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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 LT |
44 | #include <linux/nfs_fs.h> |
45 | #include <linux/nfs_idmap.h> | |
5043e900 TM |
46 | #include <linux/kthread.h> |
47 | #include <linux/module.h> | |
9f958ab8 | 48 | #include <linux/random.h> |
8c7597f6 | 49 | #include <linux/ratelimit.h> |
1da177e4 LT |
50 | #include <linux/workqueue.h> |
51 | #include <linux/bitops.h> | |
0aaaf5c4 | 52 | #include <linux/jiffies.h> |
1da177e4 | 53 | |
4ce79717 | 54 | #include "nfs4_fs.h" |
1da177e4 LT |
55 | #include "callback.h" |
56 | #include "delegation.h" | |
24c8dbbb | 57 | #include "internal.h" |
974cec8c | 58 | #include "pnfs.h" |
bbe0a3aa | 59 | #include "netns.h" |
1da177e4 | 60 | |
e3c0fb7e CL |
61 | #define NFSDBG_FACILITY NFSDBG_STATE |
62 | ||
1da177e4 LT |
63 | #define OPENOWNER_POOL_SIZE 8 |
64 | ||
4ce79717 | 65 | const nfs4_stateid zero_stateid; |
1da177e4 LT |
66 | |
67 | static LIST_HEAD(nfs4_clientid_list); | |
68 | ||
591d71cb | 69 | int nfs4_init_clientid(struct nfs_client *clp, struct rpc_cred *cred) |
1da177e4 | 70 | { |
fd954ae1 TM |
71 | struct nfs4_setclientid_res clid = { |
72 | .clientid = clp->cl_clientid, | |
73 | .confirm = clp->cl_confirm, | |
74 | }; | |
f738f517 CL |
75 | unsigned short port; |
76 | int status; | |
bbe0a3aa | 77 | struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); |
f738f517 | 78 | |
fd954ae1 TM |
79 | if (test_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state)) |
80 | goto do_confirm; | |
bbe0a3aa | 81 | port = nn->nfs_callback_tcpport; |
f738f517 | 82 | if (clp->cl_addr.ss_family == AF_INET6) |
29dcc16a | 83 | port = nn->nfs_callback_tcpport6; |
f738f517 | 84 | |
bb8b27e5 TM |
85 | status = nfs4_proc_setclientid(clp, NFS4_CALLBACK, port, cred, &clid); |
86 | if (status != 0) | |
87 | goto out; | |
fd954ae1 TM |
88 | clp->cl_clientid = clid.clientid; |
89 | clp->cl_confirm = clid.confirm; | |
90 | set_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); | |
91 | do_confirm: | |
bb8b27e5 TM |
92 | status = nfs4_proc_setclientid_confirm(clp, &clid, cred); |
93 | if (status != 0) | |
94 | goto out; | |
fd954ae1 | 95 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
bb8b27e5 TM |
96 | nfs4_schedule_state_renewal(clp); |
97 | out: | |
1da177e4 LT |
98 | return status; |
99 | } | |
100 | ||
a7b72103 | 101 | struct rpc_cred *nfs4_get_machine_cred_locked(struct nfs_client *clp) |
a2b2bb88 TM |
102 | { |
103 | struct rpc_cred *cred = NULL; | |
104 | ||
a2b2bb88 TM |
105 | if (clp->cl_machine_cred != NULL) |
106 | cred = get_rpccred(clp->cl_machine_cred); | |
a2b2bb88 TM |
107 | return cred; |
108 | } | |
109 | ||
110 | static void nfs4_clear_machine_cred(struct nfs_client *clp) | |
111 | { | |
112 | struct rpc_cred *cred; | |
113 | ||
114 | spin_lock(&clp->cl_lock); | |
115 | cred = clp->cl_machine_cred; | |
116 | clp->cl_machine_cred = NULL; | |
117 | spin_unlock(&clp->cl_lock); | |
118 | if (cred != NULL) | |
119 | put_rpccred(cred); | |
120 | } | |
121 | ||
24d292b8 CL |
122 | static struct rpc_cred * |
123 | nfs4_get_renew_cred_server_locked(struct nfs_server *server) | |
b4454fe1 | 124 | { |
24d292b8 | 125 | struct rpc_cred *cred = NULL; |
b4454fe1 | 126 | struct nfs4_state_owner *sp; |
9f958ab8 | 127 | struct rb_node *pos; |
b4454fe1 | 128 | |
24d292b8 CL |
129 | for (pos = rb_first(&server->state_owners); |
130 | pos != NULL; | |
131 | pos = rb_next(pos)) { | |
132 | sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); | |
b4454fe1 TM |
133 | if (list_empty(&sp->so_states)) |
134 | continue; | |
135 | cred = get_rpccred(sp->so_cred); | |
136 | break; | |
137 | } | |
138 | return cred; | |
139 | } | |
140 | ||
24d292b8 CL |
141 | /** |
142 | * nfs4_get_renew_cred_locked - Acquire credential for a renew operation | |
143 | * @clp: client state handle | |
144 | * | |
145 | * Returns an rpc_cred with reference count bumped, or NULL. | |
146 | * Caller must hold clp->cl_lock. | |
147 | */ | |
148 | struct rpc_cred *nfs4_get_renew_cred_locked(struct nfs_client *clp) | |
149 | { | |
150 | struct rpc_cred *cred = NULL; | |
151 | struct nfs_server *server; | |
152 | ||
e49a29bd SP |
153 | /* Use machine credentials if available */ |
154 | cred = nfs4_get_machine_cred_locked(clp); | |
155 | if (cred != NULL) | |
156 | goto out; | |
157 | ||
24d292b8 CL |
158 | rcu_read_lock(); |
159 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { | |
160 | cred = nfs4_get_renew_cred_server_locked(server); | |
161 | if (cred != NULL) | |
162 | break; | |
163 | } | |
164 | rcu_read_unlock(); | |
e49a29bd SP |
165 | |
166 | out: | |
24d292b8 CL |
167 | return cred; |
168 | } | |
169 | ||
b4b82607 AA |
170 | #if defined(CONFIG_NFS_V4_1) |
171 | ||
9430fb6b RL |
172 | static int nfs41_setup_state_renewal(struct nfs_client *clp) |
173 | { | |
174 | int status; | |
175 | struct nfs_fsinfo fsinfo; | |
176 | ||
d6fb79d4 AA |
177 | if (!test_bit(NFS_CS_CHECK_LEASE_TIME, &clp->cl_res_state)) { |
178 | nfs4_schedule_state_renewal(clp); | |
179 | return 0; | |
180 | } | |
181 | ||
9430fb6b RL |
182 | status = nfs4_proc_get_lease_time(clp, &fsinfo); |
183 | if (status == 0) { | |
184 | /* Update lease time and schedule renewal */ | |
185 | spin_lock(&clp->cl_lock); | |
186 | clp->cl_lease_time = fsinfo.lease_time * HZ; | |
187 | clp->cl_last_renewal = jiffies; | |
188 | spin_unlock(&clp->cl_lock); | |
189 | ||
190 | nfs4_schedule_state_renewal(clp); | |
191 | } | |
192 | ||
193 | return status; | |
194 | } | |
195 | ||
42acd021 AA |
196 | /* |
197 | * Back channel returns NFS4ERR_DELAY for new requests when | |
198 | * NFS4_SESSION_DRAINING is set so there is no work to be done when draining | |
199 | * is ended. | |
200 | */ | |
5601a00d | 201 | static void nfs4_end_drain_session(struct nfs_client *clp) |
9dfdf404 | 202 | { |
5601a00d | 203 | struct nfs4_session *ses = clp->cl_session; |
961a828d | 204 | struct nfs4_slot_table *tbl; |
689cf5c1 AB |
205 | int max_slots; |
206 | ||
a2118c33 TM |
207 | if (ses == NULL) |
208 | return; | |
961a828d | 209 | tbl = &ses->fc_slot_table; |
a2118c33 | 210 | if (test_and_clear_bit(NFS4_SESSION_DRAINING, &ses->session_state)) { |
961a828d TM |
211 | spin_lock(&tbl->slot_tbl_lock); |
212 | max_slots = tbl->max_slots; | |
689cf5c1 | 213 | while (max_slots--) { |
961a828d TM |
214 | if (rpc_wake_up_first(&tbl->slot_tbl_waitq, |
215 | nfs4_set_task_privileged, | |
216 | NULL) == NULL) | |
689cf5c1 | 217 | break; |
689cf5c1 | 218 | } |
961a828d | 219 | spin_unlock(&tbl->slot_tbl_lock); |
689cf5c1 | 220 | } |
9dfdf404 RL |
221 | } |
222 | ||
42acd021 | 223 | static int nfs4_wait_on_slot_tbl(struct nfs4_slot_table *tbl) |
9dfdf404 | 224 | { |
9dfdf404 | 225 | spin_lock(&tbl->slot_tbl_lock); |
b6bf6e7d | 226 | if (tbl->highest_used_slotid != NFS4_NO_SLOT) { |
42acd021 | 227 | INIT_COMPLETION(tbl->complete); |
9dfdf404 | 228 | spin_unlock(&tbl->slot_tbl_lock); |
42acd021 | 229 | return wait_for_completion_interruptible(&tbl->complete); |
9dfdf404 RL |
230 | } |
231 | spin_unlock(&tbl->slot_tbl_lock); | |
232 | return 0; | |
233 | } | |
234 | ||
42acd021 AA |
235 | static int nfs4_begin_drain_session(struct nfs_client *clp) |
236 | { | |
237 | struct nfs4_session *ses = clp->cl_session; | |
238 | int ret = 0; | |
239 | ||
240 | set_bit(NFS4_SESSION_DRAINING, &ses->session_state); | |
241 | /* back channel */ | |
242 | ret = nfs4_wait_on_slot_tbl(&ses->bc_slot_table); | |
243 | if (ret) | |
244 | return ret; | |
245 | /* fore channel */ | |
246 | return nfs4_wait_on_slot_tbl(&ses->fc_slot_table); | |
247 | } | |
248 | ||
bda197f5 TM |
249 | static void nfs41_finish_session_reset(struct nfs_client *clp) |
250 | { | |
251 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); | |
252 | clear_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); | |
253 | /* create_session negotiated new slot table */ | |
254 | clear_bit(NFS4CLNT_RECALL_SLOT, &clp->cl_state); | |
255 | clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); | |
256 | nfs41_setup_state_renewal(clp); | |
257 | } | |
258 | ||
4d643d1d AA |
259 | int nfs41_init_clientid(struct nfs_client *clp, struct rpc_cred *cred) |
260 | { | |
261 | int status; | |
262 | ||
fd954ae1 TM |
263 | if (test_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state)) |
264 | goto do_confirm; | |
38045412 | 265 | nfs4_begin_drain_session(clp); |
4d643d1d | 266 | status = nfs4_proc_exchange_id(clp, cred); |
9430fb6b RL |
267 | if (status != 0) |
268 | goto out; | |
fd954ae1 TM |
269 | set_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
270 | do_confirm: | |
848f5bda | 271 | status = nfs4_proc_create_session(clp, cred); |
9430fb6b RL |
272 | if (status != 0) |
273 | goto out; | |
bda197f5 | 274 | nfs41_finish_session_reset(clp); |
9430fb6b RL |
275 | nfs_mark_client_ready(clp, NFS_CS_READY); |
276 | out: | |
4d643d1d AA |
277 | return status; |
278 | } | |
279 | ||
b4b82607 AA |
280 | struct rpc_cred *nfs4_get_exchange_id_cred(struct nfs_client *clp) |
281 | { | |
282 | struct rpc_cred *cred; | |
283 | ||
284 | spin_lock(&clp->cl_lock); | |
285 | cred = nfs4_get_machine_cred_locked(clp); | |
286 | spin_unlock(&clp->cl_lock); | |
287 | return cred; | |
288 | } | |
289 | ||
290 | #endif /* CONFIG_NFS_V4_1 */ | |
291 | ||
24d292b8 CL |
292 | static struct rpc_cred * |
293 | nfs4_get_setclientid_cred_server(struct nfs_server *server) | |
286d7d6a | 294 | { |
24d292b8 CL |
295 | struct nfs_client *clp = server->nfs_client; |
296 | struct rpc_cred *cred = NULL; | |
286d7d6a | 297 | struct nfs4_state_owner *sp; |
9f958ab8 | 298 | struct rb_node *pos; |
24d292b8 CL |
299 | |
300 | spin_lock(&clp->cl_lock); | |
301 | pos = rb_first(&server->state_owners); | |
302 | if (pos != NULL) { | |
303 | sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); | |
304 | cred = get_rpccred(sp->so_cred); | |
305 | } | |
306 | spin_unlock(&clp->cl_lock); | |
307 | return cred; | |
308 | } | |
309 | ||
310 | /** | |
311 | * nfs4_get_setclientid_cred - Acquire credential for a setclientid operation | |
312 | * @clp: client state handle | |
313 | * | |
314 | * Returns an rpc_cred with reference count bumped, or NULL. | |
315 | */ | |
316 | struct rpc_cred *nfs4_get_setclientid_cred(struct nfs_client *clp) | |
317 | { | |
318 | struct nfs_server *server; | |
a2b2bb88 | 319 | struct rpc_cred *cred; |
286d7d6a | 320 | |
6dc9d57a TM |
321 | spin_lock(&clp->cl_lock); |
322 | cred = nfs4_get_machine_cred_locked(clp); | |
24d292b8 | 323 | spin_unlock(&clp->cl_lock); |
a2b2bb88 TM |
324 | if (cred != NULL) |
325 | goto out; | |
24d292b8 CL |
326 | |
327 | rcu_read_lock(); | |
328 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { | |
329 | cred = nfs4_get_setclientid_cred_server(server); | |
330 | if (cred != NULL) | |
331 | break; | |
286d7d6a | 332 | } |
24d292b8 CL |
333 | rcu_read_unlock(); |
334 | ||
a2b2bb88 TM |
335 | out: |
336 | return cred; | |
286d7d6a TM |
337 | } |
338 | ||
1da177e4 | 339 | static struct nfs4_state_owner * |
24d292b8 | 340 | nfs4_find_state_owner_locked(struct nfs_server *server, struct rpc_cred *cred) |
1da177e4 | 341 | { |
24d292b8 | 342 | struct rb_node **p = &server->state_owners.rb_node, |
9f958ab8 | 343 | *parent = NULL; |
414adf14 | 344 | struct nfs4_state_owner *sp; |
1da177e4 | 345 | |
9f958ab8 TM |
346 | while (*p != NULL) { |
347 | parent = *p; | |
24d292b8 | 348 | sp = rb_entry(parent, struct nfs4_state_owner, so_server_node); |
9f958ab8 TM |
349 | |
350 | if (cred < sp->so_cred) | |
351 | p = &parent->rb_left; | |
352 | else if (cred > sp->so_cred) | |
353 | p = &parent->rb_right; | |
354 | else { | |
0aaaf5c4 CL |
355 | if (!list_empty(&sp->so_lru)) |
356 | list_del_init(&sp->so_lru); | |
9f958ab8 | 357 | atomic_inc(&sp->so_count); |
414adf14 | 358 | return sp; |
9f958ab8 | 359 | } |
1da177e4 | 360 | } |
414adf14 | 361 | return NULL; |
1da177e4 LT |
362 | } |
363 | ||
9f958ab8 | 364 | static struct nfs4_state_owner * |
24d292b8 | 365 | nfs4_insert_state_owner_locked(struct nfs4_state_owner *new) |
9f958ab8 | 366 | { |
24d292b8 CL |
367 | struct nfs_server *server = new->so_server; |
368 | struct rb_node **p = &server->state_owners.rb_node, | |
9f958ab8 TM |
369 | *parent = NULL; |
370 | struct nfs4_state_owner *sp; | |
9157c31d | 371 | int err; |
9f958ab8 TM |
372 | |
373 | while (*p != NULL) { | |
374 | parent = *p; | |
24d292b8 | 375 | sp = rb_entry(parent, struct nfs4_state_owner, so_server_node); |
9f958ab8 TM |
376 | |
377 | if (new->so_cred < sp->so_cred) | |
378 | p = &parent->rb_left; | |
379 | else if (new->so_cred > sp->so_cred) | |
380 | p = &parent->rb_right; | |
381 | else { | |
0aaaf5c4 CL |
382 | if (!list_empty(&sp->so_lru)) |
383 | list_del_init(&sp->so_lru); | |
9f958ab8 TM |
384 | atomic_inc(&sp->so_count); |
385 | return sp; | |
386 | } | |
387 | } | |
48c22eb2 | 388 | err = ida_get_new(&server->openowner_id, &new->so_seqid.owner_id); |
9157c31d TM |
389 | if (err) |
390 | return ERR_PTR(err); | |
24d292b8 CL |
391 | rb_link_node(&new->so_server_node, parent, p); |
392 | rb_insert_color(&new->so_server_node, &server->state_owners); | |
9f958ab8 TM |
393 | return new; |
394 | } | |
395 | ||
396 | static void | |
24d292b8 | 397 | nfs4_remove_state_owner_locked(struct nfs4_state_owner *sp) |
9f958ab8 | 398 | { |
24d292b8 CL |
399 | struct nfs_server *server = sp->so_server; |
400 | ||
401 | if (!RB_EMPTY_NODE(&sp->so_server_node)) | |
402 | rb_erase(&sp->so_server_node, &server->state_owners); | |
48c22eb2 | 403 | ida_remove(&server->openowner_id, sp->so_seqid.owner_id); |
9f958ab8 TM |
404 | } |
405 | ||
7ba127ab TM |
406 | static void |
407 | nfs4_init_seqid_counter(struct nfs_seqid_counter *sc) | |
408 | { | |
95b72eb0 | 409 | sc->create_time = ktime_get(); |
7ba127ab TM |
410 | sc->flags = 0; |
411 | sc->counter = 0; | |
412 | spin_lock_init(&sc->lock); | |
413 | INIT_LIST_HEAD(&sc->list); | |
414 | rpc_init_wait_queue(&sc->wait, "Seqid_waitqueue"); | |
415 | } | |
416 | ||
417 | static void | |
418 | nfs4_destroy_seqid_counter(struct nfs_seqid_counter *sc) | |
419 | { | |
420 | rpc_destroy_wait_queue(&sc->wait); | |
421 | } | |
422 | ||
1da177e4 LT |
423 | /* |
424 | * nfs4_alloc_state_owner(): this is called on the OPEN or CREATE path to | |
425 | * create a new state_owner. | |
426 | * | |
427 | */ | |
428 | static struct nfs4_state_owner * | |
d1e284d5 TM |
429 | nfs4_alloc_state_owner(struct nfs_server *server, |
430 | struct rpc_cred *cred, | |
431 | gfp_t gfp_flags) | |
1da177e4 LT |
432 | { |
433 | struct nfs4_state_owner *sp; | |
434 | ||
d1e284d5 | 435 | sp = kzalloc(sizeof(*sp), gfp_flags); |
1da177e4 LT |
436 | if (!sp) |
437 | return NULL; | |
d1e284d5 TM |
438 | sp->so_server = server; |
439 | sp->so_cred = get_rpccred(cred); | |
ec073428 | 440 | spin_lock_init(&sp->so_lock); |
1da177e4 | 441 | INIT_LIST_HEAD(&sp->so_states); |
7ba127ab | 442 | nfs4_init_seqid_counter(&sp->so_seqid); |
1da177e4 | 443 | atomic_set(&sp->so_count, 1); |
0aaaf5c4 | 444 | INIT_LIST_HEAD(&sp->so_lru); |
1da177e4 LT |
445 | return sp; |
446 | } | |
447 | ||
1d2e88e7 | 448 | static void |
1da177e4 LT |
449 | nfs4_drop_state_owner(struct nfs4_state_owner *sp) |
450 | { | |
c77365c9 TM |
451 | struct rb_node *rb_node = &sp->so_server_node; |
452 | ||
453 | if (!RB_EMPTY_NODE(rb_node)) { | |
24d292b8 CL |
454 | struct nfs_server *server = sp->so_server; |
455 | struct nfs_client *clp = server->nfs_client; | |
9f958ab8 TM |
456 | |
457 | spin_lock(&clp->cl_lock); | |
c77365c9 TM |
458 | if (!RB_EMPTY_NODE(rb_node)) { |
459 | rb_erase(rb_node, &server->state_owners); | |
460 | RB_CLEAR_NODE(rb_node); | |
461 | } | |
9f958ab8 TM |
462 | spin_unlock(&clp->cl_lock); |
463 | } | |
1da177e4 LT |
464 | } |
465 | ||
0aaaf5c4 CL |
466 | static void nfs4_free_state_owner(struct nfs4_state_owner *sp) |
467 | { | |
7ba127ab | 468 | nfs4_destroy_seqid_counter(&sp->so_seqid); |
0aaaf5c4 CL |
469 | put_rpccred(sp->so_cred); |
470 | kfree(sp); | |
471 | } | |
472 | ||
473 | static void nfs4_gc_state_owners(struct nfs_server *server) | |
474 | { | |
475 | struct nfs_client *clp = server->nfs_client; | |
476 | struct nfs4_state_owner *sp, *tmp; | |
477 | unsigned long time_min, time_max; | |
478 | LIST_HEAD(doomed); | |
479 | ||
480 | spin_lock(&clp->cl_lock); | |
481 | time_max = jiffies; | |
482 | time_min = (long)time_max - (long)clp->cl_lease_time; | |
483 | list_for_each_entry_safe(sp, tmp, &server->state_owners_lru, so_lru) { | |
484 | /* NB: LRU is sorted so that oldest is at the head */ | |
485 | if (time_in_range(sp->so_expires, time_min, time_max)) | |
486 | break; | |
487 | list_move(&sp->so_lru, &doomed); | |
488 | nfs4_remove_state_owner_locked(sp); | |
489 | } | |
490 | spin_unlock(&clp->cl_lock); | |
491 | ||
492 | list_for_each_entry_safe(sp, tmp, &doomed, so_lru) { | |
493 | list_del(&sp->so_lru); | |
494 | nfs4_free_state_owner(sp); | |
495 | } | |
496 | } | |
497 | ||
24d292b8 CL |
498 | /** |
499 | * nfs4_get_state_owner - Look up a state owner given a credential | |
500 | * @server: nfs_server to search | |
501 | * @cred: RPC credential to match | |
502 | * | |
503 | * Returns a pointer to an instantiated nfs4_state_owner struct, or NULL. | |
504 | */ | |
505 | struct nfs4_state_owner *nfs4_get_state_owner(struct nfs_server *server, | |
d1e284d5 TM |
506 | struct rpc_cred *cred, |
507 | gfp_t gfp_flags) | |
1da177e4 | 508 | { |
7539bbab | 509 | struct nfs_client *clp = server->nfs_client; |
1da177e4 LT |
510 | struct nfs4_state_owner *sp, *new; |
511 | ||
1da177e4 | 512 | spin_lock(&clp->cl_lock); |
24d292b8 | 513 | sp = nfs4_find_state_owner_locked(server, cred); |
1da177e4 | 514 | spin_unlock(&clp->cl_lock); |
1da177e4 | 515 | if (sp != NULL) |
0aaaf5c4 | 516 | goto out; |
d1e284d5 | 517 | new = nfs4_alloc_state_owner(server, cred, gfp_flags); |
9f958ab8 | 518 | if (new == NULL) |
0aaaf5c4 | 519 | goto out; |
9157c31d TM |
520 | do { |
521 | if (ida_pre_get(&server->openowner_id, gfp_flags) == 0) | |
522 | break; | |
523 | spin_lock(&clp->cl_lock); | |
524 | sp = nfs4_insert_state_owner_locked(new); | |
525 | spin_unlock(&clp->cl_lock); | |
526 | } while (sp == ERR_PTR(-EAGAIN)); | |
d1e284d5 TM |
527 | if (sp != new) |
528 | nfs4_free_state_owner(new); | |
0aaaf5c4 CL |
529 | out: |
530 | nfs4_gc_state_owners(server); | |
9f958ab8 | 531 | return sp; |
1da177e4 LT |
532 | } |
533 | ||
24d292b8 CL |
534 | /** |
535 | * nfs4_put_state_owner - Release a nfs4_state_owner | |
536 | * @sp: state owner data to release | |
7bf97bc2 TM |
537 | * |
538 | * Note that we keep released state owners on an LRU | |
539 | * list. | |
540 | * This caches valid state owners so that they can be | |
541 | * reused, to avoid the OPEN_CONFIRM on minor version 0. | |
542 | * It also pins the uniquifier of dropped state owners for | |
543 | * a while, to ensure that those state owner names are | |
544 | * never reused. | |
24d292b8 | 545 | */ |
1da177e4 LT |
546 | void nfs4_put_state_owner(struct nfs4_state_owner *sp) |
547 | { | |
0aaaf5c4 CL |
548 | struct nfs_server *server = sp->so_server; |
549 | struct nfs_client *clp = server->nfs_client; | |
1da177e4 LT |
550 | |
551 | if (!atomic_dec_and_lock(&sp->so_count, &clp->cl_lock)) | |
552 | return; | |
0aaaf5c4 | 553 | |
7bf97bc2 TM |
554 | sp->so_expires = jiffies; |
555 | list_add_tail(&sp->so_lru, &server->state_owners_lru); | |
556 | spin_unlock(&clp->cl_lock); | |
0aaaf5c4 CL |
557 | } |
558 | ||
559 | /** | |
560 | * nfs4_purge_state_owners - Release all cached state owners | |
561 | * @server: nfs_server with cached state owners to release | |
562 | * | |
563 | * Called at umount time. Remaining state owners will be on | |
564 | * the LRU with ref count of zero. | |
565 | */ | |
566 | void nfs4_purge_state_owners(struct nfs_server *server) | |
567 | { | |
568 | struct nfs_client *clp = server->nfs_client; | |
569 | struct nfs4_state_owner *sp, *tmp; | |
570 | LIST_HEAD(doomed); | |
571 | ||
572 | spin_lock(&clp->cl_lock); | |
573 | list_for_each_entry_safe(sp, tmp, &server->state_owners_lru, so_lru) { | |
574 | list_move(&sp->so_lru, &doomed); | |
575 | nfs4_remove_state_owner_locked(sp); | |
576 | } | |
1da177e4 | 577 | spin_unlock(&clp->cl_lock); |
0aaaf5c4 CL |
578 | |
579 | list_for_each_entry_safe(sp, tmp, &doomed, so_lru) { | |
580 | list_del(&sp->so_lru); | |
581 | nfs4_free_state_owner(sp); | |
582 | } | |
1da177e4 LT |
583 | } |
584 | ||
585 | static struct nfs4_state * | |
586 | nfs4_alloc_open_state(void) | |
587 | { | |
588 | struct nfs4_state *state; | |
589 | ||
8535b2be | 590 | state = kzalloc(sizeof(*state), GFP_NOFS); |
1da177e4 LT |
591 | if (!state) |
592 | return NULL; | |
1da177e4 LT |
593 | atomic_set(&state->count, 1); |
594 | INIT_LIST_HEAD(&state->lock_states); | |
8d0a8a9d | 595 | spin_lock_init(&state->state_lock); |
8bda4e4c | 596 | seqlock_init(&state->seqlock); |
1da177e4 LT |
597 | return state; |
598 | } | |
599 | ||
4cecb76f | 600 | void |
dc0b027d | 601 | nfs4_state_set_mode_locked(struct nfs4_state *state, fmode_t fmode) |
4cecb76f | 602 | { |
dc0b027d | 603 | if (state->state == fmode) |
4cecb76f TM |
604 | return; |
605 | /* NB! List reordering - see the reclaim code for why. */ | |
dc0b027d TM |
606 | if ((fmode & FMODE_WRITE) != (state->state & FMODE_WRITE)) { |
607 | if (fmode & FMODE_WRITE) | |
4cecb76f TM |
608 | list_move(&state->open_states, &state->owner->so_states); |
609 | else | |
610 | list_move_tail(&state->open_states, &state->owner->so_states); | |
611 | } | |
dc0b027d | 612 | state->state = fmode; |
4cecb76f TM |
613 | } |
614 | ||
1da177e4 LT |
615 | static struct nfs4_state * |
616 | __nfs4_find_state_byowner(struct inode *inode, struct nfs4_state_owner *owner) | |
617 | { | |
618 | struct nfs_inode *nfsi = NFS_I(inode); | |
619 | struct nfs4_state *state; | |
620 | ||
621 | list_for_each_entry(state, &nfsi->open_states, inode_states) { | |
1c816efa | 622 | if (state->owner != owner) |
1da177e4 | 623 | continue; |
1c816efa | 624 | if (atomic_inc_not_zero(&state->count)) |
1da177e4 | 625 | return state; |
1da177e4 LT |
626 | } |
627 | return NULL; | |
628 | } | |
629 | ||
1da177e4 LT |
630 | static void |
631 | nfs4_free_open_state(struct nfs4_state *state) | |
632 | { | |
633 | kfree(state); | |
634 | } | |
635 | ||
636 | struct nfs4_state * | |
637 | nfs4_get_open_state(struct inode *inode, struct nfs4_state_owner *owner) | |
638 | { | |
639 | struct nfs4_state *state, *new; | |
640 | struct nfs_inode *nfsi = NFS_I(inode); | |
641 | ||
642 | spin_lock(&inode->i_lock); | |
643 | state = __nfs4_find_state_byowner(inode, owner); | |
644 | spin_unlock(&inode->i_lock); | |
645 | if (state) | |
646 | goto out; | |
647 | new = nfs4_alloc_open_state(); | |
ec073428 | 648 | spin_lock(&owner->so_lock); |
1da177e4 LT |
649 | spin_lock(&inode->i_lock); |
650 | state = __nfs4_find_state_byowner(inode, owner); | |
651 | if (state == NULL && new != NULL) { | |
652 | state = new; | |
1da177e4 LT |
653 | state->owner = owner; |
654 | atomic_inc(&owner->so_count); | |
655 | list_add(&state->inode_states, &nfsi->open_states); | |
0444d76a DC |
656 | ihold(inode); |
657 | state->inode = inode; | |
1da177e4 | 658 | spin_unlock(&inode->i_lock); |
ec073428 TM |
659 | /* Note: The reclaim code dictates that we add stateless |
660 | * and read-only stateids to the end of the list */ | |
661 | list_add_tail(&state->open_states, &owner->so_states); | |
662 | spin_unlock(&owner->so_lock); | |
1da177e4 LT |
663 | } else { |
664 | spin_unlock(&inode->i_lock); | |
ec073428 | 665 | spin_unlock(&owner->so_lock); |
1da177e4 LT |
666 | if (new) |
667 | nfs4_free_open_state(new); | |
668 | } | |
669 | out: | |
670 | return state; | |
671 | } | |
672 | ||
1da177e4 LT |
673 | void nfs4_put_open_state(struct nfs4_state *state) |
674 | { | |
675 | struct inode *inode = state->inode; | |
676 | struct nfs4_state_owner *owner = state->owner; | |
677 | ||
ec073428 | 678 | if (!atomic_dec_and_lock(&state->count, &owner->so_lock)) |
1da177e4 | 679 | return; |
ec073428 | 680 | spin_lock(&inode->i_lock); |
ba683031 | 681 | list_del(&state->inode_states); |
1da177e4 | 682 | list_del(&state->open_states); |
ec073428 TM |
683 | spin_unlock(&inode->i_lock); |
684 | spin_unlock(&owner->so_lock); | |
1da177e4 | 685 | iput(inode); |
1da177e4 LT |
686 | nfs4_free_open_state(state); |
687 | nfs4_put_state_owner(owner); | |
688 | } | |
689 | ||
690 | /* | |
83c9d41e | 691 | * Close the current file. |
1da177e4 | 692 | */ |
643168c2 | 693 | static void __nfs4_close(struct nfs4_state *state, |
8535b2be | 694 | fmode_t fmode, gfp_t gfp_mask, int wait) |
1da177e4 | 695 | { |
1da177e4 | 696 | struct nfs4_state_owner *owner = state->owner; |
003707c7 | 697 | int call_close = 0; |
dc0b027d | 698 | fmode_t newstate; |
1da177e4 LT |
699 | |
700 | atomic_inc(&owner->so_count); | |
1da177e4 | 701 | /* Protect against nfs4_find_state() */ |
ec073428 | 702 | spin_lock(&owner->so_lock); |
dc0b027d | 703 | switch (fmode & (FMODE_READ | FMODE_WRITE)) { |
e7616923 TM |
704 | case FMODE_READ: |
705 | state->n_rdonly--; | |
706 | break; | |
707 | case FMODE_WRITE: | |
708 | state->n_wronly--; | |
709 | break; | |
710 | case FMODE_READ|FMODE_WRITE: | |
711 | state->n_rdwr--; | |
712 | } | |
003707c7 | 713 | newstate = FMODE_READ|FMODE_WRITE; |
e7616923 | 714 | if (state->n_rdwr == 0) { |
003707c7 | 715 | if (state->n_rdonly == 0) { |
e7616923 | 716 | newstate &= ~FMODE_READ; |
003707c7 TM |
717 | call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags); |
718 | call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); | |
719 | } | |
720 | if (state->n_wronly == 0) { | |
e7616923 | 721 | newstate &= ~FMODE_WRITE; |
003707c7 TM |
722 | call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags); |
723 | call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); | |
724 | } | |
725 | if (newstate == 0) | |
726 | clear_bit(NFS_DELEGATED_STATE, &state->flags); | |
e7616923 | 727 | } |
003707c7 | 728 | nfs4_state_set_mode_locked(state, newstate); |
ec073428 | 729 | spin_unlock(&owner->so_lock); |
4cecb76f | 730 | |
003707c7 | 731 | if (!call_close) { |
b39e625b TM |
732 | nfs4_put_open_state(state); |
733 | nfs4_put_state_owner(owner); | |
1f7977c1 TM |
734 | } else |
735 | nfs4_do_close(state, gfp_mask, wait); | |
a49c3c77 TM |
736 | } |
737 | ||
643168c2 | 738 | void nfs4_close_state(struct nfs4_state *state, fmode_t fmode) |
a49c3c77 | 739 | { |
643168c2 | 740 | __nfs4_close(state, fmode, GFP_NOFS, 0); |
a49c3c77 TM |
741 | } |
742 | ||
643168c2 | 743 | void nfs4_close_sync(struct nfs4_state *state, fmode_t fmode) |
a49c3c77 | 744 | { |
643168c2 | 745 | __nfs4_close(state, fmode, GFP_KERNEL, 1); |
1da177e4 LT |
746 | } |
747 | ||
748 | /* | |
749 | * Search the state->lock_states for an existing lock_owner | |
750 | * that is compatible with current->files | |
751 | */ | |
752 | static struct nfs4_lock_state * | |
77041ed9 | 753 | __nfs4_find_lock_state(struct nfs4_state *state, fl_owner_t fl_owner, pid_t fl_pid, unsigned int type) |
1da177e4 LT |
754 | { |
755 | struct nfs4_lock_state *pos; | |
756 | list_for_each_entry(pos, &state->lock_states, ls_locks) { | |
77041ed9 | 757 | if (type != NFS4_ANY_LOCK_TYPE && pos->ls_owner.lo_type != type) |
1da177e4 | 758 | continue; |
77041ed9 TM |
759 | switch (pos->ls_owner.lo_type) { |
760 | case NFS4_POSIX_LOCK_TYPE: | |
761 | if (pos->ls_owner.lo_u.posix_owner != fl_owner) | |
762 | continue; | |
763 | break; | |
764 | case NFS4_FLOCK_LOCK_TYPE: | |
765 | if (pos->ls_owner.lo_u.flock_owner != fl_pid) | |
766 | continue; | |
767 | } | |
1da177e4 LT |
768 | atomic_inc(&pos->ls_count); |
769 | return pos; | |
770 | } | |
771 | return NULL; | |
772 | } | |
773 | ||
1da177e4 LT |
774 | /* |
775 | * Return a compatible lock_state. If no initialized lock_state structure | |
776 | * exists, return an uninitialized one. | |
777 | * | |
1da177e4 | 778 | */ |
77041ed9 | 779 | static struct nfs4_lock_state *nfs4_alloc_lock_state(struct nfs4_state *state, fl_owner_t fl_owner, pid_t fl_pid, unsigned int type) |
1da177e4 LT |
780 | { |
781 | struct nfs4_lock_state *lsp; | |
24d292b8 | 782 | struct nfs_server *server = state->owner->so_server; |
1da177e4 | 783 | |
8535b2be | 784 | lsp = kzalloc(sizeof(*lsp), GFP_NOFS); |
1da177e4 LT |
785 | if (lsp == NULL) |
786 | return NULL; | |
7ba127ab | 787 | nfs4_init_seqid_counter(&lsp->ls_seqid); |
1da177e4 | 788 | atomic_set(&lsp->ls_count, 1); |
b64aec8d | 789 | lsp->ls_state = state; |
77041ed9 TM |
790 | lsp->ls_owner.lo_type = type; |
791 | switch (lsp->ls_owner.lo_type) { | |
792 | case NFS4_FLOCK_LOCK_TYPE: | |
793 | lsp->ls_owner.lo_u.flock_owner = fl_pid; | |
794 | break; | |
795 | case NFS4_POSIX_LOCK_TYPE: | |
796 | lsp->ls_owner.lo_u.posix_owner = fl_owner; | |
797 | break; | |
798 | default: | |
d2d7ce28 | 799 | goto out_free; |
77041ed9 | 800 | } |
48c22eb2 TM |
801 | lsp->ls_seqid.owner_id = ida_simple_get(&server->lockowner_id, 0, 0, GFP_NOFS); |
802 | if (lsp->ls_seqid.owner_id < 0) | |
d2d7ce28 | 803 | goto out_free; |
8d0a8a9d | 804 | INIT_LIST_HEAD(&lsp->ls_locks); |
1da177e4 | 805 | return lsp; |
d2d7ce28 TM |
806 | out_free: |
807 | kfree(lsp); | |
808 | return NULL; | |
1da177e4 LT |
809 | } |
810 | ||
5ae67c4f | 811 | void nfs4_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp) |
9f958ab8 | 812 | { |
48c22eb2 | 813 | ida_simple_remove(&server->lockowner_id, lsp->ls_seqid.owner_id); |
7ba127ab | 814 | nfs4_destroy_seqid_counter(&lsp->ls_seqid); |
9f958ab8 TM |
815 | kfree(lsp); |
816 | } | |
817 | ||
1da177e4 LT |
818 | /* |
819 | * Return a compatible lock_state. If no initialized lock_state structure | |
820 | * exists, return an uninitialized one. | |
821 | * | |
1da177e4 | 822 | */ |
77041ed9 | 823 | static struct nfs4_lock_state *nfs4_get_lock_state(struct nfs4_state *state, fl_owner_t owner, pid_t pid, unsigned int type) |
1da177e4 | 824 | { |
8d0a8a9d | 825 | struct nfs4_lock_state *lsp, *new = NULL; |
1da177e4 | 826 | |
8d0a8a9d TM |
827 | for(;;) { |
828 | spin_lock(&state->state_lock); | |
77041ed9 | 829 | lsp = __nfs4_find_lock_state(state, owner, pid, type); |
8d0a8a9d TM |
830 | if (lsp != NULL) |
831 | break; | |
832 | if (new != NULL) { | |
8d0a8a9d TM |
833 | list_add(&new->ls_locks, &state->lock_states); |
834 | set_bit(LK_STATE_IN_USE, &state->flags); | |
835 | lsp = new; | |
836 | new = NULL; | |
837 | break; | |
838 | } | |
839 | spin_unlock(&state->state_lock); | |
77041ed9 | 840 | new = nfs4_alloc_lock_state(state, owner, pid, type); |
8d0a8a9d TM |
841 | if (new == NULL) |
842 | return NULL; | |
843 | } | |
844 | spin_unlock(&state->state_lock); | |
9f958ab8 | 845 | if (new != NULL) |
5ae67c4f | 846 | nfs4_free_lock_state(state->owner->so_server, new); |
1da177e4 LT |
847 | return lsp; |
848 | } | |
849 | ||
850 | /* | |
8d0a8a9d TM |
851 | * Release reference to lock_state, and free it if we see that |
852 | * it is no longer in use | |
1da177e4 | 853 | */ |
faf5f49c | 854 | void nfs4_put_lock_state(struct nfs4_lock_state *lsp) |
1da177e4 | 855 | { |
8d0a8a9d | 856 | struct nfs4_state *state; |
1da177e4 | 857 | |
8d0a8a9d TM |
858 | if (lsp == NULL) |
859 | return; | |
860 | state = lsp->ls_state; | |
861 | if (!atomic_dec_and_lock(&lsp->ls_count, &state->state_lock)) | |
862 | return; | |
863 | list_del(&lsp->ls_locks); | |
864 | if (list_empty(&state->lock_states)) | |
865 | clear_bit(LK_STATE_IN_USE, &state->flags); | |
866 | spin_unlock(&state->state_lock); | |
795a88c9 | 867 | if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) { |
cf470c3e TM |
868 | if (nfs4_release_lockowner(lsp) == 0) |
869 | return; | |
870 | } | |
5ae67c4f | 871 | nfs4_free_lock_state(lsp->ls_state->owner->so_server, lsp); |
1da177e4 LT |
872 | } |
873 | ||
8d0a8a9d | 874 | static void nfs4_fl_copy_lock(struct file_lock *dst, struct file_lock *src) |
1da177e4 | 875 | { |
8d0a8a9d | 876 | struct nfs4_lock_state *lsp = src->fl_u.nfs4_fl.owner; |
1da177e4 | 877 | |
8d0a8a9d TM |
878 | dst->fl_u.nfs4_fl.owner = lsp; |
879 | atomic_inc(&lsp->ls_count); | |
880 | } | |
1da177e4 | 881 | |
8d0a8a9d | 882 | static void nfs4_fl_release_lock(struct file_lock *fl) |
1da177e4 | 883 | { |
8d0a8a9d | 884 | nfs4_put_lock_state(fl->fl_u.nfs4_fl.owner); |
1da177e4 LT |
885 | } |
886 | ||
6aed6285 | 887 | static const struct file_lock_operations nfs4_fl_lock_ops = { |
8d0a8a9d TM |
888 | .fl_copy_lock = nfs4_fl_copy_lock, |
889 | .fl_release_private = nfs4_fl_release_lock, | |
890 | }; | |
891 | ||
892 | int nfs4_set_lock_state(struct nfs4_state *state, struct file_lock *fl) | |
1da177e4 | 893 | { |
8d0a8a9d TM |
894 | struct nfs4_lock_state *lsp; |
895 | ||
896 | if (fl->fl_ops != NULL) | |
897 | return 0; | |
77041ed9 TM |
898 | if (fl->fl_flags & FL_POSIX) |
899 | lsp = nfs4_get_lock_state(state, fl->fl_owner, 0, NFS4_POSIX_LOCK_TYPE); | |
900 | else if (fl->fl_flags & FL_FLOCK) | |
17280175 TM |
901 | lsp = nfs4_get_lock_state(state, NULL, fl->fl_pid, |
902 | NFS4_FLOCK_LOCK_TYPE); | |
77041ed9 TM |
903 | else |
904 | return -EINVAL; | |
8d0a8a9d TM |
905 | if (lsp == NULL) |
906 | return -ENOMEM; | |
907 | fl->fl_u.nfs4_fl.owner = lsp; | |
908 | fl->fl_ops = &nfs4_fl_lock_ops; | |
909 | return 0; | |
1da177e4 LT |
910 | } |
911 | ||
4fc8796d | 912 | static bool nfs4_copy_lock_stateid(nfs4_stateid *dst, struct nfs4_state *state, |
2a369153 | 913 | const struct nfs_lockowner *lockowner) |
1da177e4 | 914 | { |
8d0a8a9d | 915 | struct nfs4_lock_state *lsp; |
2a369153 TM |
916 | fl_owner_t fl_owner; |
917 | pid_t fl_pid; | |
4fc8796d | 918 | bool ret = false; |
1da177e4 | 919 | |
2a369153 TM |
920 | |
921 | if (lockowner == NULL) | |
922 | goto out; | |
923 | ||
8d0a8a9d | 924 | if (test_bit(LK_STATE_IN_USE, &state->flags) == 0) |
4fc8796d | 925 | goto out; |
1da177e4 | 926 | |
2a369153 TM |
927 | fl_owner = lockowner->l_owner; |
928 | fl_pid = lockowner->l_pid; | |
8d0a8a9d | 929 | spin_lock(&state->state_lock); |
77041ed9 | 930 | lsp = __nfs4_find_lock_state(state, fl_owner, fl_pid, NFS4_ANY_LOCK_TYPE); |
795a88c9 | 931 | if (lsp != NULL && test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0) { |
f597c537 | 932 | nfs4_stateid_copy(dst, &lsp->ls_stateid); |
4fc8796d TM |
933 | ret = true; |
934 | } | |
8d0a8a9d | 935 | spin_unlock(&state->state_lock); |
1da177e4 | 936 | nfs4_put_lock_state(lsp); |
4fc8796d TM |
937 | out: |
938 | return ret; | |
939 | } | |
940 | ||
941 | static void nfs4_copy_open_stateid(nfs4_stateid *dst, struct nfs4_state *state) | |
942 | { | |
943 | int seq; | |
944 | ||
945 | do { | |
946 | seq = read_seqbegin(&state->seqlock); | |
947 | nfs4_stateid_copy(dst, &state->stateid); | |
948 | } while (read_seqretry(&state->seqlock, seq)); | |
949 | } | |
950 | ||
951 | /* | |
952 | * Byte-range lock aware utility to initialize the stateid of read/write | |
953 | * requests. | |
954 | */ | |
955 | void nfs4_select_rw_stateid(nfs4_stateid *dst, struct nfs4_state *state, | |
2a369153 | 956 | fmode_t fmode, const struct nfs_lockowner *lockowner) |
4fc8796d TM |
957 | { |
958 | if (nfs4_copy_delegation_stateid(dst, state->inode, fmode)) | |
959 | return; | |
2a369153 | 960 | if (nfs4_copy_lock_stateid(dst, state, lockowner)) |
4fc8796d TM |
961 | return; |
962 | nfs4_copy_open_stateid(dst, state); | |
1da177e4 LT |
963 | } |
964 | ||
8535b2be | 965 | struct nfs_seqid *nfs_alloc_seqid(struct nfs_seqid_counter *counter, gfp_t gfp_mask) |
cee54fc9 | 966 | { |
cee54fc9 TM |
967 | struct nfs_seqid *new; |
968 | ||
8535b2be | 969 | new = kmalloc(sizeof(*new), gfp_mask); |
cee54fc9 TM |
970 | if (new != NULL) { |
971 | new->sequence = counter; | |
2f74c0a0 | 972 | INIT_LIST_HEAD(&new->list); |
4601df20 | 973 | new->task = NULL; |
cee54fc9 TM |
974 | } |
975 | return new; | |
976 | } | |
977 | ||
72211dbe | 978 | void nfs_release_seqid(struct nfs_seqid *seqid) |
1da177e4 | 979 | { |
4601df20 | 980 | struct nfs_seqid_counter *sequence; |
cee54fc9 | 981 | |
4601df20 TM |
982 | if (list_empty(&seqid->list)) |
983 | return; | |
984 | sequence = seqid->sequence; | |
985 | spin_lock(&sequence->lock); | |
986 | list_del_init(&seqid->list); | |
987 | if (!list_empty(&sequence->list)) { | |
988 | struct nfs_seqid *next; | |
989 | ||
990 | next = list_first_entry(&sequence->list, | |
991 | struct nfs_seqid, list); | |
992 | rpc_wake_up_queued_task(&sequence->wait, next->task); | |
2f74c0a0 | 993 | } |
4601df20 | 994 | spin_unlock(&sequence->lock); |
72211dbe TM |
995 | } |
996 | ||
997 | void nfs_free_seqid(struct nfs_seqid *seqid) | |
998 | { | |
999 | nfs_release_seqid(seqid); | |
cee54fc9 | 1000 | kfree(seqid); |
1da177e4 LT |
1001 | } |
1002 | ||
1003 | /* | |
cee54fc9 TM |
1004 | * Increment the seqid if the OPEN/OPEN_DOWNGRADE/CLOSE succeeded, or |
1005 | * failed with a seqid incrementing error - | |
1006 | * see comments nfs_fs.h:seqid_mutating_error() | |
1007 | */ | |
88d90939 | 1008 | static void nfs_increment_seqid(int status, struct nfs_seqid *seqid) |
cee54fc9 | 1009 | { |
7ba127ab | 1010 | BUG_ON(list_first_entry(&seqid->sequence->list, struct nfs_seqid, list) != seqid); |
cee54fc9 TM |
1011 | switch (status) { |
1012 | case 0: | |
1013 | break; | |
1014 | case -NFS4ERR_BAD_SEQID: | |
6f43ddcc TM |
1015 | if (seqid->sequence->flags & NFS_SEQID_CONFIRMED) |
1016 | return; | |
9a3ba432 | 1017 | pr_warn_ratelimited("NFS: v4 server returned a bad" |
497799e7 DM |
1018 | " sequence-id error on an" |
1019 | " unconfirmed sequence %p!\n", | |
6f43ddcc | 1020 | seqid->sequence); |
cee54fc9 TM |
1021 | case -NFS4ERR_STALE_CLIENTID: |
1022 | case -NFS4ERR_STALE_STATEID: | |
1023 | case -NFS4ERR_BAD_STATEID: | |
1024 | case -NFS4ERR_BADXDR: | |
1025 | case -NFS4ERR_RESOURCE: | |
1026 | case -NFS4ERR_NOFILEHANDLE: | |
1027 | /* Non-seqid mutating errors */ | |
1028 | return; | |
1029 | }; | |
1030 | /* | |
1031 | * Note: no locking needed as we are guaranteed to be first | |
1032 | * on the sequence list | |
1033 | */ | |
1034 | seqid->sequence->counter++; | |
1035 | } | |
1036 | ||
1037 | void nfs_increment_open_seqid(int status, struct nfs_seqid *seqid) | |
1038 | { | |
34dc1ad7 BH |
1039 | struct nfs4_state_owner *sp = container_of(seqid->sequence, |
1040 | struct nfs4_state_owner, so_seqid); | |
1041 | struct nfs_server *server = sp->so_server; | |
1042 | ||
1043 | if (status == -NFS4ERR_BAD_SEQID) | |
1da177e4 | 1044 | nfs4_drop_state_owner(sp); |
34dc1ad7 BH |
1045 | if (!nfs4_has_session(server->nfs_client)) |
1046 | nfs_increment_seqid(status, seqid); | |
cee54fc9 TM |
1047 | } |
1048 | ||
1049 | /* | |
cee54fc9 TM |
1050 | * Increment the seqid if the LOCK/LOCKU succeeded, or |
1051 | * failed with a seqid incrementing error - | |
1052 | * see comments nfs_fs.h:seqid_mutating_error() | |
1053 | */ | |
1054 | void nfs_increment_lock_seqid(int status, struct nfs_seqid *seqid) | |
1055 | { | |
88d90939 | 1056 | nfs_increment_seqid(status, seqid); |
cee54fc9 TM |
1057 | } |
1058 | ||
1059 | int nfs_wait_on_sequence(struct nfs_seqid *seqid, struct rpc_task *task) | |
1060 | { | |
7ba127ab | 1061 | struct nfs_seqid_counter *sequence = seqid->sequence; |
cee54fc9 TM |
1062 | int status = 0; |
1063 | ||
1064 | spin_lock(&sequence->lock); | |
4601df20 | 1065 | seqid->task = task; |
2f74c0a0 TM |
1066 | if (list_empty(&seqid->list)) |
1067 | list_add_tail(&seqid->list, &sequence->list); | |
1068 | if (list_first_entry(&sequence->list, struct nfs_seqid, list) == seqid) | |
1069 | goto unlock; | |
5d00837b | 1070 | rpc_sleep_on(&sequence->wait, task, NULL); |
2f74c0a0 TM |
1071 | status = -EAGAIN; |
1072 | unlock: | |
cee54fc9 TM |
1073 | spin_unlock(&sequence->lock); |
1074 | return status; | |
1da177e4 LT |
1075 | } |
1076 | ||
e005e804 | 1077 | static int nfs4_run_state_manager(void *); |
1da177e4 | 1078 | |
e005e804 | 1079 | static void nfs4_clear_state_manager_bit(struct nfs_client *clp) |
433fbe4c TM |
1080 | { |
1081 | smp_mb__before_clear_bit(); | |
e005e804 | 1082 | clear_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state); |
433fbe4c | 1083 | smp_mb__after_clear_bit(); |
e005e804 | 1084 | wake_up_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING); |
433fbe4c TM |
1085 | rpc_wake_up(&clp->cl_rpcwaitq); |
1086 | } | |
1087 | ||
1da177e4 | 1088 | /* |
e005e804 | 1089 | * Schedule the nfs_client asynchronous state management routine |
1da177e4 | 1090 | */ |
b0d3ded1 | 1091 | void nfs4_schedule_state_manager(struct nfs_client *clp) |
1da177e4 | 1092 | { |
5043e900 | 1093 | struct task_struct *task; |
2446ab60 | 1094 | char buf[INET6_ADDRSTRLEN + sizeof("-manager") + 1]; |
1da177e4 | 1095 | |
e005e804 TM |
1096 | if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) != 0) |
1097 | return; | |
5043e900 TM |
1098 | __module_get(THIS_MODULE); |
1099 | atomic_inc(&clp->cl_count); | |
2446ab60 TM |
1100 | |
1101 | /* The rcu_read_lock() is not strictly necessary, as the state | |
1102 | * manager is the only thread that ever changes the rpc_xprt | |
1103 | * after it's initialized. At this point, we're single threaded. */ | |
1104 | rcu_read_lock(); | |
1105 | snprintf(buf, sizeof(buf), "%s-manager", | |
1106 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)); | |
1107 | rcu_read_unlock(); | |
1108 | task = kthread_run(nfs4_run_state_manager, clp, buf); | |
1109 | if (IS_ERR(task)) { | |
1110 | printk(KERN_ERR "%s: kthread_run: %ld\n", | |
1111 | __func__, PTR_ERR(task)); | |
1112 | nfs4_clear_state_manager_bit(clp); | |
1113 | nfs_put_client(clp); | |
1114 | module_put(THIS_MODULE); | |
1115 | } | |
1da177e4 LT |
1116 | } |
1117 | ||
1118 | /* | |
0400a6b0 | 1119 | * Schedule a lease recovery attempt |
1da177e4 | 1120 | */ |
0400a6b0 | 1121 | void nfs4_schedule_lease_recovery(struct nfs_client *clp) |
1da177e4 LT |
1122 | { |
1123 | if (!clp) | |
1124 | return; | |
e598d843 TM |
1125 | if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
1126 | set_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); | |
cc0a9843 TM |
1127 | dprintk("%s: scheduling lease recovery for server %s\n", __func__, |
1128 | clp->cl_hostname); | |
e005e804 | 1129 | nfs4_schedule_state_manager(clp); |
1da177e4 | 1130 | } |
9cb81968 | 1131 | EXPORT_SYMBOL_GPL(nfs4_schedule_lease_recovery); |
1da177e4 | 1132 | |
ad1e3968 TM |
1133 | /* |
1134 | * nfs40_handle_cb_pathdown - return all delegations after NFS4ERR_CB_PATH_DOWN | |
1135 | * @clp: client to process | |
1136 | * | |
1137 | * Set the NFS4CLNT_LEASE_EXPIRED state in order to force a | |
1138 | * resend of the SETCLIENTID and hence re-establish the | |
1139 | * callback channel. Then return all existing delegations. | |
1140 | */ | |
1141 | static void nfs40_handle_cb_pathdown(struct nfs_client *clp) | |
1142 | { | |
1143 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1144 | nfs_expire_all_delegations(clp); | |
cc0a9843 TM |
1145 | dprintk("%s: handling CB_PATHDOWN recovery for server %s\n", __func__, |
1146 | clp->cl_hostname); | |
ad1e3968 TM |
1147 | } |
1148 | ||
042b60be TM |
1149 | void nfs4_schedule_path_down_recovery(struct nfs_client *clp) |
1150 | { | |
ad1e3968 | 1151 | nfs40_handle_cb_pathdown(clp); |
042b60be TM |
1152 | nfs4_schedule_state_manager(clp); |
1153 | } | |
1154 | ||
f9feab1e | 1155 | static int nfs4_state_mark_reclaim_reboot(struct nfs_client *clp, struct nfs4_state *state) |
b79a4a1b TM |
1156 | { |
1157 | ||
1158 | set_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); | |
1159 | /* Don't recover state that expired before the reboot */ | |
1160 | if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) { | |
1161 | clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); | |
1162 | return 0; | |
1163 | } | |
7eff03ae | 1164 | set_bit(NFS_OWNER_RECLAIM_REBOOT, &state->owner->so_flags); |
b79a4a1b TM |
1165 | set_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state); |
1166 | return 1; | |
1167 | } | |
1168 | ||
f9feab1e | 1169 | static int nfs4_state_mark_reclaim_nograce(struct nfs_client *clp, struct nfs4_state *state) |
b79a4a1b TM |
1170 | { |
1171 | set_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags); | |
1172 | clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); | |
7eff03ae | 1173 | set_bit(NFS_OWNER_RECLAIM_NOGRACE, &state->owner->so_flags); |
b79a4a1b TM |
1174 | set_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state); |
1175 | return 1; | |
1176 | } | |
1177 | ||
0400a6b0 TM |
1178 | void nfs4_schedule_stateid_recovery(const struct nfs_server *server, struct nfs4_state *state) |
1179 | { | |
1180 | struct nfs_client *clp = server->nfs_client; | |
1181 | ||
1182 | nfs4_state_mark_reclaim_nograce(clp, state); | |
cc0a9843 TM |
1183 | dprintk("%s: scheduling stateid recovery for server %s\n", __func__, |
1184 | clp->cl_hostname); | |
0400a6b0 TM |
1185 | nfs4_schedule_state_manager(clp); |
1186 | } | |
9cb81968 | 1187 | EXPORT_SYMBOL_GPL(nfs4_schedule_stateid_recovery); |
0400a6b0 | 1188 | |
a1d0b5ee TM |
1189 | void nfs_inode_find_state_and_recover(struct inode *inode, |
1190 | const nfs4_stateid *stateid) | |
1191 | { | |
1192 | struct nfs_client *clp = NFS_SERVER(inode)->nfs_client; | |
1193 | struct nfs_inode *nfsi = NFS_I(inode); | |
1194 | struct nfs_open_context *ctx; | |
1195 | struct nfs4_state *state; | |
1196 | bool found = false; | |
1197 | ||
1198 | spin_lock(&inode->i_lock); | |
1199 | list_for_each_entry(ctx, &nfsi->open_files, list) { | |
1200 | state = ctx->state; | |
1201 | if (state == NULL) | |
1202 | continue; | |
1203 | if (!test_bit(NFS_DELEGATED_STATE, &state->flags)) | |
1204 | continue; | |
f597c537 | 1205 | if (!nfs4_stateid_match(&state->stateid, stateid)) |
a1d0b5ee TM |
1206 | continue; |
1207 | nfs4_state_mark_reclaim_nograce(clp, state); | |
1208 | found = true; | |
1209 | } | |
1210 | spin_unlock(&inode->i_lock); | |
1211 | if (found) | |
1212 | nfs4_schedule_state_manager(clp); | |
1213 | } | |
1214 | ||
1215 | ||
02860014 | 1216 | static int nfs4_reclaim_locks(struct nfs4_state *state, const struct nfs4_state_recovery_ops *ops) |
1da177e4 LT |
1217 | { |
1218 | struct inode *inode = state->inode; | |
19e03c57 | 1219 | struct nfs_inode *nfsi = NFS_I(inode); |
1da177e4 LT |
1220 | struct file_lock *fl; |
1221 | int status = 0; | |
1222 | ||
3f09df70 TM |
1223 | if (inode->i_flock == NULL) |
1224 | return 0; | |
1225 | ||
1226 | /* Guard against delegation returns and new lock/unlock calls */ | |
19e03c57 | 1227 | down_write(&nfsi->rwsem); |
3f09df70 | 1228 | /* Protect inode->i_flock using the BKL */ |
b89f4321 | 1229 | lock_flocks(); |
90dc7d27 | 1230 | for (fl = inode->i_flock; fl != NULL; fl = fl->fl_next) { |
43b2a33a | 1231 | if (!(fl->fl_flags & (FL_POSIX|FL_FLOCK))) |
1da177e4 | 1232 | continue; |
cd3758e3 | 1233 | if (nfs_file_open_context(fl->fl_file)->state != state) |
1da177e4 | 1234 | continue; |
b89f4321 | 1235 | unlock_flocks(); |
1da177e4 | 1236 | status = ops->recover_lock(state, fl); |
1da177e4 | 1237 | switch (status) { |
965b5d67 TM |
1238 | case 0: |
1239 | break; | |
1240 | case -ESTALE: | |
1241 | case -NFS4ERR_ADMIN_REVOKED: | |
1242 | case -NFS4ERR_STALE_STATEID: | |
1243 | case -NFS4ERR_BAD_STATEID: | |
1244 | case -NFS4ERR_EXPIRED: | |
1245 | case -NFS4ERR_NO_GRACE: | |
1246 | case -NFS4ERR_STALE_CLIENTID: | |
9c4c761a TM |
1247 | case -NFS4ERR_BADSESSION: |
1248 | case -NFS4ERR_BADSLOT: | |
1249 | case -NFS4ERR_BAD_HIGH_SLOT: | |
1250 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
965b5d67 | 1251 | goto out; |
1da177e4 | 1252 | default: |
a030889a WAA |
1253 | printk(KERN_ERR "NFS: %s: unhandled error %d. " |
1254 | "Zeroing state\n", __func__, status); | |
965b5d67 TM |
1255 | case -ENOMEM: |
1256 | case -NFS4ERR_DENIED: | |
1da177e4 LT |
1257 | case -NFS4ERR_RECLAIM_BAD: |
1258 | case -NFS4ERR_RECLAIM_CONFLICT: | |
43b2a33a | 1259 | /* kill_proc(fl->fl_pid, SIGLOST, 1); */ |
965b5d67 | 1260 | status = 0; |
1da177e4 | 1261 | } |
b89f4321 | 1262 | lock_flocks(); |
1da177e4 | 1263 | } |
b89f4321 | 1264 | unlock_flocks(); |
965b5d67 | 1265 | out: |
19e03c57 | 1266 | up_write(&nfsi->rwsem); |
1da177e4 LT |
1267 | return status; |
1268 | } | |
1269 | ||
02860014 | 1270 | static int nfs4_reclaim_open_state(struct nfs4_state_owner *sp, const struct nfs4_state_recovery_ops *ops) |
1da177e4 LT |
1271 | { |
1272 | struct nfs4_state *state; | |
1273 | struct nfs4_lock_state *lock; | |
1274 | int status = 0; | |
1275 | ||
1276 | /* Note: we rely on the sp->so_states list being ordered | |
1277 | * so that we always reclaim open(O_RDWR) and/or open(O_WRITE) | |
1278 | * states first. | |
1279 | * This is needed to ensure that the server won't give us any | |
1280 | * read delegations that we have to return if, say, we are | |
1281 | * recovering after a network partition or a reboot from a | |
1282 | * server that doesn't support a grace period. | |
1283 | */ | |
fe1d8195 TM |
1284 | restart: |
1285 | spin_lock(&sp->so_lock); | |
1da177e4 | 1286 | list_for_each_entry(state, &sp->so_states, open_states) { |
b79a4a1b TM |
1287 | if (!test_and_clear_bit(ops->state_flag_bit, &state->flags)) |
1288 | continue; | |
1da177e4 LT |
1289 | if (state->state == 0) |
1290 | continue; | |
fe1d8195 TM |
1291 | atomic_inc(&state->count); |
1292 | spin_unlock(&sp->so_lock); | |
1da177e4 | 1293 | status = ops->recover_open(sp, state); |
1da177e4 | 1294 | if (status >= 0) { |
02860014 TM |
1295 | status = nfs4_reclaim_locks(state, ops); |
1296 | if (status >= 0) { | |
4b44b40e | 1297 | spin_lock(&state->state_lock); |
02860014 | 1298 | list_for_each_entry(lock, &state->lock_states, ls_locks) { |
795a88c9 | 1299 | if (!test_bit(NFS_LOCK_INITIALIZED, &lock->ls_flags)) |
96dcadc2 WD |
1300 | pr_warn_ratelimited("NFS: " |
1301 | "%s: Lock reclaim " | |
a030889a | 1302 | "failed!\n", __func__); |
02860014 | 1303 | } |
4b44b40e | 1304 | spin_unlock(&state->state_lock); |
fe1d8195 TM |
1305 | nfs4_put_open_state(state); |
1306 | goto restart; | |
1da177e4 | 1307 | } |
1da177e4 LT |
1308 | } |
1309 | switch (status) { | |
1310 | default: | |
a030889a WAA |
1311 | printk(KERN_ERR "NFS: %s: unhandled error %d. " |
1312 | "Zeroing state\n", __func__, status); | |
1da177e4 | 1313 | case -ENOENT: |
965b5d67 | 1314 | case -ENOMEM: |
b79a4a1b | 1315 | case -ESTALE: |
1da177e4 LT |
1316 | /* |
1317 | * Open state on this file cannot be recovered | |
1318 | * All we can do is revert to using the zero stateid. | |
1319 | */ | |
2d2f24ad TM |
1320 | memset(&state->stateid, 0, |
1321 | sizeof(state->stateid)); | |
1da177e4 LT |
1322 | /* Mark the file as being 'closed' */ |
1323 | state->state = 0; | |
1324 | break; | |
168667c4 TM |
1325 | case -EKEYEXPIRED: |
1326 | /* | |
1327 | * User RPCSEC_GSS context has expired. | |
1328 | * We cannot recover this stateid now, so | |
1329 | * skip it and allow recovery thread to | |
1330 | * proceed. | |
1331 | */ | |
1332 | break; | |
965b5d67 TM |
1333 | case -NFS4ERR_ADMIN_REVOKED: |
1334 | case -NFS4ERR_STALE_STATEID: | |
1335 | case -NFS4ERR_BAD_STATEID: | |
b79a4a1b TM |
1336 | case -NFS4ERR_RECLAIM_BAD: |
1337 | case -NFS4ERR_RECLAIM_CONFLICT: | |
1f0e890d | 1338 | nfs4_state_mark_reclaim_nograce(sp->so_server->nfs_client, state); |
b79a4a1b | 1339 | break; |
1da177e4 LT |
1340 | case -NFS4ERR_EXPIRED: |
1341 | case -NFS4ERR_NO_GRACE: | |
1f0e890d | 1342 | nfs4_state_mark_reclaim_nograce(sp->so_server->nfs_client, state); |
1da177e4 | 1343 | case -NFS4ERR_STALE_CLIENTID: |
9c4c761a TM |
1344 | case -NFS4ERR_BADSESSION: |
1345 | case -NFS4ERR_BADSLOT: | |
1346 | case -NFS4ERR_BAD_HIGH_SLOT: | |
1347 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
1da177e4 LT |
1348 | goto out_err; |
1349 | } | |
fe1d8195 TM |
1350 | nfs4_put_open_state(state); |
1351 | goto restart; | |
1da177e4 | 1352 | } |
fe1d8195 | 1353 | spin_unlock(&sp->so_lock); |
1da177e4 LT |
1354 | return 0; |
1355 | out_err: | |
fe1d8195 | 1356 | nfs4_put_open_state(state); |
1da177e4 LT |
1357 | return status; |
1358 | } | |
1359 | ||
b79a4a1b TM |
1360 | static void nfs4_clear_open_state(struct nfs4_state *state) |
1361 | { | |
1362 | struct nfs4_lock_state *lock; | |
1363 | ||
1364 | clear_bit(NFS_DELEGATED_STATE, &state->flags); | |
1365 | clear_bit(NFS_O_RDONLY_STATE, &state->flags); | |
1366 | clear_bit(NFS_O_WRONLY_STATE, &state->flags); | |
1367 | clear_bit(NFS_O_RDWR_STATE, &state->flags); | |
4b44b40e | 1368 | spin_lock(&state->state_lock); |
b79a4a1b | 1369 | list_for_each_entry(lock, &state->lock_states, ls_locks) { |
b79a4a1b | 1370 | lock->ls_seqid.flags = 0; |
795a88c9 | 1371 | clear_bit(NFS_LOCK_INITIALIZED, &lock->ls_flags); |
b79a4a1b | 1372 | } |
4b44b40e | 1373 | spin_unlock(&state->state_lock); |
b79a4a1b TM |
1374 | } |
1375 | ||
24d292b8 CL |
1376 | static void nfs4_reset_seqids(struct nfs_server *server, |
1377 | int (*mark_reclaim)(struct nfs_client *clp, struct nfs4_state *state)) | |
cee54fc9 | 1378 | { |
24d292b8 | 1379 | struct nfs_client *clp = server->nfs_client; |
cee54fc9 | 1380 | struct nfs4_state_owner *sp; |
9f958ab8 | 1381 | struct rb_node *pos; |
cee54fc9 | 1382 | struct nfs4_state *state; |
cee54fc9 | 1383 | |
24d292b8 CL |
1384 | spin_lock(&clp->cl_lock); |
1385 | for (pos = rb_first(&server->state_owners); | |
1386 | pos != NULL; | |
1387 | pos = rb_next(pos)) { | |
1388 | sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); | |
cee54fc9 | 1389 | sp->so_seqid.flags = 0; |
ec073428 | 1390 | spin_lock(&sp->so_lock); |
cee54fc9 | 1391 | list_for_each_entry(state, &sp->so_states, open_states) { |
b79a4a1b TM |
1392 | if (mark_reclaim(clp, state)) |
1393 | nfs4_clear_open_state(state); | |
cee54fc9 | 1394 | } |
ec073428 | 1395 | spin_unlock(&sp->so_lock); |
cee54fc9 | 1396 | } |
24d292b8 CL |
1397 | spin_unlock(&clp->cl_lock); |
1398 | } | |
1399 | ||
1400 | static void nfs4_state_mark_reclaim_helper(struct nfs_client *clp, | |
1401 | int (*mark_reclaim)(struct nfs_client *clp, struct nfs4_state *state)) | |
1402 | { | |
1403 | struct nfs_server *server; | |
1404 | ||
1405 | rcu_read_lock(); | |
1406 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) | |
1407 | nfs4_reset_seqids(server, mark_reclaim); | |
1408 | rcu_read_unlock(); | |
cee54fc9 TM |
1409 | } |
1410 | ||
b79a4a1b TM |
1411 | static void nfs4_state_start_reclaim_reboot(struct nfs_client *clp) |
1412 | { | |
1413 | /* Mark all delegations for reclaim */ | |
1414 | nfs_delegation_mark_reclaim(clp); | |
1415 | nfs4_state_mark_reclaim_helper(clp, nfs4_state_mark_reclaim_reboot); | |
1416 | } | |
1417 | ||
fce5c838 RL |
1418 | static void nfs4_reclaim_complete(struct nfs_client *clp, |
1419 | const struct nfs4_state_recovery_ops *ops) | |
1420 | { | |
1421 | /* Notify the server we're done reclaiming our state */ | |
1422 | if (ops->reclaim_complete) | |
1423 | (void)ops->reclaim_complete(clp); | |
1424 | } | |
1425 | ||
24d292b8 | 1426 | static void nfs4_clear_reclaim_server(struct nfs_server *server) |
b79a4a1b | 1427 | { |
24d292b8 | 1428 | struct nfs_client *clp = server->nfs_client; |
b79a4a1b TM |
1429 | struct nfs4_state_owner *sp; |
1430 | struct rb_node *pos; | |
1431 | struct nfs4_state *state; | |
1432 | ||
24d292b8 CL |
1433 | spin_lock(&clp->cl_lock); |
1434 | for (pos = rb_first(&server->state_owners); | |
1435 | pos != NULL; | |
1436 | pos = rb_next(pos)) { | |
1437 | sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); | |
b79a4a1b TM |
1438 | spin_lock(&sp->so_lock); |
1439 | list_for_each_entry(state, &sp->so_states, open_states) { | |
24d292b8 CL |
1440 | if (!test_and_clear_bit(NFS_STATE_RECLAIM_REBOOT, |
1441 | &state->flags)) | |
b79a4a1b TM |
1442 | continue; |
1443 | nfs4_state_mark_reclaim_nograce(clp, state); | |
1444 | } | |
1445 | spin_unlock(&sp->so_lock); | |
1446 | } | |
24d292b8 CL |
1447 | spin_unlock(&clp->cl_lock); |
1448 | } | |
1449 | ||
1450 | static int nfs4_state_clear_reclaim_reboot(struct nfs_client *clp) | |
1451 | { | |
1452 | struct nfs_server *server; | |
1453 | ||
1454 | if (!test_and_clear_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) | |
1455 | return 0; | |
1456 | ||
1457 | rcu_read_lock(); | |
1458 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) | |
1459 | nfs4_clear_reclaim_server(server); | |
1460 | rcu_read_unlock(); | |
b79a4a1b TM |
1461 | |
1462 | nfs_delegation_reap_unclaimed(clp); | |
6eaa6149 TM |
1463 | return 1; |
1464 | } | |
1465 | ||
1466 | static void nfs4_state_end_reclaim_reboot(struct nfs_client *clp) | |
1467 | { | |
1468 | if (!nfs4_state_clear_reclaim_reboot(clp)) | |
1469 | return; | |
1470 | nfs4_reclaim_complete(clp, clp->cl_mvops->reboot_recovery_ops); | |
b79a4a1b TM |
1471 | } |
1472 | ||
1473 | static void nfs_delegation_clear_all(struct nfs_client *clp) | |
1474 | { | |
1475 | nfs_delegation_mark_reclaim(clp); | |
1476 | nfs_delegation_reap_unclaimed(clp); | |
1477 | } | |
1478 | ||
1479 | static void nfs4_state_start_reclaim_nograce(struct nfs_client *clp) | |
1480 | { | |
1481 | nfs_delegation_clear_all(clp); | |
1482 | nfs4_state_mark_reclaim_helper(clp, nfs4_state_mark_reclaim_nograce); | |
1483 | } | |
1484 | ||
168667c4 TM |
1485 | static void nfs4_warn_keyexpired(const char *s) |
1486 | { | |
1487 | printk_ratelimited(KERN_WARNING "Error: state manager" | |
1488 | " encountered RPCSEC_GSS session" | |
1489 | " expired against NFSv4 server %s.\n", | |
1490 | s); | |
1491 | } | |
1492 | ||
4f7cdf18 | 1493 | static int nfs4_recovery_handle_error(struct nfs_client *clp, int error) |
e598d843 TM |
1494 | { |
1495 | switch (error) { | |
4f38e4aa TM |
1496 | case 0: |
1497 | break; | |
e598d843 | 1498 | case -NFS4ERR_CB_PATH_DOWN: |
ad1e3968 | 1499 | nfs40_handle_cb_pathdown(clp); |
4f38e4aa | 1500 | break; |
c8b7ae3d TM |
1501 | case -NFS4ERR_NO_GRACE: |
1502 | nfs4_state_end_reclaim_reboot(clp); | |
4f38e4aa | 1503 | break; |
e598d843 TM |
1504 | case -NFS4ERR_STALE_CLIENTID: |
1505 | case -NFS4ERR_LEASE_MOVED: | |
1506 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
6eaa6149 | 1507 | nfs4_state_clear_reclaim_reboot(clp); |
e598d843 TM |
1508 | nfs4_state_start_reclaim_reboot(clp); |
1509 | break; | |
1510 | case -NFS4ERR_EXPIRED: | |
1511 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1512 | nfs4_state_start_reclaim_nograce(clp); | |
8ba9bf8e | 1513 | break; |
c3fad1b1 AA |
1514 | case -NFS4ERR_BADSESSION: |
1515 | case -NFS4ERR_BADSLOT: | |
1516 | case -NFS4ERR_BAD_HIGH_SLOT: | |
1517 | case -NFS4ERR_DEADSESSION: | |
c3fad1b1 AA |
1518 | case -NFS4ERR_SEQ_FALSE_RETRY: |
1519 | case -NFS4ERR_SEQ_MISORDERED: | |
6df08189 | 1520 | set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); |
0b9e2d41 | 1521 | /* Zero session reset errors */ |
4f38e4aa | 1522 | break; |
7c5d7256 TM |
1523 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: |
1524 | set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); | |
1525 | break; | |
168667c4 TM |
1526 | case -EKEYEXPIRED: |
1527 | /* Nothing we can do */ | |
1528 | nfs4_warn_keyexpired(clp->cl_hostname); | |
4f38e4aa TM |
1529 | break; |
1530 | default: | |
cc0a9843 TM |
1531 | dprintk("%s: failed to handle error %d for server %s\n", |
1532 | __func__, error, clp->cl_hostname); | |
4f38e4aa | 1533 | return error; |
e598d843 | 1534 | } |
cc0a9843 TM |
1535 | dprintk("%s: handled error %d for server %s\n", __func__, error, |
1536 | clp->cl_hostname); | |
4f38e4aa | 1537 | return 0; |
e598d843 TM |
1538 | } |
1539 | ||
02860014 | 1540 | static int nfs4_do_reclaim(struct nfs_client *clp, const struct nfs4_state_recovery_ops *ops) |
1da177e4 | 1541 | { |
24d292b8 CL |
1542 | struct nfs4_state_owner *sp; |
1543 | struct nfs_server *server; | |
9f958ab8 | 1544 | struct rb_node *pos; |
1da177e4 LT |
1545 | int status = 0; |
1546 | ||
7eff03ae | 1547 | restart: |
24d292b8 CL |
1548 | rcu_read_lock(); |
1549 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { | |
0aaaf5c4 | 1550 | nfs4_purge_state_owners(server); |
24d292b8 CL |
1551 | spin_lock(&clp->cl_lock); |
1552 | for (pos = rb_first(&server->state_owners); | |
1553 | pos != NULL; | |
1554 | pos = rb_next(pos)) { | |
1555 | sp = rb_entry(pos, | |
1556 | struct nfs4_state_owner, so_server_node); | |
1557 | if (!test_and_clear_bit(ops->owner_flag_bit, | |
1558 | &sp->so_flags)) | |
1559 | continue; | |
1560 | atomic_inc(&sp->so_count); | |
1561 | spin_unlock(&clp->cl_lock); | |
1562 | rcu_read_unlock(); | |
1563 | ||
1564 | status = nfs4_reclaim_open_state(sp, ops); | |
1565 | if (status < 0) { | |
1566 | set_bit(ops->owner_flag_bit, &sp->so_flags); | |
1567 | nfs4_put_state_owner(sp); | |
1568 | return nfs4_recovery_handle_error(clp, status); | |
1569 | } | |
1570 | ||
7eff03ae | 1571 | nfs4_put_state_owner(sp); |
24d292b8 | 1572 | goto restart; |
7eff03ae | 1573 | } |
24d292b8 | 1574 | spin_unlock(&clp->cl_lock); |
02860014 | 1575 | } |
24d292b8 | 1576 | rcu_read_unlock(); |
02860014 TM |
1577 | return status; |
1578 | } | |
1579 | ||
1580 | static int nfs4_check_lease(struct nfs_client *clp) | |
1581 | { | |
1582 | struct rpc_cred *cred; | |
c48f4f35 TM |
1583 | const struct nfs4_state_maintenance_ops *ops = |
1584 | clp->cl_mvops->state_renewal_ops; | |
4f38e4aa | 1585 | int status; |
1da177e4 | 1586 | |
0f605b56 TM |
1587 | /* Is the client already known to have an expired lease? */ |
1588 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) | |
1589 | return 0; | |
a7b72103 AA |
1590 | spin_lock(&clp->cl_lock); |
1591 | cred = ops->get_state_renewal_cred_locked(clp); | |
1592 | spin_unlock(&clp->cl_lock); | |
0f605b56 TM |
1593 | if (cred == NULL) { |
1594 | cred = nfs4_get_setclientid_cred(clp); | |
4f38e4aa | 1595 | status = -ENOKEY; |
0f605b56 TM |
1596 | if (cred == NULL) |
1597 | goto out; | |
286d7d6a | 1598 | } |
8e69514f | 1599 | status = ops->renew_lease(clp, cred); |
0f605b56 TM |
1600 | put_rpccred(cred); |
1601 | out: | |
4f7cdf18 | 1602 | return nfs4_recovery_handle_error(clp, status); |
02860014 TM |
1603 | } |
1604 | ||
2a6ee6aa TM |
1605 | /* Set NFS4CLNT_LEASE_EXPIRED for all v4.0 errors and for recoverable errors |
1606 | * on EXCHANGE_ID for v4.1 | |
1607 | */ | |
1608 | static int nfs4_handle_reclaim_lease_error(struct nfs_client *clp, int status) | |
1609 | { | |
1610 | switch (status) { | |
89a21736 TM |
1611 | case -NFS4ERR_SEQ_MISORDERED: |
1612 | if (test_and_set_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) | |
1613 | return -ESERVERFAULT; | |
1614 | /* Lease confirmation error: retry after purging the lease */ | |
1615 | ssleep(1); | |
2a6ee6aa TM |
1616 | case -NFS4ERR_STALE_CLIENTID: |
1617 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); | |
1618 | break; | |
de734831 CL |
1619 | case -NFS4ERR_CLID_INUSE: |
1620 | pr_err("NFS: Server %s reports our clientid is in use\n", | |
1621 | clp->cl_hostname); | |
1622 | nfs_mark_client_ready(clp, -EPERM); | |
1623 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); | |
1624 | return -EPERM; | |
2a6ee6aa TM |
1625 | case -EACCES: |
1626 | if (clp->cl_machine_cred == NULL) | |
1627 | return -EACCES; | |
1628 | /* Handle case where the user hasn't set up machine creds */ | |
1629 | nfs4_clear_machine_cred(clp); | |
1630 | case -NFS4ERR_DELAY: | |
1631 | case -ETIMEDOUT: | |
1632 | case -EAGAIN: | |
1633 | ssleep(1); | |
1634 | break; | |
1635 | ||
1636 | case -NFS4ERR_MINOR_VERS_MISMATCH: | |
1637 | if (clp->cl_cons_state == NFS_CS_SESSION_INITING) | |
1638 | nfs_mark_client_ready(clp, -EPROTONOSUPPORT); | |
cc0a9843 TM |
1639 | dprintk("%s: exit with error %d for server %s\n", |
1640 | __func__, -EPROTONOSUPPORT, clp->cl_hostname); | |
2a6ee6aa TM |
1641 | return -EPROTONOSUPPORT; |
1642 | case -EKEYEXPIRED: | |
1643 | nfs4_warn_keyexpired(clp->cl_hostname); | |
1644 | case -NFS4ERR_NOT_SAME: /* FixMe: implement recovery | |
1645 | * in nfs4_exchange_id */ | |
1646 | default: | |
cc0a9843 TM |
1647 | dprintk("%s: exit with error %d for server %s\n", __func__, |
1648 | status, clp->cl_hostname); | |
2a6ee6aa TM |
1649 | return status; |
1650 | } | |
1651 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
cc0a9843 TM |
1652 | dprintk("%s: handled error %d for server %s\n", __func__, status, |
1653 | clp->cl_hostname); | |
2a6ee6aa TM |
1654 | return 0; |
1655 | } | |
1656 | ||
b42353ff | 1657 | static int nfs4_establish_lease(struct nfs_client *clp) |
02860014 TM |
1658 | { |
1659 | struct rpc_cred *cred; | |
c48f4f35 TM |
1660 | const struct nfs4_state_recovery_ops *ops = |
1661 | clp->cl_mvops->reboot_recovery_ops; | |
2a6ee6aa | 1662 | int status; |
02860014 | 1663 | |
90a16617 | 1664 | cred = ops->get_clid_cred(clp); |
2a6ee6aa TM |
1665 | if (cred == NULL) |
1666 | return -ENOENT; | |
1667 | status = ops->establish_clid(clp, cred); | |
1668 | put_rpccred(cred); | |
1669 | if (status != 0) | |
b42353ff TM |
1670 | return status; |
1671 | pnfs_destroy_all_layouts(clp); | |
1672 | return 0; | |
1673 | } | |
1674 | ||
6bbb4ae8 CL |
1675 | /* |
1676 | * Returns zero or a negative errno. NFS4ERR values are converted | |
1677 | * to local errno values. | |
1678 | */ | |
b42353ff TM |
1679 | static int nfs4_reclaim_lease(struct nfs_client *clp) |
1680 | { | |
1681 | int status; | |
1682 | ||
1683 | status = nfs4_establish_lease(clp); | |
1684 | if (status < 0) | |
1685 | return nfs4_handle_reclaim_lease_error(clp, status); | |
1686 | if (test_and_clear_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state)) | |
1687 | nfs4_state_start_reclaim_nograce(clp); | |
1688 | if (!test_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) | |
1689 | set_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state); | |
1690 | clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); | |
1691 | clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1692 | return 0; | |
1693 | } | |
1694 | ||
1695 | static int nfs4_purge_lease(struct nfs_client *clp) | |
1696 | { | |
1697 | int status; | |
1698 | ||
1699 | status = nfs4_establish_lease(clp); | |
1700 | if (status < 0) | |
2a6ee6aa | 1701 | return nfs4_handle_reclaim_lease_error(clp, status); |
b42353ff TM |
1702 | clear_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state); |
1703 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1704 | nfs4_state_start_reclaim_nograce(clp); | |
2a6ee6aa | 1705 | return 0; |
02860014 TM |
1706 | } |
1707 | ||
76db6d95 | 1708 | #ifdef CONFIG_NFS_V4_1 |
9f594791 | 1709 | void nfs4_schedule_session_recovery(struct nfs4_session *session, int err) |
0400a6b0 | 1710 | { |
444f72fe TM |
1711 | struct nfs_client *clp = session->clp; |
1712 | ||
9f594791 TM |
1713 | switch (err) { |
1714 | default: | |
1715 | set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); | |
1716 | break; | |
1717 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
1718 | set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); | |
1719 | } | |
444f72fe | 1720 | nfs4_schedule_lease_recovery(clp); |
0400a6b0 | 1721 | } |
cbdabc7f | 1722 | EXPORT_SYMBOL_GPL(nfs4_schedule_session_recovery); |
0400a6b0 | 1723 | |
b9efa1b2 AA |
1724 | void nfs41_handle_recall_slot(struct nfs_client *clp) |
1725 | { | |
1726 | set_bit(NFS4CLNT_RECALL_SLOT, &clp->cl_state); | |
cc0a9843 TM |
1727 | dprintk("%s: scheduling slot recall for server %s\n", __func__, |
1728 | clp->cl_hostname); | |
0400a6b0 | 1729 | nfs4_schedule_state_manager(clp); |
b9efa1b2 AA |
1730 | } |
1731 | ||
0f79fd6f TM |
1732 | static void nfs4_reset_all_state(struct nfs_client *clp) |
1733 | { | |
1734 | if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) == 0) { | |
2c820d9a | 1735 | set_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state); |
be0bfed0 | 1736 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
0f79fd6f | 1737 | nfs4_state_start_reclaim_nograce(clp); |
cc0a9843 TM |
1738 | dprintk("%s: scheduling reset of all state for server %s!\n", |
1739 | __func__, clp->cl_hostname); | |
0400a6b0 | 1740 | nfs4_schedule_state_manager(clp); |
0f79fd6f TM |
1741 | } |
1742 | } | |
1743 | ||
1744 | static void nfs41_handle_server_reboot(struct nfs_client *clp) | |
1745 | { | |
1746 | if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) == 0) { | |
1747 | nfs4_state_start_reclaim_reboot(clp); | |
cc0a9843 TM |
1748 | dprintk("%s: server %s rebooted!\n", __func__, |
1749 | clp->cl_hostname); | |
0400a6b0 | 1750 | nfs4_schedule_state_manager(clp); |
0f79fd6f TM |
1751 | } |
1752 | } | |
1753 | ||
1754 | static void nfs41_handle_state_revoked(struct nfs_client *clp) | |
1755 | { | |
0f79fd6f | 1756 | nfs4_reset_all_state(clp); |
cc0a9843 | 1757 | dprintk("%s: state revoked on server %s\n", __func__, clp->cl_hostname); |
0f79fd6f TM |
1758 | } |
1759 | ||
1760 | static void nfs41_handle_recallable_state_revoked(struct nfs_client *clp) | |
1761 | { | |
1762 | /* This will need to handle layouts too */ | |
1763 | nfs_expire_all_delegations(clp); | |
cc0a9843 TM |
1764 | dprintk("%s: Recallable state revoked on server %s!\n", __func__, |
1765 | clp->cl_hostname); | |
0f79fd6f TM |
1766 | } |
1767 | ||
a9e64442 | 1768 | static void nfs41_handle_backchannel_fault(struct nfs_client *clp) |
0f79fd6f TM |
1769 | { |
1770 | nfs_expire_all_delegations(clp); | |
1771 | if (test_and_set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state) == 0) | |
0400a6b0 | 1772 | nfs4_schedule_state_manager(clp); |
cc0a9843 TM |
1773 | dprintk("%s: server %s declared a backchannel fault\n", __func__, |
1774 | clp->cl_hostname); | |
0f79fd6f TM |
1775 | } |
1776 | ||
a9e64442 WAA |
1777 | static void nfs41_handle_cb_path_down(struct nfs_client *clp) |
1778 | { | |
1779 | if (test_and_set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, | |
1780 | &clp->cl_state) == 0) | |
1781 | nfs4_schedule_state_manager(clp); | |
1782 | } | |
1783 | ||
0629e370 AB |
1784 | void nfs41_handle_sequence_flag_errors(struct nfs_client *clp, u32 flags) |
1785 | { | |
1786 | if (!flags) | |
1787 | return; | |
2c820d9a CL |
1788 | |
1789 | dprintk("%s: \"%s\" (client ID %llx) flags=0x%08x\n", | |
1790 | __func__, clp->cl_hostname, clp->cl_clientid, flags); | |
1791 | ||
111d489f | 1792 | if (flags & SEQ4_STATUS_RESTART_RECLAIM_NEEDED) |
0f79fd6f | 1793 | nfs41_handle_server_reboot(clp); |
111d489f | 1794 | if (flags & (SEQ4_STATUS_EXPIRED_ALL_STATE_REVOKED | |
0629e370 AB |
1795 | SEQ4_STATUS_EXPIRED_SOME_STATE_REVOKED | |
1796 | SEQ4_STATUS_ADMIN_STATE_REVOKED | | |
0f79fd6f TM |
1797 | SEQ4_STATUS_LEASE_MOVED)) |
1798 | nfs41_handle_state_revoked(clp); | |
111d489f | 1799 | if (flags & SEQ4_STATUS_RECALLABLE_STATE_REVOKED) |
0f79fd6f | 1800 | nfs41_handle_recallable_state_revoked(clp); |
a9e64442 WAA |
1801 | if (flags & SEQ4_STATUS_BACKCHANNEL_FAULT) |
1802 | nfs41_handle_backchannel_fault(clp); | |
1803 | else if (flags & (SEQ4_STATUS_CB_PATH_DOWN | | |
1804 | SEQ4_STATUS_CB_PATH_DOWN_SESSION)) | |
0f79fd6f | 1805 | nfs41_handle_cb_path_down(clp); |
0629e370 AB |
1806 | } |
1807 | ||
c3fad1b1 AA |
1808 | static int nfs4_reset_session(struct nfs_client *clp) |
1809 | { | |
848f5bda | 1810 | struct rpc_cred *cred; |
c3fad1b1 AA |
1811 | int status; |
1812 | ||
1a47e7a6 TM |
1813 | if (!nfs4_has_session(clp)) |
1814 | return 0; | |
38045412 | 1815 | nfs4_begin_drain_session(clp); |
848f5bda TM |
1816 | cred = nfs4_get_exchange_id_cred(clp); |
1817 | status = nfs4_proc_destroy_session(clp->cl_session, cred); | |
c3fad1b1 AA |
1818 | if (status && status != -NFS4ERR_BADSESSION && |
1819 | status != -NFS4ERR_DEADSESSION) { | |
f455848a | 1820 | status = nfs4_recovery_handle_error(clp, status); |
c3fad1b1 AA |
1821 | goto out; |
1822 | } | |
1823 | ||
1824 | memset(clp->cl_session->sess_id.data, 0, NFS4_MAX_SESSIONID_LEN); | |
848f5bda | 1825 | status = nfs4_proc_create_session(clp, cred); |
41f54a55 | 1826 | if (status) { |
cc0a9843 TM |
1827 | dprintk("%s: session reset failed with status %d for server %s!\n", |
1828 | __func__, status, clp->cl_hostname); | |
f2c1b510 | 1829 | status = nfs4_handle_reclaim_lease_error(clp, status); |
41f54a55 AA |
1830 | goto out; |
1831 | } | |
bda197f5 | 1832 | nfs41_finish_session_reset(clp); |
cc0a9843 TM |
1833 | dprintk("%s: session reset was successful for server %s!\n", |
1834 | __func__, clp->cl_hostname); | |
41f54a55 | 1835 | out: |
848f5bda TM |
1836 | if (cred) |
1837 | put_rpccred(cred); | |
c3fad1b1 AA |
1838 | return status; |
1839 | } | |
76db6d95 | 1840 | |
b9efa1b2 AA |
1841 | static int nfs4_recall_slot(struct nfs_client *clp) |
1842 | { | |
60f00153 | 1843 | struct nfs4_slot_table *fc_tbl; |
b9efa1b2 AA |
1844 | struct nfs4_slot *new, *old; |
1845 | int i; | |
1846 | ||
60f00153 TM |
1847 | if (!nfs4_has_session(clp)) |
1848 | return 0; | |
b9efa1b2 | 1849 | nfs4_begin_drain_session(clp); |
60f00153 | 1850 | fc_tbl = &clp->cl_session->fc_slot_table; |
b9efa1b2 | 1851 | new = kmalloc(fc_tbl->target_max_slots * sizeof(struct nfs4_slot), |
8535b2be | 1852 | GFP_NOFS); |
b9efa1b2 AA |
1853 | if (!new) |
1854 | return -ENOMEM; | |
1855 | ||
1856 | spin_lock(&fc_tbl->slot_tbl_lock); | |
1857 | for (i = 0; i < fc_tbl->target_max_slots; i++) | |
1858 | new[i].seq_nr = fc_tbl->slots[i].seq_nr; | |
1859 | old = fc_tbl->slots; | |
1860 | fc_tbl->slots = new; | |
1861 | fc_tbl->max_slots = fc_tbl->target_max_slots; | |
1862 | fc_tbl->target_max_slots = 0; | |
60f00153 | 1863 | clp->cl_session->fc_attrs.max_reqs = fc_tbl->max_slots; |
b9efa1b2 AA |
1864 | spin_unlock(&fc_tbl->slot_tbl_lock); |
1865 | ||
1866 | kfree(old); | |
b9efa1b2 AA |
1867 | return 0; |
1868 | } | |
1869 | ||
a9e64442 WAA |
1870 | static int nfs4_bind_conn_to_session(struct nfs_client *clp) |
1871 | { | |
2cf047c9 TM |
1872 | struct rpc_cred *cred; |
1873 | int ret; | |
1874 | ||
1a47e7a6 TM |
1875 | if (!nfs4_has_session(clp)) |
1876 | return 0; | |
43ac544c | 1877 | nfs4_begin_drain_session(clp); |
2cf047c9 TM |
1878 | cred = nfs4_get_exchange_id_cred(clp); |
1879 | ret = nfs4_proc_bind_conn_to_session(clp, cred); | |
1880 | if (cred) | |
1881 | put_rpccred(cred); | |
43ac544c | 1882 | clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); |
bf674c82 TM |
1883 | switch (ret) { |
1884 | case 0: | |
cc0a9843 TM |
1885 | dprintk("%s: bind_conn_to_session was successful for server %s!\n", |
1886 | __func__, clp->cl_hostname); | |
bf674c82 TM |
1887 | break; |
1888 | case -NFS4ERR_DELAY: | |
1889 | ssleep(1); | |
1890 | set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); | |
1891 | break; | |
1892 | default: | |
1893 | return nfs4_recovery_handle_error(clp, ret); | |
1894 | } | |
1895 | return 0; | |
a9e64442 | 1896 | } |
76db6d95 | 1897 | #else /* CONFIG_NFS_V4_1 */ |
c3fad1b1 | 1898 | static int nfs4_reset_session(struct nfs_client *clp) { return 0; } |
5601a00d | 1899 | static int nfs4_end_drain_session(struct nfs_client *clp) { return 0; } |
b9efa1b2 | 1900 | static int nfs4_recall_slot(struct nfs_client *clp) { return 0; } |
a9e64442 WAA |
1901 | |
1902 | static int nfs4_bind_conn_to_session(struct nfs_client *clp) | |
1903 | { | |
1904 | return 0; | |
1905 | } | |
76db6d95 AA |
1906 | #endif /* CONFIG_NFS_V4_1 */ |
1907 | ||
e005e804 | 1908 | static void nfs4_state_manager(struct nfs_client *clp) |
02860014 | 1909 | { |
02860014 | 1910 | int status = 0; |
8ed27d4f | 1911 | const char *section = "", *section_sep = ""; |
02860014 | 1912 | |
02860014 | 1913 | /* Ensure exclusive access to NFSv4 state */ |
47c2199b | 1914 | do { |
2c820d9a | 1915 | if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) { |
8ed27d4f | 1916 | section = "purge state"; |
b42353ff | 1917 | status = nfs4_purge_lease(clp); |
2a6ee6aa TM |
1918 | if (status < 0) |
1919 | goto out_error; | |
b42353ff | 1920 | continue; |
2c820d9a CL |
1921 | } |
1922 | ||
b42353ff | 1923 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) { |
8ed27d4f | 1924 | section = "lease expired"; |
b79a4a1b TM |
1925 | /* We're going to have to re-establish a clientid */ |
1926 | status = nfs4_reclaim_lease(clp); | |
2a6ee6aa | 1927 | if (status < 0) |
b79a4a1b | 1928 | goto out_error; |
b42353ff | 1929 | continue; |
e598d843 TM |
1930 | } |
1931 | ||
1932 | if (test_and_clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state)) { | |
8ed27d4f | 1933 | section = "check lease"; |
e598d843 | 1934 | status = nfs4_check_lease(clp); |
4f38e4aa TM |
1935 | if (status < 0) |
1936 | goto out_error; | |
b6d408ba | 1937 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
e598d843 | 1938 | continue; |
b79a4a1b | 1939 | } |
b6d408ba | 1940 | |
c3fad1b1 | 1941 | /* Initialize or reset the session */ |
1a47e7a6 | 1942 | if (test_and_clear_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state)) { |
8ed27d4f | 1943 | section = "reset session"; |
4d643d1d | 1944 | status = nfs4_reset_session(clp); |
b6d408ba TM |
1945 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
1946 | continue; | |
1947 | if (status < 0) | |
76db6d95 | 1948 | goto out_error; |
76db6d95 | 1949 | } |
b6d408ba | 1950 | |
a9e64442 WAA |
1951 | /* Send BIND_CONN_TO_SESSION */ |
1952 | if (test_and_clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION, | |
1a47e7a6 | 1953 | &clp->cl_state)) { |
8ed27d4f | 1954 | section = "bind conn to session"; |
a9e64442 WAA |
1955 | status = nfs4_bind_conn_to_session(clp); |
1956 | if (status < 0) | |
1957 | goto out_error; | |
bf674c82 | 1958 | continue; |
a9e64442 WAA |
1959 | } |
1960 | ||
1a2dd948 | 1961 | /* Recall session slots */ |
60f00153 | 1962 | if (test_and_clear_bit(NFS4CLNT_RECALL_SLOT, &clp->cl_state)) { |
1a2dd948 TM |
1963 | section = "recall slot"; |
1964 | status = nfs4_recall_slot(clp); | |
1965 | if (status < 0) | |
1966 | goto out_error; | |
1967 | continue; | |
1968 | } | |
1969 | ||
b79a4a1b | 1970 | /* First recover reboot state... */ |
e345e88a | 1971 | if (test_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) { |
8ed27d4f | 1972 | section = "reclaim reboot"; |
591d71cb | 1973 | status = nfs4_do_reclaim(clp, |
c48f4f35 | 1974 | clp->cl_mvops->reboot_recovery_ops); |
b6d408ba | 1975 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) || |
6df08189 | 1976 | test_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state)) |
c3fad1b1 | 1977 | continue; |
b79a4a1b | 1978 | nfs4_state_end_reclaim_reboot(clp); |
b6d408ba TM |
1979 | if (test_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) |
1980 | continue; | |
1981 | if (status < 0) | |
1982 | goto out_error; | |
02860014 TM |
1983 | } |
1984 | ||
b79a4a1b TM |
1985 | /* Now recover expired state... */ |
1986 | if (test_and_clear_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) { | |
8ed27d4f | 1987 | section = "reclaim nograce"; |
591d71cb | 1988 | status = nfs4_do_reclaim(clp, |
c48f4f35 | 1989 | clp->cl_mvops->nograce_recovery_ops); |
b6d408ba | 1990 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) || |
6df08189 | 1991 | test_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state) || |
b6d408ba TM |
1992 | test_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) |
1993 | continue; | |
1994 | if (status < 0) | |
b79a4a1b | 1995 | goto out_error; |
1da177e4 | 1996 | } |
707fb4b3 | 1997 | |
5601a00d | 1998 | nfs4_end_drain_session(clp); |
707fb4b3 TM |
1999 | if (test_and_clear_bit(NFS4CLNT_DELEGRETURN, &clp->cl_state)) { |
2000 | nfs_client_return_marked_delegations(clp); | |
2001 | continue; | |
2002 | } | |
e005e804 TM |
2003 | |
2004 | nfs4_clear_state_manager_bit(clp); | |
f3c76491 TM |
2005 | /* Did we race with an attempt to give us more work? */ |
2006 | if (clp->cl_state == 0) | |
2007 | break; | |
2008 | if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) != 0) | |
2009 | break; | |
47c2199b | 2010 | } while (atomic_read(&clp->cl_count) > 1); |
e005e804 | 2011 | return; |
1da177e4 | 2012 | out_error: |
8ed27d4f WAA |
2013 | if (strlen(section)) |
2014 | section_sep = ": "; | |
2015 | pr_warn_ratelimited("NFS: state manager%s%s failed on NFSv4 server %s" | |
2016 | " with error %d\n", section_sep, section, | |
2017 | clp->cl_hostname, -status); | |
5601a00d | 2018 | nfs4_end_drain_session(clp); |
e005e804 TM |
2019 | nfs4_clear_state_manager_bit(clp); |
2020 | } | |
2021 | ||
2022 | static int nfs4_run_state_manager(void *ptr) | |
2023 | { | |
2024 | struct nfs_client *clp = ptr; | |
2025 | ||
2026 | allow_signal(SIGKILL); | |
2027 | nfs4_state_manager(clp); | |
2028 | nfs_put_client(clp); | |
2029 | module_put_and_exit(0); | |
2030 | return 0; | |
1da177e4 LT |
2031 | } |
2032 | ||
2033 | /* | |
2034 | * Local variables: | |
2035 | * c-basic-offset: 8 | |
2036 | * End: | |
2037 | */ |