]>
Commit | Line | Data |
---|---|---|
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 | |
05f4c350 CL |
54 | #include <linux/sunrpc/clnt.h> |
55 | ||
4ce79717 | 56 | #include "nfs4_fs.h" |
1da177e4 LT |
57 | #include "callback.h" |
58 | #include "delegation.h" | |
24c8dbbb | 59 | #include "internal.h" |
76e697ba | 60 | #include "nfs4session.h" |
974cec8c | 61 | #include "pnfs.h" |
bbe0a3aa | 62 | #include "netns.h" |
1da177e4 | 63 | |
e3c0fb7e CL |
64 | #define NFSDBG_FACILITY NFSDBG_STATE |
65 | ||
1da177e4 LT |
66 | #define OPENOWNER_POOL_SIZE 8 |
67 | ||
4ce79717 | 68 | const nfs4_stateid zero_stateid; |
05f4c350 | 69 | static DEFINE_MUTEX(nfs_clid_init_mutex); |
1da177e4 LT |
70 | static LIST_HEAD(nfs4_clientid_list); |
71 | ||
591d71cb | 72 | int nfs4_init_clientid(struct nfs_client *clp, struct rpc_cred *cred) |
1da177e4 | 73 | { |
fd954ae1 TM |
74 | struct nfs4_setclientid_res clid = { |
75 | .clientid = clp->cl_clientid, | |
76 | .confirm = clp->cl_confirm, | |
77 | }; | |
f738f517 CL |
78 | unsigned short port; |
79 | int status; | |
bbe0a3aa | 80 | struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); |
f738f517 | 81 | |
fd954ae1 TM |
82 | if (test_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state)) |
83 | goto do_confirm; | |
bbe0a3aa | 84 | port = nn->nfs_callback_tcpport; |
f738f517 | 85 | if (clp->cl_addr.ss_family == AF_INET6) |
29dcc16a | 86 | port = nn->nfs_callback_tcpport6; |
f738f517 | 87 | |
bb8b27e5 TM |
88 | status = nfs4_proc_setclientid(clp, NFS4_CALLBACK, port, cred, &clid); |
89 | if (status != 0) | |
90 | goto out; | |
fd954ae1 TM |
91 | clp->cl_clientid = clid.clientid; |
92 | clp->cl_confirm = clid.confirm; | |
93 | set_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); | |
94 | do_confirm: | |
bb8b27e5 TM |
95 | status = nfs4_proc_setclientid_confirm(clp, &clid, cred); |
96 | if (status != 0) | |
97 | goto out; | |
fd954ae1 | 98 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
bb8b27e5 TM |
99 | nfs4_schedule_state_renewal(clp); |
100 | out: | |
1da177e4 LT |
101 | return status; |
102 | } | |
103 | ||
05f4c350 CL |
104 | /** |
105 | * nfs40_discover_server_trunking - Detect server IP address trunking (mv0) | |
106 | * | |
107 | * @clp: nfs_client under test | |
108 | * @result: OUT: found nfs_client, or clp | |
109 | * @cred: credential to use for trunking test | |
110 | * | |
111 | * Returns zero, a negative errno, or a negative NFS4ERR status. | |
112 | * If zero is returned, an nfs_client pointer is planted in | |
113 | * "result". | |
114 | * | |
115 | * Note: The returned client may not yet be marked ready. | |
116 | */ | |
117 | int nfs40_discover_server_trunking(struct nfs_client *clp, | |
118 | struct nfs_client **result, | |
119 | struct rpc_cred *cred) | |
120 | { | |
121 | struct nfs4_setclientid_res clid = { | |
122 | .clientid = clp->cl_clientid, | |
123 | .confirm = clp->cl_confirm, | |
124 | }; | |
9f62387d | 125 | struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); |
05f4c350 CL |
126 | unsigned short port; |
127 | int status; | |
128 | ||
9f62387d | 129 | port = nn->nfs_callback_tcpport; |
05f4c350 | 130 | if (clp->cl_addr.ss_family == AF_INET6) |
9f62387d | 131 | port = nn->nfs_callback_tcpport6; |
05f4c350 CL |
132 | |
133 | status = nfs4_proc_setclientid(clp, NFS4_CALLBACK, port, cred, &clid); | |
134 | if (status != 0) | |
135 | goto out; | |
136 | clp->cl_clientid = clid.clientid; | |
137 | clp->cl_confirm = clid.confirm; | |
138 | ||
139 | status = nfs40_walk_client_list(clp, result, cred); | |
140 | switch (status) { | |
141 | case -NFS4ERR_STALE_CLIENTID: | |
142 | set_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); | |
143 | case 0: | |
144 | /* Sustain the lease, even if it's empty. If the clientid4 | |
145 | * goes stale it's of no use for trunking discovery. */ | |
146 | nfs4_schedule_state_renewal(*result); | |
147 | break; | |
148 | } | |
149 | ||
150 | out: | |
151 | return status; | |
152 | } | |
153 | ||
a7b72103 | 154 | struct rpc_cred *nfs4_get_machine_cred_locked(struct nfs_client *clp) |
a2b2bb88 TM |
155 | { |
156 | struct rpc_cred *cred = NULL; | |
157 | ||
a2b2bb88 TM |
158 | if (clp->cl_machine_cred != NULL) |
159 | cred = get_rpccred(clp->cl_machine_cred); | |
a2b2bb88 TM |
160 | return cred; |
161 | } | |
162 | ||
163 | static void nfs4_clear_machine_cred(struct nfs_client *clp) | |
164 | { | |
165 | struct rpc_cred *cred; | |
166 | ||
167 | spin_lock(&clp->cl_lock); | |
168 | cred = clp->cl_machine_cred; | |
169 | clp->cl_machine_cred = NULL; | |
170 | spin_unlock(&clp->cl_lock); | |
171 | if (cred != NULL) | |
172 | put_rpccred(cred); | |
173 | } | |
174 | ||
24d292b8 CL |
175 | static struct rpc_cred * |
176 | nfs4_get_renew_cred_server_locked(struct nfs_server *server) | |
b4454fe1 | 177 | { |
24d292b8 | 178 | struct rpc_cred *cred = NULL; |
b4454fe1 | 179 | struct nfs4_state_owner *sp; |
9f958ab8 | 180 | struct rb_node *pos; |
b4454fe1 | 181 | |
24d292b8 CL |
182 | for (pos = rb_first(&server->state_owners); |
183 | pos != NULL; | |
184 | pos = rb_next(pos)) { | |
185 | sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); | |
b4454fe1 TM |
186 | if (list_empty(&sp->so_states)) |
187 | continue; | |
188 | cred = get_rpccred(sp->so_cred); | |
189 | break; | |
190 | } | |
191 | return cred; | |
192 | } | |
193 | ||
24d292b8 CL |
194 | /** |
195 | * nfs4_get_renew_cred_locked - Acquire credential for a renew operation | |
196 | * @clp: client state handle | |
197 | * | |
198 | * Returns an rpc_cred with reference count bumped, or NULL. | |
199 | * Caller must hold clp->cl_lock. | |
200 | */ | |
201 | struct rpc_cred *nfs4_get_renew_cred_locked(struct nfs_client *clp) | |
202 | { | |
203 | struct rpc_cred *cred = NULL; | |
204 | struct nfs_server *server; | |
205 | ||
e49a29bd SP |
206 | /* Use machine credentials if available */ |
207 | cred = nfs4_get_machine_cred_locked(clp); | |
208 | if (cred != NULL) | |
209 | goto out; | |
210 | ||
24d292b8 CL |
211 | rcu_read_lock(); |
212 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { | |
213 | cred = nfs4_get_renew_cred_server_locked(server); | |
214 | if (cred != NULL) | |
215 | break; | |
216 | } | |
217 | rcu_read_unlock(); | |
e49a29bd SP |
218 | |
219 | out: | |
24d292b8 CL |
220 | return cred; |
221 | } | |
222 | ||
b4b82607 AA |
223 | #if defined(CONFIG_NFS_V4_1) |
224 | ||
9430fb6b RL |
225 | static int nfs41_setup_state_renewal(struct nfs_client *clp) |
226 | { | |
227 | int status; | |
228 | struct nfs_fsinfo fsinfo; | |
229 | ||
d6fb79d4 AA |
230 | if (!test_bit(NFS_CS_CHECK_LEASE_TIME, &clp->cl_res_state)) { |
231 | nfs4_schedule_state_renewal(clp); | |
232 | return 0; | |
233 | } | |
234 | ||
9430fb6b RL |
235 | status = nfs4_proc_get_lease_time(clp, &fsinfo); |
236 | if (status == 0) { | |
237 | /* Update lease time and schedule renewal */ | |
238 | spin_lock(&clp->cl_lock); | |
239 | clp->cl_lease_time = fsinfo.lease_time * HZ; | |
240 | clp->cl_last_renewal = jiffies; | |
241 | spin_unlock(&clp->cl_lock); | |
242 | ||
243 | nfs4_schedule_state_renewal(clp); | |
244 | } | |
245 | ||
246 | return status; | |
247 | } | |
248 | ||
42acd021 AA |
249 | /* |
250 | * Back channel returns NFS4ERR_DELAY for new requests when | |
251 | * NFS4_SESSION_DRAINING is set so there is no work to be done when draining | |
252 | * is ended. | |
253 | */ | |
5601a00d | 254 | static void nfs4_end_drain_session(struct nfs_client *clp) |
9dfdf404 | 255 | { |
5601a00d | 256 | struct nfs4_session *ses = clp->cl_session; |
961a828d | 257 | struct nfs4_slot_table *tbl; |
97e548a9 | 258 | unsigned int i; |
689cf5c1 | 259 | |
a2118c33 TM |
260 | if (ses == NULL) |
261 | return; | |
961a828d | 262 | tbl = &ses->fc_slot_table; |
a2118c33 | 263 | if (test_and_clear_bit(NFS4_SESSION_DRAINING, &ses->session_state)) { |
961a828d | 264 | spin_lock(&tbl->slot_tbl_lock); |
97e548a9 | 265 | for (i = 0; i <= tbl->max_slotid; i++) { |
961a828d TM |
266 | if (rpc_wake_up_first(&tbl->slot_tbl_waitq, |
267 | nfs4_set_task_privileged, | |
268 | NULL) == NULL) | |
689cf5c1 | 269 | break; |
689cf5c1 | 270 | } |
961a828d | 271 | spin_unlock(&tbl->slot_tbl_lock); |
689cf5c1 | 272 | } |
9dfdf404 RL |
273 | } |
274 | ||
5d63360d TM |
275 | /* |
276 | * Signal state manager thread if session fore channel is drained | |
277 | */ | |
278 | void nfs4_session_drain_complete(struct nfs4_session *session, | |
279 | struct nfs4_slot_table *tbl) | |
280 | { | |
281 | if (nfs4_session_draining(session)) | |
282 | complete(&tbl->complete); | |
283 | } | |
284 | ||
42acd021 | 285 | static int nfs4_wait_on_slot_tbl(struct nfs4_slot_table *tbl) |
9dfdf404 | 286 | { |
9dfdf404 | 287 | spin_lock(&tbl->slot_tbl_lock); |
b6bf6e7d | 288 | if (tbl->highest_used_slotid != NFS4_NO_SLOT) { |
42acd021 | 289 | INIT_COMPLETION(tbl->complete); |
9dfdf404 | 290 | spin_unlock(&tbl->slot_tbl_lock); |
42acd021 | 291 | return wait_for_completion_interruptible(&tbl->complete); |
9dfdf404 RL |
292 | } |
293 | spin_unlock(&tbl->slot_tbl_lock); | |
294 | return 0; | |
295 | } | |
296 | ||
42acd021 AA |
297 | static int nfs4_begin_drain_session(struct nfs_client *clp) |
298 | { | |
299 | struct nfs4_session *ses = clp->cl_session; | |
300 | int ret = 0; | |
301 | ||
302 | set_bit(NFS4_SESSION_DRAINING, &ses->session_state); | |
303 | /* back channel */ | |
304 | ret = nfs4_wait_on_slot_tbl(&ses->bc_slot_table); | |
305 | if (ret) | |
306 | return ret; | |
307 | /* fore channel */ | |
308 | return nfs4_wait_on_slot_tbl(&ses->fc_slot_table); | |
309 | } | |
310 | ||
bda197f5 TM |
311 | static void nfs41_finish_session_reset(struct nfs_client *clp) |
312 | { | |
313 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); | |
314 | clear_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); | |
315 | /* create_session negotiated new slot table */ | |
bda197f5 TM |
316 | clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); |
317 | nfs41_setup_state_renewal(clp); | |
318 | } | |
319 | ||
4d643d1d AA |
320 | int nfs41_init_clientid(struct nfs_client *clp, struct rpc_cred *cred) |
321 | { | |
322 | int status; | |
323 | ||
fd954ae1 TM |
324 | if (test_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state)) |
325 | goto do_confirm; | |
38045412 | 326 | nfs4_begin_drain_session(clp); |
4d643d1d | 327 | status = nfs4_proc_exchange_id(clp, cred); |
9430fb6b RL |
328 | if (status != 0) |
329 | goto out; | |
fd954ae1 TM |
330 | set_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
331 | do_confirm: | |
848f5bda | 332 | status = nfs4_proc_create_session(clp, cred); |
9430fb6b RL |
333 | if (status != 0) |
334 | goto out; | |
bda197f5 | 335 | nfs41_finish_session_reset(clp); |
9430fb6b RL |
336 | nfs_mark_client_ready(clp, NFS_CS_READY); |
337 | out: | |
4d643d1d AA |
338 | return status; |
339 | } | |
340 | ||
05f4c350 CL |
341 | /** |
342 | * nfs41_discover_server_trunking - Detect server IP address trunking (mv1) | |
343 | * | |
344 | * @clp: nfs_client under test | |
345 | * @result: OUT: found nfs_client, or clp | |
346 | * @cred: credential to use for trunking test | |
347 | * | |
348 | * Returns NFS4_OK, a negative errno, or a negative NFS4ERR status. | |
349 | * If NFS4_OK is returned, an nfs_client pointer is planted in | |
350 | * "result". | |
351 | * | |
352 | * Note: The returned client may not yet be marked ready. | |
353 | */ | |
354 | int nfs41_discover_server_trunking(struct nfs_client *clp, | |
355 | struct nfs_client **result, | |
356 | struct rpc_cred *cred) | |
357 | { | |
358 | int status; | |
359 | ||
360 | status = nfs4_proc_exchange_id(clp, cred); | |
361 | if (status != NFS4_OK) | |
362 | return status; | |
fd483570 | 363 | set_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
05f4c350 CL |
364 | |
365 | return nfs41_walk_client_list(clp, result, cred); | |
366 | } | |
367 | ||
b4b82607 AA |
368 | struct rpc_cred *nfs4_get_exchange_id_cred(struct nfs_client *clp) |
369 | { | |
370 | struct rpc_cred *cred; | |
371 | ||
372 | spin_lock(&clp->cl_lock); | |
373 | cred = nfs4_get_machine_cred_locked(clp); | |
374 | spin_unlock(&clp->cl_lock); | |
375 | return cred; | |
376 | } | |
377 | ||
378 | #endif /* CONFIG_NFS_V4_1 */ | |
379 | ||
24d292b8 CL |
380 | static struct rpc_cred * |
381 | nfs4_get_setclientid_cred_server(struct nfs_server *server) | |
286d7d6a | 382 | { |
24d292b8 CL |
383 | struct nfs_client *clp = server->nfs_client; |
384 | struct rpc_cred *cred = NULL; | |
286d7d6a | 385 | struct nfs4_state_owner *sp; |
9f958ab8 | 386 | struct rb_node *pos; |
24d292b8 CL |
387 | |
388 | spin_lock(&clp->cl_lock); | |
389 | pos = rb_first(&server->state_owners); | |
390 | if (pos != NULL) { | |
391 | sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); | |
392 | cred = get_rpccred(sp->so_cred); | |
393 | } | |
394 | spin_unlock(&clp->cl_lock); | |
395 | return cred; | |
396 | } | |
397 | ||
398 | /** | |
399 | * nfs4_get_setclientid_cred - Acquire credential for a setclientid operation | |
400 | * @clp: client state handle | |
401 | * | |
402 | * Returns an rpc_cred with reference count bumped, or NULL. | |
403 | */ | |
404 | struct rpc_cred *nfs4_get_setclientid_cred(struct nfs_client *clp) | |
405 | { | |
406 | struct nfs_server *server; | |
a2b2bb88 | 407 | struct rpc_cred *cred; |
286d7d6a | 408 | |
6dc9d57a TM |
409 | spin_lock(&clp->cl_lock); |
410 | cred = nfs4_get_machine_cred_locked(clp); | |
24d292b8 | 411 | spin_unlock(&clp->cl_lock); |
a2b2bb88 TM |
412 | if (cred != NULL) |
413 | goto out; | |
24d292b8 CL |
414 | |
415 | rcu_read_lock(); | |
416 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { | |
417 | cred = nfs4_get_setclientid_cred_server(server); | |
418 | if (cred != NULL) | |
419 | break; | |
286d7d6a | 420 | } |
24d292b8 CL |
421 | rcu_read_unlock(); |
422 | ||
a2b2bb88 TM |
423 | out: |
424 | return cred; | |
286d7d6a TM |
425 | } |
426 | ||
1da177e4 | 427 | static struct nfs4_state_owner * |
24d292b8 | 428 | nfs4_find_state_owner_locked(struct nfs_server *server, struct rpc_cred *cred) |
1da177e4 | 429 | { |
24d292b8 | 430 | struct rb_node **p = &server->state_owners.rb_node, |
9f958ab8 | 431 | *parent = NULL; |
414adf14 | 432 | struct nfs4_state_owner *sp; |
1da177e4 | 433 | |
9f958ab8 TM |
434 | while (*p != NULL) { |
435 | parent = *p; | |
24d292b8 | 436 | sp = rb_entry(parent, struct nfs4_state_owner, so_server_node); |
9f958ab8 TM |
437 | |
438 | if (cred < sp->so_cred) | |
439 | p = &parent->rb_left; | |
440 | else if (cred > sp->so_cred) | |
441 | p = &parent->rb_right; | |
442 | else { | |
0aaaf5c4 CL |
443 | if (!list_empty(&sp->so_lru)) |
444 | list_del_init(&sp->so_lru); | |
9f958ab8 | 445 | atomic_inc(&sp->so_count); |
414adf14 | 446 | return sp; |
9f958ab8 | 447 | } |
1da177e4 | 448 | } |
414adf14 | 449 | return NULL; |
1da177e4 LT |
450 | } |
451 | ||
9f958ab8 | 452 | static struct nfs4_state_owner * |
24d292b8 | 453 | nfs4_insert_state_owner_locked(struct nfs4_state_owner *new) |
9f958ab8 | 454 | { |
24d292b8 CL |
455 | struct nfs_server *server = new->so_server; |
456 | struct rb_node **p = &server->state_owners.rb_node, | |
9f958ab8 TM |
457 | *parent = NULL; |
458 | struct nfs4_state_owner *sp; | |
9157c31d | 459 | int err; |
9f958ab8 TM |
460 | |
461 | while (*p != NULL) { | |
462 | parent = *p; | |
24d292b8 | 463 | sp = rb_entry(parent, struct nfs4_state_owner, so_server_node); |
9f958ab8 TM |
464 | |
465 | if (new->so_cred < sp->so_cred) | |
466 | p = &parent->rb_left; | |
467 | else if (new->so_cred > sp->so_cred) | |
468 | p = &parent->rb_right; | |
469 | else { | |
0aaaf5c4 CL |
470 | if (!list_empty(&sp->so_lru)) |
471 | list_del_init(&sp->so_lru); | |
9f958ab8 TM |
472 | atomic_inc(&sp->so_count); |
473 | return sp; | |
474 | } | |
475 | } | |
48c22eb2 | 476 | err = ida_get_new(&server->openowner_id, &new->so_seqid.owner_id); |
9157c31d TM |
477 | if (err) |
478 | return ERR_PTR(err); | |
24d292b8 CL |
479 | rb_link_node(&new->so_server_node, parent, p); |
480 | rb_insert_color(&new->so_server_node, &server->state_owners); | |
9f958ab8 TM |
481 | return new; |
482 | } | |
483 | ||
484 | static void | |
24d292b8 | 485 | nfs4_remove_state_owner_locked(struct nfs4_state_owner *sp) |
9f958ab8 | 486 | { |
24d292b8 CL |
487 | struct nfs_server *server = sp->so_server; |
488 | ||
489 | if (!RB_EMPTY_NODE(&sp->so_server_node)) | |
490 | rb_erase(&sp->so_server_node, &server->state_owners); | |
48c22eb2 | 491 | ida_remove(&server->openowner_id, sp->so_seqid.owner_id); |
9f958ab8 TM |
492 | } |
493 | ||
7ba127ab TM |
494 | static void |
495 | nfs4_init_seqid_counter(struct nfs_seqid_counter *sc) | |
496 | { | |
95b72eb0 | 497 | sc->create_time = ktime_get(); |
7ba127ab TM |
498 | sc->flags = 0; |
499 | sc->counter = 0; | |
500 | spin_lock_init(&sc->lock); | |
501 | INIT_LIST_HEAD(&sc->list); | |
502 | rpc_init_wait_queue(&sc->wait, "Seqid_waitqueue"); | |
503 | } | |
504 | ||
505 | static void | |
506 | nfs4_destroy_seqid_counter(struct nfs_seqid_counter *sc) | |
507 | { | |
508 | rpc_destroy_wait_queue(&sc->wait); | |
509 | } | |
510 | ||
1da177e4 LT |
511 | /* |
512 | * nfs4_alloc_state_owner(): this is called on the OPEN or CREATE path to | |
513 | * create a new state_owner. | |
514 | * | |
515 | */ | |
516 | static struct nfs4_state_owner * | |
d1e284d5 TM |
517 | nfs4_alloc_state_owner(struct nfs_server *server, |
518 | struct rpc_cred *cred, | |
519 | gfp_t gfp_flags) | |
1da177e4 LT |
520 | { |
521 | struct nfs4_state_owner *sp; | |
522 | ||
d1e284d5 | 523 | sp = kzalloc(sizeof(*sp), gfp_flags); |
1da177e4 LT |
524 | if (!sp) |
525 | return NULL; | |
d1e284d5 TM |
526 | sp->so_server = server; |
527 | sp->so_cred = get_rpccred(cred); | |
ec073428 | 528 | spin_lock_init(&sp->so_lock); |
1da177e4 | 529 | INIT_LIST_HEAD(&sp->so_states); |
7ba127ab | 530 | nfs4_init_seqid_counter(&sp->so_seqid); |
1da177e4 | 531 | atomic_set(&sp->so_count, 1); |
0aaaf5c4 | 532 | INIT_LIST_HEAD(&sp->so_lru); |
1da177e4 LT |
533 | return sp; |
534 | } | |
535 | ||
1d2e88e7 | 536 | static void |
1da177e4 LT |
537 | nfs4_drop_state_owner(struct nfs4_state_owner *sp) |
538 | { | |
c77365c9 TM |
539 | struct rb_node *rb_node = &sp->so_server_node; |
540 | ||
541 | if (!RB_EMPTY_NODE(rb_node)) { | |
24d292b8 CL |
542 | struct nfs_server *server = sp->so_server; |
543 | struct nfs_client *clp = server->nfs_client; | |
9f958ab8 TM |
544 | |
545 | spin_lock(&clp->cl_lock); | |
c77365c9 TM |
546 | if (!RB_EMPTY_NODE(rb_node)) { |
547 | rb_erase(rb_node, &server->state_owners); | |
548 | RB_CLEAR_NODE(rb_node); | |
549 | } | |
9f958ab8 TM |
550 | spin_unlock(&clp->cl_lock); |
551 | } | |
1da177e4 LT |
552 | } |
553 | ||
0aaaf5c4 CL |
554 | static void nfs4_free_state_owner(struct nfs4_state_owner *sp) |
555 | { | |
7ba127ab | 556 | nfs4_destroy_seqid_counter(&sp->so_seqid); |
0aaaf5c4 CL |
557 | put_rpccred(sp->so_cred); |
558 | kfree(sp); | |
559 | } | |
560 | ||
561 | static void nfs4_gc_state_owners(struct nfs_server *server) | |
562 | { | |
563 | struct nfs_client *clp = server->nfs_client; | |
564 | struct nfs4_state_owner *sp, *tmp; | |
565 | unsigned long time_min, time_max; | |
566 | LIST_HEAD(doomed); | |
567 | ||
568 | spin_lock(&clp->cl_lock); | |
569 | time_max = jiffies; | |
570 | time_min = (long)time_max - (long)clp->cl_lease_time; | |
571 | list_for_each_entry_safe(sp, tmp, &server->state_owners_lru, so_lru) { | |
572 | /* NB: LRU is sorted so that oldest is at the head */ | |
573 | if (time_in_range(sp->so_expires, time_min, time_max)) | |
574 | break; | |
575 | list_move(&sp->so_lru, &doomed); | |
576 | nfs4_remove_state_owner_locked(sp); | |
577 | } | |
578 | spin_unlock(&clp->cl_lock); | |
579 | ||
580 | list_for_each_entry_safe(sp, tmp, &doomed, so_lru) { | |
581 | list_del(&sp->so_lru); | |
582 | nfs4_free_state_owner(sp); | |
583 | } | |
584 | } | |
585 | ||
24d292b8 CL |
586 | /** |
587 | * nfs4_get_state_owner - Look up a state owner given a credential | |
588 | * @server: nfs_server to search | |
589 | * @cred: RPC credential to match | |
590 | * | |
591 | * Returns a pointer to an instantiated nfs4_state_owner struct, or NULL. | |
592 | */ | |
593 | struct nfs4_state_owner *nfs4_get_state_owner(struct nfs_server *server, | |
d1e284d5 TM |
594 | struct rpc_cred *cred, |
595 | gfp_t gfp_flags) | |
1da177e4 | 596 | { |
7539bbab | 597 | struct nfs_client *clp = server->nfs_client; |
1da177e4 LT |
598 | struct nfs4_state_owner *sp, *new; |
599 | ||
1da177e4 | 600 | spin_lock(&clp->cl_lock); |
24d292b8 | 601 | sp = nfs4_find_state_owner_locked(server, cred); |
1da177e4 | 602 | spin_unlock(&clp->cl_lock); |
1da177e4 | 603 | if (sp != NULL) |
0aaaf5c4 | 604 | goto out; |
d1e284d5 | 605 | new = nfs4_alloc_state_owner(server, cred, gfp_flags); |
9f958ab8 | 606 | if (new == NULL) |
0aaaf5c4 | 607 | goto out; |
9157c31d TM |
608 | do { |
609 | if (ida_pre_get(&server->openowner_id, gfp_flags) == 0) | |
610 | break; | |
611 | spin_lock(&clp->cl_lock); | |
612 | sp = nfs4_insert_state_owner_locked(new); | |
613 | spin_unlock(&clp->cl_lock); | |
614 | } while (sp == ERR_PTR(-EAGAIN)); | |
d1e284d5 TM |
615 | if (sp != new) |
616 | nfs4_free_state_owner(new); | |
0aaaf5c4 CL |
617 | out: |
618 | nfs4_gc_state_owners(server); | |
9f958ab8 | 619 | return sp; |
1da177e4 LT |
620 | } |
621 | ||
24d292b8 CL |
622 | /** |
623 | * nfs4_put_state_owner - Release a nfs4_state_owner | |
624 | * @sp: state owner data to release | |
7bf97bc2 TM |
625 | * |
626 | * Note that we keep released state owners on an LRU | |
627 | * list. | |
628 | * This caches valid state owners so that they can be | |
629 | * reused, to avoid the OPEN_CONFIRM on minor version 0. | |
630 | * It also pins the uniquifier of dropped state owners for | |
631 | * a while, to ensure that those state owner names are | |
632 | * never reused. | |
24d292b8 | 633 | */ |
1da177e4 LT |
634 | void nfs4_put_state_owner(struct nfs4_state_owner *sp) |
635 | { | |
0aaaf5c4 CL |
636 | struct nfs_server *server = sp->so_server; |
637 | struct nfs_client *clp = server->nfs_client; | |
1da177e4 LT |
638 | |
639 | if (!atomic_dec_and_lock(&sp->so_count, &clp->cl_lock)) | |
640 | return; | |
0aaaf5c4 | 641 | |
7bf97bc2 TM |
642 | sp->so_expires = jiffies; |
643 | list_add_tail(&sp->so_lru, &server->state_owners_lru); | |
644 | spin_unlock(&clp->cl_lock); | |
0aaaf5c4 CL |
645 | } |
646 | ||
647 | /** | |
648 | * nfs4_purge_state_owners - Release all cached state owners | |
649 | * @server: nfs_server with cached state owners to release | |
650 | * | |
651 | * Called at umount time. Remaining state owners will be on | |
652 | * the LRU with ref count of zero. | |
653 | */ | |
654 | void nfs4_purge_state_owners(struct nfs_server *server) | |
655 | { | |
656 | struct nfs_client *clp = server->nfs_client; | |
657 | struct nfs4_state_owner *sp, *tmp; | |
658 | LIST_HEAD(doomed); | |
659 | ||
660 | spin_lock(&clp->cl_lock); | |
661 | list_for_each_entry_safe(sp, tmp, &server->state_owners_lru, so_lru) { | |
662 | list_move(&sp->so_lru, &doomed); | |
663 | nfs4_remove_state_owner_locked(sp); | |
664 | } | |
1da177e4 | 665 | spin_unlock(&clp->cl_lock); |
0aaaf5c4 CL |
666 | |
667 | list_for_each_entry_safe(sp, tmp, &doomed, so_lru) { | |
668 | list_del(&sp->so_lru); | |
669 | nfs4_free_state_owner(sp); | |
670 | } | |
1da177e4 LT |
671 | } |
672 | ||
673 | static struct nfs4_state * | |
674 | nfs4_alloc_open_state(void) | |
675 | { | |
676 | struct nfs4_state *state; | |
677 | ||
8535b2be | 678 | state = kzalloc(sizeof(*state), GFP_NOFS); |
1da177e4 LT |
679 | if (!state) |
680 | return NULL; | |
1da177e4 LT |
681 | atomic_set(&state->count, 1); |
682 | INIT_LIST_HEAD(&state->lock_states); | |
8d0a8a9d | 683 | spin_lock_init(&state->state_lock); |
8bda4e4c | 684 | seqlock_init(&state->seqlock); |
1da177e4 LT |
685 | return state; |
686 | } | |
687 | ||
4cecb76f | 688 | void |
dc0b027d | 689 | nfs4_state_set_mode_locked(struct nfs4_state *state, fmode_t fmode) |
4cecb76f | 690 | { |
dc0b027d | 691 | if (state->state == fmode) |
4cecb76f TM |
692 | return; |
693 | /* NB! List reordering - see the reclaim code for why. */ | |
dc0b027d TM |
694 | if ((fmode & FMODE_WRITE) != (state->state & FMODE_WRITE)) { |
695 | if (fmode & FMODE_WRITE) | |
4cecb76f TM |
696 | list_move(&state->open_states, &state->owner->so_states); |
697 | else | |
698 | list_move_tail(&state->open_states, &state->owner->so_states); | |
699 | } | |
dc0b027d | 700 | state->state = fmode; |
4cecb76f TM |
701 | } |
702 | ||
1da177e4 LT |
703 | static struct nfs4_state * |
704 | __nfs4_find_state_byowner(struct inode *inode, struct nfs4_state_owner *owner) | |
705 | { | |
706 | struct nfs_inode *nfsi = NFS_I(inode); | |
707 | struct nfs4_state *state; | |
708 | ||
709 | list_for_each_entry(state, &nfsi->open_states, inode_states) { | |
1c816efa | 710 | if (state->owner != owner) |
1da177e4 | 711 | continue; |
1c816efa | 712 | if (atomic_inc_not_zero(&state->count)) |
1da177e4 | 713 | return state; |
1da177e4 LT |
714 | } |
715 | return NULL; | |
716 | } | |
717 | ||
1da177e4 LT |
718 | static void |
719 | nfs4_free_open_state(struct nfs4_state *state) | |
720 | { | |
721 | kfree(state); | |
722 | } | |
723 | ||
724 | struct nfs4_state * | |
725 | nfs4_get_open_state(struct inode *inode, struct nfs4_state_owner *owner) | |
726 | { | |
727 | struct nfs4_state *state, *new; | |
728 | struct nfs_inode *nfsi = NFS_I(inode); | |
729 | ||
730 | spin_lock(&inode->i_lock); | |
731 | state = __nfs4_find_state_byowner(inode, owner); | |
732 | spin_unlock(&inode->i_lock); | |
733 | if (state) | |
734 | goto out; | |
735 | new = nfs4_alloc_open_state(); | |
ec073428 | 736 | spin_lock(&owner->so_lock); |
1da177e4 LT |
737 | spin_lock(&inode->i_lock); |
738 | state = __nfs4_find_state_byowner(inode, owner); | |
739 | if (state == NULL && new != NULL) { | |
740 | state = new; | |
1da177e4 LT |
741 | state->owner = owner; |
742 | atomic_inc(&owner->so_count); | |
743 | list_add(&state->inode_states, &nfsi->open_states); | |
0444d76a DC |
744 | ihold(inode); |
745 | state->inode = inode; | |
1da177e4 | 746 | spin_unlock(&inode->i_lock); |
ec073428 TM |
747 | /* Note: The reclaim code dictates that we add stateless |
748 | * and read-only stateids to the end of the list */ | |
749 | list_add_tail(&state->open_states, &owner->so_states); | |
750 | spin_unlock(&owner->so_lock); | |
1da177e4 LT |
751 | } else { |
752 | spin_unlock(&inode->i_lock); | |
ec073428 | 753 | spin_unlock(&owner->so_lock); |
1da177e4 LT |
754 | if (new) |
755 | nfs4_free_open_state(new); | |
756 | } | |
757 | out: | |
758 | return state; | |
759 | } | |
760 | ||
1da177e4 LT |
761 | void nfs4_put_open_state(struct nfs4_state *state) |
762 | { | |
763 | struct inode *inode = state->inode; | |
764 | struct nfs4_state_owner *owner = state->owner; | |
765 | ||
ec073428 | 766 | if (!atomic_dec_and_lock(&state->count, &owner->so_lock)) |
1da177e4 | 767 | return; |
ec073428 | 768 | spin_lock(&inode->i_lock); |
ba683031 | 769 | list_del(&state->inode_states); |
1da177e4 | 770 | list_del(&state->open_states); |
ec073428 TM |
771 | spin_unlock(&inode->i_lock); |
772 | spin_unlock(&owner->so_lock); | |
1da177e4 | 773 | iput(inode); |
1da177e4 LT |
774 | nfs4_free_open_state(state); |
775 | nfs4_put_state_owner(owner); | |
776 | } | |
777 | ||
778 | /* | |
83c9d41e | 779 | * Close the current file. |
1da177e4 | 780 | */ |
643168c2 | 781 | static void __nfs4_close(struct nfs4_state *state, |
8535b2be | 782 | fmode_t fmode, gfp_t gfp_mask, int wait) |
1da177e4 | 783 | { |
1da177e4 | 784 | struct nfs4_state_owner *owner = state->owner; |
003707c7 | 785 | int call_close = 0; |
dc0b027d | 786 | fmode_t newstate; |
1da177e4 LT |
787 | |
788 | atomic_inc(&owner->so_count); | |
1da177e4 | 789 | /* Protect against nfs4_find_state() */ |
ec073428 | 790 | spin_lock(&owner->so_lock); |
dc0b027d | 791 | switch (fmode & (FMODE_READ | FMODE_WRITE)) { |
e7616923 TM |
792 | case FMODE_READ: |
793 | state->n_rdonly--; | |
794 | break; | |
795 | case FMODE_WRITE: | |
796 | state->n_wronly--; | |
797 | break; | |
798 | case FMODE_READ|FMODE_WRITE: | |
799 | state->n_rdwr--; | |
800 | } | |
003707c7 | 801 | newstate = FMODE_READ|FMODE_WRITE; |
e7616923 | 802 | if (state->n_rdwr == 0) { |
003707c7 | 803 | if (state->n_rdonly == 0) { |
e7616923 | 804 | newstate &= ~FMODE_READ; |
003707c7 TM |
805 | call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags); |
806 | call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); | |
807 | } | |
808 | if (state->n_wronly == 0) { | |
e7616923 | 809 | newstate &= ~FMODE_WRITE; |
003707c7 TM |
810 | call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags); |
811 | call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); | |
812 | } | |
813 | if (newstate == 0) | |
814 | clear_bit(NFS_DELEGATED_STATE, &state->flags); | |
e7616923 | 815 | } |
003707c7 | 816 | nfs4_state_set_mode_locked(state, newstate); |
ec073428 | 817 | spin_unlock(&owner->so_lock); |
4cecb76f | 818 | |
003707c7 | 819 | if (!call_close) { |
b39e625b TM |
820 | nfs4_put_open_state(state); |
821 | nfs4_put_state_owner(owner); | |
1f7977c1 TM |
822 | } else |
823 | nfs4_do_close(state, gfp_mask, wait); | |
a49c3c77 TM |
824 | } |
825 | ||
643168c2 | 826 | void nfs4_close_state(struct nfs4_state *state, fmode_t fmode) |
a49c3c77 | 827 | { |
643168c2 | 828 | __nfs4_close(state, fmode, GFP_NOFS, 0); |
a49c3c77 TM |
829 | } |
830 | ||
643168c2 | 831 | void nfs4_close_sync(struct nfs4_state *state, fmode_t fmode) |
a49c3c77 | 832 | { |
643168c2 | 833 | __nfs4_close(state, fmode, GFP_KERNEL, 1); |
1da177e4 LT |
834 | } |
835 | ||
836 | /* | |
837 | * Search the state->lock_states for an existing lock_owner | |
838 | * that is compatible with current->files | |
839 | */ | |
840 | static struct nfs4_lock_state * | |
77041ed9 | 841 | __nfs4_find_lock_state(struct nfs4_state *state, fl_owner_t fl_owner, pid_t fl_pid, unsigned int type) |
1da177e4 LT |
842 | { |
843 | struct nfs4_lock_state *pos; | |
844 | list_for_each_entry(pos, &state->lock_states, ls_locks) { | |
77041ed9 | 845 | if (type != NFS4_ANY_LOCK_TYPE && pos->ls_owner.lo_type != type) |
1da177e4 | 846 | continue; |
77041ed9 TM |
847 | switch (pos->ls_owner.lo_type) { |
848 | case NFS4_POSIX_LOCK_TYPE: | |
849 | if (pos->ls_owner.lo_u.posix_owner != fl_owner) | |
850 | continue; | |
851 | break; | |
852 | case NFS4_FLOCK_LOCK_TYPE: | |
853 | if (pos->ls_owner.lo_u.flock_owner != fl_pid) | |
854 | continue; | |
855 | } | |
1da177e4 LT |
856 | atomic_inc(&pos->ls_count); |
857 | return pos; | |
858 | } | |
859 | return NULL; | |
860 | } | |
861 | ||
1da177e4 LT |
862 | /* |
863 | * Return a compatible lock_state. If no initialized lock_state structure | |
864 | * exists, return an uninitialized one. | |
865 | * | |
1da177e4 | 866 | */ |
77041ed9 | 867 | 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 |
868 | { |
869 | struct nfs4_lock_state *lsp; | |
24d292b8 | 870 | struct nfs_server *server = state->owner->so_server; |
1da177e4 | 871 | |
8535b2be | 872 | lsp = kzalloc(sizeof(*lsp), GFP_NOFS); |
1da177e4 LT |
873 | if (lsp == NULL) |
874 | return NULL; | |
7ba127ab | 875 | nfs4_init_seqid_counter(&lsp->ls_seqid); |
1da177e4 | 876 | atomic_set(&lsp->ls_count, 1); |
b64aec8d | 877 | lsp->ls_state = state; |
77041ed9 TM |
878 | lsp->ls_owner.lo_type = type; |
879 | switch (lsp->ls_owner.lo_type) { | |
880 | case NFS4_FLOCK_LOCK_TYPE: | |
881 | lsp->ls_owner.lo_u.flock_owner = fl_pid; | |
882 | break; | |
883 | case NFS4_POSIX_LOCK_TYPE: | |
884 | lsp->ls_owner.lo_u.posix_owner = fl_owner; | |
885 | break; | |
886 | default: | |
d2d7ce28 | 887 | goto out_free; |
77041ed9 | 888 | } |
48c22eb2 TM |
889 | lsp->ls_seqid.owner_id = ida_simple_get(&server->lockowner_id, 0, 0, GFP_NOFS); |
890 | if (lsp->ls_seqid.owner_id < 0) | |
d2d7ce28 | 891 | goto out_free; |
8d0a8a9d | 892 | INIT_LIST_HEAD(&lsp->ls_locks); |
1da177e4 | 893 | return lsp; |
d2d7ce28 TM |
894 | out_free: |
895 | kfree(lsp); | |
896 | return NULL; | |
1da177e4 LT |
897 | } |
898 | ||
5ae67c4f | 899 | void nfs4_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp) |
9f958ab8 | 900 | { |
48c22eb2 | 901 | ida_simple_remove(&server->lockowner_id, lsp->ls_seqid.owner_id); |
7ba127ab | 902 | nfs4_destroy_seqid_counter(&lsp->ls_seqid); |
9f958ab8 TM |
903 | kfree(lsp); |
904 | } | |
905 | ||
1da177e4 LT |
906 | /* |
907 | * Return a compatible lock_state. If no initialized lock_state structure | |
908 | * exists, return an uninitialized one. | |
909 | * | |
1da177e4 | 910 | */ |
77041ed9 | 911 | static struct nfs4_lock_state *nfs4_get_lock_state(struct nfs4_state *state, fl_owner_t owner, pid_t pid, unsigned int type) |
1da177e4 | 912 | { |
8d0a8a9d | 913 | struct nfs4_lock_state *lsp, *new = NULL; |
1da177e4 | 914 | |
8d0a8a9d TM |
915 | for(;;) { |
916 | spin_lock(&state->state_lock); | |
77041ed9 | 917 | lsp = __nfs4_find_lock_state(state, owner, pid, type); |
8d0a8a9d TM |
918 | if (lsp != NULL) |
919 | break; | |
920 | if (new != NULL) { | |
8d0a8a9d TM |
921 | list_add(&new->ls_locks, &state->lock_states); |
922 | set_bit(LK_STATE_IN_USE, &state->flags); | |
923 | lsp = new; | |
924 | new = NULL; | |
925 | break; | |
926 | } | |
927 | spin_unlock(&state->state_lock); | |
77041ed9 | 928 | new = nfs4_alloc_lock_state(state, owner, pid, type); |
8d0a8a9d TM |
929 | if (new == NULL) |
930 | return NULL; | |
931 | } | |
932 | spin_unlock(&state->state_lock); | |
9f958ab8 | 933 | if (new != NULL) |
5ae67c4f | 934 | nfs4_free_lock_state(state->owner->so_server, new); |
1da177e4 LT |
935 | return lsp; |
936 | } | |
937 | ||
938 | /* | |
8d0a8a9d TM |
939 | * Release reference to lock_state, and free it if we see that |
940 | * it is no longer in use | |
1da177e4 | 941 | */ |
faf5f49c | 942 | void nfs4_put_lock_state(struct nfs4_lock_state *lsp) |
1da177e4 | 943 | { |
8d0a8a9d | 944 | struct nfs4_state *state; |
1da177e4 | 945 | |
8d0a8a9d TM |
946 | if (lsp == NULL) |
947 | return; | |
948 | state = lsp->ls_state; | |
949 | if (!atomic_dec_and_lock(&lsp->ls_count, &state->state_lock)) | |
950 | return; | |
951 | list_del(&lsp->ls_locks); | |
952 | if (list_empty(&state->lock_states)) | |
953 | clear_bit(LK_STATE_IN_USE, &state->flags); | |
954 | spin_unlock(&state->state_lock); | |
795a88c9 | 955 | if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) { |
cf470c3e TM |
956 | if (nfs4_release_lockowner(lsp) == 0) |
957 | return; | |
958 | } | |
5ae67c4f | 959 | nfs4_free_lock_state(lsp->ls_state->owner->so_server, lsp); |
1da177e4 LT |
960 | } |
961 | ||
8d0a8a9d | 962 | static void nfs4_fl_copy_lock(struct file_lock *dst, struct file_lock *src) |
1da177e4 | 963 | { |
8d0a8a9d | 964 | struct nfs4_lock_state *lsp = src->fl_u.nfs4_fl.owner; |
1da177e4 | 965 | |
8d0a8a9d TM |
966 | dst->fl_u.nfs4_fl.owner = lsp; |
967 | atomic_inc(&lsp->ls_count); | |
968 | } | |
1da177e4 | 969 | |
8d0a8a9d | 970 | static void nfs4_fl_release_lock(struct file_lock *fl) |
1da177e4 | 971 | { |
8d0a8a9d | 972 | nfs4_put_lock_state(fl->fl_u.nfs4_fl.owner); |
1da177e4 LT |
973 | } |
974 | ||
6aed6285 | 975 | static const struct file_lock_operations nfs4_fl_lock_ops = { |
8d0a8a9d TM |
976 | .fl_copy_lock = nfs4_fl_copy_lock, |
977 | .fl_release_private = nfs4_fl_release_lock, | |
978 | }; | |
979 | ||
980 | int nfs4_set_lock_state(struct nfs4_state *state, struct file_lock *fl) | |
1da177e4 | 981 | { |
8d0a8a9d TM |
982 | struct nfs4_lock_state *lsp; |
983 | ||
984 | if (fl->fl_ops != NULL) | |
985 | return 0; | |
77041ed9 TM |
986 | if (fl->fl_flags & FL_POSIX) |
987 | lsp = nfs4_get_lock_state(state, fl->fl_owner, 0, NFS4_POSIX_LOCK_TYPE); | |
988 | else if (fl->fl_flags & FL_FLOCK) | |
17280175 TM |
989 | lsp = nfs4_get_lock_state(state, NULL, fl->fl_pid, |
990 | NFS4_FLOCK_LOCK_TYPE); | |
77041ed9 TM |
991 | else |
992 | return -EINVAL; | |
8d0a8a9d TM |
993 | if (lsp == NULL) |
994 | return -ENOMEM; | |
995 | fl->fl_u.nfs4_fl.owner = lsp; | |
996 | fl->fl_ops = &nfs4_fl_lock_ops; | |
997 | return 0; | |
1da177e4 LT |
998 | } |
999 | ||
4fc8796d | 1000 | static bool nfs4_copy_lock_stateid(nfs4_stateid *dst, struct nfs4_state *state, |
2a369153 | 1001 | const struct nfs_lockowner *lockowner) |
1da177e4 | 1002 | { |
8d0a8a9d | 1003 | struct nfs4_lock_state *lsp; |
2a369153 TM |
1004 | fl_owner_t fl_owner; |
1005 | pid_t fl_pid; | |
4fc8796d | 1006 | bool ret = false; |
1da177e4 | 1007 | |
2a369153 TM |
1008 | |
1009 | if (lockowner == NULL) | |
1010 | goto out; | |
1011 | ||
8d0a8a9d | 1012 | if (test_bit(LK_STATE_IN_USE, &state->flags) == 0) |
4fc8796d | 1013 | goto out; |
1da177e4 | 1014 | |
2a369153 TM |
1015 | fl_owner = lockowner->l_owner; |
1016 | fl_pid = lockowner->l_pid; | |
8d0a8a9d | 1017 | spin_lock(&state->state_lock); |
77041ed9 | 1018 | lsp = __nfs4_find_lock_state(state, fl_owner, fl_pid, NFS4_ANY_LOCK_TYPE); |
795a88c9 | 1019 | if (lsp != NULL && test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0) { |
f597c537 | 1020 | nfs4_stateid_copy(dst, &lsp->ls_stateid); |
4fc8796d TM |
1021 | ret = true; |
1022 | } | |
8d0a8a9d | 1023 | spin_unlock(&state->state_lock); |
1da177e4 | 1024 | nfs4_put_lock_state(lsp); |
4fc8796d TM |
1025 | out: |
1026 | return ret; | |
1027 | } | |
1028 | ||
1029 | static void nfs4_copy_open_stateid(nfs4_stateid *dst, struct nfs4_state *state) | |
1030 | { | |
1031 | int seq; | |
1032 | ||
1033 | do { | |
1034 | seq = read_seqbegin(&state->seqlock); | |
1035 | nfs4_stateid_copy(dst, &state->stateid); | |
1036 | } while (read_seqretry(&state->seqlock, seq)); | |
1037 | } | |
1038 | ||
1039 | /* | |
1040 | * Byte-range lock aware utility to initialize the stateid of read/write | |
1041 | * requests. | |
1042 | */ | |
1043 | void nfs4_select_rw_stateid(nfs4_stateid *dst, struct nfs4_state *state, | |
2a369153 | 1044 | fmode_t fmode, const struct nfs_lockowner *lockowner) |
4fc8796d TM |
1045 | { |
1046 | if (nfs4_copy_delegation_stateid(dst, state->inode, fmode)) | |
1047 | return; | |
2a369153 | 1048 | if (nfs4_copy_lock_stateid(dst, state, lockowner)) |
4fc8796d TM |
1049 | return; |
1050 | nfs4_copy_open_stateid(dst, state); | |
1da177e4 LT |
1051 | } |
1052 | ||
8535b2be | 1053 | struct nfs_seqid *nfs_alloc_seqid(struct nfs_seqid_counter *counter, gfp_t gfp_mask) |
cee54fc9 | 1054 | { |
cee54fc9 TM |
1055 | struct nfs_seqid *new; |
1056 | ||
8535b2be | 1057 | new = kmalloc(sizeof(*new), gfp_mask); |
cee54fc9 TM |
1058 | if (new != NULL) { |
1059 | new->sequence = counter; | |
2f74c0a0 | 1060 | INIT_LIST_HEAD(&new->list); |
4601df20 | 1061 | new->task = NULL; |
cee54fc9 TM |
1062 | } |
1063 | return new; | |
1064 | } | |
1065 | ||
72211dbe | 1066 | void nfs_release_seqid(struct nfs_seqid *seqid) |
1da177e4 | 1067 | { |
4601df20 | 1068 | struct nfs_seqid_counter *sequence; |
cee54fc9 | 1069 | |
4601df20 TM |
1070 | if (list_empty(&seqid->list)) |
1071 | return; | |
1072 | sequence = seqid->sequence; | |
1073 | spin_lock(&sequence->lock); | |
1074 | list_del_init(&seqid->list); | |
1075 | if (!list_empty(&sequence->list)) { | |
1076 | struct nfs_seqid *next; | |
1077 | ||
1078 | next = list_first_entry(&sequence->list, | |
1079 | struct nfs_seqid, list); | |
1080 | rpc_wake_up_queued_task(&sequence->wait, next->task); | |
2f74c0a0 | 1081 | } |
4601df20 | 1082 | spin_unlock(&sequence->lock); |
72211dbe TM |
1083 | } |
1084 | ||
1085 | void nfs_free_seqid(struct nfs_seqid *seqid) | |
1086 | { | |
1087 | nfs_release_seqid(seqid); | |
cee54fc9 | 1088 | kfree(seqid); |
1da177e4 LT |
1089 | } |
1090 | ||
1091 | /* | |
cee54fc9 TM |
1092 | * Increment the seqid if the OPEN/OPEN_DOWNGRADE/CLOSE succeeded, or |
1093 | * failed with a seqid incrementing error - | |
1094 | * see comments nfs_fs.h:seqid_mutating_error() | |
1095 | */ | |
88d90939 | 1096 | static void nfs_increment_seqid(int status, struct nfs_seqid *seqid) |
cee54fc9 TM |
1097 | { |
1098 | switch (status) { | |
1099 | case 0: | |
1100 | break; | |
1101 | case -NFS4ERR_BAD_SEQID: | |
6f43ddcc TM |
1102 | if (seqid->sequence->flags & NFS_SEQID_CONFIRMED) |
1103 | return; | |
9a3ba432 | 1104 | pr_warn_ratelimited("NFS: v4 server returned a bad" |
497799e7 DM |
1105 | " sequence-id error on an" |
1106 | " unconfirmed sequence %p!\n", | |
6f43ddcc | 1107 | seqid->sequence); |
cee54fc9 TM |
1108 | case -NFS4ERR_STALE_CLIENTID: |
1109 | case -NFS4ERR_STALE_STATEID: | |
1110 | case -NFS4ERR_BAD_STATEID: | |
1111 | case -NFS4ERR_BADXDR: | |
1112 | case -NFS4ERR_RESOURCE: | |
1113 | case -NFS4ERR_NOFILEHANDLE: | |
1114 | /* Non-seqid mutating errors */ | |
1115 | return; | |
1116 | }; | |
1117 | /* | |
1118 | * Note: no locking needed as we are guaranteed to be first | |
1119 | * on the sequence list | |
1120 | */ | |
1121 | seqid->sequence->counter++; | |
1122 | } | |
1123 | ||
1124 | void nfs_increment_open_seqid(int status, struct nfs_seqid *seqid) | |
1125 | { | |
34dc1ad7 BH |
1126 | struct nfs4_state_owner *sp = container_of(seqid->sequence, |
1127 | struct nfs4_state_owner, so_seqid); | |
1128 | struct nfs_server *server = sp->so_server; | |
1129 | ||
1130 | if (status == -NFS4ERR_BAD_SEQID) | |
1da177e4 | 1131 | nfs4_drop_state_owner(sp); |
34dc1ad7 BH |
1132 | if (!nfs4_has_session(server->nfs_client)) |
1133 | nfs_increment_seqid(status, seqid); | |
cee54fc9 TM |
1134 | } |
1135 | ||
1136 | /* | |
cee54fc9 TM |
1137 | * Increment the seqid if the LOCK/LOCKU succeeded, or |
1138 | * failed with a seqid incrementing error - | |
1139 | * see comments nfs_fs.h:seqid_mutating_error() | |
1140 | */ | |
1141 | void nfs_increment_lock_seqid(int status, struct nfs_seqid *seqid) | |
1142 | { | |
88d90939 | 1143 | nfs_increment_seqid(status, seqid); |
cee54fc9 TM |
1144 | } |
1145 | ||
1146 | int nfs_wait_on_sequence(struct nfs_seqid *seqid, struct rpc_task *task) | |
1147 | { | |
7ba127ab | 1148 | struct nfs_seqid_counter *sequence = seqid->sequence; |
cee54fc9 TM |
1149 | int status = 0; |
1150 | ||
1151 | spin_lock(&sequence->lock); | |
4601df20 | 1152 | seqid->task = task; |
2f74c0a0 TM |
1153 | if (list_empty(&seqid->list)) |
1154 | list_add_tail(&seqid->list, &sequence->list); | |
1155 | if (list_first_entry(&sequence->list, struct nfs_seqid, list) == seqid) | |
1156 | goto unlock; | |
5d00837b | 1157 | rpc_sleep_on(&sequence->wait, task, NULL); |
2f74c0a0 TM |
1158 | status = -EAGAIN; |
1159 | unlock: | |
cee54fc9 TM |
1160 | spin_unlock(&sequence->lock); |
1161 | return status; | |
1da177e4 LT |
1162 | } |
1163 | ||
e005e804 | 1164 | static int nfs4_run_state_manager(void *); |
1da177e4 | 1165 | |
e005e804 | 1166 | static void nfs4_clear_state_manager_bit(struct nfs_client *clp) |
433fbe4c TM |
1167 | { |
1168 | smp_mb__before_clear_bit(); | |
e005e804 | 1169 | clear_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state); |
433fbe4c | 1170 | smp_mb__after_clear_bit(); |
e005e804 | 1171 | wake_up_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING); |
433fbe4c TM |
1172 | rpc_wake_up(&clp->cl_rpcwaitq); |
1173 | } | |
1174 | ||
1da177e4 | 1175 | /* |
e005e804 | 1176 | * Schedule the nfs_client asynchronous state management routine |
1da177e4 | 1177 | */ |
b0d3ded1 | 1178 | void nfs4_schedule_state_manager(struct nfs_client *clp) |
1da177e4 | 1179 | { |
5043e900 | 1180 | struct task_struct *task; |
2446ab60 | 1181 | char buf[INET6_ADDRSTRLEN + sizeof("-manager") + 1]; |
1da177e4 | 1182 | |
e005e804 TM |
1183 | if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) != 0) |
1184 | return; | |
5043e900 TM |
1185 | __module_get(THIS_MODULE); |
1186 | atomic_inc(&clp->cl_count); | |
2446ab60 TM |
1187 | |
1188 | /* The rcu_read_lock() is not strictly necessary, as the state | |
1189 | * manager is the only thread that ever changes the rpc_xprt | |
1190 | * after it's initialized. At this point, we're single threaded. */ | |
1191 | rcu_read_lock(); | |
1192 | snprintf(buf, sizeof(buf), "%s-manager", | |
1193 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)); | |
1194 | rcu_read_unlock(); | |
1195 | task = kthread_run(nfs4_run_state_manager, clp, buf); | |
1196 | if (IS_ERR(task)) { | |
1197 | printk(KERN_ERR "%s: kthread_run: %ld\n", | |
1198 | __func__, PTR_ERR(task)); | |
1199 | nfs4_clear_state_manager_bit(clp); | |
1200 | nfs_put_client(clp); | |
1201 | module_put(THIS_MODULE); | |
1202 | } | |
1da177e4 LT |
1203 | } |
1204 | ||
1205 | /* | |
0400a6b0 | 1206 | * Schedule a lease recovery attempt |
1da177e4 | 1207 | */ |
0400a6b0 | 1208 | void nfs4_schedule_lease_recovery(struct nfs_client *clp) |
1da177e4 LT |
1209 | { |
1210 | if (!clp) | |
1211 | return; | |
e598d843 TM |
1212 | if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
1213 | set_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); | |
cc0a9843 TM |
1214 | dprintk("%s: scheduling lease recovery for server %s\n", __func__, |
1215 | clp->cl_hostname); | |
e005e804 | 1216 | nfs4_schedule_state_manager(clp); |
1da177e4 | 1217 | } |
9cb81968 | 1218 | EXPORT_SYMBOL_GPL(nfs4_schedule_lease_recovery); |
1da177e4 | 1219 | |
33021279 TM |
1220 | int nfs4_wait_clnt_recover(struct nfs_client *clp) |
1221 | { | |
1222 | int res; | |
1223 | ||
1224 | might_sleep(); | |
1225 | ||
1226 | res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING, | |
1227 | nfs_wait_bit_killable, TASK_KILLABLE); | |
1228 | if (res) | |
1229 | return res; | |
1230 | ||
1231 | if (clp->cl_cons_state < 0) | |
1232 | return clp->cl_cons_state; | |
1233 | return 0; | |
1234 | } | |
1235 | ||
1236 | int nfs4_client_recover_expired_lease(struct nfs_client *clp) | |
1237 | { | |
1238 | unsigned int loop; | |
1239 | int ret; | |
1240 | ||
1241 | for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) { | |
1242 | ret = nfs4_wait_clnt_recover(clp); | |
1243 | if (ret != 0) | |
1244 | break; | |
1245 | if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) && | |
1246 | !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state)) | |
1247 | break; | |
1248 | nfs4_schedule_state_manager(clp); | |
1249 | ret = -EIO; | |
1250 | } | |
1251 | return ret; | |
1252 | } | |
1253 | ||
ad1e3968 TM |
1254 | /* |
1255 | * nfs40_handle_cb_pathdown - return all delegations after NFS4ERR_CB_PATH_DOWN | |
1256 | * @clp: client to process | |
1257 | * | |
1258 | * Set the NFS4CLNT_LEASE_EXPIRED state in order to force a | |
1259 | * resend of the SETCLIENTID and hence re-establish the | |
1260 | * callback channel. Then return all existing delegations. | |
1261 | */ | |
1262 | static void nfs40_handle_cb_pathdown(struct nfs_client *clp) | |
1263 | { | |
1264 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1265 | nfs_expire_all_delegations(clp); | |
cc0a9843 TM |
1266 | dprintk("%s: handling CB_PATHDOWN recovery for server %s\n", __func__, |
1267 | clp->cl_hostname); | |
ad1e3968 TM |
1268 | } |
1269 | ||
042b60be TM |
1270 | void nfs4_schedule_path_down_recovery(struct nfs_client *clp) |
1271 | { | |
ad1e3968 | 1272 | nfs40_handle_cb_pathdown(clp); |
042b60be TM |
1273 | nfs4_schedule_state_manager(clp); |
1274 | } | |
1275 | ||
f9feab1e | 1276 | static int nfs4_state_mark_reclaim_reboot(struct nfs_client *clp, struct nfs4_state *state) |
b79a4a1b TM |
1277 | { |
1278 | ||
1279 | set_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); | |
1280 | /* Don't recover state that expired before the reboot */ | |
1281 | if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) { | |
1282 | clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); | |
1283 | return 0; | |
1284 | } | |
7eff03ae | 1285 | set_bit(NFS_OWNER_RECLAIM_REBOOT, &state->owner->so_flags); |
b79a4a1b TM |
1286 | set_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state); |
1287 | return 1; | |
1288 | } | |
1289 | ||
f9feab1e | 1290 | static int nfs4_state_mark_reclaim_nograce(struct nfs_client *clp, struct nfs4_state *state) |
b79a4a1b TM |
1291 | { |
1292 | set_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags); | |
1293 | clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); | |
7eff03ae | 1294 | set_bit(NFS_OWNER_RECLAIM_NOGRACE, &state->owner->so_flags); |
b79a4a1b TM |
1295 | set_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state); |
1296 | return 1; | |
1297 | } | |
1298 | ||
0400a6b0 TM |
1299 | void nfs4_schedule_stateid_recovery(const struct nfs_server *server, struct nfs4_state *state) |
1300 | { | |
1301 | struct nfs_client *clp = server->nfs_client; | |
1302 | ||
1303 | nfs4_state_mark_reclaim_nograce(clp, state); | |
cc0a9843 TM |
1304 | dprintk("%s: scheduling stateid recovery for server %s\n", __func__, |
1305 | clp->cl_hostname); | |
0400a6b0 TM |
1306 | nfs4_schedule_state_manager(clp); |
1307 | } | |
9cb81968 | 1308 | EXPORT_SYMBOL_GPL(nfs4_schedule_stateid_recovery); |
0400a6b0 | 1309 | |
a1d0b5ee TM |
1310 | void nfs_inode_find_state_and_recover(struct inode *inode, |
1311 | const nfs4_stateid *stateid) | |
1312 | { | |
1313 | struct nfs_client *clp = NFS_SERVER(inode)->nfs_client; | |
1314 | struct nfs_inode *nfsi = NFS_I(inode); | |
1315 | struct nfs_open_context *ctx; | |
1316 | struct nfs4_state *state; | |
1317 | bool found = false; | |
1318 | ||
1319 | spin_lock(&inode->i_lock); | |
1320 | list_for_each_entry(ctx, &nfsi->open_files, list) { | |
1321 | state = ctx->state; | |
1322 | if (state == NULL) | |
1323 | continue; | |
1324 | if (!test_bit(NFS_DELEGATED_STATE, &state->flags)) | |
1325 | continue; | |
f597c537 | 1326 | if (!nfs4_stateid_match(&state->stateid, stateid)) |
a1d0b5ee TM |
1327 | continue; |
1328 | nfs4_state_mark_reclaim_nograce(clp, state); | |
1329 | found = true; | |
1330 | } | |
1331 | spin_unlock(&inode->i_lock); | |
1332 | if (found) | |
1333 | nfs4_schedule_state_manager(clp); | |
1334 | } | |
1335 | ||
1336 | ||
02860014 | 1337 | static int nfs4_reclaim_locks(struct nfs4_state *state, const struct nfs4_state_recovery_ops *ops) |
1da177e4 LT |
1338 | { |
1339 | struct inode *inode = state->inode; | |
19e03c57 | 1340 | struct nfs_inode *nfsi = NFS_I(inode); |
1da177e4 LT |
1341 | struct file_lock *fl; |
1342 | int status = 0; | |
1343 | ||
3f09df70 TM |
1344 | if (inode->i_flock == NULL) |
1345 | return 0; | |
1346 | ||
1347 | /* Guard against delegation returns and new lock/unlock calls */ | |
19e03c57 | 1348 | down_write(&nfsi->rwsem); |
3f09df70 | 1349 | /* Protect inode->i_flock using the BKL */ |
b89f4321 | 1350 | lock_flocks(); |
90dc7d27 | 1351 | for (fl = inode->i_flock; fl != NULL; fl = fl->fl_next) { |
43b2a33a | 1352 | if (!(fl->fl_flags & (FL_POSIX|FL_FLOCK))) |
1da177e4 | 1353 | continue; |
cd3758e3 | 1354 | if (nfs_file_open_context(fl->fl_file)->state != state) |
1da177e4 | 1355 | continue; |
b89f4321 | 1356 | unlock_flocks(); |
1da177e4 | 1357 | status = ops->recover_lock(state, fl); |
1da177e4 | 1358 | switch (status) { |
965b5d67 TM |
1359 | case 0: |
1360 | break; | |
1361 | case -ESTALE: | |
1362 | case -NFS4ERR_ADMIN_REVOKED: | |
1363 | case -NFS4ERR_STALE_STATEID: | |
1364 | case -NFS4ERR_BAD_STATEID: | |
1365 | case -NFS4ERR_EXPIRED: | |
1366 | case -NFS4ERR_NO_GRACE: | |
1367 | case -NFS4ERR_STALE_CLIENTID: | |
9c4c761a TM |
1368 | case -NFS4ERR_BADSESSION: |
1369 | case -NFS4ERR_BADSLOT: | |
1370 | case -NFS4ERR_BAD_HIGH_SLOT: | |
1371 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
965b5d67 | 1372 | goto out; |
1da177e4 | 1373 | default: |
a030889a WAA |
1374 | printk(KERN_ERR "NFS: %s: unhandled error %d. " |
1375 | "Zeroing state\n", __func__, status); | |
965b5d67 TM |
1376 | case -ENOMEM: |
1377 | case -NFS4ERR_DENIED: | |
1da177e4 LT |
1378 | case -NFS4ERR_RECLAIM_BAD: |
1379 | case -NFS4ERR_RECLAIM_CONFLICT: | |
43b2a33a | 1380 | /* kill_proc(fl->fl_pid, SIGLOST, 1); */ |
965b5d67 | 1381 | status = 0; |
1da177e4 | 1382 | } |
b89f4321 | 1383 | lock_flocks(); |
1da177e4 | 1384 | } |
b89f4321 | 1385 | unlock_flocks(); |
965b5d67 | 1386 | out: |
19e03c57 | 1387 | up_write(&nfsi->rwsem); |
1da177e4 LT |
1388 | return status; |
1389 | } | |
1390 | ||
02860014 | 1391 | static int nfs4_reclaim_open_state(struct nfs4_state_owner *sp, const struct nfs4_state_recovery_ops *ops) |
1da177e4 LT |
1392 | { |
1393 | struct nfs4_state *state; | |
1394 | struct nfs4_lock_state *lock; | |
1395 | int status = 0; | |
1396 | ||
1397 | /* Note: we rely on the sp->so_states list being ordered | |
1398 | * so that we always reclaim open(O_RDWR) and/or open(O_WRITE) | |
1399 | * states first. | |
1400 | * This is needed to ensure that the server won't give us any | |
1401 | * read delegations that we have to return if, say, we are | |
1402 | * recovering after a network partition or a reboot from a | |
1403 | * server that doesn't support a grace period. | |
1404 | */ | |
fe1d8195 TM |
1405 | restart: |
1406 | spin_lock(&sp->so_lock); | |
1da177e4 | 1407 | list_for_each_entry(state, &sp->so_states, open_states) { |
b79a4a1b TM |
1408 | if (!test_and_clear_bit(ops->state_flag_bit, &state->flags)) |
1409 | continue; | |
1da177e4 LT |
1410 | if (state->state == 0) |
1411 | continue; | |
fe1d8195 TM |
1412 | atomic_inc(&state->count); |
1413 | spin_unlock(&sp->so_lock); | |
1da177e4 | 1414 | status = ops->recover_open(sp, state); |
1da177e4 | 1415 | if (status >= 0) { |
02860014 TM |
1416 | status = nfs4_reclaim_locks(state, ops); |
1417 | if (status >= 0) { | |
4b44b40e | 1418 | spin_lock(&state->state_lock); |
02860014 | 1419 | list_for_each_entry(lock, &state->lock_states, ls_locks) { |
795a88c9 | 1420 | if (!test_bit(NFS_LOCK_INITIALIZED, &lock->ls_flags)) |
96dcadc2 WD |
1421 | pr_warn_ratelimited("NFS: " |
1422 | "%s: Lock reclaim " | |
a030889a | 1423 | "failed!\n", __func__); |
02860014 | 1424 | } |
4b44b40e | 1425 | spin_unlock(&state->state_lock); |
fe1d8195 TM |
1426 | nfs4_put_open_state(state); |
1427 | goto restart; | |
1da177e4 | 1428 | } |
1da177e4 LT |
1429 | } |
1430 | switch (status) { | |
1431 | default: | |
a030889a WAA |
1432 | printk(KERN_ERR "NFS: %s: unhandled error %d. " |
1433 | "Zeroing state\n", __func__, status); | |
1da177e4 | 1434 | case -ENOENT: |
965b5d67 | 1435 | case -ENOMEM: |
b79a4a1b | 1436 | case -ESTALE: |
1da177e4 LT |
1437 | /* |
1438 | * Open state on this file cannot be recovered | |
1439 | * All we can do is revert to using the zero stateid. | |
1440 | */ | |
2d2f24ad TM |
1441 | memset(&state->stateid, 0, |
1442 | sizeof(state->stateid)); | |
1da177e4 LT |
1443 | /* Mark the file as being 'closed' */ |
1444 | state->state = 0; | |
1445 | break; | |
168667c4 TM |
1446 | case -EKEYEXPIRED: |
1447 | /* | |
1448 | * User RPCSEC_GSS context has expired. | |
1449 | * We cannot recover this stateid now, so | |
1450 | * skip it and allow recovery thread to | |
1451 | * proceed. | |
1452 | */ | |
1453 | break; | |
965b5d67 TM |
1454 | case -NFS4ERR_ADMIN_REVOKED: |
1455 | case -NFS4ERR_STALE_STATEID: | |
1456 | case -NFS4ERR_BAD_STATEID: | |
b79a4a1b TM |
1457 | case -NFS4ERR_RECLAIM_BAD: |
1458 | case -NFS4ERR_RECLAIM_CONFLICT: | |
1f0e890d | 1459 | nfs4_state_mark_reclaim_nograce(sp->so_server->nfs_client, state); |
b79a4a1b | 1460 | break; |
1da177e4 LT |
1461 | case -NFS4ERR_EXPIRED: |
1462 | case -NFS4ERR_NO_GRACE: | |
1f0e890d | 1463 | nfs4_state_mark_reclaim_nograce(sp->so_server->nfs_client, state); |
1da177e4 | 1464 | case -NFS4ERR_STALE_CLIENTID: |
9c4c761a TM |
1465 | case -NFS4ERR_BADSESSION: |
1466 | case -NFS4ERR_BADSLOT: | |
1467 | case -NFS4ERR_BAD_HIGH_SLOT: | |
1468 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
1da177e4 LT |
1469 | goto out_err; |
1470 | } | |
fe1d8195 TM |
1471 | nfs4_put_open_state(state); |
1472 | goto restart; | |
1da177e4 | 1473 | } |
fe1d8195 | 1474 | spin_unlock(&sp->so_lock); |
1da177e4 LT |
1475 | return 0; |
1476 | out_err: | |
fe1d8195 | 1477 | nfs4_put_open_state(state); |
1da177e4 LT |
1478 | return status; |
1479 | } | |
1480 | ||
b79a4a1b TM |
1481 | static void nfs4_clear_open_state(struct nfs4_state *state) |
1482 | { | |
1483 | struct nfs4_lock_state *lock; | |
1484 | ||
1485 | clear_bit(NFS_DELEGATED_STATE, &state->flags); | |
1486 | clear_bit(NFS_O_RDONLY_STATE, &state->flags); | |
1487 | clear_bit(NFS_O_WRONLY_STATE, &state->flags); | |
1488 | clear_bit(NFS_O_RDWR_STATE, &state->flags); | |
4b44b40e | 1489 | spin_lock(&state->state_lock); |
b79a4a1b | 1490 | list_for_each_entry(lock, &state->lock_states, ls_locks) { |
b79a4a1b | 1491 | lock->ls_seqid.flags = 0; |
795a88c9 | 1492 | clear_bit(NFS_LOCK_INITIALIZED, &lock->ls_flags); |
b79a4a1b | 1493 | } |
4b44b40e | 1494 | spin_unlock(&state->state_lock); |
b79a4a1b TM |
1495 | } |
1496 | ||
24d292b8 CL |
1497 | static void nfs4_reset_seqids(struct nfs_server *server, |
1498 | int (*mark_reclaim)(struct nfs_client *clp, struct nfs4_state *state)) | |
cee54fc9 | 1499 | { |
24d292b8 | 1500 | struct nfs_client *clp = server->nfs_client; |
cee54fc9 | 1501 | struct nfs4_state_owner *sp; |
9f958ab8 | 1502 | struct rb_node *pos; |
cee54fc9 | 1503 | struct nfs4_state *state; |
cee54fc9 | 1504 | |
24d292b8 CL |
1505 | spin_lock(&clp->cl_lock); |
1506 | for (pos = rb_first(&server->state_owners); | |
1507 | pos != NULL; | |
1508 | pos = rb_next(pos)) { | |
1509 | sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); | |
cee54fc9 | 1510 | sp->so_seqid.flags = 0; |
ec073428 | 1511 | spin_lock(&sp->so_lock); |
cee54fc9 | 1512 | list_for_each_entry(state, &sp->so_states, open_states) { |
b79a4a1b TM |
1513 | if (mark_reclaim(clp, state)) |
1514 | nfs4_clear_open_state(state); | |
cee54fc9 | 1515 | } |
ec073428 | 1516 | spin_unlock(&sp->so_lock); |
cee54fc9 | 1517 | } |
24d292b8 CL |
1518 | spin_unlock(&clp->cl_lock); |
1519 | } | |
1520 | ||
1521 | static void nfs4_state_mark_reclaim_helper(struct nfs_client *clp, | |
1522 | int (*mark_reclaim)(struct nfs_client *clp, struct nfs4_state *state)) | |
1523 | { | |
1524 | struct nfs_server *server; | |
1525 | ||
1526 | rcu_read_lock(); | |
1527 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) | |
1528 | nfs4_reset_seqids(server, mark_reclaim); | |
1529 | rcu_read_unlock(); | |
cee54fc9 TM |
1530 | } |
1531 | ||
b79a4a1b TM |
1532 | static void nfs4_state_start_reclaim_reboot(struct nfs_client *clp) |
1533 | { | |
1534 | /* Mark all delegations for reclaim */ | |
1535 | nfs_delegation_mark_reclaim(clp); | |
1536 | nfs4_state_mark_reclaim_helper(clp, nfs4_state_mark_reclaim_reboot); | |
1537 | } | |
1538 | ||
fce5c838 RL |
1539 | static void nfs4_reclaim_complete(struct nfs_client *clp, |
1540 | const struct nfs4_state_recovery_ops *ops) | |
1541 | { | |
1542 | /* Notify the server we're done reclaiming our state */ | |
1543 | if (ops->reclaim_complete) | |
1544 | (void)ops->reclaim_complete(clp); | |
1545 | } | |
1546 | ||
24d292b8 | 1547 | static void nfs4_clear_reclaim_server(struct nfs_server *server) |
b79a4a1b | 1548 | { |
24d292b8 | 1549 | struct nfs_client *clp = server->nfs_client; |
b79a4a1b TM |
1550 | struct nfs4_state_owner *sp; |
1551 | struct rb_node *pos; | |
1552 | struct nfs4_state *state; | |
1553 | ||
24d292b8 CL |
1554 | spin_lock(&clp->cl_lock); |
1555 | for (pos = rb_first(&server->state_owners); | |
1556 | pos != NULL; | |
1557 | pos = rb_next(pos)) { | |
1558 | sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); | |
b79a4a1b TM |
1559 | spin_lock(&sp->so_lock); |
1560 | list_for_each_entry(state, &sp->so_states, open_states) { | |
24d292b8 CL |
1561 | if (!test_and_clear_bit(NFS_STATE_RECLAIM_REBOOT, |
1562 | &state->flags)) | |
b79a4a1b TM |
1563 | continue; |
1564 | nfs4_state_mark_reclaim_nograce(clp, state); | |
1565 | } | |
1566 | spin_unlock(&sp->so_lock); | |
1567 | } | |
24d292b8 CL |
1568 | spin_unlock(&clp->cl_lock); |
1569 | } | |
1570 | ||
1571 | static int nfs4_state_clear_reclaim_reboot(struct nfs_client *clp) | |
1572 | { | |
1573 | struct nfs_server *server; | |
1574 | ||
1575 | if (!test_and_clear_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) | |
1576 | return 0; | |
1577 | ||
1578 | rcu_read_lock(); | |
1579 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) | |
1580 | nfs4_clear_reclaim_server(server); | |
1581 | rcu_read_unlock(); | |
b79a4a1b TM |
1582 | |
1583 | nfs_delegation_reap_unclaimed(clp); | |
6eaa6149 TM |
1584 | return 1; |
1585 | } | |
1586 | ||
1587 | static void nfs4_state_end_reclaim_reboot(struct nfs_client *clp) | |
1588 | { | |
1589 | if (!nfs4_state_clear_reclaim_reboot(clp)) | |
1590 | return; | |
1591 | nfs4_reclaim_complete(clp, clp->cl_mvops->reboot_recovery_ops); | |
b79a4a1b TM |
1592 | } |
1593 | ||
1594 | static void nfs_delegation_clear_all(struct nfs_client *clp) | |
1595 | { | |
1596 | nfs_delegation_mark_reclaim(clp); | |
1597 | nfs_delegation_reap_unclaimed(clp); | |
1598 | } | |
1599 | ||
1600 | static void nfs4_state_start_reclaim_nograce(struct nfs_client *clp) | |
1601 | { | |
1602 | nfs_delegation_clear_all(clp); | |
1603 | nfs4_state_mark_reclaim_helper(clp, nfs4_state_mark_reclaim_nograce); | |
1604 | } | |
1605 | ||
168667c4 TM |
1606 | static void nfs4_warn_keyexpired(const char *s) |
1607 | { | |
1608 | printk_ratelimited(KERN_WARNING "Error: state manager" | |
1609 | " encountered RPCSEC_GSS session" | |
1610 | " expired against NFSv4 server %s.\n", | |
1611 | s); | |
1612 | } | |
1613 | ||
4f7cdf18 | 1614 | static int nfs4_recovery_handle_error(struct nfs_client *clp, int error) |
e598d843 TM |
1615 | { |
1616 | switch (error) { | |
4f38e4aa TM |
1617 | case 0: |
1618 | break; | |
e598d843 | 1619 | case -NFS4ERR_CB_PATH_DOWN: |
ad1e3968 | 1620 | nfs40_handle_cb_pathdown(clp); |
4f38e4aa | 1621 | break; |
c8b7ae3d TM |
1622 | case -NFS4ERR_NO_GRACE: |
1623 | nfs4_state_end_reclaim_reboot(clp); | |
4f38e4aa | 1624 | break; |
e598d843 TM |
1625 | case -NFS4ERR_STALE_CLIENTID: |
1626 | case -NFS4ERR_LEASE_MOVED: | |
1627 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
6eaa6149 | 1628 | nfs4_state_clear_reclaim_reboot(clp); |
e598d843 TM |
1629 | nfs4_state_start_reclaim_reboot(clp); |
1630 | break; | |
1631 | case -NFS4ERR_EXPIRED: | |
1632 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1633 | nfs4_state_start_reclaim_nograce(clp); | |
8ba9bf8e | 1634 | break; |
c3fad1b1 AA |
1635 | case -NFS4ERR_BADSESSION: |
1636 | case -NFS4ERR_BADSLOT: | |
1637 | case -NFS4ERR_BAD_HIGH_SLOT: | |
1638 | case -NFS4ERR_DEADSESSION: | |
c3fad1b1 AA |
1639 | case -NFS4ERR_SEQ_FALSE_RETRY: |
1640 | case -NFS4ERR_SEQ_MISORDERED: | |
6df08189 | 1641 | set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); |
0b9e2d41 | 1642 | /* Zero session reset errors */ |
4f38e4aa | 1643 | break; |
7c5d7256 TM |
1644 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: |
1645 | set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); | |
1646 | break; | |
168667c4 TM |
1647 | case -EKEYEXPIRED: |
1648 | /* Nothing we can do */ | |
1649 | nfs4_warn_keyexpired(clp->cl_hostname); | |
4f38e4aa TM |
1650 | break; |
1651 | default: | |
cc0a9843 TM |
1652 | dprintk("%s: failed to handle error %d for server %s\n", |
1653 | __func__, error, clp->cl_hostname); | |
4f38e4aa | 1654 | return error; |
e598d843 | 1655 | } |
cc0a9843 TM |
1656 | dprintk("%s: handled error %d for server %s\n", __func__, error, |
1657 | clp->cl_hostname); | |
4f38e4aa | 1658 | return 0; |
e598d843 TM |
1659 | } |
1660 | ||
02860014 | 1661 | static int nfs4_do_reclaim(struct nfs_client *clp, const struct nfs4_state_recovery_ops *ops) |
1da177e4 | 1662 | { |
24d292b8 CL |
1663 | struct nfs4_state_owner *sp; |
1664 | struct nfs_server *server; | |
9f958ab8 | 1665 | struct rb_node *pos; |
1da177e4 LT |
1666 | int status = 0; |
1667 | ||
7eff03ae | 1668 | restart: |
24d292b8 CL |
1669 | rcu_read_lock(); |
1670 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { | |
0aaaf5c4 | 1671 | nfs4_purge_state_owners(server); |
24d292b8 CL |
1672 | spin_lock(&clp->cl_lock); |
1673 | for (pos = rb_first(&server->state_owners); | |
1674 | pos != NULL; | |
1675 | pos = rb_next(pos)) { | |
1676 | sp = rb_entry(pos, | |
1677 | struct nfs4_state_owner, so_server_node); | |
1678 | if (!test_and_clear_bit(ops->owner_flag_bit, | |
1679 | &sp->so_flags)) | |
1680 | continue; | |
1681 | atomic_inc(&sp->so_count); | |
1682 | spin_unlock(&clp->cl_lock); | |
1683 | rcu_read_unlock(); | |
1684 | ||
1685 | status = nfs4_reclaim_open_state(sp, ops); | |
1686 | if (status < 0) { | |
1687 | set_bit(ops->owner_flag_bit, &sp->so_flags); | |
1688 | nfs4_put_state_owner(sp); | |
1689 | return nfs4_recovery_handle_error(clp, status); | |
1690 | } | |
1691 | ||
7eff03ae | 1692 | nfs4_put_state_owner(sp); |
24d292b8 | 1693 | goto restart; |
7eff03ae | 1694 | } |
24d292b8 | 1695 | spin_unlock(&clp->cl_lock); |
02860014 | 1696 | } |
24d292b8 | 1697 | rcu_read_unlock(); |
02860014 TM |
1698 | return status; |
1699 | } | |
1700 | ||
1701 | static int nfs4_check_lease(struct nfs_client *clp) | |
1702 | { | |
1703 | struct rpc_cred *cred; | |
c48f4f35 TM |
1704 | const struct nfs4_state_maintenance_ops *ops = |
1705 | clp->cl_mvops->state_renewal_ops; | |
4f38e4aa | 1706 | int status; |
1da177e4 | 1707 | |
0f605b56 TM |
1708 | /* Is the client already known to have an expired lease? */ |
1709 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) | |
1710 | return 0; | |
a7b72103 AA |
1711 | spin_lock(&clp->cl_lock); |
1712 | cred = ops->get_state_renewal_cred_locked(clp); | |
1713 | spin_unlock(&clp->cl_lock); | |
0f605b56 TM |
1714 | if (cred == NULL) { |
1715 | cred = nfs4_get_setclientid_cred(clp); | |
4f38e4aa | 1716 | status = -ENOKEY; |
0f605b56 TM |
1717 | if (cred == NULL) |
1718 | goto out; | |
286d7d6a | 1719 | } |
8e69514f | 1720 | status = ops->renew_lease(clp, cred); |
0f605b56 TM |
1721 | put_rpccred(cred); |
1722 | out: | |
4f7cdf18 | 1723 | return nfs4_recovery_handle_error(clp, status); |
02860014 TM |
1724 | } |
1725 | ||
47b803c8 AA |
1726 | /* Set NFS4CLNT_LEASE_EXPIRED and reclaim reboot state for all v4.0 errors |
1727 | * and for recoverable errors on EXCHANGE_ID for v4.1 | |
2a6ee6aa TM |
1728 | */ |
1729 | static int nfs4_handle_reclaim_lease_error(struct nfs_client *clp, int status) | |
1730 | { | |
1731 | switch (status) { | |
89a21736 TM |
1732 | case -NFS4ERR_SEQ_MISORDERED: |
1733 | if (test_and_set_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) | |
1734 | return -ESERVERFAULT; | |
1735 | /* Lease confirmation error: retry after purging the lease */ | |
1736 | ssleep(1); | |
47b803c8 AA |
1737 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
1738 | break; | |
2a6ee6aa TM |
1739 | case -NFS4ERR_STALE_CLIENTID: |
1740 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); | |
47b803c8 AA |
1741 | nfs4_state_clear_reclaim_reboot(clp); |
1742 | nfs4_state_start_reclaim_reboot(clp); | |
2a6ee6aa | 1743 | break; |
de734831 CL |
1744 | case -NFS4ERR_CLID_INUSE: |
1745 | pr_err("NFS: Server %s reports our clientid is in use\n", | |
1746 | clp->cl_hostname); | |
1747 | nfs_mark_client_ready(clp, -EPERM); | |
1748 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); | |
1749 | return -EPERM; | |
2a6ee6aa TM |
1750 | case -EACCES: |
1751 | if (clp->cl_machine_cred == NULL) | |
1752 | return -EACCES; | |
1753 | /* Handle case where the user hasn't set up machine creds */ | |
1754 | nfs4_clear_machine_cred(clp); | |
1755 | case -NFS4ERR_DELAY: | |
1756 | case -ETIMEDOUT: | |
1757 | case -EAGAIN: | |
1758 | ssleep(1); | |
1759 | break; | |
1760 | ||
1761 | case -NFS4ERR_MINOR_VERS_MISMATCH: | |
1762 | if (clp->cl_cons_state == NFS_CS_SESSION_INITING) | |
1763 | nfs_mark_client_ready(clp, -EPROTONOSUPPORT); | |
cc0a9843 TM |
1764 | dprintk("%s: exit with error %d for server %s\n", |
1765 | __func__, -EPROTONOSUPPORT, clp->cl_hostname); | |
2a6ee6aa TM |
1766 | return -EPROTONOSUPPORT; |
1767 | case -EKEYEXPIRED: | |
1768 | nfs4_warn_keyexpired(clp->cl_hostname); | |
1769 | case -NFS4ERR_NOT_SAME: /* FixMe: implement recovery | |
1770 | * in nfs4_exchange_id */ | |
1771 | default: | |
cc0a9843 TM |
1772 | dprintk("%s: exit with error %d for server %s\n", __func__, |
1773 | status, clp->cl_hostname); | |
2a6ee6aa TM |
1774 | return status; |
1775 | } | |
1776 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
cc0a9843 TM |
1777 | dprintk("%s: handled error %d for server %s\n", __func__, status, |
1778 | clp->cl_hostname); | |
2a6ee6aa TM |
1779 | return 0; |
1780 | } | |
1781 | ||
b42353ff | 1782 | static int nfs4_establish_lease(struct nfs_client *clp) |
02860014 TM |
1783 | { |
1784 | struct rpc_cred *cred; | |
c48f4f35 TM |
1785 | const struct nfs4_state_recovery_ops *ops = |
1786 | clp->cl_mvops->reboot_recovery_ops; | |
2a6ee6aa | 1787 | int status; |
02860014 | 1788 | |
90a16617 | 1789 | cred = ops->get_clid_cred(clp); |
2a6ee6aa TM |
1790 | if (cred == NULL) |
1791 | return -ENOENT; | |
1792 | status = ops->establish_clid(clp, cred); | |
1793 | put_rpccred(cred); | |
1794 | if (status != 0) | |
b42353ff TM |
1795 | return status; |
1796 | pnfs_destroy_all_layouts(clp); | |
1797 | return 0; | |
1798 | } | |
1799 | ||
6bbb4ae8 CL |
1800 | /* |
1801 | * Returns zero or a negative errno. NFS4ERR values are converted | |
1802 | * to local errno values. | |
1803 | */ | |
b42353ff TM |
1804 | static int nfs4_reclaim_lease(struct nfs_client *clp) |
1805 | { | |
1806 | int status; | |
1807 | ||
1808 | status = nfs4_establish_lease(clp); | |
1809 | if (status < 0) | |
1810 | return nfs4_handle_reclaim_lease_error(clp, status); | |
1811 | if (test_and_clear_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state)) | |
1812 | nfs4_state_start_reclaim_nograce(clp); | |
1813 | if (!test_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) | |
1814 | set_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state); | |
1815 | clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); | |
1816 | clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1817 | return 0; | |
1818 | } | |
1819 | ||
1820 | static int nfs4_purge_lease(struct nfs_client *clp) | |
1821 | { | |
1822 | int status; | |
1823 | ||
1824 | status = nfs4_establish_lease(clp); | |
1825 | if (status < 0) | |
2a6ee6aa | 1826 | return nfs4_handle_reclaim_lease_error(clp, status); |
b42353ff TM |
1827 | clear_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state); |
1828 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1829 | nfs4_state_start_reclaim_nograce(clp); | |
2a6ee6aa | 1830 | return 0; |
02860014 TM |
1831 | } |
1832 | ||
05f4c350 CL |
1833 | /** |
1834 | * nfs4_discover_server_trunking - Detect server IP address trunking | |
1835 | * | |
1836 | * @clp: nfs_client under test | |
1837 | * @result: OUT: found nfs_client, or clp | |
1838 | * | |
1839 | * Returns zero or a negative errno. If zero is returned, | |
1840 | * an nfs_client pointer is planted in "result". | |
1841 | * | |
1842 | * Note: since we are invoked in process context, and | |
1843 | * not from inside the state manager, we cannot use | |
1844 | * nfs4_handle_reclaim_lease_error(). | |
1845 | */ | |
1846 | int nfs4_discover_server_trunking(struct nfs_client *clp, | |
1847 | struct nfs_client **result) | |
1848 | { | |
1849 | const struct nfs4_state_recovery_ops *ops = | |
1850 | clp->cl_mvops->reboot_recovery_ops; | |
1851 | rpc_authflavor_t *flavors, flav, save; | |
1852 | struct rpc_clnt *clnt; | |
1853 | struct rpc_cred *cred; | |
1854 | int i, len, status; | |
1855 | ||
1856 | dprintk("NFS: %s: testing '%s'\n", __func__, clp->cl_hostname); | |
1857 | ||
1858 | len = NFS_MAX_SECFLAVORS; | |
1859 | flavors = kcalloc(len, sizeof(*flavors), GFP_KERNEL); | |
1860 | if (flavors == NULL) { | |
1861 | status = -ENOMEM; | |
1862 | goto out; | |
1863 | } | |
1864 | len = rpcauth_list_flavors(flavors, len); | |
1865 | if (len < 0) { | |
1866 | status = len; | |
1867 | goto out_free; | |
1868 | } | |
1869 | clnt = clp->cl_rpcclient; | |
1870 | save = clnt->cl_auth->au_flavor; | |
1871 | i = 0; | |
1872 | ||
1873 | mutex_lock(&nfs_clid_init_mutex); | |
1874 | status = -ENOENT; | |
1875 | again: | |
1876 | cred = ops->get_clid_cred(clp); | |
1877 | if (cred == NULL) | |
1878 | goto out_unlock; | |
1879 | ||
1880 | status = ops->detect_trunking(clp, result, cred); | |
1881 | put_rpccred(cred); | |
1882 | switch (status) { | |
1883 | case 0: | |
1884 | break; | |
1885 | ||
1886 | case -EACCES: | |
1887 | if (clp->cl_machine_cred == NULL) | |
1888 | break; | |
1889 | /* Handle case where the user hasn't set up machine creds */ | |
1890 | nfs4_clear_machine_cred(clp); | |
1891 | case -NFS4ERR_DELAY: | |
1892 | case -ETIMEDOUT: | |
1893 | case -EAGAIN: | |
1894 | ssleep(1); | |
1895 | dprintk("NFS: %s after status %d, retrying\n", | |
1896 | __func__, status); | |
1897 | goto again; | |
1898 | ||
1899 | case -NFS4ERR_CLID_INUSE: | |
1900 | case -NFS4ERR_WRONGSEC: | |
1901 | status = -EPERM; | |
1902 | if (i >= len) | |
1903 | break; | |
1904 | ||
1905 | flav = flavors[i++]; | |
1906 | if (flav == save) | |
1907 | flav = flavors[i++]; | |
1908 | clnt = rpc_clone_client_set_auth(clnt, flav); | |
1909 | if (IS_ERR(clnt)) { | |
1910 | status = PTR_ERR(clnt); | |
1911 | break; | |
1912 | } | |
1913 | clp->cl_rpcclient = clnt; | |
1914 | goto again; | |
1915 | ||
1916 | case -NFS4ERR_MINOR_VERS_MISMATCH: | |
1917 | status = -EPROTONOSUPPORT; | |
1918 | break; | |
1919 | ||
1920 | case -EKEYEXPIRED: | |
1921 | nfs4_warn_keyexpired(clp->cl_hostname); | |
1922 | case -NFS4ERR_NOT_SAME: /* FixMe: implement recovery | |
1923 | * in nfs4_exchange_id */ | |
1924 | status = -EKEYEXPIRED; | |
1925 | } | |
1926 | ||
1927 | out_unlock: | |
1928 | mutex_unlock(&nfs_clid_init_mutex); | |
1929 | out_free: | |
1930 | kfree(flavors); | |
1931 | out: | |
1932 | dprintk("NFS: %s: status = %d\n", __func__, status); | |
1933 | return status; | |
1934 | } | |
1935 | ||
76db6d95 | 1936 | #ifdef CONFIG_NFS_V4_1 |
9f594791 | 1937 | void nfs4_schedule_session_recovery(struct nfs4_session *session, int err) |
0400a6b0 | 1938 | { |
444f72fe TM |
1939 | struct nfs_client *clp = session->clp; |
1940 | ||
9f594791 TM |
1941 | switch (err) { |
1942 | default: | |
1943 | set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); | |
1944 | break; | |
1945 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
1946 | set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); | |
1947 | } | |
444f72fe | 1948 | nfs4_schedule_lease_recovery(clp); |
0400a6b0 | 1949 | } |
cbdabc7f | 1950 | EXPORT_SYMBOL_GPL(nfs4_schedule_session_recovery); |
0400a6b0 | 1951 | |
ac074835 TM |
1952 | static void nfs41_ping_server(struct nfs_client *clp) |
1953 | { | |
1954 | /* Use CHECK_LEASE to ping the server with a SEQUENCE */ | |
1955 | set_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); | |
1956 | nfs4_schedule_state_manager(clp); | |
1957 | } | |
1958 | ||
1959 | void nfs41_server_notify_target_slotid_update(struct nfs_client *clp) | |
1960 | { | |
1961 | nfs41_ping_server(clp); | |
1962 | } | |
1963 | ||
0f79fd6f TM |
1964 | static void nfs4_reset_all_state(struct nfs_client *clp) |
1965 | { | |
1966 | if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) == 0) { | |
2c820d9a | 1967 | set_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state); |
be0bfed0 | 1968 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
0f79fd6f | 1969 | nfs4_state_start_reclaim_nograce(clp); |
cc0a9843 TM |
1970 | dprintk("%s: scheduling reset of all state for server %s!\n", |
1971 | __func__, clp->cl_hostname); | |
0400a6b0 | 1972 | nfs4_schedule_state_manager(clp); |
0f79fd6f TM |
1973 | } |
1974 | } | |
1975 | ||
1976 | static void nfs41_handle_server_reboot(struct nfs_client *clp) | |
1977 | { | |
1978 | if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) == 0) { | |
1979 | nfs4_state_start_reclaim_reboot(clp); | |
cc0a9843 TM |
1980 | dprintk("%s: server %s rebooted!\n", __func__, |
1981 | clp->cl_hostname); | |
0400a6b0 | 1982 | nfs4_schedule_state_manager(clp); |
0f79fd6f TM |
1983 | } |
1984 | } | |
1985 | ||
1986 | static void nfs41_handle_state_revoked(struct nfs_client *clp) | |
1987 | { | |
0f79fd6f | 1988 | nfs4_reset_all_state(clp); |
cc0a9843 | 1989 | dprintk("%s: state revoked on server %s\n", __func__, clp->cl_hostname); |
0f79fd6f TM |
1990 | } |
1991 | ||
1992 | static void nfs41_handle_recallable_state_revoked(struct nfs_client *clp) | |
1993 | { | |
1994 | /* This will need to handle layouts too */ | |
1995 | nfs_expire_all_delegations(clp); | |
cc0a9843 TM |
1996 | dprintk("%s: Recallable state revoked on server %s!\n", __func__, |
1997 | clp->cl_hostname); | |
0f79fd6f TM |
1998 | } |
1999 | ||
a9e64442 | 2000 | static void nfs41_handle_backchannel_fault(struct nfs_client *clp) |
0f79fd6f TM |
2001 | { |
2002 | nfs_expire_all_delegations(clp); | |
2003 | if (test_and_set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state) == 0) | |
0400a6b0 | 2004 | nfs4_schedule_state_manager(clp); |
cc0a9843 TM |
2005 | dprintk("%s: server %s declared a backchannel fault\n", __func__, |
2006 | clp->cl_hostname); | |
0f79fd6f TM |
2007 | } |
2008 | ||
a9e64442 WAA |
2009 | static void nfs41_handle_cb_path_down(struct nfs_client *clp) |
2010 | { | |
2011 | if (test_and_set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, | |
2012 | &clp->cl_state) == 0) | |
2013 | nfs4_schedule_state_manager(clp); | |
2014 | } | |
2015 | ||
0629e370 AB |
2016 | void nfs41_handle_sequence_flag_errors(struct nfs_client *clp, u32 flags) |
2017 | { | |
2018 | if (!flags) | |
2019 | return; | |
2c820d9a CL |
2020 | |
2021 | dprintk("%s: \"%s\" (client ID %llx) flags=0x%08x\n", | |
2022 | __func__, clp->cl_hostname, clp->cl_clientid, flags); | |
2023 | ||
111d489f | 2024 | if (flags & SEQ4_STATUS_RESTART_RECLAIM_NEEDED) |
0f79fd6f | 2025 | nfs41_handle_server_reboot(clp); |
111d489f | 2026 | if (flags & (SEQ4_STATUS_EXPIRED_ALL_STATE_REVOKED | |
0629e370 AB |
2027 | SEQ4_STATUS_EXPIRED_SOME_STATE_REVOKED | |
2028 | SEQ4_STATUS_ADMIN_STATE_REVOKED | | |
0f79fd6f TM |
2029 | SEQ4_STATUS_LEASE_MOVED)) |
2030 | nfs41_handle_state_revoked(clp); | |
111d489f | 2031 | if (flags & SEQ4_STATUS_RECALLABLE_STATE_REVOKED) |
0f79fd6f | 2032 | nfs41_handle_recallable_state_revoked(clp); |
a9e64442 WAA |
2033 | if (flags & SEQ4_STATUS_BACKCHANNEL_FAULT) |
2034 | nfs41_handle_backchannel_fault(clp); | |
2035 | else if (flags & (SEQ4_STATUS_CB_PATH_DOWN | | |
2036 | SEQ4_STATUS_CB_PATH_DOWN_SESSION)) | |
0f79fd6f | 2037 | nfs41_handle_cb_path_down(clp); |
0629e370 AB |
2038 | } |
2039 | ||
c3fad1b1 AA |
2040 | static int nfs4_reset_session(struct nfs_client *clp) |
2041 | { | |
848f5bda | 2042 | struct rpc_cred *cred; |
c3fad1b1 AA |
2043 | int status; |
2044 | ||
1a47e7a6 TM |
2045 | if (!nfs4_has_session(clp)) |
2046 | return 0; | |
38045412 | 2047 | nfs4_begin_drain_session(clp); |
848f5bda TM |
2048 | cred = nfs4_get_exchange_id_cred(clp); |
2049 | status = nfs4_proc_destroy_session(clp->cl_session, cred); | |
c3fad1b1 AA |
2050 | if (status && status != -NFS4ERR_BADSESSION && |
2051 | status != -NFS4ERR_DEADSESSION) { | |
f455848a | 2052 | status = nfs4_recovery_handle_error(clp, status); |
c3fad1b1 AA |
2053 | goto out; |
2054 | } | |
2055 | ||
2056 | memset(clp->cl_session->sess_id.data, 0, NFS4_MAX_SESSIONID_LEN); | |
848f5bda | 2057 | status = nfs4_proc_create_session(clp, cred); |
41f54a55 | 2058 | if (status) { |
cc0a9843 TM |
2059 | dprintk("%s: session reset failed with status %d for server %s!\n", |
2060 | __func__, status, clp->cl_hostname); | |
f2c1b510 | 2061 | status = nfs4_handle_reclaim_lease_error(clp, status); |
41f54a55 AA |
2062 | goto out; |
2063 | } | |
bda197f5 | 2064 | nfs41_finish_session_reset(clp); |
cc0a9843 TM |
2065 | dprintk("%s: session reset was successful for server %s!\n", |
2066 | __func__, clp->cl_hostname); | |
41f54a55 | 2067 | out: |
848f5bda TM |
2068 | if (cred) |
2069 | put_rpccred(cred); | |
c3fad1b1 AA |
2070 | return status; |
2071 | } | |
76db6d95 | 2072 | |
a9e64442 WAA |
2073 | static int nfs4_bind_conn_to_session(struct nfs_client *clp) |
2074 | { | |
2cf047c9 TM |
2075 | struct rpc_cred *cred; |
2076 | int ret; | |
2077 | ||
1a47e7a6 TM |
2078 | if (!nfs4_has_session(clp)) |
2079 | return 0; | |
43ac544c | 2080 | nfs4_begin_drain_session(clp); |
2cf047c9 TM |
2081 | cred = nfs4_get_exchange_id_cred(clp); |
2082 | ret = nfs4_proc_bind_conn_to_session(clp, cred); | |
2083 | if (cred) | |
2084 | put_rpccred(cred); | |
43ac544c | 2085 | clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); |
bf674c82 TM |
2086 | switch (ret) { |
2087 | case 0: | |
cc0a9843 TM |
2088 | dprintk("%s: bind_conn_to_session was successful for server %s!\n", |
2089 | __func__, clp->cl_hostname); | |
bf674c82 TM |
2090 | break; |
2091 | case -NFS4ERR_DELAY: | |
2092 | ssleep(1); | |
2093 | set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); | |
2094 | break; | |
2095 | default: | |
2096 | return nfs4_recovery_handle_error(clp, ret); | |
2097 | } | |
2098 | return 0; | |
a9e64442 | 2099 | } |
76db6d95 | 2100 | #else /* CONFIG_NFS_V4_1 */ |
c3fad1b1 | 2101 | static int nfs4_reset_session(struct nfs_client *clp) { return 0; } |
5601a00d | 2102 | static int nfs4_end_drain_session(struct nfs_client *clp) { return 0; } |
a9e64442 WAA |
2103 | |
2104 | static int nfs4_bind_conn_to_session(struct nfs_client *clp) | |
2105 | { | |
2106 | return 0; | |
2107 | } | |
76db6d95 AA |
2108 | #endif /* CONFIG_NFS_V4_1 */ |
2109 | ||
e005e804 | 2110 | static void nfs4_state_manager(struct nfs_client *clp) |
02860014 | 2111 | { |
02860014 | 2112 | int status = 0; |
8ed27d4f | 2113 | const char *section = "", *section_sep = ""; |
02860014 | 2114 | |
02860014 | 2115 | /* Ensure exclusive access to NFSv4 state */ |
47c2199b | 2116 | do { |
2c820d9a | 2117 | if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) { |
8ed27d4f | 2118 | section = "purge state"; |
b42353ff | 2119 | status = nfs4_purge_lease(clp); |
2a6ee6aa TM |
2120 | if (status < 0) |
2121 | goto out_error; | |
b42353ff | 2122 | continue; |
2c820d9a CL |
2123 | } |
2124 | ||
b42353ff | 2125 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) { |
8ed27d4f | 2126 | section = "lease expired"; |
b79a4a1b TM |
2127 | /* We're going to have to re-establish a clientid */ |
2128 | status = nfs4_reclaim_lease(clp); | |
2a6ee6aa | 2129 | if (status < 0) |
b79a4a1b | 2130 | goto out_error; |
b42353ff | 2131 | continue; |
e598d843 TM |
2132 | } |
2133 | ||
c3fad1b1 | 2134 | /* Initialize or reset the session */ |
1a47e7a6 | 2135 | if (test_and_clear_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state)) { |
8ed27d4f | 2136 | section = "reset session"; |
4d643d1d | 2137 | status = nfs4_reset_session(clp); |
b6d408ba TM |
2138 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
2139 | continue; | |
2140 | if (status < 0) | |
76db6d95 | 2141 | goto out_error; |
76db6d95 | 2142 | } |
b6d408ba | 2143 | |
a9e64442 WAA |
2144 | /* Send BIND_CONN_TO_SESSION */ |
2145 | if (test_and_clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION, | |
1a47e7a6 | 2146 | &clp->cl_state)) { |
8ed27d4f | 2147 | section = "bind conn to session"; |
a9e64442 WAA |
2148 | status = nfs4_bind_conn_to_session(clp); |
2149 | if (status < 0) | |
2150 | goto out_error; | |
bf674c82 | 2151 | continue; |
a9e64442 WAA |
2152 | } |
2153 | ||
5df904ae TM |
2154 | if (test_and_clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state)) { |
2155 | section = "check lease"; | |
2156 | status = nfs4_check_lease(clp); | |
2157 | if (status < 0) | |
2158 | goto out_error; | |
2159 | continue; | |
2160 | } | |
2161 | ||
b79a4a1b | 2162 | /* First recover reboot state... */ |
e345e88a | 2163 | if (test_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) { |
8ed27d4f | 2164 | section = "reclaim reboot"; |
591d71cb | 2165 | status = nfs4_do_reclaim(clp, |
c48f4f35 | 2166 | clp->cl_mvops->reboot_recovery_ops); |
b6d408ba | 2167 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) || |
6df08189 | 2168 | test_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state)) |
c3fad1b1 | 2169 | continue; |
b79a4a1b | 2170 | nfs4_state_end_reclaim_reboot(clp); |
b6d408ba TM |
2171 | if (test_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) |
2172 | continue; | |
2173 | if (status < 0) | |
2174 | goto out_error; | |
02860014 TM |
2175 | } |
2176 | ||
b79a4a1b TM |
2177 | /* Now recover expired state... */ |
2178 | if (test_and_clear_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) { | |
8ed27d4f | 2179 | section = "reclaim nograce"; |
591d71cb | 2180 | status = nfs4_do_reclaim(clp, |
c48f4f35 | 2181 | clp->cl_mvops->nograce_recovery_ops); |
b6d408ba | 2182 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) || |
6df08189 | 2183 | test_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state) || |
b6d408ba TM |
2184 | test_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) |
2185 | continue; | |
2186 | if (status < 0) | |
b79a4a1b | 2187 | goto out_error; |
1da177e4 | 2188 | } |
707fb4b3 | 2189 | |
5601a00d | 2190 | nfs4_end_drain_session(clp); |
707fb4b3 TM |
2191 | if (test_and_clear_bit(NFS4CLNT_DELEGRETURN, &clp->cl_state)) { |
2192 | nfs_client_return_marked_delegations(clp); | |
2193 | continue; | |
2194 | } | |
e005e804 TM |
2195 | |
2196 | nfs4_clear_state_manager_bit(clp); | |
f3c76491 TM |
2197 | /* Did we race with an attempt to give us more work? */ |
2198 | if (clp->cl_state == 0) | |
2199 | break; | |
2200 | if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) != 0) | |
2201 | break; | |
47c2199b | 2202 | } while (atomic_read(&clp->cl_count) > 1); |
e005e804 | 2203 | return; |
1da177e4 | 2204 | out_error: |
8ed27d4f WAA |
2205 | if (strlen(section)) |
2206 | section_sep = ": "; | |
2207 | pr_warn_ratelimited("NFS: state manager%s%s failed on NFSv4 server %s" | |
2208 | " with error %d\n", section_sep, section, | |
2209 | clp->cl_hostname, -status); | |
ffe5a830 | 2210 | ssleep(1); |
5601a00d | 2211 | nfs4_end_drain_session(clp); |
e005e804 TM |
2212 | nfs4_clear_state_manager_bit(clp); |
2213 | } | |
2214 | ||
2215 | static int nfs4_run_state_manager(void *ptr) | |
2216 | { | |
2217 | struct nfs_client *clp = ptr; | |
2218 | ||
2219 | allow_signal(SIGKILL); | |
2220 | nfs4_state_manager(clp); | |
2221 | nfs_put_client(clp); | |
2222 | module_put_and_exit(0); | |
2223 | return 0; | |
1da177e4 LT |
2224 | } |
2225 | ||
2226 | /* | |
2227 | * Local variables: | |
2228 | * c-basic-offset: 8 | |
2229 | * End: | |
2230 | */ |