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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * fs/nfs/nfs4state.c | |
3 | * | |
4 | * Client-side XDR for NFSv4. | |
5 | * | |
6 | * Copyright (c) 2002 The Regents of the University of Michigan. | |
7 | * All rights reserved. | |
8 | * | |
9 | * Kendrick Smith <kmsmith@umich.edu> | |
10 | * | |
11 | * Redistribution and use in source and binary forms, with or without | |
12 | * modification, are permitted provided that the following conditions | |
13 | * are met: | |
14 | * | |
15 | * 1. Redistributions of source code must retain the above copyright | |
16 | * notice, this list of conditions and the following disclaimer. | |
17 | * 2. Redistributions in binary form must reproduce the above copyright | |
18 | * notice, this list of conditions and the following disclaimer in the | |
19 | * documentation and/or other materials provided with the distribution. | |
20 | * 3. Neither the name of the University nor the names of its | |
21 | * contributors may be used to endorse or promote products derived | |
22 | * from this software without specific prior written permission. | |
23 | * | |
24 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
25 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
26 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
27 | * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
28 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
29 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
30 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR | |
31 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
32 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
33 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
34 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
35 | * | |
36 | * Implementation of the NFSv4 state model. For the time being, | |
37 | * this is minimal, but will be made much more complex in a | |
38 | * subsequent patch. | |
39 | */ | |
40 | ||
6f43ddcc | 41 | #include <linux/kernel.h> |
1da177e4 LT |
42 | #include <linux/slab.h> |
43 | #include <linux/smp_lock.h> | |
44 | #include <linux/nfs_fs.h> | |
45 | #include <linux/nfs_idmap.h> | |
5043e900 TM |
46 | #include <linux/kthread.h> |
47 | #include <linux/module.h> | |
9f958ab8 | 48 | #include <linux/random.h> |
1da177e4 LT |
49 | #include <linux/workqueue.h> |
50 | #include <linux/bitops.h> | |
51 | ||
4ce79717 | 52 | #include "nfs4_fs.h" |
1da177e4 LT |
53 | #include "callback.h" |
54 | #include "delegation.h" | |
24c8dbbb | 55 | #include "internal.h" |
1da177e4 LT |
56 | |
57 | #define OPENOWNER_POOL_SIZE 8 | |
58 | ||
4ce79717 | 59 | const nfs4_stateid zero_stateid; |
1da177e4 LT |
60 | |
61 | static LIST_HEAD(nfs4_clientid_list); | |
62 | ||
591d71cb | 63 | int nfs4_init_clientid(struct nfs_client *clp, struct rpc_cred *cred) |
1da177e4 | 64 | { |
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 * | |
605 | __nfs4_find_lock_state(struct nfs4_state *state, fl_owner_t fl_owner) | |
606 | { | |
607 | struct nfs4_lock_state *pos; | |
608 | list_for_each_entry(pos, &state->lock_states, ls_locks) { | |
609 | if (pos->ls_owner != fl_owner) | |
610 | continue; | |
611 | atomic_inc(&pos->ls_count); | |
612 | return pos; | |
613 | } | |
614 | return NULL; | |
615 | } | |
616 | ||
1da177e4 LT |
617 | /* |
618 | * Return a compatible lock_state. If no initialized lock_state structure | |
619 | * exists, return an uninitialized one. | |
620 | * | |
1da177e4 LT |
621 | */ |
622 | static struct nfs4_lock_state *nfs4_alloc_lock_state(struct nfs4_state *state, fl_owner_t fl_owner) | |
623 | { | |
624 | struct nfs4_lock_state *lsp; | |
1f0e890d | 625 | struct nfs_client *clp = state->owner->so_server->nfs_client; |
1da177e4 | 626 | |
8535b2be | 627 | lsp = kzalloc(sizeof(*lsp), GFP_NOFS); |
1da177e4 LT |
628 | if (lsp == NULL) |
629 | return NULL; | |
d0dc3701 TM |
630 | rpc_init_wait_queue(&lsp->ls_sequence.wait, "lock_seqid_waitqueue"); |
631 | spin_lock_init(&lsp->ls_sequence.lock); | |
632 | INIT_LIST_HEAD(&lsp->ls_sequence.list); | |
633 | lsp->ls_seqid.sequence = &lsp->ls_sequence; | |
1da177e4 | 634 | atomic_set(&lsp->ls_count, 1); |
b64aec8d | 635 | lsp->ls_state = state; |
1da177e4 | 636 | lsp->ls_owner = fl_owner; |
1da177e4 | 637 | spin_lock(&clp->cl_lock); |
9f958ab8 | 638 | nfs_alloc_unique_id(&clp->cl_lockowner_id, &lsp->ls_id, 1, 64); |
1da177e4 | 639 | spin_unlock(&clp->cl_lock); |
8d0a8a9d | 640 | INIT_LIST_HEAD(&lsp->ls_locks); |
1da177e4 LT |
641 | return lsp; |
642 | } | |
643 | ||
9f958ab8 TM |
644 | static void nfs4_free_lock_state(struct nfs4_lock_state *lsp) |
645 | { | |
1f0e890d | 646 | struct nfs_client *clp = lsp->ls_state->owner->so_server->nfs_client; |
9f958ab8 TM |
647 | |
648 | spin_lock(&clp->cl_lock); | |
649 | nfs_free_unique_id(&clp->cl_lockowner_id, &lsp->ls_id); | |
650 | spin_unlock(&clp->cl_lock); | |
f6a1cc89 | 651 | rpc_destroy_wait_queue(&lsp->ls_sequence.wait); |
9f958ab8 TM |
652 | kfree(lsp); |
653 | } | |
654 | ||
1da177e4 LT |
655 | /* |
656 | * Return a compatible lock_state. If no initialized lock_state structure | |
657 | * exists, return an uninitialized one. | |
658 | * | |
1da177e4 | 659 | */ |
8d0a8a9d | 660 | static struct nfs4_lock_state *nfs4_get_lock_state(struct nfs4_state *state, fl_owner_t owner) |
1da177e4 | 661 | { |
8d0a8a9d | 662 | struct nfs4_lock_state *lsp, *new = NULL; |
1da177e4 | 663 | |
8d0a8a9d TM |
664 | for(;;) { |
665 | spin_lock(&state->state_lock); | |
666 | lsp = __nfs4_find_lock_state(state, owner); | |
667 | if (lsp != NULL) | |
668 | break; | |
669 | if (new != NULL) { | |
8d0a8a9d TM |
670 | list_add(&new->ls_locks, &state->lock_states); |
671 | set_bit(LK_STATE_IN_USE, &state->flags); | |
672 | lsp = new; | |
673 | new = NULL; | |
674 | break; | |
675 | } | |
676 | spin_unlock(&state->state_lock); | |
677 | new = nfs4_alloc_lock_state(state, owner); | |
678 | if (new == NULL) | |
679 | return NULL; | |
680 | } | |
681 | spin_unlock(&state->state_lock); | |
9f958ab8 TM |
682 | if (new != NULL) |
683 | nfs4_free_lock_state(new); | |
1da177e4 LT |
684 | return lsp; |
685 | } | |
686 | ||
687 | /* | |
8d0a8a9d TM |
688 | * Release reference to lock_state, and free it if we see that |
689 | * it is no longer in use | |
1da177e4 | 690 | */ |
faf5f49c | 691 | void nfs4_put_lock_state(struct nfs4_lock_state *lsp) |
1da177e4 | 692 | { |
8d0a8a9d | 693 | struct nfs4_state *state; |
1da177e4 | 694 | |
8d0a8a9d TM |
695 | if (lsp == NULL) |
696 | return; | |
697 | state = lsp->ls_state; | |
698 | if (!atomic_dec_and_lock(&lsp->ls_count, &state->state_lock)) | |
699 | return; | |
700 | list_del(&lsp->ls_locks); | |
701 | if (list_empty(&state->lock_states)) | |
702 | clear_bit(LK_STATE_IN_USE, &state->flags); | |
703 | spin_unlock(&state->state_lock); | |
d3c7b7cc TM |
704 | if (lsp->ls_flags & NFS_LOCK_INITIALIZED) |
705 | nfs4_release_lockowner(lsp); | |
9f958ab8 | 706 | nfs4_free_lock_state(lsp); |
1da177e4 LT |
707 | } |
708 | ||
8d0a8a9d | 709 | static void nfs4_fl_copy_lock(struct file_lock *dst, struct file_lock *src) |
1da177e4 | 710 | { |
8d0a8a9d | 711 | struct nfs4_lock_state *lsp = src->fl_u.nfs4_fl.owner; |
1da177e4 | 712 | |
8d0a8a9d TM |
713 | dst->fl_u.nfs4_fl.owner = lsp; |
714 | atomic_inc(&lsp->ls_count); | |
715 | } | |
1da177e4 | 716 | |
8d0a8a9d | 717 | static void nfs4_fl_release_lock(struct file_lock *fl) |
1da177e4 | 718 | { |
8d0a8a9d | 719 | nfs4_put_lock_state(fl->fl_u.nfs4_fl.owner); |
1da177e4 LT |
720 | } |
721 | ||
6aed6285 | 722 | static const struct file_lock_operations nfs4_fl_lock_ops = { |
8d0a8a9d TM |
723 | .fl_copy_lock = nfs4_fl_copy_lock, |
724 | .fl_release_private = nfs4_fl_release_lock, | |
725 | }; | |
726 | ||
727 | int nfs4_set_lock_state(struct nfs4_state *state, struct file_lock *fl) | |
1da177e4 | 728 | { |
8d0a8a9d TM |
729 | struct nfs4_lock_state *lsp; |
730 | ||
731 | if (fl->fl_ops != NULL) | |
732 | return 0; | |
733 | lsp = nfs4_get_lock_state(state, fl->fl_owner); | |
734 | if (lsp == NULL) | |
735 | return -ENOMEM; | |
736 | fl->fl_u.nfs4_fl.owner = lsp; | |
737 | fl->fl_ops = &nfs4_fl_lock_ops; | |
738 | return 0; | |
1da177e4 LT |
739 | } |
740 | ||
8d0a8a9d TM |
741 | /* |
742 | * Byte-range lock aware utility to initialize the stateid of read/write | |
743 | * requests. | |
1da177e4 | 744 | */ |
8d0a8a9d | 745 | void nfs4_copy_stateid(nfs4_stateid *dst, struct nfs4_state *state, fl_owner_t fl_owner) |
1da177e4 | 746 | { |
8d0a8a9d | 747 | struct nfs4_lock_state *lsp; |
8bda4e4c | 748 | int seq; |
1da177e4 | 749 | |
8bda4e4c TM |
750 | do { |
751 | seq = read_seqbegin(&state->seqlock); | |
752 | memcpy(dst, &state->stateid, sizeof(*dst)); | |
753 | } while (read_seqretry(&state->seqlock, seq)); | |
8d0a8a9d TM |
754 | if (test_bit(LK_STATE_IN_USE, &state->flags) == 0) |
755 | return; | |
1da177e4 | 756 | |
8d0a8a9d TM |
757 | spin_lock(&state->state_lock); |
758 | lsp = __nfs4_find_lock_state(state, fl_owner); | |
759 | if (lsp != NULL && (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0) | |
760 | memcpy(dst, &lsp->ls_stateid, sizeof(*dst)); | |
761 | spin_unlock(&state->state_lock); | |
1da177e4 LT |
762 | nfs4_put_lock_state(lsp); |
763 | } | |
764 | ||
8535b2be | 765 | struct nfs_seqid *nfs_alloc_seqid(struct nfs_seqid_counter *counter, gfp_t gfp_mask) |
cee54fc9 | 766 | { |
cee54fc9 TM |
767 | struct nfs_seqid *new; |
768 | ||
8535b2be | 769 | new = kmalloc(sizeof(*new), gfp_mask); |
cee54fc9 TM |
770 | if (new != NULL) { |
771 | new->sequence = counter; | |
2f74c0a0 | 772 | INIT_LIST_HEAD(&new->list); |
cee54fc9 TM |
773 | } |
774 | return new; | |
775 | } | |
776 | ||
72211dbe | 777 | void nfs_release_seqid(struct nfs_seqid *seqid) |
1da177e4 | 778 | { |
2f74c0a0 TM |
779 | if (!list_empty(&seqid->list)) { |
780 | struct rpc_sequence *sequence = seqid->sequence->sequence; | |
cee54fc9 | 781 | |
2f74c0a0 | 782 | spin_lock(&sequence->lock); |
72211dbe | 783 | list_del_init(&seqid->list); |
2f74c0a0 TM |
784 | spin_unlock(&sequence->lock); |
785 | rpc_wake_up(&sequence->wait); | |
786 | } | |
72211dbe TM |
787 | } |
788 | ||
789 | void nfs_free_seqid(struct nfs_seqid *seqid) | |
790 | { | |
791 | nfs_release_seqid(seqid); | |
cee54fc9 | 792 | kfree(seqid); |
1da177e4 LT |
793 | } |
794 | ||
795 | /* | |
cee54fc9 TM |
796 | * Increment the seqid if the OPEN/OPEN_DOWNGRADE/CLOSE succeeded, or |
797 | * failed with a seqid incrementing error - | |
798 | * see comments nfs_fs.h:seqid_mutating_error() | |
799 | */ | |
88d90939 | 800 | static void nfs_increment_seqid(int status, struct nfs_seqid *seqid) |
cee54fc9 | 801 | { |
2f74c0a0 | 802 | BUG_ON(list_first_entry(&seqid->sequence->sequence->list, struct nfs_seqid, list) != seqid); |
cee54fc9 TM |
803 | switch (status) { |
804 | case 0: | |
805 | break; | |
806 | case -NFS4ERR_BAD_SEQID: | |
6f43ddcc TM |
807 | if (seqid->sequence->flags & NFS_SEQID_CONFIRMED) |
808 | return; | |
809 | printk(KERN_WARNING "NFS: v4 server returned a bad" | |
497799e7 DM |
810 | " sequence-id error on an" |
811 | " unconfirmed sequence %p!\n", | |
6f43ddcc | 812 | seqid->sequence); |
cee54fc9 TM |
813 | case -NFS4ERR_STALE_CLIENTID: |
814 | case -NFS4ERR_STALE_STATEID: | |
815 | case -NFS4ERR_BAD_STATEID: | |
816 | case -NFS4ERR_BADXDR: | |
817 | case -NFS4ERR_RESOURCE: | |
818 | case -NFS4ERR_NOFILEHANDLE: | |
819 | /* Non-seqid mutating errors */ | |
820 | return; | |
821 | }; | |
822 | /* | |
823 | * Note: no locking needed as we are guaranteed to be first | |
824 | * on the sequence list | |
825 | */ | |
826 | seqid->sequence->counter++; | |
827 | } | |
828 | ||
829 | void nfs_increment_open_seqid(int status, struct nfs_seqid *seqid) | |
830 | { | |
34dc1ad7 BH |
831 | struct nfs4_state_owner *sp = container_of(seqid->sequence, |
832 | struct nfs4_state_owner, so_seqid); | |
833 | struct nfs_server *server = sp->so_server; | |
834 | ||
835 | if (status == -NFS4ERR_BAD_SEQID) | |
1da177e4 | 836 | nfs4_drop_state_owner(sp); |
34dc1ad7 BH |
837 | if (!nfs4_has_session(server->nfs_client)) |
838 | nfs_increment_seqid(status, seqid); | |
cee54fc9 TM |
839 | } |
840 | ||
841 | /* | |
cee54fc9 TM |
842 | * Increment the seqid if the LOCK/LOCKU succeeded, or |
843 | * failed with a seqid incrementing error - | |
844 | * see comments nfs_fs.h:seqid_mutating_error() | |
845 | */ | |
846 | void nfs_increment_lock_seqid(int status, struct nfs_seqid *seqid) | |
847 | { | |
88d90939 | 848 | nfs_increment_seqid(status, seqid); |
cee54fc9 TM |
849 | } |
850 | ||
851 | int nfs_wait_on_sequence(struct nfs_seqid *seqid, struct rpc_task *task) | |
852 | { | |
853 | struct rpc_sequence *sequence = seqid->sequence->sequence; | |
854 | int status = 0; | |
855 | ||
856 | spin_lock(&sequence->lock); | |
2f74c0a0 TM |
857 | if (list_empty(&seqid->list)) |
858 | list_add_tail(&seqid->list, &sequence->list); | |
859 | if (list_first_entry(&sequence->list, struct nfs_seqid, list) == seqid) | |
860 | goto unlock; | |
5d00837b | 861 | rpc_sleep_on(&sequence->wait, task, NULL); |
2f74c0a0 TM |
862 | status = -EAGAIN; |
863 | unlock: | |
cee54fc9 TM |
864 | spin_unlock(&sequence->lock); |
865 | return status; | |
1da177e4 LT |
866 | } |
867 | ||
e005e804 | 868 | static int nfs4_run_state_manager(void *); |
1da177e4 | 869 | |
e005e804 | 870 | static void nfs4_clear_state_manager_bit(struct nfs_client *clp) |
433fbe4c TM |
871 | { |
872 | smp_mb__before_clear_bit(); | |
e005e804 | 873 | clear_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state); |
433fbe4c | 874 | smp_mb__after_clear_bit(); |
e005e804 | 875 | wake_up_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING); |
433fbe4c TM |
876 | rpc_wake_up(&clp->cl_rpcwaitq); |
877 | } | |
878 | ||
1da177e4 | 879 | /* |
e005e804 | 880 | * Schedule the nfs_client asynchronous state management routine |
1da177e4 | 881 | */ |
b0d3ded1 | 882 | void nfs4_schedule_state_manager(struct nfs_client *clp) |
1da177e4 | 883 | { |
5043e900 | 884 | struct task_struct *task; |
1da177e4 | 885 | |
e005e804 TM |
886 | if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) != 0) |
887 | return; | |
5043e900 TM |
888 | __module_get(THIS_MODULE); |
889 | atomic_inc(&clp->cl_count); | |
e005e804 | 890 | task = kthread_run(nfs4_run_state_manager, clp, "%s-manager", |
5d8515ca CL |
891 | rpc_peeraddr2str(clp->cl_rpcclient, |
892 | RPC_DISPLAY_ADDR)); | |
5043e900 TM |
893 | if (!IS_ERR(task)) |
894 | return; | |
e005e804 | 895 | nfs4_clear_state_manager_bit(clp); |
24c8dbbb | 896 | nfs_put_client(clp); |
5043e900 | 897 | module_put(THIS_MODULE); |
1da177e4 LT |
898 | } |
899 | ||
900 | /* | |
901 | * Schedule a state recovery attempt | |
902 | */ | |
adfa6f98 | 903 | void nfs4_schedule_state_recovery(struct nfs_client *clp) |
1da177e4 LT |
904 | { |
905 | if (!clp) | |
906 | return; | |
e598d843 TM |
907 | if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
908 | set_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); | |
e005e804 | 909 | nfs4_schedule_state_manager(clp); |
1da177e4 LT |
910 | } |
911 | ||
a2c0b9e2 | 912 | int nfs4_state_mark_reclaim_reboot(struct nfs_client *clp, struct nfs4_state *state) |
b79a4a1b TM |
913 | { |
914 | ||
915 | set_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); | |
916 | /* Don't recover state that expired before the reboot */ | |
917 | if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) { | |
918 | clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); | |
919 | return 0; | |
920 | } | |
7eff03ae | 921 | set_bit(NFS_OWNER_RECLAIM_REBOOT, &state->owner->so_flags); |
b79a4a1b TM |
922 | set_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state); |
923 | return 1; | |
924 | } | |
925 | ||
9e33bed5 | 926 | int nfs4_state_mark_reclaim_nograce(struct nfs_client *clp, struct nfs4_state *state) |
b79a4a1b TM |
927 | { |
928 | set_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags); | |
929 | clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); | |
7eff03ae | 930 | set_bit(NFS_OWNER_RECLAIM_NOGRACE, &state->owner->so_flags); |
b79a4a1b TM |
931 | set_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state); |
932 | return 1; | |
933 | } | |
934 | ||
02860014 | 935 | static int nfs4_reclaim_locks(struct nfs4_state *state, const struct nfs4_state_recovery_ops *ops) |
1da177e4 LT |
936 | { |
937 | struct inode *inode = state->inode; | |
19e03c57 | 938 | struct nfs_inode *nfsi = NFS_I(inode); |
1da177e4 LT |
939 | struct file_lock *fl; |
940 | int status = 0; | |
941 | ||
3f09df70 TM |
942 | if (inode->i_flock == NULL) |
943 | return 0; | |
944 | ||
945 | /* Guard against delegation returns and new lock/unlock calls */ | |
19e03c57 | 946 | down_write(&nfsi->rwsem); |
3f09df70 TM |
947 | /* Protect inode->i_flock using the BKL */ |
948 | lock_kernel(); | |
90dc7d27 | 949 | for (fl = inode->i_flock; fl != NULL; fl = fl->fl_next) { |
43b2a33a | 950 | if (!(fl->fl_flags & (FL_POSIX|FL_FLOCK))) |
1da177e4 | 951 | continue; |
cd3758e3 | 952 | if (nfs_file_open_context(fl->fl_file)->state != state) |
1da177e4 | 953 | continue; |
3f09df70 | 954 | unlock_kernel(); |
1da177e4 | 955 | status = ops->recover_lock(state, fl); |
1da177e4 | 956 | switch (status) { |
965b5d67 TM |
957 | case 0: |
958 | break; | |
959 | case -ESTALE: | |
960 | case -NFS4ERR_ADMIN_REVOKED: | |
961 | case -NFS4ERR_STALE_STATEID: | |
962 | case -NFS4ERR_BAD_STATEID: | |
963 | case -NFS4ERR_EXPIRED: | |
964 | case -NFS4ERR_NO_GRACE: | |
965 | case -NFS4ERR_STALE_CLIENTID: | |
9c4c761a TM |
966 | case -NFS4ERR_BADSESSION: |
967 | case -NFS4ERR_BADSLOT: | |
968 | case -NFS4ERR_BAD_HIGH_SLOT: | |
969 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
965b5d67 | 970 | goto out; |
1da177e4 LT |
971 | default: |
972 | printk(KERN_ERR "%s: unhandled error %d. Zeroing state\n", | |
3110ff80 | 973 | __func__, status); |
965b5d67 TM |
974 | case -ENOMEM: |
975 | case -NFS4ERR_DENIED: | |
1da177e4 LT |
976 | case -NFS4ERR_RECLAIM_BAD: |
977 | case -NFS4ERR_RECLAIM_CONFLICT: | |
43b2a33a | 978 | /* kill_proc(fl->fl_pid, SIGLOST, 1); */ |
965b5d67 | 979 | status = 0; |
1da177e4 | 980 | } |
3f09df70 | 981 | lock_kernel(); |
1da177e4 | 982 | } |
3f09df70 | 983 | unlock_kernel(); |
965b5d67 | 984 | out: |
19e03c57 | 985 | up_write(&nfsi->rwsem); |
1da177e4 LT |
986 | return status; |
987 | } | |
988 | ||
02860014 | 989 | static int nfs4_reclaim_open_state(struct nfs4_state_owner *sp, const struct nfs4_state_recovery_ops *ops) |
1da177e4 LT |
990 | { |
991 | struct nfs4_state *state; | |
992 | struct nfs4_lock_state *lock; | |
993 | int status = 0; | |
994 | ||
995 | /* Note: we rely on the sp->so_states list being ordered | |
996 | * so that we always reclaim open(O_RDWR) and/or open(O_WRITE) | |
997 | * states first. | |
998 | * This is needed to ensure that the server won't give us any | |
999 | * read delegations that we have to return if, say, we are | |
1000 | * recovering after a network partition or a reboot from a | |
1001 | * server that doesn't support a grace period. | |
1002 | */ | |
fe1d8195 TM |
1003 | restart: |
1004 | spin_lock(&sp->so_lock); | |
1da177e4 | 1005 | list_for_each_entry(state, &sp->so_states, open_states) { |
b79a4a1b TM |
1006 | if (!test_and_clear_bit(ops->state_flag_bit, &state->flags)) |
1007 | continue; | |
1da177e4 LT |
1008 | if (state->state == 0) |
1009 | continue; | |
fe1d8195 TM |
1010 | atomic_inc(&state->count); |
1011 | spin_unlock(&sp->so_lock); | |
1da177e4 | 1012 | status = ops->recover_open(sp, state); |
1da177e4 | 1013 | if (status >= 0) { |
02860014 TM |
1014 | status = nfs4_reclaim_locks(state, ops); |
1015 | if (status >= 0) { | |
1016 | list_for_each_entry(lock, &state->lock_states, ls_locks) { | |
1017 | if (!(lock->ls_flags & NFS_LOCK_INITIALIZED)) | |
1018 | printk("%s: Lock reclaim failed!\n", | |
3110ff80 | 1019 | __func__); |
02860014 | 1020 | } |
fe1d8195 TM |
1021 | nfs4_put_open_state(state); |
1022 | goto restart; | |
1da177e4 | 1023 | } |
1da177e4 LT |
1024 | } |
1025 | switch (status) { | |
1026 | default: | |
1027 | printk(KERN_ERR "%s: unhandled error %d. Zeroing state\n", | |
3110ff80 | 1028 | __func__, status); |
1da177e4 | 1029 | case -ENOENT: |
965b5d67 | 1030 | case -ENOMEM: |
b79a4a1b | 1031 | case -ESTALE: |
1da177e4 LT |
1032 | /* |
1033 | * Open state on this file cannot be recovered | |
1034 | * All we can do is revert to using the zero stateid. | |
1035 | */ | |
1036 | memset(state->stateid.data, 0, | |
1037 | sizeof(state->stateid.data)); | |
1038 | /* Mark the file as being 'closed' */ | |
1039 | state->state = 0; | |
1040 | break; | |
965b5d67 TM |
1041 | case -NFS4ERR_ADMIN_REVOKED: |
1042 | case -NFS4ERR_STALE_STATEID: | |
1043 | case -NFS4ERR_BAD_STATEID: | |
b79a4a1b TM |
1044 | case -NFS4ERR_RECLAIM_BAD: |
1045 | case -NFS4ERR_RECLAIM_CONFLICT: | |
1f0e890d | 1046 | nfs4_state_mark_reclaim_nograce(sp->so_server->nfs_client, state); |
b79a4a1b | 1047 | break; |
1da177e4 LT |
1048 | case -NFS4ERR_EXPIRED: |
1049 | case -NFS4ERR_NO_GRACE: | |
1f0e890d | 1050 | nfs4_state_mark_reclaim_nograce(sp->so_server->nfs_client, state); |
1da177e4 | 1051 | case -NFS4ERR_STALE_CLIENTID: |
9c4c761a TM |
1052 | case -NFS4ERR_BADSESSION: |
1053 | case -NFS4ERR_BADSLOT: | |
1054 | case -NFS4ERR_BAD_HIGH_SLOT: | |
1055 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
1da177e4 LT |
1056 | goto out_err; |
1057 | } | |
fe1d8195 TM |
1058 | nfs4_put_open_state(state); |
1059 | goto restart; | |
1da177e4 | 1060 | } |
fe1d8195 | 1061 | spin_unlock(&sp->so_lock); |
1da177e4 LT |
1062 | return 0; |
1063 | out_err: | |
fe1d8195 | 1064 | nfs4_put_open_state(state); |
1da177e4 LT |
1065 | return status; |
1066 | } | |
1067 | ||
b79a4a1b TM |
1068 | static void nfs4_clear_open_state(struct nfs4_state *state) |
1069 | { | |
1070 | struct nfs4_lock_state *lock; | |
1071 | ||
1072 | clear_bit(NFS_DELEGATED_STATE, &state->flags); | |
1073 | clear_bit(NFS_O_RDONLY_STATE, &state->flags); | |
1074 | clear_bit(NFS_O_WRONLY_STATE, &state->flags); | |
1075 | clear_bit(NFS_O_RDWR_STATE, &state->flags); | |
1076 | list_for_each_entry(lock, &state->lock_states, ls_locks) { | |
b79a4a1b TM |
1077 | lock->ls_seqid.flags = 0; |
1078 | lock->ls_flags &= ~NFS_LOCK_INITIALIZED; | |
1079 | } | |
1080 | } | |
1081 | ||
1082 | static void nfs4_state_mark_reclaim_helper(struct nfs_client *clp, int (*mark_reclaim)(struct nfs_client *clp, struct nfs4_state *state)) | |
cee54fc9 TM |
1083 | { |
1084 | struct nfs4_state_owner *sp; | |
9f958ab8 | 1085 | struct rb_node *pos; |
cee54fc9 | 1086 | struct nfs4_state *state; |
cee54fc9 TM |
1087 | |
1088 | /* Reset all sequence ids to zero */ | |
9f958ab8 TM |
1089 | for (pos = rb_first(&clp->cl_state_owners); pos != NULL; pos = rb_next(pos)) { |
1090 | sp = rb_entry(pos, struct nfs4_state_owner, so_client_node); | |
cee54fc9 | 1091 | sp->so_seqid.flags = 0; |
ec073428 | 1092 | spin_lock(&sp->so_lock); |
cee54fc9 | 1093 | list_for_each_entry(state, &sp->so_states, open_states) { |
b79a4a1b TM |
1094 | if (mark_reclaim(clp, state)) |
1095 | nfs4_clear_open_state(state); | |
cee54fc9 | 1096 | } |
ec073428 | 1097 | spin_unlock(&sp->so_lock); |
cee54fc9 TM |
1098 | } |
1099 | } | |
1100 | ||
b79a4a1b TM |
1101 | static void nfs4_state_start_reclaim_reboot(struct nfs_client *clp) |
1102 | { | |
1103 | /* Mark all delegations for reclaim */ | |
1104 | nfs_delegation_mark_reclaim(clp); | |
1105 | nfs4_state_mark_reclaim_helper(clp, nfs4_state_mark_reclaim_reboot); | |
1106 | } | |
1107 | ||
fce5c838 RL |
1108 | static void nfs4_reclaim_complete(struct nfs_client *clp, |
1109 | const struct nfs4_state_recovery_ops *ops) | |
1110 | { | |
1111 | /* Notify the server we're done reclaiming our state */ | |
1112 | if (ops->reclaim_complete) | |
1113 | (void)ops->reclaim_complete(clp); | |
1114 | } | |
1115 | ||
b79a4a1b TM |
1116 | static void nfs4_state_end_reclaim_reboot(struct nfs_client *clp) |
1117 | { | |
1118 | struct nfs4_state_owner *sp; | |
1119 | struct rb_node *pos; | |
1120 | struct nfs4_state *state; | |
1121 | ||
1122 | if (!test_and_clear_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) | |
1123 | return; | |
1124 | ||
c48f4f35 | 1125 | nfs4_reclaim_complete(clp, clp->cl_mvops->reboot_recovery_ops); |
7cab89b2 | 1126 | |
b79a4a1b TM |
1127 | for (pos = rb_first(&clp->cl_state_owners); pos != NULL; pos = rb_next(pos)) { |
1128 | sp = rb_entry(pos, struct nfs4_state_owner, so_client_node); | |
1129 | spin_lock(&sp->so_lock); | |
1130 | list_for_each_entry(state, &sp->so_states, open_states) { | |
1131 | if (!test_and_clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags)) | |
1132 | continue; | |
1133 | nfs4_state_mark_reclaim_nograce(clp, state); | |
1134 | } | |
1135 | spin_unlock(&sp->so_lock); | |
1136 | } | |
1137 | ||
1138 | nfs_delegation_reap_unclaimed(clp); | |
1139 | } | |
1140 | ||
1141 | static void nfs_delegation_clear_all(struct nfs_client *clp) | |
1142 | { | |
1143 | nfs_delegation_mark_reclaim(clp); | |
1144 | nfs_delegation_reap_unclaimed(clp); | |
1145 | } | |
1146 | ||
1147 | static void nfs4_state_start_reclaim_nograce(struct nfs_client *clp) | |
1148 | { | |
1149 | nfs_delegation_clear_all(clp); | |
1150 | nfs4_state_mark_reclaim_helper(clp, nfs4_state_mark_reclaim_nograce); | |
1151 | } | |
1152 | ||
4f7cdf18 | 1153 | static int nfs4_recovery_handle_error(struct nfs_client *clp, int error) |
e598d843 TM |
1154 | { |
1155 | switch (error) { | |
1156 | case -NFS4ERR_CB_PATH_DOWN: | |
707fb4b3 | 1157 | nfs_handle_cb_pathdown(clp); |
4f7cdf18 | 1158 | return 0; |
c8b7ae3d TM |
1159 | case -NFS4ERR_NO_GRACE: |
1160 | nfs4_state_end_reclaim_reboot(clp); | |
1161 | return 0; | |
e598d843 TM |
1162 | case -NFS4ERR_STALE_CLIENTID: |
1163 | case -NFS4ERR_LEASE_MOVED: | |
1164 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
e345e88a | 1165 | nfs4_state_end_reclaim_reboot(clp); |
e598d843 TM |
1166 | nfs4_state_start_reclaim_reboot(clp); |
1167 | break; | |
1168 | case -NFS4ERR_EXPIRED: | |
1169 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1170 | nfs4_state_start_reclaim_nograce(clp); | |
8ba9bf8e | 1171 | break; |
c3fad1b1 AA |
1172 | case -NFS4ERR_BADSESSION: |
1173 | case -NFS4ERR_BADSLOT: | |
1174 | case -NFS4ERR_BAD_HIGH_SLOT: | |
1175 | case -NFS4ERR_DEADSESSION: | |
1176 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
1177 | case -NFS4ERR_SEQ_FALSE_RETRY: | |
1178 | case -NFS4ERR_SEQ_MISORDERED: | |
6df08189 | 1179 | set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); |
0b9e2d41 AA |
1180 | /* Zero session reset errors */ |
1181 | return 0; | |
e598d843 | 1182 | } |
4f7cdf18 | 1183 | return error; |
e598d843 TM |
1184 | } |
1185 | ||
02860014 | 1186 | static int nfs4_do_reclaim(struct nfs_client *clp, const struct nfs4_state_recovery_ops *ops) |
1da177e4 | 1187 | { |
9f958ab8 | 1188 | struct rb_node *pos; |
1da177e4 LT |
1189 | int status = 0; |
1190 | ||
7eff03ae TM |
1191 | restart: |
1192 | spin_lock(&clp->cl_lock); | |
02860014 TM |
1193 | for (pos = rb_first(&clp->cl_state_owners); pos != NULL; pos = rb_next(pos)) { |
1194 | struct nfs4_state_owner *sp = rb_entry(pos, struct nfs4_state_owner, so_client_node); | |
7eff03ae TM |
1195 | if (!test_and_clear_bit(ops->owner_flag_bit, &sp->so_flags)) |
1196 | continue; | |
1197 | atomic_inc(&sp->so_count); | |
1198 | spin_unlock(&clp->cl_lock); | |
02860014 | 1199 | status = nfs4_reclaim_open_state(sp, ops); |
7eff03ae TM |
1200 | if (status < 0) { |
1201 | set_bit(ops->owner_flag_bit, &sp->so_flags); | |
1202 | nfs4_put_state_owner(sp); | |
4f7cdf18 | 1203 | return nfs4_recovery_handle_error(clp, status); |
7eff03ae TM |
1204 | } |
1205 | nfs4_put_state_owner(sp); | |
1206 | goto restart; | |
02860014 | 1207 | } |
7eff03ae | 1208 | spin_unlock(&clp->cl_lock); |
02860014 TM |
1209 | return status; |
1210 | } | |
1211 | ||
1212 | static int nfs4_check_lease(struct nfs_client *clp) | |
1213 | { | |
1214 | struct rpc_cred *cred; | |
c48f4f35 TM |
1215 | const struct nfs4_state_maintenance_ops *ops = |
1216 | clp->cl_mvops->state_renewal_ops; | |
02860014 | 1217 | int status = -NFS4ERR_EXPIRED; |
1da177e4 | 1218 | |
0f605b56 TM |
1219 | /* Is the client already known to have an expired lease? */ |
1220 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) | |
1221 | return 0; | |
a7b72103 AA |
1222 | spin_lock(&clp->cl_lock); |
1223 | cred = ops->get_state_renewal_cred_locked(clp); | |
1224 | spin_unlock(&clp->cl_lock); | |
0f605b56 TM |
1225 | if (cred == NULL) { |
1226 | cred = nfs4_get_setclientid_cred(clp); | |
1227 | if (cred == NULL) | |
1228 | goto out; | |
286d7d6a | 1229 | } |
8e69514f | 1230 | status = ops->renew_lease(clp, cred); |
0f605b56 TM |
1231 | put_rpccred(cred); |
1232 | out: | |
4f7cdf18 | 1233 | return nfs4_recovery_handle_error(clp, status); |
02860014 TM |
1234 | } |
1235 | ||
1236 | static int nfs4_reclaim_lease(struct nfs_client *clp) | |
1237 | { | |
1238 | struct rpc_cred *cred; | |
c48f4f35 TM |
1239 | const struct nfs4_state_recovery_ops *ops = |
1240 | clp->cl_mvops->reboot_recovery_ops; | |
02860014 TM |
1241 | int status = -ENOENT; |
1242 | ||
90a16617 | 1243 | cred = ops->get_clid_cred(clp); |
286d7d6a | 1244 | if (cred != NULL) { |
591d71cb | 1245 | status = ops->establish_clid(clp, cred); |
286d7d6a | 1246 | put_rpccred(cred); |
a2b2bb88 TM |
1247 | /* Handle case where the user hasn't set up machine creds */ |
1248 | if (status == -EACCES && cred == clp->cl_machine_cred) { | |
1249 | nfs4_clear_machine_cred(clp); | |
02860014 | 1250 | status = -EAGAIN; |
a2b2bb88 | 1251 | } |
c2e713dd BH |
1252 | if (status == -NFS4ERR_MINOR_VERS_MISMATCH) |
1253 | status = -EPROTONOSUPPORT; | |
286d7d6a | 1254 | } |
02860014 TM |
1255 | return status; |
1256 | } | |
1257 | ||
76db6d95 | 1258 | #ifdef CONFIG_NFS_V4_1 |
b9efa1b2 AA |
1259 | void nfs41_handle_recall_slot(struct nfs_client *clp) |
1260 | { | |
1261 | set_bit(NFS4CLNT_RECALL_SLOT, &clp->cl_state); | |
1262 | nfs4_schedule_state_recovery(clp); | |
1263 | } | |
1264 | ||
0f79fd6f TM |
1265 | static void nfs4_reset_all_state(struct nfs_client *clp) |
1266 | { | |
1267 | if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) == 0) { | |
1268 | clp->cl_boot_time = CURRENT_TIME; | |
1269 | nfs4_state_start_reclaim_nograce(clp); | |
1270 | nfs4_schedule_state_recovery(clp); | |
1271 | } | |
1272 | } | |
1273 | ||
1274 | static void nfs41_handle_server_reboot(struct nfs_client *clp) | |
1275 | { | |
1276 | if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) == 0) { | |
1277 | nfs4_state_start_reclaim_reboot(clp); | |
1278 | nfs4_schedule_state_recovery(clp); | |
1279 | } | |
1280 | } | |
1281 | ||
1282 | static void nfs41_handle_state_revoked(struct nfs_client *clp) | |
1283 | { | |
1284 | /* Temporary */ | |
1285 | nfs4_reset_all_state(clp); | |
1286 | } | |
1287 | ||
1288 | static void nfs41_handle_recallable_state_revoked(struct nfs_client *clp) | |
1289 | { | |
1290 | /* This will need to handle layouts too */ | |
1291 | nfs_expire_all_delegations(clp); | |
1292 | } | |
1293 | ||
1294 | static void nfs41_handle_cb_path_down(struct nfs_client *clp) | |
1295 | { | |
1296 | nfs_expire_all_delegations(clp); | |
1297 | if (test_and_set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state) == 0) | |
1298 | nfs4_schedule_state_recovery(clp); | |
1299 | } | |
1300 | ||
0629e370 AB |
1301 | void nfs41_handle_sequence_flag_errors(struct nfs_client *clp, u32 flags) |
1302 | { | |
1303 | if (!flags) | |
1304 | return; | |
0f79fd6f TM |
1305 | else if (flags & SEQ4_STATUS_RESTART_RECLAIM_NEEDED) |
1306 | nfs41_handle_server_reboot(clp); | |
1307 | else if (flags & (SEQ4_STATUS_EXPIRED_ALL_STATE_REVOKED | | |
0629e370 AB |
1308 | SEQ4_STATUS_EXPIRED_SOME_STATE_REVOKED | |
1309 | SEQ4_STATUS_ADMIN_STATE_REVOKED | | |
0f79fd6f TM |
1310 | SEQ4_STATUS_LEASE_MOVED)) |
1311 | nfs41_handle_state_revoked(clp); | |
1312 | else if (flags & SEQ4_STATUS_RECALLABLE_STATE_REVOKED) | |
1313 | nfs41_handle_recallable_state_revoked(clp); | |
1314 | else if (flags & (SEQ4_STATUS_CB_PATH_DOWN | | |
0629e370 AB |
1315 | SEQ4_STATUS_BACKCHANNEL_FAULT | |
1316 | SEQ4_STATUS_CB_PATH_DOWN_SESSION)) | |
0f79fd6f | 1317 | nfs41_handle_cb_path_down(clp); |
0629e370 AB |
1318 | } |
1319 | ||
c3fad1b1 AA |
1320 | static int nfs4_reset_session(struct nfs_client *clp) |
1321 | { | |
1322 | int status; | |
1323 | ||
38045412 | 1324 | nfs4_begin_drain_session(clp); |
c3fad1b1 AA |
1325 | status = nfs4_proc_destroy_session(clp->cl_session); |
1326 | if (status && status != -NFS4ERR_BADSESSION && | |
1327 | status != -NFS4ERR_DEADSESSION) { | |
f455848a | 1328 | status = nfs4_recovery_handle_error(clp, status); |
c3fad1b1 AA |
1329 | goto out; |
1330 | } | |
1331 | ||
1332 | memset(clp->cl_session->sess_id.data, 0, NFS4_MAX_SESSIONID_LEN); | |
f26468fb | 1333 | status = nfs4_proc_create_session(clp); |
41f54a55 | 1334 | if (status) { |
f455848a | 1335 | status = nfs4_recovery_handle_error(clp, status); |
41f54a55 AA |
1336 | goto out; |
1337 | } | |
1338 | /* create_session negotiated new slot table */ | |
1339 | clear_bit(NFS4CLNT_RECALL_SLOT, &clp->cl_state); | |
9dfdf404 | 1340 | |
41f54a55 AA |
1341 | /* Let the state manager reestablish state */ |
1342 | if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) | |
5601a00d | 1343 | nfs41_setup_state_renewal(clp); |
41f54a55 | 1344 | out: |
c3fad1b1 AA |
1345 | return status; |
1346 | } | |
76db6d95 | 1347 | |
b9efa1b2 AA |
1348 | static int nfs4_recall_slot(struct nfs_client *clp) |
1349 | { | |
1350 | struct nfs4_slot_table *fc_tbl = &clp->cl_session->fc_slot_table; | |
1351 | struct nfs4_channel_attrs *fc_attrs = &clp->cl_session->fc_attrs; | |
1352 | struct nfs4_slot *new, *old; | |
1353 | int i; | |
1354 | ||
1355 | nfs4_begin_drain_session(clp); | |
1356 | new = kmalloc(fc_tbl->target_max_slots * sizeof(struct nfs4_slot), | |
8535b2be | 1357 | GFP_NOFS); |
b9efa1b2 AA |
1358 | if (!new) |
1359 | return -ENOMEM; | |
1360 | ||
1361 | spin_lock(&fc_tbl->slot_tbl_lock); | |
1362 | for (i = 0; i < fc_tbl->target_max_slots; i++) | |
1363 | new[i].seq_nr = fc_tbl->slots[i].seq_nr; | |
1364 | old = fc_tbl->slots; | |
1365 | fc_tbl->slots = new; | |
1366 | fc_tbl->max_slots = fc_tbl->target_max_slots; | |
1367 | fc_tbl->target_max_slots = 0; | |
1368 | fc_attrs->max_reqs = fc_tbl->max_slots; | |
1369 | spin_unlock(&fc_tbl->slot_tbl_lock); | |
1370 | ||
1371 | kfree(old); | |
1372 | nfs4_end_drain_session(clp); | |
1373 | return 0; | |
1374 | } | |
1375 | ||
76db6d95 | 1376 | #else /* CONFIG_NFS_V4_1 */ |
c3fad1b1 | 1377 | static int nfs4_reset_session(struct nfs_client *clp) { return 0; } |
5601a00d | 1378 | static int nfs4_end_drain_session(struct nfs_client *clp) { return 0; } |
b9efa1b2 | 1379 | static int nfs4_recall_slot(struct nfs_client *clp) { return 0; } |
76db6d95 AA |
1380 | #endif /* CONFIG_NFS_V4_1 */ |
1381 | ||
78722e9c AA |
1382 | /* Set NFS4CLNT_LEASE_EXPIRED for all v4.0 errors and for recoverable errors |
1383 | * on EXCHANGE_ID for v4.1 | |
1384 | */ | |
1385 | static void nfs4_set_lease_expired(struct nfs_client *clp, int status) | |
1386 | { | |
1387 | if (nfs4_has_session(clp)) { | |
1388 | switch (status) { | |
1389 | case -NFS4ERR_DELAY: | |
1390 | case -NFS4ERR_CLID_INUSE: | |
1391 | case -EAGAIN: | |
2c643488 | 1392 | case -EKEYEXPIRED: |
78722e9c AA |
1393 | break; |
1394 | ||
1395 | case -NFS4ERR_NOT_SAME: /* FixMe: implement recovery | |
1396 | * in nfs4_exchange_id */ | |
1397 | default: | |
1398 | return; | |
1399 | } | |
1400 | } | |
1401 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1402 | } | |
1403 | ||
e005e804 | 1404 | static void nfs4_state_manager(struct nfs_client *clp) |
02860014 | 1405 | { |
02860014 TM |
1406 | int status = 0; |
1407 | ||
02860014 | 1408 | /* Ensure exclusive access to NFSv4 state */ |
f3c76491 | 1409 | for(;;) { |
b79a4a1b TM |
1410 | if (test_and_clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) { |
1411 | /* We're going to have to re-establish a clientid */ | |
1412 | status = nfs4_reclaim_lease(clp); | |
1413 | if (status) { | |
78722e9c | 1414 | nfs4_set_lease_expired(clp, status); |
b6d408ba TM |
1415 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, |
1416 | &clp->cl_state)) | |
b79a4a1b | 1417 | continue; |
76db6d95 AA |
1418 | if (clp->cl_cons_state == |
1419 | NFS_CS_SESSION_INITING) | |
1420 | nfs_mark_client_ready(clp, status); | |
b79a4a1b TM |
1421 | goto out_error; |
1422 | } | |
e598d843 | 1423 | clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); |
7cab89b2 | 1424 | set_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state); |
e598d843 TM |
1425 | } |
1426 | ||
1427 | if (test_and_clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state)) { | |
1428 | status = nfs4_check_lease(clp); | |
b6d408ba | 1429 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
e598d843 | 1430 | continue; |
b6d408ba TM |
1431 | if (status < 0 && status != -NFS4ERR_CB_PATH_DOWN) |
1432 | goto out_error; | |
b79a4a1b | 1433 | } |
b6d408ba | 1434 | |
c3fad1b1 | 1435 | /* Initialize or reset the session */ |
6df08189 | 1436 | if (test_and_clear_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state) |
7111dc73 | 1437 | && nfs4_has_session(clp)) { |
4d643d1d | 1438 | status = nfs4_reset_session(clp); |
b6d408ba TM |
1439 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
1440 | continue; | |
1441 | if (status < 0) | |
76db6d95 | 1442 | goto out_error; |
76db6d95 | 1443 | } |
b6d408ba | 1444 | |
b79a4a1b | 1445 | /* First recover reboot state... */ |
e345e88a | 1446 | if (test_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) { |
591d71cb | 1447 | status = nfs4_do_reclaim(clp, |
c48f4f35 | 1448 | clp->cl_mvops->reboot_recovery_ops); |
b6d408ba | 1449 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) || |
6df08189 | 1450 | test_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state)) |
c3fad1b1 | 1451 | continue; |
b79a4a1b | 1452 | nfs4_state_end_reclaim_reboot(clp); |
b6d408ba TM |
1453 | if (test_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) |
1454 | continue; | |
1455 | if (status < 0) | |
1456 | goto out_error; | |
02860014 TM |
1457 | } |
1458 | ||
b79a4a1b TM |
1459 | /* Now recover expired state... */ |
1460 | if (test_and_clear_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) { | |
591d71cb | 1461 | status = nfs4_do_reclaim(clp, |
c48f4f35 | 1462 | clp->cl_mvops->nograce_recovery_ops); |
b6d408ba | 1463 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) || |
6df08189 | 1464 | test_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state) || |
b6d408ba TM |
1465 | test_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) |
1466 | continue; | |
1467 | if (status < 0) | |
b79a4a1b | 1468 | goto out_error; |
1da177e4 | 1469 | } |
707fb4b3 | 1470 | |
5601a00d | 1471 | nfs4_end_drain_session(clp); |
707fb4b3 TM |
1472 | if (test_and_clear_bit(NFS4CLNT_DELEGRETURN, &clp->cl_state)) { |
1473 | nfs_client_return_marked_delegations(clp); | |
1474 | continue; | |
1475 | } | |
b9efa1b2 AA |
1476 | /* Recall session slots */ |
1477 | if (test_and_clear_bit(NFS4CLNT_RECALL_SLOT, &clp->cl_state) | |
1478 | && nfs4_has_session(clp)) { | |
1479 | status = nfs4_recall_slot(clp); | |
1480 | if (status < 0) | |
1481 | goto out_error; | |
1482 | continue; | |
1483 | } | |
1484 | ||
e005e804 TM |
1485 | |
1486 | nfs4_clear_state_manager_bit(clp); | |
f3c76491 TM |
1487 | /* Did we race with an attempt to give us more work? */ |
1488 | if (clp->cl_state == 0) | |
1489 | break; | |
1490 | if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) != 0) | |
1491 | break; | |
1da177e4 | 1492 | } |
e005e804 | 1493 | return; |
1da177e4 | 1494 | out_error: |
e005e804 | 1495 | printk(KERN_WARNING "Error: state manager failed on NFSv4 server %s" |
5d8515ca | 1496 | " with error %d\n", clp->cl_hostname, -status); |
5601a00d | 1497 | nfs4_end_drain_session(clp); |
e005e804 TM |
1498 | nfs4_clear_state_manager_bit(clp); |
1499 | } | |
1500 | ||
1501 | static int nfs4_run_state_manager(void *ptr) | |
1502 | { | |
1503 | struct nfs_client *clp = ptr; | |
1504 | ||
1505 | allow_signal(SIGKILL); | |
1506 | nfs4_state_manager(clp); | |
1507 | nfs_put_client(clp); | |
1508 | module_put_and_exit(0); | |
1509 | return 0; | |
1da177e4 LT |
1510 | } |
1511 | ||
1512 | /* | |
1513 | * Local variables: | |
1514 | * c-basic-offset: 8 | |
1515 | * End: | |
1516 | */ |