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 | 44 | #include <linux/nfs_fs.h> |
5043e900 TM |
45 | #include <linux/kthread.h> |
46 | #include <linux/module.h> | |
9f958ab8 | 47 | #include <linux/random.h> |
8c7597f6 | 48 | #include <linux/ratelimit.h> |
1da177e4 LT |
49 | #include <linux/workqueue.h> |
50 | #include <linux/bitops.h> | |
0aaaf5c4 | 51 | #include <linux/jiffies.h> |
1da177e4 | 52 | |
05f4c350 CL |
53 | #include <linux/sunrpc/clnt.h> |
54 | ||
4ce79717 | 55 | #include "nfs4_fs.h" |
1da177e4 LT |
56 | #include "callback.h" |
57 | #include "delegation.h" | |
24c8dbbb | 58 | #include "internal.h" |
40c64c26 | 59 | #include "nfs4idmap.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 | ||
93b717fd | 68 | const nfs4_stateid zero_stateid = { |
e0714ec4 | 69 | { .data = { 0 } }, |
93b717fd TM |
70 | .type = NFS4_SPECIAL_STATEID_TYPE, |
71 | }; | |
fcd8843c TM |
72 | const nfs4_stateid invalid_stateid = { |
73 | { | |
445f288d TM |
74 | /* Funky initialiser keeps older gcc versions happy */ |
75 | .data = { 0xff, 0xff, 0xff, 0xff, 0 }, | |
fcd8843c TM |
76 | }, |
77 | .type = NFS4_INVALID_STATEID_TYPE, | |
78 | }; | |
79 | ||
05f4c350 | 80 | static DEFINE_MUTEX(nfs_clid_init_mutex); |
1da177e4 | 81 | |
591d71cb | 82 | int nfs4_init_clientid(struct nfs_client *clp, struct rpc_cred *cred) |
1da177e4 | 83 | { |
fd954ae1 TM |
84 | struct nfs4_setclientid_res clid = { |
85 | .clientid = clp->cl_clientid, | |
86 | .confirm = clp->cl_confirm, | |
87 | }; | |
f738f517 CL |
88 | unsigned short port; |
89 | int status; | |
bbe0a3aa | 90 | struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); |
f738f517 | 91 | |
fd954ae1 TM |
92 | if (test_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state)) |
93 | goto do_confirm; | |
bbe0a3aa | 94 | port = nn->nfs_callback_tcpport; |
f738f517 | 95 | if (clp->cl_addr.ss_family == AF_INET6) |
29dcc16a | 96 | port = nn->nfs_callback_tcpport6; |
f738f517 | 97 | |
bb8b27e5 TM |
98 | status = nfs4_proc_setclientid(clp, NFS4_CALLBACK, port, cred, &clid); |
99 | if (status != 0) | |
100 | goto out; | |
fd954ae1 TM |
101 | clp->cl_clientid = clid.clientid; |
102 | clp->cl_confirm = clid.confirm; | |
103 | set_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); | |
104 | do_confirm: | |
bb8b27e5 TM |
105 | status = nfs4_proc_setclientid_confirm(clp, &clid, cred); |
106 | if (status != 0) | |
107 | goto out; | |
fd954ae1 | 108 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
bb8b27e5 TM |
109 | nfs4_schedule_state_renewal(clp); |
110 | out: | |
1da177e4 LT |
111 | return status; |
112 | } | |
113 | ||
05f4c350 CL |
114 | /** |
115 | * nfs40_discover_server_trunking - Detect server IP address trunking (mv0) | |
116 | * | |
117 | * @clp: nfs_client under test | |
118 | * @result: OUT: found nfs_client, or clp | |
119 | * @cred: credential to use for trunking test | |
120 | * | |
121 | * Returns zero, a negative errno, or a negative NFS4ERR status. | |
122 | * If zero is returned, an nfs_client pointer is planted in | |
123 | * "result". | |
124 | * | |
125 | * Note: The returned client may not yet be marked ready. | |
126 | */ | |
127 | int nfs40_discover_server_trunking(struct nfs_client *clp, | |
128 | struct nfs_client **result, | |
129 | struct rpc_cred *cred) | |
130 | { | |
131 | struct nfs4_setclientid_res clid = { | |
132 | .clientid = clp->cl_clientid, | |
133 | .confirm = clp->cl_confirm, | |
134 | }; | |
9f62387d | 135 | struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); |
05f4c350 CL |
136 | unsigned short port; |
137 | int status; | |
138 | ||
9f62387d | 139 | port = nn->nfs_callback_tcpport; |
05f4c350 | 140 | if (clp->cl_addr.ss_family == AF_INET6) |
9f62387d | 141 | port = nn->nfs_callback_tcpport6; |
05f4c350 CL |
142 | |
143 | status = nfs4_proc_setclientid(clp, NFS4_CALLBACK, port, cred, &clid); | |
144 | if (status != 0) | |
145 | goto out; | |
146 | clp->cl_clientid = clid.clientid; | |
147 | clp->cl_confirm = clid.confirm; | |
148 | ||
149 | status = nfs40_walk_client_list(clp, result, cred); | |
202c312d | 150 | if (status == 0) { |
05f4c350 CL |
151 | /* Sustain the lease, even if it's empty. If the clientid4 |
152 | * goes stale it's of no use for trunking discovery. */ | |
153 | nfs4_schedule_state_renewal(*result); | |
05f4c350 | 154 | } |
05f4c350 CL |
155 | out: |
156 | return status; | |
157 | } | |
158 | ||
a7b72103 | 159 | struct rpc_cred *nfs4_get_machine_cred_locked(struct nfs_client *clp) |
a2b2bb88 TM |
160 | { |
161 | struct rpc_cred *cred = NULL; | |
162 | ||
a2b2bb88 TM |
163 | if (clp->cl_machine_cred != NULL) |
164 | cred = get_rpccred(clp->cl_machine_cred); | |
a2b2bb88 TM |
165 | return cred; |
166 | } | |
167 | ||
d688f7b8 CL |
168 | static void nfs4_root_machine_cred(struct nfs_client *clp) |
169 | { | |
170 | struct rpc_cred *cred, *new; | |
171 | ||
172 | new = rpc_lookup_machine_cred(NULL); | |
173 | spin_lock(&clp->cl_lock); | |
174 | cred = clp->cl_machine_cred; | |
175 | clp->cl_machine_cred = new; | |
176 | spin_unlock(&clp->cl_lock); | |
177 | if (cred != NULL) | |
178 | put_rpccred(cred); | |
179 | } | |
180 | ||
24d292b8 CL |
181 | static struct rpc_cred * |
182 | nfs4_get_renew_cred_server_locked(struct nfs_server *server) | |
b4454fe1 | 183 | { |
24d292b8 | 184 | struct rpc_cred *cred = NULL; |
b4454fe1 | 185 | struct nfs4_state_owner *sp; |
9f958ab8 | 186 | struct rb_node *pos; |
b4454fe1 | 187 | |
24d292b8 CL |
188 | for (pos = rb_first(&server->state_owners); |
189 | pos != NULL; | |
190 | pos = rb_next(pos)) { | |
191 | sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); | |
b4454fe1 TM |
192 | if (list_empty(&sp->so_states)) |
193 | continue; | |
194 | cred = get_rpccred(sp->so_cred); | |
195 | break; | |
196 | } | |
197 | return cred; | |
198 | } | |
199 | ||
24d292b8 CL |
200 | /** |
201 | * nfs4_get_renew_cred_locked - Acquire credential for a renew operation | |
202 | * @clp: client state handle | |
203 | * | |
204 | * Returns an rpc_cred with reference count bumped, or NULL. | |
205 | * Caller must hold clp->cl_lock. | |
206 | */ | |
207 | struct rpc_cred *nfs4_get_renew_cred_locked(struct nfs_client *clp) | |
208 | { | |
209 | struct rpc_cred *cred = NULL; | |
210 | struct nfs_server *server; | |
211 | ||
e49a29bd SP |
212 | /* Use machine credentials if available */ |
213 | cred = nfs4_get_machine_cred_locked(clp); | |
214 | if (cred != NULL) | |
215 | goto out; | |
216 | ||
24d292b8 CL |
217 | rcu_read_lock(); |
218 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { | |
219 | cred = nfs4_get_renew_cred_server_locked(server); | |
220 | if (cred != NULL) | |
221 | break; | |
222 | } | |
223 | rcu_read_unlock(); | |
e49a29bd SP |
224 | |
225 | out: | |
24d292b8 CL |
226 | return cred; |
227 | } | |
228 | ||
62f288a0 | 229 | static void nfs4_end_drain_slot_table(struct nfs4_slot_table *tbl) |
9dfdf404 | 230 | { |
774d5f14 | 231 | if (test_and_clear_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state)) { |
961a828d | 232 | spin_lock(&tbl->slot_tbl_lock); |
b75ad4cd | 233 | nfs41_wake_slot_table(tbl); |
961a828d | 234 | spin_unlock(&tbl->slot_tbl_lock); |
689cf5c1 | 235 | } |
9dfdf404 RL |
236 | } |
237 | ||
62f288a0 AA |
238 | static void nfs4_end_drain_session(struct nfs_client *clp) |
239 | { | |
240 | struct nfs4_session *ses = clp->cl_session; | |
241 | ||
2cf8bca8 CL |
242 | if (clp->cl_slot_tbl) { |
243 | nfs4_end_drain_slot_table(clp->cl_slot_tbl); | |
244 | return; | |
245 | } | |
246 | ||
62f288a0 AA |
247 | if (ses != NULL) { |
248 | nfs4_end_drain_slot_table(&ses->bc_slot_table); | |
249 | nfs4_end_drain_slot_table(&ses->fc_slot_table); | |
250 | } | |
251 | } | |
252 | ||
774d5f14 | 253 | static int nfs4_drain_slot_tbl(struct nfs4_slot_table *tbl) |
9dfdf404 | 254 | { |
774d5f14 | 255 | set_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state); |
9dfdf404 | 256 | spin_lock(&tbl->slot_tbl_lock); |
b6bf6e7d | 257 | if (tbl->highest_used_slotid != NFS4_NO_SLOT) { |
16735d02 | 258 | reinit_completion(&tbl->complete); |
9dfdf404 | 259 | spin_unlock(&tbl->slot_tbl_lock); |
42acd021 | 260 | return wait_for_completion_interruptible(&tbl->complete); |
9dfdf404 RL |
261 | } |
262 | spin_unlock(&tbl->slot_tbl_lock); | |
263 | return 0; | |
264 | } | |
265 | ||
42acd021 AA |
266 | static int nfs4_begin_drain_session(struct nfs_client *clp) |
267 | { | |
268 | struct nfs4_session *ses = clp->cl_session; | |
269 | int ret = 0; | |
270 | ||
2cf8bca8 CL |
271 | if (clp->cl_slot_tbl) |
272 | return nfs4_drain_slot_tbl(clp->cl_slot_tbl); | |
273 | ||
42acd021 | 274 | /* back channel */ |
774d5f14 | 275 | ret = nfs4_drain_slot_tbl(&ses->bc_slot_table); |
42acd021 AA |
276 | if (ret) |
277 | return ret; | |
278 | /* fore channel */ | |
774d5f14 | 279 | return nfs4_drain_slot_tbl(&ses->fc_slot_table); |
42acd021 AA |
280 | } |
281 | ||
c9fdeb28 CL |
282 | #if defined(CONFIG_NFS_V4_1) |
283 | ||
2cf8bca8 CL |
284 | static int nfs41_setup_state_renewal(struct nfs_client *clp) |
285 | { | |
286 | int status; | |
287 | struct nfs_fsinfo fsinfo; | |
fb10fb67 | 288 | unsigned long now; |
2cf8bca8 CL |
289 | |
290 | if (!test_bit(NFS_CS_CHECK_LEASE_TIME, &clp->cl_res_state)) { | |
291 | nfs4_schedule_state_renewal(clp); | |
292 | return 0; | |
293 | } | |
294 | ||
fb10fb67 | 295 | now = jiffies; |
2cf8bca8 CL |
296 | status = nfs4_proc_get_lease_time(clp, &fsinfo); |
297 | if (status == 0) { | |
fb10fb67 | 298 | nfs4_set_lease_period(clp, fsinfo.lease_time * HZ, now); |
2cf8bca8 CL |
299 | nfs4_schedule_state_renewal(clp); |
300 | } | |
301 | ||
302 | return status; | |
303 | } | |
304 | ||
bda197f5 TM |
305 | static void nfs41_finish_session_reset(struct nfs_client *clp) |
306 | { | |
307 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); | |
308 | clear_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); | |
309 | /* create_session negotiated new slot table */ | |
bda197f5 TM |
310 | clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); |
311 | nfs41_setup_state_renewal(clp); | |
312 | } | |
313 | ||
4d643d1d AA |
314 | int nfs41_init_clientid(struct nfs_client *clp, struct rpc_cred *cred) |
315 | { | |
316 | int status; | |
317 | ||
fd954ae1 TM |
318 | if (test_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state)) |
319 | goto do_confirm; | |
4d643d1d | 320 | status = nfs4_proc_exchange_id(clp, cred); |
9430fb6b RL |
321 | if (status != 0) |
322 | goto out; | |
fd954ae1 TM |
323 | set_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
324 | do_confirm: | |
848f5bda | 325 | status = nfs4_proc_create_session(clp, cred); |
9430fb6b RL |
326 | if (status != 0) |
327 | goto out; | |
bda197f5 | 328 | nfs41_finish_session_reset(clp); |
9430fb6b RL |
329 | nfs_mark_client_ready(clp, NFS_CS_READY); |
330 | out: | |
4d643d1d AA |
331 | return status; |
332 | } | |
333 | ||
05f4c350 CL |
334 | /** |
335 | * nfs41_discover_server_trunking - Detect server IP address trunking (mv1) | |
336 | * | |
337 | * @clp: nfs_client under test | |
338 | * @result: OUT: found nfs_client, or clp | |
339 | * @cred: credential to use for trunking test | |
340 | * | |
341 | * Returns NFS4_OK, a negative errno, or a negative NFS4ERR status. | |
342 | * If NFS4_OK is returned, an nfs_client pointer is planted in | |
343 | * "result". | |
344 | * | |
345 | * Note: The returned client may not yet be marked ready. | |
346 | */ | |
347 | int nfs41_discover_server_trunking(struct nfs_client *clp, | |
348 | struct nfs_client **result, | |
349 | struct rpc_cred *cred) | |
350 | { | |
351 | int status; | |
352 | ||
353 | status = nfs4_proc_exchange_id(clp, cred); | |
354 | if (status != NFS4_OK) | |
355 | return status; | |
356 | ||
48d66b97 TM |
357 | status = nfs41_walk_client_list(clp, result, cred); |
358 | if (status < 0) | |
359 | return status; | |
360 | if (clp != *result) | |
361 | return 0; | |
362 | ||
8dcbec6d CL |
363 | /* |
364 | * Purge state if the client id was established in a prior | |
365 | * instance and the client id could not have arrived on the | |
366 | * server via Transparent State Migration. | |
367 | */ | |
368 | if (clp->cl_exchange_flags & EXCHGID4_FLAG_CONFIRMED_R) { | |
369 | if (!test_bit(NFS_CS_TSM_POSSIBLE, &clp->cl_flags)) | |
370 | set_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state); | |
371 | else | |
372 | set_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); | |
373 | } | |
48d66b97 TM |
374 | nfs4_schedule_state_manager(clp); |
375 | status = nfs_wait_client_init_complete(clp); | |
376 | if (status < 0) | |
377 | nfs_put_client(clp); | |
378 | return status; | |
05f4c350 CL |
379 | } |
380 | ||
b4b82607 AA |
381 | #endif /* CONFIG_NFS_V4_1 */ |
382 | ||
24d292b8 | 383 | /** |
73d8bde5 | 384 | * nfs4_get_clid_cred - Acquire credential for a setclientid operation |
24d292b8 CL |
385 | * @clp: client state handle |
386 | * | |
387 | * Returns an rpc_cred with reference count bumped, or NULL. | |
388 | */ | |
73d8bde5 | 389 | struct rpc_cred *nfs4_get_clid_cred(struct nfs_client *clp) |
24d292b8 | 390 | { |
a2b2bb88 | 391 | struct rpc_cred *cred; |
286d7d6a | 392 | |
6dc9d57a TM |
393 | spin_lock(&clp->cl_lock); |
394 | cred = nfs4_get_machine_cred_locked(clp); | |
24d292b8 | 395 | spin_unlock(&clp->cl_lock); |
a2b2bb88 | 396 | return cred; |
286d7d6a TM |
397 | } |
398 | ||
1da177e4 | 399 | static struct nfs4_state_owner * |
24d292b8 | 400 | nfs4_find_state_owner_locked(struct nfs_server *server, struct rpc_cred *cred) |
1da177e4 | 401 | { |
24d292b8 | 402 | struct rb_node **p = &server->state_owners.rb_node, |
9f958ab8 | 403 | *parent = NULL; |
414adf14 | 404 | struct nfs4_state_owner *sp; |
1da177e4 | 405 | |
9f958ab8 TM |
406 | while (*p != NULL) { |
407 | parent = *p; | |
24d292b8 | 408 | sp = rb_entry(parent, struct nfs4_state_owner, so_server_node); |
9f958ab8 TM |
409 | |
410 | if (cred < sp->so_cred) | |
411 | p = &parent->rb_left; | |
412 | else if (cred > sp->so_cred) | |
413 | p = &parent->rb_right; | |
414 | else { | |
0aaaf5c4 CL |
415 | if (!list_empty(&sp->so_lru)) |
416 | list_del_init(&sp->so_lru); | |
9f958ab8 | 417 | atomic_inc(&sp->so_count); |
414adf14 | 418 | return sp; |
9f958ab8 | 419 | } |
1da177e4 | 420 | } |
414adf14 | 421 | return NULL; |
1da177e4 LT |
422 | } |
423 | ||
9f958ab8 | 424 | static struct nfs4_state_owner * |
24d292b8 | 425 | nfs4_insert_state_owner_locked(struct nfs4_state_owner *new) |
9f958ab8 | 426 | { |
24d292b8 CL |
427 | struct nfs_server *server = new->so_server; |
428 | struct rb_node **p = &server->state_owners.rb_node, | |
9f958ab8 TM |
429 | *parent = NULL; |
430 | struct nfs4_state_owner *sp; | |
431 | ||
432 | while (*p != NULL) { | |
433 | parent = *p; | |
24d292b8 | 434 | sp = rb_entry(parent, struct nfs4_state_owner, so_server_node); |
9f958ab8 TM |
435 | |
436 | if (new->so_cred < sp->so_cred) | |
437 | p = &parent->rb_left; | |
438 | else if (new->so_cred > sp->so_cred) | |
439 | p = &parent->rb_right; | |
440 | else { | |
0aaaf5c4 CL |
441 | if (!list_empty(&sp->so_lru)) |
442 | list_del_init(&sp->so_lru); | |
9f958ab8 TM |
443 | atomic_inc(&sp->so_count); |
444 | return sp; | |
445 | } | |
446 | } | |
24d292b8 CL |
447 | rb_link_node(&new->so_server_node, parent, p); |
448 | rb_insert_color(&new->so_server_node, &server->state_owners); | |
9f958ab8 TM |
449 | return new; |
450 | } | |
451 | ||
452 | static void | |
24d292b8 | 453 | nfs4_remove_state_owner_locked(struct nfs4_state_owner *sp) |
9f958ab8 | 454 | { |
24d292b8 CL |
455 | struct nfs_server *server = sp->so_server; |
456 | ||
457 | if (!RB_EMPTY_NODE(&sp->so_server_node)) | |
458 | rb_erase(&sp->so_server_node, &server->state_owners); | |
9f958ab8 TM |
459 | } |
460 | ||
7ba127ab TM |
461 | static void |
462 | nfs4_init_seqid_counter(struct nfs_seqid_counter *sc) | |
463 | { | |
95b72eb0 | 464 | sc->create_time = ktime_get(); |
7ba127ab TM |
465 | sc->flags = 0; |
466 | sc->counter = 0; | |
467 | spin_lock_init(&sc->lock); | |
468 | INIT_LIST_HEAD(&sc->list); | |
469 | rpc_init_wait_queue(&sc->wait, "Seqid_waitqueue"); | |
470 | } | |
471 | ||
472 | static void | |
473 | nfs4_destroy_seqid_counter(struct nfs_seqid_counter *sc) | |
474 | { | |
475 | rpc_destroy_wait_queue(&sc->wait); | |
476 | } | |
477 | ||
1da177e4 LT |
478 | /* |
479 | * nfs4_alloc_state_owner(): this is called on the OPEN or CREATE path to | |
480 | * create a new state_owner. | |
481 | * | |
482 | */ | |
483 | static struct nfs4_state_owner * | |
d1e284d5 TM |
484 | nfs4_alloc_state_owner(struct nfs_server *server, |
485 | struct rpc_cred *cred, | |
486 | gfp_t gfp_flags) | |
1da177e4 LT |
487 | { |
488 | struct nfs4_state_owner *sp; | |
489 | ||
d1e284d5 | 490 | sp = kzalloc(sizeof(*sp), gfp_flags); |
1da177e4 LT |
491 | if (!sp) |
492 | return NULL; | |
aae5730e MW |
493 | sp->so_seqid.owner_id = ida_simple_get(&server->openowner_id, 0, 0, |
494 | gfp_flags); | |
495 | if (sp->so_seqid.owner_id < 0) { | |
496 | kfree(sp); | |
497 | return NULL; | |
498 | } | |
d1e284d5 TM |
499 | sp->so_server = server; |
500 | sp->so_cred = get_rpccred(cred); | |
ec073428 | 501 | spin_lock_init(&sp->so_lock); |
1da177e4 | 502 | INIT_LIST_HEAD(&sp->so_states); |
7ba127ab | 503 | nfs4_init_seqid_counter(&sp->so_seqid); |
1da177e4 | 504 | atomic_set(&sp->so_count, 1); |
0aaaf5c4 | 505 | INIT_LIST_HEAD(&sp->so_lru); |
c137afab | 506 | seqcount_init(&sp->so_reclaim_seqcount); |
65b62a29 | 507 | mutex_init(&sp->so_delegreturn_mutex); |
1da177e4 LT |
508 | return sp; |
509 | } | |
510 | ||
1d2e88e7 | 511 | static void |
86cfb041 | 512 | nfs4_reset_state_owner(struct nfs4_state_owner *sp) |
1da177e4 | 513 | { |
86cfb041 N |
514 | /* This state_owner is no longer usable, but must |
515 | * remain in place so that state recovery can find it | |
516 | * and the opens associated with it. | |
517 | * It may also be used for new 'open' request to | |
518 | * return a delegation to the server. | |
519 | * So update the 'create_time' so that it looks like | |
520 | * a new state_owner. This will cause the server to | |
521 | * request an OPEN_CONFIRM to start a new sequence. | |
522 | */ | |
523 | sp->so_seqid.create_time = ktime_get(); | |
1da177e4 LT |
524 | } |
525 | ||
0aaaf5c4 CL |
526 | static void nfs4_free_state_owner(struct nfs4_state_owner *sp) |
527 | { | |
7ba127ab | 528 | nfs4_destroy_seqid_counter(&sp->so_seqid); |
0aaaf5c4 | 529 | put_rpccred(sp->so_cred); |
aae5730e | 530 | ida_simple_remove(&sp->so_server->openowner_id, sp->so_seqid.owner_id); |
0aaaf5c4 CL |
531 | kfree(sp); |
532 | } | |
533 | ||
534 | static void nfs4_gc_state_owners(struct nfs_server *server) | |
535 | { | |
536 | struct nfs_client *clp = server->nfs_client; | |
537 | struct nfs4_state_owner *sp, *tmp; | |
538 | unsigned long time_min, time_max; | |
539 | LIST_HEAD(doomed); | |
540 | ||
541 | spin_lock(&clp->cl_lock); | |
542 | time_max = jiffies; | |
543 | time_min = (long)time_max - (long)clp->cl_lease_time; | |
544 | list_for_each_entry_safe(sp, tmp, &server->state_owners_lru, so_lru) { | |
545 | /* NB: LRU is sorted so that oldest is at the head */ | |
546 | if (time_in_range(sp->so_expires, time_min, time_max)) | |
547 | break; | |
548 | list_move(&sp->so_lru, &doomed); | |
549 | nfs4_remove_state_owner_locked(sp); | |
550 | } | |
551 | spin_unlock(&clp->cl_lock); | |
552 | ||
553 | list_for_each_entry_safe(sp, tmp, &doomed, so_lru) { | |
554 | list_del(&sp->so_lru); | |
555 | nfs4_free_state_owner(sp); | |
556 | } | |
557 | } | |
558 | ||
24d292b8 CL |
559 | /** |
560 | * nfs4_get_state_owner - Look up a state owner given a credential | |
561 | * @server: nfs_server to search | |
562 | * @cred: RPC credential to match | |
563 | * | |
564 | * Returns a pointer to an instantiated nfs4_state_owner struct, or NULL. | |
565 | */ | |
566 | struct nfs4_state_owner *nfs4_get_state_owner(struct nfs_server *server, | |
d1e284d5 TM |
567 | struct rpc_cred *cred, |
568 | gfp_t gfp_flags) | |
1da177e4 | 569 | { |
7539bbab | 570 | struct nfs_client *clp = server->nfs_client; |
1da177e4 LT |
571 | struct nfs4_state_owner *sp, *new; |
572 | ||
1da177e4 | 573 | spin_lock(&clp->cl_lock); |
24d292b8 | 574 | sp = nfs4_find_state_owner_locked(server, cred); |
1da177e4 | 575 | spin_unlock(&clp->cl_lock); |
1da177e4 | 576 | if (sp != NULL) |
0aaaf5c4 | 577 | goto out; |
d1e284d5 | 578 | new = nfs4_alloc_state_owner(server, cred, gfp_flags); |
9f958ab8 | 579 | if (new == NULL) |
0aaaf5c4 | 580 | goto out; |
aae5730e MW |
581 | spin_lock(&clp->cl_lock); |
582 | sp = nfs4_insert_state_owner_locked(new); | |
583 | spin_unlock(&clp->cl_lock); | |
d1e284d5 TM |
584 | if (sp != new) |
585 | nfs4_free_state_owner(new); | |
0aaaf5c4 CL |
586 | out: |
587 | nfs4_gc_state_owners(server); | |
9f958ab8 | 588 | return sp; |
1da177e4 LT |
589 | } |
590 | ||
24d292b8 CL |
591 | /** |
592 | * nfs4_put_state_owner - Release a nfs4_state_owner | |
593 | * @sp: state owner data to release | |
7bf97bc2 TM |
594 | * |
595 | * Note that we keep released state owners on an LRU | |
596 | * list. | |
597 | * This caches valid state owners so that they can be | |
598 | * reused, to avoid the OPEN_CONFIRM on minor version 0. | |
599 | * It also pins the uniquifier of dropped state owners for | |
600 | * a while, to ensure that those state owner names are | |
601 | * never reused. | |
24d292b8 | 602 | */ |
1da177e4 LT |
603 | void nfs4_put_state_owner(struct nfs4_state_owner *sp) |
604 | { | |
0aaaf5c4 CL |
605 | struct nfs_server *server = sp->so_server; |
606 | struct nfs_client *clp = server->nfs_client; | |
1da177e4 LT |
607 | |
608 | if (!atomic_dec_and_lock(&sp->so_count, &clp->cl_lock)) | |
609 | return; | |
0aaaf5c4 | 610 | |
7bf97bc2 TM |
611 | sp->so_expires = jiffies; |
612 | list_add_tail(&sp->so_lru, &server->state_owners_lru); | |
613 | spin_unlock(&clp->cl_lock); | |
0aaaf5c4 CL |
614 | } |
615 | ||
616 | /** | |
617 | * nfs4_purge_state_owners - Release all cached state owners | |
618 | * @server: nfs_server with cached state owners to release | |
619 | * | |
620 | * Called at umount time. Remaining state owners will be on | |
621 | * the LRU with ref count of zero. | |
622 | */ | |
623 | void nfs4_purge_state_owners(struct nfs_server *server) | |
624 | { | |
625 | struct nfs_client *clp = server->nfs_client; | |
626 | struct nfs4_state_owner *sp, *tmp; | |
627 | LIST_HEAD(doomed); | |
628 | ||
629 | spin_lock(&clp->cl_lock); | |
630 | list_for_each_entry_safe(sp, tmp, &server->state_owners_lru, so_lru) { | |
631 | list_move(&sp->so_lru, &doomed); | |
632 | nfs4_remove_state_owner_locked(sp); | |
633 | } | |
1da177e4 | 634 | spin_unlock(&clp->cl_lock); |
0aaaf5c4 CL |
635 | |
636 | list_for_each_entry_safe(sp, tmp, &doomed, so_lru) { | |
637 | list_del(&sp->so_lru); | |
638 | nfs4_free_state_owner(sp); | |
639 | } | |
1da177e4 LT |
640 | } |
641 | ||
642 | static struct nfs4_state * | |
643 | nfs4_alloc_open_state(void) | |
644 | { | |
645 | struct nfs4_state *state; | |
646 | ||
8535b2be | 647 | state = kzalloc(sizeof(*state), GFP_NOFS); |
1da177e4 LT |
648 | if (!state) |
649 | return NULL; | |
1da177e4 LT |
650 | atomic_set(&state->count, 1); |
651 | INIT_LIST_HEAD(&state->lock_states); | |
8d0a8a9d | 652 | spin_lock_init(&state->state_lock); |
8bda4e4c | 653 | seqlock_init(&state->seqlock); |
c9399f21 | 654 | init_waitqueue_head(&state->waitq); |
1da177e4 LT |
655 | return state; |
656 | } | |
657 | ||
4cecb76f | 658 | void |
dc0b027d | 659 | nfs4_state_set_mode_locked(struct nfs4_state *state, fmode_t fmode) |
4cecb76f | 660 | { |
dc0b027d | 661 | if (state->state == fmode) |
4cecb76f TM |
662 | return; |
663 | /* NB! List reordering - see the reclaim code for why. */ | |
dc0b027d TM |
664 | if ((fmode & FMODE_WRITE) != (state->state & FMODE_WRITE)) { |
665 | if (fmode & FMODE_WRITE) | |
4cecb76f TM |
666 | list_move(&state->open_states, &state->owner->so_states); |
667 | else | |
668 | list_move_tail(&state->open_states, &state->owner->so_states); | |
669 | } | |
dc0b027d | 670 | state->state = fmode; |
4cecb76f TM |
671 | } |
672 | ||
1da177e4 LT |
673 | static struct nfs4_state * |
674 | __nfs4_find_state_byowner(struct inode *inode, struct nfs4_state_owner *owner) | |
675 | { | |
676 | struct nfs_inode *nfsi = NFS_I(inode); | |
677 | struct nfs4_state *state; | |
678 | ||
679 | list_for_each_entry(state, &nfsi->open_states, inode_states) { | |
1c816efa | 680 | if (state->owner != owner) |
1da177e4 | 681 | continue; |
5d422301 TM |
682 | if (!nfs4_valid_open_stateid(state)) |
683 | continue; | |
1c816efa | 684 | if (atomic_inc_not_zero(&state->count)) |
1da177e4 | 685 | return state; |
1da177e4 LT |
686 | } |
687 | return NULL; | |
688 | } | |
689 | ||
1da177e4 LT |
690 | static void |
691 | nfs4_free_open_state(struct nfs4_state *state) | |
692 | { | |
693 | kfree(state); | |
694 | } | |
695 | ||
696 | struct nfs4_state * | |
697 | nfs4_get_open_state(struct inode *inode, struct nfs4_state_owner *owner) | |
698 | { | |
699 | struct nfs4_state *state, *new; | |
700 | struct nfs_inode *nfsi = NFS_I(inode); | |
701 | ||
702 | spin_lock(&inode->i_lock); | |
703 | state = __nfs4_find_state_byowner(inode, owner); | |
704 | spin_unlock(&inode->i_lock); | |
705 | if (state) | |
706 | goto out; | |
707 | new = nfs4_alloc_open_state(); | |
ec073428 | 708 | spin_lock(&owner->so_lock); |
1da177e4 LT |
709 | spin_lock(&inode->i_lock); |
710 | state = __nfs4_find_state_byowner(inode, owner); | |
711 | if (state == NULL && new != NULL) { | |
712 | state = new; | |
1da177e4 LT |
713 | state->owner = owner; |
714 | atomic_inc(&owner->so_count); | |
715 | list_add(&state->inode_states, &nfsi->open_states); | |
0444d76a DC |
716 | ihold(inode); |
717 | state->inode = inode; | |
1da177e4 | 718 | spin_unlock(&inode->i_lock); |
ec073428 TM |
719 | /* Note: The reclaim code dictates that we add stateless |
720 | * and read-only stateids to the end of the list */ | |
721 | list_add_tail(&state->open_states, &owner->so_states); | |
722 | spin_unlock(&owner->so_lock); | |
1da177e4 LT |
723 | } else { |
724 | spin_unlock(&inode->i_lock); | |
ec073428 | 725 | spin_unlock(&owner->so_lock); |
1da177e4 LT |
726 | if (new) |
727 | nfs4_free_open_state(new); | |
728 | } | |
729 | out: | |
730 | return state; | |
731 | } | |
732 | ||
1da177e4 LT |
733 | void nfs4_put_open_state(struct nfs4_state *state) |
734 | { | |
735 | struct inode *inode = state->inode; | |
736 | struct nfs4_state_owner *owner = state->owner; | |
737 | ||
ec073428 | 738 | if (!atomic_dec_and_lock(&state->count, &owner->so_lock)) |
1da177e4 | 739 | return; |
ec073428 | 740 | spin_lock(&inode->i_lock); |
ba683031 | 741 | list_del(&state->inode_states); |
1da177e4 | 742 | list_del(&state->open_states); |
ec073428 TM |
743 | spin_unlock(&inode->i_lock); |
744 | spin_unlock(&owner->so_lock); | |
1da177e4 | 745 | iput(inode); |
1da177e4 LT |
746 | nfs4_free_open_state(state); |
747 | nfs4_put_state_owner(owner); | |
748 | } | |
749 | ||
750 | /* | |
83c9d41e | 751 | * Close the current file. |
1da177e4 | 752 | */ |
643168c2 | 753 | static void __nfs4_close(struct nfs4_state *state, |
8535b2be | 754 | fmode_t fmode, gfp_t gfp_mask, int wait) |
1da177e4 | 755 | { |
1da177e4 | 756 | struct nfs4_state_owner *owner = state->owner; |
003707c7 | 757 | int call_close = 0; |
dc0b027d | 758 | fmode_t newstate; |
1da177e4 LT |
759 | |
760 | atomic_inc(&owner->so_count); | |
1da177e4 | 761 | /* Protect against nfs4_find_state() */ |
ec073428 | 762 | spin_lock(&owner->so_lock); |
dc0b027d | 763 | switch (fmode & (FMODE_READ | FMODE_WRITE)) { |
e7616923 TM |
764 | case FMODE_READ: |
765 | state->n_rdonly--; | |
766 | break; | |
767 | case FMODE_WRITE: | |
768 | state->n_wronly--; | |
769 | break; | |
770 | case FMODE_READ|FMODE_WRITE: | |
771 | state->n_rdwr--; | |
772 | } | |
003707c7 | 773 | newstate = FMODE_READ|FMODE_WRITE; |
e7616923 | 774 | if (state->n_rdwr == 0) { |
003707c7 | 775 | if (state->n_rdonly == 0) { |
e7616923 | 776 | newstate &= ~FMODE_READ; |
003707c7 TM |
777 | call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags); |
778 | call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); | |
779 | } | |
780 | if (state->n_wronly == 0) { | |
e7616923 | 781 | newstate &= ~FMODE_WRITE; |
003707c7 TM |
782 | call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags); |
783 | call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); | |
784 | } | |
785 | if (newstate == 0) | |
786 | clear_bit(NFS_DELEGATED_STATE, &state->flags); | |
e7616923 | 787 | } |
003707c7 | 788 | nfs4_state_set_mode_locked(state, newstate); |
ec073428 | 789 | spin_unlock(&owner->so_lock); |
4cecb76f | 790 | |
003707c7 | 791 | if (!call_close) { |
b39e625b TM |
792 | nfs4_put_open_state(state); |
793 | nfs4_put_state_owner(owner); | |
1f7977c1 TM |
794 | } else |
795 | nfs4_do_close(state, gfp_mask, wait); | |
a49c3c77 TM |
796 | } |
797 | ||
643168c2 | 798 | void nfs4_close_state(struct nfs4_state *state, fmode_t fmode) |
a49c3c77 | 799 | { |
643168c2 | 800 | __nfs4_close(state, fmode, GFP_NOFS, 0); |
a49c3c77 TM |
801 | } |
802 | ||
643168c2 | 803 | void nfs4_close_sync(struct nfs4_state *state, fmode_t fmode) |
a49c3c77 | 804 | { |
643168c2 | 805 | __nfs4_close(state, fmode, GFP_KERNEL, 1); |
1da177e4 LT |
806 | } |
807 | ||
808 | /* | |
809 | * Search the state->lock_states for an existing lock_owner | |
3f8f2548 N |
810 | * that is compatible with either of the given owners. |
811 | * If the second is non-zero, then the first refers to a Posix-lock | |
812 | * owner (current->files) and the second refers to a flock/OFD | |
813 | * owner (struct file*). In that case, prefer a match for the first | |
814 | * owner. | |
815 | * If both sorts of locks are held on the one file we cannot know | |
816 | * which stateid was intended to be used, so a "correct" choice cannot | |
817 | * be made. Failing that, a "consistent" choice is preferable. The | |
818 | * consistent choice we make is to prefer the first owner, that of a | |
819 | * Posix lock. | |
1da177e4 LT |
820 | */ |
821 | static struct nfs4_lock_state * | |
8d424431 N |
822 | __nfs4_find_lock_state(struct nfs4_state *state, |
823 | fl_owner_t fl_owner, fl_owner_t fl_owner2) | |
1da177e4 | 824 | { |
3f8f2548 | 825 | struct nfs4_lock_state *pos, *ret = NULL; |
1da177e4 | 826 | list_for_each_entry(pos, &state->lock_states, ls_locks) { |
3f8f2548 N |
827 | if (pos->ls_owner == fl_owner) { |
828 | ret = pos; | |
829 | break; | |
830 | } | |
831 | if (pos->ls_owner == fl_owner2) | |
832 | ret = pos; | |
1da177e4 | 833 | } |
3f8f2548 | 834 | if (ret) |
194bc1f4 | 835 | refcount_inc(&ret->ls_count); |
3f8f2548 | 836 | return ret; |
1da177e4 LT |
837 | } |
838 | ||
1da177e4 LT |
839 | /* |
840 | * Return a compatible lock_state. If no initialized lock_state structure | |
841 | * exists, return an uninitialized one. | |
842 | * | |
1da177e4 | 843 | */ |
8003d3c4 | 844 | static struct nfs4_lock_state *nfs4_alloc_lock_state(struct nfs4_state *state, fl_owner_t fl_owner) |
1da177e4 LT |
845 | { |
846 | struct nfs4_lock_state *lsp; | |
24d292b8 | 847 | struct nfs_server *server = state->owner->so_server; |
1da177e4 | 848 | |
8535b2be | 849 | lsp = kzalloc(sizeof(*lsp), GFP_NOFS); |
1da177e4 LT |
850 | if (lsp == NULL) |
851 | return NULL; | |
7ba127ab | 852 | nfs4_init_seqid_counter(&lsp->ls_seqid); |
194bc1f4 | 853 | refcount_set(&lsp->ls_count, 1); |
b64aec8d | 854 | lsp->ls_state = state; |
8003d3c4 | 855 | lsp->ls_owner = fl_owner; |
48c22eb2 TM |
856 | lsp->ls_seqid.owner_id = ida_simple_get(&server->lockowner_id, 0, 0, GFP_NOFS); |
857 | if (lsp->ls_seqid.owner_id < 0) | |
d2d7ce28 | 858 | goto out_free; |
8d0a8a9d | 859 | INIT_LIST_HEAD(&lsp->ls_locks); |
1da177e4 | 860 | return lsp; |
d2d7ce28 TM |
861 | out_free: |
862 | kfree(lsp); | |
863 | return NULL; | |
1da177e4 LT |
864 | } |
865 | ||
5ae67c4f | 866 | void nfs4_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp) |
9f958ab8 | 867 | { |
48c22eb2 | 868 | ida_simple_remove(&server->lockowner_id, lsp->ls_seqid.owner_id); |
7ba127ab | 869 | nfs4_destroy_seqid_counter(&lsp->ls_seqid); |
9f958ab8 TM |
870 | kfree(lsp); |
871 | } | |
872 | ||
1da177e4 LT |
873 | /* |
874 | * Return a compatible lock_state. If no initialized lock_state structure | |
875 | * exists, return an uninitialized one. | |
876 | * | |
1da177e4 | 877 | */ |
8003d3c4 | 878 | static struct nfs4_lock_state *nfs4_get_lock_state(struct nfs4_state *state, fl_owner_t owner) |
1da177e4 | 879 | { |
8d0a8a9d | 880 | struct nfs4_lock_state *lsp, *new = NULL; |
1da177e4 | 881 | |
8d0a8a9d TM |
882 | for(;;) { |
883 | spin_lock(&state->state_lock); | |
68e33bd6 | 884 | lsp = __nfs4_find_lock_state(state, owner, NULL); |
8d0a8a9d TM |
885 | if (lsp != NULL) |
886 | break; | |
887 | if (new != NULL) { | |
8d0a8a9d TM |
888 | list_add(&new->ls_locks, &state->lock_states); |
889 | set_bit(LK_STATE_IN_USE, &state->flags); | |
890 | lsp = new; | |
891 | new = NULL; | |
892 | break; | |
893 | } | |
894 | spin_unlock(&state->state_lock); | |
8003d3c4 | 895 | new = nfs4_alloc_lock_state(state, owner); |
8d0a8a9d TM |
896 | if (new == NULL) |
897 | return NULL; | |
898 | } | |
899 | spin_unlock(&state->state_lock); | |
9f958ab8 | 900 | if (new != NULL) |
5ae67c4f | 901 | nfs4_free_lock_state(state->owner->so_server, new); |
1da177e4 LT |
902 | return lsp; |
903 | } | |
904 | ||
905 | /* | |
8d0a8a9d TM |
906 | * Release reference to lock_state, and free it if we see that |
907 | * it is no longer in use | |
1da177e4 | 908 | */ |
faf5f49c | 909 | void nfs4_put_lock_state(struct nfs4_lock_state *lsp) |
1da177e4 | 910 | { |
c8b2d0bf | 911 | struct nfs_server *server; |
8d0a8a9d | 912 | struct nfs4_state *state; |
1da177e4 | 913 | |
8d0a8a9d TM |
914 | if (lsp == NULL) |
915 | return; | |
916 | state = lsp->ls_state; | |
194bc1f4 | 917 | if (!refcount_dec_and_lock(&lsp->ls_count, &state->state_lock)) |
8d0a8a9d TM |
918 | return; |
919 | list_del(&lsp->ls_locks); | |
920 | if (list_empty(&state->lock_states)) | |
921 | clear_bit(LK_STATE_IN_USE, &state->flags); | |
922 | spin_unlock(&state->state_lock); | |
0c0e0d3c JL |
923 | server = state->owner->so_server; |
924 | if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) { | |
925 | struct nfs_client *clp = server->nfs_client; | |
926 | ||
927 | clp->cl_mvops->free_lock_state(server, lsp); | |
928 | } else | |
c8b2d0bf | 929 | nfs4_free_lock_state(server, lsp); |
1da177e4 LT |
930 | } |
931 | ||
8d0a8a9d | 932 | static void nfs4_fl_copy_lock(struct file_lock *dst, struct file_lock *src) |
1da177e4 | 933 | { |
8d0a8a9d | 934 | struct nfs4_lock_state *lsp = src->fl_u.nfs4_fl.owner; |
1da177e4 | 935 | |
8d0a8a9d | 936 | dst->fl_u.nfs4_fl.owner = lsp; |
194bc1f4 | 937 | refcount_inc(&lsp->ls_count); |
8d0a8a9d | 938 | } |
1da177e4 | 939 | |
8d0a8a9d | 940 | static void nfs4_fl_release_lock(struct file_lock *fl) |
1da177e4 | 941 | { |
8d0a8a9d | 942 | nfs4_put_lock_state(fl->fl_u.nfs4_fl.owner); |
1da177e4 LT |
943 | } |
944 | ||
6aed6285 | 945 | static const struct file_lock_operations nfs4_fl_lock_ops = { |
8d0a8a9d TM |
946 | .fl_copy_lock = nfs4_fl_copy_lock, |
947 | .fl_release_private = nfs4_fl_release_lock, | |
948 | }; | |
949 | ||
950 | int nfs4_set_lock_state(struct nfs4_state *state, struct file_lock *fl) | |
1da177e4 | 951 | { |
8d0a8a9d TM |
952 | struct nfs4_lock_state *lsp; |
953 | ||
954 | if (fl->fl_ops != NULL) | |
955 | return 0; | |
8003d3c4 | 956 | lsp = nfs4_get_lock_state(state, fl->fl_owner); |
8d0a8a9d TM |
957 | if (lsp == NULL) |
958 | return -ENOMEM; | |
959 | fl->fl_u.nfs4_fl.owner = lsp; | |
960 | fl->fl_ops = &nfs4_fl_lock_ops; | |
961 | return 0; | |
1da177e4 LT |
962 | } |
963 | ||
5521abfd TM |
964 | static int nfs4_copy_lock_stateid(nfs4_stateid *dst, |
965 | struct nfs4_state *state, | |
17393475 | 966 | const struct nfs_lock_context *l_ctx) |
1da177e4 | 967 | { |
8d0a8a9d | 968 | struct nfs4_lock_state *lsp; |
8d424431 | 969 | fl_owner_t fl_owner, fl_flock_owner; |
5521abfd | 970 | int ret = -ENOENT; |
1da177e4 | 971 | |
17393475 | 972 | if (l_ctx == NULL) |
2a369153 TM |
973 | goto out; |
974 | ||
8d0a8a9d | 975 | if (test_bit(LK_STATE_IN_USE, &state->flags) == 0) |
4fc8796d | 976 | goto out; |
1da177e4 | 977 | |
d51fdb87 | 978 | fl_owner = l_ctx->lockowner; |
8d424431 N |
979 | fl_flock_owner = l_ctx->open_context->flock_owner; |
980 | ||
8d0a8a9d | 981 | spin_lock(&state->state_lock); |
8d424431 | 982 | lsp = __nfs4_find_lock_state(state, fl_owner, fl_flock_owner); |
ef1820f9 N |
983 | if (lsp && test_bit(NFS_LOCK_LOST, &lsp->ls_flags)) |
984 | ret = -EIO; | |
985 | else if (lsp != NULL && test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0) { | |
f597c537 | 986 | nfs4_stateid_copy(dst, &lsp->ls_stateid); |
5521abfd | 987 | ret = 0; |
4fc8796d | 988 | } |
8d0a8a9d | 989 | spin_unlock(&state->state_lock); |
1da177e4 | 990 | nfs4_put_lock_state(lsp); |
4fc8796d TM |
991 | out: |
992 | return ret; | |
993 | } | |
994 | ||
12f275cd TM |
995 | bool nfs4_refresh_open_stateid(nfs4_stateid *dst, struct nfs4_state *state) |
996 | { | |
997 | bool ret; | |
998 | int seq; | |
999 | ||
1000 | do { | |
1001 | ret = false; | |
1002 | seq = read_seqbegin(&state->seqlock); | |
1003 | if (nfs4_state_match_open_stateid_other(state, dst)) { | |
1004 | dst->seqid = state->open_stateid.seqid; | |
1005 | ret = true; | |
1006 | } | |
1007 | } while (read_seqretry(&state->seqlock, seq)); | |
1008 | return ret; | |
1009 | } | |
1010 | ||
c82bac6f | 1011 | bool nfs4_copy_open_stateid(nfs4_stateid *dst, struct nfs4_state *state) |
4fc8796d | 1012 | { |
c82bac6f | 1013 | bool ret; |
92b40e93 | 1014 | const nfs4_stateid *src; |
4fc8796d TM |
1015 | int seq; |
1016 | ||
1017 | do { | |
c82bac6f | 1018 | ret = false; |
92b40e93 | 1019 | src = &zero_stateid; |
4fc8796d | 1020 | seq = read_seqbegin(&state->seqlock); |
c82bac6f | 1021 | if (test_bit(NFS_OPEN_STATE, &state->flags)) { |
92b40e93 | 1022 | src = &state->open_stateid; |
c82bac6f TM |
1023 | ret = true; |
1024 | } | |
92b40e93 | 1025 | nfs4_stateid_copy(dst, src); |
4fc8796d | 1026 | } while (read_seqretry(&state->seqlock, seq)); |
c82bac6f | 1027 | return ret; |
4fc8796d TM |
1028 | } |
1029 | ||
1030 | /* | |
1031 | * Byte-range lock aware utility to initialize the stateid of read/write | |
1032 | * requests. | |
1033 | */ | |
abf4e13c | 1034 | int nfs4_select_rw_stateid(struct nfs4_state *state, |
17393475 | 1035 | fmode_t fmode, const struct nfs_lock_context *l_ctx, |
abf4e13c | 1036 | nfs4_stateid *dst, struct rpc_cred **cred) |
4fc8796d | 1037 | { |
abf4e13c TM |
1038 | int ret; |
1039 | ||
7ebeb7fe TM |
1040 | if (!nfs4_valid_open_stateid(state)) |
1041 | return -EIO; | |
abf4e13c TM |
1042 | if (cred != NULL) |
1043 | *cred = NULL; | |
17393475 | 1044 | ret = nfs4_copy_lock_stateid(dst, state, l_ctx); |
ef1820f9 N |
1045 | if (ret == -EIO) |
1046 | /* A lost lock - don't even consider delegations */ | |
1047 | goto out; | |
146d70ca | 1048 | /* returns true if delegation stateid found and copied */ |
abf4e13c | 1049 | if (nfs4_copy_delegation_stateid(state->inode, fmode, dst, cred)) { |
146d70ca | 1050 | ret = 0; |
5521abfd | 1051 | goto out; |
146d70ca | 1052 | } |
5521abfd | 1053 | if (ret != -ENOENT) |
ef1820f9 N |
1054 | /* nfs4_copy_delegation_stateid() didn't over-write |
1055 | * dst, so it still has the lock stateid which we now | |
1056 | * choose to use. | |
1057 | */ | |
5521abfd | 1058 | goto out; |
927864cd TM |
1059 | nfs4_copy_open_stateid(dst, state); |
1060 | ret = 0; | |
5521abfd | 1061 | out: |
3b66486c TM |
1062 | if (nfs_server_capable(state->inode, NFS_CAP_STATEID_NFSV41)) |
1063 | dst->seqid = 0; | |
5521abfd | 1064 | return ret; |
1da177e4 LT |
1065 | } |
1066 | ||
8535b2be | 1067 | struct nfs_seqid *nfs_alloc_seqid(struct nfs_seqid_counter *counter, gfp_t gfp_mask) |
cee54fc9 | 1068 | { |
cee54fc9 TM |
1069 | struct nfs_seqid *new; |
1070 | ||
8535b2be | 1071 | new = kmalloc(sizeof(*new), gfp_mask); |
badc76dd TM |
1072 | if (new == NULL) |
1073 | return ERR_PTR(-ENOMEM); | |
1074 | new->sequence = counter; | |
1075 | INIT_LIST_HEAD(&new->list); | |
1076 | new->task = NULL; | |
cee54fc9 TM |
1077 | return new; |
1078 | } | |
1079 | ||
72211dbe | 1080 | void nfs_release_seqid(struct nfs_seqid *seqid) |
1da177e4 | 1081 | { |
4601df20 | 1082 | struct nfs_seqid_counter *sequence; |
cee54fc9 | 1083 | |
a6796419 | 1084 | if (seqid == NULL || list_empty(&seqid->list)) |
4601df20 TM |
1085 | return; |
1086 | sequence = seqid->sequence; | |
1087 | spin_lock(&sequence->lock); | |
1088 | list_del_init(&seqid->list); | |
1089 | if (!list_empty(&sequence->list)) { | |
1090 | struct nfs_seqid *next; | |
1091 | ||
1092 | next = list_first_entry(&sequence->list, | |
1093 | struct nfs_seqid, list); | |
1094 | rpc_wake_up_queued_task(&sequence->wait, next->task); | |
2f74c0a0 | 1095 | } |
4601df20 | 1096 | spin_unlock(&sequence->lock); |
72211dbe TM |
1097 | } |
1098 | ||
1099 | void nfs_free_seqid(struct nfs_seqid *seqid) | |
1100 | { | |
1101 | nfs_release_seqid(seqid); | |
cee54fc9 | 1102 | kfree(seqid); |
1da177e4 LT |
1103 | } |
1104 | ||
1105 | /* | |
cee54fc9 TM |
1106 | * Increment the seqid if the OPEN/OPEN_DOWNGRADE/CLOSE succeeded, or |
1107 | * failed with a seqid incrementing error - | |
16a6ddc7 | 1108 | * see comments nfs4.h:seqid_mutating_error() |
cee54fc9 | 1109 | */ |
88d90939 | 1110 | static void nfs_increment_seqid(int status, struct nfs_seqid *seqid) |
cee54fc9 TM |
1111 | { |
1112 | switch (status) { | |
1113 | case 0: | |
1114 | break; | |
1115 | case -NFS4ERR_BAD_SEQID: | |
6f43ddcc TM |
1116 | if (seqid->sequence->flags & NFS_SEQID_CONFIRMED) |
1117 | return; | |
9a3ba432 | 1118 | pr_warn_ratelimited("NFS: v4 server returned a bad" |
497799e7 DM |
1119 | " sequence-id error on an" |
1120 | " unconfirmed sequence %p!\n", | |
6f43ddcc | 1121 | seqid->sequence); |
cee54fc9 TM |
1122 | case -NFS4ERR_STALE_CLIENTID: |
1123 | case -NFS4ERR_STALE_STATEID: | |
1124 | case -NFS4ERR_BAD_STATEID: | |
1125 | case -NFS4ERR_BADXDR: | |
1126 | case -NFS4ERR_RESOURCE: | |
1127 | case -NFS4ERR_NOFILEHANDLE: | |
406dab84 | 1128 | case -NFS4ERR_MOVED: |
cee54fc9 TM |
1129 | /* Non-seqid mutating errors */ |
1130 | return; | |
1131 | }; | |
1132 | /* | |
1133 | * Note: no locking needed as we are guaranteed to be first | |
1134 | * on the sequence list | |
1135 | */ | |
1136 | seqid->sequence->counter++; | |
1137 | } | |
1138 | ||
1139 | void nfs_increment_open_seqid(int status, struct nfs_seqid *seqid) | |
1140 | { | |
a6796419 TM |
1141 | struct nfs4_state_owner *sp; |
1142 | ||
1143 | if (seqid == NULL) | |
1144 | return; | |
34dc1ad7 | 1145 | |
a6796419 | 1146 | sp = container_of(seqid->sequence, struct nfs4_state_owner, so_seqid); |
34dc1ad7 | 1147 | if (status == -NFS4ERR_BAD_SEQID) |
86cfb041 | 1148 | nfs4_reset_state_owner(sp); |
a6796419 | 1149 | if (!nfs4_has_session(sp->so_server->nfs_client)) |
34dc1ad7 | 1150 | nfs_increment_seqid(status, seqid); |
cee54fc9 TM |
1151 | } |
1152 | ||
1153 | /* | |
cee54fc9 TM |
1154 | * Increment the seqid if the LOCK/LOCKU succeeded, or |
1155 | * failed with a seqid incrementing error - | |
16a6ddc7 | 1156 | * see comments nfs4.h:seqid_mutating_error() |
cee54fc9 TM |
1157 | */ |
1158 | void nfs_increment_lock_seqid(int status, struct nfs_seqid *seqid) | |
1159 | { | |
a6796419 TM |
1160 | if (seqid != NULL) |
1161 | nfs_increment_seqid(status, seqid); | |
cee54fc9 TM |
1162 | } |
1163 | ||
1164 | int nfs_wait_on_sequence(struct nfs_seqid *seqid, struct rpc_task *task) | |
1165 | { | |
a6796419 | 1166 | struct nfs_seqid_counter *sequence; |
cee54fc9 TM |
1167 | int status = 0; |
1168 | ||
a6796419 TM |
1169 | if (seqid == NULL) |
1170 | goto out; | |
1171 | sequence = seqid->sequence; | |
cee54fc9 | 1172 | spin_lock(&sequence->lock); |
4601df20 | 1173 | seqid->task = task; |
2f74c0a0 TM |
1174 | if (list_empty(&seqid->list)) |
1175 | list_add_tail(&seqid->list, &sequence->list); | |
1176 | if (list_first_entry(&sequence->list, struct nfs_seqid, list) == seqid) | |
1177 | goto unlock; | |
5d00837b | 1178 | rpc_sleep_on(&sequence->wait, task, NULL); |
2f74c0a0 TM |
1179 | status = -EAGAIN; |
1180 | unlock: | |
cee54fc9 | 1181 | spin_unlock(&sequence->lock); |
a6796419 | 1182 | out: |
cee54fc9 | 1183 | return status; |
1da177e4 LT |
1184 | } |
1185 | ||
e005e804 | 1186 | static int nfs4_run_state_manager(void *); |
1da177e4 | 1187 | |
e005e804 | 1188 | static void nfs4_clear_state_manager_bit(struct nfs_client *clp) |
433fbe4c | 1189 | { |
4e857c58 | 1190 | smp_mb__before_atomic(); |
e005e804 | 1191 | clear_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state); |
4e857c58 | 1192 | smp_mb__after_atomic(); |
e005e804 | 1193 | wake_up_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING); |
433fbe4c TM |
1194 | rpc_wake_up(&clp->cl_rpcwaitq); |
1195 | } | |
1196 | ||
1da177e4 | 1197 | /* |
e005e804 | 1198 | * Schedule the nfs_client asynchronous state management routine |
1da177e4 | 1199 | */ |
b0d3ded1 | 1200 | void nfs4_schedule_state_manager(struct nfs_client *clp) |
1da177e4 | 1201 | { |
5043e900 | 1202 | struct task_struct *task; |
2446ab60 | 1203 | char buf[INET6_ADDRSTRLEN + sizeof("-manager") + 1]; |
1da177e4 | 1204 | |
e005e804 TM |
1205 | if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) != 0) |
1206 | return; | |
5043e900 | 1207 | __module_get(THIS_MODULE); |
212bf41d | 1208 | refcount_inc(&clp->cl_count); |
2446ab60 TM |
1209 | |
1210 | /* The rcu_read_lock() is not strictly necessary, as the state | |
1211 | * manager is the only thread that ever changes the rpc_xprt | |
1212 | * after it's initialized. At this point, we're single threaded. */ | |
1213 | rcu_read_lock(); | |
1214 | snprintf(buf, sizeof(buf), "%s-manager", | |
1215 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)); | |
1216 | rcu_read_unlock(); | |
f170168b | 1217 | task = kthread_run(nfs4_run_state_manager, clp, "%s", buf); |
2446ab60 TM |
1218 | if (IS_ERR(task)) { |
1219 | printk(KERN_ERR "%s: kthread_run: %ld\n", | |
1220 | __func__, PTR_ERR(task)); | |
1221 | nfs4_clear_state_manager_bit(clp); | |
1222 | nfs_put_client(clp); | |
1223 | module_put(THIS_MODULE); | |
1224 | } | |
1da177e4 LT |
1225 | } |
1226 | ||
1227 | /* | |
0400a6b0 | 1228 | * Schedule a lease recovery attempt |
1da177e4 | 1229 | */ |
0400a6b0 | 1230 | void nfs4_schedule_lease_recovery(struct nfs_client *clp) |
1da177e4 LT |
1231 | { |
1232 | if (!clp) | |
1233 | return; | |
e598d843 TM |
1234 | if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
1235 | set_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); | |
cc0a9843 TM |
1236 | dprintk("%s: scheduling lease recovery for server %s\n", __func__, |
1237 | clp->cl_hostname); | |
e005e804 | 1238 | nfs4_schedule_state_manager(clp); |
1da177e4 | 1239 | } |
9cb81968 | 1240 | EXPORT_SYMBOL_GPL(nfs4_schedule_lease_recovery); |
1da177e4 | 1241 | |
c9fdeb28 CL |
1242 | /** |
1243 | * nfs4_schedule_migration_recovery - trigger migration recovery | |
1244 | * | |
1245 | * @server: FSID that is migrating | |
1246 | * | |
1247 | * Returns zero if recovery has started, otherwise a negative NFS4ERR | |
1248 | * value is returned. | |
1249 | */ | |
1250 | int nfs4_schedule_migration_recovery(const struct nfs_server *server) | |
1251 | { | |
1252 | struct nfs_client *clp = server->nfs_client; | |
1253 | ||
1254 | if (server->fh_expire_type != NFS4_FH_PERSISTENT) { | |
1255 | pr_err("NFS: volatile file handles not supported (server %s)\n", | |
1256 | clp->cl_hostname); | |
1257 | return -NFS4ERR_IO; | |
1258 | } | |
1259 | ||
1260 | if (test_bit(NFS_MIG_FAILED, &server->mig_status)) | |
1261 | return -NFS4ERR_IO; | |
1262 | ||
1263 | dprintk("%s: scheduling migration recovery for (%llx:%llx) on %s\n", | |
1264 | __func__, | |
1265 | (unsigned long long)server->fsid.major, | |
1266 | (unsigned long long)server->fsid.minor, | |
1267 | clp->cl_hostname); | |
1268 | ||
1269 | set_bit(NFS_MIG_IN_TRANSITION, | |
1270 | &((struct nfs_server *)server)->mig_status); | |
1271 | set_bit(NFS4CLNT_MOVED, &clp->cl_state); | |
1272 | ||
1273 | nfs4_schedule_state_manager(clp); | |
1274 | return 0; | |
1275 | } | |
1276 | EXPORT_SYMBOL_GPL(nfs4_schedule_migration_recovery); | |
1277 | ||
b7f7a66e CL |
1278 | /** |
1279 | * nfs4_schedule_lease_moved_recovery - start lease-moved recovery | |
1280 | * | |
1281 | * @clp: server to check for moved leases | |
1282 | * | |
1283 | */ | |
1284 | void nfs4_schedule_lease_moved_recovery(struct nfs_client *clp) | |
1285 | { | |
1286 | dprintk("%s: scheduling lease-moved recovery for client ID %llx on %s\n", | |
1287 | __func__, clp->cl_clientid, clp->cl_hostname); | |
1288 | ||
1289 | set_bit(NFS4CLNT_LEASE_MOVED, &clp->cl_state); | |
1290 | nfs4_schedule_state_manager(clp); | |
1291 | } | |
1292 | EXPORT_SYMBOL_GPL(nfs4_schedule_lease_moved_recovery); | |
1293 | ||
33021279 TM |
1294 | int nfs4_wait_clnt_recover(struct nfs_client *clp) |
1295 | { | |
1296 | int res; | |
1297 | ||
1298 | might_sleep(); | |
1299 | ||
212bf41d | 1300 | refcount_inc(&clp->cl_count); |
74316201 N |
1301 | res = wait_on_bit_action(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING, |
1302 | nfs_wait_bit_killable, TASK_KILLABLE); | |
33021279 | 1303 | if (res) |
0625c2dd | 1304 | goto out; |
33021279 | 1305 | if (clp->cl_cons_state < 0) |
0625c2dd CL |
1306 | res = clp->cl_cons_state; |
1307 | out: | |
1308 | nfs_put_client(clp); | |
1309 | return res; | |
33021279 TM |
1310 | } |
1311 | ||
1312 | int nfs4_client_recover_expired_lease(struct nfs_client *clp) | |
1313 | { | |
1314 | unsigned int loop; | |
1315 | int ret; | |
1316 | ||
1317 | for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) { | |
1318 | ret = nfs4_wait_clnt_recover(clp); | |
1319 | if (ret != 0) | |
1320 | break; | |
1321 | if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) && | |
1322 | !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state)) | |
1323 | break; | |
1324 | nfs4_schedule_state_manager(clp); | |
1325 | ret = -EIO; | |
1326 | } | |
1327 | return ret; | |
1328 | } | |
1329 | ||
ad1e3968 TM |
1330 | /* |
1331 | * nfs40_handle_cb_pathdown - return all delegations after NFS4ERR_CB_PATH_DOWN | |
1332 | * @clp: client to process | |
1333 | * | |
1334 | * Set the NFS4CLNT_LEASE_EXPIRED state in order to force a | |
1335 | * resend of the SETCLIENTID and hence re-establish the | |
1336 | * callback channel. Then return all existing delegations. | |
1337 | */ | |
1338 | static void nfs40_handle_cb_pathdown(struct nfs_client *clp) | |
1339 | { | |
1340 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1341 | nfs_expire_all_delegations(clp); | |
cc0a9843 TM |
1342 | dprintk("%s: handling CB_PATHDOWN recovery for server %s\n", __func__, |
1343 | clp->cl_hostname); | |
ad1e3968 TM |
1344 | } |
1345 | ||
042b60be TM |
1346 | void nfs4_schedule_path_down_recovery(struct nfs_client *clp) |
1347 | { | |
ad1e3968 | 1348 | nfs40_handle_cb_pathdown(clp); |
042b60be TM |
1349 | nfs4_schedule_state_manager(clp); |
1350 | } | |
1351 | ||
f9feab1e | 1352 | static int nfs4_state_mark_reclaim_reboot(struct nfs_client *clp, struct nfs4_state *state) |
b79a4a1b TM |
1353 | { |
1354 | ||
7ebeb7fe TM |
1355 | if (!nfs4_valid_open_stateid(state)) |
1356 | return 0; | |
b79a4a1b TM |
1357 | set_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); |
1358 | /* Don't recover state that expired before the reboot */ | |
1359 | if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) { | |
1360 | clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); | |
1361 | return 0; | |
1362 | } | |
7eff03ae | 1363 | set_bit(NFS_OWNER_RECLAIM_REBOOT, &state->owner->so_flags); |
b79a4a1b TM |
1364 | set_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state); |
1365 | return 1; | |
1366 | } | |
1367 | ||
4f14c194 | 1368 | int nfs4_state_mark_reclaim_nograce(struct nfs_client *clp, struct nfs4_state *state) |
b79a4a1b | 1369 | { |
7ebeb7fe TM |
1370 | if (!nfs4_valid_open_stateid(state)) |
1371 | return 0; | |
b79a4a1b TM |
1372 | set_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags); |
1373 | clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); | |
7eff03ae | 1374 | set_bit(NFS_OWNER_RECLAIM_NOGRACE, &state->owner->so_flags); |
b79a4a1b TM |
1375 | set_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state); |
1376 | return 1; | |
1377 | } | |
1378 | ||
5d422301 | 1379 | int nfs4_schedule_stateid_recovery(const struct nfs_server *server, struct nfs4_state *state) |
0400a6b0 TM |
1380 | { |
1381 | struct nfs_client *clp = server->nfs_client; | |
1382 | ||
7ebeb7fe | 1383 | if (!nfs4_state_mark_reclaim_nograce(clp, state)) |
5d422301 | 1384 | return -EBADF; |
cc0a9843 TM |
1385 | dprintk("%s: scheduling stateid recovery for server %s\n", __func__, |
1386 | clp->cl_hostname); | |
0400a6b0 | 1387 | nfs4_schedule_state_manager(clp); |
5d422301 | 1388 | return 0; |
0400a6b0 | 1389 | } |
9cb81968 | 1390 | EXPORT_SYMBOL_GPL(nfs4_schedule_stateid_recovery); |
0400a6b0 | 1391 | |
6c2d8f8d TM |
1392 | static struct nfs4_lock_state * |
1393 | nfs_state_find_lock_state_by_stateid(struct nfs4_state *state, | |
1394 | const nfs4_stateid *stateid) | |
1395 | { | |
1396 | struct nfs4_lock_state *pos; | |
1397 | ||
1398 | list_for_each_entry(pos, &state->lock_states, ls_locks) { | |
1399 | if (!test_bit(NFS_LOCK_INITIALIZED, &pos->ls_flags)) | |
1400 | continue; | |
1401 | if (nfs4_stateid_match_other(&pos->ls_stateid, stateid)) | |
1402 | return pos; | |
1403 | } | |
1404 | return NULL; | |
1405 | } | |
1406 | ||
1407 | static bool nfs_state_lock_state_matches_stateid(struct nfs4_state *state, | |
1408 | const nfs4_stateid *stateid) | |
1409 | { | |
1410 | bool found = false; | |
1411 | ||
1412 | if (test_bit(LK_STATE_IN_USE, &state->flags)) { | |
1413 | spin_lock(&state->state_lock); | |
1414 | if (nfs_state_find_lock_state_by_stateid(state, stateid)) | |
1415 | found = true; | |
1416 | spin_unlock(&state->state_lock); | |
1417 | } | |
1418 | return found; | |
1419 | } | |
1420 | ||
a1d0b5ee TM |
1421 | void nfs_inode_find_state_and_recover(struct inode *inode, |
1422 | const nfs4_stateid *stateid) | |
1423 | { | |
1424 | struct nfs_client *clp = NFS_SERVER(inode)->nfs_client; | |
1425 | struct nfs_inode *nfsi = NFS_I(inode); | |
1426 | struct nfs_open_context *ctx; | |
1427 | struct nfs4_state *state; | |
1428 | bool found = false; | |
1429 | ||
1430 | spin_lock(&inode->i_lock); | |
1431 | list_for_each_entry(ctx, &nfsi->open_files, list) { | |
1432 | state = ctx->state; | |
1433 | if (state == NULL) | |
1434 | continue; | |
7ebeb7fe TM |
1435 | if (nfs4_stateid_match_other(&state->stateid, stateid) && |
1436 | nfs4_state_mark_reclaim_nograce(clp, state)) { | |
6c2d8f8d | 1437 | found = true; |
a1d0b5ee | 1438 | continue; |
6c2d8f8d | 1439 | } |
46280d9d TM |
1440 | if (nfs4_stateid_match_other(&state->open_stateid, stateid) && |
1441 | nfs4_state_mark_reclaim_nograce(clp, state)) { | |
1442 | found = true; | |
1443 | continue; | |
1444 | } | |
7ebeb7fe TM |
1445 | if (nfs_state_lock_state_matches_stateid(state, stateid) && |
1446 | nfs4_state_mark_reclaim_nograce(clp, state)) | |
6c2d8f8d | 1447 | found = true; |
a1d0b5ee TM |
1448 | } |
1449 | spin_unlock(&inode->i_lock); | |
6c2d8f8d TM |
1450 | |
1451 | nfs_inode_find_delegation_state_and_recover(inode, stateid); | |
a1d0b5ee TM |
1452 | if (found) |
1453 | nfs4_schedule_state_manager(clp); | |
1454 | } | |
1455 | ||
c58c8441 TM |
1456 | static void nfs4_state_mark_open_context_bad(struct nfs4_state *state) |
1457 | { | |
1458 | struct inode *inode = state->inode; | |
1459 | struct nfs_inode *nfsi = NFS_I(inode); | |
1460 | struct nfs_open_context *ctx; | |
1461 | ||
1462 | spin_lock(&inode->i_lock); | |
1463 | list_for_each_entry(ctx, &nfsi->open_files, list) { | |
1464 | if (ctx->state != state) | |
1465 | continue; | |
1466 | set_bit(NFS_CONTEXT_BAD, &ctx->flags); | |
1467 | } | |
1468 | spin_unlock(&inode->i_lock); | |
1469 | } | |
1470 | ||
5d422301 TM |
1471 | static void nfs4_state_mark_recovery_failed(struct nfs4_state *state, int error) |
1472 | { | |
1473 | set_bit(NFS_STATE_RECOVERY_FAILED, &state->flags); | |
c58c8441 | 1474 | nfs4_state_mark_open_context_bad(state); |
5d422301 TM |
1475 | } |
1476 | ||
a1d0b5ee | 1477 | |
02860014 | 1478 | static int nfs4_reclaim_locks(struct nfs4_state *state, const struct nfs4_state_recovery_ops *ops) |
1da177e4 LT |
1479 | { |
1480 | struct inode *inode = state->inode; | |
19e03c57 | 1481 | struct nfs_inode *nfsi = NFS_I(inode); |
1da177e4 | 1482 | struct file_lock *fl; |
dce2630c | 1483 | struct nfs4_lock_state *lsp; |
1da177e4 | 1484 | int status = 0; |
5263e31e | 1485 | struct file_lock_context *flctx = inode->i_flctx; |
bd61e0a9 | 1486 | struct list_head *list; |
1da177e4 | 1487 | |
bd61e0a9 | 1488 | if (flctx == NULL) |
3f09df70 TM |
1489 | return 0; |
1490 | ||
bd61e0a9 JL |
1491 | list = &flctx->flc_posix; |
1492 | ||
3f09df70 | 1493 | /* Guard against delegation returns and new lock/unlock calls */ |
19e03c57 | 1494 | down_write(&nfsi->rwsem); |
6109c850 | 1495 | spin_lock(&flctx->flc_lock); |
bd61e0a9 JL |
1496 | restart: |
1497 | list_for_each_entry(fl, list, fl_list) { | |
5263e31e JL |
1498 | if (nfs_file_open_context(fl->fl_file)->state != state) |
1499 | continue; | |
6109c850 | 1500 | spin_unlock(&flctx->flc_lock); |
5263e31e JL |
1501 | status = ops->recover_lock(state, fl); |
1502 | switch (status) { | |
1503 | case 0: | |
1504 | break; | |
1505 | case -ESTALE: | |
1506 | case -NFS4ERR_ADMIN_REVOKED: | |
1507 | case -NFS4ERR_STALE_STATEID: | |
1508 | case -NFS4ERR_BAD_STATEID: | |
1509 | case -NFS4ERR_EXPIRED: | |
1510 | case -NFS4ERR_NO_GRACE: | |
1511 | case -NFS4ERR_STALE_CLIENTID: | |
1512 | case -NFS4ERR_BADSESSION: | |
1513 | case -NFS4ERR_BADSLOT: | |
1514 | case -NFS4ERR_BAD_HIGH_SLOT: | |
1515 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
1516 | goto out; | |
1517 | default: | |
1518 | pr_err("NFS: %s: unhandled error %d\n", | |
1519 | __func__, status); | |
1520 | case -ENOMEM: | |
1521 | case -NFS4ERR_DENIED: | |
1522 | case -NFS4ERR_RECLAIM_BAD: | |
1523 | case -NFS4ERR_RECLAIM_CONFLICT: | |
dce2630c N |
1524 | lsp = fl->fl_u.nfs4_fl.owner; |
1525 | if (lsp) | |
1526 | set_bit(NFS_LOCK_LOST, &lsp->ls_flags); | |
5263e31e JL |
1527 | status = 0; |
1528 | } | |
6109c850 | 1529 | spin_lock(&flctx->flc_lock); |
5263e31e | 1530 | } |
bd61e0a9 JL |
1531 | if (list == &flctx->flc_posix) { |
1532 | list = &flctx->flc_flock; | |
1533 | goto restart; | |
1534 | } | |
6109c850 | 1535 | spin_unlock(&flctx->flc_lock); |
965b5d67 | 1536 | out: |
19e03c57 | 1537 | up_write(&nfsi->rwsem); |
1da177e4 LT |
1538 | return status; |
1539 | } | |
1540 | ||
02860014 | 1541 | static int nfs4_reclaim_open_state(struct nfs4_state_owner *sp, const struct nfs4_state_recovery_ops *ops) |
1da177e4 LT |
1542 | { |
1543 | struct nfs4_state *state; | |
1544 | struct nfs4_lock_state *lock; | |
1545 | int status = 0; | |
1546 | ||
1547 | /* Note: we rely on the sp->so_states list being ordered | |
1548 | * so that we always reclaim open(O_RDWR) and/or open(O_WRITE) | |
1549 | * states first. | |
1550 | * This is needed to ensure that the server won't give us any | |
1551 | * read delegations that we have to return if, say, we are | |
1552 | * recovering after a network partition or a reboot from a | |
1553 | * server that doesn't support a grace period. | |
1554 | */ | |
fe1d8195 | 1555 | spin_lock(&sp->so_lock); |
abbec2da | 1556 | raw_write_seqcount_begin(&sp->so_reclaim_seqcount); |
c137afab | 1557 | restart: |
1da177e4 | 1558 | list_for_each_entry(state, &sp->so_states, open_states) { |
b79a4a1b TM |
1559 | if (!test_and_clear_bit(ops->state_flag_bit, &state->flags)) |
1560 | continue; | |
5d422301 TM |
1561 | if (!nfs4_valid_open_stateid(state)) |
1562 | continue; | |
1da177e4 LT |
1563 | if (state->state == 0) |
1564 | continue; | |
fe1d8195 TM |
1565 | atomic_inc(&state->count); |
1566 | spin_unlock(&sp->so_lock); | |
1da177e4 | 1567 | status = ops->recover_open(sp, state); |
1da177e4 | 1568 | if (status >= 0) { |
02860014 TM |
1569 | status = nfs4_reclaim_locks(state, ops); |
1570 | if (status >= 0) { | |
1acd1c30 | 1571 | if (!test_bit(NFS_DELEGATED_STATE, &state->flags)) { |
6686390b N |
1572 | spin_lock(&state->state_lock); |
1573 | list_for_each_entry(lock, &state->lock_states, ls_locks) { | |
1574 | if (!test_bit(NFS_LOCK_INITIALIZED, &lock->ls_flags)) | |
1575 | pr_warn_ratelimited("NFS: " | |
1576 | "%s: Lock reclaim " | |
1577 | "failed!\n", __func__); | |
1578 | } | |
1579 | spin_unlock(&state->state_lock); | |
02860014 | 1580 | } |
a41cbe86 | 1581 | clear_bit(NFS_STATE_RECLAIM_NOGRACE, |
e8d975e7 | 1582 | &state->flags); |
cea7f829 | 1583 | nfs4_put_open_state(state); |
c137afab | 1584 | spin_lock(&sp->so_lock); |
fe1d8195 | 1585 | goto restart; |
1da177e4 | 1586 | } |
1da177e4 LT |
1587 | } |
1588 | switch (status) { | |
1589 | default: | |
3660cd43 AA |
1590 | printk(KERN_ERR "NFS: %s: unhandled error %d\n", |
1591 | __func__, status); | |
1da177e4 | 1592 | case -ENOENT: |
965b5d67 | 1593 | case -ENOMEM: |
304020fe TM |
1594 | case -EACCES: |
1595 | case -EROFS: | |
1596 | case -EIO: | |
b79a4a1b | 1597 | case -ESTALE: |
3660cd43 | 1598 | /* Open state on this file cannot be recovered */ |
5d422301 | 1599 | nfs4_state_mark_recovery_failed(state, status); |
1da177e4 | 1600 | break; |
91876b13 TM |
1601 | case -EAGAIN: |
1602 | ssleep(1); | |
965b5d67 TM |
1603 | case -NFS4ERR_ADMIN_REVOKED: |
1604 | case -NFS4ERR_STALE_STATEID: | |
d41cbfc9 | 1605 | case -NFS4ERR_OLD_STATEID: |
965b5d67 | 1606 | case -NFS4ERR_BAD_STATEID: |
b79a4a1b TM |
1607 | case -NFS4ERR_RECLAIM_BAD: |
1608 | case -NFS4ERR_RECLAIM_CONFLICT: | |
1f0e890d | 1609 | nfs4_state_mark_reclaim_nograce(sp->so_server->nfs_client, state); |
b79a4a1b | 1610 | break; |
1da177e4 LT |
1611 | case -NFS4ERR_EXPIRED: |
1612 | case -NFS4ERR_NO_GRACE: | |
1f0e890d | 1613 | nfs4_state_mark_reclaim_nograce(sp->so_server->nfs_client, state); |
1da177e4 | 1614 | case -NFS4ERR_STALE_CLIENTID: |
9c4c761a TM |
1615 | case -NFS4ERR_BADSESSION: |
1616 | case -NFS4ERR_BADSLOT: | |
1617 | case -NFS4ERR_BAD_HIGH_SLOT: | |
1618 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
1da177e4 LT |
1619 | goto out_err; |
1620 | } | |
fe1d8195 | 1621 | nfs4_put_open_state(state); |
c137afab | 1622 | spin_lock(&sp->so_lock); |
fe1d8195 | 1623 | goto restart; |
1da177e4 | 1624 | } |
abbec2da | 1625 | raw_write_seqcount_end(&sp->so_reclaim_seqcount); |
fe1d8195 | 1626 | spin_unlock(&sp->so_lock); |
1da177e4 LT |
1627 | return 0; |
1628 | out_err: | |
fe1d8195 | 1629 | nfs4_put_open_state(state); |
c137afab | 1630 | spin_lock(&sp->so_lock); |
abbec2da | 1631 | raw_write_seqcount_end(&sp->so_reclaim_seqcount); |
c137afab | 1632 | spin_unlock(&sp->so_lock); |
1da177e4 LT |
1633 | return status; |
1634 | } | |
1635 | ||
b79a4a1b TM |
1636 | static void nfs4_clear_open_state(struct nfs4_state *state) |
1637 | { | |
1638 | struct nfs4_lock_state *lock; | |
1639 | ||
1640 | clear_bit(NFS_DELEGATED_STATE, &state->flags); | |
1641 | clear_bit(NFS_O_RDONLY_STATE, &state->flags); | |
1642 | clear_bit(NFS_O_WRONLY_STATE, &state->flags); | |
1643 | clear_bit(NFS_O_RDWR_STATE, &state->flags); | |
4b44b40e | 1644 | spin_lock(&state->state_lock); |
b79a4a1b | 1645 | list_for_each_entry(lock, &state->lock_states, ls_locks) { |
b79a4a1b | 1646 | lock->ls_seqid.flags = 0; |
795a88c9 | 1647 | clear_bit(NFS_LOCK_INITIALIZED, &lock->ls_flags); |
b79a4a1b | 1648 | } |
4b44b40e | 1649 | spin_unlock(&state->state_lock); |
b79a4a1b TM |
1650 | } |
1651 | ||
24d292b8 CL |
1652 | static void nfs4_reset_seqids(struct nfs_server *server, |
1653 | int (*mark_reclaim)(struct nfs_client *clp, struct nfs4_state *state)) | |
cee54fc9 | 1654 | { |
24d292b8 | 1655 | struct nfs_client *clp = server->nfs_client; |
cee54fc9 | 1656 | struct nfs4_state_owner *sp; |
9f958ab8 | 1657 | struct rb_node *pos; |
cee54fc9 | 1658 | struct nfs4_state *state; |
cee54fc9 | 1659 | |
24d292b8 CL |
1660 | spin_lock(&clp->cl_lock); |
1661 | for (pos = rb_first(&server->state_owners); | |
1662 | pos != NULL; | |
1663 | pos = rb_next(pos)) { | |
1664 | sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); | |
cee54fc9 | 1665 | sp->so_seqid.flags = 0; |
ec073428 | 1666 | spin_lock(&sp->so_lock); |
cee54fc9 | 1667 | list_for_each_entry(state, &sp->so_states, open_states) { |
b79a4a1b TM |
1668 | if (mark_reclaim(clp, state)) |
1669 | nfs4_clear_open_state(state); | |
cee54fc9 | 1670 | } |
ec073428 | 1671 | spin_unlock(&sp->so_lock); |
cee54fc9 | 1672 | } |
24d292b8 CL |
1673 | spin_unlock(&clp->cl_lock); |
1674 | } | |
1675 | ||
1676 | static void nfs4_state_mark_reclaim_helper(struct nfs_client *clp, | |
1677 | int (*mark_reclaim)(struct nfs_client *clp, struct nfs4_state *state)) | |
1678 | { | |
1679 | struct nfs_server *server; | |
1680 | ||
1681 | rcu_read_lock(); | |
1682 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) | |
1683 | nfs4_reset_seqids(server, mark_reclaim); | |
1684 | rcu_read_unlock(); | |
cee54fc9 TM |
1685 | } |
1686 | ||
b79a4a1b TM |
1687 | static void nfs4_state_start_reclaim_reboot(struct nfs_client *clp) |
1688 | { | |
1689 | /* Mark all delegations for reclaim */ | |
1690 | nfs_delegation_mark_reclaim(clp); | |
1691 | nfs4_state_mark_reclaim_helper(clp, nfs4_state_mark_reclaim_reboot); | |
1692 | } | |
1693 | ||
0048fdd0 | 1694 | static int nfs4_reclaim_complete(struct nfs_client *clp, |
965e9c23 TM |
1695 | const struct nfs4_state_recovery_ops *ops, |
1696 | struct rpc_cred *cred) | |
fce5c838 RL |
1697 | { |
1698 | /* Notify the server we're done reclaiming our state */ | |
1699 | if (ops->reclaim_complete) | |
0048fdd0 TM |
1700 | return ops->reclaim_complete(clp, cred); |
1701 | return 0; | |
fce5c838 RL |
1702 | } |
1703 | ||
24d292b8 | 1704 | static void nfs4_clear_reclaim_server(struct nfs_server *server) |
b79a4a1b | 1705 | { |
24d292b8 | 1706 | struct nfs_client *clp = server->nfs_client; |
b79a4a1b TM |
1707 | struct nfs4_state_owner *sp; |
1708 | struct rb_node *pos; | |
1709 | struct nfs4_state *state; | |
1710 | ||
24d292b8 CL |
1711 | spin_lock(&clp->cl_lock); |
1712 | for (pos = rb_first(&server->state_owners); | |
1713 | pos != NULL; | |
1714 | pos = rb_next(pos)) { | |
1715 | sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); | |
b79a4a1b TM |
1716 | spin_lock(&sp->so_lock); |
1717 | list_for_each_entry(state, &sp->so_states, open_states) { | |
24d292b8 CL |
1718 | if (!test_and_clear_bit(NFS_STATE_RECLAIM_REBOOT, |
1719 | &state->flags)) | |
b79a4a1b TM |
1720 | continue; |
1721 | nfs4_state_mark_reclaim_nograce(clp, state); | |
1722 | } | |
1723 | spin_unlock(&sp->so_lock); | |
1724 | } | |
24d292b8 CL |
1725 | spin_unlock(&clp->cl_lock); |
1726 | } | |
1727 | ||
1728 | static int nfs4_state_clear_reclaim_reboot(struct nfs_client *clp) | |
1729 | { | |
1730 | struct nfs_server *server; | |
1731 | ||
1732 | if (!test_and_clear_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) | |
1733 | return 0; | |
1734 | ||
1735 | rcu_read_lock(); | |
1736 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) | |
1737 | nfs4_clear_reclaim_server(server); | |
1738 | rcu_read_unlock(); | |
b79a4a1b TM |
1739 | |
1740 | nfs_delegation_reap_unclaimed(clp); | |
6eaa6149 TM |
1741 | return 1; |
1742 | } | |
1743 | ||
1744 | static void nfs4_state_end_reclaim_reboot(struct nfs_client *clp) | |
1745 | { | |
965e9c23 TM |
1746 | const struct nfs4_state_recovery_ops *ops; |
1747 | struct rpc_cred *cred; | |
0048fdd0 | 1748 | int err; |
965e9c23 | 1749 | |
6eaa6149 TM |
1750 | if (!nfs4_state_clear_reclaim_reboot(clp)) |
1751 | return; | |
965e9c23 | 1752 | ops = clp->cl_mvops->reboot_recovery_ops; |
73d8bde5 | 1753 | cred = nfs4_get_clid_cred(clp); |
0048fdd0 | 1754 | err = nfs4_reclaim_complete(clp, ops, cred); |
965e9c23 | 1755 | put_rpccred(cred); |
0048fdd0 TM |
1756 | if (err == -NFS4ERR_CONN_NOT_BOUND_TO_SESSION) |
1757 | set_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state); | |
b79a4a1b TM |
1758 | } |
1759 | ||
b79a4a1b TM |
1760 | static void nfs4_state_start_reclaim_nograce(struct nfs_client *clp) |
1761 | { | |
45870d69 | 1762 | nfs_mark_test_expired_all_delegations(clp); |
b79a4a1b TM |
1763 | nfs4_state_mark_reclaim_helper(clp, nfs4_state_mark_reclaim_nograce); |
1764 | } | |
1765 | ||
4f7cdf18 | 1766 | static int nfs4_recovery_handle_error(struct nfs_client *clp, int error) |
e598d843 TM |
1767 | { |
1768 | switch (error) { | |
4f38e4aa TM |
1769 | case 0: |
1770 | break; | |
e598d843 | 1771 | case -NFS4ERR_CB_PATH_DOWN: |
ad1e3968 | 1772 | nfs40_handle_cb_pathdown(clp); |
4f38e4aa | 1773 | break; |
c8b7ae3d TM |
1774 | case -NFS4ERR_NO_GRACE: |
1775 | nfs4_state_end_reclaim_reboot(clp); | |
4f38e4aa | 1776 | break; |
e598d843 | 1777 | case -NFS4ERR_STALE_CLIENTID: |
e598d843 TM |
1778 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); |
1779 | nfs4_state_start_reclaim_reboot(clp); | |
1780 | break; | |
1781 | case -NFS4ERR_EXPIRED: | |
1782 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1783 | nfs4_state_start_reclaim_nograce(clp); | |
8ba9bf8e | 1784 | break; |
c3fad1b1 AA |
1785 | case -NFS4ERR_BADSESSION: |
1786 | case -NFS4ERR_BADSLOT: | |
1787 | case -NFS4ERR_BAD_HIGH_SLOT: | |
1788 | case -NFS4ERR_DEADSESSION: | |
c3fad1b1 AA |
1789 | case -NFS4ERR_SEQ_FALSE_RETRY: |
1790 | case -NFS4ERR_SEQ_MISORDERED: | |
6df08189 | 1791 | set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); |
0b9e2d41 | 1792 | /* Zero session reset errors */ |
4f38e4aa | 1793 | break; |
7c5d7256 TM |
1794 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: |
1795 | set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); | |
1796 | break; | |
4f38e4aa | 1797 | default: |
cc0a9843 TM |
1798 | dprintk("%s: failed to handle error %d for server %s\n", |
1799 | __func__, error, clp->cl_hostname); | |
4f38e4aa | 1800 | return error; |
e598d843 | 1801 | } |
cc0a9843 TM |
1802 | dprintk("%s: handled error %d for server %s\n", __func__, error, |
1803 | clp->cl_hostname); | |
4f38e4aa | 1804 | return 0; |
e598d843 TM |
1805 | } |
1806 | ||
02860014 | 1807 | static int nfs4_do_reclaim(struct nfs_client *clp, const struct nfs4_state_recovery_ops *ops) |
1da177e4 | 1808 | { |
24d292b8 CL |
1809 | struct nfs4_state_owner *sp; |
1810 | struct nfs_server *server; | |
9f958ab8 | 1811 | struct rb_node *pos; |
1da177e4 LT |
1812 | int status = 0; |
1813 | ||
7eff03ae | 1814 | restart: |
24d292b8 CL |
1815 | rcu_read_lock(); |
1816 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { | |
0aaaf5c4 | 1817 | nfs4_purge_state_owners(server); |
24d292b8 CL |
1818 | spin_lock(&clp->cl_lock); |
1819 | for (pos = rb_first(&server->state_owners); | |
1820 | pos != NULL; | |
1821 | pos = rb_next(pos)) { | |
1822 | sp = rb_entry(pos, | |
1823 | struct nfs4_state_owner, so_server_node); | |
1824 | if (!test_and_clear_bit(ops->owner_flag_bit, | |
1825 | &sp->so_flags)) | |
1826 | continue; | |
4a0954ef TM |
1827 | if (!atomic_inc_not_zero(&sp->so_count)) |
1828 | continue; | |
24d292b8 CL |
1829 | spin_unlock(&clp->cl_lock); |
1830 | rcu_read_unlock(); | |
1831 | ||
1832 | status = nfs4_reclaim_open_state(sp, ops); | |
1833 | if (status < 0) { | |
1834 | set_bit(ops->owner_flag_bit, &sp->so_flags); | |
1835 | nfs4_put_state_owner(sp); | |
df817ba3 TM |
1836 | status = nfs4_recovery_handle_error(clp, status); |
1837 | return (status != 0) ? status : -EAGAIN; | |
24d292b8 CL |
1838 | } |
1839 | ||
7eff03ae | 1840 | nfs4_put_state_owner(sp); |
24d292b8 | 1841 | goto restart; |
7eff03ae | 1842 | } |
24d292b8 | 1843 | spin_unlock(&clp->cl_lock); |
02860014 | 1844 | } |
24d292b8 | 1845 | rcu_read_unlock(); |
df817ba3 | 1846 | return 0; |
02860014 TM |
1847 | } |
1848 | ||
1849 | static int nfs4_check_lease(struct nfs_client *clp) | |
1850 | { | |
1851 | struct rpc_cred *cred; | |
c48f4f35 TM |
1852 | const struct nfs4_state_maintenance_ops *ops = |
1853 | clp->cl_mvops->state_renewal_ops; | |
4f38e4aa | 1854 | int status; |
1da177e4 | 1855 | |
0f605b56 TM |
1856 | /* Is the client already known to have an expired lease? */ |
1857 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) | |
1858 | return 0; | |
a7b72103 AA |
1859 | spin_lock(&clp->cl_lock); |
1860 | cred = ops->get_state_renewal_cred_locked(clp); | |
1861 | spin_unlock(&clp->cl_lock); | |
0f605b56 | 1862 | if (cred == NULL) { |
73d8bde5 | 1863 | cred = nfs4_get_clid_cred(clp); |
4f38e4aa | 1864 | status = -ENOKEY; |
0f605b56 TM |
1865 | if (cred == NULL) |
1866 | goto out; | |
286d7d6a | 1867 | } |
8e69514f | 1868 | status = ops->renew_lease(clp, cred); |
0f605b56 | 1869 | put_rpccred(cred); |
bc7a05ca TM |
1870 | if (status == -ETIMEDOUT) { |
1871 | set_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); | |
1872 | return 0; | |
1873 | } | |
0f605b56 | 1874 | out: |
4f7cdf18 | 1875 | return nfs4_recovery_handle_error(clp, status); |
02860014 TM |
1876 | } |
1877 | ||
47b803c8 AA |
1878 | /* Set NFS4CLNT_LEASE_EXPIRED and reclaim reboot state for all v4.0 errors |
1879 | * and for recoverable errors on EXCHANGE_ID for v4.1 | |
2a6ee6aa TM |
1880 | */ |
1881 | static int nfs4_handle_reclaim_lease_error(struct nfs_client *clp, int status) | |
1882 | { | |
1883 | switch (status) { | |
89a21736 TM |
1884 | case -NFS4ERR_SEQ_MISORDERED: |
1885 | if (test_and_set_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) | |
1886 | return -ESERVERFAULT; | |
1887 | /* Lease confirmation error: retry after purging the lease */ | |
1888 | ssleep(1); | |
47b803c8 AA |
1889 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
1890 | break; | |
2a6ee6aa TM |
1891 | case -NFS4ERR_STALE_CLIENTID: |
1892 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); | |
47b803c8 | 1893 | nfs4_state_start_reclaim_reboot(clp); |
2a6ee6aa | 1894 | break; |
de734831 CL |
1895 | case -NFS4ERR_CLID_INUSE: |
1896 | pr_err("NFS: Server %s reports our clientid is in use\n", | |
1897 | clp->cl_hostname); | |
1898 | nfs_mark_client_ready(clp, -EPERM); | |
1899 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); | |
1900 | return -EPERM; | |
2a6ee6aa | 1901 | case -EACCES: |
2a6ee6aa TM |
1902 | case -NFS4ERR_DELAY: |
1903 | case -ETIMEDOUT: | |
1904 | case -EAGAIN: | |
1905 | ssleep(1); | |
1906 | break; | |
1907 | ||
1908 | case -NFS4ERR_MINOR_VERS_MISMATCH: | |
1909 | if (clp->cl_cons_state == NFS_CS_SESSION_INITING) | |
1910 | nfs_mark_client_ready(clp, -EPROTONOSUPPORT); | |
cc0a9843 TM |
1911 | dprintk("%s: exit with error %d for server %s\n", |
1912 | __func__, -EPROTONOSUPPORT, clp->cl_hostname); | |
2a6ee6aa | 1913 | return -EPROTONOSUPPORT; |
2a6ee6aa TM |
1914 | case -NFS4ERR_NOT_SAME: /* FixMe: implement recovery |
1915 | * in nfs4_exchange_id */ | |
1916 | default: | |
cc0a9843 TM |
1917 | dprintk("%s: exit with error %d for server %s\n", __func__, |
1918 | status, clp->cl_hostname); | |
2a6ee6aa TM |
1919 | return status; |
1920 | } | |
1921 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
cc0a9843 TM |
1922 | dprintk("%s: handled error %d for server %s\n", __func__, status, |
1923 | clp->cl_hostname); | |
2a6ee6aa TM |
1924 | return 0; |
1925 | } | |
1926 | ||
b42353ff | 1927 | static int nfs4_establish_lease(struct nfs_client *clp) |
02860014 TM |
1928 | { |
1929 | struct rpc_cred *cred; | |
c48f4f35 TM |
1930 | const struct nfs4_state_recovery_ops *ops = |
1931 | clp->cl_mvops->reboot_recovery_ops; | |
2a6ee6aa | 1932 | int status; |
02860014 | 1933 | |
5cae02f4 | 1934 | nfs4_begin_drain_session(clp); |
73d8bde5 | 1935 | cred = nfs4_get_clid_cred(clp); |
2a6ee6aa TM |
1936 | if (cred == NULL) |
1937 | return -ENOENT; | |
1938 | status = ops->establish_clid(clp, cred); | |
1939 | put_rpccred(cred); | |
1940 | if (status != 0) | |
b42353ff TM |
1941 | return status; |
1942 | pnfs_destroy_all_layouts(clp); | |
1943 | return 0; | |
1944 | } | |
1945 | ||
6bbb4ae8 CL |
1946 | /* |
1947 | * Returns zero or a negative errno. NFS4ERR values are converted | |
1948 | * to local errno values. | |
1949 | */ | |
b42353ff TM |
1950 | static int nfs4_reclaim_lease(struct nfs_client *clp) |
1951 | { | |
1952 | int status; | |
1953 | ||
1954 | status = nfs4_establish_lease(clp); | |
1955 | if (status < 0) | |
1956 | return nfs4_handle_reclaim_lease_error(clp, status); | |
1957 | if (test_and_clear_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state)) | |
1958 | nfs4_state_start_reclaim_nograce(clp); | |
1959 | if (!test_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) | |
1960 | set_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state); | |
1961 | clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); | |
1962 | clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1963 | return 0; | |
1964 | } | |
1965 | ||
1966 | static int nfs4_purge_lease(struct nfs_client *clp) | |
1967 | { | |
1968 | int status; | |
1969 | ||
1970 | status = nfs4_establish_lease(clp); | |
1971 | if (status < 0) | |
2a6ee6aa | 1972 | return nfs4_handle_reclaim_lease_error(clp, status); |
b42353ff TM |
1973 | clear_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state); |
1974 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1975 | nfs4_state_start_reclaim_nograce(clp); | |
2a6ee6aa | 1976 | return 0; |
02860014 TM |
1977 | } |
1978 | ||
c9fdeb28 CL |
1979 | /* |
1980 | * Try remote migration of one FSID from a source server to a | |
1981 | * destination server. The source server provides a list of | |
1982 | * potential destinations. | |
1983 | * | |
1984 | * Returns zero or a negative NFS4ERR status code. | |
1985 | */ | |
1986 | static int nfs4_try_migration(struct nfs_server *server, struct rpc_cred *cred) | |
1987 | { | |
1988 | struct nfs_client *clp = server->nfs_client; | |
1989 | struct nfs4_fs_locations *locations = NULL; | |
1990 | struct inode *inode; | |
1991 | struct page *page; | |
1992 | int status, result; | |
1993 | ||
1994 | dprintk("--> %s: FSID %llx:%llx on \"%s\"\n", __func__, | |
1995 | (unsigned long long)server->fsid.major, | |
1996 | (unsigned long long)server->fsid.minor, | |
1997 | clp->cl_hostname); | |
1998 | ||
1999 | result = 0; | |
2000 | page = alloc_page(GFP_KERNEL); | |
2001 | locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL); | |
2002 | if (page == NULL || locations == NULL) { | |
2003 | dprintk("<-- %s: no memory\n", __func__); | |
2004 | goto out; | |
2005 | } | |
2006 | ||
2b0143b5 | 2007 | inode = d_inode(server->super->s_root); |
c9fdeb28 CL |
2008 | result = nfs4_proc_get_locations(inode, locations, page, cred); |
2009 | if (result) { | |
2010 | dprintk("<-- %s: failed to retrieve fs_locations: %d\n", | |
2011 | __func__, result); | |
2012 | goto out; | |
2013 | } | |
2014 | ||
2015 | result = -NFS4ERR_NXIO; | |
2016 | if (!(locations->fattr.valid & NFS_ATTR_FATTR_V4_LOCATIONS)) { | |
2017 | dprintk("<-- %s: No fs_locations data, migration skipped\n", | |
2018 | __func__); | |
2019 | goto out; | |
2020 | } | |
2021 | ||
2022 | nfs4_begin_drain_session(clp); | |
2023 | ||
2024 | status = nfs4_replace_transport(server, locations); | |
2025 | if (status != 0) { | |
2026 | dprintk("<-- %s: failed to replace transport: %d\n", | |
2027 | __func__, status); | |
2028 | goto out; | |
2029 | } | |
2030 | ||
2031 | result = 0; | |
2032 | dprintk("<-- %s: migration succeeded\n", __func__); | |
2033 | ||
2034 | out: | |
2035 | if (page != NULL) | |
2036 | __free_page(page); | |
2037 | kfree(locations); | |
2038 | if (result) { | |
2039 | pr_err("NFS: migration recovery failed (server %s)\n", | |
2040 | clp->cl_hostname); | |
2041 | set_bit(NFS_MIG_FAILED, &server->mig_status); | |
2042 | } | |
2043 | return result; | |
2044 | } | |
2045 | ||
2046 | /* | |
2047 | * Returns zero or a negative NFS4ERR status code. | |
2048 | */ | |
2049 | static int nfs4_handle_migration(struct nfs_client *clp) | |
2050 | { | |
2051 | const struct nfs4_state_maintenance_ops *ops = | |
2052 | clp->cl_mvops->state_renewal_ops; | |
2053 | struct nfs_server *server; | |
2054 | struct rpc_cred *cred; | |
2055 | ||
2056 | dprintk("%s: migration reported on \"%s\"\n", __func__, | |
2057 | clp->cl_hostname); | |
2058 | ||
2059 | spin_lock(&clp->cl_lock); | |
2060 | cred = ops->get_state_renewal_cred_locked(clp); | |
2061 | spin_unlock(&clp->cl_lock); | |
2062 | if (cred == NULL) | |
2063 | return -NFS4ERR_NOENT; | |
2064 | ||
2065 | clp->cl_mig_gen++; | |
2066 | restart: | |
2067 | rcu_read_lock(); | |
2068 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { | |
2069 | int status; | |
2070 | ||
2071 | if (server->mig_gen == clp->cl_mig_gen) | |
2072 | continue; | |
2073 | server->mig_gen = clp->cl_mig_gen; | |
2074 | ||
2075 | if (!test_and_clear_bit(NFS_MIG_IN_TRANSITION, | |
2076 | &server->mig_status)) | |
2077 | continue; | |
2078 | ||
2079 | rcu_read_unlock(); | |
2080 | status = nfs4_try_migration(server, cred); | |
2081 | if (status < 0) { | |
2082 | put_rpccred(cred); | |
2083 | return status; | |
2084 | } | |
2085 | goto restart; | |
2086 | } | |
2087 | rcu_read_unlock(); | |
2088 | put_rpccred(cred); | |
2089 | return 0; | |
2090 | } | |
2091 | ||
b7f7a66e CL |
2092 | /* |
2093 | * Test each nfs_server on the clp's cl_superblocks list to see | |
2094 | * if it's moved to another server. Stop when the server no longer | |
2095 | * returns NFS4ERR_LEASE_MOVED. | |
2096 | */ | |
2097 | static int nfs4_handle_lease_moved(struct nfs_client *clp) | |
2098 | { | |
2099 | const struct nfs4_state_maintenance_ops *ops = | |
2100 | clp->cl_mvops->state_renewal_ops; | |
2101 | struct nfs_server *server; | |
2102 | struct rpc_cred *cred; | |
2103 | ||
2104 | dprintk("%s: lease moved reported on \"%s\"\n", __func__, | |
2105 | clp->cl_hostname); | |
2106 | ||
2107 | spin_lock(&clp->cl_lock); | |
2108 | cred = ops->get_state_renewal_cred_locked(clp); | |
2109 | spin_unlock(&clp->cl_lock); | |
2110 | if (cred == NULL) | |
2111 | return -NFS4ERR_NOENT; | |
2112 | ||
2113 | clp->cl_mig_gen++; | |
2114 | restart: | |
2115 | rcu_read_lock(); | |
2116 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { | |
2117 | struct inode *inode; | |
2118 | int status; | |
2119 | ||
2120 | if (server->mig_gen == clp->cl_mig_gen) | |
2121 | continue; | |
2122 | server->mig_gen = clp->cl_mig_gen; | |
2123 | ||
2124 | rcu_read_unlock(); | |
2125 | ||
2b0143b5 | 2126 | inode = d_inode(server->super->s_root); |
b7f7a66e CL |
2127 | status = nfs4_proc_fsid_present(inode, cred); |
2128 | if (status != -NFS4ERR_MOVED) | |
2129 | goto restart; /* wasn't this one */ | |
2130 | if (nfs4_try_migration(server, cred) == -NFS4ERR_LEASE_MOVED) | |
2131 | goto restart; /* there are more */ | |
2132 | goto out; | |
2133 | } | |
2134 | rcu_read_unlock(); | |
2135 | ||
2136 | out: | |
2137 | put_rpccred(cred); | |
2138 | return 0; | |
2139 | } | |
2140 | ||
05f4c350 CL |
2141 | /** |
2142 | * nfs4_discover_server_trunking - Detect server IP address trunking | |
2143 | * | |
2144 | * @clp: nfs_client under test | |
2145 | * @result: OUT: found nfs_client, or clp | |
2146 | * | |
2147 | * Returns zero or a negative errno. If zero is returned, | |
2148 | * an nfs_client pointer is planted in "result". | |
2149 | * | |
2150 | * Note: since we are invoked in process context, and | |
2151 | * not from inside the state manager, we cannot use | |
2152 | * nfs4_handle_reclaim_lease_error(). | |
2153 | */ | |
2154 | int nfs4_discover_server_trunking(struct nfs_client *clp, | |
2155 | struct nfs_client **result) | |
2156 | { | |
2157 | const struct nfs4_state_recovery_ops *ops = | |
2158 | clp->cl_mvops->reboot_recovery_ops; | |
05f4c350 CL |
2159 | struct rpc_clnt *clnt; |
2160 | struct rpc_cred *cred; | |
4edaa308 | 2161 | int i, status; |
05f4c350 CL |
2162 | |
2163 | dprintk("NFS: %s: testing '%s'\n", __func__, clp->cl_hostname); | |
2164 | ||
05f4c350 | 2165 | clnt = clp->cl_rpcclient; |
05f4c350 CL |
2166 | i = 0; |
2167 | ||
2168 | mutex_lock(&nfs_clid_init_mutex); | |
05f4c350 | 2169 | again: |
ea33e6c3 | 2170 | status = -ENOENT; |
73d8bde5 | 2171 | cred = nfs4_get_clid_cred(clp); |
05f4c350 CL |
2172 | if (cred == NULL) |
2173 | goto out_unlock; | |
2174 | ||
2175 | status = ops->detect_trunking(clp, result, cred); | |
2176 | put_rpccred(cred); | |
2177 | switch (status) { | |
2178 | case 0: | |
898fc11b TM |
2179 | case -EINTR: |
2180 | case -ERESTARTSYS: | |
05f4c350 | 2181 | break; |
05f4c350 | 2182 | case -ETIMEDOUT: |
150e7260 TM |
2183 | if (clnt->cl_softrtry) |
2184 | break; | |
2185 | case -NFS4ERR_DELAY: | |
05f4c350 CL |
2186 | case -EAGAIN: |
2187 | ssleep(1); | |
202c312d | 2188 | case -NFS4ERR_STALE_CLIENTID: |
05f4c350 CL |
2189 | dprintk("NFS: %s after status %d, retrying\n", |
2190 | __func__, status); | |
2191 | goto again; | |
4edaa308 | 2192 | case -EACCES: |
d688f7b8 CL |
2193 | if (i++ == 0) { |
2194 | nfs4_root_machine_cred(clp); | |
2195 | goto again; | |
2196 | } | |
6d769f1e | 2197 | if (clnt->cl_auth->au_flavor == RPC_AUTH_UNIX) |
4edaa308 | 2198 | break; |
05f4c350 CL |
2199 | case -NFS4ERR_CLID_INUSE: |
2200 | case -NFS4ERR_WRONGSEC: | |
6d769f1e JL |
2201 | /* No point in retrying if we already used RPC_AUTH_UNIX */ |
2202 | if (clnt->cl_auth->au_flavor == RPC_AUTH_UNIX) { | |
2203 | status = -EPERM; | |
2204 | break; | |
2205 | } | |
79d852bf | 2206 | clnt = rpc_clone_client_set_auth(clnt, RPC_AUTH_UNIX); |
05f4c350 CL |
2207 | if (IS_ERR(clnt)) { |
2208 | status = PTR_ERR(clnt); | |
2209 | break; | |
2210 | } | |
b193d59a TM |
2211 | /* Note: this is safe because we haven't yet marked the |
2212 | * client as ready, so we are the only user of | |
2213 | * clp->cl_rpcclient | |
2214 | */ | |
2215 | clnt = xchg(&clp->cl_rpcclient, clnt); | |
2216 | rpc_shutdown_client(clnt); | |
2217 | clnt = clp->cl_rpcclient; | |
05f4c350 CL |
2218 | goto again; |
2219 | ||
2220 | case -NFS4ERR_MINOR_VERS_MISMATCH: | |
2221 | status = -EPROTONOSUPPORT; | |
2222 | break; | |
2223 | ||
2224 | case -EKEYEXPIRED: | |
05f4c350 CL |
2225 | case -NFS4ERR_NOT_SAME: /* FixMe: implement recovery |
2226 | * in nfs4_exchange_id */ | |
2227 | status = -EKEYEXPIRED; | |
ea33e6c3 TM |
2228 | break; |
2229 | default: | |
2230 | pr_warn("NFS: %s unhandled error %d. Exiting with error EIO\n", | |
2231 | __func__, status); | |
2232 | status = -EIO; | |
05f4c350 CL |
2233 | } |
2234 | ||
2235 | out_unlock: | |
2236 | mutex_unlock(&nfs_clid_init_mutex); | |
05f4c350 CL |
2237 | dprintk("NFS: %s: status = %d\n", __func__, status); |
2238 | return status; | |
2239 | } | |
2240 | ||
76db6d95 | 2241 | #ifdef CONFIG_NFS_V4_1 |
9f594791 | 2242 | void nfs4_schedule_session_recovery(struct nfs4_session *session, int err) |
0400a6b0 | 2243 | { |
444f72fe TM |
2244 | struct nfs_client *clp = session->clp; |
2245 | ||
9f594791 TM |
2246 | switch (err) { |
2247 | default: | |
2248 | set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); | |
2249 | break; | |
2250 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
2251 | set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); | |
2252 | } | |
d94cbf6c | 2253 | nfs4_schedule_state_manager(clp); |
0400a6b0 | 2254 | } |
cbdabc7f | 2255 | EXPORT_SYMBOL_GPL(nfs4_schedule_session_recovery); |
0400a6b0 | 2256 | |
3f10a6af | 2257 | void nfs41_notify_server(struct nfs_client *clp) |
ac074835 TM |
2258 | { |
2259 | /* Use CHECK_LEASE to ping the server with a SEQUENCE */ | |
2260 | set_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); | |
2261 | nfs4_schedule_state_manager(clp); | |
2262 | } | |
2263 | ||
0f79fd6f TM |
2264 | static void nfs4_reset_all_state(struct nfs_client *clp) |
2265 | { | |
2266 | if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) == 0) { | |
2c820d9a | 2267 | set_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state); |
be0bfed0 | 2268 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
0f79fd6f | 2269 | nfs4_state_start_reclaim_nograce(clp); |
cc0a9843 TM |
2270 | dprintk("%s: scheduling reset of all state for server %s!\n", |
2271 | __func__, clp->cl_hostname); | |
0400a6b0 | 2272 | nfs4_schedule_state_manager(clp); |
0f79fd6f TM |
2273 | } |
2274 | } | |
2275 | ||
2276 | static void nfs41_handle_server_reboot(struct nfs_client *clp) | |
2277 | { | |
2278 | if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) == 0) { | |
2279 | nfs4_state_start_reclaim_reboot(clp); | |
cc0a9843 TM |
2280 | dprintk("%s: server %s rebooted!\n", __func__, |
2281 | clp->cl_hostname); | |
0400a6b0 | 2282 | nfs4_schedule_state_manager(clp); |
0f79fd6f TM |
2283 | } |
2284 | } | |
2285 | ||
8b895ce6 | 2286 | static void nfs41_handle_all_state_revoked(struct nfs_client *clp) |
0f79fd6f | 2287 | { |
0f79fd6f | 2288 | nfs4_reset_all_state(clp); |
cc0a9843 | 2289 | dprintk("%s: state revoked on server %s\n", __func__, clp->cl_hostname); |
0f79fd6f TM |
2290 | } |
2291 | ||
8b895ce6 TM |
2292 | static void nfs41_handle_some_state_revoked(struct nfs_client *clp) |
2293 | { | |
45870d69 | 2294 | nfs4_state_start_reclaim_nograce(clp); |
8b895ce6 TM |
2295 | nfs4_schedule_state_manager(clp); |
2296 | ||
2297 | dprintk("%s: state revoked on server %s\n", __func__, clp->cl_hostname); | |
2298 | } | |
2299 | ||
0f79fd6f TM |
2300 | static void nfs41_handle_recallable_state_revoked(struct nfs_client *clp) |
2301 | { | |
4099287f TM |
2302 | /* FIXME: For now, we destroy all layouts. */ |
2303 | pnfs_destroy_all_layouts(clp); | |
2304 | /* FIXME: For now, we test all delegations+open state+locks. */ | |
2305 | nfs41_handle_some_state_revoked(clp); | |
cc0a9843 TM |
2306 | dprintk("%s: Recallable state revoked on server %s!\n", __func__, |
2307 | clp->cl_hostname); | |
0f79fd6f TM |
2308 | } |
2309 | ||
a9e64442 | 2310 | static void nfs41_handle_backchannel_fault(struct nfs_client *clp) |
0f79fd6f | 2311 | { |
b1352905 TM |
2312 | set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); |
2313 | nfs4_schedule_state_manager(clp); | |
2314 | ||
cc0a9843 TM |
2315 | dprintk("%s: server %s declared a backchannel fault\n", __func__, |
2316 | clp->cl_hostname); | |
0f79fd6f TM |
2317 | } |
2318 | ||
a9e64442 WAA |
2319 | static void nfs41_handle_cb_path_down(struct nfs_client *clp) |
2320 | { | |
2321 | if (test_and_set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, | |
2322 | &clp->cl_state) == 0) | |
2323 | nfs4_schedule_state_manager(clp); | |
2324 | } | |
2325 | ||
0a014a44 TM |
2326 | void nfs41_handle_sequence_flag_errors(struct nfs_client *clp, u32 flags, |
2327 | bool recovery) | |
0629e370 AB |
2328 | { |
2329 | if (!flags) | |
2330 | return; | |
2c820d9a CL |
2331 | |
2332 | dprintk("%s: \"%s\" (client ID %llx) flags=0x%08x\n", | |
2333 | __func__, clp->cl_hostname, clp->cl_clientid, flags); | |
0a014a44 TM |
2334 | /* |
2335 | * If we're called from the state manager thread, then assume we're | |
2336 | * already handling the RECLAIM_NEEDED and/or STATE_REVOKED. | |
2337 | * Those flags are expected to remain set until we're done | |
2338 | * recovering (see RFC5661, section 18.46.3). | |
2339 | */ | |
2340 | if (recovery) | |
2341 | goto out_recovery; | |
2c820d9a | 2342 | |
111d489f | 2343 | if (flags & SEQ4_STATUS_RESTART_RECLAIM_NEEDED) |
0f79fd6f | 2344 | nfs41_handle_server_reboot(clp); |
8b895ce6 TM |
2345 | if (flags & (SEQ4_STATUS_EXPIRED_ALL_STATE_REVOKED)) |
2346 | nfs41_handle_all_state_revoked(clp); | |
2347 | if (flags & (SEQ4_STATUS_EXPIRED_SOME_STATE_REVOKED | | |
d1c2331e | 2348 | SEQ4_STATUS_ADMIN_STATE_REVOKED)) |
8b895ce6 | 2349 | nfs41_handle_some_state_revoked(clp); |
d1c2331e CL |
2350 | if (flags & SEQ4_STATUS_LEASE_MOVED) |
2351 | nfs4_schedule_lease_moved_recovery(clp); | |
111d489f | 2352 | if (flags & SEQ4_STATUS_RECALLABLE_STATE_REVOKED) |
0f79fd6f | 2353 | nfs41_handle_recallable_state_revoked(clp); |
0a014a44 | 2354 | out_recovery: |
a9e64442 WAA |
2355 | if (flags & SEQ4_STATUS_BACKCHANNEL_FAULT) |
2356 | nfs41_handle_backchannel_fault(clp); | |
2357 | else if (flags & (SEQ4_STATUS_CB_PATH_DOWN | | |
2358 | SEQ4_STATUS_CB_PATH_DOWN_SESSION)) | |
0f79fd6f | 2359 | nfs41_handle_cb_path_down(clp); |
0629e370 AB |
2360 | } |
2361 | ||
c3fad1b1 AA |
2362 | static int nfs4_reset_session(struct nfs_client *clp) |
2363 | { | |
848f5bda | 2364 | struct rpc_cred *cred; |
c3fad1b1 AA |
2365 | int status; |
2366 | ||
1a47e7a6 TM |
2367 | if (!nfs4_has_session(clp)) |
2368 | return 0; | |
38045412 | 2369 | nfs4_begin_drain_session(clp); |
73d8bde5 | 2370 | cred = nfs4_get_clid_cred(clp); |
848f5bda | 2371 | status = nfs4_proc_destroy_session(clp->cl_session, cred); |
c489ee29 TM |
2372 | switch (status) { |
2373 | case 0: | |
2374 | case -NFS4ERR_BADSESSION: | |
2375 | case -NFS4ERR_DEADSESSION: | |
2376 | break; | |
2377 | case -NFS4ERR_BACK_CHAN_BUSY: | |
2378 | case -NFS4ERR_DELAY: | |
2379 | set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); | |
2380 | status = 0; | |
2381 | ssleep(1); | |
2382 | goto out; | |
2383 | default: | |
f455848a | 2384 | status = nfs4_recovery_handle_error(clp, status); |
c3fad1b1 AA |
2385 | goto out; |
2386 | } | |
2387 | ||
2388 | memset(clp->cl_session->sess_id.data, 0, NFS4_MAX_SESSIONID_LEN); | |
848f5bda | 2389 | status = nfs4_proc_create_session(clp, cred); |
41f54a55 | 2390 | if (status) { |
cc0a9843 TM |
2391 | dprintk("%s: session reset failed with status %d for server %s!\n", |
2392 | __func__, status, clp->cl_hostname); | |
f2c1b510 | 2393 | status = nfs4_handle_reclaim_lease_error(clp, status); |
41f54a55 AA |
2394 | goto out; |
2395 | } | |
bda197f5 | 2396 | nfs41_finish_session_reset(clp); |
cc0a9843 TM |
2397 | dprintk("%s: session reset was successful for server %s!\n", |
2398 | __func__, clp->cl_hostname); | |
41f54a55 | 2399 | out: |
848f5bda TM |
2400 | if (cred) |
2401 | put_rpccred(cred); | |
c3fad1b1 AA |
2402 | return status; |
2403 | } | |
76db6d95 | 2404 | |
a9e64442 WAA |
2405 | static int nfs4_bind_conn_to_session(struct nfs_client *clp) |
2406 | { | |
2cf047c9 TM |
2407 | struct rpc_cred *cred; |
2408 | int ret; | |
2409 | ||
1a47e7a6 TM |
2410 | if (!nfs4_has_session(clp)) |
2411 | return 0; | |
43ac544c | 2412 | nfs4_begin_drain_session(clp); |
73d8bde5 | 2413 | cred = nfs4_get_clid_cred(clp); |
2cf047c9 TM |
2414 | ret = nfs4_proc_bind_conn_to_session(clp, cred); |
2415 | if (cred) | |
2416 | put_rpccred(cred); | |
43ac544c | 2417 | clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); |
bf674c82 TM |
2418 | switch (ret) { |
2419 | case 0: | |
cc0a9843 TM |
2420 | dprintk("%s: bind_conn_to_session was successful for server %s!\n", |
2421 | __func__, clp->cl_hostname); | |
bf674c82 TM |
2422 | break; |
2423 | case -NFS4ERR_DELAY: | |
2424 | ssleep(1); | |
2425 | set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); | |
2426 | break; | |
2427 | default: | |
2428 | return nfs4_recovery_handle_error(clp, ret); | |
2429 | } | |
2430 | return 0; | |
a9e64442 | 2431 | } |
76db6d95 | 2432 | #else /* CONFIG_NFS_V4_1 */ |
c3fad1b1 | 2433 | static int nfs4_reset_session(struct nfs_client *clp) { return 0; } |
a9e64442 WAA |
2434 | |
2435 | static int nfs4_bind_conn_to_session(struct nfs_client *clp) | |
2436 | { | |
2437 | return 0; | |
2438 | } | |
76db6d95 AA |
2439 | #endif /* CONFIG_NFS_V4_1 */ |
2440 | ||
e005e804 | 2441 | static void nfs4_state_manager(struct nfs_client *clp) |
02860014 | 2442 | { |
02860014 | 2443 | int status = 0; |
8ed27d4f | 2444 | const char *section = "", *section_sep = ""; |
02860014 | 2445 | |
02860014 | 2446 | /* Ensure exclusive access to NFSv4 state */ |
47c2199b | 2447 | do { |
2c820d9a | 2448 | if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) { |
8ed27d4f | 2449 | section = "purge state"; |
b42353ff | 2450 | status = nfs4_purge_lease(clp); |
2a6ee6aa TM |
2451 | if (status < 0) |
2452 | goto out_error; | |
b42353ff | 2453 | continue; |
2c820d9a CL |
2454 | } |
2455 | ||
b42353ff | 2456 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) { |
8ed27d4f | 2457 | section = "lease expired"; |
b79a4a1b TM |
2458 | /* We're going to have to re-establish a clientid */ |
2459 | status = nfs4_reclaim_lease(clp); | |
2a6ee6aa | 2460 | if (status < 0) |
b79a4a1b | 2461 | goto out_error; |
b42353ff | 2462 | continue; |
e598d843 TM |
2463 | } |
2464 | ||
c3fad1b1 | 2465 | /* Initialize or reset the session */ |
1a47e7a6 | 2466 | if (test_and_clear_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state)) { |
8ed27d4f | 2467 | section = "reset session"; |
4d643d1d | 2468 | status = nfs4_reset_session(clp); |
b6d408ba TM |
2469 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
2470 | continue; | |
2471 | if (status < 0) | |
76db6d95 | 2472 | goto out_error; |
76db6d95 | 2473 | } |
b6d408ba | 2474 | |
a9e64442 WAA |
2475 | /* Send BIND_CONN_TO_SESSION */ |
2476 | if (test_and_clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION, | |
1a47e7a6 | 2477 | &clp->cl_state)) { |
8ed27d4f | 2478 | section = "bind conn to session"; |
a9e64442 WAA |
2479 | status = nfs4_bind_conn_to_session(clp); |
2480 | if (status < 0) | |
2481 | goto out_error; | |
bf674c82 | 2482 | continue; |
a9e64442 WAA |
2483 | } |
2484 | ||
5df904ae TM |
2485 | if (test_and_clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state)) { |
2486 | section = "check lease"; | |
2487 | status = nfs4_check_lease(clp); | |
2488 | if (status < 0) | |
2489 | goto out_error; | |
8faaa6d5 | 2490 | continue; |
c9fdeb28 CL |
2491 | } |
2492 | ||
2493 | if (test_and_clear_bit(NFS4CLNT_MOVED, &clp->cl_state)) { | |
2494 | section = "migration"; | |
2495 | status = nfs4_handle_migration(clp); | |
2496 | if (status < 0) | |
2497 | goto out_error; | |
5df904ae TM |
2498 | } |
2499 | ||
b7f7a66e CL |
2500 | if (test_and_clear_bit(NFS4CLNT_LEASE_MOVED, &clp->cl_state)) { |
2501 | section = "lease moved"; | |
2502 | status = nfs4_handle_lease_moved(clp); | |
2503 | if (status < 0) | |
2504 | goto out_error; | |
2505 | } | |
2506 | ||
b79a4a1b | 2507 | /* First recover reboot state... */ |
e345e88a | 2508 | if (test_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) { |
8ed27d4f | 2509 | section = "reclaim reboot"; |
591d71cb | 2510 | status = nfs4_do_reclaim(clp, |
c48f4f35 | 2511 | clp->cl_mvops->reboot_recovery_ops); |
df817ba3 | 2512 | if (status == -EAGAIN) |
b6d408ba TM |
2513 | continue; |
2514 | if (status < 0) | |
2515 | goto out_error; | |
df817ba3 | 2516 | nfs4_state_end_reclaim_reboot(clp); |
02860014 TM |
2517 | } |
2518 | ||
45870d69 TM |
2519 | /* Detect expired delegations... */ |
2520 | if (test_and_clear_bit(NFS4CLNT_DELEGATION_EXPIRED, &clp->cl_state)) { | |
2521 | section = "detect expired delegations"; | |
2522 | nfs_reap_expired_delegations(clp); | |
2523 | continue; | |
2524 | } | |
2525 | ||
b79a4a1b TM |
2526 | /* Now recover expired state... */ |
2527 | if (test_and_clear_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) { | |
8ed27d4f | 2528 | section = "reclaim nograce"; |
591d71cb | 2529 | status = nfs4_do_reclaim(clp, |
c48f4f35 | 2530 | clp->cl_mvops->nograce_recovery_ops); |
df817ba3 | 2531 | if (status == -EAGAIN) |
b6d408ba TM |
2532 | continue; |
2533 | if (status < 0) | |
b79a4a1b | 2534 | goto out_error; |
1da177e4 | 2535 | } |
707fb4b3 | 2536 | |
5601a00d | 2537 | nfs4_end_drain_session(clp); |
707fb4b3 TM |
2538 | if (test_and_clear_bit(NFS4CLNT_DELEGRETURN, &clp->cl_state)) { |
2539 | nfs_client_return_marked_delegations(clp); | |
2540 | continue; | |
2541 | } | |
e005e804 TM |
2542 | |
2543 | nfs4_clear_state_manager_bit(clp); | |
f3c76491 TM |
2544 | /* Did we race with an attempt to give us more work? */ |
2545 | if (clp->cl_state == 0) | |
2546 | break; | |
2547 | if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) != 0) | |
2548 | break; | |
212bf41d | 2549 | } while (refcount_read(&clp->cl_count) > 1); |
e005e804 | 2550 | return; |
1da177e4 | 2551 | out_error: |
8ed27d4f WAA |
2552 | if (strlen(section)) |
2553 | section_sep = ": "; | |
2554 | pr_warn_ratelimited("NFS: state manager%s%s failed on NFSv4 server %s" | |
2555 | " with error %d\n", section_sep, section, | |
2556 | clp->cl_hostname, -status); | |
ffe5a830 | 2557 | ssleep(1); |
5601a00d | 2558 | nfs4_end_drain_session(clp); |
e005e804 TM |
2559 | nfs4_clear_state_manager_bit(clp); |
2560 | } | |
2561 | ||
2562 | static int nfs4_run_state_manager(void *ptr) | |
2563 | { | |
2564 | struct nfs_client *clp = ptr; | |
2565 | ||
2566 | allow_signal(SIGKILL); | |
2567 | nfs4_state_manager(clp); | |
2568 | nfs_put_client(clp); | |
2569 | module_put_and_exit(0); | |
2570 | return 0; | |
1da177e4 LT |
2571 | } |
2572 | ||
2573 | /* | |
2574 | * Local variables: | |
2575 | * c-basic-offset: 8 | |
2576 | * End: | |
2577 | */ |