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> |
3e17898a | 52 | #include <linux/sched/mm.h> |
1da177e4 | 53 | |
05f4c350 CL |
54 | #include <linux/sunrpc/clnt.h> |
55 | ||
4ce79717 | 56 | #include "nfs4_fs.h" |
1da177e4 LT |
57 | #include "callback.h" |
58 | #include "delegation.h" | |
24c8dbbb | 59 | #include "internal.h" |
40c64c26 | 60 | #include "nfs4idmap.h" |
76e697ba | 61 | #include "nfs4session.h" |
974cec8c | 62 | #include "pnfs.h" |
bbe0a3aa | 63 | #include "netns.h" |
511ba52e | 64 | #include "nfs4trace.h" |
1da177e4 | 65 | |
e3c0fb7e CL |
66 | #define NFSDBG_FACILITY NFSDBG_STATE |
67 | ||
1da177e4 LT |
68 | #define OPENOWNER_POOL_SIZE 8 |
69 | ||
40882deb TM |
70 | static void nfs4_state_start_reclaim_reboot(struct nfs_client *clp); |
71 | ||
93b717fd | 72 | const nfs4_stateid zero_stateid = { |
e0714ec4 | 73 | { .data = { 0 } }, |
93b717fd TM |
74 | .type = NFS4_SPECIAL_STATEID_TYPE, |
75 | }; | |
fcd8843c TM |
76 | const nfs4_stateid invalid_stateid = { |
77 | { | |
445f288d TM |
78 | /* Funky initialiser keeps older gcc versions happy */ |
79 | .data = { 0xff, 0xff, 0xff, 0xff, 0 }, | |
fcd8843c TM |
80 | }, |
81 | .type = NFS4_INVALID_STATEID_TYPE, | |
82 | }; | |
83 | ||
2409a976 FI |
84 | const nfs4_stateid current_stateid = { |
85 | { | |
86 | /* Funky initialiser keeps older gcc versions happy */ | |
87 | .data = { 0x0, 0x0, 0x0, 0x1, 0 }, | |
88 | }, | |
89 | .type = NFS4_SPECIAL_STATEID_TYPE, | |
90 | }; | |
91 | ||
05f4c350 | 92 | static DEFINE_MUTEX(nfs_clid_init_mutex); |
1da177e4 | 93 | |
5b596830 DB |
94 | static int nfs4_setup_state_renewal(struct nfs_client *clp) |
95 | { | |
96 | int status; | |
97 | struct nfs_fsinfo fsinfo; | |
5b596830 DB |
98 | |
99 | if (!test_bit(NFS_CS_CHECK_LEASE_TIME, &clp->cl_res_state)) { | |
100 | nfs4_schedule_state_renewal(clp); | |
101 | return 0; | |
102 | } | |
103 | ||
5b596830 DB |
104 | status = nfs4_proc_get_lease_time(clp, &fsinfo); |
105 | if (status == 0) { | |
7dc2993a | 106 | nfs4_set_lease_period(clp, fsinfo.lease_time * HZ); |
5b596830 DB |
107 | nfs4_schedule_state_renewal(clp); |
108 | } | |
109 | ||
110 | return status; | |
111 | } | |
112 | ||
a52458b4 | 113 | int nfs4_init_clientid(struct nfs_client *clp, const struct cred *cred) |
1da177e4 | 114 | { |
fd954ae1 TM |
115 | struct nfs4_setclientid_res clid = { |
116 | .clientid = clp->cl_clientid, | |
117 | .confirm = clp->cl_confirm, | |
118 | }; | |
f738f517 CL |
119 | unsigned short port; |
120 | int status; | |
bbe0a3aa | 121 | struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); |
f738f517 | 122 | |
fd954ae1 TM |
123 | if (test_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state)) |
124 | goto do_confirm; | |
bbe0a3aa | 125 | port = nn->nfs_callback_tcpport; |
f738f517 | 126 | if (clp->cl_addr.ss_family == AF_INET6) |
29dcc16a | 127 | port = nn->nfs_callback_tcpport6; |
f738f517 | 128 | |
bb8b27e5 TM |
129 | status = nfs4_proc_setclientid(clp, NFS4_CALLBACK, port, cred, &clid); |
130 | if (status != 0) | |
131 | goto out; | |
fd954ae1 TM |
132 | clp->cl_clientid = clid.clientid; |
133 | clp->cl_confirm = clid.confirm; | |
134 | set_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); | |
135 | do_confirm: | |
bb8b27e5 TM |
136 | status = nfs4_proc_setclientid_confirm(clp, &clid, cred); |
137 | if (status != 0) | |
138 | goto out; | |
fd954ae1 | 139 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
5b596830 | 140 | nfs4_setup_state_renewal(clp); |
bb8b27e5 | 141 | out: |
1da177e4 LT |
142 | return status; |
143 | } | |
144 | ||
05f4c350 CL |
145 | /** |
146 | * nfs40_discover_server_trunking - Detect server IP address trunking (mv0) | |
147 | * | |
148 | * @clp: nfs_client under test | |
149 | * @result: OUT: found nfs_client, or clp | |
150 | * @cred: credential to use for trunking test | |
151 | * | |
152 | * Returns zero, a negative errno, or a negative NFS4ERR status. | |
153 | * If zero is returned, an nfs_client pointer is planted in | |
154 | * "result". | |
155 | * | |
156 | * Note: The returned client may not yet be marked ready. | |
157 | */ | |
158 | int nfs40_discover_server_trunking(struct nfs_client *clp, | |
159 | struct nfs_client **result, | |
a52458b4 | 160 | const struct cred *cred) |
05f4c350 CL |
161 | { |
162 | struct nfs4_setclientid_res clid = { | |
163 | .clientid = clp->cl_clientid, | |
164 | .confirm = clp->cl_confirm, | |
165 | }; | |
9f62387d | 166 | struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); |
05f4c350 CL |
167 | unsigned short port; |
168 | int status; | |
169 | ||
9f62387d | 170 | port = nn->nfs_callback_tcpport; |
05f4c350 | 171 | if (clp->cl_addr.ss_family == AF_INET6) |
9f62387d | 172 | port = nn->nfs_callback_tcpport6; |
05f4c350 CL |
173 | |
174 | status = nfs4_proc_setclientid(clp, NFS4_CALLBACK, port, cred, &clid); | |
175 | if (status != 0) | |
176 | goto out; | |
177 | clp->cl_clientid = clid.clientid; | |
178 | clp->cl_confirm = clid.confirm; | |
179 | ||
180 | status = nfs40_walk_client_list(clp, result, cred); | |
202c312d | 181 | if (status == 0) { |
05f4c350 CL |
182 | /* Sustain the lease, even if it's empty. If the clientid4 |
183 | * goes stale it's of no use for trunking discovery. */ | |
184 | nfs4_schedule_state_renewal(*result); | |
f02f3755 Z |
185 | |
186 | /* If the client state need to recover, do it. */ | |
187 | if (clp->cl_state) | |
188 | nfs4_schedule_state_manager(clp); | |
05f4c350 | 189 | } |
05f4c350 CL |
190 | out: |
191 | return status; | |
192 | } | |
193 | ||
a52458b4 | 194 | const struct cred *nfs4_get_machine_cred(struct nfs_client *clp) |
a2b2bb88 | 195 | { |
a52458b4 | 196 | return get_cred(rpc_machine_cred()); |
a2b2bb88 TM |
197 | } |
198 | ||
d688f7b8 CL |
199 | static void nfs4_root_machine_cred(struct nfs_client *clp) |
200 | { | |
d688f7b8 | 201 | |
5e16923b N |
202 | /* Force root creds instead of machine */ |
203 | clp->cl_principal = NULL; | |
204 | clp->cl_rpcclient->cl_principal = NULL; | |
d688f7b8 CL |
205 | } |
206 | ||
a52458b4 | 207 | static const struct cred * |
24d292b8 | 208 | nfs4_get_renew_cred_server_locked(struct nfs_server *server) |
b4454fe1 | 209 | { |
a52458b4 | 210 | const struct cred *cred = NULL; |
b4454fe1 | 211 | struct nfs4_state_owner *sp; |
9f958ab8 | 212 | struct rb_node *pos; |
b4454fe1 | 213 | |
24d292b8 CL |
214 | for (pos = rb_first(&server->state_owners); |
215 | pos != NULL; | |
216 | pos = rb_next(pos)) { | |
217 | sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); | |
b4454fe1 TM |
218 | if (list_empty(&sp->so_states)) |
219 | continue; | |
a52458b4 | 220 | cred = get_cred(sp->so_cred); |
b4454fe1 TM |
221 | break; |
222 | } | |
223 | return cred; | |
224 | } | |
225 | ||
24d292b8 | 226 | /** |
f15e1e8b | 227 | * nfs4_get_renew_cred - Acquire credential for a renew operation |
24d292b8 CL |
228 | * @clp: client state handle |
229 | * | |
230 | * Returns an rpc_cred with reference count bumped, or NULL. | |
231 | * Caller must hold clp->cl_lock. | |
232 | */ | |
a52458b4 | 233 | const struct cred *nfs4_get_renew_cred(struct nfs_client *clp) |
24d292b8 | 234 | { |
a52458b4 | 235 | const struct cred *cred = NULL; |
24d292b8 CL |
236 | struct nfs_server *server; |
237 | ||
e49a29bd | 238 | /* Use machine credentials if available */ |
f15e1e8b | 239 | cred = nfs4_get_machine_cred(clp); |
e49a29bd SP |
240 | if (cred != NULL) |
241 | goto out; | |
242 | ||
f15e1e8b | 243 | spin_lock(&clp->cl_lock); |
24d292b8 CL |
244 | rcu_read_lock(); |
245 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { | |
246 | cred = nfs4_get_renew_cred_server_locked(server); | |
247 | if (cred != NULL) | |
248 | break; | |
249 | } | |
250 | rcu_read_unlock(); | |
f15e1e8b | 251 | spin_unlock(&clp->cl_lock); |
e49a29bd SP |
252 | |
253 | out: | |
24d292b8 CL |
254 | return cred; |
255 | } | |
256 | ||
62f288a0 | 257 | static void nfs4_end_drain_slot_table(struct nfs4_slot_table *tbl) |
9dfdf404 | 258 | { |
774d5f14 | 259 | if (test_and_clear_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state)) { |
961a828d | 260 | spin_lock(&tbl->slot_tbl_lock); |
b75ad4cd | 261 | nfs41_wake_slot_table(tbl); |
961a828d | 262 | spin_unlock(&tbl->slot_tbl_lock); |
689cf5c1 | 263 | } |
9dfdf404 RL |
264 | } |
265 | ||
62f288a0 AA |
266 | static void nfs4_end_drain_session(struct nfs_client *clp) |
267 | { | |
268 | struct nfs4_session *ses = clp->cl_session; | |
269 | ||
2cf8bca8 CL |
270 | if (clp->cl_slot_tbl) { |
271 | nfs4_end_drain_slot_table(clp->cl_slot_tbl); | |
272 | return; | |
273 | } | |
274 | ||
62f288a0 AA |
275 | if (ses != NULL) { |
276 | nfs4_end_drain_slot_table(&ses->bc_slot_table); | |
277 | nfs4_end_drain_slot_table(&ses->fc_slot_table); | |
278 | } | |
279 | } | |
280 | ||
774d5f14 | 281 | static int nfs4_drain_slot_tbl(struct nfs4_slot_table *tbl) |
9dfdf404 | 282 | { |
774d5f14 | 283 | set_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state); |
9dfdf404 | 284 | spin_lock(&tbl->slot_tbl_lock); |
b6bf6e7d | 285 | if (tbl->highest_used_slotid != NFS4_NO_SLOT) { |
16735d02 | 286 | reinit_completion(&tbl->complete); |
9dfdf404 | 287 | spin_unlock(&tbl->slot_tbl_lock); |
42acd021 | 288 | return wait_for_completion_interruptible(&tbl->complete); |
9dfdf404 RL |
289 | } |
290 | spin_unlock(&tbl->slot_tbl_lock); | |
291 | return 0; | |
292 | } | |
293 | ||
42acd021 AA |
294 | static int nfs4_begin_drain_session(struct nfs_client *clp) |
295 | { | |
296 | struct nfs4_session *ses = clp->cl_session; | |
8aafd2fd | 297 | int ret; |
42acd021 | 298 | |
2cf8bca8 CL |
299 | if (clp->cl_slot_tbl) |
300 | return nfs4_drain_slot_tbl(clp->cl_slot_tbl); | |
301 | ||
42acd021 | 302 | /* back channel */ |
774d5f14 | 303 | ret = nfs4_drain_slot_tbl(&ses->bc_slot_table); |
42acd021 AA |
304 | if (ret) |
305 | return ret; | |
306 | /* fore channel */ | |
774d5f14 | 307 | return nfs4_drain_slot_tbl(&ses->fc_slot_table); |
42acd021 AA |
308 | } |
309 | ||
c9fdeb28 CL |
310 | #if defined(CONFIG_NFS_V4_1) |
311 | ||
bda197f5 TM |
312 | static void nfs41_finish_session_reset(struct nfs_client *clp) |
313 | { | |
314 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); | |
315 | clear_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); | |
316 | /* create_session negotiated new slot table */ | |
bda197f5 | 317 | clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); |
ea51efaa | 318 | nfs4_setup_state_renewal(clp); |
bda197f5 TM |
319 | } |
320 | ||
a52458b4 | 321 | int nfs41_init_clientid(struct nfs_client *clp, const struct cred *cred) |
4d643d1d AA |
322 | { |
323 | int status; | |
324 | ||
fd954ae1 TM |
325 | if (test_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state)) |
326 | goto do_confirm; | |
4d643d1d | 327 | status = nfs4_proc_exchange_id(clp, cred); |
9430fb6b RL |
328 | if (status != 0) |
329 | goto out; | |
fd954ae1 TM |
330 | set_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
331 | do_confirm: | |
848f5bda | 332 | status = nfs4_proc_create_session(clp, cred); |
9430fb6b RL |
333 | if (status != 0) |
334 | goto out; | |
40882deb TM |
335 | if (!(clp->cl_exchange_flags & EXCHGID4_FLAG_CONFIRMED_R)) |
336 | nfs4_state_start_reclaim_reboot(clp); | |
bda197f5 | 337 | nfs41_finish_session_reset(clp); |
9430fb6b RL |
338 | nfs_mark_client_ready(clp, NFS_CS_READY); |
339 | out: | |
4d643d1d AA |
340 | return status; |
341 | } | |
342 | ||
05f4c350 CL |
343 | /** |
344 | * nfs41_discover_server_trunking - Detect server IP address trunking (mv1) | |
345 | * | |
346 | * @clp: nfs_client under test | |
347 | * @result: OUT: found nfs_client, or clp | |
348 | * @cred: credential to use for trunking test | |
349 | * | |
350 | * Returns NFS4_OK, a negative errno, or a negative NFS4ERR status. | |
351 | * If NFS4_OK is returned, an nfs_client pointer is planted in | |
352 | * "result". | |
353 | * | |
354 | * Note: The returned client may not yet be marked ready. | |
355 | */ | |
356 | int nfs41_discover_server_trunking(struct nfs_client *clp, | |
357 | struct nfs_client **result, | |
a52458b4 | 358 | const struct cred *cred) |
05f4c350 CL |
359 | { |
360 | int status; | |
361 | ||
362 | status = nfs4_proc_exchange_id(clp, cred); | |
363 | if (status != NFS4_OK) | |
364 | return status; | |
365 | ||
48d66b97 TM |
366 | status = nfs41_walk_client_list(clp, result, cred); |
367 | if (status < 0) | |
368 | return status; | |
369 | if (clp != *result) | |
370 | return 0; | |
371 | ||
8dcbec6d CL |
372 | /* |
373 | * Purge state if the client id was established in a prior | |
374 | * instance and the client id could not have arrived on the | |
375 | * server via Transparent State Migration. | |
376 | */ | |
377 | if (clp->cl_exchange_flags & EXCHGID4_FLAG_CONFIRMED_R) { | |
378 | if (!test_bit(NFS_CS_TSM_POSSIBLE, &clp->cl_flags)) | |
379 | set_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state); | |
380 | else | |
381 | set_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); | |
382 | } | |
48d66b97 TM |
383 | nfs4_schedule_state_manager(clp); |
384 | status = nfs_wait_client_init_complete(clp); | |
385 | if (status < 0) | |
386 | nfs_put_client(clp); | |
387 | return status; | |
05f4c350 CL |
388 | } |
389 | ||
b4b82607 AA |
390 | #endif /* CONFIG_NFS_V4_1 */ |
391 | ||
24d292b8 | 392 | /** |
73d8bde5 | 393 | * nfs4_get_clid_cred - Acquire credential for a setclientid operation |
24d292b8 CL |
394 | * @clp: client state handle |
395 | * | |
a52458b4 | 396 | * Returns a cred with reference count bumped, or NULL. |
24d292b8 | 397 | */ |
a52458b4 | 398 | const struct cred *nfs4_get_clid_cred(struct nfs_client *clp) |
24d292b8 | 399 | { |
a52458b4 | 400 | const struct cred *cred; |
286d7d6a | 401 | |
f15e1e8b | 402 | cred = nfs4_get_machine_cred(clp); |
a2b2bb88 | 403 | return cred; |
286d7d6a TM |
404 | } |
405 | ||
1da177e4 | 406 | static struct nfs4_state_owner * |
a52458b4 | 407 | nfs4_find_state_owner_locked(struct nfs_server *server, const struct cred *cred) |
1da177e4 | 408 | { |
24d292b8 | 409 | struct rb_node **p = &server->state_owners.rb_node, |
9f958ab8 | 410 | *parent = NULL; |
414adf14 | 411 | struct nfs4_state_owner *sp; |
a52458b4 | 412 | int cmp; |
1da177e4 | 413 | |
9f958ab8 TM |
414 | while (*p != NULL) { |
415 | parent = *p; | |
24d292b8 | 416 | sp = rb_entry(parent, struct nfs4_state_owner, so_server_node); |
a52458b4 | 417 | cmp = cred_fscmp(cred, sp->so_cred); |
9f958ab8 | 418 | |
a52458b4 | 419 | if (cmp < 0) |
9f958ab8 | 420 | p = &parent->rb_left; |
a52458b4 | 421 | else if (cmp > 0) |
9f958ab8 TM |
422 | p = &parent->rb_right; |
423 | else { | |
0aaaf5c4 CL |
424 | if (!list_empty(&sp->so_lru)) |
425 | list_del_init(&sp->so_lru); | |
9f958ab8 | 426 | atomic_inc(&sp->so_count); |
414adf14 | 427 | return sp; |
9f958ab8 | 428 | } |
1da177e4 | 429 | } |
414adf14 | 430 | return NULL; |
1da177e4 LT |
431 | } |
432 | ||
9f958ab8 | 433 | static struct nfs4_state_owner * |
24d292b8 | 434 | nfs4_insert_state_owner_locked(struct nfs4_state_owner *new) |
9f958ab8 | 435 | { |
24d292b8 CL |
436 | struct nfs_server *server = new->so_server; |
437 | struct rb_node **p = &server->state_owners.rb_node, | |
9f958ab8 TM |
438 | *parent = NULL; |
439 | struct nfs4_state_owner *sp; | |
a52458b4 | 440 | int cmp; |
9f958ab8 TM |
441 | |
442 | while (*p != NULL) { | |
443 | parent = *p; | |
24d292b8 | 444 | sp = rb_entry(parent, struct nfs4_state_owner, so_server_node); |
a52458b4 | 445 | cmp = cred_fscmp(new->so_cred, sp->so_cred); |
9f958ab8 | 446 | |
a52458b4 | 447 | if (cmp < 0) |
9f958ab8 | 448 | p = &parent->rb_left; |
a52458b4 | 449 | else if (cmp > 0) |
9f958ab8 TM |
450 | p = &parent->rb_right; |
451 | else { | |
0aaaf5c4 CL |
452 | if (!list_empty(&sp->so_lru)) |
453 | list_del_init(&sp->so_lru); | |
9f958ab8 TM |
454 | atomic_inc(&sp->so_count); |
455 | return sp; | |
456 | } | |
457 | } | |
24d292b8 CL |
458 | rb_link_node(&new->so_server_node, parent, p); |
459 | rb_insert_color(&new->so_server_node, &server->state_owners); | |
9f958ab8 TM |
460 | return new; |
461 | } | |
462 | ||
463 | static void | |
24d292b8 | 464 | nfs4_remove_state_owner_locked(struct nfs4_state_owner *sp) |
9f958ab8 | 465 | { |
24d292b8 CL |
466 | struct nfs_server *server = sp->so_server; |
467 | ||
468 | if (!RB_EMPTY_NODE(&sp->so_server_node)) | |
469 | rb_erase(&sp->so_server_node, &server->state_owners); | |
9f958ab8 TM |
470 | } |
471 | ||
7ba127ab TM |
472 | static void |
473 | nfs4_init_seqid_counter(struct nfs_seqid_counter *sc) | |
474 | { | |
95b72eb0 | 475 | sc->create_time = ktime_get(); |
7ba127ab TM |
476 | sc->flags = 0; |
477 | sc->counter = 0; | |
478 | spin_lock_init(&sc->lock); | |
479 | INIT_LIST_HEAD(&sc->list); | |
480 | rpc_init_wait_queue(&sc->wait, "Seqid_waitqueue"); | |
481 | } | |
482 | ||
483 | static void | |
484 | nfs4_destroy_seqid_counter(struct nfs_seqid_counter *sc) | |
485 | { | |
486 | rpc_destroy_wait_queue(&sc->wait); | |
487 | } | |
488 | ||
1da177e4 LT |
489 | /* |
490 | * nfs4_alloc_state_owner(): this is called on the OPEN or CREATE path to | |
491 | * create a new state_owner. | |
492 | * | |
493 | */ | |
494 | static struct nfs4_state_owner * | |
d1e284d5 | 495 | nfs4_alloc_state_owner(struct nfs_server *server, |
a52458b4 | 496 | const struct cred *cred, |
d1e284d5 | 497 | gfp_t gfp_flags) |
1da177e4 LT |
498 | { |
499 | struct nfs4_state_owner *sp; | |
500 | ||
d1e284d5 | 501 | sp = kzalloc(sizeof(*sp), gfp_flags); |
1da177e4 LT |
502 | if (!sp) |
503 | return NULL; | |
724e2df9 | 504 | sp->so_seqid.owner_id = ida_alloc(&server->openowner_id, gfp_flags); |
aae5730e MW |
505 | if (sp->so_seqid.owner_id < 0) { |
506 | kfree(sp); | |
507 | return NULL; | |
508 | } | |
d1e284d5 | 509 | sp->so_server = server; |
a52458b4 | 510 | sp->so_cred = get_cred(cred); |
ec073428 | 511 | spin_lock_init(&sp->so_lock); |
1da177e4 | 512 | INIT_LIST_HEAD(&sp->so_states); |
7ba127ab | 513 | nfs4_init_seqid_counter(&sp->so_seqid); |
1da177e4 | 514 | atomic_set(&sp->so_count, 1); |
0aaaf5c4 | 515 | INIT_LIST_HEAD(&sp->so_lru); |
76246c92 | 516 | seqcount_spinlock_init(&sp->so_reclaim_seqcount, &sp->so_lock); |
65b62a29 | 517 | mutex_init(&sp->so_delegreturn_mutex); |
1da177e4 LT |
518 | return sp; |
519 | } | |
520 | ||
1d2e88e7 | 521 | static void |
86cfb041 | 522 | nfs4_reset_state_owner(struct nfs4_state_owner *sp) |
1da177e4 | 523 | { |
86cfb041 N |
524 | /* This state_owner is no longer usable, but must |
525 | * remain in place so that state recovery can find it | |
526 | * and the opens associated with it. | |
527 | * It may also be used for new 'open' request to | |
528 | * return a delegation to the server. | |
529 | * So update the 'create_time' so that it looks like | |
530 | * a new state_owner. This will cause the server to | |
531 | * request an OPEN_CONFIRM to start a new sequence. | |
532 | */ | |
533 | sp->so_seqid.create_time = ktime_get(); | |
1da177e4 LT |
534 | } |
535 | ||
0aaaf5c4 CL |
536 | static void nfs4_free_state_owner(struct nfs4_state_owner *sp) |
537 | { | |
7ba127ab | 538 | nfs4_destroy_seqid_counter(&sp->so_seqid); |
a52458b4 | 539 | put_cred(sp->so_cred); |
724e2df9 | 540 | ida_free(&sp->so_server->openowner_id, sp->so_seqid.owner_id); |
0aaaf5c4 CL |
541 | kfree(sp); |
542 | } | |
543 | ||
544 | static void nfs4_gc_state_owners(struct nfs_server *server) | |
545 | { | |
546 | struct nfs_client *clp = server->nfs_client; | |
547 | struct nfs4_state_owner *sp, *tmp; | |
548 | unsigned long time_min, time_max; | |
549 | LIST_HEAD(doomed); | |
550 | ||
551 | spin_lock(&clp->cl_lock); | |
552 | time_max = jiffies; | |
553 | time_min = (long)time_max - (long)clp->cl_lease_time; | |
554 | list_for_each_entry_safe(sp, tmp, &server->state_owners_lru, so_lru) { | |
555 | /* NB: LRU is sorted so that oldest is at the head */ | |
556 | if (time_in_range(sp->so_expires, time_min, time_max)) | |
557 | break; | |
558 | list_move(&sp->so_lru, &doomed); | |
559 | nfs4_remove_state_owner_locked(sp); | |
560 | } | |
561 | spin_unlock(&clp->cl_lock); | |
562 | ||
563 | list_for_each_entry_safe(sp, tmp, &doomed, so_lru) { | |
564 | list_del(&sp->so_lru); | |
565 | nfs4_free_state_owner(sp); | |
566 | } | |
567 | } | |
568 | ||
24d292b8 CL |
569 | /** |
570 | * nfs4_get_state_owner - Look up a state owner given a credential | |
571 | * @server: nfs_server to search | |
572 | * @cred: RPC credential to match | |
302fad7b | 573 | * @gfp_flags: allocation mode |
24d292b8 CL |
574 | * |
575 | * Returns a pointer to an instantiated nfs4_state_owner struct, or NULL. | |
576 | */ | |
577 | struct nfs4_state_owner *nfs4_get_state_owner(struct nfs_server *server, | |
a52458b4 | 578 | const struct cred *cred, |
d1e284d5 | 579 | gfp_t gfp_flags) |
1da177e4 | 580 | { |
7539bbab | 581 | struct nfs_client *clp = server->nfs_client; |
1da177e4 LT |
582 | struct nfs4_state_owner *sp, *new; |
583 | ||
1da177e4 | 584 | spin_lock(&clp->cl_lock); |
24d292b8 | 585 | sp = nfs4_find_state_owner_locked(server, cred); |
1da177e4 | 586 | spin_unlock(&clp->cl_lock); |
1da177e4 | 587 | if (sp != NULL) |
0aaaf5c4 | 588 | goto out; |
d1e284d5 | 589 | new = nfs4_alloc_state_owner(server, cred, gfp_flags); |
9f958ab8 | 590 | if (new == NULL) |
0aaaf5c4 | 591 | goto out; |
aae5730e MW |
592 | spin_lock(&clp->cl_lock); |
593 | sp = nfs4_insert_state_owner_locked(new); | |
594 | spin_unlock(&clp->cl_lock); | |
d1e284d5 TM |
595 | if (sp != new) |
596 | nfs4_free_state_owner(new); | |
0aaaf5c4 CL |
597 | out: |
598 | nfs4_gc_state_owners(server); | |
9f958ab8 | 599 | return sp; |
1da177e4 LT |
600 | } |
601 | ||
24d292b8 CL |
602 | /** |
603 | * nfs4_put_state_owner - Release a nfs4_state_owner | |
604 | * @sp: state owner data to release | |
7bf97bc2 TM |
605 | * |
606 | * Note that we keep released state owners on an LRU | |
607 | * list. | |
608 | * This caches valid state owners so that they can be | |
609 | * reused, to avoid the OPEN_CONFIRM on minor version 0. | |
610 | * It also pins the uniquifier of dropped state owners for | |
611 | * a while, to ensure that those state owner names are | |
612 | * never reused. | |
24d292b8 | 613 | */ |
1da177e4 LT |
614 | void nfs4_put_state_owner(struct nfs4_state_owner *sp) |
615 | { | |
0aaaf5c4 CL |
616 | struct nfs_server *server = sp->so_server; |
617 | struct nfs_client *clp = server->nfs_client; | |
1da177e4 LT |
618 | |
619 | if (!atomic_dec_and_lock(&sp->so_count, &clp->cl_lock)) | |
620 | return; | |
0aaaf5c4 | 621 | |
7bf97bc2 TM |
622 | sp->so_expires = jiffies; |
623 | list_add_tail(&sp->so_lru, &server->state_owners_lru); | |
624 | spin_unlock(&clp->cl_lock); | |
0aaaf5c4 CL |
625 | } |
626 | ||
627 | /** | |
628 | * nfs4_purge_state_owners - Release all cached state owners | |
629 | * @server: nfs_server with cached state owners to release | |
c77e2283 | 630 | * @head: resulting list of state owners |
0aaaf5c4 CL |
631 | * |
632 | * Called at umount time. Remaining state owners will be on | |
633 | * the LRU with ref count of zero. | |
c77e2283 TM |
634 | * Note that the state owners are not freed, but are added |
635 | * to the list @head, which can later be used as an argument | |
636 | * to nfs4_free_state_owners. | |
0aaaf5c4 | 637 | */ |
c77e2283 | 638 | void nfs4_purge_state_owners(struct nfs_server *server, struct list_head *head) |
0aaaf5c4 CL |
639 | { |
640 | struct nfs_client *clp = server->nfs_client; | |
641 | struct nfs4_state_owner *sp, *tmp; | |
0aaaf5c4 CL |
642 | |
643 | spin_lock(&clp->cl_lock); | |
644 | list_for_each_entry_safe(sp, tmp, &server->state_owners_lru, so_lru) { | |
c77e2283 | 645 | list_move(&sp->so_lru, head); |
0aaaf5c4 CL |
646 | nfs4_remove_state_owner_locked(sp); |
647 | } | |
1da177e4 | 648 | spin_unlock(&clp->cl_lock); |
c77e2283 | 649 | } |
0aaaf5c4 | 650 | |
c77e2283 | 651 | /** |
6453bcd0 | 652 | * nfs4_free_state_owners - Release all cached state owners |
c77e2283 TM |
653 | * @head: resulting list of state owners |
654 | * | |
655 | * Frees a list of state owners that was generated by | |
656 | * nfs4_purge_state_owners | |
657 | */ | |
658 | void nfs4_free_state_owners(struct list_head *head) | |
659 | { | |
660 | struct nfs4_state_owner *sp, *tmp; | |
661 | ||
662 | list_for_each_entry_safe(sp, tmp, head, so_lru) { | |
0aaaf5c4 CL |
663 | list_del(&sp->so_lru); |
664 | nfs4_free_state_owner(sp); | |
665 | } | |
1da177e4 LT |
666 | } |
667 | ||
668 | static struct nfs4_state * | |
669 | nfs4_alloc_open_state(void) | |
670 | { | |
671 | struct nfs4_state *state; | |
672 | ||
9c00fd9a | 673 | state = kzalloc(sizeof(*state), GFP_KERNEL_ACCOUNT); |
1da177e4 LT |
674 | if (!state) |
675 | return NULL; | |
ace9fad4 | 676 | refcount_set(&state->count, 1); |
1da177e4 | 677 | INIT_LIST_HEAD(&state->lock_states); |
8d0a8a9d | 678 | spin_lock_init(&state->state_lock); |
8bda4e4c | 679 | seqlock_init(&state->seqlock); |
c9399f21 | 680 | init_waitqueue_head(&state->waitq); |
1da177e4 LT |
681 | return state; |
682 | } | |
683 | ||
4cecb76f | 684 | void |
dc0b027d | 685 | nfs4_state_set_mode_locked(struct nfs4_state *state, fmode_t fmode) |
4cecb76f | 686 | { |
dc0b027d | 687 | if (state->state == fmode) |
4cecb76f TM |
688 | return; |
689 | /* NB! List reordering - see the reclaim code for why. */ | |
dc0b027d TM |
690 | if ((fmode & FMODE_WRITE) != (state->state & FMODE_WRITE)) { |
691 | if (fmode & FMODE_WRITE) | |
4cecb76f TM |
692 | list_move(&state->open_states, &state->owner->so_states); |
693 | else | |
694 | list_move_tail(&state->open_states, &state->owner->so_states); | |
695 | } | |
dc0b027d | 696 | state->state = fmode; |
4cecb76f TM |
697 | } |
698 | ||
1da177e4 LT |
699 | static struct nfs4_state * |
700 | __nfs4_find_state_byowner(struct inode *inode, struct nfs4_state_owner *owner) | |
701 | { | |
702 | struct nfs_inode *nfsi = NFS_I(inode); | |
703 | struct nfs4_state *state; | |
704 | ||
9ae075fd | 705 | list_for_each_entry_rcu(state, &nfsi->open_states, inode_states) { |
1c816efa | 706 | if (state->owner != owner) |
1da177e4 | 707 | continue; |
5d422301 TM |
708 | if (!nfs4_valid_open_stateid(state)) |
709 | continue; | |
ace9fad4 | 710 | if (refcount_inc_not_zero(&state->count)) |
1da177e4 | 711 | return state; |
1da177e4 LT |
712 | } |
713 | return NULL; | |
714 | } | |
715 | ||
1da177e4 LT |
716 | static void |
717 | nfs4_free_open_state(struct nfs4_state *state) | |
718 | { | |
9ae075fd | 719 | kfree_rcu(state, rcu_head); |
1da177e4 LT |
720 | } |
721 | ||
722 | struct nfs4_state * | |
723 | nfs4_get_open_state(struct inode *inode, struct nfs4_state_owner *owner) | |
724 | { | |
725 | struct nfs4_state *state, *new; | |
726 | struct nfs_inode *nfsi = NFS_I(inode); | |
727 | ||
9ae075fd | 728 | rcu_read_lock(); |
1da177e4 | 729 | state = __nfs4_find_state_byowner(inode, owner); |
9ae075fd | 730 | rcu_read_unlock(); |
1da177e4 LT |
731 | if (state) |
732 | goto out; | |
733 | new = nfs4_alloc_open_state(); | |
ec073428 | 734 | spin_lock(&owner->so_lock); |
1da177e4 LT |
735 | spin_lock(&inode->i_lock); |
736 | state = __nfs4_find_state_byowner(inode, owner); | |
737 | if (state == NULL && new != NULL) { | |
738 | state = new; | |
1da177e4 LT |
739 | state->owner = owner; |
740 | atomic_inc(&owner->so_count); | |
0444d76a DC |
741 | ihold(inode); |
742 | state->inode = inode; | |
29fe8399 | 743 | list_add_rcu(&state->inode_states, &nfsi->open_states); |
1da177e4 | 744 | spin_unlock(&inode->i_lock); |
ec073428 TM |
745 | /* Note: The reclaim code dictates that we add stateless |
746 | * and read-only stateids to the end of the list */ | |
747 | list_add_tail(&state->open_states, &owner->so_states); | |
748 | spin_unlock(&owner->so_lock); | |
1da177e4 LT |
749 | } else { |
750 | spin_unlock(&inode->i_lock); | |
ec073428 | 751 | spin_unlock(&owner->so_lock); |
1da177e4 LT |
752 | if (new) |
753 | nfs4_free_open_state(new); | |
754 | } | |
755 | out: | |
756 | return state; | |
757 | } | |
758 | ||
1da177e4 LT |
759 | void nfs4_put_open_state(struct nfs4_state *state) |
760 | { | |
761 | struct inode *inode = state->inode; | |
762 | struct nfs4_state_owner *owner = state->owner; | |
763 | ||
ace9fad4 | 764 | if (!refcount_dec_and_lock(&state->count, &owner->so_lock)) |
1da177e4 | 765 | return; |
ec073428 | 766 | spin_lock(&inode->i_lock); |
9ae075fd | 767 | list_del_rcu(&state->inode_states); |
1da177e4 | 768 | list_del(&state->open_states); |
ec073428 TM |
769 | spin_unlock(&inode->i_lock); |
770 | spin_unlock(&owner->so_lock); | |
b7b7dac6 | 771 | nfs4_inode_return_delegation_on_close(inode); |
1da177e4 | 772 | iput(inode); |
1da177e4 LT |
773 | nfs4_free_open_state(state); |
774 | nfs4_put_state_owner(owner); | |
775 | } | |
776 | ||
777 | /* | |
83c9d41e | 778 | * Close the current file. |
1da177e4 | 779 | */ |
643168c2 | 780 | static void __nfs4_close(struct nfs4_state *state, |
8535b2be | 781 | fmode_t fmode, gfp_t gfp_mask, int wait) |
1da177e4 | 782 | { |
1da177e4 | 783 | struct nfs4_state_owner *owner = state->owner; |
003707c7 | 784 | int call_close = 0; |
dc0b027d | 785 | fmode_t newstate; |
1da177e4 LT |
786 | |
787 | atomic_inc(&owner->so_count); | |
1da177e4 | 788 | /* Protect against nfs4_find_state() */ |
ec073428 | 789 | spin_lock(&owner->so_lock); |
dc0b027d | 790 | switch (fmode & (FMODE_READ | FMODE_WRITE)) { |
e7616923 TM |
791 | case FMODE_READ: |
792 | state->n_rdonly--; | |
793 | break; | |
794 | case FMODE_WRITE: | |
795 | state->n_wronly--; | |
796 | break; | |
797 | case FMODE_READ|FMODE_WRITE: | |
798 | state->n_rdwr--; | |
799 | } | |
003707c7 | 800 | newstate = FMODE_READ|FMODE_WRITE; |
e7616923 | 801 | if (state->n_rdwr == 0) { |
003707c7 | 802 | if (state->n_rdonly == 0) { |
e7616923 | 803 | newstate &= ~FMODE_READ; |
003707c7 TM |
804 | call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags); |
805 | call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); | |
806 | } | |
807 | if (state->n_wronly == 0) { | |
e7616923 | 808 | newstate &= ~FMODE_WRITE; |
003707c7 TM |
809 | call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags); |
810 | call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); | |
811 | } | |
812 | if (newstate == 0) | |
813 | clear_bit(NFS_DELEGATED_STATE, &state->flags); | |
e7616923 | 814 | } |
003707c7 | 815 | nfs4_state_set_mode_locked(state, newstate); |
ec073428 | 816 | spin_unlock(&owner->so_lock); |
4cecb76f | 817 | |
003707c7 | 818 | if (!call_close) { |
b39e625b TM |
819 | nfs4_put_open_state(state); |
820 | nfs4_put_state_owner(owner); | |
1f7977c1 TM |
821 | } else |
822 | nfs4_do_close(state, gfp_mask, wait); | |
a49c3c77 TM |
823 | } |
824 | ||
643168c2 | 825 | void nfs4_close_state(struct nfs4_state *state, fmode_t fmode) |
a49c3c77 | 826 | { |
da48f267 | 827 | __nfs4_close(state, fmode, GFP_KERNEL, 0); |
a49c3c77 TM |
828 | } |
829 | ||
643168c2 | 830 | void nfs4_close_sync(struct nfs4_state *state, fmode_t fmode) |
a49c3c77 | 831 | { |
643168c2 | 832 | __nfs4_close(state, fmode, GFP_KERNEL, 1); |
1da177e4 LT |
833 | } |
834 | ||
835 | /* | |
836 | * Search the state->lock_states for an existing lock_owner | |
3f8f2548 N |
837 | * that is compatible with either of the given owners. |
838 | * If the second is non-zero, then the first refers to a Posix-lock | |
839 | * owner (current->files) and the second refers to a flock/OFD | |
840 | * owner (struct file*). In that case, prefer a match for the first | |
841 | * owner. | |
842 | * If both sorts of locks are held on the one file we cannot know | |
843 | * which stateid was intended to be used, so a "correct" choice cannot | |
844 | * be made. Failing that, a "consistent" choice is preferable. The | |
845 | * consistent choice we make is to prefer the first owner, that of a | |
846 | * Posix lock. | |
1da177e4 LT |
847 | */ |
848 | static struct nfs4_lock_state * | |
8d424431 N |
849 | __nfs4_find_lock_state(struct nfs4_state *state, |
850 | fl_owner_t fl_owner, fl_owner_t fl_owner2) | |
1da177e4 | 851 | { |
3f8f2548 | 852 | struct nfs4_lock_state *pos, *ret = NULL; |
1da177e4 | 853 | list_for_each_entry(pos, &state->lock_states, ls_locks) { |
3f8f2548 N |
854 | if (pos->ls_owner == fl_owner) { |
855 | ret = pos; | |
856 | break; | |
857 | } | |
858 | if (pos->ls_owner == fl_owner2) | |
859 | ret = pos; | |
1da177e4 | 860 | } |
3f8f2548 | 861 | if (ret) |
194bc1f4 | 862 | refcount_inc(&ret->ls_count); |
3f8f2548 | 863 | return ret; |
1da177e4 LT |
864 | } |
865 | ||
1da177e4 LT |
866 | /* |
867 | * Return a compatible lock_state. If no initialized lock_state structure | |
868 | * exists, return an uninitialized one. | |
869 | * | |
1da177e4 | 870 | */ |
8003d3c4 | 871 | static struct nfs4_lock_state *nfs4_alloc_lock_state(struct nfs4_state *state, fl_owner_t fl_owner) |
1da177e4 LT |
872 | { |
873 | struct nfs4_lock_state *lsp; | |
24d292b8 | 874 | struct nfs_server *server = state->owner->so_server; |
1da177e4 | 875 | |
9c00fd9a | 876 | lsp = kzalloc(sizeof(*lsp), GFP_KERNEL_ACCOUNT); |
1da177e4 LT |
877 | if (lsp == NULL) |
878 | return NULL; | |
7ba127ab | 879 | nfs4_init_seqid_counter(&lsp->ls_seqid); |
194bc1f4 | 880 | refcount_set(&lsp->ls_count, 1); |
b64aec8d | 881 | lsp->ls_state = state; |
8003d3c4 | 882 | lsp->ls_owner = fl_owner; |
724e2df9 | 883 | lsp->ls_seqid.owner_id = ida_alloc(&server->lockowner_id, GFP_KERNEL_ACCOUNT); |
48c22eb2 | 884 | if (lsp->ls_seqid.owner_id < 0) |
d2d7ce28 | 885 | goto out_free; |
8d0a8a9d | 886 | INIT_LIST_HEAD(&lsp->ls_locks); |
1da177e4 | 887 | return lsp; |
d2d7ce28 TM |
888 | out_free: |
889 | kfree(lsp); | |
890 | return NULL; | |
1da177e4 LT |
891 | } |
892 | ||
5ae67c4f | 893 | void nfs4_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp) |
9f958ab8 | 894 | { |
724e2df9 | 895 | ida_free(&server->lockowner_id, lsp->ls_seqid.owner_id); |
7ba127ab | 896 | nfs4_destroy_seqid_counter(&lsp->ls_seqid); |
9f958ab8 TM |
897 | kfree(lsp); |
898 | } | |
899 | ||
1da177e4 LT |
900 | /* |
901 | * Return a compatible lock_state. If no initialized lock_state structure | |
902 | * exists, return an uninitialized one. | |
903 | * | |
1da177e4 | 904 | */ |
8003d3c4 | 905 | static struct nfs4_lock_state *nfs4_get_lock_state(struct nfs4_state *state, fl_owner_t owner) |
1da177e4 | 906 | { |
8d0a8a9d | 907 | struct nfs4_lock_state *lsp, *new = NULL; |
1da177e4 | 908 | |
8d0a8a9d TM |
909 | for(;;) { |
910 | spin_lock(&state->state_lock); | |
68e33bd6 | 911 | lsp = __nfs4_find_lock_state(state, owner, NULL); |
8d0a8a9d TM |
912 | if (lsp != NULL) |
913 | break; | |
914 | if (new != NULL) { | |
8d0a8a9d TM |
915 | list_add(&new->ls_locks, &state->lock_states); |
916 | set_bit(LK_STATE_IN_USE, &state->flags); | |
917 | lsp = new; | |
918 | new = NULL; | |
919 | break; | |
920 | } | |
921 | spin_unlock(&state->state_lock); | |
8003d3c4 | 922 | new = nfs4_alloc_lock_state(state, owner); |
8d0a8a9d TM |
923 | if (new == NULL) |
924 | return NULL; | |
925 | } | |
926 | spin_unlock(&state->state_lock); | |
9f958ab8 | 927 | if (new != NULL) |
5ae67c4f | 928 | nfs4_free_lock_state(state->owner->so_server, new); |
1da177e4 LT |
929 | return lsp; |
930 | } | |
931 | ||
932 | /* | |
8d0a8a9d TM |
933 | * Release reference to lock_state, and free it if we see that |
934 | * it is no longer in use | |
1da177e4 | 935 | */ |
faf5f49c | 936 | void nfs4_put_lock_state(struct nfs4_lock_state *lsp) |
1da177e4 | 937 | { |
c8b2d0bf | 938 | struct nfs_server *server; |
8d0a8a9d | 939 | struct nfs4_state *state; |
1da177e4 | 940 | |
8d0a8a9d TM |
941 | if (lsp == NULL) |
942 | return; | |
943 | state = lsp->ls_state; | |
194bc1f4 | 944 | if (!refcount_dec_and_lock(&lsp->ls_count, &state->state_lock)) |
8d0a8a9d TM |
945 | return; |
946 | list_del(&lsp->ls_locks); | |
947 | if (list_empty(&state->lock_states)) | |
948 | clear_bit(LK_STATE_IN_USE, &state->flags); | |
949 | spin_unlock(&state->state_lock); | |
0c0e0d3c JL |
950 | server = state->owner->so_server; |
951 | if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) { | |
952 | struct nfs_client *clp = server->nfs_client; | |
953 | ||
954 | clp->cl_mvops->free_lock_state(server, lsp); | |
955 | } else | |
c8b2d0bf | 956 | nfs4_free_lock_state(server, lsp); |
1da177e4 LT |
957 | } |
958 | ||
8d0a8a9d | 959 | static void nfs4_fl_copy_lock(struct file_lock *dst, struct file_lock *src) |
1da177e4 | 960 | { |
8d0a8a9d | 961 | struct nfs4_lock_state *lsp = src->fl_u.nfs4_fl.owner; |
1da177e4 | 962 | |
8d0a8a9d | 963 | dst->fl_u.nfs4_fl.owner = lsp; |
194bc1f4 | 964 | refcount_inc(&lsp->ls_count); |
8d0a8a9d | 965 | } |
1da177e4 | 966 | |
8d0a8a9d | 967 | static void nfs4_fl_release_lock(struct file_lock *fl) |
1da177e4 | 968 | { |
8d0a8a9d | 969 | nfs4_put_lock_state(fl->fl_u.nfs4_fl.owner); |
1da177e4 LT |
970 | } |
971 | ||
6aed6285 | 972 | static const struct file_lock_operations nfs4_fl_lock_ops = { |
8d0a8a9d TM |
973 | .fl_copy_lock = nfs4_fl_copy_lock, |
974 | .fl_release_private = nfs4_fl_release_lock, | |
975 | }; | |
976 | ||
977 | int nfs4_set_lock_state(struct nfs4_state *state, struct file_lock *fl) | |
1da177e4 | 978 | { |
8d0a8a9d TM |
979 | struct nfs4_lock_state *lsp; |
980 | ||
981 | if (fl->fl_ops != NULL) | |
982 | return 0; | |
8003d3c4 | 983 | lsp = nfs4_get_lock_state(state, fl->fl_owner); |
8d0a8a9d TM |
984 | if (lsp == NULL) |
985 | return -ENOMEM; | |
986 | fl->fl_u.nfs4_fl.owner = lsp; | |
987 | fl->fl_ops = &nfs4_fl_lock_ops; | |
988 | return 0; | |
1da177e4 LT |
989 | } |
990 | ||
5521abfd TM |
991 | static int nfs4_copy_lock_stateid(nfs4_stateid *dst, |
992 | struct nfs4_state *state, | |
17393475 | 993 | const struct nfs_lock_context *l_ctx) |
1da177e4 | 994 | { |
8d0a8a9d | 995 | struct nfs4_lock_state *lsp; |
8d424431 | 996 | fl_owner_t fl_owner, fl_flock_owner; |
5521abfd | 997 | int ret = -ENOENT; |
1da177e4 | 998 | |
17393475 | 999 | if (l_ctx == NULL) |
2a369153 TM |
1000 | goto out; |
1001 | ||
8d0a8a9d | 1002 | if (test_bit(LK_STATE_IN_USE, &state->flags) == 0) |
4fc8796d | 1003 | goto out; |
1da177e4 | 1004 | |
d51fdb87 | 1005 | fl_owner = l_ctx->lockowner; |
8d424431 N |
1006 | fl_flock_owner = l_ctx->open_context->flock_owner; |
1007 | ||
8d0a8a9d | 1008 | spin_lock(&state->state_lock); |
8d424431 | 1009 | lsp = __nfs4_find_lock_state(state, fl_owner, fl_flock_owner); |
ef1820f9 N |
1010 | if (lsp && test_bit(NFS_LOCK_LOST, &lsp->ls_flags)) |
1011 | ret = -EIO; | |
1012 | else if (lsp != NULL && test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0) { | |
f597c537 | 1013 | nfs4_stateid_copy(dst, &lsp->ls_stateid); |
5521abfd | 1014 | ret = 0; |
4fc8796d | 1015 | } |
8d0a8a9d | 1016 | spin_unlock(&state->state_lock); |
1da177e4 | 1017 | nfs4_put_lock_state(lsp); |
4fc8796d TM |
1018 | out: |
1019 | return ret; | |
1020 | } | |
1021 | ||
c82bac6f | 1022 | bool nfs4_copy_open_stateid(nfs4_stateid *dst, struct nfs4_state *state) |
4fc8796d | 1023 | { |
c82bac6f | 1024 | bool ret; |
92b40e93 | 1025 | const nfs4_stateid *src; |
4fc8796d TM |
1026 | int seq; |
1027 | ||
1028 | do { | |
c82bac6f | 1029 | ret = false; |
92b40e93 | 1030 | src = &zero_stateid; |
4fc8796d | 1031 | seq = read_seqbegin(&state->seqlock); |
c82bac6f | 1032 | if (test_bit(NFS_OPEN_STATE, &state->flags)) { |
92b40e93 | 1033 | src = &state->open_stateid; |
c82bac6f TM |
1034 | ret = true; |
1035 | } | |
92b40e93 | 1036 | nfs4_stateid_copy(dst, src); |
4fc8796d | 1037 | } while (read_seqretry(&state->seqlock, seq)); |
c82bac6f | 1038 | return ret; |
4fc8796d TM |
1039 | } |
1040 | ||
1041 | /* | |
1042 | * Byte-range lock aware utility to initialize the stateid of read/write | |
1043 | * requests. | |
1044 | */ | |
abf4e13c | 1045 | int nfs4_select_rw_stateid(struct nfs4_state *state, |
17393475 | 1046 | fmode_t fmode, const struct nfs_lock_context *l_ctx, |
a52458b4 | 1047 | nfs4_stateid *dst, const struct cred **cred) |
4fc8796d | 1048 | { |
abf4e13c TM |
1049 | int ret; |
1050 | ||
7ebeb7fe TM |
1051 | if (!nfs4_valid_open_stateid(state)) |
1052 | return -EIO; | |
abf4e13c TM |
1053 | if (cred != NULL) |
1054 | *cred = NULL; | |
17393475 | 1055 | ret = nfs4_copy_lock_stateid(dst, state, l_ctx); |
ef1820f9 N |
1056 | if (ret == -EIO) |
1057 | /* A lost lock - don't even consider delegations */ | |
1058 | goto out; | |
146d70ca | 1059 | /* returns true if delegation stateid found and copied */ |
abf4e13c | 1060 | if (nfs4_copy_delegation_stateid(state->inode, fmode, dst, cred)) { |
146d70ca | 1061 | ret = 0; |
5521abfd | 1062 | goto out; |
146d70ca | 1063 | } |
5521abfd | 1064 | if (ret != -ENOENT) |
ef1820f9 N |
1065 | /* nfs4_copy_delegation_stateid() didn't over-write |
1066 | * dst, so it still has the lock stateid which we now | |
1067 | * choose to use. | |
1068 | */ | |
5521abfd | 1069 | goto out; |
d9aba2b4 | 1070 | ret = nfs4_copy_open_stateid(dst, state) ? 0 : -EAGAIN; |
5521abfd | 1071 | out: |
3b66486c TM |
1072 | if (nfs_server_capable(state->inode, NFS_CAP_STATEID_NFSV41)) |
1073 | dst->seqid = 0; | |
5521abfd | 1074 | return ret; |
1da177e4 LT |
1075 | } |
1076 | ||
8535b2be | 1077 | struct nfs_seqid *nfs_alloc_seqid(struct nfs_seqid_counter *counter, gfp_t gfp_mask) |
cee54fc9 | 1078 | { |
cee54fc9 TM |
1079 | struct nfs_seqid *new; |
1080 | ||
8535b2be | 1081 | new = kmalloc(sizeof(*new), gfp_mask); |
badc76dd TM |
1082 | if (new == NULL) |
1083 | return ERR_PTR(-ENOMEM); | |
1084 | new->sequence = counter; | |
1085 | INIT_LIST_HEAD(&new->list); | |
1086 | new->task = NULL; | |
cee54fc9 TM |
1087 | return new; |
1088 | } | |
1089 | ||
72211dbe | 1090 | void nfs_release_seqid(struct nfs_seqid *seqid) |
1da177e4 | 1091 | { |
4601df20 | 1092 | struct nfs_seqid_counter *sequence; |
cee54fc9 | 1093 | |
a6796419 | 1094 | if (seqid == NULL || list_empty(&seqid->list)) |
4601df20 TM |
1095 | return; |
1096 | sequence = seqid->sequence; | |
1097 | spin_lock(&sequence->lock); | |
1098 | list_del_init(&seqid->list); | |
1099 | if (!list_empty(&sequence->list)) { | |
1100 | struct nfs_seqid *next; | |
1101 | ||
1102 | next = list_first_entry(&sequence->list, | |
1103 | struct nfs_seqid, list); | |
1104 | rpc_wake_up_queued_task(&sequence->wait, next->task); | |
2f74c0a0 | 1105 | } |
4601df20 | 1106 | spin_unlock(&sequence->lock); |
72211dbe TM |
1107 | } |
1108 | ||
1109 | void nfs_free_seqid(struct nfs_seqid *seqid) | |
1110 | { | |
1111 | nfs_release_seqid(seqid); | |
cee54fc9 | 1112 | kfree(seqid); |
1da177e4 LT |
1113 | } |
1114 | ||
1115 | /* | |
cee54fc9 TM |
1116 | * Increment the seqid if the OPEN/OPEN_DOWNGRADE/CLOSE succeeded, or |
1117 | * failed with a seqid incrementing error - | |
16a6ddc7 | 1118 | * see comments nfs4.h:seqid_mutating_error() |
cee54fc9 | 1119 | */ |
88d90939 | 1120 | static void nfs_increment_seqid(int status, struct nfs_seqid *seqid) |
cee54fc9 TM |
1121 | { |
1122 | switch (status) { | |
1123 | case 0: | |
1124 | break; | |
1125 | case -NFS4ERR_BAD_SEQID: | |
6f43ddcc TM |
1126 | if (seqid->sequence->flags & NFS_SEQID_CONFIRMED) |
1127 | return; | |
9a3ba432 | 1128 | pr_warn_ratelimited("NFS: v4 server returned a bad" |
497799e7 DM |
1129 | " sequence-id error on an" |
1130 | " unconfirmed sequence %p!\n", | |
6f43ddcc | 1131 | seqid->sequence); |
ffb81717 | 1132 | return; |
cee54fc9 TM |
1133 | case -NFS4ERR_STALE_CLIENTID: |
1134 | case -NFS4ERR_STALE_STATEID: | |
1135 | case -NFS4ERR_BAD_STATEID: | |
1136 | case -NFS4ERR_BADXDR: | |
1137 | case -NFS4ERR_RESOURCE: | |
1138 | case -NFS4ERR_NOFILEHANDLE: | |
406dab84 | 1139 | case -NFS4ERR_MOVED: |
cee54fc9 TM |
1140 | /* Non-seqid mutating errors */ |
1141 | return; | |
8b98a532 | 1142 | } |
cee54fc9 TM |
1143 | /* |
1144 | * Note: no locking needed as we are guaranteed to be first | |
1145 | * on the sequence list | |
1146 | */ | |
1147 | seqid->sequence->counter++; | |
1148 | } | |
1149 | ||
1150 | void nfs_increment_open_seqid(int status, struct nfs_seqid *seqid) | |
1151 | { | |
a6796419 TM |
1152 | struct nfs4_state_owner *sp; |
1153 | ||
1154 | if (seqid == NULL) | |
1155 | return; | |
34dc1ad7 | 1156 | |
a6796419 | 1157 | sp = container_of(seqid->sequence, struct nfs4_state_owner, so_seqid); |
34dc1ad7 | 1158 | if (status == -NFS4ERR_BAD_SEQID) |
86cfb041 | 1159 | nfs4_reset_state_owner(sp); |
a6796419 | 1160 | if (!nfs4_has_session(sp->so_server->nfs_client)) |
34dc1ad7 | 1161 | nfs_increment_seqid(status, seqid); |
cee54fc9 TM |
1162 | } |
1163 | ||
1164 | /* | |
cee54fc9 TM |
1165 | * Increment the seqid if the LOCK/LOCKU succeeded, or |
1166 | * failed with a seqid incrementing error - | |
16a6ddc7 | 1167 | * see comments nfs4.h:seqid_mutating_error() |
cee54fc9 TM |
1168 | */ |
1169 | void nfs_increment_lock_seqid(int status, struct nfs_seqid *seqid) | |
1170 | { | |
a6796419 TM |
1171 | if (seqid != NULL) |
1172 | nfs_increment_seqid(status, seqid); | |
cee54fc9 TM |
1173 | } |
1174 | ||
1175 | int nfs_wait_on_sequence(struct nfs_seqid *seqid, struct rpc_task *task) | |
1176 | { | |
a6796419 | 1177 | struct nfs_seqid_counter *sequence; |
cee54fc9 TM |
1178 | int status = 0; |
1179 | ||
a6796419 TM |
1180 | if (seqid == NULL) |
1181 | goto out; | |
1182 | sequence = seqid->sequence; | |
cee54fc9 | 1183 | spin_lock(&sequence->lock); |
4601df20 | 1184 | seqid->task = task; |
2f74c0a0 TM |
1185 | if (list_empty(&seqid->list)) |
1186 | list_add_tail(&seqid->list, &sequence->list); | |
1187 | if (list_first_entry(&sequence->list, struct nfs_seqid, list) == seqid) | |
1188 | goto unlock; | |
5d00837b | 1189 | rpc_sleep_on(&sequence->wait, task, NULL); |
2f74c0a0 TM |
1190 | status = -EAGAIN; |
1191 | unlock: | |
cee54fc9 | 1192 | spin_unlock(&sequence->lock); |
a6796419 | 1193 | out: |
cee54fc9 | 1194 | return status; |
1da177e4 LT |
1195 | } |
1196 | ||
e005e804 | 1197 | static int nfs4_run_state_manager(void *); |
1da177e4 | 1198 | |
e005e804 | 1199 | static void nfs4_clear_state_manager_bit(struct nfs_client *clp) |
433fbe4c | 1200 | { |
43d20e80 | 1201 | clear_and_wake_up_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state); |
433fbe4c TM |
1202 | rpc_wake_up(&clp->cl_rpcwaitq); |
1203 | } | |
1204 | ||
1da177e4 | 1205 | /* |
e005e804 | 1206 | * Schedule the nfs_client asynchronous state management routine |
1da177e4 | 1207 | */ |
b0d3ded1 | 1208 | void nfs4_schedule_state_manager(struct nfs_client *clp) |
1da177e4 | 1209 | { |
5043e900 | 1210 | struct task_struct *task; |
2446ab60 | 1211 | char buf[INET6_ADDRSTRLEN + sizeof("-manager") + 1]; |
956fd46f TM |
1212 | struct rpc_clnt *clnt = clp->cl_rpcclient; |
1213 | bool swapon = false; | |
1da177e4 | 1214 | |
956fd46f | 1215 | if (clnt->cl_shutdown) |
6ad477a6 BC |
1216 | return; |
1217 | ||
aeabb3c9 | 1218 | set_bit(NFS4CLNT_RUN_MANAGER, &clp->cl_state); |
956fd46f TM |
1219 | |
1220 | if (atomic_read(&clnt->cl_swapper)) { | |
1221 | swapon = !test_and_set_bit(NFS4CLNT_MANAGER_AVAILABLE, | |
1222 | &clp->cl_state); | |
1223 | if (!swapon) { | |
1224 | wake_up_var(&clp->cl_state); | |
1225 | return; | |
1226 | } | |
4dc73c67 | 1227 | } |
956fd46f TM |
1228 | |
1229 | if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) != 0) | |
1230 | return; | |
1231 | ||
5043e900 | 1232 | __module_get(THIS_MODULE); |
212bf41d | 1233 | refcount_inc(&clp->cl_count); |
2446ab60 TM |
1234 | |
1235 | /* The rcu_read_lock() is not strictly necessary, as the state | |
1236 | * manager is the only thread that ever changes the rpc_xprt | |
1237 | * after it's initialized. At this point, we're single threaded. */ | |
1238 | rcu_read_lock(); | |
1239 | snprintf(buf, sizeof(buf), "%s-manager", | |
1240 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)); | |
1241 | rcu_read_unlock(); | |
f170168b | 1242 | task = kthread_run(nfs4_run_state_manager, clp, "%s", buf); |
2446ab60 TM |
1243 | if (IS_ERR(task)) { |
1244 | printk(KERN_ERR "%s: kthread_run: %ld\n", | |
1245 | __func__, PTR_ERR(task)); | |
b4e4f669 TM |
1246 | if (!nfs_client_init_is_complete(clp)) |
1247 | nfs_mark_client_ready(clp, PTR_ERR(task)); | |
956fd46f TM |
1248 | if (swapon) |
1249 | clear_bit(NFS4CLNT_MANAGER_AVAILABLE, &clp->cl_state); | |
2446ab60 TM |
1250 | nfs4_clear_state_manager_bit(clp); |
1251 | nfs_put_client(clp); | |
1252 | module_put(THIS_MODULE); | |
1253 | } | |
1da177e4 LT |
1254 | } |
1255 | ||
1256 | /* | |
0400a6b0 | 1257 | * Schedule a lease recovery attempt |
1da177e4 | 1258 | */ |
0400a6b0 | 1259 | void nfs4_schedule_lease_recovery(struct nfs_client *clp) |
1da177e4 LT |
1260 | { |
1261 | if (!clp) | |
1262 | return; | |
e598d843 TM |
1263 | if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
1264 | set_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); | |
cc0a9843 TM |
1265 | dprintk("%s: scheduling lease recovery for server %s\n", __func__, |
1266 | clp->cl_hostname); | |
e005e804 | 1267 | nfs4_schedule_state_manager(clp); |
1da177e4 | 1268 | } |
9cb81968 | 1269 | EXPORT_SYMBOL_GPL(nfs4_schedule_lease_recovery); |
1da177e4 | 1270 | |
c9fdeb28 CL |
1271 | /** |
1272 | * nfs4_schedule_migration_recovery - trigger migration recovery | |
1273 | * | |
1274 | * @server: FSID that is migrating | |
1275 | * | |
1276 | * Returns zero if recovery has started, otherwise a negative NFS4ERR | |
1277 | * value is returned. | |
1278 | */ | |
1279 | int nfs4_schedule_migration_recovery(const struct nfs_server *server) | |
1280 | { | |
1281 | struct nfs_client *clp = server->nfs_client; | |
1282 | ||
1283 | if (server->fh_expire_type != NFS4_FH_PERSISTENT) { | |
1284 | pr_err("NFS: volatile file handles not supported (server %s)\n", | |
1285 | clp->cl_hostname); | |
1286 | return -NFS4ERR_IO; | |
1287 | } | |
1288 | ||
1289 | if (test_bit(NFS_MIG_FAILED, &server->mig_status)) | |
1290 | return -NFS4ERR_IO; | |
1291 | ||
1292 | dprintk("%s: scheduling migration recovery for (%llx:%llx) on %s\n", | |
1293 | __func__, | |
1294 | (unsigned long long)server->fsid.major, | |
1295 | (unsigned long long)server->fsid.minor, | |
1296 | clp->cl_hostname); | |
1297 | ||
1298 | set_bit(NFS_MIG_IN_TRANSITION, | |
1299 | &((struct nfs_server *)server)->mig_status); | |
1300 | set_bit(NFS4CLNT_MOVED, &clp->cl_state); | |
1301 | ||
1302 | nfs4_schedule_state_manager(clp); | |
1303 | return 0; | |
1304 | } | |
1305 | EXPORT_SYMBOL_GPL(nfs4_schedule_migration_recovery); | |
1306 | ||
b7f7a66e CL |
1307 | /** |
1308 | * nfs4_schedule_lease_moved_recovery - start lease-moved recovery | |
1309 | * | |
1310 | * @clp: server to check for moved leases | |
1311 | * | |
1312 | */ | |
1313 | void nfs4_schedule_lease_moved_recovery(struct nfs_client *clp) | |
1314 | { | |
1315 | dprintk("%s: scheduling lease-moved recovery for client ID %llx on %s\n", | |
1316 | __func__, clp->cl_clientid, clp->cl_hostname); | |
1317 | ||
1318 | set_bit(NFS4CLNT_LEASE_MOVED, &clp->cl_state); | |
1319 | nfs4_schedule_state_manager(clp); | |
1320 | } | |
1321 | EXPORT_SYMBOL_GPL(nfs4_schedule_lease_moved_recovery); | |
1322 | ||
33021279 TM |
1323 | int nfs4_wait_clnt_recover(struct nfs_client *clp) |
1324 | { | |
1325 | int res; | |
1326 | ||
1327 | might_sleep(); | |
1328 | ||
212bf41d | 1329 | refcount_inc(&clp->cl_count); |
74316201 | 1330 | res = wait_on_bit_action(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING, |
f5d39b02 PZ |
1331 | nfs_wait_bit_killable, |
1332 | TASK_KILLABLE|TASK_FREEZABLE_UNSAFE); | |
33021279 | 1333 | if (res) |
0625c2dd | 1334 | goto out; |
33021279 | 1335 | if (clp->cl_cons_state < 0) |
0625c2dd CL |
1336 | res = clp->cl_cons_state; |
1337 | out: | |
1338 | nfs_put_client(clp); | |
1339 | return res; | |
33021279 TM |
1340 | } |
1341 | ||
1342 | int nfs4_client_recover_expired_lease(struct nfs_client *clp) | |
1343 | { | |
1344 | unsigned int loop; | |
1345 | int ret; | |
1346 | ||
1347 | for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) { | |
1348 | ret = nfs4_wait_clnt_recover(clp); | |
1349 | if (ret != 0) | |
1350 | break; | |
1351 | if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) && | |
1352 | !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state)) | |
1353 | break; | |
1354 | nfs4_schedule_state_manager(clp); | |
1355 | ret = -EIO; | |
1356 | } | |
1357 | return ret; | |
1358 | } | |
1359 | ||
ad1e3968 TM |
1360 | /* |
1361 | * nfs40_handle_cb_pathdown - return all delegations after NFS4ERR_CB_PATH_DOWN | |
1362 | * @clp: client to process | |
1363 | * | |
1364 | * Set the NFS4CLNT_LEASE_EXPIRED state in order to force a | |
1365 | * resend of the SETCLIENTID and hence re-establish the | |
1366 | * callback channel. Then return all existing delegations. | |
1367 | */ | |
1368 | static void nfs40_handle_cb_pathdown(struct nfs_client *clp) | |
1369 | { | |
1370 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1371 | nfs_expire_all_delegations(clp); | |
cc0a9843 TM |
1372 | dprintk("%s: handling CB_PATHDOWN recovery for server %s\n", __func__, |
1373 | clp->cl_hostname); | |
ad1e3968 TM |
1374 | } |
1375 | ||
042b60be TM |
1376 | void nfs4_schedule_path_down_recovery(struct nfs_client *clp) |
1377 | { | |
ad1e3968 | 1378 | nfs40_handle_cb_pathdown(clp); |
042b60be TM |
1379 | nfs4_schedule_state_manager(clp); |
1380 | } | |
1381 | ||
f9feab1e | 1382 | static int nfs4_state_mark_reclaim_reboot(struct nfs_client *clp, struct nfs4_state *state) |
b79a4a1b TM |
1383 | { |
1384 | ||
7ebeb7fe TM |
1385 | if (!nfs4_valid_open_stateid(state)) |
1386 | return 0; | |
b79a4a1b TM |
1387 | set_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); |
1388 | /* Don't recover state that expired before the reboot */ | |
1389 | if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) { | |
1390 | clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); | |
1391 | return 0; | |
1392 | } | |
7eff03ae | 1393 | set_bit(NFS_OWNER_RECLAIM_REBOOT, &state->owner->so_flags); |
b79a4a1b TM |
1394 | set_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state); |
1395 | return 1; | |
1396 | } | |
1397 | ||
4f14c194 | 1398 | int nfs4_state_mark_reclaim_nograce(struct nfs_client *clp, struct nfs4_state *state) |
b79a4a1b | 1399 | { |
7ebeb7fe TM |
1400 | if (!nfs4_valid_open_stateid(state)) |
1401 | return 0; | |
b79a4a1b TM |
1402 | set_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags); |
1403 | clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); | |
7eff03ae | 1404 | set_bit(NFS_OWNER_RECLAIM_NOGRACE, &state->owner->so_flags); |
b79a4a1b TM |
1405 | set_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state); |
1406 | return 1; | |
1407 | } | |
1408 | ||
5d422301 | 1409 | int nfs4_schedule_stateid_recovery(const struct nfs_server *server, struct nfs4_state *state) |
0400a6b0 TM |
1410 | { |
1411 | struct nfs_client *clp = server->nfs_client; | |
1412 | ||
7ebeb7fe | 1413 | if (!nfs4_state_mark_reclaim_nograce(clp, state)) |
5d422301 | 1414 | return -EBADF; |
994b15b9 TM |
1415 | nfs_inode_find_delegation_state_and_recover(state->inode, |
1416 | &state->stateid); | |
cc0a9843 TM |
1417 | dprintk("%s: scheduling stateid recovery for server %s\n", __func__, |
1418 | clp->cl_hostname); | |
0400a6b0 | 1419 | nfs4_schedule_state_manager(clp); |
5d422301 | 1420 | return 0; |
0400a6b0 | 1421 | } |
9cb81968 | 1422 | EXPORT_SYMBOL_GPL(nfs4_schedule_stateid_recovery); |
0400a6b0 | 1423 | |
6c2d8f8d TM |
1424 | static struct nfs4_lock_state * |
1425 | nfs_state_find_lock_state_by_stateid(struct nfs4_state *state, | |
1426 | const nfs4_stateid *stateid) | |
1427 | { | |
1428 | struct nfs4_lock_state *pos; | |
1429 | ||
1430 | list_for_each_entry(pos, &state->lock_states, ls_locks) { | |
1431 | if (!test_bit(NFS_LOCK_INITIALIZED, &pos->ls_flags)) | |
1432 | continue; | |
42c304c3 | 1433 | if (nfs4_stateid_match_or_older(&pos->ls_stateid, stateid)) |
6c2d8f8d TM |
1434 | return pos; |
1435 | } | |
1436 | return NULL; | |
1437 | } | |
1438 | ||
1439 | static bool nfs_state_lock_state_matches_stateid(struct nfs4_state *state, | |
1440 | const nfs4_stateid *stateid) | |
1441 | { | |
1442 | bool found = false; | |
1443 | ||
1444 | if (test_bit(LK_STATE_IN_USE, &state->flags)) { | |
1445 | spin_lock(&state->state_lock); | |
1446 | if (nfs_state_find_lock_state_by_stateid(state, stateid)) | |
1447 | found = true; | |
1448 | spin_unlock(&state->state_lock); | |
1449 | } | |
1450 | return found; | |
1451 | } | |
1452 | ||
a1d0b5ee TM |
1453 | void nfs_inode_find_state_and_recover(struct inode *inode, |
1454 | const nfs4_stateid *stateid) | |
1455 | { | |
1456 | struct nfs_client *clp = NFS_SERVER(inode)->nfs_client; | |
1457 | struct nfs_inode *nfsi = NFS_I(inode); | |
1458 | struct nfs_open_context *ctx; | |
1459 | struct nfs4_state *state; | |
1460 | bool found = false; | |
1461 | ||
0de43976 TM |
1462 | rcu_read_lock(); |
1463 | list_for_each_entry_rcu(ctx, &nfsi->open_files, list) { | |
a1d0b5ee TM |
1464 | state = ctx->state; |
1465 | if (state == NULL) | |
1466 | continue; | |
42c304c3 | 1467 | if (nfs4_stateid_match_or_older(&state->stateid, stateid) && |
7ebeb7fe | 1468 | nfs4_state_mark_reclaim_nograce(clp, state)) { |
6c2d8f8d | 1469 | found = true; |
a1d0b5ee | 1470 | continue; |
6c2d8f8d | 1471 | } |
42c304c3 TM |
1472 | if (test_bit(NFS_OPEN_STATE, &state->flags) && |
1473 | nfs4_stateid_match_or_older(&state->open_stateid, stateid) && | |
46280d9d TM |
1474 | nfs4_state_mark_reclaim_nograce(clp, state)) { |
1475 | found = true; | |
1476 | continue; | |
1477 | } | |
7ebeb7fe TM |
1478 | if (nfs_state_lock_state_matches_stateid(state, stateid) && |
1479 | nfs4_state_mark_reclaim_nograce(clp, state)) | |
6c2d8f8d | 1480 | found = true; |
a1d0b5ee | 1481 | } |
0de43976 | 1482 | rcu_read_unlock(); |
6c2d8f8d TM |
1483 | |
1484 | nfs_inode_find_delegation_state_and_recover(inode, stateid); | |
a1d0b5ee TM |
1485 | if (found) |
1486 | nfs4_schedule_state_manager(clp); | |
1487 | } | |
1488 | ||
86dbd08b | 1489 | static void nfs4_state_mark_open_context_bad(struct nfs4_state *state, int err) |
c58c8441 TM |
1490 | { |
1491 | struct inode *inode = state->inode; | |
1492 | struct nfs_inode *nfsi = NFS_I(inode); | |
1493 | struct nfs_open_context *ctx; | |
1494 | ||
0de43976 TM |
1495 | rcu_read_lock(); |
1496 | list_for_each_entry_rcu(ctx, &nfsi->open_files, list) { | |
c58c8441 TM |
1497 | if (ctx->state != state) |
1498 | continue; | |
1499 | set_bit(NFS_CONTEXT_BAD, &ctx->flags); | |
86dbd08b TM |
1500 | pr_warn("NFSv4: state recovery failed for open file %pd2, " |
1501 | "error = %d\n", ctx->dentry, err); | |
c58c8441 | 1502 | } |
0de43976 | 1503 | rcu_read_unlock(); |
c58c8441 TM |
1504 | } |
1505 | ||
5d422301 TM |
1506 | static void nfs4_state_mark_recovery_failed(struct nfs4_state *state, int error) |
1507 | { | |
1508 | set_bit(NFS_STATE_RECOVERY_FAILED, &state->flags); | |
86dbd08b | 1509 | nfs4_state_mark_open_context_bad(state, error); |
5d422301 TM |
1510 | } |
1511 | ||
a1d0b5ee | 1512 | |
02860014 | 1513 | static int nfs4_reclaim_locks(struct nfs4_state *state, const struct nfs4_state_recovery_ops *ops) |
1da177e4 LT |
1514 | { |
1515 | struct inode *inode = state->inode; | |
19e03c57 | 1516 | struct nfs_inode *nfsi = NFS_I(inode); |
1da177e4 | 1517 | struct file_lock *fl; |
dce2630c | 1518 | struct nfs4_lock_state *lsp; |
1da177e4 | 1519 | int status = 0; |
17b985de | 1520 | struct file_lock_context *flctx = locks_inode_context(inode); |
bd61e0a9 | 1521 | struct list_head *list; |
1da177e4 | 1522 | |
bd61e0a9 | 1523 | if (flctx == NULL) |
3f09df70 TM |
1524 | return 0; |
1525 | ||
bd61e0a9 JL |
1526 | list = &flctx->flc_posix; |
1527 | ||
3f09df70 | 1528 | /* Guard against delegation returns and new lock/unlock calls */ |
19e03c57 | 1529 | down_write(&nfsi->rwsem); |
6109c850 | 1530 | spin_lock(&flctx->flc_lock); |
bd61e0a9 JL |
1531 | restart: |
1532 | list_for_each_entry(fl, list, fl_list) { | |
5263e31e JL |
1533 | if (nfs_file_open_context(fl->fl_file)->state != state) |
1534 | continue; | |
6109c850 | 1535 | spin_unlock(&flctx->flc_lock); |
5263e31e JL |
1536 | status = ops->recover_lock(state, fl); |
1537 | switch (status) { | |
1538 | case 0: | |
1539 | break; | |
67e7b52d | 1540 | case -ETIMEDOUT: |
5263e31e JL |
1541 | case -ESTALE: |
1542 | case -NFS4ERR_ADMIN_REVOKED: | |
1543 | case -NFS4ERR_STALE_STATEID: | |
1544 | case -NFS4ERR_BAD_STATEID: | |
1545 | case -NFS4ERR_EXPIRED: | |
1546 | case -NFS4ERR_NO_GRACE: | |
1547 | case -NFS4ERR_STALE_CLIENTID: | |
1548 | case -NFS4ERR_BADSESSION: | |
1549 | case -NFS4ERR_BADSLOT: | |
1550 | case -NFS4ERR_BAD_HIGH_SLOT: | |
1551 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
1552 | goto out; | |
1553 | default: | |
1554 | pr_err("NFS: %s: unhandled error %d\n", | |
1555 | __func__, status); | |
df561f66 | 1556 | fallthrough; |
5263e31e JL |
1557 | case -ENOMEM: |
1558 | case -NFS4ERR_DENIED: | |
1559 | case -NFS4ERR_RECLAIM_BAD: | |
1560 | case -NFS4ERR_RECLAIM_CONFLICT: | |
dce2630c N |
1561 | lsp = fl->fl_u.nfs4_fl.owner; |
1562 | if (lsp) | |
1563 | set_bit(NFS_LOCK_LOST, &lsp->ls_flags); | |
5263e31e JL |
1564 | status = 0; |
1565 | } | |
6109c850 | 1566 | spin_lock(&flctx->flc_lock); |
5263e31e | 1567 | } |
bd61e0a9 JL |
1568 | if (list == &flctx->flc_posix) { |
1569 | list = &flctx->flc_flock; | |
1570 | goto restart; | |
1571 | } | |
6109c850 | 1572 | spin_unlock(&flctx->flc_lock); |
965b5d67 | 1573 | out: |
19e03c57 | 1574 | up_write(&nfsi->rwsem); |
1da177e4 LT |
1575 | return status; |
1576 | } | |
1577 | ||
80f42368 AS |
1578 | #ifdef CONFIG_NFS_V4_2 |
1579 | static void nfs42_complete_copies(struct nfs4_state_owner *sp, struct nfs4_state *state) | |
1580 | { | |
1581 | struct nfs4_copy_state *copy; | |
1582 | ||
0e65a32c OK |
1583 | if (!test_bit(NFS_CLNT_DST_SSC_COPY_STATE, &state->flags) && |
1584 | !test_bit(NFS_CLNT_SRC_SSC_COPY_STATE, &state->flags)) | |
80f42368 AS |
1585 | return; |
1586 | ||
1587 | spin_lock(&sp->so_server->nfs_client->cl_lock); | |
1588 | list_for_each_entry(copy, &sp->so_server->ss_copies, copies) { | |
0e65a32c OK |
1589 | if ((test_bit(NFS_CLNT_DST_SSC_COPY_STATE, &state->flags) && |
1590 | !nfs4_stateid_match_other(&state->stateid, | |
1591 | ©->parent_dst_state->stateid))) | |
1592 | continue; | |
80f42368 | 1593 | copy->flags = 1; |
0e65a32c OK |
1594 | if (test_and_clear_bit(NFS_CLNT_DST_SSC_COPY_STATE, |
1595 | &state->flags)) { | |
1596 | clear_bit(NFS_CLNT_SRC_SSC_COPY_STATE, &state->flags); | |
1597 | complete(©->completion); | |
1598 | } | |
1599 | } | |
1600 | list_for_each_entry(copy, &sp->so_server->ss_copies, src_copies) { | |
1601 | if ((test_bit(NFS_CLNT_SRC_SSC_COPY_STATE, &state->flags) && | |
1602 | !nfs4_stateid_match_other(&state->stateid, | |
1603 | ©->parent_src_state->stateid))) | |
1604 | continue; | |
1605 | copy->flags = 1; | |
1606 | if (test_and_clear_bit(NFS_CLNT_DST_SSC_COPY_STATE, | |
1607 | &state->flags)) | |
1608 | complete(©->completion); | |
80f42368 AS |
1609 | } |
1610 | spin_unlock(&sp->so_server->nfs_client->cl_lock); | |
1611 | } | |
1612 | #else /* !CONFIG_NFS_V4_2 */ | |
1613 | static inline void nfs42_complete_copies(struct nfs4_state_owner *sp, | |
1614 | struct nfs4_state *state) | |
1615 | { | |
1616 | } | |
1617 | #endif /* CONFIG_NFS_V4_2 */ | |
1618 | ||
cb7a8384 | 1619 | static int __nfs4_reclaim_open_state(struct nfs4_state_owner *sp, struct nfs4_state *state, |
3e2910c7 N |
1620 | const struct nfs4_state_recovery_ops *ops, |
1621 | int *lost_locks) | |
cb7a8384 AS |
1622 | { |
1623 | struct nfs4_lock_state *lock; | |
1624 | int status; | |
1625 | ||
1626 | status = ops->recover_open(sp, state); | |
1627 | if (status < 0) | |
1628 | return status; | |
1629 | ||
1630 | status = nfs4_reclaim_locks(state, ops); | |
1631 | if (status < 0) | |
1632 | return status; | |
1633 | ||
1634 | if (!test_bit(NFS_DELEGATED_STATE, &state->flags)) { | |
1635 | spin_lock(&state->state_lock); | |
1636 | list_for_each_entry(lock, &state->lock_states, ls_locks) { | |
21f86d2d | 1637 | trace_nfs4_state_lock_reclaim(state, lock); |
ef8d98f2 N |
1638 | if (!test_bit(NFS_LOCK_INITIALIZED, &lock->ls_flags) && |
1639 | !test_bit(NFS_LOCK_UNLOCKING, &lock->ls_flags)) | |
3e2910c7 | 1640 | *lost_locks += 1; |
cb7a8384 AS |
1641 | } |
1642 | spin_unlock(&state->state_lock); | |
1643 | } | |
1644 | ||
80f42368 | 1645 | nfs42_complete_copies(sp, state); |
cb7a8384 AS |
1646 | clear_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags); |
1647 | return status; | |
1648 | } | |
1649 | ||
3e2910c7 N |
1650 | static int nfs4_reclaim_open_state(struct nfs4_state_owner *sp, |
1651 | const struct nfs4_state_recovery_ops *ops, | |
1652 | int *lost_locks) | |
1da177e4 LT |
1653 | { |
1654 | struct nfs4_state *state; | |
c34fae00 | 1655 | unsigned int loop = 0; |
1da177e4 | 1656 | int status = 0; |
0b9018b9 OK |
1657 | #ifdef CONFIG_NFS_V4_2 |
1658 | bool found_ssc_copy_state = false; | |
1659 | #endif /* CONFIG_NFS_V4_2 */ | |
1da177e4 LT |
1660 | |
1661 | /* Note: we rely on the sp->so_states list being ordered | |
1662 | * so that we always reclaim open(O_RDWR) and/or open(O_WRITE) | |
1663 | * states first. | |
1664 | * This is needed to ensure that the server won't give us any | |
1665 | * read delegations that we have to return if, say, we are | |
1666 | * recovering after a network partition or a reboot from a | |
1667 | * server that doesn't support a grace period. | |
1668 | */ | |
fe1d8195 | 1669 | spin_lock(&sp->so_lock); |
abbec2da | 1670 | raw_write_seqcount_begin(&sp->so_reclaim_seqcount); |
c137afab | 1671 | restart: |
1da177e4 | 1672 | list_for_each_entry(state, &sp->so_states, open_states) { |
b79a4a1b TM |
1673 | if (!test_and_clear_bit(ops->state_flag_bit, &state->flags)) |
1674 | continue; | |
5d422301 TM |
1675 | if (!nfs4_valid_open_stateid(state)) |
1676 | continue; | |
1da177e4 LT |
1677 | if (state->state == 0) |
1678 | continue; | |
0b9018b9 OK |
1679 | #ifdef CONFIG_NFS_V4_2 |
1680 | if (test_bit(NFS_SRV_SSC_COPY_STATE, &state->flags)) { | |
1681 | nfs4_state_mark_recovery_failed(state, -EIO); | |
1682 | found_ssc_copy_state = true; | |
1683 | continue; | |
1684 | } | |
1685 | #endif /* CONFIG_NFS_V4_2 */ | |
ace9fad4 | 1686 | refcount_inc(&state->count); |
fe1d8195 | 1687 | spin_unlock(&sp->so_lock); |
3e2910c7 | 1688 | status = __nfs4_reclaim_open_state(sp, state, ops, lost_locks); |
cb7a8384 | 1689 | |
1da177e4 | 1690 | switch (status) { |
35a61606 | 1691 | default: |
c34fae00 TM |
1692 | if (status >= 0) { |
1693 | loop = 0; | |
b79a4a1b | 1694 | break; |
c34fae00 | 1695 | } |
35a61606 | 1696 | printk(KERN_ERR "NFS: %s: unhandled error %d\n", __func__, status); |
df561f66 | 1697 | fallthrough; |
35a61606 AS |
1698 | case -ENOENT: |
1699 | case -ENOMEM: | |
1700 | case -EACCES: | |
1701 | case -EROFS: | |
1702 | case -EIO: | |
1703 | case -ESTALE: | |
1704 | /* Open state on this file cannot be recovered */ | |
1705 | nfs4_state_mark_recovery_failed(state, status); | |
1706 | break; | |
1707 | case -EAGAIN: | |
1708 | ssleep(1); | |
c34fae00 TM |
1709 | if (loop++ < 10) { |
1710 | set_bit(ops->state_flag_bit, &state->flags); | |
1711 | break; | |
1712 | } | |
df561f66 | 1713 | fallthrough; |
35a61606 AS |
1714 | case -NFS4ERR_ADMIN_REVOKED: |
1715 | case -NFS4ERR_STALE_STATEID: | |
1716 | case -NFS4ERR_OLD_STATEID: | |
1717 | case -NFS4ERR_BAD_STATEID: | |
1718 | case -NFS4ERR_RECLAIM_BAD: | |
1719 | case -NFS4ERR_RECLAIM_CONFLICT: | |
1720 | nfs4_state_mark_reclaim_nograce(sp->so_server->nfs_client, state); | |
1721 | break; | |
1722 | case -NFS4ERR_EXPIRED: | |
1723 | case -NFS4ERR_NO_GRACE: | |
1724 | nfs4_state_mark_reclaim_nograce(sp->so_server->nfs_client, state); | |
df561f66 | 1725 | fallthrough; |
35a61606 AS |
1726 | case -NFS4ERR_STALE_CLIENTID: |
1727 | case -NFS4ERR_BADSESSION: | |
1728 | case -NFS4ERR_BADSLOT: | |
1729 | case -NFS4ERR_BAD_HIGH_SLOT: | |
1730 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
67e7b52d | 1731 | case -ETIMEDOUT: |
35a61606 | 1732 | goto out_err; |
1da177e4 | 1733 | } |
fe1d8195 | 1734 | nfs4_put_open_state(state); |
c137afab | 1735 | spin_lock(&sp->so_lock); |
fe1d8195 | 1736 | goto restart; |
1da177e4 | 1737 | } |
abbec2da | 1738 | raw_write_seqcount_end(&sp->so_reclaim_seqcount); |
fe1d8195 | 1739 | spin_unlock(&sp->so_lock); |
0b9018b9 OK |
1740 | #ifdef CONFIG_NFS_V4_2 |
1741 | if (found_ssc_copy_state) | |
1742 | return -EIO; | |
1743 | #endif /* CONFIG_NFS_V4_2 */ | |
1da177e4 LT |
1744 | return 0; |
1745 | out_err: | |
fe1d8195 | 1746 | nfs4_put_open_state(state); |
c137afab | 1747 | spin_lock(&sp->so_lock); |
abbec2da | 1748 | raw_write_seqcount_end(&sp->so_reclaim_seqcount); |
c137afab | 1749 | spin_unlock(&sp->so_lock); |
1da177e4 LT |
1750 | return status; |
1751 | } | |
1752 | ||
b79a4a1b TM |
1753 | static void nfs4_clear_open_state(struct nfs4_state *state) |
1754 | { | |
1755 | struct nfs4_lock_state *lock; | |
1756 | ||
1757 | clear_bit(NFS_DELEGATED_STATE, &state->flags); | |
1758 | clear_bit(NFS_O_RDONLY_STATE, &state->flags); | |
1759 | clear_bit(NFS_O_WRONLY_STATE, &state->flags); | |
1760 | clear_bit(NFS_O_RDWR_STATE, &state->flags); | |
4b44b40e | 1761 | spin_lock(&state->state_lock); |
b79a4a1b | 1762 | list_for_each_entry(lock, &state->lock_states, ls_locks) { |
b79a4a1b | 1763 | lock->ls_seqid.flags = 0; |
795a88c9 | 1764 | clear_bit(NFS_LOCK_INITIALIZED, &lock->ls_flags); |
b79a4a1b | 1765 | } |
4b44b40e | 1766 | spin_unlock(&state->state_lock); |
b79a4a1b TM |
1767 | } |
1768 | ||
24d292b8 CL |
1769 | static void nfs4_reset_seqids(struct nfs_server *server, |
1770 | int (*mark_reclaim)(struct nfs_client *clp, struct nfs4_state *state)) | |
cee54fc9 | 1771 | { |
24d292b8 | 1772 | struct nfs_client *clp = server->nfs_client; |
cee54fc9 | 1773 | struct nfs4_state_owner *sp; |
9f958ab8 | 1774 | struct rb_node *pos; |
cee54fc9 | 1775 | struct nfs4_state *state; |
cee54fc9 | 1776 | |
24d292b8 CL |
1777 | spin_lock(&clp->cl_lock); |
1778 | for (pos = rb_first(&server->state_owners); | |
1779 | pos != NULL; | |
1780 | pos = rb_next(pos)) { | |
1781 | sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); | |
cee54fc9 | 1782 | sp->so_seqid.flags = 0; |
ec073428 | 1783 | spin_lock(&sp->so_lock); |
cee54fc9 | 1784 | list_for_each_entry(state, &sp->so_states, open_states) { |
b79a4a1b TM |
1785 | if (mark_reclaim(clp, state)) |
1786 | nfs4_clear_open_state(state); | |
cee54fc9 | 1787 | } |
ec073428 | 1788 | spin_unlock(&sp->so_lock); |
cee54fc9 | 1789 | } |
24d292b8 CL |
1790 | spin_unlock(&clp->cl_lock); |
1791 | } | |
1792 | ||
1793 | static void nfs4_state_mark_reclaim_helper(struct nfs_client *clp, | |
1794 | int (*mark_reclaim)(struct nfs_client *clp, struct nfs4_state *state)) | |
1795 | { | |
1796 | struct nfs_server *server; | |
1797 | ||
1798 | rcu_read_lock(); | |
1799 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) | |
1800 | nfs4_reset_seqids(server, mark_reclaim); | |
1801 | rcu_read_unlock(); | |
cee54fc9 TM |
1802 | } |
1803 | ||
b79a4a1b TM |
1804 | static void nfs4_state_start_reclaim_reboot(struct nfs_client *clp) |
1805 | { | |
e59679f2 | 1806 | set_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state); |
b79a4a1b TM |
1807 | /* Mark all delegations for reclaim */ |
1808 | nfs_delegation_mark_reclaim(clp); | |
1809 | nfs4_state_mark_reclaim_helper(clp, nfs4_state_mark_reclaim_reboot); | |
1810 | } | |
1811 | ||
0048fdd0 | 1812 | static int nfs4_reclaim_complete(struct nfs_client *clp, |
965e9c23 | 1813 | const struct nfs4_state_recovery_ops *ops, |
a52458b4 | 1814 | const struct cred *cred) |
fce5c838 RL |
1815 | { |
1816 | /* Notify the server we're done reclaiming our state */ | |
1817 | if (ops->reclaim_complete) | |
0048fdd0 TM |
1818 | return ops->reclaim_complete(clp, cred); |
1819 | return 0; | |
fce5c838 RL |
1820 | } |
1821 | ||
24d292b8 | 1822 | static void nfs4_clear_reclaim_server(struct nfs_server *server) |
b79a4a1b | 1823 | { |
24d292b8 | 1824 | struct nfs_client *clp = server->nfs_client; |
b79a4a1b TM |
1825 | struct nfs4_state_owner *sp; |
1826 | struct rb_node *pos; | |
1827 | struct nfs4_state *state; | |
1828 | ||
24d292b8 CL |
1829 | spin_lock(&clp->cl_lock); |
1830 | for (pos = rb_first(&server->state_owners); | |
1831 | pos != NULL; | |
1832 | pos = rb_next(pos)) { | |
1833 | sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); | |
b79a4a1b TM |
1834 | spin_lock(&sp->so_lock); |
1835 | list_for_each_entry(state, &sp->so_states, open_states) { | |
24d292b8 CL |
1836 | if (!test_and_clear_bit(NFS_STATE_RECLAIM_REBOOT, |
1837 | &state->flags)) | |
b79a4a1b TM |
1838 | continue; |
1839 | nfs4_state_mark_reclaim_nograce(clp, state); | |
1840 | } | |
1841 | spin_unlock(&sp->so_lock); | |
1842 | } | |
24d292b8 CL |
1843 | spin_unlock(&clp->cl_lock); |
1844 | } | |
1845 | ||
1846 | static int nfs4_state_clear_reclaim_reboot(struct nfs_client *clp) | |
1847 | { | |
1848 | struct nfs_server *server; | |
1849 | ||
1850 | if (!test_and_clear_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) | |
1851 | return 0; | |
1852 | ||
1853 | rcu_read_lock(); | |
1854 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) | |
1855 | nfs4_clear_reclaim_server(server); | |
1856 | rcu_read_unlock(); | |
b79a4a1b TM |
1857 | |
1858 | nfs_delegation_reap_unclaimed(clp); | |
6eaa6149 TM |
1859 | return 1; |
1860 | } | |
1861 | ||
1862 | static void nfs4_state_end_reclaim_reboot(struct nfs_client *clp) | |
1863 | { | |
965e9c23 | 1864 | const struct nfs4_state_recovery_ops *ops; |
a52458b4 | 1865 | const struct cred *cred; |
0048fdd0 | 1866 | int err; |
965e9c23 | 1867 | |
6eaa6149 TM |
1868 | if (!nfs4_state_clear_reclaim_reboot(clp)) |
1869 | return; | |
965e9c23 | 1870 | ops = clp->cl_mvops->reboot_recovery_ops; |
73d8bde5 | 1871 | cred = nfs4_get_clid_cred(clp); |
0048fdd0 | 1872 | err = nfs4_reclaim_complete(clp, ops, cred); |
a52458b4 | 1873 | put_cred(cred); |
0048fdd0 TM |
1874 | if (err == -NFS4ERR_CONN_NOT_BOUND_TO_SESSION) |
1875 | set_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state); | |
b79a4a1b TM |
1876 | } |
1877 | ||
b79a4a1b TM |
1878 | static void nfs4_state_start_reclaim_nograce(struct nfs_client *clp) |
1879 | { | |
45870d69 | 1880 | nfs_mark_test_expired_all_delegations(clp); |
b79a4a1b TM |
1881 | nfs4_state_mark_reclaim_helper(clp, nfs4_state_mark_reclaim_nograce); |
1882 | } | |
1883 | ||
4f7cdf18 | 1884 | static int nfs4_recovery_handle_error(struct nfs_client *clp, int error) |
e598d843 TM |
1885 | { |
1886 | switch (error) { | |
000d3f95 AS |
1887 | case 0: |
1888 | break; | |
1889 | case -NFS4ERR_CB_PATH_DOWN: | |
1890 | nfs40_handle_cb_pathdown(clp); | |
1891 | break; | |
1892 | case -NFS4ERR_NO_GRACE: | |
1893 | nfs4_state_end_reclaim_reboot(clp); | |
1894 | break; | |
1895 | case -NFS4ERR_STALE_CLIENTID: | |
1896 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1897 | nfs4_state_start_reclaim_reboot(clp); | |
1898 | break; | |
1899 | case -NFS4ERR_EXPIRED: | |
1900 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1901 | nfs4_state_start_reclaim_nograce(clp); | |
1902 | break; | |
1903 | case -NFS4ERR_BADSESSION: | |
1904 | case -NFS4ERR_BADSLOT: | |
1905 | case -NFS4ERR_BAD_HIGH_SLOT: | |
1906 | case -NFS4ERR_DEADSESSION: | |
1907 | case -NFS4ERR_SEQ_FALSE_RETRY: | |
1908 | case -NFS4ERR_SEQ_MISORDERED: | |
1909 | set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); | |
1910 | /* Zero session reset errors */ | |
1911 | break; | |
1912 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
1913 | set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); | |
1914 | break; | |
1915 | default: | |
1916 | dprintk("%s: failed to handle error %d for server %s\n", | |
1917 | __func__, error, clp->cl_hostname); | |
1918 | return error; | |
e598d843 | 1919 | } |
cc0a9843 TM |
1920 | dprintk("%s: handled error %d for server %s\n", __func__, error, |
1921 | clp->cl_hostname); | |
4f38e4aa | 1922 | return 0; |
e598d843 TM |
1923 | } |
1924 | ||
02860014 | 1925 | static int nfs4_do_reclaim(struct nfs_client *clp, const struct nfs4_state_recovery_ops *ops) |
1da177e4 | 1926 | { |
24d292b8 CL |
1927 | struct nfs4_state_owner *sp; |
1928 | struct nfs_server *server; | |
9f958ab8 | 1929 | struct rb_node *pos; |
c77e2283 | 1930 | LIST_HEAD(freeme); |
1da177e4 | 1931 | int status = 0; |
3e2910c7 | 1932 | int lost_locks = 0; |
1da177e4 | 1933 | |
7eff03ae | 1934 | restart: |
24d292b8 CL |
1935 | rcu_read_lock(); |
1936 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { | |
c77e2283 | 1937 | nfs4_purge_state_owners(server, &freeme); |
24d292b8 CL |
1938 | spin_lock(&clp->cl_lock); |
1939 | for (pos = rb_first(&server->state_owners); | |
1940 | pos != NULL; | |
1941 | pos = rb_next(pos)) { | |
1942 | sp = rb_entry(pos, | |
1943 | struct nfs4_state_owner, so_server_node); | |
1944 | if (!test_and_clear_bit(ops->owner_flag_bit, | |
1945 | &sp->so_flags)) | |
1946 | continue; | |
4a0954ef TM |
1947 | if (!atomic_inc_not_zero(&sp->so_count)) |
1948 | continue; | |
24d292b8 CL |
1949 | spin_unlock(&clp->cl_lock); |
1950 | rcu_read_unlock(); | |
1951 | ||
3e2910c7 | 1952 | status = nfs4_reclaim_open_state(sp, ops, &lost_locks); |
24d292b8 | 1953 | if (status < 0) { |
3e2910c7 N |
1954 | if (lost_locks) |
1955 | pr_warn("NFS: %s: lost %d locks\n", | |
1956 | clp->cl_hostname, lost_locks); | |
24d292b8 CL |
1957 | set_bit(ops->owner_flag_bit, &sp->so_flags); |
1958 | nfs4_put_state_owner(sp); | |
df817ba3 TM |
1959 | status = nfs4_recovery_handle_error(clp, status); |
1960 | return (status != 0) ? status : -EAGAIN; | |
24d292b8 CL |
1961 | } |
1962 | ||
7eff03ae | 1963 | nfs4_put_state_owner(sp); |
24d292b8 | 1964 | goto restart; |
7eff03ae | 1965 | } |
24d292b8 | 1966 | spin_unlock(&clp->cl_lock); |
02860014 | 1967 | } |
24d292b8 | 1968 | rcu_read_unlock(); |
c77e2283 | 1969 | nfs4_free_state_owners(&freeme); |
3e2910c7 N |
1970 | if (lost_locks) |
1971 | pr_warn("NFS: %s: lost %d locks\n", | |
1972 | clp->cl_hostname, lost_locks); | |
df817ba3 | 1973 | return 0; |
02860014 TM |
1974 | } |
1975 | ||
1976 | static int nfs4_check_lease(struct nfs_client *clp) | |
1977 | { | |
a52458b4 | 1978 | const struct cred *cred; |
c48f4f35 TM |
1979 | const struct nfs4_state_maintenance_ops *ops = |
1980 | clp->cl_mvops->state_renewal_ops; | |
4f38e4aa | 1981 | int status; |
1da177e4 | 1982 | |
0f605b56 TM |
1983 | /* Is the client already known to have an expired lease? */ |
1984 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) | |
1985 | return 0; | |
f15e1e8b | 1986 | cred = ops->get_state_renewal_cred(clp); |
0f605b56 | 1987 | if (cred == NULL) { |
73d8bde5 | 1988 | cred = nfs4_get_clid_cred(clp); |
4f38e4aa | 1989 | status = -ENOKEY; |
0f605b56 TM |
1990 | if (cred == NULL) |
1991 | goto out; | |
286d7d6a | 1992 | } |
8e69514f | 1993 | status = ops->renew_lease(clp, cred); |
a52458b4 | 1994 | put_cred(cred); |
bc7a05ca TM |
1995 | if (status == -ETIMEDOUT) { |
1996 | set_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); | |
1997 | return 0; | |
1998 | } | |
0f605b56 | 1999 | out: |
4f7cdf18 | 2000 | return nfs4_recovery_handle_error(clp, status); |
02860014 TM |
2001 | } |
2002 | ||
47b803c8 AA |
2003 | /* Set NFS4CLNT_LEASE_EXPIRED and reclaim reboot state for all v4.0 errors |
2004 | * and for recoverable errors on EXCHANGE_ID for v4.1 | |
2a6ee6aa TM |
2005 | */ |
2006 | static int nfs4_handle_reclaim_lease_error(struct nfs_client *clp, int status) | |
2007 | { | |
2008 | switch (status) { | |
89a21736 TM |
2009 | case -NFS4ERR_SEQ_MISORDERED: |
2010 | if (test_and_set_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) | |
2011 | return -ESERVERFAULT; | |
2012 | /* Lease confirmation error: retry after purging the lease */ | |
2013 | ssleep(1); | |
47b803c8 AA |
2014 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
2015 | break; | |
2a6ee6aa TM |
2016 | case -NFS4ERR_STALE_CLIENTID: |
2017 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); | |
47b803c8 | 2018 | nfs4_state_start_reclaim_reboot(clp); |
2a6ee6aa | 2019 | break; |
de734831 CL |
2020 | case -NFS4ERR_CLID_INUSE: |
2021 | pr_err("NFS: Server %s reports our clientid is in use\n", | |
2022 | clp->cl_hostname); | |
2023 | nfs_mark_client_ready(clp, -EPERM); | |
2024 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); | |
2025 | return -EPERM; | |
2a6ee6aa | 2026 | case -EACCES: |
2a6ee6aa | 2027 | case -NFS4ERR_DELAY: |
2a6ee6aa TM |
2028 | case -EAGAIN: |
2029 | ssleep(1); | |
2030 | break; | |
2031 | ||
2032 | case -NFS4ERR_MINOR_VERS_MISMATCH: | |
2033 | if (clp->cl_cons_state == NFS_CS_SESSION_INITING) | |
2034 | nfs_mark_client_ready(clp, -EPROTONOSUPPORT); | |
cc0a9843 TM |
2035 | dprintk("%s: exit with error %d for server %s\n", |
2036 | __func__, -EPROTONOSUPPORT, clp->cl_hostname); | |
2a6ee6aa | 2037 | return -EPROTONOSUPPORT; |
ea027cb2 OK |
2038 | case -ENOSPC: |
2039 | if (clp->cl_cons_state == NFS_CS_SESSION_INITING) | |
2040 | nfs_mark_client_ready(clp, -EIO); | |
2041 | return -EIO; | |
2a6ee6aa TM |
2042 | case -NFS4ERR_NOT_SAME: /* FixMe: implement recovery |
2043 | * in nfs4_exchange_id */ | |
2044 | default: | |
cc0a9843 TM |
2045 | dprintk("%s: exit with error %d for server %s\n", __func__, |
2046 | status, clp->cl_hostname); | |
2a6ee6aa TM |
2047 | return status; |
2048 | } | |
2049 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
cc0a9843 TM |
2050 | dprintk("%s: handled error %d for server %s\n", __func__, status, |
2051 | clp->cl_hostname); | |
2a6ee6aa TM |
2052 | return 0; |
2053 | } | |
2054 | ||
b42353ff | 2055 | static int nfs4_establish_lease(struct nfs_client *clp) |
02860014 | 2056 | { |
a52458b4 | 2057 | const struct cred *cred; |
c48f4f35 TM |
2058 | const struct nfs4_state_recovery_ops *ops = |
2059 | clp->cl_mvops->reboot_recovery_ops; | |
2a6ee6aa | 2060 | int status; |
02860014 | 2061 | |
8aafd2fd TM |
2062 | status = nfs4_begin_drain_session(clp); |
2063 | if (status != 0) | |
2064 | return status; | |
73d8bde5 | 2065 | cred = nfs4_get_clid_cred(clp); |
2a6ee6aa TM |
2066 | if (cred == NULL) |
2067 | return -ENOENT; | |
2068 | status = ops->establish_clid(clp, cred); | |
a52458b4 | 2069 | put_cred(cred); |
2a6ee6aa | 2070 | if (status != 0) |
b42353ff TM |
2071 | return status; |
2072 | pnfs_destroy_all_layouts(clp); | |
2073 | return 0; | |
2074 | } | |
2075 | ||
6bbb4ae8 CL |
2076 | /* |
2077 | * Returns zero or a negative errno. NFS4ERR values are converted | |
2078 | * to local errno values. | |
2079 | */ | |
b42353ff TM |
2080 | static int nfs4_reclaim_lease(struct nfs_client *clp) |
2081 | { | |
2082 | int status; | |
2083 | ||
2084 | status = nfs4_establish_lease(clp); | |
2085 | if (status < 0) | |
2086 | return nfs4_handle_reclaim_lease_error(clp, status); | |
2087 | if (test_and_clear_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state)) | |
2088 | nfs4_state_start_reclaim_nograce(clp); | |
2089 | if (!test_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) | |
2090 | set_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state); | |
2091 | clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); | |
2092 | clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
2093 | return 0; | |
2094 | } | |
2095 | ||
2096 | static int nfs4_purge_lease(struct nfs_client *clp) | |
2097 | { | |
2098 | int status; | |
2099 | ||
2100 | status = nfs4_establish_lease(clp); | |
2101 | if (status < 0) | |
2a6ee6aa | 2102 | return nfs4_handle_reclaim_lease_error(clp, status); |
b42353ff TM |
2103 | clear_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state); |
2104 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
2105 | nfs4_state_start_reclaim_nograce(clp); | |
2a6ee6aa | 2106 | return 0; |
02860014 TM |
2107 | } |
2108 | ||
c9fdeb28 CL |
2109 | /* |
2110 | * Try remote migration of one FSID from a source server to a | |
2111 | * destination server. The source server provides a list of | |
2112 | * potential destinations. | |
2113 | * | |
2114 | * Returns zero or a negative NFS4ERR status code. | |
2115 | */ | |
a52458b4 | 2116 | static int nfs4_try_migration(struct nfs_server *server, const struct cred *cred) |
c9fdeb28 CL |
2117 | { |
2118 | struct nfs_client *clp = server->nfs_client; | |
2119 | struct nfs4_fs_locations *locations = NULL; | |
2120 | struct inode *inode; | |
2121 | struct page *page; | |
2122 | int status, result; | |
2123 | ||
2124 | dprintk("--> %s: FSID %llx:%llx on \"%s\"\n", __func__, | |
2125 | (unsigned long long)server->fsid.major, | |
2126 | (unsigned long long)server->fsid.minor, | |
2127 | clp->cl_hostname); | |
2128 | ||
2129 | result = 0; | |
2130 | page = alloc_page(GFP_KERNEL); | |
2131 | locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL); | |
2132 | if (page == NULL || locations == NULL) { | |
2133 | dprintk("<-- %s: no memory\n", __func__); | |
2134 | goto out; | |
2135 | } | |
c3ed2227 BC |
2136 | locations->fattr = nfs_alloc_fattr(); |
2137 | if (locations->fattr == NULL) { | |
2138 | dprintk("<-- %s: no memory\n", __func__); | |
2139 | goto out; | |
2140 | } | |
c9fdeb28 | 2141 | |
2b0143b5 | 2142 | inode = d_inode(server->super->s_root); |
1976b2b3 OK |
2143 | result = nfs4_proc_get_locations(server, NFS_FH(inode), locations, |
2144 | page, cred); | |
c9fdeb28 CL |
2145 | if (result) { |
2146 | dprintk("<-- %s: failed to retrieve fs_locations: %d\n", | |
2147 | __func__, result); | |
2148 | goto out; | |
2149 | } | |
2150 | ||
2151 | result = -NFS4ERR_NXIO; | |
90e12a31 OK |
2152 | if (!locations->nlocations) |
2153 | goto out; | |
2154 | ||
c3ed2227 | 2155 | if (!(locations->fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)) { |
c9fdeb28 CL |
2156 | dprintk("<-- %s: No fs_locations data, migration skipped\n", |
2157 | __func__); | |
2158 | goto out; | |
2159 | } | |
2160 | ||
8aafd2fd | 2161 | status = nfs4_begin_drain_session(clp); |
1e672e36 WW |
2162 | if (status != 0) { |
2163 | result = status; | |
2164 | goto out; | |
2165 | } | |
c9fdeb28 CL |
2166 | |
2167 | status = nfs4_replace_transport(server, locations); | |
2168 | if (status != 0) { | |
2169 | dprintk("<-- %s: failed to replace transport: %d\n", | |
2170 | __func__, status); | |
2171 | goto out; | |
2172 | } | |
2173 | ||
2174 | result = 0; | |
2175 | dprintk("<-- %s: migration succeeded\n", __func__); | |
2176 | ||
2177 | out: | |
2178 | if (page != NULL) | |
2179 | __free_page(page); | |
c3ed2227 BC |
2180 | if (locations != NULL) |
2181 | kfree(locations->fattr); | |
c9fdeb28 CL |
2182 | kfree(locations); |
2183 | if (result) { | |
2184 | pr_err("NFS: migration recovery failed (server %s)\n", | |
2185 | clp->cl_hostname); | |
2186 | set_bit(NFS_MIG_FAILED, &server->mig_status); | |
2187 | } | |
2188 | return result; | |
2189 | } | |
2190 | ||
2191 | /* | |
2192 | * Returns zero or a negative NFS4ERR status code. | |
2193 | */ | |
2194 | static int nfs4_handle_migration(struct nfs_client *clp) | |
2195 | { | |
2196 | const struct nfs4_state_maintenance_ops *ops = | |
2197 | clp->cl_mvops->state_renewal_ops; | |
2198 | struct nfs_server *server; | |
a52458b4 | 2199 | const struct cred *cred; |
c9fdeb28 CL |
2200 | |
2201 | dprintk("%s: migration reported on \"%s\"\n", __func__, | |
2202 | clp->cl_hostname); | |
2203 | ||
f15e1e8b | 2204 | cred = ops->get_state_renewal_cred(clp); |
c9fdeb28 CL |
2205 | if (cred == NULL) |
2206 | return -NFS4ERR_NOENT; | |
2207 | ||
2208 | clp->cl_mig_gen++; | |
2209 | restart: | |
2210 | rcu_read_lock(); | |
2211 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { | |
2212 | int status; | |
2213 | ||
2214 | if (server->mig_gen == clp->cl_mig_gen) | |
2215 | continue; | |
2216 | server->mig_gen = clp->cl_mig_gen; | |
2217 | ||
2218 | if (!test_and_clear_bit(NFS_MIG_IN_TRANSITION, | |
2219 | &server->mig_status)) | |
2220 | continue; | |
2221 | ||
2222 | rcu_read_unlock(); | |
2223 | status = nfs4_try_migration(server, cred); | |
2224 | if (status < 0) { | |
a52458b4 | 2225 | put_cred(cred); |
c9fdeb28 CL |
2226 | return status; |
2227 | } | |
2228 | goto restart; | |
2229 | } | |
2230 | rcu_read_unlock(); | |
a52458b4 | 2231 | put_cred(cred); |
c9fdeb28 CL |
2232 | return 0; |
2233 | } | |
2234 | ||
b7f7a66e CL |
2235 | /* |
2236 | * Test each nfs_server on the clp's cl_superblocks list to see | |
2237 | * if it's moved to another server. Stop when the server no longer | |
2238 | * returns NFS4ERR_LEASE_MOVED. | |
2239 | */ | |
2240 | static int nfs4_handle_lease_moved(struct nfs_client *clp) | |
2241 | { | |
2242 | const struct nfs4_state_maintenance_ops *ops = | |
2243 | clp->cl_mvops->state_renewal_ops; | |
2244 | struct nfs_server *server; | |
a52458b4 | 2245 | const struct cred *cred; |
b7f7a66e CL |
2246 | |
2247 | dprintk("%s: lease moved reported on \"%s\"\n", __func__, | |
2248 | clp->cl_hostname); | |
2249 | ||
f15e1e8b | 2250 | cred = ops->get_state_renewal_cred(clp); |
b7f7a66e CL |
2251 | if (cred == NULL) |
2252 | return -NFS4ERR_NOENT; | |
2253 | ||
2254 | clp->cl_mig_gen++; | |
2255 | restart: | |
2256 | rcu_read_lock(); | |
2257 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { | |
2258 | struct inode *inode; | |
2259 | int status; | |
2260 | ||
2261 | if (server->mig_gen == clp->cl_mig_gen) | |
2262 | continue; | |
2263 | server->mig_gen = clp->cl_mig_gen; | |
2264 | ||
2265 | rcu_read_unlock(); | |
2266 | ||
2b0143b5 | 2267 | inode = d_inode(server->super->s_root); |
b7f7a66e CL |
2268 | status = nfs4_proc_fsid_present(inode, cred); |
2269 | if (status != -NFS4ERR_MOVED) | |
2270 | goto restart; /* wasn't this one */ | |
2271 | if (nfs4_try_migration(server, cred) == -NFS4ERR_LEASE_MOVED) | |
2272 | goto restart; /* there are more */ | |
2273 | goto out; | |
2274 | } | |
2275 | rcu_read_unlock(); | |
2276 | ||
2277 | out: | |
a52458b4 | 2278 | put_cred(cred); |
b7f7a66e CL |
2279 | return 0; |
2280 | } | |
2281 | ||
05f4c350 CL |
2282 | /** |
2283 | * nfs4_discover_server_trunking - Detect server IP address trunking | |
2284 | * | |
2285 | * @clp: nfs_client under test | |
2286 | * @result: OUT: found nfs_client, or clp | |
2287 | * | |
2288 | * Returns zero or a negative errno. If zero is returned, | |
2289 | * an nfs_client pointer is planted in "result". | |
2290 | * | |
2291 | * Note: since we are invoked in process context, and | |
2292 | * not from inside the state manager, we cannot use | |
2293 | * nfs4_handle_reclaim_lease_error(). | |
2294 | */ | |
2295 | int nfs4_discover_server_trunking(struct nfs_client *clp, | |
2296 | struct nfs_client **result) | |
2297 | { | |
2298 | const struct nfs4_state_recovery_ops *ops = | |
2299 | clp->cl_mvops->reboot_recovery_ops; | |
05f4c350 | 2300 | struct rpc_clnt *clnt; |
a52458b4 | 2301 | const struct cred *cred; |
4edaa308 | 2302 | int i, status; |
05f4c350 CL |
2303 | |
2304 | dprintk("NFS: %s: testing '%s'\n", __func__, clp->cl_hostname); | |
2305 | ||
05f4c350 | 2306 | clnt = clp->cl_rpcclient; |
05f4c350 CL |
2307 | i = 0; |
2308 | ||
2309 | mutex_lock(&nfs_clid_init_mutex); | |
05f4c350 | 2310 | again: |
ea33e6c3 | 2311 | status = -ENOENT; |
73d8bde5 | 2312 | cred = nfs4_get_clid_cred(clp); |
05f4c350 CL |
2313 | if (cred == NULL) |
2314 | goto out_unlock; | |
2315 | ||
2316 | status = ops->detect_trunking(clp, result, cred); | |
a52458b4 | 2317 | put_cred(cred); |
05f4c350 CL |
2318 | switch (status) { |
2319 | case 0: | |
898fc11b TM |
2320 | case -EINTR: |
2321 | case -ERESTARTSYS: | |
05f4c350 | 2322 | break; |
05f4c350 | 2323 | case -ETIMEDOUT: |
150e7260 TM |
2324 | if (clnt->cl_softrtry) |
2325 | break; | |
df561f66 | 2326 | fallthrough; |
150e7260 | 2327 | case -NFS4ERR_DELAY: |
05f4c350 CL |
2328 | case -EAGAIN: |
2329 | ssleep(1); | |
df561f66 | 2330 | fallthrough; |
202c312d | 2331 | case -NFS4ERR_STALE_CLIENTID: |
05f4c350 CL |
2332 | dprintk("NFS: %s after status %d, retrying\n", |
2333 | __func__, status); | |
2334 | goto again; | |
4edaa308 | 2335 | case -EACCES: |
d688f7b8 CL |
2336 | if (i++ == 0) { |
2337 | nfs4_root_machine_cred(clp); | |
2338 | goto again; | |
2339 | } | |
6d769f1e | 2340 | if (clnt->cl_auth->au_flavor == RPC_AUTH_UNIX) |
4edaa308 | 2341 | break; |
df561f66 | 2342 | fallthrough; |
05f4c350 CL |
2343 | case -NFS4ERR_CLID_INUSE: |
2344 | case -NFS4ERR_WRONGSEC: | |
6d769f1e JL |
2345 | /* No point in retrying if we already used RPC_AUTH_UNIX */ |
2346 | if (clnt->cl_auth->au_flavor == RPC_AUTH_UNIX) { | |
2347 | status = -EPERM; | |
2348 | break; | |
2349 | } | |
79d852bf | 2350 | clnt = rpc_clone_client_set_auth(clnt, RPC_AUTH_UNIX); |
05f4c350 CL |
2351 | if (IS_ERR(clnt)) { |
2352 | status = PTR_ERR(clnt); | |
2353 | break; | |
2354 | } | |
b193d59a TM |
2355 | /* Note: this is safe because we haven't yet marked the |
2356 | * client as ready, so we are the only user of | |
2357 | * clp->cl_rpcclient | |
2358 | */ | |
2359 | clnt = xchg(&clp->cl_rpcclient, clnt); | |
2360 | rpc_shutdown_client(clnt); | |
2361 | clnt = clp->cl_rpcclient; | |
05f4c350 CL |
2362 | goto again; |
2363 | ||
2364 | case -NFS4ERR_MINOR_VERS_MISMATCH: | |
2365 | status = -EPROTONOSUPPORT; | |
2366 | break; | |
2367 | ||
2368 | case -EKEYEXPIRED: | |
05f4c350 CL |
2369 | case -NFS4ERR_NOT_SAME: /* FixMe: implement recovery |
2370 | * in nfs4_exchange_id */ | |
2371 | status = -EKEYEXPIRED; | |
ea33e6c3 TM |
2372 | break; |
2373 | default: | |
2374 | pr_warn("NFS: %s unhandled error %d. Exiting with error EIO\n", | |
2375 | __func__, status); | |
2376 | status = -EIO; | |
05f4c350 CL |
2377 | } |
2378 | ||
2379 | out_unlock: | |
2380 | mutex_unlock(&nfs_clid_init_mutex); | |
05f4c350 CL |
2381 | dprintk("NFS: %s: status = %d\n", __func__, status); |
2382 | return status; | |
2383 | } | |
2384 | ||
76db6d95 | 2385 | #ifdef CONFIG_NFS_V4_1 |
9f594791 | 2386 | void nfs4_schedule_session_recovery(struct nfs4_session *session, int err) |
0400a6b0 | 2387 | { |
444f72fe TM |
2388 | struct nfs_client *clp = session->clp; |
2389 | ||
9f594791 TM |
2390 | switch (err) { |
2391 | default: | |
2392 | set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); | |
2393 | break; | |
2394 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
2395 | set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); | |
2396 | } | |
d94cbf6c | 2397 | nfs4_schedule_state_manager(clp); |
0400a6b0 | 2398 | } |
cbdabc7f | 2399 | EXPORT_SYMBOL_GPL(nfs4_schedule_session_recovery); |
0400a6b0 | 2400 | |
3f10a6af | 2401 | void nfs41_notify_server(struct nfs_client *clp) |
ac074835 TM |
2402 | { |
2403 | /* Use CHECK_LEASE to ping the server with a SEQUENCE */ | |
2404 | set_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); | |
2405 | nfs4_schedule_state_manager(clp); | |
2406 | } | |
2407 | ||
0f79fd6f TM |
2408 | static void nfs4_reset_all_state(struct nfs_client *clp) |
2409 | { | |
2410 | if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) == 0) { | |
2c820d9a | 2411 | set_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state); |
be0bfed0 | 2412 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
0f79fd6f | 2413 | nfs4_state_start_reclaim_nograce(clp); |
cc0a9843 TM |
2414 | dprintk("%s: scheduling reset of all state for server %s!\n", |
2415 | __func__, clp->cl_hostname); | |
0400a6b0 | 2416 | nfs4_schedule_state_manager(clp); |
0f79fd6f TM |
2417 | } |
2418 | } | |
2419 | ||
2420 | static void nfs41_handle_server_reboot(struct nfs_client *clp) | |
2421 | { | |
2422 | if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) == 0) { | |
2423 | nfs4_state_start_reclaim_reboot(clp); | |
cc0a9843 TM |
2424 | dprintk("%s: server %s rebooted!\n", __func__, |
2425 | clp->cl_hostname); | |
0400a6b0 | 2426 | nfs4_schedule_state_manager(clp); |
0f79fd6f TM |
2427 | } |
2428 | } | |
2429 | ||
8b895ce6 | 2430 | static void nfs41_handle_all_state_revoked(struct nfs_client *clp) |
0f79fd6f | 2431 | { |
0f79fd6f | 2432 | nfs4_reset_all_state(clp); |
cc0a9843 | 2433 | dprintk("%s: state revoked on server %s\n", __func__, clp->cl_hostname); |
0f79fd6f TM |
2434 | } |
2435 | ||
8b895ce6 TM |
2436 | static void nfs41_handle_some_state_revoked(struct nfs_client *clp) |
2437 | { | |
45870d69 | 2438 | nfs4_state_start_reclaim_nograce(clp); |
8b895ce6 TM |
2439 | nfs4_schedule_state_manager(clp); |
2440 | ||
2441 | dprintk("%s: state revoked on server %s\n", __func__, clp->cl_hostname); | |
2442 | } | |
2443 | ||
0f79fd6f TM |
2444 | static void nfs41_handle_recallable_state_revoked(struct nfs_client *clp) |
2445 | { | |
4099287f TM |
2446 | /* FIXME: For now, we destroy all layouts. */ |
2447 | pnfs_destroy_all_layouts(clp); | |
8ca017c8 | 2448 | nfs_test_expired_all_delegations(clp); |
cc0a9843 TM |
2449 | dprintk("%s: Recallable state revoked on server %s!\n", __func__, |
2450 | clp->cl_hostname); | |
0f79fd6f TM |
2451 | } |
2452 | ||
a9e64442 | 2453 | static void nfs41_handle_backchannel_fault(struct nfs_client *clp) |
0f79fd6f | 2454 | { |
b1352905 TM |
2455 | set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); |
2456 | nfs4_schedule_state_manager(clp); | |
2457 | ||
cc0a9843 TM |
2458 | dprintk("%s: server %s declared a backchannel fault\n", __func__, |
2459 | clp->cl_hostname); | |
0f79fd6f TM |
2460 | } |
2461 | ||
a9e64442 WAA |
2462 | static void nfs41_handle_cb_path_down(struct nfs_client *clp) |
2463 | { | |
2464 | if (test_and_set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, | |
2465 | &clp->cl_state) == 0) | |
2466 | nfs4_schedule_state_manager(clp); | |
2467 | } | |
2468 | ||
0a014a44 TM |
2469 | void nfs41_handle_sequence_flag_errors(struct nfs_client *clp, u32 flags, |
2470 | bool recovery) | |
0629e370 AB |
2471 | { |
2472 | if (!flags) | |
2473 | return; | |
2c820d9a CL |
2474 | |
2475 | dprintk("%s: \"%s\" (client ID %llx) flags=0x%08x\n", | |
2476 | __func__, clp->cl_hostname, clp->cl_clientid, flags); | |
0a014a44 TM |
2477 | /* |
2478 | * If we're called from the state manager thread, then assume we're | |
2479 | * already handling the RECLAIM_NEEDED and/or STATE_REVOKED. | |
2480 | * Those flags are expected to remain set until we're done | |
2481 | * recovering (see RFC5661, section 18.46.3). | |
2482 | */ | |
2483 | if (recovery) | |
2484 | goto out_recovery; | |
2c820d9a | 2485 | |
111d489f | 2486 | if (flags & SEQ4_STATUS_RESTART_RECLAIM_NEEDED) |
0f79fd6f | 2487 | nfs41_handle_server_reboot(clp); |
8b895ce6 TM |
2488 | if (flags & (SEQ4_STATUS_EXPIRED_ALL_STATE_REVOKED)) |
2489 | nfs41_handle_all_state_revoked(clp); | |
2490 | if (flags & (SEQ4_STATUS_EXPIRED_SOME_STATE_REVOKED | | |
d1c2331e | 2491 | SEQ4_STATUS_ADMIN_STATE_REVOKED)) |
8b895ce6 | 2492 | nfs41_handle_some_state_revoked(clp); |
d1c2331e CL |
2493 | if (flags & SEQ4_STATUS_LEASE_MOVED) |
2494 | nfs4_schedule_lease_moved_recovery(clp); | |
111d489f | 2495 | if (flags & SEQ4_STATUS_RECALLABLE_STATE_REVOKED) |
0f79fd6f | 2496 | nfs41_handle_recallable_state_revoked(clp); |
0a014a44 | 2497 | out_recovery: |
a9e64442 WAA |
2498 | if (flags & SEQ4_STATUS_BACKCHANNEL_FAULT) |
2499 | nfs41_handle_backchannel_fault(clp); | |
2500 | else if (flags & (SEQ4_STATUS_CB_PATH_DOWN | | |
2501 | SEQ4_STATUS_CB_PATH_DOWN_SESSION)) | |
0f79fd6f | 2502 | nfs41_handle_cb_path_down(clp); |
0629e370 AB |
2503 | } |
2504 | ||
c3fad1b1 AA |
2505 | static int nfs4_reset_session(struct nfs_client *clp) |
2506 | { | |
a52458b4 | 2507 | const struct cred *cred; |
c3fad1b1 AA |
2508 | int status; |
2509 | ||
1a47e7a6 TM |
2510 | if (!nfs4_has_session(clp)) |
2511 | return 0; | |
8aafd2fd TM |
2512 | status = nfs4_begin_drain_session(clp); |
2513 | if (status != 0) | |
2514 | return status; | |
73d8bde5 | 2515 | cred = nfs4_get_clid_cred(clp); |
848f5bda | 2516 | status = nfs4_proc_destroy_session(clp->cl_session, cred); |
c489ee29 TM |
2517 | switch (status) { |
2518 | case 0: | |
2519 | case -NFS4ERR_BADSESSION: | |
2520 | case -NFS4ERR_DEADSESSION: | |
2521 | break; | |
2522 | case -NFS4ERR_BACK_CHAN_BUSY: | |
2523 | case -NFS4ERR_DELAY: | |
2524 | set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); | |
2525 | status = 0; | |
2526 | ssleep(1); | |
2527 | goto out; | |
2528 | default: | |
f455848a | 2529 | status = nfs4_recovery_handle_error(clp, status); |
c3fad1b1 AA |
2530 | goto out; |
2531 | } | |
2532 | ||
2533 | memset(clp->cl_session->sess_id.data, 0, NFS4_MAX_SESSIONID_LEN); | |
848f5bda | 2534 | status = nfs4_proc_create_session(clp, cred); |
41f54a55 | 2535 | if (status) { |
cc0a9843 TM |
2536 | dprintk("%s: session reset failed with status %d for server %s!\n", |
2537 | __func__, status, clp->cl_hostname); | |
f2c1b510 | 2538 | status = nfs4_handle_reclaim_lease_error(clp, status); |
41f54a55 AA |
2539 | goto out; |
2540 | } | |
bda197f5 | 2541 | nfs41_finish_session_reset(clp); |
cc0a9843 TM |
2542 | dprintk("%s: session reset was successful for server %s!\n", |
2543 | __func__, clp->cl_hostname); | |
41f54a55 | 2544 | out: |
a52458b4 | 2545 | put_cred(cred); |
c3fad1b1 AA |
2546 | return status; |
2547 | } | |
76db6d95 | 2548 | |
a9e64442 WAA |
2549 | static int nfs4_bind_conn_to_session(struct nfs_client *clp) |
2550 | { | |
a52458b4 | 2551 | const struct cred *cred; |
2cf047c9 TM |
2552 | int ret; |
2553 | ||
1a47e7a6 TM |
2554 | if (!nfs4_has_session(clp)) |
2555 | return 0; | |
8aafd2fd TM |
2556 | ret = nfs4_begin_drain_session(clp); |
2557 | if (ret != 0) | |
2558 | return ret; | |
73d8bde5 | 2559 | cred = nfs4_get_clid_cred(clp); |
2cf047c9 | 2560 | ret = nfs4_proc_bind_conn_to_session(clp, cred); |
a52458b4 | 2561 | put_cred(cred); |
43ac544c | 2562 | clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); |
bf674c82 TM |
2563 | switch (ret) { |
2564 | case 0: | |
cc0a9843 TM |
2565 | dprintk("%s: bind_conn_to_session was successful for server %s!\n", |
2566 | __func__, clp->cl_hostname); | |
bf674c82 TM |
2567 | break; |
2568 | case -NFS4ERR_DELAY: | |
2569 | ssleep(1); | |
2570 | set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); | |
2571 | break; | |
2572 | default: | |
2573 | return nfs4_recovery_handle_error(clp, ret); | |
2574 | } | |
2575 | return 0; | |
a9e64442 | 2576 | } |
b5fdf841 TM |
2577 | |
2578 | static void nfs4_layoutreturn_any_run(struct nfs_client *clp) | |
2579 | { | |
2580 | int iomode = 0; | |
2581 | ||
2582 | if (test_and_clear_bit(NFS4CLNT_RECALL_ANY_LAYOUT_READ, &clp->cl_state)) | |
2583 | iomode += IOMODE_READ; | |
2584 | if (test_and_clear_bit(NFS4CLNT_RECALL_ANY_LAYOUT_RW, &clp->cl_state)) | |
2585 | iomode += IOMODE_RW; | |
2586 | /* Note: IOMODE_READ + IOMODE_RW == IOMODE_ANY */ | |
2587 | if (iomode) { | |
2588 | pnfs_layout_return_unused_byclid(clp, iomode); | |
2589 | set_bit(NFS4CLNT_RUN_MANAGER, &clp->cl_state); | |
2590 | } | |
2591 | } | |
76db6d95 | 2592 | #else /* CONFIG_NFS_V4_1 */ |
c3fad1b1 | 2593 | static int nfs4_reset_session(struct nfs_client *clp) { return 0; } |
a9e64442 WAA |
2594 | |
2595 | static int nfs4_bind_conn_to_session(struct nfs_client *clp) | |
2596 | { | |
2597 | return 0; | |
2598 | } | |
b5fdf841 TM |
2599 | |
2600 | static void nfs4_layoutreturn_any_run(struct nfs_client *clp) | |
2601 | { | |
2602 | } | |
76db6d95 AA |
2603 | #endif /* CONFIG_NFS_V4_1 */ |
2604 | ||
e005e804 | 2605 | static void nfs4_state_manager(struct nfs_client *clp) |
02860014 | 2606 | { |
3e17898a | 2607 | unsigned int memflags; |
02860014 | 2608 | int status = 0; |
8ed27d4f | 2609 | const char *section = "", *section_sep = ""; |
02860014 | 2610 | |
3e17898a TM |
2611 | /* |
2612 | * State recovery can deadlock if the direct reclaim code tries | |
2613 | * start NFS writeback. So ensure memory allocations are all | |
2614 | * GFP_NOFS. | |
2615 | */ | |
2616 | memflags = memalloc_nofs_save(); | |
2617 | ||
02860014 | 2618 | /* Ensure exclusive access to NFSv4 state */ |
47c2199b | 2619 | do { |
511ba52e | 2620 | trace_nfs4_state_mgr(clp); |
aeabb3c9 | 2621 | clear_bit(NFS4CLNT_RUN_MANAGER, &clp->cl_state); |
2c820d9a | 2622 | if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) { |
8ed27d4f | 2623 | section = "purge state"; |
b42353ff | 2624 | status = nfs4_purge_lease(clp); |
2a6ee6aa TM |
2625 | if (status < 0) |
2626 | goto out_error; | |
b42353ff | 2627 | continue; |
2c820d9a CL |
2628 | } |
2629 | ||
b42353ff | 2630 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) { |
8ed27d4f | 2631 | section = "lease expired"; |
b79a4a1b TM |
2632 | /* We're going to have to re-establish a clientid */ |
2633 | status = nfs4_reclaim_lease(clp); | |
2a6ee6aa | 2634 | if (status < 0) |
b79a4a1b | 2635 | goto out_error; |
b42353ff | 2636 | continue; |
e598d843 TM |
2637 | } |
2638 | ||
c3fad1b1 | 2639 | /* Initialize or reset the session */ |
1a47e7a6 | 2640 | if (test_and_clear_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state)) { |
8ed27d4f | 2641 | section = "reset session"; |
4d643d1d | 2642 | status = nfs4_reset_session(clp); |
b6d408ba TM |
2643 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
2644 | continue; | |
2645 | if (status < 0) | |
76db6d95 | 2646 | goto out_error; |
76db6d95 | 2647 | } |
b6d408ba | 2648 | |
a9e64442 WAA |
2649 | /* Send BIND_CONN_TO_SESSION */ |
2650 | if (test_and_clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION, | |
1a47e7a6 | 2651 | &clp->cl_state)) { |
8ed27d4f | 2652 | section = "bind conn to session"; |
a9e64442 WAA |
2653 | status = nfs4_bind_conn_to_session(clp); |
2654 | if (status < 0) | |
2655 | goto out_error; | |
bf674c82 | 2656 | continue; |
a9e64442 WAA |
2657 | } |
2658 | ||
5df904ae TM |
2659 | if (test_and_clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state)) { |
2660 | section = "check lease"; | |
2661 | status = nfs4_check_lease(clp); | |
2662 | if (status < 0) | |
2663 | goto out_error; | |
8faaa6d5 | 2664 | continue; |
c9fdeb28 CL |
2665 | } |
2666 | ||
2667 | if (test_and_clear_bit(NFS4CLNT_MOVED, &clp->cl_state)) { | |
2668 | section = "migration"; | |
2669 | status = nfs4_handle_migration(clp); | |
2670 | if (status < 0) | |
2671 | goto out_error; | |
5df904ae TM |
2672 | } |
2673 | ||
b7f7a66e CL |
2674 | if (test_and_clear_bit(NFS4CLNT_LEASE_MOVED, &clp->cl_state)) { |
2675 | section = "lease moved"; | |
2676 | status = nfs4_handle_lease_moved(clp); | |
2677 | if (status < 0) | |
2678 | goto out_error; | |
2679 | } | |
2680 | ||
b79a4a1b | 2681 | /* First recover reboot state... */ |
e345e88a | 2682 | if (test_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) { |
8ed27d4f | 2683 | section = "reclaim reboot"; |
591d71cb | 2684 | status = nfs4_do_reclaim(clp, |
c48f4f35 | 2685 | clp->cl_mvops->reboot_recovery_ops); |
df817ba3 | 2686 | if (status == -EAGAIN) |
b6d408ba TM |
2687 | continue; |
2688 | if (status < 0) | |
2689 | goto out_error; | |
df817ba3 | 2690 | nfs4_state_end_reclaim_reboot(clp); |
5d917cba | 2691 | continue; |
02860014 TM |
2692 | } |
2693 | ||
45870d69 TM |
2694 | /* Detect expired delegations... */ |
2695 | if (test_and_clear_bit(NFS4CLNT_DELEGATION_EXPIRED, &clp->cl_state)) { | |
2696 | section = "detect expired delegations"; | |
2697 | nfs_reap_expired_delegations(clp); | |
2698 | continue; | |
2699 | } | |
2700 | ||
b79a4a1b | 2701 | /* Now recover expired state... */ |
67e7b52d | 2702 | if (test_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) { |
8ed27d4f | 2703 | section = "reclaim nograce"; |
591d71cb | 2704 | status = nfs4_do_reclaim(clp, |
c48f4f35 | 2705 | clp->cl_mvops->nograce_recovery_ops); |
df817ba3 | 2706 | if (status == -EAGAIN) |
b6d408ba TM |
2707 | continue; |
2708 | if (status < 0) | |
b79a4a1b | 2709 | goto out_error; |
67e7b52d | 2710 | clear_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state); |
1da177e4 | 2711 | } |
707fb4b3 | 2712 | |
3e17898a | 2713 | memalloc_nofs_restore(memflags); |
5601a00d | 2714 | nfs4_end_drain_session(clp); |
aeabb3c9 TM |
2715 | nfs4_clear_state_manager_bit(clp); |
2716 | ||
ed1cc05a TM |
2717 | if (test_bit(NFS4CLNT_RUN_MANAGER, &clp->cl_state) && |
2718 | !test_and_set_bit(NFS4CLNT_MANAGER_RUNNING, | |
2719 | &clp->cl_state)) { | |
2720 | memflags = memalloc_nofs_save(); | |
2721 | continue; | |
2722 | } | |
2723 | ||
b5fdf841 | 2724 | if (!test_and_set_bit(NFS4CLNT_RECALL_RUNNING, &clp->cl_state)) { |
aeabb3c9 TM |
2725 | if (test_and_clear_bit(NFS4CLNT_DELEGRETURN, &clp->cl_state)) { |
2726 | nfs_client_return_marked_delegations(clp); | |
2727 | set_bit(NFS4CLNT_RUN_MANAGER, &clp->cl_state); | |
2728 | } | |
b5fdf841 TM |
2729 | nfs4_layoutreturn_any_run(clp); |
2730 | clear_bit(NFS4CLNT_RECALL_RUNNING, &clp->cl_state); | |
707fb4b3 | 2731 | } |
e005e804 | 2732 | |
4dc73c67 N |
2733 | return; |
2734 | ||
a1aa09be | 2735 | } while (refcount_read(&clp->cl_count) > 1 && !signalled()); |
21a446cf TM |
2736 | goto out_drain; |
2737 | ||
1da177e4 | 2738 | out_error: |
8ed27d4f WAA |
2739 | if (strlen(section)) |
2740 | section_sep = ": "; | |
511ba52e | 2741 | trace_nfs4_state_mgr_failed(clp, section, status); |
8ed27d4f WAA |
2742 | pr_warn_ratelimited("NFS: state manager%s%s failed on NFSv4 server %s" |
2743 | " with error %d\n", section_sep, section, | |
2744 | clp->cl_hostname, -status); | |
ffe5a830 | 2745 | ssleep(1); |
21a446cf | 2746 | out_drain: |
3e17898a | 2747 | memalloc_nofs_restore(memflags); |
5601a00d | 2748 | nfs4_end_drain_session(clp); |
e005e804 TM |
2749 | nfs4_clear_state_manager_bit(clp); |
2750 | } | |
2751 | ||
2752 | static int nfs4_run_state_manager(void *ptr) | |
2753 | { | |
2754 | struct nfs_client *clp = ptr; | |
4dc73c67 N |
2755 | struct rpc_clnt *cl = clp->cl_rpcclient; |
2756 | ||
2757 | while (cl != cl->cl_parent) | |
2758 | cl = cl->cl_parent; | |
e005e804 TM |
2759 | |
2760 | allow_signal(SIGKILL); | |
4dc73c67 | 2761 | again: |
e005e804 | 2762 | nfs4_state_manager(clp); |
956fd46f TM |
2763 | |
2764 | if (test_bit(NFS4CLNT_MANAGER_AVAILABLE, &clp->cl_state) && | |
2765 | !test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state)) { | |
4dc73c67 N |
2766 | wait_var_event_interruptible(&clp->cl_state, |
2767 | test_bit(NFS4CLNT_RUN_MANAGER, | |
2768 | &clp->cl_state)); | |
956fd46f TM |
2769 | if (!atomic_read(&cl->cl_swapper)) |
2770 | clear_bit(NFS4CLNT_MANAGER_AVAILABLE, &clp->cl_state); | |
2771 | if (refcount_read(&clp->cl_count) > 1 && !signalled() && | |
2772 | !test_and_set_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state)) | |
4dc73c67 N |
2773 | goto again; |
2774 | /* Either no longer a swapper, or were signalled */ | |
956fd46f | 2775 | clear_bit(NFS4CLNT_MANAGER_AVAILABLE, &clp->cl_state); |
4dc73c67 | 2776 | } |
4dc73c67 N |
2777 | |
2778 | if (refcount_read(&clp->cl_count) > 1 && !signalled() && | |
2779 | test_bit(NFS4CLNT_RUN_MANAGER, &clp->cl_state) && | |
956fd46f | 2780 | !test_and_set_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state)) |
4dc73c67 N |
2781 | goto again; |
2782 | ||
e005e804 | 2783 | nfs_put_client(clp); |
080abad7 | 2784 | module_put_and_kthread_exit(0); |
e005e804 | 2785 | return 0; |
1da177e4 | 2786 | } |