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1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations 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 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
1da177e4
LT		 39#include <linux/delay.h>
40#include <linux/errno.h>
41#include <linux/string.h>
5a0e3ad6 42#include <linux/slab.h>
1da177e4
LT		 43#include <linux/sunrpc/clnt.h>
44#include <linux/nfs.h>
45#include <linux/nfs4.h>
46#include <linux/nfs_fs.h>
47#include <linux/nfs_page.h>
1da177e4 48#include <linux/namei.h>
02a913a7 49#include <linux/mount.h>
99fe60d0 50#include <linux/module.h>
5a0ffe54 51#include <linux/sunrpc/bc_xprt.h>
1da177e4 52
4ce79717 53#include "nfs4_fs.h"
1da177e4 54#include "delegation.h"
101070ca 55#include "internal.h"
006ea73e 56#include "iostat.h"
fc931582 57#include "callback.h"
b1f69b75 58#include "pnfs.h"
1da177e4
LT		 59
60#define NFSDBG_FACILITY NFSDBG_PROC
61
2066fe89 62#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 63#define NFS4_POLL_RETRY_MAX (15*HZ)
64
a78cb57a
TM		 65#define NFS4_MAX_LOOP_ON_RECOVER (10)
66
cdd4e68b 67struct nfs4_opendata;
864472e9 68static int _nfs4_proc_open(struct nfs4_opendata *data);
b257957e 69static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 70static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
9e33bed5 71static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
9936781d
TM		 72static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
73static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
0ab64e0e
TM		 74static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
75 struct nfs_fattr *fattr, struct iattr *sattr,
76 struct nfs4_state *state);
1da177e4 77
1da177e4 78/* Prevent leaks of NFSv4 errors into userland */
46f72f57 79static int nfs4_map_errors(int err)
1da177e4 80{
52567b03
TM		 81 if (err >= -1000)
82 return err;
83 switch (err) {
84 case -NFS4ERR_RESOURCE:
85 return -EREMOTEIO;
86 default:
1da177e4 87 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 88 __func__, -err);
52567b03 89 break;
1da177e4 90 }
52567b03 91 return -EIO;
1da177e4
LT		 92}
93
94/*
95 * This is our standard bitmap for GETATTR requests.
96 */
97const u32 nfs4_fattr_bitmap[2] = {
98 FATTR4_WORD0_TYPE
99 | FATTR4_WORD0_CHANGE
100 | FATTR4_WORD0_SIZE
101 | FATTR4_WORD0_FSID
102 | FATTR4_WORD0_FILEID,
103 FATTR4_WORD1_MODE
104 | FATTR4_WORD1_NUMLINKS
105 | FATTR4_WORD1_OWNER
106 | FATTR4_WORD1_OWNER_GROUP
107 | FATTR4_WORD1_RAWDEV
108 | FATTR4_WORD1_SPACE_USED
109 | FATTR4_WORD1_TIME_ACCESS
110 | FATTR4_WORD1_TIME_METADATA
111 | FATTR4_WORD1_TIME_MODIFY
112};
113
114const u32 nfs4_statfs_bitmap[2] = {
115 FATTR4_WORD0_FILES_AVAIL
116 | FATTR4_WORD0_FILES_FREE
117 | FATTR4_WORD0_FILES_TOTAL,
118 FATTR4_WORD1_SPACE_AVAIL
119 | FATTR4_WORD1_SPACE_FREE
120 | FATTR4_WORD1_SPACE_TOTAL
121};
122
4ce79717 123const u32 nfs4_pathconf_bitmap[2] = {
1da177e4
LT		 124 FATTR4_WORD0_MAXLINK
125 | FATTR4_WORD0_MAXNAME,
126 0
127};
128
129const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
130 | FATTR4_WORD0_MAXREAD
131 | FATTR4_WORD0_MAXWRITE
132 | FATTR4_WORD0_LEASE_TIME,
55b6e774 133 FATTR4_WORD1_TIME_DELTA
504913fb 134 | FATTR4_WORD1_FS_LAYOUT_TYPES
1da177e4
LT		 135};
136
830b8e33
MN		 137const u32 nfs4_fs_locations_bitmap[2] = {
138 FATTR4_WORD0_TYPE
139 | FATTR4_WORD0_CHANGE
140 | FATTR4_WORD0_SIZE
141 | FATTR4_WORD0_FSID
142 | FATTR4_WORD0_FILEID
143 | FATTR4_WORD0_FS_LOCATIONS,
144 FATTR4_WORD1_MODE
145 | FATTR4_WORD1_NUMLINKS
146 | FATTR4_WORD1_OWNER
147 | FATTR4_WORD1_OWNER_GROUP
148 | FATTR4_WORD1_RAWDEV
149 | FATTR4_WORD1_SPACE_USED
150 | FATTR4_WORD1_TIME_ACCESS
151 | FATTR4_WORD1_TIME_METADATA
152 | FATTR4_WORD1_TIME_MODIFY
153 | FATTR4_WORD1_MOUNTED_ON_FILEID
154};
155
bc4785cd 156static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 157 struct nfs4_readdir_arg *readdir)
158{
0dbb4c67 159 __be32 *start, *p;
1da177e4
LT		 160
161 BUG_ON(readdir->count < 80);
162 if (cookie > 2) {
b7ef1956 163 readdir->cookie = cookie;
1da177e4
LT		 164 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
165 return;
166 }
167
168 readdir->cookie = 0;
169 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
170 if (cookie == 2)
171 return;
172
173 /*
174 * NFSv4 servers do not return entries for '.' and '..'
175 * Therefore, we fake these entries here. We let '.'
176 * have cookie 0 and '..' have cookie 1. Note that
177 * when talking to the server, we always send cookie 0
178 * instead of 1 or 2.
179 */
0dbb4c67 180 start = p = kmap_atomic(*readdir->pages, KM_USER0);
1da177e4
LT		 181
182 if (cookie == 0) {
183 *p++ = xdr_one; /* next */
184 *p++ = xdr_zero; /* cookie, first word */
185 *p++ = xdr_one; /* cookie, second word */
186 *p++ = xdr_one; /* entry len */
187 memcpy(p, ".\0\0\0", 4); /* entry */
188 p++;
189 *p++ = xdr_one; /* bitmap length */
190 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
191 *p++ = htonl(8); /* attribute buffer length */
4e769b93 192 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 193 }
194
195 *p++ = xdr_one; /* next */
196 *p++ = xdr_zero; /* cookie, first word */
197 *p++ = xdr_two; /* cookie, second word */
198 *p++ = xdr_two; /* entry len */
199 memcpy(p, "..\0\0", 4); /* entry */
200 p++;
201 *p++ = xdr_one; /* bitmap length */
202 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
203 *p++ = htonl(8); /* attribute buffer length */
4e769b93 204 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 205
206 readdir->pgbase = (char *)p - (char *)start;
207 readdir->count -= readdir->pgbase;
208 kunmap_atomic(start, KM_USER0);
209}
210
65de872e
TM		 211static int nfs4_wait_clnt_recover(struct nfs_client *clp)
212{
213 int res;
214
215 might_sleep();
216
e005e804 217 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
72cb77f4 218 nfs_wait_bit_killable, TASK_KILLABLE);
65de872e
TM		 219 return res;
220}
221
222static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
223{
224 int res = 0;
225
226 might_sleep();
227
228 if (*timeout <= 0)
229 *timeout = NFS4_POLL_RETRY_MIN;
230 if (*timeout > NFS4_POLL_RETRY_MAX)
231 *timeout = NFS4_POLL_RETRY_MAX;
232 schedule_timeout_killable(*timeout);
233 if (fatal_signal_pending(current))
234 res = -ERESTARTSYS;
235 *timeout <<= 1;
236 return res;
237}
238
239/* This is the error handling routine for processes that are allowed
240 * to sleep.
241 */
242static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
243{
244 struct nfs_client *clp = server->nfs_client;
9e33bed5 245 struct nfs4_state *state = exception->state;
65de872e
TM		 246 int ret = errorcode;
247
248 exception->retry = 0;
249 switch(errorcode) {
250 case 0:
251 return 0;
9e33bed5
TM		 252 case -NFS4ERR_ADMIN_REVOKED:
253 case -NFS4ERR_BAD_STATEID:
254 case -NFS4ERR_OPENMODE:
255 if (state == NULL)
256 break;
257 nfs4_state_mark_reclaim_nograce(clp, state);
a2c0b9e2 258 goto do_state_recovery;
65de872e 259 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 260 case -NFS4ERR_STALE_CLIENTID:
65de872e 261 case -NFS4ERR_EXPIRED:
a2c0b9e2 262 goto do_state_recovery;
03391693 263#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 264 case -NFS4ERR_BADSESSION:
265 case -NFS4ERR_BADSLOT:
266 case -NFS4ERR_BAD_HIGH_SLOT:
267 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
268 case -NFS4ERR_DEADSESSION:
269 case -NFS4ERR_SEQ_FALSE_RETRY:
270 case -NFS4ERR_SEQ_MISORDERED:
271 dprintk("%s ERROR: %d Reset session\n", __func__,
272 errorcode);
0b9e2d41 273 nfs4_schedule_state_recovery(clp);
4745e315 274 exception->retry = 1;
b9179237 275 break;
03391693 276#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 277 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 278 if (exception->timeout > HZ) {
279 /* We have retried a decent amount, time to
280 * fail
281 */
282 ret = -EBUSY;
283 break;
284 }
65de872e
TM		 285 case -NFS4ERR_GRACE:
286 case -NFS4ERR_DELAY:
2c643488 287 case -EKEYEXPIRED:
65de872e
TM		 288 ret = nfs4_delay(server->client, &exception->timeout);
289 if (ret != 0)
290 break;
291 case -NFS4ERR_OLD_STATEID:
292 exception->retry = 1;
293 }
294 /* We failed to handle the error */
295 return nfs4_map_errors(ret);
a2c0b9e2
TM		 296do_state_recovery:
297 nfs4_schedule_state_recovery(clp);
298 ret = nfs4_wait_clnt_recover(clp);
299 if (ret == 0)
300 exception->retry = 1;
301 return ret;
65de872e
TM		 302}
303
304
452e9352 305static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 306{
1da177e4
LT		 307 spin_lock(&clp->cl_lock);
308 if (time_before(clp->cl_last_renewal,timestamp))
309 clp->cl_last_renewal = timestamp;
310 spin_unlock(&clp->cl_lock);
311}
312
452e9352
TM		 313static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
314{
315 do_renew_lease(server->nfs_client, timestamp);
316}
317
cccef3b9
AA		 318#if defined(CONFIG_NFS_V4_1)
319
e2c4ab3c
AA		 320/*
321 * nfs4_free_slot - free a slot and efficiently update slot table.
322 *
323 * freeing a slot is trivially done by clearing its respective bit
324 * in the bitmap.
325 * If the freed slotid equals highest_used_slotid we want to update it
326 * so that the server would be able to size down the slot table if needed,
327 * otherwise we know that the highest_used_slotid is still in use.
328 * When updating highest_used_slotid there may be "holes" in the bitmap
329 * so we need to scan down from highest_used_slotid to 0 looking for the now
330 * highest slotid in use.
331 * If none found, highest_used_slotid is set to -1.
35dc1d74
TM		 332 *
333 * Must be called while holding tbl->slot_tbl_lock
e2c4ab3c
AA		 334 */
335static void
dfb4f309 336nfs4_free_slot(struct nfs4_slot_table *tbl, struct nfs4_slot *free_slot)
e2c4ab3c 337{
dfb4f309 338 int free_slotid = free_slot - tbl->slots;
e2c4ab3c
AA		 339 int slotid = free_slotid;
340
dfb4f309 341 BUG_ON(slotid < 0 || slotid >= NFS4_MAX_SLOT_TABLE);
e2c4ab3c
AA		 342 /* clear used bit in bitmap */
343 __clear_bit(slotid, tbl->used_slots);
344
345 /* update highest_used_slotid when it is freed */
346 if (slotid == tbl->highest_used_slotid) {
347 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
bcb56164 348 if (slotid < tbl->max_slots)
e2c4ab3c
AA		 349 tbl->highest_used_slotid = slotid;
350 else
351 tbl->highest_used_slotid = -1;
352 }
e2c4ab3c
AA		 353 dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__,
354 free_slotid, tbl->highest_used_slotid);
355}
356
3bfb0fc5
AB		 357/*
358 * Signal state manager thread if session is drained
359 */
360static void nfs41_check_drain_session_complete(struct nfs4_session *ses)
361{
689cf5c1
AB		 362 struct rpc_task *task;
363
a2118c33 364 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state)) {
689cf5c1
AB		 365 task = rpc_wake_up_next(&ses->fc_slot_table.slot_tbl_waitq);
366 if (task)
367 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
3bfb0fc5
AB		 368 return;
369 }
370
371 if (ses->fc_slot_table.highest_used_slotid != -1)
372 return;
373
374 dprintk("%s COMPLETE: Session Drained\n", __func__);
375 complete(&ses->complete);
376}
377
d185a334 378static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871
AA		 379{
380 struct nfs4_slot_table *tbl;
381
d185a334 382 tbl = &res->sr_session->fc_slot_table;
dfb4f309 383 if (!res->sr_slot) {
13615871
AA		 384 /* just wake up the next guy waiting since
385 * we may have not consumed a slot after all */
691daf3b 386 dprintk("%s: No slot\n", __func__);
35dc1d74 387 return;
13615871 388 }
ea028ac9 389
35dc1d74 390 spin_lock(&tbl->slot_tbl_lock);
dfb4f309 391 nfs4_free_slot(tbl, res->sr_slot);
d185a334 392 nfs41_check_drain_session_complete(res->sr_session);
35dc1d74 393 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 394 res->sr_slot = NULL;
13615871
AA		 395}
396
14516c3a 397static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c
AA		 398{
399 unsigned long timestamp;
14516c3a 400 struct nfs_client *clp;
b0df806c
AA		 401
402 /*
403 * sr_status remains 1 if an RPC level error occurred. The server
404 * may or may not have processed the sequence operation..
405 * Proceed as if the server received and processed the sequence
406 * operation.
407 */
408 if (res->sr_status == 1)
409 res->sr_status = NFS_OK;
410
411 /* -ERESTARTSYS can result in skipping nfs41_sequence_setup */
dfb4f309 412 if (!res->sr_slot)
b0df806c
AA		 413 goto out;
414
691daf3b 415 /* Check the SEQUENCE operation status */
14516c3a
TM		 416 switch (res->sr_status) {
417 case 0:
b0df806c 418 /* Update the slot's sequence and clientid lease timer */
dfb4f309 419 ++res->sr_slot->seq_nr;
b0df806c 420 timestamp = res->sr_renewal_time;
14516c3a 421 clp = res->sr_session->clp;
452e9352 422 do_renew_lease(clp, timestamp);
0629e370 423 /* Check sequence flags */
7135840f
AB		 424 if (atomic_read(&clp->cl_count) > 1)
425 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
14516c3a
TM		 426 break;
427 case -NFS4ERR_DELAY:
428 /* The server detected a resend of the RPC call and
429 * returned NFS4ERR_DELAY as per Section 2.10.6.2
430 * of RFC5661.
431 */
12364a4f 432 dprintk("%s: slot=%td seq=%d: Operation in progress\n",
dfb4f309
BH		 433 __func__,
434 res->sr_slot - res->sr_session->fc_slot_table.slots,
435 res->sr_slot->seq_nr);
14516c3a
TM		 436 goto out_retry;
437 default:
438 /* Just update the slot sequence no. */
dfb4f309 439 ++res->sr_slot->seq_nr;
b0df806c
AA		 440 }
441out:
442 /* The session may be reset by one of the error handlers. */
443 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 444 nfs41_sequence_free_slot(res);
14516c3a
TM		 445 return 1;
446out_retry:
d05dd4e9 447 if (!rpc_restart_call(task))
14516c3a
TM		 448 goto out;
449 rpc_delay(task, NFS4_POLL_RETRY_MAX);
450 return 0;
b0df806c
AA		 451}
452
14516c3a
TM		 453static int nfs4_sequence_done(struct rpc_task *task,
454 struct nfs4_sequence_res *res)
df896455 455{
14516c3a
TM		 456 if (res->sr_session == NULL)
457 return 1;
458 return nfs41_sequence_done(task, res);
df896455
TM		 459}
460
510b8175
BH		 461/*
462 * nfs4_find_slot - efficiently look for a free slot
463 *
464 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
465 * If found, we mark the slot as used, update the highest_used_slotid,
466 * and respectively set up the sequence operation args.
467 * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise.
fbcd4abc
AA		 468 *
469 * Note: must be called with under the slot_tbl_lock.
510b8175
BH		 470 */
471static u8
40ead580 472nfs4_find_slot(struct nfs4_slot_table *tbl)
510b8175
BH		 473{
474 int slotid;
475 u8 ret_id = NFS4_MAX_SLOT_TABLE;
476 BUILD_BUG_ON((u8)NFS4_MAX_SLOT_TABLE != (int)NFS4_MAX_SLOT_TABLE);
477
510b8175
BH		 478 dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n",
479 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
480 tbl->max_slots);
481 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
482 if (slotid >= tbl->max_slots)
483 goto out;
484 __set_bit(slotid, tbl->used_slots);
485 if (slotid > tbl->highest_used_slotid)
486 tbl->highest_used_slotid = slotid;
487 ret_id = slotid;
488out:
489 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
490 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
510b8175
BH		 491 return ret_id;
492}
493
ce5039c1
AA		 494static int nfs41_setup_sequence(struct nfs4_session *session,
495 struct nfs4_sequence_args *args,
496 struct nfs4_sequence_res *res,
497 int cache_reply,
498 struct rpc_task *task)
499{
fbcd4abc
AA		 500 struct nfs4_slot *slot;
501 struct nfs4_slot_table *tbl;
502 u8 slotid;
503
504 dprintk("--> %s\n", __func__);
ce5039c1 505 /* slot already allocated? */
dfb4f309 506 if (res->sr_slot != NULL)
ce5039c1
AA		 507 return 0;
508
fbcd4abc
AA		 509 tbl = &session->fc_slot_table;
510
511 spin_lock(&tbl->slot_tbl_lock);
a2118c33 512 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
5601a00d 513 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
ea028ac9
AA		 514 /*
515 * The state manager will wait until the slot table is empty.
516 * Schedule the reset thread
517 */
05f0d236 518 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
b069d94a 519 spin_unlock(&tbl->slot_tbl_lock);
bcb56164 520 dprintk("%s Schedule Session Reset\n", __func__);
05f0d236 521 return -EAGAIN;
b069d94a
AA		 522 }
523
689cf5c1
AB		 524 if (!rpc_queue_empty(&tbl->slot_tbl_waitq) &&
525 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
526 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
527 spin_unlock(&tbl->slot_tbl_lock);
528 dprintk("%s enforce FIFO order\n", __func__);
529 return -EAGAIN;
530 }
531
40ead580 532 slotid = nfs4_find_slot(tbl);
fbcd4abc
AA		 533 if (slotid == NFS4_MAX_SLOT_TABLE) {
534 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
535 spin_unlock(&tbl->slot_tbl_lock);
536 dprintk("<-- %s: no free slots\n", __func__);
537 return -EAGAIN;
538 }
539 spin_unlock(&tbl->slot_tbl_lock);
540
689cf5c1 541 rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
fbcd4abc 542 slot = tbl->slots + slotid;
99fe60d0 543 args->sa_session = session;
fbcd4abc
AA		 544 args->sa_slotid = slotid;
545 args->sa_cache_this = cache_reply;
546
547 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
548
99fe60d0 549 res->sr_session = session;
dfb4f309 550 res->sr_slot = slot;
fbcd4abc 551 res->sr_renewal_time = jiffies;
2a6e26cd 552 res->sr_status_flags = 0;
fbcd4abc
AA		 553 /*
554 * sr_status is only set in decode_sequence, and so will remain
555 * set to 1 if an rpc level failure occurs.
556 */
557 res->sr_status = 1;
ce5039c1
AA		 558 return 0;
559}
560
035168ab 561int nfs4_setup_sequence(const struct nfs_server *server,
ce5039c1
AA		 562 struct nfs4_sequence_args *args,
563 struct nfs4_sequence_res *res,
564 int cache_reply,
565 struct rpc_task *task)
566{
035168ab 567 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 568 int ret = 0;
569
035168ab
TM		 570 if (session == NULL) {
571 args->sa_session = NULL;
572 res->sr_session = NULL;
573 goto out;
574 }
575
12364a4f 576 dprintk("--> %s clp %p session %p sr_slot %td\n",
dfb4f309
BH		 577 __func__, session->clp, session, res->sr_slot ?
578 res->sr_slot - session->fc_slot_table.slots : -1);
ce5039c1 579
035168ab 580 ret = nfs41_setup_sequence(session, args, res, cache_reply,
ce5039c1 581 task);
ce5039c1
AA		 582out:
583 dprintk("<-- %s status=%d\n", __func__, ret);
584 return ret;
585}
586
587struct nfs41_call_sync_data {
035168ab 588 const struct nfs_server *seq_server;
ce5039c1
AA		 589 struct nfs4_sequence_args *seq_args;
590 struct nfs4_sequence_res *seq_res;
591 int cache_reply;
592};
593
594static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
595{
596 struct nfs41_call_sync_data *data = calldata;
597
035168ab
TM		 598 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
599
600 if (nfs4_setup_sequence(data->seq_server, data->seq_args,
ce5039c1
AA		 601 data->seq_res, data->cache_reply, task))
602 return;
603 rpc_call_start(task);
604}
605
b257957e
AB		 606static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
607{
608 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
609 nfs41_call_sync_prepare(task, calldata);
610}
611
69ab40c4
AA		 612static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
613{
614 struct nfs41_call_sync_data *data = calldata;
615
14516c3a 616 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 617}
618
ce5039c1
AA		 619struct rpc_call_ops nfs41_call_sync_ops = {
620 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 621 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 622};
623
b257957e
AB		 624struct rpc_call_ops nfs41_call_priv_sync_ops = {
625 .rpc_call_prepare = nfs41_call_priv_sync_prepare,
626 .rpc_call_done = nfs41_call_sync_done,
627};
628
035168ab 629static int nfs4_call_sync_sequence(struct nfs_server *server,
ce5039c1
AA		 630 struct rpc_message *msg,
631 struct nfs4_sequence_args *args,
632 struct nfs4_sequence_res *res,
b257957e
AB		 633 int cache_reply,
634 int privileged)
ce5039c1
AA		 635{
636 int ret;
637 struct rpc_task *task;
638 struct nfs41_call_sync_data data = {
035168ab 639 .seq_server = server,
ce5039c1
AA		 640 .seq_args = args,
641 .seq_res = res,
642 .cache_reply = cache_reply,
643 };
644 struct rpc_task_setup task_setup = {
035168ab 645 .rpc_client = server->client,
ce5039c1
AA		 646 .rpc_message = msg,
647 .callback_ops = &nfs41_call_sync_ops,
648 .callback_data = &data
649 };
650
dfb4f309 651 res->sr_slot = NULL;
b257957e
AB		 652 if (privileged)
653 task_setup.callback_ops = &nfs41_call_priv_sync_ops;
ce5039c1
AA		 654 task = rpc_run_task(&task_setup);
655 if (IS_ERR(task))
656 ret = PTR_ERR(task);
657 else {
658 ret = task->tk_status;
659 rpc_put_task(task);
660 }
661 return ret;
662}
663
cccef3b9
AA		 664int _nfs4_call_sync_session(struct nfs_server *server,
665 struct rpc_message *msg,
666 struct nfs4_sequence_args *args,
667 struct nfs4_sequence_res *res,
668 int cache_reply)
669{
035168ab 670 return nfs4_call_sync_sequence(server, msg, args, res, cache_reply, 0);
cccef3b9
AA		 671}
672
df896455 673#else
14516c3a
TM		 674static int nfs4_sequence_done(struct rpc_task *task,
675 struct nfs4_sequence_res *res)
df896455 676{
14516c3a 677 return 1;
df896455 678}
cccef3b9
AA		 679#endif /* CONFIG_NFS_V4_1 */
680
681int _nfs4_call_sync(struct nfs_server *server,
682 struct rpc_message *msg,
683 struct nfs4_sequence_args *args,
684 struct nfs4_sequence_res *res,
685 int cache_reply)
686{
f3752975 687 args->sa_session = res->sr_session = NULL;
cccef3b9
AA		 688 return rpc_call_sync(server->client, msg, 0);
689}
690
691#define nfs4_call_sync(server, msg, args, res, cache_reply) \
97dc1359 692 (server)->nfs_client->cl_mvops->call_sync((server), (msg), &(args)->seq_args, \
cccef3b9
AA		 693 &(res)->seq_res, (cache_reply))
694
38478b24 695static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 696{
38478b24 697 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 698
38478b24 699 spin_lock(&dir->i_lock);
40d24704
TM		 700 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
701 if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
bfc69a45 702 nfs_force_lookup_revalidate(dir);
40d24704 703 nfsi->change_attr = cinfo->after;
38478b24 704 spin_unlock(&dir->i_lock);
1da177e4
LT		 705}
706
e56e0b78 707struct nfs4_opendata {
c6d00e63 708 struct kref kref;
e56e0b78
TM		 709 struct nfs_openargs o_arg;
710 struct nfs_openres o_res;
cdd4e68b
TM		 711 struct nfs_open_confirmargs c_arg;
712 struct nfs_open_confirmres c_res;
e56e0b78
TM		 713 struct nfs_fattr f_attr;
714 struct nfs_fattr dir_attr;
ad389da7 715 struct path path;
e56e0b78
TM		 716 struct dentry *dir;
717 struct nfs4_state_owner *owner;
aac00a8d 718 struct nfs4_state *state;
e56e0b78 719 struct iattr attrs;
26e976a8 720 unsigned long timestamp;
3e309914 721 unsigned int rpc_done : 1;
24ac23ab
TM		 722 int rpc_status;
723 int cancelled;
e56e0b78
TM		 724};
725
2ced46c2
TM		 726
727static void nfs4_init_opendata_res(struct nfs4_opendata *p)
728{
729 p->o_res.f_attr = &p->f_attr;
730 p->o_res.dir_attr = &p->dir_attr;
c1d51931
TM		 731 p->o_res.seqid = p->o_arg.seqid;
732 p->c_res.seqid = p->c_arg.seqid;
2ced46c2
TM		 733 p->o_res.server = p->o_arg.server;
734 nfs_fattr_init(&p->f_attr);
735 nfs_fattr_init(&p->dir_attr);
736}
737
ad389da7 738static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
dc0b027d 739 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be
TM		 740 const struct iattr *attrs,
741 gfp_t gfp_mask)
e56e0b78 742{
ad389da7 743 struct dentry *parent = dget_parent(path->dentry);
e56e0b78
TM		 744 struct inode *dir = parent->d_inode;
745 struct nfs_server *server = NFS_SERVER(dir);
746 struct nfs4_opendata *p;
747
8535b2be 748 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 749 if (p == NULL)
750 goto err;
8535b2be 751 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78
TM		 752 if (p->o_arg.seqid == NULL)
753 goto err_free;
f6948697
AV		 754 path_get(path);
755 p->path = *path;
e56e0b78
TM		 756 p->dir = parent;
757 p->owner = sp;
758 atomic_inc(&sp->so_count);
759 p->o_arg.fh = NFS_FH(dir);
dc0b027d
TM		 760 p->o_arg.open_flags = flags;
761 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
7539bbab 762 p->o_arg.clientid = server->nfs_client->cl_clientid;
9f958ab8 763 p->o_arg.id = sp->so_owner_id.id;
ad389da7 764 p->o_arg.name = &p->path.dentry->d_name;
e56e0b78
TM		 765 p->o_arg.server = server;
766 p->o_arg.bitmask = server->attr_bitmask;
767 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
d77d76ff
TM		 768 if (flags & O_CREAT) {
769 u32 *s;
770
e56e0b78
TM		 771 p->o_arg.u.attrs = &p->attrs;
772 memcpy(&p->attrs, attrs, sizeof(p->attrs));
d77d76ff
TM		 773 s = (u32 *) p->o_arg.u.verifier.data;
774 s[0] = jiffies;
775 s[1] = current->pid;
e56e0b78 776 }
cdd4e68b
TM		 777 p->c_arg.fh = &p->o_res.fh;
778 p->c_arg.stateid = &p->o_res.stateid;
779 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 780 nfs4_init_opendata_res(p);
c6d00e63 781 kref_init(&p->kref);
e56e0b78
TM		 782 return p;
783err_free:
784 kfree(p);
785err:
786 dput(parent);
787 return NULL;
788}
789
c6d00e63 790static void nfs4_opendata_free(struct kref *kref)
e56e0b78 791{
c6d00e63
TM		 792 struct nfs4_opendata *p = container_of(kref,
793 struct nfs4_opendata, kref);
794
795 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 796 if (p->state != NULL)
797 nfs4_put_open_state(p->state);
c6d00e63
TM		 798 nfs4_put_state_owner(p->owner);
799 dput(p->dir);
31f31db1 800 path_put(&p->path);
c6d00e63
TM		 801 kfree(p);
802}
803
804static void nfs4_opendata_put(struct nfs4_opendata *p)
805{
806 if (p != NULL)
807 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 808}
809
06f814a3
TM		 810static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
811{
06f814a3
TM		 812 int ret;
813
06f814a3 814 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 815 return ret;
816}
817
dc0b027d 818static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 819{
820 int ret = 0;
dc0b027d
TM		 821
822 if (open_mode & O_EXCL)
823 goto out;
824 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 825 case FMODE_READ:
88069f77
TM		 826 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
827 && state->n_rdonly != 0;
6ee41268
TM		 828 break;
829 case FMODE_WRITE:
88069f77
TM		 830 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
831 && state->n_wronly != 0;
6ee41268
TM		 832 break;
833 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 834 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
835 && state->n_rdwr != 0;
6ee41268 836 }
dc0b027d 837out:
6ee41268
TM		 838 return ret;
839}
840
dc0b027d 841static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 842{
dc0b027d 843 if ((delegation->type & fmode) != fmode)
aac00a8d 844 return 0;
15c831bf 845 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 846 return 0;
b7391f44 847 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 848 return 1;
849}
850
dc0b027d 851static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 852{
dc0b027d 853 switch (fmode) {
e7616923
TM		 854 case FMODE_WRITE:
855 state->n_wronly++;
856 break;
857 case FMODE_READ:
858 state->n_rdonly++;
859 break;
860 case FMODE_READ|FMODE_WRITE:
861 state->n_rdwr++;
862 }
dc0b027d 863 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 864}
865
dc0b027d 866static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 867{
868 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
869 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
870 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
dc0b027d 871 switch (fmode) {
003707c7
TM		 872 case FMODE_READ:
873 set_bit(NFS_O_RDONLY_STATE, &state->flags);
874 break;
875 case FMODE_WRITE:
876 set_bit(NFS_O_WRONLY_STATE, &state->flags);
877 break;
878 case FMODE_READ|FMODE_WRITE:
879 set_bit(NFS_O_RDWR_STATE, &state->flags);
880 }
e7616923
TM		 881}
882
dc0b027d 883static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 884{
8bda4e4c 885 write_seqlock(&state->seqlock);
dc0b027d 886 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 887 write_sequnlock(&state->seqlock);
003707c7
TM		 888}
889
dc0b027d 890static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 891{
8bda4e4c
TM		 892 /*
893 * Protect the call to nfs4_state_set_mode_locked and
894 * serialise the stateid update
895 */
896 write_seqlock(&state->seqlock);
003707c7
TM		 897 if (deleg_stateid != NULL) {
898 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
899 set_bit(NFS_DELEGATED_STATE, &state->flags);
900 }
901 if (open_stateid != NULL)
dc0b027d 902 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 903 write_sequnlock(&state->seqlock);
904 spin_lock(&state->owner->so_lock);
dc0b027d 905 update_open_stateflags(state, fmode);
ec073428 906 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 907}
908
dc0b027d 909static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 910{
911 struct nfs_inode *nfsi = NFS_I(state->inode);
912 struct nfs_delegation *deleg_cur;
913 int ret = 0;
914
dc0b027d 915 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 916
917 rcu_read_lock();
918 deleg_cur = rcu_dereference(nfsi->delegation);
919 if (deleg_cur == NULL)
920 goto no_delegation;
921
922 spin_lock(&deleg_cur->lock);
923 if (nfsi->delegation != deleg_cur ||
dc0b027d 924 (deleg_cur->type & fmode) != fmode)
34310430
TM		 925 goto no_delegation_unlock;
926
927 if (delegation == NULL)
928 delegation = &deleg_cur->stateid;
929 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
930 goto no_delegation_unlock;
931
b7391f44 932 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 933 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 934 ret = 1;
935no_delegation_unlock:
936 spin_unlock(&deleg_cur->lock);
937no_delegation:
938 rcu_read_unlock();
939
940 if (!ret && open_stateid != NULL) {
dc0b027d 941 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 942 ret = 1;
943 }
944
945 return ret;
946}
947
948
dc0b027d 949static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 950{
951 struct nfs_delegation *delegation;
952
953 rcu_read_lock();
954 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 955 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 956 rcu_read_unlock();
957 return;
958 }
959 rcu_read_unlock();
960 nfs_inode_return_delegation(inode);
961}
962
6ee41268 963static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 964{
965 struct nfs4_state *state = opendata->state;
966 struct nfs_inode *nfsi = NFS_I(state->inode);
967 struct nfs_delegation *delegation;
dc0b027d
TM		 968 int open_mode = opendata->o_arg.open_flags & O_EXCL;
969 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 970 nfs4_stateid stateid;
971 int ret = -EAGAIN;
972
aac00a8d 973 for (;;) {
dc0b027d 974 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 975 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 976 if (can_open_cached(state, fmode, open_mode)) {
977 update_open_stateflags(state, fmode);
6ee41268 978 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 979 goto out_return_state;
980 }
981 spin_unlock(&state->owner->so_lock);
982 }
34310430
TM		 983 rcu_read_lock();
984 delegation = rcu_dereference(nfsi->delegation);
985 if (delegation == NULL ||
dc0b027d 986 !can_open_delegated(delegation, fmode)) {
34310430 987 rcu_read_unlock();
aac00a8d 988 break;
34310430 989 }
aac00a8d
TM		 990 /* Save the delegation */
991 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
992 rcu_read_unlock();
af22f94a 993 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM		 994 if (ret != 0)
995 goto out;
996 ret = -EAGAIN;
34310430
TM		 997
998 /* Try to update the stateid using the delegation */
dc0b027d 999 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1000 goto out_return_state;
aac00a8d 1001 }
aac00a8d
TM		 1002out:
1003 return ERR_PTR(ret);
1004out_return_state:
1005 atomic_inc(&state->count);
1006 return state;
1007}
1008
24ac23ab
TM		 1009static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1010{
1011 struct inode *inode;
1012 struct nfs4_state *state = NULL;
003707c7 1013 struct nfs_delegation *delegation;
1b370bc2 1014 int ret;
24ac23ab 1015
aac00a8d 1016 if (!data->rpc_done) {
6ee41268 1017 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1018 goto out;
1019 }
1020
1b370bc2 1021 ret = -EAGAIN;
24ac23ab 1022 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1023 goto err;
24ac23ab 1024 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 1025 ret = PTR_ERR(inode);
03f28e3a 1026 if (IS_ERR(inode))
1b370bc2
TM		 1027 goto err;
1028 ret = -ENOMEM;
24ac23ab
TM		 1029 state = nfs4_get_open_state(inode, data->owner);
1030 if (state == NULL)
1b370bc2 1031 goto err_put_inode;
549d6ed5 1032 if (data->o_res.delegation_type != 0) {
549d6ed5
TM		 1033 int delegation_flags = 0;
1034
003707c7
TM		 1035 rcu_read_lock();
1036 delegation = rcu_dereference(NFS_I(inode)->delegation);
1037 if (delegation)
1038 delegation_flags = delegation->flags;
1039 rcu_read_unlock();
15c831bf 1040 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
549d6ed5
TM		 1041 nfs_inode_set_delegation(state->inode,
1042 data->owner->so_cred,
1043 &data->o_res);
1044 else
1045 nfs_inode_reclaim_delegation(state->inode,
1046 data->owner->so_cred,
1047 &data->o_res);
1048 }
34310430
TM		 1049
1050 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1051 data->o_arg.fmode);
24ac23ab 1052 iput(inode);
aac00a8d 1053out:
24ac23ab 1054 return state;
1b370bc2
TM		 1055err_put_inode:
1056 iput(inode);
1057err:
1058 return ERR_PTR(ret);
24ac23ab
TM		 1059}
1060
864472e9
TM		 1061static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1062{
1063 struct nfs_inode *nfsi = NFS_I(state->inode);
1064 struct nfs_open_context *ctx;
1065
1066 spin_lock(&state->inode->i_lock);
1067 list_for_each_entry(ctx, &nfsi->open_files, list) {
1068 if (ctx->state != state)
1069 continue;
1070 get_nfs_open_context(ctx);
1071 spin_unlock(&state->inode->i_lock);
1072 return ctx;
1073 }
1074 spin_unlock(&state->inode->i_lock);
1075 return ERR_PTR(-ENOENT);
1076}
1077
6f220ed5
TM		 1078static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1079{
1080 struct nfs4_opendata *opendata;
1081
8535b2be 1082 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL, GFP_NOFS);
6f220ed5
TM		 1083 if (opendata == NULL)
1084 return ERR_PTR(-ENOMEM);
1085 opendata->state = state;
1086 atomic_inc(&state->count);
1087 return opendata;
1088}
1089
dc0b027d 1090static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1091{
2ced46c2 1092 struct nfs4_state *newstate;
864472e9
TM		 1093 int ret;
1094
dc0b027d
TM		 1095 opendata->o_arg.open_flags = 0;
1096 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1097 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1098 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1099 nfs4_init_opendata_res(opendata);
b257957e 1100 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1101 if (ret != 0)
1102 return ret;
2ced46c2 1103 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1104 if (IS_ERR(newstate))
1105 return PTR_ERR(newstate);
dc0b027d 1106 nfs4_close_state(&opendata->path, newstate, fmode);
2ced46c2 1107 *res = newstate;
864472e9
TM		 1108 return 0;
1109}
1110
1111static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1112{
864472e9 1113 struct nfs4_state *newstate;
864472e9
TM		 1114 int ret;
1115
1116 /* memory barrier prior to reading state->n_* */
2ced46c2 1117 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 1118 smp_rmb();
1119 if (state->n_rdwr != 0) {
b0ed9dbc 1120 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2ced46c2 1121 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1122 if (ret != 0)
1123 return ret;
2ced46c2
TM		 1124 if (newstate != state)
1125 return -ESTALE;
864472e9
TM		 1126 }
1127 if (state->n_wronly != 0) {
b0ed9dbc 1128 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2ced46c2 1129 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1130 if (ret != 0)
1131 return ret;
2ced46c2
TM		 1132 if (newstate != state)
1133 return -ESTALE;
864472e9
TM		 1134 }
1135 if (state->n_rdonly != 0) {
b0ed9dbc 1136 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2ced46c2 1137 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1138 if (ret != 0)
1139 return ret;
2ced46c2
TM		 1140 if (newstate != state)
1141 return -ESTALE;
864472e9 1142 }
1ac7e2fd
TM		 1143 /*
1144 * We may have performed cached opens for all three recoveries.
1145 * Check if we need to update the current stateid.
1146 */
1147 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1148 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
8bda4e4c 1149 write_seqlock(&state->seqlock);
1ac7e2fd
TM		 1150 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1151 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
8bda4e4c 1152 write_sequnlock(&state->seqlock);
1ac7e2fd 1153 }
864472e9
TM		 1154 return 0;
1155}
1156
1da177e4
LT		 1157/*
1158 * OPEN_RECLAIM:
1159 * reclaim state on the server after a reboot.
1da177e4 1160 */
539cd03a 1161static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1162{
1ac7e2fd 1163 struct nfs_delegation *delegation;
864472e9 1164 struct nfs4_opendata *opendata;
dc0b027d 1165 fmode_t delegation_type = 0;
1da177e4
LT		 1166 int status;
1167
6f220ed5
TM		 1168 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1169 if (IS_ERR(opendata))
1170 return PTR_ERR(opendata);
864472e9
TM		 1171 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1172 opendata->o_arg.fh = NFS_FH(state->inode);
1ac7e2fd
TM		 1173 rcu_read_lock();
1174 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1175 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1176 delegation_type = delegation->type;
1ac7e2fd 1177 rcu_read_unlock();
864472e9
TM		 1178 opendata->o_arg.u.delegation_type = delegation_type;
1179 status = nfs4_open_recover(opendata, state);
c6d00e63 1180 nfs4_opendata_put(opendata);
1da177e4
LT		 1181 return status;
1182}
1183
539cd03a 1184static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1185{
1186 struct nfs_server *server = NFS_SERVER(state->inode);
1187 struct nfs4_exception exception = { };
1188 int err;
1189 do {
539cd03a 1190 err = _nfs4_do_open_reclaim(ctx, state);
168667c4 1191 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1192 break;
1193 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1194 } while (exception.retry);
1195 return err;
1196}
1197
864472e9
TM		 1198static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1199{
1200 struct nfs_open_context *ctx;
1201 int ret;
1202
1203 ctx = nfs4_state_find_open_context(state);
1204 if (IS_ERR(ctx))
1205 return PTR_ERR(ctx);
539cd03a 1206 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1207 put_nfs_open_context(ctx);
1208 return ret;
1209}
1210
13437e12 1211static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4 1212{
e56e0b78 1213 struct nfs4_opendata *opendata;
864472e9 1214 int ret;
1da177e4 1215
6f220ed5
TM		 1216 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1217 if (IS_ERR(opendata))
1218 return PTR_ERR(opendata);
e56e0b78 1219 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
13437e12 1220 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
e56e0b78 1221 sizeof(opendata->o_arg.u.delegation.data));
864472e9 1222 ret = nfs4_open_recover(opendata, state);
c6d00e63 1223 nfs4_opendata_put(opendata);
864472e9 1224 return ret;
1da177e4
LT		 1225}
1226
13437e12 1227int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT		 1228{
1229 struct nfs4_exception exception = { };
539cd03a 1230 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT		 1231 int err;
1232 do {
13437e12 1233 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1da177e4
LT		 1234 switch (err) {
1235 case 0:
965b5d67
TM		 1236 case -ENOENT:
1237 case -ESTALE:
1238 goto out;
bcfa49f6
RL		 1239 case -NFS4ERR_BADSESSION:
1240 case -NFS4ERR_BADSLOT:
1241 case -NFS4ERR_BAD_HIGH_SLOT:
1242 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1243 case -NFS4ERR_DEADSESSION:
1244 nfs4_schedule_state_recovery(
1245 server->nfs_client);
1246 goto out;
1da177e4
LT		 1247 case -NFS4ERR_STALE_CLIENTID:
1248 case -NFS4ERR_STALE_STATEID:
1249 case -NFS4ERR_EXPIRED:
1250 /* Don't recall a delegation if it was lost */
7539bbab 1251 nfs4_schedule_state_recovery(server->nfs_client);
965b5d67
TM		 1252 goto out;
1253 case -ERESTARTSYS:
1254 /*
1255 * The show must go on: exit, but mark the
1256 * stateid as needing recovery.
1257 */
1258 case -NFS4ERR_ADMIN_REVOKED:
1259 case -NFS4ERR_BAD_STATEID:
1260 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
168667c4
TM		 1261 case -EKEYEXPIRED:
1262 /*
1263 * User RPCSEC_GSS context has expired.
1264 * We cannot recover this stateid now, so
1265 * skip it and allow recovery thread to
1266 * proceed.
1267 */
965b5d67
TM		 1268 case -ENOMEM:
1269 err = 0;
1270 goto out;
1da177e4
LT		 1271 }
1272 err = nfs4_handle_exception(server, err, &exception);
1273 } while (exception.retry);
965b5d67 1274out:
1da177e4
LT		 1275 return err;
1276}
1277
cdd4e68b
TM		 1278static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1279{
1280 struct nfs4_opendata *data = calldata;
1281
1282 data->rpc_status = task->tk_status;
26e976a8 1283 if (data->rpc_status == 0) {
cdd4e68b
TM		 1284 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
1285 sizeof(data->o_res.stateid.data));
bb22629e 1286 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1287 renew_lease(data->o_res.server, data->timestamp);
3e309914 1288 data->rpc_done = 1;
26e976a8 1289 }
cdd4e68b
TM		 1290}
1291
1292static void nfs4_open_confirm_release(void *calldata)
1293{
1294 struct nfs4_opendata *data = calldata;
1295 struct nfs4_state *state = NULL;
1296
1297 /* If this request hasn't been cancelled, do nothing */
1298 if (data->cancelled == 0)
1299 goto out_free;
1300 /* In case of error, no cleanup! */
3e309914 1301 if (!data->rpc_done)
cdd4e68b 1302 goto out_free;
cdd4e68b 1303 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1304 if (!IS_ERR(state))
dc0b027d 1305 nfs4_close_state(&data->path, state, data->o_arg.fmode);
cdd4e68b 1306out_free:
c6d00e63 1307 nfs4_opendata_put(data);
cdd4e68b
TM		 1308}
1309
1310static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1311 .rpc_call_done = nfs4_open_confirm_done,
1312 .rpc_release = nfs4_open_confirm_release,
1313};
1314
1315/*
1316 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1317 */
1318static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1319{
1320 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1321 struct rpc_task *task;
5138fde0
TM		 1322 struct rpc_message msg = {
1323 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1324 .rpc_argp = &data->c_arg,
1325 .rpc_resp = &data->c_res,
1326 .rpc_cred = data->owner->so_cred,
1327 };
c970aa85
TM		 1328 struct rpc_task_setup task_setup_data = {
1329 .rpc_client = server->client,
5138fde0 1330 .rpc_message = &msg,
c970aa85
TM		 1331 .callback_ops = &nfs4_open_confirm_ops,
1332 .callback_data = data,
101070ca 1333 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1334 .flags = RPC_TASK_ASYNC,
1335 };
1da177e4
LT		 1336 int status;
1337
c6d00e63 1338 kref_get(&data->kref);
3e309914
TM		 1339 data->rpc_done = 0;
1340 data->rpc_status = 0;
5138fde0 1341 data->timestamp = jiffies;
c970aa85 1342 task = rpc_run_task(&task_setup_data);
7a1218a2 1343 if (IS_ERR(task))
cdd4e68b 1344 return PTR_ERR(task);
cdd4e68b
TM		 1345 status = nfs4_wait_for_completion_rpc_task(task);
1346 if (status != 0) {
1347 data->cancelled = 1;
1348 smp_wmb();
1349 } else
1350 status = data->rpc_status;
e6b3c4db 1351 rpc_put_task(task);
1da177e4
LT		 1352 return status;
1353}
1354
24ac23ab 1355static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1356{
24ac23ab
TM		 1357 struct nfs4_opendata *data = calldata;
1358 struct nfs4_state_owner *sp = data->owner;
5138fde0 1359
24ac23ab
TM		 1360 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1361 return;
aac00a8d
TM		 1362 /*
1363 * Check if we still need to send an OPEN call, or if we can use
1364 * a delegation instead.
1365 */
1366 if (data->state != NULL) {
1367 struct nfs_delegation *delegation;
1368
dc0b027d 1369 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1370 goto out_no_action;
aac00a8d
TM		 1371 rcu_read_lock();
1372 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1373 if (delegation != NULL &&
15c831bf 1374 test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) {
aac00a8d 1375 rcu_read_unlock();
6ee41268 1376 goto out_no_action;
aac00a8d
TM		 1377 }
1378 rcu_read_unlock();
1379 }
24ac23ab 1380 /* Update sequence id. */
9f958ab8 1381 data->o_arg.id = sp->so_owner_id.id;
1f0e890d 1382 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
6f220ed5 1383 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
5138fde0 1384 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1385 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1386 }
26e976a8 1387 data->timestamp = jiffies;
035168ab 1388 if (nfs4_setup_sequence(data->o_arg.server,
d898528c
AA		 1389 &data->o_arg.seq_args,
1390 &data->o_res.seq_res, 1, task))
1391 return;
5138fde0 1392 rpc_call_start(task);
6ee41268
TM		 1393 return;
1394out_no_action:
1395 task->tk_action = NULL;
1396
24ac23ab 1397}
1da177e4 1398
b257957e
AB		 1399static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata)
1400{
1401 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
1402 nfs4_open_prepare(task, calldata);
1403}
1404
24ac23ab
TM		 1405static void nfs4_open_done(struct rpc_task *task, void *calldata)
1406{
1407 struct nfs4_opendata *data = calldata;
1da177e4 1408
24ac23ab 1409 data->rpc_status = task->tk_status;
d898528c 1410
14516c3a
TM		 1411 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1412 return;
d898528c 1413
24ac23ab
TM		 1414 if (task->tk_status == 0) {
1415 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1416 case S_IFREG:
1417 break;
1418 case S_IFLNK:
24ac23ab 1419 data->rpc_status = -ELOOP;
6f926b5b
TM		 1420 break;
1421 case S_IFDIR:
24ac23ab 1422 data->rpc_status = -EISDIR;
6f926b5b
TM		 1423 break;
1424 default:
24ac23ab 1425 data->rpc_status = -ENOTDIR;
6f926b5b 1426 }
26e976a8 1427 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1428 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1429 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1430 }
3e309914 1431 data->rpc_done = 1;
24ac23ab 1432}
6f926b5b 1433
24ac23ab
TM		 1434static void nfs4_open_release(void *calldata)
1435{
1436 struct nfs4_opendata *data = calldata;
1437 struct nfs4_state *state = NULL;
1438
1439 /* If this request hasn't been cancelled, do nothing */
1440 if (data->cancelled == 0)
1441 goto out_free;
1442 /* In case of error, no cleanup! */
3e309914 1443 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1444 goto out_free;
1445 /* In case we need an open_confirm, no cleanup! */
1446 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1447 goto out_free;
24ac23ab 1448 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1449 if (!IS_ERR(state))
dc0b027d 1450 nfs4_close_state(&data->path, state, data->o_arg.fmode);
24ac23ab 1451out_free:
c6d00e63 1452 nfs4_opendata_put(data);
24ac23ab
TM		 1453}
1454
1455static const struct rpc_call_ops nfs4_open_ops = {
1456 .rpc_call_prepare = nfs4_open_prepare,
1457 .rpc_call_done = nfs4_open_done,
1458 .rpc_release = nfs4_open_release,
1459};
1460
b257957e
AB		 1461static const struct rpc_call_ops nfs4_recover_open_ops = {
1462 .rpc_call_prepare = nfs4_recover_open_prepare,
1463 .rpc_call_done = nfs4_open_done,
1464 .rpc_release = nfs4_open_release,
1465};
1466
1467static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1468{
1469 struct inode *dir = data->dir->d_inode;
1470 struct nfs_server *server = NFS_SERVER(dir);
1471 struct nfs_openargs *o_arg = &data->o_arg;
1472 struct nfs_openres *o_res = &data->o_res;
1473 struct rpc_task *task;
5138fde0
TM		 1474 struct rpc_message msg = {
1475 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1476 .rpc_argp = o_arg,
1477 .rpc_resp = o_res,
1478 .rpc_cred = data->owner->so_cred,
1479 };
c970aa85
TM		 1480 struct rpc_task_setup task_setup_data = {
1481 .rpc_client = server->client,
5138fde0 1482 .rpc_message = &msg,
c970aa85
TM		 1483 .callback_ops = &nfs4_open_ops,
1484 .callback_data = data,
101070ca 1485 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1486 .flags = RPC_TASK_ASYNC,
1487 };
24ac23ab
TM		 1488 int status;
1489
c6d00e63 1490 kref_get(&data->kref);
3e309914
TM		 1491 data->rpc_done = 0;
1492 data->rpc_status = 0;
2ced46c2 1493 data->cancelled = 0;
b257957e
AB		 1494 if (isrecover)
1495 task_setup_data.callback_ops = &nfs4_recover_open_ops;
c970aa85 1496 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1497 if (IS_ERR(task))
1498 return PTR_ERR(task);
1499 status = nfs4_wait_for_completion_rpc_task(task);
1500 if (status != 0) {
1501 data->cancelled = 1;
1502 smp_wmb();
1503 } else
1504 status = data->rpc_status;
1505 rpc_put_task(task);
1506
1507 return status;
1508}
1509
1510static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1511{
1512 struct inode *dir = data->dir->d_inode;
1513 struct nfs_openres *o_res = &data->o_res;
1514 int status;
1515
1516 status = nfs4_run_open_task(data, 1);
1517 if (status != 0 || !data->rpc_done)
1518 return status;
1519
1520 nfs_refresh_inode(dir, o_res->dir_attr);
1521
1522 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1523 status = _nfs4_proc_open_confirm(data);
1524 if (status != 0)
1525 return status;
1526 }
1527
1528 return status;
1529}
1530
1531/*
1532 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1533 */
1534static int _nfs4_proc_open(struct nfs4_opendata *data)
1535{
1536 struct inode *dir = data->dir->d_inode;
1537 struct nfs_server *server = NFS_SERVER(dir);
1538 struct nfs_openargs *o_arg = &data->o_arg;
1539 struct nfs_openres *o_res = &data->o_res;
1540 int status;
1541
1542 status = nfs4_run_open_task(data, 0);
3e309914 1543 if (status != 0 || !data->rpc_done)
24ac23ab
TM		 1544 return status;
1545
56ae19f3
TM		 1546 if (o_arg->open_flags & O_CREAT) {
1547 update_changeattr(dir, &o_res->cinfo);
1548 nfs_post_op_update_inode(dir, o_res->dir_attr);
1549 } else
1550 nfs_refresh_inode(dir, o_res->dir_attr);
0df5dd4a
TM		 1551 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1552 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1553 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1554 status = _nfs4_proc_open_confirm(data);
1da177e4 1555 if (status != 0)
24ac23ab 1556 return status;
1da177e4
LT		 1557 }
1558 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1559 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1560 return 0;
1da177e4
LT		 1561}
1562
10afec90 1563static int nfs4_recover_expired_lease(struct nfs_server *server)
58d9714a 1564{
7539bbab 1565 struct nfs_client *clp = server->nfs_client;
a78cb57a 1566 unsigned int loop;
6b30954e 1567 int ret;
58d9714a 1568
a78cb57a 1569 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
65de872e 1570 ret = nfs4_wait_clnt_recover(clp);
6b30954e 1571 if (ret != 0)
a78cb57a 1572 break;
e598d843
TM		 1573 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1574 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
6b30954e 1575 break;
58d9714a 1576 nfs4_schedule_state_recovery(clp);
a78cb57a 1577 ret = -EIO;
6b30954e 1578 }
a78cb57a 1579 return ret;
58d9714a
TM		 1580}
1581
1da177e4
LT		 1582/*
1583 * OPEN_EXPIRED:
1584 * reclaim state on the server after a network partition.
1585 * Assumes caller holds the appropriate lock
1586 */
539cd03a 1587static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1588{
e56e0b78 1589 struct nfs4_opendata *opendata;
864472e9 1590 int ret;
1da177e4 1591
6f220ed5
TM		 1592 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1593 if (IS_ERR(opendata))
1594 return PTR_ERR(opendata);
864472e9 1595 ret = nfs4_open_recover(opendata, state);
35d05778 1596 if (ret == -ESTALE)
539cd03a 1597 d_drop(ctx->path.dentry);
c6d00e63 1598 nfs4_opendata_put(opendata);
864472e9 1599 return ret;
1da177e4
LT		 1600}
1601
a9ed2e25 1602static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1603{
539cd03a 1604 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1605 struct nfs4_exception exception = { };
1606 int err;
1607
1608 do {
539cd03a 1609 err = _nfs4_open_expired(ctx, state);
a9ed2e25
TM		 1610 switch (err) {
1611 default:
1612 goto out;
1613 case -NFS4ERR_GRACE:
1614 case -NFS4ERR_DELAY:
1615 nfs4_handle_exception(server, err, &exception);
1616 err = 0;
1617 }
202b50dc 1618 } while (exception.retry);
a9ed2e25 1619out:
202b50dc
TM		 1620 return err;
1621}
1622
1da177e4
LT		 1623static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1624{
1da177e4 1625 struct nfs_open_context *ctx;
864472e9 1626 int ret;
1da177e4 1627
864472e9
TM		 1628 ctx = nfs4_state_find_open_context(state);
1629 if (IS_ERR(ctx))
1630 return PTR_ERR(ctx);
539cd03a 1631 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1632 put_nfs_open_context(ctx);
1633 return ret;
1da177e4
LT		 1634}
1635
aa53ed54
JL		 1636/*
1637 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1638 * fields corresponding to attributes that were used to store the verifier.
1639 * Make sure we clobber those fields in the later setattr call
1640 */
1641static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1642{
1643 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1644 !(sattr->ia_valid & ATTR_ATIME_SET))
1645 sattr->ia_valid |= ATTR_ATIME;
1646
1647 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1648 !(sattr->ia_valid & ATTR_MTIME_SET))
1649 sattr->ia_valid |= ATTR_MTIME;
1650}
1651
1da177e4 1652/*
24ac23ab 1653 * Returns a referenced nfs4_state
1da177e4 1654 */
dc0b027d 1655static int _nfs4_do_open(struct inode *dir, struct path *path, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res)
1da177e4
LT		 1656{
1657 struct nfs4_state_owner *sp;
1658 struct nfs4_state *state = NULL;
1659 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1660 struct nfs4_opendata *opendata;
aac00a8d 1661 int status;
1da177e4
LT		 1662
1663 /* Protect against reboot recovery conflicts */
1da177e4
LT		 1664 status = -ENOMEM;
1665 if (!(sp = nfs4_get_state_owner(server, cred))) {
1666 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1667 goto out_err;
1668 }
58d9714a
TM		 1669 status = nfs4_recover_expired_lease(server);
1670 if (status != 0)
b4454fe1 1671 goto err_put_state_owner;
aac00a8d 1672 if (path->dentry->d_inode != NULL)
dc0b027d 1673 nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode);
58d9714a 1674 status = -ENOMEM;
8535b2be 1675 opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr, GFP_KERNEL);
e56e0b78 1676 if (opendata == NULL)
95d35cb4 1677 goto err_put_state_owner;
1da177e4 1678
aac00a8d
TM		 1679 if (path->dentry->d_inode != NULL)
1680 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1681
24ac23ab 1682 status = _nfs4_proc_open(opendata);
1da177e4 1683 if (status != 0)
c6d00e63 1684 goto err_opendata_put;
1da177e4 1685
24ac23ab 1686 state = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1687 status = PTR_ERR(state);
1688 if (IS_ERR(state))
c6d00e63 1689 goto err_opendata_put;
0df5dd4a 1690 if (server->caps & NFS_CAP_POSIX_LOCK)
8e469ebd 1691 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
0ab64e0e
TM		 1692
1693 if (opendata->o_arg.open_flags & O_EXCL) {
1694 nfs4_exclusive_attrset(opendata, sattr);
1695
1696 nfs_fattr_init(opendata->o_res.f_attr);
1697 status = nfs4_do_setattr(state->inode, cred,
1698 opendata->o_res.f_attr, sattr,
1699 state);
1700 if (status == 0)
1701 nfs_setattr_update_inode(state->inode, sattr);
1702 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
1703 }
c6d00e63 1704 nfs4_opendata_put(opendata);
1da177e4 1705 nfs4_put_state_owner(sp);
1da177e4
LT		 1706 *res = state;
1707 return 0;
c6d00e63
TM		 1708err_opendata_put:
1709 nfs4_opendata_put(opendata);
e56e0b78
TM		 1710err_put_state_owner:
1711 nfs4_put_state_owner(sp);
1da177e4 1712out_err:
1da177e4
LT		 1713 *res = NULL;
1714 return status;
1715}
1716
1717
dc0b027d 1718static struct nfs4_state *nfs4_do_open(struct inode *dir, struct path *path, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred)
1da177e4
LT		 1719{
1720 struct nfs4_exception exception = { };
1721 struct nfs4_state *res;
1722 int status;
1723
1724 do {
dc0b027d 1725 status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res);
1da177e4
LT		 1726 if (status == 0)
1727 break;
1728 /* NOTE: BAD_SEQID means the server and client disagree about the
1729 * book-keeping w.r.t. state-changing operations
1730 * (OPEN/CLOSE/LOCK/LOCKU...)
1731 * It is actually a sign of a bug on the client or on the server.
1732 *
1733 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1734 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 1735 * have unhashed the old state_owner for us, and that we can
1736 * therefore safely retry using a new one. We should still warn
1737 * the user though...
1738 */
1739 if (status == -NFS4ERR_BAD_SEQID) {
6f43ddcc
TM		 1740 printk(KERN_WARNING "NFS: v4 server %s "
1741 " returned a bad sequence-id error!\n",
1742 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 1743 exception.retry = 1;
1744 continue;
1745 }
550f5747
TM		 1746 /*
1747 * BAD_STATEID on OPEN means that the server cancelled our
1748 * state before it received the OPEN_CONFIRM.
1749 * Recover by retrying the request as per the discussion
1750 * on Page 181 of RFC3530.
1751 */
1752 if (status == -NFS4ERR_BAD_STATEID) {
1753 exception.retry = 1;
1754 continue;
1755 }
aac00a8d
TM		 1756 if (status == -EAGAIN) {
1757 /* We must have found a delegation */
1758 exception.retry = 1;
1759 continue;
1760 }
1da177e4
LT		 1761 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1762 status, &exception));
1763 } while (exception.retry);
1764 return res;
1765}
1766
659bfcd6
TM		 1767static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1768 struct nfs_fattr *fattr, struct iattr *sattr,
1769 struct nfs4_state *state)
1da177e4 1770{
3e4f6290 1771 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1772 struct nfs_setattrargs arg = {
3e4f6290 1773 .fh = NFS_FH(inode),
1da177e4
LT		 1774 .iap = sattr,
1775 .server = server,
1776 .bitmask = server->attr_bitmask,
1777 };
1778 struct nfs_setattrres res = {
1779 .fattr = fattr,
1780 .server = server,
1781 };
1782 struct rpc_message msg = {
659bfcd6
TM		 1783 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1784 .rpc_argp = &arg,
1785 .rpc_resp = &res,
1786 .rpc_cred = cred,
1da177e4 1787 };
26e976a8 1788 unsigned long timestamp = jiffies;
65e4308d 1789 int status;
1da177e4 1790
0e574af1 1791 nfs_fattr_init(fattr);
1da177e4 1792
3e4f6290
TM		 1793 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1794 /* Use that stateid */
1795 } else if (state != NULL) {
77041ed9 1796 nfs4_copy_stateid(&arg.stateid, state, current->files, current->tgid);
08e9eac4 1797 } else
1da177e4
LT		 1798 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1799
cccef3b9 1800 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
26e976a8
TM		 1801 if (status == 0 && state != NULL)
1802 renew_lease(server, timestamp);
65e4308d 1803 return status;
1da177e4
LT		 1804}
1805
659bfcd6
TM		 1806static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1807 struct nfs_fattr *fattr, struct iattr *sattr,
1808 struct nfs4_state *state)
1da177e4 1809{
3e4f6290 1810 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 1811 struct nfs4_exception exception = { };
1812 int err;
1813 do {
1814 err = nfs4_handle_exception(server,
659bfcd6 1815 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1da177e4
LT		 1816 &exception);
1817 } while (exception.retry);
1818 return err;
1819}
1820
1821struct nfs4_closedata {
4a35bd41 1822 struct path path;
1da177e4
LT		 1823 struct inode *inode;
1824 struct nfs4_state *state;
1825 struct nfs_closeargs arg;
1826 struct nfs_closeres res;
516a6af6 1827 struct nfs_fattr fattr;
26e976a8 1828 unsigned long timestamp;
1da177e4
LT		 1829};
1830
963d8fe5 1831static void nfs4_free_closedata(void *data)
9512135d 1832{
963d8fe5
TM		 1833 struct nfs4_closedata *calldata = data;
1834 struct nfs4_state_owner *sp = calldata->state->owner;
9512135d
TM		 1835
1836 nfs4_put_open_state(calldata->state);
1837 nfs_free_seqid(calldata->arg.seqid);
9512135d 1838 nfs4_put_state_owner(sp);
31f31db1 1839 path_put(&calldata->path);
9512135d
TM		 1840 kfree(calldata);
1841}
1842
88069f77
TM		 1843static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
1844 fmode_t fmode)
1845{
1846 spin_lock(&state->owner->so_lock);
1847 if (!(fmode & FMODE_READ))
1848 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1849 if (!(fmode & FMODE_WRITE))
1850 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1851 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1852 spin_unlock(&state->owner->so_lock);
1853}
1854
963d8fe5 1855static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 1856{
963d8fe5 1857 struct nfs4_closedata *calldata = data;
1da177e4 1858 struct nfs4_state *state = calldata->state;
1da177e4
LT		 1859 struct nfs_server *server = NFS_SERVER(calldata->inode);
1860
14516c3a
TM		 1861 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
1862 return;
1da177e4
LT		 1863 /* hmm. we are done with the inode, and in the process of freeing
1864 * the state_owner. we keep this around to process errors
1865 */
1da177e4
LT		 1866 switch (task->tk_status) {
1867 case 0:
45328c35 1868 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 1869 renew_lease(server, calldata->timestamp);
88069f77
TM		 1870 nfs4_close_clear_stateid_flags(state,
1871 calldata->arg.fmode);
1da177e4
LT		 1872 break;
1873 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 1874 case -NFS4ERR_OLD_STATEID:
1875 case -NFS4ERR_BAD_STATEID:
1da177e4 1876 case -NFS4ERR_EXPIRED:
dc0b027d 1877 if (calldata->arg.fmode == 0)
9e33bed5 1878 break;
1da177e4 1879 default:
72211dbe
TM		 1880 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
1881 rpc_restart_call_prepare(task);
1da177e4 1882 }
72211dbe 1883 nfs_release_seqid(calldata->arg.seqid);
516a6af6 1884 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1da177e4
LT		 1885}
1886
4ce70ada 1887static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 1888{
4ce70ada 1889 struct nfs4_closedata *calldata = data;
9512135d 1890 struct nfs4_state *state = calldata->state;
88069f77 1891 int call_close = 0;
9512135d 1892
963d8fe5 1893 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 1894 return;
003707c7 1895
88069f77
TM		 1896 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1897 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 1898 spin_lock(&state->owner->so_lock);
003707c7 1899 /* Calculate the change in open mode */
e7616923 1900 if (state->n_rdwr == 0) {
003707c7 1901 if (state->n_rdonly == 0) {
88069f77
TM		 1902 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
1903 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
1904 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 1905 }
1906 if (state->n_wronly == 0) {
88069f77
TM		 1907 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
1908 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
1909 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 1910 }
e7616923 1911 }
4cecb76f 1912 spin_unlock(&state->owner->so_lock);
88069f77
TM		 1913
1914 if (!call_close) {
963d8fe5
TM		 1915 /* Note: exit _without_ calling nfs4_close_done */
1916 task->tk_action = NULL;
9512135d
TM		 1917 return;
1918 }
88069f77
TM		 1919
1920 if (calldata->arg.fmode == 0)
1921 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
1922
516a6af6 1923 nfs_fattr_init(calldata->res.fattr);
26e976a8 1924 calldata->timestamp = jiffies;
035168ab 1925 if (nfs4_setup_sequence(NFS_SERVER(calldata->inode),
19ddab06
AA		 1926 &calldata->arg.seq_args, &calldata->res.seq_res,
1927 1, task))
1928 return;
5138fde0 1929 rpc_call_start(task);
1da177e4
LT		 1930}
1931
963d8fe5 1932static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 1933 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 1934 .rpc_call_done = nfs4_close_done,
1935 .rpc_release = nfs4_free_closedata,
1936};
1937
1da177e4
LT		 1938/*
1939 * It is possible for data to be read/written from a mem-mapped file
1940 * after the sys_close call (which hits the vfs layer as a flush).
1941 * This means that we can't safely call nfsv4 close on a file until
1942 * the inode is cleared. This in turn means that we are not good
1943 * NFSv4 citizens - we do not indicate to the server to update the file's
1944 * share state even when we are done with one of the three share
1945 * stateid's in the inode.
1946 *
1947 * NOTE: Caller must be holding the sp->so_owner semaphore!
1948 */
8535b2be 1949int nfs4_do_close(struct path *path, struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 1950{
4a35bd41 1951 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 1952 struct nfs4_closedata *calldata;
b39e625b
TM		 1953 struct nfs4_state_owner *sp = state->owner;
1954 struct rpc_task *task;
5138fde0
TM		 1955 struct rpc_message msg = {
1956 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1957 .rpc_cred = state->owner->so_cred,
1958 };
c970aa85
TM		 1959 struct rpc_task_setup task_setup_data = {
1960 .rpc_client = server->client,
5138fde0 1961 .rpc_message = &msg,
c970aa85 1962 .callback_ops = &nfs4_close_ops,
101070ca 1963 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1964 .flags = RPC_TASK_ASYNC,
1965 };
9512135d 1966 int status = -ENOMEM;
1da177e4 1967
8535b2be 1968 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 1969 if (calldata == NULL)
9512135d 1970 goto out;
4a35bd41 1971 calldata->inode = state->inode;
1da177e4 1972 calldata->state = state;
4a35bd41 1973 calldata->arg.fh = NFS_FH(state->inode);
003707c7 1974 calldata->arg.stateid = &state->open_stateid;
1da177e4 1975 /* Serialization for the sequence id */
8535b2be 1976 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 1977 if (calldata->arg.seqid == NULL)
1978 goto out_free_calldata;
dc0b027d 1979 calldata->arg.fmode = 0;
a65318bf 1980 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 1981 calldata->res.fattr = &calldata->fattr;
c1d51931 1982 calldata->res.seqid = calldata->arg.seqid;
516a6af6 1983 calldata->res.server = server;
f6948697
AV		 1984 path_get(path);
1985 calldata->path = *path;
9512135d 1986
5138fde0
TM		 1987 msg.rpc_argp = &calldata->arg,
1988 msg.rpc_resp = &calldata->res,
c970aa85
TM		 1989 task_setup_data.callback_data = calldata;
1990 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 1991 if (IS_ERR(task))
1992 return PTR_ERR(task);
a49c3c77
TM		 1993 status = 0;
1994 if (wait)
1995 status = rpc_wait_for_completion_task(task);
b39e625b 1996 rpc_put_task(task);
a49c3c77 1997 return status;
9512135d
TM		 1998out_free_calldata:
1999 kfree(calldata);
2000out:
b39e625b
TM		 2001 nfs4_put_open_state(state);
2002 nfs4_put_state_owner(sp);
9512135d 2003 return status;
1da177e4
LT		 2004}
2005
2b484297 2006static struct inode *
cd9a1c0e 2007nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
1da177e4 2008{
1da177e4 2009 struct nfs4_state *state;
1da177e4 2010
565277f6 2011 /* Protect against concurrent sillydeletes */
cd9a1c0e 2012 state = nfs4_do_open(dir, &ctx->path, ctx->mode, open_flags, attr, ctx->cred);
f46e0bd3
TM		 2013 if (IS_ERR(state))
2014 return ERR_CAST(state);
cd9a1c0e 2015 ctx->state = state;
f46e0bd3 2016 return igrab(state->inode);
1da177e4
LT		 2017}
2018
1185a552 2019static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2020{
2021 if (ctx->state == NULL)
2022 return;
2023 if (is_sync)
2024 nfs4_close_sync(&ctx->path, ctx->state, ctx->mode);
2025 else
2026 nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
2027}
1da177e4
LT		 2028
2029static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2030{
43652ad5
BH		 2031 struct nfs4_server_caps_arg args = {
2032 .fhandle = fhandle,
2033 };
1da177e4
LT		 2034 struct nfs4_server_caps_res res = {};
2035 struct rpc_message msg = {
2036 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2037 .rpc_argp = &args,
1da177e4
LT		 2038 .rpc_resp = &res,
2039 };
2040 int status;
2041
cccef3b9 2042 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2043 if (status == 0) {
2044 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2045 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2046 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2047 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2048 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2049 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2050 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2051 server->caps |= NFS_CAP_ACLS;
2052 if (res.has_links != 0)
2053 server->caps |= NFS_CAP_HARDLINKS;
2054 if (res.has_symlinks != 0)
2055 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2056 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2057 server->caps |= NFS_CAP_FILEID;
2058 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2059 server->caps |= NFS_CAP_MODE;
2060 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2061 server->caps |= NFS_CAP_NLINK;
2062 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2063 server->caps |= NFS_CAP_OWNER;
2064 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2065 server->caps |= NFS_CAP_OWNER_GROUP;
2066 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2067 server->caps |= NFS_CAP_ATIME;
2068 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2069 server->caps |= NFS_CAP_CTIME;
2070 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2071 server->caps |= NFS_CAP_MTIME;
2072
a65318bf
TM		 2073 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2074 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2075 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4
LT		 2076 server->acl_bitmask = res.acl_bitmask;
2077 }
cccef3b9 2078
1da177e4
LT		 2079 return status;
2080}
2081
55a97593 2082int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2083{
2084 struct nfs4_exception exception = { };
2085 int err;
2086 do {
2087 err = nfs4_handle_exception(server,
2088 _nfs4_server_capabilities(server, fhandle),
2089 &exception);
2090 } while (exception.retry);
2091 return err;
2092}
2093
2094static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2095 struct nfs_fsinfo *info)
2096{
1da177e4
LT		 2097 struct nfs4_lookup_root_arg args = {
2098 .bitmask = nfs4_fattr_bitmap,
2099 };
2100 struct nfs4_lookup_res res = {
2101 .server = server,
0e574af1 2102 .fattr = info->fattr,
1da177e4
LT		 2103 .fh = fhandle,
2104 };
2105 struct rpc_message msg = {
2106 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2107 .rpc_argp = &args,
2108 .rpc_resp = &res,
2109 };
008f55d0 2110
0e574af1 2111 nfs_fattr_init(info->fattr);
fccba804 2112 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2113}
2114
2115static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2116 struct nfs_fsinfo *info)
2117{
2118 struct nfs4_exception exception = { };
2119 int err;
2120 do {
2121 err = nfs4_handle_exception(server,
2122 _nfs4_lookup_root(server, fhandle, info),
2123 &exception);
2124 } while (exception.retry);
2125 return err;
2126}
2127
54ceac45
DH		 2128/*
2129 * get the file handle for the "/" directory on the server
2130 */
1da177e4 2131static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2132 struct nfs_fsinfo *info)
1da177e4 2133{
1da177e4
LT		 2134 int status;
2135
1da177e4 2136 status = nfs4_lookup_root(server, fhandle, info);
1da177e4
LT		 2137 if (status == 0)
2138 status = nfs4_server_capabilities(server, fhandle);
2139 if (status == 0)
2140 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 2141 return nfs4_map_errors(status);
1da177e4
LT		 2142}
2143
6b97fd3d
MN		 2144/*
2145 * Get locations and (maybe) other attributes of a referral.
2146 * Note that we'll actually follow the referral later when
2147 * we detect fsid mismatch in inode revalidation
2148 */
56659e99 2149static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
6b97fd3d
MN		 2150{
2151 int status = -ENOMEM;
2152 struct page *page = NULL;
2153 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2154
2155 page = alloc_page(GFP_KERNEL);
2156 if (page == NULL)
2157 goto out;
2158 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2159 if (locations == NULL)
2160 goto out;
2161
c228fd3a 2162 status = nfs4_proc_fs_locations(dir, name, locations, page);
6b97fd3d
MN		 2163 if (status != 0)
2164 goto out;
2165 /* Make sure server returned a different fsid for the referral */
2166 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
3110ff80 2167 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2168 status = -EIO;
2169 goto out;
2170 }
2171
2172 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2173 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
2174 if (!fattr->mode)
2175 fattr->mode = S_IFDIR;
2176 memset(fhandle, 0, sizeof(struct nfs_fh));
2177out:
2178 if (page)
2179 __free_page(page);
5d7ca35a 2180 kfree(locations);
6b97fd3d
MN		 2181 return status;
2182}
2183
1da177e4
LT		 2184static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2185{
2186 struct nfs4_getattr_arg args = {
2187 .fh = fhandle,
2188 .bitmask = server->attr_bitmask,
2189 };
2190 struct nfs4_getattr_res res = {
2191 .fattr = fattr,
2192 .server = server,
2193 };
2194 struct rpc_message msg = {
2195 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2196 .rpc_argp = &args,
2197 .rpc_resp = &res,
2198 };
2199
0e574af1 2200 nfs_fattr_init(fattr);
cccef3b9 2201 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2202}
2203
2204static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2205{
2206 struct nfs4_exception exception = { };
2207 int err;
2208 do {
2209 err = nfs4_handle_exception(server,
2210 _nfs4_proc_getattr(server, fhandle, fattr),
2211 &exception);
2212 } while (exception.retry);
2213 return err;
2214}
2215
2216/*
2217 * The file is not closed if it is opened due to the a request to change
2218 * the size of the file. The open call will not be needed once the
2219 * VFS layer lookup-intents are implemented.
2220 *
2221 * Close is called when the inode is destroyed.
2222 * If we haven't opened the file for O_WRONLY, we
2223 * need to in the size_change case to obtain a stateid.
2224 *
2225 * Got race?
2226 * Because OPEN is always done by name in nfsv4, it is
2227 * possible that we opened a different file by the same
2228 * name. We can recognize this race condition, but we
2229 * can't do anything about it besides returning an error.
2230 *
2231 * This will be fixed with VFS changes (lookup-intent).
2232 */
2233static int
2234nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2235 struct iattr *sattr)
2236{
08e9eac4 2237 struct inode *inode = dentry->d_inode;
659bfcd6 2238 struct rpc_cred *cred = NULL;
d530838b 2239 struct nfs4_state *state = NULL;
1da177e4
LT		 2240 int status;
2241
0e574af1 2242 nfs_fattr_init(fattr);
1da177e4 2243
d530838b 2244 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2245 if (sattr->ia_valid & ATTR_FILE) {
2246 struct nfs_open_context *ctx;
2247
2248 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2249 if (ctx) {
2250 cred = ctx->cred;
2251 state = ctx->state;
2252 }
659bfcd6 2253 }
08e9eac4 2254
659bfcd6 2255 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2256 if (status == 0)
2257 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2258 return status;
2259}
2260
56659e99
TM		 2261static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
2262 const struct qstr *name, struct nfs_fh *fhandle,
2b3de441
DH		 2263 struct nfs_fattr *fattr)
2264{
2265 int status;
2266 struct nfs4_lookup_arg args = {
2267 .bitmask = server->attr_bitmask,
2268 .dir_fh = dirfh,
2269 .name = name,
2270 };
2271 struct nfs4_lookup_res res = {
2272 .server = server,
2273 .fattr = fattr,
2274 .fh = fhandle,
2275 };
2276 struct rpc_message msg = {
2277 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2278 .rpc_argp = &args,
2279 .rpc_resp = &res,
2280 };
2281
2282 nfs_fattr_init(fattr);
2283
2284 dprintk("NFS call lookupfh %s\n", name->name);
cccef3b9 2285 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2b3de441 2286 dprintk("NFS reply lookupfh: %d\n", status);
2b3de441
DH		 2287 return status;
2288}
2289
2290static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
2291 struct qstr *name, struct nfs_fh *fhandle,
2292 struct nfs_fattr *fattr)
2293{
2294 struct nfs4_exception exception = { };
2295 int err;
2296 do {
4e56e082
TM		 2297 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
2298 /* FIXME: !!!! */
2299 if (err == -NFS4ERR_MOVED) {
2300 err = -EREMOTE;
2301 break;
2302 }
2303 err = nfs4_handle_exception(server, err, &exception);
2b3de441
DH		 2304 } while (exception.retry);
2305 return err;
2306}
2307
56659e99 2308static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1da177e4
LT		 2309 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2310{
4e56e082 2311 int status;
1da177e4
LT		 2312
2313 dprintk("NFS call lookup %s\n", name->name);
4e56e082 2314 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
6b97fd3d
MN		 2315 if (status == -NFS4ERR_MOVED)
2316 status = nfs4_get_referral(dir, name, fattr, fhandle);
1da177e4
LT		 2317 dprintk("NFS reply lookup: %d\n", status);
2318 return status;
2319}
2320
2321static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2322{
2323 struct nfs4_exception exception = { };
2324 int err;
2325 do {
2326 err = nfs4_handle_exception(NFS_SERVER(dir),
2327 _nfs4_proc_lookup(dir, name, fhandle, fattr),
2328 &exception);
2329 } while (exception.retry);
2330 return err;
2331}
2332
2333static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2334{
76b32999 2335 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2336 struct nfs4_accessargs args = {
2337 .fh = NFS_FH(inode),
76b32999
TM		 2338 .bitmask = server->attr_bitmask,
2339 };
2340 struct nfs4_accessres res = {
2341 .server = server,
1da177e4 2342 };
1da177e4
LT		 2343 struct rpc_message msg = {
2344 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2345 .rpc_argp = &args,
2346 .rpc_resp = &res,
2347 .rpc_cred = entry->cred,
2348 };
2349 int mode = entry->mask;
2350 int status;
2351
2352 /*
2353 * Determine which access bits we want to ask for...
2354 */
2355 if (mode & MAY_READ)
2356 args.access |= NFS4_ACCESS_READ;
2357 if (S_ISDIR(inode->i_mode)) {
2358 if (mode & MAY_WRITE)
2359 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2360 if (mode & MAY_EXEC)
2361 args.access |= NFS4_ACCESS_LOOKUP;
2362 } else {
2363 if (mode & MAY_WRITE)
2364 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2365 if (mode & MAY_EXEC)
2366 args.access |= NFS4_ACCESS_EXECUTE;
2367 }
c407d41a
TM		 2368
2369 res.fattr = nfs_alloc_fattr();
2370 if (res.fattr == NULL)
2371 return -ENOMEM;
2372
cccef3b9 2373 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2374 if (!status) {
2375 entry->mask = 0;
2376 if (res.access & NFS4_ACCESS_READ)
2377 entry->mask |= MAY_READ;
2378 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2379 entry->mask |= MAY_WRITE;
2380 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2381 entry->mask |= MAY_EXEC;
c407d41a 2382 nfs_refresh_inode(inode, res.fattr);
1da177e4 2383 }
c407d41a 2384 nfs_free_fattr(res.fattr);
1da177e4
LT		 2385 return status;
2386}
2387
2388static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2389{
2390 struct nfs4_exception exception = { };
2391 int err;
2392 do {
2393 err = nfs4_handle_exception(NFS_SERVER(inode),
2394 _nfs4_proc_access(inode, entry),
2395 &exception);
2396 } while (exception.retry);
2397 return err;
2398}
2399
2400/*
2401 * TODO: For the time being, we don't try to get any attributes
2402 * along with any of the zero-copy operations READ, READDIR,
2403 * READLINK, WRITE.
2404 *
2405 * In the case of the first three, we want to put the GETATTR
2406 * after the read-type operation -- this is because it is hard
2407 * to predict the length of a GETATTR response in v4, and thus
2408 * align the READ data correctly. This means that the GETATTR
2409 * may end up partially falling into the page cache, and we should
2410 * shift it into the 'tail' of the xdr_buf before processing.
2411 * To do this efficiently, we need to know the total length
2412 * of data received, which doesn't seem to be available outside
2413 * of the RPC layer.
2414 *
2415 * In the case of WRITE, we also want to put the GETATTR after
2416 * the operation -- in this case because we want to make sure
2417 * we get the post-operation mtime and size. This means that
2418 * we can't use xdr_encode_pages() as written: we need a variant
2419 * of it which would leave room in the 'tail' iovec.
2420 *
2421 * Both of these changes to the XDR layer would in fact be quite
2422 * minor, but I decided to leave them for a subsequent patch.
2423 */
2424static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2425 unsigned int pgbase, unsigned int pglen)
2426{
2427 struct nfs4_readlink args = {
2428 .fh = NFS_FH(inode),
2429 .pgbase = pgbase,
2430 .pglen = pglen,
2431 .pages = &page,
2432 };
f50c7000 2433 struct nfs4_readlink_res res;
1da177e4
LT		 2434 struct rpc_message msg = {
2435 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2436 .rpc_argp = &args,
f50c7000 2437 .rpc_resp = &res,
1da177e4
LT		 2438 };
2439
cccef3b9 2440 return nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
1da177e4
LT		 2441}
2442
2443static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2444 unsigned int pgbase, unsigned int pglen)
2445{
2446 struct nfs4_exception exception = { };
2447 int err;
2448 do {
2449 err = nfs4_handle_exception(NFS_SERVER(inode),
2450 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2451 &exception);
2452 } while (exception.retry);
2453 return err;
2454}
2455
1da177e4
LT		 2456/*
2457 * Got race?
2458 * We will need to arrange for the VFS layer to provide an atomic open.
2459 * Until then, this create/open method is prone to inefficiency and race
2460 * conditions due to the lookup, create, and open VFS calls from sys_open()
2461 * placed on the wire.
2462 *
2463 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2464 * The file will be opened again in the subsequent VFS open call
2465 * (nfs4_proc_file_open).
2466 *
2467 * The open for read will just hang around to be used by any process that
2468 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2469 */
2470
2471static int
2472nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
c0204fd2 2473 int flags, struct nfs_open_context *ctx)
1da177e4 2474{
c0204fd2 2475 struct path my_path = {
ad389da7
TM		 2476 .dentry = dentry,
2477 };
c0204fd2 2478 struct path *path = &my_path;
1da177e4 2479 struct nfs4_state *state;
c0204fd2
TM		 2480 struct rpc_cred *cred = NULL;
2481 fmode_t fmode = 0;
1da177e4
LT		 2482 int status = 0;
2483
c0204fd2
TM		 2484 if (ctx != NULL) {
2485 cred = ctx->cred;
2486 path = &ctx->path;
2487 fmode = ctx->mode;
1da177e4 2488 }
c0204fd2 2489 state = nfs4_do_open(dir, path, fmode, flags, sattr, cred);
d4d9cdcb 2490 d_drop(dentry);
1da177e4
LT		 2491 if (IS_ERR(state)) {
2492 status = PTR_ERR(state);
c0204fd2 2493 goto out;
1da177e4 2494 }
d4d9cdcb 2495 d_add(dentry, igrab(state->inode));
d75340cc 2496 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
c0204fd2
TM		 2497 if (ctx != NULL)
2498 ctx->state = state;
02a913a7 2499 else
c0204fd2 2500 nfs4_close_sync(path, state, fmode);
1da177e4
LT		 2501out:
2502 return status;
2503}
2504
2505static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2506{
16e42959 2507 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2508 struct nfs_removeargs args = {
1da177e4 2509 .fh = NFS_FH(dir),
4fdc17b2
TM		 2510 .name.len = name->len,
2511 .name.name = name->name,
16e42959
TM		 2512 .bitmask = server->attr_bitmask,
2513 };
4fdc17b2 2514 struct nfs_removeres res = {
16e42959 2515 .server = server,
1da177e4 2516 };
1da177e4 2517 struct rpc_message msg = {
4fdc17b2
TM		 2518 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2519 .rpc_argp = &args,
2520 .rpc_resp = &res,
1da177e4 2521 };
d346890b
TM		 2522 int status = -ENOMEM;
2523
2524 res.dir_attr = nfs_alloc_fattr();
2525 if (res.dir_attr == NULL)
2526 goto out;
1da177e4 2527
cccef3b9 2528 status = nfs4_call_sync(server, &msg, &args, &res, 1);
16e42959
TM		 2529 if (status == 0) {
2530 update_changeattr(dir, &res.cinfo);
d346890b 2531 nfs_post_op_update_inode(dir, res.dir_attr);
16e42959 2532 }
d346890b
TM		 2533 nfs_free_fattr(res.dir_attr);
2534out:
1da177e4
LT		 2535 return status;
2536}
2537
2538static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2539{
2540 struct nfs4_exception exception = { };
2541 int err;
2542 do {
2543 err = nfs4_handle_exception(NFS_SERVER(dir),
2544 _nfs4_proc_remove(dir, name),
2545 &exception);
2546 } while (exception.retry);
2547 return err;
2548}
2549
e4eff1a6 2550static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 2551{
e4eff1a6
TM		 2552 struct nfs_server *server = NFS_SERVER(dir);
2553 struct nfs_removeargs *args = msg->rpc_argp;
2554 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 2555
a65318bf 2556 args->bitmask = server->cache_consistency_bitmask;
e4eff1a6 2557 res->server = server;
dfb4f309 2558 res->seq_res.sr_slot = NULL;
1da177e4 2559 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1da177e4
LT		 2560}
2561
e4eff1a6 2562static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 2563{
e4eff1a6
TM		 2564 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2565
14516c3a
TM		 2566 if (!nfs4_sequence_done(task, &res->seq_res))
2567 return 0;
9e33bed5 2568 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 2569 return 0;
2570 update_changeattr(dir, &res->cinfo);
d346890b 2571 nfs_post_op_update_inode(dir, res->dir_attr);
e4eff1a6 2572 return 1;
1da177e4
LT		 2573}
2574
d3d4152a
JL		 2575static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
2576{
2577 struct nfs_server *server = NFS_SERVER(dir);
2578 struct nfs_renameargs *arg = msg->rpc_argp;
2579 struct nfs_renameres *res = msg->rpc_resp;
2580
2581 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
2582 arg->bitmask = server->attr_bitmask;
2583 res->server = server;
2584}
2585
2586static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
2587 struct inode *new_dir)
2588{
2589 struct nfs_renameres *res = task->tk_msg.rpc_resp;
2590
2591 if (!nfs4_sequence_done(task, &res->seq_res))
2592 return 0;
2593 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2594 return 0;
2595
2596 update_changeattr(old_dir, &res->old_cinfo);
2597 nfs_post_op_update_inode(old_dir, res->old_fattr);
2598 update_changeattr(new_dir, &res->new_cinfo);
2599 nfs_post_op_update_inode(new_dir, res->new_fattr);
2600 return 1;
2601}
2602
1da177e4
LT		 2603static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2604 struct inode *new_dir, struct qstr *new_name)
2605{
6caf2c82 2606 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 2607 struct nfs_renameargs arg = {
1da177e4
LT		 2608 .old_dir = NFS_FH(old_dir),
2609 .new_dir = NFS_FH(new_dir),
2610 .old_name = old_name,
2611 .new_name = new_name,
6caf2c82
TM		 2612 .bitmask = server->attr_bitmask,
2613 };
e8582a8b 2614 struct nfs_renameres res = {
6caf2c82 2615 .server = server,
1da177e4 2616 };
1da177e4
LT		 2617 struct rpc_message msg = {
2618 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2619 .rpc_argp = &arg,
2620 .rpc_resp = &res,
2621 };
011fff72 2622 int status = -ENOMEM;
1da177e4 2623
011fff72
TM		 2624 res.old_fattr = nfs_alloc_fattr();
2625 res.new_fattr = nfs_alloc_fattr();
2626 if (res.old_fattr == NULL || res.new_fattr == NULL)
2627 goto out;
1da177e4 2628
011fff72 2629 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
1da177e4
LT		 2630 if (!status) {
2631 update_changeattr(old_dir, &res.old_cinfo);
6caf2c82 2632 nfs_post_op_update_inode(old_dir, res.old_fattr);
1da177e4 2633 update_changeattr(new_dir, &res.new_cinfo);
6caf2c82 2634 nfs_post_op_update_inode(new_dir, res.new_fattr);
1da177e4 2635 }
011fff72
TM		 2636out:
2637 nfs_free_fattr(res.new_fattr);
2638 nfs_free_fattr(res.old_fattr);
1da177e4
LT		 2639 return status;
2640}
2641
2642static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2643 struct inode *new_dir, struct qstr *new_name)
2644{
2645 struct nfs4_exception exception = { };
2646 int err;
2647 do {
2648 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2649 _nfs4_proc_rename(old_dir, old_name,
2650 new_dir, new_name),
2651 &exception);
2652 } while (exception.retry);
2653 return err;
2654}
2655
2656static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2657{
91ba2eee 2658 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2659 struct nfs4_link_arg arg = {
2660 .fh = NFS_FH(inode),
2661 .dir_fh = NFS_FH(dir),
2662 .name = name,
91ba2eee
TM		 2663 .bitmask = server->attr_bitmask,
2664 };
91ba2eee
TM		 2665 struct nfs4_link_res res = {
2666 .server = server,
1da177e4 2667 };
1da177e4
LT		 2668 struct rpc_message msg = {
2669 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2670 .rpc_argp = &arg,
91ba2eee 2671 .rpc_resp = &res,
1da177e4 2672 };
136f2627
TM		 2673 int status = -ENOMEM;
2674
2675 res.fattr = nfs_alloc_fattr();
2676 res.dir_attr = nfs_alloc_fattr();
2677 if (res.fattr == NULL || res.dir_attr == NULL)
2678 goto out;
1da177e4 2679
cccef3b9 2680 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
91ba2eee
TM		 2681 if (!status) {
2682 update_changeattr(dir, &res.cinfo);
2683 nfs_post_op_update_inode(dir, res.dir_attr);
73a3d07c 2684 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 2685 }
136f2627
TM		 2686out:
2687 nfs_free_fattr(res.dir_attr);
2688 nfs_free_fattr(res.fattr);
1da177e4
LT		 2689 return status;
2690}
2691
2692static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2693{
2694 struct nfs4_exception exception = { };
2695 int err;
2696 do {
2697 err = nfs4_handle_exception(NFS_SERVER(inode),
2698 _nfs4_proc_link(inode, dir, name),
2699 &exception);
2700 } while (exception.retry);
2701 return err;
2702}
2703
57dc9a57
TM		 2704struct nfs4_createdata {
2705 struct rpc_message msg;
2706 struct nfs4_create_arg arg;
2707 struct nfs4_create_res res;
2708 struct nfs_fh fh;
2709 struct nfs_fattr fattr;
2710 struct nfs_fattr dir_fattr;
2711};
2712
2713static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2714 struct qstr *name, struct iattr *sattr, u32 ftype)
2715{
2716 struct nfs4_createdata *data;
2717
2718 data = kzalloc(sizeof(*data), GFP_KERNEL);
2719 if (data != NULL) {
2720 struct nfs_server *server = NFS_SERVER(dir);
2721
2722 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2723 data->msg.rpc_argp = &data->arg;
2724 data->msg.rpc_resp = &data->res;
2725 data->arg.dir_fh = NFS_FH(dir);
2726 data->arg.server = server;
2727 data->arg.name = name;
2728 data->arg.attrs = sattr;
2729 data->arg.ftype = ftype;
2730 data->arg.bitmask = server->attr_bitmask;
2731 data->res.server = server;
2732 data->res.fh = &data->fh;
2733 data->res.fattr = &data->fattr;
2734 data->res.dir_fattr = &data->dir_fattr;
2735 nfs_fattr_init(data->res.fattr);
2736 nfs_fattr_init(data->res.dir_fattr);
2737 }
2738 return data;
2739}
2740
2741static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2742{
cccef3b9
AA		 2743 int status = nfs4_call_sync(NFS_SERVER(dir), &data->msg,
2744 &data->arg, &data->res, 1);
57dc9a57
TM		 2745 if (status == 0) {
2746 update_changeattr(dir, &data->res.dir_cinfo);
2747 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2748 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2749 }
2750 return status;
2751}
2752
2753static void nfs4_free_createdata(struct nfs4_createdata *data)
2754{
2755 kfree(data);
2756}
2757
4f390c15 2758static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2759 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 2760{
57dc9a57
TM		 2761 struct nfs4_createdata *data;
2762 int status = -ENAMETOOLONG;
1da177e4 2763
94a6d753 2764 if (len > NFS4_MAXPATHLEN)
57dc9a57 2765 goto out;
4f390c15 2766
57dc9a57
TM		 2767 status = -ENOMEM;
2768 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2769 if (data == NULL)
2770 goto out;
2771
2772 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2773 data->arg.u.symlink.pages = &page;
2774 data->arg.u.symlink.len = len;
1da177e4 2775
57dc9a57
TM		 2776 status = nfs4_do_create(dir, dentry, data);
2777
2778 nfs4_free_createdata(data);
2779out:
1da177e4
LT		 2780 return status;
2781}
2782
4f390c15 2783static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2784 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 2785{
2786 struct nfs4_exception exception = { };
2787 int err;
2788 do {
2789 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 2790 _nfs4_proc_symlink(dir, dentry, page,
2791 len, sattr),
1da177e4
LT		 2792 &exception);
2793 } while (exception.retry);
2794 return err;
2795}
2796
2797static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2798 struct iattr *sattr)
2799{
57dc9a57
TM		 2800 struct nfs4_createdata *data;
2801 int status = -ENOMEM;
1da177e4 2802
57dc9a57
TM		 2803 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2804 if (data == NULL)
2805 goto out;
2806
2807 status = nfs4_do_create(dir, dentry, data);
2808
2809 nfs4_free_createdata(data);
2810out:
1da177e4
LT		 2811 return status;
2812}
2813
2814static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2815 struct iattr *sattr)
2816{
2817 struct nfs4_exception exception = { };
2818 int err;
2819 do {
2820 err = nfs4_handle_exception(NFS_SERVER(dir),
2821 _nfs4_proc_mkdir(dir, dentry, sattr),
2822 &exception);
2823 } while (exception.retry);
2824 return err;
2825}
2826
2827static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 2828 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 2829{
2830 struct inode *dir = dentry->d_inode;
2831 struct nfs4_readdir_arg args = {
2832 .fh = NFS_FH(dir),
56e4ebf8 2833 .pages = pages,
1da177e4
LT		 2834 .pgbase = 0,
2835 .count = count,
96d25e53 2836 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 2837 .plus = plus,
1da177e4
LT		 2838 };
2839 struct nfs4_readdir_res res;
2840 struct rpc_message msg = {
2841 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2842 .rpc_argp = &args,
2843 .rpc_resp = &res,
2844 .rpc_cred = cred,
2845 };
2846 int status;
2847
3110ff80 2848 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 2849 dentry->d_parent->d_name.name,
2850 dentry->d_name.name,
2851 (unsigned long long)cookie);
1da177e4
LT		 2852 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2853 res.pgbase = args.pgbase;
cccef3b9 2854 status = nfs4_call_sync(NFS_SERVER(dir), &msg, &args, &res, 0);
1da177e4
LT		 2855 if (status == 0)
2856 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
c4812998
TM		 2857
2858 nfs_invalidate_atime(dir);
2859
3110ff80 2860 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 2861 return status;
2862}
2863
2864static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 2865 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 2866{
2867 struct nfs4_exception exception = { };
2868 int err;
2869 do {
2870 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2871 _nfs4_proc_readdir(dentry, cred, cookie,
56e4ebf8 2872 pages, count, plus),
1da177e4
LT		 2873 &exception);
2874 } while (exception.retry);
2875 return err;
2876}
2877
2878static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2879 struct iattr *sattr, dev_t rdev)
2880{
57dc9a57
TM		 2881 struct nfs4_createdata *data;
2882 int mode = sattr->ia_mode;
2883 int status = -ENOMEM;
1da177e4
LT		 2884
2885 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2886 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
57dc9a57
TM		 2887
2888 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
2889 if (data == NULL)
2890 goto out;
2891
1da177e4 2892 if (S_ISFIFO(mode))
57dc9a57 2893 data->arg.ftype = NF4FIFO;
1da177e4 2894 else if (S_ISBLK(mode)) {
57dc9a57
TM		 2895 data->arg.ftype = NF4BLK;
2896 data->arg.u.device.specdata1 = MAJOR(rdev);
2897 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 2898 }
2899 else if (S_ISCHR(mode)) {
57dc9a57
TM		 2900 data->arg.ftype = NF4CHR;
2901 data->arg.u.device.specdata1 = MAJOR(rdev);
2902 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4 2903 }
1da177e4 2904
57dc9a57
TM		 2905 status = nfs4_do_create(dir, dentry, data);
2906
2907 nfs4_free_createdata(data);
2908out:
1da177e4
LT		 2909 return status;
2910}
2911
2912static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2913 struct iattr *sattr, dev_t rdev)
2914{
2915 struct nfs4_exception exception = { };
2916 int err;
2917 do {
2918 err = nfs4_handle_exception(NFS_SERVER(dir),
2919 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2920 &exception);
2921 } while (exception.retry);
2922 return err;
2923}
2924
2925static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2926 struct nfs_fsstat *fsstat)
2927{
2928 struct nfs4_statfs_arg args = {
2929 .fh = fhandle,
2930 .bitmask = server->attr_bitmask,
2931 };
24ad148a
BH		 2932 struct nfs4_statfs_res res = {
2933 .fsstat = fsstat,
2934 };
1da177e4
LT		 2935 struct rpc_message msg = {
2936 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2937 .rpc_argp = &args,
24ad148a 2938 .rpc_resp = &res,
1da177e4
LT		 2939 };
2940
0e574af1 2941 nfs_fattr_init(fsstat->fattr);
cccef3b9 2942 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2943}
2944
2945static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2946{
2947 struct nfs4_exception exception = { };
2948 int err;
2949 do {
2950 err = nfs4_handle_exception(server,
2951 _nfs4_proc_statfs(server, fhandle, fsstat),
2952 &exception);
2953 } while (exception.retry);
2954 return err;
2955}
2956
2957static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2958 struct nfs_fsinfo *fsinfo)
2959{
2960 struct nfs4_fsinfo_arg args = {
2961 .fh = fhandle,
2962 .bitmask = server->attr_bitmask,
2963 };
3dda5e43
BH		 2964 struct nfs4_fsinfo_res res = {
2965 .fsinfo = fsinfo,
2966 };
1da177e4
LT		 2967 struct rpc_message msg = {
2968 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2969 .rpc_argp = &args,
3dda5e43 2970 .rpc_resp = &res,
1da177e4
LT		 2971 };
2972
cccef3b9 2973 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2974}
2975
2976static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2977{
2978 struct nfs4_exception exception = { };
2979 int err;
2980
2981 do {
2982 err = nfs4_handle_exception(server,
2983 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2984 &exception);
2985 } while (exception.retry);
2986 return err;
2987}
2988
2989static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2990{
0e574af1 2991 nfs_fattr_init(fsinfo->fattr);
1da177e4
LT		 2992 return nfs4_do_fsinfo(server, fhandle, fsinfo);
2993}
2994
2995static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2996 struct nfs_pathconf *pathconf)
2997{
2998 struct nfs4_pathconf_arg args = {
2999 .fh = fhandle,
3000 .bitmask = server->attr_bitmask,
3001 };
d45b2989
BH		 3002 struct nfs4_pathconf_res res = {
3003 .pathconf = pathconf,
3004 };
1da177e4
LT		 3005 struct rpc_message msg = {
3006 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3007 .rpc_argp = &args,
d45b2989 3008 .rpc_resp = &res,
1da177e4
LT		 3009 };
3010
3011 /* None of the pathconf attributes are mandatory to implement */
3012 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3013 memset(pathconf, 0, sizeof(*pathconf));
3014 return 0;
3015 }
3016
0e574af1 3017 nfs_fattr_init(pathconf->fattr);
cccef3b9 3018 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 3019}
3020
3021static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3022 struct nfs_pathconf *pathconf)
3023{
3024 struct nfs4_exception exception = { };
3025 int err;
3026
3027 do {
3028 err = nfs4_handle_exception(server,
3029 _nfs4_proc_pathconf(server, fhandle, pathconf),
3030 &exception);
3031 } while (exception.retry);
3032 return err;
3033}
3034
ec06c096 3035static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3036{
ec06c096 3037 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 3038
f11c88af
AA		 3039 dprintk("--> %s\n", __func__);
3040
14516c3a
TM		 3041 if (!nfs4_sequence_done(task, &data->res.seq_res))
3042 return -EAGAIN;
f11c88af 3043
9e33bed5 3044 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
0110ee15 3045 nfs_restart_rpc(task, server->nfs_client);
ec06c096 3046 return -EAGAIN;
1da177e4 3047 }
8850df99
TM		 3048
3049 nfs_invalidate_atime(data->inode);
1da177e4 3050 if (task->tk_status > 0)
ec06c096
TM		 3051 renew_lease(server, data->timestamp);
3052 return 0;
1da177e4
LT		 3053}
3054
bdc7f021 3055static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3056{
1da177e4 3057 data->timestamp = jiffies;
bdc7f021 3058 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
1da177e4
LT		 3059}
3060
788e7a89 3061static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3062{
1da177e4
LT		 3063 struct inode *inode = data->inode;
3064
14516c3a
TM		 3065 if (!nfs4_sequence_done(task, &data->res.seq_res))
3066 return -EAGAIN;
def6ed7e 3067
9e33bed5 3068 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
0110ee15 3069 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 3070 return -EAGAIN;
1da177e4 3071 }
4f9838c7 3072 if (task->tk_status >= 0) {
1da177e4 3073 renew_lease(NFS_SERVER(inode), data->timestamp);
70ca8852 3074 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
4f9838c7 3075 }
788e7a89 3076 return 0;
1da177e4
LT		 3077}
3078
bdc7f021 3079static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3080{
bdc7f021
TM		 3081 struct nfs_server *server = NFS_SERVER(data->inode);
3082
a65318bf 3083 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 3084 data->res.server = server;
1da177e4
LT		 3085 data->timestamp = jiffies;
3086
bdc7f021 3087 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
1da177e4
LT		 3088}
3089
788e7a89 3090static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3091{
1da177e4
LT		 3092 struct inode *inode = data->inode;
3093
14516c3a
TM		 3094 if (!nfs4_sequence_done(task, &data->res.seq_res))
3095 return -EAGAIN;
3096
9e33bed5 3097 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
0110ee15 3098 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 3099 return -EAGAIN;
1da177e4 3100 }
9e08a3c5 3101 nfs_refresh_inode(inode, data->res.fattr);
788e7a89 3102 return 0;
1da177e4
LT		 3103}
3104
bdc7f021 3105static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3106{
788e7a89 3107 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 3108
a65318bf 3109 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 3110 data->res.server = server;
bdc7f021 3111 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
1da177e4
LT		 3112}
3113
9bc4e3ca
CL		 3114struct nfs4_renewdata {
3115 struct nfs_client *client;
3116 unsigned long timestamp;
3117};
3118
1da177e4
LT		 3119/*
3120 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3121 * standalone procedure for queueing an asynchronous RENEW.
3122 */
9bc4e3ca 3123static void nfs4_renew_release(void *calldata)
dc96aef9 3124{
9bc4e3ca
CL		 3125 struct nfs4_renewdata *data = calldata;
3126 struct nfs_client *clp = data->client;
dc96aef9 3127
0851de06
AB		 3128 if (atomic_read(&clp->cl_count) > 1)
3129 nfs4_schedule_state_renewal(clp);
3130 nfs_put_client(clp);
9bc4e3ca 3131 kfree(data);
dc96aef9
AB		 3132}
3133
9bc4e3ca 3134static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 3135{
9bc4e3ca
CL		 3136 struct nfs4_renewdata *data = calldata;
3137 struct nfs_client *clp = data->client;
3138 unsigned long timestamp = data->timestamp;
1da177e4
LT		 3139
3140 if (task->tk_status < 0) {
95baa25c
TM		 3141 /* Unless we're shutting down, schedule state recovery! */
3142 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0)
3143 nfs4_schedule_state_recovery(clp);
1da177e4
LT		 3144 return;
3145 }
452e9352 3146 do_renew_lease(clp, timestamp);
1da177e4
LT		 3147}
3148
963d8fe5
TM		 3149static const struct rpc_call_ops nfs4_renew_ops = {
3150 .rpc_call_done = nfs4_renew_done,
dc96aef9 3151 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 3152};
3153
adfa6f98 3154int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3155{
3156 struct rpc_message msg = {
3157 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3158 .rpc_argp = clp,
b4454fe1 3159 .rpc_cred = cred,
1da177e4 3160 };
9bc4e3ca 3161 struct nfs4_renewdata *data;
1da177e4 3162
0851de06
AB		 3163 if (!atomic_inc_not_zero(&clp->cl_count))
3164 return -EIO;
9bc4e3ca
CL		 3165 data = kmalloc(sizeof(*data), GFP_KERNEL);
3166 if (data == NULL)
3167 return -ENOMEM;
3168 data->client = clp;
3169 data->timestamp = jiffies;
1da177e4 3170 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
9bc4e3ca 3171 &nfs4_renew_ops, data);
1da177e4
LT		 3172}
3173
adfa6f98 3174int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3175{
3176 struct rpc_message msg = {
3177 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3178 .rpc_argp = clp,
b4454fe1 3179 .rpc_cred = cred,
1da177e4
LT		 3180 };
3181 unsigned long now = jiffies;
3182 int status;
3183
3184 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3185 if (status < 0)
3186 return status;
452e9352 3187 do_renew_lease(clp, now);
1da177e4
LT		 3188 return 0;
3189}
3190
aa1870af
BF		 3191static inline int nfs4_server_supports_acls(struct nfs_server *server)
3192{
3193 return (server->caps & NFS_CAP_ACLS)
3194 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3195 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3196}
3197
3198/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3199 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3200 * the stack.
3201 */
3202#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3203
3204static void buf_to_pages(const void *buf, size_t buflen,
3205 struct page **pages, unsigned int *pgbase)
3206{
3207 const void *p = buf;
3208
3209 *pgbase = offset_in_page(buf);
3210 p -= *pgbase;
3211 while (p < buf + buflen) {
3212 *(pages++) = virt_to_page(p);
3213 p += PAGE_CACHE_SIZE;
3214 }
3215}
3216
e50a1c2e
BF		 3217struct nfs4_cached_acl {
3218 int cached;
3219 size_t len;
3e9d4154 3220 char data[0];
e50a1c2e
BF		 3221};
3222
3223static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3224{
3225 struct nfs_inode *nfsi = NFS_I(inode);
3226
3227 spin_lock(&inode->i_lock);
3228 kfree(nfsi->nfs4_acl);
3229 nfsi->nfs4_acl = acl;
3230 spin_unlock(&inode->i_lock);
3231}
3232
3233static void nfs4_zap_acl_attr(struct inode *inode)
3234{
3235 nfs4_set_cached_acl(inode, NULL);
3236}
3237
3238static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3239{
3240 struct nfs_inode *nfsi = NFS_I(inode);
3241 struct nfs4_cached_acl *acl;
3242 int ret = -ENOENT;
3243
3244 spin_lock(&inode->i_lock);
3245 acl = nfsi->nfs4_acl;
3246 if (acl == NULL)
3247 goto out;
3248 if (buf == NULL) /* user is just asking for length */
3249 goto out_len;
3250 if (acl->cached == 0)
3251 goto out;
3252 ret = -ERANGE; /* see getxattr(2) man page */
3253 if (acl->len > buflen)
3254 goto out;
3255 memcpy(buf, acl->data, acl->len);
3256out_len:
3257 ret = acl->len;
3258out:
3259 spin_unlock(&inode->i_lock);
3260 return ret;
3261}
3262
3263static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3264{
3265 struct nfs4_cached_acl *acl;
3266
3267 if (buf && acl_len <= PAGE_SIZE) {
3268 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3269 if (acl == NULL)
3270 goto out;
3271 acl->cached = 1;
3272 memcpy(acl->data, buf, acl_len);
3273 } else {
3274 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3275 if (acl == NULL)
3276 goto out;
3277 acl->cached = 0;
3278 }
3279 acl->len = acl_len;
3280out:
3281 nfs4_set_cached_acl(inode, acl);
3282}
3283
16b4289c 3284static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3285{
aa1870af
BF		 3286 struct page *pages[NFS4ACL_MAXPAGES];
3287 struct nfs_getaclargs args = {
3288 .fh = NFS_FH(inode),
3289 .acl_pages = pages,
3290 .acl_len = buflen,
3291 };
663c79b3
BH		 3292 struct nfs_getaclres res = {
3293 .acl_len = buflen,
3294 };
e50a1c2e 3295 void *resp_buf;
aa1870af
BF		 3296 struct rpc_message msg = {
3297 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3298 .rpc_argp = &args,
663c79b3 3299 .rpc_resp = &res,
aa1870af 3300 };
e50a1c2e 3301 struct page *localpage = NULL;
aa1870af
BF		 3302 int ret;
3303
e50a1c2e
BF		 3304 if (buflen < PAGE_SIZE) {
3305 /* As long as we're doing a round trip to the server anyway,
3306 * let's be prepared for a page of acl data. */
3307 localpage = alloc_page(GFP_KERNEL);
3308 resp_buf = page_address(localpage);
3309 if (localpage == NULL)
3310 return -ENOMEM;
3311 args.acl_pages[0] = localpage;
3312 args.acl_pgbase = 0;
663c79b3 3313 args.acl_len = PAGE_SIZE;
e50a1c2e
BF		 3314 } else {
3315 resp_buf = buf;
3316 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
3317 }
cccef3b9 3318 ret = nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
e50a1c2e
BF		 3319 if (ret)
3320 goto out_free;
663c79b3
BH		 3321 if (res.acl_len > args.acl_len)
3322 nfs4_write_cached_acl(inode, NULL, res.acl_len);
e50a1c2e 3323 else
663c79b3 3324 nfs4_write_cached_acl(inode, resp_buf, res.acl_len);
e50a1c2e
BF		 3325 if (buf) {
3326 ret = -ERANGE;
663c79b3 3327 if (res.acl_len > buflen)
e50a1c2e
BF		 3328 goto out_free;
3329 if (localpage)
663c79b3 3330 memcpy(buf, resp_buf, res.acl_len);
e50a1c2e 3331 }
663c79b3 3332 ret = res.acl_len;
e50a1c2e
BF		 3333out_free:
3334 if (localpage)
3335 __free_page(localpage);
aa1870af
BF		 3336 return ret;
3337}
3338
16b4289c
TM		 3339static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3340{
3341 struct nfs4_exception exception = { };
3342 ssize_t ret;
3343 do {
3344 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3345 if (ret >= 0)
3346 break;
3347 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3348 } while (exception.retry);
3349 return ret;
3350}
3351
e50a1c2e
BF		 3352static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3353{
3354 struct nfs_server *server = NFS_SERVER(inode);
3355 int ret;
3356
3357 if (!nfs4_server_supports_acls(server))
3358 return -EOPNOTSUPP;
3359 ret = nfs_revalidate_inode(server, inode);
3360 if (ret < 0)
3361 return ret;
3362 ret = nfs4_read_cached_acl(inode, buf, buflen);
3363 if (ret != -ENOENT)
3364 return ret;
3365 return nfs4_get_acl_uncached(inode, buf, buflen);
3366}
3367
16b4289c 3368static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 3369{
3370 struct nfs_server *server = NFS_SERVER(inode);
3371 struct page *pages[NFS4ACL_MAXPAGES];
3372 struct nfs_setaclargs arg = {
3373 .fh = NFS_FH(inode),
3374 .acl_pages = pages,
3375 .acl_len = buflen,
3376 };
73c403a9 3377 struct nfs_setaclres res;
4b580ee3
BF		 3378 struct rpc_message msg = {
3379 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3380 .rpc_argp = &arg,
73c403a9 3381 .rpc_resp = &res,
4b580ee3
BF		 3382 };
3383 int ret;
3384
3385 if (!nfs4_server_supports_acls(server))
3386 return -EOPNOTSUPP;
642ac549 3387 nfs_inode_return_delegation(inode);
4b580ee3 3388 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
cccef3b9 3389 ret = nfs4_call_sync(server, &msg, &arg, &res, 1);
f41f7418
TM		 3390 nfs_access_zap_cache(inode);
3391 nfs_zap_acl_cache(inode);
4b580ee3
BF		 3392 return ret;
3393}
3394
16b4289c
TM		 3395static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3396{
3397 struct nfs4_exception exception = { };
3398 int err;
3399 do {
3400 err = nfs4_handle_exception(NFS_SERVER(inode),
3401 __nfs4_proc_set_acl(inode, buf, buflen),
3402 &exception);
3403 } while (exception.retry);
3404 return err;
3405}
3406
1da177e4 3407static int
aa5190d0 3408nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 3409{
aa5190d0
TM		 3410 struct nfs_client *clp = server->nfs_client;
3411
3412 if (task->tk_status >= 0)
1da177e4
LT		 3413 return 0;
3414 switch(task->tk_status) {
9e33bed5
TM		 3415 case -NFS4ERR_ADMIN_REVOKED:
3416 case -NFS4ERR_BAD_STATEID:
3417 case -NFS4ERR_OPENMODE:
3418 if (state == NULL)
3419 break;
3420 nfs4_state_mark_reclaim_nograce(clp, state);
a2c0b9e2 3421 goto do_state_recovery;
1da177e4 3422 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 3423 case -NFS4ERR_STALE_CLIENTID:
1da177e4 3424 case -NFS4ERR_EXPIRED:
a2c0b9e2 3425 goto do_state_recovery;
4745e315
AA		 3426#if defined(CONFIG_NFS_V4_1)
3427 case -NFS4ERR_BADSESSION:
3428 case -NFS4ERR_BADSLOT:
3429 case -NFS4ERR_BAD_HIGH_SLOT:
3430 case -NFS4ERR_DEADSESSION:
3431 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3432 case -NFS4ERR_SEQ_FALSE_RETRY:
3433 case -NFS4ERR_SEQ_MISORDERED:
3434 dprintk("%s ERROR %d, Reset session\n", __func__,
3435 task->tk_status);
0b9e2d41 3436 nfs4_schedule_state_recovery(clp);
4745e315
AA		 3437 task->tk_status = 0;
3438 return -EAGAIN;
3439#endif /* CONFIG_NFS_V4_1 */
1da177e4 3440 case -NFS4ERR_DELAY:
aa5190d0 3441 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 3442 case -NFS4ERR_GRACE:
2c643488 3443 case -EKEYEXPIRED:
1da177e4
LT		 3444 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3445 task->tk_status = 0;
3446 return -EAGAIN;
3447 case -NFS4ERR_OLD_STATEID:
3448 task->tk_status = 0;
3449 return -EAGAIN;
3450 }
3451 task->tk_status = nfs4_map_errors(task->tk_status);
3452 return 0;
a2c0b9e2
TM		 3453do_state_recovery:
3454 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
3455 nfs4_schedule_state_recovery(clp);
3456 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3457 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3458 task->tk_status = 0;
3459 return -EAGAIN;
1da177e4
LT		 3460}
3461
bb8b27e5
TM		 3462int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
3463 unsigned short port, struct rpc_cred *cred,
3464 struct nfs4_setclientid_res *res)
1da177e4
LT		 3465{
3466 nfs4_verifier sc_verifier;
3467 struct nfs4_setclientid setclientid = {
3468 .sc_verifier = &sc_verifier,
3469 .sc_prog = program,
3470 };
3471 struct rpc_message msg = {
3472 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3473 .rpc_argp = &setclientid,
bb8b27e5 3474 .rpc_resp = res,
286d7d6a 3475 .rpc_cred = cred,
1da177e4 3476 };
bc4785cd 3477 __be32 *p;
1da177e4
LT		 3478 int loop = 0;
3479 int status;
3480
bc4785cd 3481 p = (__be32*)sc_verifier.data;
1da177e4
LT		 3482 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3483 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3484
3485 for(;;) {
3486 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
69dd716c 3487 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
d4d3c507
CL		 3488 clp->cl_ipaddr,
3489 rpc_peeraddr2str(clp->cl_rpcclient,
3490 RPC_DISPLAY_ADDR),
69dd716c
TM		 3491 rpc_peeraddr2str(clp->cl_rpcclient,
3492 RPC_DISPLAY_PROTO),
78ea323b 3493 clp->cl_rpcclient->cl_auth->au_ops->au_name,
1da177e4
LT		 3494 clp->cl_id_uniquifier);
3495 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 3496 sizeof(setclientid.sc_netid),
3497 rpc_peeraddr2str(clp->cl_rpcclient,
3498 RPC_DISPLAY_NETID));
1da177e4 3499 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 3500 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 3501 clp->cl_ipaddr, port >> 8, port & 255);
3502
3503 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3504 if (status != -NFS4ERR_CLID_INUSE)
3505 break;
3506 if (signalled())
3507 break;
3508 if (loop++ & 1)
3509 ssleep(clp->cl_lease_time + 1);
3510 else
3511 if (++clp->cl_id_uniquifier == 0)
3512 break;
3513 }
3514 return status;
3515}
3516
bb8b27e5
TM		 3517static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp,
3518 struct nfs4_setclientid_res *arg,
3519 struct rpc_cred *cred)
1da177e4
LT		 3520{
3521 struct nfs_fsinfo fsinfo;
3522 struct rpc_message msg = {
3523 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 3524 .rpc_argp = arg,
1da177e4 3525 .rpc_resp = &fsinfo,
286d7d6a 3526 .rpc_cred = cred,
1da177e4
LT		 3527 };
3528 unsigned long now;
3529 int status;
3530
3531 now = jiffies;
3532 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3533 if (status == 0) {
3534 spin_lock(&clp->cl_lock);
3535 clp->cl_lease_time = fsinfo.lease_time * HZ;
3536 clp->cl_last_renewal = now;
3537 spin_unlock(&clp->cl_lock);
3538 }
3539 return status;
3540}
3541
bb8b27e5
TM		 3542int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
3543 struct nfs4_setclientid_res *arg,
3544 struct rpc_cred *cred)
51581f3b 3545{
77e03677 3546 long timeout = 0;
51581f3b
TM		 3547 int err;
3548 do {
bb8b27e5 3549 err = _nfs4_proc_setclientid_confirm(clp, arg, cred);
51581f3b
TM		 3550 switch (err) {
3551 case 0:
3552 return err;
3553 case -NFS4ERR_RESOURCE:
3554 /* The IBM lawyers misread another document! */
3555 case -NFS4ERR_DELAY:
3556 err = nfs4_delay(clp->cl_rpcclient, &timeout);
3557 }
3558 } while (err == 0);
3559 return err;
3560}
3561
fe650407
TM		 3562struct nfs4_delegreturndata {
3563 struct nfs4_delegreturnargs args;
fa178f29 3564 struct nfs4_delegreturnres res;
fe650407
TM		 3565 struct nfs_fh fh;
3566 nfs4_stateid stateid;
26e976a8 3567 unsigned long timestamp;
fa178f29 3568 struct nfs_fattr fattr;
fe650407
TM		 3569 int rpc_status;
3570};
3571
fe650407
TM		 3572static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3573{
3574 struct nfs4_delegreturndata *data = calldata;
938e1010 3575
14516c3a
TM		 3576 if (!nfs4_sequence_done(task, &data->res.seq_res))
3577 return;
938e1010 3578
79708861
RL		 3579 switch (task->tk_status) {
3580 case -NFS4ERR_STALE_STATEID:
3581 case -NFS4ERR_EXPIRED:
3582 case 0:
fa178f29 3583 renew_lease(data->res.server, data->timestamp);
79708861
RL		 3584 break;
3585 default:
3586 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
3587 -EAGAIN) {
3588 nfs_restart_rpc(task, data->res.server->nfs_client);
3589 return;
3590 }
3591 }
3592 data->rpc_status = task->tk_status;
fe650407
TM		 3593}
3594
3595static void nfs4_delegreturn_release(void *calldata)
3596{
fe650407
TM		 3597 kfree(calldata);
3598}
3599
938e1010
AA		 3600#if defined(CONFIG_NFS_V4_1)
3601static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3602{
3603 struct nfs4_delegreturndata *d_data;
3604
3605 d_data = (struct nfs4_delegreturndata *)data;
3606
035168ab 3607 if (nfs4_setup_sequence(d_data->res.server,
938e1010
AA		 3608 &d_data->args.seq_args,
3609 &d_data->res.seq_res, 1, task))
3610 return;
3611 rpc_call_start(task);
3612}
3613#endif /* CONFIG_NFS_V4_1 */
3614
c8d149f3 3615static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 3616#if defined(CONFIG_NFS_V4_1)
3617 .rpc_call_prepare = nfs4_delegreturn_prepare,
3618#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 3619 .rpc_call_done = nfs4_delegreturn_done,
3620 .rpc_release = nfs4_delegreturn_release,
3621};
3622
e6f81075 3623static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 3624{
3625 struct nfs4_delegreturndata *data;
fa178f29 3626 struct nfs_server *server = NFS_SERVER(inode);
fe650407 3627 struct rpc_task *task;
5138fde0
TM		 3628 struct rpc_message msg = {
3629 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3630 .rpc_cred = cred,
3631 };
c970aa85
TM		 3632 struct rpc_task_setup task_setup_data = {
3633 .rpc_client = server->client,
5138fde0 3634 .rpc_message = &msg,
c970aa85
TM		 3635 .callback_ops = &nfs4_delegreturn_ops,
3636 .flags = RPC_TASK_ASYNC,
3637 };
e6f81075 3638 int status = 0;
fe650407 3639
8535b2be 3640 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 3641 if (data == NULL)
3642 return -ENOMEM;
3643 data->args.fhandle = &data->fh;
3644 data->args.stateid = &data->stateid;
fa178f29 3645 data->args.bitmask = server->attr_bitmask;
fe650407
TM		 3646 nfs_copy_fh(&data->fh, NFS_FH(inode));
3647 memcpy(&data->stateid, stateid, sizeof(data->stateid));
fa178f29
TM		 3648 data->res.fattr = &data->fattr;
3649 data->res.server = server;
5138fde0 3650 nfs_fattr_init(data->res.fattr);
26e976a8 3651 data->timestamp = jiffies;
fe650407
TM		 3652 data->rpc_status = 0;
3653
c970aa85 3654 task_setup_data.callback_data = data;
5138fde0
TM		 3655 msg.rpc_argp = &data->args,
3656 msg.rpc_resp = &data->res,
c970aa85 3657 task = rpc_run_task(&task_setup_data);
7a1218a2 3658 if (IS_ERR(task))
fe650407 3659 return PTR_ERR(task);
e6f81075
TM		 3660 if (!issync)
3661 goto out;
fe650407 3662 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 3663 if (status != 0)
3664 goto out;
3665 status = data->rpc_status;
3666 if (status != 0)
3667 goto out;
3668 nfs_refresh_inode(inode, &data->fattr);
3669out:
e6b3c4db 3670 rpc_put_task(task);
fe650407 3671 return status;
1da177e4
LT		 3672}
3673
e6f81075 3674int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 3675{
3676 struct nfs_server *server = NFS_SERVER(inode);
3677 struct nfs4_exception exception = { };
3678 int err;
3679 do {
e6f81075 3680 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 3681 switch (err) {
3682 case -NFS4ERR_STALE_STATEID:
3683 case -NFS4ERR_EXPIRED:
1da177e4
LT		 3684 case 0:
3685 return 0;
3686 }
3687 err = nfs4_handle_exception(server, err, &exception);
3688 } while (exception.retry);
3689 return err;
3690}
3691
3692#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3693#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3694
3695/*
3696 * sleep, with exponential backoff, and retry the LOCK operation.
3697 */
3698static unsigned long
3699nfs4_set_lock_task_retry(unsigned long timeout)
3700{
150030b7 3701 schedule_timeout_killable(timeout);
1da177e4
LT		 3702 timeout <<= 1;
3703 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3704 return NFS4_LOCK_MAXTIMEOUT;
3705 return timeout;
3706}
3707
1da177e4
LT		 3708static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3709{
3710 struct inode *inode = state->inode;
3711 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 3712 struct nfs_client *clp = server->nfs_client;
911d1aaf 3713 struct nfs_lockt_args arg = {
1da177e4 3714 .fh = NFS_FH(inode),
911d1aaf 3715 .fl = request,
1da177e4 3716 };
911d1aaf
TM		 3717 struct nfs_lockt_res res = {
3718 .denied = request,
1da177e4
LT		 3719 };
3720 struct rpc_message msg = {
3721 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3722 .rpc_argp = &arg,
3723 .rpc_resp = &res,
3724 .rpc_cred = state->owner->so_cred,
3725 };
1da177e4
LT		 3726 struct nfs4_lock_state *lsp;
3727 int status;
3728
911d1aaf 3729 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 3730 status = nfs4_set_lock_state(state, request);
3731 if (status != 0)
3732 goto out;
3733 lsp = request->fl_u.nfs4_fl.owner;
9f958ab8 3734 arg.lock_owner.id = lsp->ls_id.id;
cccef3b9 3735 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
911d1aaf
TM		 3736 switch (status) {
3737 case 0:
3738 request->fl_type = F_UNLCK;
3739 break;
3740 case -NFS4ERR_DENIED:
3741 status = 0;
1da177e4 3742 }
70cc6487 3743 request->fl_ops->fl_release_private(request);
8d0a8a9d 3744out:
1da177e4
LT		 3745 return status;
3746}
3747
3748static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3749{
3750 struct nfs4_exception exception = { };
3751 int err;
3752
3753 do {
3754 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3755 _nfs4_proc_getlk(state, cmd, request),
3756 &exception);
3757 } while (exception.retry);
3758 return err;
3759}
3760
3761static int do_vfs_lock(struct file *file, struct file_lock *fl)
3762{
3763 int res = 0;
3764 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3765 case FL_POSIX:
3766 res = posix_lock_file_wait(file, fl);
3767 break;
3768 case FL_FLOCK:
3769 res = flock_lock_file_wait(file, fl);
3770 break;
3771 default:
3772 BUG();
3773 }
1da177e4
LT		 3774 return res;
3775}
3776
faf5f49c 3777struct nfs4_unlockdata {
911d1aaf
TM		 3778 struct nfs_locku_args arg;
3779 struct nfs_locku_res res;
faf5f49c
TM		 3780 struct nfs4_lock_state *lsp;
3781 struct nfs_open_context *ctx;
911d1aaf
TM		 3782 struct file_lock fl;
3783 const struct nfs_server *server;
26e976a8 3784 unsigned long timestamp;
faf5f49c
TM		 3785};
3786
911d1aaf
TM		 3787static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3788 struct nfs_open_context *ctx,
3789 struct nfs4_lock_state *lsp,
3790 struct nfs_seqid *seqid)
3791{
3792 struct nfs4_unlockdata *p;
3793 struct inode *inode = lsp->ls_state->inode;
3794
8535b2be 3795 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 3796 if (p == NULL)
3797 return NULL;
3798 p->arg.fh = NFS_FH(inode);
3799 p->arg.fl = &p->fl;
3800 p->arg.seqid = seqid;
c1d51931 3801 p->res.seqid = seqid;
911d1aaf
TM		 3802 p->arg.stateid = &lsp->ls_stateid;
3803 p->lsp = lsp;
3804 atomic_inc(&lsp->ls_count);
3805 /* Ensure we don't close file until we're done freeing locks! */
3806 p->ctx = get_nfs_open_context(ctx);
3807 memcpy(&p->fl, fl, sizeof(p->fl));
3808 p->server = NFS_SERVER(inode);
3809 return p;
3810}
3811
06f814a3 3812static void nfs4_locku_release_calldata(void *data)
faf5f49c 3813{
963d8fe5 3814 struct nfs4_unlockdata *calldata = data;
911d1aaf 3815 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 3816 nfs4_put_lock_state(calldata->lsp);
3817 put_nfs_open_context(calldata->ctx);
3818 kfree(calldata);
faf5f49c
TM		 3819}
3820
963d8fe5 3821static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 3822{
963d8fe5 3823 struct nfs4_unlockdata *calldata = data;
faf5f49c 3824
14516c3a
TM		 3825 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
3826 return;
faf5f49c
TM		 3827 switch (task->tk_status) {
3828 case 0:
3829 memcpy(calldata->lsp->ls_stateid.data,
911d1aaf 3830 calldata->res.stateid.data,
faf5f49c 3831 sizeof(calldata->lsp->ls_stateid.data));
26e976a8 3832 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 3833 break;
9e33bed5
TM		 3834 case -NFS4ERR_BAD_STATEID:
3835 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 3836 case -NFS4ERR_STALE_STATEID:
3837 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 3838 break;
3839 default:
9e33bed5 3840 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
0110ee15 3841 nfs_restart_rpc(task,
d61e612a 3842 calldata->server->nfs_client);
faf5f49c 3843 }
faf5f49c
TM		 3844}
3845
4ce70ada 3846static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 3847{
4ce70ada 3848 struct nfs4_unlockdata *calldata = data;
faf5f49c 3849
911d1aaf 3850 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM		 3851 return;
3852 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM		 3853 /* Note: exit _without_ running nfs4_locku_done */
3854 task->tk_action = NULL;
faf5f49c
TM		 3855 return;
3856 }
26e976a8 3857 calldata->timestamp = jiffies;
035168ab 3858 if (nfs4_setup_sequence(calldata->server,
a893693c
AA		 3859 &calldata->arg.seq_args,
3860 &calldata->res.seq_res, 1, task))
3861 return;
5138fde0 3862 rpc_call_start(task);
faf5f49c
TM		 3863}
3864
963d8fe5 3865static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 3866 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 3867 .rpc_call_done = nfs4_locku_done,
06f814a3 3868 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 3869};
3870
a5d16a4d
TM		 3871static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3872 struct nfs_open_context *ctx,
3873 struct nfs4_lock_state *lsp,
3874 struct nfs_seqid *seqid)
3875{
3876 struct nfs4_unlockdata *data;
5138fde0
TM		 3877 struct rpc_message msg = {
3878 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3879 .rpc_cred = ctx->cred,
3880 };
c970aa85
TM		 3881 struct rpc_task_setup task_setup_data = {
3882 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 3883 .rpc_message = &msg,
c970aa85 3884 .callback_ops = &nfs4_locku_ops,
101070ca 3885 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3886 .flags = RPC_TASK_ASYNC,
3887 };
a5d16a4d 3888
137d6aca
FF		 3889 /* Ensure this is an unlock - when canceling a lock, the
3890 * canceled lock is passed in, and it won't be an unlock.
3891 */
3892 fl->fl_type = F_UNLCK;
3893
a5d16a4d
TM		 3894 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3895 if (data == NULL) {
3896 nfs_free_seqid(seqid);
3897 return ERR_PTR(-ENOMEM);
3898 }
3899
5138fde0
TM		 3900 msg.rpc_argp = &data->arg,
3901 msg.rpc_resp = &data->res,
c970aa85
TM		 3902 task_setup_data.callback_data = data;
3903 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 3904}
3905
faf5f49c
TM		 3906static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3907{
19e03c57 3908 struct nfs_inode *nfsi = NFS_I(state->inode);
911d1aaf 3909 struct nfs_seqid *seqid;
1da177e4 3910 struct nfs4_lock_state *lsp;
06f814a3
TM		 3911 struct rpc_task *task;
3912 int status = 0;
536ff0f8 3913 unsigned char fl_flags = request->fl_flags;
faf5f49c 3914
8d0a8a9d 3915 status = nfs4_set_lock_state(state, request);
9b073574
TM		 3916 /* Unlock _before_ we do the RPC call */
3917 request->fl_flags |= FL_EXISTS;
19e03c57
TM		 3918 down_read(&nfsi->rwsem);
3919 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
3920 up_read(&nfsi->rwsem);
9b073574 3921 goto out;
19e03c57
TM		 3922 }
3923 up_read(&nfsi->rwsem);
8d0a8a9d 3924 if (status != 0)
9b073574
TM		 3925 goto out;
3926 /* Is this a delegated lock? */
3927 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3928 goto out;
8d0a8a9d 3929 lsp = request->fl_u.nfs4_fl.owner;
8535b2be 3930 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 3931 status = -ENOMEM;
911d1aaf 3932 if (seqid == NULL)
9b073574 3933 goto out;
cd3758e3 3934 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 3935 status = PTR_ERR(task);
3936 if (IS_ERR(task))
9b073574 3937 goto out;
a5d16a4d 3938 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 3939 rpc_put_task(task);
9b073574 3940out:
536ff0f8 3941 request->fl_flags = fl_flags;
1da177e4
LT		 3942 return status;
3943}
3944
a5d16a4d
TM		 3945struct nfs4_lockdata {
3946 struct nfs_lock_args arg;
3947 struct nfs_lock_res res;
3948 struct nfs4_lock_state *lsp;
3949 struct nfs_open_context *ctx;
3950 struct file_lock fl;
26e976a8 3951 unsigned long timestamp;
a5d16a4d
TM		 3952 int rpc_status;
3953 int cancelled;
66179efe 3954 struct nfs_server *server;
a5d16a4d
TM		 3955};
3956
3957static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 3958 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
3959 gfp_t gfp_mask)
1da177e4 3960{
a5d16a4d
TM		 3961 struct nfs4_lockdata *p;
3962 struct inode *inode = lsp->ls_state->inode;
1da177e4 3963 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 3964
8535b2be 3965 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 3966 if (p == NULL)
3967 return NULL;
3968
3969 p->arg.fh = NFS_FH(inode);
3970 p->arg.fl = &p->fl;
8535b2be 3971 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 3972 if (p->arg.open_seqid == NULL)
3973 goto out_free;
8535b2be 3974 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 3975 if (p->arg.lock_seqid == NULL)
2f74c0a0 3976 goto out_free_seqid;
a5d16a4d 3977 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 3978 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
9f958ab8 3979 p->arg.lock_owner.id = lsp->ls_id.id;
c1d51931 3980 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 3981 p->lsp = lsp;
66179efe 3982 p->server = server;
a5d16a4d
TM		 3983 atomic_inc(&lsp->ls_count);
3984 p->ctx = get_nfs_open_context(ctx);
3985 memcpy(&p->fl, fl, sizeof(p->fl));
3986 return p;
2f74c0a0
TM		 3987out_free_seqid:
3988 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 3989out_free:
3990 kfree(p);
3991 return NULL;
3992}
3993
3994static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
3995{
3996 struct nfs4_lockdata *data = calldata;
3997 struct nfs4_state *state = data->lsp->ls_state;
06735b34 3998
3110ff80 3999 dprintk("%s: begin!\n", __func__);
2f74c0a0
TM		 4000 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4001 return;
a5d16a4d
TM		 4002 /* Do we need to do an open_to_lock_owner? */
4003 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
e6e21970
TM		 4004 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4005 return;
a5d16a4d
TM		 4006 data->arg.open_stateid = &state->stateid;
4007 data->arg.new_lock_owner = 1;
c1d51931 4008 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 4009 } else
4010 data->arg.new_lock_owner = 0;
26e976a8 4011 data->timestamp = jiffies;
035168ab
TM		 4012 if (nfs4_setup_sequence(data->server,
4013 &data->arg.seq_args,
66179efe
AA		 4014 &data->res.seq_res, 1, task))
4015 return;
5138fde0 4016 rpc_call_start(task);
3110ff80 4017 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
a5d16a4d
TM		 4018}
4019
b257957e
AB		 4020static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4021{
4022 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4023 nfs4_lock_prepare(task, calldata);
4024}
4025
a5d16a4d
TM		 4026static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4027{
4028 struct nfs4_lockdata *data = calldata;
4029
3110ff80 4030 dprintk("%s: begin!\n", __func__);
a5d16a4d 4031
14516c3a
TM		 4032 if (!nfs4_sequence_done(task, &data->res.seq_res))
4033 return;
66179efe 4034
a5d16a4d 4035 data->rpc_status = task->tk_status;
a5d16a4d 4036 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 4037 if (data->rpc_status == 0)
4038 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4039 else
4040 goto out;
4041 }
4042 if (data->rpc_status == 0) {
4043 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
4044 sizeof(data->lsp->ls_stateid.data));
4045 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
88be9f99 4046 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
a5d16a4d 4047 }
a5d16a4d 4048out:
3110ff80 4049 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 4050}
4051
4052static void nfs4_lock_release(void *calldata)
4053{
4054 struct nfs4_lockdata *data = calldata;
4055
3110ff80 4056 dprintk("%s: begin!\n", __func__);
2f74c0a0 4057 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 4058 if (data->cancelled != 0) {
4059 struct rpc_task *task;
4060 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4061 data->arg.lock_seqid);
4062 if (!IS_ERR(task))
e6b3c4db 4063 rpc_put_task(task);
3110ff80 4064 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 4065 } else
4066 nfs_free_seqid(data->arg.lock_seqid);
4067 nfs4_put_lock_state(data->lsp);
4068 put_nfs_open_context(data->ctx);
4069 kfree(data);
3110ff80 4070 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 4071}
4072
4073static const struct rpc_call_ops nfs4_lock_ops = {
4074 .rpc_call_prepare = nfs4_lock_prepare,
4075 .rpc_call_done = nfs4_lock_done,
4076 .rpc_release = nfs4_lock_release,
4077};
4078
b257957e
AB		 4079static const struct rpc_call_ops nfs4_recover_lock_ops = {
4080 .rpc_call_prepare = nfs4_recover_lock_prepare,
4081 .rpc_call_done = nfs4_lock_done,
4082 .rpc_release = nfs4_lock_release,
4083};
4084
2bee72a6
TM		 4085static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4086{
4087 struct nfs_client *clp = server->nfs_client;
4088 struct nfs4_state *state = lsp->ls_state;
4089
4090 switch (error) {
4091 case -NFS4ERR_ADMIN_REVOKED:
4092 case -NFS4ERR_BAD_STATEID:
4093 case -NFS4ERR_EXPIRED:
4094 if (new_lock_owner != 0 ||
4095 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
4096 nfs4_state_mark_reclaim_nograce(clp, state);
4097 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
a2c0b9e2
TM		 4098 break;
4099 case -NFS4ERR_STALE_STATEID:
4100 if (new_lock_owner != 0 ||
4101 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
4102 nfs4_state_mark_reclaim_reboot(clp, state);
4103 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6
TM		 4104 };
4105}
4106
afe6c27c 4107static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 4108{
4109 struct nfs4_lockdata *data;
4110 struct rpc_task *task;
5138fde0
TM		 4111 struct rpc_message msg = {
4112 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4113 .rpc_cred = state->owner->so_cred,
4114 };
c970aa85
TM		 4115 struct rpc_task_setup task_setup_data = {
4116 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4117 .rpc_message = &msg,
c970aa85 4118 .callback_ops = &nfs4_lock_ops,
101070ca 4119 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4120 .flags = RPC_TASK_ASYNC,
4121 };
a5d16a4d
TM		 4122 int ret;
4123
3110ff80 4124 dprintk("%s: begin!\n", __func__);
cd3758e3 4125 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 4126 fl->fl_u.nfs4_fl.owner,
4127 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 4128 if (data == NULL)
4129 return -ENOMEM;
4130 if (IS_SETLKW(cmd))
4131 data->arg.block = 1;
b257957e
AB		 4132 if (recovery_type > NFS_LOCK_NEW) {
4133 if (recovery_type == NFS_LOCK_RECLAIM)
afe6c27c 4134 data->arg.reclaim = NFS_LOCK_RECLAIM;
b257957e
AB		 4135 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4136 }
5138fde0
TM		 4137 msg.rpc_argp = &data->arg,
4138 msg.rpc_resp = &data->res,
c970aa85
TM		 4139 task_setup_data.callback_data = data;
4140 task = rpc_run_task(&task_setup_data);
7a1218a2 4141 if (IS_ERR(task))
a5d16a4d 4142 return PTR_ERR(task);
a5d16a4d
TM		 4143 ret = nfs4_wait_for_completion_rpc_task(task);
4144 if (ret == 0) {
4145 ret = data->rpc_status;
2bee72a6
TM		 4146 if (ret)
4147 nfs4_handle_setlk_error(data->server, data->lsp,
4148 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 4149 } else
4150 data->cancelled = 1;
e6b3c4db 4151 rpc_put_task(task);
3110ff80 4152 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 4153 return ret;
1da177e4
LT		 4154}
4155
4156static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4157{
202b50dc
TM		 4158 struct nfs_server *server = NFS_SERVER(state->inode);
4159 struct nfs4_exception exception = { };
4160 int err;
4161
4162 do {
42a2d13e
TM		 4163 /* Cache the lock if possible... */
4164 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4165 return 0;
afe6c27c 4166 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 4167 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 4168 break;
4169 nfs4_handle_exception(server, err, &exception);
4170 } while (exception.retry);
4171 return err;
1da177e4
LT		 4172}
4173
4174static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4175{
202b50dc
TM		 4176 struct nfs_server *server = NFS_SERVER(state->inode);
4177 struct nfs4_exception exception = { };
4178 int err;
4179
6bfc93ef
TM		 4180 err = nfs4_set_lock_state(state, request);
4181 if (err != 0)
4182 return err;
202b50dc 4183 do {
42a2d13e
TM		 4184 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4185 return 0;
afe6c27c 4186 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 4187 switch (err) {
4188 default:
4189 goto out;
4190 case -NFS4ERR_GRACE:
4191 case -NFS4ERR_DELAY:
4192 nfs4_handle_exception(server, err, &exception);
4193 err = 0;
4194 }
202b50dc 4195 } while (exception.retry);
a9ed2e25 4196out:
202b50dc 4197 return err;
1da177e4
LT		 4198}
4199
4200static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4201{
19e03c57 4202 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 4203 unsigned char fl_flags = request->fl_flags;
8e469ebd 4204 int status = -ENOLCK;
1da177e4 4205
8e469ebd
TM		 4206 if ((fl_flags & FL_POSIX) &&
4207 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4208 goto out;
6bfc93ef 4209 /* Is this a delegated open? */
6bfc93ef
TM		 4210 status = nfs4_set_lock_state(state, request);
4211 if (status != 0)
4212 goto out;
01c3b861
TM		 4213 request->fl_flags |= FL_ACCESS;
4214 status = do_vfs_lock(request->fl_file, request);
4215 if (status < 0)
4216 goto out;
19e03c57 4217 down_read(&nfsi->rwsem);
01c3b861 4218 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 4219 /* Yes: cache locks! */
01c3b861 4220 /* ...but avoid races with delegation recall... */
19e03c57
TM		 4221 request->fl_flags = fl_flags & ~FL_SLEEP;
4222 status = do_vfs_lock(request->fl_file, request);
4223 goto out_unlock;
01c3b861 4224 }
afe6c27c 4225 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 4226 if (status != 0)
01c3b861 4227 goto out_unlock;
6bfc93ef 4228 /* Note: we always want to sleep here! */
01c3b861 4229 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 4230 if (do_vfs_lock(request->fl_file, request) < 0)
3110ff80 4231 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
01c3b861 4232out_unlock:
19e03c57 4233 up_read(&nfsi->rwsem);
01c3b861
TM		 4234out:
4235 request->fl_flags = fl_flags;
1da177e4
LT		 4236 return status;
4237}
4238
4239static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4240{
4241 struct nfs4_exception exception = { };
4242 int err;
4243
4244 do {
965b5d67
TM		 4245 err = _nfs4_proc_setlk(state, cmd, request);
4246 if (err == -NFS4ERR_DENIED)
4247 err = -EAGAIN;
1da177e4 4248 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 4249 err, &exception);
1da177e4
LT		 4250 } while (exception.retry);
4251 return err;
4252}
4253
4254static int
4255nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4256{
4257 struct nfs_open_context *ctx;
4258 struct nfs4_state *state;
4259 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4260 int status;
4261
4262 /* verify open state */
cd3758e3 4263 ctx = nfs_file_open_context(filp);
1da177e4
LT		 4264 state = ctx->state;
4265
4266 if (request->fl_start < 0 || request->fl_end < 0)
4267 return -EINVAL;
4268
d953126a
TM		 4269 if (IS_GETLK(cmd)) {
4270 if (state != NULL)
4271 return nfs4_proc_getlk(state, F_GETLK, request);
4272 return 0;
4273 }
1da177e4
LT		 4274
4275 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4276 return -EINVAL;
4277
d953126a
TM		 4278 if (request->fl_type == F_UNLCK) {
4279 if (state != NULL)
4280 return nfs4_proc_unlck(state, cmd, request);
4281 return 0;
4282 }
1da177e4 4283
d953126a
TM		 4284 if (state == NULL)
4285 return -ENOLCK;
1da177e4
LT		 4286 do {
4287 status = nfs4_proc_setlk(state, cmd, request);
4288 if ((status != -EAGAIN) || IS_SETLK(cmd))
4289 break;
4290 timeout = nfs4_set_lock_task_retry(timeout);
4291 status = -ERESTARTSYS;
4292 if (signalled())
4293 break;
4294 } while(status < 0);
1da177e4
LT		 4295 return status;
4296}
4297
888e694c
TM		 4298int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4299{
4300 struct nfs_server *server = NFS_SERVER(state->inode);
4301 struct nfs4_exception exception = { };
4302 int err;
4303
4304 err = nfs4_set_lock_state(state, fl);
4305 if (err != 0)
4306 goto out;
4307 do {
afe6c27c 4308 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
d5122201
TM		 4309 switch (err) {
4310 default:
4311 printk(KERN_ERR "%s: unhandled error %d.\n",
4312 __func__, err);
4313 case 0:
965b5d67 4314 case -ESTALE:
d5122201
TM		 4315 goto out;
4316 case -NFS4ERR_EXPIRED:
4317 case -NFS4ERR_STALE_CLIENTID:
965b5d67 4318 case -NFS4ERR_STALE_STATEID:
74e7bb73
RL		 4319 case -NFS4ERR_BADSESSION:
4320 case -NFS4ERR_BADSLOT:
4321 case -NFS4ERR_BAD_HIGH_SLOT:
4322 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4323 case -NFS4ERR_DEADSESSION:
d5122201
TM		 4324 nfs4_schedule_state_recovery(server->nfs_client);
4325 goto out;
965b5d67
TM		 4326 case -ERESTARTSYS:
4327 /*
4328 * The show must go on: exit, but mark the
4329 * stateid as needing recovery.
4330 */
4331 case -NFS4ERR_ADMIN_REVOKED:
4332 case -NFS4ERR_BAD_STATEID:
4333 case -NFS4ERR_OPENMODE:
4334 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
4335 err = 0;
4336 goto out;
168667c4
TM		 4337 case -EKEYEXPIRED:
4338 /*
4339 * User RPCSEC_GSS context has expired.
4340 * We cannot recover this stateid now, so
4341 * skip it and allow recovery thread to
4342 * proceed.
4343 */
4344 err = 0;
4345 goto out;
965b5d67
TM		 4346 case -ENOMEM:
4347 case -NFS4ERR_DENIED:
4348 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4349 err = 0;
4350 goto out;
d5122201
TM		 4351 case -NFS4ERR_DELAY:
4352 break;
4353 }
888e694c
TM		 4354 err = nfs4_handle_exception(server, err, &exception);
4355 } while (exception.retry);
4356out:
4357 return err;
4358}
6b3b5496 4359
d3c7b7cc
TM		 4360static void nfs4_release_lockowner_release(void *calldata)
4361{
4362 kfree(calldata);
4363}
4364
4365const struct rpc_call_ops nfs4_release_lockowner_ops = {
4366 .rpc_release = nfs4_release_lockowner_release,
4367};
4368
4369void nfs4_release_lockowner(const struct nfs4_lock_state *lsp)
4370{
4371 struct nfs_server *server = lsp->ls_state->owner->so_server;
4372 struct nfs_release_lockowner_args *args;
4373 struct rpc_message msg = {
4374 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
4375 };
4376
4377 if (server->nfs_client->cl_mvops->minor_version != 0)
4378 return;
4379 args = kmalloc(sizeof(*args), GFP_NOFS);
4380 if (!args)
4381 return;
4382 args->lock_owner.clientid = server->nfs_client->cl_clientid;
4383 args->lock_owner.id = lsp->ls_id.id;
4384 msg.rpc_argp = args;
4385 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, args);
4386}
4387
aa1870af
BF		 4388#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4389
6b3b5496
BF		 4390int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
4391 size_t buflen, int flags)
4392{
4b580ee3
BF		 4393 struct inode *inode = dentry->d_inode;
4394
4395 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4396 return -EOPNOTSUPP;
4397
4b580ee3 4398 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 4399}
4400
4401/* The getxattr man page suggests returning -ENODATA for unknown attributes,
4402 * and that's what we'll do for e.g. user attributes that haven't been set.
4403 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
4404 * attributes in kernel-managed attribute namespaces. */
4405ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
4406 size_t buflen)
4407{
aa1870af
BF		 4408 struct inode *inode = dentry->d_inode;
4409
4410 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4411 return -EOPNOTSUPP;
4412
4413 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 4414}
4415
4416ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
4417{
aa1870af 4418 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
6b3b5496 4419
096455a2
BF		 4420 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4421 return 0;
6b3b5496
BF		 4422 if (buf && buflen < len)
4423 return -ERANGE;
4424 if (buf)
aa1870af
BF		 4425 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
4426 return len;
6b3b5496
BF		 4427}
4428
69aaaae1
TM		 4429static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4430{
4431 if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) &&
4432 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4433 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
4434 return;
4435
4436 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4437 NFS_ATTR_FATTR_NLINK;
4438 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4439 fattr->nlink = 2;
4440}
4441
56659e99 4442int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
7aaa0b3b 4443 struct nfs4_fs_locations *fs_locations, struct page *page)
683b57b4
TM		 4444{
4445 struct nfs_server *server = NFS_SERVER(dir);
4446 u32 bitmask[2] = {
361e624f
MN		 4447 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4448 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
683b57b4
TM		 4449 };
4450 struct nfs4_fs_locations_arg args = {
4451 .dir_fh = NFS_FH(dir),
c228fd3a 4452 .name = name,
683b57b4
TM		 4453 .page = page,
4454 .bitmask = bitmask,
4455 };
22958463
BH		 4456 struct nfs4_fs_locations_res res = {
4457 .fs_locations = fs_locations,
4458 };
683b57b4
TM		 4459 struct rpc_message msg = {
4460 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4461 .rpc_argp = &args,
22958463 4462 .rpc_resp = &res,
683b57b4
TM		 4463 };
4464 int status;
4465
3110ff80 4466 dprintk("%s: start\n", __func__);
c228fd3a 4467 nfs_fattr_init(&fs_locations->fattr);
683b57b4 4468 fs_locations->server = server;
830b8e33 4469 fs_locations->nlocations = 0;
cccef3b9 4470 status = nfs4_call_sync(server, &msg, &args, &res, 0);
69aaaae1 4471 nfs_fixup_referral_attributes(&fs_locations->fattr);
3110ff80 4472 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 4473 return status;
4474}
4475
557134a3 4476#ifdef CONFIG_NFS_V4_1
99fe60d0
BH		 4477/*
4478 * nfs4_proc_exchange_id()
4479 *
4480 * Since the clientid has expired, all compounds using sessions
4481 * associated with the stale clientid will be returning
4482 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4483 * be in some phase of session reset.
4484 */
4d643d1d 4485int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 4486{
4487 nfs4_verifier verifier;
4488 struct nfs41_exchange_id_args args = {
4489 .client = clp,
4490 .flags = clp->cl_exchange_flags,
4491 };
4492 struct nfs41_exchange_id_res res = {
4493 .client = clp,
4494 };
4495 int status;
4496 struct rpc_message msg = {
4497 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4498 .rpc_argp = &args,
4499 .rpc_resp = &res,
4500 .rpc_cred = cred,
4501 };
4502 __be32 *p;
4503
4504 dprintk("--> %s\n", __func__);
4505 BUG_ON(clp == NULL);
a7b72103 4506
7b183d0d
AB		 4507 /* Remove server-only flags */
4508 args.flags &= ~EXCHGID4_FLAG_CONFIRMED_R;
4509
99fe60d0
BH		 4510 p = (u32 *)verifier.data;
4511 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
4512 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
4513 args.verifier = &verifier;
4514
4515 while (1) {
4516 args.id_len = scnprintf(args.id, sizeof(args.id),
4517 "%s/%s %u",
4518 clp->cl_ipaddr,
4519 rpc_peeraddr2str(clp->cl_rpcclient,
4520 RPC_DISPLAY_ADDR),
4521 clp->cl_id_uniquifier);
4522
4523 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
4524
180b62a3 4525 if (status != -NFS4ERR_CLID_INUSE)
99fe60d0
BH		 4526 break;
4527
4528 if (signalled())
4529 break;
4530
4531 if (++clp->cl_id_uniquifier == 0)
4532 break;
4533 }
4534
4535 dprintk("<-- %s status= %d\n", __func__, status);
4536 return status;
4537}
4538
2050f0cc
AA		 4539struct nfs4_get_lease_time_data {
4540 struct nfs4_get_lease_time_args *args;
4541 struct nfs4_get_lease_time_res *res;
4542 struct nfs_client *clp;
4543};
4544
4545static void nfs4_get_lease_time_prepare(struct rpc_task *task,
4546 void *calldata)
4547{
4548 int ret;
4549 struct nfs4_get_lease_time_data *data =
4550 (struct nfs4_get_lease_time_data *)calldata;
4551
4552 dprintk("--> %s\n", __func__);
689cf5c1 4553 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
2050f0cc
AA		 4554 /* just setup sequence, do not trigger session recovery
4555 since we're invoked within one */
4556 ret = nfs41_setup_sequence(data->clp->cl_session,
689cf5c1
AB		 4557 &data->args->la_seq_args,
4558 &data->res->lr_seq_res, 0, task);
2050f0cc
AA		 4559
4560 BUG_ON(ret == -EAGAIN);
4561 rpc_call_start(task);
4562 dprintk("<-- %s\n", __func__);
4563}
4564
4565/*
4566 * Called from nfs4_state_manager thread for session setup, so don't recover
4567 * from sequence operation or clientid errors.
4568 */
4569static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
4570{
4571 struct nfs4_get_lease_time_data *data =
4572 (struct nfs4_get_lease_time_data *)calldata;
4573
4574 dprintk("--> %s\n", __func__);
14516c3a
TM		 4575 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
4576 return;
2050f0cc
AA		 4577 switch (task->tk_status) {
4578 case -NFS4ERR_DELAY:
4579 case -NFS4ERR_GRACE:
4580 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
4581 rpc_delay(task, NFS4_POLL_RETRY_MIN);
4582 task->tk_status = 0;
0110ee15 4583 nfs_restart_rpc(task, data->clp);
2050f0cc
AA		 4584 return;
4585 }
2050f0cc
AA		 4586 dprintk("<-- %s\n", __func__);
4587}
4588
4589struct rpc_call_ops nfs4_get_lease_time_ops = {
4590 .rpc_call_prepare = nfs4_get_lease_time_prepare,
4591 .rpc_call_done = nfs4_get_lease_time_done,
4592};
4593
4594int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
4595{
4596 struct rpc_task *task;
4597 struct nfs4_get_lease_time_args args;
4598 struct nfs4_get_lease_time_res res = {
4599 .lr_fsinfo = fsinfo,
4600 };
4601 struct nfs4_get_lease_time_data data = {
4602 .args = &args,
4603 .res = &res,
4604 .clp = clp,
4605 };
4606 struct rpc_message msg = {
4607 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
4608 .rpc_argp = &args,
4609 .rpc_resp = &res,
4610 };
4611 struct rpc_task_setup task_setup = {
4612 .rpc_client = clp->cl_rpcclient,
4613 .rpc_message = &msg,
4614 .callback_ops = &nfs4_get_lease_time_ops,
4615 .callback_data = &data
4616 };
4617 int status;
4618
2050f0cc
AA		 4619 dprintk("--> %s\n", __func__);
4620 task = rpc_run_task(&task_setup);
4621
4622 if (IS_ERR(task))
4623 status = PTR_ERR(task);
4624 else {
4625 status = task->tk_status;
4626 rpc_put_task(task);
4627 }
4628 dprintk("<-- %s return %d\n", __func__, status);
4629
4630 return status;
4631}
4632
b73dafa7
RL		 4633/*
4634 * Reset a slot table
4635 */
104aeba4
AA		 4636static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
4637 int ivalue)
ac72b7b3 4638{
104aeba4 4639 struct nfs4_slot *new = NULL;
b73dafa7 4640 int i;
ac72b7b3
AA		 4641 int ret = 0;
4642
104aeba4
AA		 4643 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
4644 max_reqs, tbl->max_slots);
ac72b7b3 4645
104aeba4
AA		 4646 /* Does the newly negotiated max_reqs match the existing slot table? */
4647 if (max_reqs != tbl->max_slots) {
4648 ret = -ENOMEM;
4649 new = kmalloc(max_reqs * sizeof(struct nfs4_slot),
8535b2be 4650 GFP_NOFS);
104aeba4
AA		 4651 if (!new)
4652 goto out;
4653 ret = 0;
4654 kfree(tbl->slots);
ac72b7b3
AA		 4655 }
4656 spin_lock(&tbl->slot_tbl_lock);
104aeba4
AA		 4657 if (new) {
4658 tbl->slots = new;
4659 tbl->max_slots = max_reqs;
4660 }
4661 for (i = 0; i < tbl->max_slots; ++i)
b73dafa7 4662 tbl->slots[i].seq_nr = ivalue;
ac72b7b3
AA		 4663 spin_unlock(&tbl->slot_tbl_lock);
4664 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4665 tbl, tbl->slots, tbl->max_slots);
4666out:
4667 dprintk("<-- %s: return %d\n", __func__, ret);
4668 return ret;
4669}
4670
b73dafa7
RL		 4671/*
4672 * Reset the forechannel and backchannel slot tables
4673 */
4674static int nfs4_reset_slot_tables(struct nfs4_session *session)
4675{
4676 int status;
4677
4678 status = nfs4_reset_slot_table(&session->fc_slot_table,
104aeba4 4679 session->fc_attrs.max_reqs, 1);
f8625a6a
RL		 4680 if (status)
4681 return status;
4682
4683 status = nfs4_reset_slot_table(&session->bc_slot_table,
104aeba4 4684 session->bc_attrs.max_reqs, 0);
b73dafa7
RL		 4685 return status;
4686}
4687
f8625a6a
RL		 4688/* Destroy the slot table */
4689static void nfs4_destroy_slot_tables(struct nfs4_session *session)
4690{
4691 if (session->fc_slot_table.slots != NULL) {
4692 kfree(session->fc_slot_table.slots);
4693 session->fc_slot_table.slots = NULL;
4694 }
4695 if (session->bc_slot_table.slots != NULL) {
4696 kfree(session->bc_slot_table.slots);
4697 session->bc_slot_table.slots = NULL;
4698 }
4699 return;
4700}
4701
fc931582
AA		 4702/*
4703 * Initialize slot table
4704 */
050047ce
RL		 4705static int nfs4_init_slot_table(struct nfs4_slot_table *tbl,
4706 int max_slots, int ivalue)
fc931582 4707{
fc931582
AA		 4708 struct nfs4_slot *slot;
4709 int ret = -ENOMEM;
4710
4711 BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE);
4712
050047ce 4713 dprintk("--> %s: max_reqs=%u\n", __func__, max_slots);
fc931582 4714
8535b2be 4715 slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_NOFS);
fc931582
AA		 4716 if (!slot)
4717 goto out;
fc931582
AA		 4718 ret = 0;
4719
4720 spin_lock(&tbl->slot_tbl_lock);
fc931582
AA		 4721 tbl->max_slots = max_slots;
4722 tbl->slots = slot;
4723 tbl->highest_used_slotid = -1; /* no slot is currently used */
4724 spin_unlock(&tbl->slot_tbl_lock);
4725 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4726 tbl, tbl->slots, tbl->max_slots);
4727out:
4728 dprintk("<-- %s: return %d\n", __func__, ret);
4729 return ret;
fc931582
AA		 4730}
4731
050047ce
RL		 4732/*
4733 * Initialize the forechannel and backchannel tables
4734 */
4735static int nfs4_init_slot_tables(struct nfs4_session *session)
4736{
f26468fb
TM		 4737 struct nfs4_slot_table *tbl;
4738 int status = 0;
050047ce 4739
f26468fb
TM		 4740 tbl = &session->fc_slot_table;
4741 if (tbl->slots == NULL) {
4742 status = nfs4_init_slot_table(tbl,
4743 session->fc_attrs.max_reqs, 1);
4744 if (status)
4745 return status;
4746 }
050047ce 4747
f26468fb
TM		 4748 tbl = &session->bc_slot_table;
4749 if (tbl->slots == NULL) {
4750 status = nfs4_init_slot_table(tbl,
4751 session->bc_attrs.max_reqs, 0);
4752 if (status)
4753 nfs4_destroy_slot_tables(session);
4754 }
f8625a6a
RL		 4755
4756 return status;
557134a3
AA		 4757}
4758
4759struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
4760{
4761 struct nfs4_session *session;
4762 struct nfs4_slot_table *tbl;
4763
8535b2be 4764 session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
557134a3
AA		 4765 if (!session)
4766 return NULL;
76db6d95 4767
ea028ac9 4768 init_completion(&session->complete);
76db6d95 4769
557134a3 4770 tbl = &session->fc_slot_table;
9dfdf404 4771 tbl->highest_used_slotid = -1;
557134a3 4772 spin_lock_init(&tbl->slot_tbl_lock);
689cf5c1 4773 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
f8625a6a
RL		 4774
4775 tbl = &session->bc_slot_table;
9dfdf404 4776 tbl->highest_used_slotid = -1;
f8625a6a
RL		 4777 spin_lock_init(&tbl->slot_tbl_lock);
4778 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
4779
1055d76d
TM		 4780 session->session_state = 1<<NFS4_SESSION_INITING;
4781
557134a3
AA		 4782 session->clp = clp;
4783 return session;
4784}
4785
4786void nfs4_destroy_session(struct nfs4_session *session)
4787{
5a0ffe54
AA		 4788 nfs4_proc_destroy_session(session);
4789 dprintk("%s Destroy backchannel for xprt %p\n",
4790 __func__, session->clp->cl_rpcclient->cl_xprt);
4791 xprt_destroy_backchannel(session->clp->cl_rpcclient->cl_xprt,
4792 NFS41_BC_MIN_CALLBACKS);
f8625a6a 4793 nfs4_destroy_slot_tables(session);
557134a3
AA		 4794 kfree(session);
4795}
4796
fc931582
AA		 4797/*
4798 * Initialize the values to be used by the client in CREATE_SESSION
4799 * If nfs4_init_session set the fore channel request and response sizes,
4800 * use them.
4801 *
4802 * Set the back channel max_resp_sz_cached to zero to force the client to
4803 * always set csa_cachethis to FALSE because the current implementation
4804 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
4805 */
4806static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
4807{
4808 struct nfs4_session *session = args->client->cl_session;
4809 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
4810 mxresp_sz = session->fc_attrs.max_resp_sz;
4811
4812 if (mxrqst_sz == 0)
4813 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
4814 if (mxresp_sz == 0)
4815 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
4816 /* Fore channel attributes */
4817 args->fc_attrs.headerpadsz = 0;
4818 args->fc_attrs.max_rqst_sz = mxrqst_sz;
4819 args->fc_attrs.max_resp_sz = mxresp_sz;
fc931582
AA		 4820 args->fc_attrs.max_ops = NFS4_MAX_OPS;
4821 args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs;
4822
4823 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 4824 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 4825 __func__,
4826 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 4827 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 4828
4829 /* Back channel attributes */
4830 args->bc_attrs.headerpadsz = 0;
4831 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
4832 args->bc_attrs.max_resp_sz = PAGE_SIZE;
4833 args->bc_attrs.max_resp_sz_cached = 0;
4834 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
4835 args->bc_attrs.max_reqs = 1;
4836
4837 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
4838 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4839 __func__,
4840 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
4841 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
4842 args->bc_attrs.max_reqs);
4843}
4844
43c2e885 4845static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 4846{
43c2e885
BF		 4847 struct nfs4_channel_attrs *sent = &args->fc_attrs;
4848 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
4849
4850 if (rcvd->headerpadsz > sent->headerpadsz)
4851 return -EINVAL;
4852 if (rcvd->max_resp_sz > sent->max_resp_sz)
4853 return -EINVAL;
4854 /*
4855 * Our requested max_ops is the minimum we need; we're not
4856 * prepared to break up compounds into smaller pieces than that.
4857 * So, no point even trying to continue if the server won't
4858 * cooperate:
4859 */
4860 if (rcvd->max_ops < sent->max_ops)
4861 return -EINVAL;
4862 if (rcvd->max_reqs == 0)
4863 return -EINVAL;
4864 return 0;
8d35301d
AA		 4865}
4866
43c2e885
BF		 4867static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
4868{
4869 struct nfs4_channel_attrs *sent = &args->bc_attrs;
4870 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 4871
43c2e885
BF		 4872 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
4873 return -EINVAL;
4874 if (rcvd->max_resp_sz < sent->max_resp_sz)
4875 return -EINVAL;
4876 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
4877 return -EINVAL;
4878 /* These would render the backchannel useless: */
4879 if (rcvd->max_ops == 0)
4880 return -EINVAL;
4881 if (rcvd->max_reqs == 0)
4882 return -EINVAL;
4883 return 0;
4884}
8d35301d 4885
8d35301d
AA		 4886static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
4887 struct nfs4_session *session)
4888{
43c2e885 4889 int ret;
8d35301d 4890
43c2e885
BF		 4891 ret = nfs4_verify_fore_channel_attrs(args, session);
4892 if (ret)
4893 return ret;
4894 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 4895}
4896
fc931582
AA		 4897static int _nfs4_proc_create_session(struct nfs_client *clp)
4898{
4899 struct nfs4_session *session = clp->cl_session;
4900 struct nfs41_create_session_args args = {
4901 .client = clp,
4902 .cb_program = NFS4_CALLBACK,
4903 };
4904 struct nfs41_create_session_res res = {
4905 .client = clp,
4906 };
4907 struct rpc_message msg = {
4908 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
4909 .rpc_argp = &args,
4910 .rpc_resp = &res,
4911 };
4912 int status;
4913
4914 nfs4_init_channel_attrs(&args);
0f91421e 4915 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582
AA		 4916
4917 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4918
8d35301d
AA		 4919 if (!status)
4920 /* Verify the session's negotiated channel_attrs values */
4921 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 4922 if (!status) {
4923 /* Increment the clientid slot sequence id */
4924 clp->cl_seqid++;
4925 }
4926
4927 return status;
4928}
4929
4930/*
4931 * Issues a CREATE_SESSION operation to the server.
4932 * It is the responsibility of the caller to verify the session is
4933 * expired before calling this routine.
4934 */
f26468fb 4935int nfs4_proc_create_session(struct nfs_client *clp)
fc931582
AA		 4936{
4937 int status;
4938 unsigned *ptr;
fc931582
AA		 4939 struct nfs4_session *session = clp->cl_session;
4940
4941 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
4942
4943 status = _nfs4_proc_create_session(clp);
4944 if (status)
4945 goto out;
4946
f26468fb
TM		 4947 /* Init and reset the fore channel */
4948 status = nfs4_init_slot_tables(session);
4949 dprintk("slot table initialization returned %d\n", status);
4950 if (status)
4951 goto out;
4952 status = nfs4_reset_slot_tables(session);
4953 dprintk("slot table reset returned %d\n", status);
fc931582
AA		 4954 if (status)
4955 goto out;
4956
4957 ptr = (unsigned *)&session->sess_id.data[0];
4958 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
4959 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 4960out:
4961 dprintk("<-- %s\n", __func__);
4962 return status;
4963}
4964
0f3e66c6
AA		 4965/*
4966 * Issue the over-the-wire RPC DESTROY_SESSION.
4967 * The caller must serialize access to this routine.
4968 */
4969int nfs4_proc_destroy_session(struct nfs4_session *session)
4970{
4971 int status = 0;
4972 struct rpc_message msg;
4973
4974 dprintk("--> nfs4_proc_destroy_session\n");
4975
4976 /* session is still being setup */
4977 if (session->clp->cl_cons_state != NFS_CS_READY)
4978 return status;
4979
4980 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
4981 msg.rpc_argp = session;
4982 msg.rpc_resp = NULL;
4983 msg.rpc_cred = NULL;
4984 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4985
4986 if (status)
4987 printk(KERN_WARNING
4988 "Got error %d from the server on DESTROY_SESSION. "
4989 "Session has been destroyed regardless...\n", status);
4990
4991 dprintk("<-- nfs4_proc_destroy_session\n");
4992 return status;
4993}
4994
fccba804
TM		 4995int nfs4_init_session(struct nfs_server *server)
4996{
4997 struct nfs_client *clp = server->nfs_client;
2449ea2e 4998 struct nfs4_session *session;
68bf05ef 4999 unsigned int rsize, wsize;
fccba804
TM		 5000 int ret;
5001
5002 if (!nfs4_has_session(clp))
5003 return 0;
5004
1055d76d
TM		 5005 session = clp->cl_session;
5006 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
5007 return 0;
5008
68bf05ef
AA		 5009 rsize = server->rsize;
5010 if (rsize == 0)
5011 rsize = NFS_MAX_FILE_IO_SIZE;
5012 wsize = server->wsize;
5013 if (wsize == 0)
5014 wsize = NFS_MAX_FILE_IO_SIZE;
5015
68bf05ef
AA		 5016 session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
5017 session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
2449ea2e 5018
fccba804
TM		 5019 ret = nfs4_recover_expired_lease(server);
5020 if (!ret)
5021 ret = nfs4_check_client_ready(clp);
5022 return ret;
5023}
5024
fc01cea9
AA		 5025/*
5026 * Renew the cl_session lease.
5027 */
d5f8d3fe
TM		 5028struct nfs4_sequence_data {
5029 struct nfs_client *clp;
5030 struct nfs4_sequence_args args;
5031 struct nfs4_sequence_res res;
5032};
5033
dc96aef9
AB		 5034static void nfs41_sequence_release(void *data)
5035{
d5f8d3fe
TM		 5036 struct nfs4_sequence_data *calldata = data;
5037 struct nfs_client *clp = calldata->clp;
dc96aef9 5038
7135840f
AB		 5039 if (atomic_read(&clp->cl_count) > 1)
5040 nfs4_schedule_state_renewal(clp);
5041 nfs_put_client(clp);
d5f8d3fe 5042 kfree(calldata);
dc96aef9
AB		 5043}
5044
aa5190d0
TM		 5045static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5046{
5047 switch(task->tk_status) {
5048 case -NFS4ERR_DELAY:
aa5190d0
TM		 5049 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5050 return -EAGAIN;
5051 default:
5052 nfs4_schedule_state_recovery(clp);
5053 }
5054 return 0;
5055}
5056
dc96aef9 5057static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 5058{
d5f8d3fe
TM		 5059 struct nfs4_sequence_data *calldata = data;
5060 struct nfs_client *clp = calldata->clp;
fc01cea9 5061
14516c3a
TM		 5062 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5063 return;
fc01cea9
AA		 5064
5065 if (task->tk_status < 0) {
5066 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 5067 if (atomic_read(&clp->cl_count) == 1)
5068 goto out;
fc01cea9 5069
aa5190d0
TM		 5070 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5071 rpc_restart_call_prepare(task);
fc01cea9
AA		 5072 return;
5073 }
5074 }
fc01cea9 5075 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 5076out:
fc01cea9
AA		 5077 dprintk("<-- %s\n", __func__);
5078}
5079
5080static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5081{
d5f8d3fe
TM		 5082 struct nfs4_sequence_data *calldata = data;
5083 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 5084 struct nfs4_sequence_args *args;
5085 struct nfs4_sequence_res *res;
5086
fc01cea9
AA		 5087 args = task->tk_msg.rpc_argp;
5088 res = task->tk_msg.rpc_resp;
5089
035168ab 5090 if (nfs41_setup_sequence(clp->cl_session, args, res, 0, task))
fc01cea9
AA		 5091 return;
5092 rpc_call_start(task);
5093}
5094
5095static const struct rpc_call_ops nfs41_sequence_ops = {
5096 .rpc_call_done = nfs41_sequence_call_done,
5097 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 5098 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 5099};
5100
71ac6da9 5101static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
fc01cea9 5102{
d5f8d3fe 5103 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 5104 struct rpc_message msg = {
5105 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5106 .rpc_cred = cred,
5107 };
71ac6da9
TM		 5108 struct rpc_task_setup task_setup_data = {
5109 .rpc_client = clp->cl_rpcclient,
5110 .rpc_message = &msg,
5111 .callback_ops = &nfs41_sequence_ops,
5112 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
5113 };
fc01cea9 5114
7135840f 5115 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 5116 return ERR_PTR(-EIO);
dfb4f309 5117 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 5118 if (calldata == NULL) {
7135840f 5119 nfs_put_client(clp);
71ac6da9 5120 return ERR_PTR(-ENOMEM);
fc01cea9 5121 }
d5f8d3fe
TM		 5122 msg.rpc_argp = &calldata->args;
5123 msg.rpc_resp = &calldata->res;
5124 calldata->clp = clp;
71ac6da9 5125 task_setup_data.callback_data = calldata;
fc01cea9 5126
71ac6da9
TM		 5127 return rpc_run_task(&task_setup_data);
5128}
5129
5130static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5131{
5132 struct rpc_task *task;
5133 int ret = 0;
5134
5135 task = _nfs41_proc_sequence(clp, cred);
5136 if (IS_ERR(task))
5137 ret = PTR_ERR(task);
5138 else
5139 rpc_put_task(task);
5140 dprintk("<-- %s status=%d\n", __func__, ret);
5141 return ret;
5142}
5143
5144static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5145{
5146 struct rpc_task *task;
5147 int ret;
5148
5149 task = _nfs41_proc_sequence(clp, cred);
5150 if (IS_ERR(task)) {
5151 ret = PTR_ERR(task);
5152 goto out;
5153 }
5154 ret = rpc_wait_for_completion_task(task);
5155 if (!ret)
5156 ret = task->tk_status;
5157 rpc_put_task(task);
5158out:
5159 dprintk("<-- %s status=%d\n", __func__, ret);
5160 return ret;
fc01cea9
AA		 5161}
5162
fce5c838
RL		 5163struct nfs4_reclaim_complete_data {
5164 struct nfs_client *clp;
5165 struct nfs41_reclaim_complete_args arg;
5166 struct nfs41_reclaim_complete_res res;
5167};
5168
5169static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
5170{
5171 struct nfs4_reclaim_complete_data *calldata = data;
5172
b257957e 5173 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
035168ab
TM		 5174 if (nfs41_setup_sequence(calldata->clp->cl_session,
5175 &calldata->arg.seq_args,
fce5c838
RL		 5176 &calldata->res.seq_res, 0, task))
5177 return;
5178
5179 rpc_call_start(task);
5180}
5181
aa5190d0
TM		 5182static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5183{
5184 switch(task->tk_status) {
5185 case 0:
5186 case -NFS4ERR_COMPLETE_ALREADY:
5187 case -NFS4ERR_WRONG_CRED: /* What to do here? */
5188 break;
5189 case -NFS4ERR_DELAY:
aa5190d0
TM		 5190 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5191 return -EAGAIN;
5192 default:
5193 nfs4_schedule_state_recovery(clp);
5194 }
5195 return 0;
5196}
5197
fce5c838
RL		 5198static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
5199{
5200 struct nfs4_reclaim_complete_data *calldata = data;
5201 struct nfs_client *clp = calldata->clp;
5202 struct nfs4_sequence_res *res = &calldata->res.seq_res;
5203
5204 dprintk("--> %s\n", __func__);
14516c3a
TM		 5205 if (!nfs41_sequence_done(task, res))
5206 return;
fce5c838 5207
aa5190d0
TM		 5208 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
5209 rpc_restart_call_prepare(task);
5210 return;
5211 }
fce5c838
RL		 5212 dprintk("<-- %s\n", __func__);
5213}
5214
5215static void nfs4_free_reclaim_complete_data(void *data)
5216{
5217 struct nfs4_reclaim_complete_data *calldata = data;
5218
5219 kfree(calldata);
5220}
5221
5222static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
5223 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
5224 .rpc_call_done = nfs4_reclaim_complete_done,
5225 .rpc_release = nfs4_free_reclaim_complete_data,
5226};
5227
5228/*
5229 * Issue a global reclaim complete.
5230 */
5231static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
5232{
5233 struct nfs4_reclaim_complete_data *calldata;
5234 struct rpc_task *task;
5235 struct rpc_message msg = {
5236 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5237 };
5238 struct rpc_task_setup task_setup_data = {
5239 .rpc_client = clp->cl_rpcclient,
5240 .rpc_message = &msg,
5241 .callback_ops = &nfs4_reclaim_complete_call_ops,
5242 .flags = RPC_TASK_ASYNC,
5243 };
5244 int status = -ENOMEM;
5245
5246 dprintk("--> %s\n", __func__);
8535b2be 5247 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 5248 if (calldata == NULL)
5249 goto out;
5250 calldata->clp = clp;
5251 calldata->arg.one_fs = 0;
fce5c838
RL		 5252
5253 msg.rpc_argp = &calldata->arg;
5254 msg.rpc_resp = &calldata->res;
5255 task_setup_data.callback_data = calldata;
5256 task = rpc_run_task(&task_setup_data);
acf82b85 5257 if (IS_ERR(task)) {
fce5c838 5258 status = PTR_ERR(task);
acf82b85
DC		 5259 goto out;
5260 }
fce5c838 5261 rpc_put_task(task);
acf82b85 5262 return 0;
fce5c838
RL		 5263out:
5264 dprintk("<-- %s status=%d\n", __func__, status);
5265 return status;
5266}
b1f69b75
AA		 5267
5268static void
5269nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
5270{
5271 struct nfs4_layoutget *lgp = calldata;
5272 struct inode *ino = lgp->args.inode;
5273 struct nfs_server *server = NFS_SERVER(ino);
5274
5275 dprintk("--> %s\n", __func__);
5276 if (nfs4_setup_sequence(server, &lgp->args.seq_args,
5277 &lgp->res.seq_res, 0, task))
5278 return;
5279 rpc_call_start(task);
5280}
5281
5282static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
5283{
5284 struct nfs4_layoutget *lgp = calldata;
5285 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5286
5287 dprintk("--> %s\n", __func__);
5288
5289 if (!nfs4_sequence_done(task, &lgp->res.seq_res))
5290 return;
5291
5292 switch (task->tk_status) {
5293 case 0:
5294 break;
5295 case -NFS4ERR_LAYOUTTRYLATER:
5296 case -NFS4ERR_RECALLCONFLICT:
5297 task->tk_status = -NFS4ERR_DELAY;
5298 /* Fall through */
5299 default:
5300 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
5301 rpc_restart_call_prepare(task);
5302 return;
5303 }
5304 }
5305 lgp->status = task->tk_status;
5306 dprintk("<-- %s\n", __func__);
5307}
5308
5309static void nfs4_layoutget_release(void *calldata)
5310{
5311 struct nfs4_layoutget *lgp = calldata;
5312
5313 dprintk("--> %s\n", __func__);
5314 put_layout_hdr(lgp->args.inode);
5315 if (lgp->res.layout.buf != NULL)
5316 free_page((unsigned long) lgp->res.layout.buf);
5317 put_nfs_open_context(lgp->args.ctx);
5318 kfree(calldata);
5319 dprintk("<-- %s\n", __func__);
5320}
5321
5322static const struct rpc_call_ops nfs4_layoutget_call_ops = {
5323 .rpc_call_prepare = nfs4_layoutget_prepare,
5324 .rpc_call_done = nfs4_layoutget_done,
5325 .rpc_release = nfs4_layoutget_release,
5326};
5327
5328int nfs4_proc_layoutget(struct nfs4_layoutget *lgp)
5329{
5330 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5331 struct rpc_task *task;
5332 struct rpc_message msg = {
5333 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
5334 .rpc_argp = &lgp->args,
5335 .rpc_resp = &lgp->res,
5336 };
5337 struct rpc_task_setup task_setup_data = {
5338 .rpc_client = server->client,
5339 .rpc_message = &msg,
5340 .callback_ops = &nfs4_layoutget_call_ops,
5341 .callback_data = lgp,
5342 .flags = RPC_TASK_ASYNC,
5343 };
5344 int status = 0;
5345
5346 dprintk("--> %s\n", __func__);
5347
5348 lgp->res.layout.buf = (void *)__get_free_page(GFP_NOFS);
5349 if (lgp->res.layout.buf == NULL) {
5350 nfs4_layoutget_release(lgp);
5351 return -ENOMEM;
5352 }
5353
5354 lgp->res.seq_res.sr_slot = NULL;
5355 task = rpc_run_task(&task_setup_data);
5356 if (IS_ERR(task))
5357 return PTR_ERR(task);
5358 status = nfs4_wait_for_completion_rpc_task(task);
5359 if (status != 0)
5360 goto out;
5361 status = lgp->status;
5362 if (status != 0)
5363 goto out;
5364 status = pnfs_layout_process(lgp);
5365out:
5366 rpc_put_task(task);
5367 dprintk("<-- %s status=%d\n", __func__, status);
5368 return status;
5369}
5370
5371static int
5372_nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
5373{
5374 struct nfs4_getdeviceinfo_args args = {
5375 .pdev = pdev,
5376 };
5377 struct nfs4_getdeviceinfo_res res = {
5378 .pdev = pdev,
5379 };
5380 struct rpc_message msg = {
5381 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
5382 .rpc_argp = &args,
5383 .rpc_resp = &res,
5384 };
5385 int status;
5386
5387 dprintk("--> %s\n", __func__);
5388 status = nfs4_call_sync(server, &msg, &args, &res, 0);
5389 dprintk("<-- %s status=%d\n", __func__, status);
5390
5391 return status;
5392}
5393
5394int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
5395{
5396 struct nfs4_exception exception = { };
5397 int err;
5398
5399 do {
5400 err = nfs4_handle_exception(server,
5401 _nfs4_proc_getdeviceinfo(server, pdev),
5402 &exception);
5403 } while (exception.retry);
5404 return err;
5405}
5406EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
5407
557134a3
AA		 5408#endif /* CONFIG_NFS_V4_1 */
5409
591d71cb 5410struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 5411 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 5412 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 5413 .recover_open = nfs4_open_reclaim,
5414 .recover_lock = nfs4_lock_reclaim,
591d71cb 5415 .establish_clid = nfs4_init_clientid,
90a16617 5416 .get_clid_cred = nfs4_get_setclientid_cred,
1da177e4
LT		 5417};
5418
591d71cb
AA		 5419#if defined(CONFIG_NFS_V4_1)
5420struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
5421 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
5422 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
5423 .recover_open = nfs4_open_reclaim,
5424 .recover_lock = nfs4_lock_reclaim,
4d643d1d 5425 .establish_clid = nfs41_init_clientid,
b4b82607 5426 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 5427 .reclaim_complete = nfs41_proc_reclaim_complete,
591d71cb
AA		 5428};
5429#endif /* CONFIG_NFS_V4_1 */
5430
5431struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
5432 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
5433 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
5434 .recover_open = nfs4_open_expired,
5435 .recover_lock = nfs4_lock_expired,
5436 .establish_clid = nfs4_init_clientid,
90a16617 5437 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 5438};
5439
5440#if defined(CONFIG_NFS_V4_1)
5441struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 5442 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 5443 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
1da177e4
LT		 5444 .recover_open = nfs4_open_expired,
5445 .recover_lock = nfs4_lock_expired,
4d643d1d 5446 .establish_clid = nfs41_init_clientid,
b4b82607 5447 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 5448};
591d71cb 5449#endif /* CONFIG_NFS_V4_1 */
1da177e4 5450
29fba38b
BH		 5451struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
5452 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 5453 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 5454 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 5455};
5456
5457#if defined(CONFIG_NFS_V4_1)
5458struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
5459 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 5460 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 5461 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 5462};
5463#endif
5464
97dc1359
TM		 5465static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
5466 .minor_version = 0,
5467 .call_sync = _nfs4_call_sync,
e047a10c 5468 .validate_stateid = nfs4_validate_delegation_stateid,
c48f4f35
TM		 5469 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
5470 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
5471 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 5472};
5473
5474#if defined(CONFIG_NFS_V4_1)
5475static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
5476 .minor_version = 1,
5477 .call_sync = _nfs4_call_sync_session,
e047a10c 5478 .validate_stateid = nfs41_validate_delegation_stateid,
c48f4f35
TM		 5479 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
5480 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
5481 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 5482};
5483#endif
5484
97dc1359
TM		 5485const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
5486 [0] = &nfs_v4_0_minor_ops,
5487#if defined(CONFIG_NFS_V4_1)
5488 [1] = &nfs_v4_1_minor_ops,
5489#endif
5490};
5491
92e1d5be 5492static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 5493 .permission = nfs_permission,
5494 .getattr = nfs_getattr,
5495 .setattr = nfs_setattr,
5496 .getxattr = nfs4_getxattr,
5497 .setxattr = nfs4_setxattr,
5498 .listxattr = nfs4_listxattr,
5499};
5500
509de811 5501const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 5502 .version = 4, /* protocol version */
5503 .dentry_ops = &nfs4_dentry_operations,
5504 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 5505 .file_inode_ops = &nfs4_file_inode_operations,
1da177e4
LT		 5506 .getroot = nfs4_proc_get_root,
5507 .getattr = nfs4_proc_getattr,
5508 .setattr = nfs4_proc_setattr,
2b3de441 5509 .lookupfh = nfs4_proc_lookupfh,
1da177e4
LT		 5510 .lookup = nfs4_proc_lookup,
5511 .access = nfs4_proc_access,
5512 .readlink = nfs4_proc_readlink,
1da177e4
LT		 5513 .create = nfs4_proc_create,
5514 .remove = nfs4_proc_remove,
5515 .unlink_setup = nfs4_proc_unlink_setup,
5516 .unlink_done = nfs4_proc_unlink_done,
5517 .rename = nfs4_proc_rename,
d3d4152a
JL		 5518 .rename_setup = nfs4_proc_rename_setup,
5519 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 5520 .link = nfs4_proc_link,
5521 .symlink = nfs4_proc_symlink,
5522 .mkdir = nfs4_proc_mkdir,
5523 .rmdir = nfs4_proc_remove,
5524 .readdir = nfs4_proc_readdir,
5525 .mknod = nfs4_proc_mknod,
5526 .statfs = nfs4_proc_statfs,
5527 .fsinfo = nfs4_proc_fsinfo,
5528 .pathconf = nfs4_proc_pathconf,
e9326dca 5529 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 5530 .decode_dirent = nfs4_decode_dirent,
5531 .read_setup = nfs4_proc_read_setup,
ec06c096 5532 .read_done = nfs4_read_done,
1da177e4 5533 .write_setup = nfs4_proc_write_setup,
788e7a89 5534 .write_done = nfs4_write_done,
1da177e4 5535 .commit_setup = nfs4_proc_commit_setup,
788e7a89 5536 .commit_done = nfs4_commit_done,
1da177e4 5537 .lock = nfs4_proc_lock,
e50a1c2e 5538 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 5539 .close_context = nfs4_close_context,
2b484297 5540 .open_context = nfs4_atomic_open,
1da177e4
LT		 5541};
5542
5543/*
5544 * Local variables:
5545 * c-basic-offset: 8
5546 * End:
5547 */
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