Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * fs/nfs/nfs4state.c | |
3 | * | |
4 | * Client-side XDR for NFSv4. | |
5 | * | |
6 | * Copyright (c) 2002 The Regents of the University of Michigan. | |
7 | * All rights reserved. | |
8 | * | |
9 | * Kendrick Smith <kmsmith@umich.edu> | |
10 | * | |
11 | * Redistribution and use in source and binary forms, with or without | |
12 | * modification, are permitted provided that the following conditions | |
13 | * are met: | |
14 | * | |
15 | * 1. Redistributions of source code must retain the above copyright | |
16 | * notice, this list of conditions and the following disclaimer. | |
17 | * 2. Redistributions in binary form must reproduce the above copyright | |
18 | * notice, this list of conditions and the following disclaimer in the | |
19 | * documentation and/or other materials provided with the distribution. | |
20 | * 3. Neither the name of the University nor the names of its | |
21 | * contributors may be used to endorse or promote products derived | |
22 | * from this software without specific prior written permission. | |
23 | * | |
24 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
25 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
26 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
27 | * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
28 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
29 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
30 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR | |
31 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
32 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
33 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
34 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
35 | * | |
36 | * Implementation of the NFSv4 state model. For the time being, | |
37 | * this is minimal, but will be made much more complex in a | |
38 | * subsequent patch. | |
39 | */ | |
40 | ||
6f43ddcc | 41 | #include <linux/kernel.h> |
1da177e4 LT |
42 | #include <linux/slab.h> |
43 | #include <linux/smp_lock.h> | |
44 | #include <linux/nfs_fs.h> | |
45 | #include <linux/nfs_idmap.h> | |
5043e900 TM |
46 | #include <linux/kthread.h> |
47 | #include <linux/module.h> | |
9f958ab8 | 48 | #include <linux/random.h> |
1da177e4 LT |
49 | #include <linux/workqueue.h> |
50 | #include <linux/bitops.h> | |
51 | ||
4ce79717 | 52 | #include "nfs4_fs.h" |
1da177e4 LT |
53 | #include "callback.h" |
54 | #include "delegation.h" | |
24c8dbbb | 55 | #include "internal.h" |
1da177e4 LT |
56 | |
57 | #define OPENOWNER_POOL_SIZE 8 | |
58 | ||
4ce79717 | 59 | const nfs4_stateid zero_stateid; |
1da177e4 LT |
60 | |
61 | static LIST_HEAD(nfs4_clientid_list); | |
62 | ||
591d71cb | 63 | int nfs4_init_clientid(struct nfs_client *clp, struct rpc_cred *cred) |
1da177e4 | 64 | { |
bb8b27e5 | 65 | struct nfs4_setclientid_res clid; |
f738f517 CL |
66 | unsigned short port; |
67 | int status; | |
68 | ||
69 | port = nfs_callback_tcpport; | |
70 | if (clp->cl_addr.ss_family == AF_INET6) | |
71 | port = nfs_callback_tcpport6; | |
72 | ||
bb8b27e5 TM |
73 | status = nfs4_proc_setclientid(clp, NFS4_CALLBACK, port, cred, &clid); |
74 | if (status != 0) | |
75 | goto out; | |
76 | status = nfs4_proc_setclientid_confirm(clp, &clid, cred); | |
77 | if (status != 0) | |
78 | goto out; | |
79 | clp->cl_clientid = clid.clientid; | |
80 | nfs4_schedule_state_renewal(clp); | |
81 | out: | |
1da177e4 LT |
82 | return status; |
83 | } | |
84 | ||
a7b72103 | 85 | struct rpc_cred *nfs4_get_machine_cred_locked(struct nfs_client *clp) |
a2b2bb88 TM |
86 | { |
87 | struct rpc_cred *cred = NULL; | |
88 | ||
a2b2bb88 TM |
89 | if (clp->cl_machine_cred != NULL) |
90 | cred = get_rpccred(clp->cl_machine_cred); | |
a2b2bb88 TM |
91 | return cred; |
92 | } | |
93 | ||
94 | static void nfs4_clear_machine_cred(struct nfs_client *clp) | |
95 | { | |
96 | struct rpc_cred *cred; | |
97 | ||
98 | spin_lock(&clp->cl_lock); | |
99 | cred = clp->cl_machine_cred; | |
100 | clp->cl_machine_cred = NULL; | |
101 | spin_unlock(&clp->cl_lock); | |
102 | if (cred != NULL) | |
103 | put_rpccred(cred); | |
104 | } | |
105 | ||
6dc9d57a | 106 | struct rpc_cred *nfs4_get_renew_cred_locked(struct nfs_client *clp) |
b4454fe1 TM |
107 | { |
108 | struct nfs4_state_owner *sp; | |
9f958ab8 | 109 | struct rb_node *pos; |
b4454fe1 TM |
110 | struct rpc_cred *cred = NULL; |
111 | ||
9f958ab8 TM |
112 | for (pos = rb_first(&clp->cl_state_owners); pos != NULL; pos = rb_next(pos)) { |
113 | sp = rb_entry(pos, struct nfs4_state_owner, so_client_node); | |
b4454fe1 TM |
114 | if (list_empty(&sp->so_states)) |
115 | continue; | |
116 | cred = get_rpccred(sp->so_cred); | |
117 | break; | |
118 | } | |
119 | return cred; | |
120 | } | |
121 | ||
b4b82607 AA |
122 | #if defined(CONFIG_NFS_V4_1) |
123 | ||
9430fb6b RL |
124 | static int nfs41_setup_state_renewal(struct nfs_client *clp) |
125 | { | |
126 | int status; | |
127 | struct nfs_fsinfo fsinfo; | |
128 | ||
129 | status = nfs4_proc_get_lease_time(clp, &fsinfo); | |
130 | if (status == 0) { | |
131 | /* Update lease time and schedule renewal */ | |
132 | spin_lock(&clp->cl_lock); | |
133 | clp->cl_lease_time = fsinfo.lease_time * HZ; | |
134 | clp->cl_last_renewal = jiffies; | |
135 | spin_unlock(&clp->cl_lock); | |
136 | ||
137 | nfs4_schedule_state_renewal(clp); | |
138 | } | |
139 | ||
140 | return status; | |
141 | } | |
142 | ||
5601a00d | 143 | static void nfs4_end_drain_session(struct nfs_client *clp) |
9dfdf404 | 144 | { |
5601a00d | 145 | struct nfs4_session *ses = clp->cl_session; |
689cf5c1 AB |
146 | int max_slots; |
147 | ||
a2118c33 TM |
148 | if (ses == NULL) |
149 | return; | |
150 | if (test_and_clear_bit(NFS4_SESSION_DRAINING, &ses->session_state)) { | |
689cf5c1 AB |
151 | spin_lock(&ses->fc_slot_table.slot_tbl_lock); |
152 | max_slots = ses->fc_slot_table.max_slots; | |
153 | while (max_slots--) { | |
154 | struct rpc_task *task; | |
155 | ||
156 | task = rpc_wake_up_next(&ses->fc_slot_table. | |
157 | slot_tbl_waitq); | |
158 | if (!task) | |
159 | break; | |
160 | rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED); | |
161 | } | |
162 | spin_unlock(&ses->fc_slot_table.slot_tbl_lock); | |
163 | } | |
9dfdf404 RL |
164 | } |
165 | ||
5601a00d | 166 | static int nfs4_begin_drain_session(struct nfs_client *clp) |
9dfdf404 | 167 | { |
5601a00d | 168 | struct nfs4_session *ses = clp->cl_session; |
9dfdf404 RL |
169 | struct nfs4_slot_table *tbl = &ses->fc_slot_table; |
170 | ||
171 | spin_lock(&tbl->slot_tbl_lock); | |
a2118c33 | 172 | set_bit(NFS4_SESSION_DRAINING, &ses->session_state); |
9dfdf404 RL |
173 | if (tbl->highest_used_slotid != -1) { |
174 | INIT_COMPLETION(ses->complete); | |
175 | spin_unlock(&tbl->slot_tbl_lock); | |
176 | return wait_for_completion_interruptible(&ses->complete); | |
177 | } | |
178 | spin_unlock(&tbl->slot_tbl_lock); | |
179 | return 0; | |
180 | } | |
181 | ||
4d643d1d AA |
182 | int nfs41_init_clientid(struct nfs_client *clp, struct rpc_cred *cred) |
183 | { | |
184 | int status; | |
185 | ||
38045412 | 186 | nfs4_begin_drain_session(clp); |
4d643d1d | 187 | status = nfs4_proc_exchange_id(clp, cred); |
9430fb6b RL |
188 | if (status != 0) |
189 | goto out; | |
190 | status = nfs4_proc_create_session(clp); | |
191 | if (status != 0) | |
192 | goto out; | |
193 | nfs41_setup_state_renewal(clp); | |
194 | nfs_mark_client_ready(clp, NFS_CS_READY); | |
195 | out: | |
4d643d1d AA |
196 | return status; |
197 | } | |
198 | ||
b4b82607 AA |
199 | struct rpc_cred *nfs4_get_exchange_id_cred(struct nfs_client *clp) |
200 | { | |
201 | struct rpc_cred *cred; | |
202 | ||
203 | spin_lock(&clp->cl_lock); | |
204 | cred = nfs4_get_machine_cred_locked(clp); | |
205 | spin_unlock(&clp->cl_lock); | |
206 | return cred; | |
207 | } | |
208 | ||
209 | #endif /* CONFIG_NFS_V4_1 */ | |
210 | ||
a7b72103 | 211 | struct rpc_cred *nfs4_get_setclientid_cred(struct nfs_client *clp) |
286d7d6a TM |
212 | { |
213 | struct nfs4_state_owner *sp; | |
9f958ab8 | 214 | struct rb_node *pos; |
a2b2bb88 | 215 | struct rpc_cred *cred; |
286d7d6a | 216 | |
6dc9d57a TM |
217 | spin_lock(&clp->cl_lock); |
218 | cred = nfs4_get_machine_cred_locked(clp); | |
a2b2bb88 TM |
219 | if (cred != NULL) |
220 | goto out; | |
9f958ab8 TM |
221 | pos = rb_first(&clp->cl_state_owners); |
222 | if (pos != NULL) { | |
223 | sp = rb_entry(pos, struct nfs4_state_owner, so_client_node); | |
a2b2bb88 | 224 | cred = get_rpccred(sp->so_cred); |
286d7d6a | 225 | } |
a2b2bb88 | 226 | out: |
6dc9d57a | 227 | spin_unlock(&clp->cl_lock); |
a2b2bb88 | 228 | return cred; |
286d7d6a TM |
229 | } |
230 | ||
9f958ab8 TM |
231 | static void nfs_alloc_unique_id(struct rb_root *root, struct nfs_unique_id *new, |
232 | __u64 minval, int maxbits) | |
233 | { | |
234 | struct rb_node **p, *parent; | |
235 | struct nfs_unique_id *pos; | |
236 | __u64 mask = ~0ULL; | |
237 | ||
238 | if (maxbits < 64) | |
239 | mask = (1ULL << maxbits) - 1ULL; | |
240 | ||
241 | /* Ensure distribution is more or less flat */ | |
242 | get_random_bytes(&new->id, sizeof(new->id)); | |
243 | new->id &= mask; | |
244 | if (new->id < minval) | |
245 | new->id += minval; | |
246 | retry: | |
247 | p = &root->rb_node; | |
248 | parent = NULL; | |
249 | ||
250 | while (*p != NULL) { | |
251 | parent = *p; | |
252 | pos = rb_entry(parent, struct nfs_unique_id, rb_node); | |
253 | ||
254 | if (new->id < pos->id) | |
255 | p = &(*p)->rb_left; | |
256 | else if (new->id > pos->id) | |
257 | p = &(*p)->rb_right; | |
258 | else | |
259 | goto id_exists; | |
260 | } | |
261 | rb_link_node(&new->rb_node, parent, p); | |
262 | rb_insert_color(&new->rb_node, root); | |
263 | return; | |
264 | id_exists: | |
265 | for (;;) { | |
266 | new->id++; | |
267 | if (new->id < minval || (new->id & mask) != new->id) { | |
268 | new->id = minval; | |
269 | break; | |
270 | } | |
271 | parent = rb_next(parent); | |
272 | if (parent == NULL) | |
273 | break; | |
274 | pos = rb_entry(parent, struct nfs_unique_id, rb_node); | |
275 | if (new->id < pos->id) | |
276 | break; | |
277 | } | |
278 | goto retry; | |
279 | } | |
280 | ||
281 | static void nfs_free_unique_id(struct rb_root *root, struct nfs_unique_id *id) | |
282 | { | |
283 | rb_erase(&id->rb_node, root); | |
284 | } | |
285 | ||
1da177e4 | 286 | static struct nfs4_state_owner * |
6f2e64d3 | 287 | nfs4_find_state_owner(struct nfs_server *server, struct rpc_cred *cred) |
1da177e4 | 288 | { |
6f2e64d3 | 289 | struct nfs_client *clp = server->nfs_client; |
9f958ab8 TM |
290 | struct rb_node **p = &clp->cl_state_owners.rb_node, |
291 | *parent = NULL; | |
1da177e4 LT |
292 | struct nfs4_state_owner *sp, *res = NULL; |
293 | ||
9f958ab8 TM |
294 | while (*p != NULL) { |
295 | parent = *p; | |
296 | sp = rb_entry(parent, struct nfs4_state_owner, so_client_node); | |
297 | ||
6f2e64d3 TM |
298 | if (server < sp->so_server) { |
299 | p = &parent->rb_left; | |
300 | continue; | |
301 | } | |
302 | if (server > sp->so_server) { | |
303 | p = &parent->rb_right; | |
304 | continue; | |
305 | } | |
9f958ab8 TM |
306 | if (cred < sp->so_cred) |
307 | p = &parent->rb_left; | |
308 | else if (cred > sp->so_cred) | |
309 | p = &parent->rb_right; | |
310 | else { | |
311 | atomic_inc(&sp->so_count); | |
312 | res = sp; | |
313 | break; | |
314 | } | |
1da177e4 LT |
315 | } |
316 | return res; | |
317 | } | |
318 | ||
9f958ab8 TM |
319 | static struct nfs4_state_owner * |
320 | nfs4_insert_state_owner(struct nfs_client *clp, struct nfs4_state_owner *new) | |
321 | { | |
322 | struct rb_node **p = &clp->cl_state_owners.rb_node, | |
323 | *parent = NULL; | |
324 | struct nfs4_state_owner *sp; | |
325 | ||
326 | while (*p != NULL) { | |
327 | parent = *p; | |
328 | sp = rb_entry(parent, struct nfs4_state_owner, so_client_node); | |
329 | ||
6f2e64d3 TM |
330 | if (new->so_server < sp->so_server) { |
331 | p = &parent->rb_left; | |
332 | continue; | |
333 | } | |
334 | if (new->so_server > sp->so_server) { | |
335 | p = &parent->rb_right; | |
336 | continue; | |
337 | } | |
9f958ab8 TM |
338 | if (new->so_cred < sp->so_cred) |
339 | p = &parent->rb_left; | |
340 | else if (new->so_cred > sp->so_cred) | |
341 | p = &parent->rb_right; | |
342 | else { | |
343 | atomic_inc(&sp->so_count); | |
344 | return sp; | |
345 | } | |
346 | } | |
347 | nfs_alloc_unique_id(&clp->cl_openowner_id, &new->so_owner_id, 1, 64); | |
348 | rb_link_node(&new->so_client_node, parent, p); | |
349 | rb_insert_color(&new->so_client_node, &clp->cl_state_owners); | |
350 | return new; | |
351 | } | |
352 | ||
353 | static void | |
354 | nfs4_remove_state_owner(struct nfs_client *clp, struct nfs4_state_owner *sp) | |
355 | { | |
356 | if (!RB_EMPTY_NODE(&sp->so_client_node)) | |
357 | rb_erase(&sp->so_client_node, &clp->cl_state_owners); | |
358 | nfs_free_unique_id(&clp->cl_openowner_id, &sp->so_owner_id); | |
359 | } | |
360 | ||
1da177e4 LT |
361 | /* |
362 | * nfs4_alloc_state_owner(): this is called on the OPEN or CREATE path to | |
363 | * create a new state_owner. | |
364 | * | |
365 | */ | |
366 | static struct nfs4_state_owner * | |
367 | nfs4_alloc_state_owner(void) | |
368 | { | |
369 | struct nfs4_state_owner *sp; | |
370 | ||
8535b2be | 371 | sp = kzalloc(sizeof(*sp),GFP_NOFS); |
1da177e4 LT |
372 | if (!sp) |
373 | return NULL; | |
ec073428 | 374 | spin_lock_init(&sp->so_lock); |
1da177e4 | 375 | INIT_LIST_HEAD(&sp->so_states); |
cee54fc9 TM |
376 | rpc_init_wait_queue(&sp->so_sequence.wait, "Seqid_waitqueue"); |
377 | sp->so_seqid.sequence = &sp->so_sequence; | |
378 | spin_lock_init(&sp->so_sequence.lock); | |
379 | INIT_LIST_HEAD(&sp->so_sequence.list); | |
1da177e4 LT |
380 | atomic_set(&sp->so_count, 1); |
381 | return sp; | |
382 | } | |
383 | ||
1d2e88e7 | 384 | static void |
1da177e4 LT |
385 | nfs4_drop_state_owner(struct nfs4_state_owner *sp) |
386 | { | |
9f958ab8 | 387 | if (!RB_EMPTY_NODE(&sp->so_client_node)) { |
1f0e890d | 388 | struct nfs_client *clp = sp->so_server->nfs_client; |
9f958ab8 TM |
389 | |
390 | spin_lock(&clp->cl_lock); | |
391 | rb_erase(&sp->so_client_node, &clp->cl_state_owners); | |
392 | RB_CLEAR_NODE(&sp->so_client_node); | |
393 | spin_unlock(&clp->cl_lock); | |
394 | } | |
1da177e4 LT |
395 | } |
396 | ||
1da177e4 LT |
397 | struct nfs4_state_owner *nfs4_get_state_owner(struct nfs_server *server, struct rpc_cred *cred) |
398 | { | |
7539bbab | 399 | struct nfs_client *clp = server->nfs_client; |
1da177e4 LT |
400 | struct nfs4_state_owner *sp, *new; |
401 | ||
1da177e4 | 402 | spin_lock(&clp->cl_lock); |
6f2e64d3 | 403 | sp = nfs4_find_state_owner(server, cred); |
1da177e4 | 404 | spin_unlock(&clp->cl_lock); |
1da177e4 LT |
405 | if (sp != NULL) |
406 | return sp; | |
9f958ab8 TM |
407 | new = nfs4_alloc_state_owner(); |
408 | if (new == NULL) | |
409 | return NULL; | |
6f2e64d3 | 410 | new->so_server = server; |
9f958ab8 TM |
411 | new->so_cred = cred; |
412 | spin_lock(&clp->cl_lock); | |
413 | sp = nfs4_insert_state_owner(clp, new); | |
414 | spin_unlock(&clp->cl_lock); | |
415 | if (sp == new) | |
416 | get_rpccred(cred); | |
f6a1cc89 TM |
417 | else { |
418 | rpc_destroy_wait_queue(&new->so_sequence.wait); | |
9f958ab8 | 419 | kfree(new); |
f6a1cc89 | 420 | } |
9f958ab8 | 421 | return sp; |
1da177e4 LT |
422 | } |
423 | ||
1da177e4 LT |
424 | void nfs4_put_state_owner(struct nfs4_state_owner *sp) |
425 | { | |
1f0e890d | 426 | struct nfs_client *clp = sp->so_server->nfs_client; |
1da177e4 LT |
427 | struct rpc_cred *cred = sp->so_cred; |
428 | ||
429 | if (!atomic_dec_and_lock(&sp->so_count, &clp->cl_lock)) | |
430 | return; | |
9f958ab8 | 431 | nfs4_remove_state_owner(clp, sp); |
1da177e4 | 432 | spin_unlock(&clp->cl_lock); |
f6a1cc89 | 433 | rpc_destroy_wait_queue(&sp->so_sequence.wait); |
1da177e4 LT |
434 | put_rpccred(cred); |
435 | kfree(sp); | |
436 | } | |
437 | ||
438 | static struct nfs4_state * | |
439 | nfs4_alloc_open_state(void) | |
440 | { | |
441 | struct nfs4_state *state; | |
442 | ||
8535b2be | 443 | state = kzalloc(sizeof(*state), GFP_NOFS); |
1da177e4 LT |
444 | if (!state) |
445 | return NULL; | |
1da177e4 LT |
446 | atomic_set(&state->count, 1); |
447 | INIT_LIST_HEAD(&state->lock_states); | |
8d0a8a9d | 448 | spin_lock_init(&state->state_lock); |
8bda4e4c | 449 | seqlock_init(&state->seqlock); |
1da177e4 LT |
450 | return state; |
451 | } | |
452 | ||
4cecb76f | 453 | void |
dc0b027d | 454 | nfs4_state_set_mode_locked(struct nfs4_state *state, fmode_t fmode) |
4cecb76f | 455 | { |
dc0b027d | 456 | if (state->state == fmode) |
4cecb76f TM |
457 | return; |
458 | /* NB! List reordering - see the reclaim code for why. */ | |
dc0b027d TM |
459 | if ((fmode & FMODE_WRITE) != (state->state & FMODE_WRITE)) { |
460 | if (fmode & FMODE_WRITE) | |
4cecb76f TM |
461 | list_move(&state->open_states, &state->owner->so_states); |
462 | else | |
463 | list_move_tail(&state->open_states, &state->owner->so_states); | |
464 | } | |
dc0b027d | 465 | state->state = fmode; |
4cecb76f TM |
466 | } |
467 | ||
1da177e4 LT |
468 | static struct nfs4_state * |
469 | __nfs4_find_state_byowner(struct inode *inode, struct nfs4_state_owner *owner) | |
470 | { | |
471 | struct nfs_inode *nfsi = NFS_I(inode); | |
472 | struct nfs4_state *state; | |
473 | ||
474 | list_for_each_entry(state, &nfsi->open_states, inode_states) { | |
1c816efa | 475 | if (state->owner != owner) |
1da177e4 | 476 | continue; |
1c816efa | 477 | if (atomic_inc_not_zero(&state->count)) |
1da177e4 | 478 | return state; |
1da177e4 LT |
479 | } |
480 | return NULL; | |
481 | } | |
482 | ||
1da177e4 LT |
483 | static void |
484 | nfs4_free_open_state(struct nfs4_state *state) | |
485 | { | |
486 | kfree(state); | |
487 | } | |
488 | ||
489 | struct nfs4_state * | |
490 | nfs4_get_open_state(struct inode *inode, struct nfs4_state_owner *owner) | |
491 | { | |
492 | struct nfs4_state *state, *new; | |
493 | struct nfs_inode *nfsi = NFS_I(inode); | |
494 | ||
495 | spin_lock(&inode->i_lock); | |
496 | state = __nfs4_find_state_byowner(inode, owner); | |
497 | spin_unlock(&inode->i_lock); | |
498 | if (state) | |
499 | goto out; | |
500 | new = nfs4_alloc_open_state(); | |
ec073428 | 501 | spin_lock(&owner->so_lock); |
1da177e4 LT |
502 | spin_lock(&inode->i_lock); |
503 | state = __nfs4_find_state_byowner(inode, owner); | |
504 | if (state == NULL && new != NULL) { | |
505 | state = new; | |
1da177e4 LT |
506 | state->owner = owner; |
507 | atomic_inc(&owner->so_count); | |
508 | list_add(&state->inode_states, &nfsi->open_states); | |
509 | state->inode = igrab(inode); | |
510 | spin_unlock(&inode->i_lock); | |
ec073428 TM |
511 | /* Note: The reclaim code dictates that we add stateless |
512 | * and read-only stateids to the end of the list */ | |
513 | list_add_tail(&state->open_states, &owner->so_states); | |
514 | spin_unlock(&owner->so_lock); | |
1da177e4 LT |
515 | } else { |
516 | spin_unlock(&inode->i_lock); | |
ec073428 | 517 | spin_unlock(&owner->so_lock); |
1da177e4 LT |
518 | if (new) |
519 | nfs4_free_open_state(new); | |
520 | } | |
521 | out: | |
522 | return state; | |
523 | } | |
524 | ||
1da177e4 LT |
525 | void nfs4_put_open_state(struct nfs4_state *state) |
526 | { | |
527 | struct inode *inode = state->inode; | |
528 | struct nfs4_state_owner *owner = state->owner; | |
529 | ||
ec073428 | 530 | if (!atomic_dec_and_lock(&state->count, &owner->so_lock)) |
1da177e4 | 531 | return; |
ec073428 | 532 | spin_lock(&inode->i_lock); |
ba683031 | 533 | list_del(&state->inode_states); |
1da177e4 | 534 | list_del(&state->open_states); |
ec073428 TM |
535 | spin_unlock(&inode->i_lock); |
536 | spin_unlock(&owner->so_lock); | |
1da177e4 | 537 | iput(inode); |
1da177e4 LT |
538 | nfs4_free_open_state(state); |
539 | nfs4_put_state_owner(owner); | |
540 | } | |
541 | ||
542 | /* | |
83c9d41e | 543 | * Close the current file. |
1da177e4 | 544 | */ |
8535b2be TM |
545 | static void __nfs4_close(struct path *path, struct nfs4_state *state, |
546 | fmode_t fmode, gfp_t gfp_mask, int wait) | |
1da177e4 | 547 | { |
1da177e4 | 548 | struct nfs4_state_owner *owner = state->owner; |
003707c7 | 549 | int call_close = 0; |
dc0b027d | 550 | fmode_t newstate; |
1da177e4 LT |
551 | |
552 | atomic_inc(&owner->so_count); | |
1da177e4 | 553 | /* Protect against nfs4_find_state() */ |
ec073428 | 554 | spin_lock(&owner->so_lock); |
dc0b027d | 555 | switch (fmode & (FMODE_READ | FMODE_WRITE)) { |
e7616923 TM |
556 | case FMODE_READ: |
557 | state->n_rdonly--; | |
558 | break; | |
559 | case FMODE_WRITE: | |
560 | state->n_wronly--; | |
561 | break; | |
562 | case FMODE_READ|FMODE_WRITE: | |
563 | state->n_rdwr--; | |
564 | } | |
003707c7 | 565 | newstate = FMODE_READ|FMODE_WRITE; |
e7616923 | 566 | if (state->n_rdwr == 0) { |
003707c7 | 567 | if (state->n_rdonly == 0) { |
e7616923 | 568 | newstate &= ~FMODE_READ; |
003707c7 TM |
569 | call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags); |
570 | call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); | |
571 | } | |
572 | if (state->n_wronly == 0) { | |
e7616923 | 573 | newstate &= ~FMODE_WRITE; |
003707c7 TM |
574 | call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags); |
575 | call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); | |
576 | } | |
577 | if (newstate == 0) | |
578 | clear_bit(NFS_DELEGATED_STATE, &state->flags); | |
e7616923 | 579 | } |
003707c7 | 580 | nfs4_state_set_mode_locked(state, newstate); |
ec073428 | 581 | spin_unlock(&owner->so_lock); |
4cecb76f | 582 | |
003707c7 | 583 | if (!call_close) { |
b39e625b TM |
584 | nfs4_put_open_state(state); |
585 | nfs4_put_state_owner(owner); | |
586 | } else | |
8535b2be | 587 | nfs4_do_close(path, state, gfp_mask, wait); |
a49c3c77 TM |
588 | } |
589 | ||
dc0b027d | 590 | void nfs4_close_state(struct path *path, struct nfs4_state *state, fmode_t fmode) |
a49c3c77 | 591 | { |
8535b2be | 592 | __nfs4_close(path, state, fmode, GFP_NOFS, 0); |
a49c3c77 TM |
593 | } |
594 | ||
dc0b027d | 595 | void nfs4_close_sync(struct path *path, struct nfs4_state *state, fmode_t fmode) |
a49c3c77 | 596 | { |
8535b2be | 597 | __nfs4_close(path, state, fmode, GFP_KERNEL, 1); |
1da177e4 LT |
598 | } |
599 | ||
600 | /* | |
601 | * Search the state->lock_states for an existing lock_owner | |
602 | * that is compatible with current->files | |
603 | */ | |
604 | static struct nfs4_lock_state * | |
77041ed9 | 605 | __nfs4_find_lock_state(struct nfs4_state *state, fl_owner_t fl_owner, pid_t fl_pid, unsigned int type) |
1da177e4 LT |
606 | { |
607 | struct nfs4_lock_state *pos; | |
608 | list_for_each_entry(pos, &state->lock_states, ls_locks) { | |
77041ed9 | 609 | if (type != NFS4_ANY_LOCK_TYPE && pos->ls_owner.lo_type != type) |
1da177e4 | 610 | continue; |
77041ed9 TM |
611 | switch (pos->ls_owner.lo_type) { |
612 | case NFS4_POSIX_LOCK_TYPE: | |
613 | if (pos->ls_owner.lo_u.posix_owner != fl_owner) | |
614 | continue; | |
615 | break; | |
616 | case NFS4_FLOCK_LOCK_TYPE: | |
617 | if (pos->ls_owner.lo_u.flock_owner != fl_pid) | |
618 | continue; | |
619 | } | |
1da177e4 LT |
620 | atomic_inc(&pos->ls_count); |
621 | return pos; | |
622 | } | |
623 | return NULL; | |
624 | } | |
625 | ||
1da177e4 LT |
626 | /* |
627 | * Return a compatible lock_state. If no initialized lock_state structure | |
628 | * exists, return an uninitialized one. | |
629 | * | |
1da177e4 | 630 | */ |
77041ed9 | 631 | 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 |
632 | { |
633 | struct nfs4_lock_state *lsp; | |
1f0e890d | 634 | struct nfs_client *clp = state->owner->so_server->nfs_client; |
1da177e4 | 635 | |
8535b2be | 636 | lsp = kzalloc(sizeof(*lsp), GFP_NOFS); |
1da177e4 LT |
637 | if (lsp == NULL) |
638 | return NULL; | |
d0dc3701 TM |
639 | rpc_init_wait_queue(&lsp->ls_sequence.wait, "lock_seqid_waitqueue"); |
640 | spin_lock_init(&lsp->ls_sequence.lock); | |
641 | INIT_LIST_HEAD(&lsp->ls_sequence.list); | |
642 | lsp->ls_seqid.sequence = &lsp->ls_sequence; | |
1da177e4 | 643 | atomic_set(&lsp->ls_count, 1); |
b64aec8d | 644 | lsp->ls_state = state; |
77041ed9 TM |
645 | lsp->ls_owner.lo_type = type; |
646 | switch (lsp->ls_owner.lo_type) { | |
647 | case NFS4_FLOCK_LOCK_TYPE: | |
648 | lsp->ls_owner.lo_u.flock_owner = fl_pid; | |
649 | break; | |
650 | case NFS4_POSIX_LOCK_TYPE: | |
651 | lsp->ls_owner.lo_u.posix_owner = fl_owner; | |
652 | break; | |
653 | default: | |
654 | kfree(lsp); | |
655 | return NULL; | |
656 | } | |
1da177e4 | 657 | spin_lock(&clp->cl_lock); |
9f958ab8 | 658 | nfs_alloc_unique_id(&clp->cl_lockowner_id, &lsp->ls_id, 1, 64); |
1da177e4 | 659 | spin_unlock(&clp->cl_lock); |
8d0a8a9d | 660 | INIT_LIST_HEAD(&lsp->ls_locks); |
1da177e4 LT |
661 | return lsp; |
662 | } | |
663 | ||
9f958ab8 TM |
664 | static void nfs4_free_lock_state(struct nfs4_lock_state *lsp) |
665 | { | |
1f0e890d | 666 | struct nfs_client *clp = lsp->ls_state->owner->so_server->nfs_client; |
9f958ab8 TM |
667 | |
668 | spin_lock(&clp->cl_lock); | |
669 | nfs_free_unique_id(&clp->cl_lockowner_id, &lsp->ls_id); | |
670 | spin_unlock(&clp->cl_lock); | |
f6a1cc89 | 671 | rpc_destroy_wait_queue(&lsp->ls_sequence.wait); |
9f958ab8 TM |
672 | kfree(lsp); |
673 | } | |
674 | ||
1da177e4 LT |
675 | /* |
676 | * Return a compatible lock_state. If no initialized lock_state structure | |
677 | * exists, return an uninitialized one. | |
678 | * | |
1da177e4 | 679 | */ |
77041ed9 | 680 | static struct nfs4_lock_state *nfs4_get_lock_state(struct nfs4_state *state, fl_owner_t owner, pid_t pid, unsigned int type) |
1da177e4 | 681 | { |
8d0a8a9d | 682 | struct nfs4_lock_state *lsp, *new = NULL; |
1da177e4 | 683 | |
8d0a8a9d TM |
684 | for(;;) { |
685 | spin_lock(&state->state_lock); | |
77041ed9 | 686 | lsp = __nfs4_find_lock_state(state, owner, pid, type); |
8d0a8a9d TM |
687 | if (lsp != NULL) |
688 | break; | |
689 | if (new != NULL) { | |
8d0a8a9d TM |
690 | list_add(&new->ls_locks, &state->lock_states); |
691 | set_bit(LK_STATE_IN_USE, &state->flags); | |
692 | lsp = new; | |
693 | new = NULL; | |
694 | break; | |
695 | } | |
696 | spin_unlock(&state->state_lock); | |
77041ed9 | 697 | new = nfs4_alloc_lock_state(state, owner, pid, type); |
8d0a8a9d TM |
698 | if (new == NULL) |
699 | return NULL; | |
700 | } | |
701 | spin_unlock(&state->state_lock); | |
9f958ab8 TM |
702 | if (new != NULL) |
703 | nfs4_free_lock_state(new); | |
1da177e4 LT |
704 | return lsp; |
705 | } | |
706 | ||
707 | /* | |
8d0a8a9d TM |
708 | * Release reference to lock_state, and free it if we see that |
709 | * it is no longer in use | |
1da177e4 | 710 | */ |
faf5f49c | 711 | void nfs4_put_lock_state(struct nfs4_lock_state *lsp) |
1da177e4 | 712 | { |
8d0a8a9d | 713 | struct nfs4_state *state; |
1da177e4 | 714 | |
8d0a8a9d TM |
715 | if (lsp == NULL) |
716 | return; | |
717 | state = lsp->ls_state; | |
718 | if (!atomic_dec_and_lock(&lsp->ls_count, &state->state_lock)) | |
719 | return; | |
720 | list_del(&lsp->ls_locks); | |
721 | if (list_empty(&state->lock_states)) | |
722 | clear_bit(LK_STATE_IN_USE, &state->flags); | |
723 | spin_unlock(&state->state_lock); | |
d3c7b7cc TM |
724 | if (lsp->ls_flags & NFS_LOCK_INITIALIZED) |
725 | nfs4_release_lockowner(lsp); | |
9f958ab8 | 726 | nfs4_free_lock_state(lsp); |
1da177e4 LT |
727 | } |
728 | ||
8d0a8a9d | 729 | static void nfs4_fl_copy_lock(struct file_lock *dst, struct file_lock *src) |
1da177e4 | 730 | { |
8d0a8a9d | 731 | struct nfs4_lock_state *lsp = src->fl_u.nfs4_fl.owner; |
1da177e4 | 732 | |
8d0a8a9d TM |
733 | dst->fl_u.nfs4_fl.owner = lsp; |
734 | atomic_inc(&lsp->ls_count); | |
735 | } | |
1da177e4 | 736 | |
8d0a8a9d | 737 | static void nfs4_fl_release_lock(struct file_lock *fl) |
1da177e4 | 738 | { |
8d0a8a9d | 739 | nfs4_put_lock_state(fl->fl_u.nfs4_fl.owner); |
1da177e4 LT |
740 | } |
741 | ||
6aed6285 | 742 | static const struct file_lock_operations nfs4_fl_lock_ops = { |
8d0a8a9d TM |
743 | .fl_copy_lock = nfs4_fl_copy_lock, |
744 | .fl_release_private = nfs4_fl_release_lock, | |
745 | }; | |
746 | ||
747 | int nfs4_set_lock_state(struct nfs4_state *state, struct file_lock *fl) | |
1da177e4 | 748 | { |
8d0a8a9d TM |
749 | struct nfs4_lock_state *lsp; |
750 | ||
751 | if (fl->fl_ops != NULL) | |
752 | return 0; | |
77041ed9 TM |
753 | if (fl->fl_flags & FL_POSIX) |
754 | lsp = nfs4_get_lock_state(state, fl->fl_owner, 0, NFS4_POSIX_LOCK_TYPE); | |
755 | else if (fl->fl_flags & FL_FLOCK) | |
756 | lsp = nfs4_get_lock_state(state, 0, fl->fl_pid, NFS4_FLOCK_LOCK_TYPE); | |
757 | else | |
758 | return -EINVAL; | |
8d0a8a9d TM |
759 | if (lsp == NULL) |
760 | return -ENOMEM; | |
761 | fl->fl_u.nfs4_fl.owner = lsp; | |
762 | fl->fl_ops = &nfs4_fl_lock_ops; | |
763 | return 0; | |
1da177e4 LT |
764 | } |
765 | ||
8d0a8a9d TM |
766 | /* |
767 | * Byte-range lock aware utility to initialize the stateid of read/write | |
768 | * requests. | |
1da177e4 | 769 | */ |
77041ed9 | 770 | void nfs4_copy_stateid(nfs4_stateid *dst, struct nfs4_state *state, fl_owner_t fl_owner, pid_t fl_pid) |
1da177e4 | 771 | { |
8d0a8a9d | 772 | struct nfs4_lock_state *lsp; |
8bda4e4c | 773 | int seq; |
1da177e4 | 774 | |
8bda4e4c TM |
775 | do { |
776 | seq = read_seqbegin(&state->seqlock); | |
777 | memcpy(dst, &state->stateid, sizeof(*dst)); | |
778 | } while (read_seqretry(&state->seqlock, seq)); | |
8d0a8a9d TM |
779 | if (test_bit(LK_STATE_IN_USE, &state->flags) == 0) |
780 | return; | |
1da177e4 | 781 | |
8d0a8a9d | 782 | spin_lock(&state->state_lock); |
77041ed9 | 783 | lsp = __nfs4_find_lock_state(state, fl_owner, fl_pid, NFS4_ANY_LOCK_TYPE); |
8d0a8a9d TM |
784 | if (lsp != NULL && (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0) |
785 | memcpy(dst, &lsp->ls_stateid, sizeof(*dst)); | |
786 | spin_unlock(&state->state_lock); | |
1da177e4 LT |
787 | nfs4_put_lock_state(lsp); |
788 | } | |
789 | ||
8535b2be | 790 | struct nfs_seqid *nfs_alloc_seqid(struct nfs_seqid_counter *counter, gfp_t gfp_mask) |
cee54fc9 | 791 | { |
cee54fc9 TM |
792 | struct nfs_seqid *new; |
793 | ||
8535b2be | 794 | new = kmalloc(sizeof(*new), gfp_mask); |
cee54fc9 TM |
795 | if (new != NULL) { |
796 | new->sequence = counter; | |
2f74c0a0 | 797 | INIT_LIST_HEAD(&new->list); |
cee54fc9 TM |
798 | } |
799 | return new; | |
800 | } | |
801 | ||
72211dbe | 802 | void nfs_release_seqid(struct nfs_seqid *seqid) |
1da177e4 | 803 | { |
2f74c0a0 TM |
804 | if (!list_empty(&seqid->list)) { |
805 | struct rpc_sequence *sequence = seqid->sequence->sequence; | |
cee54fc9 | 806 | |
2f74c0a0 | 807 | spin_lock(&sequence->lock); |
72211dbe | 808 | list_del_init(&seqid->list); |
2f74c0a0 TM |
809 | spin_unlock(&sequence->lock); |
810 | rpc_wake_up(&sequence->wait); | |
811 | } | |
72211dbe TM |
812 | } |
813 | ||
814 | void nfs_free_seqid(struct nfs_seqid *seqid) | |
815 | { | |
816 | nfs_release_seqid(seqid); | |
cee54fc9 | 817 | kfree(seqid); |
1da177e4 LT |
818 | } |
819 | ||
820 | /* | |
cee54fc9 TM |
821 | * Increment the seqid if the OPEN/OPEN_DOWNGRADE/CLOSE succeeded, or |
822 | * failed with a seqid incrementing error - | |
823 | * see comments nfs_fs.h:seqid_mutating_error() | |
824 | */ | |
88d90939 | 825 | static void nfs_increment_seqid(int status, struct nfs_seqid *seqid) |
cee54fc9 | 826 | { |
2f74c0a0 | 827 | BUG_ON(list_first_entry(&seqid->sequence->sequence->list, struct nfs_seqid, list) != seqid); |
cee54fc9 TM |
828 | switch (status) { |
829 | case 0: | |
830 | break; | |
831 | case -NFS4ERR_BAD_SEQID: | |
6f43ddcc TM |
832 | if (seqid->sequence->flags & NFS_SEQID_CONFIRMED) |
833 | return; | |
834 | printk(KERN_WARNING "NFS: v4 server returned a bad" | |
497799e7 DM |
835 | " sequence-id error on an" |
836 | " unconfirmed sequence %p!\n", | |
6f43ddcc | 837 | seqid->sequence); |
cee54fc9 TM |
838 | case -NFS4ERR_STALE_CLIENTID: |
839 | case -NFS4ERR_STALE_STATEID: | |
840 | case -NFS4ERR_BAD_STATEID: | |
841 | case -NFS4ERR_BADXDR: | |
842 | case -NFS4ERR_RESOURCE: | |
843 | case -NFS4ERR_NOFILEHANDLE: | |
844 | /* Non-seqid mutating errors */ | |
845 | return; | |
846 | }; | |
847 | /* | |
848 | * Note: no locking needed as we are guaranteed to be first | |
849 | * on the sequence list | |
850 | */ | |
851 | seqid->sequence->counter++; | |
852 | } | |
853 | ||
854 | void nfs_increment_open_seqid(int status, struct nfs_seqid *seqid) | |
855 | { | |
34dc1ad7 BH |
856 | struct nfs4_state_owner *sp = container_of(seqid->sequence, |
857 | struct nfs4_state_owner, so_seqid); | |
858 | struct nfs_server *server = sp->so_server; | |
859 | ||
860 | if (status == -NFS4ERR_BAD_SEQID) | |
1da177e4 | 861 | nfs4_drop_state_owner(sp); |
34dc1ad7 BH |
862 | if (!nfs4_has_session(server->nfs_client)) |
863 | nfs_increment_seqid(status, seqid); | |
cee54fc9 TM |
864 | } |
865 | ||
866 | /* | |
cee54fc9 TM |
867 | * Increment the seqid if the LOCK/LOCKU succeeded, or |
868 | * failed with a seqid incrementing error - | |
869 | * see comments nfs_fs.h:seqid_mutating_error() | |
870 | */ | |
871 | void nfs_increment_lock_seqid(int status, struct nfs_seqid *seqid) | |
872 | { | |
88d90939 | 873 | nfs_increment_seqid(status, seqid); |
cee54fc9 TM |
874 | } |
875 | ||
876 | int nfs_wait_on_sequence(struct nfs_seqid *seqid, struct rpc_task *task) | |
877 | { | |
878 | struct rpc_sequence *sequence = seqid->sequence->sequence; | |
879 | int status = 0; | |
880 | ||
881 | spin_lock(&sequence->lock); | |
2f74c0a0 TM |
882 | if (list_empty(&seqid->list)) |
883 | list_add_tail(&seqid->list, &sequence->list); | |
884 | if (list_first_entry(&sequence->list, struct nfs_seqid, list) == seqid) | |
885 | goto unlock; | |
5d00837b | 886 | rpc_sleep_on(&sequence->wait, task, NULL); |
2f74c0a0 TM |
887 | status = -EAGAIN; |
888 | unlock: | |
cee54fc9 TM |
889 | spin_unlock(&sequence->lock); |
890 | return status; | |
1da177e4 LT |
891 | } |
892 | ||
e005e804 | 893 | static int nfs4_run_state_manager(void *); |
1da177e4 | 894 | |
e005e804 | 895 | static void nfs4_clear_state_manager_bit(struct nfs_client *clp) |
433fbe4c TM |
896 | { |
897 | smp_mb__before_clear_bit(); | |
e005e804 | 898 | clear_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state); |
433fbe4c | 899 | smp_mb__after_clear_bit(); |
e005e804 | 900 | wake_up_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING); |
433fbe4c TM |
901 | rpc_wake_up(&clp->cl_rpcwaitq); |
902 | } | |
903 | ||
1da177e4 | 904 | /* |
e005e804 | 905 | * Schedule the nfs_client asynchronous state management routine |
1da177e4 | 906 | */ |
b0d3ded1 | 907 | void nfs4_schedule_state_manager(struct nfs_client *clp) |
1da177e4 | 908 | { |
5043e900 | 909 | struct task_struct *task; |
1da177e4 | 910 | |
e005e804 TM |
911 | if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) != 0) |
912 | return; | |
5043e900 TM |
913 | __module_get(THIS_MODULE); |
914 | atomic_inc(&clp->cl_count); | |
e005e804 | 915 | task = kthread_run(nfs4_run_state_manager, clp, "%s-manager", |
5d8515ca CL |
916 | rpc_peeraddr2str(clp->cl_rpcclient, |
917 | RPC_DISPLAY_ADDR)); | |
5043e900 TM |
918 | if (!IS_ERR(task)) |
919 | return; | |
e005e804 | 920 | nfs4_clear_state_manager_bit(clp); |
24c8dbbb | 921 | nfs_put_client(clp); |
5043e900 | 922 | module_put(THIS_MODULE); |
1da177e4 LT |
923 | } |
924 | ||
925 | /* | |
926 | * Schedule a state recovery attempt | |
927 | */ | |
adfa6f98 | 928 | void nfs4_schedule_state_recovery(struct nfs_client *clp) |
1da177e4 LT |
929 | { |
930 | if (!clp) | |
931 | return; | |
e598d843 TM |
932 | if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
933 | set_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); | |
e005e804 | 934 | nfs4_schedule_state_manager(clp); |
1da177e4 LT |
935 | } |
936 | ||
a2c0b9e2 | 937 | int nfs4_state_mark_reclaim_reboot(struct nfs_client *clp, struct nfs4_state *state) |
b79a4a1b TM |
938 | { |
939 | ||
940 | set_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); | |
941 | /* Don't recover state that expired before the reboot */ | |
942 | if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) { | |
943 | clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); | |
944 | return 0; | |
945 | } | |
7eff03ae | 946 | set_bit(NFS_OWNER_RECLAIM_REBOOT, &state->owner->so_flags); |
b79a4a1b TM |
947 | set_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state); |
948 | return 1; | |
949 | } | |
950 | ||
9e33bed5 | 951 | int nfs4_state_mark_reclaim_nograce(struct nfs_client *clp, struct nfs4_state *state) |
b79a4a1b TM |
952 | { |
953 | set_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags); | |
954 | clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); | |
7eff03ae | 955 | set_bit(NFS_OWNER_RECLAIM_NOGRACE, &state->owner->so_flags); |
b79a4a1b TM |
956 | set_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state); |
957 | return 1; | |
958 | } | |
959 | ||
02860014 | 960 | static int nfs4_reclaim_locks(struct nfs4_state *state, const struct nfs4_state_recovery_ops *ops) |
1da177e4 LT |
961 | { |
962 | struct inode *inode = state->inode; | |
19e03c57 | 963 | struct nfs_inode *nfsi = NFS_I(inode); |
1da177e4 LT |
964 | struct file_lock *fl; |
965 | int status = 0; | |
966 | ||
3f09df70 TM |
967 | if (inode->i_flock == NULL) |
968 | return 0; | |
969 | ||
970 | /* Guard against delegation returns and new lock/unlock calls */ | |
19e03c57 | 971 | down_write(&nfsi->rwsem); |
3f09df70 TM |
972 | /* Protect inode->i_flock using the BKL */ |
973 | lock_kernel(); | |
90dc7d27 | 974 | for (fl = inode->i_flock; fl != NULL; fl = fl->fl_next) { |
43b2a33a | 975 | if (!(fl->fl_flags & (FL_POSIX|FL_FLOCK))) |
1da177e4 | 976 | continue; |
cd3758e3 | 977 | if (nfs_file_open_context(fl->fl_file)->state != state) |
1da177e4 | 978 | continue; |
3f09df70 | 979 | unlock_kernel(); |
1da177e4 | 980 | status = ops->recover_lock(state, fl); |
1da177e4 | 981 | switch (status) { |
965b5d67 TM |
982 | case 0: |
983 | break; | |
984 | case -ESTALE: | |
985 | case -NFS4ERR_ADMIN_REVOKED: | |
986 | case -NFS4ERR_STALE_STATEID: | |
987 | case -NFS4ERR_BAD_STATEID: | |
988 | case -NFS4ERR_EXPIRED: | |
989 | case -NFS4ERR_NO_GRACE: | |
990 | case -NFS4ERR_STALE_CLIENTID: | |
9c4c761a TM |
991 | case -NFS4ERR_BADSESSION: |
992 | case -NFS4ERR_BADSLOT: | |
993 | case -NFS4ERR_BAD_HIGH_SLOT: | |
994 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
965b5d67 | 995 | goto out; |
1da177e4 LT |
996 | default: |
997 | printk(KERN_ERR "%s: unhandled error %d. Zeroing state\n", | |
3110ff80 | 998 | __func__, status); |
965b5d67 TM |
999 | case -ENOMEM: |
1000 | case -NFS4ERR_DENIED: | |
1da177e4 LT |
1001 | case -NFS4ERR_RECLAIM_BAD: |
1002 | case -NFS4ERR_RECLAIM_CONFLICT: | |
43b2a33a | 1003 | /* kill_proc(fl->fl_pid, SIGLOST, 1); */ |
965b5d67 | 1004 | status = 0; |
1da177e4 | 1005 | } |
3f09df70 | 1006 | lock_kernel(); |
1da177e4 | 1007 | } |
3f09df70 | 1008 | unlock_kernel(); |
965b5d67 | 1009 | out: |
19e03c57 | 1010 | up_write(&nfsi->rwsem); |
1da177e4 LT |
1011 | return status; |
1012 | } | |
1013 | ||
02860014 | 1014 | static int nfs4_reclaim_open_state(struct nfs4_state_owner *sp, const struct nfs4_state_recovery_ops *ops) |
1da177e4 LT |
1015 | { |
1016 | struct nfs4_state *state; | |
1017 | struct nfs4_lock_state *lock; | |
1018 | int status = 0; | |
1019 | ||
1020 | /* Note: we rely on the sp->so_states list being ordered | |
1021 | * so that we always reclaim open(O_RDWR) and/or open(O_WRITE) | |
1022 | * states first. | |
1023 | * This is needed to ensure that the server won't give us any | |
1024 | * read delegations that we have to return if, say, we are | |
1025 | * recovering after a network partition or a reboot from a | |
1026 | * server that doesn't support a grace period. | |
1027 | */ | |
fe1d8195 TM |
1028 | restart: |
1029 | spin_lock(&sp->so_lock); | |
1da177e4 | 1030 | list_for_each_entry(state, &sp->so_states, open_states) { |
b79a4a1b TM |
1031 | if (!test_and_clear_bit(ops->state_flag_bit, &state->flags)) |
1032 | continue; | |
1da177e4 LT |
1033 | if (state->state == 0) |
1034 | continue; | |
fe1d8195 TM |
1035 | atomic_inc(&state->count); |
1036 | spin_unlock(&sp->so_lock); | |
1da177e4 | 1037 | status = ops->recover_open(sp, state); |
1da177e4 | 1038 | if (status >= 0) { |
02860014 TM |
1039 | status = nfs4_reclaim_locks(state, ops); |
1040 | if (status >= 0) { | |
1041 | list_for_each_entry(lock, &state->lock_states, ls_locks) { | |
1042 | if (!(lock->ls_flags & NFS_LOCK_INITIALIZED)) | |
1043 | printk("%s: Lock reclaim failed!\n", | |
3110ff80 | 1044 | __func__); |
02860014 | 1045 | } |
fe1d8195 TM |
1046 | nfs4_put_open_state(state); |
1047 | goto restart; | |
1da177e4 | 1048 | } |
1da177e4 LT |
1049 | } |
1050 | switch (status) { | |
1051 | default: | |
1052 | printk(KERN_ERR "%s: unhandled error %d. Zeroing state\n", | |
3110ff80 | 1053 | __func__, status); |
1da177e4 | 1054 | case -ENOENT: |
965b5d67 | 1055 | case -ENOMEM: |
b79a4a1b | 1056 | case -ESTALE: |
1da177e4 LT |
1057 | /* |
1058 | * Open state on this file cannot be recovered | |
1059 | * All we can do is revert to using the zero stateid. | |
1060 | */ | |
1061 | memset(state->stateid.data, 0, | |
1062 | sizeof(state->stateid.data)); | |
1063 | /* Mark the file as being 'closed' */ | |
1064 | state->state = 0; | |
1065 | break; | |
168667c4 TM |
1066 | case -EKEYEXPIRED: |
1067 | /* | |
1068 | * User RPCSEC_GSS context has expired. | |
1069 | * We cannot recover this stateid now, so | |
1070 | * skip it and allow recovery thread to | |
1071 | * proceed. | |
1072 | */ | |
1073 | break; | |
965b5d67 TM |
1074 | case -NFS4ERR_ADMIN_REVOKED: |
1075 | case -NFS4ERR_STALE_STATEID: | |
1076 | case -NFS4ERR_BAD_STATEID: | |
b79a4a1b TM |
1077 | case -NFS4ERR_RECLAIM_BAD: |
1078 | case -NFS4ERR_RECLAIM_CONFLICT: | |
1f0e890d | 1079 | nfs4_state_mark_reclaim_nograce(sp->so_server->nfs_client, state); |
b79a4a1b | 1080 | break; |
1da177e4 LT |
1081 | case -NFS4ERR_EXPIRED: |
1082 | case -NFS4ERR_NO_GRACE: | |
1f0e890d | 1083 | nfs4_state_mark_reclaim_nograce(sp->so_server->nfs_client, state); |
1da177e4 | 1084 | case -NFS4ERR_STALE_CLIENTID: |
9c4c761a TM |
1085 | case -NFS4ERR_BADSESSION: |
1086 | case -NFS4ERR_BADSLOT: | |
1087 | case -NFS4ERR_BAD_HIGH_SLOT: | |
1088 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
1da177e4 LT |
1089 | goto out_err; |
1090 | } | |
fe1d8195 TM |
1091 | nfs4_put_open_state(state); |
1092 | goto restart; | |
1da177e4 | 1093 | } |
fe1d8195 | 1094 | spin_unlock(&sp->so_lock); |
1da177e4 LT |
1095 | return 0; |
1096 | out_err: | |
fe1d8195 | 1097 | nfs4_put_open_state(state); |
1da177e4 LT |
1098 | return status; |
1099 | } | |
1100 | ||
b79a4a1b TM |
1101 | static void nfs4_clear_open_state(struct nfs4_state *state) |
1102 | { | |
1103 | struct nfs4_lock_state *lock; | |
1104 | ||
1105 | clear_bit(NFS_DELEGATED_STATE, &state->flags); | |
1106 | clear_bit(NFS_O_RDONLY_STATE, &state->flags); | |
1107 | clear_bit(NFS_O_WRONLY_STATE, &state->flags); | |
1108 | clear_bit(NFS_O_RDWR_STATE, &state->flags); | |
1109 | list_for_each_entry(lock, &state->lock_states, ls_locks) { | |
b79a4a1b TM |
1110 | lock->ls_seqid.flags = 0; |
1111 | lock->ls_flags &= ~NFS_LOCK_INITIALIZED; | |
1112 | } | |
1113 | } | |
1114 | ||
1115 | static void nfs4_state_mark_reclaim_helper(struct nfs_client *clp, int (*mark_reclaim)(struct nfs_client *clp, struct nfs4_state *state)) | |
cee54fc9 TM |
1116 | { |
1117 | struct nfs4_state_owner *sp; | |
9f958ab8 | 1118 | struct rb_node *pos; |
cee54fc9 | 1119 | struct nfs4_state *state; |
cee54fc9 TM |
1120 | |
1121 | /* Reset all sequence ids to zero */ | |
9f958ab8 TM |
1122 | for (pos = rb_first(&clp->cl_state_owners); pos != NULL; pos = rb_next(pos)) { |
1123 | sp = rb_entry(pos, struct nfs4_state_owner, so_client_node); | |
cee54fc9 | 1124 | sp->so_seqid.flags = 0; |
ec073428 | 1125 | spin_lock(&sp->so_lock); |
cee54fc9 | 1126 | list_for_each_entry(state, &sp->so_states, open_states) { |
b79a4a1b TM |
1127 | if (mark_reclaim(clp, state)) |
1128 | nfs4_clear_open_state(state); | |
cee54fc9 | 1129 | } |
ec073428 | 1130 | spin_unlock(&sp->so_lock); |
cee54fc9 TM |
1131 | } |
1132 | } | |
1133 | ||
b79a4a1b TM |
1134 | static void nfs4_state_start_reclaim_reboot(struct nfs_client *clp) |
1135 | { | |
1136 | /* Mark all delegations for reclaim */ | |
1137 | nfs_delegation_mark_reclaim(clp); | |
1138 | nfs4_state_mark_reclaim_helper(clp, nfs4_state_mark_reclaim_reboot); | |
1139 | } | |
1140 | ||
fce5c838 RL |
1141 | static void nfs4_reclaim_complete(struct nfs_client *clp, |
1142 | const struct nfs4_state_recovery_ops *ops) | |
1143 | { | |
1144 | /* Notify the server we're done reclaiming our state */ | |
1145 | if (ops->reclaim_complete) | |
1146 | (void)ops->reclaim_complete(clp); | |
1147 | } | |
1148 | ||
6eaa6149 | 1149 | static int nfs4_state_clear_reclaim_reboot(struct nfs_client *clp) |
b79a4a1b TM |
1150 | { |
1151 | struct nfs4_state_owner *sp; | |
1152 | struct rb_node *pos; | |
1153 | struct nfs4_state *state; | |
1154 | ||
1155 | if (!test_and_clear_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) | |
6eaa6149 | 1156 | return 0; |
7cab89b2 | 1157 | |
b79a4a1b TM |
1158 | for (pos = rb_first(&clp->cl_state_owners); pos != NULL; pos = rb_next(pos)) { |
1159 | sp = rb_entry(pos, struct nfs4_state_owner, so_client_node); | |
1160 | spin_lock(&sp->so_lock); | |
1161 | list_for_each_entry(state, &sp->so_states, open_states) { | |
1162 | if (!test_and_clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags)) | |
1163 | continue; | |
1164 | nfs4_state_mark_reclaim_nograce(clp, state); | |
1165 | } | |
1166 | spin_unlock(&sp->so_lock); | |
1167 | } | |
1168 | ||
1169 | nfs_delegation_reap_unclaimed(clp); | |
6eaa6149 TM |
1170 | return 1; |
1171 | } | |
1172 | ||
1173 | static void nfs4_state_end_reclaim_reboot(struct nfs_client *clp) | |
1174 | { | |
1175 | if (!nfs4_state_clear_reclaim_reboot(clp)) | |
1176 | return; | |
1177 | nfs4_reclaim_complete(clp, clp->cl_mvops->reboot_recovery_ops); | |
b79a4a1b TM |
1178 | } |
1179 | ||
1180 | static void nfs_delegation_clear_all(struct nfs_client *clp) | |
1181 | { | |
1182 | nfs_delegation_mark_reclaim(clp); | |
1183 | nfs_delegation_reap_unclaimed(clp); | |
1184 | } | |
1185 | ||
1186 | static void nfs4_state_start_reclaim_nograce(struct nfs_client *clp) | |
1187 | { | |
1188 | nfs_delegation_clear_all(clp); | |
1189 | nfs4_state_mark_reclaim_helper(clp, nfs4_state_mark_reclaim_nograce); | |
1190 | } | |
1191 | ||
168667c4 TM |
1192 | static void nfs4_warn_keyexpired(const char *s) |
1193 | { | |
1194 | printk_ratelimited(KERN_WARNING "Error: state manager" | |
1195 | " encountered RPCSEC_GSS session" | |
1196 | " expired against NFSv4 server %s.\n", | |
1197 | s); | |
1198 | } | |
1199 | ||
4f7cdf18 | 1200 | static int nfs4_recovery_handle_error(struct nfs_client *clp, int error) |
e598d843 TM |
1201 | { |
1202 | switch (error) { | |
1203 | case -NFS4ERR_CB_PATH_DOWN: | |
707fb4b3 | 1204 | nfs_handle_cb_pathdown(clp); |
4f7cdf18 | 1205 | return 0; |
c8b7ae3d TM |
1206 | case -NFS4ERR_NO_GRACE: |
1207 | nfs4_state_end_reclaim_reboot(clp); | |
1208 | return 0; | |
e598d843 TM |
1209 | case -NFS4ERR_STALE_CLIENTID: |
1210 | case -NFS4ERR_LEASE_MOVED: | |
1211 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
6eaa6149 | 1212 | nfs4_state_clear_reclaim_reboot(clp); |
e598d843 TM |
1213 | nfs4_state_start_reclaim_reboot(clp); |
1214 | break; | |
1215 | case -NFS4ERR_EXPIRED: | |
1216 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1217 | nfs4_state_start_reclaim_nograce(clp); | |
8ba9bf8e | 1218 | break; |
c3fad1b1 AA |
1219 | case -NFS4ERR_BADSESSION: |
1220 | case -NFS4ERR_BADSLOT: | |
1221 | case -NFS4ERR_BAD_HIGH_SLOT: | |
1222 | case -NFS4ERR_DEADSESSION: | |
1223 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
1224 | case -NFS4ERR_SEQ_FALSE_RETRY: | |
1225 | case -NFS4ERR_SEQ_MISORDERED: | |
6df08189 | 1226 | set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); |
0b9e2d41 AA |
1227 | /* Zero session reset errors */ |
1228 | return 0; | |
168667c4 TM |
1229 | case -EKEYEXPIRED: |
1230 | /* Nothing we can do */ | |
1231 | nfs4_warn_keyexpired(clp->cl_hostname); | |
1232 | return 0; | |
e598d843 | 1233 | } |
4f7cdf18 | 1234 | return error; |
e598d843 TM |
1235 | } |
1236 | ||
02860014 | 1237 | static int nfs4_do_reclaim(struct nfs_client *clp, const struct nfs4_state_recovery_ops *ops) |
1da177e4 | 1238 | { |
9f958ab8 | 1239 | struct rb_node *pos; |
1da177e4 LT |
1240 | int status = 0; |
1241 | ||
7eff03ae TM |
1242 | restart: |
1243 | spin_lock(&clp->cl_lock); | |
02860014 TM |
1244 | for (pos = rb_first(&clp->cl_state_owners); pos != NULL; pos = rb_next(pos)) { |
1245 | struct nfs4_state_owner *sp = rb_entry(pos, struct nfs4_state_owner, so_client_node); | |
7eff03ae TM |
1246 | if (!test_and_clear_bit(ops->owner_flag_bit, &sp->so_flags)) |
1247 | continue; | |
1248 | atomic_inc(&sp->so_count); | |
1249 | spin_unlock(&clp->cl_lock); | |
02860014 | 1250 | status = nfs4_reclaim_open_state(sp, ops); |
7eff03ae TM |
1251 | if (status < 0) { |
1252 | set_bit(ops->owner_flag_bit, &sp->so_flags); | |
1253 | nfs4_put_state_owner(sp); | |
4f7cdf18 | 1254 | return nfs4_recovery_handle_error(clp, status); |
7eff03ae TM |
1255 | } |
1256 | nfs4_put_state_owner(sp); | |
1257 | goto restart; | |
02860014 | 1258 | } |
7eff03ae | 1259 | spin_unlock(&clp->cl_lock); |
02860014 TM |
1260 | return status; |
1261 | } | |
1262 | ||
1263 | static int nfs4_check_lease(struct nfs_client *clp) | |
1264 | { | |
1265 | struct rpc_cred *cred; | |
c48f4f35 TM |
1266 | const struct nfs4_state_maintenance_ops *ops = |
1267 | clp->cl_mvops->state_renewal_ops; | |
02860014 | 1268 | int status = -NFS4ERR_EXPIRED; |
1da177e4 | 1269 | |
0f605b56 TM |
1270 | /* Is the client already known to have an expired lease? */ |
1271 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) | |
1272 | return 0; | |
a7b72103 AA |
1273 | spin_lock(&clp->cl_lock); |
1274 | cred = ops->get_state_renewal_cred_locked(clp); | |
1275 | spin_unlock(&clp->cl_lock); | |
0f605b56 TM |
1276 | if (cred == NULL) { |
1277 | cred = nfs4_get_setclientid_cred(clp); | |
1278 | if (cred == NULL) | |
1279 | goto out; | |
286d7d6a | 1280 | } |
8e69514f | 1281 | status = ops->renew_lease(clp, cred); |
0f605b56 TM |
1282 | put_rpccred(cred); |
1283 | out: | |
4f7cdf18 | 1284 | return nfs4_recovery_handle_error(clp, status); |
02860014 TM |
1285 | } |
1286 | ||
1287 | static int nfs4_reclaim_lease(struct nfs_client *clp) | |
1288 | { | |
1289 | struct rpc_cred *cred; | |
c48f4f35 TM |
1290 | const struct nfs4_state_recovery_ops *ops = |
1291 | clp->cl_mvops->reboot_recovery_ops; | |
02860014 TM |
1292 | int status = -ENOENT; |
1293 | ||
90a16617 | 1294 | cred = ops->get_clid_cred(clp); |
286d7d6a | 1295 | if (cred != NULL) { |
591d71cb | 1296 | status = ops->establish_clid(clp, cred); |
286d7d6a | 1297 | put_rpccred(cred); |
a2b2bb88 TM |
1298 | /* Handle case where the user hasn't set up machine creds */ |
1299 | if (status == -EACCES && cred == clp->cl_machine_cred) { | |
1300 | nfs4_clear_machine_cred(clp); | |
02860014 | 1301 | status = -EAGAIN; |
a2b2bb88 | 1302 | } |
c2e713dd BH |
1303 | if (status == -NFS4ERR_MINOR_VERS_MISMATCH) |
1304 | status = -EPROTONOSUPPORT; | |
286d7d6a | 1305 | } |
02860014 TM |
1306 | return status; |
1307 | } | |
1308 | ||
76db6d95 | 1309 | #ifdef CONFIG_NFS_V4_1 |
b9efa1b2 AA |
1310 | void nfs41_handle_recall_slot(struct nfs_client *clp) |
1311 | { | |
1312 | set_bit(NFS4CLNT_RECALL_SLOT, &clp->cl_state); | |
1313 | nfs4_schedule_state_recovery(clp); | |
1314 | } | |
1315 | ||
0f79fd6f TM |
1316 | static void nfs4_reset_all_state(struct nfs_client *clp) |
1317 | { | |
1318 | if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) == 0) { | |
1319 | clp->cl_boot_time = CURRENT_TIME; | |
1320 | nfs4_state_start_reclaim_nograce(clp); | |
1321 | nfs4_schedule_state_recovery(clp); | |
1322 | } | |
1323 | } | |
1324 | ||
1325 | static void nfs41_handle_server_reboot(struct nfs_client *clp) | |
1326 | { | |
1327 | if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) == 0) { | |
1328 | nfs4_state_start_reclaim_reboot(clp); | |
1329 | nfs4_schedule_state_recovery(clp); | |
1330 | } | |
1331 | } | |
1332 | ||
1333 | static void nfs41_handle_state_revoked(struct nfs_client *clp) | |
1334 | { | |
1335 | /* Temporary */ | |
1336 | nfs4_reset_all_state(clp); | |
1337 | } | |
1338 | ||
1339 | static void nfs41_handle_recallable_state_revoked(struct nfs_client *clp) | |
1340 | { | |
1341 | /* This will need to handle layouts too */ | |
1342 | nfs_expire_all_delegations(clp); | |
1343 | } | |
1344 | ||
1345 | static void nfs41_handle_cb_path_down(struct nfs_client *clp) | |
1346 | { | |
1347 | nfs_expire_all_delegations(clp); | |
1348 | if (test_and_set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state) == 0) | |
1349 | nfs4_schedule_state_recovery(clp); | |
1350 | } | |
1351 | ||
0629e370 AB |
1352 | void nfs41_handle_sequence_flag_errors(struct nfs_client *clp, u32 flags) |
1353 | { | |
1354 | if (!flags) | |
1355 | return; | |
0f79fd6f TM |
1356 | else if (flags & SEQ4_STATUS_RESTART_RECLAIM_NEEDED) |
1357 | nfs41_handle_server_reboot(clp); | |
1358 | else if (flags & (SEQ4_STATUS_EXPIRED_ALL_STATE_REVOKED | | |
0629e370 AB |
1359 | SEQ4_STATUS_EXPIRED_SOME_STATE_REVOKED | |
1360 | SEQ4_STATUS_ADMIN_STATE_REVOKED | | |
0f79fd6f TM |
1361 | SEQ4_STATUS_LEASE_MOVED)) |
1362 | nfs41_handle_state_revoked(clp); | |
1363 | else if (flags & SEQ4_STATUS_RECALLABLE_STATE_REVOKED) | |
1364 | nfs41_handle_recallable_state_revoked(clp); | |
1365 | else if (flags & (SEQ4_STATUS_CB_PATH_DOWN | | |
0629e370 AB |
1366 | SEQ4_STATUS_BACKCHANNEL_FAULT | |
1367 | SEQ4_STATUS_CB_PATH_DOWN_SESSION)) | |
0f79fd6f | 1368 | nfs41_handle_cb_path_down(clp); |
0629e370 AB |
1369 | } |
1370 | ||
c3fad1b1 AA |
1371 | static int nfs4_reset_session(struct nfs_client *clp) |
1372 | { | |
1373 | int status; | |
1374 | ||
38045412 | 1375 | nfs4_begin_drain_session(clp); |
c3fad1b1 AA |
1376 | status = nfs4_proc_destroy_session(clp->cl_session); |
1377 | if (status && status != -NFS4ERR_BADSESSION && | |
1378 | status != -NFS4ERR_DEADSESSION) { | |
f455848a | 1379 | status = nfs4_recovery_handle_error(clp, status); |
c3fad1b1 AA |
1380 | goto out; |
1381 | } | |
1382 | ||
1383 | memset(clp->cl_session->sess_id.data, 0, NFS4_MAX_SESSIONID_LEN); | |
f26468fb | 1384 | status = nfs4_proc_create_session(clp); |
41f54a55 | 1385 | if (status) { |
f455848a | 1386 | status = nfs4_recovery_handle_error(clp, status); |
41f54a55 AA |
1387 | goto out; |
1388 | } | |
1389 | /* create_session negotiated new slot table */ | |
1390 | clear_bit(NFS4CLNT_RECALL_SLOT, &clp->cl_state); | |
9dfdf404 | 1391 | |
41f54a55 AA |
1392 | /* Let the state manager reestablish state */ |
1393 | if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) | |
5601a00d | 1394 | nfs41_setup_state_renewal(clp); |
41f54a55 | 1395 | out: |
c3fad1b1 AA |
1396 | return status; |
1397 | } | |
76db6d95 | 1398 | |
b9efa1b2 AA |
1399 | static int nfs4_recall_slot(struct nfs_client *clp) |
1400 | { | |
1401 | struct nfs4_slot_table *fc_tbl = &clp->cl_session->fc_slot_table; | |
1402 | struct nfs4_channel_attrs *fc_attrs = &clp->cl_session->fc_attrs; | |
1403 | struct nfs4_slot *new, *old; | |
1404 | int i; | |
1405 | ||
1406 | nfs4_begin_drain_session(clp); | |
1407 | new = kmalloc(fc_tbl->target_max_slots * sizeof(struct nfs4_slot), | |
8535b2be | 1408 | GFP_NOFS); |
b9efa1b2 AA |
1409 | if (!new) |
1410 | return -ENOMEM; | |
1411 | ||
1412 | spin_lock(&fc_tbl->slot_tbl_lock); | |
1413 | for (i = 0; i < fc_tbl->target_max_slots; i++) | |
1414 | new[i].seq_nr = fc_tbl->slots[i].seq_nr; | |
1415 | old = fc_tbl->slots; | |
1416 | fc_tbl->slots = new; | |
1417 | fc_tbl->max_slots = fc_tbl->target_max_slots; | |
1418 | fc_tbl->target_max_slots = 0; | |
1419 | fc_attrs->max_reqs = fc_tbl->max_slots; | |
1420 | spin_unlock(&fc_tbl->slot_tbl_lock); | |
1421 | ||
1422 | kfree(old); | |
1423 | nfs4_end_drain_session(clp); | |
1424 | return 0; | |
1425 | } | |
1426 | ||
76db6d95 | 1427 | #else /* CONFIG_NFS_V4_1 */ |
c3fad1b1 | 1428 | static int nfs4_reset_session(struct nfs_client *clp) { return 0; } |
5601a00d | 1429 | static int nfs4_end_drain_session(struct nfs_client *clp) { return 0; } |
b9efa1b2 | 1430 | static int nfs4_recall_slot(struct nfs_client *clp) { return 0; } |
76db6d95 AA |
1431 | #endif /* CONFIG_NFS_V4_1 */ |
1432 | ||
78722e9c AA |
1433 | /* Set NFS4CLNT_LEASE_EXPIRED for all v4.0 errors and for recoverable errors |
1434 | * on EXCHANGE_ID for v4.1 | |
1435 | */ | |
1436 | static void nfs4_set_lease_expired(struct nfs_client *clp, int status) | |
1437 | { | |
1438 | if (nfs4_has_session(clp)) { | |
1439 | switch (status) { | |
1440 | case -NFS4ERR_DELAY: | |
1441 | case -NFS4ERR_CLID_INUSE: | |
1442 | case -EAGAIN: | |
1443 | break; | |
1444 | ||
168667c4 TM |
1445 | case -EKEYEXPIRED: |
1446 | nfs4_warn_keyexpired(clp->cl_hostname); | |
78722e9c AA |
1447 | case -NFS4ERR_NOT_SAME: /* FixMe: implement recovery |
1448 | * in nfs4_exchange_id */ | |
1449 | default: | |
1450 | return; | |
1451 | } | |
1452 | } | |
1453 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1454 | } | |
1455 | ||
e005e804 | 1456 | static void nfs4_state_manager(struct nfs_client *clp) |
02860014 | 1457 | { |
02860014 TM |
1458 | int status = 0; |
1459 | ||
02860014 | 1460 | /* Ensure exclusive access to NFSv4 state */ |
f3c76491 | 1461 | for(;;) { |
b79a4a1b TM |
1462 | if (test_and_clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) { |
1463 | /* We're going to have to re-establish a clientid */ | |
1464 | status = nfs4_reclaim_lease(clp); | |
1465 | if (status) { | |
78722e9c | 1466 | nfs4_set_lease_expired(clp, status); |
b6d408ba TM |
1467 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, |
1468 | &clp->cl_state)) | |
b79a4a1b | 1469 | continue; |
76db6d95 AA |
1470 | if (clp->cl_cons_state == |
1471 | NFS_CS_SESSION_INITING) | |
1472 | nfs_mark_client_ready(clp, status); | |
b79a4a1b TM |
1473 | goto out_error; |
1474 | } | |
e598d843 | 1475 | clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); |
7cab89b2 | 1476 | set_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state); |
e598d843 TM |
1477 | } |
1478 | ||
1479 | if (test_and_clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state)) { | |
1480 | status = nfs4_check_lease(clp); | |
b6d408ba | 1481 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
e598d843 | 1482 | continue; |
b6d408ba TM |
1483 | if (status < 0 && status != -NFS4ERR_CB_PATH_DOWN) |
1484 | goto out_error; | |
b79a4a1b | 1485 | } |
b6d408ba | 1486 | |
c3fad1b1 | 1487 | /* Initialize or reset the session */ |
6df08189 | 1488 | if (test_and_clear_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state) |
7111dc73 | 1489 | && nfs4_has_session(clp)) { |
4d643d1d | 1490 | status = nfs4_reset_session(clp); |
b6d408ba TM |
1491 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
1492 | continue; | |
1493 | if (status < 0) | |
76db6d95 | 1494 | goto out_error; |
76db6d95 | 1495 | } |
b6d408ba | 1496 | |
b79a4a1b | 1497 | /* First recover reboot state... */ |
e345e88a | 1498 | if (test_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) { |
591d71cb | 1499 | status = nfs4_do_reclaim(clp, |
c48f4f35 | 1500 | clp->cl_mvops->reboot_recovery_ops); |
b6d408ba | 1501 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) || |
6df08189 | 1502 | test_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state)) |
c3fad1b1 | 1503 | continue; |
b79a4a1b | 1504 | nfs4_state_end_reclaim_reboot(clp); |
b6d408ba TM |
1505 | if (test_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) |
1506 | continue; | |
1507 | if (status < 0) | |
1508 | goto out_error; | |
02860014 TM |
1509 | } |
1510 | ||
b79a4a1b TM |
1511 | /* Now recover expired state... */ |
1512 | if (test_and_clear_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) { | |
591d71cb | 1513 | status = nfs4_do_reclaim(clp, |
c48f4f35 | 1514 | clp->cl_mvops->nograce_recovery_ops); |
b6d408ba | 1515 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) || |
6df08189 | 1516 | test_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state) || |
b6d408ba TM |
1517 | test_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) |
1518 | continue; | |
1519 | if (status < 0) | |
b79a4a1b | 1520 | goto out_error; |
1da177e4 | 1521 | } |
707fb4b3 | 1522 | |
5601a00d | 1523 | nfs4_end_drain_session(clp); |
707fb4b3 TM |
1524 | if (test_and_clear_bit(NFS4CLNT_DELEGRETURN, &clp->cl_state)) { |
1525 | nfs_client_return_marked_delegations(clp); | |
1526 | continue; | |
1527 | } | |
b9efa1b2 AA |
1528 | /* Recall session slots */ |
1529 | if (test_and_clear_bit(NFS4CLNT_RECALL_SLOT, &clp->cl_state) | |
1530 | && nfs4_has_session(clp)) { | |
1531 | status = nfs4_recall_slot(clp); | |
1532 | if (status < 0) | |
1533 | goto out_error; | |
1534 | continue; | |
1535 | } | |
1536 | ||
e005e804 TM |
1537 | |
1538 | nfs4_clear_state_manager_bit(clp); | |
f3c76491 TM |
1539 | /* Did we race with an attempt to give us more work? */ |
1540 | if (clp->cl_state == 0) | |
1541 | break; | |
1542 | if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) != 0) | |
1543 | break; | |
1da177e4 | 1544 | } |
e005e804 | 1545 | return; |
1da177e4 | 1546 | out_error: |
e005e804 | 1547 | printk(KERN_WARNING "Error: state manager failed on NFSv4 server %s" |
5d8515ca | 1548 | " with error %d\n", clp->cl_hostname, -status); |
5601a00d | 1549 | nfs4_end_drain_session(clp); |
e005e804 TM |
1550 | nfs4_clear_state_manager_bit(clp); |
1551 | } | |
1552 | ||
1553 | static int nfs4_run_state_manager(void *ptr) | |
1554 | { | |
1555 | struct nfs_client *clp = ptr; | |
1556 | ||
1557 | allow_signal(SIGKILL); | |
1558 | nfs4_state_manager(clp); | |
1559 | nfs_put_client(clp); | |
1560 | module_put_and_exit(0); | |
1561 | return 0; | |
1da177e4 LT |
1562 | } |
1563 | ||
1564 | /* | |
1565 | * Local variables: | |
1566 | * c-basic-offset: 8 | |
1567 | * End: | |
1568 | */ |