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" |
1da177e4 | 59 | |
e3c0fb7e CL |
60 | #define NFSDBG_FACILITY NFSDBG_STATE |
61 | ||
1da177e4 LT |
62 | #define OPENOWNER_POOL_SIZE 8 |
63 | ||
4ce79717 | 64 | const nfs4_stateid zero_stateid; |
1da177e4 LT |
65 | |
66 | static LIST_HEAD(nfs4_clientid_list); | |
67 | ||
591d71cb | 68 | int nfs4_init_clientid(struct nfs_client *clp, struct rpc_cred *cred) |
1da177e4 | 69 | { |
fd954ae1 TM |
70 | struct nfs4_setclientid_res clid = { |
71 | .clientid = clp->cl_clientid, | |
72 | .confirm = clp->cl_confirm, | |
73 | }; | |
f738f517 CL |
74 | unsigned short port; |
75 | int status; | |
76 | ||
fd954ae1 TM |
77 | if (test_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state)) |
78 | goto do_confirm; | |
f738f517 CL |
79 | port = nfs_callback_tcpport; |
80 | if (clp->cl_addr.ss_family == AF_INET6) | |
81 | port = nfs_callback_tcpport6; | |
82 | ||
bb8b27e5 TM |
83 | status = nfs4_proc_setclientid(clp, NFS4_CALLBACK, port, cred, &clid); |
84 | if (status != 0) | |
85 | goto out; | |
fd954ae1 TM |
86 | clp->cl_clientid = clid.clientid; |
87 | clp->cl_confirm = clid.confirm; | |
88 | set_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); | |
89 | do_confirm: | |
bb8b27e5 TM |
90 | status = nfs4_proc_setclientid_confirm(clp, &clid, cred); |
91 | if (status != 0) | |
92 | goto out; | |
fd954ae1 | 93 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
bb8b27e5 TM |
94 | nfs4_schedule_state_renewal(clp); |
95 | out: | |
1da177e4 LT |
96 | return status; |
97 | } | |
98 | ||
a7b72103 | 99 | struct rpc_cred *nfs4_get_machine_cred_locked(struct nfs_client *clp) |
a2b2bb88 TM |
100 | { |
101 | struct rpc_cred *cred = NULL; | |
102 | ||
a2b2bb88 TM |
103 | if (clp->cl_machine_cred != NULL) |
104 | cred = get_rpccred(clp->cl_machine_cred); | |
a2b2bb88 TM |
105 | return cred; |
106 | } | |
107 | ||
108 | static void nfs4_clear_machine_cred(struct nfs_client *clp) | |
109 | { | |
110 | struct rpc_cred *cred; | |
111 | ||
112 | spin_lock(&clp->cl_lock); | |
113 | cred = clp->cl_machine_cred; | |
114 | clp->cl_machine_cred = NULL; | |
115 | spin_unlock(&clp->cl_lock); | |
116 | if (cred != NULL) | |
117 | put_rpccred(cred); | |
118 | } | |
119 | ||
24d292b8 CL |
120 | static struct rpc_cred * |
121 | nfs4_get_renew_cred_server_locked(struct nfs_server *server) | |
b4454fe1 | 122 | { |
24d292b8 | 123 | struct rpc_cred *cred = NULL; |
b4454fe1 | 124 | struct nfs4_state_owner *sp; |
9f958ab8 | 125 | struct rb_node *pos; |
b4454fe1 | 126 | |
24d292b8 CL |
127 | for (pos = rb_first(&server->state_owners); |
128 | pos != NULL; | |
129 | pos = rb_next(pos)) { | |
130 | sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); | |
b4454fe1 TM |
131 | if (list_empty(&sp->so_states)) |
132 | continue; | |
133 | cred = get_rpccred(sp->so_cred); | |
134 | break; | |
135 | } | |
136 | return cred; | |
137 | } | |
138 | ||
24d292b8 CL |
139 | /** |
140 | * nfs4_get_renew_cred_locked - Acquire credential for a renew operation | |
141 | * @clp: client state handle | |
142 | * | |
143 | * Returns an rpc_cred with reference count bumped, or NULL. | |
144 | * Caller must hold clp->cl_lock. | |
145 | */ | |
146 | struct rpc_cred *nfs4_get_renew_cred_locked(struct nfs_client *clp) | |
147 | { | |
148 | struct rpc_cred *cred = NULL; | |
149 | struct nfs_server *server; | |
150 | ||
e49a29bd SP |
151 | /* Use machine credentials if available */ |
152 | cred = nfs4_get_machine_cred_locked(clp); | |
153 | if (cred != NULL) | |
154 | goto out; | |
155 | ||
24d292b8 CL |
156 | rcu_read_lock(); |
157 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { | |
158 | cred = nfs4_get_renew_cred_server_locked(server); | |
159 | if (cred != NULL) | |
160 | break; | |
161 | } | |
162 | rcu_read_unlock(); | |
e49a29bd SP |
163 | |
164 | out: | |
24d292b8 CL |
165 | return cred; |
166 | } | |
167 | ||
b4b82607 AA |
168 | #if defined(CONFIG_NFS_V4_1) |
169 | ||
9430fb6b RL |
170 | static int nfs41_setup_state_renewal(struct nfs_client *clp) |
171 | { | |
172 | int status; | |
173 | struct nfs_fsinfo fsinfo; | |
174 | ||
d6fb79d4 AA |
175 | if (!test_bit(NFS_CS_CHECK_LEASE_TIME, &clp->cl_res_state)) { |
176 | nfs4_schedule_state_renewal(clp); | |
177 | return 0; | |
178 | } | |
179 | ||
9430fb6b RL |
180 | status = nfs4_proc_get_lease_time(clp, &fsinfo); |
181 | if (status == 0) { | |
182 | /* Update lease time and schedule renewal */ | |
183 | spin_lock(&clp->cl_lock); | |
184 | clp->cl_lease_time = fsinfo.lease_time * HZ; | |
185 | clp->cl_last_renewal = jiffies; | |
186 | spin_unlock(&clp->cl_lock); | |
187 | ||
188 | nfs4_schedule_state_renewal(clp); | |
189 | } | |
190 | ||
191 | return status; | |
192 | } | |
193 | ||
42acd021 AA |
194 | /* |
195 | * Back channel returns NFS4ERR_DELAY for new requests when | |
196 | * NFS4_SESSION_DRAINING is set so there is no work to be done when draining | |
197 | * is ended. | |
198 | */ | |
5601a00d | 199 | static void nfs4_end_drain_session(struct nfs_client *clp) |
9dfdf404 | 200 | { |
5601a00d | 201 | struct nfs4_session *ses = clp->cl_session; |
961a828d | 202 | struct nfs4_slot_table *tbl; |
689cf5c1 AB |
203 | int max_slots; |
204 | ||
a2118c33 TM |
205 | if (ses == NULL) |
206 | return; | |
961a828d | 207 | tbl = &ses->fc_slot_table; |
a2118c33 | 208 | if (test_and_clear_bit(NFS4_SESSION_DRAINING, &ses->session_state)) { |
961a828d TM |
209 | spin_lock(&tbl->slot_tbl_lock); |
210 | max_slots = tbl->max_slots; | |
689cf5c1 | 211 | while (max_slots--) { |
961a828d TM |
212 | if (rpc_wake_up_first(&tbl->slot_tbl_waitq, |
213 | nfs4_set_task_privileged, | |
214 | NULL) == NULL) | |
689cf5c1 | 215 | break; |
689cf5c1 | 216 | } |
961a828d | 217 | spin_unlock(&tbl->slot_tbl_lock); |
689cf5c1 | 218 | } |
9dfdf404 RL |
219 | } |
220 | ||
42acd021 | 221 | static int nfs4_wait_on_slot_tbl(struct nfs4_slot_table *tbl) |
9dfdf404 | 222 | { |
9dfdf404 | 223 | spin_lock(&tbl->slot_tbl_lock); |
b6bf6e7d | 224 | if (tbl->highest_used_slotid != NFS4_NO_SLOT) { |
42acd021 | 225 | INIT_COMPLETION(tbl->complete); |
9dfdf404 | 226 | spin_unlock(&tbl->slot_tbl_lock); |
42acd021 | 227 | return wait_for_completion_interruptible(&tbl->complete); |
9dfdf404 RL |
228 | } |
229 | spin_unlock(&tbl->slot_tbl_lock); | |
230 | return 0; | |
231 | } | |
232 | ||
42acd021 AA |
233 | static int nfs4_begin_drain_session(struct nfs_client *clp) |
234 | { | |
235 | struct nfs4_session *ses = clp->cl_session; | |
236 | int ret = 0; | |
237 | ||
238 | set_bit(NFS4_SESSION_DRAINING, &ses->session_state); | |
239 | /* back channel */ | |
240 | ret = nfs4_wait_on_slot_tbl(&ses->bc_slot_table); | |
241 | if (ret) | |
242 | return ret; | |
243 | /* fore channel */ | |
244 | return nfs4_wait_on_slot_tbl(&ses->fc_slot_table); | |
245 | } | |
246 | ||
bda197f5 TM |
247 | static void nfs41_finish_session_reset(struct nfs_client *clp) |
248 | { | |
249 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); | |
250 | clear_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); | |
251 | /* create_session negotiated new slot table */ | |
252 | clear_bit(NFS4CLNT_RECALL_SLOT, &clp->cl_state); | |
253 | clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); | |
254 | nfs41_setup_state_renewal(clp); | |
255 | } | |
256 | ||
4d643d1d AA |
257 | int nfs41_init_clientid(struct nfs_client *clp, struct rpc_cred *cred) |
258 | { | |
259 | int status; | |
260 | ||
fd954ae1 TM |
261 | if (test_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state)) |
262 | goto do_confirm; | |
38045412 | 263 | nfs4_begin_drain_session(clp); |
4d643d1d | 264 | status = nfs4_proc_exchange_id(clp, cred); |
9430fb6b RL |
265 | if (status != 0) |
266 | goto out; | |
fd954ae1 TM |
267 | set_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
268 | do_confirm: | |
848f5bda | 269 | status = nfs4_proc_create_session(clp, cred); |
9430fb6b RL |
270 | if (status != 0) |
271 | goto out; | |
bda197f5 | 272 | nfs41_finish_session_reset(clp); |
9430fb6b RL |
273 | nfs_mark_client_ready(clp, NFS_CS_READY); |
274 | out: | |
4d643d1d AA |
275 | return status; |
276 | } | |
277 | ||
b4b82607 AA |
278 | struct rpc_cred *nfs4_get_exchange_id_cred(struct nfs_client *clp) |
279 | { | |
280 | struct rpc_cred *cred; | |
281 | ||
282 | spin_lock(&clp->cl_lock); | |
283 | cred = nfs4_get_machine_cred_locked(clp); | |
284 | spin_unlock(&clp->cl_lock); | |
285 | return cred; | |
286 | } | |
287 | ||
288 | #endif /* CONFIG_NFS_V4_1 */ | |
289 | ||
24d292b8 CL |
290 | static struct rpc_cred * |
291 | nfs4_get_setclientid_cred_server(struct nfs_server *server) | |
286d7d6a | 292 | { |
24d292b8 CL |
293 | struct nfs_client *clp = server->nfs_client; |
294 | struct rpc_cred *cred = NULL; | |
286d7d6a | 295 | struct nfs4_state_owner *sp; |
9f958ab8 | 296 | struct rb_node *pos; |
24d292b8 CL |
297 | |
298 | spin_lock(&clp->cl_lock); | |
299 | pos = rb_first(&server->state_owners); | |
300 | if (pos != NULL) { | |
301 | sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); | |
302 | cred = get_rpccred(sp->so_cred); | |
303 | } | |
304 | spin_unlock(&clp->cl_lock); | |
305 | return cred; | |
306 | } | |
307 | ||
308 | /** | |
309 | * nfs4_get_setclientid_cred - Acquire credential for a setclientid operation | |
310 | * @clp: client state handle | |
311 | * | |
312 | * Returns an rpc_cred with reference count bumped, or NULL. | |
313 | */ | |
314 | struct rpc_cred *nfs4_get_setclientid_cred(struct nfs_client *clp) | |
315 | { | |
316 | struct nfs_server *server; | |
a2b2bb88 | 317 | struct rpc_cred *cred; |
286d7d6a | 318 | |
6dc9d57a TM |
319 | spin_lock(&clp->cl_lock); |
320 | cred = nfs4_get_machine_cred_locked(clp); | |
24d292b8 | 321 | spin_unlock(&clp->cl_lock); |
a2b2bb88 TM |
322 | if (cred != NULL) |
323 | goto out; | |
24d292b8 CL |
324 | |
325 | rcu_read_lock(); | |
326 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { | |
327 | cred = nfs4_get_setclientid_cred_server(server); | |
328 | if (cred != NULL) | |
329 | break; | |
286d7d6a | 330 | } |
24d292b8 CL |
331 | rcu_read_unlock(); |
332 | ||
a2b2bb88 TM |
333 | out: |
334 | return cred; | |
286d7d6a TM |
335 | } |
336 | ||
1da177e4 | 337 | static struct nfs4_state_owner * |
24d292b8 | 338 | nfs4_find_state_owner_locked(struct nfs_server *server, struct rpc_cred *cred) |
1da177e4 | 339 | { |
24d292b8 | 340 | struct rb_node **p = &server->state_owners.rb_node, |
9f958ab8 | 341 | *parent = NULL; |
414adf14 | 342 | struct nfs4_state_owner *sp; |
1da177e4 | 343 | |
9f958ab8 TM |
344 | while (*p != NULL) { |
345 | parent = *p; | |
24d292b8 | 346 | sp = rb_entry(parent, struct nfs4_state_owner, so_server_node); |
9f958ab8 TM |
347 | |
348 | if (cred < sp->so_cred) | |
349 | p = &parent->rb_left; | |
350 | else if (cred > sp->so_cred) | |
351 | p = &parent->rb_right; | |
352 | else { | |
0aaaf5c4 CL |
353 | if (!list_empty(&sp->so_lru)) |
354 | list_del_init(&sp->so_lru); | |
9f958ab8 | 355 | atomic_inc(&sp->so_count); |
414adf14 | 356 | return sp; |
9f958ab8 | 357 | } |
1da177e4 | 358 | } |
414adf14 | 359 | return NULL; |
1da177e4 LT |
360 | } |
361 | ||
9f958ab8 | 362 | static struct nfs4_state_owner * |
24d292b8 | 363 | nfs4_insert_state_owner_locked(struct nfs4_state_owner *new) |
9f958ab8 | 364 | { |
24d292b8 CL |
365 | struct nfs_server *server = new->so_server; |
366 | struct rb_node **p = &server->state_owners.rb_node, | |
9f958ab8 TM |
367 | *parent = NULL; |
368 | struct nfs4_state_owner *sp; | |
9157c31d | 369 | int err; |
9f958ab8 TM |
370 | |
371 | while (*p != NULL) { | |
372 | parent = *p; | |
24d292b8 | 373 | sp = rb_entry(parent, struct nfs4_state_owner, so_server_node); |
9f958ab8 TM |
374 | |
375 | if (new->so_cred < sp->so_cred) | |
376 | p = &parent->rb_left; | |
377 | else if (new->so_cred > sp->so_cred) | |
378 | p = &parent->rb_right; | |
379 | else { | |
0aaaf5c4 CL |
380 | if (!list_empty(&sp->so_lru)) |
381 | list_del_init(&sp->so_lru); | |
9f958ab8 TM |
382 | atomic_inc(&sp->so_count); |
383 | return sp; | |
384 | } | |
385 | } | |
48c22eb2 | 386 | err = ida_get_new(&server->openowner_id, &new->so_seqid.owner_id); |
9157c31d TM |
387 | if (err) |
388 | return ERR_PTR(err); | |
24d292b8 CL |
389 | rb_link_node(&new->so_server_node, parent, p); |
390 | rb_insert_color(&new->so_server_node, &server->state_owners); | |
9f958ab8 TM |
391 | return new; |
392 | } | |
393 | ||
394 | static void | |
24d292b8 | 395 | nfs4_remove_state_owner_locked(struct nfs4_state_owner *sp) |
9f958ab8 | 396 | { |
24d292b8 CL |
397 | struct nfs_server *server = sp->so_server; |
398 | ||
399 | if (!RB_EMPTY_NODE(&sp->so_server_node)) | |
400 | rb_erase(&sp->so_server_node, &server->state_owners); | |
48c22eb2 | 401 | ida_remove(&server->openowner_id, sp->so_seqid.owner_id); |
9f958ab8 TM |
402 | } |
403 | ||
7ba127ab TM |
404 | static void |
405 | nfs4_init_seqid_counter(struct nfs_seqid_counter *sc) | |
406 | { | |
95b72eb0 | 407 | sc->create_time = ktime_get(); |
7ba127ab TM |
408 | sc->flags = 0; |
409 | sc->counter = 0; | |
410 | spin_lock_init(&sc->lock); | |
411 | INIT_LIST_HEAD(&sc->list); | |
412 | rpc_init_wait_queue(&sc->wait, "Seqid_waitqueue"); | |
413 | } | |
414 | ||
415 | static void | |
416 | nfs4_destroy_seqid_counter(struct nfs_seqid_counter *sc) | |
417 | { | |
418 | rpc_destroy_wait_queue(&sc->wait); | |
419 | } | |
420 | ||
1da177e4 LT |
421 | /* |
422 | * nfs4_alloc_state_owner(): this is called on the OPEN or CREATE path to | |
423 | * create a new state_owner. | |
424 | * | |
425 | */ | |
426 | static struct nfs4_state_owner * | |
d1e284d5 TM |
427 | nfs4_alloc_state_owner(struct nfs_server *server, |
428 | struct rpc_cred *cred, | |
429 | gfp_t gfp_flags) | |
1da177e4 LT |
430 | { |
431 | struct nfs4_state_owner *sp; | |
432 | ||
d1e284d5 | 433 | sp = kzalloc(sizeof(*sp), gfp_flags); |
1da177e4 LT |
434 | if (!sp) |
435 | return NULL; | |
d1e284d5 TM |
436 | sp->so_server = server; |
437 | sp->so_cred = get_rpccred(cred); | |
ec073428 | 438 | spin_lock_init(&sp->so_lock); |
1da177e4 | 439 | INIT_LIST_HEAD(&sp->so_states); |
7ba127ab | 440 | nfs4_init_seqid_counter(&sp->so_seqid); |
1da177e4 | 441 | atomic_set(&sp->so_count, 1); |
0aaaf5c4 | 442 | INIT_LIST_HEAD(&sp->so_lru); |
1da177e4 LT |
443 | return sp; |
444 | } | |
445 | ||
1d2e88e7 | 446 | static void |
1da177e4 LT |
447 | nfs4_drop_state_owner(struct nfs4_state_owner *sp) |
448 | { | |
c77365c9 TM |
449 | struct rb_node *rb_node = &sp->so_server_node; |
450 | ||
451 | if (!RB_EMPTY_NODE(rb_node)) { | |
24d292b8 CL |
452 | struct nfs_server *server = sp->so_server; |
453 | struct nfs_client *clp = server->nfs_client; | |
9f958ab8 TM |
454 | |
455 | spin_lock(&clp->cl_lock); | |
c77365c9 TM |
456 | if (!RB_EMPTY_NODE(rb_node)) { |
457 | rb_erase(rb_node, &server->state_owners); | |
458 | RB_CLEAR_NODE(rb_node); | |
459 | } | |
9f958ab8 TM |
460 | spin_unlock(&clp->cl_lock); |
461 | } | |
1da177e4 LT |
462 | } |
463 | ||
0aaaf5c4 CL |
464 | static void nfs4_free_state_owner(struct nfs4_state_owner *sp) |
465 | { | |
7ba127ab | 466 | nfs4_destroy_seqid_counter(&sp->so_seqid); |
0aaaf5c4 CL |
467 | put_rpccred(sp->so_cred); |
468 | kfree(sp); | |
469 | } | |
470 | ||
471 | static void nfs4_gc_state_owners(struct nfs_server *server) | |
472 | { | |
473 | struct nfs_client *clp = server->nfs_client; | |
474 | struct nfs4_state_owner *sp, *tmp; | |
475 | unsigned long time_min, time_max; | |
476 | LIST_HEAD(doomed); | |
477 | ||
478 | spin_lock(&clp->cl_lock); | |
479 | time_max = jiffies; | |
480 | time_min = (long)time_max - (long)clp->cl_lease_time; | |
481 | list_for_each_entry_safe(sp, tmp, &server->state_owners_lru, so_lru) { | |
482 | /* NB: LRU is sorted so that oldest is at the head */ | |
483 | if (time_in_range(sp->so_expires, time_min, time_max)) | |
484 | break; | |
485 | list_move(&sp->so_lru, &doomed); | |
486 | nfs4_remove_state_owner_locked(sp); | |
487 | } | |
488 | spin_unlock(&clp->cl_lock); | |
489 | ||
490 | list_for_each_entry_safe(sp, tmp, &doomed, so_lru) { | |
491 | list_del(&sp->so_lru); | |
492 | nfs4_free_state_owner(sp); | |
493 | } | |
494 | } | |
495 | ||
24d292b8 CL |
496 | /** |
497 | * nfs4_get_state_owner - Look up a state owner given a credential | |
498 | * @server: nfs_server to search | |
499 | * @cred: RPC credential to match | |
500 | * | |
501 | * Returns a pointer to an instantiated nfs4_state_owner struct, or NULL. | |
502 | */ | |
503 | struct nfs4_state_owner *nfs4_get_state_owner(struct nfs_server *server, | |
d1e284d5 TM |
504 | struct rpc_cred *cred, |
505 | gfp_t gfp_flags) | |
1da177e4 | 506 | { |
7539bbab | 507 | struct nfs_client *clp = server->nfs_client; |
1da177e4 LT |
508 | struct nfs4_state_owner *sp, *new; |
509 | ||
1da177e4 | 510 | spin_lock(&clp->cl_lock); |
24d292b8 | 511 | sp = nfs4_find_state_owner_locked(server, cred); |
1da177e4 | 512 | spin_unlock(&clp->cl_lock); |
1da177e4 | 513 | if (sp != NULL) |
0aaaf5c4 | 514 | goto out; |
d1e284d5 | 515 | new = nfs4_alloc_state_owner(server, cred, gfp_flags); |
9f958ab8 | 516 | if (new == NULL) |
0aaaf5c4 | 517 | goto out; |
9157c31d TM |
518 | do { |
519 | if (ida_pre_get(&server->openowner_id, gfp_flags) == 0) | |
520 | break; | |
521 | spin_lock(&clp->cl_lock); | |
522 | sp = nfs4_insert_state_owner_locked(new); | |
523 | spin_unlock(&clp->cl_lock); | |
524 | } while (sp == ERR_PTR(-EAGAIN)); | |
d1e284d5 TM |
525 | if (sp != new) |
526 | nfs4_free_state_owner(new); | |
0aaaf5c4 CL |
527 | out: |
528 | nfs4_gc_state_owners(server); | |
9f958ab8 | 529 | return sp; |
1da177e4 LT |
530 | } |
531 | ||
24d292b8 CL |
532 | /** |
533 | * nfs4_put_state_owner - Release a nfs4_state_owner | |
534 | * @sp: state owner data to release | |
7bf97bc2 TM |
535 | * |
536 | * Note that we keep released state owners on an LRU | |
537 | * list. | |
538 | * This caches valid state owners so that they can be | |
539 | * reused, to avoid the OPEN_CONFIRM on minor version 0. | |
540 | * It also pins the uniquifier of dropped state owners for | |
541 | * a while, to ensure that those state owner names are | |
542 | * never reused. | |
24d292b8 | 543 | */ |
1da177e4 LT |
544 | void nfs4_put_state_owner(struct nfs4_state_owner *sp) |
545 | { | |
0aaaf5c4 CL |
546 | struct nfs_server *server = sp->so_server; |
547 | struct nfs_client *clp = server->nfs_client; | |
1da177e4 LT |
548 | |
549 | if (!atomic_dec_and_lock(&sp->so_count, &clp->cl_lock)) | |
550 | return; | |
0aaaf5c4 | 551 | |
7bf97bc2 TM |
552 | sp->so_expires = jiffies; |
553 | list_add_tail(&sp->so_lru, &server->state_owners_lru); | |
554 | spin_unlock(&clp->cl_lock); | |
0aaaf5c4 CL |
555 | } |
556 | ||
557 | /** | |
558 | * nfs4_purge_state_owners - Release all cached state owners | |
559 | * @server: nfs_server with cached state owners to release | |
560 | * | |
561 | * Called at umount time. Remaining state owners will be on | |
562 | * the LRU with ref count of zero. | |
563 | */ | |
564 | void nfs4_purge_state_owners(struct nfs_server *server) | |
565 | { | |
566 | struct nfs_client *clp = server->nfs_client; | |
567 | struct nfs4_state_owner *sp, *tmp; | |
568 | LIST_HEAD(doomed); | |
569 | ||
570 | spin_lock(&clp->cl_lock); | |
571 | list_for_each_entry_safe(sp, tmp, &server->state_owners_lru, so_lru) { | |
572 | list_move(&sp->so_lru, &doomed); | |
573 | nfs4_remove_state_owner_locked(sp); | |
574 | } | |
1da177e4 | 575 | spin_unlock(&clp->cl_lock); |
0aaaf5c4 CL |
576 | |
577 | list_for_each_entry_safe(sp, tmp, &doomed, so_lru) { | |
578 | list_del(&sp->so_lru); | |
579 | nfs4_free_state_owner(sp); | |
580 | } | |
1da177e4 LT |
581 | } |
582 | ||
583 | static struct nfs4_state * | |
584 | nfs4_alloc_open_state(void) | |
585 | { | |
586 | struct nfs4_state *state; | |
587 | ||
8535b2be | 588 | state = kzalloc(sizeof(*state), GFP_NOFS); |
1da177e4 LT |
589 | if (!state) |
590 | return NULL; | |
1da177e4 LT |
591 | atomic_set(&state->count, 1); |
592 | INIT_LIST_HEAD(&state->lock_states); | |
8d0a8a9d | 593 | spin_lock_init(&state->state_lock); |
8bda4e4c | 594 | seqlock_init(&state->seqlock); |
1da177e4 LT |
595 | return state; |
596 | } | |
597 | ||
4cecb76f | 598 | void |
dc0b027d | 599 | nfs4_state_set_mode_locked(struct nfs4_state *state, fmode_t fmode) |
4cecb76f | 600 | { |
dc0b027d | 601 | if (state->state == fmode) |
4cecb76f TM |
602 | return; |
603 | /* NB! List reordering - see the reclaim code for why. */ | |
dc0b027d TM |
604 | if ((fmode & FMODE_WRITE) != (state->state & FMODE_WRITE)) { |
605 | if (fmode & FMODE_WRITE) | |
4cecb76f TM |
606 | list_move(&state->open_states, &state->owner->so_states); |
607 | else | |
608 | list_move_tail(&state->open_states, &state->owner->so_states); | |
609 | } | |
dc0b027d | 610 | state->state = fmode; |
4cecb76f TM |
611 | } |
612 | ||
1da177e4 LT |
613 | static struct nfs4_state * |
614 | __nfs4_find_state_byowner(struct inode *inode, struct nfs4_state_owner *owner) | |
615 | { | |
616 | struct nfs_inode *nfsi = NFS_I(inode); | |
617 | struct nfs4_state *state; | |
618 | ||
619 | list_for_each_entry(state, &nfsi->open_states, inode_states) { | |
1c816efa | 620 | if (state->owner != owner) |
1da177e4 | 621 | continue; |
1c816efa | 622 | if (atomic_inc_not_zero(&state->count)) |
1da177e4 | 623 | return state; |
1da177e4 LT |
624 | } |
625 | return NULL; | |
626 | } | |
627 | ||
1da177e4 LT |
628 | static void |
629 | nfs4_free_open_state(struct nfs4_state *state) | |
630 | { | |
631 | kfree(state); | |
632 | } | |
633 | ||
634 | struct nfs4_state * | |
635 | nfs4_get_open_state(struct inode *inode, struct nfs4_state_owner *owner) | |
636 | { | |
637 | struct nfs4_state *state, *new; | |
638 | struct nfs_inode *nfsi = NFS_I(inode); | |
639 | ||
640 | spin_lock(&inode->i_lock); | |
641 | state = __nfs4_find_state_byowner(inode, owner); | |
642 | spin_unlock(&inode->i_lock); | |
643 | if (state) | |
644 | goto out; | |
645 | new = nfs4_alloc_open_state(); | |
ec073428 | 646 | spin_lock(&owner->so_lock); |
1da177e4 LT |
647 | spin_lock(&inode->i_lock); |
648 | state = __nfs4_find_state_byowner(inode, owner); | |
649 | if (state == NULL && new != NULL) { | |
650 | state = new; | |
1da177e4 LT |
651 | state->owner = owner; |
652 | atomic_inc(&owner->so_count); | |
653 | list_add(&state->inode_states, &nfsi->open_states); | |
0444d76a DC |
654 | ihold(inode); |
655 | state->inode = inode; | |
1da177e4 | 656 | spin_unlock(&inode->i_lock); |
ec073428 TM |
657 | /* Note: The reclaim code dictates that we add stateless |
658 | * and read-only stateids to the end of the list */ | |
659 | list_add_tail(&state->open_states, &owner->so_states); | |
660 | spin_unlock(&owner->so_lock); | |
1da177e4 LT |
661 | } else { |
662 | spin_unlock(&inode->i_lock); | |
ec073428 | 663 | spin_unlock(&owner->so_lock); |
1da177e4 LT |
664 | if (new) |
665 | nfs4_free_open_state(new); | |
666 | } | |
667 | out: | |
668 | return state; | |
669 | } | |
670 | ||
1da177e4 LT |
671 | void nfs4_put_open_state(struct nfs4_state *state) |
672 | { | |
673 | struct inode *inode = state->inode; | |
674 | struct nfs4_state_owner *owner = state->owner; | |
675 | ||
ec073428 | 676 | if (!atomic_dec_and_lock(&state->count, &owner->so_lock)) |
1da177e4 | 677 | return; |
ec073428 | 678 | spin_lock(&inode->i_lock); |
ba683031 | 679 | list_del(&state->inode_states); |
1da177e4 | 680 | list_del(&state->open_states); |
ec073428 TM |
681 | spin_unlock(&inode->i_lock); |
682 | spin_unlock(&owner->so_lock); | |
1da177e4 | 683 | iput(inode); |
1da177e4 LT |
684 | nfs4_free_open_state(state); |
685 | nfs4_put_state_owner(owner); | |
686 | } | |
687 | ||
688 | /* | |
83c9d41e | 689 | * Close the current file. |
1da177e4 | 690 | */ |
643168c2 | 691 | static void __nfs4_close(struct nfs4_state *state, |
8535b2be | 692 | fmode_t fmode, gfp_t gfp_mask, int wait) |
1da177e4 | 693 | { |
1da177e4 | 694 | struct nfs4_state_owner *owner = state->owner; |
003707c7 | 695 | int call_close = 0; |
dc0b027d | 696 | fmode_t newstate; |
1da177e4 LT |
697 | |
698 | atomic_inc(&owner->so_count); | |
1da177e4 | 699 | /* Protect against nfs4_find_state() */ |
ec073428 | 700 | spin_lock(&owner->so_lock); |
dc0b027d | 701 | switch (fmode & (FMODE_READ | FMODE_WRITE)) { |
e7616923 TM |
702 | case FMODE_READ: |
703 | state->n_rdonly--; | |
704 | break; | |
705 | case FMODE_WRITE: | |
706 | state->n_wronly--; | |
707 | break; | |
708 | case FMODE_READ|FMODE_WRITE: | |
709 | state->n_rdwr--; | |
710 | } | |
003707c7 | 711 | newstate = FMODE_READ|FMODE_WRITE; |
e7616923 | 712 | if (state->n_rdwr == 0) { |
003707c7 | 713 | if (state->n_rdonly == 0) { |
e7616923 | 714 | newstate &= ~FMODE_READ; |
003707c7 TM |
715 | call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags); |
716 | call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); | |
717 | } | |
718 | if (state->n_wronly == 0) { | |
e7616923 | 719 | newstate &= ~FMODE_WRITE; |
003707c7 TM |
720 | call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags); |
721 | call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); | |
722 | } | |
723 | if (newstate == 0) | |
724 | clear_bit(NFS_DELEGATED_STATE, &state->flags); | |
e7616923 | 725 | } |
003707c7 | 726 | nfs4_state_set_mode_locked(state, newstate); |
ec073428 | 727 | spin_unlock(&owner->so_lock); |
4cecb76f | 728 | |
003707c7 | 729 | if (!call_close) { |
b39e625b TM |
730 | nfs4_put_open_state(state); |
731 | nfs4_put_state_owner(owner); | |
f7e8917a FI |
732 | } else { |
733 | bool roc = pnfs_roc(state->inode); | |
734 | ||
643168c2 | 735 | nfs4_do_close(state, gfp_mask, wait, roc); |
f7e8917a | 736 | } |
a49c3c77 TM |
737 | } |
738 | ||
643168c2 | 739 | void nfs4_close_state(struct nfs4_state *state, fmode_t fmode) |
a49c3c77 | 740 | { |
643168c2 | 741 | __nfs4_close(state, fmode, GFP_NOFS, 0); |
a49c3c77 TM |
742 | } |
743 | ||
643168c2 | 744 | void nfs4_close_sync(struct nfs4_state *state, fmode_t fmode) |
a49c3c77 | 745 | { |
643168c2 | 746 | __nfs4_close(state, fmode, GFP_KERNEL, 1); |
1da177e4 LT |
747 | } |
748 | ||
749 | /* | |
750 | * Search the state->lock_states for an existing lock_owner | |
751 | * that is compatible with current->files | |
752 | */ | |
753 | static struct nfs4_lock_state * | |
77041ed9 | 754 | __nfs4_find_lock_state(struct nfs4_state *state, fl_owner_t fl_owner, pid_t fl_pid, unsigned int type) |
1da177e4 LT |
755 | { |
756 | struct nfs4_lock_state *pos; | |
757 | list_for_each_entry(pos, &state->lock_states, ls_locks) { | |
77041ed9 | 758 | if (type != NFS4_ANY_LOCK_TYPE && pos->ls_owner.lo_type != type) |
1da177e4 | 759 | continue; |
77041ed9 TM |
760 | switch (pos->ls_owner.lo_type) { |
761 | case NFS4_POSIX_LOCK_TYPE: | |
762 | if (pos->ls_owner.lo_u.posix_owner != fl_owner) | |
763 | continue; | |
764 | break; | |
765 | case NFS4_FLOCK_LOCK_TYPE: | |
766 | if (pos->ls_owner.lo_u.flock_owner != fl_pid) | |
767 | continue; | |
768 | } | |
1da177e4 LT |
769 | atomic_inc(&pos->ls_count); |
770 | return pos; | |
771 | } | |
772 | return NULL; | |
773 | } | |
774 | ||
1da177e4 LT |
775 | /* |
776 | * Return a compatible lock_state. If no initialized lock_state structure | |
777 | * exists, return an uninitialized one. | |
778 | * | |
1da177e4 | 779 | */ |
77041ed9 | 780 | 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 |
781 | { |
782 | struct nfs4_lock_state *lsp; | |
24d292b8 | 783 | struct nfs_server *server = state->owner->so_server; |
1da177e4 | 784 | |
8535b2be | 785 | lsp = kzalloc(sizeof(*lsp), GFP_NOFS); |
1da177e4 LT |
786 | if (lsp == NULL) |
787 | return NULL; | |
7ba127ab | 788 | nfs4_init_seqid_counter(&lsp->ls_seqid); |
1da177e4 | 789 | atomic_set(&lsp->ls_count, 1); |
b64aec8d | 790 | lsp->ls_state = state; |
77041ed9 TM |
791 | lsp->ls_owner.lo_type = type; |
792 | switch (lsp->ls_owner.lo_type) { | |
793 | case NFS4_FLOCK_LOCK_TYPE: | |
794 | lsp->ls_owner.lo_u.flock_owner = fl_pid; | |
795 | break; | |
796 | case NFS4_POSIX_LOCK_TYPE: | |
797 | lsp->ls_owner.lo_u.posix_owner = fl_owner; | |
798 | break; | |
799 | default: | |
d2d7ce28 | 800 | goto out_free; |
77041ed9 | 801 | } |
48c22eb2 TM |
802 | lsp->ls_seqid.owner_id = ida_simple_get(&server->lockowner_id, 0, 0, GFP_NOFS); |
803 | if (lsp->ls_seqid.owner_id < 0) | |
d2d7ce28 | 804 | goto out_free; |
8d0a8a9d | 805 | INIT_LIST_HEAD(&lsp->ls_locks); |
1da177e4 | 806 | return lsp; |
d2d7ce28 TM |
807 | out_free: |
808 | kfree(lsp); | |
809 | return NULL; | |
1da177e4 LT |
810 | } |
811 | ||
5ae67c4f | 812 | void nfs4_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp) |
9f958ab8 | 813 | { |
48c22eb2 | 814 | ida_simple_remove(&server->lockowner_id, lsp->ls_seqid.owner_id); |
7ba127ab | 815 | nfs4_destroy_seqid_counter(&lsp->ls_seqid); |
9f958ab8 TM |
816 | kfree(lsp); |
817 | } | |
818 | ||
1da177e4 LT |
819 | /* |
820 | * Return a compatible lock_state. If no initialized lock_state structure | |
821 | * exists, return an uninitialized one. | |
822 | * | |
1da177e4 | 823 | */ |
77041ed9 | 824 | static struct nfs4_lock_state *nfs4_get_lock_state(struct nfs4_state *state, fl_owner_t owner, pid_t pid, unsigned int type) |
1da177e4 | 825 | { |
8d0a8a9d | 826 | struct nfs4_lock_state *lsp, *new = NULL; |
1da177e4 | 827 | |
8d0a8a9d TM |
828 | for(;;) { |
829 | spin_lock(&state->state_lock); | |
77041ed9 | 830 | lsp = __nfs4_find_lock_state(state, owner, pid, type); |
8d0a8a9d TM |
831 | if (lsp != NULL) |
832 | break; | |
833 | if (new != NULL) { | |
8d0a8a9d TM |
834 | list_add(&new->ls_locks, &state->lock_states); |
835 | set_bit(LK_STATE_IN_USE, &state->flags); | |
836 | lsp = new; | |
837 | new = NULL; | |
838 | break; | |
839 | } | |
840 | spin_unlock(&state->state_lock); | |
77041ed9 | 841 | new = nfs4_alloc_lock_state(state, owner, pid, type); |
8d0a8a9d TM |
842 | if (new == NULL) |
843 | return NULL; | |
844 | } | |
845 | spin_unlock(&state->state_lock); | |
9f958ab8 | 846 | if (new != NULL) |
5ae67c4f | 847 | nfs4_free_lock_state(state->owner->so_server, new); |
1da177e4 LT |
848 | return lsp; |
849 | } | |
850 | ||
851 | /* | |
8d0a8a9d TM |
852 | * Release reference to lock_state, and free it if we see that |
853 | * it is no longer in use | |
1da177e4 | 854 | */ |
faf5f49c | 855 | void nfs4_put_lock_state(struct nfs4_lock_state *lsp) |
1da177e4 | 856 | { |
8d0a8a9d | 857 | struct nfs4_state *state; |
1da177e4 | 858 | |
8d0a8a9d TM |
859 | if (lsp == NULL) |
860 | return; | |
861 | state = lsp->ls_state; | |
862 | if (!atomic_dec_and_lock(&lsp->ls_count, &state->state_lock)) | |
863 | return; | |
864 | list_del(&lsp->ls_locks); | |
865 | if (list_empty(&state->lock_states)) | |
866 | clear_bit(LK_STATE_IN_USE, &state->flags); | |
867 | spin_unlock(&state->state_lock); | |
cf470c3e TM |
868 | if (lsp->ls_flags & NFS_LOCK_INITIALIZED) { |
869 | if (nfs4_release_lockowner(lsp) == 0) | |
870 | return; | |
871 | } | |
5ae67c4f | 872 | nfs4_free_lock_state(lsp->ls_state->owner->so_server, lsp); |
1da177e4 LT |
873 | } |
874 | ||
8d0a8a9d | 875 | static void nfs4_fl_copy_lock(struct file_lock *dst, struct file_lock *src) |
1da177e4 | 876 | { |
8d0a8a9d | 877 | struct nfs4_lock_state *lsp = src->fl_u.nfs4_fl.owner; |
1da177e4 | 878 | |
8d0a8a9d TM |
879 | dst->fl_u.nfs4_fl.owner = lsp; |
880 | atomic_inc(&lsp->ls_count); | |
881 | } | |
1da177e4 | 882 | |
8d0a8a9d | 883 | static void nfs4_fl_release_lock(struct file_lock *fl) |
1da177e4 | 884 | { |
8d0a8a9d | 885 | nfs4_put_lock_state(fl->fl_u.nfs4_fl.owner); |
1da177e4 LT |
886 | } |
887 | ||
6aed6285 | 888 | static const struct file_lock_operations nfs4_fl_lock_ops = { |
8d0a8a9d TM |
889 | .fl_copy_lock = nfs4_fl_copy_lock, |
890 | .fl_release_private = nfs4_fl_release_lock, | |
891 | }; | |
892 | ||
893 | int nfs4_set_lock_state(struct nfs4_state *state, struct file_lock *fl) | |
1da177e4 | 894 | { |
8d0a8a9d TM |
895 | struct nfs4_lock_state *lsp; |
896 | ||
897 | if (fl->fl_ops != NULL) | |
898 | return 0; | |
77041ed9 TM |
899 | if (fl->fl_flags & FL_POSIX) |
900 | lsp = nfs4_get_lock_state(state, fl->fl_owner, 0, NFS4_POSIX_LOCK_TYPE); | |
901 | else if (fl->fl_flags & FL_FLOCK) | |
17280175 TM |
902 | lsp = nfs4_get_lock_state(state, NULL, fl->fl_pid, |
903 | NFS4_FLOCK_LOCK_TYPE); | |
77041ed9 TM |
904 | else |
905 | return -EINVAL; | |
8d0a8a9d TM |
906 | if (lsp == NULL) |
907 | return -ENOMEM; | |
908 | fl->fl_u.nfs4_fl.owner = lsp; | |
909 | fl->fl_ops = &nfs4_fl_lock_ops; | |
910 | return 0; | |
1da177e4 LT |
911 | } |
912 | ||
4fc8796d TM |
913 | static bool nfs4_copy_lock_stateid(nfs4_stateid *dst, struct nfs4_state *state, |
914 | fl_owner_t fl_owner, pid_t fl_pid) | |
1da177e4 | 915 | { |
8d0a8a9d | 916 | struct nfs4_lock_state *lsp; |
4fc8796d | 917 | bool ret = false; |
1da177e4 | 918 | |
8d0a8a9d | 919 | if (test_bit(LK_STATE_IN_USE, &state->flags) == 0) |
4fc8796d | 920 | goto out; |
1da177e4 | 921 | |
8d0a8a9d | 922 | spin_lock(&state->state_lock); |
77041ed9 | 923 | lsp = __nfs4_find_lock_state(state, fl_owner, fl_pid, NFS4_ANY_LOCK_TYPE); |
4fc8796d | 924 | if (lsp != NULL && (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0) { |
f597c537 | 925 | nfs4_stateid_copy(dst, &lsp->ls_stateid); |
4fc8796d TM |
926 | ret = true; |
927 | } | |
8d0a8a9d | 928 | spin_unlock(&state->state_lock); |
1da177e4 | 929 | nfs4_put_lock_state(lsp); |
4fc8796d TM |
930 | out: |
931 | return ret; | |
932 | } | |
933 | ||
934 | static void nfs4_copy_open_stateid(nfs4_stateid *dst, struct nfs4_state *state) | |
935 | { | |
936 | int seq; | |
937 | ||
938 | do { | |
939 | seq = read_seqbegin(&state->seqlock); | |
940 | nfs4_stateid_copy(dst, &state->stateid); | |
941 | } while (read_seqretry(&state->seqlock, seq)); | |
942 | } | |
943 | ||
944 | /* | |
945 | * Byte-range lock aware utility to initialize the stateid of read/write | |
946 | * requests. | |
947 | */ | |
948 | void nfs4_select_rw_stateid(nfs4_stateid *dst, struct nfs4_state *state, | |
949 | fmode_t fmode, fl_owner_t fl_owner, pid_t fl_pid) | |
950 | { | |
951 | if (nfs4_copy_delegation_stateid(dst, state->inode, fmode)) | |
952 | return; | |
953 | if (nfs4_copy_lock_stateid(dst, state, fl_owner, fl_pid)) | |
954 | return; | |
955 | nfs4_copy_open_stateid(dst, state); | |
1da177e4 LT |
956 | } |
957 | ||
8535b2be | 958 | struct nfs_seqid *nfs_alloc_seqid(struct nfs_seqid_counter *counter, gfp_t gfp_mask) |
cee54fc9 | 959 | { |
cee54fc9 TM |
960 | struct nfs_seqid *new; |
961 | ||
8535b2be | 962 | new = kmalloc(sizeof(*new), gfp_mask); |
cee54fc9 TM |
963 | if (new != NULL) { |
964 | new->sequence = counter; | |
2f74c0a0 | 965 | INIT_LIST_HEAD(&new->list); |
4601df20 | 966 | new->task = NULL; |
cee54fc9 TM |
967 | } |
968 | return new; | |
969 | } | |
970 | ||
72211dbe | 971 | void nfs_release_seqid(struct nfs_seqid *seqid) |
1da177e4 | 972 | { |
4601df20 | 973 | struct nfs_seqid_counter *sequence; |
cee54fc9 | 974 | |
4601df20 TM |
975 | if (list_empty(&seqid->list)) |
976 | return; | |
977 | sequence = seqid->sequence; | |
978 | spin_lock(&sequence->lock); | |
979 | list_del_init(&seqid->list); | |
980 | if (!list_empty(&sequence->list)) { | |
981 | struct nfs_seqid *next; | |
982 | ||
983 | next = list_first_entry(&sequence->list, | |
984 | struct nfs_seqid, list); | |
985 | rpc_wake_up_queued_task(&sequence->wait, next->task); | |
2f74c0a0 | 986 | } |
4601df20 | 987 | spin_unlock(&sequence->lock); |
72211dbe TM |
988 | } |
989 | ||
990 | void nfs_free_seqid(struct nfs_seqid *seqid) | |
991 | { | |
992 | nfs_release_seqid(seqid); | |
cee54fc9 | 993 | kfree(seqid); |
1da177e4 LT |
994 | } |
995 | ||
996 | /* | |
cee54fc9 TM |
997 | * Increment the seqid if the OPEN/OPEN_DOWNGRADE/CLOSE succeeded, or |
998 | * failed with a seqid incrementing error - | |
999 | * see comments nfs_fs.h:seqid_mutating_error() | |
1000 | */ | |
88d90939 | 1001 | static void nfs_increment_seqid(int status, struct nfs_seqid *seqid) |
cee54fc9 | 1002 | { |
7ba127ab | 1003 | BUG_ON(list_first_entry(&seqid->sequence->list, struct nfs_seqid, list) != seqid); |
cee54fc9 TM |
1004 | switch (status) { |
1005 | case 0: | |
1006 | break; | |
1007 | case -NFS4ERR_BAD_SEQID: | |
6f43ddcc TM |
1008 | if (seqid->sequence->flags & NFS_SEQID_CONFIRMED) |
1009 | return; | |
9a3ba432 | 1010 | pr_warn_ratelimited("NFS: v4 server returned a bad" |
497799e7 DM |
1011 | " sequence-id error on an" |
1012 | " unconfirmed sequence %p!\n", | |
6f43ddcc | 1013 | seqid->sequence); |
cee54fc9 TM |
1014 | case -NFS4ERR_STALE_CLIENTID: |
1015 | case -NFS4ERR_STALE_STATEID: | |
1016 | case -NFS4ERR_BAD_STATEID: | |
1017 | case -NFS4ERR_BADXDR: | |
1018 | case -NFS4ERR_RESOURCE: | |
1019 | case -NFS4ERR_NOFILEHANDLE: | |
1020 | /* Non-seqid mutating errors */ | |
1021 | return; | |
1022 | }; | |
1023 | /* | |
1024 | * Note: no locking needed as we are guaranteed to be first | |
1025 | * on the sequence list | |
1026 | */ | |
1027 | seqid->sequence->counter++; | |
1028 | } | |
1029 | ||
1030 | void nfs_increment_open_seqid(int status, struct nfs_seqid *seqid) | |
1031 | { | |
34dc1ad7 BH |
1032 | struct nfs4_state_owner *sp = container_of(seqid->sequence, |
1033 | struct nfs4_state_owner, so_seqid); | |
1034 | struct nfs_server *server = sp->so_server; | |
1035 | ||
1036 | if (status == -NFS4ERR_BAD_SEQID) | |
1da177e4 | 1037 | nfs4_drop_state_owner(sp); |
34dc1ad7 BH |
1038 | if (!nfs4_has_session(server->nfs_client)) |
1039 | nfs_increment_seqid(status, seqid); | |
cee54fc9 TM |
1040 | } |
1041 | ||
1042 | /* | |
cee54fc9 TM |
1043 | * Increment the seqid if the LOCK/LOCKU succeeded, or |
1044 | * failed with a seqid incrementing error - | |
1045 | * see comments nfs_fs.h:seqid_mutating_error() | |
1046 | */ | |
1047 | void nfs_increment_lock_seqid(int status, struct nfs_seqid *seqid) | |
1048 | { | |
88d90939 | 1049 | nfs_increment_seqid(status, seqid); |
cee54fc9 TM |
1050 | } |
1051 | ||
1052 | int nfs_wait_on_sequence(struct nfs_seqid *seqid, struct rpc_task *task) | |
1053 | { | |
7ba127ab | 1054 | struct nfs_seqid_counter *sequence = seqid->sequence; |
cee54fc9 TM |
1055 | int status = 0; |
1056 | ||
1057 | spin_lock(&sequence->lock); | |
4601df20 | 1058 | seqid->task = task; |
2f74c0a0 TM |
1059 | if (list_empty(&seqid->list)) |
1060 | list_add_tail(&seqid->list, &sequence->list); | |
1061 | if (list_first_entry(&sequence->list, struct nfs_seqid, list) == seqid) | |
1062 | goto unlock; | |
5d00837b | 1063 | rpc_sleep_on(&sequence->wait, task, NULL); |
2f74c0a0 TM |
1064 | status = -EAGAIN; |
1065 | unlock: | |
cee54fc9 TM |
1066 | spin_unlock(&sequence->lock); |
1067 | return status; | |
1da177e4 LT |
1068 | } |
1069 | ||
e005e804 | 1070 | static int nfs4_run_state_manager(void *); |
1da177e4 | 1071 | |
e005e804 | 1072 | static void nfs4_clear_state_manager_bit(struct nfs_client *clp) |
433fbe4c TM |
1073 | { |
1074 | smp_mb__before_clear_bit(); | |
e005e804 | 1075 | clear_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state); |
433fbe4c | 1076 | smp_mb__after_clear_bit(); |
e005e804 | 1077 | wake_up_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING); |
433fbe4c TM |
1078 | rpc_wake_up(&clp->cl_rpcwaitq); |
1079 | } | |
1080 | ||
1da177e4 | 1081 | /* |
e005e804 | 1082 | * Schedule the nfs_client asynchronous state management routine |
1da177e4 | 1083 | */ |
b0d3ded1 | 1084 | void nfs4_schedule_state_manager(struct nfs_client *clp) |
1da177e4 | 1085 | { |
5043e900 | 1086 | struct task_struct *task; |
2446ab60 | 1087 | char buf[INET6_ADDRSTRLEN + sizeof("-manager") + 1]; |
1da177e4 | 1088 | |
e005e804 TM |
1089 | if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) != 0) |
1090 | return; | |
5043e900 TM |
1091 | __module_get(THIS_MODULE); |
1092 | atomic_inc(&clp->cl_count); | |
2446ab60 TM |
1093 | |
1094 | /* The rcu_read_lock() is not strictly necessary, as the state | |
1095 | * manager is the only thread that ever changes the rpc_xprt | |
1096 | * after it's initialized. At this point, we're single threaded. */ | |
1097 | rcu_read_lock(); | |
1098 | snprintf(buf, sizeof(buf), "%s-manager", | |
1099 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)); | |
1100 | rcu_read_unlock(); | |
1101 | task = kthread_run(nfs4_run_state_manager, clp, buf); | |
1102 | if (IS_ERR(task)) { | |
1103 | printk(KERN_ERR "%s: kthread_run: %ld\n", | |
1104 | __func__, PTR_ERR(task)); | |
1105 | nfs4_clear_state_manager_bit(clp); | |
1106 | nfs_put_client(clp); | |
1107 | module_put(THIS_MODULE); | |
1108 | } | |
1da177e4 LT |
1109 | } |
1110 | ||
1111 | /* | |
0400a6b0 | 1112 | * Schedule a lease recovery attempt |
1da177e4 | 1113 | */ |
0400a6b0 | 1114 | void nfs4_schedule_lease_recovery(struct nfs_client *clp) |
1da177e4 LT |
1115 | { |
1116 | if (!clp) | |
1117 | return; | |
e598d843 TM |
1118 | if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
1119 | set_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); | |
cc0a9843 TM |
1120 | dprintk("%s: scheduling lease recovery for server %s\n", __func__, |
1121 | clp->cl_hostname); | |
e005e804 | 1122 | nfs4_schedule_state_manager(clp); |
1da177e4 | 1123 | } |
9cb81968 | 1124 | EXPORT_SYMBOL_GPL(nfs4_schedule_lease_recovery); |
1da177e4 | 1125 | |
ad1e3968 TM |
1126 | /* |
1127 | * nfs40_handle_cb_pathdown - return all delegations after NFS4ERR_CB_PATH_DOWN | |
1128 | * @clp: client to process | |
1129 | * | |
1130 | * Set the NFS4CLNT_LEASE_EXPIRED state in order to force a | |
1131 | * resend of the SETCLIENTID and hence re-establish the | |
1132 | * callback channel. Then return all existing delegations. | |
1133 | */ | |
1134 | static void nfs40_handle_cb_pathdown(struct nfs_client *clp) | |
1135 | { | |
1136 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1137 | nfs_expire_all_delegations(clp); | |
cc0a9843 TM |
1138 | dprintk("%s: handling CB_PATHDOWN recovery for server %s\n", __func__, |
1139 | clp->cl_hostname); | |
ad1e3968 TM |
1140 | } |
1141 | ||
042b60be TM |
1142 | void nfs4_schedule_path_down_recovery(struct nfs_client *clp) |
1143 | { | |
ad1e3968 | 1144 | nfs40_handle_cb_pathdown(clp); |
042b60be TM |
1145 | nfs4_schedule_state_manager(clp); |
1146 | } | |
1147 | ||
f9feab1e | 1148 | static int nfs4_state_mark_reclaim_reboot(struct nfs_client *clp, struct nfs4_state *state) |
b79a4a1b TM |
1149 | { |
1150 | ||
1151 | set_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); | |
1152 | /* Don't recover state that expired before the reboot */ | |
1153 | if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) { | |
1154 | clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); | |
1155 | return 0; | |
1156 | } | |
7eff03ae | 1157 | set_bit(NFS_OWNER_RECLAIM_REBOOT, &state->owner->so_flags); |
b79a4a1b TM |
1158 | set_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state); |
1159 | return 1; | |
1160 | } | |
1161 | ||
f9feab1e | 1162 | static int nfs4_state_mark_reclaim_nograce(struct nfs_client *clp, struct nfs4_state *state) |
b79a4a1b TM |
1163 | { |
1164 | set_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags); | |
1165 | clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); | |
7eff03ae | 1166 | set_bit(NFS_OWNER_RECLAIM_NOGRACE, &state->owner->so_flags); |
b79a4a1b TM |
1167 | set_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state); |
1168 | return 1; | |
1169 | } | |
1170 | ||
0400a6b0 TM |
1171 | void nfs4_schedule_stateid_recovery(const struct nfs_server *server, struct nfs4_state *state) |
1172 | { | |
1173 | struct nfs_client *clp = server->nfs_client; | |
1174 | ||
1175 | nfs4_state_mark_reclaim_nograce(clp, state); | |
cc0a9843 TM |
1176 | dprintk("%s: scheduling stateid recovery for server %s\n", __func__, |
1177 | clp->cl_hostname); | |
0400a6b0 TM |
1178 | nfs4_schedule_state_manager(clp); |
1179 | } | |
9cb81968 | 1180 | EXPORT_SYMBOL_GPL(nfs4_schedule_stateid_recovery); |
0400a6b0 | 1181 | |
a1d0b5ee TM |
1182 | void nfs_inode_find_state_and_recover(struct inode *inode, |
1183 | const nfs4_stateid *stateid) | |
1184 | { | |
1185 | struct nfs_client *clp = NFS_SERVER(inode)->nfs_client; | |
1186 | struct nfs_inode *nfsi = NFS_I(inode); | |
1187 | struct nfs_open_context *ctx; | |
1188 | struct nfs4_state *state; | |
1189 | bool found = false; | |
1190 | ||
1191 | spin_lock(&inode->i_lock); | |
1192 | list_for_each_entry(ctx, &nfsi->open_files, list) { | |
1193 | state = ctx->state; | |
1194 | if (state == NULL) | |
1195 | continue; | |
1196 | if (!test_bit(NFS_DELEGATED_STATE, &state->flags)) | |
1197 | continue; | |
f597c537 | 1198 | if (!nfs4_stateid_match(&state->stateid, stateid)) |
a1d0b5ee TM |
1199 | continue; |
1200 | nfs4_state_mark_reclaim_nograce(clp, state); | |
1201 | found = true; | |
1202 | } | |
1203 | spin_unlock(&inode->i_lock); | |
1204 | if (found) | |
1205 | nfs4_schedule_state_manager(clp); | |
1206 | } | |
1207 | ||
1208 | ||
02860014 | 1209 | static int nfs4_reclaim_locks(struct nfs4_state *state, const struct nfs4_state_recovery_ops *ops) |
1da177e4 LT |
1210 | { |
1211 | struct inode *inode = state->inode; | |
19e03c57 | 1212 | struct nfs_inode *nfsi = NFS_I(inode); |
1da177e4 LT |
1213 | struct file_lock *fl; |
1214 | int status = 0; | |
1215 | ||
3f09df70 TM |
1216 | if (inode->i_flock == NULL) |
1217 | return 0; | |
1218 | ||
1219 | /* Guard against delegation returns and new lock/unlock calls */ | |
19e03c57 | 1220 | down_write(&nfsi->rwsem); |
3f09df70 | 1221 | /* Protect inode->i_flock using the BKL */ |
b89f4321 | 1222 | lock_flocks(); |
90dc7d27 | 1223 | for (fl = inode->i_flock; fl != NULL; fl = fl->fl_next) { |
43b2a33a | 1224 | if (!(fl->fl_flags & (FL_POSIX|FL_FLOCK))) |
1da177e4 | 1225 | continue; |
cd3758e3 | 1226 | if (nfs_file_open_context(fl->fl_file)->state != state) |
1da177e4 | 1227 | continue; |
b89f4321 | 1228 | unlock_flocks(); |
1da177e4 | 1229 | status = ops->recover_lock(state, fl); |
1da177e4 | 1230 | switch (status) { |
965b5d67 TM |
1231 | case 0: |
1232 | break; | |
1233 | case -ESTALE: | |
1234 | case -NFS4ERR_ADMIN_REVOKED: | |
1235 | case -NFS4ERR_STALE_STATEID: | |
1236 | case -NFS4ERR_BAD_STATEID: | |
1237 | case -NFS4ERR_EXPIRED: | |
1238 | case -NFS4ERR_NO_GRACE: | |
1239 | case -NFS4ERR_STALE_CLIENTID: | |
9c4c761a TM |
1240 | case -NFS4ERR_BADSESSION: |
1241 | case -NFS4ERR_BADSLOT: | |
1242 | case -NFS4ERR_BAD_HIGH_SLOT: | |
1243 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
965b5d67 | 1244 | goto out; |
1da177e4 | 1245 | default: |
a030889a WAA |
1246 | printk(KERN_ERR "NFS: %s: unhandled error %d. " |
1247 | "Zeroing state\n", __func__, status); | |
965b5d67 TM |
1248 | case -ENOMEM: |
1249 | case -NFS4ERR_DENIED: | |
1da177e4 LT |
1250 | case -NFS4ERR_RECLAIM_BAD: |
1251 | case -NFS4ERR_RECLAIM_CONFLICT: | |
43b2a33a | 1252 | /* kill_proc(fl->fl_pid, SIGLOST, 1); */ |
965b5d67 | 1253 | status = 0; |
1da177e4 | 1254 | } |
b89f4321 | 1255 | lock_flocks(); |
1da177e4 | 1256 | } |
b89f4321 | 1257 | unlock_flocks(); |
965b5d67 | 1258 | out: |
19e03c57 | 1259 | up_write(&nfsi->rwsem); |
1da177e4 LT |
1260 | return status; |
1261 | } | |
1262 | ||
02860014 | 1263 | static int nfs4_reclaim_open_state(struct nfs4_state_owner *sp, const struct nfs4_state_recovery_ops *ops) |
1da177e4 LT |
1264 | { |
1265 | struct nfs4_state *state; | |
1266 | struct nfs4_lock_state *lock; | |
1267 | int status = 0; | |
1268 | ||
1269 | /* Note: we rely on the sp->so_states list being ordered | |
1270 | * so that we always reclaim open(O_RDWR) and/or open(O_WRITE) | |
1271 | * states first. | |
1272 | * This is needed to ensure that the server won't give us any | |
1273 | * read delegations that we have to return if, say, we are | |
1274 | * recovering after a network partition or a reboot from a | |
1275 | * server that doesn't support a grace period. | |
1276 | */ | |
fe1d8195 TM |
1277 | restart: |
1278 | spin_lock(&sp->so_lock); | |
1da177e4 | 1279 | list_for_each_entry(state, &sp->so_states, open_states) { |
b79a4a1b TM |
1280 | if (!test_and_clear_bit(ops->state_flag_bit, &state->flags)) |
1281 | continue; | |
1da177e4 LT |
1282 | if (state->state == 0) |
1283 | continue; | |
fe1d8195 TM |
1284 | atomic_inc(&state->count); |
1285 | spin_unlock(&sp->so_lock); | |
1da177e4 | 1286 | status = ops->recover_open(sp, state); |
1da177e4 | 1287 | if (status >= 0) { |
02860014 TM |
1288 | status = nfs4_reclaim_locks(state, ops); |
1289 | if (status >= 0) { | |
4b44b40e | 1290 | spin_lock(&state->state_lock); |
02860014 TM |
1291 | list_for_each_entry(lock, &state->lock_states, ls_locks) { |
1292 | if (!(lock->ls_flags & NFS_LOCK_INITIALIZED)) | |
96dcadc2 WD |
1293 | pr_warn_ratelimited("NFS: " |
1294 | "%s: Lock reclaim " | |
a030889a | 1295 | "failed!\n", __func__); |
02860014 | 1296 | } |
4b44b40e | 1297 | spin_unlock(&state->state_lock); |
fe1d8195 TM |
1298 | nfs4_put_open_state(state); |
1299 | goto restart; | |
1da177e4 | 1300 | } |
1da177e4 LT |
1301 | } |
1302 | switch (status) { | |
1303 | default: | |
a030889a WAA |
1304 | printk(KERN_ERR "NFS: %s: unhandled error %d. " |
1305 | "Zeroing state\n", __func__, status); | |
1da177e4 | 1306 | case -ENOENT: |
965b5d67 | 1307 | case -ENOMEM: |
b79a4a1b | 1308 | case -ESTALE: |
1da177e4 LT |
1309 | /* |
1310 | * Open state on this file cannot be recovered | |
1311 | * All we can do is revert to using the zero stateid. | |
1312 | */ | |
2d2f24ad TM |
1313 | memset(&state->stateid, 0, |
1314 | sizeof(state->stateid)); | |
1da177e4 LT |
1315 | /* Mark the file as being 'closed' */ |
1316 | state->state = 0; | |
1317 | break; | |
168667c4 TM |
1318 | case -EKEYEXPIRED: |
1319 | /* | |
1320 | * User RPCSEC_GSS context has expired. | |
1321 | * We cannot recover this stateid now, so | |
1322 | * skip it and allow recovery thread to | |
1323 | * proceed. | |
1324 | */ | |
1325 | break; | |
965b5d67 TM |
1326 | case -NFS4ERR_ADMIN_REVOKED: |
1327 | case -NFS4ERR_STALE_STATEID: | |
1328 | case -NFS4ERR_BAD_STATEID: | |
b79a4a1b TM |
1329 | case -NFS4ERR_RECLAIM_BAD: |
1330 | case -NFS4ERR_RECLAIM_CONFLICT: | |
1f0e890d | 1331 | nfs4_state_mark_reclaim_nograce(sp->so_server->nfs_client, state); |
b79a4a1b | 1332 | break; |
1da177e4 LT |
1333 | case -NFS4ERR_EXPIRED: |
1334 | case -NFS4ERR_NO_GRACE: | |
1f0e890d | 1335 | nfs4_state_mark_reclaim_nograce(sp->so_server->nfs_client, state); |
1da177e4 | 1336 | case -NFS4ERR_STALE_CLIENTID: |
9c4c761a TM |
1337 | case -NFS4ERR_BADSESSION: |
1338 | case -NFS4ERR_BADSLOT: | |
1339 | case -NFS4ERR_BAD_HIGH_SLOT: | |
1340 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
1da177e4 LT |
1341 | goto out_err; |
1342 | } | |
fe1d8195 TM |
1343 | nfs4_put_open_state(state); |
1344 | goto restart; | |
1da177e4 | 1345 | } |
fe1d8195 | 1346 | spin_unlock(&sp->so_lock); |
1da177e4 LT |
1347 | return 0; |
1348 | out_err: | |
fe1d8195 | 1349 | nfs4_put_open_state(state); |
1da177e4 LT |
1350 | return status; |
1351 | } | |
1352 | ||
b79a4a1b TM |
1353 | static void nfs4_clear_open_state(struct nfs4_state *state) |
1354 | { | |
1355 | struct nfs4_lock_state *lock; | |
1356 | ||
1357 | clear_bit(NFS_DELEGATED_STATE, &state->flags); | |
1358 | clear_bit(NFS_O_RDONLY_STATE, &state->flags); | |
1359 | clear_bit(NFS_O_WRONLY_STATE, &state->flags); | |
1360 | clear_bit(NFS_O_RDWR_STATE, &state->flags); | |
4b44b40e | 1361 | spin_lock(&state->state_lock); |
b79a4a1b | 1362 | list_for_each_entry(lock, &state->lock_states, ls_locks) { |
b79a4a1b TM |
1363 | lock->ls_seqid.flags = 0; |
1364 | lock->ls_flags &= ~NFS_LOCK_INITIALIZED; | |
1365 | } | |
4b44b40e | 1366 | spin_unlock(&state->state_lock); |
b79a4a1b TM |
1367 | } |
1368 | ||
24d292b8 CL |
1369 | static void nfs4_reset_seqids(struct nfs_server *server, |
1370 | int (*mark_reclaim)(struct nfs_client *clp, struct nfs4_state *state)) | |
cee54fc9 | 1371 | { |
24d292b8 | 1372 | struct nfs_client *clp = server->nfs_client; |
cee54fc9 | 1373 | struct nfs4_state_owner *sp; |
9f958ab8 | 1374 | struct rb_node *pos; |
cee54fc9 | 1375 | struct nfs4_state *state; |
cee54fc9 | 1376 | |
24d292b8 CL |
1377 | spin_lock(&clp->cl_lock); |
1378 | for (pos = rb_first(&server->state_owners); | |
1379 | pos != NULL; | |
1380 | pos = rb_next(pos)) { | |
1381 | sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); | |
cee54fc9 | 1382 | sp->so_seqid.flags = 0; |
ec073428 | 1383 | spin_lock(&sp->so_lock); |
cee54fc9 | 1384 | list_for_each_entry(state, &sp->so_states, open_states) { |
b79a4a1b TM |
1385 | if (mark_reclaim(clp, state)) |
1386 | nfs4_clear_open_state(state); | |
cee54fc9 | 1387 | } |
ec073428 | 1388 | spin_unlock(&sp->so_lock); |
cee54fc9 | 1389 | } |
24d292b8 CL |
1390 | spin_unlock(&clp->cl_lock); |
1391 | } | |
1392 | ||
1393 | static void nfs4_state_mark_reclaim_helper(struct nfs_client *clp, | |
1394 | int (*mark_reclaim)(struct nfs_client *clp, struct nfs4_state *state)) | |
1395 | { | |
1396 | struct nfs_server *server; | |
1397 | ||
1398 | rcu_read_lock(); | |
1399 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) | |
1400 | nfs4_reset_seqids(server, mark_reclaim); | |
1401 | rcu_read_unlock(); | |
cee54fc9 TM |
1402 | } |
1403 | ||
b79a4a1b TM |
1404 | static void nfs4_state_start_reclaim_reboot(struct nfs_client *clp) |
1405 | { | |
1406 | /* Mark all delegations for reclaim */ | |
1407 | nfs_delegation_mark_reclaim(clp); | |
1408 | nfs4_state_mark_reclaim_helper(clp, nfs4_state_mark_reclaim_reboot); | |
1409 | } | |
1410 | ||
fce5c838 RL |
1411 | static void nfs4_reclaim_complete(struct nfs_client *clp, |
1412 | const struct nfs4_state_recovery_ops *ops) | |
1413 | { | |
1414 | /* Notify the server we're done reclaiming our state */ | |
1415 | if (ops->reclaim_complete) | |
1416 | (void)ops->reclaim_complete(clp); | |
1417 | } | |
1418 | ||
24d292b8 | 1419 | static void nfs4_clear_reclaim_server(struct nfs_server *server) |
b79a4a1b | 1420 | { |
24d292b8 | 1421 | struct nfs_client *clp = server->nfs_client; |
b79a4a1b TM |
1422 | struct nfs4_state_owner *sp; |
1423 | struct rb_node *pos; | |
1424 | struct nfs4_state *state; | |
1425 | ||
24d292b8 CL |
1426 | spin_lock(&clp->cl_lock); |
1427 | for (pos = rb_first(&server->state_owners); | |
1428 | pos != NULL; | |
1429 | pos = rb_next(pos)) { | |
1430 | sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); | |
b79a4a1b TM |
1431 | spin_lock(&sp->so_lock); |
1432 | list_for_each_entry(state, &sp->so_states, open_states) { | |
24d292b8 CL |
1433 | if (!test_and_clear_bit(NFS_STATE_RECLAIM_REBOOT, |
1434 | &state->flags)) | |
b79a4a1b TM |
1435 | continue; |
1436 | nfs4_state_mark_reclaim_nograce(clp, state); | |
1437 | } | |
1438 | spin_unlock(&sp->so_lock); | |
1439 | } | |
24d292b8 CL |
1440 | spin_unlock(&clp->cl_lock); |
1441 | } | |
1442 | ||
1443 | static int nfs4_state_clear_reclaim_reboot(struct nfs_client *clp) | |
1444 | { | |
1445 | struct nfs_server *server; | |
1446 | ||
1447 | if (!test_and_clear_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) | |
1448 | return 0; | |
1449 | ||
1450 | rcu_read_lock(); | |
1451 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) | |
1452 | nfs4_clear_reclaim_server(server); | |
1453 | rcu_read_unlock(); | |
b79a4a1b TM |
1454 | |
1455 | nfs_delegation_reap_unclaimed(clp); | |
6eaa6149 TM |
1456 | return 1; |
1457 | } | |
1458 | ||
1459 | static void nfs4_state_end_reclaim_reboot(struct nfs_client *clp) | |
1460 | { | |
1461 | if (!nfs4_state_clear_reclaim_reboot(clp)) | |
1462 | return; | |
1463 | nfs4_reclaim_complete(clp, clp->cl_mvops->reboot_recovery_ops); | |
b79a4a1b TM |
1464 | } |
1465 | ||
1466 | static void nfs_delegation_clear_all(struct nfs_client *clp) | |
1467 | { | |
1468 | nfs_delegation_mark_reclaim(clp); | |
1469 | nfs_delegation_reap_unclaimed(clp); | |
1470 | } | |
1471 | ||
1472 | static void nfs4_state_start_reclaim_nograce(struct nfs_client *clp) | |
1473 | { | |
1474 | nfs_delegation_clear_all(clp); | |
1475 | nfs4_state_mark_reclaim_helper(clp, nfs4_state_mark_reclaim_nograce); | |
1476 | } | |
1477 | ||
168667c4 TM |
1478 | static void nfs4_warn_keyexpired(const char *s) |
1479 | { | |
1480 | printk_ratelimited(KERN_WARNING "Error: state manager" | |
1481 | " encountered RPCSEC_GSS session" | |
1482 | " expired against NFSv4 server %s.\n", | |
1483 | s); | |
1484 | } | |
1485 | ||
4f7cdf18 | 1486 | static int nfs4_recovery_handle_error(struct nfs_client *clp, int error) |
e598d843 TM |
1487 | { |
1488 | switch (error) { | |
4f38e4aa TM |
1489 | case 0: |
1490 | break; | |
e598d843 | 1491 | case -NFS4ERR_CB_PATH_DOWN: |
ad1e3968 | 1492 | nfs40_handle_cb_pathdown(clp); |
4f38e4aa | 1493 | break; |
c8b7ae3d TM |
1494 | case -NFS4ERR_NO_GRACE: |
1495 | nfs4_state_end_reclaim_reboot(clp); | |
4f38e4aa | 1496 | break; |
e598d843 TM |
1497 | case -NFS4ERR_STALE_CLIENTID: |
1498 | case -NFS4ERR_LEASE_MOVED: | |
1499 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
6eaa6149 | 1500 | nfs4_state_clear_reclaim_reboot(clp); |
e598d843 TM |
1501 | nfs4_state_start_reclaim_reboot(clp); |
1502 | break; | |
1503 | case -NFS4ERR_EXPIRED: | |
1504 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1505 | nfs4_state_start_reclaim_nograce(clp); | |
8ba9bf8e | 1506 | break; |
c3fad1b1 AA |
1507 | case -NFS4ERR_BADSESSION: |
1508 | case -NFS4ERR_BADSLOT: | |
1509 | case -NFS4ERR_BAD_HIGH_SLOT: | |
1510 | case -NFS4ERR_DEADSESSION: | |
c3fad1b1 AA |
1511 | case -NFS4ERR_SEQ_FALSE_RETRY: |
1512 | case -NFS4ERR_SEQ_MISORDERED: | |
6df08189 | 1513 | set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); |
0b9e2d41 | 1514 | /* Zero session reset errors */ |
4f38e4aa | 1515 | break; |
7c5d7256 TM |
1516 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: |
1517 | set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); | |
1518 | break; | |
168667c4 TM |
1519 | case -EKEYEXPIRED: |
1520 | /* Nothing we can do */ | |
1521 | nfs4_warn_keyexpired(clp->cl_hostname); | |
4f38e4aa TM |
1522 | break; |
1523 | default: | |
cc0a9843 TM |
1524 | dprintk("%s: failed to handle error %d for server %s\n", |
1525 | __func__, error, clp->cl_hostname); | |
4f38e4aa | 1526 | return error; |
e598d843 | 1527 | } |
cc0a9843 TM |
1528 | dprintk("%s: handled error %d for server %s\n", __func__, error, |
1529 | clp->cl_hostname); | |
4f38e4aa | 1530 | return 0; |
e598d843 TM |
1531 | } |
1532 | ||
02860014 | 1533 | static int nfs4_do_reclaim(struct nfs_client *clp, const struct nfs4_state_recovery_ops *ops) |
1da177e4 | 1534 | { |
24d292b8 CL |
1535 | struct nfs4_state_owner *sp; |
1536 | struct nfs_server *server; | |
9f958ab8 | 1537 | struct rb_node *pos; |
1da177e4 LT |
1538 | int status = 0; |
1539 | ||
7eff03ae | 1540 | restart: |
24d292b8 CL |
1541 | rcu_read_lock(); |
1542 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { | |
0aaaf5c4 | 1543 | nfs4_purge_state_owners(server); |
24d292b8 CL |
1544 | spin_lock(&clp->cl_lock); |
1545 | for (pos = rb_first(&server->state_owners); | |
1546 | pos != NULL; | |
1547 | pos = rb_next(pos)) { | |
1548 | sp = rb_entry(pos, | |
1549 | struct nfs4_state_owner, so_server_node); | |
1550 | if (!test_and_clear_bit(ops->owner_flag_bit, | |
1551 | &sp->so_flags)) | |
1552 | continue; | |
1553 | atomic_inc(&sp->so_count); | |
1554 | spin_unlock(&clp->cl_lock); | |
1555 | rcu_read_unlock(); | |
1556 | ||
1557 | status = nfs4_reclaim_open_state(sp, ops); | |
1558 | if (status < 0) { | |
1559 | set_bit(ops->owner_flag_bit, &sp->so_flags); | |
1560 | nfs4_put_state_owner(sp); | |
1561 | return nfs4_recovery_handle_error(clp, status); | |
1562 | } | |
1563 | ||
7eff03ae | 1564 | nfs4_put_state_owner(sp); |
24d292b8 | 1565 | goto restart; |
7eff03ae | 1566 | } |
24d292b8 | 1567 | spin_unlock(&clp->cl_lock); |
02860014 | 1568 | } |
24d292b8 | 1569 | rcu_read_unlock(); |
02860014 TM |
1570 | return status; |
1571 | } | |
1572 | ||
1573 | static int nfs4_check_lease(struct nfs_client *clp) | |
1574 | { | |
1575 | struct rpc_cred *cred; | |
c48f4f35 TM |
1576 | const struct nfs4_state_maintenance_ops *ops = |
1577 | clp->cl_mvops->state_renewal_ops; | |
4f38e4aa | 1578 | int status; |
1da177e4 | 1579 | |
0f605b56 TM |
1580 | /* Is the client already known to have an expired lease? */ |
1581 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) | |
1582 | return 0; | |
a7b72103 AA |
1583 | spin_lock(&clp->cl_lock); |
1584 | cred = ops->get_state_renewal_cred_locked(clp); | |
1585 | spin_unlock(&clp->cl_lock); | |
0f605b56 TM |
1586 | if (cred == NULL) { |
1587 | cred = nfs4_get_setclientid_cred(clp); | |
4f38e4aa | 1588 | status = -ENOKEY; |
0f605b56 TM |
1589 | if (cred == NULL) |
1590 | goto out; | |
286d7d6a | 1591 | } |
8e69514f | 1592 | status = ops->renew_lease(clp, cred); |
0f605b56 TM |
1593 | put_rpccred(cred); |
1594 | out: | |
4f7cdf18 | 1595 | return nfs4_recovery_handle_error(clp, status); |
02860014 TM |
1596 | } |
1597 | ||
2a6ee6aa TM |
1598 | /* Set NFS4CLNT_LEASE_EXPIRED for all v4.0 errors and for recoverable errors |
1599 | * on EXCHANGE_ID for v4.1 | |
1600 | */ | |
1601 | static int nfs4_handle_reclaim_lease_error(struct nfs_client *clp, int status) | |
1602 | { | |
1603 | switch (status) { | |
89a21736 TM |
1604 | case -NFS4ERR_SEQ_MISORDERED: |
1605 | if (test_and_set_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) | |
1606 | return -ESERVERFAULT; | |
1607 | /* Lease confirmation error: retry after purging the lease */ | |
1608 | ssleep(1); | |
2a6ee6aa TM |
1609 | case -NFS4ERR_CLID_INUSE: |
1610 | case -NFS4ERR_STALE_CLIENTID: | |
1611 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); | |
1612 | break; | |
1613 | case -EACCES: | |
1614 | if (clp->cl_machine_cred == NULL) | |
1615 | return -EACCES; | |
1616 | /* Handle case where the user hasn't set up machine creds */ | |
1617 | nfs4_clear_machine_cred(clp); | |
1618 | case -NFS4ERR_DELAY: | |
1619 | case -ETIMEDOUT: | |
1620 | case -EAGAIN: | |
1621 | ssleep(1); | |
1622 | break; | |
1623 | ||
1624 | case -NFS4ERR_MINOR_VERS_MISMATCH: | |
1625 | if (clp->cl_cons_state == NFS_CS_SESSION_INITING) | |
1626 | nfs_mark_client_ready(clp, -EPROTONOSUPPORT); | |
cc0a9843 TM |
1627 | dprintk("%s: exit with error %d for server %s\n", |
1628 | __func__, -EPROTONOSUPPORT, clp->cl_hostname); | |
2a6ee6aa TM |
1629 | return -EPROTONOSUPPORT; |
1630 | case -EKEYEXPIRED: | |
1631 | nfs4_warn_keyexpired(clp->cl_hostname); | |
1632 | case -NFS4ERR_NOT_SAME: /* FixMe: implement recovery | |
1633 | * in nfs4_exchange_id */ | |
1634 | default: | |
cc0a9843 TM |
1635 | dprintk("%s: exit with error %d for server %s\n", __func__, |
1636 | status, clp->cl_hostname); | |
2a6ee6aa TM |
1637 | return status; |
1638 | } | |
1639 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
cc0a9843 TM |
1640 | dprintk("%s: handled error %d for server %s\n", __func__, status, |
1641 | clp->cl_hostname); | |
2a6ee6aa TM |
1642 | return 0; |
1643 | } | |
1644 | ||
02860014 TM |
1645 | static int nfs4_reclaim_lease(struct nfs_client *clp) |
1646 | { | |
1647 | struct rpc_cred *cred; | |
c48f4f35 TM |
1648 | const struct nfs4_state_recovery_ops *ops = |
1649 | clp->cl_mvops->reboot_recovery_ops; | |
2a6ee6aa | 1650 | int status; |
02860014 | 1651 | |
90a16617 | 1652 | cred = ops->get_clid_cred(clp); |
2a6ee6aa TM |
1653 | if (cred == NULL) |
1654 | return -ENOENT; | |
1655 | status = ops->establish_clid(clp, cred); | |
1656 | put_rpccred(cred); | |
1657 | if (status != 0) | |
1658 | return nfs4_handle_reclaim_lease_error(clp, status); | |
1659 | return 0; | |
02860014 TM |
1660 | } |
1661 | ||
76db6d95 | 1662 | #ifdef CONFIG_NFS_V4_1 |
9f594791 | 1663 | void nfs4_schedule_session_recovery(struct nfs4_session *session, int err) |
0400a6b0 | 1664 | { |
444f72fe TM |
1665 | struct nfs_client *clp = session->clp; |
1666 | ||
9f594791 TM |
1667 | switch (err) { |
1668 | default: | |
1669 | set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); | |
1670 | break; | |
1671 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
1672 | set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); | |
1673 | } | |
444f72fe | 1674 | nfs4_schedule_lease_recovery(clp); |
0400a6b0 | 1675 | } |
cbdabc7f | 1676 | EXPORT_SYMBOL_GPL(nfs4_schedule_session_recovery); |
0400a6b0 | 1677 | |
b9efa1b2 AA |
1678 | void nfs41_handle_recall_slot(struct nfs_client *clp) |
1679 | { | |
1680 | set_bit(NFS4CLNT_RECALL_SLOT, &clp->cl_state); | |
cc0a9843 TM |
1681 | dprintk("%s: scheduling slot recall for server %s\n", __func__, |
1682 | clp->cl_hostname); | |
0400a6b0 | 1683 | nfs4_schedule_state_manager(clp); |
b9efa1b2 AA |
1684 | } |
1685 | ||
0f79fd6f TM |
1686 | static void nfs4_reset_all_state(struct nfs_client *clp) |
1687 | { | |
1688 | if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) == 0) { | |
2c820d9a | 1689 | set_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state); |
be0bfed0 | 1690 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
0f79fd6f | 1691 | nfs4_state_start_reclaim_nograce(clp); |
cc0a9843 TM |
1692 | dprintk("%s: scheduling reset of all state for server %s!\n", |
1693 | __func__, clp->cl_hostname); | |
0400a6b0 | 1694 | nfs4_schedule_state_manager(clp); |
0f79fd6f TM |
1695 | } |
1696 | } | |
1697 | ||
1698 | static void nfs41_handle_server_reboot(struct nfs_client *clp) | |
1699 | { | |
1700 | if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) == 0) { | |
1701 | nfs4_state_start_reclaim_reboot(clp); | |
cc0a9843 TM |
1702 | dprintk("%s: server %s rebooted!\n", __func__, |
1703 | clp->cl_hostname); | |
0400a6b0 | 1704 | nfs4_schedule_state_manager(clp); |
0f79fd6f TM |
1705 | } |
1706 | } | |
1707 | ||
1708 | static void nfs41_handle_state_revoked(struct nfs_client *clp) | |
1709 | { | |
0f79fd6f | 1710 | nfs4_reset_all_state(clp); |
cc0a9843 | 1711 | dprintk("%s: state revoked on server %s\n", __func__, clp->cl_hostname); |
0f79fd6f TM |
1712 | } |
1713 | ||
1714 | static void nfs41_handle_recallable_state_revoked(struct nfs_client *clp) | |
1715 | { | |
1716 | /* This will need to handle layouts too */ | |
1717 | nfs_expire_all_delegations(clp); | |
cc0a9843 TM |
1718 | dprintk("%s: Recallable state revoked on server %s!\n", __func__, |
1719 | clp->cl_hostname); | |
0f79fd6f TM |
1720 | } |
1721 | ||
a9e64442 | 1722 | static void nfs41_handle_backchannel_fault(struct nfs_client *clp) |
0f79fd6f TM |
1723 | { |
1724 | nfs_expire_all_delegations(clp); | |
1725 | if (test_and_set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state) == 0) | |
0400a6b0 | 1726 | nfs4_schedule_state_manager(clp); |
cc0a9843 TM |
1727 | dprintk("%s: server %s declared a backchannel fault\n", __func__, |
1728 | clp->cl_hostname); | |
0f79fd6f TM |
1729 | } |
1730 | ||
a9e64442 WAA |
1731 | static void nfs41_handle_cb_path_down(struct nfs_client *clp) |
1732 | { | |
1733 | if (test_and_set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, | |
1734 | &clp->cl_state) == 0) | |
1735 | nfs4_schedule_state_manager(clp); | |
1736 | } | |
1737 | ||
0629e370 AB |
1738 | void nfs41_handle_sequence_flag_errors(struct nfs_client *clp, u32 flags) |
1739 | { | |
1740 | if (!flags) | |
1741 | return; | |
2c820d9a CL |
1742 | |
1743 | dprintk("%s: \"%s\" (client ID %llx) flags=0x%08x\n", | |
1744 | __func__, clp->cl_hostname, clp->cl_clientid, flags); | |
1745 | ||
111d489f | 1746 | if (flags & SEQ4_STATUS_RESTART_RECLAIM_NEEDED) |
0f79fd6f | 1747 | nfs41_handle_server_reboot(clp); |
111d489f | 1748 | if (flags & (SEQ4_STATUS_EXPIRED_ALL_STATE_REVOKED | |
0629e370 AB |
1749 | SEQ4_STATUS_EXPIRED_SOME_STATE_REVOKED | |
1750 | SEQ4_STATUS_ADMIN_STATE_REVOKED | | |
0f79fd6f TM |
1751 | SEQ4_STATUS_LEASE_MOVED)) |
1752 | nfs41_handle_state_revoked(clp); | |
111d489f | 1753 | if (flags & SEQ4_STATUS_RECALLABLE_STATE_REVOKED) |
0f79fd6f | 1754 | nfs41_handle_recallable_state_revoked(clp); |
a9e64442 WAA |
1755 | if (flags & SEQ4_STATUS_BACKCHANNEL_FAULT) |
1756 | nfs41_handle_backchannel_fault(clp); | |
1757 | else if (flags & (SEQ4_STATUS_CB_PATH_DOWN | | |
1758 | SEQ4_STATUS_CB_PATH_DOWN_SESSION)) | |
0f79fd6f | 1759 | nfs41_handle_cb_path_down(clp); |
0629e370 AB |
1760 | } |
1761 | ||
c3fad1b1 AA |
1762 | static int nfs4_reset_session(struct nfs_client *clp) |
1763 | { | |
848f5bda | 1764 | struct rpc_cred *cred; |
c3fad1b1 AA |
1765 | int status; |
1766 | ||
38045412 | 1767 | nfs4_begin_drain_session(clp); |
848f5bda TM |
1768 | cred = nfs4_get_exchange_id_cred(clp); |
1769 | status = nfs4_proc_destroy_session(clp->cl_session, cred); | |
c3fad1b1 AA |
1770 | if (status && status != -NFS4ERR_BADSESSION && |
1771 | status != -NFS4ERR_DEADSESSION) { | |
f455848a | 1772 | status = nfs4_recovery_handle_error(clp, status); |
c3fad1b1 AA |
1773 | goto out; |
1774 | } | |
1775 | ||
1776 | memset(clp->cl_session->sess_id.data, 0, NFS4_MAX_SESSIONID_LEN); | |
848f5bda | 1777 | status = nfs4_proc_create_session(clp, cred); |
41f54a55 | 1778 | if (status) { |
cc0a9843 TM |
1779 | dprintk("%s: session reset failed with status %d for server %s!\n", |
1780 | __func__, status, clp->cl_hostname); | |
f2c1b510 | 1781 | status = nfs4_handle_reclaim_lease_error(clp, status); |
41f54a55 AA |
1782 | goto out; |
1783 | } | |
bda197f5 | 1784 | nfs41_finish_session_reset(clp); |
cc0a9843 TM |
1785 | dprintk("%s: session reset was successful for server %s!\n", |
1786 | __func__, clp->cl_hostname); | |
41f54a55 | 1787 | out: |
848f5bda TM |
1788 | if (cred) |
1789 | put_rpccred(cred); | |
c3fad1b1 AA |
1790 | return status; |
1791 | } | |
76db6d95 | 1792 | |
b9efa1b2 AA |
1793 | static int nfs4_recall_slot(struct nfs_client *clp) |
1794 | { | |
1795 | struct nfs4_slot_table *fc_tbl = &clp->cl_session->fc_slot_table; | |
1796 | struct nfs4_channel_attrs *fc_attrs = &clp->cl_session->fc_attrs; | |
1797 | struct nfs4_slot *new, *old; | |
1798 | int i; | |
1799 | ||
1800 | nfs4_begin_drain_session(clp); | |
1801 | new = kmalloc(fc_tbl->target_max_slots * sizeof(struct nfs4_slot), | |
8535b2be | 1802 | GFP_NOFS); |
b9efa1b2 AA |
1803 | if (!new) |
1804 | return -ENOMEM; | |
1805 | ||
1806 | spin_lock(&fc_tbl->slot_tbl_lock); | |
1807 | for (i = 0; i < fc_tbl->target_max_slots; i++) | |
1808 | new[i].seq_nr = fc_tbl->slots[i].seq_nr; | |
1809 | old = fc_tbl->slots; | |
1810 | fc_tbl->slots = new; | |
1811 | fc_tbl->max_slots = fc_tbl->target_max_slots; | |
1812 | fc_tbl->target_max_slots = 0; | |
1813 | fc_attrs->max_reqs = fc_tbl->max_slots; | |
1814 | spin_unlock(&fc_tbl->slot_tbl_lock); | |
1815 | ||
1816 | kfree(old); | |
1817 | nfs4_end_drain_session(clp); | |
1818 | return 0; | |
1819 | } | |
1820 | ||
a9e64442 WAA |
1821 | static int nfs4_bind_conn_to_session(struct nfs_client *clp) |
1822 | { | |
2cf047c9 TM |
1823 | struct rpc_cred *cred; |
1824 | int ret; | |
1825 | ||
43ac544c | 1826 | nfs4_begin_drain_session(clp); |
2cf047c9 TM |
1827 | cred = nfs4_get_exchange_id_cred(clp); |
1828 | ret = nfs4_proc_bind_conn_to_session(clp, cred); | |
1829 | if (cred) | |
1830 | put_rpccred(cred); | |
43ac544c | 1831 | clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); |
bf674c82 TM |
1832 | switch (ret) { |
1833 | case 0: | |
cc0a9843 TM |
1834 | dprintk("%s: bind_conn_to_session was successful for server %s!\n", |
1835 | __func__, clp->cl_hostname); | |
bf674c82 TM |
1836 | break; |
1837 | case -NFS4ERR_DELAY: | |
1838 | ssleep(1); | |
1839 | set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); | |
1840 | break; | |
1841 | default: | |
1842 | return nfs4_recovery_handle_error(clp, ret); | |
1843 | } | |
1844 | return 0; | |
a9e64442 | 1845 | } |
76db6d95 | 1846 | #else /* CONFIG_NFS_V4_1 */ |
c3fad1b1 | 1847 | static int nfs4_reset_session(struct nfs_client *clp) { return 0; } |
5601a00d | 1848 | static int nfs4_end_drain_session(struct nfs_client *clp) { return 0; } |
b9efa1b2 | 1849 | static int nfs4_recall_slot(struct nfs_client *clp) { return 0; } |
a9e64442 WAA |
1850 | |
1851 | static int nfs4_bind_conn_to_session(struct nfs_client *clp) | |
1852 | { | |
1853 | return 0; | |
1854 | } | |
76db6d95 AA |
1855 | #endif /* CONFIG_NFS_V4_1 */ |
1856 | ||
e005e804 | 1857 | static void nfs4_state_manager(struct nfs_client *clp) |
02860014 | 1858 | { |
02860014 TM |
1859 | int status = 0; |
1860 | ||
02860014 | 1861 | /* Ensure exclusive access to NFSv4 state */ |
47c2199b | 1862 | do { |
2c820d9a | 1863 | if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) { |
2a6ee6aa TM |
1864 | status = nfs4_reclaim_lease(clp); |
1865 | if (status < 0) | |
1866 | goto out_error; | |
2c820d9a CL |
1867 | clear_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state); |
1868 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1869 | } | |
1870 | ||
b79a4a1b TM |
1871 | if (test_and_clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) { |
1872 | /* We're going to have to re-establish a clientid */ | |
1873 | status = nfs4_reclaim_lease(clp); | |
2a6ee6aa | 1874 | if (status < 0) |
b79a4a1b | 1875 | goto out_error; |
2a6ee6aa TM |
1876 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
1877 | continue; | |
e598d843 | 1878 | clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); |
78fe0f41 WAA |
1879 | |
1880 | if (test_and_clear_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, | |
1881 | &clp->cl_state)) | |
1882 | nfs4_state_start_reclaim_nograce(clp); | |
1883 | else | |
1884 | set_bit(NFS4CLNT_RECLAIM_REBOOT, | |
1885 | &clp->cl_state); | |
1886 | ||
974cec8c | 1887 | pnfs_destroy_all_layouts(clp); |
e598d843 TM |
1888 | } |
1889 | ||
1890 | if (test_and_clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state)) { | |
1891 | status = nfs4_check_lease(clp); | |
4f38e4aa TM |
1892 | if (status < 0) |
1893 | goto out_error; | |
b6d408ba | 1894 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
e598d843 | 1895 | continue; |
b79a4a1b | 1896 | } |
b6d408ba | 1897 | |
c3fad1b1 | 1898 | /* Initialize or reset the session */ |
6df08189 | 1899 | if (test_and_clear_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state) |
7111dc73 | 1900 | && nfs4_has_session(clp)) { |
4d643d1d | 1901 | status = nfs4_reset_session(clp); |
b6d408ba TM |
1902 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
1903 | continue; | |
1904 | if (status < 0) | |
76db6d95 | 1905 | goto out_error; |
76db6d95 | 1906 | } |
b6d408ba | 1907 | |
a9e64442 WAA |
1908 | /* Send BIND_CONN_TO_SESSION */ |
1909 | if (test_and_clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION, | |
1910 | &clp->cl_state) && nfs4_has_session(clp)) { | |
1911 | status = nfs4_bind_conn_to_session(clp); | |
1912 | if (status < 0) | |
1913 | goto out_error; | |
bf674c82 | 1914 | continue; |
a9e64442 WAA |
1915 | } |
1916 | ||
b79a4a1b | 1917 | /* First recover reboot state... */ |
e345e88a | 1918 | if (test_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) { |
591d71cb | 1919 | status = nfs4_do_reclaim(clp, |
c48f4f35 | 1920 | clp->cl_mvops->reboot_recovery_ops); |
b6d408ba | 1921 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) || |
6df08189 | 1922 | test_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state)) |
c3fad1b1 | 1923 | continue; |
b79a4a1b | 1924 | nfs4_state_end_reclaim_reboot(clp); |
b6d408ba TM |
1925 | if (test_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) |
1926 | continue; | |
1927 | if (status < 0) | |
1928 | goto out_error; | |
02860014 TM |
1929 | } |
1930 | ||
b79a4a1b TM |
1931 | /* Now recover expired state... */ |
1932 | if (test_and_clear_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) { | |
591d71cb | 1933 | status = nfs4_do_reclaim(clp, |
c48f4f35 | 1934 | clp->cl_mvops->nograce_recovery_ops); |
b6d408ba | 1935 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) || |
6df08189 | 1936 | test_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state) || |
b6d408ba TM |
1937 | test_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) |
1938 | continue; | |
1939 | if (status < 0) | |
b79a4a1b | 1940 | goto out_error; |
1da177e4 | 1941 | } |
707fb4b3 | 1942 | |
5601a00d | 1943 | nfs4_end_drain_session(clp); |
707fb4b3 TM |
1944 | if (test_and_clear_bit(NFS4CLNT_DELEGRETURN, &clp->cl_state)) { |
1945 | nfs_client_return_marked_delegations(clp); | |
1946 | continue; | |
1947 | } | |
b9efa1b2 AA |
1948 | /* Recall session slots */ |
1949 | if (test_and_clear_bit(NFS4CLNT_RECALL_SLOT, &clp->cl_state) | |
1950 | && nfs4_has_session(clp)) { | |
1951 | status = nfs4_recall_slot(clp); | |
1952 | if (status < 0) | |
1953 | goto out_error; | |
1954 | continue; | |
1955 | } | |
1956 | ||
e005e804 TM |
1957 | |
1958 | nfs4_clear_state_manager_bit(clp); | |
f3c76491 TM |
1959 | /* Did we race with an attempt to give us more work? */ |
1960 | if (clp->cl_state == 0) | |
1961 | break; | |
1962 | if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) != 0) | |
1963 | break; | |
47c2199b | 1964 | } while (atomic_read(&clp->cl_count) > 1); |
e005e804 | 1965 | return; |
1da177e4 | 1966 | out_error: |
9a3ba432 | 1967 | pr_warn_ratelimited("NFS: state manager failed on NFSv4 server %s" |
5d8515ca | 1968 | " with error %d\n", clp->cl_hostname, -status); |
5601a00d | 1969 | nfs4_end_drain_session(clp); |
e005e804 TM |
1970 | nfs4_clear_state_manager_bit(clp); |
1971 | } | |
1972 | ||
1973 | static int nfs4_run_state_manager(void *ptr) | |
1974 | { | |
1975 | struct nfs_client *clp = ptr; | |
1976 | ||
1977 | allow_signal(SIGKILL); | |
1978 | nfs4_state_manager(clp); | |
1979 | nfs_put_client(clp); | |
1980 | module_put_and_exit(0); | |
1981 | return 0; | |
1da177e4 LT |
1982 | } |
1983 | ||
1984 | /* | |
1985 | * Local variables: | |
1986 | * c-basic-offset: 8 | |
1987 | * End: | |
1988 | */ |