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); | |
1f7977c1 TM |
732 | } else |
733 | nfs4_do_close(state, gfp_mask, wait); | |
a49c3c77 TM |
734 | } |
735 | ||
643168c2 | 736 | void nfs4_close_state(struct nfs4_state *state, fmode_t fmode) |
a49c3c77 | 737 | { |
643168c2 | 738 | __nfs4_close(state, fmode, GFP_NOFS, 0); |
a49c3c77 TM |
739 | } |
740 | ||
643168c2 | 741 | void nfs4_close_sync(struct nfs4_state *state, fmode_t fmode) |
a49c3c77 | 742 | { |
643168c2 | 743 | __nfs4_close(state, fmode, GFP_KERNEL, 1); |
1da177e4 LT |
744 | } |
745 | ||
746 | /* | |
747 | * Search the state->lock_states for an existing lock_owner | |
748 | * that is compatible with current->files | |
749 | */ | |
750 | static struct nfs4_lock_state * | |
77041ed9 | 751 | __nfs4_find_lock_state(struct nfs4_state *state, fl_owner_t fl_owner, pid_t fl_pid, unsigned int type) |
1da177e4 LT |
752 | { |
753 | struct nfs4_lock_state *pos; | |
754 | list_for_each_entry(pos, &state->lock_states, ls_locks) { | |
77041ed9 | 755 | if (type != NFS4_ANY_LOCK_TYPE && pos->ls_owner.lo_type != type) |
1da177e4 | 756 | continue; |
77041ed9 TM |
757 | switch (pos->ls_owner.lo_type) { |
758 | case NFS4_POSIX_LOCK_TYPE: | |
759 | if (pos->ls_owner.lo_u.posix_owner != fl_owner) | |
760 | continue; | |
761 | break; | |
762 | case NFS4_FLOCK_LOCK_TYPE: | |
763 | if (pos->ls_owner.lo_u.flock_owner != fl_pid) | |
764 | continue; | |
765 | } | |
1da177e4 LT |
766 | atomic_inc(&pos->ls_count); |
767 | return pos; | |
768 | } | |
769 | return NULL; | |
770 | } | |
771 | ||
1da177e4 LT |
772 | /* |
773 | * Return a compatible lock_state. If no initialized lock_state structure | |
774 | * exists, return an uninitialized one. | |
775 | * | |
1da177e4 | 776 | */ |
77041ed9 | 777 | 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 |
778 | { |
779 | struct nfs4_lock_state *lsp; | |
24d292b8 | 780 | struct nfs_server *server = state->owner->so_server; |
1da177e4 | 781 | |
8535b2be | 782 | lsp = kzalloc(sizeof(*lsp), GFP_NOFS); |
1da177e4 LT |
783 | if (lsp == NULL) |
784 | return NULL; | |
7ba127ab | 785 | nfs4_init_seqid_counter(&lsp->ls_seqid); |
1da177e4 | 786 | atomic_set(&lsp->ls_count, 1); |
b64aec8d | 787 | lsp->ls_state = state; |
77041ed9 TM |
788 | lsp->ls_owner.lo_type = type; |
789 | switch (lsp->ls_owner.lo_type) { | |
790 | case NFS4_FLOCK_LOCK_TYPE: | |
791 | lsp->ls_owner.lo_u.flock_owner = fl_pid; | |
792 | break; | |
793 | case NFS4_POSIX_LOCK_TYPE: | |
794 | lsp->ls_owner.lo_u.posix_owner = fl_owner; | |
795 | break; | |
796 | default: | |
d2d7ce28 | 797 | goto out_free; |
77041ed9 | 798 | } |
48c22eb2 TM |
799 | lsp->ls_seqid.owner_id = ida_simple_get(&server->lockowner_id, 0, 0, GFP_NOFS); |
800 | if (lsp->ls_seqid.owner_id < 0) | |
d2d7ce28 | 801 | goto out_free; |
8d0a8a9d | 802 | INIT_LIST_HEAD(&lsp->ls_locks); |
1da177e4 | 803 | return lsp; |
d2d7ce28 TM |
804 | out_free: |
805 | kfree(lsp); | |
806 | return NULL; | |
1da177e4 LT |
807 | } |
808 | ||
5ae67c4f | 809 | void nfs4_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp) |
9f958ab8 | 810 | { |
48c22eb2 | 811 | ida_simple_remove(&server->lockowner_id, lsp->ls_seqid.owner_id); |
7ba127ab | 812 | nfs4_destroy_seqid_counter(&lsp->ls_seqid); |
9f958ab8 TM |
813 | kfree(lsp); |
814 | } | |
815 | ||
1da177e4 LT |
816 | /* |
817 | * Return a compatible lock_state. If no initialized lock_state structure | |
818 | * exists, return an uninitialized one. | |
819 | * | |
1da177e4 | 820 | */ |
77041ed9 | 821 | static struct nfs4_lock_state *nfs4_get_lock_state(struct nfs4_state *state, fl_owner_t owner, pid_t pid, unsigned int type) |
1da177e4 | 822 | { |
8d0a8a9d | 823 | struct nfs4_lock_state *lsp, *new = NULL; |
1da177e4 | 824 | |
8d0a8a9d TM |
825 | for(;;) { |
826 | spin_lock(&state->state_lock); | |
77041ed9 | 827 | lsp = __nfs4_find_lock_state(state, owner, pid, type); |
8d0a8a9d TM |
828 | if (lsp != NULL) |
829 | break; | |
830 | if (new != NULL) { | |
8d0a8a9d TM |
831 | list_add(&new->ls_locks, &state->lock_states); |
832 | set_bit(LK_STATE_IN_USE, &state->flags); | |
833 | lsp = new; | |
834 | new = NULL; | |
835 | break; | |
836 | } | |
837 | spin_unlock(&state->state_lock); | |
77041ed9 | 838 | new = nfs4_alloc_lock_state(state, owner, pid, type); |
8d0a8a9d TM |
839 | if (new == NULL) |
840 | return NULL; | |
841 | } | |
842 | spin_unlock(&state->state_lock); | |
9f958ab8 | 843 | if (new != NULL) |
5ae67c4f | 844 | nfs4_free_lock_state(state->owner->so_server, new); |
1da177e4 LT |
845 | return lsp; |
846 | } | |
847 | ||
848 | /* | |
8d0a8a9d TM |
849 | * Release reference to lock_state, and free it if we see that |
850 | * it is no longer in use | |
1da177e4 | 851 | */ |
faf5f49c | 852 | void nfs4_put_lock_state(struct nfs4_lock_state *lsp) |
1da177e4 | 853 | { |
8d0a8a9d | 854 | struct nfs4_state *state; |
1da177e4 | 855 | |
8d0a8a9d TM |
856 | if (lsp == NULL) |
857 | return; | |
858 | state = lsp->ls_state; | |
859 | if (!atomic_dec_and_lock(&lsp->ls_count, &state->state_lock)) | |
860 | return; | |
861 | list_del(&lsp->ls_locks); | |
862 | if (list_empty(&state->lock_states)) | |
863 | clear_bit(LK_STATE_IN_USE, &state->flags); | |
864 | spin_unlock(&state->state_lock); | |
795a88c9 | 865 | if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) { |
cf470c3e TM |
866 | if (nfs4_release_lockowner(lsp) == 0) |
867 | return; | |
868 | } | |
5ae67c4f | 869 | nfs4_free_lock_state(lsp->ls_state->owner->so_server, lsp); |
1da177e4 LT |
870 | } |
871 | ||
8d0a8a9d | 872 | static void nfs4_fl_copy_lock(struct file_lock *dst, struct file_lock *src) |
1da177e4 | 873 | { |
8d0a8a9d | 874 | struct nfs4_lock_state *lsp = src->fl_u.nfs4_fl.owner; |
1da177e4 | 875 | |
8d0a8a9d TM |
876 | dst->fl_u.nfs4_fl.owner = lsp; |
877 | atomic_inc(&lsp->ls_count); | |
878 | } | |
1da177e4 | 879 | |
8d0a8a9d | 880 | static void nfs4_fl_release_lock(struct file_lock *fl) |
1da177e4 | 881 | { |
8d0a8a9d | 882 | nfs4_put_lock_state(fl->fl_u.nfs4_fl.owner); |
1da177e4 LT |
883 | } |
884 | ||
6aed6285 | 885 | static const struct file_lock_operations nfs4_fl_lock_ops = { |
8d0a8a9d TM |
886 | .fl_copy_lock = nfs4_fl_copy_lock, |
887 | .fl_release_private = nfs4_fl_release_lock, | |
888 | }; | |
889 | ||
890 | int nfs4_set_lock_state(struct nfs4_state *state, struct file_lock *fl) | |
1da177e4 | 891 | { |
8d0a8a9d TM |
892 | struct nfs4_lock_state *lsp; |
893 | ||
894 | if (fl->fl_ops != NULL) | |
895 | return 0; | |
77041ed9 TM |
896 | if (fl->fl_flags & FL_POSIX) |
897 | lsp = nfs4_get_lock_state(state, fl->fl_owner, 0, NFS4_POSIX_LOCK_TYPE); | |
898 | else if (fl->fl_flags & FL_FLOCK) | |
17280175 TM |
899 | lsp = nfs4_get_lock_state(state, NULL, fl->fl_pid, |
900 | NFS4_FLOCK_LOCK_TYPE); | |
77041ed9 TM |
901 | else |
902 | return -EINVAL; | |
8d0a8a9d TM |
903 | if (lsp == NULL) |
904 | return -ENOMEM; | |
905 | fl->fl_u.nfs4_fl.owner = lsp; | |
906 | fl->fl_ops = &nfs4_fl_lock_ops; | |
907 | return 0; | |
1da177e4 LT |
908 | } |
909 | ||
4fc8796d | 910 | static bool nfs4_copy_lock_stateid(nfs4_stateid *dst, struct nfs4_state *state, |
2a369153 | 911 | const struct nfs_lockowner *lockowner) |
1da177e4 | 912 | { |
8d0a8a9d | 913 | struct nfs4_lock_state *lsp; |
2a369153 TM |
914 | fl_owner_t fl_owner; |
915 | pid_t fl_pid; | |
4fc8796d | 916 | bool ret = false; |
1da177e4 | 917 | |
2a369153 TM |
918 | |
919 | if (lockowner == NULL) | |
920 | goto out; | |
921 | ||
8d0a8a9d | 922 | if (test_bit(LK_STATE_IN_USE, &state->flags) == 0) |
4fc8796d | 923 | goto out; |
1da177e4 | 924 | |
2a369153 TM |
925 | fl_owner = lockowner->l_owner; |
926 | fl_pid = lockowner->l_pid; | |
8d0a8a9d | 927 | spin_lock(&state->state_lock); |
77041ed9 | 928 | lsp = __nfs4_find_lock_state(state, fl_owner, fl_pid, NFS4_ANY_LOCK_TYPE); |
795a88c9 | 929 | if (lsp != NULL && test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0) { |
f597c537 | 930 | nfs4_stateid_copy(dst, &lsp->ls_stateid); |
4fc8796d TM |
931 | ret = true; |
932 | } | |
8d0a8a9d | 933 | spin_unlock(&state->state_lock); |
1da177e4 | 934 | nfs4_put_lock_state(lsp); |
4fc8796d TM |
935 | out: |
936 | return ret; | |
937 | } | |
938 | ||
939 | static void nfs4_copy_open_stateid(nfs4_stateid *dst, struct nfs4_state *state) | |
940 | { | |
941 | int seq; | |
942 | ||
943 | do { | |
944 | seq = read_seqbegin(&state->seqlock); | |
945 | nfs4_stateid_copy(dst, &state->stateid); | |
946 | } while (read_seqretry(&state->seqlock, seq)); | |
947 | } | |
948 | ||
949 | /* | |
950 | * Byte-range lock aware utility to initialize the stateid of read/write | |
951 | * requests. | |
952 | */ | |
953 | void nfs4_select_rw_stateid(nfs4_stateid *dst, struct nfs4_state *state, | |
2a369153 | 954 | fmode_t fmode, const struct nfs_lockowner *lockowner) |
4fc8796d TM |
955 | { |
956 | if (nfs4_copy_delegation_stateid(dst, state->inode, fmode)) | |
957 | return; | |
2a369153 | 958 | if (nfs4_copy_lock_stateid(dst, state, lockowner)) |
4fc8796d TM |
959 | return; |
960 | nfs4_copy_open_stateid(dst, state); | |
1da177e4 LT |
961 | } |
962 | ||
8535b2be | 963 | struct nfs_seqid *nfs_alloc_seqid(struct nfs_seqid_counter *counter, gfp_t gfp_mask) |
cee54fc9 | 964 | { |
cee54fc9 TM |
965 | struct nfs_seqid *new; |
966 | ||
8535b2be | 967 | new = kmalloc(sizeof(*new), gfp_mask); |
cee54fc9 TM |
968 | if (new != NULL) { |
969 | new->sequence = counter; | |
2f74c0a0 | 970 | INIT_LIST_HEAD(&new->list); |
4601df20 | 971 | new->task = NULL; |
cee54fc9 TM |
972 | } |
973 | return new; | |
974 | } | |
975 | ||
72211dbe | 976 | void nfs_release_seqid(struct nfs_seqid *seqid) |
1da177e4 | 977 | { |
4601df20 | 978 | struct nfs_seqid_counter *sequence; |
cee54fc9 | 979 | |
4601df20 TM |
980 | if (list_empty(&seqid->list)) |
981 | return; | |
982 | sequence = seqid->sequence; | |
983 | spin_lock(&sequence->lock); | |
984 | list_del_init(&seqid->list); | |
985 | if (!list_empty(&sequence->list)) { | |
986 | struct nfs_seqid *next; | |
987 | ||
988 | next = list_first_entry(&sequence->list, | |
989 | struct nfs_seqid, list); | |
990 | rpc_wake_up_queued_task(&sequence->wait, next->task); | |
2f74c0a0 | 991 | } |
4601df20 | 992 | spin_unlock(&sequence->lock); |
72211dbe TM |
993 | } |
994 | ||
995 | void nfs_free_seqid(struct nfs_seqid *seqid) | |
996 | { | |
997 | nfs_release_seqid(seqid); | |
cee54fc9 | 998 | kfree(seqid); |
1da177e4 LT |
999 | } |
1000 | ||
1001 | /* | |
cee54fc9 TM |
1002 | * Increment the seqid if the OPEN/OPEN_DOWNGRADE/CLOSE succeeded, or |
1003 | * failed with a seqid incrementing error - | |
1004 | * see comments nfs_fs.h:seqid_mutating_error() | |
1005 | */ | |
88d90939 | 1006 | static void nfs_increment_seqid(int status, struct nfs_seqid *seqid) |
cee54fc9 | 1007 | { |
7ba127ab | 1008 | BUG_ON(list_first_entry(&seqid->sequence->list, struct nfs_seqid, list) != seqid); |
cee54fc9 TM |
1009 | switch (status) { |
1010 | case 0: | |
1011 | break; | |
1012 | case -NFS4ERR_BAD_SEQID: | |
6f43ddcc TM |
1013 | if (seqid->sequence->flags & NFS_SEQID_CONFIRMED) |
1014 | return; | |
9a3ba432 | 1015 | pr_warn_ratelimited("NFS: v4 server returned a bad" |
497799e7 DM |
1016 | " sequence-id error on an" |
1017 | " unconfirmed sequence %p!\n", | |
6f43ddcc | 1018 | seqid->sequence); |
cee54fc9 TM |
1019 | case -NFS4ERR_STALE_CLIENTID: |
1020 | case -NFS4ERR_STALE_STATEID: | |
1021 | case -NFS4ERR_BAD_STATEID: | |
1022 | case -NFS4ERR_BADXDR: | |
1023 | case -NFS4ERR_RESOURCE: | |
1024 | case -NFS4ERR_NOFILEHANDLE: | |
1025 | /* Non-seqid mutating errors */ | |
1026 | return; | |
1027 | }; | |
1028 | /* | |
1029 | * Note: no locking needed as we are guaranteed to be first | |
1030 | * on the sequence list | |
1031 | */ | |
1032 | seqid->sequence->counter++; | |
1033 | } | |
1034 | ||
1035 | void nfs_increment_open_seqid(int status, struct nfs_seqid *seqid) | |
1036 | { | |
34dc1ad7 BH |
1037 | struct nfs4_state_owner *sp = container_of(seqid->sequence, |
1038 | struct nfs4_state_owner, so_seqid); | |
1039 | struct nfs_server *server = sp->so_server; | |
1040 | ||
1041 | if (status == -NFS4ERR_BAD_SEQID) | |
1da177e4 | 1042 | nfs4_drop_state_owner(sp); |
34dc1ad7 BH |
1043 | if (!nfs4_has_session(server->nfs_client)) |
1044 | nfs_increment_seqid(status, seqid); | |
cee54fc9 TM |
1045 | } |
1046 | ||
1047 | /* | |
cee54fc9 TM |
1048 | * Increment the seqid if the LOCK/LOCKU succeeded, or |
1049 | * failed with a seqid incrementing error - | |
1050 | * see comments nfs_fs.h:seqid_mutating_error() | |
1051 | */ | |
1052 | void nfs_increment_lock_seqid(int status, struct nfs_seqid *seqid) | |
1053 | { | |
88d90939 | 1054 | nfs_increment_seqid(status, seqid); |
cee54fc9 TM |
1055 | } |
1056 | ||
1057 | int nfs_wait_on_sequence(struct nfs_seqid *seqid, struct rpc_task *task) | |
1058 | { | |
7ba127ab | 1059 | struct nfs_seqid_counter *sequence = seqid->sequence; |
cee54fc9 TM |
1060 | int status = 0; |
1061 | ||
1062 | spin_lock(&sequence->lock); | |
4601df20 | 1063 | seqid->task = task; |
2f74c0a0 TM |
1064 | if (list_empty(&seqid->list)) |
1065 | list_add_tail(&seqid->list, &sequence->list); | |
1066 | if (list_first_entry(&sequence->list, struct nfs_seqid, list) == seqid) | |
1067 | goto unlock; | |
5d00837b | 1068 | rpc_sleep_on(&sequence->wait, task, NULL); |
2f74c0a0 TM |
1069 | status = -EAGAIN; |
1070 | unlock: | |
cee54fc9 TM |
1071 | spin_unlock(&sequence->lock); |
1072 | return status; | |
1da177e4 LT |
1073 | } |
1074 | ||
e005e804 | 1075 | static int nfs4_run_state_manager(void *); |
1da177e4 | 1076 | |
e005e804 | 1077 | static void nfs4_clear_state_manager_bit(struct nfs_client *clp) |
433fbe4c TM |
1078 | { |
1079 | smp_mb__before_clear_bit(); | |
e005e804 | 1080 | clear_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state); |
433fbe4c | 1081 | smp_mb__after_clear_bit(); |
e005e804 | 1082 | wake_up_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING); |
433fbe4c TM |
1083 | rpc_wake_up(&clp->cl_rpcwaitq); |
1084 | } | |
1085 | ||
1da177e4 | 1086 | /* |
e005e804 | 1087 | * Schedule the nfs_client asynchronous state management routine |
1da177e4 | 1088 | */ |
b0d3ded1 | 1089 | void nfs4_schedule_state_manager(struct nfs_client *clp) |
1da177e4 | 1090 | { |
5043e900 | 1091 | struct task_struct *task; |
2446ab60 | 1092 | char buf[INET6_ADDRSTRLEN + sizeof("-manager") + 1]; |
1da177e4 | 1093 | |
e005e804 TM |
1094 | if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) != 0) |
1095 | return; | |
5043e900 TM |
1096 | __module_get(THIS_MODULE); |
1097 | atomic_inc(&clp->cl_count); | |
2446ab60 TM |
1098 | |
1099 | /* The rcu_read_lock() is not strictly necessary, as the state | |
1100 | * manager is the only thread that ever changes the rpc_xprt | |
1101 | * after it's initialized. At this point, we're single threaded. */ | |
1102 | rcu_read_lock(); | |
1103 | snprintf(buf, sizeof(buf), "%s-manager", | |
1104 | rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)); | |
1105 | rcu_read_unlock(); | |
1106 | task = kthread_run(nfs4_run_state_manager, clp, buf); | |
1107 | if (IS_ERR(task)) { | |
1108 | printk(KERN_ERR "%s: kthread_run: %ld\n", | |
1109 | __func__, PTR_ERR(task)); | |
1110 | nfs4_clear_state_manager_bit(clp); | |
1111 | nfs_put_client(clp); | |
1112 | module_put(THIS_MODULE); | |
1113 | } | |
1da177e4 LT |
1114 | } |
1115 | ||
1116 | /* | |
0400a6b0 | 1117 | * Schedule a lease recovery attempt |
1da177e4 | 1118 | */ |
0400a6b0 | 1119 | void nfs4_schedule_lease_recovery(struct nfs_client *clp) |
1da177e4 LT |
1120 | { |
1121 | if (!clp) | |
1122 | return; | |
e598d843 TM |
1123 | if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
1124 | set_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); | |
cc0a9843 TM |
1125 | dprintk("%s: scheduling lease recovery for server %s\n", __func__, |
1126 | clp->cl_hostname); | |
e005e804 | 1127 | nfs4_schedule_state_manager(clp); |
1da177e4 | 1128 | } |
9cb81968 | 1129 | EXPORT_SYMBOL_GPL(nfs4_schedule_lease_recovery); |
1da177e4 | 1130 | |
ad1e3968 TM |
1131 | /* |
1132 | * nfs40_handle_cb_pathdown - return all delegations after NFS4ERR_CB_PATH_DOWN | |
1133 | * @clp: client to process | |
1134 | * | |
1135 | * Set the NFS4CLNT_LEASE_EXPIRED state in order to force a | |
1136 | * resend of the SETCLIENTID and hence re-establish the | |
1137 | * callback channel. Then return all existing delegations. | |
1138 | */ | |
1139 | static void nfs40_handle_cb_pathdown(struct nfs_client *clp) | |
1140 | { | |
1141 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1142 | nfs_expire_all_delegations(clp); | |
cc0a9843 TM |
1143 | dprintk("%s: handling CB_PATHDOWN recovery for server %s\n", __func__, |
1144 | clp->cl_hostname); | |
ad1e3968 TM |
1145 | } |
1146 | ||
042b60be TM |
1147 | void nfs4_schedule_path_down_recovery(struct nfs_client *clp) |
1148 | { | |
ad1e3968 | 1149 | nfs40_handle_cb_pathdown(clp); |
042b60be TM |
1150 | nfs4_schedule_state_manager(clp); |
1151 | } | |
1152 | ||
f9feab1e | 1153 | static int nfs4_state_mark_reclaim_reboot(struct nfs_client *clp, struct nfs4_state *state) |
b79a4a1b TM |
1154 | { |
1155 | ||
1156 | set_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); | |
1157 | /* Don't recover state that expired before the reboot */ | |
1158 | if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) { | |
1159 | clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); | |
1160 | return 0; | |
1161 | } | |
7eff03ae | 1162 | set_bit(NFS_OWNER_RECLAIM_REBOOT, &state->owner->so_flags); |
b79a4a1b TM |
1163 | set_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state); |
1164 | return 1; | |
1165 | } | |
1166 | ||
f9feab1e | 1167 | static int nfs4_state_mark_reclaim_nograce(struct nfs_client *clp, struct nfs4_state *state) |
b79a4a1b TM |
1168 | { |
1169 | set_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags); | |
1170 | clear_bit(NFS_STATE_RECLAIM_REBOOT, &state->flags); | |
7eff03ae | 1171 | set_bit(NFS_OWNER_RECLAIM_NOGRACE, &state->owner->so_flags); |
b79a4a1b TM |
1172 | set_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state); |
1173 | return 1; | |
1174 | } | |
1175 | ||
0400a6b0 TM |
1176 | void nfs4_schedule_stateid_recovery(const struct nfs_server *server, struct nfs4_state *state) |
1177 | { | |
1178 | struct nfs_client *clp = server->nfs_client; | |
1179 | ||
1180 | nfs4_state_mark_reclaim_nograce(clp, state); | |
cc0a9843 TM |
1181 | dprintk("%s: scheduling stateid recovery for server %s\n", __func__, |
1182 | clp->cl_hostname); | |
0400a6b0 TM |
1183 | nfs4_schedule_state_manager(clp); |
1184 | } | |
9cb81968 | 1185 | EXPORT_SYMBOL_GPL(nfs4_schedule_stateid_recovery); |
0400a6b0 | 1186 | |
a1d0b5ee TM |
1187 | void nfs_inode_find_state_and_recover(struct inode *inode, |
1188 | const nfs4_stateid *stateid) | |
1189 | { | |
1190 | struct nfs_client *clp = NFS_SERVER(inode)->nfs_client; | |
1191 | struct nfs_inode *nfsi = NFS_I(inode); | |
1192 | struct nfs_open_context *ctx; | |
1193 | struct nfs4_state *state; | |
1194 | bool found = false; | |
1195 | ||
1196 | spin_lock(&inode->i_lock); | |
1197 | list_for_each_entry(ctx, &nfsi->open_files, list) { | |
1198 | state = ctx->state; | |
1199 | if (state == NULL) | |
1200 | continue; | |
1201 | if (!test_bit(NFS_DELEGATED_STATE, &state->flags)) | |
1202 | continue; | |
f597c537 | 1203 | if (!nfs4_stateid_match(&state->stateid, stateid)) |
a1d0b5ee TM |
1204 | continue; |
1205 | nfs4_state_mark_reclaim_nograce(clp, state); | |
1206 | found = true; | |
1207 | } | |
1208 | spin_unlock(&inode->i_lock); | |
1209 | if (found) | |
1210 | nfs4_schedule_state_manager(clp); | |
1211 | } | |
1212 | ||
1213 | ||
02860014 | 1214 | static int nfs4_reclaim_locks(struct nfs4_state *state, const struct nfs4_state_recovery_ops *ops) |
1da177e4 LT |
1215 | { |
1216 | struct inode *inode = state->inode; | |
19e03c57 | 1217 | struct nfs_inode *nfsi = NFS_I(inode); |
1da177e4 LT |
1218 | struct file_lock *fl; |
1219 | int status = 0; | |
1220 | ||
3f09df70 TM |
1221 | if (inode->i_flock == NULL) |
1222 | return 0; | |
1223 | ||
1224 | /* Guard against delegation returns and new lock/unlock calls */ | |
19e03c57 | 1225 | down_write(&nfsi->rwsem); |
3f09df70 | 1226 | /* Protect inode->i_flock using the BKL */ |
b89f4321 | 1227 | lock_flocks(); |
90dc7d27 | 1228 | for (fl = inode->i_flock; fl != NULL; fl = fl->fl_next) { |
43b2a33a | 1229 | if (!(fl->fl_flags & (FL_POSIX|FL_FLOCK))) |
1da177e4 | 1230 | continue; |
cd3758e3 | 1231 | if (nfs_file_open_context(fl->fl_file)->state != state) |
1da177e4 | 1232 | continue; |
b89f4321 | 1233 | unlock_flocks(); |
1da177e4 | 1234 | status = ops->recover_lock(state, fl); |
1da177e4 | 1235 | switch (status) { |
965b5d67 TM |
1236 | case 0: |
1237 | break; | |
1238 | case -ESTALE: | |
1239 | case -NFS4ERR_ADMIN_REVOKED: | |
1240 | case -NFS4ERR_STALE_STATEID: | |
1241 | case -NFS4ERR_BAD_STATEID: | |
1242 | case -NFS4ERR_EXPIRED: | |
1243 | case -NFS4ERR_NO_GRACE: | |
1244 | case -NFS4ERR_STALE_CLIENTID: | |
9c4c761a TM |
1245 | case -NFS4ERR_BADSESSION: |
1246 | case -NFS4ERR_BADSLOT: | |
1247 | case -NFS4ERR_BAD_HIGH_SLOT: | |
1248 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
965b5d67 | 1249 | goto out; |
1da177e4 | 1250 | default: |
a030889a WAA |
1251 | printk(KERN_ERR "NFS: %s: unhandled error %d. " |
1252 | "Zeroing state\n", __func__, status); | |
965b5d67 TM |
1253 | case -ENOMEM: |
1254 | case -NFS4ERR_DENIED: | |
1da177e4 LT |
1255 | case -NFS4ERR_RECLAIM_BAD: |
1256 | case -NFS4ERR_RECLAIM_CONFLICT: | |
43b2a33a | 1257 | /* kill_proc(fl->fl_pid, SIGLOST, 1); */ |
965b5d67 | 1258 | status = 0; |
1da177e4 | 1259 | } |
b89f4321 | 1260 | lock_flocks(); |
1da177e4 | 1261 | } |
b89f4321 | 1262 | unlock_flocks(); |
965b5d67 | 1263 | out: |
19e03c57 | 1264 | up_write(&nfsi->rwsem); |
1da177e4 LT |
1265 | return status; |
1266 | } | |
1267 | ||
02860014 | 1268 | static int nfs4_reclaim_open_state(struct nfs4_state_owner *sp, const struct nfs4_state_recovery_ops *ops) |
1da177e4 LT |
1269 | { |
1270 | struct nfs4_state *state; | |
1271 | struct nfs4_lock_state *lock; | |
1272 | int status = 0; | |
1273 | ||
1274 | /* Note: we rely on the sp->so_states list being ordered | |
1275 | * so that we always reclaim open(O_RDWR) and/or open(O_WRITE) | |
1276 | * states first. | |
1277 | * This is needed to ensure that the server won't give us any | |
1278 | * read delegations that we have to return if, say, we are | |
1279 | * recovering after a network partition or a reboot from a | |
1280 | * server that doesn't support a grace period. | |
1281 | */ | |
fe1d8195 TM |
1282 | restart: |
1283 | spin_lock(&sp->so_lock); | |
1da177e4 | 1284 | list_for_each_entry(state, &sp->so_states, open_states) { |
b79a4a1b TM |
1285 | if (!test_and_clear_bit(ops->state_flag_bit, &state->flags)) |
1286 | continue; | |
1da177e4 LT |
1287 | if (state->state == 0) |
1288 | continue; | |
fe1d8195 TM |
1289 | atomic_inc(&state->count); |
1290 | spin_unlock(&sp->so_lock); | |
1da177e4 | 1291 | status = ops->recover_open(sp, state); |
1da177e4 | 1292 | if (status >= 0) { |
02860014 TM |
1293 | status = nfs4_reclaim_locks(state, ops); |
1294 | if (status >= 0) { | |
4b44b40e | 1295 | spin_lock(&state->state_lock); |
02860014 | 1296 | list_for_each_entry(lock, &state->lock_states, ls_locks) { |
795a88c9 | 1297 | if (!test_bit(NFS_LOCK_INITIALIZED, &lock->ls_flags)) |
96dcadc2 WD |
1298 | pr_warn_ratelimited("NFS: " |
1299 | "%s: Lock reclaim " | |
a030889a | 1300 | "failed!\n", __func__); |
02860014 | 1301 | } |
4b44b40e | 1302 | spin_unlock(&state->state_lock); |
fe1d8195 TM |
1303 | nfs4_put_open_state(state); |
1304 | goto restart; | |
1da177e4 | 1305 | } |
1da177e4 LT |
1306 | } |
1307 | switch (status) { | |
1308 | default: | |
a030889a WAA |
1309 | printk(KERN_ERR "NFS: %s: unhandled error %d. " |
1310 | "Zeroing state\n", __func__, status); | |
1da177e4 | 1311 | case -ENOENT: |
965b5d67 | 1312 | case -ENOMEM: |
b79a4a1b | 1313 | case -ESTALE: |
1da177e4 LT |
1314 | /* |
1315 | * Open state on this file cannot be recovered | |
1316 | * All we can do is revert to using the zero stateid. | |
1317 | */ | |
2d2f24ad TM |
1318 | memset(&state->stateid, 0, |
1319 | sizeof(state->stateid)); | |
1da177e4 LT |
1320 | /* Mark the file as being 'closed' */ |
1321 | state->state = 0; | |
1322 | break; | |
168667c4 TM |
1323 | case -EKEYEXPIRED: |
1324 | /* | |
1325 | * User RPCSEC_GSS context has expired. | |
1326 | * We cannot recover this stateid now, so | |
1327 | * skip it and allow recovery thread to | |
1328 | * proceed. | |
1329 | */ | |
1330 | break; | |
965b5d67 TM |
1331 | case -NFS4ERR_ADMIN_REVOKED: |
1332 | case -NFS4ERR_STALE_STATEID: | |
1333 | case -NFS4ERR_BAD_STATEID: | |
b79a4a1b TM |
1334 | case -NFS4ERR_RECLAIM_BAD: |
1335 | case -NFS4ERR_RECLAIM_CONFLICT: | |
1f0e890d | 1336 | nfs4_state_mark_reclaim_nograce(sp->so_server->nfs_client, state); |
b79a4a1b | 1337 | break; |
1da177e4 LT |
1338 | case -NFS4ERR_EXPIRED: |
1339 | case -NFS4ERR_NO_GRACE: | |
1f0e890d | 1340 | nfs4_state_mark_reclaim_nograce(sp->so_server->nfs_client, state); |
1da177e4 | 1341 | case -NFS4ERR_STALE_CLIENTID: |
9c4c761a TM |
1342 | case -NFS4ERR_BADSESSION: |
1343 | case -NFS4ERR_BADSLOT: | |
1344 | case -NFS4ERR_BAD_HIGH_SLOT: | |
1345 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
1da177e4 LT |
1346 | goto out_err; |
1347 | } | |
fe1d8195 TM |
1348 | nfs4_put_open_state(state); |
1349 | goto restart; | |
1da177e4 | 1350 | } |
fe1d8195 | 1351 | spin_unlock(&sp->so_lock); |
1da177e4 LT |
1352 | return 0; |
1353 | out_err: | |
fe1d8195 | 1354 | nfs4_put_open_state(state); |
1da177e4 LT |
1355 | return status; |
1356 | } | |
1357 | ||
b79a4a1b TM |
1358 | static void nfs4_clear_open_state(struct nfs4_state *state) |
1359 | { | |
1360 | struct nfs4_lock_state *lock; | |
1361 | ||
1362 | clear_bit(NFS_DELEGATED_STATE, &state->flags); | |
1363 | clear_bit(NFS_O_RDONLY_STATE, &state->flags); | |
1364 | clear_bit(NFS_O_WRONLY_STATE, &state->flags); | |
1365 | clear_bit(NFS_O_RDWR_STATE, &state->flags); | |
4b44b40e | 1366 | spin_lock(&state->state_lock); |
b79a4a1b | 1367 | list_for_each_entry(lock, &state->lock_states, ls_locks) { |
b79a4a1b | 1368 | lock->ls_seqid.flags = 0; |
795a88c9 | 1369 | clear_bit(NFS_LOCK_INITIALIZED, &lock->ls_flags); |
b79a4a1b | 1370 | } |
4b44b40e | 1371 | spin_unlock(&state->state_lock); |
b79a4a1b TM |
1372 | } |
1373 | ||
24d292b8 CL |
1374 | static void nfs4_reset_seqids(struct nfs_server *server, |
1375 | int (*mark_reclaim)(struct nfs_client *clp, struct nfs4_state *state)) | |
cee54fc9 | 1376 | { |
24d292b8 | 1377 | struct nfs_client *clp = server->nfs_client; |
cee54fc9 | 1378 | struct nfs4_state_owner *sp; |
9f958ab8 | 1379 | struct rb_node *pos; |
cee54fc9 | 1380 | struct nfs4_state *state; |
cee54fc9 | 1381 | |
24d292b8 CL |
1382 | spin_lock(&clp->cl_lock); |
1383 | for (pos = rb_first(&server->state_owners); | |
1384 | pos != NULL; | |
1385 | pos = rb_next(pos)) { | |
1386 | sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); | |
cee54fc9 | 1387 | sp->so_seqid.flags = 0; |
ec073428 | 1388 | spin_lock(&sp->so_lock); |
cee54fc9 | 1389 | list_for_each_entry(state, &sp->so_states, open_states) { |
b79a4a1b TM |
1390 | if (mark_reclaim(clp, state)) |
1391 | nfs4_clear_open_state(state); | |
cee54fc9 | 1392 | } |
ec073428 | 1393 | spin_unlock(&sp->so_lock); |
cee54fc9 | 1394 | } |
24d292b8 CL |
1395 | spin_unlock(&clp->cl_lock); |
1396 | } | |
1397 | ||
1398 | static void nfs4_state_mark_reclaim_helper(struct nfs_client *clp, | |
1399 | int (*mark_reclaim)(struct nfs_client *clp, struct nfs4_state *state)) | |
1400 | { | |
1401 | struct nfs_server *server; | |
1402 | ||
1403 | rcu_read_lock(); | |
1404 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) | |
1405 | nfs4_reset_seqids(server, mark_reclaim); | |
1406 | rcu_read_unlock(); | |
cee54fc9 TM |
1407 | } |
1408 | ||
b79a4a1b TM |
1409 | static void nfs4_state_start_reclaim_reboot(struct nfs_client *clp) |
1410 | { | |
1411 | /* Mark all delegations for reclaim */ | |
1412 | nfs_delegation_mark_reclaim(clp); | |
1413 | nfs4_state_mark_reclaim_helper(clp, nfs4_state_mark_reclaim_reboot); | |
1414 | } | |
1415 | ||
fce5c838 RL |
1416 | static void nfs4_reclaim_complete(struct nfs_client *clp, |
1417 | const struct nfs4_state_recovery_ops *ops) | |
1418 | { | |
1419 | /* Notify the server we're done reclaiming our state */ | |
1420 | if (ops->reclaim_complete) | |
1421 | (void)ops->reclaim_complete(clp); | |
1422 | } | |
1423 | ||
24d292b8 | 1424 | static void nfs4_clear_reclaim_server(struct nfs_server *server) |
b79a4a1b | 1425 | { |
24d292b8 | 1426 | struct nfs_client *clp = server->nfs_client; |
b79a4a1b TM |
1427 | struct nfs4_state_owner *sp; |
1428 | struct rb_node *pos; | |
1429 | struct nfs4_state *state; | |
1430 | ||
24d292b8 CL |
1431 | spin_lock(&clp->cl_lock); |
1432 | for (pos = rb_first(&server->state_owners); | |
1433 | pos != NULL; | |
1434 | pos = rb_next(pos)) { | |
1435 | sp = rb_entry(pos, struct nfs4_state_owner, so_server_node); | |
b79a4a1b TM |
1436 | spin_lock(&sp->so_lock); |
1437 | list_for_each_entry(state, &sp->so_states, open_states) { | |
24d292b8 CL |
1438 | if (!test_and_clear_bit(NFS_STATE_RECLAIM_REBOOT, |
1439 | &state->flags)) | |
b79a4a1b TM |
1440 | continue; |
1441 | nfs4_state_mark_reclaim_nograce(clp, state); | |
1442 | } | |
1443 | spin_unlock(&sp->so_lock); | |
1444 | } | |
24d292b8 CL |
1445 | spin_unlock(&clp->cl_lock); |
1446 | } | |
1447 | ||
1448 | static int nfs4_state_clear_reclaim_reboot(struct nfs_client *clp) | |
1449 | { | |
1450 | struct nfs_server *server; | |
1451 | ||
1452 | if (!test_and_clear_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) | |
1453 | return 0; | |
1454 | ||
1455 | rcu_read_lock(); | |
1456 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) | |
1457 | nfs4_clear_reclaim_server(server); | |
1458 | rcu_read_unlock(); | |
b79a4a1b TM |
1459 | |
1460 | nfs_delegation_reap_unclaimed(clp); | |
6eaa6149 TM |
1461 | return 1; |
1462 | } | |
1463 | ||
1464 | static void nfs4_state_end_reclaim_reboot(struct nfs_client *clp) | |
1465 | { | |
1466 | if (!nfs4_state_clear_reclaim_reboot(clp)) | |
1467 | return; | |
1468 | nfs4_reclaim_complete(clp, clp->cl_mvops->reboot_recovery_ops); | |
b79a4a1b TM |
1469 | } |
1470 | ||
1471 | static void nfs_delegation_clear_all(struct nfs_client *clp) | |
1472 | { | |
1473 | nfs_delegation_mark_reclaim(clp); | |
1474 | nfs_delegation_reap_unclaimed(clp); | |
1475 | } | |
1476 | ||
1477 | static void nfs4_state_start_reclaim_nograce(struct nfs_client *clp) | |
1478 | { | |
1479 | nfs_delegation_clear_all(clp); | |
1480 | nfs4_state_mark_reclaim_helper(clp, nfs4_state_mark_reclaim_nograce); | |
1481 | } | |
1482 | ||
168667c4 TM |
1483 | static void nfs4_warn_keyexpired(const char *s) |
1484 | { | |
1485 | printk_ratelimited(KERN_WARNING "Error: state manager" | |
1486 | " encountered RPCSEC_GSS session" | |
1487 | " expired against NFSv4 server %s.\n", | |
1488 | s); | |
1489 | } | |
1490 | ||
4f7cdf18 | 1491 | static int nfs4_recovery_handle_error(struct nfs_client *clp, int error) |
e598d843 TM |
1492 | { |
1493 | switch (error) { | |
4f38e4aa TM |
1494 | case 0: |
1495 | break; | |
e598d843 | 1496 | case -NFS4ERR_CB_PATH_DOWN: |
ad1e3968 | 1497 | nfs40_handle_cb_pathdown(clp); |
4f38e4aa | 1498 | break; |
c8b7ae3d TM |
1499 | case -NFS4ERR_NO_GRACE: |
1500 | nfs4_state_end_reclaim_reboot(clp); | |
4f38e4aa | 1501 | break; |
e598d843 TM |
1502 | case -NFS4ERR_STALE_CLIENTID: |
1503 | case -NFS4ERR_LEASE_MOVED: | |
1504 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
6eaa6149 | 1505 | nfs4_state_clear_reclaim_reboot(clp); |
e598d843 TM |
1506 | nfs4_state_start_reclaim_reboot(clp); |
1507 | break; | |
1508 | case -NFS4ERR_EXPIRED: | |
1509 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1510 | nfs4_state_start_reclaim_nograce(clp); | |
8ba9bf8e | 1511 | break; |
c3fad1b1 AA |
1512 | case -NFS4ERR_BADSESSION: |
1513 | case -NFS4ERR_BADSLOT: | |
1514 | case -NFS4ERR_BAD_HIGH_SLOT: | |
1515 | case -NFS4ERR_DEADSESSION: | |
c3fad1b1 AA |
1516 | case -NFS4ERR_SEQ_FALSE_RETRY: |
1517 | case -NFS4ERR_SEQ_MISORDERED: | |
6df08189 | 1518 | set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); |
0b9e2d41 | 1519 | /* Zero session reset errors */ |
4f38e4aa | 1520 | break; |
7c5d7256 TM |
1521 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: |
1522 | set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); | |
1523 | break; | |
168667c4 TM |
1524 | case -EKEYEXPIRED: |
1525 | /* Nothing we can do */ | |
1526 | nfs4_warn_keyexpired(clp->cl_hostname); | |
4f38e4aa TM |
1527 | break; |
1528 | default: | |
cc0a9843 TM |
1529 | dprintk("%s: failed to handle error %d for server %s\n", |
1530 | __func__, error, clp->cl_hostname); | |
4f38e4aa | 1531 | return error; |
e598d843 | 1532 | } |
cc0a9843 TM |
1533 | dprintk("%s: handled error %d for server %s\n", __func__, error, |
1534 | clp->cl_hostname); | |
4f38e4aa | 1535 | return 0; |
e598d843 TM |
1536 | } |
1537 | ||
02860014 | 1538 | static int nfs4_do_reclaim(struct nfs_client *clp, const struct nfs4_state_recovery_ops *ops) |
1da177e4 | 1539 | { |
24d292b8 CL |
1540 | struct nfs4_state_owner *sp; |
1541 | struct nfs_server *server; | |
9f958ab8 | 1542 | struct rb_node *pos; |
1da177e4 LT |
1543 | int status = 0; |
1544 | ||
7eff03ae | 1545 | restart: |
24d292b8 CL |
1546 | rcu_read_lock(); |
1547 | list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) { | |
0aaaf5c4 | 1548 | nfs4_purge_state_owners(server); |
24d292b8 CL |
1549 | spin_lock(&clp->cl_lock); |
1550 | for (pos = rb_first(&server->state_owners); | |
1551 | pos != NULL; | |
1552 | pos = rb_next(pos)) { | |
1553 | sp = rb_entry(pos, | |
1554 | struct nfs4_state_owner, so_server_node); | |
1555 | if (!test_and_clear_bit(ops->owner_flag_bit, | |
1556 | &sp->so_flags)) | |
1557 | continue; | |
1558 | atomic_inc(&sp->so_count); | |
1559 | spin_unlock(&clp->cl_lock); | |
1560 | rcu_read_unlock(); | |
1561 | ||
1562 | status = nfs4_reclaim_open_state(sp, ops); | |
1563 | if (status < 0) { | |
1564 | set_bit(ops->owner_flag_bit, &sp->so_flags); | |
1565 | nfs4_put_state_owner(sp); | |
1566 | return nfs4_recovery_handle_error(clp, status); | |
1567 | } | |
1568 | ||
7eff03ae | 1569 | nfs4_put_state_owner(sp); |
24d292b8 | 1570 | goto restart; |
7eff03ae | 1571 | } |
24d292b8 | 1572 | spin_unlock(&clp->cl_lock); |
02860014 | 1573 | } |
24d292b8 | 1574 | rcu_read_unlock(); |
02860014 TM |
1575 | return status; |
1576 | } | |
1577 | ||
1578 | static int nfs4_check_lease(struct nfs_client *clp) | |
1579 | { | |
1580 | struct rpc_cred *cred; | |
c48f4f35 TM |
1581 | const struct nfs4_state_maintenance_ops *ops = |
1582 | clp->cl_mvops->state_renewal_ops; | |
4f38e4aa | 1583 | int status; |
1da177e4 | 1584 | |
0f605b56 TM |
1585 | /* Is the client already known to have an expired lease? */ |
1586 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) | |
1587 | return 0; | |
a7b72103 AA |
1588 | spin_lock(&clp->cl_lock); |
1589 | cred = ops->get_state_renewal_cred_locked(clp); | |
1590 | spin_unlock(&clp->cl_lock); | |
0f605b56 TM |
1591 | if (cred == NULL) { |
1592 | cred = nfs4_get_setclientid_cred(clp); | |
4f38e4aa | 1593 | status = -ENOKEY; |
0f605b56 TM |
1594 | if (cred == NULL) |
1595 | goto out; | |
286d7d6a | 1596 | } |
8e69514f | 1597 | status = ops->renew_lease(clp, cred); |
0f605b56 TM |
1598 | put_rpccred(cred); |
1599 | out: | |
4f7cdf18 | 1600 | return nfs4_recovery_handle_error(clp, status); |
02860014 TM |
1601 | } |
1602 | ||
2a6ee6aa TM |
1603 | /* Set NFS4CLNT_LEASE_EXPIRED for all v4.0 errors and for recoverable errors |
1604 | * on EXCHANGE_ID for v4.1 | |
1605 | */ | |
1606 | static int nfs4_handle_reclaim_lease_error(struct nfs_client *clp, int status) | |
1607 | { | |
1608 | switch (status) { | |
89a21736 TM |
1609 | case -NFS4ERR_SEQ_MISORDERED: |
1610 | if (test_and_set_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) | |
1611 | return -ESERVERFAULT; | |
1612 | /* Lease confirmation error: retry after purging the lease */ | |
1613 | ssleep(1); | |
2a6ee6aa TM |
1614 | case -NFS4ERR_STALE_CLIENTID: |
1615 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); | |
1616 | break; | |
de734831 CL |
1617 | case -NFS4ERR_CLID_INUSE: |
1618 | pr_err("NFS: Server %s reports our clientid is in use\n", | |
1619 | clp->cl_hostname); | |
1620 | nfs_mark_client_ready(clp, -EPERM); | |
1621 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); | |
1622 | return -EPERM; | |
2a6ee6aa TM |
1623 | case -EACCES: |
1624 | if (clp->cl_machine_cred == NULL) | |
1625 | return -EACCES; | |
1626 | /* Handle case where the user hasn't set up machine creds */ | |
1627 | nfs4_clear_machine_cred(clp); | |
1628 | case -NFS4ERR_DELAY: | |
1629 | case -ETIMEDOUT: | |
1630 | case -EAGAIN: | |
1631 | ssleep(1); | |
1632 | break; | |
1633 | ||
1634 | case -NFS4ERR_MINOR_VERS_MISMATCH: | |
1635 | if (clp->cl_cons_state == NFS_CS_SESSION_INITING) | |
1636 | nfs_mark_client_ready(clp, -EPROTONOSUPPORT); | |
cc0a9843 TM |
1637 | dprintk("%s: exit with error %d for server %s\n", |
1638 | __func__, -EPROTONOSUPPORT, clp->cl_hostname); | |
2a6ee6aa TM |
1639 | return -EPROTONOSUPPORT; |
1640 | case -EKEYEXPIRED: | |
1641 | nfs4_warn_keyexpired(clp->cl_hostname); | |
1642 | case -NFS4ERR_NOT_SAME: /* FixMe: implement recovery | |
1643 | * in nfs4_exchange_id */ | |
1644 | default: | |
cc0a9843 TM |
1645 | dprintk("%s: exit with error %d for server %s\n", __func__, |
1646 | status, clp->cl_hostname); | |
2a6ee6aa TM |
1647 | return status; |
1648 | } | |
1649 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
cc0a9843 TM |
1650 | dprintk("%s: handled error %d for server %s\n", __func__, status, |
1651 | clp->cl_hostname); | |
2a6ee6aa TM |
1652 | return 0; |
1653 | } | |
1654 | ||
b42353ff | 1655 | static int nfs4_establish_lease(struct nfs_client *clp) |
02860014 TM |
1656 | { |
1657 | struct rpc_cred *cred; | |
c48f4f35 TM |
1658 | const struct nfs4_state_recovery_ops *ops = |
1659 | clp->cl_mvops->reboot_recovery_ops; | |
2a6ee6aa | 1660 | int status; |
02860014 | 1661 | |
90a16617 | 1662 | cred = ops->get_clid_cred(clp); |
2a6ee6aa TM |
1663 | if (cred == NULL) |
1664 | return -ENOENT; | |
1665 | status = ops->establish_clid(clp, cred); | |
1666 | put_rpccred(cred); | |
1667 | if (status != 0) | |
b42353ff TM |
1668 | return status; |
1669 | pnfs_destroy_all_layouts(clp); | |
1670 | return 0; | |
1671 | } | |
1672 | ||
6bbb4ae8 CL |
1673 | /* |
1674 | * Returns zero or a negative errno. NFS4ERR values are converted | |
1675 | * to local errno values. | |
1676 | */ | |
b42353ff TM |
1677 | static int nfs4_reclaim_lease(struct nfs_client *clp) |
1678 | { | |
1679 | int status; | |
1680 | ||
1681 | status = nfs4_establish_lease(clp); | |
1682 | if (status < 0) | |
1683 | return nfs4_handle_reclaim_lease_error(clp, status); | |
1684 | if (test_and_clear_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state)) | |
1685 | nfs4_state_start_reclaim_nograce(clp); | |
1686 | if (!test_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) | |
1687 | set_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state); | |
1688 | clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state); | |
1689 | clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1690 | return 0; | |
1691 | } | |
1692 | ||
1693 | static int nfs4_purge_lease(struct nfs_client *clp) | |
1694 | { | |
1695 | int status; | |
1696 | ||
1697 | status = nfs4_establish_lease(clp); | |
1698 | if (status < 0) | |
2a6ee6aa | 1699 | return nfs4_handle_reclaim_lease_error(clp, status); |
b42353ff TM |
1700 | clear_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state); |
1701 | set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state); | |
1702 | nfs4_state_start_reclaim_nograce(clp); | |
2a6ee6aa | 1703 | return 0; |
02860014 TM |
1704 | } |
1705 | ||
76db6d95 | 1706 | #ifdef CONFIG_NFS_V4_1 |
9f594791 | 1707 | void nfs4_schedule_session_recovery(struct nfs4_session *session, int err) |
0400a6b0 | 1708 | { |
444f72fe TM |
1709 | struct nfs_client *clp = session->clp; |
1710 | ||
9f594791 TM |
1711 | switch (err) { |
1712 | default: | |
1713 | set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state); | |
1714 | break; | |
1715 | case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: | |
1716 | set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); | |
1717 | } | |
444f72fe | 1718 | nfs4_schedule_lease_recovery(clp); |
0400a6b0 | 1719 | } |
cbdabc7f | 1720 | EXPORT_SYMBOL_GPL(nfs4_schedule_session_recovery); |
0400a6b0 | 1721 | |
b9efa1b2 AA |
1722 | void nfs41_handle_recall_slot(struct nfs_client *clp) |
1723 | { | |
1724 | set_bit(NFS4CLNT_RECALL_SLOT, &clp->cl_state); | |
cc0a9843 TM |
1725 | dprintk("%s: scheduling slot recall for server %s\n", __func__, |
1726 | clp->cl_hostname); | |
0400a6b0 | 1727 | nfs4_schedule_state_manager(clp); |
b9efa1b2 AA |
1728 | } |
1729 | ||
0f79fd6f TM |
1730 | static void nfs4_reset_all_state(struct nfs_client *clp) |
1731 | { | |
1732 | if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) == 0) { | |
2c820d9a | 1733 | set_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state); |
be0bfed0 | 1734 | clear_bit(NFS4CLNT_LEASE_CONFIRM, &clp->cl_state); |
0f79fd6f | 1735 | nfs4_state_start_reclaim_nograce(clp); |
cc0a9843 TM |
1736 | dprintk("%s: scheduling reset of all state for server %s!\n", |
1737 | __func__, clp->cl_hostname); | |
0400a6b0 | 1738 | nfs4_schedule_state_manager(clp); |
0f79fd6f TM |
1739 | } |
1740 | } | |
1741 | ||
1742 | static void nfs41_handle_server_reboot(struct nfs_client *clp) | |
1743 | { | |
1744 | if (test_and_set_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) == 0) { | |
1745 | nfs4_state_start_reclaim_reboot(clp); | |
cc0a9843 TM |
1746 | dprintk("%s: server %s rebooted!\n", __func__, |
1747 | clp->cl_hostname); | |
0400a6b0 | 1748 | nfs4_schedule_state_manager(clp); |
0f79fd6f TM |
1749 | } |
1750 | } | |
1751 | ||
1752 | static void nfs41_handle_state_revoked(struct nfs_client *clp) | |
1753 | { | |
0f79fd6f | 1754 | nfs4_reset_all_state(clp); |
cc0a9843 | 1755 | dprintk("%s: state revoked on server %s\n", __func__, clp->cl_hostname); |
0f79fd6f TM |
1756 | } |
1757 | ||
1758 | static void nfs41_handle_recallable_state_revoked(struct nfs_client *clp) | |
1759 | { | |
1760 | /* This will need to handle layouts too */ | |
1761 | nfs_expire_all_delegations(clp); | |
cc0a9843 TM |
1762 | dprintk("%s: Recallable state revoked on server %s!\n", __func__, |
1763 | clp->cl_hostname); | |
0f79fd6f TM |
1764 | } |
1765 | ||
a9e64442 | 1766 | static void nfs41_handle_backchannel_fault(struct nfs_client *clp) |
0f79fd6f TM |
1767 | { |
1768 | nfs_expire_all_delegations(clp); | |
1769 | if (test_and_set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state) == 0) | |
0400a6b0 | 1770 | nfs4_schedule_state_manager(clp); |
cc0a9843 TM |
1771 | dprintk("%s: server %s declared a backchannel fault\n", __func__, |
1772 | clp->cl_hostname); | |
0f79fd6f TM |
1773 | } |
1774 | ||
a9e64442 WAA |
1775 | static void nfs41_handle_cb_path_down(struct nfs_client *clp) |
1776 | { | |
1777 | if (test_and_set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, | |
1778 | &clp->cl_state) == 0) | |
1779 | nfs4_schedule_state_manager(clp); | |
1780 | } | |
1781 | ||
0629e370 AB |
1782 | void nfs41_handle_sequence_flag_errors(struct nfs_client *clp, u32 flags) |
1783 | { | |
1784 | if (!flags) | |
1785 | return; | |
2c820d9a CL |
1786 | |
1787 | dprintk("%s: \"%s\" (client ID %llx) flags=0x%08x\n", | |
1788 | __func__, clp->cl_hostname, clp->cl_clientid, flags); | |
1789 | ||
111d489f | 1790 | if (flags & SEQ4_STATUS_RESTART_RECLAIM_NEEDED) |
0f79fd6f | 1791 | nfs41_handle_server_reboot(clp); |
111d489f | 1792 | if (flags & (SEQ4_STATUS_EXPIRED_ALL_STATE_REVOKED | |
0629e370 AB |
1793 | SEQ4_STATUS_EXPIRED_SOME_STATE_REVOKED | |
1794 | SEQ4_STATUS_ADMIN_STATE_REVOKED | | |
0f79fd6f TM |
1795 | SEQ4_STATUS_LEASE_MOVED)) |
1796 | nfs41_handle_state_revoked(clp); | |
111d489f | 1797 | if (flags & SEQ4_STATUS_RECALLABLE_STATE_REVOKED) |
0f79fd6f | 1798 | nfs41_handle_recallable_state_revoked(clp); |
a9e64442 WAA |
1799 | if (flags & SEQ4_STATUS_BACKCHANNEL_FAULT) |
1800 | nfs41_handle_backchannel_fault(clp); | |
1801 | else if (flags & (SEQ4_STATUS_CB_PATH_DOWN | | |
1802 | SEQ4_STATUS_CB_PATH_DOWN_SESSION)) | |
0f79fd6f | 1803 | nfs41_handle_cb_path_down(clp); |
0629e370 AB |
1804 | } |
1805 | ||
c3fad1b1 AA |
1806 | static int nfs4_reset_session(struct nfs_client *clp) |
1807 | { | |
848f5bda | 1808 | struct rpc_cred *cred; |
c3fad1b1 AA |
1809 | int status; |
1810 | ||
1a47e7a6 TM |
1811 | if (!nfs4_has_session(clp)) |
1812 | return 0; | |
38045412 | 1813 | nfs4_begin_drain_session(clp); |
848f5bda TM |
1814 | cred = nfs4_get_exchange_id_cred(clp); |
1815 | status = nfs4_proc_destroy_session(clp->cl_session, cred); | |
c3fad1b1 AA |
1816 | if (status && status != -NFS4ERR_BADSESSION && |
1817 | status != -NFS4ERR_DEADSESSION) { | |
f455848a | 1818 | status = nfs4_recovery_handle_error(clp, status); |
c3fad1b1 AA |
1819 | goto out; |
1820 | } | |
1821 | ||
1822 | memset(clp->cl_session->sess_id.data, 0, NFS4_MAX_SESSIONID_LEN); | |
848f5bda | 1823 | status = nfs4_proc_create_session(clp, cred); |
41f54a55 | 1824 | if (status) { |
cc0a9843 TM |
1825 | dprintk("%s: session reset failed with status %d for server %s!\n", |
1826 | __func__, status, clp->cl_hostname); | |
f2c1b510 | 1827 | status = nfs4_handle_reclaim_lease_error(clp, status); |
41f54a55 AA |
1828 | goto out; |
1829 | } | |
bda197f5 | 1830 | nfs41_finish_session_reset(clp); |
cc0a9843 TM |
1831 | dprintk("%s: session reset was successful for server %s!\n", |
1832 | __func__, clp->cl_hostname); | |
41f54a55 | 1833 | out: |
848f5bda TM |
1834 | if (cred) |
1835 | put_rpccred(cred); | |
c3fad1b1 AA |
1836 | return status; |
1837 | } | |
76db6d95 | 1838 | |
b9efa1b2 AA |
1839 | static int nfs4_recall_slot(struct nfs_client *clp) |
1840 | { | |
60f00153 | 1841 | struct nfs4_slot_table *fc_tbl; |
b9efa1b2 AA |
1842 | struct nfs4_slot *new, *old; |
1843 | int i; | |
1844 | ||
60f00153 TM |
1845 | if (!nfs4_has_session(clp)) |
1846 | return 0; | |
b9efa1b2 | 1847 | nfs4_begin_drain_session(clp); |
60f00153 | 1848 | fc_tbl = &clp->cl_session->fc_slot_table; |
b9efa1b2 | 1849 | new = kmalloc(fc_tbl->target_max_slots * sizeof(struct nfs4_slot), |
8535b2be | 1850 | GFP_NOFS); |
b9efa1b2 AA |
1851 | if (!new) |
1852 | return -ENOMEM; | |
1853 | ||
1854 | spin_lock(&fc_tbl->slot_tbl_lock); | |
1855 | for (i = 0; i < fc_tbl->target_max_slots; i++) | |
1856 | new[i].seq_nr = fc_tbl->slots[i].seq_nr; | |
1857 | old = fc_tbl->slots; | |
1858 | fc_tbl->slots = new; | |
1859 | fc_tbl->max_slots = fc_tbl->target_max_slots; | |
1860 | fc_tbl->target_max_slots = 0; | |
60f00153 | 1861 | clp->cl_session->fc_attrs.max_reqs = fc_tbl->max_slots; |
b9efa1b2 AA |
1862 | spin_unlock(&fc_tbl->slot_tbl_lock); |
1863 | ||
1864 | kfree(old); | |
b9efa1b2 AA |
1865 | return 0; |
1866 | } | |
1867 | ||
a9e64442 WAA |
1868 | static int nfs4_bind_conn_to_session(struct nfs_client *clp) |
1869 | { | |
2cf047c9 TM |
1870 | struct rpc_cred *cred; |
1871 | int ret; | |
1872 | ||
1a47e7a6 TM |
1873 | if (!nfs4_has_session(clp)) |
1874 | return 0; | |
43ac544c | 1875 | nfs4_begin_drain_session(clp); |
2cf047c9 TM |
1876 | cred = nfs4_get_exchange_id_cred(clp); |
1877 | ret = nfs4_proc_bind_conn_to_session(clp, cred); | |
1878 | if (cred) | |
1879 | put_rpccred(cred); | |
43ac544c | 1880 | clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); |
bf674c82 TM |
1881 | switch (ret) { |
1882 | case 0: | |
cc0a9843 TM |
1883 | dprintk("%s: bind_conn_to_session was successful for server %s!\n", |
1884 | __func__, clp->cl_hostname); | |
bf674c82 TM |
1885 | break; |
1886 | case -NFS4ERR_DELAY: | |
1887 | ssleep(1); | |
1888 | set_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state); | |
1889 | break; | |
1890 | default: | |
1891 | return nfs4_recovery_handle_error(clp, ret); | |
1892 | } | |
1893 | return 0; | |
a9e64442 | 1894 | } |
76db6d95 | 1895 | #else /* CONFIG_NFS_V4_1 */ |
c3fad1b1 | 1896 | static int nfs4_reset_session(struct nfs_client *clp) { return 0; } |
5601a00d | 1897 | static int nfs4_end_drain_session(struct nfs_client *clp) { return 0; } |
b9efa1b2 | 1898 | static int nfs4_recall_slot(struct nfs_client *clp) { return 0; } |
a9e64442 WAA |
1899 | |
1900 | static int nfs4_bind_conn_to_session(struct nfs_client *clp) | |
1901 | { | |
1902 | return 0; | |
1903 | } | |
76db6d95 AA |
1904 | #endif /* CONFIG_NFS_V4_1 */ |
1905 | ||
e005e804 | 1906 | static void nfs4_state_manager(struct nfs_client *clp) |
02860014 | 1907 | { |
02860014 | 1908 | int status = 0; |
8ed27d4f | 1909 | const char *section = "", *section_sep = ""; |
02860014 | 1910 | |
02860014 | 1911 | /* Ensure exclusive access to NFSv4 state */ |
47c2199b | 1912 | do { |
2c820d9a | 1913 | if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) { |
8ed27d4f | 1914 | section = "purge state"; |
b42353ff | 1915 | status = nfs4_purge_lease(clp); |
2a6ee6aa TM |
1916 | if (status < 0) |
1917 | goto out_error; | |
b42353ff | 1918 | continue; |
2c820d9a CL |
1919 | } |
1920 | ||
b42353ff | 1921 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) { |
8ed27d4f | 1922 | section = "lease expired"; |
b79a4a1b TM |
1923 | /* We're going to have to re-establish a clientid */ |
1924 | status = nfs4_reclaim_lease(clp); | |
2a6ee6aa | 1925 | if (status < 0) |
b79a4a1b | 1926 | goto out_error; |
b42353ff | 1927 | continue; |
e598d843 TM |
1928 | } |
1929 | ||
1930 | if (test_and_clear_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state)) { | |
8ed27d4f | 1931 | section = "check lease"; |
e598d843 | 1932 | status = nfs4_check_lease(clp); |
4f38e4aa TM |
1933 | if (status < 0) |
1934 | goto out_error; | |
b6d408ba | 1935 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
e598d843 | 1936 | continue; |
b79a4a1b | 1937 | } |
b6d408ba | 1938 | |
c3fad1b1 | 1939 | /* Initialize or reset the session */ |
1a47e7a6 | 1940 | if (test_and_clear_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state)) { |
8ed27d4f | 1941 | section = "reset session"; |
4d643d1d | 1942 | status = nfs4_reset_session(clp); |
b6d408ba TM |
1943 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state)) |
1944 | continue; | |
1945 | if (status < 0) | |
76db6d95 | 1946 | goto out_error; |
76db6d95 | 1947 | } |
b6d408ba | 1948 | |
a9e64442 WAA |
1949 | /* Send BIND_CONN_TO_SESSION */ |
1950 | if (test_and_clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION, | |
1a47e7a6 | 1951 | &clp->cl_state)) { |
8ed27d4f | 1952 | section = "bind conn to session"; |
a9e64442 WAA |
1953 | status = nfs4_bind_conn_to_session(clp); |
1954 | if (status < 0) | |
1955 | goto out_error; | |
bf674c82 | 1956 | continue; |
a9e64442 WAA |
1957 | } |
1958 | ||
1a2dd948 | 1959 | /* Recall session slots */ |
60f00153 | 1960 | if (test_and_clear_bit(NFS4CLNT_RECALL_SLOT, &clp->cl_state)) { |
1a2dd948 TM |
1961 | section = "recall slot"; |
1962 | status = nfs4_recall_slot(clp); | |
1963 | if (status < 0) | |
1964 | goto out_error; | |
1965 | continue; | |
1966 | } | |
1967 | ||
b79a4a1b | 1968 | /* First recover reboot state... */ |
e345e88a | 1969 | if (test_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) { |
8ed27d4f | 1970 | section = "reclaim reboot"; |
591d71cb | 1971 | status = nfs4_do_reclaim(clp, |
c48f4f35 | 1972 | clp->cl_mvops->reboot_recovery_ops); |
b6d408ba | 1973 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) || |
6df08189 | 1974 | test_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state)) |
c3fad1b1 | 1975 | continue; |
b79a4a1b | 1976 | nfs4_state_end_reclaim_reboot(clp); |
b6d408ba TM |
1977 | if (test_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) |
1978 | continue; | |
1979 | if (status < 0) | |
1980 | goto out_error; | |
02860014 TM |
1981 | } |
1982 | ||
b79a4a1b TM |
1983 | /* Now recover expired state... */ |
1984 | if (test_and_clear_bit(NFS4CLNT_RECLAIM_NOGRACE, &clp->cl_state)) { | |
8ed27d4f | 1985 | section = "reclaim nograce"; |
591d71cb | 1986 | status = nfs4_do_reclaim(clp, |
c48f4f35 | 1987 | clp->cl_mvops->nograce_recovery_ops); |
b6d408ba | 1988 | if (test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) || |
6df08189 | 1989 | test_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state) || |
b6d408ba TM |
1990 | test_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state)) |
1991 | continue; | |
1992 | if (status < 0) | |
b79a4a1b | 1993 | goto out_error; |
1da177e4 | 1994 | } |
707fb4b3 | 1995 | |
5601a00d | 1996 | nfs4_end_drain_session(clp); |
707fb4b3 TM |
1997 | if (test_and_clear_bit(NFS4CLNT_DELEGRETURN, &clp->cl_state)) { |
1998 | nfs_client_return_marked_delegations(clp); | |
1999 | continue; | |
2000 | } | |
e005e804 TM |
2001 | |
2002 | nfs4_clear_state_manager_bit(clp); | |
f3c76491 TM |
2003 | /* Did we race with an attempt to give us more work? */ |
2004 | if (clp->cl_state == 0) | |
2005 | break; | |
2006 | if (test_and_set_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) != 0) | |
2007 | break; | |
47c2199b | 2008 | } while (atomic_read(&clp->cl_count) > 1); |
e005e804 | 2009 | return; |
1da177e4 | 2010 | out_error: |
8ed27d4f WAA |
2011 | if (strlen(section)) |
2012 | section_sep = ": "; | |
2013 | pr_warn_ratelimited("NFS: state manager%s%s failed on NFSv4 server %s" | |
2014 | " with error %d\n", section_sep, section, | |
2015 | clp->cl_hostname, -status); | |
5601a00d | 2016 | nfs4_end_drain_session(clp); |
e005e804 TM |
2017 | nfs4_clear_state_manager_bit(clp); |
2018 | } | |
2019 | ||
2020 | static int nfs4_run_state_manager(void *ptr) | |
2021 | { | |
2022 | struct nfs_client *clp = ptr; | |
2023 | ||
2024 | allow_signal(SIGKILL); | |
2025 | nfs4_state_manager(clp); | |
2026 | nfs_put_client(clp); | |
2027 | module_put_and_exit(0); | |
2028 | return 0; | |
1da177e4 LT |
2029 | } |
2030 | ||
2031 | /* | |
2032 | * Local variables: | |
2033 | * c-basic-offset: 8 | |
2034 | * End: | |
2035 | */ |