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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 | 42 | #include <linux/slab.h> |
b89f4321 | 43 | #include <linux/fs.h> |
1da177e4 LT |
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> |
8c7597f6 | 49 | #include <linux/ratelimit.h> |
1da177e4 LT |
50 | #include <linux/workqueue.h> |
51 | #include <linux/bitops.h> | |
52 | ||
4ce79717 | 53 | #include "nfs4_fs.h" |
1da177e4 LT |
54 | #include "callback.h" |
55 | #include "delegation.h" | |
24c8dbbb | 56 | #include "internal.h" |
974cec8c | 57 | #include "pnfs.h" |
1da177e4 LT |
58 | |
59 | #define OPENOWNER_POOL_SIZE 8 | |
60 | ||
4ce79717 | 61 | const nfs4_stateid zero_stateid; |
1da177e4 LT |
62 | |
63 | static LIST_HEAD(nfs4_clientid_list); | |
64 | ||
591d71cb | 65 | int nfs4_init_clientid(struct nfs_client *clp, struct rpc_cred *cred) |
1da177e4 | 66 | { |
bb8b27e5 | 67 | struct nfs4_setclientid_res clid; |
f738f517 CL |
68 | unsigned short port; |
69 | int status; | |
70 | ||
71 | port = nfs_callback_tcpport; | |
72 | if (clp->cl_addr.ss_family == AF_INET6) | |
73 | port = nfs_callback_tcpport6; | |
74 | ||
bb8b27e5 TM |
75 | status = nfs4_proc_setclientid(clp, NFS4_CALLBACK, port, cred, &clid); |
76 | if (status != 0) | |
77 | goto out; | |
78 | status = nfs4_proc_setclientid_confirm(clp, &clid, cred); | |
79 | if (status != 0) | |
80 | goto out; | |
81 | clp->cl_clientid = clid.clientid; | |
82 | nfs4_schedule_state_renewal(clp); | |
83 | out: | |
1da177e4 LT |
84 | return status; |
85 | } | |
86 | ||
a7b72103 | 87 | struct rpc_cred *nfs4_get_machine_cred_locked(struct nfs_client *clp) |
a2b2bb88 TM |
88 | { |
89 | struct rpc_cred *cred = NULL; | |
90 | ||
a2b2bb88 TM |
91 | if (clp->cl_machine_cred != NULL) |
92 | cred = get_rpccred(clp->cl_machine_cred); | |
a2b2bb88 TM |
93 | return cred; |
94 | } | |
95 | ||
96 | static void nfs4_clear_machine_cred(struct nfs_client *clp) | |
97 | { | |
98 | struct rpc_cred *cred; | |
99 | ||
100 | spin_lock(&clp->cl_lock); | |
101 | cred = clp->cl_machine_cred; | |
102 | clp->cl_machine_cred = NULL; | |
103 | spin_unlock(&clp->cl_lock); | |
104 | if (cred != NULL) | |
105 | put_rpccred(cred); | |
106 | } | |
107 | ||
6dc9d57a | 108 | struct rpc_cred *nfs4_get_renew_cred_locked(struct nfs_client *clp) |
b4454fe1 TM |
109 | { |
110 | struct nfs4_state_owner *sp; | |
9f958ab8 | 111 | struct rb_node *pos; |
b4454fe1 TM |
112 | struct rpc_cred *cred = NULL; |
113 | ||
9f958ab8 TM |
114 | for (pos = rb_first(&clp->cl_state_owners); pos != NULL; pos = rb_next(pos)) { |
115 | sp = rb_entry(pos, struct nfs4_state_owner, so_client_node); | |
b4454fe1 TM |
116 | if (list_empty(&sp->so_states)) |
117 | continue; | |
118 | cred = get_rpccred(sp->so_cred); | |
119 | break; | |
120 | } | |
121 | return cred; | |
122 | } | |
123 | ||
b4b82607 AA |
124 | #if defined(CONFIG_NFS_V4_1) |
125 | ||
9430fb6b RL |
126 | static int nfs41_setup_state_renewal(struct nfs_client *clp) |
127 | { | |
128 | int status; | |
129 | struct nfs_fsinfo fsinfo; | |
130 | ||
131 | status = nfs4_proc_get_lease_time(clp, &fsinfo); | |
132 | if (status == 0) { | |
133 | /* Update lease time and schedule renewal */ | |
134 | spin_lock(&clp->cl_lock); | |
135 | clp->cl_lease_time = fsinfo.lease_time * HZ; | |
136 | clp->cl_last_renewal = jiffies; | |
137 | spin_unlock(&clp->cl_lock); | |
138 | ||
139 | nfs4_schedule_state_renewal(clp); | |
140 | } | |
141 | ||
142 | return status; | |
143 | } | |
144 | ||
5601a00d | 145 | static void nfs4_end_drain_session(struct nfs_client *clp) |
9dfdf404 | 146 | { |
5601a00d | 147 | struct nfs4_session *ses = clp->cl_session; |
689cf5c1 AB |
148 | int max_slots; |
149 | ||
a2118c33 TM |
150 | if (ses == NULL) |
151 | return; | |
152 | if (test_and_clear_bit(NFS4_SESSION_DRAINING, &ses->session_state)) { | |
689cf5c1 AB |
153 | spin_lock(&ses->fc_slot_table.slot_tbl_lock); |
154 | max_slots = ses->fc_slot_table.max_slots; | |
155 | while (max_slots--) { | |
156 | struct rpc_task *task; | |
157 | ||
158 | task = rpc_wake_up_next(&ses->fc_slot_table. | |
159 | slot_tbl_waitq); | |
160 | if (!task) | |
161 | break; | |
162 | rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED); | |
163 | } | |
164 | spin_unlock(&ses->fc_slot_table.slot_tbl_lock); | |
165 | } | |
9dfdf404 RL |
166 | } |
167 | ||
5601a00d | 168 | static int nfs4_begin_drain_session(struct nfs_client *clp) |
9dfdf404 | 169 | { |
5601a00d | 170 | struct nfs4_session *ses = clp->cl_session; |
9dfdf404 RL |
171 | struct nfs4_slot_table *tbl = &ses->fc_slot_table; |
172 | ||
173 | spin_lock(&tbl->slot_tbl_lock); | |
a2118c33 | 174 | set_bit(NFS4_SESSION_DRAINING, &ses->session_state); |
9dfdf404 RL |
175 | if (tbl->highest_used_slotid != -1) { |
176 | INIT_COMPLETION(ses->complete); | |
177 | spin_unlock(&tbl->slot_tbl_lock); | |
178 | return wait_for_completion_interruptible(&ses->complete); | |
179 | } | |
180 | spin_unlock(&tbl->slot_tbl_lock); | |
181 | return 0; | |
182 | } | |
183 | ||
4d643d1d AA |
184 | int nfs41_init_clientid(struct nfs_client *clp, struct rpc_cred *cred) |
185 | { | |
186 | int status; | |
187 | ||
38045412 | 188 | nfs4_begin_drain_session(clp); |
4d643d1d | 189 | status = nfs4_proc_exchange_id(clp, cred); |
9430fb6b RL |
190 | if (status != 0) |
191 | goto out; | |
192 | status = nfs4_proc_create_session(clp); | |
193 | if (status != 0) | |
194 | goto out; | |
2c2618c6 AA |
195 | status = nfs4_set_callback_sessionid(clp); |
196 | if (status != 0) { | |
197 | printk(KERN_WARNING "Sessionid not set. No callback service\n"); | |
198 | nfs_callback_down(1); | |
199 | status = 0; | |
200 | } | |
9430fb6b RL |
201 | nfs41_setup_state_renewal(clp); |
202 | nfs_mark_client_ready(clp, NFS_CS_READY); | |
203 | out: | |
4d643d1d AA |
204 | return status; |
205 | } | |
206 | ||
b4b82607 AA |
207 | struct rpc_cred *nfs4_get_exchange_id_cred(struct nfs_client *clp) |
208 | { | |
209 | struct rpc_cred *cred; | |
210 | ||
211 | spin_lock(&clp->cl_lock); | |
212 | cred = nfs4_get_machine_cred_locked(clp); | |
213 | spin_unlock(&clp->cl_lock); | |
214 | return cred; | |
215 | } | |
216 | ||
217 | #endif /* CONFIG_NFS_V4_1 */ | |
218 | ||
a7b72103 | 219 | struct rpc_cred *nfs4_get_setclientid_cred(struct nfs_client *clp) |
286d7d6a TM |
220 | { |
221 | struct nfs4_state_owner *sp; | |
9f958ab8 | 222 | struct rb_node *pos; |
a2b2bb88 | 223 | struct rpc_cred *cred; |
286d7d6a | 224 | |
6dc9d57a TM |
225 | spin_lock(&clp->cl_lock); |
226 | cred = nfs4_get_machine_cred_locked(clp); | |
a2b2bb88 TM |
227 | if (cred != NULL) |
228 | goto out; | |
9f958ab8 TM |
229 | pos = rb_first(&clp->cl_state_owners); |
230 | if (pos != NULL) { | |
231 | sp = rb_entry(pos, struct nfs4_state_owner, so_client_node); | |
a2b2bb88 | 232 | cred = get_rpccred(sp->so_cred); |
286d7d6a | 233 | } |
a2b2bb88 | 234 | out: |
6dc9d57a | 235 | spin_unlock(&clp->cl_lock); |
a2b2bb88 | 236 | return cred; |
286d7d6a TM |
237 | } |
238 | ||
9f958ab8 TM |
239 | static void nfs_alloc_unique_id(struct rb_root *root, struct nfs_unique_id *new, |
240 | __u64 minval, int maxbits) | |
241 | { | |
242 | struct rb_node **p, *parent; | |
243 | struct nfs_unique_id *pos; | |
244 | __u64 mask = ~0ULL; | |
245 | ||
246 | if (maxbits < 64) | |
247 | mask = (1ULL << maxbits) - 1ULL; | |
248 | ||
249 | /* Ensure distribution is more or less flat */ | |
250 | get_random_bytes(&new->id, sizeof(new->id)); | |
251 | new->id &= mask; | |
252 | if (new->id < minval) | |
253 | new->id += minval; | |
254 | retry: | |
255 | p = &root->rb_node; | |
256 | parent = NULL; | |
257 | ||
258 | while (*p != NULL) { | |
259 | parent = *p; | |
260 | pos = rb_entry(parent, struct nfs_unique_id, rb_node); | |
261 | ||
262 | if (new->id < pos->id) | |
263 | p = &(*p)->rb_left; | |
264 | else if (new->id > pos->id) | |
265 | p = &(*p)->rb_right; | |
266 | else | |
267 | goto id_exists; | |
268 | } | |
269 | rb_link_node(&new->rb_node, parent, p); | |
270 | rb_insert_color(&new->rb_node, root); | |
271 | return; | |
272 | id_exists: | |
273 | for (;;) { | |
274 | new->id++; | |
275 | if (new->id < minval || (new->id & mask) != new->id) { | |
276 | new->id = minval; | |
277 | break; | |
278 | } | |
279 | parent = rb_next(parent); | |
280 | if (parent == NULL) | |
281 | break; | |
282 | pos = rb_entry(parent, struct nfs_unique_id, rb_node); | |
283 | if (new->id < pos->id) | |
284 | break; | |
285 | } | |
286 | goto retry; | |
287 | } | |
288 | ||
289 | static void nfs_free_unique_id(struct rb_root *root, struct nfs_unique_id *id) | |
290 | { | |
291 | rb_erase(&id->rb_node, root); | |
292 | } | |
293 | ||
1da177e4 | 294 | static struct nfs4_state_owner * |
6f2e64d3 | 295 | nfs4_find_state_owner(struct nfs_server *server, struct rpc_cred *cred) |
1da177e4 | 296 | { |
6f2e64d3 | 297 | struct nfs_client *clp = server->nfs_client; |
9f958ab8 TM |
298 | struct rb_node **p = &clp->cl_state_owners.rb_node, |
299 | *parent = NULL; | |
1da177e4 LT |
300 | struct nfs4_state_owner *sp, *res = NULL; |
301 | ||
9f958ab8 TM |
302 | while (*p != NULL) { |
303 | parent = *p; | |
304 | sp = rb_entry(parent, struct nfs4_state_owner, so_client_node); | |
305 | ||
6f2e64d3 TM |
306 | if (server < sp->so_server) { |
307 | p = &parent->rb_left; | |
308 | continue; | |
309 | } | |
310 | if (server > sp->so_server) { | |
311 | p = &parent->rb_right; | |
312 | continue; | |
313 | } | |
9f958ab8 TM |
314 | if (cred < sp->so_cred) |
315 | p = &parent->rb_left; | |
316 | else if (cred > sp->so_cred) | |
317 | p = &parent->rb_right; | |
318 | else { | |
319 | atomic_inc(&sp->so_count); | |
320 | res = sp; | |
321 | break; | |
322 | } | |
1da177e4 LT |
323 | } |
324 | return res; | |
325 | } | |
326 | ||
9f958ab8 TM |
327 | static struct nfs4_state_owner * |
328 | nfs4_insert_state_owner(struct nfs_client *clp, struct nfs4_state_owner *new) | |
329 | { | |
330 | struct rb_node **p = &clp->cl_state_owners.rb_node, | |
331 | *parent = NULL; | |
332 | struct nfs4_state_owner *sp; | |
333 | ||
334 | while (*p != NULL) { | |
335 | parent = *p; | |
336 | sp = rb_entry(parent, struct nfs4_state_owner, so_client_node); | |
337 | ||
6f2e64d3 TM |
338 | if (new->so_server < sp->so_server) { |
339 | p = &parent->rb_left; | |
340 | continue; | |
341 | } | |
342 | if (new->so_server > sp->so_server) { | |
343 | p = &parent->rb_right; | |
344 | continue; | |
345 | } | |
9f958ab8 TM |
346 | if (new->so_cred < sp->so_cred) |
347 | p = &parent->rb_left; | |
348 | else if (new->so_cred > sp->so_cred) | |
349 | p = &parent->rb_right; | |
350 | else { | |
351 | atomic_inc(&sp->so_count); | |
352 | return sp; | |
353 | } | |
354 | } | |
355 | nfs_alloc_unique_id(&clp->cl_openowner_id, &new->so_owner_id, 1, 64); | |
356 | rb_link_node(&new->so_client_node, parent, p); | |
357 | rb_insert_color(&new->so_client_node, &clp->cl_state_owners); | |
358 | return new; | |
359 | } | |
360 | ||
361 | static void | |
362 | nfs4_remove_state_owner(struct nfs_client *clp, struct nfs4_state_owner *sp) | |
363 | { | |
364 | if (!RB_EMPTY_NODE(&sp->so_client_node)) | |
365 | rb_erase(&sp->so_client_node, &clp->cl_state_owners); | |
366 | nfs_free_unique_id(&clp->cl_openowner_id, &sp->so_owner_id); | |
367 | } | |
368 | ||
1da177e4 LT |
369 | /* |
370 | * nfs4_alloc_state_owner(): this is called on the OPEN or CREATE path to | |
371 | * create a new state_owner. | |
372 | * | |
373 | */ | |
374 | static struct nfs4_state_owner * | |
375 | nfs4_alloc_state_owner(void) | |
376 | { | |
377 | struct nfs4_state_owner *sp; | |
378 | ||
8535b2be | 379 | sp = kzalloc(sizeof(*sp),GFP_NOFS); |
1da177e4 LT |
380 | if (!sp) |
381 | return NULL; | |
ec073428 | 382 | spin_lock_init(&sp->so_lock); |
1da177e4 | 383 | INIT_LIST_HEAD(&sp->so_states); |
cee54fc9 TM |
384 | rpc_init_wait_queue(&sp->so_sequence.wait, "Seqid_waitqueue"); |
385 | sp->so_seqid.sequence = &sp->so_sequence; | |
386 | spin_lock_init(&sp->so_sequence.lock); | |
387 | INIT_LIST_HEAD(&sp->so_sequence.list); | |
1da177e4 LT |
388 | atomic_set(&sp->so_count, 1); |
389 | return sp; | |
390 | } | |
391 | ||
1d2e88e7 | 392 | static void |
1da177e4 LT |
393 | nfs4_drop_state_owner(struct nfs4_state_owner *sp) |
394 | { | |
9f958ab8 | 395 | if (!RB_EMPTY_NODE(&sp->so_client_node)) { |
1f0e890d | 396 | struct nfs_client *clp = sp->so_server->nfs_client; |
9f958ab8 TM |
397 | |
398 | spin_lock(&clp->cl_lock); | |
399 | rb_erase(&sp->so_client_node, &clp->cl_state_owners); | |
400 | RB_CLEAR_NODE(&sp->so_client_node); | |
401 | spin_unlock(&clp->cl_lock); | |
402 | } | |
1da177e4 LT |
403 | } |
404 | ||
1da177e4 LT |
405 | struct nfs4_state_owner *nfs4_get_state_owner(struct nfs_server *server, struct rpc_cred *cred) |
406 | { | |
7539bbab | 407 | struct nfs_client *clp = server->nfs_client; |
1da177e4 LT |
408 | struct nfs4_state_owner *sp, *new; |
409 | ||
1da177e4 | 410 | spin_lock(&clp->cl_lock); |
6f2e64d3 | 411 | sp = nfs4_find_state_owner(server, cred); |
1da177e4 | 412 | spin_unlock(&clp->cl_lock); |
1da177e4 LT |
413 | if (sp != NULL) |
414 | return sp; | |
9f958ab8 TM |
415 | new = nfs4_alloc_state_owner(); |
416 | if (new == NULL) | |
417 | return NULL; | |
6f2e64d3 | 418 | new->so_server = server; |
9f958ab8 TM |
419 | new->so_cred = cred; |
420 | spin_lock(&clp->cl_lock); | |
421 | sp = nfs4_insert_state_owner(clp, new); | |
422 | spin_unlock(&clp->cl_lock); | |
423 | if (sp == new) | |
424 | get_rpccred(cred); | |
f6a1cc89 TM |
425 | else { |
426 | rpc_destroy_wait_queue(&new->so_sequence.wait); | |
9f958ab8 | 427 | kfree(new); |
f6a1cc89 | 428 | } |
9f958ab8 | 429 | return sp; |
1da177e4 LT |
430 | } |
431 | ||
1da177e4 LT |
432 | void nfs4_put_state_owner(struct nfs4_state_owner *sp) |
433 | { | |
1f0e890d | 434 | struct nfs_client *clp = sp->so_server->nfs_client; |
1da177e4 LT |
435 | struct rpc_cred *cred = sp->so_cred; |
436 | ||
437 | if (!atomic_dec_and_lock(&sp->so_count, &clp->cl_lock)) | |
438 | return; | |
9f958ab8 | 439 | nfs4_remove_state_owner(clp, sp); |
1da177e4 | 440 | spin_unlock(&clp->cl_lock); |
f6a1cc89 | 441 | rpc_destroy_wait_queue(&sp->so_sequence.wait); |
1da177e4 LT |
442 | put_rpccred(cred); |
443 | kfree(sp); | |
444 | } | |
445 | ||
446 | static struct nfs4_state * | |
447 | nfs4_alloc_open_state(void) | |
448 | { | |
449 | struct nfs4_state *state; | |
450 | ||
8535b2be | 451 | state = kzalloc(sizeof(*state), GFP_NOFS); |
1da177e4 LT |
452 | if (!state) |
453 | return NULL; | |
1da177e4 LT |
454 | atomic_set(&state->count, 1); |
455 | INIT_LIST_HEAD(&state->lock_states); | |
8d0a8a9d | 456 | spin_lock_init(&state->state_lock); |
8bda4e4c | 457 | seqlock_init(&state->seqlock); |
1da177e4 LT |
458 | return state; |
459 | } | |
460 | ||
4cecb76f | 461 | void |
dc0b027d | 462 | nfs4_state_set_mode_locked(struct nfs4_state *state, fmode_t fmode) |
4cecb76f | 463 | { |
dc0b027d | 464 | if (state->state == fmode) |
4cecb76f TM |
465 | return; |
466 | /* NB! List reordering - see the reclaim code for why. */ | |
dc0b027d TM |
467 | if ((fmode & FMODE_WRITE) != (state->state & FMODE_WRITE)) { |
468 | if (fmode & FMODE_WRITE) | |
4cecb76f TM |
469 | list_move(&state->open_states, &state->owner->so_states); |
470 | else | |
471 | list_move_tail(&state->open_states, &state->owner->so_states); | |
472 | } | |
dc0b027d | 473 | state->state = fmode; |
4cecb76f TM |
474 | } |
475 | ||
1da177e4 LT |
476 | static struct nfs4_state * |
477 | __nfs4_find_state_byowner(struct inode *inode, struct nfs4_state_owner *owner) | |
478 | { | |
479 | struct nfs_inode *nfsi = NFS_I(inode); | |
480 | struct nfs4_state *state; | |
481 | ||
482 | list_for_each_entry(state, &nfsi->open_states, inode_states) { | |
1c816efa | 483 | if (state->owner != owner) |
1da177e4 | 484 | continue; |
1c816efa | 485 | if (atomic_inc_not_zero(&state->count)) |
1da177e4 | 486 | return state; |
1da177e4 LT |
487 | } |
488 | return NULL; | |
489 | } | |
490 | ||
1da177e4 LT |
491 | static void |
492 | nfs4_free_open_state(struct nfs4_state *state) | |
493 | { | |
494 | kfree(state); | |
495 | } | |
496 | ||
497 | struct nfs4_state * | |
498 | nfs4_get_open_state(struct inode *inode, struct nfs4_state_owner *owner) | |
499 | { | |
500 | struct nfs4_state *state, *new; | |
501 | struct nfs_inode *nfsi = NFS_I(inode); | |
502 | ||
503 | spin_lock(&inode->i_lock); | |
504 | state = __nfs4_find_state_byowner(inode, owner); | |
505 | spin_unlock(&inode->i_lock); | |
506 | if (state) | |
507 | goto out; | |
508 | new = nfs4_alloc_open_state(); | |
ec073428 | 509 | spin_lock(&owner->so_lock); |
1da177e4 LT |
510 | spin_lock(&inode->i_lock); |
511 | state = __nfs4_find_state_byowner(inode, owner); | |
512 | if (state == NULL && new != NULL) { | |
513 | state = new; | |
1da177e4 LT |
514 | state->owner = owner; |
515 | atomic_inc(&owner->so_count); | |
516 | list_add(&state->inode_states, &nfsi->open_states); | |
517 | state->inode = igrab(inode); | |
518 | spin_unlock(&inode->i_lock); | |
ec073428 TM |
519 | /* Note: The reclaim code dictates that we add stateless |
520 | * and read-only stateids to the end of the list */ | |
521 | list_add_tail(&state->open_states, &owner->so_states); | |
522 | spin_unlock(&owner->so_lock); | |
1da177e4 LT |
523 | } else { |
524 | spin_unlock(&inode->i_lock); | |
ec073428 | 525 | spin_unlock(&owner->so_lock); |
1da177e4 LT |
526 | if (new) |
527 | nfs4_free_open_state(new); | |
528 | } | |
529 | out: | |
530 | return state; | |
531 | } | |
532 | ||
1da177e4 LT |
533 | void nfs4_put_open_state(struct nfs4_state *state) |
534 | { | |
535 | struct inode *inode = state->inode; | |
536 | struct nfs4_state_owner *owner = state->owner; | |
537 | ||
ec073428 | 538 | if (!atomic_dec_and_lock(&state->count, &owner->so_lock)) |
1da177e4 | 539 | return; |
ec073428 | 540 | spin_lock(&inode->i_lock); |
ba683031 | 541 | list_del(&state->inode_states); |
1da177e4 | 542 | list_del(&state->open_states); |
ec073428 TM |
543 | spin_unlock(&inode->i_lock); |
544 | spin_unlock(&owner->so_lock); | |
1da177e4 | 545 | iput(inode); |
1da177e4 LT |
546 | nfs4_free_open_state(state); |
547 | nfs4_put_state_owner(owner); | |
548 | } | |
549 | ||
550 | /* | |
83c9d41e | 551 | * Close the current file. |
1da177e4 | 552 | */ |
8535b2be TM |
553 | static void __nfs4_close(struct path *path, struct nfs4_state *state, |
554 | fmode_t fmode, gfp_t gfp_mask, int wait) | |
1da177e4 | 555 | { |
1da177e4 | 556 | struct nfs4_state_owner *owner = state->owner; |
003707c7 | 557 | int call_close = 0; |
dc0b027d | 558 | fmode_t newstate; |
1da177e4 LT |
559 | |
560 | atomic_inc(&owner->so_count); | |
1da177e4 | 561 | /* Protect against nfs4_find_state() */ |
ec073428 | 562 | spin_lock(&owner->so_lock); |
dc0b027d | 563 | switch (fmode & (FMODE_READ | FMODE_WRITE)) { |
e7616923 TM |
564 | case FMODE_READ: |
565 | state->n_rdonly--; | |
566 | break; | |
567 | case FMODE_WRITE: | |
568 | state->n_wronly--; | |
569 | break; | |
570 | case FMODE_READ|FMODE_WRITE: | |
571 | state->n_rdwr--; | |
572 | } | |
003707c7 | 573 | newstate = FMODE_READ|FMODE_WRITE; |
e7616923 | 574 | if (state->n_rdwr == 0) { |
003707c7 | 575 | if (state->n_rdonly == 0) { |
e7616923 | 576 | newstate &= ~FMODE_READ; |
003707c7 TM |
577 | call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags); |
578 | call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); | |
579 | } | |
580 | if (state->n_wronly == 0) { | |
e7616923 | 581 | newstate &= ~FMODE_WRITE; |
003707c7 TM |
582 | call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags); |
583 | call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); | |
584 | } | |
585 | if (newstate == 0) | |
586 | clear_bit(NFS_DELEGATED_STATE, &state->flags); | |
e7616923 | 587 | } |
003707c7 | 588 | nfs4_state_set_mode_locked(state, newstate); |
ec073428 | 589 | spin_unlock(&owner->so_lock); |
4cecb76f | 590 | |
003707c7 | 591 | if (!call_close) { |
b39e625b TM |
592 | nfs4_put_open_state(state); |
593 | nfs4_put_state_owner(owner); | |
594 | } else | |
8535b2be | 595 | nfs4_do_close(path, state, gfp_mask, wait); |
a49c3c77 TM |
596 | } |
597 | ||
dc0b027d | 598 | void nfs4_close_state(struct path *path, struct nfs4_state *state, fmode_t fmode) |
a49c3c77 | 599 | { |
8535b2be | 600 | __nfs4_close(path, state, fmode, GFP_NOFS, 0); |
a49c3c77 TM |
601 | } |
602 | ||
dc0b027d | 603 | void nfs4_close_sync(struct path *path, struct nfs4_state *state, fmode_t fmode) |
a49c3c77 | 604 | { |
8535b2be | 605 | __nfs4_close(path, state, fmode, GFP_KERNEL, 1); |
1da177e4 LT |
606 | } |
607 | ||
608 | /* | |
609 | * Search the state->lock_states for an existing lock_owner | |
610 | * that is compatible with current->files | |
611 | */ | |
612 | static struct nfs4_lock_state * | |
77041ed9 | 613 | __nfs4_find_lock_state(struct nfs4_state *state, fl_owner_t fl_owner, pid_t fl_pid, unsigned int type) |
1da177e4 LT |
614 | { |
615 | struct nfs4_lock_state *pos; | |
616 | list_for_each_entry(pos, &state->lock_states, ls_locks) { | |
77041ed9 | 617 | if (type != NFS4_ANY_LOCK_TYPE && pos->ls_owner.lo_type != type) |
1da177e4 | 618 | continue; |
77041ed9 TM |
619 | switch (pos->ls_owner.lo_type) { |
620 | case NFS4_POSIX_LOCK_TYPE: | |
621 | if (pos->ls_owner.lo_u.posix_owner != fl_owner) | |
622 | continue; | |
623 | break; | |
624 | case NFS4_FLOCK_LOCK_TYPE: | |
625 | if (pos->ls_owner.lo_u.flock_owner != fl_pid) | |
626 | continue; | |
627 | } | |
1da177e4 LT |
628 | atomic_inc(&pos->ls_count); |
629 | return pos; | |
630 | } | |
631 | return NULL; | |
632 | } | |
633 | ||
1da177e4 LT |
634 | /* |
635 | * Return a compatible lock_state. If no initialized lock_state structure | |
636 | * exists, return an uninitialized one. | |
637 | * | |
1da177e4 | 638 | */ |
77041ed9 | 639 | static struct nfs4_lock_state *nfs4_alloc_lock_state(struct nfs4_state *state, fl_owner_t fl_owner, pid_t fl_pid, unsigned int type) |
1da177e4 LT |
640 | { |
641 | struct nfs4_lock_state *lsp; | |
1f0e890d | 642 | struct nfs_client *clp = state->owner->so_server->nfs_client; |
1da177e4 | 643 | |
8535b2be | 644 | lsp = kzalloc(sizeof(*lsp), GFP_NOFS); |
1da177e4 LT |
645 | if (lsp == NULL) |
646 | return NULL; | |
d0dc3701 TM |
647 | rpc_init_wait_queue(&lsp->ls_sequence.wait, "lock_seqid_waitqueue"); |
648 | spin_lock_init(&lsp->ls_sequence.lock); | |
649 | INIT_LIST_HEAD(&lsp->ls_sequence.list); | |
650 | lsp->ls_seqid.sequence = &lsp->ls_sequence; | |
1da177e4 | 651 | atomic_set(&lsp->ls_count, 1); |
b64aec8d | 652 | lsp->ls_state = state; |
77041ed9 TM |
653 | lsp->ls_owner.lo_type = type; |
654 | switch (lsp->ls_owner.lo_type) { | |
655 | case NFS4_FLOCK_LOCK_TYPE: | |
656 | lsp->ls_owner.lo_u.flock_owner = fl_pid; | |
657 | break; | |
658 | case NFS4_POSIX_LOCK_TYPE: | |
659 | lsp->ls_owner.lo_u.posix_owner = fl_owner; | |
660 | break; | |
661 | default: | |
662 | kfree(lsp); | |
663 | return NULL; | |
664 | } | |
1da177e4 | 665 | spin_lock(&clp->cl_lock); |
9f958ab8 | 666 | nfs_alloc_unique_id(&clp->cl_lockowner_id, &lsp->ls_id, 1, 64); |
1da177e4 | 667 | spin_unlock(&clp->cl_lock); |
8d0a8a9d | 668 | INIT_LIST_HEAD(&lsp->ls_locks); |
1da177e4 LT |
669 | return lsp; |
670 | } | |
671 | ||
9f958ab8 TM |
672 | static void nfs4_free_lock_state(struct nfs4_lock_state *lsp) |
673 | { | |
1f0e890d | 674 | struct nfs_client *clp = lsp->ls_state->owner->so_server->nfs_client; |
9f958ab8 TM |
675 | |
676 | spin_lock(&clp->cl_lock); | |
677 | nfs_free_unique_id(&clp->cl_lockowner_id, &lsp->ls_id); | |
678 | spin_unlock(&clp->cl_lock); | |
f6a1cc89 | 679 | rpc_destroy_wait_queue(&lsp->ls_sequence.wait); |
9f958ab8 TM |
680 | kfree(lsp); |
681 | } | |
682 | ||
1da177e4 LT |
683 | /* |
684 | * Return a compatible lock_state. If no initialized lock_state structure | |
685 | * exists, return an uninitialized one. | |
686 | * | |
1da177e4 | 687 | */ |
77041ed9 | 688 | static struct nfs4_lock_state *nfs4_get_lock_state(struct nfs4_state *state, fl_owner_t owner, pid_t pid, unsigned int type) |
1da177e4 | 689 | { |
8d0a8a9d | 690 | struct nfs4_lock_state *lsp, *new = NULL; |
1da177e4 | 691 | |
8d0a8a9d TM |
692 | for(;;) { |
693 | spin_lock(&state->state_lock); | |
77041ed9 | 694 | lsp = __nfs4_find_lock_state(state, owner, pid, type); |
8d0a8a9d TM |
695 | if (lsp != NULL) |
696 | break; | |
697 | if (new != NULL) { | |
8d0a8a9d TM |
698 | list_add(&new->ls_locks, &state->lock_states); |
699 | set_bit(LK_STATE_IN_USE, &state->flags); | |
700 | lsp = new; | |
701 | new = NULL; | |
702 | break; | |
703 | } | |
704 | spin_unlock(&state->state_lock); | |
77041ed9 | 705 | new = nfs4_alloc_lock_state(state, owner, pid, type); |
8d0a8a9d TM |
706 | if (new == NULL) |
707 | return NULL; | |
708 | } | |
709 | spin_unlock(&state->state_lock); | |
9f958ab8 TM |
710 | if (new != NULL) |
711 | nfs4_free_lock_state(new); | |
1da177e4 LT |
712 | return lsp; |
713 | } | |
714 | ||
715 | /* | |
8d0a8a9d TM |
716 | * Release reference to lock_state, and free it if we see that |
717 | * it is no longer in use | |
1da177e4 | 718 | */ |
faf5f49c | 719 | void nfs4_put_lock_state(struct nfs4_lock_state *lsp) |
1da177e4 | 720 | { |
8d0a8a9d | 721 | struct nfs4_state *state; |
1da177e4 | 722 | |
8d0a8a9d TM |
723 | if (lsp == NULL) |
724 | return; | |
725 | state = lsp->ls_state; | |
726 | if (!atomic_dec_and_lock(&lsp->ls_count, &state->state_lock)) | |
727 | return; | |
728 | list_del(&lsp->ls_locks); | |
729 | if (list_empty(&state->lock_states)) | |
730 | clear_bit(LK_STATE_IN_USE, &state->flags); | |
731 | spin_unlock(&state->state_lock); | |
d3c7b7cc TM |
732 | if (lsp->ls_flags & NFS_LOCK_INITIALIZED) |
733 | nfs4_release_lockowner(lsp); | |
9f958ab8 | 734 | nfs4_free_lock_state(lsp); |
1da177e4 LT |
735 | } |
736 | ||
8d0a8a9d | 737 | static void nfs4_fl_copy_lock(struct file_lock *dst, struct file_lock *src) |
1da177e4 | 738 | { |
8d0a8a9d | 739 | struct nfs4_lock_state *lsp = src->fl_u.nfs4_fl.owner; |
1da177e4 | 740 | |
8d0a8a9d TM |
741 | dst->fl_u.nfs4_fl.owner = lsp; |
742 | atomic_inc(&lsp->ls_count); | |
743 | } | |
1da177e4 | 744 | |
8d0a8a9d | 745 | static void nfs4_fl_release_lock(struct file_lock *fl) |
1da177e4 | 746 | { |
8d0a8a9d | 747 | nfs4_put_lock_state(fl->fl_u.nfs4_fl.owner); |
1da177e4 LT |
748 | } |
749 | ||
6aed6285 | 750 | static const struct file_lock_operations nfs4_fl_lock_ops = { |
8d0a8a9d TM |
751 | .fl_copy_lock = nfs4_fl_copy_lock, |
752 | .fl_release_private = nfs4_fl_release_lock, | |
753 | }; | |
754 | ||
755 | int nfs4_set_lock_state(struct nfs4_state *state, struct file_lock *fl) | |
1da177e4 | 756 | { |
8d0a8a9d TM |
757 | struct nfs4_lock_state *lsp; |
758 | ||
759 | if (fl->fl_ops != NULL) | |
760 | return 0; | |
77041ed9 TM |
761 | if (fl->fl_flags & FL_POSIX) |
762 | lsp = nfs4_get_lock_state(state, fl->fl_owner, 0, NFS4_POSIX_LOCK_TYPE); | |
763 | else if (fl->fl_flags & FL_FLOCK) | |
764 | lsp = nfs4_get_lock_state(state, 0, fl->fl_pid, NFS4_FLOCK_LOCK_TYPE); | |
765 | else | |
766 | return -EINVAL; | |
8d0a8a9d TM |
767 | if (lsp == NULL) |
768 | return -ENOMEM; | |
769 | fl->fl_u.nfs4_fl.owner = lsp; | |
770 | fl->fl_ops = &nfs4_fl_lock_ops; | |
771 | return 0; | |
1da177e4 LT |
772 | } |
773 | ||
8d0a8a9d TM |
774 | /* |
775 | * Byte-range lock aware utility to initialize the stateid of read/write | |
776 | * requests. | |
1da177e4 | 777 | */ |
77041ed9 | 778 | void nfs4_copy_stateid(nfs4_stateid *dst, struct nfs4_state *state, fl_owner_t fl_owner, pid_t fl_pid) |
1da177e4 | 779 | { |
8d0a8a9d | 780 | struct nfs4_lock_state *lsp; |
8bda4e4c | 781 | int seq; |
1da177e4 | 782 | |
8bda4e4c TM |
783 | do { |
784 | seq = read_seqbegin(&state->seqlock); | |
785 | memcpy(dst, &state->stateid, sizeof(*dst)); | |
786 | } while (read_seqretry(&state->seqlock, seq)); | |
8d0a8a9d TM |
787 | if (test_bit(LK_STATE_IN_USE, &state->flags) == 0) |
788 | return; | |
1da177e4 | 789 | |
8d0a8a9d | 790 | spin_lock(&state->state_lock); |
77041ed9 | 791 | lsp = __nfs4_find_lock_state(state, fl_owner, fl_pid, NFS4_ANY_LOCK_TYPE); |
8d0a8a9d TM |
792 | if (lsp != NULL && (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0) |
793 | memcpy(dst, &lsp->ls_stateid, sizeof(*dst)); | |
794 | spin_unlock(&state->state_lock); | |
1da177e4 LT |
795 | nfs4_put_lock_state(lsp); |
796 | } | |
797 | ||
8535b2be | 798 | struct nfs_seqid *nfs_alloc_seqid(struct nfs_seqid_counter *counter, gfp_t gfp_mask) |
cee54fc9 | 799 | { |
cee54fc9 TM |
800 | struct nfs_seqid *new; |
801 | ||
8535b2be | 802 | new = kmalloc(sizeof(*new), gfp_mask); |
cee54fc9 TM |
803 | if (new != NULL) { |
804 | new->sequence = counter; | |
2f74c0a0 | 805 | INIT_LIST_HEAD(&new->list); |
cee54fc9 TM |
806 | } |
807 | return new; | |
808 | } | |
809 | ||
72211dbe | 810 | void nfs_release_seqid(struct nfs_seqid *seqid) |
1da177e4 | 811 | { |
2f74c0a0 TM |
812 | if (!list_empty(&seqid->list)) { |
813 | struct rpc_sequence *sequence = seqid->sequence->sequence; | |
cee54fc9 | 814 | |
2f74c0a0 | 815 | spin_lock(&sequence->lock); |
72211dbe | 816 | list_del_init(&seqid->list); |
2f74c0a0 TM |
817 | spin_unlock(&sequence->lock); |
818 | rpc_wake_up(&sequence->wait); | |
819 | } | |
72211dbe TM |
820 | } |
821 | ||
822 | void nfs_free_seqid(struct nfs_seqid *seqid) | |
823 | { | |
824 | nfs_release_seqid(seqid); | |
cee54fc9 | 825 | kfree(seqid); |
1da177e4 LT |
826 | } |
827 | ||
828 | /* | |
cee54fc9 TM |
829 | * Increment the seqid if the OPEN/OPEN_DOWNGRADE/CLOSE succeeded, or |
830 | * failed with a seqid incrementing error - | |
831 | * see comments nfs_fs.h:seqid_mutating_error() | |
832 | */ | |
88d90939 | 833 | static void nfs_increment_seqid(int status, struct nfs_seqid *seqid) |
cee54fc9 | 834 | { |
2f74c0a0 | 835 | BUG_ON(list_first_entry(&seqid->sequence->sequence->list, struct nfs_seqid, list) != seqid); |
cee54fc9 TM |
836 | switch (status) { |
837 | case 0: | |
838 | break; | |
839 | case -NFS4ERR_BAD_SEQID: | |
6f43ddcc TM |
840 | if (seqid->sequence->flags & NFS_SEQID_CONFIRMED) |
841 | return; | |
842 | printk(KERN_WARNING "NFS: v4 server returned a bad" | |
497799e7 DM |
843 | " sequence-id error on an" |
844 | " unconfirmed sequence %p!\n", | |
6f43ddcc | 845 | seqid->sequence); |
cee54fc9 TM |
846 | case -NFS4ERR_STALE_CLIENTID: |
847 | case -NFS4ERR_STALE_STATEID: | |
848 | case -NFS4ERR_BAD_STATEID: | |
849 | case -NFS4ERR_BADXDR: | |
850 | case -NFS4ERR_RESOURCE: | |
851 | case -NFS4ERR_NOFILEHANDLE: | |
852 | /* Non-seqid mutating errors */ | |
853 | return; | |
854 | }; | |
855 | /* | |
856 | * Note: no locking needed as we are guaranteed to be first | |
857 | * on the sequence list | |
858 | */ | |
859 | seqid->sequence->counter++; | |
860 | } | |
861 | ||
862 | void nfs_increment_open_seqid(int status, struct nfs_seqid *seqid) | |
863 | { | |
34dc1ad7 BH |
864 | struct nfs4_state_owner *sp = container_of(seqid->sequence, |
865 | struct nfs4_state_owner, so_seqid); | |
866 | struct nfs_server *server = sp->so_server; | |
867 | ||
868 | if (status == -NFS4ERR_BAD_SEQID) | |
1da177e4 | 869 | nfs4_drop_state_owner(sp); |
34dc1ad7 BH |
870 | if (!nfs4_has_session(server->nfs_client)) |
871 | nfs_increment_seqid(status, seqid); | |
cee54fc9 TM |
872 | } |
873 | ||
874 | /* | |
cee54fc9 TM |
875 | * Increment the seqid if the LOCK/LOCKU succeeded, or |
876 | * failed with a seqid incrementing error - | |
877 | * see comments nfs_fs.h:seqid_mutating_error() | |
878 | */ | |
879 | void nfs_increment_lock_seqid(int status, struct nfs_seqid *seqid) | |
880 | { | |
88d90939 | 881 | nfs_increment_seqid(status, seqid); |
cee54fc9 TM |
882 | } |
883 | ||
884 | int nfs_wait_on_sequence(struct nfs_seqid *seqid, struct rpc_task *task) | |
885 | { | |
886 | struct rpc_sequence *sequence = seqid->sequence->sequence; | |
887 | int status = 0; | |
888 | ||
889 | spin_lock(&sequence->lock); | |
2f74c0a0 TM |
890 | if (list_empty(&seqid->list)) |
891 | list_add_tail(&seqid->list, &sequence->list); | |
892 | if (list_first_entry(&sequence->list, struct nfs_seqid, list) == seqid) | |
893 | goto unlock; | |
5d00837b | 894 | rpc_sleep_on(&sequence->wait, task, NULL); |
2f74c0a0 TM |
895 | status = -EAGAIN; |
896 | unlock: | |
cee54fc9 TM |
897 | spin_unlock(&sequence->lock); |
898 | return status; | |
1da177e4 LT |
899 | } |
900 | ||
e005e804 | 901 | static int nfs4_run_state_manager(void *); |
1da177e4 | 902 | |
e005e804 | 903 | static void nfs4_clear_state_manager_bit(struct nfs_client *clp) |
433fbe4c TM |
904 | { |
905 | smp_mb__before_clear_bit(); | |
e005e804 | 906 | clear_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state); |
433fbe4c | 907 | smp_mb__after_clear_bit(); |
e005e804 | 908 | wake_up_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING); |
433fbe4c TM |
909 | rpc_wake_up(&clp->cl_rpcwaitq); |
910 | } | |
911 | ||
1da177e4 | 912 | /* |
e005e804 | 913 | * Schedule the nfs_client asynchronous state management routine |
1da177e4 | 914 | */ |
b0d3ded1 | 915 | void nfs4_schedule_state_manager(struct nfs_client *clp) |
1da177e4 | 916 | { |
5043e900 | 917 | struct task_struct *task; |
1da177e4 | 918 | |
e005e804 TM |
919 | if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) != 0) |
920 | return; | |
5043e900 TM |
921 | __module_get(THIS_MODULE); |
922 | atomic_inc(&clp->cl_count); | |
e005e804 | 923 | task = kthread_run(nfs4_run_state_manager, clp, "%s-manager", |
5d8515ca CL |
924 | rpc_peeraddr2str(clp->cl_rpcclient, |
925 | RPC_DISPLAY_ADDR)); | |
5043e900 TM |
926 | if (!IS_ERR(task)) |
927 | return; | |
e005e804 | 928 | nfs4_clear_state_manager_bit(clp); |
24c8dbbb | 929 | nfs_put_client(clp); |
5043e900 | 930 | module_put(THIS_MODULE); |
1da177e4 LT |
931 | } |
932 | ||
933 | /* | |
934 | * Schedule a state recovery attempt | |
935 | */ | |
adfa6f98 | 936 | void nfs4_schedule_state_recovery(struct nfs_client *clp) |
1da177e4 LT |
937 | { |
938 | if (!clp) | |
939 | return; | |
e598d843 TM |
940 | if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
941 | set_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); | |
e005e804 | 942 | nfs4_schedule_state_manager(clp); |
1da177e4 LT |
943 | } |
944 | ||
a2c0b9e2 | 945 | int nfs4_state_mark_reclaim_reboot(struct nfs_client *clp, struct nfs4_state *state) |
b79a4a1b TM |
946 | { |
947 | ||
948 | set_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); | |
949 | /* Don't recover state that expired before the reboot */ | |
950 | if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) { | |
951 | clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); | |
952 | return 0; | |
953 | } | |
7eff03ae | 954 | set_bit(NFS_OWNER_RECLAIM_REBOOT, &state->owner->so_flags); |
b79a4a1b TM |
955 | set_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state); |
956 | return 1; | |
957 | } | |
958 | ||
9e33bed5 | 959 | int nfs4_state_mark_reclaim_nograce(struct nfs_client *clp, struct nfs4_state *state) |
b79a4a1b TM |
960 | { |
961 | set_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags); | |
962 | clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); | |
7eff03ae | 963 | set_bit(NFS_OWNER_RECLAIM_NOGRACE, &state->owner->so_flags); |
b79a4a1b TM |
964 | set_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state); |
965 | return 1; | |
966 | } | |
967 | ||
02860014 | 968 | static int nfs4_reclaim_locks(struct nfs4_state *state, const struct nfs4_state_recovery_ops *ops) |
1da177e4 LT |
969 | { |
970 | struct inode *inode = state->inode; | |
19e03c57 | 971 | struct nfs_inode *nfsi = NFS_I(inode); |
1da177e4 LT |
972 | struct file_lock *fl; |
973 | int status = 0; | |
974 | ||
3f09df70 TM |
975 | if (inode->i_flock == NULL) |
976 | return 0; | |
977 | ||
978 | /* Guard against delegation returns and new lock/unlock calls */ | |
19e03c57 | 979 | down_write(&nfsi->rwsem); |
3f09df70 | 980 | /* Protect inode->i_flock using the BKL */ |
b89f4321 | 981 | lock_flocks(); |
90dc7d27 | 982 | for (fl = inode->i_flock; fl != NULL; fl = fl->fl_next) { |
43b2a33a | 983 | if (!(fl->fl_flags & (FL_POSIX|FL_FLOCK))) |
1da177e4 | 984 | continue; |
cd3758e3 | 985 | if (nfs_file_open_context(fl->fl_file)->state != state) |
1da177e4 | 986 | continue; |
b89f4321 | 987 | unlock_flocks(); |
1da177e4 | 988 | status = ops->recover_lock(state, fl); |
1da177e4 | 989 | switch (status) { |
965b5d67 TM |
990 | case 0: |
991 | break; | |
992 | case -ESTALE: | |
993 | case -NFS4ERR_ADMIN_REVOKED: | |
994 | case -NFS4ERR_STALE_STATEID: | |
995 | case -NFS4ERR_BAD_STATEID: | |
996 | case -NFS4ERR_EXPIRED: | |
997 | case -NFS4ERR_NO_GRACE: | |
998 | case -NFS4ERR_STALE_CLIENTID: | |
9c4c761a TM |
999 | case -NFS4ERR_BADSESSION: |
1000 | case -NFS4ERR_BADSLOT: | |
1001 | case -NFS4ERR_BAD_HIGH_SLOT: | |
1002 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
965b5d67 | 1003 | goto out; |
1da177e4 LT |
1004 | default: |
1005 | printk(KERN_ERR "%s: unhandled error %d. Zeroing state\n", | |
3110ff80 | 1006 | __func__, status); |
965b5d67 TM |
1007 | case -ENOMEM: |
1008 | case -NFS4ERR_DENIED: | |
1da177e4 LT |
1009 | case -NFS4ERR_RECLAIM_BAD: |
1010 | case -NFS4ERR_RECLAIM_CONFLICT: | |
43b2a33a | 1011 | /* kill_proc(fl->fl_pid, SIGLOST, 1); */ |
965b5d67 | 1012 | status = 0; |
1da177e4 | 1013 | } |
b89f4321 | 1014 | lock_flocks(); |
1da177e4 | 1015 | } |
b89f4321 | 1016 | unlock_flocks(); |
965b5d67 | 1017 | out: |
19e03c57 | 1018 | up_write(&nfsi->rwsem); |
1da177e4 LT |
1019 | return status; |
1020 | } | |
1021 | ||
02860014 | 1022 | static int nfs4_reclaim_open_state(struct nfs4_state_owner *sp, const struct nfs4_state_recovery_ops *ops) |
1da177e4 LT |
1023 | { |
1024 | struct nfs4_state *state; | |
1025 | struct nfs4_lock_state *lock; | |
1026 | int status = 0; | |
1027 | ||
1028 | /* Note: we rely on the sp->so_states list being ordered | |
1029 | * so that we always reclaim open(O_RDWR) and/or open(O_WRITE) | |
1030 | * states first. | |
1031 | * This is needed to ensure that the server won't give us any | |
1032 | * read delegations that we have to return if, say, we are | |
1033 | * recovering after a network partition or a reboot from a | |
1034 | * server that doesn't support a grace period. | |
1035 | */ | |
fe1d8195 TM |
1036 | restart: |
1037 | spin_lock(&sp->so_lock); | |
1da177e4 | 1038 | list_for_each_entry(state, &sp->so_states, open_states) { |
b79a4a1b TM |
1039 | if (!test_and_clear_bit(ops->state_flag_bit, &state->flags)) |
1040 | continue; | |
1da177e4 LT |
1041 | if (state->state == 0) |
1042 | continue; | |
fe1d8195 TM |
1043 | atomic_inc(&state->count); |
1044 | spin_unlock(&sp->so_lock); | |
1da177e4 | 1045 | status = ops->recover_open(sp, state); |
1da177e4 | 1046 | if (status >= 0) { |
02860014 TM |
1047 | status = nfs4_reclaim_locks(state, ops); |
1048 | if (status >= 0) { | |
1049 | list_for_each_entry(lock, &state->lock_states, ls_locks) { | |
1050 | if (!(lock->ls_flags & NFS_LOCK_INITIALIZED)) | |
1051 | printk("%s: Lock reclaim failed!\n", | |
3110ff80 | 1052 | __func__); |
02860014 | 1053 | } |
fe1d8195 TM |
1054 | nfs4_put_open_state(state); |
1055 | goto restart; | |
1da177e4 | 1056 | } |
1da177e4 LT |
1057 | } |
1058 | switch (status) { | |
1059 | default: | |
1060 | printk(KERN_ERR "%s: unhandled error %d. Zeroing state\n", | |
3110ff80 | 1061 | __func__, status); |
1da177e4 | 1062 | case -ENOENT: |
965b5d67 | 1063 | case -ENOMEM: |
b79a4a1b | 1064 | case -ESTALE: |
1da177e4 LT |
1065 | /* |
1066 | * Open state on this file cannot be recovered | |
1067 | * All we can do is revert to using the zero stateid. | |
1068 | */ | |
1069 | memset(state->stateid.data, 0, | |
1070 | sizeof(state->stateid.data)); | |
1071 | /* Mark the file as being 'closed' */ | |
1072 | state->state = 0; | |
1073 | break; | |
168667c4 TM |
1074 | case -EKEYEXPIRED: |
1075 | /* | |
1076 | * User RPCSEC_GSS context has expired. | |
1077 | * We cannot recover this stateid now, so | |
1078 | * skip it and allow recovery thread to | |
1079 | * proceed. | |
1080 | */ | |
1081 | break; | |
965b5d67 TM |
1082 | case -NFS4ERR_ADMIN_REVOKED: |
1083 | case -NFS4ERR_STALE_STATEID: | |
1084 | case -NFS4ERR_BAD_STATEID: | |
b79a4a1b TM |
1085 | case -NFS4ERR_RECLAIM_BAD: |
1086 | case -NFS4ERR_RECLAIM_CONFLICT: | |
1f0e890d | 1087 | nfs4_state_mark_reclaim_nograce(sp->so_server->nfs_client, state); |
b79a4a1b | 1088 | break; |
1da177e4 LT |
1089 | case -NFS4ERR_EXPIRED: |
1090 | case -NFS4ERR_NO_GRACE: | |
1f0e890d | 1091 | nfs4_state_mark_reclaim_nograce(sp->so_server->nfs_client, state); |
1da177e4 | 1092 | case -NFS4ERR_STALE_CLIENTID: |
9c4c761a TM |
1093 | case -NFS4ERR_BADSESSION: |
1094 | case -NFS4ERR_BADSLOT: | |
1095 | case -NFS4ERR_BAD_HIGH_SLOT: | |
1096 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
1da177e4 LT |
1097 | goto out_err; |
1098 | } | |
fe1d8195 TM |
1099 | nfs4_put_open_state(state); |
1100 | goto restart; | |
1da177e4 | 1101 | } |
fe1d8195 | 1102 | spin_unlock(&sp->so_lock); |
1da177e4 LT |
1103 | return 0; |
1104 | out_err: | |
fe1d8195 | 1105 | nfs4_put_open_state(state); |
1da177e4 LT |
1106 | return status; |
1107 | } | |
1108 | ||
b79a4a1b TM |
1109 | static void nfs4_clear_open_state(struct nfs4_state *state) |
1110 | { | |
1111 | struct nfs4_lock_state *lock; | |
1112 | ||
1113 | clear_bit(NFS_DELEGATED_STATE, &state->flags); | |
1114 | clear_bit(NFS_O_RDONLY_STATE, &state->flags); | |
1115 | clear_bit(NFS_O_WRONLY_STATE, &state->flags); | |
1116 | clear_bit(NFS_O_RDWR_STATE, &state->flags); | |
1117 | list_for_each_entry(lock, &state->lock_states, ls_locks) { | |
b79a4a1b TM |
1118 | lock->ls_seqid.flags = 0; |
1119 | lock->ls_flags &= ~NFS_LOCK_INITIALIZED; | |
1120 | } | |
1121 | } | |
1122 | ||
1123 | static void nfs4_state_mark_reclaim_helper(struct nfs_client *clp, int (*mark_reclaim)(struct nfs_client *clp, struct nfs4_state *state)) | |
cee54fc9 TM |
1124 | { |
1125 | struct nfs4_state_owner *sp; | |
9f958ab8 | 1126 | struct rb_node *pos; |
cee54fc9 | 1127 | struct nfs4_state *state; |
cee54fc9 TM |
1128 | |
1129 | /* Reset all sequence ids to zero */ | |
9f958ab8 TM |
1130 | for (pos = rb_first(&clp->cl_state_owners); pos != NULL; pos = rb_next(pos)) { |
1131 | sp = rb_entry(pos, struct nfs4_state_owner, so_client_node); | |
cee54fc9 | 1132 | sp->so_seqid.flags = 0; |
ec073428 | 1133 | spin_lock(&sp->so_lock); |
cee54fc9 | 1134 | list_for_each_entry(state, &sp->so_states, open_states) { |
b79a4a1b TM |
1135 | if (mark_reclaim(clp, state)) |
1136 | nfs4_clear_open_state(state); | |
cee54fc9 | 1137 | } |
ec073428 | 1138 | spin_unlock(&sp->so_lock); |
cee54fc9 TM |
1139 | } |
1140 | } | |
1141 | ||
b79a4a1b TM |
1142 | static void nfs4_state_start_reclaim_reboot(struct nfs_client *clp) |
1143 | { | |
1144 | /* Mark all delegations for reclaim */ | |
1145 | nfs_delegation_mark_reclaim(clp); | |
1146 | nfs4_state_mark_reclaim_helper(clp, nfs4_state_mark_reclaim_reboot); | |
1147 | } | |
1148 | ||
fce5c838 RL |
1149 | static void nfs4_reclaim_complete(struct nfs_client *clp, |
1150 | const struct nfs4_state_recovery_ops *ops) | |
1151 | { | |
1152 | /* Notify the server we're done reclaiming our state */ | |
1153 | if (ops->reclaim_complete) | |
1154 | (void)ops->reclaim_complete(clp); | |
1155 | } | |
1156 | ||
6eaa6149 | 1157 | static int nfs4_state_clear_reclaim_reboot(struct nfs_client *clp) |
b79a4a1b TM |
1158 | { |
1159 | struct nfs4_state_owner *sp; | |
1160 | struct rb_node *pos; | |
1161 | struct nfs4_state *state; | |
1162 | ||
1163 | if (!test_and_clear_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) | |
6eaa6149 | 1164 | return 0; |
7cab89b2 | 1165 | |
b79a4a1b TM |
1166 | for (pos = rb_first(&clp->cl_state_owners); pos != NULL; pos = rb_next(pos)) { |
1167 | sp = rb_entry(pos, struct nfs4_state_owner, so_client_node); | |
1168 | spin_lock(&sp->so_lock); | |
1169 | list_for_each_entry(state, &sp->so_states, open_states) { | |
1170 | if (!test_and_clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags)) | |
1171 | continue; | |
1172 | nfs4_state_mark_reclaim_nograce(clp, state); | |
1173 | } | |
1174 | spin_unlock(&sp->so_lock); | |
1175 | } | |
1176 | ||
1177 | nfs_delegation_reap_unclaimed(clp); | |
6eaa6149 TM |
1178 | return 1; |
1179 | } | |
1180 | ||
1181 | static void nfs4_state_end_reclaim_reboot(struct nfs_client *clp) | |
1182 | { | |
1183 | if (!nfs4_state_clear_reclaim_reboot(clp)) | |
1184 | return; | |
1185 | nfs4_reclaim_complete(clp, clp->cl_mvops->reboot_recovery_ops); | |
b79a4a1b TM |
1186 | } |
1187 | ||
1188 | static void nfs_delegation_clear_all(struct nfs_client *clp) | |
1189 | { | |
1190 | nfs_delegation_mark_reclaim(clp); | |
1191 | nfs_delegation_reap_unclaimed(clp); | |
1192 | } | |
1193 | ||
1194 | static void nfs4_state_start_reclaim_nograce(struct nfs_client *clp) | |
1195 | { | |
1196 | nfs_delegation_clear_all(clp); | |
1197 | nfs4_state_mark_reclaim_helper(clp, nfs4_state_mark_reclaim_nograce); | |
1198 | } | |
1199 | ||
168667c4 TM |
1200 | static void nfs4_warn_keyexpired(const char *s) |
1201 | { | |
1202 | printk_ratelimited(KERN_WARNING "Error: state manager" | |
1203 | " encountered RPCSEC_GSS session" | |
1204 | " expired against NFSv4 server %s.\n", | |
1205 | s); | |
1206 | } | |
1207 | ||
4f7cdf18 | 1208 | static int nfs4_recovery_handle_error(struct nfs_client *clp, int error) |
e598d843 TM |
1209 | { |
1210 | switch (error) { | |
1211 | case -NFS4ERR_CB_PATH_DOWN: | |
707fb4b3 | 1212 | nfs_handle_cb_pathdown(clp); |
4f7cdf18 | 1213 | return 0; |
c8b7ae3d TM |
1214 | case -NFS4ERR_NO_GRACE: |
1215 | nfs4_state_end_reclaim_reboot(clp); | |
1216 | return 0; | |
e598d843 TM |
1217 | case -NFS4ERR_STALE_CLIENTID: |
1218 | case -NFS4ERR_LEASE_MOVED: | |
1219 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
6eaa6149 | 1220 | nfs4_state_clear_reclaim_reboot(clp); |
e598d843 TM |
1221 | nfs4_state_start_reclaim_reboot(clp); |
1222 | break; | |
1223 | case -NFS4ERR_EXPIRED: | |
1224 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1225 | nfs4_state_start_reclaim_nograce(clp); | |
8ba9bf8e | 1226 | break; |
c3fad1b1 AA |
1227 | case -NFS4ERR_BADSESSION: |
1228 | case -NFS4ERR_BADSLOT: | |
1229 | case -NFS4ERR_BAD_HIGH_SLOT: | |
1230 | case -NFS4ERR_DEADSESSION: | |
1231 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
1232 | case -NFS4ERR_SEQ_FALSE_RETRY: | |
1233 | case -NFS4ERR_SEQ_MISORDERED: | |
6df08189 | 1234 | set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); |
0b9e2d41 AA |
1235 | /* Zero session reset errors */ |
1236 | return 0; | |
168667c4 TM |
1237 | case -EKEYEXPIRED: |
1238 | /* Nothing we can do */ | |
1239 | nfs4_warn_keyexpired(clp->cl_hostname); | |
1240 | return 0; | |
e598d843 | 1241 | } |
4f7cdf18 | 1242 | return error; |
e598d843 TM |
1243 | } |
1244 | ||
02860014 | 1245 | static int nfs4_do_reclaim(struct nfs_client *clp, const struct nfs4_state_recovery_ops *ops) |
1da177e4 | 1246 | { |
9f958ab8 | 1247 | struct rb_node *pos; |
1da177e4 LT |
1248 | int status = 0; |
1249 | ||
7eff03ae TM |
1250 | restart: |
1251 | spin_lock(&clp->cl_lock); | |
02860014 TM |
1252 | for (pos = rb_first(&clp->cl_state_owners); pos != NULL; pos = rb_next(pos)) { |
1253 | struct nfs4_state_owner *sp = rb_entry(pos, struct nfs4_state_owner, so_client_node); | |
7eff03ae TM |
1254 | if (!test_and_clear_bit(ops->owner_flag_bit, &sp->so_flags)) |
1255 | continue; | |
1256 | atomic_inc(&sp->so_count); | |
1257 | spin_unlock(&clp->cl_lock); | |
02860014 | 1258 | status = nfs4_reclaim_open_state(sp, ops); |
7eff03ae TM |
1259 | if (status < 0) { |
1260 | set_bit(ops->owner_flag_bit, &sp->so_flags); | |
1261 | nfs4_put_state_owner(sp); | |
4f7cdf18 | 1262 | return nfs4_recovery_handle_error(clp, status); |
7eff03ae TM |
1263 | } |
1264 | nfs4_put_state_owner(sp); | |
1265 | goto restart; | |
02860014 | 1266 | } |
7eff03ae | 1267 | spin_unlock(&clp->cl_lock); |
02860014 TM |
1268 | return status; |
1269 | } | |
1270 | ||
1271 | static int nfs4_check_lease(struct nfs_client *clp) | |
1272 | { | |
1273 | struct rpc_cred *cred; | |
c48f4f35 TM |
1274 | const struct nfs4_state_maintenance_ops *ops = |
1275 | clp->cl_mvops->state_renewal_ops; | |
02860014 | 1276 | int status = -NFS4ERR_EXPIRED; |
1da177e4 | 1277 | |
0f605b56 TM |
1278 | /* Is the client already known to have an expired lease? */ |
1279 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) | |
1280 | return 0; | |
a7b72103 AA |
1281 | spin_lock(&clp->cl_lock); |
1282 | cred = ops->get_state_renewal_cred_locked(clp); | |
1283 | spin_unlock(&clp->cl_lock); | |
0f605b56 TM |
1284 | if (cred == NULL) { |
1285 | cred = nfs4_get_setclientid_cred(clp); | |
1286 | if (cred == NULL) | |
1287 | goto out; | |
286d7d6a | 1288 | } |
8e69514f | 1289 | status = ops->renew_lease(clp, cred); |
0f605b56 TM |
1290 | put_rpccred(cred); |
1291 | out: | |
4f7cdf18 | 1292 | return nfs4_recovery_handle_error(clp, status); |
02860014 TM |
1293 | } |
1294 | ||
1295 | static int nfs4_reclaim_lease(struct nfs_client *clp) | |
1296 | { | |
1297 | struct rpc_cred *cred; | |
c48f4f35 TM |
1298 | const struct nfs4_state_recovery_ops *ops = |
1299 | clp->cl_mvops->reboot_recovery_ops; | |
02860014 TM |
1300 | int status = -ENOENT; |
1301 | ||
90a16617 | 1302 | cred = ops->get_clid_cred(clp); |
286d7d6a | 1303 | if (cred != NULL) { |
591d71cb | 1304 | status = ops->establish_clid(clp, cred); |
286d7d6a | 1305 | put_rpccred(cred); |
a2b2bb88 TM |
1306 | /* Handle case where the user hasn't set up machine creds */ |
1307 | if (status == -EACCES && cred == clp->cl_machine_cred) { | |
1308 | nfs4_clear_machine_cred(clp); | |
02860014 | 1309 | status = -EAGAIN; |
a2b2bb88 | 1310 | } |
c2e713dd BH |
1311 | if (status == -NFS4ERR_MINOR_VERS_MISMATCH) |
1312 | status = -EPROTONOSUPPORT; | |
286d7d6a | 1313 | } |
02860014 TM |
1314 | return status; |
1315 | } | |
1316 | ||
76db6d95 | 1317 | #ifdef CONFIG_NFS_V4_1 |
b9efa1b2 AA |
1318 | void nfs41_handle_recall_slot(struct nfs_client *clp) |
1319 | { | |
1320 | set_bit(NFS4CLNT_RECALL_SLOT, &clp->cl_state); | |
1321 | nfs4_schedule_state_recovery(clp); | |
1322 | } | |
1323 | ||
0f79fd6f TM |
1324 | static void nfs4_reset_all_state(struct nfs_client *clp) |
1325 | { | |
1326 | if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) == 0) { | |
1327 | clp->cl_boot_time = CURRENT_TIME; | |
1328 | nfs4_state_start_reclaim_nograce(clp); | |
1329 | nfs4_schedule_state_recovery(clp); | |
1330 | } | |
1331 | } | |
1332 | ||
1333 | static void nfs41_handle_server_reboot(struct nfs_client *clp) | |
1334 | { | |
1335 | if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) == 0) { | |
1336 | nfs4_state_start_reclaim_reboot(clp); | |
1337 | nfs4_schedule_state_recovery(clp); | |
1338 | } | |
1339 | } | |
1340 | ||
1341 | static void nfs41_handle_state_revoked(struct nfs_client *clp) | |
1342 | { | |
1343 | /* Temporary */ | |
1344 | nfs4_reset_all_state(clp); | |
1345 | } | |
1346 | ||
1347 | static void nfs41_handle_recallable_state_revoked(struct nfs_client *clp) | |
1348 | { | |
1349 | /* This will need to handle layouts too */ | |
1350 | nfs_expire_all_delegations(clp); | |
1351 | } | |
1352 | ||
1353 | static void nfs41_handle_cb_path_down(struct nfs_client *clp) | |
1354 | { | |
1355 | nfs_expire_all_delegations(clp); | |
1356 | if (test_and_set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state) == 0) | |
1357 | nfs4_schedule_state_recovery(clp); | |
1358 | } | |
1359 | ||
0629e370 AB |
1360 | void nfs41_handle_sequence_flag_errors(struct nfs_client *clp, u32 flags) |
1361 | { | |
1362 | if (!flags) | |
1363 | return; | |
0f79fd6f TM |
1364 | else if (flags & SEQ4_STATUS_RESTART_RECLAIM_NEEDED) |
1365 | nfs41_handle_server_reboot(clp); | |
1366 | else if (flags & (SEQ4_STATUS_EXPIRED_ALL_STATE_REVOKED | | |
0629e370 AB |
1367 | SEQ4_STATUS_EXPIRED_SOME_STATE_REVOKED | |
1368 | SEQ4_STATUS_ADMIN_STATE_REVOKED | | |
0f79fd6f TM |
1369 | SEQ4_STATUS_LEASE_MOVED)) |
1370 | nfs41_handle_state_revoked(clp); | |
1371 | else if (flags & SEQ4_STATUS_RECALLABLE_STATE_REVOKED) | |
1372 | nfs41_handle_recallable_state_revoked(clp); | |
1373 | else if (flags & (SEQ4_STATUS_CB_PATH_DOWN | | |
0629e370 AB |
1374 | SEQ4_STATUS_BACKCHANNEL_FAULT | |
1375 | SEQ4_STATUS_CB_PATH_DOWN_SESSION)) | |
0f79fd6f | 1376 | nfs41_handle_cb_path_down(clp); |
0629e370 AB |
1377 | } |
1378 | ||
c3fad1b1 AA |
1379 | static int nfs4_reset_session(struct nfs_client *clp) |
1380 | { | |
1381 | int status; | |
1382 | ||
38045412 | 1383 | nfs4_begin_drain_session(clp); |
c3fad1b1 AA |
1384 | status = nfs4_proc_destroy_session(clp->cl_session); |
1385 | if (status && status != -NFS4ERR_BADSESSION && | |
1386 | status != -NFS4ERR_DEADSESSION) { | |
f455848a | 1387 | status = nfs4_recovery_handle_error(clp, status); |
c3fad1b1 AA |
1388 | goto out; |
1389 | } | |
1390 | ||
1391 | memset(clp->cl_session->sess_id.data, 0, NFS4_MAX_SESSIONID_LEN); | |
f26468fb | 1392 | status = nfs4_proc_create_session(clp); |
41f54a55 | 1393 | if (status) { |
f455848a | 1394 | status = nfs4_recovery_handle_error(clp, status); |
41f54a55 AA |
1395 | goto out; |
1396 | } | |
1397 | /* create_session negotiated new slot table */ | |
1398 | clear_bit(NFS4CLNT_RECALL_SLOT, &clp->cl_state); | |
9dfdf404 | 1399 | |
41f54a55 AA |
1400 | /* Let the state manager reestablish state */ |
1401 | if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) | |
5601a00d | 1402 | nfs41_setup_state_renewal(clp); |
41f54a55 | 1403 | out: |
c3fad1b1 AA |
1404 | return status; |
1405 | } | |
76db6d95 | 1406 | |
b9efa1b2 AA |
1407 | static int nfs4_recall_slot(struct nfs_client *clp) |
1408 | { | |
1409 | struct nfs4_slot_table *fc_tbl = &clp->cl_session->fc_slot_table; | |
1410 | struct nfs4_channel_attrs *fc_attrs = &clp->cl_session->fc_attrs; | |
1411 | struct nfs4_slot *new, *old; | |
1412 | int i; | |
1413 | ||
1414 | nfs4_begin_drain_session(clp); | |
1415 | new = kmalloc(fc_tbl->target_max_slots * sizeof(struct nfs4_slot), | |
8535b2be | 1416 | GFP_NOFS); |
b9efa1b2 AA |
1417 | if (!new) |
1418 | return -ENOMEM; | |
1419 | ||
1420 | spin_lock(&fc_tbl->slot_tbl_lock); | |
1421 | for (i = 0; i < fc_tbl->target_max_slots; i++) | |
1422 | new[i].seq_nr = fc_tbl->slots[i].seq_nr; | |
1423 | old = fc_tbl->slots; | |
1424 | fc_tbl->slots = new; | |
1425 | fc_tbl->max_slots = fc_tbl->target_max_slots; | |
1426 | fc_tbl->target_max_slots = 0; | |
1427 | fc_attrs->max_reqs = fc_tbl->max_slots; | |
1428 | spin_unlock(&fc_tbl->slot_tbl_lock); | |
1429 | ||
1430 | kfree(old); | |
1431 | nfs4_end_drain_session(clp); | |
1432 | return 0; | |
1433 | } | |
1434 | ||
76db6d95 | 1435 | #else /* CONFIG_NFS_V4_1 */ |
c3fad1b1 | 1436 | static int nfs4_reset_session(struct nfs_client *clp) { return 0; } |
5601a00d | 1437 | static int nfs4_end_drain_session(struct nfs_client *clp) { return 0; } |
b9efa1b2 | 1438 | static int nfs4_recall_slot(struct nfs_client *clp) { return 0; } |
76db6d95 AA |
1439 | #endif /* CONFIG_NFS_V4_1 */ |
1440 | ||
78722e9c AA |
1441 | /* Set NFS4CLNT_LEASE_EXPIRED for all v4.0 errors and for recoverable errors |
1442 | * on EXCHANGE_ID for v4.1 | |
1443 | */ | |
1444 | static void nfs4_set_lease_expired(struct nfs_client *clp, int status) | |
1445 | { | |
1446 | if (nfs4_has_session(clp)) { | |
1447 | switch (status) { | |
1448 | case -NFS4ERR_DELAY: | |
1449 | case -NFS4ERR_CLID_INUSE: | |
1450 | case -EAGAIN: | |
1451 | break; | |
1452 | ||
168667c4 TM |
1453 | case -EKEYEXPIRED: |
1454 | nfs4_warn_keyexpired(clp->cl_hostname); | |
78722e9c AA |
1455 | case -NFS4ERR_NOT_SAME: /* FixMe: implement recovery |
1456 | * in nfs4_exchange_id */ | |
1457 | default: | |
1458 | return; | |
1459 | } | |
1460 | } | |
1461 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1462 | } | |
1463 | ||
e005e804 | 1464 | static void nfs4_state_manager(struct nfs_client *clp) |
02860014 | 1465 | { |
02860014 TM |
1466 | int status = 0; |
1467 | ||
02860014 | 1468 | /* Ensure exclusive access to NFSv4 state */ |
f3c76491 | 1469 | for(;;) { |
b79a4a1b TM |
1470 | if (test_and_clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) { |
1471 | /* We're going to have to re-establish a clientid */ | |
1472 | status = nfs4_reclaim_lease(clp); | |
1473 | if (status) { | |
78722e9c | 1474 | nfs4_set_lease_expired(clp, status); |
b6d408ba TM |
1475 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, |
1476 | &clp->cl_state)) | |
b79a4a1b | 1477 | continue; |
76db6d95 AA |
1478 | if (clp->cl_cons_state == |
1479 | NFS_CS_SESSION_INITING) | |
1480 | nfs_mark_client_ready(clp, status); | |
b79a4a1b TM |
1481 | goto out_error; |
1482 | } | |
e598d843 | 1483 | clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); |
7cab89b2 | 1484 | set_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state); |
974cec8c | 1485 | pnfs_destroy_all_layouts(clp); |
e598d843 TM |
1486 | } |
1487 | ||
1488 | if (test_and_clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state)) { | |
1489 | status = nfs4_check_lease(clp); | |
b6d408ba | 1490 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
e598d843 | 1491 | continue; |
b6d408ba TM |
1492 | if (status < 0 && status != -NFS4ERR_CB_PATH_DOWN) |
1493 | goto out_error; | |
b79a4a1b | 1494 | } |
b6d408ba | 1495 | |
c3fad1b1 | 1496 | /* Initialize or reset the session */ |
6df08189 | 1497 | if (test_and_clear_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state) |
7111dc73 | 1498 | && nfs4_has_session(clp)) { |
4d643d1d | 1499 | status = nfs4_reset_session(clp); |
b6d408ba TM |
1500 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
1501 | continue; | |
1502 | if (status < 0) | |
76db6d95 | 1503 | goto out_error; |
76db6d95 | 1504 | } |
b6d408ba | 1505 | |
b79a4a1b | 1506 | /* First recover reboot state... */ |
e345e88a | 1507 | if (test_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) { |
591d71cb | 1508 | status = nfs4_do_reclaim(clp, |
c48f4f35 | 1509 | clp->cl_mvops->reboot_recovery_ops); |
b6d408ba | 1510 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) || |
6df08189 | 1511 | test_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state)) |
c3fad1b1 | 1512 | continue; |
b79a4a1b | 1513 | nfs4_state_end_reclaim_reboot(clp); |
b6d408ba TM |
1514 | if (test_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) |
1515 | continue; | |
1516 | if (status < 0) | |
1517 | goto out_error; | |
02860014 TM |
1518 | } |
1519 | ||
b79a4a1b TM |
1520 | /* Now recover expired state... */ |
1521 | if (test_and_clear_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) { | |
591d71cb | 1522 | status = nfs4_do_reclaim(clp, |
c48f4f35 | 1523 | clp->cl_mvops->nograce_recovery_ops); |
b6d408ba | 1524 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) || |
6df08189 | 1525 | test_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state) || |
b6d408ba TM |
1526 | test_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) |
1527 | continue; | |
1528 | if (status < 0) | |
b79a4a1b | 1529 | goto out_error; |
1da177e4 | 1530 | } |
707fb4b3 | 1531 | |
5601a00d | 1532 | nfs4_end_drain_session(clp); |
707fb4b3 TM |
1533 | if (test_and_clear_bit(NFS4CLNT_DELEGRETURN, &clp->cl_state)) { |
1534 | nfs_client_return_marked_delegations(clp); | |
1535 | continue; | |
1536 | } | |
b9efa1b2 AA |
1537 | /* Recall session slots */ |
1538 | if (test_and_clear_bit(NFS4CLNT_RECALL_SLOT, &clp->cl_state) | |
1539 | && nfs4_has_session(clp)) { | |
1540 | status = nfs4_recall_slot(clp); | |
1541 | if (status < 0) | |
1542 | goto out_error; | |
1543 | continue; | |
1544 | } | |
1545 | ||
e005e804 TM |
1546 | |
1547 | nfs4_clear_state_manager_bit(clp); | |
f3c76491 TM |
1548 | /* Did we race with an attempt to give us more work? */ |
1549 | if (clp->cl_state == 0) | |
1550 | break; | |
1551 | if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) != 0) | |
1552 | break; | |
1da177e4 | 1553 | } |
e005e804 | 1554 | return; |
1da177e4 | 1555 | out_error: |
e005e804 | 1556 | printk(KERN_WARNING "Error: state manager failed on NFSv4 server %s" |
5d8515ca | 1557 | " with error %d\n", clp->cl_hostname, -status); |
5601a00d | 1558 | nfs4_end_drain_session(clp); |
e005e804 TM |
1559 | nfs4_clear_state_manager_bit(clp); |
1560 | } | |
1561 | ||
1562 | static int nfs4_run_state_manager(void *ptr) | |
1563 | { | |
1564 | struct nfs_client *clp = ptr; | |
1565 | ||
1566 | allow_signal(SIGKILL); | |
1567 | nfs4_state_manager(clp); | |
1568 | nfs_put_client(clp); | |
1569 | module_put_and_exit(0); | |
1570 | return 0; | |
1da177e4 LT |
1571 | } |
1572 | ||
1573 | /* | |
1574 | * Local variables: | |
1575 | * c-basic-offset: 8 | |
1576 | * End: | |
1577 | */ |