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