Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * fs/nfs/nfs4state.c | |
3 | * | |
4 | * Client-side XDR for NFSv4. | |
5 | * | |
6 | * Copyright (c) 2002 The Regents of the University of Michigan. | |
7 | * All rights reserved. | |
8 | * | |
9 | * Kendrick Smith <kmsmith@umich.edu> | |
10 | * | |
11 | * Redistribution and use in source and binary forms, with or without | |
12 | * modification, are permitted provided that the following conditions | |
13 | * are met: | |
14 | * | |
15 | * 1. Redistributions of source code must retain the above copyright | |
16 | * notice, this list of conditions and the following disclaimer. | |
17 | * 2. Redistributions in binary form must reproduce the above copyright | |
18 | * notice, this list of conditions and the following disclaimer in the | |
19 | * documentation and/or other materials provided with the distribution. | |
20 | * 3. Neither the name of the University nor the names of its | |
21 | * contributors may be used to endorse or promote products derived | |
22 | * from this software without specific prior written permission. | |
23 | * | |
24 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
25 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
26 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
27 | * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
28 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
29 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
30 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR | |
31 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
32 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
33 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
34 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
35 | * | |
36 | * Implementation of the NFSv4 state model. For the time being, | |
37 | * this is minimal, but will be made much more complex in a | |
38 | * subsequent patch. | |
39 | */ | |
40 | ||
6f43ddcc | 41 | #include <linux/kernel.h> |
1da177e4 LT |
42 | #include <linux/slab.h> |
43 | #include <linux/smp_lock.h> | |
44 | #include <linux/nfs_fs.h> | |
45 | #include <linux/nfs_idmap.h> | |
5043e900 TM |
46 | #include <linux/kthread.h> |
47 | #include <linux/module.h> | |
9f958ab8 | 48 | #include <linux/random.h> |
1da177e4 LT |
49 | #include <linux/workqueue.h> |
50 | #include <linux/bitops.h> | |
51 | ||
4ce79717 | 52 | #include "nfs4_fs.h" |
1da177e4 LT |
53 | #include "callback.h" |
54 | #include "delegation.h" | |
24c8dbbb | 55 | #include "internal.h" |
1da177e4 LT |
56 | |
57 | #define OPENOWNER_POOL_SIZE 8 | |
58 | ||
4ce79717 | 59 | const nfs4_stateid zero_stateid; |
1da177e4 LT |
60 | |
61 | static LIST_HEAD(nfs4_clientid_list); | |
62 | ||
591d71cb | 63 | int nfs4_init_clientid(struct nfs_client *clp, struct rpc_cred *cred) |
1da177e4 | 64 | { |
f738f517 CL |
65 | unsigned short port; |
66 | int status; | |
67 | ||
68 | port = nfs_callback_tcpport; | |
69 | if (clp->cl_addr.ss_family == AF_INET6) | |
70 | port = nfs_callback_tcpport6; | |
71 | ||
72 | status = nfs4_proc_setclientid(clp, NFS4_CALLBACK, port, cred); | |
1da177e4 | 73 | if (status == 0) |
286d7d6a | 74 | status = nfs4_proc_setclientid_confirm(clp, cred); |
1da177e4 LT |
75 | if (status == 0) |
76 | nfs4_schedule_state_renewal(clp); | |
77 | return status; | |
78 | } | |
79 | ||
a7b72103 | 80 | struct rpc_cred *nfs4_get_machine_cred_locked(struct nfs_client *clp) |
a2b2bb88 TM |
81 | { |
82 | struct rpc_cred *cred = NULL; | |
83 | ||
a2b2bb88 TM |
84 | if (clp->cl_machine_cred != NULL) |
85 | cred = get_rpccred(clp->cl_machine_cred); | |
a2b2bb88 TM |
86 | return cred; |
87 | } | |
88 | ||
89 | static void nfs4_clear_machine_cred(struct nfs_client *clp) | |
90 | { | |
91 | struct rpc_cred *cred; | |
92 | ||
93 | spin_lock(&clp->cl_lock); | |
94 | cred = clp->cl_machine_cred; | |
95 | clp->cl_machine_cred = NULL; | |
96 | spin_unlock(&clp->cl_lock); | |
97 | if (cred != NULL) | |
98 | put_rpccred(cred); | |
99 | } | |
100 | ||
6dc9d57a | 101 | struct rpc_cred *nfs4_get_renew_cred_locked(struct nfs_client *clp) |
b4454fe1 TM |
102 | { |
103 | struct nfs4_state_owner *sp; | |
9f958ab8 | 104 | struct rb_node *pos; |
b4454fe1 TM |
105 | struct rpc_cred *cred = NULL; |
106 | ||
9f958ab8 TM |
107 | for (pos = rb_first(&clp->cl_state_owners); pos != NULL; pos = rb_next(pos)) { |
108 | sp = rb_entry(pos, struct nfs4_state_owner, so_client_node); | |
b4454fe1 TM |
109 | if (list_empty(&sp->so_states)) |
110 | continue; | |
111 | cred = get_rpccred(sp->so_cred); | |
112 | break; | |
113 | } | |
114 | return cred; | |
115 | } | |
116 | ||
b4b82607 AA |
117 | #if defined(CONFIG_NFS_V4_1) |
118 | ||
9430fb6b RL |
119 | static int nfs41_setup_state_renewal(struct nfs_client *clp) |
120 | { | |
121 | int status; | |
122 | struct nfs_fsinfo fsinfo; | |
123 | ||
124 | status = nfs4_proc_get_lease_time(clp, &fsinfo); | |
125 | if (status == 0) { | |
126 | /* Update lease time and schedule renewal */ | |
127 | spin_lock(&clp->cl_lock); | |
128 | clp->cl_lease_time = fsinfo.lease_time * HZ; | |
129 | clp->cl_last_renewal = jiffies; | |
130 | spin_unlock(&clp->cl_lock); | |
131 | ||
132 | nfs4_schedule_state_renewal(clp); | |
133 | } | |
134 | ||
135 | return status; | |
136 | } | |
137 | ||
4d643d1d AA |
138 | int nfs41_init_clientid(struct nfs_client *clp, struct rpc_cred *cred) |
139 | { | |
140 | int status; | |
141 | ||
142 | status = nfs4_proc_exchange_id(clp, cred); | |
9430fb6b RL |
143 | if (status != 0) |
144 | goto out; | |
145 | status = nfs4_proc_create_session(clp); | |
146 | if (status != 0) | |
147 | goto out; | |
148 | nfs41_setup_state_renewal(clp); | |
149 | nfs_mark_client_ready(clp, NFS_CS_READY); | |
150 | out: | |
4d643d1d AA |
151 | return status; |
152 | } | |
153 | ||
b4b82607 AA |
154 | struct rpc_cred *nfs4_get_exchange_id_cred(struct nfs_client *clp) |
155 | { | |
156 | struct rpc_cred *cred; | |
157 | ||
158 | spin_lock(&clp->cl_lock); | |
159 | cred = nfs4_get_machine_cred_locked(clp); | |
160 | spin_unlock(&clp->cl_lock); | |
161 | return cred; | |
162 | } | |
163 | ||
164 | #endif /* CONFIG_NFS_V4_1 */ | |
165 | ||
a7b72103 | 166 | struct rpc_cred *nfs4_get_setclientid_cred(struct nfs_client *clp) |
286d7d6a TM |
167 | { |
168 | struct nfs4_state_owner *sp; | |
9f958ab8 | 169 | struct rb_node *pos; |
a2b2bb88 | 170 | struct rpc_cred *cred; |
286d7d6a | 171 | |
6dc9d57a TM |
172 | spin_lock(&clp->cl_lock); |
173 | cred = nfs4_get_machine_cred_locked(clp); | |
a2b2bb88 TM |
174 | if (cred != NULL) |
175 | goto out; | |
9f958ab8 TM |
176 | pos = rb_first(&clp->cl_state_owners); |
177 | if (pos != NULL) { | |
178 | sp = rb_entry(pos, struct nfs4_state_owner, so_client_node); | |
a2b2bb88 | 179 | cred = get_rpccred(sp->so_cred); |
286d7d6a | 180 | } |
a2b2bb88 | 181 | out: |
6dc9d57a | 182 | spin_unlock(&clp->cl_lock); |
a2b2bb88 | 183 | return cred; |
286d7d6a TM |
184 | } |
185 | ||
9f958ab8 TM |
186 | static void nfs_alloc_unique_id(struct rb_root *root, struct nfs_unique_id *new, |
187 | __u64 minval, int maxbits) | |
188 | { | |
189 | struct rb_node **p, *parent; | |
190 | struct nfs_unique_id *pos; | |
191 | __u64 mask = ~0ULL; | |
192 | ||
193 | if (maxbits < 64) | |
194 | mask = (1ULL << maxbits) - 1ULL; | |
195 | ||
196 | /* Ensure distribution is more or less flat */ | |
197 | get_random_bytes(&new->id, sizeof(new->id)); | |
198 | new->id &= mask; | |
199 | if (new->id < minval) | |
200 | new->id += minval; | |
201 | retry: | |
202 | p = &root->rb_node; | |
203 | parent = NULL; | |
204 | ||
205 | while (*p != NULL) { | |
206 | parent = *p; | |
207 | pos = rb_entry(parent, struct nfs_unique_id, rb_node); | |
208 | ||
209 | if (new->id < pos->id) | |
210 | p = &(*p)->rb_left; | |
211 | else if (new->id > pos->id) | |
212 | p = &(*p)->rb_right; | |
213 | else | |
214 | goto id_exists; | |
215 | } | |
216 | rb_link_node(&new->rb_node, parent, p); | |
217 | rb_insert_color(&new->rb_node, root); | |
218 | return; | |
219 | id_exists: | |
220 | for (;;) { | |
221 | new->id++; | |
222 | if (new->id < minval || (new->id & mask) != new->id) { | |
223 | new->id = minval; | |
224 | break; | |
225 | } | |
226 | parent = rb_next(parent); | |
227 | if (parent == NULL) | |
228 | break; | |
229 | pos = rb_entry(parent, struct nfs_unique_id, rb_node); | |
230 | if (new->id < pos->id) | |
231 | break; | |
232 | } | |
233 | goto retry; | |
234 | } | |
235 | ||
236 | static void nfs_free_unique_id(struct rb_root *root, struct nfs_unique_id *id) | |
237 | { | |
238 | rb_erase(&id->rb_node, root); | |
239 | } | |
240 | ||
1da177e4 | 241 | static struct nfs4_state_owner * |
6f2e64d3 | 242 | nfs4_find_state_owner(struct nfs_server *server, struct rpc_cred *cred) |
1da177e4 | 243 | { |
6f2e64d3 | 244 | struct nfs_client *clp = server->nfs_client; |
9f958ab8 TM |
245 | struct rb_node **p = &clp->cl_state_owners.rb_node, |
246 | *parent = NULL; | |
1da177e4 LT |
247 | struct nfs4_state_owner *sp, *res = NULL; |
248 | ||
9f958ab8 TM |
249 | while (*p != NULL) { |
250 | parent = *p; | |
251 | sp = rb_entry(parent, struct nfs4_state_owner, so_client_node); | |
252 | ||
6f2e64d3 TM |
253 | if (server < sp->so_server) { |
254 | p = &parent->rb_left; | |
255 | continue; | |
256 | } | |
257 | if (server > sp->so_server) { | |
258 | p = &parent->rb_right; | |
259 | continue; | |
260 | } | |
9f958ab8 TM |
261 | if (cred < sp->so_cred) |
262 | p = &parent->rb_left; | |
263 | else if (cred > sp->so_cred) | |
264 | p = &parent->rb_right; | |
265 | else { | |
266 | atomic_inc(&sp->so_count); | |
267 | res = sp; | |
268 | break; | |
269 | } | |
1da177e4 LT |
270 | } |
271 | return res; | |
272 | } | |
273 | ||
9f958ab8 TM |
274 | static struct nfs4_state_owner * |
275 | nfs4_insert_state_owner(struct nfs_client *clp, struct nfs4_state_owner *new) | |
276 | { | |
277 | struct rb_node **p = &clp->cl_state_owners.rb_node, | |
278 | *parent = NULL; | |
279 | struct nfs4_state_owner *sp; | |
280 | ||
281 | while (*p != NULL) { | |
282 | parent = *p; | |
283 | sp = rb_entry(parent, struct nfs4_state_owner, so_client_node); | |
284 | ||
6f2e64d3 TM |
285 | if (new->so_server < sp->so_server) { |
286 | p = &parent->rb_left; | |
287 | continue; | |
288 | } | |
289 | if (new->so_server > sp->so_server) { | |
290 | p = &parent->rb_right; | |
291 | continue; | |
292 | } | |
9f958ab8 TM |
293 | if (new->so_cred < sp->so_cred) |
294 | p = &parent->rb_left; | |
295 | else if (new->so_cred > sp->so_cred) | |
296 | p = &parent->rb_right; | |
297 | else { | |
298 | atomic_inc(&sp->so_count); | |
299 | return sp; | |
300 | } | |
301 | } | |
302 | nfs_alloc_unique_id(&clp->cl_openowner_id, &new->so_owner_id, 1, 64); | |
303 | rb_link_node(&new->so_client_node, parent, p); | |
304 | rb_insert_color(&new->so_client_node, &clp->cl_state_owners); | |
305 | return new; | |
306 | } | |
307 | ||
308 | static void | |
309 | nfs4_remove_state_owner(struct nfs_client *clp, struct nfs4_state_owner *sp) | |
310 | { | |
311 | if (!RB_EMPTY_NODE(&sp->so_client_node)) | |
312 | rb_erase(&sp->so_client_node, &clp->cl_state_owners); | |
313 | nfs_free_unique_id(&clp->cl_openowner_id, &sp->so_owner_id); | |
314 | } | |
315 | ||
1da177e4 LT |
316 | /* |
317 | * nfs4_alloc_state_owner(): this is called on the OPEN or CREATE path to | |
318 | * create a new state_owner. | |
319 | * | |
320 | */ | |
321 | static struct nfs4_state_owner * | |
322 | nfs4_alloc_state_owner(void) | |
323 | { | |
324 | struct nfs4_state_owner *sp; | |
325 | ||
cee54fc9 | 326 | sp = kzalloc(sizeof(*sp),GFP_KERNEL); |
1da177e4 LT |
327 | if (!sp) |
328 | return NULL; | |
ec073428 | 329 | spin_lock_init(&sp->so_lock); |
1da177e4 LT |
330 | INIT_LIST_HEAD(&sp->so_states); |
331 | INIT_LIST_HEAD(&sp->so_delegations); | |
cee54fc9 TM |
332 | rpc_init_wait_queue(&sp->so_sequence.wait, "Seqid_waitqueue"); |
333 | sp->so_seqid.sequence = &sp->so_sequence; | |
334 | spin_lock_init(&sp->so_sequence.lock); | |
335 | INIT_LIST_HEAD(&sp->so_sequence.list); | |
1da177e4 LT |
336 | atomic_set(&sp->so_count, 1); |
337 | return sp; | |
338 | } | |
339 | ||
1d2e88e7 | 340 | static void |
1da177e4 LT |
341 | nfs4_drop_state_owner(struct nfs4_state_owner *sp) |
342 | { | |
9f958ab8 TM |
343 | if (!RB_EMPTY_NODE(&sp->so_client_node)) { |
344 | struct nfs_client *clp = sp->so_client; | |
345 | ||
346 | spin_lock(&clp->cl_lock); | |
347 | rb_erase(&sp->so_client_node, &clp->cl_state_owners); | |
348 | RB_CLEAR_NODE(&sp->so_client_node); | |
349 | spin_unlock(&clp->cl_lock); | |
350 | } | |
1da177e4 LT |
351 | } |
352 | ||
1da177e4 LT |
353 | struct nfs4_state_owner *nfs4_get_state_owner(struct nfs_server *server, struct rpc_cred *cred) |
354 | { | |
7539bbab | 355 | struct nfs_client *clp = server->nfs_client; |
1da177e4 LT |
356 | struct nfs4_state_owner *sp, *new; |
357 | ||
1da177e4 | 358 | spin_lock(&clp->cl_lock); |
6f2e64d3 | 359 | sp = nfs4_find_state_owner(server, cred); |
1da177e4 | 360 | spin_unlock(&clp->cl_lock); |
1da177e4 LT |
361 | if (sp != NULL) |
362 | return sp; | |
9f958ab8 TM |
363 | new = nfs4_alloc_state_owner(); |
364 | if (new == NULL) | |
365 | return NULL; | |
366 | new->so_client = clp; | |
6f2e64d3 | 367 | new->so_server = server; |
9f958ab8 TM |
368 | new->so_cred = cred; |
369 | spin_lock(&clp->cl_lock); | |
370 | sp = nfs4_insert_state_owner(clp, new); | |
371 | spin_unlock(&clp->cl_lock); | |
372 | if (sp == new) | |
373 | get_rpccred(cred); | |
f6a1cc89 TM |
374 | else { |
375 | rpc_destroy_wait_queue(&new->so_sequence.wait); | |
9f958ab8 | 376 | kfree(new); |
f6a1cc89 | 377 | } |
9f958ab8 | 378 | return sp; |
1da177e4 LT |
379 | } |
380 | ||
1da177e4 LT |
381 | void nfs4_put_state_owner(struct nfs4_state_owner *sp) |
382 | { | |
adfa6f98 | 383 | struct nfs_client *clp = sp->so_client; |
1da177e4 LT |
384 | struct rpc_cred *cred = sp->so_cred; |
385 | ||
386 | if (!atomic_dec_and_lock(&sp->so_count, &clp->cl_lock)) | |
387 | return; | |
9f958ab8 | 388 | nfs4_remove_state_owner(clp, sp); |
1da177e4 | 389 | spin_unlock(&clp->cl_lock); |
f6a1cc89 | 390 | rpc_destroy_wait_queue(&sp->so_sequence.wait); |
1da177e4 LT |
391 | put_rpccred(cred); |
392 | kfree(sp); | |
393 | } | |
394 | ||
395 | static struct nfs4_state * | |
396 | nfs4_alloc_open_state(void) | |
397 | { | |
398 | struct nfs4_state *state; | |
399 | ||
e7616923 | 400 | state = kzalloc(sizeof(*state), GFP_KERNEL); |
1da177e4 LT |
401 | if (!state) |
402 | return NULL; | |
1da177e4 LT |
403 | atomic_set(&state->count, 1); |
404 | INIT_LIST_HEAD(&state->lock_states); | |
8d0a8a9d | 405 | spin_lock_init(&state->state_lock); |
8bda4e4c | 406 | seqlock_init(&state->seqlock); |
1da177e4 LT |
407 | return state; |
408 | } | |
409 | ||
4cecb76f | 410 | void |
dc0b027d | 411 | nfs4_state_set_mode_locked(struct nfs4_state *state, fmode_t fmode) |
4cecb76f | 412 | { |
dc0b027d | 413 | if (state->state == fmode) |
4cecb76f TM |
414 | return; |
415 | /* NB! List reordering - see the reclaim code for why. */ | |
dc0b027d TM |
416 | if ((fmode & FMODE_WRITE) != (state->state & FMODE_WRITE)) { |
417 | if (fmode & FMODE_WRITE) | |
4cecb76f TM |
418 | list_move(&state->open_states, &state->owner->so_states); |
419 | else | |
420 | list_move_tail(&state->open_states, &state->owner->so_states); | |
421 | } | |
dc0b027d | 422 | state->state = fmode; |
4cecb76f TM |
423 | } |
424 | ||
1da177e4 LT |
425 | static struct nfs4_state * |
426 | __nfs4_find_state_byowner(struct inode *inode, struct nfs4_state_owner *owner) | |
427 | { | |
428 | struct nfs_inode *nfsi = NFS_I(inode); | |
429 | struct nfs4_state *state; | |
430 | ||
431 | list_for_each_entry(state, &nfsi->open_states, inode_states) { | |
1c816efa | 432 | if (state->owner != owner) |
1da177e4 | 433 | continue; |
1c816efa | 434 | if (atomic_inc_not_zero(&state->count)) |
1da177e4 | 435 | return state; |
1da177e4 LT |
436 | } |
437 | return NULL; | |
438 | } | |
439 | ||
1da177e4 LT |
440 | static void |
441 | nfs4_free_open_state(struct nfs4_state *state) | |
442 | { | |
443 | kfree(state); | |
444 | } | |
445 | ||
446 | struct nfs4_state * | |
447 | nfs4_get_open_state(struct inode *inode, struct nfs4_state_owner *owner) | |
448 | { | |
449 | struct nfs4_state *state, *new; | |
450 | struct nfs_inode *nfsi = NFS_I(inode); | |
451 | ||
452 | spin_lock(&inode->i_lock); | |
453 | state = __nfs4_find_state_byowner(inode, owner); | |
454 | spin_unlock(&inode->i_lock); | |
455 | if (state) | |
456 | goto out; | |
457 | new = nfs4_alloc_open_state(); | |
ec073428 | 458 | spin_lock(&owner->so_lock); |
1da177e4 LT |
459 | spin_lock(&inode->i_lock); |
460 | state = __nfs4_find_state_byowner(inode, owner); | |
461 | if (state == NULL && new != NULL) { | |
462 | state = new; | |
1da177e4 LT |
463 | state->owner = owner; |
464 | atomic_inc(&owner->so_count); | |
465 | list_add(&state->inode_states, &nfsi->open_states); | |
466 | state->inode = igrab(inode); | |
467 | spin_unlock(&inode->i_lock); | |
ec073428 TM |
468 | /* Note: The reclaim code dictates that we add stateless |
469 | * and read-only stateids to the end of the list */ | |
470 | list_add_tail(&state->open_states, &owner->so_states); | |
471 | spin_unlock(&owner->so_lock); | |
1da177e4 LT |
472 | } else { |
473 | spin_unlock(&inode->i_lock); | |
ec073428 | 474 | spin_unlock(&owner->so_lock); |
1da177e4 LT |
475 | if (new) |
476 | nfs4_free_open_state(new); | |
477 | } | |
478 | out: | |
479 | return state; | |
480 | } | |
481 | ||
1da177e4 LT |
482 | void nfs4_put_open_state(struct nfs4_state *state) |
483 | { | |
484 | struct inode *inode = state->inode; | |
485 | struct nfs4_state_owner *owner = state->owner; | |
486 | ||
ec073428 | 487 | if (!atomic_dec_and_lock(&state->count, &owner->so_lock)) |
1da177e4 | 488 | return; |
ec073428 | 489 | spin_lock(&inode->i_lock); |
ba683031 | 490 | list_del(&state->inode_states); |
1da177e4 | 491 | list_del(&state->open_states); |
ec073428 TM |
492 | spin_unlock(&inode->i_lock); |
493 | spin_unlock(&owner->so_lock); | |
1da177e4 | 494 | iput(inode); |
1da177e4 LT |
495 | nfs4_free_open_state(state); |
496 | nfs4_put_state_owner(owner); | |
497 | } | |
498 | ||
499 | /* | |
83c9d41e | 500 | * Close the current file. |
1da177e4 | 501 | */ |
dc0b027d | 502 | static void __nfs4_close(struct path *path, struct nfs4_state *state, fmode_t fmode, int wait) |
1da177e4 | 503 | { |
1da177e4 | 504 | struct nfs4_state_owner *owner = state->owner; |
003707c7 | 505 | int call_close = 0; |
dc0b027d | 506 | fmode_t newstate; |
1da177e4 LT |
507 | |
508 | atomic_inc(&owner->so_count); | |
1da177e4 | 509 | /* Protect against nfs4_find_state() */ |
ec073428 | 510 | spin_lock(&owner->so_lock); |
dc0b027d | 511 | switch (fmode & (FMODE_READ | FMODE_WRITE)) { |
e7616923 TM |
512 | case FMODE_READ: |
513 | state->n_rdonly--; | |
514 | break; | |
515 | case FMODE_WRITE: | |
516 | state->n_wronly--; | |
517 | break; | |
518 | case FMODE_READ|FMODE_WRITE: | |
519 | state->n_rdwr--; | |
520 | } | |
003707c7 | 521 | newstate = FMODE_READ|FMODE_WRITE; |
e7616923 | 522 | if (state->n_rdwr == 0) { |
003707c7 | 523 | if (state->n_rdonly == 0) { |
e7616923 | 524 | newstate &= ~FMODE_READ; |
003707c7 TM |
525 | call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags); |
526 | call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); | |
527 | } | |
528 | if (state->n_wronly == 0) { | |
e7616923 | 529 | newstate &= ~FMODE_WRITE; |
003707c7 TM |
530 | call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags); |
531 | call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); | |
532 | } | |
533 | if (newstate == 0) | |
534 | clear_bit(NFS_DELEGATED_STATE, &state->flags); | |
e7616923 | 535 | } |
003707c7 | 536 | nfs4_state_set_mode_locked(state, newstate); |
ec073428 | 537 | spin_unlock(&owner->so_lock); |
4cecb76f | 538 | |
003707c7 | 539 | if (!call_close) { |
b39e625b TM |
540 | nfs4_put_open_state(state); |
541 | nfs4_put_state_owner(owner); | |
542 | } else | |
a49c3c77 TM |
543 | nfs4_do_close(path, state, wait); |
544 | } | |
545 | ||
dc0b027d | 546 | void nfs4_close_state(struct path *path, struct nfs4_state *state, fmode_t fmode) |
a49c3c77 | 547 | { |
dc0b027d | 548 | __nfs4_close(path, state, fmode, 0); |
a49c3c77 TM |
549 | } |
550 | ||
dc0b027d | 551 | void nfs4_close_sync(struct path *path, struct nfs4_state *state, fmode_t fmode) |
a49c3c77 | 552 | { |
dc0b027d | 553 | __nfs4_close(path, state, fmode, 1); |
1da177e4 LT |
554 | } |
555 | ||
556 | /* | |
557 | * Search the state->lock_states for an existing lock_owner | |
558 | * that is compatible with current->files | |
559 | */ | |
560 | static struct nfs4_lock_state * | |
561 | __nfs4_find_lock_state(struct nfs4_state *state, fl_owner_t fl_owner) | |
562 | { | |
563 | struct nfs4_lock_state *pos; | |
564 | list_for_each_entry(pos, &state->lock_states, ls_locks) { | |
565 | if (pos->ls_owner != fl_owner) | |
566 | continue; | |
567 | atomic_inc(&pos->ls_count); | |
568 | return pos; | |
569 | } | |
570 | return NULL; | |
571 | } | |
572 | ||
1da177e4 LT |
573 | /* |
574 | * Return a compatible lock_state. If no initialized lock_state structure | |
575 | * exists, return an uninitialized one. | |
576 | * | |
1da177e4 LT |
577 | */ |
578 | static struct nfs4_lock_state *nfs4_alloc_lock_state(struct nfs4_state *state, fl_owner_t fl_owner) | |
579 | { | |
580 | struct nfs4_lock_state *lsp; | |
adfa6f98 | 581 | struct nfs_client *clp = state->owner->so_client; |
1da177e4 | 582 | |
cee54fc9 | 583 | lsp = kzalloc(sizeof(*lsp), GFP_KERNEL); |
1da177e4 LT |
584 | if (lsp == NULL) |
585 | return NULL; | |
d0dc3701 TM |
586 | rpc_init_wait_queue(&lsp->ls_sequence.wait, "lock_seqid_waitqueue"); |
587 | spin_lock_init(&lsp->ls_sequence.lock); | |
588 | INIT_LIST_HEAD(&lsp->ls_sequence.list); | |
589 | lsp->ls_seqid.sequence = &lsp->ls_sequence; | |
1da177e4 | 590 | atomic_set(&lsp->ls_count, 1); |
b64aec8d | 591 | lsp->ls_state = state; |
1da177e4 | 592 | lsp->ls_owner = fl_owner; |
1da177e4 | 593 | spin_lock(&clp->cl_lock); |
9f958ab8 | 594 | nfs_alloc_unique_id(&clp->cl_lockowner_id, &lsp->ls_id, 1, 64); |
1da177e4 | 595 | spin_unlock(&clp->cl_lock); |
8d0a8a9d | 596 | INIT_LIST_HEAD(&lsp->ls_locks); |
1da177e4 LT |
597 | return lsp; |
598 | } | |
599 | ||
9f958ab8 TM |
600 | static void nfs4_free_lock_state(struct nfs4_lock_state *lsp) |
601 | { | |
602 | struct nfs_client *clp = lsp->ls_state->owner->so_client; | |
603 | ||
604 | spin_lock(&clp->cl_lock); | |
605 | nfs_free_unique_id(&clp->cl_lockowner_id, &lsp->ls_id); | |
606 | spin_unlock(&clp->cl_lock); | |
f6a1cc89 | 607 | rpc_destroy_wait_queue(&lsp->ls_sequence.wait); |
9f958ab8 TM |
608 | kfree(lsp); |
609 | } | |
610 | ||
1da177e4 LT |
611 | /* |
612 | * Return a compatible lock_state. If no initialized lock_state structure | |
613 | * exists, return an uninitialized one. | |
614 | * | |
1da177e4 | 615 | */ |
8d0a8a9d | 616 | static struct nfs4_lock_state *nfs4_get_lock_state(struct nfs4_state *state, fl_owner_t owner) |
1da177e4 | 617 | { |
8d0a8a9d | 618 | struct nfs4_lock_state *lsp, *new = NULL; |
1da177e4 | 619 | |
8d0a8a9d TM |
620 | for(;;) { |
621 | spin_lock(&state->state_lock); | |
622 | lsp = __nfs4_find_lock_state(state, owner); | |
623 | if (lsp != NULL) | |
624 | break; | |
625 | if (new != NULL) { | |
8d0a8a9d TM |
626 | list_add(&new->ls_locks, &state->lock_states); |
627 | set_bit(LK_STATE_IN_USE, &state->flags); | |
628 | lsp = new; | |
629 | new = NULL; | |
630 | break; | |
631 | } | |
632 | spin_unlock(&state->state_lock); | |
633 | new = nfs4_alloc_lock_state(state, owner); | |
634 | if (new == NULL) | |
635 | return NULL; | |
636 | } | |
637 | spin_unlock(&state->state_lock); | |
9f958ab8 TM |
638 | if (new != NULL) |
639 | nfs4_free_lock_state(new); | |
1da177e4 LT |
640 | return lsp; |
641 | } | |
642 | ||
643 | /* | |
8d0a8a9d TM |
644 | * Release reference to lock_state, and free it if we see that |
645 | * it is no longer in use | |
1da177e4 | 646 | */ |
faf5f49c | 647 | void nfs4_put_lock_state(struct nfs4_lock_state *lsp) |
1da177e4 | 648 | { |
8d0a8a9d | 649 | struct nfs4_state *state; |
1da177e4 | 650 | |
8d0a8a9d TM |
651 | if (lsp == NULL) |
652 | return; | |
653 | state = lsp->ls_state; | |
654 | if (!atomic_dec_and_lock(&lsp->ls_count, &state->state_lock)) | |
655 | return; | |
656 | list_del(&lsp->ls_locks); | |
657 | if (list_empty(&state->lock_states)) | |
658 | clear_bit(LK_STATE_IN_USE, &state->flags); | |
659 | spin_unlock(&state->state_lock); | |
9f958ab8 | 660 | nfs4_free_lock_state(lsp); |
1da177e4 LT |
661 | } |
662 | ||
8d0a8a9d | 663 | static void nfs4_fl_copy_lock(struct file_lock *dst, struct file_lock *src) |
1da177e4 | 664 | { |
8d0a8a9d | 665 | struct nfs4_lock_state *lsp = src->fl_u.nfs4_fl.owner; |
1da177e4 | 666 | |
8d0a8a9d TM |
667 | dst->fl_u.nfs4_fl.owner = lsp; |
668 | atomic_inc(&lsp->ls_count); | |
669 | } | |
1da177e4 | 670 | |
8d0a8a9d | 671 | static void nfs4_fl_release_lock(struct file_lock *fl) |
1da177e4 | 672 | { |
8d0a8a9d | 673 | nfs4_put_lock_state(fl->fl_u.nfs4_fl.owner); |
1da177e4 LT |
674 | } |
675 | ||
6aed6285 | 676 | static const struct file_lock_operations nfs4_fl_lock_ops = { |
8d0a8a9d TM |
677 | .fl_copy_lock = nfs4_fl_copy_lock, |
678 | .fl_release_private = nfs4_fl_release_lock, | |
679 | }; | |
680 | ||
681 | int nfs4_set_lock_state(struct nfs4_state *state, struct file_lock *fl) | |
1da177e4 | 682 | { |
8d0a8a9d TM |
683 | struct nfs4_lock_state *lsp; |
684 | ||
685 | if (fl->fl_ops != NULL) | |
686 | return 0; | |
687 | lsp = nfs4_get_lock_state(state, fl->fl_owner); | |
688 | if (lsp == NULL) | |
689 | return -ENOMEM; | |
690 | fl->fl_u.nfs4_fl.owner = lsp; | |
691 | fl->fl_ops = &nfs4_fl_lock_ops; | |
692 | return 0; | |
1da177e4 LT |
693 | } |
694 | ||
8d0a8a9d TM |
695 | /* |
696 | * Byte-range lock aware utility to initialize the stateid of read/write | |
697 | * requests. | |
1da177e4 | 698 | */ |
8d0a8a9d | 699 | void nfs4_copy_stateid(nfs4_stateid *dst, struct nfs4_state *state, fl_owner_t fl_owner) |
1da177e4 | 700 | { |
8d0a8a9d | 701 | struct nfs4_lock_state *lsp; |
8bda4e4c | 702 | int seq; |
1da177e4 | 703 | |
8bda4e4c TM |
704 | do { |
705 | seq = read_seqbegin(&state->seqlock); | |
706 | memcpy(dst, &state->stateid, sizeof(*dst)); | |
707 | } while (read_seqretry(&state->seqlock, seq)); | |
8d0a8a9d TM |
708 | if (test_bit(LK_STATE_IN_USE, &state->flags) == 0) |
709 | return; | |
1da177e4 | 710 | |
8d0a8a9d TM |
711 | spin_lock(&state->state_lock); |
712 | lsp = __nfs4_find_lock_state(state, fl_owner); | |
713 | if (lsp != NULL && (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0) | |
714 | memcpy(dst, &lsp->ls_stateid, sizeof(*dst)); | |
715 | spin_unlock(&state->state_lock); | |
1da177e4 LT |
716 | nfs4_put_lock_state(lsp); |
717 | } | |
718 | ||
cee54fc9 TM |
719 | struct nfs_seqid *nfs_alloc_seqid(struct nfs_seqid_counter *counter) |
720 | { | |
cee54fc9 TM |
721 | struct nfs_seqid *new; |
722 | ||
723 | new = kmalloc(sizeof(*new), GFP_KERNEL); | |
724 | if (new != NULL) { | |
725 | new->sequence = counter; | |
2f74c0a0 | 726 | INIT_LIST_HEAD(&new->list); |
cee54fc9 TM |
727 | } |
728 | return new; | |
729 | } | |
730 | ||
731 | void nfs_free_seqid(struct nfs_seqid *seqid) | |
1da177e4 | 732 | { |
2f74c0a0 TM |
733 | if (!list_empty(&seqid->list)) { |
734 | struct rpc_sequence *sequence = seqid->sequence->sequence; | |
cee54fc9 | 735 | |
2f74c0a0 TM |
736 | spin_lock(&sequence->lock); |
737 | list_del(&seqid->list); | |
738 | spin_unlock(&sequence->lock); | |
739 | rpc_wake_up(&sequence->wait); | |
740 | } | |
cee54fc9 | 741 | kfree(seqid); |
1da177e4 LT |
742 | } |
743 | ||
744 | /* | |
cee54fc9 TM |
745 | * Increment the seqid if the OPEN/OPEN_DOWNGRADE/CLOSE succeeded, or |
746 | * failed with a seqid incrementing error - | |
747 | * see comments nfs_fs.h:seqid_mutating_error() | |
748 | */ | |
88d90939 | 749 | static void nfs_increment_seqid(int status, struct nfs_seqid *seqid) |
cee54fc9 | 750 | { |
2f74c0a0 | 751 | BUG_ON(list_first_entry(&seqid->sequence->sequence->list, struct nfs_seqid, list) != seqid); |
cee54fc9 TM |
752 | switch (status) { |
753 | case 0: | |
754 | break; | |
755 | case -NFS4ERR_BAD_SEQID: | |
6f43ddcc TM |
756 | if (seqid->sequence->flags & NFS_SEQID_CONFIRMED) |
757 | return; | |
758 | printk(KERN_WARNING "NFS: v4 server returned a bad" | |
497799e7 DM |
759 | " sequence-id error on an" |
760 | " unconfirmed sequence %p!\n", | |
6f43ddcc | 761 | seqid->sequence); |
cee54fc9 TM |
762 | case -NFS4ERR_STALE_CLIENTID: |
763 | case -NFS4ERR_STALE_STATEID: | |
764 | case -NFS4ERR_BAD_STATEID: | |
765 | case -NFS4ERR_BADXDR: | |
766 | case -NFS4ERR_RESOURCE: | |
767 | case -NFS4ERR_NOFILEHANDLE: | |
768 | /* Non-seqid mutating errors */ | |
769 | return; | |
770 | }; | |
771 | /* | |
772 | * Note: no locking needed as we are guaranteed to be first | |
773 | * on the sequence list | |
774 | */ | |
775 | seqid->sequence->counter++; | |
776 | } | |
777 | ||
778 | void nfs_increment_open_seqid(int status, struct nfs_seqid *seqid) | |
779 | { | |
34dc1ad7 BH |
780 | struct nfs4_state_owner *sp = container_of(seqid->sequence, |
781 | struct nfs4_state_owner, so_seqid); | |
782 | struct nfs_server *server = sp->so_server; | |
783 | ||
784 | if (status == -NFS4ERR_BAD_SEQID) | |
1da177e4 | 785 | nfs4_drop_state_owner(sp); |
34dc1ad7 BH |
786 | if (!nfs4_has_session(server->nfs_client)) |
787 | nfs_increment_seqid(status, seqid); | |
cee54fc9 TM |
788 | } |
789 | ||
790 | /* | |
cee54fc9 TM |
791 | * Increment the seqid if the LOCK/LOCKU succeeded, or |
792 | * failed with a seqid incrementing error - | |
793 | * see comments nfs_fs.h:seqid_mutating_error() | |
794 | */ | |
795 | void nfs_increment_lock_seqid(int status, struct nfs_seqid *seqid) | |
796 | { | |
88d90939 | 797 | nfs_increment_seqid(status, seqid); |
cee54fc9 TM |
798 | } |
799 | ||
800 | int nfs_wait_on_sequence(struct nfs_seqid *seqid, struct rpc_task *task) | |
801 | { | |
802 | struct rpc_sequence *sequence = seqid->sequence->sequence; | |
803 | int status = 0; | |
804 | ||
805 | spin_lock(&sequence->lock); | |
2f74c0a0 TM |
806 | if (list_empty(&seqid->list)) |
807 | list_add_tail(&seqid->list, &sequence->list); | |
808 | if (list_first_entry(&sequence->list, struct nfs_seqid, list) == seqid) | |
809 | goto unlock; | |
5d00837b | 810 | rpc_sleep_on(&sequence->wait, task, NULL); |
2f74c0a0 TM |
811 | status = -EAGAIN; |
812 | unlock: | |
cee54fc9 TM |
813 | spin_unlock(&sequence->lock); |
814 | return status; | |
1da177e4 LT |
815 | } |
816 | ||
e005e804 | 817 | static int nfs4_run_state_manager(void *); |
1da177e4 | 818 | |
e005e804 | 819 | static void nfs4_clear_state_manager_bit(struct nfs_client *clp) |
433fbe4c TM |
820 | { |
821 | smp_mb__before_clear_bit(); | |
e005e804 | 822 | clear_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state); |
433fbe4c | 823 | smp_mb__after_clear_bit(); |
e005e804 | 824 | wake_up_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING); |
433fbe4c TM |
825 | rpc_wake_up(&clp->cl_rpcwaitq); |
826 | } | |
827 | ||
1da177e4 | 828 | /* |
e005e804 | 829 | * Schedule the nfs_client asynchronous state management routine |
1da177e4 | 830 | */ |
b0d3ded1 | 831 | void nfs4_schedule_state_manager(struct nfs_client *clp) |
1da177e4 | 832 | { |
5043e900 | 833 | struct task_struct *task; |
1da177e4 | 834 | |
e005e804 TM |
835 | if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) != 0) |
836 | return; | |
5043e900 TM |
837 | __module_get(THIS_MODULE); |
838 | atomic_inc(&clp->cl_count); | |
e005e804 | 839 | task = kthread_run(nfs4_run_state_manager, clp, "%s-manager", |
5d8515ca CL |
840 | rpc_peeraddr2str(clp->cl_rpcclient, |
841 | RPC_DISPLAY_ADDR)); | |
5043e900 TM |
842 | if (!IS_ERR(task)) |
843 | return; | |
e005e804 | 844 | nfs4_clear_state_manager_bit(clp); |
24c8dbbb | 845 | nfs_put_client(clp); |
5043e900 | 846 | module_put(THIS_MODULE); |
1da177e4 LT |
847 | } |
848 | ||
849 | /* | |
850 | * Schedule a state recovery attempt | |
851 | */ | |
adfa6f98 | 852 | void nfs4_schedule_state_recovery(struct nfs_client *clp) |
1da177e4 LT |
853 | { |
854 | if (!clp) | |
855 | return; | |
e598d843 TM |
856 | if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
857 | set_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); | |
e005e804 | 858 | nfs4_schedule_state_manager(clp); |
1da177e4 LT |
859 | } |
860 | ||
b79a4a1b TM |
861 | static int nfs4_state_mark_reclaim_reboot(struct nfs_client *clp, struct nfs4_state *state) |
862 | { | |
863 | ||
864 | set_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); | |
865 | /* Don't recover state that expired before the reboot */ | |
866 | if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) { | |
867 | clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); | |
868 | return 0; | |
869 | } | |
7eff03ae | 870 | set_bit(NFS_OWNER_RECLAIM_REBOOT, &state->owner->so_flags); |
b79a4a1b TM |
871 | set_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state); |
872 | return 1; | |
873 | } | |
874 | ||
9e33bed5 | 875 | int nfs4_state_mark_reclaim_nograce(struct nfs_client *clp, struct nfs4_state *state) |
b79a4a1b TM |
876 | { |
877 | set_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags); | |
878 | clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); | |
7eff03ae | 879 | set_bit(NFS_OWNER_RECLAIM_NOGRACE, &state->owner->so_flags); |
b79a4a1b TM |
880 | set_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state); |
881 | return 1; | |
882 | } | |
883 | ||
02860014 | 884 | static int nfs4_reclaim_locks(struct nfs4_state *state, const struct nfs4_state_recovery_ops *ops) |
1da177e4 LT |
885 | { |
886 | struct inode *inode = state->inode; | |
19e03c57 | 887 | struct nfs_inode *nfsi = NFS_I(inode); |
1da177e4 LT |
888 | struct file_lock *fl; |
889 | int status = 0; | |
890 | ||
3f09df70 TM |
891 | if (inode->i_flock == NULL) |
892 | return 0; | |
893 | ||
894 | /* Guard against delegation returns and new lock/unlock calls */ | |
19e03c57 | 895 | down_write(&nfsi->rwsem); |
3f09df70 TM |
896 | /* Protect inode->i_flock using the BKL */ |
897 | lock_kernel(); | |
90dc7d27 | 898 | for (fl = inode->i_flock; fl != NULL; fl = fl->fl_next) { |
43b2a33a | 899 | if (!(fl->fl_flags & (FL_POSIX|FL_FLOCK))) |
1da177e4 | 900 | continue; |
cd3758e3 | 901 | if (nfs_file_open_context(fl->fl_file)->state != state) |
1da177e4 | 902 | continue; |
3f09df70 | 903 | unlock_kernel(); |
1da177e4 | 904 | status = ops->recover_lock(state, fl); |
1da177e4 | 905 | switch (status) { |
965b5d67 TM |
906 | case 0: |
907 | break; | |
908 | case -ESTALE: | |
909 | case -NFS4ERR_ADMIN_REVOKED: | |
910 | case -NFS4ERR_STALE_STATEID: | |
911 | case -NFS4ERR_BAD_STATEID: | |
912 | case -NFS4ERR_EXPIRED: | |
913 | case -NFS4ERR_NO_GRACE: | |
914 | case -NFS4ERR_STALE_CLIENTID: | |
9c4c761a TM |
915 | case -NFS4ERR_BADSESSION: |
916 | case -NFS4ERR_BADSLOT: | |
917 | case -NFS4ERR_BAD_HIGH_SLOT: | |
918 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
965b5d67 | 919 | goto out; |
1da177e4 LT |
920 | default: |
921 | printk(KERN_ERR "%s: unhandled error %d. Zeroing state\n", | |
3110ff80 | 922 | __func__, status); |
965b5d67 TM |
923 | case -ENOMEM: |
924 | case -NFS4ERR_DENIED: | |
1da177e4 LT |
925 | case -NFS4ERR_RECLAIM_BAD: |
926 | case -NFS4ERR_RECLAIM_CONFLICT: | |
43b2a33a | 927 | /* kill_proc(fl->fl_pid, SIGLOST, 1); */ |
965b5d67 | 928 | status = 0; |
1da177e4 | 929 | } |
3f09df70 | 930 | lock_kernel(); |
1da177e4 | 931 | } |
3f09df70 | 932 | unlock_kernel(); |
965b5d67 | 933 | out: |
19e03c57 | 934 | up_write(&nfsi->rwsem); |
1da177e4 LT |
935 | return status; |
936 | } | |
937 | ||
02860014 | 938 | static int nfs4_reclaim_open_state(struct nfs4_state_owner *sp, const struct nfs4_state_recovery_ops *ops) |
1da177e4 LT |
939 | { |
940 | struct nfs4_state *state; | |
941 | struct nfs4_lock_state *lock; | |
942 | int status = 0; | |
943 | ||
944 | /* Note: we rely on the sp->so_states list being ordered | |
945 | * so that we always reclaim open(O_RDWR) and/or open(O_WRITE) | |
946 | * states first. | |
947 | * This is needed to ensure that the server won't give us any | |
948 | * read delegations that we have to return if, say, we are | |
949 | * recovering after a network partition or a reboot from a | |
950 | * server that doesn't support a grace period. | |
951 | */ | |
fe1d8195 TM |
952 | restart: |
953 | spin_lock(&sp->so_lock); | |
1da177e4 | 954 | list_for_each_entry(state, &sp->so_states, open_states) { |
b79a4a1b TM |
955 | if (!test_and_clear_bit(ops->state_flag_bit, &state->flags)) |
956 | continue; | |
1da177e4 LT |
957 | if (state->state == 0) |
958 | continue; | |
fe1d8195 TM |
959 | atomic_inc(&state->count); |
960 | spin_unlock(&sp->so_lock); | |
1da177e4 | 961 | status = ops->recover_open(sp, state); |
1da177e4 | 962 | if (status >= 0) { |
02860014 TM |
963 | status = nfs4_reclaim_locks(state, ops); |
964 | if (status >= 0) { | |
965 | list_for_each_entry(lock, &state->lock_states, ls_locks) { | |
966 | if (!(lock->ls_flags & NFS_LOCK_INITIALIZED)) | |
967 | printk("%s: Lock reclaim failed!\n", | |
3110ff80 | 968 | __func__); |
02860014 | 969 | } |
fe1d8195 TM |
970 | nfs4_put_open_state(state); |
971 | goto restart; | |
1da177e4 | 972 | } |
1da177e4 LT |
973 | } |
974 | switch (status) { | |
975 | default: | |
976 | printk(KERN_ERR "%s: unhandled error %d. Zeroing state\n", | |
3110ff80 | 977 | __func__, status); |
1da177e4 | 978 | case -ENOENT: |
965b5d67 | 979 | case -ENOMEM: |
b79a4a1b | 980 | case -ESTALE: |
1da177e4 LT |
981 | /* |
982 | * Open state on this file cannot be recovered | |
983 | * All we can do is revert to using the zero stateid. | |
984 | */ | |
985 | memset(state->stateid.data, 0, | |
986 | sizeof(state->stateid.data)); | |
987 | /* Mark the file as being 'closed' */ | |
988 | state->state = 0; | |
989 | break; | |
965b5d67 TM |
990 | case -NFS4ERR_ADMIN_REVOKED: |
991 | case -NFS4ERR_STALE_STATEID: | |
992 | case -NFS4ERR_BAD_STATEID: | |
b79a4a1b TM |
993 | case -NFS4ERR_RECLAIM_BAD: |
994 | case -NFS4ERR_RECLAIM_CONFLICT: | |
995 | nfs4_state_mark_reclaim_nograce(sp->so_client, state); | |
996 | break; | |
1da177e4 LT |
997 | case -NFS4ERR_EXPIRED: |
998 | case -NFS4ERR_NO_GRACE: | |
b79a4a1b | 999 | nfs4_state_mark_reclaim_nograce(sp->so_client, state); |
1da177e4 | 1000 | case -NFS4ERR_STALE_CLIENTID: |
9c4c761a TM |
1001 | case -NFS4ERR_BADSESSION: |
1002 | case -NFS4ERR_BADSLOT: | |
1003 | case -NFS4ERR_BAD_HIGH_SLOT: | |
1004 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
1da177e4 LT |
1005 | goto out_err; |
1006 | } | |
fe1d8195 TM |
1007 | nfs4_put_open_state(state); |
1008 | goto restart; | |
1da177e4 | 1009 | } |
fe1d8195 | 1010 | spin_unlock(&sp->so_lock); |
1da177e4 LT |
1011 | return 0; |
1012 | out_err: | |
fe1d8195 | 1013 | nfs4_put_open_state(state); |
1da177e4 LT |
1014 | return status; |
1015 | } | |
1016 | ||
b79a4a1b TM |
1017 | static void nfs4_clear_open_state(struct nfs4_state *state) |
1018 | { | |
1019 | struct nfs4_lock_state *lock; | |
1020 | ||
1021 | clear_bit(NFS_DELEGATED_STATE, &state->flags); | |
1022 | clear_bit(NFS_O_RDONLY_STATE, &state->flags); | |
1023 | clear_bit(NFS_O_WRONLY_STATE, &state->flags); | |
1024 | clear_bit(NFS_O_RDWR_STATE, &state->flags); | |
1025 | list_for_each_entry(lock, &state->lock_states, ls_locks) { | |
b79a4a1b TM |
1026 | lock->ls_seqid.flags = 0; |
1027 | lock->ls_flags &= ~NFS_LOCK_INITIALIZED; | |
1028 | } | |
1029 | } | |
1030 | ||
1031 | static void nfs4_state_mark_reclaim_helper(struct nfs_client *clp, int (*mark_reclaim)(struct nfs_client *clp, struct nfs4_state *state)) | |
cee54fc9 TM |
1032 | { |
1033 | struct nfs4_state_owner *sp; | |
9f958ab8 | 1034 | struct rb_node *pos; |
cee54fc9 | 1035 | struct nfs4_state *state; |
cee54fc9 TM |
1036 | |
1037 | /* Reset all sequence ids to zero */ | |
9f958ab8 TM |
1038 | for (pos = rb_first(&clp->cl_state_owners); pos != NULL; pos = rb_next(pos)) { |
1039 | sp = rb_entry(pos, struct nfs4_state_owner, so_client_node); | |
cee54fc9 | 1040 | sp->so_seqid.flags = 0; |
ec073428 | 1041 | spin_lock(&sp->so_lock); |
cee54fc9 | 1042 | list_for_each_entry(state, &sp->so_states, open_states) { |
b79a4a1b TM |
1043 | if (mark_reclaim(clp, state)) |
1044 | nfs4_clear_open_state(state); | |
cee54fc9 | 1045 | } |
ec073428 | 1046 | spin_unlock(&sp->so_lock); |
cee54fc9 TM |
1047 | } |
1048 | } | |
1049 | ||
b79a4a1b TM |
1050 | static void nfs4_state_start_reclaim_reboot(struct nfs_client *clp) |
1051 | { | |
1052 | /* Mark all delegations for reclaim */ | |
1053 | nfs_delegation_mark_reclaim(clp); | |
1054 | nfs4_state_mark_reclaim_helper(clp, nfs4_state_mark_reclaim_reboot); | |
1055 | } | |
1056 | ||
fce5c838 RL |
1057 | static void nfs4_reclaim_complete(struct nfs_client *clp, |
1058 | const struct nfs4_state_recovery_ops *ops) | |
1059 | { | |
1060 | /* Notify the server we're done reclaiming our state */ | |
1061 | if (ops->reclaim_complete) | |
1062 | (void)ops->reclaim_complete(clp); | |
1063 | } | |
1064 | ||
b79a4a1b TM |
1065 | static void nfs4_state_end_reclaim_reboot(struct nfs_client *clp) |
1066 | { | |
1067 | struct nfs4_state_owner *sp; | |
1068 | struct rb_node *pos; | |
1069 | struct nfs4_state *state; | |
1070 | ||
da6ebfe3 RL |
1071 | nfs4_reclaim_complete(clp, |
1072 | nfs4_reboot_recovery_ops[clp->cl_minorversion]); | |
1073 | ||
b79a4a1b TM |
1074 | if (!test_and_clear_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) |
1075 | return; | |
1076 | ||
1077 | for (pos = rb_first(&clp->cl_state_owners); pos != NULL; pos = rb_next(pos)) { | |
1078 | sp = rb_entry(pos, struct nfs4_state_owner, so_client_node); | |
1079 | spin_lock(&sp->so_lock); | |
1080 | list_for_each_entry(state, &sp->so_states, open_states) { | |
1081 | if (!test_and_clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags)) | |
1082 | continue; | |
1083 | nfs4_state_mark_reclaim_nograce(clp, state); | |
1084 | } | |
1085 | spin_unlock(&sp->so_lock); | |
1086 | } | |
1087 | ||
1088 | nfs_delegation_reap_unclaimed(clp); | |
1089 | } | |
1090 | ||
1091 | static void nfs_delegation_clear_all(struct nfs_client *clp) | |
1092 | { | |
1093 | nfs_delegation_mark_reclaim(clp); | |
1094 | nfs_delegation_reap_unclaimed(clp); | |
1095 | } | |
1096 | ||
1097 | static void nfs4_state_start_reclaim_nograce(struct nfs_client *clp) | |
1098 | { | |
1099 | nfs_delegation_clear_all(clp); | |
1100 | nfs4_state_mark_reclaim_helper(clp, nfs4_state_mark_reclaim_nograce); | |
1101 | } | |
1102 | ||
4f7cdf18 | 1103 | static int nfs4_recovery_handle_error(struct nfs_client *clp, int error) |
e598d843 TM |
1104 | { |
1105 | switch (error) { | |
1106 | case -NFS4ERR_CB_PATH_DOWN: | |
707fb4b3 | 1107 | nfs_handle_cb_pathdown(clp); |
4f7cdf18 | 1108 | return 0; |
c8b7ae3d TM |
1109 | case -NFS4ERR_NO_GRACE: |
1110 | nfs4_state_end_reclaim_reboot(clp); | |
1111 | return 0; | |
e598d843 TM |
1112 | case -NFS4ERR_STALE_CLIENTID: |
1113 | case -NFS4ERR_LEASE_MOVED: | |
1114 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
e345e88a | 1115 | nfs4_state_end_reclaim_reboot(clp); |
e598d843 TM |
1116 | nfs4_state_start_reclaim_reboot(clp); |
1117 | break; | |
1118 | case -NFS4ERR_EXPIRED: | |
1119 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1120 | nfs4_state_start_reclaim_nograce(clp); | |
8ba9bf8e | 1121 | break; |
c3fad1b1 AA |
1122 | case -NFS4ERR_BADSESSION: |
1123 | case -NFS4ERR_BADSLOT: | |
1124 | case -NFS4ERR_BAD_HIGH_SLOT: | |
1125 | case -NFS4ERR_DEADSESSION: | |
1126 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
1127 | case -NFS4ERR_SEQ_FALSE_RETRY: | |
1128 | case -NFS4ERR_SEQ_MISORDERED: | |
6df08189 | 1129 | set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); |
0b9e2d41 AA |
1130 | /* Zero session reset errors */ |
1131 | return 0; | |
e598d843 | 1132 | } |
4f7cdf18 | 1133 | return error; |
e598d843 TM |
1134 | } |
1135 | ||
02860014 | 1136 | static int nfs4_do_reclaim(struct nfs_client *clp, const struct nfs4_state_recovery_ops *ops) |
1da177e4 | 1137 | { |
9f958ab8 | 1138 | struct rb_node *pos; |
1da177e4 LT |
1139 | int status = 0; |
1140 | ||
7eff03ae TM |
1141 | restart: |
1142 | spin_lock(&clp->cl_lock); | |
02860014 TM |
1143 | for (pos = rb_first(&clp->cl_state_owners); pos != NULL; pos = rb_next(pos)) { |
1144 | struct nfs4_state_owner *sp = rb_entry(pos, struct nfs4_state_owner, so_client_node); | |
7eff03ae TM |
1145 | if (!test_and_clear_bit(ops->owner_flag_bit, &sp->so_flags)) |
1146 | continue; | |
1147 | atomic_inc(&sp->so_count); | |
1148 | spin_unlock(&clp->cl_lock); | |
02860014 | 1149 | status = nfs4_reclaim_open_state(sp, ops); |
7eff03ae TM |
1150 | if (status < 0) { |
1151 | set_bit(ops->owner_flag_bit, &sp->so_flags); | |
1152 | nfs4_put_state_owner(sp); | |
4f7cdf18 | 1153 | return nfs4_recovery_handle_error(clp, status); |
7eff03ae TM |
1154 | } |
1155 | nfs4_put_state_owner(sp); | |
1156 | goto restart; | |
02860014 | 1157 | } |
7eff03ae | 1158 | spin_unlock(&clp->cl_lock); |
02860014 TM |
1159 | return status; |
1160 | } | |
1161 | ||
1162 | static int nfs4_check_lease(struct nfs_client *clp) | |
1163 | { | |
1164 | struct rpc_cred *cred; | |
8e69514f BH |
1165 | struct nfs4_state_maintenance_ops *ops = |
1166 | nfs4_state_renewal_ops[clp->cl_minorversion]; | |
02860014 | 1167 | int status = -NFS4ERR_EXPIRED; |
1da177e4 | 1168 | |
0f605b56 TM |
1169 | /* Is the client already known to have an expired lease? */ |
1170 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) | |
1171 | return 0; | |
a7b72103 AA |
1172 | spin_lock(&clp->cl_lock); |
1173 | cred = ops->get_state_renewal_cred_locked(clp); | |
1174 | spin_unlock(&clp->cl_lock); | |
0f605b56 TM |
1175 | if (cred == NULL) { |
1176 | cred = nfs4_get_setclientid_cred(clp); | |
1177 | if (cred == NULL) | |
1178 | goto out; | |
286d7d6a | 1179 | } |
8e69514f | 1180 | status = ops->renew_lease(clp, cred); |
0f605b56 TM |
1181 | put_rpccred(cred); |
1182 | out: | |
4f7cdf18 | 1183 | return nfs4_recovery_handle_error(clp, status); |
02860014 TM |
1184 | } |
1185 | ||
1186 | static int nfs4_reclaim_lease(struct nfs_client *clp) | |
1187 | { | |
1188 | struct rpc_cred *cred; | |
591d71cb AA |
1189 | struct nfs4_state_recovery_ops *ops = |
1190 | nfs4_reboot_recovery_ops[clp->cl_minorversion]; | |
02860014 TM |
1191 | int status = -ENOENT; |
1192 | ||
90a16617 | 1193 | cred = ops->get_clid_cred(clp); |
286d7d6a | 1194 | if (cred != NULL) { |
591d71cb | 1195 | status = ops->establish_clid(clp, cred); |
286d7d6a | 1196 | put_rpccred(cred); |
a2b2bb88 TM |
1197 | /* Handle case where the user hasn't set up machine creds */ |
1198 | if (status == -EACCES && cred == clp->cl_machine_cred) { | |
1199 | nfs4_clear_machine_cred(clp); | |
02860014 | 1200 | status = -EAGAIN; |
a2b2bb88 | 1201 | } |
c2e713dd BH |
1202 | if (status == -NFS4ERR_MINOR_VERS_MISMATCH) |
1203 | status = -EPROTONOSUPPORT; | |
286d7d6a | 1204 | } |
02860014 TM |
1205 | return status; |
1206 | } | |
1207 | ||
76db6d95 | 1208 | #ifdef CONFIG_NFS_V4_1 |
0629e370 AB |
1209 | void nfs41_handle_sequence_flag_errors(struct nfs_client *clp, u32 flags) |
1210 | { | |
1211 | if (!flags) | |
1212 | return; | |
1213 | else if (flags & SEQ4_STATUS_RESTART_RECLAIM_NEEDED) { | |
1214 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1215 | nfs4_state_start_reclaim_reboot(clp); | |
1216 | nfs4_schedule_state_recovery(clp); | |
1217 | } else if (flags & (SEQ4_STATUS_EXPIRED_ALL_STATE_REVOKED | | |
1218 | SEQ4_STATUS_EXPIRED_SOME_STATE_REVOKED | | |
1219 | SEQ4_STATUS_ADMIN_STATE_REVOKED | | |
1220 | SEQ4_STATUS_RECALLABLE_STATE_REVOKED | | |
1221 | SEQ4_STATUS_LEASE_MOVED)) { | |
1222 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1223 | nfs4_state_start_reclaim_nograce(clp); | |
1224 | nfs4_schedule_state_recovery(clp); | |
1225 | } else if (flags & (SEQ4_STATUS_CB_PATH_DOWN | | |
1226 | SEQ4_STATUS_BACKCHANNEL_FAULT | | |
1227 | SEQ4_STATUS_CB_PATH_DOWN_SESSION)) | |
1228 | nfs_expire_all_delegations(clp); | |
1229 | } | |
1230 | ||
c3fad1b1 AA |
1231 | static void nfs4_session_recovery_handle_error(struct nfs_client *clp, int err) |
1232 | { | |
1233 | switch (err) { | |
1234 | case -NFS4ERR_STALE_CLIENTID: | |
1235 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
c3fad1b1 AA |
1236 | } |
1237 | } | |
1238 | ||
1239 | static int nfs4_reset_session(struct nfs_client *clp) | |
1240 | { | |
ea028ac9 AA |
1241 | struct nfs4_session *ses = clp->cl_session; |
1242 | struct nfs4_slot_table *tbl = &ses->fc_slot_table; | |
c3fad1b1 AA |
1243 | int status; |
1244 | ||
ea028ac9 | 1245 | spin_lock(&tbl->slot_tbl_lock); |
0556d1a6 | 1246 | set_bit(NFS4CLNT_SESSION_DRAINING, &clp->cl_state); |
ea028ac9 | 1247 | if (tbl->highest_used_slotid != -1) { |
35dc1d74 | 1248 | INIT_COMPLETION(ses->complete); |
ea028ac9 AA |
1249 | spin_unlock(&tbl->slot_tbl_lock); |
1250 | status = wait_for_completion_interruptible(&ses->complete); | |
ea028ac9 AA |
1251 | if (status) /* -ERESTARTSYS */ |
1252 | goto out; | |
1253 | } else { | |
1254 | spin_unlock(&tbl->slot_tbl_lock); | |
1255 | } | |
1256 | ||
c3fad1b1 AA |
1257 | status = nfs4_proc_destroy_session(clp->cl_session); |
1258 | if (status && status != -NFS4ERR_BADSESSION && | |
1259 | status != -NFS4ERR_DEADSESSION) { | |
1260 | nfs4_session_recovery_handle_error(clp, status); | |
1261 | goto out; | |
1262 | } | |
1263 | ||
1264 | memset(clp->cl_session->sess_id.data, 0, NFS4_MAX_SESSIONID_LEN); | |
f26468fb | 1265 | status = nfs4_proc_create_session(clp); |
c3fad1b1 AA |
1266 | if (status) |
1267 | nfs4_session_recovery_handle_error(clp, status); | |
1268 | /* fall through*/ | |
1269 | out: | |
1270 | /* Wake up the next rpc task even on error */ | |
0b9e2d41 | 1271 | clear_bit(NFS4CLNT_SESSION_DRAINING, &clp->cl_state); |
35dc1d74 | 1272 | rpc_wake_up(&clp->cl_session->fc_slot_table.slot_tbl_waitq); |
9430fb6b RL |
1273 | if (status == 0) |
1274 | nfs41_setup_state_renewal(clp); | |
c3fad1b1 AA |
1275 | return status; |
1276 | } | |
76db6d95 | 1277 | |
76db6d95 | 1278 | #else /* CONFIG_NFS_V4_1 */ |
c3fad1b1 | 1279 | static int nfs4_reset_session(struct nfs_client *clp) { return 0; } |
76db6d95 AA |
1280 | #endif /* CONFIG_NFS_V4_1 */ |
1281 | ||
78722e9c AA |
1282 | /* Set NFS4CLNT_LEASE_EXPIRED for all v4.0 errors and for recoverable errors |
1283 | * on EXCHANGE_ID for v4.1 | |
1284 | */ | |
1285 | static void nfs4_set_lease_expired(struct nfs_client *clp, int status) | |
1286 | { | |
1287 | if (nfs4_has_session(clp)) { | |
1288 | switch (status) { | |
1289 | case -NFS4ERR_DELAY: | |
1290 | case -NFS4ERR_CLID_INUSE: | |
1291 | case -EAGAIN: | |
1292 | break; | |
1293 | ||
1294 | case -NFS4ERR_NOT_SAME: /* FixMe: implement recovery | |
1295 | * in nfs4_exchange_id */ | |
1296 | default: | |
1297 | return; | |
1298 | } | |
1299 | } | |
1300 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1301 | } | |
1302 | ||
e005e804 | 1303 | static void nfs4_state_manager(struct nfs_client *clp) |
02860014 | 1304 | { |
02860014 TM |
1305 | int status = 0; |
1306 | ||
02860014 | 1307 | /* Ensure exclusive access to NFSv4 state */ |
f3c76491 | 1308 | for(;;) { |
b79a4a1b TM |
1309 | if (test_and_clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) { |
1310 | /* We're going to have to re-establish a clientid */ | |
1311 | status = nfs4_reclaim_lease(clp); | |
1312 | if (status) { | |
78722e9c | 1313 | nfs4_set_lease_expired(clp, status); |
b6d408ba TM |
1314 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, |
1315 | &clp->cl_state)) | |
b79a4a1b | 1316 | continue; |
76db6d95 AA |
1317 | if (clp->cl_cons_state == |
1318 | NFS_CS_SESSION_INITING) | |
1319 | nfs_mark_client_ready(clp, status); | |
b79a4a1b TM |
1320 | goto out_error; |
1321 | } | |
e598d843 TM |
1322 | clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); |
1323 | } | |
1324 | ||
1325 | if (test_and_clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state)) { | |
1326 | status = nfs4_check_lease(clp); | |
b6d408ba | 1327 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
e598d843 | 1328 | continue; |
b6d408ba TM |
1329 | if (status < 0 && status != -NFS4ERR_CB_PATH_DOWN) |
1330 | goto out_error; | |
b79a4a1b | 1331 | } |
b6d408ba | 1332 | |
c3fad1b1 | 1333 | /* Initialize or reset the session */ |
6df08189 | 1334 | if (test_and_clear_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state) |
7111dc73 | 1335 | && nfs4_has_session(clp)) { |
4d643d1d | 1336 | status = nfs4_reset_session(clp); |
b6d408ba TM |
1337 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
1338 | continue; | |
1339 | if (status < 0) | |
76db6d95 | 1340 | goto out_error; |
76db6d95 | 1341 | } |
b6d408ba | 1342 | |
b79a4a1b | 1343 | /* First recover reboot state... */ |
e345e88a | 1344 | if (test_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) { |
591d71cb AA |
1345 | status = nfs4_do_reclaim(clp, |
1346 | nfs4_reboot_recovery_ops[clp->cl_minorversion]); | |
b6d408ba | 1347 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) || |
6df08189 | 1348 | test_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state)) |
c3fad1b1 | 1349 | continue; |
b79a4a1b | 1350 | nfs4_state_end_reclaim_reboot(clp); |
b6d408ba TM |
1351 | if (test_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) |
1352 | continue; | |
1353 | if (status < 0) | |
1354 | goto out_error; | |
02860014 TM |
1355 | } |
1356 | ||
b79a4a1b TM |
1357 | /* Now recover expired state... */ |
1358 | if (test_and_clear_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) { | |
591d71cb AA |
1359 | status = nfs4_do_reclaim(clp, |
1360 | nfs4_nograce_recovery_ops[clp->cl_minorversion]); | |
b6d408ba | 1361 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) || |
6df08189 | 1362 | test_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state) || |
b6d408ba TM |
1363 | test_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) |
1364 | continue; | |
1365 | if (status < 0) | |
b79a4a1b | 1366 | goto out_error; |
1da177e4 | 1367 | } |
707fb4b3 TM |
1368 | |
1369 | if (test_and_clear_bit(NFS4CLNT_DELEGRETURN, &clp->cl_state)) { | |
1370 | nfs_client_return_marked_delegations(clp); | |
1371 | continue; | |
1372 | } | |
e005e804 TM |
1373 | |
1374 | nfs4_clear_state_manager_bit(clp); | |
f3c76491 TM |
1375 | /* Did we race with an attempt to give us more work? */ |
1376 | if (clp->cl_state == 0) | |
1377 | break; | |
1378 | if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) != 0) | |
1379 | break; | |
1da177e4 | 1380 | } |
e005e804 | 1381 | return; |
1da177e4 | 1382 | out_error: |
e005e804 | 1383 | printk(KERN_WARNING "Error: state manager failed on NFSv4 server %s" |
5d8515ca | 1384 | " with error %d\n", clp->cl_hostname, -status); |
e005e804 TM |
1385 | nfs4_clear_state_manager_bit(clp); |
1386 | } | |
1387 | ||
1388 | static int nfs4_run_state_manager(void *ptr) | |
1389 | { | |
1390 | struct nfs_client *clp = ptr; | |
1391 | ||
1392 | allow_signal(SIGKILL); | |
1393 | nfs4_state_manager(clp); | |
1394 | nfs_put_client(clp); | |
1395 | module_put_and_exit(0); | |
1396 | return 0; | |
1da177e4 LT |
1397 | } |
1398 | ||
1399 | /* | |
1400 | * Local variables: | |
1401 | * c-basic-offset: 8 | |
1402 | * End: | |
1403 | */ |