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 | ||
2409a976 FI |
80 | const nfs4_stateid current_stateid = { |
81 | { | |
82 | /* Funky initialiser keeps older gcc versions happy */ | |
83 | .data = { 0x0, 0x0, 0x0, 0x1, 0 }, | |
84 | }, | |
85 | .type = NFS4_SPECIAL_STATEID_TYPE, | |
86 | }; | |
87 | ||
05f4c350 | 88 | static DEFINE_MUTEX(nfs_clid_init_mutex); |
1da177e4 | 89 | |
591d71cb | 90 | int nfs4_init_clientid(struct nfs_client *clp, struct rpc_cred *cred) |
1da177e4 | 91 | { |
fd954ae1 TM |
92 | struct nfs4_setclientid_res clid = { |
93 | .clientid = clp->cl_clientid, | |
94 | .confirm = clp->cl_confirm, | |
95 | }; | |
f738f517 CL |
96 | unsigned short port; |
97 | int status; | |
bbe0a3aa | 98 | struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); |
f738f517 | 99 | |
fd954ae1 TM |
100 | if (test_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state)) |
101 | goto do_confirm; | |
bbe0a3aa | 102 | port = nn->nfs_callback_tcpport; |
f738f517 | 103 | if (clp->cl_addr.ss_family == AF_INET6) |
29dcc16a | 104 | port = nn->nfs_callback_tcpport6; |
f738f517 | 105 | |
bb8b27e5 TM |
106 | status = nfs4_proc_setclientid(clp, NFS4_CALLBACK, port, cred, &clid); |
107 | if (status != 0) | |
108 | goto out; | |
fd954ae1 TM |
109 | clp->cl_clientid = clid.clientid; |
110 | clp->cl_confirm = clid.confirm; | |
111 | set_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); | |
112 | do_confirm: | |
bb8b27e5 TM |
113 | status = nfs4_proc_setclientid_confirm(clp, &clid, cred); |
114 | if (status != 0) | |
115 | goto out; | |
fd954ae1 | 116 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
bb8b27e5 TM |
117 | nfs4_schedule_state_renewal(clp); |
118 | out: | |
1da177e4 LT |
119 | return status; |
120 | } | |
121 | ||
05f4c350 CL |
122 | /** |
123 | * nfs40_discover_server_trunking - Detect server IP address trunking (mv0) | |
124 | * | |
125 | * @clp: nfs_client under test | |
126 | * @result: OUT: found nfs_client, or clp | |
127 | * @cred: credential to use for trunking test | |
128 | * | |
129 | * Returns zero, a negative errno, or a negative NFS4ERR status. | |
130 | * If zero is returned, an nfs_client pointer is planted in | |
131 | * "result". | |
132 | * | |
133 | * Note: The returned client may not yet be marked ready. | |
134 | */ | |
135 | int nfs40_discover_server_trunking(struct nfs_client *clp, | |
136 | struct nfs_client **result, | |
137 | struct rpc_cred *cred) | |
138 | { | |
139 | struct nfs4_setclientid_res clid = { | |
140 | .clientid = clp->cl_clientid, | |
141 | .confirm = clp->cl_confirm, | |
142 | }; | |
9f62387d | 143 | struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); |
05f4c350 CL |
144 | unsigned short port; |
145 | int status; | |
146 | ||
9f62387d | 147 | port = nn->nfs_callback_tcpport; |
05f4c350 | 148 | if (clp->cl_addr.ss_family == AF_INET6) |
9f62387d | 149 | port = nn->nfs_callback_tcpport6; |
05f4c350 CL |
150 | |
151 | status = nfs4_proc_setclientid(clp, NFS4_CALLBACK, port, cred, &clid); | |
152 | if (status != 0) | |
153 | goto out; | |
154 | clp->cl_clientid = clid.clientid; | |
155 | clp->cl_confirm = clid.confirm; | |
156 | ||
157 | status = nfs40_walk_client_list(clp, result, cred); | |
202c312d | 158 | if (status == 0) { |
05f4c350 CL |
159 | /* Sustain the lease, even if it's empty. If the clientid4 |
160 | * goes stale it's of no use for trunking discovery. */ | |
161 | nfs4_schedule_state_renewal(*result); | |
05f4c350 | 162 | } |
05f4c350 CL |
163 | out: |
164 | return status; | |
165 | } | |
166 | ||
a7b72103 | 167 | struct rpc_cred *nfs4_get_machine_cred_locked(struct nfs_client *clp) |
a2b2bb88 TM |
168 | { |
169 | struct rpc_cred *cred = NULL; | |
170 | ||
a2b2bb88 TM |
171 | if (clp->cl_machine_cred != NULL) |
172 | cred = get_rpccred(clp->cl_machine_cred); | |
a2b2bb88 TM |
173 | return cred; |
174 | } | |
175 | ||
d688f7b8 CL |
176 | static void nfs4_root_machine_cred(struct nfs_client *clp) |
177 | { | |
178 | struct rpc_cred *cred, *new; | |
179 | ||
180 | new = rpc_lookup_machine_cred(NULL); | |
181 | spin_lock(&clp->cl_lock); | |
182 | cred = clp->cl_machine_cred; | |
183 | clp->cl_machine_cred = new; | |
184 | spin_unlock(&clp->cl_lock); | |
185 | if (cred != NULL) | |
186 | put_rpccred(cred); | |
187 | } | |
188 | ||
24d292b8 CL |
189 | static struct rpc_cred * |
190 | nfs4_get_renew_cred_server_locked(struct nfs_server *server) | |
b4454fe1 | 191 | { |
24d292b8 | 192 | struct rpc_cred *cred = NULL; |
b4454fe1 | 193 | struct nfs4_state_owner *sp; |
9f958ab8 | 194 | struct rb_node *pos; |
b4454fe1 | 195 | |
24d292b8 CL |
196 | for (pos = rb_first(&server->state_owners); |
197 | pos != NULL; | |
198 | pos = rb_next(pos)) { | |
199 | sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); | |
b4454fe1 TM |
200 | if (list_empty(&sp->so_states)) |
201 | continue; | |
202 | cred = get_rpccred(sp->so_cred); | |
203 | break; | |
204 | } | |
205 | return cred; | |
206 | } | |
207 | ||
24d292b8 CL |
208 | /** |
209 | * nfs4_get_renew_cred_locked - Acquire credential for a renew operation | |
210 | * @clp: client state handle | |
211 | * | |
212 | * Returns an rpc_cred with reference count bumped, or NULL. | |
213 | * Caller must hold clp->cl_lock. | |
214 | */ | |
215 | struct rpc_cred *nfs4_get_renew_cred_locked(struct nfs_client *clp) | |
216 | { | |
217 | struct rpc_cred *cred = NULL; | |
218 | struct nfs_server *server; | |
219 | ||
e49a29bd SP |
220 | /* Use machine credentials if available */ |
221 | cred = nfs4_get_machine_cred_locked(clp); | |
222 | if (cred != NULL) | |
223 | goto out; | |
224 | ||
24d292b8 CL |
225 | rcu_read_lock(); |
226 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { | |
227 | cred = nfs4_get_renew_cred_server_locked(server); | |
228 | if (cred != NULL) | |
229 | break; | |
230 | } | |
231 | rcu_read_unlock(); | |
e49a29bd SP |
232 | |
233 | out: | |
24d292b8 CL |
234 | return cred; |
235 | } | |
236 | ||
62f288a0 | 237 | static void nfs4_end_drain_slot_table(struct nfs4_slot_table *tbl) |
9dfdf404 | 238 | { |
774d5f14 | 239 | if (test_and_clear_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state)) { |
961a828d | 240 | spin_lock(&tbl->slot_tbl_lock); |
b75ad4cd | 241 | nfs41_wake_slot_table(tbl); |
961a828d | 242 | spin_unlock(&tbl->slot_tbl_lock); |
689cf5c1 | 243 | } |
9dfdf404 RL |
244 | } |
245 | ||
62f288a0 AA |
246 | static void nfs4_end_drain_session(struct nfs_client *clp) |
247 | { | |
248 | struct nfs4_session *ses = clp->cl_session; | |
249 | ||
2cf8bca8 CL |
250 | if (clp->cl_slot_tbl) { |
251 | nfs4_end_drain_slot_table(clp->cl_slot_tbl); | |
252 | return; | |
253 | } | |
254 | ||
62f288a0 AA |
255 | if (ses != NULL) { |
256 | nfs4_end_drain_slot_table(&ses->bc_slot_table); | |
257 | nfs4_end_drain_slot_table(&ses->fc_slot_table); | |
258 | } | |
259 | } | |
260 | ||
774d5f14 | 261 | static int nfs4_drain_slot_tbl(struct nfs4_slot_table *tbl) |
9dfdf404 | 262 | { |
774d5f14 | 263 | set_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state); |
9dfdf404 | 264 | spin_lock(&tbl->slot_tbl_lock); |
b6bf6e7d | 265 | if (tbl->highest_used_slotid != NFS4_NO_SLOT) { |
16735d02 | 266 | reinit_completion(&tbl->complete); |
9dfdf404 | 267 | spin_unlock(&tbl->slot_tbl_lock); |
42acd021 | 268 | return wait_for_completion_interruptible(&tbl->complete); |
9dfdf404 RL |
269 | } |
270 | spin_unlock(&tbl->slot_tbl_lock); | |
271 | return 0; | |
272 | } | |
273 | ||
42acd021 AA |
274 | static int nfs4_begin_drain_session(struct nfs_client *clp) |
275 | { | |
276 | struct nfs4_session *ses = clp->cl_session; | |
8aafd2fd | 277 | int ret; |
42acd021 | 278 | |
2cf8bca8 CL |
279 | if (clp->cl_slot_tbl) |
280 | return nfs4_drain_slot_tbl(clp->cl_slot_tbl); | |
281 | ||
42acd021 | 282 | /* back channel */ |
774d5f14 | 283 | ret = nfs4_drain_slot_tbl(&ses->bc_slot_table); |
42acd021 AA |
284 | if (ret) |
285 | return ret; | |
286 | /* fore channel */ | |
774d5f14 | 287 | return nfs4_drain_slot_tbl(&ses->fc_slot_table); |
42acd021 AA |
288 | } |
289 | ||
c9fdeb28 CL |
290 | #if defined(CONFIG_NFS_V4_1) |
291 | ||
2cf8bca8 CL |
292 | static int nfs41_setup_state_renewal(struct nfs_client *clp) |
293 | { | |
294 | int status; | |
295 | struct nfs_fsinfo fsinfo; | |
fb10fb67 | 296 | unsigned long now; |
2cf8bca8 CL |
297 | |
298 | if (!test_bit(NFS_CS_CHECK_LEASE_TIME, &clp->cl_res_state)) { | |
299 | nfs4_schedule_state_renewal(clp); | |
300 | return 0; | |
301 | } | |
302 | ||
fb10fb67 | 303 | now = jiffies; |
2cf8bca8 CL |
304 | status = nfs4_proc_get_lease_time(clp, &fsinfo); |
305 | if (status == 0) { | |
fb10fb67 | 306 | nfs4_set_lease_period(clp, fsinfo.lease_time * HZ, now); |
2cf8bca8 CL |
307 | nfs4_schedule_state_renewal(clp); |
308 | } | |
309 | ||
310 | return status; | |
311 | } | |
312 | ||
bda197f5 TM |
313 | static void nfs41_finish_session_reset(struct nfs_client *clp) |
314 | { | |
315 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); | |
316 | clear_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); | |
317 | /* create_session negotiated new slot table */ | |
bda197f5 TM |
318 | clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); |
319 | nfs41_setup_state_renewal(clp); | |
320 | } | |
321 | ||
4d643d1d AA |
322 | int nfs41_init_clientid(struct nfs_client *clp, struct rpc_cred *cred) |
323 | { | |
324 | int status; | |
325 | ||
fd954ae1 TM |
326 | if (test_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state)) |
327 | goto do_confirm; | |
4d643d1d | 328 | status = nfs4_proc_exchange_id(clp, cred); |
9430fb6b RL |
329 | if (status != 0) |
330 | goto out; | |
fd954ae1 TM |
331 | set_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
332 | do_confirm: | |
848f5bda | 333 | status = nfs4_proc_create_session(clp, cred); |
9430fb6b RL |
334 | if (status != 0) |
335 | goto out; | |
bda197f5 | 336 | nfs41_finish_session_reset(clp); |
9430fb6b RL |
337 | nfs_mark_client_ready(clp, NFS_CS_READY); |
338 | out: | |
4d643d1d AA |
339 | return status; |
340 | } | |
341 | ||
05f4c350 CL |
342 | /** |
343 | * nfs41_discover_server_trunking - Detect server IP address trunking (mv1) | |
344 | * | |
345 | * @clp: nfs_client under test | |
346 | * @result: OUT: found nfs_client, or clp | |
347 | * @cred: credential to use for trunking test | |
348 | * | |
349 | * Returns NFS4_OK, a negative errno, or a negative NFS4ERR status. | |
350 | * If NFS4_OK is returned, an nfs_client pointer is planted in | |
351 | * "result". | |
352 | * | |
353 | * Note: The returned client may not yet be marked ready. | |
354 | */ | |
355 | int nfs41_discover_server_trunking(struct nfs_client *clp, | |
356 | struct nfs_client **result, | |
357 | struct rpc_cred *cred) | |
358 | { | |
359 | int status; | |
360 | ||
361 | status = nfs4_proc_exchange_id(clp, cred); | |
362 | if (status != NFS4_OK) | |
363 | return status; | |
364 | ||
48d66b97 TM |
365 | status = nfs41_walk_client_list(clp, result, cred); |
366 | if (status < 0) | |
367 | return status; | |
368 | if (clp != *result) | |
369 | return 0; | |
370 | ||
8dcbec6d CL |
371 | /* |
372 | * Purge state if the client id was established in a prior | |
373 | * instance and the client id could not have arrived on the | |
374 | * server via Transparent State Migration. | |
375 | */ | |
376 | if (clp->cl_exchange_flags & EXCHGID4_FLAG_CONFIRMED_R) { | |
377 | if (!test_bit(NFS_CS_TSM_POSSIBLE, &clp->cl_flags)) | |
378 | set_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state); | |
379 | else | |
380 | set_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); | |
381 | } | |
48d66b97 TM |
382 | nfs4_schedule_state_manager(clp); |
383 | status = nfs_wait_client_init_complete(clp); | |
384 | if (status < 0) | |
385 | nfs_put_client(clp); | |
386 | return status; | |
05f4c350 CL |
387 | } |
388 | ||
b4b82607 AA |
389 | #endif /* CONFIG_NFS_V4_1 */ |
390 | ||
24d292b8 | 391 | /** |
73d8bde5 | 392 | * nfs4_get_clid_cred - Acquire credential for a setclientid operation |
24d292b8 CL |
393 | * @clp: client state handle |
394 | * | |
395 | * Returns an rpc_cred with reference count bumped, or NULL. | |
396 | */ | |
73d8bde5 | 397 | struct rpc_cred *nfs4_get_clid_cred(struct nfs_client *clp) |
24d292b8 | 398 | { |
a2b2bb88 | 399 | struct rpc_cred *cred; |
286d7d6a | 400 | |
6dc9d57a TM |
401 | spin_lock(&clp->cl_lock); |
402 | cred = nfs4_get_machine_cred_locked(clp); | |
24d292b8 | 403 | spin_unlock(&clp->cl_lock); |
a2b2bb88 | 404 | return cred; |
286d7d6a TM |
405 | } |
406 | ||
1da177e4 | 407 | static struct nfs4_state_owner * |
24d292b8 | 408 | nfs4_find_state_owner_locked(struct nfs_server *server, struct rpc_cred *cred) |
1da177e4 | 409 | { |
24d292b8 | 410 | struct rb_node **p = &server->state_owners.rb_node, |
9f958ab8 | 411 | *parent = NULL; |
414adf14 | 412 | struct nfs4_state_owner *sp; |
1da177e4 | 413 | |
9f958ab8 TM |
414 | while (*p != NULL) { |
415 | parent = *p; | |
24d292b8 | 416 | sp = rb_entry(parent, struct nfs4_state_owner, so_server_node); |
9f958ab8 TM |
417 | |
418 | if (cred < sp->so_cred) | |
419 | p = &parent->rb_left; | |
420 | else if (cred > sp->so_cred) | |
421 | p = &parent->rb_right; | |
422 | else { | |
0aaaf5c4 CL |
423 | if (!list_empty(&sp->so_lru)) |
424 | list_del_init(&sp->so_lru); | |
9f958ab8 | 425 | atomic_inc(&sp->so_count); |
414adf14 | 426 | return sp; |
9f958ab8 | 427 | } |
1da177e4 | 428 | } |
414adf14 | 429 | return NULL; |
1da177e4 LT |
430 | } |
431 | ||
9f958ab8 | 432 | static struct nfs4_state_owner * |
24d292b8 | 433 | nfs4_insert_state_owner_locked(struct nfs4_state_owner *new) |
9f958ab8 | 434 | { |
24d292b8 CL |
435 | struct nfs_server *server = new->so_server; |
436 | struct rb_node **p = &server->state_owners.rb_node, | |
9f958ab8 TM |
437 | *parent = NULL; |
438 | struct nfs4_state_owner *sp; | |
439 | ||
440 | while (*p != NULL) { | |
441 | parent = *p; | |
24d292b8 | 442 | sp = rb_entry(parent, struct nfs4_state_owner, so_server_node); |
9f958ab8 TM |
443 | |
444 | if (new->so_cred < sp->so_cred) | |
445 | p = &parent->rb_left; | |
446 | else if (new->so_cred > sp->so_cred) | |
447 | p = &parent->rb_right; | |
448 | else { | |
0aaaf5c4 CL |
449 | if (!list_empty(&sp->so_lru)) |
450 | list_del_init(&sp->so_lru); | |
9f958ab8 TM |
451 | atomic_inc(&sp->so_count); |
452 | return sp; | |
453 | } | |
454 | } | |
24d292b8 CL |
455 | rb_link_node(&new->so_server_node, parent, p); |
456 | rb_insert_color(&new->so_server_node, &server->state_owners); | |
9f958ab8 TM |
457 | return new; |
458 | } | |
459 | ||
460 | static void | |
24d292b8 | 461 | nfs4_remove_state_owner_locked(struct nfs4_state_owner *sp) |
9f958ab8 | 462 | { |
24d292b8 CL |
463 | struct nfs_server *server = sp->so_server; |
464 | ||
465 | if (!RB_EMPTY_NODE(&sp->so_server_node)) | |
466 | rb_erase(&sp->so_server_node, &server->state_owners); | |
9f958ab8 TM |
467 | } |
468 | ||
7ba127ab TM |
469 | static void |
470 | nfs4_init_seqid_counter(struct nfs_seqid_counter *sc) | |
471 | { | |
95b72eb0 | 472 | sc->create_time = ktime_get(); |
7ba127ab TM |
473 | sc->flags = 0; |
474 | sc->counter = 0; | |
475 | spin_lock_init(&sc->lock); | |
476 | INIT_LIST_HEAD(&sc->list); | |
477 | rpc_init_wait_queue(&sc->wait, "Seqid_waitqueue"); | |
478 | } | |
479 | ||
480 | static void | |
481 | nfs4_destroy_seqid_counter(struct nfs_seqid_counter *sc) | |
482 | { | |
483 | rpc_destroy_wait_queue(&sc->wait); | |
484 | } | |
485 | ||
1da177e4 LT |
486 | /* |
487 | * nfs4_alloc_state_owner(): this is called on the OPEN or CREATE path to | |
488 | * create a new state_owner. | |
489 | * | |
490 | */ | |
491 | static struct nfs4_state_owner * | |
d1e284d5 TM |
492 | nfs4_alloc_state_owner(struct nfs_server *server, |
493 | struct rpc_cred *cred, | |
494 | gfp_t gfp_flags) | |
1da177e4 LT |
495 | { |
496 | struct nfs4_state_owner *sp; | |
497 | ||
d1e284d5 | 498 | sp = kzalloc(sizeof(*sp), gfp_flags); |
1da177e4 LT |
499 | if (!sp) |
500 | return NULL; | |
aae5730e MW |
501 | sp->so_seqid.owner_id = ida_simple_get(&server->openowner_id, 0, 0, |
502 | gfp_flags); | |
503 | if (sp->so_seqid.owner_id < 0) { | |
504 | kfree(sp); | |
505 | return NULL; | |
506 | } | |
d1e284d5 TM |
507 | sp->so_server = server; |
508 | sp->so_cred = get_rpccred(cred); | |
ec073428 | 509 | spin_lock_init(&sp->so_lock); |
1da177e4 | 510 | INIT_LIST_HEAD(&sp->so_states); |
7ba127ab | 511 | nfs4_init_seqid_counter(&sp->so_seqid); |
1da177e4 | 512 | atomic_set(&sp->so_count, 1); |
0aaaf5c4 | 513 | INIT_LIST_HEAD(&sp->so_lru); |
c137afab | 514 | seqcount_init(&sp->so_reclaim_seqcount); |
65b62a29 | 515 | mutex_init(&sp->so_delegreturn_mutex); |
1da177e4 LT |
516 | return sp; |
517 | } | |
518 | ||
1d2e88e7 | 519 | static void |
86cfb041 | 520 | nfs4_reset_state_owner(struct nfs4_state_owner *sp) |
1da177e4 | 521 | { |
86cfb041 N |
522 | /* This state_owner is no longer usable, but must |
523 | * remain in place so that state recovery can find it | |
524 | * and the opens associated with it. | |
525 | * It may also be used for new 'open' request to | |
526 | * return a delegation to the server. | |
527 | * So update the 'create_time' so that it looks like | |
528 | * a new state_owner. This will cause the server to | |
529 | * request an OPEN_CONFIRM to start a new sequence. | |
530 | */ | |
531 | sp->so_seqid.create_time = ktime_get(); | |
1da177e4 LT |
532 | } |
533 | ||
0aaaf5c4 CL |
534 | static void nfs4_free_state_owner(struct nfs4_state_owner *sp) |
535 | { | |
7ba127ab | 536 | nfs4_destroy_seqid_counter(&sp->so_seqid); |
0aaaf5c4 | 537 | put_rpccred(sp->so_cred); |
aae5730e | 538 | ida_simple_remove(&sp->so_server->openowner_id, sp->so_seqid.owner_id); |
0aaaf5c4 CL |
539 | kfree(sp); |
540 | } | |
541 | ||
542 | static void nfs4_gc_state_owners(struct nfs_server *server) | |
543 | { | |
544 | struct nfs_client *clp = server->nfs_client; | |
545 | struct nfs4_state_owner *sp, *tmp; | |
546 | unsigned long time_min, time_max; | |
547 | LIST_HEAD(doomed); | |
548 | ||
549 | spin_lock(&clp->cl_lock); | |
550 | time_max = jiffies; | |
551 | time_min = (long)time_max - (long)clp->cl_lease_time; | |
552 | list_for_each_entry_safe(sp, tmp, &server->state_owners_lru, so_lru) { | |
553 | /* NB: LRU is sorted so that oldest is at the head */ | |
554 | if (time_in_range(sp->so_expires, time_min, time_max)) | |
555 | break; | |
556 | list_move(&sp->so_lru, &doomed); | |
557 | nfs4_remove_state_owner_locked(sp); | |
558 | } | |
559 | spin_unlock(&clp->cl_lock); | |
560 | ||
561 | list_for_each_entry_safe(sp, tmp, &doomed, so_lru) { | |
562 | list_del(&sp->so_lru); | |
563 | nfs4_free_state_owner(sp); | |
564 | } | |
565 | } | |
566 | ||
24d292b8 CL |
567 | /** |
568 | * nfs4_get_state_owner - Look up a state owner given a credential | |
569 | * @server: nfs_server to search | |
570 | * @cred: RPC credential to match | |
571 | * | |
572 | * Returns a pointer to an instantiated nfs4_state_owner struct, or NULL. | |
573 | */ | |
574 | struct nfs4_state_owner *nfs4_get_state_owner(struct nfs_server *server, | |
d1e284d5 TM |
575 | struct rpc_cred *cred, |
576 | gfp_t gfp_flags) | |
1da177e4 | 577 | { |
7539bbab | 578 | struct nfs_client *clp = server->nfs_client; |
1da177e4 LT |
579 | struct nfs4_state_owner *sp, *new; |
580 | ||
1da177e4 | 581 | spin_lock(&clp->cl_lock); |
24d292b8 | 582 | sp = nfs4_find_state_owner_locked(server, cred); |
1da177e4 | 583 | spin_unlock(&clp->cl_lock); |
1da177e4 | 584 | if (sp != NULL) |
0aaaf5c4 | 585 | goto out; |
d1e284d5 | 586 | new = nfs4_alloc_state_owner(server, cred, gfp_flags); |
9f958ab8 | 587 | if (new == NULL) |
0aaaf5c4 | 588 | goto out; |
aae5730e MW |
589 | spin_lock(&clp->cl_lock); |
590 | sp = nfs4_insert_state_owner_locked(new); | |
591 | spin_unlock(&clp->cl_lock); | |
d1e284d5 TM |
592 | if (sp != new) |
593 | nfs4_free_state_owner(new); | |
0aaaf5c4 CL |
594 | out: |
595 | nfs4_gc_state_owners(server); | |
9f958ab8 | 596 | return sp; |
1da177e4 LT |
597 | } |
598 | ||
24d292b8 CL |
599 | /** |
600 | * nfs4_put_state_owner - Release a nfs4_state_owner | |
601 | * @sp: state owner data to release | |
7bf97bc2 TM |
602 | * |
603 | * Note that we keep released state owners on an LRU | |
604 | * list. | |
605 | * This caches valid state owners so that they can be | |
606 | * reused, to avoid the OPEN_CONFIRM on minor version 0. | |
607 | * It also pins the uniquifier of dropped state owners for | |
608 | * a while, to ensure that those state owner names are | |
609 | * never reused. | |
24d292b8 | 610 | */ |
1da177e4 LT |
611 | void nfs4_put_state_owner(struct nfs4_state_owner *sp) |
612 | { | |
0aaaf5c4 CL |
613 | struct nfs_server *server = sp->so_server; |
614 | struct nfs_client *clp = server->nfs_client; | |
1da177e4 LT |
615 | |
616 | if (!atomic_dec_and_lock(&sp->so_count, &clp->cl_lock)) | |
617 | return; | |
0aaaf5c4 | 618 | |
7bf97bc2 TM |
619 | sp->so_expires = jiffies; |
620 | list_add_tail(&sp->so_lru, &server->state_owners_lru); | |
621 | spin_unlock(&clp->cl_lock); | |
0aaaf5c4 CL |
622 | } |
623 | ||
624 | /** | |
625 | * nfs4_purge_state_owners - Release all cached state owners | |
626 | * @server: nfs_server with cached state owners to release | |
627 | * | |
628 | * Called at umount time. Remaining state owners will be on | |
629 | * the LRU with ref count of zero. | |
630 | */ | |
631 | void nfs4_purge_state_owners(struct nfs_server *server) | |
632 | { | |
633 | struct nfs_client *clp = server->nfs_client; | |
634 | struct nfs4_state_owner *sp, *tmp; | |
635 | LIST_HEAD(doomed); | |
636 | ||
637 | spin_lock(&clp->cl_lock); | |
638 | list_for_each_entry_safe(sp, tmp, &server->state_owners_lru, so_lru) { | |
639 | list_move(&sp->so_lru, &doomed); | |
640 | nfs4_remove_state_owner_locked(sp); | |
641 | } | |
1da177e4 | 642 | spin_unlock(&clp->cl_lock); |
0aaaf5c4 CL |
643 | |
644 | list_for_each_entry_safe(sp, tmp, &doomed, so_lru) { | |
645 | list_del(&sp->so_lru); | |
646 | nfs4_free_state_owner(sp); | |
647 | } | |
1da177e4 LT |
648 | } |
649 | ||
650 | static struct nfs4_state * | |
651 | nfs4_alloc_open_state(void) | |
652 | { | |
653 | struct nfs4_state *state; | |
654 | ||
8535b2be | 655 | state = kzalloc(sizeof(*state), GFP_NOFS); |
1da177e4 LT |
656 | if (!state) |
657 | return NULL; | |
ace9fad4 | 658 | refcount_set(&state->count, 1); |
1da177e4 | 659 | INIT_LIST_HEAD(&state->lock_states); |
8d0a8a9d | 660 | spin_lock_init(&state->state_lock); |
8bda4e4c | 661 | seqlock_init(&state->seqlock); |
c9399f21 | 662 | init_waitqueue_head(&state->waitq); |
1da177e4 LT |
663 | return state; |
664 | } | |
665 | ||
4cecb76f | 666 | void |
dc0b027d | 667 | nfs4_state_set_mode_locked(struct nfs4_state *state, fmode_t fmode) |
4cecb76f | 668 | { |
dc0b027d | 669 | if (state->state == fmode) |
4cecb76f TM |
670 | return; |
671 | /* NB! List reordering - see the reclaim code for why. */ | |
dc0b027d TM |
672 | if ((fmode & FMODE_WRITE) != (state->state & FMODE_WRITE)) { |
673 | if (fmode & FMODE_WRITE) | |
4cecb76f TM |
674 | list_move(&state->open_states, &state->owner->so_states); |
675 | else | |
676 | list_move_tail(&state->open_states, &state->owner->so_states); | |
677 | } | |
dc0b027d | 678 | state->state = fmode; |
4cecb76f TM |
679 | } |
680 | ||
1da177e4 LT |
681 | static struct nfs4_state * |
682 | __nfs4_find_state_byowner(struct inode *inode, struct nfs4_state_owner *owner) | |
683 | { | |
684 | struct nfs_inode *nfsi = NFS_I(inode); | |
685 | struct nfs4_state *state; | |
686 | ||
9ae075fd | 687 | list_for_each_entry_rcu(state, &nfsi->open_states, inode_states) { |
1c816efa | 688 | if (state->owner != owner) |
1da177e4 | 689 | continue; |
5d422301 TM |
690 | if (!nfs4_valid_open_stateid(state)) |
691 | continue; | |
ace9fad4 | 692 | if (refcount_inc_not_zero(&state->count)) |
1da177e4 | 693 | return state; |
1da177e4 LT |
694 | } |
695 | return NULL; | |
696 | } | |
697 | ||
1da177e4 LT |
698 | static void |
699 | nfs4_free_open_state(struct nfs4_state *state) | |
700 | { | |
9ae075fd | 701 | kfree_rcu(state, rcu_head); |
1da177e4 LT |
702 | } |
703 | ||
704 | struct nfs4_state * | |
705 | nfs4_get_open_state(struct inode *inode, struct nfs4_state_owner *owner) | |
706 | { | |
707 | struct nfs4_state *state, *new; | |
708 | struct nfs_inode *nfsi = NFS_I(inode); | |
709 | ||
9ae075fd | 710 | rcu_read_lock(); |
1da177e4 | 711 | state = __nfs4_find_state_byowner(inode, owner); |
9ae075fd | 712 | rcu_read_unlock(); |
1da177e4 LT |
713 | if (state) |
714 | goto out; | |
715 | new = nfs4_alloc_open_state(); | |
ec073428 | 716 | spin_lock(&owner->so_lock); |
1da177e4 LT |
717 | spin_lock(&inode->i_lock); |
718 | state = __nfs4_find_state_byowner(inode, owner); | |
719 | if (state == NULL && new != NULL) { | |
720 | state = new; | |
1da177e4 LT |
721 | state->owner = owner; |
722 | atomic_inc(&owner->so_count); | |
9ae075fd | 723 | list_add_rcu(&state->inode_states, &nfsi->open_states); |
0444d76a DC |
724 | ihold(inode); |
725 | state->inode = inode; | |
1da177e4 | 726 | spin_unlock(&inode->i_lock); |
ec073428 TM |
727 | /* Note: The reclaim code dictates that we add stateless |
728 | * and read-only stateids to the end of the list */ | |
729 | list_add_tail(&state->open_states, &owner->so_states); | |
730 | spin_unlock(&owner->so_lock); | |
1da177e4 LT |
731 | } else { |
732 | spin_unlock(&inode->i_lock); | |
ec073428 | 733 | spin_unlock(&owner->so_lock); |
1da177e4 LT |
734 | if (new) |
735 | nfs4_free_open_state(new); | |
736 | } | |
737 | out: | |
738 | return state; | |
739 | } | |
740 | ||
1da177e4 LT |
741 | void nfs4_put_open_state(struct nfs4_state *state) |
742 | { | |
743 | struct inode *inode = state->inode; | |
744 | struct nfs4_state_owner *owner = state->owner; | |
745 | ||
ace9fad4 | 746 | if (!refcount_dec_and_lock(&state->count, &owner->so_lock)) |
1da177e4 | 747 | return; |
ec073428 | 748 | spin_lock(&inode->i_lock); |
9ae075fd | 749 | list_del_rcu(&state->inode_states); |
1da177e4 | 750 | list_del(&state->open_states); |
ec073428 TM |
751 | spin_unlock(&inode->i_lock); |
752 | spin_unlock(&owner->so_lock); | |
1da177e4 | 753 | iput(inode); |
1da177e4 LT |
754 | nfs4_free_open_state(state); |
755 | nfs4_put_state_owner(owner); | |
756 | } | |
757 | ||
758 | /* | |
83c9d41e | 759 | * Close the current file. |
1da177e4 | 760 | */ |
643168c2 | 761 | static void __nfs4_close(struct nfs4_state *state, |
8535b2be | 762 | fmode_t fmode, gfp_t gfp_mask, int wait) |
1da177e4 | 763 | { |
1da177e4 | 764 | struct nfs4_state_owner *owner = state->owner; |
003707c7 | 765 | int call_close = 0; |
dc0b027d | 766 | fmode_t newstate; |
1da177e4 LT |
767 | |
768 | atomic_inc(&owner->so_count); | |
1da177e4 | 769 | /* Protect against nfs4_find_state() */ |
ec073428 | 770 | spin_lock(&owner->so_lock); |
dc0b027d | 771 | switch (fmode & (FMODE_READ | FMODE_WRITE)) { |
e7616923 TM |
772 | case FMODE_READ: |
773 | state->n_rdonly--; | |
774 | break; | |
775 | case FMODE_WRITE: | |
776 | state->n_wronly--; | |
777 | break; | |
778 | case FMODE_READ|FMODE_WRITE: | |
779 | state->n_rdwr--; | |
780 | } | |
003707c7 | 781 | newstate = FMODE_READ|FMODE_WRITE; |
e7616923 | 782 | if (state->n_rdwr == 0) { |
003707c7 | 783 | if (state->n_rdonly == 0) { |
e7616923 | 784 | newstate &= ~FMODE_READ; |
003707c7 TM |
785 | call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags); |
786 | call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); | |
787 | } | |
788 | if (state->n_wronly == 0) { | |
e7616923 | 789 | newstate &= ~FMODE_WRITE; |
003707c7 TM |
790 | call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags); |
791 | call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); | |
792 | } | |
793 | if (newstate == 0) | |
794 | clear_bit(NFS_DELEGATED_STATE, &state->flags); | |
e7616923 | 795 | } |
003707c7 | 796 | nfs4_state_set_mode_locked(state, newstate); |
ec073428 | 797 | spin_unlock(&owner->so_lock); |
4cecb76f | 798 | |
003707c7 | 799 | if (!call_close) { |
b39e625b TM |
800 | nfs4_put_open_state(state); |
801 | nfs4_put_state_owner(owner); | |
1f7977c1 TM |
802 | } else |
803 | nfs4_do_close(state, gfp_mask, wait); | |
a49c3c77 TM |
804 | } |
805 | ||
643168c2 | 806 | void nfs4_close_state(struct nfs4_state *state, fmode_t fmode) |
a49c3c77 | 807 | { |
643168c2 | 808 | __nfs4_close(state, fmode, GFP_NOFS, 0); |
a49c3c77 TM |
809 | } |
810 | ||
643168c2 | 811 | void nfs4_close_sync(struct nfs4_state *state, fmode_t fmode) |
a49c3c77 | 812 | { |
643168c2 | 813 | __nfs4_close(state, fmode, GFP_KERNEL, 1); |
1da177e4 LT |
814 | } |
815 | ||
816 | /* | |
817 | * Search the state->lock_states for an existing lock_owner | |
3f8f2548 N |
818 | * that is compatible with either of the given owners. |
819 | * If the second is non-zero, then the first refers to a Posix-lock | |
820 | * owner (current->files) and the second refers to a flock/OFD | |
821 | * owner (struct file*). In that case, prefer a match for the first | |
822 | * owner. | |
823 | * If both sorts of locks are held on the one file we cannot know | |
824 | * which stateid was intended to be used, so a "correct" choice cannot | |
825 | * be made. Failing that, a "consistent" choice is preferable. The | |
826 | * consistent choice we make is to prefer the first owner, that of a | |
827 | * Posix lock. | |
1da177e4 LT |
828 | */ |
829 | static struct nfs4_lock_state * | |
8d424431 N |
830 | __nfs4_find_lock_state(struct nfs4_state *state, |
831 | fl_owner_t fl_owner, fl_owner_t fl_owner2) | |
1da177e4 | 832 | { |
3f8f2548 | 833 | struct nfs4_lock_state *pos, *ret = NULL; |
1da177e4 | 834 | list_for_each_entry(pos, &state->lock_states, ls_locks) { |
3f8f2548 N |
835 | if (pos->ls_owner == fl_owner) { |
836 | ret = pos; | |
837 | break; | |
838 | } | |
839 | if (pos->ls_owner == fl_owner2) | |
840 | ret = pos; | |
1da177e4 | 841 | } |
3f8f2548 | 842 | if (ret) |
194bc1f4 | 843 | refcount_inc(&ret->ls_count); |
3f8f2548 | 844 | return ret; |
1da177e4 LT |
845 | } |
846 | ||
1da177e4 LT |
847 | /* |
848 | * Return a compatible lock_state. If no initialized lock_state structure | |
849 | * exists, return an uninitialized one. | |
850 | * | |
1da177e4 | 851 | */ |
8003d3c4 | 852 | static struct nfs4_lock_state *nfs4_alloc_lock_state(struct nfs4_state *state, fl_owner_t fl_owner) |
1da177e4 LT |
853 | { |
854 | struct nfs4_lock_state *lsp; | |
24d292b8 | 855 | struct nfs_server *server = state->owner->so_server; |
1da177e4 | 856 | |
8535b2be | 857 | lsp = kzalloc(sizeof(*lsp), GFP_NOFS); |
1da177e4 LT |
858 | if (lsp == NULL) |
859 | return NULL; | |
7ba127ab | 860 | nfs4_init_seqid_counter(&lsp->ls_seqid); |
194bc1f4 | 861 | refcount_set(&lsp->ls_count, 1); |
b64aec8d | 862 | lsp->ls_state = state; |
8003d3c4 | 863 | lsp->ls_owner = fl_owner; |
48c22eb2 TM |
864 | lsp->ls_seqid.owner_id = ida_simple_get(&server->lockowner_id, 0, 0, GFP_NOFS); |
865 | if (lsp->ls_seqid.owner_id < 0) | |
d2d7ce28 | 866 | goto out_free; |
8d0a8a9d | 867 | INIT_LIST_HEAD(&lsp->ls_locks); |
1da177e4 | 868 | return lsp; |
d2d7ce28 TM |
869 | out_free: |
870 | kfree(lsp); | |
871 | return NULL; | |
1da177e4 LT |
872 | } |
873 | ||
5ae67c4f | 874 | void nfs4_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp) |
9f958ab8 | 875 | { |
48c22eb2 | 876 | ida_simple_remove(&server->lockowner_id, lsp->ls_seqid.owner_id); |
7ba127ab | 877 | nfs4_destroy_seqid_counter(&lsp->ls_seqid); |
9f958ab8 TM |
878 | kfree(lsp); |
879 | } | |
880 | ||
1da177e4 LT |
881 | /* |
882 | * Return a compatible lock_state. If no initialized lock_state structure | |
883 | * exists, return an uninitialized one. | |
884 | * | |
1da177e4 | 885 | */ |
8003d3c4 | 886 | static struct nfs4_lock_state *nfs4_get_lock_state(struct nfs4_state *state, fl_owner_t owner) |
1da177e4 | 887 | { |
8d0a8a9d | 888 | struct nfs4_lock_state *lsp, *new = NULL; |
1da177e4 | 889 | |
8d0a8a9d TM |
890 | for(;;) { |
891 | spin_lock(&state->state_lock); | |
68e33bd6 | 892 | lsp = __nfs4_find_lock_state(state, owner, NULL); |
8d0a8a9d TM |
893 | if (lsp != NULL) |
894 | break; | |
895 | if (new != NULL) { | |
8d0a8a9d TM |
896 | list_add(&new->ls_locks, &state->lock_states); |
897 | set_bit(LK_STATE_IN_USE, &state->flags); | |
898 | lsp = new; | |
899 | new = NULL; | |
900 | break; | |
901 | } | |
902 | spin_unlock(&state->state_lock); | |
8003d3c4 | 903 | new = nfs4_alloc_lock_state(state, owner); |
8d0a8a9d TM |
904 | if (new == NULL) |
905 | return NULL; | |
906 | } | |
907 | spin_unlock(&state->state_lock); | |
9f958ab8 | 908 | if (new != NULL) |
5ae67c4f | 909 | nfs4_free_lock_state(state->owner->so_server, new); |
1da177e4 LT |
910 | return lsp; |
911 | } | |
912 | ||
913 | /* | |
8d0a8a9d TM |
914 | * Release reference to lock_state, and free it if we see that |
915 | * it is no longer in use | |
1da177e4 | 916 | */ |
faf5f49c | 917 | void nfs4_put_lock_state(struct nfs4_lock_state *lsp) |
1da177e4 | 918 | { |
c8b2d0bf | 919 | struct nfs_server *server; |
8d0a8a9d | 920 | struct nfs4_state *state; |
1da177e4 | 921 | |
8d0a8a9d TM |
922 | if (lsp == NULL) |
923 | return; | |
924 | state = lsp->ls_state; | |
194bc1f4 | 925 | if (!refcount_dec_and_lock(&lsp->ls_count, &state->state_lock)) |
8d0a8a9d TM |
926 | return; |
927 | list_del(&lsp->ls_locks); | |
928 | if (list_empty(&state->lock_states)) | |
929 | clear_bit(LK_STATE_IN_USE, &state->flags); | |
930 | spin_unlock(&state->state_lock); | |
0c0e0d3c JL |
931 | server = state->owner->so_server; |
932 | if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) { | |
933 | struct nfs_client *clp = server->nfs_client; | |
934 | ||
935 | clp->cl_mvops->free_lock_state(server, lsp); | |
936 | } else | |
c8b2d0bf | 937 | nfs4_free_lock_state(server, lsp); |
1da177e4 LT |
938 | } |
939 | ||
8d0a8a9d | 940 | static void nfs4_fl_copy_lock(struct file_lock *dst, struct file_lock *src) |
1da177e4 | 941 | { |
8d0a8a9d | 942 | struct nfs4_lock_state *lsp = src->fl_u.nfs4_fl.owner; |
1da177e4 | 943 | |
8d0a8a9d | 944 | dst->fl_u.nfs4_fl.owner = lsp; |
194bc1f4 | 945 | refcount_inc(&lsp->ls_count); |
8d0a8a9d | 946 | } |
1da177e4 | 947 | |
8d0a8a9d | 948 | static void nfs4_fl_release_lock(struct file_lock *fl) |
1da177e4 | 949 | { |
8d0a8a9d | 950 | nfs4_put_lock_state(fl->fl_u.nfs4_fl.owner); |
1da177e4 LT |
951 | } |
952 | ||
6aed6285 | 953 | static const struct file_lock_operations nfs4_fl_lock_ops = { |
8d0a8a9d TM |
954 | .fl_copy_lock = nfs4_fl_copy_lock, |
955 | .fl_release_private = nfs4_fl_release_lock, | |
956 | }; | |
957 | ||
958 | int nfs4_set_lock_state(struct nfs4_state *state, struct file_lock *fl) | |
1da177e4 | 959 | { |
8d0a8a9d TM |
960 | struct nfs4_lock_state *lsp; |
961 | ||
962 | if (fl->fl_ops != NULL) | |
963 | return 0; | |
8003d3c4 | 964 | lsp = nfs4_get_lock_state(state, fl->fl_owner); |
8d0a8a9d TM |
965 | if (lsp == NULL) |
966 | return -ENOMEM; | |
967 | fl->fl_u.nfs4_fl.owner = lsp; | |
968 | fl->fl_ops = &nfs4_fl_lock_ops; | |
969 | return 0; | |
1da177e4 LT |
970 | } |
971 | ||
5521abfd TM |
972 | static int nfs4_copy_lock_stateid(nfs4_stateid *dst, |
973 | struct nfs4_state *state, | |
17393475 | 974 | const struct nfs_lock_context *l_ctx) |
1da177e4 | 975 | { |
8d0a8a9d | 976 | struct nfs4_lock_state *lsp; |
8d424431 | 977 | fl_owner_t fl_owner, fl_flock_owner; |
5521abfd | 978 | int ret = -ENOENT; |
1da177e4 | 979 | |
17393475 | 980 | if (l_ctx == NULL) |
2a369153 TM |
981 | goto out; |
982 | ||
8d0a8a9d | 983 | if (test_bit(LK_STATE_IN_USE, &state->flags) == 0) |
4fc8796d | 984 | goto out; |
1da177e4 | 985 | |
d51fdb87 | 986 | fl_owner = l_ctx->lockowner; |
8d424431 N |
987 | fl_flock_owner = l_ctx->open_context->flock_owner; |
988 | ||
8d0a8a9d | 989 | spin_lock(&state->state_lock); |
8d424431 | 990 | lsp = __nfs4_find_lock_state(state, fl_owner, fl_flock_owner); |
ef1820f9 N |
991 | if (lsp && test_bit(NFS_LOCK_LOST, &lsp->ls_flags)) |
992 | ret = -EIO; | |
993 | else if (lsp != NULL && test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0) { | |
f597c537 | 994 | nfs4_stateid_copy(dst, &lsp->ls_stateid); |
5521abfd | 995 | ret = 0; |
4fc8796d | 996 | } |
8d0a8a9d | 997 | spin_unlock(&state->state_lock); |
1da177e4 | 998 | nfs4_put_lock_state(lsp); |
4fc8796d TM |
999 | out: |
1000 | return ret; | |
1001 | } | |
1002 | ||
12f275cd TM |
1003 | bool nfs4_refresh_open_stateid(nfs4_stateid *dst, struct nfs4_state *state) |
1004 | { | |
1005 | bool ret; | |
1006 | int seq; | |
1007 | ||
1008 | do { | |
1009 | ret = false; | |
1010 | seq = read_seqbegin(&state->seqlock); | |
1011 | if (nfs4_state_match_open_stateid_other(state, dst)) { | |
1012 | dst->seqid = state->open_stateid.seqid; | |
1013 | ret = true; | |
1014 | } | |
1015 | } while (read_seqretry(&state->seqlock, seq)); | |
1016 | return ret; | |
1017 | } | |
1018 | ||
c82bac6f | 1019 | bool nfs4_copy_open_stateid(nfs4_stateid *dst, struct nfs4_state *state) |
4fc8796d | 1020 | { |
c82bac6f | 1021 | bool ret; |
92b40e93 | 1022 | const nfs4_stateid *src; |
4fc8796d TM |
1023 | int seq; |
1024 | ||
1025 | do { | |
c82bac6f | 1026 | ret = false; |
92b40e93 | 1027 | src = &zero_stateid; |
4fc8796d | 1028 | seq = read_seqbegin(&state->seqlock); |
c82bac6f | 1029 | if (test_bit(NFS_OPEN_STATE, &state->flags)) { |
92b40e93 | 1030 | src = &state->open_stateid; |
c82bac6f TM |
1031 | ret = true; |
1032 | } | |
92b40e93 | 1033 | nfs4_stateid_copy(dst, src); |
4fc8796d | 1034 | } while (read_seqretry(&state->seqlock, seq)); |
c82bac6f | 1035 | return ret; |
4fc8796d TM |
1036 | } |
1037 | ||
1038 | /* | |
1039 | * Byte-range lock aware utility to initialize the stateid of read/write | |
1040 | * requests. | |
1041 | */ | |
abf4e13c | 1042 | int nfs4_select_rw_stateid(struct nfs4_state *state, |
17393475 | 1043 | fmode_t fmode, const struct nfs_lock_context *l_ctx, |
abf4e13c | 1044 | nfs4_stateid *dst, struct rpc_cred **cred) |
4fc8796d | 1045 | { |
abf4e13c TM |
1046 | int ret; |
1047 | ||
7ebeb7fe TM |
1048 | if (!nfs4_valid_open_stateid(state)) |
1049 | return -EIO; | |
abf4e13c TM |
1050 | if (cred != NULL) |
1051 | *cred = NULL; | |
17393475 | 1052 | ret = nfs4_copy_lock_stateid(dst, state, l_ctx); |
ef1820f9 N |
1053 | if (ret == -EIO) |
1054 | /* A lost lock - don't even consider delegations */ | |
1055 | goto out; | |
146d70ca | 1056 | /* returns true if delegation stateid found and copied */ |
abf4e13c | 1057 | if (nfs4_copy_delegation_stateid(state->inode, fmode, dst, cred)) { |
146d70ca | 1058 | ret = 0; |
5521abfd | 1059 | goto out; |
146d70ca | 1060 | } |
5521abfd | 1061 | if (ret != -ENOENT) |
ef1820f9 N |
1062 | /* nfs4_copy_delegation_stateid() didn't over-write |
1063 | * dst, so it still has the lock stateid which we now | |
1064 | * choose to use. | |
1065 | */ | |
5521abfd | 1066 | goto out; |
927864cd TM |
1067 | nfs4_copy_open_stateid(dst, state); |
1068 | ret = 0; | |
5521abfd | 1069 | out: |
3b66486c TM |
1070 | if (nfs_server_capable(state->inode, NFS_CAP_STATEID_NFSV41)) |
1071 | dst->seqid = 0; | |
5521abfd | 1072 | return ret; |
1da177e4 LT |
1073 | } |
1074 | ||
8535b2be | 1075 | struct nfs_seqid *nfs_alloc_seqid(struct nfs_seqid_counter *counter, gfp_t gfp_mask) |
cee54fc9 | 1076 | { |
cee54fc9 TM |
1077 | struct nfs_seqid *new; |
1078 | ||
8535b2be | 1079 | new = kmalloc(sizeof(*new), gfp_mask); |
badc76dd TM |
1080 | if (new == NULL) |
1081 | return ERR_PTR(-ENOMEM); | |
1082 | new->sequence = counter; | |
1083 | INIT_LIST_HEAD(&new->list); | |
1084 | new->task = NULL; | |
cee54fc9 TM |
1085 | return new; |
1086 | } | |
1087 | ||
72211dbe | 1088 | void nfs_release_seqid(struct nfs_seqid *seqid) |
1da177e4 | 1089 | { |
4601df20 | 1090 | struct nfs_seqid_counter *sequence; |
cee54fc9 | 1091 | |
a6796419 | 1092 | if (seqid == NULL || list_empty(&seqid->list)) |
4601df20 TM |
1093 | return; |
1094 | sequence = seqid->sequence; | |
1095 | spin_lock(&sequence->lock); | |
1096 | list_del_init(&seqid->list); | |
1097 | if (!list_empty(&sequence->list)) { | |
1098 | struct nfs_seqid *next; | |
1099 | ||
1100 | next = list_first_entry(&sequence->list, | |
1101 | struct nfs_seqid, list); | |
1102 | rpc_wake_up_queued_task(&sequence->wait, next->task); | |
2f74c0a0 | 1103 | } |
4601df20 | 1104 | spin_unlock(&sequence->lock); |
72211dbe TM |
1105 | } |
1106 | ||
1107 | void nfs_free_seqid(struct nfs_seqid *seqid) | |
1108 | { | |
1109 | nfs_release_seqid(seqid); | |
cee54fc9 | 1110 | kfree(seqid); |
1da177e4 LT |
1111 | } |
1112 | ||
1113 | /* | |
cee54fc9 TM |
1114 | * Increment the seqid if the OPEN/OPEN_DOWNGRADE/CLOSE succeeded, or |
1115 | * failed with a seqid incrementing error - | |
16a6ddc7 | 1116 | * see comments nfs4.h:seqid_mutating_error() |
cee54fc9 | 1117 | */ |
88d90939 | 1118 | static void nfs_increment_seqid(int status, struct nfs_seqid *seqid) |
cee54fc9 TM |
1119 | { |
1120 | switch (status) { | |
1121 | case 0: | |
1122 | break; | |
1123 | case -NFS4ERR_BAD_SEQID: | |
6f43ddcc TM |
1124 | if (seqid->sequence->flags & NFS_SEQID_CONFIRMED) |
1125 | return; | |
9a3ba432 | 1126 | pr_warn_ratelimited("NFS: v4 server returned a bad" |
497799e7 DM |
1127 | " sequence-id error on an" |
1128 | " unconfirmed sequence %p!\n", | |
6f43ddcc | 1129 | seqid->sequence); |
cee54fc9 TM |
1130 | case -NFS4ERR_STALE_CLIENTID: |
1131 | case -NFS4ERR_STALE_STATEID: | |
1132 | case -NFS4ERR_BAD_STATEID: | |
1133 | case -NFS4ERR_BADXDR: | |
1134 | case -NFS4ERR_RESOURCE: | |
1135 | case -NFS4ERR_NOFILEHANDLE: | |
406dab84 | 1136 | case -NFS4ERR_MOVED: |
cee54fc9 TM |
1137 | /* Non-seqid mutating errors */ |
1138 | return; | |
1139 | }; | |
1140 | /* | |
1141 | * Note: no locking needed as we are guaranteed to be first | |
1142 | * on the sequence list | |
1143 | */ | |
1144 | seqid->sequence->counter++; | |
1145 | } | |
1146 | ||
1147 | void nfs_increment_open_seqid(int status, struct nfs_seqid *seqid) | |
1148 | { | |
a6796419 TM |
1149 | struct nfs4_state_owner *sp; |
1150 | ||
1151 | if (seqid == NULL) | |
1152 | return; | |
34dc1ad7 | 1153 | |
a6796419 | 1154 | sp = container_of(seqid->sequence, struct nfs4_state_owner, so_seqid); |
34dc1ad7 | 1155 | if (status == -NFS4ERR_BAD_SEQID) |
86cfb041 | 1156 | nfs4_reset_state_owner(sp); |
a6796419 | 1157 | if (!nfs4_has_session(sp->so_server->nfs_client)) |
34dc1ad7 | 1158 | nfs_increment_seqid(status, seqid); |
cee54fc9 TM |
1159 | } |
1160 | ||
1161 | /* | |
cee54fc9 TM |
1162 | * Increment the seqid if the LOCK/LOCKU succeeded, or |
1163 | * failed with a seqid incrementing error - | |
16a6ddc7 | 1164 | * see comments nfs4.h:seqid_mutating_error() |
cee54fc9 TM |
1165 | */ |
1166 | void nfs_increment_lock_seqid(int status, struct nfs_seqid *seqid) | |
1167 | { | |
a6796419 TM |
1168 | if (seqid != NULL) |
1169 | nfs_increment_seqid(status, seqid); | |
cee54fc9 TM |
1170 | } |
1171 | ||
1172 | int nfs_wait_on_sequence(struct nfs_seqid *seqid, struct rpc_task *task) | |
1173 | { | |
a6796419 | 1174 | struct nfs_seqid_counter *sequence; |
cee54fc9 TM |
1175 | int status = 0; |
1176 | ||
a6796419 TM |
1177 | if (seqid == NULL) |
1178 | goto out; | |
1179 | sequence = seqid->sequence; | |
cee54fc9 | 1180 | spin_lock(&sequence->lock); |
4601df20 | 1181 | seqid->task = task; |
2f74c0a0 TM |
1182 | if (list_empty(&seqid->list)) |
1183 | list_add_tail(&seqid->list, &sequence->list); | |
1184 | if (list_first_entry(&sequence->list, struct nfs_seqid, list) == seqid) | |
1185 | goto unlock; | |
5d00837b | 1186 | rpc_sleep_on(&sequence->wait, task, NULL); |
2f74c0a0 TM |
1187 | status = -EAGAIN; |
1188 | unlock: | |
cee54fc9 | 1189 | spin_unlock(&sequence->lock); |
a6796419 | 1190 | out: |
cee54fc9 | 1191 | return status; |
1da177e4 LT |
1192 | } |
1193 | ||
e005e804 | 1194 | static int nfs4_run_state_manager(void *); |
1da177e4 | 1195 | |
e005e804 | 1196 | static void nfs4_clear_state_manager_bit(struct nfs_client *clp) |
433fbe4c | 1197 | { |
4e857c58 | 1198 | smp_mb__before_atomic(); |
e005e804 | 1199 | clear_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state); |
4e857c58 | 1200 | smp_mb__after_atomic(); |
e005e804 | 1201 | wake_up_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING); |
433fbe4c TM |
1202 | rpc_wake_up(&clp->cl_rpcwaitq); |
1203 | } | |
1204 | ||
1da177e4 | 1205 | /* |
e005e804 | 1206 | * Schedule the nfs_client asynchronous state management routine |
1da177e4 | 1207 | */ |
b0d3ded1 | 1208 | void nfs4_schedule_state_manager(struct nfs_client *clp) |
1da177e4 | 1209 | { |
5043e900 | 1210 | struct task_struct *task; |
2446ab60 | 1211 | char buf[INET6_ADDRSTRLEN + sizeof("-manager") + 1]; |
1da177e4 | 1212 | |
e005e804 TM |
1213 | if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) != 0) |
1214 | return; | |
5043e900 | 1215 | __module_get(THIS_MODULE); |
212bf41d | 1216 | refcount_inc(&clp->cl_count); |
2446ab60 TM |
1217 | |
1218 | /* The rcu_read_lock() is not strictly necessary, as the state | |
1219 | * manager is the only thread that ever changes the rpc_xprt | |
1220 | * after it's initialized. At this point, we're single threaded. */ | |
1221 | rcu_read_lock(); | |
1222 | snprintf(buf, sizeof(buf), "%s-manager", | |
1223 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)); | |
1224 | rcu_read_unlock(); | |
f170168b | 1225 | task = kthread_run(nfs4_run_state_manager, clp, "%s", buf); |
2446ab60 TM |
1226 | if (IS_ERR(task)) { |
1227 | printk(KERN_ERR "%s: kthread_run: %ld\n", | |
1228 | __func__, PTR_ERR(task)); | |
1229 | nfs4_clear_state_manager_bit(clp); | |
1230 | nfs_put_client(clp); | |
1231 | module_put(THIS_MODULE); | |
1232 | } | |
1da177e4 LT |
1233 | } |
1234 | ||
1235 | /* | |
0400a6b0 | 1236 | * Schedule a lease recovery attempt |
1da177e4 | 1237 | */ |
0400a6b0 | 1238 | void nfs4_schedule_lease_recovery(struct nfs_client *clp) |
1da177e4 LT |
1239 | { |
1240 | if (!clp) | |
1241 | return; | |
e598d843 TM |
1242 | if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
1243 | set_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); | |
cc0a9843 TM |
1244 | dprintk("%s: scheduling lease recovery for server %s\n", __func__, |
1245 | clp->cl_hostname); | |
e005e804 | 1246 | nfs4_schedule_state_manager(clp); |
1da177e4 | 1247 | } |
9cb81968 | 1248 | EXPORT_SYMBOL_GPL(nfs4_schedule_lease_recovery); |
1da177e4 | 1249 | |
c9fdeb28 CL |
1250 | /** |
1251 | * nfs4_schedule_migration_recovery - trigger migration recovery | |
1252 | * | |
1253 | * @server: FSID that is migrating | |
1254 | * | |
1255 | * Returns zero if recovery has started, otherwise a negative NFS4ERR | |
1256 | * value is returned. | |
1257 | */ | |
1258 | int nfs4_schedule_migration_recovery(const struct nfs_server *server) | |
1259 | { | |
1260 | struct nfs_client *clp = server->nfs_client; | |
1261 | ||
1262 | if (server->fh_expire_type != NFS4_FH_PERSISTENT) { | |
1263 | pr_err("NFS: volatile file handles not supported (server %s)\n", | |
1264 | clp->cl_hostname); | |
1265 | return -NFS4ERR_IO; | |
1266 | } | |
1267 | ||
1268 | if (test_bit(NFS_MIG_FAILED, &server->mig_status)) | |
1269 | return -NFS4ERR_IO; | |
1270 | ||
1271 | dprintk("%s: scheduling migration recovery for (%llx:%llx) on %s\n", | |
1272 | __func__, | |
1273 | (unsigned long long)server->fsid.major, | |
1274 | (unsigned long long)server->fsid.minor, | |
1275 | clp->cl_hostname); | |
1276 | ||
1277 | set_bit(NFS_MIG_IN_TRANSITION, | |
1278 | &((struct nfs_server *)server)->mig_status); | |
1279 | set_bit(NFS4CLNT_MOVED, &clp->cl_state); | |
1280 | ||
1281 | nfs4_schedule_state_manager(clp); | |
1282 | return 0; | |
1283 | } | |
1284 | EXPORT_SYMBOL_GPL(nfs4_schedule_migration_recovery); | |
1285 | ||
b7f7a66e CL |
1286 | /** |
1287 | * nfs4_schedule_lease_moved_recovery - start lease-moved recovery | |
1288 | * | |
1289 | * @clp: server to check for moved leases | |
1290 | * | |
1291 | */ | |
1292 | void nfs4_schedule_lease_moved_recovery(struct nfs_client *clp) | |
1293 | { | |
1294 | dprintk("%s: scheduling lease-moved recovery for client ID %llx on %s\n", | |
1295 | __func__, clp->cl_clientid, clp->cl_hostname); | |
1296 | ||
1297 | set_bit(NFS4CLNT_LEASE_MOVED, &clp->cl_state); | |
1298 | nfs4_schedule_state_manager(clp); | |
1299 | } | |
1300 | EXPORT_SYMBOL_GPL(nfs4_schedule_lease_moved_recovery); | |
1301 | ||
33021279 TM |
1302 | int nfs4_wait_clnt_recover(struct nfs_client *clp) |
1303 | { | |
1304 | int res; | |
1305 | ||
1306 | might_sleep(); | |
1307 | ||
212bf41d | 1308 | refcount_inc(&clp->cl_count); |
74316201 N |
1309 | res = wait_on_bit_action(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING, |
1310 | nfs_wait_bit_killable, TASK_KILLABLE); | |
33021279 | 1311 | if (res) |
0625c2dd | 1312 | goto out; |
33021279 | 1313 | if (clp->cl_cons_state < 0) |
0625c2dd CL |
1314 | res = clp->cl_cons_state; |
1315 | out: | |
1316 | nfs_put_client(clp); | |
1317 | return res; | |
33021279 TM |
1318 | } |
1319 | ||
1320 | int nfs4_client_recover_expired_lease(struct nfs_client *clp) | |
1321 | { | |
1322 | unsigned int loop; | |
1323 | int ret; | |
1324 | ||
1325 | for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) { | |
1326 | ret = nfs4_wait_clnt_recover(clp); | |
1327 | if (ret != 0) | |
1328 | break; | |
1329 | if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) && | |
1330 | !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state)) | |
1331 | break; | |
1332 | nfs4_schedule_state_manager(clp); | |
1333 | ret = -EIO; | |
1334 | } | |
1335 | return ret; | |
1336 | } | |
1337 | ||
ad1e3968 TM |
1338 | /* |
1339 | * nfs40_handle_cb_pathdown - return all delegations after NFS4ERR_CB_PATH_DOWN | |
1340 | * @clp: client to process | |
1341 | * | |
1342 | * Set the NFS4CLNT_LEASE_EXPIRED state in order to force a | |
1343 | * resend of the SETCLIENTID and hence re-establish the | |
1344 | * callback channel. Then return all existing delegations. | |
1345 | */ | |
1346 | static void nfs40_handle_cb_pathdown(struct nfs_client *clp) | |
1347 | { | |
1348 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1349 | nfs_expire_all_delegations(clp); | |
cc0a9843 TM |
1350 | dprintk("%s: handling CB_PATHDOWN recovery for server %s\n", __func__, |
1351 | clp->cl_hostname); | |
ad1e3968 TM |
1352 | } |
1353 | ||
042b60be TM |
1354 | void nfs4_schedule_path_down_recovery(struct nfs_client *clp) |
1355 | { | |
ad1e3968 | 1356 | nfs40_handle_cb_pathdown(clp); |
042b60be TM |
1357 | nfs4_schedule_state_manager(clp); |
1358 | } | |
1359 | ||
f9feab1e | 1360 | static int nfs4_state_mark_reclaim_reboot(struct nfs_client *clp, struct nfs4_state *state) |
b79a4a1b TM |
1361 | { |
1362 | ||
7ebeb7fe TM |
1363 | if (!nfs4_valid_open_stateid(state)) |
1364 | return 0; | |
b79a4a1b TM |
1365 | set_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); |
1366 | /* Don't recover state that expired before the reboot */ | |
1367 | if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) { | |
1368 | clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); | |
1369 | return 0; | |
1370 | } | |
7eff03ae | 1371 | set_bit(NFS_OWNER_RECLAIM_REBOOT, &state->owner->so_flags); |
b79a4a1b TM |
1372 | set_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state); |
1373 | return 1; | |
1374 | } | |
1375 | ||
4f14c194 | 1376 | int nfs4_state_mark_reclaim_nograce(struct nfs_client *clp, struct nfs4_state *state) |
b79a4a1b | 1377 | { |
7ebeb7fe TM |
1378 | if (!nfs4_valid_open_stateid(state)) |
1379 | return 0; | |
b79a4a1b TM |
1380 | set_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags); |
1381 | clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); | |
7eff03ae | 1382 | set_bit(NFS_OWNER_RECLAIM_NOGRACE, &state->owner->so_flags); |
b79a4a1b TM |
1383 | set_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state); |
1384 | return 1; | |
1385 | } | |
1386 | ||
5d422301 | 1387 | int nfs4_schedule_stateid_recovery(const struct nfs_server *server, struct nfs4_state *state) |
0400a6b0 TM |
1388 | { |
1389 | struct nfs_client *clp = server->nfs_client; | |
1390 | ||
7ebeb7fe | 1391 | if (!nfs4_state_mark_reclaim_nograce(clp, state)) |
5d422301 | 1392 | return -EBADF; |
994b15b9 TM |
1393 | nfs_inode_find_delegation_state_and_recover(state->inode, |
1394 | &state->stateid); | |
cc0a9843 TM |
1395 | dprintk("%s: scheduling stateid recovery for server %s\n", __func__, |
1396 | clp->cl_hostname); | |
0400a6b0 | 1397 | nfs4_schedule_state_manager(clp); |
5d422301 | 1398 | return 0; |
0400a6b0 | 1399 | } |
9cb81968 | 1400 | EXPORT_SYMBOL_GPL(nfs4_schedule_stateid_recovery); |
0400a6b0 | 1401 | |
6c2d8f8d TM |
1402 | static struct nfs4_lock_state * |
1403 | nfs_state_find_lock_state_by_stateid(struct nfs4_state *state, | |
1404 | const nfs4_stateid *stateid) | |
1405 | { | |
1406 | struct nfs4_lock_state *pos; | |
1407 | ||
1408 | list_for_each_entry(pos, &state->lock_states, ls_locks) { | |
1409 | if (!test_bit(NFS_LOCK_INITIALIZED, &pos->ls_flags)) | |
1410 | continue; | |
1411 | if (nfs4_stateid_match_other(&pos->ls_stateid, stateid)) | |
1412 | return pos; | |
1413 | } | |
1414 | return NULL; | |
1415 | } | |
1416 | ||
1417 | static bool nfs_state_lock_state_matches_stateid(struct nfs4_state *state, | |
1418 | const nfs4_stateid *stateid) | |
1419 | { | |
1420 | bool found = false; | |
1421 | ||
1422 | if (test_bit(LK_STATE_IN_USE, &state->flags)) { | |
1423 | spin_lock(&state->state_lock); | |
1424 | if (nfs_state_find_lock_state_by_stateid(state, stateid)) | |
1425 | found = true; | |
1426 | spin_unlock(&state->state_lock); | |
1427 | } | |
1428 | return found; | |
1429 | } | |
1430 | ||
a1d0b5ee TM |
1431 | void nfs_inode_find_state_and_recover(struct inode *inode, |
1432 | const nfs4_stateid *stateid) | |
1433 | { | |
1434 | struct nfs_client *clp = NFS_SERVER(inode)->nfs_client; | |
1435 | struct nfs_inode *nfsi = NFS_I(inode); | |
1436 | struct nfs_open_context *ctx; | |
1437 | struct nfs4_state *state; | |
1438 | bool found = false; | |
1439 | ||
0de43976 TM |
1440 | rcu_read_lock(); |
1441 | list_for_each_entry_rcu(ctx, &nfsi->open_files, list) { | |
a1d0b5ee TM |
1442 | state = ctx->state; |
1443 | if (state == NULL) | |
1444 | continue; | |
7ebeb7fe TM |
1445 | if (nfs4_stateid_match_other(&state->stateid, stateid) && |
1446 | nfs4_state_mark_reclaim_nograce(clp, state)) { | |
6c2d8f8d | 1447 | found = true; |
a1d0b5ee | 1448 | continue; |
6c2d8f8d | 1449 | } |
46280d9d TM |
1450 | if (nfs4_stateid_match_other(&state->open_stateid, stateid) && |
1451 | nfs4_state_mark_reclaim_nograce(clp, state)) { | |
1452 | found = true; | |
1453 | continue; | |
1454 | } | |
7ebeb7fe TM |
1455 | if (nfs_state_lock_state_matches_stateid(state, stateid) && |
1456 | nfs4_state_mark_reclaim_nograce(clp, state)) | |
6c2d8f8d | 1457 | found = true; |
a1d0b5ee | 1458 | } |
0de43976 | 1459 | rcu_read_unlock(); |
6c2d8f8d TM |
1460 | |
1461 | nfs_inode_find_delegation_state_and_recover(inode, stateid); | |
a1d0b5ee TM |
1462 | if (found) |
1463 | nfs4_schedule_state_manager(clp); | |
1464 | } | |
1465 | ||
c58c8441 TM |
1466 | static void nfs4_state_mark_open_context_bad(struct nfs4_state *state) |
1467 | { | |
1468 | struct inode *inode = state->inode; | |
1469 | struct nfs_inode *nfsi = NFS_I(inode); | |
1470 | struct nfs_open_context *ctx; | |
1471 | ||
0de43976 TM |
1472 | rcu_read_lock(); |
1473 | list_for_each_entry_rcu(ctx, &nfsi->open_files, list) { | |
c58c8441 TM |
1474 | if (ctx->state != state) |
1475 | continue; | |
1476 | set_bit(NFS_CONTEXT_BAD, &ctx->flags); | |
1477 | } | |
0de43976 | 1478 | rcu_read_unlock(); |
c58c8441 TM |
1479 | } |
1480 | ||
5d422301 TM |
1481 | static void nfs4_state_mark_recovery_failed(struct nfs4_state *state, int error) |
1482 | { | |
1483 | set_bit(NFS_STATE_RECOVERY_FAILED, &state->flags); | |
c58c8441 | 1484 | nfs4_state_mark_open_context_bad(state); |
5d422301 TM |
1485 | } |
1486 | ||
a1d0b5ee | 1487 | |
02860014 | 1488 | static int nfs4_reclaim_locks(struct nfs4_state *state, const struct nfs4_state_recovery_ops *ops) |
1da177e4 LT |
1489 | { |
1490 | struct inode *inode = state->inode; | |
19e03c57 | 1491 | struct nfs_inode *nfsi = NFS_I(inode); |
1da177e4 | 1492 | struct file_lock *fl; |
dce2630c | 1493 | struct nfs4_lock_state *lsp; |
1da177e4 | 1494 | int status = 0; |
5263e31e | 1495 | struct file_lock_context *flctx = inode->i_flctx; |
bd61e0a9 | 1496 | struct list_head *list; |
1da177e4 | 1497 | |
bd61e0a9 | 1498 | if (flctx == NULL) |
3f09df70 TM |
1499 | return 0; |
1500 | ||
bd61e0a9 JL |
1501 | list = &flctx->flc_posix; |
1502 | ||
3f09df70 | 1503 | /* Guard against delegation returns and new lock/unlock calls */ |
19e03c57 | 1504 | down_write(&nfsi->rwsem); |
6109c850 | 1505 | spin_lock(&flctx->flc_lock); |
bd61e0a9 JL |
1506 | restart: |
1507 | list_for_each_entry(fl, list, fl_list) { | |
5263e31e JL |
1508 | if (nfs_file_open_context(fl->fl_file)->state != state) |
1509 | continue; | |
6109c850 | 1510 | spin_unlock(&flctx->flc_lock); |
5263e31e JL |
1511 | status = ops->recover_lock(state, fl); |
1512 | switch (status) { | |
1513 | case 0: | |
1514 | break; | |
1515 | case -ESTALE: | |
1516 | case -NFS4ERR_ADMIN_REVOKED: | |
1517 | case -NFS4ERR_STALE_STATEID: | |
1518 | case -NFS4ERR_BAD_STATEID: | |
1519 | case -NFS4ERR_EXPIRED: | |
1520 | case -NFS4ERR_NO_GRACE: | |
1521 | case -NFS4ERR_STALE_CLIENTID: | |
1522 | case -NFS4ERR_BADSESSION: | |
1523 | case -NFS4ERR_BADSLOT: | |
1524 | case -NFS4ERR_BAD_HIGH_SLOT: | |
1525 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
1526 | goto out; | |
1527 | default: | |
1528 | pr_err("NFS: %s: unhandled error %d\n", | |
1529 | __func__, status); | |
01e03bdc | 1530 | /* Fall through */ |
5263e31e JL |
1531 | case -ENOMEM: |
1532 | case -NFS4ERR_DENIED: | |
1533 | case -NFS4ERR_RECLAIM_BAD: | |
1534 | case -NFS4ERR_RECLAIM_CONFLICT: | |
dce2630c N |
1535 | lsp = fl->fl_u.nfs4_fl.owner; |
1536 | if (lsp) | |
1537 | set_bit(NFS_LOCK_LOST, &lsp->ls_flags); | |
5263e31e JL |
1538 | status = 0; |
1539 | } | |
6109c850 | 1540 | spin_lock(&flctx->flc_lock); |
5263e31e | 1541 | } |
bd61e0a9 JL |
1542 | if (list == &flctx->flc_posix) { |
1543 | list = &flctx->flc_flock; | |
1544 | goto restart; | |
1545 | } | |
6109c850 | 1546 | spin_unlock(&flctx->flc_lock); |
965b5d67 | 1547 | out: |
19e03c57 | 1548 | up_write(&nfsi->rwsem); |
1da177e4 LT |
1549 | return status; |
1550 | } | |
1551 | ||
80f42368 AS |
1552 | #ifdef CONFIG_NFS_V4_2 |
1553 | static void nfs42_complete_copies(struct nfs4_state_owner *sp, struct nfs4_state *state) | |
1554 | { | |
1555 | struct nfs4_copy_state *copy; | |
1556 | ||
1557 | if (!test_bit(NFS_CLNT_DST_SSC_COPY_STATE, &state->flags)) | |
1558 | return; | |
1559 | ||
1560 | spin_lock(&sp->so_server->nfs_client->cl_lock); | |
1561 | list_for_each_entry(copy, &sp->so_server->ss_copies, copies) { | |
1562 | if (nfs4_stateid_match_other(&state->stateid, ©->parent_state->stateid)) | |
1563 | continue; | |
1564 | copy->flags = 1; | |
1565 | complete(©->completion); | |
1566 | break; | |
1567 | } | |
1568 | spin_unlock(&sp->so_server->nfs_client->cl_lock); | |
1569 | } | |
1570 | #else /* !CONFIG_NFS_V4_2 */ | |
1571 | static inline void nfs42_complete_copies(struct nfs4_state_owner *sp, | |
1572 | struct nfs4_state *state) | |
1573 | { | |
1574 | } | |
1575 | #endif /* CONFIG_NFS_V4_2 */ | |
1576 | ||
cb7a8384 AS |
1577 | static int __nfs4_reclaim_open_state(struct nfs4_state_owner *sp, struct nfs4_state *state, |
1578 | const struct nfs4_state_recovery_ops *ops) | |
1579 | { | |
1580 | struct nfs4_lock_state *lock; | |
1581 | int status; | |
1582 | ||
1583 | status = ops->recover_open(sp, state); | |
1584 | if (status < 0) | |
1585 | return status; | |
1586 | ||
1587 | status = nfs4_reclaim_locks(state, ops); | |
1588 | if (status < 0) | |
1589 | return status; | |
1590 | ||
1591 | if (!test_bit(NFS_DELEGATED_STATE, &state->flags)) { | |
1592 | spin_lock(&state->state_lock); | |
1593 | list_for_each_entry(lock, &state->lock_states, ls_locks) { | |
1594 | if (!test_bit(NFS_LOCK_INITIALIZED, &lock->ls_flags)) | |
1595 | pr_warn_ratelimited("NFS: %s: Lock reclaim failed!\n", __func__); | |
1596 | } | |
1597 | spin_unlock(&state->state_lock); | |
1598 | } | |
1599 | ||
80f42368 | 1600 | nfs42_complete_copies(sp, state); |
cb7a8384 AS |
1601 | clear_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags); |
1602 | return status; | |
1603 | } | |
1604 | ||
02860014 | 1605 | static int nfs4_reclaim_open_state(struct nfs4_state_owner *sp, const struct nfs4_state_recovery_ops *ops) |
1da177e4 LT |
1606 | { |
1607 | struct nfs4_state *state; | |
1da177e4 LT |
1608 | int status = 0; |
1609 | ||
1610 | /* Note: we rely on the sp->so_states list being ordered | |
1611 | * so that we always reclaim open(O_RDWR) and/or open(O_WRITE) | |
1612 | * states first. | |
1613 | * This is needed to ensure that the server won't give us any | |
1614 | * read delegations that we have to return if, say, we are | |
1615 | * recovering after a network partition or a reboot from a | |
1616 | * server that doesn't support a grace period. | |
1617 | */ | |
fe1d8195 | 1618 | spin_lock(&sp->so_lock); |
abbec2da | 1619 | raw_write_seqcount_begin(&sp->so_reclaim_seqcount); |
c137afab | 1620 | restart: |
1da177e4 | 1621 | list_for_each_entry(state, &sp->so_states, open_states) { |
b79a4a1b TM |
1622 | if (!test_and_clear_bit(ops->state_flag_bit, &state->flags)) |
1623 | continue; | |
5d422301 TM |
1624 | if (!nfs4_valid_open_stateid(state)) |
1625 | continue; | |
1da177e4 LT |
1626 | if (state->state == 0) |
1627 | continue; | |
ace9fad4 | 1628 | refcount_inc(&state->count); |
fe1d8195 | 1629 | spin_unlock(&sp->so_lock); |
cb7a8384 | 1630 | status = __nfs4_reclaim_open_state(sp, state, ops); |
cb7a8384 | 1631 | |
1da177e4 | 1632 | switch (status) { |
35a61606 AS |
1633 | default: |
1634 | if (status >= 0) | |
b79a4a1b | 1635 | break; |
35a61606 AS |
1636 | printk(KERN_ERR "NFS: %s: unhandled error %d\n", __func__, status); |
1637 | /* Fall through */ | |
1638 | case -ENOENT: | |
1639 | case -ENOMEM: | |
1640 | case -EACCES: | |
1641 | case -EROFS: | |
1642 | case -EIO: | |
1643 | case -ESTALE: | |
1644 | /* Open state on this file cannot be recovered */ | |
1645 | nfs4_state_mark_recovery_failed(state, status); | |
1646 | break; | |
1647 | case -EAGAIN: | |
1648 | ssleep(1); | |
1649 | /* Fall through */ | |
1650 | case -NFS4ERR_ADMIN_REVOKED: | |
1651 | case -NFS4ERR_STALE_STATEID: | |
1652 | case -NFS4ERR_OLD_STATEID: | |
1653 | case -NFS4ERR_BAD_STATEID: | |
1654 | case -NFS4ERR_RECLAIM_BAD: | |
1655 | case -NFS4ERR_RECLAIM_CONFLICT: | |
1656 | nfs4_state_mark_reclaim_nograce(sp->so_server->nfs_client, state); | |
1657 | break; | |
1658 | case -NFS4ERR_EXPIRED: | |
1659 | case -NFS4ERR_NO_GRACE: | |
1660 | nfs4_state_mark_reclaim_nograce(sp->so_server->nfs_client, state); | |
1661 | case -NFS4ERR_STALE_CLIENTID: | |
1662 | case -NFS4ERR_BADSESSION: | |
1663 | case -NFS4ERR_BADSLOT: | |
1664 | case -NFS4ERR_BAD_HIGH_SLOT: | |
1665 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
1666 | goto out_err; | |
1da177e4 | 1667 | } |
fe1d8195 | 1668 | nfs4_put_open_state(state); |
c137afab | 1669 | spin_lock(&sp->so_lock); |
fe1d8195 | 1670 | goto restart; |
1da177e4 | 1671 | } |
abbec2da | 1672 | raw_write_seqcount_end(&sp->so_reclaim_seqcount); |
fe1d8195 | 1673 | spin_unlock(&sp->so_lock); |
1da177e4 LT |
1674 | return 0; |
1675 | out_err: | |
fe1d8195 | 1676 | nfs4_put_open_state(state); |
c137afab | 1677 | spin_lock(&sp->so_lock); |
abbec2da | 1678 | raw_write_seqcount_end(&sp->so_reclaim_seqcount); |
c137afab | 1679 | spin_unlock(&sp->so_lock); |
1da177e4 LT |
1680 | return status; |
1681 | } | |
1682 | ||
b79a4a1b TM |
1683 | static void nfs4_clear_open_state(struct nfs4_state *state) |
1684 | { | |
1685 | struct nfs4_lock_state *lock; | |
1686 | ||
1687 | clear_bit(NFS_DELEGATED_STATE, &state->flags); | |
1688 | clear_bit(NFS_O_RDONLY_STATE, &state->flags); | |
1689 | clear_bit(NFS_O_WRONLY_STATE, &state->flags); | |
1690 | clear_bit(NFS_O_RDWR_STATE, &state->flags); | |
4b44b40e | 1691 | spin_lock(&state->state_lock); |
b79a4a1b | 1692 | list_for_each_entry(lock, &state->lock_states, ls_locks) { |
b79a4a1b | 1693 | lock->ls_seqid.flags = 0; |
795a88c9 | 1694 | clear_bit(NFS_LOCK_INITIALIZED, &lock->ls_flags); |
b79a4a1b | 1695 | } |
4b44b40e | 1696 | spin_unlock(&state->state_lock); |
b79a4a1b TM |
1697 | } |
1698 | ||
24d292b8 CL |
1699 | static void nfs4_reset_seqids(struct nfs_server *server, |
1700 | int (*mark_reclaim)(struct nfs_client *clp, struct nfs4_state *state)) | |
cee54fc9 | 1701 | { |
24d292b8 | 1702 | struct nfs_client *clp = server->nfs_client; |
cee54fc9 | 1703 | struct nfs4_state_owner *sp; |
9f958ab8 | 1704 | struct rb_node *pos; |
cee54fc9 | 1705 | struct nfs4_state *state; |
cee54fc9 | 1706 | |
24d292b8 CL |
1707 | spin_lock(&clp->cl_lock); |
1708 | for (pos = rb_first(&server->state_owners); | |
1709 | pos != NULL; | |
1710 | pos = rb_next(pos)) { | |
1711 | sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); | |
cee54fc9 | 1712 | sp->so_seqid.flags = 0; |
ec073428 | 1713 | spin_lock(&sp->so_lock); |
cee54fc9 | 1714 | list_for_each_entry(state, &sp->so_states, open_states) { |
b79a4a1b TM |
1715 | if (mark_reclaim(clp, state)) |
1716 | nfs4_clear_open_state(state); | |
cee54fc9 | 1717 | } |
ec073428 | 1718 | spin_unlock(&sp->so_lock); |
cee54fc9 | 1719 | } |
24d292b8 CL |
1720 | spin_unlock(&clp->cl_lock); |
1721 | } | |
1722 | ||
1723 | static void nfs4_state_mark_reclaim_helper(struct nfs_client *clp, | |
1724 | int (*mark_reclaim)(struct nfs_client *clp, struct nfs4_state *state)) | |
1725 | { | |
1726 | struct nfs_server *server; | |
1727 | ||
1728 | rcu_read_lock(); | |
1729 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) | |
1730 | nfs4_reset_seqids(server, mark_reclaim); | |
1731 | rcu_read_unlock(); | |
cee54fc9 TM |
1732 | } |
1733 | ||
b79a4a1b TM |
1734 | static void nfs4_state_start_reclaim_reboot(struct nfs_client *clp) |
1735 | { | |
1736 | /* Mark all delegations for reclaim */ | |
1737 | nfs_delegation_mark_reclaim(clp); | |
1738 | nfs4_state_mark_reclaim_helper(clp, nfs4_state_mark_reclaim_reboot); | |
1739 | } | |
1740 | ||
0048fdd0 | 1741 | static int nfs4_reclaim_complete(struct nfs_client *clp, |
965e9c23 TM |
1742 | const struct nfs4_state_recovery_ops *ops, |
1743 | struct rpc_cred *cred) | |
fce5c838 RL |
1744 | { |
1745 | /* Notify the server we're done reclaiming our state */ | |
1746 | if (ops->reclaim_complete) | |
0048fdd0 TM |
1747 | return ops->reclaim_complete(clp, cred); |
1748 | return 0; | |
fce5c838 RL |
1749 | } |
1750 | ||
24d292b8 | 1751 | static void nfs4_clear_reclaim_server(struct nfs_server *server) |
b79a4a1b | 1752 | { |
24d292b8 | 1753 | struct nfs_client *clp = server->nfs_client; |
b79a4a1b TM |
1754 | struct nfs4_state_owner *sp; |
1755 | struct rb_node *pos; | |
1756 | struct nfs4_state *state; | |
1757 | ||
24d292b8 CL |
1758 | spin_lock(&clp->cl_lock); |
1759 | for (pos = rb_first(&server->state_owners); | |
1760 | pos != NULL; | |
1761 | pos = rb_next(pos)) { | |
1762 | sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); | |
b79a4a1b TM |
1763 | spin_lock(&sp->so_lock); |
1764 | list_for_each_entry(state, &sp->so_states, open_states) { | |
24d292b8 CL |
1765 | if (!test_and_clear_bit(NFS_STATE_RECLAIM_REBOOT, |
1766 | &state->flags)) | |
b79a4a1b TM |
1767 | continue; |
1768 | nfs4_state_mark_reclaim_nograce(clp, state); | |
1769 | } | |
1770 | spin_unlock(&sp->so_lock); | |
1771 | } | |
24d292b8 CL |
1772 | spin_unlock(&clp->cl_lock); |
1773 | } | |
1774 | ||
1775 | static int nfs4_state_clear_reclaim_reboot(struct nfs_client *clp) | |
1776 | { | |
1777 | struct nfs_server *server; | |
1778 | ||
1779 | if (!test_and_clear_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) | |
1780 | return 0; | |
1781 | ||
1782 | rcu_read_lock(); | |
1783 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) | |
1784 | nfs4_clear_reclaim_server(server); | |
1785 | rcu_read_unlock(); | |
b79a4a1b TM |
1786 | |
1787 | nfs_delegation_reap_unclaimed(clp); | |
6eaa6149 TM |
1788 | return 1; |
1789 | } | |
1790 | ||
1791 | static void nfs4_state_end_reclaim_reboot(struct nfs_client *clp) | |
1792 | { | |
965e9c23 TM |
1793 | const struct nfs4_state_recovery_ops *ops; |
1794 | struct rpc_cred *cred; | |
0048fdd0 | 1795 | int err; |
965e9c23 | 1796 | |
6eaa6149 TM |
1797 | if (!nfs4_state_clear_reclaim_reboot(clp)) |
1798 | return; | |
965e9c23 | 1799 | ops = clp->cl_mvops->reboot_recovery_ops; |
73d8bde5 | 1800 | cred = nfs4_get_clid_cred(clp); |
0048fdd0 | 1801 | err = nfs4_reclaim_complete(clp, ops, cred); |
965e9c23 | 1802 | put_rpccred(cred); |
0048fdd0 TM |
1803 | if (err == -NFS4ERR_CONN_NOT_BOUND_TO_SESSION) |
1804 | set_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state); | |
b79a4a1b TM |
1805 | } |
1806 | ||
b79a4a1b TM |
1807 | static void nfs4_state_start_reclaim_nograce(struct nfs_client *clp) |
1808 | { | |
45870d69 | 1809 | nfs_mark_test_expired_all_delegations(clp); |
b79a4a1b TM |
1810 | nfs4_state_mark_reclaim_helper(clp, nfs4_state_mark_reclaim_nograce); |
1811 | } | |
1812 | ||
4f7cdf18 | 1813 | static int nfs4_recovery_handle_error(struct nfs_client *clp, int error) |
e598d843 TM |
1814 | { |
1815 | switch (error) { | |
000d3f95 AS |
1816 | case 0: |
1817 | break; | |
1818 | case -NFS4ERR_CB_PATH_DOWN: | |
1819 | nfs40_handle_cb_pathdown(clp); | |
1820 | break; | |
1821 | case -NFS4ERR_NO_GRACE: | |
1822 | nfs4_state_end_reclaim_reboot(clp); | |
1823 | break; | |
1824 | case -NFS4ERR_STALE_CLIENTID: | |
1825 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1826 | nfs4_state_start_reclaim_reboot(clp); | |
1827 | break; | |
1828 | case -NFS4ERR_EXPIRED: | |
1829 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1830 | nfs4_state_start_reclaim_nograce(clp); | |
1831 | break; | |
1832 | case -NFS4ERR_BADSESSION: | |
1833 | case -NFS4ERR_BADSLOT: | |
1834 | case -NFS4ERR_BAD_HIGH_SLOT: | |
1835 | case -NFS4ERR_DEADSESSION: | |
1836 | case -NFS4ERR_SEQ_FALSE_RETRY: | |
1837 | case -NFS4ERR_SEQ_MISORDERED: | |
1838 | set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); | |
1839 | /* Zero session reset errors */ | |
1840 | break; | |
1841 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
1842 | set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); | |
1843 | break; | |
1844 | default: | |
1845 | dprintk("%s: failed to handle error %d for server %s\n", | |
1846 | __func__, error, clp->cl_hostname); | |
1847 | return error; | |
e598d843 | 1848 | } |
cc0a9843 TM |
1849 | dprintk("%s: handled error %d for server %s\n", __func__, error, |
1850 | clp->cl_hostname); | |
4f38e4aa | 1851 | return 0; |
e598d843 TM |
1852 | } |
1853 | ||
02860014 | 1854 | static int nfs4_do_reclaim(struct nfs_client *clp, const struct nfs4_state_recovery_ops *ops) |
1da177e4 | 1855 | { |
24d292b8 CL |
1856 | struct nfs4_state_owner *sp; |
1857 | struct nfs_server *server; | |
9f958ab8 | 1858 | struct rb_node *pos; |
1da177e4 LT |
1859 | int status = 0; |
1860 | ||
7eff03ae | 1861 | restart: |
24d292b8 CL |
1862 | rcu_read_lock(); |
1863 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { | |
0aaaf5c4 | 1864 | nfs4_purge_state_owners(server); |
24d292b8 CL |
1865 | spin_lock(&clp->cl_lock); |
1866 | for (pos = rb_first(&server->state_owners); | |
1867 | pos != NULL; | |
1868 | pos = rb_next(pos)) { | |
1869 | sp = rb_entry(pos, | |
1870 | struct nfs4_state_owner, so_server_node); | |
1871 | if (!test_and_clear_bit(ops->owner_flag_bit, | |
1872 | &sp->so_flags)) | |
1873 | continue; | |
4a0954ef TM |
1874 | if (!atomic_inc_not_zero(&sp->so_count)) |
1875 | continue; | |
24d292b8 CL |
1876 | spin_unlock(&clp->cl_lock); |
1877 | rcu_read_unlock(); | |
1878 | ||
1879 | status = nfs4_reclaim_open_state(sp, ops); | |
1880 | if (status < 0) { | |
1881 | set_bit(ops->owner_flag_bit, &sp->so_flags); | |
1882 | nfs4_put_state_owner(sp); | |
df817ba3 TM |
1883 | status = nfs4_recovery_handle_error(clp, status); |
1884 | return (status != 0) ? status : -EAGAIN; | |
24d292b8 CL |
1885 | } |
1886 | ||
7eff03ae | 1887 | nfs4_put_state_owner(sp); |
24d292b8 | 1888 | goto restart; |
7eff03ae | 1889 | } |
24d292b8 | 1890 | spin_unlock(&clp->cl_lock); |
02860014 | 1891 | } |
24d292b8 | 1892 | rcu_read_unlock(); |
df817ba3 | 1893 | return 0; |
02860014 TM |
1894 | } |
1895 | ||
1896 | static int nfs4_check_lease(struct nfs_client *clp) | |
1897 | { | |
1898 | struct rpc_cred *cred; | |
c48f4f35 TM |
1899 | const struct nfs4_state_maintenance_ops *ops = |
1900 | clp->cl_mvops->state_renewal_ops; | |
4f38e4aa | 1901 | int status; |
1da177e4 | 1902 | |
0f605b56 TM |
1903 | /* Is the client already known to have an expired lease? */ |
1904 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) | |
1905 | return 0; | |
a7b72103 AA |
1906 | spin_lock(&clp->cl_lock); |
1907 | cred = ops->get_state_renewal_cred_locked(clp); | |
1908 | spin_unlock(&clp->cl_lock); | |
0f605b56 | 1909 | if (cred == NULL) { |
73d8bde5 | 1910 | cred = nfs4_get_clid_cred(clp); |
4f38e4aa | 1911 | status = -ENOKEY; |
0f605b56 TM |
1912 | if (cred == NULL) |
1913 | goto out; | |
286d7d6a | 1914 | } |
8e69514f | 1915 | status = ops->renew_lease(clp, cred); |
0f605b56 | 1916 | put_rpccred(cred); |
bc7a05ca TM |
1917 | if (status == -ETIMEDOUT) { |
1918 | set_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); | |
1919 | return 0; | |
1920 | } | |
0f605b56 | 1921 | out: |
4f7cdf18 | 1922 | return nfs4_recovery_handle_error(clp, status); |
02860014 TM |
1923 | } |
1924 | ||
47b803c8 AA |
1925 | /* Set NFS4CLNT_LEASE_EXPIRED and reclaim reboot state for all v4.0 errors |
1926 | * and for recoverable errors on EXCHANGE_ID for v4.1 | |
2a6ee6aa TM |
1927 | */ |
1928 | static int nfs4_handle_reclaim_lease_error(struct nfs_client *clp, int status) | |
1929 | { | |
1930 | switch (status) { | |
89a21736 TM |
1931 | case -NFS4ERR_SEQ_MISORDERED: |
1932 | if (test_and_set_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) | |
1933 | return -ESERVERFAULT; | |
1934 | /* Lease confirmation error: retry after purging the lease */ | |
1935 | ssleep(1); | |
47b803c8 AA |
1936 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
1937 | break; | |
2a6ee6aa TM |
1938 | case -NFS4ERR_STALE_CLIENTID: |
1939 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); | |
47b803c8 | 1940 | nfs4_state_start_reclaim_reboot(clp); |
2a6ee6aa | 1941 | break; |
de734831 CL |
1942 | case -NFS4ERR_CLID_INUSE: |
1943 | pr_err("NFS: Server %s reports our clientid is in use\n", | |
1944 | clp->cl_hostname); | |
1945 | nfs_mark_client_ready(clp, -EPERM); | |
1946 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); | |
1947 | return -EPERM; | |
2a6ee6aa | 1948 | case -EACCES: |
2a6ee6aa TM |
1949 | case -NFS4ERR_DELAY: |
1950 | case -ETIMEDOUT: | |
1951 | case -EAGAIN: | |
1952 | ssleep(1); | |
1953 | break; | |
1954 | ||
1955 | case -NFS4ERR_MINOR_VERS_MISMATCH: | |
1956 | if (clp->cl_cons_state == NFS_CS_SESSION_INITING) | |
1957 | nfs_mark_client_ready(clp, -EPROTONOSUPPORT); | |
cc0a9843 TM |
1958 | dprintk("%s: exit with error %d for server %s\n", |
1959 | __func__, -EPROTONOSUPPORT, clp->cl_hostname); | |
2a6ee6aa | 1960 | return -EPROTONOSUPPORT; |
2a6ee6aa TM |
1961 | case -NFS4ERR_NOT_SAME: /* FixMe: implement recovery |
1962 | * in nfs4_exchange_id */ | |
1963 | default: | |
cc0a9843 TM |
1964 | dprintk("%s: exit with error %d for server %s\n", __func__, |
1965 | status, clp->cl_hostname); | |
2a6ee6aa TM |
1966 | return status; |
1967 | } | |
1968 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
cc0a9843 TM |
1969 | dprintk("%s: handled error %d for server %s\n", __func__, status, |
1970 | clp->cl_hostname); | |
2a6ee6aa TM |
1971 | return 0; |
1972 | } | |
1973 | ||
b42353ff | 1974 | static int nfs4_establish_lease(struct nfs_client *clp) |
02860014 TM |
1975 | { |
1976 | struct rpc_cred *cred; | |
c48f4f35 TM |
1977 | const struct nfs4_state_recovery_ops *ops = |
1978 | clp->cl_mvops->reboot_recovery_ops; | |
2a6ee6aa | 1979 | int status; |
02860014 | 1980 | |
8aafd2fd TM |
1981 | status = nfs4_begin_drain_session(clp); |
1982 | if (status != 0) | |
1983 | return status; | |
73d8bde5 | 1984 | cred = nfs4_get_clid_cred(clp); |
2a6ee6aa TM |
1985 | if (cred == NULL) |
1986 | return -ENOENT; | |
1987 | status = ops->establish_clid(clp, cred); | |
1988 | put_rpccred(cred); | |
1989 | if (status != 0) | |
b42353ff TM |
1990 | return status; |
1991 | pnfs_destroy_all_layouts(clp); | |
1992 | return 0; | |
1993 | } | |
1994 | ||
6bbb4ae8 CL |
1995 | /* |
1996 | * Returns zero or a negative errno. NFS4ERR values are converted | |
1997 | * to local errno values. | |
1998 | */ | |
b42353ff TM |
1999 | static int nfs4_reclaim_lease(struct nfs_client *clp) |
2000 | { | |
2001 | int status; | |
2002 | ||
2003 | status = nfs4_establish_lease(clp); | |
2004 | if (status < 0) | |
2005 | return nfs4_handle_reclaim_lease_error(clp, status); | |
2006 | if (test_and_clear_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state)) | |
2007 | nfs4_state_start_reclaim_nograce(clp); | |
2008 | if (!test_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) | |
2009 | set_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state); | |
2010 | clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); | |
2011 | clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
2012 | return 0; | |
2013 | } | |
2014 | ||
2015 | static int nfs4_purge_lease(struct nfs_client *clp) | |
2016 | { | |
2017 | int status; | |
2018 | ||
2019 | status = nfs4_establish_lease(clp); | |
2020 | if (status < 0) | |
2a6ee6aa | 2021 | return nfs4_handle_reclaim_lease_error(clp, status); |
b42353ff TM |
2022 | clear_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state); |
2023 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
2024 | nfs4_state_start_reclaim_nograce(clp); | |
2a6ee6aa | 2025 | return 0; |
02860014 TM |
2026 | } |
2027 | ||
c9fdeb28 CL |
2028 | /* |
2029 | * Try remote migration of one FSID from a source server to a | |
2030 | * destination server. The source server provides a list of | |
2031 | * potential destinations. | |
2032 | * | |
2033 | * Returns zero or a negative NFS4ERR status code. | |
2034 | */ | |
2035 | static int nfs4_try_migration(struct nfs_server *server, struct rpc_cred *cred) | |
2036 | { | |
2037 | struct nfs_client *clp = server->nfs_client; | |
2038 | struct nfs4_fs_locations *locations = NULL; | |
2039 | struct inode *inode; | |
2040 | struct page *page; | |
2041 | int status, result; | |
2042 | ||
2043 | dprintk("--> %s: FSID %llx:%llx on \"%s\"\n", __func__, | |
2044 | (unsigned long long)server->fsid.major, | |
2045 | (unsigned long long)server->fsid.minor, | |
2046 | clp->cl_hostname); | |
2047 | ||
2048 | result = 0; | |
2049 | page = alloc_page(GFP_KERNEL); | |
2050 | locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL); | |
2051 | if (page == NULL || locations == NULL) { | |
2052 | dprintk("<-- %s: no memory\n", __func__); | |
2053 | goto out; | |
2054 | } | |
2055 | ||
2b0143b5 | 2056 | inode = d_inode(server->super->s_root); |
c9fdeb28 CL |
2057 | result = nfs4_proc_get_locations(inode, locations, page, cred); |
2058 | if (result) { | |
2059 | dprintk("<-- %s: failed to retrieve fs_locations: %d\n", | |
2060 | __func__, result); | |
2061 | goto out; | |
2062 | } | |
2063 | ||
2064 | result = -NFS4ERR_NXIO; | |
2065 | if (!(locations->fattr.valid & NFS_ATTR_FATTR_V4_LOCATIONS)) { | |
2066 | dprintk("<-- %s: No fs_locations data, migration skipped\n", | |
2067 | __func__); | |
2068 | goto out; | |
2069 | } | |
2070 | ||
8aafd2fd TM |
2071 | status = nfs4_begin_drain_session(clp); |
2072 | if (status != 0) | |
2073 | return status; | |
c9fdeb28 CL |
2074 | |
2075 | status = nfs4_replace_transport(server, locations); | |
2076 | if (status != 0) { | |
2077 | dprintk("<-- %s: failed to replace transport: %d\n", | |
2078 | __func__, status); | |
2079 | goto out; | |
2080 | } | |
2081 | ||
2082 | result = 0; | |
2083 | dprintk("<-- %s: migration succeeded\n", __func__); | |
2084 | ||
2085 | out: | |
2086 | if (page != NULL) | |
2087 | __free_page(page); | |
2088 | kfree(locations); | |
2089 | if (result) { | |
2090 | pr_err("NFS: migration recovery failed (server %s)\n", | |
2091 | clp->cl_hostname); | |
2092 | set_bit(NFS_MIG_FAILED, &server->mig_status); | |
2093 | } | |
2094 | return result; | |
2095 | } | |
2096 | ||
2097 | /* | |
2098 | * Returns zero or a negative NFS4ERR status code. | |
2099 | */ | |
2100 | static int nfs4_handle_migration(struct nfs_client *clp) | |
2101 | { | |
2102 | const struct nfs4_state_maintenance_ops *ops = | |
2103 | clp->cl_mvops->state_renewal_ops; | |
2104 | struct nfs_server *server; | |
2105 | struct rpc_cred *cred; | |
2106 | ||
2107 | dprintk("%s: migration reported on \"%s\"\n", __func__, | |
2108 | clp->cl_hostname); | |
2109 | ||
2110 | spin_lock(&clp->cl_lock); | |
2111 | cred = ops->get_state_renewal_cred_locked(clp); | |
2112 | spin_unlock(&clp->cl_lock); | |
2113 | if (cred == NULL) | |
2114 | return -NFS4ERR_NOENT; | |
2115 | ||
2116 | clp->cl_mig_gen++; | |
2117 | restart: | |
2118 | rcu_read_lock(); | |
2119 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { | |
2120 | int status; | |
2121 | ||
2122 | if (server->mig_gen == clp->cl_mig_gen) | |
2123 | continue; | |
2124 | server->mig_gen = clp->cl_mig_gen; | |
2125 | ||
2126 | if (!test_and_clear_bit(NFS_MIG_IN_TRANSITION, | |
2127 | &server->mig_status)) | |
2128 | continue; | |
2129 | ||
2130 | rcu_read_unlock(); | |
2131 | status = nfs4_try_migration(server, cred); | |
2132 | if (status < 0) { | |
2133 | put_rpccred(cred); | |
2134 | return status; | |
2135 | } | |
2136 | goto restart; | |
2137 | } | |
2138 | rcu_read_unlock(); | |
2139 | put_rpccred(cred); | |
2140 | return 0; | |
2141 | } | |
2142 | ||
b7f7a66e CL |
2143 | /* |
2144 | * Test each nfs_server on the clp's cl_superblocks list to see | |
2145 | * if it's moved to another server. Stop when the server no longer | |
2146 | * returns NFS4ERR_LEASE_MOVED. | |
2147 | */ | |
2148 | static int nfs4_handle_lease_moved(struct nfs_client *clp) | |
2149 | { | |
2150 | const struct nfs4_state_maintenance_ops *ops = | |
2151 | clp->cl_mvops->state_renewal_ops; | |
2152 | struct nfs_server *server; | |
2153 | struct rpc_cred *cred; | |
2154 | ||
2155 | dprintk("%s: lease moved reported on \"%s\"\n", __func__, | |
2156 | clp->cl_hostname); | |
2157 | ||
2158 | spin_lock(&clp->cl_lock); | |
2159 | cred = ops->get_state_renewal_cred_locked(clp); | |
2160 | spin_unlock(&clp->cl_lock); | |
2161 | if (cred == NULL) | |
2162 | return -NFS4ERR_NOENT; | |
2163 | ||
2164 | clp->cl_mig_gen++; | |
2165 | restart: | |
2166 | rcu_read_lock(); | |
2167 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { | |
2168 | struct inode *inode; | |
2169 | int status; | |
2170 | ||
2171 | if (server->mig_gen == clp->cl_mig_gen) | |
2172 | continue; | |
2173 | server->mig_gen = clp->cl_mig_gen; | |
2174 | ||
2175 | rcu_read_unlock(); | |
2176 | ||
2b0143b5 | 2177 | inode = d_inode(server->super->s_root); |
b7f7a66e CL |
2178 | status = nfs4_proc_fsid_present(inode, cred); |
2179 | if (status != -NFS4ERR_MOVED) | |
2180 | goto restart; /* wasn't this one */ | |
2181 | if (nfs4_try_migration(server, cred) == -NFS4ERR_LEASE_MOVED) | |
2182 | goto restart; /* there are more */ | |
2183 | goto out; | |
2184 | } | |
2185 | rcu_read_unlock(); | |
2186 | ||
2187 | out: | |
2188 | put_rpccred(cred); | |
2189 | return 0; | |
2190 | } | |
2191 | ||
05f4c350 CL |
2192 | /** |
2193 | * nfs4_discover_server_trunking - Detect server IP address trunking | |
2194 | * | |
2195 | * @clp: nfs_client under test | |
2196 | * @result: OUT: found nfs_client, or clp | |
2197 | * | |
2198 | * Returns zero or a negative errno. If zero is returned, | |
2199 | * an nfs_client pointer is planted in "result". | |
2200 | * | |
2201 | * Note: since we are invoked in process context, and | |
2202 | * not from inside the state manager, we cannot use | |
2203 | * nfs4_handle_reclaim_lease_error(). | |
2204 | */ | |
2205 | int nfs4_discover_server_trunking(struct nfs_client *clp, | |
2206 | struct nfs_client **result) | |
2207 | { | |
2208 | const struct nfs4_state_recovery_ops *ops = | |
2209 | clp->cl_mvops->reboot_recovery_ops; | |
05f4c350 CL |
2210 | struct rpc_clnt *clnt; |
2211 | struct rpc_cred *cred; | |
4edaa308 | 2212 | int i, status; |
05f4c350 CL |
2213 | |
2214 | dprintk("NFS: %s: testing '%s'\n", __func__, clp->cl_hostname); | |
2215 | ||
05f4c350 | 2216 | clnt = clp->cl_rpcclient; |
05f4c350 CL |
2217 | i = 0; |
2218 | ||
2219 | mutex_lock(&nfs_clid_init_mutex); | |
05f4c350 | 2220 | again: |
ea33e6c3 | 2221 | status = -ENOENT; |
73d8bde5 | 2222 | cred = nfs4_get_clid_cred(clp); |
05f4c350 CL |
2223 | if (cred == NULL) |
2224 | goto out_unlock; | |
2225 | ||
2226 | status = ops->detect_trunking(clp, result, cred); | |
2227 | put_rpccred(cred); | |
2228 | switch (status) { | |
2229 | case 0: | |
898fc11b TM |
2230 | case -EINTR: |
2231 | case -ERESTARTSYS: | |
05f4c350 | 2232 | break; |
05f4c350 | 2233 | case -ETIMEDOUT: |
150e7260 TM |
2234 | if (clnt->cl_softrtry) |
2235 | break; | |
01e03bdc | 2236 | /* Fall through */ |
150e7260 | 2237 | case -NFS4ERR_DELAY: |
05f4c350 CL |
2238 | case -EAGAIN: |
2239 | ssleep(1); | |
01e03bdc | 2240 | /* Fall through */ |
202c312d | 2241 | case -NFS4ERR_STALE_CLIENTID: |
05f4c350 CL |
2242 | dprintk("NFS: %s after status %d, retrying\n", |
2243 | __func__, status); | |
2244 | goto again; | |
4edaa308 | 2245 | case -EACCES: |
d688f7b8 CL |
2246 | if (i++ == 0) { |
2247 | nfs4_root_machine_cred(clp); | |
2248 | goto again; | |
2249 | } | |
6d769f1e | 2250 | if (clnt->cl_auth->au_flavor == RPC_AUTH_UNIX) |
4edaa308 | 2251 | break; |
01e03bdc | 2252 | /* Fall through */ |
05f4c350 CL |
2253 | case -NFS4ERR_CLID_INUSE: |
2254 | case -NFS4ERR_WRONGSEC: | |
6d769f1e JL |
2255 | /* No point in retrying if we already used RPC_AUTH_UNIX */ |
2256 | if (clnt->cl_auth->au_flavor == RPC_AUTH_UNIX) { | |
2257 | status = -EPERM; | |
2258 | break; | |
2259 | } | |
79d852bf | 2260 | clnt = rpc_clone_client_set_auth(clnt, RPC_AUTH_UNIX); |
05f4c350 CL |
2261 | if (IS_ERR(clnt)) { |
2262 | status = PTR_ERR(clnt); | |
2263 | break; | |
2264 | } | |
b193d59a TM |
2265 | /* Note: this is safe because we haven't yet marked the |
2266 | * client as ready, so we are the only user of | |
2267 | * clp->cl_rpcclient | |
2268 | */ | |
2269 | clnt = xchg(&clp->cl_rpcclient, clnt); | |
2270 | rpc_shutdown_client(clnt); | |
2271 | clnt = clp->cl_rpcclient; | |
05f4c350 CL |
2272 | goto again; |
2273 | ||
2274 | case -NFS4ERR_MINOR_VERS_MISMATCH: | |
2275 | status = -EPROTONOSUPPORT; | |
2276 | break; | |
2277 | ||
2278 | case -EKEYEXPIRED: | |
05f4c350 CL |
2279 | case -NFS4ERR_NOT_SAME: /* FixMe: implement recovery |
2280 | * in nfs4_exchange_id */ | |
2281 | status = -EKEYEXPIRED; | |
ea33e6c3 TM |
2282 | break; |
2283 | default: | |
2284 | pr_warn("NFS: %s unhandled error %d. Exiting with error EIO\n", | |
2285 | __func__, status); | |
2286 | status = -EIO; | |
05f4c350 CL |
2287 | } |
2288 | ||
2289 | out_unlock: | |
2290 | mutex_unlock(&nfs_clid_init_mutex); | |
05f4c350 CL |
2291 | dprintk("NFS: %s: status = %d\n", __func__, status); |
2292 | return status; | |
2293 | } | |
2294 | ||
76db6d95 | 2295 | #ifdef CONFIG_NFS_V4_1 |
9f594791 | 2296 | void nfs4_schedule_session_recovery(struct nfs4_session *session, int err) |
0400a6b0 | 2297 | { |
444f72fe TM |
2298 | struct nfs_client *clp = session->clp; |
2299 | ||
9f594791 TM |
2300 | switch (err) { |
2301 | default: | |
2302 | set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); | |
2303 | break; | |
2304 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
2305 | set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); | |
2306 | } | |
d94cbf6c | 2307 | nfs4_schedule_state_manager(clp); |
0400a6b0 | 2308 | } |
cbdabc7f | 2309 | EXPORT_SYMBOL_GPL(nfs4_schedule_session_recovery); |
0400a6b0 | 2310 | |
3f10a6af | 2311 | void nfs41_notify_server(struct nfs_client *clp) |
ac074835 TM |
2312 | { |
2313 | /* Use CHECK_LEASE to ping the server with a SEQUENCE */ | |
2314 | set_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); | |
2315 | nfs4_schedule_state_manager(clp); | |
2316 | } | |
2317 | ||
0f79fd6f TM |
2318 | static void nfs4_reset_all_state(struct nfs_client *clp) |
2319 | { | |
2320 | if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) == 0) { | |
2c820d9a | 2321 | set_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state); |
be0bfed0 | 2322 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
0f79fd6f | 2323 | nfs4_state_start_reclaim_nograce(clp); |
cc0a9843 TM |
2324 | dprintk("%s: scheduling reset of all state for server %s!\n", |
2325 | __func__, clp->cl_hostname); | |
0400a6b0 | 2326 | nfs4_schedule_state_manager(clp); |
0f79fd6f TM |
2327 | } |
2328 | } | |
2329 | ||
2330 | static void nfs41_handle_server_reboot(struct nfs_client *clp) | |
2331 | { | |
2332 | if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) == 0) { | |
2333 | nfs4_state_start_reclaim_reboot(clp); | |
cc0a9843 TM |
2334 | dprintk("%s: server %s rebooted!\n", __func__, |
2335 | clp->cl_hostname); | |
0400a6b0 | 2336 | nfs4_schedule_state_manager(clp); |
0f79fd6f TM |
2337 | } |
2338 | } | |
2339 | ||
8b895ce6 | 2340 | static void nfs41_handle_all_state_revoked(struct nfs_client *clp) |
0f79fd6f | 2341 | { |
0f79fd6f | 2342 | nfs4_reset_all_state(clp); |
cc0a9843 | 2343 | dprintk("%s: state revoked on server %s\n", __func__, clp->cl_hostname); |
0f79fd6f TM |
2344 | } |
2345 | ||
8b895ce6 TM |
2346 | static void nfs41_handle_some_state_revoked(struct nfs_client *clp) |
2347 | { | |
45870d69 | 2348 | nfs4_state_start_reclaim_nograce(clp); |
8b895ce6 TM |
2349 | nfs4_schedule_state_manager(clp); |
2350 | ||
2351 | dprintk("%s: state revoked on server %s\n", __func__, clp->cl_hostname); | |
2352 | } | |
2353 | ||
0f79fd6f TM |
2354 | static void nfs41_handle_recallable_state_revoked(struct nfs_client *clp) |
2355 | { | |
4099287f TM |
2356 | /* FIXME: For now, we destroy all layouts. */ |
2357 | pnfs_destroy_all_layouts(clp); | |
2358 | /* FIXME: For now, we test all delegations+open state+locks. */ | |
2359 | nfs41_handle_some_state_revoked(clp); | |
cc0a9843 TM |
2360 | dprintk("%s: Recallable state revoked on server %s!\n", __func__, |
2361 | clp->cl_hostname); | |
0f79fd6f TM |
2362 | } |
2363 | ||
a9e64442 | 2364 | static void nfs41_handle_backchannel_fault(struct nfs_client *clp) |
0f79fd6f | 2365 | { |
b1352905 TM |
2366 | set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); |
2367 | nfs4_schedule_state_manager(clp); | |
2368 | ||
cc0a9843 TM |
2369 | dprintk("%s: server %s declared a backchannel fault\n", __func__, |
2370 | clp->cl_hostname); | |
0f79fd6f TM |
2371 | } |
2372 | ||
a9e64442 WAA |
2373 | static void nfs41_handle_cb_path_down(struct nfs_client *clp) |
2374 | { | |
2375 | if (test_and_set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, | |
2376 | &clp->cl_state) == 0) | |
2377 | nfs4_schedule_state_manager(clp); | |
2378 | } | |
2379 | ||
0a014a44 TM |
2380 | void nfs41_handle_sequence_flag_errors(struct nfs_client *clp, u32 flags, |
2381 | bool recovery) | |
0629e370 AB |
2382 | { |
2383 | if (!flags) | |
2384 | return; | |
2c820d9a CL |
2385 | |
2386 | dprintk("%s: \"%s\" (client ID %llx) flags=0x%08x\n", | |
2387 | __func__, clp->cl_hostname, clp->cl_clientid, flags); | |
0a014a44 TM |
2388 | /* |
2389 | * If we're called from the state manager thread, then assume we're | |
2390 | * already handling the RECLAIM_NEEDED and/or STATE_REVOKED. | |
2391 | * Those flags are expected to remain set until we're done | |
2392 | * recovering (see RFC5661, section 18.46.3). | |
2393 | */ | |
2394 | if (recovery) | |
2395 | goto out_recovery; | |
2c820d9a | 2396 | |
111d489f | 2397 | if (flags & SEQ4_STATUS_RESTART_RECLAIM_NEEDED) |
0f79fd6f | 2398 | nfs41_handle_server_reboot(clp); |
8b895ce6 TM |
2399 | if (flags & (SEQ4_STATUS_EXPIRED_ALL_STATE_REVOKED)) |
2400 | nfs41_handle_all_state_revoked(clp); | |
2401 | if (flags & (SEQ4_STATUS_EXPIRED_SOME_STATE_REVOKED | | |
d1c2331e | 2402 | SEQ4_STATUS_ADMIN_STATE_REVOKED)) |
8b895ce6 | 2403 | nfs41_handle_some_state_revoked(clp); |
d1c2331e CL |
2404 | if (flags & SEQ4_STATUS_LEASE_MOVED) |
2405 | nfs4_schedule_lease_moved_recovery(clp); | |
111d489f | 2406 | if (flags & SEQ4_STATUS_RECALLABLE_STATE_REVOKED) |
0f79fd6f | 2407 | nfs41_handle_recallable_state_revoked(clp); |
0a014a44 | 2408 | out_recovery: |
a9e64442 WAA |
2409 | if (flags & SEQ4_STATUS_BACKCHANNEL_FAULT) |
2410 | nfs41_handle_backchannel_fault(clp); | |
2411 | else if (flags & (SEQ4_STATUS_CB_PATH_DOWN | | |
2412 | SEQ4_STATUS_CB_PATH_DOWN_SESSION)) | |
0f79fd6f | 2413 | nfs41_handle_cb_path_down(clp); |
0629e370 AB |
2414 | } |
2415 | ||
c3fad1b1 AA |
2416 | static int nfs4_reset_session(struct nfs_client *clp) |
2417 | { | |
848f5bda | 2418 | struct rpc_cred *cred; |
c3fad1b1 AA |
2419 | int status; |
2420 | ||
1a47e7a6 TM |
2421 | if (!nfs4_has_session(clp)) |
2422 | return 0; | |
8aafd2fd TM |
2423 | status = nfs4_begin_drain_session(clp); |
2424 | if (status != 0) | |
2425 | return status; | |
73d8bde5 | 2426 | cred = nfs4_get_clid_cred(clp); |
848f5bda | 2427 | status = nfs4_proc_destroy_session(clp->cl_session, cred); |
c489ee29 TM |
2428 | switch (status) { |
2429 | case 0: | |
2430 | case -NFS4ERR_BADSESSION: | |
2431 | case -NFS4ERR_DEADSESSION: | |
2432 | break; | |
2433 | case -NFS4ERR_BACK_CHAN_BUSY: | |
2434 | case -NFS4ERR_DELAY: | |
2435 | set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); | |
2436 | status = 0; | |
2437 | ssleep(1); | |
2438 | goto out; | |
2439 | default: | |
f455848a | 2440 | status = nfs4_recovery_handle_error(clp, status); |
c3fad1b1 AA |
2441 | goto out; |
2442 | } | |
2443 | ||
2444 | memset(clp->cl_session->sess_id.data, 0, NFS4_MAX_SESSIONID_LEN); | |
848f5bda | 2445 | status = nfs4_proc_create_session(clp, cred); |
41f54a55 | 2446 | if (status) { |
cc0a9843 TM |
2447 | dprintk("%s: session reset failed with status %d for server %s!\n", |
2448 | __func__, status, clp->cl_hostname); | |
f2c1b510 | 2449 | status = nfs4_handle_reclaim_lease_error(clp, status); |
41f54a55 AA |
2450 | goto out; |
2451 | } | |
bda197f5 | 2452 | nfs41_finish_session_reset(clp); |
cc0a9843 TM |
2453 | dprintk("%s: session reset was successful for server %s!\n", |
2454 | __func__, clp->cl_hostname); | |
41f54a55 | 2455 | out: |
848f5bda TM |
2456 | if (cred) |
2457 | put_rpccred(cred); | |
c3fad1b1 AA |
2458 | return status; |
2459 | } | |
76db6d95 | 2460 | |
a9e64442 WAA |
2461 | static int nfs4_bind_conn_to_session(struct nfs_client *clp) |
2462 | { | |
2cf047c9 TM |
2463 | struct rpc_cred *cred; |
2464 | int ret; | |
2465 | ||
1a47e7a6 TM |
2466 | if (!nfs4_has_session(clp)) |
2467 | return 0; | |
8aafd2fd TM |
2468 | ret = nfs4_begin_drain_session(clp); |
2469 | if (ret != 0) | |
2470 | return ret; | |
73d8bde5 | 2471 | cred = nfs4_get_clid_cred(clp); |
2cf047c9 TM |
2472 | ret = nfs4_proc_bind_conn_to_session(clp, cred); |
2473 | if (cred) | |
2474 | put_rpccred(cred); | |
43ac544c | 2475 | clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); |
bf674c82 TM |
2476 | switch (ret) { |
2477 | case 0: | |
cc0a9843 TM |
2478 | dprintk("%s: bind_conn_to_session was successful for server %s!\n", |
2479 | __func__, clp->cl_hostname); | |
bf674c82 TM |
2480 | break; |
2481 | case -NFS4ERR_DELAY: | |
2482 | ssleep(1); | |
2483 | set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); | |
2484 | break; | |
2485 | default: | |
2486 | return nfs4_recovery_handle_error(clp, ret); | |
2487 | } | |
2488 | return 0; | |
a9e64442 | 2489 | } |
76db6d95 | 2490 | #else /* CONFIG_NFS_V4_1 */ |
c3fad1b1 | 2491 | static int nfs4_reset_session(struct nfs_client *clp) { return 0; } |
a9e64442 WAA |
2492 | |
2493 | static int nfs4_bind_conn_to_session(struct nfs_client *clp) | |
2494 | { | |
2495 | return 0; | |
2496 | } | |
76db6d95 AA |
2497 | #endif /* CONFIG_NFS_V4_1 */ |
2498 | ||
e005e804 | 2499 | static void nfs4_state_manager(struct nfs_client *clp) |
02860014 | 2500 | { |
02860014 | 2501 | int status = 0; |
8ed27d4f | 2502 | const char *section = "", *section_sep = ""; |
02860014 | 2503 | |
02860014 | 2504 | /* Ensure exclusive access to NFSv4 state */ |
47c2199b | 2505 | do { |
2c820d9a | 2506 | if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) { |
8ed27d4f | 2507 | section = "purge state"; |
b42353ff | 2508 | status = nfs4_purge_lease(clp); |
2a6ee6aa TM |
2509 | if (status < 0) |
2510 | goto out_error; | |
b42353ff | 2511 | continue; |
2c820d9a CL |
2512 | } |
2513 | ||
b42353ff | 2514 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) { |
8ed27d4f | 2515 | section = "lease expired"; |
b79a4a1b TM |
2516 | /* We're going to have to re-establish a clientid */ |
2517 | status = nfs4_reclaim_lease(clp); | |
2a6ee6aa | 2518 | if (status < 0) |
b79a4a1b | 2519 | goto out_error; |
b42353ff | 2520 | continue; |
e598d843 TM |
2521 | } |
2522 | ||
c3fad1b1 | 2523 | /* Initialize or reset the session */ |
1a47e7a6 | 2524 | if (test_and_clear_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state)) { |
8ed27d4f | 2525 | section = "reset session"; |
4d643d1d | 2526 | status = nfs4_reset_session(clp); |
b6d408ba TM |
2527 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
2528 | continue; | |
2529 | if (status < 0) | |
76db6d95 | 2530 | goto out_error; |
76db6d95 | 2531 | } |
b6d408ba | 2532 | |
a9e64442 WAA |
2533 | /* Send BIND_CONN_TO_SESSION */ |
2534 | if (test_and_clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION, | |
1a47e7a6 | 2535 | &clp->cl_state)) { |
8ed27d4f | 2536 | section = "bind conn to session"; |
a9e64442 WAA |
2537 | status = nfs4_bind_conn_to_session(clp); |
2538 | if (status < 0) | |
2539 | goto out_error; | |
bf674c82 | 2540 | continue; |
a9e64442 WAA |
2541 | } |
2542 | ||
5df904ae TM |
2543 | if (test_and_clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state)) { |
2544 | section = "check lease"; | |
2545 | status = nfs4_check_lease(clp); | |
2546 | if (status < 0) | |
2547 | goto out_error; | |
8faaa6d5 | 2548 | continue; |
c9fdeb28 CL |
2549 | } |
2550 | ||
2551 | if (test_and_clear_bit(NFS4CLNT_MOVED, &clp->cl_state)) { | |
2552 | section = "migration"; | |
2553 | status = nfs4_handle_migration(clp); | |
2554 | if (status < 0) | |
2555 | goto out_error; | |
5df904ae TM |
2556 | } |
2557 | ||
b7f7a66e CL |
2558 | if (test_and_clear_bit(NFS4CLNT_LEASE_MOVED, &clp->cl_state)) { |
2559 | section = "lease moved"; | |
2560 | status = nfs4_handle_lease_moved(clp); | |
2561 | if (status < 0) | |
2562 | goto out_error; | |
2563 | } | |
2564 | ||
b79a4a1b | 2565 | /* First recover reboot state... */ |
e345e88a | 2566 | if (test_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) { |
8ed27d4f | 2567 | section = "reclaim reboot"; |
591d71cb | 2568 | status = nfs4_do_reclaim(clp, |
c48f4f35 | 2569 | clp->cl_mvops->reboot_recovery_ops); |
df817ba3 | 2570 | if (status == -EAGAIN) |
b6d408ba TM |
2571 | continue; |
2572 | if (status < 0) | |
2573 | goto out_error; | |
df817ba3 | 2574 | nfs4_state_end_reclaim_reboot(clp); |
02860014 TM |
2575 | } |
2576 | ||
45870d69 TM |
2577 | /* Detect expired delegations... */ |
2578 | if (test_and_clear_bit(NFS4CLNT_DELEGATION_EXPIRED, &clp->cl_state)) { | |
2579 | section = "detect expired delegations"; | |
2580 | nfs_reap_expired_delegations(clp); | |
2581 | continue; | |
2582 | } | |
2583 | ||
b79a4a1b TM |
2584 | /* Now recover expired state... */ |
2585 | if (test_and_clear_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) { | |
8ed27d4f | 2586 | section = "reclaim nograce"; |
591d71cb | 2587 | status = nfs4_do_reclaim(clp, |
c48f4f35 | 2588 | clp->cl_mvops->nograce_recovery_ops); |
df817ba3 | 2589 | if (status == -EAGAIN) |
b6d408ba TM |
2590 | continue; |
2591 | if (status < 0) | |
b79a4a1b | 2592 | goto out_error; |
1da177e4 | 2593 | } |
707fb4b3 | 2594 | |
5601a00d | 2595 | nfs4_end_drain_session(clp); |
707fb4b3 TM |
2596 | if (test_and_clear_bit(NFS4CLNT_DELEGRETURN, &clp->cl_state)) { |
2597 | nfs_client_return_marked_delegations(clp); | |
2598 | continue; | |
2599 | } | |
e005e804 TM |
2600 | |
2601 | nfs4_clear_state_manager_bit(clp); | |
f3c76491 TM |
2602 | /* Did we race with an attempt to give us more work? */ |
2603 | if (clp->cl_state == 0) | |
2604 | break; | |
2605 | if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) != 0) | |
2606 | break; | |
212bf41d | 2607 | } while (refcount_read(&clp->cl_count) > 1); |
e005e804 | 2608 | return; |
1da177e4 | 2609 | out_error: |
8ed27d4f WAA |
2610 | if (strlen(section)) |
2611 | section_sep = ": "; | |
2612 | pr_warn_ratelimited("NFS: state manager%s%s failed on NFSv4 server %s" | |
2613 | " with error %d\n", section_sep, section, | |
2614 | clp->cl_hostname, -status); | |
ffe5a830 | 2615 | ssleep(1); |
5601a00d | 2616 | nfs4_end_drain_session(clp); |
e005e804 TM |
2617 | nfs4_clear_state_manager_bit(clp); |
2618 | } | |
2619 | ||
2620 | static int nfs4_run_state_manager(void *ptr) | |
2621 | { | |
2622 | struct nfs_client *clp = ptr; | |
2623 | ||
2624 | allow_signal(SIGKILL); | |
2625 | nfs4_state_manager(clp); | |
2626 | nfs_put_client(clp); | |
2627 | module_put_and_exit(0); | |
2628 | return 0; | |
1da177e4 LT |
2629 | } |
2630 | ||
2631 | /* | |
2632 | * Local variables: | |
2633 | * c-basic-offset: 8 | |
2634 | * End: | |
2635 | */ |