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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 |
86cfb041 | 497 | nfs4_reset_state_owner(struct nfs4_state_owner *sp) |
1da177e4 | 498 | { |
86cfb041 N |
499 | /* This state_owner is no longer usable, but must |
500 | * remain in place so that state recovery can find it | |
501 | * and the opens associated with it. | |
502 | * It may also be used for new 'open' request to | |
503 | * return a delegation to the server. | |
504 | * So update the 'create_time' so that it looks like | |
505 | * a new state_owner. This will cause the server to | |
506 | * request an OPEN_CONFIRM to start a new sequence. | |
507 | */ | |
508 | sp->so_seqid.create_time = ktime_get(); | |
1da177e4 LT |
509 | } |
510 | ||
0aaaf5c4 CL |
511 | static void nfs4_free_state_owner(struct nfs4_state_owner *sp) |
512 | { | |
7ba127ab | 513 | nfs4_destroy_seqid_counter(&sp->so_seqid); |
0aaaf5c4 CL |
514 | put_rpccred(sp->so_cred); |
515 | kfree(sp); | |
516 | } | |
517 | ||
518 | static void nfs4_gc_state_owners(struct nfs_server *server) | |
519 | { | |
520 | struct nfs_client *clp = server->nfs_client; | |
521 | struct nfs4_state_owner *sp, *tmp; | |
522 | unsigned long time_min, time_max; | |
523 | LIST_HEAD(doomed); | |
524 | ||
525 | spin_lock(&clp->cl_lock); | |
526 | time_max = jiffies; | |
527 | time_min = (long)time_max - (long)clp->cl_lease_time; | |
528 | list_for_each_entry_safe(sp, tmp, &server->state_owners_lru, so_lru) { | |
529 | /* NB: LRU is sorted so that oldest is at the head */ | |
530 | if (time_in_range(sp->so_expires, time_min, time_max)) | |
531 | break; | |
532 | list_move(&sp->so_lru, &doomed); | |
533 | nfs4_remove_state_owner_locked(sp); | |
534 | } | |
535 | spin_unlock(&clp->cl_lock); | |
536 | ||
537 | list_for_each_entry_safe(sp, tmp, &doomed, so_lru) { | |
538 | list_del(&sp->so_lru); | |
539 | nfs4_free_state_owner(sp); | |
540 | } | |
541 | } | |
542 | ||
24d292b8 CL |
543 | /** |
544 | * nfs4_get_state_owner - Look up a state owner given a credential | |
545 | * @server: nfs_server to search | |
546 | * @cred: RPC credential to match | |
547 | * | |
548 | * Returns a pointer to an instantiated nfs4_state_owner struct, or NULL. | |
549 | */ | |
550 | struct nfs4_state_owner *nfs4_get_state_owner(struct nfs_server *server, | |
d1e284d5 TM |
551 | struct rpc_cred *cred, |
552 | gfp_t gfp_flags) | |
1da177e4 | 553 | { |
7539bbab | 554 | struct nfs_client *clp = server->nfs_client; |
1da177e4 LT |
555 | struct nfs4_state_owner *sp, *new; |
556 | ||
1da177e4 | 557 | spin_lock(&clp->cl_lock); |
24d292b8 | 558 | sp = nfs4_find_state_owner_locked(server, cred); |
1da177e4 | 559 | spin_unlock(&clp->cl_lock); |
1da177e4 | 560 | if (sp != NULL) |
0aaaf5c4 | 561 | goto out; |
d1e284d5 | 562 | new = nfs4_alloc_state_owner(server, cred, gfp_flags); |
9f958ab8 | 563 | if (new == NULL) |
0aaaf5c4 | 564 | goto out; |
9157c31d TM |
565 | do { |
566 | if (ida_pre_get(&server->openowner_id, gfp_flags) == 0) | |
567 | break; | |
568 | spin_lock(&clp->cl_lock); | |
569 | sp = nfs4_insert_state_owner_locked(new); | |
570 | spin_unlock(&clp->cl_lock); | |
571 | } while (sp == ERR_PTR(-EAGAIN)); | |
d1e284d5 TM |
572 | if (sp != new) |
573 | nfs4_free_state_owner(new); | |
0aaaf5c4 CL |
574 | out: |
575 | nfs4_gc_state_owners(server); | |
9f958ab8 | 576 | return sp; |
1da177e4 LT |
577 | } |
578 | ||
24d292b8 CL |
579 | /** |
580 | * nfs4_put_state_owner - Release a nfs4_state_owner | |
581 | * @sp: state owner data to release | |
7bf97bc2 TM |
582 | * |
583 | * Note that we keep released state owners on an LRU | |
584 | * list. | |
585 | * This caches valid state owners so that they can be | |
586 | * reused, to avoid the OPEN_CONFIRM on minor version 0. | |
587 | * It also pins the uniquifier of dropped state owners for | |
588 | * a while, to ensure that those state owner names are | |
589 | * never reused. | |
24d292b8 | 590 | */ |
1da177e4 LT |
591 | void nfs4_put_state_owner(struct nfs4_state_owner *sp) |
592 | { | |
0aaaf5c4 CL |
593 | struct nfs_server *server = sp->so_server; |
594 | struct nfs_client *clp = server->nfs_client; | |
1da177e4 LT |
595 | |
596 | if (!atomic_dec_and_lock(&sp->so_count, &clp->cl_lock)) | |
597 | return; | |
0aaaf5c4 | 598 | |
7bf97bc2 TM |
599 | sp->so_expires = jiffies; |
600 | list_add_tail(&sp->so_lru, &server->state_owners_lru); | |
601 | spin_unlock(&clp->cl_lock); | |
0aaaf5c4 CL |
602 | } |
603 | ||
604 | /** | |
605 | * nfs4_purge_state_owners - Release all cached state owners | |
606 | * @server: nfs_server with cached state owners to release | |
607 | * | |
608 | * Called at umount time. Remaining state owners will be on | |
609 | * the LRU with ref count of zero. | |
610 | */ | |
611 | void nfs4_purge_state_owners(struct nfs_server *server) | |
612 | { | |
613 | struct nfs_client *clp = server->nfs_client; | |
614 | struct nfs4_state_owner *sp, *tmp; | |
615 | LIST_HEAD(doomed); | |
616 | ||
617 | spin_lock(&clp->cl_lock); | |
618 | list_for_each_entry_safe(sp, tmp, &server->state_owners_lru, so_lru) { | |
619 | list_move(&sp->so_lru, &doomed); | |
620 | nfs4_remove_state_owner_locked(sp); | |
621 | } | |
1da177e4 | 622 | spin_unlock(&clp->cl_lock); |
0aaaf5c4 CL |
623 | |
624 | list_for_each_entry_safe(sp, tmp, &doomed, so_lru) { | |
625 | list_del(&sp->so_lru); | |
626 | nfs4_free_state_owner(sp); | |
627 | } | |
1da177e4 LT |
628 | } |
629 | ||
630 | static struct nfs4_state * | |
631 | nfs4_alloc_open_state(void) | |
632 | { | |
633 | struct nfs4_state *state; | |
634 | ||
8535b2be | 635 | state = kzalloc(sizeof(*state), GFP_NOFS); |
1da177e4 LT |
636 | if (!state) |
637 | return NULL; | |
1da177e4 LT |
638 | atomic_set(&state->count, 1); |
639 | INIT_LIST_HEAD(&state->lock_states); | |
8d0a8a9d | 640 | spin_lock_init(&state->state_lock); |
8bda4e4c | 641 | seqlock_init(&state->seqlock); |
1da177e4 LT |
642 | return state; |
643 | } | |
644 | ||
4cecb76f | 645 | void |
dc0b027d | 646 | nfs4_state_set_mode_locked(struct nfs4_state *state, fmode_t fmode) |
4cecb76f | 647 | { |
dc0b027d | 648 | if (state->state == fmode) |
4cecb76f TM |
649 | return; |
650 | /* NB! List reordering - see the reclaim code for why. */ | |
dc0b027d TM |
651 | if ((fmode & FMODE_WRITE) != (state->state & FMODE_WRITE)) { |
652 | if (fmode & FMODE_WRITE) | |
4cecb76f TM |
653 | list_move(&state->open_states, &state->owner->so_states); |
654 | else | |
655 | list_move_tail(&state->open_states, &state->owner->so_states); | |
656 | } | |
dc0b027d | 657 | state->state = fmode; |
4cecb76f TM |
658 | } |
659 | ||
1da177e4 LT |
660 | static struct nfs4_state * |
661 | __nfs4_find_state_byowner(struct inode *inode, struct nfs4_state_owner *owner) | |
662 | { | |
663 | struct nfs_inode *nfsi = NFS_I(inode); | |
664 | struct nfs4_state *state; | |
665 | ||
666 | list_for_each_entry(state, &nfsi->open_states, inode_states) { | |
1c816efa | 667 | if (state->owner != owner) |
1da177e4 | 668 | continue; |
5d422301 TM |
669 | if (!nfs4_valid_open_stateid(state)) |
670 | continue; | |
1c816efa | 671 | if (atomic_inc_not_zero(&state->count)) |
1da177e4 | 672 | return state; |
1da177e4 LT |
673 | } |
674 | return NULL; | |
675 | } | |
676 | ||
1da177e4 LT |
677 | static void |
678 | nfs4_free_open_state(struct nfs4_state *state) | |
679 | { | |
680 | kfree(state); | |
681 | } | |
682 | ||
683 | struct nfs4_state * | |
684 | nfs4_get_open_state(struct inode *inode, struct nfs4_state_owner *owner) | |
685 | { | |
686 | struct nfs4_state *state, *new; | |
687 | struct nfs_inode *nfsi = NFS_I(inode); | |
688 | ||
689 | spin_lock(&inode->i_lock); | |
690 | state = __nfs4_find_state_byowner(inode, owner); | |
691 | spin_unlock(&inode->i_lock); | |
692 | if (state) | |
693 | goto out; | |
694 | new = nfs4_alloc_open_state(); | |
ec073428 | 695 | spin_lock(&owner->so_lock); |
1da177e4 LT |
696 | spin_lock(&inode->i_lock); |
697 | state = __nfs4_find_state_byowner(inode, owner); | |
698 | if (state == NULL && new != NULL) { | |
699 | state = new; | |
1da177e4 LT |
700 | state->owner = owner; |
701 | atomic_inc(&owner->so_count); | |
702 | list_add(&state->inode_states, &nfsi->open_states); | |
0444d76a DC |
703 | ihold(inode); |
704 | state->inode = inode; | |
1da177e4 | 705 | spin_unlock(&inode->i_lock); |
ec073428 TM |
706 | /* Note: The reclaim code dictates that we add stateless |
707 | * and read-only stateids to the end of the list */ | |
708 | list_add_tail(&state->open_states, &owner->so_states); | |
709 | spin_unlock(&owner->so_lock); | |
1da177e4 LT |
710 | } else { |
711 | spin_unlock(&inode->i_lock); | |
ec073428 | 712 | spin_unlock(&owner->so_lock); |
1da177e4 LT |
713 | if (new) |
714 | nfs4_free_open_state(new); | |
715 | } | |
716 | out: | |
717 | return state; | |
718 | } | |
719 | ||
1da177e4 LT |
720 | void nfs4_put_open_state(struct nfs4_state *state) |
721 | { | |
722 | struct inode *inode = state->inode; | |
723 | struct nfs4_state_owner *owner = state->owner; | |
724 | ||
ec073428 | 725 | if (!atomic_dec_and_lock(&state->count, &owner->so_lock)) |
1da177e4 | 726 | return; |
ec073428 | 727 | spin_lock(&inode->i_lock); |
ba683031 | 728 | list_del(&state->inode_states); |
1da177e4 | 729 | list_del(&state->open_states); |
ec073428 TM |
730 | spin_unlock(&inode->i_lock); |
731 | spin_unlock(&owner->so_lock); | |
1da177e4 | 732 | iput(inode); |
1da177e4 LT |
733 | nfs4_free_open_state(state); |
734 | nfs4_put_state_owner(owner); | |
735 | } | |
736 | ||
737 | /* | |
83c9d41e | 738 | * Close the current file. |
1da177e4 | 739 | */ |
643168c2 | 740 | static void __nfs4_close(struct nfs4_state *state, |
8535b2be | 741 | fmode_t fmode, gfp_t gfp_mask, int wait) |
1da177e4 | 742 | { |
1da177e4 | 743 | struct nfs4_state_owner *owner = state->owner; |
003707c7 | 744 | int call_close = 0; |
dc0b027d | 745 | fmode_t newstate; |
1da177e4 LT |
746 | |
747 | atomic_inc(&owner->so_count); | |
1da177e4 | 748 | /* Protect against nfs4_find_state() */ |
ec073428 | 749 | spin_lock(&owner->so_lock); |
dc0b027d | 750 | switch (fmode & (FMODE_READ | FMODE_WRITE)) { |
e7616923 TM |
751 | case FMODE_READ: |
752 | state->n_rdonly--; | |
753 | break; | |
754 | case FMODE_WRITE: | |
755 | state->n_wronly--; | |
756 | break; | |
757 | case FMODE_READ|FMODE_WRITE: | |
758 | state->n_rdwr--; | |
759 | } | |
003707c7 | 760 | newstate = FMODE_READ|FMODE_WRITE; |
e7616923 | 761 | if (state->n_rdwr == 0) { |
003707c7 | 762 | if (state->n_rdonly == 0) { |
e7616923 | 763 | newstate &= ~FMODE_READ; |
003707c7 TM |
764 | call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags); |
765 | call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); | |
766 | } | |
767 | if (state->n_wronly == 0) { | |
e7616923 | 768 | newstate &= ~FMODE_WRITE; |
003707c7 TM |
769 | call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags); |
770 | call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); | |
771 | } | |
772 | if (newstate == 0) | |
773 | clear_bit(NFS_DELEGATED_STATE, &state->flags); | |
e7616923 | 774 | } |
003707c7 | 775 | nfs4_state_set_mode_locked(state, newstate); |
ec073428 | 776 | spin_unlock(&owner->so_lock); |
4cecb76f | 777 | |
003707c7 | 778 | if (!call_close) { |
b39e625b TM |
779 | nfs4_put_open_state(state); |
780 | nfs4_put_state_owner(owner); | |
1f7977c1 TM |
781 | } else |
782 | nfs4_do_close(state, gfp_mask, wait); | |
a49c3c77 TM |
783 | } |
784 | ||
643168c2 | 785 | void nfs4_close_state(struct nfs4_state *state, fmode_t fmode) |
a49c3c77 | 786 | { |
643168c2 | 787 | __nfs4_close(state, fmode, GFP_NOFS, 0); |
a49c3c77 TM |
788 | } |
789 | ||
643168c2 | 790 | void nfs4_close_sync(struct nfs4_state *state, fmode_t fmode) |
a49c3c77 | 791 | { |
643168c2 | 792 | __nfs4_close(state, fmode, GFP_KERNEL, 1); |
1da177e4 LT |
793 | } |
794 | ||
795 | /* | |
796 | * Search the state->lock_states for an existing lock_owner | |
3f8f2548 N |
797 | * that is compatible with either of the given owners. |
798 | * If the second is non-zero, then the first refers to a Posix-lock | |
799 | * owner (current->files) and the second refers to a flock/OFD | |
800 | * owner (struct file*). In that case, prefer a match for the first | |
801 | * owner. | |
802 | * If both sorts of locks are held on the one file we cannot know | |
803 | * which stateid was intended to be used, so a "correct" choice cannot | |
804 | * be made. Failing that, a "consistent" choice is preferable. The | |
805 | * consistent choice we make is to prefer the first owner, that of a | |
806 | * Posix lock. | |
1da177e4 LT |
807 | */ |
808 | static struct nfs4_lock_state * | |
8d424431 N |
809 | __nfs4_find_lock_state(struct nfs4_state *state, |
810 | fl_owner_t fl_owner, fl_owner_t fl_owner2) | |
1da177e4 | 811 | { |
3f8f2548 | 812 | struct nfs4_lock_state *pos, *ret = NULL; |
1da177e4 | 813 | list_for_each_entry(pos, &state->lock_states, ls_locks) { |
3f8f2548 N |
814 | if (pos->ls_owner == fl_owner) { |
815 | ret = pos; | |
816 | break; | |
817 | } | |
818 | if (pos->ls_owner == fl_owner2) | |
819 | ret = pos; | |
1da177e4 | 820 | } |
3f8f2548 N |
821 | if (ret) |
822 | atomic_inc(&ret->ls_count); | |
823 | return ret; | |
1da177e4 LT |
824 | } |
825 | ||
1da177e4 LT |
826 | /* |
827 | * Return a compatible lock_state. If no initialized lock_state structure | |
828 | * exists, return an uninitialized one. | |
829 | * | |
1da177e4 | 830 | */ |
8003d3c4 | 831 | static struct nfs4_lock_state *nfs4_alloc_lock_state(struct nfs4_state *state, fl_owner_t fl_owner) |
1da177e4 LT |
832 | { |
833 | struct nfs4_lock_state *lsp; | |
24d292b8 | 834 | struct nfs_server *server = state->owner->so_server; |
1da177e4 | 835 | |
8535b2be | 836 | lsp = kzalloc(sizeof(*lsp), GFP_NOFS); |
1da177e4 LT |
837 | if (lsp == NULL) |
838 | return NULL; | |
7ba127ab | 839 | nfs4_init_seqid_counter(&lsp->ls_seqid); |
1da177e4 | 840 | atomic_set(&lsp->ls_count, 1); |
b64aec8d | 841 | lsp->ls_state = state; |
8003d3c4 | 842 | lsp->ls_owner = fl_owner; |
48c22eb2 TM |
843 | lsp->ls_seqid.owner_id = ida_simple_get(&server->lockowner_id, 0, 0, GFP_NOFS); |
844 | if (lsp->ls_seqid.owner_id < 0) | |
d2d7ce28 | 845 | goto out_free; |
8d0a8a9d | 846 | INIT_LIST_HEAD(&lsp->ls_locks); |
1da177e4 | 847 | return lsp; |
d2d7ce28 TM |
848 | out_free: |
849 | kfree(lsp); | |
850 | return NULL; | |
1da177e4 LT |
851 | } |
852 | ||
5ae67c4f | 853 | void nfs4_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp) |
9f958ab8 | 854 | { |
48c22eb2 | 855 | ida_simple_remove(&server->lockowner_id, lsp->ls_seqid.owner_id); |
7ba127ab | 856 | nfs4_destroy_seqid_counter(&lsp->ls_seqid); |
9f958ab8 TM |
857 | kfree(lsp); |
858 | } | |
859 | ||
1da177e4 LT |
860 | /* |
861 | * Return a compatible lock_state. If no initialized lock_state structure | |
862 | * exists, return an uninitialized one. | |
863 | * | |
1da177e4 | 864 | */ |
8003d3c4 | 865 | static struct nfs4_lock_state *nfs4_get_lock_state(struct nfs4_state *state, fl_owner_t owner) |
1da177e4 | 866 | { |
8d0a8a9d | 867 | struct nfs4_lock_state *lsp, *new = NULL; |
1da177e4 | 868 | |
8d0a8a9d TM |
869 | for(;;) { |
870 | spin_lock(&state->state_lock); | |
8d424431 | 871 | lsp = __nfs4_find_lock_state(state, owner, 0); |
8d0a8a9d TM |
872 | if (lsp != NULL) |
873 | break; | |
874 | if (new != NULL) { | |
8d0a8a9d TM |
875 | list_add(&new->ls_locks, &state->lock_states); |
876 | set_bit(LK_STATE_IN_USE, &state->flags); | |
877 | lsp = new; | |
878 | new = NULL; | |
879 | break; | |
880 | } | |
881 | spin_unlock(&state->state_lock); | |
8003d3c4 | 882 | new = nfs4_alloc_lock_state(state, owner); |
8d0a8a9d TM |
883 | if (new == NULL) |
884 | return NULL; | |
885 | } | |
886 | spin_unlock(&state->state_lock); | |
9f958ab8 | 887 | if (new != NULL) |
5ae67c4f | 888 | nfs4_free_lock_state(state->owner->so_server, new); |
1da177e4 LT |
889 | return lsp; |
890 | } | |
891 | ||
892 | /* | |
8d0a8a9d TM |
893 | * Release reference to lock_state, and free it if we see that |
894 | * it is no longer in use | |
1da177e4 | 895 | */ |
faf5f49c | 896 | void nfs4_put_lock_state(struct nfs4_lock_state *lsp) |
1da177e4 | 897 | { |
c8b2d0bf | 898 | struct nfs_server *server; |
8d0a8a9d | 899 | struct nfs4_state *state; |
1da177e4 | 900 | |
8d0a8a9d TM |
901 | if (lsp == NULL) |
902 | return; | |
903 | state = lsp->ls_state; | |
904 | if (!atomic_dec_and_lock(&lsp->ls_count, &state->state_lock)) | |
905 | return; | |
906 | list_del(&lsp->ls_locks); | |
907 | if (list_empty(&state->lock_states)) | |
908 | clear_bit(LK_STATE_IN_USE, &state->flags); | |
909 | spin_unlock(&state->state_lock); | |
0c0e0d3c JL |
910 | server = state->owner->so_server; |
911 | if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) { | |
912 | struct nfs_client *clp = server->nfs_client; | |
913 | ||
914 | clp->cl_mvops->free_lock_state(server, lsp); | |
915 | } else | |
c8b2d0bf | 916 | nfs4_free_lock_state(server, lsp); |
1da177e4 LT |
917 | } |
918 | ||
8d0a8a9d | 919 | static void nfs4_fl_copy_lock(struct file_lock *dst, struct file_lock *src) |
1da177e4 | 920 | { |
8d0a8a9d | 921 | struct nfs4_lock_state *lsp = src->fl_u.nfs4_fl.owner; |
1da177e4 | 922 | |
8d0a8a9d TM |
923 | dst->fl_u.nfs4_fl.owner = lsp; |
924 | atomic_inc(&lsp->ls_count); | |
925 | } | |
1da177e4 | 926 | |
8d0a8a9d | 927 | static void nfs4_fl_release_lock(struct file_lock *fl) |
1da177e4 | 928 | { |
8d0a8a9d | 929 | nfs4_put_lock_state(fl->fl_u.nfs4_fl.owner); |
1da177e4 LT |
930 | } |
931 | ||
6aed6285 | 932 | static const struct file_lock_operations nfs4_fl_lock_ops = { |
8d0a8a9d TM |
933 | .fl_copy_lock = nfs4_fl_copy_lock, |
934 | .fl_release_private = nfs4_fl_release_lock, | |
935 | }; | |
936 | ||
937 | int nfs4_set_lock_state(struct nfs4_state *state, struct file_lock *fl) | |
1da177e4 | 938 | { |
8d0a8a9d TM |
939 | struct nfs4_lock_state *lsp; |
940 | ||
941 | if (fl->fl_ops != NULL) | |
942 | return 0; | |
8003d3c4 | 943 | lsp = nfs4_get_lock_state(state, fl->fl_owner); |
8d0a8a9d TM |
944 | if (lsp == NULL) |
945 | return -ENOMEM; | |
946 | fl->fl_u.nfs4_fl.owner = lsp; | |
947 | fl->fl_ops = &nfs4_fl_lock_ops; | |
948 | return 0; | |
1da177e4 LT |
949 | } |
950 | ||
5521abfd TM |
951 | static int nfs4_copy_lock_stateid(nfs4_stateid *dst, |
952 | struct nfs4_state *state, | |
17393475 | 953 | const struct nfs_lock_context *l_ctx) |
1da177e4 | 954 | { |
8d0a8a9d | 955 | struct nfs4_lock_state *lsp; |
8d424431 | 956 | fl_owner_t fl_owner, fl_flock_owner; |
5521abfd | 957 | int ret = -ENOENT; |
1da177e4 | 958 | |
17393475 | 959 | if (l_ctx == NULL) |
2a369153 TM |
960 | goto out; |
961 | ||
8d0a8a9d | 962 | if (test_bit(LK_STATE_IN_USE, &state->flags) == 0) |
4fc8796d | 963 | goto out; |
1da177e4 | 964 | |
d51fdb87 | 965 | fl_owner = l_ctx->lockowner; |
8d424431 N |
966 | fl_flock_owner = l_ctx->open_context->flock_owner; |
967 | ||
8d0a8a9d | 968 | spin_lock(&state->state_lock); |
8d424431 | 969 | lsp = __nfs4_find_lock_state(state, fl_owner, fl_flock_owner); |
ef1820f9 N |
970 | if (lsp && test_bit(NFS_LOCK_LOST, &lsp->ls_flags)) |
971 | ret = -EIO; | |
972 | else if (lsp != NULL && test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0) { | |
f597c537 | 973 | nfs4_stateid_copy(dst, &lsp->ls_stateid); |
5521abfd | 974 | ret = 0; |
4fc8796d | 975 | } |
8d0a8a9d | 976 | spin_unlock(&state->state_lock); |
1da177e4 | 977 | nfs4_put_lock_state(lsp); |
4fc8796d TM |
978 | out: |
979 | return ret; | |
980 | } | |
981 | ||
927864cd | 982 | static void nfs4_copy_open_stateid(nfs4_stateid *dst, struct nfs4_state *state) |
4fc8796d | 983 | { |
92b40e93 | 984 | const nfs4_stateid *src; |
4fc8796d TM |
985 | int seq; |
986 | ||
987 | do { | |
92b40e93 | 988 | src = &zero_stateid; |
4fc8796d | 989 | seq = read_seqbegin(&state->seqlock); |
92b40e93 TM |
990 | if (test_bit(NFS_OPEN_STATE, &state->flags)) |
991 | src = &state->open_stateid; | |
992 | nfs4_stateid_copy(dst, src); | |
4fc8796d TM |
993 | } while (read_seqretry(&state->seqlock, seq)); |
994 | } | |
995 | ||
996 | /* | |
997 | * Byte-range lock aware utility to initialize the stateid of read/write | |
998 | * requests. | |
999 | */ | |
abf4e13c | 1000 | int nfs4_select_rw_stateid(struct nfs4_state *state, |
17393475 | 1001 | fmode_t fmode, const struct nfs_lock_context *l_ctx, |
abf4e13c | 1002 | nfs4_stateid *dst, struct rpc_cred **cred) |
4fc8796d | 1003 | { |
abf4e13c TM |
1004 | int ret; |
1005 | ||
7ebeb7fe TM |
1006 | if (!nfs4_valid_open_stateid(state)) |
1007 | return -EIO; | |
abf4e13c TM |
1008 | if (cred != NULL) |
1009 | *cred = NULL; | |
17393475 | 1010 | ret = nfs4_copy_lock_stateid(dst, state, l_ctx); |
ef1820f9 N |
1011 | if (ret == -EIO) |
1012 | /* A lost lock - don't even consider delegations */ | |
1013 | goto out; | |
146d70ca | 1014 | /* returns true if delegation stateid found and copied */ |
abf4e13c | 1015 | if (nfs4_copy_delegation_stateid(state->inode, fmode, dst, cred)) { |
146d70ca | 1016 | ret = 0; |
5521abfd | 1017 | goto out; |
146d70ca | 1018 | } |
5521abfd | 1019 | if (ret != -ENOENT) |
ef1820f9 N |
1020 | /* nfs4_copy_delegation_stateid() didn't over-write |
1021 | * dst, so it still has the lock stateid which we now | |
1022 | * choose to use. | |
1023 | */ | |
5521abfd | 1024 | goto out; |
927864cd TM |
1025 | nfs4_copy_open_stateid(dst, state); |
1026 | ret = 0; | |
5521abfd | 1027 | out: |
3b66486c TM |
1028 | if (nfs_server_capable(state->inode, NFS_CAP_STATEID_NFSV41)) |
1029 | dst->seqid = 0; | |
5521abfd | 1030 | return ret; |
1da177e4 LT |
1031 | } |
1032 | ||
8535b2be | 1033 | struct nfs_seqid *nfs_alloc_seqid(struct nfs_seqid_counter *counter, gfp_t gfp_mask) |
cee54fc9 | 1034 | { |
cee54fc9 TM |
1035 | struct nfs_seqid *new; |
1036 | ||
8535b2be | 1037 | new = kmalloc(sizeof(*new), gfp_mask); |
badc76dd TM |
1038 | if (new == NULL) |
1039 | return ERR_PTR(-ENOMEM); | |
1040 | new->sequence = counter; | |
1041 | INIT_LIST_HEAD(&new->list); | |
1042 | new->task = NULL; | |
cee54fc9 TM |
1043 | return new; |
1044 | } | |
1045 | ||
72211dbe | 1046 | void nfs_release_seqid(struct nfs_seqid *seqid) |
1da177e4 | 1047 | { |
4601df20 | 1048 | struct nfs_seqid_counter *sequence; |
cee54fc9 | 1049 | |
a6796419 | 1050 | if (seqid == NULL || list_empty(&seqid->list)) |
4601df20 TM |
1051 | return; |
1052 | sequence = seqid->sequence; | |
1053 | spin_lock(&sequence->lock); | |
1054 | list_del_init(&seqid->list); | |
1055 | if (!list_empty(&sequence->list)) { | |
1056 | struct nfs_seqid *next; | |
1057 | ||
1058 | next = list_first_entry(&sequence->list, | |
1059 | struct nfs_seqid, list); | |
1060 | rpc_wake_up_queued_task(&sequence->wait, next->task); | |
2f74c0a0 | 1061 | } |
4601df20 | 1062 | spin_unlock(&sequence->lock); |
72211dbe TM |
1063 | } |
1064 | ||
1065 | void nfs_free_seqid(struct nfs_seqid *seqid) | |
1066 | { | |
1067 | nfs_release_seqid(seqid); | |
cee54fc9 | 1068 | kfree(seqid); |
1da177e4 LT |
1069 | } |
1070 | ||
1071 | /* | |
cee54fc9 TM |
1072 | * Increment the seqid if the OPEN/OPEN_DOWNGRADE/CLOSE succeeded, or |
1073 | * failed with a seqid incrementing error - | |
16a6ddc7 | 1074 | * see comments nfs4.h:seqid_mutating_error() |
cee54fc9 | 1075 | */ |
88d90939 | 1076 | static void nfs_increment_seqid(int status, struct nfs_seqid *seqid) |
cee54fc9 TM |
1077 | { |
1078 | switch (status) { | |
1079 | case 0: | |
1080 | break; | |
1081 | case -NFS4ERR_BAD_SEQID: | |
6f43ddcc TM |
1082 | if (seqid->sequence->flags & NFS_SEQID_CONFIRMED) |
1083 | return; | |
9a3ba432 | 1084 | pr_warn_ratelimited("NFS: v4 server returned a bad" |
497799e7 DM |
1085 | " sequence-id error on an" |
1086 | " unconfirmed sequence %p!\n", | |
6f43ddcc | 1087 | seqid->sequence); |
cee54fc9 TM |
1088 | case -NFS4ERR_STALE_CLIENTID: |
1089 | case -NFS4ERR_STALE_STATEID: | |
1090 | case -NFS4ERR_BAD_STATEID: | |
1091 | case -NFS4ERR_BADXDR: | |
1092 | case -NFS4ERR_RESOURCE: | |
1093 | case -NFS4ERR_NOFILEHANDLE: | |
1094 | /* Non-seqid mutating errors */ | |
1095 | return; | |
1096 | }; | |
1097 | /* | |
1098 | * Note: no locking needed as we are guaranteed to be first | |
1099 | * on the sequence list | |
1100 | */ | |
1101 | seqid->sequence->counter++; | |
1102 | } | |
1103 | ||
1104 | void nfs_increment_open_seqid(int status, struct nfs_seqid *seqid) | |
1105 | { | |
a6796419 TM |
1106 | struct nfs4_state_owner *sp; |
1107 | ||
1108 | if (seqid == NULL) | |
1109 | return; | |
34dc1ad7 | 1110 | |
a6796419 | 1111 | sp = container_of(seqid->sequence, struct nfs4_state_owner, so_seqid); |
34dc1ad7 | 1112 | if (status == -NFS4ERR_BAD_SEQID) |
86cfb041 | 1113 | nfs4_reset_state_owner(sp); |
a6796419 | 1114 | if (!nfs4_has_session(sp->so_server->nfs_client)) |
34dc1ad7 | 1115 | nfs_increment_seqid(status, seqid); |
cee54fc9 TM |
1116 | } |
1117 | ||
1118 | /* | |
cee54fc9 TM |
1119 | * Increment the seqid if the LOCK/LOCKU succeeded, or |
1120 | * failed with a seqid incrementing error - | |
16a6ddc7 | 1121 | * see comments nfs4.h:seqid_mutating_error() |
cee54fc9 TM |
1122 | */ |
1123 | void nfs_increment_lock_seqid(int status, struct nfs_seqid *seqid) | |
1124 | { | |
a6796419 TM |
1125 | if (seqid != NULL) |
1126 | nfs_increment_seqid(status, seqid); | |
cee54fc9 TM |
1127 | } |
1128 | ||
1129 | int nfs_wait_on_sequence(struct nfs_seqid *seqid, struct rpc_task *task) | |
1130 | { | |
a6796419 | 1131 | struct nfs_seqid_counter *sequence; |
cee54fc9 TM |
1132 | int status = 0; |
1133 | ||
a6796419 TM |
1134 | if (seqid == NULL) |
1135 | goto out; | |
1136 | sequence = seqid->sequence; | |
cee54fc9 | 1137 | spin_lock(&sequence->lock); |
4601df20 | 1138 | seqid->task = task; |
2f74c0a0 TM |
1139 | if (list_empty(&seqid->list)) |
1140 | list_add_tail(&seqid->list, &sequence->list); | |
1141 | if (list_first_entry(&sequence->list, struct nfs_seqid, list) == seqid) | |
1142 | goto unlock; | |
5d00837b | 1143 | rpc_sleep_on(&sequence->wait, task, NULL); |
2f74c0a0 TM |
1144 | status = -EAGAIN; |
1145 | unlock: | |
cee54fc9 | 1146 | spin_unlock(&sequence->lock); |
a6796419 | 1147 | out: |
cee54fc9 | 1148 | return status; |
1da177e4 LT |
1149 | } |
1150 | ||
e005e804 | 1151 | static int nfs4_run_state_manager(void *); |
1da177e4 | 1152 | |
e005e804 | 1153 | static void nfs4_clear_state_manager_bit(struct nfs_client *clp) |
433fbe4c | 1154 | { |
4e857c58 | 1155 | smp_mb__before_atomic(); |
e005e804 | 1156 | clear_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state); |
4e857c58 | 1157 | smp_mb__after_atomic(); |
e005e804 | 1158 | wake_up_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING); |
433fbe4c TM |
1159 | rpc_wake_up(&clp->cl_rpcwaitq); |
1160 | } | |
1161 | ||
1da177e4 | 1162 | /* |
e005e804 | 1163 | * Schedule the nfs_client asynchronous state management routine |
1da177e4 | 1164 | */ |
b0d3ded1 | 1165 | void nfs4_schedule_state_manager(struct nfs_client *clp) |
1da177e4 | 1166 | { |
5043e900 | 1167 | struct task_struct *task; |
2446ab60 | 1168 | char buf[INET6_ADDRSTRLEN + sizeof("-manager") + 1]; |
1da177e4 | 1169 | |
e005e804 TM |
1170 | if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) != 0) |
1171 | return; | |
5043e900 TM |
1172 | __module_get(THIS_MODULE); |
1173 | atomic_inc(&clp->cl_count); | |
2446ab60 TM |
1174 | |
1175 | /* The rcu_read_lock() is not strictly necessary, as the state | |
1176 | * manager is the only thread that ever changes the rpc_xprt | |
1177 | * after it's initialized. At this point, we're single threaded. */ | |
1178 | rcu_read_lock(); | |
1179 | snprintf(buf, sizeof(buf), "%s-manager", | |
1180 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)); | |
1181 | rcu_read_unlock(); | |
f170168b | 1182 | task = kthread_run(nfs4_run_state_manager, clp, "%s", buf); |
2446ab60 TM |
1183 | if (IS_ERR(task)) { |
1184 | printk(KERN_ERR "%s: kthread_run: %ld\n", | |
1185 | __func__, PTR_ERR(task)); | |
1186 | nfs4_clear_state_manager_bit(clp); | |
1187 | nfs_put_client(clp); | |
1188 | module_put(THIS_MODULE); | |
1189 | } | |
1da177e4 LT |
1190 | } |
1191 | ||
1192 | /* | |
0400a6b0 | 1193 | * Schedule a lease recovery attempt |
1da177e4 | 1194 | */ |
0400a6b0 | 1195 | void nfs4_schedule_lease_recovery(struct nfs_client *clp) |
1da177e4 LT |
1196 | { |
1197 | if (!clp) | |
1198 | return; | |
e598d843 TM |
1199 | if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
1200 | set_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); | |
cc0a9843 TM |
1201 | dprintk("%s: scheduling lease recovery for server %s\n", __func__, |
1202 | clp->cl_hostname); | |
e005e804 | 1203 | nfs4_schedule_state_manager(clp); |
1da177e4 | 1204 | } |
9cb81968 | 1205 | EXPORT_SYMBOL_GPL(nfs4_schedule_lease_recovery); |
1da177e4 | 1206 | |
c9fdeb28 CL |
1207 | /** |
1208 | * nfs4_schedule_migration_recovery - trigger migration recovery | |
1209 | * | |
1210 | * @server: FSID that is migrating | |
1211 | * | |
1212 | * Returns zero if recovery has started, otherwise a negative NFS4ERR | |
1213 | * value is returned. | |
1214 | */ | |
1215 | int nfs4_schedule_migration_recovery(const struct nfs_server *server) | |
1216 | { | |
1217 | struct nfs_client *clp = server->nfs_client; | |
1218 | ||
1219 | if (server->fh_expire_type != NFS4_FH_PERSISTENT) { | |
1220 | pr_err("NFS: volatile file handles not supported (server %s)\n", | |
1221 | clp->cl_hostname); | |
1222 | return -NFS4ERR_IO; | |
1223 | } | |
1224 | ||
1225 | if (test_bit(NFS_MIG_FAILED, &server->mig_status)) | |
1226 | return -NFS4ERR_IO; | |
1227 | ||
1228 | dprintk("%s: scheduling migration recovery for (%llx:%llx) on %s\n", | |
1229 | __func__, | |
1230 | (unsigned long long)server->fsid.major, | |
1231 | (unsigned long long)server->fsid.minor, | |
1232 | clp->cl_hostname); | |
1233 | ||
1234 | set_bit(NFS_MIG_IN_TRANSITION, | |
1235 | &((struct nfs_server *)server)->mig_status); | |
1236 | set_bit(NFS4CLNT_MOVED, &clp->cl_state); | |
1237 | ||
1238 | nfs4_schedule_state_manager(clp); | |
1239 | return 0; | |
1240 | } | |
1241 | EXPORT_SYMBOL_GPL(nfs4_schedule_migration_recovery); | |
1242 | ||
b7f7a66e CL |
1243 | /** |
1244 | * nfs4_schedule_lease_moved_recovery - start lease-moved recovery | |
1245 | * | |
1246 | * @clp: server to check for moved leases | |
1247 | * | |
1248 | */ | |
1249 | void nfs4_schedule_lease_moved_recovery(struct nfs_client *clp) | |
1250 | { | |
1251 | dprintk("%s: scheduling lease-moved recovery for client ID %llx on %s\n", | |
1252 | __func__, clp->cl_clientid, clp->cl_hostname); | |
1253 | ||
1254 | set_bit(NFS4CLNT_LEASE_MOVED, &clp->cl_state); | |
1255 | nfs4_schedule_state_manager(clp); | |
1256 | } | |
1257 | EXPORT_SYMBOL_GPL(nfs4_schedule_lease_moved_recovery); | |
1258 | ||
33021279 TM |
1259 | int nfs4_wait_clnt_recover(struct nfs_client *clp) |
1260 | { | |
1261 | int res; | |
1262 | ||
1263 | might_sleep(); | |
1264 | ||
0625c2dd | 1265 | atomic_inc(&clp->cl_count); |
74316201 N |
1266 | res = wait_on_bit_action(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING, |
1267 | nfs_wait_bit_killable, TASK_KILLABLE); | |
33021279 | 1268 | if (res) |
0625c2dd | 1269 | goto out; |
33021279 | 1270 | if (clp->cl_cons_state < 0) |
0625c2dd CL |
1271 | res = clp->cl_cons_state; |
1272 | out: | |
1273 | nfs_put_client(clp); | |
1274 | return res; | |
33021279 TM |
1275 | } |
1276 | ||
1277 | int nfs4_client_recover_expired_lease(struct nfs_client *clp) | |
1278 | { | |
1279 | unsigned int loop; | |
1280 | int ret; | |
1281 | ||
1282 | for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) { | |
1283 | ret = nfs4_wait_clnt_recover(clp); | |
1284 | if (ret != 0) | |
1285 | break; | |
1286 | if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) && | |
1287 | !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state)) | |
1288 | break; | |
1289 | nfs4_schedule_state_manager(clp); | |
1290 | ret = -EIO; | |
1291 | } | |
1292 | return ret; | |
1293 | } | |
1294 | ||
ad1e3968 TM |
1295 | /* |
1296 | * nfs40_handle_cb_pathdown - return all delegations after NFS4ERR_CB_PATH_DOWN | |
1297 | * @clp: client to process | |
1298 | * | |
1299 | * Set the NFS4CLNT_LEASE_EXPIRED state in order to force a | |
1300 | * resend of the SETCLIENTID and hence re-establish the | |
1301 | * callback channel. Then return all existing delegations. | |
1302 | */ | |
1303 | static void nfs40_handle_cb_pathdown(struct nfs_client *clp) | |
1304 | { | |
1305 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1306 | nfs_expire_all_delegations(clp); | |
cc0a9843 TM |
1307 | dprintk("%s: handling CB_PATHDOWN recovery for server %s\n", __func__, |
1308 | clp->cl_hostname); | |
ad1e3968 TM |
1309 | } |
1310 | ||
042b60be TM |
1311 | void nfs4_schedule_path_down_recovery(struct nfs_client *clp) |
1312 | { | |
ad1e3968 | 1313 | nfs40_handle_cb_pathdown(clp); |
042b60be TM |
1314 | nfs4_schedule_state_manager(clp); |
1315 | } | |
1316 | ||
f9feab1e | 1317 | static int nfs4_state_mark_reclaim_reboot(struct nfs_client *clp, struct nfs4_state *state) |
b79a4a1b TM |
1318 | { |
1319 | ||
7ebeb7fe TM |
1320 | if (!nfs4_valid_open_stateid(state)) |
1321 | return 0; | |
b79a4a1b TM |
1322 | set_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); |
1323 | /* Don't recover state that expired before the reboot */ | |
1324 | if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) { | |
1325 | clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); | |
1326 | return 0; | |
1327 | } | |
7eff03ae | 1328 | set_bit(NFS_OWNER_RECLAIM_REBOOT, &state->owner->so_flags); |
b79a4a1b TM |
1329 | set_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state); |
1330 | return 1; | |
1331 | } | |
1332 | ||
4f14c194 | 1333 | int nfs4_state_mark_reclaim_nograce(struct nfs_client *clp, struct nfs4_state *state) |
b79a4a1b | 1334 | { |
7ebeb7fe TM |
1335 | if (!nfs4_valid_open_stateid(state)) |
1336 | return 0; | |
b79a4a1b TM |
1337 | set_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags); |
1338 | clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); | |
7eff03ae | 1339 | set_bit(NFS_OWNER_RECLAIM_NOGRACE, &state->owner->so_flags); |
b79a4a1b TM |
1340 | set_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state); |
1341 | return 1; | |
1342 | } | |
1343 | ||
5d422301 | 1344 | int nfs4_schedule_stateid_recovery(const struct nfs_server *server, struct nfs4_state *state) |
0400a6b0 TM |
1345 | { |
1346 | struct nfs_client *clp = server->nfs_client; | |
1347 | ||
7ebeb7fe | 1348 | if (!nfs4_state_mark_reclaim_nograce(clp, state)) |
5d422301 | 1349 | return -EBADF; |
cc0a9843 TM |
1350 | dprintk("%s: scheduling stateid recovery for server %s\n", __func__, |
1351 | clp->cl_hostname); | |
0400a6b0 | 1352 | nfs4_schedule_state_manager(clp); |
5d422301 | 1353 | return 0; |
0400a6b0 | 1354 | } |
9cb81968 | 1355 | EXPORT_SYMBOL_GPL(nfs4_schedule_stateid_recovery); |
0400a6b0 | 1356 | |
6c2d8f8d TM |
1357 | static struct nfs4_lock_state * |
1358 | nfs_state_find_lock_state_by_stateid(struct nfs4_state *state, | |
1359 | const nfs4_stateid *stateid) | |
1360 | { | |
1361 | struct nfs4_lock_state *pos; | |
1362 | ||
1363 | list_for_each_entry(pos, &state->lock_states, ls_locks) { | |
1364 | if (!test_bit(NFS_LOCK_INITIALIZED, &pos->ls_flags)) | |
1365 | continue; | |
1366 | if (nfs4_stateid_match_other(&pos->ls_stateid, stateid)) | |
1367 | return pos; | |
1368 | } | |
1369 | return NULL; | |
1370 | } | |
1371 | ||
1372 | static bool nfs_state_lock_state_matches_stateid(struct nfs4_state *state, | |
1373 | const nfs4_stateid *stateid) | |
1374 | { | |
1375 | bool found = false; | |
1376 | ||
1377 | if (test_bit(LK_STATE_IN_USE, &state->flags)) { | |
1378 | spin_lock(&state->state_lock); | |
1379 | if (nfs_state_find_lock_state_by_stateid(state, stateid)) | |
1380 | found = true; | |
1381 | spin_unlock(&state->state_lock); | |
1382 | } | |
1383 | return found; | |
1384 | } | |
1385 | ||
a1d0b5ee TM |
1386 | void nfs_inode_find_state_and_recover(struct inode *inode, |
1387 | const nfs4_stateid *stateid) | |
1388 | { | |
1389 | struct nfs_client *clp = NFS_SERVER(inode)->nfs_client; | |
1390 | struct nfs_inode *nfsi = NFS_I(inode); | |
1391 | struct nfs_open_context *ctx; | |
1392 | struct nfs4_state *state; | |
1393 | bool found = false; | |
1394 | ||
1395 | spin_lock(&inode->i_lock); | |
1396 | list_for_each_entry(ctx, &nfsi->open_files, list) { | |
1397 | state = ctx->state; | |
1398 | if (state == NULL) | |
1399 | continue; | |
7ebeb7fe TM |
1400 | if (nfs4_stateid_match_other(&state->stateid, stateid) && |
1401 | nfs4_state_mark_reclaim_nograce(clp, state)) { | |
6c2d8f8d | 1402 | found = true; |
a1d0b5ee | 1403 | continue; |
6c2d8f8d | 1404 | } |
7ebeb7fe TM |
1405 | if (nfs_state_lock_state_matches_stateid(state, stateid) && |
1406 | nfs4_state_mark_reclaim_nograce(clp, state)) | |
6c2d8f8d | 1407 | found = true; |
a1d0b5ee TM |
1408 | } |
1409 | spin_unlock(&inode->i_lock); | |
6c2d8f8d TM |
1410 | |
1411 | nfs_inode_find_delegation_state_and_recover(inode, stateid); | |
a1d0b5ee TM |
1412 | if (found) |
1413 | nfs4_schedule_state_manager(clp); | |
1414 | } | |
1415 | ||
c58c8441 TM |
1416 | static void nfs4_state_mark_open_context_bad(struct nfs4_state *state) |
1417 | { | |
1418 | struct inode *inode = state->inode; | |
1419 | struct nfs_inode *nfsi = NFS_I(inode); | |
1420 | struct nfs_open_context *ctx; | |
1421 | ||
1422 | spin_lock(&inode->i_lock); | |
1423 | list_for_each_entry(ctx, &nfsi->open_files, list) { | |
1424 | if (ctx->state != state) | |
1425 | continue; | |
1426 | set_bit(NFS_CONTEXT_BAD, &ctx->flags); | |
1427 | } | |
1428 | spin_unlock(&inode->i_lock); | |
1429 | } | |
1430 | ||
5d422301 TM |
1431 | static void nfs4_state_mark_recovery_failed(struct nfs4_state *state, int error) |
1432 | { | |
1433 | set_bit(NFS_STATE_RECOVERY_FAILED, &state->flags); | |
c58c8441 | 1434 | nfs4_state_mark_open_context_bad(state); |
5d422301 TM |
1435 | } |
1436 | ||
a1d0b5ee | 1437 | |
02860014 | 1438 | static int nfs4_reclaim_locks(struct nfs4_state *state, const struct nfs4_state_recovery_ops *ops) |
1da177e4 LT |
1439 | { |
1440 | struct inode *inode = state->inode; | |
19e03c57 | 1441 | struct nfs_inode *nfsi = NFS_I(inode); |
1da177e4 LT |
1442 | struct file_lock *fl; |
1443 | int status = 0; | |
5263e31e | 1444 | struct file_lock_context *flctx = inode->i_flctx; |
bd61e0a9 | 1445 | struct list_head *list; |
1da177e4 | 1446 | |
bd61e0a9 | 1447 | if (flctx == NULL) |
3f09df70 TM |
1448 | return 0; |
1449 | ||
bd61e0a9 JL |
1450 | list = &flctx->flc_posix; |
1451 | ||
3f09df70 | 1452 | /* Guard against delegation returns and new lock/unlock calls */ |
19e03c57 | 1453 | down_write(&nfsi->rwsem); |
6109c850 | 1454 | spin_lock(&flctx->flc_lock); |
bd61e0a9 JL |
1455 | restart: |
1456 | list_for_each_entry(fl, list, fl_list) { | |
5263e31e JL |
1457 | if (nfs_file_open_context(fl->fl_file)->state != state) |
1458 | continue; | |
6109c850 | 1459 | spin_unlock(&flctx->flc_lock); |
5263e31e JL |
1460 | status = ops->recover_lock(state, fl); |
1461 | switch (status) { | |
1462 | case 0: | |
1463 | break; | |
1464 | case -ESTALE: | |
1465 | case -NFS4ERR_ADMIN_REVOKED: | |
1466 | case -NFS4ERR_STALE_STATEID: | |
1467 | case -NFS4ERR_BAD_STATEID: | |
1468 | case -NFS4ERR_EXPIRED: | |
1469 | case -NFS4ERR_NO_GRACE: | |
1470 | case -NFS4ERR_STALE_CLIENTID: | |
1471 | case -NFS4ERR_BADSESSION: | |
1472 | case -NFS4ERR_BADSLOT: | |
1473 | case -NFS4ERR_BAD_HIGH_SLOT: | |
1474 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
1475 | goto out; | |
1476 | default: | |
1477 | pr_err("NFS: %s: unhandled error %d\n", | |
1478 | __func__, status); | |
1479 | case -ENOMEM: | |
1480 | case -NFS4ERR_DENIED: | |
1481 | case -NFS4ERR_RECLAIM_BAD: | |
1482 | case -NFS4ERR_RECLAIM_CONFLICT: | |
1483 | /* kill_proc(fl->fl_pid, SIGLOST, 1); */ | |
1484 | status = 0; | |
1485 | } | |
6109c850 | 1486 | spin_lock(&flctx->flc_lock); |
5263e31e | 1487 | } |
bd61e0a9 JL |
1488 | if (list == &flctx->flc_posix) { |
1489 | list = &flctx->flc_flock; | |
1490 | goto restart; | |
1491 | } | |
6109c850 | 1492 | spin_unlock(&flctx->flc_lock); |
965b5d67 | 1493 | out: |
19e03c57 | 1494 | up_write(&nfsi->rwsem); |
1da177e4 LT |
1495 | return status; |
1496 | } | |
1497 | ||
02860014 | 1498 | static int nfs4_reclaim_open_state(struct nfs4_state_owner *sp, const struct nfs4_state_recovery_ops *ops) |
1da177e4 LT |
1499 | { |
1500 | struct nfs4_state *state; | |
1501 | struct nfs4_lock_state *lock; | |
1502 | int status = 0; | |
1503 | ||
1504 | /* Note: we rely on the sp->so_states list being ordered | |
1505 | * so that we always reclaim open(O_RDWR) and/or open(O_WRITE) | |
1506 | * states first. | |
1507 | * This is needed to ensure that the server won't give us any | |
1508 | * read delegations that we have to return if, say, we are | |
1509 | * recovering after a network partition or a reboot from a | |
1510 | * server that doesn't support a grace period. | |
1511 | */ | |
fe1d8195 | 1512 | spin_lock(&sp->so_lock); |
abbec2da | 1513 | raw_write_seqcount_begin(&sp->so_reclaim_seqcount); |
c137afab | 1514 | restart: |
1da177e4 | 1515 | list_for_each_entry(state, &sp->so_states, open_states) { |
b79a4a1b TM |
1516 | if (!test_and_clear_bit(ops->state_flag_bit, &state->flags)) |
1517 | continue; | |
5d422301 TM |
1518 | if (!nfs4_valid_open_stateid(state)) |
1519 | continue; | |
1da177e4 LT |
1520 | if (state->state == 0) |
1521 | continue; | |
fe1d8195 TM |
1522 | atomic_inc(&state->count); |
1523 | spin_unlock(&sp->so_lock); | |
1da177e4 | 1524 | status = ops->recover_open(sp, state); |
1da177e4 | 1525 | if (status >= 0) { |
02860014 TM |
1526 | status = nfs4_reclaim_locks(state, ops); |
1527 | if (status >= 0) { | |
1acd1c30 | 1528 | if (!test_bit(NFS_DELEGATED_STATE, &state->flags)) { |
6686390b N |
1529 | spin_lock(&state->state_lock); |
1530 | list_for_each_entry(lock, &state->lock_states, ls_locks) { | |
1531 | if (!test_bit(NFS_LOCK_INITIALIZED, &lock->ls_flags)) | |
1532 | pr_warn_ratelimited("NFS: " | |
1533 | "%s: Lock reclaim " | |
1534 | "failed!\n", __func__); | |
1535 | } | |
1536 | spin_unlock(&state->state_lock); | |
02860014 | 1537 | } |
a41cbe86 | 1538 | clear_bit(NFS_STATE_RECLAIM_NOGRACE, |
e8d975e7 | 1539 | &state->flags); |
cea7f829 | 1540 | nfs4_put_open_state(state); |
c137afab | 1541 | spin_lock(&sp->so_lock); |
fe1d8195 | 1542 | goto restart; |
1da177e4 | 1543 | } |
1da177e4 LT |
1544 | } |
1545 | switch (status) { | |
1546 | default: | |
3660cd43 AA |
1547 | printk(KERN_ERR "NFS: %s: unhandled error %d\n", |
1548 | __func__, status); | |
1da177e4 | 1549 | case -ENOENT: |
965b5d67 | 1550 | case -ENOMEM: |
304020fe TM |
1551 | case -EACCES: |
1552 | case -EROFS: | |
1553 | case -EIO: | |
b79a4a1b | 1554 | case -ESTALE: |
3660cd43 | 1555 | /* Open state on this file cannot be recovered */ |
5d422301 | 1556 | nfs4_state_mark_recovery_failed(state, status); |
1da177e4 | 1557 | break; |
91876b13 TM |
1558 | case -EAGAIN: |
1559 | ssleep(1); | |
965b5d67 TM |
1560 | case -NFS4ERR_ADMIN_REVOKED: |
1561 | case -NFS4ERR_STALE_STATEID: | |
d41cbfc9 | 1562 | case -NFS4ERR_OLD_STATEID: |
965b5d67 | 1563 | case -NFS4ERR_BAD_STATEID: |
b79a4a1b TM |
1564 | case -NFS4ERR_RECLAIM_BAD: |
1565 | case -NFS4ERR_RECLAIM_CONFLICT: | |
1f0e890d | 1566 | nfs4_state_mark_reclaim_nograce(sp->so_server->nfs_client, state); |
b79a4a1b | 1567 | break; |
1da177e4 LT |
1568 | case -NFS4ERR_EXPIRED: |
1569 | case -NFS4ERR_NO_GRACE: | |
1f0e890d | 1570 | nfs4_state_mark_reclaim_nograce(sp->so_server->nfs_client, state); |
1da177e4 | 1571 | case -NFS4ERR_STALE_CLIENTID: |
9c4c761a TM |
1572 | case -NFS4ERR_BADSESSION: |
1573 | case -NFS4ERR_BADSLOT: | |
1574 | case -NFS4ERR_BAD_HIGH_SLOT: | |
1575 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
1da177e4 LT |
1576 | goto out_err; |
1577 | } | |
fe1d8195 | 1578 | nfs4_put_open_state(state); |
c137afab | 1579 | spin_lock(&sp->so_lock); |
fe1d8195 | 1580 | goto restart; |
1da177e4 | 1581 | } |
abbec2da | 1582 | raw_write_seqcount_end(&sp->so_reclaim_seqcount); |
fe1d8195 | 1583 | spin_unlock(&sp->so_lock); |
1da177e4 LT |
1584 | return 0; |
1585 | out_err: | |
fe1d8195 | 1586 | nfs4_put_open_state(state); |
c137afab | 1587 | spin_lock(&sp->so_lock); |
abbec2da | 1588 | raw_write_seqcount_end(&sp->so_reclaim_seqcount); |
c137afab | 1589 | spin_unlock(&sp->so_lock); |
1da177e4 LT |
1590 | return status; |
1591 | } | |
1592 | ||
b79a4a1b TM |
1593 | static void nfs4_clear_open_state(struct nfs4_state *state) |
1594 | { | |
1595 | struct nfs4_lock_state *lock; | |
1596 | ||
1597 | clear_bit(NFS_DELEGATED_STATE, &state->flags); | |
1598 | clear_bit(NFS_O_RDONLY_STATE, &state->flags); | |
1599 | clear_bit(NFS_O_WRONLY_STATE, &state->flags); | |
1600 | clear_bit(NFS_O_RDWR_STATE, &state->flags); | |
4b44b40e | 1601 | spin_lock(&state->state_lock); |
b79a4a1b | 1602 | list_for_each_entry(lock, &state->lock_states, ls_locks) { |
b79a4a1b | 1603 | lock->ls_seqid.flags = 0; |
795a88c9 | 1604 | clear_bit(NFS_LOCK_INITIALIZED, &lock->ls_flags); |
b79a4a1b | 1605 | } |
4b44b40e | 1606 | spin_unlock(&state->state_lock); |
b79a4a1b TM |
1607 | } |
1608 | ||
24d292b8 CL |
1609 | static void nfs4_reset_seqids(struct nfs_server *server, |
1610 | int (*mark_reclaim)(struct nfs_client *clp, struct nfs4_state *state)) | |
cee54fc9 | 1611 | { |
24d292b8 | 1612 | struct nfs_client *clp = server->nfs_client; |
cee54fc9 | 1613 | struct nfs4_state_owner *sp; |
9f958ab8 | 1614 | struct rb_node *pos; |
cee54fc9 | 1615 | struct nfs4_state *state; |
cee54fc9 | 1616 | |
24d292b8 CL |
1617 | spin_lock(&clp->cl_lock); |
1618 | for (pos = rb_first(&server->state_owners); | |
1619 | pos != NULL; | |
1620 | pos = rb_next(pos)) { | |
1621 | sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); | |
cee54fc9 | 1622 | sp->so_seqid.flags = 0; |
ec073428 | 1623 | spin_lock(&sp->so_lock); |
cee54fc9 | 1624 | list_for_each_entry(state, &sp->so_states, open_states) { |
b79a4a1b TM |
1625 | if (mark_reclaim(clp, state)) |
1626 | nfs4_clear_open_state(state); | |
cee54fc9 | 1627 | } |
ec073428 | 1628 | spin_unlock(&sp->so_lock); |
cee54fc9 | 1629 | } |
24d292b8 CL |
1630 | spin_unlock(&clp->cl_lock); |
1631 | } | |
1632 | ||
1633 | static void nfs4_state_mark_reclaim_helper(struct nfs_client *clp, | |
1634 | int (*mark_reclaim)(struct nfs_client *clp, struct nfs4_state *state)) | |
1635 | { | |
1636 | struct nfs_server *server; | |
1637 | ||
1638 | rcu_read_lock(); | |
1639 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) | |
1640 | nfs4_reset_seqids(server, mark_reclaim); | |
1641 | rcu_read_unlock(); | |
cee54fc9 TM |
1642 | } |
1643 | ||
b79a4a1b TM |
1644 | static void nfs4_state_start_reclaim_reboot(struct nfs_client *clp) |
1645 | { | |
1646 | /* Mark all delegations for reclaim */ | |
1647 | nfs_delegation_mark_reclaim(clp); | |
1648 | nfs4_state_mark_reclaim_helper(clp, nfs4_state_mark_reclaim_reboot); | |
1649 | } | |
1650 | ||
fce5c838 | 1651 | static void nfs4_reclaim_complete(struct nfs_client *clp, |
965e9c23 TM |
1652 | const struct nfs4_state_recovery_ops *ops, |
1653 | struct rpc_cred *cred) | |
fce5c838 RL |
1654 | { |
1655 | /* Notify the server we're done reclaiming our state */ | |
1656 | if (ops->reclaim_complete) | |
965e9c23 | 1657 | (void)ops->reclaim_complete(clp, cred); |
fce5c838 RL |
1658 | } |
1659 | ||
24d292b8 | 1660 | static void nfs4_clear_reclaim_server(struct nfs_server *server) |
b79a4a1b | 1661 | { |
24d292b8 | 1662 | struct nfs_client *clp = server->nfs_client; |
b79a4a1b TM |
1663 | struct nfs4_state_owner *sp; |
1664 | struct rb_node *pos; | |
1665 | struct nfs4_state *state; | |
1666 | ||
24d292b8 CL |
1667 | spin_lock(&clp->cl_lock); |
1668 | for (pos = rb_first(&server->state_owners); | |
1669 | pos != NULL; | |
1670 | pos = rb_next(pos)) { | |
1671 | sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); | |
b79a4a1b TM |
1672 | spin_lock(&sp->so_lock); |
1673 | list_for_each_entry(state, &sp->so_states, open_states) { | |
24d292b8 CL |
1674 | if (!test_and_clear_bit(NFS_STATE_RECLAIM_REBOOT, |
1675 | &state->flags)) | |
b79a4a1b TM |
1676 | continue; |
1677 | nfs4_state_mark_reclaim_nograce(clp, state); | |
1678 | } | |
1679 | spin_unlock(&sp->so_lock); | |
1680 | } | |
24d292b8 CL |
1681 | spin_unlock(&clp->cl_lock); |
1682 | } | |
1683 | ||
1684 | static int nfs4_state_clear_reclaim_reboot(struct nfs_client *clp) | |
1685 | { | |
1686 | struct nfs_server *server; | |
1687 | ||
1688 | if (!test_and_clear_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) | |
1689 | return 0; | |
1690 | ||
1691 | rcu_read_lock(); | |
1692 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) | |
1693 | nfs4_clear_reclaim_server(server); | |
1694 | rcu_read_unlock(); | |
b79a4a1b TM |
1695 | |
1696 | nfs_delegation_reap_unclaimed(clp); | |
6eaa6149 TM |
1697 | return 1; |
1698 | } | |
1699 | ||
1700 | static void nfs4_state_end_reclaim_reboot(struct nfs_client *clp) | |
1701 | { | |
965e9c23 TM |
1702 | const struct nfs4_state_recovery_ops *ops; |
1703 | struct rpc_cred *cred; | |
1704 | ||
6eaa6149 TM |
1705 | if (!nfs4_state_clear_reclaim_reboot(clp)) |
1706 | return; | |
965e9c23 | 1707 | ops = clp->cl_mvops->reboot_recovery_ops; |
73d8bde5 | 1708 | cred = nfs4_get_clid_cred(clp); |
965e9c23 TM |
1709 | nfs4_reclaim_complete(clp, ops, cred); |
1710 | put_rpccred(cred); | |
b79a4a1b TM |
1711 | } |
1712 | ||
b79a4a1b TM |
1713 | static void nfs4_state_start_reclaim_nograce(struct nfs_client *clp) |
1714 | { | |
45870d69 | 1715 | nfs_mark_test_expired_all_delegations(clp); |
b79a4a1b TM |
1716 | nfs4_state_mark_reclaim_helper(clp, nfs4_state_mark_reclaim_nograce); |
1717 | } | |
1718 | ||
4f7cdf18 | 1719 | static int nfs4_recovery_handle_error(struct nfs_client *clp, int error) |
e598d843 TM |
1720 | { |
1721 | switch (error) { | |
4f38e4aa TM |
1722 | case 0: |
1723 | break; | |
e598d843 | 1724 | case -NFS4ERR_CB_PATH_DOWN: |
ad1e3968 | 1725 | nfs40_handle_cb_pathdown(clp); |
4f38e4aa | 1726 | break; |
c8b7ae3d TM |
1727 | case -NFS4ERR_NO_GRACE: |
1728 | nfs4_state_end_reclaim_reboot(clp); | |
4f38e4aa | 1729 | break; |
e598d843 | 1730 | case -NFS4ERR_STALE_CLIENTID: |
e598d843 | 1731 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); |
6eaa6149 | 1732 | nfs4_state_clear_reclaim_reboot(clp); |
e598d843 TM |
1733 | nfs4_state_start_reclaim_reboot(clp); |
1734 | break; | |
1735 | case -NFS4ERR_EXPIRED: | |
1736 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1737 | nfs4_state_start_reclaim_nograce(clp); | |
8ba9bf8e | 1738 | break; |
c3fad1b1 AA |
1739 | case -NFS4ERR_BADSESSION: |
1740 | case -NFS4ERR_BADSLOT: | |
1741 | case -NFS4ERR_BAD_HIGH_SLOT: | |
1742 | case -NFS4ERR_DEADSESSION: | |
c3fad1b1 AA |
1743 | case -NFS4ERR_SEQ_FALSE_RETRY: |
1744 | case -NFS4ERR_SEQ_MISORDERED: | |
6df08189 | 1745 | set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); |
0b9e2d41 | 1746 | /* Zero session reset errors */ |
4f38e4aa | 1747 | break; |
7c5d7256 TM |
1748 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: |
1749 | set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); | |
1750 | break; | |
4f38e4aa | 1751 | default: |
cc0a9843 TM |
1752 | dprintk("%s: failed to handle error %d for server %s\n", |
1753 | __func__, error, clp->cl_hostname); | |
4f38e4aa | 1754 | return error; |
e598d843 | 1755 | } |
cc0a9843 TM |
1756 | dprintk("%s: handled error %d for server %s\n", __func__, error, |
1757 | clp->cl_hostname); | |
4f38e4aa | 1758 | return 0; |
e598d843 TM |
1759 | } |
1760 | ||
02860014 | 1761 | static int nfs4_do_reclaim(struct nfs_client *clp, const struct nfs4_state_recovery_ops *ops) |
1da177e4 | 1762 | { |
24d292b8 CL |
1763 | struct nfs4_state_owner *sp; |
1764 | struct nfs_server *server; | |
9f958ab8 | 1765 | struct rb_node *pos; |
1da177e4 LT |
1766 | int status = 0; |
1767 | ||
7eff03ae | 1768 | restart: |
24d292b8 CL |
1769 | rcu_read_lock(); |
1770 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { | |
0aaaf5c4 | 1771 | nfs4_purge_state_owners(server); |
24d292b8 CL |
1772 | spin_lock(&clp->cl_lock); |
1773 | for (pos = rb_first(&server->state_owners); | |
1774 | pos != NULL; | |
1775 | pos = rb_next(pos)) { | |
1776 | sp = rb_entry(pos, | |
1777 | struct nfs4_state_owner, so_server_node); | |
1778 | if (!test_and_clear_bit(ops->owner_flag_bit, | |
1779 | &sp->so_flags)) | |
1780 | continue; | |
4a0954ef TM |
1781 | if (!atomic_inc_not_zero(&sp->so_count)) |
1782 | continue; | |
24d292b8 CL |
1783 | spin_unlock(&clp->cl_lock); |
1784 | rcu_read_unlock(); | |
1785 | ||
1786 | status = nfs4_reclaim_open_state(sp, ops); | |
1787 | if (status < 0) { | |
1788 | set_bit(ops->owner_flag_bit, &sp->so_flags); | |
1789 | nfs4_put_state_owner(sp); | |
df817ba3 TM |
1790 | status = nfs4_recovery_handle_error(clp, status); |
1791 | return (status != 0) ? status : -EAGAIN; | |
24d292b8 CL |
1792 | } |
1793 | ||
7eff03ae | 1794 | nfs4_put_state_owner(sp); |
24d292b8 | 1795 | goto restart; |
7eff03ae | 1796 | } |
24d292b8 | 1797 | spin_unlock(&clp->cl_lock); |
02860014 | 1798 | } |
24d292b8 | 1799 | rcu_read_unlock(); |
df817ba3 | 1800 | return 0; |
02860014 TM |
1801 | } |
1802 | ||
1803 | static int nfs4_check_lease(struct nfs_client *clp) | |
1804 | { | |
1805 | struct rpc_cred *cred; | |
c48f4f35 TM |
1806 | const struct nfs4_state_maintenance_ops *ops = |
1807 | clp->cl_mvops->state_renewal_ops; | |
4f38e4aa | 1808 | int status; |
1da177e4 | 1809 | |
0f605b56 TM |
1810 | /* Is the client already known to have an expired lease? */ |
1811 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) | |
1812 | return 0; | |
a7b72103 AA |
1813 | spin_lock(&clp->cl_lock); |
1814 | cred = ops->get_state_renewal_cred_locked(clp); | |
1815 | spin_unlock(&clp->cl_lock); | |
0f605b56 | 1816 | if (cred == NULL) { |
73d8bde5 | 1817 | cred = nfs4_get_clid_cred(clp); |
4f38e4aa | 1818 | status = -ENOKEY; |
0f605b56 TM |
1819 | if (cred == NULL) |
1820 | goto out; | |
286d7d6a | 1821 | } |
8e69514f | 1822 | status = ops->renew_lease(clp, cred); |
0f605b56 | 1823 | put_rpccred(cred); |
bc7a05ca TM |
1824 | if (status == -ETIMEDOUT) { |
1825 | set_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); | |
1826 | return 0; | |
1827 | } | |
0f605b56 | 1828 | out: |
4f7cdf18 | 1829 | return nfs4_recovery_handle_error(clp, status); |
02860014 TM |
1830 | } |
1831 | ||
47b803c8 AA |
1832 | /* Set NFS4CLNT_LEASE_EXPIRED and reclaim reboot state for all v4.0 errors |
1833 | * and for recoverable errors on EXCHANGE_ID for v4.1 | |
2a6ee6aa TM |
1834 | */ |
1835 | static int nfs4_handle_reclaim_lease_error(struct nfs_client *clp, int status) | |
1836 | { | |
1837 | switch (status) { | |
89a21736 TM |
1838 | case -NFS4ERR_SEQ_MISORDERED: |
1839 | if (test_and_set_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) | |
1840 | return -ESERVERFAULT; | |
1841 | /* Lease confirmation error: retry after purging the lease */ | |
1842 | ssleep(1); | |
47b803c8 AA |
1843 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
1844 | break; | |
2a6ee6aa TM |
1845 | case -NFS4ERR_STALE_CLIENTID: |
1846 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); | |
47b803c8 | 1847 | nfs4_state_start_reclaim_reboot(clp); |
2a6ee6aa | 1848 | break; |
de734831 CL |
1849 | case -NFS4ERR_CLID_INUSE: |
1850 | pr_err("NFS: Server %s reports our clientid is in use\n", | |
1851 | clp->cl_hostname); | |
1852 | nfs_mark_client_ready(clp, -EPERM); | |
1853 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); | |
1854 | return -EPERM; | |
2a6ee6aa | 1855 | case -EACCES: |
2a6ee6aa TM |
1856 | case -NFS4ERR_DELAY: |
1857 | case -ETIMEDOUT: | |
1858 | case -EAGAIN: | |
1859 | ssleep(1); | |
1860 | break; | |
1861 | ||
1862 | case -NFS4ERR_MINOR_VERS_MISMATCH: | |
1863 | if (clp->cl_cons_state == NFS_CS_SESSION_INITING) | |
1864 | nfs_mark_client_ready(clp, -EPROTONOSUPPORT); | |
cc0a9843 TM |
1865 | dprintk("%s: exit with error %d for server %s\n", |
1866 | __func__, -EPROTONOSUPPORT, clp->cl_hostname); | |
2a6ee6aa | 1867 | return -EPROTONOSUPPORT; |
2a6ee6aa TM |
1868 | case -NFS4ERR_NOT_SAME: /* FixMe: implement recovery |
1869 | * in nfs4_exchange_id */ | |
1870 | default: | |
cc0a9843 TM |
1871 | dprintk("%s: exit with error %d for server %s\n", __func__, |
1872 | status, clp->cl_hostname); | |
2a6ee6aa TM |
1873 | return status; |
1874 | } | |
1875 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
cc0a9843 TM |
1876 | dprintk("%s: handled error %d for server %s\n", __func__, status, |
1877 | clp->cl_hostname); | |
2a6ee6aa TM |
1878 | return 0; |
1879 | } | |
1880 | ||
b42353ff | 1881 | static int nfs4_establish_lease(struct nfs_client *clp) |
02860014 TM |
1882 | { |
1883 | struct rpc_cred *cred; | |
c48f4f35 TM |
1884 | const struct nfs4_state_recovery_ops *ops = |
1885 | clp->cl_mvops->reboot_recovery_ops; | |
2a6ee6aa | 1886 | int status; |
02860014 | 1887 | |
5cae02f4 | 1888 | nfs4_begin_drain_session(clp); |
73d8bde5 | 1889 | cred = nfs4_get_clid_cred(clp); |
2a6ee6aa TM |
1890 | if (cred == NULL) |
1891 | return -ENOENT; | |
1892 | status = ops->establish_clid(clp, cred); | |
1893 | put_rpccred(cred); | |
1894 | if (status != 0) | |
b42353ff TM |
1895 | return status; |
1896 | pnfs_destroy_all_layouts(clp); | |
1897 | return 0; | |
1898 | } | |
1899 | ||
6bbb4ae8 CL |
1900 | /* |
1901 | * Returns zero or a negative errno. NFS4ERR values are converted | |
1902 | * to local errno values. | |
1903 | */ | |
b42353ff TM |
1904 | static int nfs4_reclaim_lease(struct nfs_client *clp) |
1905 | { | |
1906 | int status; | |
1907 | ||
1908 | status = nfs4_establish_lease(clp); | |
1909 | if (status < 0) | |
1910 | return nfs4_handle_reclaim_lease_error(clp, status); | |
1911 | if (test_and_clear_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state)) | |
1912 | nfs4_state_start_reclaim_nograce(clp); | |
1913 | if (!test_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) | |
1914 | set_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state); | |
1915 | clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); | |
1916 | clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1917 | return 0; | |
1918 | } | |
1919 | ||
1920 | static int nfs4_purge_lease(struct nfs_client *clp) | |
1921 | { | |
1922 | int status; | |
1923 | ||
1924 | status = nfs4_establish_lease(clp); | |
1925 | if (status < 0) | |
2a6ee6aa | 1926 | return nfs4_handle_reclaim_lease_error(clp, status); |
b42353ff TM |
1927 | clear_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state); |
1928 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1929 | nfs4_state_start_reclaim_nograce(clp); | |
2a6ee6aa | 1930 | return 0; |
02860014 TM |
1931 | } |
1932 | ||
c9fdeb28 CL |
1933 | /* |
1934 | * Try remote migration of one FSID from a source server to a | |
1935 | * destination server. The source server provides a list of | |
1936 | * potential destinations. | |
1937 | * | |
1938 | * Returns zero or a negative NFS4ERR status code. | |
1939 | */ | |
1940 | static int nfs4_try_migration(struct nfs_server *server, struct rpc_cred *cred) | |
1941 | { | |
1942 | struct nfs_client *clp = server->nfs_client; | |
1943 | struct nfs4_fs_locations *locations = NULL; | |
1944 | struct inode *inode; | |
1945 | struct page *page; | |
1946 | int status, result; | |
1947 | ||
1948 | dprintk("--> %s: FSID %llx:%llx on \"%s\"\n", __func__, | |
1949 | (unsigned long long)server->fsid.major, | |
1950 | (unsigned long long)server->fsid.minor, | |
1951 | clp->cl_hostname); | |
1952 | ||
1953 | result = 0; | |
1954 | page = alloc_page(GFP_KERNEL); | |
1955 | locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL); | |
1956 | if (page == NULL || locations == NULL) { | |
1957 | dprintk("<-- %s: no memory\n", __func__); | |
1958 | goto out; | |
1959 | } | |
1960 | ||
2b0143b5 | 1961 | inode = d_inode(server->super->s_root); |
c9fdeb28 CL |
1962 | result = nfs4_proc_get_locations(inode, locations, page, cred); |
1963 | if (result) { | |
1964 | dprintk("<-- %s: failed to retrieve fs_locations: %d\n", | |
1965 | __func__, result); | |
1966 | goto out; | |
1967 | } | |
1968 | ||
1969 | result = -NFS4ERR_NXIO; | |
1970 | if (!(locations->fattr.valid & NFS_ATTR_FATTR_V4_LOCATIONS)) { | |
1971 | dprintk("<-- %s: No fs_locations data, migration skipped\n", | |
1972 | __func__); | |
1973 | goto out; | |
1974 | } | |
1975 | ||
1976 | nfs4_begin_drain_session(clp); | |
1977 | ||
1978 | status = nfs4_replace_transport(server, locations); | |
1979 | if (status != 0) { | |
1980 | dprintk("<-- %s: failed to replace transport: %d\n", | |
1981 | __func__, status); | |
1982 | goto out; | |
1983 | } | |
1984 | ||
1985 | result = 0; | |
1986 | dprintk("<-- %s: migration succeeded\n", __func__); | |
1987 | ||
1988 | out: | |
1989 | if (page != NULL) | |
1990 | __free_page(page); | |
1991 | kfree(locations); | |
1992 | if (result) { | |
1993 | pr_err("NFS: migration recovery failed (server %s)\n", | |
1994 | clp->cl_hostname); | |
1995 | set_bit(NFS_MIG_FAILED, &server->mig_status); | |
1996 | } | |
1997 | return result; | |
1998 | } | |
1999 | ||
2000 | /* | |
2001 | * Returns zero or a negative NFS4ERR status code. | |
2002 | */ | |
2003 | static int nfs4_handle_migration(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: migration 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 | int status; | |
2024 | ||
2025 | if (server->mig_gen == clp->cl_mig_gen) | |
2026 | continue; | |
2027 | server->mig_gen = clp->cl_mig_gen; | |
2028 | ||
2029 | if (!test_and_clear_bit(NFS_MIG_IN_TRANSITION, | |
2030 | &server->mig_status)) | |
2031 | continue; | |
2032 | ||
2033 | rcu_read_unlock(); | |
2034 | status = nfs4_try_migration(server, cred); | |
2035 | if (status < 0) { | |
2036 | put_rpccred(cred); | |
2037 | return status; | |
2038 | } | |
2039 | goto restart; | |
2040 | } | |
2041 | rcu_read_unlock(); | |
2042 | put_rpccred(cred); | |
2043 | return 0; | |
2044 | } | |
2045 | ||
b7f7a66e CL |
2046 | /* |
2047 | * Test each nfs_server on the clp's cl_superblocks list to see | |
2048 | * if it's moved to another server. Stop when the server no longer | |
2049 | * returns NFS4ERR_LEASE_MOVED. | |
2050 | */ | |
2051 | static int nfs4_handle_lease_moved(struct nfs_client *clp) | |
2052 | { | |
2053 | const struct nfs4_state_maintenance_ops *ops = | |
2054 | clp->cl_mvops->state_renewal_ops; | |
2055 | struct nfs_server *server; | |
2056 | struct rpc_cred *cred; | |
2057 | ||
2058 | dprintk("%s: lease moved reported on \"%s\"\n", __func__, | |
2059 | clp->cl_hostname); | |
2060 | ||
2061 | spin_lock(&clp->cl_lock); | |
2062 | cred = ops->get_state_renewal_cred_locked(clp); | |
2063 | spin_unlock(&clp->cl_lock); | |
2064 | if (cred == NULL) | |
2065 | return -NFS4ERR_NOENT; | |
2066 | ||
2067 | clp->cl_mig_gen++; | |
2068 | restart: | |
2069 | rcu_read_lock(); | |
2070 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { | |
2071 | struct inode *inode; | |
2072 | int status; | |
2073 | ||
2074 | if (server->mig_gen == clp->cl_mig_gen) | |
2075 | continue; | |
2076 | server->mig_gen = clp->cl_mig_gen; | |
2077 | ||
2078 | rcu_read_unlock(); | |
2079 | ||
2b0143b5 | 2080 | inode = d_inode(server->super->s_root); |
b7f7a66e CL |
2081 | status = nfs4_proc_fsid_present(inode, cred); |
2082 | if (status != -NFS4ERR_MOVED) | |
2083 | goto restart; /* wasn't this one */ | |
2084 | if (nfs4_try_migration(server, cred) == -NFS4ERR_LEASE_MOVED) | |
2085 | goto restart; /* there are more */ | |
2086 | goto out; | |
2087 | } | |
2088 | rcu_read_unlock(); | |
2089 | ||
2090 | out: | |
2091 | put_rpccred(cred); | |
2092 | return 0; | |
2093 | } | |
2094 | ||
05f4c350 CL |
2095 | /** |
2096 | * nfs4_discover_server_trunking - Detect server IP address trunking | |
2097 | * | |
2098 | * @clp: nfs_client under test | |
2099 | * @result: OUT: found nfs_client, or clp | |
2100 | * | |
2101 | * Returns zero or a negative errno. If zero is returned, | |
2102 | * an nfs_client pointer is planted in "result". | |
2103 | * | |
2104 | * Note: since we are invoked in process context, and | |
2105 | * not from inside the state manager, we cannot use | |
2106 | * nfs4_handle_reclaim_lease_error(). | |
2107 | */ | |
2108 | int nfs4_discover_server_trunking(struct nfs_client *clp, | |
2109 | struct nfs_client **result) | |
2110 | { | |
2111 | const struct nfs4_state_recovery_ops *ops = | |
2112 | clp->cl_mvops->reboot_recovery_ops; | |
05f4c350 CL |
2113 | struct rpc_clnt *clnt; |
2114 | struct rpc_cred *cred; | |
4edaa308 | 2115 | int i, status; |
05f4c350 CL |
2116 | |
2117 | dprintk("NFS: %s: testing '%s'\n", __func__, clp->cl_hostname); | |
2118 | ||
05f4c350 | 2119 | clnt = clp->cl_rpcclient; |
05f4c350 CL |
2120 | i = 0; |
2121 | ||
2122 | mutex_lock(&nfs_clid_init_mutex); | |
05f4c350 | 2123 | again: |
ea33e6c3 | 2124 | status = -ENOENT; |
73d8bde5 | 2125 | cred = nfs4_get_clid_cred(clp); |
05f4c350 CL |
2126 | if (cred == NULL) |
2127 | goto out_unlock; | |
2128 | ||
2129 | status = ops->detect_trunking(clp, result, cred); | |
2130 | put_rpccred(cred); | |
2131 | switch (status) { | |
2132 | case 0: | |
2133 | break; | |
05f4c350 | 2134 | case -ETIMEDOUT: |
150e7260 TM |
2135 | if (clnt->cl_softrtry) |
2136 | break; | |
2137 | case -NFS4ERR_DELAY: | |
05f4c350 CL |
2138 | case -EAGAIN: |
2139 | ssleep(1); | |
202c312d | 2140 | case -NFS4ERR_STALE_CLIENTID: |
05f4c350 CL |
2141 | dprintk("NFS: %s after status %d, retrying\n", |
2142 | __func__, status); | |
2143 | goto again; | |
4edaa308 | 2144 | case -EACCES: |
d688f7b8 CL |
2145 | if (i++ == 0) { |
2146 | nfs4_root_machine_cred(clp); | |
2147 | goto again; | |
2148 | } | |
6d769f1e | 2149 | if (clnt->cl_auth->au_flavor == RPC_AUTH_UNIX) |
4edaa308 | 2150 | break; |
05f4c350 CL |
2151 | case -NFS4ERR_CLID_INUSE: |
2152 | case -NFS4ERR_WRONGSEC: | |
6d769f1e JL |
2153 | /* No point in retrying if we already used RPC_AUTH_UNIX */ |
2154 | if (clnt->cl_auth->au_flavor == RPC_AUTH_UNIX) { | |
2155 | status = -EPERM; | |
2156 | break; | |
2157 | } | |
79d852bf | 2158 | clnt = rpc_clone_client_set_auth(clnt, RPC_AUTH_UNIX); |
05f4c350 CL |
2159 | if (IS_ERR(clnt)) { |
2160 | status = PTR_ERR(clnt); | |
2161 | break; | |
2162 | } | |
b193d59a TM |
2163 | /* Note: this is safe because we haven't yet marked the |
2164 | * client as ready, so we are the only user of | |
2165 | * clp->cl_rpcclient | |
2166 | */ | |
2167 | clnt = xchg(&clp->cl_rpcclient, clnt); | |
2168 | rpc_shutdown_client(clnt); | |
2169 | clnt = clp->cl_rpcclient; | |
05f4c350 CL |
2170 | goto again; |
2171 | ||
2172 | case -NFS4ERR_MINOR_VERS_MISMATCH: | |
2173 | status = -EPROTONOSUPPORT; | |
2174 | break; | |
2175 | ||
2176 | case -EKEYEXPIRED: | |
05f4c350 CL |
2177 | case -NFS4ERR_NOT_SAME: /* FixMe: implement recovery |
2178 | * in nfs4_exchange_id */ | |
2179 | status = -EKEYEXPIRED; | |
ea33e6c3 TM |
2180 | break; |
2181 | default: | |
2182 | pr_warn("NFS: %s unhandled error %d. Exiting with error EIO\n", | |
2183 | __func__, status); | |
2184 | status = -EIO; | |
05f4c350 CL |
2185 | } |
2186 | ||
2187 | out_unlock: | |
2188 | mutex_unlock(&nfs_clid_init_mutex); | |
05f4c350 CL |
2189 | dprintk("NFS: %s: status = %d\n", __func__, status); |
2190 | return status; | |
2191 | } | |
2192 | ||
76db6d95 | 2193 | #ifdef CONFIG_NFS_V4_1 |
9f594791 | 2194 | void nfs4_schedule_session_recovery(struct nfs4_session *session, int err) |
0400a6b0 | 2195 | { |
444f72fe TM |
2196 | struct nfs_client *clp = session->clp; |
2197 | ||
9f594791 TM |
2198 | switch (err) { |
2199 | default: | |
2200 | set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); | |
2201 | break; | |
2202 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
2203 | set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); | |
2204 | } | |
d94cbf6c | 2205 | nfs4_schedule_state_manager(clp); |
0400a6b0 | 2206 | } |
cbdabc7f | 2207 | EXPORT_SYMBOL_GPL(nfs4_schedule_session_recovery); |
0400a6b0 | 2208 | |
3f10a6af | 2209 | void nfs41_notify_server(struct nfs_client *clp) |
ac074835 TM |
2210 | { |
2211 | /* Use CHECK_LEASE to ping the server with a SEQUENCE */ | |
2212 | set_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); | |
2213 | nfs4_schedule_state_manager(clp); | |
2214 | } | |
2215 | ||
0f79fd6f TM |
2216 | static void nfs4_reset_all_state(struct nfs_client *clp) |
2217 | { | |
2218 | if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) == 0) { | |
2c820d9a | 2219 | set_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state); |
be0bfed0 | 2220 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
0f79fd6f | 2221 | nfs4_state_start_reclaim_nograce(clp); |
cc0a9843 TM |
2222 | dprintk("%s: scheduling reset of all state for server %s!\n", |
2223 | __func__, clp->cl_hostname); | |
0400a6b0 | 2224 | nfs4_schedule_state_manager(clp); |
0f79fd6f TM |
2225 | } |
2226 | } | |
2227 | ||
2228 | static void nfs41_handle_server_reboot(struct nfs_client *clp) | |
2229 | { | |
2230 | if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) == 0) { | |
2231 | nfs4_state_start_reclaim_reboot(clp); | |
cc0a9843 TM |
2232 | dprintk("%s: server %s rebooted!\n", __func__, |
2233 | clp->cl_hostname); | |
0400a6b0 | 2234 | nfs4_schedule_state_manager(clp); |
0f79fd6f TM |
2235 | } |
2236 | } | |
2237 | ||
8b895ce6 | 2238 | static void nfs41_handle_all_state_revoked(struct nfs_client *clp) |
0f79fd6f | 2239 | { |
0f79fd6f | 2240 | nfs4_reset_all_state(clp); |
cc0a9843 | 2241 | dprintk("%s: state revoked on server %s\n", __func__, clp->cl_hostname); |
0f79fd6f TM |
2242 | } |
2243 | ||
8b895ce6 TM |
2244 | static void nfs41_handle_some_state_revoked(struct nfs_client *clp) |
2245 | { | |
45870d69 | 2246 | nfs4_state_start_reclaim_nograce(clp); |
8b895ce6 TM |
2247 | nfs4_schedule_state_manager(clp); |
2248 | ||
2249 | dprintk("%s: state revoked on server %s\n", __func__, clp->cl_hostname); | |
2250 | } | |
2251 | ||
0f79fd6f TM |
2252 | static void nfs41_handle_recallable_state_revoked(struct nfs_client *clp) |
2253 | { | |
4099287f TM |
2254 | /* FIXME: For now, we destroy all layouts. */ |
2255 | pnfs_destroy_all_layouts(clp); | |
2256 | /* FIXME: For now, we test all delegations+open state+locks. */ | |
2257 | nfs41_handle_some_state_revoked(clp); | |
cc0a9843 TM |
2258 | dprintk("%s: Recallable state revoked on server %s!\n", __func__, |
2259 | clp->cl_hostname); | |
0f79fd6f TM |
2260 | } |
2261 | ||
a9e64442 | 2262 | static void nfs41_handle_backchannel_fault(struct nfs_client *clp) |
0f79fd6f | 2263 | { |
b1352905 TM |
2264 | set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); |
2265 | nfs4_schedule_state_manager(clp); | |
2266 | ||
cc0a9843 TM |
2267 | dprintk("%s: server %s declared a backchannel fault\n", __func__, |
2268 | clp->cl_hostname); | |
0f79fd6f TM |
2269 | } |
2270 | ||
a9e64442 WAA |
2271 | static void nfs41_handle_cb_path_down(struct nfs_client *clp) |
2272 | { | |
2273 | if (test_and_set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, | |
2274 | &clp->cl_state) == 0) | |
2275 | nfs4_schedule_state_manager(clp); | |
2276 | } | |
2277 | ||
0a014a44 TM |
2278 | void nfs41_handle_sequence_flag_errors(struct nfs_client *clp, u32 flags, |
2279 | bool recovery) | |
0629e370 AB |
2280 | { |
2281 | if (!flags) | |
2282 | return; | |
2c820d9a CL |
2283 | |
2284 | dprintk("%s: \"%s\" (client ID %llx) flags=0x%08x\n", | |
2285 | __func__, clp->cl_hostname, clp->cl_clientid, flags); | |
0a014a44 TM |
2286 | /* |
2287 | * If we're called from the state manager thread, then assume we're | |
2288 | * already handling the RECLAIM_NEEDED and/or STATE_REVOKED. | |
2289 | * Those flags are expected to remain set until we're done | |
2290 | * recovering (see RFC5661, section 18.46.3). | |
2291 | */ | |
2292 | if (recovery) | |
2293 | goto out_recovery; | |
2c820d9a | 2294 | |
111d489f | 2295 | if (flags & SEQ4_STATUS_RESTART_RECLAIM_NEEDED) |
0f79fd6f | 2296 | nfs41_handle_server_reboot(clp); |
8b895ce6 TM |
2297 | if (flags & (SEQ4_STATUS_EXPIRED_ALL_STATE_REVOKED)) |
2298 | nfs41_handle_all_state_revoked(clp); | |
2299 | if (flags & (SEQ4_STATUS_EXPIRED_SOME_STATE_REVOKED | | |
d1c2331e | 2300 | SEQ4_STATUS_ADMIN_STATE_REVOKED)) |
8b895ce6 | 2301 | nfs41_handle_some_state_revoked(clp); |
d1c2331e CL |
2302 | if (flags & SEQ4_STATUS_LEASE_MOVED) |
2303 | nfs4_schedule_lease_moved_recovery(clp); | |
111d489f | 2304 | if (flags & SEQ4_STATUS_RECALLABLE_STATE_REVOKED) |
0f79fd6f | 2305 | nfs41_handle_recallable_state_revoked(clp); |
0a014a44 | 2306 | out_recovery: |
a9e64442 WAA |
2307 | if (flags & SEQ4_STATUS_BACKCHANNEL_FAULT) |
2308 | nfs41_handle_backchannel_fault(clp); | |
2309 | else if (flags & (SEQ4_STATUS_CB_PATH_DOWN | | |
2310 | SEQ4_STATUS_CB_PATH_DOWN_SESSION)) | |
0f79fd6f | 2311 | nfs41_handle_cb_path_down(clp); |
0629e370 AB |
2312 | } |
2313 | ||
c3fad1b1 AA |
2314 | static int nfs4_reset_session(struct nfs_client *clp) |
2315 | { | |
848f5bda | 2316 | struct rpc_cred *cred; |
c3fad1b1 AA |
2317 | int status; |
2318 | ||
1a47e7a6 TM |
2319 | if (!nfs4_has_session(clp)) |
2320 | return 0; | |
38045412 | 2321 | nfs4_begin_drain_session(clp); |
73d8bde5 | 2322 | cred = nfs4_get_clid_cred(clp); |
848f5bda | 2323 | status = nfs4_proc_destroy_session(clp->cl_session, cred); |
c489ee29 TM |
2324 | switch (status) { |
2325 | case 0: | |
2326 | case -NFS4ERR_BADSESSION: | |
2327 | case -NFS4ERR_DEADSESSION: | |
2328 | break; | |
2329 | case -NFS4ERR_BACK_CHAN_BUSY: | |
2330 | case -NFS4ERR_DELAY: | |
2331 | set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); | |
2332 | status = 0; | |
2333 | ssleep(1); | |
2334 | goto out; | |
2335 | default: | |
f455848a | 2336 | status = nfs4_recovery_handle_error(clp, status); |
c3fad1b1 AA |
2337 | goto out; |
2338 | } | |
2339 | ||
2340 | memset(clp->cl_session->sess_id.data, 0, NFS4_MAX_SESSIONID_LEN); | |
848f5bda | 2341 | status = nfs4_proc_create_session(clp, cred); |
41f54a55 | 2342 | if (status) { |
cc0a9843 TM |
2343 | dprintk("%s: session reset failed with status %d for server %s!\n", |
2344 | __func__, status, clp->cl_hostname); | |
f2c1b510 | 2345 | status = nfs4_handle_reclaim_lease_error(clp, status); |
41f54a55 AA |
2346 | goto out; |
2347 | } | |
bda197f5 | 2348 | nfs41_finish_session_reset(clp); |
cc0a9843 TM |
2349 | dprintk("%s: session reset was successful for server %s!\n", |
2350 | __func__, clp->cl_hostname); | |
41f54a55 | 2351 | out: |
848f5bda TM |
2352 | if (cred) |
2353 | put_rpccred(cred); | |
c3fad1b1 AA |
2354 | return status; |
2355 | } | |
76db6d95 | 2356 | |
a9e64442 WAA |
2357 | static int nfs4_bind_conn_to_session(struct nfs_client *clp) |
2358 | { | |
2cf047c9 TM |
2359 | struct rpc_cred *cred; |
2360 | int ret; | |
2361 | ||
1a47e7a6 TM |
2362 | if (!nfs4_has_session(clp)) |
2363 | return 0; | |
43ac544c | 2364 | nfs4_begin_drain_session(clp); |
73d8bde5 | 2365 | cred = nfs4_get_clid_cred(clp); |
2cf047c9 TM |
2366 | ret = nfs4_proc_bind_conn_to_session(clp, cred); |
2367 | if (cred) | |
2368 | put_rpccred(cred); | |
43ac544c | 2369 | clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); |
bf674c82 TM |
2370 | switch (ret) { |
2371 | case 0: | |
cc0a9843 TM |
2372 | dprintk("%s: bind_conn_to_session was successful for server %s!\n", |
2373 | __func__, clp->cl_hostname); | |
bf674c82 TM |
2374 | break; |
2375 | case -NFS4ERR_DELAY: | |
2376 | ssleep(1); | |
2377 | set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); | |
2378 | break; | |
2379 | default: | |
2380 | return nfs4_recovery_handle_error(clp, ret); | |
2381 | } | |
2382 | return 0; | |
a9e64442 | 2383 | } |
76db6d95 | 2384 | #else /* CONFIG_NFS_V4_1 */ |
c3fad1b1 | 2385 | static int nfs4_reset_session(struct nfs_client *clp) { return 0; } |
a9e64442 WAA |
2386 | |
2387 | static int nfs4_bind_conn_to_session(struct nfs_client *clp) | |
2388 | { | |
2389 | return 0; | |
2390 | } | |
76db6d95 AA |
2391 | #endif /* CONFIG_NFS_V4_1 */ |
2392 | ||
e005e804 | 2393 | static void nfs4_state_manager(struct nfs_client *clp) |
02860014 | 2394 | { |
02860014 | 2395 | int status = 0; |
8ed27d4f | 2396 | const char *section = "", *section_sep = ""; |
02860014 | 2397 | |
02860014 | 2398 | /* Ensure exclusive access to NFSv4 state */ |
47c2199b | 2399 | do { |
2c820d9a | 2400 | if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) { |
8ed27d4f | 2401 | section = "purge state"; |
b42353ff | 2402 | status = nfs4_purge_lease(clp); |
2a6ee6aa TM |
2403 | if (status < 0) |
2404 | goto out_error; | |
b42353ff | 2405 | continue; |
2c820d9a CL |
2406 | } |
2407 | ||
b42353ff | 2408 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) { |
8ed27d4f | 2409 | section = "lease expired"; |
b79a4a1b TM |
2410 | /* We're going to have to re-establish a clientid */ |
2411 | status = nfs4_reclaim_lease(clp); | |
2a6ee6aa | 2412 | if (status < 0) |
b79a4a1b | 2413 | goto out_error; |
b42353ff | 2414 | continue; |
e598d843 TM |
2415 | } |
2416 | ||
c3fad1b1 | 2417 | /* Initialize or reset the session */ |
1a47e7a6 | 2418 | if (test_and_clear_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state)) { |
8ed27d4f | 2419 | section = "reset session"; |
4d643d1d | 2420 | status = nfs4_reset_session(clp); |
b6d408ba TM |
2421 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
2422 | continue; | |
2423 | if (status < 0) | |
76db6d95 | 2424 | goto out_error; |
76db6d95 | 2425 | } |
b6d408ba | 2426 | |
a9e64442 WAA |
2427 | /* Send BIND_CONN_TO_SESSION */ |
2428 | if (test_and_clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION, | |
1a47e7a6 | 2429 | &clp->cl_state)) { |
8ed27d4f | 2430 | section = "bind conn to session"; |
a9e64442 WAA |
2431 | status = nfs4_bind_conn_to_session(clp); |
2432 | if (status < 0) | |
2433 | goto out_error; | |
bf674c82 | 2434 | continue; |
a9e64442 WAA |
2435 | } |
2436 | ||
5df904ae TM |
2437 | if (test_and_clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state)) { |
2438 | section = "check lease"; | |
2439 | status = nfs4_check_lease(clp); | |
2440 | if (status < 0) | |
2441 | goto out_error; | |
8faaa6d5 | 2442 | continue; |
c9fdeb28 CL |
2443 | } |
2444 | ||
2445 | if (test_and_clear_bit(NFS4CLNT_MOVED, &clp->cl_state)) { | |
2446 | section = "migration"; | |
2447 | status = nfs4_handle_migration(clp); | |
2448 | if (status < 0) | |
2449 | goto out_error; | |
5df904ae TM |
2450 | } |
2451 | ||
b7f7a66e CL |
2452 | if (test_and_clear_bit(NFS4CLNT_LEASE_MOVED, &clp->cl_state)) { |
2453 | section = "lease moved"; | |
2454 | status = nfs4_handle_lease_moved(clp); | |
2455 | if (status < 0) | |
2456 | goto out_error; | |
2457 | } | |
2458 | ||
b79a4a1b | 2459 | /* First recover reboot state... */ |
e345e88a | 2460 | if (test_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) { |
8ed27d4f | 2461 | section = "reclaim reboot"; |
591d71cb | 2462 | status = nfs4_do_reclaim(clp, |
c48f4f35 | 2463 | clp->cl_mvops->reboot_recovery_ops); |
df817ba3 | 2464 | if (status == -EAGAIN) |
b6d408ba TM |
2465 | continue; |
2466 | if (status < 0) | |
2467 | goto out_error; | |
df817ba3 | 2468 | nfs4_state_end_reclaim_reboot(clp); |
02860014 TM |
2469 | } |
2470 | ||
45870d69 TM |
2471 | /* Detect expired delegations... */ |
2472 | if (test_and_clear_bit(NFS4CLNT_DELEGATION_EXPIRED, &clp->cl_state)) { | |
2473 | section = "detect expired delegations"; | |
2474 | nfs_reap_expired_delegations(clp); | |
2475 | continue; | |
2476 | } | |
2477 | ||
b79a4a1b TM |
2478 | /* Now recover expired state... */ |
2479 | if (test_and_clear_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) { | |
8ed27d4f | 2480 | section = "reclaim nograce"; |
591d71cb | 2481 | status = nfs4_do_reclaim(clp, |
c48f4f35 | 2482 | clp->cl_mvops->nograce_recovery_ops); |
df817ba3 | 2483 | if (status == -EAGAIN) |
b6d408ba TM |
2484 | continue; |
2485 | if (status < 0) | |
b79a4a1b | 2486 | goto out_error; |
1da177e4 | 2487 | } |
707fb4b3 | 2488 | |
5601a00d | 2489 | nfs4_end_drain_session(clp); |
707fb4b3 TM |
2490 | if (test_and_clear_bit(NFS4CLNT_DELEGRETURN, &clp->cl_state)) { |
2491 | nfs_client_return_marked_delegations(clp); | |
2492 | continue; | |
2493 | } | |
e005e804 TM |
2494 | |
2495 | nfs4_clear_state_manager_bit(clp); | |
f3c76491 TM |
2496 | /* Did we race with an attempt to give us more work? */ |
2497 | if (clp->cl_state == 0) | |
2498 | break; | |
2499 | if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) != 0) | |
2500 | break; | |
47c2199b | 2501 | } while (atomic_read(&clp->cl_count) > 1); |
e005e804 | 2502 | return; |
1da177e4 | 2503 | out_error: |
8ed27d4f WAA |
2504 | if (strlen(section)) |
2505 | section_sep = ": "; | |
2506 | pr_warn_ratelimited("NFS: state manager%s%s failed on NFSv4 server %s" | |
2507 | " with error %d\n", section_sep, section, | |
2508 | clp->cl_hostname, -status); | |
ffe5a830 | 2509 | ssleep(1); |
5601a00d | 2510 | nfs4_end_drain_session(clp); |
e005e804 TM |
2511 | nfs4_clear_state_manager_bit(clp); |
2512 | } | |
2513 | ||
2514 | static int nfs4_run_state_manager(void *ptr) | |
2515 | { | |
2516 | struct nfs_client *clp = ptr; | |
2517 | ||
2518 | allow_signal(SIGKILL); | |
2519 | nfs4_state_manager(clp); | |
2520 | nfs_put_client(clp); | |
2521 | module_put_and_exit(0); | |
2522 | return 0; | |
1da177e4 LT |
2523 | } |
2524 | ||
2525 | /* | |
2526 | * Local variables: | |
2527 | * c-basic-offset: 8 | |
2528 | * End: | |
2529 | */ |