Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * fs/nfs/nfs4state.c | |
3 | * | |
4 | * Client-side XDR for NFSv4. | |
5 | * | |
6 | * Copyright (c) 2002 The Regents of the University of Michigan. | |
7 | * All rights reserved. | |
8 | * | |
9 | * Kendrick Smith <kmsmith@umich.edu> | |
10 | * | |
11 | * Redistribution and use in source and binary forms, with or without | |
12 | * modification, are permitted provided that the following conditions | |
13 | * are met: | |
14 | * | |
15 | * 1. Redistributions of source code must retain the above copyright | |
16 | * notice, this list of conditions and the following disclaimer. | |
17 | * 2. Redistributions in binary form must reproduce the above copyright | |
18 | * notice, this list of conditions and the following disclaimer in the | |
19 | * documentation and/or other materials provided with the distribution. | |
20 | * 3. Neither the name of the University nor the names of its | |
21 | * contributors may be used to endorse or promote products derived | |
22 | * from this software without specific prior written permission. | |
23 | * | |
24 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
25 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
26 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
27 | * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
28 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
29 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
30 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR | |
31 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
32 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
33 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
34 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
35 | * | |
36 | * Implementation of the NFSv4 state model. For the time being, | |
37 | * this is minimal, but will be made much more complex in a | |
38 | * subsequent patch. | |
39 | */ | |
40 | ||
6f43ddcc | 41 | #include <linux/kernel.h> |
1da177e4 | 42 | #include <linux/slab.h> |
b89f4321 | 43 | #include <linux/fs.h> |
1da177e4 | 44 | #include <linux/nfs_fs.h> |
5043e900 TM |
45 | #include <linux/kthread.h> |
46 | #include <linux/module.h> | |
9f958ab8 | 47 | #include <linux/random.h> |
8c7597f6 | 48 | #include <linux/ratelimit.h> |
1da177e4 LT |
49 | #include <linux/workqueue.h> |
50 | #include <linux/bitops.h> | |
0aaaf5c4 | 51 | #include <linux/jiffies.h> |
1da177e4 | 52 | |
05f4c350 CL |
53 | #include <linux/sunrpc/clnt.h> |
54 | ||
4ce79717 | 55 | #include "nfs4_fs.h" |
1da177e4 LT |
56 | #include "callback.h" |
57 | #include "delegation.h" | |
24c8dbbb | 58 | #include "internal.h" |
40c64c26 | 59 | #include "nfs4idmap.h" |
76e697ba | 60 | #include "nfs4session.h" |
974cec8c | 61 | #include "pnfs.h" |
bbe0a3aa | 62 | #include "netns.h" |
1da177e4 | 63 | |
e3c0fb7e CL |
64 | #define NFSDBG_FACILITY NFSDBG_STATE |
65 | ||
1da177e4 LT |
66 | #define OPENOWNER_POOL_SIZE 8 |
67 | ||
93b717fd | 68 | const nfs4_stateid zero_stateid = { |
e0714ec4 | 69 | { .data = { 0 } }, |
93b717fd TM |
70 | .type = NFS4_SPECIAL_STATEID_TYPE, |
71 | }; | |
05f4c350 | 72 | static DEFINE_MUTEX(nfs_clid_init_mutex); |
1da177e4 | 73 | |
591d71cb | 74 | int nfs4_init_clientid(struct nfs_client *clp, struct rpc_cred *cred) |
1da177e4 | 75 | { |
fd954ae1 TM |
76 | struct nfs4_setclientid_res clid = { |
77 | .clientid = clp->cl_clientid, | |
78 | .confirm = clp->cl_confirm, | |
79 | }; | |
f738f517 CL |
80 | unsigned short port; |
81 | int status; | |
bbe0a3aa | 82 | struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); |
f738f517 | 83 | |
fd954ae1 TM |
84 | if (test_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state)) |
85 | goto do_confirm; | |
bbe0a3aa | 86 | port = nn->nfs_callback_tcpport; |
f738f517 | 87 | if (clp->cl_addr.ss_family == AF_INET6) |
29dcc16a | 88 | port = nn->nfs_callback_tcpport6; |
f738f517 | 89 | |
bb8b27e5 TM |
90 | status = nfs4_proc_setclientid(clp, NFS4_CALLBACK, port, cred, &clid); |
91 | if (status != 0) | |
92 | goto out; | |
fd954ae1 TM |
93 | clp->cl_clientid = clid.clientid; |
94 | clp->cl_confirm = clid.confirm; | |
95 | set_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); | |
96 | do_confirm: | |
bb8b27e5 TM |
97 | status = nfs4_proc_setclientid_confirm(clp, &clid, cred); |
98 | if (status != 0) | |
99 | goto out; | |
fd954ae1 | 100 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
bb8b27e5 TM |
101 | nfs4_schedule_state_renewal(clp); |
102 | out: | |
1da177e4 LT |
103 | return status; |
104 | } | |
105 | ||
05f4c350 CL |
106 | /** |
107 | * nfs40_discover_server_trunking - Detect server IP address trunking (mv0) | |
108 | * | |
109 | * @clp: nfs_client under test | |
110 | * @result: OUT: found nfs_client, or clp | |
111 | * @cred: credential to use for trunking test | |
112 | * | |
113 | * Returns zero, a negative errno, or a negative NFS4ERR status. | |
114 | * If zero is returned, an nfs_client pointer is planted in | |
115 | * "result". | |
116 | * | |
117 | * Note: The returned client may not yet be marked ready. | |
118 | */ | |
119 | int nfs40_discover_server_trunking(struct nfs_client *clp, | |
120 | struct nfs_client **result, | |
121 | struct rpc_cred *cred) | |
122 | { | |
123 | struct nfs4_setclientid_res clid = { | |
124 | .clientid = clp->cl_clientid, | |
125 | .confirm = clp->cl_confirm, | |
126 | }; | |
9f62387d | 127 | struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); |
05f4c350 CL |
128 | unsigned short port; |
129 | int status; | |
130 | ||
9f62387d | 131 | port = nn->nfs_callback_tcpport; |
05f4c350 | 132 | if (clp->cl_addr.ss_family == AF_INET6) |
9f62387d | 133 | port = nn->nfs_callback_tcpport6; |
05f4c350 CL |
134 | |
135 | status = nfs4_proc_setclientid(clp, NFS4_CALLBACK, port, cred, &clid); | |
136 | if (status != 0) | |
137 | goto out; | |
138 | clp->cl_clientid = clid.clientid; | |
139 | clp->cl_confirm = clid.confirm; | |
140 | ||
141 | status = nfs40_walk_client_list(clp, result, cred); | |
202c312d | 142 | if (status == 0) { |
05f4c350 CL |
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); | |
05f4c350 | 146 | } |
05f4c350 CL |
147 | out: |
148 | return status; | |
149 | } | |
150 | ||
a7b72103 | 151 | struct rpc_cred *nfs4_get_machine_cred_locked(struct nfs_client *clp) |
a2b2bb88 TM |
152 | { |
153 | struct rpc_cred *cred = NULL; | |
154 | ||
a2b2bb88 TM |
155 | if (clp->cl_machine_cred != NULL) |
156 | cred = get_rpccred(clp->cl_machine_cred); | |
a2b2bb88 TM |
157 | return cred; |
158 | } | |
159 | ||
d688f7b8 CL |
160 | static void nfs4_root_machine_cred(struct nfs_client *clp) |
161 | { | |
162 | struct rpc_cred *cred, *new; | |
163 | ||
164 | new = rpc_lookup_machine_cred(NULL); | |
165 | spin_lock(&clp->cl_lock); | |
166 | cred = clp->cl_machine_cred; | |
167 | clp->cl_machine_cred = new; | |
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 | ||
62f288a0 | 221 | static void nfs4_end_drain_slot_table(struct nfs4_slot_table *tbl) |
9dfdf404 | 222 | { |
774d5f14 | 223 | if (test_and_clear_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state)) { |
961a828d | 224 | spin_lock(&tbl->slot_tbl_lock); |
b75ad4cd | 225 | nfs41_wake_slot_table(tbl); |
961a828d | 226 | spin_unlock(&tbl->slot_tbl_lock); |
689cf5c1 | 227 | } |
9dfdf404 RL |
228 | } |
229 | ||
62f288a0 AA |
230 | static void nfs4_end_drain_session(struct nfs_client *clp) |
231 | { | |
232 | struct nfs4_session *ses = clp->cl_session; | |
233 | ||
2cf8bca8 CL |
234 | if (clp->cl_slot_tbl) { |
235 | nfs4_end_drain_slot_table(clp->cl_slot_tbl); | |
236 | return; | |
237 | } | |
238 | ||
62f288a0 AA |
239 | if (ses != NULL) { |
240 | nfs4_end_drain_slot_table(&ses->bc_slot_table); | |
241 | nfs4_end_drain_slot_table(&ses->fc_slot_table); | |
242 | } | |
243 | } | |
244 | ||
774d5f14 | 245 | static int nfs4_drain_slot_tbl(struct nfs4_slot_table *tbl) |
9dfdf404 | 246 | { |
774d5f14 | 247 | set_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state); |
9dfdf404 | 248 | spin_lock(&tbl->slot_tbl_lock); |
b6bf6e7d | 249 | if (tbl->highest_used_slotid != NFS4_NO_SLOT) { |
16735d02 | 250 | reinit_completion(&tbl->complete); |
9dfdf404 | 251 | spin_unlock(&tbl->slot_tbl_lock); |
42acd021 | 252 | return wait_for_completion_interruptible(&tbl->complete); |
9dfdf404 RL |
253 | } |
254 | spin_unlock(&tbl->slot_tbl_lock); | |
255 | return 0; | |
256 | } | |
257 | ||
42acd021 AA |
258 | static int nfs4_begin_drain_session(struct nfs_client *clp) |
259 | { | |
260 | struct nfs4_session *ses = clp->cl_session; | |
261 | int ret = 0; | |
262 | ||
2cf8bca8 CL |
263 | if (clp->cl_slot_tbl) |
264 | return nfs4_drain_slot_tbl(clp->cl_slot_tbl); | |
265 | ||
42acd021 | 266 | /* back channel */ |
774d5f14 | 267 | ret = nfs4_drain_slot_tbl(&ses->bc_slot_table); |
42acd021 AA |
268 | if (ret) |
269 | return ret; | |
270 | /* fore channel */ | |
774d5f14 | 271 | return nfs4_drain_slot_tbl(&ses->fc_slot_table); |
42acd021 AA |
272 | } |
273 | ||
c9fdeb28 CL |
274 | #if defined(CONFIG_NFS_V4_1) |
275 | ||
2cf8bca8 CL |
276 | static int nfs41_setup_state_renewal(struct nfs_client *clp) |
277 | { | |
278 | int status; | |
279 | struct nfs_fsinfo fsinfo; | |
fb10fb67 | 280 | unsigned long now; |
2cf8bca8 CL |
281 | |
282 | if (!test_bit(NFS_CS_CHECK_LEASE_TIME, &clp->cl_res_state)) { | |
283 | nfs4_schedule_state_renewal(clp); | |
284 | return 0; | |
285 | } | |
286 | ||
fb10fb67 | 287 | now = jiffies; |
2cf8bca8 CL |
288 | status = nfs4_proc_get_lease_time(clp, &fsinfo); |
289 | if (status == 0) { | |
fb10fb67 | 290 | nfs4_set_lease_period(clp, fsinfo.lease_time * HZ, now); |
2cf8bca8 CL |
291 | nfs4_schedule_state_renewal(clp); |
292 | } | |
293 | ||
294 | return status; | |
295 | } | |
296 | ||
bda197f5 TM |
297 | static void nfs41_finish_session_reset(struct nfs_client *clp) |
298 | { | |
299 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); | |
300 | clear_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); | |
301 | /* create_session negotiated new slot table */ | |
bda197f5 TM |
302 | clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); |
303 | nfs41_setup_state_renewal(clp); | |
304 | } | |
305 | ||
4d643d1d AA |
306 | int nfs41_init_clientid(struct nfs_client *clp, struct rpc_cred *cred) |
307 | { | |
308 | int status; | |
309 | ||
fd954ae1 TM |
310 | if (test_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state)) |
311 | goto do_confirm; | |
4d643d1d | 312 | status = nfs4_proc_exchange_id(clp, cred); |
9430fb6b RL |
313 | if (status != 0) |
314 | goto out; | |
fd954ae1 TM |
315 | set_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
316 | do_confirm: | |
848f5bda | 317 | status = nfs4_proc_create_session(clp, cred); |
9430fb6b RL |
318 | if (status != 0) |
319 | goto out; | |
bda197f5 | 320 | nfs41_finish_session_reset(clp); |
9430fb6b RL |
321 | nfs_mark_client_ready(clp, NFS_CS_READY); |
322 | out: | |
4d643d1d AA |
323 | return status; |
324 | } | |
325 | ||
05f4c350 CL |
326 | /** |
327 | * nfs41_discover_server_trunking - Detect server IP address trunking (mv1) | |
328 | * | |
329 | * @clp: nfs_client under test | |
330 | * @result: OUT: found nfs_client, or clp | |
331 | * @cred: credential to use for trunking test | |
332 | * | |
333 | * Returns NFS4_OK, a negative errno, or a negative NFS4ERR status. | |
334 | * If NFS4_OK is returned, an nfs_client pointer is planted in | |
335 | * "result". | |
336 | * | |
337 | * Note: The returned client may not yet be marked ready. | |
338 | */ | |
339 | int nfs41_discover_server_trunking(struct nfs_client *clp, | |
340 | struct nfs_client **result, | |
341 | struct rpc_cred *cred) | |
342 | { | |
343 | int status; | |
344 | ||
345 | status = nfs4_proc_exchange_id(clp, cred); | |
346 | if (status != NFS4_OK) | |
347 | return status; | |
348 | ||
48d66b97 TM |
349 | status = nfs41_walk_client_list(clp, result, cred); |
350 | if (status < 0) | |
351 | return status; | |
352 | if (clp != *result) | |
353 | return 0; | |
354 | ||
e11259f9 TM |
355 | /* Purge state if the client id was established in a prior instance */ |
356 | if (clp->cl_exchange_flags & EXCHGID4_FLAG_CONFIRMED_R) | |
357 | set_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state); | |
358 | else | |
359 | set_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); | |
48d66b97 TM |
360 | nfs4_schedule_state_manager(clp); |
361 | status = nfs_wait_client_init_complete(clp); | |
362 | if (status < 0) | |
363 | nfs_put_client(clp); | |
364 | return status; | |
05f4c350 CL |
365 | } |
366 | ||
b4b82607 AA |
367 | #endif /* CONFIG_NFS_V4_1 */ |
368 | ||
24d292b8 | 369 | /** |
73d8bde5 | 370 | * nfs4_get_clid_cred - Acquire credential for a setclientid operation |
24d292b8 CL |
371 | * @clp: client state handle |
372 | * | |
373 | * Returns an rpc_cred with reference count bumped, or NULL. | |
374 | */ | |
73d8bde5 | 375 | struct rpc_cred *nfs4_get_clid_cred(struct nfs_client *clp) |
24d292b8 | 376 | { |
a2b2bb88 | 377 | struct rpc_cred *cred; |
286d7d6a | 378 | |
6dc9d57a TM |
379 | spin_lock(&clp->cl_lock); |
380 | cred = nfs4_get_machine_cred_locked(clp); | |
24d292b8 | 381 | spin_unlock(&clp->cl_lock); |
a2b2bb88 | 382 | return cred; |
286d7d6a TM |
383 | } |
384 | ||
1da177e4 | 385 | static struct nfs4_state_owner * |
24d292b8 | 386 | nfs4_find_state_owner_locked(struct nfs_server *server, struct rpc_cred *cred) |
1da177e4 | 387 | { |
24d292b8 | 388 | struct rb_node **p = &server->state_owners.rb_node, |
9f958ab8 | 389 | *parent = NULL; |
414adf14 | 390 | struct nfs4_state_owner *sp; |
1da177e4 | 391 | |
9f958ab8 TM |
392 | while (*p != NULL) { |
393 | parent = *p; | |
24d292b8 | 394 | sp = rb_entry(parent, struct nfs4_state_owner, so_server_node); |
9f958ab8 TM |
395 | |
396 | if (cred < sp->so_cred) | |
397 | p = &parent->rb_left; | |
398 | else if (cred > sp->so_cred) | |
399 | p = &parent->rb_right; | |
400 | else { | |
0aaaf5c4 CL |
401 | if (!list_empty(&sp->so_lru)) |
402 | list_del_init(&sp->so_lru); | |
9f958ab8 | 403 | atomic_inc(&sp->so_count); |
414adf14 | 404 | return sp; |
9f958ab8 | 405 | } |
1da177e4 | 406 | } |
414adf14 | 407 | return NULL; |
1da177e4 LT |
408 | } |
409 | ||
9f958ab8 | 410 | static struct nfs4_state_owner * |
24d292b8 | 411 | nfs4_insert_state_owner_locked(struct nfs4_state_owner *new) |
9f958ab8 | 412 | { |
24d292b8 CL |
413 | struct nfs_server *server = new->so_server; |
414 | struct rb_node **p = &server->state_owners.rb_node, | |
9f958ab8 TM |
415 | *parent = NULL; |
416 | struct nfs4_state_owner *sp; | |
9157c31d | 417 | int err; |
9f958ab8 TM |
418 | |
419 | while (*p != NULL) { | |
420 | parent = *p; | |
24d292b8 | 421 | sp = rb_entry(parent, struct nfs4_state_owner, so_server_node); |
9f958ab8 TM |
422 | |
423 | if (new->so_cred < sp->so_cred) | |
424 | p = &parent->rb_left; | |
425 | else if (new->so_cred > sp->so_cred) | |
426 | p = &parent->rb_right; | |
427 | else { | |
0aaaf5c4 CL |
428 | if (!list_empty(&sp->so_lru)) |
429 | list_del_init(&sp->so_lru); | |
9f958ab8 TM |
430 | atomic_inc(&sp->so_count); |
431 | return sp; | |
432 | } | |
433 | } | |
48c22eb2 | 434 | err = ida_get_new(&server->openowner_id, &new->so_seqid.owner_id); |
9157c31d TM |
435 | if (err) |
436 | return ERR_PTR(err); | |
24d292b8 CL |
437 | rb_link_node(&new->so_server_node, parent, p); |
438 | rb_insert_color(&new->so_server_node, &server->state_owners); | |
9f958ab8 TM |
439 | return new; |
440 | } | |
441 | ||
442 | static void | |
24d292b8 | 443 | nfs4_remove_state_owner_locked(struct nfs4_state_owner *sp) |
9f958ab8 | 444 | { |
24d292b8 CL |
445 | struct nfs_server *server = sp->so_server; |
446 | ||
447 | if (!RB_EMPTY_NODE(&sp->so_server_node)) | |
448 | rb_erase(&sp->so_server_node, &server->state_owners); | |
48c22eb2 | 449 | ida_remove(&server->openowner_id, sp->so_seqid.owner_id); |
9f958ab8 TM |
450 | } |
451 | ||
7ba127ab TM |
452 | static void |
453 | nfs4_init_seqid_counter(struct nfs_seqid_counter *sc) | |
454 | { | |
95b72eb0 | 455 | sc->create_time = ktime_get(); |
7ba127ab TM |
456 | sc->flags = 0; |
457 | sc->counter = 0; | |
458 | spin_lock_init(&sc->lock); | |
459 | INIT_LIST_HEAD(&sc->list); | |
460 | rpc_init_wait_queue(&sc->wait, "Seqid_waitqueue"); | |
461 | } | |
462 | ||
463 | static void | |
464 | nfs4_destroy_seqid_counter(struct nfs_seqid_counter *sc) | |
465 | { | |
466 | rpc_destroy_wait_queue(&sc->wait); | |
467 | } | |
468 | ||
1da177e4 LT |
469 | /* |
470 | * nfs4_alloc_state_owner(): this is called on the OPEN or CREATE path to | |
471 | * create a new state_owner. | |
472 | * | |
473 | */ | |
474 | static struct nfs4_state_owner * | |
d1e284d5 TM |
475 | nfs4_alloc_state_owner(struct nfs_server *server, |
476 | struct rpc_cred *cred, | |
477 | gfp_t gfp_flags) | |
1da177e4 LT |
478 | { |
479 | struct nfs4_state_owner *sp; | |
480 | ||
d1e284d5 | 481 | sp = kzalloc(sizeof(*sp), gfp_flags); |
1da177e4 LT |
482 | if (!sp) |
483 | return NULL; | |
d1e284d5 TM |
484 | sp->so_server = server; |
485 | sp->so_cred = get_rpccred(cred); | |
ec073428 | 486 | spin_lock_init(&sp->so_lock); |
1da177e4 | 487 | INIT_LIST_HEAD(&sp->so_states); |
7ba127ab | 488 | nfs4_init_seqid_counter(&sp->so_seqid); |
1da177e4 | 489 | atomic_set(&sp->so_count, 1); |
0aaaf5c4 | 490 | INIT_LIST_HEAD(&sp->so_lru); |
c137afab | 491 | seqcount_init(&sp->so_reclaim_seqcount); |
65b62a29 | 492 | mutex_init(&sp->so_delegreturn_mutex); |
1da177e4 LT |
493 | return sp; |
494 | } | |
495 | ||
1d2e88e7 | 496 | static void |
1da177e4 LT |
497 | nfs4_drop_state_owner(struct nfs4_state_owner *sp) |
498 | { | |
c77365c9 TM |
499 | struct rb_node *rb_node = &sp->so_server_node; |
500 | ||
501 | if (!RB_EMPTY_NODE(rb_node)) { | |
24d292b8 CL |
502 | struct nfs_server *server = sp->so_server; |
503 | struct nfs_client *clp = server->nfs_client; | |
9f958ab8 TM |
504 | |
505 | spin_lock(&clp->cl_lock); | |
c77365c9 TM |
506 | if (!RB_EMPTY_NODE(rb_node)) { |
507 | rb_erase(rb_node, &server->state_owners); | |
508 | RB_CLEAR_NODE(rb_node); | |
509 | } | |
9f958ab8 TM |
510 | spin_unlock(&clp->cl_lock); |
511 | } | |
1da177e4 LT |
512 | } |
513 | ||
0aaaf5c4 CL |
514 | static void nfs4_free_state_owner(struct nfs4_state_owner *sp) |
515 | { | |
7ba127ab | 516 | nfs4_destroy_seqid_counter(&sp->so_seqid); |
0aaaf5c4 CL |
517 | put_rpccred(sp->so_cred); |
518 | kfree(sp); | |
519 | } | |
520 | ||
521 | static void nfs4_gc_state_owners(struct nfs_server *server) | |
522 | { | |
523 | struct nfs_client *clp = server->nfs_client; | |
524 | struct nfs4_state_owner *sp, *tmp; | |
525 | unsigned long time_min, time_max; | |
526 | LIST_HEAD(doomed); | |
527 | ||
528 | spin_lock(&clp->cl_lock); | |
529 | time_max = jiffies; | |
530 | time_min = (long)time_max - (long)clp->cl_lease_time; | |
531 | list_for_each_entry_safe(sp, tmp, &server->state_owners_lru, so_lru) { | |
532 | /* NB: LRU is sorted so that oldest is at the head */ | |
533 | if (time_in_range(sp->so_expires, time_min, time_max)) | |
534 | break; | |
535 | list_move(&sp->so_lru, &doomed); | |
536 | nfs4_remove_state_owner_locked(sp); | |
537 | } | |
538 | spin_unlock(&clp->cl_lock); | |
539 | ||
540 | list_for_each_entry_safe(sp, tmp, &doomed, so_lru) { | |
541 | list_del(&sp->so_lru); | |
542 | nfs4_free_state_owner(sp); | |
543 | } | |
544 | } | |
545 | ||
24d292b8 CL |
546 | /** |
547 | * nfs4_get_state_owner - Look up a state owner given a credential | |
548 | * @server: nfs_server to search | |
549 | * @cred: RPC credential to match | |
550 | * | |
551 | * Returns a pointer to an instantiated nfs4_state_owner struct, or NULL. | |
552 | */ | |
553 | struct nfs4_state_owner *nfs4_get_state_owner(struct nfs_server *server, | |
d1e284d5 TM |
554 | struct rpc_cred *cred, |
555 | gfp_t gfp_flags) | |
1da177e4 | 556 | { |
7539bbab | 557 | struct nfs_client *clp = server->nfs_client; |
1da177e4 LT |
558 | struct nfs4_state_owner *sp, *new; |
559 | ||
1da177e4 | 560 | spin_lock(&clp->cl_lock); |
24d292b8 | 561 | sp = nfs4_find_state_owner_locked(server, cred); |
1da177e4 | 562 | spin_unlock(&clp->cl_lock); |
1da177e4 | 563 | if (sp != NULL) |
0aaaf5c4 | 564 | goto out; |
d1e284d5 | 565 | new = nfs4_alloc_state_owner(server, cred, gfp_flags); |
9f958ab8 | 566 | if (new == NULL) |
0aaaf5c4 | 567 | goto out; |
9157c31d TM |
568 | do { |
569 | if (ida_pre_get(&server->openowner_id, gfp_flags) == 0) | |
570 | break; | |
571 | spin_lock(&clp->cl_lock); | |
572 | sp = nfs4_insert_state_owner_locked(new); | |
573 | spin_unlock(&clp->cl_lock); | |
574 | } while (sp == ERR_PTR(-EAGAIN)); | |
d1e284d5 TM |
575 | if (sp != new) |
576 | nfs4_free_state_owner(new); | |
0aaaf5c4 CL |
577 | out: |
578 | nfs4_gc_state_owners(server); | |
9f958ab8 | 579 | return sp; |
1da177e4 LT |
580 | } |
581 | ||
24d292b8 CL |
582 | /** |
583 | * nfs4_put_state_owner - Release a nfs4_state_owner | |
584 | * @sp: state owner data to release | |
7bf97bc2 TM |
585 | * |
586 | * Note that we keep released state owners on an LRU | |
587 | * list. | |
588 | * This caches valid state owners so that they can be | |
589 | * reused, to avoid the OPEN_CONFIRM on minor version 0. | |
590 | * It also pins the uniquifier of dropped state owners for | |
591 | * a while, to ensure that those state owner names are | |
592 | * never reused. | |
24d292b8 | 593 | */ |
1da177e4 LT |
594 | void nfs4_put_state_owner(struct nfs4_state_owner *sp) |
595 | { | |
0aaaf5c4 CL |
596 | struct nfs_server *server = sp->so_server; |
597 | struct nfs_client *clp = server->nfs_client; | |
1da177e4 LT |
598 | |
599 | if (!atomic_dec_and_lock(&sp->so_count, &clp->cl_lock)) | |
600 | return; | |
0aaaf5c4 | 601 | |
7bf97bc2 TM |
602 | sp->so_expires = jiffies; |
603 | list_add_tail(&sp->so_lru, &server->state_owners_lru); | |
604 | spin_unlock(&clp->cl_lock); | |
0aaaf5c4 CL |
605 | } |
606 | ||
607 | /** | |
608 | * nfs4_purge_state_owners - Release all cached state owners | |
609 | * @server: nfs_server with cached state owners to release | |
610 | * | |
611 | * Called at umount time. Remaining state owners will be on | |
612 | * the LRU with ref count of zero. | |
613 | */ | |
614 | void nfs4_purge_state_owners(struct nfs_server *server) | |
615 | { | |
616 | struct nfs_client *clp = server->nfs_client; | |
617 | struct nfs4_state_owner *sp, *tmp; | |
618 | LIST_HEAD(doomed); | |
619 | ||
620 | spin_lock(&clp->cl_lock); | |
621 | list_for_each_entry_safe(sp, tmp, &server->state_owners_lru, so_lru) { | |
622 | list_move(&sp->so_lru, &doomed); | |
623 | nfs4_remove_state_owner_locked(sp); | |
624 | } | |
1da177e4 | 625 | spin_unlock(&clp->cl_lock); |
0aaaf5c4 CL |
626 | |
627 | list_for_each_entry_safe(sp, tmp, &doomed, so_lru) { | |
628 | list_del(&sp->so_lru); | |
629 | nfs4_free_state_owner(sp); | |
630 | } | |
1da177e4 LT |
631 | } |
632 | ||
633 | static struct nfs4_state * | |
634 | nfs4_alloc_open_state(void) | |
635 | { | |
636 | struct nfs4_state *state; | |
637 | ||
8535b2be | 638 | state = kzalloc(sizeof(*state), GFP_NOFS); |
1da177e4 LT |
639 | if (!state) |
640 | return NULL; | |
1da177e4 LT |
641 | atomic_set(&state->count, 1); |
642 | INIT_LIST_HEAD(&state->lock_states); | |
8d0a8a9d | 643 | spin_lock_init(&state->state_lock); |
8bda4e4c | 644 | seqlock_init(&state->seqlock); |
1da177e4 LT |
645 | return state; |
646 | } | |
647 | ||
4cecb76f | 648 | void |
dc0b027d | 649 | nfs4_state_set_mode_locked(struct nfs4_state *state, fmode_t fmode) |
4cecb76f | 650 | { |
dc0b027d | 651 | if (state->state == fmode) |
4cecb76f TM |
652 | return; |
653 | /* NB! List reordering - see the reclaim code for why. */ | |
dc0b027d TM |
654 | if ((fmode & FMODE_WRITE) != (state->state & FMODE_WRITE)) { |
655 | if (fmode & FMODE_WRITE) | |
4cecb76f TM |
656 | list_move(&state->open_states, &state->owner->so_states); |
657 | else | |
658 | list_move_tail(&state->open_states, &state->owner->so_states); | |
659 | } | |
dc0b027d | 660 | state->state = fmode; |
4cecb76f TM |
661 | } |
662 | ||
1da177e4 LT |
663 | static struct nfs4_state * |
664 | __nfs4_find_state_byowner(struct inode *inode, struct nfs4_state_owner *owner) | |
665 | { | |
666 | struct nfs_inode *nfsi = NFS_I(inode); | |
667 | struct nfs4_state *state; | |
668 | ||
669 | list_for_each_entry(state, &nfsi->open_states, inode_states) { | |
1c816efa | 670 | if (state->owner != owner) |
1da177e4 | 671 | continue; |
5d422301 TM |
672 | if (!nfs4_valid_open_stateid(state)) |
673 | continue; | |
1c816efa | 674 | if (atomic_inc_not_zero(&state->count)) |
1da177e4 | 675 | return state; |
1da177e4 LT |
676 | } |
677 | return NULL; | |
678 | } | |
679 | ||
1da177e4 LT |
680 | static void |
681 | nfs4_free_open_state(struct nfs4_state *state) | |
682 | { | |
683 | kfree(state); | |
684 | } | |
685 | ||
686 | struct nfs4_state * | |
687 | nfs4_get_open_state(struct inode *inode, struct nfs4_state_owner *owner) | |
688 | { | |
689 | struct nfs4_state *state, *new; | |
690 | struct nfs_inode *nfsi = NFS_I(inode); | |
691 | ||
692 | spin_lock(&inode->i_lock); | |
693 | state = __nfs4_find_state_byowner(inode, owner); | |
694 | spin_unlock(&inode->i_lock); | |
695 | if (state) | |
696 | goto out; | |
697 | new = nfs4_alloc_open_state(); | |
ec073428 | 698 | spin_lock(&owner->so_lock); |
1da177e4 LT |
699 | spin_lock(&inode->i_lock); |
700 | state = __nfs4_find_state_byowner(inode, owner); | |
701 | if (state == NULL && new != NULL) { | |
702 | state = new; | |
1da177e4 LT |
703 | state->owner = owner; |
704 | atomic_inc(&owner->so_count); | |
705 | list_add(&state->inode_states, &nfsi->open_states); | |
0444d76a DC |
706 | ihold(inode); |
707 | state->inode = inode; | |
1da177e4 | 708 | spin_unlock(&inode->i_lock); |
ec073428 TM |
709 | /* Note: The reclaim code dictates that we add stateless |
710 | * and read-only stateids to the end of the list */ | |
711 | list_add_tail(&state->open_states, &owner->so_states); | |
712 | spin_unlock(&owner->so_lock); | |
1da177e4 LT |
713 | } else { |
714 | spin_unlock(&inode->i_lock); | |
ec073428 | 715 | spin_unlock(&owner->so_lock); |
1da177e4 LT |
716 | if (new) |
717 | nfs4_free_open_state(new); | |
718 | } | |
719 | out: | |
720 | return state; | |
721 | } | |
722 | ||
1da177e4 LT |
723 | void nfs4_put_open_state(struct nfs4_state *state) |
724 | { | |
725 | struct inode *inode = state->inode; | |
726 | struct nfs4_state_owner *owner = state->owner; | |
727 | ||
ec073428 | 728 | if (!atomic_dec_and_lock(&state->count, &owner->so_lock)) |
1da177e4 | 729 | return; |
ec073428 | 730 | spin_lock(&inode->i_lock); |
ba683031 | 731 | list_del(&state->inode_states); |
1da177e4 | 732 | list_del(&state->open_states); |
ec073428 TM |
733 | spin_unlock(&inode->i_lock); |
734 | spin_unlock(&owner->so_lock); | |
1da177e4 | 735 | iput(inode); |
1da177e4 LT |
736 | nfs4_free_open_state(state); |
737 | nfs4_put_state_owner(owner); | |
738 | } | |
739 | ||
740 | /* | |
83c9d41e | 741 | * Close the current file. |
1da177e4 | 742 | */ |
643168c2 | 743 | static void __nfs4_close(struct nfs4_state *state, |
8535b2be | 744 | fmode_t fmode, gfp_t gfp_mask, int wait) |
1da177e4 | 745 | { |
1da177e4 | 746 | struct nfs4_state_owner *owner = state->owner; |
003707c7 | 747 | int call_close = 0; |
dc0b027d | 748 | fmode_t newstate; |
1da177e4 LT |
749 | |
750 | atomic_inc(&owner->so_count); | |
1da177e4 | 751 | /* Protect against nfs4_find_state() */ |
ec073428 | 752 | spin_lock(&owner->so_lock); |
dc0b027d | 753 | switch (fmode & (FMODE_READ | FMODE_WRITE)) { |
e7616923 TM |
754 | case FMODE_READ: |
755 | state->n_rdonly--; | |
756 | break; | |
757 | case FMODE_WRITE: | |
758 | state->n_wronly--; | |
759 | break; | |
760 | case FMODE_READ|FMODE_WRITE: | |
761 | state->n_rdwr--; | |
762 | } | |
003707c7 | 763 | newstate = FMODE_READ|FMODE_WRITE; |
e7616923 | 764 | if (state->n_rdwr == 0) { |
003707c7 | 765 | if (state->n_rdonly == 0) { |
e7616923 | 766 | newstate &= ~FMODE_READ; |
003707c7 TM |
767 | call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags); |
768 | call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); | |
769 | } | |
770 | if (state->n_wronly == 0) { | |
e7616923 | 771 | newstate &= ~FMODE_WRITE; |
003707c7 TM |
772 | call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags); |
773 | call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); | |
774 | } | |
775 | if (newstate == 0) | |
776 | clear_bit(NFS_DELEGATED_STATE, &state->flags); | |
e7616923 | 777 | } |
003707c7 | 778 | nfs4_state_set_mode_locked(state, newstate); |
ec073428 | 779 | spin_unlock(&owner->so_lock); |
4cecb76f | 780 | |
003707c7 | 781 | if (!call_close) { |
b39e625b TM |
782 | nfs4_put_open_state(state); |
783 | nfs4_put_state_owner(owner); | |
1f7977c1 TM |
784 | } else |
785 | nfs4_do_close(state, gfp_mask, wait); | |
a49c3c77 TM |
786 | } |
787 | ||
643168c2 | 788 | void nfs4_close_state(struct nfs4_state *state, fmode_t fmode) |
a49c3c77 | 789 | { |
643168c2 | 790 | __nfs4_close(state, fmode, GFP_NOFS, 0); |
a49c3c77 TM |
791 | } |
792 | ||
643168c2 | 793 | void nfs4_close_sync(struct nfs4_state *state, fmode_t fmode) |
a49c3c77 | 794 | { |
643168c2 | 795 | __nfs4_close(state, fmode, GFP_KERNEL, 1); |
1da177e4 LT |
796 | } |
797 | ||
798 | /* | |
799 | * Search the state->lock_states for an existing lock_owner | |
800 | * that is compatible with current->files | |
801 | */ | |
802 | static struct nfs4_lock_state * | |
8003d3c4 | 803 | __nfs4_find_lock_state(struct nfs4_state *state, fl_owner_t fl_owner) |
1da177e4 LT |
804 | { |
805 | struct nfs4_lock_state *pos; | |
806 | list_for_each_entry(pos, &state->lock_states, ls_locks) { | |
8003d3c4 | 807 | if (pos->ls_owner != fl_owner) |
1da177e4 LT |
808 | continue; |
809 | atomic_inc(&pos->ls_count); | |
810 | return pos; | |
811 | } | |
812 | return NULL; | |
813 | } | |
814 | ||
1da177e4 LT |
815 | /* |
816 | * Return a compatible lock_state. If no initialized lock_state structure | |
817 | * exists, return an uninitialized one. | |
818 | * | |
1da177e4 | 819 | */ |
8003d3c4 | 820 | static struct nfs4_lock_state *nfs4_alloc_lock_state(struct nfs4_state *state, fl_owner_t fl_owner) |
1da177e4 LT |
821 | { |
822 | struct nfs4_lock_state *lsp; | |
24d292b8 | 823 | struct nfs_server *server = state->owner->so_server; |
1da177e4 | 824 | |
8535b2be | 825 | lsp = kzalloc(sizeof(*lsp), GFP_NOFS); |
1da177e4 LT |
826 | if (lsp == NULL) |
827 | return NULL; | |
7ba127ab | 828 | nfs4_init_seqid_counter(&lsp->ls_seqid); |
1da177e4 | 829 | atomic_set(&lsp->ls_count, 1); |
b64aec8d | 830 | lsp->ls_state = state; |
8003d3c4 | 831 | lsp->ls_owner = fl_owner; |
48c22eb2 TM |
832 | lsp->ls_seqid.owner_id = ida_simple_get(&server->lockowner_id, 0, 0, GFP_NOFS); |
833 | if (lsp->ls_seqid.owner_id < 0) | |
d2d7ce28 | 834 | goto out_free; |
8d0a8a9d | 835 | INIT_LIST_HEAD(&lsp->ls_locks); |
1da177e4 | 836 | return lsp; |
d2d7ce28 TM |
837 | out_free: |
838 | kfree(lsp); | |
839 | return NULL; | |
1da177e4 LT |
840 | } |
841 | ||
5ae67c4f | 842 | void nfs4_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp) |
9f958ab8 | 843 | { |
48c22eb2 | 844 | ida_simple_remove(&server->lockowner_id, lsp->ls_seqid.owner_id); |
7ba127ab | 845 | nfs4_destroy_seqid_counter(&lsp->ls_seqid); |
9f958ab8 TM |
846 | kfree(lsp); |
847 | } | |
848 | ||
1da177e4 LT |
849 | /* |
850 | * Return a compatible lock_state. If no initialized lock_state structure | |
851 | * exists, return an uninitialized one. | |
852 | * | |
1da177e4 | 853 | */ |
8003d3c4 | 854 | static struct nfs4_lock_state *nfs4_get_lock_state(struct nfs4_state *state, fl_owner_t owner) |
1da177e4 | 855 | { |
8d0a8a9d | 856 | struct nfs4_lock_state *lsp, *new = NULL; |
1da177e4 | 857 | |
8d0a8a9d TM |
858 | for(;;) { |
859 | spin_lock(&state->state_lock); | |
8003d3c4 | 860 | lsp = __nfs4_find_lock_state(state, owner); |
8d0a8a9d TM |
861 | if (lsp != NULL) |
862 | break; | |
863 | if (new != NULL) { | |
8d0a8a9d TM |
864 | list_add(&new->ls_locks, &state->lock_states); |
865 | set_bit(LK_STATE_IN_USE, &state->flags); | |
866 | lsp = new; | |
867 | new = NULL; | |
868 | break; | |
869 | } | |
870 | spin_unlock(&state->state_lock); | |
8003d3c4 | 871 | new = nfs4_alloc_lock_state(state, owner); |
8d0a8a9d TM |
872 | if (new == NULL) |
873 | return NULL; | |
874 | } | |
875 | spin_unlock(&state->state_lock); | |
9f958ab8 | 876 | if (new != NULL) |
5ae67c4f | 877 | nfs4_free_lock_state(state->owner->so_server, new); |
1da177e4 LT |
878 | return lsp; |
879 | } | |
880 | ||
881 | /* | |
8d0a8a9d TM |
882 | * Release reference to lock_state, and free it if we see that |
883 | * it is no longer in use | |
1da177e4 | 884 | */ |
faf5f49c | 885 | void nfs4_put_lock_state(struct nfs4_lock_state *lsp) |
1da177e4 | 886 | { |
c8b2d0bf | 887 | struct nfs_server *server; |
8d0a8a9d | 888 | struct nfs4_state *state; |
1da177e4 | 889 | |
8d0a8a9d TM |
890 | if (lsp == NULL) |
891 | return; | |
892 | state = lsp->ls_state; | |
893 | if (!atomic_dec_and_lock(&lsp->ls_count, &state->state_lock)) | |
894 | return; | |
895 | list_del(&lsp->ls_locks); | |
896 | if (list_empty(&state->lock_states)) | |
897 | clear_bit(LK_STATE_IN_USE, &state->flags); | |
898 | spin_unlock(&state->state_lock); | |
0c0e0d3c JL |
899 | server = state->owner->so_server; |
900 | if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) { | |
901 | struct nfs_client *clp = server->nfs_client; | |
902 | ||
903 | clp->cl_mvops->free_lock_state(server, lsp); | |
904 | } else | |
c8b2d0bf | 905 | nfs4_free_lock_state(server, lsp); |
1da177e4 LT |
906 | } |
907 | ||
8d0a8a9d | 908 | static void nfs4_fl_copy_lock(struct file_lock *dst, struct file_lock *src) |
1da177e4 | 909 | { |
8d0a8a9d | 910 | struct nfs4_lock_state *lsp = src->fl_u.nfs4_fl.owner; |
1da177e4 | 911 | |
8d0a8a9d TM |
912 | dst->fl_u.nfs4_fl.owner = lsp; |
913 | atomic_inc(&lsp->ls_count); | |
914 | } | |
1da177e4 | 915 | |
8d0a8a9d | 916 | static void nfs4_fl_release_lock(struct file_lock *fl) |
1da177e4 | 917 | { |
8d0a8a9d | 918 | nfs4_put_lock_state(fl->fl_u.nfs4_fl.owner); |
1da177e4 LT |
919 | } |
920 | ||
6aed6285 | 921 | static const struct file_lock_operations nfs4_fl_lock_ops = { |
8d0a8a9d TM |
922 | .fl_copy_lock = nfs4_fl_copy_lock, |
923 | .fl_release_private = nfs4_fl_release_lock, | |
924 | }; | |
925 | ||
926 | int nfs4_set_lock_state(struct nfs4_state *state, struct file_lock *fl) | |
1da177e4 | 927 | { |
8d0a8a9d TM |
928 | struct nfs4_lock_state *lsp; |
929 | ||
930 | if (fl->fl_ops != NULL) | |
931 | return 0; | |
8003d3c4 | 932 | lsp = nfs4_get_lock_state(state, fl->fl_owner); |
8d0a8a9d TM |
933 | if (lsp == NULL) |
934 | return -ENOMEM; | |
935 | fl->fl_u.nfs4_fl.owner = lsp; | |
936 | fl->fl_ops = &nfs4_fl_lock_ops; | |
937 | return 0; | |
1da177e4 LT |
938 | } |
939 | ||
5521abfd TM |
940 | static int nfs4_copy_lock_stateid(nfs4_stateid *dst, |
941 | struct nfs4_state *state, | |
2a369153 | 942 | const struct nfs_lockowner *lockowner) |
1da177e4 | 943 | { |
8d0a8a9d | 944 | struct nfs4_lock_state *lsp; |
2a369153 | 945 | fl_owner_t fl_owner; |
5521abfd | 946 | int ret = -ENOENT; |
1da177e4 | 947 | |
2a369153 TM |
948 | |
949 | if (lockowner == NULL) | |
950 | goto out; | |
951 | ||
8d0a8a9d | 952 | if (test_bit(LK_STATE_IN_USE, &state->flags) == 0) |
4fc8796d | 953 | goto out; |
1da177e4 | 954 | |
2a369153 | 955 | fl_owner = lockowner->l_owner; |
8d0a8a9d | 956 | spin_lock(&state->state_lock); |
8003d3c4 | 957 | lsp = __nfs4_find_lock_state(state, fl_owner); |
ef1820f9 N |
958 | if (lsp && test_bit(NFS_LOCK_LOST, &lsp->ls_flags)) |
959 | ret = -EIO; | |
960 | else if (lsp != NULL && test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0) { | |
f597c537 | 961 | nfs4_stateid_copy(dst, &lsp->ls_stateid); |
5521abfd | 962 | ret = 0; |
4fc8796d | 963 | } |
8d0a8a9d | 964 | spin_unlock(&state->state_lock); |
1da177e4 | 965 | nfs4_put_lock_state(lsp); |
4fc8796d TM |
966 | out: |
967 | return ret; | |
968 | } | |
969 | ||
927864cd | 970 | static void nfs4_copy_open_stateid(nfs4_stateid *dst, struct nfs4_state *state) |
4fc8796d | 971 | { |
92b40e93 | 972 | const nfs4_stateid *src; |
4fc8796d TM |
973 | int seq; |
974 | ||
975 | do { | |
92b40e93 | 976 | src = &zero_stateid; |
4fc8796d | 977 | seq = read_seqbegin(&state->seqlock); |
92b40e93 TM |
978 | if (test_bit(NFS_OPEN_STATE, &state->flags)) |
979 | src = &state->open_stateid; | |
980 | nfs4_stateid_copy(dst, src); | |
4fc8796d TM |
981 | } while (read_seqretry(&state->seqlock, seq)); |
982 | } | |
983 | ||
984 | /* | |
985 | * Byte-range lock aware utility to initialize the stateid of read/write | |
986 | * requests. | |
987 | */ | |
abf4e13c TM |
988 | int nfs4_select_rw_stateid(struct nfs4_state *state, |
989 | fmode_t fmode, const struct nfs_lockowner *lockowner, | |
990 | nfs4_stateid *dst, struct rpc_cred **cred) | |
4fc8796d | 991 | { |
abf4e13c TM |
992 | int ret; |
993 | ||
994 | if (cred != NULL) | |
995 | *cred = NULL; | |
996 | ret = nfs4_copy_lock_stateid(dst, state, lockowner); | |
ef1820f9 N |
997 | if (ret == -EIO) |
998 | /* A lost lock - don't even consider delegations */ | |
999 | goto out; | |
146d70ca | 1000 | /* returns true if delegation stateid found and copied */ |
abf4e13c | 1001 | if (nfs4_copy_delegation_stateid(state->inode, fmode, dst, cred)) { |
146d70ca | 1002 | ret = 0; |
5521abfd | 1003 | goto out; |
146d70ca | 1004 | } |
5521abfd | 1005 | if (ret != -ENOENT) |
ef1820f9 N |
1006 | /* nfs4_copy_delegation_stateid() didn't over-write |
1007 | * dst, so it still has the lock stateid which we now | |
1008 | * choose to use. | |
1009 | */ | |
5521abfd | 1010 | goto out; |
927864cd TM |
1011 | nfs4_copy_open_stateid(dst, state); |
1012 | ret = 0; | |
5521abfd | 1013 | out: |
3b66486c TM |
1014 | if (nfs_server_capable(state->inode, NFS_CAP_STATEID_NFSV41)) |
1015 | dst->seqid = 0; | |
5521abfd | 1016 | return ret; |
1da177e4 LT |
1017 | } |
1018 | ||
8535b2be | 1019 | struct nfs_seqid *nfs_alloc_seqid(struct nfs_seqid_counter *counter, gfp_t gfp_mask) |
cee54fc9 | 1020 | { |
cee54fc9 TM |
1021 | struct nfs_seqid *new; |
1022 | ||
8535b2be | 1023 | new = kmalloc(sizeof(*new), gfp_mask); |
badc76dd TM |
1024 | if (new == NULL) |
1025 | return ERR_PTR(-ENOMEM); | |
1026 | new->sequence = counter; | |
1027 | INIT_LIST_HEAD(&new->list); | |
1028 | new->task = NULL; | |
cee54fc9 TM |
1029 | return new; |
1030 | } | |
1031 | ||
72211dbe | 1032 | void nfs_release_seqid(struct nfs_seqid *seqid) |
1da177e4 | 1033 | { |
4601df20 | 1034 | struct nfs_seqid_counter *sequence; |
cee54fc9 | 1035 | |
a6796419 | 1036 | if (seqid == NULL || list_empty(&seqid->list)) |
4601df20 TM |
1037 | return; |
1038 | sequence = seqid->sequence; | |
1039 | spin_lock(&sequence->lock); | |
1040 | list_del_init(&seqid->list); | |
1041 | if (!list_empty(&sequence->list)) { | |
1042 | struct nfs_seqid *next; | |
1043 | ||
1044 | next = list_first_entry(&sequence->list, | |
1045 | struct nfs_seqid, list); | |
1046 | rpc_wake_up_queued_task(&sequence->wait, next->task); | |
2f74c0a0 | 1047 | } |
4601df20 | 1048 | spin_unlock(&sequence->lock); |
72211dbe TM |
1049 | } |
1050 | ||
1051 | void nfs_free_seqid(struct nfs_seqid *seqid) | |
1052 | { | |
1053 | nfs_release_seqid(seqid); | |
cee54fc9 | 1054 | kfree(seqid); |
1da177e4 LT |
1055 | } |
1056 | ||
1057 | /* | |
cee54fc9 TM |
1058 | * Increment the seqid if the OPEN/OPEN_DOWNGRADE/CLOSE succeeded, or |
1059 | * failed with a seqid incrementing error - | |
16a6ddc7 | 1060 | * see comments nfs4.h:seqid_mutating_error() |
cee54fc9 | 1061 | */ |
88d90939 | 1062 | static void nfs_increment_seqid(int status, struct nfs_seqid *seqid) |
cee54fc9 TM |
1063 | { |
1064 | switch (status) { | |
1065 | case 0: | |
1066 | break; | |
1067 | case -NFS4ERR_BAD_SEQID: | |
6f43ddcc TM |
1068 | if (seqid->sequence->flags & NFS_SEQID_CONFIRMED) |
1069 | return; | |
9a3ba432 | 1070 | pr_warn_ratelimited("NFS: v4 server returned a bad" |
497799e7 DM |
1071 | " sequence-id error on an" |
1072 | " unconfirmed sequence %p!\n", | |
6f43ddcc | 1073 | seqid->sequence); |
cee54fc9 TM |
1074 | case -NFS4ERR_STALE_CLIENTID: |
1075 | case -NFS4ERR_STALE_STATEID: | |
1076 | case -NFS4ERR_BAD_STATEID: | |
1077 | case -NFS4ERR_BADXDR: | |
1078 | case -NFS4ERR_RESOURCE: | |
1079 | case -NFS4ERR_NOFILEHANDLE: | |
1080 | /* Non-seqid mutating errors */ | |
1081 | return; | |
1082 | }; | |
1083 | /* | |
1084 | * Note: no locking needed as we are guaranteed to be first | |
1085 | * on the sequence list | |
1086 | */ | |
1087 | seqid->sequence->counter++; | |
1088 | } | |
1089 | ||
1090 | void nfs_increment_open_seqid(int status, struct nfs_seqid *seqid) | |
1091 | { | |
a6796419 TM |
1092 | struct nfs4_state_owner *sp; |
1093 | ||
1094 | if (seqid == NULL) | |
1095 | return; | |
34dc1ad7 | 1096 | |
a6796419 | 1097 | sp = container_of(seqid->sequence, struct nfs4_state_owner, so_seqid); |
34dc1ad7 | 1098 | if (status == -NFS4ERR_BAD_SEQID) |
1da177e4 | 1099 | nfs4_drop_state_owner(sp); |
a6796419 | 1100 | if (!nfs4_has_session(sp->so_server->nfs_client)) |
34dc1ad7 | 1101 | nfs_increment_seqid(status, seqid); |
cee54fc9 TM |
1102 | } |
1103 | ||
1104 | /* | |
cee54fc9 TM |
1105 | * Increment the seqid if the LOCK/LOCKU succeeded, or |
1106 | * failed with a seqid incrementing error - | |
16a6ddc7 | 1107 | * see comments nfs4.h:seqid_mutating_error() |
cee54fc9 TM |
1108 | */ |
1109 | void nfs_increment_lock_seqid(int status, struct nfs_seqid *seqid) | |
1110 | { | |
a6796419 TM |
1111 | if (seqid != NULL) |
1112 | nfs_increment_seqid(status, seqid); | |
cee54fc9 TM |
1113 | } |
1114 | ||
1115 | int nfs_wait_on_sequence(struct nfs_seqid *seqid, struct rpc_task *task) | |
1116 | { | |
a6796419 | 1117 | struct nfs_seqid_counter *sequence; |
cee54fc9 TM |
1118 | int status = 0; |
1119 | ||
a6796419 TM |
1120 | if (seqid == NULL) |
1121 | goto out; | |
1122 | sequence = seqid->sequence; | |
cee54fc9 | 1123 | spin_lock(&sequence->lock); |
4601df20 | 1124 | seqid->task = task; |
2f74c0a0 TM |
1125 | if (list_empty(&seqid->list)) |
1126 | list_add_tail(&seqid->list, &sequence->list); | |
1127 | if (list_first_entry(&sequence->list, struct nfs_seqid, list) == seqid) | |
1128 | goto unlock; | |
5d00837b | 1129 | rpc_sleep_on(&sequence->wait, task, NULL); |
2f74c0a0 TM |
1130 | status = -EAGAIN; |
1131 | unlock: | |
cee54fc9 | 1132 | spin_unlock(&sequence->lock); |
a6796419 | 1133 | out: |
cee54fc9 | 1134 | return status; |
1da177e4 LT |
1135 | } |
1136 | ||
e005e804 | 1137 | static int nfs4_run_state_manager(void *); |
1da177e4 | 1138 | |
e005e804 | 1139 | static void nfs4_clear_state_manager_bit(struct nfs_client *clp) |
433fbe4c | 1140 | { |
4e857c58 | 1141 | smp_mb__before_atomic(); |
e005e804 | 1142 | clear_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state); |
4e857c58 | 1143 | smp_mb__after_atomic(); |
e005e804 | 1144 | wake_up_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING); |
433fbe4c TM |
1145 | rpc_wake_up(&clp->cl_rpcwaitq); |
1146 | } | |
1147 | ||
1da177e4 | 1148 | /* |
e005e804 | 1149 | * Schedule the nfs_client asynchronous state management routine |
1da177e4 | 1150 | */ |
b0d3ded1 | 1151 | void nfs4_schedule_state_manager(struct nfs_client *clp) |
1da177e4 | 1152 | { |
5043e900 | 1153 | struct task_struct *task; |
2446ab60 | 1154 | char buf[INET6_ADDRSTRLEN + sizeof("-manager") + 1]; |
1da177e4 | 1155 | |
e005e804 TM |
1156 | if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) != 0) |
1157 | return; | |
5043e900 TM |
1158 | __module_get(THIS_MODULE); |
1159 | atomic_inc(&clp->cl_count); | |
2446ab60 TM |
1160 | |
1161 | /* The rcu_read_lock() is not strictly necessary, as the state | |
1162 | * manager is the only thread that ever changes the rpc_xprt | |
1163 | * after it's initialized. At this point, we're single threaded. */ | |
1164 | rcu_read_lock(); | |
1165 | snprintf(buf, sizeof(buf), "%s-manager", | |
1166 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)); | |
1167 | rcu_read_unlock(); | |
f170168b | 1168 | task = kthread_run(nfs4_run_state_manager, clp, "%s", buf); |
2446ab60 TM |
1169 | if (IS_ERR(task)) { |
1170 | printk(KERN_ERR "%s: kthread_run: %ld\n", | |
1171 | __func__, PTR_ERR(task)); | |
1172 | nfs4_clear_state_manager_bit(clp); | |
1173 | nfs_put_client(clp); | |
1174 | module_put(THIS_MODULE); | |
1175 | } | |
1da177e4 LT |
1176 | } |
1177 | ||
1178 | /* | |
0400a6b0 | 1179 | * Schedule a lease recovery attempt |
1da177e4 | 1180 | */ |
0400a6b0 | 1181 | void nfs4_schedule_lease_recovery(struct nfs_client *clp) |
1da177e4 LT |
1182 | { |
1183 | if (!clp) | |
1184 | return; | |
e598d843 TM |
1185 | if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
1186 | set_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); | |
cc0a9843 TM |
1187 | dprintk("%s: scheduling lease recovery for server %s\n", __func__, |
1188 | clp->cl_hostname); | |
e005e804 | 1189 | nfs4_schedule_state_manager(clp); |
1da177e4 | 1190 | } |
9cb81968 | 1191 | EXPORT_SYMBOL_GPL(nfs4_schedule_lease_recovery); |
1da177e4 | 1192 | |
c9fdeb28 CL |
1193 | /** |
1194 | * nfs4_schedule_migration_recovery - trigger migration recovery | |
1195 | * | |
1196 | * @server: FSID that is migrating | |
1197 | * | |
1198 | * Returns zero if recovery has started, otherwise a negative NFS4ERR | |
1199 | * value is returned. | |
1200 | */ | |
1201 | int nfs4_schedule_migration_recovery(const struct nfs_server *server) | |
1202 | { | |
1203 | struct nfs_client *clp = server->nfs_client; | |
1204 | ||
1205 | if (server->fh_expire_type != NFS4_FH_PERSISTENT) { | |
1206 | pr_err("NFS: volatile file handles not supported (server %s)\n", | |
1207 | clp->cl_hostname); | |
1208 | return -NFS4ERR_IO; | |
1209 | } | |
1210 | ||
1211 | if (test_bit(NFS_MIG_FAILED, &server->mig_status)) | |
1212 | return -NFS4ERR_IO; | |
1213 | ||
1214 | dprintk("%s: scheduling migration recovery for (%llx:%llx) on %s\n", | |
1215 | __func__, | |
1216 | (unsigned long long)server->fsid.major, | |
1217 | (unsigned long long)server->fsid.minor, | |
1218 | clp->cl_hostname); | |
1219 | ||
1220 | set_bit(NFS_MIG_IN_TRANSITION, | |
1221 | &((struct nfs_server *)server)->mig_status); | |
1222 | set_bit(NFS4CLNT_MOVED, &clp->cl_state); | |
1223 | ||
1224 | nfs4_schedule_state_manager(clp); | |
1225 | return 0; | |
1226 | } | |
1227 | EXPORT_SYMBOL_GPL(nfs4_schedule_migration_recovery); | |
1228 | ||
b7f7a66e CL |
1229 | /** |
1230 | * nfs4_schedule_lease_moved_recovery - start lease-moved recovery | |
1231 | * | |
1232 | * @clp: server to check for moved leases | |
1233 | * | |
1234 | */ | |
1235 | void nfs4_schedule_lease_moved_recovery(struct nfs_client *clp) | |
1236 | { | |
1237 | dprintk("%s: scheduling lease-moved recovery for client ID %llx on %s\n", | |
1238 | __func__, clp->cl_clientid, clp->cl_hostname); | |
1239 | ||
1240 | set_bit(NFS4CLNT_LEASE_MOVED, &clp->cl_state); | |
1241 | nfs4_schedule_state_manager(clp); | |
1242 | } | |
1243 | EXPORT_SYMBOL_GPL(nfs4_schedule_lease_moved_recovery); | |
1244 | ||
33021279 TM |
1245 | int nfs4_wait_clnt_recover(struct nfs_client *clp) |
1246 | { | |
1247 | int res; | |
1248 | ||
1249 | might_sleep(); | |
1250 | ||
0625c2dd | 1251 | atomic_inc(&clp->cl_count); |
74316201 N |
1252 | res = wait_on_bit_action(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING, |
1253 | nfs_wait_bit_killable, TASK_KILLABLE); | |
33021279 | 1254 | if (res) |
0625c2dd | 1255 | goto out; |
33021279 | 1256 | if (clp->cl_cons_state < 0) |
0625c2dd CL |
1257 | res = clp->cl_cons_state; |
1258 | out: | |
1259 | nfs_put_client(clp); | |
1260 | return res; | |
33021279 TM |
1261 | } |
1262 | ||
1263 | int nfs4_client_recover_expired_lease(struct nfs_client *clp) | |
1264 | { | |
1265 | unsigned int loop; | |
1266 | int ret; | |
1267 | ||
1268 | for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) { | |
1269 | ret = nfs4_wait_clnt_recover(clp); | |
1270 | if (ret != 0) | |
1271 | break; | |
1272 | if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) && | |
1273 | !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state)) | |
1274 | break; | |
1275 | nfs4_schedule_state_manager(clp); | |
1276 | ret = -EIO; | |
1277 | } | |
1278 | return ret; | |
1279 | } | |
1280 | ||
ad1e3968 TM |
1281 | /* |
1282 | * nfs40_handle_cb_pathdown - return all delegations after NFS4ERR_CB_PATH_DOWN | |
1283 | * @clp: client to process | |
1284 | * | |
1285 | * Set the NFS4CLNT_LEASE_EXPIRED state in order to force a | |
1286 | * resend of the SETCLIENTID and hence re-establish the | |
1287 | * callback channel. Then return all existing delegations. | |
1288 | */ | |
1289 | static void nfs40_handle_cb_pathdown(struct nfs_client *clp) | |
1290 | { | |
1291 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1292 | nfs_expire_all_delegations(clp); | |
cc0a9843 TM |
1293 | dprintk("%s: handling CB_PATHDOWN recovery for server %s\n", __func__, |
1294 | clp->cl_hostname); | |
ad1e3968 TM |
1295 | } |
1296 | ||
042b60be TM |
1297 | void nfs4_schedule_path_down_recovery(struct nfs_client *clp) |
1298 | { | |
ad1e3968 | 1299 | nfs40_handle_cb_pathdown(clp); |
042b60be TM |
1300 | nfs4_schedule_state_manager(clp); |
1301 | } | |
1302 | ||
f9feab1e | 1303 | static int nfs4_state_mark_reclaim_reboot(struct nfs_client *clp, struct nfs4_state *state) |
b79a4a1b TM |
1304 | { |
1305 | ||
1306 | set_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); | |
1307 | /* Don't recover state that expired before the reboot */ | |
1308 | if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) { | |
1309 | clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); | |
1310 | return 0; | |
1311 | } | |
7eff03ae | 1312 | set_bit(NFS_OWNER_RECLAIM_REBOOT, &state->owner->so_flags); |
b79a4a1b TM |
1313 | set_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state); |
1314 | return 1; | |
1315 | } | |
1316 | ||
4f14c194 | 1317 | int nfs4_state_mark_reclaim_nograce(struct nfs_client *clp, struct nfs4_state *state) |
b79a4a1b TM |
1318 | { |
1319 | set_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags); | |
1320 | clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); | |
7eff03ae | 1321 | set_bit(NFS_OWNER_RECLAIM_NOGRACE, &state->owner->so_flags); |
b79a4a1b TM |
1322 | set_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state); |
1323 | return 1; | |
1324 | } | |
1325 | ||
5d422301 | 1326 | int nfs4_schedule_stateid_recovery(const struct nfs_server *server, struct nfs4_state *state) |
0400a6b0 TM |
1327 | { |
1328 | struct nfs_client *clp = server->nfs_client; | |
1329 | ||
5d422301 TM |
1330 | if (!nfs4_valid_open_stateid(state)) |
1331 | return -EBADF; | |
0400a6b0 | 1332 | nfs4_state_mark_reclaim_nograce(clp, state); |
cc0a9843 TM |
1333 | dprintk("%s: scheduling stateid recovery for server %s\n", __func__, |
1334 | clp->cl_hostname); | |
0400a6b0 | 1335 | nfs4_schedule_state_manager(clp); |
5d422301 | 1336 | return 0; |
0400a6b0 | 1337 | } |
9cb81968 | 1338 | EXPORT_SYMBOL_GPL(nfs4_schedule_stateid_recovery); |
0400a6b0 | 1339 | |
a1d0b5ee TM |
1340 | void nfs_inode_find_state_and_recover(struct inode *inode, |
1341 | const nfs4_stateid *stateid) | |
1342 | { | |
1343 | struct nfs_client *clp = NFS_SERVER(inode)->nfs_client; | |
1344 | struct nfs_inode *nfsi = NFS_I(inode); | |
1345 | struct nfs_open_context *ctx; | |
1346 | struct nfs4_state *state; | |
1347 | bool found = false; | |
1348 | ||
1349 | spin_lock(&inode->i_lock); | |
1350 | list_for_each_entry(ctx, &nfsi->open_files, list) { | |
1351 | state = ctx->state; | |
1352 | if (state == NULL) | |
1353 | continue; | |
1354 | if (!test_bit(NFS_DELEGATED_STATE, &state->flags)) | |
1355 | continue; | |
f597c537 | 1356 | if (!nfs4_stateid_match(&state->stateid, stateid)) |
a1d0b5ee TM |
1357 | continue; |
1358 | nfs4_state_mark_reclaim_nograce(clp, state); | |
1359 | found = true; | |
1360 | } | |
1361 | spin_unlock(&inode->i_lock); | |
1362 | if (found) | |
1363 | nfs4_schedule_state_manager(clp); | |
1364 | } | |
1365 | ||
c58c8441 TM |
1366 | static void nfs4_state_mark_open_context_bad(struct nfs4_state *state) |
1367 | { | |
1368 | struct inode *inode = state->inode; | |
1369 | struct nfs_inode *nfsi = NFS_I(inode); | |
1370 | struct nfs_open_context *ctx; | |
1371 | ||
1372 | spin_lock(&inode->i_lock); | |
1373 | list_for_each_entry(ctx, &nfsi->open_files, list) { | |
1374 | if (ctx->state != state) | |
1375 | continue; | |
1376 | set_bit(NFS_CONTEXT_BAD, &ctx->flags); | |
1377 | } | |
1378 | spin_unlock(&inode->i_lock); | |
1379 | } | |
1380 | ||
5d422301 TM |
1381 | static void nfs4_state_mark_recovery_failed(struct nfs4_state *state, int error) |
1382 | { | |
1383 | set_bit(NFS_STATE_RECOVERY_FAILED, &state->flags); | |
c58c8441 | 1384 | nfs4_state_mark_open_context_bad(state); |
5d422301 TM |
1385 | } |
1386 | ||
a1d0b5ee | 1387 | |
02860014 | 1388 | static int nfs4_reclaim_locks(struct nfs4_state *state, const struct nfs4_state_recovery_ops *ops) |
1da177e4 LT |
1389 | { |
1390 | struct inode *inode = state->inode; | |
19e03c57 | 1391 | struct nfs_inode *nfsi = NFS_I(inode); |
1da177e4 LT |
1392 | struct file_lock *fl; |
1393 | int status = 0; | |
5263e31e | 1394 | struct file_lock_context *flctx = inode->i_flctx; |
bd61e0a9 | 1395 | struct list_head *list; |
1da177e4 | 1396 | |
bd61e0a9 | 1397 | if (flctx == NULL) |
3f09df70 TM |
1398 | return 0; |
1399 | ||
bd61e0a9 JL |
1400 | list = &flctx->flc_posix; |
1401 | ||
3f09df70 | 1402 | /* Guard against delegation returns and new lock/unlock calls */ |
19e03c57 | 1403 | down_write(&nfsi->rwsem); |
6109c850 | 1404 | spin_lock(&flctx->flc_lock); |
bd61e0a9 JL |
1405 | restart: |
1406 | list_for_each_entry(fl, list, fl_list) { | |
5263e31e JL |
1407 | if (nfs_file_open_context(fl->fl_file)->state != state) |
1408 | continue; | |
6109c850 | 1409 | spin_unlock(&flctx->flc_lock); |
5263e31e JL |
1410 | status = ops->recover_lock(state, fl); |
1411 | switch (status) { | |
1412 | case 0: | |
1413 | break; | |
1414 | case -ESTALE: | |
1415 | case -NFS4ERR_ADMIN_REVOKED: | |
1416 | case -NFS4ERR_STALE_STATEID: | |
1417 | case -NFS4ERR_BAD_STATEID: | |
1418 | case -NFS4ERR_EXPIRED: | |
1419 | case -NFS4ERR_NO_GRACE: | |
1420 | case -NFS4ERR_STALE_CLIENTID: | |
1421 | case -NFS4ERR_BADSESSION: | |
1422 | case -NFS4ERR_BADSLOT: | |
1423 | case -NFS4ERR_BAD_HIGH_SLOT: | |
1424 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
1425 | goto out; | |
1426 | default: | |
1427 | pr_err("NFS: %s: unhandled error %d\n", | |
1428 | __func__, status); | |
1429 | case -ENOMEM: | |
1430 | case -NFS4ERR_DENIED: | |
1431 | case -NFS4ERR_RECLAIM_BAD: | |
1432 | case -NFS4ERR_RECLAIM_CONFLICT: | |
1433 | /* kill_proc(fl->fl_pid, SIGLOST, 1); */ | |
1434 | status = 0; | |
1435 | } | |
6109c850 | 1436 | spin_lock(&flctx->flc_lock); |
5263e31e | 1437 | } |
bd61e0a9 JL |
1438 | if (list == &flctx->flc_posix) { |
1439 | list = &flctx->flc_flock; | |
1440 | goto restart; | |
1441 | } | |
6109c850 | 1442 | spin_unlock(&flctx->flc_lock); |
965b5d67 | 1443 | out: |
19e03c57 | 1444 | up_write(&nfsi->rwsem); |
1da177e4 LT |
1445 | return status; |
1446 | } | |
1447 | ||
02860014 | 1448 | static int nfs4_reclaim_open_state(struct nfs4_state_owner *sp, const struct nfs4_state_recovery_ops *ops) |
1da177e4 LT |
1449 | { |
1450 | struct nfs4_state *state; | |
1451 | struct nfs4_lock_state *lock; | |
1452 | int status = 0; | |
1453 | ||
1454 | /* Note: we rely on the sp->so_states list being ordered | |
1455 | * so that we always reclaim open(O_RDWR) and/or open(O_WRITE) | |
1456 | * states first. | |
1457 | * This is needed to ensure that the server won't give us any | |
1458 | * read delegations that we have to return if, say, we are | |
1459 | * recovering after a network partition or a reboot from a | |
1460 | * server that doesn't support a grace period. | |
1461 | */ | |
fe1d8195 | 1462 | spin_lock(&sp->so_lock); |
abbec2da | 1463 | raw_write_seqcount_begin(&sp->so_reclaim_seqcount); |
c137afab | 1464 | restart: |
1da177e4 | 1465 | list_for_each_entry(state, &sp->so_states, open_states) { |
b79a4a1b TM |
1466 | if (!test_and_clear_bit(ops->state_flag_bit, &state->flags)) |
1467 | continue; | |
5d422301 TM |
1468 | if (!nfs4_valid_open_stateid(state)) |
1469 | continue; | |
1da177e4 LT |
1470 | if (state->state == 0) |
1471 | continue; | |
fe1d8195 TM |
1472 | atomic_inc(&state->count); |
1473 | spin_unlock(&sp->so_lock); | |
1da177e4 | 1474 | status = ops->recover_open(sp, state); |
1da177e4 | 1475 | if (status >= 0) { |
02860014 TM |
1476 | status = nfs4_reclaim_locks(state, ops); |
1477 | if (status >= 0) { | |
1acd1c30 | 1478 | if (!test_bit(NFS_DELEGATED_STATE, &state->flags)) { |
6686390b N |
1479 | spin_lock(&state->state_lock); |
1480 | list_for_each_entry(lock, &state->lock_states, ls_locks) { | |
1481 | if (!test_bit(NFS_LOCK_INITIALIZED, &lock->ls_flags)) | |
1482 | pr_warn_ratelimited("NFS: " | |
1483 | "%s: Lock reclaim " | |
1484 | "failed!\n", __func__); | |
1485 | } | |
1486 | spin_unlock(&state->state_lock); | |
02860014 | 1487 | } |
a41cbe86 | 1488 | clear_bit(NFS_STATE_RECLAIM_NOGRACE, |
e8d975e7 | 1489 | &state->flags); |
cea7f829 | 1490 | nfs4_put_open_state(state); |
c137afab | 1491 | spin_lock(&sp->so_lock); |
fe1d8195 | 1492 | goto restart; |
1da177e4 | 1493 | } |
1da177e4 LT |
1494 | } |
1495 | switch (status) { | |
1496 | default: | |
3660cd43 AA |
1497 | printk(KERN_ERR "NFS: %s: unhandled error %d\n", |
1498 | __func__, status); | |
1da177e4 | 1499 | case -ENOENT: |
965b5d67 | 1500 | case -ENOMEM: |
b79a4a1b | 1501 | case -ESTALE: |
3660cd43 | 1502 | /* Open state on this file cannot be recovered */ |
5d422301 | 1503 | nfs4_state_mark_recovery_failed(state, status); |
1da177e4 | 1504 | break; |
91876b13 TM |
1505 | case -EAGAIN: |
1506 | ssleep(1); | |
965b5d67 TM |
1507 | case -NFS4ERR_ADMIN_REVOKED: |
1508 | case -NFS4ERR_STALE_STATEID: | |
1509 | case -NFS4ERR_BAD_STATEID: | |
b79a4a1b TM |
1510 | case -NFS4ERR_RECLAIM_BAD: |
1511 | case -NFS4ERR_RECLAIM_CONFLICT: | |
1f0e890d | 1512 | nfs4_state_mark_reclaim_nograce(sp->so_server->nfs_client, state); |
b79a4a1b | 1513 | break; |
1da177e4 LT |
1514 | case -NFS4ERR_EXPIRED: |
1515 | case -NFS4ERR_NO_GRACE: | |
1f0e890d | 1516 | nfs4_state_mark_reclaim_nograce(sp->so_server->nfs_client, state); |
1da177e4 | 1517 | case -NFS4ERR_STALE_CLIENTID: |
9c4c761a TM |
1518 | case -NFS4ERR_BADSESSION: |
1519 | case -NFS4ERR_BADSLOT: | |
1520 | case -NFS4ERR_BAD_HIGH_SLOT: | |
1521 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
1da177e4 LT |
1522 | goto out_err; |
1523 | } | |
fe1d8195 | 1524 | nfs4_put_open_state(state); |
c137afab | 1525 | spin_lock(&sp->so_lock); |
fe1d8195 | 1526 | goto restart; |
1da177e4 | 1527 | } |
abbec2da | 1528 | raw_write_seqcount_end(&sp->so_reclaim_seqcount); |
fe1d8195 | 1529 | spin_unlock(&sp->so_lock); |
1da177e4 LT |
1530 | return 0; |
1531 | out_err: | |
fe1d8195 | 1532 | nfs4_put_open_state(state); |
c137afab | 1533 | spin_lock(&sp->so_lock); |
abbec2da | 1534 | raw_write_seqcount_end(&sp->so_reclaim_seqcount); |
c137afab | 1535 | spin_unlock(&sp->so_lock); |
1da177e4 LT |
1536 | return status; |
1537 | } | |
1538 | ||
b79a4a1b TM |
1539 | static void nfs4_clear_open_state(struct nfs4_state *state) |
1540 | { | |
1541 | struct nfs4_lock_state *lock; | |
1542 | ||
1543 | clear_bit(NFS_DELEGATED_STATE, &state->flags); | |
1544 | clear_bit(NFS_O_RDONLY_STATE, &state->flags); | |
1545 | clear_bit(NFS_O_WRONLY_STATE, &state->flags); | |
1546 | clear_bit(NFS_O_RDWR_STATE, &state->flags); | |
4b44b40e | 1547 | spin_lock(&state->state_lock); |
b79a4a1b | 1548 | list_for_each_entry(lock, &state->lock_states, ls_locks) { |
b79a4a1b | 1549 | lock->ls_seqid.flags = 0; |
795a88c9 | 1550 | clear_bit(NFS_LOCK_INITIALIZED, &lock->ls_flags); |
b79a4a1b | 1551 | } |
4b44b40e | 1552 | spin_unlock(&state->state_lock); |
b79a4a1b TM |
1553 | } |
1554 | ||
24d292b8 CL |
1555 | static void nfs4_reset_seqids(struct nfs_server *server, |
1556 | int (*mark_reclaim)(struct nfs_client *clp, struct nfs4_state *state)) | |
cee54fc9 | 1557 | { |
24d292b8 | 1558 | struct nfs_client *clp = server->nfs_client; |
cee54fc9 | 1559 | struct nfs4_state_owner *sp; |
9f958ab8 | 1560 | struct rb_node *pos; |
cee54fc9 | 1561 | struct nfs4_state *state; |
cee54fc9 | 1562 | |
24d292b8 CL |
1563 | spin_lock(&clp->cl_lock); |
1564 | for (pos = rb_first(&server->state_owners); | |
1565 | pos != NULL; | |
1566 | pos = rb_next(pos)) { | |
1567 | sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); | |
cee54fc9 | 1568 | sp->so_seqid.flags = 0; |
ec073428 | 1569 | spin_lock(&sp->so_lock); |
cee54fc9 | 1570 | list_for_each_entry(state, &sp->so_states, open_states) { |
b79a4a1b TM |
1571 | if (mark_reclaim(clp, state)) |
1572 | nfs4_clear_open_state(state); | |
cee54fc9 | 1573 | } |
ec073428 | 1574 | spin_unlock(&sp->so_lock); |
cee54fc9 | 1575 | } |
24d292b8 CL |
1576 | spin_unlock(&clp->cl_lock); |
1577 | } | |
1578 | ||
1579 | static void nfs4_state_mark_reclaim_helper(struct nfs_client *clp, | |
1580 | int (*mark_reclaim)(struct nfs_client *clp, struct nfs4_state *state)) | |
1581 | { | |
1582 | struct nfs_server *server; | |
1583 | ||
1584 | rcu_read_lock(); | |
1585 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) | |
1586 | nfs4_reset_seqids(server, mark_reclaim); | |
1587 | rcu_read_unlock(); | |
cee54fc9 TM |
1588 | } |
1589 | ||
b79a4a1b TM |
1590 | static void nfs4_state_start_reclaim_reboot(struct nfs_client *clp) |
1591 | { | |
1592 | /* Mark all delegations for reclaim */ | |
1593 | nfs_delegation_mark_reclaim(clp); | |
1594 | nfs4_state_mark_reclaim_helper(clp, nfs4_state_mark_reclaim_reboot); | |
1595 | } | |
1596 | ||
fce5c838 | 1597 | static void nfs4_reclaim_complete(struct nfs_client *clp, |
965e9c23 TM |
1598 | const struct nfs4_state_recovery_ops *ops, |
1599 | struct rpc_cred *cred) | |
fce5c838 RL |
1600 | { |
1601 | /* Notify the server we're done reclaiming our state */ | |
1602 | if (ops->reclaim_complete) | |
965e9c23 | 1603 | (void)ops->reclaim_complete(clp, cred); |
fce5c838 RL |
1604 | } |
1605 | ||
24d292b8 | 1606 | static void nfs4_clear_reclaim_server(struct nfs_server *server) |
b79a4a1b | 1607 | { |
24d292b8 | 1608 | struct nfs_client *clp = server->nfs_client; |
b79a4a1b TM |
1609 | struct nfs4_state_owner *sp; |
1610 | struct rb_node *pos; | |
1611 | struct nfs4_state *state; | |
1612 | ||
24d292b8 CL |
1613 | spin_lock(&clp->cl_lock); |
1614 | for (pos = rb_first(&server->state_owners); | |
1615 | pos != NULL; | |
1616 | pos = rb_next(pos)) { | |
1617 | sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); | |
b79a4a1b TM |
1618 | spin_lock(&sp->so_lock); |
1619 | list_for_each_entry(state, &sp->so_states, open_states) { | |
24d292b8 CL |
1620 | if (!test_and_clear_bit(NFS_STATE_RECLAIM_REBOOT, |
1621 | &state->flags)) | |
b79a4a1b TM |
1622 | continue; |
1623 | nfs4_state_mark_reclaim_nograce(clp, state); | |
1624 | } | |
1625 | spin_unlock(&sp->so_lock); | |
1626 | } | |
24d292b8 CL |
1627 | spin_unlock(&clp->cl_lock); |
1628 | } | |
1629 | ||
1630 | static int nfs4_state_clear_reclaim_reboot(struct nfs_client *clp) | |
1631 | { | |
1632 | struct nfs_server *server; | |
1633 | ||
1634 | if (!test_and_clear_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) | |
1635 | return 0; | |
1636 | ||
1637 | rcu_read_lock(); | |
1638 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) | |
1639 | nfs4_clear_reclaim_server(server); | |
1640 | rcu_read_unlock(); | |
b79a4a1b TM |
1641 | |
1642 | nfs_delegation_reap_unclaimed(clp); | |
6eaa6149 TM |
1643 | return 1; |
1644 | } | |
1645 | ||
1646 | static void nfs4_state_end_reclaim_reboot(struct nfs_client *clp) | |
1647 | { | |
965e9c23 TM |
1648 | const struct nfs4_state_recovery_ops *ops; |
1649 | struct rpc_cred *cred; | |
1650 | ||
6eaa6149 TM |
1651 | if (!nfs4_state_clear_reclaim_reboot(clp)) |
1652 | return; | |
965e9c23 | 1653 | ops = clp->cl_mvops->reboot_recovery_ops; |
73d8bde5 | 1654 | cred = nfs4_get_clid_cred(clp); |
965e9c23 TM |
1655 | nfs4_reclaim_complete(clp, ops, cred); |
1656 | put_rpccred(cred); | |
b79a4a1b TM |
1657 | } |
1658 | ||
1659 | static void nfs_delegation_clear_all(struct nfs_client *clp) | |
1660 | { | |
1661 | nfs_delegation_mark_reclaim(clp); | |
1662 | nfs_delegation_reap_unclaimed(clp); | |
1663 | } | |
1664 | ||
1665 | static void nfs4_state_start_reclaim_nograce(struct nfs_client *clp) | |
1666 | { | |
1667 | nfs_delegation_clear_all(clp); | |
1668 | nfs4_state_mark_reclaim_helper(clp, nfs4_state_mark_reclaim_nograce); | |
1669 | } | |
1670 | ||
4f7cdf18 | 1671 | static int nfs4_recovery_handle_error(struct nfs_client *clp, int error) |
e598d843 TM |
1672 | { |
1673 | switch (error) { | |
4f38e4aa TM |
1674 | case 0: |
1675 | break; | |
e598d843 | 1676 | case -NFS4ERR_CB_PATH_DOWN: |
ad1e3968 | 1677 | nfs40_handle_cb_pathdown(clp); |
4f38e4aa | 1678 | break; |
c8b7ae3d TM |
1679 | case -NFS4ERR_NO_GRACE: |
1680 | nfs4_state_end_reclaim_reboot(clp); | |
4f38e4aa | 1681 | break; |
e598d843 | 1682 | case -NFS4ERR_STALE_CLIENTID: |
e598d843 | 1683 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); |
6eaa6149 | 1684 | nfs4_state_clear_reclaim_reboot(clp); |
e598d843 TM |
1685 | nfs4_state_start_reclaim_reboot(clp); |
1686 | break; | |
1687 | case -NFS4ERR_EXPIRED: | |
1688 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1689 | nfs4_state_start_reclaim_nograce(clp); | |
8ba9bf8e | 1690 | break; |
c3fad1b1 AA |
1691 | case -NFS4ERR_BADSESSION: |
1692 | case -NFS4ERR_BADSLOT: | |
1693 | case -NFS4ERR_BAD_HIGH_SLOT: | |
1694 | case -NFS4ERR_DEADSESSION: | |
c3fad1b1 AA |
1695 | case -NFS4ERR_SEQ_FALSE_RETRY: |
1696 | case -NFS4ERR_SEQ_MISORDERED: | |
6df08189 | 1697 | set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); |
0b9e2d41 | 1698 | /* Zero session reset errors */ |
4f38e4aa | 1699 | break; |
7c5d7256 TM |
1700 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: |
1701 | set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); | |
1702 | break; | |
4f38e4aa | 1703 | default: |
cc0a9843 TM |
1704 | dprintk("%s: failed to handle error %d for server %s\n", |
1705 | __func__, error, clp->cl_hostname); | |
4f38e4aa | 1706 | return error; |
e598d843 | 1707 | } |
cc0a9843 TM |
1708 | dprintk("%s: handled error %d for server %s\n", __func__, error, |
1709 | clp->cl_hostname); | |
4f38e4aa | 1710 | return 0; |
e598d843 TM |
1711 | } |
1712 | ||
02860014 | 1713 | static int nfs4_do_reclaim(struct nfs_client *clp, const struct nfs4_state_recovery_ops *ops) |
1da177e4 | 1714 | { |
24d292b8 CL |
1715 | struct nfs4_state_owner *sp; |
1716 | struct nfs_server *server; | |
9f958ab8 | 1717 | struct rb_node *pos; |
1da177e4 LT |
1718 | int status = 0; |
1719 | ||
7eff03ae | 1720 | restart: |
24d292b8 CL |
1721 | rcu_read_lock(); |
1722 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { | |
0aaaf5c4 | 1723 | nfs4_purge_state_owners(server); |
24d292b8 CL |
1724 | spin_lock(&clp->cl_lock); |
1725 | for (pos = rb_first(&server->state_owners); | |
1726 | pos != NULL; | |
1727 | pos = rb_next(pos)) { | |
1728 | sp = rb_entry(pos, | |
1729 | struct nfs4_state_owner, so_server_node); | |
1730 | if (!test_and_clear_bit(ops->owner_flag_bit, | |
1731 | &sp->so_flags)) | |
1732 | continue; | |
4a0954ef TM |
1733 | if (!atomic_inc_not_zero(&sp->so_count)) |
1734 | continue; | |
24d292b8 CL |
1735 | spin_unlock(&clp->cl_lock); |
1736 | rcu_read_unlock(); | |
1737 | ||
1738 | status = nfs4_reclaim_open_state(sp, ops); | |
1739 | if (status < 0) { | |
1740 | set_bit(ops->owner_flag_bit, &sp->so_flags); | |
1741 | nfs4_put_state_owner(sp); | |
df817ba3 TM |
1742 | status = nfs4_recovery_handle_error(clp, status); |
1743 | return (status != 0) ? status : -EAGAIN; | |
24d292b8 CL |
1744 | } |
1745 | ||
7eff03ae | 1746 | nfs4_put_state_owner(sp); |
24d292b8 | 1747 | goto restart; |
7eff03ae | 1748 | } |
24d292b8 | 1749 | spin_unlock(&clp->cl_lock); |
02860014 | 1750 | } |
24d292b8 | 1751 | rcu_read_unlock(); |
df817ba3 | 1752 | return 0; |
02860014 TM |
1753 | } |
1754 | ||
1755 | static int nfs4_check_lease(struct nfs_client *clp) | |
1756 | { | |
1757 | struct rpc_cred *cred; | |
c48f4f35 TM |
1758 | const struct nfs4_state_maintenance_ops *ops = |
1759 | clp->cl_mvops->state_renewal_ops; | |
4f38e4aa | 1760 | int status; |
1da177e4 | 1761 | |
0f605b56 TM |
1762 | /* Is the client already known to have an expired lease? */ |
1763 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) | |
1764 | return 0; | |
a7b72103 AA |
1765 | spin_lock(&clp->cl_lock); |
1766 | cred = ops->get_state_renewal_cred_locked(clp); | |
1767 | spin_unlock(&clp->cl_lock); | |
0f605b56 | 1768 | if (cred == NULL) { |
73d8bde5 | 1769 | cred = nfs4_get_clid_cred(clp); |
4f38e4aa | 1770 | status = -ENOKEY; |
0f605b56 TM |
1771 | if (cred == NULL) |
1772 | goto out; | |
286d7d6a | 1773 | } |
8e69514f | 1774 | status = ops->renew_lease(clp, cred); |
0f605b56 | 1775 | put_rpccred(cred); |
bc7a05ca TM |
1776 | if (status == -ETIMEDOUT) { |
1777 | set_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); | |
1778 | return 0; | |
1779 | } | |
0f605b56 | 1780 | out: |
4f7cdf18 | 1781 | return nfs4_recovery_handle_error(clp, status); |
02860014 TM |
1782 | } |
1783 | ||
47b803c8 AA |
1784 | /* Set NFS4CLNT_LEASE_EXPIRED and reclaim reboot state for all v4.0 errors |
1785 | * and for recoverable errors on EXCHANGE_ID for v4.1 | |
2a6ee6aa TM |
1786 | */ |
1787 | static int nfs4_handle_reclaim_lease_error(struct nfs_client *clp, int status) | |
1788 | { | |
1789 | switch (status) { | |
89a21736 TM |
1790 | case -NFS4ERR_SEQ_MISORDERED: |
1791 | if (test_and_set_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) | |
1792 | return -ESERVERFAULT; | |
1793 | /* Lease confirmation error: retry after purging the lease */ | |
1794 | ssleep(1); | |
47b803c8 AA |
1795 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
1796 | break; | |
2a6ee6aa TM |
1797 | case -NFS4ERR_STALE_CLIENTID: |
1798 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); | |
47b803c8 | 1799 | nfs4_state_start_reclaim_reboot(clp); |
2a6ee6aa | 1800 | break; |
de734831 CL |
1801 | case -NFS4ERR_CLID_INUSE: |
1802 | pr_err("NFS: Server %s reports our clientid is in use\n", | |
1803 | clp->cl_hostname); | |
1804 | nfs_mark_client_ready(clp, -EPERM); | |
1805 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); | |
1806 | return -EPERM; | |
2a6ee6aa | 1807 | case -EACCES: |
2a6ee6aa TM |
1808 | case -NFS4ERR_DELAY: |
1809 | case -ETIMEDOUT: | |
1810 | case -EAGAIN: | |
1811 | ssleep(1); | |
1812 | break; | |
1813 | ||
1814 | case -NFS4ERR_MINOR_VERS_MISMATCH: | |
1815 | if (clp->cl_cons_state == NFS_CS_SESSION_INITING) | |
1816 | nfs_mark_client_ready(clp, -EPROTONOSUPPORT); | |
cc0a9843 TM |
1817 | dprintk("%s: exit with error %d for server %s\n", |
1818 | __func__, -EPROTONOSUPPORT, clp->cl_hostname); | |
2a6ee6aa | 1819 | return -EPROTONOSUPPORT; |
2a6ee6aa TM |
1820 | case -NFS4ERR_NOT_SAME: /* FixMe: implement recovery |
1821 | * in nfs4_exchange_id */ | |
1822 | default: | |
cc0a9843 TM |
1823 | dprintk("%s: exit with error %d for server %s\n", __func__, |
1824 | status, clp->cl_hostname); | |
2a6ee6aa TM |
1825 | return status; |
1826 | } | |
1827 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
cc0a9843 TM |
1828 | dprintk("%s: handled error %d for server %s\n", __func__, status, |
1829 | clp->cl_hostname); | |
2a6ee6aa TM |
1830 | return 0; |
1831 | } | |
1832 | ||
b42353ff | 1833 | static int nfs4_establish_lease(struct nfs_client *clp) |
02860014 TM |
1834 | { |
1835 | struct rpc_cred *cred; | |
c48f4f35 TM |
1836 | const struct nfs4_state_recovery_ops *ops = |
1837 | clp->cl_mvops->reboot_recovery_ops; | |
2a6ee6aa | 1838 | int status; |
02860014 | 1839 | |
5cae02f4 | 1840 | nfs4_begin_drain_session(clp); |
73d8bde5 | 1841 | cred = nfs4_get_clid_cred(clp); |
2a6ee6aa TM |
1842 | if (cred == NULL) |
1843 | return -ENOENT; | |
1844 | status = ops->establish_clid(clp, cred); | |
1845 | put_rpccred(cred); | |
1846 | if (status != 0) | |
b42353ff TM |
1847 | return status; |
1848 | pnfs_destroy_all_layouts(clp); | |
1849 | return 0; | |
1850 | } | |
1851 | ||
6bbb4ae8 CL |
1852 | /* |
1853 | * Returns zero or a negative errno. NFS4ERR values are converted | |
1854 | * to local errno values. | |
1855 | */ | |
b42353ff TM |
1856 | static int nfs4_reclaim_lease(struct nfs_client *clp) |
1857 | { | |
1858 | int status; | |
1859 | ||
1860 | status = nfs4_establish_lease(clp); | |
1861 | if (status < 0) | |
1862 | return nfs4_handle_reclaim_lease_error(clp, status); | |
1863 | if (test_and_clear_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state)) | |
1864 | nfs4_state_start_reclaim_nograce(clp); | |
1865 | if (!test_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) | |
1866 | set_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state); | |
1867 | clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); | |
1868 | clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1869 | return 0; | |
1870 | } | |
1871 | ||
1872 | static int nfs4_purge_lease(struct nfs_client *clp) | |
1873 | { | |
1874 | int status; | |
1875 | ||
1876 | status = nfs4_establish_lease(clp); | |
1877 | if (status < 0) | |
2a6ee6aa | 1878 | return nfs4_handle_reclaim_lease_error(clp, status); |
b42353ff TM |
1879 | clear_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state); |
1880 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1881 | nfs4_state_start_reclaim_nograce(clp); | |
2a6ee6aa | 1882 | return 0; |
02860014 TM |
1883 | } |
1884 | ||
c9fdeb28 CL |
1885 | /* |
1886 | * Try remote migration of one FSID from a source server to a | |
1887 | * destination server. The source server provides a list of | |
1888 | * potential destinations. | |
1889 | * | |
1890 | * Returns zero or a negative NFS4ERR status code. | |
1891 | */ | |
1892 | static int nfs4_try_migration(struct nfs_server *server, struct rpc_cred *cred) | |
1893 | { | |
1894 | struct nfs_client *clp = server->nfs_client; | |
1895 | struct nfs4_fs_locations *locations = NULL; | |
1896 | struct inode *inode; | |
1897 | struct page *page; | |
1898 | int status, result; | |
1899 | ||
1900 | dprintk("--> %s: FSID %llx:%llx on \"%s\"\n", __func__, | |
1901 | (unsigned long long)server->fsid.major, | |
1902 | (unsigned long long)server->fsid.minor, | |
1903 | clp->cl_hostname); | |
1904 | ||
1905 | result = 0; | |
1906 | page = alloc_page(GFP_KERNEL); | |
1907 | locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL); | |
1908 | if (page == NULL || locations == NULL) { | |
1909 | dprintk("<-- %s: no memory\n", __func__); | |
1910 | goto out; | |
1911 | } | |
1912 | ||
2b0143b5 | 1913 | inode = d_inode(server->super->s_root); |
c9fdeb28 CL |
1914 | result = nfs4_proc_get_locations(inode, locations, page, cred); |
1915 | if (result) { | |
1916 | dprintk("<-- %s: failed to retrieve fs_locations: %d\n", | |
1917 | __func__, result); | |
1918 | goto out; | |
1919 | } | |
1920 | ||
1921 | result = -NFS4ERR_NXIO; | |
1922 | if (!(locations->fattr.valid & NFS_ATTR_FATTR_V4_LOCATIONS)) { | |
1923 | dprintk("<-- %s: No fs_locations data, migration skipped\n", | |
1924 | __func__); | |
1925 | goto out; | |
1926 | } | |
1927 | ||
1928 | nfs4_begin_drain_session(clp); | |
1929 | ||
1930 | status = nfs4_replace_transport(server, locations); | |
1931 | if (status != 0) { | |
1932 | dprintk("<-- %s: failed to replace transport: %d\n", | |
1933 | __func__, status); | |
1934 | goto out; | |
1935 | } | |
1936 | ||
1937 | result = 0; | |
1938 | dprintk("<-- %s: migration succeeded\n", __func__); | |
1939 | ||
1940 | out: | |
1941 | if (page != NULL) | |
1942 | __free_page(page); | |
1943 | kfree(locations); | |
1944 | if (result) { | |
1945 | pr_err("NFS: migration recovery failed (server %s)\n", | |
1946 | clp->cl_hostname); | |
1947 | set_bit(NFS_MIG_FAILED, &server->mig_status); | |
1948 | } | |
1949 | return result; | |
1950 | } | |
1951 | ||
1952 | /* | |
1953 | * Returns zero or a negative NFS4ERR status code. | |
1954 | */ | |
1955 | static int nfs4_handle_migration(struct nfs_client *clp) | |
1956 | { | |
1957 | const struct nfs4_state_maintenance_ops *ops = | |
1958 | clp->cl_mvops->state_renewal_ops; | |
1959 | struct nfs_server *server; | |
1960 | struct rpc_cred *cred; | |
1961 | ||
1962 | dprintk("%s: migration reported on \"%s\"\n", __func__, | |
1963 | clp->cl_hostname); | |
1964 | ||
1965 | spin_lock(&clp->cl_lock); | |
1966 | cred = ops->get_state_renewal_cred_locked(clp); | |
1967 | spin_unlock(&clp->cl_lock); | |
1968 | if (cred == NULL) | |
1969 | return -NFS4ERR_NOENT; | |
1970 | ||
1971 | clp->cl_mig_gen++; | |
1972 | restart: | |
1973 | rcu_read_lock(); | |
1974 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { | |
1975 | int status; | |
1976 | ||
1977 | if (server->mig_gen == clp->cl_mig_gen) | |
1978 | continue; | |
1979 | server->mig_gen = clp->cl_mig_gen; | |
1980 | ||
1981 | if (!test_and_clear_bit(NFS_MIG_IN_TRANSITION, | |
1982 | &server->mig_status)) | |
1983 | continue; | |
1984 | ||
1985 | rcu_read_unlock(); | |
1986 | status = nfs4_try_migration(server, cred); | |
1987 | if (status < 0) { | |
1988 | put_rpccred(cred); | |
1989 | return status; | |
1990 | } | |
1991 | goto restart; | |
1992 | } | |
1993 | rcu_read_unlock(); | |
1994 | put_rpccred(cred); | |
1995 | return 0; | |
1996 | } | |
1997 | ||
b7f7a66e CL |
1998 | /* |
1999 | * Test each nfs_server on the clp's cl_superblocks list to see | |
2000 | * if it's moved to another server. Stop when the server no longer | |
2001 | * returns NFS4ERR_LEASE_MOVED. | |
2002 | */ | |
2003 | static int nfs4_handle_lease_moved(struct nfs_client *clp) | |
2004 | { | |
2005 | const struct nfs4_state_maintenance_ops *ops = | |
2006 | clp->cl_mvops->state_renewal_ops; | |
2007 | struct nfs_server *server; | |
2008 | struct rpc_cred *cred; | |
2009 | ||
2010 | dprintk("%s: lease moved reported on \"%s\"\n", __func__, | |
2011 | clp->cl_hostname); | |
2012 | ||
2013 | spin_lock(&clp->cl_lock); | |
2014 | cred = ops->get_state_renewal_cred_locked(clp); | |
2015 | spin_unlock(&clp->cl_lock); | |
2016 | if (cred == NULL) | |
2017 | return -NFS4ERR_NOENT; | |
2018 | ||
2019 | clp->cl_mig_gen++; | |
2020 | restart: | |
2021 | rcu_read_lock(); | |
2022 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { | |
2023 | struct inode *inode; | |
2024 | int status; | |
2025 | ||
2026 | if (server->mig_gen == clp->cl_mig_gen) | |
2027 | continue; | |
2028 | server->mig_gen = clp->cl_mig_gen; | |
2029 | ||
2030 | rcu_read_unlock(); | |
2031 | ||
2b0143b5 | 2032 | inode = d_inode(server->super->s_root); |
b7f7a66e CL |
2033 | status = nfs4_proc_fsid_present(inode, cred); |
2034 | if (status != -NFS4ERR_MOVED) | |
2035 | goto restart; /* wasn't this one */ | |
2036 | if (nfs4_try_migration(server, cred) == -NFS4ERR_LEASE_MOVED) | |
2037 | goto restart; /* there are more */ | |
2038 | goto out; | |
2039 | } | |
2040 | rcu_read_unlock(); | |
2041 | ||
2042 | out: | |
2043 | put_rpccred(cred); | |
2044 | return 0; | |
2045 | } | |
2046 | ||
05f4c350 CL |
2047 | /** |
2048 | * nfs4_discover_server_trunking - Detect server IP address trunking | |
2049 | * | |
2050 | * @clp: nfs_client under test | |
2051 | * @result: OUT: found nfs_client, or clp | |
2052 | * | |
2053 | * Returns zero or a negative errno. If zero is returned, | |
2054 | * an nfs_client pointer is planted in "result". | |
2055 | * | |
2056 | * Note: since we are invoked in process context, and | |
2057 | * not from inside the state manager, we cannot use | |
2058 | * nfs4_handle_reclaim_lease_error(). | |
2059 | */ | |
2060 | int nfs4_discover_server_trunking(struct nfs_client *clp, | |
2061 | struct nfs_client **result) | |
2062 | { | |
2063 | const struct nfs4_state_recovery_ops *ops = | |
2064 | clp->cl_mvops->reboot_recovery_ops; | |
05f4c350 CL |
2065 | struct rpc_clnt *clnt; |
2066 | struct rpc_cred *cred; | |
4edaa308 | 2067 | int i, status; |
05f4c350 CL |
2068 | |
2069 | dprintk("NFS: %s: testing '%s'\n", __func__, clp->cl_hostname); | |
2070 | ||
05f4c350 | 2071 | clnt = clp->cl_rpcclient; |
05f4c350 CL |
2072 | i = 0; |
2073 | ||
2074 | mutex_lock(&nfs_clid_init_mutex); | |
05f4c350 | 2075 | again: |
ea33e6c3 | 2076 | status = -ENOENT; |
73d8bde5 | 2077 | cred = nfs4_get_clid_cred(clp); |
05f4c350 CL |
2078 | if (cred == NULL) |
2079 | goto out_unlock; | |
2080 | ||
2081 | status = ops->detect_trunking(clp, result, cred); | |
2082 | put_rpccred(cred); | |
2083 | switch (status) { | |
2084 | case 0: | |
2085 | break; | |
05f4c350 | 2086 | case -ETIMEDOUT: |
150e7260 TM |
2087 | if (clnt->cl_softrtry) |
2088 | break; | |
2089 | case -NFS4ERR_DELAY: | |
05f4c350 CL |
2090 | case -EAGAIN: |
2091 | ssleep(1); | |
202c312d | 2092 | case -NFS4ERR_STALE_CLIENTID: |
05f4c350 CL |
2093 | dprintk("NFS: %s after status %d, retrying\n", |
2094 | __func__, status); | |
2095 | goto again; | |
4edaa308 | 2096 | case -EACCES: |
d688f7b8 CL |
2097 | if (i++ == 0) { |
2098 | nfs4_root_machine_cred(clp); | |
2099 | goto again; | |
2100 | } | |
6d769f1e | 2101 | if (clnt->cl_auth->au_flavor == RPC_AUTH_UNIX) |
4edaa308 | 2102 | break; |
05f4c350 CL |
2103 | case -NFS4ERR_CLID_INUSE: |
2104 | case -NFS4ERR_WRONGSEC: | |
6d769f1e JL |
2105 | /* No point in retrying if we already used RPC_AUTH_UNIX */ |
2106 | if (clnt->cl_auth->au_flavor == RPC_AUTH_UNIX) { | |
2107 | status = -EPERM; | |
2108 | break; | |
2109 | } | |
79d852bf | 2110 | clnt = rpc_clone_client_set_auth(clnt, RPC_AUTH_UNIX); |
05f4c350 CL |
2111 | if (IS_ERR(clnt)) { |
2112 | status = PTR_ERR(clnt); | |
2113 | break; | |
2114 | } | |
b193d59a TM |
2115 | /* Note: this is safe because we haven't yet marked the |
2116 | * client as ready, so we are the only user of | |
2117 | * clp->cl_rpcclient | |
2118 | */ | |
2119 | clnt = xchg(&clp->cl_rpcclient, clnt); | |
2120 | rpc_shutdown_client(clnt); | |
2121 | clnt = clp->cl_rpcclient; | |
05f4c350 CL |
2122 | goto again; |
2123 | ||
2124 | case -NFS4ERR_MINOR_VERS_MISMATCH: | |
2125 | status = -EPROTONOSUPPORT; | |
2126 | break; | |
2127 | ||
2128 | case -EKEYEXPIRED: | |
05f4c350 CL |
2129 | case -NFS4ERR_NOT_SAME: /* FixMe: implement recovery |
2130 | * in nfs4_exchange_id */ | |
2131 | status = -EKEYEXPIRED; | |
ea33e6c3 TM |
2132 | break; |
2133 | default: | |
2134 | pr_warn("NFS: %s unhandled error %d. Exiting with error EIO\n", | |
2135 | __func__, status); | |
2136 | status = -EIO; | |
05f4c350 CL |
2137 | } |
2138 | ||
2139 | out_unlock: | |
2140 | mutex_unlock(&nfs_clid_init_mutex); | |
05f4c350 CL |
2141 | dprintk("NFS: %s: status = %d\n", __func__, status); |
2142 | return status; | |
2143 | } | |
2144 | ||
76db6d95 | 2145 | #ifdef CONFIG_NFS_V4_1 |
9f594791 | 2146 | void nfs4_schedule_session_recovery(struct nfs4_session *session, int err) |
0400a6b0 | 2147 | { |
444f72fe TM |
2148 | struct nfs_client *clp = session->clp; |
2149 | ||
9f594791 TM |
2150 | switch (err) { |
2151 | default: | |
2152 | set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); | |
2153 | break; | |
2154 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
2155 | set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); | |
2156 | } | |
444f72fe | 2157 | nfs4_schedule_lease_recovery(clp); |
0400a6b0 | 2158 | } |
cbdabc7f | 2159 | EXPORT_SYMBOL_GPL(nfs4_schedule_session_recovery); |
0400a6b0 | 2160 | |
3f10a6af | 2161 | void nfs41_notify_server(struct nfs_client *clp) |
ac074835 TM |
2162 | { |
2163 | /* Use CHECK_LEASE to ping the server with a SEQUENCE */ | |
2164 | set_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); | |
2165 | nfs4_schedule_state_manager(clp); | |
2166 | } | |
2167 | ||
0f79fd6f TM |
2168 | static void nfs4_reset_all_state(struct nfs_client *clp) |
2169 | { | |
2170 | if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) == 0) { | |
2c820d9a | 2171 | set_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state); |
be0bfed0 | 2172 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
0f79fd6f | 2173 | nfs4_state_start_reclaim_nograce(clp); |
cc0a9843 TM |
2174 | dprintk("%s: scheduling reset of all state for server %s!\n", |
2175 | __func__, clp->cl_hostname); | |
0400a6b0 | 2176 | nfs4_schedule_state_manager(clp); |
0f79fd6f TM |
2177 | } |
2178 | } | |
2179 | ||
2180 | static void nfs41_handle_server_reboot(struct nfs_client *clp) | |
2181 | { | |
2182 | if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) == 0) { | |
2183 | nfs4_state_start_reclaim_reboot(clp); | |
cc0a9843 TM |
2184 | dprintk("%s: server %s rebooted!\n", __func__, |
2185 | clp->cl_hostname); | |
0400a6b0 | 2186 | nfs4_schedule_state_manager(clp); |
0f79fd6f TM |
2187 | } |
2188 | } | |
2189 | ||
8b895ce6 | 2190 | static void nfs41_handle_all_state_revoked(struct nfs_client *clp) |
0f79fd6f | 2191 | { |
0f79fd6f | 2192 | nfs4_reset_all_state(clp); |
cc0a9843 | 2193 | dprintk("%s: state revoked on server %s\n", __func__, clp->cl_hostname); |
0f79fd6f TM |
2194 | } |
2195 | ||
8b895ce6 TM |
2196 | static void nfs41_handle_some_state_revoked(struct nfs_client *clp) |
2197 | { | |
2198 | nfs4_state_mark_reclaim_helper(clp, nfs4_state_mark_reclaim_nograce); | |
2199 | nfs4_schedule_state_manager(clp); | |
2200 | ||
2201 | dprintk("%s: state revoked on server %s\n", __func__, clp->cl_hostname); | |
2202 | } | |
2203 | ||
0f79fd6f TM |
2204 | static void nfs41_handle_recallable_state_revoked(struct nfs_client *clp) |
2205 | { | |
4099287f TM |
2206 | /* FIXME: For now, we destroy all layouts. */ |
2207 | pnfs_destroy_all_layouts(clp); | |
2208 | /* FIXME: For now, we test all delegations+open state+locks. */ | |
2209 | nfs41_handle_some_state_revoked(clp); | |
cc0a9843 TM |
2210 | dprintk("%s: Recallable state revoked on server %s!\n", __func__, |
2211 | clp->cl_hostname); | |
0f79fd6f TM |
2212 | } |
2213 | ||
a9e64442 | 2214 | static void nfs41_handle_backchannel_fault(struct nfs_client *clp) |
0f79fd6f | 2215 | { |
b1352905 TM |
2216 | set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); |
2217 | nfs4_schedule_state_manager(clp); | |
2218 | ||
cc0a9843 TM |
2219 | dprintk("%s: server %s declared a backchannel fault\n", __func__, |
2220 | clp->cl_hostname); | |
0f79fd6f TM |
2221 | } |
2222 | ||
a9e64442 WAA |
2223 | static void nfs41_handle_cb_path_down(struct nfs_client *clp) |
2224 | { | |
2225 | if (test_and_set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, | |
2226 | &clp->cl_state) == 0) | |
2227 | nfs4_schedule_state_manager(clp); | |
2228 | } | |
2229 | ||
0629e370 AB |
2230 | void nfs41_handle_sequence_flag_errors(struct nfs_client *clp, u32 flags) |
2231 | { | |
2232 | if (!flags) | |
2233 | return; | |
2c820d9a CL |
2234 | |
2235 | dprintk("%s: \"%s\" (client ID %llx) flags=0x%08x\n", | |
2236 | __func__, clp->cl_hostname, clp->cl_clientid, flags); | |
2237 | ||
111d489f | 2238 | if (flags & SEQ4_STATUS_RESTART_RECLAIM_NEEDED) |
0f79fd6f | 2239 | nfs41_handle_server_reboot(clp); |
8b895ce6 TM |
2240 | if (flags & (SEQ4_STATUS_EXPIRED_ALL_STATE_REVOKED)) |
2241 | nfs41_handle_all_state_revoked(clp); | |
2242 | if (flags & (SEQ4_STATUS_EXPIRED_SOME_STATE_REVOKED | | |
d1c2331e | 2243 | SEQ4_STATUS_ADMIN_STATE_REVOKED)) |
8b895ce6 | 2244 | nfs41_handle_some_state_revoked(clp); |
d1c2331e CL |
2245 | if (flags & SEQ4_STATUS_LEASE_MOVED) |
2246 | nfs4_schedule_lease_moved_recovery(clp); | |
111d489f | 2247 | if (flags & SEQ4_STATUS_RECALLABLE_STATE_REVOKED) |
0f79fd6f | 2248 | nfs41_handle_recallable_state_revoked(clp); |
a9e64442 WAA |
2249 | if (flags & SEQ4_STATUS_BACKCHANNEL_FAULT) |
2250 | nfs41_handle_backchannel_fault(clp); | |
2251 | else if (flags & (SEQ4_STATUS_CB_PATH_DOWN | | |
2252 | SEQ4_STATUS_CB_PATH_DOWN_SESSION)) | |
0f79fd6f | 2253 | nfs41_handle_cb_path_down(clp); |
0629e370 AB |
2254 | } |
2255 | ||
c3fad1b1 AA |
2256 | static int nfs4_reset_session(struct nfs_client *clp) |
2257 | { | |
848f5bda | 2258 | struct rpc_cred *cred; |
c3fad1b1 AA |
2259 | int status; |
2260 | ||
1a47e7a6 TM |
2261 | if (!nfs4_has_session(clp)) |
2262 | return 0; | |
38045412 | 2263 | nfs4_begin_drain_session(clp); |
73d8bde5 | 2264 | cred = nfs4_get_clid_cred(clp); |
848f5bda | 2265 | status = nfs4_proc_destroy_session(clp->cl_session, cred); |
c489ee29 TM |
2266 | switch (status) { |
2267 | case 0: | |
2268 | case -NFS4ERR_BADSESSION: | |
2269 | case -NFS4ERR_DEADSESSION: | |
2270 | break; | |
2271 | case -NFS4ERR_BACK_CHAN_BUSY: | |
2272 | case -NFS4ERR_DELAY: | |
2273 | set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); | |
2274 | status = 0; | |
2275 | ssleep(1); | |
2276 | goto out; | |
2277 | default: | |
f455848a | 2278 | status = nfs4_recovery_handle_error(clp, status); |
c3fad1b1 AA |
2279 | goto out; |
2280 | } | |
2281 | ||
2282 | memset(clp->cl_session->sess_id.data, 0, NFS4_MAX_SESSIONID_LEN); | |
848f5bda | 2283 | status = nfs4_proc_create_session(clp, cred); |
41f54a55 | 2284 | if (status) { |
cc0a9843 TM |
2285 | dprintk("%s: session reset failed with status %d for server %s!\n", |
2286 | __func__, status, clp->cl_hostname); | |
f2c1b510 | 2287 | status = nfs4_handle_reclaim_lease_error(clp, status); |
41f54a55 AA |
2288 | goto out; |
2289 | } | |
bda197f5 | 2290 | nfs41_finish_session_reset(clp); |
cc0a9843 TM |
2291 | dprintk("%s: session reset was successful for server %s!\n", |
2292 | __func__, clp->cl_hostname); | |
41f54a55 | 2293 | out: |
848f5bda TM |
2294 | if (cred) |
2295 | put_rpccred(cred); | |
c3fad1b1 AA |
2296 | return status; |
2297 | } | |
76db6d95 | 2298 | |
a9e64442 WAA |
2299 | static int nfs4_bind_conn_to_session(struct nfs_client *clp) |
2300 | { | |
2cf047c9 TM |
2301 | struct rpc_cred *cred; |
2302 | int ret; | |
2303 | ||
1a47e7a6 TM |
2304 | if (!nfs4_has_session(clp)) |
2305 | return 0; | |
43ac544c | 2306 | nfs4_begin_drain_session(clp); |
73d8bde5 | 2307 | cred = nfs4_get_clid_cred(clp); |
2cf047c9 TM |
2308 | ret = nfs4_proc_bind_conn_to_session(clp, cred); |
2309 | if (cred) | |
2310 | put_rpccred(cred); | |
43ac544c | 2311 | clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); |
bf674c82 TM |
2312 | switch (ret) { |
2313 | case 0: | |
cc0a9843 TM |
2314 | dprintk("%s: bind_conn_to_session was successful for server %s!\n", |
2315 | __func__, clp->cl_hostname); | |
bf674c82 TM |
2316 | break; |
2317 | case -NFS4ERR_DELAY: | |
2318 | ssleep(1); | |
2319 | set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); | |
2320 | break; | |
2321 | default: | |
2322 | return nfs4_recovery_handle_error(clp, ret); | |
2323 | } | |
2324 | return 0; | |
a9e64442 | 2325 | } |
76db6d95 | 2326 | #else /* CONFIG_NFS_V4_1 */ |
c3fad1b1 | 2327 | static int nfs4_reset_session(struct nfs_client *clp) { return 0; } |
a9e64442 WAA |
2328 | |
2329 | static int nfs4_bind_conn_to_session(struct nfs_client *clp) | |
2330 | { | |
2331 | return 0; | |
2332 | } | |
76db6d95 AA |
2333 | #endif /* CONFIG_NFS_V4_1 */ |
2334 | ||
e005e804 | 2335 | static void nfs4_state_manager(struct nfs_client *clp) |
02860014 | 2336 | { |
02860014 | 2337 | int status = 0; |
8ed27d4f | 2338 | const char *section = "", *section_sep = ""; |
02860014 | 2339 | |
02860014 | 2340 | /* Ensure exclusive access to NFSv4 state */ |
47c2199b | 2341 | do { |
2c820d9a | 2342 | if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) { |
8ed27d4f | 2343 | section = "purge state"; |
b42353ff | 2344 | status = nfs4_purge_lease(clp); |
2a6ee6aa TM |
2345 | if (status < 0) |
2346 | goto out_error; | |
b42353ff | 2347 | continue; |
2c820d9a CL |
2348 | } |
2349 | ||
b42353ff | 2350 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) { |
8ed27d4f | 2351 | section = "lease expired"; |
b79a4a1b TM |
2352 | /* We're going to have to re-establish a clientid */ |
2353 | status = nfs4_reclaim_lease(clp); | |
2a6ee6aa | 2354 | if (status < 0) |
b79a4a1b | 2355 | goto out_error; |
b42353ff | 2356 | continue; |
e598d843 TM |
2357 | } |
2358 | ||
c3fad1b1 | 2359 | /* Initialize or reset the session */ |
1a47e7a6 | 2360 | if (test_and_clear_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state)) { |
8ed27d4f | 2361 | section = "reset session"; |
4d643d1d | 2362 | status = nfs4_reset_session(clp); |
b6d408ba TM |
2363 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
2364 | continue; | |
2365 | if (status < 0) | |
76db6d95 | 2366 | goto out_error; |
76db6d95 | 2367 | } |
b6d408ba | 2368 | |
a9e64442 WAA |
2369 | /* Send BIND_CONN_TO_SESSION */ |
2370 | if (test_and_clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION, | |
1a47e7a6 | 2371 | &clp->cl_state)) { |
8ed27d4f | 2372 | section = "bind conn to session"; |
a9e64442 WAA |
2373 | status = nfs4_bind_conn_to_session(clp); |
2374 | if (status < 0) | |
2375 | goto out_error; | |
bf674c82 | 2376 | continue; |
a9e64442 WAA |
2377 | } |
2378 | ||
5df904ae TM |
2379 | if (test_and_clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state)) { |
2380 | section = "check lease"; | |
2381 | status = nfs4_check_lease(clp); | |
2382 | if (status < 0) | |
2383 | goto out_error; | |
8faaa6d5 | 2384 | continue; |
c9fdeb28 CL |
2385 | } |
2386 | ||
2387 | if (test_and_clear_bit(NFS4CLNT_MOVED, &clp->cl_state)) { | |
2388 | section = "migration"; | |
2389 | status = nfs4_handle_migration(clp); | |
2390 | if (status < 0) | |
2391 | goto out_error; | |
5df904ae TM |
2392 | } |
2393 | ||
b7f7a66e CL |
2394 | if (test_and_clear_bit(NFS4CLNT_LEASE_MOVED, &clp->cl_state)) { |
2395 | section = "lease moved"; | |
2396 | status = nfs4_handle_lease_moved(clp); | |
2397 | if (status < 0) | |
2398 | goto out_error; | |
2399 | } | |
2400 | ||
b79a4a1b | 2401 | /* First recover reboot state... */ |
e345e88a | 2402 | if (test_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) { |
8ed27d4f | 2403 | section = "reclaim reboot"; |
591d71cb | 2404 | status = nfs4_do_reclaim(clp, |
c48f4f35 | 2405 | clp->cl_mvops->reboot_recovery_ops); |
df817ba3 | 2406 | if (status == -EAGAIN) |
b6d408ba TM |
2407 | continue; |
2408 | if (status < 0) | |
2409 | goto out_error; | |
df817ba3 | 2410 | nfs4_state_end_reclaim_reboot(clp); |
02860014 TM |
2411 | } |
2412 | ||
b79a4a1b TM |
2413 | /* Now recover expired state... */ |
2414 | if (test_and_clear_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) { | |
8ed27d4f | 2415 | section = "reclaim nograce"; |
591d71cb | 2416 | status = nfs4_do_reclaim(clp, |
c48f4f35 | 2417 | clp->cl_mvops->nograce_recovery_ops); |
df817ba3 | 2418 | if (status == -EAGAIN) |
b6d408ba TM |
2419 | continue; |
2420 | if (status < 0) | |
b79a4a1b | 2421 | goto out_error; |
1da177e4 | 2422 | } |
707fb4b3 | 2423 | |
5601a00d | 2424 | nfs4_end_drain_session(clp); |
707fb4b3 TM |
2425 | if (test_and_clear_bit(NFS4CLNT_DELEGRETURN, &clp->cl_state)) { |
2426 | nfs_client_return_marked_delegations(clp); | |
2427 | continue; | |
2428 | } | |
e005e804 TM |
2429 | |
2430 | nfs4_clear_state_manager_bit(clp); | |
f3c76491 TM |
2431 | /* Did we race with an attempt to give us more work? */ |
2432 | if (clp->cl_state == 0) | |
2433 | break; | |
2434 | if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) != 0) | |
2435 | break; | |
47c2199b | 2436 | } while (atomic_read(&clp->cl_count) > 1); |
e005e804 | 2437 | return; |
1da177e4 | 2438 | out_error: |
8ed27d4f WAA |
2439 | if (strlen(section)) |
2440 | section_sep = ": "; | |
2441 | pr_warn_ratelimited("NFS: state manager%s%s failed on NFSv4 server %s" | |
2442 | " with error %d\n", section_sep, section, | |
2443 | clp->cl_hostname, -status); | |
ffe5a830 | 2444 | ssleep(1); |
5601a00d | 2445 | nfs4_end_drain_session(clp); |
e005e804 TM |
2446 | nfs4_clear_state_manager_bit(clp); |
2447 | } | |
2448 | ||
2449 | static int nfs4_run_state_manager(void *ptr) | |
2450 | { | |
2451 | struct nfs_client *clp = ptr; | |
2452 | ||
2453 | allow_signal(SIGKILL); | |
2454 | nfs4_state_manager(clp); | |
2455 | nfs_put_client(clp); | |
2456 | module_put_and_exit(0); | |
2457 | return 0; | |
1da177e4 LT |
2458 | } |
2459 | ||
2460 | /* | |
2461 | * Local variables: | |
2462 | * c-basic-offset: 8 | |
2463 | * End: | |
2464 | */ |