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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 | ||
5601a00d | 138 | static void nfs4_end_drain_session(struct nfs_client *clp) |
9dfdf404 | 139 | { |
5601a00d | 140 | struct nfs4_session *ses = clp->cl_session; |
689cf5c1 AB |
141 | int max_slots; |
142 | ||
143 | if (test_and_clear_bit(NFS4CLNT_SESSION_DRAINING, &clp->cl_state)) { | |
144 | spin_lock(&ses->fc_slot_table.slot_tbl_lock); | |
145 | max_slots = ses->fc_slot_table.max_slots; | |
146 | while (max_slots--) { | |
147 | struct rpc_task *task; | |
148 | ||
149 | task = rpc_wake_up_next(&ses->fc_slot_table. | |
150 | slot_tbl_waitq); | |
151 | if (!task) | |
152 | break; | |
153 | rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED); | |
154 | } | |
155 | spin_unlock(&ses->fc_slot_table.slot_tbl_lock); | |
156 | } | |
9dfdf404 RL |
157 | } |
158 | ||
5601a00d | 159 | static int nfs4_begin_drain_session(struct nfs_client *clp) |
9dfdf404 | 160 | { |
5601a00d | 161 | struct nfs4_session *ses = clp->cl_session; |
9dfdf404 RL |
162 | struct nfs4_slot_table *tbl = &ses->fc_slot_table; |
163 | ||
164 | spin_lock(&tbl->slot_tbl_lock); | |
165 | set_bit(NFS4CLNT_SESSION_DRAINING, &clp->cl_state); | |
166 | if (tbl->highest_used_slotid != -1) { | |
167 | INIT_COMPLETION(ses->complete); | |
168 | spin_unlock(&tbl->slot_tbl_lock); | |
169 | return wait_for_completion_interruptible(&ses->complete); | |
170 | } | |
171 | spin_unlock(&tbl->slot_tbl_lock); | |
172 | return 0; | |
173 | } | |
174 | ||
4d643d1d AA |
175 | int nfs41_init_clientid(struct nfs_client *clp, struct rpc_cred *cred) |
176 | { | |
177 | int status; | |
178 | ||
179 | status = nfs4_proc_exchange_id(clp, cred); | |
9430fb6b RL |
180 | if (status != 0) |
181 | goto out; | |
182 | status = nfs4_proc_create_session(clp); | |
183 | if (status != 0) | |
184 | goto out; | |
185 | nfs41_setup_state_renewal(clp); | |
186 | nfs_mark_client_ready(clp, NFS_CS_READY); | |
187 | out: | |
4d643d1d AA |
188 | return status; |
189 | } | |
190 | ||
b4b82607 AA |
191 | struct rpc_cred *nfs4_get_exchange_id_cred(struct nfs_client *clp) |
192 | { | |
193 | struct rpc_cred *cred; | |
194 | ||
195 | spin_lock(&clp->cl_lock); | |
196 | cred = nfs4_get_machine_cred_locked(clp); | |
197 | spin_unlock(&clp->cl_lock); | |
198 | return cred; | |
199 | } | |
200 | ||
201 | #endif /* CONFIG_NFS_V4_1 */ | |
202 | ||
a7b72103 | 203 | struct rpc_cred *nfs4_get_setclientid_cred(struct nfs_client *clp) |
286d7d6a TM |
204 | { |
205 | struct nfs4_state_owner *sp; | |
9f958ab8 | 206 | struct rb_node *pos; |
a2b2bb88 | 207 | struct rpc_cred *cred; |
286d7d6a | 208 | |
6dc9d57a TM |
209 | spin_lock(&clp->cl_lock); |
210 | cred = nfs4_get_machine_cred_locked(clp); | |
a2b2bb88 TM |
211 | if (cred != NULL) |
212 | goto out; | |
9f958ab8 TM |
213 | pos = rb_first(&clp->cl_state_owners); |
214 | if (pos != NULL) { | |
215 | sp = rb_entry(pos, struct nfs4_state_owner, so_client_node); | |
a2b2bb88 | 216 | cred = get_rpccred(sp->so_cred); |
286d7d6a | 217 | } |
a2b2bb88 | 218 | out: |
6dc9d57a | 219 | spin_unlock(&clp->cl_lock); |
a2b2bb88 | 220 | return cred; |
286d7d6a TM |
221 | } |
222 | ||
9f958ab8 TM |
223 | static void nfs_alloc_unique_id(struct rb_root *root, struct nfs_unique_id *new, |
224 | __u64 minval, int maxbits) | |
225 | { | |
226 | struct rb_node **p, *parent; | |
227 | struct nfs_unique_id *pos; | |
228 | __u64 mask = ~0ULL; | |
229 | ||
230 | if (maxbits < 64) | |
231 | mask = (1ULL << maxbits) - 1ULL; | |
232 | ||
233 | /* Ensure distribution is more or less flat */ | |
234 | get_random_bytes(&new->id, sizeof(new->id)); | |
235 | new->id &= mask; | |
236 | if (new->id < minval) | |
237 | new->id += minval; | |
238 | retry: | |
239 | p = &root->rb_node; | |
240 | parent = NULL; | |
241 | ||
242 | while (*p != NULL) { | |
243 | parent = *p; | |
244 | pos = rb_entry(parent, struct nfs_unique_id, rb_node); | |
245 | ||
246 | if (new->id < pos->id) | |
247 | p = &(*p)->rb_left; | |
248 | else if (new->id > pos->id) | |
249 | p = &(*p)->rb_right; | |
250 | else | |
251 | goto id_exists; | |
252 | } | |
253 | rb_link_node(&new->rb_node, parent, p); | |
254 | rb_insert_color(&new->rb_node, root); | |
255 | return; | |
256 | id_exists: | |
257 | for (;;) { | |
258 | new->id++; | |
259 | if (new->id < minval || (new->id & mask) != new->id) { | |
260 | new->id = minval; | |
261 | break; | |
262 | } | |
263 | parent = rb_next(parent); | |
264 | if (parent == NULL) | |
265 | break; | |
266 | pos = rb_entry(parent, struct nfs_unique_id, rb_node); | |
267 | if (new->id < pos->id) | |
268 | break; | |
269 | } | |
270 | goto retry; | |
271 | } | |
272 | ||
273 | static void nfs_free_unique_id(struct rb_root *root, struct nfs_unique_id *id) | |
274 | { | |
275 | rb_erase(&id->rb_node, root); | |
276 | } | |
277 | ||
1da177e4 | 278 | static struct nfs4_state_owner * |
6f2e64d3 | 279 | nfs4_find_state_owner(struct nfs_server *server, struct rpc_cred *cred) |
1da177e4 | 280 | { |
6f2e64d3 | 281 | struct nfs_client *clp = server->nfs_client; |
9f958ab8 TM |
282 | struct rb_node **p = &clp->cl_state_owners.rb_node, |
283 | *parent = NULL; | |
1da177e4 LT |
284 | struct nfs4_state_owner *sp, *res = NULL; |
285 | ||
9f958ab8 TM |
286 | while (*p != NULL) { |
287 | parent = *p; | |
288 | sp = rb_entry(parent, struct nfs4_state_owner, so_client_node); | |
289 | ||
6f2e64d3 TM |
290 | if (server < sp->so_server) { |
291 | p = &parent->rb_left; | |
292 | continue; | |
293 | } | |
294 | if (server > sp->so_server) { | |
295 | p = &parent->rb_right; | |
296 | continue; | |
297 | } | |
9f958ab8 TM |
298 | if (cred < sp->so_cred) |
299 | p = &parent->rb_left; | |
300 | else if (cred > sp->so_cred) | |
301 | p = &parent->rb_right; | |
302 | else { | |
303 | atomic_inc(&sp->so_count); | |
304 | res = sp; | |
305 | break; | |
306 | } | |
1da177e4 LT |
307 | } |
308 | return res; | |
309 | } | |
310 | ||
9f958ab8 TM |
311 | static struct nfs4_state_owner * |
312 | nfs4_insert_state_owner(struct nfs_client *clp, struct nfs4_state_owner *new) | |
313 | { | |
314 | struct rb_node **p = &clp->cl_state_owners.rb_node, | |
315 | *parent = NULL; | |
316 | struct nfs4_state_owner *sp; | |
317 | ||
318 | while (*p != NULL) { | |
319 | parent = *p; | |
320 | sp = rb_entry(parent, struct nfs4_state_owner, so_client_node); | |
321 | ||
6f2e64d3 TM |
322 | if (new->so_server < sp->so_server) { |
323 | p = &parent->rb_left; | |
324 | continue; | |
325 | } | |
326 | if (new->so_server > sp->so_server) { | |
327 | p = &parent->rb_right; | |
328 | continue; | |
329 | } | |
9f958ab8 TM |
330 | if (new->so_cred < sp->so_cred) |
331 | p = &parent->rb_left; | |
332 | else if (new->so_cred > sp->so_cred) | |
333 | p = &parent->rb_right; | |
334 | else { | |
335 | atomic_inc(&sp->so_count); | |
336 | return sp; | |
337 | } | |
338 | } | |
339 | nfs_alloc_unique_id(&clp->cl_openowner_id, &new->so_owner_id, 1, 64); | |
340 | rb_link_node(&new->so_client_node, parent, p); | |
341 | rb_insert_color(&new->so_client_node, &clp->cl_state_owners); | |
342 | return new; | |
343 | } | |
344 | ||
345 | static void | |
346 | nfs4_remove_state_owner(struct nfs_client *clp, struct nfs4_state_owner *sp) | |
347 | { | |
348 | if (!RB_EMPTY_NODE(&sp->so_client_node)) | |
349 | rb_erase(&sp->so_client_node, &clp->cl_state_owners); | |
350 | nfs_free_unique_id(&clp->cl_openowner_id, &sp->so_owner_id); | |
351 | } | |
352 | ||
1da177e4 LT |
353 | /* |
354 | * nfs4_alloc_state_owner(): this is called on the OPEN or CREATE path to | |
355 | * create a new state_owner. | |
356 | * | |
357 | */ | |
358 | static struct nfs4_state_owner * | |
359 | nfs4_alloc_state_owner(void) | |
360 | { | |
361 | struct nfs4_state_owner *sp; | |
362 | ||
cee54fc9 | 363 | sp = kzalloc(sizeof(*sp),GFP_KERNEL); |
1da177e4 LT |
364 | if (!sp) |
365 | return NULL; | |
ec073428 | 366 | spin_lock_init(&sp->so_lock); |
1da177e4 LT |
367 | INIT_LIST_HEAD(&sp->so_states); |
368 | INIT_LIST_HEAD(&sp->so_delegations); | |
cee54fc9 TM |
369 | rpc_init_wait_queue(&sp->so_sequence.wait, "Seqid_waitqueue"); |
370 | sp->so_seqid.sequence = &sp->so_sequence; | |
371 | spin_lock_init(&sp->so_sequence.lock); | |
372 | INIT_LIST_HEAD(&sp->so_sequence.list); | |
1da177e4 LT |
373 | atomic_set(&sp->so_count, 1); |
374 | return sp; | |
375 | } | |
376 | ||
1d2e88e7 | 377 | static void |
1da177e4 LT |
378 | nfs4_drop_state_owner(struct nfs4_state_owner *sp) |
379 | { | |
9f958ab8 TM |
380 | if (!RB_EMPTY_NODE(&sp->so_client_node)) { |
381 | struct nfs_client *clp = sp->so_client; | |
382 | ||
383 | spin_lock(&clp->cl_lock); | |
384 | rb_erase(&sp->so_client_node, &clp->cl_state_owners); | |
385 | RB_CLEAR_NODE(&sp->so_client_node); | |
386 | spin_unlock(&clp->cl_lock); | |
387 | } | |
1da177e4 LT |
388 | } |
389 | ||
1da177e4 LT |
390 | struct nfs4_state_owner *nfs4_get_state_owner(struct nfs_server *server, struct rpc_cred *cred) |
391 | { | |
7539bbab | 392 | struct nfs_client *clp = server->nfs_client; |
1da177e4 LT |
393 | struct nfs4_state_owner *sp, *new; |
394 | ||
1da177e4 | 395 | spin_lock(&clp->cl_lock); |
6f2e64d3 | 396 | sp = nfs4_find_state_owner(server, cred); |
1da177e4 | 397 | spin_unlock(&clp->cl_lock); |
1da177e4 LT |
398 | if (sp != NULL) |
399 | return sp; | |
9f958ab8 TM |
400 | new = nfs4_alloc_state_owner(); |
401 | if (new == NULL) | |
402 | return NULL; | |
403 | new->so_client = clp; | |
6f2e64d3 | 404 | new->so_server = server; |
9f958ab8 TM |
405 | new->so_cred = cred; |
406 | spin_lock(&clp->cl_lock); | |
407 | sp = nfs4_insert_state_owner(clp, new); | |
408 | spin_unlock(&clp->cl_lock); | |
409 | if (sp == new) | |
410 | get_rpccred(cred); | |
f6a1cc89 TM |
411 | else { |
412 | rpc_destroy_wait_queue(&new->so_sequence.wait); | |
9f958ab8 | 413 | kfree(new); |
f6a1cc89 | 414 | } |
9f958ab8 | 415 | return sp; |
1da177e4 LT |
416 | } |
417 | ||
1da177e4 LT |
418 | void nfs4_put_state_owner(struct nfs4_state_owner *sp) |
419 | { | |
adfa6f98 | 420 | struct nfs_client *clp = sp->so_client; |
1da177e4 LT |
421 | struct rpc_cred *cred = sp->so_cred; |
422 | ||
423 | if (!atomic_dec_and_lock(&sp->so_count, &clp->cl_lock)) | |
424 | return; | |
9f958ab8 | 425 | nfs4_remove_state_owner(clp, sp); |
1da177e4 | 426 | spin_unlock(&clp->cl_lock); |
f6a1cc89 | 427 | rpc_destroy_wait_queue(&sp->so_sequence.wait); |
1da177e4 LT |
428 | put_rpccred(cred); |
429 | kfree(sp); | |
430 | } | |
431 | ||
432 | static struct nfs4_state * | |
433 | nfs4_alloc_open_state(void) | |
434 | { | |
435 | struct nfs4_state *state; | |
436 | ||
e7616923 | 437 | state = kzalloc(sizeof(*state), GFP_KERNEL); |
1da177e4 LT |
438 | if (!state) |
439 | return NULL; | |
1da177e4 LT |
440 | atomic_set(&state->count, 1); |
441 | INIT_LIST_HEAD(&state->lock_states); | |
8d0a8a9d | 442 | spin_lock_init(&state->state_lock); |
8bda4e4c | 443 | seqlock_init(&state->seqlock); |
1da177e4 LT |
444 | return state; |
445 | } | |
446 | ||
4cecb76f | 447 | void |
dc0b027d | 448 | nfs4_state_set_mode_locked(struct nfs4_state *state, fmode_t fmode) |
4cecb76f | 449 | { |
dc0b027d | 450 | if (state->state == fmode) |
4cecb76f TM |
451 | return; |
452 | /* NB! List reordering - see the reclaim code for why. */ | |
dc0b027d TM |
453 | if ((fmode & FMODE_WRITE) != (state->state & FMODE_WRITE)) { |
454 | if (fmode & FMODE_WRITE) | |
4cecb76f TM |
455 | list_move(&state->open_states, &state->owner->so_states); |
456 | else | |
457 | list_move_tail(&state->open_states, &state->owner->so_states); | |
458 | } | |
dc0b027d | 459 | state->state = fmode; |
4cecb76f TM |
460 | } |
461 | ||
1da177e4 LT |
462 | static struct nfs4_state * |
463 | __nfs4_find_state_byowner(struct inode *inode, struct nfs4_state_owner *owner) | |
464 | { | |
465 | struct nfs_inode *nfsi = NFS_I(inode); | |
466 | struct nfs4_state *state; | |
467 | ||
468 | list_for_each_entry(state, &nfsi->open_states, inode_states) { | |
1c816efa | 469 | if (state->owner != owner) |
1da177e4 | 470 | continue; |
1c816efa | 471 | if (atomic_inc_not_zero(&state->count)) |
1da177e4 | 472 | return state; |
1da177e4 LT |
473 | } |
474 | return NULL; | |
475 | } | |
476 | ||
1da177e4 LT |
477 | static void |
478 | nfs4_free_open_state(struct nfs4_state *state) | |
479 | { | |
480 | kfree(state); | |
481 | } | |
482 | ||
483 | struct nfs4_state * | |
484 | nfs4_get_open_state(struct inode *inode, struct nfs4_state_owner *owner) | |
485 | { | |
486 | struct nfs4_state *state, *new; | |
487 | struct nfs_inode *nfsi = NFS_I(inode); | |
488 | ||
489 | spin_lock(&inode->i_lock); | |
490 | state = __nfs4_find_state_byowner(inode, owner); | |
491 | spin_unlock(&inode->i_lock); | |
492 | if (state) | |
493 | goto out; | |
494 | new = nfs4_alloc_open_state(); | |
ec073428 | 495 | spin_lock(&owner->so_lock); |
1da177e4 LT |
496 | spin_lock(&inode->i_lock); |
497 | state = __nfs4_find_state_byowner(inode, owner); | |
498 | if (state == NULL && new != NULL) { | |
499 | state = new; | |
1da177e4 LT |
500 | state->owner = owner; |
501 | atomic_inc(&owner->so_count); | |
502 | list_add(&state->inode_states, &nfsi->open_states); | |
503 | state->inode = igrab(inode); | |
504 | spin_unlock(&inode->i_lock); | |
ec073428 TM |
505 | /* Note: The reclaim code dictates that we add stateless |
506 | * and read-only stateids to the end of the list */ | |
507 | list_add_tail(&state->open_states, &owner->so_states); | |
508 | spin_unlock(&owner->so_lock); | |
1da177e4 LT |
509 | } else { |
510 | spin_unlock(&inode->i_lock); | |
ec073428 | 511 | spin_unlock(&owner->so_lock); |
1da177e4 LT |
512 | if (new) |
513 | nfs4_free_open_state(new); | |
514 | } | |
515 | out: | |
516 | return state; | |
517 | } | |
518 | ||
1da177e4 LT |
519 | void nfs4_put_open_state(struct nfs4_state *state) |
520 | { | |
521 | struct inode *inode = state->inode; | |
522 | struct nfs4_state_owner *owner = state->owner; | |
523 | ||
ec073428 | 524 | if (!atomic_dec_and_lock(&state->count, &owner->so_lock)) |
1da177e4 | 525 | return; |
ec073428 | 526 | spin_lock(&inode->i_lock); |
ba683031 | 527 | list_del(&state->inode_states); |
1da177e4 | 528 | list_del(&state->open_states); |
ec073428 TM |
529 | spin_unlock(&inode->i_lock); |
530 | spin_unlock(&owner->so_lock); | |
1da177e4 | 531 | iput(inode); |
1da177e4 LT |
532 | nfs4_free_open_state(state); |
533 | nfs4_put_state_owner(owner); | |
534 | } | |
535 | ||
536 | /* | |
83c9d41e | 537 | * Close the current file. |
1da177e4 | 538 | */ |
dc0b027d | 539 | static void __nfs4_close(struct path *path, struct nfs4_state *state, fmode_t fmode, int wait) |
1da177e4 | 540 | { |
1da177e4 | 541 | struct nfs4_state_owner *owner = state->owner; |
003707c7 | 542 | int call_close = 0; |
dc0b027d | 543 | fmode_t newstate; |
1da177e4 LT |
544 | |
545 | atomic_inc(&owner->so_count); | |
1da177e4 | 546 | /* Protect against nfs4_find_state() */ |
ec073428 | 547 | spin_lock(&owner->so_lock); |
dc0b027d | 548 | switch (fmode & (FMODE_READ | FMODE_WRITE)) { |
e7616923 TM |
549 | case FMODE_READ: |
550 | state->n_rdonly--; | |
551 | break; | |
552 | case FMODE_WRITE: | |
553 | state->n_wronly--; | |
554 | break; | |
555 | case FMODE_READ|FMODE_WRITE: | |
556 | state->n_rdwr--; | |
557 | } | |
003707c7 | 558 | newstate = FMODE_READ|FMODE_WRITE; |
e7616923 | 559 | if (state->n_rdwr == 0) { |
003707c7 | 560 | if (state->n_rdonly == 0) { |
e7616923 | 561 | newstate &= ~FMODE_READ; |
003707c7 TM |
562 | call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags); |
563 | call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); | |
564 | } | |
565 | if (state->n_wronly == 0) { | |
e7616923 | 566 | newstate &= ~FMODE_WRITE; |
003707c7 TM |
567 | call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags); |
568 | call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); | |
569 | } | |
570 | if (newstate == 0) | |
571 | clear_bit(NFS_DELEGATED_STATE, &state->flags); | |
e7616923 | 572 | } |
003707c7 | 573 | nfs4_state_set_mode_locked(state, newstate); |
ec073428 | 574 | spin_unlock(&owner->so_lock); |
4cecb76f | 575 | |
003707c7 | 576 | if (!call_close) { |
b39e625b TM |
577 | nfs4_put_open_state(state); |
578 | nfs4_put_state_owner(owner); | |
579 | } else | |
a49c3c77 TM |
580 | nfs4_do_close(path, state, wait); |
581 | } | |
582 | ||
dc0b027d | 583 | void nfs4_close_state(struct path *path, struct nfs4_state *state, fmode_t fmode) |
a49c3c77 | 584 | { |
dc0b027d | 585 | __nfs4_close(path, state, fmode, 0); |
a49c3c77 TM |
586 | } |
587 | ||
dc0b027d | 588 | void nfs4_close_sync(struct path *path, struct nfs4_state *state, fmode_t fmode) |
a49c3c77 | 589 | { |
dc0b027d | 590 | __nfs4_close(path, state, fmode, 1); |
1da177e4 LT |
591 | } |
592 | ||
593 | /* | |
594 | * Search the state->lock_states for an existing lock_owner | |
595 | * that is compatible with current->files | |
596 | */ | |
597 | static struct nfs4_lock_state * | |
598 | __nfs4_find_lock_state(struct nfs4_state *state, fl_owner_t fl_owner) | |
599 | { | |
600 | struct nfs4_lock_state *pos; | |
601 | list_for_each_entry(pos, &state->lock_states, ls_locks) { | |
602 | if (pos->ls_owner != fl_owner) | |
603 | continue; | |
604 | atomic_inc(&pos->ls_count); | |
605 | return pos; | |
606 | } | |
607 | return NULL; | |
608 | } | |
609 | ||
1da177e4 LT |
610 | /* |
611 | * Return a compatible lock_state. If no initialized lock_state structure | |
612 | * exists, return an uninitialized one. | |
613 | * | |
1da177e4 LT |
614 | */ |
615 | static struct nfs4_lock_state *nfs4_alloc_lock_state(struct nfs4_state *state, fl_owner_t fl_owner) | |
616 | { | |
617 | struct nfs4_lock_state *lsp; | |
adfa6f98 | 618 | struct nfs_client *clp = state->owner->so_client; |
1da177e4 | 619 | |
cee54fc9 | 620 | lsp = kzalloc(sizeof(*lsp), GFP_KERNEL); |
1da177e4 LT |
621 | if (lsp == NULL) |
622 | return NULL; | |
d0dc3701 TM |
623 | rpc_init_wait_queue(&lsp->ls_sequence.wait, "lock_seqid_waitqueue"); |
624 | spin_lock_init(&lsp->ls_sequence.lock); | |
625 | INIT_LIST_HEAD(&lsp->ls_sequence.list); | |
626 | lsp->ls_seqid.sequence = &lsp->ls_sequence; | |
1da177e4 | 627 | atomic_set(&lsp->ls_count, 1); |
b64aec8d | 628 | lsp->ls_state = state; |
1da177e4 | 629 | lsp->ls_owner = fl_owner; |
1da177e4 | 630 | spin_lock(&clp->cl_lock); |
9f958ab8 | 631 | nfs_alloc_unique_id(&clp->cl_lockowner_id, &lsp->ls_id, 1, 64); |
1da177e4 | 632 | spin_unlock(&clp->cl_lock); |
8d0a8a9d | 633 | INIT_LIST_HEAD(&lsp->ls_locks); |
1da177e4 LT |
634 | return lsp; |
635 | } | |
636 | ||
9f958ab8 TM |
637 | static void nfs4_free_lock_state(struct nfs4_lock_state *lsp) |
638 | { | |
639 | struct nfs_client *clp = lsp->ls_state->owner->so_client; | |
640 | ||
641 | spin_lock(&clp->cl_lock); | |
642 | nfs_free_unique_id(&clp->cl_lockowner_id, &lsp->ls_id); | |
643 | spin_unlock(&clp->cl_lock); | |
f6a1cc89 | 644 | rpc_destroy_wait_queue(&lsp->ls_sequence.wait); |
9f958ab8 TM |
645 | kfree(lsp); |
646 | } | |
647 | ||
1da177e4 LT |
648 | /* |
649 | * Return a compatible lock_state. If no initialized lock_state structure | |
650 | * exists, return an uninitialized one. | |
651 | * | |
1da177e4 | 652 | */ |
8d0a8a9d | 653 | static struct nfs4_lock_state *nfs4_get_lock_state(struct nfs4_state *state, fl_owner_t owner) |
1da177e4 | 654 | { |
8d0a8a9d | 655 | struct nfs4_lock_state *lsp, *new = NULL; |
1da177e4 | 656 | |
8d0a8a9d TM |
657 | for(;;) { |
658 | spin_lock(&state->state_lock); | |
659 | lsp = __nfs4_find_lock_state(state, owner); | |
660 | if (lsp != NULL) | |
661 | break; | |
662 | if (new != NULL) { | |
8d0a8a9d TM |
663 | list_add(&new->ls_locks, &state->lock_states); |
664 | set_bit(LK_STATE_IN_USE, &state->flags); | |
665 | lsp = new; | |
666 | new = NULL; | |
667 | break; | |
668 | } | |
669 | spin_unlock(&state->state_lock); | |
670 | new = nfs4_alloc_lock_state(state, owner); | |
671 | if (new == NULL) | |
672 | return NULL; | |
673 | } | |
674 | spin_unlock(&state->state_lock); | |
9f958ab8 TM |
675 | if (new != NULL) |
676 | nfs4_free_lock_state(new); | |
1da177e4 LT |
677 | return lsp; |
678 | } | |
679 | ||
680 | /* | |
8d0a8a9d TM |
681 | * Release reference to lock_state, and free it if we see that |
682 | * it is no longer in use | |
1da177e4 | 683 | */ |
faf5f49c | 684 | void nfs4_put_lock_state(struct nfs4_lock_state *lsp) |
1da177e4 | 685 | { |
8d0a8a9d | 686 | struct nfs4_state *state; |
1da177e4 | 687 | |
8d0a8a9d TM |
688 | if (lsp == NULL) |
689 | return; | |
690 | state = lsp->ls_state; | |
691 | if (!atomic_dec_and_lock(&lsp->ls_count, &state->state_lock)) | |
692 | return; | |
693 | list_del(&lsp->ls_locks); | |
694 | if (list_empty(&state->lock_states)) | |
695 | clear_bit(LK_STATE_IN_USE, &state->flags); | |
696 | spin_unlock(&state->state_lock); | |
9f958ab8 | 697 | nfs4_free_lock_state(lsp); |
1da177e4 LT |
698 | } |
699 | ||
8d0a8a9d | 700 | static void nfs4_fl_copy_lock(struct file_lock *dst, struct file_lock *src) |
1da177e4 | 701 | { |
8d0a8a9d | 702 | struct nfs4_lock_state *lsp = src->fl_u.nfs4_fl.owner; |
1da177e4 | 703 | |
8d0a8a9d TM |
704 | dst->fl_u.nfs4_fl.owner = lsp; |
705 | atomic_inc(&lsp->ls_count); | |
706 | } | |
1da177e4 | 707 | |
8d0a8a9d | 708 | static void nfs4_fl_release_lock(struct file_lock *fl) |
1da177e4 | 709 | { |
8d0a8a9d | 710 | nfs4_put_lock_state(fl->fl_u.nfs4_fl.owner); |
1da177e4 LT |
711 | } |
712 | ||
6aed6285 | 713 | static const struct file_lock_operations nfs4_fl_lock_ops = { |
8d0a8a9d TM |
714 | .fl_copy_lock = nfs4_fl_copy_lock, |
715 | .fl_release_private = nfs4_fl_release_lock, | |
716 | }; | |
717 | ||
718 | int nfs4_set_lock_state(struct nfs4_state *state, struct file_lock *fl) | |
1da177e4 | 719 | { |
8d0a8a9d TM |
720 | struct nfs4_lock_state *lsp; |
721 | ||
722 | if (fl->fl_ops != NULL) | |
723 | return 0; | |
724 | lsp = nfs4_get_lock_state(state, fl->fl_owner); | |
725 | if (lsp == NULL) | |
726 | return -ENOMEM; | |
727 | fl->fl_u.nfs4_fl.owner = lsp; | |
728 | fl->fl_ops = &nfs4_fl_lock_ops; | |
729 | return 0; | |
1da177e4 LT |
730 | } |
731 | ||
8d0a8a9d TM |
732 | /* |
733 | * Byte-range lock aware utility to initialize the stateid of read/write | |
734 | * requests. | |
1da177e4 | 735 | */ |
8d0a8a9d | 736 | void nfs4_copy_stateid(nfs4_stateid *dst, struct nfs4_state *state, fl_owner_t fl_owner) |
1da177e4 | 737 | { |
8d0a8a9d | 738 | struct nfs4_lock_state *lsp; |
8bda4e4c | 739 | int seq; |
1da177e4 | 740 | |
8bda4e4c TM |
741 | do { |
742 | seq = read_seqbegin(&state->seqlock); | |
743 | memcpy(dst, &state->stateid, sizeof(*dst)); | |
744 | } while (read_seqretry(&state->seqlock, seq)); | |
8d0a8a9d TM |
745 | if (test_bit(LK_STATE_IN_USE, &state->flags) == 0) |
746 | return; | |
1da177e4 | 747 | |
8d0a8a9d TM |
748 | spin_lock(&state->state_lock); |
749 | lsp = __nfs4_find_lock_state(state, fl_owner); | |
750 | if (lsp != NULL && (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0) | |
751 | memcpy(dst, &lsp->ls_stateid, sizeof(*dst)); | |
752 | spin_unlock(&state->state_lock); | |
1da177e4 LT |
753 | nfs4_put_lock_state(lsp); |
754 | } | |
755 | ||
cee54fc9 TM |
756 | struct nfs_seqid *nfs_alloc_seqid(struct nfs_seqid_counter *counter) |
757 | { | |
cee54fc9 TM |
758 | struct nfs_seqid *new; |
759 | ||
760 | new = kmalloc(sizeof(*new), GFP_KERNEL); | |
761 | if (new != NULL) { | |
762 | new->sequence = counter; | |
2f74c0a0 | 763 | INIT_LIST_HEAD(&new->list); |
cee54fc9 TM |
764 | } |
765 | return new; | |
766 | } | |
767 | ||
768 | void nfs_free_seqid(struct nfs_seqid *seqid) | |
1da177e4 | 769 | { |
2f74c0a0 TM |
770 | if (!list_empty(&seqid->list)) { |
771 | struct rpc_sequence *sequence = seqid->sequence->sequence; | |
cee54fc9 | 772 | |
2f74c0a0 TM |
773 | spin_lock(&sequence->lock); |
774 | list_del(&seqid->list); | |
775 | spin_unlock(&sequence->lock); | |
776 | rpc_wake_up(&sequence->wait); | |
777 | } | |
cee54fc9 | 778 | kfree(seqid); |
1da177e4 LT |
779 | } |
780 | ||
781 | /* | |
cee54fc9 TM |
782 | * Increment the seqid if the OPEN/OPEN_DOWNGRADE/CLOSE succeeded, or |
783 | * failed with a seqid incrementing error - | |
784 | * see comments nfs_fs.h:seqid_mutating_error() | |
785 | */ | |
88d90939 | 786 | static void nfs_increment_seqid(int status, struct nfs_seqid *seqid) |
cee54fc9 | 787 | { |
2f74c0a0 | 788 | BUG_ON(list_first_entry(&seqid->sequence->sequence->list, struct nfs_seqid, list) != seqid); |
cee54fc9 TM |
789 | switch (status) { |
790 | case 0: | |
791 | break; | |
792 | case -NFS4ERR_BAD_SEQID: | |
6f43ddcc TM |
793 | if (seqid->sequence->flags & NFS_SEQID_CONFIRMED) |
794 | return; | |
795 | printk(KERN_WARNING "NFS: v4 server returned a bad" | |
497799e7 DM |
796 | " sequence-id error on an" |
797 | " unconfirmed sequence %p!\n", | |
6f43ddcc | 798 | seqid->sequence); |
cee54fc9 TM |
799 | case -NFS4ERR_STALE_CLIENTID: |
800 | case -NFS4ERR_STALE_STATEID: | |
801 | case -NFS4ERR_BAD_STATEID: | |
802 | case -NFS4ERR_BADXDR: | |
803 | case -NFS4ERR_RESOURCE: | |
804 | case -NFS4ERR_NOFILEHANDLE: | |
805 | /* Non-seqid mutating errors */ | |
806 | return; | |
807 | }; | |
808 | /* | |
809 | * Note: no locking needed as we are guaranteed to be first | |
810 | * on the sequence list | |
811 | */ | |
812 | seqid->sequence->counter++; | |
813 | } | |
814 | ||
815 | void nfs_increment_open_seqid(int status, struct nfs_seqid *seqid) | |
816 | { | |
34dc1ad7 BH |
817 | struct nfs4_state_owner *sp = container_of(seqid->sequence, |
818 | struct nfs4_state_owner, so_seqid); | |
819 | struct nfs_server *server = sp->so_server; | |
820 | ||
821 | if (status == -NFS4ERR_BAD_SEQID) | |
1da177e4 | 822 | nfs4_drop_state_owner(sp); |
34dc1ad7 BH |
823 | if (!nfs4_has_session(server->nfs_client)) |
824 | nfs_increment_seqid(status, seqid); | |
cee54fc9 TM |
825 | } |
826 | ||
827 | /* | |
cee54fc9 TM |
828 | * Increment the seqid if the LOCK/LOCKU succeeded, or |
829 | * failed with a seqid incrementing error - | |
830 | * see comments nfs_fs.h:seqid_mutating_error() | |
831 | */ | |
832 | void nfs_increment_lock_seqid(int status, struct nfs_seqid *seqid) | |
833 | { | |
88d90939 | 834 | nfs_increment_seqid(status, seqid); |
cee54fc9 TM |
835 | } |
836 | ||
837 | int nfs_wait_on_sequence(struct nfs_seqid *seqid, struct rpc_task *task) | |
838 | { | |
839 | struct rpc_sequence *sequence = seqid->sequence->sequence; | |
840 | int status = 0; | |
841 | ||
842 | spin_lock(&sequence->lock); | |
2f74c0a0 TM |
843 | if (list_empty(&seqid->list)) |
844 | list_add_tail(&seqid->list, &sequence->list); | |
845 | if (list_first_entry(&sequence->list, struct nfs_seqid, list) == seqid) | |
846 | goto unlock; | |
5d00837b | 847 | rpc_sleep_on(&sequence->wait, task, NULL); |
2f74c0a0 TM |
848 | status = -EAGAIN; |
849 | unlock: | |
cee54fc9 TM |
850 | spin_unlock(&sequence->lock); |
851 | return status; | |
1da177e4 LT |
852 | } |
853 | ||
e005e804 | 854 | static int nfs4_run_state_manager(void *); |
1da177e4 | 855 | |
e005e804 | 856 | static void nfs4_clear_state_manager_bit(struct nfs_client *clp) |
433fbe4c TM |
857 | { |
858 | smp_mb__before_clear_bit(); | |
e005e804 | 859 | clear_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state); |
433fbe4c | 860 | smp_mb__after_clear_bit(); |
e005e804 | 861 | wake_up_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING); |
433fbe4c TM |
862 | rpc_wake_up(&clp->cl_rpcwaitq); |
863 | } | |
864 | ||
1da177e4 | 865 | /* |
e005e804 | 866 | * Schedule the nfs_client asynchronous state management routine |
1da177e4 | 867 | */ |
b0d3ded1 | 868 | void nfs4_schedule_state_manager(struct nfs_client *clp) |
1da177e4 | 869 | { |
5043e900 | 870 | struct task_struct *task; |
1da177e4 | 871 | |
e005e804 TM |
872 | if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) != 0) |
873 | return; | |
5043e900 TM |
874 | __module_get(THIS_MODULE); |
875 | atomic_inc(&clp->cl_count); | |
e005e804 | 876 | task = kthread_run(nfs4_run_state_manager, clp, "%s-manager", |
5d8515ca CL |
877 | rpc_peeraddr2str(clp->cl_rpcclient, |
878 | RPC_DISPLAY_ADDR)); | |
5043e900 TM |
879 | if (!IS_ERR(task)) |
880 | return; | |
e005e804 | 881 | nfs4_clear_state_manager_bit(clp); |
24c8dbbb | 882 | nfs_put_client(clp); |
5043e900 | 883 | module_put(THIS_MODULE); |
1da177e4 LT |
884 | } |
885 | ||
886 | /* | |
887 | * Schedule a state recovery attempt | |
888 | */ | |
adfa6f98 | 889 | void nfs4_schedule_state_recovery(struct nfs_client *clp) |
1da177e4 LT |
890 | { |
891 | if (!clp) | |
892 | return; | |
e598d843 TM |
893 | if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
894 | set_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); | |
e005e804 | 895 | nfs4_schedule_state_manager(clp); |
1da177e4 LT |
896 | } |
897 | ||
b79a4a1b TM |
898 | static int nfs4_state_mark_reclaim_reboot(struct nfs_client *clp, struct nfs4_state *state) |
899 | { | |
900 | ||
901 | set_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); | |
902 | /* Don't recover state that expired before the reboot */ | |
903 | if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) { | |
904 | clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); | |
905 | return 0; | |
906 | } | |
7eff03ae | 907 | set_bit(NFS_OWNER_RECLAIM_REBOOT, &state->owner->so_flags); |
b79a4a1b TM |
908 | set_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state); |
909 | return 1; | |
910 | } | |
911 | ||
9e33bed5 | 912 | int nfs4_state_mark_reclaim_nograce(struct nfs_client *clp, struct nfs4_state *state) |
b79a4a1b TM |
913 | { |
914 | set_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags); | |
915 | clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); | |
7eff03ae | 916 | set_bit(NFS_OWNER_RECLAIM_NOGRACE, &state->owner->so_flags); |
b79a4a1b TM |
917 | set_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state); |
918 | return 1; | |
919 | } | |
920 | ||
02860014 | 921 | static int nfs4_reclaim_locks(struct nfs4_state *state, const struct nfs4_state_recovery_ops *ops) |
1da177e4 LT |
922 | { |
923 | struct inode *inode = state->inode; | |
19e03c57 | 924 | struct nfs_inode *nfsi = NFS_I(inode); |
1da177e4 LT |
925 | struct file_lock *fl; |
926 | int status = 0; | |
927 | ||
3f09df70 TM |
928 | if (inode->i_flock == NULL) |
929 | return 0; | |
930 | ||
931 | /* Guard against delegation returns and new lock/unlock calls */ | |
19e03c57 | 932 | down_write(&nfsi->rwsem); |
3f09df70 TM |
933 | /* Protect inode->i_flock using the BKL */ |
934 | lock_kernel(); | |
90dc7d27 | 935 | for (fl = inode->i_flock; fl != NULL; fl = fl->fl_next) { |
43b2a33a | 936 | if (!(fl->fl_flags & (FL_POSIX|FL_FLOCK))) |
1da177e4 | 937 | continue; |
cd3758e3 | 938 | if (nfs_file_open_context(fl->fl_file)->state != state) |
1da177e4 | 939 | continue; |
3f09df70 | 940 | unlock_kernel(); |
1da177e4 | 941 | status = ops->recover_lock(state, fl); |
1da177e4 | 942 | switch (status) { |
965b5d67 TM |
943 | case 0: |
944 | break; | |
945 | case -ESTALE: | |
946 | case -NFS4ERR_ADMIN_REVOKED: | |
947 | case -NFS4ERR_STALE_STATEID: | |
948 | case -NFS4ERR_BAD_STATEID: | |
949 | case -NFS4ERR_EXPIRED: | |
950 | case -NFS4ERR_NO_GRACE: | |
951 | case -NFS4ERR_STALE_CLIENTID: | |
9c4c761a TM |
952 | case -NFS4ERR_BADSESSION: |
953 | case -NFS4ERR_BADSLOT: | |
954 | case -NFS4ERR_BAD_HIGH_SLOT: | |
955 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
965b5d67 | 956 | goto out; |
1da177e4 LT |
957 | default: |
958 | printk(KERN_ERR "%s: unhandled error %d. Zeroing state\n", | |
3110ff80 | 959 | __func__, status); |
965b5d67 TM |
960 | case -ENOMEM: |
961 | case -NFS4ERR_DENIED: | |
1da177e4 LT |
962 | case -NFS4ERR_RECLAIM_BAD: |
963 | case -NFS4ERR_RECLAIM_CONFLICT: | |
43b2a33a | 964 | /* kill_proc(fl->fl_pid, SIGLOST, 1); */ |
965b5d67 | 965 | status = 0; |
1da177e4 | 966 | } |
3f09df70 | 967 | lock_kernel(); |
1da177e4 | 968 | } |
3f09df70 | 969 | unlock_kernel(); |
965b5d67 | 970 | out: |
19e03c57 | 971 | up_write(&nfsi->rwsem); |
1da177e4 LT |
972 | return status; |
973 | } | |
974 | ||
02860014 | 975 | static int nfs4_reclaim_open_state(struct nfs4_state_owner *sp, const struct nfs4_state_recovery_ops *ops) |
1da177e4 LT |
976 | { |
977 | struct nfs4_state *state; | |
978 | struct nfs4_lock_state *lock; | |
979 | int status = 0; | |
980 | ||
981 | /* Note: we rely on the sp->so_states list being ordered | |
982 | * so that we always reclaim open(O_RDWR) and/or open(O_WRITE) | |
983 | * states first. | |
984 | * This is needed to ensure that the server won't give us any | |
985 | * read delegations that we have to return if, say, we are | |
986 | * recovering after a network partition or a reboot from a | |
987 | * server that doesn't support a grace period. | |
988 | */ | |
fe1d8195 TM |
989 | restart: |
990 | spin_lock(&sp->so_lock); | |
1da177e4 | 991 | list_for_each_entry(state, &sp->so_states, open_states) { |
b79a4a1b TM |
992 | if (!test_and_clear_bit(ops->state_flag_bit, &state->flags)) |
993 | continue; | |
1da177e4 LT |
994 | if (state->state == 0) |
995 | continue; | |
fe1d8195 TM |
996 | atomic_inc(&state->count); |
997 | spin_unlock(&sp->so_lock); | |
1da177e4 | 998 | status = ops->recover_open(sp, state); |
1da177e4 | 999 | if (status >= 0) { |
02860014 TM |
1000 | status = nfs4_reclaim_locks(state, ops); |
1001 | if (status >= 0) { | |
1002 | list_for_each_entry(lock, &state->lock_states, ls_locks) { | |
1003 | if (!(lock->ls_flags & NFS_LOCK_INITIALIZED)) | |
1004 | printk("%s: Lock reclaim failed!\n", | |
3110ff80 | 1005 | __func__); |
02860014 | 1006 | } |
fe1d8195 TM |
1007 | nfs4_put_open_state(state); |
1008 | goto restart; | |
1da177e4 | 1009 | } |
1da177e4 LT |
1010 | } |
1011 | switch (status) { | |
1012 | default: | |
1013 | printk(KERN_ERR "%s: unhandled error %d. Zeroing state\n", | |
3110ff80 | 1014 | __func__, status); |
1da177e4 | 1015 | case -ENOENT: |
965b5d67 | 1016 | case -ENOMEM: |
b79a4a1b | 1017 | case -ESTALE: |
1da177e4 LT |
1018 | /* |
1019 | * Open state on this file cannot be recovered | |
1020 | * All we can do is revert to using the zero stateid. | |
1021 | */ | |
1022 | memset(state->stateid.data, 0, | |
1023 | sizeof(state->stateid.data)); | |
1024 | /* Mark the file as being 'closed' */ | |
1025 | state->state = 0; | |
1026 | break; | |
965b5d67 TM |
1027 | case -NFS4ERR_ADMIN_REVOKED: |
1028 | case -NFS4ERR_STALE_STATEID: | |
1029 | case -NFS4ERR_BAD_STATEID: | |
b79a4a1b TM |
1030 | case -NFS4ERR_RECLAIM_BAD: |
1031 | case -NFS4ERR_RECLAIM_CONFLICT: | |
1032 | nfs4_state_mark_reclaim_nograce(sp->so_client, state); | |
1033 | break; | |
1da177e4 LT |
1034 | case -NFS4ERR_EXPIRED: |
1035 | case -NFS4ERR_NO_GRACE: | |
b79a4a1b | 1036 | nfs4_state_mark_reclaim_nograce(sp->so_client, state); |
1da177e4 | 1037 | case -NFS4ERR_STALE_CLIENTID: |
9c4c761a TM |
1038 | case -NFS4ERR_BADSESSION: |
1039 | case -NFS4ERR_BADSLOT: | |
1040 | case -NFS4ERR_BAD_HIGH_SLOT: | |
1041 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
1da177e4 LT |
1042 | goto out_err; |
1043 | } | |
fe1d8195 TM |
1044 | nfs4_put_open_state(state); |
1045 | goto restart; | |
1da177e4 | 1046 | } |
fe1d8195 | 1047 | spin_unlock(&sp->so_lock); |
1da177e4 LT |
1048 | return 0; |
1049 | out_err: | |
fe1d8195 | 1050 | nfs4_put_open_state(state); |
1da177e4 LT |
1051 | return status; |
1052 | } | |
1053 | ||
b79a4a1b TM |
1054 | static void nfs4_clear_open_state(struct nfs4_state *state) |
1055 | { | |
1056 | struct nfs4_lock_state *lock; | |
1057 | ||
1058 | clear_bit(NFS_DELEGATED_STATE, &state->flags); | |
1059 | clear_bit(NFS_O_RDONLY_STATE, &state->flags); | |
1060 | clear_bit(NFS_O_WRONLY_STATE, &state->flags); | |
1061 | clear_bit(NFS_O_RDWR_STATE, &state->flags); | |
1062 | list_for_each_entry(lock, &state->lock_states, ls_locks) { | |
b79a4a1b TM |
1063 | lock->ls_seqid.flags = 0; |
1064 | lock->ls_flags &= ~NFS_LOCK_INITIALIZED; | |
1065 | } | |
1066 | } | |
1067 | ||
1068 | static void nfs4_state_mark_reclaim_helper(struct nfs_client *clp, int (*mark_reclaim)(struct nfs_client *clp, struct nfs4_state *state)) | |
cee54fc9 TM |
1069 | { |
1070 | struct nfs4_state_owner *sp; | |
9f958ab8 | 1071 | struct rb_node *pos; |
cee54fc9 | 1072 | struct nfs4_state *state; |
cee54fc9 TM |
1073 | |
1074 | /* Reset all sequence ids to zero */ | |
9f958ab8 TM |
1075 | for (pos = rb_first(&clp->cl_state_owners); pos != NULL; pos = rb_next(pos)) { |
1076 | sp = rb_entry(pos, struct nfs4_state_owner, so_client_node); | |
cee54fc9 | 1077 | sp->so_seqid.flags = 0; |
ec073428 | 1078 | spin_lock(&sp->so_lock); |
cee54fc9 | 1079 | list_for_each_entry(state, &sp->so_states, open_states) { |
b79a4a1b TM |
1080 | if (mark_reclaim(clp, state)) |
1081 | nfs4_clear_open_state(state); | |
cee54fc9 | 1082 | } |
ec073428 | 1083 | spin_unlock(&sp->so_lock); |
cee54fc9 TM |
1084 | } |
1085 | } | |
1086 | ||
b79a4a1b TM |
1087 | static void nfs4_state_start_reclaim_reboot(struct nfs_client *clp) |
1088 | { | |
1089 | /* Mark all delegations for reclaim */ | |
1090 | nfs_delegation_mark_reclaim(clp); | |
1091 | nfs4_state_mark_reclaim_helper(clp, nfs4_state_mark_reclaim_reboot); | |
1092 | } | |
1093 | ||
fce5c838 RL |
1094 | static void nfs4_reclaim_complete(struct nfs_client *clp, |
1095 | const struct nfs4_state_recovery_ops *ops) | |
1096 | { | |
1097 | /* Notify the server we're done reclaiming our state */ | |
1098 | if (ops->reclaim_complete) | |
1099 | (void)ops->reclaim_complete(clp); | |
1100 | } | |
1101 | ||
b79a4a1b TM |
1102 | static void nfs4_state_end_reclaim_reboot(struct nfs_client *clp) |
1103 | { | |
1104 | struct nfs4_state_owner *sp; | |
1105 | struct rb_node *pos; | |
1106 | struct nfs4_state *state; | |
1107 | ||
1108 | if (!test_and_clear_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) | |
1109 | return; | |
1110 | ||
7cab89b2 RL |
1111 | nfs4_reclaim_complete(clp, |
1112 | nfs4_reboot_recovery_ops[clp->cl_minorversion]); | |
1113 | ||
b79a4a1b TM |
1114 | for (pos = rb_first(&clp->cl_state_owners); pos != NULL; pos = rb_next(pos)) { |
1115 | sp = rb_entry(pos, struct nfs4_state_owner, so_client_node); | |
1116 | spin_lock(&sp->so_lock); | |
1117 | list_for_each_entry(state, &sp->so_states, open_states) { | |
1118 | if (!test_and_clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags)) | |
1119 | continue; | |
1120 | nfs4_state_mark_reclaim_nograce(clp, state); | |
1121 | } | |
1122 | spin_unlock(&sp->so_lock); | |
1123 | } | |
1124 | ||
1125 | nfs_delegation_reap_unclaimed(clp); | |
1126 | } | |
1127 | ||
1128 | static void nfs_delegation_clear_all(struct nfs_client *clp) | |
1129 | { | |
1130 | nfs_delegation_mark_reclaim(clp); | |
1131 | nfs_delegation_reap_unclaimed(clp); | |
1132 | } | |
1133 | ||
1134 | static void nfs4_state_start_reclaim_nograce(struct nfs_client *clp) | |
1135 | { | |
1136 | nfs_delegation_clear_all(clp); | |
1137 | nfs4_state_mark_reclaim_helper(clp, nfs4_state_mark_reclaim_nograce); | |
1138 | } | |
1139 | ||
4f7cdf18 | 1140 | static int nfs4_recovery_handle_error(struct nfs_client *clp, int error) |
e598d843 TM |
1141 | { |
1142 | switch (error) { | |
1143 | case -NFS4ERR_CB_PATH_DOWN: | |
707fb4b3 | 1144 | nfs_handle_cb_pathdown(clp); |
4f7cdf18 | 1145 | return 0; |
c8b7ae3d TM |
1146 | case -NFS4ERR_NO_GRACE: |
1147 | nfs4_state_end_reclaim_reboot(clp); | |
1148 | return 0; | |
e598d843 TM |
1149 | case -NFS4ERR_STALE_CLIENTID: |
1150 | case -NFS4ERR_LEASE_MOVED: | |
1151 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
e345e88a | 1152 | nfs4_state_end_reclaim_reboot(clp); |
e598d843 TM |
1153 | nfs4_state_start_reclaim_reboot(clp); |
1154 | break; | |
1155 | case -NFS4ERR_EXPIRED: | |
1156 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1157 | nfs4_state_start_reclaim_nograce(clp); | |
8ba9bf8e | 1158 | break; |
c3fad1b1 AA |
1159 | case -NFS4ERR_BADSESSION: |
1160 | case -NFS4ERR_BADSLOT: | |
1161 | case -NFS4ERR_BAD_HIGH_SLOT: | |
1162 | case -NFS4ERR_DEADSESSION: | |
1163 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
1164 | case -NFS4ERR_SEQ_FALSE_RETRY: | |
1165 | case -NFS4ERR_SEQ_MISORDERED: | |
6df08189 | 1166 | set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); |
0b9e2d41 AA |
1167 | /* Zero session reset errors */ |
1168 | return 0; | |
e598d843 | 1169 | } |
4f7cdf18 | 1170 | return error; |
e598d843 TM |
1171 | } |
1172 | ||
02860014 | 1173 | static int nfs4_do_reclaim(struct nfs_client *clp, const struct nfs4_state_recovery_ops *ops) |
1da177e4 | 1174 | { |
9f958ab8 | 1175 | struct rb_node *pos; |
1da177e4 LT |
1176 | int status = 0; |
1177 | ||
7eff03ae TM |
1178 | restart: |
1179 | spin_lock(&clp->cl_lock); | |
02860014 TM |
1180 | for (pos = rb_first(&clp->cl_state_owners); pos != NULL; pos = rb_next(pos)) { |
1181 | struct nfs4_state_owner *sp = rb_entry(pos, struct nfs4_state_owner, so_client_node); | |
7eff03ae TM |
1182 | if (!test_and_clear_bit(ops->owner_flag_bit, &sp->so_flags)) |
1183 | continue; | |
1184 | atomic_inc(&sp->so_count); | |
1185 | spin_unlock(&clp->cl_lock); | |
02860014 | 1186 | status = nfs4_reclaim_open_state(sp, ops); |
7eff03ae TM |
1187 | if (status < 0) { |
1188 | set_bit(ops->owner_flag_bit, &sp->so_flags); | |
1189 | nfs4_put_state_owner(sp); | |
4f7cdf18 | 1190 | return nfs4_recovery_handle_error(clp, status); |
7eff03ae TM |
1191 | } |
1192 | nfs4_put_state_owner(sp); | |
1193 | goto restart; | |
02860014 | 1194 | } |
7eff03ae | 1195 | spin_unlock(&clp->cl_lock); |
02860014 TM |
1196 | return status; |
1197 | } | |
1198 | ||
1199 | static int nfs4_check_lease(struct nfs_client *clp) | |
1200 | { | |
1201 | struct rpc_cred *cred; | |
8e69514f BH |
1202 | struct nfs4_state_maintenance_ops *ops = |
1203 | nfs4_state_renewal_ops[clp->cl_minorversion]; | |
02860014 | 1204 | int status = -NFS4ERR_EXPIRED; |
1da177e4 | 1205 | |
0f605b56 TM |
1206 | /* Is the client already known to have an expired lease? */ |
1207 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) | |
1208 | return 0; | |
a7b72103 AA |
1209 | spin_lock(&clp->cl_lock); |
1210 | cred = ops->get_state_renewal_cred_locked(clp); | |
1211 | spin_unlock(&clp->cl_lock); | |
0f605b56 TM |
1212 | if (cred == NULL) { |
1213 | cred = nfs4_get_setclientid_cred(clp); | |
1214 | if (cred == NULL) | |
1215 | goto out; | |
286d7d6a | 1216 | } |
8e69514f | 1217 | status = ops->renew_lease(clp, cred); |
0f605b56 TM |
1218 | put_rpccred(cred); |
1219 | out: | |
4f7cdf18 | 1220 | return nfs4_recovery_handle_error(clp, status); |
02860014 TM |
1221 | } |
1222 | ||
1223 | static int nfs4_reclaim_lease(struct nfs_client *clp) | |
1224 | { | |
1225 | struct rpc_cred *cred; | |
591d71cb AA |
1226 | struct nfs4_state_recovery_ops *ops = |
1227 | nfs4_reboot_recovery_ops[clp->cl_minorversion]; | |
02860014 TM |
1228 | int status = -ENOENT; |
1229 | ||
90a16617 | 1230 | cred = ops->get_clid_cred(clp); |
286d7d6a | 1231 | if (cred != NULL) { |
591d71cb | 1232 | status = ops->establish_clid(clp, cred); |
286d7d6a | 1233 | put_rpccred(cred); |
a2b2bb88 TM |
1234 | /* Handle case where the user hasn't set up machine creds */ |
1235 | if (status == -EACCES && cred == clp->cl_machine_cred) { | |
1236 | nfs4_clear_machine_cred(clp); | |
02860014 | 1237 | status = -EAGAIN; |
a2b2bb88 | 1238 | } |
c2e713dd BH |
1239 | if (status == -NFS4ERR_MINOR_VERS_MISMATCH) |
1240 | status = -EPROTONOSUPPORT; | |
286d7d6a | 1241 | } |
02860014 TM |
1242 | return status; |
1243 | } | |
1244 | ||
76db6d95 | 1245 | #ifdef CONFIG_NFS_V4_1 |
0629e370 AB |
1246 | void nfs41_handle_sequence_flag_errors(struct nfs_client *clp, u32 flags) |
1247 | { | |
1248 | if (!flags) | |
1249 | return; | |
1250 | else if (flags & SEQ4_STATUS_RESTART_RECLAIM_NEEDED) { | |
1251 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1252 | nfs4_state_start_reclaim_reboot(clp); | |
1253 | nfs4_schedule_state_recovery(clp); | |
1254 | } else if (flags & (SEQ4_STATUS_EXPIRED_ALL_STATE_REVOKED | | |
1255 | SEQ4_STATUS_EXPIRED_SOME_STATE_REVOKED | | |
1256 | SEQ4_STATUS_ADMIN_STATE_REVOKED | | |
1257 | SEQ4_STATUS_RECALLABLE_STATE_REVOKED | | |
1258 | SEQ4_STATUS_LEASE_MOVED)) { | |
1259 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1260 | nfs4_state_start_reclaim_nograce(clp); | |
1261 | nfs4_schedule_state_recovery(clp); | |
1262 | } else if (flags & (SEQ4_STATUS_CB_PATH_DOWN | | |
1263 | SEQ4_STATUS_BACKCHANNEL_FAULT | | |
1264 | SEQ4_STATUS_CB_PATH_DOWN_SESSION)) | |
1265 | nfs_expire_all_delegations(clp); | |
1266 | } | |
1267 | ||
c3fad1b1 AA |
1268 | static int nfs4_reset_session(struct nfs_client *clp) |
1269 | { | |
1270 | int status; | |
1271 | ||
1272 | status = nfs4_proc_destroy_session(clp->cl_session); | |
1273 | if (status && status != -NFS4ERR_BADSESSION && | |
1274 | status != -NFS4ERR_DEADSESSION) { | |
f455848a | 1275 | status = nfs4_recovery_handle_error(clp, status); |
c3fad1b1 AA |
1276 | goto out; |
1277 | } | |
1278 | ||
1279 | memset(clp->cl_session->sess_id.data, 0, NFS4_MAX_SESSIONID_LEN); | |
f26468fb | 1280 | status = nfs4_proc_create_session(clp); |
c3fad1b1 | 1281 | if (status) |
f455848a | 1282 | status = nfs4_recovery_handle_error(clp, status); |
9dfdf404 | 1283 | |
c3fad1b1 | 1284 | out: |
9dfdf404 RL |
1285 | /* |
1286 | * Let the state manager reestablish state | |
9dfdf404 | 1287 | */ |
5601a00d AB |
1288 | if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) && |
1289 | status == 0) | |
1290 | nfs41_setup_state_renewal(clp); | |
1291 | ||
c3fad1b1 AA |
1292 | return status; |
1293 | } | |
76db6d95 | 1294 | |
76db6d95 | 1295 | #else /* CONFIG_NFS_V4_1 */ |
c3fad1b1 | 1296 | static int nfs4_reset_session(struct nfs_client *clp) { return 0; } |
5601a00d AB |
1297 | static int nfs4_begin_drain_session(struct nfs_client *clp) { return 0; } |
1298 | static int nfs4_end_drain_session(struct nfs_client *clp) { return 0; } | |
76db6d95 AA |
1299 | #endif /* CONFIG_NFS_V4_1 */ |
1300 | ||
78722e9c AA |
1301 | /* Set NFS4CLNT_LEASE_EXPIRED for all v4.0 errors and for recoverable errors |
1302 | * on EXCHANGE_ID for v4.1 | |
1303 | */ | |
1304 | static void nfs4_set_lease_expired(struct nfs_client *clp, int status) | |
1305 | { | |
1306 | if (nfs4_has_session(clp)) { | |
1307 | switch (status) { | |
1308 | case -NFS4ERR_DELAY: | |
1309 | case -NFS4ERR_CLID_INUSE: | |
1310 | case -EAGAIN: | |
1311 | break; | |
1312 | ||
1313 | case -NFS4ERR_NOT_SAME: /* FixMe: implement recovery | |
1314 | * in nfs4_exchange_id */ | |
1315 | default: | |
1316 | return; | |
1317 | } | |
1318 | } | |
1319 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1320 | } | |
1321 | ||
e005e804 | 1322 | static void nfs4_state_manager(struct nfs_client *clp) |
02860014 | 1323 | { |
02860014 TM |
1324 | int status = 0; |
1325 | ||
02860014 | 1326 | /* Ensure exclusive access to NFSv4 state */ |
f3c76491 | 1327 | for(;;) { |
b79a4a1b TM |
1328 | if (test_and_clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) { |
1329 | /* We're going to have to re-establish a clientid */ | |
5601a00d | 1330 | nfs4_begin_drain_session(clp); |
b79a4a1b TM |
1331 | status = nfs4_reclaim_lease(clp); |
1332 | if (status) { | |
78722e9c | 1333 | nfs4_set_lease_expired(clp, status); |
b6d408ba TM |
1334 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, |
1335 | &clp->cl_state)) | |
b79a4a1b | 1336 | continue; |
76db6d95 AA |
1337 | if (clp->cl_cons_state == |
1338 | NFS_CS_SESSION_INITING) | |
1339 | nfs_mark_client_ready(clp, status); | |
b79a4a1b TM |
1340 | goto out_error; |
1341 | } | |
e598d843 | 1342 | clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); |
7cab89b2 | 1343 | set_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state); |
e598d843 TM |
1344 | } |
1345 | ||
1346 | if (test_and_clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state)) { | |
1347 | status = nfs4_check_lease(clp); | |
b6d408ba | 1348 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
e598d843 | 1349 | continue; |
b6d408ba TM |
1350 | if (status < 0 && status != -NFS4ERR_CB_PATH_DOWN) |
1351 | goto out_error; | |
b79a4a1b | 1352 | } |
b6d408ba | 1353 | |
c3fad1b1 | 1354 | /* Initialize or reset the session */ |
6df08189 | 1355 | if (test_and_clear_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state) |
7111dc73 | 1356 | && nfs4_has_session(clp)) { |
5601a00d | 1357 | nfs4_begin_drain_session(clp); |
4d643d1d | 1358 | status = nfs4_reset_session(clp); |
b6d408ba TM |
1359 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
1360 | continue; | |
1361 | if (status < 0) | |
76db6d95 | 1362 | goto out_error; |
76db6d95 | 1363 | } |
b6d408ba | 1364 | |
b79a4a1b | 1365 | /* First recover reboot state... */ |
e345e88a | 1366 | if (test_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) { |
591d71cb AA |
1367 | status = nfs4_do_reclaim(clp, |
1368 | nfs4_reboot_recovery_ops[clp->cl_minorversion]); | |
b6d408ba | 1369 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) || |
6df08189 | 1370 | test_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state)) |
c3fad1b1 | 1371 | continue; |
b79a4a1b | 1372 | nfs4_state_end_reclaim_reboot(clp); |
b6d408ba TM |
1373 | if (test_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) |
1374 | continue; | |
1375 | if (status < 0) | |
1376 | goto out_error; | |
02860014 TM |
1377 | } |
1378 | ||
b79a4a1b TM |
1379 | /* Now recover expired state... */ |
1380 | if (test_and_clear_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) { | |
591d71cb AA |
1381 | status = nfs4_do_reclaim(clp, |
1382 | nfs4_nograce_recovery_ops[clp->cl_minorversion]); | |
b6d408ba | 1383 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) || |
6df08189 | 1384 | test_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state) || |
b6d408ba TM |
1385 | test_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) |
1386 | continue; | |
1387 | if (status < 0) | |
b79a4a1b | 1388 | goto out_error; |
1da177e4 | 1389 | } |
707fb4b3 | 1390 | |
5601a00d | 1391 | nfs4_end_drain_session(clp); |
707fb4b3 TM |
1392 | if (test_and_clear_bit(NFS4CLNT_DELEGRETURN, &clp->cl_state)) { |
1393 | nfs_client_return_marked_delegations(clp); | |
1394 | continue; | |
1395 | } | |
e005e804 TM |
1396 | |
1397 | nfs4_clear_state_manager_bit(clp); | |
f3c76491 TM |
1398 | /* Did we race with an attempt to give us more work? */ |
1399 | if (clp->cl_state == 0) | |
1400 | break; | |
1401 | if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) != 0) | |
1402 | break; | |
1da177e4 | 1403 | } |
e005e804 | 1404 | return; |
1da177e4 | 1405 | out_error: |
e005e804 | 1406 | printk(KERN_WARNING "Error: state manager failed on NFSv4 server %s" |
5d8515ca | 1407 | " with error %d\n", clp->cl_hostname, -status); |
5601a00d | 1408 | nfs4_end_drain_session(clp); |
e005e804 TM |
1409 | nfs4_clear_state_manager_bit(clp); |
1410 | } | |
1411 | ||
1412 | static int nfs4_run_state_manager(void *ptr) | |
1413 | { | |
1414 | struct nfs_client *clp = ptr; | |
1415 | ||
1416 | allow_signal(SIGKILL); | |
1417 | nfs4_state_manager(clp); | |
1418 | nfs_put_client(clp); | |
1419 | module_put_and_exit(0); | |
1420 | return 0; | |
1da177e4 LT |
1421 | } |
1422 | ||
1423 | /* | |
1424 | * Local variables: | |
1425 | * c-basic-offset: 8 | |
1426 | * End: | |
1427 | */ |