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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * fs/nfs/nfs4state.c | |
3 | * | |
4 | * Client-side XDR for NFSv4. | |
5 | * | |
6 | * Copyright (c) 2002 The Regents of the University of Michigan. | |
7 | * All rights reserved. | |
8 | * | |
9 | * Kendrick Smith <kmsmith@umich.edu> | |
10 | * | |
11 | * Redistribution and use in source and binary forms, with or without | |
12 | * modification, are permitted provided that the following conditions | |
13 | * are met: | |
14 | * | |
15 | * 1. Redistributions of source code must retain the above copyright | |
16 | * notice, this list of conditions and the following disclaimer. | |
17 | * 2. Redistributions in binary form must reproduce the above copyright | |
18 | * notice, this list of conditions and the following disclaimer in the | |
19 | * documentation and/or other materials provided with the distribution. | |
20 | * 3. Neither the name of the University nor the names of its | |
21 | * contributors may be used to endorse or promote products derived | |
22 | * from this software without specific prior written permission. | |
23 | * | |
24 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
25 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
26 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
27 | * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
28 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
29 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
30 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR | |
31 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
32 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
33 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
34 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
35 | * | |
36 | * Implementation of the NFSv4 state model. For the time being, | |
37 | * this is minimal, but will be made much more complex in a | |
38 | * subsequent patch. | |
39 | */ | |
40 | ||
6f43ddcc | 41 | #include <linux/kernel.h> |
1da177e4 | 42 | #include <linux/slab.h> |
b89f4321 | 43 | #include <linux/fs.h> |
1da177e4 | 44 | #include <linux/nfs_fs.h> |
5043e900 TM |
45 | #include <linux/kthread.h> |
46 | #include <linux/module.h> | |
9f958ab8 | 47 | #include <linux/random.h> |
8c7597f6 | 48 | #include <linux/ratelimit.h> |
1da177e4 LT |
49 | #include <linux/workqueue.h> |
50 | #include <linux/bitops.h> | |
0aaaf5c4 | 51 | #include <linux/jiffies.h> |
1da177e4 | 52 | |
05f4c350 CL |
53 | #include <linux/sunrpc/clnt.h> |
54 | ||
4ce79717 | 55 | #include "nfs4_fs.h" |
1da177e4 LT |
56 | #include "callback.h" |
57 | #include "delegation.h" | |
24c8dbbb | 58 | #include "internal.h" |
40c64c26 | 59 | #include "nfs4idmap.h" |
76e697ba | 60 | #include "nfs4session.h" |
974cec8c | 61 | #include "pnfs.h" |
bbe0a3aa | 62 | #include "netns.h" |
1da177e4 | 63 | |
e3c0fb7e CL |
64 | #define NFSDBG_FACILITY NFSDBG_STATE |
65 | ||
1da177e4 LT |
66 | #define OPENOWNER_POOL_SIZE 8 |
67 | ||
93b717fd | 68 | const nfs4_stateid zero_stateid = { |
e0714ec4 | 69 | { .data = { 0 } }, |
93b717fd TM |
70 | .type = NFS4_SPECIAL_STATEID_TYPE, |
71 | }; | |
fcd8843c TM |
72 | const nfs4_stateid invalid_stateid = { |
73 | { | |
445f288d TM |
74 | /* Funky initialiser keeps older gcc versions happy */ |
75 | .data = { 0xff, 0xff, 0xff, 0xff, 0 }, | |
fcd8843c TM |
76 | }, |
77 | .type = NFS4_INVALID_STATEID_TYPE, | |
78 | }; | |
79 | ||
05f4c350 | 80 | static DEFINE_MUTEX(nfs_clid_init_mutex); |
1da177e4 | 81 | |
591d71cb | 82 | int nfs4_init_clientid(struct nfs_client *clp, struct rpc_cred *cred) |
1da177e4 | 83 | { |
fd954ae1 TM |
84 | struct nfs4_setclientid_res clid = { |
85 | .clientid = clp->cl_clientid, | |
86 | .confirm = clp->cl_confirm, | |
87 | }; | |
f738f517 CL |
88 | unsigned short port; |
89 | int status; | |
bbe0a3aa | 90 | struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); |
f738f517 | 91 | |
fd954ae1 TM |
92 | if (test_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state)) |
93 | goto do_confirm; | |
bbe0a3aa | 94 | port = nn->nfs_callback_tcpport; |
f738f517 | 95 | if (clp->cl_addr.ss_family == AF_INET6) |
29dcc16a | 96 | port = nn->nfs_callback_tcpport6; |
f738f517 | 97 | |
bb8b27e5 TM |
98 | status = nfs4_proc_setclientid(clp, NFS4_CALLBACK, port, cred, &clid); |
99 | if (status != 0) | |
100 | goto out; | |
fd954ae1 TM |
101 | clp->cl_clientid = clid.clientid; |
102 | clp->cl_confirm = clid.confirm; | |
103 | set_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); | |
104 | do_confirm: | |
bb8b27e5 TM |
105 | status = nfs4_proc_setclientid_confirm(clp, &clid, cred); |
106 | if (status != 0) | |
107 | goto out; | |
fd954ae1 | 108 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
bb8b27e5 TM |
109 | nfs4_schedule_state_renewal(clp); |
110 | out: | |
1da177e4 LT |
111 | return status; |
112 | } | |
113 | ||
05f4c350 CL |
114 | /** |
115 | * nfs40_discover_server_trunking - Detect server IP address trunking (mv0) | |
116 | * | |
117 | * @clp: nfs_client under test | |
118 | * @result: OUT: found nfs_client, or clp | |
119 | * @cred: credential to use for trunking test | |
120 | * | |
121 | * Returns zero, a negative errno, or a negative NFS4ERR status. | |
122 | * If zero is returned, an nfs_client pointer is planted in | |
123 | * "result". | |
124 | * | |
125 | * Note: The returned client may not yet be marked ready. | |
126 | */ | |
127 | int nfs40_discover_server_trunking(struct nfs_client *clp, | |
128 | struct nfs_client **result, | |
129 | struct rpc_cred *cred) | |
130 | { | |
131 | struct nfs4_setclientid_res clid = { | |
132 | .clientid = clp->cl_clientid, | |
133 | .confirm = clp->cl_confirm, | |
134 | }; | |
9f62387d | 135 | struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); |
05f4c350 CL |
136 | unsigned short port; |
137 | int status; | |
138 | ||
9f62387d | 139 | port = nn->nfs_callback_tcpport; |
05f4c350 | 140 | if (clp->cl_addr.ss_family == AF_INET6) |
9f62387d | 141 | port = nn->nfs_callback_tcpport6; |
05f4c350 CL |
142 | |
143 | status = nfs4_proc_setclientid(clp, NFS4_CALLBACK, port, cred, &clid); | |
144 | if (status != 0) | |
145 | goto out; | |
146 | clp->cl_clientid = clid.clientid; | |
147 | clp->cl_confirm = clid.confirm; | |
148 | ||
149 | status = nfs40_walk_client_list(clp, result, cred); | |
202c312d | 150 | if (status == 0) { |
05f4c350 CL |
151 | /* Sustain the lease, even if it's empty. If the clientid4 |
152 | * goes stale it's of no use for trunking discovery. */ | |
153 | nfs4_schedule_state_renewal(*result); | |
05f4c350 | 154 | } |
05f4c350 CL |
155 | out: |
156 | return status; | |
157 | } | |
158 | ||
a7b72103 | 159 | struct rpc_cred *nfs4_get_machine_cred_locked(struct nfs_client *clp) |
a2b2bb88 TM |
160 | { |
161 | struct rpc_cred *cred = NULL; | |
162 | ||
a2b2bb88 TM |
163 | if (clp->cl_machine_cred != NULL) |
164 | cred = get_rpccred(clp->cl_machine_cred); | |
a2b2bb88 TM |
165 | return cred; |
166 | } | |
167 | ||
d688f7b8 CL |
168 | static void nfs4_root_machine_cred(struct nfs_client *clp) |
169 | { | |
170 | struct rpc_cred *cred, *new; | |
171 | ||
172 | new = rpc_lookup_machine_cred(NULL); | |
173 | spin_lock(&clp->cl_lock); | |
174 | cred = clp->cl_machine_cred; | |
175 | clp->cl_machine_cred = new; | |
176 | spin_unlock(&clp->cl_lock); | |
177 | if (cred != NULL) | |
178 | put_rpccred(cred); | |
179 | } | |
180 | ||
24d292b8 CL |
181 | static struct rpc_cred * |
182 | nfs4_get_renew_cred_server_locked(struct nfs_server *server) | |
b4454fe1 | 183 | { |
24d292b8 | 184 | struct rpc_cred *cred = NULL; |
b4454fe1 | 185 | struct nfs4_state_owner *sp; |
9f958ab8 | 186 | struct rb_node *pos; |
b4454fe1 | 187 | |
24d292b8 CL |
188 | for (pos = rb_first(&server->state_owners); |
189 | pos != NULL; | |
190 | pos = rb_next(pos)) { | |
191 | sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); | |
b4454fe1 TM |
192 | if (list_empty(&sp->so_states)) |
193 | continue; | |
194 | cred = get_rpccred(sp->so_cred); | |
195 | break; | |
196 | } | |
197 | return cred; | |
198 | } | |
199 | ||
24d292b8 CL |
200 | /** |
201 | * nfs4_get_renew_cred_locked - Acquire credential for a renew operation | |
202 | * @clp: client state handle | |
203 | * | |
204 | * Returns an rpc_cred with reference count bumped, or NULL. | |
205 | * Caller must hold clp->cl_lock. | |
206 | */ | |
207 | struct rpc_cred *nfs4_get_renew_cred_locked(struct nfs_client *clp) | |
208 | { | |
209 | struct rpc_cred *cred = NULL; | |
210 | struct nfs_server *server; | |
211 | ||
e49a29bd SP |
212 | /* Use machine credentials if available */ |
213 | cred = nfs4_get_machine_cred_locked(clp); | |
214 | if (cred != NULL) | |
215 | goto out; | |
216 | ||
24d292b8 CL |
217 | rcu_read_lock(); |
218 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { | |
219 | cred = nfs4_get_renew_cred_server_locked(server); | |
220 | if (cred != NULL) | |
221 | break; | |
222 | } | |
223 | rcu_read_unlock(); | |
e49a29bd SP |
224 | |
225 | out: | |
24d292b8 CL |
226 | return cred; |
227 | } | |
228 | ||
62f288a0 | 229 | static void nfs4_end_drain_slot_table(struct nfs4_slot_table *tbl) |
9dfdf404 | 230 | { |
774d5f14 | 231 | if (test_and_clear_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state)) { |
961a828d | 232 | spin_lock(&tbl->slot_tbl_lock); |
b75ad4cd | 233 | nfs41_wake_slot_table(tbl); |
961a828d | 234 | spin_unlock(&tbl->slot_tbl_lock); |
689cf5c1 | 235 | } |
9dfdf404 RL |
236 | } |
237 | ||
62f288a0 AA |
238 | static void nfs4_end_drain_session(struct nfs_client *clp) |
239 | { | |
240 | struct nfs4_session *ses = clp->cl_session; | |
241 | ||
2cf8bca8 CL |
242 | if (clp->cl_slot_tbl) { |
243 | nfs4_end_drain_slot_table(clp->cl_slot_tbl); | |
244 | return; | |
245 | } | |
246 | ||
62f288a0 AA |
247 | if (ses != NULL) { |
248 | nfs4_end_drain_slot_table(&ses->bc_slot_table); | |
249 | nfs4_end_drain_slot_table(&ses->fc_slot_table); | |
250 | } | |
251 | } | |
252 | ||
774d5f14 | 253 | static int nfs4_drain_slot_tbl(struct nfs4_slot_table *tbl) |
9dfdf404 | 254 | { |
774d5f14 | 255 | set_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state); |
9dfdf404 | 256 | spin_lock(&tbl->slot_tbl_lock); |
b6bf6e7d | 257 | if (tbl->highest_used_slotid != NFS4_NO_SLOT) { |
16735d02 | 258 | reinit_completion(&tbl->complete); |
9dfdf404 | 259 | spin_unlock(&tbl->slot_tbl_lock); |
42acd021 | 260 | return wait_for_completion_interruptible(&tbl->complete); |
9dfdf404 RL |
261 | } |
262 | spin_unlock(&tbl->slot_tbl_lock); | |
263 | return 0; | |
264 | } | |
265 | ||
42acd021 AA |
266 | static int nfs4_begin_drain_session(struct nfs_client *clp) |
267 | { | |
268 | struct nfs4_session *ses = clp->cl_session; | |
269 | int ret = 0; | |
270 | ||
2cf8bca8 CL |
271 | if (clp->cl_slot_tbl) |
272 | return nfs4_drain_slot_tbl(clp->cl_slot_tbl); | |
273 | ||
42acd021 | 274 | /* back channel */ |
774d5f14 | 275 | ret = nfs4_drain_slot_tbl(&ses->bc_slot_table); |
42acd021 AA |
276 | if (ret) |
277 | return ret; | |
278 | /* fore channel */ | |
774d5f14 | 279 | return nfs4_drain_slot_tbl(&ses->fc_slot_table); |
42acd021 AA |
280 | } |
281 | ||
c9fdeb28 CL |
282 | #if defined(CONFIG_NFS_V4_1) |
283 | ||
2cf8bca8 CL |
284 | static int nfs41_setup_state_renewal(struct nfs_client *clp) |
285 | { | |
286 | int status; | |
287 | struct nfs_fsinfo fsinfo; | |
fb10fb67 | 288 | unsigned long now; |
2cf8bca8 CL |
289 | |
290 | if (!test_bit(NFS_CS_CHECK_LEASE_TIME, &clp->cl_res_state)) { | |
291 | nfs4_schedule_state_renewal(clp); | |
292 | return 0; | |
293 | } | |
294 | ||
fb10fb67 | 295 | now = jiffies; |
2cf8bca8 CL |
296 | status = nfs4_proc_get_lease_time(clp, &fsinfo); |
297 | if (status == 0) { | |
fb10fb67 | 298 | nfs4_set_lease_period(clp, fsinfo.lease_time * HZ, now); |
2cf8bca8 CL |
299 | nfs4_schedule_state_renewal(clp); |
300 | } | |
301 | ||
302 | return status; | |
303 | } | |
304 | ||
bda197f5 TM |
305 | static void nfs41_finish_session_reset(struct nfs_client *clp) |
306 | { | |
307 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); | |
308 | clear_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); | |
309 | /* create_session negotiated new slot table */ | |
bda197f5 TM |
310 | clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); |
311 | nfs41_setup_state_renewal(clp); | |
312 | } | |
313 | ||
4d643d1d AA |
314 | int nfs41_init_clientid(struct nfs_client *clp, struct rpc_cred *cred) |
315 | { | |
316 | int status; | |
317 | ||
fd954ae1 TM |
318 | if (test_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state)) |
319 | goto do_confirm; | |
4d643d1d | 320 | status = nfs4_proc_exchange_id(clp, cred); |
9430fb6b RL |
321 | if (status != 0) |
322 | goto out; | |
fd954ae1 TM |
323 | set_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
324 | do_confirm: | |
848f5bda | 325 | status = nfs4_proc_create_session(clp, cred); |
9430fb6b RL |
326 | if (status != 0) |
327 | goto out; | |
bda197f5 | 328 | nfs41_finish_session_reset(clp); |
9430fb6b RL |
329 | nfs_mark_client_ready(clp, NFS_CS_READY); |
330 | out: | |
4d643d1d AA |
331 | return status; |
332 | } | |
333 | ||
05f4c350 CL |
334 | /** |
335 | * nfs41_discover_server_trunking - Detect server IP address trunking (mv1) | |
336 | * | |
337 | * @clp: nfs_client under test | |
338 | * @result: OUT: found nfs_client, or clp | |
339 | * @cred: credential to use for trunking test | |
340 | * | |
341 | * Returns NFS4_OK, a negative errno, or a negative NFS4ERR status. | |
342 | * If NFS4_OK is returned, an nfs_client pointer is planted in | |
343 | * "result". | |
344 | * | |
345 | * Note: The returned client may not yet be marked ready. | |
346 | */ | |
347 | int nfs41_discover_server_trunking(struct nfs_client *clp, | |
348 | struct nfs_client **result, | |
349 | struct rpc_cred *cred) | |
350 | { | |
351 | int status; | |
352 | ||
353 | status = nfs4_proc_exchange_id(clp, cred); | |
354 | if (status != NFS4_OK) | |
355 | return status; | |
356 | ||
48d66b97 TM |
357 | status = nfs41_walk_client_list(clp, result, cred); |
358 | if (status < 0) | |
359 | return status; | |
360 | if (clp != *result) | |
361 | return 0; | |
362 | ||
8dcbec6d CL |
363 | /* |
364 | * Purge state if the client id was established in a prior | |
365 | * instance and the client id could not have arrived on the | |
366 | * server via Transparent State Migration. | |
367 | */ | |
368 | if (clp->cl_exchange_flags & EXCHGID4_FLAG_CONFIRMED_R) { | |
369 | if (!test_bit(NFS_CS_TSM_POSSIBLE, &clp->cl_flags)) | |
370 | set_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state); | |
371 | else | |
372 | set_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); | |
373 | } | |
48d66b97 TM |
374 | nfs4_schedule_state_manager(clp); |
375 | status = nfs_wait_client_init_complete(clp); | |
376 | if (status < 0) | |
377 | nfs_put_client(clp); | |
378 | return status; | |
05f4c350 CL |
379 | } |
380 | ||
b4b82607 AA |
381 | #endif /* CONFIG_NFS_V4_1 */ |
382 | ||
24d292b8 | 383 | /** |
73d8bde5 | 384 | * nfs4_get_clid_cred - Acquire credential for a setclientid operation |
24d292b8 CL |
385 | * @clp: client state handle |
386 | * | |
387 | * Returns an rpc_cred with reference count bumped, or NULL. | |
388 | */ | |
73d8bde5 | 389 | struct rpc_cred *nfs4_get_clid_cred(struct nfs_client *clp) |
24d292b8 | 390 | { |
a2b2bb88 | 391 | struct rpc_cred *cred; |
286d7d6a | 392 | |
6dc9d57a TM |
393 | spin_lock(&clp->cl_lock); |
394 | cred = nfs4_get_machine_cred_locked(clp); | |
24d292b8 | 395 | spin_unlock(&clp->cl_lock); |
a2b2bb88 | 396 | return cred; |
286d7d6a TM |
397 | } |
398 | ||
1da177e4 | 399 | static struct nfs4_state_owner * |
24d292b8 | 400 | nfs4_find_state_owner_locked(struct nfs_server *server, struct rpc_cred *cred) |
1da177e4 | 401 | { |
24d292b8 | 402 | struct rb_node **p = &server->state_owners.rb_node, |
9f958ab8 | 403 | *parent = NULL; |
414adf14 | 404 | struct nfs4_state_owner *sp; |
1da177e4 | 405 | |
9f958ab8 TM |
406 | while (*p != NULL) { |
407 | parent = *p; | |
24d292b8 | 408 | sp = rb_entry(parent, struct nfs4_state_owner, so_server_node); |
9f958ab8 TM |
409 | |
410 | if (cred < sp->so_cred) | |
411 | p = &parent->rb_left; | |
412 | else if (cred > sp->so_cred) | |
413 | p = &parent->rb_right; | |
414 | else { | |
0aaaf5c4 CL |
415 | if (!list_empty(&sp->so_lru)) |
416 | list_del_init(&sp->so_lru); | |
9f958ab8 | 417 | atomic_inc(&sp->so_count); |
414adf14 | 418 | return sp; |
9f958ab8 | 419 | } |
1da177e4 | 420 | } |
414adf14 | 421 | return NULL; |
1da177e4 LT |
422 | } |
423 | ||
9f958ab8 | 424 | static struct nfs4_state_owner * |
24d292b8 | 425 | nfs4_insert_state_owner_locked(struct nfs4_state_owner *new) |
9f958ab8 | 426 | { |
24d292b8 CL |
427 | struct nfs_server *server = new->so_server; |
428 | struct rb_node **p = &server->state_owners.rb_node, | |
9f958ab8 TM |
429 | *parent = NULL; |
430 | struct nfs4_state_owner *sp; | |
9157c31d | 431 | int err; |
9f958ab8 TM |
432 | |
433 | while (*p != NULL) { | |
434 | parent = *p; | |
24d292b8 | 435 | sp = rb_entry(parent, struct nfs4_state_owner, so_server_node); |
9f958ab8 TM |
436 | |
437 | if (new->so_cred < sp->so_cred) | |
438 | p = &parent->rb_left; | |
439 | else if (new->so_cred > sp->so_cred) | |
440 | p = &parent->rb_right; | |
441 | else { | |
0aaaf5c4 CL |
442 | if (!list_empty(&sp->so_lru)) |
443 | list_del_init(&sp->so_lru); | |
9f958ab8 TM |
444 | atomic_inc(&sp->so_count); |
445 | return sp; | |
446 | } | |
447 | } | |
48c22eb2 | 448 | err = ida_get_new(&server->openowner_id, &new->so_seqid.owner_id); |
9157c31d TM |
449 | if (err) |
450 | return ERR_PTR(err); | |
24d292b8 CL |
451 | rb_link_node(&new->so_server_node, parent, p); |
452 | rb_insert_color(&new->so_server_node, &server->state_owners); | |
9f958ab8 TM |
453 | return new; |
454 | } | |
455 | ||
456 | static void | |
24d292b8 | 457 | nfs4_remove_state_owner_locked(struct nfs4_state_owner *sp) |
9f958ab8 | 458 | { |
24d292b8 CL |
459 | struct nfs_server *server = sp->so_server; |
460 | ||
461 | if (!RB_EMPTY_NODE(&sp->so_server_node)) | |
462 | rb_erase(&sp->so_server_node, &server->state_owners); | |
48c22eb2 | 463 | ida_remove(&server->openowner_id, sp->so_seqid.owner_id); |
9f958ab8 TM |
464 | } |
465 | ||
7ba127ab TM |
466 | static void |
467 | nfs4_init_seqid_counter(struct nfs_seqid_counter *sc) | |
468 | { | |
95b72eb0 | 469 | sc->create_time = ktime_get(); |
7ba127ab TM |
470 | sc->flags = 0; |
471 | sc->counter = 0; | |
472 | spin_lock_init(&sc->lock); | |
473 | INIT_LIST_HEAD(&sc->list); | |
474 | rpc_init_wait_queue(&sc->wait, "Seqid_waitqueue"); | |
475 | } | |
476 | ||
477 | static void | |
478 | nfs4_destroy_seqid_counter(struct nfs_seqid_counter *sc) | |
479 | { | |
480 | rpc_destroy_wait_queue(&sc->wait); | |
481 | } | |
482 | ||
1da177e4 LT |
483 | /* |
484 | * nfs4_alloc_state_owner(): this is called on the OPEN or CREATE path to | |
485 | * create a new state_owner. | |
486 | * | |
487 | */ | |
488 | static struct nfs4_state_owner * | |
d1e284d5 TM |
489 | nfs4_alloc_state_owner(struct nfs_server *server, |
490 | struct rpc_cred *cred, | |
491 | gfp_t gfp_flags) | |
1da177e4 LT |
492 | { |
493 | struct nfs4_state_owner *sp; | |
494 | ||
d1e284d5 | 495 | sp = kzalloc(sizeof(*sp), gfp_flags); |
1da177e4 LT |
496 | if (!sp) |
497 | return NULL; | |
d1e284d5 TM |
498 | sp->so_server = server; |
499 | sp->so_cred = get_rpccred(cred); | |
ec073428 | 500 | spin_lock_init(&sp->so_lock); |
1da177e4 | 501 | INIT_LIST_HEAD(&sp->so_states); |
7ba127ab | 502 | nfs4_init_seqid_counter(&sp->so_seqid); |
1da177e4 | 503 | atomic_set(&sp->so_count, 1); |
0aaaf5c4 | 504 | INIT_LIST_HEAD(&sp->so_lru); |
c137afab | 505 | seqcount_init(&sp->so_reclaim_seqcount); |
65b62a29 | 506 | mutex_init(&sp->so_delegreturn_mutex); |
1da177e4 LT |
507 | return sp; |
508 | } | |
509 | ||
1d2e88e7 | 510 | static void |
86cfb041 | 511 | nfs4_reset_state_owner(struct nfs4_state_owner *sp) |
1da177e4 | 512 | { |
86cfb041 N |
513 | /* This state_owner is no longer usable, but must |
514 | * remain in place so that state recovery can find it | |
515 | * and the opens associated with it. | |
516 | * It may also be used for new 'open' request to | |
517 | * return a delegation to the server. | |
518 | * So update the 'create_time' so that it looks like | |
519 | * a new state_owner. This will cause the server to | |
520 | * request an OPEN_CONFIRM to start a new sequence. | |
521 | */ | |
522 | sp->so_seqid.create_time = ktime_get(); | |
1da177e4 LT |
523 | } |
524 | ||
0aaaf5c4 CL |
525 | static void nfs4_free_state_owner(struct nfs4_state_owner *sp) |
526 | { | |
7ba127ab | 527 | nfs4_destroy_seqid_counter(&sp->so_seqid); |
0aaaf5c4 CL |
528 | put_rpccred(sp->so_cred); |
529 | kfree(sp); | |
530 | } | |
531 | ||
532 | static void nfs4_gc_state_owners(struct nfs_server *server) | |
533 | { | |
534 | struct nfs_client *clp = server->nfs_client; | |
535 | struct nfs4_state_owner *sp, *tmp; | |
536 | unsigned long time_min, time_max; | |
537 | LIST_HEAD(doomed); | |
538 | ||
539 | spin_lock(&clp->cl_lock); | |
540 | time_max = jiffies; | |
541 | time_min = (long)time_max - (long)clp->cl_lease_time; | |
542 | list_for_each_entry_safe(sp, tmp, &server->state_owners_lru, so_lru) { | |
543 | /* NB: LRU is sorted so that oldest is at the head */ | |
544 | if (time_in_range(sp->so_expires, time_min, time_max)) | |
545 | break; | |
546 | list_move(&sp->so_lru, &doomed); | |
547 | nfs4_remove_state_owner_locked(sp); | |
548 | } | |
549 | spin_unlock(&clp->cl_lock); | |
550 | ||
551 | list_for_each_entry_safe(sp, tmp, &doomed, so_lru) { | |
552 | list_del(&sp->so_lru); | |
553 | nfs4_free_state_owner(sp); | |
554 | } | |
555 | } | |
556 | ||
24d292b8 CL |
557 | /** |
558 | * nfs4_get_state_owner - Look up a state owner given a credential | |
559 | * @server: nfs_server to search | |
560 | * @cred: RPC credential to match | |
561 | * | |
562 | * Returns a pointer to an instantiated nfs4_state_owner struct, or NULL. | |
563 | */ | |
564 | struct nfs4_state_owner *nfs4_get_state_owner(struct nfs_server *server, | |
d1e284d5 TM |
565 | struct rpc_cred *cred, |
566 | gfp_t gfp_flags) | |
1da177e4 | 567 | { |
7539bbab | 568 | struct nfs_client *clp = server->nfs_client; |
1da177e4 LT |
569 | struct nfs4_state_owner *sp, *new; |
570 | ||
1da177e4 | 571 | spin_lock(&clp->cl_lock); |
24d292b8 | 572 | sp = nfs4_find_state_owner_locked(server, cred); |
1da177e4 | 573 | spin_unlock(&clp->cl_lock); |
1da177e4 | 574 | if (sp != NULL) |
0aaaf5c4 | 575 | goto out; |
d1e284d5 | 576 | new = nfs4_alloc_state_owner(server, cred, gfp_flags); |
9f958ab8 | 577 | if (new == NULL) |
0aaaf5c4 | 578 | goto out; |
9157c31d TM |
579 | do { |
580 | if (ida_pre_get(&server->openowner_id, gfp_flags) == 0) | |
581 | break; | |
582 | spin_lock(&clp->cl_lock); | |
583 | sp = nfs4_insert_state_owner_locked(new); | |
584 | spin_unlock(&clp->cl_lock); | |
585 | } while (sp == ERR_PTR(-EAGAIN)); | |
d1e284d5 TM |
586 | if (sp != new) |
587 | nfs4_free_state_owner(new); | |
0aaaf5c4 CL |
588 | out: |
589 | nfs4_gc_state_owners(server); | |
9f958ab8 | 590 | return sp; |
1da177e4 LT |
591 | } |
592 | ||
24d292b8 CL |
593 | /** |
594 | * nfs4_put_state_owner - Release a nfs4_state_owner | |
595 | * @sp: state owner data to release | |
7bf97bc2 TM |
596 | * |
597 | * Note that we keep released state owners on an LRU | |
598 | * list. | |
599 | * This caches valid state owners so that they can be | |
600 | * reused, to avoid the OPEN_CONFIRM on minor version 0. | |
601 | * It also pins the uniquifier of dropped state owners for | |
602 | * a while, to ensure that those state owner names are | |
603 | * never reused. | |
24d292b8 | 604 | */ |
1da177e4 LT |
605 | void nfs4_put_state_owner(struct nfs4_state_owner *sp) |
606 | { | |
0aaaf5c4 CL |
607 | struct nfs_server *server = sp->so_server; |
608 | struct nfs_client *clp = server->nfs_client; | |
1da177e4 LT |
609 | |
610 | if (!atomic_dec_and_lock(&sp->so_count, &clp->cl_lock)) | |
611 | return; | |
0aaaf5c4 | 612 | |
7bf97bc2 TM |
613 | sp->so_expires = jiffies; |
614 | list_add_tail(&sp->so_lru, &server->state_owners_lru); | |
615 | spin_unlock(&clp->cl_lock); | |
0aaaf5c4 CL |
616 | } |
617 | ||
618 | /** | |
619 | * nfs4_purge_state_owners - Release all cached state owners | |
620 | * @server: nfs_server with cached state owners to release | |
621 | * | |
622 | * Called at umount time. Remaining state owners will be on | |
623 | * the LRU with ref count of zero. | |
624 | */ | |
625 | void nfs4_purge_state_owners(struct nfs_server *server) | |
626 | { | |
627 | struct nfs_client *clp = server->nfs_client; | |
628 | struct nfs4_state_owner *sp, *tmp; | |
629 | LIST_HEAD(doomed); | |
630 | ||
631 | spin_lock(&clp->cl_lock); | |
632 | list_for_each_entry_safe(sp, tmp, &server->state_owners_lru, so_lru) { | |
633 | list_move(&sp->so_lru, &doomed); | |
634 | nfs4_remove_state_owner_locked(sp); | |
635 | } | |
1da177e4 | 636 | spin_unlock(&clp->cl_lock); |
0aaaf5c4 CL |
637 | |
638 | list_for_each_entry_safe(sp, tmp, &doomed, so_lru) { | |
639 | list_del(&sp->so_lru); | |
640 | nfs4_free_state_owner(sp); | |
641 | } | |
1da177e4 LT |
642 | } |
643 | ||
644 | static struct nfs4_state * | |
645 | nfs4_alloc_open_state(void) | |
646 | { | |
647 | struct nfs4_state *state; | |
648 | ||
8535b2be | 649 | state = kzalloc(sizeof(*state), GFP_NOFS); |
1da177e4 LT |
650 | if (!state) |
651 | return NULL; | |
1da177e4 LT |
652 | atomic_set(&state->count, 1); |
653 | INIT_LIST_HEAD(&state->lock_states); | |
8d0a8a9d | 654 | spin_lock_init(&state->state_lock); |
8bda4e4c | 655 | seqlock_init(&state->seqlock); |
c9399f21 | 656 | init_waitqueue_head(&state->waitq); |
1da177e4 LT |
657 | return state; |
658 | } | |
659 | ||
4cecb76f | 660 | void |
dc0b027d | 661 | nfs4_state_set_mode_locked(struct nfs4_state *state, fmode_t fmode) |
4cecb76f | 662 | { |
dc0b027d | 663 | if (state->state == fmode) |
4cecb76f TM |
664 | return; |
665 | /* NB! List reordering - see the reclaim code for why. */ | |
dc0b027d TM |
666 | if ((fmode & FMODE_WRITE) != (state->state & FMODE_WRITE)) { |
667 | if (fmode & FMODE_WRITE) | |
4cecb76f TM |
668 | list_move(&state->open_states, &state->owner->so_states); |
669 | else | |
670 | list_move_tail(&state->open_states, &state->owner->so_states); | |
671 | } | |
dc0b027d | 672 | state->state = fmode; |
4cecb76f TM |
673 | } |
674 | ||
1da177e4 LT |
675 | static struct nfs4_state * |
676 | __nfs4_find_state_byowner(struct inode *inode, struct nfs4_state_owner *owner) | |
677 | { | |
678 | struct nfs_inode *nfsi = NFS_I(inode); | |
679 | struct nfs4_state *state; | |
680 | ||
681 | list_for_each_entry(state, &nfsi->open_states, inode_states) { | |
1c816efa | 682 | if (state->owner != owner) |
1da177e4 | 683 | continue; |
5d422301 TM |
684 | if (!nfs4_valid_open_stateid(state)) |
685 | continue; | |
1c816efa | 686 | if (atomic_inc_not_zero(&state->count)) |
1da177e4 | 687 | return state; |
1da177e4 LT |
688 | } |
689 | return NULL; | |
690 | } | |
691 | ||
1da177e4 LT |
692 | static void |
693 | nfs4_free_open_state(struct nfs4_state *state) | |
694 | { | |
695 | kfree(state); | |
696 | } | |
697 | ||
698 | struct nfs4_state * | |
699 | nfs4_get_open_state(struct inode *inode, struct nfs4_state_owner *owner) | |
700 | { | |
701 | struct nfs4_state *state, *new; | |
702 | struct nfs_inode *nfsi = NFS_I(inode); | |
703 | ||
704 | spin_lock(&inode->i_lock); | |
705 | state = __nfs4_find_state_byowner(inode, owner); | |
706 | spin_unlock(&inode->i_lock); | |
707 | if (state) | |
708 | goto out; | |
709 | new = nfs4_alloc_open_state(); | |
ec073428 | 710 | spin_lock(&owner->so_lock); |
1da177e4 LT |
711 | spin_lock(&inode->i_lock); |
712 | state = __nfs4_find_state_byowner(inode, owner); | |
713 | if (state == NULL && new != NULL) { | |
714 | state = new; | |
1da177e4 LT |
715 | state->owner = owner; |
716 | atomic_inc(&owner->so_count); | |
717 | list_add(&state->inode_states, &nfsi->open_states); | |
0444d76a DC |
718 | ihold(inode); |
719 | state->inode = inode; | |
1da177e4 | 720 | spin_unlock(&inode->i_lock); |
ec073428 TM |
721 | /* Note: The reclaim code dictates that we add stateless |
722 | * and read-only stateids to the end of the list */ | |
723 | list_add_tail(&state->open_states, &owner->so_states); | |
724 | spin_unlock(&owner->so_lock); | |
1da177e4 LT |
725 | } else { |
726 | spin_unlock(&inode->i_lock); | |
ec073428 | 727 | spin_unlock(&owner->so_lock); |
1da177e4 LT |
728 | if (new) |
729 | nfs4_free_open_state(new); | |
730 | } | |
731 | out: | |
732 | return state; | |
733 | } | |
734 | ||
1da177e4 LT |
735 | void nfs4_put_open_state(struct nfs4_state *state) |
736 | { | |
737 | struct inode *inode = state->inode; | |
738 | struct nfs4_state_owner *owner = state->owner; | |
739 | ||
ec073428 | 740 | if (!atomic_dec_and_lock(&state->count, &owner->so_lock)) |
1da177e4 | 741 | return; |
ec073428 | 742 | spin_lock(&inode->i_lock); |
ba683031 | 743 | list_del(&state->inode_states); |
1da177e4 | 744 | list_del(&state->open_states); |
ec073428 TM |
745 | spin_unlock(&inode->i_lock); |
746 | spin_unlock(&owner->so_lock); | |
1da177e4 | 747 | iput(inode); |
1da177e4 LT |
748 | nfs4_free_open_state(state); |
749 | nfs4_put_state_owner(owner); | |
750 | } | |
751 | ||
752 | /* | |
83c9d41e | 753 | * Close the current file. |
1da177e4 | 754 | */ |
643168c2 | 755 | static void __nfs4_close(struct nfs4_state *state, |
8535b2be | 756 | fmode_t fmode, gfp_t gfp_mask, int wait) |
1da177e4 | 757 | { |
1da177e4 | 758 | struct nfs4_state_owner *owner = state->owner; |
003707c7 | 759 | int call_close = 0; |
dc0b027d | 760 | fmode_t newstate; |
1da177e4 LT |
761 | |
762 | atomic_inc(&owner->so_count); | |
1da177e4 | 763 | /* Protect against nfs4_find_state() */ |
ec073428 | 764 | spin_lock(&owner->so_lock); |
dc0b027d | 765 | switch (fmode & (FMODE_READ | FMODE_WRITE)) { |
e7616923 TM |
766 | case FMODE_READ: |
767 | state->n_rdonly--; | |
768 | break; | |
769 | case FMODE_WRITE: | |
770 | state->n_wronly--; | |
771 | break; | |
772 | case FMODE_READ|FMODE_WRITE: | |
773 | state->n_rdwr--; | |
774 | } | |
003707c7 | 775 | newstate = FMODE_READ|FMODE_WRITE; |
e7616923 | 776 | if (state->n_rdwr == 0) { |
003707c7 | 777 | if (state->n_rdonly == 0) { |
e7616923 | 778 | newstate &= ~FMODE_READ; |
003707c7 TM |
779 | call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags); |
780 | call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); | |
781 | } | |
782 | if (state->n_wronly == 0) { | |
e7616923 | 783 | newstate &= ~FMODE_WRITE; |
003707c7 TM |
784 | call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags); |
785 | call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); | |
786 | } | |
787 | if (newstate == 0) | |
788 | clear_bit(NFS_DELEGATED_STATE, &state->flags); | |
e7616923 | 789 | } |
003707c7 | 790 | nfs4_state_set_mode_locked(state, newstate); |
ec073428 | 791 | spin_unlock(&owner->so_lock); |
4cecb76f | 792 | |
003707c7 | 793 | if (!call_close) { |
b39e625b TM |
794 | nfs4_put_open_state(state); |
795 | nfs4_put_state_owner(owner); | |
1f7977c1 TM |
796 | } else |
797 | nfs4_do_close(state, gfp_mask, wait); | |
a49c3c77 TM |
798 | } |
799 | ||
643168c2 | 800 | void nfs4_close_state(struct nfs4_state *state, fmode_t fmode) |
a49c3c77 | 801 | { |
643168c2 | 802 | __nfs4_close(state, fmode, GFP_NOFS, 0); |
a49c3c77 TM |
803 | } |
804 | ||
643168c2 | 805 | void nfs4_close_sync(struct nfs4_state *state, fmode_t fmode) |
a49c3c77 | 806 | { |
643168c2 | 807 | __nfs4_close(state, fmode, GFP_KERNEL, 1); |
1da177e4 LT |
808 | } |
809 | ||
810 | /* | |
811 | * Search the state->lock_states for an existing lock_owner | |
3f8f2548 N |
812 | * that is compatible with either of the given owners. |
813 | * If the second is non-zero, then the first refers to a Posix-lock | |
814 | * owner (current->files) and the second refers to a flock/OFD | |
815 | * owner (struct file*). In that case, prefer a match for the first | |
816 | * owner. | |
817 | * If both sorts of locks are held on the one file we cannot know | |
818 | * which stateid was intended to be used, so a "correct" choice cannot | |
819 | * be made. Failing that, a "consistent" choice is preferable. The | |
820 | * consistent choice we make is to prefer the first owner, that of a | |
821 | * Posix lock. | |
1da177e4 LT |
822 | */ |
823 | static struct nfs4_lock_state * | |
8d424431 N |
824 | __nfs4_find_lock_state(struct nfs4_state *state, |
825 | fl_owner_t fl_owner, fl_owner_t fl_owner2) | |
1da177e4 | 826 | { |
3f8f2548 | 827 | struct nfs4_lock_state *pos, *ret = NULL; |
1da177e4 | 828 | list_for_each_entry(pos, &state->lock_states, ls_locks) { |
3f8f2548 N |
829 | if (pos->ls_owner == fl_owner) { |
830 | ret = pos; | |
831 | break; | |
832 | } | |
833 | if (pos->ls_owner == fl_owner2) | |
834 | ret = pos; | |
1da177e4 | 835 | } |
3f8f2548 | 836 | if (ret) |
194bc1f4 | 837 | refcount_inc(&ret->ls_count); |
3f8f2548 | 838 | return ret; |
1da177e4 LT |
839 | } |
840 | ||
1da177e4 LT |
841 | /* |
842 | * Return a compatible lock_state. If no initialized lock_state structure | |
843 | * exists, return an uninitialized one. | |
844 | * | |
1da177e4 | 845 | */ |
8003d3c4 | 846 | static struct nfs4_lock_state *nfs4_alloc_lock_state(struct nfs4_state *state, fl_owner_t fl_owner) |
1da177e4 LT |
847 | { |
848 | struct nfs4_lock_state *lsp; | |
24d292b8 | 849 | struct nfs_server *server = state->owner->so_server; |
1da177e4 | 850 | |
8535b2be | 851 | lsp = kzalloc(sizeof(*lsp), GFP_NOFS); |
1da177e4 LT |
852 | if (lsp == NULL) |
853 | return NULL; | |
7ba127ab | 854 | nfs4_init_seqid_counter(&lsp->ls_seqid); |
194bc1f4 | 855 | refcount_set(&lsp->ls_count, 1); |
b64aec8d | 856 | lsp->ls_state = state; |
8003d3c4 | 857 | lsp->ls_owner = fl_owner; |
48c22eb2 TM |
858 | lsp->ls_seqid.owner_id = ida_simple_get(&server->lockowner_id, 0, 0, GFP_NOFS); |
859 | if (lsp->ls_seqid.owner_id < 0) | |
d2d7ce28 | 860 | goto out_free; |
8d0a8a9d | 861 | INIT_LIST_HEAD(&lsp->ls_locks); |
1da177e4 | 862 | return lsp; |
d2d7ce28 TM |
863 | out_free: |
864 | kfree(lsp); | |
865 | return NULL; | |
1da177e4 LT |
866 | } |
867 | ||
5ae67c4f | 868 | void nfs4_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp) |
9f958ab8 | 869 | { |
48c22eb2 | 870 | ida_simple_remove(&server->lockowner_id, lsp->ls_seqid.owner_id); |
7ba127ab | 871 | nfs4_destroy_seqid_counter(&lsp->ls_seqid); |
9f958ab8 TM |
872 | kfree(lsp); |
873 | } | |
874 | ||
1da177e4 LT |
875 | /* |
876 | * Return a compatible lock_state. If no initialized lock_state structure | |
877 | * exists, return an uninitialized one. | |
878 | * | |
1da177e4 | 879 | */ |
8003d3c4 | 880 | static struct nfs4_lock_state *nfs4_get_lock_state(struct nfs4_state *state, fl_owner_t owner) |
1da177e4 | 881 | { |
8d0a8a9d | 882 | struct nfs4_lock_state *lsp, *new = NULL; |
1da177e4 | 883 | |
8d0a8a9d TM |
884 | for(;;) { |
885 | spin_lock(&state->state_lock); | |
68e33bd6 | 886 | lsp = __nfs4_find_lock_state(state, owner, NULL); |
8d0a8a9d TM |
887 | if (lsp != NULL) |
888 | break; | |
889 | if (new != NULL) { | |
8d0a8a9d TM |
890 | list_add(&new->ls_locks, &state->lock_states); |
891 | set_bit(LK_STATE_IN_USE, &state->flags); | |
892 | lsp = new; | |
893 | new = NULL; | |
894 | break; | |
895 | } | |
896 | spin_unlock(&state->state_lock); | |
8003d3c4 | 897 | new = nfs4_alloc_lock_state(state, owner); |
8d0a8a9d TM |
898 | if (new == NULL) |
899 | return NULL; | |
900 | } | |
901 | spin_unlock(&state->state_lock); | |
9f958ab8 | 902 | if (new != NULL) |
5ae67c4f | 903 | nfs4_free_lock_state(state->owner->so_server, new); |
1da177e4 LT |
904 | return lsp; |
905 | } | |
906 | ||
907 | /* | |
8d0a8a9d TM |
908 | * Release reference to lock_state, and free it if we see that |
909 | * it is no longer in use | |
1da177e4 | 910 | */ |
faf5f49c | 911 | void nfs4_put_lock_state(struct nfs4_lock_state *lsp) |
1da177e4 | 912 | { |
c8b2d0bf | 913 | struct nfs_server *server; |
8d0a8a9d | 914 | struct nfs4_state *state; |
1da177e4 | 915 | |
8d0a8a9d TM |
916 | if (lsp == NULL) |
917 | return; | |
918 | state = lsp->ls_state; | |
194bc1f4 | 919 | if (!refcount_dec_and_lock(&lsp->ls_count, &state->state_lock)) |
8d0a8a9d TM |
920 | return; |
921 | list_del(&lsp->ls_locks); | |
922 | if (list_empty(&state->lock_states)) | |
923 | clear_bit(LK_STATE_IN_USE, &state->flags); | |
924 | spin_unlock(&state->state_lock); | |
0c0e0d3c JL |
925 | server = state->owner->so_server; |
926 | if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) { | |
927 | struct nfs_client *clp = server->nfs_client; | |
928 | ||
929 | clp->cl_mvops->free_lock_state(server, lsp); | |
930 | } else | |
c8b2d0bf | 931 | nfs4_free_lock_state(server, lsp); |
1da177e4 LT |
932 | } |
933 | ||
8d0a8a9d | 934 | static void nfs4_fl_copy_lock(struct file_lock *dst, struct file_lock *src) |
1da177e4 | 935 | { |
8d0a8a9d | 936 | struct nfs4_lock_state *lsp = src->fl_u.nfs4_fl.owner; |
1da177e4 | 937 | |
8d0a8a9d | 938 | dst->fl_u.nfs4_fl.owner = lsp; |
194bc1f4 | 939 | refcount_inc(&lsp->ls_count); |
8d0a8a9d | 940 | } |
1da177e4 | 941 | |
8d0a8a9d | 942 | static void nfs4_fl_release_lock(struct file_lock *fl) |
1da177e4 | 943 | { |
8d0a8a9d | 944 | nfs4_put_lock_state(fl->fl_u.nfs4_fl.owner); |
1da177e4 LT |
945 | } |
946 | ||
6aed6285 | 947 | static const struct file_lock_operations nfs4_fl_lock_ops = { |
8d0a8a9d TM |
948 | .fl_copy_lock = nfs4_fl_copy_lock, |
949 | .fl_release_private = nfs4_fl_release_lock, | |
950 | }; | |
951 | ||
952 | int nfs4_set_lock_state(struct nfs4_state *state, struct file_lock *fl) | |
1da177e4 | 953 | { |
8d0a8a9d TM |
954 | struct nfs4_lock_state *lsp; |
955 | ||
956 | if (fl->fl_ops != NULL) | |
957 | return 0; | |
8003d3c4 | 958 | lsp = nfs4_get_lock_state(state, fl->fl_owner); |
8d0a8a9d TM |
959 | if (lsp == NULL) |
960 | return -ENOMEM; | |
961 | fl->fl_u.nfs4_fl.owner = lsp; | |
962 | fl->fl_ops = &nfs4_fl_lock_ops; | |
963 | return 0; | |
1da177e4 LT |
964 | } |
965 | ||
5521abfd TM |
966 | static int nfs4_copy_lock_stateid(nfs4_stateid *dst, |
967 | struct nfs4_state *state, | |
17393475 | 968 | const struct nfs_lock_context *l_ctx) |
1da177e4 | 969 | { |
8d0a8a9d | 970 | struct nfs4_lock_state *lsp; |
8d424431 | 971 | fl_owner_t fl_owner, fl_flock_owner; |
5521abfd | 972 | int ret = -ENOENT; |
1da177e4 | 973 | |
17393475 | 974 | if (l_ctx == NULL) |
2a369153 TM |
975 | goto out; |
976 | ||
8d0a8a9d | 977 | if (test_bit(LK_STATE_IN_USE, &state->flags) == 0) |
4fc8796d | 978 | goto out; |
1da177e4 | 979 | |
d51fdb87 | 980 | fl_owner = l_ctx->lockowner; |
8d424431 N |
981 | fl_flock_owner = l_ctx->open_context->flock_owner; |
982 | ||
8d0a8a9d | 983 | spin_lock(&state->state_lock); |
8d424431 | 984 | lsp = __nfs4_find_lock_state(state, fl_owner, fl_flock_owner); |
ef1820f9 N |
985 | if (lsp && test_bit(NFS_LOCK_LOST, &lsp->ls_flags)) |
986 | ret = -EIO; | |
987 | else if (lsp != NULL && test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0) { | |
f597c537 | 988 | nfs4_stateid_copy(dst, &lsp->ls_stateid); |
5521abfd | 989 | ret = 0; |
4fc8796d | 990 | } |
8d0a8a9d | 991 | spin_unlock(&state->state_lock); |
1da177e4 | 992 | nfs4_put_lock_state(lsp); |
4fc8796d TM |
993 | out: |
994 | return ret; | |
995 | } | |
996 | ||
12f275cd TM |
997 | bool nfs4_refresh_open_stateid(nfs4_stateid *dst, struct nfs4_state *state) |
998 | { | |
999 | bool ret; | |
1000 | int seq; | |
1001 | ||
1002 | do { | |
1003 | ret = false; | |
1004 | seq = read_seqbegin(&state->seqlock); | |
1005 | if (nfs4_state_match_open_stateid_other(state, dst)) { | |
1006 | dst->seqid = state->open_stateid.seqid; | |
1007 | ret = true; | |
1008 | } | |
1009 | } while (read_seqretry(&state->seqlock, seq)); | |
1010 | return ret; | |
1011 | } | |
1012 | ||
c82bac6f | 1013 | bool nfs4_copy_open_stateid(nfs4_stateid *dst, struct nfs4_state *state) |
4fc8796d | 1014 | { |
c82bac6f | 1015 | bool ret; |
92b40e93 | 1016 | const nfs4_stateid *src; |
4fc8796d TM |
1017 | int seq; |
1018 | ||
1019 | do { | |
c82bac6f | 1020 | ret = false; |
92b40e93 | 1021 | src = &zero_stateid; |
4fc8796d | 1022 | seq = read_seqbegin(&state->seqlock); |
c82bac6f | 1023 | if (test_bit(NFS_OPEN_STATE, &state->flags)) { |
92b40e93 | 1024 | src = &state->open_stateid; |
c82bac6f TM |
1025 | ret = true; |
1026 | } | |
92b40e93 | 1027 | nfs4_stateid_copy(dst, src); |
4fc8796d | 1028 | } while (read_seqretry(&state->seqlock, seq)); |
c82bac6f | 1029 | return ret; |
4fc8796d TM |
1030 | } |
1031 | ||
1032 | /* | |
1033 | * Byte-range lock aware utility to initialize the stateid of read/write | |
1034 | * requests. | |
1035 | */ | |
abf4e13c | 1036 | int nfs4_select_rw_stateid(struct nfs4_state *state, |
17393475 | 1037 | fmode_t fmode, const struct nfs_lock_context *l_ctx, |
abf4e13c | 1038 | nfs4_stateid *dst, struct rpc_cred **cred) |
4fc8796d | 1039 | { |
abf4e13c TM |
1040 | int ret; |
1041 | ||
7ebeb7fe TM |
1042 | if (!nfs4_valid_open_stateid(state)) |
1043 | return -EIO; | |
abf4e13c TM |
1044 | if (cred != NULL) |
1045 | *cred = NULL; | |
17393475 | 1046 | ret = nfs4_copy_lock_stateid(dst, state, l_ctx); |
ef1820f9 N |
1047 | if (ret == -EIO) |
1048 | /* A lost lock - don't even consider delegations */ | |
1049 | goto out; | |
146d70ca | 1050 | /* returns true if delegation stateid found and copied */ |
abf4e13c | 1051 | if (nfs4_copy_delegation_stateid(state->inode, fmode, dst, cred)) { |
146d70ca | 1052 | ret = 0; |
5521abfd | 1053 | goto out; |
146d70ca | 1054 | } |
5521abfd | 1055 | if (ret != -ENOENT) |
ef1820f9 N |
1056 | /* nfs4_copy_delegation_stateid() didn't over-write |
1057 | * dst, so it still has the lock stateid which we now | |
1058 | * choose to use. | |
1059 | */ | |
5521abfd | 1060 | goto out; |
927864cd TM |
1061 | nfs4_copy_open_stateid(dst, state); |
1062 | ret = 0; | |
5521abfd | 1063 | out: |
3b66486c TM |
1064 | if (nfs_server_capable(state->inode, NFS_CAP_STATEID_NFSV41)) |
1065 | dst->seqid = 0; | |
5521abfd | 1066 | return ret; |
1da177e4 LT |
1067 | } |
1068 | ||
8535b2be | 1069 | struct nfs_seqid *nfs_alloc_seqid(struct nfs_seqid_counter *counter, gfp_t gfp_mask) |
cee54fc9 | 1070 | { |
cee54fc9 TM |
1071 | struct nfs_seqid *new; |
1072 | ||
8535b2be | 1073 | new = kmalloc(sizeof(*new), gfp_mask); |
badc76dd TM |
1074 | if (new == NULL) |
1075 | return ERR_PTR(-ENOMEM); | |
1076 | new->sequence = counter; | |
1077 | INIT_LIST_HEAD(&new->list); | |
1078 | new->task = NULL; | |
cee54fc9 TM |
1079 | return new; |
1080 | } | |
1081 | ||
72211dbe | 1082 | void nfs_release_seqid(struct nfs_seqid *seqid) |
1da177e4 | 1083 | { |
4601df20 | 1084 | struct nfs_seqid_counter *sequence; |
cee54fc9 | 1085 | |
a6796419 | 1086 | if (seqid == NULL || list_empty(&seqid->list)) |
4601df20 TM |
1087 | return; |
1088 | sequence = seqid->sequence; | |
1089 | spin_lock(&sequence->lock); | |
1090 | list_del_init(&seqid->list); | |
1091 | if (!list_empty(&sequence->list)) { | |
1092 | struct nfs_seqid *next; | |
1093 | ||
1094 | next = list_first_entry(&sequence->list, | |
1095 | struct nfs_seqid, list); | |
1096 | rpc_wake_up_queued_task(&sequence->wait, next->task); | |
2f74c0a0 | 1097 | } |
4601df20 | 1098 | spin_unlock(&sequence->lock); |
72211dbe TM |
1099 | } |
1100 | ||
1101 | void nfs_free_seqid(struct nfs_seqid *seqid) | |
1102 | { | |
1103 | nfs_release_seqid(seqid); | |
cee54fc9 | 1104 | kfree(seqid); |
1da177e4 LT |
1105 | } |
1106 | ||
1107 | /* | |
cee54fc9 TM |
1108 | * Increment the seqid if the OPEN/OPEN_DOWNGRADE/CLOSE succeeded, or |
1109 | * failed with a seqid incrementing error - | |
16a6ddc7 | 1110 | * see comments nfs4.h:seqid_mutating_error() |
cee54fc9 | 1111 | */ |
88d90939 | 1112 | static void nfs_increment_seqid(int status, struct nfs_seqid *seqid) |
cee54fc9 TM |
1113 | { |
1114 | switch (status) { | |
1115 | case 0: | |
1116 | break; | |
1117 | case -NFS4ERR_BAD_SEQID: | |
6f43ddcc TM |
1118 | if (seqid->sequence->flags & NFS_SEQID_CONFIRMED) |
1119 | return; | |
9a3ba432 | 1120 | pr_warn_ratelimited("NFS: v4 server returned a bad" |
497799e7 DM |
1121 | " sequence-id error on an" |
1122 | " unconfirmed sequence %p!\n", | |
6f43ddcc | 1123 | seqid->sequence); |
cee54fc9 TM |
1124 | case -NFS4ERR_STALE_CLIENTID: |
1125 | case -NFS4ERR_STALE_STATEID: | |
1126 | case -NFS4ERR_BAD_STATEID: | |
1127 | case -NFS4ERR_BADXDR: | |
1128 | case -NFS4ERR_RESOURCE: | |
1129 | case -NFS4ERR_NOFILEHANDLE: | |
406dab84 | 1130 | case -NFS4ERR_MOVED: |
cee54fc9 TM |
1131 | /* Non-seqid mutating errors */ |
1132 | return; | |
1133 | }; | |
1134 | /* | |
1135 | * Note: no locking needed as we are guaranteed to be first | |
1136 | * on the sequence list | |
1137 | */ | |
1138 | seqid->sequence->counter++; | |
1139 | } | |
1140 | ||
1141 | void nfs_increment_open_seqid(int status, struct nfs_seqid *seqid) | |
1142 | { | |
a6796419 TM |
1143 | struct nfs4_state_owner *sp; |
1144 | ||
1145 | if (seqid == NULL) | |
1146 | return; | |
34dc1ad7 | 1147 | |
a6796419 | 1148 | sp = container_of(seqid->sequence, struct nfs4_state_owner, so_seqid); |
34dc1ad7 | 1149 | if (status == -NFS4ERR_BAD_SEQID) |
86cfb041 | 1150 | nfs4_reset_state_owner(sp); |
a6796419 | 1151 | if (!nfs4_has_session(sp->so_server->nfs_client)) |
34dc1ad7 | 1152 | nfs_increment_seqid(status, seqid); |
cee54fc9 TM |
1153 | } |
1154 | ||
1155 | /* | |
cee54fc9 TM |
1156 | * Increment the seqid if the LOCK/LOCKU succeeded, or |
1157 | * failed with a seqid incrementing error - | |
16a6ddc7 | 1158 | * see comments nfs4.h:seqid_mutating_error() |
cee54fc9 TM |
1159 | */ |
1160 | void nfs_increment_lock_seqid(int status, struct nfs_seqid *seqid) | |
1161 | { | |
a6796419 TM |
1162 | if (seqid != NULL) |
1163 | nfs_increment_seqid(status, seqid); | |
cee54fc9 TM |
1164 | } |
1165 | ||
1166 | int nfs_wait_on_sequence(struct nfs_seqid *seqid, struct rpc_task *task) | |
1167 | { | |
a6796419 | 1168 | struct nfs_seqid_counter *sequence; |
cee54fc9 TM |
1169 | int status = 0; |
1170 | ||
a6796419 TM |
1171 | if (seqid == NULL) |
1172 | goto out; | |
1173 | sequence = seqid->sequence; | |
cee54fc9 | 1174 | spin_lock(&sequence->lock); |
4601df20 | 1175 | seqid->task = task; |
2f74c0a0 TM |
1176 | if (list_empty(&seqid->list)) |
1177 | list_add_tail(&seqid->list, &sequence->list); | |
1178 | if (list_first_entry(&sequence->list, struct nfs_seqid, list) == seqid) | |
1179 | goto unlock; | |
5d00837b | 1180 | rpc_sleep_on(&sequence->wait, task, NULL); |
2f74c0a0 TM |
1181 | status = -EAGAIN; |
1182 | unlock: | |
cee54fc9 | 1183 | spin_unlock(&sequence->lock); |
a6796419 | 1184 | out: |
cee54fc9 | 1185 | return status; |
1da177e4 LT |
1186 | } |
1187 | ||
e005e804 | 1188 | static int nfs4_run_state_manager(void *); |
1da177e4 | 1189 | |
e005e804 | 1190 | static void nfs4_clear_state_manager_bit(struct nfs_client *clp) |
433fbe4c | 1191 | { |
4e857c58 | 1192 | smp_mb__before_atomic(); |
e005e804 | 1193 | clear_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state); |
4e857c58 | 1194 | smp_mb__after_atomic(); |
e005e804 | 1195 | wake_up_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING); |
433fbe4c TM |
1196 | rpc_wake_up(&clp->cl_rpcwaitq); |
1197 | } | |
1198 | ||
1da177e4 | 1199 | /* |
e005e804 | 1200 | * Schedule the nfs_client asynchronous state management routine |
1da177e4 | 1201 | */ |
b0d3ded1 | 1202 | void nfs4_schedule_state_manager(struct nfs_client *clp) |
1da177e4 | 1203 | { |
5043e900 | 1204 | struct task_struct *task; |
2446ab60 | 1205 | char buf[INET6_ADDRSTRLEN + sizeof("-manager") + 1]; |
1da177e4 | 1206 | |
e005e804 TM |
1207 | if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) != 0) |
1208 | return; | |
5043e900 | 1209 | __module_get(THIS_MODULE); |
212bf41d | 1210 | refcount_inc(&clp->cl_count); |
2446ab60 TM |
1211 | |
1212 | /* The rcu_read_lock() is not strictly necessary, as the state | |
1213 | * manager is the only thread that ever changes the rpc_xprt | |
1214 | * after it's initialized. At this point, we're single threaded. */ | |
1215 | rcu_read_lock(); | |
1216 | snprintf(buf, sizeof(buf), "%s-manager", | |
1217 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)); | |
1218 | rcu_read_unlock(); | |
f170168b | 1219 | task = kthread_run(nfs4_run_state_manager, clp, "%s", buf); |
2446ab60 TM |
1220 | if (IS_ERR(task)) { |
1221 | printk(KERN_ERR "%s: kthread_run: %ld\n", | |
1222 | __func__, PTR_ERR(task)); | |
1223 | nfs4_clear_state_manager_bit(clp); | |
1224 | nfs_put_client(clp); | |
1225 | module_put(THIS_MODULE); | |
1226 | } | |
1da177e4 LT |
1227 | } |
1228 | ||
1229 | /* | |
0400a6b0 | 1230 | * Schedule a lease recovery attempt |
1da177e4 | 1231 | */ |
0400a6b0 | 1232 | void nfs4_schedule_lease_recovery(struct nfs_client *clp) |
1da177e4 LT |
1233 | { |
1234 | if (!clp) | |
1235 | return; | |
e598d843 TM |
1236 | if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
1237 | set_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); | |
cc0a9843 TM |
1238 | dprintk("%s: scheduling lease recovery for server %s\n", __func__, |
1239 | clp->cl_hostname); | |
e005e804 | 1240 | nfs4_schedule_state_manager(clp); |
1da177e4 | 1241 | } |
9cb81968 | 1242 | EXPORT_SYMBOL_GPL(nfs4_schedule_lease_recovery); |
1da177e4 | 1243 | |
c9fdeb28 CL |
1244 | /** |
1245 | * nfs4_schedule_migration_recovery - trigger migration recovery | |
1246 | * | |
1247 | * @server: FSID that is migrating | |
1248 | * | |
1249 | * Returns zero if recovery has started, otherwise a negative NFS4ERR | |
1250 | * value is returned. | |
1251 | */ | |
1252 | int nfs4_schedule_migration_recovery(const struct nfs_server *server) | |
1253 | { | |
1254 | struct nfs_client *clp = server->nfs_client; | |
1255 | ||
1256 | if (server->fh_expire_type != NFS4_FH_PERSISTENT) { | |
1257 | pr_err("NFS: volatile file handles not supported (server %s)\n", | |
1258 | clp->cl_hostname); | |
1259 | return -NFS4ERR_IO; | |
1260 | } | |
1261 | ||
1262 | if (test_bit(NFS_MIG_FAILED, &server->mig_status)) | |
1263 | return -NFS4ERR_IO; | |
1264 | ||
1265 | dprintk("%s: scheduling migration recovery for (%llx:%llx) on %s\n", | |
1266 | __func__, | |
1267 | (unsigned long long)server->fsid.major, | |
1268 | (unsigned long long)server->fsid.minor, | |
1269 | clp->cl_hostname); | |
1270 | ||
1271 | set_bit(NFS_MIG_IN_TRANSITION, | |
1272 | &((struct nfs_server *)server)->mig_status); | |
1273 | set_bit(NFS4CLNT_MOVED, &clp->cl_state); | |
1274 | ||
1275 | nfs4_schedule_state_manager(clp); | |
1276 | return 0; | |
1277 | } | |
1278 | EXPORT_SYMBOL_GPL(nfs4_schedule_migration_recovery); | |
1279 | ||
b7f7a66e CL |
1280 | /** |
1281 | * nfs4_schedule_lease_moved_recovery - start lease-moved recovery | |
1282 | * | |
1283 | * @clp: server to check for moved leases | |
1284 | * | |
1285 | */ | |
1286 | void nfs4_schedule_lease_moved_recovery(struct nfs_client *clp) | |
1287 | { | |
1288 | dprintk("%s: scheduling lease-moved recovery for client ID %llx on %s\n", | |
1289 | __func__, clp->cl_clientid, clp->cl_hostname); | |
1290 | ||
1291 | set_bit(NFS4CLNT_LEASE_MOVED, &clp->cl_state); | |
1292 | nfs4_schedule_state_manager(clp); | |
1293 | } | |
1294 | EXPORT_SYMBOL_GPL(nfs4_schedule_lease_moved_recovery); | |
1295 | ||
33021279 TM |
1296 | int nfs4_wait_clnt_recover(struct nfs_client *clp) |
1297 | { | |
1298 | int res; | |
1299 | ||
1300 | might_sleep(); | |
1301 | ||
212bf41d | 1302 | refcount_inc(&clp->cl_count); |
74316201 N |
1303 | res = wait_on_bit_action(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING, |
1304 | nfs_wait_bit_killable, TASK_KILLABLE); | |
33021279 | 1305 | if (res) |
0625c2dd | 1306 | goto out; |
33021279 | 1307 | if (clp->cl_cons_state < 0) |
0625c2dd CL |
1308 | res = clp->cl_cons_state; |
1309 | out: | |
1310 | nfs_put_client(clp); | |
1311 | return res; | |
33021279 TM |
1312 | } |
1313 | ||
1314 | int nfs4_client_recover_expired_lease(struct nfs_client *clp) | |
1315 | { | |
1316 | unsigned int loop; | |
1317 | int ret; | |
1318 | ||
1319 | for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) { | |
1320 | ret = nfs4_wait_clnt_recover(clp); | |
1321 | if (ret != 0) | |
1322 | break; | |
1323 | if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) && | |
1324 | !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state)) | |
1325 | break; | |
1326 | nfs4_schedule_state_manager(clp); | |
1327 | ret = -EIO; | |
1328 | } | |
1329 | return ret; | |
1330 | } | |
1331 | ||
ad1e3968 TM |
1332 | /* |
1333 | * nfs40_handle_cb_pathdown - return all delegations after NFS4ERR_CB_PATH_DOWN | |
1334 | * @clp: client to process | |
1335 | * | |
1336 | * Set the NFS4CLNT_LEASE_EXPIRED state in order to force a | |
1337 | * resend of the SETCLIENTID and hence re-establish the | |
1338 | * callback channel. Then return all existing delegations. | |
1339 | */ | |
1340 | static void nfs40_handle_cb_pathdown(struct nfs_client *clp) | |
1341 | { | |
1342 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1343 | nfs_expire_all_delegations(clp); | |
cc0a9843 TM |
1344 | dprintk("%s: handling CB_PATHDOWN recovery for server %s\n", __func__, |
1345 | clp->cl_hostname); | |
ad1e3968 TM |
1346 | } |
1347 | ||
042b60be TM |
1348 | void nfs4_schedule_path_down_recovery(struct nfs_client *clp) |
1349 | { | |
ad1e3968 | 1350 | nfs40_handle_cb_pathdown(clp); |
042b60be TM |
1351 | nfs4_schedule_state_manager(clp); |
1352 | } | |
1353 | ||
f9feab1e | 1354 | static int nfs4_state_mark_reclaim_reboot(struct nfs_client *clp, struct nfs4_state *state) |
b79a4a1b TM |
1355 | { |
1356 | ||
7ebeb7fe TM |
1357 | if (!nfs4_valid_open_stateid(state)) |
1358 | return 0; | |
b79a4a1b TM |
1359 | set_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); |
1360 | /* Don't recover state that expired before the reboot */ | |
1361 | if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) { | |
1362 | clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); | |
1363 | return 0; | |
1364 | } | |
7eff03ae | 1365 | set_bit(NFS_OWNER_RECLAIM_REBOOT, &state->owner->so_flags); |
b79a4a1b TM |
1366 | set_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state); |
1367 | return 1; | |
1368 | } | |
1369 | ||
4f14c194 | 1370 | int nfs4_state_mark_reclaim_nograce(struct nfs_client *clp, struct nfs4_state *state) |
b79a4a1b | 1371 | { |
7ebeb7fe TM |
1372 | if (!nfs4_valid_open_stateid(state)) |
1373 | return 0; | |
b79a4a1b TM |
1374 | set_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags); |
1375 | clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); | |
7eff03ae | 1376 | set_bit(NFS_OWNER_RECLAIM_NOGRACE, &state->owner->so_flags); |
b79a4a1b TM |
1377 | set_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state); |
1378 | return 1; | |
1379 | } | |
1380 | ||
5d422301 | 1381 | int nfs4_schedule_stateid_recovery(const struct nfs_server *server, struct nfs4_state *state) |
0400a6b0 TM |
1382 | { |
1383 | struct nfs_client *clp = server->nfs_client; | |
1384 | ||
7ebeb7fe | 1385 | if (!nfs4_state_mark_reclaim_nograce(clp, state)) |
5d422301 | 1386 | return -EBADF; |
cc0a9843 TM |
1387 | dprintk("%s: scheduling stateid recovery for server %s\n", __func__, |
1388 | clp->cl_hostname); | |
0400a6b0 | 1389 | nfs4_schedule_state_manager(clp); |
5d422301 | 1390 | return 0; |
0400a6b0 | 1391 | } |
9cb81968 | 1392 | EXPORT_SYMBOL_GPL(nfs4_schedule_stateid_recovery); |
0400a6b0 | 1393 | |
6c2d8f8d TM |
1394 | static struct nfs4_lock_state * |
1395 | nfs_state_find_lock_state_by_stateid(struct nfs4_state *state, | |
1396 | const nfs4_stateid *stateid) | |
1397 | { | |
1398 | struct nfs4_lock_state *pos; | |
1399 | ||
1400 | list_for_each_entry(pos, &state->lock_states, ls_locks) { | |
1401 | if (!test_bit(NFS_LOCK_INITIALIZED, &pos->ls_flags)) | |
1402 | continue; | |
1403 | if (nfs4_stateid_match_other(&pos->ls_stateid, stateid)) | |
1404 | return pos; | |
1405 | } | |
1406 | return NULL; | |
1407 | } | |
1408 | ||
1409 | static bool nfs_state_lock_state_matches_stateid(struct nfs4_state *state, | |
1410 | const nfs4_stateid *stateid) | |
1411 | { | |
1412 | bool found = false; | |
1413 | ||
1414 | if (test_bit(LK_STATE_IN_USE, &state->flags)) { | |
1415 | spin_lock(&state->state_lock); | |
1416 | if (nfs_state_find_lock_state_by_stateid(state, stateid)) | |
1417 | found = true; | |
1418 | spin_unlock(&state->state_lock); | |
1419 | } | |
1420 | return found; | |
1421 | } | |
1422 | ||
a1d0b5ee TM |
1423 | void nfs_inode_find_state_and_recover(struct inode *inode, |
1424 | const nfs4_stateid *stateid) | |
1425 | { | |
1426 | struct nfs_client *clp = NFS_SERVER(inode)->nfs_client; | |
1427 | struct nfs_inode *nfsi = NFS_I(inode); | |
1428 | struct nfs_open_context *ctx; | |
1429 | struct nfs4_state *state; | |
1430 | bool found = false; | |
1431 | ||
1432 | spin_lock(&inode->i_lock); | |
1433 | list_for_each_entry(ctx, &nfsi->open_files, list) { | |
1434 | state = ctx->state; | |
1435 | if (state == NULL) | |
1436 | continue; | |
7ebeb7fe TM |
1437 | if (nfs4_stateid_match_other(&state->stateid, stateid) && |
1438 | nfs4_state_mark_reclaim_nograce(clp, state)) { | |
6c2d8f8d | 1439 | found = true; |
a1d0b5ee | 1440 | continue; |
6c2d8f8d | 1441 | } |
46280d9d TM |
1442 | if (nfs4_stateid_match_other(&state->open_stateid, stateid) && |
1443 | nfs4_state_mark_reclaim_nograce(clp, state)) { | |
1444 | found = true; | |
1445 | continue; | |
1446 | } | |
7ebeb7fe TM |
1447 | if (nfs_state_lock_state_matches_stateid(state, stateid) && |
1448 | nfs4_state_mark_reclaim_nograce(clp, state)) | |
6c2d8f8d | 1449 | found = true; |
a1d0b5ee TM |
1450 | } |
1451 | spin_unlock(&inode->i_lock); | |
6c2d8f8d TM |
1452 | |
1453 | nfs_inode_find_delegation_state_and_recover(inode, stateid); | |
a1d0b5ee TM |
1454 | if (found) |
1455 | nfs4_schedule_state_manager(clp); | |
1456 | } | |
1457 | ||
c58c8441 TM |
1458 | static void nfs4_state_mark_open_context_bad(struct nfs4_state *state) |
1459 | { | |
1460 | struct inode *inode = state->inode; | |
1461 | struct nfs_inode *nfsi = NFS_I(inode); | |
1462 | struct nfs_open_context *ctx; | |
1463 | ||
1464 | spin_lock(&inode->i_lock); | |
1465 | list_for_each_entry(ctx, &nfsi->open_files, list) { | |
1466 | if (ctx->state != state) | |
1467 | continue; | |
1468 | set_bit(NFS_CONTEXT_BAD, &ctx->flags); | |
1469 | } | |
1470 | spin_unlock(&inode->i_lock); | |
1471 | } | |
1472 | ||
5d422301 TM |
1473 | static void nfs4_state_mark_recovery_failed(struct nfs4_state *state, int error) |
1474 | { | |
1475 | set_bit(NFS_STATE_RECOVERY_FAILED, &state->flags); | |
c58c8441 | 1476 | nfs4_state_mark_open_context_bad(state); |
5d422301 TM |
1477 | } |
1478 | ||
a1d0b5ee | 1479 | |
02860014 | 1480 | static int nfs4_reclaim_locks(struct nfs4_state *state, const struct nfs4_state_recovery_ops *ops) |
1da177e4 LT |
1481 | { |
1482 | struct inode *inode = state->inode; | |
19e03c57 | 1483 | struct nfs_inode *nfsi = NFS_I(inode); |
1da177e4 | 1484 | struct file_lock *fl; |
eb9c38bf | 1485 | struct nfs4_lock_state *lsp; |
1da177e4 | 1486 | int status = 0; |
5263e31e | 1487 | struct file_lock_context *flctx = inode->i_flctx; |
bd61e0a9 | 1488 | struct list_head *list; |
1da177e4 | 1489 | |
bd61e0a9 | 1490 | if (flctx == NULL) |
3f09df70 TM |
1491 | return 0; |
1492 | ||
bd61e0a9 JL |
1493 | list = &flctx->flc_posix; |
1494 | ||
3f09df70 | 1495 | /* Guard against delegation returns and new lock/unlock calls */ |
19e03c57 | 1496 | down_write(&nfsi->rwsem); |
6109c850 | 1497 | spin_lock(&flctx->flc_lock); |
bd61e0a9 JL |
1498 | restart: |
1499 | list_for_each_entry(fl, list, fl_list) { | |
5263e31e JL |
1500 | if (nfs_file_open_context(fl->fl_file)->state != state) |
1501 | continue; | |
6109c850 | 1502 | spin_unlock(&flctx->flc_lock); |
5263e31e JL |
1503 | status = ops->recover_lock(state, fl); |
1504 | switch (status) { | |
1505 | case 0: | |
1506 | break; | |
1507 | case -ESTALE: | |
1508 | case -NFS4ERR_ADMIN_REVOKED: | |
1509 | case -NFS4ERR_STALE_STATEID: | |
1510 | case -NFS4ERR_BAD_STATEID: | |
1511 | case -NFS4ERR_EXPIRED: | |
1512 | case -NFS4ERR_NO_GRACE: | |
1513 | case -NFS4ERR_STALE_CLIENTID: | |
1514 | case -NFS4ERR_BADSESSION: | |
1515 | case -NFS4ERR_BADSLOT: | |
1516 | case -NFS4ERR_BAD_HIGH_SLOT: | |
1517 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
1518 | goto out; | |
1519 | default: | |
1520 | pr_err("NFS: %s: unhandled error %d\n", | |
1521 | __func__, status); | |
1522 | case -ENOMEM: | |
1523 | case -NFS4ERR_DENIED: | |
1524 | case -NFS4ERR_RECLAIM_BAD: | |
1525 | case -NFS4ERR_RECLAIM_CONFLICT: | |
eb9c38bf N |
1526 | lsp = fl->fl_u.nfs4_fl.owner; |
1527 | if (lsp) | |
1528 | set_bit(NFS_LOCK_LOST, &lsp->ls_flags); | |
5263e31e JL |
1529 | status = 0; |
1530 | } | |
6109c850 | 1531 | spin_lock(&flctx->flc_lock); |
5263e31e | 1532 | } |
bd61e0a9 JL |
1533 | if (list == &flctx->flc_posix) { |
1534 | list = &flctx->flc_flock; | |
1535 | goto restart; | |
1536 | } | |
6109c850 | 1537 | spin_unlock(&flctx->flc_lock); |
965b5d67 | 1538 | out: |
19e03c57 | 1539 | up_write(&nfsi->rwsem); |
1da177e4 LT |
1540 | return status; |
1541 | } | |
1542 | ||
02860014 | 1543 | static int nfs4_reclaim_open_state(struct nfs4_state_owner *sp, const struct nfs4_state_recovery_ops *ops) |
1da177e4 LT |
1544 | { |
1545 | struct nfs4_state *state; | |
1546 | struct nfs4_lock_state *lock; | |
1547 | int status = 0; | |
1548 | ||
1549 | /* Note: we rely on the sp->so_states list being ordered | |
1550 | * so that we always reclaim open(O_RDWR) and/or open(O_WRITE) | |
1551 | * states first. | |
1552 | * This is needed to ensure that the server won't give us any | |
1553 | * read delegations that we have to return if, say, we are | |
1554 | * recovering after a network partition or a reboot from a | |
1555 | * server that doesn't support a grace period. | |
1556 | */ | |
fe1d8195 | 1557 | spin_lock(&sp->so_lock); |
abbec2da | 1558 | raw_write_seqcount_begin(&sp->so_reclaim_seqcount); |
c137afab | 1559 | restart: |
1da177e4 | 1560 | list_for_each_entry(state, &sp->so_states, open_states) { |
b79a4a1b TM |
1561 | if (!test_and_clear_bit(ops->state_flag_bit, &state->flags)) |
1562 | continue; | |
5d422301 TM |
1563 | if (!nfs4_valid_open_stateid(state)) |
1564 | continue; | |
1da177e4 LT |
1565 | if (state->state == 0) |
1566 | continue; | |
fe1d8195 TM |
1567 | atomic_inc(&state->count); |
1568 | spin_unlock(&sp->so_lock); | |
1da177e4 | 1569 | status = ops->recover_open(sp, state); |
1da177e4 | 1570 | if (status >= 0) { |
02860014 TM |
1571 | status = nfs4_reclaim_locks(state, ops); |
1572 | if (status >= 0) { | |
1acd1c30 | 1573 | if (!test_bit(NFS_DELEGATED_STATE, &state->flags)) { |
6686390b N |
1574 | spin_lock(&state->state_lock); |
1575 | list_for_each_entry(lock, &state->lock_states, ls_locks) { | |
1576 | if (!test_bit(NFS_LOCK_INITIALIZED, &lock->ls_flags)) | |
1577 | pr_warn_ratelimited("NFS: " | |
1578 | "%s: Lock reclaim " | |
1579 | "failed!\n", __func__); | |
1580 | } | |
1581 | spin_unlock(&state->state_lock); | |
02860014 | 1582 | } |
a41cbe86 | 1583 | clear_bit(NFS_STATE_RECLAIM_NOGRACE, |
e8d975e7 | 1584 | &state->flags); |
cea7f829 | 1585 | nfs4_put_open_state(state); |
c137afab | 1586 | spin_lock(&sp->so_lock); |
fe1d8195 | 1587 | goto restart; |
1da177e4 | 1588 | } |
1da177e4 LT |
1589 | } |
1590 | switch (status) { | |
1591 | default: | |
3660cd43 AA |
1592 | printk(KERN_ERR "NFS: %s: unhandled error %d\n", |
1593 | __func__, status); | |
1da177e4 | 1594 | case -ENOENT: |
965b5d67 | 1595 | case -ENOMEM: |
304020fe TM |
1596 | case -EACCES: |
1597 | case -EROFS: | |
1598 | case -EIO: | |
b79a4a1b | 1599 | case -ESTALE: |
3660cd43 | 1600 | /* Open state on this file cannot be recovered */ |
5d422301 | 1601 | nfs4_state_mark_recovery_failed(state, status); |
1da177e4 | 1602 | break; |
91876b13 TM |
1603 | case -EAGAIN: |
1604 | ssleep(1); | |
965b5d67 TM |
1605 | case -NFS4ERR_ADMIN_REVOKED: |
1606 | case -NFS4ERR_STALE_STATEID: | |
d41cbfc9 | 1607 | case -NFS4ERR_OLD_STATEID: |
965b5d67 | 1608 | case -NFS4ERR_BAD_STATEID: |
b79a4a1b TM |
1609 | case -NFS4ERR_RECLAIM_BAD: |
1610 | case -NFS4ERR_RECLAIM_CONFLICT: | |
1f0e890d | 1611 | nfs4_state_mark_reclaim_nograce(sp->so_server->nfs_client, state); |
b79a4a1b | 1612 | break; |
1da177e4 LT |
1613 | case -NFS4ERR_EXPIRED: |
1614 | case -NFS4ERR_NO_GRACE: | |
1f0e890d | 1615 | nfs4_state_mark_reclaim_nograce(sp->so_server->nfs_client, state); |
1da177e4 | 1616 | case -NFS4ERR_STALE_CLIENTID: |
9c4c761a TM |
1617 | case -NFS4ERR_BADSESSION: |
1618 | case -NFS4ERR_BADSLOT: | |
1619 | case -NFS4ERR_BAD_HIGH_SLOT: | |
1620 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
1da177e4 LT |
1621 | goto out_err; |
1622 | } | |
fe1d8195 | 1623 | nfs4_put_open_state(state); |
c137afab | 1624 | spin_lock(&sp->so_lock); |
fe1d8195 | 1625 | goto restart; |
1da177e4 | 1626 | } |
abbec2da | 1627 | raw_write_seqcount_end(&sp->so_reclaim_seqcount); |
fe1d8195 | 1628 | spin_unlock(&sp->so_lock); |
1da177e4 LT |
1629 | return 0; |
1630 | out_err: | |
fe1d8195 | 1631 | nfs4_put_open_state(state); |
c137afab | 1632 | spin_lock(&sp->so_lock); |
abbec2da | 1633 | raw_write_seqcount_end(&sp->so_reclaim_seqcount); |
c137afab | 1634 | spin_unlock(&sp->so_lock); |
1da177e4 LT |
1635 | return status; |
1636 | } | |
1637 | ||
b79a4a1b TM |
1638 | static void nfs4_clear_open_state(struct nfs4_state *state) |
1639 | { | |
1640 | struct nfs4_lock_state *lock; | |
1641 | ||
1642 | clear_bit(NFS_DELEGATED_STATE, &state->flags); | |
1643 | clear_bit(NFS_O_RDONLY_STATE, &state->flags); | |
1644 | clear_bit(NFS_O_WRONLY_STATE, &state->flags); | |
1645 | clear_bit(NFS_O_RDWR_STATE, &state->flags); | |
4b44b40e | 1646 | spin_lock(&state->state_lock); |
b79a4a1b | 1647 | list_for_each_entry(lock, &state->lock_states, ls_locks) { |
b79a4a1b | 1648 | lock->ls_seqid.flags = 0; |
795a88c9 | 1649 | clear_bit(NFS_LOCK_INITIALIZED, &lock->ls_flags); |
b79a4a1b | 1650 | } |
4b44b40e | 1651 | spin_unlock(&state->state_lock); |
b79a4a1b TM |
1652 | } |
1653 | ||
24d292b8 CL |
1654 | static void nfs4_reset_seqids(struct nfs_server *server, |
1655 | int (*mark_reclaim)(struct nfs_client *clp, struct nfs4_state *state)) | |
cee54fc9 | 1656 | { |
24d292b8 | 1657 | struct nfs_client *clp = server->nfs_client; |
cee54fc9 | 1658 | struct nfs4_state_owner *sp; |
9f958ab8 | 1659 | struct rb_node *pos; |
cee54fc9 | 1660 | struct nfs4_state *state; |
cee54fc9 | 1661 | |
24d292b8 CL |
1662 | spin_lock(&clp->cl_lock); |
1663 | for (pos = rb_first(&server->state_owners); | |
1664 | pos != NULL; | |
1665 | pos = rb_next(pos)) { | |
1666 | sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); | |
cee54fc9 | 1667 | sp->so_seqid.flags = 0; |
ec073428 | 1668 | spin_lock(&sp->so_lock); |
cee54fc9 | 1669 | list_for_each_entry(state, &sp->so_states, open_states) { |
b79a4a1b TM |
1670 | if (mark_reclaim(clp, state)) |
1671 | nfs4_clear_open_state(state); | |
cee54fc9 | 1672 | } |
ec073428 | 1673 | spin_unlock(&sp->so_lock); |
cee54fc9 | 1674 | } |
24d292b8 CL |
1675 | spin_unlock(&clp->cl_lock); |
1676 | } | |
1677 | ||
1678 | static void nfs4_state_mark_reclaim_helper(struct nfs_client *clp, | |
1679 | int (*mark_reclaim)(struct nfs_client *clp, struct nfs4_state *state)) | |
1680 | { | |
1681 | struct nfs_server *server; | |
1682 | ||
1683 | rcu_read_lock(); | |
1684 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) | |
1685 | nfs4_reset_seqids(server, mark_reclaim); | |
1686 | rcu_read_unlock(); | |
cee54fc9 TM |
1687 | } |
1688 | ||
b79a4a1b TM |
1689 | static void nfs4_state_start_reclaim_reboot(struct nfs_client *clp) |
1690 | { | |
1691 | /* Mark all delegations for reclaim */ | |
1692 | nfs_delegation_mark_reclaim(clp); | |
1693 | nfs4_state_mark_reclaim_helper(clp, nfs4_state_mark_reclaim_reboot); | |
1694 | } | |
1695 | ||
0048fdd0 | 1696 | static int nfs4_reclaim_complete(struct nfs_client *clp, |
965e9c23 TM |
1697 | const struct nfs4_state_recovery_ops *ops, |
1698 | struct rpc_cred *cred) | |
fce5c838 RL |
1699 | { |
1700 | /* Notify the server we're done reclaiming our state */ | |
1701 | if (ops->reclaim_complete) | |
0048fdd0 TM |
1702 | return ops->reclaim_complete(clp, cred); |
1703 | return 0; | |
fce5c838 RL |
1704 | } |
1705 | ||
24d292b8 | 1706 | static void nfs4_clear_reclaim_server(struct nfs_server *server) |
b79a4a1b | 1707 | { |
24d292b8 | 1708 | struct nfs_client *clp = server->nfs_client; |
b79a4a1b TM |
1709 | struct nfs4_state_owner *sp; |
1710 | struct rb_node *pos; | |
1711 | struct nfs4_state *state; | |
1712 | ||
24d292b8 CL |
1713 | spin_lock(&clp->cl_lock); |
1714 | for (pos = rb_first(&server->state_owners); | |
1715 | pos != NULL; | |
1716 | pos = rb_next(pos)) { | |
1717 | sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); | |
b79a4a1b TM |
1718 | spin_lock(&sp->so_lock); |
1719 | list_for_each_entry(state, &sp->so_states, open_states) { | |
24d292b8 CL |
1720 | if (!test_and_clear_bit(NFS_STATE_RECLAIM_REBOOT, |
1721 | &state->flags)) | |
b79a4a1b TM |
1722 | continue; |
1723 | nfs4_state_mark_reclaim_nograce(clp, state); | |
1724 | } | |
1725 | spin_unlock(&sp->so_lock); | |
1726 | } | |
24d292b8 CL |
1727 | spin_unlock(&clp->cl_lock); |
1728 | } | |
1729 | ||
1730 | static int nfs4_state_clear_reclaim_reboot(struct nfs_client *clp) | |
1731 | { | |
1732 | struct nfs_server *server; | |
1733 | ||
1734 | if (!test_and_clear_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) | |
1735 | return 0; | |
1736 | ||
1737 | rcu_read_lock(); | |
1738 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) | |
1739 | nfs4_clear_reclaim_server(server); | |
1740 | rcu_read_unlock(); | |
b79a4a1b TM |
1741 | |
1742 | nfs_delegation_reap_unclaimed(clp); | |
6eaa6149 TM |
1743 | return 1; |
1744 | } | |
1745 | ||
1746 | static void nfs4_state_end_reclaim_reboot(struct nfs_client *clp) | |
1747 | { | |
965e9c23 TM |
1748 | const struct nfs4_state_recovery_ops *ops; |
1749 | struct rpc_cred *cred; | |
0048fdd0 | 1750 | int err; |
965e9c23 | 1751 | |
6eaa6149 TM |
1752 | if (!nfs4_state_clear_reclaim_reboot(clp)) |
1753 | return; | |
965e9c23 | 1754 | ops = clp->cl_mvops->reboot_recovery_ops; |
73d8bde5 | 1755 | cred = nfs4_get_clid_cred(clp); |
0048fdd0 | 1756 | err = nfs4_reclaim_complete(clp, ops, cred); |
965e9c23 | 1757 | put_rpccred(cred); |
0048fdd0 TM |
1758 | if (err == -NFS4ERR_CONN_NOT_BOUND_TO_SESSION) |
1759 | set_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state); | |
b79a4a1b TM |
1760 | } |
1761 | ||
b79a4a1b TM |
1762 | static void nfs4_state_start_reclaim_nograce(struct nfs_client *clp) |
1763 | { | |
45870d69 | 1764 | nfs_mark_test_expired_all_delegations(clp); |
b79a4a1b TM |
1765 | nfs4_state_mark_reclaim_helper(clp, nfs4_state_mark_reclaim_nograce); |
1766 | } | |
1767 | ||
4f7cdf18 | 1768 | static int nfs4_recovery_handle_error(struct nfs_client *clp, int error) |
e598d843 TM |
1769 | { |
1770 | switch (error) { | |
4f38e4aa TM |
1771 | case 0: |
1772 | break; | |
e598d843 | 1773 | case -NFS4ERR_CB_PATH_DOWN: |
ad1e3968 | 1774 | nfs40_handle_cb_pathdown(clp); |
4f38e4aa | 1775 | break; |
c8b7ae3d TM |
1776 | case -NFS4ERR_NO_GRACE: |
1777 | nfs4_state_end_reclaim_reboot(clp); | |
4f38e4aa | 1778 | break; |
e598d843 | 1779 | case -NFS4ERR_STALE_CLIENTID: |
e598d843 TM |
1780 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); |
1781 | nfs4_state_start_reclaim_reboot(clp); | |
1782 | break; | |
1783 | case -NFS4ERR_EXPIRED: | |
1784 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1785 | nfs4_state_start_reclaim_nograce(clp); | |
8ba9bf8e | 1786 | break; |
c3fad1b1 AA |
1787 | case -NFS4ERR_BADSESSION: |
1788 | case -NFS4ERR_BADSLOT: | |
1789 | case -NFS4ERR_BAD_HIGH_SLOT: | |
1790 | case -NFS4ERR_DEADSESSION: | |
c3fad1b1 AA |
1791 | case -NFS4ERR_SEQ_FALSE_RETRY: |
1792 | case -NFS4ERR_SEQ_MISORDERED: | |
6df08189 | 1793 | set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); |
0b9e2d41 | 1794 | /* Zero session reset errors */ |
4f38e4aa | 1795 | break; |
7c5d7256 TM |
1796 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: |
1797 | set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); | |
1798 | break; | |
4f38e4aa | 1799 | default: |
cc0a9843 TM |
1800 | dprintk("%s: failed to handle error %d for server %s\n", |
1801 | __func__, error, clp->cl_hostname); | |
4f38e4aa | 1802 | return error; |
e598d843 | 1803 | } |
cc0a9843 TM |
1804 | dprintk("%s: handled error %d for server %s\n", __func__, error, |
1805 | clp->cl_hostname); | |
4f38e4aa | 1806 | return 0; |
e598d843 TM |
1807 | } |
1808 | ||
02860014 | 1809 | static int nfs4_do_reclaim(struct nfs_client *clp, const struct nfs4_state_recovery_ops *ops) |
1da177e4 | 1810 | { |
24d292b8 CL |
1811 | struct nfs4_state_owner *sp; |
1812 | struct nfs_server *server; | |
9f958ab8 | 1813 | struct rb_node *pos; |
1da177e4 LT |
1814 | int status = 0; |
1815 | ||
7eff03ae | 1816 | restart: |
24d292b8 CL |
1817 | rcu_read_lock(); |
1818 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { | |
0aaaf5c4 | 1819 | nfs4_purge_state_owners(server); |
24d292b8 CL |
1820 | spin_lock(&clp->cl_lock); |
1821 | for (pos = rb_first(&server->state_owners); | |
1822 | pos != NULL; | |
1823 | pos = rb_next(pos)) { | |
1824 | sp = rb_entry(pos, | |
1825 | struct nfs4_state_owner, so_server_node); | |
1826 | if (!test_and_clear_bit(ops->owner_flag_bit, | |
1827 | &sp->so_flags)) | |
1828 | continue; | |
4a0954ef TM |
1829 | if (!atomic_inc_not_zero(&sp->so_count)) |
1830 | continue; | |
24d292b8 CL |
1831 | spin_unlock(&clp->cl_lock); |
1832 | rcu_read_unlock(); | |
1833 | ||
1834 | status = nfs4_reclaim_open_state(sp, ops); | |
1835 | if (status < 0) { | |
1836 | set_bit(ops->owner_flag_bit, &sp->so_flags); | |
1837 | nfs4_put_state_owner(sp); | |
df817ba3 TM |
1838 | status = nfs4_recovery_handle_error(clp, status); |
1839 | return (status != 0) ? status : -EAGAIN; | |
24d292b8 CL |
1840 | } |
1841 | ||
7eff03ae | 1842 | nfs4_put_state_owner(sp); |
24d292b8 | 1843 | goto restart; |
7eff03ae | 1844 | } |
24d292b8 | 1845 | spin_unlock(&clp->cl_lock); |
02860014 | 1846 | } |
24d292b8 | 1847 | rcu_read_unlock(); |
df817ba3 | 1848 | return 0; |
02860014 TM |
1849 | } |
1850 | ||
1851 | static int nfs4_check_lease(struct nfs_client *clp) | |
1852 | { | |
1853 | struct rpc_cred *cred; | |
c48f4f35 TM |
1854 | const struct nfs4_state_maintenance_ops *ops = |
1855 | clp->cl_mvops->state_renewal_ops; | |
4f38e4aa | 1856 | int status; |
1da177e4 | 1857 | |
0f605b56 TM |
1858 | /* Is the client already known to have an expired lease? */ |
1859 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) | |
1860 | return 0; | |
a7b72103 AA |
1861 | spin_lock(&clp->cl_lock); |
1862 | cred = ops->get_state_renewal_cred_locked(clp); | |
1863 | spin_unlock(&clp->cl_lock); | |
0f605b56 | 1864 | if (cred == NULL) { |
73d8bde5 | 1865 | cred = nfs4_get_clid_cred(clp); |
4f38e4aa | 1866 | status = -ENOKEY; |
0f605b56 TM |
1867 | if (cred == NULL) |
1868 | goto out; | |
286d7d6a | 1869 | } |
8e69514f | 1870 | status = ops->renew_lease(clp, cred); |
0f605b56 | 1871 | put_rpccred(cred); |
bc7a05ca TM |
1872 | if (status == -ETIMEDOUT) { |
1873 | set_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); | |
1874 | return 0; | |
1875 | } | |
0f605b56 | 1876 | out: |
4f7cdf18 | 1877 | return nfs4_recovery_handle_error(clp, status); |
02860014 TM |
1878 | } |
1879 | ||
47b803c8 AA |
1880 | /* Set NFS4CLNT_LEASE_EXPIRED and reclaim reboot state for all v4.0 errors |
1881 | * and for recoverable errors on EXCHANGE_ID for v4.1 | |
2a6ee6aa TM |
1882 | */ |
1883 | static int nfs4_handle_reclaim_lease_error(struct nfs_client *clp, int status) | |
1884 | { | |
1885 | switch (status) { | |
89a21736 TM |
1886 | case -NFS4ERR_SEQ_MISORDERED: |
1887 | if (test_and_set_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) | |
1888 | return -ESERVERFAULT; | |
1889 | /* Lease confirmation error: retry after purging the lease */ | |
1890 | ssleep(1); | |
47b803c8 AA |
1891 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
1892 | break; | |
2a6ee6aa TM |
1893 | case -NFS4ERR_STALE_CLIENTID: |
1894 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); | |
47b803c8 | 1895 | nfs4_state_start_reclaim_reboot(clp); |
2a6ee6aa | 1896 | break; |
de734831 CL |
1897 | case -NFS4ERR_CLID_INUSE: |
1898 | pr_err("NFS: Server %s reports our clientid is in use\n", | |
1899 | clp->cl_hostname); | |
1900 | nfs_mark_client_ready(clp, -EPERM); | |
1901 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); | |
1902 | return -EPERM; | |
2a6ee6aa | 1903 | case -EACCES: |
2a6ee6aa TM |
1904 | case -NFS4ERR_DELAY: |
1905 | case -ETIMEDOUT: | |
1906 | case -EAGAIN: | |
1907 | ssleep(1); | |
1908 | break; | |
1909 | ||
1910 | case -NFS4ERR_MINOR_VERS_MISMATCH: | |
1911 | if (clp->cl_cons_state == NFS_CS_SESSION_INITING) | |
1912 | nfs_mark_client_ready(clp, -EPROTONOSUPPORT); | |
cc0a9843 TM |
1913 | dprintk("%s: exit with error %d for server %s\n", |
1914 | __func__, -EPROTONOSUPPORT, clp->cl_hostname); | |
2a6ee6aa | 1915 | return -EPROTONOSUPPORT; |
2a6ee6aa TM |
1916 | case -NFS4ERR_NOT_SAME: /* FixMe: implement recovery |
1917 | * in nfs4_exchange_id */ | |
1918 | default: | |
cc0a9843 TM |
1919 | dprintk("%s: exit with error %d for server %s\n", __func__, |
1920 | status, clp->cl_hostname); | |
2a6ee6aa TM |
1921 | return status; |
1922 | } | |
1923 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
cc0a9843 TM |
1924 | dprintk("%s: handled error %d for server %s\n", __func__, status, |
1925 | clp->cl_hostname); | |
2a6ee6aa TM |
1926 | return 0; |
1927 | } | |
1928 | ||
b42353ff | 1929 | static int nfs4_establish_lease(struct nfs_client *clp) |
02860014 TM |
1930 | { |
1931 | struct rpc_cred *cred; | |
c48f4f35 TM |
1932 | const struct nfs4_state_recovery_ops *ops = |
1933 | clp->cl_mvops->reboot_recovery_ops; | |
2a6ee6aa | 1934 | int status; |
02860014 | 1935 | |
5cae02f4 | 1936 | nfs4_begin_drain_session(clp); |
73d8bde5 | 1937 | cred = nfs4_get_clid_cred(clp); |
2a6ee6aa TM |
1938 | if (cred == NULL) |
1939 | return -ENOENT; | |
1940 | status = ops->establish_clid(clp, cred); | |
1941 | put_rpccred(cred); | |
1942 | if (status != 0) | |
b42353ff TM |
1943 | return status; |
1944 | pnfs_destroy_all_layouts(clp); | |
1945 | return 0; | |
1946 | } | |
1947 | ||
6bbb4ae8 CL |
1948 | /* |
1949 | * Returns zero or a negative errno. NFS4ERR values are converted | |
1950 | * to local errno values. | |
1951 | */ | |
b42353ff TM |
1952 | static int nfs4_reclaim_lease(struct nfs_client *clp) |
1953 | { | |
1954 | int status; | |
1955 | ||
1956 | status = nfs4_establish_lease(clp); | |
1957 | if (status < 0) | |
1958 | return nfs4_handle_reclaim_lease_error(clp, status); | |
1959 | if (test_and_clear_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state)) | |
1960 | nfs4_state_start_reclaim_nograce(clp); | |
1961 | if (!test_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) | |
1962 | set_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state); | |
1963 | clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); | |
1964 | clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1965 | return 0; | |
1966 | } | |
1967 | ||
1968 | static int nfs4_purge_lease(struct nfs_client *clp) | |
1969 | { | |
1970 | int status; | |
1971 | ||
1972 | status = nfs4_establish_lease(clp); | |
1973 | if (status < 0) | |
2a6ee6aa | 1974 | return nfs4_handle_reclaim_lease_error(clp, status); |
b42353ff TM |
1975 | clear_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state); |
1976 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1977 | nfs4_state_start_reclaim_nograce(clp); | |
2a6ee6aa | 1978 | return 0; |
02860014 TM |
1979 | } |
1980 | ||
c9fdeb28 CL |
1981 | /* |
1982 | * Try remote migration of one FSID from a source server to a | |
1983 | * destination server. The source server provides a list of | |
1984 | * potential destinations. | |
1985 | * | |
1986 | * Returns zero or a negative NFS4ERR status code. | |
1987 | */ | |
1988 | static int nfs4_try_migration(struct nfs_server *server, struct rpc_cred *cred) | |
1989 | { | |
1990 | struct nfs_client *clp = server->nfs_client; | |
1991 | struct nfs4_fs_locations *locations = NULL; | |
1992 | struct inode *inode; | |
1993 | struct page *page; | |
1994 | int status, result; | |
1995 | ||
1996 | dprintk("--> %s: FSID %llx:%llx on \"%s\"\n", __func__, | |
1997 | (unsigned long long)server->fsid.major, | |
1998 | (unsigned long long)server->fsid.minor, | |
1999 | clp->cl_hostname); | |
2000 | ||
2001 | result = 0; | |
2002 | page = alloc_page(GFP_KERNEL); | |
2003 | locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL); | |
2004 | if (page == NULL || locations == NULL) { | |
2005 | dprintk("<-- %s: no memory\n", __func__); | |
2006 | goto out; | |
2007 | } | |
2008 | ||
2b0143b5 | 2009 | inode = d_inode(server->super->s_root); |
c9fdeb28 CL |
2010 | result = nfs4_proc_get_locations(inode, locations, page, cred); |
2011 | if (result) { | |
2012 | dprintk("<-- %s: failed to retrieve fs_locations: %d\n", | |
2013 | __func__, result); | |
2014 | goto out; | |
2015 | } | |
2016 | ||
2017 | result = -NFS4ERR_NXIO; | |
2018 | if (!(locations->fattr.valid & NFS_ATTR_FATTR_V4_LOCATIONS)) { | |
2019 | dprintk("<-- %s: No fs_locations data, migration skipped\n", | |
2020 | __func__); | |
2021 | goto out; | |
2022 | } | |
2023 | ||
2024 | nfs4_begin_drain_session(clp); | |
2025 | ||
2026 | status = nfs4_replace_transport(server, locations); | |
2027 | if (status != 0) { | |
2028 | dprintk("<-- %s: failed to replace transport: %d\n", | |
2029 | __func__, status); | |
2030 | goto out; | |
2031 | } | |
2032 | ||
2033 | result = 0; | |
2034 | dprintk("<-- %s: migration succeeded\n", __func__); | |
2035 | ||
2036 | out: | |
2037 | if (page != NULL) | |
2038 | __free_page(page); | |
2039 | kfree(locations); | |
2040 | if (result) { | |
2041 | pr_err("NFS: migration recovery failed (server %s)\n", | |
2042 | clp->cl_hostname); | |
2043 | set_bit(NFS_MIG_FAILED, &server->mig_status); | |
2044 | } | |
2045 | return result; | |
2046 | } | |
2047 | ||
2048 | /* | |
2049 | * Returns zero or a negative NFS4ERR status code. | |
2050 | */ | |
2051 | static int nfs4_handle_migration(struct nfs_client *clp) | |
2052 | { | |
2053 | const struct nfs4_state_maintenance_ops *ops = | |
2054 | clp->cl_mvops->state_renewal_ops; | |
2055 | struct nfs_server *server; | |
2056 | struct rpc_cred *cred; | |
2057 | ||
2058 | dprintk("%s: migration reported on \"%s\"\n", __func__, | |
2059 | clp->cl_hostname); | |
2060 | ||
2061 | spin_lock(&clp->cl_lock); | |
2062 | cred = ops->get_state_renewal_cred_locked(clp); | |
2063 | spin_unlock(&clp->cl_lock); | |
2064 | if (cred == NULL) | |
2065 | return -NFS4ERR_NOENT; | |
2066 | ||
2067 | clp->cl_mig_gen++; | |
2068 | restart: | |
2069 | rcu_read_lock(); | |
2070 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { | |
2071 | int status; | |
2072 | ||
2073 | if (server->mig_gen == clp->cl_mig_gen) | |
2074 | continue; | |
2075 | server->mig_gen = clp->cl_mig_gen; | |
2076 | ||
2077 | if (!test_and_clear_bit(NFS_MIG_IN_TRANSITION, | |
2078 | &server->mig_status)) | |
2079 | continue; | |
2080 | ||
2081 | rcu_read_unlock(); | |
2082 | status = nfs4_try_migration(server, cred); | |
2083 | if (status < 0) { | |
2084 | put_rpccred(cred); | |
2085 | return status; | |
2086 | } | |
2087 | goto restart; | |
2088 | } | |
2089 | rcu_read_unlock(); | |
2090 | put_rpccred(cred); | |
2091 | return 0; | |
2092 | } | |
2093 | ||
b7f7a66e CL |
2094 | /* |
2095 | * Test each nfs_server on the clp's cl_superblocks list to see | |
2096 | * if it's moved to another server. Stop when the server no longer | |
2097 | * returns NFS4ERR_LEASE_MOVED. | |
2098 | */ | |
2099 | static int nfs4_handle_lease_moved(struct nfs_client *clp) | |
2100 | { | |
2101 | const struct nfs4_state_maintenance_ops *ops = | |
2102 | clp->cl_mvops->state_renewal_ops; | |
2103 | struct nfs_server *server; | |
2104 | struct rpc_cred *cred; | |
2105 | ||
2106 | dprintk("%s: lease moved reported on \"%s\"\n", __func__, | |
2107 | clp->cl_hostname); | |
2108 | ||
2109 | spin_lock(&clp->cl_lock); | |
2110 | cred = ops->get_state_renewal_cred_locked(clp); | |
2111 | spin_unlock(&clp->cl_lock); | |
2112 | if (cred == NULL) | |
2113 | return -NFS4ERR_NOENT; | |
2114 | ||
2115 | clp->cl_mig_gen++; | |
2116 | restart: | |
2117 | rcu_read_lock(); | |
2118 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { | |
2119 | struct inode *inode; | |
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 | rcu_read_unlock(); | |
2127 | ||
2b0143b5 | 2128 | inode = d_inode(server->super->s_root); |
b7f7a66e CL |
2129 | status = nfs4_proc_fsid_present(inode, cred); |
2130 | if (status != -NFS4ERR_MOVED) | |
2131 | goto restart; /* wasn't this one */ | |
2132 | if (nfs4_try_migration(server, cred) == -NFS4ERR_LEASE_MOVED) | |
2133 | goto restart; /* there are more */ | |
2134 | goto out; | |
2135 | } | |
2136 | rcu_read_unlock(); | |
2137 | ||
2138 | out: | |
2139 | put_rpccred(cred); | |
2140 | return 0; | |
2141 | } | |
2142 | ||
05f4c350 CL |
2143 | /** |
2144 | * nfs4_discover_server_trunking - Detect server IP address trunking | |
2145 | * | |
2146 | * @clp: nfs_client under test | |
2147 | * @result: OUT: found nfs_client, or clp | |
2148 | * | |
2149 | * Returns zero or a negative errno. If zero is returned, | |
2150 | * an nfs_client pointer is planted in "result". | |
2151 | * | |
2152 | * Note: since we are invoked in process context, and | |
2153 | * not from inside the state manager, we cannot use | |
2154 | * nfs4_handle_reclaim_lease_error(). | |
2155 | */ | |
2156 | int nfs4_discover_server_trunking(struct nfs_client *clp, | |
2157 | struct nfs_client **result) | |
2158 | { | |
2159 | const struct nfs4_state_recovery_ops *ops = | |
2160 | clp->cl_mvops->reboot_recovery_ops; | |
05f4c350 CL |
2161 | struct rpc_clnt *clnt; |
2162 | struct rpc_cred *cred; | |
4edaa308 | 2163 | int i, status; |
05f4c350 CL |
2164 | |
2165 | dprintk("NFS: %s: testing '%s'\n", __func__, clp->cl_hostname); | |
2166 | ||
05f4c350 | 2167 | clnt = clp->cl_rpcclient; |
05f4c350 CL |
2168 | i = 0; |
2169 | ||
2170 | mutex_lock(&nfs_clid_init_mutex); | |
05f4c350 | 2171 | again: |
ea33e6c3 | 2172 | status = -ENOENT; |
73d8bde5 | 2173 | cred = nfs4_get_clid_cred(clp); |
05f4c350 CL |
2174 | if (cred == NULL) |
2175 | goto out_unlock; | |
2176 | ||
2177 | status = ops->detect_trunking(clp, result, cred); | |
2178 | put_rpccred(cred); | |
2179 | switch (status) { | |
2180 | case 0: | |
898fc11b TM |
2181 | case -EINTR: |
2182 | case -ERESTARTSYS: | |
05f4c350 | 2183 | break; |
05f4c350 | 2184 | case -ETIMEDOUT: |
150e7260 TM |
2185 | if (clnt->cl_softrtry) |
2186 | break; | |
2187 | case -NFS4ERR_DELAY: | |
05f4c350 CL |
2188 | case -EAGAIN: |
2189 | ssleep(1); | |
202c312d | 2190 | case -NFS4ERR_STALE_CLIENTID: |
05f4c350 CL |
2191 | dprintk("NFS: %s after status %d, retrying\n", |
2192 | __func__, status); | |
2193 | goto again; | |
4edaa308 | 2194 | case -EACCES: |
d688f7b8 CL |
2195 | if (i++ == 0) { |
2196 | nfs4_root_machine_cred(clp); | |
2197 | goto again; | |
2198 | } | |
6d769f1e | 2199 | if (clnt->cl_auth->au_flavor == RPC_AUTH_UNIX) |
4edaa308 | 2200 | break; |
05f4c350 CL |
2201 | case -NFS4ERR_CLID_INUSE: |
2202 | case -NFS4ERR_WRONGSEC: | |
6d769f1e JL |
2203 | /* No point in retrying if we already used RPC_AUTH_UNIX */ |
2204 | if (clnt->cl_auth->au_flavor == RPC_AUTH_UNIX) { | |
2205 | status = -EPERM; | |
2206 | break; | |
2207 | } | |
79d852bf | 2208 | clnt = rpc_clone_client_set_auth(clnt, RPC_AUTH_UNIX); |
05f4c350 CL |
2209 | if (IS_ERR(clnt)) { |
2210 | status = PTR_ERR(clnt); | |
2211 | break; | |
2212 | } | |
b193d59a TM |
2213 | /* Note: this is safe because we haven't yet marked the |
2214 | * client as ready, so we are the only user of | |
2215 | * clp->cl_rpcclient | |
2216 | */ | |
2217 | clnt = xchg(&clp->cl_rpcclient, clnt); | |
2218 | rpc_shutdown_client(clnt); | |
2219 | clnt = clp->cl_rpcclient; | |
05f4c350 CL |
2220 | goto again; |
2221 | ||
2222 | case -NFS4ERR_MINOR_VERS_MISMATCH: | |
2223 | status = -EPROTONOSUPPORT; | |
2224 | break; | |
2225 | ||
2226 | case -EKEYEXPIRED: | |
05f4c350 CL |
2227 | case -NFS4ERR_NOT_SAME: /* FixMe: implement recovery |
2228 | * in nfs4_exchange_id */ | |
2229 | status = -EKEYEXPIRED; | |
ea33e6c3 TM |
2230 | break; |
2231 | default: | |
2232 | pr_warn("NFS: %s unhandled error %d. Exiting with error EIO\n", | |
2233 | __func__, status); | |
2234 | status = -EIO; | |
05f4c350 CL |
2235 | } |
2236 | ||
2237 | out_unlock: | |
2238 | mutex_unlock(&nfs_clid_init_mutex); | |
05f4c350 CL |
2239 | dprintk("NFS: %s: status = %d\n", __func__, status); |
2240 | return status; | |
2241 | } | |
2242 | ||
76db6d95 | 2243 | #ifdef CONFIG_NFS_V4_1 |
9f594791 | 2244 | void nfs4_schedule_session_recovery(struct nfs4_session *session, int err) |
0400a6b0 | 2245 | { |
444f72fe TM |
2246 | struct nfs_client *clp = session->clp; |
2247 | ||
9f594791 TM |
2248 | switch (err) { |
2249 | default: | |
2250 | set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); | |
2251 | break; | |
2252 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
2253 | set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); | |
2254 | } | |
d94cbf6c | 2255 | nfs4_schedule_state_manager(clp); |
0400a6b0 | 2256 | } |
cbdabc7f | 2257 | EXPORT_SYMBOL_GPL(nfs4_schedule_session_recovery); |
0400a6b0 | 2258 | |
3f10a6af | 2259 | void nfs41_notify_server(struct nfs_client *clp) |
ac074835 TM |
2260 | { |
2261 | /* Use CHECK_LEASE to ping the server with a SEQUENCE */ | |
2262 | set_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); | |
2263 | nfs4_schedule_state_manager(clp); | |
2264 | } | |
2265 | ||
0f79fd6f TM |
2266 | static void nfs4_reset_all_state(struct nfs_client *clp) |
2267 | { | |
2268 | if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) == 0) { | |
2c820d9a | 2269 | set_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state); |
be0bfed0 | 2270 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
0f79fd6f | 2271 | nfs4_state_start_reclaim_nograce(clp); |
cc0a9843 TM |
2272 | dprintk("%s: scheduling reset of all state for server %s!\n", |
2273 | __func__, clp->cl_hostname); | |
0400a6b0 | 2274 | nfs4_schedule_state_manager(clp); |
0f79fd6f TM |
2275 | } |
2276 | } | |
2277 | ||
2278 | static void nfs41_handle_server_reboot(struct nfs_client *clp) | |
2279 | { | |
2280 | if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) == 0) { | |
2281 | nfs4_state_start_reclaim_reboot(clp); | |
cc0a9843 TM |
2282 | dprintk("%s: server %s rebooted!\n", __func__, |
2283 | clp->cl_hostname); | |
0400a6b0 | 2284 | nfs4_schedule_state_manager(clp); |
0f79fd6f TM |
2285 | } |
2286 | } | |
2287 | ||
8b895ce6 | 2288 | static void nfs41_handle_all_state_revoked(struct nfs_client *clp) |
0f79fd6f | 2289 | { |
0f79fd6f | 2290 | nfs4_reset_all_state(clp); |
cc0a9843 | 2291 | dprintk("%s: state revoked on server %s\n", __func__, clp->cl_hostname); |
0f79fd6f TM |
2292 | } |
2293 | ||
8b895ce6 TM |
2294 | static void nfs41_handle_some_state_revoked(struct nfs_client *clp) |
2295 | { | |
45870d69 | 2296 | nfs4_state_start_reclaim_nograce(clp); |
8b895ce6 TM |
2297 | nfs4_schedule_state_manager(clp); |
2298 | ||
2299 | dprintk("%s: state revoked on server %s\n", __func__, clp->cl_hostname); | |
2300 | } | |
2301 | ||
0f79fd6f TM |
2302 | static void nfs41_handle_recallable_state_revoked(struct nfs_client *clp) |
2303 | { | |
4099287f TM |
2304 | /* FIXME: For now, we destroy all layouts. */ |
2305 | pnfs_destroy_all_layouts(clp); | |
2306 | /* FIXME: For now, we test all delegations+open state+locks. */ | |
2307 | nfs41_handle_some_state_revoked(clp); | |
cc0a9843 TM |
2308 | dprintk("%s: Recallable state revoked on server %s!\n", __func__, |
2309 | clp->cl_hostname); | |
0f79fd6f TM |
2310 | } |
2311 | ||
a9e64442 | 2312 | static void nfs41_handle_backchannel_fault(struct nfs_client *clp) |
0f79fd6f | 2313 | { |
b1352905 TM |
2314 | set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); |
2315 | nfs4_schedule_state_manager(clp); | |
2316 | ||
cc0a9843 TM |
2317 | dprintk("%s: server %s declared a backchannel fault\n", __func__, |
2318 | clp->cl_hostname); | |
0f79fd6f TM |
2319 | } |
2320 | ||
a9e64442 WAA |
2321 | static void nfs41_handle_cb_path_down(struct nfs_client *clp) |
2322 | { | |
2323 | if (test_and_set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, | |
2324 | &clp->cl_state) == 0) | |
2325 | nfs4_schedule_state_manager(clp); | |
2326 | } | |
2327 | ||
0a014a44 TM |
2328 | void nfs41_handle_sequence_flag_errors(struct nfs_client *clp, u32 flags, |
2329 | bool recovery) | |
0629e370 AB |
2330 | { |
2331 | if (!flags) | |
2332 | return; | |
2c820d9a CL |
2333 | |
2334 | dprintk("%s: \"%s\" (client ID %llx) flags=0x%08x\n", | |
2335 | __func__, clp->cl_hostname, clp->cl_clientid, flags); | |
0a014a44 TM |
2336 | /* |
2337 | * If we're called from the state manager thread, then assume we're | |
2338 | * already handling the RECLAIM_NEEDED and/or STATE_REVOKED. | |
2339 | * Those flags are expected to remain set until we're done | |
2340 | * recovering (see RFC5661, section 18.46.3). | |
2341 | */ | |
2342 | if (recovery) | |
2343 | goto out_recovery; | |
2c820d9a | 2344 | |
111d489f | 2345 | if (flags & SEQ4_STATUS_RESTART_RECLAIM_NEEDED) |
0f79fd6f | 2346 | nfs41_handle_server_reboot(clp); |
8b895ce6 TM |
2347 | if (flags & (SEQ4_STATUS_EXPIRED_ALL_STATE_REVOKED)) |
2348 | nfs41_handle_all_state_revoked(clp); | |
2349 | if (flags & (SEQ4_STATUS_EXPIRED_SOME_STATE_REVOKED | | |
d1c2331e | 2350 | SEQ4_STATUS_ADMIN_STATE_REVOKED)) |
8b895ce6 | 2351 | nfs41_handle_some_state_revoked(clp); |
d1c2331e CL |
2352 | if (flags & SEQ4_STATUS_LEASE_MOVED) |
2353 | nfs4_schedule_lease_moved_recovery(clp); | |
111d489f | 2354 | if (flags & SEQ4_STATUS_RECALLABLE_STATE_REVOKED) |
0f79fd6f | 2355 | nfs41_handle_recallable_state_revoked(clp); |
0a014a44 | 2356 | out_recovery: |
a9e64442 WAA |
2357 | if (flags & SEQ4_STATUS_BACKCHANNEL_FAULT) |
2358 | nfs41_handle_backchannel_fault(clp); | |
2359 | else if (flags & (SEQ4_STATUS_CB_PATH_DOWN | | |
2360 | SEQ4_STATUS_CB_PATH_DOWN_SESSION)) | |
0f79fd6f | 2361 | nfs41_handle_cb_path_down(clp); |
0629e370 AB |
2362 | } |
2363 | ||
c3fad1b1 AA |
2364 | static int nfs4_reset_session(struct nfs_client *clp) |
2365 | { | |
848f5bda | 2366 | struct rpc_cred *cred; |
c3fad1b1 AA |
2367 | int status; |
2368 | ||
1a47e7a6 TM |
2369 | if (!nfs4_has_session(clp)) |
2370 | return 0; | |
38045412 | 2371 | nfs4_begin_drain_session(clp); |
73d8bde5 | 2372 | cred = nfs4_get_clid_cred(clp); |
848f5bda | 2373 | status = nfs4_proc_destroy_session(clp->cl_session, cred); |
c489ee29 TM |
2374 | switch (status) { |
2375 | case 0: | |
2376 | case -NFS4ERR_BADSESSION: | |
2377 | case -NFS4ERR_DEADSESSION: | |
2378 | break; | |
2379 | case -NFS4ERR_BACK_CHAN_BUSY: | |
2380 | case -NFS4ERR_DELAY: | |
2381 | set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); | |
2382 | status = 0; | |
2383 | ssleep(1); | |
2384 | goto out; | |
2385 | default: | |
f455848a | 2386 | status = nfs4_recovery_handle_error(clp, status); |
c3fad1b1 AA |
2387 | goto out; |
2388 | } | |
2389 | ||
2390 | memset(clp->cl_session->sess_id.data, 0, NFS4_MAX_SESSIONID_LEN); | |
848f5bda | 2391 | status = nfs4_proc_create_session(clp, cred); |
41f54a55 | 2392 | if (status) { |
cc0a9843 TM |
2393 | dprintk("%s: session reset failed with status %d for server %s!\n", |
2394 | __func__, status, clp->cl_hostname); | |
f2c1b510 | 2395 | status = nfs4_handle_reclaim_lease_error(clp, status); |
41f54a55 AA |
2396 | goto out; |
2397 | } | |
bda197f5 | 2398 | nfs41_finish_session_reset(clp); |
cc0a9843 TM |
2399 | dprintk("%s: session reset was successful for server %s!\n", |
2400 | __func__, clp->cl_hostname); | |
41f54a55 | 2401 | out: |
848f5bda TM |
2402 | if (cred) |
2403 | put_rpccred(cred); | |
c3fad1b1 AA |
2404 | return status; |
2405 | } | |
76db6d95 | 2406 | |
a9e64442 WAA |
2407 | static int nfs4_bind_conn_to_session(struct nfs_client *clp) |
2408 | { | |
2cf047c9 TM |
2409 | struct rpc_cred *cred; |
2410 | int ret; | |
2411 | ||
1a47e7a6 TM |
2412 | if (!nfs4_has_session(clp)) |
2413 | return 0; | |
43ac544c | 2414 | nfs4_begin_drain_session(clp); |
73d8bde5 | 2415 | cred = nfs4_get_clid_cred(clp); |
2cf047c9 TM |
2416 | ret = nfs4_proc_bind_conn_to_session(clp, cred); |
2417 | if (cred) | |
2418 | put_rpccred(cred); | |
43ac544c | 2419 | clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); |
bf674c82 TM |
2420 | switch (ret) { |
2421 | case 0: | |
cc0a9843 TM |
2422 | dprintk("%s: bind_conn_to_session was successful for server %s!\n", |
2423 | __func__, clp->cl_hostname); | |
bf674c82 TM |
2424 | break; |
2425 | case -NFS4ERR_DELAY: | |
2426 | ssleep(1); | |
2427 | set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); | |
2428 | break; | |
2429 | default: | |
2430 | return nfs4_recovery_handle_error(clp, ret); | |
2431 | } | |
2432 | return 0; | |
a9e64442 | 2433 | } |
76db6d95 | 2434 | #else /* CONFIG_NFS_V4_1 */ |
c3fad1b1 | 2435 | static int nfs4_reset_session(struct nfs_client *clp) { return 0; } |
a9e64442 WAA |
2436 | |
2437 | static int nfs4_bind_conn_to_session(struct nfs_client *clp) | |
2438 | { | |
2439 | return 0; | |
2440 | } | |
76db6d95 AA |
2441 | #endif /* CONFIG_NFS_V4_1 */ |
2442 | ||
e005e804 | 2443 | static void nfs4_state_manager(struct nfs_client *clp) |
02860014 | 2444 | { |
02860014 | 2445 | int status = 0; |
8ed27d4f | 2446 | const char *section = "", *section_sep = ""; |
02860014 | 2447 | |
02860014 | 2448 | /* Ensure exclusive access to NFSv4 state */ |
47c2199b | 2449 | do { |
2c820d9a | 2450 | if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) { |
8ed27d4f | 2451 | section = "purge state"; |
b42353ff | 2452 | status = nfs4_purge_lease(clp); |
2a6ee6aa TM |
2453 | if (status < 0) |
2454 | goto out_error; | |
b42353ff | 2455 | continue; |
2c820d9a CL |
2456 | } |
2457 | ||
b42353ff | 2458 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) { |
8ed27d4f | 2459 | section = "lease expired"; |
b79a4a1b TM |
2460 | /* We're going to have to re-establish a clientid */ |
2461 | status = nfs4_reclaim_lease(clp); | |
2a6ee6aa | 2462 | if (status < 0) |
b79a4a1b | 2463 | goto out_error; |
b42353ff | 2464 | continue; |
e598d843 TM |
2465 | } |
2466 | ||
c3fad1b1 | 2467 | /* Initialize or reset the session */ |
1a47e7a6 | 2468 | if (test_and_clear_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state)) { |
8ed27d4f | 2469 | section = "reset session"; |
4d643d1d | 2470 | status = nfs4_reset_session(clp); |
b6d408ba TM |
2471 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
2472 | continue; | |
2473 | if (status < 0) | |
76db6d95 | 2474 | goto out_error; |
76db6d95 | 2475 | } |
b6d408ba | 2476 | |
a9e64442 WAA |
2477 | /* Send BIND_CONN_TO_SESSION */ |
2478 | if (test_and_clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION, | |
1a47e7a6 | 2479 | &clp->cl_state)) { |
8ed27d4f | 2480 | section = "bind conn to session"; |
a9e64442 WAA |
2481 | status = nfs4_bind_conn_to_session(clp); |
2482 | if (status < 0) | |
2483 | goto out_error; | |
bf674c82 | 2484 | continue; |
a9e64442 WAA |
2485 | } |
2486 | ||
5df904ae TM |
2487 | if (test_and_clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state)) { |
2488 | section = "check lease"; | |
2489 | status = nfs4_check_lease(clp); | |
2490 | if (status < 0) | |
2491 | goto out_error; | |
8faaa6d5 | 2492 | continue; |
c9fdeb28 CL |
2493 | } |
2494 | ||
2495 | if (test_and_clear_bit(NFS4CLNT_MOVED, &clp->cl_state)) { | |
2496 | section = "migration"; | |
2497 | status = nfs4_handle_migration(clp); | |
2498 | if (status < 0) | |
2499 | goto out_error; | |
5df904ae TM |
2500 | } |
2501 | ||
b7f7a66e CL |
2502 | if (test_and_clear_bit(NFS4CLNT_LEASE_MOVED, &clp->cl_state)) { |
2503 | section = "lease moved"; | |
2504 | status = nfs4_handle_lease_moved(clp); | |
2505 | if (status < 0) | |
2506 | goto out_error; | |
2507 | } | |
2508 | ||
b79a4a1b | 2509 | /* First recover reboot state... */ |
e345e88a | 2510 | if (test_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) { |
8ed27d4f | 2511 | section = "reclaim reboot"; |
591d71cb | 2512 | status = nfs4_do_reclaim(clp, |
c48f4f35 | 2513 | clp->cl_mvops->reboot_recovery_ops); |
df817ba3 | 2514 | if (status == -EAGAIN) |
b6d408ba TM |
2515 | continue; |
2516 | if (status < 0) | |
2517 | goto out_error; | |
df817ba3 | 2518 | nfs4_state_end_reclaim_reboot(clp); |
02860014 TM |
2519 | } |
2520 | ||
45870d69 TM |
2521 | /* Detect expired delegations... */ |
2522 | if (test_and_clear_bit(NFS4CLNT_DELEGATION_EXPIRED, &clp->cl_state)) { | |
2523 | section = "detect expired delegations"; | |
2524 | nfs_reap_expired_delegations(clp); | |
2525 | continue; | |
2526 | } | |
2527 | ||
b79a4a1b TM |
2528 | /* Now recover expired state... */ |
2529 | if (test_and_clear_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) { | |
8ed27d4f | 2530 | section = "reclaim nograce"; |
591d71cb | 2531 | status = nfs4_do_reclaim(clp, |
c48f4f35 | 2532 | clp->cl_mvops->nograce_recovery_ops); |
df817ba3 | 2533 | if (status == -EAGAIN) |
b6d408ba TM |
2534 | continue; |
2535 | if (status < 0) | |
b79a4a1b | 2536 | goto out_error; |
1da177e4 | 2537 | } |
707fb4b3 | 2538 | |
5601a00d | 2539 | nfs4_end_drain_session(clp); |
707fb4b3 TM |
2540 | if (test_and_clear_bit(NFS4CLNT_DELEGRETURN, &clp->cl_state)) { |
2541 | nfs_client_return_marked_delegations(clp); | |
2542 | continue; | |
2543 | } | |
e005e804 TM |
2544 | |
2545 | nfs4_clear_state_manager_bit(clp); | |
f3c76491 TM |
2546 | /* Did we race with an attempt to give us more work? */ |
2547 | if (clp->cl_state == 0) | |
2548 | break; | |
2549 | if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) != 0) | |
2550 | break; | |
212bf41d | 2551 | } while (refcount_read(&clp->cl_count) > 1); |
e005e804 | 2552 | return; |
1da177e4 | 2553 | out_error: |
8ed27d4f WAA |
2554 | if (strlen(section)) |
2555 | section_sep = ": "; | |
2556 | pr_warn_ratelimited("NFS: state manager%s%s failed on NFSv4 server %s" | |
2557 | " with error %d\n", section_sep, section, | |
2558 | clp->cl_hostname, -status); | |
ffe5a830 | 2559 | ssleep(1); |
5601a00d | 2560 | nfs4_end_drain_session(clp); |
e005e804 TM |
2561 | nfs4_clear_state_manager_bit(clp); |
2562 | } | |
2563 | ||
2564 | static int nfs4_run_state_manager(void *ptr) | |
2565 | { | |
2566 | struct nfs_client *clp = ptr; | |
2567 | ||
2568 | allow_signal(SIGKILL); | |
2569 | nfs4_state_manager(clp); | |
2570 | nfs_put_client(clp); | |
2571 | module_put_and_exit(0); | |
2572 | return 0; | |
1da177e4 LT |
2573 | } |
2574 | ||
2575 | /* | |
2576 | * Local variables: | |
2577 | * c-basic-offset: 8 | |
2578 | * End: | |
2579 | */ |