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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" |
511ba52e | 63 | #include "nfs4trace.h" |
1da177e4 | 64 | |
e3c0fb7e CL |
65 | #define NFSDBG_FACILITY NFSDBG_STATE |
66 | ||
1da177e4 LT |
67 | #define OPENOWNER_POOL_SIZE 8 |
68 | ||
93b717fd | 69 | const nfs4_stateid zero_stateid = { |
e0714ec4 | 70 | { .data = { 0 } }, |
93b717fd TM |
71 | .type = NFS4_SPECIAL_STATEID_TYPE, |
72 | }; | |
fcd8843c TM |
73 | const nfs4_stateid invalid_stateid = { |
74 | { | |
445f288d TM |
75 | /* Funky initialiser keeps older gcc versions happy */ |
76 | .data = { 0xff, 0xff, 0xff, 0xff, 0 }, | |
fcd8843c TM |
77 | }, |
78 | .type = NFS4_INVALID_STATEID_TYPE, | |
79 | }; | |
80 | ||
2409a976 FI |
81 | const nfs4_stateid current_stateid = { |
82 | { | |
83 | /* Funky initialiser keeps older gcc versions happy */ | |
84 | .data = { 0x0, 0x0, 0x0, 0x1, 0 }, | |
85 | }, | |
86 | .type = NFS4_SPECIAL_STATEID_TYPE, | |
87 | }; | |
88 | ||
05f4c350 | 89 | static DEFINE_MUTEX(nfs_clid_init_mutex); |
1da177e4 | 90 | |
5b596830 DB |
91 | static int nfs4_setup_state_renewal(struct nfs_client *clp) |
92 | { | |
93 | int status; | |
94 | struct nfs_fsinfo fsinfo; | |
5b596830 DB |
95 | |
96 | if (!test_bit(NFS_CS_CHECK_LEASE_TIME, &clp->cl_res_state)) { | |
97 | nfs4_schedule_state_renewal(clp); | |
98 | return 0; | |
99 | } | |
100 | ||
5b596830 DB |
101 | status = nfs4_proc_get_lease_time(clp, &fsinfo); |
102 | if (status == 0) { | |
7dc2993a | 103 | nfs4_set_lease_period(clp, fsinfo.lease_time * HZ); |
5b596830 DB |
104 | nfs4_schedule_state_renewal(clp); |
105 | } | |
106 | ||
107 | return status; | |
108 | } | |
109 | ||
a52458b4 | 110 | int nfs4_init_clientid(struct nfs_client *clp, const struct cred *cred) |
1da177e4 | 111 | { |
fd954ae1 TM |
112 | struct nfs4_setclientid_res clid = { |
113 | .clientid = clp->cl_clientid, | |
114 | .confirm = clp->cl_confirm, | |
115 | }; | |
f738f517 CL |
116 | unsigned short port; |
117 | int status; | |
bbe0a3aa | 118 | struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); |
f738f517 | 119 | |
fd954ae1 TM |
120 | if (test_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state)) |
121 | goto do_confirm; | |
bbe0a3aa | 122 | port = nn->nfs_callback_tcpport; |
f738f517 | 123 | if (clp->cl_addr.ss_family == AF_INET6) |
29dcc16a | 124 | port = nn->nfs_callback_tcpport6; |
f738f517 | 125 | |
bb8b27e5 TM |
126 | status = nfs4_proc_setclientid(clp, NFS4_CALLBACK, port, cred, &clid); |
127 | if (status != 0) | |
128 | goto out; | |
fd954ae1 TM |
129 | clp->cl_clientid = clid.clientid; |
130 | clp->cl_confirm = clid.confirm; | |
131 | set_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); | |
132 | do_confirm: | |
bb8b27e5 TM |
133 | status = nfs4_proc_setclientid_confirm(clp, &clid, cred); |
134 | if (status != 0) | |
135 | goto out; | |
fd954ae1 | 136 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
5b596830 | 137 | nfs4_setup_state_renewal(clp); |
bb8b27e5 | 138 | out: |
1da177e4 LT |
139 | return status; |
140 | } | |
141 | ||
05f4c350 CL |
142 | /** |
143 | * nfs40_discover_server_trunking - Detect server IP address trunking (mv0) | |
144 | * | |
145 | * @clp: nfs_client under test | |
146 | * @result: OUT: found nfs_client, or clp | |
147 | * @cred: credential to use for trunking test | |
148 | * | |
149 | * Returns zero, a negative errno, or a negative NFS4ERR status. | |
150 | * If zero is returned, an nfs_client pointer is planted in | |
151 | * "result". | |
152 | * | |
153 | * Note: The returned client may not yet be marked ready. | |
154 | */ | |
155 | int nfs40_discover_server_trunking(struct nfs_client *clp, | |
156 | struct nfs_client **result, | |
a52458b4 | 157 | const struct cred *cred) |
05f4c350 CL |
158 | { |
159 | struct nfs4_setclientid_res clid = { | |
160 | .clientid = clp->cl_clientid, | |
161 | .confirm = clp->cl_confirm, | |
162 | }; | |
9f62387d | 163 | struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); |
05f4c350 CL |
164 | unsigned short port; |
165 | int status; | |
166 | ||
9f62387d | 167 | port = nn->nfs_callback_tcpport; |
05f4c350 | 168 | if (clp->cl_addr.ss_family == AF_INET6) |
9f62387d | 169 | port = nn->nfs_callback_tcpport6; |
05f4c350 CL |
170 | |
171 | status = nfs4_proc_setclientid(clp, NFS4_CALLBACK, port, cred, &clid); | |
172 | if (status != 0) | |
173 | goto out; | |
174 | clp->cl_clientid = clid.clientid; | |
175 | clp->cl_confirm = clid.confirm; | |
176 | ||
177 | status = nfs40_walk_client_list(clp, result, cred); | |
202c312d | 178 | if (status == 0) { |
05f4c350 CL |
179 | /* Sustain the lease, even if it's empty. If the clientid4 |
180 | * goes stale it's of no use for trunking discovery. */ | |
181 | nfs4_schedule_state_renewal(*result); | |
f02f3755 Z |
182 | |
183 | /* If the client state need to recover, do it. */ | |
184 | if (clp->cl_state) | |
185 | nfs4_schedule_state_manager(clp); | |
05f4c350 | 186 | } |
05f4c350 CL |
187 | out: |
188 | return status; | |
189 | } | |
190 | ||
a52458b4 | 191 | const struct cred *nfs4_get_machine_cred(struct nfs_client *clp) |
a2b2bb88 | 192 | { |
a52458b4 | 193 | return get_cred(rpc_machine_cred()); |
a2b2bb88 TM |
194 | } |
195 | ||
d688f7b8 CL |
196 | static void nfs4_root_machine_cred(struct nfs_client *clp) |
197 | { | |
d688f7b8 | 198 | |
5e16923b N |
199 | /* Force root creds instead of machine */ |
200 | clp->cl_principal = NULL; | |
201 | clp->cl_rpcclient->cl_principal = NULL; | |
d688f7b8 CL |
202 | } |
203 | ||
a52458b4 | 204 | static const struct cred * |
24d292b8 | 205 | nfs4_get_renew_cred_server_locked(struct nfs_server *server) |
b4454fe1 | 206 | { |
a52458b4 | 207 | const struct cred *cred = NULL; |
b4454fe1 | 208 | struct nfs4_state_owner *sp; |
9f958ab8 | 209 | struct rb_node *pos; |
b4454fe1 | 210 | |
24d292b8 CL |
211 | for (pos = rb_first(&server->state_owners); |
212 | pos != NULL; | |
213 | pos = rb_next(pos)) { | |
214 | sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); | |
b4454fe1 TM |
215 | if (list_empty(&sp->so_states)) |
216 | continue; | |
a52458b4 | 217 | cred = get_cred(sp->so_cred); |
b4454fe1 TM |
218 | break; |
219 | } | |
220 | return cred; | |
221 | } | |
222 | ||
24d292b8 | 223 | /** |
f15e1e8b | 224 | * nfs4_get_renew_cred - Acquire credential for a renew operation |
24d292b8 CL |
225 | * @clp: client state handle |
226 | * | |
227 | * Returns an rpc_cred with reference count bumped, or NULL. | |
228 | * Caller must hold clp->cl_lock. | |
229 | */ | |
a52458b4 | 230 | const struct cred *nfs4_get_renew_cred(struct nfs_client *clp) |
24d292b8 | 231 | { |
a52458b4 | 232 | const struct cred *cred = NULL; |
24d292b8 CL |
233 | struct nfs_server *server; |
234 | ||
e49a29bd | 235 | /* Use machine credentials if available */ |
f15e1e8b | 236 | cred = nfs4_get_machine_cred(clp); |
e49a29bd SP |
237 | if (cred != NULL) |
238 | goto out; | |
239 | ||
f15e1e8b | 240 | spin_lock(&clp->cl_lock); |
24d292b8 CL |
241 | rcu_read_lock(); |
242 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { | |
243 | cred = nfs4_get_renew_cred_server_locked(server); | |
244 | if (cred != NULL) | |
245 | break; | |
246 | } | |
247 | rcu_read_unlock(); | |
f15e1e8b | 248 | spin_unlock(&clp->cl_lock); |
e49a29bd SP |
249 | |
250 | out: | |
24d292b8 CL |
251 | return cred; |
252 | } | |
253 | ||
62f288a0 | 254 | static void nfs4_end_drain_slot_table(struct nfs4_slot_table *tbl) |
9dfdf404 | 255 | { |
774d5f14 | 256 | if (test_and_clear_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state)) { |
961a828d | 257 | spin_lock(&tbl->slot_tbl_lock); |
b75ad4cd | 258 | nfs41_wake_slot_table(tbl); |
961a828d | 259 | spin_unlock(&tbl->slot_tbl_lock); |
689cf5c1 | 260 | } |
9dfdf404 RL |
261 | } |
262 | ||
62f288a0 AA |
263 | static void nfs4_end_drain_session(struct nfs_client *clp) |
264 | { | |
265 | struct nfs4_session *ses = clp->cl_session; | |
266 | ||
2cf8bca8 CL |
267 | if (clp->cl_slot_tbl) { |
268 | nfs4_end_drain_slot_table(clp->cl_slot_tbl); | |
269 | return; | |
270 | } | |
271 | ||
62f288a0 AA |
272 | if (ses != NULL) { |
273 | nfs4_end_drain_slot_table(&ses->bc_slot_table); | |
274 | nfs4_end_drain_slot_table(&ses->fc_slot_table); | |
275 | } | |
276 | } | |
277 | ||
774d5f14 | 278 | static int nfs4_drain_slot_tbl(struct nfs4_slot_table *tbl) |
9dfdf404 | 279 | { |
774d5f14 | 280 | set_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state); |
9dfdf404 | 281 | spin_lock(&tbl->slot_tbl_lock); |
b6bf6e7d | 282 | if (tbl->highest_used_slotid != NFS4_NO_SLOT) { |
16735d02 | 283 | reinit_completion(&tbl->complete); |
9dfdf404 | 284 | spin_unlock(&tbl->slot_tbl_lock); |
42acd021 | 285 | return wait_for_completion_interruptible(&tbl->complete); |
9dfdf404 RL |
286 | } |
287 | spin_unlock(&tbl->slot_tbl_lock); | |
288 | return 0; | |
289 | } | |
290 | ||
42acd021 AA |
291 | static int nfs4_begin_drain_session(struct nfs_client *clp) |
292 | { | |
293 | struct nfs4_session *ses = clp->cl_session; | |
8aafd2fd | 294 | int ret; |
42acd021 | 295 | |
2cf8bca8 CL |
296 | if (clp->cl_slot_tbl) |
297 | return nfs4_drain_slot_tbl(clp->cl_slot_tbl); | |
298 | ||
42acd021 | 299 | /* back channel */ |
774d5f14 | 300 | ret = nfs4_drain_slot_tbl(&ses->bc_slot_table); |
42acd021 AA |
301 | if (ret) |
302 | return ret; | |
303 | /* fore channel */ | |
774d5f14 | 304 | return nfs4_drain_slot_tbl(&ses->fc_slot_table); |
42acd021 AA |
305 | } |
306 | ||
c9fdeb28 CL |
307 | #if defined(CONFIG_NFS_V4_1) |
308 | ||
bda197f5 TM |
309 | static void nfs41_finish_session_reset(struct nfs_client *clp) |
310 | { | |
311 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); | |
312 | clear_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); | |
313 | /* create_session negotiated new slot table */ | |
bda197f5 | 314 | clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); |
ea51efaa | 315 | nfs4_setup_state_renewal(clp); |
bda197f5 TM |
316 | } |
317 | ||
a52458b4 | 318 | int nfs41_init_clientid(struct nfs_client *clp, const struct cred *cred) |
4d643d1d AA |
319 | { |
320 | int status; | |
321 | ||
fd954ae1 TM |
322 | if (test_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state)) |
323 | goto do_confirm; | |
4d643d1d | 324 | status = nfs4_proc_exchange_id(clp, cred); |
9430fb6b RL |
325 | if (status != 0) |
326 | goto out; | |
fd954ae1 TM |
327 | set_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
328 | do_confirm: | |
848f5bda | 329 | status = nfs4_proc_create_session(clp, cred); |
9430fb6b RL |
330 | if (status != 0) |
331 | goto out; | |
bda197f5 | 332 | nfs41_finish_session_reset(clp); |
9430fb6b RL |
333 | nfs_mark_client_ready(clp, NFS_CS_READY); |
334 | out: | |
4d643d1d AA |
335 | return status; |
336 | } | |
337 | ||
05f4c350 CL |
338 | /** |
339 | * nfs41_discover_server_trunking - Detect server IP address trunking (mv1) | |
340 | * | |
341 | * @clp: nfs_client under test | |
342 | * @result: OUT: found nfs_client, or clp | |
343 | * @cred: credential to use for trunking test | |
344 | * | |
345 | * Returns NFS4_OK, a negative errno, or a negative NFS4ERR status. | |
346 | * If NFS4_OK is returned, an nfs_client pointer is planted in | |
347 | * "result". | |
348 | * | |
349 | * Note: The returned client may not yet be marked ready. | |
350 | */ | |
351 | int nfs41_discover_server_trunking(struct nfs_client *clp, | |
352 | struct nfs_client **result, | |
a52458b4 | 353 | const struct cred *cred) |
05f4c350 CL |
354 | { |
355 | int status; | |
356 | ||
357 | status = nfs4_proc_exchange_id(clp, cred); | |
358 | if (status != NFS4_OK) | |
359 | return status; | |
360 | ||
48d66b97 TM |
361 | status = nfs41_walk_client_list(clp, result, cred); |
362 | if (status < 0) | |
363 | return status; | |
364 | if (clp != *result) | |
365 | return 0; | |
366 | ||
8dcbec6d CL |
367 | /* |
368 | * Purge state if the client id was established in a prior | |
369 | * instance and the client id could not have arrived on the | |
370 | * server via Transparent State Migration. | |
371 | */ | |
372 | if (clp->cl_exchange_flags & EXCHGID4_FLAG_CONFIRMED_R) { | |
373 | if (!test_bit(NFS_CS_TSM_POSSIBLE, &clp->cl_flags)) | |
374 | set_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state); | |
375 | else | |
376 | set_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); | |
377 | } | |
48d66b97 TM |
378 | nfs4_schedule_state_manager(clp); |
379 | status = nfs_wait_client_init_complete(clp); | |
380 | if (status < 0) | |
381 | nfs_put_client(clp); | |
382 | return status; | |
05f4c350 CL |
383 | } |
384 | ||
b4b82607 AA |
385 | #endif /* CONFIG_NFS_V4_1 */ |
386 | ||
24d292b8 | 387 | /** |
73d8bde5 | 388 | * nfs4_get_clid_cred - Acquire credential for a setclientid operation |
24d292b8 CL |
389 | * @clp: client state handle |
390 | * | |
a52458b4 | 391 | * Returns a cred with reference count bumped, or NULL. |
24d292b8 | 392 | */ |
a52458b4 | 393 | const struct cred *nfs4_get_clid_cred(struct nfs_client *clp) |
24d292b8 | 394 | { |
a52458b4 | 395 | const struct cred *cred; |
286d7d6a | 396 | |
f15e1e8b | 397 | cred = nfs4_get_machine_cred(clp); |
a2b2bb88 | 398 | return cred; |
286d7d6a TM |
399 | } |
400 | ||
1da177e4 | 401 | static struct nfs4_state_owner * |
a52458b4 | 402 | nfs4_find_state_owner_locked(struct nfs_server *server, const struct cred *cred) |
1da177e4 | 403 | { |
24d292b8 | 404 | struct rb_node **p = &server->state_owners.rb_node, |
9f958ab8 | 405 | *parent = NULL; |
414adf14 | 406 | struct nfs4_state_owner *sp; |
a52458b4 | 407 | int cmp; |
1da177e4 | 408 | |
9f958ab8 TM |
409 | while (*p != NULL) { |
410 | parent = *p; | |
24d292b8 | 411 | sp = rb_entry(parent, struct nfs4_state_owner, so_server_node); |
a52458b4 | 412 | cmp = cred_fscmp(cred, sp->so_cred); |
9f958ab8 | 413 | |
a52458b4 | 414 | if (cmp < 0) |
9f958ab8 | 415 | p = &parent->rb_left; |
a52458b4 | 416 | else if (cmp > 0) |
9f958ab8 TM |
417 | p = &parent->rb_right; |
418 | else { | |
0aaaf5c4 CL |
419 | if (!list_empty(&sp->so_lru)) |
420 | list_del_init(&sp->so_lru); | |
9f958ab8 | 421 | atomic_inc(&sp->so_count); |
414adf14 | 422 | return sp; |
9f958ab8 | 423 | } |
1da177e4 | 424 | } |
414adf14 | 425 | return NULL; |
1da177e4 LT |
426 | } |
427 | ||
9f958ab8 | 428 | static struct nfs4_state_owner * |
24d292b8 | 429 | nfs4_insert_state_owner_locked(struct nfs4_state_owner *new) |
9f958ab8 | 430 | { |
24d292b8 CL |
431 | struct nfs_server *server = new->so_server; |
432 | struct rb_node **p = &server->state_owners.rb_node, | |
9f958ab8 TM |
433 | *parent = NULL; |
434 | struct nfs4_state_owner *sp; | |
a52458b4 | 435 | int cmp; |
9f958ab8 TM |
436 | |
437 | while (*p != NULL) { | |
438 | parent = *p; | |
24d292b8 | 439 | sp = rb_entry(parent, struct nfs4_state_owner, so_server_node); |
a52458b4 | 440 | cmp = cred_fscmp(new->so_cred, sp->so_cred); |
9f958ab8 | 441 | |
a52458b4 | 442 | if (cmp < 0) |
9f958ab8 | 443 | p = &parent->rb_left; |
a52458b4 | 444 | else if (cmp > 0) |
9f958ab8 TM |
445 | p = &parent->rb_right; |
446 | else { | |
0aaaf5c4 CL |
447 | if (!list_empty(&sp->so_lru)) |
448 | list_del_init(&sp->so_lru); | |
9f958ab8 TM |
449 | atomic_inc(&sp->so_count); |
450 | return sp; | |
451 | } | |
452 | } | |
24d292b8 CL |
453 | rb_link_node(&new->so_server_node, parent, p); |
454 | rb_insert_color(&new->so_server_node, &server->state_owners); | |
9f958ab8 TM |
455 | return new; |
456 | } | |
457 | ||
458 | static void | |
24d292b8 | 459 | nfs4_remove_state_owner_locked(struct nfs4_state_owner *sp) |
9f958ab8 | 460 | { |
24d292b8 CL |
461 | struct nfs_server *server = sp->so_server; |
462 | ||
463 | if (!RB_EMPTY_NODE(&sp->so_server_node)) | |
464 | rb_erase(&sp->so_server_node, &server->state_owners); | |
9f958ab8 TM |
465 | } |
466 | ||
7ba127ab TM |
467 | static void |
468 | nfs4_init_seqid_counter(struct nfs_seqid_counter *sc) | |
469 | { | |
95b72eb0 | 470 | sc->create_time = ktime_get(); |
7ba127ab TM |
471 | sc->flags = 0; |
472 | sc->counter = 0; | |
473 | spin_lock_init(&sc->lock); | |
474 | INIT_LIST_HEAD(&sc->list); | |
475 | rpc_init_wait_queue(&sc->wait, "Seqid_waitqueue"); | |
476 | } | |
477 | ||
478 | static void | |
479 | nfs4_destroy_seqid_counter(struct nfs_seqid_counter *sc) | |
480 | { | |
481 | rpc_destroy_wait_queue(&sc->wait); | |
482 | } | |
483 | ||
1da177e4 LT |
484 | /* |
485 | * nfs4_alloc_state_owner(): this is called on the OPEN or CREATE path to | |
486 | * create a new state_owner. | |
487 | * | |
488 | */ | |
489 | static struct nfs4_state_owner * | |
d1e284d5 | 490 | nfs4_alloc_state_owner(struct nfs_server *server, |
a52458b4 | 491 | const struct cred *cred, |
d1e284d5 | 492 | gfp_t gfp_flags) |
1da177e4 LT |
493 | { |
494 | struct nfs4_state_owner *sp; | |
495 | ||
d1e284d5 | 496 | sp = kzalloc(sizeof(*sp), gfp_flags); |
1da177e4 LT |
497 | if (!sp) |
498 | return NULL; | |
aae5730e MW |
499 | sp->so_seqid.owner_id = ida_simple_get(&server->openowner_id, 0, 0, |
500 | gfp_flags); | |
501 | if (sp->so_seqid.owner_id < 0) { | |
502 | kfree(sp); | |
503 | return NULL; | |
504 | } | |
d1e284d5 | 505 | sp->so_server = server; |
a52458b4 | 506 | sp->so_cred = get_cred(cred); |
ec073428 | 507 | spin_lock_init(&sp->so_lock); |
1da177e4 | 508 | INIT_LIST_HEAD(&sp->so_states); |
7ba127ab | 509 | nfs4_init_seqid_counter(&sp->so_seqid); |
1da177e4 | 510 | atomic_set(&sp->so_count, 1); |
0aaaf5c4 | 511 | INIT_LIST_HEAD(&sp->so_lru); |
c137afab | 512 | seqcount_init(&sp->so_reclaim_seqcount); |
65b62a29 | 513 | mutex_init(&sp->so_delegreturn_mutex); |
1da177e4 LT |
514 | return sp; |
515 | } | |
516 | ||
1d2e88e7 | 517 | static void |
86cfb041 | 518 | nfs4_reset_state_owner(struct nfs4_state_owner *sp) |
1da177e4 | 519 | { |
86cfb041 N |
520 | /* This state_owner is no longer usable, but must |
521 | * remain in place so that state recovery can find it | |
522 | * and the opens associated with it. | |
523 | * It may also be used for new 'open' request to | |
524 | * return a delegation to the server. | |
525 | * So update the 'create_time' so that it looks like | |
526 | * a new state_owner. This will cause the server to | |
527 | * request an OPEN_CONFIRM to start a new sequence. | |
528 | */ | |
529 | sp->so_seqid.create_time = ktime_get(); | |
1da177e4 LT |
530 | } |
531 | ||
0aaaf5c4 CL |
532 | static void nfs4_free_state_owner(struct nfs4_state_owner *sp) |
533 | { | |
7ba127ab | 534 | nfs4_destroy_seqid_counter(&sp->so_seqid); |
a52458b4 | 535 | put_cred(sp->so_cred); |
aae5730e | 536 | ida_simple_remove(&sp->so_server->openowner_id, sp->so_seqid.owner_id); |
0aaaf5c4 CL |
537 | kfree(sp); |
538 | } | |
539 | ||
540 | static void nfs4_gc_state_owners(struct nfs_server *server) | |
541 | { | |
542 | struct nfs_client *clp = server->nfs_client; | |
543 | struct nfs4_state_owner *sp, *tmp; | |
544 | unsigned long time_min, time_max; | |
545 | LIST_HEAD(doomed); | |
546 | ||
547 | spin_lock(&clp->cl_lock); | |
548 | time_max = jiffies; | |
549 | time_min = (long)time_max - (long)clp->cl_lease_time; | |
550 | list_for_each_entry_safe(sp, tmp, &server->state_owners_lru, so_lru) { | |
551 | /* NB: LRU is sorted so that oldest is at the head */ | |
552 | if (time_in_range(sp->so_expires, time_min, time_max)) | |
553 | break; | |
554 | list_move(&sp->so_lru, &doomed); | |
555 | nfs4_remove_state_owner_locked(sp); | |
556 | } | |
557 | spin_unlock(&clp->cl_lock); | |
558 | ||
559 | list_for_each_entry_safe(sp, tmp, &doomed, so_lru) { | |
560 | list_del(&sp->so_lru); | |
561 | nfs4_free_state_owner(sp); | |
562 | } | |
563 | } | |
564 | ||
24d292b8 CL |
565 | /** |
566 | * nfs4_get_state_owner - Look up a state owner given a credential | |
567 | * @server: nfs_server to search | |
568 | * @cred: RPC credential to match | |
302fad7b | 569 | * @gfp_flags: allocation mode |
24d292b8 CL |
570 | * |
571 | * Returns a pointer to an instantiated nfs4_state_owner struct, or NULL. | |
572 | */ | |
573 | struct nfs4_state_owner *nfs4_get_state_owner(struct nfs_server *server, | |
a52458b4 | 574 | const struct cred *cred, |
d1e284d5 | 575 | gfp_t gfp_flags) |
1da177e4 | 576 | { |
7539bbab | 577 | struct nfs_client *clp = server->nfs_client; |
1da177e4 LT |
578 | struct nfs4_state_owner *sp, *new; |
579 | ||
1da177e4 | 580 | spin_lock(&clp->cl_lock); |
24d292b8 | 581 | sp = nfs4_find_state_owner_locked(server, cred); |
1da177e4 | 582 | spin_unlock(&clp->cl_lock); |
1da177e4 | 583 | if (sp != NULL) |
0aaaf5c4 | 584 | goto out; |
d1e284d5 | 585 | new = nfs4_alloc_state_owner(server, cred, gfp_flags); |
9f958ab8 | 586 | if (new == NULL) |
0aaaf5c4 | 587 | goto out; |
aae5730e MW |
588 | spin_lock(&clp->cl_lock); |
589 | sp = nfs4_insert_state_owner_locked(new); | |
590 | spin_unlock(&clp->cl_lock); | |
d1e284d5 TM |
591 | if (sp != new) |
592 | nfs4_free_state_owner(new); | |
0aaaf5c4 CL |
593 | out: |
594 | nfs4_gc_state_owners(server); | |
9f958ab8 | 595 | return sp; |
1da177e4 LT |
596 | } |
597 | ||
24d292b8 CL |
598 | /** |
599 | * nfs4_put_state_owner - Release a nfs4_state_owner | |
600 | * @sp: state owner data to release | |
7bf97bc2 TM |
601 | * |
602 | * Note that we keep released state owners on an LRU | |
603 | * list. | |
604 | * This caches valid state owners so that they can be | |
605 | * reused, to avoid the OPEN_CONFIRM on minor version 0. | |
606 | * It also pins the uniquifier of dropped state owners for | |
607 | * a while, to ensure that those state owner names are | |
608 | * never reused. | |
24d292b8 | 609 | */ |
1da177e4 LT |
610 | void nfs4_put_state_owner(struct nfs4_state_owner *sp) |
611 | { | |
0aaaf5c4 CL |
612 | struct nfs_server *server = sp->so_server; |
613 | struct nfs_client *clp = server->nfs_client; | |
1da177e4 LT |
614 | |
615 | if (!atomic_dec_and_lock(&sp->so_count, &clp->cl_lock)) | |
616 | return; | |
0aaaf5c4 | 617 | |
7bf97bc2 TM |
618 | sp->so_expires = jiffies; |
619 | list_add_tail(&sp->so_lru, &server->state_owners_lru); | |
620 | spin_unlock(&clp->cl_lock); | |
0aaaf5c4 CL |
621 | } |
622 | ||
623 | /** | |
624 | * nfs4_purge_state_owners - Release all cached state owners | |
625 | * @server: nfs_server with cached state owners to release | |
c77e2283 | 626 | * @head: resulting list of state owners |
0aaaf5c4 CL |
627 | * |
628 | * Called at umount time. Remaining state owners will be on | |
629 | * the LRU with ref count of zero. | |
c77e2283 TM |
630 | * Note that the state owners are not freed, but are added |
631 | * to the list @head, which can later be used as an argument | |
632 | * to nfs4_free_state_owners. | |
0aaaf5c4 | 633 | */ |
c77e2283 | 634 | void nfs4_purge_state_owners(struct nfs_server *server, struct list_head *head) |
0aaaf5c4 CL |
635 | { |
636 | struct nfs_client *clp = server->nfs_client; | |
637 | struct nfs4_state_owner *sp, *tmp; | |
0aaaf5c4 CL |
638 | |
639 | spin_lock(&clp->cl_lock); | |
640 | list_for_each_entry_safe(sp, tmp, &server->state_owners_lru, so_lru) { | |
c77e2283 | 641 | list_move(&sp->so_lru, head); |
0aaaf5c4 CL |
642 | nfs4_remove_state_owner_locked(sp); |
643 | } | |
1da177e4 | 644 | spin_unlock(&clp->cl_lock); |
c77e2283 | 645 | } |
0aaaf5c4 | 646 | |
c77e2283 TM |
647 | /** |
648 | * nfs4_purge_state_owners - Release all cached state owners | |
649 | * @head: resulting list of state owners | |
650 | * | |
651 | * Frees a list of state owners that was generated by | |
652 | * nfs4_purge_state_owners | |
653 | */ | |
654 | void nfs4_free_state_owners(struct list_head *head) | |
655 | { | |
656 | struct nfs4_state_owner *sp, *tmp; | |
657 | ||
658 | list_for_each_entry_safe(sp, tmp, head, so_lru) { | |
0aaaf5c4 CL |
659 | list_del(&sp->so_lru); |
660 | nfs4_free_state_owner(sp); | |
661 | } | |
1da177e4 LT |
662 | } |
663 | ||
664 | static struct nfs4_state * | |
665 | nfs4_alloc_open_state(void) | |
666 | { | |
667 | struct nfs4_state *state; | |
668 | ||
8535b2be | 669 | state = kzalloc(sizeof(*state), GFP_NOFS); |
1da177e4 LT |
670 | if (!state) |
671 | return NULL; | |
ace9fad4 | 672 | refcount_set(&state->count, 1); |
1da177e4 | 673 | INIT_LIST_HEAD(&state->lock_states); |
8d0a8a9d | 674 | spin_lock_init(&state->state_lock); |
8bda4e4c | 675 | seqlock_init(&state->seqlock); |
c9399f21 | 676 | init_waitqueue_head(&state->waitq); |
1da177e4 LT |
677 | return state; |
678 | } | |
679 | ||
4cecb76f | 680 | void |
dc0b027d | 681 | nfs4_state_set_mode_locked(struct nfs4_state *state, fmode_t fmode) |
4cecb76f | 682 | { |
dc0b027d | 683 | if (state->state == fmode) |
4cecb76f TM |
684 | return; |
685 | /* NB! List reordering - see the reclaim code for why. */ | |
dc0b027d TM |
686 | if ((fmode & FMODE_WRITE) != (state->state & FMODE_WRITE)) { |
687 | if (fmode & FMODE_WRITE) | |
4cecb76f TM |
688 | list_move(&state->open_states, &state->owner->so_states); |
689 | else | |
690 | list_move_tail(&state->open_states, &state->owner->so_states); | |
691 | } | |
dc0b027d | 692 | state->state = fmode; |
4cecb76f TM |
693 | } |
694 | ||
1da177e4 LT |
695 | static struct nfs4_state * |
696 | __nfs4_find_state_byowner(struct inode *inode, struct nfs4_state_owner *owner) | |
697 | { | |
698 | struct nfs_inode *nfsi = NFS_I(inode); | |
699 | struct nfs4_state *state; | |
700 | ||
9ae075fd | 701 | list_for_each_entry_rcu(state, &nfsi->open_states, inode_states) { |
1c816efa | 702 | if (state->owner != owner) |
1da177e4 | 703 | continue; |
5d422301 TM |
704 | if (!nfs4_valid_open_stateid(state)) |
705 | continue; | |
ace9fad4 | 706 | if (refcount_inc_not_zero(&state->count)) |
1da177e4 | 707 | return state; |
1da177e4 LT |
708 | } |
709 | return NULL; | |
710 | } | |
711 | ||
1da177e4 LT |
712 | static void |
713 | nfs4_free_open_state(struct nfs4_state *state) | |
714 | { | |
9ae075fd | 715 | kfree_rcu(state, rcu_head); |
1da177e4 LT |
716 | } |
717 | ||
718 | struct nfs4_state * | |
719 | nfs4_get_open_state(struct inode *inode, struct nfs4_state_owner *owner) | |
720 | { | |
721 | struct nfs4_state *state, *new; | |
722 | struct nfs_inode *nfsi = NFS_I(inode); | |
723 | ||
9ae075fd | 724 | rcu_read_lock(); |
1da177e4 | 725 | state = __nfs4_find_state_byowner(inode, owner); |
9ae075fd | 726 | rcu_read_unlock(); |
1da177e4 LT |
727 | if (state) |
728 | goto out; | |
729 | new = nfs4_alloc_open_state(); | |
ec073428 | 730 | spin_lock(&owner->so_lock); |
1da177e4 LT |
731 | spin_lock(&inode->i_lock); |
732 | state = __nfs4_find_state_byowner(inode, owner); | |
733 | if (state == NULL && new != NULL) { | |
734 | state = new; | |
1da177e4 LT |
735 | state->owner = owner; |
736 | atomic_inc(&owner->so_count); | |
0444d76a DC |
737 | ihold(inode); |
738 | state->inode = inode; | |
29fe8399 | 739 | list_add_rcu(&state->inode_states, &nfsi->open_states); |
1da177e4 | 740 | spin_unlock(&inode->i_lock); |
ec073428 TM |
741 | /* Note: The reclaim code dictates that we add stateless |
742 | * and read-only stateids to the end of the list */ | |
743 | list_add_tail(&state->open_states, &owner->so_states); | |
744 | spin_unlock(&owner->so_lock); | |
1da177e4 LT |
745 | } else { |
746 | spin_unlock(&inode->i_lock); | |
ec073428 | 747 | spin_unlock(&owner->so_lock); |
1da177e4 LT |
748 | if (new) |
749 | nfs4_free_open_state(new); | |
750 | } | |
751 | out: | |
752 | return state; | |
753 | } | |
754 | ||
1da177e4 LT |
755 | void nfs4_put_open_state(struct nfs4_state *state) |
756 | { | |
757 | struct inode *inode = state->inode; | |
758 | struct nfs4_state_owner *owner = state->owner; | |
759 | ||
ace9fad4 | 760 | if (!refcount_dec_and_lock(&state->count, &owner->so_lock)) |
1da177e4 | 761 | return; |
ec073428 | 762 | spin_lock(&inode->i_lock); |
9ae075fd | 763 | list_del_rcu(&state->inode_states); |
1da177e4 | 764 | list_del(&state->open_states); |
ec073428 TM |
765 | spin_unlock(&inode->i_lock); |
766 | spin_unlock(&owner->so_lock); | |
b7b7dac6 | 767 | nfs4_inode_return_delegation_on_close(inode); |
1da177e4 | 768 | iput(inode); |
1da177e4 LT |
769 | nfs4_free_open_state(state); |
770 | nfs4_put_state_owner(owner); | |
771 | } | |
772 | ||
773 | /* | |
83c9d41e | 774 | * Close the current file. |
1da177e4 | 775 | */ |
643168c2 | 776 | static void __nfs4_close(struct nfs4_state *state, |
8535b2be | 777 | fmode_t fmode, gfp_t gfp_mask, int wait) |
1da177e4 | 778 | { |
1da177e4 | 779 | struct nfs4_state_owner *owner = state->owner; |
003707c7 | 780 | int call_close = 0; |
dc0b027d | 781 | fmode_t newstate; |
1da177e4 LT |
782 | |
783 | atomic_inc(&owner->so_count); | |
1da177e4 | 784 | /* Protect against nfs4_find_state() */ |
ec073428 | 785 | spin_lock(&owner->so_lock); |
dc0b027d | 786 | switch (fmode & (FMODE_READ | FMODE_WRITE)) { |
e7616923 TM |
787 | case FMODE_READ: |
788 | state->n_rdonly--; | |
789 | break; | |
790 | case FMODE_WRITE: | |
791 | state->n_wronly--; | |
792 | break; | |
793 | case FMODE_READ|FMODE_WRITE: | |
794 | state->n_rdwr--; | |
795 | } | |
003707c7 | 796 | newstate = FMODE_READ|FMODE_WRITE; |
e7616923 | 797 | if (state->n_rdwr == 0) { |
003707c7 | 798 | if (state->n_rdonly == 0) { |
e7616923 | 799 | newstate &= ~FMODE_READ; |
003707c7 TM |
800 | call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags); |
801 | call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); | |
802 | } | |
803 | if (state->n_wronly == 0) { | |
e7616923 | 804 | newstate &= ~FMODE_WRITE; |
003707c7 TM |
805 | call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags); |
806 | call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); | |
807 | } | |
808 | if (newstate == 0) | |
809 | clear_bit(NFS_DELEGATED_STATE, &state->flags); | |
e7616923 | 810 | } |
003707c7 | 811 | nfs4_state_set_mode_locked(state, newstate); |
ec073428 | 812 | spin_unlock(&owner->so_lock); |
4cecb76f | 813 | |
003707c7 | 814 | if (!call_close) { |
b39e625b TM |
815 | nfs4_put_open_state(state); |
816 | nfs4_put_state_owner(owner); | |
1f7977c1 TM |
817 | } else |
818 | nfs4_do_close(state, gfp_mask, wait); | |
a49c3c77 TM |
819 | } |
820 | ||
643168c2 | 821 | void nfs4_close_state(struct nfs4_state *state, fmode_t fmode) |
a49c3c77 | 822 | { |
643168c2 | 823 | __nfs4_close(state, fmode, GFP_NOFS, 0); |
a49c3c77 TM |
824 | } |
825 | ||
643168c2 | 826 | void nfs4_close_sync(struct nfs4_state *state, fmode_t fmode) |
a49c3c77 | 827 | { |
643168c2 | 828 | __nfs4_close(state, fmode, GFP_KERNEL, 1); |
1da177e4 LT |
829 | } |
830 | ||
831 | /* | |
832 | * Search the state->lock_states for an existing lock_owner | |
3f8f2548 N |
833 | * that is compatible with either of the given owners. |
834 | * If the second is non-zero, then the first refers to a Posix-lock | |
835 | * owner (current->files) and the second refers to a flock/OFD | |
836 | * owner (struct file*). In that case, prefer a match for the first | |
837 | * owner. | |
838 | * If both sorts of locks are held on the one file we cannot know | |
839 | * which stateid was intended to be used, so a "correct" choice cannot | |
840 | * be made. Failing that, a "consistent" choice is preferable. The | |
841 | * consistent choice we make is to prefer the first owner, that of a | |
842 | * Posix lock. | |
1da177e4 LT |
843 | */ |
844 | static struct nfs4_lock_state * | |
8d424431 N |
845 | __nfs4_find_lock_state(struct nfs4_state *state, |
846 | fl_owner_t fl_owner, fl_owner_t fl_owner2) | |
1da177e4 | 847 | { |
3f8f2548 | 848 | struct nfs4_lock_state *pos, *ret = NULL; |
1da177e4 | 849 | list_for_each_entry(pos, &state->lock_states, ls_locks) { |
3f8f2548 N |
850 | if (pos->ls_owner == fl_owner) { |
851 | ret = pos; | |
852 | break; | |
853 | } | |
854 | if (pos->ls_owner == fl_owner2) | |
855 | ret = pos; | |
1da177e4 | 856 | } |
3f8f2548 | 857 | if (ret) |
194bc1f4 | 858 | refcount_inc(&ret->ls_count); |
3f8f2548 | 859 | return ret; |
1da177e4 LT |
860 | } |
861 | ||
1da177e4 LT |
862 | /* |
863 | * Return a compatible lock_state. If no initialized lock_state structure | |
864 | * exists, return an uninitialized one. | |
865 | * | |
1da177e4 | 866 | */ |
8003d3c4 | 867 | static struct nfs4_lock_state *nfs4_alloc_lock_state(struct nfs4_state *state, fl_owner_t fl_owner) |
1da177e4 LT |
868 | { |
869 | struct nfs4_lock_state *lsp; | |
24d292b8 | 870 | struct nfs_server *server = state->owner->so_server; |
1da177e4 | 871 | |
8535b2be | 872 | lsp = kzalloc(sizeof(*lsp), GFP_NOFS); |
1da177e4 LT |
873 | if (lsp == NULL) |
874 | return NULL; | |
7ba127ab | 875 | nfs4_init_seqid_counter(&lsp->ls_seqid); |
194bc1f4 | 876 | refcount_set(&lsp->ls_count, 1); |
b64aec8d | 877 | lsp->ls_state = state; |
8003d3c4 | 878 | lsp->ls_owner = fl_owner; |
48c22eb2 TM |
879 | lsp->ls_seqid.owner_id = ida_simple_get(&server->lockowner_id, 0, 0, GFP_NOFS); |
880 | if (lsp->ls_seqid.owner_id < 0) | |
d2d7ce28 | 881 | goto out_free; |
8d0a8a9d | 882 | INIT_LIST_HEAD(&lsp->ls_locks); |
1da177e4 | 883 | return lsp; |
d2d7ce28 TM |
884 | out_free: |
885 | kfree(lsp); | |
886 | return NULL; | |
1da177e4 LT |
887 | } |
888 | ||
5ae67c4f | 889 | void nfs4_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp) |
9f958ab8 | 890 | { |
48c22eb2 | 891 | ida_simple_remove(&server->lockowner_id, lsp->ls_seqid.owner_id); |
7ba127ab | 892 | nfs4_destroy_seqid_counter(&lsp->ls_seqid); |
9f958ab8 TM |
893 | kfree(lsp); |
894 | } | |
895 | ||
1da177e4 LT |
896 | /* |
897 | * Return a compatible lock_state. If no initialized lock_state structure | |
898 | * exists, return an uninitialized one. | |
899 | * | |
1da177e4 | 900 | */ |
8003d3c4 | 901 | static struct nfs4_lock_state *nfs4_get_lock_state(struct nfs4_state *state, fl_owner_t owner) |
1da177e4 | 902 | { |
8d0a8a9d | 903 | struct nfs4_lock_state *lsp, *new = NULL; |
1da177e4 | 904 | |
8d0a8a9d TM |
905 | for(;;) { |
906 | spin_lock(&state->state_lock); | |
68e33bd6 | 907 | lsp = __nfs4_find_lock_state(state, owner, NULL); |
8d0a8a9d TM |
908 | if (lsp != NULL) |
909 | break; | |
910 | if (new != NULL) { | |
8d0a8a9d TM |
911 | list_add(&new->ls_locks, &state->lock_states); |
912 | set_bit(LK_STATE_IN_USE, &state->flags); | |
913 | lsp = new; | |
914 | new = NULL; | |
915 | break; | |
916 | } | |
917 | spin_unlock(&state->state_lock); | |
8003d3c4 | 918 | new = nfs4_alloc_lock_state(state, owner); |
8d0a8a9d TM |
919 | if (new == NULL) |
920 | return NULL; | |
921 | } | |
922 | spin_unlock(&state->state_lock); | |
9f958ab8 | 923 | if (new != NULL) |
5ae67c4f | 924 | nfs4_free_lock_state(state->owner->so_server, new); |
1da177e4 LT |
925 | return lsp; |
926 | } | |
927 | ||
928 | /* | |
8d0a8a9d TM |
929 | * Release reference to lock_state, and free it if we see that |
930 | * it is no longer in use | |
1da177e4 | 931 | */ |
faf5f49c | 932 | void nfs4_put_lock_state(struct nfs4_lock_state *lsp) |
1da177e4 | 933 | { |
c8b2d0bf | 934 | struct nfs_server *server; |
8d0a8a9d | 935 | struct nfs4_state *state; |
1da177e4 | 936 | |
8d0a8a9d TM |
937 | if (lsp == NULL) |
938 | return; | |
939 | state = lsp->ls_state; | |
194bc1f4 | 940 | if (!refcount_dec_and_lock(&lsp->ls_count, &state->state_lock)) |
8d0a8a9d TM |
941 | return; |
942 | list_del(&lsp->ls_locks); | |
943 | if (list_empty(&state->lock_states)) | |
944 | clear_bit(LK_STATE_IN_USE, &state->flags); | |
945 | spin_unlock(&state->state_lock); | |
0c0e0d3c JL |
946 | server = state->owner->so_server; |
947 | if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) { | |
948 | struct nfs_client *clp = server->nfs_client; | |
949 | ||
950 | clp->cl_mvops->free_lock_state(server, lsp); | |
951 | } else | |
c8b2d0bf | 952 | nfs4_free_lock_state(server, lsp); |
1da177e4 LT |
953 | } |
954 | ||
8d0a8a9d | 955 | static void nfs4_fl_copy_lock(struct file_lock *dst, struct file_lock *src) |
1da177e4 | 956 | { |
8d0a8a9d | 957 | struct nfs4_lock_state *lsp = src->fl_u.nfs4_fl.owner; |
1da177e4 | 958 | |
8d0a8a9d | 959 | dst->fl_u.nfs4_fl.owner = lsp; |
194bc1f4 | 960 | refcount_inc(&lsp->ls_count); |
8d0a8a9d | 961 | } |
1da177e4 | 962 | |
8d0a8a9d | 963 | static void nfs4_fl_release_lock(struct file_lock *fl) |
1da177e4 | 964 | { |
8d0a8a9d | 965 | nfs4_put_lock_state(fl->fl_u.nfs4_fl.owner); |
1da177e4 LT |
966 | } |
967 | ||
6aed6285 | 968 | static const struct file_lock_operations nfs4_fl_lock_ops = { |
8d0a8a9d TM |
969 | .fl_copy_lock = nfs4_fl_copy_lock, |
970 | .fl_release_private = nfs4_fl_release_lock, | |
971 | }; | |
972 | ||
973 | int nfs4_set_lock_state(struct nfs4_state *state, struct file_lock *fl) | |
1da177e4 | 974 | { |
8d0a8a9d TM |
975 | struct nfs4_lock_state *lsp; |
976 | ||
977 | if (fl->fl_ops != NULL) | |
978 | return 0; | |
8003d3c4 | 979 | lsp = nfs4_get_lock_state(state, fl->fl_owner); |
8d0a8a9d TM |
980 | if (lsp == NULL) |
981 | return -ENOMEM; | |
982 | fl->fl_u.nfs4_fl.owner = lsp; | |
983 | fl->fl_ops = &nfs4_fl_lock_ops; | |
984 | return 0; | |
1da177e4 LT |
985 | } |
986 | ||
5521abfd TM |
987 | static int nfs4_copy_lock_stateid(nfs4_stateid *dst, |
988 | struct nfs4_state *state, | |
17393475 | 989 | const struct nfs_lock_context *l_ctx) |
1da177e4 | 990 | { |
8d0a8a9d | 991 | struct nfs4_lock_state *lsp; |
8d424431 | 992 | fl_owner_t fl_owner, fl_flock_owner; |
5521abfd | 993 | int ret = -ENOENT; |
1da177e4 | 994 | |
17393475 | 995 | if (l_ctx == NULL) |
2a369153 TM |
996 | goto out; |
997 | ||
8d0a8a9d | 998 | if (test_bit(LK_STATE_IN_USE, &state->flags) == 0) |
4fc8796d | 999 | goto out; |
1da177e4 | 1000 | |
d51fdb87 | 1001 | fl_owner = l_ctx->lockowner; |
8d424431 N |
1002 | fl_flock_owner = l_ctx->open_context->flock_owner; |
1003 | ||
8d0a8a9d | 1004 | spin_lock(&state->state_lock); |
8d424431 | 1005 | lsp = __nfs4_find_lock_state(state, fl_owner, fl_flock_owner); |
ef1820f9 N |
1006 | if (lsp && test_bit(NFS_LOCK_LOST, &lsp->ls_flags)) |
1007 | ret = -EIO; | |
1008 | else if (lsp != NULL && test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0) { | |
f597c537 | 1009 | nfs4_stateid_copy(dst, &lsp->ls_stateid); |
5521abfd | 1010 | ret = 0; |
4fc8796d | 1011 | } |
8d0a8a9d | 1012 | spin_unlock(&state->state_lock); |
1da177e4 | 1013 | nfs4_put_lock_state(lsp); |
4fc8796d TM |
1014 | out: |
1015 | return ret; | |
1016 | } | |
1017 | ||
c82bac6f | 1018 | bool nfs4_copy_open_stateid(nfs4_stateid *dst, struct nfs4_state *state) |
4fc8796d | 1019 | { |
c82bac6f | 1020 | bool ret; |
92b40e93 | 1021 | const nfs4_stateid *src; |
4fc8796d TM |
1022 | int seq; |
1023 | ||
1024 | do { | |
c82bac6f | 1025 | ret = false; |
92b40e93 | 1026 | src = &zero_stateid; |
4fc8796d | 1027 | seq = read_seqbegin(&state->seqlock); |
c82bac6f | 1028 | if (test_bit(NFS_OPEN_STATE, &state->flags)) { |
92b40e93 | 1029 | src = &state->open_stateid; |
c82bac6f TM |
1030 | ret = true; |
1031 | } | |
92b40e93 | 1032 | nfs4_stateid_copy(dst, src); |
4fc8796d | 1033 | } while (read_seqretry(&state->seqlock, seq)); |
c82bac6f | 1034 | return ret; |
4fc8796d TM |
1035 | } |
1036 | ||
1037 | /* | |
1038 | * Byte-range lock aware utility to initialize the stateid of read/write | |
1039 | * requests. | |
1040 | */ | |
abf4e13c | 1041 | int nfs4_select_rw_stateid(struct nfs4_state *state, |
17393475 | 1042 | fmode_t fmode, const struct nfs_lock_context *l_ctx, |
a52458b4 | 1043 | nfs4_stateid *dst, const struct cred **cred) |
4fc8796d | 1044 | { |
abf4e13c TM |
1045 | int ret; |
1046 | ||
7ebeb7fe TM |
1047 | if (!nfs4_valid_open_stateid(state)) |
1048 | return -EIO; | |
abf4e13c TM |
1049 | if (cred != NULL) |
1050 | *cred = NULL; | |
17393475 | 1051 | ret = nfs4_copy_lock_stateid(dst, state, l_ctx); |
ef1820f9 N |
1052 | if (ret == -EIO) |
1053 | /* A lost lock - don't even consider delegations */ | |
1054 | goto out; | |
146d70ca | 1055 | /* returns true if delegation stateid found and copied */ |
abf4e13c | 1056 | if (nfs4_copy_delegation_stateid(state->inode, fmode, dst, cred)) { |
146d70ca | 1057 | ret = 0; |
5521abfd | 1058 | goto out; |
146d70ca | 1059 | } |
5521abfd | 1060 | if (ret != -ENOENT) |
ef1820f9 N |
1061 | /* nfs4_copy_delegation_stateid() didn't over-write |
1062 | * dst, so it still has the lock stateid which we now | |
1063 | * choose to use. | |
1064 | */ | |
5521abfd | 1065 | goto out; |
d9aba2b4 | 1066 | ret = nfs4_copy_open_stateid(dst, state) ? 0 : -EAGAIN; |
5521abfd | 1067 | out: |
3b66486c TM |
1068 | if (nfs_server_capable(state->inode, NFS_CAP_STATEID_NFSV41)) |
1069 | dst->seqid = 0; | |
5521abfd | 1070 | return ret; |
1da177e4 LT |
1071 | } |
1072 | ||
8535b2be | 1073 | struct nfs_seqid *nfs_alloc_seqid(struct nfs_seqid_counter *counter, gfp_t gfp_mask) |
cee54fc9 | 1074 | { |
cee54fc9 TM |
1075 | struct nfs_seqid *new; |
1076 | ||
8535b2be | 1077 | new = kmalloc(sizeof(*new), gfp_mask); |
badc76dd TM |
1078 | if (new == NULL) |
1079 | return ERR_PTR(-ENOMEM); | |
1080 | new->sequence = counter; | |
1081 | INIT_LIST_HEAD(&new->list); | |
1082 | new->task = NULL; | |
cee54fc9 TM |
1083 | return new; |
1084 | } | |
1085 | ||
72211dbe | 1086 | void nfs_release_seqid(struct nfs_seqid *seqid) |
1da177e4 | 1087 | { |
4601df20 | 1088 | struct nfs_seqid_counter *sequence; |
cee54fc9 | 1089 | |
a6796419 | 1090 | if (seqid == NULL || list_empty(&seqid->list)) |
4601df20 TM |
1091 | return; |
1092 | sequence = seqid->sequence; | |
1093 | spin_lock(&sequence->lock); | |
1094 | list_del_init(&seqid->list); | |
1095 | if (!list_empty(&sequence->list)) { | |
1096 | struct nfs_seqid *next; | |
1097 | ||
1098 | next = list_first_entry(&sequence->list, | |
1099 | struct nfs_seqid, list); | |
1100 | rpc_wake_up_queued_task(&sequence->wait, next->task); | |
2f74c0a0 | 1101 | } |
4601df20 | 1102 | spin_unlock(&sequence->lock); |
72211dbe TM |
1103 | } |
1104 | ||
1105 | void nfs_free_seqid(struct nfs_seqid *seqid) | |
1106 | { | |
1107 | nfs_release_seqid(seqid); | |
cee54fc9 | 1108 | kfree(seqid); |
1da177e4 LT |
1109 | } |
1110 | ||
1111 | /* | |
cee54fc9 TM |
1112 | * Increment the seqid if the OPEN/OPEN_DOWNGRADE/CLOSE succeeded, or |
1113 | * failed with a seqid incrementing error - | |
16a6ddc7 | 1114 | * see comments nfs4.h:seqid_mutating_error() |
cee54fc9 | 1115 | */ |
88d90939 | 1116 | static void nfs_increment_seqid(int status, struct nfs_seqid *seqid) |
cee54fc9 TM |
1117 | { |
1118 | switch (status) { | |
1119 | case 0: | |
1120 | break; | |
1121 | case -NFS4ERR_BAD_SEQID: | |
6f43ddcc TM |
1122 | if (seqid->sequence->flags & NFS_SEQID_CONFIRMED) |
1123 | return; | |
9a3ba432 | 1124 | pr_warn_ratelimited("NFS: v4 server returned a bad" |
497799e7 DM |
1125 | " sequence-id error on an" |
1126 | " unconfirmed sequence %p!\n", | |
6f43ddcc | 1127 | seqid->sequence); |
cee54fc9 TM |
1128 | case -NFS4ERR_STALE_CLIENTID: |
1129 | case -NFS4ERR_STALE_STATEID: | |
1130 | case -NFS4ERR_BAD_STATEID: | |
1131 | case -NFS4ERR_BADXDR: | |
1132 | case -NFS4ERR_RESOURCE: | |
1133 | case -NFS4ERR_NOFILEHANDLE: | |
406dab84 | 1134 | case -NFS4ERR_MOVED: |
cee54fc9 TM |
1135 | /* Non-seqid mutating errors */ |
1136 | return; | |
8b98a532 | 1137 | } |
cee54fc9 TM |
1138 | /* |
1139 | * Note: no locking needed as we are guaranteed to be first | |
1140 | * on the sequence list | |
1141 | */ | |
1142 | seqid->sequence->counter++; | |
1143 | } | |
1144 | ||
1145 | void nfs_increment_open_seqid(int status, struct nfs_seqid *seqid) | |
1146 | { | |
a6796419 TM |
1147 | struct nfs4_state_owner *sp; |
1148 | ||
1149 | if (seqid == NULL) | |
1150 | return; | |
34dc1ad7 | 1151 | |
a6796419 | 1152 | sp = container_of(seqid->sequence, struct nfs4_state_owner, so_seqid); |
34dc1ad7 | 1153 | if (status == -NFS4ERR_BAD_SEQID) |
86cfb041 | 1154 | nfs4_reset_state_owner(sp); |
a6796419 | 1155 | if (!nfs4_has_session(sp->so_server->nfs_client)) |
34dc1ad7 | 1156 | nfs_increment_seqid(status, seqid); |
cee54fc9 TM |
1157 | } |
1158 | ||
1159 | /* | |
cee54fc9 TM |
1160 | * Increment the seqid if the LOCK/LOCKU succeeded, or |
1161 | * failed with a seqid incrementing error - | |
16a6ddc7 | 1162 | * see comments nfs4.h:seqid_mutating_error() |
cee54fc9 TM |
1163 | */ |
1164 | void nfs_increment_lock_seqid(int status, struct nfs_seqid *seqid) | |
1165 | { | |
a6796419 TM |
1166 | if (seqid != NULL) |
1167 | nfs_increment_seqid(status, seqid); | |
cee54fc9 TM |
1168 | } |
1169 | ||
1170 | int nfs_wait_on_sequence(struct nfs_seqid *seqid, struct rpc_task *task) | |
1171 | { | |
a6796419 | 1172 | struct nfs_seqid_counter *sequence; |
cee54fc9 TM |
1173 | int status = 0; |
1174 | ||
a6796419 TM |
1175 | if (seqid == NULL) |
1176 | goto out; | |
1177 | sequence = seqid->sequence; | |
cee54fc9 | 1178 | spin_lock(&sequence->lock); |
4601df20 | 1179 | seqid->task = task; |
2f74c0a0 TM |
1180 | if (list_empty(&seqid->list)) |
1181 | list_add_tail(&seqid->list, &sequence->list); | |
1182 | if (list_first_entry(&sequence->list, struct nfs_seqid, list) == seqid) | |
1183 | goto unlock; | |
5d00837b | 1184 | rpc_sleep_on(&sequence->wait, task, NULL); |
2f74c0a0 TM |
1185 | status = -EAGAIN; |
1186 | unlock: | |
cee54fc9 | 1187 | spin_unlock(&sequence->lock); |
a6796419 | 1188 | out: |
cee54fc9 | 1189 | return status; |
1da177e4 LT |
1190 | } |
1191 | ||
e005e804 | 1192 | static int nfs4_run_state_manager(void *); |
1da177e4 | 1193 | |
e005e804 | 1194 | static void nfs4_clear_state_manager_bit(struct nfs_client *clp) |
433fbe4c | 1195 | { |
4e857c58 | 1196 | smp_mb__before_atomic(); |
e005e804 | 1197 | clear_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state); |
4e857c58 | 1198 | smp_mb__after_atomic(); |
e005e804 | 1199 | wake_up_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING); |
433fbe4c TM |
1200 | rpc_wake_up(&clp->cl_rpcwaitq); |
1201 | } | |
1202 | ||
1da177e4 | 1203 | /* |
e005e804 | 1204 | * Schedule the nfs_client asynchronous state management routine |
1da177e4 | 1205 | */ |
b0d3ded1 | 1206 | void nfs4_schedule_state_manager(struct nfs_client *clp) |
1da177e4 | 1207 | { |
5043e900 | 1208 | struct task_struct *task; |
2446ab60 | 1209 | char buf[INET6_ADDRSTRLEN + sizeof("-manager") + 1]; |
1da177e4 | 1210 | |
aeabb3c9 | 1211 | set_bit(NFS4CLNT_RUN_MANAGER, &clp->cl_state); |
e005e804 TM |
1212 | if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) != 0) |
1213 | return; | |
5043e900 | 1214 | __module_get(THIS_MODULE); |
212bf41d | 1215 | refcount_inc(&clp->cl_count); |
2446ab60 TM |
1216 | |
1217 | /* The rcu_read_lock() is not strictly necessary, as the state | |
1218 | * manager is the only thread that ever changes the rpc_xprt | |
1219 | * after it's initialized. At this point, we're single threaded. */ | |
1220 | rcu_read_lock(); | |
1221 | snprintf(buf, sizeof(buf), "%s-manager", | |
1222 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)); | |
1223 | rcu_read_unlock(); | |
f170168b | 1224 | task = kthread_run(nfs4_run_state_manager, clp, "%s", buf); |
2446ab60 TM |
1225 | if (IS_ERR(task)) { |
1226 | printk(KERN_ERR "%s: kthread_run: %ld\n", | |
1227 | __func__, PTR_ERR(task)); | |
1228 | nfs4_clear_state_manager_bit(clp); | |
1229 | nfs_put_client(clp); | |
1230 | module_put(THIS_MODULE); | |
1231 | } | |
1da177e4 LT |
1232 | } |
1233 | ||
1234 | /* | |
0400a6b0 | 1235 | * Schedule a lease recovery attempt |
1da177e4 | 1236 | */ |
0400a6b0 | 1237 | void nfs4_schedule_lease_recovery(struct nfs_client *clp) |
1da177e4 LT |
1238 | { |
1239 | if (!clp) | |
1240 | return; | |
e598d843 TM |
1241 | if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
1242 | set_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); | |
cc0a9843 TM |
1243 | dprintk("%s: scheduling lease recovery for server %s\n", __func__, |
1244 | clp->cl_hostname); | |
e005e804 | 1245 | nfs4_schedule_state_manager(clp); |
1da177e4 | 1246 | } |
9cb81968 | 1247 | EXPORT_SYMBOL_GPL(nfs4_schedule_lease_recovery); |
1da177e4 | 1248 | |
c9fdeb28 CL |
1249 | /** |
1250 | * nfs4_schedule_migration_recovery - trigger migration recovery | |
1251 | * | |
1252 | * @server: FSID that is migrating | |
1253 | * | |
1254 | * Returns zero if recovery has started, otherwise a negative NFS4ERR | |
1255 | * value is returned. | |
1256 | */ | |
1257 | int nfs4_schedule_migration_recovery(const struct nfs_server *server) | |
1258 | { | |
1259 | struct nfs_client *clp = server->nfs_client; | |
1260 | ||
1261 | if (server->fh_expire_type != NFS4_FH_PERSISTENT) { | |
1262 | pr_err("NFS: volatile file handles not supported (server %s)\n", | |
1263 | clp->cl_hostname); | |
1264 | return -NFS4ERR_IO; | |
1265 | } | |
1266 | ||
1267 | if (test_bit(NFS_MIG_FAILED, &server->mig_status)) | |
1268 | return -NFS4ERR_IO; | |
1269 | ||
1270 | dprintk("%s: scheduling migration recovery for (%llx:%llx) on %s\n", | |
1271 | __func__, | |
1272 | (unsigned long long)server->fsid.major, | |
1273 | (unsigned long long)server->fsid.minor, | |
1274 | clp->cl_hostname); | |
1275 | ||
1276 | set_bit(NFS_MIG_IN_TRANSITION, | |
1277 | &((struct nfs_server *)server)->mig_status); | |
1278 | set_bit(NFS4CLNT_MOVED, &clp->cl_state); | |
1279 | ||
1280 | nfs4_schedule_state_manager(clp); | |
1281 | return 0; | |
1282 | } | |
1283 | EXPORT_SYMBOL_GPL(nfs4_schedule_migration_recovery); | |
1284 | ||
b7f7a66e CL |
1285 | /** |
1286 | * nfs4_schedule_lease_moved_recovery - start lease-moved recovery | |
1287 | * | |
1288 | * @clp: server to check for moved leases | |
1289 | * | |
1290 | */ | |
1291 | void nfs4_schedule_lease_moved_recovery(struct nfs_client *clp) | |
1292 | { | |
1293 | dprintk("%s: scheduling lease-moved recovery for client ID %llx on %s\n", | |
1294 | __func__, clp->cl_clientid, clp->cl_hostname); | |
1295 | ||
1296 | set_bit(NFS4CLNT_LEASE_MOVED, &clp->cl_state); | |
1297 | nfs4_schedule_state_manager(clp); | |
1298 | } | |
1299 | EXPORT_SYMBOL_GPL(nfs4_schedule_lease_moved_recovery); | |
1300 | ||
33021279 TM |
1301 | int nfs4_wait_clnt_recover(struct nfs_client *clp) |
1302 | { | |
1303 | int res; | |
1304 | ||
1305 | might_sleep(); | |
1306 | ||
212bf41d | 1307 | refcount_inc(&clp->cl_count); |
74316201 N |
1308 | res = wait_on_bit_action(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING, |
1309 | nfs_wait_bit_killable, TASK_KILLABLE); | |
33021279 | 1310 | if (res) |
0625c2dd | 1311 | goto out; |
33021279 | 1312 | if (clp->cl_cons_state < 0) |
0625c2dd CL |
1313 | res = clp->cl_cons_state; |
1314 | out: | |
1315 | nfs_put_client(clp); | |
1316 | return res; | |
33021279 TM |
1317 | } |
1318 | ||
1319 | int nfs4_client_recover_expired_lease(struct nfs_client *clp) | |
1320 | { | |
1321 | unsigned int loop; | |
1322 | int ret; | |
1323 | ||
1324 | for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) { | |
1325 | ret = nfs4_wait_clnt_recover(clp); | |
1326 | if (ret != 0) | |
1327 | break; | |
1328 | if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) && | |
1329 | !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state)) | |
1330 | break; | |
1331 | nfs4_schedule_state_manager(clp); | |
1332 | ret = -EIO; | |
1333 | } | |
1334 | return ret; | |
1335 | } | |
1336 | ||
ad1e3968 TM |
1337 | /* |
1338 | * nfs40_handle_cb_pathdown - return all delegations after NFS4ERR_CB_PATH_DOWN | |
1339 | * @clp: client to process | |
1340 | * | |
1341 | * Set the NFS4CLNT_LEASE_EXPIRED state in order to force a | |
1342 | * resend of the SETCLIENTID and hence re-establish the | |
1343 | * callback channel. Then return all existing delegations. | |
1344 | */ | |
1345 | static void nfs40_handle_cb_pathdown(struct nfs_client *clp) | |
1346 | { | |
1347 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1348 | nfs_expire_all_delegations(clp); | |
cc0a9843 TM |
1349 | dprintk("%s: handling CB_PATHDOWN recovery for server %s\n", __func__, |
1350 | clp->cl_hostname); | |
ad1e3968 TM |
1351 | } |
1352 | ||
042b60be TM |
1353 | void nfs4_schedule_path_down_recovery(struct nfs_client *clp) |
1354 | { | |
ad1e3968 | 1355 | nfs40_handle_cb_pathdown(clp); |
042b60be TM |
1356 | nfs4_schedule_state_manager(clp); |
1357 | } | |
1358 | ||
f9feab1e | 1359 | static int nfs4_state_mark_reclaim_reboot(struct nfs_client *clp, struct nfs4_state *state) |
b79a4a1b TM |
1360 | { |
1361 | ||
7ebeb7fe TM |
1362 | if (!nfs4_valid_open_stateid(state)) |
1363 | return 0; | |
b79a4a1b TM |
1364 | set_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); |
1365 | /* Don't recover state that expired before the reboot */ | |
1366 | if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) { | |
1367 | clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); | |
1368 | return 0; | |
1369 | } | |
7eff03ae | 1370 | set_bit(NFS_OWNER_RECLAIM_REBOOT, &state->owner->so_flags); |
b79a4a1b TM |
1371 | set_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state); |
1372 | return 1; | |
1373 | } | |
1374 | ||
4f14c194 | 1375 | int nfs4_state_mark_reclaim_nograce(struct nfs_client *clp, struct nfs4_state *state) |
b79a4a1b | 1376 | { |
7ebeb7fe TM |
1377 | if (!nfs4_valid_open_stateid(state)) |
1378 | return 0; | |
b79a4a1b TM |
1379 | set_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags); |
1380 | clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); | |
7eff03ae | 1381 | set_bit(NFS_OWNER_RECLAIM_NOGRACE, &state->owner->so_flags); |
b79a4a1b TM |
1382 | set_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state); |
1383 | return 1; | |
1384 | } | |
1385 | ||
5d422301 | 1386 | int nfs4_schedule_stateid_recovery(const struct nfs_server *server, struct nfs4_state *state) |
0400a6b0 TM |
1387 | { |
1388 | struct nfs_client *clp = server->nfs_client; | |
1389 | ||
7ebeb7fe | 1390 | if (!nfs4_state_mark_reclaim_nograce(clp, state)) |
5d422301 | 1391 | return -EBADF; |
994b15b9 TM |
1392 | nfs_inode_find_delegation_state_and_recover(state->inode, |
1393 | &state->stateid); | |
cc0a9843 TM |
1394 | dprintk("%s: scheduling stateid recovery for server %s\n", __func__, |
1395 | clp->cl_hostname); | |
0400a6b0 | 1396 | nfs4_schedule_state_manager(clp); |
5d422301 | 1397 | return 0; |
0400a6b0 | 1398 | } |
9cb81968 | 1399 | EXPORT_SYMBOL_GPL(nfs4_schedule_stateid_recovery); |
0400a6b0 | 1400 | |
6c2d8f8d TM |
1401 | static struct nfs4_lock_state * |
1402 | nfs_state_find_lock_state_by_stateid(struct nfs4_state *state, | |
1403 | const nfs4_stateid *stateid) | |
1404 | { | |
1405 | struct nfs4_lock_state *pos; | |
1406 | ||
1407 | list_for_each_entry(pos, &state->lock_states, ls_locks) { | |
1408 | if (!test_bit(NFS_LOCK_INITIALIZED, &pos->ls_flags)) | |
1409 | continue; | |
42c304c3 | 1410 | if (nfs4_stateid_match_or_older(&pos->ls_stateid, stateid)) |
6c2d8f8d TM |
1411 | return pos; |
1412 | } | |
1413 | return NULL; | |
1414 | } | |
1415 | ||
1416 | static bool nfs_state_lock_state_matches_stateid(struct nfs4_state *state, | |
1417 | const nfs4_stateid *stateid) | |
1418 | { | |
1419 | bool found = false; | |
1420 | ||
1421 | if (test_bit(LK_STATE_IN_USE, &state->flags)) { | |
1422 | spin_lock(&state->state_lock); | |
1423 | if (nfs_state_find_lock_state_by_stateid(state, stateid)) | |
1424 | found = true; | |
1425 | spin_unlock(&state->state_lock); | |
1426 | } | |
1427 | return found; | |
1428 | } | |
1429 | ||
a1d0b5ee TM |
1430 | void nfs_inode_find_state_and_recover(struct inode *inode, |
1431 | const nfs4_stateid *stateid) | |
1432 | { | |
1433 | struct nfs_client *clp = NFS_SERVER(inode)->nfs_client; | |
1434 | struct nfs_inode *nfsi = NFS_I(inode); | |
1435 | struct nfs_open_context *ctx; | |
1436 | struct nfs4_state *state; | |
1437 | bool found = false; | |
1438 | ||
0de43976 TM |
1439 | rcu_read_lock(); |
1440 | list_for_each_entry_rcu(ctx, &nfsi->open_files, list) { | |
a1d0b5ee TM |
1441 | state = ctx->state; |
1442 | if (state == NULL) | |
1443 | continue; | |
42c304c3 | 1444 | if (nfs4_stateid_match_or_older(&state->stateid, stateid) && |
7ebeb7fe | 1445 | nfs4_state_mark_reclaim_nograce(clp, state)) { |
6c2d8f8d | 1446 | found = true; |
a1d0b5ee | 1447 | continue; |
6c2d8f8d | 1448 | } |
42c304c3 TM |
1449 | if (test_bit(NFS_OPEN_STATE, &state->flags) && |
1450 | nfs4_stateid_match_or_older(&state->open_stateid, stateid) && | |
46280d9d TM |
1451 | nfs4_state_mark_reclaim_nograce(clp, state)) { |
1452 | found = true; | |
1453 | continue; | |
1454 | } | |
7ebeb7fe TM |
1455 | if (nfs_state_lock_state_matches_stateid(state, stateid) && |
1456 | nfs4_state_mark_reclaim_nograce(clp, state)) | |
6c2d8f8d | 1457 | found = true; |
a1d0b5ee | 1458 | } |
0de43976 | 1459 | rcu_read_unlock(); |
6c2d8f8d TM |
1460 | |
1461 | nfs_inode_find_delegation_state_and_recover(inode, stateid); | |
a1d0b5ee TM |
1462 | if (found) |
1463 | nfs4_schedule_state_manager(clp); | |
1464 | } | |
1465 | ||
86dbd08b | 1466 | static void nfs4_state_mark_open_context_bad(struct nfs4_state *state, int err) |
c58c8441 TM |
1467 | { |
1468 | struct inode *inode = state->inode; | |
1469 | struct nfs_inode *nfsi = NFS_I(inode); | |
1470 | struct nfs_open_context *ctx; | |
1471 | ||
0de43976 TM |
1472 | rcu_read_lock(); |
1473 | list_for_each_entry_rcu(ctx, &nfsi->open_files, list) { | |
c58c8441 TM |
1474 | if (ctx->state != state) |
1475 | continue; | |
1476 | set_bit(NFS_CONTEXT_BAD, &ctx->flags); | |
86dbd08b TM |
1477 | pr_warn("NFSv4: state recovery failed for open file %pd2, " |
1478 | "error = %d\n", ctx->dentry, err); | |
c58c8441 | 1479 | } |
0de43976 | 1480 | rcu_read_unlock(); |
c58c8441 TM |
1481 | } |
1482 | ||
5d422301 TM |
1483 | static void nfs4_state_mark_recovery_failed(struct nfs4_state *state, int error) |
1484 | { | |
1485 | set_bit(NFS_STATE_RECOVERY_FAILED, &state->flags); | |
86dbd08b | 1486 | nfs4_state_mark_open_context_bad(state, error); |
5d422301 TM |
1487 | } |
1488 | ||
a1d0b5ee | 1489 | |
02860014 | 1490 | static int nfs4_reclaim_locks(struct nfs4_state *state, const struct nfs4_state_recovery_ops *ops) |
1da177e4 LT |
1491 | { |
1492 | struct inode *inode = state->inode; | |
19e03c57 | 1493 | struct nfs_inode *nfsi = NFS_I(inode); |
1da177e4 | 1494 | struct file_lock *fl; |
dce2630c | 1495 | struct nfs4_lock_state *lsp; |
1da177e4 | 1496 | int status = 0; |
5263e31e | 1497 | struct file_lock_context *flctx = inode->i_flctx; |
bd61e0a9 | 1498 | struct list_head *list; |
1da177e4 | 1499 | |
bd61e0a9 | 1500 | if (flctx == NULL) |
3f09df70 TM |
1501 | return 0; |
1502 | ||
bd61e0a9 JL |
1503 | list = &flctx->flc_posix; |
1504 | ||
3f09df70 | 1505 | /* Guard against delegation returns and new lock/unlock calls */ |
19e03c57 | 1506 | down_write(&nfsi->rwsem); |
6109c850 | 1507 | spin_lock(&flctx->flc_lock); |
bd61e0a9 JL |
1508 | restart: |
1509 | list_for_each_entry(fl, list, fl_list) { | |
5263e31e JL |
1510 | if (nfs_file_open_context(fl->fl_file)->state != state) |
1511 | continue; | |
6109c850 | 1512 | spin_unlock(&flctx->flc_lock); |
5263e31e JL |
1513 | status = ops->recover_lock(state, fl); |
1514 | switch (status) { | |
1515 | case 0: | |
1516 | break; | |
67e7b52d | 1517 | case -ETIMEDOUT: |
5263e31e JL |
1518 | case -ESTALE: |
1519 | case -NFS4ERR_ADMIN_REVOKED: | |
1520 | case -NFS4ERR_STALE_STATEID: | |
1521 | case -NFS4ERR_BAD_STATEID: | |
1522 | case -NFS4ERR_EXPIRED: | |
1523 | case -NFS4ERR_NO_GRACE: | |
1524 | case -NFS4ERR_STALE_CLIENTID: | |
1525 | case -NFS4ERR_BADSESSION: | |
1526 | case -NFS4ERR_BADSLOT: | |
1527 | case -NFS4ERR_BAD_HIGH_SLOT: | |
1528 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
1529 | goto out; | |
1530 | default: | |
1531 | pr_err("NFS: %s: unhandled error %d\n", | |
1532 | __func__, status); | |
01e03bdc | 1533 | /* Fall through */ |
5263e31e JL |
1534 | case -ENOMEM: |
1535 | case -NFS4ERR_DENIED: | |
1536 | case -NFS4ERR_RECLAIM_BAD: | |
1537 | case -NFS4ERR_RECLAIM_CONFLICT: | |
dce2630c N |
1538 | lsp = fl->fl_u.nfs4_fl.owner; |
1539 | if (lsp) | |
1540 | set_bit(NFS_LOCK_LOST, &lsp->ls_flags); | |
5263e31e JL |
1541 | status = 0; |
1542 | } | |
6109c850 | 1543 | spin_lock(&flctx->flc_lock); |
5263e31e | 1544 | } |
bd61e0a9 JL |
1545 | if (list == &flctx->flc_posix) { |
1546 | list = &flctx->flc_flock; | |
1547 | goto restart; | |
1548 | } | |
6109c850 | 1549 | spin_unlock(&flctx->flc_lock); |
965b5d67 | 1550 | out: |
19e03c57 | 1551 | up_write(&nfsi->rwsem); |
1da177e4 LT |
1552 | return status; |
1553 | } | |
1554 | ||
80f42368 AS |
1555 | #ifdef CONFIG_NFS_V4_2 |
1556 | static void nfs42_complete_copies(struct nfs4_state_owner *sp, struct nfs4_state *state) | |
1557 | { | |
1558 | struct nfs4_copy_state *copy; | |
1559 | ||
0e65a32c OK |
1560 | if (!test_bit(NFS_CLNT_DST_SSC_COPY_STATE, &state->flags) && |
1561 | !test_bit(NFS_CLNT_SRC_SSC_COPY_STATE, &state->flags)) | |
80f42368 AS |
1562 | return; |
1563 | ||
1564 | spin_lock(&sp->so_server->nfs_client->cl_lock); | |
1565 | list_for_each_entry(copy, &sp->so_server->ss_copies, copies) { | |
0e65a32c OK |
1566 | if ((test_bit(NFS_CLNT_DST_SSC_COPY_STATE, &state->flags) && |
1567 | !nfs4_stateid_match_other(&state->stateid, | |
1568 | ©->parent_dst_state->stateid))) | |
1569 | continue; | |
80f42368 | 1570 | copy->flags = 1; |
0e65a32c OK |
1571 | if (test_and_clear_bit(NFS_CLNT_DST_SSC_COPY_STATE, |
1572 | &state->flags)) { | |
1573 | clear_bit(NFS_CLNT_SRC_SSC_COPY_STATE, &state->flags); | |
1574 | complete(©->completion); | |
1575 | } | |
1576 | } | |
1577 | list_for_each_entry(copy, &sp->so_server->ss_copies, src_copies) { | |
1578 | if ((test_bit(NFS_CLNT_SRC_SSC_COPY_STATE, &state->flags) && | |
1579 | !nfs4_stateid_match_other(&state->stateid, | |
1580 | ©->parent_src_state->stateid))) | |
1581 | continue; | |
1582 | copy->flags = 1; | |
1583 | if (test_and_clear_bit(NFS_CLNT_DST_SSC_COPY_STATE, | |
1584 | &state->flags)) | |
1585 | complete(©->completion); | |
80f42368 AS |
1586 | } |
1587 | spin_unlock(&sp->so_server->nfs_client->cl_lock); | |
1588 | } | |
1589 | #else /* !CONFIG_NFS_V4_2 */ | |
1590 | static inline void nfs42_complete_copies(struct nfs4_state_owner *sp, | |
1591 | struct nfs4_state *state) | |
1592 | { | |
1593 | } | |
1594 | #endif /* CONFIG_NFS_V4_2 */ | |
1595 | ||
cb7a8384 AS |
1596 | static int __nfs4_reclaim_open_state(struct nfs4_state_owner *sp, struct nfs4_state *state, |
1597 | const struct nfs4_state_recovery_ops *ops) | |
1598 | { | |
1599 | struct nfs4_lock_state *lock; | |
1600 | int status; | |
1601 | ||
1602 | status = ops->recover_open(sp, state); | |
1603 | if (status < 0) | |
1604 | return status; | |
1605 | ||
1606 | status = nfs4_reclaim_locks(state, ops); | |
1607 | if (status < 0) | |
1608 | return status; | |
1609 | ||
1610 | if (!test_bit(NFS_DELEGATED_STATE, &state->flags)) { | |
1611 | spin_lock(&state->state_lock); | |
1612 | list_for_each_entry(lock, &state->lock_states, ls_locks) { | |
21f86d2d | 1613 | trace_nfs4_state_lock_reclaim(state, lock); |
cb7a8384 AS |
1614 | if (!test_bit(NFS_LOCK_INITIALIZED, &lock->ls_flags)) |
1615 | pr_warn_ratelimited("NFS: %s: Lock reclaim failed!\n", __func__); | |
1616 | } | |
1617 | spin_unlock(&state->state_lock); | |
1618 | } | |
1619 | ||
80f42368 | 1620 | nfs42_complete_copies(sp, state); |
cb7a8384 AS |
1621 | clear_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags); |
1622 | return status; | |
1623 | } | |
1624 | ||
02860014 | 1625 | static int nfs4_reclaim_open_state(struct nfs4_state_owner *sp, const struct nfs4_state_recovery_ops *ops) |
1da177e4 LT |
1626 | { |
1627 | struct nfs4_state *state; | |
c34fae00 | 1628 | unsigned int loop = 0; |
1da177e4 | 1629 | int status = 0; |
0b9018b9 OK |
1630 | #ifdef CONFIG_NFS_V4_2 |
1631 | bool found_ssc_copy_state = false; | |
1632 | #endif /* CONFIG_NFS_V4_2 */ | |
1da177e4 LT |
1633 | |
1634 | /* Note: we rely on the sp->so_states list being ordered | |
1635 | * so that we always reclaim open(O_RDWR) and/or open(O_WRITE) | |
1636 | * states first. | |
1637 | * This is needed to ensure that the server won't give us any | |
1638 | * read delegations that we have to return if, say, we are | |
1639 | * recovering after a network partition or a reboot from a | |
1640 | * server that doesn't support a grace period. | |
1641 | */ | |
fe1d8195 | 1642 | spin_lock(&sp->so_lock); |
abbec2da | 1643 | raw_write_seqcount_begin(&sp->so_reclaim_seqcount); |
c137afab | 1644 | restart: |
1da177e4 | 1645 | list_for_each_entry(state, &sp->so_states, open_states) { |
b79a4a1b TM |
1646 | if (!test_and_clear_bit(ops->state_flag_bit, &state->flags)) |
1647 | continue; | |
5d422301 TM |
1648 | if (!nfs4_valid_open_stateid(state)) |
1649 | continue; | |
1da177e4 LT |
1650 | if (state->state == 0) |
1651 | continue; | |
0b9018b9 OK |
1652 | #ifdef CONFIG_NFS_V4_2 |
1653 | if (test_bit(NFS_SRV_SSC_COPY_STATE, &state->flags)) { | |
1654 | nfs4_state_mark_recovery_failed(state, -EIO); | |
1655 | found_ssc_copy_state = true; | |
1656 | continue; | |
1657 | } | |
1658 | #endif /* CONFIG_NFS_V4_2 */ | |
ace9fad4 | 1659 | refcount_inc(&state->count); |
fe1d8195 | 1660 | spin_unlock(&sp->so_lock); |
cb7a8384 | 1661 | status = __nfs4_reclaim_open_state(sp, state, ops); |
cb7a8384 | 1662 | |
1da177e4 | 1663 | switch (status) { |
35a61606 | 1664 | default: |
c34fae00 TM |
1665 | if (status >= 0) { |
1666 | loop = 0; | |
b79a4a1b | 1667 | break; |
c34fae00 | 1668 | } |
35a61606 AS |
1669 | printk(KERN_ERR "NFS: %s: unhandled error %d\n", __func__, status); |
1670 | /* Fall through */ | |
1671 | case -ENOENT: | |
1672 | case -ENOMEM: | |
1673 | case -EACCES: | |
1674 | case -EROFS: | |
1675 | case -EIO: | |
1676 | case -ESTALE: | |
1677 | /* Open state on this file cannot be recovered */ | |
1678 | nfs4_state_mark_recovery_failed(state, status); | |
1679 | break; | |
1680 | case -EAGAIN: | |
1681 | ssleep(1); | |
c34fae00 TM |
1682 | if (loop++ < 10) { |
1683 | set_bit(ops->state_flag_bit, &state->flags); | |
1684 | break; | |
1685 | } | |
35a61606 AS |
1686 | /* Fall through */ |
1687 | case -NFS4ERR_ADMIN_REVOKED: | |
1688 | case -NFS4ERR_STALE_STATEID: | |
1689 | case -NFS4ERR_OLD_STATEID: | |
1690 | case -NFS4ERR_BAD_STATEID: | |
1691 | case -NFS4ERR_RECLAIM_BAD: | |
1692 | case -NFS4ERR_RECLAIM_CONFLICT: | |
1693 | nfs4_state_mark_reclaim_nograce(sp->so_server->nfs_client, state); | |
1694 | break; | |
1695 | case -NFS4ERR_EXPIRED: | |
1696 | case -NFS4ERR_NO_GRACE: | |
1697 | nfs4_state_mark_reclaim_nograce(sp->so_server->nfs_client, state); | |
67e7b52d | 1698 | /* Fall through */ |
35a61606 AS |
1699 | case -NFS4ERR_STALE_CLIENTID: |
1700 | case -NFS4ERR_BADSESSION: | |
1701 | case -NFS4ERR_BADSLOT: | |
1702 | case -NFS4ERR_BAD_HIGH_SLOT: | |
1703 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
67e7b52d | 1704 | case -ETIMEDOUT: |
35a61606 | 1705 | goto out_err; |
1da177e4 | 1706 | } |
fe1d8195 | 1707 | nfs4_put_open_state(state); |
c137afab | 1708 | spin_lock(&sp->so_lock); |
fe1d8195 | 1709 | goto restart; |
1da177e4 | 1710 | } |
abbec2da | 1711 | raw_write_seqcount_end(&sp->so_reclaim_seqcount); |
fe1d8195 | 1712 | spin_unlock(&sp->so_lock); |
0b9018b9 OK |
1713 | #ifdef CONFIG_NFS_V4_2 |
1714 | if (found_ssc_copy_state) | |
1715 | return -EIO; | |
1716 | #endif /* CONFIG_NFS_V4_2 */ | |
1da177e4 LT |
1717 | return 0; |
1718 | out_err: | |
fe1d8195 | 1719 | nfs4_put_open_state(state); |
c137afab | 1720 | spin_lock(&sp->so_lock); |
abbec2da | 1721 | raw_write_seqcount_end(&sp->so_reclaim_seqcount); |
c137afab | 1722 | spin_unlock(&sp->so_lock); |
1da177e4 LT |
1723 | return status; |
1724 | } | |
1725 | ||
b79a4a1b TM |
1726 | static void nfs4_clear_open_state(struct nfs4_state *state) |
1727 | { | |
1728 | struct nfs4_lock_state *lock; | |
1729 | ||
1730 | clear_bit(NFS_DELEGATED_STATE, &state->flags); | |
1731 | clear_bit(NFS_O_RDONLY_STATE, &state->flags); | |
1732 | clear_bit(NFS_O_WRONLY_STATE, &state->flags); | |
1733 | clear_bit(NFS_O_RDWR_STATE, &state->flags); | |
4b44b40e | 1734 | spin_lock(&state->state_lock); |
b79a4a1b | 1735 | list_for_each_entry(lock, &state->lock_states, ls_locks) { |
b79a4a1b | 1736 | lock->ls_seqid.flags = 0; |
795a88c9 | 1737 | clear_bit(NFS_LOCK_INITIALIZED, &lock->ls_flags); |
b79a4a1b | 1738 | } |
4b44b40e | 1739 | spin_unlock(&state->state_lock); |
b79a4a1b TM |
1740 | } |
1741 | ||
24d292b8 CL |
1742 | static void nfs4_reset_seqids(struct nfs_server *server, |
1743 | int (*mark_reclaim)(struct nfs_client *clp, struct nfs4_state *state)) | |
cee54fc9 | 1744 | { |
24d292b8 | 1745 | struct nfs_client *clp = server->nfs_client; |
cee54fc9 | 1746 | struct nfs4_state_owner *sp; |
9f958ab8 | 1747 | struct rb_node *pos; |
cee54fc9 | 1748 | struct nfs4_state *state; |
cee54fc9 | 1749 | |
24d292b8 CL |
1750 | spin_lock(&clp->cl_lock); |
1751 | for (pos = rb_first(&server->state_owners); | |
1752 | pos != NULL; | |
1753 | pos = rb_next(pos)) { | |
1754 | sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); | |
cee54fc9 | 1755 | sp->so_seqid.flags = 0; |
ec073428 | 1756 | spin_lock(&sp->so_lock); |
cee54fc9 | 1757 | list_for_each_entry(state, &sp->so_states, open_states) { |
b79a4a1b TM |
1758 | if (mark_reclaim(clp, state)) |
1759 | nfs4_clear_open_state(state); | |
cee54fc9 | 1760 | } |
ec073428 | 1761 | spin_unlock(&sp->so_lock); |
cee54fc9 | 1762 | } |
24d292b8 CL |
1763 | spin_unlock(&clp->cl_lock); |
1764 | } | |
1765 | ||
1766 | static void nfs4_state_mark_reclaim_helper(struct nfs_client *clp, | |
1767 | int (*mark_reclaim)(struct nfs_client *clp, struct nfs4_state *state)) | |
1768 | { | |
1769 | struct nfs_server *server; | |
1770 | ||
1771 | rcu_read_lock(); | |
1772 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) | |
1773 | nfs4_reset_seqids(server, mark_reclaim); | |
1774 | rcu_read_unlock(); | |
cee54fc9 TM |
1775 | } |
1776 | ||
b79a4a1b TM |
1777 | static void nfs4_state_start_reclaim_reboot(struct nfs_client *clp) |
1778 | { | |
1779 | /* Mark all delegations for reclaim */ | |
1780 | nfs_delegation_mark_reclaim(clp); | |
1781 | nfs4_state_mark_reclaim_helper(clp, nfs4_state_mark_reclaim_reboot); | |
1782 | } | |
1783 | ||
0048fdd0 | 1784 | static int nfs4_reclaim_complete(struct nfs_client *clp, |
965e9c23 | 1785 | const struct nfs4_state_recovery_ops *ops, |
a52458b4 | 1786 | const struct cred *cred) |
fce5c838 RL |
1787 | { |
1788 | /* Notify the server we're done reclaiming our state */ | |
1789 | if (ops->reclaim_complete) | |
0048fdd0 TM |
1790 | return ops->reclaim_complete(clp, cred); |
1791 | return 0; | |
fce5c838 RL |
1792 | } |
1793 | ||
24d292b8 | 1794 | static void nfs4_clear_reclaim_server(struct nfs_server *server) |
b79a4a1b | 1795 | { |
24d292b8 | 1796 | struct nfs_client *clp = server->nfs_client; |
b79a4a1b TM |
1797 | struct nfs4_state_owner *sp; |
1798 | struct rb_node *pos; | |
1799 | struct nfs4_state *state; | |
1800 | ||
24d292b8 CL |
1801 | spin_lock(&clp->cl_lock); |
1802 | for (pos = rb_first(&server->state_owners); | |
1803 | pos != NULL; | |
1804 | pos = rb_next(pos)) { | |
1805 | sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); | |
b79a4a1b TM |
1806 | spin_lock(&sp->so_lock); |
1807 | list_for_each_entry(state, &sp->so_states, open_states) { | |
24d292b8 CL |
1808 | if (!test_and_clear_bit(NFS_STATE_RECLAIM_REBOOT, |
1809 | &state->flags)) | |
b79a4a1b TM |
1810 | continue; |
1811 | nfs4_state_mark_reclaim_nograce(clp, state); | |
1812 | } | |
1813 | spin_unlock(&sp->so_lock); | |
1814 | } | |
24d292b8 CL |
1815 | spin_unlock(&clp->cl_lock); |
1816 | } | |
1817 | ||
1818 | static int nfs4_state_clear_reclaim_reboot(struct nfs_client *clp) | |
1819 | { | |
1820 | struct nfs_server *server; | |
1821 | ||
1822 | if (!test_and_clear_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) | |
1823 | return 0; | |
1824 | ||
1825 | rcu_read_lock(); | |
1826 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) | |
1827 | nfs4_clear_reclaim_server(server); | |
1828 | rcu_read_unlock(); | |
b79a4a1b TM |
1829 | |
1830 | nfs_delegation_reap_unclaimed(clp); | |
6eaa6149 TM |
1831 | return 1; |
1832 | } | |
1833 | ||
1834 | static void nfs4_state_end_reclaim_reboot(struct nfs_client *clp) | |
1835 | { | |
965e9c23 | 1836 | const struct nfs4_state_recovery_ops *ops; |
a52458b4 | 1837 | const struct cred *cred; |
0048fdd0 | 1838 | int err; |
965e9c23 | 1839 | |
6eaa6149 TM |
1840 | if (!nfs4_state_clear_reclaim_reboot(clp)) |
1841 | return; | |
965e9c23 | 1842 | ops = clp->cl_mvops->reboot_recovery_ops; |
73d8bde5 | 1843 | cred = nfs4_get_clid_cred(clp); |
0048fdd0 | 1844 | err = nfs4_reclaim_complete(clp, ops, cred); |
a52458b4 | 1845 | put_cred(cred); |
0048fdd0 TM |
1846 | if (err == -NFS4ERR_CONN_NOT_BOUND_TO_SESSION) |
1847 | set_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state); | |
b79a4a1b TM |
1848 | } |
1849 | ||
b79a4a1b TM |
1850 | static void nfs4_state_start_reclaim_nograce(struct nfs_client *clp) |
1851 | { | |
45870d69 | 1852 | nfs_mark_test_expired_all_delegations(clp); |
b79a4a1b TM |
1853 | nfs4_state_mark_reclaim_helper(clp, nfs4_state_mark_reclaim_nograce); |
1854 | } | |
1855 | ||
4f7cdf18 | 1856 | static int nfs4_recovery_handle_error(struct nfs_client *clp, int error) |
e598d843 TM |
1857 | { |
1858 | switch (error) { | |
000d3f95 AS |
1859 | case 0: |
1860 | break; | |
1861 | case -NFS4ERR_CB_PATH_DOWN: | |
1862 | nfs40_handle_cb_pathdown(clp); | |
1863 | break; | |
1864 | case -NFS4ERR_NO_GRACE: | |
1865 | nfs4_state_end_reclaim_reboot(clp); | |
1866 | break; | |
1867 | case -NFS4ERR_STALE_CLIENTID: | |
1868 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1869 | nfs4_state_start_reclaim_reboot(clp); | |
1870 | break; | |
1871 | case -NFS4ERR_EXPIRED: | |
1872 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1873 | nfs4_state_start_reclaim_nograce(clp); | |
1874 | break; | |
1875 | case -NFS4ERR_BADSESSION: | |
1876 | case -NFS4ERR_BADSLOT: | |
1877 | case -NFS4ERR_BAD_HIGH_SLOT: | |
1878 | case -NFS4ERR_DEADSESSION: | |
1879 | case -NFS4ERR_SEQ_FALSE_RETRY: | |
1880 | case -NFS4ERR_SEQ_MISORDERED: | |
1881 | set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); | |
1882 | /* Zero session reset errors */ | |
1883 | break; | |
1884 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
1885 | set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); | |
1886 | break; | |
1887 | default: | |
1888 | dprintk("%s: failed to handle error %d for server %s\n", | |
1889 | __func__, error, clp->cl_hostname); | |
1890 | return error; | |
e598d843 | 1891 | } |
cc0a9843 TM |
1892 | dprintk("%s: handled error %d for server %s\n", __func__, error, |
1893 | clp->cl_hostname); | |
4f38e4aa | 1894 | return 0; |
e598d843 TM |
1895 | } |
1896 | ||
02860014 | 1897 | static int nfs4_do_reclaim(struct nfs_client *clp, const struct nfs4_state_recovery_ops *ops) |
1da177e4 | 1898 | { |
24d292b8 CL |
1899 | struct nfs4_state_owner *sp; |
1900 | struct nfs_server *server; | |
9f958ab8 | 1901 | struct rb_node *pos; |
c77e2283 | 1902 | LIST_HEAD(freeme); |
1da177e4 LT |
1903 | int status = 0; |
1904 | ||
7eff03ae | 1905 | restart: |
24d292b8 CL |
1906 | rcu_read_lock(); |
1907 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { | |
c77e2283 | 1908 | nfs4_purge_state_owners(server, &freeme); |
24d292b8 CL |
1909 | spin_lock(&clp->cl_lock); |
1910 | for (pos = rb_first(&server->state_owners); | |
1911 | pos != NULL; | |
1912 | pos = rb_next(pos)) { | |
1913 | sp = rb_entry(pos, | |
1914 | struct nfs4_state_owner, so_server_node); | |
1915 | if (!test_and_clear_bit(ops->owner_flag_bit, | |
1916 | &sp->so_flags)) | |
1917 | continue; | |
4a0954ef TM |
1918 | if (!atomic_inc_not_zero(&sp->so_count)) |
1919 | continue; | |
24d292b8 CL |
1920 | spin_unlock(&clp->cl_lock); |
1921 | rcu_read_unlock(); | |
1922 | ||
1923 | status = nfs4_reclaim_open_state(sp, ops); | |
1924 | if (status < 0) { | |
1925 | set_bit(ops->owner_flag_bit, &sp->so_flags); | |
1926 | nfs4_put_state_owner(sp); | |
df817ba3 TM |
1927 | status = nfs4_recovery_handle_error(clp, status); |
1928 | return (status != 0) ? status : -EAGAIN; | |
24d292b8 CL |
1929 | } |
1930 | ||
7eff03ae | 1931 | nfs4_put_state_owner(sp); |
24d292b8 | 1932 | goto restart; |
7eff03ae | 1933 | } |
24d292b8 | 1934 | spin_unlock(&clp->cl_lock); |
02860014 | 1935 | } |
24d292b8 | 1936 | rcu_read_unlock(); |
c77e2283 | 1937 | nfs4_free_state_owners(&freeme); |
df817ba3 | 1938 | return 0; |
02860014 TM |
1939 | } |
1940 | ||
1941 | static int nfs4_check_lease(struct nfs_client *clp) | |
1942 | { | |
a52458b4 | 1943 | const struct cred *cred; |
c48f4f35 TM |
1944 | const struct nfs4_state_maintenance_ops *ops = |
1945 | clp->cl_mvops->state_renewal_ops; | |
4f38e4aa | 1946 | int status; |
1da177e4 | 1947 | |
0f605b56 TM |
1948 | /* Is the client already known to have an expired lease? */ |
1949 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) | |
1950 | return 0; | |
f15e1e8b | 1951 | cred = ops->get_state_renewal_cred(clp); |
0f605b56 | 1952 | if (cred == NULL) { |
73d8bde5 | 1953 | cred = nfs4_get_clid_cred(clp); |
4f38e4aa | 1954 | status = -ENOKEY; |
0f605b56 TM |
1955 | if (cred == NULL) |
1956 | goto out; | |
286d7d6a | 1957 | } |
8e69514f | 1958 | status = ops->renew_lease(clp, cred); |
a52458b4 | 1959 | put_cred(cred); |
bc7a05ca TM |
1960 | if (status == -ETIMEDOUT) { |
1961 | set_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); | |
1962 | return 0; | |
1963 | } | |
0f605b56 | 1964 | out: |
4f7cdf18 | 1965 | return nfs4_recovery_handle_error(clp, status); |
02860014 TM |
1966 | } |
1967 | ||
47b803c8 AA |
1968 | /* Set NFS4CLNT_LEASE_EXPIRED and reclaim reboot state for all v4.0 errors |
1969 | * and for recoverable errors on EXCHANGE_ID for v4.1 | |
2a6ee6aa TM |
1970 | */ |
1971 | static int nfs4_handle_reclaim_lease_error(struct nfs_client *clp, int status) | |
1972 | { | |
1973 | switch (status) { | |
89a21736 TM |
1974 | case -NFS4ERR_SEQ_MISORDERED: |
1975 | if (test_and_set_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) | |
1976 | return -ESERVERFAULT; | |
1977 | /* Lease confirmation error: retry after purging the lease */ | |
1978 | ssleep(1); | |
47b803c8 AA |
1979 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
1980 | break; | |
2a6ee6aa TM |
1981 | case -NFS4ERR_STALE_CLIENTID: |
1982 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); | |
47b803c8 | 1983 | nfs4_state_start_reclaim_reboot(clp); |
2a6ee6aa | 1984 | break; |
de734831 CL |
1985 | case -NFS4ERR_CLID_INUSE: |
1986 | pr_err("NFS: Server %s reports our clientid is in use\n", | |
1987 | clp->cl_hostname); | |
1988 | nfs_mark_client_ready(clp, -EPERM); | |
1989 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); | |
1990 | return -EPERM; | |
2a6ee6aa | 1991 | case -EACCES: |
2a6ee6aa | 1992 | case -NFS4ERR_DELAY: |
2a6ee6aa TM |
1993 | case -EAGAIN: |
1994 | ssleep(1); | |
1995 | break; | |
1996 | ||
1997 | case -NFS4ERR_MINOR_VERS_MISMATCH: | |
1998 | if (clp->cl_cons_state == NFS_CS_SESSION_INITING) | |
1999 | nfs_mark_client_ready(clp, -EPROTONOSUPPORT); | |
cc0a9843 TM |
2000 | dprintk("%s: exit with error %d for server %s\n", |
2001 | __func__, -EPROTONOSUPPORT, clp->cl_hostname); | |
2a6ee6aa | 2002 | return -EPROTONOSUPPORT; |
2a6ee6aa TM |
2003 | case -NFS4ERR_NOT_SAME: /* FixMe: implement recovery |
2004 | * in nfs4_exchange_id */ | |
2005 | default: | |
cc0a9843 TM |
2006 | dprintk("%s: exit with error %d for server %s\n", __func__, |
2007 | status, clp->cl_hostname); | |
2a6ee6aa TM |
2008 | return status; |
2009 | } | |
2010 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
cc0a9843 TM |
2011 | dprintk("%s: handled error %d for server %s\n", __func__, status, |
2012 | clp->cl_hostname); | |
2a6ee6aa TM |
2013 | return 0; |
2014 | } | |
2015 | ||
b42353ff | 2016 | static int nfs4_establish_lease(struct nfs_client *clp) |
02860014 | 2017 | { |
a52458b4 | 2018 | const struct cred *cred; |
c48f4f35 TM |
2019 | const struct nfs4_state_recovery_ops *ops = |
2020 | clp->cl_mvops->reboot_recovery_ops; | |
2a6ee6aa | 2021 | int status; |
02860014 | 2022 | |
8aafd2fd TM |
2023 | status = nfs4_begin_drain_session(clp); |
2024 | if (status != 0) | |
2025 | return status; | |
73d8bde5 | 2026 | cred = nfs4_get_clid_cred(clp); |
2a6ee6aa TM |
2027 | if (cred == NULL) |
2028 | return -ENOENT; | |
2029 | status = ops->establish_clid(clp, cred); | |
a52458b4 | 2030 | put_cred(cred); |
2a6ee6aa | 2031 | if (status != 0) |
b42353ff TM |
2032 | return status; |
2033 | pnfs_destroy_all_layouts(clp); | |
2034 | return 0; | |
2035 | } | |
2036 | ||
6bbb4ae8 CL |
2037 | /* |
2038 | * Returns zero or a negative errno. NFS4ERR values are converted | |
2039 | * to local errno values. | |
2040 | */ | |
b42353ff TM |
2041 | static int nfs4_reclaim_lease(struct nfs_client *clp) |
2042 | { | |
2043 | int status; | |
2044 | ||
2045 | status = nfs4_establish_lease(clp); | |
2046 | if (status < 0) | |
2047 | return nfs4_handle_reclaim_lease_error(clp, status); | |
2048 | if (test_and_clear_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state)) | |
2049 | nfs4_state_start_reclaim_nograce(clp); | |
2050 | if (!test_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) | |
2051 | set_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state); | |
2052 | clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); | |
2053 | clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
2054 | return 0; | |
2055 | } | |
2056 | ||
2057 | static int nfs4_purge_lease(struct nfs_client *clp) | |
2058 | { | |
2059 | int status; | |
2060 | ||
2061 | status = nfs4_establish_lease(clp); | |
2062 | if (status < 0) | |
2a6ee6aa | 2063 | return nfs4_handle_reclaim_lease_error(clp, status); |
b42353ff TM |
2064 | clear_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state); |
2065 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
2066 | nfs4_state_start_reclaim_nograce(clp); | |
2a6ee6aa | 2067 | return 0; |
02860014 TM |
2068 | } |
2069 | ||
c9fdeb28 CL |
2070 | /* |
2071 | * Try remote migration of one FSID from a source server to a | |
2072 | * destination server. The source server provides a list of | |
2073 | * potential destinations. | |
2074 | * | |
2075 | * Returns zero or a negative NFS4ERR status code. | |
2076 | */ | |
a52458b4 | 2077 | static int nfs4_try_migration(struct nfs_server *server, const struct cred *cred) |
c9fdeb28 CL |
2078 | { |
2079 | struct nfs_client *clp = server->nfs_client; | |
2080 | struct nfs4_fs_locations *locations = NULL; | |
2081 | struct inode *inode; | |
2082 | struct page *page; | |
2083 | int status, result; | |
2084 | ||
2085 | dprintk("--> %s: FSID %llx:%llx on \"%s\"\n", __func__, | |
2086 | (unsigned long long)server->fsid.major, | |
2087 | (unsigned long long)server->fsid.minor, | |
2088 | clp->cl_hostname); | |
2089 | ||
2090 | result = 0; | |
2091 | page = alloc_page(GFP_KERNEL); | |
2092 | locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL); | |
2093 | if (page == NULL || locations == NULL) { | |
2094 | dprintk("<-- %s: no memory\n", __func__); | |
2095 | goto out; | |
2096 | } | |
2097 | ||
2b0143b5 | 2098 | inode = d_inode(server->super->s_root); |
c9fdeb28 CL |
2099 | result = nfs4_proc_get_locations(inode, locations, page, cred); |
2100 | if (result) { | |
2101 | dprintk("<-- %s: failed to retrieve fs_locations: %d\n", | |
2102 | __func__, result); | |
2103 | goto out; | |
2104 | } | |
2105 | ||
2106 | result = -NFS4ERR_NXIO; | |
2107 | if (!(locations->fattr.valid & NFS_ATTR_FATTR_V4_LOCATIONS)) { | |
2108 | dprintk("<-- %s: No fs_locations data, migration skipped\n", | |
2109 | __func__); | |
2110 | goto out; | |
2111 | } | |
2112 | ||
8aafd2fd | 2113 | status = nfs4_begin_drain_session(clp); |
1e672e36 WW |
2114 | if (status != 0) { |
2115 | result = status; | |
2116 | goto out; | |
2117 | } | |
c9fdeb28 CL |
2118 | |
2119 | status = nfs4_replace_transport(server, locations); | |
2120 | if (status != 0) { | |
2121 | dprintk("<-- %s: failed to replace transport: %d\n", | |
2122 | __func__, status); | |
2123 | goto out; | |
2124 | } | |
2125 | ||
2126 | result = 0; | |
2127 | dprintk("<-- %s: migration succeeded\n", __func__); | |
2128 | ||
2129 | out: | |
2130 | if (page != NULL) | |
2131 | __free_page(page); | |
2132 | kfree(locations); | |
2133 | if (result) { | |
2134 | pr_err("NFS: migration recovery failed (server %s)\n", | |
2135 | clp->cl_hostname); | |
2136 | set_bit(NFS_MIG_FAILED, &server->mig_status); | |
2137 | } | |
2138 | return result; | |
2139 | } | |
2140 | ||
2141 | /* | |
2142 | * Returns zero or a negative NFS4ERR status code. | |
2143 | */ | |
2144 | static int nfs4_handle_migration(struct nfs_client *clp) | |
2145 | { | |
2146 | const struct nfs4_state_maintenance_ops *ops = | |
2147 | clp->cl_mvops->state_renewal_ops; | |
2148 | struct nfs_server *server; | |
a52458b4 | 2149 | const struct cred *cred; |
c9fdeb28 CL |
2150 | |
2151 | dprintk("%s: migration reported on \"%s\"\n", __func__, | |
2152 | clp->cl_hostname); | |
2153 | ||
f15e1e8b | 2154 | cred = ops->get_state_renewal_cred(clp); |
c9fdeb28 CL |
2155 | if (cred == NULL) |
2156 | return -NFS4ERR_NOENT; | |
2157 | ||
2158 | clp->cl_mig_gen++; | |
2159 | restart: | |
2160 | rcu_read_lock(); | |
2161 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { | |
2162 | int status; | |
2163 | ||
2164 | if (server->mig_gen == clp->cl_mig_gen) | |
2165 | continue; | |
2166 | server->mig_gen = clp->cl_mig_gen; | |
2167 | ||
2168 | if (!test_and_clear_bit(NFS_MIG_IN_TRANSITION, | |
2169 | &server->mig_status)) | |
2170 | continue; | |
2171 | ||
2172 | rcu_read_unlock(); | |
2173 | status = nfs4_try_migration(server, cred); | |
2174 | if (status < 0) { | |
a52458b4 | 2175 | put_cred(cred); |
c9fdeb28 CL |
2176 | return status; |
2177 | } | |
2178 | goto restart; | |
2179 | } | |
2180 | rcu_read_unlock(); | |
a52458b4 | 2181 | put_cred(cred); |
c9fdeb28 CL |
2182 | return 0; |
2183 | } | |
2184 | ||
b7f7a66e CL |
2185 | /* |
2186 | * Test each nfs_server on the clp's cl_superblocks list to see | |
2187 | * if it's moved to another server. Stop when the server no longer | |
2188 | * returns NFS4ERR_LEASE_MOVED. | |
2189 | */ | |
2190 | static int nfs4_handle_lease_moved(struct nfs_client *clp) | |
2191 | { | |
2192 | const struct nfs4_state_maintenance_ops *ops = | |
2193 | clp->cl_mvops->state_renewal_ops; | |
2194 | struct nfs_server *server; | |
a52458b4 | 2195 | const struct cred *cred; |
b7f7a66e CL |
2196 | |
2197 | dprintk("%s: lease moved reported on \"%s\"\n", __func__, | |
2198 | clp->cl_hostname); | |
2199 | ||
f15e1e8b | 2200 | cred = ops->get_state_renewal_cred(clp); |
b7f7a66e CL |
2201 | if (cred == NULL) |
2202 | return -NFS4ERR_NOENT; | |
2203 | ||
2204 | clp->cl_mig_gen++; | |
2205 | restart: | |
2206 | rcu_read_lock(); | |
2207 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { | |
2208 | struct inode *inode; | |
2209 | int status; | |
2210 | ||
2211 | if (server->mig_gen == clp->cl_mig_gen) | |
2212 | continue; | |
2213 | server->mig_gen = clp->cl_mig_gen; | |
2214 | ||
2215 | rcu_read_unlock(); | |
2216 | ||
2b0143b5 | 2217 | inode = d_inode(server->super->s_root); |
b7f7a66e CL |
2218 | status = nfs4_proc_fsid_present(inode, cred); |
2219 | if (status != -NFS4ERR_MOVED) | |
2220 | goto restart; /* wasn't this one */ | |
2221 | if (nfs4_try_migration(server, cred) == -NFS4ERR_LEASE_MOVED) | |
2222 | goto restart; /* there are more */ | |
2223 | goto out; | |
2224 | } | |
2225 | rcu_read_unlock(); | |
2226 | ||
2227 | out: | |
a52458b4 | 2228 | put_cred(cred); |
b7f7a66e CL |
2229 | return 0; |
2230 | } | |
2231 | ||
05f4c350 CL |
2232 | /** |
2233 | * nfs4_discover_server_trunking - Detect server IP address trunking | |
2234 | * | |
2235 | * @clp: nfs_client under test | |
2236 | * @result: OUT: found nfs_client, or clp | |
2237 | * | |
2238 | * Returns zero or a negative errno. If zero is returned, | |
2239 | * an nfs_client pointer is planted in "result". | |
2240 | * | |
2241 | * Note: since we are invoked in process context, and | |
2242 | * not from inside the state manager, we cannot use | |
2243 | * nfs4_handle_reclaim_lease_error(). | |
2244 | */ | |
2245 | int nfs4_discover_server_trunking(struct nfs_client *clp, | |
2246 | struct nfs_client **result) | |
2247 | { | |
2248 | const struct nfs4_state_recovery_ops *ops = | |
2249 | clp->cl_mvops->reboot_recovery_ops; | |
05f4c350 | 2250 | struct rpc_clnt *clnt; |
a52458b4 | 2251 | const struct cred *cred; |
4edaa308 | 2252 | int i, status; |
05f4c350 CL |
2253 | |
2254 | dprintk("NFS: %s: testing '%s'\n", __func__, clp->cl_hostname); | |
2255 | ||
05f4c350 | 2256 | clnt = clp->cl_rpcclient; |
05f4c350 CL |
2257 | i = 0; |
2258 | ||
2259 | mutex_lock(&nfs_clid_init_mutex); | |
05f4c350 | 2260 | again: |
ea33e6c3 | 2261 | status = -ENOENT; |
73d8bde5 | 2262 | cred = nfs4_get_clid_cred(clp); |
05f4c350 CL |
2263 | if (cred == NULL) |
2264 | goto out_unlock; | |
2265 | ||
2266 | status = ops->detect_trunking(clp, result, cred); | |
a52458b4 | 2267 | put_cred(cred); |
05f4c350 CL |
2268 | switch (status) { |
2269 | case 0: | |
898fc11b TM |
2270 | case -EINTR: |
2271 | case -ERESTARTSYS: | |
05f4c350 | 2272 | break; |
05f4c350 | 2273 | case -ETIMEDOUT: |
150e7260 TM |
2274 | if (clnt->cl_softrtry) |
2275 | break; | |
01e03bdc | 2276 | /* Fall through */ |
150e7260 | 2277 | case -NFS4ERR_DELAY: |
05f4c350 CL |
2278 | case -EAGAIN: |
2279 | ssleep(1); | |
01e03bdc | 2280 | /* Fall through */ |
202c312d | 2281 | case -NFS4ERR_STALE_CLIENTID: |
05f4c350 CL |
2282 | dprintk("NFS: %s after status %d, retrying\n", |
2283 | __func__, status); | |
2284 | goto again; | |
4edaa308 | 2285 | case -EACCES: |
d688f7b8 CL |
2286 | if (i++ == 0) { |
2287 | nfs4_root_machine_cred(clp); | |
2288 | goto again; | |
2289 | } | |
6d769f1e | 2290 | if (clnt->cl_auth->au_flavor == RPC_AUTH_UNIX) |
4edaa308 | 2291 | break; |
01e03bdc | 2292 | /* Fall through */ |
05f4c350 CL |
2293 | case -NFS4ERR_CLID_INUSE: |
2294 | case -NFS4ERR_WRONGSEC: | |
6d769f1e JL |
2295 | /* No point in retrying if we already used RPC_AUTH_UNIX */ |
2296 | if (clnt->cl_auth->au_flavor == RPC_AUTH_UNIX) { | |
2297 | status = -EPERM; | |
2298 | break; | |
2299 | } | |
79d852bf | 2300 | clnt = rpc_clone_client_set_auth(clnt, RPC_AUTH_UNIX); |
05f4c350 CL |
2301 | if (IS_ERR(clnt)) { |
2302 | status = PTR_ERR(clnt); | |
2303 | break; | |
2304 | } | |
b193d59a TM |
2305 | /* Note: this is safe because we haven't yet marked the |
2306 | * client as ready, so we are the only user of | |
2307 | * clp->cl_rpcclient | |
2308 | */ | |
2309 | clnt = xchg(&clp->cl_rpcclient, clnt); | |
2310 | rpc_shutdown_client(clnt); | |
2311 | clnt = clp->cl_rpcclient; | |
05f4c350 CL |
2312 | goto again; |
2313 | ||
2314 | case -NFS4ERR_MINOR_VERS_MISMATCH: | |
2315 | status = -EPROTONOSUPPORT; | |
2316 | break; | |
2317 | ||
2318 | case -EKEYEXPIRED: | |
05f4c350 CL |
2319 | case -NFS4ERR_NOT_SAME: /* FixMe: implement recovery |
2320 | * in nfs4_exchange_id */ | |
2321 | status = -EKEYEXPIRED; | |
ea33e6c3 TM |
2322 | break; |
2323 | default: | |
2324 | pr_warn("NFS: %s unhandled error %d. Exiting with error EIO\n", | |
2325 | __func__, status); | |
2326 | status = -EIO; | |
05f4c350 CL |
2327 | } |
2328 | ||
2329 | out_unlock: | |
2330 | mutex_unlock(&nfs_clid_init_mutex); | |
05f4c350 CL |
2331 | dprintk("NFS: %s: status = %d\n", __func__, status); |
2332 | return status; | |
2333 | } | |
2334 | ||
76db6d95 | 2335 | #ifdef CONFIG_NFS_V4_1 |
9f594791 | 2336 | void nfs4_schedule_session_recovery(struct nfs4_session *session, int err) |
0400a6b0 | 2337 | { |
444f72fe TM |
2338 | struct nfs_client *clp = session->clp; |
2339 | ||
9f594791 TM |
2340 | switch (err) { |
2341 | default: | |
2342 | set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); | |
2343 | break; | |
2344 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
2345 | set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); | |
2346 | } | |
d94cbf6c | 2347 | nfs4_schedule_state_manager(clp); |
0400a6b0 | 2348 | } |
cbdabc7f | 2349 | EXPORT_SYMBOL_GPL(nfs4_schedule_session_recovery); |
0400a6b0 | 2350 | |
3f10a6af | 2351 | void nfs41_notify_server(struct nfs_client *clp) |
ac074835 TM |
2352 | { |
2353 | /* Use CHECK_LEASE to ping the server with a SEQUENCE */ | |
2354 | set_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); | |
2355 | nfs4_schedule_state_manager(clp); | |
2356 | } | |
2357 | ||
0f79fd6f TM |
2358 | static void nfs4_reset_all_state(struct nfs_client *clp) |
2359 | { | |
2360 | if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) == 0) { | |
2c820d9a | 2361 | set_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state); |
be0bfed0 | 2362 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
0f79fd6f | 2363 | nfs4_state_start_reclaim_nograce(clp); |
cc0a9843 TM |
2364 | dprintk("%s: scheduling reset of all state for server %s!\n", |
2365 | __func__, clp->cl_hostname); | |
0400a6b0 | 2366 | nfs4_schedule_state_manager(clp); |
0f79fd6f TM |
2367 | } |
2368 | } | |
2369 | ||
2370 | static void nfs41_handle_server_reboot(struct nfs_client *clp) | |
2371 | { | |
2372 | if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) == 0) { | |
2373 | nfs4_state_start_reclaim_reboot(clp); | |
cc0a9843 TM |
2374 | dprintk("%s: server %s rebooted!\n", __func__, |
2375 | clp->cl_hostname); | |
0400a6b0 | 2376 | nfs4_schedule_state_manager(clp); |
0f79fd6f TM |
2377 | } |
2378 | } | |
2379 | ||
8b895ce6 | 2380 | static void nfs41_handle_all_state_revoked(struct nfs_client *clp) |
0f79fd6f | 2381 | { |
0f79fd6f | 2382 | nfs4_reset_all_state(clp); |
cc0a9843 | 2383 | dprintk("%s: state revoked on server %s\n", __func__, clp->cl_hostname); |
0f79fd6f TM |
2384 | } |
2385 | ||
8b895ce6 TM |
2386 | static void nfs41_handle_some_state_revoked(struct nfs_client *clp) |
2387 | { | |
45870d69 | 2388 | nfs4_state_start_reclaim_nograce(clp); |
8b895ce6 TM |
2389 | nfs4_schedule_state_manager(clp); |
2390 | ||
2391 | dprintk("%s: state revoked on server %s\n", __func__, clp->cl_hostname); | |
2392 | } | |
2393 | ||
0f79fd6f TM |
2394 | static void nfs41_handle_recallable_state_revoked(struct nfs_client *clp) |
2395 | { | |
4099287f TM |
2396 | /* FIXME: For now, we destroy all layouts. */ |
2397 | pnfs_destroy_all_layouts(clp); | |
8ca017c8 | 2398 | nfs_test_expired_all_delegations(clp); |
cc0a9843 TM |
2399 | dprintk("%s: Recallable state revoked on server %s!\n", __func__, |
2400 | clp->cl_hostname); | |
0f79fd6f TM |
2401 | } |
2402 | ||
a9e64442 | 2403 | static void nfs41_handle_backchannel_fault(struct nfs_client *clp) |
0f79fd6f | 2404 | { |
b1352905 TM |
2405 | set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); |
2406 | nfs4_schedule_state_manager(clp); | |
2407 | ||
cc0a9843 TM |
2408 | dprintk("%s: server %s declared a backchannel fault\n", __func__, |
2409 | clp->cl_hostname); | |
0f79fd6f TM |
2410 | } |
2411 | ||
a9e64442 WAA |
2412 | static void nfs41_handle_cb_path_down(struct nfs_client *clp) |
2413 | { | |
2414 | if (test_and_set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, | |
2415 | &clp->cl_state) == 0) | |
2416 | nfs4_schedule_state_manager(clp); | |
2417 | } | |
2418 | ||
0a014a44 TM |
2419 | void nfs41_handle_sequence_flag_errors(struct nfs_client *clp, u32 flags, |
2420 | bool recovery) | |
0629e370 AB |
2421 | { |
2422 | if (!flags) | |
2423 | return; | |
2c820d9a CL |
2424 | |
2425 | dprintk("%s: \"%s\" (client ID %llx) flags=0x%08x\n", | |
2426 | __func__, clp->cl_hostname, clp->cl_clientid, flags); | |
0a014a44 TM |
2427 | /* |
2428 | * If we're called from the state manager thread, then assume we're | |
2429 | * already handling the RECLAIM_NEEDED and/or STATE_REVOKED. | |
2430 | * Those flags are expected to remain set until we're done | |
2431 | * recovering (see RFC5661, section 18.46.3). | |
2432 | */ | |
2433 | if (recovery) | |
2434 | goto out_recovery; | |
2c820d9a | 2435 | |
111d489f | 2436 | if (flags & SEQ4_STATUS_RESTART_RECLAIM_NEEDED) |
0f79fd6f | 2437 | nfs41_handle_server_reboot(clp); |
8b895ce6 TM |
2438 | if (flags & (SEQ4_STATUS_EXPIRED_ALL_STATE_REVOKED)) |
2439 | nfs41_handle_all_state_revoked(clp); | |
2440 | if (flags & (SEQ4_STATUS_EXPIRED_SOME_STATE_REVOKED | | |
d1c2331e | 2441 | SEQ4_STATUS_ADMIN_STATE_REVOKED)) |
8b895ce6 | 2442 | nfs41_handle_some_state_revoked(clp); |
d1c2331e CL |
2443 | if (flags & SEQ4_STATUS_LEASE_MOVED) |
2444 | nfs4_schedule_lease_moved_recovery(clp); | |
111d489f | 2445 | if (flags & SEQ4_STATUS_RECALLABLE_STATE_REVOKED) |
0f79fd6f | 2446 | nfs41_handle_recallable_state_revoked(clp); |
0a014a44 | 2447 | out_recovery: |
a9e64442 WAA |
2448 | if (flags & SEQ4_STATUS_BACKCHANNEL_FAULT) |
2449 | nfs41_handle_backchannel_fault(clp); | |
2450 | else if (flags & (SEQ4_STATUS_CB_PATH_DOWN | | |
2451 | SEQ4_STATUS_CB_PATH_DOWN_SESSION)) | |
0f79fd6f | 2452 | nfs41_handle_cb_path_down(clp); |
0629e370 AB |
2453 | } |
2454 | ||
c3fad1b1 AA |
2455 | static int nfs4_reset_session(struct nfs_client *clp) |
2456 | { | |
a52458b4 | 2457 | const struct cred *cred; |
c3fad1b1 AA |
2458 | int status; |
2459 | ||
1a47e7a6 TM |
2460 | if (!nfs4_has_session(clp)) |
2461 | return 0; | |
8aafd2fd TM |
2462 | status = nfs4_begin_drain_session(clp); |
2463 | if (status != 0) | |
2464 | return status; | |
73d8bde5 | 2465 | cred = nfs4_get_clid_cred(clp); |
848f5bda | 2466 | status = nfs4_proc_destroy_session(clp->cl_session, cred); |
c489ee29 TM |
2467 | switch (status) { |
2468 | case 0: | |
2469 | case -NFS4ERR_BADSESSION: | |
2470 | case -NFS4ERR_DEADSESSION: | |
2471 | break; | |
2472 | case -NFS4ERR_BACK_CHAN_BUSY: | |
2473 | case -NFS4ERR_DELAY: | |
2474 | set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); | |
2475 | status = 0; | |
2476 | ssleep(1); | |
2477 | goto out; | |
2478 | default: | |
f455848a | 2479 | status = nfs4_recovery_handle_error(clp, status); |
c3fad1b1 AA |
2480 | goto out; |
2481 | } | |
2482 | ||
2483 | memset(clp->cl_session->sess_id.data, 0, NFS4_MAX_SESSIONID_LEN); | |
848f5bda | 2484 | status = nfs4_proc_create_session(clp, cred); |
41f54a55 | 2485 | if (status) { |
cc0a9843 TM |
2486 | dprintk("%s: session reset failed with status %d for server %s!\n", |
2487 | __func__, status, clp->cl_hostname); | |
f2c1b510 | 2488 | status = nfs4_handle_reclaim_lease_error(clp, status); |
41f54a55 AA |
2489 | goto out; |
2490 | } | |
bda197f5 | 2491 | nfs41_finish_session_reset(clp); |
cc0a9843 TM |
2492 | dprintk("%s: session reset was successful for server %s!\n", |
2493 | __func__, clp->cl_hostname); | |
41f54a55 | 2494 | out: |
a52458b4 | 2495 | put_cred(cred); |
c3fad1b1 AA |
2496 | return status; |
2497 | } | |
76db6d95 | 2498 | |
a9e64442 WAA |
2499 | static int nfs4_bind_conn_to_session(struct nfs_client *clp) |
2500 | { | |
a52458b4 | 2501 | const struct cred *cred; |
2cf047c9 TM |
2502 | int ret; |
2503 | ||
1a47e7a6 TM |
2504 | if (!nfs4_has_session(clp)) |
2505 | return 0; | |
8aafd2fd TM |
2506 | ret = nfs4_begin_drain_session(clp); |
2507 | if (ret != 0) | |
2508 | return ret; | |
73d8bde5 | 2509 | cred = nfs4_get_clid_cred(clp); |
2cf047c9 | 2510 | ret = nfs4_proc_bind_conn_to_session(clp, cred); |
a52458b4 | 2511 | put_cred(cred); |
43ac544c | 2512 | clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); |
bf674c82 TM |
2513 | switch (ret) { |
2514 | case 0: | |
cc0a9843 TM |
2515 | dprintk("%s: bind_conn_to_session was successful for server %s!\n", |
2516 | __func__, clp->cl_hostname); | |
bf674c82 TM |
2517 | break; |
2518 | case -NFS4ERR_DELAY: | |
2519 | ssleep(1); | |
2520 | set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); | |
2521 | break; | |
2522 | default: | |
2523 | return nfs4_recovery_handle_error(clp, ret); | |
2524 | } | |
2525 | return 0; | |
a9e64442 | 2526 | } |
b5fdf841 TM |
2527 | |
2528 | static void nfs4_layoutreturn_any_run(struct nfs_client *clp) | |
2529 | { | |
2530 | int iomode = 0; | |
2531 | ||
2532 | if (test_and_clear_bit(NFS4CLNT_RECALL_ANY_LAYOUT_READ, &clp->cl_state)) | |
2533 | iomode += IOMODE_READ; | |
2534 | if (test_and_clear_bit(NFS4CLNT_RECALL_ANY_LAYOUT_RW, &clp->cl_state)) | |
2535 | iomode += IOMODE_RW; | |
2536 | /* Note: IOMODE_READ + IOMODE_RW == IOMODE_ANY */ | |
2537 | if (iomode) { | |
2538 | pnfs_layout_return_unused_byclid(clp, iomode); | |
2539 | set_bit(NFS4CLNT_RUN_MANAGER, &clp->cl_state); | |
2540 | } | |
2541 | } | |
76db6d95 | 2542 | #else /* CONFIG_NFS_V4_1 */ |
c3fad1b1 | 2543 | static int nfs4_reset_session(struct nfs_client *clp) { return 0; } |
a9e64442 WAA |
2544 | |
2545 | static int nfs4_bind_conn_to_session(struct nfs_client *clp) | |
2546 | { | |
2547 | return 0; | |
2548 | } | |
b5fdf841 TM |
2549 | |
2550 | static void nfs4_layoutreturn_any_run(struct nfs_client *clp) | |
2551 | { | |
2552 | } | |
76db6d95 AA |
2553 | #endif /* CONFIG_NFS_V4_1 */ |
2554 | ||
e005e804 | 2555 | static void nfs4_state_manager(struct nfs_client *clp) |
02860014 | 2556 | { |
02860014 | 2557 | int status = 0; |
8ed27d4f | 2558 | const char *section = "", *section_sep = ""; |
02860014 | 2559 | |
02860014 | 2560 | /* Ensure exclusive access to NFSv4 state */ |
47c2199b | 2561 | do { |
511ba52e | 2562 | trace_nfs4_state_mgr(clp); |
aeabb3c9 | 2563 | clear_bit(NFS4CLNT_RUN_MANAGER, &clp->cl_state); |
2c820d9a | 2564 | if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) { |
8ed27d4f | 2565 | section = "purge state"; |
b42353ff | 2566 | status = nfs4_purge_lease(clp); |
2a6ee6aa TM |
2567 | if (status < 0) |
2568 | goto out_error; | |
b42353ff | 2569 | continue; |
2c820d9a CL |
2570 | } |
2571 | ||
b42353ff | 2572 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) { |
8ed27d4f | 2573 | section = "lease expired"; |
b79a4a1b TM |
2574 | /* We're going to have to re-establish a clientid */ |
2575 | status = nfs4_reclaim_lease(clp); | |
2a6ee6aa | 2576 | if (status < 0) |
b79a4a1b | 2577 | goto out_error; |
b42353ff | 2578 | continue; |
e598d843 TM |
2579 | } |
2580 | ||
c3fad1b1 | 2581 | /* Initialize or reset the session */ |
1a47e7a6 | 2582 | if (test_and_clear_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state)) { |
8ed27d4f | 2583 | section = "reset session"; |
4d643d1d | 2584 | status = nfs4_reset_session(clp); |
b6d408ba TM |
2585 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
2586 | continue; | |
2587 | if (status < 0) | |
76db6d95 | 2588 | goto out_error; |
76db6d95 | 2589 | } |
b6d408ba | 2590 | |
a9e64442 WAA |
2591 | /* Send BIND_CONN_TO_SESSION */ |
2592 | if (test_and_clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION, | |
1a47e7a6 | 2593 | &clp->cl_state)) { |
8ed27d4f | 2594 | section = "bind conn to session"; |
a9e64442 WAA |
2595 | status = nfs4_bind_conn_to_session(clp); |
2596 | if (status < 0) | |
2597 | goto out_error; | |
bf674c82 | 2598 | continue; |
a9e64442 WAA |
2599 | } |
2600 | ||
5df904ae TM |
2601 | if (test_and_clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state)) { |
2602 | section = "check lease"; | |
2603 | status = nfs4_check_lease(clp); | |
2604 | if (status < 0) | |
2605 | goto out_error; | |
8faaa6d5 | 2606 | continue; |
c9fdeb28 CL |
2607 | } |
2608 | ||
2609 | if (test_and_clear_bit(NFS4CLNT_MOVED, &clp->cl_state)) { | |
2610 | section = "migration"; | |
2611 | status = nfs4_handle_migration(clp); | |
2612 | if (status < 0) | |
2613 | goto out_error; | |
5df904ae TM |
2614 | } |
2615 | ||
b7f7a66e CL |
2616 | if (test_and_clear_bit(NFS4CLNT_LEASE_MOVED, &clp->cl_state)) { |
2617 | section = "lease moved"; | |
2618 | status = nfs4_handle_lease_moved(clp); | |
2619 | if (status < 0) | |
2620 | goto out_error; | |
2621 | } | |
2622 | ||
b79a4a1b | 2623 | /* First recover reboot state... */ |
e345e88a | 2624 | if (test_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) { |
8ed27d4f | 2625 | section = "reclaim reboot"; |
591d71cb | 2626 | status = nfs4_do_reclaim(clp, |
c48f4f35 | 2627 | clp->cl_mvops->reboot_recovery_ops); |
df817ba3 | 2628 | if (status == -EAGAIN) |
b6d408ba TM |
2629 | continue; |
2630 | if (status < 0) | |
2631 | goto out_error; | |
df817ba3 | 2632 | nfs4_state_end_reclaim_reboot(clp); |
02860014 TM |
2633 | } |
2634 | ||
45870d69 TM |
2635 | /* Detect expired delegations... */ |
2636 | if (test_and_clear_bit(NFS4CLNT_DELEGATION_EXPIRED, &clp->cl_state)) { | |
2637 | section = "detect expired delegations"; | |
2638 | nfs_reap_expired_delegations(clp); | |
2639 | continue; | |
2640 | } | |
2641 | ||
b79a4a1b | 2642 | /* Now recover expired state... */ |
67e7b52d | 2643 | if (test_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) { |
8ed27d4f | 2644 | section = "reclaim nograce"; |
591d71cb | 2645 | status = nfs4_do_reclaim(clp, |
c48f4f35 | 2646 | clp->cl_mvops->nograce_recovery_ops); |
df817ba3 | 2647 | if (status == -EAGAIN) |
b6d408ba TM |
2648 | continue; |
2649 | if (status < 0) | |
b79a4a1b | 2650 | goto out_error; |
67e7b52d | 2651 | clear_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state); |
1da177e4 | 2652 | } |
707fb4b3 | 2653 | |
5601a00d | 2654 | nfs4_end_drain_session(clp); |
aeabb3c9 TM |
2655 | nfs4_clear_state_manager_bit(clp); |
2656 | ||
b5fdf841 | 2657 | if (!test_and_set_bit(NFS4CLNT_RECALL_RUNNING, &clp->cl_state)) { |
aeabb3c9 TM |
2658 | if (test_and_clear_bit(NFS4CLNT_DELEGRETURN, &clp->cl_state)) { |
2659 | nfs_client_return_marked_delegations(clp); | |
2660 | set_bit(NFS4CLNT_RUN_MANAGER, &clp->cl_state); | |
2661 | } | |
b5fdf841 TM |
2662 | nfs4_layoutreturn_any_run(clp); |
2663 | clear_bit(NFS4CLNT_RECALL_RUNNING, &clp->cl_state); | |
707fb4b3 | 2664 | } |
e005e804 | 2665 | |
f3c76491 | 2666 | /* Did we race with an attempt to give us more work? */ |
aeabb3c9 | 2667 | if (!test_bit(NFS4CLNT_RUN_MANAGER, &clp->cl_state)) |
21a446cf | 2668 | return; |
f3c76491 | 2669 | if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) != 0) |
21a446cf | 2670 | return; |
a1aa09be | 2671 | } while (refcount_read(&clp->cl_count) > 1 && !signalled()); |
21a446cf TM |
2672 | goto out_drain; |
2673 | ||
1da177e4 | 2674 | out_error: |
8ed27d4f WAA |
2675 | if (strlen(section)) |
2676 | section_sep = ": "; | |
511ba52e | 2677 | trace_nfs4_state_mgr_failed(clp, section, status); |
8ed27d4f WAA |
2678 | pr_warn_ratelimited("NFS: state manager%s%s failed on NFSv4 server %s" |
2679 | " with error %d\n", section_sep, section, | |
2680 | clp->cl_hostname, -status); | |
ffe5a830 | 2681 | ssleep(1); |
21a446cf | 2682 | out_drain: |
5601a00d | 2683 | nfs4_end_drain_session(clp); |
e005e804 TM |
2684 | nfs4_clear_state_manager_bit(clp); |
2685 | } | |
2686 | ||
2687 | static int nfs4_run_state_manager(void *ptr) | |
2688 | { | |
2689 | struct nfs_client *clp = ptr; | |
2690 | ||
2691 | allow_signal(SIGKILL); | |
2692 | nfs4_state_manager(clp); | |
2693 | nfs_put_client(clp); | |
2694 | module_put_and_exit(0); | |
2695 | return 0; | |
1da177e4 LT |
2696 | } |
2697 | ||
2698 | /* | |
2699 | * Local variables: | |
2700 | * c-basic-offset: 8 | |
2701 | * End: | |
2702 | */ |