin_lock(&recall_lock); |
1da177e4 | 1201 | list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { |
13cd2184 N |
1202 | if (fp->fi_inode == ino) { |
1203 | get_nfs4_file(fp); | |
8b671b80 | 1204 | spin_unlock(&recall_lock); |
1da177e4 | 1205 | return fp; |
13cd2184 | 1206 | } |
1da177e4 | 1207 | } |
8b671b80 | 1208 | spin_unlock(&recall_lock); |
1da177e4 LT |
1209 | return NULL; |
1210 | } | |
1211 | ||
8838dc43 | 1212 | static inline int access_valid(u32 x) |
ba5a6a19 | 1213 | { |
8838dc43 BF |
1214 | if (x < NFS4_SHARE_ACCESS_READ) |
1215 | return 0; | |
1216 | if (x > NFS4_SHARE_ACCESS_BOTH) | |
1217 | return 0; | |
1218 | return 1; | |
ba5a6a19 BF |
1219 | } |
1220 | ||
8838dc43 | 1221 | static inline int deny_valid(u32 x) |
ba5a6a19 | 1222 | { |
8838dc43 BF |
1223 | /* Note: unlike access bits, deny bits may be zero. */ |
1224 | return x <= NFS4_SHARE_DENY_BOTH; | |
ba5a6a19 | 1225 | } |
1da177e4 | 1226 | |
4f83aa30 BF |
1227 | /* |
1228 | * We store the NONE, READ, WRITE, and BOTH bits separately in the | |
1229 | * st_{access,deny}_bmap field of the stateid, in order to track not | |
1230 | * only what share bits are currently in force, but also what | |
1231 | * combinations of share bits previous opens have used. This allows us | |
1232 | * to enforce the recommendation of rfc 3530 14.2.19 that the server | |
1233 | * return an error if the client attempt to downgrade to a combination | |
1234 | * of share bits not explicable by closing some of its previous opens. | |
1235 | * | |
1236 | * XXX: This enforcement is actually incomplete, since we don't keep | |
1237 | * track of access/deny bit combinations; so, e.g., we allow: | |
1238 | * | |
1239 | * OPEN allow read, deny write | |
1240 | * OPEN allow both, deny none | |
1241 | * DOWNGRADE allow read, deny none | |
1242 | * | |
1243 | * which we should reject. | |
1244 | */ | |
fd39ca9a | 1245 | static void |
1da177e4 LT |
1246 | set_access(unsigned int *access, unsigned long bmap) { |
1247 | int i; | |
1248 | ||
1249 | *access = 0; | |
1250 | for (i = 1; i < 4; i++) { | |
1251 | if (test_bit(i, &bmap)) | |
1252 | *access |= i; | |
1253 | } | |
1254 | } | |
1255 | ||
fd39ca9a | 1256 | static void |
1da177e4 LT |
1257 | set_deny(unsigned int *deny, unsigned long bmap) { |
1258 | int i; | |
1259 | ||
1260 | *deny = 0; | |
1261 | for (i = 0; i < 4; i++) { | |
1262 | if (test_bit(i, &bmap)) | |
1263 | *deny |= i ; | |
1264 | } | |
1265 | } | |
1266 | ||
1267 | static int | |
1268 | test_share(struct nfs4_stateid *stp, struct nfsd4_open *open) { | |
1269 | unsigned int access, deny; | |
1270 | ||
1271 | set_access(&access, stp->st_access_bmap); | |
1272 | set_deny(&deny, stp->st_deny_bmap); | |
1273 | if ((access & open->op_share_deny) || (deny & open->op_share_access)) | |
1274 | return 0; | |
1275 | return 1; | |
1276 | } | |
1277 | ||
1278 | /* | |
1279 | * Called to check deny when READ with all zero stateid or | |
1280 | * WRITE with all zero or all one stateid | |
1281 | */ | |
b37ad28b | 1282 | static __be32 |
1da177e4 LT |
1283 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
1284 | { | |
1285 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
1286 | struct nfs4_file *fp; | |
1287 | struct nfs4_stateid *stp; | |
b37ad28b | 1288 | __be32 ret; |
1da177e4 LT |
1289 | |
1290 | dprintk("NFSD: nfs4_share_conflict\n"); | |
1291 | ||
1292 | fp = find_file(ino); | |
13cd2184 N |
1293 | if (!fp) |
1294 | return nfs_ok; | |
b700949b | 1295 | ret = nfserr_locked; |
1da177e4 | 1296 | /* Search for conflicting share reservations */ |
13cd2184 N |
1297 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { |
1298 | if (test_bit(deny_type, &stp->st_deny_bmap) || | |
1299 | test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap)) | |
1300 | goto out; | |
1da177e4 | 1301 | } |
13cd2184 N |
1302 | ret = nfs_ok; |
1303 | out: | |
1304 | put_nfs4_file(fp); | |
1305 | return ret; | |
1da177e4 LT |
1306 | } |
1307 | ||
1308 | static inline void | |
1309 | nfs4_file_downgrade(struct file *filp, unsigned int share_access) | |
1310 | { | |
1311 | if (share_access & NFS4_SHARE_ACCESS_WRITE) { | |
aceaf78d | 1312 | drop_file_write_access(filp); |
1da177e4 LT |
1313 | filp->f_mode = (filp->f_mode | FMODE_READ) & ~FMODE_WRITE; |
1314 | } | |
1315 | } | |
1316 | ||
1317 | /* | |
1318 | * Recall a delegation | |
1319 | */ | |
1320 | static int | |
1321 | do_recall(void *__dp) | |
1322 | { | |
1323 | struct nfs4_delegation *dp = __dp; | |
1324 | ||
47f9940c | 1325 | dp->dl_file->fi_had_conflict = true; |
1da177e4 LT |
1326 | nfsd4_cb_recall(dp); |
1327 | return 0; | |
1328 | } | |
1329 | ||
1330 | /* | |
1331 | * Spawn a thread to perform a recall on the delegation represented | |
1332 | * by the lease (file_lock) | |
1333 | * | |
1334 | * Called from break_lease() with lock_kernel() held. | |
1335 | * Note: we assume break_lease will only call this *once* for any given | |
1336 | * lease. | |
1337 | */ | |
1338 | static | |
1339 | void nfsd_break_deleg_cb(struct file_lock *fl) | |
1340 | { | |
1341 | struct nfs4_delegation *dp= (struct nfs4_delegation *)fl->fl_owner; | |
1342 | struct task_struct *t; | |
1343 | ||
1344 | dprintk("NFSD nfsd_break_deleg_cb: dp %p fl %p\n",dp,fl); | |
1345 | if (!dp) | |
1346 | return; | |
1347 | ||
1348 | /* We're assuming the state code never drops its reference | |
1349 | * without first removing the lease. Since we're in this lease | |
1350 | * callback (and since the lease code is serialized by the kernel | |
1351 | * lock) we know the server hasn't removed the lease yet, we know | |
1352 | * it's safe to take a reference: */ | |
1353 | atomic_inc(&dp->dl_count); | |
cfdcad4d | 1354 | atomic_inc(&dp->dl_client->cl_count); |
1da177e4 LT |
1355 | |
1356 | spin_lock(&recall_lock); | |
1357 | list_add_tail(&dp->dl_recall_lru, &del_recall_lru); | |
1358 | spin_unlock(&recall_lock); | |
1359 | ||
1360 | /* only place dl_time is set. protected by lock_kernel*/ | |
1361 | dp->dl_time = get_seconds(); | |
1362 | ||
0272e1fd BF |
1363 | /* |
1364 | * We don't want the locks code to timeout the lease for us; | |
1365 | * we'll remove it ourself if the delegation isn't returned | |
1366 | * in time. | |
1367 | */ | |
1368 | fl->fl_break_time = 0; | |
1da177e4 LT |
1369 | |
1370 | t = kthread_run(do_recall, dp, "%s", "nfs4_cb_recall"); | |
1371 | if (IS_ERR(t)) { | |
1372 | struct nfs4_client *clp = dp->dl_client; | |
1373 | ||
1374 | printk(KERN_INFO "NFSD: Callback thread failed for " | |
1375 | "for client (clientid %08x/%08x)\n", | |
1376 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
cfdcad4d | 1377 | put_nfs4_client(dp->dl_client); |
1da177e4 LT |
1378 | nfs4_put_delegation(dp); |
1379 | } | |
1380 | } | |
1381 | ||
1382 | /* | |
1383 | * The file_lock is being reapd. | |
1384 | * | |
1385 | * Called by locks_free_lock() with lock_kernel() held. | |
1386 | */ | |
1387 | static | |
1388 | void nfsd_release_deleg_cb(struct file_lock *fl) | |
1389 | { | |
1390 | struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner; | |
1391 | ||
1392 | dprintk("NFSD nfsd_release_deleg_cb: fl %p dp %p dl_count %d\n", fl,dp, atomic_read(&dp->dl_count)); | |
1393 | ||
1394 | if (!(fl->fl_flags & FL_LEASE) || !dp) | |
1395 | return; | |
1396 | dp->dl_flock = NULL; | |
1397 | } | |
1398 | ||
1399 | /* | |
1400 | * Set the delegation file_lock back pointer. | |
1401 | * | |
a9933cea | 1402 | * Called from setlease() with lock_kernel() held. |
1da177e4 LT |
1403 | */ |
1404 | static | |
1405 | void nfsd_copy_lock_deleg_cb(struct file_lock *new, struct file_lock *fl) | |
1406 | { | |
1407 | struct nfs4_delegation *dp = (struct nfs4_delegation *)new->fl_owner; | |
1408 | ||
1409 | dprintk("NFSD: nfsd_copy_lock_deleg_cb: new fl %p dp %p\n", new, dp); | |
1410 | if (!dp) | |
1411 | return; | |
1412 | dp->dl_flock = new; | |
1413 | } | |
1414 | ||
1415 | /* | |
a9933cea | 1416 | * Called from setlease() with lock_kernel() held |
1da177e4 LT |
1417 | */ |
1418 | static | |
1419 | int nfsd_same_client_deleg_cb(struct file_lock *onlist, struct file_lock *try) | |
1420 | { | |
1421 | struct nfs4_delegation *onlistd = | |
1422 | (struct nfs4_delegation *)onlist->fl_owner; | |
1423 | struct nfs4_delegation *tryd = | |
1424 | (struct nfs4_delegation *)try->fl_owner; | |
1425 | ||
1426 | if (onlist->fl_lmops != try->fl_lmops) | |
1427 | return 0; | |
1428 | ||
1429 | return onlistd->dl_client == tryd->dl_client; | |
1430 | } | |
1431 | ||
1432 | ||
1433 | static | |
1434 | int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) | |
1435 | { | |
1436 | if (arg & F_UNLCK) | |
1437 | return lease_modify(onlist, arg); | |
1438 | else | |
1439 | return -EAGAIN; | |
1440 | } | |
1441 | ||
fd39ca9a | 1442 | static struct lock_manager_operations nfsd_lease_mng_ops = { |
1da177e4 LT |
1443 | .fl_break = nfsd_break_deleg_cb, |
1444 | .fl_release_private = nfsd_release_deleg_cb, | |
1445 | .fl_copy_lock = nfsd_copy_lock_deleg_cb, | |
1446 | .fl_mylease = nfsd_same_client_deleg_cb, | |
1447 | .fl_change = nfsd_change_deleg_cb, | |
1448 | }; | |
1449 | ||
1450 | ||
b37ad28b | 1451 | __be32 |
1da177e4 LT |
1452 | nfsd4_process_open1(struct nfsd4_open *open) |
1453 | { | |
1da177e4 LT |
1454 | clientid_t *clientid = &open->op_clientid; |
1455 | struct nfs4_client *clp = NULL; | |
1456 | unsigned int strhashval; | |
1457 | struct nfs4_stateowner *sop = NULL; | |
1458 | ||
1da177e4 | 1459 | if (!check_name(open->op_owner)) |
0f442aa2 | 1460 | return nfserr_inval; |
1da177e4 LT |
1461 | |
1462 | if (STALE_CLIENTID(&open->op_clientid)) | |
1463 | return nfserr_stale_clientid; | |
1464 | ||
1465 | strhashval = ownerstr_hashval(clientid->cl_id, open->op_owner); | |
1466 | sop = find_openstateowner_str(strhashval, open); | |
0f442aa2 BF |
1467 | open->op_stateowner = sop; |
1468 | if (!sop) { | |
1469 | /* Make sure the client's lease hasn't expired. */ | |
1da177e4 LT |
1470 | clp = find_confirmed_client(clientid); |
1471 | if (clp == NULL) | |
0f442aa2 BF |
1472 | return nfserr_expired; |
1473 | goto renew; | |
1da177e4 | 1474 | } |
0f442aa2 BF |
1475 | if (!sop->so_confirmed) { |
1476 | /* Replace unconfirmed owners without checking for replay. */ | |
1477 | clp = sop->so_client; | |
f044ff83 | 1478 | release_openowner(sop); |
0f442aa2 BF |
1479 | open->op_stateowner = NULL; |
1480 | goto renew; | |
1481 | } | |
1482 | if (open->op_seqid == sop->so_seqid - 1) { | |
1483 | if (sop->so_replay.rp_buflen) | |
a90b061c | 1484 | return nfserr_replay_me; |
0f442aa2 BF |
1485 | /* The original OPEN failed so spectacularly |
1486 | * that we don't even have replay data saved! | |
1487 | * Therefore, we have no choice but to continue | |
1488 | * processing this OPEN; presumably, we'll | |
1489 | * fail again for the same reason. | |
1490 | */ | |
1491 | dprintk("nfsd4_process_open1: replay with no replay cache\n"); | |
1492 | goto renew; | |
1493 | } | |
1494 | if (open->op_seqid != sop->so_seqid) | |
1495 | return nfserr_bad_seqid; | |
1da177e4 | 1496 | renew: |
0f442aa2 BF |
1497 | if (open->op_stateowner == NULL) { |
1498 | sop = alloc_init_open_stateowner(strhashval, clp, open); | |
1499 | if (sop == NULL) | |
1500 | return nfserr_resource; | |
1501 | open->op_stateowner = sop; | |
1502 | } | |
1503 | list_del_init(&sop->so_close_lru); | |
1da177e4 | 1504 | renew_client(sop->so_client); |
0f442aa2 | 1505 | return nfs_ok; |
1da177e4 LT |
1506 | } |
1507 | ||
b37ad28b | 1508 | static inline __be32 |
4a6e43e6 N |
1509 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
1510 | { | |
1511 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | |
1512 | return nfserr_openmode; | |
1513 | else | |
1514 | return nfs_ok; | |
1515 | } | |
1516 | ||
52f4fb43 N |
1517 | static struct nfs4_delegation * |
1518 | find_delegation_file(struct nfs4_file *fp, stateid_t *stid) | |
1519 | { | |
1520 | struct nfs4_delegation *dp; | |
1521 | ||
ea1da636 | 1522 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) { |
52f4fb43 N |
1523 | if (dp->dl_stateid.si_stateownerid == stid->si_stateownerid) |
1524 | return dp; | |
1525 | } | |
1526 | return NULL; | |
1527 | } | |
1528 | ||
b37ad28b | 1529 | static __be32 |
567d9829 N |
1530 | nfs4_check_deleg(struct nfs4_file *fp, struct nfsd4_open *open, |
1531 | struct nfs4_delegation **dp) | |
1532 | { | |
1533 | int flags; | |
b37ad28b | 1534 | __be32 status = nfserr_bad_stateid; |
567d9829 N |
1535 | |
1536 | *dp = find_delegation_file(fp, &open->op_delegate_stateid); | |
1537 | if (*dp == NULL) | |
c44c5eeb | 1538 | goto out; |
567d9829 N |
1539 | flags = open->op_share_access == NFS4_SHARE_ACCESS_READ ? |
1540 | RD_STATE : WR_STATE; | |
1541 | status = nfs4_check_delegmode(*dp, flags); | |
1542 | if (status) | |
1543 | *dp = NULL; | |
c44c5eeb N |
1544 | out: |
1545 | if (open->op_claim_type != NFS4_OPEN_CLAIM_DELEGATE_CUR) | |
1546 | return nfs_ok; | |
1547 | if (status) | |
1548 | return status; | |
1549 | open->op_stateowner->so_confirmed = 1; | |
1550 | return nfs_ok; | |
567d9829 N |
1551 | } |
1552 | ||
b37ad28b | 1553 | static __be32 |
1da177e4 LT |
1554 | nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_stateid **stpp) |
1555 | { | |
1556 | struct nfs4_stateid *local; | |
b37ad28b | 1557 | __be32 status = nfserr_share_denied; |
1da177e4 LT |
1558 | struct nfs4_stateowner *sop = open->op_stateowner; |
1559 | ||
8beefa24 | 1560 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { |
1da177e4 LT |
1561 | /* ignore lock owners */ |
1562 | if (local->st_stateowner->so_is_open_owner == 0) | |
1563 | continue; | |
1564 | /* remember if we have seen this open owner */ | |
1565 | if (local->st_stateowner == sop) | |
1566 | *stpp = local; | |
1567 | /* check for conflicting share reservations */ | |
1568 | if (!test_share(local, open)) | |
1569 | goto out; | |
1570 | } | |
1571 | status = 0; | |
1572 | out: | |
1573 | return status; | |
1574 | } | |
1575 | ||
5ac049ac N |
1576 | static inline struct nfs4_stateid * |
1577 | nfs4_alloc_stateid(void) | |
1578 | { | |
1579 | return kmem_cache_alloc(stateid_slab, GFP_KERNEL); | |
1580 | } | |
1581 | ||
b37ad28b | 1582 | static __be32 |
1da177e4 | 1583 | nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_stateid **stpp, |
567d9829 | 1584 | struct nfs4_delegation *dp, |
1da177e4 LT |
1585 | struct svc_fh *cur_fh, int flags) |
1586 | { | |
1587 | struct nfs4_stateid *stp; | |
1da177e4 | 1588 | |
5ac049ac | 1589 | stp = nfs4_alloc_stateid(); |
1da177e4 LT |
1590 | if (stp == NULL) |
1591 | return nfserr_resource; | |
1592 | ||
567d9829 N |
1593 | if (dp) { |
1594 | get_file(dp->dl_vfs_file); | |
1595 | stp->st_vfs_file = dp->dl_vfs_file; | |
1596 | } else { | |
b37ad28b | 1597 | __be32 status; |
567d9829 N |
1598 | status = nfsd_open(rqstp, cur_fh, S_IFREG, flags, |
1599 | &stp->st_vfs_file); | |
1600 | if (status) { | |
1601 | if (status == nfserr_dropit) | |
1602 | status = nfserr_jukebox; | |
5ac049ac | 1603 | kmem_cache_free(stateid_slab, stp); |
567d9829 N |
1604 | return status; |
1605 | } | |
1da177e4 | 1606 | } |
1da177e4 LT |
1607 | *stpp = stp; |
1608 | return 0; | |
1609 | } | |
1610 | ||
b37ad28b | 1611 | static inline __be32 |
1da177e4 LT |
1612 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, |
1613 | struct nfsd4_open *open) | |
1614 | { | |
1615 | struct iattr iattr = { | |
1616 | .ia_valid = ATTR_SIZE, | |
1617 | .ia_size = 0, | |
1618 | }; | |
1619 | if (!open->op_truncate) | |
1620 | return 0; | |
1621 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
9246585a | 1622 | return nfserr_inval; |
1da177e4 LT |
1623 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); |
1624 | } | |
1625 | ||
b37ad28b | 1626 | static __be32 |
1da177e4 LT |
1627 | nfs4_upgrade_open(struct svc_rqst *rqstp, struct svc_fh *cur_fh, struct nfs4_stateid *stp, struct nfsd4_open *open) |
1628 | { | |
1629 | struct file *filp = stp->st_vfs_file; | |
7eaa36e2 | 1630 | struct inode *inode = filp->f_path.dentry->d_inode; |
6c26d08f | 1631 | unsigned int share_access, new_writer; |
b37ad28b | 1632 | __be32 status; |
1da177e4 LT |
1633 | |
1634 | set_access(&share_access, stp->st_access_bmap); | |
6c26d08f BF |
1635 | new_writer = (~share_access) & open->op_share_access |
1636 | & NFS4_SHARE_ACCESS_WRITE; | |
1da177e4 | 1637 | |
6c26d08f | 1638 | if (new_writer) { |
b37ad28b AV |
1639 | int err = get_write_access(inode); |
1640 | if (err) | |
1641 | return nfserrno(err); | |
e518f056 BH |
1642 | err = mnt_want_write(cur_fh->fh_export->ex_path.mnt); |
1643 | if (err) | |
1644 | return nfserrno(err); | |
1645 | file_take_write(filp); | |
6c26d08f | 1646 | } |
1da177e4 LT |
1647 | status = nfsd4_truncate(rqstp, cur_fh, open); |
1648 | if (status) { | |
6c26d08f BF |
1649 | if (new_writer) |
1650 | put_write_access(inode); | |
1da177e4 LT |
1651 | return status; |
1652 | } | |
1653 | /* remember the open */ | |
6c26d08f | 1654 | filp->f_mode |= open->op_share_access; |
b55e0ba1 BF |
1655 | __set_bit(open->op_share_access, &stp->st_access_bmap); |
1656 | __set_bit(open->op_share_deny, &stp->st_deny_bmap); | |
1da177e4 LT |
1657 | |
1658 | return nfs_ok; | |
1659 | } | |
1660 | ||
1661 | ||
1da177e4 | 1662 | static void |
37515177 | 1663 | nfs4_set_claim_prev(struct nfsd4_open *open) |
1da177e4 | 1664 | { |
37515177 N |
1665 | open->op_stateowner->so_confirmed = 1; |
1666 | open->op_stateowner->so_client->cl_firststate = 1; | |
1da177e4 LT |
1667 | } |
1668 | ||
1669 | /* | |
1670 | * Attempt to hand out a delegation. | |
1671 | */ | |
1672 | static void | |
1673 | nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_stateid *stp) | |
1674 | { | |
1675 | struct nfs4_delegation *dp; | |
1676 | struct nfs4_stateowner *sop = stp->st_stateowner; | |
1677 | struct nfs4_callback *cb = &sop->so_client->cl_callback; | |
1678 | struct file_lock fl, *flp = &fl; | |
1679 | int status, flag = 0; | |
1680 | ||
1681 | flag = NFS4_OPEN_DELEGATE_NONE; | |
7b190fec N |
1682 | open->op_recall = 0; |
1683 | switch (open->op_claim_type) { | |
1684 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
1685 | if (!atomic_read(&cb->cb_set)) | |
1686 | open->op_recall = 1; | |
1687 | flag = open->op_delegate_type; | |
1688 | if (flag == NFS4_OPEN_DELEGATE_NONE) | |
1689 | goto out; | |
1690 | break; | |
1691 | case NFS4_OPEN_CLAIM_NULL: | |
1692 | /* Let's not give out any delegations till everyone's | |
1693 | * had the chance to reclaim theirs.... */ | |
af558e33 | 1694 | if (locks_in_grace()) |
7b190fec N |
1695 | goto out; |
1696 | if (!atomic_read(&cb->cb_set) || !sop->so_confirmed) | |
1697 | goto out; | |
1698 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) | |
1699 | flag = NFS4_OPEN_DELEGATE_WRITE; | |
1700 | else | |
1701 | flag = NFS4_OPEN_DELEGATE_READ; | |
1702 | break; | |
1703 | default: | |
1704 | goto out; | |
1705 | } | |
1da177e4 LT |
1706 | |
1707 | dp = alloc_init_deleg(sop->so_client, stp, fh, flag); | |
1708 | if (dp == NULL) { | |
1709 | flag = NFS4_OPEN_DELEGATE_NONE; | |
1710 | goto out; | |
1711 | } | |
1712 | locks_init_lock(&fl); | |
1713 | fl.fl_lmops = &nfsd_lease_mng_ops; | |
1714 | fl.fl_flags = FL_LEASE; | |
9167f501 | 1715 | fl.fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; |
1da177e4 LT |
1716 | fl.fl_end = OFFSET_MAX; |
1717 | fl.fl_owner = (fl_owner_t)dp; | |
1718 | fl.fl_file = stp->st_vfs_file; | |
1719 | fl.fl_pid = current->tgid; | |
1720 | ||
a9933cea | 1721 | /* vfs_setlease checks to see if delegation should be handed out. |
1da177e4 LT |
1722 | * the lock_manager callbacks fl_mylease and fl_change are used |
1723 | */ | |
9167f501 | 1724 | if ((status = vfs_setlease(stp->st_vfs_file, fl.fl_type, &flp))) { |
1da177e4 | 1725 | dprintk("NFSD: setlease failed [%d], no delegation\n", status); |
c907132d | 1726 | unhash_delegation(dp); |
1da177e4 LT |
1727 | flag = NFS4_OPEN_DELEGATE_NONE; |
1728 | goto out; | |
1729 | } | |
1730 | ||
1731 | memcpy(&open->op_delegate_stateid, &dp->dl_stateid, sizeof(dp->dl_stateid)); | |
1732 | ||
1733 | dprintk("NFSD: delegation stateid=(%08x/%08x/%08x/%08x)\n\n", | |
1734 | dp->dl_stateid.si_boot, | |
1735 | dp->dl_stateid.si_stateownerid, | |
1736 | dp->dl_stateid.si_fileid, | |
1737 | dp->dl_stateid.si_generation); | |
1738 | out: | |
7b190fec N |
1739 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS |
1740 | && flag == NFS4_OPEN_DELEGATE_NONE | |
1741 | && open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) | |
2fdada03 | 1742 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); |
1da177e4 LT |
1743 | open->op_delegate_type = flag; |
1744 | } | |
1745 | ||
1746 | /* | |
1747 | * called with nfs4_lock_state() held. | |
1748 | */ | |
b37ad28b | 1749 | __be32 |
1da177e4 LT |
1750 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
1751 | { | |
1752 | struct nfs4_file *fp = NULL; | |
1753 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
1754 | struct nfs4_stateid *stp = NULL; | |
567d9829 | 1755 | struct nfs4_delegation *dp = NULL; |
b37ad28b | 1756 | __be32 status; |
1da177e4 LT |
1757 | |
1758 | status = nfserr_inval; | |
ba5a6a19 BF |
1759 | if (!access_valid(open->op_share_access) |
1760 | || !deny_valid(open->op_share_deny)) | |
1da177e4 LT |
1761 | goto out; |
1762 | /* | |
1763 | * Lookup file; if found, lookup stateid and check open request, | |
1764 | * and check for delegations in the process of being recalled. | |
1765 | * If not found, create the nfs4_file struct | |
1766 | */ | |
1767 | fp = find_file(ino); | |
1768 | if (fp) { | |
1769 | if ((status = nfs4_check_open(fp, open, &stp))) | |
1770 | goto out; | |
c44c5eeb N |
1771 | status = nfs4_check_deleg(fp, open, &dp); |
1772 | if (status) | |
1773 | goto out; | |
1da177e4 | 1774 | } else { |
c44c5eeb N |
1775 | status = nfserr_bad_stateid; |
1776 | if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) | |
1777 | goto out; | |
1da177e4 LT |
1778 | status = nfserr_resource; |
1779 | fp = alloc_init_file(ino); | |
1780 | if (fp == NULL) | |
1781 | goto out; | |
1782 | } | |
1783 | ||
1784 | /* | |
1785 | * OPEN the file, or upgrade an existing OPEN. | |
1786 | * If truncate fails, the OPEN fails. | |
1787 | */ | |
1788 | if (stp) { | |
1789 | /* Stateid was found, this is an OPEN upgrade */ | |
1790 | status = nfs4_upgrade_open(rqstp, current_fh, stp, open); | |
1791 | if (status) | |
1792 | goto out; | |
444c2c07 | 1793 | update_stateid(&stp->st_stateid); |
1da177e4 LT |
1794 | } else { |
1795 | /* Stateid was not found, this is a new OPEN */ | |
1796 | int flags = 0; | |
9ecb6a08 | 1797 | if (open->op_share_access & NFS4_SHARE_ACCESS_READ) |
8837abca | 1798 | flags |= NFSD_MAY_READ; |
1da177e4 | 1799 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) |
8837abca | 1800 | flags |= NFSD_MAY_WRITE; |
567d9829 N |
1801 | status = nfs4_new_open(rqstp, &stp, dp, current_fh, flags); |
1802 | if (status) | |
1da177e4 LT |
1803 | goto out; |
1804 | init_stateid(stp, fp, open); | |
1805 | status = nfsd4_truncate(rqstp, current_fh, open); | |
1806 | if (status) { | |
2283963f | 1807 | release_open_stateid(stp); |
1da177e4 LT |
1808 | goto out; |
1809 | } | |
1810 | } | |
1811 | memcpy(&open->op_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
1812 | ||
1813 | /* | |
1814 | * Attempt to hand out a delegation. No error return, because the | |
1815 | * OPEN succeeds even if we fail. | |
1816 | */ | |
1817 | nfs4_open_delegation(current_fh, open, stp); | |
1818 | ||
1819 | status = nfs_ok; | |
1820 | ||
1821 | dprintk("nfs4_process_open2: stateid=(%08x/%08x/%08x/%08x)\n", | |
1822 | stp->st_stateid.si_boot, stp->st_stateid.si_stateownerid, | |
1823 | stp->st_stateid.si_fileid, stp->st_stateid.si_generation); | |
1824 | out: | |
13cd2184 N |
1825 | if (fp) |
1826 | put_nfs4_file(fp); | |
37515177 N |
1827 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
1828 | nfs4_set_claim_prev(open); | |
1da177e4 LT |
1829 | /* |
1830 | * To finish the open response, we just need to set the rflags. | |
1831 | */ | |
1832 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | |
1833 | if (!open->op_stateowner->so_confirmed) | |
1834 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; | |
1835 | ||
1836 | return status; | |
1837 | } | |
1838 | ||
b37ad28b | 1839 | __be32 |
b591480b BF |
1840 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
1841 | clientid_t *clid) | |
1da177e4 LT |
1842 | { |
1843 | struct nfs4_client *clp; | |
b37ad28b | 1844 | __be32 status; |
1da177e4 LT |
1845 | |
1846 | nfs4_lock_state(); | |
1847 | dprintk("process_renew(%08x/%08x): starting\n", | |
1848 | clid->cl_boot, clid->cl_id); | |
1849 | status = nfserr_stale_clientid; | |
1850 | if (STALE_CLIENTID(clid)) | |
1851 | goto out; | |
1852 | clp = find_confirmed_client(clid); | |
1853 | status = nfserr_expired; | |
1854 | if (clp == NULL) { | |
1855 | /* We assume the client took too long to RENEW. */ | |
1856 | dprintk("nfsd4_renew: clientid not found!\n"); | |
1857 | goto out; | |
1858 | } | |
1859 | renew_client(clp); | |
1860 | status = nfserr_cb_path_down; | |
ea1da636 | 1861 | if (!list_empty(&clp->cl_delegations) |
1da177e4 LT |
1862 | && !atomic_read(&clp->cl_callback.cb_set)) |
1863 | goto out; | |
1864 | status = nfs_ok; | |
1865 | out: | |
1866 | nfs4_unlock_state(); | |
1867 | return status; | |
1868 | } | |
1869 | ||
af558e33 BF |
1870 | struct lock_manager nfsd4_manager = { |
1871 | }; | |
1872 | ||
a76b4319 | 1873 | static void |
af558e33 | 1874 | nfsd4_end_grace(void) |
a76b4319 N |
1875 | { |
1876 | dprintk("NFSD: end of grace period\n"); | |
c7b9a459 | 1877 | nfsd4_recdir_purge_old(); |
af558e33 | 1878 | locks_end_grace(&nfsd4_manager); |
a76b4319 N |
1879 | } |
1880 | ||
fd39ca9a | 1881 | static time_t |
1da177e4 LT |
1882 | nfs4_laundromat(void) |
1883 | { | |
1884 | struct nfs4_client *clp; | |
1885 | struct nfs4_stateowner *sop; | |
1886 | struct nfs4_delegation *dp; | |
1887 | struct list_head *pos, *next, reaplist; | |
1888 | time_t cutoff = get_seconds() - NFSD_LEASE_TIME; | |
1889 | time_t t, clientid_val = NFSD_LEASE_TIME; | |
1890 | time_t u, test_val = NFSD_LEASE_TIME; | |
1891 | ||
1892 | nfs4_lock_state(); | |
1893 | ||
1894 | dprintk("NFSD: laundromat service - starting\n"); | |
af558e33 BF |
1895 | if (locks_in_grace()) |
1896 | nfsd4_end_grace(); | |
1da177e4 LT |
1897 | list_for_each_safe(pos, next, &client_lru) { |
1898 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
1899 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { | |
1900 | t = clp->cl_time - cutoff; | |
1901 | if (clientid_val > t) | |
1902 | clientid_val = t; | |
1903 | break; | |
1904 | } | |
1905 | dprintk("NFSD: purging unused client (clientid %08x)\n", | |
1906 | clp->cl_clientid.cl_id); | |
c7b9a459 | 1907 | nfsd4_remove_clid_dir(clp); |
1da177e4 LT |
1908 | expire_client(clp); |
1909 | } | |
1910 | INIT_LIST_HEAD(&reaplist); | |
1911 | spin_lock(&recall_lock); | |
1912 | list_for_each_safe(pos, next, &del_recall_lru) { | |
1913 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
1914 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { | |
1915 | u = dp->dl_time - cutoff; | |
1916 | if (test_val > u) | |
1917 | test_val = u; | |
1918 | break; | |
1919 | } | |
1920 | dprintk("NFSD: purging unused delegation dp %p, fp %p\n", | |
1921 | dp, dp->dl_flock); | |
1922 | list_move(&dp->dl_recall_lru, &reaplist); | |
1923 | } | |
1924 | spin_unlock(&recall_lock); | |
1925 | list_for_each_safe(pos, next, &reaplist) { | |
1926 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
1927 | list_del_init(&dp->dl_recall_lru); | |
1928 | unhash_delegation(dp); | |
1929 | } | |
1930 | test_val = NFSD_LEASE_TIME; | |
1931 | list_for_each_safe(pos, next, &close_lru) { | |
1932 | sop = list_entry(pos, struct nfs4_stateowner, so_close_lru); | |
1933 | if (time_after((unsigned long)sop->so_time, (unsigned long)cutoff)) { | |
1934 | u = sop->so_time - cutoff; | |
1935 | if (test_val > u) | |
1936 | test_val = u; | |
1937 | break; | |
1938 | } | |
1939 | dprintk("NFSD: purging unused open stateowner (so_id %d)\n", | |
1940 | sop->so_id); | |
f044ff83 | 1941 | release_openowner(sop); |
1da177e4 LT |
1942 | } |
1943 | if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) | |
1944 | clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; | |
1945 | nfs4_unlock_state(); | |
1946 | return clientid_val; | |
1947 | } | |
1948 | ||
a254b246 HH |
1949 | static struct workqueue_struct *laundry_wq; |
1950 | static void laundromat_main(struct work_struct *); | |
1951 | static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main); | |
1952 | ||
1953 | static void | |
c4028958 | 1954 | laundromat_main(struct work_struct *not_used) |
1da177e4 LT |
1955 | { |
1956 | time_t t; | |
1957 | ||
1958 | t = nfs4_laundromat(); | |
1959 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); | |
58da282b | 1960 | queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); |
1da177e4 LT |
1961 | } |
1962 | ||
fd39ca9a | 1963 | static struct nfs4_stateowner * |
f8816512 N |
1964 | search_close_lru(u32 st_id, int flags) |
1965 | { | |
1da177e4 LT |
1966 | struct nfs4_stateowner *local = NULL; |
1967 | ||
1da177e4 LT |
1968 | if (flags & CLOSE_STATE) { |
1969 | list_for_each_entry(local, &close_lru, so_close_lru) { | |
1970 | if (local->so_id == st_id) | |
1971 | return local; | |
1972 | } | |
1973 | } | |
1974 | return NULL; | |
1975 | } | |
1976 | ||
1977 | static inline int | |
1978 | nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stateid *stp) | |
1979 | { | |
7eaa36e2 | 1980 | return fhp->fh_dentry->d_inode != stp->st_vfs_file->f_path.dentry->d_inode; |
1da177e4 LT |
1981 | } |
1982 | ||
1983 | static int | |
1984 | STALE_STATEID(stateid_t *stateid) | |
1985 | { | |
1986 | if (stateid->si_boot == boot_time) | |
1987 | return 0; | |
849823c5 | 1988 | dprintk("NFSD: stale stateid (%08x/%08x/%08x/%08x)!\n", |
1da177e4 LT |
1989 | stateid->si_boot, stateid->si_stateownerid, stateid->si_fileid, |
1990 | stateid->si_generation); | |
1991 | return 1; | |
1992 | } | |
1993 | ||
1994 | static inline int | |
1995 | access_permit_read(unsigned long access_bmap) | |
1996 | { | |
1997 | return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) || | |
1998 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) || | |
1999 | test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap); | |
2000 | } | |
2001 | ||
2002 | static inline int | |
2003 | access_permit_write(unsigned long access_bmap) | |
2004 | { | |
2005 | return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) || | |
2006 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap); | |
2007 | } | |
2008 | ||
2009 | static | |
b37ad28b | 2010 | __be32 nfs4_check_openmode(struct nfs4_stateid *stp, int flags) |
1da177e4 | 2011 | { |
b37ad28b | 2012 | __be32 status = nfserr_openmode; |
1da177e4 LT |
2013 | |
2014 | if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap))) | |
2015 | goto out; | |
2016 | if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap))) | |
2017 | goto out; | |
2018 | status = nfs_ok; | |
2019 | out: | |
2020 | return status; | |
2021 | } | |
2022 | ||
b37ad28b | 2023 | static inline __be32 |
1da177e4 LT |
2024 | check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags) |
2025 | { | |
203a8c8e | 2026 | if (ONE_STATEID(stateid) && (flags & RD_STATE)) |
1da177e4 | 2027 | return nfs_ok; |
af558e33 | 2028 | else if (locks_in_grace()) { |
1da177e4 LT |
2029 | /* Answer in remaining cases depends on existance of |
2030 | * conflicting state; so we must wait out the grace period. */ | |
2031 | return nfserr_grace; | |
2032 | } else if (flags & WR_STATE) | |
2033 | return nfs4_share_conflict(current_fh, | |
2034 | NFS4_SHARE_DENY_WRITE); | |
2035 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ | |
2036 | return nfs4_share_conflict(current_fh, | |
2037 | NFS4_SHARE_DENY_READ); | |
2038 | } | |
2039 | ||
2040 | /* | |
2041 | * Allow READ/WRITE during grace period on recovered state only for files | |
2042 | * that are not able to provide mandatory locking. | |
2043 | */ | |
2044 | static inline int | |
18f82731 | 2045 | grace_disallows_io(struct inode *inode) |
1da177e4 | 2046 | { |
203a8c8e | 2047 | return locks_in_grace() && mandatory_lock(inode); |
1da177e4 LT |
2048 | } |
2049 | ||
0836f587 BF |
2050 | static int check_stateid_generation(stateid_t *in, stateid_t *ref) |
2051 | { | |
2052 | /* If the client sends us a stateid from the future, it's buggy: */ | |
2053 | if (in->si_generation > ref->si_generation) | |
2054 | return nfserr_bad_stateid; | |
2055 | /* | |
2056 | * The following, however, can happen. For example, if the | |
2057 | * client sends an open and some IO at the same time, the open | |
2058 | * may bump si_generation while the IO is still in flight. | |
2059 | * Thanks to hard links and renames, the client never knows what | |
2060 | * file an open will affect. So it could avoid that situation | |
2061 | * only by serializing all opens and IO from the same open | |
2062 | * owner. To recover from the old_stateid error, the client | |
2063 | * will just have to retry the IO: | |
2064 | */ | |
2065 | if (in->si_generation < ref->si_generation) | |
2066 | return nfserr_old_stateid; | |
2067 | return nfs_ok; | |
2068 | } | |
2069 | ||
3e633079 BF |
2070 | static int is_delegation_stateid(stateid_t *stateid) |
2071 | { | |
2072 | return stateid->si_fileid == 0; | |
2073 | } | |
2074 | ||
1da177e4 LT |
2075 | /* |
2076 | * Checks for stateid operations | |
2077 | */ | |
b37ad28b | 2078 | __be32 |
1da177e4 LT |
2079 | nfs4_preprocess_stateid_op(struct svc_fh *current_fh, stateid_t *stateid, int flags, struct file **filpp) |
2080 | { | |
2081 | struct nfs4_stateid *stp = NULL; | |
2082 | struct nfs4_delegation *dp = NULL; | |
1da177e4 | 2083 | struct inode *ino = current_fh->fh_dentry->d_inode; |
b37ad28b | 2084 | __be32 status; |
1da177e4 | 2085 | |
1da177e4 LT |
2086 | if (filpp) |
2087 | *filpp = NULL; | |
2088 | ||
18f82731 | 2089 | if (grace_disallows_io(ino)) |
1da177e4 LT |
2090 | return nfserr_grace; |
2091 | ||
2092 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
2093 | return check_special_stateids(current_fh, stateid, flags); | |
2094 | ||
1da177e4 LT |
2095 | status = nfserr_stale_stateid; |
2096 | if (STALE_STATEID(stateid)) | |
2097 | goto out; | |
2098 | ||
1da177e4 | 2099 | status = nfserr_bad_stateid; |
3e633079 | 2100 | if (is_delegation_stateid(stateid)) { |
a4455be0 | 2101 | dp = find_delegation_stateid(ino, stateid); |
819a8f53 | 2102 | if (!dp) |
1da177e4 | 2103 | goto out; |
fd03b099 | 2104 | status = check_stateid_generation(stateid, &dp->dl_stateid); |
0c2a498f BF |
2105 | if (status) |
2106 | goto out; | |
dc9bf700 BF |
2107 | status = nfs4_check_delegmode(dp, flags); |
2108 | if (status) | |
2109 | goto out; | |
2110 | renew_client(dp->dl_client); | |
dc9bf700 BF |
2111 | if (filpp) |
2112 | *filpp = dp->dl_vfs_file; | |
1da177e4 | 2113 | } else { /* open or lock stateid */ |
a4455be0 | 2114 | stp = find_stateid(stateid, flags); |
819a8f53 | 2115 | if (!stp) |
1da177e4 | 2116 | goto out; |
6150ef0d | 2117 | if (nfs4_check_fh(current_fh, stp)) |
1da177e4 LT |
2118 | goto out; |
2119 | if (!stp->st_stateowner->so_confirmed) | |
2120 | goto out; | |
fd03b099 | 2121 | status = check_stateid_generation(stateid, &stp->st_stateid); |
0c2a498f BF |
2122 | if (status) |
2123 | goto out; | |
a4455be0 BF |
2124 | status = nfs4_check_openmode(stp, flags); |
2125 | if (status) | |
1da177e4 LT |
2126 | goto out; |
2127 | renew_client(stp->st_stateowner->so_client); | |
2128 | if (filpp) | |
2129 | *filpp = stp->st_vfs_file; | |
1da177e4 LT |
2130 | } |
2131 | status = nfs_ok; | |
2132 | out: | |
2133 | return status; | |
2134 | } | |
2135 | ||
4c4cd222 N |
2136 | static inline int |
2137 | setlkflg (int type) | |
2138 | { | |
2139 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? | |
2140 | RD_STATE : WR_STATE; | |
2141 | } | |
1da177e4 LT |
2142 | |
2143 | /* | |
2144 | * Checks for sequence id mutating operations. | |
2145 | */ | |
b37ad28b | 2146 | static __be32 |
4c4cd222 | 2147 | 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 | 2148 | { |
1da177e4 LT |
2149 | struct nfs4_stateid *stp; |
2150 | struct nfs4_stateowner *sop; | |
0836f587 | 2151 | __be32 status; |
1da177e4 LT |
2152 | |
2153 | dprintk("NFSD: preprocess_seqid_op: seqid=%d " | |
2154 | "stateid = (%08x/%08x/%08x/%08x)\n", seqid, | |
2155 | stateid->si_boot, stateid->si_stateownerid, stateid->si_fileid, | |
2156 | stateid->si_generation); | |
3a4f98bb | 2157 | |
1da177e4 LT |
2158 | *stpp = NULL; |
2159 | *sopp = NULL; | |
2160 | ||
1da177e4 | 2161 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) { |
2fdada03 | 2162 | dprintk("NFSD: preprocess_seqid_op: magic stateid!\n"); |
3a4f98bb | 2163 | return nfserr_bad_stateid; |
1da177e4 LT |
2164 | } |
2165 | ||
1da177e4 | 2166 | if (STALE_STATEID(stateid)) |
3a4f98bb | 2167 | return nfserr_stale_stateid; |
1da177e4 LT |
2168 | /* |
2169 | * We return BAD_STATEID if filehandle doesn't match stateid, | |
2170 | * the confirmed flag is incorrecly set, or the generation | |
2171 | * number is incorrect. | |
1da177e4 | 2172 | */ |
f8816512 N |
2173 | stp = find_stateid(stateid, flags); |
2174 | if (stp == NULL) { | |
2175 | /* | |
2176 | * Also, we should make sure this isn't just the result of | |
2177 | * a replayed close: | |
2178 | */ | |
2179 | sop = search_close_lru(stateid->si_stateownerid, flags); | |
2180 | if (sop == NULL) | |
2181 | return nfserr_bad_stateid; | |
2182 | *sopp = sop; | |
2183 | goto check_replay; | |
2184 | } | |
1da177e4 | 2185 | |
39325bd0 BF |
2186 | *stpp = stp; |
2187 | *sopp = sop = stp->st_stateowner; | |
2188 | ||
4c4cd222 | 2189 | if (lock) { |
4c4cd222 | 2190 | clientid_t *lockclid = &lock->v.new.clientid; |
1da177e4 | 2191 | struct nfs4_client *clp = sop->so_client; |
4c4cd222 | 2192 | int lkflg = 0; |
b37ad28b | 2193 | __be32 status; |
4c4cd222 N |
2194 | |
2195 | lkflg = setlkflg(lock->lk_type); | |
2196 | ||
2197 | if (lock->lk_is_new) { | |
599e0a22 BF |
2198 | if (!sop->so_is_open_owner) |
2199 | return nfserr_bad_stateid; | |
2200 | if (!same_clid(&clp->cl_clientid, lockclid)) | |
4c4cd222 | 2201 | return nfserr_bad_stateid; |
599e0a22 BF |
2202 | /* stp is the open stateid */ |
2203 | status = nfs4_check_openmode(stp, lkflg); | |
2204 | if (status) | |
2205 | return status; | |
2206 | } else { | |
2207 | /* stp is the lock stateid */ | |
2208 | status = nfs4_check_openmode(stp->st_openstp, lkflg); | |
2209 | if (status) | |
2210 | return status; | |
4c4cd222 | 2211 | } |
1da177e4 LT |
2212 | } |
2213 | ||
f3362737 | 2214 | if (nfs4_check_fh(current_fh, stp)) { |
2fdada03 | 2215 | dprintk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n"); |
3a4f98bb | 2216 | return nfserr_bad_stateid; |
1da177e4 LT |
2217 | } |
2218 | ||
1da177e4 LT |
2219 | /* |
2220 | * We now validate the seqid and stateid generation numbers. | |
2221 | * For the moment, we ignore the possibility of | |
2222 | * generation number wraparound. | |
2223 | */ | |
bd9aac52 | 2224 | if (seqid != sop->so_seqid) |
1da177e4 LT |
2225 | goto check_replay; |
2226 | ||
3a4f98bb | 2227 | if (sop->so_confirmed && flags & CONFIRM) { |
2fdada03 | 2228 | dprintk("NFSD: preprocess_seqid_op: expected" |
3a4f98bb N |
2229 | " unconfirmed stateowner!\n"); |
2230 | return nfserr_bad_stateid; | |
1da177e4 | 2231 | } |
3a4f98bb | 2232 | if (!sop->so_confirmed && !(flags & CONFIRM)) { |
2fdada03 | 2233 | dprintk("NFSD: preprocess_seqid_op: stateowner not" |
3a4f98bb N |
2234 | " confirmed yet!\n"); |
2235 | return nfserr_bad_stateid; | |
1da177e4 | 2236 | } |
0836f587 BF |
2237 | status = check_stateid_generation(stateid, &stp->st_stateid); |
2238 | if (status) | |
2239 | return status; | |
52fd004e | 2240 | renew_client(sop->so_client); |
3a4f98bb | 2241 | return nfs_ok; |
1da177e4 | 2242 | |
1da177e4 | 2243 | check_replay: |
bd9aac52 | 2244 | if (seqid == sop->so_seqid - 1) { |
849823c5 | 2245 | dprintk("NFSD: preprocess_seqid_op: retransmission?\n"); |
1da177e4 | 2246 | /* indicate replay to calling function */ |
a90b061c | 2247 | return nfserr_replay_me; |
1da177e4 | 2248 | } |
2fdada03 | 2249 | dprintk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d)\n", |
3a4f98bb N |
2250 | sop->so_seqid, seqid); |
2251 | *sopp = NULL; | |
2252 | return nfserr_bad_seqid; | |
1da177e4 LT |
2253 | } |
2254 | ||
b37ad28b | 2255 | __be32 |
ca364317 | 2256 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 2257 | struct nfsd4_open_confirm *oc) |
1da177e4 | 2258 | { |
b37ad28b | 2259 | __be32 status; |
1da177e4 LT |
2260 | struct nfs4_stateowner *sop; |
2261 | struct nfs4_stateid *stp; | |
2262 | ||
2263 | dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", | |
ca364317 BF |
2264 | (int)cstate->current_fh.fh_dentry->d_name.len, |
2265 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 2266 | |
ca364317 | 2267 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
a8cddc5d BF |
2268 | if (status) |
2269 | return status; | |
1da177e4 LT |
2270 | |
2271 | nfs4_lock_state(); | |
2272 | ||
ca364317 BF |
2273 | if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh, |
2274 | oc->oc_seqid, &oc->oc_req_stateid, | |
f3362737 | 2275 | CONFIRM | OPEN_STATE, |
1da177e4 LT |
2276 | &oc->oc_stateowner, &stp, NULL))) |
2277 | goto out; | |
2278 | ||
2279 | sop = oc->oc_stateowner; | |
2280 | sop->so_confirmed = 1; | |
2281 | update_stateid(&stp->st_stateid); | |
2282 | memcpy(&oc->oc_resp_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
2283 | dprintk("NFSD: nfsd4_open_confirm: success, seqid=%d " | |
2284 | "stateid=(%08x/%08x/%08x/%08x)\n", oc->oc_seqid, | |
2285 | stp->st_stateid.si_boot, | |
2286 | stp->st_stateid.si_stateownerid, | |
2287 | stp->st_stateid.si_fileid, | |
2288 | stp->st_stateid.si_generation); | |
c7b9a459 N |
2289 | |
2290 | nfsd4_create_clid_dir(sop->so_client); | |
1da177e4 | 2291 | out: |
f2327d9a | 2292 | if (oc->oc_stateowner) { |
1da177e4 | 2293 | nfs4_get_stateowner(oc->oc_stateowner); |
a4f1706a | 2294 | cstate->replay_owner = oc->oc_stateowner; |
f2327d9a | 2295 | } |
1da177e4 LT |
2296 | nfs4_unlock_state(); |
2297 | return status; | |
2298 | } | |
2299 | ||
2300 | ||
2301 | /* | |
2302 | * unset all bits in union bitmap (bmap) that | |
2303 | * do not exist in share (from successful OPEN_DOWNGRADE) | |
2304 | */ | |
2305 | static void | |
2306 | reset_union_bmap_access(unsigned long access, unsigned long *bmap) | |
2307 | { | |
2308 | int i; | |
2309 | for (i = 1; i < 4; i++) { | |
2310 | if ((i & access) != i) | |
2311 | __clear_bit(i, bmap); | |
2312 | } | |
2313 | } | |
2314 | ||
2315 | static void | |
2316 | reset_union_bmap_deny(unsigned long deny, unsigned long *bmap) | |
2317 | { | |
2318 | int i; | |
2319 | for (i = 0; i < 4; i++) { | |
2320 | if ((i & deny) != i) | |
2321 | __clear_bit(i, bmap); | |
2322 | } | |
2323 | } | |
2324 | ||
b37ad28b | 2325 | __be32 |
ca364317 BF |
2326 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
2327 | struct nfsd4_compound_state *cstate, | |
a4f1706a | 2328 | struct nfsd4_open_downgrade *od) |
1da177e4 | 2329 | { |
b37ad28b | 2330 | __be32 status; |
1da177e4 LT |
2331 | struct nfs4_stateid *stp; |
2332 | unsigned int share_access; | |
2333 | ||
2334 | dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", | |
ca364317 BF |
2335 | (int)cstate->current_fh.fh_dentry->d_name.len, |
2336 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 2337 | |
ba5a6a19 BF |
2338 | if (!access_valid(od->od_share_access) |
2339 | || !deny_valid(od->od_share_deny)) | |
1da177e4 LT |
2340 | return nfserr_inval; |
2341 | ||
2342 | nfs4_lock_state(); | |
ca364317 BF |
2343 | if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh, |
2344 | od->od_seqid, | |
1da177e4 | 2345 | &od->od_stateid, |
f3362737 | 2346 | OPEN_STATE, |
1da177e4 LT |
2347 | &od->od_stateowner, &stp, NULL))) |
2348 | goto out; | |
2349 | ||
2350 | status = nfserr_inval; | |
2351 | if (!test_bit(od->od_share_access, &stp->st_access_bmap)) { | |
2352 | dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n", | |
2353 | stp->st_access_bmap, od->od_share_access); | |
2354 | goto out; | |
2355 | } | |
2356 | if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) { | |
2357 | dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", | |
2358 | stp->st_deny_bmap, od->od_share_deny); | |
2359 | goto out; | |
2360 | } | |
2361 | set_access(&share_access, stp->st_access_bmap); | |
2362 | nfs4_file_downgrade(stp->st_vfs_file, | |
2363 | share_access & ~od->od_share_access); | |
2364 | ||
2365 | reset_union_bmap_access(od->od_share_access, &stp->st_access_bmap); | |
2366 | reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap); | |
2367 | ||
2368 | update_stateid(&stp->st_stateid); | |
2369 | memcpy(&od->od_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
2370 | status = nfs_ok; | |
2371 | out: | |
f2327d9a | 2372 | if (od->od_stateowner) { |
1da177e4 | 2373 | nfs4_get_stateowner(od->od_stateowner); |
a4f1706a | 2374 | cstate->replay_owner = od->od_stateowner; |
f2327d9a | 2375 | } |
1da177e4 LT |
2376 | nfs4_unlock_state(); |
2377 | return status; | |
2378 | } | |
2379 | ||
2380 | /* | |
2381 | * nfs4_unlock_state() called after encode | |
2382 | */ | |
b37ad28b | 2383 | __be32 |
ca364317 | 2384 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 2385 | struct nfsd4_close *close) |
1da177e4 | 2386 | { |
b37ad28b | 2387 | __be32 status; |
1da177e4 LT |
2388 | struct nfs4_stateid *stp; |
2389 | ||
2390 | dprintk("NFSD: nfsd4_close on file %.*s\n", | |
ca364317 BF |
2391 | (int)cstate->current_fh.fh_dentry->d_name.len, |
2392 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 LT |
2393 | |
2394 | nfs4_lock_state(); | |
2395 | /* check close_lru for replay */ | |
ca364317 BF |
2396 | if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh, |
2397 | close->cl_seqid, | |
1da177e4 | 2398 | &close->cl_stateid, |
f3362737 | 2399 | OPEN_STATE | CLOSE_STATE, |
1da177e4 LT |
2400 | &close->cl_stateowner, &stp, NULL))) |
2401 | goto out; | |
1da177e4 LT |
2402 | status = nfs_ok; |
2403 | update_stateid(&stp->st_stateid); | |
2404 | memcpy(&close->cl_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
2405 | ||
04ef5954 | 2406 | /* release_stateid() calls nfsd_close() if needed */ |
2283963f | 2407 | release_open_stateid(stp); |
04ef5954 BF |
2408 | |
2409 | /* place unused nfs4_stateowners on so_close_lru list to be | |
2410 | * released by the laundromat service after the lease period | |
2411 | * to enable us to handle CLOSE replay | |
2412 | */ | |
2413 | if (list_empty(&close->cl_stateowner->so_stateids)) | |
2414 | move_to_close_lru(close->cl_stateowner); | |
1da177e4 | 2415 | out: |
f2327d9a | 2416 | if (close->cl_stateowner) { |
1da177e4 | 2417 | nfs4_get_stateowner(close->cl_stateowner); |
a4f1706a | 2418 | cstate->replay_owner = close->cl_stateowner; |
f2327d9a | 2419 | } |
1da177e4 LT |
2420 | nfs4_unlock_state(); |
2421 | return status; | |
2422 | } | |
2423 | ||
b37ad28b | 2424 | __be32 |
ca364317 BF |
2425 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
2426 | struct nfsd4_delegreturn *dr) | |
1da177e4 | 2427 | { |
203a8c8e BF |
2428 | struct nfs4_delegation *dp; |
2429 | stateid_t *stateid = &dr->dr_stateid; | |
2430 | struct inode *inode; | |
b37ad28b | 2431 | __be32 status; |
1da177e4 | 2432 | |
ca364317 | 2433 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
203a8c8e BF |
2434 | return status; |
2435 | inode = cstate->current_fh.fh_dentry->d_inode; | |
1da177e4 LT |
2436 | |
2437 | nfs4_lock_state(); | |
203a8c8e BF |
2438 | status = nfserr_bad_stateid; |
2439 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
2440 | goto out; | |
2441 | status = nfserr_stale_stateid; | |
2442 | if (STALE_STATEID(stateid)) | |
2443 | goto out; | |
7e0f7cf5 | 2444 | status = nfserr_bad_stateid; |
203a8c8e BF |
2445 | if (!is_delegation_stateid(stateid)) |
2446 | goto out; | |
203a8c8e BF |
2447 | dp = find_delegation_stateid(inode, stateid); |
2448 | if (!dp) | |
2449 | goto out; | |
2450 | status = check_stateid_generation(stateid, &dp->dl_stateid); | |
2451 | if (status) | |
2452 | goto out; | |
2453 | renew_client(dp->dl_client); | |
2454 | ||
2455 | unhash_delegation(dp); | |
1da177e4 | 2456 | out: |
203a8c8e BF |
2457 | nfs4_unlock_state(); |
2458 | ||
1da177e4 LT |
2459 | return status; |
2460 | } | |
2461 | ||
2462 | ||
2463 | /* | |
2464 | * Lock owner state (byte-range locks) | |
2465 | */ | |
2466 | #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) | |
2467 | #define LOCK_HASH_BITS 8 | |
2468 | #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS) | |
2469 | #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1) | |
2470 | ||
87df4de8 BH |
2471 | static inline u64 |
2472 | end_offset(u64 start, u64 len) | |
2473 | { | |
2474 | u64 end; | |
2475 | ||
2476 | end = start + len; | |
2477 | return end >= start ? end: NFS4_MAX_UINT64; | |
2478 | } | |
2479 | ||
2480 | /* last octet in a range */ | |
2481 | static inline u64 | |
2482 | last_byte_offset(u64 start, u64 len) | |
2483 | { | |
2484 | u64 end; | |
2485 | ||
2486 | BUG_ON(!len); | |
2487 | end = start + len; | |
2488 | return end > start ? end - 1: NFS4_MAX_UINT64; | |
2489 | } | |
2490 | ||
1da177e4 LT |
2491 | #define lockownerid_hashval(id) \ |
2492 | ((id) & LOCK_HASH_MASK) | |
2493 | ||
2494 | static inline unsigned int | |
2495 | lock_ownerstr_hashval(struct inode *inode, u32 cl_id, | |
2496 | struct xdr_netobj *ownername) | |
2497 | { | |
2498 | return (file_hashval(inode) + cl_id | |
2499 | + opaque_hashval(ownername->data, ownername->len)) | |
2500 | & LOCK_HASH_MASK; | |
2501 | } | |
2502 | ||
2503 | static struct list_head lock_ownerid_hashtbl[LOCK_HASH_SIZE]; | |
2504 | static struct list_head lock_ownerstr_hashtbl[LOCK_HASH_SIZE]; | |
2505 | static struct list_head lockstateid_hashtbl[STATEID_HASH_SIZE]; | |
2506 | ||
fd39ca9a | 2507 | static struct nfs4_stateid * |
1da177e4 LT |
2508 | find_stateid(stateid_t *stid, int flags) |
2509 | { | |
9346eff0 | 2510 | struct nfs4_stateid *local; |
1da177e4 LT |
2511 | u32 st_id = stid->si_stateownerid; |
2512 | u32 f_id = stid->si_fileid; | |
2513 | unsigned int hashval; | |
2514 | ||
2515 | dprintk("NFSD: find_stateid flags 0x%x\n",flags); | |
9346eff0 | 2516 | if (flags & (LOCK_STATE | RD_STATE | WR_STATE)) { |
1da177e4 LT |
2517 | hashval = stateid_hashval(st_id, f_id); |
2518 | list_for_each_entry(local, &lockstateid_hashtbl[hashval], st_hash) { | |
2519 | if ((local->st_stateid.si_stateownerid == st_id) && | |
2520 | (local->st_stateid.si_fileid == f_id)) | |
2521 | return local; | |
2522 | } | |
2523 | } | |
9346eff0 KK |
2524 | |
2525 | if (flags & (OPEN_STATE | RD_STATE | WR_STATE)) { | |
1da177e4 LT |
2526 | hashval = stateid_hashval(st_id, f_id); |
2527 | list_for_each_entry(local, &stateid_hashtbl[hashval], st_hash) { | |
2528 | if ((local->st_stateid.si_stateownerid == st_id) && | |
2529 | (local->st_stateid.si_fileid == f_id)) | |
2530 | return local; | |
2531 | } | |
849823c5 | 2532 | } |
1da177e4 LT |
2533 | return NULL; |
2534 | } | |
2535 | ||
2536 | static struct nfs4_delegation * | |
2537 | find_delegation_stateid(struct inode *ino, stateid_t *stid) | |
2538 | { | |
13cd2184 N |
2539 | struct nfs4_file *fp; |
2540 | struct nfs4_delegation *dl; | |
1da177e4 LT |
2541 | |
2542 | dprintk("NFSD:find_delegation_stateid stateid=(%08x/%08x/%08x/%08x)\n", | |
2543 | stid->si_boot, stid->si_stateownerid, | |
2544 | stid->si_fileid, stid->si_generation); | |
2545 | ||
1da177e4 | 2546 | fp = find_file(ino); |
13cd2184 N |
2547 | if (!fp) |
2548 | return NULL; | |
2549 | dl = find_delegation_file(fp, stid); | |
2550 | put_nfs4_file(fp); | |
2551 | return dl; | |
1da177e4 LT |
2552 | } |
2553 | ||
2554 | /* | |
2555 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | |
2556 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | |
2557 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | |
2558 | * locking, this prevents us from being completely protocol-compliant. The | |
2559 | * real solution to this problem is to start using unsigned file offsets in | |
2560 | * the VFS, but this is a very deep change! | |
2561 | */ | |
2562 | static inline void | |
2563 | nfs4_transform_lock_offset(struct file_lock *lock) | |
2564 | { | |
2565 | if (lock->fl_start < 0) | |
2566 | lock->fl_start = OFFSET_MAX; | |
2567 | if (lock->fl_end < 0) | |
2568 | lock->fl_end = OFFSET_MAX; | |
2569 | } | |
2570 | ||
d5b9026a N |
2571 | /* Hack!: For now, we're defining this just so we can use a pointer to it |
2572 | * as a unique cookie to identify our (NFSv4's) posix locks. */ | |
e465a77f | 2573 | static struct lock_manager_operations nfsd_posix_mng_ops = { |
d5b9026a | 2574 | }; |
1da177e4 LT |
2575 | |
2576 | static inline void | |
2577 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | |
2578 | { | |
d5b9026a N |
2579 | struct nfs4_stateowner *sop; |
2580 | unsigned int hval; | |
1da177e4 | 2581 | |
d5b9026a N |
2582 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
2583 | sop = (struct nfs4_stateowner *) fl->fl_owner; | |
2584 | hval = lockownerid_hashval(sop->so_id); | |
1da177e4 LT |
2585 | kref_get(&sop->so_ref); |
2586 | deny->ld_sop = sop; | |
2587 | deny->ld_clientid = sop->so_client->cl_clientid; | |
d5b9026a N |
2588 | } else { |
2589 | deny->ld_sop = NULL; | |
2590 | deny->ld_clientid.cl_boot = 0; | |
2591 | deny->ld_clientid.cl_id = 0; | |
1da177e4 LT |
2592 | } |
2593 | deny->ld_start = fl->fl_start; | |
87df4de8 BH |
2594 | deny->ld_length = NFS4_MAX_UINT64; |
2595 | if (fl->fl_end != NFS4_MAX_UINT64) | |
1da177e4 LT |
2596 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
2597 | deny->ld_type = NFS4_READ_LT; | |
2598 | if (fl->fl_type != F_RDLCK) | |
2599 | deny->ld_type = NFS4_WRITE_LT; | |
2600 | } | |
2601 | ||
1da177e4 LT |
2602 | static struct nfs4_stateowner * |
2603 | find_lockstateowner_str(struct inode *inode, clientid_t *clid, | |
2604 | struct xdr_netobj *owner) | |
2605 | { | |
2606 | unsigned int hashval = lock_ownerstr_hashval(inode, clid->cl_id, owner); | |
2607 | struct nfs4_stateowner *op; | |
2608 | ||
2609 | list_for_each_entry(op, &lock_ownerstr_hashtbl[hashval], so_strhash) { | |
599e0a22 | 2610 | if (same_owner_str(op, owner, clid)) |
1da177e4 LT |
2611 | return op; |
2612 | } | |
2613 | return NULL; | |
2614 | } | |
2615 | ||
2616 | /* | |
2617 | * Alloc a lock owner structure. | |
2618 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | |
2619 | * occured. | |
2620 | * | |
2621 | * strhashval = lock_ownerstr_hashval | |
1da177e4 LT |
2622 | */ |
2623 | ||
2624 | static struct nfs4_stateowner * | |
2625 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_stateid *open_stp, struct nfsd4_lock *lock) { | |
2626 | struct nfs4_stateowner *sop; | |
2627 | struct nfs4_replay *rp; | |
2628 | unsigned int idhashval; | |
2629 | ||
2630 | if (!(sop = alloc_stateowner(&lock->lk_new_owner))) | |
2631 | return NULL; | |
2632 | idhashval = lockownerid_hashval(current_ownerid); | |
2633 | INIT_LIST_HEAD(&sop->so_idhash); | |
2634 | INIT_LIST_HEAD(&sop->so_strhash); | |
2635 | INIT_LIST_HEAD(&sop->so_perclient); | |
ea1da636 N |
2636 | INIT_LIST_HEAD(&sop->so_stateids); |
2637 | INIT_LIST_HEAD(&sop->so_perstateid); | |
1da177e4 LT |
2638 | INIT_LIST_HEAD(&sop->so_close_lru); /* not used */ |
2639 | sop->so_time = 0; | |
2640 | list_add(&sop->so_idhash, &lock_ownerid_hashtbl[idhashval]); | |
2641 | list_add(&sop->so_strhash, &lock_ownerstr_hashtbl[strhashval]); | |
ea1da636 | 2642 | list_add(&sop->so_perstateid, &open_stp->st_lockowners); |
1da177e4 LT |
2643 | sop->so_is_open_owner = 0; |
2644 | sop->so_id = current_ownerid++; | |
2645 | sop->so_client = clp; | |
b59e3c0e NB |
2646 | /* It is the openowner seqid that will be incremented in encode in the |
2647 | * case of new lockowners; so increment the lock seqid manually: */ | |
2648 | sop->so_seqid = lock->lk_new_lock_seqid + 1; | |
1da177e4 LT |
2649 | sop->so_confirmed = 1; |
2650 | rp = &sop->so_replay; | |
de1ae286 | 2651 | rp->rp_status = nfserr_serverfault; |
1da177e4 LT |
2652 | rp->rp_buflen = 0; |
2653 | rp->rp_buf = rp->rp_ibuf; | |
2654 | return sop; | |
2655 | } | |
2656 | ||
fd39ca9a | 2657 | static struct nfs4_stateid * |
1da177e4 LT |
2658 | alloc_init_lock_stateid(struct nfs4_stateowner *sop, struct nfs4_file *fp, struct nfs4_stateid *open_stp) |
2659 | { | |
2660 | struct nfs4_stateid *stp; | |
2661 | unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); | |
2662 | ||
5ac049ac N |
2663 | stp = nfs4_alloc_stateid(); |
2664 | if (stp == NULL) | |
1da177e4 LT |
2665 | goto out; |
2666 | INIT_LIST_HEAD(&stp->st_hash); | |
2667 | INIT_LIST_HEAD(&stp->st_perfile); | |
ea1da636 N |
2668 | INIT_LIST_HEAD(&stp->st_perstateowner); |
2669 | INIT_LIST_HEAD(&stp->st_lockowners); /* not used */ | |
1da177e4 | 2670 | list_add(&stp->st_hash, &lockstateid_hashtbl[hashval]); |
8beefa24 | 2671 | list_add(&stp->st_perfile, &fp->fi_stateids); |
ea1da636 | 2672 | list_add(&stp->st_perstateowner, &sop->so_stateids); |
1da177e4 | 2673 | stp->st_stateowner = sop; |
13cd2184 | 2674 | get_nfs4_file(fp); |
1da177e4 LT |
2675 | stp->st_file = fp; |
2676 | stp->st_stateid.si_boot = boot_time; | |
2677 | stp->st_stateid.si_stateownerid = sop->so_id; | |
2678 | stp->st_stateid.si_fileid = fp->fi_id; | |
2679 | stp->st_stateid.si_generation = 0; | |
2680 | stp->st_vfs_file = open_stp->st_vfs_file; /* FIXME refcount?? */ | |
2681 | stp->st_access_bmap = open_stp->st_access_bmap; | |
2682 | stp->st_deny_bmap = open_stp->st_deny_bmap; | |
4c4cd222 | 2683 | stp->st_openstp = open_stp; |
1da177e4 LT |
2684 | |
2685 | out: | |
2686 | return stp; | |
2687 | } | |
2688 | ||
fd39ca9a | 2689 | static int |
1da177e4 LT |
2690 | check_lock_length(u64 offset, u64 length) |
2691 | { | |
87df4de8 | 2692 | return ((length == 0) || ((length != NFS4_MAX_UINT64) && |
1da177e4 LT |
2693 | LOFF_OVERFLOW(offset, length))); |
2694 | } | |
2695 | ||
2696 | /* | |
2697 | * LOCK operation | |
2698 | */ | |
b37ad28b | 2699 | __be32 |
ca364317 | 2700 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 2701 | struct nfsd4_lock *lock) |
1da177e4 | 2702 | { |
3e9e3dbe | 2703 | struct nfs4_stateowner *open_sop = NULL; |
b59e3c0e | 2704 | struct nfs4_stateowner *lock_sop = NULL; |
1da177e4 LT |
2705 | struct nfs4_stateid *lock_stp; |
2706 | struct file *filp; | |
2707 | struct file_lock file_lock; | |
8dc7c311 | 2708 | struct file_lock conflock; |
b37ad28b | 2709 | __be32 status = 0; |
1da177e4 | 2710 | unsigned int strhashval; |
150b3934 | 2711 | unsigned int cmd; |
b8dd7b9a | 2712 | int err; |
1da177e4 LT |
2713 | |
2714 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | |
2715 | (long long) lock->lk_offset, | |
2716 | (long long) lock->lk_length); | |
2717 | ||
1da177e4 LT |
2718 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
2719 | return nfserr_inval; | |
2720 | ||
ca364317 | 2721 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
8837abca | 2722 | S_IFREG, NFSD_MAY_LOCK))) { |
a6f6ef2f AA |
2723 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
2724 | return status; | |
2725 | } | |
2726 | ||
1da177e4 LT |
2727 | nfs4_lock_state(); |
2728 | ||
2729 | if (lock->lk_is_new) { | |
893f8770 N |
2730 | /* |
2731 | * Client indicates that this is a new lockowner. | |
2732 | * Use open owner and open stateid to create lock owner and | |
2733 | * lock stateid. | |
2734 | */ | |
1da177e4 LT |
2735 | struct nfs4_stateid *open_stp = NULL; |
2736 | struct nfs4_file *fp; | |
2737 | ||
2738 | status = nfserr_stale_clientid; | |
849823c5 | 2739 | if (STALE_CLIENTID(&lock->lk_new_clientid)) |
1da177e4 | 2740 | goto out; |
1da177e4 | 2741 | |
1da177e4 | 2742 | /* validate and update open stateid and open seqid */ |
ca364317 | 2743 | status = nfs4_preprocess_seqid_op(&cstate->current_fh, |
1da177e4 LT |
2744 | lock->lk_new_open_seqid, |
2745 | &lock->lk_new_open_stateid, | |
f3362737 | 2746 | OPEN_STATE, |
3a65588a | 2747 | &lock->lk_replay_owner, &open_stp, |
b59e3c0e | 2748 | lock); |
37515177 | 2749 | if (status) |
1da177e4 | 2750 | goto out; |
3a65588a | 2751 | open_sop = lock->lk_replay_owner; |
1da177e4 LT |
2752 | /* create lockowner and lock stateid */ |
2753 | fp = open_stp->st_file; | |
2754 | strhashval = lock_ownerstr_hashval(fp->fi_inode, | |
2755 | open_sop->so_client->cl_clientid.cl_id, | |
2756 | &lock->v.new.owner); | |
3e9e3dbe N |
2757 | /* XXX: Do we need to check for duplicate stateowners on |
2758 | * the same file, or should they just be allowed (and | |
2759 | * create new stateids)? */ | |
1da177e4 | 2760 | status = nfserr_resource; |
b59e3c0e NB |
2761 | lock_sop = alloc_init_lock_stateowner(strhashval, |
2762 | open_sop->so_client, open_stp, lock); | |
2763 | if (lock_sop == NULL) | |
1da177e4 | 2764 | goto out; |
b59e3c0e | 2765 | lock_stp = alloc_init_lock_stateid(lock_sop, fp, open_stp); |
8a280510 | 2766 | if (lock_stp == NULL) |
1da177e4 | 2767 | goto out; |
1da177e4 LT |
2768 | } else { |
2769 | /* lock (lock owner + lock stateid) already exists */ | |
ca364317 | 2770 | status = nfs4_preprocess_seqid_op(&cstate->current_fh, |
1da177e4 LT |
2771 | lock->lk_old_lock_seqid, |
2772 | &lock->lk_old_lock_stateid, | |
f3362737 | 2773 | LOCK_STATE, |
3a65588a | 2774 | &lock->lk_replay_owner, &lock_stp, lock); |
1da177e4 LT |
2775 | if (status) |
2776 | goto out; | |
3a65588a | 2777 | lock_sop = lock->lk_replay_owner; |
1da177e4 | 2778 | } |
3a65588a | 2779 | /* lock->lk_replay_owner and lock_stp have been created or found */ |
1da177e4 LT |
2780 | filp = lock_stp->st_vfs_file; |
2781 | ||
0dd395dc | 2782 | status = nfserr_grace; |
af558e33 | 2783 | if (locks_in_grace() && !lock->lk_reclaim) |
0dd395dc N |
2784 | goto out; |
2785 | status = nfserr_no_grace; | |
af558e33 | 2786 | if (!locks_in_grace() && lock->lk_reclaim) |
0dd395dc N |
2787 | goto out; |
2788 | ||
1da177e4 LT |
2789 | locks_init_lock(&file_lock); |
2790 | switch (lock->lk_type) { | |
2791 | case NFS4_READ_LT: | |
2792 | case NFS4_READW_LT: | |
2793 | file_lock.fl_type = F_RDLCK; | |
150b3934 | 2794 | cmd = F_SETLK; |
1da177e4 LT |
2795 | break; |
2796 | case NFS4_WRITE_LT: | |
2797 | case NFS4_WRITEW_LT: | |
2798 | file_lock.fl_type = F_WRLCK; | |
150b3934 | 2799 | cmd = F_SETLK; |
1da177e4 LT |
2800 | break; |
2801 | default: | |
2802 | status = nfserr_inval; | |
2803 | goto out; | |
2804 | } | |
b59e3c0e | 2805 | file_lock.fl_owner = (fl_owner_t)lock_sop; |
1da177e4 LT |
2806 | file_lock.fl_pid = current->tgid; |
2807 | file_lock.fl_file = filp; | |
2808 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 2809 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
2810 | |
2811 | file_lock.fl_start = lock->lk_offset; | |
87df4de8 | 2812 | file_lock.fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); |
1da177e4 LT |
2813 | nfs4_transform_lock_offset(&file_lock); |
2814 | ||
2815 | /* | |
2816 | * Try to lock the file in the VFS. | |
2817 | * Note: locks.c uses the BKL to protect the inode's lock list. | |
2818 | */ | |
2819 | ||
fd85b817 | 2820 | err = vfs_lock_file(filp, cmd, &file_lock, &conflock); |
b8dd7b9a | 2821 | switch (-err) { |
1da177e4 LT |
2822 | case 0: /* success! */ |
2823 | update_stateid(&lock_stp->st_stateid); | |
2824 | memcpy(&lock->lk_resp_stateid, &lock_stp->st_stateid, | |
2825 | sizeof(stateid_t)); | |
b8dd7b9a | 2826 | status = 0; |
eb76b3fd AA |
2827 | break; |
2828 | case (EAGAIN): /* conflock holds conflicting lock */ | |
2829 | status = nfserr_denied; | |
2830 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | |
2831 | nfs4_set_lock_denied(&conflock, &lock->lk_denied); | |
2832 | break; | |
1da177e4 LT |
2833 | case (EDEADLK): |
2834 | status = nfserr_deadlock; | |
eb76b3fd | 2835 | break; |
1da177e4 | 2836 | default: |
fd85b817 | 2837 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
eb76b3fd AA |
2838 | status = nfserr_resource; |
2839 | break; | |
1da177e4 | 2840 | } |
1da177e4 | 2841 | out: |
8a280510 | 2842 | if (status && lock->lk_is_new && lock_sop) |
f044ff83 | 2843 | release_lockowner(lock_sop); |
3a65588a BF |
2844 | if (lock->lk_replay_owner) { |
2845 | nfs4_get_stateowner(lock->lk_replay_owner); | |
a4f1706a | 2846 | cstate->replay_owner = lock->lk_replay_owner; |
f2327d9a | 2847 | } |
1da177e4 LT |
2848 | nfs4_unlock_state(); |
2849 | return status; | |
2850 | } | |
2851 | ||
55ef1274 BF |
2852 | /* |
2853 | * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, | |
2854 | * so we do a temporary open here just to get an open file to pass to | |
2855 | * vfs_test_lock. (Arguably perhaps test_lock should be done with an | |
2856 | * inode operation.) | |
2857 | */ | |
2858 | static int nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) | |
2859 | { | |
2860 | struct file *file; | |
2861 | int err; | |
2862 | ||
2863 | err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); | |
2864 | if (err) | |
2865 | return err; | |
2866 | err = vfs_test_lock(file, lock); | |
2867 | nfsd_close(file); | |
2868 | return err; | |
2869 | } | |
2870 | ||
1da177e4 LT |
2871 | /* |
2872 | * LOCKT operation | |
2873 | */ | |
b37ad28b | 2874 | __be32 |
ca364317 BF |
2875 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
2876 | struct nfsd4_lockt *lockt) | |
1da177e4 LT |
2877 | { |
2878 | struct inode *inode; | |
1da177e4 | 2879 | struct file_lock file_lock; |
fd85b817 | 2880 | int error; |
b37ad28b | 2881 | __be32 status; |
1da177e4 | 2882 | |
af558e33 | 2883 | if (locks_in_grace()) |
1da177e4 LT |
2884 | return nfserr_grace; |
2885 | ||
2886 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | |
2887 | return nfserr_inval; | |
2888 | ||
2889 | lockt->lt_stateowner = NULL; | |
2890 | nfs4_lock_state(); | |
2891 | ||
2892 | status = nfserr_stale_clientid; | |
849823c5 | 2893 | if (STALE_CLIENTID(&lockt->lt_clientid)) |
1da177e4 | 2894 | goto out; |
1da177e4 | 2895 | |
ca364317 | 2896 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) { |
849823c5 | 2897 | dprintk("NFSD: nfsd4_lockt: fh_verify() failed!\n"); |
1da177e4 LT |
2898 | if (status == nfserr_symlink) |
2899 | status = nfserr_inval; | |
2900 | goto out; | |
2901 | } | |
2902 | ||
ca364317 | 2903 | inode = cstate->current_fh.fh_dentry->d_inode; |
1da177e4 LT |
2904 | locks_init_lock(&file_lock); |
2905 | switch (lockt->lt_type) { | |
2906 | case NFS4_READ_LT: | |
2907 | case NFS4_READW_LT: | |
2908 | file_lock.fl_type = F_RDLCK; | |
2909 | break; | |
2910 | case NFS4_WRITE_LT: | |
2911 | case NFS4_WRITEW_LT: | |
2912 | file_lock.fl_type = F_WRLCK; | |
2913 | break; | |
2914 | default: | |
2fdada03 | 2915 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
1da177e4 LT |
2916 | status = nfserr_inval; |
2917 | goto out; | |
2918 | } | |
2919 | ||
2920 | lockt->lt_stateowner = find_lockstateowner_str(inode, | |
2921 | &lockt->lt_clientid, &lockt->lt_owner); | |
2922 | if (lockt->lt_stateowner) | |
2923 | file_lock.fl_owner = (fl_owner_t)lockt->lt_stateowner; | |
2924 | file_lock.fl_pid = current->tgid; | |
2925 | file_lock.fl_flags = FL_POSIX; | |
2926 | ||
2927 | file_lock.fl_start = lockt->lt_offset; | |
87df4de8 | 2928 | file_lock.fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); |
1da177e4 LT |
2929 | |
2930 | nfs4_transform_lock_offset(&file_lock); | |
2931 | ||
1da177e4 | 2932 | status = nfs_ok; |
55ef1274 | 2933 | error = nfsd_test_lock(rqstp, &cstate->current_fh, &file_lock); |
fd85b817 ME |
2934 | if (error) { |
2935 | status = nfserrno(error); | |
2936 | goto out; | |
2937 | } | |
9d6a8c5c | 2938 | if (file_lock.fl_type != F_UNLCK) { |
1da177e4 | 2939 | status = nfserr_denied; |
9d6a8c5c | 2940 | nfs4_set_lock_denied(&file_lock, &lockt->lt_denied); |
1da177e4 LT |
2941 | } |
2942 | out: | |
2943 | nfs4_unlock_state(); | |
2944 | return status; | |
2945 | } | |
2946 | ||
b37ad28b | 2947 | __be32 |
ca364317 | 2948 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 2949 | struct nfsd4_locku *locku) |
1da177e4 LT |
2950 | { |
2951 | struct nfs4_stateid *stp; | |
2952 | struct file *filp = NULL; | |
2953 | struct file_lock file_lock; | |
b37ad28b | 2954 | __be32 status; |
b8dd7b9a | 2955 | int err; |
1da177e4 LT |
2956 | |
2957 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", | |
2958 | (long long) locku->lu_offset, | |
2959 | (long long) locku->lu_length); | |
2960 | ||
2961 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | |
2962 | return nfserr_inval; | |
2963 | ||
2964 | nfs4_lock_state(); | |
2965 | ||
ca364317 | 2966 | if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh, |
1da177e4 LT |
2967 | locku->lu_seqid, |
2968 | &locku->lu_stateid, | |
f3362737 | 2969 | LOCK_STATE, |
1da177e4 LT |
2970 | &locku->lu_stateowner, &stp, NULL))) |
2971 | goto out; | |
2972 | ||
2973 | filp = stp->st_vfs_file; | |
2974 | BUG_ON(!filp); | |
2975 | locks_init_lock(&file_lock); | |
2976 | file_lock.fl_type = F_UNLCK; | |
2977 | file_lock.fl_owner = (fl_owner_t) locku->lu_stateowner; | |
2978 | file_lock.fl_pid = current->tgid; | |
2979 | file_lock.fl_file = filp; | |
2980 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 2981 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
2982 | file_lock.fl_start = locku->lu_offset; |
2983 | ||
87df4de8 | 2984 | file_lock.fl_end = last_byte_offset(locku->lu_offset, locku->lu_length); |
1da177e4 LT |
2985 | nfs4_transform_lock_offset(&file_lock); |
2986 | ||
2987 | /* | |
2988 | * Try to unlock the file in the VFS. | |
2989 | */ | |
fd85b817 | 2990 | err = vfs_lock_file(filp, F_SETLK, &file_lock, NULL); |
b8dd7b9a | 2991 | if (err) { |
fd85b817 | 2992 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
1da177e4 LT |
2993 | goto out_nfserr; |
2994 | } | |
2995 | /* | |
2996 | * OK, unlock succeeded; the only thing left to do is update the stateid. | |
2997 | */ | |
2998 | update_stateid(&stp->st_stateid); | |
2999 | memcpy(&locku->lu_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
3000 | ||
3001 | out: | |
f2327d9a | 3002 | if (locku->lu_stateowner) { |
1da177e4 | 3003 | nfs4_get_stateowner(locku->lu_stateowner); |
a4f1706a | 3004 | cstate->replay_owner = locku->lu_stateowner; |
f2327d9a | 3005 | } |
1da177e4 LT |
3006 | nfs4_unlock_state(); |
3007 | return status; | |
3008 | ||
3009 | out_nfserr: | |
b8dd7b9a | 3010 | status = nfserrno(err); |
1da177e4 LT |
3011 | goto out; |
3012 | } | |
3013 | ||
3014 | /* | |
3015 | * returns | |
3016 | * 1: locks held by lockowner | |
3017 | * 0: no locks held by lockowner | |
3018 | */ | |
3019 | static int | |
3020 | check_for_locks(struct file *filp, struct nfs4_stateowner *lowner) | |
3021 | { | |
3022 | struct file_lock **flpp; | |
7eaa36e2 | 3023 | struct inode *inode = filp->f_path.dentry->d_inode; |
1da177e4 LT |
3024 | int status = 0; |
3025 | ||
3026 | lock_kernel(); | |
3027 | for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { | |
796dadfd | 3028 | if ((*flpp)->fl_owner == (fl_owner_t)lowner) { |
1da177e4 LT |
3029 | status = 1; |
3030 | goto out; | |
796dadfd | 3031 | } |
1da177e4 LT |
3032 | } |
3033 | out: | |
3034 | unlock_kernel(); | |
3035 | return status; | |
3036 | } | |
3037 | ||
b37ad28b | 3038 | __be32 |
b591480b BF |
3039 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
3040 | struct nfsd4_compound_state *cstate, | |
3041 | struct nfsd4_release_lockowner *rlockowner) | |
1da177e4 LT |
3042 | { |
3043 | clientid_t *clid = &rlockowner->rl_clientid; | |
3e9e3dbe N |
3044 | struct nfs4_stateowner *sop; |
3045 | struct nfs4_stateid *stp; | |
1da177e4 | 3046 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
3e9e3dbe N |
3047 | struct list_head matches; |
3048 | int i; | |
b37ad28b | 3049 | __be32 status; |
1da177e4 LT |
3050 | |
3051 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | |
3052 | clid->cl_boot, clid->cl_id); | |
3053 | ||
3054 | /* XXX check for lease expiration */ | |
3055 | ||
3056 | status = nfserr_stale_clientid; | |
849823c5 | 3057 | if (STALE_CLIENTID(clid)) |
1da177e4 | 3058 | return status; |
1da177e4 LT |
3059 | |
3060 | nfs4_lock_state(); | |
3061 | ||
3e9e3dbe N |
3062 | status = nfserr_locks_held; |
3063 | /* XXX: we're doing a linear search through all the lockowners. | |
3064 | * Yipes! For now we'll just hope clients aren't really using | |
3065 | * release_lockowner much, but eventually we have to fix these | |
3066 | * data structures. */ | |
3067 | INIT_LIST_HEAD(&matches); | |
3068 | for (i = 0; i < LOCK_HASH_SIZE; i++) { | |
3069 | list_for_each_entry(sop, &lock_ownerid_hashtbl[i], so_idhash) { | |
599e0a22 | 3070 | if (!same_owner_str(sop, owner, clid)) |
3e9e3dbe N |
3071 | continue; |
3072 | list_for_each_entry(stp, &sop->so_stateids, | |
3073 | st_perstateowner) { | |
3074 | if (check_for_locks(stp->st_vfs_file, sop)) | |
3075 | goto out; | |
3076 | /* Note: so_perclient unused for lockowners, | |
3077 | * so it's OK to fool with here. */ | |
3078 | list_add(&sop->so_perclient, &matches); | |
3079 | } | |
1da177e4 | 3080 | } |
3e9e3dbe N |
3081 | } |
3082 | /* Clients probably won't expect us to return with some (but not all) | |
3083 | * of the lockowner state released; so don't release any until all | |
3084 | * have been checked. */ | |
3085 | status = nfs_ok; | |
0fa822e4 N |
3086 | while (!list_empty(&matches)) { |
3087 | sop = list_entry(matches.next, struct nfs4_stateowner, | |
3088 | so_perclient); | |
3089 | /* unhash_stateowner deletes so_perclient only | |
3090 | * for openowners. */ | |
3091 | list_del(&sop->so_perclient); | |
f044ff83 | 3092 | release_lockowner(sop); |
1da177e4 LT |
3093 | } |
3094 | out: | |
3095 | nfs4_unlock_state(); | |
3096 | return status; | |
3097 | } | |
3098 | ||
3099 | static inline struct nfs4_client_reclaim * | |
a55370a3 | 3100 | alloc_reclaim(void) |
1da177e4 | 3101 | { |
a55370a3 | 3102 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
1da177e4 LT |
3103 | } |
3104 | ||
c7b9a459 N |
3105 | int |
3106 | nfs4_has_reclaimed_state(const char *name) | |
3107 | { | |
3108 | unsigned int strhashval = clientstr_hashval(name); | |
3109 | struct nfs4_client *clp; | |
3110 | ||
3111 | clp = find_confirmed_client_by_str(name, strhashval); | |
3112 | return clp ? 1 : 0; | |
3113 | } | |
3114 | ||
1da177e4 LT |
3115 | /* |
3116 | * failure => all reset bets are off, nfserr_no_grace... | |
3117 | */ | |
190e4fbf N |
3118 | int |
3119 | nfs4_client_to_reclaim(const char *name) | |
1da177e4 LT |
3120 | { |
3121 | unsigned int strhashval; | |
3122 | struct nfs4_client_reclaim *crp = NULL; | |
3123 | ||
a55370a3 N |
3124 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
3125 | crp = alloc_reclaim(); | |
1da177e4 LT |
3126 | if (!crp) |
3127 | return 0; | |
a55370a3 | 3128 | strhashval = clientstr_hashval(name); |
1da177e4 LT |
3129 | INIT_LIST_HEAD(&crp->cr_strhash); |
3130 | list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); | |
a55370a3 | 3131 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
1da177e4 LT |
3132 | reclaim_str_hashtbl_size++; |
3133 | return 1; | |
3134 | } | |
3135 | ||
3136 | static void | |
3137 | nfs4_release_reclaim(void) | |
3138 | { | |
3139 | struct nfs4_client_reclaim *crp = NULL; | |
3140 | int i; | |
3141 | ||
1da177e4 LT |
3142 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
3143 | while (!list_empty(&reclaim_str_hashtbl[i])) { | |
3144 | crp = list_entry(reclaim_str_hashtbl[i].next, | |
3145 | struct nfs4_client_reclaim, cr_strhash); | |
3146 | list_del(&crp->cr_strhash); | |
1da177e4 LT |
3147 | kfree(crp); |
3148 | reclaim_str_hashtbl_size--; | |
3149 | } | |
3150 | } | |
3151 | BUG_ON(reclaim_str_hashtbl_size); | |
3152 | } | |
3153 | ||
3154 | /* | |
3155 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | |
fd39ca9a | 3156 | static struct nfs4_client_reclaim * |
1da177e4 LT |
3157 | nfs4_find_reclaim_client(clientid_t *clid) |
3158 | { | |
3159 | unsigned int strhashval; | |
3160 | struct nfs4_client *clp; | |
3161 | struct nfs4_client_reclaim *crp = NULL; | |
3162 | ||
3163 | ||
3164 | /* find clientid in conf_id_hashtbl */ | |
3165 | clp = find_confirmed_client(clid); | |
3166 | if (clp == NULL) | |
3167 | return NULL; | |
3168 | ||
a55370a3 N |
3169 | dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", |
3170 | clp->cl_name.len, clp->cl_name.data, | |
3171 | clp->cl_recdir); | |
1da177e4 LT |
3172 | |
3173 | /* find clp->cl_name in reclaim_str_hashtbl */ | |
a55370a3 | 3174 | strhashval = clientstr_hashval(clp->cl_recdir); |
1da177e4 | 3175 | list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { |
a55370a3 | 3176 | if (same_name(crp->cr_recdir, clp->cl_recdir)) { |
1da177e4 LT |
3177 | return crp; |
3178 | } | |
3179 | } | |
3180 | return NULL; | |
3181 | } | |
3182 | ||
3183 | /* | |
3184 | * Called from OPEN. Look for clientid in reclaim list. | |
3185 | */ | |
b37ad28b | 3186 | __be32 |
1da177e4 LT |
3187 | nfs4_check_open_reclaim(clientid_t *clid) |
3188 | { | |
dfc83565 | 3189 | return nfs4_find_reclaim_client(clid) ? nfs_ok : nfserr_reclaim_bad; |
1da177e4 LT |
3190 | } |
3191 | ||
ac4d8ff2 | 3192 | /* initialization to perform at module load time: */ |
1da177e4 | 3193 | |
e8ff2a84 | 3194 | int |
ac4d8ff2 | 3195 | nfs4_state_init(void) |
1da177e4 | 3196 | { |
e8ff2a84 | 3197 | int i, status; |
1da177e4 | 3198 | |
e8ff2a84 BF |
3199 | status = nfsd4_init_slabs(); |
3200 | if (status) | |
3201 | return status; | |
1da177e4 LT |
3202 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
3203 | INIT_LIST_HEAD(&conf_id_hashtbl[i]); | |
3204 | INIT_LIST_HEAD(&conf_str_hashtbl[i]); | |
3205 | INIT_LIST_HEAD(&unconf_str_hashtbl[i]); | |
3206 | INIT_LIST_HEAD(&unconf_id_hashtbl[i]); | |
3207 | } | |
3208 | for (i = 0; i < FILE_HASH_SIZE; i++) { | |
3209 | INIT_LIST_HEAD(&file_hashtbl[i]); | |
3210 | } | |
3211 | for (i = 0; i < OWNER_HASH_SIZE; i++) { | |
3212 | INIT_LIST_HEAD(&ownerstr_hashtbl[i]); | |
3213 | INIT_LIST_HEAD(&ownerid_hashtbl[i]); | |
3214 | } | |
3215 | for (i = 0; i < STATEID_HASH_SIZE; i++) { | |
3216 | INIT_LIST_HEAD(&stateid_hashtbl[i]); | |
3217 | INIT_LIST_HEAD(&lockstateid_hashtbl[i]); | |
3218 | } | |
3219 | for (i = 0; i < LOCK_HASH_SIZE; i++) { | |
3220 | INIT_LIST_HEAD(&lock_ownerid_hashtbl[i]); | |
3221 | INIT_LIST_HEAD(&lock_ownerstr_hashtbl[i]); | |
3222 | } | |
1da177e4 | 3223 | memset(&onestateid, ~0, sizeof(stateid_t)); |
1da177e4 LT |
3224 | INIT_LIST_HEAD(&close_lru); |
3225 | INIT_LIST_HEAD(&client_lru); | |
3226 | INIT_LIST_HEAD(&del_recall_lru); | |
ac4d8ff2 N |
3227 | for (i = 0; i < CLIENT_HASH_SIZE; i++) |
3228 | INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); | |
3229 | reclaim_str_hashtbl_size = 0; | |
e8ff2a84 | 3230 | return 0; |
ac4d8ff2 N |
3231 | } |
3232 | ||
190e4fbf N |
3233 | static void |
3234 | nfsd4_load_reboot_recovery_data(void) | |
3235 | { | |
3236 | int status; | |
3237 | ||
0964a3d3 N |
3238 | nfs4_lock_state(); |
3239 | nfsd4_init_recdir(user_recovery_dirname); | |
190e4fbf | 3240 | status = nfsd4_recdir_load(); |
0964a3d3 | 3241 | nfs4_unlock_state(); |
190e4fbf N |
3242 | if (status) |
3243 | printk("NFSD: Failure reading reboot recovery data\n"); | |
3244 | } | |
3245 | ||
9a8db97e ME |
3246 | unsigned long |
3247 | get_nfs4_grace_period(void) | |
3248 | { | |
3249 | return max(user_lease_time, lease_time) * HZ; | |
3250 | } | |
3251 | ||
c2f1a551 MS |
3252 | /* |
3253 | * Since the lifetime of a delegation isn't limited to that of an open, a | |
3254 | * client may quite reasonably hang on to a delegation as long as it has | |
3255 | * the inode cached. This becomes an obvious problem the first time a | |
3256 | * client's inode cache approaches the size of the server's total memory. | |
3257 | * | |
3258 | * For now we avoid this problem by imposing a hard limit on the number | |
3259 | * of delegations, which varies according to the server's memory size. | |
3260 | */ | |
3261 | static void | |
3262 | set_max_delegations(void) | |
3263 | { | |
3264 | /* | |
3265 | * Allow at most 4 delegations per megabyte of RAM. Quick | |
3266 | * estimates suggest that in the worst case (where every delegation | |
3267 | * is for a different inode), a delegation could take about 1.5K, | |
3268 | * giving a worst case usage of about 6% of memory. | |
3269 | */ | |
3270 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); | |
3271 | } | |
3272 | ||
ac4d8ff2 N |
3273 | /* initialization to perform when the nfsd service is started: */ |
3274 | ||
3275 | static void | |
3276 | __nfs4_state_start(void) | |
3277 | { | |
9a8db97e | 3278 | unsigned long grace_time; |
ac4d8ff2 | 3279 | |
1da177e4 | 3280 | boot_time = get_seconds(); |
af558e33 | 3281 | grace_time = get_nfs4_grace_period(); |
d99a05ad | 3282 | lease_time = user_lease_time; |
af558e33 | 3283 | locks_start_grace(&nfsd4_manager); |
9a8db97e ME |
3284 | printk(KERN_INFO "NFSD: starting %ld-second grace period\n", |
3285 | grace_time/HZ); | |
58da282b | 3286 | laundry_wq = create_singlethread_workqueue("nfsd4"); |
9a8db97e | 3287 | queue_delayed_work(laundry_wq, &laundromat_work, grace_time); |
c2f1a551 | 3288 | set_max_delegations(); |
1da177e4 LT |
3289 | } |
3290 | ||
e8ff2a84 | 3291 | void |
76a3550e | 3292 | nfs4_state_start(void) |
1da177e4 | 3293 | { |
1da177e4 | 3294 | if (nfs4_init) |
e8ff2a84 | 3295 | return; |
190e4fbf | 3296 | nfsd4_load_reboot_recovery_data(); |
76a3550e | 3297 | __nfs4_state_start(); |
1da177e4 | 3298 | nfs4_init = 1; |
e8ff2a84 | 3299 | return; |
1da177e4 LT |
3300 | } |
3301 | ||
1da177e4 LT |
3302 | time_t |
3303 | nfs4_lease_time(void) | |
3304 | { | |
3305 | return lease_time; | |
3306 | } | |
3307 | ||
3308 | static void | |
3309 | __nfs4_state_shutdown(void) | |
3310 | { | |
3311 | int i; | |
3312 | struct nfs4_client *clp = NULL; | |
3313 | struct nfs4_delegation *dp = NULL; | |
1da177e4 LT |
3314 | struct list_head *pos, *next, reaplist; |
3315 | ||
1da177e4 LT |
3316 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
3317 | while (!list_empty(&conf_id_hashtbl[i])) { | |
3318 | clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
3319 | expire_client(clp); | |
3320 | } | |
3321 | while (!list_empty(&unconf_str_hashtbl[i])) { | |
3322 | clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); | |
3323 | expire_client(clp); | |
3324 | } | |
3325 | } | |
3326 | INIT_LIST_HEAD(&reaplist); | |
3327 | spin_lock(&recall_lock); | |
3328 | list_for_each_safe(pos, next, &del_recall_lru) { | |
3329 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
3330 | list_move(&dp->dl_recall_lru, &reaplist); | |
3331 | } | |
3332 | spin_unlock(&recall_lock); | |
3333 | list_for_each_safe(pos, next, &reaplist) { | |
3334 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
3335 | list_del_init(&dp->dl_recall_lru); | |
3336 | unhash_delegation(dp); | |
3337 | } | |
3338 | ||
190e4fbf | 3339 | nfsd4_shutdown_recdir(); |
1da177e4 | 3340 | nfs4_init = 0; |
1da177e4 LT |
3341 | } |
3342 | ||
3343 | void | |
3344 | nfs4_state_shutdown(void) | |
3345 | { | |
5e8d5c29 N |
3346 | cancel_rearming_delayed_workqueue(laundry_wq, &laundromat_work); |
3347 | destroy_workqueue(laundry_wq); | |
2c5e7615 | 3348 | locks_end_grace(&nfsd4_manager); |
1da177e4 LT |
3349 | nfs4_lock_state(); |
3350 | nfs4_release_reclaim(); | |
3351 | __nfs4_state_shutdown(); | |
1da177e4 LT |
3352 | nfs4_unlock_state(); |
3353 | } | |
3354 | ||
3dd98a3b JL |
3355 | /* |
3356 | * user_recovery_dirname is protected by the nfsd_mutex since it's only | |
3357 | * accessed when nfsd is starting. | |
3358 | */ | |
0964a3d3 N |
3359 | static void |
3360 | nfs4_set_recdir(char *recdir) | |
3361 | { | |
0964a3d3 | 3362 | strcpy(user_recovery_dirname, recdir); |
0964a3d3 N |
3363 | } |
3364 | ||
3365 | /* | |
3366 | * Change the NFSv4 recovery directory to recdir. | |
3367 | */ | |
3368 | int | |
3369 | nfs4_reset_recoverydir(char *recdir) | |
3370 | { | |
3371 | int status; | |
a63bb996 | 3372 | struct path path; |
0964a3d3 | 3373 | |
a63bb996 | 3374 | status = kern_path(recdir, LOOKUP_FOLLOW, &path); |
0964a3d3 N |
3375 | if (status) |
3376 | return status; | |
3377 | status = -ENOTDIR; | |
a63bb996 | 3378 | if (S_ISDIR(path.dentry->d_inode->i_mode)) { |
0964a3d3 N |
3379 | nfs4_set_recdir(recdir); |
3380 | status = 0; | |
3381 | } | |
a63bb996 | 3382 | path_put(&path); |
0964a3d3 N |
3383 | return status; |
3384 | } | |
3385 | ||
3dd98a3b JL |
3386 | char * |
3387 | nfs4_recoverydir(void) | |
3388 | { | |
3389 | return user_recovery_dirname; | |
3390 | } | |
3391 | ||
1da177e4 LT |
3392 | /* |
3393 | * Called when leasetime is changed. | |
3394 | * | |
d99a05ad N |
3395 | * The only way the protocol gives us to handle on-the-fly lease changes is to |
3396 | * simulate a reboot. Instead of doing that, we just wait till the next time | |
3397 | * we start to register any changes in lease time. If the administrator | |
3398 | * really wants to change the lease time *now*, they can go ahead and bring | |
3399 | * nfsd down and then back up again after changing the lease time. | |
3dd98a3b JL |
3400 | * |
3401 | * user_lease_time is protected by nfsd_mutex since it's only really accessed | |
3402 | * when nfsd is starting | |
1da177e4 LT |
3403 | */ |
3404 | void | |
3405 | nfs4_reset_lease(time_t leasetime) | |
3406 | { | |
d99a05ad | 3407 | user_lease_time = leasetime; |
1da177e4 | 3408 | } |