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 | ||
9dfdf404 RL |
138 | static void nfs41_end_drain_session(struct nfs_client *clp, |
139 | struct nfs4_session *ses) | |
140 | { | |
141 | if (test_and_clear_bit(NFS4CLNT_SESSION_DRAINING, &clp->cl_state)) | |
142 | rpc_wake_up(&ses->fc_slot_table.slot_tbl_waitq); | |
143 | } | |
144 | ||
145 | static int nfs41_begin_drain_session(struct nfs_client *clp, | |
146 | struct nfs4_session *ses) | |
147 | { | |
148 | struct nfs4_slot_table *tbl = &ses->fc_slot_table; | |
149 | ||
150 | spin_lock(&tbl->slot_tbl_lock); | |
151 | set_bit(NFS4CLNT_SESSION_DRAINING, &clp->cl_state); | |
152 | if (tbl->highest_used_slotid != -1) { | |
153 | INIT_COMPLETION(ses->complete); | |
154 | spin_unlock(&tbl->slot_tbl_lock); | |
155 | return wait_for_completion_interruptible(&ses->complete); | |
156 | } | |
157 | spin_unlock(&tbl->slot_tbl_lock); | |
158 | return 0; | |
159 | } | |
160 | ||
4d643d1d AA |
161 | int nfs41_init_clientid(struct nfs_client *clp, struct rpc_cred *cred) |
162 | { | |
163 | int status; | |
164 | ||
9dfdf404 RL |
165 | status = nfs41_begin_drain_session(clp, clp->cl_session); |
166 | if (status != 0) | |
167 | goto out; | |
4d643d1d | 168 | status = nfs4_proc_exchange_id(clp, cred); |
9430fb6b RL |
169 | if (status != 0) |
170 | goto out; | |
171 | status = nfs4_proc_create_session(clp); | |
172 | if (status != 0) | |
173 | goto out; | |
9dfdf404 | 174 | nfs41_end_drain_session(clp, clp->cl_session); |
9430fb6b RL |
175 | nfs41_setup_state_renewal(clp); |
176 | nfs_mark_client_ready(clp, NFS_CS_READY); | |
177 | out: | |
4d643d1d AA |
178 | return status; |
179 | } | |
180 | ||
b4b82607 AA |
181 | struct rpc_cred *nfs4_get_exchange_id_cred(struct nfs_client *clp) |
182 | { | |
183 | struct rpc_cred *cred; | |
184 | ||
185 | spin_lock(&clp->cl_lock); | |
186 | cred = nfs4_get_machine_cred_locked(clp); | |
187 | spin_unlock(&clp->cl_lock); | |
188 | return cred; | |
189 | } | |
190 | ||
191 | #endif /* CONFIG_NFS_V4_1 */ | |
192 | ||
a7b72103 | 193 | struct rpc_cred *nfs4_get_setclientid_cred(struct nfs_client *clp) |
286d7d6a TM |
194 | { |
195 | struct nfs4_state_owner *sp; | |
9f958ab8 | 196 | struct rb_node *pos; |
a2b2bb88 | 197 | struct rpc_cred *cred; |
286d7d6a | 198 | |
6dc9d57a TM |
199 | spin_lock(&clp->cl_lock); |
200 | cred = nfs4_get_machine_cred_locked(clp); | |
a2b2bb88 TM |
201 | if (cred != NULL) |
202 | goto out; | |
9f958ab8 TM |
203 | pos = rb_first(&clp->cl_state_owners); |
204 | if (pos != NULL) { | |
205 | sp = rb_entry(pos, struct nfs4_state_owner, so_client_node); | |
a2b2bb88 | 206 | cred = get_rpccred(sp->so_cred); |
286d7d6a | 207 | } |
a2b2bb88 | 208 | out: |
6dc9d57a | 209 | spin_unlock(&clp->cl_lock); |
a2b2bb88 | 210 | return cred; |
286d7d6a TM |
211 | } |
212 | ||
9f958ab8 TM |
213 | static void nfs_alloc_unique_id(struct rb_root *root, struct nfs_unique_id *new, |
214 | __u64 minval, int maxbits) | |
215 | { | |
216 | struct rb_node **p, *parent; | |
217 | struct nfs_unique_id *pos; | |
218 | __u64 mask = ~0ULL; | |
219 | ||
220 | if (maxbits < 64) | |
221 | mask = (1ULL << maxbits) - 1ULL; | |
222 | ||
223 | /* Ensure distribution is more or less flat */ | |
224 | get_random_bytes(&new->id, sizeof(new->id)); | |
225 | new->id &= mask; | |
226 | if (new->id < minval) | |
227 | new->id += minval; | |
228 | retry: | |
229 | p = &root->rb_node; | |
230 | parent = NULL; | |
231 | ||
232 | while (*p != NULL) { | |
233 | parent = *p; | |
234 | pos = rb_entry(parent, struct nfs_unique_id, rb_node); | |
235 | ||
236 | if (new->id < pos->id) | |
237 | p = &(*p)->rb_left; | |
238 | else if (new->id > pos->id) | |
239 | p = &(*p)->rb_right; | |
240 | else | |
241 | goto id_exists; | |
242 | } | |
243 | rb_link_node(&new->rb_node, parent, p); | |
244 | rb_insert_color(&new->rb_node, root); | |
245 | return; | |
246 | id_exists: | |
247 | for (;;) { | |
248 | new->id++; | |
249 | if (new->id < minval || (new->id & mask) != new->id) { | |
250 | new->id = minval; | |
251 | break; | |
252 | } | |
253 | parent = rb_next(parent); | |
254 | if (parent == NULL) | |
255 | break; | |
256 | pos = rb_entry(parent, struct nfs_unique_id, rb_node); | |
257 | if (new->id < pos->id) | |
258 | break; | |
259 | } | |
260 | goto retry; | |
261 | } | |
262 | ||
263 | static void nfs_free_unique_id(struct rb_root *root, struct nfs_unique_id *id) | |
264 | { | |
265 | rb_erase(&id->rb_node, root); | |
266 | } | |
267 | ||
1da177e4 | 268 | static struct nfs4_state_owner * |
6f2e64d3 | 269 | nfs4_find_state_owner(struct nfs_server *server, struct rpc_cred *cred) |
1da177e4 | 270 | { |
6f2e64d3 | 271 | struct nfs_client *clp = server->nfs_client; |
9f958ab8 TM |
272 | struct rb_node **p = &clp->cl_state_owners.rb_node, |
273 | *parent = NULL; | |
1da177e4 LT |
274 | struct nfs4_state_owner *sp, *res = NULL; |
275 | ||
9f958ab8 TM |
276 | while (*p != NULL) { |
277 | parent = *p; | |
278 | sp = rb_entry(parent, struct nfs4_state_owner, so_client_node); | |
279 | ||
6f2e64d3 TM |
280 | if (server < sp->so_server) { |
281 | p = &parent->rb_left; | |
282 | continue; | |
283 | } | |
284 | if (server > sp->so_server) { | |
285 | p = &parent->rb_right; | |
286 | continue; | |
287 | } | |
9f958ab8 TM |
288 | if (cred < sp->so_cred) |
289 | p = &parent->rb_left; | |
290 | else if (cred > sp->so_cred) | |
291 | p = &parent->rb_right; | |
292 | else { | |
293 | atomic_inc(&sp->so_count); | |
294 | res = sp; | |
295 | break; | |
296 | } | |
1da177e4 LT |
297 | } |
298 | return res; | |
299 | } | |
300 | ||
9f958ab8 TM |
301 | static struct nfs4_state_owner * |
302 | nfs4_insert_state_owner(struct nfs_client *clp, struct nfs4_state_owner *new) | |
303 | { | |
304 | struct rb_node **p = &clp->cl_state_owners.rb_node, | |
305 | *parent = NULL; | |
306 | struct nfs4_state_owner *sp; | |
307 | ||
308 | while (*p != NULL) { | |
309 | parent = *p; | |
310 | sp = rb_entry(parent, struct nfs4_state_owner, so_client_node); | |
311 | ||
6f2e64d3 TM |
312 | if (new->so_server < sp->so_server) { |
313 | p = &parent->rb_left; | |
314 | continue; | |
315 | } | |
316 | if (new->so_server > sp->so_server) { | |
317 | p = &parent->rb_right; | |
318 | continue; | |
319 | } | |
9f958ab8 TM |
320 | if (new->so_cred < sp->so_cred) |
321 | p = &parent->rb_left; | |
322 | else if (new->so_cred > sp->so_cred) | |
323 | p = &parent->rb_right; | |
324 | else { | |
325 | atomic_inc(&sp->so_count); | |
326 | return sp; | |
327 | } | |
328 | } | |
329 | nfs_alloc_unique_id(&clp->cl_openowner_id, &new->so_owner_id, 1, 64); | |
330 | rb_link_node(&new->so_client_node, parent, p); | |
331 | rb_insert_color(&new->so_client_node, &clp->cl_state_owners); | |
332 | return new; | |
333 | } | |
334 | ||
335 | static void | |
336 | nfs4_remove_state_owner(struct nfs_client *clp, struct nfs4_state_owner *sp) | |
337 | { | |
338 | if (!RB_EMPTY_NODE(&sp->so_client_node)) | |
339 | rb_erase(&sp->so_client_node, &clp->cl_state_owners); | |
340 | nfs_free_unique_id(&clp->cl_openowner_id, &sp->so_owner_id); | |
341 | } | |
342 | ||
1da177e4 LT |
343 | /* |
344 | * nfs4_alloc_state_owner(): this is called on the OPEN or CREATE path to | |
345 | * create a new state_owner. | |
346 | * | |
347 | */ | |
348 | static struct nfs4_state_owner * | |
349 | nfs4_alloc_state_owner(void) | |
350 | { | |
351 | struct nfs4_state_owner *sp; | |
352 | ||
cee54fc9 | 353 | sp = kzalloc(sizeof(*sp),GFP_KERNEL); |
1da177e4 LT |
354 | if (!sp) |
355 | return NULL; | |
ec073428 | 356 | spin_lock_init(&sp->so_lock); |
1da177e4 LT |
357 | INIT_LIST_HEAD(&sp->so_states); |
358 | INIT_LIST_HEAD(&sp->so_delegations); | |
cee54fc9 TM |
359 | rpc_init_wait_queue(&sp->so_sequence.wait, "Seqid_waitqueue"); |
360 | sp->so_seqid.sequence = &sp->so_sequence; | |
361 | spin_lock_init(&sp->so_sequence.lock); | |
362 | INIT_LIST_HEAD(&sp->so_sequence.list); | |
1da177e4 LT |
363 | atomic_set(&sp->so_count, 1); |
364 | return sp; | |
365 | } | |
366 | ||
1d2e88e7 | 367 | static void |
1da177e4 LT |
368 | nfs4_drop_state_owner(struct nfs4_state_owner *sp) |
369 | { | |
9f958ab8 TM |
370 | if (!RB_EMPTY_NODE(&sp->so_client_node)) { |
371 | struct nfs_client *clp = sp->so_client; | |
372 | ||
373 | spin_lock(&clp->cl_lock); | |
374 | rb_erase(&sp->so_client_node, &clp->cl_state_owners); | |
375 | RB_CLEAR_NODE(&sp->so_client_node); | |
376 | spin_unlock(&clp->cl_lock); | |
377 | } | |
1da177e4 LT |
378 | } |
379 | ||
1da177e4 LT |
380 | struct nfs4_state_owner *nfs4_get_state_owner(struct nfs_server *server, struct rpc_cred *cred) |
381 | { | |
7539bbab | 382 | struct nfs_client *clp = server->nfs_client; |
1da177e4 LT |
383 | struct nfs4_state_owner *sp, *new; |
384 | ||
1da177e4 | 385 | spin_lock(&clp->cl_lock); |
6f2e64d3 | 386 | sp = nfs4_find_state_owner(server, cred); |
1da177e4 | 387 | spin_unlock(&clp->cl_lock); |
1da177e4 LT |
388 | if (sp != NULL) |
389 | return sp; | |
9f958ab8 TM |
390 | new = nfs4_alloc_state_owner(); |
391 | if (new == NULL) | |
392 | return NULL; | |
393 | new->so_client = clp; | |
6f2e64d3 | 394 | new->so_server = server; |
9f958ab8 TM |
395 | new->so_cred = cred; |
396 | spin_lock(&clp->cl_lock); | |
397 | sp = nfs4_insert_state_owner(clp, new); | |
398 | spin_unlock(&clp->cl_lock); | |
399 | if (sp == new) | |
400 | get_rpccred(cred); | |
f6a1cc89 TM |
401 | else { |
402 | rpc_destroy_wait_queue(&new->so_sequence.wait); | |
9f958ab8 | 403 | kfree(new); |
f6a1cc89 | 404 | } |
9f958ab8 | 405 | return sp; |
1da177e4 LT |
406 | } |
407 | ||
1da177e4 LT |
408 | void nfs4_put_state_owner(struct nfs4_state_owner *sp) |
409 | { | |
adfa6f98 | 410 | struct nfs_client *clp = sp->so_client; |
1da177e4 LT |
411 | struct rpc_cred *cred = sp->so_cred; |
412 | ||
413 | if (!atomic_dec_and_lock(&sp->so_count, &clp->cl_lock)) | |
414 | return; | |
9f958ab8 | 415 | nfs4_remove_state_owner(clp, sp); |
1da177e4 | 416 | spin_unlock(&clp->cl_lock); |
f6a1cc89 | 417 | rpc_destroy_wait_queue(&sp->so_sequence.wait); |
1da177e4 LT |
418 | put_rpccred(cred); |
419 | kfree(sp); | |
420 | } | |
421 | ||
422 | static struct nfs4_state * | |
423 | nfs4_alloc_open_state(void) | |
424 | { | |
425 | struct nfs4_state *state; | |
426 | ||
e7616923 | 427 | state = kzalloc(sizeof(*state), GFP_KERNEL); |
1da177e4 LT |
428 | if (!state) |
429 | return NULL; | |
1da177e4 LT |
430 | atomic_set(&state->count, 1); |
431 | INIT_LIST_HEAD(&state->lock_states); | |
8d0a8a9d | 432 | spin_lock_init(&state->state_lock); |
8bda4e4c | 433 | seqlock_init(&state->seqlock); |
1da177e4 LT |
434 | return state; |
435 | } | |
436 | ||
4cecb76f | 437 | void |
dc0b027d | 438 | nfs4_state_set_mode_locked(struct nfs4_state *state, fmode_t fmode) |
4cecb76f | 439 | { |
dc0b027d | 440 | if (state->state == fmode) |
4cecb76f TM |
441 | return; |
442 | /* NB! List reordering - see the reclaim code for why. */ | |
dc0b027d TM |
443 | if ((fmode & FMODE_WRITE) != (state->state & FMODE_WRITE)) { |
444 | if (fmode & FMODE_WRITE) | |
4cecb76f TM |
445 | list_move(&state->open_states, &state->owner->so_states); |
446 | else | |
447 | list_move_tail(&state->open_states, &state->owner->so_states); | |
448 | } | |
dc0b027d | 449 | state->state = fmode; |
4cecb76f TM |
450 | } |
451 | ||
1da177e4 LT |
452 | static struct nfs4_state * |
453 | __nfs4_find_state_byowner(struct inode *inode, struct nfs4_state_owner *owner) | |
454 | { | |
455 | struct nfs_inode *nfsi = NFS_I(inode); | |
456 | struct nfs4_state *state; | |
457 | ||
458 | list_for_each_entry(state, &nfsi->open_states, inode_states) { | |
1c816efa | 459 | if (state->owner != owner) |
1da177e4 | 460 | continue; |
1c816efa | 461 | if (atomic_inc_not_zero(&state->count)) |
1da177e4 | 462 | return state; |
1da177e4 LT |
463 | } |
464 | return NULL; | |
465 | } | |
466 | ||
1da177e4 LT |
467 | static void |
468 | nfs4_free_open_state(struct nfs4_state *state) | |
469 | { | |
470 | kfree(state); | |
471 | } | |
472 | ||
473 | struct nfs4_state * | |
474 | nfs4_get_open_state(struct inode *inode, struct nfs4_state_owner *owner) | |
475 | { | |
476 | struct nfs4_state *state, *new; | |
477 | struct nfs_inode *nfsi = NFS_I(inode); | |
478 | ||
479 | spin_lock(&inode->i_lock); | |
480 | state = __nfs4_find_state_byowner(inode, owner); | |
481 | spin_unlock(&inode->i_lock); | |
482 | if (state) | |
483 | goto out; | |
484 | new = nfs4_alloc_open_state(); | |
ec073428 | 485 | spin_lock(&owner->so_lock); |
1da177e4 LT |
486 | spin_lock(&inode->i_lock); |
487 | state = __nfs4_find_state_byowner(inode, owner); | |
488 | if (state == NULL && new != NULL) { | |
489 | state = new; | |
1da177e4 LT |
490 | state->owner = owner; |
491 | atomic_inc(&owner->so_count); | |
492 | list_add(&state->inode_states, &nfsi->open_states); | |
493 | state->inode = igrab(inode); | |
494 | spin_unlock(&inode->i_lock); | |
ec073428 TM |
495 | /* Note: The reclaim code dictates that we add stateless |
496 | * and read-only stateids to the end of the list */ | |
497 | list_add_tail(&state->open_states, &owner->so_states); | |
498 | spin_unlock(&owner->so_lock); | |
1da177e4 LT |
499 | } else { |
500 | spin_unlock(&inode->i_lock); | |
ec073428 | 501 | spin_unlock(&owner->so_lock); |
1da177e4 LT |
502 | if (new) |
503 | nfs4_free_open_state(new); | |
504 | } | |
505 | out: | |
506 | return state; | |
507 | } | |
508 | ||
1da177e4 LT |
509 | void nfs4_put_open_state(struct nfs4_state *state) |
510 | { | |
511 | struct inode *inode = state->inode; | |
512 | struct nfs4_state_owner *owner = state->owner; | |
513 | ||
ec073428 | 514 | if (!atomic_dec_and_lock(&state->count, &owner->so_lock)) |
1da177e4 | 515 | return; |
ec073428 | 516 | spin_lock(&inode->i_lock); |
ba683031 | 517 | list_del(&state->inode_states); |
1da177e4 | 518 | list_del(&state->open_states); |
ec073428 TM |
519 | spin_unlock(&inode->i_lock); |
520 | spin_unlock(&owner->so_lock); | |
1da177e4 | 521 | iput(inode); |
1da177e4 LT |
522 | nfs4_free_open_state(state); |
523 | nfs4_put_state_owner(owner); | |
524 | } | |
525 | ||
526 | /* | |
83c9d41e | 527 | * Close the current file. |
1da177e4 | 528 | */ |
dc0b027d | 529 | static void __nfs4_close(struct path *path, struct nfs4_state *state, fmode_t fmode, int wait) |
1da177e4 | 530 | { |
1da177e4 | 531 | struct nfs4_state_owner *owner = state->owner; |
003707c7 | 532 | int call_close = 0; |
dc0b027d | 533 | fmode_t newstate; |
1da177e4 LT |
534 | |
535 | atomic_inc(&owner->so_count); | |
1da177e4 | 536 | /* Protect against nfs4_find_state() */ |
ec073428 | 537 | spin_lock(&owner->so_lock); |
dc0b027d | 538 | switch (fmode & (FMODE_READ | FMODE_WRITE)) { |
e7616923 TM |
539 | case FMODE_READ: |
540 | state->n_rdonly--; | |
541 | break; | |
542 | case FMODE_WRITE: | |
543 | state->n_wronly--; | |
544 | break; | |
545 | case FMODE_READ|FMODE_WRITE: | |
546 | state->n_rdwr--; | |
547 | } | |
003707c7 | 548 | newstate = FMODE_READ|FMODE_WRITE; |
e7616923 | 549 | if (state->n_rdwr == 0) { |
003707c7 | 550 | if (state->n_rdonly == 0) { |
e7616923 | 551 | newstate &= ~FMODE_READ; |
003707c7 TM |
552 | call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags); |
553 | call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); | |
554 | } | |
555 | if (state->n_wronly == 0) { | |
e7616923 | 556 | newstate &= ~FMODE_WRITE; |
003707c7 TM |
557 | call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags); |
558 | call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); | |
559 | } | |
560 | if (newstate == 0) | |
561 | clear_bit(NFS_DELEGATED_STATE, &state->flags); | |
e7616923 | 562 | } |
003707c7 | 563 | nfs4_state_set_mode_locked(state, newstate); |
ec073428 | 564 | spin_unlock(&owner->so_lock); |
4cecb76f | 565 | |
003707c7 | 566 | if (!call_close) { |
b39e625b TM |
567 | nfs4_put_open_state(state); |
568 | nfs4_put_state_owner(owner); | |
569 | } else | |
a49c3c77 TM |
570 | nfs4_do_close(path, state, wait); |
571 | } | |
572 | ||
dc0b027d | 573 | void nfs4_close_state(struct path *path, struct nfs4_state *state, fmode_t fmode) |
a49c3c77 | 574 | { |
dc0b027d | 575 | __nfs4_close(path, state, fmode, 0); |
a49c3c77 TM |
576 | } |
577 | ||
dc0b027d | 578 | void nfs4_close_sync(struct path *path, struct nfs4_state *state, fmode_t fmode) |
a49c3c77 | 579 | { |
dc0b027d | 580 | __nfs4_close(path, state, fmode, 1); |
1da177e4 LT |
581 | } |
582 | ||
583 | /* | |
584 | * Search the state->lock_states for an existing lock_owner | |
585 | * that is compatible with current->files | |
586 | */ | |
587 | static struct nfs4_lock_state * | |
588 | __nfs4_find_lock_state(struct nfs4_state *state, fl_owner_t fl_owner) | |
589 | { | |
590 | struct nfs4_lock_state *pos; | |
591 | list_for_each_entry(pos, &state->lock_states, ls_locks) { | |
592 | if (pos->ls_owner != fl_owner) | |
593 | continue; | |
594 | atomic_inc(&pos->ls_count); | |
595 | return pos; | |
596 | } | |
597 | return NULL; | |
598 | } | |
599 | ||
1da177e4 LT |
600 | /* |
601 | * Return a compatible lock_state. If no initialized lock_state structure | |
602 | * exists, return an uninitialized one. | |
603 | * | |
1da177e4 LT |
604 | */ |
605 | static struct nfs4_lock_state *nfs4_alloc_lock_state(struct nfs4_state *state, fl_owner_t fl_owner) | |
606 | { | |
607 | struct nfs4_lock_state *lsp; | |
adfa6f98 | 608 | struct nfs_client *clp = state->owner->so_client; |
1da177e4 | 609 | |
cee54fc9 | 610 | lsp = kzalloc(sizeof(*lsp), GFP_KERNEL); |
1da177e4 LT |
611 | if (lsp == NULL) |
612 | return NULL; | |
d0dc3701 TM |
613 | rpc_init_wait_queue(&lsp->ls_sequence.wait, "lock_seqid_waitqueue"); |
614 | spin_lock_init(&lsp->ls_sequence.lock); | |
615 | INIT_LIST_HEAD(&lsp->ls_sequence.list); | |
616 | lsp->ls_seqid.sequence = &lsp->ls_sequence; | |
1da177e4 | 617 | atomic_set(&lsp->ls_count, 1); |
b64aec8d | 618 | lsp->ls_state = state; |
1da177e4 | 619 | lsp->ls_owner = fl_owner; |
1da177e4 | 620 | spin_lock(&clp->cl_lock); |
9f958ab8 | 621 | nfs_alloc_unique_id(&clp->cl_lockowner_id, &lsp->ls_id, 1, 64); |
1da177e4 | 622 | spin_unlock(&clp->cl_lock); |
8d0a8a9d | 623 | INIT_LIST_HEAD(&lsp->ls_locks); |
1da177e4 LT |
624 | return lsp; |
625 | } | |
626 | ||
9f958ab8 TM |
627 | static void nfs4_free_lock_state(struct nfs4_lock_state *lsp) |
628 | { | |
629 | struct nfs_client *clp = lsp->ls_state->owner->so_client; | |
630 | ||
631 | spin_lock(&clp->cl_lock); | |
632 | nfs_free_unique_id(&clp->cl_lockowner_id, &lsp->ls_id); | |
633 | spin_unlock(&clp->cl_lock); | |
f6a1cc89 | 634 | rpc_destroy_wait_queue(&lsp->ls_sequence.wait); |
9f958ab8 TM |
635 | kfree(lsp); |
636 | } | |
637 | ||
1da177e4 LT |
638 | /* |
639 | * Return a compatible lock_state. If no initialized lock_state structure | |
640 | * exists, return an uninitialized one. | |
641 | * | |
1da177e4 | 642 | */ |
8d0a8a9d | 643 | static struct nfs4_lock_state *nfs4_get_lock_state(struct nfs4_state *state, fl_owner_t owner) |
1da177e4 | 644 | { |
8d0a8a9d | 645 | struct nfs4_lock_state *lsp, *new = NULL; |
1da177e4 | 646 | |
8d0a8a9d TM |
647 | for(;;) { |
648 | spin_lock(&state->state_lock); | |
649 | lsp = __nfs4_find_lock_state(state, owner); | |
650 | if (lsp != NULL) | |
651 | break; | |
652 | if (new != NULL) { | |
8d0a8a9d TM |
653 | list_add(&new->ls_locks, &state->lock_states); |
654 | set_bit(LK_STATE_IN_USE, &state->flags); | |
655 | lsp = new; | |
656 | new = NULL; | |
657 | break; | |
658 | } | |
659 | spin_unlock(&state->state_lock); | |
660 | new = nfs4_alloc_lock_state(state, owner); | |
661 | if (new == NULL) | |
662 | return NULL; | |
663 | } | |
664 | spin_unlock(&state->state_lock); | |
9f958ab8 TM |
665 | if (new != NULL) |
666 | nfs4_free_lock_state(new); | |
1da177e4 LT |
667 | return lsp; |
668 | } | |
669 | ||
670 | /* | |
8d0a8a9d TM |
671 | * Release reference to lock_state, and free it if we see that |
672 | * it is no longer in use | |
1da177e4 | 673 | */ |
faf5f49c | 674 | void nfs4_put_lock_state(struct nfs4_lock_state *lsp) |
1da177e4 | 675 | { |
8d0a8a9d | 676 | struct nfs4_state *state; |
1da177e4 | 677 | |
8d0a8a9d TM |
678 | if (lsp == NULL) |
679 | return; | |
680 | state = lsp->ls_state; | |
681 | if (!atomic_dec_and_lock(&lsp->ls_count, &state->state_lock)) | |
682 | return; | |
683 | list_del(&lsp->ls_locks); | |
684 | if (list_empty(&state->lock_states)) | |
685 | clear_bit(LK_STATE_IN_USE, &state->flags); | |
686 | spin_unlock(&state->state_lock); | |
9f958ab8 | 687 | nfs4_free_lock_state(lsp); |
1da177e4 LT |
688 | } |
689 | ||
8d0a8a9d | 690 | static void nfs4_fl_copy_lock(struct file_lock *dst, struct file_lock *src) |
1da177e4 | 691 | { |
8d0a8a9d | 692 | struct nfs4_lock_state *lsp = src->fl_u.nfs4_fl.owner; |
1da177e4 | 693 | |
8d0a8a9d TM |
694 | dst->fl_u.nfs4_fl.owner = lsp; |
695 | atomic_inc(&lsp->ls_count); | |
696 | } | |
1da177e4 | 697 | |
8d0a8a9d | 698 | static void nfs4_fl_release_lock(struct file_lock *fl) |
1da177e4 | 699 | { |
8d0a8a9d | 700 | nfs4_put_lock_state(fl->fl_u.nfs4_fl.owner); |
1da177e4 LT |
701 | } |
702 | ||
6aed6285 | 703 | static const struct file_lock_operations nfs4_fl_lock_ops = { |
8d0a8a9d TM |
704 | .fl_copy_lock = nfs4_fl_copy_lock, |
705 | .fl_release_private = nfs4_fl_release_lock, | |
706 | }; | |
707 | ||
708 | int nfs4_set_lock_state(struct nfs4_state *state, struct file_lock *fl) | |
1da177e4 | 709 | { |
8d0a8a9d TM |
710 | struct nfs4_lock_state *lsp; |
711 | ||
712 | if (fl->fl_ops != NULL) | |
713 | return 0; | |
714 | lsp = nfs4_get_lock_state(state, fl->fl_owner); | |
715 | if (lsp == NULL) | |
716 | return -ENOMEM; | |
717 | fl->fl_u.nfs4_fl.owner = lsp; | |
718 | fl->fl_ops = &nfs4_fl_lock_ops; | |
719 | return 0; | |
1da177e4 LT |
720 | } |
721 | ||
8d0a8a9d TM |
722 | /* |
723 | * Byte-range lock aware utility to initialize the stateid of read/write | |
724 | * requests. | |
1da177e4 | 725 | */ |
8d0a8a9d | 726 | void nfs4_copy_stateid(nfs4_stateid *dst, struct nfs4_state *state, fl_owner_t fl_owner) |
1da177e4 | 727 | { |
8d0a8a9d | 728 | struct nfs4_lock_state *lsp; |
8bda4e4c | 729 | int seq; |
1da177e4 | 730 | |
8bda4e4c TM |
731 | do { |
732 | seq = read_seqbegin(&state->seqlock); | |
733 | memcpy(dst, &state->stateid, sizeof(*dst)); | |
734 | } while (read_seqretry(&state->seqlock, seq)); | |
8d0a8a9d TM |
735 | if (test_bit(LK_STATE_IN_USE, &state->flags) == 0) |
736 | return; | |
1da177e4 | 737 | |
8d0a8a9d TM |
738 | spin_lock(&state->state_lock); |
739 | lsp = __nfs4_find_lock_state(state, fl_owner); | |
740 | if (lsp != NULL && (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0) | |
741 | memcpy(dst, &lsp->ls_stateid, sizeof(*dst)); | |
742 | spin_unlock(&state->state_lock); | |
1da177e4 LT |
743 | nfs4_put_lock_state(lsp); |
744 | } | |
745 | ||
cee54fc9 TM |
746 | struct nfs_seqid *nfs_alloc_seqid(struct nfs_seqid_counter *counter) |
747 | { | |
cee54fc9 TM |
748 | struct nfs_seqid *new; |
749 | ||
750 | new = kmalloc(sizeof(*new), GFP_KERNEL); | |
751 | if (new != NULL) { | |
752 | new->sequence = counter; | |
2f74c0a0 | 753 | INIT_LIST_HEAD(&new->list); |
cee54fc9 TM |
754 | } |
755 | return new; | |
756 | } | |
757 | ||
758 | void nfs_free_seqid(struct nfs_seqid *seqid) | |
1da177e4 | 759 | { |
2f74c0a0 TM |
760 | if (!list_empty(&seqid->list)) { |
761 | struct rpc_sequence *sequence = seqid->sequence->sequence; | |
cee54fc9 | 762 | |
2f74c0a0 TM |
763 | spin_lock(&sequence->lock); |
764 | list_del(&seqid->list); | |
765 | spin_unlock(&sequence->lock); | |
766 | rpc_wake_up(&sequence->wait); | |
767 | } | |
cee54fc9 | 768 | kfree(seqid); |
1da177e4 LT |
769 | } |
770 | ||
771 | /* | |
cee54fc9 TM |
772 | * Increment the seqid if the OPEN/OPEN_DOWNGRADE/CLOSE succeeded, or |
773 | * failed with a seqid incrementing error - | |
774 | * see comments nfs_fs.h:seqid_mutating_error() | |
775 | */ | |
88d90939 | 776 | static void nfs_increment_seqid(int status, struct nfs_seqid *seqid) |
cee54fc9 | 777 | { |
2f74c0a0 | 778 | BUG_ON(list_first_entry(&seqid->sequence->sequence->list, struct nfs_seqid, list) != seqid); |
cee54fc9 TM |
779 | switch (status) { |
780 | case 0: | |
781 | break; | |
782 | case -NFS4ERR_BAD_SEQID: | |
6f43ddcc TM |
783 | if (seqid->sequence->flags & NFS_SEQID_CONFIRMED) |
784 | return; | |
785 | printk(KERN_WARNING "NFS: v4 server returned a bad" | |
497799e7 DM |
786 | " sequence-id error on an" |
787 | " unconfirmed sequence %p!\n", | |
6f43ddcc | 788 | seqid->sequence); |
cee54fc9 TM |
789 | case -NFS4ERR_STALE_CLIENTID: |
790 | case -NFS4ERR_STALE_STATEID: | |
791 | case -NFS4ERR_BAD_STATEID: | |
792 | case -NFS4ERR_BADXDR: | |
793 | case -NFS4ERR_RESOURCE: | |
794 | case -NFS4ERR_NOFILEHANDLE: | |
795 | /* Non-seqid mutating errors */ | |
796 | return; | |
797 | }; | |
798 | /* | |
799 | * Note: no locking needed as we are guaranteed to be first | |
800 | * on the sequence list | |
801 | */ | |
802 | seqid->sequence->counter++; | |
803 | } | |
804 | ||
805 | void nfs_increment_open_seqid(int status, struct nfs_seqid *seqid) | |
806 | { | |
34dc1ad7 BH |
807 | struct nfs4_state_owner *sp = container_of(seqid->sequence, |
808 | struct nfs4_state_owner, so_seqid); | |
809 | struct nfs_server *server = sp->so_server; | |
810 | ||
811 | if (status == -NFS4ERR_BAD_SEQID) | |
1da177e4 | 812 | nfs4_drop_state_owner(sp); |
34dc1ad7 BH |
813 | if (!nfs4_has_session(server->nfs_client)) |
814 | nfs_increment_seqid(status, seqid); | |
cee54fc9 TM |
815 | } |
816 | ||
817 | /* | |
cee54fc9 TM |
818 | * Increment the seqid if the LOCK/LOCKU succeeded, or |
819 | * failed with a seqid incrementing error - | |
820 | * see comments nfs_fs.h:seqid_mutating_error() | |
821 | */ | |
822 | void nfs_increment_lock_seqid(int status, struct nfs_seqid *seqid) | |
823 | { | |
88d90939 | 824 | nfs_increment_seqid(status, seqid); |
cee54fc9 TM |
825 | } |
826 | ||
827 | int nfs_wait_on_sequence(struct nfs_seqid *seqid, struct rpc_task *task) | |
828 | { | |
829 | struct rpc_sequence *sequence = seqid->sequence->sequence; | |
830 | int status = 0; | |
831 | ||
832 | spin_lock(&sequence->lock); | |
2f74c0a0 TM |
833 | if (list_empty(&seqid->list)) |
834 | list_add_tail(&seqid->list, &sequence->list); | |
835 | if (list_first_entry(&sequence->list, struct nfs_seqid, list) == seqid) | |
836 | goto unlock; | |
5d00837b | 837 | rpc_sleep_on(&sequence->wait, task, NULL); |
2f74c0a0 TM |
838 | status = -EAGAIN; |
839 | unlock: | |
cee54fc9 TM |
840 | spin_unlock(&sequence->lock); |
841 | return status; | |
1da177e4 LT |
842 | } |
843 | ||
e005e804 | 844 | static int nfs4_run_state_manager(void *); |
1da177e4 | 845 | |
e005e804 | 846 | static void nfs4_clear_state_manager_bit(struct nfs_client *clp) |
433fbe4c TM |
847 | { |
848 | smp_mb__before_clear_bit(); | |
e005e804 | 849 | clear_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state); |
433fbe4c | 850 | smp_mb__after_clear_bit(); |
e005e804 | 851 | wake_up_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING); |
433fbe4c TM |
852 | rpc_wake_up(&clp->cl_rpcwaitq); |
853 | } | |
854 | ||
1da177e4 | 855 | /* |
e005e804 | 856 | * Schedule the nfs_client asynchronous state management routine |
1da177e4 | 857 | */ |
b0d3ded1 | 858 | void nfs4_schedule_state_manager(struct nfs_client *clp) |
1da177e4 | 859 | { |
5043e900 | 860 | struct task_struct *task; |
1da177e4 | 861 | |
e005e804 TM |
862 | if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) != 0) |
863 | return; | |
5043e900 TM |
864 | __module_get(THIS_MODULE); |
865 | atomic_inc(&clp->cl_count); | |
e005e804 | 866 | task = kthread_run(nfs4_run_state_manager, clp, "%s-manager", |
5d8515ca CL |
867 | rpc_peeraddr2str(clp->cl_rpcclient, |
868 | RPC_DISPLAY_ADDR)); | |
5043e900 TM |
869 | if (!IS_ERR(task)) |
870 | return; | |
e005e804 | 871 | nfs4_clear_state_manager_bit(clp); |
24c8dbbb | 872 | nfs_put_client(clp); |
5043e900 | 873 | module_put(THIS_MODULE); |
1da177e4 LT |
874 | } |
875 | ||
876 | /* | |
877 | * Schedule a state recovery attempt | |
878 | */ | |
adfa6f98 | 879 | void nfs4_schedule_state_recovery(struct nfs_client *clp) |
1da177e4 LT |
880 | { |
881 | if (!clp) | |
882 | return; | |
e598d843 TM |
883 | if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
884 | set_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); | |
e005e804 | 885 | nfs4_schedule_state_manager(clp); |
1da177e4 LT |
886 | } |
887 | ||
b79a4a1b TM |
888 | static int nfs4_state_mark_reclaim_reboot(struct nfs_client *clp, struct nfs4_state *state) |
889 | { | |
890 | ||
891 | set_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); | |
892 | /* Don't recover state that expired before the reboot */ | |
893 | if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) { | |
894 | clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); | |
895 | return 0; | |
896 | } | |
7eff03ae | 897 | set_bit(NFS_OWNER_RECLAIM_REBOOT, &state->owner->so_flags); |
b79a4a1b TM |
898 | set_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state); |
899 | return 1; | |
900 | } | |
901 | ||
9e33bed5 | 902 | int nfs4_state_mark_reclaim_nograce(struct nfs_client *clp, struct nfs4_state *state) |
b79a4a1b TM |
903 | { |
904 | set_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags); | |
905 | clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); | |
7eff03ae | 906 | set_bit(NFS_OWNER_RECLAIM_NOGRACE, &state->owner->so_flags); |
b79a4a1b TM |
907 | set_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state); |
908 | return 1; | |
909 | } | |
910 | ||
02860014 | 911 | static int nfs4_reclaim_locks(struct nfs4_state *state, const struct nfs4_state_recovery_ops *ops) |
1da177e4 LT |
912 | { |
913 | struct inode *inode = state->inode; | |
19e03c57 | 914 | struct nfs_inode *nfsi = NFS_I(inode); |
1da177e4 LT |
915 | struct file_lock *fl; |
916 | int status = 0; | |
917 | ||
3f09df70 TM |
918 | if (inode->i_flock == NULL) |
919 | return 0; | |
920 | ||
921 | /* Guard against delegation returns and new lock/unlock calls */ | |
19e03c57 | 922 | down_write(&nfsi->rwsem); |
3f09df70 TM |
923 | /* Protect inode->i_flock using the BKL */ |
924 | lock_kernel(); | |
90dc7d27 | 925 | for (fl = inode->i_flock; fl != NULL; fl = fl->fl_next) { |
43b2a33a | 926 | if (!(fl->fl_flags & (FL_POSIX|FL_FLOCK))) |
1da177e4 | 927 | continue; |
cd3758e3 | 928 | if (nfs_file_open_context(fl->fl_file)->state != state) |
1da177e4 | 929 | continue; |
3f09df70 | 930 | unlock_kernel(); |
1da177e4 | 931 | status = ops->recover_lock(state, fl); |
1da177e4 | 932 | switch (status) { |
965b5d67 TM |
933 | case 0: |
934 | break; | |
935 | case -ESTALE: | |
936 | case -NFS4ERR_ADMIN_REVOKED: | |
937 | case -NFS4ERR_STALE_STATEID: | |
938 | case -NFS4ERR_BAD_STATEID: | |
939 | case -NFS4ERR_EXPIRED: | |
940 | case -NFS4ERR_NO_GRACE: | |
941 | case -NFS4ERR_STALE_CLIENTID: | |
9c4c761a TM |
942 | case -NFS4ERR_BADSESSION: |
943 | case -NFS4ERR_BADSLOT: | |
944 | case -NFS4ERR_BAD_HIGH_SLOT: | |
945 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
965b5d67 | 946 | goto out; |
1da177e4 LT |
947 | default: |
948 | printk(KERN_ERR "%s: unhandled error %d. Zeroing state\n", | |
3110ff80 | 949 | __func__, status); |
965b5d67 TM |
950 | case -ENOMEM: |
951 | case -NFS4ERR_DENIED: | |
1da177e4 LT |
952 | case -NFS4ERR_RECLAIM_BAD: |
953 | case -NFS4ERR_RECLAIM_CONFLICT: | |
43b2a33a | 954 | /* kill_proc(fl->fl_pid, SIGLOST, 1); */ |
965b5d67 | 955 | status = 0; |
1da177e4 | 956 | } |
3f09df70 | 957 | lock_kernel(); |
1da177e4 | 958 | } |
3f09df70 | 959 | unlock_kernel(); |
965b5d67 | 960 | out: |
19e03c57 | 961 | up_write(&nfsi->rwsem); |
1da177e4 LT |
962 | return status; |
963 | } | |
964 | ||
02860014 | 965 | static int nfs4_reclaim_open_state(struct nfs4_state_owner *sp, const struct nfs4_state_recovery_ops *ops) |
1da177e4 LT |
966 | { |
967 | struct nfs4_state *state; | |
968 | struct nfs4_lock_state *lock; | |
969 | int status = 0; | |
970 | ||
971 | /* Note: we rely on the sp->so_states list being ordered | |
972 | * so that we always reclaim open(O_RDWR) and/or open(O_WRITE) | |
973 | * states first. | |
974 | * This is needed to ensure that the server won't give us any | |
975 | * read delegations that we have to return if, say, we are | |
976 | * recovering after a network partition or a reboot from a | |
977 | * server that doesn't support a grace period. | |
978 | */ | |
fe1d8195 TM |
979 | restart: |
980 | spin_lock(&sp->so_lock); | |
1da177e4 | 981 | list_for_each_entry(state, &sp->so_states, open_states) { |
b79a4a1b TM |
982 | if (!test_and_clear_bit(ops->state_flag_bit, &state->flags)) |
983 | continue; | |
1da177e4 LT |
984 | if (state->state == 0) |
985 | continue; | |
fe1d8195 TM |
986 | atomic_inc(&state->count); |
987 | spin_unlock(&sp->so_lock); | |
1da177e4 | 988 | status = ops->recover_open(sp, state); |
1da177e4 | 989 | if (status >= 0) { |
02860014 TM |
990 | status = nfs4_reclaim_locks(state, ops); |
991 | if (status >= 0) { | |
992 | list_for_each_entry(lock, &state->lock_states, ls_locks) { | |
993 | if (!(lock->ls_flags & NFS_LOCK_INITIALIZED)) | |
994 | printk("%s: Lock reclaim failed!\n", | |
3110ff80 | 995 | __func__); |
02860014 | 996 | } |
fe1d8195 TM |
997 | nfs4_put_open_state(state); |
998 | goto restart; | |
1da177e4 | 999 | } |
1da177e4 LT |
1000 | } |
1001 | switch (status) { | |
1002 | default: | |
1003 | printk(KERN_ERR "%s: unhandled error %d. Zeroing state\n", | |
3110ff80 | 1004 | __func__, status); |
1da177e4 | 1005 | case -ENOENT: |
965b5d67 | 1006 | case -ENOMEM: |
b79a4a1b | 1007 | case -ESTALE: |
1da177e4 LT |
1008 | /* |
1009 | * Open state on this file cannot be recovered | |
1010 | * All we can do is revert to using the zero stateid. | |
1011 | */ | |
1012 | memset(state->stateid.data, 0, | |
1013 | sizeof(state->stateid.data)); | |
1014 | /* Mark the file as being 'closed' */ | |
1015 | state->state = 0; | |
1016 | break; | |
965b5d67 TM |
1017 | case -NFS4ERR_ADMIN_REVOKED: |
1018 | case -NFS4ERR_STALE_STATEID: | |
1019 | case -NFS4ERR_BAD_STATEID: | |
b79a4a1b TM |
1020 | case -NFS4ERR_RECLAIM_BAD: |
1021 | case -NFS4ERR_RECLAIM_CONFLICT: | |
1022 | nfs4_state_mark_reclaim_nograce(sp->so_client, state); | |
1023 | break; | |
1da177e4 LT |
1024 | case -NFS4ERR_EXPIRED: |
1025 | case -NFS4ERR_NO_GRACE: | |
b79a4a1b | 1026 | nfs4_state_mark_reclaim_nograce(sp->so_client, state); |
1da177e4 | 1027 | case -NFS4ERR_STALE_CLIENTID: |
9c4c761a TM |
1028 | case -NFS4ERR_BADSESSION: |
1029 | case -NFS4ERR_BADSLOT: | |
1030 | case -NFS4ERR_BAD_HIGH_SLOT: | |
1031 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
1da177e4 LT |
1032 | goto out_err; |
1033 | } | |
fe1d8195 TM |
1034 | nfs4_put_open_state(state); |
1035 | goto restart; | |
1da177e4 | 1036 | } |
fe1d8195 | 1037 | spin_unlock(&sp->so_lock); |
1da177e4 LT |
1038 | return 0; |
1039 | out_err: | |
fe1d8195 | 1040 | nfs4_put_open_state(state); |
1da177e4 LT |
1041 | return status; |
1042 | } | |
1043 | ||
b79a4a1b TM |
1044 | static void nfs4_clear_open_state(struct nfs4_state *state) |
1045 | { | |
1046 | struct nfs4_lock_state *lock; | |
1047 | ||
1048 | clear_bit(NFS_DELEGATED_STATE, &state->flags); | |
1049 | clear_bit(NFS_O_RDONLY_STATE, &state->flags); | |
1050 | clear_bit(NFS_O_WRONLY_STATE, &state->flags); | |
1051 | clear_bit(NFS_O_RDWR_STATE, &state->flags); | |
1052 | list_for_each_entry(lock, &state->lock_states, ls_locks) { | |
b79a4a1b TM |
1053 | lock->ls_seqid.flags = 0; |
1054 | lock->ls_flags &= ~NFS_LOCK_INITIALIZED; | |
1055 | } | |
1056 | } | |
1057 | ||
1058 | static void nfs4_state_mark_reclaim_helper(struct nfs_client *clp, int (*mark_reclaim)(struct nfs_client *clp, struct nfs4_state *state)) | |
cee54fc9 TM |
1059 | { |
1060 | struct nfs4_state_owner *sp; | |
9f958ab8 | 1061 | struct rb_node *pos; |
cee54fc9 | 1062 | struct nfs4_state *state; |
cee54fc9 TM |
1063 | |
1064 | /* Reset all sequence ids to zero */ | |
9f958ab8 TM |
1065 | for (pos = rb_first(&clp->cl_state_owners); pos != NULL; pos = rb_next(pos)) { |
1066 | sp = rb_entry(pos, struct nfs4_state_owner, so_client_node); | |
cee54fc9 | 1067 | sp->so_seqid.flags = 0; |
ec073428 | 1068 | spin_lock(&sp->so_lock); |
cee54fc9 | 1069 | list_for_each_entry(state, &sp->so_states, open_states) { |
b79a4a1b TM |
1070 | if (mark_reclaim(clp, state)) |
1071 | nfs4_clear_open_state(state); | |
cee54fc9 | 1072 | } |
ec073428 | 1073 | spin_unlock(&sp->so_lock); |
cee54fc9 TM |
1074 | } |
1075 | } | |
1076 | ||
b79a4a1b TM |
1077 | static void nfs4_state_start_reclaim_reboot(struct nfs_client *clp) |
1078 | { | |
1079 | /* Mark all delegations for reclaim */ | |
1080 | nfs_delegation_mark_reclaim(clp); | |
1081 | nfs4_state_mark_reclaim_helper(clp, nfs4_state_mark_reclaim_reboot); | |
1082 | } | |
1083 | ||
fce5c838 RL |
1084 | static void nfs4_reclaim_complete(struct nfs_client *clp, |
1085 | const struct nfs4_state_recovery_ops *ops) | |
1086 | { | |
1087 | /* Notify the server we're done reclaiming our state */ | |
1088 | if (ops->reclaim_complete) | |
1089 | (void)ops->reclaim_complete(clp); | |
1090 | } | |
1091 | ||
b79a4a1b TM |
1092 | static void nfs4_state_end_reclaim_reboot(struct nfs_client *clp) |
1093 | { | |
1094 | struct nfs4_state_owner *sp; | |
1095 | struct rb_node *pos; | |
1096 | struct nfs4_state *state; | |
1097 | ||
1098 | if (!test_and_clear_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) | |
1099 | return; | |
1100 | ||
7cab89b2 RL |
1101 | nfs4_reclaim_complete(clp, |
1102 | nfs4_reboot_recovery_ops[clp->cl_minorversion]); | |
1103 | ||
b79a4a1b TM |
1104 | for (pos = rb_first(&clp->cl_state_owners); pos != NULL; pos = rb_next(pos)) { |
1105 | sp = rb_entry(pos, struct nfs4_state_owner, so_client_node); | |
1106 | spin_lock(&sp->so_lock); | |
1107 | list_for_each_entry(state, &sp->so_states, open_states) { | |
1108 | if (!test_and_clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags)) | |
1109 | continue; | |
1110 | nfs4_state_mark_reclaim_nograce(clp, state); | |
1111 | } | |
1112 | spin_unlock(&sp->so_lock); | |
1113 | } | |
1114 | ||
1115 | nfs_delegation_reap_unclaimed(clp); | |
1116 | } | |
1117 | ||
1118 | static void nfs_delegation_clear_all(struct nfs_client *clp) | |
1119 | { | |
1120 | nfs_delegation_mark_reclaim(clp); | |
1121 | nfs_delegation_reap_unclaimed(clp); | |
1122 | } | |
1123 | ||
1124 | static void nfs4_state_start_reclaim_nograce(struct nfs_client *clp) | |
1125 | { | |
1126 | nfs_delegation_clear_all(clp); | |
1127 | nfs4_state_mark_reclaim_helper(clp, nfs4_state_mark_reclaim_nograce); | |
1128 | } | |
1129 | ||
4f7cdf18 | 1130 | static int nfs4_recovery_handle_error(struct nfs_client *clp, int error) |
e598d843 TM |
1131 | { |
1132 | switch (error) { | |
1133 | case -NFS4ERR_CB_PATH_DOWN: | |
707fb4b3 | 1134 | nfs_handle_cb_pathdown(clp); |
4f7cdf18 | 1135 | return 0; |
c8b7ae3d TM |
1136 | case -NFS4ERR_NO_GRACE: |
1137 | nfs4_state_end_reclaim_reboot(clp); | |
1138 | return 0; | |
e598d843 TM |
1139 | case -NFS4ERR_STALE_CLIENTID: |
1140 | case -NFS4ERR_LEASE_MOVED: | |
1141 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
e345e88a | 1142 | nfs4_state_end_reclaim_reboot(clp); |
e598d843 TM |
1143 | nfs4_state_start_reclaim_reboot(clp); |
1144 | break; | |
1145 | case -NFS4ERR_EXPIRED: | |
1146 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1147 | nfs4_state_start_reclaim_nograce(clp); | |
8ba9bf8e | 1148 | break; |
c3fad1b1 AA |
1149 | case -NFS4ERR_BADSESSION: |
1150 | case -NFS4ERR_BADSLOT: | |
1151 | case -NFS4ERR_BAD_HIGH_SLOT: | |
1152 | case -NFS4ERR_DEADSESSION: | |
1153 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
1154 | case -NFS4ERR_SEQ_FALSE_RETRY: | |
1155 | case -NFS4ERR_SEQ_MISORDERED: | |
6df08189 | 1156 | set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); |
0b9e2d41 AA |
1157 | /* Zero session reset errors */ |
1158 | return 0; | |
e598d843 | 1159 | } |
4f7cdf18 | 1160 | return error; |
e598d843 TM |
1161 | } |
1162 | ||
02860014 | 1163 | static int nfs4_do_reclaim(struct nfs_client *clp, const struct nfs4_state_recovery_ops *ops) |
1da177e4 | 1164 | { |
9f958ab8 | 1165 | struct rb_node *pos; |
1da177e4 LT |
1166 | int status = 0; |
1167 | ||
7eff03ae TM |
1168 | restart: |
1169 | spin_lock(&clp->cl_lock); | |
02860014 TM |
1170 | for (pos = rb_first(&clp->cl_state_owners); pos != NULL; pos = rb_next(pos)) { |
1171 | struct nfs4_state_owner *sp = rb_entry(pos, struct nfs4_state_owner, so_client_node); | |
7eff03ae TM |
1172 | if (!test_and_clear_bit(ops->owner_flag_bit, &sp->so_flags)) |
1173 | continue; | |
1174 | atomic_inc(&sp->so_count); | |
1175 | spin_unlock(&clp->cl_lock); | |
02860014 | 1176 | status = nfs4_reclaim_open_state(sp, ops); |
7eff03ae TM |
1177 | if (status < 0) { |
1178 | set_bit(ops->owner_flag_bit, &sp->so_flags); | |
1179 | nfs4_put_state_owner(sp); | |
4f7cdf18 | 1180 | return nfs4_recovery_handle_error(clp, status); |
7eff03ae TM |
1181 | } |
1182 | nfs4_put_state_owner(sp); | |
1183 | goto restart; | |
02860014 | 1184 | } |
7eff03ae | 1185 | spin_unlock(&clp->cl_lock); |
02860014 TM |
1186 | return status; |
1187 | } | |
1188 | ||
1189 | static int nfs4_check_lease(struct nfs_client *clp) | |
1190 | { | |
1191 | struct rpc_cred *cred; | |
8e69514f BH |
1192 | struct nfs4_state_maintenance_ops *ops = |
1193 | nfs4_state_renewal_ops[clp->cl_minorversion]; | |
02860014 | 1194 | int status = -NFS4ERR_EXPIRED; |
1da177e4 | 1195 | |
0f605b56 TM |
1196 | /* Is the client already known to have an expired lease? */ |
1197 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) | |
1198 | return 0; | |
a7b72103 AA |
1199 | spin_lock(&clp->cl_lock); |
1200 | cred = ops->get_state_renewal_cred_locked(clp); | |
1201 | spin_unlock(&clp->cl_lock); | |
0f605b56 TM |
1202 | if (cred == NULL) { |
1203 | cred = nfs4_get_setclientid_cred(clp); | |
1204 | if (cred == NULL) | |
1205 | goto out; | |
286d7d6a | 1206 | } |
8e69514f | 1207 | status = ops->renew_lease(clp, cred); |
0f605b56 TM |
1208 | put_rpccred(cred); |
1209 | out: | |
4f7cdf18 | 1210 | return nfs4_recovery_handle_error(clp, status); |
02860014 TM |
1211 | } |
1212 | ||
1213 | static int nfs4_reclaim_lease(struct nfs_client *clp) | |
1214 | { | |
1215 | struct rpc_cred *cred; | |
591d71cb AA |
1216 | struct nfs4_state_recovery_ops *ops = |
1217 | nfs4_reboot_recovery_ops[clp->cl_minorversion]; | |
02860014 TM |
1218 | int status = -ENOENT; |
1219 | ||
90a16617 | 1220 | cred = ops->get_clid_cred(clp); |
286d7d6a | 1221 | if (cred != NULL) { |
591d71cb | 1222 | status = ops->establish_clid(clp, cred); |
286d7d6a | 1223 | put_rpccred(cred); |
a2b2bb88 TM |
1224 | /* Handle case where the user hasn't set up machine creds */ |
1225 | if (status == -EACCES && cred == clp->cl_machine_cred) { | |
1226 | nfs4_clear_machine_cred(clp); | |
02860014 | 1227 | status = -EAGAIN; |
a2b2bb88 | 1228 | } |
c2e713dd BH |
1229 | if (status == -NFS4ERR_MINOR_VERS_MISMATCH) |
1230 | status = -EPROTONOSUPPORT; | |
286d7d6a | 1231 | } |
02860014 TM |
1232 | return status; |
1233 | } | |
1234 | ||
76db6d95 | 1235 | #ifdef CONFIG_NFS_V4_1 |
0629e370 AB |
1236 | void nfs41_handle_sequence_flag_errors(struct nfs_client *clp, u32 flags) |
1237 | { | |
1238 | if (!flags) | |
1239 | return; | |
1240 | else if (flags & SEQ4_STATUS_RESTART_RECLAIM_NEEDED) { | |
1241 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1242 | nfs4_state_start_reclaim_reboot(clp); | |
1243 | nfs4_schedule_state_recovery(clp); | |
1244 | } else if (flags & (SEQ4_STATUS_EXPIRED_ALL_STATE_REVOKED | | |
1245 | SEQ4_STATUS_EXPIRED_SOME_STATE_REVOKED | | |
1246 | SEQ4_STATUS_ADMIN_STATE_REVOKED | | |
1247 | SEQ4_STATUS_RECALLABLE_STATE_REVOKED | | |
1248 | SEQ4_STATUS_LEASE_MOVED)) { | |
1249 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1250 | nfs4_state_start_reclaim_nograce(clp); | |
1251 | nfs4_schedule_state_recovery(clp); | |
1252 | } else if (flags & (SEQ4_STATUS_CB_PATH_DOWN | | |
1253 | SEQ4_STATUS_BACKCHANNEL_FAULT | | |
1254 | SEQ4_STATUS_CB_PATH_DOWN_SESSION)) | |
1255 | nfs_expire_all_delegations(clp); | |
1256 | } | |
1257 | ||
c3fad1b1 AA |
1258 | static int nfs4_reset_session(struct nfs_client *clp) |
1259 | { | |
ea028ac9 | 1260 | struct nfs4_session *ses = clp->cl_session; |
c3fad1b1 AA |
1261 | int status; |
1262 | ||
9dfdf404 RL |
1263 | status = nfs41_begin_drain_session(clp, ses); |
1264 | if (status != 0) | |
1265 | return status; | |
ea028ac9 | 1266 | |
c3fad1b1 AA |
1267 | status = nfs4_proc_destroy_session(clp->cl_session); |
1268 | if (status && status != -NFS4ERR_BADSESSION && | |
1269 | status != -NFS4ERR_DEADSESSION) { | |
f455848a | 1270 | status = nfs4_recovery_handle_error(clp, status); |
c3fad1b1 AA |
1271 | goto out; |
1272 | } | |
1273 | ||
1274 | memset(clp->cl_session->sess_id.data, 0, NFS4_MAX_SESSIONID_LEN); | |
f26468fb | 1275 | status = nfs4_proc_create_session(clp); |
c3fad1b1 | 1276 | if (status) |
f455848a | 1277 | status = nfs4_recovery_handle_error(clp, status); |
9dfdf404 | 1278 | |
c3fad1b1 | 1279 | out: |
9dfdf404 RL |
1280 | /* |
1281 | * Let the state manager reestablish state | |
1282 | * without waking other tasks yet. | |
1283 | */ | |
1284 | if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) { | |
1285 | /* Wake up the next rpc task */ | |
1286 | nfs41_end_drain_session(clp, ses); | |
1287 | if (status == 0) | |
1288 | nfs41_setup_state_renewal(clp); | |
1289 | } | |
c3fad1b1 AA |
1290 | return status; |
1291 | } | |
76db6d95 | 1292 | |
76db6d95 | 1293 | #else /* CONFIG_NFS_V4_1 */ |
c3fad1b1 | 1294 | static int nfs4_reset_session(struct nfs_client *clp) { return 0; } |
76db6d95 AA |
1295 | #endif /* CONFIG_NFS_V4_1 */ |
1296 | ||
78722e9c AA |
1297 | /* Set NFS4CLNT_LEASE_EXPIRED for all v4.0 errors and for recoverable errors |
1298 | * on EXCHANGE_ID for v4.1 | |
1299 | */ | |
1300 | static void nfs4_set_lease_expired(struct nfs_client *clp, int status) | |
1301 | { | |
1302 | if (nfs4_has_session(clp)) { | |
1303 | switch (status) { | |
1304 | case -NFS4ERR_DELAY: | |
1305 | case -NFS4ERR_CLID_INUSE: | |
1306 | case -EAGAIN: | |
1307 | break; | |
1308 | ||
1309 | case -NFS4ERR_NOT_SAME: /* FixMe: implement recovery | |
1310 | * in nfs4_exchange_id */ | |
1311 | default: | |
1312 | return; | |
1313 | } | |
1314 | } | |
1315 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1316 | } | |
1317 | ||
e005e804 | 1318 | static void nfs4_state_manager(struct nfs_client *clp) |
02860014 | 1319 | { |
02860014 TM |
1320 | int status = 0; |
1321 | ||
02860014 | 1322 | /* Ensure exclusive access to NFSv4 state */ |
f3c76491 | 1323 | for(;;) { |
b79a4a1b TM |
1324 | if (test_and_clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) { |
1325 | /* We're going to have to re-establish a clientid */ | |
1326 | status = nfs4_reclaim_lease(clp); | |
1327 | if (status) { | |
78722e9c | 1328 | nfs4_set_lease_expired(clp, status); |
b6d408ba TM |
1329 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, |
1330 | &clp->cl_state)) | |
b79a4a1b | 1331 | continue; |
76db6d95 AA |
1332 | if (clp->cl_cons_state == |
1333 | NFS_CS_SESSION_INITING) | |
1334 | nfs_mark_client_ready(clp, status); | |
b79a4a1b TM |
1335 | goto out_error; |
1336 | } | |
e598d843 | 1337 | clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); |
7cab89b2 | 1338 | set_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state); |
e598d843 TM |
1339 | } |
1340 | ||
1341 | if (test_and_clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state)) { | |
1342 | status = nfs4_check_lease(clp); | |
b6d408ba | 1343 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
e598d843 | 1344 | continue; |
b6d408ba TM |
1345 | if (status < 0 && status != -NFS4ERR_CB_PATH_DOWN) |
1346 | goto out_error; | |
b79a4a1b | 1347 | } |
b6d408ba | 1348 | |
c3fad1b1 | 1349 | /* Initialize or reset the session */ |
6df08189 | 1350 | if (test_and_clear_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state) |
7111dc73 | 1351 | && nfs4_has_session(clp)) { |
4d643d1d | 1352 | status = nfs4_reset_session(clp); |
b6d408ba TM |
1353 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
1354 | continue; | |
1355 | if (status < 0) | |
76db6d95 | 1356 | goto out_error; |
76db6d95 | 1357 | } |
b6d408ba | 1358 | |
b79a4a1b | 1359 | /* First recover reboot state... */ |
e345e88a | 1360 | if (test_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) { |
591d71cb AA |
1361 | status = nfs4_do_reclaim(clp, |
1362 | nfs4_reboot_recovery_ops[clp->cl_minorversion]); | |
b6d408ba | 1363 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) || |
6df08189 | 1364 | test_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state)) |
c3fad1b1 | 1365 | continue; |
b79a4a1b | 1366 | nfs4_state_end_reclaim_reboot(clp); |
b6d408ba TM |
1367 | if (test_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) |
1368 | continue; | |
1369 | if (status < 0) | |
1370 | goto out_error; | |
02860014 TM |
1371 | } |
1372 | ||
b79a4a1b TM |
1373 | /* Now recover expired state... */ |
1374 | if (test_and_clear_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) { | |
591d71cb AA |
1375 | status = nfs4_do_reclaim(clp, |
1376 | nfs4_nograce_recovery_ops[clp->cl_minorversion]); | |
b6d408ba | 1377 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) || |
6df08189 | 1378 | test_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state) || |
b6d408ba TM |
1379 | test_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) |
1380 | continue; | |
1381 | if (status < 0) | |
b79a4a1b | 1382 | goto out_error; |
1da177e4 | 1383 | } |
707fb4b3 TM |
1384 | |
1385 | if (test_and_clear_bit(NFS4CLNT_DELEGRETURN, &clp->cl_state)) { | |
1386 | nfs_client_return_marked_delegations(clp); | |
1387 | continue; | |
1388 | } | |
e005e804 TM |
1389 | |
1390 | nfs4_clear_state_manager_bit(clp); | |
f3c76491 TM |
1391 | /* Did we race with an attempt to give us more work? */ |
1392 | if (clp->cl_state == 0) | |
1393 | break; | |
1394 | if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) != 0) | |
1395 | break; | |
1da177e4 | 1396 | } |
e005e804 | 1397 | return; |
1da177e4 | 1398 | out_error: |
e005e804 | 1399 | printk(KERN_WARNING "Error: state manager failed on NFSv4 server %s" |
5d8515ca | 1400 | " with error %d\n", clp->cl_hostname, -status); |
e005e804 TM |
1401 | nfs4_clear_state_manager_bit(clp); |
1402 | } | |
1403 | ||
1404 | static int nfs4_run_state_manager(void *ptr) | |
1405 | { | |
1406 | struct nfs_client *clp = ptr; | |
1407 | ||
1408 | allow_signal(SIGKILL); | |
1409 | nfs4_state_manager(clp); | |
1410 | nfs_put_client(clp); | |
1411 | module_put_and_exit(0); | |
1412 | return 0; | |
1da177e4 LT |
1413 | } |
1414 | ||
1415 | /* | |
1416 | * Local variables: | |
1417 | * c-basic-offset: 8 | |
1418 | * End: | |
1419 | */ |