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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 | ||
42acd021 AA |
145 | /* |
146 | * Back channel returns NFS4ERR_DELAY for new requests when | |
147 | * NFS4_SESSION_DRAINING is set so there is no work to be done when draining | |
148 | * is ended. | |
149 | */ | |
5601a00d | 150 | static void nfs4_end_drain_session(struct nfs_client *clp) |
9dfdf404 | 151 | { |
5601a00d | 152 | struct nfs4_session *ses = clp->cl_session; |
689cf5c1 AB |
153 | int max_slots; |
154 | ||
a2118c33 TM |
155 | if (ses == NULL) |
156 | return; | |
157 | if (test_and_clear_bit(NFS4_SESSION_DRAINING, &ses->session_state)) { | |
689cf5c1 AB |
158 | spin_lock(&ses->fc_slot_table.slot_tbl_lock); |
159 | max_slots = ses->fc_slot_table.max_slots; | |
160 | while (max_slots--) { | |
161 | struct rpc_task *task; | |
162 | ||
163 | task = rpc_wake_up_next(&ses->fc_slot_table. | |
164 | slot_tbl_waitq); | |
165 | if (!task) | |
166 | break; | |
167 | rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED); | |
168 | } | |
169 | spin_unlock(&ses->fc_slot_table.slot_tbl_lock); | |
170 | } | |
9dfdf404 RL |
171 | } |
172 | ||
42acd021 | 173 | static int nfs4_wait_on_slot_tbl(struct nfs4_slot_table *tbl) |
9dfdf404 | 174 | { |
9dfdf404 | 175 | spin_lock(&tbl->slot_tbl_lock); |
9dfdf404 | 176 | if (tbl->highest_used_slotid != -1) { |
42acd021 | 177 | INIT_COMPLETION(tbl->complete); |
9dfdf404 | 178 | spin_unlock(&tbl->slot_tbl_lock); |
42acd021 | 179 | return wait_for_completion_interruptible(&tbl->complete); |
9dfdf404 RL |
180 | } |
181 | spin_unlock(&tbl->slot_tbl_lock); | |
182 | return 0; | |
183 | } | |
184 | ||
42acd021 AA |
185 | static int nfs4_begin_drain_session(struct nfs_client *clp) |
186 | { | |
187 | struct nfs4_session *ses = clp->cl_session; | |
188 | int ret = 0; | |
189 | ||
190 | set_bit(NFS4_SESSION_DRAINING, &ses->session_state); | |
191 | /* back channel */ | |
192 | ret = nfs4_wait_on_slot_tbl(&ses->bc_slot_table); | |
193 | if (ret) | |
194 | return ret; | |
195 | /* fore channel */ | |
196 | return nfs4_wait_on_slot_tbl(&ses->fc_slot_table); | |
197 | } | |
198 | ||
4d643d1d AA |
199 | int nfs41_init_clientid(struct nfs_client *clp, struct rpc_cred *cred) |
200 | { | |
201 | int status; | |
202 | ||
38045412 | 203 | nfs4_begin_drain_session(clp); |
4d643d1d | 204 | status = nfs4_proc_exchange_id(clp, cred); |
9430fb6b RL |
205 | if (status != 0) |
206 | goto out; | |
207 | status = nfs4_proc_create_session(clp); | |
208 | if (status != 0) | |
209 | goto out; | |
2c2618c6 AA |
210 | status = nfs4_set_callback_sessionid(clp); |
211 | if (status != 0) { | |
212 | printk(KERN_WARNING "Sessionid not set. No callback service\n"); | |
213 | nfs_callback_down(1); | |
214 | status = 0; | |
215 | } | |
9430fb6b RL |
216 | nfs41_setup_state_renewal(clp); |
217 | nfs_mark_client_ready(clp, NFS_CS_READY); | |
218 | out: | |
4d643d1d AA |
219 | return status; |
220 | } | |
221 | ||
b4b82607 AA |
222 | struct rpc_cred *nfs4_get_exchange_id_cred(struct nfs_client *clp) |
223 | { | |
224 | struct rpc_cred *cred; | |
225 | ||
226 | spin_lock(&clp->cl_lock); | |
227 | cred = nfs4_get_machine_cred_locked(clp); | |
228 | spin_unlock(&clp->cl_lock); | |
229 | return cred; | |
230 | } | |
231 | ||
232 | #endif /* CONFIG_NFS_V4_1 */ | |
233 | ||
a7b72103 | 234 | struct rpc_cred *nfs4_get_setclientid_cred(struct nfs_client *clp) |
286d7d6a TM |
235 | { |
236 | struct nfs4_state_owner *sp; | |
9f958ab8 | 237 | struct rb_node *pos; |
a2b2bb88 | 238 | struct rpc_cred *cred; |
286d7d6a | 239 | |
6dc9d57a TM |
240 | spin_lock(&clp->cl_lock); |
241 | cred = nfs4_get_machine_cred_locked(clp); | |
a2b2bb88 TM |
242 | if (cred != NULL) |
243 | goto out; | |
9f958ab8 TM |
244 | pos = rb_first(&clp->cl_state_owners); |
245 | if (pos != NULL) { | |
246 | sp = rb_entry(pos, struct nfs4_state_owner, so_client_node); | |
a2b2bb88 | 247 | cred = get_rpccred(sp->so_cred); |
286d7d6a | 248 | } |
a2b2bb88 | 249 | out: |
6dc9d57a | 250 | spin_unlock(&clp->cl_lock); |
a2b2bb88 | 251 | return cred; |
286d7d6a TM |
252 | } |
253 | ||
9f958ab8 TM |
254 | static void nfs_alloc_unique_id(struct rb_root *root, struct nfs_unique_id *new, |
255 | __u64 minval, int maxbits) | |
256 | { | |
257 | struct rb_node **p, *parent; | |
258 | struct nfs_unique_id *pos; | |
259 | __u64 mask = ~0ULL; | |
260 | ||
261 | if (maxbits < 64) | |
262 | mask = (1ULL << maxbits) - 1ULL; | |
263 | ||
264 | /* Ensure distribution is more or less flat */ | |
265 | get_random_bytes(&new->id, sizeof(new->id)); | |
266 | new->id &= mask; | |
267 | if (new->id < minval) | |
268 | new->id += minval; | |
269 | retry: | |
270 | p = &root->rb_node; | |
271 | parent = NULL; | |
272 | ||
273 | while (*p != NULL) { | |
274 | parent = *p; | |
275 | pos = rb_entry(parent, struct nfs_unique_id, rb_node); | |
276 | ||
277 | if (new->id < pos->id) | |
278 | p = &(*p)->rb_left; | |
279 | else if (new->id > pos->id) | |
280 | p = &(*p)->rb_right; | |
281 | else | |
282 | goto id_exists; | |
283 | } | |
284 | rb_link_node(&new->rb_node, parent, p); | |
285 | rb_insert_color(&new->rb_node, root); | |
286 | return; | |
287 | id_exists: | |
288 | for (;;) { | |
289 | new->id++; | |
290 | if (new->id < minval || (new->id & mask) != new->id) { | |
291 | new->id = minval; | |
292 | break; | |
293 | } | |
294 | parent = rb_next(parent); | |
295 | if (parent == NULL) | |
296 | break; | |
297 | pos = rb_entry(parent, struct nfs_unique_id, rb_node); | |
298 | if (new->id < pos->id) | |
299 | break; | |
300 | } | |
301 | goto retry; | |
302 | } | |
303 | ||
304 | static void nfs_free_unique_id(struct rb_root *root, struct nfs_unique_id *id) | |
305 | { | |
306 | rb_erase(&id->rb_node, root); | |
307 | } | |
308 | ||
1da177e4 | 309 | static struct nfs4_state_owner * |
6f2e64d3 | 310 | nfs4_find_state_owner(struct nfs_server *server, struct rpc_cred *cred) |
1da177e4 | 311 | { |
6f2e64d3 | 312 | struct nfs_client *clp = server->nfs_client; |
9f958ab8 TM |
313 | struct rb_node **p = &clp->cl_state_owners.rb_node, |
314 | *parent = NULL; | |
1da177e4 LT |
315 | struct nfs4_state_owner *sp, *res = NULL; |
316 | ||
9f958ab8 TM |
317 | while (*p != NULL) { |
318 | parent = *p; | |
319 | sp = rb_entry(parent, struct nfs4_state_owner, so_client_node); | |
320 | ||
6f2e64d3 TM |
321 | if (server < sp->so_server) { |
322 | p = &parent->rb_left; | |
323 | continue; | |
324 | } | |
325 | if (server > sp->so_server) { | |
326 | p = &parent->rb_right; | |
327 | continue; | |
328 | } | |
9f958ab8 TM |
329 | if (cred < sp->so_cred) |
330 | p = &parent->rb_left; | |
331 | else if (cred > sp->so_cred) | |
332 | p = &parent->rb_right; | |
333 | else { | |
334 | atomic_inc(&sp->so_count); | |
335 | res = sp; | |
336 | break; | |
337 | } | |
1da177e4 LT |
338 | } |
339 | return res; | |
340 | } | |
341 | ||
9f958ab8 TM |
342 | static struct nfs4_state_owner * |
343 | nfs4_insert_state_owner(struct nfs_client *clp, struct nfs4_state_owner *new) | |
344 | { | |
345 | struct rb_node **p = &clp->cl_state_owners.rb_node, | |
346 | *parent = NULL; | |
347 | struct nfs4_state_owner *sp; | |
348 | ||
349 | while (*p != NULL) { | |
350 | parent = *p; | |
351 | sp = rb_entry(parent, struct nfs4_state_owner, so_client_node); | |
352 | ||
6f2e64d3 TM |
353 | if (new->so_server < sp->so_server) { |
354 | p = &parent->rb_left; | |
355 | continue; | |
356 | } | |
357 | if (new->so_server > sp->so_server) { | |
358 | p = &parent->rb_right; | |
359 | continue; | |
360 | } | |
9f958ab8 TM |
361 | if (new->so_cred < sp->so_cred) |
362 | p = &parent->rb_left; | |
363 | else if (new->so_cred > sp->so_cred) | |
364 | p = &parent->rb_right; | |
365 | else { | |
366 | atomic_inc(&sp->so_count); | |
367 | return sp; | |
368 | } | |
369 | } | |
370 | nfs_alloc_unique_id(&clp->cl_openowner_id, &new->so_owner_id, 1, 64); | |
371 | rb_link_node(&new->so_client_node, parent, p); | |
372 | rb_insert_color(&new->so_client_node, &clp->cl_state_owners); | |
373 | return new; | |
374 | } | |
375 | ||
376 | static void | |
377 | nfs4_remove_state_owner(struct nfs_client *clp, struct nfs4_state_owner *sp) | |
378 | { | |
379 | if (!RB_EMPTY_NODE(&sp->so_client_node)) | |
380 | rb_erase(&sp->so_client_node, &clp->cl_state_owners); | |
381 | nfs_free_unique_id(&clp->cl_openowner_id, &sp->so_owner_id); | |
382 | } | |
383 | ||
1da177e4 LT |
384 | /* |
385 | * nfs4_alloc_state_owner(): this is called on the OPEN or CREATE path to | |
386 | * create a new state_owner. | |
387 | * | |
388 | */ | |
389 | static struct nfs4_state_owner * | |
390 | nfs4_alloc_state_owner(void) | |
391 | { | |
392 | struct nfs4_state_owner *sp; | |
393 | ||
8535b2be | 394 | sp = kzalloc(sizeof(*sp),GFP_NOFS); |
1da177e4 LT |
395 | if (!sp) |
396 | return NULL; | |
ec073428 | 397 | spin_lock_init(&sp->so_lock); |
1da177e4 | 398 | INIT_LIST_HEAD(&sp->so_states); |
cee54fc9 TM |
399 | rpc_init_wait_queue(&sp->so_sequence.wait, "Seqid_waitqueue"); |
400 | sp->so_seqid.sequence = &sp->so_sequence; | |
401 | spin_lock_init(&sp->so_sequence.lock); | |
402 | INIT_LIST_HEAD(&sp->so_sequence.list); | |
1da177e4 LT |
403 | atomic_set(&sp->so_count, 1); |
404 | return sp; | |
405 | } | |
406 | ||
1d2e88e7 | 407 | static void |
1da177e4 LT |
408 | nfs4_drop_state_owner(struct nfs4_state_owner *sp) |
409 | { | |
9f958ab8 | 410 | if (!RB_EMPTY_NODE(&sp->so_client_node)) { |
1f0e890d | 411 | struct nfs_client *clp = sp->so_server->nfs_client; |
9f958ab8 TM |
412 | |
413 | spin_lock(&clp->cl_lock); | |
414 | rb_erase(&sp->so_client_node, &clp->cl_state_owners); | |
415 | RB_CLEAR_NODE(&sp->so_client_node); | |
416 | spin_unlock(&clp->cl_lock); | |
417 | } | |
1da177e4 LT |
418 | } |
419 | ||
1da177e4 LT |
420 | struct nfs4_state_owner *nfs4_get_state_owner(struct nfs_server *server, struct rpc_cred *cred) |
421 | { | |
7539bbab | 422 | struct nfs_client *clp = server->nfs_client; |
1da177e4 LT |
423 | struct nfs4_state_owner *sp, *new; |
424 | ||
1da177e4 | 425 | spin_lock(&clp->cl_lock); |
6f2e64d3 | 426 | sp = nfs4_find_state_owner(server, cred); |
1da177e4 | 427 | spin_unlock(&clp->cl_lock); |
1da177e4 LT |
428 | if (sp != NULL) |
429 | return sp; | |
9f958ab8 TM |
430 | new = nfs4_alloc_state_owner(); |
431 | if (new == NULL) | |
432 | return NULL; | |
6f2e64d3 | 433 | new->so_server = server; |
9f958ab8 TM |
434 | new->so_cred = cred; |
435 | spin_lock(&clp->cl_lock); | |
436 | sp = nfs4_insert_state_owner(clp, new); | |
437 | spin_unlock(&clp->cl_lock); | |
438 | if (sp == new) | |
439 | get_rpccred(cred); | |
f6a1cc89 TM |
440 | else { |
441 | rpc_destroy_wait_queue(&new->so_sequence.wait); | |
9f958ab8 | 442 | kfree(new); |
f6a1cc89 | 443 | } |
9f958ab8 | 444 | return sp; |
1da177e4 LT |
445 | } |
446 | ||
1da177e4 LT |
447 | void nfs4_put_state_owner(struct nfs4_state_owner *sp) |
448 | { | |
1f0e890d | 449 | struct nfs_client *clp = sp->so_server->nfs_client; |
1da177e4 LT |
450 | struct rpc_cred *cred = sp->so_cred; |
451 | ||
452 | if (!atomic_dec_and_lock(&sp->so_count, &clp->cl_lock)) | |
453 | return; | |
9f958ab8 | 454 | nfs4_remove_state_owner(clp, sp); |
1da177e4 | 455 | spin_unlock(&clp->cl_lock); |
f6a1cc89 | 456 | rpc_destroy_wait_queue(&sp->so_sequence.wait); |
1da177e4 LT |
457 | put_rpccred(cred); |
458 | kfree(sp); | |
459 | } | |
460 | ||
461 | static struct nfs4_state * | |
462 | nfs4_alloc_open_state(void) | |
463 | { | |
464 | struct nfs4_state *state; | |
465 | ||
8535b2be | 466 | state = kzalloc(sizeof(*state), GFP_NOFS); |
1da177e4 LT |
467 | if (!state) |
468 | return NULL; | |
1da177e4 LT |
469 | atomic_set(&state->count, 1); |
470 | INIT_LIST_HEAD(&state->lock_states); | |
8d0a8a9d | 471 | spin_lock_init(&state->state_lock); |
8bda4e4c | 472 | seqlock_init(&state->seqlock); |
1da177e4 LT |
473 | return state; |
474 | } | |
475 | ||
4cecb76f | 476 | void |
dc0b027d | 477 | nfs4_state_set_mode_locked(struct nfs4_state *state, fmode_t fmode) |
4cecb76f | 478 | { |
dc0b027d | 479 | if (state->state == fmode) |
4cecb76f TM |
480 | return; |
481 | /* NB! List reordering - see the reclaim code for why. */ | |
dc0b027d TM |
482 | if ((fmode & FMODE_WRITE) != (state->state & FMODE_WRITE)) { |
483 | if (fmode & FMODE_WRITE) | |
4cecb76f TM |
484 | list_move(&state->open_states, &state->owner->so_states); |
485 | else | |
486 | list_move_tail(&state->open_states, &state->owner->so_states); | |
487 | } | |
dc0b027d | 488 | state->state = fmode; |
4cecb76f TM |
489 | } |
490 | ||
1da177e4 LT |
491 | static struct nfs4_state * |
492 | __nfs4_find_state_byowner(struct inode *inode, struct nfs4_state_owner *owner) | |
493 | { | |
494 | struct nfs_inode *nfsi = NFS_I(inode); | |
495 | struct nfs4_state *state; | |
496 | ||
497 | list_for_each_entry(state, &nfsi->open_states, inode_states) { | |
1c816efa | 498 | if (state->owner != owner) |
1da177e4 | 499 | continue; |
1c816efa | 500 | if (atomic_inc_not_zero(&state->count)) |
1da177e4 | 501 | return state; |
1da177e4 LT |
502 | } |
503 | return NULL; | |
504 | } | |
505 | ||
1da177e4 LT |
506 | static void |
507 | nfs4_free_open_state(struct nfs4_state *state) | |
508 | { | |
509 | kfree(state); | |
510 | } | |
511 | ||
512 | struct nfs4_state * | |
513 | nfs4_get_open_state(struct inode *inode, struct nfs4_state_owner *owner) | |
514 | { | |
515 | struct nfs4_state *state, *new; | |
516 | struct nfs_inode *nfsi = NFS_I(inode); | |
517 | ||
518 | spin_lock(&inode->i_lock); | |
519 | state = __nfs4_find_state_byowner(inode, owner); | |
520 | spin_unlock(&inode->i_lock); | |
521 | if (state) | |
522 | goto out; | |
523 | new = nfs4_alloc_open_state(); | |
ec073428 | 524 | spin_lock(&owner->so_lock); |
1da177e4 LT |
525 | spin_lock(&inode->i_lock); |
526 | state = __nfs4_find_state_byowner(inode, owner); | |
527 | if (state == NULL && new != NULL) { | |
528 | state = new; | |
1da177e4 LT |
529 | state->owner = owner; |
530 | atomic_inc(&owner->so_count); | |
531 | list_add(&state->inode_states, &nfsi->open_states); | |
532 | state->inode = igrab(inode); | |
533 | spin_unlock(&inode->i_lock); | |
ec073428 TM |
534 | /* Note: The reclaim code dictates that we add stateless |
535 | * and read-only stateids to the end of the list */ | |
536 | list_add_tail(&state->open_states, &owner->so_states); | |
537 | spin_unlock(&owner->so_lock); | |
1da177e4 LT |
538 | } else { |
539 | spin_unlock(&inode->i_lock); | |
ec073428 | 540 | spin_unlock(&owner->so_lock); |
1da177e4 LT |
541 | if (new) |
542 | nfs4_free_open_state(new); | |
543 | } | |
544 | out: | |
545 | return state; | |
546 | } | |
547 | ||
1da177e4 LT |
548 | void nfs4_put_open_state(struct nfs4_state *state) |
549 | { | |
550 | struct inode *inode = state->inode; | |
551 | struct nfs4_state_owner *owner = state->owner; | |
552 | ||
ec073428 | 553 | if (!atomic_dec_and_lock(&state->count, &owner->so_lock)) |
1da177e4 | 554 | return; |
ec073428 | 555 | spin_lock(&inode->i_lock); |
ba683031 | 556 | list_del(&state->inode_states); |
1da177e4 | 557 | list_del(&state->open_states); |
ec073428 TM |
558 | spin_unlock(&inode->i_lock); |
559 | spin_unlock(&owner->so_lock); | |
1da177e4 | 560 | iput(inode); |
1da177e4 LT |
561 | nfs4_free_open_state(state); |
562 | nfs4_put_state_owner(owner); | |
563 | } | |
564 | ||
565 | /* | |
83c9d41e | 566 | * Close the current file. |
1da177e4 | 567 | */ |
8535b2be TM |
568 | static void __nfs4_close(struct path *path, struct nfs4_state *state, |
569 | fmode_t fmode, gfp_t gfp_mask, int wait) | |
1da177e4 | 570 | { |
1da177e4 | 571 | struct nfs4_state_owner *owner = state->owner; |
003707c7 | 572 | int call_close = 0; |
dc0b027d | 573 | fmode_t newstate; |
1da177e4 LT |
574 | |
575 | atomic_inc(&owner->so_count); | |
1da177e4 | 576 | /* Protect against nfs4_find_state() */ |
ec073428 | 577 | spin_lock(&owner->so_lock); |
dc0b027d | 578 | switch (fmode & (FMODE_READ | FMODE_WRITE)) { |
e7616923 TM |
579 | case FMODE_READ: |
580 | state->n_rdonly--; | |
581 | break; | |
582 | case FMODE_WRITE: | |
583 | state->n_wronly--; | |
584 | break; | |
585 | case FMODE_READ|FMODE_WRITE: | |
586 | state->n_rdwr--; | |
587 | } | |
003707c7 | 588 | newstate = FMODE_READ|FMODE_WRITE; |
e7616923 | 589 | if (state->n_rdwr == 0) { |
003707c7 | 590 | if (state->n_rdonly == 0) { |
e7616923 | 591 | newstate &= ~FMODE_READ; |
003707c7 TM |
592 | call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags); |
593 | call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); | |
594 | } | |
595 | if (state->n_wronly == 0) { | |
e7616923 | 596 | newstate &= ~FMODE_WRITE; |
003707c7 TM |
597 | call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags); |
598 | call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); | |
599 | } | |
600 | if (newstate == 0) | |
601 | clear_bit(NFS_DELEGATED_STATE, &state->flags); | |
e7616923 | 602 | } |
003707c7 | 603 | nfs4_state_set_mode_locked(state, newstate); |
ec073428 | 604 | spin_unlock(&owner->so_lock); |
4cecb76f | 605 | |
003707c7 | 606 | if (!call_close) { |
b39e625b TM |
607 | nfs4_put_open_state(state); |
608 | nfs4_put_state_owner(owner); | |
f7e8917a FI |
609 | } else { |
610 | bool roc = pnfs_roc(state->inode); | |
611 | ||
612 | nfs4_do_close(path, state, gfp_mask, wait, roc); | |
613 | } | |
a49c3c77 TM |
614 | } |
615 | ||
dc0b027d | 616 | void nfs4_close_state(struct path *path, struct nfs4_state *state, fmode_t fmode) |
a49c3c77 | 617 | { |
8535b2be | 618 | __nfs4_close(path, state, fmode, GFP_NOFS, 0); |
a49c3c77 TM |
619 | } |
620 | ||
dc0b027d | 621 | void nfs4_close_sync(struct path *path, struct nfs4_state *state, fmode_t fmode) |
a49c3c77 | 622 | { |
8535b2be | 623 | __nfs4_close(path, state, fmode, GFP_KERNEL, 1); |
1da177e4 LT |
624 | } |
625 | ||
626 | /* | |
627 | * Search the state->lock_states for an existing lock_owner | |
628 | * that is compatible with current->files | |
629 | */ | |
630 | static struct nfs4_lock_state * | |
77041ed9 | 631 | __nfs4_find_lock_state(struct nfs4_state *state, fl_owner_t fl_owner, pid_t fl_pid, unsigned int type) |
1da177e4 LT |
632 | { |
633 | struct nfs4_lock_state *pos; | |
634 | list_for_each_entry(pos, &state->lock_states, ls_locks) { | |
77041ed9 | 635 | if (type != NFS4_ANY_LOCK_TYPE && pos->ls_owner.lo_type != type) |
1da177e4 | 636 | continue; |
77041ed9 TM |
637 | switch (pos->ls_owner.lo_type) { |
638 | case NFS4_POSIX_LOCK_TYPE: | |
639 | if (pos->ls_owner.lo_u.posix_owner != fl_owner) | |
640 | continue; | |
641 | break; | |
642 | case NFS4_FLOCK_LOCK_TYPE: | |
643 | if (pos->ls_owner.lo_u.flock_owner != fl_pid) | |
644 | continue; | |
645 | } | |
1da177e4 LT |
646 | atomic_inc(&pos->ls_count); |
647 | return pos; | |
648 | } | |
649 | return NULL; | |
650 | } | |
651 | ||
1da177e4 LT |
652 | /* |
653 | * Return a compatible lock_state. If no initialized lock_state structure | |
654 | * exists, return an uninitialized one. | |
655 | * | |
1da177e4 | 656 | */ |
77041ed9 | 657 | 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 |
658 | { |
659 | struct nfs4_lock_state *lsp; | |
1f0e890d | 660 | struct nfs_client *clp = state->owner->so_server->nfs_client; |
1da177e4 | 661 | |
8535b2be | 662 | lsp = kzalloc(sizeof(*lsp), GFP_NOFS); |
1da177e4 LT |
663 | if (lsp == NULL) |
664 | return NULL; | |
d0dc3701 TM |
665 | rpc_init_wait_queue(&lsp->ls_sequence.wait, "lock_seqid_waitqueue"); |
666 | spin_lock_init(&lsp->ls_sequence.lock); | |
667 | INIT_LIST_HEAD(&lsp->ls_sequence.list); | |
668 | lsp->ls_seqid.sequence = &lsp->ls_sequence; | |
1da177e4 | 669 | atomic_set(&lsp->ls_count, 1); |
b64aec8d | 670 | lsp->ls_state = state; |
77041ed9 TM |
671 | lsp->ls_owner.lo_type = type; |
672 | switch (lsp->ls_owner.lo_type) { | |
673 | case NFS4_FLOCK_LOCK_TYPE: | |
674 | lsp->ls_owner.lo_u.flock_owner = fl_pid; | |
675 | break; | |
676 | case NFS4_POSIX_LOCK_TYPE: | |
677 | lsp->ls_owner.lo_u.posix_owner = fl_owner; | |
678 | break; | |
679 | default: | |
680 | kfree(lsp); | |
681 | return NULL; | |
682 | } | |
1da177e4 | 683 | spin_lock(&clp->cl_lock); |
9f958ab8 | 684 | nfs_alloc_unique_id(&clp->cl_lockowner_id, &lsp->ls_id, 1, 64); |
1da177e4 | 685 | spin_unlock(&clp->cl_lock); |
8d0a8a9d | 686 | INIT_LIST_HEAD(&lsp->ls_locks); |
1da177e4 LT |
687 | return lsp; |
688 | } | |
689 | ||
9f958ab8 TM |
690 | static void nfs4_free_lock_state(struct nfs4_lock_state *lsp) |
691 | { | |
1f0e890d | 692 | struct nfs_client *clp = lsp->ls_state->owner->so_server->nfs_client; |
9f958ab8 TM |
693 | |
694 | spin_lock(&clp->cl_lock); | |
695 | nfs_free_unique_id(&clp->cl_lockowner_id, &lsp->ls_id); | |
696 | spin_unlock(&clp->cl_lock); | |
f6a1cc89 | 697 | rpc_destroy_wait_queue(&lsp->ls_sequence.wait); |
9f958ab8 TM |
698 | kfree(lsp); |
699 | } | |
700 | ||
1da177e4 LT |
701 | /* |
702 | * Return a compatible lock_state. If no initialized lock_state structure | |
703 | * exists, return an uninitialized one. | |
704 | * | |
1da177e4 | 705 | */ |
77041ed9 | 706 | static struct nfs4_lock_state *nfs4_get_lock_state(struct nfs4_state *state, fl_owner_t owner, pid_t pid, unsigned int type) |
1da177e4 | 707 | { |
8d0a8a9d | 708 | struct nfs4_lock_state *lsp, *new = NULL; |
1da177e4 | 709 | |
8d0a8a9d TM |
710 | for(;;) { |
711 | spin_lock(&state->state_lock); | |
77041ed9 | 712 | lsp = __nfs4_find_lock_state(state, owner, pid, type); |
8d0a8a9d TM |
713 | if (lsp != NULL) |
714 | break; | |
715 | if (new != NULL) { | |
8d0a8a9d TM |
716 | list_add(&new->ls_locks, &state->lock_states); |
717 | set_bit(LK_STATE_IN_USE, &state->flags); | |
718 | lsp = new; | |
719 | new = NULL; | |
720 | break; | |
721 | } | |
722 | spin_unlock(&state->state_lock); | |
77041ed9 | 723 | new = nfs4_alloc_lock_state(state, owner, pid, type); |
8d0a8a9d TM |
724 | if (new == NULL) |
725 | return NULL; | |
726 | } | |
727 | spin_unlock(&state->state_lock); | |
9f958ab8 TM |
728 | if (new != NULL) |
729 | nfs4_free_lock_state(new); | |
1da177e4 LT |
730 | return lsp; |
731 | } | |
732 | ||
733 | /* | |
8d0a8a9d TM |
734 | * Release reference to lock_state, and free it if we see that |
735 | * it is no longer in use | |
1da177e4 | 736 | */ |
faf5f49c | 737 | void nfs4_put_lock_state(struct nfs4_lock_state *lsp) |
1da177e4 | 738 | { |
8d0a8a9d | 739 | struct nfs4_state *state; |
1da177e4 | 740 | |
8d0a8a9d TM |
741 | if (lsp == NULL) |
742 | return; | |
743 | state = lsp->ls_state; | |
744 | if (!atomic_dec_and_lock(&lsp->ls_count, &state->state_lock)) | |
745 | return; | |
746 | list_del(&lsp->ls_locks); | |
747 | if (list_empty(&state->lock_states)) | |
748 | clear_bit(LK_STATE_IN_USE, &state->flags); | |
749 | spin_unlock(&state->state_lock); | |
d3c7b7cc TM |
750 | if (lsp->ls_flags & NFS_LOCK_INITIALIZED) |
751 | nfs4_release_lockowner(lsp); | |
9f958ab8 | 752 | nfs4_free_lock_state(lsp); |
1da177e4 LT |
753 | } |
754 | ||
8d0a8a9d | 755 | static void nfs4_fl_copy_lock(struct file_lock *dst, struct file_lock *src) |
1da177e4 | 756 | { |
8d0a8a9d | 757 | struct nfs4_lock_state *lsp = src->fl_u.nfs4_fl.owner; |
1da177e4 | 758 | |
8d0a8a9d TM |
759 | dst->fl_u.nfs4_fl.owner = lsp; |
760 | atomic_inc(&lsp->ls_count); | |
761 | } | |
1da177e4 | 762 | |
8d0a8a9d | 763 | static void nfs4_fl_release_lock(struct file_lock *fl) |
1da177e4 | 764 | { |
8d0a8a9d | 765 | nfs4_put_lock_state(fl->fl_u.nfs4_fl.owner); |
1da177e4 LT |
766 | } |
767 | ||
6aed6285 | 768 | static const struct file_lock_operations nfs4_fl_lock_ops = { |
8d0a8a9d TM |
769 | .fl_copy_lock = nfs4_fl_copy_lock, |
770 | .fl_release_private = nfs4_fl_release_lock, | |
771 | }; | |
772 | ||
773 | int nfs4_set_lock_state(struct nfs4_state *state, struct file_lock *fl) | |
1da177e4 | 774 | { |
8d0a8a9d TM |
775 | struct nfs4_lock_state *lsp; |
776 | ||
777 | if (fl->fl_ops != NULL) | |
778 | return 0; | |
77041ed9 TM |
779 | if (fl->fl_flags & FL_POSIX) |
780 | lsp = nfs4_get_lock_state(state, fl->fl_owner, 0, NFS4_POSIX_LOCK_TYPE); | |
781 | else if (fl->fl_flags & FL_FLOCK) | |
782 | lsp = nfs4_get_lock_state(state, 0, fl->fl_pid, NFS4_FLOCK_LOCK_TYPE); | |
783 | else | |
784 | return -EINVAL; | |
8d0a8a9d TM |
785 | if (lsp == NULL) |
786 | return -ENOMEM; | |
787 | fl->fl_u.nfs4_fl.owner = lsp; | |
788 | fl->fl_ops = &nfs4_fl_lock_ops; | |
789 | return 0; | |
1da177e4 LT |
790 | } |
791 | ||
8d0a8a9d TM |
792 | /* |
793 | * Byte-range lock aware utility to initialize the stateid of read/write | |
794 | * requests. | |
1da177e4 | 795 | */ |
77041ed9 | 796 | void nfs4_copy_stateid(nfs4_stateid *dst, struct nfs4_state *state, fl_owner_t fl_owner, pid_t fl_pid) |
1da177e4 | 797 | { |
8d0a8a9d | 798 | struct nfs4_lock_state *lsp; |
8bda4e4c | 799 | int seq; |
1da177e4 | 800 | |
8bda4e4c TM |
801 | do { |
802 | seq = read_seqbegin(&state->seqlock); | |
803 | memcpy(dst, &state->stateid, sizeof(*dst)); | |
804 | } while (read_seqretry(&state->seqlock, seq)); | |
8d0a8a9d TM |
805 | if (test_bit(LK_STATE_IN_USE, &state->flags) == 0) |
806 | return; | |
1da177e4 | 807 | |
8d0a8a9d | 808 | spin_lock(&state->state_lock); |
77041ed9 | 809 | lsp = __nfs4_find_lock_state(state, fl_owner, fl_pid, NFS4_ANY_LOCK_TYPE); |
8d0a8a9d TM |
810 | if (lsp != NULL && (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0) |
811 | memcpy(dst, &lsp->ls_stateid, sizeof(*dst)); | |
812 | spin_unlock(&state->state_lock); | |
1da177e4 LT |
813 | nfs4_put_lock_state(lsp); |
814 | } | |
815 | ||
8535b2be | 816 | struct nfs_seqid *nfs_alloc_seqid(struct nfs_seqid_counter *counter, gfp_t gfp_mask) |
cee54fc9 | 817 | { |
cee54fc9 TM |
818 | struct nfs_seqid *new; |
819 | ||
8535b2be | 820 | new = kmalloc(sizeof(*new), gfp_mask); |
cee54fc9 TM |
821 | if (new != NULL) { |
822 | new->sequence = counter; | |
2f74c0a0 | 823 | INIT_LIST_HEAD(&new->list); |
cee54fc9 TM |
824 | } |
825 | return new; | |
826 | } | |
827 | ||
72211dbe | 828 | void nfs_release_seqid(struct nfs_seqid *seqid) |
1da177e4 | 829 | { |
2f74c0a0 TM |
830 | if (!list_empty(&seqid->list)) { |
831 | struct rpc_sequence *sequence = seqid->sequence->sequence; | |
cee54fc9 | 832 | |
2f74c0a0 | 833 | spin_lock(&sequence->lock); |
72211dbe | 834 | list_del_init(&seqid->list); |
2f74c0a0 TM |
835 | spin_unlock(&sequence->lock); |
836 | rpc_wake_up(&sequence->wait); | |
837 | } | |
72211dbe TM |
838 | } |
839 | ||
840 | void nfs_free_seqid(struct nfs_seqid *seqid) | |
841 | { | |
842 | nfs_release_seqid(seqid); | |
cee54fc9 | 843 | kfree(seqid); |
1da177e4 LT |
844 | } |
845 | ||
846 | /* | |
cee54fc9 TM |
847 | * Increment the seqid if the OPEN/OPEN_DOWNGRADE/CLOSE succeeded, or |
848 | * failed with a seqid incrementing error - | |
849 | * see comments nfs_fs.h:seqid_mutating_error() | |
850 | */ | |
88d90939 | 851 | static void nfs_increment_seqid(int status, struct nfs_seqid *seqid) |
cee54fc9 | 852 | { |
2f74c0a0 | 853 | BUG_ON(list_first_entry(&seqid->sequence->sequence->list, struct nfs_seqid, list) != seqid); |
cee54fc9 TM |
854 | switch (status) { |
855 | case 0: | |
856 | break; | |
857 | case -NFS4ERR_BAD_SEQID: | |
6f43ddcc TM |
858 | if (seqid->sequence->flags & NFS_SEQID_CONFIRMED) |
859 | return; | |
860 | printk(KERN_WARNING "NFS: v4 server returned a bad" | |
497799e7 DM |
861 | " sequence-id error on an" |
862 | " unconfirmed sequence %p!\n", | |
6f43ddcc | 863 | seqid->sequence); |
cee54fc9 TM |
864 | case -NFS4ERR_STALE_CLIENTID: |
865 | case -NFS4ERR_STALE_STATEID: | |
866 | case -NFS4ERR_BAD_STATEID: | |
867 | case -NFS4ERR_BADXDR: | |
868 | case -NFS4ERR_RESOURCE: | |
869 | case -NFS4ERR_NOFILEHANDLE: | |
870 | /* Non-seqid mutating errors */ | |
871 | return; | |
872 | }; | |
873 | /* | |
874 | * Note: no locking needed as we are guaranteed to be first | |
875 | * on the sequence list | |
876 | */ | |
877 | seqid->sequence->counter++; | |
878 | } | |
879 | ||
880 | void nfs_increment_open_seqid(int status, struct nfs_seqid *seqid) | |
881 | { | |
34dc1ad7 BH |
882 | struct nfs4_state_owner *sp = container_of(seqid->sequence, |
883 | struct nfs4_state_owner, so_seqid); | |
884 | struct nfs_server *server = sp->so_server; | |
885 | ||
886 | if (status == -NFS4ERR_BAD_SEQID) | |
1da177e4 | 887 | nfs4_drop_state_owner(sp); |
34dc1ad7 BH |
888 | if (!nfs4_has_session(server->nfs_client)) |
889 | nfs_increment_seqid(status, seqid); | |
cee54fc9 TM |
890 | } |
891 | ||
892 | /* | |
cee54fc9 TM |
893 | * Increment the seqid if the LOCK/LOCKU succeeded, or |
894 | * failed with a seqid incrementing error - | |
895 | * see comments nfs_fs.h:seqid_mutating_error() | |
896 | */ | |
897 | void nfs_increment_lock_seqid(int status, struct nfs_seqid *seqid) | |
898 | { | |
88d90939 | 899 | nfs_increment_seqid(status, seqid); |
cee54fc9 TM |
900 | } |
901 | ||
902 | int nfs_wait_on_sequence(struct nfs_seqid *seqid, struct rpc_task *task) | |
903 | { | |
904 | struct rpc_sequence *sequence = seqid->sequence->sequence; | |
905 | int status = 0; | |
906 | ||
907 | spin_lock(&sequence->lock); | |
2f74c0a0 TM |
908 | if (list_empty(&seqid->list)) |
909 | list_add_tail(&seqid->list, &sequence->list); | |
910 | if (list_first_entry(&sequence->list, struct nfs_seqid, list) == seqid) | |
911 | goto unlock; | |
5d00837b | 912 | rpc_sleep_on(&sequence->wait, task, NULL); |
2f74c0a0 TM |
913 | status = -EAGAIN; |
914 | unlock: | |
cee54fc9 TM |
915 | spin_unlock(&sequence->lock); |
916 | return status; | |
1da177e4 LT |
917 | } |
918 | ||
e005e804 | 919 | static int nfs4_run_state_manager(void *); |
1da177e4 | 920 | |
e005e804 | 921 | static void nfs4_clear_state_manager_bit(struct nfs_client *clp) |
433fbe4c TM |
922 | { |
923 | smp_mb__before_clear_bit(); | |
e005e804 | 924 | clear_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state); |
433fbe4c | 925 | smp_mb__after_clear_bit(); |
e005e804 | 926 | wake_up_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING); |
433fbe4c TM |
927 | rpc_wake_up(&clp->cl_rpcwaitq); |
928 | } | |
929 | ||
1da177e4 | 930 | /* |
e005e804 | 931 | * Schedule the nfs_client asynchronous state management routine |
1da177e4 | 932 | */ |
b0d3ded1 | 933 | void nfs4_schedule_state_manager(struct nfs_client *clp) |
1da177e4 | 934 | { |
5043e900 | 935 | struct task_struct *task; |
1da177e4 | 936 | |
e005e804 TM |
937 | if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) != 0) |
938 | return; | |
5043e900 TM |
939 | __module_get(THIS_MODULE); |
940 | atomic_inc(&clp->cl_count); | |
e005e804 | 941 | task = kthread_run(nfs4_run_state_manager, clp, "%s-manager", |
5d8515ca CL |
942 | rpc_peeraddr2str(clp->cl_rpcclient, |
943 | RPC_DISPLAY_ADDR)); | |
5043e900 TM |
944 | if (!IS_ERR(task)) |
945 | return; | |
e005e804 | 946 | nfs4_clear_state_manager_bit(clp); |
24c8dbbb | 947 | nfs_put_client(clp); |
5043e900 | 948 | module_put(THIS_MODULE); |
1da177e4 LT |
949 | } |
950 | ||
951 | /* | |
952 | * Schedule a state recovery attempt | |
953 | */ | |
adfa6f98 | 954 | void nfs4_schedule_state_recovery(struct nfs_client *clp) |
1da177e4 LT |
955 | { |
956 | if (!clp) | |
957 | return; | |
e598d843 TM |
958 | if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
959 | set_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); | |
e005e804 | 960 | nfs4_schedule_state_manager(clp); |
1da177e4 LT |
961 | } |
962 | ||
a2c0b9e2 | 963 | int nfs4_state_mark_reclaim_reboot(struct nfs_client *clp, struct nfs4_state *state) |
b79a4a1b TM |
964 | { |
965 | ||
966 | set_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); | |
967 | /* Don't recover state that expired before the reboot */ | |
968 | if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) { | |
969 | clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); | |
970 | return 0; | |
971 | } | |
7eff03ae | 972 | set_bit(NFS_OWNER_RECLAIM_REBOOT, &state->owner->so_flags); |
b79a4a1b TM |
973 | set_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state); |
974 | return 1; | |
975 | } | |
976 | ||
9e33bed5 | 977 | int nfs4_state_mark_reclaim_nograce(struct nfs_client *clp, struct nfs4_state *state) |
b79a4a1b TM |
978 | { |
979 | set_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags); | |
980 | clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); | |
7eff03ae | 981 | set_bit(NFS_OWNER_RECLAIM_NOGRACE, &state->owner->so_flags); |
b79a4a1b TM |
982 | set_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state); |
983 | return 1; | |
984 | } | |
985 | ||
02860014 | 986 | static int nfs4_reclaim_locks(struct nfs4_state *state, const struct nfs4_state_recovery_ops *ops) |
1da177e4 LT |
987 | { |
988 | struct inode *inode = state->inode; | |
19e03c57 | 989 | struct nfs_inode *nfsi = NFS_I(inode); |
1da177e4 LT |
990 | struct file_lock *fl; |
991 | int status = 0; | |
992 | ||
3f09df70 TM |
993 | if (inode->i_flock == NULL) |
994 | return 0; | |
995 | ||
996 | /* Guard against delegation returns and new lock/unlock calls */ | |
19e03c57 | 997 | down_write(&nfsi->rwsem); |
3f09df70 | 998 | /* Protect inode->i_flock using the BKL */ |
b89f4321 | 999 | lock_flocks(); |
90dc7d27 | 1000 | for (fl = inode->i_flock; fl != NULL; fl = fl->fl_next) { |
43b2a33a | 1001 | if (!(fl->fl_flags & (FL_POSIX|FL_FLOCK))) |
1da177e4 | 1002 | continue; |
cd3758e3 | 1003 | if (nfs_file_open_context(fl->fl_file)->state != state) |
1da177e4 | 1004 | continue; |
b89f4321 | 1005 | unlock_flocks(); |
1da177e4 | 1006 | status = ops->recover_lock(state, fl); |
1da177e4 | 1007 | switch (status) { |
965b5d67 TM |
1008 | case 0: |
1009 | break; | |
1010 | case -ESTALE: | |
1011 | case -NFS4ERR_ADMIN_REVOKED: | |
1012 | case -NFS4ERR_STALE_STATEID: | |
1013 | case -NFS4ERR_BAD_STATEID: | |
1014 | case -NFS4ERR_EXPIRED: | |
1015 | case -NFS4ERR_NO_GRACE: | |
1016 | case -NFS4ERR_STALE_CLIENTID: | |
9c4c761a TM |
1017 | case -NFS4ERR_BADSESSION: |
1018 | case -NFS4ERR_BADSLOT: | |
1019 | case -NFS4ERR_BAD_HIGH_SLOT: | |
1020 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
965b5d67 | 1021 | goto out; |
1da177e4 LT |
1022 | default: |
1023 | printk(KERN_ERR "%s: unhandled error %d. Zeroing state\n", | |
3110ff80 | 1024 | __func__, status); |
965b5d67 TM |
1025 | case -ENOMEM: |
1026 | case -NFS4ERR_DENIED: | |
1da177e4 LT |
1027 | case -NFS4ERR_RECLAIM_BAD: |
1028 | case -NFS4ERR_RECLAIM_CONFLICT: | |
43b2a33a | 1029 | /* kill_proc(fl->fl_pid, SIGLOST, 1); */ |
965b5d67 | 1030 | status = 0; |
1da177e4 | 1031 | } |
b89f4321 | 1032 | lock_flocks(); |
1da177e4 | 1033 | } |
b89f4321 | 1034 | unlock_flocks(); |
965b5d67 | 1035 | out: |
19e03c57 | 1036 | up_write(&nfsi->rwsem); |
1da177e4 LT |
1037 | return status; |
1038 | } | |
1039 | ||
02860014 | 1040 | static int nfs4_reclaim_open_state(struct nfs4_state_owner *sp, const struct nfs4_state_recovery_ops *ops) |
1da177e4 LT |
1041 | { |
1042 | struct nfs4_state *state; | |
1043 | struct nfs4_lock_state *lock; | |
1044 | int status = 0; | |
1045 | ||
1046 | /* Note: we rely on the sp->so_states list being ordered | |
1047 | * so that we always reclaim open(O_RDWR) and/or open(O_WRITE) | |
1048 | * states first. | |
1049 | * This is needed to ensure that the server won't give us any | |
1050 | * read delegations that we have to return if, say, we are | |
1051 | * recovering after a network partition or a reboot from a | |
1052 | * server that doesn't support a grace period. | |
1053 | */ | |
fe1d8195 TM |
1054 | restart: |
1055 | spin_lock(&sp->so_lock); | |
1da177e4 | 1056 | list_for_each_entry(state, &sp->so_states, open_states) { |
b79a4a1b TM |
1057 | if (!test_and_clear_bit(ops->state_flag_bit, &state->flags)) |
1058 | continue; | |
1da177e4 LT |
1059 | if (state->state == 0) |
1060 | continue; | |
fe1d8195 TM |
1061 | atomic_inc(&state->count); |
1062 | spin_unlock(&sp->so_lock); | |
1da177e4 | 1063 | status = ops->recover_open(sp, state); |
1da177e4 | 1064 | if (status >= 0) { |
02860014 TM |
1065 | status = nfs4_reclaim_locks(state, ops); |
1066 | if (status >= 0) { | |
1067 | list_for_each_entry(lock, &state->lock_states, ls_locks) { | |
1068 | if (!(lock->ls_flags & NFS_LOCK_INITIALIZED)) | |
1069 | printk("%s: Lock reclaim failed!\n", | |
3110ff80 | 1070 | __func__); |
02860014 | 1071 | } |
fe1d8195 TM |
1072 | nfs4_put_open_state(state); |
1073 | goto restart; | |
1da177e4 | 1074 | } |
1da177e4 LT |
1075 | } |
1076 | switch (status) { | |
1077 | default: | |
1078 | printk(KERN_ERR "%s: unhandled error %d. Zeroing state\n", | |
3110ff80 | 1079 | __func__, status); |
1da177e4 | 1080 | case -ENOENT: |
965b5d67 | 1081 | case -ENOMEM: |
b79a4a1b | 1082 | case -ESTALE: |
1da177e4 LT |
1083 | /* |
1084 | * Open state on this file cannot be recovered | |
1085 | * All we can do is revert to using the zero stateid. | |
1086 | */ | |
1087 | memset(state->stateid.data, 0, | |
1088 | sizeof(state->stateid.data)); | |
1089 | /* Mark the file as being 'closed' */ | |
1090 | state->state = 0; | |
1091 | break; | |
168667c4 TM |
1092 | case -EKEYEXPIRED: |
1093 | /* | |
1094 | * User RPCSEC_GSS context has expired. | |
1095 | * We cannot recover this stateid now, so | |
1096 | * skip it and allow recovery thread to | |
1097 | * proceed. | |
1098 | */ | |
1099 | break; | |
965b5d67 TM |
1100 | case -NFS4ERR_ADMIN_REVOKED: |
1101 | case -NFS4ERR_STALE_STATEID: | |
1102 | case -NFS4ERR_BAD_STATEID: | |
b79a4a1b TM |
1103 | case -NFS4ERR_RECLAIM_BAD: |
1104 | case -NFS4ERR_RECLAIM_CONFLICT: | |
1f0e890d | 1105 | nfs4_state_mark_reclaim_nograce(sp->so_server->nfs_client, state); |
b79a4a1b | 1106 | break; |
1da177e4 LT |
1107 | case -NFS4ERR_EXPIRED: |
1108 | case -NFS4ERR_NO_GRACE: | |
1f0e890d | 1109 | nfs4_state_mark_reclaim_nograce(sp->so_server->nfs_client, state); |
1da177e4 | 1110 | case -NFS4ERR_STALE_CLIENTID: |
9c4c761a TM |
1111 | case -NFS4ERR_BADSESSION: |
1112 | case -NFS4ERR_BADSLOT: | |
1113 | case -NFS4ERR_BAD_HIGH_SLOT: | |
1114 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
1da177e4 LT |
1115 | goto out_err; |
1116 | } | |
fe1d8195 TM |
1117 | nfs4_put_open_state(state); |
1118 | goto restart; | |
1da177e4 | 1119 | } |
fe1d8195 | 1120 | spin_unlock(&sp->so_lock); |
1da177e4 LT |
1121 | return 0; |
1122 | out_err: | |
fe1d8195 | 1123 | nfs4_put_open_state(state); |
1da177e4 LT |
1124 | return status; |
1125 | } | |
1126 | ||
b79a4a1b TM |
1127 | static void nfs4_clear_open_state(struct nfs4_state *state) |
1128 | { | |
1129 | struct nfs4_lock_state *lock; | |
1130 | ||
1131 | clear_bit(NFS_DELEGATED_STATE, &state->flags); | |
1132 | clear_bit(NFS_O_RDONLY_STATE, &state->flags); | |
1133 | clear_bit(NFS_O_WRONLY_STATE, &state->flags); | |
1134 | clear_bit(NFS_O_RDWR_STATE, &state->flags); | |
1135 | list_for_each_entry(lock, &state->lock_states, ls_locks) { | |
b79a4a1b TM |
1136 | lock->ls_seqid.flags = 0; |
1137 | lock->ls_flags &= ~NFS_LOCK_INITIALIZED; | |
1138 | } | |
1139 | } | |
1140 | ||
1141 | static void nfs4_state_mark_reclaim_helper(struct nfs_client *clp, int (*mark_reclaim)(struct nfs_client *clp, struct nfs4_state *state)) | |
cee54fc9 TM |
1142 | { |
1143 | struct nfs4_state_owner *sp; | |
9f958ab8 | 1144 | struct rb_node *pos; |
cee54fc9 | 1145 | struct nfs4_state *state; |
cee54fc9 TM |
1146 | |
1147 | /* Reset all sequence ids to zero */ | |
9f958ab8 TM |
1148 | for (pos = rb_first(&clp->cl_state_owners); pos != NULL; pos = rb_next(pos)) { |
1149 | sp = rb_entry(pos, struct nfs4_state_owner, so_client_node); | |
cee54fc9 | 1150 | sp->so_seqid.flags = 0; |
ec073428 | 1151 | spin_lock(&sp->so_lock); |
cee54fc9 | 1152 | list_for_each_entry(state, &sp->so_states, open_states) { |
b79a4a1b TM |
1153 | if (mark_reclaim(clp, state)) |
1154 | nfs4_clear_open_state(state); | |
cee54fc9 | 1155 | } |
ec073428 | 1156 | spin_unlock(&sp->so_lock); |
cee54fc9 TM |
1157 | } |
1158 | } | |
1159 | ||
b79a4a1b TM |
1160 | static void nfs4_state_start_reclaim_reboot(struct nfs_client *clp) |
1161 | { | |
1162 | /* Mark all delegations for reclaim */ | |
1163 | nfs_delegation_mark_reclaim(clp); | |
1164 | nfs4_state_mark_reclaim_helper(clp, nfs4_state_mark_reclaim_reboot); | |
1165 | } | |
1166 | ||
fce5c838 RL |
1167 | static void nfs4_reclaim_complete(struct nfs_client *clp, |
1168 | const struct nfs4_state_recovery_ops *ops) | |
1169 | { | |
1170 | /* Notify the server we're done reclaiming our state */ | |
1171 | if (ops->reclaim_complete) | |
1172 | (void)ops->reclaim_complete(clp); | |
1173 | } | |
1174 | ||
6eaa6149 | 1175 | static int nfs4_state_clear_reclaim_reboot(struct nfs_client *clp) |
b79a4a1b TM |
1176 | { |
1177 | struct nfs4_state_owner *sp; | |
1178 | struct rb_node *pos; | |
1179 | struct nfs4_state *state; | |
1180 | ||
1181 | if (!test_and_clear_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) | |
6eaa6149 | 1182 | return 0; |
7cab89b2 | 1183 | |
b79a4a1b TM |
1184 | for (pos = rb_first(&clp->cl_state_owners); pos != NULL; pos = rb_next(pos)) { |
1185 | sp = rb_entry(pos, struct nfs4_state_owner, so_client_node); | |
1186 | spin_lock(&sp->so_lock); | |
1187 | list_for_each_entry(state, &sp->so_states, open_states) { | |
1188 | if (!test_and_clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags)) | |
1189 | continue; | |
1190 | nfs4_state_mark_reclaim_nograce(clp, state); | |
1191 | } | |
1192 | spin_unlock(&sp->so_lock); | |
1193 | } | |
1194 | ||
1195 | nfs_delegation_reap_unclaimed(clp); | |
6eaa6149 TM |
1196 | return 1; |
1197 | } | |
1198 | ||
1199 | static void nfs4_state_end_reclaim_reboot(struct nfs_client *clp) | |
1200 | { | |
1201 | if (!nfs4_state_clear_reclaim_reboot(clp)) | |
1202 | return; | |
1203 | nfs4_reclaim_complete(clp, clp->cl_mvops->reboot_recovery_ops); | |
b79a4a1b TM |
1204 | } |
1205 | ||
1206 | static void nfs_delegation_clear_all(struct nfs_client *clp) | |
1207 | { | |
1208 | nfs_delegation_mark_reclaim(clp); | |
1209 | nfs_delegation_reap_unclaimed(clp); | |
1210 | } | |
1211 | ||
1212 | static void nfs4_state_start_reclaim_nograce(struct nfs_client *clp) | |
1213 | { | |
1214 | nfs_delegation_clear_all(clp); | |
1215 | nfs4_state_mark_reclaim_helper(clp, nfs4_state_mark_reclaim_nograce); | |
1216 | } | |
1217 | ||
168667c4 TM |
1218 | static void nfs4_warn_keyexpired(const char *s) |
1219 | { | |
1220 | printk_ratelimited(KERN_WARNING "Error: state manager" | |
1221 | " encountered RPCSEC_GSS session" | |
1222 | " expired against NFSv4 server %s.\n", | |
1223 | s); | |
1224 | } | |
1225 | ||
4f7cdf18 | 1226 | static int nfs4_recovery_handle_error(struct nfs_client *clp, int error) |
e598d843 TM |
1227 | { |
1228 | switch (error) { | |
1229 | case -NFS4ERR_CB_PATH_DOWN: | |
707fb4b3 | 1230 | nfs_handle_cb_pathdown(clp); |
4f7cdf18 | 1231 | return 0; |
c8b7ae3d TM |
1232 | case -NFS4ERR_NO_GRACE: |
1233 | nfs4_state_end_reclaim_reboot(clp); | |
1234 | return 0; | |
e598d843 TM |
1235 | case -NFS4ERR_STALE_CLIENTID: |
1236 | case -NFS4ERR_LEASE_MOVED: | |
1237 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
6eaa6149 | 1238 | nfs4_state_clear_reclaim_reboot(clp); |
e598d843 TM |
1239 | nfs4_state_start_reclaim_reboot(clp); |
1240 | break; | |
1241 | case -NFS4ERR_EXPIRED: | |
1242 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1243 | nfs4_state_start_reclaim_nograce(clp); | |
8ba9bf8e | 1244 | break; |
c3fad1b1 AA |
1245 | case -NFS4ERR_BADSESSION: |
1246 | case -NFS4ERR_BADSLOT: | |
1247 | case -NFS4ERR_BAD_HIGH_SLOT: | |
1248 | case -NFS4ERR_DEADSESSION: | |
1249 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
1250 | case -NFS4ERR_SEQ_FALSE_RETRY: | |
1251 | case -NFS4ERR_SEQ_MISORDERED: | |
6df08189 | 1252 | set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); |
0b9e2d41 AA |
1253 | /* Zero session reset errors */ |
1254 | return 0; | |
168667c4 TM |
1255 | case -EKEYEXPIRED: |
1256 | /* Nothing we can do */ | |
1257 | nfs4_warn_keyexpired(clp->cl_hostname); | |
1258 | return 0; | |
e598d843 | 1259 | } |
4f7cdf18 | 1260 | return error; |
e598d843 TM |
1261 | } |
1262 | ||
02860014 | 1263 | static int nfs4_do_reclaim(struct nfs_client *clp, const struct nfs4_state_recovery_ops *ops) |
1da177e4 | 1264 | { |
9f958ab8 | 1265 | struct rb_node *pos; |
1da177e4 LT |
1266 | int status = 0; |
1267 | ||
7eff03ae TM |
1268 | restart: |
1269 | spin_lock(&clp->cl_lock); | |
02860014 TM |
1270 | for (pos = rb_first(&clp->cl_state_owners); pos != NULL; pos = rb_next(pos)) { |
1271 | struct nfs4_state_owner *sp = rb_entry(pos, struct nfs4_state_owner, so_client_node); | |
7eff03ae TM |
1272 | if (!test_and_clear_bit(ops->owner_flag_bit, &sp->so_flags)) |
1273 | continue; | |
1274 | atomic_inc(&sp->so_count); | |
1275 | spin_unlock(&clp->cl_lock); | |
02860014 | 1276 | status = nfs4_reclaim_open_state(sp, ops); |
7eff03ae TM |
1277 | if (status < 0) { |
1278 | set_bit(ops->owner_flag_bit, &sp->so_flags); | |
1279 | nfs4_put_state_owner(sp); | |
4f7cdf18 | 1280 | return nfs4_recovery_handle_error(clp, status); |
7eff03ae TM |
1281 | } |
1282 | nfs4_put_state_owner(sp); | |
1283 | goto restart; | |
02860014 | 1284 | } |
7eff03ae | 1285 | spin_unlock(&clp->cl_lock); |
02860014 TM |
1286 | return status; |
1287 | } | |
1288 | ||
1289 | static int nfs4_check_lease(struct nfs_client *clp) | |
1290 | { | |
1291 | struct rpc_cred *cred; | |
c48f4f35 TM |
1292 | const struct nfs4_state_maintenance_ops *ops = |
1293 | clp->cl_mvops->state_renewal_ops; | |
02860014 | 1294 | int status = -NFS4ERR_EXPIRED; |
1da177e4 | 1295 | |
0f605b56 TM |
1296 | /* Is the client already known to have an expired lease? */ |
1297 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) | |
1298 | return 0; | |
a7b72103 AA |
1299 | spin_lock(&clp->cl_lock); |
1300 | cred = ops->get_state_renewal_cred_locked(clp); | |
1301 | spin_unlock(&clp->cl_lock); | |
0f605b56 TM |
1302 | if (cred == NULL) { |
1303 | cred = nfs4_get_setclientid_cred(clp); | |
1304 | if (cred == NULL) | |
1305 | goto out; | |
286d7d6a | 1306 | } |
8e69514f | 1307 | status = ops->renew_lease(clp, cred); |
0f605b56 TM |
1308 | put_rpccred(cred); |
1309 | out: | |
4f7cdf18 | 1310 | return nfs4_recovery_handle_error(clp, status); |
02860014 TM |
1311 | } |
1312 | ||
1313 | static int nfs4_reclaim_lease(struct nfs_client *clp) | |
1314 | { | |
1315 | struct rpc_cred *cred; | |
c48f4f35 TM |
1316 | const struct nfs4_state_recovery_ops *ops = |
1317 | clp->cl_mvops->reboot_recovery_ops; | |
02860014 TM |
1318 | int status = -ENOENT; |
1319 | ||
90a16617 | 1320 | cred = ops->get_clid_cred(clp); |
286d7d6a | 1321 | if (cred != NULL) { |
591d71cb | 1322 | status = ops->establish_clid(clp, cred); |
286d7d6a | 1323 | put_rpccred(cred); |
a2b2bb88 TM |
1324 | /* Handle case where the user hasn't set up machine creds */ |
1325 | if (status == -EACCES && cred == clp->cl_machine_cred) { | |
1326 | nfs4_clear_machine_cred(clp); | |
02860014 | 1327 | status = -EAGAIN; |
a2b2bb88 | 1328 | } |
c2e713dd BH |
1329 | if (status == -NFS4ERR_MINOR_VERS_MISMATCH) |
1330 | status = -EPROTONOSUPPORT; | |
286d7d6a | 1331 | } |
02860014 TM |
1332 | return status; |
1333 | } | |
1334 | ||
76db6d95 | 1335 | #ifdef CONFIG_NFS_V4_1 |
b9efa1b2 AA |
1336 | void nfs41_handle_recall_slot(struct nfs_client *clp) |
1337 | { | |
1338 | set_bit(NFS4CLNT_RECALL_SLOT, &clp->cl_state); | |
1339 | nfs4_schedule_state_recovery(clp); | |
1340 | } | |
1341 | ||
0f79fd6f TM |
1342 | static void nfs4_reset_all_state(struct nfs_client *clp) |
1343 | { | |
1344 | if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) == 0) { | |
1345 | clp->cl_boot_time = CURRENT_TIME; | |
1346 | nfs4_state_start_reclaim_nograce(clp); | |
1347 | nfs4_schedule_state_recovery(clp); | |
1348 | } | |
1349 | } | |
1350 | ||
1351 | static void nfs41_handle_server_reboot(struct nfs_client *clp) | |
1352 | { | |
1353 | if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) == 0) { | |
1354 | nfs4_state_start_reclaim_reboot(clp); | |
1355 | nfs4_schedule_state_recovery(clp); | |
1356 | } | |
1357 | } | |
1358 | ||
1359 | static void nfs41_handle_state_revoked(struct nfs_client *clp) | |
1360 | { | |
1361 | /* Temporary */ | |
1362 | nfs4_reset_all_state(clp); | |
1363 | } | |
1364 | ||
1365 | static void nfs41_handle_recallable_state_revoked(struct nfs_client *clp) | |
1366 | { | |
1367 | /* This will need to handle layouts too */ | |
1368 | nfs_expire_all_delegations(clp); | |
1369 | } | |
1370 | ||
1371 | static void nfs41_handle_cb_path_down(struct nfs_client *clp) | |
1372 | { | |
1373 | nfs_expire_all_delegations(clp); | |
1374 | if (test_and_set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state) == 0) | |
1375 | nfs4_schedule_state_recovery(clp); | |
1376 | } | |
1377 | ||
0629e370 AB |
1378 | void nfs41_handle_sequence_flag_errors(struct nfs_client *clp, u32 flags) |
1379 | { | |
1380 | if (!flags) | |
1381 | return; | |
0f79fd6f TM |
1382 | else if (flags & SEQ4_STATUS_RESTART_RECLAIM_NEEDED) |
1383 | nfs41_handle_server_reboot(clp); | |
1384 | else if (flags & (SEQ4_STATUS_EXPIRED_ALL_STATE_REVOKED | | |
0629e370 AB |
1385 | SEQ4_STATUS_EXPIRED_SOME_STATE_REVOKED | |
1386 | SEQ4_STATUS_ADMIN_STATE_REVOKED | | |
0f79fd6f TM |
1387 | SEQ4_STATUS_LEASE_MOVED)) |
1388 | nfs41_handle_state_revoked(clp); | |
1389 | else if (flags & SEQ4_STATUS_RECALLABLE_STATE_REVOKED) | |
1390 | nfs41_handle_recallable_state_revoked(clp); | |
1391 | else if (flags & (SEQ4_STATUS_CB_PATH_DOWN | | |
0629e370 AB |
1392 | SEQ4_STATUS_BACKCHANNEL_FAULT | |
1393 | SEQ4_STATUS_CB_PATH_DOWN_SESSION)) | |
0f79fd6f | 1394 | nfs41_handle_cb_path_down(clp); |
0629e370 AB |
1395 | } |
1396 | ||
c3fad1b1 AA |
1397 | static int nfs4_reset_session(struct nfs_client *clp) |
1398 | { | |
1399 | int status; | |
1400 | ||
38045412 | 1401 | nfs4_begin_drain_session(clp); |
c3fad1b1 AA |
1402 | status = nfs4_proc_destroy_session(clp->cl_session); |
1403 | if (status && status != -NFS4ERR_BADSESSION && | |
1404 | status != -NFS4ERR_DEADSESSION) { | |
f455848a | 1405 | status = nfs4_recovery_handle_error(clp, status); |
c3fad1b1 AA |
1406 | goto out; |
1407 | } | |
1408 | ||
1409 | memset(clp->cl_session->sess_id.data, 0, NFS4_MAX_SESSIONID_LEN); | |
f26468fb | 1410 | status = nfs4_proc_create_session(clp); |
41f54a55 | 1411 | if (status) { |
f455848a | 1412 | status = nfs4_recovery_handle_error(clp, status); |
41f54a55 AA |
1413 | goto out; |
1414 | } | |
1415 | /* create_session negotiated new slot table */ | |
1416 | clear_bit(NFS4CLNT_RECALL_SLOT, &clp->cl_state); | |
9dfdf404 | 1417 | |
41f54a55 AA |
1418 | /* Let the state manager reestablish state */ |
1419 | if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) | |
5601a00d | 1420 | nfs41_setup_state_renewal(clp); |
41f54a55 | 1421 | out: |
c3fad1b1 AA |
1422 | return status; |
1423 | } | |
76db6d95 | 1424 | |
b9efa1b2 AA |
1425 | static int nfs4_recall_slot(struct nfs_client *clp) |
1426 | { | |
1427 | struct nfs4_slot_table *fc_tbl = &clp->cl_session->fc_slot_table; | |
1428 | struct nfs4_channel_attrs *fc_attrs = &clp->cl_session->fc_attrs; | |
1429 | struct nfs4_slot *new, *old; | |
1430 | int i; | |
1431 | ||
1432 | nfs4_begin_drain_session(clp); | |
1433 | new = kmalloc(fc_tbl->target_max_slots * sizeof(struct nfs4_slot), | |
8535b2be | 1434 | GFP_NOFS); |
b9efa1b2 AA |
1435 | if (!new) |
1436 | return -ENOMEM; | |
1437 | ||
1438 | spin_lock(&fc_tbl->slot_tbl_lock); | |
1439 | for (i = 0; i < fc_tbl->target_max_slots; i++) | |
1440 | new[i].seq_nr = fc_tbl->slots[i].seq_nr; | |
1441 | old = fc_tbl->slots; | |
1442 | fc_tbl->slots = new; | |
1443 | fc_tbl->max_slots = fc_tbl->target_max_slots; | |
1444 | fc_tbl->target_max_slots = 0; | |
1445 | fc_attrs->max_reqs = fc_tbl->max_slots; | |
1446 | spin_unlock(&fc_tbl->slot_tbl_lock); | |
1447 | ||
1448 | kfree(old); | |
1449 | nfs4_end_drain_session(clp); | |
1450 | return 0; | |
1451 | } | |
1452 | ||
76db6d95 | 1453 | #else /* CONFIG_NFS_V4_1 */ |
c3fad1b1 | 1454 | static int nfs4_reset_session(struct nfs_client *clp) { return 0; } |
5601a00d | 1455 | static int nfs4_end_drain_session(struct nfs_client *clp) { return 0; } |
b9efa1b2 | 1456 | static int nfs4_recall_slot(struct nfs_client *clp) { return 0; } |
76db6d95 AA |
1457 | #endif /* CONFIG_NFS_V4_1 */ |
1458 | ||
78722e9c AA |
1459 | /* Set NFS4CLNT_LEASE_EXPIRED for all v4.0 errors and for recoverable errors |
1460 | * on EXCHANGE_ID for v4.1 | |
1461 | */ | |
1462 | static void nfs4_set_lease_expired(struct nfs_client *clp, int status) | |
1463 | { | |
1464 | if (nfs4_has_session(clp)) { | |
1465 | switch (status) { | |
1466 | case -NFS4ERR_DELAY: | |
1467 | case -NFS4ERR_CLID_INUSE: | |
1468 | case -EAGAIN: | |
1469 | break; | |
1470 | ||
168667c4 TM |
1471 | case -EKEYEXPIRED: |
1472 | nfs4_warn_keyexpired(clp->cl_hostname); | |
78722e9c AA |
1473 | case -NFS4ERR_NOT_SAME: /* FixMe: implement recovery |
1474 | * in nfs4_exchange_id */ | |
1475 | default: | |
1476 | return; | |
1477 | } | |
1478 | } | |
1479 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1480 | } | |
1481 | ||
e005e804 | 1482 | static void nfs4_state_manager(struct nfs_client *clp) |
02860014 | 1483 | { |
02860014 TM |
1484 | int status = 0; |
1485 | ||
02860014 | 1486 | /* Ensure exclusive access to NFSv4 state */ |
f3c76491 | 1487 | for(;;) { |
b79a4a1b TM |
1488 | if (test_and_clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) { |
1489 | /* We're going to have to re-establish a clientid */ | |
1490 | status = nfs4_reclaim_lease(clp); | |
1491 | if (status) { | |
78722e9c | 1492 | nfs4_set_lease_expired(clp, status); |
b6d408ba TM |
1493 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, |
1494 | &clp->cl_state)) | |
b79a4a1b | 1495 | continue; |
76db6d95 AA |
1496 | if (clp->cl_cons_state == |
1497 | NFS_CS_SESSION_INITING) | |
1498 | nfs_mark_client_ready(clp, status); | |
b79a4a1b TM |
1499 | goto out_error; |
1500 | } | |
e598d843 | 1501 | clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); |
7cab89b2 | 1502 | set_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state); |
974cec8c | 1503 | pnfs_destroy_all_layouts(clp); |
e598d843 TM |
1504 | } |
1505 | ||
1506 | if (test_and_clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state)) { | |
1507 | status = nfs4_check_lease(clp); | |
b6d408ba | 1508 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
e598d843 | 1509 | continue; |
b6d408ba TM |
1510 | if (status < 0 && status != -NFS4ERR_CB_PATH_DOWN) |
1511 | goto out_error; | |
b79a4a1b | 1512 | } |
b6d408ba | 1513 | |
c3fad1b1 | 1514 | /* Initialize or reset the session */ |
6df08189 | 1515 | if (test_and_clear_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state) |
7111dc73 | 1516 | && nfs4_has_session(clp)) { |
4d643d1d | 1517 | status = nfs4_reset_session(clp); |
b6d408ba TM |
1518 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
1519 | continue; | |
1520 | if (status < 0) | |
76db6d95 | 1521 | goto out_error; |
76db6d95 | 1522 | } |
b6d408ba | 1523 | |
b79a4a1b | 1524 | /* First recover reboot state... */ |
e345e88a | 1525 | if (test_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) { |
591d71cb | 1526 | status = nfs4_do_reclaim(clp, |
c48f4f35 | 1527 | clp->cl_mvops->reboot_recovery_ops); |
b6d408ba | 1528 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) || |
6df08189 | 1529 | test_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state)) |
c3fad1b1 | 1530 | continue; |
b79a4a1b | 1531 | nfs4_state_end_reclaim_reboot(clp); |
b6d408ba TM |
1532 | if (test_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) |
1533 | continue; | |
1534 | if (status < 0) | |
1535 | goto out_error; | |
02860014 TM |
1536 | } |
1537 | ||
b79a4a1b TM |
1538 | /* Now recover expired state... */ |
1539 | if (test_and_clear_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) { | |
591d71cb | 1540 | status = nfs4_do_reclaim(clp, |
c48f4f35 | 1541 | clp->cl_mvops->nograce_recovery_ops); |
b6d408ba | 1542 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) || |
6df08189 | 1543 | test_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state) || |
b6d408ba TM |
1544 | test_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) |
1545 | continue; | |
1546 | if (status < 0) | |
b79a4a1b | 1547 | goto out_error; |
1da177e4 | 1548 | } |
707fb4b3 | 1549 | |
5601a00d | 1550 | nfs4_end_drain_session(clp); |
707fb4b3 TM |
1551 | if (test_and_clear_bit(NFS4CLNT_DELEGRETURN, &clp->cl_state)) { |
1552 | nfs_client_return_marked_delegations(clp); | |
1553 | continue; | |
1554 | } | |
b9efa1b2 AA |
1555 | /* Recall session slots */ |
1556 | if (test_and_clear_bit(NFS4CLNT_RECALL_SLOT, &clp->cl_state) | |
1557 | && nfs4_has_session(clp)) { | |
1558 | status = nfs4_recall_slot(clp); | |
1559 | if (status < 0) | |
1560 | goto out_error; | |
1561 | continue; | |
1562 | } | |
1563 | ||
e005e804 TM |
1564 | |
1565 | nfs4_clear_state_manager_bit(clp); | |
f3c76491 TM |
1566 | /* Did we race with an attempt to give us more work? */ |
1567 | if (clp->cl_state == 0) | |
1568 | break; | |
1569 | if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) != 0) | |
1570 | break; | |
1da177e4 | 1571 | } |
e005e804 | 1572 | return; |
1da177e4 | 1573 | out_error: |
e005e804 | 1574 | printk(KERN_WARNING "Error: state manager failed on NFSv4 server %s" |
5d8515ca | 1575 | " with error %d\n", clp->cl_hostname, -status); |
5601a00d | 1576 | nfs4_end_drain_session(clp); |
e005e804 TM |
1577 | nfs4_clear_state_manager_bit(clp); |
1578 | } | |
1579 | ||
1580 | static int nfs4_run_state_manager(void *ptr) | |
1581 | { | |
1582 | struct nfs_client *clp = ptr; | |
1583 | ||
1584 | allow_signal(SIGKILL); | |
1585 | nfs4_state_manager(clp); | |
1586 | nfs_put_client(clp); | |
1587 | module_put_and_exit(0); | |
1588 | return 0; | |
1da177e4 LT |
1589 | } |
1590 | ||
1591 | /* | |
1592 | * Local variables: | |
1593 | * c-basic-offset: 8 | |
1594 | * End: | |
1595 | */ |