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 LT |
44 | #include <linux/nfs_fs.h> |
45 | #include <linux/nfs_idmap.h> | |
5043e900 TM |
46 | #include <linux/kthread.h> |
47 | #include <linux/module.h> | |
9f958ab8 | 48 | #include <linux/random.h> |
8c7597f6 | 49 | #include <linux/ratelimit.h> |
1da177e4 LT |
50 | #include <linux/workqueue.h> |
51 | #include <linux/bitops.h> | |
0aaaf5c4 | 52 | #include <linux/jiffies.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" |
76e697ba | 60 | #include "nfs4session.h" |
974cec8c | 61 | #include "pnfs.h" |
bbe0a3aa | 62 | #include "netns.h" |
1da177e4 | 63 | |
e3c0fb7e CL |
64 | #define NFSDBG_FACILITY NFSDBG_STATE |
65 | ||
1da177e4 LT |
66 | #define OPENOWNER_POOL_SIZE 8 |
67 | ||
4ce79717 | 68 | const nfs4_stateid zero_stateid; |
05f4c350 | 69 | static DEFINE_MUTEX(nfs_clid_init_mutex); |
1da177e4 | 70 | |
591d71cb | 71 | int nfs4_init_clientid(struct nfs_client *clp, struct rpc_cred *cred) |
1da177e4 | 72 | { |
fd954ae1 TM |
73 | struct nfs4_setclientid_res clid = { |
74 | .clientid = clp->cl_clientid, | |
75 | .confirm = clp->cl_confirm, | |
76 | }; | |
f738f517 CL |
77 | unsigned short port; |
78 | int status; | |
bbe0a3aa | 79 | struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); |
f738f517 | 80 | |
fd954ae1 TM |
81 | if (test_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state)) |
82 | goto do_confirm; | |
bbe0a3aa | 83 | port = nn->nfs_callback_tcpport; |
f738f517 | 84 | if (clp->cl_addr.ss_family == AF_INET6) |
29dcc16a | 85 | port = nn->nfs_callback_tcpport6; |
f738f517 | 86 | |
bb8b27e5 TM |
87 | status = nfs4_proc_setclientid(clp, NFS4_CALLBACK, port, cred, &clid); |
88 | if (status != 0) | |
89 | goto out; | |
fd954ae1 TM |
90 | clp->cl_clientid = clid.clientid; |
91 | clp->cl_confirm = clid.confirm; | |
92 | set_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); | |
93 | do_confirm: | |
bb8b27e5 TM |
94 | status = nfs4_proc_setclientid_confirm(clp, &clid, cred); |
95 | if (status != 0) | |
96 | goto out; | |
fd954ae1 | 97 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
bb8b27e5 TM |
98 | nfs4_schedule_state_renewal(clp); |
99 | out: | |
1da177e4 LT |
100 | return status; |
101 | } | |
102 | ||
05f4c350 CL |
103 | /** |
104 | * nfs40_discover_server_trunking - Detect server IP address trunking (mv0) | |
105 | * | |
106 | * @clp: nfs_client under test | |
107 | * @result: OUT: found nfs_client, or clp | |
108 | * @cred: credential to use for trunking test | |
109 | * | |
110 | * Returns zero, a negative errno, or a negative NFS4ERR status. | |
111 | * If zero is returned, an nfs_client pointer is planted in | |
112 | * "result". | |
113 | * | |
114 | * Note: The returned client may not yet be marked ready. | |
115 | */ | |
116 | int nfs40_discover_server_trunking(struct nfs_client *clp, | |
117 | struct nfs_client **result, | |
118 | struct rpc_cred *cred) | |
119 | { | |
120 | struct nfs4_setclientid_res clid = { | |
121 | .clientid = clp->cl_clientid, | |
122 | .confirm = clp->cl_confirm, | |
123 | }; | |
9f62387d | 124 | struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); |
05f4c350 CL |
125 | unsigned short port; |
126 | int status; | |
127 | ||
9f62387d | 128 | port = nn->nfs_callback_tcpport; |
05f4c350 | 129 | if (clp->cl_addr.ss_family == AF_INET6) |
9f62387d | 130 | port = nn->nfs_callback_tcpport6; |
05f4c350 CL |
131 | |
132 | status = nfs4_proc_setclientid(clp, NFS4_CALLBACK, port, cred, &clid); | |
133 | if (status != 0) | |
134 | goto out; | |
135 | clp->cl_clientid = clid.clientid; | |
136 | clp->cl_confirm = clid.confirm; | |
137 | ||
138 | status = nfs40_walk_client_list(clp, result, cred); | |
202c312d | 139 | if (status == 0) { |
05f4c350 CL |
140 | /* Sustain the lease, even if it's empty. If the clientid4 |
141 | * goes stale it's of no use for trunking discovery. */ | |
142 | nfs4_schedule_state_renewal(*result); | |
05f4c350 | 143 | } |
05f4c350 CL |
144 | out: |
145 | return status; | |
146 | } | |
147 | ||
a7b72103 | 148 | struct rpc_cred *nfs4_get_machine_cred_locked(struct nfs_client *clp) |
a2b2bb88 TM |
149 | { |
150 | struct rpc_cred *cred = NULL; | |
151 | ||
a2b2bb88 TM |
152 | if (clp->cl_machine_cred != NULL) |
153 | cred = get_rpccred(clp->cl_machine_cred); | |
a2b2bb88 TM |
154 | return cred; |
155 | } | |
156 | ||
d688f7b8 CL |
157 | static void nfs4_root_machine_cred(struct nfs_client *clp) |
158 | { | |
159 | struct rpc_cred *cred, *new; | |
160 | ||
161 | new = rpc_lookup_machine_cred(NULL); | |
162 | spin_lock(&clp->cl_lock); | |
163 | cred = clp->cl_machine_cred; | |
164 | clp->cl_machine_cred = new; | |
165 | spin_unlock(&clp->cl_lock); | |
166 | if (cred != NULL) | |
167 | put_rpccred(cred); | |
168 | } | |
169 | ||
24d292b8 CL |
170 | static struct rpc_cred * |
171 | nfs4_get_renew_cred_server_locked(struct nfs_server *server) | |
b4454fe1 | 172 | { |
24d292b8 | 173 | struct rpc_cred *cred = NULL; |
b4454fe1 | 174 | struct nfs4_state_owner *sp; |
9f958ab8 | 175 | struct rb_node *pos; |
b4454fe1 | 176 | |
24d292b8 CL |
177 | for (pos = rb_first(&server->state_owners); |
178 | pos != NULL; | |
179 | pos = rb_next(pos)) { | |
180 | sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); | |
b4454fe1 TM |
181 | if (list_empty(&sp->so_states)) |
182 | continue; | |
183 | cred = get_rpccred(sp->so_cred); | |
184 | break; | |
185 | } | |
186 | return cred; | |
187 | } | |
188 | ||
24d292b8 CL |
189 | /** |
190 | * nfs4_get_renew_cred_locked - Acquire credential for a renew operation | |
191 | * @clp: client state handle | |
192 | * | |
193 | * Returns an rpc_cred with reference count bumped, or NULL. | |
194 | * Caller must hold clp->cl_lock. | |
195 | */ | |
196 | struct rpc_cred *nfs4_get_renew_cred_locked(struct nfs_client *clp) | |
197 | { | |
198 | struct rpc_cred *cred = NULL; | |
199 | struct nfs_server *server; | |
200 | ||
e49a29bd SP |
201 | /* Use machine credentials if available */ |
202 | cred = nfs4_get_machine_cred_locked(clp); | |
203 | if (cred != NULL) | |
204 | goto out; | |
205 | ||
24d292b8 CL |
206 | rcu_read_lock(); |
207 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { | |
208 | cred = nfs4_get_renew_cred_server_locked(server); | |
209 | if (cred != NULL) | |
210 | break; | |
211 | } | |
212 | rcu_read_unlock(); | |
e49a29bd SP |
213 | |
214 | out: | |
24d292b8 CL |
215 | return cred; |
216 | } | |
217 | ||
62f288a0 | 218 | static void nfs4_end_drain_slot_table(struct nfs4_slot_table *tbl) |
9dfdf404 | 219 | { |
774d5f14 | 220 | if (test_and_clear_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state)) { |
961a828d | 221 | spin_lock(&tbl->slot_tbl_lock); |
b75ad4cd | 222 | nfs41_wake_slot_table(tbl); |
961a828d | 223 | spin_unlock(&tbl->slot_tbl_lock); |
689cf5c1 | 224 | } |
9dfdf404 RL |
225 | } |
226 | ||
62f288a0 AA |
227 | static void nfs4_end_drain_session(struct nfs_client *clp) |
228 | { | |
229 | struct nfs4_session *ses = clp->cl_session; | |
230 | ||
2cf8bca8 CL |
231 | if (clp->cl_slot_tbl) { |
232 | nfs4_end_drain_slot_table(clp->cl_slot_tbl); | |
233 | return; | |
234 | } | |
235 | ||
62f288a0 AA |
236 | if (ses != NULL) { |
237 | nfs4_end_drain_slot_table(&ses->bc_slot_table); | |
238 | nfs4_end_drain_slot_table(&ses->fc_slot_table); | |
239 | } | |
240 | } | |
241 | ||
774d5f14 | 242 | static int nfs4_drain_slot_tbl(struct nfs4_slot_table *tbl) |
9dfdf404 | 243 | { |
774d5f14 | 244 | set_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state); |
9dfdf404 | 245 | spin_lock(&tbl->slot_tbl_lock); |
b6bf6e7d | 246 | if (tbl->highest_used_slotid != NFS4_NO_SLOT) { |
16735d02 | 247 | reinit_completion(&tbl->complete); |
9dfdf404 | 248 | spin_unlock(&tbl->slot_tbl_lock); |
42acd021 | 249 | return wait_for_completion_interruptible(&tbl->complete); |
9dfdf404 RL |
250 | } |
251 | spin_unlock(&tbl->slot_tbl_lock); | |
252 | return 0; | |
253 | } | |
254 | ||
42acd021 AA |
255 | static int nfs4_begin_drain_session(struct nfs_client *clp) |
256 | { | |
257 | struct nfs4_session *ses = clp->cl_session; | |
258 | int ret = 0; | |
259 | ||
2cf8bca8 CL |
260 | if (clp->cl_slot_tbl) |
261 | return nfs4_drain_slot_tbl(clp->cl_slot_tbl); | |
262 | ||
42acd021 | 263 | /* back channel */ |
774d5f14 | 264 | ret = nfs4_drain_slot_tbl(&ses->bc_slot_table); |
42acd021 AA |
265 | if (ret) |
266 | return ret; | |
267 | /* fore channel */ | |
774d5f14 | 268 | return nfs4_drain_slot_tbl(&ses->fc_slot_table); |
42acd021 AA |
269 | } |
270 | ||
c9fdeb28 CL |
271 | #if defined(CONFIG_NFS_V4_1) |
272 | ||
2cf8bca8 CL |
273 | static int nfs41_setup_state_renewal(struct nfs_client *clp) |
274 | { | |
275 | int status; | |
276 | struct nfs_fsinfo fsinfo; | |
277 | ||
278 | if (!test_bit(NFS_CS_CHECK_LEASE_TIME, &clp->cl_res_state)) { | |
279 | nfs4_schedule_state_renewal(clp); | |
280 | return 0; | |
281 | } | |
282 | ||
283 | status = nfs4_proc_get_lease_time(clp, &fsinfo); | |
284 | if (status == 0) { | |
285 | /* Update lease time and schedule renewal */ | |
286 | spin_lock(&clp->cl_lock); | |
287 | clp->cl_lease_time = fsinfo.lease_time * HZ; | |
288 | clp->cl_last_renewal = jiffies; | |
289 | spin_unlock(&clp->cl_lock); | |
290 | ||
291 | nfs4_schedule_state_renewal(clp); | |
292 | } | |
293 | ||
294 | return status; | |
295 | } | |
296 | ||
bda197f5 TM |
297 | static void nfs41_finish_session_reset(struct nfs_client *clp) |
298 | { | |
299 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); | |
300 | clear_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); | |
301 | /* create_session negotiated new slot table */ | |
bda197f5 TM |
302 | clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); |
303 | nfs41_setup_state_renewal(clp); | |
304 | } | |
305 | ||
4d643d1d AA |
306 | int nfs41_init_clientid(struct nfs_client *clp, struct rpc_cred *cred) |
307 | { | |
308 | int status; | |
309 | ||
fd954ae1 TM |
310 | if (test_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state)) |
311 | goto do_confirm; | |
38045412 | 312 | nfs4_begin_drain_session(clp); |
4d643d1d | 313 | status = nfs4_proc_exchange_id(clp, cred); |
9430fb6b RL |
314 | if (status != 0) |
315 | goto out; | |
fd954ae1 TM |
316 | set_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
317 | do_confirm: | |
848f5bda | 318 | status = nfs4_proc_create_session(clp, cred); |
9430fb6b RL |
319 | if (status != 0) |
320 | goto out; | |
bda197f5 | 321 | nfs41_finish_session_reset(clp); |
9430fb6b RL |
322 | nfs_mark_client_ready(clp, NFS_CS_READY); |
323 | out: | |
4d643d1d AA |
324 | return status; |
325 | } | |
326 | ||
05f4c350 CL |
327 | /** |
328 | * nfs41_discover_server_trunking - Detect server IP address trunking (mv1) | |
329 | * | |
330 | * @clp: nfs_client under test | |
331 | * @result: OUT: found nfs_client, or clp | |
332 | * @cred: credential to use for trunking test | |
333 | * | |
334 | * Returns NFS4_OK, a negative errno, or a negative NFS4ERR status. | |
335 | * If NFS4_OK is returned, an nfs_client pointer is planted in | |
336 | * "result". | |
337 | * | |
338 | * Note: The returned client may not yet be marked ready. | |
339 | */ | |
340 | int nfs41_discover_server_trunking(struct nfs_client *clp, | |
341 | struct nfs_client **result, | |
342 | struct rpc_cred *cred) | |
343 | { | |
344 | int status; | |
345 | ||
346 | status = nfs4_proc_exchange_id(clp, cred); | |
347 | if (status != NFS4_OK) | |
348 | return status; | |
fd483570 | 349 | set_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
05f4c350 CL |
350 | |
351 | return nfs41_walk_client_list(clp, result, cred); | |
352 | } | |
353 | ||
b4b82607 AA |
354 | #endif /* CONFIG_NFS_V4_1 */ |
355 | ||
24d292b8 | 356 | /** |
73d8bde5 | 357 | * nfs4_get_clid_cred - Acquire credential for a setclientid operation |
24d292b8 CL |
358 | * @clp: client state handle |
359 | * | |
360 | * Returns an rpc_cred with reference count bumped, or NULL. | |
361 | */ | |
73d8bde5 | 362 | struct rpc_cred *nfs4_get_clid_cred(struct nfs_client *clp) |
24d292b8 | 363 | { |
a2b2bb88 | 364 | struct rpc_cred *cred; |
286d7d6a | 365 | |
6dc9d57a TM |
366 | spin_lock(&clp->cl_lock); |
367 | cred = nfs4_get_machine_cred_locked(clp); | |
24d292b8 | 368 | spin_unlock(&clp->cl_lock); |
a2b2bb88 | 369 | return cred; |
286d7d6a TM |
370 | } |
371 | ||
1da177e4 | 372 | static struct nfs4_state_owner * |
24d292b8 | 373 | nfs4_find_state_owner_locked(struct nfs_server *server, struct rpc_cred *cred) |
1da177e4 | 374 | { |
24d292b8 | 375 | struct rb_node **p = &server->state_owners.rb_node, |
9f958ab8 | 376 | *parent = NULL; |
414adf14 | 377 | struct nfs4_state_owner *sp; |
1da177e4 | 378 | |
9f958ab8 TM |
379 | while (*p != NULL) { |
380 | parent = *p; | |
24d292b8 | 381 | sp = rb_entry(parent, struct nfs4_state_owner, so_server_node); |
9f958ab8 TM |
382 | |
383 | if (cred < sp->so_cred) | |
384 | p = &parent->rb_left; | |
385 | else if (cred > sp->so_cred) | |
386 | p = &parent->rb_right; | |
387 | else { | |
0aaaf5c4 CL |
388 | if (!list_empty(&sp->so_lru)) |
389 | list_del_init(&sp->so_lru); | |
9f958ab8 | 390 | atomic_inc(&sp->so_count); |
414adf14 | 391 | return sp; |
9f958ab8 | 392 | } |
1da177e4 | 393 | } |
414adf14 | 394 | return NULL; |
1da177e4 LT |
395 | } |
396 | ||
9f958ab8 | 397 | static struct nfs4_state_owner * |
24d292b8 | 398 | nfs4_insert_state_owner_locked(struct nfs4_state_owner *new) |
9f958ab8 | 399 | { |
24d292b8 CL |
400 | struct nfs_server *server = new->so_server; |
401 | struct rb_node **p = &server->state_owners.rb_node, | |
9f958ab8 TM |
402 | *parent = NULL; |
403 | struct nfs4_state_owner *sp; | |
9157c31d | 404 | int err; |
9f958ab8 TM |
405 | |
406 | while (*p != NULL) { | |
407 | parent = *p; | |
24d292b8 | 408 | sp = rb_entry(parent, struct nfs4_state_owner, so_server_node); |
9f958ab8 TM |
409 | |
410 | if (new->so_cred < sp->so_cred) | |
411 | p = &parent->rb_left; | |
412 | else if (new->so_cred > sp->so_cred) | |
413 | p = &parent->rb_right; | |
414 | else { | |
0aaaf5c4 CL |
415 | if (!list_empty(&sp->so_lru)) |
416 | list_del_init(&sp->so_lru); | |
9f958ab8 TM |
417 | atomic_inc(&sp->so_count); |
418 | return sp; | |
419 | } | |
420 | } | |
48c22eb2 | 421 | err = ida_get_new(&server->openowner_id, &new->so_seqid.owner_id); |
9157c31d TM |
422 | if (err) |
423 | return ERR_PTR(err); | |
24d292b8 CL |
424 | rb_link_node(&new->so_server_node, parent, p); |
425 | rb_insert_color(&new->so_server_node, &server->state_owners); | |
9f958ab8 TM |
426 | return new; |
427 | } | |
428 | ||
429 | static void | |
24d292b8 | 430 | nfs4_remove_state_owner_locked(struct nfs4_state_owner *sp) |
9f958ab8 | 431 | { |
24d292b8 CL |
432 | struct nfs_server *server = sp->so_server; |
433 | ||
434 | if (!RB_EMPTY_NODE(&sp->so_server_node)) | |
435 | rb_erase(&sp->so_server_node, &server->state_owners); | |
48c22eb2 | 436 | ida_remove(&server->openowner_id, sp->so_seqid.owner_id); |
9f958ab8 TM |
437 | } |
438 | ||
7ba127ab TM |
439 | static void |
440 | nfs4_init_seqid_counter(struct nfs_seqid_counter *sc) | |
441 | { | |
95b72eb0 | 442 | sc->create_time = ktime_get(); |
7ba127ab TM |
443 | sc->flags = 0; |
444 | sc->counter = 0; | |
445 | spin_lock_init(&sc->lock); | |
446 | INIT_LIST_HEAD(&sc->list); | |
447 | rpc_init_wait_queue(&sc->wait, "Seqid_waitqueue"); | |
448 | } | |
449 | ||
450 | static void | |
451 | nfs4_destroy_seqid_counter(struct nfs_seqid_counter *sc) | |
452 | { | |
453 | rpc_destroy_wait_queue(&sc->wait); | |
454 | } | |
455 | ||
1da177e4 LT |
456 | /* |
457 | * nfs4_alloc_state_owner(): this is called on the OPEN or CREATE path to | |
458 | * create a new state_owner. | |
459 | * | |
460 | */ | |
461 | static struct nfs4_state_owner * | |
d1e284d5 TM |
462 | nfs4_alloc_state_owner(struct nfs_server *server, |
463 | struct rpc_cred *cred, | |
464 | gfp_t gfp_flags) | |
1da177e4 LT |
465 | { |
466 | struct nfs4_state_owner *sp; | |
467 | ||
d1e284d5 | 468 | sp = kzalloc(sizeof(*sp), gfp_flags); |
1da177e4 LT |
469 | if (!sp) |
470 | return NULL; | |
d1e284d5 TM |
471 | sp->so_server = server; |
472 | sp->so_cred = get_rpccred(cred); | |
ec073428 | 473 | spin_lock_init(&sp->so_lock); |
1da177e4 | 474 | INIT_LIST_HEAD(&sp->so_states); |
7ba127ab | 475 | nfs4_init_seqid_counter(&sp->so_seqid); |
1da177e4 | 476 | atomic_set(&sp->so_count, 1); |
0aaaf5c4 | 477 | INIT_LIST_HEAD(&sp->so_lru); |
c137afab | 478 | seqcount_init(&sp->so_reclaim_seqcount); |
65b62a29 | 479 | mutex_init(&sp->so_delegreturn_mutex); |
1da177e4 LT |
480 | return sp; |
481 | } | |
482 | ||
1d2e88e7 | 483 | static void |
1da177e4 LT |
484 | nfs4_drop_state_owner(struct nfs4_state_owner *sp) |
485 | { | |
c77365c9 TM |
486 | struct rb_node *rb_node = &sp->so_server_node; |
487 | ||
488 | if (!RB_EMPTY_NODE(rb_node)) { | |
24d292b8 CL |
489 | struct nfs_server *server = sp->so_server; |
490 | struct nfs_client *clp = server->nfs_client; | |
9f958ab8 TM |
491 | |
492 | spin_lock(&clp->cl_lock); | |
c77365c9 TM |
493 | if (!RB_EMPTY_NODE(rb_node)) { |
494 | rb_erase(rb_node, &server->state_owners); | |
495 | RB_CLEAR_NODE(rb_node); | |
496 | } | |
9f958ab8 TM |
497 | spin_unlock(&clp->cl_lock); |
498 | } | |
1da177e4 LT |
499 | } |
500 | ||
0aaaf5c4 CL |
501 | static void nfs4_free_state_owner(struct nfs4_state_owner *sp) |
502 | { | |
7ba127ab | 503 | nfs4_destroy_seqid_counter(&sp->so_seqid); |
0aaaf5c4 CL |
504 | put_rpccred(sp->so_cred); |
505 | kfree(sp); | |
506 | } | |
507 | ||
508 | static void nfs4_gc_state_owners(struct nfs_server *server) | |
509 | { | |
510 | struct nfs_client *clp = server->nfs_client; | |
511 | struct nfs4_state_owner *sp, *tmp; | |
512 | unsigned long time_min, time_max; | |
513 | LIST_HEAD(doomed); | |
514 | ||
515 | spin_lock(&clp->cl_lock); | |
516 | time_max = jiffies; | |
517 | time_min = (long)time_max - (long)clp->cl_lease_time; | |
518 | list_for_each_entry_safe(sp, tmp, &server->state_owners_lru, so_lru) { | |
519 | /* NB: LRU is sorted so that oldest is at the head */ | |
520 | if (time_in_range(sp->so_expires, time_min, time_max)) | |
521 | break; | |
522 | list_move(&sp->so_lru, &doomed); | |
523 | nfs4_remove_state_owner_locked(sp); | |
524 | } | |
525 | spin_unlock(&clp->cl_lock); | |
526 | ||
527 | list_for_each_entry_safe(sp, tmp, &doomed, so_lru) { | |
528 | list_del(&sp->so_lru); | |
529 | nfs4_free_state_owner(sp); | |
530 | } | |
531 | } | |
532 | ||
24d292b8 CL |
533 | /** |
534 | * nfs4_get_state_owner - Look up a state owner given a credential | |
535 | * @server: nfs_server to search | |
536 | * @cred: RPC credential to match | |
537 | * | |
538 | * Returns a pointer to an instantiated nfs4_state_owner struct, or NULL. | |
539 | */ | |
540 | struct nfs4_state_owner *nfs4_get_state_owner(struct nfs_server *server, | |
d1e284d5 TM |
541 | struct rpc_cred *cred, |
542 | gfp_t gfp_flags) | |
1da177e4 | 543 | { |
7539bbab | 544 | struct nfs_client *clp = server->nfs_client; |
1da177e4 LT |
545 | struct nfs4_state_owner *sp, *new; |
546 | ||
1da177e4 | 547 | spin_lock(&clp->cl_lock); |
24d292b8 | 548 | sp = nfs4_find_state_owner_locked(server, cred); |
1da177e4 | 549 | spin_unlock(&clp->cl_lock); |
1da177e4 | 550 | if (sp != NULL) |
0aaaf5c4 | 551 | goto out; |
d1e284d5 | 552 | new = nfs4_alloc_state_owner(server, cred, gfp_flags); |
9f958ab8 | 553 | if (new == NULL) |
0aaaf5c4 | 554 | goto out; |
9157c31d TM |
555 | do { |
556 | if (ida_pre_get(&server->openowner_id, gfp_flags) == 0) | |
557 | break; | |
558 | spin_lock(&clp->cl_lock); | |
559 | sp = nfs4_insert_state_owner_locked(new); | |
560 | spin_unlock(&clp->cl_lock); | |
561 | } while (sp == ERR_PTR(-EAGAIN)); | |
d1e284d5 TM |
562 | if (sp != new) |
563 | nfs4_free_state_owner(new); | |
0aaaf5c4 CL |
564 | out: |
565 | nfs4_gc_state_owners(server); | |
9f958ab8 | 566 | return sp; |
1da177e4 LT |
567 | } |
568 | ||
24d292b8 CL |
569 | /** |
570 | * nfs4_put_state_owner - Release a nfs4_state_owner | |
571 | * @sp: state owner data to release | |
7bf97bc2 TM |
572 | * |
573 | * Note that we keep released state owners on an LRU | |
574 | * list. | |
575 | * This caches valid state owners so that they can be | |
576 | * reused, to avoid the OPEN_CONFIRM on minor version 0. | |
577 | * It also pins the uniquifier of dropped state owners for | |
578 | * a while, to ensure that those state owner names are | |
579 | * never reused. | |
24d292b8 | 580 | */ |
1da177e4 LT |
581 | void nfs4_put_state_owner(struct nfs4_state_owner *sp) |
582 | { | |
0aaaf5c4 CL |
583 | struct nfs_server *server = sp->so_server; |
584 | struct nfs_client *clp = server->nfs_client; | |
1da177e4 LT |
585 | |
586 | if (!atomic_dec_and_lock(&sp->so_count, &clp->cl_lock)) | |
587 | return; | |
0aaaf5c4 | 588 | |
7bf97bc2 TM |
589 | sp->so_expires = jiffies; |
590 | list_add_tail(&sp->so_lru, &server->state_owners_lru); | |
591 | spin_unlock(&clp->cl_lock); | |
0aaaf5c4 CL |
592 | } |
593 | ||
594 | /** | |
595 | * nfs4_purge_state_owners - Release all cached state owners | |
596 | * @server: nfs_server with cached state owners to release | |
597 | * | |
598 | * Called at umount time. Remaining state owners will be on | |
599 | * the LRU with ref count of zero. | |
600 | */ | |
601 | void nfs4_purge_state_owners(struct nfs_server *server) | |
602 | { | |
603 | struct nfs_client *clp = server->nfs_client; | |
604 | struct nfs4_state_owner *sp, *tmp; | |
605 | LIST_HEAD(doomed); | |
606 | ||
607 | spin_lock(&clp->cl_lock); | |
608 | list_for_each_entry_safe(sp, tmp, &server->state_owners_lru, so_lru) { | |
609 | list_move(&sp->so_lru, &doomed); | |
610 | nfs4_remove_state_owner_locked(sp); | |
611 | } | |
1da177e4 | 612 | spin_unlock(&clp->cl_lock); |
0aaaf5c4 CL |
613 | |
614 | list_for_each_entry_safe(sp, tmp, &doomed, so_lru) { | |
615 | list_del(&sp->so_lru); | |
616 | nfs4_free_state_owner(sp); | |
617 | } | |
1da177e4 LT |
618 | } |
619 | ||
620 | static struct nfs4_state * | |
621 | nfs4_alloc_open_state(void) | |
622 | { | |
623 | struct nfs4_state *state; | |
624 | ||
8535b2be | 625 | state = kzalloc(sizeof(*state), GFP_NOFS); |
1da177e4 LT |
626 | if (!state) |
627 | return NULL; | |
1da177e4 LT |
628 | atomic_set(&state->count, 1); |
629 | INIT_LIST_HEAD(&state->lock_states); | |
8d0a8a9d | 630 | spin_lock_init(&state->state_lock); |
8bda4e4c | 631 | seqlock_init(&state->seqlock); |
1da177e4 LT |
632 | return state; |
633 | } | |
634 | ||
4cecb76f | 635 | void |
dc0b027d | 636 | nfs4_state_set_mode_locked(struct nfs4_state *state, fmode_t fmode) |
4cecb76f | 637 | { |
dc0b027d | 638 | if (state->state == fmode) |
4cecb76f TM |
639 | return; |
640 | /* NB! List reordering - see the reclaim code for why. */ | |
dc0b027d TM |
641 | if ((fmode & FMODE_WRITE) != (state->state & FMODE_WRITE)) { |
642 | if (fmode & FMODE_WRITE) | |
4cecb76f TM |
643 | list_move(&state->open_states, &state->owner->so_states); |
644 | else | |
645 | list_move_tail(&state->open_states, &state->owner->so_states); | |
646 | } | |
dc0b027d | 647 | state->state = fmode; |
4cecb76f TM |
648 | } |
649 | ||
1da177e4 LT |
650 | static struct nfs4_state * |
651 | __nfs4_find_state_byowner(struct inode *inode, struct nfs4_state_owner *owner) | |
652 | { | |
653 | struct nfs_inode *nfsi = NFS_I(inode); | |
654 | struct nfs4_state *state; | |
655 | ||
656 | list_for_each_entry(state, &nfsi->open_states, inode_states) { | |
1c816efa | 657 | if (state->owner != owner) |
1da177e4 | 658 | continue; |
5d422301 TM |
659 | if (!nfs4_valid_open_stateid(state)) |
660 | continue; | |
1c816efa | 661 | if (atomic_inc_not_zero(&state->count)) |
1da177e4 | 662 | return state; |
1da177e4 LT |
663 | } |
664 | return NULL; | |
665 | } | |
666 | ||
1da177e4 LT |
667 | static void |
668 | nfs4_free_open_state(struct nfs4_state *state) | |
669 | { | |
670 | kfree(state); | |
671 | } | |
672 | ||
673 | struct nfs4_state * | |
674 | nfs4_get_open_state(struct inode *inode, struct nfs4_state_owner *owner) | |
675 | { | |
676 | struct nfs4_state *state, *new; | |
677 | struct nfs_inode *nfsi = NFS_I(inode); | |
678 | ||
679 | spin_lock(&inode->i_lock); | |
680 | state = __nfs4_find_state_byowner(inode, owner); | |
681 | spin_unlock(&inode->i_lock); | |
682 | if (state) | |
683 | goto out; | |
684 | new = nfs4_alloc_open_state(); | |
ec073428 | 685 | spin_lock(&owner->so_lock); |
1da177e4 LT |
686 | spin_lock(&inode->i_lock); |
687 | state = __nfs4_find_state_byowner(inode, owner); | |
688 | if (state == NULL && new != NULL) { | |
689 | state = new; | |
1da177e4 LT |
690 | state->owner = owner; |
691 | atomic_inc(&owner->so_count); | |
692 | list_add(&state->inode_states, &nfsi->open_states); | |
0444d76a DC |
693 | ihold(inode); |
694 | state->inode = inode; | |
1da177e4 | 695 | spin_unlock(&inode->i_lock); |
ec073428 TM |
696 | /* Note: The reclaim code dictates that we add stateless |
697 | * and read-only stateids to the end of the list */ | |
698 | list_add_tail(&state->open_states, &owner->so_states); | |
699 | spin_unlock(&owner->so_lock); | |
1da177e4 LT |
700 | } else { |
701 | spin_unlock(&inode->i_lock); | |
ec073428 | 702 | spin_unlock(&owner->so_lock); |
1da177e4 LT |
703 | if (new) |
704 | nfs4_free_open_state(new); | |
705 | } | |
706 | out: | |
707 | return state; | |
708 | } | |
709 | ||
1da177e4 LT |
710 | void nfs4_put_open_state(struct nfs4_state *state) |
711 | { | |
712 | struct inode *inode = state->inode; | |
713 | struct nfs4_state_owner *owner = state->owner; | |
714 | ||
ec073428 | 715 | if (!atomic_dec_and_lock(&state->count, &owner->so_lock)) |
1da177e4 | 716 | return; |
ec073428 | 717 | spin_lock(&inode->i_lock); |
ba683031 | 718 | list_del(&state->inode_states); |
1da177e4 | 719 | list_del(&state->open_states); |
ec073428 TM |
720 | spin_unlock(&inode->i_lock); |
721 | spin_unlock(&owner->so_lock); | |
1da177e4 | 722 | iput(inode); |
1da177e4 LT |
723 | nfs4_free_open_state(state); |
724 | nfs4_put_state_owner(owner); | |
725 | } | |
726 | ||
727 | /* | |
83c9d41e | 728 | * Close the current file. |
1da177e4 | 729 | */ |
643168c2 | 730 | static void __nfs4_close(struct nfs4_state *state, |
8535b2be | 731 | fmode_t fmode, gfp_t gfp_mask, int wait) |
1da177e4 | 732 | { |
1da177e4 | 733 | struct nfs4_state_owner *owner = state->owner; |
003707c7 | 734 | int call_close = 0; |
dc0b027d | 735 | fmode_t newstate; |
1da177e4 LT |
736 | |
737 | atomic_inc(&owner->so_count); | |
1da177e4 | 738 | /* Protect against nfs4_find_state() */ |
ec073428 | 739 | spin_lock(&owner->so_lock); |
dc0b027d | 740 | switch (fmode & (FMODE_READ | FMODE_WRITE)) { |
e7616923 TM |
741 | case FMODE_READ: |
742 | state->n_rdonly--; | |
743 | break; | |
744 | case FMODE_WRITE: | |
745 | state->n_wronly--; | |
746 | break; | |
747 | case FMODE_READ|FMODE_WRITE: | |
748 | state->n_rdwr--; | |
749 | } | |
003707c7 | 750 | newstate = FMODE_READ|FMODE_WRITE; |
e7616923 | 751 | if (state->n_rdwr == 0) { |
003707c7 | 752 | if (state->n_rdonly == 0) { |
e7616923 | 753 | newstate &= ~FMODE_READ; |
003707c7 TM |
754 | call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags); |
755 | call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); | |
756 | } | |
757 | if (state->n_wronly == 0) { | |
e7616923 | 758 | newstate &= ~FMODE_WRITE; |
003707c7 TM |
759 | call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags); |
760 | call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); | |
761 | } | |
762 | if (newstate == 0) | |
763 | clear_bit(NFS_DELEGATED_STATE, &state->flags); | |
e7616923 | 764 | } |
003707c7 | 765 | nfs4_state_set_mode_locked(state, newstate); |
ec073428 | 766 | spin_unlock(&owner->so_lock); |
4cecb76f | 767 | |
003707c7 | 768 | if (!call_close) { |
b39e625b TM |
769 | nfs4_put_open_state(state); |
770 | nfs4_put_state_owner(owner); | |
1f7977c1 TM |
771 | } else |
772 | nfs4_do_close(state, gfp_mask, wait); | |
a49c3c77 TM |
773 | } |
774 | ||
643168c2 | 775 | void nfs4_close_state(struct nfs4_state *state, fmode_t fmode) |
a49c3c77 | 776 | { |
643168c2 | 777 | __nfs4_close(state, fmode, GFP_NOFS, 0); |
a49c3c77 TM |
778 | } |
779 | ||
643168c2 | 780 | void nfs4_close_sync(struct nfs4_state *state, fmode_t fmode) |
a49c3c77 | 781 | { |
643168c2 | 782 | __nfs4_close(state, fmode, GFP_KERNEL, 1); |
1da177e4 LT |
783 | } |
784 | ||
785 | /* | |
786 | * Search the state->lock_states for an existing lock_owner | |
787 | * that is compatible with current->files | |
788 | */ | |
789 | static struct nfs4_lock_state * | |
8003d3c4 | 790 | __nfs4_find_lock_state(struct nfs4_state *state, fl_owner_t fl_owner) |
1da177e4 LT |
791 | { |
792 | struct nfs4_lock_state *pos; | |
793 | list_for_each_entry(pos, &state->lock_states, ls_locks) { | |
8003d3c4 | 794 | if (pos->ls_owner != fl_owner) |
1da177e4 LT |
795 | continue; |
796 | atomic_inc(&pos->ls_count); | |
797 | return pos; | |
798 | } | |
799 | return NULL; | |
800 | } | |
801 | ||
1da177e4 LT |
802 | /* |
803 | * Return a compatible lock_state. If no initialized lock_state structure | |
804 | * exists, return an uninitialized one. | |
805 | * | |
1da177e4 | 806 | */ |
8003d3c4 | 807 | static struct nfs4_lock_state *nfs4_alloc_lock_state(struct nfs4_state *state, fl_owner_t fl_owner) |
1da177e4 LT |
808 | { |
809 | struct nfs4_lock_state *lsp; | |
24d292b8 | 810 | struct nfs_server *server = state->owner->so_server; |
1da177e4 | 811 | |
8535b2be | 812 | lsp = kzalloc(sizeof(*lsp), GFP_NOFS); |
1da177e4 LT |
813 | if (lsp == NULL) |
814 | return NULL; | |
7ba127ab | 815 | nfs4_init_seqid_counter(&lsp->ls_seqid); |
1da177e4 | 816 | atomic_set(&lsp->ls_count, 1); |
b64aec8d | 817 | lsp->ls_state = state; |
8003d3c4 | 818 | lsp->ls_owner = fl_owner; |
48c22eb2 TM |
819 | lsp->ls_seqid.owner_id = ida_simple_get(&server->lockowner_id, 0, 0, GFP_NOFS); |
820 | if (lsp->ls_seqid.owner_id < 0) | |
d2d7ce28 | 821 | goto out_free; |
8d0a8a9d | 822 | INIT_LIST_HEAD(&lsp->ls_locks); |
1da177e4 | 823 | return lsp; |
d2d7ce28 TM |
824 | out_free: |
825 | kfree(lsp); | |
826 | return NULL; | |
1da177e4 LT |
827 | } |
828 | ||
5ae67c4f | 829 | void nfs4_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp) |
9f958ab8 | 830 | { |
48c22eb2 | 831 | ida_simple_remove(&server->lockowner_id, lsp->ls_seqid.owner_id); |
7ba127ab | 832 | nfs4_destroy_seqid_counter(&lsp->ls_seqid); |
9f958ab8 TM |
833 | kfree(lsp); |
834 | } | |
835 | ||
1da177e4 LT |
836 | /* |
837 | * Return a compatible lock_state. If no initialized lock_state structure | |
838 | * exists, return an uninitialized one. | |
839 | * | |
1da177e4 | 840 | */ |
8003d3c4 | 841 | static struct nfs4_lock_state *nfs4_get_lock_state(struct nfs4_state *state, fl_owner_t owner) |
1da177e4 | 842 | { |
8d0a8a9d | 843 | struct nfs4_lock_state *lsp, *new = NULL; |
1da177e4 | 844 | |
8d0a8a9d TM |
845 | for(;;) { |
846 | spin_lock(&state->state_lock); | |
8003d3c4 | 847 | lsp = __nfs4_find_lock_state(state, owner); |
8d0a8a9d TM |
848 | if (lsp != NULL) |
849 | break; | |
850 | if (new != NULL) { | |
8d0a8a9d TM |
851 | list_add(&new->ls_locks, &state->lock_states); |
852 | set_bit(LK_STATE_IN_USE, &state->flags); | |
853 | lsp = new; | |
854 | new = NULL; | |
855 | break; | |
856 | } | |
857 | spin_unlock(&state->state_lock); | |
8003d3c4 | 858 | new = nfs4_alloc_lock_state(state, owner); |
8d0a8a9d TM |
859 | if (new == NULL) |
860 | return NULL; | |
861 | } | |
862 | spin_unlock(&state->state_lock); | |
9f958ab8 | 863 | if (new != NULL) |
5ae67c4f | 864 | nfs4_free_lock_state(state->owner->so_server, new); |
1da177e4 LT |
865 | return lsp; |
866 | } | |
867 | ||
868 | /* | |
8d0a8a9d TM |
869 | * Release reference to lock_state, and free it if we see that |
870 | * it is no longer in use | |
1da177e4 | 871 | */ |
faf5f49c | 872 | void nfs4_put_lock_state(struct nfs4_lock_state *lsp) |
1da177e4 | 873 | { |
c8b2d0bf | 874 | struct nfs_server *server; |
8d0a8a9d | 875 | struct nfs4_state *state; |
1da177e4 | 876 | |
8d0a8a9d TM |
877 | if (lsp == NULL) |
878 | return; | |
879 | state = lsp->ls_state; | |
880 | if (!atomic_dec_and_lock(&lsp->ls_count, &state->state_lock)) | |
881 | return; | |
882 | list_del(&lsp->ls_locks); | |
883 | if (list_empty(&state->lock_states)) | |
884 | clear_bit(LK_STATE_IN_USE, &state->flags); | |
885 | spin_unlock(&state->state_lock); | |
0c0e0d3c JL |
886 | server = state->owner->so_server; |
887 | if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) { | |
888 | struct nfs_client *clp = server->nfs_client; | |
889 | ||
890 | clp->cl_mvops->free_lock_state(server, lsp); | |
891 | } else | |
c8b2d0bf | 892 | nfs4_free_lock_state(server, lsp); |
1da177e4 LT |
893 | } |
894 | ||
8d0a8a9d | 895 | static void nfs4_fl_copy_lock(struct file_lock *dst, struct file_lock *src) |
1da177e4 | 896 | { |
8d0a8a9d | 897 | struct nfs4_lock_state *lsp = src->fl_u.nfs4_fl.owner; |
1da177e4 | 898 | |
8d0a8a9d TM |
899 | dst->fl_u.nfs4_fl.owner = lsp; |
900 | atomic_inc(&lsp->ls_count); | |
901 | } | |
1da177e4 | 902 | |
8d0a8a9d | 903 | static void nfs4_fl_release_lock(struct file_lock *fl) |
1da177e4 | 904 | { |
8d0a8a9d | 905 | nfs4_put_lock_state(fl->fl_u.nfs4_fl.owner); |
1da177e4 LT |
906 | } |
907 | ||
6aed6285 | 908 | static const struct file_lock_operations nfs4_fl_lock_ops = { |
8d0a8a9d TM |
909 | .fl_copy_lock = nfs4_fl_copy_lock, |
910 | .fl_release_private = nfs4_fl_release_lock, | |
911 | }; | |
912 | ||
913 | int nfs4_set_lock_state(struct nfs4_state *state, struct file_lock *fl) | |
1da177e4 | 914 | { |
8d0a8a9d TM |
915 | struct nfs4_lock_state *lsp; |
916 | ||
917 | if (fl->fl_ops != NULL) | |
918 | return 0; | |
8003d3c4 | 919 | lsp = nfs4_get_lock_state(state, fl->fl_owner); |
8d0a8a9d TM |
920 | if (lsp == NULL) |
921 | return -ENOMEM; | |
922 | fl->fl_u.nfs4_fl.owner = lsp; | |
923 | fl->fl_ops = &nfs4_fl_lock_ops; | |
924 | return 0; | |
1da177e4 LT |
925 | } |
926 | ||
5521abfd TM |
927 | static int nfs4_copy_lock_stateid(nfs4_stateid *dst, |
928 | struct nfs4_state *state, | |
2a369153 | 929 | const struct nfs_lockowner *lockowner) |
1da177e4 | 930 | { |
8d0a8a9d | 931 | struct nfs4_lock_state *lsp; |
2a369153 | 932 | fl_owner_t fl_owner; |
5521abfd | 933 | int ret = -ENOENT; |
1da177e4 | 934 | |
2a369153 TM |
935 | |
936 | if (lockowner == NULL) | |
937 | goto out; | |
938 | ||
8d0a8a9d | 939 | if (test_bit(LK_STATE_IN_USE, &state->flags) == 0) |
4fc8796d | 940 | goto out; |
1da177e4 | 941 | |
2a369153 | 942 | fl_owner = lockowner->l_owner; |
8d0a8a9d | 943 | spin_lock(&state->state_lock); |
8003d3c4 | 944 | lsp = __nfs4_find_lock_state(state, fl_owner); |
ef1820f9 N |
945 | if (lsp && test_bit(NFS_LOCK_LOST, &lsp->ls_flags)) |
946 | ret = -EIO; | |
947 | else if (lsp != NULL && test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0) { | |
f597c537 | 948 | nfs4_stateid_copy(dst, &lsp->ls_stateid); |
5521abfd | 949 | ret = 0; |
4fc8796d | 950 | } |
8d0a8a9d | 951 | spin_unlock(&state->state_lock); |
1da177e4 | 952 | nfs4_put_lock_state(lsp); |
4fc8796d TM |
953 | out: |
954 | return ret; | |
955 | } | |
956 | ||
927864cd | 957 | static void nfs4_copy_open_stateid(nfs4_stateid *dst, struct nfs4_state *state) |
4fc8796d | 958 | { |
92b40e93 | 959 | const nfs4_stateid *src; |
4fc8796d TM |
960 | int seq; |
961 | ||
962 | do { | |
92b40e93 | 963 | src = &zero_stateid; |
4fc8796d | 964 | seq = read_seqbegin(&state->seqlock); |
92b40e93 TM |
965 | if (test_bit(NFS_OPEN_STATE, &state->flags)) |
966 | src = &state->open_stateid; | |
967 | nfs4_stateid_copy(dst, src); | |
4fc8796d TM |
968 | } while (read_seqretry(&state->seqlock, seq)); |
969 | } | |
970 | ||
971 | /* | |
972 | * Byte-range lock aware utility to initialize the stateid of read/write | |
973 | * requests. | |
974 | */ | |
5521abfd | 975 | int nfs4_select_rw_stateid(nfs4_stateid *dst, struct nfs4_state *state, |
2a369153 | 976 | fmode_t fmode, const struct nfs_lockowner *lockowner) |
4fc8796d | 977 | { |
ef1820f9 N |
978 | int ret = nfs4_copy_lock_stateid(dst, state, lockowner); |
979 | if (ret == -EIO) | |
980 | /* A lost lock - don't even consider delegations */ | |
981 | goto out; | |
146d70ca AA |
982 | /* returns true if delegation stateid found and copied */ |
983 | if (nfs4_copy_delegation_stateid(dst, state->inode, fmode)) { | |
984 | ret = 0; | |
5521abfd | 985 | goto out; |
146d70ca | 986 | } |
5521abfd | 987 | if (ret != -ENOENT) |
ef1820f9 N |
988 | /* nfs4_copy_delegation_stateid() didn't over-write |
989 | * dst, so it still has the lock stateid which we now | |
990 | * choose to use. | |
991 | */ | |
5521abfd | 992 | goto out; |
927864cd TM |
993 | nfs4_copy_open_stateid(dst, state); |
994 | ret = 0; | |
5521abfd | 995 | out: |
3b66486c TM |
996 | if (nfs_server_capable(state->inode, NFS_CAP_STATEID_NFSV41)) |
997 | dst->seqid = 0; | |
5521abfd | 998 | return ret; |
1da177e4 LT |
999 | } |
1000 | ||
8535b2be | 1001 | struct nfs_seqid *nfs_alloc_seqid(struct nfs_seqid_counter *counter, gfp_t gfp_mask) |
cee54fc9 | 1002 | { |
cee54fc9 TM |
1003 | struct nfs_seqid *new; |
1004 | ||
8535b2be | 1005 | new = kmalloc(sizeof(*new), gfp_mask); |
badc76dd TM |
1006 | if (new == NULL) |
1007 | return ERR_PTR(-ENOMEM); | |
1008 | new->sequence = counter; | |
1009 | INIT_LIST_HEAD(&new->list); | |
1010 | new->task = NULL; | |
cee54fc9 TM |
1011 | return new; |
1012 | } | |
1013 | ||
72211dbe | 1014 | void nfs_release_seqid(struct nfs_seqid *seqid) |
1da177e4 | 1015 | { |
4601df20 | 1016 | struct nfs_seqid_counter *sequence; |
cee54fc9 | 1017 | |
a6796419 | 1018 | if (seqid == NULL || list_empty(&seqid->list)) |
4601df20 TM |
1019 | return; |
1020 | sequence = seqid->sequence; | |
1021 | spin_lock(&sequence->lock); | |
1022 | list_del_init(&seqid->list); | |
1023 | if (!list_empty(&sequence->list)) { | |
1024 | struct nfs_seqid *next; | |
1025 | ||
1026 | next = list_first_entry(&sequence->list, | |
1027 | struct nfs_seqid, list); | |
1028 | rpc_wake_up_queued_task(&sequence->wait, next->task); | |
2f74c0a0 | 1029 | } |
4601df20 | 1030 | spin_unlock(&sequence->lock); |
72211dbe TM |
1031 | } |
1032 | ||
1033 | void nfs_free_seqid(struct nfs_seqid *seqid) | |
1034 | { | |
1035 | nfs_release_seqid(seqid); | |
cee54fc9 | 1036 | kfree(seqid); |
1da177e4 LT |
1037 | } |
1038 | ||
1039 | /* | |
cee54fc9 TM |
1040 | * Increment the seqid if the OPEN/OPEN_DOWNGRADE/CLOSE succeeded, or |
1041 | * failed with a seqid incrementing error - | |
16a6ddc7 | 1042 | * see comments nfs4.h:seqid_mutating_error() |
cee54fc9 | 1043 | */ |
88d90939 | 1044 | static void nfs_increment_seqid(int status, struct nfs_seqid *seqid) |
cee54fc9 TM |
1045 | { |
1046 | switch (status) { | |
1047 | case 0: | |
1048 | break; | |
1049 | case -NFS4ERR_BAD_SEQID: | |
6f43ddcc TM |
1050 | if (seqid->sequence->flags & NFS_SEQID_CONFIRMED) |
1051 | return; | |
9a3ba432 | 1052 | pr_warn_ratelimited("NFS: v4 server returned a bad" |
497799e7 DM |
1053 | " sequence-id error on an" |
1054 | " unconfirmed sequence %p!\n", | |
6f43ddcc | 1055 | seqid->sequence); |
cee54fc9 TM |
1056 | case -NFS4ERR_STALE_CLIENTID: |
1057 | case -NFS4ERR_STALE_STATEID: | |
1058 | case -NFS4ERR_BAD_STATEID: | |
1059 | case -NFS4ERR_BADXDR: | |
1060 | case -NFS4ERR_RESOURCE: | |
1061 | case -NFS4ERR_NOFILEHANDLE: | |
1062 | /* Non-seqid mutating errors */ | |
1063 | return; | |
1064 | }; | |
1065 | /* | |
1066 | * Note: no locking needed as we are guaranteed to be first | |
1067 | * on the sequence list | |
1068 | */ | |
1069 | seqid->sequence->counter++; | |
1070 | } | |
1071 | ||
1072 | void nfs_increment_open_seqid(int status, struct nfs_seqid *seqid) | |
1073 | { | |
a6796419 TM |
1074 | struct nfs4_state_owner *sp; |
1075 | ||
1076 | if (seqid == NULL) | |
1077 | return; | |
34dc1ad7 | 1078 | |
a6796419 | 1079 | sp = container_of(seqid->sequence, struct nfs4_state_owner, so_seqid); |
34dc1ad7 | 1080 | if (status == -NFS4ERR_BAD_SEQID) |
1da177e4 | 1081 | nfs4_drop_state_owner(sp); |
a6796419 | 1082 | if (!nfs4_has_session(sp->so_server->nfs_client)) |
34dc1ad7 | 1083 | nfs_increment_seqid(status, seqid); |
cee54fc9 TM |
1084 | } |
1085 | ||
1086 | /* | |
cee54fc9 TM |
1087 | * Increment the seqid if the LOCK/LOCKU succeeded, or |
1088 | * failed with a seqid incrementing error - | |
16a6ddc7 | 1089 | * see comments nfs4.h:seqid_mutating_error() |
cee54fc9 TM |
1090 | */ |
1091 | void nfs_increment_lock_seqid(int status, struct nfs_seqid *seqid) | |
1092 | { | |
a6796419 TM |
1093 | if (seqid != NULL) |
1094 | nfs_increment_seqid(status, seqid); | |
cee54fc9 TM |
1095 | } |
1096 | ||
1097 | int nfs_wait_on_sequence(struct nfs_seqid *seqid, struct rpc_task *task) | |
1098 | { | |
a6796419 | 1099 | struct nfs_seqid_counter *sequence; |
cee54fc9 TM |
1100 | int status = 0; |
1101 | ||
a6796419 TM |
1102 | if (seqid == NULL) |
1103 | goto out; | |
1104 | sequence = seqid->sequence; | |
cee54fc9 | 1105 | spin_lock(&sequence->lock); |
4601df20 | 1106 | seqid->task = task; |
2f74c0a0 TM |
1107 | if (list_empty(&seqid->list)) |
1108 | list_add_tail(&seqid->list, &sequence->list); | |
1109 | if (list_first_entry(&sequence->list, struct nfs_seqid, list) == seqid) | |
1110 | goto unlock; | |
5d00837b | 1111 | rpc_sleep_on(&sequence->wait, task, NULL); |
2f74c0a0 TM |
1112 | status = -EAGAIN; |
1113 | unlock: | |
cee54fc9 | 1114 | spin_unlock(&sequence->lock); |
a6796419 | 1115 | out: |
cee54fc9 | 1116 | return status; |
1da177e4 LT |
1117 | } |
1118 | ||
e005e804 | 1119 | static int nfs4_run_state_manager(void *); |
1da177e4 | 1120 | |
e005e804 | 1121 | static void nfs4_clear_state_manager_bit(struct nfs_client *clp) |
433fbe4c | 1122 | { |
4e857c58 | 1123 | smp_mb__before_atomic(); |
e005e804 | 1124 | clear_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state); |
4e857c58 | 1125 | smp_mb__after_atomic(); |
e005e804 | 1126 | wake_up_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING); |
433fbe4c TM |
1127 | rpc_wake_up(&clp->cl_rpcwaitq); |
1128 | } | |
1129 | ||
1da177e4 | 1130 | /* |
e005e804 | 1131 | * Schedule the nfs_client asynchronous state management routine |
1da177e4 | 1132 | */ |
b0d3ded1 | 1133 | void nfs4_schedule_state_manager(struct nfs_client *clp) |
1da177e4 | 1134 | { |
5043e900 | 1135 | struct task_struct *task; |
2446ab60 | 1136 | char buf[INET6_ADDRSTRLEN + sizeof("-manager") + 1]; |
1da177e4 | 1137 | |
e005e804 TM |
1138 | if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) != 0) |
1139 | return; | |
5043e900 TM |
1140 | __module_get(THIS_MODULE); |
1141 | atomic_inc(&clp->cl_count); | |
2446ab60 TM |
1142 | |
1143 | /* The rcu_read_lock() is not strictly necessary, as the state | |
1144 | * manager is the only thread that ever changes the rpc_xprt | |
1145 | * after it's initialized. At this point, we're single threaded. */ | |
1146 | rcu_read_lock(); | |
1147 | snprintf(buf, sizeof(buf), "%s-manager", | |
1148 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)); | |
1149 | rcu_read_unlock(); | |
f170168b | 1150 | task = kthread_run(nfs4_run_state_manager, clp, "%s", buf); |
2446ab60 TM |
1151 | if (IS_ERR(task)) { |
1152 | printk(KERN_ERR "%s: kthread_run: %ld\n", | |
1153 | __func__, PTR_ERR(task)); | |
1154 | nfs4_clear_state_manager_bit(clp); | |
1155 | nfs_put_client(clp); | |
1156 | module_put(THIS_MODULE); | |
1157 | } | |
1da177e4 LT |
1158 | } |
1159 | ||
1160 | /* | |
0400a6b0 | 1161 | * Schedule a lease recovery attempt |
1da177e4 | 1162 | */ |
0400a6b0 | 1163 | void nfs4_schedule_lease_recovery(struct nfs_client *clp) |
1da177e4 LT |
1164 | { |
1165 | if (!clp) | |
1166 | return; | |
e598d843 TM |
1167 | if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
1168 | set_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); | |
cc0a9843 TM |
1169 | dprintk("%s: scheduling lease recovery for server %s\n", __func__, |
1170 | clp->cl_hostname); | |
e005e804 | 1171 | nfs4_schedule_state_manager(clp); |
1da177e4 | 1172 | } |
9cb81968 | 1173 | EXPORT_SYMBOL_GPL(nfs4_schedule_lease_recovery); |
1da177e4 | 1174 | |
c9fdeb28 CL |
1175 | /** |
1176 | * nfs4_schedule_migration_recovery - trigger migration recovery | |
1177 | * | |
1178 | * @server: FSID that is migrating | |
1179 | * | |
1180 | * Returns zero if recovery has started, otherwise a negative NFS4ERR | |
1181 | * value is returned. | |
1182 | */ | |
1183 | int nfs4_schedule_migration_recovery(const struct nfs_server *server) | |
1184 | { | |
1185 | struct nfs_client *clp = server->nfs_client; | |
1186 | ||
1187 | if (server->fh_expire_type != NFS4_FH_PERSISTENT) { | |
1188 | pr_err("NFS: volatile file handles not supported (server %s)\n", | |
1189 | clp->cl_hostname); | |
1190 | return -NFS4ERR_IO; | |
1191 | } | |
1192 | ||
1193 | if (test_bit(NFS_MIG_FAILED, &server->mig_status)) | |
1194 | return -NFS4ERR_IO; | |
1195 | ||
1196 | dprintk("%s: scheduling migration recovery for (%llx:%llx) on %s\n", | |
1197 | __func__, | |
1198 | (unsigned long long)server->fsid.major, | |
1199 | (unsigned long long)server->fsid.minor, | |
1200 | clp->cl_hostname); | |
1201 | ||
1202 | set_bit(NFS_MIG_IN_TRANSITION, | |
1203 | &((struct nfs_server *)server)->mig_status); | |
1204 | set_bit(NFS4CLNT_MOVED, &clp->cl_state); | |
1205 | ||
1206 | nfs4_schedule_state_manager(clp); | |
1207 | return 0; | |
1208 | } | |
1209 | EXPORT_SYMBOL_GPL(nfs4_schedule_migration_recovery); | |
1210 | ||
b7f7a66e CL |
1211 | /** |
1212 | * nfs4_schedule_lease_moved_recovery - start lease-moved recovery | |
1213 | * | |
1214 | * @clp: server to check for moved leases | |
1215 | * | |
1216 | */ | |
1217 | void nfs4_schedule_lease_moved_recovery(struct nfs_client *clp) | |
1218 | { | |
1219 | dprintk("%s: scheduling lease-moved recovery for client ID %llx on %s\n", | |
1220 | __func__, clp->cl_clientid, clp->cl_hostname); | |
1221 | ||
1222 | set_bit(NFS4CLNT_LEASE_MOVED, &clp->cl_state); | |
1223 | nfs4_schedule_state_manager(clp); | |
1224 | } | |
1225 | EXPORT_SYMBOL_GPL(nfs4_schedule_lease_moved_recovery); | |
1226 | ||
33021279 TM |
1227 | int nfs4_wait_clnt_recover(struct nfs_client *clp) |
1228 | { | |
1229 | int res; | |
1230 | ||
1231 | might_sleep(); | |
1232 | ||
0625c2dd | 1233 | atomic_inc(&clp->cl_count); |
74316201 N |
1234 | res = wait_on_bit_action(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING, |
1235 | nfs_wait_bit_killable, TASK_KILLABLE); | |
33021279 | 1236 | if (res) |
0625c2dd | 1237 | goto out; |
33021279 | 1238 | if (clp->cl_cons_state < 0) |
0625c2dd CL |
1239 | res = clp->cl_cons_state; |
1240 | out: | |
1241 | nfs_put_client(clp); | |
1242 | return res; | |
33021279 TM |
1243 | } |
1244 | ||
1245 | int nfs4_client_recover_expired_lease(struct nfs_client *clp) | |
1246 | { | |
1247 | unsigned int loop; | |
1248 | int ret; | |
1249 | ||
1250 | for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) { | |
1251 | ret = nfs4_wait_clnt_recover(clp); | |
1252 | if (ret != 0) | |
1253 | break; | |
1254 | if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) && | |
1255 | !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state)) | |
1256 | break; | |
1257 | nfs4_schedule_state_manager(clp); | |
1258 | ret = -EIO; | |
1259 | } | |
1260 | return ret; | |
1261 | } | |
1262 | ||
ad1e3968 TM |
1263 | /* |
1264 | * nfs40_handle_cb_pathdown - return all delegations after NFS4ERR_CB_PATH_DOWN | |
1265 | * @clp: client to process | |
1266 | * | |
1267 | * Set the NFS4CLNT_LEASE_EXPIRED state in order to force a | |
1268 | * resend of the SETCLIENTID and hence re-establish the | |
1269 | * callback channel. Then return all existing delegations. | |
1270 | */ | |
1271 | static void nfs40_handle_cb_pathdown(struct nfs_client *clp) | |
1272 | { | |
1273 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1274 | nfs_expire_all_delegations(clp); | |
cc0a9843 TM |
1275 | dprintk("%s: handling CB_PATHDOWN recovery for server %s\n", __func__, |
1276 | clp->cl_hostname); | |
ad1e3968 TM |
1277 | } |
1278 | ||
042b60be TM |
1279 | void nfs4_schedule_path_down_recovery(struct nfs_client *clp) |
1280 | { | |
ad1e3968 | 1281 | nfs40_handle_cb_pathdown(clp); |
042b60be TM |
1282 | nfs4_schedule_state_manager(clp); |
1283 | } | |
1284 | ||
f9feab1e | 1285 | static int nfs4_state_mark_reclaim_reboot(struct nfs_client *clp, struct nfs4_state *state) |
b79a4a1b TM |
1286 | { |
1287 | ||
1288 | set_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); | |
1289 | /* Don't recover state that expired before the reboot */ | |
1290 | if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) { | |
1291 | clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); | |
1292 | return 0; | |
1293 | } | |
7eff03ae | 1294 | set_bit(NFS_OWNER_RECLAIM_REBOOT, &state->owner->so_flags); |
b79a4a1b TM |
1295 | set_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state); |
1296 | return 1; | |
1297 | } | |
1298 | ||
4f14c194 | 1299 | int nfs4_state_mark_reclaim_nograce(struct nfs_client *clp, struct nfs4_state *state) |
b79a4a1b TM |
1300 | { |
1301 | set_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags); | |
1302 | clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); | |
7eff03ae | 1303 | set_bit(NFS_OWNER_RECLAIM_NOGRACE, &state->owner->so_flags); |
b79a4a1b TM |
1304 | set_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state); |
1305 | return 1; | |
1306 | } | |
1307 | ||
5d422301 | 1308 | int nfs4_schedule_stateid_recovery(const struct nfs_server *server, struct nfs4_state *state) |
0400a6b0 TM |
1309 | { |
1310 | struct nfs_client *clp = server->nfs_client; | |
1311 | ||
5d422301 TM |
1312 | if (!nfs4_valid_open_stateid(state)) |
1313 | return -EBADF; | |
0400a6b0 | 1314 | nfs4_state_mark_reclaim_nograce(clp, state); |
cc0a9843 TM |
1315 | dprintk("%s: scheduling stateid recovery for server %s\n", __func__, |
1316 | clp->cl_hostname); | |
0400a6b0 | 1317 | nfs4_schedule_state_manager(clp); |
5d422301 | 1318 | return 0; |
0400a6b0 | 1319 | } |
9cb81968 | 1320 | EXPORT_SYMBOL_GPL(nfs4_schedule_stateid_recovery); |
0400a6b0 | 1321 | |
a1d0b5ee TM |
1322 | void nfs_inode_find_state_and_recover(struct inode *inode, |
1323 | const nfs4_stateid *stateid) | |
1324 | { | |
1325 | struct nfs_client *clp = NFS_SERVER(inode)->nfs_client; | |
1326 | struct nfs_inode *nfsi = NFS_I(inode); | |
1327 | struct nfs_open_context *ctx; | |
1328 | struct nfs4_state *state; | |
1329 | bool found = false; | |
1330 | ||
1331 | spin_lock(&inode->i_lock); | |
1332 | list_for_each_entry(ctx, &nfsi->open_files, list) { | |
1333 | state = ctx->state; | |
1334 | if (state == NULL) | |
1335 | continue; | |
1336 | if (!test_bit(NFS_DELEGATED_STATE, &state->flags)) | |
1337 | continue; | |
f597c537 | 1338 | if (!nfs4_stateid_match(&state->stateid, stateid)) |
a1d0b5ee TM |
1339 | continue; |
1340 | nfs4_state_mark_reclaim_nograce(clp, state); | |
1341 | found = true; | |
1342 | } | |
1343 | spin_unlock(&inode->i_lock); | |
1344 | if (found) | |
1345 | nfs4_schedule_state_manager(clp); | |
1346 | } | |
1347 | ||
c58c8441 TM |
1348 | static void nfs4_state_mark_open_context_bad(struct nfs4_state *state) |
1349 | { | |
1350 | struct inode *inode = state->inode; | |
1351 | struct nfs_inode *nfsi = NFS_I(inode); | |
1352 | struct nfs_open_context *ctx; | |
1353 | ||
1354 | spin_lock(&inode->i_lock); | |
1355 | list_for_each_entry(ctx, &nfsi->open_files, list) { | |
1356 | if (ctx->state != state) | |
1357 | continue; | |
1358 | set_bit(NFS_CONTEXT_BAD, &ctx->flags); | |
1359 | } | |
1360 | spin_unlock(&inode->i_lock); | |
1361 | } | |
1362 | ||
5d422301 TM |
1363 | static void nfs4_state_mark_recovery_failed(struct nfs4_state *state, int error) |
1364 | { | |
1365 | set_bit(NFS_STATE_RECOVERY_FAILED, &state->flags); | |
c58c8441 | 1366 | nfs4_state_mark_open_context_bad(state); |
5d422301 TM |
1367 | } |
1368 | ||
a1d0b5ee | 1369 | |
02860014 | 1370 | static int nfs4_reclaim_locks(struct nfs4_state *state, const struct nfs4_state_recovery_ops *ops) |
1da177e4 LT |
1371 | { |
1372 | struct inode *inode = state->inode; | |
19e03c57 | 1373 | struct nfs_inode *nfsi = NFS_I(inode); |
1da177e4 LT |
1374 | struct file_lock *fl; |
1375 | int status = 0; | |
5263e31e | 1376 | struct file_lock_context *flctx = inode->i_flctx; |
bd61e0a9 | 1377 | struct list_head *list; |
1da177e4 | 1378 | |
bd61e0a9 | 1379 | if (flctx == NULL) |
3f09df70 TM |
1380 | return 0; |
1381 | ||
bd61e0a9 JL |
1382 | list = &flctx->flc_posix; |
1383 | ||
3f09df70 | 1384 | /* Guard against delegation returns and new lock/unlock calls */ |
19e03c57 | 1385 | down_write(&nfsi->rwsem); |
6109c850 | 1386 | spin_lock(&flctx->flc_lock); |
bd61e0a9 JL |
1387 | restart: |
1388 | list_for_each_entry(fl, list, fl_list) { | |
5263e31e JL |
1389 | if (nfs_file_open_context(fl->fl_file)->state != state) |
1390 | continue; | |
6109c850 | 1391 | spin_unlock(&flctx->flc_lock); |
5263e31e JL |
1392 | status = ops->recover_lock(state, fl); |
1393 | switch (status) { | |
1394 | case 0: | |
1395 | break; | |
1396 | case -ESTALE: | |
1397 | case -NFS4ERR_ADMIN_REVOKED: | |
1398 | case -NFS4ERR_STALE_STATEID: | |
1399 | case -NFS4ERR_BAD_STATEID: | |
1400 | case -NFS4ERR_EXPIRED: | |
1401 | case -NFS4ERR_NO_GRACE: | |
1402 | case -NFS4ERR_STALE_CLIENTID: | |
1403 | case -NFS4ERR_BADSESSION: | |
1404 | case -NFS4ERR_BADSLOT: | |
1405 | case -NFS4ERR_BAD_HIGH_SLOT: | |
1406 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
1407 | goto out; | |
1408 | default: | |
1409 | pr_err("NFS: %s: unhandled error %d\n", | |
1410 | __func__, status); | |
1411 | case -ENOMEM: | |
1412 | case -NFS4ERR_DENIED: | |
1413 | case -NFS4ERR_RECLAIM_BAD: | |
1414 | case -NFS4ERR_RECLAIM_CONFLICT: | |
1415 | /* kill_proc(fl->fl_pid, SIGLOST, 1); */ | |
1416 | status = 0; | |
1417 | } | |
6109c850 | 1418 | spin_lock(&flctx->flc_lock); |
5263e31e | 1419 | } |
bd61e0a9 JL |
1420 | if (list == &flctx->flc_posix) { |
1421 | list = &flctx->flc_flock; | |
1422 | goto restart; | |
1423 | } | |
6109c850 | 1424 | spin_unlock(&flctx->flc_lock); |
965b5d67 | 1425 | out: |
19e03c57 | 1426 | up_write(&nfsi->rwsem); |
1da177e4 LT |
1427 | return status; |
1428 | } | |
1429 | ||
02860014 | 1430 | static int nfs4_reclaim_open_state(struct nfs4_state_owner *sp, const struct nfs4_state_recovery_ops *ops) |
1da177e4 LT |
1431 | { |
1432 | struct nfs4_state *state; | |
1433 | struct nfs4_lock_state *lock; | |
1434 | int status = 0; | |
1435 | ||
1436 | /* Note: we rely on the sp->so_states list being ordered | |
1437 | * so that we always reclaim open(O_RDWR) and/or open(O_WRITE) | |
1438 | * states first. | |
1439 | * This is needed to ensure that the server won't give us any | |
1440 | * read delegations that we have to return if, say, we are | |
1441 | * recovering after a network partition or a reboot from a | |
1442 | * server that doesn't support a grace period. | |
1443 | */ | |
fe1d8195 | 1444 | spin_lock(&sp->so_lock); |
abbec2da | 1445 | raw_write_seqcount_begin(&sp->so_reclaim_seqcount); |
c137afab | 1446 | restart: |
1da177e4 | 1447 | list_for_each_entry(state, &sp->so_states, open_states) { |
b79a4a1b TM |
1448 | if (!test_and_clear_bit(ops->state_flag_bit, &state->flags)) |
1449 | continue; | |
5d422301 TM |
1450 | if (!nfs4_valid_open_stateid(state)) |
1451 | continue; | |
1da177e4 LT |
1452 | if (state->state == 0) |
1453 | continue; | |
fe1d8195 TM |
1454 | atomic_inc(&state->count); |
1455 | spin_unlock(&sp->so_lock); | |
1da177e4 | 1456 | status = ops->recover_open(sp, state); |
1da177e4 | 1457 | if (status >= 0) { |
02860014 TM |
1458 | status = nfs4_reclaim_locks(state, ops); |
1459 | if (status >= 0) { | |
1acd1c30 | 1460 | if (!test_bit(NFS_DELEGATED_STATE, &state->flags)) { |
6686390b N |
1461 | spin_lock(&state->state_lock); |
1462 | list_for_each_entry(lock, &state->lock_states, ls_locks) { | |
1463 | if (!test_bit(NFS_LOCK_INITIALIZED, &lock->ls_flags)) | |
1464 | pr_warn_ratelimited("NFS: " | |
1465 | "%s: Lock reclaim " | |
1466 | "failed!\n", __func__); | |
1467 | } | |
1468 | spin_unlock(&state->state_lock); | |
02860014 | 1469 | } |
fe1d8195 | 1470 | nfs4_put_open_state(state); |
c137afab | 1471 | spin_lock(&sp->so_lock); |
fe1d8195 | 1472 | goto restart; |
1da177e4 | 1473 | } |
1da177e4 LT |
1474 | } |
1475 | switch (status) { | |
1476 | default: | |
3660cd43 AA |
1477 | printk(KERN_ERR "NFS: %s: unhandled error %d\n", |
1478 | __func__, status); | |
1da177e4 | 1479 | case -ENOENT: |
965b5d67 | 1480 | case -ENOMEM: |
b79a4a1b | 1481 | case -ESTALE: |
3660cd43 | 1482 | /* Open state on this file cannot be recovered */ |
5d422301 | 1483 | nfs4_state_mark_recovery_failed(state, status); |
1da177e4 | 1484 | break; |
91876b13 TM |
1485 | case -EAGAIN: |
1486 | ssleep(1); | |
965b5d67 TM |
1487 | case -NFS4ERR_ADMIN_REVOKED: |
1488 | case -NFS4ERR_STALE_STATEID: | |
1489 | case -NFS4ERR_BAD_STATEID: | |
b79a4a1b TM |
1490 | case -NFS4ERR_RECLAIM_BAD: |
1491 | case -NFS4ERR_RECLAIM_CONFLICT: | |
1f0e890d | 1492 | nfs4_state_mark_reclaim_nograce(sp->so_server->nfs_client, state); |
b79a4a1b | 1493 | break; |
1da177e4 LT |
1494 | case -NFS4ERR_EXPIRED: |
1495 | case -NFS4ERR_NO_GRACE: | |
1f0e890d | 1496 | nfs4_state_mark_reclaim_nograce(sp->so_server->nfs_client, state); |
1da177e4 | 1497 | case -NFS4ERR_STALE_CLIENTID: |
9c4c761a TM |
1498 | case -NFS4ERR_BADSESSION: |
1499 | case -NFS4ERR_BADSLOT: | |
1500 | case -NFS4ERR_BAD_HIGH_SLOT: | |
1501 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
1da177e4 LT |
1502 | goto out_err; |
1503 | } | |
fe1d8195 | 1504 | nfs4_put_open_state(state); |
c137afab | 1505 | spin_lock(&sp->so_lock); |
fe1d8195 | 1506 | goto restart; |
1da177e4 | 1507 | } |
abbec2da | 1508 | raw_write_seqcount_end(&sp->so_reclaim_seqcount); |
fe1d8195 | 1509 | spin_unlock(&sp->so_lock); |
1da177e4 LT |
1510 | return 0; |
1511 | out_err: | |
fe1d8195 | 1512 | nfs4_put_open_state(state); |
c137afab | 1513 | spin_lock(&sp->so_lock); |
abbec2da | 1514 | raw_write_seqcount_end(&sp->so_reclaim_seqcount); |
c137afab | 1515 | spin_unlock(&sp->so_lock); |
1da177e4 LT |
1516 | return status; |
1517 | } | |
1518 | ||
b79a4a1b TM |
1519 | static void nfs4_clear_open_state(struct nfs4_state *state) |
1520 | { | |
1521 | struct nfs4_lock_state *lock; | |
1522 | ||
1523 | clear_bit(NFS_DELEGATED_STATE, &state->flags); | |
1524 | clear_bit(NFS_O_RDONLY_STATE, &state->flags); | |
1525 | clear_bit(NFS_O_WRONLY_STATE, &state->flags); | |
1526 | clear_bit(NFS_O_RDWR_STATE, &state->flags); | |
4b44b40e | 1527 | spin_lock(&state->state_lock); |
b79a4a1b | 1528 | list_for_each_entry(lock, &state->lock_states, ls_locks) { |
b79a4a1b | 1529 | lock->ls_seqid.flags = 0; |
795a88c9 | 1530 | clear_bit(NFS_LOCK_INITIALIZED, &lock->ls_flags); |
b79a4a1b | 1531 | } |
4b44b40e | 1532 | spin_unlock(&state->state_lock); |
b79a4a1b TM |
1533 | } |
1534 | ||
24d292b8 CL |
1535 | static void nfs4_reset_seqids(struct nfs_server *server, |
1536 | int (*mark_reclaim)(struct nfs_client *clp, struct nfs4_state *state)) | |
cee54fc9 | 1537 | { |
24d292b8 | 1538 | struct nfs_client *clp = server->nfs_client; |
cee54fc9 | 1539 | struct nfs4_state_owner *sp; |
9f958ab8 | 1540 | struct rb_node *pos; |
cee54fc9 | 1541 | struct nfs4_state *state; |
cee54fc9 | 1542 | |
24d292b8 CL |
1543 | spin_lock(&clp->cl_lock); |
1544 | for (pos = rb_first(&server->state_owners); | |
1545 | pos != NULL; | |
1546 | pos = rb_next(pos)) { | |
1547 | sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); | |
cee54fc9 | 1548 | sp->so_seqid.flags = 0; |
ec073428 | 1549 | spin_lock(&sp->so_lock); |
cee54fc9 | 1550 | list_for_each_entry(state, &sp->so_states, open_states) { |
b79a4a1b TM |
1551 | if (mark_reclaim(clp, state)) |
1552 | nfs4_clear_open_state(state); | |
cee54fc9 | 1553 | } |
ec073428 | 1554 | spin_unlock(&sp->so_lock); |
cee54fc9 | 1555 | } |
24d292b8 CL |
1556 | spin_unlock(&clp->cl_lock); |
1557 | } | |
1558 | ||
1559 | static void nfs4_state_mark_reclaim_helper(struct nfs_client *clp, | |
1560 | int (*mark_reclaim)(struct nfs_client *clp, struct nfs4_state *state)) | |
1561 | { | |
1562 | struct nfs_server *server; | |
1563 | ||
1564 | rcu_read_lock(); | |
1565 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) | |
1566 | nfs4_reset_seqids(server, mark_reclaim); | |
1567 | rcu_read_unlock(); | |
cee54fc9 TM |
1568 | } |
1569 | ||
b79a4a1b TM |
1570 | static void nfs4_state_start_reclaim_reboot(struct nfs_client *clp) |
1571 | { | |
1572 | /* Mark all delegations for reclaim */ | |
1573 | nfs_delegation_mark_reclaim(clp); | |
1574 | nfs4_state_mark_reclaim_helper(clp, nfs4_state_mark_reclaim_reboot); | |
1575 | } | |
1576 | ||
fce5c838 | 1577 | static void nfs4_reclaim_complete(struct nfs_client *clp, |
965e9c23 TM |
1578 | const struct nfs4_state_recovery_ops *ops, |
1579 | struct rpc_cred *cred) | |
fce5c838 RL |
1580 | { |
1581 | /* Notify the server we're done reclaiming our state */ | |
1582 | if (ops->reclaim_complete) | |
965e9c23 | 1583 | (void)ops->reclaim_complete(clp, cred); |
fce5c838 RL |
1584 | } |
1585 | ||
24d292b8 | 1586 | static void nfs4_clear_reclaim_server(struct nfs_server *server) |
b79a4a1b | 1587 | { |
24d292b8 | 1588 | struct nfs_client *clp = server->nfs_client; |
b79a4a1b TM |
1589 | struct nfs4_state_owner *sp; |
1590 | struct rb_node *pos; | |
1591 | struct nfs4_state *state; | |
1592 | ||
24d292b8 CL |
1593 | spin_lock(&clp->cl_lock); |
1594 | for (pos = rb_first(&server->state_owners); | |
1595 | pos != NULL; | |
1596 | pos = rb_next(pos)) { | |
1597 | sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); | |
b79a4a1b TM |
1598 | spin_lock(&sp->so_lock); |
1599 | list_for_each_entry(state, &sp->so_states, open_states) { | |
24d292b8 CL |
1600 | if (!test_and_clear_bit(NFS_STATE_RECLAIM_REBOOT, |
1601 | &state->flags)) | |
b79a4a1b TM |
1602 | continue; |
1603 | nfs4_state_mark_reclaim_nograce(clp, state); | |
1604 | } | |
1605 | spin_unlock(&sp->so_lock); | |
1606 | } | |
24d292b8 CL |
1607 | spin_unlock(&clp->cl_lock); |
1608 | } | |
1609 | ||
1610 | static int nfs4_state_clear_reclaim_reboot(struct nfs_client *clp) | |
1611 | { | |
1612 | struct nfs_server *server; | |
1613 | ||
1614 | if (!test_and_clear_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) | |
1615 | return 0; | |
1616 | ||
1617 | rcu_read_lock(); | |
1618 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) | |
1619 | nfs4_clear_reclaim_server(server); | |
1620 | rcu_read_unlock(); | |
b79a4a1b TM |
1621 | |
1622 | nfs_delegation_reap_unclaimed(clp); | |
6eaa6149 TM |
1623 | return 1; |
1624 | } | |
1625 | ||
1626 | static void nfs4_state_end_reclaim_reboot(struct nfs_client *clp) | |
1627 | { | |
965e9c23 TM |
1628 | const struct nfs4_state_recovery_ops *ops; |
1629 | struct rpc_cred *cred; | |
1630 | ||
6eaa6149 TM |
1631 | if (!nfs4_state_clear_reclaim_reboot(clp)) |
1632 | return; | |
965e9c23 | 1633 | ops = clp->cl_mvops->reboot_recovery_ops; |
73d8bde5 | 1634 | cred = nfs4_get_clid_cred(clp); |
965e9c23 TM |
1635 | nfs4_reclaim_complete(clp, ops, cred); |
1636 | put_rpccred(cred); | |
b79a4a1b TM |
1637 | } |
1638 | ||
1639 | static void nfs_delegation_clear_all(struct nfs_client *clp) | |
1640 | { | |
1641 | nfs_delegation_mark_reclaim(clp); | |
1642 | nfs_delegation_reap_unclaimed(clp); | |
1643 | } | |
1644 | ||
1645 | static void nfs4_state_start_reclaim_nograce(struct nfs_client *clp) | |
1646 | { | |
1647 | nfs_delegation_clear_all(clp); | |
1648 | nfs4_state_mark_reclaim_helper(clp, nfs4_state_mark_reclaim_nograce); | |
1649 | } | |
1650 | ||
4f7cdf18 | 1651 | static int nfs4_recovery_handle_error(struct nfs_client *clp, int error) |
e598d843 TM |
1652 | { |
1653 | switch (error) { | |
4f38e4aa TM |
1654 | case 0: |
1655 | break; | |
e598d843 | 1656 | case -NFS4ERR_CB_PATH_DOWN: |
ad1e3968 | 1657 | nfs40_handle_cb_pathdown(clp); |
4f38e4aa | 1658 | break; |
c8b7ae3d TM |
1659 | case -NFS4ERR_NO_GRACE: |
1660 | nfs4_state_end_reclaim_reboot(clp); | |
4f38e4aa | 1661 | break; |
e598d843 | 1662 | case -NFS4ERR_STALE_CLIENTID: |
e598d843 | 1663 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); |
6eaa6149 | 1664 | nfs4_state_clear_reclaim_reboot(clp); |
e598d843 TM |
1665 | nfs4_state_start_reclaim_reboot(clp); |
1666 | break; | |
1667 | case -NFS4ERR_EXPIRED: | |
1668 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1669 | nfs4_state_start_reclaim_nograce(clp); | |
8ba9bf8e | 1670 | break; |
c3fad1b1 AA |
1671 | case -NFS4ERR_BADSESSION: |
1672 | case -NFS4ERR_BADSLOT: | |
1673 | case -NFS4ERR_BAD_HIGH_SLOT: | |
1674 | case -NFS4ERR_DEADSESSION: | |
c3fad1b1 AA |
1675 | case -NFS4ERR_SEQ_FALSE_RETRY: |
1676 | case -NFS4ERR_SEQ_MISORDERED: | |
6df08189 | 1677 | set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); |
0b9e2d41 | 1678 | /* Zero session reset errors */ |
4f38e4aa | 1679 | break; |
7c5d7256 TM |
1680 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: |
1681 | set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); | |
1682 | break; | |
4f38e4aa | 1683 | default: |
cc0a9843 TM |
1684 | dprintk("%s: failed to handle error %d for server %s\n", |
1685 | __func__, error, clp->cl_hostname); | |
4f38e4aa | 1686 | return error; |
e598d843 | 1687 | } |
cc0a9843 TM |
1688 | dprintk("%s: handled error %d for server %s\n", __func__, error, |
1689 | clp->cl_hostname); | |
4f38e4aa | 1690 | return 0; |
e598d843 TM |
1691 | } |
1692 | ||
02860014 | 1693 | static int nfs4_do_reclaim(struct nfs_client *clp, const struct nfs4_state_recovery_ops *ops) |
1da177e4 | 1694 | { |
24d292b8 CL |
1695 | struct nfs4_state_owner *sp; |
1696 | struct nfs_server *server; | |
9f958ab8 | 1697 | struct rb_node *pos; |
1da177e4 LT |
1698 | int status = 0; |
1699 | ||
7eff03ae | 1700 | restart: |
24d292b8 CL |
1701 | rcu_read_lock(); |
1702 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { | |
0aaaf5c4 | 1703 | nfs4_purge_state_owners(server); |
24d292b8 CL |
1704 | spin_lock(&clp->cl_lock); |
1705 | for (pos = rb_first(&server->state_owners); | |
1706 | pos != NULL; | |
1707 | pos = rb_next(pos)) { | |
1708 | sp = rb_entry(pos, | |
1709 | struct nfs4_state_owner, so_server_node); | |
1710 | if (!test_and_clear_bit(ops->owner_flag_bit, | |
1711 | &sp->so_flags)) | |
1712 | continue; | |
1713 | atomic_inc(&sp->so_count); | |
1714 | spin_unlock(&clp->cl_lock); | |
1715 | rcu_read_unlock(); | |
1716 | ||
1717 | status = nfs4_reclaim_open_state(sp, ops); | |
1718 | if (status < 0) { | |
1719 | set_bit(ops->owner_flag_bit, &sp->so_flags); | |
1720 | nfs4_put_state_owner(sp); | |
df817ba3 TM |
1721 | status = nfs4_recovery_handle_error(clp, status); |
1722 | return (status != 0) ? status : -EAGAIN; | |
24d292b8 CL |
1723 | } |
1724 | ||
7eff03ae | 1725 | nfs4_put_state_owner(sp); |
24d292b8 | 1726 | goto restart; |
7eff03ae | 1727 | } |
24d292b8 | 1728 | spin_unlock(&clp->cl_lock); |
02860014 | 1729 | } |
24d292b8 | 1730 | rcu_read_unlock(); |
df817ba3 | 1731 | return 0; |
02860014 TM |
1732 | } |
1733 | ||
1734 | static int nfs4_check_lease(struct nfs_client *clp) | |
1735 | { | |
1736 | struct rpc_cred *cred; | |
c48f4f35 TM |
1737 | const struct nfs4_state_maintenance_ops *ops = |
1738 | clp->cl_mvops->state_renewal_ops; | |
4f38e4aa | 1739 | int status; |
1da177e4 | 1740 | |
0f605b56 TM |
1741 | /* Is the client already known to have an expired lease? */ |
1742 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) | |
1743 | return 0; | |
a7b72103 AA |
1744 | spin_lock(&clp->cl_lock); |
1745 | cred = ops->get_state_renewal_cred_locked(clp); | |
1746 | spin_unlock(&clp->cl_lock); | |
0f605b56 | 1747 | if (cred == NULL) { |
73d8bde5 | 1748 | cred = nfs4_get_clid_cred(clp); |
4f38e4aa | 1749 | status = -ENOKEY; |
0f605b56 TM |
1750 | if (cred == NULL) |
1751 | goto out; | |
286d7d6a | 1752 | } |
8e69514f | 1753 | status = ops->renew_lease(clp, cred); |
0f605b56 | 1754 | put_rpccred(cred); |
bc7a05ca TM |
1755 | if (status == -ETIMEDOUT) { |
1756 | set_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); | |
1757 | return 0; | |
1758 | } | |
0f605b56 | 1759 | out: |
4f7cdf18 | 1760 | return nfs4_recovery_handle_error(clp, status); |
02860014 TM |
1761 | } |
1762 | ||
47b803c8 AA |
1763 | /* Set NFS4CLNT_LEASE_EXPIRED and reclaim reboot state for all v4.0 errors |
1764 | * and for recoverable errors on EXCHANGE_ID for v4.1 | |
2a6ee6aa TM |
1765 | */ |
1766 | static int nfs4_handle_reclaim_lease_error(struct nfs_client *clp, int status) | |
1767 | { | |
1768 | switch (status) { | |
89a21736 TM |
1769 | case -NFS4ERR_SEQ_MISORDERED: |
1770 | if (test_and_set_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) | |
1771 | return -ESERVERFAULT; | |
1772 | /* Lease confirmation error: retry after purging the lease */ | |
1773 | ssleep(1); | |
47b803c8 AA |
1774 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
1775 | break; | |
2a6ee6aa TM |
1776 | case -NFS4ERR_STALE_CLIENTID: |
1777 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); | |
47b803c8 | 1778 | nfs4_state_start_reclaim_reboot(clp); |
2a6ee6aa | 1779 | break; |
de734831 CL |
1780 | case -NFS4ERR_CLID_INUSE: |
1781 | pr_err("NFS: Server %s reports our clientid is in use\n", | |
1782 | clp->cl_hostname); | |
1783 | nfs_mark_client_ready(clp, -EPERM); | |
1784 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); | |
1785 | return -EPERM; | |
2a6ee6aa | 1786 | case -EACCES: |
2a6ee6aa TM |
1787 | case -NFS4ERR_DELAY: |
1788 | case -ETIMEDOUT: | |
1789 | case -EAGAIN: | |
1790 | ssleep(1); | |
1791 | break; | |
1792 | ||
1793 | case -NFS4ERR_MINOR_VERS_MISMATCH: | |
1794 | if (clp->cl_cons_state == NFS_CS_SESSION_INITING) | |
1795 | nfs_mark_client_ready(clp, -EPROTONOSUPPORT); | |
cc0a9843 TM |
1796 | dprintk("%s: exit with error %d for server %s\n", |
1797 | __func__, -EPROTONOSUPPORT, clp->cl_hostname); | |
2a6ee6aa | 1798 | return -EPROTONOSUPPORT; |
2a6ee6aa TM |
1799 | case -NFS4ERR_NOT_SAME: /* FixMe: implement recovery |
1800 | * in nfs4_exchange_id */ | |
1801 | default: | |
cc0a9843 TM |
1802 | dprintk("%s: exit with error %d for server %s\n", __func__, |
1803 | status, clp->cl_hostname); | |
2a6ee6aa TM |
1804 | return status; |
1805 | } | |
1806 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
cc0a9843 TM |
1807 | dprintk("%s: handled error %d for server %s\n", __func__, status, |
1808 | clp->cl_hostname); | |
2a6ee6aa TM |
1809 | return 0; |
1810 | } | |
1811 | ||
b42353ff | 1812 | static int nfs4_establish_lease(struct nfs_client *clp) |
02860014 TM |
1813 | { |
1814 | struct rpc_cred *cred; | |
c48f4f35 TM |
1815 | const struct nfs4_state_recovery_ops *ops = |
1816 | clp->cl_mvops->reboot_recovery_ops; | |
2a6ee6aa | 1817 | int status; |
02860014 | 1818 | |
73d8bde5 | 1819 | cred = nfs4_get_clid_cred(clp); |
2a6ee6aa TM |
1820 | if (cred == NULL) |
1821 | return -ENOENT; | |
1822 | status = ops->establish_clid(clp, cred); | |
1823 | put_rpccred(cred); | |
1824 | if (status != 0) | |
b42353ff TM |
1825 | return status; |
1826 | pnfs_destroy_all_layouts(clp); | |
1827 | return 0; | |
1828 | } | |
1829 | ||
6bbb4ae8 CL |
1830 | /* |
1831 | * Returns zero or a negative errno. NFS4ERR values are converted | |
1832 | * to local errno values. | |
1833 | */ | |
b42353ff TM |
1834 | static int nfs4_reclaim_lease(struct nfs_client *clp) |
1835 | { | |
1836 | int status; | |
1837 | ||
1838 | status = nfs4_establish_lease(clp); | |
1839 | if (status < 0) | |
1840 | return nfs4_handle_reclaim_lease_error(clp, status); | |
1841 | if (test_and_clear_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state)) | |
1842 | nfs4_state_start_reclaim_nograce(clp); | |
1843 | if (!test_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) | |
1844 | set_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state); | |
1845 | clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); | |
1846 | clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1847 | return 0; | |
1848 | } | |
1849 | ||
1850 | static int nfs4_purge_lease(struct nfs_client *clp) | |
1851 | { | |
1852 | int status; | |
1853 | ||
1854 | status = nfs4_establish_lease(clp); | |
1855 | if (status < 0) | |
2a6ee6aa | 1856 | return nfs4_handle_reclaim_lease_error(clp, status); |
b42353ff TM |
1857 | clear_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state); |
1858 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1859 | nfs4_state_start_reclaim_nograce(clp); | |
2a6ee6aa | 1860 | return 0; |
02860014 TM |
1861 | } |
1862 | ||
c9fdeb28 CL |
1863 | /* |
1864 | * Try remote migration of one FSID from a source server to a | |
1865 | * destination server. The source server provides a list of | |
1866 | * potential destinations. | |
1867 | * | |
1868 | * Returns zero or a negative NFS4ERR status code. | |
1869 | */ | |
1870 | static int nfs4_try_migration(struct nfs_server *server, struct rpc_cred *cred) | |
1871 | { | |
1872 | struct nfs_client *clp = server->nfs_client; | |
1873 | struct nfs4_fs_locations *locations = NULL; | |
1874 | struct inode *inode; | |
1875 | struct page *page; | |
1876 | int status, result; | |
1877 | ||
1878 | dprintk("--> %s: FSID %llx:%llx on \"%s\"\n", __func__, | |
1879 | (unsigned long long)server->fsid.major, | |
1880 | (unsigned long long)server->fsid.minor, | |
1881 | clp->cl_hostname); | |
1882 | ||
1883 | result = 0; | |
1884 | page = alloc_page(GFP_KERNEL); | |
1885 | locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL); | |
1886 | if (page == NULL || locations == NULL) { | |
1887 | dprintk("<-- %s: no memory\n", __func__); | |
1888 | goto out; | |
1889 | } | |
1890 | ||
1891 | inode = server->super->s_root->d_inode; | |
1892 | result = nfs4_proc_get_locations(inode, locations, page, cred); | |
1893 | if (result) { | |
1894 | dprintk("<-- %s: failed to retrieve fs_locations: %d\n", | |
1895 | __func__, result); | |
1896 | goto out; | |
1897 | } | |
1898 | ||
1899 | result = -NFS4ERR_NXIO; | |
1900 | if (!(locations->fattr.valid & NFS_ATTR_FATTR_V4_LOCATIONS)) { | |
1901 | dprintk("<-- %s: No fs_locations data, migration skipped\n", | |
1902 | __func__); | |
1903 | goto out; | |
1904 | } | |
1905 | ||
1906 | nfs4_begin_drain_session(clp); | |
1907 | ||
1908 | status = nfs4_replace_transport(server, locations); | |
1909 | if (status != 0) { | |
1910 | dprintk("<-- %s: failed to replace transport: %d\n", | |
1911 | __func__, status); | |
1912 | goto out; | |
1913 | } | |
1914 | ||
1915 | result = 0; | |
1916 | dprintk("<-- %s: migration succeeded\n", __func__); | |
1917 | ||
1918 | out: | |
1919 | if (page != NULL) | |
1920 | __free_page(page); | |
1921 | kfree(locations); | |
1922 | if (result) { | |
1923 | pr_err("NFS: migration recovery failed (server %s)\n", | |
1924 | clp->cl_hostname); | |
1925 | set_bit(NFS_MIG_FAILED, &server->mig_status); | |
1926 | } | |
1927 | return result; | |
1928 | } | |
1929 | ||
1930 | /* | |
1931 | * Returns zero or a negative NFS4ERR status code. | |
1932 | */ | |
1933 | static int nfs4_handle_migration(struct nfs_client *clp) | |
1934 | { | |
1935 | const struct nfs4_state_maintenance_ops *ops = | |
1936 | clp->cl_mvops->state_renewal_ops; | |
1937 | struct nfs_server *server; | |
1938 | struct rpc_cred *cred; | |
1939 | ||
1940 | dprintk("%s: migration reported on \"%s\"\n", __func__, | |
1941 | clp->cl_hostname); | |
1942 | ||
1943 | spin_lock(&clp->cl_lock); | |
1944 | cred = ops->get_state_renewal_cred_locked(clp); | |
1945 | spin_unlock(&clp->cl_lock); | |
1946 | if (cred == NULL) | |
1947 | return -NFS4ERR_NOENT; | |
1948 | ||
1949 | clp->cl_mig_gen++; | |
1950 | restart: | |
1951 | rcu_read_lock(); | |
1952 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { | |
1953 | int status; | |
1954 | ||
1955 | if (server->mig_gen == clp->cl_mig_gen) | |
1956 | continue; | |
1957 | server->mig_gen = clp->cl_mig_gen; | |
1958 | ||
1959 | if (!test_and_clear_bit(NFS_MIG_IN_TRANSITION, | |
1960 | &server->mig_status)) | |
1961 | continue; | |
1962 | ||
1963 | rcu_read_unlock(); | |
1964 | status = nfs4_try_migration(server, cred); | |
1965 | if (status < 0) { | |
1966 | put_rpccred(cred); | |
1967 | return status; | |
1968 | } | |
1969 | goto restart; | |
1970 | } | |
1971 | rcu_read_unlock(); | |
1972 | put_rpccred(cred); | |
1973 | return 0; | |
1974 | } | |
1975 | ||
b7f7a66e CL |
1976 | /* |
1977 | * Test each nfs_server on the clp's cl_superblocks list to see | |
1978 | * if it's moved to another server. Stop when the server no longer | |
1979 | * returns NFS4ERR_LEASE_MOVED. | |
1980 | */ | |
1981 | static int nfs4_handle_lease_moved(struct nfs_client *clp) | |
1982 | { | |
1983 | const struct nfs4_state_maintenance_ops *ops = | |
1984 | clp->cl_mvops->state_renewal_ops; | |
1985 | struct nfs_server *server; | |
1986 | struct rpc_cred *cred; | |
1987 | ||
1988 | dprintk("%s: lease moved reported on \"%s\"\n", __func__, | |
1989 | clp->cl_hostname); | |
1990 | ||
1991 | spin_lock(&clp->cl_lock); | |
1992 | cred = ops->get_state_renewal_cred_locked(clp); | |
1993 | spin_unlock(&clp->cl_lock); | |
1994 | if (cred == NULL) | |
1995 | return -NFS4ERR_NOENT; | |
1996 | ||
1997 | clp->cl_mig_gen++; | |
1998 | restart: | |
1999 | rcu_read_lock(); | |
2000 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { | |
2001 | struct inode *inode; | |
2002 | int status; | |
2003 | ||
2004 | if (server->mig_gen == clp->cl_mig_gen) | |
2005 | continue; | |
2006 | server->mig_gen = clp->cl_mig_gen; | |
2007 | ||
2008 | rcu_read_unlock(); | |
2009 | ||
2010 | inode = server->super->s_root->d_inode; | |
2011 | status = nfs4_proc_fsid_present(inode, cred); | |
2012 | if (status != -NFS4ERR_MOVED) | |
2013 | goto restart; /* wasn't this one */ | |
2014 | if (nfs4_try_migration(server, cred) == -NFS4ERR_LEASE_MOVED) | |
2015 | goto restart; /* there are more */ | |
2016 | goto out; | |
2017 | } | |
2018 | rcu_read_unlock(); | |
2019 | ||
2020 | out: | |
2021 | put_rpccred(cred); | |
2022 | return 0; | |
2023 | } | |
2024 | ||
05f4c350 CL |
2025 | /** |
2026 | * nfs4_discover_server_trunking - Detect server IP address trunking | |
2027 | * | |
2028 | * @clp: nfs_client under test | |
2029 | * @result: OUT: found nfs_client, or clp | |
2030 | * | |
2031 | * Returns zero or a negative errno. If zero is returned, | |
2032 | * an nfs_client pointer is planted in "result". | |
2033 | * | |
2034 | * Note: since we are invoked in process context, and | |
2035 | * not from inside the state manager, we cannot use | |
2036 | * nfs4_handle_reclaim_lease_error(). | |
2037 | */ | |
2038 | int nfs4_discover_server_trunking(struct nfs_client *clp, | |
2039 | struct nfs_client **result) | |
2040 | { | |
2041 | const struct nfs4_state_recovery_ops *ops = | |
2042 | clp->cl_mvops->reboot_recovery_ops; | |
05f4c350 CL |
2043 | struct rpc_clnt *clnt; |
2044 | struct rpc_cred *cred; | |
4edaa308 | 2045 | int i, status; |
05f4c350 CL |
2046 | |
2047 | dprintk("NFS: %s: testing '%s'\n", __func__, clp->cl_hostname); | |
2048 | ||
05f4c350 | 2049 | clnt = clp->cl_rpcclient; |
05f4c350 CL |
2050 | i = 0; |
2051 | ||
2052 | mutex_lock(&nfs_clid_init_mutex); | |
05f4c350 | 2053 | again: |
ea33e6c3 | 2054 | status = -ENOENT; |
73d8bde5 | 2055 | cred = nfs4_get_clid_cred(clp); |
05f4c350 CL |
2056 | if (cred == NULL) |
2057 | goto out_unlock; | |
2058 | ||
2059 | status = ops->detect_trunking(clp, result, cred); | |
2060 | put_rpccred(cred); | |
2061 | switch (status) { | |
2062 | case 0: | |
2063 | break; | |
05f4c350 | 2064 | case -ETIMEDOUT: |
150e7260 TM |
2065 | if (clnt->cl_softrtry) |
2066 | break; | |
2067 | case -NFS4ERR_DELAY: | |
05f4c350 CL |
2068 | case -EAGAIN: |
2069 | ssleep(1); | |
202c312d | 2070 | case -NFS4ERR_STALE_CLIENTID: |
05f4c350 CL |
2071 | dprintk("NFS: %s after status %d, retrying\n", |
2072 | __func__, status); | |
2073 | goto again; | |
4edaa308 | 2074 | case -EACCES: |
d688f7b8 CL |
2075 | if (i++ == 0) { |
2076 | nfs4_root_machine_cred(clp); | |
2077 | goto again; | |
2078 | } | |
6d769f1e | 2079 | if (clnt->cl_auth->au_flavor == RPC_AUTH_UNIX) |
4edaa308 | 2080 | break; |
05f4c350 CL |
2081 | case -NFS4ERR_CLID_INUSE: |
2082 | case -NFS4ERR_WRONGSEC: | |
6d769f1e JL |
2083 | /* No point in retrying if we already used RPC_AUTH_UNIX */ |
2084 | if (clnt->cl_auth->au_flavor == RPC_AUTH_UNIX) { | |
2085 | status = -EPERM; | |
2086 | break; | |
2087 | } | |
79d852bf | 2088 | clnt = rpc_clone_client_set_auth(clnt, RPC_AUTH_UNIX); |
05f4c350 CL |
2089 | if (IS_ERR(clnt)) { |
2090 | status = PTR_ERR(clnt); | |
2091 | break; | |
2092 | } | |
b193d59a TM |
2093 | /* Note: this is safe because we haven't yet marked the |
2094 | * client as ready, so we are the only user of | |
2095 | * clp->cl_rpcclient | |
2096 | */ | |
2097 | clnt = xchg(&clp->cl_rpcclient, clnt); | |
2098 | rpc_shutdown_client(clnt); | |
2099 | clnt = clp->cl_rpcclient; | |
05f4c350 CL |
2100 | goto again; |
2101 | ||
2102 | case -NFS4ERR_MINOR_VERS_MISMATCH: | |
2103 | status = -EPROTONOSUPPORT; | |
2104 | break; | |
2105 | ||
2106 | case -EKEYEXPIRED: | |
05f4c350 CL |
2107 | case -NFS4ERR_NOT_SAME: /* FixMe: implement recovery |
2108 | * in nfs4_exchange_id */ | |
2109 | status = -EKEYEXPIRED; | |
ea33e6c3 TM |
2110 | break; |
2111 | default: | |
2112 | pr_warn("NFS: %s unhandled error %d. Exiting with error EIO\n", | |
2113 | __func__, status); | |
2114 | status = -EIO; | |
05f4c350 CL |
2115 | } |
2116 | ||
2117 | out_unlock: | |
2118 | mutex_unlock(&nfs_clid_init_mutex); | |
05f4c350 CL |
2119 | dprintk("NFS: %s: status = %d\n", __func__, status); |
2120 | return status; | |
2121 | } | |
2122 | ||
76db6d95 | 2123 | #ifdef CONFIG_NFS_V4_1 |
9f594791 | 2124 | void nfs4_schedule_session_recovery(struct nfs4_session *session, int err) |
0400a6b0 | 2125 | { |
444f72fe TM |
2126 | struct nfs_client *clp = session->clp; |
2127 | ||
9f594791 TM |
2128 | switch (err) { |
2129 | default: | |
2130 | set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); | |
2131 | break; | |
2132 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
2133 | set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); | |
2134 | } | |
444f72fe | 2135 | nfs4_schedule_lease_recovery(clp); |
0400a6b0 | 2136 | } |
cbdabc7f | 2137 | EXPORT_SYMBOL_GPL(nfs4_schedule_session_recovery); |
0400a6b0 | 2138 | |
ac074835 TM |
2139 | static void nfs41_ping_server(struct nfs_client *clp) |
2140 | { | |
2141 | /* Use CHECK_LEASE to ping the server with a SEQUENCE */ | |
2142 | set_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); | |
2143 | nfs4_schedule_state_manager(clp); | |
2144 | } | |
2145 | ||
2146 | void nfs41_server_notify_target_slotid_update(struct nfs_client *clp) | |
2147 | { | |
2148 | nfs41_ping_server(clp); | |
2149 | } | |
2150 | ||
c10e4498 TM |
2151 | void nfs41_server_notify_highest_slotid_update(struct nfs_client *clp) |
2152 | { | |
2153 | nfs41_ping_server(clp); | |
2154 | } | |
2155 | ||
0f79fd6f TM |
2156 | static void nfs4_reset_all_state(struct nfs_client *clp) |
2157 | { | |
2158 | if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) == 0) { | |
2c820d9a | 2159 | set_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state); |
be0bfed0 | 2160 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
0f79fd6f | 2161 | nfs4_state_start_reclaim_nograce(clp); |
cc0a9843 TM |
2162 | dprintk("%s: scheduling reset of all state for server %s!\n", |
2163 | __func__, clp->cl_hostname); | |
0400a6b0 | 2164 | nfs4_schedule_state_manager(clp); |
0f79fd6f TM |
2165 | } |
2166 | } | |
2167 | ||
2168 | static void nfs41_handle_server_reboot(struct nfs_client *clp) | |
2169 | { | |
2170 | if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) == 0) { | |
2171 | nfs4_state_start_reclaim_reboot(clp); | |
cc0a9843 TM |
2172 | dprintk("%s: server %s rebooted!\n", __func__, |
2173 | clp->cl_hostname); | |
0400a6b0 | 2174 | nfs4_schedule_state_manager(clp); |
0f79fd6f TM |
2175 | } |
2176 | } | |
2177 | ||
2178 | static void nfs41_handle_state_revoked(struct nfs_client *clp) | |
2179 | { | |
0f79fd6f | 2180 | nfs4_reset_all_state(clp); |
cc0a9843 | 2181 | dprintk("%s: state revoked on server %s\n", __func__, clp->cl_hostname); |
0f79fd6f TM |
2182 | } |
2183 | ||
2184 | static void nfs41_handle_recallable_state_revoked(struct nfs_client *clp) | |
2185 | { | |
2186 | /* This will need to handle layouts too */ | |
2187 | nfs_expire_all_delegations(clp); | |
cc0a9843 TM |
2188 | dprintk("%s: Recallable state revoked on server %s!\n", __func__, |
2189 | clp->cl_hostname); | |
0f79fd6f TM |
2190 | } |
2191 | ||
a9e64442 | 2192 | static void nfs41_handle_backchannel_fault(struct nfs_client *clp) |
0f79fd6f TM |
2193 | { |
2194 | nfs_expire_all_delegations(clp); | |
2195 | if (test_and_set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state) == 0) | |
0400a6b0 | 2196 | nfs4_schedule_state_manager(clp); |
cc0a9843 TM |
2197 | dprintk("%s: server %s declared a backchannel fault\n", __func__, |
2198 | clp->cl_hostname); | |
0f79fd6f TM |
2199 | } |
2200 | ||
a9e64442 WAA |
2201 | static void nfs41_handle_cb_path_down(struct nfs_client *clp) |
2202 | { | |
2203 | if (test_and_set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, | |
2204 | &clp->cl_state) == 0) | |
2205 | nfs4_schedule_state_manager(clp); | |
2206 | } | |
2207 | ||
0629e370 AB |
2208 | void nfs41_handle_sequence_flag_errors(struct nfs_client *clp, u32 flags) |
2209 | { | |
2210 | if (!flags) | |
2211 | return; | |
2c820d9a CL |
2212 | |
2213 | dprintk("%s: \"%s\" (client ID %llx) flags=0x%08x\n", | |
2214 | __func__, clp->cl_hostname, clp->cl_clientid, flags); | |
2215 | ||
111d489f | 2216 | if (flags & SEQ4_STATUS_RESTART_RECLAIM_NEEDED) |
0f79fd6f | 2217 | nfs41_handle_server_reboot(clp); |
111d489f | 2218 | if (flags & (SEQ4_STATUS_EXPIRED_ALL_STATE_REVOKED | |
0629e370 | 2219 | SEQ4_STATUS_EXPIRED_SOME_STATE_REVOKED | |
d1c2331e | 2220 | SEQ4_STATUS_ADMIN_STATE_REVOKED)) |
0f79fd6f | 2221 | nfs41_handle_state_revoked(clp); |
d1c2331e CL |
2222 | if (flags & SEQ4_STATUS_LEASE_MOVED) |
2223 | nfs4_schedule_lease_moved_recovery(clp); | |
111d489f | 2224 | if (flags & SEQ4_STATUS_RECALLABLE_STATE_REVOKED) |
0f79fd6f | 2225 | nfs41_handle_recallable_state_revoked(clp); |
a9e64442 WAA |
2226 | if (flags & SEQ4_STATUS_BACKCHANNEL_FAULT) |
2227 | nfs41_handle_backchannel_fault(clp); | |
2228 | else if (flags & (SEQ4_STATUS_CB_PATH_DOWN | | |
2229 | SEQ4_STATUS_CB_PATH_DOWN_SESSION)) | |
0f79fd6f | 2230 | nfs41_handle_cb_path_down(clp); |
0629e370 AB |
2231 | } |
2232 | ||
c3fad1b1 AA |
2233 | static int nfs4_reset_session(struct nfs_client *clp) |
2234 | { | |
848f5bda | 2235 | struct rpc_cred *cred; |
c3fad1b1 AA |
2236 | int status; |
2237 | ||
1a47e7a6 TM |
2238 | if (!nfs4_has_session(clp)) |
2239 | return 0; | |
38045412 | 2240 | nfs4_begin_drain_session(clp); |
73d8bde5 | 2241 | cred = nfs4_get_clid_cred(clp); |
848f5bda | 2242 | status = nfs4_proc_destroy_session(clp->cl_session, cred); |
c489ee29 TM |
2243 | switch (status) { |
2244 | case 0: | |
2245 | case -NFS4ERR_BADSESSION: | |
2246 | case -NFS4ERR_DEADSESSION: | |
2247 | break; | |
2248 | case -NFS4ERR_BACK_CHAN_BUSY: | |
2249 | case -NFS4ERR_DELAY: | |
2250 | set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); | |
2251 | status = 0; | |
2252 | ssleep(1); | |
2253 | goto out; | |
2254 | default: | |
f455848a | 2255 | status = nfs4_recovery_handle_error(clp, status); |
c3fad1b1 AA |
2256 | goto out; |
2257 | } | |
2258 | ||
2259 | memset(clp->cl_session->sess_id.data, 0, NFS4_MAX_SESSIONID_LEN); | |
848f5bda | 2260 | status = nfs4_proc_create_session(clp, cred); |
41f54a55 | 2261 | if (status) { |
cc0a9843 TM |
2262 | dprintk("%s: session reset failed with status %d for server %s!\n", |
2263 | __func__, status, clp->cl_hostname); | |
f2c1b510 | 2264 | status = nfs4_handle_reclaim_lease_error(clp, status); |
41f54a55 AA |
2265 | goto out; |
2266 | } | |
bda197f5 | 2267 | nfs41_finish_session_reset(clp); |
cc0a9843 TM |
2268 | dprintk("%s: session reset was successful for server %s!\n", |
2269 | __func__, clp->cl_hostname); | |
41f54a55 | 2270 | out: |
848f5bda TM |
2271 | if (cred) |
2272 | put_rpccred(cred); | |
c3fad1b1 AA |
2273 | return status; |
2274 | } | |
76db6d95 | 2275 | |
a9e64442 WAA |
2276 | static int nfs4_bind_conn_to_session(struct nfs_client *clp) |
2277 | { | |
2cf047c9 TM |
2278 | struct rpc_cred *cred; |
2279 | int ret; | |
2280 | ||
1a47e7a6 TM |
2281 | if (!nfs4_has_session(clp)) |
2282 | return 0; | |
43ac544c | 2283 | nfs4_begin_drain_session(clp); |
73d8bde5 | 2284 | cred = nfs4_get_clid_cred(clp); |
2cf047c9 TM |
2285 | ret = nfs4_proc_bind_conn_to_session(clp, cred); |
2286 | if (cred) | |
2287 | put_rpccred(cred); | |
43ac544c | 2288 | clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); |
bf674c82 TM |
2289 | switch (ret) { |
2290 | case 0: | |
cc0a9843 TM |
2291 | dprintk("%s: bind_conn_to_session was successful for server %s!\n", |
2292 | __func__, clp->cl_hostname); | |
bf674c82 TM |
2293 | break; |
2294 | case -NFS4ERR_DELAY: | |
2295 | ssleep(1); | |
2296 | set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); | |
2297 | break; | |
2298 | default: | |
2299 | return nfs4_recovery_handle_error(clp, ret); | |
2300 | } | |
2301 | return 0; | |
a9e64442 | 2302 | } |
76db6d95 | 2303 | #else /* CONFIG_NFS_V4_1 */ |
c3fad1b1 | 2304 | static int nfs4_reset_session(struct nfs_client *clp) { return 0; } |
a9e64442 WAA |
2305 | |
2306 | static int nfs4_bind_conn_to_session(struct nfs_client *clp) | |
2307 | { | |
2308 | return 0; | |
2309 | } | |
76db6d95 AA |
2310 | #endif /* CONFIG_NFS_V4_1 */ |
2311 | ||
e005e804 | 2312 | static void nfs4_state_manager(struct nfs_client *clp) |
02860014 | 2313 | { |
02860014 | 2314 | int status = 0; |
8ed27d4f | 2315 | const char *section = "", *section_sep = ""; |
02860014 | 2316 | |
02860014 | 2317 | /* Ensure exclusive access to NFSv4 state */ |
47c2199b | 2318 | do { |
2c820d9a | 2319 | if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) { |
8ed27d4f | 2320 | section = "purge state"; |
b42353ff | 2321 | status = nfs4_purge_lease(clp); |
2a6ee6aa TM |
2322 | if (status < 0) |
2323 | goto out_error; | |
b42353ff | 2324 | continue; |
2c820d9a CL |
2325 | } |
2326 | ||
b42353ff | 2327 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) { |
8ed27d4f | 2328 | section = "lease expired"; |
b79a4a1b TM |
2329 | /* We're going to have to re-establish a clientid */ |
2330 | status = nfs4_reclaim_lease(clp); | |
2a6ee6aa | 2331 | if (status < 0) |
b79a4a1b | 2332 | goto out_error; |
b42353ff | 2333 | continue; |
e598d843 TM |
2334 | } |
2335 | ||
c3fad1b1 | 2336 | /* Initialize or reset the session */ |
1a47e7a6 | 2337 | if (test_and_clear_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state)) { |
8ed27d4f | 2338 | section = "reset session"; |
4d643d1d | 2339 | status = nfs4_reset_session(clp); |
b6d408ba TM |
2340 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
2341 | continue; | |
2342 | if (status < 0) | |
76db6d95 | 2343 | goto out_error; |
76db6d95 | 2344 | } |
b6d408ba | 2345 | |
a9e64442 WAA |
2346 | /* Send BIND_CONN_TO_SESSION */ |
2347 | if (test_and_clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION, | |
1a47e7a6 | 2348 | &clp->cl_state)) { |
8ed27d4f | 2349 | section = "bind conn to session"; |
a9e64442 WAA |
2350 | status = nfs4_bind_conn_to_session(clp); |
2351 | if (status < 0) | |
2352 | goto out_error; | |
bf674c82 | 2353 | continue; |
a9e64442 WAA |
2354 | } |
2355 | ||
5df904ae TM |
2356 | if (test_and_clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state)) { |
2357 | section = "check lease"; | |
2358 | status = nfs4_check_lease(clp); | |
2359 | if (status < 0) | |
2360 | goto out_error; | |
8faaa6d5 | 2361 | continue; |
c9fdeb28 CL |
2362 | } |
2363 | ||
2364 | if (test_and_clear_bit(NFS4CLNT_MOVED, &clp->cl_state)) { | |
2365 | section = "migration"; | |
2366 | status = nfs4_handle_migration(clp); | |
2367 | if (status < 0) | |
2368 | goto out_error; | |
5df904ae TM |
2369 | } |
2370 | ||
b7f7a66e CL |
2371 | if (test_and_clear_bit(NFS4CLNT_LEASE_MOVED, &clp->cl_state)) { |
2372 | section = "lease moved"; | |
2373 | status = nfs4_handle_lease_moved(clp); | |
2374 | if (status < 0) | |
2375 | goto out_error; | |
2376 | } | |
2377 | ||
b79a4a1b | 2378 | /* First recover reboot state... */ |
e345e88a | 2379 | if (test_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) { |
8ed27d4f | 2380 | section = "reclaim reboot"; |
591d71cb | 2381 | status = nfs4_do_reclaim(clp, |
c48f4f35 | 2382 | clp->cl_mvops->reboot_recovery_ops); |
df817ba3 | 2383 | if (status == -EAGAIN) |
b6d408ba TM |
2384 | continue; |
2385 | if (status < 0) | |
2386 | goto out_error; | |
df817ba3 | 2387 | nfs4_state_end_reclaim_reboot(clp); |
02860014 TM |
2388 | } |
2389 | ||
b79a4a1b TM |
2390 | /* Now recover expired state... */ |
2391 | if (test_and_clear_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) { | |
8ed27d4f | 2392 | section = "reclaim nograce"; |
591d71cb | 2393 | status = nfs4_do_reclaim(clp, |
c48f4f35 | 2394 | clp->cl_mvops->nograce_recovery_ops); |
df817ba3 | 2395 | if (status == -EAGAIN) |
b6d408ba TM |
2396 | continue; |
2397 | if (status < 0) | |
b79a4a1b | 2398 | goto out_error; |
1da177e4 | 2399 | } |
707fb4b3 | 2400 | |
5601a00d | 2401 | nfs4_end_drain_session(clp); |
707fb4b3 TM |
2402 | if (test_and_clear_bit(NFS4CLNT_DELEGRETURN, &clp->cl_state)) { |
2403 | nfs_client_return_marked_delegations(clp); | |
2404 | continue; | |
2405 | } | |
e005e804 TM |
2406 | |
2407 | nfs4_clear_state_manager_bit(clp); | |
f3c76491 TM |
2408 | /* Did we race with an attempt to give us more work? */ |
2409 | if (clp->cl_state == 0) | |
2410 | break; | |
2411 | if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) != 0) | |
2412 | break; | |
47c2199b | 2413 | } while (atomic_read(&clp->cl_count) > 1); |
e005e804 | 2414 | return; |
1da177e4 | 2415 | out_error: |
8ed27d4f WAA |
2416 | if (strlen(section)) |
2417 | section_sep = ": "; | |
2418 | pr_warn_ratelimited("NFS: state manager%s%s failed on NFSv4 server %s" | |
2419 | " with error %d\n", section_sep, section, | |
2420 | clp->cl_hostname, -status); | |
ffe5a830 | 2421 | ssleep(1); |
5601a00d | 2422 | nfs4_end_drain_session(clp); |
e005e804 TM |
2423 | nfs4_clear_state_manager_bit(clp); |
2424 | } | |
2425 | ||
2426 | static int nfs4_run_state_manager(void *ptr) | |
2427 | { | |
2428 | struct nfs_client *clp = ptr; | |
2429 | ||
2430 | allow_signal(SIGKILL); | |
2431 | nfs4_state_manager(clp); | |
2432 | nfs_put_client(clp); | |
2433 | module_put_and_exit(0); | |
2434 | return 0; | |
1da177e4 LT |
2435 | } |
2436 | ||
2437 | /* | |
2438 | * Local variables: | |
2439 | * c-basic-offset: 8 | |
2440 | * End: | |
2441 | */ |