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