Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * fs/nfs/nfs4state.c | |
3 | * | |
4 | * Client-side XDR for NFSv4. | |
5 | * | |
6 | * Copyright (c) 2002 The Regents of the University of Michigan. | |
7 | * All rights reserved. | |
8 | * | |
9 | * Kendrick Smith <kmsmith@umich.edu> | |
10 | * | |
11 | * Redistribution and use in source and binary forms, with or without | |
12 | * modification, are permitted provided that the following conditions | |
13 | * are met: | |
14 | * | |
15 | * 1. Redistributions of source code must retain the above copyright | |
16 | * notice, this list of conditions and the following disclaimer. | |
17 | * 2. Redistributions in binary form must reproduce the above copyright | |
18 | * notice, this list of conditions and the following disclaimer in the | |
19 | * documentation and/or other materials provided with the distribution. | |
20 | * 3. Neither the name of the University nor the names of its | |
21 | * contributors may be used to endorse or promote products derived | |
22 | * from this software without specific prior written permission. | |
23 | * | |
24 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
25 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
26 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
27 | * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
28 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
29 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
30 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR | |
31 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
32 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
33 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
34 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
35 | * | |
36 | * Implementation of the NFSv4 state model. For the time being, | |
37 | * this is minimal, but will be made much more complex in a | |
38 | * subsequent patch. | |
39 | */ | |
40 | ||
6f43ddcc | 41 | #include <linux/kernel.h> |
1da177e4 | 42 | #include <linux/slab.h> |
b89f4321 | 43 | #include <linux/fs.h> |
1da177e4 LT |
44 | #include <linux/nfs_fs.h> |
45 | #include <linux/nfs_idmap.h> | |
5043e900 TM |
46 | #include <linux/kthread.h> |
47 | #include <linux/module.h> | |
9f958ab8 | 48 | #include <linux/random.h> |
8c7597f6 | 49 | #include <linux/ratelimit.h> |
1da177e4 LT |
50 | #include <linux/workqueue.h> |
51 | #include <linux/bitops.h> | |
0aaaf5c4 | 52 | #include <linux/jiffies.h> |
1da177e4 | 53 | |
4ce79717 | 54 | #include "nfs4_fs.h" |
1da177e4 LT |
55 | #include "callback.h" |
56 | #include "delegation.h" | |
24c8dbbb | 57 | #include "internal.h" |
974cec8c | 58 | #include "pnfs.h" |
1da177e4 LT |
59 | |
60 | #define OPENOWNER_POOL_SIZE 8 | |
61 | ||
4ce79717 | 62 | const nfs4_stateid zero_stateid; |
1da177e4 LT |
63 | |
64 | static LIST_HEAD(nfs4_clientid_list); | |
65 | ||
591d71cb | 66 | int nfs4_init_clientid(struct nfs_client *clp, struct rpc_cred *cred) |
1da177e4 | 67 | { |
fd954ae1 TM |
68 | struct nfs4_setclientid_res clid = { |
69 | .clientid = clp->cl_clientid, | |
70 | .confirm = clp->cl_confirm, | |
71 | }; | |
f738f517 CL |
72 | unsigned short port; |
73 | int status; | |
74 | ||
fd954ae1 TM |
75 | if (test_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state)) |
76 | goto do_confirm; | |
f738f517 CL |
77 | port = nfs_callback_tcpport; |
78 | if (clp->cl_addr.ss_family == AF_INET6) | |
79 | port = nfs_callback_tcpport6; | |
80 | ||
bb8b27e5 TM |
81 | status = nfs4_proc_setclientid(clp, NFS4_CALLBACK, port, cred, &clid); |
82 | if (status != 0) | |
83 | goto out; | |
fd954ae1 TM |
84 | clp->cl_clientid = clid.clientid; |
85 | clp->cl_confirm = clid.confirm; | |
86 | set_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); | |
87 | do_confirm: | |
bb8b27e5 TM |
88 | status = nfs4_proc_setclientid_confirm(clp, &clid, cred); |
89 | if (status != 0) | |
90 | goto out; | |
fd954ae1 | 91 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
bb8b27e5 TM |
92 | nfs4_schedule_state_renewal(clp); |
93 | out: | |
1da177e4 LT |
94 | return status; |
95 | } | |
96 | ||
a7b72103 | 97 | struct rpc_cred *nfs4_get_machine_cred_locked(struct nfs_client *clp) |
a2b2bb88 TM |
98 | { |
99 | struct rpc_cred *cred = NULL; | |
100 | ||
a2b2bb88 TM |
101 | if (clp->cl_machine_cred != NULL) |
102 | cred = get_rpccred(clp->cl_machine_cred); | |
a2b2bb88 TM |
103 | return cred; |
104 | } | |
105 | ||
106 | static void nfs4_clear_machine_cred(struct nfs_client *clp) | |
107 | { | |
108 | struct rpc_cred *cred; | |
109 | ||
110 | spin_lock(&clp->cl_lock); | |
111 | cred = clp->cl_machine_cred; | |
112 | clp->cl_machine_cred = NULL; | |
113 | spin_unlock(&clp->cl_lock); | |
114 | if (cred != NULL) | |
115 | put_rpccred(cred); | |
116 | } | |
117 | ||
24d292b8 CL |
118 | static struct rpc_cred * |
119 | nfs4_get_renew_cred_server_locked(struct nfs_server *server) | |
b4454fe1 | 120 | { |
24d292b8 | 121 | struct rpc_cred *cred = NULL; |
b4454fe1 | 122 | struct nfs4_state_owner *sp; |
9f958ab8 | 123 | struct rb_node *pos; |
b4454fe1 | 124 | |
24d292b8 CL |
125 | for (pos = rb_first(&server->state_owners); |
126 | pos != NULL; | |
127 | pos = rb_next(pos)) { | |
128 | sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); | |
b4454fe1 TM |
129 | if (list_empty(&sp->so_states)) |
130 | continue; | |
131 | cred = get_rpccred(sp->so_cred); | |
132 | break; | |
133 | } | |
134 | return cred; | |
135 | } | |
136 | ||
24d292b8 CL |
137 | /** |
138 | * nfs4_get_renew_cred_locked - Acquire credential for a renew operation | |
139 | * @clp: client state handle | |
140 | * | |
141 | * Returns an rpc_cred with reference count bumped, or NULL. | |
142 | * Caller must hold clp->cl_lock. | |
143 | */ | |
144 | struct rpc_cred *nfs4_get_renew_cred_locked(struct nfs_client *clp) | |
145 | { | |
146 | struct rpc_cred *cred = NULL; | |
147 | struct nfs_server *server; | |
148 | ||
e49a29bd SP |
149 | /* Use machine credentials if available */ |
150 | cred = nfs4_get_machine_cred_locked(clp); | |
151 | if (cred != NULL) | |
152 | goto out; | |
153 | ||
24d292b8 CL |
154 | rcu_read_lock(); |
155 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { | |
156 | cred = nfs4_get_renew_cred_server_locked(server); | |
157 | if (cred != NULL) | |
158 | break; | |
159 | } | |
160 | rcu_read_unlock(); | |
e49a29bd SP |
161 | |
162 | out: | |
24d292b8 CL |
163 | return cred; |
164 | } | |
165 | ||
b4b82607 AA |
166 | #if defined(CONFIG_NFS_V4_1) |
167 | ||
9430fb6b RL |
168 | static int nfs41_setup_state_renewal(struct nfs_client *clp) |
169 | { | |
170 | int status; | |
171 | struct nfs_fsinfo fsinfo; | |
172 | ||
d6fb79d4 AA |
173 | if (!test_bit(NFS_CS_CHECK_LEASE_TIME, &clp->cl_res_state)) { |
174 | nfs4_schedule_state_renewal(clp); | |
175 | return 0; | |
176 | } | |
177 | ||
9430fb6b RL |
178 | status = nfs4_proc_get_lease_time(clp, &fsinfo); |
179 | if (status == 0) { | |
180 | /* Update lease time and schedule renewal */ | |
181 | spin_lock(&clp->cl_lock); | |
182 | clp->cl_lease_time = fsinfo.lease_time * HZ; | |
183 | clp->cl_last_renewal = jiffies; | |
184 | spin_unlock(&clp->cl_lock); | |
185 | ||
186 | nfs4_schedule_state_renewal(clp); | |
187 | } | |
188 | ||
189 | return status; | |
190 | } | |
191 | ||
42acd021 AA |
192 | /* |
193 | * Back channel returns NFS4ERR_DELAY for new requests when | |
194 | * NFS4_SESSION_DRAINING is set so there is no work to be done when draining | |
195 | * is ended. | |
196 | */ | |
5601a00d | 197 | static void nfs4_end_drain_session(struct nfs_client *clp) |
9dfdf404 | 198 | { |
5601a00d | 199 | struct nfs4_session *ses = clp->cl_session; |
961a828d | 200 | struct nfs4_slot_table *tbl; |
689cf5c1 AB |
201 | int max_slots; |
202 | ||
a2118c33 TM |
203 | if (ses == NULL) |
204 | return; | |
961a828d | 205 | tbl = &ses->fc_slot_table; |
a2118c33 | 206 | if (test_and_clear_bit(NFS4_SESSION_DRAINING, &ses->session_state)) { |
961a828d TM |
207 | spin_lock(&tbl->slot_tbl_lock); |
208 | max_slots = tbl->max_slots; | |
689cf5c1 | 209 | while (max_slots--) { |
961a828d TM |
210 | if (rpc_wake_up_first(&tbl->slot_tbl_waitq, |
211 | nfs4_set_task_privileged, | |
212 | NULL) == NULL) | |
689cf5c1 | 213 | break; |
689cf5c1 | 214 | } |
961a828d | 215 | spin_unlock(&tbl->slot_tbl_lock); |
689cf5c1 | 216 | } |
9dfdf404 RL |
217 | } |
218 | ||
42acd021 | 219 | static int nfs4_wait_on_slot_tbl(struct nfs4_slot_table *tbl) |
9dfdf404 | 220 | { |
9dfdf404 | 221 | spin_lock(&tbl->slot_tbl_lock); |
b6bf6e7d | 222 | if (tbl->highest_used_slotid != NFS4_NO_SLOT) { |
42acd021 | 223 | INIT_COMPLETION(tbl->complete); |
9dfdf404 | 224 | spin_unlock(&tbl->slot_tbl_lock); |
42acd021 | 225 | return wait_for_completion_interruptible(&tbl->complete); |
9dfdf404 RL |
226 | } |
227 | spin_unlock(&tbl->slot_tbl_lock); | |
228 | return 0; | |
229 | } | |
230 | ||
42acd021 AA |
231 | static int nfs4_begin_drain_session(struct nfs_client *clp) |
232 | { | |
233 | struct nfs4_session *ses = clp->cl_session; | |
234 | int ret = 0; | |
235 | ||
236 | set_bit(NFS4_SESSION_DRAINING, &ses->session_state); | |
237 | /* back channel */ | |
238 | ret = nfs4_wait_on_slot_tbl(&ses->bc_slot_table); | |
239 | if (ret) | |
240 | return ret; | |
241 | /* fore channel */ | |
242 | return nfs4_wait_on_slot_tbl(&ses->fc_slot_table); | |
243 | } | |
244 | ||
4d643d1d AA |
245 | int nfs41_init_clientid(struct nfs_client *clp, struct rpc_cred *cred) |
246 | { | |
247 | int status; | |
248 | ||
fd954ae1 TM |
249 | if (test_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state)) |
250 | goto do_confirm; | |
38045412 | 251 | nfs4_begin_drain_session(clp); |
4d643d1d | 252 | status = nfs4_proc_exchange_id(clp, cred); |
9430fb6b RL |
253 | if (status != 0) |
254 | goto out; | |
fd954ae1 TM |
255 | set_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
256 | do_confirm: | |
9430fb6b RL |
257 | status = nfs4_proc_create_session(clp); |
258 | if (status != 0) | |
259 | goto out; | |
fd954ae1 | 260 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
9430fb6b RL |
261 | nfs41_setup_state_renewal(clp); |
262 | nfs_mark_client_ready(clp, NFS_CS_READY); | |
263 | out: | |
4d643d1d AA |
264 | return status; |
265 | } | |
266 | ||
b4b82607 AA |
267 | struct rpc_cred *nfs4_get_exchange_id_cred(struct nfs_client *clp) |
268 | { | |
269 | struct rpc_cred *cred; | |
270 | ||
271 | spin_lock(&clp->cl_lock); | |
272 | cred = nfs4_get_machine_cred_locked(clp); | |
273 | spin_unlock(&clp->cl_lock); | |
274 | return cred; | |
275 | } | |
276 | ||
277 | #endif /* CONFIG_NFS_V4_1 */ | |
278 | ||
24d292b8 CL |
279 | static struct rpc_cred * |
280 | nfs4_get_setclientid_cred_server(struct nfs_server *server) | |
286d7d6a | 281 | { |
24d292b8 CL |
282 | struct nfs_client *clp = server->nfs_client; |
283 | struct rpc_cred *cred = NULL; | |
286d7d6a | 284 | struct nfs4_state_owner *sp; |
9f958ab8 | 285 | struct rb_node *pos; |
24d292b8 CL |
286 | |
287 | spin_lock(&clp->cl_lock); | |
288 | pos = rb_first(&server->state_owners); | |
289 | if (pos != NULL) { | |
290 | sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); | |
291 | cred = get_rpccred(sp->so_cred); | |
292 | } | |
293 | spin_unlock(&clp->cl_lock); | |
294 | return cred; | |
295 | } | |
296 | ||
297 | /** | |
298 | * nfs4_get_setclientid_cred - Acquire credential for a setclientid operation | |
299 | * @clp: client state handle | |
300 | * | |
301 | * Returns an rpc_cred with reference count bumped, or NULL. | |
302 | */ | |
303 | struct rpc_cred *nfs4_get_setclientid_cred(struct nfs_client *clp) | |
304 | { | |
305 | struct nfs_server *server; | |
a2b2bb88 | 306 | struct rpc_cred *cred; |
286d7d6a | 307 | |
6dc9d57a TM |
308 | spin_lock(&clp->cl_lock); |
309 | cred = nfs4_get_machine_cred_locked(clp); | |
24d292b8 | 310 | spin_unlock(&clp->cl_lock); |
a2b2bb88 TM |
311 | if (cred != NULL) |
312 | goto out; | |
24d292b8 CL |
313 | |
314 | rcu_read_lock(); | |
315 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { | |
316 | cred = nfs4_get_setclientid_cred_server(server); | |
317 | if (cred != NULL) | |
318 | break; | |
286d7d6a | 319 | } |
24d292b8 CL |
320 | rcu_read_unlock(); |
321 | ||
a2b2bb88 TM |
322 | out: |
323 | return cred; | |
286d7d6a TM |
324 | } |
325 | ||
1da177e4 | 326 | static struct nfs4_state_owner * |
24d292b8 | 327 | nfs4_find_state_owner_locked(struct nfs_server *server, struct rpc_cred *cred) |
1da177e4 | 328 | { |
24d292b8 | 329 | struct rb_node **p = &server->state_owners.rb_node, |
9f958ab8 | 330 | *parent = NULL; |
414adf14 | 331 | struct nfs4_state_owner *sp; |
1da177e4 | 332 | |
9f958ab8 TM |
333 | while (*p != NULL) { |
334 | parent = *p; | |
24d292b8 | 335 | sp = rb_entry(parent, struct nfs4_state_owner, so_server_node); |
9f958ab8 TM |
336 | |
337 | if (cred < sp->so_cred) | |
338 | p = &parent->rb_left; | |
339 | else if (cred > sp->so_cred) | |
340 | p = &parent->rb_right; | |
341 | else { | |
0aaaf5c4 CL |
342 | if (!list_empty(&sp->so_lru)) |
343 | list_del_init(&sp->so_lru); | |
9f958ab8 | 344 | atomic_inc(&sp->so_count); |
414adf14 | 345 | return sp; |
9f958ab8 | 346 | } |
1da177e4 | 347 | } |
414adf14 | 348 | return NULL; |
1da177e4 LT |
349 | } |
350 | ||
9f958ab8 | 351 | static struct nfs4_state_owner * |
24d292b8 | 352 | nfs4_insert_state_owner_locked(struct nfs4_state_owner *new) |
9f958ab8 | 353 | { |
24d292b8 CL |
354 | struct nfs_server *server = new->so_server; |
355 | struct rb_node **p = &server->state_owners.rb_node, | |
9f958ab8 TM |
356 | *parent = NULL; |
357 | struct nfs4_state_owner *sp; | |
9157c31d | 358 | int err; |
9f958ab8 TM |
359 | |
360 | while (*p != NULL) { | |
361 | parent = *p; | |
24d292b8 | 362 | sp = rb_entry(parent, struct nfs4_state_owner, so_server_node); |
9f958ab8 TM |
363 | |
364 | if (new->so_cred < sp->so_cred) | |
365 | p = &parent->rb_left; | |
366 | else if (new->so_cred > sp->so_cred) | |
367 | p = &parent->rb_right; | |
368 | else { | |
0aaaf5c4 CL |
369 | if (!list_empty(&sp->so_lru)) |
370 | list_del_init(&sp->so_lru); | |
9f958ab8 TM |
371 | atomic_inc(&sp->so_count); |
372 | return sp; | |
373 | } | |
374 | } | |
48c22eb2 | 375 | err = ida_get_new(&server->openowner_id, &new->so_seqid.owner_id); |
9157c31d TM |
376 | if (err) |
377 | return ERR_PTR(err); | |
24d292b8 CL |
378 | rb_link_node(&new->so_server_node, parent, p); |
379 | rb_insert_color(&new->so_server_node, &server->state_owners); | |
9f958ab8 TM |
380 | return new; |
381 | } | |
382 | ||
383 | static void | |
24d292b8 | 384 | nfs4_remove_state_owner_locked(struct nfs4_state_owner *sp) |
9f958ab8 | 385 | { |
24d292b8 CL |
386 | struct nfs_server *server = sp->so_server; |
387 | ||
388 | if (!RB_EMPTY_NODE(&sp->so_server_node)) | |
389 | rb_erase(&sp->so_server_node, &server->state_owners); | |
48c22eb2 | 390 | ida_remove(&server->openowner_id, sp->so_seqid.owner_id); |
9f958ab8 TM |
391 | } |
392 | ||
7ba127ab TM |
393 | static void |
394 | nfs4_init_seqid_counter(struct nfs_seqid_counter *sc) | |
395 | { | |
95b72eb0 | 396 | sc->create_time = ktime_get(); |
7ba127ab TM |
397 | sc->flags = 0; |
398 | sc->counter = 0; | |
399 | spin_lock_init(&sc->lock); | |
400 | INIT_LIST_HEAD(&sc->list); | |
401 | rpc_init_wait_queue(&sc->wait, "Seqid_waitqueue"); | |
402 | } | |
403 | ||
404 | static void | |
405 | nfs4_destroy_seqid_counter(struct nfs_seqid_counter *sc) | |
406 | { | |
407 | rpc_destroy_wait_queue(&sc->wait); | |
408 | } | |
409 | ||
1da177e4 LT |
410 | /* |
411 | * nfs4_alloc_state_owner(): this is called on the OPEN or CREATE path to | |
412 | * create a new state_owner. | |
413 | * | |
414 | */ | |
415 | static struct nfs4_state_owner * | |
d1e284d5 TM |
416 | nfs4_alloc_state_owner(struct nfs_server *server, |
417 | struct rpc_cred *cred, | |
418 | gfp_t gfp_flags) | |
1da177e4 LT |
419 | { |
420 | struct nfs4_state_owner *sp; | |
421 | ||
d1e284d5 | 422 | sp = kzalloc(sizeof(*sp), gfp_flags); |
1da177e4 LT |
423 | if (!sp) |
424 | return NULL; | |
d1e284d5 TM |
425 | sp->so_server = server; |
426 | sp->so_cred = get_rpccred(cred); | |
ec073428 | 427 | spin_lock_init(&sp->so_lock); |
1da177e4 | 428 | INIT_LIST_HEAD(&sp->so_states); |
7ba127ab | 429 | nfs4_init_seqid_counter(&sp->so_seqid); |
1da177e4 | 430 | atomic_set(&sp->so_count, 1); |
0aaaf5c4 | 431 | INIT_LIST_HEAD(&sp->so_lru); |
1da177e4 LT |
432 | return sp; |
433 | } | |
434 | ||
1d2e88e7 | 435 | static void |
1da177e4 LT |
436 | nfs4_drop_state_owner(struct nfs4_state_owner *sp) |
437 | { | |
c77365c9 TM |
438 | struct rb_node *rb_node = &sp->so_server_node; |
439 | ||
440 | if (!RB_EMPTY_NODE(rb_node)) { | |
24d292b8 CL |
441 | struct nfs_server *server = sp->so_server; |
442 | struct nfs_client *clp = server->nfs_client; | |
9f958ab8 TM |
443 | |
444 | spin_lock(&clp->cl_lock); | |
c77365c9 TM |
445 | if (!RB_EMPTY_NODE(rb_node)) { |
446 | rb_erase(rb_node, &server->state_owners); | |
447 | RB_CLEAR_NODE(rb_node); | |
448 | } | |
9f958ab8 TM |
449 | spin_unlock(&clp->cl_lock); |
450 | } | |
1da177e4 LT |
451 | } |
452 | ||
0aaaf5c4 CL |
453 | static void nfs4_free_state_owner(struct nfs4_state_owner *sp) |
454 | { | |
7ba127ab | 455 | nfs4_destroy_seqid_counter(&sp->so_seqid); |
0aaaf5c4 CL |
456 | put_rpccred(sp->so_cred); |
457 | kfree(sp); | |
458 | } | |
459 | ||
460 | static void nfs4_gc_state_owners(struct nfs_server *server) | |
461 | { | |
462 | struct nfs_client *clp = server->nfs_client; | |
463 | struct nfs4_state_owner *sp, *tmp; | |
464 | unsigned long time_min, time_max; | |
465 | LIST_HEAD(doomed); | |
466 | ||
467 | spin_lock(&clp->cl_lock); | |
468 | time_max = jiffies; | |
469 | time_min = (long)time_max - (long)clp->cl_lease_time; | |
470 | list_for_each_entry_safe(sp, tmp, &server->state_owners_lru, so_lru) { | |
471 | /* NB: LRU is sorted so that oldest is at the head */ | |
472 | if (time_in_range(sp->so_expires, time_min, time_max)) | |
473 | break; | |
474 | list_move(&sp->so_lru, &doomed); | |
475 | nfs4_remove_state_owner_locked(sp); | |
476 | } | |
477 | spin_unlock(&clp->cl_lock); | |
478 | ||
479 | list_for_each_entry_safe(sp, tmp, &doomed, so_lru) { | |
480 | list_del(&sp->so_lru); | |
481 | nfs4_free_state_owner(sp); | |
482 | } | |
483 | } | |
484 | ||
24d292b8 CL |
485 | /** |
486 | * nfs4_get_state_owner - Look up a state owner given a credential | |
487 | * @server: nfs_server to search | |
488 | * @cred: RPC credential to match | |
489 | * | |
490 | * Returns a pointer to an instantiated nfs4_state_owner struct, or NULL. | |
491 | */ | |
492 | struct nfs4_state_owner *nfs4_get_state_owner(struct nfs_server *server, | |
d1e284d5 TM |
493 | struct rpc_cred *cred, |
494 | gfp_t gfp_flags) | |
1da177e4 | 495 | { |
7539bbab | 496 | struct nfs_client *clp = server->nfs_client; |
1da177e4 LT |
497 | struct nfs4_state_owner *sp, *new; |
498 | ||
1da177e4 | 499 | spin_lock(&clp->cl_lock); |
24d292b8 | 500 | sp = nfs4_find_state_owner_locked(server, cred); |
1da177e4 | 501 | spin_unlock(&clp->cl_lock); |
1da177e4 | 502 | if (sp != NULL) |
0aaaf5c4 | 503 | goto out; |
d1e284d5 | 504 | new = nfs4_alloc_state_owner(server, cred, gfp_flags); |
9f958ab8 | 505 | if (new == NULL) |
0aaaf5c4 | 506 | goto out; |
9157c31d TM |
507 | do { |
508 | if (ida_pre_get(&server->openowner_id, gfp_flags) == 0) | |
509 | break; | |
510 | spin_lock(&clp->cl_lock); | |
511 | sp = nfs4_insert_state_owner_locked(new); | |
512 | spin_unlock(&clp->cl_lock); | |
513 | } while (sp == ERR_PTR(-EAGAIN)); | |
d1e284d5 TM |
514 | if (sp != new) |
515 | nfs4_free_state_owner(new); | |
0aaaf5c4 CL |
516 | out: |
517 | nfs4_gc_state_owners(server); | |
9f958ab8 | 518 | return sp; |
1da177e4 LT |
519 | } |
520 | ||
24d292b8 CL |
521 | /** |
522 | * nfs4_put_state_owner - Release a nfs4_state_owner | |
523 | * @sp: state owner data to release | |
24d292b8 | 524 | */ |
1da177e4 LT |
525 | void nfs4_put_state_owner(struct nfs4_state_owner *sp) |
526 | { | |
0aaaf5c4 CL |
527 | struct nfs_server *server = sp->so_server; |
528 | struct nfs_client *clp = server->nfs_client; | |
1da177e4 LT |
529 | |
530 | if (!atomic_dec_and_lock(&sp->so_count, &clp->cl_lock)) | |
531 | return; | |
0aaaf5c4 CL |
532 | |
533 | if (!RB_EMPTY_NODE(&sp->so_server_node)) { | |
534 | sp->so_expires = jiffies; | |
535 | list_add_tail(&sp->so_lru, &server->state_owners_lru); | |
536 | spin_unlock(&clp->cl_lock); | |
537 | } else { | |
538 | nfs4_remove_state_owner_locked(sp); | |
539 | spin_unlock(&clp->cl_lock); | |
540 | nfs4_free_state_owner(sp); | |
541 | } | |
542 | } | |
543 | ||
544 | /** | |
545 | * nfs4_purge_state_owners - Release all cached state owners | |
546 | * @server: nfs_server with cached state owners to release | |
547 | * | |
548 | * Called at umount time. Remaining state owners will be on | |
549 | * the LRU with ref count of zero. | |
550 | */ | |
551 | void nfs4_purge_state_owners(struct nfs_server *server) | |
552 | { | |
553 | struct nfs_client *clp = server->nfs_client; | |
554 | struct nfs4_state_owner *sp, *tmp; | |
555 | LIST_HEAD(doomed); | |
556 | ||
557 | spin_lock(&clp->cl_lock); | |
558 | list_for_each_entry_safe(sp, tmp, &server->state_owners_lru, so_lru) { | |
559 | list_move(&sp->so_lru, &doomed); | |
560 | nfs4_remove_state_owner_locked(sp); | |
561 | } | |
1da177e4 | 562 | spin_unlock(&clp->cl_lock); |
0aaaf5c4 CL |
563 | |
564 | list_for_each_entry_safe(sp, tmp, &doomed, so_lru) { | |
565 | list_del(&sp->so_lru); | |
566 | nfs4_free_state_owner(sp); | |
567 | } | |
1da177e4 LT |
568 | } |
569 | ||
570 | static struct nfs4_state * | |
571 | nfs4_alloc_open_state(void) | |
572 | { | |
573 | struct nfs4_state *state; | |
574 | ||
8535b2be | 575 | state = kzalloc(sizeof(*state), GFP_NOFS); |
1da177e4 LT |
576 | if (!state) |
577 | return NULL; | |
1da177e4 LT |
578 | atomic_set(&state->count, 1); |
579 | INIT_LIST_HEAD(&state->lock_states); | |
8d0a8a9d | 580 | spin_lock_init(&state->state_lock); |
8bda4e4c | 581 | seqlock_init(&state->seqlock); |
1da177e4 LT |
582 | return state; |
583 | } | |
584 | ||
4cecb76f | 585 | void |
dc0b027d | 586 | nfs4_state_set_mode_locked(struct nfs4_state *state, fmode_t fmode) |
4cecb76f | 587 | { |
dc0b027d | 588 | if (state->state == fmode) |
4cecb76f TM |
589 | return; |
590 | /* NB! List reordering - see the reclaim code for why. */ | |
dc0b027d TM |
591 | if ((fmode & FMODE_WRITE) != (state->state & FMODE_WRITE)) { |
592 | if (fmode & FMODE_WRITE) | |
4cecb76f TM |
593 | list_move(&state->open_states, &state->owner->so_states); |
594 | else | |
595 | list_move_tail(&state->open_states, &state->owner->so_states); | |
596 | } | |
dc0b027d | 597 | state->state = fmode; |
4cecb76f TM |
598 | } |
599 | ||
1da177e4 LT |
600 | static struct nfs4_state * |
601 | __nfs4_find_state_byowner(struct inode *inode, struct nfs4_state_owner *owner) | |
602 | { | |
603 | struct nfs_inode *nfsi = NFS_I(inode); | |
604 | struct nfs4_state *state; | |
605 | ||
606 | list_for_each_entry(state, &nfsi->open_states, inode_states) { | |
1c816efa | 607 | if (state->owner != owner) |
1da177e4 | 608 | continue; |
1c816efa | 609 | if (atomic_inc_not_zero(&state->count)) |
1da177e4 | 610 | return state; |
1da177e4 LT |
611 | } |
612 | return NULL; | |
613 | } | |
614 | ||
1da177e4 LT |
615 | static void |
616 | nfs4_free_open_state(struct nfs4_state *state) | |
617 | { | |
618 | kfree(state); | |
619 | } | |
620 | ||
621 | struct nfs4_state * | |
622 | nfs4_get_open_state(struct inode *inode, struct nfs4_state_owner *owner) | |
623 | { | |
624 | struct nfs4_state *state, *new; | |
625 | struct nfs_inode *nfsi = NFS_I(inode); | |
626 | ||
627 | spin_lock(&inode->i_lock); | |
628 | state = __nfs4_find_state_byowner(inode, owner); | |
629 | spin_unlock(&inode->i_lock); | |
630 | if (state) | |
631 | goto out; | |
632 | new = nfs4_alloc_open_state(); | |
ec073428 | 633 | spin_lock(&owner->so_lock); |
1da177e4 LT |
634 | spin_lock(&inode->i_lock); |
635 | state = __nfs4_find_state_byowner(inode, owner); | |
636 | if (state == NULL && new != NULL) { | |
637 | state = new; | |
1da177e4 LT |
638 | state->owner = owner; |
639 | atomic_inc(&owner->so_count); | |
640 | list_add(&state->inode_states, &nfsi->open_states); | |
0444d76a DC |
641 | ihold(inode); |
642 | state->inode = inode; | |
1da177e4 | 643 | spin_unlock(&inode->i_lock); |
ec073428 TM |
644 | /* Note: The reclaim code dictates that we add stateless |
645 | * and read-only stateids to the end of the list */ | |
646 | list_add_tail(&state->open_states, &owner->so_states); | |
647 | spin_unlock(&owner->so_lock); | |
1da177e4 LT |
648 | } else { |
649 | spin_unlock(&inode->i_lock); | |
ec073428 | 650 | spin_unlock(&owner->so_lock); |
1da177e4 LT |
651 | if (new) |
652 | nfs4_free_open_state(new); | |
653 | } | |
654 | out: | |
655 | return state; | |
656 | } | |
657 | ||
1da177e4 LT |
658 | void nfs4_put_open_state(struct nfs4_state *state) |
659 | { | |
660 | struct inode *inode = state->inode; | |
661 | struct nfs4_state_owner *owner = state->owner; | |
662 | ||
ec073428 | 663 | if (!atomic_dec_and_lock(&state->count, &owner->so_lock)) |
1da177e4 | 664 | return; |
ec073428 | 665 | spin_lock(&inode->i_lock); |
ba683031 | 666 | list_del(&state->inode_states); |
1da177e4 | 667 | list_del(&state->open_states); |
ec073428 TM |
668 | spin_unlock(&inode->i_lock); |
669 | spin_unlock(&owner->so_lock); | |
1da177e4 | 670 | iput(inode); |
1da177e4 LT |
671 | nfs4_free_open_state(state); |
672 | nfs4_put_state_owner(owner); | |
673 | } | |
674 | ||
675 | /* | |
83c9d41e | 676 | * Close the current file. |
1da177e4 | 677 | */ |
643168c2 | 678 | static void __nfs4_close(struct nfs4_state *state, |
8535b2be | 679 | fmode_t fmode, gfp_t gfp_mask, int wait) |
1da177e4 | 680 | { |
1da177e4 | 681 | struct nfs4_state_owner *owner = state->owner; |
003707c7 | 682 | int call_close = 0; |
dc0b027d | 683 | fmode_t newstate; |
1da177e4 LT |
684 | |
685 | atomic_inc(&owner->so_count); | |
1da177e4 | 686 | /* Protect against nfs4_find_state() */ |
ec073428 | 687 | spin_lock(&owner->so_lock); |
dc0b027d | 688 | switch (fmode & (FMODE_READ | FMODE_WRITE)) { |
e7616923 TM |
689 | case FMODE_READ: |
690 | state->n_rdonly--; | |
691 | break; | |
692 | case FMODE_WRITE: | |
693 | state->n_wronly--; | |
694 | break; | |
695 | case FMODE_READ|FMODE_WRITE: | |
696 | state->n_rdwr--; | |
697 | } | |
003707c7 | 698 | newstate = FMODE_READ|FMODE_WRITE; |
e7616923 | 699 | if (state->n_rdwr == 0) { |
003707c7 | 700 | if (state->n_rdonly == 0) { |
e7616923 | 701 | newstate &= ~FMODE_READ; |
003707c7 TM |
702 | call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags); |
703 | call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); | |
704 | } | |
705 | if (state->n_wronly == 0) { | |
e7616923 | 706 | newstate &= ~FMODE_WRITE; |
003707c7 TM |
707 | call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags); |
708 | call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); | |
709 | } | |
710 | if (newstate == 0) | |
711 | clear_bit(NFS_DELEGATED_STATE, &state->flags); | |
e7616923 | 712 | } |
003707c7 | 713 | nfs4_state_set_mode_locked(state, newstate); |
ec073428 | 714 | spin_unlock(&owner->so_lock); |
4cecb76f | 715 | |
003707c7 | 716 | if (!call_close) { |
b39e625b TM |
717 | nfs4_put_open_state(state); |
718 | nfs4_put_state_owner(owner); | |
f7e8917a FI |
719 | } else { |
720 | bool roc = pnfs_roc(state->inode); | |
721 | ||
643168c2 | 722 | nfs4_do_close(state, gfp_mask, wait, roc); |
f7e8917a | 723 | } |
a49c3c77 TM |
724 | } |
725 | ||
643168c2 | 726 | void nfs4_close_state(struct nfs4_state *state, fmode_t fmode) |
a49c3c77 | 727 | { |
643168c2 | 728 | __nfs4_close(state, fmode, GFP_NOFS, 0); |
a49c3c77 TM |
729 | } |
730 | ||
643168c2 | 731 | void nfs4_close_sync(struct nfs4_state *state, fmode_t fmode) |
a49c3c77 | 732 | { |
643168c2 | 733 | __nfs4_close(state, fmode, GFP_KERNEL, 1); |
1da177e4 LT |
734 | } |
735 | ||
736 | /* | |
737 | * Search the state->lock_states for an existing lock_owner | |
738 | * that is compatible with current->files | |
739 | */ | |
740 | static struct nfs4_lock_state * | |
77041ed9 | 741 | __nfs4_find_lock_state(struct nfs4_state *state, fl_owner_t fl_owner, pid_t fl_pid, unsigned int type) |
1da177e4 LT |
742 | { |
743 | struct nfs4_lock_state *pos; | |
744 | list_for_each_entry(pos, &state->lock_states, ls_locks) { | |
77041ed9 | 745 | if (type != NFS4_ANY_LOCK_TYPE && pos->ls_owner.lo_type != type) |
1da177e4 | 746 | continue; |
77041ed9 TM |
747 | switch (pos->ls_owner.lo_type) { |
748 | case NFS4_POSIX_LOCK_TYPE: | |
749 | if (pos->ls_owner.lo_u.posix_owner != fl_owner) | |
750 | continue; | |
751 | break; | |
752 | case NFS4_FLOCK_LOCK_TYPE: | |
753 | if (pos->ls_owner.lo_u.flock_owner != fl_pid) | |
754 | continue; | |
755 | } | |
1da177e4 LT |
756 | atomic_inc(&pos->ls_count); |
757 | return pos; | |
758 | } | |
759 | return NULL; | |
760 | } | |
761 | ||
1da177e4 LT |
762 | /* |
763 | * Return a compatible lock_state. If no initialized lock_state structure | |
764 | * exists, return an uninitialized one. | |
765 | * | |
1da177e4 | 766 | */ |
77041ed9 | 767 | 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 |
768 | { |
769 | struct nfs4_lock_state *lsp; | |
24d292b8 | 770 | struct nfs_server *server = state->owner->so_server; |
1da177e4 | 771 | |
8535b2be | 772 | lsp = kzalloc(sizeof(*lsp), GFP_NOFS); |
1da177e4 LT |
773 | if (lsp == NULL) |
774 | return NULL; | |
7ba127ab | 775 | nfs4_init_seqid_counter(&lsp->ls_seqid); |
1da177e4 | 776 | atomic_set(&lsp->ls_count, 1); |
b64aec8d | 777 | lsp->ls_state = state; |
77041ed9 TM |
778 | lsp->ls_owner.lo_type = type; |
779 | switch (lsp->ls_owner.lo_type) { | |
780 | case NFS4_FLOCK_LOCK_TYPE: | |
781 | lsp->ls_owner.lo_u.flock_owner = fl_pid; | |
782 | break; | |
783 | case NFS4_POSIX_LOCK_TYPE: | |
784 | lsp->ls_owner.lo_u.posix_owner = fl_owner; | |
785 | break; | |
786 | default: | |
d2d7ce28 | 787 | goto out_free; |
77041ed9 | 788 | } |
48c22eb2 TM |
789 | lsp->ls_seqid.owner_id = ida_simple_get(&server->lockowner_id, 0, 0, GFP_NOFS); |
790 | if (lsp->ls_seqid.owner_id < 0) | |
d2d7ce28 | 791 | goto out_free; |
8d0a8a9d | 792 | INIT_LIST_HEAD(&lsp->ls_locks); |
1da177e4 | 793 | return lsp; |
d2d7ce28 TM |
794 | out_free: |
795 | kfree(lsp); | |
796 | return NULL; | |
1da177e4 LT |
797 | } |
798 | ||
5ae67c4f | 799 | void nfs4_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp) |
9f958ab8 | 800 | { |
48c22eb2 | 801 | ida_simple_remove(&server->lockowner_id, lsp->ls_seqid.owner_id); |
7ba127ab | 802 | nfs4_destroy_seqid_counter(&lsp->ls_seqid); |
9f958ab8 TM |
803 | kfree(lsp); |
804 | } | |
805 | ||
1da177e4 LT |
806 | /* |
807 | * Return a compatible lock_state. If no initialized lock_state structure | |
808 | * exists, return an uninitialized one. | |
809 | * | |
1da177e4 | 810 | */ |
77041ed9 | 811 | static struct nfs4_lock_state *nfs4_get_lock_state(struct nfs4_state *state, fl_owner_t owner, pid_t pid, unsigned int type) |
1da177e4 | 812 | { |
8d0a8a9d | 813 | struct nfs4_lock_state *lsp, *new = NULL; |
1da177e4 | 814 | |
8d0a8a9d TM |
815 | for(;;) { |
816 | spin_lock(&state->state_lock); | |
77041ed9 | 817 | lsp = __nfs4_find_lock_state(state, owner, pid, type); |
8d0a8a9d TM |
818 | if (lsp != NULL) |
819 | break; | |
820 | if (new != NULL) { | |
8d0a8a9d TM |
821 | list_add(&new->ls_locks, &state->lock_states); |
822 | set_bit(LK_STATE_IN_USE, &state->flags); | |
823 | lsp = new; | |
824 | new = NULL; | |
825 | break; | |
826 | } | |
827 | spin_unlock(&state->state_lock); | |
77041ed9 | 828 | new = nfs4_alloc_lock_state(state, owner, pid, type); |
8d0a8a9d TM |
829 | if (new == NULL) |
830 | return NULL; | |
831 | } | |
832 | spin_unlock(&state->state_lock); | |
9f958ab8 | 833 | if (new != NULL) |
5ae67c4f | 834 | nfs4_free_lock_state(state->owner->so_server, new); |
1da177e4 LT |
835 | return lsp; |
836 | } | |
837 | ||
838 | /* | |
8d0a8a9d TM |
839 | * Release reference to lock_state, and free it if we see that |
840 | * it is no longer in use | |
1da177e4 | 841 | */ |
faf5f49c | 842 | void nfs4_put_lock_state(struct nfs4_lock_state *lsp) |
1da177e4 | 843 | { |
8d0a8a9d | 844 | struct nfs4_state *state; |
1da177e4 | 845 | |
8d0a8a9d TM |
846 | if (lsp == NULL) |
847 | return; | |
848 | state = lsp->ls_state; | |
849 | if (!atomic_dec_and_lock(&lsp->ls_count, &state->state_lock)) | |
850 | return; | |
851 | list_del(&lsp->ls_locks); | |
852 | if (list_empty(&state->lock_states)) | |
853 | clear_bit(LK_STATE_IN_USE, &state->flags); | |
854 | spin_unlock(&state->state_lock); | |
cf470c3e TM |
855 | if (lsp->ls_flags & NFS_LOCK_INITIALIZED) { |
856 | if (nfs4_release_lockowner(lsp) == 0) | |
857 | return; | |
858 | } | |
5ae67c4f | 859 | nfs4_free_lock_state(lsp->ls_state->owner->so_server, lsp); |
1da177e4 LT |
860 | } |
861 | ||
8d0a8a9d | 862 | static void nfs4_fl_copy_lock(struct file_lock *dst, struct file_lock *src) |
1da177e4 | 863 | { |
8d0a8a9d | 864 | struct nfs4_lock_state *lsp = src->fl_u.nfs4_fl.owner; |
1da177e4 | 865 | |
8d0a8a9d TM |
866 | dst->fl_u.nfs4_fl.owner = lsp; |
867 | atomic_inc(&lsp->ls_count); | |
868 | } | |
1da177e4 | 869 | |
8d0a8a9d | 870 | static void nfs4_fl_release_lock(struct file_lock *fl) |
1da177e4 | 871 | { |
8d0a8a9d | 872 | nfs4_put_lock_state(fl->fl_u.nfs4_fl.owner); |
1da177e4 LT |
873 | } |
874 | ||
6aed6285 | 875 | static const struct file_lock_operations nfs4_fl_lock_ops = { |
8d0a8a9d TM |
876 | .fl_copy_lock = nfs4_fl_copy_lock, |
877 | .fl_release_private = nfs4_fl_release_lock, | |
878 | }; | |
879 | ||
880 | int nfs4_set_lock_state(struct nfs4_state *state, struct file_lock *fl) | |
1da177e4 | 881 | { |
8d0a8a9d TM |
882 | struct nfs4_lock_state *lsp; |
883 | ||
884 | if (fl->fl_ops != NULL) | |
885 | return 0; | |
77041ed9 TM |
886 | if (fl->fl_flags & FL_POSIX) |
887 | lsp = nfs4_get_lock_state(state, fl->fl_owner, 0, NFS4_POSIX_LOCK_TYPE); | |
888 | else if (fl->fl_flags & FL_FLOCK) | |
17280175 TM |
889 | lsp = nfs4_get_lock_state(state, NULL, fl->fl_pid, |
890 | NFS4_FLOCK_LOCK_TYPE); | |
77041ed9 TM |
891 | else |
892 | return -EINVAL; | |
8d0a8a9d TM |
893 | if (lsp == NULL) |
894 | return -ENOMEM; | |
895 | fl->fl_u.nfs4_fl.owner = lsp; | |
896 | fl->fl_ops = &nfs4_fl_lock_ops; | |
897 | return 0; | |
1da177e4 LT |
898 | } |
899 | ||
4fc8796d TM |
900 | static bool nfs4_copy_lock_stateid(nfs4_stateid *dst, struct nfs4_state *state, |
901 | fl_owner_t fl_owner, pid_t fl_pid) | |
1da177e4 | 902 | { |
8d0a8a9d | 903 | struct nfs4_lock_state *lsp; |
4fc8796d | 904 | bool ret = false; |
1da177e4 | 905 | |
8d0a8a9d | 906 | if (test_bit(LK_STATE_IN_USE, &state->flags) == 0) |
4fc8796d | 907 | goto out; |
1da177e4 | 908 | |
8d0a8a9d | 909 | spin_lock(&state->state_lock); |
77041ed9 | 910 | lsp = __nfs4_find_lock_state(state, fl_owner, fl_pid, NFS4_ANY_LOCK_TYPE); |
4fc8796d | 911 | if (lsp != NULL && (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0) { |
f597c537 | 912 | nfs4_stateid_copy(dst, &lsp->ls_stateid); |
4fc8796d TM |
913 | ret = true; |
914 | } | |
8d0a8a9d | 915 | spin_unlock(&state->state_lock); |
1da177e4 | 916 | nfs4_put_lock_state(lsp); |
4fc8796d TM |
917 | out: |
918 | return ret; | |
919 | } | |
920 | ||
921 | static void nfs4_copy_open_stateid(nfs4_stateid *dst, struct nfs4_state *state) | |
922 | { | |
923 | int seq; | |
924 | ||
925 | do { | |
926 | seq = read_seqbegin(&state->seqlock); | |
927 | nfs4_stateid_copy(dst, &state->stateid); | |
928 | } while (read_seqretry(&state->seqlock, seq)); | |
929 | } | |
930 | ||
931 | /* | |
932 | * Byte-range lock aware utility to initialize the stateid of read/write | |
933 | * requests. | |
934 | */ | |
935 | void nfs4_select_rw_stateid(nfs4_stateid *dst, struct nfs4_state *state, | |
936 | fmode_t fmode, fl_owner_t fl_owner, pid_t fl_pid) | |
937 | { | |
938 | if (nfs4_copy_delegation_stateid(dst, state->inode, fmode)) | |
939 | return; | |
940 | if (nfs4_copy_lock_stateid(dst, state, fl_owner, fl_pid)) | |
941 | return; | |
942 | nfs4_copy_open_stateid(dst, state); | |
1da177e4 LT |
943 | } |
944 | ||
8535b2be | 945 | struct nfs_seqid *nfs_alloc_seqid(struct nfs_seqid_counter *counter, gfp_t gfp_mask) |
cee54fc9 | 946 | { |
cee54fc9 TM |
947 | struct nfs_seqid *new; |
948 | ||
8535b2be | 949 | new = kmalloc(sizeof(*new), gfp_mask); |
cee54fc9 TM |
950 | if (new != NULL) { |
951 | new->sequence = counter; | |
2f74c0a0 | 952 | INIT_LIST_HEAD(&new->list); |
4601df20 | 953 | new->task = NULL; |
cee54fc9 TM |
954 | } |
955 | return new; | |
956 | } | |
957 | ||
72211dbe | 958 | void nfs_release_seqid(struct nfs_seqid *seqid) |
1da177e4 | 959 | { |
4601df20 | 960 | struct nfs_seqid_counter *sequence; |
cee54fc9 | 961 | |
4601df20 TM |
962 | if (list_empty(&seqid->list)) |
963 | return; | |
964 | sequence = seqid->sequence; | |
965 | spin_lock(&sequence->lock); | |
966 | list_del_init(&seqid->list); | |
967 | if (!list_empty(&sequence->list)) { | |
968 | struct nfs_seqid *next; | |
969 | ||
970 | next = list_first_entry(&sequence->list, | |
971 | struct nfs_seqid, list); | |
972 | rpc_wake_up_queued_task(&sequence->wait, next->task); | |
2f74c0a0 | 973 | } |
4601df20 | 974 | spin_unlock(&sequence->lock); |
72211dbe TM |
975 | } |
976 | ||
977 | void nfs_free_seqid(struct nfs_seqid *seqid) | |
978 | { | |
979 | nfs_release_seqid(seqid); | |
cee54fc9 | 980 | kfree(seqid); |
1da177e4 LT |
981 | } |
982 | ||
983 | /* | |
cee54fc9 TM |
984 | * Increment the seqid if the OPEN/OPEN_DOWNGRADE/CLOSE succeeded, or |
985 | * failed with a seqid incrementing error - | |
986 | * see comments nfs_fs.h:seqid_mutating_error() | |
987 | */ | |
88d90939 | 988 | static void nfs_increment_seqid(int status, struct nfs_seqid *seqid) |
cee54fc9 | 989 | { |
7ba127ab | 990 | BUG_ON(list_first_entry(&seqid->sequence->list, struct nfs_seqid, list) != seqid); |
cee54fc9 TM |
991 | switch (status) { |
992 | case 0: | |
993 | break; | |
994 | case -NFS4ERR_BAD_SEQID: | |
6f43ddcc TM |
995 | if (seqid->sequence->flags & NFS_SEQID_CONFIRMED) |
996 | return; | |
9a3ba432 | 997 | pr_warn_ratelimited("NFS: v4 server returned a bad" |
497799e7 DM |
998 | " sequence-id error on an" |
999 | " unconfirmed sequence %p!\n", | |
6f43ddcc | 1000 | seqid->sequence); |
cee54fc9 TM |
1001 | case -NFS4ERR_STALE_CLIENTID: |
1002 | case -NFS4ERR_STALE_STATEID: | |
1003 | case -NFS4ERR_BAD_STATEID: | |
1004 | case -NFS4ERR_BADXDR: | |
1005 | case -NFS4ERR_RESOURCE: | |
1006 | case -NFS4ERR_NOFILEHANDLE: | |
1007 | /* Non-seqid mutating errors */ | |
1008 | return; | |
1009 | }; | |
1010 | /* | |
1011 | * Note: no locking needed as we are guaranteed to be first | |
1012 | * on the sequence list | |
1013 | */ | |
1014 | seqid->sequence->counter++; | |
1015 | } | |
1016 | ||
1017 | void nfs_increment_open_seqid(int status, struct nfs_seqid *seqid) | |
1018 | { | |
34dc1ad7 BH |
1019 | struct nfs4_state_owner *sp = container_of(seqid->sequence, |
1020 | struct nfs4_state_owner, so_seqid); | |
1021 | struct nfs_server *server = sp->so_server; | |
1022 | ||
1023 | if (status == -NFS4ERR_BAD_SEQID) | |
1da177e4 | 1024 | nfs4_drop_state_owner(sp); |
34dc1ad7 BH |
1025 | if (!nfs4_has_session(server->nfs_client)) |
1026 | nfs_increment_seqid(status, seqid); | |
cee54fc9 TM |
1027 | } |
1028 | ||
1029 | /* | |
cee54fc9 TM |
1030 | * Increment the seqid if the LOCK/LOCKU succeeded, or |
1031 | * failed with a seqid incrementing error - | |
1032 | * see comments nfs_fs.h:seqid_mutating_error() | |
1033 | */ | |
1034 | void nfs_increment_lock_seqid(int status, struct nfs_seqid *seqid) | |
1035 | { | |
88d90939 | 1036 | nfs_increment_seqid(status, seqid); |
cee54fc9 TM |
1037 | } |
1038 | ||
1039 | int nfs_wait_on_sequence(struct nfs_seqid *seqid, struct rpc_task *task) | |
1040 | { | |
7ba127ab | 1041 | struct nfs_seqid_counter *sequence = seqid->sequence; |
cee54fc9 TM |
1042 | int status = 0; |
1043 | ||
1044 | spin_lock(&sequence->lock); | |
4601df20 | 1045 | seqid->task = task; |
2f74c0a0 TM |
1046 | if (list_empty(&seqid->list)) |
1047 | list_add_tail(&seqid->list, &sequence->list); | |
1048 | if (list_first_entry(&sequence->list, struct nfs_seqid, list) == seqid) | |
1049 | goto unlock; | |
5d00837b | 1050 | rpc_sleep_on(&sequence->wait, task, NULL); |
2f74c0a0 TM |
1051 | status = -EAGAIN; |
1052 | unlock: | |
cee54fc9 TM |
1053 | spin_unlock(&sequence->lock); |
1054 | return status; | |
1da177e4 LT |
1055 | } |
1056 | ||
e005e804 | 1057 | static int nfs4_run_state_manager(void *); |
1da177e4 | 1058 | |
e005e804 | 1059 | static void nfs4_clear_state_manager_bit(struct nfs_client *clp) |
433fbe4c TM |
1060 | { |
1061 | smp_mb__before_clear_bit(); | |
e005e804 | 1062 | clear_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state); |
433fbe4c | 1063 | smp_mb__after_clear_bit(); |
e005e804 | 1064 | wake_up_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING); |
433fbe4c TM |
1065 | rpc_wake_up(&clp->cl_rpcwaitq); |
1066 | } | |
1067 | ||
1da177e4 | 1068 | /* |
e005e804 | 1069 | * Schedule the nfs_client asynchronous state management routine |
1da177e4 | 1070 | */ |
b0d3ded1 | 1071 | void nfs4_schedule_state_manager(struct nfs_client *clp) |
1da177e4 | 1072 | { |
5043e900 | 1073 | struct task_struct *task; |
2446ab60 | 1074 | char buf[INET6_ADDRSTRLEN + sizeof("-manager") + 1]; |
1da177e4 | 1075 | |
e005e804 TM |
1076 | if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) != 0) |
1077 | return; | |
5043e900 TM |
1078 | __module_get(THIS_MODULE); |
1079 | atomic_inc(&clp->cl_count); | |
2446ab60 TM |
1080 | |
1081 | /* The rcu_read_lock() is not strictly necessary, as the state | |
1082 | * manager is the only thread that ever changes the rpc_xprt | |
1083 | * after it's initialized. At this point, we're single threaded. */ | |
1084 | rcu_read_lock(); | |
1085 | snprintf(buf, sizeof(buf), "%s-manager", | |
1086 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)); | |
1087 | rcu_read_unlock(); | |
1088 | task = kthread_run(nfs4_run_state_manager, clp, buf); | |
1089 | if (IS_ERR(task)) { | |
1090 | printk(KERN_ERR "%s: kthread_run: %ld\n", | |
1091 | __func__, PTR_ERR(task)); | |
1092 | nfs4_clear_state_manager_bit(clp); | |
1093 | nfs_put_client(clp); | |
1094 | module_put(THIS_MODULE); | |
1095 | } | |
1da177e4 LT |
1096 | } |
1097 | ||
1098 | /* | |
0400a6b0 | 1099 | * Schedule a lease recovery attempt |
1da177e4 | 1100 | */ |
0400a6b0 | 1101 | void nfs4_schedule_lease_recovery(struct nfs_client *clp) |
1da177e4 LT |
1102 | { |
1103 | if (!clp) | |
1104 | return; | |
e598d843 TM |
1105 | if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
1106 | set_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); | |
e005e804 | 1107 | nfs4_schedule_state_manager(clp); |
1da177e4 | 1108 | } |
9cb81968 | 1109 | EXPORT_SYMBOL_GPL(nfs4_schedule_lease_recovery); |
1da177e4 | 1110 | |
ad1e3968 TM |
1111 | /* |
1112 | * nfs40_handle_cb_pathdown - return all delegations after NFS4ERR_CB_PATH_DOWN | |
1113 | * @clp: client to process | |
1114 | * | |
1115 | * Set the NFS4CLNT_LEASE_EXPIRED state in order to force a | |
1116 | * resend of the SETCLIENTID and hence re-establish the | |
1117 | * callback channel. Then return all existing delegations. | |
1118 | */ | |
1119 | static void nfs40_handle_cb_pathdown(struct nfs_client *clp) | |
1120 | { | |
1121 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1122 | nfs_expire_all_delegations(clp); | |
1123 | } | |
1124 | ||
042b60be TM |
1125 | void nfs4_schedule_path_down_recovery(struct nfs_client *clp) |
1126 | { | |
ad1e3968 | 1127 | nfs40_handle_cb_pathdown(clp); |
042b60be TM |
1128 | nfs4_schedule_state_manager(clp); |
1129 | } | |
1130 | ||
f9feab1e | 1131 | static int nfs4_state_mark_reclaim_reboot(struct nfs_client *clp, struct nfs4_state *state) |
b79a4a1b TM |
1132 | { |
1133 | ||
1134 | set_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); | |
1135 | /* Don't recover state that expired before the reboot */ | |
1136 | if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) { | |
1137 | clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); | |
1138 | return 0; | |
1139 | } | |
7eff03ae | 1140 | set_bit(NFS_OWNER_RECLAIM_REBOOT, &state->owner->so_flags); |
b79a4a1b TM |
1141 | set_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state); |
1142 | return 1; | |
1143 | } | |
1144 | ||
f9feab1e | 1145 | static int nfs4_state_mark_reclaim_nograce(struct nfs_client *clp, struct nfs4_state *state) |
b79a4a1b TM |
1146 | { |
1147 | set_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags); | |
1148 | clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); | |
7eff03ae | 1149 | set_bit(NFS_OWNER_RECLAIM_NOGRACE, &state->owner->so_flags); |
b79a4a1b TM |
1150 | set_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state); |
1151 | return 1; | |
1152 | } | |
1153 | ||
0400a6b0 TM |
1154 | void nfs4_schedule_stateid_recovery(const struct nfs_server *server, struct nfs4_state *state) |
1155 | { | |
1156 | struct nfs_client *clp = server->nfs_client; | |
1157 | ||
1158 | nfs4_state_mark_reclaim_nograce(clp, state); | |
1159 | nfs4_schedule_state_manager(clp); | |
1160 | } | |
9cb81968 | 1161 | EXPORT_SYMBOL_GPL(nfs4_schedule_stateid_recovery); |
0400a6b0 | 1162 | |
a1d0b5ee TM |
1163 | void nfs_inode_find_state_and_recover(struct inode *inode, |
1164 | const nfs4_stateid *stateid) | |
1165 | { | |
1166 | struct nfs_client *clp = NFS_SERVER(inode)->nfs_client; | |
1167 | struct nfs_inode *nfsi = NFS_I(inode); | |
1168 | struct nfs_open_context *ctx; | |
1169 | struct nfs4_state *state; | |
1170 | bool found = false; | |
1171 | ||
1172 | spin_lock(&inode->i_lock); | |
1173 | list_for_each_entry(ctx, &nfsi->open_files, list) { | |
1174 | state = ctx->state; | |
1175 | if (state == NULL) | |
1176 | continue; | |
1177 | if (!test_bit(NFS_DELEGATED_STATE, &state->flags)) | |
1178 | continue; | |
f597c537 | 1179 | if (!nfs4_stateid_match(&state->stateid, stateid)) |
a1d0b5ee TM |
1180 | continue; |
1181 | nfs4_state_mark_reclaim_nograce(clp, state); | |
1182 | found = true; | |
1183 | } | |
1184 | spin_unlock(&inode->i_lock); | |
1185 | if (found) | |
1186 | nfs4_schedule_state_manager(clp); | |
1187 | } | |
1188 | ||
1189 | ||
02860014 | 1190 | static int nfs4_reclaim_locks(struct nfs4_state *state, const struct nfs4_state_recovery_ops *ops) |
1da177e4 LT |
1191 | { |
1192 | struct inode *inode = state->inode; | |
19e03c57 | 1193 | struct nfs_inode *nfsi = NFS_I(inode); |
1da177e4 LT |
1194 | struct file_lock *fl; |
1195 | int status = 0; | |
1196 | ||
3f09df70 TM |
1197 | if (inode->i_flock == NULL) |
1198 | return 0; | |
1199 | ||
1200 | /* Guard against delegation returns and new lock/unlock calls */ | |
19e03c57 | 1201 | down_write(&nfsi->rwsem); |
3f09df70 | 1202 | /* Protect inode->i_flock using the BKL */ |
b89f4321 | 1203 | lock_flocks(); |
90dc7d27 | 1204 | for (fl = inode->i_flock; fl != NULL; fl = fl->fl_next) { |
43b2a33a | 1205 | if (!(fl->fl_flags & (FL_POSIX|FL_FLOCK))) |
1da177e4 | 1206 | continue; |
cd3758e3 | 1207 | if (nfs_file_open_context(fl->fl_file)->state != state) |
1da177e4 | 1208 | continue; |
b89f4321 | 1209 | unlock_flocks(); |
1da177e4 | 1210 | status = ops->recover_lock(state, fl); |
1da177e4 | 1211 | switch (status) { |
965b5d67 TM |
1212 | case 0: |
1213 | break; | |
1214 | case -ESTALE: | |
1215 | case -NFS4ERR_ADMIN_REVOKED: | |
1216 | case -NFS4ERR_STALE_STATEID: | |
1217 | case -NFS4ERR_BAD_STATEID: | |
1218 | case -NFS4ERR_EXPIRED: | |
1219 | case -NFS4ERR_NO_GRACE: | |
1220 | case -NFS4ERR_STALE_CLIENTID: | |
9c4c761a TM |
1221 | case -NFS4ERR_BADSESSION: |
1222 | case -NFS4ERR_BADSLOT: | |
1223 | case -NFS4ERR_BAD_HIGH_SLOT: | |
1224 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
965b5d67 | 1225 | goto out; |
1da177e4 | 1226 | default: |
a030889a WAA |
1227 | printk(KERN_ERR "NFS: %s: unhandled error %d. " |
1228 | "Zeroing state\n", __func__, status); | |
965b5d67 TM |
1229 | case -ENOMEM: |
1230 | case -NFS4ERR_DENIED: | |
1da177e4 LT |
1231 | case -NFS4ERR_RECLAIM_BAD: |
1232 | case -NFS4ERR_RECLAIM_CONFLICT: | |
43b2a33a | 1233 | /* kill_proc(fl->fl_pid, SIGLOST, 1); */ |
965b5d67 | 1234 | status = 0; |
1da177e4 | 1235 | } |
b89f4321 | 1236 | lock_flocks(); |
1da177e4 | 1237 | } |
b89f4321 | 1238 | unlock_flocks(); |
965b5d67 | 1239 | out: |
19e03c57 | 1240 | up_write(&nfsi->rwsem); |
1da177e4 LT |
1241 | return status; |
1242 | } | |
1243 | ||
02860014 | 1244 | static int nfs4_reclaim_open_state(struct nfs4_state_owner *sp, const struct nfs4_state_recovery_ops *ops) |
1da177e4 LT |
1245 | { |
1246 | struct nfs4_state *state; | |
1247 | struct nfs4_lock_state *lock; | |
1248 | int status = 0; | |
1249 | ||
1250 | /* Note: we rely on the sp->so_states list being ordered | |
1251 | * so that we always reclaim open(O_RDWR) and/or open(O_WRITE) | |
1252 | * states first. | |
1253 | * This is needed to ensure that the server won't give us any | |
1254 | * read delegations that we have to return if, say, we are | |
1255 | * recovering after a network partition or a reboot from a | |
1256 | * server that doesn't support a grace period. | |
1257 | */ | |
fe1d8195 TM |
1258 | restart: |
1259 | spin_lock(&sp->so_lock); | |
1da177e4 | 1260 | list_for_each_entry(state, &sp->so_states, open_states) { |
b79a4a1b TM |
1261 | if (!test_and_clear_bit(ops->state_flag_bit, &state->flags)) |
1262 | continue; | |
1da177e4 LT |
1263 | if (state->state == 0) |
1264 | continue; | |
fe1d8195 TM |
1265 | atomic_inc(&state->count); |
1266 | spin_unlock(&sp->so_lock); | |
1da177e4 | 1267 | status = ops->recover_open(sp, state); |
1da177e4 | 1268 | if (status >= 0) { |
02860014 TM |
1269 | status = nfs4_reclaim_locks(state, ops); |
1270 | if (status >= 0) { | |
4b44b40e | 1271 | spin_lock(&state->state_lock); |
02860014 TM |
1272 | list_for_each_entry(lock, &state->lock_states, ls_locks) { |
1273 | if (!(lock->ls_flags & NFS_LOCK_INITIALIZED)) | |
96dcadc2 WD |
1274 | pr_warn_ratelimited("NFS: " |
1275 | "%s: Lock reclaim " | |
a030889a | 1276 | "failed!\n", __func__); |
02860014 | 1277 | } |
4b44b40e | 1278 | spin_unlock(&state->state_lock); |
fe1d8195 TM |
1279 | nfs4_put_open_state(state); |
1280 | goto restart; | |
1da177e4 | 1281 | } |
1da177e4 LT |
1282 | } |
1283 | switch (status) { | |
1284 | default: | |
a030889a WAA |
1285 | printk(KERN_ERR "NFS: %s: unhandled error %d. " |
1286 | "Zeroing state\n", __func__, status); | |
1da177e4 | 1287 | case -ENOENT: |
965b5d67 | 1288 | case -ENOMEM: |
b79a4a1b | 1289 | case -ESTALE: |
1da177e4 LT |
1290 | /* |
1291 | * Open state on this file cannot be recovered | |
1292 | * All we can do is revert to using the zero stateid. | |
1293 | */ | |
2d2f24ad TM |
1294 | memset(&state->stateid, 0, |
1295 | sizeof(state->stateid)); | |
1da177e4 LT |
1296 | /* Mark the file as being 'closed' */ |
1297 | state->state = 0; | |
1298 | break; | |
168667c4 TM |
1299 | case -EKEYEXPIRED: |
1300 | /* | |
1301 | * User RPCSEC_GSS context has expired. | |
1302 | * We cannot recover this stateid now, so | |
1303 | * skip it and allow recovery thread to | |
1304 | * proceed. | |
1305 | */ | |
1306 | break; | |
965b5d67 TM |
1307 | case -NFS4ERR_ADMIN_REVOKED: |
1308 | case -NFS4ERR_STALE_STATEID: | |
1309 | case -NFS4ERR_BAD_STATEID: | |
b79a4a1b TM |
1310 | case -NFS4ERR_RECLAIM_BAD: |
1311 | case -NFS4ERR_RECLAIM_CONFLICT: | |
1f0e890d | 1312 | nfs4_state_mark_reclaim_nograce(sp->so_server->nfs_client, state); |
b79a4a1b | 1313 | break; |
1da177e4 LT |
1314 | case -NFS4ERR_EXPIRED: |
1315 | case -NFS4ERR_NO_GRACE: | |
1f0e890d | 1316 | nfs4_state_mark_reclaim_nograce(sp->so_server->nfs_client, state); |
1da177e4 | 1317 | case -NFS4ERR_STALE_CLIENTID: |
9c4c761a TM |
1318 | case -NFS4ERR_BADSESSION: |
1319 | case -NFS4ERR_BADSLOT: | |
1320 | case -NFS4ERR_BAD_HIGH_SLOT: | |
1321 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
1da177e4 LT |
1322 | goto out_err; |
1323 | } | |
fe1d8195 TM |
1324 | nfs4_put_open_state(state); |
1325 | goto restart; | |
1da177e4 | 1326 | } |
fe1d8195 | 1327 | spin_unlock(&sp->so_lock); |
1da177e4 LT |
1328 | return 0; |
1329 | out_err: | |
fe1d8195 | 1330 | nfs4_put_open_state(state); |
1da177e4 LT |
1331 | return status; |
1332 | } | |
1333 | ||
b79a4a1b TM |
1334 | static void nfs4_clear_open_state(struct nfs4_state *state) |
1335 | { | |
1336 | struct nfs4_lock_state *lock; | |
1337 | ||
1338 | clear_bit(NFS_DELEGATED_STATE, &state->flags); | |
1339 | clear_bit(NFS_O_RDONLY_STATE, &state->flags); | |
1340 | clear_bit(NFS_O_WRONLY_STATE, &state->flags); | |
1341 | clear_bit(NFS_O_RDWR_STATE, &state->flags); | |
4b44b40e | 1342 | spin_lock(&state->state_lock); |
b79a4a1b | 1343 | list_for_each_entry(lock, &state->lock_states, ls_locks) { |
b79a4a1b TM |
1344 | lock->ls_seqid.flags = 0; |
1345 | lock->ls_flags &= ~NFS_LOCK_INITIALIZED; | |
1346 | } | |
4b44b40e | 1347 | spin_unlock(&state->state_lock); |
b79a4a1b TM |
1348 | } |
1349 | ||
24d292b8 CL |
1350 | static void nfs4_reset_seqids(struct nfs_server *server, |
1351 | int (*mark_reclaim)(struct nfs_client *clp, struct nfs4_state *state)) | |
cee54fc9 | 1352 | { |
24d292b8 | 1353 | struct nfs_client *clp = server->nfs_client; |
cee54fc9 | 1354 | struct nfs4_state_owner *sp; |
9f958ab8 | 1355 | struct rb_node *pos; |
cee54fc9 | 1356 | struct nfs4_state *state; |
cee54fc9 | 1357 | |
24d292b8 CL |
1358 | spin_lock(&clp->cl_lock); |
1359 | for (pos = rb_first(&server->state_owners); | |
1360 | pos != NULL; | |
1361 | pos = rb_next(pos)) { | |
1362 | sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); | |
cee54fc9 | 1363 | sp->so_seqid.flags = 0; |
ec073428 | 1364 | spin_lock(&sp->so_lock); |
cee54fc9 | 1365 | list_for_each_entry(state, &sp->so_states, open_states) { |
b79a4a1b TM |
1366 | if (mark_reclaim(clp, state)) |
1367 | nfs4_clear_open_state(state); | |
cee54fc9 | 1368 | } |
ec073428 | 1369 | spin_unlock(&sp->so_lock); |
cee54fc9 | 1370 | } |
24d292b8 CL |
1371 | spin_unlock(&clp->cl_lock); |
1372 | } | |
1373 | ||
1374 | static void nfs4_state_mark_reclaim_helper(struct nfs_client *clp, | |
1375 | int (*mark_reclaim)(struct nfs_client *clp, struct nfs4_state *state)) | |
1376 | { | |
1377 | struct nfs_server *server; | |
1378 | ||
1379 | rcu_read_lock(); | |
1380 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) | |
1381 | nfs4_reset_seqids(server, mark_reclaim); | |
1382 | rcu_read_unlock(); | |
cee54fc9 TM |
1383 | } |
1384 | ||
b79a4a1b TM |
1385 | static void nfs4_state_start_reclaim_reboot(struct nfs_client *clp) |
1386 | { | |
1387 | /* Mark all delegations for reclaim */ | |
1388 | nfs_delegation_mark_reclaim(clp); | |
1389 | nfs4_state_mark_reclaim_helper(clp, nfs4_state_mark_reclaim_reboot); | |
1390 | } | |
1391 | ||
fce5c838 RL |
1392 | static void nfs4_reclaim_complete(struct nfs_client *clp, |
1393 | const struct nfs4_state_recovery_ops *ops) | |
1394 | { | |
1395 | /* Notify the server we're done reclaiming our state */ | |
1396 | if (ops->reclaim_complete) | |
1397 | (void)ops->reclaim_complete(clp); | |
1398 | } | |
1399 | ||
24d292b8 | 1400 | static void nfs4_clear_reclaim_server(struct nfs_server *server) |
b79a4a1b | 1401 | { |
24d292b8 | 1402 | struct nfs_client *clp = server->nfs_client; |
b79a4a1b TM |
1403 | struct nfs4_state_owner *sp; |
1404 | struct rb_node *pos; | |
1405 | struct nfs4_state *state; | |
1406 | ||
24d292b8 CL |
1407 | spin_lock(&clp->cl_lock); |
1408 | for (pos = rb_first(&server->state_owners); | |
1409 | pos != NULL; | |
1410 | pos = rb_next(pos)) { | |
1411 | sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); | |
b79a4a1b TM |
1412 | spin_lock(&sp->so_lock); |
1413 | list_for_each_entry(state, &sp->so_states, open_states) { | |
24d292b8 CL |
1414 | if (!test_and_clear_bit(NFS_STATE_RECLAIM_REBOOT, |
1415 | &state->flags)) | |
b79a4a1b TM |
1416 | continue; |
1417 | nfs4_state_mark_reclaim_nograce(clp, state); | |
1418 | } | |
1419 | spin_unlock(&sp->so_lock); | |
1420 | } | |
24d292b8 CL |
1421 | spin_unlock(&clp->cl_lock); |
1422 | } | |
1423 | ||
1424 | static int nfs4_state_clear_reclaim_reboot(struct nfs_client *clp) | |
1425 | { | |
1426 | struct nfs_server *server; | |
1427 | ||
1428 | if (!test_and_clear_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) | |
1429 | return 0; | |
1430 | ||
1431 | rcu_read_lock(); | |
1432 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) | |
1433 | nfs4_clear_reclaim_server(server); | |
1434 | rcu_read_unlock(); | |
b79a4a1b TM |
1435 | |
1436 | nfs_delegation_reap_unclaimed(clp); | |
6eaa6149 TM |
1437 | return 1; |
1438 | } | |
1439 | ||
1440 | static void nfs4_state_end_reclaim_reboot(struct nfs_client *clp) | |
1441 | { | |
1442 | if (!nfs4_state_clear_reclaim_reboot(clp)) | |
1443 | return; | |
1444 | nfs4_reclaim_complete(clp, clp->cl_mvops->reboot_recovery_ops); | |
b79a4a1b TM |
1445 | } |
1446 | ||
1447 | static void nfs_delegation_clear_all(struct nfs_client *clp) | |
1448 | { | |
1449 | nfs_delegation_mark_reclaim(clp); | |
1450 | nfs_delegation_reap_unclaimed(clp); | |
1451 | } | |
1452 | ||
1453 | static void nfs4_state_start_reclaim_nograce(struct nfs_client *clp) | |
1454 | { | |
1455 | nfs_delegation_clear_all(clp); | |
1456 | nfs4_state_mark_reclaim_helper(clp, nfs4_state_mark_reclaim_nograce); | |
1457 | } | |
1458 | ||
168667c4 TM |
1459 | static void nfs4_warn_keyexpired(const char *s) |
1460 | { | |
1461 | printk_ratelimited(KERN_WARNING "Error: state manager" | |
1462 | " encountered RPCSEC_GSS session" | |
1463 | " expired against NFSv4 server %s.\n", | |
1464 | s); | |
1465 | } | |
1466 | ||
4f7cdf18 | 1467 | static int nfs4_recovery_handle_error(struct nfs_client *clp, int error) |
e598d843 TM |
1468 | { |
1469 | switch (error) { | |
4f38e4aa TM |
1470 | case 0: |
1471 | break; | |
e598d843 | 1472 | case -NFS4ERR_CB_PATH_DOWN: |
ad1e3968 | 1473 | nfs40_handle_cb_pathdown(clp); |
4f38e4aa | 1474 | break; |
c8b7ae3d TM |
1475 | case -NFS4ERR_NO_GRACE: |
1476 | nfs4_state_end_reclaim_reboot(clp); | |
4f38e4aa | 1477 | break; |
e598d843 TM |
1478 | case -NFS4ERR_STALE_CLIENTID: |
1479 | case -NFS4ERR_LEASE_MOVED: | |
1480 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
6eaa6149 | 1481 | nfs4_state_clear_reclaim_reboot(clp); |
e598d843 TM |
1482 | nfs4_state_start_reclaim_reboot(clp); |
1483 | break; | |
1484 | case -NFS4ERR_EXPIRED: | |
1485 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1486 | nfs4_state_start_reclaim_nograce(clp); | |
8ba9bf8e | 1487 | break; |
c3fad1b1 AA |
1488 | case -NFS4ERR_BADSESSION: |
1489 | case -NFS4ERR_BADSLOT: | |
1490 | case -NFS4ERR_BAD_HIGH_SLOT: | |
1491 | case -NFS4ERR_DEADSESSION: | |
1492 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
1493 | case -NFS4ERR_SEQ_FALSE_RETRY: | |
1494 | case -NFS4ERR_SEQ_MISORDERED: | |
6df08189 | 1495 | set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); |
0b9e2d41 | 1496 | /* Zero session reset errors */ |
4f38e4aa | 1497 | break; |
168667c4 TM |
1498 | case -EKEYEXPIRED: |
1499 | /* Nothing we can do */ | |
1500 | nfs4_warn_keyexpired(clp->cl_hostname); | |
4f38e4aa TM |
1501 | break; |
1502 | default: | |
1503 | return error; | |
e598d843 | 1504 | } |
4f38e4aa | 1505 | return 0; |
e598d843 TM |
1506 | } |
1507 | ||
02860014 | 1508 | static int nfs4_do_reclaim(struct nfs_client *clp, const struct nfs4_state_recovery_ops *ops) |
1da177e4 | 1509 | { |
24d292b8 CL |
1510 | struct nfs4_state_owner *sp; |
1511 | struct nfs_server *server; | |
9f958ab8 | 1512 | struct rb_node *pos; |
1da177e4 LT |
1513 | int status = 0; |
1514 | ||
7eff03ae | 1515 | restart: |
24d292b8 CL |
1516 | rcu_read_lock(); |
1517 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { | |
0aaaf5c4 | 1518 | nfs4_purge_state_owners(server); |
24d292b8 CL |
1519 | spin_lock(&clp->cl_lock); |
1520 | for (pos = rb_first(&server->state_owners); | |
1521 | pos != NULL; | |
1522 | pos = rb_next(pos)) { | |
1523 | sp = rb_entry(pos, | |
1524 | struct nfs4_state_owner, so_server_node); | |
1525 | if (!test_and_clear_bit(ops->owner_flag_bit, | |
1526 | &sp->so_flags)) | |
1527 | continue; | |
1528 | atomic_inc(&sp->so_count); | |
1529 | spin_unlock(&clp->cl_lock); | |
1530 | rcu_read_unlock(); | |
1531 | ||
1532 | status = nfs4_reclaim_open_state(sp, ops); | |
1533 | if (status < 0) { | |
1534 | set_bit(ops->owner_flag_bit, &sp->so_flags); | |
1535 | nfs4_put_state_owner(sp); | |
1536 | return nfs4_recovery_handle_error(clp, status); | |
1537 | } | |
1538 | ||
7eff03ae | 1539 | nfs4_put_state_owner(sp); |
24d292b8 | 1540 | goto restart; |
7eff03ae | 1541 | } |
24d292b8 | 1542 | spin_unlock(&clp->cl_lock); |
02860014 | 1543 | } |
24d292b8 | 1544 | rcu_read_unlock(); |
02860014 TM |
1545 | return status; |
1546 | } | |
1547 | ||
1548 | static int nfs4_check_lease(struct nfs_client *clp) | |
1549 | { | |
1550 | struct rpc_cred *cred; | |
c48f4f35 TM |
1551 | const struct nfs4_state_maintenance_ops *ops = |
1552 | clp->cl_mvops->state_renewal_ops; | |
4f38e4aa | 1553 | int status; |
1da177e4 | 1554 | |
0f605b56 TM |
1555 | /* Is the client already known to have an expired lease? */ |
1556 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) | |
1557 | return 0; | |
a7b72103 AA |
1558 | spin_lock(&clp->cl_lock); |
1559 | cred = ops->get_state_renewal_cred_locked(clp); | |
1560 | spin_unlock(&clp->cl_lock); | |
0f605b56 TM |
1561 | if (cred == NULL) { |
1562 | cred = nfs4_get_setclientid_cred(clp); | |
4f38e4aa | 1563 | status = -ENOKEY; |
0f605b56 TM |
1564 | if (cred == NULL) |
1565 | goto out; | |
286d7d6a | 1566 | } |
8e69514f | 1567 | status = ops->renew_lease(clp, cred); |
0f605b56 TM |
1568 | put_rpccred(cred); |
1569 | out: | |
4f7cdf18 | 1570 | return nfs4_recovery_handle_error(clp, status); |
02860014 TM |
1571 | } |
1572 | ||
1573 | static int nfs4_reclaim_lease(struct nfs_client *clp) | |
1574 | { | |
1575 | struct rpc_cred *cred; | |
c48f4f35 TM |
1576 | const struct nfs4_state_recovery_ops *ops = |
1577 | clp->cl_mvops->reboot_recovery_ops; | |
02860014 TM |
1578 | int status = -ENOENT; |
1579 | ||
90a16617 | 1580 | cred = ops->get_clid_cred(clp); |
286d7d6a | 1581 | if (cred != NULL) { |
591d71cb | 1582 | status = ops->establish_clid(clp, cred); |
286d7d6a | 1583 | put_rpccred(cred); |
a2b2bb88 TM |
1584 | /* Handle case where the user hasn't set up machine creds */ |
1585 | if (status == -EACCES && cred == clp->cl_machine_cred) { | |
1586 | nfs4_clear_machine_cred(clp); | |
02860014 | 1587 | status = -EAGAIN; |
a2b2bb88 | 1588 | } |
c2e713dd BH |
1589 | if (status == -NFS4ERR_MINOR_VERS_MISMATCH) |
1590 | status = -EPROTONOSUPPORT; | |
286d7d6a | 1591 | } |
02860014 TM |
1592 | return status; |
1593 | } | |
1594 | ||
76db6d95 | 1595 | #ifdef CONFIG_NFS_V4_1 |
0400a6b0 TM |
1596 | void nfs4_schedule_session_recovery(struct nfs4_session *session) |
1597 | { | |
444f72fe TM |
1598 | struct nfs_client *clp = session->clp; |
1599 | ||
1600 | set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); | |
1601 | nfs4_schedule_lease_recovery(clp); | |
0400a6b0 | 1602 | } |
cbdabc7f | 1603 | EXPORT_SYMBOL_GPL(nfs4_schedule_session_recovery); |
0400a6b0 | 1604 | |
b9efa1b2 AA |
1605 | void nfs41_handle_recall_slot(struct nfs_client *clp) |
1606 | { | |
1607 | set_bit(NFS4CLNT_RECALL_SLOT, &clp->cl_state); | |
0400a6b0 | 1608 | nfs4_schedule_state_manager(clp); |
b9efa1b2 AA |
1609 | } |
1610 | ||
0f79fd6f TM |
1611 | static void nfs4_reset_all_state(struct nfs_client *clp) |
1612 | { | |
1613 | if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) == 0) { | |
1614 | clp->cl_boot_time = CURRENT_TIME; | |
1615 | nfs4_state_start_reclaim_nograce(clp); | |
0400a6b0 | 1616 | nfs4_schedule_state_manager(clp); |
0f79fd6f TM |
1617 | } |
1618 | } | |
1619 | ||
1620 | static void nfs41_handle_server_reboot(struct nfs_client *clp) | |
1621 | { | |
1622 | if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) == 0) { | |
1623 | nfs4_state_start_reclaim_reboot(clp); | |
0400a6b0 | 1624 | nfs4_schedule_state_manager(clp); |
0f79fd6f TM |
1625 | } |
1626 | } | |
1627 | ||
1628 | static void nfs41_handle_state_revoked(struct nfs_client *clp) | |
1629 | { | |
1630 | /* Temporary */ | |
1631 | nfs4_reset_all_state(clp); | |
1632 | } | |
1633 | ||
1634 | static void nfs41_handle_recallable_state_revoked(struct nfs_client *clp) | |
1635 | { | |
1636 | /* This will need to handle layouts too */ | |
1637 | nfs_expire_all_delegations(clp); | |
1638 | } | |
1639 | ||
1640 | static void nfs41_handle_cb_path_down(struct nfs_client *clp) | |
1641 | { | |
1642 | nfs_expire_all_delegations(clp); | |
1643 | if (test_and_set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state) == 0) | |
0400a6b0 | 1644 | nfs4_schedule_state_manager(clp); |
0f79fd6f TM |
1645 | } |
1646 | ||
0629e370 AB |
1647 | void nfs41_handle_sequence_flag_errors(struct nfs_client *clp, u32 flags) |
1648 | { | |
1649 | if (!flags) | |
1650 | return; | |
111d489f | 1651 | if (flags & SEQ4_STATUS_RESTART_RECLAIM_NEEDED) |
0f79fd6f | 1652 | nfs41_handle_server_reboot(clp); |
111d489f | 1653 | if (flags & (SEQ4_STATUS_EXPIRED_ALL_STATE_REVOKED | |
0629e370 AB |
1654 | SEQ4_STATUS_EXPIRED_SOME_STATE_REVOKED | |
1655 | SEQ4_STATUS_ADMIN_STATE_REVOKED | | |
0f79fd6f TM |
1656 | SEQ4_STATUS_LEASE_MOVED)) |
1657 | nfs41_handle_state_revoked(clp); | |
111d489f | 1658 | if (flags & SEQ4_STATUS_RECALLABLE_STATE_REVOKED) |
0f79fd6f | 1659 | nfs41_handle_recallable_state_revoked(clp); |
111d489f | 1660 | if (flags & (SEQ4_STATUS_CB_PATH_DOWN | |
0629e370 AB |
1661 | SEQ4_STATUS_BACKCHANNEL_FAULT | |
1662 | SEQ4_STATUS_CB_PATH_DOWN_SESSION)) | |
0f79fd6f | 1663 | nfs41_handle_cb_path_down(clp); |
0629e370 AB |
1664 | } |
1665 | ||
c3fad1b1 AA |
1666 | static int nfs4_reset_session(struct nfs_client *clp) |
1667 | { | |
1668 | int status; | |
1669 | ||
38045412 | 1670 | nfs4_begin_drain_session(clp); |
c3fad1b1 AA |
1671 | status = nfs4_proc_destroy_session(clp->cl_session); |
1672 | if (status && status != -NFS4ERR_BADSESSION && | |
1673 | status != -NFS4ERR_DEADSESSION) { | |
f455848a | 1674 | status = nfs4_recovery_handle_error(clp, status); |
c3fad1b1 AA |
1675 | goto out; |
1676 | } | |
1677 | ||
1678 | memset(clp->cl_session->sess_id.data, 0, NFS4_MAX_SESSIONID_LEN); | |
f26468fb | 1679 | status = nfs4_proc_create_session(clp); |
41f54a55 | 1680 | if (status) { |
f455848a | 1681 | status = nfs4_recovery_handle_error(clp, status); |
41f54a55 AA |
1682 | goto out; |
1683 | } | |
444f72fe | 1684 | clear_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); |
41f54a55 AA |
1685 | /* create_session negotiated new slot table */ |
1686 | clear_bit(NFS4CLNT_RECALL_SLOT, &clp->cl_state); | |
9dfdf404 | 1687 | |
41f54a55 AA |
1688 | /* Let the state manager reestablish state */ |
1689 | if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) | |
5601a00d | 1690 | nfs41_setup_state_renewal(clp); |
41f54a55 | 1691 | out: |
c3fad1b1 AA |
1692 | return status; |
1693 | } | |
76db6d95 | 1694 | |
b9efa1b2 AA |
1695 | static int nfs4_recall_slot(struct nfs_client *clp) |
1696 | { | |
1697 | struct nfs4_slot_table *fc_tbl = &clp->cl_session->fc_slot_table; | |
1698 | struct nfs4_channel_attrs *fc_attrs = &clp->cl_session->fc_attrs; | |
1699 | struct nfs4_slot *new, *old; | |
1700 | int i; | |
1701 | ||
1702 | nfs4_begin_drain_session(clp); | |
1703 | new = kmalloc(fc_tbl->target_max_slots * sizeof(struct nfs4_slot), | |
8535b2be | 1704 | GFP_NOFS); |
b9efa1b2 AA |
1705 | if (!new) |
1706 | return -ENOMEM; | |
1707 | ||
1708 | spin_lock(&fc_tbl->slot_tbl_lock); | |
1709 | for (i = 0; i < fc_tbl->target_max_slots; i++) | |
1710 | new[i].seq_nr = fc_tbl->slots[i].seq_nr; | |
1711 | old = fc_tbl->slots; | |
1712 | fc_tbl->slots = new; | |
1713 | fc_tbl->max_slots = fc_tbl->target_max_slots; | |
1714 | fc_tbl->target_max_slots = 0; | |
1715 | fc_attrs->max_reqs = fc_tbl->max_slots; | |
1716 | spin_unlock(&fc_tbl->slot_tbl_lock); | |
1717 | ||
1718 | kfree(old); | |
1719 | nfs4_end_drain_session(clp); | |
1720 | return 0; | |
1721 | } | |
1722 | ||
76db6d95 | 1723 | #else /* CONFIG_NFS_V4_1 */ |
c3fad1b1 | 1724 | static int nfs4_reset_session(struct nfs_client *clp) { return 0; } |
5601a00d | 1725 | static int nfs4_end_drain_session(struct nfs_client *clp) { return 0; } |
b9efa1b2 | 1726 | static int nfs4_recall_slot(struct nfs_client *clp) { return 0; } |
76db6d95 AA |
1727 | #endif /* CONFIG_NFS_V4_1 */ |
1728 | ||
78722e9c AA |
1729 | /* Set NFS4CLNT_LEASE_EXPIRED for all v4.0 errors and for recoverable errors |
1730 | * on EXCHANGE_ID for v4.1 | |
1731 | */ | |
1732 | static void nfs4_set_lease_expired(struct nfs_client *clp, int status) | |
1733 | { | |
fd954ae1 TM |
1734 | switch (status) { |
1735 | case -NFS4ERR_CLID_INUSE: | |
1736 | case -NFS4ERR_STALE_CLIENTID: | |
1737 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); | |
1738 | break; | |
1739 | case -NFS4ERR_DELAY: | |
1bd714f2 | 1740 | case -ETIMEDOUT: |
fd954ae1 TM |
1741 | case -EAGAIN: |
1742 | ssleep(1); | |
1743 | break; | |
78722e9c | 1744 | |
fd954ae1 TM |
1745 | case -EKEYEXPIRED: |
1746 | nfs4_warn_keyexpired(clp->cl_hostname); | |
1747 | case -NFS4ERR_NOT_SAME: /* FixMe: implement recovery | |
1748 | * in nfs4_exchange_id */ | |
1749 | default: | |
1750 | return; | |
78722e9c AA |
1751 | } |
1752 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1753 | } | |
1754 | ||
e005e804 | 1755 | static void nfs4_state_manager(struct nfs_client *clp) |
02860014 | 1756 | { |
02860014 TM |
1757 | int status = 0; |
1758 | ||
02860014 | 1759 | /* Ensure exclusive access to NFSv4 state */ |
47c2199b | 1760 | do { |
b79a4a1b TM |
1761 | if (test_and_clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) { |
1762 | /* We're going to have to re-establish a clientid */ | |
1763 | status = nfs4_reclaim_lease(clp); | |
1764 | if (status) { | |
78722e9c | 1765 | nfs4_set_lease_expired(clp, status); |
b6d408ba TM |
1766 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, |
1767 | &clp->cl_state)) | |
b79a4a1b | 1768 | continue; |
76db6d95 AA |
1769 | if (clp->cl_cons_state == |
1770 | NFS_CS_SESSION_INITING) | |
1771 | nfs_mark_client_ready(clp, status); | |
b79a4a1b TM |
1772 | goto out_error; |
1773 | } | |
e598d843 | 1774 | clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); |
78fe0f41 WAA |
1775 | |
1776 | if (test_and_clear_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, | |
1777 | &clp->cl_state)) | |
1778 | nfs4_state_start_reclaim_nograce(clp); | |
1779 | else | |
1780 | set_bit(NFS4CLNT_RECLAIM_REBOOT, | |
1781 | &clp->cl_state); | |
1782 | ||
974cec8c | 1783 | pnfs_destroy_all_layouts(clp); |
e598d843 TM |
1784 | } |
1785 | ||
1786 | if (test_and_clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state)) { | |
1787 | status = nfs4_check_lease(clp); | |
4f38e4aa TM |
1788 | if (status < 0) |
1789 | goto out_error; | |
b6d408ba | 1790 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
e598d843 | 1791 | continue; |
b79a4a1b | 1792 | } |
b6d408ba | 1793 | |
c3fad1b1 | 1794 | /* Initialize or reset the session */ |
6df08189 | 1795 | if (test_and_clear_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state) |
7111dc73 | 1796 | && nfs4_has_session(clp)) { |
4d643d1d | 1797 | status = nfs4_reset_session(clp); |
b6d408ba TM |
1798 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
1799 | continue; | |
1800 | if (status < 0) | |
76db6d95 | 1801 | goto out_error; |
76db6d95 | 1802 | } |
b6d408ba | 1803 | |
b79a4a1b | 1804 | /* First recover reboot state... */ |
e345e88a | 1805 | if (test_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) { |
591d71cb | 1806 | status = nfs4_do_reclaim(clp, |
c48f4f35 | 1807 | clp->cl_mvops->reboot_recovery_ops); |
b6d408ba | 1808 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) || |
6df08189 | 1809 | test_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state)) |
c3fad1b1 | 1810 | continue; |
b79a4a1b | 1811 | nfs4_state_end_reclaim_reboot(clp); |
b6d408ba TM |
1812 | if (test_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) |
1813 | continue; | |
1814 | if (status < 0) | |
1815 | goto out_error; | |
02860014 TM |
1816 | } |
1817 | ||
b79a4a1b TM |
1818 | /* Now recover expired state... */ |
1819 | if (test_and_clear_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) { | |
591d71cb | 1820 | status = nfs4_do_reclaim(clp, |
c48f4f35 | 1821 | clp->cl_mvops->nograce_recovery_ops); |
b6d408ba | 1822 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) || |
6df08189 | 1823 | test_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state) || |
b6d408ba TM |
1824 | test_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) |
1825 | continue; | |
1826 | if (status < 0) | |
b79a4a1b | 1827 | goto out_error; |
1da177e4 | 1828 | } |
707fb4b3 | 1829 | |
5601a00d | 1830 | nfs4_end_drain_session(clp); |
707fb4b3 TM |
1831 | if (test_and_clear_bit(NFS4CLNT_DELEGRETURN, &clp->cl_state)) { |
1832 | nfs_client_return_marked_delegations(clp); | |
1833 | continue; | |
1834 | } | |
b9efa1b2 AA |
1835 | /* Recall session slots */ |
1836 | if (test_and_clear_bit(NFS4CLNT_RECALL_SLOT, &clp->cl_state) | |
1837 | && nfs4_has_session(clp)) { | |
1838 | status = nfs4_recall_slot(clp); | |
1839 | if (status < 0) | |
1840 | goto out_error; | |
1841 | continue; | |
1842 | } | |
1843 | ||
e005e804 TM |
1844 | |
1845 | nfs4_clear_state_manager_bit(clp); | |
f3c76491 TM |
1846 | /* Did we race with an attempt to give us more work? */ |
1847 | if (clp->cl_state == 0) | |
1848 | break; | |
1849 | if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) != 0) | |
1850 | break; | |
47c2199b | 1851 | } while (atomic_read(&clp->cl_count) > 1); |
e005e804 | 1852 | return; |
1da177e4 | 1853 | out_error: |
9a3ba432 | 1854 | pr_warn_ratelimited("NFS: state manager failed on NFSv4 server %s" |
5d8515ca | 1855 | " with error %d\n", clp->cl_hostname, -status); |
5601a00d | 1856 | nfs4_end_drain_session(clp); |
e005e804 TM |
1857 | nfs4_clear_state_manager_bit(clp); |
1858 | } | |
1859 | ||
1860 | static int nfs4_run_state_manager(void *ptr) | |
1861 | { | |
1862 | struct nfs_client *clp = ptr; | |
1863 | ||
1864 | allow_signal(SIGKILL); | |
1865 | nfs4_state_manager(clp); | |
1866 | nfs_put_client(clp); | |
1867 | module_put_and_exit(0); | |
1868 | return 0; | |
1da177e4 LT |
1869 | } |
1870 | ||
1871 | /* | |
1872 | * Local variables: | |
1873 | * c-basic-offset: 8 | |
1874 | * End: | |
1875 | */ |