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NFSv4: Fix a reboot recovery race when opening a file
[linux-2.6-block.git] / fs / nfs / nfs4proc.c
CommitLineData
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>
652f89f6
TM		 42#include <linux/ratelimit.h>
43#include <linux/printk.h>
5a0e3ad6 44#include <linux/slab.h>
1da177e4
LT		 45#include <linux/sunrpc/clnt.h>
46#include <linux/nfs.h>
47#include <linux/nfs4.h>
48#include <linux/nfs_fs.h>
49#include <linux/nfs_page.h>
9b7160c5 50#include <linux/nfs_mount.h>
1da177e4 51#include <linux/namei.h>
02a913a7 52#include <linux/mount.h>
99fe60d0 53#include <linux/module.h>
6926afd1 54#include <linux/nfs_idmap.h>
64c2ce8b 55#include <linux/xattr.h>
c7a360b0 56#include <linux/utsname.h>
d310310c 57#include <linux/freezer.h>
1da177e4 58
4ce79717 59#include "nfs4_fs.h"
1da177e4 60#include "delegation.h"
101070ca 61#include "internal.h"
006ea73e 62#include "iostat.h"
fc931582 63#include "callback.h"
b1f69b75 64#include "pnfs.h"
f092075d 65#include "netns.h"
73e39aaa 66#include "nfs4session.h"
de242c0b 67#include "fscache.h"
1da177e4
LT		 68
69#define NFSDBG_FACILITY NFSDBG_PROC
70
2066fe89 71#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 72#define NFS4_POLL_RETRY_MAX (15*HZ)
73
cdd4e68b 74struct nfs4_opendata;
864472e9 75static int _nfs4_proc_open(struct nfs4_opendata *data);
b257957e 76static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 77static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
9e33bed5 78static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
81934ddb 79static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
bae36241 80static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *);
9936781d 81static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
0ab64e0e
TM		 82static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
83 struct nfs_fattr *fattr, struct iattr *sattr,
84 struct nfs4_state *state);
f062eb6c 85#ifdef CONFIG_NFS_V4_1
1cab0652
BS		 86static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *);
87static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *);
f062eb6c 88#endif
1da177e4 89/* Prevent leaks of NFSv4 errors into userland */
46f72f57 90static int nfs4_map_errors(int err)
1da177e4 91{
52567b03
TM		 92 if (err >= -1000)
93 return err;
94 switch (err) {
95 case -NFS4ERR_RESOURCE:
96 return -EREMOTEIO;
7ebb9315
BS		 97 case -NFS4ERR_WRONGSEC:
98 return -EPERM;
3ddeb7c5
TM		 99 case -NFS4ERR_BADOWNER:
100 case -NFS4ERR_BADNAME:
101 return -EINVAL;
fb13bfa7
TM		 102 case -NFS4ERR_SHARE_DENIED:
103 return -EACCES;
f25efd85
SD		 104 case -NFS4ERR_MINOR_VERS_MISMATCH:
105 return -EPROTONOSUPPORT;
6168f62c
WAA		 106 case -NFS4ERR_ACCESS:
107 return -EACCES;
52567b03 108 default:
1da177e4 109 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 110 __func__, -err);
52567b03 111 break;
1da177e4 112 }
52567b03 113 return -EIO;
1da177e4
LT		 114}
115
116/*
117 * This is our standard bitmap for GETATTR requests.
118 */
1549210f 119const u32 nfs4_fattr_bitmap[3] = {
1da177e4
LT		 120 FATTR4_WORD0_TYPE
121 | FATTR4_WORD0_CHANGE
122 | FATTR4_WORD0_SIZE
123 | FATTR4_WORD0_FSID
124 | FATTR4_WORD0_FILEID,
125 FATTR4_WORD1_MODE
126 | FATTR4_WORD1_NUMLINKS
127 | FATTR4_WORD1_OWNER
128 | FATTR4_WORD1_OWNER_GROUP
129 | FATTR4_WORD1_RAWDEV
130 | FATTR4_WORD1_SPACE_USED
131 | FATTR4_WORD1_TIME_ACCESS
132 | FATTR4_WORD1_TIME_METADATA
133 | FATTR4_WORD1_TIME_MODIFY
134};
135
1549210f
TM		 136static const u32 nfs4_pnfs_open_bitmap[3] = {
137 FATTR4_WORD0_TYPE
138 | FATTR4_WORD0_CHANGE
139 | FATTR4_WORD0_SIZE
140 | FATTR4_WORD0_FSID
141 | FATTR4_WORD0_FILEID,
142 FATTR4_WORD1_MODE
143 | FATTR4_WORD1_NUMLINKS
144 | FATTR4_WORD1_OWNER
145 | FATTR4_WORD1_OWNER_GROUP
146 | FATTR4_WORD1_RAWDEV
147 | FATTR4_WORD1_SPACE_USED
148 | FATTR4_WORD1_TIME_ACCESS
149 | FATTR4_WORD1_TIME_METADATA
150 | FATTR4_WORD1_TIME_MODIFY,
151 FATTR4_WORD2_MDSTHRESHOLD
152};
153
e23008ec
AA		 154static const u32 nfs4_open_noattr_bitmap[3] = {
155 FATTR4_WORD0_TYPE
156 | FATTR4_WORD0_CHANGE
157 | FATTR4_WORD0_FILEID,
158};
159
1da177e4
LT		 160const u32 nfs4_statfs_bitmap[2] = {
161 FATTR4_WORD0_FILES_AVAIL
162 | FATTR4_WORD0_FILES_FREE
163 | FATTR4_WORD0_FILES_TOTAL,
164 FATTR4_WORD1_SPACE_AVAIL
165 | FATTR4_WORD1_SPACE_FREE
166 | FATTR4_WORD1_SPACE_TOTAL
167};
168
4ce79717 169const u32 nfs4_pathconf_bitmap[2] = {
1da177e4
LT		 170 FATTR4_WORD0_MAXLINK
171 | FATTR4_WORD0_MAXNAME,
172 0
173};
174
dae100c2 175const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
1da177e4
LT		 176 | FATTR4_WORD0_MAXREAD
177 | FATTR4_WORD0_MAXWRITE
178 | FATTR4_WORD0_LEASE_TIME,
55b6e774 179 FATTR4_WORD1_TIME_DELTA
dae100c2
FI		 180 | FATTR4_WORD1_FS_LAYOUT_TYPES,
181 FATTR4_WORD2_LAYOUT_BLKSIZE
1da177e4
LT		 182};
183
830b8e33
MN		 184const u32 nfs4_fs_locations_bitmap[2] = {
185 FATTR4_WORD0_TYPE
186 | FATTR4_WORD0_CHANGE
187 | FATTR4_WORD0_SIZE
188 | FATTR4_WORD0_FSID
189 | FATTR4_WORD0_FILEID
190 | FATTR4_WORD0_FS_LOCATIONS,
191 FATTR4_WORD1_MODE
192 | FATTR4_WORD1_NUMLINKS
193 | FATTR4_WORD1_OWNER
194 | FATTR4_WORD1_OWNER_GROUP
195 | FATTR4_WORD1_RAWDEV
196 | FATTR4_WORD1_SPACE_USED
197 | FATTR4_WORD1_TIME_ACCESS
198 | FATTR4_WORD1_TIME_METADATA
199 | FATTR4_WORD1_TIME_MODIFY
200 | FATTR4_WORD1_MOUNTED_ON_FILEID
201};
202
bc4785cd 203static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 204 struct nfs4_readdir_arg *readdir)
205{
0dbb4c67 206 __be32 *start, *p;
1da177e4 207
1da177e4 208 if (cookie > 2) {
b7ef1956 209 readdir->cookie = cookie;
1da177e4
LT		 210 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
211 return;
212 }
213
214 readdir->cookie = 0;
215 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
216 if (cookie == 2)
217 return;
218
219 /*
220 * NFSv4 servers do not return entries for '.' and '..'
221 * Therefore, we fake these entries here. We let '.'
222 * have cookie 0 and '..' have cookie 1. Note that
223 * when talking to the server, we always send cookie 0
224 * instead of 1 or 2.
225 */
2b86ce2d 226 start = p = kmap_atomic(*readdir->pages);
1da177e4
LT		 227
228 if (cookie == 0) {
229 *p++ = xdr_one; /* next */
230 *p++ = xdr_zero; /* cookie, first word */
231 *p++ = xdr_one; /* cookie, second word */
232 *p++ = xdr_one; /* entry len */
233 memcpy(p, ".\0\0\0", 4); /* entry */
234 p++;
235 *p++ = xdr_one; /* bitmap length */
236 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
237 *p++ = htonl(8); /* attribute buffer length */
4e769b93 238 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 239 }
240
241 *p++ = xdr_one; /* next */
242 *p++ = xdr_zero; /* cookie, first word */
243 *p++ = xdr_two; /* cookie, second word */
244 *p++ = xdr_two; /* entry len */
245 memcpy(p, "..\0\0", 4); /* entry */
246 p++;
247 *p++ = xdr_one; /* bitmap length */
248 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
249 *p++ = htonl(8); /* attribute buffer length */
4e769b93 250 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 251
252 readdir->pgbase = (char *)p - (char *)start;
253 readdir->count -= readdir->pgbase;
2b86ce2d 254 kunmap_atomic(start);
1da177e4
LT		 255}
256
65de872e
TM		 257static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
258{
259 int res = 0;
260
261 might_sleep();
262
263 if (*timeout <= 0)
264 *timeout = NFS4_POLL_RETRY_MIN;
265 if (*timeout > NFS4_POLL_RETRY_MAX)
266 *timeout = NFS4_POLL_RETRY_MAX;
d310310c 267 freezable_schedule_timeout_killable(*timeout);
65de872e
TM		 268 if (fatal_signal_pending(current))
269 res = -ERESTARTSYS;
270 *timeout <<= 1;
271 return res;
272}
273
274/* This is the error handling routine for processes that are allowed
275 * to sleep.
276 */
b064eca2 277static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
65de872e
TM		 278{
279 struct nfs_client *clp = server->nfs_client;
9e33bed5 280 struct nfs4_state *state = exception->state;
3114ea7a 281 struct inode *inode = exception->inode;
65de872e
TM		 282 int ret = errorcode;
283
284 exception->retry = 0;
285 switch(errorcode) {
286 case 0:
287 return 0;
3114ea7a 288 case -NFS4ERR_OPENMODE:
011e2a7f 289 if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
57ec14c5 290 nfs4_inode_return_delegation(inode);
3114ea7a
TM		 291 exception->retry = 1;
292 return 0;
293 }
294 if (state == NULL)
295 break;
296 nfs4_schedule_stateid_recovery(server, state);
297 goto wait_on_recovery;
a1d0b5ee 298 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 299 case -NFS4ERR_ADMIN_REVOKED:
300 case -NFS4ERR_BAD_STATEID:
9e33bed5
TM		 301 if (state == NULL)
302 break;
14977489 303 nfs_remove_bad_delegation(state->inode);
0400a6b0
TM		 304 nfs4_schedule_stateid_recovery(server, state);
305 goto wait_on_recovery;
0ced63d1
TM		 306 case -NFS4ERR_EXPIRED:
307 if (state != NULL)
308 nfs4_schedule_stateid_recovery(server, state);
65de872e 309 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 310 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 311 nfs4_schedule_lease_recovery(clp);
312 goto wait_on_recovery;
03391693 313#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 314 case -NFS4ERR_BADSESSION:
315 case -NFS4ERR_BADSLOT:
316 case -NFS4ERR_BAD_HIGH_SLOT:
317 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
318 case -NFS4ERR_DEADSESSION:
319 case -NFS4ERR_SEQ_FALSE_RETRY:
320 case -NFS4ERR_SEQ_MISORDERED:
321 dprintk("%s ERROR: %d Reset session\n", __func__,
322 errorcode);
9f594791 323 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
399f11c3 324 goto wait_on_recovery;
03391693 325#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 326 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 327 if (exception->timeout > HZ) {
328 /* We have retried a decent amount, time to
329 * fail
330 */
331 ret = -EBUSY;
332 break;
333 }
65de872e
TM		 334 case -NFS4ERR_GRACE:
335 case -NFS4ERR_DELAY:
336 ret = nfs4_delay(server->client, &exception->timeout);
337 if (ret != 0)
338 break;
a8a4ae3a 339 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 340 case -NFS4ERR_OLD_STATEID:
341 exception->retry = 1;
b064eca2
TM		 342 break;
343 case -NFS4ERR_BADOWNER:
344 /* The following works around a Linux server bug! */
345 case -NFS4ERR_BADNAME:
346 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
347 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
348 exception->retry = 1;
349 printk(KERN_WARNING "NFS: v4 server %s "
350 "does not accept raw "
351 "uid/gids. "
352 "Reenabling the idmapper.\n",
353 server->nfs_client->cl_hostname);
354 }
65de872e
TM		 355 }
356 /* We failed to handle the error */
357 return nfs4_map_errors(ret);
0400a6b0 358wait_on_recovery:
a2c0b9e2
TM		 359 ret = nfs4_wait_clnt_recover(clp);
360 if (ret == 0)
361 exception->retry = 1;
362 return ret;
65de872e
TM		 363}
364
365
452e9352 366static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 367{
1da177e4
LT		 368 spin_lock(&clp->cl_lock);
369 if (time_before(clp->cl_last_renewal,timestamp))
370 clp->cl_last_renewal = timestamp;
371 spin_unlock(&clp->cl_lock);
372}
373
452e9352
TM		 374static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
375{
376 do_renew_lease(server->nfs_client, timestamp);
377}
378
cccef3b9
AA		 379#if defined(CONFIG_NFS_V4_1)
380
d185a334 381static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871 382{
e3725ec0 383 struct nfs4_session *session;
13615871 384 struct nfs4_slot_table *tbl;
c10e4498 385 bool send_new_highest_used_slotid = false;
13615871 386
dfb4f309 387 if (!res->sr_slot) {
13615871
AA		 388 /* just wake up the next guy waiting since
389 * we may have not consumed a slot after all */
691daf3b 390 dprintk("%s: No slot\n", __func__);
35dc1d74 391 return;
13615871 392 }
e3725ec0
TM		 393 tbl = res->sr_slot->table;
394 session = tbl->session;
ea028ac9 395
35dc1d74 396 spin_lock(&tbl->slot_tbl_lock);
c10e4498
TM		 397 /* Be nice to the server: try to ensure that the last transmitted
398 * value for highest_user_slotid <= target_highest_slotid
399 */
400 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
401 send_new_highest_used_slotid = true;
402
b75ad4cd
TM		 403 if (nfs41_wake_and_assign_slot(tbl, res->sr_slot)) {
404 send_new_highest_used_slotid = false;
405 goto out_unlock;
406 }
f4af6e2a 407 nfs4_free_slot(tbl, res->sr_slot);
c10e4498
TM		 408
409 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
410 send_new_highest_used_slotid = false;
b75ad4cd 411out_unlock:
35dc1d74 412 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 413 res->sr_slot = NULL;
c10e4498
TM		 414 if (send_new_highest_used_slotid)
415 nfs41_server_notify_highest_slotid_update(session->clp);
13615871
AA		 416}
417
14516c3a 418static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c 419{
e3725ec0 420 struct nfs4_session *session;
933602e3 421 struct nfs4_slot *slot;
14516c3a 422 struct nfs_client *clp;
ac20d163 423 bool interrupted = false;
85563073 424 int ret = 1;
b0df806c 425
468f8613
BS		 426 /* don't increment the sequence number if the task wasn't sent */
427 if (!RPC_WAS_SENT(task))
b0df806c
AA		 428 goto out;
429
933602e3 430 slot = res->sr_slot;
e3725ec0 431 session = slot->table->session;
933602e3 432
ac20d163
TM		 433 if (slot->interrupted) {
434 slot->interrupted = 0;
435 interrupted = true;
436 }
437
691daf3b 438 /* Check the SEQUENCE operation status */
14516c3a
TM		 439 switch (res->sr_status) {
440 case 0:
b0df806c 441 /* Update the slot's sequence and clientid lease timer */
933602e3 442 ++slot->seq_nr;
e3725ec0 443 clp = session->clp;
8e63b6a8 444 do_renew_lease(clp, res->sr_timestamp);
0629e370 445 /* Check sequence flags */
b4410c2f
TM		 446 if (res->sr_status_flags != 0)
447 nfs4_schedule_lease_recovery(clp);
464ee9f9 448 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a 449 break;
ac20d163
TM		 450 case 1:
451 /*
452 * sr_status remains 1 if an RPC level error occurred.
453 * The server may or may not have processed the sequence
454 * operation..
455 * Mark the slot as having hosted an interrupted RPC call.
456 */
457 slot->interrupted = 1;
458 goto out;
14516c3a
TM		 459 case -NFS4ERR_DELAY:
460 /* The server detected a resend of the RPC call and
461 * returned NFS4ERR_DELAY as per Section 2.10.6.2
462 * of RFC5661.
463 */
df2fabff 464 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 465 __func__,
df2fabff 466 slot->slot_nr,
933602e3 467 slot->seq_nr);
14516c3a 468 goto out_retry;
85563073
TM		 469 case -NFS4ERR_BADSLOT:
470 /*
471 * The slot id we used was probably retired. Try again
472 * using a different slot id.
473 */
e8794440
TM		 474 goto retry_nowait;
475 case -NFS4ERR_SEQ_MISORDERED:
ac20d163
TM		 476 /*
477 * Was the last operation on this sequence interrupted?
478 * If so, retry after bumping the sequence number.
479 */
480 if (interrupted) {
481 ++slot->seq_nr;
482 goto retry_nowait;
483 }
e8794440
TM		 484 /*
485 * Could this slot have been previously retired?
486 * If so, then the server may be expecting seq_nr = 1!
487 */
8e63b6a8
TM		 488 if (slot->seq_nr != 1) {
489 slot->seq_nr = 1;
490 goto retry_nowait;
491 }
492 break;
e8794440
TM		 493 case -NFS4ERR_SEQ_FALSE_RETRY:
494 ++slot->seq_nr;
495 goto retry_nowait;
14516c3a
TM		 496 default:
497 /* Just update the slot sequence no. */
933602e3 498 ++slot->seq_nr;
b0df806c
AA		 499 }
500out:
501 /* The session may be reset by one of the error handlers. */
502 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 503 nfs41_sequence_free_slot(res);
85563073 504 return ret;
e8794440
TM		 505retry_nowait:
506 if (rpc_restart_call_prepare(task)) {
507 task->tk_status = 0;
508 ret = 0;
509 }
510 goto out;
14516c3a 511out_retry:
d05dd4e9 512 if (!rpc_restart_call(task))
14516c3a
TM		 513 goto out;
514 rpc_delay(task, NFS4_POLL_RETRY_MAX);
515 return 0;
b0df806c
AA		 516}
517
14516c3a
TM		 518static int nfs4_sequence_done(struct rpc_task *task,
519 struct nfs4_sequence_res *res)
df896455 520{
e3725ec0 521 if (res->sr_slot == NULL)
14516c3a
TM		 522 return 1;
523 return nfs41_sequence_done(task, res);
df896455
TM		 524}
525
9d12b216
TM		 526static void nfs41_init_sequence(struct nfs4_sequence_args *args,
527 struct nfs4_sequence_res *res, int cache_reply)
528{
2b2fa717 529 args->sa_slot = NULL;
9d12b216 530 args->sa_cache_this = 0;
8fe72bac 531 args->sa_privileged = 0;
9d12b216
TM		 532 if (cache_reply)
533 args->sa_cache_this = 1;
9d12b216
TM		 534 res->sr_slot = NULL;
535}
536
8fe72bac
TM		 537static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
538{
539 args->sa_privileged = 1;
540}
541
dc70d7b3 542int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 543 struct nfs4_sequence_args *args,
544 struct nfs4_sequence_res *res,
ce5039c1
AA		 545 struct rpc_task *task)
546{
fbcd4abc
AA		 547 struct nfs4_slot *slot;
548 struct nfs4_slot_table *tbl;
fbcd4abc
AA		 549
550 dprintk("--> %s\n", __func__);
ce5039c1 551 /* slot already allocated? */
dfb4f309 552 if (res->sr_slot != NULL)
d9afbd1b 553 goto out_success;
ce5039c1 554
fbcd4abc
AA		 555 tbl = &session->fc_slot_table;
556
69d206b5
TM		 557 task->tk_timeout = 0;
558
fbcd4abc 559 spin_lock(&tbl->slot_tbl_lock);
a2118c33 560 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
8fe72bac 561 !args->sa_privileged) {
0b1c8fc4 562 /* The state manager will wait until the slot table is empty */
0b1c8fc4 563 dprintk("%s session is draining\n", __func__);
7b939a3f 564 goto out_sleep;
689cf5c1
AB		 565 }
566
2dc03b7f 567 slot = nfs4_alloc_slot(tbl);
69d206b5
TM		 568 if (IS_ERR(slot)) {
569 /* If out of memory, try again in 1/4 second */
570 if (slot == ERR_PTR(-ENOMEM))
571 task->tk_timeout = HZ >> 2;
fbcd4abc 572 dprintk("<-- %s: no free slots\n", __func__);
7b939a3f 573 goto out_sleep;
fbcd4abc
AA		 574 }
575 spin_unlock(&tbl->slot_tbl_lock);
576
2b2fa717 577 args->sa_slot = slot;
fbcd4abc 578
2dc03b7f
TM		 579 dprintk("<-- %s slotid=%d seqid=%d\n", __func__,
580 slot->slot_nr, slot->seq_nr);
fbcd4abc 581
dfb4f309 582 res->sr_slot = slot;
8e63b6a8 583 res->sr_timestamp = jiffies;
2a6e26cd 584 res->sr_status_flags = 0;
fbcd4abc
AA		 585 /*
586 * sr_status is only set in decode_sequence, and so will remain
587 * set to 1 if an rpc level failure occurs.
588 */
589 res->sr_status = 1;
d9afbd1b
TM		 590out_success:
591 rpc_call_start(task);
ce5039c1 592 return 0;
7b939a3f 593out_sleep:
8fe72bac
TM		 594 /* Privileged tasks are queued with top priority */
595 if (args->sa_privileged)
1e1093c7
TM		 596 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
597 NULL, RPC_PRIORITY_PRIVILEGED);
598 else
599 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
7b939a3f
TM		 600 spin_unlock(&tbl->slot_tbl_lock);
601 return -EAGAIN;
ce5039c1 602}
dc70d7b3 603EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 604
035168ab 605int nfs4_setup_sequence(const struct nfs_server *server,
ce5039c1
AA		 606 struct nfs4_sequence_args *args,
607 struct nfs4_sequence_res *res,
ce5039c1
AA		 608 struct rpc_task *task)
609{
035168ab 610 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 611 int ret = 0;
612
d9afbd1b
TM		 613 if (session == NULL) {
614 rpc_call_start(task);
035168ab 615 goto out;
d9afbd1b 616 }
035168ab 617
df2fabff 618 dprintk("--> %s clp %p session %p sr_slot %d\n",
dfb4f309 619 __func__, session->clp, session, res->sr_slot ?
df2fabff 620 res->sr_slot->slot_nr : -1);
ce5039c1 621
9d12b216 622 ret = nfs41_setup_sequence(session, args, res, task);
ce5039c1
AA		 623out:
624 dprintk("<-- %s status=%d\n", __func__, ret);
625 return ret;
626}
627
628struct nfs41_call_sync_data {
035168ab 629 const struct nfs_server *seq_server;
ce5039c1
AA		 630 struct nfs4_sequence_args *seq_args;
631 struct nfs4_sequence_res *seq_res;
ce5039c1
AA		 632};
633
634static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
635{
636 struct nfs41_call_sync_data *data = calldata;
6ba7db34 637 struct nfs4_session *session = nfs4_get_session(data->seq_server);
ce5039c1 638
035168ab
TM		 639 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
640
d9afbd1b 641 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
ce5039c1
AA		 642}
643
69ab40c4
AA		 644static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
645{
646 struct nfs41_call_sync_data *data = calldata;
647
14516c3a 648 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 649}
650
17280175 651static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 652 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 653 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 654};
655
7c513058
BS		 656static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
657 struct nfs_server *server,
ce5039c1
AA		 658 struct rpc_message *msg,
659 struct nfs4_sequence_args *args,
8fe72bac 660 struct nfs4_sequence_res *res)
ce5039c1
AA		 661{
662 int ret;
663 struct rpc_task *task;
664 struct nfs41_call_sync_data data = {
035168ab 665 .seq_server = server,
ce5039c1
AA		 666 .seq_args = args,
667 .seq_res = res,
ce5039c1
AA		 668 };
669 struct rpc_task_setup task_setup = {
7c513058 670 .rpc_client = clnt,
ce5039c1
AA		 671 .rpc_message = msg,
672 .callback_ops = &nfs41_call_sync_ops,
673 .callback_data = &data
674 };
675
ce5039c1
AA		 676 task = rpc_run_task(&task_setup);
677 if (IS_ERR(task))
678 ret = PTR_ERR(task);
679 else {
680 ret = task->tk_status;
681 rpc_put_task(task);
682 }
683 return ret;
684}
685
df896455 686#else
8fe72bac 687static
9d12b216
TM		 688void nfs41_init_sequence(struct nfs4_sequence_args *args,
689 struct nfs4_sequence_res *res, int cache_reply)
690{
691}
692
8fe72bac
TM		 693static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
694{
695}
696
697
14516c3a
TM		 698static int nfs4_sequence_done(struct rpc_task *task,
699 struct nfs4_sequence_res *res)
df896455 700{
14516c3a 701 return 1;
df896455 702}
cccef3b9
AA		 703#endif /* CONFIG_NFS_V4_1 */
704
fd0c0953 705static
7c513058
BS		 706int _nfs4_call_sync(struct rpc_clnt *clnt,
707 struct nfs_server *server,
cccef3b9
AA		 708 struct rpc_message *msg,
709 struct nfs4_sequence_args *args,
fd0c0953 710 struct nfs4_sequence_res *res)
cccef3b9 711{
7c513058 712 return rpc_call_sync(clnt, msg, 0);
cccef3b9
AA		 713}
714
fd0c0953 715static
7c513058
BS		 716int nfs4_call_sync(struct rpc_clnt *clnt,
717 struct nfs_server *server,
e73b83f2
BS		 718 struct rpc_message *msg,
719 struct nfs4_sequence_args *args,
720 struct nfs4_sequence_res *res,
721 int cache_reply)
722{
fd0c0953 723 nfs41_init_sequence(args, res, cache_reply);
7c513058 724 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
fd0c0953 725 args, res);
e73b83f2 726}
cccef3b9 727
38478b24 728static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 729{
38478b24 730 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 731
38478b24 732 spin_lock(&dir->i_lock);
359d7d1c 733 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 734 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 735 nfs_force_lookup_revalidate(dir);
a9a4a87a 736 dir->i_version = cinfo->after;
de242c0b 737 nfs_fscache_invalidate(dir);
38478b24 738 spin_unlock(&dir->i_lock);
1da177e4
LT		 739}
740
e56e0b78 741struct nfs4_opendata {
c6d00e63 742 struct kref kref;
e56e0b78
TM		 743 struct nfs_openargs o_arg;
744 struct nfs_openres o_res;
cdd4e68b
TM		 745 struct nfs_open_confirmargs c_arg;
746 struct nfs_open_confirmres c_res;
6926afd1
TM		 747 struct nfs4_string owner_name;
748 struct nfs4_string group_name;
e56e0b78 749 struct nfs_fattr f_attr;
e56e0b78 750 struct dentry *dir;
82a2c1b7 751 struct dentry *dentry;
e56e0b78 752 struct nfs4_state_owner *owner;
aac00a8d 753 struct nfs4_state *state;
e56e0b78 754 struct iattr attrs;
26e976a8 755 unsigned long timestamp;
3e309914 756 unsigned int rpc_done : 1;
24ac23ab
TM		 757 int rpc_status;
758 int cancelled;
e56e0b78
TM		 759};
760
2ced46c2
TM		 761
762static void nfs4_init_opendata_res(struct nfs4_opendata *p)
763{
764 p->o_res.f_attr = &p->f_attr;
c1d51931
TM		 765 p->o_res.seqid = p->o_arg.seqid;
766 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 767 p->o_res.server = p->o_arg.server;
5f657530 768 p->o_res.access_request = p->o_arg.access;
2ced46c2 769 nfs_fattr_init(&p->f_attr);
6926afd1 770 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 771}
772
82a2c1b7 773static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 774 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be
TM		 775 const struct iattr *attrs,
776 gfp_t gfp_mask)
e56e0b78 777{
82a2c1b7 778 struct dentry *parent = dget_parent(dentry);
e56e0b78
TM		 779 struct inode *dir = parent->d_inode;
780 struct nfs_server *server = NFS_SERVER(dir);
781 struct nfs4_opendata *p;
782
8535b2be 783 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 784 if (p == NULL)
785 goto err;
8535b2be 786 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78
TM		 787 if (p->o_arg.seqid == NULL)
788 goto err_free;
82a2c1b7
AV		 789 nfs_sb_active(dentry->d_sb);
790 p->dentry = dget(dentry);
e56e0b78
TM		 791 p->dir = parent;
792 p->owner = sp;
793 atomic_inc(&sp->so_count);
794 p->o_arg.fh = NFS_FH(dir);
dc0b027d
TM		 795 p->o_arg.open_flags = flags;
796 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
ae2bb032
WAA		 797 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
798 * will return permission denied for all bits until close */
799 if (!(flags & O_EXCL)) {
800 /* ask server to check for all possible rights as results
801 * are cached */
802 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
803 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
ae2bb032 804 }
7539bbab 805 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 806 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
807 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 808 p->o_arg.name = &dentry->d_name;
e56e0b78
TM		 809 p->o_arg.server = server;
810 p->o_arg.bitmask = server->attr_bitmask;
1549210f 811 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
e56e0b78 812 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
536e43d1 813 if (attrs != NULL && attrs->ia_valid != 0) {
cd93710e 814 __be32 verf[2];
d77d76ff 815
e56e0b78
TM		 816 p->o_arg.u.attrs = &p->attrs;
817 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 818
819 verf[0] = jiffies;
820 verf[1] = current->pid;
821 memcpy(p->o_arg.u.verifier.data, verf,
822 sizeof(p->o_arg.u.verifier.data));
e56e0b78 823 }
cdd4e68b
TM		 824 p->c_arg.fh = &p->o_res.fh;
825 p->c_arg.stateid = &p->o_res.stateid;
826 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 827 nfs4_init_opendata_res(p);
c6d00e63 828 kref_init(&p->kref);
e56e0b78
TM		 829 return p;
830err_free:
831 kfree(p);
832err:
833 dput(parent);
834 return NULL;
835}
836
c6d00e63 837static void nfs4_opendata_free(struct kref *kref)
e56e0b78 838{
c6d00e63
TM		 839 struct nfs4_opendata *p = container_of(kref,
840 struct nfs4_opendata, kref);
82a2c1b7 841 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 842
843 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 844 if (p->state != NULL)
845 nfs4_put_open_state(p->state);
c6d00e63
TM		 846 nfs4_put_state_owner(p->owner);
847 dput(p->dir);
82a2c1b7
AV		 848 dput(p->dentry);
849 nfs_sb_deactive(sb);
6926afd1 850 nfs_fattr_free_names(&p->f_attr);
c6d00e63
TM		 851 kfree(p);
852}
853
854static void nfs4_opendata_put(struct nfs4_opendata *p)
855{
856 if (p != NULL)
857 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 858}
859
06f814a3
TM		 860static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
861{
06f814a3
TM		 862 int ret;
863
06f814a3 864 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 865 return ret;
866}
867
dc0b027d 868static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 869{
870 int ret = 0;
dc0b027d 871
536e43d1 872 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 873 goto out;
874 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 875 case FMODE_READ:
88069f77
TM		 876 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
877 && state->n_rdonly != 0;
6ee41268
TM		 878 break;
879 case FMODE_WRITE:
88069f77
TM		 880 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
881 && state->n_wronly != 0;
6ee41268
TM		 882 break;
883 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 884 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
885 && state->n_rdwr != 0;
6ee41268 886 }
dc0b027d 887out:
6ee41268
TM		 888 return ret;
889}
890
dc0b027d 891static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 892{
652f89f6
TM		 893 if (delegation == NULL)
894 return 0;
dc0b027d 895 if ((delegation->type & fmode) != fmode)
aac00a8d 896 return 0;
15c831bf 897 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 898 return 0;
d25be546
TM		 899 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
900 return 0;
b7391f44 901 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 902 return 1;
903}
904
dc0b027d 905static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 906{
dc0b027d 907 switch (fmode) {
e7616923
TM		 908 case FMODE_WRITE:
909 state->n_wronly++;
910 break;
911 case FMODE_READ:
912 state->n_rdonly++;
913 break;
914 case FMODE_READ|FMODE_WRITE:
915 state->n_rdwr++;
916 }
dc0b027d 917 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 918}
919
dc0b027d 920static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 921{
922 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 923 nfs4_stateid_copy(&state->stateid, stateid);
924 nfs4_stateid_copy(&state->open_stateid, stateid);
dc0b027d 925 switch (fmode) {
003707c7
TM		 926 case FMODE_READ:
927 set_bit(NFS_O_RDONLY_STATE, &state->flags);
928 break;
929 case FMODE_WRITE:
930 set_bit(NFS_O_WRONLY_STATE, &state->flags);
931 break;
932 case FMODE_READ|FMODE_WRITE:
933 set_bit(NFS_O_RDWR_STATE, &state->flags);
934 }
e7616923
TM		 935}
936
dc0b027d 937static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 938{
8bda4e4c 939 write_seqlock(&state->seqlock);
dc0b027d 940 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 941 write_sequnlock(&state->seqlock);
003707c7
TM		 942}
943
dc0b027d 944static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 945{
8bda4e4c
TM		 946 /*
947 * Protect the call to nfs4_state_set_mode_locked and
948 * serialise the stateid update
949 */
950 write_seqlock(&state->seqlock);
003707c7 951 if (deleg_stateid != NULL) {
f597c537 952 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 953 set_bit(NFS_DELEGATED_STATE, &state->flags);
954 }
955 if (open_stateid != NULL)
dc0b027d 956 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 957 write_sequnlock(&state->seqlock);
958 spin_lock(&state->owner->so_lock);
dc0b027d 959 update_open_stateflags(state, fmode);
ec073428 960 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 961}
962
dc0b027d 963static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 964{
965 struct nfs_inode *nfsi = NFS_I(state->inode);
966 struct nfs_delegation *deleg_cur;
967 int ret = 0;
968
dc0b027d 969 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 970
971 rcu_read_lock();
972 deleg_cur = rcu_dereference(nfsi->delegation);
973 if (deleg_cur == NULL)
974 goto no_delegation;
975
976 spin_lock(&deleg_cur->lock);
977 if (nfsi->delegation != deleg_cur ||
d25be546 978 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 979 (deleg_cur->type & fmode) != fmode)
34310430
TM		 980 goto no_delegation_unlock;
981
982 if (delegation == NULL)
983 delegation = &deleg_cur->stateid;
f597c537 984 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 985 goto no_delegation_unlock;
986
b7391f44 987 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 988 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 989 ret = 1;
990no_delegation_unlock:
991 spin_unlock(&deleg_cur->lock);
992no_delegation:
993 rcu_read_unlock();
994
995 if (!ret && open_stateid != NULL) {
dc0b027d 996 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 997 ret = 1;
998 }
999
1000 return ret;
1001}
1002
1003
dc0b027d 1004static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1005{
1006 struct nfs_delegation *delegation;
1007
1008 rcu_read_lock();
1009 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1010 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1011 rcu_read_unlock();
1012 return;
1013 }
1014 rcu_read_unlock();
57ec14c5 1015 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1016}
1017
6ee41268 1018static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1019{
1020 struct nfs4_state *state = opendata->state;
1021 struct nfs_inode *nfsi = NFS_I(state->inode);
1022 struct nfs_delegation *delegation;
536e43d1 1023 int open_mode = opendata->o_arg.open_flags & (O_EXCL|O_TRUNC);
dc0b027d 1024 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1025 nfs4_stateid stateid;
1026 int ret = -EAGAIN;
1027
aac00a8d 1028 for (;;) {
dc0b027d 1029 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 1030 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 1031 if (can_open_cached(state, fmode, open_mode)) {
1032 update_open_stateflags(state, fmode);
6ee41268 1033 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 1034 goto out_return_state;
1035 }
1036 spin_unlock(&state->owner->so_lock);
1037 }
34310430
TM		 1038 rcu_read_lock();
1039 delegation = rcu_dereference(nfsi->delegation);
652f89f6 1040 if (!can_open_delegated(delegation, fmode)) {
34310430 1041 rcu_read_unlock();
aac00a8d 1042 break;
34310430 1043 }
aac00a8d 1044 /* Save the delegation */
f597c537 1045 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1046 rcu_read_unlock();
af22f94a 1047 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM		 1048 if (ret != 0)
1049 goto out;
1050 ret = -EAGAIN;
34310430
TM		 1051
1052 /* Try to update the stateid using the delegation */
dc0b027d 1053 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1054 goto out_return_state;
aac00a8d 1055 }
aac00a8d
TM		 1056out:
1057 return ERR_PTR(ret);
1058out_return_state:
1059 atomic_inc(&state->count);
1060 return state;
1061}
1062
e23008ec
AA		 1063static void
1064nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1065{
1066 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1067 struct nfs_delegation *delegation;
1068 int delegation_flags = 0;
1069
1070 rcu_read_lock();
1071 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1072 if (delegation)
1073 delegation_flags = delegation->flags;
1074 rcu_read_unlock();
1075 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1076 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1077 "returning a delegation for "
1078 "OPEN(CLAIM_DELEGATE_CUR)\n",
1079 clp->cl_hostname);
1080 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1081 nfs_inode_set_delegation(state->inode,
1082 data->owner->so_cred,
1083 &data->o_res);
1084 else
1085 nfs_inode_reclaim_delegation(state->inode,
1086 data->owner->so_cred,
1087 &data->o_res);
1088}
1089
1090/*
1091 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1092 * and update the nfs4_state.
1093 */
1094static struct nfs4_state *
1095_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1096{
1097 struct inode *inode = data->state->inode;
1098 struct nfs4_state *state = data->state;
1099 int ret;
1100
1101 if (!data->rpc_done) {
1102 ret = data->rpc_status;
1103 goto err;
1104 }
1105
1106 ret = -ESTALE;
1107 if (!(data->f_attr.valid & NFS_ATTR_FATTR_TYPE) ||
1108 !(data->f_attr.valid & NFS_ATTR_FATTR_FILEID) ||
1109 !(data->f_attr.valid & NFS_ATTR_FATTR_CHANGE))
1110 goto err;
1111
1112 ret = -ENOMEM;
1113 state = nfs4_get_open_state(inode, data->owner);
1114 if (state == NULL)
1115 goto err;
1116
1117 ret = nfs_refresh_inode(inode, &data->f_attr);
1118 if (ret)
1119 goto err;
1120
1121 if (data->o_res.delegation_type != 0)
1122 nfs4_opendata_check_deleg(data, state);
1123 update_open_stateid(state, &data->o_res.stateid, NULL,
1124 data->o_arg.fmode);
1125
1126 return state;
1127err:
1128 return ERR_PTR(ret);
1129
1130}
1131
1132static struct nfs4_state *
1133_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1134{
1135 struct inode *inode;
1136 struct nfs4_state *state = NULL;
1b370bc2 1137 int ret;
24ac23ab 1138
aac00a8d 1139 if (!data->rpc_done) {
6ee41268 1140 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1141 goto out;
1142 }
1143
1b370bc2 1144 ret = -EAGAIN;
24ac23ab 1145 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1146 goto err;
24ac23ab 1147 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 1148 ret = PTR_ERR(inode);
03f28e3a 1149 if (IS_ERR(inode))
1b370bc2
TM		 1150 goto err;
1151 ret = -ENOMEM;
24ac23ab
TM		 1152 state = nfs4_get_open_state(inode, data->owner);
1153 if (state == NULL)
1b370bc2 1154 goto err_put_inode;
e23008ec
AA		 1155 if (data->o_res.delegation_type != 0)
1156 nfs4_opendata_check_deleg(data, state);
34310430 1157 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1158 data->o_arg.fmode);
24ac23ab 1159 iput(inode);
aac00a8d 1160out:
24ac23ab 1161 return state;
1b370bc2
TM		 1162err_put_inode:
1163 iput(inode);
1164err:
1165 return ERR_PTR(ret);
24ac23ab
TM		 1166}
1167
e23008ec
AA		 1168static struct nfs4_state *
1169nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1170{
1171 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1172 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1173 return _nfs4_opendata_to_nfs4_state(data);
1174}
1175
864472e9
TM		 1176static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1177{
1178 struct nfs_inode *nfsi = NFS_I(state->inode);
1179 struct nfs_open_context *ctx;
1180
1181 spin_lock(&state->inode->i_lock);
1182 list_for_each_entry(ctx, &nfsi->open_files, list) {
1183 if (ctx->state != state)
1184 continue;
1185 get_nfs_open_context(ctx);
1186 spin_unlock(&state->inode->i_lock);
1187 return ctx;
1188 }
1189 spin_unlock(&state->inode->i_lock);
1190 return ERR_PTR(-ENOENT);
1191}
1192
6f220ed5
TM		 1193static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1194{
1195 struct nfs4_opendata *opendata;
1196
3d4ff43d 1197 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, NULL, GFP_NOFS);
6f220ed5
TM		 1198 if (opendata == NULL)
1199 return ERR_PTR(-ENOMEM);
1200 opendata->state = state;
1201 atomic_inc(&state->count);
1202 return opendata;
1203}
1204
dc0b027d 1205static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1206{
2ced46c2 1207 struct nfs4_state *newstate;
864472e9
TM		 1208 int ret;
1209
dc0b027d
TM		 1210 opendata->o_arg.open_flags = 0;
1211 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1212 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1213 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1214 nfs4_init_opendata_res(opendata);
b257957e 1215 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1216 if (ret != 0)
1217 return ret;
2ced46c2 1218 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1219 if (IS_ERR(newstate))
1220 return PTR_ERR(newstate);
643168c2 1221 nfs4_close_state(newstate, fmode);
2ced46c2 1222 *res = newstate;
864472e9
TM		 1223 return 0;
1224}
1225
1226static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1227{
864472e9 1228 struct nfs4_state *newstate;
864472e9
TM		 1229 int ret;
1230
1231 /* memory barrier prior to reading state->n_* */
2ced46c2 1232 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 1233 smp_rmb();
1234 if (state->n_rdwr != 0) {
b0ed9dbc 1235 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2ced46c2 1236 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1237 if (ret != 0)
1238 return ret;
2ced46c2
TM		 1239 if (newstate != state)
1240 return -ESTALE;
864472e9
TM		 1241 }
1242 if (state->n_wronly != 0) {
b0ed9dbc 1243 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2ced46c2 1244 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1245 if (ret != 0)
1246 return ret;
2ced46c2
TM		 1247 if (newstate != state)
1248 return -ESTALE;
864472e9
TM		 1249 }
1250 if (state->n_rdonly != 0) {
b0ed9dbc 1251 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2ced46c2 1252 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1253 if (ret != 0)
1254 return ret;
2ced46c2
TM		 1255 if (newstate != state)
1256 return -ESTALE;
864472e9 1257 }
1ac7e2fd
TM		 1258 /*
1259 * We may have performed cached opens for all three recoveries.
1260 * Check if we need to update the current stateid.
1261 */
1262 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1263 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1264 write_seqlock(&state->seqlock);
1ac7e2fd 1265 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1266 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1267 write_sequnlock(&state->seqlock);
1ac7e2fd 1268 }
864472e9
TM		 1269 return 0;
1270}
1271
1da177e4
LT		 1272/*
1273 * OPEN_RECLAIM:
1274 * reclaim state on the server after a reboot.
1da177e4 1275 */
539cd03a 1276static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1277{
1ac7e2fd 1278 struct nfs_delegation *delegation;
864472e9 1279 struct nfs4_opendata *opendata;
dc0b027d 1280 fmode_t delegation_type = 0;
1da177e4
LT		 1281 int status;
1282
6f220ed5
TM		 1283 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1284 if (IS_ERR(opendata))
1285 return PTR_ERR(opendata);
864472e9
TM		 1286 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1287 opendata->o_arg.fh = NFS_FH(state->inode);
1ac7e2fd
TM		 1288 rcu_read_lock();
1289 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1290 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1291 delegation_type = delegation->type;
1ac7e2fd 1292 rcu_read_unlock();
864472e9
TM		 1293 opendata->o_arg.u.delegation_type = delegation_type;
1294 status = nfs4_open_recover(opendata, state);
c6d00e63 1295 nfs4_opendata_put(opendata);
1da177e4
LT		 1296 return status;
1297}
1298
539cd03a 1299static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1300{
1301 struct nfs_server *server = NFS_SERVER(state->inode);
1302 struct nfs4_exception exception = { };
1303 int err;
1304 do {
539cd03a 1305 err = _nfs4_do_open_reclaim(ctx, state);
168667c4 1306 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1307 break;
1308 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1309 } while (exception.retry);
1310 return err;
1311}
1312
864472e9
TM		 1313static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1314{
1315 struct nfs_open_context *ctx;
1316 int ret;
1317
1318 ctx = nfs4_state_find_open_context(state);
1319 if (IS_ERR(ctx))
1320 return PTR_ERR(ctx);
539cd03a 1321 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1322 put_nfs_open_context(ctx);
1323 return ret;
1324}
1325
13437e12 1326static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4 1327{
e56e0b78 1328 struct nfs4_opendata *opendata;
864472e9 1329 int ret;
1da177e4 1330
6f220ed5
TM		 1331 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1332 if (IS_ERR(opendata))
1333 return PTR_ERR(opendata);
e56e0b78 1334 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
f597c537 1335 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
864472e9 1336 ret = nfs4_open_recover(opendata, state);
c6d00e63 1337 nfs4_opendata_put(opendata);
864472e9 1338 return ret;
1da177e4
LT		 1339}
1340
13437e12 1341int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT		 1342{
1343 struct nfs4_exception exception = { };
539cd03a 1344 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT		 1345 int err;
1346 do {
13437e12 1347 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1da177e4
LT		 1348 switch (err) {
1349 case 0:
965b5d67
TM		 1350 case -ENOENT:
1351 case -ESTALE:
1352 goto out;
bcfa49f6
RL		 1353 case -NFS4ERR_BADSESSION:
1354 case -NFS4ERR_BADSLOT:
1355 case -NFS4ERR_BAD_HIGH_SLOT:
1356 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1357 case -NFS4ERR_DEADSESSION:
37380e42 1358 set_bit(NFS_DELEGATED_STATE, &state->flags);
9f594791 1359 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
37380e42 1360 err = -EAGAIN;
bcfa49f6 1361 goto out;
1da177e4
LT		 1362 case -NFS4ERR_STALE_CLIENTID:
1363 case -NFS4ERR_STALE_STATEID:
37380e42 1364 set_bit(NFS_DELEGATED_STATE, &state->flags);
1da177e4
LT		 1365 case -NFS4ERR_EXPIRED:
1366 /* Don't recall a delegation if it was lost */
0400a6b0 1367 nfs4_schedule_lease_recovery(server->nfs_client);
37380e42 1368 err = -EAGAIN;
965b5d67 1369 goto out;
a1d0b5ee 1370 case -NFS4ERR_DELEG_REVOKED:
965b5d67
TM		 1371 case -NFS4ERR_ADMIN_REVOKED:
1372 case -NFS4ERR_BAD_STATEID:
a1d0b5ee
TM		 1373 nfs_inode_find_state_and_recover(state->inode,
1374 stateid);
0400a6b0 1375 nfs4_schedule_stateid_recovery(server, state);
965b5d67
TM		 1376 case -ENOMEM:
1377 err = 0;
1378 goto out;
1da177e4 1379 }
37380e42 1380 set_bit(NFS_DELEGATED_STATE, &state->flags);
1da177e4
LT		 1381 err = nfs4_handle_exception(server, err, &exception);
1382 } while (exception.retry);
965b5d67 1383out:
1da177e4
LT		 1384 return err;
1385}
1386
cdd4e68b
TM		 1387static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1388{
1389 struct nfs4_opendata *data = calldata;
1390
1391 data->rpc_status = task->tk_status;
26e976a8 1392 if (data->rpc_status == 0) {
f597c537 1393 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1394 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1395 renew_lease(data->o_res.server, data->timestamp);
3e309914 1396 data->rpc_done = 1;
26e976a8 1397 }
cdd4e68b
TM		 1398}
1399
1400static void nfs4_open_confirm_release(void *calldata)
1401{
1402 struct nfs4_opendata *data = calldata;
1403 struct nfs4_state *state = NULL;
1404
1405 /* If this request hasn't been cancelled, do nothing */
1406 if (data->cancelled == 0)
1407 goto out_free;
1408 /* In case of error, no cleanup! */
3e309914 1409 if (!data->rpc_done)
cdd4e68b 1410 goto out_free;
cdd4e68b 1411 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1412 if (!IS_ERR(state))
643168c2 1413 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1414out_free:
c6d00e63 1415 nfs4_opendata_put(data);
cdd4e68b
TM		 1416}
1417
1418static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1419 .rpc_call_done = nfs4_open_confirm_done,
1420 .rpc_release = nfs4_open_confirm_release,
1421};
1422
1423/*
1424 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1425 */
1426static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1427{
1428 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1429 struct rpc_task *task;
5138fde0
TM		 1430 struct rpc_message msg = {
1431 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1432 .rpc_argp = &data->c_arg,
1433 .rpc_resp = &data->c_res,
1434 .rpc_cred = data->owner->so_cred,
1435 };
c970aa85
TM		 1436 struct rpc_task_setup task_setup_data = {
1437 .rpc_client = server->client,
5138fde0 1438 .rpc_message = &msg,
c970aa85
TM		 1439 .callback_ops = &nfs4_open_confirm_ops,
1440 .callback_data = data,
101070ca 1441 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1442 .flags = RPC_TASK_ASYNC,
1443 };
1da177e4
LT		 1444 int status;
1445
c6d00e63 1446 kref_get(&data->kref);
3e309914
TM		 1447 data->rpc_done = 0;
1448 data->rpc_status = 0;
5138fde0 1449 data->timestamp = jiffies;
c970aa85 1450 task = rpc_run_task(&task_setup_data);
7a1218a2 1451 if (IS_ERR(task))
cdd4e68b 1452 return PTR_ERR(task);
cdd4e68b
TM		 1453 status = nfs4_wait_for_completion_rpc_task(task);
1454 if (status != 0) {
1455 data->cancelled = 1;
1456 smp_wmb();
1457 } else
1458 status = data->rpc_status;
e6b3c4db 1459 rpc_put_task(task);
1da177e4
LT		 1460 return status;
1461}
1462
24ac23ab 1463static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1464{
24ac23ab
TM		 1465 struct nfs4_opendata *data = calldata;
1466 struct nfs4_state_owner *sp = data->owner;
5138fde0 1467
24ac23ab
TM		 1468 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1469 return;
aac00a8d
TM		 1470 /*
1471 * Check if we still need to send an OPEN call, or if we can use
1472 * a delegation instead.
1473 */
1474 if (data->state != NULL) {
1475 struct nfs_delegation *delegation;
1476
dc0b027d 1477 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1478 goto out_no_action;
aac00a8d
TM		 1479 rcu_read_lock();
1480 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6
TM		 1481 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
1482 can_open_delegated(delegation, data->o_arg.fmode))
1483 goto unlock_no_action;
aac00a8d
TM		 1484 rcu_read_unlock();
1485 }
95b72eb0 1486 /* Update client id. */
1f0e890d 1487 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
6f220ed5 1488 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
5138fde0 1489 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
e23008ec 1490 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
6f220ed5
TM		 1491 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1492 }
26e976a8 1493 data->timestamp = jiffies;
035168ab 1494 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1495 &data->o_arg.seq_args,
2240a9e2
TM		 1496 &data->o_res.seq_res,
1497 task) != 0)
1498 nfs_release_seqid(data->o_arg.seqid);
6ee41268 1499 return;
652f89f6
TM		 1500unlock_no_action:
1501 rcu_read_unlock();
6ee41268
TM		 1502out_no_action:
1503 task->tk_action = NULL;
b75ad4cd 1504 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 1505}
1506
24ac23ab
TM		 1507static void nfs4_open_done(struct rpc_task *task, void *calldata)
1508{
1509 struct nfs4_opendata *data = calldata;
1da177e4 1510
24ac23ab 1511 data->rpc_status = task->tk_status;
d898528c 1512
14516c3a
TM		 1513 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1514 return;
d898528c 1515
24ac23ab 1516 if (task->tk_status == 0) {
807d66d8
TM		 1517 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1518 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1519 case S_IFREG:
1520 break;
1521 case S_IFLNK:
24ac23ab 1522 data->rpc_status = -ELOOP;
6f926b5b
TM		 1523 break;
1524 case S_IFDIR:
24ac23ab 1525 data->rpc_status = -EISDIR;
6f926b5b
TM		 1526 break;
1527 default:
24ac23ab 1528 data->rpc_status = -ENOTDIR;
807d66d8 1529 }
6f926b5b 1530 }
26e976a8 1531 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1532 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1533 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1534 }
3e309914 1535 data->rpc_done = 1;
24ac23ab 1536}
6f926b5b 1537
24ac23ab
TM		 1538static void nfs4_open_release(void *calldata)
1539{
1540 struct nfs4_opendata *data = calldata;
1541 struct nfs4_state *state = NULL;
1542
1543 /* If this request hasn't been cancelled, do nothing */
1544 if (data->cancelled == 0)
1545 goto out_free;
1546 /* In case of error, no cleanup! */
3e309914 1547 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1548 goto out_free;
1549 /* In case we need an open_confirm, no cleanup! */
1550 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1551 goto out_free;
24ac23ab 1552 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1553 if (!IS_ERR(state))
643168c2 1554 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1555out_free:
c6d00e63 1556 nfs4_opendata_put(data);
24ac23ab
TM		 1557}
1558
1559static const struct rpc_call_ops nfs4_open_ops = {
1560 .rpc_call_prepare = nfs4_open_prepare,
1561 .rpc_call_done = nfs4_open_done,
1562 .rpc_release = nfs4_open_release,
1563};
1564
b257957e 1565static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1566{
1567 struct inode *dir = data->dir->d_inode;
1568 struct nfs_server *server = NFS_SERVER(dir);
1569 struct nfs_openargs *o_arg = &data->o_arg;
1570 struct nfs_openres *o_res = &data->o_res;
1571 struct rpc_task *task;
5138fde0
TM		 1572 struct rpc_message msg = {
1573 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1574 .rpc_argp = o_arg,
1575 .rpc_resp = o_res,
1576 .rpc_cred = data->owner->so_cred,
1577 };
c970aa85
TM		 1578 struct rpc_task_setup task_setup_data = {
1579 .rpc_client = server->client,
5138fde0 1580 .rpc_message = &msg,
c970aa85
TM		 1581 .callback_ops = &nfs4_open_ops,
1582 .callback_data = data,
101070ca 1583 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1584 .flags = RPC_TASK_ASYNC,
1585 };
24ac23ab
TM		 1586 int status;
1587
9d12b216 1588 nfs41_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1589 kref_get(&data->kref);
3e309914
TM		 1590 data->rpc_done = 0;
1591 data->rpc_status = 0;
2ced46c2 1592 data->cancelled = 0;
b257957e 1593 if (isrecover)
8fe72bac 1594 nfs4_set_sequence_privileged(&o_arg->seq_args);
c970aa85 1595 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1596 if (IS_ERR(task))
1597 return PTR_ERR(task);
1598 status = nfs4_wait_for_completion_rpc_task(task);
1599 if (status != 0) {
1600 data->cancelled = 1;
1601 smp_wmb();
1602 } else
1603 status = data->rpc_status;
1604 rpc_put_task(task);
1605
1606 return status;
1607}
1608
1609static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1610{
1611 struct inode *dir = data->dir->d_inode;
1612 struct nfs_openres *o_res = &data->o_res;
1613 int status;
1614
1615 status = nfs4_run_open_task(data, 1);
1616 if (status != 0 || !data->rpc_done)
1617 return status;
1618
6926afd1
TM		 1619 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1620
b257957e
AB		 1621 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1622 status = _nfs4_proc_open_confirm(data);
1623 if (status != 0)
1624 return status;
1625 }
1626
1627 return status;
1628}
1629
6168f62c
WAA		 1630static int nfs4_opendata_access(struct rpc_cred *cred,
1631 struct nfs4_opendata *opendata,
f8d9a897
WAA		 1632 struct nfs4_state *state, fmode_t fmode,
1633 int openflags)
6168f62c
WAA		 1634{
1635 struct nfs_access_entry cache;
1636 u32 mask;
1637
1638 /* access call failed or for some reason the server doesn't
1639 * support any access modes -- defer access call until later */
1640 if (opendata->o_res.access_supported == 0)
1641 return 0;
1642
1643 mask = 0;
bbd3a8ee 1644 /* don't check MAY_WRITE - a newly created file may not have
f8d9a897
WAA		 1645 * write mode bits, but POSIX allows the creating process to write.
1646 * use openflags to check for exec, because fmode won't
1647 * always have FMODE_EXEC set when file open for exec. */
1648 if (openflags & __FMODE_EXEC) {
1649 /* ONLY check for exec rights */
1650 mask = MAY_EXEC;
1651 } else if (fmode & FMODE_READ)
1652 mask = MAY_READ;
6168f62c
WAA		 1653
1654 cache.cred = cred;
1655 cache.jiffies = jiffies;
1656 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1657 nfs_access_add_cache(state->inode, &cache);
1658
bbd3a8ee 1659 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 1660 return 0;
1661
1662 /* even though OPEN succeeded, access is denied. Close the file */
1663 nfs4_close_state(state, fmode);
998f40b5 1664 return -EACCES;
6168f62c
WAA		 1665}
1666
b257957e
AB		 1667/*
1668 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1669 */
1670static int _nfs4_proc_open(struct nfs4_opendata *data)
1671{
1672 struct inode *dir = data->dir->d_inode;
1673 struct nfs_server *server = NFS_SERVER(dir);
1674 struct nfs_openargs *o_arg = &data->o_arg;
1675 struct nfs_openres *o_res = &data->o_res;
1676 int status;
1677
1678 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 1679 if (!data->rpc_done)
1680 return status;
1681 if (status != 0) {
1682 if (status == -NFS4ERR_BADNAME &&
1683 !(o_arg->open_flags & O_CREAT))
1684 return -ENOENT;
24ac23ab 1685 return status;
08ef7bd3 1686 }
24ac23ab 1687
6926afd1
TM		 1688 nfs_fattr_map_and_free_names(server, &data->f_attr);
1689
90ff0c54 1690 if (o_arg->open_flags & O_CREAT)
56ae19f3 1691 update_changeattr(dir, &o_res->cinfo);
0df5dd4a
TM		 1692 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1693 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1694 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1695 status = _nfs4_proc_open_confirm(data);
1da177e4 1696 if (status != 0)
24ac23ab 1697 return status;
1da177e4
LT		 1698 }
1699 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1700 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1701 return 0;
1da177e4
LT		 1702}
1703
d83217c1
AA		 1704static int nfs4_recover_expired_lease(struct nfs_server *server)
1705{
1706 return nfs4_client_recover_expired_lease(server->nfs_client);
1707}
1708
1da177e4
LT		 1709/*
1710 * OPEN_EXPIRED:
1711 * reclaim state on the server after a network partition.
1712 * Assumes caller holds the appropriate lock
1713 */
539cd03a 1714static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1715{
e56e0b78 1716 struct nfs4_opendata *opendata;
864472e9 1717 int ret;
1da177e4 1718
6f220ed5
TM		 1719 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1720 if (IS_ERR(opendata))
1721 return PTR_ERR(opendata);
864472e9 1722 ret = nfs4_open_recover(opendata, state);
35d05778 1723 if (ret == -ESTALE)
3d4ff43d 1724 d_drop(ctx->dentry);
c6d00e63 1725 nfs4_opendata_put(opendata);
864472e9 1726 return ret;
1da177e4
LT		 1727}
1728
a9ed2e25 1729static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1730{
539cd03a 1731 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1732 struct nfs4_exception exception = { };
1733 int err;
1734
1735 do {
539cd03a 1736 err = _nfs4_open_expired(ctx, state);
a9ed2e25
TM		 1737 switch (err) {
1738 default:
1739 goto out;
1740 case -NFS4ERR_GRACE:
1741 case -NFS4ERR_DELAY:
1742 nfs4_handle_exception(server, err, &exception);
1743 err = 0;
1744 }
202b50dc 1745 } while (exception.retry);
a9ed2e25 1746out:
202b50dc
TM		 1747 return err;
1748}
1749
1da177e4
LT		 1750static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1751{
1da177e4 1752 struct nfs_open_context *ctx;
864472e9 1753 int ret;
1da177e4 1754
864472e9
TM		 1755 ctx = nfs4_state_find_open_context(state);
1756 if (IS_ERR(ctx))
1757 return PTR_ERR(ctx);
539cd03a 1758 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1759 put_nfs_open_context(ctx);
1760 return ret;
1da177e4
LT		 1761}
1762
f062eb6c 1763#if defined(CONFIG_NFS_V4_1)
3e60ffdd 1764static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
f062eb6c 1765{
f062eb6c 1766 struct nfs_server *server = NFS_SERVER(state->inode);
3e60ffdd
CL		 1767 nfs4_stateid *stateid = &state->stateid;
1768 int status;
1769
1770 /* If a state reset has been done, test_stateid is unneeded */
1771 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1772 return;
1773
1774 status = nfs41_test_stateid(server, stateid);
1775 if (status != NFS_OK) {
1776 /* Free the stateid unless the server explicitly
1777 * informs us the stateid is unrecognized. */
1778 if (status != -NFS4ERR_BAD_STATEID)
1779 nfs41_free_stateid(server, stateid);
6938867e 1780 nfs_remove_bad_delegation(state->inode);
3e60ffdd 1781
6938867e
BS		 1782 write_seqlock(&state->seqlock);
1783 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1784 write_sequnlock(&state->seqlock);
3e60ffdd
CL		 1785 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1786 }
1787}
1788
1789/**
1790 * nfs41_check_open_stateid - possibly free an open stateid
1791 *
1792 * @state: NFSv4 state for an inode
1793 *
1794 * Returns NFS_OK if recovery for this stateid is now finished.
1795 * Otherwise a negative NFS4ERR value is returned.
1796 */
1797static int nfs41_check_open_stateid(struct nfs4_state *state)
1798{
1799 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 1800 nfs4_stateid *stateid = &state->open_stateid;
3e60ffdd
CL		 1801 int status;
1802
1803 /* If a state reset has been done, test_stateid is unneeded */
1804 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
1805 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
1806 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
1807 return -NFS4ERR_BAD_STATEID;
1808
1809 status = nfs41_test_stateid(server, stateid);
1810 if (status != NFS_OK) {
1811 /* Free the stateid unless the server explicitly
1812 * informs us the stateid is unrecognized. */
1813 if (status != -NFS4ERR_BAD_STATEID)
1814 nfs41_free_stateid(server, stateid);
1815
1816 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1817 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1818 clear_bit(NFS_O_RDWR_STATE, &state->flags);
b01dd1d8
BS		 1819 }
1820 return status;
1821}
1822
1823static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1824{
eb64cf96 1825 int status;
b01dd1d8 1826
3e60ffdd
CL		 1827 nfs41_clear_delegation_stateid(state);
1828 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 1829 if (status != NFS_OK)
1830 status = nfs4_open_expired(sp, state);
1831 return status;
f062eb6c
BS		 1832}
1833#endif
1834
aa53ed54
JL		 1835/*
1836 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1837 * fields corresponding to attributes that were used to store the verifier.
1838 * Make sure we clobber those fields in the later setattr call
1839 */
1840static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1841{
1842 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1843 !(sattr->ia_valid & ATTR_ATIME_SET))
1844 sattr->ia_valid |= ATTR_ATIME;
1845
1846 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1847 !(sattr->ia_valid & ATTR_MTIME_SET))
1848 sattr->ia_valid |= ATTR_MTIME;
1849}
1850
c21443c2
TM		 1851static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
1852 fmode_t fmode,
1853 int flags,
1854 struct nfs4_state **res)
1855{
1856 struct nfs4_state_owner *sp = opendata->owner;
1857 struct nfs_server *server = sp->so_server;
1858 struct nfs4_state *state;
1859 unsigned int seq;
1860 int ret;
1861
1862 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
1863
1864 ret = _nfs4_proc_open(opendata);
1865 if (ret != 0)
1866 goto out;
1867
1868 state = nfs4_opendata_to_nfs4_state(opendata);
1869 ret = PTR_ERR(state);
1870 if (IS_ERR(state))
1871 goto out;
1872 if (server->caps & NFS_CAP_POSIX_LOCK)
1873 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
1874
1875 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
1876 if (ret != 0)
1877 goto out;
1878
1879 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
1880 nfs4_schedule_stateid_recovery(server, state);
1881 nfs4_wait_clnt_recover(server->nfs_client);
1882 }
1883 *res = state;
1884out:
1885 return ret;
1886}
1887
1da177e4 1888/*
24ac23ab 1889 * Returns a referenced nfs4_state
1da177e4 1890 */
82be417a
AA		 1891static int _nfs4_do_open(struct inode *dir,
1892 struct dentry *dentry,
1893 fmode_t fmode,
1894 int flags,
1895 struct iattr *sattr,
1896 struct rpc_cred *cred,
1897 struct nfs4_state **res,
1898 struct nfs4_threshold **ctx_th)
1da177e4
LT		 1899{
1900 struct nfs4_state_owner *sp;
1901 struct nfs4_state *state = NULL;
1902 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1903 struct nfs4_opendata *opendata;
aac00a8d 1904 int status;
1da177e4
LT		 1905
1906 /* Protect against reboot recovery conflicts */
1da177e4 1907 status = -ENOMEM;
d1e284d5
TM		 1908 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
1909 if (sp == NULL) {
1da177e4
LT		 1910 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1911 goto out_err;
1912 }
58d9714a
TM		 1913 status = nfs4_recover_expired_lease(server);
1914 if (status != 0)
b4454fe1 1915 goto err_put_state_owner;
82a2c1b7
AV		 1916 if (dentry->d_inode != NULL)
1917 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 1918 status = -ENOMEM;
82a2c1b7 1919 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr, GFP_KERNEL);
e56e0b78 1920 if (opendata == NULL)
95d35cb4 1921 goto err_put_state_owner;
1da177e4 1922
82be417a
AA		 1923 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
1924 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
1925 if (!opendata->f_attr.mdsthreshold)
1926 goto err_opendata_put;
1549210f 1927 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 1928 }
82a2c1b7
AV		 1929 if (dentry->d_inode != NULL)
1930 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 1931
c21443c2 1932 status = _nfs4_open_and_get_state(opendata, fmode, flags, &state);
6168f62c
WAA		 1933 if (status != 0)
1934 goto err_opendata_put;
1935
0ab64e0e
TM		 1936 if (opendata->o_arg.open_flags & O_EXCL) {
1937 nfs4_exclusive_attrset(opendata, sattr);
1938
1939 nfs_fattr_init(opendata->o_res.f_attr);
1940 status = nfs4_do_setattr(state->inode, cred,
1941 opendata->o_res.f_attr, sattr,
1942 state);
1943 if (status == 0)
1944 nfs_setattr_update_inode(state->inode, sattr);
1945 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
1946 }
82be417a
AA		 1947
1948 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
1949 *ctx_th = opendata->f_attr.mdsthreshold;
1950 else
1951 kfree(opendata->f_attr.mdsthreshold);
1952 opendata->f_attr.mdsthreshold = NULL;
1953
c6d00e63 1954 nfs4_opendata_put(opendata);
1da177e4 1955 nfs4_put_state_owner(sp);
1da177e4
LT		 1956 *res = state;
1957 return 0;
c6d00e63 1958err_opendata_put:
82be417a 1959 kfree(opendata->f_attr.mdsthreshold);
c6d00e63 1960 nfs4_opendata_put(opendata);
e56e0b78
TM		 1961err_put_state_owner:
1962 nfs4_put_state_owner(sp);
1da177e4 1963out_err:
1da177e4
LT		 1964 *res = NULL;
1965 return status;
1966}
1967
1968
82be417a
AA		 1969static struct nfs4_state *nfs4_do_open(struct inode *dir,
1970 struct dentry *dentry,
1971 fmode_t fmode,
1972 int flags,
1973 struct iattr *sattr,
1974 struct rpc_cred *cred,
1975 struct nfs4_threshold **ctx_th)
1da177e4
LT		 1976{
1977 struct nfs4_exception exception = { };
1978 struct nfs4_state *res;
1979 int status;
1980
6168f62c 1981 fmode &= FMODE_READ|FMODE_WRITE|FMODE_EXEC;
1da177e4 1982 do {
82be417a
AA		 1983 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred,
1984 &res, ctx_th);
1da177e4
LT		 1985 if (status == 0)
1986 break;
1987 /* NOTE: BAD_SEQID means the server and client disagree about the
1988 * book-keeping w.r.t. state-changing operations
1989 * (OPEN/CLOSE/LOCK/LOCKU...)
1990 * It is actually a sign of a bug on the client or on the server.
1991 *
1992 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1993 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 1994 * have unhashed the old state_owner for us, and that we can
1995 * therefore safely retry using a new one. We should still warn
1996 * the user though...
1997 */
1998 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 1999 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2000 " returned a bad sequence-id error!\n",
2001 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2002 exception.retry = 1;
2003 continue;
2004 }
550f5747
TM		 2005 /*
2006 * BAD_STATEID on OPEN means that the server cancelled our
2007 * state before it received the OPEN_CONFIRM.
2008 * Recover by retrying the request as per the discussion
2009 * on Page 181 of RFC3530.
2010 */
2011 if (status == -NFS4ERR_BAD_STATEID) {
2012 exception.retry = 1;
2013 continue;
2014 }
aac00a8d
TM		 2015 if (status == -EAGAIN) {
2016 /* We must have found a delegation */
2017 exception.retry = 1;
2018 continue;
2019 }
1da177e4
LT		 2020 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
2021 status, &exception));
2022 } while (exception.retry);
2023 return res;
2024}
2025
659bfcd6
TM		 2026static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2027 struct nfs_fattr *fattr, struct iattr *sattr,
2028 struct nfs4_state *state)
1da177e4 2029{
3e4f6290 2030 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2031 struct nfs_setattrargs arg = {
3e4f6290 2032 .fh = NFS_FH(inode),
1da177e4
LT		 2033 .iap = sattr,
2034 .server = server,
2035 .bitmask = server->attr_bitmask,
2036 };
2037 struct nfs_setattrres res = {
2038 .fattr = fattr,
2039 .server = server,
2040 };
2041 struct rpc_message msg = {
659bfcd6
TM		 2042 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2043 .rpc_argp = &arg,
2044 .rpc_resp = &res,
2045 .rpc_cred = cred,
1da177e4 2046 };
26e976a8 2047 unsigned long timestamp = jiffies;
65e4308d 2048 int status;
1da177e4 2049
0e574af1 2050 nfs_fattr_init(fattr);
1da177e4 2051
4fc8796d 2052 if (state != NULL) {
2a369153
TM		 2053 struct nfs_lockowner lockowner = {
2054 .l_owner = current->files,
2055 .l_pid = current->tgid,
2056 };
4fc8796d 2057 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2a369153 2058 &lockowner);
4fc8796d
TM		 2059 } else if (nfs4_copy_delegation_stateid(&arg.stateid, inode,
2060 FMODE_WRITE)) {
3e4f6290 2061 /* Use that stateid */
08e9eac4 2062 } else
f597c537 2063 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2064
7c513058 2065 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2066 if (status == 0 && state != NULL)
2067 renew_lease(server, timestamp);
65e4308d 2068 return status;
1da177e4
LT		 2069}
2070
659bfcd6
TM		 2071static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2072 struct nfs_fattr *fattr, struct iattr *sattr,
2073 struct nfs4_state *state)
1da177e4 2074{
3e4f6290 2075 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2076 struct nfs4_exception exception = {
2077 .state = state,
3114ea7a 2078 .inode = inode,
a1d0b5ee 2079 };
1da177e4
LT		 2080 int err;
2081 do {
451146be
TM		 2082 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state);
2083 switch (err) {
2084 case -NFS4ERR_OPENMODE:
2085 if (state && !(state->state & FMODE_WRITE)) {
2086 err = -EBADF;
2087 if (sattr->ia_valid & ATTR_OPEN)
2088 err = -EACCES;
2089 goto out;
2090 }
2091 }
2092 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2093 } while (exception.retry);
451146be 2094out:
1da177e4
LT		 2095 return err;
2096}
2097
2098struct nfs4_closedata {
2099 struct inode *inode;
2100 struct nfs4_state *state;
2101 struct nfs_closeargs arg;
2102 struct nfs_closeres res;
516a6af6 2103 struct nfs_fattr fattr;
26e976a8 2104 unsigned long timestamp;
f7e8917a
FI		 2105 bool roc;
2106 u32 roc_barrier;
1da177e4
LT		 2107};
2108
963d8fe5 2109static void nfs4_free_closedata(void *data)
9512135d 2110{
963d8fe5
TM		 2111 struct nfs4_closedata *calldata = data;
2112 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2113 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2114
f7e8917a
FI		 2115 if (calldata->roc)
2116 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2117 nfs4_put_open_state(calldata->state);
2118 nfs_free_seqid(calldata->arg.seqid);
9512135d 2119 nfs4_put_state_owner(sp);
322b2b90 2120 nfs_sb_deactive(sb);
9512135d
TM		 2121 kfree(calldata);
2122}
2123
88069f77
TM		 2124static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2125 fmode_t fmode)
2126{
2127 spin_lock(&state->owner->so_lock);
2128 if (!(fmode & FMODE_READ))
2129 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2130 if (!(fmode & FMODE_WRITE))
2131 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2132 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2133 spin_unlock(&state->owner->so_lock);
2134}
2135
963d8fe5 2136static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2137{
963d8fe5 2138 struct nfs4_closedata *calldata = data;
1da177e4 2139 struct nfs4_state *state = calldata->state;
1da177e4
LT		 2140 struct nfs_server *server = NFS_SERVER(calldata->inode);
2141
a3ca5651 2142 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2143 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2144 return;
1da177e4
LT		 2145 /* hmm. we are done with the inode, and in the process of freeing
2146 * the state_owner. we keep this around to process errors
2147 */
1da177e4
LT		 2148 switch (task->tk_status) {
2149 case 0:
f7e8917a
FI		 2150 if (calldata->roc)
2151 pnfs_roc_set_barrier(state->inode,
2152 calldata->roc_barrier);
45328c35 2153 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 2154 renew_lease(server, calldata->timestamp);
88069f77
TM		 2155 nfs4_close_clear_stateid_flags(state,
2156 calldata->arg.fmode);
1da177e4
LT		 2157 break;
2158 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2159 case -NFS4ERR_OLD_STATEID:
2160 case -NFS4ERR_BAD_STATEID:
1da177e4 2161 case -NFS4ERR_EXPIRED:
dc0b027d 2162 if (calldata->arg.fmode == 0)
9e33bed5 2163 break;
1da177e4 2164 default:
72211dbe
TM		 2165 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2166 rpc_restart_call_prepare(task);
1da177e4 2167 }
72211dbe 2168 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2169 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2170 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2171}
2172
4ce70ada 2173static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2174{
4ce70ada 2175 struct nfs4_closedata *calldata = data;
9512135d 2176 struct nfs4_state *state = calldata->state;
7fdab069 2177 struct inode *inode = calldata->inode;
88069f77 2178 int call_close = 0;
9512135d 2179
a3ca5651 2180 dprintk("%s: begin!\n", __func__);
963d8fe5 2181 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 2182 return;
003707c7 2183
88069f77
TM		 2184 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2185 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 2186 spin_lock(&state->owner->so_lock);
003707c7 2187 /* Calculate the change in open mode */
e7616923 2188 if (state->n_rdwr == 0) {
003707c7 2189 if (state->n_rdonly == 0) {
88069f77
TM		 2190 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2191 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2192 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 2193 }
2194 if (state->n_wronly == 0) {
88069f77
TM		 2195 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2196 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2197 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 2198 }
e7616923 2199 }
4cecb76f 2200 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2201
2202 if (!call_close) {
963d8fe5
TM		 2203 /* Note: exit _without_ calling nfs4_close_done */
2204 task->tk_action = NULL;
b75ad4cd 2205 nfs4_sequence_done(task, &calldata->res.seq_res);
a3ca5651 2206 goto out;
9512135d 2207 }
88069f77 2208
f7e8917a 2209 if (calldata->arg.fmode == 0) {
88069f77 2210 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2211 if (calldata->roc &&
7fdab069 2212 pnfs_roc_drain(inode, &calldata->roc_barrier, task))
a3ca5651 2213 goto out;
f7e8917a 2214 }
88069f77 2215
516a6af6 2216 nfs_fattr_init(calldata->res.fattr);
26e976a8 2217 calldata->timestamp = jiffies;
7fdab069 2218 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2219 &calldata->arg.seq_args,
2220 &calldata->res.seq_res,
2240a9e2
TM		 2221 task) != 0)
2222 nfs_release_seqid(calldata->arg.seqid);
a3ca5651
CL		 2223out:
2224 dprintk("%s: done!\n", __func__);
1da177e4
LT		 2225}
2226
963d8fe5 2227static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2228 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2229 .rpc_call_done = nfs4_close_done,
2230 .rpc_release = nfs4_free_closedata,
2231};
2232
1da177e4
LT		 2233/*
2234 * It is possible for data to be read/written from a mem-mapped file
2235 * after the sys_close call (which hits the vfs layer as a flush).
2236 * This means that we can't safely call nfsv4 close on a file until
2237 * the inode is cleared. This in turn means that we are not good
2238 * NFSv4 citizens - we do not indicate to the server to update the file's
2239 * share state even when we are done with one of the three share
2240 * stateid's in the inode.
2241 *
2242 * NOTE: Caller must be holding the sp->so_owner semaphore!
2243 */
1f7977c1 2244int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2245{
4a35bd41 2246 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2247 struct nfs4_closedata *calldata;
b39e625b
TM		 2248 struct nfs4_state_owner *sp = state->owner;
2249 struct rpc_task *task;
5138fde0
TM		 2250 struct rpc_message msg = {
2251 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2252 .rpc_cred = state->owner->so_cred,
2253 };
c970aa85
TM		 2254 struct rpc_task_setup task_setup_data = {
2255 .rpc_client = server->client,
5138fde0 2256 .rpc_message = &msg,
c970aa85 2257 .callback_ops = &nfs4_close_ops,
101070ca 2258 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2259 .flags = RPC_TASK_ASYNC,
2260 };
9512135d 2261 int status = -ENOMEM;
1da177e4 2262
8535b2be 2263 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2264 if (calldata == NULL)
9512135d 2265 goto out;
9d12b216 2266 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2267 calldata->inode = state->inode;
1da177e4 2268 calldata->state = state;
4a35bd41 2269 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2270 calldata->arg.stateid = &state->open_stateid;
1da177e4 2271 /* Serialization for the sequence id */
8535b2be 2272 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2273 if (calldata->arg.seqid == NULL)
2274 goto out_free_calldata;
dc0b027d 2275 calldata->arg.fmode = 0;
a65318bf 2276 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2277 calldata->res.fattr = &calldata->fattr;
c1d51931 2278 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2279 calldata->res.server = server;
1f7977c1 2280 calldata->roc = pnfs_roc(state->inode);
643168c2 2281 nfs_sb_active(calldata->inode->i_sb);
9512135d 2282
1174dd1f
TM		 2283 msg.rpc_argp = &calldata->arg;
2284 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2285 task_setup_data.callback_data = calldata;
2286 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2287 if (IS_ERR(task))
2288 return PTR_ERR(task);
a49c3c77
TM		 2289 status = 0;
2290 if (wait)
2291 status = rpc_wait_for_completion_task(task);
b39e625b 2292 rpc_put_task(task);
a49c3c77 2293 return status;
9512135d
TM		 2294out_free_calldata:
2295 kfree(calldata);
2296out:
b39e625b
TM		 2297 nfs4_put_open_state(state);
2298 nfs4_put_state_owner(sp);
9512135d 2299 return status;
1da177e4
LT		 2300}
2301
2b484297 2302static struct inode *
cd9a1c0e 2303nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
1da177e4 2304{
1da177e4 2305 struct nfs4_state *state;
1da177e4 2306
565277f6 2307 /* Protect against concurrent sillydeletes */
82be417a
AA		 2308 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr,
2309 ctx->cred, &ctx->mdsthreshold);
f46e0bd3
TM		 2310 if (IS_ERR(state))
2311 return ERR_CAST(state);
cd9a1c0e 2312 ctx->state = state;
f46e0bd3 2313 return igrab(state->inode);
1da177e4
LT		 2314}
2315
1185a552 2316static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2317{
2318 if (ctx->state == NULL)
2319 return;
2320 if (is_sync)
643168c2 2321 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2322 else
643168c2 2323 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2324}
1da177e4
LT		 2325
2326static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2327{
43652ad5
BH		 2328 struct nfs4_server_caps_arg args = {
2329 .fhandle = fhandle,
2330 };
1da177e4
LT		 2331 struct nfs4_server_caps_res res = {};
2332 struct rpc_message msg = {
2333 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2334 .rpc_argp = &args,
1da177e4
LT		 2335 .rpc_resp = &res,
2336 };
2337 int status;
2338
7c513058 2339 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2340 if (status == 0) {
2341 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2342 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2343 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2344 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2345 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2346 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2347 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2348 server->caps |= NFS_CAP_ACLS;
2349 if (res.has_links != 0)
2350 server->caps |= NFS_CAP_HARDLINKS;
2351 if (res.has_symlinks != 0)
2352 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2353 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2354 server->caps |= NFS_CAP_FILEID;
2355 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2356 server->caps |= NFS_CAP_MODE;
2357 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2358 server->caps |= NFS_CAP_NLINK;
2359 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2360 server->caps |= NFS_CAP_OWNER;
2361 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2362 server->caps |= NFS_CAP_OWNER_GROUP;
2363 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2364 server->caps |= NFS_CAP_ATIME;
2365 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2366 server->caps |= NFS_CAP_CTIME;
2367 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2368 server->caps |= NFS_CAP_MTIME;
2369
a65318bf
TM		 2370 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2371 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2372 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4 2373 server->acl_bitmask = res.acl_bitmask;
264e6351 2374 server->fh_expire_type = res.fh_expire_type;
1da177e4 2375 }
cccef3b9 2376
1da177e4
LT		 2377 return status;
2378}
2379
55a97593 2380int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2381{
2382 struct nfs4_exception exception = { };
2383 int err;
2384 do {
2385 err = nfs4_handle_exception(server,
2386 _nfs4_server_capabilities(server, fhandle),
2387 &exception);
2388 } while (exception.retry);
2389 return err;
2390}
2391
2392static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2393 struct nfs_fsinfo *info)
2394{
1da177e4
LT		 2395 struct nfs4_lookup_root_arg args = {
2396 .bitmask = nfs4_fattr_bitmap,
2397 };
2398 struct nfs4_lookup_res res = {
2399 .server = server,
0e574af1 2400 .fattr = info->fattr,
1da177e4
LT		 2401 .fh = fhandle,
2402 };
2403 struct rpc_message msg = {
2404 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2405 .rpc_argp = &args,
2406 .rpc_resp = &res,
2407 };
008f55d0 2408
0e574af1 2409 nfs_fattr_init(info->fattr);
7c513058 2410 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2411}
2412
2413static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2414 struct nfs_fsinfo *info)
2415{
2416 struct nfs4_exception exception = { };
2417 int err;
2418 do {
fb8a5ba8
BS		 2419 err = _nfs4_lookup_root(server, fhandle, info);
2420 switch (err) {
2421 case 0:
2422 case -NFS4ERR_WRONGSEC:
05e9cfb4 2423 goto out;
fb8a5ba8
BS		 2424 default:
2425 err = nfs4_handle_exception(server, err, &exception);
2426 }
1da177e4 2427 } while (exception.retry);
05e9cfb4 2428out:
1da177e4
LT		 2429 return err;
2430}
2431
8f70e95f
BS		 2432static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2433 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2434{
2435 struct rpc_auth *auth;
2436 int ret;
2437
2438 auth = rpcauth_create(flavor, server->client);
e8d920c5 2439 if (IS_ERR(auth)) {
8f70e95f
BS		 2440 ret = -EIO;
2441 goto out;
2442 }
2443 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2444out:
2445 return ret;
2446}
2447
801a16dc 2448static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2449 struct nfs_fsinfo *info)
1da177e4 2450{
8f70e95f 2451 int i, len, status = 0;
0fabee24 2452 rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS];
1da177e4 2453
6a1a1e34 2454 len = rpcauth_list_flavors(flav_array, ARRAY_SIZE(flav_array));
4ea8fed5
TM		 2455 if (len < 0)
2456 return len;
8f70e95f
BS		 2457
2458 for (i = 0; i < len; i++) {
6a1a1e34
CL		 2459 /* AUTH_UNIX is the default flavor if none was specified,
2460 * thus has already been tried. */
2461 if (flav_array[i] == RPC_AUTH_UNIX)
2462 continue;
2463
8f70e95f 2464 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
fb8a5ba8 2465 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
d1a8016a
BS		 2466 continue;
2467 break;
8f70e95f 2468 }
fb8a5ba8
BS		 2469 /*
2470 * -EACCESS could mean that the user doesn't have correct permissions
2471 * to access the mount. It could also mean that we tried to mount
2472 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2473 * existing mount programs don't handle -EACCES very well so it should
2474 * be mapped to -EPERM instead.
2475 */
2476 if (status == -EACCES)
2477 status = -EPERM;
801a16dc
BS		 2478 return status;
2479}
2480
2481/*
2482 * get the file handle for the "/" directory on the server
2483 */
3028eb2b
BS		 2484int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
2485 struct nfs_fsinfo *info)
801a16dc 2486{
fca78d6d 2487 int minor_version = server->nfs_client->cl_minorversion;
801a16dc 2488 int status = nfs4_lookup_root(server, fhandle, info);
fb8a5ba8
BS		 2489 if ((status == -NFS4ERR_WRONGSEC) && !(server->flags & NFS_MOUNT_SECFLAVOUR))
2490 /*
2491 * A status of -NFS4ERR_WRONGSEC will be mapped to -EPERM
2492 * by nfs4_map_errors() as this function exits.
2493 */
fca78d6d 2494 status = nfs_v4_minor_ops[minor_version]->find_root_sec(server, fhandle, info);
1da177e4
LT		 2495 if (status == 0)
2496 status = nfs4_server_capabilities(server, fhandle);
2497 if (status == 0)
2498 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 2499 return nfs4_map_errors(status);
1da177e4
LT		 2500}
2501
bae36241
BS		 2502static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2503 struct nfs_fsinfo *info)
2504{
2505 int error;
2506 struct nfs_fattr *fattr = info->fattr;
2507
2508 error = nfs4_server_capabilities(server, mntfh);
2509 if (error < 0) {
2510 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2511 return error;
2512 }
2513
2514 error = nfs4_proc_getattr(server, mntfh, fattr);
2515 if (error < 0) {
2516 dprintk("nfs4_get_root: getattr error = %d\n", -error);
2517 return error;
2518 }
2519
2520 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2521 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2522 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2523
2524 return error;
2525}
2526
6b97fd3d
MN		 2527/*
2528 * Get locations and (maybe) other attributes of a referral.
2529 * Note that we'll actually follow the referral later when
2530 * we detect fsid mismatch in inode revalidation
2531 */
f05d147f
BS		 2532static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2533 const struct qstr *name, struct nfs_fattr *fattr,
2534 struct nfs_fh *fhandle)
6b97fd3d
MN		 2535{
2536 int status = -ENOMEM;
2537 struct page *page = NULL;
2538 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2539
2540 page = alloc_page(GFP_KERNEL);
2541 if (page == NULL)
2542 goto out;
2543 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2544 if (locations == NULL)
2545 goto out;
2546
f05d147f 2547 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 2548 if (status != 0)
2549 goto out;
2550 /* Make sure server returned a different fsid for the referral */
2551 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 2552 dprintk("%s: server did not return a different fsid for"
2553 " a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2554 status = -EIO;
2555 goto out;
2556 }
533eb461
AA		 2557 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2558 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 2559
533eb461 2560 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 2561 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 2562 memset(fhandle, 0, sizeof(struct nfs_fh));
2563out:
2564 if (page)
2565 __free_page(page);
5d7ca35a 2566 kfree(locations);
6b97fd3d
MN		 2567 return status;
2568}
2569
1da177e4
LT		 2570static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2571{
2572 struct nfs4_getattr_arg args = {
2573 .fh = fhandle,
2574 .bitmask = server->attr_bitmask,
2575 };
2576 struct nfs4_getattr_res res = {
2577 .fattr = fattr,
2578 .server = server,
2579 };
2580 struct rpc_message msg = {
2581 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2582 .rpc_argp = &args,
2583 .rpc_resp = &res,
2584 };
2585
0e574af1 2586 nfs_fattr_init(fattr);
7c513058 2587 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2588}
2589
2590static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2591{
2592 struct nfs4_exception exception = { };
2593 int err;
2594 do {
2595 err = nfs4_handle_exception(server,
2596 _nfs4_proc_getattr(server, fhandle, fattr),
2597 &exception);
2598 } while (exception.retry);
2599 return err;
2600}
2601
2602/*
2603 * The file is not closed if it is opened due to the a request to change
2604 * the size of the file. The open call will not be needed once the
2605 * VFS layer lookup-intents are implemented.
2606 *
2607 * Close is called when the inode is destroyed.
2608 * If we haven't opened the file for O_WRONLY, we
2609 * need to in the size_change case to obtain a stateid.
2610 *
2611 * Got race?
2612 * Because OPEN is always done by name in nfsv4, it is
2613 * possible that we opened a different file by the same
2614 * name. We can recognize this race condition, but we
2615 * can't do anything about it besides returning an error.
2616 *
2617 * This will be fixed with VFS changes (lookup-intent).
2618 */
2619static int
2620nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2621 struct iattr *sattr)
2622{
08e9eac4 2623 struct inode *inode = dentry->d_inode;
659bfcd6 2624 struct rpc_cred *cred = NULL;
d530838b 2625 struct nfs4_state *state = NULL;
1da177e4
LT		 2626 int status;
2627
8a1636c4
BH		 2628 if (pnfs_ld_layoutret_on_setattr(inode))
2629 pnfs_return_layout(inode);
2630
0e574af1 2631 nfs_fattr_init(fattr);
1da177e4 2632
2669940d
AA		 2633 /* Deal with open(O_TRUNC) */
2634 if (sattr->ia_valid & ATTR_OPEN)
2635 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
2636
2637 /* Optimization: if the end result is no change, don't RPC */
2638 if ((sattr->ia_valid & ~(ATTR_FILE)) == 0)
2639 return 0;
2640
d530838b 2641 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2642 if (sattr->ia_valid & ATTR_FILE) {
2643 struct nfs_open_context *ctx;
2644
2645 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2646 if (ctx) {
2647 cred = ctx->cred;
2648 state = ctx->state;
2649 }
659bfcd6 2650 }
08e9eac4 2651
659bfcd6 2652 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2653 if (status == 0)
2654 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2655 return status;
2656}
2657
0c2e53f1
TM		 2658static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2659 const struct qstr *name, struct nfs_fh *fhandle,
2660 struct nfs_fattr *fattr)
2b3de441 2661{
0c2e53f1 2662 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 2663 int status;
2664 struct nfs4_lookup_arg args = {
2665 .bitmask = server->attr_bitmask,
0c2e53f1 2666 .dir_fh = NFS_FH(dir),
2b3de441
DH		 2667 .name = name,
2668 };
2669 struct nfs4_lookup_res res = {
2670 .server = server,
2671 .fattr = fattr,
2672 .fh = fhandle,
2673 };
2674 struct rpc_message msg = {
2675 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2676 .rpc_argp = &args,
2677 .rpc_resp = &res,
2678 };
2679
2680 nfs_fattr_init(fattr);
2681
1da177e4 2682 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 2683 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2684 dprintk("NFS reply lookup: %d\n", status);
2685 return status;
2686}
2687
72de53ec 2688static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 2689{
7ebb9315 2690 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 2691 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 2692 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2693 fattr->nlink = 2;
2694}
2695
72de53ec
BS		 2696static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
2697 struct qstr *name, struct nfs_fh *fhandle,
2698 struct nfs_fattr *fattr)
1da177e4
LT		 2699{
2700 struct nfs4_exception exception = { };
72de53ec 2701 struct rpc_clnt *client = *clnt;
1da177e4
LT		 2702 int err;
2703 do {
72de53ec
BS		 2704 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr);
2705 switch (err) {
08ef7bd3 2706 case -NFS4ERR_BADNAME:
72de53ec
BS		 2707 err = -ENOENT;
2708 goto out;
0c2e53f1 2709 case -NFS4ERR_MOVED:
f05d147f 2710 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 2711 goto out;
0c2e53f1 2712 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 2713 err = -EPERM;
2714 if (client != *clnt)
2715 goto out;
2716
2717 client = nfs4_create_sec_client(client, dir, name);
2718 if (IS_ERR(client))
2719 return PTR_ERR(client);
2720
2721 exception.retry = 1;
2722 break;
2723 default:
2724 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 2725 }
1da177e4 2726 } while (exception.retry);
72de53ec
BS		 2727
2728out:
2729 if (err == 0)
2730 *clnt = client;
2731 else if (client != *clnt)
2732 rpc_shutdown_client(client);
2733
1da177e4
LT		 2734 return err;
2735}
2736
80a16b21 2737static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
72de53ec
BS		 2738 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2739{
2740 int status;
2741 struct rpc_clnt *client = NFS_CLIENT(dir);
2742
2743 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2744 if (client != NFS_CLIENT(dir)) {
2745 rpc_shutdown_client(client);
2746 nfs_fixup_secinfo_attributes(fattr);
2747 }
2748 return status;
2749}
2750
f05d147f
BS		 2751struct rpc_clnt *
2752nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
2753 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2754{
2755 int status;
2756 struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir));
2757
2758 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2759 if (status < 0) {
2760 rpc_shutdown_client(client);
2761 return ERR_PTR(status);
2762 }
2763 return client;
2764}
2765
1da177e4
LT		 2766static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2767{
76b32999 2768 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2769 struct nfs4_accessargs args = {
2770 .fh = NFS_FH(inode),
a4980e78 2771 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 2772 };
2773 struct nfs4_accessres res = {
2774 .server = server,
1da177e4 2775 };
1da177e4
LT		 2776 struct rpc_message msg = {
2777 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2778 .rpc_argp = &args,
2779 .rpc_resp = &res,
2780 .rpc_cred = entry->cred,
2781 };
2782 int mode = entry->mask;
2783 int status;
2784
2785 /*
2786 * Determine which access bits we want to ask for...
2787 */
2788 if (mode & MAY_READ)
2789 args.access |= NFS4_ACCESS_READ;
2790 if (S_ISDIR(inode->i_mode)) {
2791 if (mode & MAY_WRITE)
2792 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2793 if (mode & MAY_EXEC)
2794 args.access |= NFS4_ACCESS_LOOKUP;
2795 } else {
2796 if (mode & MAY_WRITE)
2797 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2798 if (mode & MAY_EXEC)
2799 args.access |= NFS4_ACCESS_EXECUTE;
2800 }
c407d41a
TM		 2801
2802 res.fattr = nfs_alloc_fattr();
2803 if (res.fattr == NULL)
2804 return -ENOMEM;
2805
7c513058 2806 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 2807 if (!status) {
6168f62c 2808 nfs_access_set_mask(entry, res.access);
c407d41a 2809 nfs_refresh_inode(inode, res.fattr);
1da177e4 2810 }
c407d41a 2811 nfs_free_fattr(res.fattr);
1da177e4
LT		 2812 return status;
2813}
2814
2815static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2816{
2817 struct nfs4_exception exception = { };
2818 int err;
2819 do {
2820 err = nfs4_handle_exception(NFS_SERVER(inode),
2821 _nfs4_proc_access(inode, entry),
2822 &exception);
2823 } while (exception.retry);
2824 return err;
2825}
2826
2827/*
2828 * TODO: For the time being, we don't try to get any attributes
2829 * along with any of the zero-copy operations READ, READDIR,
2830 * READLINK, WRITE.
2831 *
2832 * In the case of the first three, we want to put the GETATTR
2833 * after the read-type operation -- this is because it is hard
2834 * to predict the length of a GETATTR response in v4, and thus
2835 * align the READ data correctly. This means that the GETATTR
2836 * may end up partially falling into the page cache, and we should
2837 * shift it into the 'tail' of the xdr_buf before processing.
2838 * To do this efficiently, we need to know the total length
2839 * of data received, which doesn't seem to be available outside
2840 * of the RPC layer.
2841 *
2842 * In the case of WRITE, we also want to put the GETATTR after
2843 * the operation -- in this case because we want to make sure
140150db 2844 * we get the post-operation mtime and size.
1da177e4
LT		 2845 *
2846 * Both of these changes to the XDR layer would in fact be quite
2847 * minor, but I decided to leave them for a subsequent patch.
2848 */
2849static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2850 unsigned int pgbase, unsigned int pglen)
2851{
2852 struct nfs4_readlink args = {
2853 .fh = NFS_FH(inode),
2854 .pgbase = pgbase,
2855 .pglen = pglen,
2856 .pages = &page,
2857 };
f50c7000 2858 struct nfs4_readlink_res res;
1da177e4
LT		 2859 struct rpc_message msg = {
2860 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2861 .rpc_argp = &args,
f50c7000 2862 .rpc_resp = &res,
1da177e4
LT		 2863 };
2864
7c513058 2865 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2866}
2867
2868static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2869 unsigned int pgbase, unsigned int pglen)
2870{
2871 struct nfs4_exception exception = { };
2872 int err;
2873 do {
2874 err = nfs4_handle_exception(NFS_SERVER(inode),
2875 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2876 &exception);
2877 } while (exception.retry);
2878 return err;
2879}
2880
1da177e4 2881/*
8867fe58 2882 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 2883 */
1da177e4
LT		 2884static int
2885nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 2886 int flags)
1da177e4 2887{
8867fe58 2888 struct nfs_open_context *ctx;
1da177e4 2889 struct nfs4_state *state;
1da177e4
LT		 2890 int status = 0;
2891
8867fe58
MS		 2892 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
2893 if (IS_ERR(ctx))
2894 return PTR_ERR(ctx);
2895
a8a5da99 2896 sattr->ia_mode &= ~current_umask();
8626e4a4
TM		 2897 state = nfs4_do_open(dir, dentry, ctx->mode,
2898 flags, sattr, ctx->cred,
2899 &ctx->mdsthreshold);
d4d9cdcb 2900 d_drop(dentry);
1da177e4
LT		 2901 if (IS_ERR(state)) {
2902 status = PTR_ERR(state);
c0204fd2 2903 goto out;
1da177e4 2904 }
d4d9cdcb 2905 d_add(dentry, igrab(state->inode));
d75340cc 2906 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
8867fe58 2907 ctx->state = state;
1da177e4 2908out:
8867fe58 2909 put_nfs_open_context(ctx);
1da177e4
LT		 2910 return status;
2911}
2912
2913static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2914{
16e42959 2915 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2916 struct nfs_removeargs args = {
1da177e4 2917 .fh = NFS_FH(dir),
26fe5750 2918 .name = *name,
16e42959 2919 };
4fdc17b2 2920 struct nfs_removeres res = {
16e42959 2921 .server = server,
1da177e4 2922 };
1da177e4 2923 struct rpc_message msg = {
4fdc17b2
TM		 2924 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2925 .rpc_argp = &args,
2926 .rpc_resp = &res,
1da177e4 2927 };
778d2817 2928 int status;
1da177e4 2929
7c513058 2930 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 2931 if (status == 0)
16e42959 2932 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 2933 return status;
2934}
2935
2936static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2937{
2938 struct nfs4_exception exception = { };
2939 int err;
2940 do {
2941 err = nfs4_handle_exception(NFS_SERVER(dir),
2942 _nfs4_proc_remove(dir, name),
2943 &exception);
2944 } while (exception.retry);
2945 return err;
2946}
2947
e4eff1a6 2948static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 2949{
e4eff1a6
TM		 2950 struct nfs_server *server = NFS_SERVER(dir);
2951 struct nfs_removeargs *args = msg->rpc_argp;
2952 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 2953
e4eff1a6 2954 res->server = server;
1da177e4 2955 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
9d12b216 2956 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
1da177e4
LT		 2957}
2958
34e137cc
BS		 2959static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
2960{
d9afbd1b
TM		 2961 nfs4_setup_sequence(NFS_SERVER(data->dir),
2962 &data->args.seq_args,
2963 &data->res.seq_res,
2964 task);
1da177e4
LT		 2965}
2966
e4eff1a6 2967static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 2968{
e4eff1a6
TM		 2969 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2970
14516c3a
TM		 2971 if (!nfs4_sequence_done(task, &res->seq_res))
2972 return 0;
9e33bed5 2973 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 2974 return 0;
2975 update_changeattr(dir, &res->cinfo);
e4eff1a6 2976 return 1;
1da177e4
LT		 2977}
2978
d3d4152a
JL		 2979static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
2980{
2981 struct nfs_server *server = NFS_SERVER(dir);
2982 struct nfs_renameargs *arg = msg->rpc_argp;
2983 struct nfs_renameres *res = msg->rpc_resp;
2984
2985 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 2986 res->server = server;
9d12b216 2987 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 2988}
2989
c6bfa1a1
BS		 2990static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
2991{
d9afbd1b
TM		 2992 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
2993 &data->args.seq_args,
2994 &data->res.seq_res,
2995 task);
d3d4152a
JL		 2996}
2997
2998static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
2999 struct inode *new_dir)
3000{
3001 struct nfs_renameres *res = task->tk_msg.rpc_resp;
3002
3003 if (!nfs4_sequence_done(task, &res->seq_res))
3004 return 0;
3005 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3006 return 0;
3007
3008 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3009 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3010 return 1;
3011}
3012
1da177e4
LT		 3013static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3014 struct inode *new_dir, struct qstr *new_name)
3015{
6caf2c82 3016 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 3017 struct nfs_renameargs arg = {
1da177e4
LT		 3018 .old_dir = NFS_FH(old_dir),
3019 .new_dir = NFS_FH(new_dir),
3020 .old_name = old_name,
3021 .new_name = new_name,
6caf2c82 3022 };
e8582a8b 3023 struct nfs_renameres res = {
6caf2c82 3024 .server = server,
1da177e4 3025 };
1da177e4
LT		 3026 struct rpc_message msg = {
3027 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
3028 .rpc_argp = &arg,
3029 .rpc_resp = &res,
3030 };
011fff72 3031 int status = -ENOMEM;
1da177e4 3032
7c513058 3033 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1da177e4
LT		 3034 if (!status) {
3035 update_changeattr(old_dir, &res.old_cinfo);
3036 update_changeattr(new_dir, &res.new_cinfo);
3037 }
3038 return status;
3039}
3040
3041static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3042 struct inode *new_dir, struct qstr *new_name)
3043{
3044 struct nfs4_exception exception = { };
3045 int err;
3046 do {
3047 err = nfs4_handle_exception(NFS_SERVER(old_dir),
3048 _nfs4_proc_rename(old_dir, old_name,
3049 new_dir, new_name),
3050 &exception);
3051 } while (exception.retry);
3052 return err;
3053}
3054
3055static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3056{
91ba2eee 3057 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3058 struct nfs4_link_arg arg = {
3059 .fh = NFS_FH(inode),
3060 .dir_fh = NFS_FH(dir),
3061 .name = name,
91ba2eee
TM		 3062 .bitmask = server->attr_bitmask,
3063 };
91ba2eee
TM		 3064 struct nfs4_link_res res = {
3065 .server = server,
1da177e4 3066 };
1da177e4
LT		 3067 struct rpc_message msg = {
3068 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3069 .rpc_argp = &arg,
91ba2eee 3070 .rpc_resp = &res,
1da177e4 3071 };
136f2627
TM		 3072 int status = -ENOMEM;
3073
3074 res.fattr = nfs_alloc_fattr();
778d2817 3075 if (res.fattr == NULL)
136f2627 3076 goto out;
1da177e4 3077
7c513058 3078 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3079 if (!status) {
3080 update_changeattr(dir, &res.cinfo);
73a3d07c 3081 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 3082 }
136f2627 3083out:
136f2627 3084 nfs_free_fattr(res.fattr);
1da177e4
LT		 3085 return status;
3086}
3087
3088static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3089{
3090 struct nfs4_exception exception = { };
3091 int err;
3092 do {
3093 err = nfs4_handle_exception(NFS_SERVER(inode),
3094 _nfs4_proc_link(inode, dir, name),
3095 &exception);
3096 } while (exception.retry);
3097 return err;
3098}
3099
57dc9a57
TM		 3100struct nfs4_createdata {
3101 struct rpc_message msg;
3102 struct nfs4_create_arg arg;
3103 struct nfs4_create_res res;
3104 struct nfs_fh fh;
3105 struct nfs_fattr fattr;
57dc9a57
TM		 3106};
3107
3108static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3109 struct qstr *name, struct iattr *sattr, u32 ftype)
3110{
3111 struct nfs4_createdata *data;
3112
3113 data = kzalloc(sizeof(*data), GFP_KERNEL);
3114 if (data != NULL) {
3115 struct nfs_server *server = NFS_SERVER(dir);
3116
3117 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3118 data->msg.rpc_argp = &data->arg;
3119 data->msg.rpc_resp = &data->res;
3120 data->arg.dir_fh = NFS_FH(dir);
3121 data->arg.server = server;
3122 data->arg.name = name;
3123 data->arg.attrs = sattr;
3124 data->arg.ftype = ftype;
3125 data->arg.bitmask = server->attr_bitmask;
3126 data->res.server = server;
3127 data->res.fh = &data->fh;
3128 data->res.fattr = &data->fattr;
57dc9a57 3129 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3130 }
3131 return data;
3132}
3133
3134static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3135{
7c513058 3136 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3137 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3138 if (status == 0) {
3139 update_changeattr(dir, &data->res.dir_cinfo);
57dc9a57
TM		 3140 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
3141 }
3142 return status;
3143}
3144
3145static void nfs4_free_createdata(struct nfs4_createdata *data)
3146{
3147 kfree(data);
3148}
3149
4f390c15 3150static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3151 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 3152{
57dc9a57
TM		 3153 struct nfs4_createdata *data;
3154 int status = -ENAMETOOLONG;
1da177e4 3155
94a6d753 3156 if (len > NFS4_MAXPATHLEN)
57dc9a57 3157 goto out;
4f390c15 3158
57dc9a57
TM		 3159 status = -ENOMEM;
3160 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3161 if (data == NULL)
3162 goto out;
3163
3164 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3165 data->arg.u.symlink.pages = &page;
3166 data->arg.u.symlink.len = len;
1da177e4 3167
57dc9a57
TM		 3168 status = nfs4_do_create(dir, dentry, data);
3169
3170 nfs4_free_createdata(data);
3171out:
1da177e4
LT		 3172 return status;
3173}
3174
4f390c15 3175static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3176 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3177{
3178 struct nfs4_exception exception = { };
3179 int err;
3180 do {
3181 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 3182 _nfs4_proc_symlink(dir, dentry, page,
3183 len, sattr),
1da177e4
LT		 3184 &exception);
3185 } while (exception.retry);
3186 return err;
3187}
3188
3189static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3190 struct iattr *sattr)
3191{
57dc9a57
TM		 3192 struct nfs4_createdata *data;
3193 int status = -ENOMEM;
1da177e4 3194
57dc9a57
TM		 3195 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3196 if (data == NULL)
3197 goto out;
3198
3199 status = nfs4_do_create(dir, dentry, data);
3200
3201 nfs4_free_createdata(data);
3202out:
1da177e4
LT		 3203 return status;
3204}
3205
3206static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3207 struct iattr *sattr)
3208{
3209 struct nfs4_exception exception = { };
3210 int err;
a8a5da99
AK		 3211
3212 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3213 do {
3214 err = nfs4_handle_exception(NFS_SERVER(dir),
3215 _nfs4_proc_mkdir(dir, dentry, sattr),
3216 &exception);
3217 } while (exception.retry);
3218 return err;
3219}
3220
3221static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3222 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3223{
3224 struct inode *dir = dentry->d_inode;
3225 struct nfs4_readdir_arg args = {
3226 .fh = NFS_FH(dir),
56e4ebf8 3227 .pages = pages,
1da177e4
LT		 3228 .pgbase = 0,
3229 .count = count,
96d25e53 3230 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3231 .plus = plus,
1da177e4
LT		 3232 };
3233 struct nfs4_readdir_res res;
3234 struct rpc_message msg = {
3235 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3236 .rpc_argp = &args,
3237 .rpc_resp = &res,
3238 .rpc_cred = cred,
3239 };
3240 int status;
3241
3110ff80 3242 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 3243 dentry->d_parent->d_name.name,
3244 dentry->d_name.name,
3245 (unsigned long long)cookie);
c3f52af3 3246 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3247 res.pgbase = args.pgbase;
7c513058 3248 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3249 if (status >= 0) {
c3f52af3 3250 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3251 status += args.pgbase;
3252 }
c4812998
TM		 3253
3254 nfs_invalidate_atime(dir);
3255
3110ff80 3256 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3257 return status;
3258}
3259
3260static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3261 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3262{
3263 struct nfs4_exception exception = { };
3264 int err;
3265 do {
3266 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3267 _nfs4_proc_readdir(dentry, cred, cookie,
56e4ebf8 3268 pages, count, plus),
1da177e4
LT		 3269 &exception);
3270 } while (exception.retry);
3271 return err;
3272}
3273
3274static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3275 struct iattr *sattr, dev_t rdev)
3276{
57dc9a57
TM		 3277 struct nfs4_createdata *data;
3278 int mode = sattr->ia_mode;
3279 int status = -ENOMEM;
1da177e4 3280
57dc9a57
TM		 3281 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3282 if (data == NULL)
3283 goto out;
3284
1da177e4 3285 if (S_ISFIFO(mode))
57dc9a57 3286 data->arg.ftype = NF4FIFO;
1da177e4 3287 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3288 data->arg.ftype = NF4BLK;
3289 data->arg.u.device.specdata1 = MAJOR(rdev);
3290 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3291 }
3292 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3293 data->arg.ftype = NF4CHR;
3294 data->arg.u.device.specdata1 = MAJOR(rdev);
3295 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3296 } else if (!S_ISSOCK(mode)) {
3297 status = -EINVAL;
3298 goto out_free;
1da177e4 3299 }
1da177e4 3300
57dc9a57 3301 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3302out_free:
57dc9a57
TM		 3303 nfs4_free_createdata(data);
3304out:
1da177e4
LT		 3305 return status;
3306}
3307
3308static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3309 struct iattr *sattr, dev_t rdev)
3310{
3311 struct nfs4_exception exception = { };
3312 int err;
a8a5da99
AK		 3313
3314 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3315 do {
3316 err = nfs4_handle_exception(NFS_SERVER(dir),
3317 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3318 &exception);
3319 } while (exception.retry);
3320 return err;
3321}
3322
3323static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3324 struct nfs_fsstat *fsstat)
3325{
3326 struct nfs4_statfs_arg args = {
3327 .fh = fhandle,
3328 .bitmask = server->attr_bitmask,
3329 };
24ad148a
BH		 3330 struct nfs4_statfs_res res = {
3331 .fsstat = fsstat,
3332 };
1da177e4
LT		 3333 struct rpc_message msg = {
3334 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3335 .rpc_argp = &args,
24ad148a 3336 .rpc_resp = &res,
1da177e4
LT		 3337 };
3338
0e574af1 3339 nfs_fattr_init(fsstat->fattr);
7c513058 3340 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3341}
3342
3343static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3344{
3345 struct nfs4_exception exception = { };
3346 int err;
3347 do {
3348 err = nfs4_handle_exception(server,
3349 _nfs4_proc_statfs(server, fhandle, fsstat),
3350 &exception);
3351 } while (exception.retry);
3352 return err;
3353}
3354
3355static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3356 struct nfs_fsinfo *fsinfo)
3357{
3358 struct nfs4_fsinfo_arg args = {
3359 .fh = fhandle,
3360 .bitmask = server->attr_bitmask,
3361 };
3dda5e43
BH		 3362 struct nfs4_fsinfo_res res = {
3363 .fsinfo = fsinfo,
3364 };
1da177e4
LT		 3365 struct rpc_message msg = {
3366 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3367 .rpc_argp = &args,
3dda5e43 3368 .rpc_resp = &res,
1da177e4
LT		 3369 };
3370
7c513058 3371 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3372}
3373
3374static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3375{
3376 struct nfs4_exception exception = { };
3377 int err;
3378
3379 do {
3380 err = nfs4_handle_exception(server,
3381 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3382 &exception);
3383 } while (exception.retry);
3384 return err;
3385}
3386
3387static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3388{
e38eb650
BS		 3389 int error;
3390
0e574af1 3391 nfs_fattr_init(fsinfo->fattr);
e38eb650 3392 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 3393 if (error == 0) {
3394 /* block layout checks this! */
3395 server->pnfs_blksize = fsinfo->blksize;
e38eb650 3396 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 3397 }
e38eb650
BS		 3398
3399 return error;
1da177e4
LT		 3400}
3401
3402static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3403 struct nfs_pathconf *pathconf)
3404{
3405 struct nfs4_pathconf_arg args = {
3406 .fh = fhandle,
3407 .bitmask = server->attr_bitmask,
3408 };
d45b2989
BH		 3409 struct nfs4_pathconf_res res = {
3410 .pathconf = pathconf,
3411 };
1da177e4
LT		 3412 struct rpc_message msg = {
3413 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3414 .rpc_argp = &args,
d45b2989 3415 .rpc_resp = &res,
1da177e4
LT		 3416 };
3417
3418 /* None of the pathconf attributes are mandatory to implement */
3419 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3420 memset(pathconf, 0, sizeof(*pathconf));
3421 return 0;
3422 }
3423
0e574af1 3424 nfs_fattr_init(pathconf->fattr);
7c513058 3425 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3426}
3427
3428static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3429 struct nfs_pathconf *pathconf)
3430{
3431 struct nfs4_exception exception = { };
3432 int err;
3433
3434 do {
3435 err = nfs4_handle_exception(server,
3436 _nfs4_proc_pathconf(server, fhandle, pathconf),
3437 &exception);
3438 } while (exception.retry);
3439 return err;
3440}
3441
d20581aa
BH		 3442void __nfs4_read_done_cb(struct nfs_read_data *data)
3443{
cd841605 3444 nfs_invalidate_atime(data->header->inode);
d20581aa
BH		 3445}
3446
cbdabc7f 3447static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3448{
cd841605 3449 struct nfs_server *server = NFS_SERVER(data->header->inode);
1da177e4 3450
9e33bed5 3451 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
d00c5d43 3452 rpc_restart_call_prepare(task);
ec06c096 3453 return -EAGAIN;
1da177e4 3454 }
8850df99 3455
d20581aa 3456 __nfs4_read_done_cb(data);
1da177e4 3457 if (task->tk_status > 0)
ec06c096
TM		 3458 renew_lease(server, data->timestamp);
3459 return 0;
1da177e4
LT		 3460}
3461
cbdabc7f
AA		 3462static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3463{
3464
3465 dprintk("--> %s\n", __func__);
3466
3467 if (!nfs4_sequence_done(task, &data->res.seq_res))
3468 return -EAGAIN;
3469
d20581aa
BH		 3470 return data->read_done_cb ? data->read_done_cb(task, data) :
3471 nfs4_read_done_cb(task, data);
cbdabc7f
AA		 3472}
3473
bdc7f021 3474static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3475{
1da177e4 3476 data->timestamp = jiffies;
cbdabc7f 3477 data->read_done_cb = nfs4_read_done_cb;
bdc7f021 3478 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
9d12b216 3479 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
1da177e4
LT		 3480}
3481
ea7c3303
BS		 3482static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3483{
d9afbd1b
TM		 3484 nfs4_setup_sequence(NFS_SERVER(data->header->inode),
3485 &data->args.seq_args,
3486 &data->res.seq_res,
3487 task);
1da177e4
LT		 3488}
3489
b029bc9b 3490static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3491{
cd841605 3492 struct inode *inode = data->header->inode;
1da177e4 3493
9e33bed5 3494 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
d00c5d43 3495 rpc_restart_call_prepare(task);
788e7a89 3496 return -EAGAIN;
1da177e4 3497 }
4f9838c7 3498 if (task->tk_status >= 0) {
1da177e4 3499 renew_lease(NFS_SERVER(inode), data->timestamp);
5a37f851 3500 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4f9838c7 3501 }
788e7a89 3502 return 0;
1da177e4
LT		 3503}
3504
b029bc9b
FI		 3505static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3506{
3507 if (!nfs4_sequence_done(task, &data->res.seq_res))
3508 return -EAGAIN;
d20581aa
BH		 3509 return data->write_done_cb ? data->write_done_cb(task, data) :
3510 nfs4_write_done_cb(task, data);
b029bc9b
FI		 3511}
3512
5a37f851
TM		 3513static
3514bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
a69aef14 3515{
5a37f851
TM		 3516 const struct nfs_pgio_header *hdr = data->header;
3517
3518 /* Don't request attributes for pNFS or O_DIRECT writes */
3519 if (data->ds_clp != NULL || hdr->dreq != NULL)
3520 return false;
3521 /* Otherwise, request attributes if and only if we don't hold
3522 * a delegation
3523 */
011e2a7f 3524 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 3525}
a69aef14 3526
bdc7f021 3527static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3528{
cd841605 3529 struct nfs_server *server = NFS_SERVER(data->header->inode);
bdc7f021 3530
5a37f851 3531 if (!nfs4_write_need_cache_consistency_data(data)) {
7ffd1064
FI		 3532 data->args.bitmask = NULL;
3533 data->res.fattr = NULL;
3534 } else
3535 data->args.bitmask = server->cache_consistency_bitmask;
5a37f851 3536
b029bc9b
FI		 3537 if (!data->write_done_cb)
3538 data->write_done_cb = nfs4_write_done_cb;
4f9838c7 3539 data->res.server = server;
1da177e4
LT		 3540 data->timestamp = jiffies;
3541
bdc7f021 3542 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
9d12b216 3543 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3544}
3545
c6cb80d0
BS		 3546static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
3547{
d9afbd1b
TM		 3548 nfs4_setup_sequence(NFS_SERVER(data->header->inode),
3549 &data->args.seq_args,
3550 &data->res.seq_res,
3551 task);
1da177e4
LT		 3552}
3553
0b7c0153 3554static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 3555{
d9afbd1b
TM		 3556 nfs4_setup_sequence(NFS_SERVER(data->inode),
3557 &data->args.seq_args,
3558 &data->res.seq_res,
3559 task);
1da177e4
LT		 3560}
3561
0b7c0153 3562static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 3563{
1da177e4 3564 struct inode *inode = data->inode;
14516c3a 3565
9e33bed5 3566 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
d00c5d43 3567 rpc_restart_call_prepare(task);
788e7a89 3568 return -EAGAIN;
1da177e4 3569 }
788e7a89 3570 return 0;
1da177e4
LT		 3571}
3572
0b7c0153 3573static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 3574{
3575 if (!nfs4_sequence_done(task, &data->res.seq_res))
3576 return -EAGAIN;
0b7c0153 3577 return data->commit_done_cb(task, data);
5f452431
FI		 3578}
3579
0b7c0153 3580static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 3581{
788e7a89 3582 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 3583
0b7c0153
FI		 3584 if (data->commit_done_cb == NULL)
3585 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 3586 data->res.server = server;
bdc7f021 3587 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
9d12b216 3588 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3589}
3590
9bc4e3ca
CL		 3591struct nfs4_renewdata {
3592 struct nfs_client *client;
3593 unsigned long timestamp;
3594};
3595
1da177e4
LT		 3596/*
3597 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3598 * standalone procedure for queueing an asynchronous RENEW.
3599 */
9bc4e3ca 3600static void nfs4_renew_release(void *calldata)
dc96aef9 3601{
9bc4e3ca
CL		 3602 struct nfs4_renewdata *data = calldata;
3603 struct nfs_client *clp = data->client;
dc96aef9 3604
0851de06
AB		 3605 if (atomic_read(&clp->cl_count) > 1)
3606 nfs4_schedule_state_renewal(clp);
3607 nfs_put_client(clp);
9bc4e3ca 3608 kfree(data);
dc96aef9
AB		 3609}
3610
9bc4e3ca 3611static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 3612{
9bc4e3ca
CL		 3613 struct nfs4_renewdata *data = calldata;
3614 struct nfs_client *clp = data->client;
3615 unsigned long timestamp = data->timestamp;
1da177e4
LT		 3616
3617 if (task->tk_status < 0) {
95baa25c 3618 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 3619 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3620 return;
3621 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 3622 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 3623 return;
3624 }
3625 nfs4_schedule_path_down_recovery(clp);
1da177e4 3626 }
452e9352 3627 do_renew_lease(clp, timestamp);
1da177e4
LT		 3628}
3629
963d8fe5
TM		 3630static const struct rpc_call_ops nfs4_renew_ops = {
3631 .rpc_call_done = nfs4_renew_done,
dc96aef9 3632 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 3633};
3634
2f60ea6b 3635static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 3636{
3637 struct rpc_message msg = {
3638 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3639 .rpc_argp = clp,
b4454fe1 3640 .rpc_cred = cred,
1da177e4 3641 };
9bc4e3ca 3642 struct nfs4_renewdata *data;
1da177e4 3643
2f60ea6b
TM		 3644 if (renew_flags == 0)
3645 return 0;
0851de06
AB		 3646 if (!atomic_inc_not_zero(&clp->cl_count))
3647 return -EIO;
b569ad34 3648 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 3649 if (data == NULL)
3650 return -ENOMEM;
3651 data->client = clp;
3652 data->timestamp = jiffies;
1da177e4 3653 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
9bc4e3ca 3654 &nfs4_renew_ops, data);
1da177e4
LT		 3655}
3656
8534d4ec 3657static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3658{
3659 struct rpc_message msg = {
3660 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3661 .rpc_argp = clp,
b4454fe1 3662 .rpc_cred = cred,
1da177e4
LT		 3663 };
3664 unsigned long now = jiffies;
3665 int status;
3666
3667 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3668 if (status < 0)
3669 return status;
452e9352 3670 do_renew_lease(clp, now);
1da177e4
LT		 3671 return 0;
3672}
3673
aa1870af
BF		 3674static inline int nfs4_server_supports_acls(struct nfs_server *server)
3675{
3676 return (server->caps & NFS_CAP_ACLS)
3677 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3678 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3679}
3680
21f498c2
TM		 3681/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
3682 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 3683 * the stack.
3684 */
21f498c2 3685#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 3686
e9e3d724
NH		 3687static int buf_to_pages_noslab(const void *buf, size_t buflen,
3688 struct page **pages, unsigned int *pgbase)
3689{
3690 struct page *newpage, **spages;
3691 int rc = 0;
3692 size_t len;
3693 spages = pages;
3694
3695 do {
21f498c2 3696 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 3697 newpage = alloc_page(GFP_KERNEL);
3698
3699 if (newpage == NULL)
3700 goto unwind;
3701 memcpy(page_address(newpage), buf, len);
3702 buf += len;
3703 buflen -= len;
3704 *pages++ = newpage;
3705 rc++;
3706 } while (buflen != 0);
3707
3708 return rc;
3709
3710unwind:
3711 for(; rc > 0; rc--)
3712 __free_page(spages[rc-1]);
3713 return -ENOMEM;
3714}
3715
e50a1c2e
BF		 3716struct nfs4_cached_acl {
3717 int cached;
3718 size_t len;
3e9d4154 3719 char data[0];
e50a1c2e
BF		 3720};
3721
3722static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3723{
3724 struct nfs_inode *nfsi = NFS_I(inode);
3725
3726 spin_lock(&inode->i_lock);
3727 kfree(nfsi->nfs4_acl);
3728 nfsi->nfs4_acl = acl;
3729 spin_unlock(&inode->i_lock);
3730}
3731
3732static void nfs4_zap_acl_attr(struct inode *inode)
3733{
3734 nfs4_set_cached_acl(inode, NULL);
3735}
3736
3737static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3738{
3739 struct nfs_inode *nfsi = NFS_I(inode);
3740 struct nfs4_cached_acl *acl;
3741 int ret = -ENOENT;
3742
3743 spin_lock(&inode->i_lock);
3744 acl = nfsi->nfs4_acl;
3745 if (acl == NULL)
3746 goto out;
3747 if (buf == NULL) /* user is just asking for length */
3748 goto out_len;
3749 if (acl->cached == 0)
3750 goto out;
3751 ret = -ERANGE; /* see getxattr(2) man page */
3752 if (acl->len > buflen)
3753 goto out;
3754 memcpy(buf, acl->data, acl->len);
3755out_len:
3756 ret = acl->len;
3757out:
3758 spin_unlock(&inode->i_lock);
3759 return ret;
3760}
3761
5794d21e 3762static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 3763{
3764 struct nfs4_cached_acl *acl;
b291f1b1 3765 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 3766
1f1ea6c2 3767 if (buflen <= PAGE_SIZE) {
b291f1b1 3768 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 3769 if (acl == NULL)
3770 goto out;
3771 acl->cached = 1;
5794d21e 3772 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 3773 } else {
3774 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3775 if (acl == NULL)
3776 goto out;
3777 acl->cached = 0;
3778 }
3779 acl->len = acl_len;
3780out:
3781 nfs4_set_cached_acl(inode, acl);
3782}
3783
bf118a34
AA		 3784/*
3785 * The getxattr API returns the required buffer length when called with a
3786 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
3787 * the required buf. On a NULL buf, we send a page of data to the server
3788 * guessing that the ACL request can be serviced by a page. If so, we cache
3789 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
3790 * the cache. If not so, we throw away the page, and cache the required
3791 * length. The next getxattr call will then produce another round trip to
3792 * the server, this time with the input buf of the required size.
3793 */
16b4289c 3794static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3795{
bf118a34 3796 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 3797 struct nfs_getaclargs args = {
3798 .fh = NFS_FH(inode),
3799 .acl_pages = pages,
3800 .acl_len = buflen,
3801 };
663c79b3
BH		 3802 struct nfs_getaclres res = {
3803 .acl_len = buflen,
3804 };
aa1870af
BF		 3805 struct rpc_message msg = {
3806 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3807 .rpc_argp = &args,
663c79b3 3808 .rpc_resp = &res,
aa1870af 3809 };
21f498c2
TM		 3810 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
3811 int ret = -ENOMEM, i;
aa1870af 3812
bf118a34
AA		 3813 /* As long as we're doing a round trip to the server anyway,
3814 * let's be prepared for a page of acl data. */
3815 if (npages == 0)
3816 npages = 1;
21f498c2
TM		 3817 if (npages > ARRAY_SIZE(pages))
3818 return -ERANGE;
5a006899 3819
bf118a34
AA		 3820 for (i = 0; i < npages; i++) {
3821 pages[i] = alloc_page(GFP_KERNEL);
3822 if (!pages[i])
3823 goto out_free;
e50a1c2e 3824 }
5a006899
SP		 3825
3826 /* for decoding across pages */
3827 res.acl_scratch = alloc_page(GFP_KERNEL);
3828 if (!res.acl_scratch)
3829 goto out_free;
3830
bf118a34
AA		 3831 args.acl_len = npages * PAGE_SIZE;
3832 args.acl_pgbase = 0;
5a006899 3833
de040bec 3834 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 3835 __func__, buf, buflen, npages, args.acl_len);
3836 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
3837 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 3838 if (ret)
3839 goto out_free;
bf118a34 3840
1f1ea6c2
TM		 3841 /* Handle the case where the passed-in buffer is too short */
3842 if (res.acl_flags & NFS4_ACL_TRUNC) {
3843 /* Did the user only issue a request for the acl length? */
3844 if (buf == NULL)
3845 goto out_ok;
e50a1c2e 3846 ret = -ERANGE;
1f1ea6c2 3847 goto out_free;
e50a1c2e 3848 }
1f1ea6c2 3849 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 3850 if (buf) {
3851 if (res.acl_len > buflen) {
3852 ret = -ERANGE;
3853 goto out_free;
3854 }
1f1ea6c2 3855 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 3856 }
1f1ea6c2
TM		 3857out_ok:
3858 ret = res.acl_len;
e50a1c2e 3859out_free:
bf118a34
AA		 3860 for (i = 0; i < npages; i++)
3861 if (pages[i])
3862 __free_page(pages[i]);
331818f1
TM		 3863 if (res.acl_scratch)
3864 __free_page(res.acl_scratch);
aa1870af
BF		 3865 return ret;
3866}
3867
16b4289c
TM		 3868static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3869{
3870 struct nfs4_exception exception = { };
3871 ssize_t ret;
3872 do {
3873 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3874 if (ret >= 0)
3875 break;
3876 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3877 } while (exception.retry);
3878 return ret;
3879}
3880
e50a1c2e
BF		 3881static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3882{
3883 struct nfs_server *server = NFS_SERVER(inode);
3884 int ret;
3885
3886 if (!nfs4_server_supports_acls(server))
3887 return -EOPNOTSUPP;
3888 ret = nfs_revalidate_inode(server, inode);
3889 if (ret < 0)
3890 return ret;
08a22b39
AK		 3891 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3892 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 3893 ret = nfs4_read_cached_acl(inode, buf, buflen);
3894 if (ret != -ENOENT)
bf118a34
AA		 3895 /* -ENOENT is returned if there is no ACL or if there is an ACL
3896 * but no cached acl data, just the acl length */
e50a1c2e
BF		 3897 return ret;
3898 return nfs4_get_acl_uncached(inode, buf, buflen);
3899}
3900
16b4289c 3901static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 3902{
3903 struct nfs_server *server = NFS_SERVER(inode);
3904 struct page *pages[NFS4ACL_MAXPAGES];
3905 struct nfs_setaclargs arg = {
3906 .fh = NFS_FH(inode),
3907 .acl_pages = pages,
3908 .acl_len = buflen,
3909 };
73c403a9 3910 struct nfs_setaclres res;
4b580ee3
BF		 3911 struct rpc_message msg = {
3912 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3913 .rpc_argp = &arg,
73c403a9 3914 .rpc_resp = &res,
4b580ee3 3915 };
21f498c2 3916 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 3917 int ret, i;
4b580ee3
BF		 3918
3919 if (!nfs4_server_supports_acls(server))
3920 return -EOPNOTSUPP;
21f498c2
TM		 3921 if (npages > ARRAY_SIZE(pages))
3922 return -ERANGE;
e9e3d724
NH		 3923 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3924 if (i < 0)
3925 return i;
57ec14c5 3926 nfs4_inode_return_delegation(inode);
7c513058 3927 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 3928
3929 /*
3930 * Free each page after tx, so the only ref left is
3931 * held by the network stack
3932 */
3933 for (; i > 0; i--)
3934 put_page(pages[i-1]);
3935
08a22b39
AK		 3936 /*
3937 * Acl update can result in inode attribute update.
3938 * so mark the attribute cache invalid.
3939 */
3940 spin_lock(&inode->i_lock);
3941 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
3942 spin_unlock(&inode->i_lock);
f41f7418
TM		 3943 nfs_access_zap_cache(inode);
3944 nfs_zap_acl_cache(inode);
4b580ee3
BF		 3945 return ret;
3946}
3947
16b4289c
TM		 3948static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3949{
3950 struct nfs4_exception exception = { };
3951 int err;
3952 do {
3953 err = nfs4_handle_exception(NFS_SERVER(inode),
3954 __nfs4_proc_set_acl(inode, buf, buflen),
3955 &exception);
3956 } while (exception.retry);
3957 return err;
3958}
3959
1da177e4 3960static int
aa5190d0 3961nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 3962{
aa5190d0
TM		 3963 struct nfs_client *clp = server->nfs_client;
3964
3965 if (task->tk_status >= 0)
1da177e4
LT		 3966 return 0;
3967 switch(task->tk_status) {
a1d0b5ee 3968 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 3969 case -NFS4ERR_ADMIN_REVOKED:
3970 case -NFS4ERR_BAD_STATEID:
14977489
TM		 3971 if (state == NULL)
3972 break;
3973 nfs_remove_bad_delegation(state->inode);
9e33bed5
TM		 3974 case -NFS4ERR_OPENMODE:
3975 if (state == NULL)
3976 break;
0400a6b0
TM		 3977 nfs4_schedule_stateid_recovery(server, state);
3978 goto wait_on_recovery;
0ced63d1
TM		 3979 case -NFS4ERR_EXPIRED:
3980 if (state != NULL)
3981 nfs4_schedule_stateid_recovery(server, state);
1da177e4 3982 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 3983 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 3984 nfs4_schedule_lease_recovery(clp);
3985 goto wait_on_recovery;
4745e315
AA		 3986#if defined(CONFIG_NFS_V4_1)
3987 case -NFS4ERR_BADSESSION:
3988 case -NFS4ERR_BADSLOT:
3989 case -NFS4ERR_BAD_HIGH_SLOT:
3990 case -NFS4ERR_DEADSESSION:
3991 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3992 case -NFS4ERR_SEQ_FALSE_RETRY:
3993 case -NFS4ERR_SEQ_MISORDERED:
3994 dprintk("%s ERROR %d, Reset session\n", __func__,
3995 task->tk_status);
9f594791 3996 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4745e315
AA		 3997 task->tk_status = 0;
3998 return -EAGAIN;
3999#endif /* CONFIG_NFS_V4_1 */
1da177e4 4000 case -NFS4ERR_DELAY:
aa5190d0 4001 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 4002 case -NFS4ERR_GRACE:
1da177e4
LT		 4003 rpc_delay(task, NFS4_POLL_RETRY_MAX);
4004 task->tk_status = 0;
4005 return -EAGAIN;
a8a4ae3a 4006 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4
LT		 4007 case -NFS4ERR_OLD_STATEID:
4008 task->tk_status = 0;
4009 return -EAGAIN;
4010 }
4011 task->tk_status = nfs4_map_errors(task->tk_status);
4012 return 0;
0400a6b0 4013wait_on_recovery:
a2c0b9e2 4014 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4015 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4016 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
4017 task->tk_status = 0;
4018 return -EAGAIN;
1da177e4
LT		 4019}
4020
f092075d
CL		 4021static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4022 nfs4_verifier *bootverf)
cd93710e
CL		 4023{
4024 __be32 verf[2];
4025
2c820d9a
CL		 4026 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4027 /* An impossible timestamp guarantees this value
4028 * will never match a generated boot time. */
4029 verf[0] = 0;
4030 verf[1] = (__be32)(NSEC_PER_SEC + 1);
4031 } else {
f092075d
CL		 4032 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
4033 verf[0] = (__be32)nn->boot_time.tv_sec;
4034 verf[1] = (__be32)nn->boot_time.tv_nsec;
2c820d9a 4035 }
cd93710e
CL		 4036 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4037}
4038
e984a55a
CL		 4039static unsigned int
4040nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4041 char *buf, size_t len)
4042{
4043 unsigned int result;
4044
4045 rcu_read_lock();
4046 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4047 clp->cl_ipaddr,
4048 rpc_peeraddr2str(clp->cl_rpcclient,
4049 RPC_DISPLAY_ADDR),
4050 rpc_peeraddr2str(clp->cl_rpcclient,
4051 RPC_DISPLAY_PROTO));
4052 rcu_read_unlock();
4053 return result;
4054}
4055
4056static unsigned int
4057nfs4_init_uniform_client_string(const struct nfs_client *clp,
4058 char *buf, size_t len)
4059{
6f2ea7f2
CL		 4060 char *nodename = clp->cl_rpcclient->cl_nodename;
4061
4062 if (nfs4_client_id_uniquifier[0] != '\0')
4063 nodename = nfs4_client_id_uniquifier;
e984a55a
CL		 4064 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4065 clp->rpc_ops->version, clp->cl_minorversion,
6f2ea7f2 4066 nodename);
e984a55a
CL		 4067}
4068
6bbb4ae8
CL		 4069/**
4070 * nfs4_proc_setclientid - Negotiate client ID
4071 * @clp: state data structure
4072 * @program: RPC program for NFSv4 callback service
4073 * @port: IP port number for NFS4 callback service
4074 * @cred: RPC credential to use for this call
4075 * @res: where to place the result
4076 *
4077 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4078 */
bb8b27e5
TM		 4079int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4080 unsigned short port, struct rpc_cred *cred,
4081 struct nfs4_setclientid_res *res)
1da177e4
LT		 4082{
4083 nfs4_verifier sc_verifier;
4084 struct nfs4_setclientid setclientid = {
4085 .sc_verifier = &sc_verifier,
4086 .sc_prog = program,
f4eecd5d 4087 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 4088 };
4089 struct rpc_message msg = {
4090 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4091 .rpc_argp = &setclientid,
bb8b27e5 4092 .rpc_resp = res,
286d7d6a 4093 .rpc_cred = cred,
1da177e4 4094 };
6bbb4ae8 4095 int status;
1da177e4 4096
de734831 4097 /* nfs_client_id4 */
f092075d 4098 nfs4_init_boot_verifier(clp, &sc_verifier);
e984a55a
CL		 4099 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4100 setclientid.sc_name_len =
4101 nfs4_init_uniform_client_string(clp,
4102 setclientid.sc_name,
4103 sizeof(setclientid.sc_name));
4104 else
4105 setclientid.sc_name_len =
4106 nfs4_init_nonuniform_client_string(clp,
4107 setclientid.sc_name,
4108 sizeof(setclientid.sc_name));
de734831 4109 /* cb_client4 */
e984a55a 4110 rcu_read_lock();
de734831 4111 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 4112 sizeof(setclientid.sc_netid),
4113 rpc_peeraddr2str(clp->cl_rpcclient,
4114 RPC_DISPLAY_NETID));
de734831
CL		 4115 rcu_read_unlock();
4116 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 4117 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 4118 clp->cl_ipaddr, port >> 8, port & 255);
4119
6bbb4ae8
CL		 4120 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4121 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4122 setclientid.sc_name_len, setclientid.sc_name);
4123 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4124 dprintk("NFS reply setclientid: %d\n", status);
4125 return status;
1da177e4
LT		 4126}
4127
6bbb4ae8
CL		 4128/**
4129 * nfs4_proc_setclientid_confirm - Confirm client ID
4130 * @clp: state data structure
4131 * @res: result of a previous SETCLIENTID
4132 * @cred: RPC credential to use for this call
4133 *
4134 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4135 */
fd954ae1 4136int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 4137 struct nfs4_setclientid_res *arg,
4138 struct rpc_cred *cred)
1da177e4
LT		 4139{
4140 struct nfs_fsinfo fsinfo;
4141 struct rpc_message msg = {
4142 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 4143 .rpc_argp = arg,
1da177e4 4144 .rpc_resp = &fsinfo,
286d7d6a 4145 .rpc_cred = cred,
1da177e4
LT		 4146 };
4147 unsigned long now;
4148 int status;
4149
6bbb4ae8
CL		 4150 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4151 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4152 clp->cl_clientid);
1da177e4 4153 now = jiffies;
1bd714f2 4154 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4155 if (status == 0) {
4156 spin_lock(&clp->cl_lock);
4157 clp->cl_lease_time = fsinfo.lease_time * HZ;
4158 clp->cl_last_renewal = now;
4159 spin_unlock(&clp->cl_lock);
4160 }
6bbb4ae8 4161 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 4162 return status;
4163}
4164
fe650407
TM		 4165struct nfs4_delegreturndata {
4166 struct nfs4_delegreturnargs args;
fa178f29 4167 struct nfs4_delegreturnres res;
fe650407
TM		 4168 struct nfs_fh fh;
4169 nfs4_stateid stateid;
26e976a8 4170 unsigned long timestamp;
fa178f29 4171 struct nfs_fattr fattr;
fe650407
TM		 4172 int rpc_status;
4173};
4174
fe650407
TM		 4175static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4176{
4177 struct nfs4_delegreturndata *data = calldata;
938e1010 4178
14516c3a
TM		 4179 if (!nfs4_sequence_done(task, &data->res.seq_res))
4180 return;
938e1010 4181
79708861
RL		 4182 switch (task->tk_status) {
4183 case -NFS4ERR_STALE_STATEID:
4184 case -NFS4ERR_EXPIRED:
4185 case 0:
fa178f29 4186 renew_lease(data->res.server, data->timestamp);
79708861
RL		 4187 break;
4188 default:
4189 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4190 -EAGAIN) {
d00c5d43 4191 rpc_restart_call_prepare(task);
79708861
RL		 4192 return;
4193 }
4194 }
4195 data->rpc_status = task->tk_status;
fe650407
TM		 4196}
4197
4198static void nfs4_delegreturn_release(void *calldata)
4199{
fe650407
TM		 4200 kfree(calldata);
4201}
4202
938e1010
AA		 4203#if defined(CONFIG_NFS_V4_1)
4204static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4205{
4206 struct nfs4_delegreturndata *d_data;
4207
4208 d_data = (struct nfs4_delegreturndata *)data;
4209
d9afbd1b
TM		 4210 nfs4_setup_sequence(d_data->res.server,
4211 &d_data->args.seq_args,
4212 &d_data->res.seq_res,
4213 task);
938e1010
AA		 4214}
4215#endif /* CONFIG_NFS_V4_1 */
4216
c8d149f3 4217static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 4218#if defined(CONFIG_NFS_V4_1)
4219 .rpc_call_prepare = nfs4_delegreturn_prepare,
4220#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 4221 .rpc_call_done = nfs4_delegreturn_done,
4222 .rpc_release = nfs4_delegreturn_release,
4223};
4224
e6f81075 4225static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 4226{
4227 struct nfs4_delegreturndata *data;
fa178f29 4228 struct nfs_server *server = NFS_SERVER(inode);
fe650407 4229 struct rpc_task *task;
5138fde0
TM		 4230 struct rpc_message msg = {
4231 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4232 .rpc_cred = cred,
4233 };
c970aa85
TM		 4234 struct rpc_task_setup task_setup_data = {
4235 .rpc_client = server->client,
5138fde0 4236 .rpc_message = &msg,
c970aa85
TM		 4237 .callback_ops = &nfs4_delegreturn_ops,
4238 .flags = RPC_TASK_ASYNC,
4239 };
e6f81075 4240 int status = 0;
fe650407 4241
8535b2be 4242 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 4243 if (data == NULL)
4244 return -ENOMEM;
9d12b216 4245 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 4246 data->args.fhandle = &data->fh;
4247 data->args.stateid = &data->stateid;
9e907fec 4248 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 4249 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 4250 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 4251 data->res.fattr = &data->fattr;
4252 data->res.server = server;
5138fde0 4253 nfs_fattr_init(data->res.fattr);
26e976a8 4254 data->timestamp = jiffies;
fe650407
TM		 4255 data->rpc_status = 0;
4256
c970aa85 4257 task_setup_data.callback_data = data;
1174dd1f
TM		 4258 msg.rpc_argp = &data->args;
4259 msg.rpc_resp = &data->res;
c970aa85 4260 task = rpc_run_task(&task_setup_data);
7a1218a2 4261 if (IS_ERR(task))
fe650407 4262 return PTR_ERR(task);
e6f81075
TM		 4263 if (!issync)
4264 goto out;
fe650407 4265 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 4266 if (status != 0)
4267 goto out;
4268 status = data->rpc_status;
e144cbcc
TM		 4269 if (status == 0)
4270 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4271 else
4272 nfs_refresh_inode(inode, &data->fattr);
e6f81075 4273out:
e6b3c4db 4274 rpc_put_task(task);
fe650407 4275 return status;
1da177e4
LT		 4276}
4277
e6f81075 4278int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 4279{
4280 struct nfs_server *server = NFS_SERVER(inode);
4281 struct nfs4_exception exception = { };
4282 int err;
4283 do {
e6f81075 4284 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 4285 switch (err) {
4286 case -NFS4ERR_STALE_STATEID:
4287 case -NFS4ERR_EXPIRED:
1da177e4
LT		 4288 case 0:
4289 return 0;
4290 }
4291 err = nfs4_handle_exception(server, err, &exception);
4292 } while (exception.retry);
4293 return err;
4294}
4295
4296#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4297#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4298
4299/*
4300 * sleep, with exponential backoff, and retry the LOCK operation.
4301 */
4302static unsigned long
4303nfs4_set_lock_task_retry(unsigned long timeout)
4304{
d310310c 4305 freezable_schedule_timeout_killable(timeout);
1da177e4
LT		 4306 timeout <<= 1;
4307 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4308 return NFS4_LOCK_MAXTIMEOUT;
4309 return timeout;
4310}
4311
1da177e4
LT		 4312static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4313{
4314 struct inode *inode = state->inode;
4315 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 4316 struct nfs_client *clp = server->nfs_client;
911d1aaf 4317 struct nfs_lockt_args arg = {
1da177e4 4318 .fh = NFS_FH(inode),
911d1aaf 4319 .fl = request,
1da177e4 4320 };
911d1aaf
TM		 4321 struct nfs_lockt_res res = {
4322 .denied = request,
1da177e4
LT		 4323 };
4324 struct rpc_message msg = {
4325 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4326 .rpc_argp = &arg,
4327 .rpc_resp = &res,
4328 .rpc_cred = state->owner->so_cred,
4329 };
1da177e4
LT		 4330 struct nfs4_lock_state *lsp;
4331 int status;
4332
911d1aaf 4333 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 4334 status = nfs4_set_lock_state(state, request);
4335 if (status != 0)
4336 goto out;
4337 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 4338 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4339 arg.lock_owner.s_dev = server->s_dev;
7c513058 4340 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 4341 switch (status) {
4342 case 0:
4343 request->fl_type = F_UNLCK;
4344 break;
4345 case -NFS4ERR_DENIED:
4346 status = 0;
1da177e4 4347 }
70cc6487 4348 request->fl_ops->fl_release_private(request);
8d0a8a9d 4349out:
1da177e4
LT		 4350 return status;
4351}
4352
4353static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4354{
4355 struct nfs4_exception exception = { };
4356 int err;
4357
4358 do {
4359 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4360 _nfs4_proc_getlk(state, cmd, request),
4361 &exception);
4362 } while (exception.retry);
4363 return err;
4364}
4365
4366static int do_vfs_lock(struct file *file, struct file_lock *fl)
4367{
4368 int res = 0;
4369 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4370 case FL_POSIX:
4371 res = posix_lock_file_wait(file, fl);
4372 break;
4373 case FL_FLOCK:
4374 res = flock_lock_file_wait(file, fl);
4375 break;
4376 default:
4377 BUG();
4378 }
1da177e4
LT		 4379 return res;
4380}
4381
faf5f49c 4382struct nfs4_unlockdata {
911d1aaf
TM		 4383 struct nfs_locku_args arg;
4384 struct nfs_locku_res res;
faf5f49c
TM		 4385 struct nfs4_lock_state *lsp;
4386 struct nfs_open_context *ctx;
911d1aaf
TM		 4387 struct file_lock fl;
4388 const struct nfs_server *server;
26e976a8 4389 unsigned long timestamp;
faf5f49c
TM		 4390};
4391
911d1aaf
TM		 4392static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4393 struct nfs_open_context *ctx,
4394 struct nfs4_lock_state *lsp,
4395 struct nfs_seqid *seqid)
4396{
4397 struct nfs4_unlockdata *p;
4398 struct inode *inode = lsp->ls_state->inode;
4399
8535b2be 4400 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 4401 if (p == NULL)
4402 return NULL;
4403 p->arg.fh = NFS_FH(inode);
4404 p->arg.fl = &p->fl;
4405 p->arg.seqid = seqid;
c1d51931 4406 p->res.seqid = seqid;
911d1aaf
TM		 4407 p->arg.stateid = &lsp->ls_stateid;
4408 p->lsp = lsp;
4409 atomic_inc(&lsp->ls_count);
4410 /* Ensure we don't close file until we're done freeing locks! */
4411 p->ctx = get_nfs_open_context(ctx);
4412 memcpy(&p->fl, fl, sizeof(p->fl));
4413 p->server = NFS_SERVER(inode);
4414 return p;
4415}
4416
06f814a3 4417static void nfs4_locku_release_calldata(void *data)
faf5f49c 4418{
963d8fe5 4419 struct nfs4_unlockdata *calldata = data;
911d1aaf 4420 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 4421 nfs4_put_lock_state(calldata->lsp);
4422 put_nfs_open_context(calldata->ctx);
4423 kfree(calldata);
faf5f49c
TM		 4424}
4425
963d8fe5 4426static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 4427{
963d8fe5 4428 struct nfs4_unlockdata *calldata = data;
faf5f49c 4429
14516c3a
TM		 4430 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4431 return;
faf5f49c
TM		 4432 switch (task->tk_status) {
4433 case 0:
f597c537
TM		 4434 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
4435 &calldata->res.stateid);
26e976a8 4436 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 4437 break;
9e33bed5
TM		 4438 case -NFS4ERR_BAD_STATEID:
4439 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 4440 case -NFS4ERR_STALE_STATEID:
4441 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 4442 break;
4443 default:
9e33bed5 4444 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
d00c5d43 4445 rpc_restart_call_prepare(task);
faf5f49c 4446 }
2b1bc308 4447 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 4448}
4449
4ce70ada 4450static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 4451{
4ce70ada 4452 struct nfs4_unlockdata *calldata = data;
faf5f49c 4453
911d1aaf 4454 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c 4455 return;
795a88c9 4456 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5
TM		 4457 /* Note: exit _without_ running nfs4_locku_done */
4458 task->tk_action = NULL;
b75ad4cd 4459 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 4460 return;
4461 }
26e976a8 4462 calldata->timestamp = jiffies;
035168ab 4463 if (nfs4_setup_sequence(calldata->server,
a893693c 4464 &calldata->arg.seq_args,
2240a9e2
TM		 4465 &calldata->res.seq_res,
4466 task) != 0)
4467 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 4468}
4469
963d8fe5 4470static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 4471 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 4472 .rpc_call_done = nfs4_locku_done,
06f814a3 4473 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 4474};
4475
a5d16a4d
TM		 4476static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4477 struct nfs_open_context *ctx,
4478 struct nfs4_lock_state *lsp,
4479 struct nfs_seqid *seqid)
4480{
4481 struct nfs4_unlockdata *data;
5138fde0
TM		 4482 struct rpc_message msg = {
4483 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4484 .rpc_cred = ctx->cred,
4485 };
c970aa85
TM		 4486 struct rpc_task_setup task_setup_data = {
4487 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 4488 .rpc_message = &msg,
c970aa85 4489 .callback_ops = &nfs4_locku_ops,
101070ca 4490 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4491 .flags = RPC_TASK_ASYNC,
4492 };
a5d16a4d 4493
137d6aca
FF		 4494 /* Ensure this is an unlock - when canceling a lock, the
4495 * canceled lock is passed in, and it won't be an unlock.
4496 */
4497 fl->fl_type = F_UNLCK;
4498
a5d16a4d
TM		 4499 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4500 if (data == NULL) {
4501 nfs_free_seqid(seqid);
4502 return ERR_PTR(-ENOMEM);
4503 }
4504
9d12b216 4505 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4506 msg.rpc_argp = &data->arg;
4507 msg.rpc_resp = &data->res;
c970aa85
TM		 4508 task_setup_data.callback_data = data;
4509 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 4510}
4511
faf5f49c
TM		 4512static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4513{
65b62a29
TM		 4514 struct inode *inode = state->inode;
4515 struct nfs4_state_owner *sp = state->owner;
4516 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 4517 struct nfs_seqid *seqid;
1da177e4 4518 struct nfs4_lock_state *lsp;
06f814a3
TM		 4519 struct rpc_task *task;
4520 int status = 0;
536ff0f8 4521 unsigned char fl_flags = request->fl_flags;
faf5f49c 4522
8d0a8a9d 4523 status = nfs4_set_lock_state(state, request);
9b073574
TM		 4524 /* Unlock _before_ we do the RPC call */
4525 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 4526 /* Exclude nfs_delegation_claim_locks() */
4527 mutex_lock(&sp->so_delegreturn_mutex);
4528 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57
TM		 4529 down_read(&nfsi->rwsem);
4530 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4531 up_read(&nfsi->rwsem);
65b62a29 4532 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 4533 goto out;
19e03c57
TM		 4534 }
4535 up_read(&nfsi->rwsem);
65b62a29 4536 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 4537 if (status != 0)
9b073574
TM		 4538 goto out;
4539 /* Is this a delegated lock? */
4540 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4541 goto out;
8d0a8a9d 4542 lsp = request->fl_u.nfs4_fl.owner;
8535b2be 4543 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 4544 status = -ENOMEM;
911d1aaf 4545 if (seqid == NULL)
9b073574 4546 goto out;
cd3758e3 4547 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 4548 status = PTR_ERR(task);
4549 if (IS_ERR(task))
9b073574 4550 goto out;
a5d16a4d 4551 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 4552 rpc_put_task(task);
9b073574 4553out:
536ff0f8 4554 request->fl_flags = fl_flags;
1da177e4
LT		 4555 return status;
4556}
4557
a5d16a4d
TM		 4558struct nfs4_lockdata {
4559 struct nfs_lock_args arg;
4560 struct nfs_lock_res res;
4561 struct nfs4_lock_state *lsp;
4562 struct nfs_open_context *ctx;
4563 struct file_lock fl;
26e976a8 4564 unsigned long timestamp;
a5d16a4d
TM		 4565 int rpc_status;
4566 int cancelled;
66179efe 4567 struct nfs_server *server;
a5d16a4d
TM		 4568};
4569
4570static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 4571 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4572 gfp_t gfp_mask)
1da177e4 4573{
a5d16a4d
TM		 4574 struct nfs4_lockdata *p;
4575 struct inode *inode = lsp->ls_state->inode;
1da177e4 4576 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 4577
8535b2be 4578 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 4579 if (p == NULL)
4580 return NULL;
4581
4582 p->arg.fh = NFS_FH(inode);
4583 p->arg.fl = &p->fl;
8535b2be 4584 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 4585 if (p->arg.open_seqid == NULL)
4586 goto out_free;
8535b2be 4587 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 4588 if (p->arg.lock_seqid == NULL)
2f74c0a0 4589 goto out_free_seqid;
a5d16a4d 4590 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 4591 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 4592 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4593 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 4594 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 4595 p->lsp = lsp;
66179efe 4596 p->server = server;
a5d16a4d
TM		 4597 atomic_inc(&lsp->ls_count);
4598 p->ctx = get_nfs_open_context(ctx);
4599 memcpy(&p->fl, fl, sizeof(p->fl));
4600 return p;
2f74c0a0
TM		 4601out_free_seqid:
4602 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 4603out_free:
4604 kfree(p);
4605 return NULL;
4606}
4607
4608static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4609{
4610 struct nfs4_lockdata *data = calldata;
4611 struct nfs4_state *state = data->lsp->ls_state;
06735b34 4612
3110ff80 4613 dprintk("%s: begin!\n", __func__);
2f74c0a0
TM		 4614 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4615 return;
a5d16a4d
TM		 4616 /* Do we need to do an open_to_lock_owner? */
4617 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
8fe72bac 4618 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 4619 goto out_release_lock_seqid;
8fe72bac 4620 }
a5d16a4d
TM		 4621 data->arg.open_stateid = &state->stateid;
4622 data->arg.new_lock_owner = 1;
c1d51931 4623 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 4624 } else
4625 data->arg.new_lock_owner = 0;
26e976a8 4626 data->timestamp = jiffies;
035168ab
TM		 4627 if (nfs4_setup_sequence(data->server,
4628 &data->arg.seq_args,
2240a9e2 4629 &data->res.seq_res,
d9afbd1b 4630 task) == 0)
66179efe 4631 return;
2240a9e2
TM		 4632 nfs_release_seqid(data->arg.open_seqid);
4633out_release_lock_seqid:
4634 nfs_release_seqid(data->arg.lock_seqid);
8fe72bac 4635 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 4636}
4637
a5d16a4d
TM		 4638static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4639{
4640 struct nfs4_lockdata *data = calldata;
4641
3110ff80 4642 dprintk("%s: begin!\n", __func__);
a5d16a4d 4643
14516c3a
TM		 4644 if (!nfs4_sequence_done(task, &data->res.seq_res))
4645 return;
66179efe 4646
a5d16a4d 4647 data->rpc_status = task->tk_status;
a5d16a4d 4648 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 4649 if (data->rpc_status == 0)
4650 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4651 else
4652 goto out;
4653 }
4654 if (data->rpc_status == 0) {
f597c537 4655 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
795a88c9 4656 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
3d4ff43d 4657 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 4658 }
a5d16a4d 4659out:
3110ff80 4660 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 4661}
4662
4663static void nfs4_lock_release(void *calldata)
4664{
4665 struct nfs4_lockdata *data = calldata;
4666
3110ff80 4667 dprintk("%s: begin!\n", __func__);
2f74c0a0 4668 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 4669 if (data->cancelled != 0) {
4670 struct rpc_task *task;
4671 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4672 data->arg.lock_seqid);
4673 if (!IS_ERR(task))
bf294b41 4674 rpc_put_task_async(task);
3110ff80 4675 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 4676 } else
4677 nfs_free_seqid(data->arg.lock_seqid);
4678 nfs4_put_lock_state(data->lsp);
4679 put_nfs_open_context(data->ctx);
4680 kfree(data);
3110ff80 4681 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 4682}
4683
4684static const struct rpc_call_ops nfs4_lock_ops = {
4685 .rpc_call_prepare = nfs4_lock_prepare,
4686 .rpc_call_done = nfs4_lock_done,
4687 .rpc_release = nfs4_lock_release,
4688};
4689
2bee72a6
TM		 4690static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4691{
2bee72a6
TM		 4692 switch (error) {
4693 case -NFS4ERR_ADMIN_REVOKED:
4694 case -NFS4ERR_BAD_STATEID:
ecac799a 4695 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 4696 if (new_lock_owner != 0 ||
795a88c9 4697 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 4698 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 4699 break;
4700 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4701 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 4702 case -NFS4ERR_EXPIRED:
4703 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 4704 };
4705}
4706
afe6c27c 4707static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 4708{
4709 struct nfs4_lockdata *data;
4710 struct rpc_task *task;
5138fde0
TM		 4711 struct rpc_message msg = {
4712 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4713 .rpc_cred = state->owner->so_cred,
4714 };
c970aa85
TM		 4715 struct rpc_task_setup task_setup_data = {
4716 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4717 .rpc_message = &msg,
c970aa85 4718 .callback_ops = &nfs4_lock_ops,
101070ca 4719 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4720 .flags = RPC_TASK_ASYNC,
4721 };
a5d16a4d
TM		 4722 int ret;
4723
3110ff80 4724 dprintk("%s: begin!\n", __func__);
cd3758e3 4725 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 4726 fl->fl_u.nfs4_fl.owner,
4727 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 4728 if (data == NULL)
4729 return -ENOMEM;
4730 if (IS_SETLKW(cmd))
4731 data->arg.block = 1;
9d12b216 4732 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4733 msg.rpc_argp = &data->arg;
4734 msg.rpc_resp = &data->res;
c970aa85 4735 task_setup_data.callback_data = data;
8fe72bac
TM		 4736 if (recovery_type > NFS_LOCK_NEW) {
4737 if (recovery_type == NFS_LOCK_RECLAIM)
4738 data->arg.reclaim = NFS_LOCK_RECLAIM;
4739 nfs4_set_sequence_privileged(&data->arg.seq_args);
4740 }
c970aa85 4741 task = rpc_run_task(&task_setup_data);
7a1218a2 4742 if (IS_ERR(task))
a5d16a4d 4743 return PTR_ERR(task);
a5d16a4d
TM		 4744 ret = nfs4_wait_for_completion_rpc_task(task);
4745 if (ret == 0) {
4746 ret = data->rpc_status;
2bee72a6
TM		 4747 if (ret)
4748 nfs4_handle_setlk_error(data->server, data->lsp,
4749 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 4750 } else
4751 data->cancelled = 1;
e6b3c4db 4752 rpc_put_task(task);
3110ff80 4753 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 4754 return ret;
1da177e4
LT		 4755}
4756
4757static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4758{
202b50dc 4759 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 4760 struct nfs4_exception exception = {
4761 .inode = state->inode,
4762 };
202b50dc
TM		 4763 int err;
4764
4765 do {
42a2d13e
TM		 4766 /* Cache the lock if possible... */
4767 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4768 return 0;
afe6c27c 4769 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 4770 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 4771 break;
4772 nfs4_handle_exception(server, err, &exception);
4773 } while (exception.retry);
4774 return err;
1da177e4
LT		 4775}
4776
4777static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4778{
202b50dc 4779 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 4780 struct nfs4_exception exception = {
4781 .inode = state->inode,
4782 };
202b50dc
TM		 4783 int err;
4784
6bfc93ef
TM		 4785 err = nfs4_set_lock_state(state, request);
4786 if (err != 0)
4787 return err;
202b50dc 4788 do {
42a2d13e
TM		 4789 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4790 return 0;
afe6c27c 4791 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 4792 switch (err) {
4793 default:
4794 goto out;
4795 case -NFS4ERR_GRACE:
4796 case -NFS4ERR_DELAY:
4797 nfs4_handle_exception(server, err, &exception);
4798 err = 0;
4799 }
202b50dc 4800 } while (exception.retry);
a9ed2e25 4801out:
202b50dc 4802 return err;
1da177e4
LT		 4803}
4804
f062eb6c 4805#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 4806/**
4807 * nfs41_check_expired_locks - possibly free a lock stateid
4808 *
4809 * @state: NFSv4 state for an inode
4810 *
4811 * Returns NFS_OK if recovery for this stateid is now finished.
4812 * Otherwise a negative NFS4ERR value is returned.
4813 */
b01dd1d8 4814static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 4815{
eb64cf96 4816 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 4817 struct nfs4_lock_state *lsp;
f062eb6c
BS		 4818 struct nfs_server *server = NFS_SERVER(state->inode);
4819
b01dd1d8 4820 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 4821 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
b01dd1d8
BS		 4822 status = nfs41_test_stateid(server, &lsp->ls_stateid);
4823 if (status != NFS_OK) {
3e60ffdd
CL		 4824 /* Free the stateid unless the server
4825 * informs us the stateid is unrecognized. */
89af2739
CL		 4826 if (status != -NFS4ERR_BAD_STATEID)
4827 nfs41_free_stateid(server,
4828 &lsp->ls_stateid);
795a88c9 4829 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 4830 ret = status;
4831 }
4832 }
4833 };
4834
4835 return ret;
4836}
4837
4838static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
4839{
4840 int status = NFS_OK;
4841
4842 if (test_bit(LK_STATE_IN_USE, &state->flags))
4843 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 4844 if (status != NFS_OK)
4845 status = nfs4_lock_expired(state, request);
4846 return status;
f062eb6c
BS		 4847}
4848#endif
4849
1da177e4
LT		 4850static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4851{
9a99af49 4852 struct nfs4_state_owner *sp = state->owner;
19e03c57 4853 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 4854 unsigned char fl_flags = request->fl_flags;
9a99af49 4855 unsigned int seq;
8e469ebd 4856 int status = -ENOLCK;
1da177e4 4857
8e469ebd
TM		 4858 if ((fl_flags & FL_POSIX) &&
4859 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4860 goto out;
6bfc93ef 4861 /* Is this a delegated open? */
6bfc93ef
TM		 4862 status = nfs4_set_lock_state(state, request);
4863 if (status != 0)
4864 goto out;
01c3b861
TM		 4865 request->fl_flags |= FL_ACCESS;
4866 status = do_vfs_lock(request->fl_file, request);
4867 if (status < 0)
4868 goto out;
19e03c57 4869 down_read(&nfsi->rwsem);
01c3b861 4870 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 4871 /* Yes: cache locks! */
01c3b861 4872 /* ...but avoid races with delegation recall... */
19e03c57
TM		 4873 request->fl_flags = fl_flags & ~FL_SLEEP;
4874 status = do_vfs_lock(request->fl_file, request);
4875 goto out_unlock;
01c3b861 4876 }
9a99af49
TM		 4877 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
4878 up_read(&nfsi->rwsem);
afe6c27c 4879 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 4880 if (status != 0)
9a99af49
TM		 4881 goto out;
4882 down_read(&nfsi->rwsem);
4883 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
4884 status = -NFS4ERR_DELAY;
01c3b861 4885 goto out_unlock;
9a99af49 4886 }
6bfc93ef 4887 /* Note: we always want to sleep here! */
01c3b861 4888 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 4889 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 4890 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
4891 "manager!\n", __func__);
01c3b861 4892out_unlock:
19e03c57 4893 up_read(&nfsi->rwsem);
01c3b861
TM		 4894out:
4895 request->fl_flags = fl_flags;
1da177e4
LT		 4896 return status;
4897}
4898
4899static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4900{
a1d0b5ee
TM		 4901 struct nfs4_exception exception = {
4902 .state = state,
05ffe24f 4903 .inode = state->inode,
a1d0b5ee 4904 };
1da177e4
LT		 4905 int err;
4906
4907 do {
965b5d67
TM		 4908 err = _nfs4_proc_setlk(state, cmd, request);
4909 if (err == -NFS4ERR_DENIED)
4910 err = -EAGAIN;
1da177e4 4911 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 4912 err, &exception);
1da177e4
LT		 4913 } while (exception.retry);
4914 return err;
4915}
4916
4917static int
4918nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4919{
4920 struct nfs_open_context *ctx;
4921 struct nfs4_state *state;
4922 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4923 int status;
4924
4925 /* verify open state */
cd3758e3 4926 ctx = nfs_file_open_context(filp);
1da177e4
LT		 4927 state = ctx->state;
4928
4929 if (request->fl_start < 0 || request->fl_end < 0)
4930 return -EINVAL;
4931
d953126a
TM		 4932 if (IS_GETLK(cmd)) {
4933 if (state != NULL)
4934 return nfs4_proc_getlk(state, F_GETLK, request);
4935 return 0;
4936 }
1da177e4
LT		 4937
4938 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4939 return -EINVAL;
4940
d953126a
TM		 4941 if (request->fl_type == F_UNLCK) {
4942 if (state != NULL)
4943 return nfs4_proc_unlck(state, cmd, request);
4944 return 0;
4945 }
1da177e4 4946
d953126a
TM		 4947 if (state == NULL)
4948 return -ENOLCK;
55725513
TM		 4949 /*
4950 * Don't rely on the VFS having checked the file open mode,
4951 * since it won't do this for flock() locks.
4952 */
f44106e2 4953 switch (request->fl_type) {
55725513
TM		 4954 case F_RDLCK:
4955 if (!(filp->f_mode & FMODE_READ))
4956 return -EBADF;
4957 break;
4958 case F_WRLCK:
4959 if (!(filp->f_mode & FMODE_WRITE))
4960 return -EBADF;
4961 }
4962
1da177e4
LT		 4963 do {
4964 status = nfs4_proc_setlk(state, cmd, request);
4965 if ((status != -EAGAIN) || IS_SETLK(cmd))
4966 break;
4967 timeout = nfs4_set_lock_task_retry(timeout);
4968 status = -ERESTARTSYS;
4969 if (signalled())
4970 break;
4971 } while(status < 0);
1da177e4
LT		 4972 return status;
4973}
4974
888e694c
TM		 4975int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4976{
4977 struct nfs_server *server = NFS_SERVER(state->inode);
4978 struct nfs4_exception exception = { };
4979 int err;
4980
4981 err = nfs4_set_lock_state(state, fl);
4982 if (err != 0)
4983 goto out;
4984 do {
afe6c27c 4985 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
d5122201
TM		 4986 switch (err) {
4987 default:
a030889a
WAA		 4988 printk(KERN_ERR "NFS: %s: unhandled error "
4989 "%d.\n", __func__, err);
d5122201 4990 case 0:
965b5d67 4991 case -ESTALE:
d5122201 4992 goto out;
d5122201 4993 case -NFS4ERR_STALE_CLIENTID:
965b5d67 4994 case -NFS4ERR_STALE_STATEID:
37380e42
TM		 4995 set_bit(NFS_DELEGATED_STATE, &state->flags);
4996 case -NFS4ERR_EXPIRED:
0400a6b0 4997 nfs4_schedule_lease_recovery(server->nfs_client);
37380e42 4998 err = -EAGAIN;
0400a6b0 4999 goto out;
74e7bb73
RL		 5000 case -NFS4ERR_BADSESSION:
5001 case -NFS4ERR_BADSLOT:
5002 case -NFS4ERR_BAD_HIGH_SLOT:
5003 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
5004 case -NFS4ERR_DEADSESSION:
37380e42 5005 set_bit(NFS_DELEGATED_STATE, &state->flags);
9f594791 5006 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
37380e42 5007 err = -EAGAIN;
d5122201 5008 goto out;
a1d0b5ee 5009 case -NFS4ERR_DELEG_REVOKED:
965b5d67
TM		 5010 case -NFS4ERR_ADMIN_REVOKED:
5011 case -NFS4ERR_BAD_STATEID:
5012 case -NFS4ERR_OPENMODE:
0400a6b0 5013 nfs4_schedule_stateid_recovery(server, state);
965b5d67
TM		 5014 err = 0;
5015 goto out;
5016 case -ENOMEM:
5017 case -NFS4ERR_DENIED:
5018 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
5019 err = 0;
5020 goto out;
d5122201 5021 }
37380e42 5022 set_bit(NFS_DELEGATED_STATE, &state->flags);
888e694c
TM		 5023 err = nfs4_handle_exception(server, err, &exception);
5024 } while (exception.retry);
5025out:
5026 return err;
5027}
6b3b5496 5028
cf470c3e
TM		 5029struct nfs_release_lockowner_data {
5030 struct nfs4_lock_state *lsp;
5ae67c4f 5031 struct nfs_server *server;
cf470c3e
TM		 5032 struct nfs_release_lockowner_args args;
5033};
5034
d3c7b7cc
TM		 5035static void nfs4_release_lockowner_release(void *calldata)
5036{
cf470c3e 5037 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 5038 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 5039 kfree(calldata);
5040}
5041
17280175 5042static const struct rpc_call_ops nfs4_release_lockowner_ops = {
d3c7b7cc
TM		 5043 .rpc_release = nfs4_release_lockowner_release,
5044};
5045
cf470c3e 5046int nfs4_release_lockowner(struct nfs4_lock_state *lsp)
d3c7b7cc
TM		 5047{
5048 struct nfs_server *server = lsp->ls_state->owner->so_server;
cf470c3e 5049 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 5050 struct rpc_message msg = {
5051 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
5052 };
5053
5054 if (server->nfs_client->cl_mvops->minor_version != 0)
cf470c3e
TM		 5055 return -EINVAL;
5056 data = kmalloc(sizeof(*data), GFP_NOFS);
5057 if (!data)
5058 return -ENOMEM;
5059 data->lsp = lsp;
5ae67c4f 5060 data->server = server;
cf470c3e
TM		 5061 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5062 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5063 data->args.lock_owner.s_dev = server->s_dev;
5064 msg.rpc_argp = &data->args;
5065 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5066 return 0;
d3c7b7cc
TM		 5067}
5068
aa1870af
BF		 5069#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5070
64c2ce8b
AK		 5071static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5072 const void *buf, size_t buflen,
5073 int flags, int type)
6b3b5496 5074{
64c2ce8b
AK		 5075 if (strcmp(key, "") != 0)
5076 return -EINVAL;
4b580ee3 5077
64c2ce8b 5078 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5079}
5080
64c2ce8b
AK		 5081static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5082 void *buf, size_t buflen, int type)
6b3b5496 5083{
64c2ce8b
AK		 5084 if (strcmp(key, "") != 0)
5085 return -EINVAL;
aa1870af 5086
64c2ce8b 5087 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5088}
5089
64c2ce8b
AK		 5090static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5091 size_t list_len, const char *name,
5092 size_t name_len, int type)
6b3b5496 5093{
64c2ce8b 5094 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 5095
096455a2
BF		 5096 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5097 return 0;
64c2ce8b
AK		 5098
5099 if (list && len <= list_len)
5100 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 5101 return len;
6b3b5496
BF		 5102}
5103
533eb461
AA		 5104/*
5105 * nfs_fhget will use either the mounted_on_fileid or the fileid
5106 */
69aaaae1
TM		 5107static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5108{
533eb461
AA		 5109 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5110 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5111 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 5112 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 5113 return;
5114
5115 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 5116 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 5117 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5118 fattr->nlink = 2;
5119}
5120
f05d147f
BS		 5121static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5122 const struct qstr *name,
5123 struct nfs4_fs_locations *fs_locations,
5124 struct page *page)
683b57b4
TM		 5125{
5126 struct nfs_server *server = NFS_SERVER(dir);
5127 u32 bitmask[2] = {
361e624f 5128 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 5129 };
5130 struct nfs4_fs_locations_arg args = {
5131 .dir_fh = NFS_FH(dir),
c228fd3a 5132 .name = name,
683b57b4
TM		 5133 .page = page,
5134 .bitmask = bitmask,
5135 };
22958463
BH		 5136 struct nfs4_fs_locations_res res = {
5137 .fs_locations = fs_locations,
5138 };
683b57b4
TM		 5139 struct rpc_message msg = {
5140 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5141 .rpc_argp = &args,
22958463 5142 .rpc_resp = &res,
683b57b4
TM		 5143 };
5144 int status;
5145
3110ff80 5146 dprintk("%s: start\n", __func__);
533eb461
AA		 5147
5148 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5149 * is not supported */
5150 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5151 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5152 else
5153 bitmask[0] |= FATTR4_WORD0_FILEID;
5154
c228fd3a 5155 nfs_fattr_init(&fs_locations->fattr);
683b57b4 5156 fs_locations->server = server;
830b8e33 5157 fs_locations->nlocations = 0;
f05d147f 5158 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 5159 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 5160 return status;
5161}
5162
f05d147f
BS		 5163int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5164 const struct qstr *name,
5165 struct nfs4_fs_locations *fs_locations,
5166 struct page *page)
db0a9593
BS		 5167{
5168 struct nfs4_exception exception = { };
5169 int err;
5170 do {
5171 err = nfs4_handle_exception(NFS_SERVER(dir),
f05d147f 5172 _nfs4_proc_fs_locations(client, dir, name, fs_locations, page),
db0a9593
BS		 5173 &exception);
5174 } while (exception.retry);
5175 return err;
5176}
5177
5a5ea0d4
BS		 5178static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
5179{
5180 int status;
5181 struct nfs4_secinfo_arg args = {
5182 .dir_fh = NFS_FH(dir),
5183 .name = name,
5184 };
5185 struct nfs4_secinfo_res res = {
5186 .flavors = flavors,
5187 };
5188 struct rpc_message msg = {
5189 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
5190 .rpc_argp = &args,
5191 .rpc_resp = &res,
5192 };
5193
5194 dprintk("NFS call secinfo %s\n", name->name);
5195 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
5196 dprintk("NFS reply secinfo: %d\n", status);
5197 return status;
5198}
5199
72de53ec
BS		 5200int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
5201 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 5202{
5203 struct nfs4_exception exception = { };
5204 int err;
5205 do {
5206 err = nfs4_handle_exception(NFS_SERVER(dir),
5207 _nfs4_proc_secinfo(dir, name, flavors),
5208 &exception);
5209 } while (exception.retry);
5210 return err;
5211}
5212
557134a3 5213#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 5214/*
5215 * Check the exchange flags returned by the server for invalid flags, having
5216 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
5217 * DS flags set.
5218 */
5219static int nfs4_check_cl_exchange_flags(u32 flags)
5220{
5221 if (flags & ~EXCHGID4_FLAG_MASK_R)
5222 goto out_inval;
5223 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
5224 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
5225 goto out_inval;
5226 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
5227 goto out_inval;
5228 return NFS_OK;
5229out_inval:
5230 return -NFS4ERR_INVAL;
5231}
5232
78fe0f41 5233static bool
79d4e1f0
CL		 5234nfs41_same_server_scope(struct nfs41_server_scope *a,
5235 struct nfs41_server_scope *b)
78fe0f41
WAA		 5236{
5237 if (a->server_scope_sz == b->server_scope_sz &&
5238 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
5239 return true;
5240
5241 return false;
5242}
5243
7c44f1ae
WAA		 5244/*
5245 * nfs4_proc_bind_conn_to_session()
5246 *
5247 * The 4.1 client currently uses the same TCP connection for the
5248 * fore and backchannel.
5249 */
2cf047c9 5250int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 5251{
5252 int status;
5253 struct nfs41_bind_conn_to_session_res res;
5254 struct rpc_message msg = {
5255 .rpc_proc =
5256 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
5257 .rpc_argp = clp,
5258 .rpc_resp = &res,
2cf047c9 5259 .rpc_cred = cred,
7c44f1ae
WAA		 5260 };
5261
5262 dprintk("--> %s\n", __func__);
7c44f1ae
WAA		 5263
5264 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5265 if (unlikely(res.session == NULL)) {
5266 status = -ENOMEM;
5267 goto out;
5268 }
5269
5270 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5271 if (status == 0) {
5272 if (memcmp(res.session->sess_id.data,
5273 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
5274 dprintk("NFS: %s: Session ID mismatch\n", __func__);
5275 status = -EIO;
5276 goto out_session;
5277 }
5278 if (res.dir != NFS4_CDFS4_BOTH) {
5279 dprintk("NFS: %s: Unexpected direction from server\n",
5280 __func__);
5281 status = -EIO;
5282 goto out_session;
5283 }
5284 if (res.use_conn_in_rdma_mode) {
5285 dprintk("NFS: %s: Server returned RDMA mode = true\n",
5286 __func__);
5287 status = -EIO;
5288 goto out_session;
5289 }
5290 }
5291out_session:
5292 kfree(res.session);
5293out:
5294 dprintk("<-- %s status= %d\n", __func__, status);
5295 return status;
5296}
5297
99fe60d0
BH		 5298/*
5299 * nfs4_proc_exchange_id()
5300 *
6bbb4ae8
CL		 5301 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5302 *
99fe60d0
BH		 5303 * Since the clientid has expired, all compounds using sessions
5304 * associated with the stale clientid will be returning
5305 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
5306 * be in some phase of session reset.
5307 */
4d643d1d 5308int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 5309{
5310 nfs4_verifier verifier;
5311 struct nfs41_exchange_id_args args = {
cd93710e 5312 .verifier = &verifier,
99fe60d0 5313 .client = clp,
357f54d6 5314 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
99fe60d0
BH		 5315 };
5316 struct nfs41_exchange_id_res res = {
32b01310 5317 0
99fe60d0
BH		 5318 };
5319 int status;
5320 struct rpc_message msg = {
5321 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
5322 .rpc_argp = &args,
5323 .rpc_resp = &res,
5324 .rpc_cred = cred,
5325 };
99fe60d0 5326
f092075d 5327 nfs4_init_boot_verifier(clp, &verifier);
e984a55a
CL		 5328 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
5329 sizeof(args.id));
6bbb4ae8
CL		 5330 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
5331 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5332 args.id_len, args.id);
99fe60d0 5333
acdeb69d 5334 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 5335 GFP_NOFS);
acdeb69d 5336 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 5337 status = -ENOMEM;
5338 goto out;
5339 }
78fe0f41 5340
79d4e1f0 5341 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 5342 GFP_NOFS);
177313f1 5343 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 5344 status = -ENOMEM;
acdeb69d 5345 goto out_server_owner;
abe9a6d5 5346 }
78fe0f41 5347
bbafffd2 5348 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 5349 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 5350 status = -ENOMEM;
5351 goto out_server_scope;
5352 }
5353
1bd714f2 5354 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
177313f1 5355 if (status == 0)
32b01310 5356 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 5357
acdeb69d 5358 if (status == 0) {
32b01310
TM		 5359 clp->cl_clientid = res.clientid;
5360 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
5361 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
5362 clp->cl_seqid = res.seqid;
5363
acdeb69d
CL		 5364 kfree(clp->cl_serverowner);
5365 clp->cl_serverowner = res.server_owner;
5366 res.server_owner = NULL;
78fe0f41 5367
7d2ed9ac 5368 /* use the most recent implementation id */
59155546
CL		 5369 kfree(clp->cl_implid);
5370 clp->cl_implid = res.impl_id;
7d2ed9ac 5371
177313f1 5372 if (clp->cl_serverscope != NULL &&
79d4e1f0 5373 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 5374 res.server_scope)) {
5375 dprintk("%s: server_scope mismatch detected\n",
5376 __func__);
5377 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 5378 kfree(clp->cl_serverscope);
5379 clp->cl_serverscope = NULL;
78fe0f41
WAA		 5380 }
5381
177313f1 5382 if (clp->cl_serverscope == NULL) {
79d4e1f0 5383 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 5384 goto out;
5385 }
32b01310
TM		 5386 } else
5387 kfree(res.impl_id);
7d2ed9ac 5388
acdeb69d
CL		 5389out_server_owner:
5390 kfree(res.server_owner);
7d2ed9ac 5391out_server_scope:
abe9a6d5
WAA		 5392 kfree(res.server_scope);
5393out:
177313f1 5394 if (clp->cl_implid != NULL)
6bbb4ae8 5395 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 5396 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 5397 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 5398 clp->cl_implid->date.seconds,
5399 clp->cl_implid->date.nseconds);
6bbb4ae8 5400 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 5401 return status;
5402}
5403
66245539
TM		 5404static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
5405 struct rpc_cred *cred)
5406{
5407 struct rpc_message msg = {
5408 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
5409 .rpc_argp = clp,
5410 .rpc_cred = cred,
5411 };
5412 int status;
5413
5414 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5415 if (status)
02c67525 5416 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 5417 "DESTROY_CLIENTID.", status, clp->cl_hostname);
5418 return status;
5419}
5420
5421static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
5422 struct rpc_cred *cred)
5423{
5424 unsigned int loop;
5425 int ret;
5426
5427 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
5428 ret = _nfs4_proc_destroy_clientid(clp, cred);
5429 switch (ret) {
5430 case -NFS4ERR_DELAY:
5431 case -NFS4ERR_CLIENTID_BUSY:
5432 ssleep(1);
5433 break;
5434 default:
5435 return ret;
5436 }
5437 }
5438 return 0;
5439}
5440
5441int nfs4_destroy_clientid(struct nfs_client *clp)
5442{
5443 struct rpc_cred *cred;
5444 int ret = 0;
5445
5446 if (clp->cl_mvops->minor_version < 1)
5447 goto out;
5448 if (clp->cl_exchange_flags == 0)
5449 goto out;
05f4c350
CL		 5450 if (clp->cl_preserve_clid)
5451 goto out;
66245539
TM		 5452 cred = nfs4_get_exchange_id_cred(clp);
5453 ret = nfs4_proc_destroy_clientid(clp, cred);
5454 if (cred)
5455 put_rpccred(cred);
5456 switch (ret) {
5457 case 0:
5458 case -NFS4ERR_STALE_CLIENTID:
5459 clp->cl_exchange_flags = 0;
5460 }
5461out:
5462 return ret;
5463}
5464
2050f0cc
AA		 5465struct nfs4_get_lease_time_data {
5466 struct nfs4_get_lease_time_args *args;
5467 struct nfs4_get_lease_time_res *res;
5468 struct nfs_client *clp;
5469};
5470
5471static void nfs4_get_lease_time_prepare(struct rpc_task *task,
5472 void *calldata)
5473{
2050f0cc
AA		 5474 struct nfs4_get_lease_time_data *data =
5475 (struct nfs4_get_lease_time_data *)calldata;
5476
5477 dprintk("--> %s\n", __func__);
5478 /* just setup sequence, do not trigger session recovery
5479 since we're invoked within one */
d9afbd1b
TM		 5480 nfs41_setup_sequence(data->clp->cl_session,
5481 &data->args->la_seq_args,
5482 &data->res->lr_seq_res,
5483 task);
2050f0cc
AA		 5484 dprintk("<-- %s\n", __func__);
5485}
5486
5487/*
5488 * Called from nfs4_state_manager thread for session setup, so don't recover
5489 * from sequence operation or clientid errors.
5490 */
5491static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
5492{
5493 struct nfs4_get_lease_time_data *data =
5494 (struct nfs4_get_lease_time_data *)calldata;
5495
5496 dprintk("--> %s\n", __func__);
14516c3a
TM		 5497 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
5498 return;
2050f0cc
AA		 5499 switch (task->tk_status) {
5500 case -NFS4ERR_DELAY:
5501 case -NFS4ERR_GRACE:
5502 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5503 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5504 task->tk_status = 0;
a8a4ae3a
AA		 5505 /* fall through */
5506 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 5507 rpc_restart_call_prepare(task);
2050f0cc
AA		 5508 return;
5509 }
2050f0cc
AA		 5510 dprintk("<-- %s\n", __func__);
5511}
5512
17280175 5513static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 5514 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5515 .rpc_call_done = nfs4_get_lease_time_done,
5516};
5517
5518int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5519{
5520 struct rpc_task *task;
5521 struct nfs4_get_lease_time_args args;
5522 struct nfs4_get_lease_time_res res = {
5523 .lr_fsinfo = fsinfo,
5524 };
5525 struct nfs4_get_lease_time_data data = {
5526 .args = &args,
5527 .res = &res,
5528 .clp = clp,
5529 };
5530 struct rpc_message msg = {
5531 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5532 .rpc_argp = &args,
5533 .rpc_resp = &res,
5534 };
5535 struct rpc_task_setup task_setup = {
5536 .rpc_client = clp->cl_rpcclient,
5537 .rpc_message = &msg,
5538 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 5539 .callback_data = &data,
5540 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 5541 };
5542 int status;
5543
9d12b216 5544 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 5545 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 5546 dprintk("--> %s\n", __func__);
5547 task = rpc_run_task(&task_setup);
5548
5549 if (IS_ERR(task))
5550 status = PTR_ERR(task);
5551 else {
5552 status = task->tk_status;
5553 rpc_put_task(task);
5554 }
5555 dprintk("<-- %s return %d\n", __func__, status);
5556
5557 return status;
5558}
5559
fc931582
AA		 5560/*
5561 * Initialize the values to be used by the client in CREATE_SESSION
5562 * If nfs4_init_session set the fore channel request and response sizes,
5563 * use them.
5564 *
5565 * Set the back channel max_resp_sz_cached to zero to force the client to
5566 * always set csa_cachethis to FALSE because the current implementation
5567 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5568 */
5569static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5570{
5571 struct nfs4_session *session = args->client->cl_session;
ae72ae67
TM		 5572 unsigned int mxrqst_sz = session->fc_target_max_rqst_sz,
5573 mxresp_sz = session->fc_target_max_resp_sz;
fc931582
AA		 5574
5575 if (mxrqst_sz == 0)
5576 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5577 if (mxresp_sz == 0)
5578 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5579 /* Fore channel attributes */
fc931582
AA		 5580 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5581 args->fc_attrs.max_resp_sz = mxresp_sz;
fc931582 5582 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 5583 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 5584
5585 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 5586 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 5587 __func__,
5588 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 5589 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 5590
5591 /* Back channel attributes */
fc931582
AA		 5592 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5593 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5594 args->bc_attrs.max_resp_sz_cached = 0;
5595 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5596 args->bc_attrs.max_reqs = 1;
5597
5598 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5599 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5600 __func__,
5601 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5602 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5603 args->bc_attrs.max_reqs);
5604}
5605
43c2e885 5606static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 5607{
43c2e885
BF		 5608 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5609 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5610
43c2e885
BF		 5611 if (rcvd->max_resp_sz > sent->max_resp_sz)
5612 return -EINVAL;
5613 /*
5614 * Our requested max_ops is the minimum we need; we're not
5615 * prepared to break up compounds into smaller pieces than that.
5616 * So, no point even trying to continue if the server won't
5617 * cooperate:
5618 */
5619 if (rcvd->max_ops < sent->max_ops)
5620 return -EINVAL;
5621 if (rcvd->max_reqs == 0)
5622 return -EINVAL;
b4b9a0c1
VG		 5623 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
5624 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 5625 return 0;
8d35301d
AA		 5626}
5627
43c2e885
BF		 5628static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5629{
5630 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5631 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 5632
43c2e885
BF		 5633 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5634 return -EINVAL;
5635 if (rcvd->max_resp_sz < sent->max_resp_sz)
5636 return -EINVAL;
5637 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5638 return -EINVAL;
5639 /* These would render the backchannel useless: */
b4b9a0c1 5640 if (rcvd->max_ops != sent->max_ops)
43c2e885 5641 return -EINVAL;
b4b9a0c1 5642 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 5643 return -EINVAL;
5644 return 0;
5645}
8d35301d 5646
8d35301d
AA		 5647static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5648 struct nfs4_session *session)
5649{
43c2e885 5650 int ret;
8d35301d 5651
43c2e885
BF		 5652 ret = nfs4_verify_fore_channel_attrs(args, session);
5653 if (ret)
5654 return ret;
5655 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 5656}
5657
848f5bda
TM		 5658static int _nfs4_proc_create_session(struct nfs_client *clp,
5659 struct rpc_cred *cred)
fc931582
AA		 5660{
5661 struct nfs4_session *session = clp->cl_session;
5662 struct nfs41_create_session_args args = {
5663 .client = clp,
5664 .cb_program = NFS4_CALLBACK,
5665 };
5666 struct nfs41_create_session_res res = {
5667 .client = clp,
5668 };
5669 struct rpc_message msg = {
5670 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5671 .rpc_argp = &args,
5672 .rpc_resp = &res,
848f5bda 5673 .rpc_cred = cred,
fc931582
AA		 5674 };
5675 int status;
5676
5677 nfs4_init_channel_attrs(&args);
0f91421e 5678 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 5679
1bd714f2 5680 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
fc931582 5681
43095d39 5682 if (!status) {
8d35301d
AA		 5683 /* Verify the session's negotiated channel_attrs values */
5684 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 5685 /* Increment the clientid slot sequence id */
5686 clp->cl_seqid++;
5687 }
5688
5689 return status;
5690}
5691
5692/*
5693 * Issues a CREATE_SESSION operation to the server.
5694 * It is the responsibility of the caller to verify the session is
5695 * expired before calling this routine.
5696 */
848f5bda 5697int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 5698{
5699 int status;
5700 unsigned *ptr;
fc931582
AA		 5701 struct nfs4_session *session = clp->cl_session;
5702
5703 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5704
848f5bda 5705 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 5706 if (status)
5707 goto out;
5708
aacd5537
AA		 5709 /* Init or reset the session slot tables */
5710 status = nfs4_setup_session_slot_tables(session);
5711 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 5712 if (status)
5713 goto out;
5714
5715 ptr = (unsigned *)&session->sess_id.data[0];
5716 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5717 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 5718out:
5719 dprintk("<-- %s\n", __func__);
5720 return status;
5721}
5722
0f3e66c6
AA		 5723/*
5724 * Issue the over-the-wire RPC DESTROY_SESSION.
5725 * The caller must serialize access to this routine.
5726 */
848f5bda
TM		 5727int nfs4_proc_destroy_session(struct nfs4_session *session,
5728 struct rpc_cred *cred)
0f3e66c6 5729{
848f5bda
TM		 5730 struct rpc_message msg = {
5731 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
5732 .rpc_argp = session,
5733 .rpc_cred = cred,
5734 };
0f3e66c6 5735 int status = 0;
0f3e66c6
AA		 5736
5737 dprintk("--> nfs4_proc_destroy_session\n");
5738
5739 /* session is still being setup */
5740 if (session->clp->cl_cons_state != NFS_CS_READY)
5741 return status;
5742
1bd714f2 5743 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
0f3e66c6
AA		 5744
5745 if (status)
08106ac7 5746 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 5747 "Session has been destroyed regardless...\n", status);
5748
5749 dprintk("<-- nfs4_proc_destroy_session\n");
5750 return status;
5751}
5752
fc01cea9
AA		 5753/*
5754 * Renew the cl_session lease.
5755 */
d5f8d3fe
TM		 5756struct nfs4_sequence_data {
5757 struct nfs_client *clp;
5758 struct nfs4_sequence_args args;
5759 struct nfs4_sequence_res res;
5760};
5761
dc96aef9
AB		 5762static void nfs41_sequence_release(void *data)
5763{
d5f8d3fe
TM		 5764 struct nfs4_sequence_data *calldata = data;
5765 struct nfs_client *clp = calldata->clp;
dc96aef9 5766
7135840f
AB		 5767 if (atomic_read(&clp->cl_count) > 1)
5768 nfs4_schedule_state_renewal(clp);
5769 nfs_put_client(clp);
d5f8d3fe 5770 kfree(calldata);
dc96aef9
AB		 5771}
5772
aa5190d0
TM		 5773static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5774{
5775 switch(task->tk_status) {
5776 case -NFS4ERR_DELAY:
aa5190d0
TM		 5777 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5778 return -EAGAIN;
5779 default:
0400a6b0 5780 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 5781 }
5782 return 0;
5783}
5784
dc96aef9 5785static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 5786{
d5f8d3fe
TM		 5787 struct nfs4_sequence_data *calldata = data;
5788 struct nfs_client *clp = calldata->clp;
fc01cea9 5789
14516c3a
TM		 5790 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5791 return;
fc01cea9
AA		 5792
5793 if (task->tk_status < 0) {
5794 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 5795 if (atomic_read(&clp->cl_count) == 1)
5796 goto out;
fc01cea9 5797
aa5190d0
TM		 5798 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5799 rpc_restart_call_prepare(task);
fc01cea9
AA		 5800 return;
5801 }
5802 }
fc01cea9 5803 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 5804out:
fc01cea9
AA		 5805 dprintk("<-- %s\n", __func__);
5806}
5807
5808static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5809{
d5f8d3fe
TM		 5810 struct nfs4_sequence_data *calldata = data;
5811 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 5812 struct nfs4_sequence_args *args;
5813 struct nfs4_sequence_res *res;
5814
fc01cea9
AA		 5815 args = task->tk_msg.rpc_argp;
5816 res = task->tk_msg.rpc_resp;
5817
d9afbd1b 5818 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 5819}
5820
5821static const struct rpc_call_ops nfs41_sequence_ops = {
5822 .rpc_call_done = nfs41_sequence_call_done,
5823 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 5824 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 5825};
5826
8fe72bac
TM		 5827static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
5828 struct rpc_cred *cred,
5829 bool is_privileged)
fc01cea9 5830{
d5f8d3fe 5831 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 5832 struct rpc_message msg = {
5833 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5834 .rpc_cred = cred,
5835 };
71ac6da9
TM		 5836 struct rpc_task_setup task_setup_data = {
5837 .rpc_client = clp->cl_rpcclient,
5838 .rpc_message = &msg,
8fe72bac 5839 .callback_ops = &nfs41_sequence_ops,
71ac6da9
TM		 5840 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
5841 };
fc01cea9 5842
7135840f 5843 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 5844 return ERR_PTR(-EIO);
dfb4f309 5845 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 5846 if (calldata == NULL) {
7135840f 5847 nfs_put_client(clp);
71ac6da9 5848 return ERR_PTR(-ENOMEM);
fc01cea9 5849 }
9d12b216 5850 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 5851 if (is_privileged)
5852 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 5853 msg.rpc_argp = &calldata->args;
5854 msg.rpc_resp = &calldata->res;
5855 calldata->clp = clp;
71ac6da9 5856 task_setup_data.callback_data = calldata;
fc01cea9 5857
71ac6da9
TM		 5858 return rpc_run_task(&task_setup_data);
5859}
5860
2f60ea6b 5861static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 5862{
5863 struct rpc_task *task;
5864 int ret = 0;
5865
2f60ea6b
TM		 5866 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
5867 return 0;
8fe72bac 5868 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 5869 if (IS_ERR(task))
5870 ret = PTR_ERR(task);
5871 else
bf294b41 5872 rpc_put_task_async(task);
71ac6da9
TM		 5873 dprintk("<-- %s status=%d\n", __func__, ret);
5874 return ret;
5875}
5876
5877static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5878{
5879 struct rpc_task *task;
5880 int ret;
5881
8fe72bac 5882 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 5883 if (IS_ERR(task)) {
5884 ret = PTR_ERR(task);
5885 goto out;
5886 }
5887 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 5888 if (!ret) {
5889 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
5890
5891 if (task->tk_status == 0)
5892 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 5893 ret = task->tk_status;
b4410c2f 5894 }
71ac6da9
TM		 5895 rpc_put_task(task);
5896out:
5897 dprintk("<-- %s status=%d\n", __func__, ret);
5898 return ret;
fc01cea9
AA		 5899}
5900
fce5c838
RL		 5901struct nfs4_reclaim_complete_data {
5902 struct nfs_client *clp;
5903 struct nfs41_reclaim_complete_args arg;
5904 struct nfs41_reclaim_complete_res res;
5905};
5906
5907static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
5908{
5909 struct nfs4_reclaim_complete_data *calldata = data;
5910
d9afbd1b
TM		 5911 nfs41_setup_sequence(calldata->clp->cl_session,
5912 &calldata->arg.seq_args,
5913 &calldata->res.seq_res,
5914 task);
fce5c838
RL		 5915}
5916
aa5190d0
TM		 5917static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5918{
5919 switch(task->tk_status) {
5920 case 0:
5921 case -NFS4ERR_COMPLETE_ALREADY:
5922 case -NFS4ERR_WRONG_CRED: /* What to do here? */
5923 break;
5924 case -NFS4ERR_DELAY:
aa5190d0 5925 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 5926 /* fall through */
5927 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 5928 return -EAGAIN;
5929 default:
0400a6b0 5930 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 5931 }
5932 return 0;
5933}
5934
fce5c838
RL		 5935static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
5936{
5937 struct nfs4_reclaim_complete_data *calldata = data;
5938 struct nfs_client *clp = calldata->clp;
5939 struct nfs4_sequence_res *res = &calldata->res.seq_res;
5940
5941 dprintk("--> %s\n", __func__);
14516c3a
TM		 5942 if (!nfs41_sequence_done(task, res))
5943 return;
fce5c838 5944
aa5190d0
TM		 5945 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
5946 rpc_restart_call_prepare(task);
5947 return;
5948 }
fce5c838
RL		 5949 dprintk("<-- %s\n", __func__);
5950}
5951
5952static void nfs4_free_reclaim_complete_data(void *data)
5953{
5954 struct nfs4_reclaim_complete_data *calldata = data;
5955
5956 kfree(calldata);
5957}
5958
5959static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
5960 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
5961 .rpc_call_done = nfs4_reclaim_complete_done,
5962 .rpc_release = nfs4_free_reclaim_complete_data,
5963};
5964
5965/*
5966 * Issue a global reclaim complete.
5967 */
5968static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
5969{
5970 struct nfs4_reclaim_complete_data *calldata;
5971 struct rpc_task *task;
5972 struct rpc_message msg = {
5973 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5974 };
5975 struct rpc_task_setup task_setup_data = {
5976 .rpc_client = clp->cl_rpcclient,
5977 .rpc_message = &msg,
5978 .callback_ops = &nfs4_reclaim_complete_call_ops,
5979 .flags = RPC_TASK_ASYNC,
5980 };
5981 int status = -ENOMEM;
5982
5983 dprintk("--> %s\n", __func__);
8535b2be 5984 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 5985 if (calldata == NULL)
5986 goto out;
5987 calldata->clp = clp;
5988 calldata->arg.one_fs = 0;
fce5c838 5989
9d12b216 5990 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 5991 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 5992 msg.rpc_argp = &calldata->arg;
5993 msg.rpc_resp = &calldata->res;
5994 task_setup_data.callback_data = calldata;
5995 task = rpc_run_task(&task_setup_data);
acf82b85 5996 if (IS_ERR(task)) {
fce5c838 5997 status = PTR_ERR(task);
acf82b85
DC		 5998 goto out;
5999 }
c34c32ea
AA		 6000 status = nfs4_wait_for_completion_rpc_task(task);
6001 if (status == 0)
6002 status = task->tk_status;
fce5c838 6003 rpc_put_task(task);
acf82b85 6004 return 0;
fce5c838
RL		 6005out:
6006 dprintk("<-- %s status=%d\n", __func__, status);
6007 return status;
6008}
b1f69b75
AA		 6009
6010static void
6011nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
6012{
6013 struct nfs4_layoutget *lgp = calldata;
c31663d4 6014 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 6015 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 6016
6017 dprintk("--> %s\n", __func__);
c31663d4
FI		 6018 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
6019 * right now covering the LAYOUTGET we are about to send.
6020 * However, that is not so catastrophic, and there seems
6021 * to be no way to prevent it completely.
6022 */
6ba7db34 6023 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 6024 &lgp->res.seq_res, task))
b1f69b75 6025 return;
cf7d63f1
FI		 6026 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
6027 NFS_I(lgp->args.inode)->layout,
6028 lgp->args.ctx->state)) {
6029 rpc_exit(task, NFS4_OK);
cf7d63f1 6030 }
b1f69b75
AA		 6031}
6032
6033static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
6034{
6035 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 6036 struct inode *inode = lgp->args.inode;
6037 struct nfs_server *server = NFS_SERVER(inode);
6038 struct pnfs_layout_hdr *lo;
6039 struct nfs4_state *state = NULL;
b1f69b75
AA		 6040
6041 dprintk("--> %s\n", __func__);
6042
6ba7db34 6043 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 6044 goto out;
b1f69b75
AA		 6045
6046 switch (task->tk_status) {
6047 case 0:
ee314c2a 6048 goto out;
b1f69b75
AA		 6049 case -NFS4ERR_LAYOUTTRYLATER:
6050 case -NFS4ERR_RECALLCONFLICT:
6051 task->tk_status = -NFS4ERR_DELAY;
ee314c2a
TM		 6052 break;
6053 case -NFS4ERR_EXPIRED:
6054 case -NFS4ERR_BAD_STATEID:
6055 spin_lock(&inode->i_lock);
6056 lo = NFS_I(inode)->layout;
6057 if (!lo || list_empty(&lo->plh_segs)) {
6058 spin_unlock(&inode->i_lock);
6059 /* If the open stateid was bad, then recover it. */
6060 state = lgp->args.ctx->state;
6061 } else {
6062 LIST_HEAD(head);
6063
6064 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
6065 spin_unlock(&inode->i_lock);
6066 /* Mark the bad layout state as invalid, then
6067 * retry using the open stateid. */
6068 pnfs_free_lseg_list(&head);
b1f69b75
AA		 6069 }
6070 }
ee314c2a
TM		 6071 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
6072 rpc_restart_call_prepare(task);
6073out:
b1f69b75
AA		 6074 dprintk("<-- %s\n", __func__);
6075}
6076
8554116e
IK		 6077static size_t max_response_pages(struct nfs_server *server)
6078{
6079 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
6080 return nfs_page_array_len(0, max_resp_sz);
6081}
6082
6083static void nfs4_free_pages(struct page **pages, size_t size)
6084{
6085 int i;
6086
6087 if (!pages)
6088 return;
6089
6090 for (i = 0; i < size; i++) {
6091 if (!pages[i])
6092 break;
6093 __free_page(pages[i]);
6094 }
6095 kfree(pages);
6096}
6097
6098static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
6099{
6100 struct page **pages;
6101 int i;
6102
6103 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
6104 if (!pages) {
6105 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
6106 return NULL;
6107 }
6108
6109 for (i = 0; i < size; i++) {
6110 pages[i] = alloc_page(gfp_flags);
6111 if (!pages[i]) {
6112 dprintk("%s: failed to allocate page\n", __func__);
6113 nfs4_free_pages(pages, size);
6114 return NULL;
6115 }
6116 }
6117
6118 return pages;
6119}
6120
b1f69b75
AA		 6121static void nfs4_layoutget_release(void *calldata)
6122{
6123 struct nfs4_layoutget *lgp = calldata;
8554116e
IK		 6124 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6125 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6126
6127 dprintk("--> %s\n", __func__);
8554116e 6128 nfs4_free_pages(lgp->args.layout.pages, max_pages);
b1f69b75
AA		 6129 put_nfs_open_context(lgp->args.ctx);
6130 kfree(calldata);
6131 dprintk("<-- %s\n", __func__);
6132}
6133
6134static const struct rpc_call_ops nfs4_layoutget_call_ops = {
6135 .rpc_call_prepare = nfs4_layoutget_prepare,
6136 .rpc_call_done = nfs4_layoutget_done,
6137 .rpc_release = nfs4_layoutget_release,
6138};
6139
a0b0a6e3
TM		 6140struct pnfs_layout_segment *
6141nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75
AA		 6142{
6143 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
8554116e 6144 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6145 struct rpc_task *task;
6146 struct rpc_message msg = {
6147 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
6148 .rpc_argp = &lgp->args,
6149 .rpc_resp = &lgp->res,
6150 };
6151 struct rpc_task_setup task_setup_data = {
6152 .rpc_client = server->client,
6153 .rpc_message = &msg,
6154 .callback_ops = &nfs4_layoutget_call_ops,
6155 .callback_data = lgp,
6156 .flags = RPC_TASK_ASYNC,
6157 };
a0b0a6e3 6158 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 6159 int status = 0;
6160
6161 dprintk("--> %s\n", __func__);
6162
8554116e
IK		 6163 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
6164 if (!lgp->args.layout.pages) {
6165 nfs4_layoutget_release(lgp);
a0b0a6e3 6166 return ERR_PTR(-ENOMEM);
8554116e
IK		 6167 }
6168 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
6169
35124a09 6170 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 6171 lgp->res.seq_res.sr_slot = NULL;
9d12b216 6172 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
b1f69b75
AA		 6173 task = rpc_run_task(&task_setup_data);
6174 if (IS_ERR(task))
a0b0a6e3 6175 return ERR_CAST(task);
b1f69b75 6176 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 6177 if (status == 0)
6178 status = task->tk_status;
6179 if (status == 0)
a0b0a6e3 6180 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 6181 rpc_put_task(task);
6182 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 6183 if (status)
6184 return ERR_PTR(status);
6185 return lseg;
b1f69b75
AA		 6186}
6187
cbe82603
BH		 6188static void
6189nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
6190{
6191 struct nfs4_layoutreturn *lrp = calldata;
6192
6193 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 6194 nfs41_setup_sequence(lrp->clp->cl_session,
6195 &lrp->args.seq_args,
6196 &lrp->res.seq_res,
6197 task);
cbe82603
BH		 6198}
6199
6200static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
6201{
6202 struct nfs4_layoutreturn *lrp = calldata;
6203 struct nfs_server *server;
6204
6205 dprintk("--> %s\n", __func__);
6206
6ba7db34 6207 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 6208 return;
6209
6210 server = NFS_SERVER(lrp->args.inode);
6211 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
d00c5d43 6212 rpc_restart_call_prepare(task);
cbe82603
BH		 6213 return;
6214 }
cbe82603
BH		 6215 dprintk("<-- %s\n", __func__);
6216}
6217
6218static void nfs4_layoutreturn_release(void *calldata)
6219{
6220 struct nfs4_layoutreturn *lrp = calldata;
849b286f 6221 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 6222
6223 dprintk("--> %s\n", __func__);
849b286f
TM		 6224 spin_lock(&lo->plh_inode->i_lock);
6225 if (lrp->res.lrs_present)
6226 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
6227 lo->plh_block_lgets--;
6228 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 6229 pnfs_put_layout_hdr(lrp->args.layout);
cbe82603
BH		 6230 kfree(calldata);
6231 dprintk("<-- %s\n", __func__);
6232}
6233
6234static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
6235 .rpc_call_prepare = nfs4_layoutreturn_prepare,
6236 .rpc_call_done = nfs4_layoutreturn_done,
6237 .rpc_release = nfs4_layoutreturn_release,
6238};
6239
6240int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
6241{
6242 struct rpc_task *task;
6243 struct rpc_message msg = {
6244 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
6245 .rpc_argp = &lrp->args,
6246 .rpc_resp = &lrp->res,
6247 };
6248 struct rpc_task_setup task_setup_data = {
6249 .rpc_client = lrp->clp->cl_rpcclient,
6250 .rpc_message = &msg,
6251 .callback_ops = &nfs4_layoutreturn_call_ops,
6252 .callback_data = lrp,
6253 };
6254 int status;
6255
6256 dprintk("--> %s\n", __func__);
9d12b216 6257 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 6258 task = rpc_run_task(&task_setup_data);
6259 if (IS_ERR(task))
6260 return PTR_ERR(task);
6261 status = task->tk_status;
6262 dprintk("<-- %s status=%d\n", __func__, status);
6263 rpc_put_task(task);
6264 return status;
6265}
6266
7f11d8d3
AA		 6267/*
6268 * Retrieve the list of Data Server devices from the MDS.
6269 */
6270static int _nfs4_getdevicelist(struct nfs_server *server,
6271 const struct nfs_fh *fh,
6272 struct pnfs_devicelist *devlist)
6273{
6274 struct nfs4_getdevicelist_args args = {
6275 .fh = fh,
6276 .layoutclass = server->pnfs_curr_ld->id,
6277 };
6278 struct nfs4_getdevicelist_res res = {
6279 .devlist = devlist,
6280 };
6281 struct rpc_message msg = {
6282 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
6283 .rpc_argp = &args,
6284 .rpc_resp = &res,
6285 };
6286 int status;
6287
6288 dprintk("--> %s\n", __func__);
6289 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6290 &res.seq_res, 0);
6291 dprintk("<-- %s status=%d\n", __func__, status);
6292 return status;
6293}
6294
6295int nfs4_proc_getdevicelist(struct nfs_server *server,
6296 const struct nfs_fh *fh,
6297 struct pnfs_devicelist *devlist)
6298{
6299 struct nfs4_exception exception = { };
6300 int err;
6301
6302 do {
6303 err = nfs4_handle_exception(server,
6304 _nfs4_getdevicelist(server, fh, devlist),
6305 &exception);
6306 } while (exception.retry);
6307
6308 dprintk("%s: err=%d, num_devs=%u\n", __func__,
6309 err, devlist->num_devs);
6310
6311 return err;
6312}
6313EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
6314
b1f69b75
AA		 6315static int
6316_nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6317{
6318 struct nfs4_getdeviceinfo_args args = {
6319 .pdev = pdev,
6320 };
6321 struct nfs4_getdeviceinfo_res res = {
6322 .pdev = pdev,
6323 };
6324 struct rpc_message msg = {
6325 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6326 .rpc_argp = &args,
6327 .rpc_resp = &res,
6328 };
6329 int status;
6330
6331 dprintk("--> %s\n", __func__);
7c513058 6332 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 6333 dprintk("<-- %s status=%d\n", __func__, status);
6334
6335 return status;
6336}
6337
6338int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6339{
6340 struct nfs4_exception exception = { };
6341 int err;
6342
6343 do {
6344 err = nfs4_handle_exception(server,
6345 _nfs4_proc_getdeviceinfo(server, pdev),
6346 &exception);
6347 } while (exception.retry);
6348 return err;
6349}
6350EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6351
863a3c6c
AA		 6352static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6353{
6354 struct nfs4_layoutcommit_data *data = calldata;
6355 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 6356 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 6357
d9afbd1b
TM		 6358 nfs41_setup_sequence(session,
6359 &data->args.seq_args,
6360 &data->res.seq_res,
6361 task);
863a3c6c
AA		 6362}
6363
6364static void
6365nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6366{
6367 struct nfs4_layoutcommit_data *data = calldata;
6368 struct nfs_server *server = NFS_SERVER(data->args.inode);
6369
6ba7db34 6370 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 6371 return;
6372
6373 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 6374 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6375 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6376 case -NFS4ERR_BADLAYOUT: /* no layout */
6377 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 6378 task->tk_status = 0;
e59d27e0
TM		 6379 break;
6380 case 0:
863a3c6c
AA		 6381 nfs_post_op_update_inode_force_wcc(data->args.inode,
6382 data->res.fattr);
e59d27e0
TM		 6383 break;
6384 default:
6385 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6386 rpc_restart_call_prepare(task);
6387 return;
6388 }
6389 }
863a3c6c
AA		 6390}
6391
6392static void nfs4_layoutcommit_release(void *calldata)
6393{
6394 struct nfs4_layoutcommit_data *data = calldata;
a9bae566 6395 struct pnfs_layout_segment *lseg, *tmp;
92407e75 6396 unsigned long *bitlock = &NFS_I(data->args.inode)->flags;
863a3c6c 6397
db29c089 6398 pnfs_cleanup_layoutcommit(data);
863a3c6c 6399 /* Matched by references in pnfs_set_layoutcommit */
a9bae566
PT		 6400 list_for_each_entry_safe(lseg, tmp, &data->lseg_list, pls_lc_list) {
6401 list_del_init(&lseg->pls_lc_list);
6402 if (test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT,
6403 &lseg->pls_flags))
9369a431 6404 pnfs_put_lseg(lseg);
a9bae566 6405 }
92407e75
PT		 6406
6407 clear_bit_unlock(NFS_INO_LAYOUTCOMMITTING, bitlock);
6408 smp_mb__after_clear_bit();
6409 wake_up_bit(bitlock, NFS_INO_LAYOUTCOMMITTING);
6410
863a3c6c
AA		 6411 put_rpccred(data->cred);
6412 kfree(data);
6413}
6414
6415static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6416 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6417 .rpc_call_done = nfs4_layoutcommit_done,
6418 .rpc_release = nfs4_layoutcommit_release,
6419};
6420
6421int
ef311537 6422nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 6423{
6424 struct rpc_message msg = {
6425 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6426 .rpc_argp = &data->args,
6427 .rpc_resp = &data->res,
6428 .rpc_cred = data->cred,
6429 };
6430 struct rpc_task_setup task_setup_data = {
6431 .task = &data->task,
6432 .rpc_client = NFS_CLIENT(data->args.inode),
6433 .rpc_message = &msg,
6434 .callback_ops = &nfs4_layoutcommit_ops,
6435 .callback_data = data,
6436 .flags = RPC_TASK_ASYNC,
6437 };
6438 struct rpc_task *task;
6439 int status = 0;
6440
6441 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6442 "lbw: %llu inode %lu\n",
6443 data->task.tk_pid, sync,
6444 data->args.lastbytewritten,
6445 data->args.inode->i_ino);
6446
9d12b216 6447 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 6448 task = rpc_run_task(&task_setup_data);
6449 if (IS_ERR(task))
6450 return PTR_ERR(task);
ef311537 6451 if (sync == false)
863a3c6c
AA		 6452 goto out;
6453 status = nfs4_wait_for_completion_rpc_task(task);
6454 if (status != 0)
6455 goto out;
6456 status = task->tk_status;
6457out:
6458 dprintk("%s: status %d\n", __func__, status);
6459 rpc_put_task(task);
6460 return status;
6461}
fca78d6d
BS		 6462
6463static int
6464_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6465 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6466{
6467 struct nfs41_secinfo_no_name_args args = {
6468 .style = SECINFO_STYLE_CURRENT_FH,
6469 };
6470 struct nfs4_secinfo_res res = {
6471 .flavors = flavors,
6472 };
6473 struct rpc_message msg = {
6474 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6475 .rpc_argp = &args,
6476 .rpc_resp = &res,
6477 };
6478 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6479}
6480
6481static int
6482nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6483 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6484{
6485 struct nfs4_exception exception = { };
6486 int err;
6487 do {
6488 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6489 switch (err) {
6490 case 0:
6491 case -NFS4ERR_WRONGSEC:
6492 case -NFS4ERR_NOTSUPP:
05e9cfb4 6493 goto out;
fca78d6d
BS		 6494 default:
6495 err = nfs4_handle_exception(server, err, &exception);
6496 }
6497 } while (exception.retry);
05e9cfb4 6498out:
fca78d6d
BS		 6499 return err;
6500}
6501
6502static int
6503nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6504 struct nfs_fsinfo *info)
6505{
6506 int err;
6507 struct page *page;
6508 rpc_authflavor_t flavor;
6509 struct nfs4_secinfo_flavors *flavors;
6510
6511 page = alloc_page(GFP_KERNEL);
6512 if (!page) {
6513 err = -ENOMEM;
6514 goto out;
6515 }
6516
6517 flavors = page_address(page);
6518 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6519
6520 /*
6521 * Fall back on "guess and check" method if
6522 * the server doesn't support SECINFO_NO_NAME
6523 */
6524 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
6525 err = nfs4_find_root_sec(server, fhandle, info);
6526 goto out_freepage;
6527 }
6528 if (err)
6529 goto out_freepage;
6530
6531 flavor = nfs_find_best_sec(flavors);
6532 if (err == 0)
6533 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6534
6535out_freepage:
6536 put_page(page);
6537 if (err == -EACCES)
6538 return -EPERM;
6539out:
6540 return err;
6541}
1cab0652
BS		 6542
6543static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6544{
6545 int status;
6546 struct nfs41_test_stateid_args args = {
1cab0652 6547 .stateid = stateid,
7d974794
BS		 6548 };
6549 struct nfs41_test_stateid_res res;
6550 struct rpc_message msg = {
6551 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6552 .rpc_argp = &args,
6553 .rpc_resp = &res,
6554 };
1cab0652 6555
38527b15 6556 dprintk("NFS call test_stateid %p\n", stateid);
9d12b216 6557 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac
TM		 6558 nfs4_set_sequence_privileged(&args.seq_args);
6559 status = nfs4_call_sync_sequence(server->client, server, &msg,
6560 &args.seq_args, &res.seq_res);
38527b15
CL		 6561 if (status != NFS_OK) {
6562 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 6563 return status;
38527b15
CL		 6564 }
6565 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 6566 return -res.status;
7d974794
BS		 6567}
6568
38527b15
CL		 6569/**
6570 * nfs41_test_stateid - perform a TEST_STATEID operation
6571 *
6572 * @server: server / transport on which to perform the operation
6573 * @stateid: state ID to test
6574 *
6575 * Returns NFS_OK if the server recognizes that "stateid" is valid.
6576 * Otherwise a negative NFS4ERR value is returned if the operation
6577 * failed or the state ID is not currently valid.
6578 */
1cab0652 6579static int nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6580{
6581 struct nfs4_exception exception = { };
6582 int err;
6583 do {
377e507d
CL		 6584 err = _nfs41_test_stateid(server, stateid);
6585 if (err != -NFS4ERR_DELAY)
6586 break;
6587 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 6588 } while (exception.retry);
6589 return err;
6590}
9aeda35f 6591
1cab0652 6592static int _nfs4_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f 6593{
9aeda35f 6594 struct nfs41_free_stateid_args args = {
1cab0652 6595 .stateid = stateid,
9aeda35f
BS		 6596 };
6597 struct nfs41_free_stateid_res res;
6598 struct rpc_message msg = {
6599 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
6600 .rpc_argp = &args,
6601 .rpc_resp = &res,
6602 };
38527b15 6603 int status;
9aeda35f 6604
38527b15 6605 dprintk("NFS call free_stateid %p\n", stateid);
9d12b216 6606 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 6607 nfs4_set_sequence_privileged(&args.seq_args);
38527b15 6608 status = nfs4_call_sync_sequence(server->client, server, &msg,
8fe72bac 6609 &args.seq_args, &res.seq_res);
38527b15
CL		 6610 dprintk("NFS reply free_stateid: %d\n", status);
6611 return status;
9aeda35f
BS		 6612}
6613
38527b15
CL		 6614/**
6615 * nfs41_free_stateid - perform a FREE_STATEID operation
6616 *
6617 * @server: server / transport on which to perform the operation
6618 * @stateid: state ID to release
6619 *
6620 * Returns NFS_OK if the server freed "stateid". Otherwise a
6621 * negative NFS4ERR value is returned.
6622 */
1cab0652 6623static int nfs41_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f
BS		 6624{
6625 struct nfs4_exception exception = { };
6626 int err;
6627 do {
377e507d
CL		 6628 err = _nfs4_free_stateid(server, stateid);
6629 if (err != -NFS4ERR_DELAY)
6630 break;
6631 nfs4_handle_exception(server, err, &exception);
9aeda35f
BS		 6632 } while (exception.retry);
6633 return err;
6634}
36281caa
TM		 6635
6636static bool nfs41_match_stateid(const nfs4_stateid *s1,
6637 const nfs4_stateid *s2)
6638{
2d2f24ad 6639 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 6640 return false;
6641
2d2f24ad 6642 if (s1->seqid == s2->seqid)
36281caa 6643 return true;
2d2f24ad 6644 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 6645 return true;
6646
6647 return false;
6648}
6649
557134a3
AA		 6650#endif /* CONFIG_NFS_V4_1 */
6651
36281caa
TM		 6652static bool nfs4_match_stateid(const nfs4_stateid *s1,
6653 const nfs4_stateid *s2)
6654{
f597c537 6655 return nfs4_stateid_match(s1, s2);
36281caa
TM		 6656}
6657
6658
17280175 6659static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 6660 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 6661 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 6662 .recover_open = nfs4_open_reclaim,
6663 .recover_lock = nfs4_lock_reclaim,
591d71cb 6664 .establish_clid = nfs4_init_clientid,
90a16617 6665 .get_clid_cred = nfs4_get_setclientid_cred,
05f4c350 6666 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 6667};
6668
591d71cb 6669#if defined(CONFIG_NFS_V4_1)
17280175 6670static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 6671 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6672 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6673 .recover_open = nfs4_open_reclaim,
6674 .recover_lock = nfs4_lock_reclaim,
4d643d1d 6675 .establish_clid = nfs41_init_clientid,
b4b82607 6676 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 6677 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 6678 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 6679};
6680#endif /* CONFIG_NFS_V4_1 */
6681
17280175 6682static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 6683 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6684 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6685 .recover_open = nfs4_open_expired,
6686 .recover_lock = nfs4_lock_expired,
6687 .establish_clid = nfs4_init_clientid,
90a16617 6688 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 6689};
6690
6691#if defined(CONFIG_NFS_V4_1)
17280175 6692static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 6693 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 6694 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 6695 .recover_open = nfs41_open_expired,
6696 .recover_lock = nfs41_lock_expired,
4d643d1d 6697 .establish_clid = nfs41_init_clientid,
b4b82607 6698 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 6699};
591d71cb 6700#endif /* CONFIG_NFS_V4_1 */
1da177e4 6701
17280175 6702static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 6703 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 6704 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 6705 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 6706};
6707
6708#if defined(CONFIG_NFS_V4_1)
17280175 6709static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 6710 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 6711 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 6712 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 6713};
6714#endif
6715
97dc1359
TM		 6716static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
6717 .minor_version = 0,
6718 .call_sync = _nfs4_call_sync,
36281caa 6719 .match_stateid = nfs4_match_stateid,
fca78d6d 6720 .find_root_sec = nfs4_find_root_sec,
c48f4f35
TM		 6721 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
6722 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
6723 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 6724};
6725
6726#if defined(CONFIG_NFS_V4_1)
6727static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
6728 .minor_version = 1,
104287cd 6729 .call_sync = nfs4_call_sync_sequence,
36281caa 6730 .match_stateid = nfs41_match_stateid,
fca78d6d 6731 .find_root_sec = nfs41_find_root_sec,
c48f4f35
TM		 6732 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
6733 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
6734 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 6735};
6736#endif
6737
97dc1359
TM		 6738const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
6739 [0] = &nfs_v4_0_minor_ops,
6740#if defined(CONFIG_NFS_V4_1)
6741 [1] = &nfs_v4_1_minor_ops,
6742#endif
6743};
6744
73a79706
BS		 6745const struct inode_operations nfs4_dir_inode_operations = {
6746 .create = nfs_create,
6747 .lookup = nfs_lookup,
6748 .atomic_open = nfs_atomic_open,
6749 .link = nfs_link,
6750 .unlink = nfs_unlink,
6751 .symlink = nfs_symlink,
6752 .mkdir = nfs_mkdir,
6753 .rmdir = nfs_rmdir,
6754 .mknod = nfs_mknod,
6755 .rename = nfs_rename,
6756 .permission = nfs_permission,
6757 .getattr = nfs_getattr,
6758 .setattr = nfs_setattr,
6759 .getxattr = generic_getxattr,
6760 .setxattr = generic_setxattr,
6761 .listxattr = generic_listxattr,
6762 .removexattr = generic_removexattr,
6763};
6764
92e1d5be 6765static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 6766 .permission = nfs_permission,
6767 .getattr = nfs_getattr,
6768 .setattr = nfs_setattr,
64c2ce8b
AK		 6769 .getxattr = generic_getxattr,
6770 .setxattr = generic_setxattr,
6771 .listxattr = generic_listxattr,
6772 .removexattr = generic_removexattr,
6b3b5496
BF		 6773};
6774
509de811 6775const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 6776 .version = 4, /* protocol version */
6777 .dentry_ops = &nfs4_dentry_operations,
6778 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 6779 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 6780 .file_ops = &nfs4_file_operations,
1da177e4 6781 .getroot = nfs4_proc_get_root,
281cad46 6782 .submount = nfs4_submount,
ff9099f2 6783 .try_mount = nfs4_try_mount,
1da177e4
LT		 6784 .getattr = nfs4_proc_getattr,
6785 .setattr = nfs4_proc_setattr,
6786 .lookup = nfs4_proc_lookup,
6787 .access = nfs4_proc_access,
6788 .readlink = nfs4_proc_readlink,
1da177e4
LT		 6789 .create = nfs4_proc_create,
6790 .remove = nfs4_proc_remove,
6791 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 6792 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4
LT		 6793 .unlink_done = nfs4_proc_unlink_done,
6794 .rename = nfs4_proc_rename,
d3d4152a 6795 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 6796 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 6797 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 6798 .link = nfs4_proc_link,
6799 .symlink = nfs4_proc_symlink,
6800 .mkdir = nfs4_proc_mkdir,
6801 .rmdir = nfs4_proc_remove,
6802 .readdir = nfs4_proc_readdir,
6803 .mknod = nfs4_proc_mknod,
6804 .statfs = nfs4_proc_statfs,
6805 .fsinfo = nfs4_proc_fsinfo,
6806 .pathconf = nfs4_proc_pathconf,
e9326dca 6807 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 6808 .decode_dirent = nfs4_decode_dirent,
6809 .read_setup = nfs4_proc_read_setup,
1abb5088 6810 .read_pageio_init = pnfs_pageio_init_read,
ea7c3303 6811 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
ec06c096 6812 .read_done = nfs4_read_done,
1da177e4 6813 .write_setup = nfs4_proc_write_setup,
57208fa7 6814 .write_pageio_init = pnfs_pageio_init_write,
c6cb80d0 6815 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
788e7a89 6816 .write_done = nfs4_write_done,
1da177e4 6817 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 6818 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 6819 .commit_done = nfs4_commit_done,
1da177e4 6820 .lock = nfs4_proc_lock,
e50a1c2e 6821 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 6822 .close_context = nfs4_close_context,
2b484297 6823 .open_context = nfs4_atomic_open,
011e2a7f 6824 .have_delegation = nfs4_have_delegation,
57ec14c5 6825 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 6826 .alloc_client = nfs4_alloc_client,
45a52a02 6827 .init_client = nfs4_init_client,
cdb7eced 6828 .free_client = nfs4_free_client,
1179acc6
BS		 6829 .create_server = nfs4_create_server,
6830 .clone_server = nfs_clone_server,
1da177e4
LT		 6831};
6832
64c2ce8b
AK		 6833static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
6834 .prefix = XATTR_NAME_NFSV4_ACL,
6835 .list = nfs4_xattr_list_nfs4_acl,
6836 .get = nfs4_xattr_get_nfs4_acl,
6837 .set = nfs4_xattr_set_nfs4_acl,
6838};
6839
6840const struct xattr_handler *nfs4_xattr_handlers[] = {
6841 &nfs4_xattr_nfs4_acl_handler,
6842 NULL
6843};
6844
1da177e4
LT		 6845/*
6846 * Local variables:
6847 * c-basic-offset: 8
6848 * End:
6849 */
Linux 6.x block layer and io_uring tree(s)