Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * fs/nfs/nfs4state.c | |
3 | * | |
4 | * Client-side XDR for NFSv4. | |
5 | * | |
6 | * Copyright (c) 2002 The Regents of the University of Michigan. | |
7 | * All rights reserved. | |
8 | * | |
9 | * Kendrick Smith <kmsmith@umich.edu> | |
10 | * | |
11 | * Redistribution and use in source and binary forms, with or without | |
12 | * modification, are permitted provided that the following conditions | |
13 | * are met: | |
14 | * | |
15 | * 1. Redistributions of source code must retain the above copyright | |
16 | * notice, this list of conditions and the following disclaimer. | |
17 | * 2. Redistributions in binary form must reproduce the above copyright | |
18 | * notice, this list of conditions and the following disclaimer in the | |
19 | * documentation and/or other materials provided with the distribution. | |
20 | * 3. Neither the name of the University nor the names of its | |
21 | * contributors may be used to endorse or promote products derived | |
22 | * from this software without specific prior written permission. | |
23 | * | |
24 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
25 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
26 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
27 | * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
28 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
29 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
30 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR | |
31 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
32 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
33 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
34 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
35 | * | |
36 | * Implementation of the NFSv4 state model. For the time being, | |
37 | * this is minimal, but will be made much more complex in a | |
38 | * subsequent patch. | |
39 | */ | |
40 | ||
6f43ddcc | 41 | #include <linux/kernel.h> |
1da177e4 | 42 | #include <linux/slab.h> |
b89f4321 | 43 | #include <linux/fs.h> |
1da177e4 | 44 | #include <linux/nfs_fs.h> |
5043e900 TM |
45 | #include <linux/kthread.h> |
46 | #include <linux/module.h> | |
9f958ab8 | 47 | #include <linux/random.h> |
8c7597f6 | 48 | #include <linux/ratelimit.h> |
1da177e4 LT |
49 | #include <linux/workqueue.h> |
50 | #include <linux/bitops.h> | |
0aaaf5c4 | 51 | #include <linux/jiffies.h> |
1da177e4 | 52 | |
05f4c350 CL |
53 | #include <linux/sunrpc/clnt.h> |
54 | ||
4ce79717 | 55 | #include "nfs4_fs.h" |
1da177e4 LT |
56 | #include "callback.h" |
57 | #include "delegation.h" | |
24c8dbbb | 58 | #include "internal.h" |
40c64c26 | 59 | #include "nfs4idmap.h" |
76e697ba | 60 | #include "nfs4session.h" |
974cec8c | 61 | #include "pnfs.h" |
bbe0a3aa | 62 | #include "netns.h" |
1da177e4 | 63 | |
e3c0fb7e CL |
64 | #define NFSDBG_FACILITY NFSDBG_STATE |
65 | ||
1da177e4 LT |
66 | #define OPENOWNER_POOL_SIZE 8 |
67 | ||
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; | |
349 | ||
48d66b97 TM |
350 | status = nfs41_walk_client_list(clp, result, cred); |
351 | if (status < 0) | |
352 | return status; | |
353 | if (clp != *result) | |
354 | return 0; | |
355 | ||
e11259f9 TM |
356 | /* Purge state if the client id was established in a prior instance */ |
357 | if (clp->cl_exchange_flags & EXCHGID4_FLAG_CONFIRMED_R) | |
358 | set_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state); | |
359 | else | |
360 | set_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); | |
48d66b97 TM |
361 | nfs4_schedule_state_manager(clp); |
362 | status = nfs_wait_client_init_complete(clp); | |
363 | if (status < 0) | |
364 | nfs_put_client(clp); | |
365 | return status; | |
05f4c350 CL |
366 | } |
367 | ||
b4b82607 AA |
368 | #endif /* CONFIG_NFS_V4_1 */ |
369 | ||
24d292b8 | 370 | /** |
73d8bde5 | 371 | * nfs4_get_clid_cred - Acquire credential for a setclientid operation |
24d292b8 CL |
372 | * @clp: client state handle |
373 | * | |
374 | * Returns an rpc_cred with reference count bumped, or NULL. | |
375 | */ | |
73d8bde5 | 376 | struct rpc_cred *nfs4_get_clid_cred(struct nfs_client *clp) |
24d292b8 | 377 | { |
a2b2bb88 | 378 | struct rpc_cred *cred; |
286d7d6a | 379 | |
6dc9d57a TM |
380 | spin_lock(&clp->cl_lock); |
381 | cred = nfs4_get_machine_cred_locked(clp); | |
24d292b8 | 382 | spin_unlock(&clp->cl_lock); |
a2b2bb88 | 383 | return cred; |
286d7d6a TM |
384 | } |
385 | ||
1da177e4 | 386 | static struct nfs4_state_owner * |
24d292b8 | 387 | nfs4_find_state_owner_locked(struct nfs_server *server, struct rpc_cred *cred) |
1da177e4 | 388 | { |
24d292b8 | 389 | struct rb_node **p = &server->state_owners.rb_node, |
9f958ab8 | 390 | *parent = NULL; |
414adf14 | 391 | struct nfs4_state_owner *sp; |
1da177e4 | 392 | |
9f958ab8 TM |
393 | while (*p != NULL) { |
394 | parent = *p; | |
24d292b8 | 395 | sp = rb_entry(parent, struct nfs4_state_owner, so_server_node); |
9f958ab8 TM |
396 | |
397 | if (cred < sp->so_cred) | |
398 | p = &parent->rb_left; | |
399 | else if (cred > sp->so_cred) | |
400 | p = &parent->rb_right; | |
401 | else { | |
0aaaf5c4 CL |
402 | if (!list_empty(&sp->so_lru)) |
403 | list_del_init(&sp->so_lru); | |
9f958ab8 | 404 | atomic_inc(&sp->so_count); |
414adf14 | 405 | return sp; |
9f958ab8 | 406 | } |
1da177e4 | 407 | } |
414adf14 | 408 | return NULL; |
1da177e4 LT |
409 | } |
410 | ||
9f958ab8 | 411 | static struct nfs4_state_owner * |
24d292b8 | 412 | nfs4_insert_state_owner_locked(struct nfs4_state_owner *new) |
9f958ab8 | 413 | { |
24d292b8 CL |
414 | struct nfs_server *server = new->so_server; |
415 | struct rb_node **p = &server->state_owners.rb_node, | |
9f958ab8 TM |
416 | *parent = NULL; |
417 | struct nfs4_state_owner *sp; | |
9157c31d | 418 | int err; |
9f958ab8 TM |
419 | |
420 | while (*p != NULL) { | |
421 | parent = *p; | |
24d292b8 | 422 | sp = rb_entry(parent, struct nfs4_state_owner, so_server_node); |
9f958ab8 TM |
423 | |
424 | if (new->so_cred < sp->so_cred) | |
425 | p = &parent->rb_left; | |
426 | else if (new->so_cred > sp->so_cred) | |
427 | p = &parent->rb_right; | |
428 | else { | |
0aaaf5c4 CL |
429 | if (!list_empty(&sp->so_lru)) |
430 | list_del_init(&sp->so_lru); | |
9f958ab8 TM |
431 | atomic_inc(&sp->so_count); |
432 | return sp; | |
433 | } | |
434 | } | |
48c22eb2 | 435 | err = ida_get_new(&server->openowner_id, &new->so_seqid.owner_id); |
9157c31d TM |
436 | if (err) |
437 | return ERR_PTR(err); | |
24d292b8 CL |
438 | rb_link_node(&new->so_server_node, parent, p); |
439 | rb_insert_color(&new->so_server_node, &server->state_owners); | |
9f958ab8 TM |
440 | return new; |
441 | } | |
442 | ||
443 | static void | |
24d292b8 | 444 | nfs4_remove_state_owner_locked(struct nfs4_state_owner *sp) |
9f958ab8 | 445 | { |
24d292b8 CL |
446 | struct nfs_server *server = sp->so_server; |
447 | ||
448 | if (!RB_EMPTY_NODE(&sp->so_server_node)) | |
449 | rb_erase(&sp->so_server_node, &server->state_owners); | |
48c22eb2 | 450 | ida_remove(&server->openowner_id, sp->so_seqid.owner_id); |
9f958ab8 TM |
451 | } |
452 | ||
7ba127ab TM |
453 | static void |
454 | nfs4_init_seqid_counter(struct nfs_seqid_counter *sc) | |
455 | { | |
95b72eb0 | 456 | sc->create_time = ktime_get(); |
7ba127ab TM |
457 | sc->flags = 0; |
458 | sc->counter = 0; | |
459 | spin_lock_init(&sc->lock); | |
460 | INIT_LIST_HEAD(&sc->list); | |
461 | rpc_init_wait_queue(&sc->wait, "Seqid_waitqueue"); | |
462 | } | |
463 | ||
464 | static void | |
465 | nfs4_destroy_seqid_counter(struct nfs_seqid_counter *sc) | |
466 | { | |
467 | rpc_destroy_wait_queue(&sc->wait); | |
468 | } | |
469 | ||
1da177e4 LT |
470 | /* |
471 | * nfs4_alloc_state_owner(): this is called on the OPEN or CREATE path to | |
472 | * create a new state_owner. | |
473 | * | |
474 | */ | |
475 | static struct nfs4_state_owner * | |
d1e284d5 TM |
476 | nfs4_alloc_state_owner(struct nfs_server *server, |
477 | struct rpc_cred *cred, | |
478 | gfp_t gfp_flags) | |
1da177e4 LT |
479 | { |
480 | struct nfs4_state_owner *sp; | |
481 | ||
d1e284d5 | 482 | sp = kzalloc(sizeof(*sp), gfp_flags); |
1da177e4 LT |
483 | if (!sp) |
484 | return NULL; | |
d1e284d5 TM |
485 | sp->so_server = server; |
486 | sp->so_cred = get_rpccred(cred); | |
ec073428 | 487 | spin_lock_init(&sp->so_lock); |
1da177e4 | 488 | INIT_LIST_HEAD(&sp->so_states); |
7ba127ab | 489 | nfs4_init_seqid_counter(&sp->so_seqid); |
1da177e4 | 490 | atomic_set(&sp->so_count, 1); |
0aaaf5c4 | 491 | INIT_LIST_HEAD(&sp->so_lru); |
c137afab | 492 | seqcount_init(&sp->so_reclaim_seqcount); |
65b62a29 | 493 | mutex_init(&sp->so_delegreturn_mutex); |
1da177e4 LT |
494 | return sp; |
495 | } | |
496 | ||
1d2e88e7 | 497 | static void |
1da177e4 LT |
498 | nfs4_drop_state_owner(struct nfs4_state_owner *sp) |
499 | { | |
c77365c9 TM |
500 | struct rb_node *rb_node = &sp->so_server_node; |
501 | ||
502 | if (!RB_EMPTY_NODE(rb_node)) { | |
24d292b8 CL |
503 | struct nfs_server *server = sp->so_server; |
504 | struct nfs_client *clp = server->nfs_client; | |
9f958ab8 TM |
505 | |
506 | spin_lock(&clp->cl_lock); | |
c77365c9 TM |
507 | if (!RB_EMPTY_NODE(rb_node)) { |
508 | rb_erase(rb_node, &server->state_owners); | |
509 | RB_CLEAR_NODE(rb_node); | |
510 | } | |
9f958ab8 TM |
511 | spin_unlock(&clp->cl_lock); |
512 | } | |
1da177e4 LT |
513 | } |
514 | ||
0aaaf5c4 CL |
515 | static void nfs4_free_state_owner(struct nfs4_state_owner *sp) |
516 | { | |
7ba127ab | 517 | nfs4_destroy_seqid_counter(&sp->so_seqid); |
0aaaf5c4 CL |
518 | put_rpccred(sp->so_cred); |
519 | kfree(sp); | |
520 | } | |
521 | ||
522 | static void nfs4_gc_state_owners(struct nfs_server *server) | |
523 | { | |
524 | struct nfs_client *clp = server->nfs_client; | |
525 | struct nfs4_state_owner *sp, *tmp; | |
526 | unsigned long time_min, time_max; | |
527 | LIST_HEAD(doomed); | |
528 | ||
529 | spin_lock(&clp->cl_lock); | |
530 | time_max = jiffies; | |
531 | time_min = (long)time_max - (long)clp->cl_lease_time; | |
532 | list_for_each_entry_safe(sp, tmp, &server->state_owners_lru, so_lru) { | |
533 | /* NB: LRU is sorted so that oldest is at the head */ | |
534 | if (time_in_range(sp->so_expires, time_min, time_max)) | |
535 | break; | |
536 | list_move(&sp->so_lru, &doomed); | |
537 | nfs4_remove_state_owner_locked(sp); | |
538 | } | |
539 | spin_unlock(&clp->cl_lock); | |
540 | ||
541 | list_for_each_entry_safe(sp, tmp, &doomed, so_lru) { | |
542 | list_del(&sp->so_lru); | |
543 | nfs4_free_state_owner(sp); | |
544 | } | |
545 | } | |
546 | ||
24d292b8 CL |
547 | /** |
548 | * nfs4_get_state_owner - Look up a state owner given a credential | |
549 | * @server: nfs_server to search | |
550 | * @cred: RPC credential to match | |
551 | * | |
552 | * Returns a pointer to an instantiated nfs4_state_owner struct, or NULL. | |
553 | */ | |
554 | struct nfs4_state_owner *nfs4_get_state_owner(struct nfs_server *server, | |
d1e284d5 TM |
555 | struct rpc_cred *cred, |
556 | gfp_t gfp_flags) | |
1da177e4 | 557 | { |
7539bbab | 558 | struct nfs_client *clp = server->nfs_client; |
1da177e4 LT |
559 | struct nfs4_state_owner *sp, *new; |
560 | ||
1da177e4 | 561 | spin_lock(&clp->cl_lock); |
24d292b8 | 562 | sp = nfs4_find_state_owner_locked(server, cred); |
1da177e4 | 563 | spin_unlock(&clp->cl_lock); |
1da177e4 | 564 | if (sp != NULL) |
0aaaf5c4 | 565 | goto out; |
d1e284d5 | 566 | new = nfs4_alloc_state_owner(server, cred, gfp_flags); |
9f958ab8 | 567 | if (new == NULL) |
0aaaf5c4 | 568 | goto out; |
9157c31d TM |
569 | do { |
570 | if (ida_pre_get(&server->openowner_id, gfp_flags) == 0) | |
571 | break; | |
572 | spin_lock(&clp->cl_lock); | |
573 | sp = nfs4_insert_state_owner_locked(new); | |
574 | spin_unlock(&clp->cl_lock); | |
575 | } while (sp == ERR_PTR(-EAGAIN)); | |
d1e284d5 TM |
576 | if (sp != new) |
577 | nfs4_free_state_owner(new); | |
0aaaf5c4 CL |
578 | out: |
579 | nfs4_gc_state_owners(server); | |
9f958ab8 | 580 | return sp; |
1da177e4 LT |
581 | } |
582 | ||
24d292b8 CL |
583 | /** |
584 | * nfs4_put_state_owner - Release a nfs4_state_owner | |
585 | * @sp: state owner data to release | |
7bf97bc2 TM |
586 | * |
587 | * Note that we keep released state owners on an LRU | |
588 | * list. | |
589 | * This caches valid state owners so that they can be | |
590 | * reused, to avoid the OPEN_CONFIRM on minor version 0. | |
591 | * It also pins the uniquifier of dropped state owners for | |
592 | * a while, to ensure that those state owner names are | |
593 | * never reused. | |
24d292b8 | 594 | */ |
1da177e4 LT |
595 | void nfs4_put_state_owner(struct nfs4_state_owner *sp) |
596 | { | |
0aaaf5c4 CL |
597 | struct nfs_server *server = sp->so_server; |
598 | struct nfs_client *clp = server->nfs_client; | |
1da177e4 LT |
599 | |
600 | if (!atomic_dec_and_lock(&sp->so_count, &clp->cl_lock)) | |
601 | return; | |
0aaaf5c4 | 602 | |
7bf97bc2 TM |
603 | sp->so_expires = jiffies; |
604 | list_add_tail(&sp->so_lru, &server->state_owners_lru); | |
605 | spin_unlock(&clp->cl_lock); | |
0aaaf5c4 CL |
606 | } |
607 | ||
608 | /** | |
609 | * nfs4_purge_state_owners - Release all cached state owners | |
610 | * @server: nfs_server with cached state owners to release | |
611 | * | |
612 | * Called at umount time. Remaining state owners will be on | |
613 | * the LRU with ref count of zero. | |
614 | */ | |
615 | void nfs4_purge_state_owners(struct nfs_server *server) | |
616 | { | |
617 | struct nfs_client *clp = server->nfs_client; | |
618 | struct nfs4_state_owner *sp, *tmp; | |
619 | LIST_HEAD(doomed); | |
620 | ||
621 | spin_lock(&clp->cl_lock); | |
622 | list_for_each_entry_safe(sp, tmp, &server->state_owners_lru, so_lru) { | |
623 | list_move(&sp->so_lru, &doomed); | |
624 | nfs4_remove_state_owner_locked(sp); | |
625 | } | |
1da177e4 | 626 | spin_unlock(&clp->cl_lock); |
0aaaf5c4 CL |
627 | |
628 | list_for_each_entry_safe(sp, tmp, &doomed, so_lru) { | |
629 | list_del(&sp->so_lru); | |
630 | nfs4_free_state_owner(sp); | |
631 | } | |
1da177e4 LT |
632 | } |
633 | ||
634 | static struct nfs4_state * | |
635 | nfs4_alloc_open_state(void) | |
636 | { | |
637 | struct nfs4_state *state; | |
638 | ||
8535b2be | 639 | state = kzalloc(sizeof(*state), GFP_NOFS); |
1da177e4 LT |
640 | if (!state) |
641 | return NULL; | |
1da177e4 LT |
642 | atomic_set(&state->count, 1); |
643 | INIT_LIST_HEAD(&state->lock_states); | |
8d0a8a9d | 644 | spin_lock_init(&state->state_lock); |
8bda4e4c | 645 | seqlock_init(&state->seqlock); |
1da177e4 LT |
646 | return state; |
647 | } | |
648 | ||
4cecb76f | 649 | void |
dc0b027d | 650 | nfs4_state_set_mode_locked(struct nfs4_state *state, fmode_t fmode) |
4cecb76f | 651 | { |
dc0b027d | 652 | if (state->state == fmode) |
4cecb76f TM |
653 | return; |
654 | /* NB! List reordering - see the reclaim code for why. */ | |
dc0b027d TM |
655 | if ((fmode & FMODE_WRITE) != (state->state & FMODE_WRITE)) { |
656 | if (fmode & FMODE_WRITE) | |
4cecb76f TM |
657 | list_move(&state->open_states, &state->owner->so_states); |
658 | else | |
659 | list_move_tail(&state->open_states, &state->owner->so_states); | |
660 | } | |
dc0b027d | 661 | state->state = fmode; |
4cecb76f TM |
662 | } |
663 | ||
1da177e4 LT |
664 | static struct nfs4_state * |
665 | __nfs4_find_state_byowner(struct inode *inode, struct nfs4_state_owner *owner) | |
666 | { | |
667 | struct nfs_inode *nfsi = NFS_I(inode); | |
668 | struct nfs4_state *state; | |
669 | ||
670 | list_for_each_entry(state, &nfsi->open_states, inode_states) { | |
1c816efa | 671 | if (state->owner != owner) |
1da177e4 | 672 | continue; |
5d422301 TM |
673 | if (!nfs4_valid_open_stateid(state)) |
674 | continue; | |
1c816efa | 675 | if (atomic_inc_not_zero(&state->count)) |
1da177e4 | 676 | return state; |
1da177e4 LT |
677 | } |
678 | return NULL; | |
679 | } | |
680 | ||
1da177e4 LT |
681 | static void |
682 | nfs4_free_open_state(struct nfs4_state *state) | |
683 | { | |
684 | kfree(state); | |
685 | } | |
686 | ||
687 | struct nfs4_state * | |
688 | nfs4_get_open_state(struct inode *inode, struct nfs4_state_owner *owner) | |
689 | { | |
690 | struct nfs4_state *state, *new; | |
691 | struct nfs_inode *nfsi = NFS_I(inode); | |
692 | ||
693 | spin_lock(&inode->i_lock); | |
694 | state = __nfs4_find_state_byowner(inode, owner); | |
695 | spin_unlock(&inode->i_lock); | |
696 | if (state) | |
697 | goto out; | |
698 | new = nfs4_alloc_open_state(); | |
ec073428 | 699 | spin_lock(&owner->so_lock); |
1da177e4 LT |
700 | spin_lock(&inode->i_lock); |
701 | state = __nfs4_find_state_byowner(inode, owner); | |
702 | if (state == NULL && new != NULL) { | |
703 | state = new; | |
1da177e4 LT |
704 | state->owner = owner; |
705 | atomic_inc(&owner->so_count); | |
706 | list_add(&state->inode_states, &nfsi->open_states); | |
0444d76a DC |
707 | ihold(inode); |
708 | state->inode = inode; | |
1da177e4 | 709 | spin_unlock(&inode->i_lock); |
ec073428 TM |
710 | /* Note: The reclaim code dictates that we add stateless |
711 | * and read-only stateids to the end of the list */ | |
712 | list_add_tail(&state->open_states, &owner->so_states); | |
713 | spin_unlock(&owner->so_lock); | |
1da177e4 LT |
714 | } else { |
715 | spin_unlock(&inode->i_lock); | |
ec073428 | 716 | spin_unlock(&owner->so_lock); |
1da177e4 LT |
717 | if (new) |
718 | nfs4_free_open_state(new); | |
719 | } | |
720 | out: | |
721 | return state; | |
722 | } | |
723 | ||
1da177e4 LT |
724 | void nfs4_put_open_state(struct nfs4_state *state) |
725 | { | |
726 | struct inode *inode = state->inode; | |
727 | struct nfs4_state_owner *owner = state->owner; | |
728 | ||
ec073428 | 729 | if (!atomic_dec_and_lock(&state->count, &owner->so_lock)) |
1da177e4 | 730 | return; |
ec073428 | 731 | spin_lock(&inode->i_lock); |
ba683031 | 732 | list_del(&state->inode_states); |
1da177e4 | 733 | list_del(&state->open_states); |
ec073428 TM |
734 | spin_unlock(&inode->i_lock); |
735 | spin_unlock(&owner->so_lock); | |
1da177e4 | 736 | iput(inode); |
1da177e4 LT |
737 | nfs4_free_open_state(state); |
738 | nfs4_put_state_owner(owner); | |
739 | } | |
740 | ||
741 | /* | |
83c9d41e | 742 | * Close the current file. |
1da177e4 | 743 | */ |
643168c2 | 744 | static void __nfs4_close(struct nfs4_state *state, |
8535b2be | 745 | fmode_t fmode, gfp_t gfp_mask, int wait) |
1da177e4 | 746 | { |
1da177e4 | 747 | struct nfs4_state_owner *owner = state->owner; |
003707c7 | 748 | int call_close = 0; |
dc0b027d | 749 | fmode_t newstate; |
1da177e4 LT |
750 | |
751 | atomic_inc(&owner->so_count); | |
1da177e4 | 752 | /* Protect against nfs4_find_state() */ |
ec073428 | 753 | spin_lock(&owner->so_lock); |
dc0b027d | 754 | switch (fmode & (FMODE_READ | FMODE_WRITE)) { |
e7616923 TM |
755 | case FMODE_READ: |
756 | state->n_rdonly--; | |
757 | break; | |
758 | case FMODE_WRITE: | |
759 | state->n_wronly--; | |
760 | break; | |
761 | case FMODE_READ|FMODE_WRITE: | |
762 | state->n_rdwr--; | |
763 | } | |
003707c7 | 764 | newstate = FMODE_READ|FMODE_WRITE; |
e7616923 | 765 | if (state->n_rdwr == 0) { |
003707c7 | 766 | if (state->n_rdonly == 0) { |
e7616923 | 767 | newstate &= ~FMODE_READ; |
003707c7 TM |
768 | call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags); |
769 | call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); | |
770 | } | |
771 | if (state->n_wronly == 0) { | |
e7616923 | 772 | newstate &= ~FMODE_WRITE; |
003707c7 TM |
773 | call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags); |
774 | call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); | |
775 | } | |
776 | if (newstate == 0) | |
777 | clear_bit(NFS_DELEGATED_STATE, &state->flags); | |
e7616923 | 778 | } |
003707c7 | 779 | nfs4_state_set_mode_locked(state, newstate); |
ec073428 | 780 | spin_unlock(&owner->so_lock); |
4cecb76f | 781 | |
003707c7 | 782 | if (!call_close) { |
b39e625b TM |
783 | nfs4_put_open_state(state); |
784 | nfs4_put_state_owner(owner); | |
1f7977c1 TM |
785 | } else |
786 | nfs4_do_close(state, gfp_mask, wait); | |
a49c3c77 TM |
787 | } |
788 | ||
643168c2 | 789 | void nfs4_close_state(struct nfs4_state *state, fmode_t fmode) |
a49c3c77 | 790 | { |
643168c2 | 791 | __nfs4_close(state, fmode, GFP_NOFS, 0); |
a49c3c77 TM |
792 | } |
793 | ||
643168c2 | 794 | void nfs4_close_sync(struct nfs4_state *state, fmode_t fmode) |
a49c3c77 | 795 | { |
643168c2 | 796 | __nfs4_close(state, fmode, GFP_KERNEL, 1); |
1da177e4 LT |
797 | } |
798 | ||
799 | /* | |
800 | * Search the state->lock_states for an existing lock_owner | |
801 | * that is compatible with current->files | |
802 | */ | |
803 | static struct nfs4_lock_state * | |
8003d3c4 | 804 | __nfs4_find_lock_state(struct nfs4_state *state, fl_owner_t fl_owner) |
1da177e4 LT |
805 | { |
806 | struct nfs4_lock_state *pos; | |
807 | list_for_each_entry(pos, &state->lock_states, ls_locks) { | |
8003d3c4 | 808 | if (pos->ls_owner != fl_owner) |
1da177e4 LT |
809 | continue; |
810 | atomic_inc(&pos->ls_count); | |
811 | return pos; | |
812 | } | |
813 | return NULL; | |
814 | } | |
815 | ||
1da177e4 LT |
816 | /* |
817 | * Return a compatible lock_state. If no initialized lock_state structure | |
818 | * exists, return an uninitialized one. | |
819 | * | |
1da177e4 | 820 | */ |
8003d3c4 | 821 | static struct nfs4_lock_state *nfs4_alloc_lock_state(struct nfs4_state *state, fl_owner_t fl_owner) |
1da177e4 LT |
822 | { |
823 | struct nfs4_lock_state *lsp; | |
24d292b8 | 824 | struct nfs_server *server = state->owner->so_server; |
1da177e4 | 825 | |
8535b2be | 826 | lsp = kzalloc(sizeof(*lsp), GFP_NOFS); |
1da177e4 LT |
827 | if (lsp == NULL) |
828 | return NULL; | |
7ba127ab | 829 | nfs4_init_seqid_counter(&lsp->ls_seqid); |
1da177e4 | 830 | atomic_set(&lsp->ls_count, 1); |
b64aec8d | 831 | lsp->ls_state = state; |
8003d3c4 | 832 | lsp->ls_owner = fl_owner; |
48c22eb2 TM |
833 | lsp->ls_seqid.owner_id = ida_simple_get(&server->lockowner_id, 0, 0, GFP_NOFS); |
834 | if (lsp->ls_seqid.owner_id < 0) | |
d2d7ce28 | 835 | goto out_free; |
8d0a8a9d | 836 | INIT_LIST_HEAD(&lsp->ls_locks); |
1da177e4 | 837 | return lsp; |
d2d7ce28 TM |
838 | out_free: |
839 | kfree(lsp); | |
840 | return NULL; | |
1da177e4 LT |
841 | } |
842 | ||
5ae67c4f | 843 | void nfs4_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp) |
9f958ab8 | 844 | { |
48c22eb2 | 845 | ida_simple_remove(&server->lockowner_id, lsp->ls_seqid.owner_id); |
7ba127ab | 846 | nfs4_destroy_seqid_counter(&lsp->ls_seqid); |
9f958ab8 TM |
847 | kfree(lsp); |
848 | } | |
849 | ||
1da177e4 LT |
850 | /* |
851 | * Return a compatible lock_state. If no initialized lock_state structure | |
852 | * exists, return an uninitialized one. | |
853 | * | |
1da177e4 | 854 | */ |
8003d3c4 | 855 | static struct nfs4_lock_state *nfs4_get_lock_state(struct nfs4_state *state, fl_owner_t owner) |
1da177e4 | 856 | { |
8d0a8a9d | 857 | struct nfs4_lock_state *lsp, *new = NULL; |
1da177e4 | 858 | |
8d0a8a9d TM |
859 | for(;;) { |
860 | spin_lock(&state->state_lock); | |
8003d3c4 | 861 | lsp = __nfs4_find_lock_state(state, owner); |
8d0a8a9d TM |
862 | if (lsp != NULL) |
863 | break; | |
864 | if (new != NULL) { | |
8d0a8a9d TM |
865 | list_add(&new->ls_locks, &state->lock_states); |
866 | set_bit(LK_STATE_IN_USE, &state->flags); | |
867 | lsp = new; | |
868 | new = NULL; | |
869 | break; | |
870 | } | |
871 | spin_unlock(&state->state_lock); | |
8003d3c4 | 872 | new = nfs4_alloc_lock_state(state, owner); |
8d0a8a9d TM |
873 | if (new == NULL) |
874 | return NULL; | |
875 | } | |
876 | spin_unlock(&state->state_lock); | |
9f958ab8 | 877 | if (new != NULL) |
5ae67c4f | 878 | nfs4_free_lock_state(state->owner->so_server, new); |
1da177e4 LT |
879 | return lsp; |
880 | } | |
881 | ||
882 | /* | |
8d0a8a9d TM |
883 | * Release reference to lock_state, and free it if we see that |
884 | * it is no longer in use | |
1da177e4 | 885 | */ |
faf5f49c | 886 | void nfs4_put_lock_state(struct nfs4_lock_state *lsp) |
1da177e4 | 887 | { |
c8b2d0bf | 888 | struct nfs_server *server; |
8d0a8a9d | 889 | struct nfs4_state *state; |
1da177e4 | 890 | |
8d0a8a9d TM |
891 | if (lsp == NULL) |
892 | return; | |
893 | state = lsp->ls_state; | |
894 | if (!atomic_dec_and_lock(&lsp->ls_count, &state->state_lock)) | |
895 | return; | |
896 | list_del(&lsp->ls_locks); | |
897 | if (list_empty(&state->lock_states)) | |
898 | clear_bit(LK_STATE_IN_USE, &state->flags); | |
899 | spin_unlock(&state->state_lock); | |
0c0e0d3c JL |
900 | server = state->owner->so_server; |
901 | if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) { | |
902 | struct nfs_client *clp = server->nfs_client; | |
903 | ||
904 | clp->cl_mvops->free_lock_state(server, lsp); | |
905 | } else | |
c8b2d0bf | 906 | nfs4_free_lock_state(server, lsp); |
1da177e4 LT |
907 | } |
908 | ||
8d0a8a9d | 909 | static void nfs4_fl_copy_lock(struct file_lock *dst, struct file_lock *src) |
1da177e4 | 910 | { |
8d0a8a9d | 911 | struct nfs4_lock_state *lsp = src->fl_u.nfs4_fl.owner; |
1da177e4 | 912 | |
8d0a8a9d TM |
913 | dst->fl_u.nfs4_fl.owner = lsp; |
914 | atomic_inc(&lsp->ls_count); | |
915 | } | |
1da177e4 | 916 | |
8d0a8a9d | 917 | static void nfs4_fl_release_lock(struct file_lock *fl) |
1da177e4 | 918 | { |
8d0a8a9d | 919 | nfs4_put_lock_state(fl->fl_u.nfs4_fl.owner); |
1da177e4 LT |
920 | } |
921 | ||
6aed6285 | 922 | static const struct file_lock_operations nfs4_fl_lock_ops = { |
8d0a8a9d TM |
923 | .fl_copy_lock = nfs4_fl_copy_lock, |
924 | .fl_release_private = nfs4_fl_release_lock, | |
925 | }; | |
926 | ||
927 | int nfs4_set_lock_state(struct nfs4_state *state, struct file_lock *fl) | |
1da177e4 | 928 | { |
8d0a8a9d TM |
929 | struct nfs4_lock_state *lsp; |
930 | ||
931 | if (fl->fl_ops != NULL) | |
932 | return 0; | |
8003d3c4 | 933 | lsp = nfs4_get_lock_state(state, fl->fl_owner); |
8d0a8a9d TM |
934 | if (lsp == NULL) |
935 | return -ENOMEM; | |
936 | fl->fl_u.nfs4_fl.owner = lsp; | |
937 | fl->fl_ops = &nfs4_fl_lock_ops; | |
938 | return 0; | |
1da177e4 LT |
939 | } |
940 | ||
5521abfd TM |
941 | static int nfs4_copy_lock_stateid(nfs4_stateid *dst, |
942 | struct nfs4_state *state, | |
2a369153 | 943 | const struct nfs_lockowner *lockowner) |
1da177e4 | 944 | { |
8d0a8a9d | 945 | struct nfs4_lock_state *lsp; |
2a369153 | 946 | fl_owner_t fl_owner; |
5521abfd | 947 | int ret = -ENOENT; |
1da177e4 | 948 | |
2a369153 TM |
949 | |
950 | if (lockowner == NULL) | |
951 | goto out; | |
952 | ||
8d0a8a9d | 953 | if (test_bit(LK_STATE_IN_USE, &state->flags) == 0) |
4fc8796d | 954 | goto out; |
1da177e4 | 955 | |
2a369153 | 956 | fl_owner = lockowner->l_owner; |
8d0a8a9d | 957 | spin_lock(&state->state_lock); |
8003d3c4 | 958 | lsp = __nfs4_find_lock_state(state, fl_owner); |
ef1820f9 N |
959 | if (lsp && test_bit(NFS_LOCK_LOST, &lsp->ls_flags)) |
960 | ret = -EIO; | |
961 | else if (lsp != NULL && test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0) { | |
f597c537 | 962 | nfs4_stateid_copy(dst, &lsp->ls_stateid); |
5521abfd | 963 | ret = 0; |
4fc8796d | 964 | } |
8d0a8a9d | 965 | spin_unlock(&state->state_lock); |
1da177e4 | 966 | nfs4_put_lock_state(lsp); |
4fc8796d TM |
967 | out: |
968 | return ret; | |
969 | } | |
970 | ||
927864cd | 971 | static void nfs4_copy_open_stateid(nfs4_stateid *dst, struct nfs4_state *state) |
4fc8796d | 972 | { |
92b40e93 | 973 | const nfs4_stateid *src; |
4fc8796d TM |
974 | int seq; |
975 | ||
976 | do { | |
92b40e93 | 977 | src = &zero_stateid; |
4fc8796d | 978 | seq = read_seqbegin(&state->seqlock); |
92b40e93 TM |
979 | if (test_bit(NFS_OPEN_STATE, &state->flags)) |
980 | src = &state->open_stateid; | |
981 | nfs4_stateid_copy(dst, src); | |
4fc8796d TM |
982 | } while (read_seqretry(&state->seqlock, seq)); |
983 | } | |
984 | ||
985 | /* | |
986 | * Byte-range lock aware utility to initialize the stateid of read/write | |
987 | * requests. | |
988 | */ | |
5521abfd | 989 | int nfs4_select_rw_stateid(nfs4_stateid *dst, struct nfs4_state *state, |
2a369153 | 990 | fmode_t fmode, const struct nfs_lockowner *lockowner) |
4fc8796d | 991 | { |
ef1820f9 N |
992 | int ret = nfs4_copy_lock_stateid(dst, state, lockowner); |
993 | if (ret == -EIO) | |
994 | /* A lost lock - don't even consider delegations */ | |
995 | goto out; | |
146d70ca AA |
996 | /* returns true if delegation stateid found and copied */ |
997 | if (nfs4_copy_delegation_stateid(dst, state->inode, fmode)) { | |
998 | ret = 0; | |
5521abfd | 999 | goto out; |
146d70ca | 1000 | } |
5521abfd | 1001 | if (ret != -ENOENT) |
ef1820f9 N |
1002 | /* nfs4_copy_delegation_stateid() didn't over-write |
1003 | * dst, so it still has the lock stateid which we now | |
1004 | * choose to use. | |
1005 | */ | |
5521abfd | 1006 | goto out; |
927864cd TM |
1007 | nfs4_copy_open_stateid(dst, state); |
1008 | ret = 0; | |
5521abfd | 1009 | out: |
3b66486c TM |
1010 | if (nfs_server_capable(state->inode, NFS_CAP_STATEID_NFSV41)) |
1011 | dst->seqid = 0; | |
5521abfd | 1012 | return ret; |
1da177e4 LT |
1013 | } |
1014 | ||
8535b2be | 1015 | struct nfs_seqid *nfs_alloc_seqid(struct nfs_seqid_counter *counter, gfp_t gfp_mask) |
cee54fc9 | 1016 | { |
cee54fc9 TM |
1017 | struct nfs_seqid *new; |
1018 | ||
8535b2be | 1019 | new = kmalloc(sizeof(*new), gfp_mask); |
badc76dd TM |
1020 | if (new == NULL) |
1021 | return ERR_PTR(-ENOMEM); | |
1022 | new->sequence = counter; | |
1023 | INIT_LIST_HEAD(&new->list); | |
1024 | new->task = NULL; | |
cee54fc9 TM |
1025 | return new; |
1026 | } | |
1027 | ||
72211dbe | 1028 | void nfs_release_seqid(struct nfs_seqid *seqid) |
1da177e4 | 1029 | { |
4601df20 | 1030 | struct nfs_seqid_counter *sequence; |
cee54fc9 | 1031 | |
a6796419 | 1032 | if (seqid == NULL || list_empty(&seqid->list)) |
4601df20 TM |
1033 | return; |
1034 | sequence = seqid->sequence; | |
1035 | spin_lock(&sequence->lock); | |
1036 | list_del_init(&seqid->list); | |
1037 | if (!list_empty(&sequence->list)) { | |
1038 | struct nfs_seqid *next; | |
1039 | ||
1040 | next = list_first_entry(&sequence->list, | |
1041 | struct nfs_seqid, list); | |
1042 | rpc_wake_up_queued_task(&sequence->wait, next->task); | |
2f74c0a0 | 1043 | } |
4601df20 | 1044 | spin_unlock(&sequence->lock); |
72211dbe TM |
1045 | } |
1046 | ||
1047 | void nfs_free_seqid(struct nfs_seqid *seqid) | |
1048 | { | |
1049 | nfs_release_seqid(seqid); | |
cee54fc9 | 1050 | kfree(seqid); |
1da177e4 LT |
1051 | } |
1052 | ||
1053 | /* | |
cee54fc9 TM |
1054 | * Increment the seqid if the OPEN/OPEN_DOWNGRADE/CLOSE succeeded, or |
1055 | * failed with a seqid incrementing error - | |
16a6ddc7 | 1056 | * see comments nfs4.h:seqid_mutating_error() |
cee54fc9 | 1057 | */ |
88d90939 | 1058 | static void nfs_increment_seqid(int status, struct nfs_seqid *seqid) |
cee54fc9 TM |
1059 | { |
1060 | switch (status) { | |
1061 | case 0: | |
1062 | break; | |
1063 | case -NFS4ERR_BAD_SEQID: | |
6f43ddcc TM |
1064 | if (seqid->sequence->flags & NFS_SEQID_CONFIRMED) |
1065 | return; | |
9a3ba432 | 1066 | pr_warn_ratelimited("NFS: v4 server returned a bad" |
497799e7 DM |
1067 | " sequence-id error on an" |
1068 | " unconfirmed sequence %p!\n", | |
6f43ddcc | 1069 | seqid->sequence); |
cee54fc9 TM |
1070 | case -NFS4ERR_STALE_CLIENTID: |
1071 | case -NFS4ERR_STALE_STATEID: | |
1072 | case -NFS4ERR_BAD_STATEID: | |
1073 | case -NFS4ERR_BADXDR: | |
1074 | case -NFS4ERR_RESOURCE: | |
1075 | case -NFS4ERR_NOFILEHANDLE: | |
1076 | /* Non-seqid mutating errors */ | |
1077 | return; | |
1078 | }; | |
1079 | /* | |
1080 | * Note: no locking needed as we are guaranteed to be first | |
1081 | * on the sequence list | |
1082 | */ | |
1083 | seqid->sequence->counter++; | |
1084 | } | |
1085 | ||
1086 | void nfs_increment_open_seqid(int status, struct nfs_seqid *seqid) | |
1087 | { | |
a6796419 TM |
1088 | struct nfs4_state_owner *sp; |
1089 | ||
1090 | if (seqid == NULL) | |
1091 | return; | |
34dc1ad7 | 1092 | |
a6796419 | 1093 | sp = container_of(seqid->sequence, struct nfs4_state_owner, so_seqid); |
34dc1ad7 | 1094 | if (status == -NFS4ERR_BAD_SEQID) |
1da177e4 | 1095 | nfs4_drop_state_owner(sp); |
a6796419 | 1096 | if (!nfs4_has_session(sp->so_server->nfs_client)) |
34dc1ad7 | 1097 | nfs_increment_seqid(status, seqid); |
cee54fc9 TM |
1098 | } |
1099 | ||
1100 | /* | |
cee54fc9 TM |
1101 | * Increment the seqid if the LOCK/LOCKU succeeded, or |
1102 | * failed with a seqid incrementing error - | |
16a6ddc7 | 1103 | * see comments nfs4.h:seqid_mutating_error() |
cee54fc9 TM |
1104 | */ |
1105 | void nfs_increment_lock_seqid(int status, struct nfs_seqid *seqid) | |
1106 | { | |
a6796419 TM |
1107 | if (seqid != NULL) |
1108 | nfs_increment_seqid(status, seqid); | |
cee54fc9 TM |
1109 | } |
1110 | ||
1111 | int nfs_wait_on_sequence(struct nfs_seqid *seqid, struct rpc_task *task) | |
1112 | { | |
a6796419 | 1113 | struct nfs_seqid_counter *sequence; |
cee54fc9 TM |
1114 | int status = 0; |
1115 | ||
a6796419 TM |
1116 | if (seqid == NULL) |
1117 | goto out; | |
1118 | sequence = seqid->sequence; | |
cee54fc9 | 1119 | spin_lock(&sequence->lock); |
4601df20 | 1120 | seqid->task = task; |
2f74c0a0 TM |
1121 | if (list_empty(&seqid->list)) |
1122 | list_add_tail(&seqid->list, &sequence->list); | |
1123 | if (list_first_entry(&sequence->list, struct nfs_seqid, list) == seqid) | |
1124 | goto unlock; | |
5d00837b | 1125 | rpc_sleep_on(&sequence->wait, task, NULL); |
2f74c0a0 TM |
1126 | status = -EAGAIN; |
1127 | unlock: | |
cee54fc9 | 1128 | spin_unlock(&sequence->lock); |
a6796419 | 1129 | out: |
cee54fc9 | 1130 | return status; |
1da177e4 LT |
1131 | } |
1132 | ||
e005e804 | 1133 | static int nfs4_run_state_manager(void *); |
1da177e4 | 1134 | |
e005e804 | 1135 | static void nfs4_clear_state_manager_bit(struct nfs_client *clp) |
433fbe4c | 1136 | { |
4e857c58 | 1137 | smp_mb__before_atomic(); |
e005e804 | 1138 | clear_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state); |
4e857c58 | 1139 | smp_mb__after_atomic(); |
e005e804 | 1140 | wake_up_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING); |
433fbe4c TM |
1141 | rpc_wake_up(&clp->cl_rpcwaitq); |
1142 | } | |
1143 | ||
1da177e4 | 1144 | /* |
e005e804 | 1145 | * Schedule the nfs_client asynchronous state management routine |
1da177e4 | 1146 | */ |
b0d3ded1 | 1147 | void nfs4_schedule_state_manager(struct nfs_client *clp) |
1da177e4 | 1148 | { |
5043e900 | 1149 | struct task_struct *task; |
2446ab60 | 1150 | char buf[INET6_ADDRSTRLEN + sizeof("-manager") + 1]; |
1da177e4 | 1151 | |
e005e804 TM |
1152 | if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) != 0) |
1153 | return; | |
5043e900 TM |
1154 | __module_get(THIS_MODULE); |
1155 | atomic_inc(&clp->cl_count); | |
2446ab60 TM |
1156 | |
1157 | /* The rcu_read_lock() is not strictly necessary, as the state | |
1158 | * manager is the only thread that ever changes the rpc_xprt | |
1159 | * after it's initialized. At this point, we're single threaded. */ | |
1160 | rcu_read_lock(); | |
1161 | snprintf(buf, sizeof(buf), "%s-manager", | |
1162 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)); | |
1163 | rcu_read_unlock(); | |
f170168b | 1164 | task = kthread_run(nfs4_run_state_manager, clp, "%s", buf); |
2446ab60 TM |
1165 | if (IS_ERR(task)) { |
1166 | printk(KERN_ERR "%s: kthread_run: %ld\n", | |
1167 | __func__, PTR_ERR(task)); | |
1168 | nfs4_clear_state_manager_bit(clp); | |
1169 | nfs_put_client(clp); | |
1170 | module_put(THIS_MODULE); | |
1171 | } | |
1da177e4 LT |
1172 | } |
1173 | ||
1174 | /* | |
0400a6b0 | 1175 | * Schedule a lease recovery attempt |
1da177e4 | 1176 | */ |
0400a6b0 | 1177 | void nfs4_schedule_lease_recovery(struct nfs_client *clp) |
1da177e4 LT |
1178 | { |
1179 | if (!clp) | |
1180 | return; | |
e598d843 TM |
1181 | if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
1182 | set_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); | |
cc0a9843 TM |
1183 | dprintk("%s: scheduling lease recovery for server %s\n", __func__, |
1184 | clp->cl_hostname); | |
e005e804 | 1185 | nfs4_schedule_state_manager(clp); |
1da177e4 | 1186 | } |
9cb81968 | 1187 | EXPORT_SYMBOL_GPL(nfs4_schedule_lease_recovery); |
1da177e4 | 1188 | |
c9fdeb28 CL |
1189 | /** |
1190 | * nfs4_schedule_migration_recovery - trigger migration recovery | |
1191 | * | |
1192 | * @server: FSID that is migrating | |
1193 | * | |
1194 | * Returns zero if recovery has started, otherwise a negative NFS4ERR | |
1195 | * value is returned. | |
1196 | */ | |
1197 | int nfs4_schedule_migration_recovery(const struct nfs_server *server) | |
1198 | { | |
1199 | struct nfs_client *clp = server->nfs_client; | |
1200 | ||
1201 | if (server->fh_expire_type != NFS4_FH_PERSISTENT) { | |
1202 | pr_err("NFS: volatile file handles not supported (server %s)\n", | |
1203 | clp->cl_hostname); | |
1204 | return -NFS4ERR_IO; | |
1205 | } | |
1206 | ||
1207 | if (test_bit(NFS_MIG_FAILED, &server->mig_status)) | |
1208 | return -NFS4ERR_IO; | |
1209 | ||
1210 | dprintk("%s: scheduling migration recovery for (%llx:%llx) on %s\n", | |
1211 | __func__, | |
1212 | (unsigned long long)server->fsid.major, | |
1213 | (unsigned long long)server->fsid.minor, | |
1214 | clp->cl_hostname); | |
1215 | ||
1216 | set_bit(NFS_MIG_IN_TRANSITION, | |
1217 | &((struct nfs_server *)server)->mig_status); | |
1218 | set_bit(NFS4CLNT_MOVED, &clp->cl_state); | |
1219 | ||
1220 | nfs4_schedule_state_manager(clp); | |
1221 | return 0; | |
1222 | } | |
1223 | EXPORT_SYMBOL_GPL(nfs4_schedule_migration_recovery); | |
1224 | ||
b7f7a66e CL |
1225 | /** |
1226 | * nfs4_schedule_lease_moved_recovery - start lease-moved recovery | |
1227 | * | |
1228 | * @clp: server to check for moved leases | |
1229 | * | |
1230 | */ | |
1231 | void nfs4_schedule_lease_moved_recovery(struct nfs_client *clp) | |
1232 | { | |
1233 | dprintk("%s: scheduling lease-moved recovery for client ID %llx on %s\n", | |
1234 | __func__, clp->cl_clientid, clp->cl_hostname); | |
1235 | ||
1236 | set_bit(NFS4CLNT_LEASE_MOVED, &clp->cl_state); | |
1237 | nfs4_schedule_state_manager(clp); | |
1238 | } | |
1239 | EXPORT_SYMBOL_GPL(nfs4_schedule_lease_moved_recovery); | |
1240 | ||
33021279 TM |
1241 | int nfs4_wait_clnt_recover(struct nfs_client *clp) |
1242 | { | |
1243 | int res; | |
1244 | ||
1245 | might_sleep(); | |
1246 | ||
0625c2dd | 1247 | atomic_inc(&clp->cl_count); |
74316201 N |
1248 | res = wait_on_bit_action(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING, |
1249 | nfs_wait_bit_killable, TASK_KILLABLE); | |
33021279 | 1250 | if (res) |
0625c2dd | 1251 | goto out; |
33021279 | 1252 | if (clp->cl_cons_state < 0) |
0625c2dd CL |
1253 | res = clp->cl_cons_state; |
1254 | out: | |
1255 | nfs_put_client(clp); | |
1256 | return res; | |
33021279 TM |
1257 | } |
1258 | ||
1259 | int nfs4_client_recover_expired_lease(struct nfs_client *clp) | |
1260 | { | |
1261 | unsigned int loop; | |
1262 | int ret; | |
1263 | ||
1264 | for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) { | |
1265 | ret = nfs4_wait_clnt_recover(clp); | |
1266 | if (ret != 0) | |
1267 | break; | |
1268 | if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) && | |
1269 | !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state)) | |
1270 | break; | |
1271 | nfs4_schedule_state_manager(clp); | |
1272 | ret = -EIO; | |
1273 | } | |
1274 | return ret; | |
1275 | } | |
1276 | ||
ad1e3968 TM |
1277 | /* |
1278 | * nfs40_handle_cb_pathdown - return all delegations after NFS4ERR_CB_PATH_DOWN | |
1279 | * @clp: client to process | |
1280 | * | |
1281 | * Set the NFS4CLNT_LEASE_EXPIRED state in order to force a | |
1282 | * resend of the SETCLIENTID and hence re-establish the | |
1283 | * callback channel. Then return all existing delegations. | |
1284 | */ | |
1285 | static void nfs40_handle_cb_pathdown(struct nfs_client *clp) | |
1286 | { | |
1287 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1288 | nfs_expire_all_delegations(clp); | |
cc0a9843 TM |
1289 | dprintk("%s: handling CB_PATHDOWN recovery for server %s\n", __func__, |
1290 | clp->cl_hostname); | |
ad1e3968 TM |
1291 | } |
1292 | ||
042b60be TM |
1293 | void nfs4_schedule_path_down_recovery(struct nfs_client *clp) |
1294 | { | |
ad1e3968 | 1295 | nfs40_handle_cb_pathdown(clp); |
042b60be TM |
1296 | nfs4_schedule_state_manager(clp); |
1297 | } | |
1298 | ||
f9feab1e | 1299 | static int nfs4_state_mark_reclaim_reboot(struct nfs_client *clp, struct nfs4_state *state) |
b79a4a1b TM |
1300 | { |
1301 | ||
1302 | set_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); | |
1303 | /* Don't recover state that expired before the reboot */ | |
1304 | if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) { | |
1305 | clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); | |
1306 | return 0; | |
1307 | } | |
7eff03ae | 1308 | set_bit(NFS_OWNER_RECLAIM_REBOOT, &state->owner->so_flags); |
b79a4a1b TM |
1309 | set_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state); |
1310 | return 1; | |
1311 | } | |
1312 | ||
4f14c194 | 1313 | int nfs4_state_mark_reclaim_nograce(struct nfs_client *clp, struct nfs4_state *state) |
b79a4a1b TM |
1314 | { |
1315 | set_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags); | |
1316 | clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); | |
7eff03ae | 1317 | set_bit(NFS_OWNER_RECLAIM_NOGRACE, &state->owner->so_flags); |
b79a4a1b TM |
1318 | set_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state); |
1319 | return 1; | |
1320 | } | |
1321 | ||
5d422301 | 1322 | int nfs4_schedule_stateid_recovery(const struct nfs_server *server, struct nfs4_state *state) |
0400a6b0 TM |
1323 | { |
1324 | struct nfs_client *clp = server->nfs_client; | |
1325 | ||
5d422301 TM |
1326 | if (!nfs4_valid_open_stateid(state)) |
1327 | return -EBADF; | |
0400a6b0 | 1328 | nfs4_state_mark_reclaim_nograce(clp, state); |
cc0a9843 TM |
1329 | dprintk("%s: scheduling stateid recovery for server %s\n", __func__, |
1330 | clp->cl_hostname); | |
0400a6b0 | 1331 | nfs4_schedule_state_manager(clp); |
5d422301 | 1332 | return 0; |
0400a6b0 | 1333 | } |
9cb81968 | 1334 | EXPORT_SYMBOL_GPL(nfs4_schedule_stateid_recovery); |
0400a6b0 | 1335 | |
a1d0b5ee TM |
1336 | void nfs_inode_find_state_and_recover(struct inode *inode, |
1337 | const nfs4_stateid *stateid) | |
1338 | { | |
1339 | struct nfs_client *clp = NFS_SERVER(inode)->nfs_client; | |
1340 | struct nfs_inode *nfsi = NFS_I(inode); | |
1341 | struct nfs_open_context *ctx; | |
1342 | struct nfs4_state *state; | |
1343 | bool found = false; | |
1344 | ||
1345 | spin_lock(&inode->i_lock); | |
1346 | list_for_each_entry(ctx, &nfsi->open_files, list) { | |
1347 | state = ctx->state; | |
1348 | if (state == NULL) | |
1349 | continue; | |
1350 | if (!test_bit(NFS_DELEGATED_STATE, &state->flags)) | |
1351 | continue; | |
f597c537 | 1352 | if (!nfs4_stateid_match(&state->stateid, stateid)) |
a1d0b5ee TM |
1353 | continue; |
1354 | nfs4_state_mark_reclaim_nograce(clp, state); | |
1355 | found = true; | |
1356 | } | |
1357 | spin_unlock(&inode->i_lock); | |
1358 | if (found) | |
1359 | nfs4_schedule_state_manager(clp); | |
1360 | } | |
1361 | ||
c58c8441 TM |
1362 | static void nfs4_state_mark_open_context_bad(struct nfs4_state *state) |
1363 | { | |
1364 | struct inode *inode = state->inode; | |
1365 | struct nfs_inode *nfsi = NFS_I(inode); | |
1366 | struct nfs_open_context *ctx; | |
1367 | ||
1368 | spin_lock(&inode->i_lock); | |
1369 | list_for_each_entry(ctx, &nfsi->open_files, list) { | |
1370 | if (ctx->state != state) | |
1371 | continue; | |
1372 | set_bit(NFS_CONTEXT_BAD, &ctx->flags); | |
1373 | } | |
1374 | spin_unlock(&inode->i_lock); | |
1375 | } | |
1376 | ||
5d422301 TM |
1377 | static void nfs4_state_mark_recovery_failed(struct nfs4_state *state, int error) |
1378 | { | |
1379 | set_bit(NFS_STATE_RECOVERY_FAILED, &state->flags); | |
c58c8441 | 1380 | nfs4_state_mark_open_context_bad(state); |
5d422301 TM |
1381 | } |
1382 | ||
a1d0b5ee | 1383 | |
02860014 | 1384 | static int nfs4_reclaim_locks(struct nfs4_state *state, const struct nfs4_state_recovery_ops *ops) |
1da177e4 LT |
1385 | { |
1386 | struct inode *inode = state->inode; | |
19e03c57 | 1387 | struct nfs_inode *nfsi = NFS_I(inode); |
1da177e4 LT |
1388 | struct file_lock *fl; |
1389 | int status = 0; | |
5263e31e | 1390 | struct file_lock_context *flctx = inode->i_flctx; |
bd61e0a9 | 1391 | struct list_head *list; |
1da177e4 | 1392 | |
bd61e0a9 | 1393 | if (flctx == NULL) |
3f09df70 TM |
1394 | return 0; |
1395 | ||
bd61e0a9 JL |
1396 | list = &flctx->flc_posix; |
1397 | ||
3f09df70 | 1398 | /* Guard against delegation returns and new lock/unlock calls */ |
19e03c57 | 1399 | down_write(&nfsi->rwsem); |
6109c850 | 1400 | spin_lock(&flctx->flc_lock); |
bd61e0a9 JL |
1401 | restart: |
1402 | list_for_each_entry(fl, list, fl_list) { | |
5263e31e JL |
1403 | if (nfs_file_open_context(fl->fl_file)->state != state) |
1404 | continue; | |
6109c850 | 1405 | spin_unlock(&flctx->flc_lock); |
5263e31e JL |
1406 | status = ops->recover_lock(state, fl); |
1407 | switch (status) { | |
1408 | case 0: | |
1409 | break; | |
1410 | case -ESTALE: | |
1411 | case -NFS4ERR_ADMIN_REVOKED: | |
1412 | case -NFS4ERR_STALE_STATEID: | |
1413 | case -NFS4ERR_BAD_STATEID: | |
1414 | case -NFS4ERR_EXPIRED: | |
1415 | case -NFS4ERR_NO_GRACE: | |
1416 | case -NFS4ERR_STALE_CLIENTID: | |
1417 | case -NFS4ERR_BADSESSION: | |
1418 | case -NFS4ERR_BADSLOT: | |
1419 | case -NFS4ERR_BAD_HIGH_SLOT: | |
1420 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
1421 | goto out; | |
1422 | default: | |
1423 | pr_err("NFS: %s: unhandled error %d\n", | |
1424 | __func__, status); | |
1425 | case -ENOMEM: | |
1426 | case -NFS4ERR_DENIED: | |
1427 | case -NFS4ERR_RECLAIM_BAD: | |
1428 | case -NFS4ERR_RECLAIM_CONFLICT: | |
1429 | /* kill_proc(fl->fl_pid, SIGLOST, 1); */ | |
1430 | status = 0; | |
1431 | } | |
6109c850 | 1432 | spin_lock(&flctx->flc_lock); |
5263e31e | 1433 | } |
bd61e0a9 JL |
1434 | if (list == &flctx->flc_posix) { |
1435 | list = &flctx->flc_flock; | |
1436 | goto restart; | |
1437 | } | |
6109c850 | 1438 | spin_unlock(&flctx->flc_lock); |
965b5d67 | 1439 | out: |
19e03c57 | 1440 | up_write(&nfsi->rwsem); |
1da177e4 LT |
1441 | return status; |
1442 | } | |
1443 | ||
02860014 | 1444 | static int nfs4_reclaim_open_state(struct nfs4_state_owner *sp, const struct nfs4_state_recovery_ops *ops) |
1da177e4 LT |
1445 | { |
1446 | struct nfs4_state *state; | |
1447 | struct nfs4_lock_state *lock; | |
1448 | int status = 0; | |
1449 | ||
1450 | /* Note: we rely on the sp->so_states list being ordered | |
1451 | * so that we always reclaim open(O_RDWR) and/or open(O_WRITE) | |
1452 | * states first. | |
1453 | * This is needed to ensure that the server won't give us any | |
1454 | * read delegations that we have to return if, say, we are | |
1455 | * recovering after a network partition or a reboot from a | |
1456 | * server that doesn't support a grace period. | |
1457 | */ | |
fe1d8195 | 1458 | spin_lock(&sp->so_lock); |
abbec2da | 1459 | raw_write_seqcount_begin(&sp->so_reclaim_seqcount); |
c137afab | 1460 | restart: |
1da177e4 | 1461 | list_for_each_entry(state, &sp->so_states, open_states) { |
b79a4a1b TM |
1462 | if (!test_and_clear_bit(ops->state_flag_bit, &state->flags)) |
1463 | continue; | |
5d422301 TM |
1464 | if (!nfs4_valid_open_stateid(state)) |
1465 | continue; | |
1da177e4 LT |
1466 | if (state->state == 0) |
1467 | continue; | |
fe1d8195 TM |
1468 | atomic_inc(&state->count); |
1469 | spin_unlock(&sp->so_lock); | |
1da177e4 | 1470 | status = ops->recover_open(sp, state); |
1da177e4 | 1471 | if (status >= 0) { |
02860014 TM |
1472 | status = nfs4_reclaim_locks(state, ops); |
1473 | if (status >= 0) { | |
1acd1c30 | 1474 | if (!test_bit(NFS_DELEGATED_STATE, &state->flags)) { |
6686390b N |
1475 | spin_lock(&state->state_lock); |
1476 | list_for_each_entry(lock, &state->lock_states, ls_locks) { | |
1477 | if (!test_bit(NFS_LOCK_INITIALIZED, &lock->ls_flags)) | |
1478 | pr_warn_ratelimited("NFS: " | |
1479 | "%s: Lock reclaim " | |
1480 | "failed!\n", __func__); | |
1481 | } | |
1482 | spin_unlock(&state->state_lock); | |
02860014 | 1483 | } |
fe1d8195 | 1484 | nfs4_put_open_state(state); |
c137afab | 1485 | spin_lock(&sp->so_lock); |
fe1d8195 | 1486 | goto restart; |
1da177e4 | 1487 | } |
1da177e4 LT |
1488 | } |
1489 | switch (status) { | |
1490 | default: | |
3660cd43 AA |
1491 | printk(KERN_ERR "NFS: %s: unhandled error %d\n", |
1492 | __func__, status); | |
1da177e4 | 1493 | case -ENOENT: |
965b5d67 | 1494 | case -ENOMEM: |
b79a4a1b | 1495 | case -ESTALE: |
3660cd43 | 1496 | /* Open state on this file cannot be recovered */ |
5d422301 | 1497 | nfs4_state_mark_recovery_failed(state, status); |
1da177e4 | 1498 | break; |
91876b13 TM |
1499 | case -EAGAIN: |
1500 | ssleep(1); | |
965b5d67 TM |
1501 | case -NFS4ERR_ADMIN_REVOKED: |
1502 | case -NFS4ERR_STALE_STATEID: | |
1503 | case -NFS4ERR_BAD_STATEID: | |
b79a4a1b TM |
1504 | case -NFS4ERR_RECLAIM_BAD: |
1505 | case -NFS4ERR_RECLAIM_CONFLICT: | |
1f0e890d | 1506 | nfs4_state_mark_reclaim_nograce(sp->so_server->nfs_client, state); |
b79a4a1b | 1507 | break; |
1da177e4 LT |
1508 | case -NFS4ERR_EXPIRED: |
1509 | case -NFS4ERR_NO_GRACE: | |
1f0e890d | 1510 | nfs4_state_mark_reclaim_nograce(sp->so_server->nfs_client, state); |
1da177e4 | 1511 | case -NFS4ERR_STALE_CLIENTID: |
9c4c761a TM |
1512 | case -NFS4ERR_BADSESSION: |
1513 | case -NFS4ERR_BADSLOT: | |
1514 | case -NFS4ERR_BAD_HIGH_SLOT: | |
1515 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
1da177e4 LT |
1516 | goto out_err; |
1517 | } | |
fe1d8195 | 1518 | nfs4_put_open_state(state); |
c137afab | 1519 | spin_lock(&sp->so_lock); |
fe1d8195 | 1520 | goto restart; |
1da177e4 | 1521 | } |
abbec2da | 1522 | raw_write_seqcount_end(&sp->so_reclaim_seqcount); |
fe1d8195 | 1523 | spin_unlock(&sp->so_lock); |
1da177e4 LT |
1524 | return 0; |
1525 | out_err: | |
fe1d8195 | 1526 | nfs4_put_open_state(state); |
c137afab | 1527 | spin_lock(&sp->so_lock); |
abbec2da | 1528 | raw_write_seqcount_end(&sp->so_reclaim_seqcount); |
c137afab | 1529 | spin_unlock(&sp->so_lock); |
1da177e4 LT |
1530 | return status; |
1531 | } | |
1532 | ||
b79a4a1b TM |
1533 | static void nfs4_clear_open_state(struct nfs4_state *state) |
1534 | { | |
1535 | struct nfs4_lock_state *lock; | |
1536 | ||
1537 | clear_bit(NFS_DELEGATED_STATE, &state->flags); | |
1538 | clear_bit(NFS_O_RDONLY_STATE, &state->flags); | |
1539 | clear_bit(NFS_O_WRONLY_STATE, &state->flags); | |
1540 | clear_bit(NFS_O_RDWR_STATE, &state->flags); | |
4b44b40e | 1541 | spin_lock(&state->state_lock); |
b79a4a1b | 1542 | list_for_each_entry(lock, &state->lock_states, ls_locks) { |
b79a4a1b | 1543 | lock->ls_seqid.flags = 0; |
795a88c9 | 1544 | clear_bit(NFS_LOCK_INITIALIZED, &lock->ls_flags); |
b79a4a1b | 1545 | } |
4b44b40e | 1546 | spin_unlock(&state->state_lock); |
b79a4a1b TM |
1547 | } |
1548 | ||
24d292b8 CL |
1549 | static void nfs4_reset_seqids(struct nfs_server *server, |
1550 | int (*mark_reclaim)(struct nfs_client *clp, struct nfs4_state *state)) | |
cee54fc9 | 1551 | { |
24d292b8 | 1552 | struct nfs_client *clp = server->nfs_client; |
cee54fc9 | 1553 | struct nfs4_state_owner *sp; |
9f958ab8 | 1554 | struct rb_node *pos; |
cee54fc9 | 1555 | struct nfs4_state *state; |
cee54fc9 | 1556 | |
24d292b8 CL |
1557 | spin_lock(&clp->cl_lock); |
1558 | for (pos = rb_first(&server->state_owners); | |
1559 | pos != NULL; | |
1560 | pos = rb_next(pos)) { | |
1561 | sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); | |
cee54fc9 | 1562 | sp->so_seqid.flags = 0; |
ec073428 | 1563 | spin_lock(&sp->so_lock); |
cee54fc9 | 1564 | list_for_each_entry(state, &sp->so_states, open_states) { |
b79a4a1b TM |
1565 | if (mark_reclaim(clp, state)) |
1566 | nfs4_clear_open_state(state); | |
cee54fc9 | 1567 | } |
ec073428 | 1568 | spin_unlock(&sp->so_lock); |
cee54fc9 | 1569 | } |
24d292b8 CL |
1570 | spin_unlock(&clp->cl_lock); |
1571 | } | |
1572 | ||
1573 | static void nfs4_state_mark_reclaim_helper(struct nfs_client *clp, | |
1574 | int (*mark_reclaim)(struct nfs_client *clp, struct nfs4_state *state)) | |
1575 | { | |
1576 | struct nfs_server *server; | |
1577 | ||
1578 | rcu_read_lock(); | |
1579 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) | |
1580 | nfs4_reset_seqids(server, mark_reclaim); | |
1581 | rcu_read_unlock(); | |
cee54fc9 TM |
1582 | } |
1583 | ||
b79a4a1b TM |
1584 | static void nfs4_state_start_reclaim_reboot(struct nfs_client *clp) |
1585 | { | |
1586 | /* Mark all delegations for reclaim */ | |
1587 | nfs_delegation_mark_reclaim(clp); | |
1588 | nfs4_state_mark_reclaim_helper(clp, nfs4_state_mark_reclaim_reboot); | |
1589 | } | |
1590 | ||
fce5c838 | 1591 | static void nfs4_reclaim_complete(struct nfs_client *clp, |
965e9c23 TM |
1592 | const struct nfs4_state_recovery_ops *ops, |
1593 | struct rpc_cred *cred) | |
fce5c838 RL |
1594 | { |
1595 | /* Notify the server we're done reclaiming our state */ | |
1596 | if (ops->reclaim_complete) | |
965e9c23 | 1597 | (void)ops->reclaim_complete(clp, cred); |
fce5c838 RL |
1598 | } |
1599 | ||
24d292b8 | 1600 | static void nfs4_clear_reclaim_server(struct nfs_server *server) |
b79a4a1b | 1601 | { |
24d292b8 | 1602 | struct nfs_client *clp = server->nfs_client; |
b79a4a1b TM |
1603 | struct nfs4_state_owner *sp; |
1604 | struct rb_node *pos; | |
1605 | struct nfs4_state *state; | |
1606 | ||
24d292b8 CL |
1607 | spin_lock(&clp->cl_lock); |
1608 | for (pos = rb_first(&server->state_owners); | |
1609 | pos != NULL; | |
1610 | pos = rb_next(pos)) { | |
1611 | sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); | |
b79a4a1b TM |
1612 | spin_lock(&sp->so_lock); |
1613 | list_for_each_entry(state, &sp->so_states, open_states) { | |
24d292b8 CL |
1614 | if (!test_and_clear_bit(NFS_STATE_RECLAIM_REBOOT, |
1615 | &state->flags)) | |
b79a4a1b TM |
1616 | continue; |
1617 | nfs4_state_mark_reclaim_nograce(clp, state); | |
1618 | } | |
1619 | spin_unlock(&sp->so_lock); | |
1620 | } | |
24d292b8 CL |
1621 | spin_unlock(&clp->cl_lock); |
1622 | } | |
1623 | ||
1624 | static int nfs4_state_clear_reclaim_reboot(struct nfs_client *clp) | |
1625 | { | |
1626 | struct nfs_server *server; | |
1627 | ||
1628 | if (!test_and_clear_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) | |
1629 | return 0; | |
1630 | ||
1631 | rcu_read_lock(); | |
1632 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) | |
1633 | nfs4_clear_reclaim_server(server); | |
1634 | rcu_read_unlock(); | |
b79a4a1b TM |
1635 | |
1636 | nfs_delegation_reap_unclaimed(clp); | |
6eaa6149 TM |
1637 | return 1; |
1638 | } | |
1639 | ||
1640 | static void nfs4_state_end_reclaim_reboot(struct nfs_client *clp) | |
1641 | { | |
965e9c23 TM |
1642 | const struct nfs4_state_recovery_ops *ops; |
1643 | struct rpc_cred *cred; | |
1644 | ||
6eaa6149 TM |
1645 | if (!nfs4_state_clear_reclaim_reboot(clp)) |
1646 | return; | |
965e9c23 | 1647 | ops = clp->cl_mvops->reboot_recovery_ops; |
73d8bde5 | 1648 | cred = nfs4_get_clid_cred(clp); |
965e9c23 TM |
1649 | nfs4_reclaim_complete(clp, ops, cred); |
1650 | put_rpccred(cred); | |
b79a4a1b TM |
1651 | } |
1652 | ||
1653 | static void nfs_delegation_clear_all(struct nfs_client *clp) | |
1654 | { | |
1655 | nfs_delegation_mark_reclaim(clp); | |
1656 | nfs_delegation_reap_unclaimed(clp); | |
1657 | } | |
1658 | ||
1659 | static void nfs4_state_start_reclaim_nograce(struct nfs_client *clp) | |
1660 | { | |
1661 | nfs_delegation_clear_all(clp); | |
1662 | nfs4_state_mark_reclaim_helper(clp, nfs4_state_mark_reclaim_nograce); | |
1663 | } | |
1664 | ||
4f7cdf18 | 1665 | static int nfs4_recovery_handle_error(struct nfs_client *clp, int error) |
e598d843 TM |
1666 | { |
1667 | switch (error) { | |
4f38e4aa TM |
1668 | case 0: |
1669 | break; | |
e598d843 | 1670 | case -NFS4ERR_CB_PATH_DOWN: |
ad1e3968 | 1671 | nfs40_handle_cb_pathdown(clp); |
4f38e4aa | 1672 | break; |
c8b7ae3d TM |
1673 | case -NFS4ERR_NO_GRACE: |
1674 | nfs4_state_end_reclaim_reboot(clp); | |
4f38e4aa | 1675 | break; |
e598d843 | 1676 | case -NFS4ERR_STALE_CLIENTID: |
e598d843 | 1677 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); |
6eaa6149 | 1678 | nfs4_state_clear_reclaim_reboot(clp); |
e598d843 TM |
1679 | nfs4_state_start_reclaim_reboot(clp); |
1680 | break; | |
1681 | case -NFS4ERR_EXPIRED: | |
1682 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1683 | nfs4_state_start_reclaim_nograce(clp); | |
8ba9bf8e | 1684 | break; |
c3fad1b1 AA |
1685 | case -NFS4ERR_BADSESSION: |
1686 | case -NFS4ERR_BADSLOT: | |
1687 | case -NFS4ERR_BAD_HIGH_SLOT: | |
1688 | case -NFS4ERR_DEADSESSION: | |
c3fad1b1 AA |
1689 | case -NFS4ERR_SEQ_FALSE_RETRY: |
1690 | case -NFS4ERR_SEQ_MISORDERED: | |
6df08189 | 1691 | set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); |
0b9e2d41 | 1692 | /* Zero session reset errors */ |
4f38e4aa | 1693 | break; |
7c5d7256 TM |
1694 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: |
1695 | set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); | |
1696 | break; | |
4f38e4aa | 1697 | default: |
cc0a9843 TM |
1698 | dprintk("%s: failed to handle error %d for server %s\n", |
1699 | __func__, error, clp->cl_hostname); | |
4f38e4aa | 1700 | return error; |
e598d843 | 1701 | } |
cc0a9843 TM |
1702 | dprintk("%s: handled error %d for server %s\n", __func__, error, |
1703 | clp->cl_hostname); | |
4f38e4aa | 1704 | return 0; |
e598d843 TM |
1705 | } |
1706 | ||
02860014 | 1707 | static int nfs4_do_reclaim(struct nfs_client *clp, const struct nfs4_state_recovery_ops *ops) |
1da177e4 | 1708 | { |
24d292b8 CL |
1709 | struct nfs4_state_owner *sp; |
1710 | struct nfs_server *server; | |
9f958ab8 | 1711 | struct rb_node *pos; |
1da177e4 LT |
1712 | int status = 0; |
1713 | ||
7eff03ae | 1714 | restart: |
24d292b8 CL |
1715 | rcu_read_lock(); |
1716 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { | |
0aaaf5c4 | 1717 | nfs4_purge_state_owners(server); |
24d292b8 CL |
1718 | spin_lock(&clp->cl_lock); |
1719 | for (pos = rb_first(&server->state_owners); | |
1720 | pos != NULL; | |
1721 | pos = rb_next(pos)) { | |
1722 | sp = rb_entry(pos, | |
1723 | struct nfs4_state_owner, so_server_node); | |
1724 | if (!test_and_clear_bit(ops->owner_flag_bit, | |
1725 | &sp->so_flags)) | |
1726 | continue; | |
1727 | atomic_inc(&sp->so_count); | |
1728 | spin_unlock(&clp->cl_lock); | |
1729 | rcu_read_unlock(); | |
1730 | ||
1731 | status = nfs4_reclaim_open_state(sp, ops); | |
1732 | if (status < 0) { | |
1733 | set_bit(ops->owner_flag_bit, &sp->so_flags); | |
1734 | nfs4_put_state_owner(sp); | |
df817ba3 TM |
1735 | status = nfs4_recovery_handle_error(clp, status); |
1736 | return (status != 0) ? status : -EAGAIN; | |
24d292b8 CL |
1737 | } |
1738 | ||
7eff03ae | 1739 | nfs4_put_state_owner(sp); |
24d292b8 | 1740 | goto restart; |
7eff03ae | 1741 | } |
24d292b8 | 1742 | spin_unlock(&clp->cl_lock); |
02860014 | 1743 | } |
24d292b8 | 1744 | rcu_read_unlock(); |
df817ba3 | 1745 | return 0; |
02860014 TM |
1746 | } |
1747 | ||
1748 | static int nfs4_check_lease(struct nfs_client *clp) | |
1749 | { | |
1750 | struct rpc_cred *cred; | |
c48f4f35 TM |
1751 | const struct nfs4_state_maintenance_ops *ops = |
1752 | clp->cl_mvops->state_renewal_ops; | |
4f38e4aa | 1753 | int status; |
1da177e4 | 1754 | |
0f605b56 TM |
1755 | /* Is the client already known to have an expired lease? */ |
1756 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) | |
1757 | return 0; | |
a7b72103 AA |
1758 | spin_lock(&clp->cl_lock); |
1759 | cred = ops->get_state_renewal_cred_locked(clp); | |
1760 | spin_unlock(&clp->cl_lock); | |
0f605b56 | 1761 | if (cred == NULL) { |
73d8bde5 | 1762 | cred = nfs4_get_clid_cred(clp); |
4f38e4aa | 1763 | status = -ENOKEY; |
0f605b56 TM |
1764 | if (cred == NULL) |
1765 | goto out; | |
286d7d6a | 1766 | } |
8e69514f | 1767 | status = ops->renew_lease(clp, cred); |
0f605b56 | 1768 | put_rpccred(cred); |
bc7a05ca TM |
1769 | if (status == -ETIMEDOUT) { |
1770 | set_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); | |
1771 | return 0; | |
1772 | } | |
0f605b56 | 1773 | out: |
4f7cdf18 | 1774 | return nfs4_recovery_handle_error(clp, status); |
02860014 TM |
1775 | } |
1776 | ||
47b803c8 AA |
1777 | /* Set NFS4CLNT_LEASE_EXPIRED and reclaim reboot state for all v4.0 errors |
1778 | * and for recoverable errors on EXCHANGE_ID for v4.1 | |
2a6ee6aa TM |
1779 | */ |
1780 | static int nfs4_handle_reclaim_lease_error(struct nfs_client *clp, int status) | |
1781 | { | |
1782 | switch (status) { | |
89a21736 TM |
1783 | case -NFS4ERR_SEQ_MISORDERED: |
1784 | if (test_and_set_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) | |
1785 | return -ESERVERFAULT; | |
1786 | /* Lease confirmation error: retry after purging the lease */ | |
1787 | ssleep(1); | |
47b803c8 AA |
1788 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
1789 | break; | |
2a6ee6aa TM |
1790 | case -NFS4ERR_STALE_CLIENTID: |
1791 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); | |
47b803c8 | 1792 | nfs4_state_start_reclaim_reboot(clp); |
2a6ee6aa | 1793 | break; |
de734831 CL |
1794 | case -NFS4ERR_CLID_INUSE: |
1795 | pr_err("NFS: Server %s reports our clientid is in use\n", | |
1796 | clp->cl_hostname); | |
1797 | nfs_mark_client_ready(clp, -EPERM); | |
1798 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); | |
1799 | return -EPERM; | |
2a6ee6aa | 1800 | case -EACCES: |
2a6ee6aa TM |
1801 | case -NFS4ERR_DELAY: |
1802 | case -ETIMEDOUT: | |
1803 | case -EAGAIN: | |
1804 | ssleep(1); | |
1805 | break; | |
1806 | ||
1807 | case -NFS4ERR_MINOR_VERS_MISMATCH: | |
1808 | if (clp->cl_cons_state == NFS_CS_SESSION_INITING) | |
1809 | nfs_mark_client_ready(clp, -EPROTONOSUPPORT); | |
cc0a9843 TM |
1810 | dprintk("%s: exit with error %d for server %s\n", |
1811 | __func__, -EPROTONOSUPPORT, clp->cl_hostname); | |
2a6ee6aa | 1812 | return -EPROTONOSUPPORT; |
2a6ee6aa TM |
1813 | case -NFS4ERR_NOT_SAME: /* FixMe: implement recovery |
1814 | * in nfs4_exchange_id */ | |
1815 | default: | |
cc0a9843 TM |
1816 | dprintk("%s: exit with error %d for server %s\n", __func__, |
1817 | status, clp->cl_hostname); | |
2a6ee6aa TM |
1818 | return status; |
1819 | } | |
1820 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
cc0a9843 TM |
1821 | dprintk("%s: handled error %d for server %s\n", __func__, status, |
1822 | clp->cl_hostname); | |
2a6ee6aa TM |
1823 | return 0; |
1824 | } | |
1825 | ||
b42353ff | 1826 | static int nfs4_establish_lease(struct nfs_client *clp) |
02860014 TM |
1827 | { |
1828 | struct rpc_cred *cred; | |
c48f4f35 TM |
1829 | const struct nfs4_state_recovery_ops *ops = |
1830 | clp->cl_mvops->reboot_recovery_ops; | |
2a6ee6aa | 1831 | int status; |
02860014 | 1832 | |
73d8bde5 | 1833 | cred = nfs4_get_clid_cred(clp); |
2a6ee6aa TM |
1834 | if (cred == NULL) |
1835 | return -ENOENT; | |
1836 | status = ops->establish_clid(clp, cred); | |
1837 | put_rpccred(cred); | |
1838 | if (status != 0) | |
b42353ff TM |
1839 | return status; |
1840 | pnfs_destroy_all_layouts(clp); | |
1841 | return 0; | |
1842 | } | |
1843 | ||
6bbb4ae8 CL |
1844 | /* |
1845 | * Returns zero or a negative errno. NFS4ERR values are converted | |
1846 | * to local errno values. | |
1847 | */ | |
b42353ff TM |
1848 | static int nfs4_reclaim_lease(struct nfs_client *clp) |
1849 | { | |
1850 | int status; | |
1851 | ||
1852 | status = nfs4_establish_lease(clp); | |
1853 | if (status < 0) | |
1854 | return nfs4_handle_reclaim_lease_error(clp, status); | |
1855 | if (test_and_clear_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state)) | |
1856 | nfs4_state_start_reclaim_nograce(clp); | |
1857 | if (!test_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) | |
1858 | set_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state); | |
1859 | clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); | |
1860 | clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1861 | return 0; | |
1862 | } | |
1863 | ||
1864 | static int nfs4_purge_lease(struct nfs_client *clp) | |
1865 | { | |
1866 | int status; | |
1867 | ||
1868 | status = nfs4_establish_lease(clp); | |
1869 | if (status < 0) | |
2a6ee6aa | 1870 | return nfs4_handle_reclaim_lease_error(clp, status); |
b42353ff TM |
1871 | clear_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state); |
1872 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1873 | nfs4_state_start_reclaim_nograce(clp); | |
2a6ee6aa | 1874 | return 0; |
02860014 TM |
1875 | } |
1876 | ||
c9fdeb28 CL |
1877 | /* |
1878 | * Try remote migration of one FSID from a source server to a | |
1879 | * destination server. The source server provides a list of | |
1880 | * potential destinations. | |
1881 | * | |
1882 | * Returns zero or a negative NFS4ERR status code. | |
1883 | */ | |
1884 | static int nfs4_try_migration(struct nfs_server *server, struct rpc_cred *cred) | |
1885 | { | |
1886 | struct nfs_client *clp = server->nfs_client; | |
1887 | struct nfs4_fs_locations *locations = NULL; | |
1888 | struct inode *inode; | |
1889 | struct page *page; | |
1890 | int status, result; | |
1891 | ||
1892 | dprintk("--> %s: FSID %llx:%llx on \"%s\"\n", __func__, | |
1893 | (unsigned long long)server->fsid.major, | |
1894 | (unsigned long long)server->fsid.minor, | |
1895 | clp->cl_hostname); | |
1896 | ||
1897 | result = 0; | |
1898 | page = alloc_page(GFP_KERNEL); | |
1899 | locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL); | |
1900 | if (page == NULL || locations == NULL) { | |
1901 | dprintk("<-- %s: no memory\n", __func__); | |
1902 | goto out; | |
1903 | } | |
1904 | ||
2b0143b5 | 1905 | inode = d_inode(server->super->s_root); |
c9fdeb28 CL |
1906 | result = nfs4_proc_get_locations(inode, locations, page, cred); |
1907 | if (result) { | |
1908 | dprintk("<-- %s: failed to retrieve fs_locations: %d\n", | |
1909 | __func__, result); | |
1910 | goto out; | |
1911 | } | |
1912 | ||
1913 | result = -NFS4ERR_NXIO; | |
1914 | if (!(locations->fattr.valid & NFS_ATTR_FATTR_V4_LOCATIONS)) { | |
1915 | dprintk("<-- %s: No fs_locations data, migration skipped\n", | |
1916 | __func__); | |
1917 | goto out; | |
1918 | } | |
1919 | ||
1920 | nfs4_begin_drain_session(clp); | |
1921 | ||
1922 | status = nfs4_replace_transport(server, locations); | |
1923 | if (status != 0) { | |
1924 | dprintk("<-- %s: failed to replace transport: %d\n", | |
1925 | __func__, status); | |
1926 | goto out; | |
1927 | } | |
1928 | ||
1929 | result = 0; | |
1930 | dprintk("<-- %s: migration succeeded\n", __func__); | |
1931 | ||
1932 | out: | |
1933 | if (page != NULL) | |
1934 | __free_page(page); | |
1935 | kfree(locations); | |
1936 | if (result) { | |
1937 | pr_err("NFS: migration recovery failed (server %s)\n", | |
1938 | clp->cl_hostname); | |
1939 | set_bit(NFS_MIG_FAILED, &server->mig_status); | |
1940 | } | |
1941 | return result; | |
1942 | } | |
1943 | ||
1944 | /* | |
1945 | * Returns zero or a negative NFS4ERR status code. | |
1946 | */ | |
1947 | static int nfs4_handle_migration(struct nfs_client *clp) | |
1948 | { | |
1949 | const struct nfs4_state_maintenance_ops *ops = | |
1950 | clp->cl_mvops->state_renewal_ops; | |
1951 | struct nfs_server *server; | |
1952 | struct rpc_cred *cred; | |
1953 | ||
1954 | dprintk("%s: migration reported on \"%s\"\n", __func__, | |
1955 | clp->cl_hostname); | |
1956 | ||
1957 | spin_lock(&clp->cl_lock); | |
1958 | cred = ops->get_state_renewal_cred_locked(clp); | |
1959 | spin_unlock(&clp->cl_lock); | |
1960 | if (cred == NULL) | |
1961 | return -NFS4ERR_NOENT; | |
1962 | ||
1963 | clp->cl_mig_gen++; | |
1964 | restart: | |
1965 | rcu_read_lock(); | |
1966 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { | |
1967 | int status; | |
1968 | ||
1969 | if (server->mig_gen == clp->cl_mig_gen) | |
1970 | continue; | |
1971 | server->mig_gen = clp->cl_mig_gen; | |
1972 | ||
1973 | if (!test_and_clear_bit(NFS_MIG_IN_TRANSITION, | |
1974 | &server->mig_status)) | |
1975 | continue; | |
1976 | ||
1977 | rcu_read_unlock(); | |
1978 | status = nfs4_try_migration(server, cred); | |
1979 | if (status < 0) { | |
1980 | put_rpccred(cred); | |
1981 | return status; | |
1982 | } | |
1983 | goto restart; | |
1984 | } | |
1985 | rcu_read_unlock(); | |
1986 | put_rpccred(cred); | |
1987 | return 0; | |
1988 | } | |
1989 | ||
b7f7a66e CL |
1990 | /* |
1991 | * Test each nfs_server on the clp's cl_superblocks list to see | |
1992 | * if it's moved to another server. Stop when the server no longer | |
1993 | * returns NFS4ERR_LEASE_MOVED. | |
1994 | */ | |
1995 | static int nfs4_handle_lease_moved(struct nfs_client *clp) | |
1996 | { | |
1997 | const struct nfs4_state_maintenance_ops *ops = | |
1998 | clp->cl_mvops->state_renewal_ops; | |
1999 | struct nfs_server *server; | |
2000 | struct rpc_cred *cred; | |
2001 | ||
2002 | dprintk("%s: lease moved reported on \"%s\"\n", __func__, | |
2003 | clp->cl_hostname); | |
2004 | ||
2005 | spin_lock(&clp->cl_lock); | |
2006 | cred = ops->get_state_renewal_cred_locked(clp); | |
2007 | spin_unlock(&clp->cl_lock); | |
2008 | if (cred == NULL) | |
2009 | return -NFS4ERR_NOENT; | |
2010 | ||
2011 | clp->cl_mig_gen++; | |
2012 | restart: | |
2013 | rcu_read_lock(); | |
2014 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { | |
2015 | struct inode *inode; | |
2016 | int status; | |
2017 | ||
2018 | if (server->mig_gen == clp->cl_mig_gen) | |
2019 | continue; | |
2020 | server->mig_gen = clp->cl_mig_gen; | |
2021 | ||
2022 | rcu_read_unlock(); | |
2023 | ||
2b0143b5 | 2024 | inode = d_inode(server->super->s_root); |
b7f7a66e CL |
2025 | status = nfs4_proc_fsid_present(inode, cred); |
2026 | if (status != -NFS4ERR_MOVED) | |
2027 | goto restart; /* wasn't this one */ | |
2028 | if (nfs4_try_migration(server, cred) == -NFS4ERR_LEASE_MOVED) | |
2029 | goto restart; /* there are more */ | |
2030 | goto out; | |
2031 | } | |
2032 | rcu_read_unlock(); | |
2033 | ||
2034 | out: | |
2035 | put_rpccred(cred); | |
2036 | return 0; | |
2037 | } | |
2038 | ||
05f4c350 CL |
2039 | /** |
2040 | * nfs4_discover_server_trunking - Detect server IP address trunking | |
2041 | * | |
2042 | * @clp: nfs_client under test | |
2043 | * @result: OUT: found nfs_client, or clp | |
2044 | * | |
2045 | * Returns zero or a negative errno. If zero is returned, | |
2046 | * an nfs_client pointer is planted in "result". | |
2047 | * | |
2048 | * Note: since we are invoked in process context, and | |
2049 | * not from inside the state manager, we cannot use | |
2050 | * nfs4_handle_reclaim_lease_error(). | |
2051 | */ | |
2052 | int nfs4_discover_server_trunking(struct nfs_client *clp, | |
2053 | struct nfs_client **result) | |
2054 | { | |
2055 | const struct nfs4_state_recovery_ops *ops = | |
2056 | clp->cl_mvops->reboot_recovery_ops; | |
05f4c350 CL |
2057 | struct rpc_clnt *clnt; |
2058 | struct rpc_cred *cred; | |
4edaa308 | 2059 | int i, status; |
05f4c350 CL |
2060 | |
2061 | dprintk("NFS: %s: testing '%s'\n", __func__, clp->cl_hostname); | |
2062 | ||
05f4c350 | 2063 | clnt = clp->cl_rpcclient; |
05f4c350 CL |
2064 | i = 0; |
2065 | ||
2066 | mutex_lock(&nfs_clid_init_mutex); | |
05f4c350 | 2067 | again: |
ea33e6c3 | 2068 | status = -ENOENT; |
73d8bde5 | 2069 | cred = nfs4_get_clid_cred(clp); |
05f4c350 CL |
2070 | if (cred == NULL) |
2071 | goto out_unlock; | |
2072 | ||
2073 | status = ops->detect_trunking(clp, result, cred); | |
2074 | put_rpccred(cred); | |
2075 | switch (status) { | |
2076 | case 0: | |
2077 | break; | |
05f4c350 | 2078 | case -ETIMEDOUT: |
150e7260 TM |
2079 | if (clnt->cl_softrtry) |
2080 | break; | |
2081 | case -NFS4ERR_DELAY: | |
05f4c350 CL |
2082 | case -EAGAIN: |
2083 | ssleep(1); | |
202c312d | 2084 | case -NFS4ERR_STALE_CLIENTID: |
05f4c350 CL |
2085 | dprintk("NFS: %s after status %d, retrying\n", |
2086 | __func__, status); | |
2087 | goto again; | |
4edaa308 | 2088 | case -EACCES: |
d688f7b8 CL |
2089 | if (i++ == 0) { |
2090 | nfs4_root_machine_cred(clp); | |
2091 | goto again; | |
2092 | } | |
6d769f1e | 2093 | if (clnt->cl_auth->au_flavor == RPC_AUTH_UNIX) |
4edaa308 | 2094 | break; |
05f4c350 CL |
2095 | case -NFS4ERR_CLID_INUSE: |
2096 | case -NFS4ERR_WRONGSEC: | |
6d769f1e JL |
2097 | /* No point in retrying if we already used RPC_AUTH_UNIX */ |
2098 | if (clnt->cl_auth->au_flavor == RPC_AUTH_UNIX) { | |
2099 | status = -EPERM; | |
2100 | break; | |
2101 | } | |
79d852bf | 2102 | clnt = rpc_clone_client_set_auth(clnt, RPC_AUTH_UNIX); |
05f4c350 CL |
2103 | if (IS_ERR(clnt)) { |
2104 | status = PTR_ERR(clnt); | |
2105 | break; | |
2106 | } | |
b193d59a TM |
2107 | /* Note: this is safe because we haven't yet marked the |
2108 | * client as ready, so we are the only user of | |
2109 | * clp->cl_rpcclient | |
2110 | */ | |
2111 | clnt = xchg(&clp->cl_rpcclient, clnt); | |
2112 | rpc_shutdown_client(clnt); | |
2113 | clnt = clp->cl_rpcclient; | |
05f4c350 CL |
2114 | goto again; |
2115 | ||
2116 | case -NFS4ERR_MINOR_VERS_MISMATCH: | |
2117 | status = -EPROTONOSUPPORT; | |
2118 | break; | |
2119 | ||
2120 | case -EKEYEXPIRED: | |
05f4c350 CL |
2121 | case -NFS4ERR_NOT_SAME: /* FixMe: implement recovery |
2122 | * in nfs4_exchange_id */ | |
2123 | status = -EKEYEXPIRED; | |
ea33e6c3 TM |
2124 | break; |
2125 | default: | |
2126 | pr_warn("NFS: %s unhandled error %d. Exiting with error EIO\n", | |
2127 | __func__, status); | |
2128 | status = -EIO; | |
05f4c350 CL |
2129 | } |
2130 | ||
2131 | out_unlock: | |
2132 | mutex_unlock(&nfs_clid_init_mutex); | |
05f4c350 CL |
2133 | dprintk("NFS: %s: status = %d\n", __func__, status); |
2134 | return status; | |
2135 | } | |
2136 | ||
76db6d95 | 2137 | #ifdef CONFIG_NFS_V4_1 |
9f594791 | 2138 | void nfs4_schedule_session_recovery(struct nfs4_session *session, int err) |
0400a6b0 | 2139 | { |
444f72fe TM |
2140 | struct nfs_client *clp = session->clp; |
2141 | ||
9f594791 TM |
2142 | switch (err) { |
2143 | default: | |
2144 | set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); | |
2145 | break; | |
2146 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
2147 | set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); | |
2148 | } | |
444f72fe | 2149 | nfs4_schedule_lease_recovery(clp); |
0400a6b0 | 2150 | } |
cbdabc7f | 2151 | EXPORT_SYMBOL_GPL(nfs4_schedule_session_recovery); |
0400a6b0 | 2152 | |
ac074835 TM |
2153 | static void nfs41_ping_server(struct nfs_client *clp) |
2154 | { | |
2155 | /* Use CHECK_LEASE to ping the server with a SEQUENCE */ | |
2156 | set_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); | |
2157 | nfs4_schedule_state_manager(clp); | |
2158 | } | |
2159 | ||
2160 | void nfs41_server_notify_target_slotid_update(struct nfs_client *clp) | |
2161 | { | |
2162 | nfs41_ping_server(clp); | |
2163 | } | |
2164 | ||
c10e4498 TM |
2165 | void nfs41_server_notify_highest_slotid_update(struct nfs_client *clp) |
2166 | { | |
2167 | nfs41_ping_server(clp); | |
2168 | } | |
2169 | ||
0f79fd6f TM |
2170 | static void nfs4_reset_all_state(struct nfs_client *clp) |
2171 | { | |
2172 | if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) == 0) { | |
2c820d9a | 2173 | set_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state); |
be0bfed0 | 2174 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
0f79fd6f | 2175 | nfs4_state_start_reclaim_nograce(clp); |
cc0a9843 TM |
2176 | dprintk("%s: scheduling reset of all state for server %s!\n", |
2177 | __func__, clp->cl_hostname); | |
0400a6b0 | 2178 | nfs4_schedule_state_manager(clp); |
0f79fd6f TM |
2179 | } |
2180 | } | |
2181 | ||
2182 | static void nfs41_handle_server_reboot(struct nfs_client *clp) | |
2183 | { | |
2184 | if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) == 0) { | |
2185 | nfs4_state_start_reclaim_reboot(clp); | |
cc0a9843 TM |
2186 | dprintk("%s: server %s rebooted!\n", __func__, |
2187 | clp->cl_hostname); | |
0400a6b0 | 2188 | nfs4_schedule_state_manager(clp); |
0f79fd6f TM |
2189 | } |
2190 | } | |
2191 | ||
2192 | static void nfs41_handle_state_revoked(struct nfs_client *clp) | |
2193 | { | |
0f79fd6f | 2194 | nfs4_reset_all_state(clp); |
cc0a9843 | 2195 | dprintk("%s: state revoked on server %s\n", __func__, clp->cl_hostname); |
0f79fd6f TM |
2196 | } |
2197 | ||
2198 | static void nfs41_handle_recallable_state_revoked(struct nfs_client *clp) | |
2199 | { | |
2200 | /* This will need to handle layouts too */ | |
2201 | nfs_expire_all_delegations(clp); | |
cc0a9843 TM |
2202 | dprintk("%s: Recallable state revoked on server %s!\n", __func__, |
2203 | clp->cl_hostname); | |
0f79fd6f TM |
2204 | } |
2205 | ||
a9e64442 | 2206 | static void nfs41_handle_backchannel_fault(struct nfs_client *clp) |
0f79fd6f TM |
2207 | { |
2208 | nfs_expire_all_delegations(clp); | |
2209 | if (test_and_set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state) == 0) | |
0400a6b0 | 2210 | nfs4_schedule_state_manager(clp); |
cc0a9843 TM |
2211 | dprintk("%s: server %s declared a backchannel fault\n", __func__, |
2212 | clp->cl_hostname); | |
0f79fd6f TM |
2213 | } |
2214 | ||
a9e64442 WAA |
2215 | static void nfs41_handle_cb_path_down(struct nfs_client *clp) |
2216 | { | |
2217 | if (test_and_set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, | |
2218 | &clp->cl_state) == 0) | |
2219 | nfs4_schedule_state_manager(clp); | |
2220 | } | |
2221 | ||
0629e370 AB |
2222 | void nfs41_handle_sequence_flag_errors(struct nfs_client *clp, u32 flags) |
2223 | { | |
2224 | if (!flags) | |
2225 | return; | |
2c820d9a CL |
2226 | |
2227 | dprintk("%s: \"%s\" (client ID %llx) flags=0x%08x\n", | |
2228 | __func__, clp->cl_hostname, clp->cl_clientid, flags); | |
2229 | ||
111d489f | 2230 | if (flags & SEQ4_STATUS_RESTART_RECLAIM_NEEDED) |
0f79fd6f | 2231 | nfs41_handle_server_reboot(clp); |
111d489f | 2232 | if (flags & (SEQ4_STATUS_EXPIRED_ALL_STATE_REVOKED | |
0629e370 | 2233 | SEQ4_STATUS_EXPIRED_SOME_STATE_REVOKED | |
d1c2331e | 2234 | SEQ4_STATUS_ADMIN_STATE_REVOKED)) |
0f79fd6f | 2235 | nfs41_handle_state_revoked(clp); |
d1c2331e CL |
2236 | if (flags & SEQ4_STATUS_LEASE_MOVED) |
2237 | nfs4_schedule_lease_moved_recovery(clp); | |
111d489f | 2238 | if (flags & SEQ4_STATUS_RECALLABLE_STATE_REVOKED) |
0f79fd6f | 2239 | nfs41_handle_recallable_state_revoked(clp); |
a9e64442 WAA |
2240 | if (flags & SEQ4_STATUS_BACKCHANNEL_FAULT) |
2241 | nfs41_handle_backchannel_fault(clp); | |
2242 | else if (flags & (SEQ4_STATUS_CB_PATH_DOWN | | |
2243 | SEQ4_STATUS_CB_PATH_DOWN_SESSION)) | |
0f79fd6f | 2244 | nfs41_handle_cb_path_down(clp); |
0629e370 AB |
2245 | } |
2246 | ||
c3fad1b1 AA |
2247 | static int nfs4_reset_session(struct nfs_client *clp) |
2248 | { | |
848f5bda | 2249 | struct rpc_cred *cred; |
c3fad1b1 AA |
2250 | int status; |
2251 | ||
1a47e7a6 TM |
2252 | if (!nfs4_has_session(clp)) |
2253 | return 0; | |
38045412 | 2254 | nfs4_begin_drain_session(clp); |
73d8bde5 | 2255 | cred = nfs4_get_clid_cred(clp); |
848f5bda | 2256 | status = nfs4_proc_destroy_session(clp->cl_session, cred); |
c489ee29 TM |
2257 | switch (status) { |
2258 | case 0: | |
2259 | case -NFS4ERR_BADSESSION: | |
2260 | case -NFS4ERR_DEADSESSION: | |
2261 | break; | |
2262 | case -NFS4ERR_BACK_CHAN_BUSY: | |
2263 | case -NFS4ERR_DELAY: | |
2264 | set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); | |
2265 | status = 0; | |
2266 | ssleep(1); | |
2267 | goto out; | |
2268 | default: | |
f455848a | 2269 | status = nfs4_recovery_handle_error(clp, status); |
c3fad1b1 AA |
2270 | goto out; |
2271 | } | |
2272 | ||
2273 | memset(clp->cl_session->sess_id.data, 0, NFS4_MAX_SESSIONID_LEN); | |
848f5bda | 2274 | status = nfs4_proc_create_session(clp, cred); |
41f54a55 | 2275 | if (status) { |
cc0a9843 TM |
2276 | dprintk("%s: session reset failed with status %d for server %s!\n", |
2277 | __func__, status, clp->cl_hostname); | |
f2c1b510 | 2278 | status = nfs4_handle_reclaim_lease_error(clp, status); |
41f54a55 AA |
2279 | goto out; |
2280 | } | |
bda197f5 | 2281 | nfs41_finish_session_reset(clp); |
cc0a9843 TM |
2282 | dprintk("%s: session reset was successful for server %s!\n", |
2283 | __func__, clp->cl_hostname); | |
41f54a55 | 2284 | out: |
848f5bda TM |
2285 | if (cred) |
2286 | put_rpccred(cred); | |
c3fad1b1 AA |
2287 | return status; |
2288 | } | |
76db6d95 | 2289 | |
a9e64442 WAA |
2290 | static int nfs4_bind_conn_to_session(struct nfs_client *clp) |
2291 | { | |
2cf047c9 TM |
2292 | struct rpc_cred *cred; |
2293 | int ret; | |
2294 | ||
1a47e7a6 TM |
2295 | if (!nfs4_has_session(clp)) |
2296 | return 0; | |
43ac544c | 2297 | nfs4_begin_drain_session(clp); |
73d8bde5 | 2298 | cred = nfs4_get_clid_cred(clp); |
2cf047c9 TM |
2299 | ret = nfs4_proc_bind_conn_to_session(clp, cred); |
2300 | if (cred) | |
2301 | put_rpccred(cred); | |
43ac544c | 2302 | clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); |
bf674c82 TM |
2303 | switch (ret) { |
2304 | case 0: | |
cc0a9843 TM |
2305 | dprintk("%s: bind_conn_to_session was successful for server %s!\n", |
2306 | __func__, clp->cl_hostname); | |
bf674c82 TM |
2307 | break; |
2308 | case -NFS4ERR_DELAY: | |
2309 | ssleep(1); | |
2310 | set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); | |
2311 | break; | |
2312 | default: | |
2313 | return nfs4_recovery_handle_error(clp, ret); | |
2314 | } | |
2315 | return 0; | |
a9e64442 | 2316 | } |
76db6d95 | 2317 | #else /* CONFIG_NFS_V4_1 */ |
c3fad1b1 | 2318 | static int nfs4_reset_session(struct nfs_client *clp) { return 0; } |
a9e64442 WAA |
2319 | |
2320 | static int nfs4_bind_conn_to_session(struct nfs_client *clp) | |
2321 | { | |
2322 | return 0; | |
2323 | } | |
76db6d95 AA |
2324 | #endif /* CONFIG_NFS_V4_1 */ |
2325 | ||
e005e804 | 2326 | static void nfs4_state_manager(struct nfs_client *clp) |
02860014 | 2327 | { |
02860014 | 2328 | int status = 0; |
8ed27d4f | 2329 | const char *section = "", *section_sep = ""; |
02860014 | 2330 | |
02860014 | 2331 | /* Ensure exclusive access to NFSv4 state */ |
47c2199b | 2332 | do { |
2c820d9a | 2333 | if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) { |
8ed27d4f | 2334 | section = "purge state"; |
b42353ff | 2335 | status = nfs4_purge_lease(clp); |
2a6ee6aa TM |
2336 | if (status < 0) |
2337 | goto out_error; | |
b42353ff | 2338 | continue; |
2c820d9a CL |
2339 | } |
2340 | ||
b42353ff | 2341 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) { |
8ed27d4f | 2342 | section = "lease expired"; |
b79a4a1b TM |
2343 | /* We're going to have to re-establish a clientid */ |
2344 | status = nfs4_reclaim_lease(clp); | |
2a6ee6aa | 2345 | if (status < 0) |
b79a4a1b | 2346 | goto out_error; |
b42353ff | 2347 | continue; |
e598d843 TM |
2348 | } |
2349 | ||
c3fad1b1 | 2350 | /* Initialize or reset the session */ |
1a47e7a6 | 2351 | if (test_and_clear_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state)) { |
8ed27d4f | 2352 | section = "reset session"; |
4d643d1d | 2353 | status = nfs4_reset_session(clp); |
b6d408ba TM |
2354 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
2355 | continue; | |
2356 | if (status < 0) | |
76db6d95 | 2357 | goto out_error; |
76db6d95 | 2358 | } |
b6d408ba | 2359 | |
a9e64442 WAA |
2360 | /* Send BIND_CONN_TO_SESSION */ |
2361 | if (test_and_clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION, | |
1a47e7a6 | 2362 | &clp->cl_state)) { |
8ed27d4f | 2363 | section = "bind conn to session"; |
a9e64442 WAA |
2364 | status = nfs4_bind_conn_to_session(clp); |
2365 | if (status < 0) | |
2366 | goto out_error; | |
bf674c82 | 2367 | continue; |
a9e64442 WAA |
2368 | } |
2369 | ||
5df904ae TM |
2370 | if (test_and_clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state)) { |
2371 | section = "check lease"; | |
2372 | status = nfs4_check_lease(clp); | |
2373 | if (status < 0) | |
2374 | goto out_error; | |
8faaa6d5 | 2375 | continue; |
c9fdeb28 CL |
2376 | } |
2377 | ||
2378 | if (test_and_clear_bit(NFS4CLNT_MOVED, &clp->cl_state)) { | |
2379 | section = "migration"; | |
2380 | status = nfs4_handle_migration(clp); | |
2381 | if (status < 0) | |
2382 | goto out_error; | |
5df904ae TM |
2383 | } |
2384 | ||
b7f7a66e CL |
2385 | if (test_and_clear_bit(NFS4CLNT_LEASE_MOVED, &clp->cl_state)) { |
2386 | section = "lease moved"; | |
2387 | status = nfs4_handle_lease_moved(clp); | |
2388 | if (status < 0) | |
2389 | goto out_error; | |
2390 | } | |
2391 | ||
b79a4a1b | 2392 | /* First recover reboot state... */ |
e345e88a | 2393 | if (test_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) { |
8ed27d4f | 2394 | section = "reclaim reboot"; |
591d71cb | 2395 | status = nfs4_do_reclaim(clp, |
c48f4f35 | 2396 | clp->cl_mvops->reboot_recovery_ops); |
df817ba3 | 2397 | if (status == -EAGAIN) |
b6d408ba TM |
2398 | continue; |
2399 | if (status < 0) | |
2400 | goto out_error; | |
df817ba3 | 2401 | nfs4_state_end_reclaim_reboot(clp); |
02860014 TM |
2402 | } |
2403 | ||
b79a4a1b TM |
2404 | /* Now recover expired state... */ |
2405 | if (test_and_clear_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) { | |
8ed27d4f | 2406 | section = "reclaim nograce"; |
591d71cb | 2407 | status = nfs4_do_reclaim(clp, |
c48f4f35 | 2408 | clp->cl_mvops->nograce_recovery_ops); |
df817ba3 | 2409 | if (status == -EAGAIN) |
b6d408ba TM |
2410 | continue; |
2411 | if (status < 0) | |
b79a4a1b | 2412 | goto out_error; |
1da177e4 | 2413 | } |
707fb4b3 | 2414 | |
5601a00d | 2415 | nfs4_end_drain_session(clp); |
707fb4b3 TM |
2416 | if (test_and_clear_bit(NFS4CLNT_DELEGRETURN, &clp->cl_state)) { |
2417 | nfs_client_return_marked_delegations(clp); | |
2418 | continue; | |
2419 | } | |
e005e804 TM |
2420 | |
2421 | nfs4_clear_state_manager_bit(clp); | |
f3c76491 TM |
2422 | /* Did we race with an attempt to give us more work? */ |
2423 | if (clp->cl_state == 0) | |
2424 | break; | |
2425 | if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) != 0) | |
2426 | break; | |
47c2199b | 2427 | } while (atomic_read(&clp->cl_count) > 1); |
e005e804 | 2428 | return; |
1da177e4 | 2429 | out_error: |
8ed27d4f WAA |
2430 | if (strlen(section)) |
2431 | section_sep = ": "; | |
2432 | pr_warn_ratelimited("NFS: state manager%s%s failed on NFSv4 server %s" | |
2433 | " with error %d\n", section_sep, section, | |
2434 | clp->cl_hostname, -status); | |
ffe5a830 | 2435 | ssleep(1); |
5601a00d | 2436 | nfs4_end_drain_session(clp); |
e005e804 TM |
2437 | nfs4_clear_state_manager_bit(clp); |
2438 | } | |
2439 | ||
2440 | static int nfs4_run_state_manager(void *ptr) | |
2441 | { | |
2442 | struct nfs_client *clp = ptr; | |
2443 | ||
2444 | allow_signal(SIGKILL); | |
2445 | nfs4_state_manager(clp); | |
2446 | nfs_put_client(clp); | |
2447 | module_put_and_exit(0); | |
2448 | return 0; | |
1da177e4 LT |
2449 | } |
2450 | ||
2451 | /* | |
2452 | * Local variables: | |
2453 | * c-basic-offset: 8 | |
2454 | * End: | |
2455 | */ |