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 | { | |
396 | sc->flags = 0; | |
397 | sc->counter = 0; | |
398 | spin_lock_init(&sc->lock); | |
399 | INIT_LIST_HEAD(&sc->list); | |
400 | rpc_init_wait_queue(&sc->wait, "Seqid_waitqueue"); | |
401 | } | |
402 | ||
403 | static void | |
404 | nfs4_destroy_seqid_counter(struct nfs_seqid_counter *sc) | |
405 | { | |
406 | rpc_destroy_wait_queue(&sc->wait); | |
407 | } | |
408 | ||
1da177e4 LT |
409 | /* |
410 | * nfs4_alloc_state_owner(): this is called on the OPEN or CREATE path to | |
411 | * create a new state_owner. | |
412 | * | |
413 | */ | |
414 | static struct nfs4_state_owner * | |
d1e284d5 TM |
415 | nfs4_alloc_state_owner(struct nfs_server *server, |
416 | struct rpc_cred *cred, | |
417 | gfp_t gfp_flags) | |
1da177e4 LT |
418 | { |
419 | struct nfs4_state_owner *sp; | |
420 | ||
d1e284d5 | 421 | sp = kzalloc(sizeof(*sp), gfp_flags); |
1da177e4 LT |
422 | if (!sp) |
423 | return NULL; | |
d1e284d5 TM |
424 | sp->so_server = server; |
425 | sp->so_cred = get_rpccred(cred); | |
ec073428 | 426 | spin_lock_init(&sp->so_lock); |
1da177e4 | 427 | INIT_LIST_HEAD(&sp->so_states); |
7ba127ab | 428 | nfs4_init_seqid_counter(&sp->so_seqid); |
1da177e4 | 429 | atomic_set(&sp->so_count, 1); |
0aaaf5c4 | 430 | INIT_LIST_HEAD(&sp->so_lru); |
1da177e4 LT |
431 | return sp; |
432 | } | |
433 | ||
1d2e88e7 | 434 | static void |
1da177e4 LT |
435 | nfs4_drop_state_owner(struct nfs4_state_owner *sp) |
436 | { | |
24d292b8 CL |
437 | if (!RB_EMPTY_NODE(&sp->so_server_node)) { |
438 | struct nfs_server *server = sp->so_server; | |
439 | struct nfs_client *clp = server->nfs_client; | |
9f958ab8 TM |
440 | |
441 | spin_lock(&clp->cl_lock); | |
24d292b8 CL |
442 | rb_erase(&sp->so_server_node, &server->state_owners); |
443 | RB_CLEAR_NODE(&sp->so_server_node); | |
9f958ab8 TM |
444 | spin_unlock(&clp->cl_lock); |
445 | } | |
1da177e4 LT |
446 | } |
447 | ||
0aaaf5c4 CL |
448 | static void nfs4_free_state_owner(struct nfs4_state_owner *sp) |
449 | { | |
7ba127ab | 450 | nfs4_destroy_seqid_counter(&sp->so_seqid); |
0aaaf5c4 CL |
451 | put_rpccred(sp->so_cred); |
452 | kfree(sp); | |
453 | } | |
454 | ||
455 | static void nfs4_gc_state_owners(struct nfs_server *server) | |
456 | { | |
457 | struct nfs_client *clp = server->nfs_client; | |
458 | struct nfs4_state_owner *sp, *tmp; | |
459 | unsigned long time_min, time_max; | |
460 | LIST_HEAD(doomed); | |
461 | ||
462 | spin_lock(&clp->cl_lock); | |
463 | time_max = jiffies; | |
464 | time_min = (long)time_max - (long)clp->cl_lease_time; | |
465 | list_for_each_entry_safe(sp, tmp, &server->state_owners_lru, so_lru) { | |
466 | /* NB: LRU is sorted so that oldest is at the head */ | |
467 | if (time_in_range(sp->so_expires, time_min, time_max)) | |
468 | break; | |
469 | list_move(&sp->so_lru, &doomed); | |
470 | nfs4_remove_state_owner_locked(sp); | |
471 | } | |
472 | spin_unlock(&clp->cl_lock); | |
473 | ||
474 | list_for_each_entry_safe(sp, tmp, &doomed, so_lru) { | |
475 | list_del(&sp->so_lru); | |
476 | nfs4_free_state_owner(sp); | |
477 | } | |
478 | } | |
479 | ||
24d292b8 CL |
480 | /** |
481 | * nfs4_get_state_owner - Look up a state owner given a credential | |
482 | * @server: nfs_server to search | |
483 | * @cred: RPC credential to match | |
484 | * | |
485 | * Returns a pointer to an instantiated nfs4_state_owner struct, or NULL. | |
486 | */ | |
487 | struct nfs4_state_owner *nfs4_get_state_owner(struct nfs_server *server, | |
d1e284d5 TM |
488 | struct rpc_cred *cred, |
489 | gfp_t gfp_flags) | |
1da177e4 | 490 | { |
7539bbab | 491 | struct nfs_client *clp = server->nfs_client; |
1da177e4 LT |
492 | struct nfs4_state_owner *sp, *new; |
493 | ||
1da177e4 | 494 | spin_lock(&clp->cl_lock); |
24d292b8 | 495 | sp = nfs4_find_state_owner_locked(server, cred); |
1da177e4 | 496 | spin_unlock(&clp->cl_lock); |
1da177e4 | 497 | if (sp != NULL) |
0aaaf5c4 | 498 | goto out; |
d1e284d5 | 499 | new = nfs4_alloc_state_owner(server, cred, gfp_flags); |
9f958ab8 | 500 | if (new == NULL) |
0aaaf5c4 | 501 | goto out; |
9157c31d TM |
502 | do { |
503 | if (ida_pre_get(&server->openowner_id, gfp_flags) == 0) | |
504 | break; | |
505 | spin_lock(&clp->cl_lock); | |
506 | sp = nfs4_insert_state_owner_locked(new); | |
507 | spin_unlock(&clp->cl_lock); | |
508 | } while (sp == ERR_PTR(-EAGAIN)); | |
d1e284d5 TM |
509 | if (sp != new) |
510 | nfs4_free_state_owner(new); | |
0aaaf5c4 CL |
511 | out: |
512 | nfs4_gc_state_owners(server); | |
9f958ab8 | 513 | return sp; |
1da177e4 LT |
514 | } |
515 | ||
24d292b8 CL |
516 | /** |
517 | * nfs4_put_state_owner - Release a nfs4_state_owner | |
518 | * @sp: state owner data to release | |
24d292b8 | 519 | */ |
1da177e4 LT |
520 | void nfs4_put_state_owner(struct nfs4_state_owner *sp) |
521 | { | |
0aaaf5c4 CL |
522 | struct nfs_server *server = sp->so_server; |
523 | struct nfs_client *clp = server->nfs_client; | |
1da177e4 LT |
524 | |
525 | if (!atomic_dec_and_lock(&sp->so_count, &clp->cl_lock)) | |
526 | return; | |
0aaaf5c4 CL |
527 | |
528 | if (!RB_EMPTY_NODE(&sp->so_server_node)) { | |
529 | sp->so_expires = jiffies; | |
530 | list_add_tail(&sp->so_lru, &server->state_owners_lru); | |
531 | spin_unlock(&clp->cl_lock); | |
532 | } else { | |
533 | nfs4_remove_state_owner_locked(sp); | |
534 | spin_unlock(&clp->cl_lock); | |
535 | nfs4_free_state_owner(sp); | |
536 | } | |
537 | } | |
538 | ||
539 | /** | |
540 | * nfs4_purge_state_owners - Release all cached state owners | |
541 | * @server: nfs_server with cached state owners to release | |
542 | * | |
543 | * Called at umount time. Remaining state owners will be on | |
544 | * the LRU with ref count of zero. | |
545 | */ | |
546 | void nfs4_purge_state_owners(struct nfs_server *server) | |
547 | { | |
548 | struct nfs_client *clp = server->nfs_client; | |
549 | struct nfs4_state_owner *sp, *tmp; | |
550 | LIST_HEAD(doomed); | |
551 | ||
552 | spin_lock(&clp->cl_lock); | |
553 | list_for_each_entry_safe(sp, tmp, &server->state_owners_lru, so_lru) { | |
554 | list_move(&sp->so_lru, &doomed); | |
555 | nfs4_remove_state_owner_locked(sp); | |
556 | } | |
1da177e4 | 557 | spin_unlock(&clp->cl_lock); |
0aaaf5c4 CL |
558 | |
559 | list_for_each_entry_safe(sp, tmp, &doomed, so_lru) { | |
560 | list_del(&sp->so_lru); | |
561 | nfs4_free_state_owner(sp); | |
562 | } | |
1da177e4 LT |
563 | } |
564 | ||
565 | static struct nfs4_state * | |
566 | nfs4_alloc_open_state(void) | |
567 | { | |
568 | struct nfs4_state *state; | |
569 | ||
8535b2be | 570 | state = kzalloc(sizeof(*state), GFP_NOFS); |
1da177e4 LT |
571 | if (!state) |
572 | return NULL; | |
1da177e4 LT |
573 | atomic_set(&state->count, 1); |
574 | INIT_LIST_HEAD(&state->lock_states); | |
8d0a8a9d | 575 | spin_lock_init(&state->state_lock); |
8bda4e4c | 576 | seqlock_init(&state->seqlock); |
1da177e4 LT |
577 | return state; |
578 | } | |
579 | ||
4cecb76f | 580 | void |
dc0b027d | 581 | nfs4_state_set_mode_locked(struct nfs4_state *state, fmode_t fmode) |
4cecb76f | 582 | { |
dc0b027d | 583 | if (state->state == fmode) |
4cecb76f TM |
584 | return; |
585 | /* NB! List reordering - see the reclaim code for why. */ | |
dc0b027d TM |
586 | if ((fmode & FMODE_WRITE) != (state->state & FMODE_WRITE)) { |
587 | if (fmode & FMODE_WRITE) | |
4cecb76f TM |
588 | list_move(&state->open_states, &state->owner->so_states); |
589 | else | |
590 | list_move_tail(&state->open_states, &state->owner->so_states); | |
591 | } | |
dc0b027d | 592 | state->state = fmode; |
4cecb76f TM |
593 | } |
594 | ||
1da177e4 LT |
595 | static struct nfs4_state * |
596 | __nfs4_find_state_byowner(struct inode *inode, struct nfs4_state_owner *owner) | |
597 | { | |
598 | struct nfs_inode *nfsi = NFS_I(inode); | |
599 | struct nfs4_state *state; | |
600 | ||
601 | list_for_each_entry(state, &nfsi->open_states, inode_states) { | |
1c816efa | 602 | if (state->owner != owner) |
1da177e4 | 603 | continue; |
1c816efa | 604 | if (atomic_inc_not_zero(&state->count)) |
1da177e4 | 605 | return state; |
1da177e4 LT |
606 | } |
607 | return NULL; | |
608 | } | |
609 | ||
1da177e4 LT |
610 | static void |
611 | nfs4_free_open_state(struct nfs4_state *state) | |
612 | { | |
613 | kfree(state); | |
614 | } | |
615 | ||
616 | struct nfs4_state * | |
617 | nfs4_get_open_state(struct inode *inode, struct nfs4_state_owner *owner) | |
618 | { | |
619 | struct nfs4_state *state, *new; | |
620 | struct nfs_inode *nfsi = NFS_I(inode); | |
621 | ||
622 | spin_lock(&inode->i_lock); | |
623 | state = __nfs4_find_state_byowner(inode, owner); | |
624 | spin_unlock(&inode->i_lock); | |
625 | if (state) | |
626 | goto out; | |
627 | new = nfs4_alloc_open_state(); | |
ec073428 | 628 | spin_lock(&owner->so_lock); |
1da177e4 LT |
629 | spin_lock(&inode->i_lock); |
630 | state = __nfs4_find_state_byowner(inode, owner); | |
631 | if (state == NULL && new != NULL) { | |
632 | state = new; | |
1da177e4 LT |
633 | state->owner = owner; |
634 | atomic_inc(&owner->so_count); | |
635 | list_add(&state->inode_states, &nfsi->open_states); | |
0444d76a DC |
636 | ihold(inode); |
637 | state->inode = inode; | |
1da177e4 | 638 | spin_unlock(&inode->i_lock); |
ec073428 TM |
639 | /* Note: The reclaim code dictates that we add stateless |
640 | * and read-only stateids to the end of the list */ | |
641 | list_add_tail(&state->open_states, &owner->so_states); | |
642 | spin_unlock(&owner->so_lock); | |
1da177e4 LT |
643 | } else { |
644 | spin_unlock(&inode->i_lock); | |
ec073428 | 645 | spin_unlock(&owner->so_lock); |
1da177e4 LT |
646 | if (new) |
647 | nfs4_free_open_state(new); | |
648 | } | |
649 | out: | |
650 | return state; | |
651 | } | |
652 | ||
1da177e4 LT |
653 | void nfs4_put_open_state(struct nfs4_state *state) |
654 | { | |
655 | struct inode *inode = state->inode; | |
656 | struct nfs4_state_owner *owner = state->owner; | |
657 | ||
ec073428 | 658 | if (!atomic_dec_and_lock(&state->count, &owner->so_lock)) |
1da177e4 | 659 | return; |
ec073428 | 660 | spin_lock(&inode->i_lock); |
ba683031 | 661 | list_del(&state->inode_states); |
1da177e4 | 662 | list_del(&state->open_states); |
ec073428 TM |
663 | spin_unlock(&inode->i_lock); |
664 | spin_unlock(&owner->so_lock); | |
1da177e4 | 665 | iput(inode); |
1da177e4 LT |
666 | nfs4_free_open_state(state); |
667 | nfs4_put_state_owner(owner); | |
668 | } | |
669 | ||
670 | /* | |
83c9d41e | 671 | * Close the current file. |
1da177e4 | 672 | */ |
643168c2 | 673 | static void __nfs4_close(struct nfs4_state *state, |
8535b2be | 674 | fmode_t fmode, gfp_t gfp_mask, int wait) |
1da177e4 | 675 | { |
1da177e4 | 676 | struct nfs4_state_owner *owner = state->owner; |
003707c7 | 677 | int call_close = 0; |
dc0b027d | 678 | fmode_t newstate; |
1da177e4 LT |
679 | |
680 | atomic_inc(&owner->so_count); | |
1da177e4 | 681 | /* Protect against nfs4_find_state() */ |
ec073428 | 682 | spin_lock(&owner->so_lock); |
dc0b027d | 683 | switch (fmode & (FMODE_READ | FMODE_WRITE)) { |
e7616923 TM |
684 | case FMODE_READ: |
685 | state->n_rdonly--; | |
686 | break; | |
687 | case FMODE_WRITE: | |
688 | state->n_wronly--; | |
689 | break; | |
690 | case FMODE_READ|FMODE_WRITE: | |
691 | state->n_rdwr--; | |
692 | } | |
003707c7 | 693 | newstate = FMODE_READ|FMODE_WRITE; |
e7616923 | 694 | if (state->n_rdwr == 0) { |
003707c7 | 695 | if (state->n_rdonly == 0) { |
e7616923 | 696 | newstate &= ~FMODE_READ; |
003707c7 TM |
697 | call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags); |
698 | call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); | |
699 | } | |
700 | if (state->n_wronly == 0) { | |
e7616923 | 701 | newstate &= ~FMODE_WRITE; |
003707c7 TM |
702 | call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags); |
703 | call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); | |
704 | } | |
705 | if (newstate == 0) | |
706 | clear_bit(NFS_DELEGATED_STATE, &state->flags); | |
e7616923 | 707 | } |
003707c7 | 708 | nfs4_state_set_mode_locked(state, newstate); |
ec073428 | 709 | spin_unlock(&owner->so_lock); |
4cecb76f | 710 | |
003707c7 | 711 | if (!call_close) { |
b39e625b TM |
712 | nfs4_put_open_state(state); |
713 | nfs4_put_state_owner(owner); | |
f7e8917a FI |
714 | } else { |
715 | bool roc = pnfs_roc(state->inode); | |
716 | ||
643168c2 | 717 | nfs4_do_close(state, gfp_mask, wait, roc); |
f7e8917a | 718 | } |
a49c3c77 TM |
719 | } |
720 | ||
643168c2 | 721 | void nfs4_close_state(struct nfs4_state *state, fmode_t fmode) |
a49c3c77 | 722 | { |
643168c2 | 723 | __nfs4_close(state, fmode, GFP_NOFS, 0); |
a49c3c77 TM |
724 | } |
725 | ||
643168c2 | 726 | void nfs4_close_sync(struct nfs4_state *state, fmode_t fmode) |
a49c3c77 | 727 | { |
643168c2 | 728 | __nfs4_close(state, fmode, GFP_KERNEL, 1); |
1da177e4 LT |
729 | } |
730 | ||
731 | /* | |
732 | * Search the state->lock_states for an existing lock_owner | |
733 | * that is compatible with current->files | |
734 | */ | |
735 | static struct nfs4_lock_state * | |
77041ed9 | 736 | __nfs4_find_lock_state(struct nfs4_state *state, fl_owner_t fl_owner, pid_t fl_pid, unsigned int type) |
1da177e4 LT |
737 | { |
738 | struct nfs4_lock_state *pos; | |
739 | list_for_each_entry(pos, &state->lock_states, ls_locks) { | |
77041ed9 | 740 | if (type != NFS4_ANY_LOCK_TYPE && pos->ls_owner.lo_type != type) |
1da177e4 | 741 | continue; |
77041ed9 TM |
742 | switch (pos->ls_owner.lo_type) { |
743 | case NFS4_POSIX_LOCK_TYPE: | |
744 | if (pos->ls_owner.lo_u.posix_owner != fl_owner) | |
745 | continue; | |
746 | break; | |
747 | case NFS4_FLOCK_LOCK_TYPE: | |
748 | if (pos->ls_owner.lo_u.flock_owner != fl_pid) | |
749 | continue; | |
750 | } | |
1da177e4 LT |
751 | atomic_inc(&pos->ls_count); |
752 | return pos; | |
753 | } | |
754 | return NULL; | |
755 | } | |
756 | ||
1da177e4 LT |
757 | /* |
758 | * Return a compatible lock_state. If no initialized lock_state structure | |
759 | * exists, return an uninitialized one. | |
760 | * | |
1da177e4 | 761 | */ |
77041ed9 | 762 | 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 |
763 | { |
764 | struct nfs4_lock_state *lsp; | |
24d292b8 | 765 | struct nfs_server *server = state->owner->so_server; |
1da177e4 | 766 | |
8535b2be | 767 | lsp = kzalloc(sizeof(*lsp), GFP_NOFS); |
1da177e4 LT |
768 | if (lsp == NULL) |
769 | return NULL; | |
7ba127ab | 770 | nfs4_init_seqid_counter(&lsp->ls_seqid); |
1da177e4 | 771 | atomic_set(&lsp->ls_count, 1); |
b64aec8d | 772 | lsp->ls_state = state; |
77041ed9 TM |
773 | lsp->ls_owner.lo_type = type; |
774 | switch (lsp->ls_owner.lo_type) { | |
775 | case NFS4_FLOCK_LOCK_TYPE: | |
776 | lsp->ls_owner.lo_u.flock_owner = fl_pid; | |
777 | break; | |
778 | case NFS4_POSIX_LOCK_TYPE: | |
779 | lsp->ls_owner.lo_u.posix_owner = fl_owner; | |
780 | break; | |
781 | default: | |
d2d7ce28 | 782 | goto out_free; |
77041ed9 | 783 | } |
48c22eb2 TM |
784 | lsp->ls_seqid.owner_id = ida_simple_get(&server->lockowner_id, 0, 0, GFP_NOFS); |
785 | if (lsp->ls_seqid.owner_id < 0) | |
d2d7ce28 | 786 | goto out_free; |
8d0a8a9d | 787 | INIT_LIST_HEAD(&lsp->ls_locks); |
1da177e4 | 788 | return lsp; |
d2d7ce28 TM |
789 | out_free: |
790 | kfree(lsp); | |
791 | return NULL; | |
1da177e4 LT |
792 | } |
793 | ||
5ae67c4f | 794 | void nfs4_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp) |
9f958ab8 | 795 | { |
48c22eb2 | 796 | ida_simple_remove(&server->lockowner_id, lsp->ls_seqid.owner_id); |
7ba127ab | 797 | nfs4_destroy_seqid_counter(&lsp->ls_seqid); |
9f958ab8 TM |
798 | kfree(lsp); |
799 | } | |
800 | ||
1da177e4 LT |
801 | /* |
802 | * Return a compatible lock_state. If no initialized lock_state structure | |
803 | * exists, return an uninitialized one. | |
804 | * | |
1da177e4 | 805 | */ |
77041ed9 | 806 | static struct nfs4_lock_state *nfs4_get_lock_state(struct nfs4_state *state, fl_owner_t owner, pid_t pid, unsigned int type) |
1da177e4 | 807 | { |
8d0a8a9d | 808 | struct nfs4_lock_state *lsp, *new = NULL; |
1da177e4 | 809 | |
8d0a8a9d TM |
810 | for(;;) { |
811 | spin_lock(&state->state_lock); | |
77041ed9 | 812 | lsp = __nfs4_find_lock_state(state, owner, pid, type); |
8d0a8a9d TM |
813 | if (lsp != NULL) |
814 | break; | |
815 | if (new != NULL) { | |
8d0a8a9d TM |
816 | list_add(&new->ls_locks, &state->lock_states); |
817 | set_bit(LK_STATE_IN_USE, &state->flags); | |
818 | lsp = new; | |
819 | new = NULL; | |
820 | break; | |
821 | } | |
822 | spin_unlock(&state->state_lock); | |
77041ed9 | 823 | new = nfs4_alloc_lock_state(state, owner, pid, type); |
8d0a8a9d TM |
824 | if (new == NULL) |
825 | return NULL; | |
826 | } | |
827 | spin_unlock(&state->state_lock); | |
9f958ab8 | 828 | if (new != NULL) |
5ae67c4f | 829 | nfs4_free_lock_state(state->owner->so_server, new); |
1da177e4 LT |
830 | return lsp; |
831 | } | |
832 | ||
833 | /* | |
8d0a8a9d TM |
834 | * Release reference to lock_state, and free it if we see that |
835 | * it is no longer in use | |
1da177e4 | 836 | */ |
faf5f49c | 837 | void nfs4_put_lock_state(struct nfs4_lock_state *lsp) |
1da177e4 | 838 | { |
8d0a8a9d | 839 | struct nfs4_state *state; |
1da177e4 | 840 | |
8d0a8a9d TM |
841 | if (lsp == NULL) |
842 | return; | |
843 | state = lsp->ls_state; | |
844 | if (!atomic_dec_and_lock(&lsp->ls_count, &state->state_lock)) | |
845 | return; | |
846 | list_del(&lsp->ls_locks); | |
847 | if (list_empty(&state->lock_states)) | |
848 | clear_bit(LK_STATE_IN_USE, &state->flags); | |
849 | spin_unlock(&state->state_lock); | |
cf470c3e TM |
850 | if (lsp->ls_flags & NFS_LOCK_INITIALIZED) { |
851 | if (nfs4_release_lockowner(lsp) == 0) | |
852 | return; | |
853 | } | |
5ae67c4f | 854 | nfs4_free_lock_state(lsp->ls_state->owner->so_server, lsp); |
1da177e4 LT |
855 | } |
856 | ||
8d0a8a9d | 857 | static void nfs4_fl_copy_lock(struct file_lock *dst, struct file_lock *src) |
1da177e4 | 858 | { |
8d0a8a9d | 859 | struct nfs4_lock_state *lsp = src->fl_u.nfs4_fl.owner; |
1da177e4 | 860 | |
8d0a8a9d TM |
861 | dst->fl_u.nfs4_fl.owner = lsp; |
862 | atomic_inc(&lsp->ls_count); | |
863 | } | |
1da177e4 | 864 | |
8d0a8a9d | 865 | static void nfs4_fl_release_lock(struct file_lock *fl) |
1da177e4 | 866 | { |
8d0a8a9d | 867 | nfs4_put_lock_state(fl->fl_u.nfs4_fl.owner); |
1da177e4 LT |
868 | } |
869 | ||
6aed6285 | 870 | static const struct file_lock_operations nfs4_fl_lock_ops = { |
8d0a8a9d TM |
871 | .fl_copy_lock = nfs4_fl_copy_lock, |
872 | .fl_release_private = nfs4_fl_release_lock, | |
873 | }; | |
874 | ||
875 | int nfs4_set_lock_state(struct nfs4_state *state, struct file_lock *fl) | |
1da177e4 | 876 | { |
8d0a8a9d TM |
877 | struct nfs4_lock_state *lsp; |
878 | ||
879 | if (fl->fl_ops != NULL) | |
880 | return 0; | |
77041ed9 TM |
881 | if (fl->fl_flags & FL_POSIX) |
882 | lsp = nfs4_get_lock_state(state, fl->fl_owner, 0, NFS4_POSIX_LOCK_TYPE); | |
883 | else if (fl->fl_flags & FL_FLOCK) | |
17280175 TM |
884 | lsp = nfs4_get_lock_state(state, NULL, fl->fl_pid, |
885 | NFS4_FLOCK_LOCK_TYPE); | |
77041ed9 TM |
886 | else |
887 | return -EINVAL; | |
8d0a8a9d TM |
888 | if (lsp == NULL) |
889 | return -ENOMEM; | |
890 | fl->fl_u.nfs4_fl.owner = lsp; | |
891 | fl->fl_ops = &nfs4_fl_lock_ops; | |
892 | return 0; | |
1da177e4 LT |
893 | } |
894 | ||
4fc8796d TM |
895 | static bool nfs4_copy_lock_stateid(nfs4_stateid *dst, struct nfs4_state *state, |
896 | fl_owner_t fl_owner, pid_t fl_pid) | |
1da177e4 | 897 | { |
8d0a8a9d | 898 | struct nfs4_lock_state *lsp; |
4fc8796d | 899 | bool ret = false; |
1da177e4 | 900 | |
8d0a8a9d | 901 | if (test_bit(LK_STATE_IN_USE, &state->flags) == 0) |
4fc8796d | 902 | goto out; |
1da177e4 | 903 | |
8d0a8a9d | 904 | spin_lock(&state->state_lock); |
77041ed9 | 905 | lsp = __nfs4_find_lock_state(state, fl_owner, fl_pid, NFS4_ANY_LOCK_TYPE); |
4fc8796d | 906 | if (lsp != NULL && (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0) { |
f597c537 | 907 | nfs4_stateid_copy(dst, &lsp->ls_stateid); |
4fc8796d TM |
908 | ret = true; |
909 | } | |
8d0a8a9d | 910 | spin_unlock(&state->state_lock); |
1da177e4 | 911 | nfs4_put_lock_state(lsp); |
4fc8796d TM |
912 | out: |
913 | return ret; | |
914 | } | |
915 | ||
916 | static void nfs4_copy_open_stateid(nfs4_stateid *dst, struct nfs4_state *state) | |
917 | { | |
918 | int seq; | |
919 | ||
920 | do { | |
921 | seq = read_seqbegin(&state->seqlock); | |
922 | nfs4_stateid_copy(dst, &state->stateid); | |
923 | } while (read_seqretry(&state->seqlock, seq)); | |
924 | } | |
925 | ||
926 | /* | |
927 | * Byte-range lock aware utility to initialize the stateid of read/write | |
928 | * requests. | |
929 | */ | |
930 | void nfs4_select_rw_stateid(nfs4_stateid *dst, struct nfs4_state *state, | |
931 | fmode_t fmode, fl_owner_t fl_owner, pid_t fl_pid) | |
932 | { | |
933 | if (nfs4_copy_delegation_stateid(dst, state->inode, fmode)) | |
934 | return; | |
935 | if (nfs4_copy_lock_stateid(dst, state, fl_owner, fl_pid)) | |
936 | return; | |
937 | nfs4_copy_open_stateid(dst, state); | |
1da177e4 LT |
938 | } |
939 | ||
8535b2be | 940 | struct nfs_seqid *nfs_alloc_seqid(struct nfs_seqid_counter *counter, gfp_t gfp_mask) |
cee54fc9 | 941 | { |
cee54fc9 TM |
942 | struct nfs_seqid *new; |
943 | ||
8535b2be | 944 | new = kmalloc(sizeof(*new), gfp_mask); |
cee54fc9 TM |
945 | if (new != NULL) { |
946 | new->sequence = counter; | |
2f74c0a0 | 947 | INIT_LIST_HEAD(&new->list); |
4601df20 | 948 | new->task = NULL; |
cee54fc9 TM |
949 | } |
950 | return new; | |
951 | } | |
952 | ||
72211dbe | 953 | void nfs_release_seqid(struct nfs_seqid *seqid) |
1da177e4 | 954 | { |
4601df20 | 955 | struct nfs_seqid_counter *sequence; |
cee54fc9 | 956 | |
4601df20 TM |
957 | if (list_empty(&seqid->list)) |
958 | return; | |
959 | sequence = seqid->sequence; | |
960 | spin_lock(&sequence->lock); | |
961 | list_del_init(&seqid->list); | |
962 | if (!list_empty(&sequence->list)) { | |
963 | struct nfs_seqid *next; | |
964 | ||
965 | next = list_first_entry(&sequence->list, | |
966 | struct nfs_seqid, list); | |
967 | rpc_wake_up_queued_task(&sequence->wait, next->task); | |
2f74c0a0 | 968 | } |
4601df20 | 969 | spin_unlock(&sequence->lock); |
72211dbe TM |
970 | } |
971 | ||
972 | void nfs_free_seqid(struct nfs_seqid *seqid) | |
973 | { | |
974 | nfs_release_seqid(seqid); | |
cee54fc9 | 975 | kfree(seqid); |
1da177e4 LT |
976 | } |
977 | ||
978 | /* | |
cee54fc9 TM |
979 | * Increment the seqid if the OPEN/OPEN_DOWNGRADE/CLOSE succeeded, or |
980 | * failed with a seqid incrementing error - | |
981 | * see comments nfs_fs.h:seqid_mutating_error() | |
982 | */ | |
88d90939 | 983 | static void nfs_increment_seqid(int status, struct nfs_seqid *seqid) |
cee54fc9 | 984 | { |
7ba127ab | 985 | BUG_ON(list_first_entry(&seqid->sequence->list, struct nfs_seqid, list) != seqid); |
cee54fc9 TM |
986 | switch (status) { |
987 | case 0: | |
988 | break; | |
989 | case -NFS4ERR_BAD_SEQID: | |
6f43ddcc TM |
990 | if (seqid->sequence->flags & NFS_SEQID_CONFIRMED) |
991 | return; | |
9a3ba432 | 992 | pr_warn_ratelimited("NFS: v4 server returned a bad" |
497799e7 DM |
993 | " sequence-id error on an" |
994 | " unconfirmed sequence %p!\n", | |
6f43ddcc | 995 | seqid->sequence); |
cee54fc9 TM |
996 | case -NFS4ERR_STALE_CLIENTID: |
997 | case -NFS4ERR_STALE_STATEID: | |
998 | case -NFS4ERR_BAD_STATEID: | |
999 | case -NFS4ERR_BADXDR: | |
1000 | case -NFS4ERR_RESOURCE: | |
1001 | case -NFS4ERR_NOFILEHANDLE: | |
1002 | /* Non-seqid mutating errors */ | |
1003 | return; | |
1004 | }; | |
1005 | /* | |
1006 | * Note: no locking needed as we are guaranteed to be first | |
1007 | * on the sequence list | |
1008 | */ | |
1009 | seqid->sequence->counter++; | |
1010 | } | |
1011 | ||
1012 | void nfs_increment_open_seqid(int status, struct nfs_seqid *seqid) | |
1013 | { | |
34dc1ad7 BH |
1014 | struct nfs4_state_owner *sp = container_of(seqid->sequence, |
1015 | struct nfs4_state_owner, so_seqid); | |
1016 | struct nfs_server *server = sp->so_server; | |
1017 | ||
1018 | if (status == -NFS4ERR_BAD_SEQID) | |
1da177e4 | 1019 | nfs4_drop_state_owner(sp); |
34dc1ad7 BH |
1020 | if (!nfs4_has_session(server->nfs_client)) |
1021 | nfs_increment_seqid(status, seqid); | |
cee54fc9 TM |
1022 | } |
1023 | ||
1024 | /* | |
cee54fc9 TM |
1025 | * Increment the seqid if the LOCK/LOCKU succeeded, or |
1026 | * failed with a seqid incrementing error - | |
1027 | * see comments nfs_fs.h:seqid_mutating_error() | |
1028 | */ | |
1029 | void nfs_increment_lock_seqid(int status, struct nfs_seqid *seqid) | |
1030 | { | |
88d90939 | 1031 | nfs_increment_seqid(status, seqid); |
cee54fc9 TM |
1032 | } |
1033 | ||
1034 | int nfs_wait_on_sequence(struct nfs_seqid *seqid, struct rpc_task *task) | |
1035 | { | |
7ba127ab | 1036 | struct nfs_seqid_counter *sequence = seqid->sequence; |
cee54fc9 TM |
1037 | int status = 0; |
1038 | ||
1039 | spin_lock(&sequence->lock); | |
4601df20 | 1040 | seqid->task = task; |
2f74c0a0 TM |
1041 | if (list_empty(&seqid->list)) |
1042 | list_add_tail(&seqid->list, &sequence->list); | |
1043 | if (list_first_entry(&sequence->list, struct nfs_seqid, list) == seqid) | |
1044 | goto unlock; | |
5d00837b | 1045 | rpc_sleep_on(&sequence->wait, task, NULL); |
2f74c0a0 TM |
1046 | status = -EAGAIN; |
1047 | unlock: | |
cee54fc9 TM |
1048 | spin_unlock(&sequence->lock); |
1049 | return status; | |
1da177e4 LT |
1050 | } |
1051 | ||
e005e804 | 1052 | static int nfs4_run_state_manager(void *); |
1da177e4 | 1053 | |
e005e804 | 1054 | static void nfs4_clear_state_manager_bit(struct nfs_client *clp) |
433fbe4c TM |
1055 | { |
1056 | smp_mb__before_clear_bit(); | |
e005e804 | 1057 | clear_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state); |
433fbe4c | 1058 | smp_mb__after_clear_bit(); |
e005e804 | 1059 | wake_up_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING); |
433fbe4c TM |
1060 | rpc_wake_up(&clp->cl_rpcwaitq); |
1061 | } | |
1062 | ||
1da177e4 | 1063 | /* |
e005e804 | 1064 | * Schedule the nfs_client asynchronous state management routine |
1da177e4 | 1065 | */ |
b0d3ded1 | 1066 | void nfs4_schedule_state_manager(struct nfs_client *clp) |
1da177e4 | 1067 | { |
5043e900 | 1068 | struct task_struct *task; |
2446ab60 | 1069 | char buf[INET6_ADDRSTRLEN + sizeof("-manager") + 1]; |
1da177e4 | 1070 | |
e005e804 TM |
1071 | if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) != 0) |
1072 | return; | |
5043e900 TM |
1073 | __module_get(THIS_MODULE); |
1074 | atomic_inc(&clp->cl_count); | |
2446ab60 TM |
1075 | |
1076 | /* The rcu_read_lock() is not strictly necessary, as the state | |
1077 | * manager is the only thread that ever changes the rpc_xprt | |
1078 | * after it's initialized. At this point, we're single threaded. */ | |
1079 | rcu_read_lock(); | |
1080 | snprintf(buf, sizeof(buf), "%s-manager", | |
1081 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)); | |
1082 | rcu_read_unlock(); | |
1083 | task = kthread_run(nfs4_run_state_manager, clp, buf); | |
1084 | if (IS_ERR(task)) { | |
1085 | printk(KERN_ERR "%s: kthread_run: %ld\n", | |
1086 | __func__, PTR_ERR(task)); | |
1087 | nfs4_clear_state_manager_bit(clp); | |
1088 | nfs_put_client(clp); | |
1089 | module_put(THIS_MODULE); | |
1090 | } | |
1da177e4 LT |
1091 | } |
1092 | ||
1093 | /* | |
0400a6b0 | 1094 | * Schedule a lease recovery attempt |
1da177e4 | 1095 | */ |
0400a6b0 | 1096 | void nfs4_schedule_lease_recovery(struct nfs_client *clp) |
1da177e4 LT |
1097 | { |
1098 | if (!clp) | |
1099 | return; | |
e598d843 TM |
1100 | if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
1101 | set_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); | |
e005e804 | 1102 | nfs4_schedule_state_manager(clp); |
1da177e4 | 1103 | } |
9cb81968 | 1104 | EXPORT_SYMBOL_GPL(nfs4_schedule_lease_recovery); |
1da177e4 | 1105 | |
ad1e3968 TM |
1106 | /* |
1107 | * nfs40_handle_cb_pathdown - return all delegations after NFS4ERR_CB_PATH_DOWN | |
1108 | * @clp: client to process | |
1109 | * | |
1110 | * Set the NFS4CLNT_LEASE_EXPIRED state in order to force a | |
1111 | * resend of the SETCLIENTID and hence re-establish the | |
1112 | * callback channel. Then return all existing delegations. | |
1113 | */ | |
1114 | static void nfs40_handle_cb_pathdown(struct nfs_client *clp) | |
1115 | { | |
1116 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1117 | nfs_expire_all_delegations(clp); | |
1118 | } | |
1119 | ||
042b60be TM |
1120 | void nfs4_schedule_path_down_recovery(struct nfs_client *clp) |
1121 | { | |
ad1e3968 | 1122 | nfs40_handle_cb_pathdown(clp); |
042b60be TM |
1123 | nfs4_schedule_state_manager(clp); |
1124 | } | |
1125 | ||
f9feab1e | 1126 | static int nfs4_state_mark_reclaim_reboot(struct nfs_client *clp, struct nfs4_state *state) |
b79a4a1b TM |
1127 | { |
1128 | ||
1129 | set_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); | |
1130 | /* Don't recover state that expired before the reboot */ | |
1131 | if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) { | |
1132 | clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); | |
1133 | return 0; | |
1134 | } | |
7eff03ae | 1135 | set_bit(NFS_OWNER_RECLAIM_REBOOT, &state->owner->so_flags); |
b79a4a1b TM |
1136 | set_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state); |
1137 | return 1; | |
1138 | } | |
1139 | ||
f9feab1e | 1140 | static int nfs4_state_mark_reclaim_nograce(struct nfs_client *clp, struct nfs4_state *state) |
b79a4a1b TM |
1141 | { |
1142 | set_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags); | |
1143 | clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); | |
7eff03ae | 1144 | set_bit(NFS_OWNER_RECLAIM_NOGRACE, &state->owner->so_flags); |
b79a4a1b TM |
1145 | set_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state); |
1146 | return 1; | |
1147 | } | |
1148 | ||
0400a6b0 TM |
1149 | void nfs4_schedule_stateid_recovery(const struct nfs_server *server, struct nfs4_state *state) |
1150 | { | |
1151 | struct nfs_client *clp = server->nfs_client; | |
1152 | ||
1153 | nfs4_state_mark_reclaim_nograce(clp, state); | |
1154 | nfs4_schedule_state_manager(clp); | |
1155 | } | |
9cb81968 | 1156 | EXPORT_SYMBOL_GPL(nfs4_schedule_stateid_recovery); |
0400a6b0 | 1157 | |
a1d0b5ee TM |
1158 | void nfs_inode_find_state_and_recover(struct inode *inode, |
1159 | const nfs4_stateid *stateid) | |
1160 | { | |
1161 | struct nfs_client *clp = NFS_SERVER(inode)->nfs_client; | |
1162 | struct nfs_inode *nfsi = NFS_I(inode); | |
1163 | struct nfs_open_context *ctx; | |
1164 | struct nfs4_state *state; | |
1165 | bool found = false; | |
1166 | ||
1167 | spin_lock(&inode->i_lock); | |
1168 | list_for_each_entry(ctx, &nfsi->open_files, list) { | |
1169 | state = ctx->state; | |
1170 | if (state == NULL) | |
1171 | continue; | |
1172 | if (!test_bit(NFS_DELEGATED_STATE, &state->flags)) | |
1173 | continue; | |
f597c537 | 1174 | if (!nfs4_stateid_match(&state->stateid, stateid)) |
a1d0b5ee TM |
1175 | continue; |
1176 | nfs4_state_mark_reclaim_nograce(clp, state); | |
1177 | found = true; | |
1178 | } | |
1179 | spin_unlock(&inode->i_lock); | |
1180 | if (found) | |
1181 | nfs4_schedule_state_manager(clp); | |
1182 | } | |
1183 | ||
1184 | ||
02860014 | 1185 | static int nfs4_reclaim_locks(struct nfs4_state *state, const struct nfs4_state_recovery_ops *ops) |
1da177e4 LT |
1186 | { |
1187 | struct inode *inode = state->inode; | |
19e03c57 | 1188 | struct nfs_inode *nfsi = NFS_I(inode); |
1da177e4 LT |
1189 | struct file_lock *fl; |
1190 | int status = 0; | |
1191 | ||
3f09df70 TM |
1192 | if (inode->i_flock == NULL) |
1193 | return 0; | |
1194 | ||
1195 | /* Guard against delegation returns and new lock/unlock calls */ | |
19e03c57 | 1196 | down_write(&nfsi->rwsem); |
3f09df70 | 1197 | /* Protect inode->i_flock using the BKL */ |
b89f4321 | 1198 | lock_flocks(); |
90dc7d27 | 1199 | for (fl = inode->i_flock; fl != NULL; fl = fl->fl_next) { |
43b2a33a | 1200 | if (!(fl->fl_flags & (FL_POSIX|FL_FLOCK))) |
1da177e4 | 1201 | continue; |
cd3758e3 | 1202 | if (nfs_file_open_context(fl->fl_file)->state != state) |
1da177e4 | 1203 | continue; |
b89f4321 | 1204 | unlock_flocks(); |
1da177e4 | 1205 | status = ops->recover_lock(state, fl); |
1da177e4 | 1206 | switch (status) { |
965b5d67 TM |
1207 | case 0: |
1208 | break; | |
1209 | case -ESTALE: | |
1210 | case -NFS4ERR_ADMIN_REVOKED: | |
1211 | case -NFS4ERR_STALE_STATEID: | |
1212 | case -NFS4ERR_BAD_STATEID: | |
1213 | case -NFS4ERR_EXPIRED: | |
1214 | case -NFS4ERR_NO_GRACE: | |
1215 | case -NFS4ERR_STALE_CLIENTID: | |
9c4c761a TM |
1216 | case -NFS4ERR_BADSESSION: |
1217 | case -NFS4ERR_BADSLOT: | |
1218 | case -NFS4ERR_BAD_HIGH_SLOT: | |
1219 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
965b5d67 | 1220 | goto out; |
1da177e4 | 1221 | default: |
a030889a WAA |
1222 | printk(KERN_ERR "NFS: %s: unhandled error %d. " |
1223 | "Zeroing state\n", __func__, status); | |
965b5d67 TM |
1224 | case -ENOMEM: |
1225 | case -NFS4ERR_DENIED: | |
1da177e4 LT |
1226 | case -NFS4ERR_RECLAIM_BAD: |
1227 | case -NFS4ERR_RECLAIM_CONFLICT: | |
43b2a33a | 1228 | /* kill_proc(fl->fl_pid, SIGLOST, 1); */ |
965b5d67 | 1229 | status = 0; |
1da177e4 | 1230 | } |
b89f4321 | 1231 | lock_flocks(); |
1da177e4 | 1232 | } |
b89f4321 | 1233 | unlock_flocks(); |
965b5d67 | 1234 | out: |
19e03c57 | 1235 | up_write(&nfsi->rwsem); |
1da177e4 LT |
1236 | return status; |
1237 | } | |
1238 | ||
02860014 | 1239 | static int nfs4_reclaim_open_state(struct nfs4_state_owner *sp, const struct nfs4_state_recovery_ops *ops) |
1da177e4 LT |
1240 | { |
1241 | struct nfs4_state *state; | |
1242 | struct nfs4_lock_state *lock; | |
1243 | int status = 0; | |
1244 | ||
1245 | /* Note: we rely on the sp->so_states list being ordered | |
1246 | * so that we always reclaim open(O_RDWR) and/or open(O_WRITE) | |
1247 | * states first. | |
1248 | * This is needed to ensure that the server won't give us any | |
1249 | * read delegations that we have to return if, say, we are | |
1250 | * recovering after a network partition or a reboot from a | |
1251 | * server that doesn't support a grace period. | |
1252 | */ | |
fe1d8195 TM |
1253 | restart: |
1254 | spin_lock(&sp->so_lock); | |
1da177e4 | 1255 | list_for_each_entry(state, &sp->so_states, open_states) { |
b79a4a1b TM |
1256 | if (!test_and_clear_bit(ops->state_flag_bit, &state->flags)) |
1257 | continue; | |
1da177e4 LT |
1258 | if (state->state == 0) |
1259 | continue; | |
fe1d8195 TM |
1260 | atomic_inc(&state->count); |
1261 | spin_unlock(&sp->so_lock); | |
1da177e4 | 1262 | status = ops->recover_open(sp, state); |
1da177e4 | 1263 | if (status >= 0) { |
02860014 TM |
1264 | status = nfs4_reclaim_locks(state, ops); |
1265 | if (status >= 0) { | |
4b44b40e | 1266 | spin_lock(&state->state_lock); |
02860014 TM |
1267 | list_for_each_entry(lock, &state->lock_states, ls_locks) { |
1268 | if (!(lock->ls_flags & NFS_LOCK_INITIALIZED)) | |
96dcadc2 WD |
1269 | pr_warn_ratelimited("NFS: " |
1270 | "%s: Lock reclaim " | |
a030889a | 1271 | "failed!\n", __func__); |
02860014 | 1272 | } |
4b44b40e | 1273 | spin_unlock(&state->state_lock); |
fe1d8195 TM |
1274 | nfs4_put_open_state(state); |
1275 | goto restart; | |
1da177e4 | 1276 | } |
1da177e4 LT |
1277 | } |
1278 | switch (status) { | |
1279 | default: | |
a030889a WAA |
1280 | printk(KERN_ERR "NFS: %s: unhandled error %d. " |
1281 | "Zeroing state\n", __func__, status); | |
1da177e4 | 1282 | case -ENOENT: |
965b5d67 | 1283 | case -ENOMEM: |
b79a4a1b | 1284 | case -ESTALE: |
1da177e4 LT |
1285 | /* |
1286 | * Open state on this file cannot be recovered | |
1287 | * All we can do is revert to using the zero stateid. | |
1288 | */ | |
2d2f24ad TM |
1289 | memset(&state->stateid, 0, |
1290 | sizeof(state->stateid)); | |
1da177e4 LT |
1291 | /* Mark the file as being 'closed' */ |
1292 | state->state = 0; | |
1293 | break; | |
168667c4 TM |
1294 | case -EKEYEXPIRED: |
1295 | /* | |
1296 | * User RPCSEC_GSS context has expired. | |
1297 | * We cannot recover this stateid now, so | |
1298 | * skip it and allow recovery thread to | |
1299 | * proceed. | |
1300 | */ | |
1301 | break; | |
965b5d67 TM |
1302 | case -NFS4ERR_ADMIN_REVOKED: |
1303 | case -NFS4ERR_STALE_STATEID: | |
1304 | case -NFS4ERR_BAD_STATEID: | |
b79a4a1b TM |
1305 | case -NFS4ERR_RECLAIM_BAD: |
1306 | case -NFS4ERR_RECLAIM_CONFLICT: | |
1f0e890d | 1307 | nfs4_state_mark_reclaim_nograce(sp->so_server->nfs_client, state); |
b79a4a1b | 1308 | break; |
1da177e4 LT |
1309 | case -NFS4ERR_EXPIRED: |
1310 | case -NFS4ERR_NO_GRACE: | |
1f0e890d | 1311 | nfs4_state_mark_reclaim_nograce(sp->so_server->nfs_client, state); |
1da177e4 | 1312 | case -NFS4ERR_STALE_CLIENTID: |
9c4c761a TM |
1313 | case -NFS4ERR_BADSESSION: |
1314 | case -NFS4ERR_BADSLOT: | |
1315 | case -NFS4ERR_BAD_HIGH_SLOT: | |
1316 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
1da177e4 LT |
1317 | goto out_err; |
1318 | } | |
fe1d8195 TM |
1319 | nfs4_put_open_state(state); |
1320 | goto restart; | |
1da177e4 | 1321 | } |
fe1d8195 | 1322 | spin_unlock(&sp->so_lock); |
1da177e4 LT |
1323 | return 0; |
1324 | out_err: | |
fe1d8195 | 1325 | nfs4_put_open_state(state); |
1da177e4 LT |
1326 | return status; |
1327 | } | |
1328 | ||
b79a4a1b TM |
1329 | static void nfs4_clear_open_state(struct nfs4_state *state) |
1330 | { | |
1331 | struct nfs4_lock_state *lock; | |
1332 | ||
1333 | clear_bit(NFS_DELEGATED_STATE, &state->flags); | |
1334 | clear_bit(NFS_O_RDONLY_STATE, &state->flags); | |
1335 | clear_bit(NFS_O_WRONLY_STATE, &state->flags); | |
1336 | clear_bit(NFS_O_RDWR_STATE, &state->flags); | |
4b44b40e | 1337 | spin_lock(&state->state_lock); |
b79a4a1b | 1338 | list_for_each_entry(lock, &state->lock_states, ls_locks) { |
b79a4a1b TM |
1339 | lock->ls_seqid.flags = 0; |
1340 | lock->ls_flags &= ~NFS_LOCK_INITIALIZED; | |
1341 | } | |
4b44b40e | 1342 | spin_unlock(&state->state_lock); |
b79a4a1b TM |
1343 | } |
1344 | ||
24d292b8 CL |
1345 | static void nfs4_reset_seqids(struct nfs_server *server, |
1346 | int (*mark_reclaim)(struct nfs_client *clp, struct nfs4_state *state)) | |
cee54fc9 | 1347 | { |
24d292b8 | 1348 | struct nfs_client *clp = server->nfs_client; |
cee54fc9 | 1349 | struct nfs4_state_owner *sp; |
9f958ab8 | 1350 | struct rb_node *pos; |
cee54fc9 | 1351 | struct nfs4_state *state; |
cee54fc9 | 1352 | |
24d292b8 CL |
1353 | spin_lock(&clp->cl_lock); |
1354 | for (pos = rb_first(&server->state_owners); | |
1355 | pos != NULL; | |
1356 | pos = rb_next(pos)) { | |
1357 | sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); | |
cee54fc9 | 1358 | sp->so_seqid.flags = 0; |
ec073428 | 1359 | spin_lock(&sp->so_lock); |
cee54fc9 | 1360 | list_for_each_entry(state, &sp->so_states, open_states) { |
b79a4a1b TM |
1361 | if (mark_reclaim(clp, state)) |
1362 | nfs4_clear_open_state(state); | |
cee54fc9 | 1363 | } |
ec073428 | 1364 | spin_unlock(&sp->so_lock); |
cee54fc9 | 1365 | } |
24d292b8 CL |
1366 | spin_unlock(&clp->cl_lock); |
1367 | } | |
1368 | ||
1369 | static void nfs4_state_mark_reclaim_helper(struct nfs_client *clp, | |
1370 | int (*mark_reclaim)(struct nfs_client *clp, struct nfs4_state *state)) | |
1371 | { | |
1372 | struct nfs_server *server; | |
1373 | ||
1374 | rcu_read_lock(); | |
1375 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) | |
1376 | nfs4_reset_seqids(server, mark_reclaim); | |
1377 | rcu_read_unlock(); | |
cee54fc9 TM |
1378 | } |
1379 | ||
b79a4a1b TM |
1380 | static void nfs4_state_start_reclaim_reboot(struct nfs_client *clp) |
1381 | { | |
1382 | /* Mark all delegations for reclaim */ | |
1383 | nfs_delegation_mark_reclaim(clp); | |
1384 | nfs4_state_mark_reclaim_helper(clp, nfs4_state_mark_reclaim_reboot); | |
1385 | } | |
1386 | ||
fce5c838 RL |
1387 | static void nfs4_reclaim_complete(struct nfs_client *clp, |
1388 | const struct nfs4_state_recovery_ops *ops) | |
1389 | { | |
1390 | /* Notify the server we're done reclaiming our state */ | |
1391 | if (ops->reclaim_complete) | |
1392 | (void)ops->reclaim_complete(clp); | |
1393 | } | |
1394 | ||
24d292b8 | 1395 | static void nfs4_clear_reclaim_server(struct nfs_server *server) |
b79a4a1b | 1396 | { |
24d292b8 | 1397 | struct nfs_client *clp = server->nfs_client; |
b79a4a1b TM |
1398 | struct nfs4_state_owner *sp; |
1399 | struct rb_node *pos; | |
1400 | struct nfs4_state *state; | |
1401 | ||
24d292b8 CL |
1402 | spin_lock(&clp->cl_lock); |
1403 | for (pos = rb_first(&server->state_owners); | |
1404 | pos != NULL; | |
1405 | pos = rb_next(pos)) { | |
1406 | sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); | |
b79a4a1b TM |
1407 | spin_lock(&sp->so_lock); |
1408 | list_for_each_entry(state, &sp->so_states, open_states) { | |
24d292b8 CL |
1409 | if (!test_and_clear_bit(NFS_STATE_RECLAIM_REBOOT, |
1410 | &state->flags)) | |
b79a4a1b TM |
1411 | continue; |
1412 | nfs4_state_mark_reclaim_nograce(clp, state); | |
1413 | } | |
1414 | spin_unlock(&sp->so_lock); | |
1415 | } | |
24d292b8 CL |
1416 | spin_unlock(&clp->cl_lock); |
1417 | } | |
1418 | ||
1419 | static int nfs4_state_clear_reclaim_reboot(struct nfs_client *clp) | |
1420 | { | |
1421 | struct nfs_server *server; | |
1422 | ||
1423 | if (!test_and_clear_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) | |
1424 | return 0; | |
1425 | ||
1426 | rcu_read_lock(); | |
1427 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) | |
1428 | nfs4_clear_reclaim_server(server); | |
1429 | rcu_read_unlock(); | |
b79a4a1b TM |
1430 | |
1431 | nfs_delegation_reap_unclaimed(clp); | |
6eaa6149 TM |
1432 | return 1; |
1433 | } | |
1434 | ||
1435 | static void nfs4_state_end_reclaim_reboot(struct nfs_client *clp) | |
1436 | { | |
1437 | if (!nfs4_state_clear_reclaim_reboot(clp)) | |
1438 | return; | |
1439 | nfs4_reclaim_complete(clp, clp->cl_mvops->reboot_recovery_ops); | |
b79a4a1b TM |
1440 | } |
1441 | ||
1442 | static void nfs_delegation_clear_all(struct nfs_client *clp) | |
1443 | { | |
1444 | nfs_delegation_mark_reclaim(clp); | |
1445 | nfs_delegation_reap_unclaimed(clp); | |
1446 | } | |
1447 | ||
1448 | static void nfs4_state_start_reclaim_nograce(struct nfs_client *clp) | |
1449 | { | |
1450 | nfs_delegation_clear_all(clp); | |
1451 | nfs4_state_mark_reclaim_helper(clp, nfs4_state_mark_reclaim_nograce); | |
1452 | } | |
1453 | ||
168667c4 TM |
1454 | static void nfs4_warn_keyexpired(const char *s) |
1455 | { | |
1456 | printk_ratelimited(KERN_WARNING "Error: state manager" | |
1457 | " encountered RPCSEC_GSS session" | |
1458 | " expired against NFSv4 server %s.\n", | |
1459 | s); | |
1460 | } | |
1461 | ||
4f7cdf18 | 1462 | static int nfs4_recovery_handle_error(struct nfs_client *clp, int error) |
e598d843 TM |
1463 | { |
1464 | switch (error) { | |
4f38e4aa TM |
1465 | case 0: |
1466 | break; | |
e598d843 | 1467 | case -NFS4ERR_CB_PATH_DOWN: |
ad1e3968 | 1468 | nfs40_handle_cb_pathdown(clp); |
4f38e4aa | 1469 | break; |
c8b7ae3d TM |
1470 | case -NFS4ERR_NO_GRACE: |
1471 | nfs4_state_end_reclaim_reboot(clp); | |
4f38e4aa | 1472 | break; |
e598d843 TM |
1473 | case -NFS4ERR_STALE_CLIENTID: |
1474 | case -NFS4ERR_LEASE_MOVED: | |
1475 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
6eaa6149 | 1476 | nfs4_state_clear_reclaim_reboot(clp); |
e598d843 TM |
1477 | nfs4_state_start_reclaim_reboot(clp); |
1478 | break; | |
1479 | case -NFS4ERR_EXPIRED: | |
1480 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1481 | nfs4_state_start_reclaim_nograce(clp); | |
8ba9bf8e | 1482 | break; |
c3fad1b1 AA |
1483 | case -NFS4ERR_BADSESSION: |
1484 | case -NFS4ERR_BADSLOT: | |
1485 | case -NFS4ERR_BAD_HIGH_SLOT: | |
1486 | case -NFS4ERR_DEADSESSION: | |
1487 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
1488 | case -NFS4ERR_SEQ_FALSE_RETRY: | |
1489 | case -NFS4ERR_SEQ_MISORDERED: | |
6df08189 | 1490 | set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); |
0b9e2d41 | 1491 | /* Zero session reset errors */ |
4f38e4aa | 1492 | break; |
168667c4 TM |
1493 | case -EKEYEXPIRED: |
1494 | /* Nothing we can do */ | |
1495 | nfs4_warn_keyexpired(clp->cl_hostname); | |
4f38e4aa TM |
1496 | break; |
1497 | default: | |
1498 | return error; | |
e598d843 | 1499 | } |
4f38e4aa | 1500 | return 0; |
e598d843 TM |
1501 | } |
1502 | ||
02860014 | 1503 | static int nfs4_do_reclaim(struct nfs_client *clp, const struct nfs4_state_recovery_ops *ops) |
1da177e4 | 1504 | { |
24d292b8 CL |
1505 | struct nfs4_state_owner *sp; |
1506 | struct nfs_server *server; | |
9f958ab8 | 1507 | struct rb_node *pos; |
1da177e4 LT |
1508 | int status = 0; |
1509 | ||
7eff03ae | 1510 | restart: |
24d292b8 CL |
1511 | rcu_read_lock(); |
1512 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { | |
0aaaf5c4 | 1513 | nfs4_purge_state_owners(server); |
24d292b8 CL |
1514 | spin_lock(&clp->cl_lock); |
1515 | for (pos = rb_first(&server->state_owners); | |
1516 | pos != NULL; | |
1517 | pos = rb_next(pos)) { | |
1518 | sp = rb_entry(pos, | |
1519 | struct nfs4_state_owner, so_server_node); | |
1520 | if (!test_and_clear_bit(ops->owner_flag_bit, | |
1521 | &sp->so_flags)) | |
1522 | continue; | |
1523 | atomic_inc(&sp->so_count); | |
1524 | spin_unlock(&clp->cl_lock); | |
1525 | rcu_read_unlock(); | |
1526 | ||
1527 | status = nfs4_reclaim_open_state(sp, ops); | |
1528 | if (status < 0) { | |
1529 | set_bit(ops->owner_flag_bit, &sp->so_flags); | |
1530 | nfs4_put_state_owner(sp); | |
1531 | return nfs4_recovery_handle_error(clp, status); | |
1532 | } | |
1533 | ||
7eff03ae | 1534 | nfs4_put_state_owner(sp); |
24d292b8 | 1535 | goto restart; |
7eff03ae | 1536 | } |
24d292b8 | 1537 | spin_unlock(&clp->cl_lock); |
02860014 | 1538 | } |
24d292b8 | 1539 | rcu_read_unlock(); |
02860014 TM |
1540 | return status; |
1541 | } | |
1542 | ||
1543 | static int nfs4_check_lease(struct nfs_client *clp) | |
1544 | { | |
1545 | struct rpc_cred *cred; | |
c48f4f35 TM |
1546 | const struct nfs4_state_maintenance_ops *ops = |
1547 | clp->cl_mvops->state_renewal_ops; | |
4f38e4aa | 1548 | int status; |
1da177e4 | 1549 | |
0f605b56 TM |
1550 | /* Is the client already known to have an expired lease? */ |
1551 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) | |
1552 | return 0; | |
a7b72103 AA |
1553 | spin_lock(&clp->cl_lock); |
1554 | cred = ops->get_state_renewal_cred_locked(clp); | |
1555 | spin_unlock(&clp->cl_lock); | |
0f605b56 TM |
1556 | if (cred == NULL) { |
1557 | cred = nfs4_get_setclientid_cred(clp); | |
4f38e4aa | 1558 | status = -ENOKEY; |
0f605b56 TM |
1559 | if (cred == NULL) |
1560 | goto out; | |
286d7d6a | 1561 | } |
8e69514f | 1562 | status = ops->renew_lease(clp, cred); |
0f605b56 TM |
1563 | put_rpccred(cred); |
1564 | out: | |
4f7cdf18 | 1565 | return nfs4_recovery_handle_error(clp, status); |
02860014 TM |
1566 | } |
1567 | ||
1568 | static int nfs4_reclaim_lease(struct nfs_client *clp) | |
1569 | { | |
1570 | struct rpc_cred *cred; | |
c48f4f35 TM |
1571 | const struct nfs4_state_recovery_ops *ops = |
1572 | clp->cl_mvops->reboot_recovery_ops; | |
02860014 TM |
1573 | int status = -ENOENT; |
1574 | ||
90a16617 | 1575 | cred = ops->get_clid_cred(clp); |
286d7d6a | 1576 | if (cred != NULL) { |
591d71cb | 1577 | status = ops->establish_clid(clp, cred); |
286d7d6a | 1578 | put_rpccred(cred); |
a2b2bb88 TM |
1579 | /* Handle case where the user hasn't set up machine creds */ |
1580 | if (status == -EACCES && cred == clp->cl_machine_cred) { | |
1581 | nfs4_clear_machine_cred(clp); | |
02860014 | 1582 | status = -EAGAIN; |
a2b2bb88 | 1583 | } |
c2e713dd BH |
1584 | if (status == -NFS4ERR_MINOR_VERS_MISMATCH) |
1585 | status = -EPROTONOSUPPORT; | |
286d7d6a | 1586 | } |
02860014 TM |
1587 | return status; |
1588 | } | |
1589 | ||
76db6d95 | 1590 | #ifdef CONFIG_NFS_V4_1 |
0400a6b0 TM |
1591 | void nfs4_schedule_session_recovery(struct nfs4_session *session) |
1592 | { | |
444f72fe TM |
1593 | struct nfs_client *clp = session->clp; |
1594 | ||
1595 | set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); | |
1596 | nfs4_schedule_lease_recovery(clp); | |
0400a6b0 | 1597 | } |
cbdabc7f | 1598 | EXPORT_SYMBOL_GPL(nfs4_schedule_session_recovery); |
0400a6b0 | 1599 | |
b9efa1b2 AA |
1600 | void nfs41_handle_recall_slot(struct nfs_client *clp) |
1601 | { | |
1602 | set_bit(NFS4CLNT_RECALL_SLOT, &clp->cl_state); | |
0400a6b0 | 1603 | nfs4_schedule_state_manager(clp); |
b9efa1b2 AA |
1604 | } |
1605 | ||
0f79fd6f TM |
1606 | static void nfs4_reset_all_state(struct nfs_client *clp) |
1607 | { | |
1608 | if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) == 0) { | |
1609 | clp->cl_boot_time = CURRENT_TIME; | |
1610 | nfs4_state_start_reclaim_nograce(clp); | |
0400a6b0 | 1611 | nfs4_schedule_state_manager(clp); |
0f79fd6f TM |
1612 | } |
1613 | } | |
1614 | ||
1615 | static void nfs41_handle_server_reboot(struct nfs_client *clp) | |
1616 | { | |
1617 | if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) == 0) { | |
1618 | nfs4_state_start_reclaim_reboot(clp); | |
0400a6b0 | 1619 | nfs4_schedule_state_manager(clp); |
0f79fd6f TM |
1620 | } |
1621 | } | |
1622 | ||
1623 | static void nfs41_handle_state_revoked(struct nfs_client *clp) | |
1624 | { | |
1625 | /* Temporary */ | |
1626 | nfs4_reset_all_state(clp); | |
1627 | } | |
1628 | ||
1629 | static void nfs41_handle_recallable_state_revoked(struct nfs_client *clp) | |
1630 | { | |
1631 | /* This will need to handle layouts too */ | |
1632 | nfs_expire_all_delegations(clp); | |
1633 | } | |
1634 | ||
1635 | static void nfs41_handle_cb_path_down(struct nfs_client *clp) | |
1636 | { | |
1637 | nfs_expire_all_delegations(clp); | |
1638 | if (test_and_set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state) == 0) | |
0400a6b0 | 1639 | nfs4_schedule_state_manager(clp); |
0f79fd6f TM |
1640 | } |
1641 | ||
0629e370 AB |
1642 | void nfs41_handle_sequence_flag_errors(struct nfs_client *clp, u32 flags) |
1643 | { | |
1644 | if (!flags) | |
1645 | return; | |
111d489f | 1646 | if (flags & SEQ4_STATUS_RESTART_RECLAIM_NEEDED) |
0f79fd6f | 1647 | nfs41_handle_server_reboot(clp); |
111d489f | 1648 | if (flags & (SEQ4_STATUS_EXPIRED_ALL_STATE_REVOKED | |
0629e370 AB |
1649 | SEQ4_STATUS_EXPIRED_SOME_STATE_REVOKED | |
1650 | SEQ4_STATUS_ADMIN_STATE_REVOKED | | |
0f79fd6f TM |
1651 | SEQ4_STATUS_LEASE_MOVED)) |
1652 | nfs41_handle_state_revoked(clp); | |
111d489f | 1653 | if (flags & SEQ4_STATUS_RECALLABLE_STATE_REVOKED) |
0f79fd6f | 1654 | nfs41_handle_recallable_state_revoked(clp); |
111d489f | 1655 | if (flags & (SEQ4_STATUS_CB_PATH_DOWN | |
0629e370 AB |
1656 | SEQ4_STATUS_BACKCHANNEL_FAULT | |
1657 | SEQ4_STATUS_CB_PATH_DOWN_SESSION)) | |
0f79fd6f | 1658 | nfs41_handle_cb_path_down(clp); |
0629e370 AB |
1659 | } |
1660 | ||
c3fad1b1 AA |
1661 | static int nfs4_reset_session(struct nfs_client *clp) |
1662 | { | |
1663 | int status; | |
1664 | ||
38045412 | 1665 | nfs4_begin_drain_session(clp); |
c3fad1b1 AA |
1666 | status = nfs4_proc_destroy_session(clp->cl_session); |
1667 | if (status && status != -NFS4ERR_BADSESSION && | |
1668 | status != -NFS4ERR_DEADSESSION) { | |
f455848a | 1669 | status = nfs4_recovery_handle_error(clp, status); |
c3fad1b1 AA |
1670 | goto out; |
1671 | } | |
1672 | ||
1673 | memset(clp->cl_session->sess_id.data, 0, NFS4_MAX_SESSIONID_LEN); | |
f26468fb | 1674 | status = nfs4_proc_create_session(clp); |
41f54a55 | 1675 | if (status) { |
f455848a | 1676 | status = nfs4_recovery_handle_error(clp, status); |
41f54a55 AA |
1677 | goto out; |
1678 | } | |
444f72fe | 1679 | clear_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); |
41f54a55 AA |
1680 | /* create_session negotiated new slot table */ |
1681 | clear_bit(NFS4CLNT_RECALL_SLOT, &clp->cl_state); | |
9dfdf404 | 1682 | |
41f54a55 AA |
1683 | /* Let the state manager reestablish state */ |
1684 | if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) | |
5601a00d | 1685 | nfs41_setup_state_renewal(clp); |
41f54a55 | 1686 | out: |
c3fad1b1 AA |
1687 | return status; |
1688 | } | |
76db6d95 | 1689 | |
b9efa1b2 AA |
1690 | static int nfs4_recall_slot(struct nfs_client *clp) |
1691 | { | |
1692 | struct nfs4_slot_table *fc_tbl = &clp->cl_session->fc_slot_table; | |
1693 | struct nfs4_channel_attrs *fc_attrs = &clp->cl_session->fc_attrs; | |
1694 | struct nfs4_slot *new, *old; | |
1695 | int i; | |
1696 | ||
1697 | nfs4_begin_drain_session(clp); | |
1698 | new = kmalloc(fc_tbl->target_max_slots * sizeof(struct nfs4_slot), | |
8535b2be | 1699 | GFP_NOFS); |
b9efa1b2 AA |
1700 | if (!new) |
1701 | return -ENOMEM; | |
1702 | ||
1703 | spin_lock(&fc_tbl->slot_tbl_lock); | |
1704 | for (i = 0; i < fc_tbl->target_max_slots; i++) | |
1705 | new[i].seq_nr = fc_tbl->slots[i].seq_nr; | |
1706 | old = fc_tbl->slots; | |
1707 | fc_tbl->slots = new; | |
1708 | fc_tbl->max_slots = fc_tbl->target_max_slots; | |
1709 | fc_tbl->target_max_slots = 0; | |
1710 | fc_attrs->max_reqs = fc_tbl->max_slots; | |
1711 | spin_unlock(&fc_tbl->slot_tbl_lock); | |
1712 | ||
1713 | kfree(old); | |
1714 | nfs4_end_drain_session(clp); | |
1715 | return 0; | |
1716 | } | |
1717 | ||
76db6d95 | 1718 | #else /* CONFIG_NFS_V4_1 */ |
c3fad1b1 | 1719 | static int nfs4_reset_session(struct nfs_client *clp) { return 0; } |
5601a00d | 1720 | static int nfs4_end_drain_session(struct nfs_client *clp) { return 0; } |
b9efa1b2 | 1721 | static int nfs4_recall_slot(struct nfs_client *clp) { return 0; } |
76db6d95 AA |
1722 | #endif /* CONFIG_NFS_V4_1 */ |
1723 | ||
78722e9c AA |
1724 | /* Set NFS4CLNT_LEASE_EXPIRED for all v4.0 errors and for recoverable errors |
1725 | * on EXCHANGE_ID for v4.1 | |
1726 | */ | |
1727 | static void nfs4_set_lease_expired(struct nfs_client *clp, int status) | |
1728 | { | |
fd954ae1 TM |
1729 | switch (status) { |
1730 | case -NFS4ERR_CLID_INUSE: | |
1731 | case -NFS4ERR_STALE_CLIENTID: | |
1732 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); | |
1733 | break; | |
1734 | case -NFS4ERR_DELAY: | |
1bd714f2 | 1735 | case -ETIMEDOUT: |
fd954ae1 TM |
1736 | case -EAGAIN: |
1737 | ssleep(1); | |
1738 | break; | |
78722e9c | 1739 | |
fd954ae1 TM |
1740 | case -EKEYEXPIRED: |
1741 | nfs4_warn_keyexpired(clp->cl_hostname); | |
1742 | case -NFS4ERR_NOT_SAME: /* FixMe: implement recovery | |
1743 | * in nfs4_exchange_id */ | |
1744 | default: | |
1745 | return; | |
78722e9c AA |
1746 | } |
1747 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1748 | } | |
1749 | ||
e005e804 | 1750 | static void nfs4_state_manager(struct nfs_client *clp) |
02860014 | 1751 | { |
02860014 TM |
1752 | int status = 0; |
1753 | ||
02860014 | 1754 | /* Ensure exclusive access to NFSv4 state */ |
47c2199b | 1755 | do { |
b79a4a1b TM |
1756 | if (test_and_clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) { |
1757 | /* We're going to have to re-establish a clientid */ | |
1758 | status = nfs4_reclaim_lease(clp); | |
1759 | if (status) { | |
78722e9c | 1760 | nfs4_set_lease_expired(clp, status); |
b6d408ba TM |
1761 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, |
1762 | &clp->cl_state)) | |
b79a4a1b | 1763 | continue; |
76db6d95 AA |
1764 | if (clp->cl_cons_state == |
1765 | NFS_CS_SESSION_INITING) | |
1766 | nfs_mark_client_ready(clp, status); | |
b79a4a1b TM |
1767 | goto out_error; |
1768 | } | |
e598d843 | 1769 | clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); |
78fe0f41 WAA |
1770 | |
1771 | if (test_and_clear_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, | |
1772 | &clp->cl_state)) | |
1773 | nfs4_state_start_reclaim_nograce(clp); | |
1774 | else | |
1775 | set_bit(NFS4CLNT_RECLAIM_REBOOT, | |
1776 | &clp->cl_state); | |
1777 | ||
974cec8c | 1778 | pnfs_destroy_all_layouts(clp); |
e598d843 TM |
1779 | } |
1780 | ||
1781 | if (test_and_clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state)) { | |
1782 | status = nfs4_check_lease(clp); | |
4f38e4aa TM |
1783 | if (status < 0) |
1784 | goto out_error; | |
b6d408ba | 1785 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
e598d843 | 1786 | continue; |
b79a4a1b | 1787 | } |
b6d408ba | 1788 | |
c3fad1b1 | 1789 | /* Initialize or reset the session */ |
6df08189 | 1790 | if (test_and_clear_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state) |
7111dc73 | 1791 | && nfs4_has_session(clp)) { |
4d643d1d | 1792 | status = nfs4_reset_session(clp); |
b6d408ba TM |
1793 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
1794 | continue; | |
1795 | if (status < 0) | |
76db6d95 | 1796 | goto out_error; |
76db6d95 | 1797 | } |
b6d408ba | 1798 | |
b79a4a1b | 1799 | /* First recover reboot state... */ |
e345e88a | 1800 | if (test_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) { |
591d71cb | 1801 | status = nfs4_do_reclaim(clp, |
c48f4f35 | 1802 | clp->cl_mvops->reboot_recovery_ops); |
b6d408ba | 1803 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) || |
6df08189 | 1804 | test_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state)) |
c3fad1b1 | 1805 | continue; |
b79a4a1b | 1806 | nfs4_state_end_reclaim_reboot(clp); |
b6d408ba TM |
1807 | if (test_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) |
1808 | continue; | |
1809 | if (status < 0) | |
1810 | goto out_error; | |
02860014 TM |
1811 | } |
1812 | ||
b79a4a1b TM |
1813 | /* Now recover expired state... */ |
1814 | if (test_and_clear_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) { | |
591d71cb | 1815 | status = nfs4_do_reclaim(clp, |
c48f4f35 | 1816 | clp->cl_mvops->nograce_recovery_ops); |
b6d408ba | 1817 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) || |
6df08189 | 1818 | test_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state) || |
b6d408ba TM |
1819 | test_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) |
1820 | continue; | |
1821 | if (status < 0) | |
b79a4a1b | 1822 | goto out_error; |
1da177e4 | 1823 | } |
707fb4b3 | 1824 | |
5601a00d | 1825 | nfs4_end_drain_session(clp); |
707fb4b3 TM |
1826 | if (test_and_clear_bit(NFS4CLNT_DELEGRETURN, &clp->cl_state)) { |
1827 | nfs_client_return_marked_delegations(clp); | |
1828 | continue; | |
1829 | } | |
b9efa1b2 AA |
1830 | /* Recall session slots */ |
1831 | if (test_and_clear_bit(NFS4CLNT_RECALL_SLOT, &clp->cl_state) | |
1832 | && nfs4_has_session(clp)) { | |
1833 | status = nfs4_recall_slot(clp); | |
1834 | if (status < 0) | |
1835 | goto out_error; | |
1836 | continue; | |
1837 | } | |
1838 | ||
e005e804 TM |
1839 | |
1840 | nfs4_clear_state_manager_bit(clp); | |
f3c76491 TM |
1841 | /* Did we race with an attempt to give us more work? */ |
1842 | if (clp->cl_state == 0) | |
1843 | break; | |
1844 | if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) != 0) | |
1845 | break; | |
47c2199b | 1846 | } while (atomic_read(&clp->cl_count) > 1); |
e005e804 | 1847 | return; |
1da177e4 | 1848 | out_error: |
9a3ba432 | 1849 | pr_warn_ratelimited("NFS: state manager failed on NFSv4 server %s" |
5d8515ca | 1850 | " with error %d\n", clp->cl_hostname, -status); |
5601a00d | 1851 | nfs4_end_drain_session(clp); |
e005e804 TM |
1852 | nfs4_clear_state_manager_bit(clp); |
1853 | } | |
1854 | ||
1855 | static int nfs4_run_state_manager(void *ptr) | |
1856 | { | |
1857 | struct nfs_client *clp = ptr; | |
1858 | ||
1859 | allow_signal(SIGKILL); | |
1860 | nfs4_state_manager(clp); | |
1861 | nfs_put_client(clp); | |
1862 | module_put_and_exit(0); | |
1863 | return 0; | |
1da177e4 LT |
1864 | } |
1865 | ||
1866 | /* | |
1867 | * Local variables: | |
1868 | * c-basic-offset: 8 | |
1869 | * End: | |
1870 | */ |