Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * fs/nfs/nfs4state.c | |
3 | * | |
4 | * Client-side XDR for NFSv4. | |
5 | * | |
6 | * Copyright (c) 2002 The Regents of the University of Michigan. | |
7 | * All rights reserved. | |
8 | * | |
9 | * Kendrick Smith <kmsmith@umich.edu> | |
10 | * | |
11 | * Redistribution and use in source and binary forms, with or without | |
12 | * modification, are permitted provided that the following conditions | |
13 | * are met: | |
14 | * | |
15 | * 1. Redistributions of source code must retain the above copyright | |
16 | * notice, this list of conditions and the following disclaimer. | |
17 | * 2. Redistributions in binary form must reproduce the above copyright | |
18 | * notice, this list of conditions and the following disclaimer in the | |
19 | * documentation and/or other materials provided with the distribution. | |
20 | * 3. Neither the name of the University nor the names of its | |
21 | * contributors may be used to endorse or promote products derived | |
22 | * from this software without specific prior written permission. | |
23 | * | |
24 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
25 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
26 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
27 | * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
28 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
29 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
30 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR | |
31 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
32 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
33 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
34 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
35 | * | |
36 | * Implementation of the NFSv4 state model. For the time being, | |
37 | * this is minimal, but will be made much more complex in a | |
38 | * subsequent patch. | |
39 | */ | |
40 | ||
6f43ddcc | 41 | #include <linux/kernel.h> |
1da177e4 | 42 | #include <linux/slab.h> |
b89f4321 | 43 | #include <linux/fs.h> |
1da177e4 LT |
44 | #include <linux/nfs_fs.h> |
45 | #include <linux/nfs_idmap.h> | |
5043e900 TM |
46 | #include <linux/kthread.h> |
47 | #include <linux/module.h> | |
9f958ab8 | 48 | #include <linux/random.h> |
8c7597f6 | 49 | #include <linux/ratelimit.h> |
1da177e4 LT |
50 | #include <linux/workqueue.h> |
51 | #include <linux/bitops.h> | |
0aaaf5c4 | 52 | #include <linux/jiffies.h> |
1da177e4 | 53 | |
05f4c350 CL |
54 | #include <linux/sunrpc/clnt.h> |
55 | ||
4ce79717 | 56 | #include "nfs4_fs.h" |
1da177e4 LT |
57 | #include "callback.h" |
58 | #include "delegation.h" | |
24c8dbbb | 59 | #include "internal.h" |
974cec8c | 60 | #include "pnfs.h" |
bbe0a3aa | 61 | #include "netns.h" |
1da177e4 | 62 | |
e3c0fb7e CL |
63 | #define NFSDBG_FACILITY NFSDBG_STATE |
64 | ||
1da177e4 LT |
65 | #define OPENOWNER_POOL_SIZE 8 |
66 | ||
4ce79717 | 67 | const nfs4_stateid zero_stateid; |
05f4c350 | 68 | static DEFINE_MUTEX(nfs_clid_init_mutex); |
1da177e4 LT |
69 | static LIST_HEAD(nfs4_clientid_list); |
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); | |
139 | switch (status) { | |
140 | case -NFS4ERR_STALE_CLIENTID: | |
141 | set_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); | |
142 | case 0: | |
143 | /* Sustain the lease, even if it's empty. If the clientid4 | |
144 | * goes stale it's of no use for trunking discovery. */ | |
145 | nfs4_schedule_state_renewal(*result); | |
146 | break; | |
147 | } | |
148 | ||
149 | out: | |
150 | return status; | |
151 | } | |
152 | ||
a7b72103 | 153 | struct rpc_cred *nfs4_get_machine_cred_locked(struct nfs_client *clp) |
a2b2bb88 TM |
154 | { |
155 | struct rpc_cred *cred = NULL; | |
156 | ||
a2b2bb88 TM |
157 | if (clp->cl_machine_cred != NULL) |
158 | cred = get_rpccred(clp->cl_machine_cred); | |
a2b2bb88 TM |
159 | return cred; |
160 | } | |
161 | ||
162 | static void nfs4_clear_machine_cred(struct nfs_client *clp) | |
163 | { | |
164 | struct rpc_cred *cred; | |
165 | ||
166 | spin_lock(&clp->cl_lock); | |
167 | cred = clp->cl_machine_cred; | |
168 | clp->cl_machine_cred = NULL; | |
169 | spin_unlock(&clp->cl_lock); | |
170 | if (cred != NULL) | |
171 | put_rpccred(cred); | |
172 | } | |
173 | ||
24d292b8 CL |
174 | static struct rpc_cred * |
175 | nfs4_get_renew_cred_server_locked(struct nfs_server *server) | |
b4454fe1 | 176 | { |
24d292b8 | 177 | struct rpc_cred *cred = NULL; |
b4454fe1 | 178 | struct nfs4_state_owner *sp; |
9f958ab8 | 179 | struct rb_node *pos; |
b4454fe1 | 180 | |
24d292b8 CL |
181 | for (pos = rb_first(&server->state_owners); |
182 | pos != NULL; | |
183 | pos = rb_next(pos)) { | |
184 | sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); | |
b4454fe1 TM |
185 | if (list_empty(&sp->so_states)) |
186 | continue; | |
187 | cred = get_rpccred(sp->so_cred); | |
188 | break; | |
189 | } | |
190 | return cred; | |
191 | } | |
192 | ||
24d292b8 CL |
193 | /** |
194 | * nfs4_get_renew_cred_locked - Acquire credential for a renew operation | |
195 | * @clp: client state handle | |
196 | * | |
197 | * Returns an rpc_cred with reference count bumped, or NULL. | |
198 | * Caller must hold clp->cl_lock. | |
199 | */ | |
200 | struct rpc_cred *nfs4_get_renew_cred_locked(struct nfs_client *clp) | |
201 | { | |
202 | struct rpc_cred *cred = NULL; | |
203 | struct nfs_server *server; | |
204 | ||
e49a29bd SP |
205 | /* Use machine credentials if available */ |
206 | cred = nfs4_get_machine_cred_locked(clp); | |
207 | if (cred != NULL) | |
208 | goto out; | |
209 | ||
24d292b8 CL |
210 | rcu_read_lock(); |
211 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { | |
212 | cred = nfs4_get_renew_cred_server_locked(server); | |
213 | if (cred != NULL) | |
214 | break; | |
215 | } | |
216 | rcu_read_unlock(); | |
e49a29bd SP |
217 | |
218 | out: | |
24d292b8 CL |
219 | return cred; |
220 | } | |
221 | ||
b4b82607 AA |
222 | #if defined(CONFIG_NFS_V4_1) |
223 | ||
9430fb6b RL |
224 | static int nfs41_setup_state_renewal(struct nfs_client *clp) |
225 | { | |
226 | int status; | |
227 | struct nfs_fsinfo fsinfo; | |
228 | ||
d6fb79d4 AA |
229 | if (!test_bit(NFS_CS_CHECK_LEASE_TIME, &clp->cl_res_state)) { |
230 | nfs4_schedule_state_renewal(clp); | |
231 | return 0; | |
232 | } | |
233 | ||
9430fb6b RL |
234 | status = nfs4_proc_get_lease_time(clp, &fsinfo); |
235 | if (status == 0) { | |
236 | /* Update lease time and schedule renewal */ | |
237 | spin_lock(&clp->cl_lock); | |
238 | clp->cl_lease_time = fsinfo.lease_time * HZ; | |
239 | clp->cl_last_renewal = jiffies; | |
240 | spin_unlock(&clp->cl_lock); | |
241 | ||
242 | nfs4_schedule_state_renewal(clp); | |
243 | } | |
244 | ||
245 | return status; | |
246 | } | |
247 | ||
42acd021 AA |
248 | /* |
249 | * Back channel returns NFS4ERR_DELAY for new requests when | |
250 | * NFS4_SESSION_DRAINING is set so there is no work to be done when draining | |
251 | * is ended. | |
252 | */ | |
5601a00d | 253 | static void nfs4_end_drain_session(struct nfs_client *clp) |
9dfdf404 | 254 | { |
5601a00d | 255 | struct nfs4_session *ses = clp->cl_session; |
961a828d | 256 | struct nfs4_slot_table *tbl; |
689cf5c1 AB |
257 | int max_slots; |
258 | ||
a2118c33 TM |
259 | if (ses == NULL) |
260 | return; | |
961a828d | 261 | tbl = &ses->fc_slot_table; |
a2118c33 | 262 | if (test_and_clear_bit(NFS4_SESSION_DRAINING, &ses->session_state)) { |
961a828d TM |
263 | spin_lock(&tbl->slot_tbl_lock); |
264 | max_slots = tbl->max_slots; | |
689cf5c1 | 265 | while (max_slots--) { |
961a828d TM |
266 | if (rpc_wake_up_first(&tbl->slot_tbl_waitq, |
267 | nfs4_set_task_privileged, | |
268 | NULL) == NULL) | |
689cf5c1 | 269 | break; |
689cf5c1 | 270 | } |
961a828d | 271 | spin_unlock(&tbl->slot_tbl_lock); |
689cf5c1 | 272 | } |
9dfdf404 RL |
273 | } |
274 | ||
42acd021 | 275 | static int nfs4_wait_on_slot_tbl(struct nfs4_slot_table *tbl) |
9dfdf404 | 276 | { |
9dfdf404 | 277 | spin_lock(&tbl->slot_tbl_lock); |
b6bf6e7d | 278 | if (tbl->highest_used_slotid != NFS4_NO_SLOT) { |
42acd021 | 279 | INIT_COMPLETION(tbl->complete); |
9dfdf404 | 280 | spin_unlock(&tbl->slot_tbl_lock); |
42acd021 | 281 | return wait_for_completion_interruptible(&tbl->complete); |
9dfdf404 RL |
282 | } |
283 | spin_unlock(&tbl->slot_tbl_lock); | |
284 | return 0; | |
285 | } | |
286 | ||
42acd021 AA |
287 | static int nfs4_begin_drain_session(struct nfs_client *clp) |
288 | { | |
289 | struct nfs4_session *ses = clp->cl_session; | |
290 | int ret = 0; | |
291 | ||
292 | set_bit(NFS4_SESSION_DRAINING, &ses->session_state); | |
293 | /* back channel */ | |
294 | ret = nfs4_wait_on_slot_tbl(&ses->bc_slot_table); | |
295 | if (ret) | |
296 | return ret; | |
297 | /* fore channel */ | |
298 | return nfs4_wait_on_slot_tbl(&ses->fc_slot_table); | |
299 | } | |
300 | ||
bda197f5 TM |
301 | static void nfs41_finish_session_reset(struct nfs_client *clp) |
302 | { | |
303 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); | |
304 | clear_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); | |
305 | /* create_session negotiated new slot table */ | |
306 | clear_bit(NFS4CLNT_RECALL_SLOT, &clp->cl_state); | |
307 | clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); | |
308 | nfs41_setup_state_renewal(clp); | |
309 | } | |
310 | ||
4d643d1d AA |
311 | int nfs41_init_clientid(struct nfs_client *clp, struct rpc_cred *cred) |
312 | { | |
313 | int status; | |
314 | ||
fd954ae1 TM |
315 | if (test_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state)) |
316 | goto do_confirm; | |
38045412 | 317 | nfs4_begin_drain_session(clp); |
4d643d1d | 318 | status = nfs4_proc_exchange_id(clp, cred); |
9430fb6b RL |
319 | if (status != 0) |
320 | goto out; | |
fd954ae1 TM |
321 | set_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
322 | do_confirm: | |
848f5bda | 323 | status = nfs4_proc_create_session(clp, cred); |
9430fb6b RL |
324 | if (status != 0) |
325 | goto out; | |
bda197f5 | 326 | nfs41_finish_session_reset(clp); |
9430fb6b RL |
327 | nfs_mark_client_ready(clp, NFS_CS_READY); |
328 | out: | |
4d643d1d AA |
329 | return status; |
330 | } | |
331 | ||
05f4c350 CL |
332 | /** |
333 | * nfs41_discover_server_trunking - Detect server IP address trunking (mv1) | |
334 | * | |
335 | * @clp: nfs_client under test | |
336 | * @result: OUT: found nfs_client, or clp | |
337 | * @cred: credential to use for trunking test | |
338 | * | |
339 | * Returns NFS4_OK, a negative errno, or a negative NFS4ERR status. | |
340 | * If NFS4_OK is returned, an nfs_client pointer is planted in | |
341 | * "result". | |
342 | * | |
343 | * Note: The returned client may not yet be marked ready. | |
344 | */ | |
345 | int nfs41_discover_server_trunking(struct nfs_client *clp, | |
346 | struct nfs_client **result, | |
347 | struct rpc_cred *cred) | |
348 | { | |
349 | int status; | |
350 | ||
351 | status = nfs4_proc_exchange_id(clp, cred); | |
352 | if (status != NFS4_OK) | |
353 | return status; | |
fd483570 | 354 | set_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
05f4c350 CL |
355 | |
356 | return nfs41_walk_client_list(clp, result, cred); | |
357 | } | |
358 | ||
b4b82607 AA |
359 | struct rpc_cred *nfs4_get_exchange_id_cred(struct nfs_client *clp) |
360 | { | |
361 | struct rpc_cred *cred; | |
362 | ||
363 | spin_lock(&clp->cl_lock); | |
364 | cred = nfs4_get_machine_cred_locked(clp); | |
365 | spin_unlock(&clp->cl_lock); | |
366 | return cred; | |
367 | } | |
368 | ||
369 | #endif /* CONFIG_NFS_V4_1 */ | |
370 | ||
24d292b8 CL |
371 | static struct rpc_cred * |
372 | nfs4_get_setclientid_cred_server(struct nfs_server *server) | |
286d7d6a | 373 | { |
24d292b8 CL |
374 | struct nfs_client *clp = server->nfs_client; |
375 | struct rpc_cred *cred = NULL; | |
286d7d6a | 376 | struct nfs4_state_owner *sp; |
9f958ab8 | 377 | struct rb_node *pos; |
24d292b8 CL |
378 | |
379 | spin_lock(&clp->cl_lock); | |
380 | pos = rb_first(&server->state_owners); | |
381 | if (pos != NULL) { | |
382 | sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); | |
383 | cred = get_rpccred(sp->so_cred); | |
384 | } | |
385 | spin_unlock(&clp->cl_lock); | |
386 | return cred; | |
387 | } | |
388 | ||
389 | /** | |
390 | * nfs4_get_setclientid_cred - Acquire credential for a setclientid operation | |
391 | * @clp: client state handle | |
392 | * | |
393 | * Returns an rpc_cred with reference count bumped, or NULL. | |
394 | */ | |
395 | struct rpc_cred *nfs4_get_setclientid_cred(struct nfs_client *clp) | |
396 | { | |
397 | struct nfs_server *server; | |
a2b2bb88 | 398 | struct rpc_cred *cred; |
286d7d6a | 399 | |
6dc9d57a TM |
400 | spin_lock(&clp->cl_lock); |
401 | cred = nfs4_get_machine_cred_locked(clp); | |
24d292b8 | 402 | spin_unlock(&clp->cl_lock); |
a2b2bb88 TM |
403 | if (cred != NULL) |
404 | goto out; | |
24d292b8 CL |
405 | |
406 | rcu_read_lock(); | |
407 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { | |
408 | cred = nfs4_get_setclientid_cred_server(server); | |
409 | if (cred != NULL) | |
410 | break; | |
286d7d6a | 411 | } |
24d292b8 CL |
412 | rcu_read_unlock(); |
413 | ||
a2b2bb88 TM |
414 | out: |
415 | return cred; | |
286d7d6a TM |
416 | } |
417 | ||
1da177e4 | 418 | static struct nfs4_state_owner * |
24d292b8 | 419 | nfs4_find_state_owner_locked(struct nfs_server *server, struct rpc_cred *cred) |
1da177e4 | 420 | { |
24d292b8 | 421 | struct rb_node **p = &server->state_owners.rb_node, |
9f958ab8 | 422 | *parent = NULL; |
414adf14 | 423 | struct nfs4_state_owner *sp; |
1da177e4 | 424 | |
9f958ab8 TM |
425 | while (*p != NULL) { |
426 | parent = *p; | |
24d292b8 | 427 | sp = rb_entry(parent, struct nfs4_state_owner, so_server_node); |
9f958ab8 TM |
428 | |
429 | if (cred < sp->so_cred) | |
430 | p = &parent->rb_left; | |
431 | else if (cred > sp->so_cred) | |
432 | p = &parent->rb_right; | |
433 | else { | |
0aaaf5c4 CL |
434 | if (!list_empty(&sp->so_lru)) |
435 | list_del_init(&sp->so_lru); | |
9f958ab8 | 436 | atomic_inc(&sp->so_count); |
414adf14 | 437 | return sp; |
9f958ab8 | 438 | } |
1da177e4 | 439 | } |
414adf14 | 440 | return NULL; |
1da177e4 LT |
441 | } |
442 | ||
9f958ab8 | 443 | static struct nfs4_state_owner * |
24d292b8 | 444 | nfs4_insert_state_owner_locked(struct nfs4_state_owner *new) |
9f958ab8 | 445 | { |
24d292b8 CL |
446 | struct nfs_server *server = new->so_server; |
447 | struct rb_node **p = &server->state_owners.rb_node, | |
9f958ab8 TM |
448 | *parent = NULL; |
449 | struct nfs4_state_owner *sp; | |
9157c31d | 450 | int err; |
9f958ab8 TM |
451 | |
452 | while (*p != NULL) { | |
453 | parent = *p; | |
24d292b8 | 454 | sp = rb_entry(parent, struct nfs4_state_owner, so_server_node); |
9f958ab8 TM |
455 | |
456 | if (new->so_cred < sp->so_cred) | |
457 | p = &parent->rb_left; | |
458 | else if (new->so_cred > sp->so_cred) | |
459 | p = &parent->rb_right; | |
460 | else { | |
0aaaf5c4 CL |
461 | if (!list_empty(&sp->so_lru)) |
462 | list_del_init(&sp->so_lru); | |
9f958ab8 TM |
463 | atomic_inc(&sp->so_count); |
464 | return sp; | |
465 | } | |
466 | } | |
48c22eb2 | 467 | err = ida_get_new(&server->openowner_id, &new->so_seqid.owner_id); |
9157c31d TM |
468 | if (err) |
469 | return ERR_PTR(err); | |
24d292b8 CL |
470 | rb_link_node(&new->so_server_node, parent, p); |
471 | rb_insert_color(&new->so_server_node, &server->state_owners); | |
9f958ab8 TM |
472 | return new; |
473 | } | |
474 | ||
475 | static void | |
24d292b8 | 476 | nfs4_remove_state_owner_locked(struct nfs4_state_owner *sp) |
9f958ab8 | 477 | { |
24d292b8 CL |
478 | struct nfs_server *server = sp->so_server; |
479 | ||
480 | if (!RB_EMPTY_NODE(&sp->so_server_node)) | |
481 | rb_erase(&sp->so_server_node, &server->state_owners); | |
48c22eb2 | 482 | ida_remove(&server->openowner_id, sp->so_seqid.owner_id); |
9f958ab8 TM |
483 | } |
484 | ||
7ba127ab TM |
485 | static void |
486 | nfs4_init_seqid_counter(struct nfs_seqid_counter *sc) | |
487 | { | |
95b72eb0 | 488 | sc->create_time = ktime_get(); |
7ba127ab TM |
489 | sc->flags = 0; |
490 | sc->counter = 0; | |
491 | spin_lock_init(&sc->lock); | |
492 | INIT_LIST_HEAD(&sc->list); | |
493 | rpc_init_wait_queue(&sc->wait, "Seqid_waitqueue"); | |
494 | } | |
495 | ||
496 | static void | |
497 | nfs4_destroy_seqid_counter(struct nfs_seqid_counter *sc) | |
498 | { | |
499 | rpc_destroy_wait_queue(&sc->wait); | |
500 | } | |
501 | ||
1da177e4 LT |
502 | /* |
503 | * nfs4_alloc_state_owner(): this is called on the OPEN or CREATE path to | |
504 | * create a new state_owner. | |
505 | * | |
506 | */ | |
507 | static struct nfs4_state_owner * | |
d1e284d5 TM |
508 | nfs4_alloc_state_owner(struct nfs_server *server, |
509 | struct rpc_cred *cred, | |
510 | gfp_t gfp_flags) | |
1da177e4 LT |
511 | { |
512 | struct nfs4_state_owner *sp; | |
513 | ||
d1e284d5 | 514 | sp = kzalloc(sizeof(*sp), gfp_flags); |
1da177e4 LT |
515 | if (!sp) |
516 | return NULL; | |
d1e284d5 TM |
517 | sp->so_server = server; |
518 | sp->so_cred = get_rpccred(cred); | |
ec073428 | 519 | spin_lock_init(&sp->so_lock); |
1da177e4 | 520 | INIT_LIST_HEAD(&sp->so_states); |
7ba127ab | 521 | nfs4_init_seqid_counter(&sp->so_seqid); |
1da177e4 | 522 | atomic_set(&sp->so_count, 1); |
0aaaf5c4 | 523 | INIT_LIST_HEAD(&sp->so_lru); |
1da177e4 LT |
524 | return sp; |
525 | } | |
526 | ||
1d2e88e7 | 527 | static void |
1da177e4 LT |
528 | nfs4_drop_state_owner(struct nfs4_state_owner *sp) |
529 | { | |
c77365c9 TM |
530 | struct rb_node *rb_node = &sp->so_server_node; |
531 | ||
532 | if (!RB_EMPTY_NODE(rb_node)) { | |
24d292b8 CL |
533 | struct nfs_server *server = sp->so_server; |
534 | struct nfs_client *clp = server->nfs_client; | |
9f958ab8 TM |
535 | |
536 | spin_lock(&clp->cl_lock); | |
c77365c9 TM |
537 | if (!RB_EMPTY_NODE(rb_node)) { |
538 | rb_erase(rb_node, &server->state_owners); | |
539 | RB_CLEAR_NODE(rb_node); | |
540 | } | |
9f958ab8 TM |
541 | spin_unlock(&clp->cl_lock); |
542 | } | |
1da177e4 LT |
543 | } |
544 | ||
0aaaf5c4 CL |
545 | static void nfs4_free_state_owner(struct nfs4_state_owner *sp) |
546 | { | |
7ba127ab | 547 | nfs4_destroy_seqid_counter(&sp->so_seqid); |
0aaaf5c4 CL |
548 | put_rpccred(sp->so_cred); |
549 | kfree(sp); | |
550 | } | |
551 | ||
552 | static void nfs4_gc_state_owners(struct nfs_server *server) | |
553 | { | |
554 | struct nfs_client *clp = server->nfs_client; | |
555 | struct nfs4_state_owner *sp, *tmp; | |
556 | unsigned long time_min, time_max; | |
557 | LIST_HEAD(doomed); | |
558 | ||
559 | spin_lock(&clp->cl_lock); | |
560 | time_max = jiffies; | |
561 | time_min = (long)time_max - (long)clp->cl_lease_time; | |
562 | list_for_each_entry_safe(sp, tmp, &server->state_owners_lru, so_lru) { | |
563 | /* NB: LRU is sorted so that oldest is at the head */ | |
564 | if (time_in_range(sp->so_expires, time_min, time_max)) | |
565 | break; | |
566 | list_move(&sp->so_lru, &doomed); | |
567 | nfs4_remove_state_owner_locked(sp); | |
568 | } | |
569 | spin_unlock(&clp->cl_lock); | |
570 | ||
571 | list_for_each_entry_safe(sp, tmp, &doomed, so_lru) { | |
572 | list_del(&sp->so_lru); | |
573 | nfs4_free_state_owner(sp); | |
574 | } | |
575 | } | |
576 | ||
24d292b8 CL |
577 | /** |
578 | * nfs4_get_state_owner - Look up a state owner given a credential | |
579 | * @server: nfs_server to search | |
580 | * @cred: RPC credential to match | |
581 | * | |
582 | * Returns a pointer to an instantiated nfs4_state_owner struct, or NULL. | |
583 | */ | |
584 | struct nfs4_state_owner *nfs4_get_state_owner(struct nfs_server *server, | |
d1e284d5 TM |
585 | struct rpc_cred *cred, |
586 | gfp_t gfp_flags) | |
1da177e4 | 587 | { |
7539bbab | 588 | struct nfs_client *clp = server->nfs_client; |
1da177e4 LT |
589 | struct nfs4_state_owner *sp, *new; |
590 | ||
1da177e4 | 591 | spin_lock(&clp->cl_lock); |
24d292b8 | 592 | sp = nfs4_find_state_owner_locked(server, cred); |
1da177e4 | 593 | spin_unlock(&clp->cl_lock); |
1da177e4 | 594 | if (sp != NULL) |
0aaaf5c4 | 595 | goto out; |
d1e284d5 | 596 | new = nfs4_alloc_state_owner(server, cred, gfp_flags); |
9f958ab8 | 597 | if (new == NULL) |
0aaaf5c4 | 598 | goto out; |
9157c31d TM |
599 | do { |
600 | if (ida_pre_get(&server->openowner_id, gfp_flags) == 0) | |
601 | break; | |
602 | spin_lock(&clp->cl_lock); | |
603 | sp = nfs4_insert_state_owner_locked(new); | |
604 | spin_unlock(&clp->cl_lock); | |
605 | } while (sp == ERR_PTR(-EAGAIN)); | |
d1e284d5 TM |
606 | if (sp != new) |
607 | nfs4_free_state_owner(new); | |
0aaaf5c4 CL |
608 | out: |
609 | nfs4_gc_state_owners(server); | |
9f958ab8 | 610 | return sp; |
1da177e4 LT |
611 | } |
612 | ||
24d292b8 CL |
613 | /** |
614 | * nfs4_put_state_owner - Release a nfs4_state_owner | |
615 | * @sp: state owner data to release | |
7bf97bc2 TM |
616 | * |
617 | * Note that we keep released state owners on an LRU | |
618 | * list. | |
619 | * This caches valid state owners so that they can be | |
620 | * reused, to avoid the OPEN_CONFIRM on minor version 0. | |
621 | * It also pins the uniquifier of dropped state owners for | |
622 | * a while, to ensure that those state owner names are | |
623 | * never reused. | |
24d292b8 | 624 | */ |
1da177e4 LT |
625 | void nfs4_put_state_owner(struct nfs4_state_owner *sp) |
626 | { | |
0aaaf5c4 CL |
627 | struct nfs_server *server = sp->so_server; |
628 | struct nfs_client *clp = server->nfs_client; | |
1da177e4 LT |
629 | |
630 | if (!atomic_dec_and_lock(&sp->so_count, &clp->cl_lock)) | |
631 | return; | |
0aaaf5c4 | 632 | |
7bf97bc2 TM |
633 | sp->so_expires = jiffies; |
634 | list_add_tail(&sp->so_lru, &server->state_owners_lru); | |
635 | spin_unlock(&clp->cl_lock); | |
0aaaf5c4 CL |
636 | } |
637 | ||
638 | /** | |
639 | * nfs4_purge_state_owners - Release all cached state owners | |
640 | * @server: nfs_server with cached state owners to release | |
641 | * | |
642 | * Called at umount time. Remaining state owners will be on | |
643 | * the LRU with ref count of zero. | |
644 | */ | |
645 | void nfs4_purge_state_owners(struct nfs_server *server) | |
646 | { | |
647 | struct nfs_client *clp = server->nfs_client; | |
648 | struct nfs4_state_owner *sp, *tmp; | |
649 | LIST_HEAD(doomed); | |
650 | ||
651 | spin_lock(&clp->cl_lock); | |
652 | list_for_each_entry_safe(sp, tmp, &server->state_owners_lru, so_lru) { | |
653 | list_move(&sp->so_lru, &doomed); | |
654 | nfs4_remove_state_owner_locked(sp); | |
655 | } | |
1da177e4 | 656 | spin_unlock(&clp->cl_lock); |
0aaaf5c4 CL |
657 | |
658 | list_for_each_entry_safe(sp, tmp, &doomed, so_lru) { | |
659 | list_del(&sp->so_lru); | |
660 | nfs4_free_state_owner(sp); | |
661 | } | |
1da177e4 LT |
662 | } |
663 | ||
664 | static struct nfs4_state * | |
665 | nfs4_alloc_open_state(void) | |
666 | { | |
667 | struct nfs4_state *state; | |
668 | ||
8535b2be | 669 | state = kzalloc(sizeof(*state), GFP_NOFS); |
1da177e4 LT |
670 | if (!state) |
671 | return NULL; | |
1da177e4 LT |
672 | atomic_set(&state->count, 1); |
673 | INIT_LIST_HEAD(&state->lock_states); | |
8d0a8a9d | 674 | spin_lock_init(&state->state_lock); |
8bda4e4c | 675 | seqlock_init(&state->seqlock); |
1da177e4 LT |
676 | return state; |
677 | } | |
678 | ||
4cecb76f | 679 | void |
dc0b027d | 680 | nfs4_state_set_mode_locked(struct nfs4_state *state, fmode_t fmode) |
4cecb76f | 681 | { |
dc0b027d | 682 | if (state->state == fmode) |
4cecb76f TM |
683 | return; |
684 | /* NB! List reordering - see the reclaim code for why. */ | |
dc0b027d TM |
685 | if ((fmode & FMODE_WRITE) != (state->state & FMODE_WRITE)) { |
686 | if (fmode & FMODE_WRITE) | |
4cecb76f TM |
687 | list_move(&state->open_states, &state->owner->so_states); |
688 | else | |
689 | list_move_tail(&state->open_states, &state->owner->so_states); | |
690 | } | |
dc0b027d | 691 | state->state = fmode; |
4cecb76f TM |
692 | } |
693 | ||
1da177e4 LT |
694 | static struct nfs4_state * |
695 | __nfs4_find_state_byowner(struct inode *inode, struct nfs4_state_owner *owner) | |
696 | { | |
697 | struct nfs_inode *nfsi = NFS_I(inode); | |
698 | struct nfs4_state *state; | |
699 | ||
700 | list_for_each_entry(state, &nfsi->open_states, inode_states) { | |
1c816efa | 701 | if (state->owner != owner) |
1da177e4 | 702 | continue; |
1c816efa | 703 | if (atomic_inc_not_zero(&state->count)) |
1da177e4 | 704 | return state; |
1da177e4 LT |
705 | } |
706 | return NULL; | |
707 | } | |
708 | ||
1da177e4 LT |
709 | static void |
710 | nfs4_free_open_state(struct nfs4_state *state) | |
711 | { | |
712 | kfree(state); | |
713 | } | |
714 | ||
715 | struct nfs4_state * | |
716 | nfs4_get_open_state(struct inode *inode, struct nfs4_state_owner *owner) | |
717 | { | |
718 | struct nfs4_state *state, *new; | |
719 | struct nfs_inode *nfsi = NFS_I(inode); | |
720 | ||
721 | spin_lock(&inode->i_lock); | |
722 | state = __nfs4_find_state_byowner(inode, owner); | |
723 | spin_unlock(&inode->i_lock); | |
724 | if (state) | |
725 | goto out; | |
726 | new = nfs4_alloc_open_state(); | |
ec073428 | 727 | spin_lock(&owner->so_lock); |
1da177e4 LT |
728 | spin_lock(&inode->i_lock); |
729 | state = __nfs4_find_state_byowner(inode, owner); | |
730 | if (state == NULL && new != NULL) { | |
731 | state = new; | |
1da177e4 LT |
732 | state->owner = owner; |
733 | atomic_inc(&owner->so_count); | |
734 | list_add(&state->inode_states, &nfsi->open_states); | |
0444d76a DC |
735 | ihold(inode); |
736 | state->inode = inode; | |
1da177e4 | 737 | spin_unlock(&inode->i_lock); |
ec073428 TM |
738 | /* Note: The reclaim code dictates that we add stateless |
739 | * and read-only stateids to the end of the list */ | |
740 | list_add_tail(&state->open_states, &owner->so_states); | |
741 | spin_unlock(&owner->so_lock); | |
1da177e4 LT |
742 | } else { |
743 | spin_unlock(&inode->i_lock); | |
ec073428 | 744 | spin_unlock(&owner->so_lock); |
1da177e4 LT |
745 | if (new) |
746 | nfs4_free_open_state(new); | |
747 | } | |
748 | out: | |
749 | return state; | |
750 | } | |
751 | ||
1da177e4 LT |
752 | void nfs4_put_open_state(struct nfs4_state *state) |
753 | { | |
754 | struct inode *inode = state->inode; | |
755 | struct nfs4_state_owner *owner = state->owner; | |
756 | ||
ec073428 | 757 | if (!atomic_dec_and_lock(&state->count, &owner->so_lock)) |
1da177e4 | 758 | return; |
ec073428 | 759 | spin_lock(&inode->i_lock); |
ba683031 | 760 | list_del(&state->inode_states); |
1da177e4 | 761 | list_del(&state->open_states); |
ec073428 TM |
762 | spin_unlock(&inode->i_lock); |
763 | spin_unlock(&owner->so_lock); | |
1da177e4 | 764 | iput(inode); |
1da177e4 LT |
765 | nfs4_free_open_state(state); |
766 | nfs4_put_state_owner(owner); | |
767 | } | |
768 | ||
769 | /* | |
83c9d41e | 770 | * Close the current file. |
1da177e4 | 771 | */ |
643168c2 | 772 | static void __nfs4_close(struct nfs4_state *state, |
8535b2be | 773 | fmode_t fmode, gfp_t gfp_mask, int wait) |
1da177e4 | 774 | { |
1da177e4 | 775 | struct nfs4_state_owner *owner = state->owner; |
003707c7 | 776 | int call_close = 0; |
dc0b027d | 777 | fmode_t newstate; |
1da177e4 LT |
778 | |
779 | atomic_inc(&owner->so_count); | |
1da177e4 | 780 | /* Protect against nfs4_find_state() */ |
ec073428 | 781 | spin_lock(&owner->so_lock); |
dc0b027d | 782 | switch (fmode & (FMODE_READ | FMODE_WRITE)) { |
e7616923 TM |
783 | case FMODE_READ: |
784 | state->n_rdonly--; | |
785 | break; | |
786 | case FMODE_WRITE: | |
787 | state->n_wronly--; | |
788 | break; | |
789 | case FMODE_READ|FMODE_WRITE: | |
790 | state->n_rdwr--; | |
791 | } | |
003707c7 | 792 | newstate = FMODE_READ|FMODE_WRITE; |
e7616923 | 793 | if (state->n_rdwr == 0) { |
003707c7 | 794 | if (state->n_rdonly == 0) { |
e7616923 | 795 | newstate &= ~FMODE_READ; |
003707c7 TM |
796 | call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags); |
797 | call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); | |
798 | } | |
799 | if (state->n_wronly == 0) { | |
e7616923 | 800 | newstate &= ~FMODE_WRITE; |
003707c7 TM |
801 | call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags); |
802 | call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); | |
803 | } | |
804 | if (newstate == 0) | |
805 | clear_bit(NFS_DELEGATED_STATE, &state->flags); | |
e7616923 | 806 | } |
003707c7 | 807 | nfs4_state_set_mode_locked(state, newstate); |
ec073428 | 808 | spin_unlock(&owner->so_lock); |
4cecb76f | 809 | |
003707c7 | 810 | if (!call_close) { |
b39e625b TM |
811 | nfs4_put_open_state(state); |
812 | nfs4_put_state_owner(owner); | |
1f7977c1 TM |
813 | } else |
814 | nfs4_do_close(state, gfp_mask, wait); | |
a49c3c77 TM |
815 | } |
816 | ||
643168c2 | 817 | void nfs4_close_state(struct nfs4_state *state, fmode_t fmode) |
a49c3c77 | 818 | { |
643168c2 | 819 | __nfs4_close(state, fmode, GFP_NOFS, 0); |
a49c3c77 TM |
820 | } |
821 | ||
643168c2 | 822 | void nfs4_close_sync(struct nfs4_state *state, fmode_t fmode) |
a49c3c77 | 823 | { |
643168c2 | 824 | __nfs4_close(state, fmode, GFP_KERNEL, 1); |
1da177e4 LT |
825 | } |
826 | ||
827 | /* | |
828 | * Search the state->lock_states for an existing lock_owner | |
829 | * that is compatible with current->files | |
830 | */ | |
831 | static struct nfs4_lock_state * | |
77041ed9 | 832 | __nfs4_find_lock_state(struct nfs4_state *state, fl_owner_t fl_owner, pid_t fl_pid, unsigned int type) |
1da177e4 LT |
833 | { |
834 | struct nfs4_lock_state *pos; | |
835 | list_for_each_entry(pos, &state->lock_states, ls_locks) { | |
77041ed9 | 836 | if (type != NFS4_ANY_LOCK_TYPE && pos->ls_owner.lo_type != type) |
1da177e4 | 837 | continue; |
77041ed9 TM |
838 | switch (pos->ls_owner.lo_type) { |
839 | case NFS4_POSIX_LOCK_TYPE: | |
840 | if (pos->ls_owner.lo_u.posix_owner != fl_owner) | |
841 | continue; | |
842 | break; | |
843 | case NFS4_FLOCK_LOCK_TYPE: | |
844 | if (pos->ls_owner.lo_u.flock_owner != fl_pid) | |
845 | continue; | |
846 | } | |
1da177e4 LT |
847 | atomic_inc(&pos->ls_count); |
848 | return pos; | |
849 | } | |
850 | return NULL; | |
851 | } | |
852 | ||
1da177e4 LT |
853 | /* |
854 | * Return a compatible lock_state. If no initialized lock_state structure | |
855 | * exists, return an uninitialized one. | |
856 | * | |
1da177e4 | 857 | */ |
77041ed9 | 858 | static struct nfs4_lock_state *nfs4_alloc_lock_state(struct nfs4_state *state, fl_owner_t fl_owner, pid_t fl_pid, unsigned int type) |
1da177e4 LT |
859 | { |
860 | struct nfs4_lock_state *lsp; | |
24d292b8 | 861 | struct nfs_server *server = state->owner->so_server; |
1da177e4 | 862 | |
8535b2be | 863 | lsp = kzalloc(sizeof(*lsp), GFP_NOFS); |
1da177e4 LT |
864 | if (lsp == NULL) |
865 | return NULL; | |
7ba127ab | 866 | nfs4_init_seqid_counter(&lsp->ls_seqid); |
1da177e4 | 867 | atomic_set(&lsp->ls_count, 1); |
b64aec8d | 868 | lsp->ls_state = state; |
77041ed9 TM |
869 | lsp->ls_owner.lo_type = type; |
870 | switch (lsp->ls_owner.lo_type) { | |
871 | case NFS4_FLOCK_LOCK_TYPE: | |
872 | lsp->ls_owner.lo_u.flock_owner = fl_pid; | |
873 | break; | |
874 | case NFS4_POSIX_LOCK_TYPE: | |
875 | lsp->ls_owner.lo_u.posix_owner = fl_owner; | |
876 | break; | |
877 | default: | |
d2d7ce28 | 878 | goto out_free; |
77041ed9 | 879 | } |
48c22eb2 TM |
880 | lsp->ls_seqid.owner_id = ida_simple_get(&server->lockowner_id, 0, 0, GFP_NOFS); |
881 | if (lsp->ls_seqid.owner_id < 0) | |
d2d7ce28 | 882 | goto out_free; |
8d0a8a9d | 883 | INIT_LIST_HEAD(&lsp->ls_locks); |
1da177e4 | 884 | return lsp; |
d2d7ce28 TM |
885 | out_free: |
886 | kfree(lsp); | |
887 | return NULL; | |
1da177e4 LT |
888 | } |
889 | ||
5ae67c4f | 890 | void nfs4_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp) |
9f958ab8 | 891 | { |
48c22eb2 | 892 | ida_simple_remove(&server->lockowner_id, lsp->ls_seqid.owner_id); |
7ba127ab | 893 | nfs4_destroy_seqid_counter(&lsp->ls_seqid); |
9f958ab8 TM |
894 | kfree(lsp); |
895 | } | |
896 | ||
1da177e4 LT |
897 | /* |
898 | * Return a compatible lock_state. If no initialized lock_state structure | |
899 | * exists, return an uninitialized one. | |
900 | * | |
1da177e4 | 901 | */ |
77041ed9 | 902 | static struct nfs4_lock_state *nfs4_get_lock_state(struct nfs4_state *state, fl_owner_t owner, pid_t pid, unsigned int type) |
1da177e4 | 903 | { |
8d0a8a9d | 904 | struct nfs4_lock_state *lsp, *new = NULL; |
1da177e4 | 905 | |
8d0a8a9d TM |
906 | for(;;) { |
907 | spin_lock(&state->state_lock); | |
77041ed9 | 908 | lsp = __nfs4_find_lock_state(state, owner, pid, type); |
8d0a8a9d TM |
909 | if (lsp != NULL) |
910 | break; | |
911 | if (new != NULL) { | |
8d0a8a9d TM |
912 | list_add(&new->ls_locks, &state->lock_states); |
913 | set_bit(LK_STATE_IN_USE, &state->flags); | |
914 | lsp = new; | |
915 | new = NULL; | |
916 | break; | |
917 | } | |
918 | spin_unlock(&state->state_lock); | |
77041ed9 | 919 | new = nfs4_alloc_lock_state(state, owner, pid, type); |
8d0a8a9d TM |
920 | if (new == NULL) |
921 | return NULL; | |
922 | } | |
923 | spin_unlock(&state->state_lock); | |
9f958ab8 | 924 | if (new != NULL) |
5ae67c4f | 925 | nfs4_free_lock_state(state->owner->so_server, new); |
1da177e4 LT |
926 | return lsp; |
927 | } | |
928 | ||
929 | /* | |
8d0a8a9d TM |
930 | * Release reference to lock_state, and free it if we see that |
931 | * it is no longer in use | |
1da177e4 | 932 | */ |
faf5f49c | 933 | void nfs4_put_lock_state(struct nfs4_lock_state *lsp) |
1da177e4 | 934 | { |
8d0a8a9d | 935 | struct nfs4_state *state; |
1da177e4 | 936 | |
8d0a8a9d TM |
937 | if (lsp == NULL) |
938 | return; | |
939 | state = lsp->ls_state; | |
940 | if (!atomic_dec_and_lock(&lsp->ls_count, &state->state_lock)) | |
941 | return; | |
942 | list_del(&lsp->ls_locks); | |
943 | if (list_empty(&state->lock_states)) | |
944 | clear_bit(LK_STATE_IN_USE, &state->flags); | |
945 | spin_unlock(&state->state_lock); | |
795a88c9 | 946 | if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) { |
cf470c3e TM |
947 | if (nfs4_release_lockowner(lsp) == 0) |
948 | return; | |
949 | } | |
5ae67c4f | 950 | nfs4_free_lock_state(lsp->ls_state->owner->so_server, lsp); |
1da177e4 LT |
951 | } |
952 | ||
8d0a8a9d | 953 | static void nfs4_fl_copy_lock(struct file_lock *dst, struct file_lock *src) |
1da177e4 | 954 | { |
8d0a8a9d | 955 | struct nfs4_lock_state *lsp = src->fl_u.nfs4_fl.owner; |
1da177e4 | 956 | |
8d0a8a9d TM |
957 | dst->fl_u.nfs4_fl.owner = lsp; |
958 | atomic_inc(&lsp->ls_count); | |
959 | } | |
1da177e4 | 960 | |
8d0a8a9d | 961 | static void nfs4_fl_release_lock(struct file_lock *fl) |
1da177e4 | 962 | { |
8d0a8a9d | 963 | nfs4_put_lock_state(fl->fl_u.nfs4_fl.owner); |
1da177e4 LT |
964 | } |
965 | ||
6aed6285 | 966 | static const struct file_lock_operations nfs4_fl_lock_ops = { |
8d0a8a9d TM |
967 | .fl_copy_lock = nfs4_fl_copy_lock, |
968 | .fl_release_private = nfs4_fl_release_lock, | |
969 | }; | |
970 | ||
971 | int nfs4_set_lock_state(struct nfs4_state *state, struct file_lock *fl) | |
1da177e4 | 972 | { |
8d0a8a9d TM |
973 | struct nfs4_lock_state *lsp; |
974 | ||
975 | if (fl->fl_ops != NULL) | |
976 | return 0; | |
77041ed9 TM |
977 | if (fl->fl_flags & FL_POSIX) |
978 | lsp = nfs4_get_lock_state(state, fl->fl_owner, 0, NFS4_POSIX_LOCK_TYPE); | |
979 | else if (fl->fl_flags & FL_FLOCK) | |
17280175 TM |
980 | lsp = nfs4_get_lock_state(state, NULL, fl->fl_pid, |
981 | NFS4_FLOCK_LOCK_TYPE); | |
77041ed9 TM |
982 | else |
983 | return -EINVAL; | |
8d0a8a9d TM |
984 | if (lsp == NULL) |
985 | return -ENOMEM; | |
986 | fl->fl_u.nfs4_fl.owner = lsp; | |
987 | fl->fl_ops = &nfs4_fl_lock_ops; | |
988 | return 0; | |
1da177e4 LT |
989 | } |
990 | ||
4fc8796d | 991 | static bool nfs4_copy_lock_stateid(nfs4_stateid *dst, struct nfs4_state *state, |
2a369153 | 992 | const struct nfs_lockowner *lockowner) |
1da177e4 | 993 | { |
8d0a8a9d | 994 | struct nfs4_lock_state *lsp; |
2a369153 TM |
995 | fl_owner_t fl_owner; |
996 | pid_t fl_pid; | |
4fc8796d | 997 | bool ret = false; |
1da177e4 | 998 | |
2a369153 TM |
999 | |
1000 | if (lockowner == NULL) | |
1001 | goto out; | |
1002 | ||
8d0a8a9d | 1003 | if (test_bit(LK_STATE_IN_USE, &state->flags) == 0) |
4fc8796d | 1004 | goto out; |
1da177e4 | 1005 | |
2a369153 TM |
1006 | fl_owner = lockowner->l_owner; |
1007 | fl_pid = lockowner->l_pid; | |
8d0a8a9d | 1008 | spin_lock(&state->state_lock); |
77041ed9 | 1009 | lsp = __nfs4_find_lock_state(state, fl_owner, fl_pid, NFS4_ANY_LOCK_TYPE); |
795a88c9 | 1010 | if (lsp != NULL && test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0) { |
f597c537 | 1011 | nfs4_stateid_copy(dst, &lsp->ls_stateid); |
4fc8796d TM |
1012 | ret = true; |
1013 | } | |
8d0a8a9d | 1014 | spin_unlock(&state->state_lock); |
1da177e4 | 1015 | nfs4_put_lock_state(lsp); |
4fc8796d TM |
1016 | out: |
1017 | return ret; | |
1018 | } | |
1019 | ||
1020 | static void nfs4_copy_open_stateid(nfs4_stateid *dst, struct nfs4_state *state) | |
1021 | { | |
1022 | int seq; | |
1023 | ||
1024 | do { | |
1025 | seq = read_seqbegin(&state->seqlock); | |
1026 | nfs4_stateid_copy(dst, &state->stateid); | |
1027 | } while (read_seqretry(&state->seqlock, seq)); | |
1028 | } | |
1029 | ||
1030 | /* | |
1031 | * Byte-range lock aware utility to initialize the stateid of read/write | |
1032 | * requests. | |
1033 | */ | |
1034 | void nfs4_select_rw_stateid(nfs4_stateid *dst, struct nfs4_state *state, | |
2a369153 | 1035 | fmode_t fmode, const struct nfs_lockowner *lockowner) |
4fc8796d TM |
1036 | { |
1037 | if (nfs4_copy_delegation_stateid(dst, state->inode, fmode)) | |
1038 | return; | |
2a369153 | 1039 | if (nfs4_copy_lock_stateid(dst, state, lockowner)) |
4fc8796d TM |
1040 | return; |
1041 | nfs4_copy_open_stateid(dst, state); | |
1da177e4 LT |
1042 | } |
1043 | ||
8535b2be | 1044 | struct nfs_seqid *nfs_alloc_seqid(struct nfs_seqid_counter *counter, gfp_t gfp_mask) |
cee54fc9 | 1045 | { |
cee54fc9 TM |
1046 | struct nfs_seqid *new; |
1047 | ||
8535b2be | 1048 | new = kmalloc(sizeof(*new), gfp_mask); |
cee54fc9 TM |
1049 | if (new != NULL) { |
1050 | new->sequence = counter; | |
2f74c0a0 | 1051 | INIT_LIST_HEAD(&new->list); |
4601df20 | 1052 | new->task = NULL; |
cee54fc9 TM |
1053 | } |
1054 | return new; | |
1055 | } | |
1056 | ||
72211dbe | 1057 | void nfs_release_seqid(struct nfs_seqid *seqid) |
1da177e4 | 1058 | { |
4601df20 | 1059 | struct nfs_seqid_counter *sequence; |
cee54fc9 | 1060 | |
4601df20 TM |
1061 | if (list_empty(&seqid->list)) |
1062 | return; | |
1063 | sequence = seqid->sequence; | |
1064 | spin_lock(&sequence->lock); | |
1065 | list_del_init(&seqid->list); | |
1066 | if (!list_empty(&sequence->list)) { | |
1067 | struct nfs_seqid *next; | |
1068 | ||
1069 | next = list_first_entry(&sequence->list, | |
1070 | struct nfs_seqid, list); | |
1071 | rpc_wake_up_queued_task(&sequence->wait, next->task); | |
2f74c0a0 | 1072 | } |
4601df20 | 1073 | spin_unlock(&sequence->lock); |
72211dbe TM |
1074 | } |
1075 | ||
1076 | void nfs_free_seqid(struct nfs_seqid *seqid) | |
1077 | { | |
1078 | nfs_release_seqid(seqid); | |
cee54fc9 | 1079 | kfree(seqid); |
1da177e4 LT |
1080 | } |
1081 | ||
1082 | /* | |
cee54fc9 TM |
1083 | * Increment the seqid if the OPEN/OPEN_DOWNGRADE/CLOSE succeeded, or |
1084 | * failed with a seqid incrementing error - | |
1085 | * see comments nfs_fs.h:seqid_mutating_error() | |
1086 | */ | |
88d90939 | 1087 | static void nfs_increment_seqid(int status, struct nfs_seqid *seqid) |
cee54fc9 | 1088 | { |
7ba127ab | 1089 | BUG_ON(list_first_entry(&seqid->sequence->list, struct nfs_seqid, list) != seqid); |
cee54fc9 TM |
1090 | switch (status) { |
1091 | case 0: | |
1092 | break; | |
1093 | case -NFS4ERR_BAD_SEQID: | |
6f43ddcc TM |
1094 | if (seqid->sequence->flags & NFS_SEQID_CONFIRMED) |
1095 | return; | |
9a3ba432 | 1096 | pr_warn_ratelimited("NFS: v4 server returned a bad" |
497799e7 DM |
1097 | " sequence-id error on an" |
1098 | " unconfirmed sequence %p!\n", | |
6f43ddcc | 1099 | seqid->sequence); |
cee54fc9 TM |
1100 | case -NFS4ERR_STALE_CLIENTID: |
1101 | case -NFS4ERR_STALE_STATEID: | |
1102 | case -NFS4ERR_BAD_STATEID: | |
1103 | case -NFS4ERR_BADXDR: | |
1104 | case -NFS4ERR_RESOURCE: | |
1105 | case -NFS4ERR_NOFILEHANDLE: | |
1106 | /* Non-seqid mutating errors */ | |
1107 | return; | |
1108 | }; | |
1109 | /* | |
1110 | * Note: no locking needed as we are guaranteed to be first | |
1111 | * on the sequence list | |
1112 | */ | |
1113 | seqid->sequence->counter++; | |
1114 | } | |
1115 | ||
1116 | void nfs_increment_open_seqid(int status, struct nfs_seqid *seqid) | |
1117 | { | |
34dc1ad7 BH |
1118 | struct nfs4_state_owner *sp = container_of(seqid->sequence, |
1119 | struct nfs4_state_owner, so_seqid); | |
1120 | struct nfs_server *server = sp->so_server; | |
1121 | ||
1122 | if (status == -NFS4ERR_BAD_SEQID) | |
1da177e4 | 1123 | nfs4_drop_state_owner(sp); |
34dc1ad7 BH |
1124 | if (!nfs4_has_session(server->nfs_client)) |
1125 | nfs_increment_seqid(status, seqid); | |
cee54fc9 TM |
1126 | } |
1127 | ||
1128 | /* | |
cee54fc9 TM |
1129 | * Increment the seqid if the LOCK/LOCKU succeeded, or |
1130 | * failed with a seqid incrementing error - | |
1131 | * see comments nfs_fs.h:seqid_mutating_error() | |
1132 | */ | |
1133 | void nfs_increment_lock_seqid(int status, struct nfs_seqid *seqid) | |
1134 | { | |
88d90939 | 1135 | nfs_increment_seqid(status, seqid); |
cee54fc9 TM |
1136 | } |
1137 | ||
1138 | int nfs_wait_on_sequence(struct nfs_seqid *seqid, struct rpc_task *task) | |
1139 | { | |
7ba127ab | 1140 | struct nfs_seqid_counter *sequence = seqid->sequence; |
cee54fc9 TM |
1141 | int status = 0; |
1142 | ||
1143 | spin_lock(&sequence->lock); | |
4601df20 | 1144 | seqid->task = task; |
2f74c0a0 TM |
1145 | if (list_empty(&seqid->list)) |
1146 | list_add_tail(&seqid->list, &sequence->list); | |
1147 | if (list_first_entry(&sequence->list, struct nfs_seqid, list) == seqid) | |
1148 | goto unlock; | |
5d00837b | 1149 | rpc_sleep_on(&sequence->wait, task, NULL); |
2f74c0a0 TM |
1150 | status = -EAGAIN; |
1151 | unlock: | |
cee54fc9 TM |
1152 | spin_unlock(&sequence->lock); |
1153 | return status; | |
1da177e4 LT |
1154 | } |
1155 | ||
e005e804 | 1156 | static int nfs4_run_state_manager(void *); |
1da177e4 | 1157 | |
e005e804 | 1158 | static void nfs4_clear_state_manager_bit(struct nfs_client *clp) |
433fbe4c TM |
1159 | { |
1160 | smp_mb__before_clear_bit(); | |
e005e804 | 1161 | clear_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state); |
433fbe4c | 1162 | smp_mb__after_clear_bit(); |
e005e804 | 1163 | wake_up_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING); |
433fbe4c TM |
1164 | rpc_wake_up(&clp->cl_rpcwaitq); |
1165 | } | |
1166 | ||
1da177e4 | 1167 | /* |
e005e804 | 1168 | * Schedule the nfs_client asynchronous state management routine |
1da177e4 | 1169 | */ |
b0d3ded1 | 1170 | void nfs4_schedule_state_manager(struct nfs_client *clp) |
1da177e4 | 1171 | { |
5043e900 | 1172 | struct task_struct *task; |
2446ab60 | 1173 | char buf[INET6_ADDRSTRLEN + sizeof("-manager") + 1]; |
1da177e4 | 1174 | |
e005e804 TM |
1175 | if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) != 0) |
1176 | return; | |
5043e900 TM |
1177 | __module_get(THIS_MODULE); |
1178 | atomic_inc(&clp->cl_count); | |
2446ab60 TM |
1179 | |
1180 | /* The rcu_read_lock() is not strictly necessary, as the state | |
1181 | * manager is the only thread that ever changes the rpc_xprt | |
1182 | * after it's initialized. At this point, we're single threaded. */ | |
1183 | rcu_read_lock(); | |
1184 | snprintf(buf, sizeof(buf), "%s-manager", | |
1185 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)); | |
1186 | rcu_read_unlock(); | |
1187 | task = kthread_run(nfs4_run_state_manager, clp, buf); | |
1188 | if (IS_ERR(task)) { | |
1189 | printk(KERN_ERR "%s: kthread_run: %ld\n", | |
1190 | __func__, PTR_ERR(task)); | |
1191 | nfs4_clear_state_manager_bit(clp); | |
1192 | nfs_put_client(clp); | |
1193 | module_put(THIS_MODULE); | |
1194 | } | |
1da177e4 LT |
1195 | } |
1196 | ||
1197 | /* | |
0400a6b0 | 1198 | * Schedule a lease recovery attempt |
1da177e4 | 1199 | */ |
0400a6b0 | 1200 | void nfs4_schedule_lease_recovery(struct nfs_client *clp) |
1da177e4 LT |
1201 | { |
1202 | if (!clp) | |
1203 | return; | |
e598d843 TM |
1204 | if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
1205 | set_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); | |
cc0a9843 TM |
1206 | dprintk("%s: scheduling lease recovery for server %s\n", __func__, |
1207 | clp->cl_hostname); | |
e005e804 | 1208 | nfs4_schedule_state_manager(clp); |
1da177e4 | 1209 | } |
9cb81968 | 1210 | EXPORT_SYMBOL_GPL(nfs4_schedule_lease_recovery); |
1da177e4 | 1211 | |
ad1e3968 TM |
1212 | /* |
1213 | * nfs40_handle_cb_pathdown - return all delegations after NFS4ERR_CB_PATH_DOWN | |
1214 | * @clp: client to process | |
1215 | * | |
1216 | * Set the NFS4CLNT_LEASE_EXPIRED state in order to force a | |
1217 | * resend of the SETCLIENTID and hence re-establish the | |
1218 | * callback channel. Then return all existing delegations. | |
1219 | */ | |
1220 | static void nfs40_handle_cb_pathdown(struct nfs_client *clp) | |
1221 | { | |
1222 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1223 | nfs_expire_all_delegations(clp); | |
cc0a9843 TM |
1224 | dprintk("%s: handling CB_PATHDOWN recovery for server %s\n", __func__, |
1225 | clp->cl_hostname); | |
ad1e3968 TM |
1226 | } |
1227 | ||
042b60be TM |
1228 | void nfs4_schedule_path_down_recovery(struct nfs_client *clp) |
1229 | { | |
ad1e3968 | 1230 | nfs40_handle_cb_pathdown(clp); |
042b60be TM |
1231 | nfs4_schedule_state_manager(clp); |
1232 | } | |
1233 | ||
f9feab1e | 1234 | static int nfs4_state_mark_reclaim_reboot(struct nfs_client *clp, struct nfs4_state *state) |
b79a4a1b TM |
1235 | { |
1236 | ||
1237 | set_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); | |
1238 | /* Don't recover state that expired before the reboot */ | |
1239 | if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) { | |
1240 | clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); | |
1241 | return 0; | |
1242 | } | |
7eff03ae | 1243 | set_bit(NFS_OWNER_RECLAIM_REBOOT, &state->owner->so_flags); |
b79a4a1b TM |
1244 | set_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state); |
1245 | return 1; | |
1246 | } | |
1247 | ||
f9feab1e | 1248 | static int nfs4_state_mark_reclaim_nograce(struct nfs_client *clp, struct nfs4_state *state) |
b79a4a1b TM |
1249 | { |
1250 | set_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags); | |
1251 | clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); | |
7eff03ae | 1252 | set_bit(NFS_OWNER_RECLAIM_NOGRACE, &state->owner->so_flags); |
b79a4a1b TM |
1253 | set_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state); |
1254 | return 1; | |
1255 | } | |
1256 | ||
0400a6b0 TM |
1257 | void nfs4_schedule_stateid_recovery(const struct nfs_server *server, struct nfs4_state *state) |
1258 | { | |
1259 | struct nfs_client *clp = server->nfs_client; | |
1260 | ||
1261 | nfs4_state_mark_reclaim_nograce(clp, state); | |
cc0a9843 TM |
1262 | dprintk("%s: scheduling stateid recovery for server %s\n", __func__, |
1263 | clp->cl_hostname); | |
0400a6b0 TM |
1264 | nfs4_schedule_state_manager(clp); |
1265 | } | |
9cb81968 | 1266 | EXPORT_SYMBOL_GPL(nfs4_schedule_stateid_recovery); |
0400a6b0 | 1267 | |
a1d0b5ee TM |
1268 | void nfs_inode_find_state_and_recover(struct inode *inode, |
1269 | const nfs4_stateid *stateid) | |
1270 | { | |
1271 | struct nfs_client *clp = NFS_SERVER(inode)->nfs_client; | |
1272 | struct nfs_inode *nfsi = NFS_I(inode); | |
1273 | struct nfs_open_context *ctx; | |
1274 | struct nfs4_state *state; | |
1275 | bool found = false; | |
1276 | ||
1277 | spin_lock(&inode->i_lock); | |
1278 | list_for_each_entry(ctx, &nfsi->open_files, list) { | |
1279 | state = ctx->state; | |
1280 | if (state == NULL) | |
1281 | continue; | |
1282 | if (!test_bit(NFS_DELEGATED_STATE, &state->flags)) | |
1283 | continue; | |
f597c537 | 1284 | if (!nfs4_stateid_match(&state->stateid, stateid)) |
a1d0b5ee TM |
1285 | continue; |
1286 | nfs4_state_mark_reclaim_nograce(clp, state); | |
1287 | found = true; | |
1288 | } | |
1289 | spin_unlock(&inode->i_lock); | |
1290 | if (found) | |
1291 | nfs4_schedule_state_manager(clp); | |
1292 | } | |
1293 | ||
1294 | ||
02860014 | 1295 | static int nfs4_reclaim_locks(struct nfs4_state *state, const struct nfs4_state_recovery_ops *ops) |
1da177e4 LT |
1296 | { |
1297 | struct inode *inode = state->inode; | |
19e03c57 | 1298 | struct nfs_inode *nfsi = NFS_I(inode); |
1da177e4 LT |
1299 | struct file_lock *fl; |
1300 | int status = 0; | |
1301 | ||
3f09df70 TM |
1302 | if (inode->i_flock == NULL) |
1303 | return 0; | |
1304 | ||
1305 | /* Guard against delegation returns and new lock/unlock calls */ | |
19e03c57 | 1306 | down_write(&nfsi->rwsem); |
3f09df70 | 1307 | /* Protect inode->i_flock using the BKL */ |
b89f4321 | 1308 | lock_flocks(); |
90dc7d27 | 1309 | for (fl = inode->i_flock; fl != NULL; fl = fl->fl_next) { |
43b2a33a | 1310 | if (!(fl->fl_flags & (FL_POSIX|FL_FLOCK))) |
1da177e4 | 1311 | continue; |
cd3758e3 | 1312 | if (nfs_file_open_context(fl->fl_file)->state != state) |
1da177e4 | 1313 | continue; |
b89f4321 | 1314 | unlock_flocks(); |
1da177e4 | 1315 | status = ops->recover_lock(state, fl); |
1da177e4 | 1316 | switch (status) { |
965b5d67 TM |
1317 | case 0: |
1318 | break; | |
1319 | case -ESTALE: | |
1320 | case -NFS4ERR_ADMIN_REVOKED: | |
1321 | case -NFS4ERR_STALE_STATEID: | |
1322 | case -NFS4ERR_BAD_STATEID: | |
1323 | case -NFS4ERR_EXPIRED: | |
1324 | case -NFS4ERR_NO_GRACE: | |
1325 | case -NFS4ERR_STALE_CLIENTID: | |
9c4c761a TM |
1326 | case -NFS4ERR_BADSESSION: |
1327 | case -NFS4ERR_BADSLOT: | |
1328 | case -NFS4ERR_BAD_HIGH_SLOT: | |
1329 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
965b5d67 | 1330 | goto out; |
1da177e4 | 1331 | default: |
a030889a WAA |
1332 | printk(KERN_ERR "NFS: %s: unhandled error %d. " |
1333 | "Zeroing state\n", __func__, status); | |
965b5d67 TM |
1334 | case -ENOMEM: |
1335 | case -NFS4ERR_DENIED: | |
1da177e4 LT |
1336 | case -NFS4ERR_RECLAIM_BAD: |
1337 | case -NFS4ERR_RECLAIM_CONFLICT: | |
43b2a33a | 1338 | /* kill_proc(fl->fl_pid, SIGLOST, 1); */ |
965b5d67 | 1339 | status = 0; |
1da177e4 | 1340 | } |
b89f4321 | 1341 | lock_flocks(); |
1da177e4 | 1342 | } |
b89f4321 | 1343 | unlock_flocks(); |
965b5d67 | 1344 | out: |
19e03c57 | 1345 | up_write(&nfsi->rwsem); |
1da177e4 LT |
1346 | return status; |
1347 | } | |
1348 | ||
02860014 | 1349 | static int nfs4_reclaim_open_state(struct nfs4_state_owner *sp, const struct nfs4_state_recovery_ops *ops) |
1da177e4 LT |
1350 | { |
1351 | struct nfs4_state *state; | |
1352 | struct nfs4_lock_state *lock; | |
1353 | int status = 0; | |
1354 | ||
1355 | /* Note: we rely on the sp->so_states list being ordered | |
1356 | * so that we always reclaim open(O_RDWR) and/or open(O_WRITE) | |
1357 | * states first. | |
1358 | * This is needed to ensure that the server won't give us any | |
1359 | * read delegations that we have to return if, say, we are | |
1360 | * recovering after a network partition or a reboot from a | |
1361 | * server that doesn't support a grace period. | |
1362 | */ | |
fe1d8195 TM |
1363 | restart: |
1364 | spin_lock(&sp->so_lock); | |
1da177e4 | 1365 | list_for_each_entry(state, &sp->so_states, open_states) { |
b79a4a1b TM |
1366 | if (!test_and_clear_bit(ops->state_flag_bit, &state->flags)) |
1367 | continue; | |
1da177e4 LT |
1368 | if (state->state == 0) |
1369 | continue; | |
fe1d8195 TM |
1370 | atomic_inc(&state->count); |
1371 | spin_unlock(&sp->so_lock); | |
1da177e4 | 1372 | status = ops->recover_open(sp, state); |
1da177e4 | 1373 | if (status >= 0) { |
02860014 TM |
1374 | status = nfs4_reclaim_locks(state, ops); |
1375 | if (status >= 0) { | |
4b44b40e | 1376 | spin_lock(&state->state_lock); |
02860014 | 1377 | list_for_each_entry(lock, &state->lock_states, ls_locks) { |
795a88c9 | 1378 | if (!test_bit(NFS_LOCK_INITIALIZED, &lock->ls_flags)) |
96dcadc2 WD |
1379 | pr_warn_ratelimited("NFS: " |
1380 | "%s: Lock reclaim " | |
a030889a | 1381 | "failed!\n", __func__); |
02860014 | 1382 | } |
4b44b40e | 1383 | spin_unlock(&state->state_lock); |
fe1d8195 TM |
1384 | nfs4_put_open_state(state); |
1385 | goto restart; | |
1da177e4 | 1386 | } |
1da177e4 LT |
1387 | } |
1388 | switch (status) { | |
1389 | default: | |
a030889a WAA |
1390 | printk(KERN_ERR "NFS: %s: unhandled error %d. " |
1391 | "Zeroing state\n", __func__, status); | |
1da177e4 | 1392 | case -ENOENT: |
965b5d67 | 1393 | case -ENOMEM: |
b79a4a1b | 1394 | case -ESTALE: |
1da177e4 LT |
1395 | /* |
1396 | * Open state on this file cannot be recovered | |
1397 | * All we can do is revert to using the zero stateid. | |
1398 | */ | |
2d2f24ad TM |
1399 | memset(&state->stateid, 0, |
1400 | sizeof(state->stateid)); | |
1da177e4 LT |
1401 | /* Mark the file as being 'closed' */ |
1402 | state->state = 0; | |
1403 | break; | |
168667c4 TM |
1404 | case -EKEYEXPIRED: |
1405 | /* | |
1406 | * User RPCSEC_GSS context has expired. | |
1407 | * We cannot recover this stateid now, so | |
1408 | * skip it and allow recovery thread to | |
1409 | * proceed. | |
1410 | */ | |
1411 | break; | |
965b5d67 TM |
1412 | case -NFS4ERR_ADMIN_REVOKED: |
1413 | case -NFS4ERR_STALE_STATEID: | |
1414 | case -NFS4ERR_BAD_STATEID: | |
b79a4a1b TM |
1415 | case -NFS4ERR_RECLAIM_BAD: |
1416 | case -NFS4ERR_RECLAIM_CONFLICT: | |
1f0e890d | 1417 | nfs4_state_mark_reclaim_nograce(sp->so_server->nfs_client, state); |
b79a4a1b | 1418 | break; |
1da177e4 LT |
1419 | case -NFS4ERR_EXPIRED: |
1420 | case -NFS4ERR_NO_GRACE: | |
1f0e890d | 1421 | nfs4_state_mark_reclaim_nograce(sp->so_server->nfs_client, state); |
1da177e4 | 1422 | case -NFS4ERR_STALE_CLIENTID: |
9c4c761a TM |
1423 | case -NFS4ERR_BADSESSION: |
1424 | case -NFS4ERR_BADSLOT: | |
1425 | case -NFS4ERR_BAD_HIGH_SLOT: | |
1426 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
1da177e4 LT |
1427 | goto out_err; |
1428 | } | |
fe1d8195 TM |
1429 | nfs4_put_open_state(state); |
1430 | goto restart; | |
1da177e4 | 1431 | } |
fe1d8195 | 1432 | spin_unlock(&sp->so_lock); |
1da177e4 LT |
1433 | return 0; |
1434 | out_err: | |
fe1d8195 | 1435 | nfs4_put_open_state(state); |
1da177e4 LT |
1436 | return status; |
1437 | } | |
1438 | ||
b79a4a1b TM |
1439 | static void nfs4_clear_open_state(struct nfs4_state *state) |
1440 | { | |
1441 | struct nfs4_lock_state *lock; | |
1442 | ||
1443 | clear_bit(NFS_DELEGATED_STATE, &state->flags); | |
1444 | clear_bit(NFS_O_RDONLY_STATE, &state->flags); | |
1445 | clear_bit(NFS_O_WRONLY_STATE, &state->flags); | |
1446 | clear_bit(NFS_O_RDWR_STATE, &state->flags); | |
4b44b40e | 1447 | spin_lock(&state->state_lock); |
b79a4a1b | 1448 | list_for_each_entry(lock, &state->lock_states, ls_locks) { |
b79a4a1b | 1449 | lock->ls_seqid.flags = 0; |
795a88c9 | 1450 | clear_bit(NFS_LOCK_INITIALIZED, &lock->ls_flags); |
b79a4a1b | 1451 | } |
4b44b40e | 1452 | spin_unlock(&state->state_lock); |
b79a4a1b TM |
1453 | } |
1454 | ||
24d292b8 CL |
1455 | static void nfs4_reset_seqids(struct nfs_server *server, |
1456 | int (*mark_reclaim)(struct nfs_client *clp, struct nfs4_state *state)) | |
cee54fc9 | 1457 | { |
24d292b8 | 1458 | struct nfs_client *clp = server->nfs_client; |
cee54fc9 | 1459 | struct nfs4_state_owner *sp; |
9f958ab8 | 1460 | struct rb_node *pos; |
cee54fc9 | 1461 | struct nfs4_state *state; |
cee54fc9 | 1462 | |
24d292b8 CL |
1463 | spin_lock(&clp->cl_lock); |
1464 | for (pos = rb_first(&server->state_owners); | |
1465 | pos != NULL; | |
1466 | pos = rb_next(pos)) { | |
1467 | sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); | |
cee54fc9 | 1468 | sp->so_seqid.flags = 0; |
ec073428 | 1469 | spin_lock(&sp->so_lock); |
cee54fc9 | 1470 | list_for_each_entry(state, &sp->so_states, open_states) { |
b79a4a1b TM |
1471 | if (mark_reclaim(clp, state)) |
1472 | nfs4_clear_open_state(state); | |
cee54fc9 | 1473 | } |
ec073428 | 1474 | spin_unlock(&sp->so_lock); |
cee54fc9 | 1475 | } |
24d292b8 CL |
1476 | spin_unlock(&clp->cl_lock); |
1477 | } | |
1478 | ||
1479 | static void nfs4_state_mark_reclaim_helper(struct nfs_client *clp, | |
1480 | int (*mark_reclaim)(struct nfs_client *clp, struct nfs4_state *state)) | |
1481 | { | |
1482 | struct nfs_server *server; | |
1483 | ||
1484 | rcu_read_lock(); | |
1485 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) | |
1486 | nfs4_reset_seqids(server, mark_reclaim); | |
1487 | rcu_read_unlock(); | |
cee54fc9 TM |
1488 | } |
1489 | ||
b79a4a1b TM |
1490 | static void nfs4_state_start_reclaim_reboot(struct nfs_client *clp) |
1491 | { | |
1492 | /* Mark all delegations for reclaim */ | |
1493 | nfs_delegation_mark_reclaim(clp); | |
1494 | nfs4_state_mark_reclaim_helper(clp, nfs4_state_mark_reclaim_reboot); | |
1495 | } | |
1496 | ||
fce5c838 RL |
1497 | static void nfs4_reclaim_complete(struct nfs_client *clp, |
1498 | const struct nfs4_state_recovery_ops *ops) | |
1499 | { | |
1500 | /* Notify the server we're done reclaiming our state */ | |
1501 | if (ops->reclaim_complete) | |
1502 | (void)ops->reclaim_complete(clp); | |
1503 | } | |
1504 | ||
24d292b8 | 1505 | static void nfs4_clear_reclaim_server(struct nfs_server *server) |
b79a4a1b | 1506 | { |
24d292b8 | 1507 | struct nfs_client *clp = server->nfs_client; |
b79a4a1b TM |
1508 | struct nfs4_state_owner *sp; |
1509 | struct rb_node *pos; | |
1510 | struct nfs4_state *state; | |
1511 | ||
24d292b8 CL |
1512 | spin_lock(&clp->cl_lock); |
1513 | for (pos = rb_first(&server->state_owners); | |
1514 | pos != NULL; | |
1515 | pos = rb_next(pos)) { | |
1516 | sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); | |
b79a4a1b TM |
1517 | spin_lock(&sp->so_lock); |
1518 | list_for_each_entry(state, &sp->so_states, open_states) { | |
24d292b8 CL |
1519 | if (!test_and_clear_bit(NFS_STATE_RECLAIM_REBOOT, |
1520 | &state->flags)) | |
b79a4a1b TM |
1521 | continue; |
1522 | nfs4_state_mark_reclaim_nograce(clp, state); | |
1523 | } | |
1524 | spin_unlock(&sp->so_lock); | |
1525 | } | |
24d292b8 CL |
1526 | spin_unlock(&clp->cl_lock); |
1527 | } | |
1528 | ||
1529 | static int nfs4_state_clear_reclaim_reboot(struct nfs_client *clp) | |
1530 | { | |
1531 | struct nfs_server *server; | |
1532 | ||
1533 | if (!test_and_clear_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) | |
1534 | return 0; | |
1535 | ||
1536 | rcu_read_lock(); | |
1537 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) | |
1538 | nfs4_clear_reclaim_server(server); | |
1539 | rcu_read_unlock(); | |
b79a4a1b TM |
1540 | |
1541 | nfs_delegation_reap_unclaimed(clp); | |
6eaa6149 TM |
1542 | return 1; |
1543 | } | |
1544 | ||
1545 | static void nfs4_state_end_reclaim_reboot(struct nfs_client *clp) | |
1546 | { | |
1547 | if (!nfs4_state_clear_reclaim_reboot(clp)) | |
1548 | return; | |
1549 | nfs4_reclaim_complete(clp, clp->cl_mvops->reboot_recovery_ops); | |
b79a4a1b TM |
1550 | } |
1551 | ||
1552 | static void nfs_delegation_clear_all(struct nfs_client *clp) | |
1553 | { | |
1554 | nfs_delegation_mark_reclaim(clp); | |
1555 | nfs_delegation_reap_unclaimed(clp); | |
1556 | } | |
1557 | ||
1558 | static void nfs4_state_start_reclaim_nograce(struct nfs_client *clp) | |
1559 | { | |
1560 | nfs_delegation_clear_all(clp); | |
1561 | nfs4_state_mark_reclaim_helper(clp, nfs4_state_mark_reclaim_nograce); | |
1562 | } | |
1563 | ||
168667c4 TM |
1564 | static void nfs4_warn_keyexpired(const char *s) |
1565 | { | |
1566 | printk_ratelimited(KERN_WARNING "Error: state manager" | |
1567 | " encountered RPCSEC_GSS session" | |
1568 | " expired against NFSv4 server %s.\n", | |
1569 | s); | |
1570 | } | |
1571 | ||
4f7cdf18 | 1572 | static int nfs4_recovery_handle_error(struct nfs_client *clp, int error) |
e598d843 TM |
1573 | { |
1574 | switch (error) { | |
4f38e4aa TM |
1575 | case 0: |
1576 | break; | |
e598d843 | 1577 | case -NFS4ERR_CB_PATH_DOWN: |
ad1e3968 | 1578 | nfs40_handle_cb_pathdown(clp); |
4f38e4aa | 1579 | break; |
c8b7ae3d TM |
1580 | case -NFS4ERR_NO_GRACE: |
1581 | nfs4_state_end_reclaim_reboot(clp); | |
4f38e4aa | 1582 | break; |
e598d843 TM |
1583 | case -NFS4ERR_STALE_CLIENTID: |
1584 | case -NFS4ERR_LEASE_MOVED: | |
1585 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
6eaa6149 | 1586 | nfs4_state_clear_reclaim_reboot(clp); |
e598d843 TM |
1587 | nfs4_state_start_reclaim_reboot(clp); |
1588 | break; | |
1589 | case -NFS4ERR_EXPIRED: | |
1590 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1591 | nfs4_state_start_reclaim_nograce(clp); | |
8ba9bf8e | 1592 | break; |
c3fad1b1 AA |
1593 | case -NFS4ERR_BADSESSION: |
1594 | case -NFS4ERR_BADSLOT: | |
1595 | case -NFS4ERR_BAD_HIGH_SLOT: | |
1596 | case -NFS4ERR_DEADSESSION: | |
c3fad1b1 AA |
1597 | case -NFS4ERR_SEQ_FALSE_RETRY: |
1598 | case -NFS4ERR_SEQ_MISORDERED: | |
6df08189 | 1599 | set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); |
0b9e2d41 | 1600 | /* Zero session reset errors */ |
4f38e4aa | 1601 | break; |
7c5d7256 TM |
1602 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: |
1603 | set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); | |
1604 | break; | |
168667c4 TM |
1605 | case -EKEYEXPIRED: |
1606 | /* Nothing we can do */ | |
1607 | nfs4_warn_keyexpired(clp->cl_hostname); | |
4f38e4aa TM |
1608 | break; |
1609 | default: | |
cc0a9843 TM |
1610 | dprintk("%s: failed to handle error %d for server %s\n", |
1611 | __func__, error, clp->cl_hostname); | |
4f38e4aa | 1612 | return error; |
e598d843 | 1613 | } |
cc0a9843 TM |
1614 | dprintk("%s: handled error %d for server %s\n", __func__, error, |
1615 | clp->cl_hostname); | |
4f38e4aa | 1616 | return 0; |
e598d843 TM |
1617 | } |
1618 | ||
02860014 | 1619 | static int nfs4_do_reclaim(struct nfs_client *clp, const struct nfs4_state_recovery_ops *ops) |
1da177e4 | 1620 | { |
24d292b8 CL |
1621 | struct nfs4_state_owner *sp; |
1622 | struct nfs_server *server; | |
9f958ab8 | 1623 | struct rb_node *pos; |
1da177e4 LT |
1624 | int status = 0; |
1625 | ||
7eff03ae | 1626 | restart: |
24d292b8 CL |
1627 | rcu_read_lock(); |
1628 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { | |
0aaaf5c4 | 1629 | nfs4_purge_state_owners(server); |
24d292b8 CL |
1630 | spin_lock(&clp->cl_lock); |
1631 | for (pos = rb_first(&server->state_owners); | |
1632 | pos != NULL; | |
1633 | pos = rb_next(pos)) { | |
1634 | sp = rb_entry(pos, | |
1635 | struct nfs4_state_owner, so_server_node); | |
1636 | if (!test_and_clear_bit(ops->owner_flag_bit, | |
1637 | &sp->so_flags)) | |
1638 | continue; | |
1639 | atomic_inc(&sp->so_count); | |
1640 | spin_unlock(&clp->cl_lock); | |
1641 | rcu_read_unlock(); | |
1642 | ||
1643 | status = nfs4_reclaim_open_state(sp, ops); | |
1644 | if (status < 0) { | |
1645 | set_bit(ops->owner_flag_bit, &sp->so_flags); | |
1646 | nfs4_put_state_owner(sp); | |
1647 | return nfs4_recovery_handle_error(clp, status); | |
1648 | } | |
1649 | ||
7eff03ae | 1650 | nfs4_put_state_owner(sp); |
24d292b8 | 1651 | goto restart; |
7eff03ae | 1652 | } |
24d292b8 | 1653 | spin_unlock(&clp->cl_lock); |
02860014 | 1654 | } |
24d292b8 | 1655 | rcu_read_unlock(); |
02860014 TM |
1656 | return status; |
1657 | } | |
1658 | ||
1659 | static int nfs4_check_lease(struct nfs_client *clp) | |
1660 | { | |
1661 | struct rpc_cred *cred; | |
c48f4f35 TM |
1662 | const struct nfs4_state_maintenance_ops *ops = |
1663 | clp->cl_mvops->state_renewal_ops; | |
4f38e4aa | 1664 | int status; |
1da177e4 | 1665 | |
0f605b56 TM |
1666 | /* Is the client already known to have an expired lease? */ |
1667 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) | |
1668 | return 0; | |
a7b72103 AA |
1669 | spin_lock(&clp->cl_lock); |
1670 | cred = ops->get_state_renewal_cred_locked(clp); | |
1671 | spin_unlock(&clp->cl_lock); | |
0f605b56 TM |
1672 | if (cred == NULL) { |
1673 | cred = nfs4_get_setclientid_cred(clp); | |
4f38e4aa | 1674 | status = -ENOKEY; |
0f605b56 TM |
1675 | if (cred == NULL) |
1676 | goto out; | |
286d7d6a | 1677 | } |
8e69514f | 1678 | status = ops->renew_lease(clp, cred); |
0f605b56 TM |
1679 | put_rpccred(cred); |
1680 | out: | |
4f7cdf18 | 1681 | return nfs4_recovery_handle_error(clp, status); |
02860014 TM |
1682 | } |
1683 | ||
47b803c8 AA |
1684 | /* Set NFS4CLNT_LEASE_EXPIRED and reclaim reboot state for all v4.0 errors |
1685 | * and for recoverable errors on EXCHANGE_ID for v4.1 | |
2a6ee6aa TM |
1686 | */ |
1687 | static int nfs4_handle_reclaim_lease_error(struct nfs_client *clp, int status) | |
1688 | { | |
1689 | switch (status) { | |
89a21736 TM |
1690 | case -NFS4ERR_SEQ_MISORDERED: |
1691 | if (test_and_set_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) | |
1692 | return -ESERVERFAULT; | |
1693 | /* Lease confirmation error: retry after purging the lease */ | |
1694 | ssleep(1); | |
47b803c8 AA |
1695 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
1696 | break; | |
2a6ee6aa TM |
1697 | case -NFS4ERR_STALE_CLIENTID: |
1698 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); | |
47b803c8 AA |
1699 | nfs4_state_clear_reclaim_reboot(clp); |
1700 | nfs4_state_start_reclaim_reboot(clp); | |
2a6ee6aa | 1701 | break; |
de734831 CL |
1702 | case -NFS4ERR_CLID_INUSE: |
1703 | pr_err("NFS: Server %s reports our clientid is in use\n", | |
1704 | clp->cl_hostname); | |
1705 | nfs_mark_client_ready(clp, -EPERM); | |
1706 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); | |
1707 | return -EPERM; | |
2a6ee6aa TM |
1708 | case -EACCES: |
1709 | if (clp->cl_machine_cred == NULL) | |
1710 | return -EACCES; | |
1711 | /* Handle case where the user hasn't set up machine creds */ | |
1712 | nfs4_clear_machine_cred(clp); | |
1713 | case -NFS4ERR_DELAY: | |
1714 | case -ETIMEDOUT: | |
1715 | case -EAGAIN: | |
1716 | ssleep(1); | |
1717 | break; | |
1718 | ||
1719 | case -NFS4ERR_MINOR_VERS_MISMATCH: | |
1720 | if (clp->cl_cons_state == NFS_CS_SESSION_INITING) | |
1721 | nfs_mark_client_ready(clp, -EPROTONOSUPPORT); | |
cc0a9843 TM |
1722 | dprintk("%s: exit with error %d for server %s\n", |
1723 | __func__, -EPROTONOSUPPORT, clp->cl_hostname); | |
2a6ee6aa TM |
1724 | return -EPROTONOSUPPORT; |
1725 | case -EKEYEXPIRED: | |
1726 | nfs4_warn_keyexpired(clp->cl_hostname); | |
1727 | case -NFS4ERR_NOT_SAME: /* FixMe: implement recovery | |
1728 | * in nfs4_exchange_id */ | |
1729 | default: | |
cc0a9843 TM |
1730 | dprintk("%s: exit with error %d for server %s\n", __func__, |
1731 | status, clp->cl_hostname); | |
2a6ee6aa TM |
1732 | return status; |
1733 | } | |
1734 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
cc0a9843 TM |
1735 | dprintk("%s: handled error %d for server %s\n", __func__, status, |
1736 | clp->cl_hostname); | |
2a6ee6aa TM |
1737 | return 0; |
1738 | } | |
1739 | ||
b42353ff | 1740 | static int nfs4_establish_lease(struct nfs_client *clp) |
02860014 TM |
1741 | { |
1742 | struct rpc_cred *cred; | |
c48f4f35 TM |
1743 | const struct nfs4_state_recovery_ops *ops = |
1744 | clp->cl_mvops->reboot_recovery_ops; | |
2a6ee6aa | 1745 | int status; |
02860014 | 1746 | |
90a16617 | 1747 | cred = ops->get_clid_cred(clp); |
2a6ee6aa TM |
1748 | if (cred == NULL) |
1749 | return -ENOENT; | |
1750 | status = ops->establish_clid(clp, cred); | |
1751 | put_rpccred(cred); | |
1752 | if (status != 0) | |
b42353ff TM |
1753 | return status; |
1754 | pnfs_destroy_all_layouts(clp); | |
1755 | return 0; | |
1756 | } | |
1757 | ||
6bbb4ae8 CL |
1758 | /* |
1759 | * Returns zero or a negative errno. NFS4ERR values are converted | |
1760 | * to local errno values. | |
1761 | */ | |
b42353ff TM |
1762 | static int nfs4_reclaim_lease(struct nfs_client *clp) |
1763 | { | |
1764 | int status; | |
1765 | ||
1766 | status = nfs4_establish_lease(clp); | |
1767 | if (status < 0) | |
1768 | return nfs4_handle_reclaim_lease_error(clp, status); | |
1769 | if (test_and_clear_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state)) | |
1770 | nfs4_state_start_reclaim_nograce(clp); | |
1771 | if (!test_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) | |
1772 | set_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state); | |
1773 | clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); | |
1774 | clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1775 | return 0; | |
1776 | } | |
1777 | ||
1778 | static int nfs4_purge_lease(struct nfs_client *clp) | |
1779 | { | |
1780 | int status; | |
1781 | ||
1782 | status = nfs4_establish_lease(clp); | |
1783 | if (status < 0) | |
2a6ee6aa | 1784 | return nfs4_handle_reclaim_lease_error(clp, status); |
b42353ff TM |
1785 | clear_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state); |
1786 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1787 | nfs4_state_start_reclaim_nograce(clp); | |
2a6ee6aa | 1788 | return 0; |
02860014 TM |
1789 | } |
1790 | ||
05f4c350 CL |
1791 | /** |
1792 | * nfs4_discover_server_trunking - Detect server IP address trunking | |
1793 | * | |
1794 | * @clp: nfs_client under test | |
1795 | * @result: OUT: found nfs_client, or clp | |
1796 | * | |
1797 | * Returns zero or a negative errno. If zero is returned, | |
1798 | * an nfs_client pointer is planted in "result". | |
1799 | * | |
1800 | * Note: since we are invoked in process context, and | |
1801 | * not from inside the state manager, we cannot use | |
1802 | * nfs4_handle_reclaim_lease_error(). | |
1803 | */ | |
1804 | int nfs4_discover_server_trunking(struct nfs_client *clp, | |
1805 | struct nfs_client **result) | |
1806 | { | |
1807 | const struct nfs4_state_recovery_ops *ops = | |
1808 | clp->cl_mvops->reboot_recovery_ops; | |
1809 | rpc_authflavor_t *flavors, flav, save; | |
1810 | struct rpc_clnt *clnt; | |
1811 | struct rpc_cred *cred; | |
1812 | int i, len, status; | |
1813 | ||
1814 | dprintk("NFS: %s: testing '%s'\n", __func__, clp->cl_hostname); | |
1815 | ||
1816 | len = NFS_MAX_SECFLAVORS; | |
1817 | flavors = kcalloc(len, sizeof(*flavors), GFP_KERNEL); | |
1818 | if (flavors == NULL) { | |
1819 | status = -ENOMEM; | |
1820 | goto out; | |
1821 | } | |
1822 | len = rpcauth_list_flavors(flavors, len); | |
1823 | if (len < 0) { | |
1824 | status = len; | |
1825 | goto out_free; | |
1826 | } | |
1827 | clnt = clp->cl_rpcclient; | |
1828 | save = clnt->cl_auth->au_flavor; | |
1829 | i = 0; | |
1830 | ||
1831 | mutex_lock(&nfs_clid_init_mutex); | |
1832 | status = -ENOENT; | |
1833 | again: | |
1834 | cred = ops->get_clid_cred(clp); | |
1835 | if (cred == NULL) | |
1836 | goto out_unlock; | |
1837 | ||
1838 | status = ops->detect_trunking(clp, result, cred); | |
1839 | put_rpccred(cred); | |
1840 | switch (status) { | |
1841 | case 0: | |
1842 | break; | |
1843 | ||
1844 | case -EACCES: | |
1845 | if (clp->cl_machine_cred == NULL) | |
1846 | break; | |
1847 | /* Handle case where the user hasn't set up machine creds */ | |
1848 | nfs4_clear_machine_cred(clp); | |
1849 | case -NFS4ERR_DELAY: | |
1850 | case -ETIMEDOUT: | |
1851 | case -EAGAIN: | |
1852 | ssleep(1); | |
1853 | dprintk("NFS: %s after status %d, retrying\n", | |
1854 | __func__, status); | |
1855 | goto again; | |
1856 | ||
1857 | case -NFS4ERR_CLID_INUSE: | |
1858 | case -NFS4ERR_WRONGSEC: | |
1859 | status = -EPERM; | |
1860 | if (i >= len) | |
1861 | break; | |
1862 | ||
1863 | flav = flavors[i++]; | |
1864 | if (flav == save) | |
1865 | flav = flavors[i++]; | |
1866 | clnt = rpc_clone_client_set_auth(clnt, flav); | |
1867 | if (IS_ERR(clnt)) { | |
1868 | status = PTR_ERR(clnt); | |
1869 | break; | |
1870 | } | |
1871 | clp->cl_rpcclient = clnt; | |
1872 | goto again; | |
1873 | ||
1874 | case -NFS4ERR_MINOR_VERS_MISMATCH: | |
1875 | status = -EPROTONOSUPPORT; | |
1876 | break; | |
1877 | ||
1878 | case -EKEYEXPIRED: | |
1879 | nfs4_warn_keyexpired(clp->cl_hostname); | |
1880 | case -NFS4ERR_NOT_SAME: /* FixMe: implement recovery | |
1881 | * in nfs4_exchange_id */ | |
1882 | status = -EKEYEXPIRED; | |
1883 | } | |
1884 | ||
1885 | out_unlock: | |
1886 | mutex_unlock(&nfs_clid_init_mutex); | |
1887 | out_free: | |
1888 | kfree(flavors); | |
1889 | out: | |
1890 | dprintk("NFS: %s: status = %d\n", __func__, status); | |
1891 | return status; | |
1892 | } | |
1893 | ||
76db6d95 | 1894 | #ifdef CONFIG_NFS_V4_1 |
9f594791 | 1895 | void nfs4_schedule_session_recovery(struct nfs4_session *session, int err) |
0400a6b0 | 1896 | { |
444f72fe TM |
1897 | struct nfs_client *clp = session->clp; |
1898 | ||
9f594791 TM |
1899 | switch (err) { |
1900 | default: | |
1901 | set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); | |
1902 | break; | |
1903 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
1904 | set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); | |
1905 | } | |
444f72fe | 1906 | nfs4_schedule_lease_recovery(clp); |
0400a6b0 | 1907 | } |
cbdabc7f | 1908 | EXPORT_SYMBOL_GPL(nfs4_schedule_session_recovery); |
0400a6b0 | 1909 | |
b9efa1b2 AA |
1910 | void nfs41_handle_recall_slot(struct nfs_client *clp) |
1911 | { | |
1912 | set_bit(NFS4CLNT_RECALL_SLOT, &clp->cl_state); | |
cc0a9843 TM |
1913 | dprintk("%s: scheduling slot recall for server %s\n", __func__, |
1914 | clp->cl_hostname); | |
0400a6b0 | 1915 | nfs4_schedule_state_manager(clp); |
b9efa1b2 AA |
1916 | } |
1917 | ||
0f79fd6f TM |
1918 | static void nfs4_reset_all_state(struct nfs_client *clp) |
1919 | { | |
1920 | if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) == 0) { | |
2c820d9a | 1921 | set_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state); |
be0bfed0 | 1922 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
0f79fd6f | 1923 | nfs4_state_start_reclaim_nograce(clp); |
cc0a9843 TM |
1924 | dprintk("%s: scheduling reset of all state for server %s!\n", |
1925 | __func__, clp->cl_hostname); | |
0400a6b0 | 1926 | nfs4_schedule_state_manager(clp); |
0f79fd6f TM |
1927 | } |
1928 | } | |
1929 | ||
1930 | static void nfs41_handle_server_reboot(struct nfs_client *clp) | |
1931 | { | |
1932 | if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) == 0) { | |
1933 | nfs4_state_start_reclaim_reboot(clp); | |
cc0a9843 TM |
1934 | dprintk("%s: server %s rebooted!\n", __func__, |
1935 | clp->cl_hostname); | |
0400a6b0 | 1936 | nfs4_schedule_state_manager(clp); |
0f79fd6f TM |
1937 | } |
1938 | } | |
1939 | ||
1940 | static void nfs41_handle_state_revoked(struct nfs_client *clp) | |
1941 | { | |
0f79fd6f | 1942 | nfs4_reset_all_state(clp); |
cc0a9843 | 1943 | dprintk("%s: state revoked on server %s\n", __func__, clp->cl_hostname); |
0f79fd6f TM |
1944 | } |
1945 | ||
1946 | static void nfs41_handle_recallable_state_revoked(struct nfs_client *clp) | |
1947 | { | |
1948 | /* This will need to handle layouts too */ | |
1949 | nfs_expire_all_delegations(clp); | |
cc0a9843 TM |
1950 | dprintk("%s: Recallable state revoked on server %s!\n", __func__, |
1951 | clp->cl_hostname); | |
0f79fd6f TM |
1952 | } |
1953 | ||
a9e64442 | 1954 | static void nfs41_handle_backchannel_fault(struct nfs_client *clp) |
0f79fd6f TM |
1955 | { |
1956 | nfs_expire_all_delegations(clp); | |
1957 | if (test_and_set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state) == 0) | |
0400a6b0 | 1958 | nfs4_schedule_state_manager(clp); |
cc0a9843 TM |
1959 | dprintk("%s: server %s declared a backchannel fault\n", __func__, |
1960 | clp->cl_hostname); | |
0f79fd6f TM |
1961 | } |
1962 | ||
a9e64442 WAA |
1963 | static void nfs41_handle_cb_path_down(struct nfs_client *clp) |
1964 | { | |
1965 | if (test_and_set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, | |
1966 | &clp->cl_state) == 0) | |
1967 | nfs4_schedule_state_manager(clp); | |
1968 | } | |
1969 | ||
0629e370 AB |
1970 | void nfs41_handle_sequence_flag_errors(struct nfs_client *clp, u32 flags) |
1971 | { | |
1972 | if (!flags) | |
1973 | return; | |
2c820d9a CL |
1974 | |
1975 | dprintk("%s: \"%s\" (client ID %llx) flags=0x%08x\n", | |
1976 | __func__, clp->cl_hostname, clp->cl_clientid, flags); | |
1977 | ||
111d489f | 1978 | if (flags & SEQ4_STATUS_RESTART_RECLAIM_NEEDED) |
0f79fd6f | 1979 | nfs41_handle_server_reboot(clp); |
111d489f | 1980 | if (flags & (SEQ4_STATUS_EXPIRED_ALL_STATE_REVOKED | |
0629e370 AB |
1981 | SEQ4_STATUS_EXPIRED_SOME_STATE_REVOKED | |
1982 | SEQ4_STATUS_ADMIN_STATE_REVOKED | | |
0f79fd6f TM |
1983 | SEQ4_STATUS_LEASE_MOVED)) |
1984 | nfs41_handle_state_revoked(clp); | |
111d489f | 1985 | if (flags & SEQ4_STATUS_RECALLABLE_STATE_REVOKED) |
0f79fd6f | 1986 | nfs41_handle_recallable_state_revoked(clp); |
a9e64442 WAA |
1987 | if (flags & SEQ4_STATUS_BACKCHANNEL_FAULT) |
1988 | nfs41_handle_backchannel_fault(clp); | |
1989 | else if (flags & (SEQ4_STATUS_CB_PATH_DOWN | | |
1990 | SEQ4_STATUS_CB_PATH_DOWN_SESSION)) | |
0f79fd6f | 1991 | nfs41_handle_cb_path_down(clp); |
0629e370 AB |
1992 | } |
1993 | ||
c3fad1b1 AA |
1994 | static int nfs4_reset_session(struct nfs_client *clp) |
1995 | { | |
848f5bda | 1996 | struct rpc_cred *cred; |
c3fad1b1 AA |
1997 | int status; |
1998 | ||
1a47e7a6 TM |
1999 | if (!nfs4_has_session(clp)) |
2000 | return 0; | |
38045412 | 2001 | nfs4_begin_drain_session(clp); |
848f5bda TM |
2002 | cred = nfs4_get_exchange_id_cred(clp); |
2003 | status = nfs4_proc_destroy_session(clp->cl_session, cred); | |
c3fad1b1 AA |
2004 | if (status && status != -NFS4ERR_BADSESSION && |
2005 | status != -NFS4ERR_DEADSESSION) { | |
f455848a | 2006 | status = nfs4_recovery_handle_error(clp, status); |
c3fad1b1 AA |
2007 | goto out; |
2008 | } | |
2009 | ||
2010 | memset(clp->cl_session->sess_id.data, 0, NFS4_MAX_SESSIONID_LEN); | |
848f5bda | 2011 | status = nfs4_proc_create_session(clp, cred); |
41f54a55 | 2012 | if (status) { |
cc0a9843 TM |
2013 | dprintk("%s: session reset failed with status %d for server %s!\n", |
2014 | __func__, status, clp->cl_hostname); | |
f2c1b510 | 2015 | status = nfs4_handle_reclaim_lease_error(clp, status); |
41f54a55 AA |
2016 | goto out; |
2017 | } | |
bda197f5 | 2018 | nfs41_finish_session_reset(clp); |
cc0a9843 TM |
2019 | dprintk("%s: session reset was successful for server %s!\n", |
2020 | __func__, clp->cl_hostname); | |
41f54a55 | 2021 | out: |
848f5bda TM |
2022 | if (cred) |
2023 | put_rpccred(cred); | |
c3fad1b1 AA |
2024 | return status; |
2025 | } | |
76db6d95 | 2026 | |
b9efa1b2 AA |
2027 | static int nfs4_recall_slot(struct nfs_client *clp) |
2028 | { | |
60f00153 | 2029 | struct nfs4_slot_table *fc_tbl; |
b9efa1b2 AA |
2030 | struct nfs4_slot *new, *old; |
2031 | int i; | |
2032 | ||
60f00153 TM |
2033 | if (!nfs4_has_session(clp)) |
2034 | return 0; | |
b9efa1b2 | 2035 | nfs4_begin_drain_session(clp); |
60f00153 | 2036 | fc_tbl = &clp->cl_session->fc_slot_table; |
b9efa1b2 | 2037 | new = kmalloc(fc_tbl->target_max_slots * sizeof(struct nfs4_slot), |
8535b2be | 2038 | GFP_NOFS); |
b9efa1b2 AA |
2039 | if (!new) |
2040 | return -ENOMEM; | |
2041 | ||
2042 | spin_lock(&fc_tbl->slot_tbl_lock); | |
2043 | for (i = 0; i < fc_tbl->target_max_slots; i++) | |
2044 | new[i].seq_nr = fc_tbl->slots[i].seq_nr; | |
2045 | old = fc_tbl->slots; | |
2046 | fc_tbl->slots = new; | |
2047 | fc_tbl->max_slots = fc_tbl->target_max_slots; | |
2048 | fc_tbl->target_max_slots = 0; | |
60f00153 | 2049 | clp->cl_session->fc_attrs.max_reqs = fc_tbl->max_slots; |
b9efa1b2 AA |
2050 | spin_unlock(&fc_tbl->slot_tbl_lock); |
2051 | ||
2052 | kfree(old); | |
b9efa1b2 AA |
2053 | return 0; |
2054 | } | |
2055 | ||
a9e64442 WAA |
2056 | static int nfs4_bind_conn_to_session(struct nfs_client *clp) |
2057 | { | |
2cf047c9 TM |
2058 | struct rpc_cred *cred; |
2059 | int ret; | |
2060 | ||
1a47e7a6 TM |
2061 | if (!nfs4_has_session(clp)) |
2062 | return 0; | |
43ac544c | 2063 | nfs4_begin_drain_session(clp); |
2cf047c9 TM |
2064 | cred = nfs4_get_exchange_id_cred(clp); |
2065 | ret = nfs4_proc_bind_conn_to_session(clp, cred); | |
2066 | if (cred) | |
2067 | put_rpccred(cred); | |
43ac544c | 2068 | clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); |
bf674c82 TM |
2069 | switch (ret) { |
2070 | case 0: | |
cc0a9843 TM |
2071 | dprintk("%s: bind_conn_to_session was successful for server %s!\n", |
2072 | __func__, clp->cl_hostname); | |
bf674c82 TM |
2073 | break; |
2074 | case -NFS4ERR_DELAY: | |
2075 | ssleep(1); | |
2076 | set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); | |
2077 | break; | |
2078 | default: | |
2079 | return nfs4_recovery_handle_error(clp, ret); | |
2080 | } | |
2081 | return 0; | |
a9e64442 | 2082 | } |
76db6d95 | 2083 | #else /* CONFIG_NFS_V4_1 */ |
c3fad1b1 | 2084 | static int nfs4_reset_session(struct nfs_client *clp) { return 0; } |
5601a00d | 2085 | static int nfs4_end_drain_session(struct nfs_client *clp) { return 0; } |
b9efa1b2 | 2086 | static int nfs4_recall_slot(struct nfs_client *clp) { return 0; } |
a9e64442 WAA |
2087 | |
2088 | static int nfs4_bind_conn_to_session(struct nfs_client *clp) | |
2089 | { | |
2090 | return 0; | |
2091 | } | |
76db6d95 AA |
2092 | #endif /* CONFIG_NFS_V4_1 */ |
2093 | ||
e005e804 | 2094 | static void nfs4_state_manager(struct nfs_client *clp) |
02860014 | 2095 | { |
02860014 | 2096 | int status = 0; |
8ed27d4f | 2097 | const char *section = "", *section_sep = ""; |
02860014 | 2098 | |
02860014 | 2099 | /* Ensure exclusive access to NFSv4 state */ |
47c2199b | 2100 | do { |
2c820d9a | 2101 | if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) { |
8ed27d4f | 2102 | section = "purge state"; |
b42353ff | 2103 | status = nfs4_purge_lease(clp); |
2a6ee6aa TM |
2104 | if (status < 0) |
2105 | goto out_error; | |
b42353ff | 2106 | continue; |
2c820d9a CL |
2107 | } |
2108 | ||
b42353ff | 2109 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) { |
8ed27d4f | 2110 | section = "lease expired"; |
b79a4a1b TM |
2111 | /* We're going to have to re-establish a clientid */ |
2112 | status = nfs4_reclaim_lease(clp); | |
2a6ee6aa | 2113 | if (status < 0) |
b79a4a1b | 2114 | goto out_error; |
b42353ff | 2115 | continue; |
e598d843 TM |
2116 | } |
2117 | ||
2118 | if (test_and_clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state)) { | |
8ed27d4f | 2119 | section = "check lease"; |
e598d843 | 2120 | status = nfs4_check_lease(clp); |
4f38e4aa TM |
2121 | if (status < 0) |
2122 | goto out_error; | |
b6d408ba | 2123 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
e598d843 | 2124 | continue; |
b79a4a1b | 2125 | } |
b6d408ba | 2126 | |
c3fad1b1 | 2127 | /* Initialize or reset the session */ |
1a47e7a6 | 2128 | if (test_and_clear_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state)) { |
8ed27d4f | 2129 | section = "reset session"; |
4d643d1d | 2130 | status = nfs4_reset_session(clp); |
b6d408ba TM |
2131 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
2132 | continue; | |
2133 | if (status < 0) | |
76db6d95 | 2134 | goto out_error; |
76db6d95 | 2135 | } |
b6d408ba | 2136 | |
a9e64442 WAA |
2137 | /* Send BIND_CONN_TO_SESSION */ |
2138 | if (test_and_clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION, | |
1a47e7a6 | 2139 | &clp->cl_state)) { |
8ed27d4f | 2140 | section = "bind conn to session"; |
a9e64442 WAA |
2141 | status = nfs4_bind_conn_to_session(clp); |
2142 | if (status < 0) | |
2143 | goto out_error; | |
bf674c82 | 2144 | continue; |
a9e64442 WAA |
2145 | } |
2146 | ||
1a2dd948 | 2147 | /* Recall session slots */ |
60f00153 | 2148 | if (test_and_clear_bit(NFS4CLNT_RECALL_SLOT, &clp->cl_state)) { |
1a2dd948 TM |
2149 | section = "recall slot"; |
2150 | status = nfs4_recall_slot(clp); | |
2151 | if (status < 0) | |
2152 | goto out_error; | |
2153 | continue; | |
2154 | } | |
2155 | ||
b79a4a1b | 2156 | /* First recover reboot state... */ |
e345e88a | 2157 | if (test_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) { |
8ed27d4f | 2158 | section = "reclaim reboot"; |
591d71cb | 2159 | status = nfs4_do_reclaim(clp, |
c48f4f35 | 2160 | clp->cl_mvops->reboot_recovery_ops); |
b6d408ba | 2161 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) || |
6df08189 | 2162 | test_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state)) |
c3fad1b1 | 2163 | continue; |
b79a4a1b | 2164 | nfs4_state_end_reclaim_reboot(clp); |
b6d408ba TM |
2165 | if (test_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) |
2166 | continue; | |
2167 | if (status < 0) | |
2168 | goto out_error; | |
02860014 TM |
2169 | } |
2170 | ||
b79a4a1b TM |
2171 | /* Now recover expired state... */ |
2172 | if (test_and_clear_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) { | |
8ed27d4f | 2173 | section = "reclaim nograce"; |
591d71cb | 2174 | status = nfs4_do_reclaim(clp, |
c48f4f35 | 2175 | clp->cl_mvops->nograce_recovery_ops); |
b6d408ba | 2176 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) || |
6df08189 | 2177 | test_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state) || |
b6d408ba TM |
2178 | test_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) |
2179 | continue; | |
2180 | if (status < 0) | |
b79a4a1b | 2181 | goto out_error; |
1da177e4 | 2182 | } |
707fb4b3 | 2183 | |
5601a00d | 2184 | nfs4_end_drain_session(clp); |
707fb4b3 TM |
2185 | if (test_and_clear_bit(NFS4CLNT_DELEGRETURN, &clp->cl_state)) { |
2186 | nfs_client_return_marked_delegations(clp); | |
2187 | continue; | |
2188 | } | |
e005e804 TM |
2189 | |
2190 | nfs4_clear_state_manager_bit(clp); | |
f3c76491 TM |
2191 | /* Did we race with an attempt to give us more work? */ |
2192 | if (clp->cl_state == 0) | |
2193 | break; | |
2194 | if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) != 0) | |
2195 | break; | |
47c2199b | 2196 | } while (atomic_read(&clp->cl_count) > 1); |
e005e804 | 2197 | return; |
1da177e4 | 2198 | out_error: |
8ed27d4f WAA |
2199 | if (strlen(section)) |
2200 | section_sep = ": "; | |
2201 | pr_warn_ratelimited("NFS: state manager%s%s failed on NFSv4 server %s" | |
2202 | " with error %d\n", section_sep, section, | |
2203 | clp->cl_hostname, -status); | |
ffe5a830 | 2204 | ssleep(1); |
5601a00d | 2205 | nfs4_end_drain_session(clp); |
e005e804 TM |
2206 | nfs4_clear_state_manager_bit(clp); |
2207 | } | |
2208 | ||
2209 | static int nfs4_run_state_manager(void *ptr) | |
2210 | { | |
2211 | struct nfs_client *clp = ptr; | |
2212 | ||
2213 | allow_signal(SIGKILL); | |
2214 | nfs4_state_manager(clp); | |
2215 | nfs_put_client(clp); | |
2216 | module_put_and_exit(0); | |
2217 | return 0; | |
1da177e4 LT |
2218 | } |
2219 | ||
2220 | /* | |
2221 | * Local variables: | |
2222 | * c-basic-offset: 8 | |
2223 | * End: | |
2224 | */ |