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1 | /* | |
2 | * linux/fs/nfsd/nfs4state.c | |
3 | * | |
4 | * Copyright (c) 2001 The Regents of the University of Michigan. | |
5 | * All rights reserved. | |
6 | * | |
7 | * Kendrick Smith <kmsmith@umich.edu> | |
8 | * Andy Adamson <kandros@umich.edu> | |
9 | * | |
10 | * Redistribution and use in source and binary forms, with or without | |
11 | * modification, are permitted provided that the following conditions | |
12 | * are met: | |
13 | * | |
14 | * 1. Redistributions of source code must retain the above copyright | |
15 | * notice, this list of conditions and the following disclaimer. | |
16 | * 2. Redistributions in binary form must reproduce the above copyright | |
17 | * notice, this list of conditions and the following disclaimer in the | |
18 | * documentation and/or other materials provided with the distribution. | |
19 | * 3. Neither the name of the University nor the names of its | |
20 | * contributors may be used to endorse or promote products derived | |
21 | * from this software without specific prior written permission. | |
22 | * | |
23 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
24 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
25 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
26 | * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
27 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
28 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
29 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR | |
30 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
31 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
32 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
33 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
34 | * | |
35 | */ | |
36 | ||
37 | #include <linux/param.h> | |
38 | #include <linux/major.h> | |
39 | #include <linux/slab.h> | |
40 | ||
41 | #include <linux/sunrpc/svc.h> | |
42 | #include <linux/nfsd/nfsd.h> | |
43 | #include <linux/nfsd/cache.h> | |
44 | #include <linux/mount.h> | |
45 | #include <linux/workqueue.h> | |
46 | #include <linux/smp_lock.h> | |
47 | #include <linux/kthread.h> | |
48 | #include <linux/nfs4.h> | |
49 | #include <linux/nfsd/state.h> | |
50 | #include <linux/nfsd/xdr4.h> | |
51 | #include <linux/namei.h> | |
52 | #include <linux/swap.h> | |
53 | #include <linux/mutex.h> | |
54 | #include <linux/lockd/bind.h> | |
55 | #include <linux/module.h> | |
56 | ||
57 | #define NFSDDBG_FACILITY NFSDDBG_PROC | |
58 | ||
59 | /* Globals */ | |
60 | static time_t lease_time = 90; /* default lease time */ | |
61 | static time_t user_lease_time = 90; | |
62 | static time_t boot_time; | |
63 | static int in_grace = 1; | |
64 | static u32 current_ownerid = 1; | |
65 | static u32 current_fileid = 1; | |
66 | static u32 current_delegid = 1; | |
67 | static u32 nfs4_init; | |
68 | static stateid_t zerostateid; /* bits all 0 */ | |
69 | static stateid_t onestateid; /* bits all 1 */ | |
70 | ||
71 | #define ZERO_STATEID(stateid) (!memcmp((stateid), &zerostateid, sizeof(stateid_t))) | |
72 | #define ONE_STATEID(stateid) (!memcmp((stateid), &onestateid, sizeof(stateid_t))) | |
73 | ||
74 | /* forward declarations */ | |
75 | static struct nfs4_stateid * find_stateid(stateid_t *stid, int flags); | |
76 | static struct nfs4_delegation * find_delegation_stateid(struct inode *ino, stateid_t *stid); | |
77 | static void release_stateid_lockowners(struct nfs4_stateid *open_stp); | |
78 | static char user_recovery_dirname[PATH_MAX] = "/var/lib/nfs/v4recovery"; | |
79 | static void nfs4_set_recdir(char *recdir); | |
80 | ||
81 | /* Locking: | |
82 | * | |
83 | * client_mutex: | |
84 | * protects clientid_hashtbl[], clientstr_hashtbl[], | |
85 | * unconfstr_hashtbl[], uncofid_hashtbl[]. | |
86 | */ | |
87 | static DEFINE_MUTEX(client_mutex); | |
88 | ||
89 | static struct kmem_cache *stateowner_slab = NULL; | |
90 | static struct kmem_cache *file_slab = NULL; | |
91 | static struct kmem_cache *stateid_slab = NULL; | |
92 | static struct kmem_cache *deleg_slab = NULL; | |
93 | ||
94 | void | |
95 | nfs4_lock_state(void) | |
96 | { | |
97 | mutex_lock(&client_mutex); | |
98 | } | |
99 | ||
100 | void | |
101 | nfs4_unlock_state(void) | |
102 | { | |
103 | mutex_unlock(&client_mutex); | |
104 | } | |
105 | ||
106 | static inline u32 | |
107 | opaque_hashval(const void *ptr, int nbytes) | |
108 | { | |
109 | unsigned char *cptr = (unsigned char *) ptr; | |
110 | ||
111 | u32 x = 0; | |
112 | while (nbytes--) { | |
113 | x *= 37; | |
114 | x += *cptr++; | |
115 | } | |
116 | return x; | |
117 | } | |
118 | ||
119 | /* forward declarations */ | |
120 | static void release_stateowner(struct nfs4_stateowner *sop); | |
121 | static void release_stateid(struct nfs4_stateid *stp, int flags); | |
122 | ||
123 | /* | |
124 | * Delegation state | |
125 | */ | |
126 | ||
127 | /* recall_lock protects the del_recall_lru */ | |
128 | static DEFINE_SPINLOCK(recall_lock); | |
129 | static struct list_head del_recall_lru; | |
130 | ||
131 | static void | |
132 | free_nfs4_file(struct kref *kref) | |
133 | { | |
134 | struct nfs4_file *fp = container_of(kref, struct nfs4_file, fi_ref); | |
135 | list_del(&fp->fi_hash); | |
136 | iput(fp->fi_inode); | |
137 | kmem_cache_free(file_slab, fp); | |
138 | } | |
139 | ||
140 | static inline void | |
141 | put_nfs4_file(struct nfs4_file *fi) | |
142 | { | |
143 | kref_put(&fi->fi_ref, free_nfs4_file); | |
144 | } | |
145 | ||
146 | static inline void | |
147 | get_nfs4_file(struct nfs4_file *fi) | |
148 | { | |
149 | kref_get(&fi->fi_ref); | |
150 | } | |
151 | ||
152 | static int num_delegations; | |
153 | unsigned int max_delegations; | |
154 | ||
155 | /* | |
156 | * Open owner state (share locks) | |
157 | */ | |
158 | ||
159 | /* hash tables for nfs4_stateowner */ | |
160 | #define OWNER_HASH_BITS 8 | |
161 | #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) | |
162 | #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) | |
163 | ||
164 | #define ownerid_hashval(id) \ | |
165 | ((id) & OWNER_HASH_MASK) | |
166 | #define ownerstr_hashval(clientid, ownername) \ | |
167 | (((clientid) + opaque_hashval((ownername.data), (ownername.len))) & OWNER_HASH_MASK) | |
168 | ||
169 | static struct list_head ownerid_hashtbl[OWNER_HASH_SIZE]; | |
170 | static struct list_head ownerstr_hashtbl[OWNER_HASH_SIZE]; | |
171 | ||
172 | /* hash table for nfs4_file */ | |
173 | #define FILE_HASH_BITS 8 | |
174 | #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) | |
175 | #define FILE_HASH_MASK (FILE_HASH_SIZE - 1) | |
176 | /* hash table for (open)nfs4_stateid */ | |
177 | #define STATEID_HASH_BITS 10 | |
178 | #define STATEID_HASH_SIZE (1 << STATEID_HASH_BITS) | |
179 | #define STATEID_HASH_MASK (STATEID_HASH_SIZE - 1) | |
180 | ||
181 | #define file_hashval(x) \ | |
182 | hash_ptr(x, FILE_HASH_BITS) | |
183 | #define stateid_hashval(owner_id, file_id) \ | |
184 | (((owner_id) + (file_id)) & STATEID_HASH_MASK) | |
185 | ||
186 | static struct list_head file_hashtbl[FILE_HASH_SIZE]; | |
187 | static struct list_head stateid_hashtbl[STATEID_HASH_SIZE]; | |
188 | ||
189 | static struct nfs4_delegation * | |
190 | alloc_init_deleg(struct nfs4_client *clp, struct nfs4_stateid *stp, struct svc_fh *current_fh, u32 type) | |
191 | { | |
192 | struct nfs4_delegation *dp; | |
193 | struct nfs4_file *fp = stp->st_file; | |
194 | struct nfs4_callback *cb = &stp->st_stateowner->so_client->cl_callback; | |
195 | ||
196 | dprintk("NFSD alloc_init_deleg\n"); | |
197 | if (fp->fi_had_conflict) | |
198 | return NULL; | |
199 | if (num_delegations > max_delegations) | |
200 | return NULL; | |
201 | dp = kmem_cache_alloc(deleg_slab, GFP_KERNEL); | |
202 | if (dp == NULL) | |
203 | return dp; | |
204 | num_delegations++; | |
205 | INIT_LIST_HEAD(&dp->dl_perfile); | |
206 | INIT_LIST_HEAD(&dp->dl_perclnt); | |
207 | INIT_LIST_HEAD(&dp->dl_recall_lru); | |
208 | dp->dl_client = clp; | |
209 | get_nfs4_file(fp); | |
210 | dp->dl_file = fp; | |
211 | dp->dl_flock = NULL; | |
212 | get_file(stp->st_vfs_file); | |
213 | dp->dl_vfs_file = stp->st_vfs_file; | |
214 | dp->dl_type = type; | |
215 | dp->dl_recall.cbr_dp = NULL; | |
216 | dp->dl_recall.cbr_ident = cb->cb_ident; | |
217 | dp->dl_recall.cbr_trunc = 0; | |
218 | dp->dl_stateid.si_boot = boot_time; | |
219 | dp->dl_stateid.si_stateownerid = current_delegid++; | |
220 | dp->dl_stateid.si_fileid = 0; | |
221 | dp->dl_stateid.si_generation = 0; | |
222 | dp->dl_fhlen = current_fh->fh_handle.fh_size; | |
223 | memcpy(dp->dl_fhval, ¤t_fh->fh_handle.fh_base, | |
224 | current_fh->fh_handle.fh_size); | |
225 | dp->dl_time = 0; | |
226 | atomic_set(&dp->dl_count, 1); | |
227 | list_add(&dp->dl_perfile, &fp->fi_delegations); | |
228 | list_add(&dp->dl_perclnt, &clp->cl_delegations); | |
229 | return dp; | |
230 | } | |
231 | ||
232 | void | |
233 | nfs4_put_delegation(struct nfs4_delegation *dp) | |
234 | { | |
235 | if (atomic_dec_and_test(&dp->dl_count)) { | |
236 | dprintk("NFSD: freeing dp %p\n",dp); | |
237 | put_nfs4_file(dp->dl_file); | |
238 | kmem_cache_free(deleg_slab, dp); | |
239 | num_delegations--; | |
240 | } | |
241 | } | |
242 | ||
243 | /* Remove the associated file_lock first, then remove the delegation. | |
244 | * lease_modify() is called to remove the FS_LEASE file_lock from | |
245 | * the i_flock list, eventually calling nfsd's lock_manager | |
246 | * fl_release_callback. | |
247 | */ | |
248 | static void | |
249 | nfs4_close_delegation(struct nfs4_delegation *dp) | |
250 | { | |
251 | struct file *filp = dp->dl_vfs_file; | |
252 | ||
253 | dprintk("NFSD: close_delegation dp %p\n",dp); | |
254 | dp->dl_vfs_file = NULL; | |
255 | /* The following nfsd_close may not actually close the file, | |
256 | * but we want to remove the lease in any case. */ | |
257 | if (dp->dl_flock) | |
258 | vfs_setlease(filp, F_UNLCK, &dp->dl_flock); | |
259 | nfsd_close(filp); | |
260 | } | |
261 | ||
262 | /* Called under the state lock. */ | |
263 | static void | |
264 | unhash_delegation(struct nfs4_delegation *dp) | |
265 | { | |
266 | list_del_init(&dp->dl_perfile); | |
267 | list_del_init(&dp->dl_perclnt); | |
268 | spin_lock(&recall_lock); | |
269 | list_del_init(&dp->dl_recall_lru); | |
270 | spin_unlock(&recall_lock); | |
271 | nfs4_close_delegation(dp); | |
272 | nfs4_put_delegation(dp); | |
273 | } | |
274 | ||
275 | /* | |
276 | * SETCLIENTID state | |
277 | */ | |
278 | ||
279 | /* Hash tables for nfs4_clientid state */ | |
280 | #define CLIENT_HASH_BITS 4 | |
281 | #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS) | |
282 | #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1) | |
283 | ||
284 | #define clientid_hashval(id) \ | |
285 | ((id) & CLIENT_HASH_MASK) | |
286 | #define clientstr_hashval(name) \ | |
287 | (opaque_hashval((name), 8) & CLIENT_HASH_MASK) | |
288 | /* | |
289 | * reclaim_str_hashtbl[] holds known client info from previous reset/reboot | |
290 | * used in reboot/reset lease grace period processing | |
291 | * | |
292 | * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed | |
293 | * setclientid_confirmed info. | |
294 | * | |
295 | * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed | |
296 | * setclientid info. | |
297 | * | |
298 | * client_lru holds client queue ordered by nfs4_client.cl_time | |
299 | * for lease renewal. | |
300 | * | |
301 | * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time | |
302 | * for last close replay. | |
303 | */ | |
304 | static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE]; | |
305 | static int reclaim_str_hashtbl_size = 0; | |
306 | static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE]; | |
307 | static struct list_head conf_str_hashtbl[CLIENT_HASH_SIZE]; | |
308 | static struct list_head unconf_str_hashtbl[CLIENT_HASH_SIZE]; | |
309 | static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE]; | |
310 | static struct list_head client_lru; | |
311 | static struct list_head close_lru; | |
312 | ||
313 | static inline void | |
314 | renew_client(struct nfs4_client *clp) | |
315 | { | |
316 | /* | |
317 | * Move client to the end to the LRU list. | |
318 | */ | |
319 | dprintk("renewing client (clientid %08x/%08x)\n", | |
320 | clp->cl_clientid.cl_boot, | |
321 | clp->cl_clientid.cl_id); | |
322 | list_move_tail(&clp->cl_lru, &client_lru); | |
323 | clp->cl_time = get_seconds(); | |
324 | } | |
325 | ||
326 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ | |
327 | static int | |
328 | STALE_CLIENTID(clientid_t *clid) | |
329 | { | |
330 | if (clid->cl_boot == boot_time) | |
331 | return 0; | |
332 | dprintk("NFSD stale clientid (%08x/%08x)\n", | |
333 | clid->cl_boot, clid->cl_id); | |
334 | return 1; | |
335 | } | |
336 | ||
337 | /* | |
338 | * XXX Should we use a slab cache ? | |
339 | * This type of memory management is somewhat inefficient, but we use it | |
340 | * anyway since SETCLIENTID is not a common operation. | |
341 | */ | |
342 | static struct nfs4_client *alloc_client(struct xdr_netobj name) | |
343 | { | |
344 | struct nfs4_client *clp; | |
345 | ||
346 | clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); | |
347 | if (clp == NULL) | |
348 | return NULL; | |
349 | clp->cl_name.data = kmalloc(name.len, GFP_KERNEL); | |
350 | if (clp->cl_name.data == NULL) { | |
351 | kfree(clp); | |
352 | return NULL; | |
353 | } | |
354 | memcpy(clp->cl_name.data, name.data, name.len); | |
355 | clp->cl_name.len = name.len; | |
356 | return clp; | |
357 | } | |
358 | ||
359 | static void | |
360 | shutdown_callback_client(struct nfs4_client *clp) | |
361 | { | |
362 | struct rpc_clnt *clnt = clp->cl_callback.cb_client; | |
363 | ||
364 | if (clnt) { | |
365 | /* | |
366 | * Callback threads take a reference on the client, so there | |
367 | * should be no outstanding callbacks at this point. | |
368 | */ | |
369 | clp->cl_callback.cb_client = NULL; | |
370 | rpc_shutdown_client(clnt); | |
371 | } | |
372 | } | |
373 | ||
374 | static inline void | |
375 | free_client(struct nfs4_client *clp) | |
376 | { | |
377 | shutdown_callback_client(clp); | |
378 | if (clp->cl_cred.cr_group_info) | |
379 | put_group_info(clp->cl_cred.cr_group_info); | |
380 | kfree(clp->cl_name.data); | |
381 | kfree(clp); | |
382 | } | |
383 | ||
384 | void | |
385 | put_nfs4_client(struct nfs4_client *clp) | |
386 | { | |
387 | if (atomic_dec_and_test(&clp->cl_count)) | |
388 | free_client(clp); | |
389 | } | |
390 | ||
391 | static void | |
392 | expire_client(struct nfs4_client *clp) | |
393 | { | |
394 | struct nfs4_stateowner *sop; | |
395 | struct nfs4_delegation *dp; | |
396 | struct list_head reaplist; | |
397 | ||
398 | dprintk("NFSD: expire_client cl_count %d\n", | |
399 | atomic_read(&clp->cl_count)); | |
400 | ||
401 | INIT_LIST_HEAD(&reaplist); | |
402 | spin_lock(&recall_lock); | |
403 | while (!list_empty(&clp->cl_delegations)) { | |
404 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); | |
405 | dprintk("NFSD: expire client. dp %p, fp %p\n", dp, | |
406 | dp->dl_flock); | |
407 | list_del_init(&dp->dl_perclnt); | |
408 | list_move(&dp->dl_recall_lru, &reaplist); | |
409 | } | |
410 | spin_unlock(&recall_lock); | |
411 | while (!list_empty(&reaplist)) { | |
412 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
413 | list_del_init(&dp->dl_recall_lru); | |
414 | unhash_delegation(dp); | |
415 | } | |
416 | list_del(&clp->cl_idhash); | |
417 | list_del(&clp->cl_strhash); | |
418 | list_del(&clp->cl_lru); | |
419 | while (!list_empty(&clp->cl_openowners)) { | |
420 | sop = list_entry(clp->cl_openowners.next, struct nfs4_stateowner, so_perclient); | |
421 | release_stateowner(sop); | |
422 | } | |
423 | put_nfs4_client(clp); | |
424 | } | |
425 | ||
426 | static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir) | |
427 | { | |
428 | struct nfs4_client *clp; | |
429 | ||
430 | clp = alloc_client(name); | |
431 | if (clp == NULL) | |
432 | return NULL; | |
433 | memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); | |
434 | atomic_set(&clp->cl_count, 1); | |
435 | atomic_set(&clp->cl_callback.cb_set, 0); | |
436 | INIT_LIST_HEAD(&clp->cl_idhash); | |
437 | INIT_LIST_HEAD(&clp->cl_strhash); | |
438 | INIT_LIST_HEAD(&clp->cl_openowners); | |
439 | INIT_LIST_HEAD(&clp->cl_delegations); | |
440 | INIT_LIST_HEAD(&clp->cl_lru); | |
441 | return clp; | |
442 | } | |
443 | ||
444 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) | |
445 | { | |
446 | memcpy(target->cl_verifier.data, source->data, | |
447 | sizeof(target->cl_verifier.data)); | |
448 | } | |
449 | ||
450 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) | |
451 | { | |
452 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; | |
453 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; | |
454 | } | |
455 | ||
456 | static void copy_cred(struct svc_cred *target, struct svc_cred *source) | |
457 | { | |
458 | target->cr_uid = source->cr_uid; | |
459 | target->cr_gid = source->cr_gid; | |
460 | target->cr_group_info = source->cr_group_info; | |
461 | get_group_info(target->cr_group_info); | |
462 | } | |
463 | ||
464 | static int same_name(const char *n1, const char *n2) | |
465 | { | |
466 | return 0 == memcmp(n1, n2, HEXDIR_LEN); | |
467 | } | |
468 | ||
469 | static int | |
470 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) | |
471 | { | |
472 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); | |
473 | } | |
474 | ||
475 | static int | |
476 | same_clid(clientid_t *cl1, clientid_t *cl2) | |
477 | { | |
478 | return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); | |
479 | } | |
480 | ||
481 | /* XXX what about NGROUP */ | |
482 | static int | |
483 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) | |
484 | { | |
485 | return cr1->cr_uid == cr2->cr_uid; | |
486 | } | |
487 | ||
488 | static void gen_clid(struct nfs4_client *clp) | |
489 | { | |
490 | static u32 current_clientid = 1; | |
491 | ||
492 | clp->cl_clientid.cl_boot = boot_time; | |
493 | clp->cl_clientid.cl_id = current_clientid++; | |
494 | } | |
495 | ||
496 | static void gen_confirm(struct nfs4_client *clp) | |
497 | { | |
498 | static u32 i; | |
499 | u32 *p; | |
500 | ||
501 | p = (u32 *)clp->cl_confirm.data; | |
502 | *p++ = get_seconds(); | |
503 | *p++ = i++; | |
504 | } | |
505 | ||
506 | static int check_name(struct xdr_netobj name) | |
507 | { | |
508 | if (name.len == 0) | |
509 | return 0; | |
510 | if (name.len > NFS4_OPAQUE_LIMIT) { | |
511 | dprintk("NFSD: check_name: name too long(%d)!\n", name.len); | |
512 | return 0; | |
513 | } | |
514 | return 1; | |
515 | } | |
516 | ||
517 | static void | |
518 | add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) | |
519 | { | |
520 | unsigned int idhashval; | |
521 | ||
522 | list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); | |
523 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
524 | list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); | |
525 | list_add_tail(&clp->cl_lru, &client_lru); | |
526 | clp->cl_time = get_seconds(); | |
527 | } | |
528 | ||
529 | static void | |
530 | move_to_confirmed(struct nfs4_client *clp) | |
531 | { | |
532 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
533 | unsigned int strhashval; | |
534 | ||
535 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); | |
536 | list_del_init(&clp->cl_strhash); | |
537 | list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); | |
538 | strhashval = clientstr_hashval(clp->cl_recdir); | |
539 | list_add(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); | |
540 | renew_client(clp); | |
541 | } | |
542 | ||
543 | static struct nfs4_client * | |
544 | find_confirmed_client(clientid_t *clid) | |
545 | { | |
546 | struct nfs4_client *clp; | |
547 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
548 | ||
549 | list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { | |
550 | if (same_clid(&clp->cl_clientid, clid)) | |
551 | return clp; | |
552 | } | |
553 | return NULL; | |
554 | } | |
555 | ||
556 | static struct nfs4_client * | |
557 | find_unconfirmed_client(clientid_t *clid) | |
558 | { | |
559 | struct nfs4_client *clp; | |
560 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
561 | ||
562 | list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { | |
563 | if (same_clid(&clp->cl_clientid, clid)) | |
564 | return clp; | |
565 | } | |
566 | return NULL; | |
567 | } | |
568 | ||
569 | static struct nfs4_client * | |
570 | find_confirmed_client_by_str(const char *dname, unsigned int hashval) | |
571 | { | |
572 | struct nfs4_client *clp; | |
573 | ||
574 | list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) { | |
575 | if (same_name(clp->cl_recdir, dname)) | |
576 | return clp; | |
577 | } | |
578 | return NULL; | |
579 | } | |
580 | ||
581 | static struct nfs4_client * | |
582 | find_unconfirmed_client_by_str(const char *dname, unsigned int hashval) | |
583 | { | |
584 | struct nfs4_client *clp; | |
585 | ||
586 | list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) { | |
587 | if (same_name(clp->cl_recdir, dname)) | |
588 | return clp; | |
589 | } | |
590 | return NULL; | |
591 | } | |
592 | ||
593 | /* a helper function for parse_callback */ | |
594 | static int | |
595 | parse_octet(unsigned int *lenp, char **addrp) | |
596 | { | |
597 | unsigned int len = *lenp; | |
598 | char *p = *addrp; | |
599 | int n = -1; | |
600 | char c; | |
601 | ||
602 | for (;;) { | |
603 | if (!len) | |
604 | break; | |
605 | len--; | |
606 | c = *p++; | |
607 | if (c == '.') | |
608 | break; | |
609 | if ((c < '0') || (c > '9')) { | |
610 | n = -1; | |
611 | break; | |
612 | } | |
613 | if (n < 0) | |
614 | n = 0; | |
615 | n = (n * 10) + (c - '0'); | |
616 | if (n > 255) { | |
617 | n = -1; | |
618 | break; | |
619 | } | |
620 | } | |
621 | *lenp = len; | |
622 | *addrp = p; | |
623 | return n; | |
624 | } | |
625 | ||
626 | /* parse and set the setclientid ipv4 callback address */ | |
627 | static int | |
628 | parse_ipv4(unsigned int addr_len, char *addr_val, unsigned int *cbaddrp, unsigned short *cbportp) | |
629 | { | |
630 | int temp = 0; | |
631 | u32 cbaddr = 0; | |
632 | u16 cbport = 0; | |
633 | u32 addrlen = addr_len; | |
634 | char *addr = addr_val; | |
635 | int i, shift; | |
636 | ||
637 | /* ipaddress */ | |
638 | shift = 24; | |
639 | for(i = 4; i > 0 ; i--) { | |
640 | if ((temp = parse_octet(&addrlen, &addr)) < 0) { | |
641 | return 0; | |
642 | } | |
643 | cbaddr |= (temp << shift); | |
644 | if (shift > 0) | |
645 | shift -= 8; | |
646 | } | |
647 | *cbaddrp = cbaddr; | |
648 | ||
649 | /* port */ | |
650 | shift = 8; | |
651 | for(i = 2; i > 0 ; i--) { | |
652 | if ((temp = parse_octet(&addrlen, &addr)) < 0) { | |
653 | return 0; | |
654 | } | |
655 | cbport |= (temp << shift); | |
656 | if (shift > 0) | |
657 | shift -= 8; | |
658 | } | |
659 | *cbportp = cbport; | |
660 | return 1; | |
661 | } | |
662 | ||
663 | static void | |
664 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se) | |
665 | { | |
666 | struct nfs4_callback *cb = &clp->cl_callback; | |
667 | ||
668 | /* Currently, we only support tcp for the callback channel */ | |
669 | if ((se->se_callback_netid_len != 3) || memcmp((char *)se->se_callback_netid_val, "tcp", 3)) | |
670 | goto out_err; | |
671 | ||
672 | if ( !(parse_ipv4(se->se_callback_addr_len, se->se_callback_addr_val, | |
673 | &cb->cb_addr, &cb->cb_port))) | |
674 | goto out_err; | |
675 | cb->cb_prog = se->se_callback_prog; | |
676 | cb->cb_ident = se->se_callback_ident; | |
677 | return; | |
678 | out_err: | |
679 | dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " | |
680 | "will not receive delegations\n", | |
681 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
682 | ||
683 | return; | |
684 | } | |
685 | ||
686 | __be32 | |
687 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
688 | struct nfsd4_setclientid *setclid) | |
689 | { | |
690 | struct sockaddr_in *sin = svc_addr_in(rqstp); | |
691 | struct xdr_netobj clname = { | |
692 | .len = setclid->se_namelen, | |
693 | .data = setclid->se_name, | |
694 | }; | |
695 | nfs4_verifier clverifier = setclid->se_verf; | |
696 | unsigned int strhashval; | |
697 | struct nfs4_client *conf, *unconf, *new; | |
698 | __be32 status; | |
699 | char dname[HEXDIR_LEN]; | |
700 | ||
701 | if (!check_name(clname)) | |
702 | return nfserr_inval; | |
703 | ||
704 | status = nfs4_make_rec_clidname(dname, &clname); | |
705 | if (status) | |
706 | return status; | |
707 | ||
708 | /* | |
709 | * XXX The Duplicate Request Cache (DRC) has been checked (??) | |
710 | * We get here on a DRC miss. | |
711 | */ | |
712 | ||
713 | strhashval = clientstr_hashval(dname); | |
714 | ||
715 | nfs4_lock_state(); | |
716 | conf = find_confirmed_client_by_str(dname, strhashval); | |
717 | if (conf) { | |
718 | /* RFC 3530 14.2.33 CASE 0: */ | |
719 | status = nfserr_clid_inuse; | |
720 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred) | |
721 | || conf->cl_addr != sin->sin_addr.s_addr) { | |
722 | dprintk("NFSD: setclientid: string in use by client" | |
723 | "at %u.%u.%u.%u\n", NIPQUAD(conf->cl_addr)); | |
724 | goto out; | |
725 | } | |
726 | } | |
727 | /* | |
728 | * section 14.2.33 of RFC 3530 (under the heading "IMPLEMENTATION") | |
729 | * has a description of SETCLIENTID request processing consisting | |
730 | * of 5 bullet points, labeled as CASE0 - CASE4 below. | |
731 | */ | |
732 | unconf = find_unconfirmed_client_by_str(dname, strhashval); | |
733 | status = nfserr_resource; | |
734 | if (!conf) { | |
735 | /* | |
736 | * RFC 3530 14.2.33 CASE 4: | |
737 | * placed first, because it is the normal case | |
738 | */ | |
739 | if (unconf) | |
740 | expire_client(unconf); | |
741 | new = create_client(clname, dname); | |
742 | if (new == NULL) | |
743 | goto out; | |
744 | gen_clid(new); | |
745 | } else if (same_verf(&conf->cl_verifier, &clverifier)) { | |
746 | /* | |
747 | * RFC 3530 14.2.33 CASE 1: | |
748 | * probable callback update | |
749 | */ | |
750 | if (unconf) { | |
751 | /* Note this is removing unconfirmed {*x***}, | |
752 | * which is stronger than RFC recommended {vxc**}. | |
753 | * This has the advantage that there is at most | |
754 | * one {*x***} in either list at any time. | |
755 | */ | |
756 | expire_client(unconf); | |
757 | } | |
758 | new = create_client(clname, dname); | |
759 | if (new == NULL) | |
760 | goto out; | |
761 | copy_clid(new, conf); | |
762 | } else if (!unconf) { | |
763 | /* | |
764 | * RFC 3530 14.2.33 CASE 2: | |
765 | * probable client reboot; state will be removed if | |
766 | * confirmed. | |
767 | */ | |
768 | new = create_client(clname, dname); | |
769 | if (new == NULL) | |
770 | goto out; | |
771 | gen_clid(new); | |
772 | } else { | |
773 | /* | |
774 | * RFC 3530 14.2.33 CASE 3: | |
775 | * probable client reboot; state will be removed if | |
776 | * confirmed. | |
777 | */ | |
778 | expire_client(unconf); | |
779 | new = create_client(clname, dname); | |
780 | if (new == NULL) | |
781 | goto out; | |
782 | gen_clid(new); | |
783 | } | |
784 | copy_verf(new, &clverifier); | |
785 | new->cl_addr = sin->sin_addr.s_addr; | |
786 | copy_cred(&new->cl_cred, &rqstp->rq_cred); | |
787 | gen_confirm(new); | |
788 | gen_callback(new, setclid); | |
789 | add_to_unconfirmed(new, strhashval); | |
790 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; | |
791 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; | |
792 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); | |
793 | status = nfs_ok; | |
794 | out: | |
795 | nfs4_unlock_state(); | |
796 | return status; | |
797 | } | |
798 | ||
799 | ||
800 | /* | |
801 | * Section 14.2.34 of RFC 3530 (under the heading "IMPLEMENTATION") has | |
802 | * a description of SETCLIENTID_CONFIRM request processing consisting of 4 | |
803 | * bullets, labeled as CASE1 - CASE4 below. | |
804 | */ | |
805 | __be32 | |
806 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, | |
807 | struct nfsd4_compound_state *cstate, | |
808 | struct nfsd4_setclientid_confirm *setclientid_confirm) | |
809 | { | |
810 | struct sockaddr_in *sin = svc_addr_in(rqstp); | |
811 | struct nfs4_client *conf, *unconf; | |
812 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; | |
813 | clientid_t * clid = &setclientid_confirm->sc_clientid; | |
814 | __be32 status; | |
815 | ||
816 | if (STALE_CLIENTID(clid)) | |
817 | return nfserr_stale_clientid; | |
818 | /* | |
819 | * XXX The Duplicate Request Cache (DRC) has been checked (??) | |
820 | * We get here on a DRC miss. | |
821 | */ | |
822 | ||
823 | nfs4_lock_state(); | |
824 | ||
825 | conf = find_confirmed_client(clid); | |
826 | unconf = find_unconfirmed_client(clid); | |
827 | ||
828 | status = nfserr_clid_inuse; | |
829 | if (conf && conf->cl_addr != sin->sin_addr.s_addr) | |
830 | goto out; | |
831 | if (unconf && unconf->cl_addr != sin->sin_addr.s_addr) | |
832 | goto out; | |
833 | ||
834 | /* | |
835 | * section 14.2.34 of RFC 3530 has a description of | |
836 | * SETCLIENTID_CONFIRM request processing consisting | |
837 | * of 4 bullet points, labeled as CASE1 - CASE4 below. | |
838 | */ | |
839 | if (conf && unconf && same_verf(&confirm, &unconf->cl_confirm)) { | |
840 | /* | |
841 | * RFC 3530 14.2.34 CASE 1: | |
842 | * callback update | |
843 | */ | |
844 | if (!same_creds(&conf->cl_cred, &unconf->cl_cred)) | |
845 | status = nfserr_clid_inuse; | |
846 | else { | |
847 | /* XXX: We just turn off callbacks until we can handle | |
848 | * change request correctly. */ | |
849 | atomic_set(&conf->cl_callback.cb_set, 0); | |
850 | gen_confirm(conf); | |
851 | nfsd4_remove_clid_dir(unconf); | |
852 | expire_client(unconf); | |
853 | status = nfs_ok; | |
854 | ||
855 | } | |
856 | } else if (conf && !unconf) { | |
857 | /* | |
858 | * RFC 3530 14.2.34 CASE 2: | |
859 | * probable retransmitted request; play it safe and | |
860 | * do nothing. | |
861 | */ | |
862 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) | |
863 | status = nfserr_clid_inuse; | |
864 | else | |
865 | status = nfs_ok; | |
866 | } else if (!conf && unconf | |
867 | && same_verf(&unconf->cl_confirm, &confirm)) { | |
868 | /* | |
869 | * RFC 3530 14.2.34 CASE 3: | |
870 | * Normal case; new or rebooted client: | |
871 | */ | |
872 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred)) { | |
873 | status = nfserr_clid_inuse; | |
874 | } else { | |
875 | unsigned int hash = | |
876 | clientstr_hashval(unconf->cl_recdir); | |
877 | conf = find_confirmed_client_by_str(unconf->cl_recdir, | |
878 | hash); | |
879 | if (conf) { | |
880 | nfsd4_remove_clid_dir(conf); | |
881 | expire_client(conf); | |
882 | } | |
883 | move_to_confirmed(unconf); | |
884 | conf = unconf; | |
885 | nfsd4_probe_callback(conf); | |
886 | status = nfs_ok; | |
887 | } | |
888 | } else if ((!conf || (conf && !same_verf(&conf->cl_confirm, &confirm))) | |
889 | && (!unconf || (unconf && !same_verf(&unconf->cl_confirm, | |
890 | &confirm)))) { | |
891 | /* | |
892 | * RFC 3530 14.2.34 CASE 4: | |
893 | * Client probably hasn't noticed that we rebooted yet. | |
894 | */ | |
895 | status = nfserr_stale_clientid; | |
896 | } else { | |
897 | /* check that we have hit one of the cases...*/ | |
898 | status = nfserr_clid_inuse; | |
899 | } | |
900 | out: | |
901 | nfs4_unlock_state(); | |
902 | return status; | |
903 | } | |
904 | ||
905 | /* OPEN Share state helper functions */ | |
906 | static inline struct nfs4_file * | |
907 | alloc_init_file(struct inode *ino) | |
908 | { | |
909 | struct nfs4_file *fp; | |
910 | unsigned int hashval = file_hashval(ino); | |
911 | ||
912 | fp = kmem_cache_alloc(file_slab, GFP_KERNEL); | |
913 | if (fp) { | |
914 | kref_init(&fp->fi_ref); | |
915 | INIT_LIST_HEAD(&fp->fi_hash); | |
916 | INIT_LIST_HEAD(&fp->fi_stateids); | |
917 | INIT_LIST_HEAD(&fp->fi_delegations); | |
918 | list_add(&fp->fi_hash, &file_hashtbl[hashval]); | |
919 | fp->fi_inode = igrab(ino); | |
920 | fp->fi_id = current_fileid++; | |
921 | fp->fi_had_conflict = false; | |
922 | return fp; | |
923 | } | |
924 | return NULL; | |
925 | } | |
926 | ||
927 | static void | |
928 | nfsd4_free_slab(struct kmem_cache **slab) | |
929 | { | |
930 | if (*slab == NULL) | |
931 | return; | |
932 | kmem_cache_destroy(*slab); | |
933 | *slab = NULL; | |
934 | } | |
935 | ||
936 | void | |
937 | nfsd4_free_slabs(void) | |
938 | { | |
939 | nfsd4_free_slab(&stateowner_slab); | |
940 | nfsd4_free_slab(&file_slab); | |
941 | nfsd4_free_slab(&stateid_slab); | |
942 | nfsd4_free_slab(&deleg_slab); | |
943 | } | |
944 | ||
945 | static int | |
946 | nfsd4_init_slabs(void) | |
947 | { | |
948 | stateowner_slab = kmem_cache_create("nfsd4_stateowners", | |
949 | sizeof(struct nfs4_stateowner), 0, 0, NULL); | |
950 | if (stateowner_slab == NULL) | |
951 | goto out_nomem; | |
952 | file_slab = kmem_cache_create("nfsd4_files", | |
953 | sizeof(struct nfs4_file), 0, 0, NULL); | |
954 | if (file_slab == NULL) | |
955 | goto out_nomem; | |
956 | stateid_slab = kmem_cache_create("nfsd4_stateids", | |
957 | sizeof(struct nfs4_stateid), 0, 0, NULL); | |
958 | if (stateid_slab == NULL) | |
959 | goto out_nomem; | |
960 | deleg_slab = kmem_cache_create("nfsd4_delegations", | |
961 | sizeof(struct nfs4_delegation), 0, 0, NULL); | |
962 | if (deleg_slab == NULL) | |
963 | goto out_nomem; | |
964 | return 0; | |
965 | out_nomem: | |
966 | nfsd4_free_slabs(); | |
967 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); | |
968 | return -ENOMEM; | |
969 | } | |
970 | ||
971 | void | |
972 | nfs4_free_stateowner(struct kref *kref) | |
973 | { | |
974 | struct nfs4_stateowner *sop = | |
975 | container_of(kref, struct nfs4_stateowner, so_ref); | |
976 | kfree(sop->so_owner.data); | |
977 | kmem_cache_free(stateowner_slab, sop); | |
978 | } | |
979 | ||
980 | static inline struct nfs4_stateowner * | |
981 | alloc_stateowner(struct xdr_netobj *owner) | |
982 | { | |
983 | struct nfs4_stateowner *sop; | |
984 | ||
985 | if ((sop = kmem_cache_alloc(stateowner_slab, GFP_KERNEL))) { | |
986 | if ((sop->so_owner.data = kmalloc(owner->len, GFP_KERNEL))) { | |
987 | memcpy(sop->so_owner.data, owner->data, owner->len); | |
988 | sop->so_owner.len = owner->len; | |
989 | kref_init(&sop->so_ref); | |
990 | return sop; | |
991 | } | |
992 | kmem_cache_free(stateowner_slab, sop); | |
993 | } | |
994 | return NULL; | |
995 | } | |
996 | ||
997 | static struct nfs4_stateowner * | |
998 | alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { | |
999 | struct nfs4_stateowner *sop; | |
1000 | struct nfs4_replay *rp; | |
1001 | unsigned int idhashval; | |
1002 | ||
1003 | if (!(sop = alloc_stateowner(&open->op_owner))) | |
1004 | return NULL; | |
1005 | idhashval = ownerid_hashval(current_ownerid); | |
1006 | INIT_LIST_HEAD(&sop->so_idhash); | |
1007 | INIT_LIST_HEAD(&sop->so_strhash); | |
1008 | INIT_LIST_HEAD(&sop->so_perclient); | |
1009 | INIT_LIST_HEAD(&sop->so_stateids); | |
1010 | INIT_LIST_HEAD(&sop->so_perstateid); /* not used */ | |
1011 | INIT_LIST_HEAD(&sop->so_close_lru); | |
1012 | sop->so_time = 0; | |
1013 | list_add(&sop->so_idhash, &ownerid_hashtbl[idhashval]); | |
1014 | list_add(&sop->so_strhash, &ownerstr_hashtbl[strhashval]); | |
1015 | list_add(&sop->so_perclient, &clp->cl_openowners); | |
1016 | sop->so_is_open_owner = 1; | |
1017 | sop->so_id = current_ownerid++; | |
1018 | sop->so_client = clp; | |
1019 | sop->so_seqid = open->op_seqid; | |
1020 | sop->so_confirmed = 0; | |
1021 | rp = &sop->so_replay; | |
1022 | rp->rp_status = nfserr_serverfault; | |
1023 | rp->rp_buflen = 0; | |
1024 | rp->rp_buf = rp->rp_ibuf; | |
1025 | return sop; | |
1026 | } | |
1027 | ||
1028 | static void | |
1029 | release_stateid_lockowners(struct nfs4_stateid *open_stp) | |
1030 | { | |
1031 | struct nfs4_stateowner *lock_sop; | |
1032 | ||
1033 | while (!list_empty(&open_stp->st_lockowners)) { | |
1034 | lock_sop = list_entry(open_stp->st_lockowners.next, | |
1035 | struct nfs4_stateowner, so_perstateid); | |
1036 | /* list_del(&open_stp->st_lockowners); */ | |
1037 | BUG_ON(lock_sop->so_is_open_owner); | |
1038 | release_stateowner(lock_sop); | |
1039 | } | |
1040 | } | |
1041 | ||
1042 | static void | |
1043 | unhash_stateowner(struct nfs4_stateowner *sop) | |
1044 | { | |
1045 | struct nfs4_stateid *stp; | |
1046 | ||
1047 | list_del(&sop->so_idhash); | |
1048 | list_del(&sop->so_strhash); | |
1049 | if (sop->so_is_open_owner) | |
1050 | list_del(&sop->so_perclient); | |
1051 | list_del(&sop->so_perstateid); | |
1052 | while (!list_empty(&sop->so_stateids)) { | |
1053 | stp = list_entry(sop->so_stateids.next, | |
1054 | struct nfs4_stateid, st_perstateowner); | |
1055 | if (sop->so_is_open_owner) | |
1056 | release_stateid(stp, OPEN_STATE); | |
1057 | else | |
1058 | release_stateid(stp, LOCK_STATE); | |
1059 | } | |
1060 | } | |
1061 | ||
1062 | static void | |
1063 | release_stateowner(struct nfs4_stateowner *sop) | |
1064 | { | |
1065 | unhash_stateowner(sop); | |
1066 | list_del(&sop->so_close_lru); | |
1067 | nfs4_put_stateowner(sop); | |
1068 | } | |
1069 | ||
1070 | static inline void | |
1071 | init_stateid(struct nfs4_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { | |
1072 | struct nfs4_stateowner *sop = open->op_stateowner; | |
1073 | unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); | |
1074 | ||
1075 | INIT_LIST_HEAD(&stp->st_hash); | |
1076 | INIT_LIST_HEAD(&stp->st_perstateowner); | |
1077 | INIT_LIST_HEAD(&stp->st_lockowners); | |
1078 | INIT_LIST_HEAD(&stp->st_perfile); | |
1079 | list_add(&stp->st_hash, &stateid_hashtbl[hashval]); | |
1080 | list_add(&stp->st_perstateowner, &sop->so_stateids); | |
1081 | list_add(&stp->st_perfile, &fp->fi_stateids); | |
1082 | stp->st_stateowner = sop; | |
1083 | get_nfs4_file(fp); | |
1084 | stp->st_file = fp; | |
1085 | stp->st_stateid.si_boot = boot_time; | |
1086 | stp->st_stateid.si_stateownerid = sop->so_id; | |
1087 | stp->st_stateid.si_fileid = fp->fi_id; | |
1088 | stp->st_stateid.si_generation = 0; | |
1089 | stp->st_access_bmap = 0; | |
1090 | stp->st_deny_bmap = 0; | |
1091 | __set_bit(open->op_share_access, &stp->st_access_bmap); | |
1092 | __set_bit(open->op_share_deny, &stp->st_deny_bmap); | |
1093 | stp->st_openstp = NULL; | |
1094 | } | |
1095 | ||
1096 | static void | |
1097 | release_stateid(struct nfs4_stateid *stp, int flags) | |
1098 | { | |
1099 | struct file *filp = stp->st_vfs_file; | |
1100 | ||
1101 | list_del(&stp->st_hash); | |
1102 | list_del(&stp->st_perfile); | |
1103 | list_del(&stp->st_perstateowner); | |
1104 | if (flags & OPEN_STATE) { | |
1105 | release_stateid_lockowners(stp); | |
1106 | stp->st_vfs_file = NULL; | |
1107 | nfsd_close(filp); | |
1108 | } else if (flags & LOCK_STATE) | |
1109 | locks_remove_posix(filp, (fl_owner_t) stp->st_stateowner); | |
1110 | put_nfs4_file(stp->st_file); | |
1111 | kmem_cache_free(stateid_slab, stp); | |
1112 | } | |
1113 | ||
1114 | static void | |
1115 | move_to_close_lru(struct nfs4_stateowner *sop) | |
1116 | { | |
1117 | dprintk("NFSD: move_to_close_lru nfs4_stateowner %p\n", sop); | |
1118 | ||
1119 | list_move_tail(&sop->so_close_lru, &close_lru); | |
1120 | sop->so_time = get_seconds(); | |
1121 | } | |
1122 | ||
1123 | static int | |
1124 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, | |
1125 | clientid_t *clid) | |
1126 | { | |
1127 | return (sop->so_owner.len == owner->len) && | |
1128 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && | |
1129 | (sop->so_client->cl_clientid.cl_id == clid->cl_id); | |
1130 | } | |
1131 | ||
1132 | static struct nfs4_stateowner * | |
1133 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open) | |
1134 | { | |
1135 | struct nfs4_stateowner *so = NULL; | |
1136 | ||
1137 | list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) { | |
1138 | if (same_owner_str(so, &open->op_owner, &open->op_clientid)) | |
1139 | return so; | |
1140 | } | |
1141 | return NULL; | |
1142 | } | |
1143 | ||
1144 | /* search file_hashtbl[] for file */ | |
1145 | static struct nfs4_file * | |
1146 | find_file(struct inode *ino) | |
1147 | { | |
1148 | unsigned int hashval = file_hashval(ino); | |
1149 | struct nfs4_file *fp; | |
1150 | ||
1151 | list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { | |
1152 | if (fp->fi_inode == ino) { | |
1153 | get_nfs4_file(fp); | |
1154 | return fp; | |
1155 | } | |
1156 | } | |
1157 | return NULL; | |
1158 | } | |
1159 | ||
1160 | static int access_valid(u32 x) | |
1161 | { | |
1162 | return (x > 0 && x < 4); | |
1163 | } | |
1164 | ||
1165 | static int deny_valid(u32 x) | |
1166 | { | |
1167 | return (x >= 0 && x < 5); | |
1168 | } | |
1169 | ||
1170 | static void | |
1171 | set_access(unsigned int *access, unsigned long bmap) { | |
1172 | int i; | |
1173 | ||
1174 | *access = 0; | |
1175 | for (i = 1; i < 4; i++) { | |
1176 | if (test_bit(i, &bmap)) | |
1177 | *access |= i; | |
1178 | } | |
1179 | } | |
1180 | ||
1181 | static void | |
1182 | set_deny(unsigned int *deny, unsigned long bmap) { | |
1183 | int i; | |
1184 | ||
1185 | *deny = 0; | |
1186 | for (i = 0; i < 4; i++) { | |
1187 | if (test_bit(i, &bmap)) | |
1188 | *deny |= i ; | |
1189 | } | |
1190 | } | |
1191 | ||
1192 | static int | |
1193 | test_share(struct nfs4_stateid *stp, struct nfsd4_open *open) { | |
1194 | unsigned int access, deny; | |
1195 | ||
1196 | set_access(&access, stp->st_access_bmap); | |
1197 | set_deny(&deny, stp->st_deny_bmap); | |
1198 | if ((access & open->op_share_deny) || (deny & open->op_share_access)) | |
1199 | return 0; | |
1200 | return 1; | |
1201 | } | |
1202 | ||
1203 | /* | |
1204 | * Called to check deny when READ with all zero stateid or | |
1205 | * WRITE with all zero or all one stateid | |
1206 | */ | |
1207 | static __be32 | |
1208 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) | |
1209 | { | |
1210 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
1211 | struct nfs4_file *fp; | |
1212 | struct nfs4_stateid *stp; | |
1213 | __be32 ret; | |
1214 | ||
1215 | dprintk("NFSD: nfs4_share_conflict\n"); | |
1216 | ||
1217 | fp = find_file(ino); | |
1218 | if (!fp) | |
1219 | return nfs_ok; | |
1220 | ret = nfserr_locked; | |
1221 | /* Search for conflicting share reservations */ | |
1222 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { | |
1223 | if (test_bit(deny_type, &stp->st_deny_bmap) || | |
1224 | test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap)) | |
1225 | goto out; | |
1226 | } | |
1227 | ret = nfs_ok; | |
1228 | out: | |
1229 | put_nfs4_file(fp); | |
1230 | return ret; | |
1231 | } | |
1232 | ||
1233 | static inline void | |
1234 | nfs4_file_downgrade(struct file *filp, unsigned int share_access) | |
1235 | { | |
1236 | if (share_access & NFS4_SHARE_ACCESS_WRITE) { | |
1237 | put_write_access(filp->f_path.dentry->d_inode); | |
1238 | filp->f_mode = (filp->f_mode | FMODE_READ) & ~FMODE_WRITE; | |
1239 | } | |
1240 | } | |
1241 | ||
1242 | /* | |
1243 | * Recall a delegation | |
1244 | */ | |
1245 | static int | |
1246 | do_recall(void *__dp) | |
1247 | { | |
1248 | struct nfs4_delegation *dp = __dp; | |
1249 | ||
1250 | dp->dl_file->fi_had_conflict = true; | |
1251 | nfsd4_cb_recall(dp); | |
1252 | return 0; | |
1253 | } | |
1254 | ||
1255 | /* | |
1256 | * Spawn a thread to perform a recall on the delegation represented | |
1257 | * by the lease (file_lock) | |
1258 | * | |
1259 | * Called from break_lease() with lock_kernel() held. | |
1260 | * Note: we assume break_lease will only call this *once* for any given | |
1261 | * lease. | |
1262 | */ | |
1263 | static | |
1264 | void nfsd_break_deleg_cb(struct file_lock *fl) | |
1265 | { | |
1266 | struct nfs4_delegation *dp= (struct nfs4_delegation *)fl->fl_owner; | |
1267 | struct task_struct *t; | |
1268 | ||
1269 | dprintk("NFSD nfsd_break_deleg_cb: dp %p fl %p\n",dp,fl); | |
1270 | if (!dp) | |
1271 | return; | |
1272 | ||
1273 | /* We're assuming the state code never drops its reference | |
1274 | * without first removing the lease. Since we're in this lease | |
1275 | * callback (and since the lease code is serialized by the kernel | |
1276 | * lock) we know the server hasn't removed the lease yet, we know | |
1277 | * it's safe to take a reference: */ | |
1278 | atomic_inc(&dp->dl_count); | |
1279 | atomic_inc(&dp->dl_client->cl_count); | |
1280 | ||
1281 | spin_lock(&recall_lock); | |
1282 | list_add_tail(&dp->dl_recall_lru, &del_recall_lru); | |
1283 | spin_unlock(&recall_lock); | |
1284 | ||
1285 | /* only place dl_time is set. protected by lock_kernel*/ | |
1286 | dp->dl_time = get_seconds(); | |
1287 | ||
1288 | /* | |
1289 | * We don't want the locks code to timeout the lease for us; | |
1290 | * we'll remove it ourself if the delegation isn't returned | |
1291 | * in time. | |
1292 | */ | |
1293 | fl->fl_break_time = 0; | |
1294 | ||
1295 | t = kthread_run(do_recall, dp, "%s", "nfs4_cb_recall"); | |
1296 | if (IS_ERR(t)) { | |
1297 | struct nfs4_client *clp = dp->dl_client; | |
1298 | ||
1299 | printk(KERN_INFO "NFSD: Callback thread failed for " | |
1300 | "for client (clientid %08x/%08x)\n", | |
1301 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
1302 | put_nfs4_client(dp->dl_client); | |
1303 | nfs4_put_delegation(dp); | |
1304 | } | |
1305 | } | |
1306 | ||
1307 | /* | |
1308 | * The file_lock is being reapd. | |
1309 | * | |
1310 | * Called by locks_free_lock() with lock_kernel() held. | |
1311 | */ | |
1312 | static | |
1313 | void nfsd_release_deleg_cb(struct file_lock *fl) | |
1314 | { | |
1315 | struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner; | |
1316 | ||
1317 | dprintk("NFSD nfsd_release_deleg_cb: fl %p dp %p dl_count %d\n", fl,dp, atomic_read(&dp->dl_count)); | |
1318 | ||
1319 | if (!(fl->fl_flags & FL_LEASE) || !dp) | |
1320 | return; | |
1321 | dp->dl_flock = NULL; | |
1322 | } | |
1323 | ||
1324 | /* | |
1325 | * Set the delegation file_lock back pointer. | |
1326 | * | |
1327 | * Called from setlease() with lock_kernel() held. | |
1328 | */ | |
1329 | static | |
1330 | void nfsd_copy_lock_deleg_cb(struct file_lock *new, struct file_lock *fl) | |
1331 | { | |
1332 | struct nfs4_delegation *dp = (struct nfs4_delegation *)new->fl_owner; | |
1333 | ||
1334 | dprintk("NFSD: nfsd_copy_lock_deleg_cb: new fl %p dp %p\n", new, dp); | |
1335 | if (!dp) | |
1336 | return; | |
1337 | dp->dl_flock = new; | |
1338 | } | |
1339 | ||
1340 | /* | |
1341 | * Called from setlease() with lock_kernel() held | |
1342 | */ | |
1343 | static | |
1344 | int nfsd_same_client_deleg_cb(struct file_lock *onlist, struct file_lock *try) | |
1345 | { | |
1346 | struct nfs4_delegation *onlistd = | |
1347 | (struct nfs4_delegation *)onlist->fl_owner; | |
1348 | struct nfs4_delegation *tryd = | |
1349 | (struct nfs4_delegation *)try->fl_owner; | |
1350 | ||
1351 | if (onlist->fl_lmops != try->fl_lmops) | |
1352 | return 0; | |
1353 | ||
1354 | return onlistd->dl_client == tryd->dl_client; | |
1355 | } | |
1356 | ||
1357 | ||
1358 | static | |
1359 | int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) | |
1360 | { | |
1361 | if (arg & F_UNLCK) | |
1362 | return lease_modify(onlist, arg); | |
1363 | else | |
1364 | return -EAGAIN; | |
1365 | } | |
1366 | ||
1367 | static struct lock_manager_operations nfsd_lease_mng_ops = { | |
1368 | .fl_break = nfsd_break_deleg_cb, | |
1369 | .fl_release_private = nfsd_release_deleg_cb, | |
1370 | .fl_copy_lock = nfsd_copy_lock_deleg_cb, | |
1371 | .fl_mylease = nfsd_same_client_deleg_cb, | |
1372 | .fl_change = nfsd_change_deleg_cb, | |
1373 | }; | |
1374 | ||
1375 | ||
1376 | __be32 | |
1377 | nfsd4_process_open1(struct nfsd4_open *open) | |
1378 | { | |
1379 | clientid_t *clientid = &open->op_clientid; | |
1380 | struct nfs4_client *clp = NULL; | |
1381 | unsigned int strhashval; | |
1382 | struct nfs4_stateowner *sop = NULL; | |
1383 | ||
1384 | if (!check_name(open->op_owner)) | |
1385 | return nfserr_inval; | |
1386 | ||
1387 | if (STALE_CLIENTID(&open->op_clientid)) | |
1388 | return nfserr_stale_clientid; | |
1389 | ||
1390 | strhashval = ownerstr_hashval(clientid->cl_id, open->op_owner); | |
1391 | sop = find_openstateowner_str(strhashval, open); | |
1392 | open->op_stateowner = sop; | |
1393 | if (!sop) { | |
1394 | /* Make sure the client's lease hasn't expired. */ | |
1395 | clp = find_confirmed_client(clientid); | |
1396 | if (clp == NULL) | |
1397 | return nfserr_expired; | |
1398 | goto renew; | |
1399 | } | |
1400 | if (!sop->so_confirmed) { | |
1401 | /* Replace unconfirmed owners without checking for replay. */ | |
1402 | clp = sop->so_client; | |
1403 | release_stateowner(sop); | |
1404 | open->op_stateowner = NULL; | |
1405 | goto renew; | |
1406 | } | |
1407 | if (open->op_seqid == sop->so_seqid - 1) { | |
1408 | if (sop->so_replay.rp_buflen) | |
1409 | return nfserr_replay_me; | |
1410 | /* The original OPEN failed so spectacularly | |
1411 | * that we don't even have replay data saved! | |
1412 | * Therefore, we have no choice but to continue | |
1413 | * processing this OPEN; presumably, we'll | |
1414 | * fail again for the same reason. | |
1415 | */ | |
1416 | dprintk("nfsd4_process_open1: replay with no replay cache\n"); | |
1417 | goto renew; | |
1418 | } | |
1419 | if (open->op_seqid != sop->so_seqid) | |
1420 | return nfserr_bad_seqid; | |
1421 | renew: | |
1422 | if (open->op_stateowner == NULL) { | |
1423 | sop = alloc_init_open_stateowner(strhashval, clp, open); | |
1424 | if (sop == NULL) | |
1425 | return nfserr_resource; | |
1426 | open->op_stateowner = sop; | |
1427 | } | |
1428 | list_del_init(&sop->so_close_lru); | |
1429 | renew_client(sop->so_client); | |
1430 | return nfs_ok; | |
1431 | } | |
1432 | ||
1433 | static inline __be32 | |
1434 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) | |
1435 | { | |
1436 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | |
1437 | return nfserr_openmode; | |
1438 | else | |
1439 | return nfs_ok; | |
1440 | } | |
1441 | ||
1442 | static struct nfs4_delegation * | |
1443 | find_delegation_file(struct nfs4_file *fp, stateid_t *stid) | |
1444 | { | |
1445 | struct nfs4_delegation *dp; | |
1446 | ||
1447 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) { | |
1448 | if (dp->dl_stateid.si_stateownerid == stid->si_stateownerid) | |
1449 | return dp; | |
1450 | } | |
1451 | return NULL; | |
1452 | } | |
1453 | ||
1454 | static __be32 | |
1455 | nfs4_check_deleg(struct nfs4_file *fp, struct nfsd4_open *open, | |
1456 | struct nfs4_delegation **dp) | |
1457 | { | |
1458 | int flags; | |
1459 | __be32 status = nfserr_bad_stateid; | |
1460 | ||
1461 | *dp = find_delegation_file(fp, &open->op_delegate_stateid); | |
1462 | if (*dp == NULL) | |
1463 | goto out; | |
1464 | flags = open->op_share_access == NFS4_SHARE_ACCESS_READ ? | |
1465 | RD_STATE : WR_STATE; | |
1466 | status = nfs4_check_delegmode(*dp, flags); | |
1467 | if (status) | |
1468 | *dp = NULL; | |
1469 | out: | |
1470 | if (open->op_claim_type != NFS4_OPEN_CLAIM_DELEGATE_CUR) | |
1471 | return nfs_ok; | |
1472 | if (status) | |
1473 | return status; | |
1474 | open->op_stateowner->so_confirmed = 1; | |
1475 | return nfs_ok; | |
1476 | } | |
1477 | ||
1478 | static __be32 | |
1479 | nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_stateid **stpp) | |
1480 | { | |
1481 | struct nfs4_stateid *local; | |
1482 | __be32 status = nfserr_share_denied; | |
1483 | struct nfs4_stateowner *sop = open->op_stateowner; | |
1484 | ||
1485 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { | |
1486 | /* ignore lock owners */ | |
1487 | if (local->st_stateowner->so_is_open_owner == 0) | |
1488 | continue; | |
1489 | /* remember if we have seen this open owner */ | |
1490 | if (local->st_stateowner == sop) | |
1491 | *stpp = local; | |
1492 | /* check for conflicting share reservations */ | |
1493 | if (!test_share(local, open)) | |
1494 | goto out; | |
1495 | } | |
1496 | status = 0; | |
1497 | out: | |
1498 | return status; | |
1499 | } | |
1500 | ||
1501 | static inline struct nfs4_stateid * | |
1502 | nfs4_alloc_stateid(void) | |
1503 | { | |
1504 | return kmem_cache_alloc(stateid_slab, GFP_KERNEL); | |
1505 | } | |
1506 | ||
1507 | static __be32 | |
1508 | nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_stateid **stpp, | |
1509 | struct nfs4_delegation *dp, | |
1510 | struct svc_fh *cur_fh, int flags) | |
1511 | { | |
1512 | struct nfs4_stateid *stp; | |
1513 | ||
1514 | stp = nfs4_alloc_stateid(); | |
1515 | if (stp == NULL) | |
1516 | return nfserr_resource; | |
1517 | ||
1518 | if (dp) { | |
1519 | get_file(dp->dl_vfs_file); | |
1520 | stp->st_vfs_file = dp->dl_vfs_file; | |
1521 | } else { | |
1522 | __be32 status; | |
1523 | status = nfsd_open(rqstp, cur_fh, S_IFREG, flags, | |
1524 | &stp->st_vfs_file); | |
1525 | if (status) { | |
1526 | if (status == nfserr_dropit) | |
1527 | status = nfserr_jukebox; | |
1528 | kmem_cache_free(stateid_slab, stp); | |
1529 | return status; | |
1530 | } | |
1531 | } | |
1532 | *stpp = stp; | |
1533 | return 0; | |
1534 | } | |
1535 | ||
1536 | static inline __be32 | |
1537 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, | |
1538 | struct nfsd4_open *open) | |
1539 | { | |
1540 | struct iattr iattr = { | |
1541 | .ia_valid = ATTR_SIZE, | |
1542 | .ia_size = 0, | |
1543 | }; | |
1544 | if (!open->op_truncate) | |
1545 | return 0; | |
1546 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
1547 | return nfserr_inval; | |
1548 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); | |
1549 | } | |
1550 | ||
1551 | static __be32 | |
1552 | nfs4_upgrade_open(struct svc_rqst *rqstp, struct svc_fh *cur_fh, struct nfs4_stateid *stp, struct nfsd4_open *open) | |
1553 | { | |
1554 | struct file *filp = stp->st_vfs_file; | |
1555 | struct inode *inode = filp->f_path.dentry->d_inode; | |
1556 | unsigned int share_access, new_writer; | |
1557 | __be32 status; | |
1558 | ||
1559 | set_access(&share_access, stp->st_access_bmap); | |
1560 | new_writer = (~share_access) & open->op_share_access | |
1561 | & NFS4_SHARE_ACCESS_WRITE; | |
1562 | ||
1563 | if (new_writer) { | |
1564 | int err = get_write_access(inode); | |
1565 | if (err) | |
1566 | return nfserrno(err); | |
1567 | } | |
1568 | status = nfsd4_truncate(rqstp, cur_fh, open); | |
1569 | if (status) { | |
1570 | if (new_writer) | |
1571 | put_write_access(inode); | |
1572 | return status; | |
1573 | } | |
1574 | /* remember the open */ | |
1575 | filp->f_mode |= open->op_share_access; | |
1576 | set_bit(open->op_share_access, &stp->st_access_bmap); | |
1577 | set_bit(open->op_share_deny, &stp->st_deny_bmap); | |
1578 | ||
1579 | return nfs_ok; | |
1580 | } | |
1581 | ||
1582 | ||
1583 | static void | |
1584 | nfs4_set_claim_prev(struct nfsd4_open *open) | |
1585 | { | |
1586 | open->op_stateowner->so_confirmed = 1; | |
1587 | open->op_stateowner->so_client->cl_firststate = 1; | |
1588 | } | |
1589 | ||
1590 | /* | |
1591 | * Attempt to hand out a delegation. | |
1592 | */ | |
1593 | static void | |
1594 | nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_stateid *stp) | |
1595 | { | |
1596 | struct nfs4_delegation *dp; | |
1597 | struct nfs4_stateowner *sop = stp->st_stateowner; | |
1598 | struct nfs4_callback *cb = &sop->so_client->cl_callback; | |
1599 | struct file_lock fl, *flp = &fl; | |
1600 | int status, flag = 0; | |
1601 | ||
1602 | flag = NFS4_OPEN_DELEGATE_NONE; | |
1603 | open->op_recall = 0; | |
1604 | switch (open->op_claim_type) { | |
1605 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
1606 | if (!atomic_read(&cb->cb_set)) | |
1607 | open->op_recall = 1; | |
1608 | flag = open->op_delegate_type; | |
1609 | if (flag == NFS4_OPEN_DELEGATE_NONE) | |
1610 | goto out; | |
1611 | break; | |
1612 | case NFS4_OPEN_CLAIM_NULL: | |
1613 | /* Let's not give out any delegations till everyone's | |
1614 | * had the chance to reclaim theirs.... */ | |
1615 | if (nfs4_in_grace()) | |
1616 | goto out; | |
1617 | if (!atomic_read(&cb->cb_set) || !sop->so_confirmed) | |
1618 | goto out; | |
1619 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) | |
1620 | flag = NFS4_OPEN_DELEGATE_WRITE; | |
1621 | else | |
1622 | flag = NFS4_OPEN_DELEGATE_READ; | |
1623 | break; | |
1624 | default: | |
1625 | goto out; | |
1626 | } | |
1627 | ||
1628 | dp = alloc_init_deleg(sop->so_client, stp, fh, flag); | |
1629 | if (dp == NULL) { | |
1630 | flag = NFS4_OPEN_DELEGATE_NONE; | |
1631 | goto out; | |
1632 | } | |
1633 | locks_init_lock(&fl); | |
1634 | fl.fl_lmops = &nfsd_lease_mng_ops; | |
1635 | fl.fl_flags = FL_LEASE; | |
1636 | fl.fl_end = OFFSET_MAX; | |
1637 | fl.fl_owner = (fl_owner_t)dp; | |
1638 | fl.fl_file = stp->st_vfs_file; | |
1639 | fl.fl_pid = current->tgid; | |
1640 | ||
1641 | /* vfs_setlease checks to see if delegation should be handed out. | |
1642 | * the lock_manager callbacks fl_mylease and fl_change are used | |
1643 | */ | |
1644 | if ((status = vfs_setlease(stp->st_vfs_file, | |
1645 | flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK, &flp))) { | |
1646 | dprintk("NFSD: setlease failed [%d], no delegation\n", status); | |
1647 | unhash_delegation(dp); | |
1648 | flag = NFS4_OPEN_DELEGATE_NONE; | |
1649 | goto out; | |
1650 | } | |
1651 | ||
1652 | memcpy(&open->op_delegate_stateid, &dp->dl_stateid, sizeof(dp->dl_stateid)); | |
1653 | ||
1654 | dprintk("NFSD: delegation stateid=(%08x/%08x/%08x/%08x)\n\n", | |
1655 | dp->dl_stateid.si_boot, | |
1656 | dp->dl_stateid.si_stateownerid, | |
1657 | dp->dl_stateid.si_fileid, | |
1658 | dp->dl_stateid.si_generation); | |
1659 | out: | |
1660 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS | |
1661 | && flag == NFS4_OPEN_DELEGATE_NONE | |
1662 | && open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) | |
1663 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); | |
1664 | open->op_delegate_type = flag; | |
1665 | } | |
1666 | ||
1667 | /* | |
1668 | * called with nfs4_lock_state() held. | |
1669 | */ | |
1670 | __be32 | |
1671 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) | |
1672 | { | |
1673 | struct nfs4_file *fp = NULL; | |
1674 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
1675 | struct nfs4_stateid *stp = NULL; | |
1676 | struct nfs4_delegation *dp = NULL; | |
1677 | __be32 status; | |
1678 | ||
1679 | status = nfserr_inval; | |
1680 | if (!access_valid(open->op_share_access) | |
1681 | || !deny_valid(open->op_share_deny)) | |
1682 | goto out; | |
1683 | /* | |
1684 | * Lookup file; if found, lookup stateid and check open request, | |
1685 | * and check for delegations in the process of being recalled. | |
1686 | * If not found, create the nfs4_file struct | |
1687 | */ | |
1688 | fp = find_file(ino); | |
1689 | if (fp) { | |
1690 | if ((status = nfs4_check_open(fp, open, &stp))) | |
1691 | goto out; | |
1692 | status = nfs4_check_deleg(fp, open, &dp); | |
1693 | if (status) | |
1694 | goto out; | |
1695 | } else { | |
1696 | status = nfserr_bad_stateid; | |
1697 | if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) | |
1698 | goto out; | |
1699 | status = nfserr_resource; | |
1700 | fp = alloc_init_file(ino); | |
1701 | if (fp == NULL) | |
1702 | goto out; | |
1703 | } | |
1704 | ||
1705 | /* | |
1706 | * OPEN the file, or upgrade an existing OPEN. | |
1707 | * If truncate fails, the OPEN fails. | |
1708 | */ | |
1709 | if (stp) { | |
1710 | /* Stateid was found, this is an OPEN upgrade */ | |
1711 | status = nfs4_upgrade_open(rqstp, current_fh, stp, open); | |
1712 | if (status) | |
1713 | goto out; | |
1714 | update_stateid(&stp->st_stateid); | |
1715 | } else { | |
1716 | /* Stateid was not found, this is a new OPEN */ | |
1717 | int flags = 0; | |
1718 | if (open->op_share_access & NFS4_SHARE_ACCESS_READ) | |
1719 | flags |= MAY_READ; | |
1720 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) | |
1721 | flags |= MAY_WRITE; | |
1722 | status = nfs4_new_open(rqstp, &stp, dp, current_fh, flags); | |
1723 | if (status) | |
1724 | goto out; | |
1725 | init_stateid(stp, fp, open); | |
1726 | status = nfsd4_truncate(rqstp, current_fh, open); | |
1727 | if (status) { | |
1728 | release_stateid(stp, OPEN_STATE); | |
1729 | goto out; | |
1730 | } | |
1731 | } | |
1732 | memcpy(&open->op_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
1733 | ||
1734 | /* | |
1735 | * Attempt to hand out a delegation. No error return, because the | |
1736 | * OPEN succeeds even if we fail. | |
1737 | */ | |
1738 | nfs4_open_delegation(current_fh, open, stp); | |
1739 | ||
1740 | status = nfs_ok; | |
1741 | ||
1742 | dprintk("nfs4_process_open2: stateid=(%08x/%08x/%08x/%08x)\n", | |
1743 | stp->st_stateid.si_boot, stp->st_stateid.si_stateownerid, | |
1744 | stp->st_stateid.si_fileid, stp->st_stateid.si_generation); | |
1745 | out: | |
1746 | if (fp) | |
1747 | put_nfs4_file(fp); | |
1748 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) | |
1749 | nfs4_set_claim_prev(open); | |
1750 | /* | |
1751 | * To finish the open response, we just need to set the rflags. | |
1752 | */ | |
1753 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | |
1754 | if (!open->op_stateowner->so_confirmed) | |
1755 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; | |
1756 | ||
1757 | return status; | |
1758 | } | |
1759 | ||
1760 | static struct workqueue_struct *laundry_wq; | |
1761 | static void laundromat_main(struct work_struct *); | |
1762 | static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main); | |
1763 | ||
1764 | __be32 | |
1765 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
1766 | clientid_t *clid) | |
1767 | { | |
1768 | struct nfs4_client *clp; | |
1769 | __be32 status; | |
1770 | ||
1771 | nfs4_lock_state(); | |
1772 | dprintk("process_renew(%08x/%08x): starting\n", | |
1773 | clid->cl_boot, clid->cl_id); | |
1774 | status = nfserr_stale_clientid; | |
1775 | if (STALE_CLIENTID(clid)) | |
1776 | goto out; | |
1777 | clp = find_confirmed_client(clid); | |
1778 | status = nfserr_expired; | |
1779 | if (clp == NULL) { | |
1780 | /* We assume the client took too long to RENEW. */ | |
1781 | dprintk("nfsd4_renew: clientid not found!\n"); | |
1782 | goto out; | |
1783 | } | |
1784 | renew_client(clp); | |
1785 | status = nfserr_cb_path_down; | |
1786 | if (!list_empty(&clp->cl_delegations) | |
1787 | && !atomic_read(&clp->cl_callback.cb_set)) | |
1788 | goto out; | |
1789 | status = nfs_ok; | |
1790 | out: | |
1791 | nfs4_unlock_state(); | |
1792 | return status; | |
1793 | } | |
1794 | ||
1795 | static void | |
1796 | end_grace(void) | |
1797 | { | |
1798 | dprintk("NFSD: end of grace period\n"); | |
1799 | nfsd4_recdir_purge_old(); | |
1800 | in_grace = 0; | |
1801 | } | |
1802 | ||
1803 | static time_t | |
1804 | nfs4_laundromat(void) | |
1805 | { | |
1806 | struct nfs4_client *clp; | |
1807 | struct nfs4_stateowner *sop; | |
1808 | struct nfs4_delegation *dp; | |
1809 | struct list_head *pos, *next, reaplist; | |
1810 | time_t cutoff = get_seconds() - NFSD_LEASE_TIME; | |
1811 | time_t t, clientid_val = NFSD_LEASE_TIME; | |
1812 | time_t u, test_val = NFSD_LEASE_TIME; | |
1813 | ||
1814 | nfs4_lock_state(); | |
1815 | ||
1816 | dprintk("NFSD: laundromat service - starting\n"); | |
1817 | if (in_grace) | |
1818 | end_grace(); | |
1819 | list_for_each_safe(pos, next, &client_lru) { | |
1820 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
1821 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { | |
1822 | t = clp->cl_time - cutoff; | |
1823 | if (clientid_val > t) | |
1824 | clientid_val = t; | |
1825 | break; | |
1826 | } | |
1827 | dprintk("NFSD: purging unused client (clientid %08x)\n", | |
1828 | clp->cl_clientid.cl_id); | |
1829 | nfsd4_remove_clid_dir(clp); | |
1830 | expire_client(clp); | |
1831 | } | |
1832 | INIT_LIST_HEAD(&reaplist); | |
1833 | spin_lock(&recall_lock); | |
1834 | list_for_each_safe(pos, next, &del_recall_lru) { | |
1835 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
1836 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { | |
1837 | u = dp->dl_time - cutoff; | |
1838 | if (test_val > u) | |
1839 | test_val = u; | |
1840 | break; | |
1841 | } | |
1842 | dprintk("NFSD: purging unused delegation dp %p, fp %p\n", | |
1843 | dp, dp->dl_flock); | |
1844 | list_move(&dp->dl_recall_lru, &reaplist); | |
1845 | } | |
1846 | spin_unlock(&recall_lock); | |
1847 | list_for_each_safe(pos, next, &reaplist) { | |
1848 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
1849 | list_del_init(&dp->dl_recall_lru); | |
1850 | unhash_delegation(dp); | |
1851 | } | |
1852 | test_val = NFSD_LEASE_TIME; | |
1853 | list_for_each_safe(pos, next, &close_lru) { | |
1854 | sop = list_entry(pos, struct nfs4_stateowner, so_close_lru); | |
1855 | if (time_after((unsigned long)sop->so_time, (unsigned long)cutoff)) { | |
1856 | u = sop->so_time - cutoff; | |
1857 | if (test_val > u) | |
1858 | test_val = u; | |
1859 | break; | |
1860 | } | |
1861 | dprintk("NFSD: purging unused open stateowner (so_id %d)\n", | |
1862 | sop->so_id); | |
1863 | release_stateowner(sop); | |
1864 | } | |
1865 | if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) | |
1866 | clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; | |
1867 | nfs4_unlock_state(); | |
1868 | return clientid_val; | |
1869 | } | |
1870 | ||
1871 | void | |
1872 | laundromat_main(struct work_struct *not_used) | |
1873 | { | |
1874 | time_t t; | |
1875 | ||
1876 | t = nfs4_laundromat(); | |
1877 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); | |
1878 | queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); | |
1879 | } | |
1880 | ||
1881 | static struct nfs4_stateowner * | |
1882 | search_close_lru(u32 st_id, int flags) | |
1883 | { | |
1884 | struct nfs4_stateowner *local = NULL; | |
1885 | ||
1886 | if (flags & CLOSE_STATE) { | |
1887 | list_for_each_entry(local, &close_lru, so_close_lru) { | |
1888 | if (local->so_id == st_id) | |
1889 | return local; | |
1890 | } | |
1891 | } | |
1892 | return NULL; | |
1893 | } | |
1894 | ||
1895 | static inline int | |
1896 | nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stateid *stp) | |
1897 | { | |
1898 | return fhp->fh_dentry->d_inode != stp->st_vfs_file->f_path.dentry->d_inode; | |
1899 | } | |
1900 | ||
1901 | static int | |
1902 | STALE_STATEID(stateid_t *stateid) | |
1903 | { | |
1904 | if (stateid->si_boot == boot_time) | |
1905 | return 0; | |
1906 | dprintk("NFSD: stale stateid (%08x/%08x/%08x/%08x)!\n", | |
1907 | stateid->si_boot, stateid->si_stateownerid, stateid->si_fileid, | |
1908 | stateid->si_generation); | |
1909 | return 1; | |
1910 | } | |
1911 | ||
1912 | static inline int | |
1913 | access_permit_read(unsigned long access_bmap) | |
1914 | { | |
1915 | return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) || | |
1916 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) || | |
1917 | test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap); | |
1918 | } | |
1919 | ||
1920 | static inline int | |
1921 | access_permit_write(unsigned long access_bmap) | |
1922 | { | |
1923 | return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) || | |
1924 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap); | |
1925 | } | |
1926 | ||
1927 | static | |
1928 | __be32 nfs4_check_openmode(struct nfs4_stateid *stp, int flags) | |
1929 | { | |
1930 | __be32 status = nfserr_openmode; | |
1931 | ||
1932 | if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap))) | |
1933 | goto out; | |
1934 | if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap))) | |
1935 | goto out; | |
1936 | status = nfs_ok; | |
1937 | out: | |
1938 | return status; | |
1939 | } | |
1940 | ||
1941 | static inline __be32 | |
1942 | check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags) | |
1943 | { | |
1944 | /* Trying to call delegreturn with a special stateid? Yuch: */ | |
1945 | if (!(flags & (RD_STATE | WR_STATE))) | |
1946 | return nfserr_bad_stateid; | |
1947 | else if (ONE_STATEID(stateid) && (flags & RD_STATE)) | |
1948 | return nfs_ok; | |
1949 | else if (nfs4_in_grace()) { | |
1950 | /* Answer in remaining cases depends on existance of | |
1951 | * conflicting state; so we must wait out the grace period. */ | |
1952 | return nfserr_grace; | |
1953 | } else if (flags & WR_STATE) | |
1954 | return nfs4_share_conflict(current_fh, | |
1955 | NFS4_SHARE_DENY_WRITE); | |
1956 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ | |
1957 | return nfs4_share_conflict(current_fh, | |
1958 | NFS4_SHARE_DENY_READ); | |
1959 | } | |
1960 | ||
1961 | /* | |
1962 | * Allow READ/WRITE during grace period on recovered state only for files | |
1963 | * that are not able to provide mandatory locking. | |
1964 | */ | |
1965 | static inline int | |
1966 | io_during_grace_disallowed(struct inode *inode, int flags) | |
1967 | { | |
1968 | return nfs4_in_grace() && (flags & (RD_STATE | WR_STATE)) | |
1969 | && mandatory_lock(inode); | |
1970 | } | |
1971 | ||
1972 | /* | |
1973 | * Checks for stateid operations | |
1974 | */ | |
1975 | __be32 | |
1976 | nfs4_preprocess_stateid_op(struct svc_fh *current_fh, stateid_t *stateid, int flags, struct file **filpp) | |
1977 | { | |
1978 | struct nfs4_stateid *stp = NULL; | |
1979 | struct nfs4_delegation *dp = NULL; | |
1980 | stateid_t *stidp; | |
1981 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
1982 | __be32 status; | |
1983 | ||
1984 | dprintk("NFSD: preprocess_stateid_op: stateid = (%08x/%08x/%08x/%08x)\n", | |
1985 | stateid->si_boot, stateid->si_stateownerid, | |
1986 | stateid->si_fileid, stateid->si_generation); | |
1987 | if (filpp) | |
1988 | *filpp = NULL; | |
1989 | ||
1990 | if (io_during_grace_disallowed(ino, flags)) | |
1991 | return nfserr_grace; | |
1992 | ||
1993 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
1994 | return check_special_stateids(current_fh, stateid, flags); | |
1995 | ||
1996 | /* STALE STATEID */ | |
1997 | status = nfserr_stale_stateid; | |
1998 | if (STALE_STATEID(stateid)) | |
1999 | goto out; | |
2000 | ||
2001 | /* BAD STATEID */ | |
2002 | status = nfserr_bad_stateid; | |
2003 | if (!stateid->si_fileid) { /* delegation stateid */ | |
2004 | if(!(dp = find_delegation_stateid(ino, stateid))) { | |
2005 | dprintk("NFSD: delegation stateid not found\n"); | |
2006 | goto out; | |
2007 | } | |
2008 | stidp = &dp->dl_stateid; | |
2009 | } else { /* open or lock stateid */ | |
2010 | if (!(stp = find_stateid(stateid, flags))) { | |
2011 | dprintk("NFSD: open or lock stateid not found\n"); | |
2012 | goto out; | |
2013 | } | |
2014 | if ((flags & CHECK_FH) && nfs4_check_fh(current_fh, stp)) | |
2015 | goto out; | |
2016 | if (!stp->st_stateowner->so_confirmed) | |
2017 | goto out; | |
2018 | stidp = &stp->st_stateid; | |
2019 | } | |
2020 | if (stateid->si_generation > stidp->si_generation) | |
2021 | goto out; | |
2022 | ||
2023 | /* OLD STATEID */ | |
2024 | status = nfserr_old_stateid; | |
2025 | if (stateid->si_generation < stidp->si_generation) | |
2026 | goto out; | |
2027 | if (stp) { | |
2028 | if ((status = nfs4_check_openmode(stp,flags))) | |
2029 | goto out; | |
2030 | renew_client(stp->st_stateowner->so_client); | |
2031 | if (filpp) | |
2032 | *filpp = stp->st_vfs_file; | |
2033 | } else if (dp) { | |
2034 | if ((status = nfs4_check_delegmode(dp, flags))) | |
2035 | goto out; | |
2036 | renew_client(dp->dl_client); | |
2037 | if (flags & DELEG_RET) | |
2038 | unhash_delegation(dp); | |
2039 | if (filpp) | |
2040 | *filpp = dp->dl_vfs_file; | |
2041 | } | |
2042 | status = nfs_ok; | |
2043 | out: | |
2044 | return status; | |
2045 | } | |
2046 | ||
2047 | static inline int | |
2048 | setlkflg (int type) | |
2049 | { | |
2050 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? | |
2051 | RD_STATE : WR_STATE; | |
2052 | } | |
2053 | ||
2054 | /* | |
2055 | * Checks for sequence id mutating operations. | |
2056 | */ | |
2057 | static __be32 | |
2058 | 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) | |
2059 | { | |
2060 | struct nfs4_stateid *stp; | |
2061 | struct nfs4_stateowner *sop; | |
2062 | ||
2063 | dprintk("NFSD: preprocess_seqid_op: seqid=%d " | |
2064 | "stateid = (%08x/%08x/%08x/%08x)\n", seqid, | |
2065 | stateid->si_boot, stateid->si_stateownerid, stateid->si_fileid, | |
2066 | stateid->si_generation); | |
2067 | ||
2068 | *stpp = NULL; | |
2069 | *sopp = NULL; | |
2070 | ||
2071 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) { | |
2072 | dprintk("NFSD: preprocess_seqid_op: magic stateid!\n"); | |
2073 | return nfserr_bad_stateid; | |
2074 | } | |
2075 | ||
2076 | if (STALE_STATEID(stateid)) | |
2077 | return nfserr_stale_stateid; | |
2078 | /* | |
2079 | * We return BAD_STATEID if filehandle doesn't match stateid, | |
2080 | * the confirmed flag is incorrecly set, or the generation | |
2081 | * number is incorrect. | |
2082 | */ | |
2083 | stp = find_stateid(stateid, flags); | |
2084 | if (stp == NULL) { | |
2085 | /* | |
2086 | * Also, we should make sure this isn't just the result of | |
2087 | * a replayed close: | |
2088 | */ | |
2089 | sop = search_close_lru(stateid->si_stateownerid, flags); | |
2090 | if (sop == NULL) | |
2091 | return nfserr_bad_stateid; | |
2092 | *sopp = sop; | |
2093 | goto check_replay; | |
2094 | } | |
2095 | ||
2096 | if (lock) { | |
2097 | struct nfs4_stateowner *sop = stp->st_stateowner; | |
2098 | clientid_t *lockclid = &lock->v.new.clientid; | |
2099 | struct nfs4_client *clp = sop->so_client; | |
2100 | int lkflg = 0; | |
2101 | __be32 status; | |
2102 | ||
2103 | lkflg = setlkflg(lock->lk_type); | |
2104 | ||
2105 | if (lock->lk_is_new) { | |
2106 | if (!sop->so_is_open_owner) | |
2107 | return nfserr_bad_stateid; | |
2108 | if (!same_clid(&clp->cl_clientid, lockclid)) | |
2109 | return nfserr_bad_stateid; | |
2110 | /* stp is the open stateid */ | |
2111 | status = nfs4_check_openmode(stp, lkflg); | |
2112 | if (status) | |
2113 | return status; | |
2114 | } else { | |
2115 | /* stp is the lock stateid */ | |
2116 | status = nfs4_check_openmode(stp->st_openstp, lkflg); | |
2117 | if (status) | |
2118 | return status; | |
2119 | } | |
2120 | } | |
2121 | ||
2122 | if ((flags & CHECK_FH) && nfs4_check_fh(current_fh, stp)) { | |
2123 | dprintk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n"); | |
2124 | return nfserr_bad_stateid; | |
2125 | } | |
2126 | ||
2127 | *stpp = stp; | |
2128 | *sopp = sop = stp->st_stateowner; | |
2129 | ||
2130 | /* | |
2131 | * We now validate the seqid and stateid generation numbers. | |
2132 | * For the moment, we ignore the possibility of | |
2133 | * generation number wraparound. | |
2134 | */ | |
2135 | if (seqid != sop->so_seqid) | |
2136 | goto check_replay; | |
2137 | ||
2138 | if (sop->so_confirmed && flags & CONFIRM) { | |
2139 | dprintk("NFSD: preprocess_seqid_op: expected" | |
2140 | " unconfirmed stateowner!\n"); | |
2141 | return nfserr_bad_stateid; | |
2142 | } | |
2143 | if (!sop->so_confirmed && !(flags & CONFIRM)) { | |
2144 | dprintk("NFSD: preprocess_seqid_op: stateowner not" | |
2145 | " confirmed yet!\n"); | |
2146 | return nfserr_bad_stateid; | |
2147 | } | |
2148 | if (stateid->si_generation > stp->st_stateid.si_generation) { | |
2149 | dprintk("NFSD: preprocess_seqid_op: future stateid?!\n"); | |
2150 | return nfserr_bad_stateid; | |
2151 | } | |
2152 | ||
2153 | if (stateid->si_generation < stp->st_stateid.si_generation) { | |
2154 | dprintk("NFSD: preprocess_seqid_op: old stateid!\n"); | |
2155 | return nfserr_old_stateid; | |
2156 | } | |
2157 | renew_client(sop->so_client); | |
2158 | return nfs_ok; | |
2159 | ||
2160 | check_replay: | |
2161 | if (seqid == sop->so_seqid - 1) { | |
2162 | dprintk("NFSD: preprocess_seqid_op: retransmission?\n"); | |
2163 | /* indicate replay to calling function */ | |
2164 | return nfserr_replay_me; | |
2165 | } | |
2166 | dprintk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d)\n", | |
2167 | sop->so_seqid, seqid); | |
2168 | *sopp = NULL; | |
2169 | return nfserr_bad_seqid; | |
2170 | } | |
2171 | ||
2172 | __be32 | |
2173 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
2174 | struct nfsd4_open_confirm *oc) | |
2175 | { | |
2176 | __be32 status; | |
2177 | struct nfs4_stateowner *sop; | |
2178 | struct nfs4_stateid *stp; | |
2179 | ||
2180 | dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", | |
2181 | (int)cstate->current_fh.fh_dentry->d_name.len, | |
2182 | cstate->current_fh.fh_dentry->d_name.name); | |
2183 | ||
2184 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); | |
2185 | if (status) | |
2186 | return status; | |
2187 | ||
2188 | nfs4_lock_state(); | |
2189 | ||
2190 | if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh, | |
2191 | oc->oc_seqid, &oc->oc_req_stateid, | |
2192 | CHECK_FH | CONFIRM | OPEN_STATE, | |
2193 | &oc->oc_stateowner, &stp, NULL))) | |
2194 | goto out; | |
2195 | ||
2196 | sop = oc->oc_stateowner; | |
2197 | sop->so_confirmed = 1; | |
2198 | update_stateid(&stp->st_stateid); | |
2199 | memcpy(&oc->oc_resp_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
2200 | dprintk("NFSD: nfsd4_open_confirm: success, seqid=%d " | |
2201 | "stateid=(%08x/%08x/%08x/%08x)\n", oc->oc_seqid, | |
2202 | stp->st_stateid.si_boot, | |
2203 | stp->st_stateid.si_stateownerid, | |
2204 | stp->st_stateid.si_fileid, | |
2205 | stp->st_stateid.si_generation); | |
2206 | ||
2207 | nfsd4_create_clid_dir(sop->so_client); | |
2208 | out: | |
2209 | if (oc->oc_stateowner) { | |
2210 | nfs4_get_stateowner(oc->oc_stateowner); | |
2211 | cstate->replay_owner = oc->oc_stateowner; | |
2212 | } | |
2213 | nfs4_unlock_state(); | |
2214 | return status; | |
2215 | } | |
2216 | ||
2217 | ||
2218 | /* | |
2219 | * unset all bits in union bitmap (bmap) that | |
2220 | * do not exist in share (from successful OPEN_DOWNGRADE) | |
2221 | */ | |
2222 | static void | |
2223 | reset_union_bmap_access(unsigned long access, unsigned long *bmap) | |
2224 | { | |
2225 | int i; | |
2226 | for (i = 1; i < 4; i++) { | |
2227 | if ((i & access) != i) | |
2228 | __clear_bit(i, bmap); | |
2229 | } | |
2230 | } | |
2231 | ||
2232 | static void | |
2233 | reset_union_bmap_deny(unsigned long deny, unsigned long *bmap) | |
2234 | { | |
2235 | int i; | |
2236 | for (i = 0; i < 4; i++) { | |
2237 | if ((i & deny) != i) | |
2238 | __clear_bit(i, bmap); | |
2239 | } | |
2240 | } | |
2241 | ||
2242 | __be32 | |
2243 | nfsd4_open_downgrade(struct svc_rqst *rqstp, | |
2244 | struct nfsd4_compound_state *cstate, | |
2245 | struct nfsd4_open_downgrade *od) | |
2246 | { | |
2247 | __be32 status; | |
2248 | struct nfs4_stateid *stp; | |
2249 | unsigned int share_access; | |
2250 | ||
2251 | dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", | |
2252 | (int)cstate->current_fh.fh_dentry->d_name.len, | |
2253 | cstate->current_fh.fh_dentry->d_name.name); | |
2254 | ||
2255 | if (!access_valid(od->od_share_access) | |
2256 | || !deny_valid(od->od_share_deny)) | |
2257 | return nfserr_inval; | |
2258 | ||
2259 | nfs4_lock_state(); | |
2260 | if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh, | |
2261 | od->od_seqid, | |
2262 | &od->od_stateid, | |
2263 | CHECK_FH | OPEN_STATE, | |
2264 | &od->od_stateowner, &stp, NULL))) | |
2265 | goto out; | |
2266 | ||
2267 | status = nfserr_inval; | |
2268 | if (!test_bit(od->od_share_access, &stp->st_access_bmap)) { | |
2269 | dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n", | |
2270 | stp->st_access_bmap, od->od_share_access); | |
2271 | goto out; | |
2272 | } | |
2273 | if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) { | |
2274 | dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", | |
2275 | stp->st_deny_bmap, od->od_share_deny); | |
2276 | goto out; | |
2277 | } | |
2278 | set_access(&share_access, stp->st_access_bmap); | |
2279 | nfs4_file_downgrade(stp->st_vfs_file, | |
2280 | share_access & ~od->od_share_access); | |
2281 | ||
2282 | reset_union_bmap_access(od->od_share_access, &stp->st_access_bmap); | |
2283 | reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap); | |
2284 | ||
2285 | update_stateid(&stp->st_stateid); | |
2286 | memcpy(&od->od_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
2287 | status = nfs_ok; | |
2288 | out: | |
2289 | if (od->od_stateowner) { | |
2290 | nfs4_get_stateowner(od->od_stateowner); | |
2291 | cstate->replay_owner = od->od_stateowner; | |
2292 | } | |
2293 | nfs4_unlock_state(); | |
2294 | return status; | |
2295 | } | |
2296 | ||
2297 | /* | |
2298 | * nfs4_unlock_state() called after encode | |
2299 | */ | |
2300 | __be32 | |
2301 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
2302 | struct nfsd4_close *close) | |
2303 | { | |
2304 | __be32 status; | |
2305 | struct nfs4_stateid *stp; | |
2306 | ||
2307 | dprintk("NFSD: nfsd4_close on file %.*s\n", | |
2308 | (int)cstate->current_fh.fh_dentry->d_name.len, | |
2309 | cstate->current_fh.fh_dentry->d_name.name); | |
2310 | ||
2311 | nfs4_lock_state(); | |
2312 | /* check close_lru for replay */ | |
2313 | if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh, | |
2314 | close->cl_seqid, | |
2315 | &close->cl_stateid, | |
2316 | CHECK_FH | OPEN_STATE | CLOSE_STATE, | |
2317 | &close->cl_stateowner, &stp, NULL))) | |
2318 | goto out; | |
2319 | status = nfs_ok; | |
2320 | update_stateid(&stp->st_stateid); | |
2321 | memcpy(&close->cl_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
2322 | ||
2323 | /* release_stateid() calls nfsd_close() if needed */ | |
2324 | release_stateid(stp, OPEN_STATE); | |
2325 | ||
2326 | /* place unused nfs4_stateowners on so_close_lru list to be | |
2327 | * released by the laundromat service after the lease period | |
2328 | * to enable us to handle CLOSE replay | |
2329 | */ | |
2330 | if (list_empty(&close->cl_stateowner->so_stateids)) | |
2331 | move_to_close_lru(close->cl_stateowner); | |
2332 | out: | |
2333 | if (close->cl_stateowner) { | |
2334 | nfs4_get_stateowner(close->cl_stateowner); | |
2335 | cstate->replay_owner = close->cl_stateowner; | |
2336 | } | |
2337 | nfs4_unlock_state(); | |
2338 | return status; | |
2339 | } | |
2340 | ||
2341 | __be32 | |
2342 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
2343 | struct nfsd4_delegreturn *dr) | |
2344 | { | |
2345 | __be32 status; | |
2346 | ||
2347 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) | |
2348 | goto out; | |
2349 | ||
2350 | nfs4_lock_state(); | |
2351 | status = nfs4_preprocess_stateid_op(&cstate->current_fh, | |
2352 | &dr->dr_stateid, DELEG_RET, NULL); | |
2353 | nfs4_unlock_state(); | |
2354 | out: | |
2355 | return status; | |
2356 | } | |
2357 | ||
2358 | ||
2359 | /* | |
2360 | * Lock owner state (byte-range locks) | |
2361 | */ | |
2362 | #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) | |
2363 | #define LOCK_HASH_BITS 8 | |
2364 | #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS) | |
2365 | #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1) | |
2366 | ||
2367 | #define lockownerid_hashval(id) \ | |
2368 | ((id) & LOCK_HASH_MASK) | |
2369 | ||
2370 | static inline unsigned int | |
2371 | lock_ownerstr_hashval(struct inode *inode, u32 cl_id, | |
2372 | struct xdr_netobj *ownername) | |
2373 | { | |
2374 | return (file_hashval(inode) + cl_id | |
2375 | + opaque_hashval(ownername->data, ownername->len)) | |
2376 | & LOCK_HASH_MASK; | |
2377 | } | |
2378 | ||
2379 | static struct list_head lock_ownerid_hashtbl[LOCK_HASH_SIZE]; | |
2380 | static struct list_head lock_ownerstr_hashtbl[LOCK_HASH_SIZE]; | |
2381 | static struct list_head lockstateid_hashtbl[STATEID_HASH_SIZE]; | |
2382 | ||
2383 | static struct nfs4_stateid * | |
2384 | find_stateid(stateid_t *stid, int flags) | |
2385 | { | |
2386 | struct nfs4_stateid *local = NULL; | |
2387 | u32 st_id = stid->si_stateownerid; | |
2388 | u32 f_id = stid->si_fileid; | |
2389 | unsigned int hashval; | |
2390 | ||
2391 | dprintk("NFSD: find_stateid flags 0x%x\n",flags); | |
2392 | if ((flags & LOCK_STATE) || (flags & RD_STATE) || (flags & WR_STATE)) { | |
2393 | hashval = stateid_hashval(st_id, f_id); | |
2394 | list_for_each_entry(local, &lockstateid_hashtbl[hashval], st_hash) { | |
2395 | if ((local->st_stateid.si_stateownerid == st_id) && | |
2396 | (local->st_stateid.si_fileid == f_id)) | |
2397 | return local; | |
2398 | } | |
2399 | } | |
2400 | if ((flags & OPEN_STATE) || (flags & RD_STATE) || (flags & WR_STATE)) { | |
2401 | hashval = stateid_hashval(st_id, f_id); | |
2402 | list_for_each_entry(local, &stateid_hashtbl[hashval], st_hash) { | |
2403 | if ((local->st_stateid.si_stateownerid == st_id) && | |
2404 | (local->st_stateid.si_fileid == f_id)) | |
2405 | return local; | |
2406 | } | |
2407 | } | |
2408 | return NULL; | |
2409 | } | |
2410 | ||
2411 | static struct nfs4_delegation * | |
2412 | find_delegation_stateid(struct inode *ino, stateid_t *stid) | |
2413 | { | |
2414 | struct nfs4_file *fp; | |
2415 | struct nfs4_delegation *dl; | |
2416 | ||
2417 | dprintk("NFSD:find_delegation_stateid stateid=(%08x/%08x/%08x/%08x)\n", | |
2418 | stid->si_boot, stid->si_stateownerid, | |
2419 | stid->si_fileid, stid->si_generation); | |
2420 | ||
2421 | fp = find_file(ino); | |
2422 | if (!fp) | |
2423 | return NULL; | |
2424 | dl = find_delegation_file(fp, stid); | |
2425 | put_nfs4_file(fp); | |
2426 | return dl; | |
2427 | } | |
2428 | ||
2429 | /* | |
2430 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | |
2431 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | |
2432 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | |
2433 | * locking, this prevents us from being completely protocol-compliant. The | |
2434 | * real solution to this problem is to start using unsigned file offsets in | |
2435 | * the VFS, but this is a very deep change! | |
2436 | */ | |
2437 | static inline void | |
2438 | nfs4_transform_lock_offset(struct file_lock *lock) | |
2439 | { | |
2440 | if (lock->fl_start < 0) | |
2441 | lock->fl_start = OFFSET_MAX; | |
2442 | if (lock->fl_end < 0) | |
2443 | lock->fl_end = OFFSET_MAX; | |
2444 | } | |
2445 | ||
2446 | /* Hack!: For now, we're defining this just so we can use a pointer to it | |
2447 | * as a unique cookie to identify our (NFSv4's) posix locks. */ | |
2448 | static struct lock_manager_operations nfsd_posix_mng_ops = { | |
2449 | }; | |
2450 | ||
2451 | static inline void | |
2452 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | |
2453 | { | |
2454 | struct nfs4_stateowner *sop; | |
2455 | unsigned int hval; | |
2456 | ||
2457 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { | |
2458 | sop = (struct nfs4_stateowner *) fl->fl_owner; | |
2459 | hval = lockownerid_hashval(sop->so_id); | |
2460 | kref_get(&sop->so_ref); | |
2461 | deny->ld_sop = sop; | |
2462 | deny->ld_clientid = sop->so_client->cl_clientid; | |
2463 | } else { | |
2464 | deny->ld_sop = NULL; | |
2465 | deny->ld_clientid.cl_boot = 0; | |
2466 | deny->ld_clientid.cl_id = 0; | |
2467 | } | |
2468 | deny->ld_start = fl->fl_start; | |
2469 | deny->ld_length = ~(u64)0; | |
2470 | if (fl->fl_end != ~(u64)0) | |
2471 | deny->ld_length = fl->fl_end - fl->fl_start + 1; | |
2472 | deny->ld_type = NFS4_READ_LT; | |
2473 | if (fl->fl_type != F_RDLCK) | |
2474 | deny->ld_type = NFS4_WRITE_LT; | |
2475 | } | |
2476 | ||
2477 | static struct nfs4_stateowner * | |
2478 | find_lockstateowner_str(struct inode *inode, clientid_t *clid, | |
2479 | struct xdr_netobj *owner) | |
2480 | { | |
2481 | unsigned int hashval = lock_ownerstr_hashval(inode, clid->cl_id, owner); | |
2482 | struct nfs4_stateowner *op; | |
2483 | ||
2484 | list_for_each_entry(op, &lock_ownerstr_hashtbl[hashval], so_strhash) { | |
2485 | if (same_owner_str(op, owner, clid)) | |
2486 | return op; | |
2487 | } | |
2488 | return NULL; | |
2489 | } | |
2490 | ||
2491 | /* | |
2492 | * Alloc a lock owner structure. | |
2493 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | |
2494 | * occured. | |
2495 | * | |
2496 | * strhashval = lock_ownerstr_hashval | |
2497 | */ | |
2498 | ||
2499 | static struct nfs4_stateowner * | |
2500 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_stateid *open_stp, struct nfsd4_lock *lock) { | |
2501 | struct nfs4_stateowner *sop; | |
2502 | struct nfs4_replay *rp; | |
2503 | unsigned int idhashval; | |
2504 | ||
2505 | if (!(sop = alloc_stateowner(&lock->lk_new_owner))) | |
2506 | return NULL; | |
2507 | idhashval = lockownerid_hashval(current_ownerid); | |
2508 | INIT_LIST_HEAD(&sop->so_idhash); | |
2509 | INIT_LIST_HEAD(&sop->so_strhash); | |
2510 | INIT_LIST_HEAD(&sop->so_perclient); | |
2511 | INIT_LIST_HEAD(&sop->so_stateids); | |
2512 | INIT_LIST_HEAD(&sop->so_perstateid); | |
2513 | INIT_LIST_HEAD(&sop->so_close_lru); /* not used */ | |
2514 | sop->so_time = 0; | |
2515 | list_add(&sop->so_idhash, &lock_ownerid_hashtbl[idhashval]); | |
2516 | list_add(&sop->so_strhash, &lock_ownerstr_hashtbl[strhashval]); | |
2517 | list_add(&sop->so_perstateid, &open_stp->st_lockowners); | |
2518 | sop->so_is_open_owner = 0; | |
2519 | sop->so_id = current_ownerid++; | |
2520 | sop->so_client = clp; | |
2521 | /* It is the openowner seqid that will be incremented in encode in the | |
2522 | * case of new lockowners; so increment the lock seqid manually: */ | |
2523 | sop->so_seqid = lock->lk_new_lock_seqid + 1; | |
2524 | sop->so_confirmed = 1; | |
2525 | rp = &sop->so_replay; | |
2526 | rp->rp_status = nfserr_serverfault; | |
2527 | rp->rp_buflen = 0; | |
2528 | rp->rp_buf = rp->rp_ibuf; | |
2529 | return sop; | |
2530 | } | |
2531 | ||
2532 | static struct nfs4_stateid * | |
2533 | alloc_init_lock_stateid(struct nfs4_stateowner *sop, struct nfs4_file *fp, struct nfs4_stateid *open_stp) | |
2534 | { | |
2535 | struct nfs4_stateid *stp; | |
2536 | unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); | |
2537 | ||
2538 | stp = nfs4_alloc_stateid(); | |
2539 | if (stp == NULL) | |
2540 | goto out; | |
2541 | INIT_LIST_HEAD(&stp->st_hash); | |
2542 | INIT_LIST_HEAD(&stp->st_perfile); | |
2543 | INIT_LIST_HEAD(&stp->st_perstateowner); | |
2544 | INIT_LIST_HEAD(&stp->st_lockowners); /* not used */ | |
2545 | list_add(&stp->st_hash, &lockstateid_hashtbl[hashval]); | |
2546 | list_add(&stp->st_perfile, &fp->fi_stateids); | |
2547 | list_add(&stp->st_perstateowner, &sop->so_stateids); | |
2548 | stp->st_stateowner = sop; | |
2549 | get_nfs4_file(fp); | |
2550 | stp->st_file = fp; | |
2551 | stp->st_stateid.si_boot = boot_time; | |
2552 | stp->st_stateid.si_stateownerid = sop->so_id; | |
2553 | stp->st_stateid.si_fileid = fp->fi_id; | |
2554 | stp->st_stateid.si_generation = 0; | |
2555 | stp->st_vfs_file = open_stp->st_vfs_file; /* FIXME refcount?? */ | |
2556 | stp->st_access_bmap = open_stp->st_access_bmap; | |
2557 | stp->st_deny_bmap = open_stp->st_deny_bmap; | |
2558 | stp->st_openstp = open_stp; | |
2559 | ||
2560 | out: | |
2561 | return stp; | |
2562 | } | |
2563 | ||
2564 | static int | |
2565 | check_lock_length(u64 offset, u64 length) | |
2566 | { | |
2567 | return ((length == 0) || ((length != ~(u64)0) && | |
2568 | LOFF_OVERFLOW(offset, length))); | |
2569 | } | |
2570 | ||
2571 | /* | |
2572 | * LOCK operation | |
2573 | */ | |
2574 | __be32 | |
2575 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
2576 | struct nfsd4_lock *lock) | |
2577 | { | |
2578 | struct nfs4_stateowner *open_sop = NULL; | |
2579 | struct nfs4_stateowner *lock_sop = NULL; | |
2580 | struct nfs4_stateid *lock_stp; | |
2581 | struct file *filp; | |
2582 | struct file_lock file_lock; | |
2583 | struct file_lock conflock; | |
2584 | __be32 status = 0; | |
2585 | unsigned int strhashval; | |
2586 | unsigned int cmd; | |
2587 | int err; | |
2588 | ||
2589 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | |
2590 | (long long) lock->lk_offset, | |
2591 | (long long) lock->lk_length); | |
2592 | ||
2593 | if (check_lock_length(lock->lk_offset, lock->lk_length)) | |
2594 | return nfserr_inval; | |
2595 | ||
2596 | if ((status = fh_verify(rqstp, &cstate->current_fh, | |
2597 | S_IFREG, MAY_LOCK))) { | |
2598 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); | |
2599 | return status; | |
2600 | } | |
2601 | ||
2602 | nfs4_lock_state(); | |
2603 | ||
2604 | if (lock->lk_is_new) { | |
2605 | /* | |
2606 | * Client indicates that this is a new lockowner. | |
2607 | * Use open owner and open stateid to create lock owner and | |
2608 | * lock stateid. | |
2609 | */ | |
2610 | struct nfs4_stateid *open_stp = NULL; | |
2611 | struct nfs4_file *fp; | |
2612 | ||
2613 | status = nfserr_stale_clientid; | |
2614 | if (STALE_CLIENTID(&lock->lk_new_clientid)) | |
2615 | goto out; | |
2616 | ||
2617 | /* validate and update open stateid and open seqid */ | |
2618 | status = nfs4_preprocess_seqid_op(&cstate->current_fh, | |
2619 | lock->lk_new_open_seqid, | |
2620 | &lock->lk_new_open_stateid, | |
2621 | CHECK_FH | OPEN_STATE, | |
2622 | &lock->lk_replay_owner, &open_stp, | |
2623 | lock); | |
2624 | if (status) | |
2625 | goto out; | |
2626 | open_sop = lock->lk_replay_owner; | |
2627 | /* create lockowner and lock stateid */ | |
2628 | fp = open_stp->st_file; | |
2629 | strhashval = lock_ownerstr_hashval(fp->fi_inode, | |
2630 | open_sop->so_client->cl_clientid.cl_id, | |
2631 | &lock->v.new.owner); | |
2632 | /* XXX: Do we need to check for duplicate stateowners on | |
2633 | * the same file, or should they just be allowed (and | |
2634 | * create new stateids)? */ | |
2635 | status = nfserr_resource; | |
2636 | lock_sop = alloc_init_lock_stateowner(strhashval, | |
2637 | open_sop->so_client, open_stp, lock); | |
2638 | if (lock_sop == NULL) | |
2639 | goto out; | |
2640 | lock_stp = alloc_init_lock_stateid(lock_sop, fp, open_stp); | |
2641 | if (lock_stp == NULL) | |
2642 | goto out; | |
2643 | } else { | |
2644 | /* lock (lock owner + lock stateid) already exists */ | |
2645 | status = nfs4_preprocess_seqid_op(&cstate->current_fh, | |
2646 | lock->lk_old_lock_seqid, | |
2647 | &lock->lk_old_lock_stateid, | |
2648 | CHECK_FH | LOCK_STATE, | |
2649 | &lock->lk_replay_owner, &lock_stp, lock); | |
2650 | if (status) | |
2651 | goto out; | |
2652 | lock_sop = lock->lk_replay_owner; | |
2653 | } | |
2654 | /* lock->lk_replay_owner and lock_stp have been created or found */ | |
2655 | filp = lock_stp->st_vfs_file; | |
2656 | ||
2657 | status = nfserr_grace; | |
2658 | if (nfs4_in_grace() && !lock->lk_reclaim) | |
2659 | goto out; | |
2660 | status = nfserr_no_grace; | |
2661 | if (!nfs4_in_grace() && lock->lk_reclaim) | |
2662 | goto out; | |
2663 | ||
2664 | locks_init_lock(&file_lock); | |
2665 | switch (lock->lk_type) { | |
2666 | case NFS4_READ_LT: | |
2667 | case NFS4_READW_LT: | |
2668 | file_lock.fl_type = F_RDLCK; | |
2669 | cmd = F_SETLK; | |
2670 | break; | |
2671 | case NFS4_WRITE_LT: | |
2672 | case NFS4_WRITEW_LT: | |
2673 | file_lock.fl_type = F_WRLCK; | |
2674 | cmd = F_SETLK; | |
2675 | break; | |
2676 | default: | |
2677 | status = nfserr_inval; | |
2678 | goto out; | |
2679 | } | |
2680 | file_lock.fl_owner = (fl_owner_t)lock_sop; | |
2681 | file_lock.fl_pid = current->tgid; | |
2682 | file_lock.fl_file = filp; | |
2683 | file_lock.fl_flags = FL_POSIX; | |
2684 | file_lock.fl_lmops = &nfsd_posix_mng_ops; | |
2685 | ||
2686 | file_lock.fl_start = lock->lk_offset; | |
2687 | if ((lock->lk_length == ~(u64)0) || | |
2688 | LOFF_OVERFLOW(lock->lk_offset, lock->lk_length)) | |
2689 | file_lock.fl_end = ~(u64)0; | |
2690 | else | |
2691 | file_lock.fl_end = lock->lk_offset + lock->lk_length - 1; | |
2692 | nfs4_transform_lock_offset(&file_lock); | |
2693 | ||
2694 | /* | |
2695 | * Try to lock the file in the VFS. | |
2696 | * Note: locks.c uses the BKL to protect the inode's lock list. | |
2697 | */ | |
2698 | ||
2699 | /* XXX?: Just to divert the locks_release_private at the start of | |
2700 | * locks_copy_lock: */ | |
2701 | locks_init_lock(&conflock); | |
2702 | err = vfs_lock_file(filp, cmd, &file_lock, &conflock); | |
2703 | switch (-err) { | |
2704 | case 0: /* success! */ | |
2705 | update_stateid(&lock_stp->st_stateid); | |
2706 | memcpy(&lock->lk_resp_stateid, &lock_stp->st_stateid, | |
2707 | sizeof(stateid_t)); | |
2708 | status = 0; | |
2709 | break; | |
2710 | case (EAGAIN): /* conflock holds conflicting lock */ | |
2711 | status = nfserr_denied; | |
2712 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | |
2713 | nfs4_set_lock_denied(&conflock, &lock->lk_denied); | |
2714 | break; | |
2715 | case (EDEADLK): | |
2716 | status = nfserr_deadlock; | |
2717 | break; | |
2718 | default: | |
2719 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); | |
2720 | status = nfserr_resource; | |
2721 | break; | |
2722 | } | |
2723 | out: | |
2724 | if (status && lock->lk_is_new && lock_sop) | |
2725 | release_stateowner(lock_sop); | |
2726 | if (lock->lk_replay_owner) { | |
2727 | nfs4_get_stateowner(lock->lk_replay_owner); | |
2728 | cstate->replay_owner = lock->lk_replay_owner; | |
2729 | } | |
2730 | nfs4_unlock_state(); | |
2731 | return status; | |
2732 | } | |
2733 | ||
2734 | /* | |
2735 | * LOCKT operation | |
2736 | */ | |
2737 | __be32 | |
2738 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
2739 | struct nfsd4_lockt *lockt) | |
2740 | { | |
2741 | struct inode *inode; | |
2742 | struct file file; | |
2743 | struct file_lock file_lock; | |
2744 | int error; | |
2745 | __be32 status; | |
2746 | ||
2747 | if (nfs4_in_grace()) | |
2748 | return nfserr_grace; | |
2749 | ||
2750 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | |
2751 | return nfserr_inval; | |
2752 | ||
2753 | lockt->lt_stateowner = NULL; | |
2754 | nfs4_lock_state(); | |
2755 | ||
2756 | status = nfserr_stale_clientid; | |
2757 | if (STALE_CLIENTID(&lockt->lt_clientid)) | |
2758 | goto out; | |
2759 | ||
2760 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) { | |
2761 | dprintk("NFSD: nfsd4_lockt: fh_verify() failed!\n"); | |
2762 | if (status == nfserr_symlink) | |
2763 | status = nfserr_inval; | |
2764 | goto out; | |
2765 | } | |
2766 | ||
2767 | inode = cstate->current_fh.fh_dentry->d_inode; | |
2768 | locks_init_lock(&file_lock); | |
2769 | switch (lockt->lt_type) { | |
2770 | case NFS4_READ_LT: | |
2771 | case NFS4_READW_LT: | |
2772 | file_lock.fl_type = F_RDLCK; | |
2773 | break; | |
2774 | case NFS4_WRITE_LT: | |
2775 | case NFS4_WRITEW_LT: | |
2776 | file_lock.fl_type = F_WRLCK; | |
2777 | break; | |
2778 | default: | |
2779 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); | |
2780 | status = nfserr_inval; | |
2781 | goto out; | |
2782 | } | |
2783 | ||
2784 | lockt->lt_stateowner = find_lockstateowner_str(inode, | |
2785 | &lockt->lt_clientid, &lockt->lt_owner); | |
2786 | if (lockt->lt_stateowner) | |
2787 | file_lock.fl_owner = (fl_owner_t)lockt->lt_stateowner; | |
2788 | file_lock.fl_pid = current->tgid; | |
2789 | file_lock.fl_flags = FL_POSIX; | |
2790 | file_lock.fl_lmops = &nfsd_posix_mng_ops; | |
2791 | ||
2792 | file_lock.fl_start = lockt->lt_offset; | |
2793 | if ((lockt->lt_length == ~(u64)0) || LOFF_OVERFLOW(lockt->lt_offset, lockt->lt_length)) | |
2794 | file_lock.fl_end = ~(u64)0; | |
2795 | else | |
2796 | file_lock.fl_end = lockt->lt_offset + lockt->lt_length - 1; | |
2797 | ||
2798 | nfs4_transform_lock_offset(&file_lock); | |
2799 | ||
2800 | /* vfs_test_lock uses the struct file _only_ to resolve the inode. | |
2801 | * since LOCKT doesn't require an OPEN, and therefore a struct | |
2802 | * file may not exist, pass vfs_test_lock a struct file with | |
2803 | * only the dentry:inode set. | |
2804 | */ | |
2805 | memset(&file, 0, sizeof (struct file)); | |
2806 | file.f_path.dentry = cstate->current_fh.fh_dentry; | |
2807 | ||
2808 | status = nfs_ok; | |
2809 | error = vfs_test_lock(&file, &file_lock); | |
2810 | if (error) { | |
2811 | status = nfserrno(error); | |
2812 | goto out; | |
2813 | } | |
2814 | if (file_lock.fl_type != F_UNLCK) { | |
2815 | status = nfserr_denied; | |
2816 | nfs4_set_lock_denied(&file_lock, &lockt->lt_denied); | |
2817 | } | |
2818 | out: | |
2819 | nfs4_unlock_state(); | |
2820 | return status; | |
2821 | } | |
2822 | ||
2823 | __be32 | |
2824 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, | |
2825 | struct nfsd4_locku *locku) | |
2826 | { | |
2827 | struct nfs4_stateid *stp; | |
2828 | struct file *filp = NULL; | |
2829 | struct file_lock file_lock; | |
2830 | __be32 status; | |
2831 | int err; | |
2832 | ||
2833 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", | |
2834 | (long long) locku->lu_offset, | |
2835 | (long long) locku->lu_length); | |
2836 | ||
2837 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | |
2838 | return nfserr_inval; | |
2839 | ||
2840 | nfs4_lock_state(); | |
2841 | ||
2842 | if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh, | |
2843 | locku->lu_seqid, | |
2844 | &locku->lu_stateid, | |
2845 | CHECK_FH | LOCK_STATE, | |
2846 | &locku->lu_stateowner, &stp, NULL))) | |
2847 | goto out; | |
2848 | ||
2849 | filp = stp->st_vfs_file; | |
2850 | BUG_ON(!filp); | |
2851 | locks_init_lock(&file_lock); | |
2852 | file_lock.fl_type = F_UNLCK; | |
2853 | file_lock.fl_owner = (fl_owner_t) locku->lu_stateowner; | |
2854 | file_lock.fl_pid = current->tgid; | |
2855 | file_lock.fl_file = filp; | |
2856 | file_lock.fl_flags = FL_POSIX; | |
2857 | file_lock.fl_lmops = &nfsd_posix_mng_ops; | |
2858 | file_lock.fl_start = locku->lu_offset; | |
2859 | ||
2860 | if ((locku->lu_length == ~(u64)0) || LOFF_OVERFLOW(locku->lu_offset, locku->lu_length)) | |
2861 | file_lock.fl_end = ~(u64)0; | |
2862 | else | |
2863 | file_lock.fl_end = locku->lu_offset + locku->lu_length - 1; | |
2864 | nfs4_transform_lock_offset(&file_lock); | |
2865 | ||
2866 | /* | |
2867 | * Try to unlock the file in the VFS. | |
2868 | */ | |
2869 | err = vfs_lock_file(filp, F_SETLK, &file_lock, NULL); | |
2870 | if (err) { | |
2871 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); | |
2872 | goto out_nfserr; | |
2873 | } | |
2874 | /* | |
2875 | * OK, unlock succeeded; the only thing left to do is update the stateid. | |
2876 | */ | |
2877 | update_stateid(&stp->st_stateid); | |
2878 | memcpy(&locku->lu_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
2879 | ||
2880 | out: | |
2881 | if (locku->lu_stateowner) { | |
2882 | nfs4_get_stateowner(locku->lu_stateowner); | |
2883 | cstate->replay_owner = locku->lu_stateowner; | |
2884 | } | |
2885 | nfs4_unlock_state(); | |
2886 | return status; | |
2887 | ||
2888 | out_nfserr: | |
2889 | status = nfserrno(err); | |
2890 | goto out; | |
2891 | } | |
2892 | ||
2893 | /* | |
2894 | * returns | |
2895 | * 1: locks held by lockowner | |
2896 | * 0: no locks held by lockowner | |
2897 | */ | |
2898 | static int | |
2899 | check_for_locks(struct file *filp, struct nfs4_stateowner *lowner) | |
2900 | { | |
2901 | struct file_lock **flpp; | |
2902 | struct inode *inode = filp->f_path.dentry->d_inode; | |
2903 | int status = 0; | |
2904 | ||
2905 | lock_kernel(); | |
2906 | for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { | |
2907 | if ((*flpp)->fl_owner == (fl_owner_t)lowner) { | |
2908 | status = 1; | |
2909 | goto out; | |
2910 | } | |
2911 | } | |
2912 | out: | |
2913 | unlock_kernel(); | |
2914 | return status; | |
2915 | } | |
2916 | ||
2917 | __be32 | |
2918 | nfsd4_release_lockowner(struct svc_rqst *rqstp, | |
2919 | struct nfsd4_compound_state *cstate, | |
2920 | struct nfsd4_release_lockowner *rlockowner) | |
2921 | { | |
2922 | clientid_t *clid = &rlockowner->rl_clientid; | |
2923 | struct nfs4_stateowner *sop; | |
2924 | struct nfs4_stateid *stp; | |
2925 | struct xdr_netobj *owner = &rlockowner->rl_owner; | |
2926 | struct list_head matches; | |
2927 | int i; | |
2928 | __be32 status; | |
2929 | ||
2930 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | |
2931 | clid->cl_boot, clid->cl_id); | |
2932 | ||
2933 | /* XXX check for lease expiration */ | |
2934 | ||
2935 | status = nfserr_stale_clientid; | |
2936 | if (STALE_CLIENTID(clid)) | |
2937 | return status; | |
2938 | ||
2939 | nfs4_lock_state(); | |
2940 | ||
2941 | status = nfserr_locks_held; | |
2942 | /* XXX: we're doing a linear search through all the lockowners. | |
2943 | * Yipes! For now we'll just hope clients aren't really using | |
2944 | * release_lockowner much, but eventually we have to fix these | |
2945 | * data structures. */ | |
2946 | INIT_LIST_HEAD(&matches); | |
2947 | for (i = 0; i < LOCK_HASH_SIZE; i++) { | |
2948 | list_for_each_entry(sop, &lock_ownerid_hashtbl[i], so_idhash) { | |
2949 | if (!same_owner_str(sop, owner, clid)) | |
2950 | continue; | |
2951 | list_for_each_entry(stp, &sop->so_stateids, | |
2952 | st_perstateowner) { | |
2953 | if (check_for_locks(stp->st_vfs_file, sop)) | |
2954 | goto out; | |
2955 | /* Note: so_perclient unused for lockowners, | |
2956 | * so it's OK to fool with here. */ | |
2957 | list_add(&sop->so_perclient, &matches); | |
2958 | } | |
2959 | } | |
2960 | } | |
2961 | /* Clients probably won't expect us to return with some (but not all) | |
2962 | * of the lockowner state released; so don't release any until all | |
2963 | * have been checked. */ | |
2964 | status = nfs_ok; | |
2965 | while (!list_empty(&matches)) { | |
2966 | sop = list_entry(matches.next, struct nfs4_stateowner, | |
2967 | so_perclient); | |
2968 | /* unhash_stateowner deletes so_perclient only | |
2969 | * for openowners. */ | |
2970 | list_del(&sop->so_perclient); | |
2971 | release_stateowner(sop); | |
2972 | } | |
2973 | out: | |
2974 | nfs4_unlock_state(); | |
2975 | return status; | |
2976 | } | |
2977 | ||
2978 | static inline struct nfs4_client_reclaim * | |
2979 | alloc_reclaim(void) | |
2980 | { | |
2981 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); | |
2982 | } | |
2983 | ||
2984 | int | |
2985 | nfs4_has_reclaimed_state(const char *name) | |
2986 | { | |
2987 | unsigned int strhashval = clientstr_hashval(name); | |
2988 | struct nfs4_client *clp; | |
2989 | ||
2990 | clp = find_confirmed_client_by_str(name, strhashval); | |
2991 | return clp ? 1 : 0; | |
2992 | } | |
2993 | ||
2994 | /* | |
2995 | * failure => all reset bets are off, nfserr_no_grace... | |
2996 | */ | |
2997 | int | |
2998 | nfs4_client_to_reclaim(const char *name) | |
2999 | { | |
3000 | unsigned int strhashval; | |
3001 | struct nfs4_client_reclaim *crp = NULL; | |
3002 | ||
3003 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); | |
3004 | crp = alloc_reclaim(); | |
3005 | if (!crp) | |
3006 | return 0; | |
3007 | strhashval = clientstr_hashval(name); | |
3008 | INIT_LIST_HEAD(&crp->cr_strhash); | |
3009 | list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); | |
3010 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); | |
3011 | reclaim_str_hashtbl_size++; | |
3012 | return 1; | |
3013 | } | |
3014 | ||
3015 | static void | |
3016 | nfs4_release_reclaim(void) | |
3017 | { | |
3018 | struct nfs4_client_reclaim *crp = NULL; | |
3019 | int i; | |
3020 | ||
3021 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { | |
3022 | while (!list_empty(&reclaim_str_hashtbl[i])) { | |
3023 | crp = list_entry(reclaim_str_hashtbl[i].next, | |
3024 | struct nfs4_client_reclaim, cr_strhash); | |
3025 | list_del(&crp->cr_strhash); | |
3026 | kfree(crp); | |
3027 | reclaim_str_hashtbl_size--; | |
3028 | } | |
3029 | } | |
3030 | BUG_ON(reclaim_str_hashtbl_size); | |
3031 | } | |
3032 | ||
3033 | /* | |
3034 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | |
3035 | static struct nfs4_client_reclaim * | |
3036 | nfs4_find_reclaim_client(clientid_t *clid) | |
3037 | { | |
3038 | unsigned int strhashval; | |
3039 | struct nfs4_client *clp; | |
3040 | struct nfs4_client_reclaim *crp = NULL; | |
3041 | ||
3042 | ||
3043 | /* find clientid in conf_id_hashtbl */ | |
3044 | clp = find_confirmed_client(clid); | |
3045 | if (clp == NULL) | |
3046 | return NULL; | |
3047 | ||
3048 | dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", | |
3049 | clp->cl_name.len, clp->cl_name.data, | |
3050 | clp->cl_recdir); | |
3051 | ||
3052 | /* find clp->cl_name in reclaim_str_hashtbl */ | |
3053 | strhashval = clientstr_hashval(clp->cl_recdir); | |
3054 | list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { | |
3055 | if (same_name(crp->cr_recdir, clp->cl_recdir)) { | |
3056 | return crp; | |
3057 | } | |
3058 | } | |
3059 | return NULL; | |
3060 | } | |
3061 | ||
3062 | /* | |
3063 | * Called from OPEN. Look for clientid in reclaim list. | |
3064 | */ | |
3065 | __be32 | |
3066 | nfs4_check_open_reclaim(clientid_t *clid) | |
3067 | { | |
3068 | return nfs4_find_reclaim_client(clid) ? nfs_ok : nfserr_reclaim_bad; | |
3069 | } | |
3070 | ||
3071 | /* initialization to perform at module load time: */ | |
3072 | ||
3073 | int | |
3074 | nfs4_state_init(void) | |
3075 | { | |
3076 | int i, status; | |
3077 | ||
3078 | status = nfsd4_init_slabs(); | |
3079 | if (status) | |
3080 | return status; | |
3081 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { | |
3082 | INIT_LIST_HEAD(&conf_id_hashtbl[i]); | |
3083 | INIT_LIST_HEAD(&conf_str_hashtbl[i]); | |
3084 | INIT_LIST_HEAD(&unconf_str_hashtbl[i]); | |
3085 | INIT_LIST_HEAD(&unconf_id_hashtbl[i]); | |
3086 | } | |
3087 | for (i = 0; i < FILE_HASH_SIZE; i++) { | |
3088 | INIT_LIST_HEAD(&file_hashtbl[i]); | |
3089 | } | |
3090 | for (i = 0; i < OWNER_HASH_SIZE; i++) { | |
3091 | INIT_LIST_HEAD(&ownerstr_hashtbl[i]); | |
3092 | INIT_LIST_HEAD(&ownerid_hashtbl[i]); | |
3093 | } | |
3094 | for (i = 0; i < STATEID_HASH_SIZE; i++) { | |
3095 | INIT_LIST_HEAD(&stateid_hashtbl[i]); | |
3096 | INIT_LIST_HEAD(&lockstateid_hashtbl[i]); | |
3097 | } | |
3098 | for (i = 0; i < LOCK_HASH_SIZE; i++) { | |
3099 | INIT_LIST_HEAD(&lock_ownerid_hashtbl[i]); | |
3100 | INIT_LIST_HEAD(&lock_ownerstr_hashtbl[i]); | |
3101 | } | |
3102 | memset(&onestateid, ~0, sizeof(stateid_t)); | |
3103 | INIT_LIST_HEAD(&close_lru); | |
3104 | INIT_LIST_HEAD(&client_lru); | |
3105 | INIT_LIST_HEAD(&del_recall_lru); | |
3106 | for (i = 0; i < CLIENT_HASH_SIZE; i++) | |
3107 | INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); | |
3108 | reclaim_str_hashtbl_size = 0; | |
3109 | return 0; | |
3110 | } | |
3111 | ||
3112 | static void | |
3113 | nfsd4_load_reboot_recovery_data(void) | |
3114 | { | |
3115 | int status; | |
3116 | ||
3117 | nfs4_lock_state(); | |
3118 | nfsd4_init_recdir(user_recovery_dirname); | |
3119 | status = nfsd4_recdir_load(); | |
3120 | nfs4_unlock_state(); | |
3121 | if (status) | |
3122 | printk("NFSD: Failure reading reboot recovery data\n"); | |
3123 | } | |
3124 | ||
3125 | unsigned long | |
3126 | get_nfs4_grace_period(void) | |
3127 | { | |
3128 | return max(user_lease_time, lease_time) * HZ; | |
3129 | } | |
3130 | ||
3131 | /* | |
3132 | * Since the lifetime of a delegation isn't limited to that of an open, a | |
3133 | * client may quite reasonably hang on to a delegation as long as it has | |
3134 | * the inode cached. This becomes an obvious problem the first time a | |
3135 | * client's inode cache approaches the size of the server's total memory. | |
3136 | * | |
3137 | * For now we avoid this problem by imposing a hard limit on the number | |
3138 | * of delegations, which varies according to the server's memory size. | |
3139 | */ | |
3140 | static void | |
3141 | set_max_delegations(void) | |
3142 | { | |
3143 | /* | |
3144 | * Allow at most 4 delegations per megabyte of RAM. Quick | |
3145 | * estimates suggest that in the worst case (where every delegation | |
3146 | * is for a different inode), a delegation could take about 1.5K, | |
3147 | * giving a worst case usage of about 6% of memory. | |
3148 | */ | |
3149 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); | |
3150 | } | |
3151 | ||
3152 | /* initialization to perform when the nfsd service is started: */ | |
3153 | ||
3154 | static void | |
3155 | __nfs4_state_start(void) | |
3156 | { | |
3157 | unsigned long grace_time; | |
3158 | ||
3159 | boot_time = get_seconds(); | |
3160 | grace_time = get_nfs_grace_period(); | |
3161 | lease_time = user_lease_time; | |
3162 | in_grace = 1; | |
3163 | printk(KERN_INFO "NFSD: starting %ld-second grace period\n", | |
3164 | grace_time/HZ); | |
3165 | laundry_wq = create_singlethread_workqueue("nfsd4"); | |
3166 | queue_delayed_work(laundry_wq, &laundromat_work, grace_time); | |
3167 | set_max_delegations(); | |
3168 | } | |
3169 | ||
3170 | void | |
3171 | nfs4_state_start(void) | |
3172 | { | |
3173 | if (nfs4_init) | |
3174 | return; | |
3175 | nfsd4_load_reboot_recovery_data(); | |
3176 | __nfs4_state_start(); | |
3177 | nfs4_init = 1; | |
3178 | return; | |
3179 | } | |
3180 | ||
3181 | int | |
3182 | nfs4_in_grace(void) | |
3183 | { | |
3184 | return in_grace; | |
3185 | } | |
3186 | ||
3187 | time_t | |
3188 | nfs4_lease_time(void) | |
3189 | { | |
3190 | return lease_time; | |
3191 | } | |
3192 | ||
3193 | static void | |
3194 | __nfs4_state_shutdown(void) | |
3195 | { | |
3196 | int i; | |
3197 | struct nfs4_client *clp = NULL; | |
3198 | struct nfs4_delegation *dp = NULL; | |
3199 | struct list_head *pos, *next, reaplist; | |
3200 | ||
3201 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { | |
3202 | while (!list_empty(&conf_id_hashtbl[i])) { | |
3203 | clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
3204 | expire_client(clp); | |
3205 | } | |
3206 | while (!list_empty(&unconf_str_hashtbl[i])) { | |
3207 | clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); | |
3208 | expire_client(clp); | |
3209 | } | |
3210 | } | |
3211 | INIT_LIST_HEAD(&reaplist); | |
3212 | spin_lock(&recall_lock); | |
3213 | list_for_each_safe(pos, next, &del_recall_lru) { | |
3214 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
3215 | list_move(&dp->dl_recall_lru, &reaplist); | |
3216 | } | |
3217 | spin_unlock(&recall_lock); | |
3218 | list_for_each_safe(pos, next, &reaplist) { | |
3219 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
3220 | list_del_init(&dp->dl_recall_lru); | |
3221 | unhash_delegation(dp); | |
3222 | } | |
3223 | ||
3224 | nfsd4_shutdown_recdir(); | |
3225 | nfs4_init = 0; | |
3226 | } | |
3227 | ||
3228 | void | |
3229 | nfs4_state_shutdown(void) | |
3230 | { | |
3231 | cancel_rearming_delayed_workqueue(laundry_wq, &laundromat_work); | |
3232 | destroy_workqueue(laundry_wq); | |
3233 | nfs4_lock_state(); | |
3234 | nfs4_release_reclaim(); | |
3235 | __nfs4_state_shutdown(); | |
3236 | nfs4_unlock_state(); | |
3237 | } | |
3238 | ||
3239 | static void | |
3240 | nfs4_set_recdir(char *recdir) | |
3241 | { | |
3242 | nfs4_lock_state(); | |
3243 | strcpy(user_recovery_dirname, recdir); | |
3244 | nfs4_unlock_state(); | |
3245 | } | |
3246 | ||
3247 | /* | |
3248 | * Change the NFSv4 recovery directory to recdir. | |
3249 | */ | |
3250 | int | |
3251 | nfs4_reset_recoverydir(char *recdir) | |
3252 | { | |
3253 | int status; | |
3254 | struct nameidata nd; | |
3255 | ||
3256 | status = path_lookup(recdir, LOOKUP_FOLLOW, &nd); | |
3257 | if (status) | |
3258 | return status; | |
3259 | status = -ENOTDIR; | |
3260 | if (S_ISDIR(nd.dentry->d_inode->i_mode)) { | |
3261 | nfs4_set_recdir(recdir); | |
3262 | status = 0; | |
3263 | } | |
3264 | path_release(&nd); | |
3265 | return status; | |
3266 | } | |
3267 | ||
3268 | /* | |
3269 | * Called when leasetime is changed. | |
3270 | * | |
3271 | * The only way the protocol gives us to handle on-the-fly lease changes is to | |
3272 | * simulate a reboot. Instead of doing that, we just wait till the next time | |
3273 | * we start to register any changes in lease time. If the administrator | |
3274 | * really wants to change the lease time *now*, they can go ahead and bring | |
3275 | * nfsd down and then back up again after changing the lease time. | |
3276 | */ | |
3277 | void | |
3278 | nfs4_reset_lease(time_t leasetime) | |
3279 | { | |
3280 | lock_kernel(); | |
3281 | user_lease_time = leasetime; | |
3282 | unlock_kernel(); | |
3283 | } |