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 | }; | |
124 | unsigned short port; | |
125 | int status; | |
126 | ||
127 | port = nfs_callback_tcpport; | |
128 | if (clp->cl_addr.ss_family == AF_INET6) | |
129 | port = nfs_callback_tcpport6; | |
130 | ||
131 | status = nfs4_proc_setclientid(clp, NFS4_CALLBACK, port, cred, &clid); | |
132 | if (status != 0) | |
133 | goto out; | |
134 | clp->cl_clientid = clid.clientid; | |
135 | clp->cl_confirm = clid.confirm; | |
136 | ||
137 | status = nfs40_walk_client_list(clp, result, cred); | |
138 | switch (status) { | |
139 | case -NFS4ERR_STALE_CLIENTID: | |
140 | set_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); | |
141 | case 0: | |
142 | /* Sustain the lease, even if it's empty. If the clientid4 | |
143 | * goes stale it's of no use for trunking discovery. */ | |
144 | nfs4_schedule_state_renewal(*result); | |
145 | break; | |
146 | } | |
147 | ||
148 | out: | |
149 | return status; | |
150 | } | |
151 | ||
a7b72103 | 152 | struct rpc_cred *nfs4_get_machine_cred_locked(struct nfs_client *clp) |
a2b2bb88 TM |
153 | { |
154 | struct rpc_cred *cred = NULL; | |
155 | ||
a2b2bb88 TM |
156 | if (clp->cl_machine_cred != NULL) |
157 | cred = get_rpccred(clp->cl_machine_cred); | |
a2b2bb88 TM |
158 | return cred; |
159 | } | |
160 | ||
161 | static void nfs4_clear_machine_cred(struct nfs_client *clp) | |
162 | { | |
163 | struct rpc_cred *cred; | |
164 | ||
165 | spin_lock(&clp->cl_lock); | |
166 | cred = clp->cl_machine_cred; | |
167 | clp->cl_machine_cred = NULL; | |
168 | spin_unlock(&clp->cl_lock); | |
169 | if (cred != NULL) | |
170 | put_rpccred(cred); | |
171 | } | |
172 | ||
24d292b8 CL |
173 | static struct rpc_cred * |
174 | nfs4_get_renew_cred_server_locked(struct nfs_server *server) | |
b4454fe1 | 175 | { |
24d292b8 | 176 | struct rpc_cred *cred = NULL; |
b4454fe1 | 177 | struct nfs4_state_owner *sp; |
9f958ab8 | 178 | struct rb_node *pos; |
b4454fe1 | 179 | |
24d292b8 CL |
180 | for (pos = rb_first(&server->state_owners); |
181 | pos != NULL; | |
182 | pos = rb_next(pos)) { | |
183 | sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); | |
b4454fe1 TM |
184 | if (list_empty(&sp->so_states)) |
185 | continue; | |
186 | cred = get_rpccred(sp->so_cred); | |
187 | break; | |
188 | } | |
189 | return cred; | |
190 | } | |
191 | ||
24d292b8 CL |
192 | /** |
193 | * nfs4_get_renew_cred_locked - Acquire credential for a renew operation | |
194 | * @clp: client state handle | |
195 | * | |
196 | * Returns an rpc_cred with reference count bumped, or NULL. | |
197 | * Caller must hold clp->cl_lock. | |
198 | */ | |
199 | struct rpc_cred *nfs4_get_renew_cred_locked(struct nfs_client *clp) | |
200 | { | |
201 | struct rpc_cred *cred = NULL; | |
202 | struct nfs_server *server; | |
203 | ||
e49a29bd SP |
204 | /* Use machine credentials if available */ |
205 | cred = nfs4_get_machine_cred_locked(clp); | |
206 | if (cred != NULL) | |
207 | goto out; | |
208 | ||
24d292b8 CL |
209 | rcu_read_lock(); |
210 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { | |
211 | cred = nfs4_get_renew_cred_server_locked(server); | |
212 | if (cred != NULL) | |
213 | break; | |
214 | } | |
215 | rcu_read_unlock(); | |
e49a29bd SP |
216 | |
217 | out: | |
24d292b8 CL |
218 | return cred; |
219 | } | |
220 | ||
b4b82607 AA |
221 | #if defined(CONFIG_NFS_V4_1) |
222 | ||
9430fb6b RL |
223 | static int nfs41_setup_state_renewal(struct nfs_client *clp) |
224 | { | |
225 | int status; | |
226 | struct nfs_fsinfo fsinfo; | |
227 | ||
d6fb79d4 AA |
228 | if (!test_bit(NFS_CS_CHECK_LEASE_TIME, &clp->cl_res_state)) { |
229 | nfs4_schedule_state_renewal(clp); | |
230 | return 0; | |
231 | } | |
232 | ||
9430fb6b RL |
233 | status = nfs4_proc_get_lease_time(clp, &fsinfo); |
234 | if (status == 0) { | |
235 | /* Update lease time and schedule renewal */ | |
236 | spin_lock(&clp->cl_lock); | |
237 | clp->cl_lease_time = fsinfo.lease_time * HZ; | |
238 | clp->cl_last_renewal = jiffies; | |
239 | spin_unlock(&clp->cl_lock); | |
240 | ||
241 | nfs4_schedule_state_renewal(clp); | |
242 | } | |
243 | ||
244 | return status; | |
245 | } | |
246 | ||
42acd021 AA |
247 | /* |
248 | * Back channel returns NFS4ERR_DELAY for new requests when | |
249 | * NFS4_SESSION_DRAINING is set so there is no work to be done when draining | |
250 | * is ended. | |
251 | */ | |
5601a00d | 252 | static void nfs4_end_drain_session(struct nfs_client *clp) |
9dfdf404 | 253 | { |
5601a00d | 254 | struct nfs4_session *ses = clp->cl_session; |
961a828d | 255 | struct nfs4_slot_table *tbl; |
689cf5c1 AB |
256 | int max_slots; |
257 | ||
a2118c33 TM |
258 | if (ses == NULL) |
259 | return; | |
961a828d | 260 | tbl = &ses->fc_slot_table; |
a2118c33 | 261 | if (test_and_clear_bit(NFS4_SESSION_DRAINING, &ses->session_state)) { |
961a828d TM |
262 | spin_lock(&tbl->slot_tbl_lock); |
263 | max_slots = tbl->max_slots; | |
689cf5c1 | 264 | while (max_slots--) { |
961a828d TM |
265 | if (rpc_wake_up_first(&tbl->slot_tbl_waitq, |
266 | nfs4_set_task_privileged, | |
267 | NULL) == NULL) | |
689cf5c1 | 268 | break; |
689cf5c1 | 269 | } |
961a828d | 270 | spin_unlock(&tbl->slot_tbl_lock); |
689cf5c1 | 271 | } |
9dfdf404 RL |
272 | } |
273 | ||
42acd021 | 274 | static int nfs4_wait_on_slot_tbl(struct nfs4_slot_table *tbl) |
9dfdf404 | 275 | { |
9dfdf404 | 276 | spin_lock(&tbl->slot_tbl_lock); |
b6bf6e7d | 277 | if (tbl->highest_used_slotid != NFS4_NO_SLOT) { |
42acd021 | 278 | INIT_COMPLETION(tbl->complete); |
9dfdf404 | 279 | spin_unlock(&tbl->slot_tbl_lock); |
42acd021 | 280 | return wait_for_completion_interruptible(&tbl->complete); |
9dfdf404 RL |
281 | } |
282 | spin_unlock(&tbl->slot_tbl_lock); | |
283 | return 0; | |
284 | } | |
285 | ||
42acd021 AA |
286 | static int nfs4_begin_drain_session(struct nfs_client *clp) |
287 | { | |
288 | struct nfs4_session *ses = clp->cl_session; | |
289 | int ret = 0; | |
290 | ||
291 | set_bit(NFS4_SESSION_DRAINING, &ses->session_state); | |
292 | /* back channel */ | |
293 | ret = nfs4_wait_on_slot_tbl(&ses->bc_slot_table); | |
294 | if (ret) | |
295 | return ret; | |
296 | /* fore channel */ | |
297 | return nfs4_wait_on_slot_tbl(&ses->fc_slot_table); | |
298 | } | |
299 | ||
bda197f5 TM |
300 | static void nfs41_finish_session_reset(struct nfs_client *clp) |
301 | { | |
302 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); | |
303 | clear_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); | |
304 | /* create_session negotiated new slot table */ | |
305 | clear_bit(NFS4CLNT_RECALL_SLOT, &clp->cl_state); | |
306 | clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); | |
307 | nfs41_setup_state_renewal(clp); | |
308 | } | |
309 | ||
4d643d1d AA |
310 | int nfs41_init_clientid(struct nfs_client *clp, struct rpc_cred *cred) |
311 | { | |
312 | int status; | |
313 | ||
fd954ae1 TM |
314 | if (test_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state)) |
315 | goto do_confirm; | |
38045412 | 316 | nfs4_begin_drain_session(clp); |
4d643d1d | 317 | status = nfs4_proc_exchange_id(clp, cred); |
9430fb6b RL |
318 | if (status != 0) |
319 | goto out; | |
fd954ae1 TM |
320 | set_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
321 | do_confirm: | |
848f5bda | 322 | status = nfs4_proc_create_session(clp, cred); |
9430fb6b RL |
323 | if (status != 0) |
324 | goto out; | |
bda197f5 | 325 | nfs41_finish_session_reset(clp); |
9430fb6b RL |
326 | nfs_mark_client_ready(clp, NFS_CS_READY); |
327 | out: | |
4d643d1d AA |
328 | return status; |
329 | } | |
330 | ||
05f4c350 CL |
331 | /** |
332 | * nfs41_discover_server_trunking - Detect server IP address trunking (mv1) | |
333 | * | |
334 | * @clp: nfs_client under test | |
335 | * @result: OUT: found nfs_client, or clp | |
336 | * @cred: credential to use for trunking test | |
337 | * | |
338 | * Returns NFS4_OK, a negative errno, or a negative NFS4ERR status. | |
339 | * If NFS4_OK is returned, an nfs_client pointer is planted in | |
340 | * "result". | |
341 | * | |
342 | * Note: The returned client may not yet be marked ready. | |
343 | */ | |
344 | int nfs41_discover_server_trunking(struct nfs_client *clp, | |
345 | struct nfs_client **result, | |
346 | struct rpc_cred *cred) | |
347 | { | |
348 | int status; | |
349 | ||
350 | status = nfs4_proc_exchange_id(clp, cred); | |
351 | if (status != NFS4_OK) | |
352 | return status; | |
353 | ||
354 | return nfs41_walk_client_list(clp, result, cred); | |
355 | } | |
356 | ||
b4b82607 AA |
357 | struct rpc_cred *nfs4_get_exchange_id_cred(struct nfs_client *clp) |
358 | { | |
359 | struct rpc_cred *cred; | |
360 | ||
361 | spin_lock(&clp->cl_lock); | |
362 | cred = nfs4_get_machine_cred_locked(clp); | |
363 | spin_unlock(&clp->cl_lock); | |
364 | return cred; | |
365 | } | |
366 | ||
367 | #endif /* CONFIG_NFS_V4_1 */ | |
368 | ||
24d292b8 CL |
369 | static struct rpc_cred * |
370 | nfs4_get_setclientid_cred_server(struct nfs_server *server) | |
286d7d6a | 371 | { |
24d292b8 CL |
372 | struct nfs_client *clp = server->nfs_client; |
373 | struct rpc_cred *cred = NULL; | |
286d7d6a | 374 | struct nfs4_state_owner *sp; |
9f958ab8 | 375 | struct rb_node *pos; |
24d292b8 CL |
376 | |
377 | spin_lock(&clp->cl_lock); | |
378 | pos = rb_first(&server->state_owners); | |
379 | if (pos != NULL) { | |
380 | sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); | |
381 | cred = get_rpccred(sp->so_cred); | |
382 | } | |
383 | spin_unlock(&clp->cl_lock); | |
384 | return cred; | |
385 | } | |
386 | ||
387 | /** | |
388 | * nfs4_get_setclientid_cred - Acquire credential for a setclientid operation | |
389 | * @clp: client state handle | |
390 | * | |
391 | * Returns an rpc_cred with reference count bumped, or NULL. | |
392 | */ | |
393 | struct rpc_cred *nfs4_get_setclientid_cred(struct nfs_client *clp) | |
394 | { | |
395 | struct nfs_server *server; | |
a2b2bb88 | 396 | struct rpc_cred *cred; |
286d7d6a | 397 | |
6dc9d57a TM |
398 | spin_lock(&clp->cl_lock); |
399 | cred = nfs4_get_machine_cred_locked(clp); | |
24d292b8 | 400 | spin_unlock(&clp->cl_lock); |
a2b2bb88 TM |
401 | if (cred != NULL) |
402 | goto out; | |
24d292b8 CL |
403 | |
404 | rcu_read_lock(); | |
405 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { | |
406 | cred = nfs4_get_setclientid_cred_server(server); | |
407 | if (cred != NULL) | |
408 | break; | |
286d7d6a | 409 | } |
24d292b8 CL |
410 | rcu_read_unlock(); |
411 | ||
a2b2bb88 TM |
412 | out: |
413 | return cred; | |
286d7d6a TM |
414 | } |
415 | ||
1da177e4 | 416 | static struct nfs4_state_owner * |
24d292b8 | 417 | nfs4_find_state_owner_locked(struct nfs_server *server, struct rpc_cred *cred) |
1da177e4 | 418 | { |
24d292b8 | 419 | struct rb_node **p = &server->state_owners.rb_node, |
9f958ab8 | 420 | *parent = NULL; |
414adf14 | 421 | struct nfs4_state_owner *sp; |
1da177e4 | 422 | |
9f958ab8 TM |
423 | while (*p != NULL) { |
424 | parent = *p; | |
24d292b8 | 425 | sp = rb_entry(parent, struct nfs4_state_owner, so_server_node); |
9f958ab8 TM |
426 | |
427 | if (cred < sp->so_cred) | |
428 | p = &parent->rb_left; | |
429 | else if (cred > sp->so_cred) | |
430 | p = &parent->rb_right; | |
431 | else { | |
0aaaf5c4 CL |
432 | if (!list_empty(&sp->so_lru)) |
433 | list_del_init(&sp->so_lru); | |
9f958ab8 | 434 | atomic_inc(&sp->so_count); |
414adf14 | 435 | return sp; |
9f958ab8 | 436 | } |
1da177e4 | 437 | } |
414adf14 | 438 | return NULL; |
1da177e4 LT |
439 | } |
440 | ||
9f958ab8 | 441 | static struct nfs4_state_owner * |
24d292b8 | 442 | nfs4_insert_state_owner_locked(struct nfs4_state_owner *new) |
9f958ab8 | 443 | { |
24d292b8 CL |
444 | struct nfs_server *server = new->so_server; |
445 | struct rb_node **p = &server->state_owners.rb_node, | |
9f958ab8 TM |
446 | *parent = NULL; |
447 | struct nfs4_state_owner *sp; | |
9157c31d | 448 | int err; |
9f958ab8 TM |
449 | |
450 | while (*p != NULL) { | |
451 | parent = *p; | |
24d292b8 | 452 | sp = rb_entry(parent, struct nfs4_state_owner, so_server_node); |
9f958ab8 TM |
453 | |
454 | if (new->so_cred < sp->so_cred) | |
455 | p = &parent->rb_left; | |
456 | else if (new->so_cred > sp->so_cred) | |
457 | p = &parent->rb_right; | |
458 | else { | |
0aaaf5c4 CL |
459 | if (!list_empty(&sp->so_lru)) |
460 | list_del_init(&sp->so_lru); | |
9f958ab8 TM |
461 | atomic_inc(&sp->so_count); |
462 | return sp; | |
463 | } | |
464 | } | |
48c22eb2 | 465 | err = ida_get_new(&server->openowner_id, &new->so_seqid.owner_id); |
9157c31d TM |
466 | if (err) |
467 | return ERR_PTR(err); | |
24d292b8 CL |
468 | rb_link_node(&new->so_server_node, parent, p); |
469 | rb_insert_color(&new->so_server_node, &server->state_owners); | |
9f958ab8 TM |
470 | return new; |
471 | } | |
472 | ||
473 | static void | |
24d292b8 | 474 | nfs4_remove_state_owner_locked(struct nfs4_state_owner *sp) |
9f958ab8 | 475 | { |
24d292b8 CL |
476 | struct nfs_server *server = sp->so_server; |
477 | ||
478 | if (!RB_EMPTY_NODE(&sp->so_server_node)) | |
479 | rb_erase(&sp->so_server_node, &server->state_owners); | |
48c22eb2 | 480 | ida_remove(&server->openowner_id, sp->so_seqid.owner_id); |
9f958ab8 TM |
481 | } |
482 | ||
7ba127ab TM |
483 | static void |
484 | nfs4_init_seqid_counter(struct nfs_seqid_counter *sc) | |
485 | { | |
95b72eb0 | 486 | sc->create_time = ktime_get(); |
7ba127ab TM |
487 | sc->flags = 0; |
488 | sc->counter = 0; | |
489 | spin_lock_init(&sc->lock); | |
490 | INIT_LIST_HEAD(&sc->list); | |
491 | rpc_init_wait_queue(&sc->wait, "Seqid_waitqueue"); | |
492 | } | |
493 | ||
494 | static void | |
495 | nfs4_destroy_seqid_counter(struct nfs_seqid_counter *sc) | |
496 | { | |
497 | rpc_destroy_wait_queue(&sc->wait); | |
498 | } | |
499 | ||
1da177e4 LT |
500 | /* |
501 | * nfs4_alloc_state_owner(): this is called on the OPEN or CREATE path to | |
502 | * create a new state_owner. | |
503 | * | |
504 | */ | |
505 | static struct nfs4_state_owner * | |
d1e284d5 TM |
506 | nfs4_alloc_state_owner(struct nfs_server *server, |
507 | struct rpc_cred *cred, | |
508 | gfp_t gfp_flags) | |
1da177e4 LT |
509 | { |
510 | struct nfs4_state_owner *sp; | |
511 | ||
d1e284d5 | 512 | sp = kzalloc(sizeof(*sp), gfp_flags); |
1da177e4 LT |
513 | if (!sp) |
514 | return NULL; | |
d1e284d5 TM |
515 | sp->so_server = server; |
516 | sp->so_cred = get_rpccred(cred); | |
ec073428 | 517 | spin_lock_init(&sp->so_lock); |
1da177e4 | 518 | INIT_LIST_HEAD(&sp->so_states); |
7ba127ab | 519 | nfs4_init_seqid_counter(&sp->so_seqid); |
1da177e4 | 520 | atomic_set(&sp->so_count, 1); |
0aaaf5c4 | 521 | INIT_LIST_HEAD(&sp->so_lru); |
1da177e4 LT |
522 | return sp; |
523 | } | |
524 | ||
1d2e88e7 | 525 | static void |
1da177e4 LT |
526 | nfs4_drop_state_owner(struct nfs4_state_owner *sp) |
527 | { | |
c77365c9 TM |
528 | struct rb_node *rb_node = &sp->so_server_node; |
529 | ||
530 | if (!RB_EMPTY_NODE(rb_node)) { | |
24d292b8 CL |
531 | struct nfs_server *server = sp->so_server; |
532 | struct nfs_client *clp = server->nfs_client; | |
9f958ab8 TM |
533 | |
534 | spin_lock(&clp->cl_lock); | |
c77365c9 TM |
535 | if (!RB_EMPTY_NODE(rb_node)) { |
536 | rb_erase(rb_node, &server->state_owners); | |
537 | RB_CLEAR_NODE(rb_node); | |
538 | } | |
9f958ab8 TM |
539 | spin_unlock(&clp->cl_lock); |
540 | } | |
1da177e4 LT |
541 | } |
542 | ||
0aaaf5c4 CL |
543 | static void nfs4_free_state_owner(struct nfs4_state_owner *sp) |
544 | { | |
7ba127ab | 545 | nfs4_destroy_seqid_counter(&sp->so_seqid); |
0aaaf5c4 CL |
546 | put_rpccred(sp->so_cred); |
547 | kfree(sp); | |
548 | } | |
549 | ||
550 | static void nfs4_gc_state_owners(struct nfs_server *server) | |
551 | { | |
552 | struct nfs_client *clp = server->nfs_client; | |
553 | struct nfs4_state_owner *sp, *tmp; | |
554 | unsigned long time_min, time_max; | |
555 | LIST_HEAD(doomed); | |
556 | ||
557 | spin_lock(&clp->cl_lock); | |
558 | time_max = jiffies; | |
559 | time_min = (long)time_max - (long)clp->cl_lease_time; | |
560 | list_for_each_entry_safe(sp, tmp, &server->state_owners_lru, so_lru) { | |
561 | /* NB: LRU is sorted so that oldest is at the head */ | |
562 | if (time_in_range(sp->so_expires, time_min, time_max)) | |
563 | break; | |
564 | list_move(&sp->so_lru, &doomed); | |
565 | nfs4_remove_state_owner_locked(sp); | |
566 | } | |
567 | spin_unlock(&clp->cl_lock); | |
568 | ||
569 | list_for_each_entry_safe(sp, tmp, &doomed, so_lru) { | |
570 | list_del(&sp->so_lru); | |
571 | nfs4_free_state_owner(sp); | |
572 | } | |
573 | } | |
574 | ||
24d292b8 CL |
575 | /** |
576 | * nfs4_get_state_owner - Look up a state owner given a credential | |
577 | * @server: nfs_server to search | |
578 | * @cred: RPC credential to match | |
579 | * | |
580 | * Returns a pointer to an instantiated nfs4_state_owner struct, or NULL. | |
581 | */ | |
582 | struct nfs4_state_owner *nfs4_get_state_owner(struct nfs_server *server, | |
d1e284d5 TM |
583 | struct rpc_cred *cred, |
584 | gfp_t gfp_flags) | |
1da177e4 | 585 | { |
7539bbab | 586 | struct nfs_client *clp = server->nfs_client; |
1da177e4 LT |
587 | struct nfs4_state_owner *sp, *new; |
588 | ||
1da177e4 | 589 | spin_lock(&clp->cl_lock); |
24d292b8 | 590 | sp = nfs4_find_state_owner_locked(server, cred); |
1da177e4 | 591 | spin_unlock(&clp->cl_lock); |
1da177e4 | 592 | if (sp != NULL) |
0aaaf5c4 | 593 | goto out; |
d1e284d5 | 594 | new = nfs4_alloc_state_owner(server, cred, gfp_flags); |
9f958ab8 | 595 | if (new == NULL) |
0aaaf5c4 | 596 | goto out; |
9157c31d TM |
597 | do { |
598 | if (ida_pre_get(&server->openowner_id, gfp_flags) == 0) | |
599 | break; | |
600 | spin_lock(&clp->cl_lock); | |
601 | sp = nfs4_insert_state_owner_locked(new); | |
602 | spin_unlock(&clp->cl_lock); | |
603 | } while (sp == ERR_PTR(-EAGAIN)); | |
d1e284d5 TM |
604 | if (sp != new) |
605 | nfs4_free_state_owner(new); | |
0aaaf5c4 CL |
606 | out: |
607 | nfs4_gc_state_owners(server); | |
9f958ab8 | 608 | return sp; |
1da177e4 LT |
609 | } |
610 | ||
24d292b8 CL |
611 | /** |
612 | * nfs4_put_state_owner - Release a nfs4_state_owner | |
613 | * @sp: state owner data to release | |
7bf97bc2 TM |
614 | * |
615 | * Note that we keep released state owners on an LRU | |
616 | * list. | |
617 | * This caches valid state owners so that they can be | |
618 | * reused, to avoid the OPEN_CONFIRM on minor version 0. | |
619 | * It also pins the uniquifier of dropped state owners for | |
620 | * a while, to ensure that those state owner names are | |
621 | * never reused. | |
24d292b8 | 622 | */ |
1da177e4 LT |
623 | void nfs4_put_state_owner(struct nfs4_state_owner *sp) |
624 | { | |
0aaaf5c4 CL |
625 | struct nfs_server *server = sp->so_server; |
626 | struct nfs_client *clp = server->nfs_client; | |
1da177e4 LT |
627 | |
628 | if (!atomic_dec_and_lock(&sp->so_count, &clp->cl_lock)) | |
629 | return; | |
0aaaf5c4 | 630 | |
7bf97bc2 TM |
631 | sp->so_expires = jiffies; |
632 | list_add_tail(&sp->so_lru, &server->state_owners_lru); | |
633 | spin_unlock(&clp->cl_lock); | |
0aaaf5c4 CL |
634 | } |
635 | ||
636 | /** | |
637 | * nfs4_purge_state_owners - Release all cached state owners | |
638 | * @server: nfs_server with cached state owners to release | |
639 | * | |
640 | * Called at umount time. Remaining state owners will be on | |
641 | * the LRU with ref count of zero. | |
642 | */ | |
643 | void nfs4_purge_state_owners(struct nfs_server *server) | |
644 | { | |
645 | struct nfs_client *clp = server->nfs_client; | |
646 | struct nfs4_state_owner *sp, *tmp; | |
647 | LIST_HEAD(doomed); | |
648 | ||
649 | spin_lock(&clp->cl_lock); | |
650 | list_for_each_entry_safe(sp, tmp, &server->state_owners_lru, so_lru) { | |
651 | list_move(&sp->so_lru, &doomed); | |
652 | nfs4_remove_state_owner_locked(sp); | |
653 | } | |
1da177e4 | 654 | spin_unlock(&clp->cl_lock); |
0aaaf5c4 CL |
655 | |
656 | list_for_each_entry_safe(sp, tmp, &doomed, so_lru) { | |
657 | list_del(&sp->so_lru); | |
658 | nfs4_free_state_owner(sp); | |
659 | } | |
1da177e4 LT |
660 | } |
661 | ||
662 | static struct nfs4_state * | |
663 | nfs4_alloc_open_state(void) | |
664 | { | |
665 | struct nfs4_state *state; | |
666 | ||
8535b2be | 667 | state = kzalloc(sizeof(*state), GFP_NOFS); |
1da177e4 LT |
668 | if (!state) |
669 | return NULL; | |
1da177e4 LT |
670 | atomic_set(&state->count, 1); |
671 | INIT_LIST_HEAD(&state->lock_states); | |
8d0a8a9d | 672 | spin_lock_init(&state->state_lock); |
8bda4e4c | 673 | seqlock_init(&state->seqlock); |
1da177e4 LT |
674 | return state; |
675 | } | |
676 | ||
4cecb76f | 677 | void |
dc0b027d | 678 | nfs4_state_set_mode_locked(struct nfs4_state *state, fmode_t fmode) |
4cecb76f | 679 | { |
dc0b027d | 680 | if (state->state == fmode) |
4cecb76f TM |
681 | return; |
682 | /* NB! List reordering - see the reclaim code for why. */ | |
dc0b027d TM |
683 | if ((fmode & FMODE_WRITE) != (state->state & FMODE_WRITE)) { |
684 | if (fmode & FMODE_WRITE) | |
4cecb76f TM |
685 | list_move(&state->open_states, &state->owner->so_states); |
686 | else | |
687 | list_move_tail(&state->open_states, &state->owner->so_states); | |
688 | } | |
dc0b027d | 689 | state->state = fmode; |
4cecb76f TM |
690 | } |
691 | ||
1da177e4 LT |
692 | static struct nfs4_state * |
693 | __nfs4_find_state_byowner(struct inode *inode, struct nfs4_state_owner *owner) | |
694 | { | |
695 | struct nfs_inode *nfsi = NFS_I(inode); | |
696 | struct nfs4_state *state; | |
697 | ||
698 | list_for_each_entry(state, &nfsi->open_states, inode_states) { | |
1c816efa | 699 | if (state->owner != owner) |
1da177e4 | 700 | continue; |
1c816efa | 701 | if (atomic_inc_not_zero(&state->count)) |
1da177e4 | 702 | return state; |
1da177e4 LT |
703 | } |
704 | return NULL; | |
705 | } | |
706 | ||
1da177e4 LT |
707 | static void |
708 | nfs4_free_open_state(struct nfs4_state *state) | |
709 | { | |
710 | kfree(state); | |
711 | } | |
712 | ||
713 | struct nfs4_state * | |
714 | nfs4_get_open_state(struct inode *inode, struct nfs4_state_owner *owner) | |
715 | { | |
716 | struct nfs4_state *state, *new; | |
717 | struct nfs_inode *nfsi = NFS_I(inode); | |
718 | ||
719 | spin_lock(&inode->i_lock); | |
720 | state = __nfs4_find_state_byowner(inode, owner); | |
721 | spin_unlock(&inode->i_lock); | |
722 | if (state) | |
723 | goto out; | |
724 | new = nfs4_alloc_open_state(); | |
ec073428 | 725 | spin_lock(&owner->so_lock); |
1da177e4 LT |
726 | spin_lock(&inode->i_lock); |
727 | state = __nfs4_find_state_byowner(inode, owner); | |
728 | if (state == NULL && new != NULL) { | |
729 | state = new; | |
1da177e4 LT |
730 | state->owner = owner; |
731 | atomic_inc(&owner->so_count); | |
732 | list_add(&state->inode_states, &nfsi->open_states); | |
0444d76a DC |
733 | ihold(inode); |
734 | state->inode = inode; | |
1da177e4 | 735 | spin_unlock(&inode->i_lock); |
ec073428 TM |
736 | /* Note: The reclaim code dictates that we add stateless |
737 | * and read-only stateids to the end of the list */ | |
738 | list_add_tail(&state->open_states, &owner->so_states); | |
739 | spin_unlock(&owner->so_lock); | |
1da177e4 LT |
740 | } else { |
741 | spin_unlock(&inode->i_lock); | |
ec073428 | 742 | spin_unlock(&owner->so_lock); |
1da177e4 LT |
743 | if (new) |
744 | nfs4_free_open_state(new); | |
745 | } | |
746 | out: | |
747 | return state; | |
748 | } | |
749 | ||
1da177e4 LT |
750 | void nfs4_put_open_state(struct nfs4_state *state) |
751 | { | |
752 | struct inode *inode = state->inode; | |
753 | struct nfs4_state_owner *owner = state->owner; | |
754 | ||
ec073428 | 755 | if (!atomic_dec_and_lock(&state->count, &owner->so_lock)) |
1da177e4 | 756 | return; |
ec073428 | 757 | spin_lock(&inode->i_lock); |
ba683031 | 758 | list_del(&state->inode_states); |
1da177e4 | 759 | list_del(&state->open_states); |
ec073428 TM |
760 | spin_unlock(&inode->i_lock); |
761 | spin_unlock(&owner->so_lock); | |
1da177e4 | 762 | iput(inode); |
1da177e4 LT |
763 | nfs4_free_open_state(state); |
764 | nfs4_put_state_owner(owner); | |
765 | } | |
766 | ||
767 | /* | |
83c9d41e | 768 | * Close the current file. |
1da177e4 | 769 | */ |
643168c2 | 770 | static void __nfs4_close(struct nfs4_state *state, |
8535b2be | 771 | fmode_t fmode, gfp_t gfp_mask, int wait) |
1da177e4 | 772 | { |
1da177e4 | 773 | struct nfs4_state_owner *owner = state->owner; |
003707c7 | 774 | int call_close = 0; |
dc0b027d | 775 | fmode_t newstate; |
1da177e4 LT |
776 | |
777 | atomic_inc(&owner->so_count); | |
1da177e4 | 778 | /* Protect against nfs4_find_state() */ |
ec073428 | 779 | spin_lock(&owner->so_lock); |
dc0b027d | 780 | switch (fmode & (FMODE_READ | FMODE_WRITE)) { |
e7616923 TM |
781 | case FMODE_READ: |
782 | state->n_rdonly--; | |
783 | break; | |
784 | case FMODE_WRITE: | |
785 | state->n_wronly--; | |
786 | break; | |
787 | case FMODE_READ|FMODE_WRITE: | |
788 | state->n_rdwr--; | |
789 | } | |
003707c7 | 790 | newstate = FMODE_READ|FMODE_WRITE; |
e7616923 | 791 | if (state->n_rdwr == 0) { |
003707c7 | 792 | if (state->n_rdonly == 0) { |
e7616923 | 793 | newstate &= ~FMODE_READ; |
003707c7 TM |
794 | call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags); |
795 | call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); | |
796 | } | |
797 | if (state->n_wronly == 0) { | |
e7616923 | 798 | newstate &= ~FMODE_WRITE; |
003707c7 TM |
799 | call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags); |
800 | call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); | |
801 | } | |
802 | if (newstate == 0) | |
803 | clear_bit(NFS_DELEGATED_STATE, &state->flags); | |
e7616923 | 804 | } |
003707c7 | 805 | nfs4_state_set_mode_locked(state, newstate); |
ec073428 | 806 | spin_unlock(&owner->so_lock); |
4cecb76f | 807 | |
003707c7 | 808 | if (!call_close) { |
b39e625b TM |
809 | nfs4_put_open_state(state); |
810 | nfs4_put_state_owner(owner); | |
1f7977c1 TM |
811 | } else |
812 | nfs4_do_close(state, gfp_mask, wait); | |
a49c3c77 TM |
813 | } |
814 | ||
643168c2 | 815 | void nfs4_close_state(struct nfs4_state *state, fmode_t fmode) |
a49c3c77 | 816 | { |
643168c2 | 817 | __nfs4_close(state, fmode, GFP_NOFS, 0); |
a49c3c77 TM |
818 | } |
819 | ||
643168c2 | 820 | void nfs4_close_sync(struct nfs4_state *state, fmode_t fmode) |
a49c3c77 | 821 | { |
643168c2 | 822 | __nfs4_close(state, fmode, GFP_KERNEL, 1); |
1da177e4 LT |
823 | } |
824 | ||
825 | /* | |
826 | * Search the state->lock_states for an existing lock_owner | |
827 | * that is compatible with current->files | |
828 | */ | |
829 | static struct nfs4_lock_state * | |
77041ed9 | 830 | __nfs4_find_lock_state(struct nfs4_state *state, fl_owner_t fl_owner, pid_t fl_pid, unsigned int type) |
1da177e4 LT |
831 | { |
832 | struct nfs4_lock_state *pos; | |
833 | list_for_each_entry(pos, &state->lock_states, ls_locks) { | |
77041ed9 | 834 | if (type != NFS4_ANY_LOCK_TYPE && pos->ls_owner.lo_type != type) |
1da177e4 | 835 | continue; |
77041ed9 TM |
836 | switch (pos->ls_owner.lo_type) { |
837 | case NFS4_POSIX_LOCK_TYPE: | |
838 | if (pos->ls_owner.lo_u.posix_owner != fl_owner) | |
839 | continue; | |
840 | break; | |
841 | case NFS4_FLOCK_LOCK_TYPE: | |
842 | if (pos->ls_owner.lo_u.flock_owner != fl_pid) | |
843 | continue; | |
844 | } | |
1da177e4 LT |
845 | atomic_inc(&pos->ls_count); |
846 | return pos; | |
847 | } | |
848 | return NULL; | |
849 | } | |
850 | ||
1da177e4 LT |
851 | /* |
852 | * Return a compatible lock_state. If no initialized lock_state structure | |
853 | * exists, return an uninitialized one. | |
854 | * | |
1da177e4 | 855 | */ |
77041ed9 | 856 | 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 |
857 | { |
858 | struct nfs4_lock_state *lsp; | |
24d292b8 | 859 | struct nfs_server *server = state->owner->so_server; |
1da177e4 | 860 | |
8535b2be | 861 | lsp = kzalloc(sizeof(*lsp), GFP_NOFS); |
1da177e4 LT |
862 | if (lsp == NULL) |
863 | return NULL; | |
7ba127ab | 864 | nfs4_init_seqid_counter(&lsp->ls_seqid); |
1da177e4 | 865 | atomic_set(&lsp->ls_count, 1); |
b64aec8d | 866 | lsp->ls_state = state; |
77041ed9 TM |
867 | lsp->ls_owner.lo_type = type; |
868 | switch (lsp->ls_owner.lo_type) { | |
869 | case NFS4_FLOCK_LOCK_TYPE: | |
870 | lsp->ls_owner.lo_u.flock_owner = fl_pid; | |
871 | break; | |
872 | case NFS4_POSIX_LOCK_TYPE: | |
873 | lsp->ls_owner.lo_u.posix_owner = fl_owner; | |
874 | break; | |
875 | default: | |
d2d7ce28 | 876 | goto out_free; |
77041ed9 | 877 | } |
48c22eb2 TM |
878 | lsp->ls_seqid.owner_id = ida_simple_get(&server->lockowner_id, 0, 0, GFP_NOFS); |
879 | if (lsp->ls_seqid.owner_id < 0) | |
d2d7ce28 | 880 | goto out_free; |
8d0a8a9d | 881 | INIT_LIST_HEAD(&lsp->ls_locks); |
1da177e4 | 882 | return lsp; |
d2d7ce28 TM |
883 | out_free: |
884 | kfree(lsp); | |
885 | return NULL; | |
1da177e4 LT |
886 | } |
887 | ||
5ae67c4f | 888 | void nfs4_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp) |
9f958ab8 | 889 | { |
48c22eb2 | 890 | ida_simple_remove(&server->lockowner_id, lsp->ls_seqid.owner_id); |
7ba127ab | 891 | nfs4_destroy_seqid_counter(&lsp->ls_seqid); |
9f958ab8 TM |
892 | kfree(lsp); |
893 | } | |
894 | ||
1da177e4 LT |
895 | /* |
896 | * Return a compatible lock_state. If no initialized lock_state structure | |
897 | * exists, return an uninitialized one. | |
898 | * | |
1da177e4 | 899 | */ |
77041ed9 | 900 | static struct nfs4_lock_state *nfs4_get_lock_state(struct nfs4_state *state, fl_owner_t owner, pid_t pid, unsigned int type) |
1da177e4 | 901 | { |
8d0a8a9d | 902 | struct nfs4_lock_state *lsp, *new = NULL; |
1da177e4 | 903 | |
8d0a8a9d TM |
904 | for(;;) { |
905 | spin_lock(&state->state_lock); | |
77041ed9 | 906 | lsp = __nfs4_find_lock_state(state, owner, pid, type); |
8d0a8a9d TM |
907 | if (lsp != NULL) |
908 | break; | |
909 | if (new != NULL) { | |
8d0a8a9d TM |
910 | list_add(&new->ls_locks, &state->lock_states); |
911 | set_bit(LK_STATE_IN_USE, &state->flags); | |
912 | lsp = new; | |
913 | new = NULL; | |
914 | break; | |
915 | } | |
916 | spin_unlock(&state->state_lock); | |
77041ed9 | 917 | new = nfs4_alloc_lock_state(state, owner, pid, type); |
8d0a8a9d TM |
918 | if (new == NULL) |
919 | return NULL; | |
920 | } | |
921 | spin_unlock(&state->state_lock); | |
9f958ab8 | 922 | if (new != NULL) |
5ae67c4f | 923 | nfs4_free_lock_state(state->owner->so_server, new); |
1da177e4 LT |
924 | return lsp; |
925 | } | |
926 | ||
927 | /* | |
8d0a8a9d TM |
928 | * Release reference to lock_state, and free it if we see that |
929 | * it is no longer in use | |
1da177e4 | 930 | */ |
faf5f49c | 931 | void nfs4_put_lock_state(struct nfs4_lock_state *lsp) |
1da177e4 | 932 | { |
8d0a8a9d | 933 | struct nfs4_state *state; |
1da177e4 | 934 | |
8d0a8a9d TM |
935 | if (lsp == NULL) |
936 | return; | |
937 | state = lsp->ls_state; | |
938 | if (!atomic_dec_and_lock(&lsp->ls_count, &state->state_lock)) | |
939 | return; | |
940 | list_del(&lsp->ls_locks); | |
941 | if (list_empty(&state->lock_states)) | |
942 | clear_bit(LK_STATE_IN_USE, &state->flags); | |
943 | spin_unlock(&state->state_lock); | |
795a88c9 | 944 | if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) { |
cf470c3e TM |
945 | if (nfs4_release_lockowner(lsp) == 0) |
946 | return; | |
947 | } | |
5ae67c4f | 948 | nfs4_free_lock_state(lsp->ls_state->owner->so_server, lsp); |
1da177e4 LT |
949 | } |
950 | ||
8d0a8a9d | 951 | static void nfs4_fl_copy_lock(struct file_lock *dst, struct file_lock *src) |
1da177e4 | 952 | { |
8d0a8a9d | 953 | struct nfs4_lock_state *lsp = src->fl_u.nfs4_fl.owner; |
1da177e4 | 954 | |
8d0a8a9d TM |
955 | dst->fl_u.nfs4_fl.owner = lsp; |
956 | atomic_inc(&lsp->ls_count); | |
957 | } | |
1da177e4 | 958 | |
8d0a8a9d | 959 | static void nfs4_fl_release_lock(struct file_lock *fl) |
1da177e4 | 960 | { |
8d0a8a9d | 961 | nfs4_put_lock_state(fl->fl_u.nfs4_fl.owner); |
1da177e4 LT |
962 | } |
963 | ||
6aed6285 | 964 | static const struct file_lock_operations nfs4_fl_lock_ops = { |
8d0a8a9d TM |
965 | .fl_copy_lock = nfs4_fl_copy_lock, |
966 | .fl_release_private = nfs4_fl_release_lock, | |
967 | }; | |
968 | ||
969 | int nfs4_set_lock_state(struct nfs4_state *state, struct file_lock *fl) | |
1da177e4 | 970 | { |
8d0a8a9d TM |
971 | struct nfs4_lock_state *lsp; |
972 | ||
973 | if (fl->fl_ops != NULL) | |
974 | return 0; | |
77041ed9 TM |
975 | if (fl->fl_flags & FL_POSIX) |
976 | lsp = nfs4_get_lock_state(state, fl->fl_owner, 0, NFS4_POSIX_LOCK_TYPE); | |
977 | else if (fl->fl_flags & FL_FLOCK) | |
17280175 TM |
978 | lsp = nfs4_get_lock_state(state, NULL, fl->fl_pid, |
979 | NFS4_FLOCK_LOCK_TYPE); | |
77041ed9 TM |
980 | else |
981 | return -EINVAL; | |
8d0a8a9d TM |
982 | if (lsp == NULL) |
983 | return -ENOMEM; | |
984 | fl->fl_u.nfs4_fl.owner = lsp; | |
985 | fl->fl_ops = &nfs4_fl_lock_ops; | |
986 | return 0; | |
1da177e4 LT |
987 | } |
988 | ||
4fc8796d | 989 | static bool nfs4_copy_lock_stateid(nfs4_stateid *dst, struct nfs4_state *state, |
2a369153 | 990 | const struct nfs_lockowner *lockowner) |
1da177e4 | 991 | { |
8d0a8a9d | 992 | struct nfs4_lock_state *lsp; |
2a369153 TM |
993 | fl_owner_t fl_owner; |
994 | pid_t fl_pid; | |
4fc8796d | 995 | bool ret = false; |
1da177e4 | 996 | |
2a369153 TM |
997 | |
998 | if (lockowner == NULL) | |
999 | goto out; | |
1000 | ||
8d0a8a9d | 1001 | if (test_bit(LK_STATE_IN_USE, &state->flags) == 0) |
4fc8796d | 1002 | goto out; |
1da177e4 | 1003 | |
2a369153 TM |
1004 | fl_owner = lockowner->l_owner; |
1005 | fl_pid = lockowner->l_pid; | |
8d0a8a9d | 1006 | spin_lock(&state->state_lock); |
77041ed9 | 1007 | lsp = __nfs4_find_lock_state(state, fl_owner, fl_pid, NFS4_ANY_LOCK_TYPE); |
795a88c9 | 1008 | if (lsp != NULL && test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0) { |
f597c537 | 1009 | nfs4_stateid_copy(dst, &lsp->ls_stateid); |
4fc8796d TM |
1010 | ret = true; |
1011 | } | |
8d0a8a9d | 1012 | spin_unlock(&state->state_lock); |
1da177e4 | 1013 | nfs4_put_lock_state(lsp); |
4fc8796d TM |
1014 | out: |
1015 | return ret; | |
1016 | } | |
1017 | ||
1018 | static void nfs4_copy_open_stateid(nfs4_stateid *dst, struct nfs4_state *state) | |
1019 | { | |
1020 | int seq; | |
1021 | ||
1022 | do { | |
1023 | seq = read_seqbegin(&state->seqlock); | |
1024 | nfs4_stateid_copy(dst, &state->stateid); | |
1025 | } while (read_seqretry(&state->seqlock, seq)); | |
1026 | } | |
1027 | ||
1028 | /* | |
1029 | * Byte-range lock aware utility to initialize the stateid of read/write | |
1030 | * requests. | |
1031 | */ | |
1032 | void nfs4_select_rw_stateid(nfs4_stateid *dst, struct nfs4_state *state, | |
2a369153 | 1033 | fmode_t fmode, const struct nfs_lockowner *lockowner) |
4fc8796d TM |
1034 | { |
1035 | if (nfs4_copy_delegation_stateid(dst, state->inode, fmode)) | |
1036 | return; | |
2a369153 | 1037 | if (nfs4_copy_lock_stateid(dst, state, lockowner)) |
4fc8796d TM |
1038 | return; |
1039 | nfs4_copy_open_stateid(dst, state); | |
1da177e4 LT |
1040 | } |
1041 | ||
8535b2be | 1042 | struct nfs_seqid *nfs_alloc_seqid(struct nfs_seqid_counter *counter, gfp_t gfp_mask) |
cee54fc9 | 1043 | { |
cee54fc9 TM |
1044 | struct nfs_seqid *new; |
1045 | ||
8535b2be | 1046 | new = kmalloc(sizeof(*new), gfp_mask); |
cee54fc9 TM |
1047 | if (new != NULL) { |
1048 | new->sequence = counter; | |
2f74c0a0 | 1049 | INIT_LIST_HEAD(&new->list); |
4601df20 | 1050 | new->task = NULL; |
cee54fc9 TM |
1051 | } |
1052 | return new; | |
1053 | } | |
1054 | ||
72211dbe | 1055 | void nfs_release_seqid(struct nfs_seqid *seqid) |
1da177e4 | 1056 | { |
4601df20 | 1057 | struct nfs_seqid_counter *sequence; |
cee54fc9 | 1058 | |
4601df20 TM |
1059 | if (list_empty(&seqid->list)) |
1060 | return; | |
1061 | sequence = seqid->sequence; | |
1062 | spin_lock(&sequence->lock); | |
1063 | list_del_init(&seqid->list); | |
1064 | if (!list_empty(&sequence->list)) { | |
1065 | struct nfs_seqid *next; | |
1066 | ||
1067 | next = list_first_entry(&sequence->list, | |
1068 | struct nfs_seqid, list); | |
1069 | rpc_wake_up_queued_task(&sequence->wait, next->task); | |
2f74c0a0 | 1070 | } |
4601df20 | 1071 | spin_unlock(&sequence->lock); |
72211dbe TM |
1072 | } |
1073 | ||
1074 | void nfs_free_seqid(struct nfs_seqid *seqid) | |
1075 | { | |
1076 | nfs_release_seqid(seqid); | |
cee54fc9 | 1077 | kfree(seqid); |
1da177e4 LT |
1078 | } |
1079 | ||
1080 | /* | |
cee54fc9 TM |
1081 | * Increment the seqid if the OPEN/OPEN_DOWNGRADE/CLOSE succeeded, or |
1082 | * failed with a seqid incrementing error - | |
1083 | * see comments nfs_fs.h:seqid_mutating_error() | |
1084 | */ | |
88d90939 | 1085 | static void nfs_increment_seqid(int status, struct nfs_seqid *seqid) |
cee54fc9 | 1086 | { |
7ba127ab | 1087 | BUG_ON(list_first_entry(&seqid->sequence->list, struct nfs_seqid, list) != seqid); |
cee54fc9 TM |
1088 | switch (status) { |
1089 | case 0: | |
1090 | break; | |
1091 | case -NFS4ERR_BAD_SEQID: | |
6f43ddcc TM |
1092 | if (seqid->sequence->flags & NFS_SEQID_CONFIRMED) |
1093 | return; | |
9a3ba432 | 1094 | pr_warn_ratelimited("NFS: v4 server returned a bad" |
497799e7 DM |
1095 | " sequence-id error on an" |
1096 | " unconfirmed sequence %p!\n", | |
6f43ddcc | 1097 | seqid->sequence); |
cee54fc9 TM |
1098 | case -NFS4ERR_STALE_CLIENTID: |
1099 | case -NFS4ERR_STALE_STATEID: | |
1100 | case -NFS4ERR_BAD_STATEID: | |
1101 | case -NFS4ERR_BADXDR: | |
1102 | case -NFS4ERR_RESOURCE: | |
1103 | case -NFS4ERR_NOFILEHANDLE: | |
1104 | /* Non-seqid mutating errors */ | |
1105 | return; | |
1106 | }; | |
1107 | /* | |
1108 | * Note: no locking needed as we are guaranteed to be first | |
1109 | * on the sequence list | |
1110 | */ | |
1111 | seqid->sequence->counter++; | |
1112 | } | |
1113 | ||
1114 | void nfs_increment_open_seqid(int status, struct nfs_seqid *seqid) | |
1115 | { | |
34dc1ad7 BH |
1116 | struct nfs4_state_owner *sp = container_of(seqid->sequence, |
1117 | struct nfs4_state_owner, so_seqid); | |
1118 | struct nfs_server *server = sp->so_server; | |
1119 | ||
1120 | if (status == -NFS4ERR_BAD_SEQID) | |
1da177e4 | 1121 | nfs4_drop_state_owner(sp); |
34dc1ad7 BH |
1122 | if (!nfs4_has_session(server->nfs_client)) |
1123 | nfs_increment_seqid(status, seqid); | |
cee54fc9 TM |
1124 | } |
1125 | ||
1126 | /* | |
cee54fc9 TM |
1127 | * Increment the seqid if the LOCK/LOCKU succeeded, or |
1128 | * failed with a seqid incrementing error - | |
1129 | * see comments nfs_fs.h:seqid_mutating_error() | |
1130 | */ | |
1131 | void nfs_increment_lock_seqid(int status, struct nfs_seqid *seqid) | |
1132 | { | |
88d90939 | 1133 | nfs_increment_seqid(status, seqid); |
cee54fc9 TM |
1134 | } |
1135 | ||
1136 | int nfs_wait_on_sequence(struct nfs_seqid *seqid, struct rpc_task *task) | |
1137 | { | |
7ba127ab | 1138 | struct nfs_seqid_counter *sequence = seqid->sequence; |
cee54fc9 TM |
1139 | int status = 0; |
1140 | ||
1141 | spin_lock(&sequence->lock); | |
4601df20 | 1142 | seqid->task = task; |
2f74c0a0 TM |
1143 | if (list_empty(&seqid->list)) |
1144 | list_add_tail(&seqid->list, &sequence->list); | |
1145 | if (list_first_entry(&sequence->list, struct nfs_seqid, list) == seqid) | |
1146 | goto unlock; | |
5d00837b | 1147 | rpc_sleep_on(&sequence->wait, task, NULL); |
2f74c0a0 TM |
1148 | status = -EAGAIN; |
1149 | unlock: | |
cee54fc9 TM |
1150 | spin_unlock(&sequence->lock); |
1151 | return status; | |
1da177e4 LT |
1152 | } |
1153 | ||
e005e804 | 1154 | static int nfs4_run_state_manager(void *); |
1da177e4 | 1155 | |
e005e804 | 1156 | static void nfs4_clear_state_manager_bit(struct nfs_client *clp) |
433fbe4c TM |
1157 | { |
1158 | smp_mb__before_clear_bit(); | |
e005e804 | 1159 | clear_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state); |
433fbe4c | 1160 | smp_mb__after_clear_bit(); |
e005e804 | 1161 | wake_up_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING); |
433fbe4c TM |
1162 | rpc_wake_up(&clp->cl_rpcwaitq); |
1163 | } | |
1164 | ||
1da177e4 | 1165 | /* |
e005e804 | 1166 | * Schedule the nfs_client asynchronous state management routine |
1da177e4 | 1167 | */ |
b0d3ded1 | 1168 | void nfs4_schedule_state_manager(struct nfs_client *clp) |
1da177e4 | 1169 | { |
5043e900 | 1170 | struct task_struct *task; |
2446ab60 | 1171 | char buf[INET6_ADDRSTRLEN + sizeof("-manager") + 1]; |
1da177e4 | 1172 | |
e005e804 TM |
1173 | if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) != 0) |
1174 | return; | |
5043e900 TM |
1175 | __module_get(THIS_MODULE); |
1176 | atomic_inc(&clp->cl_count); | |
2446ab60 TM |
1177 | |
1178 | /* The rcu_read_lock() is not strictly necessary, as the state | |
1179 | * manager is the only thread that ever changes the rpc_xprt | |
1180 | * after it's initialized. At this point, we're single threaded. */ | |
1181 | rcu_read_lock(); | |
1182 | snprintf(buf, sizeof(buf), "%s-manager", | |
1183 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)); | |
1184 | rcu_read_unlock(); | |
1185 | task = kthread_run(nfs4_run_state_manager, clp, buf); | |
1186 | if (IS_ERR(task)) { | |
1187 | printk(KERN_ERR "%s: kthread_run: %ld\n", | |
1188 | __func__, PTR_ERR(task)); | |
1189 | nfs4_clear_state_manager_bit(clp); | |
1190 | nfs_put_client(clp); | |
1191 | module_put(THIS_MODULE); | |
1192 | } | |
1da177e4 LT |
1193 | } |
1194 | ||
1195 | /* | |
0400a6b0 | 1196 | * Schedule a lease recovery attempt |
1da177e4 | 1197 | */ |
0400a6b0 | 1198 | void nfs4_schedule_lease_recovery(struct nfs_client *clp) |
1da177e4 LT |
1199 | { |
1200 | if (!clp) | |
1201 | return; | |
e598d843 TM |
1202 | if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
1203 | set_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); | |
cc0a9843 TM |
1204 | dprintk("%s: scheduling lease recovery for server %s\n", __func__, |
1205 | clp->cl_hostname); | |
e005e804 | 1206 | nfs4_schedule_state_manager(clp); |
1da177e4 | 1207 | } |
9cb81968 | 1208 | EXPORT_SYMBOL_GPL(nfs4_schedule_lease_recovery); |
1da177e4 | 1209 | |
ad1e3968 TM |
1210 | /* |
1211 | * nfs40_handle_cb_pathdown - return all delegations after NFS4ERR_CB_PATH_DOWN | |
1212 | * @clp: client to process | |
1213 | * | |
1214 | * Set the NFS4CLNT_LEASE_EXPIRED state in order to force a | |
1215 | * resend of the SETCLIENTID and hence re-establish the | |
1216 | * callback channel. Then return all existing delegations. | |
1217 | */ | |
1218 | static void nfs40_handle_cb_pathdown(struct nfs_client *clp) | |
1219 | { | |
1220 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1221 | nfs_expire_all_delegations(clp); | |
cc0a9843 TM |
1222 | dprintk("%s: handling CB_PATHDOWN recovery for server %s\n", __func__, |
1223 | clp->cl_hostname); | |
ad1e3968 TM |
1224 | } |
1225 | ||
042b60be TM |
1226 | void nfs4_schedule_path_down_recovery(struct nfs_client *clp) |
1227 | { | |
ad1e3968 | 1228 | nfs40_handle_cb_pathdown(clp); |
042b60be TM |
1229 | nfs4_schedule_state_manager(clp); |
1230 | } | |
1231 | ||
f9feab1e | 1232 | static int nfs4_state_mark_reclaim_reboot(struct nfs_client *clp, struct nfs4_state *state) |
b79a4a1b TM |
1233 | { |
1234 | ||
1235 | set_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); | |
1236 | /* Don't recover state that expired before the reboot */ | |
1237 | if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) { | |
1238 | clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); | |
1239 | return 0; | |
1240 | } | |
7eff03ae | 1241 | set_bit(NFS_OWNER_RECLAIM_REBOOT, &state->owner->so_flags); |
b79a4a1b TM |
1242 | set_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state); |
1243 | return 1; | |
1244 | } | |
1245 | ||
f9feab1e | 1246 | static int nfs4_state_mark_reclaim_nograce(struct nfs_client *clp, struct nfs4_state *state) |
b79a4a1b TM |
1247 | { |
1248 | set_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags); | |
1249 | clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); | |
7eff03ae | 1250 | set_bit(NFS_OWNER_RECLAIM_NOGRACE, &state->owner->so_flags); |
b79a4a1b TM |
1251 | set_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state); |
1252 | return 1; | |
1253 | } | |
1254 | ||
0400a6b0 TM |
1255 | void nfs4_schedule_stateid_recovery(const struct nfs_server *server, struct nfs4_state *state) |
1256 | { | |
1257 | struct nfs_client *clp = server->nfs_client; | |
1258 | ||
1259 | nfs4_state_mark_reclaim_nograce(clp, state); | |
cc0a9843 TM |
1260 | dprintk("%s: scheduling stateid recovery for server %s\n", __func__, |
1261 | clp->cl_hostname); | |
0400a6b0 TM |
1262 | nfs4_schedule_state_manager(clp); |
1263 | } | |
9cb81968 | 1264 | EXPORT_SYMBOL_GPL(nfs4_schedule_stateid_recovery); |
0400a6b0 | 1265 | |
a1d0b5ee TM |
1266 | void nfs_inode_find_state_and_recover(struct inode *inode, |
1267 | const nfs4_stateid *stateid) | |
1268 | { | |
1269 | struct nfs_client *clp = NFS_SERVER(inode)->nfs_client; | |
1270 | struct nfs_inode *nfsi = NFS_I(inode); | |
1271 | struct nfs_open_context *ctx; | |
1272 | struct nfs4_state *state; | |
1273 | bool found = false; | |
1274 | ||
1275 | spin_lock(&inode->i_lock); | |
1276 | list_for_each_entry(ctx, &nfsi->open_files, list) { | |
1277 | state = ctx->state; | |
1278 | if (state == NULL) | |
1279 | continue; | |
1280 | if (!test_bit(NFS_DELEGATED_STATE, &state->flags)) | |
1281 | continue; | |
f597c537 | 1282 | if (!nfs4_stateid_match(&state->stateid, stateid)) |
a1d0b5ee TM |
1283 | continue; |
1284 | nfs4_state_mark_reclaim_nograce(clp, state); | |
1285 | found = true; | |
1286 | } | |
1287 | spin_unlock(&inode->i_lock); | |
1288 | if (found) | |
1289 | nfs4_schedule_state_manager(clp); | |
1290 | } | |
1291 | ||
1292 | ||
02860014 | 1293 | static int nfs4_reclaim_locks(struct nfs4_state *state, const struct nfs4_state_recovery_ops *ops) |
1da177e4 LT |
1294 | { |
1295 | struct inode *inode = state->inode; | |
19e03c57 | 1296 | struct nfs_inode *nfsi = NFS_I(inode); |
1da177e4 LT |
1297 | struct file_lock *fl; |
1298 | int status = 0; | |
1299 | ||
3f09df70 TM |
1300 | if (inode->i_flock == NULL) |
1301 | return 0; | |
1302 | ||
1303 | /* Guard against delegation returns and new lock/unlock calls */ | |
19e03c57 | 1304 | down_write(&nfsi->rwsem); |
3f09df70 | 1305 | /* Protect inode->i_flock using the BKL */ |
b89f4321 | 1306 | lock_flocks(); |
90dc7d27 | 1307 | for (fl = inode->i_flock; fl != NULL; fl = fl->fl_next) { |
43b2a33a | 1308 | if (!(fl->fl_flags & (FL_POSIX|FL_FLOCK))) |
1da177e4 | 1309 | continue; |
cd3758e3 | 1310 | if (nfs_file_open_context(fl->fl_file)->state != state) |
1da177e4 | 1311 | continue; |
b89f4321 | 1312 | unlock_flocks(); |
1da177e4 | 1313 | status = ops->recover_lock(state, fl); |
1da177e4 | 1314 | switch (status) { |
965b5d67 TM |
1315 | case 0: |
1316 | break; | |
1317 | case -ESTALE: | |
1318 | case -NFS4ERR_ADMIN_REVOKED: | |
1319 | case -NFS4ERR_STALE_STATEID: | |
1320 | case -NFS4ERR_BAD_STATEID: | |
1321 | case -NFS4ERR_EXPIRED: | |
1322 | case -NFS4ERR_NO_GRACE: | |
1323 | case -NFS4ERR_STALE_CLIENTID: | |
9c4c761a TM |
1324 | case -NFS4ERR_BADSESSION: |
1325 | case -NFS4ERR_BADSLOT: | |
1326 | case -NFS4ERR_BAD_HIGH_SLOT: | |
1327 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
965b5d67 | 1328 | goto out; |
1da177e4 | 1329 | default: |
a030889a WAA |
1330 | printk(KERN_ERR "NFS: %s: unhandled error %d. " |
1331 | "Zeroing state\n", __func__, status); | |
965b5d67 TM |
1332 | case -ENOMEM: |
1333 | case -NFS4ERR_DENIED: | |
1da177e4 LT |
1334 | case -NFS4ERR_RECLAIM_BAD: |
1335 | case -NFS4ERR_RECLAIM_CONFLICT: | |
43b2a33a | 1336 | /* kill_proc(fl->fl_pid, SIGLOST, 1); */ |
965b5d67 | 1337 | status = 0; |
1da177e4 | 1338 | } |
b89f4321 | 1339 | lock_flocks(); |
1da177e4 | 1340 | } |
b89f4321 | 1341 | unlock_flocks(); |
965b5d67 | 1342 | out: |
19e03c57 | 1343 | up_write(&nfsi->rwsem); |
1da177e4 LT |
1344 | return status; |
1345 | } | |
1346 | ||
02860014 | 1347 | static int nfs4_reclaim_open_state(struct nfs4_state_owner *sp, const struct nfs4_state_recovery_ops *ops) |
1da177e4 LT |
1348 | { |
1349 | struct nfs4_state *state; | |
1350 | struct nfs4_lock_state *lock; | |
1351 | int status = 0; | |
1352 | ||
1353 | /* Note: we rely on the sp->so_states list being ordered | |
1354 | * so that we always reclaim open(O_RDWR) and/or open(O_WRITE) | |
1355 | * states first. | |
1356 | * This is needed to ensure that the server won't give us any | |
1357 | * read delegations that we have to return if, say, we are | |
1358 | * recovering after a network partition or a reboot from a | |
1359 | * server that doesn't support a grace period. | |
1360 | */ | |
fe1d8195 TM |
1361 | restart: |
1362 | spin_lock(&sp->so_lock); | |
1da177e4 | 1363 | list_for_each_entry(state, &sp->so_states, open_states) { |
b79a4a1b TM |
1364 | if (!test_and_clear_bit(ops->state_flag_bit, &state->flags)) |
1365 | continue; | |
1da177e4 LT |
1366 | if (state->state == 0) |
1367 | continue; | |
fe1d8195 TM |
1368 | atomic_inc(&state->count); |
1369 | spin_unlock(&sp->so_lock); | |
1da177e4 | 1370 | status = ops->recover_open(sp, state); |
1da177e4 | 1371 | if (status >= 0) { |
02860014 TM |
1372 | status = nfs4_reclaim_locks(state, ops); |
1373 | if (status >= 0) { | |
4b44b40e | 1374 | spin_lock(&state->state_lock); |
02860014 | 1375 | list_for_each_entry(lock, &state->lock_states, ls_locks) { |
795a88c9 | 1376 | if (!test_bit(NFS_LOCK_INITIALIZED, &lock->ls_flags)) |
96dcadc2 WD |
1377 | pr_warn_ratelimited("NFS: " |
1378 | "%s: Lock reclaim " | |
a030889a | 1379 | "failed!\n", __func__); |
02860014 | 1380 | } |
4b44b40e | 1381 | spin_unlock(&state->state_lock); |
fe1d8195 TM |
1382 | nfs4_put_open_state(state); |
1383 | goto restart; | |
1da177e4 | 1384 | } |
1da177e4 LT |
1385 | } |
1386 | switch (status) { | |
1387 | default: | |
a030889a WAA |
1388 | printk(KERN_ERR "NFS: %s: unhandled error %d. " |
1389 | "Zeroing state\n", __func__, status); | |
1da177e4 | 1390 | case -ENOENT: |
965b5d67 | 1391 | case -ENOMEM: |
b79a4a1b | 1392 | case -ESTALE: |
1da177e4 LT |
1393 | /* |
1394 | * Open state on this file cannot be recovered | |
1395 | * All we can do is revert to using the zero stateid. | |
1396 | */ | |
2d2f24ad TM |
1397 | memset(&state->stateid, 0, |
1398 | sizeof(state->stateid)); | |
1da177e4 LT |
1399 | /* Mark the file as being 'closed' */ |
1400 | state->state = 0; | |
1401 | break; | |
168667c4 TM |
1402 | case -EKEYEXPIRED: |
1403 | /* | |
1404 | * User RPCSEC_GSS context has expired. | |
1405 | * We cannot recover this stateid now, so | |
1406 | * skip it and allow recovery thread to | |
1407 | * proceed. | |
1408 | */ | |
1409 | break; | |
965b5d67 TM |
1410 | case -NFS4ERR_ADMIN_REVOKED: |
1411 | case -NFS4ERR_STALE_STATEID: | |
1412 | case -NFS4ERR_BAD_STATEID: | |
b79a4a1b TM |
1413 | case -NFS4ERR_RECLAIM_BAD: |
1414 | case -NFS4ERR_RECLAIM_CONFLICT: | |
1f0e890d | 1415 | nfs4_state_mark_reclaim_nograce(sp->so_server->nfs_client, state); |
b79a4a1b | 1416 | break; |
1da177e4 LT |
1417 | case -NFS4ERR_EXPIRED: |
1418 | case -NFS4ERR_NO_GRACE: | |
1f0e890d | 1419 | nfs4_state_mark_reclaim_nograce(sp->so_server->nfs_client, state); |
1da177e4 | 1420 | case -NFS4ERR_STALE_CLIENTID: |
9c4c761a TM |
1421 | case -NFS4ERR_BADSESSION: |
1422 | case -NFS4ERR_BADSLOT: | |
1423 | case -NFS4ERR_BAD_HIGH_SLOT: | |
1424 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
1da177e4 LT |
1425 | goto out_err; |
1426 | } | |
fe1d8195 TM |
1427 | nfs4_put_open_state(state); |
1428 | goto restart; | |
1da177e4 | 1429 | } |
fe1d8195 | 1430 | spin_unlock(&sp->so_lock); |
1da177e4 LT |
1431 | return 0; |
1432 | out_err: | |
fe1d8195 | 1433 | nfs4_put_open_state(state); |
1da177e4 LT |
1434 | return status; |
1435 | } | |
1436 | ||
b79a4a1b TM |
1437 | static void nfs4_clear_open_state(struct nfs4_state *state) |
1438 | { | |
1439 | struct nfs4_lock_state *lock; | |
1440 | ||
1441 | clear_bit(NFS_DELEGATED_STATE, &state->flags); | |
1442 | clear_bit(NFS_O_RDONLY_STATE, &state->flags); | |
1443 | clear_bit(NFS_O_WRONLY_STATE, &state->flags); | |
1444 | clear_bit(NFS_O_RDWR_STATE, &state->flags); | |
4b44b40e | 1445 | spin_lock(&state->state_lock); |
b79a4a1b | 1446 | list_for_each_entry(lock, &state->lock_states, ls_locks) { |
b79a4a1b | 1447 | lock->ls_seqid.flags = 0; |
795a88c9 | 1448 | clear_bit(NFS_LOCK_INITIALIZED, &lock->ls_flags); |
b79a4a1b | 1449 | } |
4b44b40e | 1450 | spin_unlock(&state->state_lock); |
b79a4a1b TM |
1451 | } |
1452 | ||
24d292b8 CL |
1453 | static void nfs4_reset_seqids(struct nfs_server *server, |
1454 | int (*mark_reclaim)(struct nfs_client *clp, struct nfs4_state *state)) | |
cee54fc9 | 1455 | { |
24d292b8 | 1456 | struct nfs_client *clp = server->nfs_client; |
cee54fc9 | 1457 | struct nfs4_state_owner *sp; |
9f958ab8 | 1458 | struct rb_node *pos; |
cee54fc9 | 1459 | struct nfs4_state *state; |
cee54fc9 | 1460 | |
24d292b8 CL |
1461 | spin_lock(&clp->cl_lock); |
1462 | for (pos = rb_first(&server->state_owners); | |
1463 | pos != NULL; | |
1464 | pos = rb_next(pos)) { | |
1465 | sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); | |
cee54fc9 | 1466 | sp->so_seqid.flags = 0; |
ec073428 | 1467 | spin_lock(&sp->so_lock); |
cee54fc9 | 1468 | list_for_each_entry(state, &sp->so_states, open_states) { |
b79a4a1b TM |
1469 | if (mark_reclaim(clp, state)) |
1470 | nfs4_clear_open_state(state); | |
cee54fc9 | 1471 | } |
ec073428 | 1472 | spin_unlock(&sp->so_lock); |
cee54fc9 | 1473 | } |
24d292b8 CL |
1474 | spin_unlock(&clp->cl_lock); |
1475 | } | |
1476 | ||
1477 | static void nfs4_state_mark_reclaim_helper(struct nfs_client *clp, | |
1478 | int (*mark_reclaim)(struct nfs_client *clp, struct nfs4_state *state)) | |
1479 | { | |
1480 | struct nfs_server *server; | |
1481 | ||
1482 | rcu_read_lock(); | |
1483 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) | |
1484 | nfs4_reset_seqids(server, mark_reclaim); | |
1485 | rcu_read_unlock(); | |
cee54fc9 TM |
1486 | } |
1487 | ||
b79a4a1b TM |
1488 | static void nfs4_state_start_reclaim_reboot(struct nfs_client *clp) |
1489 | { | |
1490 | /* Mark all delegations for reclaim */ | |
1491 | nfs_delegation_mark_reclaim(clp); | |
1492 | nfs4_state_mark_reclaim_helper(clp, nfs4_state_mark_reclaim_reboot); | |
1493 | } | |
1494 | ||
fce5c838 RL |
1495 | static void nfs4_reclaim_complete(struct nfs_client *clp, |
1496 | const struct nfs4_state_recovery_ops *ops) | |
1497 | { | |
1498 | /* Notify the server we're done reclaiming our state */ | |
1499 | if (ops->reclaim_complete) | |
1500 | (void)ops->reclaim_complete(clp); | |
1501 | } | |
1502 | ||
24d292b8 | 1503 | static void nfs4_clear_reclaim_server(struct nfs_server *server) |
b79a4a1b | 1504 | { |
24d292b8 | 1505 | struct nfs_client *clp = server->nfs_client; |
b79a4a1b TM |
1506 | struct nfs4_state_owner *sp; |
1507 | struct rb_node *pos; | |
1508 | struct nfs4_state *state; | |
1509 | ||
24d292b8 CL |
1510 | spin_lock(&clp->cl_lock); |
1511 | for (pos = rb_first(&server->state_owners); | |
1512 | pos != NULL; | |
1513 | pos = rb_next(pos)) { | |
1514 | sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); | |
b79a4a1b TM |
1515 | spin_lock(&sp->so_lock); |
1516 | list_for_each_entry(state, &sp->so_states, open_states) { | |
24d292b8 CL |
1517 | if (!test_and_clear_bit(NFS_STATE_RECLAIM_REBOOT, |
1518 | &state->flags)) | |
b79a4a1b TM |
1519 | continue; |
1520 | nfs4_state_mark_reclaim_nograce(clp, state); | |
1521 | } | |
1522 | spin_unlock(&sp->so_lock); | |
1523 | } | |
24d292b8 CL |
1524 | spin_unlock(&clp->cl_lock); |
1525 | } | |
1526 | ||
1527 | static int nfs4_state_clear_reclaim_reboot(struct nfs_client *clp) | |
1528 | { | |
1529 | struct nfs_server *server; | |
1530 | ||
1531 | if (!test_and_clear_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) | |
1532 | return 0; | |
1533 | ||
1534 | rcu_read_lock(); | |
1535 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) | |
1536 | nfs4_clear_reclaim_server(server); | |
1537 | rcu_read_unlock(); | |
b79a4a1b TM |
1538 | |
1539 | nfs_delegation_reap_unclaimed(clp); | |
6eaa6149 TM |
1540 | return 1; |
1541 | } | |
1542 | ||
1543 | static void nfs4_state_end_reclaim_reboot(struct nfs_client *clp) | |
1544 | { | |
1545 | if (!nfs4_state_clear_reclaim_reboot(clp)) | |
1546 | return; | |
1547 | nfs4_reclaim_complete(clp, clp->cl_mvops->reboot_recovery_ops); | |
b79a4a1b TM |
1548 | } |
1549 | ||
1550 | static void nfs_delegation_clear_all(struct nfs_client *clp) | |
1551 | { | |
1552 | nfs_delegation_mark_reclaim(clp); | |
1553 | nfs_delegation_reap_unclaimed(clp); | |
1554 | } | |
1555 | ||
1556 | static void nfs4_state_start_reclaim_nograce(struct nfs_client *clp) | |
1557 | { | |
1558 | nfs_delegation_clear_all(clp); | |
1559 | nfs4_state_mark_reclaim_helper(clp, nfs4_state_mark_reclaim_nograce); | |
1560 | } | |
1561 | ||
168667c4 TM |
1562 | static void nfs4_warn_keyexpired(const char *s) |
1563 | { | |
1564 | printk_ratelimited(KERN_WARNING "Error: state manager" | |
1565 | " encountered RPCSEC_GSS session" | |
1566 | " expired against NFSv4 server %s.\n", | |
1567 | s); | |
1568 | } | |
1569 | ||
4f7cdf18 | 1570 | static int nfs4_recovery_handle_error(struct nfs_client *clp, int error) |
e598d843 TM |
1571 | { |
1572 | switch (error) { | |
4f38e4aa TM |
1573 | case 0: |
1574 | break; | |
e598d843 | 1575 | case -NFS4ERR_CB_PATH_DOWN: |
ad1e3968 | 1576 | nfs40_handle_cb_pathdown(clp); |
4f38e4aa | 1577 | break; |
c8b7ae3d TM |
1578 | case -NFS4ERR_NO_GRACE: |
1579 | nfs4_state_end_reclaim_reboot(clp); | |
4f38e4aa | 1580 | break; |
e598d843 TM |
1581 | case -NFS4ERR_STALE_CLIENTID: |
1582 | case -NFS4ERR_LEASE_MOVED: | |
1583 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
6eaa6149 | 1584 | nfs4_state_clear_reclaim_reboot(clp); |
e598d843 TM |
1585 | nfs4_state_start_reclaim_reboot(clp); |
1586 | break; | |
1587 | case -NFS4ERR_EXPIRED: | |
1588 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1589 | nfs4_state_start_reclaim_nograce(clp); | |
8ba9bf8e | 1590 | break; |
c3fad1b1 AA |
1591 | case -NFS4ERR_BADSESSION: |
1592 | case -NFS4ERR_BADSLOT: | |
1593 | case -NFS4ERR_BAD_HIGH_SLOT: | |
1594 | case -NFS4ERR_DEADSESSION: | |
c3fad1b1 AA |
1595 | case -NFS4ERR_SEQ_FALSE_RETRY: |
1596 | case -NFS4ERR_SEQ_MISORDERED: | |
6df08189 | 1597 | set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); |
0b9e2d41 | 1598 | /* Zero session reset errors */ |
4f38e4aa | 1599 | break; |
7c5d7256 TM |
1600 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: |
1601 | set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); | |
1602 | break; | |
168667c4 TM |
1603 | case -EKEYEXPIRED: |
1604 | /* Nothing we can do */ | |
1605 | nfs4_warn_keyexpired(clp->cl_hostname); | |
4f38e4aa TM |
1606 | break; |
1607 | default: | |
cc0a9843 TM |
1608 | dprintk("%s: failed to handle error %d for server %s\n", |
1609 | __func__, error, clp->cl_hostname); | |
4f38e4aa | 1610 | return error; |
e598d843 | 1611 | } |
cc0a9843 TM |
1612 | dprintk("%s: handled error %d for server %s\n", __func__, error, |
1613 | clp->cl_hostname); | |
4f38e4aa | 1614 | return 0; |
e598d843 TM |
1615 | } |
1616 | ||
02860014 | 1617 | static int nfs4_do_reclaim(struct nfs_client *clp, const struct nfs4_state_recovery_ops *ops) |
1da177e4 | 1618 | { |
24d292b8 CL |
1619 | struct nfs4_state_owner *sp; |
1620 | struct nfs_server *server; | |
9f958ab8 | 1621 | struct rb_node *pos; |
1da177e4 LT |
1622 | int status = 0; |
1623 | ||
7eff03ae | 1624 | restart: |
24d292b8 CL |
1625 | rcu_read_lock(); |
1626 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { | |
0aaaf5c4 | 1627 | nfs4_purge_state_owners(server); |
24d292b8 CL |
1628 | spin_lock(&clp->cl_lock); |
1629 | for (pos = rb_first(&server->state_owners); | |
1630 | pos != NULL; | |
1631 | pos = rb_next(pos)) { | |
1632 | sp = rb_entry(pos, | |
1633 | struct nfs4_state_owner, so_server_node); | |
1634 | if (!test_and_clear_bit(ops->owner_flag_bit, | |
1635 | &sp->so_flags)) | |
1636 | continue; | |
1637 | atomic_inc(&sp->so_count); | |
1638 | spin_unlock(&clp->cl_lock); | |
1639 | rcu_read_unlock(); | |
1640 | ||
1641 | status = nfs4_reclaim_open_state(sp, ops); | |
1642 | if (status < 0) { | |
1643 | set_bit(ops->owner_flag_bit, &sp->so_flags); | |
1644 | nfs4_put_state_owner(sp); | |
1645 | return nfs4_recovery_handle_error(clp, status); | |
1646 | } | |
1647 | ||
7eff03ae | 1648 | nfs4_put_state_owner(sp); |
24d292b8 | 1649 | goto restart; |
7eff03ae | 1650 | } |
24d292b8 | 1651 | spin_unlock(&clp->cl_lock); |
02860014 | 1652 | } |
24d292b8 | 1653 | rcu_read_unlock(); |
02860014 TM |
1654 | return status; |
1655 | } | |
1656 | ||
1657 | static int nfs4_check_lease(struct nfs_client *clp) | |
1658 | { | |
1659 | struct rpc_cred *cred; | |
c48f4f35 TM |
1660 | const struct nfs4_state_maintenance_ops *ops = |
1661 | clp->cl_mvops->state_renewal_ops; | |
4f38e4aa | 1662 | int status; |
1da177e4 | 1663 | |
0f605b56 TM |
1664 | /* Is the client already known to have an expired lease? */ |
1665 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) | |
1666 | return 0; | |
a7b72103 AA |
1667 | spin_lock(&clp->cl_lock); |
1668 | cred = ops->get_state_renewal_cred_locked(clp); | |
1669 | spin_unlock(&clp->cl_lock); | |
0f605b56 TM |
1670 | if (cred == NULL) { |
1671 | cred = nfs4_get_setclientid_cred(clp); | |
4f38e4aa | 1672 | status = -ENOKEY; |
0f605b56 TM |
1673 | if (cred == NULL) |
1674 | goto out; | |
286d7d6a | 1675 | } |
8e69514f | 1676 | status = ops->renew_lease(clp, cred); |
0f605b56 TM |
1677 | put_rpccred(cred); |
1678 | out: | |
4f7cdf18 | 1679 | return nfs4_recovery_handle_error(clp, status); |
02860014 TM |
1680 | } |
1681 | ||
2a6ee6aa TM |
1682 | /* Set NFS4CLNT_LEASE_EXPIRED for all v4.0 errors and for recoverable errors |
1683 | * on EXCHANGE_ID for v4.1 | |
1684 | */ | |
1685 | static int nfs4_handle_reclaim_lease_error(struct nfs_client *clp, int status) | |
1686 | { | |
1687 | switch (status) { | |
89a21736 TM |
1688 | case -NFS4ERR_SEQ_MISORDERED: |
1689 | if (test_and_set_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) | |
1690 | return -ESERVERFAULT; | |
1691 | /* Lease confirmation error: retry after purging the lease */ | |
1692 | ssleep(1); | |
2a6ee6aa TM |
1693 | case -NFS4ERR_STALE_CLIENTID: |
1694 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); | |
1695 | break; | |
de734831 CL |
1696 | case -NFS4ERR_CLID_INUSE: |
1697 | pr_err("NFS: Server %s reports our clientid is in use\n", | |
1698 | clp->cl_hostname); | |
1699 | nfs_mark_client_ready(clp, -EPERM); | |
1700 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); | |
1701 | return -EPERM; | |
2a6ee6aa TM |
1702 | case -EACCES: |
1703 | if (clp->cl_machine_cred == NULL) | |
1704 | return -EACCES; | |
1705 | /* Handle case where the user hasn't set up machine creds */ | |
1706 | nfs4_clear_machine_cred(clp); | |
1707 | case -NFS4ERR_DELAY: | |
1708 | case -ETIMEDOUT: | |
1709 | case -EAGAIN: | |
1710 | ssleep(1); | |
1711 | break; | |
1712 | ||
1713 | case -NFS4ERR_MINOR_VERS_MISMATCH: | |
1714 | if (clp->cl_cons_state == NFS_CS_SESSION_INITING) | |
1715 | nfs_mark_client_ready(clp, -EPROTONOSUPPORT); | |
cc0a9843 TM |
1716 | dprintk("%s: exit with error %d for server %s\n", |
1717 | __func__, -EPROTONOSUPPORT, clp->cl_hostname); | |
2a6ee6aa TM |
1718 | return -EPROTONOSUPPORT; |
1719 | case -EKEYEXPIRED: | |
1720 | nfs4_warn_keyexpired(clp->cl_hostname); | |
1721 | case -NFS4ERR_NOT_SAME: /* FixMe: implement recovery | |
1722 | * in nfs4_exchange_id */ | |
1723 | default: | |
cc0a9843 TM |
1724 | dprintk("%s: exit with error %d for server %s\n", __func__, |
1725 | status, clp->cl_hostname); | |
2a6ee6aa TM |
1726 | return status; |
1727 | } | |
1728 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
cc0a9843 TM |
1729 | dprintk("%s: handled error %d for server %s\n", __func__, status, |
1730 | clp->cl_hostname); | |
2a6ee6aa TM |
1731 | return 0; |
1732 | } | |
1733 | ||
b42353ff | 1734 | static int nfs4_establish_lease(struct nfs_client *clp) |
02860014 TM |
1735 | { |
1736 | struct rpc_cred *cred; | |
c48f4f35 TM |
1737 | const struct nfs4_state_recovery_ops *ops = |
1738 | clp->cl_mvops->reboot_recovery_ops; | |
2a6ee6aa | 1739 | int status; |
02860014 | 1740 | |
90a16617 | 1741 | cred = ops->get_clid_cred(clp); |
2a6ee6aa TM |
1742 | if (cred == NULL) |
1743 | return -ENOENT; | |
1744 | status = ops->establish_clid(clp, cred); | |
1745 | put_rpccred(cred); | |
1746 | if (status != 0) | |
b42353ff TM |
1747 | return status; |
1748 | pnfs_destroy_all_layouts(clp); | |
1749 | return 0; | |
1750 | } | |
1751 | ||
6bbb4ae8 CL |
1752 | /* |
1753 | * Returns zero or a negative errno. NFS4ERR values are converted | |
1754 | * to local errno values. | |
1755 | */ | |
b42353ff TM |
1756 | static int nfs4_reclaim_lease(struct nfs_client *clp) |
1757 | { | |
1758 | int status; | |
1759 | ||
1760 | status = nfs4_establish_lease(clp); | |
1761 | if (status < 0) | |
1762 | return nfs4_handle_reclaim_lease_error(clp, status); | |
1763 | if (test_and_clear_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state)) | |
1764 | nfs4_state_start_reclaim_nograce(clp); | |
1765 | if (!test_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) | |
1766 | set_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state); | |
1767 | clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); | |
1768 | clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1769 | return 0; | |
1770 | } | |
1771 | ||
1772 | static int nfs4_purge_lease(struct nfs_client *clp) | |
1773 | { | |
1774 | int status; | |
1775 | ||
1776 | status = nfs4_establish_lease(clp); | |
1777 | if (status < 0) | |
2a6ee6aa | 1778 | return nfs4_handle_reclaim_lease_error(clp, status); |
b42353ff TM |
1779 | clear_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state); |
1780 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1781 | nfs4_state_start_reclaim_nograce(clp); | |
2a6ee6aa | 1782 | return 0; |
02860014 TM |
1783 | } |
1784 | ||
05f4c350 CL |
1785 | /** |
1786 | * nfs4_discover_server_trunking - Detect server IP address trunking | |
1787 | * | |
1788 | * @clp: nfs_client under test | |
1789 | * @result: OUT: found nfs_client, or clp | |
1790 | * | |
1791 | * Returns zero or a negative errno. If zero is returned, | |
1792 | * an nfs_client pointer is planted in "result". | |
1793 | * | |
1794 | * Note: since we are invoked in process context, and | |
1795 | * not from inside the state manager, we cannot use | |
1796 | * nfs4_handle_reclaim_lease_error(). | |
1797 | */ | |
1798 | int nfs4_discover_server_trunking(struct nfs_client *clp, | |
1799 | struct nfs_client **result) | |
1800 | { | |
1801 | const struct nfs4_state_recovery_ops *ops = | |
1802 | clp->cl_mvops->reboot_recovery_ops; | |
1803 | rpc_authflavor_t *flavors, flav, save; | |
1804 | struct rpc_clnt *clnt; | |
1805 | struct rpc_cred *cred; | |
1806 | int i, len, status; | |
1807 | ||
1808 | dprintk("NFS: %s: testing '%s'\n", __func__, clp->cl_hostname); | |
1809 | ||
1810 | len = NFS_MAX_SECFLAVORS; | |
1811 | flavors = kcalloc(len, sizeof(*flavors), GFP_KERNEL); | |
1812 | if (flavors == NULL) { | |
1813 | status = -ENOMEM; | |
1814 | goto out; | |
1815 | } | |
1816 | len = rpcauth_list_flavors(flavors, len); | |
1817 | if (len < 0) { | |
1818 | status = len; | |
1819 | goto out_free; | |
1820 | } | |
1821 | clnt = clp->cl_rpcclient; | |
1822 | save = clnt->cl_auth->au_flavor; | |
1823 | i = 0; | |
1824 | ||
1825 | mutex_lock(&nfs_clid_init_mutex); | |
1826 | status = -ENOENT; | |
1827 | again: | |
1828 | cred = ops->get_clid_cred(clp); | |
1829 | if (cred == NULL) | |
1830 | goto out_unlock; | |
1831 | ||
1832 | status = ops->detect_trunking(clp, result, cred); | |
1833 | put_rpccred(cred); | |
1834 | switch (status) { | |
1835 | case 0: | |
1836 | break; | |
1837 | ||
1838 | case -EACCES: | |
1839 | if (clp->cl_machine_cred == NULL) | |
1840 | break; | |
1841 | /* Handle case where the user hasn't set up machine creds */ | |
1842 | nfs4_clear_machine_cred(clp); | |
1843 | case -NFS4ERR_DELAY: | |
1844 | case -ETIMEDOUT: | |
1845 | case -EAGAIN: | |
1846 | ssleep(1); | |
1847 | dprintk("NFS: %s after status %d, retrying\n", | |
1848 | __func__, status); | |
1849 | goto again; | |
1850 | ||
1851 | case -NFS4ERR_CLID_INUSE: | |
1852 | case -NFS4ERR_WRONGSEC: | |
1853 | status = -EPERM; | |
1854 | if (i >= len) | |
1855 | break; | |
1856 | ||
1857 | flav = flavors[i++]; | |
1858 | if (flav == save) | |
1859 | flav = flavors[i++]; | |
1860 | clnt = rpc_clone_client_set_auth(clnt, flav); | |
1861 | if (IS_ERR(clnt)) { | |
1862 | status = PTR_ERR(clnt); | |
1863 | break; | |
1864 | } | |
1865 | clp->cl_rpcclient = clnt; | |
1866 | goto again; | |
1867 | ||
1868 | case -NFS4ERR_MINOR_VERS_MISMATCH: | |
1869 | status = -EPROTONOSUPPORT; | |
1870 | break; | |
1871 | ||
1872 | case -EKEYEXPIRED: | |
1873 | nfs4_warn_keyexpired(clp->cl_hostname); | |
1874 | case -NFS4ERR_NOT_SAME: /* FixMe: implement recovery | |
1875 | * in nfs4_exchange_id */ | |
1876 | status = -EKEYEXPIRED; | |
1877 | } | |
1878 | ||
1879 | out_unlock: | |
1880 | mutex_unlock(&nfs_clid_init_mutex); | |
1881 | out_free: | |
1882 | kfree(flavors); | |
1883 | out: | |
1884 | dprintk("NFS: %s: status = %d\n", __func__, status); | |
1885 | return status; | |
1886 | } | |
1887 | ||
76db6d95 | 1888 | #ifdef CONFIG_NFS_V4_1 |
9f594791 | 1889 | void nfs4_schedule_session_recovery(struct nfs4_session *session, int err) |
0400a6b0 | 1890 | { |
444f72fe TM |
1891 | struct nfs_client *clp = session->clp; |
1892 | ||
9f594791 TM |
1893 | switch (err) { |
1894 | default: | |
1895 | set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); | |
1896 | break; | |
1897 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
1898 | set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); | |
1899 | } | |
444f72fe | 1900 | nfs4_schedule_lease_recovery(clp); |
0400a6b0 | 1901 | } |
cbdabc7f | 1902 | EXPORT_SYMBOL_GPL(nfs4_schedule_session_recovery); |
0400a6b0 | 1903 | |
b9efa1b2 AA |
1904 | void nfs41_handle_recall_slot(struct nfs_client *clp) |
1905 | { | |
1906 | set_bit(NFS4CLNT_RECALL_SLOT, &clp->cl_state); | |
cc0a9843 TM |
1907 | dprintk("%s: scheduling slot recall for server %s\n", __func__, |
1908 | clp->cl_hostname); | |
0400a6b0 | 1909 | nfs4_schedule_state_manager(clp); |
b9efa1b2 AA |
1910 | } |
1911 | ||
0f79fd6f TM |
1912 | static void nfs4_reset_all_state(struct nfs_client *clp) |
1913 | { | |
1914 | if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) == 0) { | |
2c820d9a | 1915 | set_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state); |
be0bfed0 | 1916 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
0f79fd6f | 1917 | nfs4_state_start_reclaim_nograce(clp); |
cc0a9843 TM |
1918 | dprintk("%s: scheduling reset of all state for server %s!\n", |
1919 | __func__, clp->cl_hostname); | |
0400a6b0 | 1920 | nfs4_schedule_state_manager(clp); |
0f79fd6f TM |
1921 | } |
1922 | } | |
1923 | ||
1924 | static void nfs41_handle_server_reboot(struct nfs_client *clp) | |
1925 | { | |
1926 | if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) == 0) { | |
1927 | nfs4_state_start_reclaim_reboot(clp); | |
cc0a9843 TM |
1928 | dprintk("%s: server %s rebooted!\n", __func__, |
1929 | clp->cl_hostname); | |
0400a6b0 | 1930 | nfs4_schedule_state_manager(clp); |
0f79fd6f TM |
1931 | } |
1932 | } | |
1933 | ||
1934 | static void nfs41_handle_state_revoked(struct nfs_client *clp) | |
1935 | { | |
0f79fd6f | 1936 | nfs4_reset_all_state(clp); |
cc0a9843 | 1937 | dprintk("%s: state revoked on server %s\n", __func__, clp->cl_hostname); |
0f79fd6f TM |
1938 | } |
1939 | ||
1940 | static void nfs41_handle_recallable_state_revoked(struct nfs_client *clp) | |
1941 | { | |
1942 | /* This will need to handle layouts too */ | |
1943 | nfs_expire_all_delegations(clp); | |
cc0a9843 TM |
1944 | dprintk("%s: Recallable state revoked on server %s!\n", __func__, |
1945 | clp->cl_hostname); | |
0f79fd6f TM |
1946 | } |
1947 | ||
a9e64442 | 1948 | static void nfs41_handle_backchannel_fault(struct nfs_client *clp) |
0f79fd6f TM |
1949 | { |
1950 | nfs_expire_all_delegations(clp); | |
1951 | if (test_and_set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state) == 0) | |
0400a6b0 | 1952 | nfs4_schedule_state_manager(clp); |
cc0a9843 TM |
1953 | dprintk("%s: server %s declared a backchannel fault\n", __func__, |
1954 | clp->cl_hostname); | |
0f79fd6f TM |
1955 | } |
1956 | ||
a9e64442 WAA |
1957 | static void nfs41_handle_cb_path_down(struct nfs_client *clp) |
1958 | { | |
1959 | if (test_and_set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, | |
1960 | &clp->cl_state) == 0) | |
1961 | nfs4_schedule_state_manager(clp); | |
1962 | } | |
1963 | ||
0629e370 AB |
1964 | void nfs41_handle_sequence_flag_errors(struct nfs_client *clp, u32 flags) |
1965 | { | |
1966 | if (!flags) | |
1967 | return; | |
2c820d9a CL |
1968 | |
1969 | dprintk("%s: \"%s\" (client ID %llx) flags=0x%08x\n", | |
1970 | __func__, clp->cl_hostname, clp->cl_clientid, flags); | |
1971 | ||
111d489f | 1972 | if (flags & SEQ4_STATUS_RESTART_RECLAIM_NEEDED) |
0f79fd6f | 1973 | nfs41_handle_server_reboot(clp); |
111d489f | 1974 | if (flags & (SEQ4_STATUS_EXPIRED_ALL_STATE_REVOKED | |
0629e370 AB |
1975 | SEQ4_STATUS_EXPIRED_SOME_STATE_REVOKED | |
1976 | SEQ4_STATUS_ADMIN_STATE_REVOKED | | |
0f79fd6f TM |
1977 | SEQ4_STATUS_LEASE_MOVED)) |
1978 | nfs41_handle_state_revoked(clp); | |
111d489f | 1979 | if (flags & SEQ4_STATUS_RECALLABLE_STATE_REVOKED) |
0f79fd6f | 1980 | nfs41_handle_recallable_state_revoked(clp); |
a9e64442 WAA |
1981 | if (flags & SEQ4_STATUS_BACKCHANNEL_FAULT) |
1982 | nfs41_handle_backchannel_fault(clp); | |
1983 | else if (flags & (SEQ4_STATUS_CB_PATH_DOWN | | |
1984 | SEQ4_STATUS_CB_PATH_DOWN_SESSION)) | |
0f79fd6f | 1985 | nfs41_handle_cb_path_down(clp); |
0629e370 AB |
1986 | } |
1987 | ||
c3fad1b1 AA |
1988 | static int nfs4_reset_session(struct nfs_client *clp) |
1989 | { | |
848f5bda | 1990 | struct rpc_cred *cred; |
c3fad1b1 AA |
1991 | int status; |
1992 | ||
1a47e7a6 TM |
1993 | if (!nfs4_has_session(clp)) |
1994 | return 0; | |
38045412 | 1995 | nfs4_begin_drain_session(clp); |
848f5bda TM |
1996 | cred = nfs4_get_exchange_id_cred(clp); |
1997 | status = nfs4_proc_destroy_session(clp->cl_session, cred); | |
c3fad1b1 AA |
1998 | if (status && status != -NFS4ERR_BADSESSION && |
1999 | status != -NFS4ERR_DEADSESSION) { | |
f455848a | 2000 | status = nfs4_recovery_handle_error(clp, status); |
c3fad1b1 AA |
2001 | goto out; |
2002 | } | |
2003 | ||
2004 | memset(clp->cl_session->sess_id.data, 0, NFS4_MAX_SESSIONID_LEN); | |
848f5bda | 2005 | status = nfs4_proc_create_session(clp, cred); |
41f54a55 | 2006 | if (status) { |
cc0a9843 TM |
2007 | dprintk("%s: session reset failed with status %d for server %s!\n", |
2008 | __func__, status, clp->cl_hostname); | |
f2c1b510 | 2009 | status = nfs4_handle_reclaim_lease_error(clp, status); |
41f54a55 AA |
2010 | goto out; |
2011 | } | |
bda197f5 | 2012 | nfs41_finish_session_reset(clp); |
cc0a9843 TM |
2013 | dprintk("%s: session reset was successful for server %s!\n", |
2014 | __func__, clp->cl_hostname); | |
41f54a55 | 2015 | out: |
848f5bda TM |
2016 | if (cred) |
2017 | put_rpccred(cred); | |
c3fad1b1 AA |
2018 | return status; |
2019 | } | |
76db6d95 | 2020 | |
b9efa1b2 AA |
2021 | static int nfs4_recall_slot(struct nfs_client *clp) |
2022 | { | |
60f00153 | 2023 | struct nfs4_slot_table *fc_tbl; |
b9efa1b2 AA |
2024 | struct nfs4_slot *new, *old; |
2025 | int i; | |
2026 | ||
60f00153 TM |
2027 | if (!nfs4_has_session(clp)) |
2028 | return 0; | |
b9efa1b2 | 2029 | nfs4_begin_drain_session(clp); |
60f00153 | 2030 | fc_tbl = &clp->cl_session->fc_slot_table; |
b9efa1b2 | 2031 | new = kmalloc(fc_tbl->target_max_slots * sizeof(struct nfs4_slot), |
8535b2be | 2032 | GFP_NOFS); |
b9efa1b2 AA |
2033 | if (!new) |
2034 | return -ENOMEM; | |
2035 | ||
2036 | spin_lock(&fc_tbl->slot_tbl_lock); | |
2037 | for (i = 0; i < fc_tbl->target_max_slots; i++) | |
2038 | new[i].seq_nr = fc_tbl->slots[i].seq_nr; | |
2039 | old = fc_tbl->slots; | |
2040 | fc_tbl->slots = new; | |
2041 | fc_tbl->max_slots = fc_tbl->target_max_slots; | |
2042 | fc_tbl->target_max_slots = 0; | |
60f00153 | 2043 | clp->cl_session->fc_attrs.max_reqs = fc_tbl->max_slots; |
b9efa1b2 AA |
2044 | spin_unlock(&fc_tbl->slot_tbl_lock); |
2045 | ||
2046 | kfree(old); | |
b9efa1b2 AA |
2047 | return 0; |
2048 | } | |
2049 | ||
a9e64442 WAA |
2050 | static int nfs4_bind_conn_to_session(struct nfs_client *clp) |
2051 | { | |
2cf047c9 TM |
2052 | struct rpc_cred *cred; |
2053 | int ret; | |
2054 | ||
1a47e7a6 TM |
2055 | if (!nfs4_has_session(clp)) |
2056 | return 0; | |
43ac544c | 2057 | nfs4_begin_drain_session(clp); |
2cf047c9 TM |
2058 | cred = nfs4_get_exchange_id_cred(clp); |
2059 | ret = nfs4_proc_bind_conn_to_session(clp, cred); | |
2060 | if (cred) | |
2061 | put_rpccred(cred); | |
43ac544c | 2062 | clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); |
bf674c82 TM |
2063 | switch (ret) { |
2064 | case 0: | |
cc0a9843 TM |
2065 | dprintk("%s: bind_conn_to_session was successful for server %s!\n", |
2066 | __func__, clp->cl_hostname); | |
bf674c82 TM |
2067 | break; |
2068 | case -NFS4ERR_DELAY: | |
2069 | ssleep(1); | |
2070 | set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); | |
2071 | break; | |
2072 | default: | |
2073 | return nfs4_recovery_handle_error(clp, ret); | |
2074 | } | |
2075 | return 0; | |
a9e64442 | 2076 | } |
76db6d95 | 2077 | #else /* CONFIG_NFS_V4_1 */ |
c3fad1b1 | 2078 | static int nfs4_reset_session(struct nfs_client *clp) { return 0; } |
5601a00d | 2079 | static int nfs4_end_drain_session(struct nfs_client *clp) { return 0; } |
b9efa1b2 | 2080 | static int nfs4_recall_slot(struct nfs_client *clp) { return 0; } |
a9e64442 WAA |
2081 | |
2082 | static int nfs4_bind_conn_to_session(struct nfs_client *clp) | |
2083 | { | |
2084 | return 0; | |
2085 | } | |
76db6d95 AA |
2086 | #endif /* CONFIG_NFS_V4_1 */ |
2087 | ||
e005e804 | 2088 | static void nfs4_state_manager(struct nfs_client *clp) |
02860014 | 2089 | { |
02860014 | 2090 | int status = 0; |
8ed27d4f | 2091 | const char *section = "", *section_sep = ""; |
02860014 | 2092 | |
02860014 | 2093 | /* Ensure exclusive access to NFSv4 state */ |
47c2199b | 2094 | do { |
2c820d9a | 2095 | if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) { |
8ed27d4f | 2096 | section = "purge state"; |
b42353ff | 2097 | status = nfs4_purge_lease(clp); |
2a6ee6aa TM |
2098 | if (status < 0) |
2099 | goto out_error; | |
b42353ff | 2100 | continue; |
2c820d9a CL |
2101 | } |
2102 | ||
b42353ff | 2103 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) { |
8ed27d4f | 2104 | section = "lease expired"; |
b79a4a1b TM |
2105 | /* We're going to have to re-establish a clientid */ |
2106 | status = nfs4_reclaim_lease(clp); | |
2a6ee6aa | 2107 | if (status < 0) |
b79a4a1b | 2108 | goto out_error; |
b42353ff | 2109 | continue; |
e598d843 TM |
2110 | } |
2111 | ||
2112 | if (test_and_clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state)) { | |
8ed27d4f | 2113 | section = "check lease"; |
e598d843 | 2114 | status = nfs4_check_lease(clp); |
4f38e4aa TM |
2115 | if (status < 0) |
2116 | goto out_error; | |
b6d408ba | 2117 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
e598d843 | 2118 | continue; |
b79a4a1b | 2119 | } |
b6d408ba | 2120 | |
c3fad1b1 | 2121 | /* Initialize or reset the session */ |
1a47e7a6 | 2122 | if (test_and_clear_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state)) { |
8ed27d4f | 2123 | section = "reset session"; |
4d643d1d | 2124 | status = nfs4_reset_session(clp); |
b6d408ba TM |
2125 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
2126 | continue; | |
2127 | if (status < 0) | |
76db6d95 | 2128 | goto out_error; |
76db6d95 | 2129 | } |
b6d408ba | 2130 | |
a9e64442 WAA |
2131 | /* Send BIND_CONN_TO_SESSION */ |
2132 | if (test_and_clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION, | |
1a47e7a6 | 2133 | &clp->cl_state)) { |
8ed27d4f | 2134 | section = "bind conn to session"; |
a9e64442 WAA |
2135 | status = nfs4_bind_conn_to_session(clp); |
2136 | if (status < 0) | |
2137 | goto out_error; | |
bf674c82 | 2138 | continue; |
a9e64442 WAA |
2139 | } |
2140 | ||
1a2dd948 | 2141 | /* Recall session slots */ |
60f00153 | 2142 | if (test_and_clear_bit(NFS4CLNT_RECALL_SLOT, &clp->cl_state)) { |
1a2dd948 TM |
2143 | section = "recall slot"; |
2144 | status = nfs4_recall_slot(clp); | |
2145 | if (status < 0) | |
2146 | goto out_error; | |
2147 | continue; | |
2148 | } | |
2149 | ||
b79a4a1b | 2150 | /* First recover reboot state... */ |
e345e88a | 2151 | if (test_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) { |
8ed27d4f | 2152 | section = "reclaim reboot"; |
591d71cb | 2153 | status = nfs4_do_reclaim(clp, |
c48f4f35 | 2154 | clp->cl_mvops->reboot_recovery_ops); |
b6d408ba | 2155 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) || |
6df08189 | 2156 | test_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state)) |
c3fad1b1 | 2157 | continue; |
b79a4a1b | 2158 | nfs4_state_end_reclaim_reboot(clp); |
b6d408ba TM |
2159 | if (test_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) |
2160 | continue; | |
2161 | if (status < 0) | |
2162 | goto out_error; | |
02860014 TM |
2163 | } |
2164 | ||
b79a4a1b TM |
2165 | /* Now recover expired state... */ |
2166 | if (test_and_clear_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) { | |
8ed27d4f | 2167 | section = "reclaim nograce"; |
591d71cb | 2168 | status = nfs4_do_reclaim(clp, |
c48f4f35 | 2169 | clp->cl_mvops->nograce_recovery_ops); |
b6d408ba | 2170 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) || |
6df08189 | 2171 | test_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state) || |
b6d408ba TM |
2172 | test_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) |
2173 | continue; | |
2174 | if (status < 0) | |
b79a4a1b | 2175 | goto out_error; |
1da177e4 | 2176 | } |
707fb4b3 | 2177 | |
5601a00d | 2178 | nfs4_end_drain_session(clp); |
707fb4b3 TM |
2179 | if (test_and_clear_bit(NFS4CLNT_DELEGRETURN, &clp->cl_state)) { |
2180 | nfs_client_return_marked_delegations(clp); | |
2181 | continue; | |
2182 | } | |
e005e804 TM |
2183 | |
2184 | nfs4_clear_state_manager_bit(clp); | |
f3c76491 TM |
2185 | /* Did we race with an attempt to give us more work? */ |
2186 | if (clp->cl_state == 0) | |
2187 | break; | |
2188 | if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) != 0) | |
2189 | break; | |
47c2199b | 2190 | } while (atomic_read(&clp->cl_count) > 1); |
e005e804 | 2191 | return; |
1da177e4 | 2192 | out_error: |
8ed27d4f WAA |
2193 | if (strlen(section)) |
2194 | section_sep = ": "; | |
2195 | pr_warn_ratelimited("NFS: state manager%s%s failed on NFSv4 server %s" | |
2196 | " with error %d\n", section_sep, section, | |
2197 | clp->cl_hostname, -status); | |
ffe5a830 | 2198 | ssleep(1); |
5601a00d | 2199 | nfs4_end_drain_session(clp); |
e005e804 TM |
2200 | nfs4_clear_state_manager_bit(clp); |
2201 | } | |
2202 | ||
2203 | static int nfs4_run_state_manager(void *ptr) | |
2204 | { | |
2205 | struct nfs_client *clp = ptr; | |
2206 | ||
2207 | allow_signal(SIGKILL); | |
2208 | nfs4_state_manager(clp); | |
2209 | nfs_put_client(clp); | |
2210 | module_put_and_exit(0); | |
2211 | return 0; | |
1da177e4 LT |
2212 | } |
2213 | ||
2214 | /* | |
2215 | * Local variables: | |
2216 | * c-basic-offset: 8 | |
2217 | * End: | |
2218 | */ |