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[mirror_ubuntu-bionic-kernel.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>
64c2ce8b 54#include <linux/xattr.h>
c7a360b0 55#include <linux/utsname.h>
d310310c 56#include <linux/freezer.h>
1da177e4 57
4ce79717 58#include "nfs4_fs.h"
1da177e4 59#include "delegation.h"
101070ca 60#include "internal.h"
006ea73e 61#include "iostat.h"
fc931582 62#include "callback.h"
b1f69b75 63#include "pnfs.h"
f092075d 64#include "netns.h"
40c64c26 65#include "nfs4idmap.h"
73e39aaa 66#include "nfs4session.h"
de242c0b 67#include "fscache.h"
1da177e4 68
c6d01c6f
TM		 69#include "nfs4trace.h"
70
1da177e4
LT		 71#define NFSDBG_FACILITY NFSDBG_PROC
72
2066fe89 73#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 74#define NFS4_POLL_RETRY_MAX (15*HZ)
75
a1d1c4f1
TM		 76/* file attributes which can be mapped to nfs attributes */
77#define NFS4_VALID_ATTRS (ATTR_MODE \
78 | ATTR_UID \
79 | ATTR_GID \
80 | ATTR_SIZE \
81 | ATTR_ATIME \
82 | ATTR_MTIME \
83 | ATTR_CTIME \
84 | ATTR_ATIME_SET \
85 | ATTR_MTIME_SET)
86
cdd4e68b 87struct nfs4_opendata;
864472e9 88static int _nfs4_proc_open(struct nfs4_opendata *data);
b257957e 89static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 90static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
81934ddb 91static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
1775fd3e
DQ		 92static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, struct nfs4_label *label);
93static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label);
0ab64e0e
TM		 94static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
95 struct nfs_fattr *fattr, struct iattr *sattr,
29b59f94 96 struct nfs_open_context *ctx, struct nfs4_label *ilabel,
1775fd3e 97 struct nfs4_label *olabel);
f062eb6c 98#ifdef CONFIG_NFS_V4_1
ab7cb0df
TM		 99static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *,
100 struct rpc_cred *);
f0b0bf88
TM		 101static int nfs41_free_stateid(struct nfs_server *, const nfs4_stateid *,
102 struct rpc_cred *, bool);
f062eb6c 103#endif
aa9c2669
DQ		 104
105#ifdef CONFIG_NFS_V4_SECURITY_LABEL
106static inline struct nfs4_label *
107nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
108 struct iattr *sattr, struct nfs4_label *label)
109{
110 int err;
111
112 if (label == NULL)
113 return NULL;
114
115 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0)
116 return NULL;
117
aa9c2669
DQ		 118 err = security_dentry_init_security(dentry, sattr->ia_mode,
119 &dentry->d_name, (void **)&label->label, &label->len);
120 if (err == 0)
121 return label;
122
123 return NULL;
124}
125static inline void
126nfs4_label_release_security(struct nfs4_label *label)
127{
128 if (label)
129 security_release_secctx(label->label, label->len);
130}
131static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
132{
133 if (label)
134 return server->attr_bitmask;
135
136 return server->attr_bitmask_nl;
137}
138#else
139static inline struct nfs4_label *
140nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
141 struct iattr *sattr, struct nfs4_label *l)
142{ return NULL; }
143static inline void
144nfs4_label_release_security(struct nfs4_label *label)
145{ return; }
146static inline u32 *
147nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
148{ return server->attr_bitmask; }
149#endif
150
1da177e4 151/* Prevent leaks of NFSv4 errors into userland */
46f72f57 152static int nfs4_map_errors(int err)
1da177e4 153{
52567b03
TM		 154 if (err >= -1000)
155 return err;
156 switch (err) {
157 case -NFS4ERR_RESOURCE:
30005121
WAA		 158 case -NFS4ERR_LAYOUTTRYLATER:
159 case -NFS4ERR_RECALLCONFLICT:
52567b03 160 return -EREMOTEIO;
7ebb9315 161 case -NFS4ERR_WRONGSEC:
8897538e 162 case -NFS4ERR_WRONG_CRED:
7ebb9315 163 return -EPERM;
3ddeb7c5
TM		 164 case -NFS4ERR_BADOWNER:
165 case -NFS4ERR_BADNAME:
166 return -EINVAL;
fb13bfa7
TM		 167 case -NFS4ERR_SHARE_DENIED:
168 return -EACCES;
f25efd85
SD		 169 case -NFS4ERR_MINOR_VERS_MISMATCH:
170 return -EPROTONOSUPPORT;
6e3cf241
TM		 171 case -NFS4ERR_FILE_OPEN:
172 return -EBUSY;
52567b03 173 default:
1da177e4 174 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 175 __func__, -err);
52567b03 176 break;
1da177e4 177 }
52567b03 178 return -EIO;
1da177e4
LT		 179}
180
181/*
182 * This is our standard bitmap for GETATTR requests.
183 */
1549210f 184const u32 nfs4_fattr_bitmap[3] = {
1da177e4
LT		 185 FATTR4_WORD0_TYPE
186 | FATTR4_WORD0_CHANGE
187 | FATTR4_WORD0_SIZE
188 | FATTR4_WORD0_FSID
189 | FATTR4_WORD0_FILEID,
190 FATTR4_WORD1_MODE
191 | FATTR4_WORD1_NUMLINKS
192 | FATTR4_WORD1_OWNER
193 | FATTR4_WORD1_OWNER_GROUP
194 | FATTR4_WORD1_RAWDEV
195 | FATTR4_WORD1_SPACE_USED
196 | FATTR4_WORD1_TIME_ACCESS
197 | FATTR4_WORD1_TIME_METADATA
ea96d1ec
AS		 198 | FATTR4_WORD1_TIME_MODIFY
199 | FATTR4_WORD1_MOUNTED_ON_FILEID,
aa9c2669
DQ		 200#ifdef CONFIG_NFS_V4_SECURITY_LABEL
201 FATTR4_WORD2_SECURITY_LABEL
202#endif
1da177e4
LT		 203};
204
1549210f
TM		 205static const u32 nfs4_pnfs_open_bitmap[3] = {
206 FATTR4_WORD0_TYPE
207 | FATTR4_WORD0_CHANGE
208 | FATTR4_WORD0_SIZE
209 | FATTR4_WORD0_FSID
210 | FATTR4_WORD0_FILEID,
211 FATTR4_WORD1_MODE
212 | FATTR4_WORD1_NUMLINKS
213 | FATTR4_WORD1_OWNER
214 | FATTR4_WORD1_OWNER_GROUP
215 | FATTR4_WORD1_RAWDEV
216 | FATTR4_WORD1_SPACE_USED
217 | FATTR4_WORD1_TIME_ACCESS
218 | FATTR4_WORD1_TIME_METADATA
219 | FATTR4_WORD1_TIME_MODIFY,
220 FATTR4_WORD2_MDSTHRESHOLD
95864c91
TM		 221#ifdef CONFIG_NFS_V4_SECURITY_LABEL
222 | FATTR4_WORD2_SECURITY_LABEL
223#endif
1549210f
TM		 224};
225
e23008ec
AA		 226static const u32 nfs4_open_noattr_bitmap[3] = {
227 FATTR4_WORD0_TYPE
e23008ec
AA		 228 | FATTR4_WORD0_FILEID,
229};
230
a09df2ca 231const u32 nfs4_statfs_bitmap[3] = {
1da177e4
LT		 232 FATTR4_WORD0_FILES_AVAIL
233 | FATTR4_WORD0_FILES_FREE
234 | FATTR4_WORD0_FILES_TOTAL,
235 FATTR4_WORD1_SPACE_AVAIL
236 | FATTR4_WORD1_SPACE_FREE
237 | FATTR4_WORD1_SPACE_TOTAL
238};
239
a09df2ca 240const u32 nfs4_pathconf_bitmap[3] = {
1da177e4
LT		 241 FATTR4_WORD0_MAXLINK
242 | FATTR4_WORD0_MAXNAME,
243 0
244};
245
dae100c2 246const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
1da177e4
LT		 247 | FATTR4_WORD0_MAXREAD
248 | FATTR4_WORD0_MAXWRITE
249 | FATTR4_WORD0_LEASE_TIME,
55b6e774 250 FATTR4_WORD1_TIME_DELTA
dae100c2
FI		 251 | FATTR4_WORD1_FS_LAYOUT_TYPES,
252 FATTR4_WORD2_LAYOUT_BLKSIZE
2a92ee92 253 | FATTR4_WORD2_CLONE_BLKSIZE
1da177e4
LT		 254};
255
a09df2ca 256const u32 nfs4_fs_locations_bitmap[3] = {
830b8e33
MN		 257 FATTR4_WORD0_TYPE
258 | FATTR4_WORD0_CHANGE
259 | FATTR4_WORD0_SIZE
260 | FATTR4_WORD0_FSID
261 | FATTR4_WORD0_FILEID
262 | FATTR4_WORD0_FS_LOCATIONS,
263 FATTR4_WORD1_MODE
264 | FATTR4_WORD1_NUMLINKS
265 | FATTR4_WORD1_OWNER
266 | FATTR4_WORD1_OWNER_GROUP
267 | FATTR4_WORD1_RAWDEV
268 | FATTR4_WORD1_SPACE_USED
269 | FATTR4_WORD1_TIME_ACCESS
270 | FATTR4_WORD1_TIME_METADATA
271 | FATTR4_WORD1_TIME_MODIFY
a09df2ca 272 | FATTR4_WORD1_MOUNTED_ON_FILEID,
830b8e33
MN		 273};
274
bc4785cd 275static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 276 struct nfs4_readdir_arg *readdir)
277{
0dbb4c67 278 __be32 *start, *p;
1da177e4 279
1da177e4 280 if (cookie > 2) {
b7ef1956 281 readdir->cookie = cookie;
1da177e4
LT		 282 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
283 return;
284 }
285
286 readdir->cookie = 0;
287 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
288 if (cookie == 2)
289 return;
290
291 /*
292 * NFSv4 servers do not return entries for '.' and '..'
293 * Therefore, we fake these entries here. We let '.'
294 * have cookie 0 and '..' have cookie 1. Note that
295 * when talking to the server, we always send cookie 0
296 * instead of 1 or 2.
297 */
2b86ce2d 298 start = p = kmap_atomic(*readdir->pages);
1da177e4
LT		 299
300 if (cookie == 0) {
301 *p++ = xdr_one; /* next */
302 *p++ = xdr_zero; /* cookie, first word */
303 *p++ = xdr_one; /* cookie, second word */
304 *p++ = xdr_one; /* entry len */
305 memcpy(p, ".\0\0\0", 4); /* entry */
306 p++;
307 *p++ = xdr_one; /* bitmap length */
308 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
309 *p++ = htonl(8); /* attribute buffer length */
2b0143b5 310 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry)));
1da177e4
LT		 311 }
312
313 *p++ = xdr_one; /* next */
314 *p++ = xdr_zero; /* cookie, first word */
315 *p++ = xdr_two; /* cookie, second word */
316 *p++ = xdr_two; /* entry len */
317 memcpy(p, "..\0\0", 4); /* entry */
318 p++;
319 *p++ = xdr_one; /* bitmap length */
320 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
321 *p++ = htonl(8); /* attribute buffer length */
2b0143b5 322 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry->d_parent)));
1da177e4
LT		 323
324 readdir->pgbase = (char *)p - (char *)start;
325 readdir->count -= readdir->pgbase;
2b86ce2d 326 kunmap_atomic(start);
1da177e4
LT		 327}
328
26d36301
TM		 329static void nfs4_test_and_free_stateid(struct nfs_server *server,
330 nfs4_stateid *stateid,
331 struct rpc_cred *cred)
332{
333 const struct nfs4_minor_version_ops *ops = server->nfs_client->cl_mvops;
334
335 ops->test_and_free_expired(server, stateid, cred);
336}
337
338static void __nfs4_free_revoked_stateid(struct nfs_server *server,
339 nfs4_stateid *stateid,
340 struct rpc_cred *cred)
341{
342 stateid->type = NFS4_REVOKED_STATEID_TYPE;
343 nfs4_test_and_free_stateid(server, stateid, cred);
344}
345
346static void nfs4_free_revoked_stateid(struct nfs_server *server,
347 const nfs4_stateid *stateid,
348 struct rpc_cred *cred)
349{
350 nfs4_stateid tmp;
351
352 nfs4_stateid_copy(&tmp, stateid);
353 __nfs4_free_revoked_stateid(server, &tmp, cred);
354}
355
8478eaa1
N		 356static long nfs4_update_delay(long *timeout)
357{
358 long ret;
359 if (!timeout)
360 return NFS4_POLL_RETRY_MAX;
361 if (*timeout <= 0)
362 *timeout = NFS4_POLL_RETRY_MIN;
363 if (*timeout > NFS4_POLL_RETRY_MAX)
364 *timeout = NFS4_POLL_RETRY_MAX;
365 ret = *timeout;
366 *timeout <<= 1;
367 return ret;
368}
369
65de872e
TM		 370static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
371{
372 int res = 0;
373
374 might_sleep();
375
8478eaa1
N		 376 freezable_schedule_timeout_killable_unsafe(
377 nfs4_update_delay(timeout));
65de872e
TM		 378 if (fatal_signal_pending(current))
379 res = -ERESTARTSYS;
65de872e
TM		 380 return res;
381}
382
383/* This is the error handling routine for processes that are allowed
384 * to sleep.
385 */
b3c2aa07
TM		 386static int nfs4_do_handle_exception(struct nfs_server *server,
387 int errorcode, struct nfs4_exception *exception)
65de872e
TM		 388{
389 struct nfs_client *clp = server->nfs_client;
9e33bed5 390 struct nfs4_state *state = exception->state;
8487c479 391 const nfs4_stateid *stateid = exception->stateid;
3114ea7a 392 struct inode *inode = exception->inode;
65de872e
TM		 393 int ret = errorcode;
394
b3c2aa07
TM		 395 exception->delay = 0;
396 exception->recovering = 0;
65de872e 397 exception->retry = 0;
272289a3
TM		 398
399 if (stateid == NULL && state != NULL)
400 stateid = &state->stateid;
401
65de872e
TM		 402 switch(errorcode) {
403 case 0:
404 return 0;
5ba12443
TM		 405 case -NFS4ERR_DELEG_REVOKED:
406 case -NFS4ERR_ADMIN_REVOKED:
272289a3 407 case -NFS4ERR_EXPIRED:
5ba12443 408 case -NFS4ERR_BAD_STATEID:
272289a3
TM		 409 if (inode != NULL && stateid != NULL) {
410 nfs_inode_find_state_and_recover(inode,
411 stateid);
412 goto wait_on_recovery;
413 }
414 case -NFS4ERR_OPENMODE:
8487c479
TM		 415 if (inode) {
416 int err;
417
418 err = nfs_async_inode_return_delegation(inode,
419 stateid);
420 if (err == 0)
421 goto wait_on_recovery;
422 if (stateid != NULL && stateid->type == NFS4_DELEGATION_STATEID_TYPE) {
423 exception->retry = 1;
424 break;
425 }
426 }
3114ea7a
TM		 427 if (state == NULL)
428 break;
5d422301
TM		 429 ret = nfs4_schedule_stateid_recovery(server, state);
430 if (ret < 0)
431 break;
3114ea7a 432 goto wait_on_recovery;
65de872e 433 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 434 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 435 nfs4_schedule_lease_recovery(clp);
436 goto wait_on_recovery;
519ae255
CL		 437 case -NFS4ERR_MOVED:
438 ret = nfs4_schedule_migration_recovery(server);
439 if (ret < 0)
440 break;
441 goto wait_on_recovery;
8ef2f8d4
CL		 442 case -NFS4ERR_LEASE_MOVED:
443 nfs4_schedule_lease_moved_recovery(clp);
444 goto wait_on_recovery;
03391693 445#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 446 case -NFS4ERR_BADSESSION:
447 case -NFS4ERR_BADSLOT:
448 case -NFS4ERR_BAD_HIGH_SLOT:
449 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
450 case -NFS4ERR_DEADSESSION:
451 case -NFS4ERR_SEQ_FALSE_RETRY:
452 case -NFS4ERR_SEQ_MISORDERED:
453 dprintk("%s ERROR: %d Reset session\n", __func__,
454 errorcode);
9f594791 455 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
399f11c3 456 goto wait_on_recovery;
03391693 457#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 458 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 459 if (exception->timeout > HZ) {
460 /* We have retried a decent amount, time to
461 * fail
462 */
463 ret = -EBUSY;
464 break;
465 }
65de872e 466 case -NFS4ERR_DELAY:
2598ed34
TM		 467 nfs_inc_server_stats(server, NFSIOS_DELAY);
468 case -NFS4ERR_GRACE:
e85d7ee4 469 case -NFS4ERR_LAYOUTTRYLATER:
183d9e7b 470 case -NFS4ERR_RECALLCONFLICT:
b3c2aa07
TM		 471 exception->delay = 1;
472 return 0;
473
a8a4ae3a 474 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 475 case -NFS4ERR_OLD_STATEID:
476 exception->retry = 1;
b064eca2
TM		 477 break;
478 case -NFS4ERR_BADOWNER:
479 /* The following works around a Linux server bug! */
480 case -NFS4ERR_BADNAME:
481 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
482 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
483 exception->retry = 1;
484 printk(KERN_WARNING "NFS: v4 server %s "
485 "does not accept raw "
486 "uid/gids. "
487 "Reenabling the idmapper.\n",
488 server->nfs_client->cl_hostname);
489 }
65de872e
TM		 490 }
491 /* We failed to handle the error */
492 return nfs4_map_errors(ret);
0400a6b0 493wait_on_recovery:
b3c2aa07
TM		 494 exception->recovering = 1;
495 return 0;
496}
497
498/* This is the error handling routine for processes that are allowed
499 * to sleep.
500 */
501int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
502{
503 struct nfs_client *clp = server->nfs_client;
504 int ret;
505
506 ret = nfs4_do_handle_exception(server, errorcode, exception);
507 if (exception->delay) {
508 ret = nfs4_delay(server->client, &exception->timeout);
509 goto out_retry;
510 }
511 if (exception->recovering) {
512 ret = nfs4_wait_clnt_recover(clp);
513 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
514 return -EIO;
515 goto out_retry;
516 }
517 return ret;
518out_retry:
a2c0b9e2
TM		 519 if (ret == 0)
520 exception->retry = 1;
521 return ret;
65de872e
TM		 522}
523
037fc980
TM		 524static int
525nfs4_async_handle_exception(struct rpc_task *task, struct nfs_server *server,
526 int errorcode, struct nfs4_exception *exception)
527{
528 struct nfs_client *clp = server->nfs_client;
529 int ret;
530
531 ret = nfs4_do_handle_exception(server, errorcode, exception);
532 if (exception->delay) {
533 rpc_delay(task, nfs4_update_delay(&exception->timeout));
534 goto out_retry;
535 }
536 if (exception->recovering) {
537 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
538 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
539 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
540 goto out_retry;
541 }
519ae255 542 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
037fc980
TM		 543 ret = -EIO;
544 return ret;
545out_retry:
a2c0b9e2
TM		 546 if (ret == 0)
547 exception->retry = 1;
548 return ret;
65de872e
TM		 549}
550
037fc980
TM		 551static int
552nfs4_async_handle_error(struct rpc_task *task, struct nfs_server *server,
553 struct nfs4_state *state, long *timeout)
554{
555 struct nfs4_exception exception = {
556 .state = state,
557 };
558
559 if (task->tk_status >= 0)
560 return 0;
561 if (timeout)
562 exception.timeout = *timeout;
563 task->tk_status = nfs4_async_handle_exception(task, server,
564 task->tk_status,
565 &exception);
566 if (exception.delay && timeout)
567 *timeout = exception.timeout;
568 if (exception.retry)
569 return -EAGAIN;
570 return 0;
571}
572
a5250def
WAA		 573/*
574 * Return 'true' if 'clp' is using an rpc_client that is integrity protected
575 * or 'false' otherwise.
576 */
577static bool _nfs4_is_integrity_protected(struct nfs_client *clp)
578{
579 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor;
eeea5361 580 return (flavor == RPC_AUTH_GSS_KRB5I) || (flavor == RPC_AUTH_GSS_KRB5P);
a5250def 581}
65de872e 582
452e9352 583static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 584{
1da177e4
LT		 585 spin_lock(&clp->cl_lock);
586 if (time_before(clp->cl_last_renewal,timestamp))
587 clp->cl_last_renewal = timestamp;
588 spin_unlock(&clp->cl_lock);
589}
590
452e9352
TM		 591static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
592{
be824167
TM		 593 struct nfs_client *clp = server->nfs_client;
594
595 if (!nfs4_has_session(clp))
596 do_renew_lease(clp, timestamp);
452e9352
TM		 597}
598
2a3eb2b9
CL		 599struct nfs4_call_sync_data {
600 const struct nfs_server *seq_server;
601 struct nfs4_sequence_args *seq_args;
602 struct nfs4_sequence_res *seq_res;
603};
604
be3a5d23
TM		 605void nfs4_init_sequence(struct nfs4_sequence_args *args,
606 struct nfs4_sequence_res *res, int cache_reply)
a9c92d6b
CL		 607{
608 args->sa_slot = NULL;
609 args->sa_cache_this = cache_reply;
610 args->sa_privileged = 0;
611
612 res->sr_slot = NULL;
613}
614
615static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
616{
617 args->sa_privileged = 1;
618}
619
2e80dbe7 620static void nfs40_sequence_free_slot(struct nfs4_sequence_res *res)
3bd2384a
CL		 621{
622 struct nfs4_slot *slot = res->sr_slot;
623 struct nfs4_slot_table *tbl;
624
3bd2384a
CL		 625 tbl = slot->table;
626 spin_lock(&tbl->slot_tbl_lock);
627 if (!nfs41_wake_and_assign_slot(tbl, slot))
628 nfs4_free_slot(tbl, slot);
629 spin_unlock(&tbl->slot_tbl_lock);
630
631 res->sr_slot = NULL;
2e80dbe7
TM		 632}
633
634static int nfs40_sequence_done(struct rpc_task *task,
635 struct nfs4_sequence_res *res)
636{
637 if (res->sr_slot != NULL)
638 nfs40_sequence_free_slot(res);
3bd2384a
CL		 639 return 1;
640}
641
cccef3b9
AA		 642#if defined(CONFIG_NFS_V4_1)
643
d185a334 644static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871 645{
e3725ec0 646 struct nfs4_session *session;
13615871 647 struct nfs4_slot_table *tbl;
a13ce7c6 648 struct nfs4_slot *slot = res->sr_slot;
c10e4498 649 bool send_new_highest_used_slotid = false;
13615871 650
a13ce7c6 651 tbl = slot->table;
e3725ec0 652 session = tbl->session;
ea028ac9 653
07e8dcbd
TM		 654 /* Bump the slot sequence number */
655 if (slot->seq_done)
656 slot->seq_nr++;
657 slot->seq_done = 0;
658
35dc1d74 659 spin_lock(&tbl->slot_tbl_lock);
c10e4498
TM		 660 /* Be nice to the server: try to ensure that the last transmitted
661 * value for highest_user_slotid <= target_highest_slotid
662 */
663 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
664 send_new_highest_used_slotid = true;
665
a13ce7c6 666 if (nfs41_wake_and_assign_slot(tbl, slot)) {
b75ad4cd
TM		 667 send_new_highest_used_slotid = false;
668 goto out_unlock;
669 }
a13ce7c6 670 nfs4_free_slot(tbl, slot);
c10e4498
TM		 671
672 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
673 send_new_highest_used_slotid = false;
b75ad4cd 674out_unlock:
35dc1d74 675 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 676 res->sr_slot = NULL;
c10e4498 677 if (send_new_highest_used_slotid)
3f10a6af 678 nfs41_notify_server(session->clp);
045d2a6d
TM		 679 if (waitqueue_active(&tbl->slot_waitq))
680 wake_up_all(&tbl->slot_waitq);
13615871
AA		 681}
682
2e80dbe7
TM		 683static int nfs41_sequence_process(struct rpc_task *task,
684 struct nfs4_sequence_res *res)
b0df806c 685{
e3725ec0 686 struct nfs4_session *session;
a13ce7c6 687 struct nfs4_slot *slot = res->sr_slot;
14516c3a 688 struct nfs_client *clp;
ac20d163 689 bool interrupted = false;
85563073 690 int ret = 1;
b0df806c 691
a13ce7c6
TM		 692 if (slot == NULL)
693 goto out_noaction;
468f8613
BS		 694 /* don't increment the sequence number if the task wasn't sent */
695 if (!RPC_WAS_SENT(task))
b0df806c
AA		 696 goto out;
697
e3725ec0 698 session = slot->table->session;
933602e3 699
ac20d163
TM		 700 if (slot->interrupted) {
701 slot->interrupted = 0;
702 interrupted = true;
703 }
704
2f92ae34 705 trace_nfs4_sequence_done(session, res);
691daf3b 706 /* Check the SEQUENCE operation status */
14516c3a
TM		 707 switch (res->sr_status) {
708 case 0:
a865880e
OK		 709 /* If previous op on slot was interrupted and we reused
710 * the seq# and got a reply from the cache, then retry
711 */
712 if (task->tk_status == -EREMOTEIO && interrupted) {
713 ++slot->seq_nr;
714 goto retry_nowait;
715 }
b0df806c 716 /* Update the slot's sequence and clientid lease timer */
07e8dcbd 717 slot->seq_done = 1;
e3725ec0 718 clp = session->clp;
8e63b6a8 719 do_renew_lease(clp, res->sr_timestamp);
0629e370 720 /* Check sequence flags */
0a014a44
TM		 721 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags,
722 !!slot->privileged);
464ee9f9 723 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a 724 break;
ac20d163
TM		 725 case 1:
726 /*
727 * sr_status remains 1 if an RPC level error occurred.
728 * The server may or may not have processed the sequence
729 * operation..
730 * Mark the slot as having hosted an interrupted RPC call.
731 */
732 slot->interrupted = 1;
733 goto out;
14516c3a
TM		 734 case -NFS4ERR_DELAY:
735 /* The server detected a resend of the RPC call and
736 * returned NFS4ERR_DELAY as per Section 2.10.6.2
737 * of RFC5661.
738 */
df2fabff 739 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 740 __func__,
df2fabff 741 slot->slot_nr,
933602e3 742 slot->seq_nr);
14516c3a 743 goto out_retry;
85563073
TM		 744 case -NFS4ERR_BADSLOT:
745 /*
746 * The slot id we used was probably retired. Try again
747 * using a different slot id.
748 */
e8794440
TM		 749 goto retry_nowait;
750 case -NFS4ERR_SEQ_MISORDERED:
ac20d163
TM		 751 /*
752 * Was the last operation on this sequence interrupted?
753 * If so, retry after bumping the sequence number.
754 */
755 if (interrupted) {
756 ++slot->seq_nr;
757 goto retry_nowait;
758 }
e8794440
TM		 759 /*
760 * Could this slot have been previously retired?
761 * If so, then the server may be expecting seq_nr = 1!
762 */
8e63b6a8
TM		 763 if (slot->seq_nr != 1) {
764 slot->seq_nr = 1;
765 goto retry_nowait;
766 }
767 break;
e8794440
TM		 768 case -NFS4ERR_SEQ_FALSE_RETRY:
769 ++slot->seq_nr;
770 goto retry_nowait;
14516c3a
TM		 771 default:
772 /* Just update the slot sequence no. */
07e8dcbd 773 slot->seq_done = 1;
b0df806c
AA		 774 }
775out:
776 /* The session may be reset by one of the error handlers. */
777 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
a13ce7c6 778out_noaction:
85563073 779 return ret;
e8794440
TM		 780retry_nowait:
781 if (rpc_restart_call_prepare(task)) {
2e80dbe7 782 nfs41_sequence_free_slot(res);
e8794440
TM		 783 task->tk_status = 0;
784 ret = 0;
785 }
786 goto out;
14516c3a 787out_retry:
d05dd4e9 788 if (!rpc_restart_call(task))
14516c3a
TM		 789 goto out;
790 rpc_delay(task, NFS4_POLL_RETRY_MAX);
791 return 0;
b0df806c 792}
2e80dbe7
TM		 793
794int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
795{
796 if (!nfs41_sequence_process(task, res))
797 return 0;
798 if (res->sr_slot != NULL)
799 nfs41_sequence_free_slot(res);
800 return 1;
801
802}
f9c96fcc 803EXPORT_SYMBOL_GPL(nfs41_sequence_done);
b0df806c 804
2e80dbe7
TM		 805static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res)
806{
807 if (res->sr_slot == NULL)
808 return 1;
809 if (res->sr_slot->table->session != NULL)
810 return nfs41_sequence_process(task, res);
811 return nfs40_sequence_done(task, res);
812}
813
814static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res)
815{
816 if (res->sr_slot != NULL) {
817 if (res->sr_slot->table->session != NULL)
818 nfs41_sequence_free_slot(res);
819 else
820 nfs40_sequence_free_slot(res);
821 }
822}
823
2c4b131d 824int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
df896455 825{
e3725ec0 826 if (res->sr_slot == NULL)
14516c3a 827 return 1;
3bd2384a
CL		 828 if (!res->sr_slot->table->session)
829 return nfs40_sequence_done(task, res);
14516c3a 830 return nfs41_sequence_done(task, res);
df896455 831}
2c4b131d 832EXPORT_SYMBOL_GPL(nfs4_sequence_done);
df896455 833
ce5039c1
AA		 834static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
835{
2a3eb2b9 836 struct nfs4_call_sync_data *data = calldata;
ce5039c1 837
035168ab
TM		 838 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
839
7981c8a6
AS		 840 nfs4_setup_sequence(data->seq_server->nfs_client,
841 data->seq_args, data->seq_res, task);
ce5039c1
AA		 842}
843
69ab40c4
AA		 844static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
845{
2a3eb2b9 846 struct nfs4_call_sync_data *data = calldata;
69ab40c4 847
14516c3a 848 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 849}
850
17280175 851static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 852 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 853 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 854};
855
3bd2384a
CL		 856#else /* !CONFIG_NFS_V4_1 */
857
2e80dbe7
TM		 858static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res)
859{
860 return nfs40_sequence_done(task, res);
861}
862
863static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res)
864{
865 if (res->sr_slot != NULL)
866 nfs40_sequence_free_slot(res);
867}
868
2c4b131d
PT		 869int nfs4_sequence_done(struct rpc_task *task,
870 struct nfs4_sequence_res *res)
9915ea7e 871{
3bd2384a 872 return nfs40_sequence_done(task, res);
9915ea7e 873}
2c4b131d 874EXPORT_SYMBOL_GPL(nfs4_sequence_done);
3bd2384a
CL		 875
876#endif /* !CONFIG_NFS_V4_1 */
9915ea7e 877
7981c8a6
AS		 878int nfs4_setup_sequence(const struct nfs_client *client,
879 struct nfs4_sequence_args *args,
880 struct nfs4_sequence_res *res,
881 struct rpc_task *task)
882{
7981c8a6 883 struct nfs4_session *session = nfs4_get_session(client);
76ee0354 884 struct nfs4_slot_table *tbl = client->cl_slot_tbl;
3d35808b 885 struct nfs4_slot *slot;
7981c8a6 886
9dd9107f
AS		 887 /* slot already allocated? */
888 if (res->sr_slot != NULL)
889 goto out_start;
890
76ee0354
AS		 891 if (session) {
892 tbl = &session->fc_slot_table;
893 task->tk_timeout = 0;
894 }
895
6994cdd7 896 spin_lock(&tbl->slot_tbl_lock);
76ee0354
AS		 897 /* The state manager will wait until the slot table is empty */
898 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
899 goto out_sleep;
6994cdd7 900
3d35808b
AS		 901 slot = nfs4_alloc_slot(tbl);
902 if (IS_ERR(slot)) {
903 /* Try again in 1/4 second */
904 if (slot == ERR_PTR(-ENOMEM))
905 task->tk_timeout = HZ >> 2;
0dcee8bb 906 goto out_sleep;
3d35808b 907 }
6994cdd7 908 spin_unlock(&tbl->slot_tbl_lock);
7981c8a6 909
3d35808b
AS		 910 slot->privileged = args->sa_privileged ? 1 : 0;
911 args->sa_slot = slot;
912
913 res->sr_slot = slot;
914 if (session) {
915 res->sr_timestamp = jiffies;
916 res->sr_status_flags = 0;
917 res->sr_status = 1;
3d35808b
AS		 918 }
919
ad05cc0f 920 trace_nfs4_setup_sequence(session, args);
9dd9107f
AS		 921out_start:
922 rpc_call_start(task);
923 return 0;
0dcee8bb
AS		 924
925out_sleep:
926 if (args->sa_privileged)
927 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
928 NULL, RPC_PRIORITY_PRIVILEGED);
929 else
930 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
931 spin_unlock(&tbl->slot_tbl_lock);
932 return -EAGAIN;
7981c8a6
AS		 933}
934EXPORT_SYMBOL_GPL(nfs4_setup_sequence);
935
9915ea7e
CL		 936static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
937{
938 struct nfs4_call_sync_data *data = calldata;
42e1cca7 939 nfs4_setup_sequence(data->seq_server->nfs_client,
9915ea7e
CL		 940 data->seq_args, data->seq_res, task);
941}
942
943static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
944{
945 struct nfs4_call_sync_data *data = calldata;
946 nfs4_sequence_done(task, data->seq_res);
947}
948
949static const struct rpc_call_ops nfs40_call_sync_ops = {
950 .rpc_call_prepare = nfs40_call_sync_prepare,
951 .rpc_call_done = nfs40_call_sync_done,
952};
953
7c513058
BS		 954static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
955 struct nfs_server *server,
ce5039c1
AA		 956 struct rpc_message *msg,
957 struct nfs4_sequence_args *args,
8fe72bac 958 struct nfs4_sequence_res *res)
ce5039c1
AA		 959{
960 int ret;
961 struct rpc_task *task;
9915ea7e 962 struct nfs_client *clp = server->nfs_client;
2a3eb2b9 963 struct nfs4_call_sync_data data = {
035168ab 964 .seq_server = server,
ce5039c1
AA		 965 .seq_args = args,
966 .seq_res = res,
ce5039c1
AA		 967 };
968 struct rpc_task_setup task_setup = {
7c513058 969 .rpc_client = clnt,
ce5039c1 970 .rpc_message = msg,
9915ea7e 971 .callback_ops = clp->cl_mvops->call_sync_ops,
ce5039c1
AA		 972 .callback_data = &data
973 };
974
ce5039c1
AA		 975 task = rpc_run_task(&task_setup);
976 if (IS_ERR(task))
977 ret = PTR_ERR(task);
978 else {
979 ret = task->tk_status;
980 rpc_put_task(task);
981 }
982 return ret;
983}
984
7c513058
BS		 985int nfs4_call_sync(struct rpc_clnt *clnt,
986 struct nfs_server *server,
e73b83f2
BS		 987 struct rpc_message *msg,
988 struct nfs4_sequence_args *args,
989 struct nfs4_sequence_res *res,
990 int cache_reply)
991{
a9c92d6b 992 nfs4_init_sequence(args, res, cache_reply);
9915ea7e 993 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
e73b83f2 994}
cccef3b9 995
d3129ef6
TM		 996static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo,
997 unsigned long timestamp)
1da177e4 998{
38478b24 999 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 1000
38478b24 1001 spin_lock(&dir->i_lock);
359d7d1c 1002 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
e603a4c1
TM		 1003 if (cinfo->atomic && cinfo->before == dir->i_version) {
1004 nfsi->cache_validity &= ~NFS_INO_REVAL_PAGECACHE;
1005 nfsi->attrtimeo_timestamp = jiffies;
1006 } else {
bfc69a45 1007 nfs_force_lookup_revalidate(dir);
e603a4c1
TM		 1008 if (cinfo->before != dir->i_version)
1009 nfsi->cache_validity |= NFS_INO_INVALID_ACCESS |
1010 NFS_INO_INVALID_ACL;
1011 }
a9a4a87a 1012 dir->i_version = cinfo->after;
d3129ef6 1013 nfsi->read_cache_jiffies = timestamp;
3235b403 1014 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
de242c0b 1015 nfs_fscache_invalidate(dir);
38478b24 1016 spin_unlock(&dir->i_lock);
1da177e4
LT		 1017}
1018
e56e0b78 1019struct nfs4_opendata {
c6d00e63 1020 struct kref kref;
e56e0b78
TM		 1021 struct nfs_openargs o_arg;
1022 struct nfs_openres o_res;
cdd4e68b
TM		 1023 struct nfs_open_confirmargs c_arg;
1024 struct nfs_open_confirmres c_res;
6926afd1
TM		 1025 struct nfs4_string owner_name;
1026 struct nfs4_string group_name;
a49c2691 1027 struct nfs4_label *a_label;
e56e0b78 1028 struct nfs_fattr f_attr;
1775fd3e 1029 struct nfs4_label *f_label;
e56e0b78 1030 struct dentry *dir;
82a2c1b7 1031 struct dentry *dentry;
e56e0b78 1032 struct nfs4_state_owner *owner;
aac00a8d 1033 struct nfs4_state *state;
e56e0b78 1034 struct iattr attrs;
26e976a8 1035 unsigned long timestamp;
3e309914 1036 unsigned int rpc_done : 1;
5bc2afc2 1037 unsigned int file_created : 1;
bdeca1b7 1038 unsigned int is_recover : 1;
24ac23ab
TM		 1039 int rpc_status;
1040 int cancelled;
e56e0b78
TM		 1041};
1042
49f9a0fa
TM		 1043static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
1044 int err, struct nfs4_exception *exception)
1045{
1046 if (err != -EINVAL)
1047 return false;
1048 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1049 return false;
1050 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
1051 exception->retry = 1;
1052 return true;
1053}
1054
6ae37339
TM		 1055static u32
1056nfs4_map_atomic_open_share(struct nfs_server *server,
1057 fmode_t fmode, int openflags)
1058{
1059 u32 res = 0;
1060
1061 switch (fmode & (FMODE_READ | FMODE_WRITE)) {
1062 case FMODE_READ:
1063 res = NFS4_SHARE_ACCESS_READ;
1064 break;
1065 case FMODE_WRITE:
1066 res = NFS4_SHARE_ACCESS_WRITE;
1067 break;
1068 case FMODE_READ|FMODE_WRITE:
1069 res = NFS4_SHARE_ACCESS_BOTH;
1070 }
1071 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1072 goto out;
1073 /* Want no delegation if we're using O_DIRECT */
1074 if (openflags & O_DIRECT)
1075 res |= NFS4_SHARE_WANT_NO_DELEG;
1076out:
1077 return res;
1078}
1079
49f9a0fa
TM		 1080static enum open_claim_type4
1081nfs4_map_atomic_open_claim(struct nfs_server *server,
1082 enum open_claim_type4 claim)
1083{
1084 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
1085 return claim;
1086 switch (claim) {
1087 default:
1088 return claim;
1089 case NFS4_OPEN_CLAIM_FH:
1090 return NFS4_OPEN_CLAIM_NULL;
1091 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1092 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
1093 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1094 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
1095 }
1096}
2ced46c2
TM		 1097
1098static void nfs4_init_opendata_res(struct nfs4_opendata *p)
1099{
1100 p->o_res.f_attr = &p->f_attr;
1775fd3e 1101 p->o_res.f_label = p->f_label;
c1d51931
TM		 1102 p->o_res.seqid = p->o_arg.seqid;
1103 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 1104 p->o_res.server = p->o_arg.server;
5f657530 1105 p->o_res.access_request = p->o_arg.access;
2ced46c2 1106 nfs_fattr_init(&p->f_attr);
6926afd1 1107 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 1108}
1109
82a2c1b7 1110static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 1111 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be 1112 const struct iattr *attrs,
1775fd3e 1113 struct nfs4_label *label,
4a1c0893 1114 enum open_claim_type4 claim,
8535b2be 1115 gfp_t gfp_mask)
e56e0b78 1116{
82a2c1b7 1117 struct dentry *parent = dget_parent(dentry);
2b0143b5 1118 struct inode *dir = d_inode(parent);
e56e0b78 1119 struct nfs_server *server = NFS_SERVER(dir);
63f5f796 1120 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
e56e0b78
TM		 1121 struct nfs4_opendata *p;
1122
8535b2be 1123 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 1124 if (p == NULL)
1125 goto err;
14c43f76
DQ		 1126
1127 p->f_label = nfs4_label_alloc(server, gfp_mask);
1128 if (IS_ERR(p->f_label))
1129 goto err_free_p;
1130
a49c2691
KM		 1131 p->a_label = nfs4_label_alloc(server, gfp_mask);
1132 if (IS_ERR(p->a_label))
1133 goto err_free_f;
1134
63f5f796
TM		 1135 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
1136 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask);
badc76dd 1137 if (IS_ERR(p->o_arg.seqid))
14c43f76 1138 goto err_free_label;
82a2c1b7
AV		 1139 nfs_sb_active(dentry->d_sb);
1140 p->dentry = dget(dentry);
e56e0b78
TM		 1141 p->dir = parent;
1142 p->owner = sp;
1143 atomic_inc(&sp->so_count);
dc0b027d
TM		 1144 p->o_arg.open_flags = flags;
1145 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
dff25ddb 1146 p->o_arg.umask = current_umask();
536585cc 1147 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
6ae37339
TM		 1148 p->o_arg.share_access = nfs4_map_atomic_open_share(server,
1149 fmode, flags);
ae2bb032
WAA		 1150 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
1151 * will return permission denied for all bits until close */
1152 if (!(flags & O_EXCL)) {
1153 /* ask server to check for all possible rights as results
1154 * are cached */
536585cc
TM		 1155 switch (p->o_arg.claim) {
1156 default:
1157 break;
1158 case NFS4_OPEN_CLAIM_NULL:
1159 case NFS4_OPEN_CLAIM_FH:
1160 p->o_arg.access = NFS4_ACCESS_READ |
1161 NFS4_ACCESS_MODIFY |
1162 NFS4_ACCESS_EXTEND |
1163 NFS4_ACCESS_EXECUTE;
1164 }
ae2bb032 1165 }
7539bbab 1166 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 1167 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1168 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 1169 p->o_arg.name = &dentry->d_name;
e56e0b78 1170 p->o_arg.server = server;
aa9c2669 1171 p->o_arg.bitmask = nfs4_bitmask(server, label);
1549210f 1172 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
a49c2691 1173 p->o_arg.label = nfs4_label_copy(p->a_label, label);
49f9a0fa 1174 switch (p->o_arg.claim) {
4a1c0893
TM		 1175 case NFS4_OPEN_CLAIM_NULL:
1176 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1177 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1178 p->o_arg.fh = NFS_FH(dir);
1179 break;
1180 case NFS4_OPEN_CLAIM_PREVIOUS:
1181 case NFS4_OPEN_CLAIM_FH:
1182 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1183 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
2b0143b5 1184 p->o_arg.fh = NFS_FH(d_inode(dentry));
4a1c0893 1185 }
536e43d1 1186 if (attrs != NULL && attrs->ia_valid != 0) {
c281fa9c 1187 __u32 verf[2];
d77d76ff 1188
e56e0b78
TM		 1189 p->o_arg.u.attrs = &p->attrs;
1190 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 1191
1192 verf[0] = jiffies;
1193 verf[1] = current->pid;
1194 memcpy(p->o_arg.u.verifier.data, verf,
1195 sizeof(p->o_arg.u.verifier.data));
e56e0b78 1196 }
cdd4e68b
TM		 1197 p->c_arg.fh = &p->o_res.fh;
1198 p->c_arg.stateid = &p->o_res.stateid;
1199 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 1200 nfs4_init_opendata_res(p);
c6d00e63 1201 kref_init(&p->kref);
e56e0b78 1202 return p;
14c43f76
DQ		 1203
1204err_free_label:
a49c2691
KM		 1205 nfs4_label_free(p->a_label);
1206err_free_f:
14c43f76
DQ		 1207 nfs4_label_free(p->f_label);
1208err_free_p:
e56e0b78
TM		 1209 kfree(p);
1210err:
1211 dput(parent);
1212 return NULL;
1213}
1214
c6d00e63 1215static void nfs4_opendata_free(struct kref *kref)
e56e0b78 1216{
c6d00e63
TM		 1217 struct nfs4_opendata *p = container_of(kref,
1218 struct nfs4_opendata, kref);
82a2c1b7 1219 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 1220
1221 nfs_free_seqid(p->o_arg.seqid);
2e80dbe7 1222 nfs4_sequence_free_slot(&p->o_res.seq_res);
aac00a8d
TM		 1223 if (p->state != NULL)
1224 nfs4_put_open_state(p->state);
c6d00e63 1225 nfs4_put_state_owner(p->owner);
14c43f76 1226
a49c2691 1227 nfs4_label_free(p->a_label);
14c43f76
DQ		 1228 nfs4_label_free(p->f_label);
1229
c6d00e63 1230 dput(p->dir);
82a2c1b7
AV		 1231 dput(p->dentry);
1232 nfs_sb_deactive(sb);
6926afd1 1233 nfs_fattr_free_names(&p->f_attr);
e911b815 1234 kfree(p->f_attr.mdsthreshold);
c6d00e63
TM		 1235 kfree(p);
1236}
1237
1238static void nfs4_opendata_put(struct nfs4_opendata *p)
1239{
1240 if (p != NULL)
1241 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 1242}
1243
24311f88
TM		 1244static bool nfs4_mode_match_open_stateid(struct nfs4_state *state,
1245 fmode_t fmode)
1246{
1247 switch(fmode & (FMODE_READ|FMODE_WRITE)) {
1248 case FMODE_READ|FMODE_WRITE:
1249 return state->n_rdwr != 0;
1250 case FMODE_WRITE:
1251 return state->n_wronly != 0;
1252 case FMODE_READ:
1253 return state->n_rdonly != 0;
1254 }
1255 WARN_ON_ONCE(1);
1256 return false;
1257}
1258
dc0b027d 1259static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 1260{
1261 int ret = 0;
dc0b027d 1262
536e43d1 1263 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 1264 goto out;
1265 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 1266 case FMODE_READ:
88069f77
TM		 1267 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1268 && state->n_rdonly != 0;
6ee41268
TM		 1269 break;
1270 case FMODE_WRITE:
88069f77
TM		 1271 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1272 && state->n_wronly != 0;
6ee41268
TM		 1273 break;
1274 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 1275 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1276 && state->n_rdwr != 0;
6ee41268 1277 }
dc0b027d 1278out:
6ee41268
TM		 1279 return ret;
1280}
1281
2a606188
TM		 1282static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode,
1283 enum open_claim_type4 claim)
aac00a8d 1284{
652f89f6
TM		 1285 if (delegation == NULL)
1286 return 0;
dc0b027d 1287 if ((delegation->type & fmode) != fmode)
aac00a8d 1288 return 0;
d25be546
TM		 1289 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1290 return 0;
2a606188
TM		 1291 switch (claim) {
1292 case NFS4_OPEN_CLAIM_NULL:
1293 case NFS4_OPEN_CLAIM_FH:
1294 break;
1295 case NFS4_OPEN_CLAIM_PREVIOUS:
1296 if (!test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
1297 break;
1298 default:
1299 return 0;
1300 }
b7391f44 1301 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 1302 return 1;
1303}
1304
dc0b027d 1305static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 1306{
dc0b027d 1307 switch (fmode) {
e7616923
TM		 1308 case FMODE_WRITE:
1309 state->n_wronly++;
1310 break;
1311 case FMODE_READ:
1312 state->n_rdonly++;
1313 break;
1314 case FMODE_READ|FMODE_WRITE:
1315 state->n_rdwr++;
1316 }
dc0b027d 1317 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 1318}
1319
8a64c4ef
TM		 1320#ifdef CONFIG_NFS_V4_1
1321static bool nfs_open_stateid_recover_openmode(struct nfs4_state *state)
1322{
1323 if (state->n_rdonly && !test_bit(NFS_O_RDONLY_STATE, &state->flags))
1324 return true;
1325 if (state->n_wronly && !test_bit(NFS_O_WRONLY_STATE, &state->flags))
1326 return true;
1327 if (state->n_rdwr && !test_bit(NFS_O_RDWR_STATE, &state->flags))
1328 return true;
1329 return false;
1330}
1331#endif /* CONFIG_NFS_V4_1 */
1332
4f14c194
TM		 1333static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
1334{
1335 struct nfs_client *clp = state->owner->so_server->nfs_client;
1336 bool need_recover = false;
1337
1338 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly)
1339 need_recover = true;
1340 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly)
1341 need_recover = true;
1342 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr)
1343 need_recover = true;
1344 if (need_recover)
1345 nfs4_state_mark_reclaim_nograce(clp, state);
1346}
1347
e999e80e 1348static bool nfs_need_update_open_stateid(struct nfs4_state *state,
1393d961 1349 const nfs4_stateid *stateid, nfs4_stateid *freeme)
e999e80e
TM		 1350{
1351 if (test_and_set_bit(NFS_OPEN_STATE, &state->flags) == 0)
1352 return true;
4f14c194 1353 if (!nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1393d961 1354 nfs4_stateid_copy(freeme, &state->open_stateid);
4f14c194 1355 nfs_test_and_clear_all_open_stateid(state);
e999e80e 1356 return true;
4f14c194 1357 }
e999e80e
TM		 1358 if (nfs4_stateid_is_newer(stateid, &state->open_stateid))
1359 return true;
1360 return false;
1361}
1362
f95549cf
TM		 1363static void nfs_resync_open_stateid_locked(struct nfs4_state *state)
1364{
3c38cbe2
TM		 1365 if (!(state->n_wronly || state->n_rdonly || state->n_rdwr))
1366 return;
f95549cf
TM		 1367 if (state->n_wronly)
1368 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1369 if (state->n_rdonly)
1370 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1371 if (state->n_rdwr)
1372 set_bit(NFS_O_RDWR_STATE, &state->flags);
3c38cbe2 1373 set_bit(NFS_OPEN_STATE, &state->flags);
f95549cf
TM		 1374}
1375
226056c5
TM		 1376static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
1377 nfs4_stateid *stateid, fmode_t fmode)
003707c7 1378{
226056c5
TM		 1379 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1380 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1381 case FMODE_WRITE:
1382 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1383 break;
1384 case FMODE_READ:
1385 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1386 break;
1387 case 0:
1388 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1389 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1390 clear_bit(NFS_OPEN_STATE, &state->flags);
1391 }
1392 if (stateid == NULL)
1393 return;
3e7dfb16
TM		 1394 /* Handle OPEN+OPEN_DOWNGRADE races */
1395 if (nfs4_stateid_match_other(stateid, &state->open_stateid) &&
1396 !nfs4_stateid_is_newer(stateid, &state->open_stateid)) {
f95549cf 1397 nfs_resync_open_stateid_locked(state);
226056c5 1398 return;
f95549cf 1399 }
003707c7 1400 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 1401 nfs4_stateid_copy(&state->stateid, stateid);
1402 nfs4_stateid_copy(&state->open_stateid, stateid);
226056c5
TM		 1403}
1404
4a1e2feb
TM		 1405static void nfs_clear_open_stateid(struct nfs4_state *state,
1406 nfs4_stateid *arg_stateid,
1407 nfs4_stateid *stateid, fmode_t fmode)
226056c5
TM		 1408{
1409 write_seqlock(&state->seqlock);
3e7dfb16
TM		 1410 /* Ignore, if the CLOSE argment doesn't match the current stateid */
1411 if (nfs4_state_match_open_stateid_other(state, arg_stateid))
1412 nfs_clear_open_stateid_locked(state, stateid, fmode);
226056c5 1413 write_sequnlock(&state->seqlock);
4f14c194
TM		 1414 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1415 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
226056c5
TM		 1416}
1417
1393d961
TM		 1418static void nfs_set_open_stateid_locked(struct nfs4_state *state,
1419 const nfs4_stateid *stateid, fmode_t fmode,
1420 nfs4_stateid *freeme)
003707c7 1421{
dc0b027d 1422 switch (fmode) {
003707c7
TM		 1423 case FMODE_READ:
1424 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1425 break;
1426 case FMODE_WRITE:
1427 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1428 break;
1429 case FMODE_READ|FMODE_WRITE:
1430 set_bit(NFS_O_RDWR_STATE, &state->flags);
1431 }
1393d961 1432 if (!nfs_need_update_open_stateid(state, stateid, freeme))
e999e80e
TM		 1433 return;
1434 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1435 nfs4_stateid_copy(&state->stateid, stateid);
1436 nfs4_stateid_copy(&state->open_stateid, stateid);
003707c7
TM		 1437}
1438
1393d961
TM		 1439static void __update_open_stateid(struct nfs4_state *state,
1440 const nfs4_stateid *open_stateid,
1441 const nfs4_stateid *deleg_stateid,
1442 fmode_t fmode,
1443 nfs4_stateid *freeme)
1da177e4 1444{
8bda4e4c
TM		 1445 /*
1446 * Protect the call to nfs4_state_set_mode_locked and
1447 * serialise the stateid update
1448 */
361cad3c 1449 spin_lock(&state->owner->so_lock);
8bda4e4c 1450 write_seqlock(&state->seqlock);
003707c7 1451 if (deleg_stateid != NULL) {
f597c537 1452 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1453 set_bit(NFS_DELEGATED_STATE, &state->flags);
1454 }
1455 if (open_stateid != NULL)
1393d961 1456 nfs_set_open_stateid_locked(state, open_stateid, fmode, freeme);
8bda4e4c 1457 write_sequnlock(&state->seqlock);
dc0b027d 1458 update_open_stateflags(state, fmode);
ec073428 1459 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1460}
1461
1393d961
TM		 1462static int update_open_stateid(struct nfs4_state *state,
1463 const nfs4_stateid *open_stateid,
1464 const nfs4_stateid *delegation,
1465 fmode_t fmode)
34310430 1466{
1393d961
TM		 1467 struct nfs_server *server = NFS_SERVER(state->inode);
1468 struct nfs_client *clp = server->nfs_client;
34310430
TM		 1469 struct nfs_inode *nfsi = NFS_I(state->inode);
1470 struct nfs_delegation *deleg_cur;
83aa3e0f 1471 nfs4_stateid freeme = { };
34310430
TM		 1472 int ret = 0;
1473
dc0b027d 1474 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1475
1476 rcu_read_lock();
1477 deleg_cur = rcu_dereference(nfsi->delegation);
1478 if (deleg_cur == NULL)
1479 goto no_delegation;
1480
1481 spin_lock(&deleg_cur->lock);
17f26b12 1482 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
d25be546 1483 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1484 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1485 goto no_delegation_unlock;
1486
1487 if (delegation == NULL)
1488 delegation = &deleg_cur->stateid;
f597c537 1489 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1490 goto no_delegation_unlock;
1491
b7391f44 1492 nfs_mark_delegation_referenced(deleg_cur);
1393d961
TM		 1493 __update_open_stateid(state, open_stateid, &deleg_cur->stateid,
1494 fmode, &freeme);
34310430
TM		 1495 ret = 1;
1496no_delegation_unlock:
1497 spin_unlock(&deleg_cur->lock);
1498no_delegation:
1499 rcu_read_unlock();
1500
1501 if (!ret && open_stateid != NULL) {
1393d961 1502 __update_open_stateid(state, open_stateid, NULL, fmode, &freeme);
34310430
TM		 1503 ret = 1;
1504 }
4f14c194 1505 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1393d961
TM		 1506 nfs4_schedule_state_manager(clp);
1507 if (freeme.type != 0)
1508 nfs4_test_and_free_stateid(server, &freeme,
1509 state->owner->so_cred);
34310430
TM		 1510
1511 return ret;
1512}
1513
39071e6f
TM		 1514static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp,
1515 const nfs4_stateid *stateid)
1516{
1517 struct nfs4_state *state = lsp->ls_state;
1518 bool ret = false;
1519
1520 spin_lock(&state->state_lock);
1521 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid))
1522 goto out_noupdate;
1523 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid))
1524 goto out_noupdate;
1525 nfs4_stateid_copy(&lsp->ls_stateid, stateid);
1526 ret = true;
1527out_noupdate:
1528 spin_unlock(&state->state_lock);
1529 return ret;
1530}
34310430 1531
dc0b027d 1532static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1533{
1534 struct nfs_delegation *delegation;
1535
1536 rcu_read_lock();
1537 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1538 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1539 rcu_read_unlock();
1540 return;
1541 }
1542 rcu_read_unlock();
57ec14c5 1543 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1544}
1545
6ee41268 1546static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1547{
1548 struct nfs4_state *state = opendata->state;
1549 struct nfs_inode *nfsi = NFS_I(state->inode);
1550 struct nfs_delegation *delegation;
f448badd 1551 int open_mode = opendata->o_arg.open_flags;
dc0b027d 1552 fmode_t fmode = opendata->o_arg.fmode;
2a606188 1553 enum open_claim_type4 claim = opendata->o_arg.claim;
aac00a8d
TM		 1554 nfs4_stateid stateid;
1555 int ret = -EAGAIN;
1556
aac00a8d 1557 for (;;) {
61beef75 1558 spin_lock(&state->owner->so_lock);
dc0b027d 1559 if (can_open_cached(state, fmode, open_mode)) {
61beef75 1560 update_open_stateflags(state, fmode);
6ee41268 1561 spin_unlock(&state->owner->so_lock);
61beef75 1562 goto out_return_state;
6ee41268 1563 }
61beef75 1564 spin_unlock(&state->owner->so_lock);
34310430
TM		 1565 rcu_read_lock();
1566 delegation = rcu_dereference(nfsi->delegation);
2a606188 1567 if (!can_open_delegated(delegation, fmode, claim)) {
34310430 1568 rcu_read_unlock();
aac00a8d 1569 break;
34310430 1570 }
aac00a8d 1571 /* Save the delegation */
f597c537 1572 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1573 rcu_read_unlock();
fa332941 1574 nfs_release_seqid(opendata->o_arg.seqid);
bdeca1b7
TM		 1575 if (!opendata->is_recover) {
1576 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1577 if (ret != 0)
1578 goto out;
1579 }
aac00a8d 1580 ret = -EAGAIN;
34310430
TM		 1581
1582 /* Try to update the stateid using the delegation */
dc0b027d 1583 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1584 goto out_return_state;
aac00a8d 1585 }
aac00a8d
TM		 1586out:
1587 return ERR_PTR(ret);
1588out_return_state:
1589 atomic_inc(&state->count);
1590 return state;
1591}
1592
e23008ec
AA		 1593static void
1594nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1595{
1596 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1597 struct nfs_delegation *delegation;
1598 int delegation_flags = 0;
1599
1600 rcu_read_lock();
1601 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1602 if (delegation)
1603 delegation_flags = delegation->flags;
1604 rcu_read_unlock();
72d79ff8
TM		 1605 switch (data->o_arg.claim) {
1606 default:
1607 break;
1608 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1609 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
e23008ec
AA		 1610 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1611 "returning a delegation for "
1612 "OPEN(CLAIM_DELEGATE_CUR)\n",
1613 clp->cl_hostname);
72d79ff8
TM		 1614 return;
1615 }
1616 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
e23008ec
AA		 1617 nfs_inode_set_delegation(state->inode,
1618 data->owner->so_cred,
1619 &data->o_res);
1620 else
1621 nfs_inode_reclaim_delegation(state->inode,
1622 data->owner->so_cred,
1623 &data->o_res);
1624}
1625
1626/*
1627 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1628 * and update the nfs4_state.
1629 */
1630static struct nfs4_state *
1631_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1632{
1633 struct inode *inode = data->state->inode;
1634 struct nfs4_state *state = data->state;
1635 int ret;
1636
d2bfda2e 1637 if (!data->rpc_done) {
37a8484a
AS		 1638 if (data->rpc_status)
1639 return ERR_PTR(data->rpc_status);
d2bfda2e
WAA		 1640 /* cached opens have already been processed */
1641 goto update;
e23008ec
AA		 1642 }
1643
e23008ec
AA		 1644 ret = nfs_refresh_inode(inode, &data->f_attr);
1645 if (ret)
37a8484a 1646 return ERR_PTR(ret);
e23008ec
AA		 1647
1648 if (data->o_res.delegation_type != 0)
1649 nfs4_opendata_check_deleg(data, state);
d2bfda2e 1650update:
e23008ec
AA		 1651 update_open_stateid(state, &data->o_res.stateid, NULL,
1652 data->o_arg.fmode);
d49f042a 1653 atomic_inc(&state->count);
e23008ec
AA		 1654
1655 return state;
e23008ec
AA		 1656}
1657
1658static struct nfs4_state *
1659_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1660{
1661 struct inode *inode;
1662 struct nfs4_state *state = NULL;
1b370bc2 1663 int ret;
24ac23ab 1664
aac00a8d 1665 if (!data->rpc_done) {
6ee41268 1666 state = nfs4_try_open_cached(data);
9759b0fb 1667 trace_nfs4_cached_open(data->state);
aac00a8d
TM		 1668 goto out;
1669 }
1670
1b370bc2 1671 ret = -EAGAIN;
24ac23ab 1672 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1673 goto err;
1775fd3e 1674 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1b370bc2 1675 ret = PTR_ERR(inode);
03f28e3a 1676 if (IS_ERR(inode))
1b370bc2
TM		 1677 goto err;
1678 ret = -ENOMEM;
24ac23ab
TM		 1679 state = nfs4_get_open_state(inode, data->owner);
1680 if (state == NULL)
1b370bc2 1681 goto err_put_inode;
e23008ec
AA		 1682 if (data->o_res.delegation_type != 0)
1683 nfs4_opendata_check_deleg(data, state);
34310430 1684 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1685 data->o_arg.fmode);
24ac23ab 1686 iput(inode);
aac00a8d 1687out:
7aa262b5 1688 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1689 return state;
1b370bc2
TM		 1690err_put_inode:
1691 iput(inode);
1692err:
1693 return ERR_PTR(ret);
24ac23ab
TM		 1694}
1695
e23008ec
AA		 1696static struct nfs4_state *
1697nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1698{
2e80dbe7
TM		 1699 struct nfs4_state *ret;
1700
e23008ec 1701 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
2e80dbe7
TM		 1702 ret =_nfs4_opendata_reclaim_to_nfs4_state(data);
1703 else
1704 ret = _nfs4_opendata_to_nfs4_state(data);
1705 nfs4_sequence_free_slot(&data->o_res.seq_res);
1706 return ret;
e23008ec
AA		 1707}
1708
864472e9
TM		 1709static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1710{
1711 struct nfs_inode *nfsi = NFS_I(state->inode);
1712 struct nfs_open_context *ctx;
1713
1714 spin_lock(&state->inode->i_lock);
1715 list_for_each_entry(ctx, &nfsi->open_files, list) {
1716 if (ctx->state != state)
1717 continue;
1718 get_nfs_open_context(ctx);
1719 spin_unlock(&state->inode->i_lock);
1720 return ctx;
1721 }
1722 spin_unlock(&state->inode->i_lock);
1723 return ERR_PTR(-ENOENT);
1724}
1725
4a1c0893
TM		 1726static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1727 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1728{
1729 struct nfs4_opendata *opendata;
1730
4a1c0893 1731 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1775fd3e 1732 NULL, NULL, claim, GFP_NOFS);
6f220ed5
TM		 1733 if (opendata == NULL)
1734 return ERR_PTR(-ENOMEM);
1735 opendata->state = state;
1736 atomic_inc(&state->count);
1737 return opendata;
1738}
1739
24311f88
TM		 1740static int nfs4_open_recover_helper(struct nfs4_opendata *opendata,
1741 fmode_t fmode)
864472e9 1742{
2ced46c2 1743 struct nfs4_state *newstate;
864472e9
TM		 1744 int ret;
1745
24311f88 1746 if (!nfs4_mode_match_open_stateid(opendata->state, fmode))
39f897fd 1747 return 0;
dc0b027d
TM		 1748 opendata->o_arg.open_flags = 0;
1749 opendata->o_arg.fmode = fmode;
be36e185
TM		 1750 opendata->o_arg.share_access = nfs4_map_atomic_open_share(
1751 NFS_SB(opendata->dentry->d_sb),
1752 fmode, 0);
2ced46c2
TM		 1753 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1754 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1755 nfs4_init_opendata_res(opendata);
b257957e 1756 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1757 if (ret != 0)
1758 return ret;
2ced46c2 1759 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1760 if (IS_ERR(newstate))
1761 return PTR_ERR(newstate);
24311f88
TM		 1762 if (newstate != opendata->state)
1763 ret = -ESTALE;
643168c2 1764 nfs4_close_state(newstate, fmode);
24311f88 1765 return ret;
864472e9
TM		 1766}
1767
1768static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1769{
864472e9
TM		 1770 int ret;
1771
4f14c194
TM		 1772 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */
1773 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1774 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1775 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
864472e9 1776 /* memory barrier prior to reading state->n_* */
2ced46c2 1777 clear_bit(NFS_DELEGATED_STATE, &state->flags);
fd068b20 1778 clear_bit(NFS_OPEN_STATE, &state->flags);
864472e9 1779 smp_rmb();
24311f88
TM		 1780 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
1781 if (ret != 0)
1782 return ret;
1783 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE);
1784 if (ret != 0)
1785 return ret;
1786 ret = nfs4_open_recover_helper(opendata, FMODE_READ);
1787 if (ret != 0)
1788 return ret;
1ac7e2fd
TM		 1789 /*
1790 * We may have performed cached opens for all three recoveries.
1791 * Check if we need to update the current stateid.
1792 */
1793 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1794 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1795 write_seqlock(&state->seqlock);
1ac7e2fd 1796 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1797 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1798 write_sequnlock(&state->seqlock);
1ac7e2fd 1799 }
864472e9
TM		 1800 return 0;
1801}
1802
1da177e4
LT		 1803/*
1804 * OPEN_RECLAIM:
1805 * reclaim state on the server after a reboot.
1da177e4 1806 */
539cd03a 1807static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1808{
1ac7e2fd 1809 struct nfs_delegation *delegation;
864472e9 1810 struct nfs4_opendata *opendata;
dc0b027d 1811 fmode_t delegation_type = 0;
1da177e4
LT		 1812 int status;
1813
4a1c0893
TM		 1814 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1815 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1816 if (IS_ERR(opendata))
1817 return PTR_ERR(opendata);
1ac7e2fd
TM		 1818 rcu_read_lock();
1819 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1820 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1821 delegation_type = delegation->type;
1ac7e2fd 1822 rcu_read_unlock();
864472e9
TM		 1823 opendata->o_arg.u.delegation_type = delegation_type;
1824 status = nfs4_open_recover(opendata, state);
c6d00e63 1825 nfs4_opendata_put(opendata);
1da177e4
LT		 1826 return status;
1827}
1828
539cd03a 1829static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1830{
1831 struct nfs_server *server = NFS_SERVER(state->inode);
1832 struct nfs4_exception exception = { };
1833 int err;
1834 do {
539cd03a 1835 err = _nfs4_do_open_reclaim(ctx, state);
42113a75 1836 trace_nfs4_open_reclaim(ctx, 0, err);
49f9a0fa
TM		 1837 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1838 continue;
168667c4 1839 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1840 break;
1841 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1842 } while (exception.retry);
1843 return err;
1844}
1845
864472e9
TM		 1846static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1847{
1848 struct nfs_open_context *ctx;
1849 int ret;
1850
1851 ctx = nfs4_state_find_open_context(state);
1852 if (IS_ERR(ctx))
91876b13 1853 return -EAGAIN;
539cd03a 1854 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1855 put_nfs_open_context(ctx);
1856 return ret;
1857}
1858
db4f2e63 1859static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1da177e4 1860{
be76b5b6
TM		 1861 switch (err) {
1862 default:
1863 printk(KERN_ERR "NFS: %s: unhandled error "
1864 "%d.\n", __func__, err);
1865 case 0:
1866 case -ENOENT:
8eee52af 1867 case -EAGAIN:
be76b5b6
TM		 1868 case -ESTALE:
1869 break;
1870 case -NFS4ERR_BADSESSION:
1871 case -NFS4ERR_BADSLOT:
1872 case -NFS4ERR_BAD_HIGH_SLOT:
1873 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1874 case -NFS4ERR_DEADSESSION:
1875 set_bit(NFS_DELEGATED_STATE, &state->flags);
1876 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1877 return -EAGAIN;
1878 case -NFS4ERR_STALE_CLIENTID:
1879 case -NFS4ERR_STALE_STATEID:
1880 set_bit(NFS_DELEGATED_STATE, &state->flags);
be76b5b6
TM		 1881 /* Don't recall a delegation if it was lost */
1882 nfs4_schedule_lease_recovery(server->nfs_client);
1883 return -EAGAIN;
352297b9
CL		 1884 case -NFS4ERR_MOVED:
1885 nfs4_schedule_migration_recovery(server);
1886 return -EAGAIN;
8ef2f8d4
CL		 1887 case -NFS4ERR_LEASE_MOVED:
1888 nfs4_schedule_lease_moved_recovery(server->nfs_client);
1889 return -EAGAIN;
be76b5b6
TM		 1890 case -NFS4ERR_DELEG_REVOKED:
1891 case -NFS4ERR_ADMIN_REVOKED:
404ea356 1892 case -NFS4ERR_EXPIRED:
be76b5b6 1893 case -NFS4ERR_BAD_STATEID:
db4f2e63 1894 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 1895 nfs_inode_find_state_and_recover(state->inode,
1896 stateid);
1897 nfs4_schedule_stateid_recovery(server, state);
869f9dfa 1898 return -EAGAIN;
be76b5b6
TM		 1899 case -NFS4ERR_DELAY:
1900 case -NFS4ERR_GRACE:
1901 set_bit(NFS_DELEGATED_STATE, &state->flags);
1902 ssleep(1);
1903 return -EAGAIN;
db4f2e63
TM		 1904 case -ENOMEM:
1905 case -NFS4ERR_DENIED:
1906 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1907 return 0;
be76b5b6 1908 }
1da177e4
LT		 1909 return err;
1910}
1911
24311f88
TM		 1912int nfs4_open_delegation_recall(struct nfs_open_context *ctx,
1913 struct nfs4_state *state, const nfs4_stateid *stateid,
1914 fmode_t type)
db4f2e63
TM		 1915{
1916 struct nfs_server *server = NFS_SERVER(state->inode);
1917 struct nfs4_opendata *opendata;
24311f88 1918 int err = 0;
db4f2e63
TM		 1919
1920 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1921 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1922 if (IS_ERR(opendata))
1923 return PTR_ERR(opendata);
1924 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
5e99b532
JL		 1925 write_seqlock(&state->seqlock);
1926 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1927 write_sequnlock(&state->seqlock);
24311f88
TM		 1928 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1929 switch (type & (FMODE_READ|FMODE_WRITE)) {
1930 case FMODE_READ|FMODE_WRITE:
1931 case FMODE_WRITE:
1932 err = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
1933 if (err)
1934 break;
1935 err = nfs4_open_recover_helper(opendata, FMODE_WRITE);
1936 if (err)
1937 break;
1938 case FMODE_READ:
1939 err = nfs4_open_recover_helper(opendata, FMODE_READ);
1940 }
db4f2e63
TM		 1941 nfs4_opendata_put(opendata);
1942 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1943}
1944
be05c860
CL		 1945static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1946{
1947 struct nfs4_opendata *data = calldata;
1948
7981c8a6
AS		 1949 nfs4_setup_sequence(data->o_arg.server->nfs_client,
1950 &data->c_arg.seq_args, &data->c_res.seq_res, task);
be05c860
CL		 1951}
1952
cdd4e68b
TM		 1953static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1954{
1955 struct nfs4_opendata *data = calldata;
1956
17ead6c8 1957 nfs40_sequence_done(task, &data->c_res.seq_res);
be05c860 1958
cdd4e68b 1959 data->rpc_status = task->tk_status;
26e976a8 1960 if (data->rpc_status == 0) {
f597c537 1961 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1962 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1963 renew_lease(data->o_res.server, data->timestamp);
3e309914 1964 data->rpc_done = 1;
26e976a8 1965 }
cdd4e68b
TM		 1966}
1967
1968static void nfs4_open_confirm_release(void *calldata)
1969{
1970 struct nfs4_opendata *data = calldata;
1971 struct nfs4_state *state = NULL;
1972
1973 /* If this request hasn't been cancelled, do nothing */
1974 if (data->cancelled == 0)
1975 goto out_free;
1976 /* In case of error, no cleanup! */
3e309914 1977 if (!data->rpc_done)
cdd4e68b 1978 goto out_free;
cdd4e68b 1979 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1980 if (!IS_ERR(state))
643168c2 1981 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1982out_free:
c6d00e63 1983 nfs4_opendata_put(data);
cdd4e68b
TM		 1984}
1985
1986static const struct rpc_call_ops nfs4_open_confirm_ops = {
be05c860 1987 .rpc_call_prepare = nfs4_open_confirm_prepare,
cdd4e68b
TM		 1988 .rpc_call_done = nfs4_open_confirm_done,
1989 .rpc_release = nfs4_open_confirm_release,
1990};
1991
1992/*
1993 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1994 */
1995static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1996{
2b0143b5 1997 struct nfs_server *server = NFS_SERVER(d_inode(data->dir));
cdd4e68b 1998 struct rpc_task *task;
5138fde0
TM		 1999 struct rpc_message msg = {
2000 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
2001 .rpc_argp = &data->c_arg,
2002 .rpc_resp = &data->c_res,
2003 .rpc_cred = data->owner->so_cred,
2004 };
c970aa85
TM		 2005 struct rpc_task_setup task_setup_data = {
2006 .rpc_client = server->client,
5138fde0 2007 .rpc_message = &msg,
c970aa85
TM		 2008 .callback_ops = &nfs4_open_confirm_ops,
2009 .callback_data = data,
101070ca 2010 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2011 .flags = RPC_TASK_ASYNC,
2012 };
1da177e4
LT		 2013 int status;
2014
17ead6c8 2015 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1);
c6d00e63 2016 kref_get(&data->kref);
3e309914
TM		 2017 data->rpc_done = 0;
2018 data->rpc_status = 0;
5138fde0 2019 data->timestamp = jiffies;
e92c1e0d
BC		 2020 if (data->is_recover)
2021 nfs4_set_sequence_privileged(&data->c_arg.seq_args);
c970aa85 2022 task = rpc_run_task(&task_setup_data);
7a1218a2 2023 if (IS_ERR(task))
cdd4e68b 2024 return PTR_ERR(task);
820bf85c 2025 status = rpc_wait_for_completion_task(task);
cdd4e68b
TM		 2026 if (status != 0) {
2027 data->cancelled = 1;
2028 smp_wmb();
2029 } else
2030 status = data->rpc_status;
e6b3c4db 2031 rpc_put_task(task);
1da177e4
LT		 2032 return status;
2033}
2034
24ac23ab 2035static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 2036{
24ac23ab
TM		 2037 struct nfs4_opendata *data = calldata;
2038 struct nfs4_state_owner *sp = data->owner;
549b19cc 2039 struct nfs_client *clp = sp->so_server->nfs_client;
2a606188 2040 enum open_claim_type4 claim = data->o_arg.claim;
5138fde0 2041
24ac23ab 2042 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 2043 goto out_wait;
aac00a8d
TM		 2044 /*
2045 * Check if we still need to send an OPEN call, or if we can use
2046 * a delegation instead.
2047 */
2048 if (data->state != NULL) {
2049 struct nfs_delegation *delegation;
2050
dc0b027d 2051 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 2052 goto out_no_action;
aac00a8d
TM		 2053 rcu_read_lock();
2054 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
2a606188 2055 if (can_open_delegated(delegation, data->o_arg.fmode, claim))
652f89f6 2056 goto unlock_no_action;
aac00a8d
TM		 2057 rcu_read_unlock();
2058 }
95b72eb0 2059 /* Update client id. */
549b19cc 2060 data->o_arg.clientid = clp->cl_clientid;
2a606188
TM		 2061 switch (claim) {
2062 default:
2063 break;
8188df17
TM		 2064 case NFS4_OPEN_CLAIM_PREVIOUS:
2065 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
2066 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 2067 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
8188df17
TM		 2068 case NFS4_OPEN_CLAIM_FH:
2069 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 2070 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
2071 }
26e976a8 2072 data->timestamp = jiffies;
42e1cca7 2073 if (nfs4_setup_sequence(data->o_arg.server->nfs_client,
d898528c 2074 &data->o_arg.seq_args,
2240a9e2
TM		 2075 &data->o_res.seq_res,
2076 task) != 0)
2077 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 2078
2079 /* Set the create mode (note dependency on the session type) */
2080 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
2081 if (data->o_arg.open_flags & O_EXCL) {
2082 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
2083 if (nfs4_has_persistent_session(clp))
2084 data->o_arg.createmode = NFS4_CREATE_GUARDED;
2085 else if (clp->cl_mvops->minor_version > 0)
2086 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
2087 }
6ee41268 2088 return;
652f89f6 2089unlock_no_action:
9759b0fb 2090 trace_nfs4_cached_open(data->state);
652f89f6 2091 rcu_read_unlock();
6ee41268
TM		 2092out_no_action:
2093 task->tk_action = NULL;
c8da19b9 2094out_wait:
b75ad4cd 2095 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 2096}
2097
24ac23ab
TM		 2098static void nfs4_open_done(struct rpc_task *task, void *calldata)
2099{
2100 struct nfs4_opendata *data = calldata;
1da177e4 2101
24ac23ab 2102 data->rpc_status = task->tk_status;
d898528c 2103
2e80dbe7 2104 if (!nfs4_sequence_process(task, &data->o_res.seq_res))
14516c3a 2105 return;
d898528c 2106
24ac23ab 2107 if (task->tk_status == 0) {
807d66d8
TM		 2108 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
2109 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 2110 case S_IFREG:
2111 break;
2112 case S_IFLNK:
24ac23ab 2113 data->rpc_status = -ELOOP;
6f926b5b
TM		 2114 break;
2115 case S_IFDIR:
24ac23ab 2116 data->rpc_status = -EISDIR;
6f926b5b
TM		 2117 break;
2118 default:
24ac23ab 2119 data->rpc_status = -ENOTDIR;
807d66d8 2120 }
6f926b5b 2121 }
26e976a8 2122 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 2123 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
2124 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 2125 }
3e309914 2126 data->rpc_done = 1;
24ac23ab 2127}
6f926b5b 2128
24ac23ab
TM		 2129static void nfs4_open_release(void *calldata)
2130{
2131 struct nfs4_opendata *data = calldata;
2132 struct nfs4_state *state = NULL;
2133
2134 /* If this request hasn't been cancelled, do nothing */
2135 if (data->cancelled == 0)
2136 goto out_free;
2137 /* In case of error, no cleanup! */
3e309914 2138 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 2139 goto out_free;
2140 /* In case we need an open_confirm, no cleanup! */
2141 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
2142 goto out_free;
24ac23ab 2143 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 2144 if (!IS_ERR(state))
643168c2 2145 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 2146out_free:
c6d00e63 2147 nfs4_opendata_put(data);
24ac23ab
TM		 2148}
2149
2150static const struct rpc_call_ops nfs4_open_ops = {
2151 .rpc_call_prepare = nfs4_open_prepare,
2152 .rpc_call_done = nfs4_open_done,
2153 .rpc_release = nfs4_open_release,
2154};
2155
b257957e 2156static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab 2157{
2b0143b5 2158 struct inode *dir = d_inode(data->dir);
24ac23ab
TM		 2159 struct nfs_server *server = NFS_SERVER(dir);
2160 struct nfs_openargs *o_arg = &data->o_arg;
2161 struct nfs_openres *o_res = &data->o_res;
2162 struct rpc_task *task;
5138fde0
TM		 2163 struct rpc_message msg = {
2164 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
2165 .rpc_argp = o_arg,
2166 .rpc_resp = o_res,
2167 .rpc_cred = data->owner->so_cred,
2168 };
c970aa85
TM		 2169 struct rpc_task_setup task_setup_data = {
2170 .rpc_client = server->client,
5138fde0 2171 .rpc_message = &msg,
c970aa85
TM		 2172 .callback_ops = &nfs4_open_ops,
2173 .callback_data = data,
101070ca 2174 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2175 .flags = RPC_TASK_ASYNC,
2176 };
24ac23ab
TM		 2177 int status;
2178
a9c92d6b 2179 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 2180 kref_get(&data->kref);
3e309914
TM		 2181 data->rpc_done = 0;
2182 data->rpc_status = 0;
2ced46c2 2183 data->cancelled = 0;
bdeca1b7
TM		 2184 data->is_recover = 0;
2185 if (isrecover) {
8fe72bac 2186 nfs4_set_sequence_privileged(&o_arg->seq_args);
bdeca1b7
TM		 2187 data->is_recover = 1;
2188 }
c970aa85 2189 task = rpc_run_task(&task_setup_data);
d9b67e1e
AS		 2190 if (IS_ERR(task))
2191 return PTR_ERR(task);
820bf85c 2192 status = rpc_wait_for_completion_task(task);
d9b67e1e
AS		 2193 if (status != 0) {
2194 data->cancelled = 1;
2195 smp_wmb();
2196 } else
2197 status = data->rpc_status;
2198 rpc_put_task(task);
b257957e
AB		 2199
2200 return status;
2201}
2202
2203static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
2204{
2b0143b5 2205 struct inode *dir = d_inode(data->dir);
b257957e 2206 struct nfs_openres *o_res = &data->o_res;
d9b67e1e 2207 int status;
b257957e
AB		 2208
2209 status = nfs4_run_open_task(data, 1);
2210 if (status != 0 || !data->rpc_done)
2211 return status;
2212
6926afd1
TM		 2213 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
2214
d7e98258 2215 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM)
b257957e 2216 status = _nfs4_proc_open_confirm(data);
b257957e
AB		 2217
2218 return status;
2219}
2220
f3792d63
TM		 2221/*
2222 * Additional permission checks in order to distinguish between an
2223 * open for read, and an open for execute. This works around the
2224 * fact that NFSv4 OPEN treats read and execute permissions as being
2225 * the same.
2226 * Note that in the non-execute case, we want to turn off permission
2227 * checking if we just created a new file (POSIX open() semantics).
2228 */
6168f62c
WAA		 2229static int nfs4_opendata_access(struct rpc_cred *cred,
2230 struct nfs4_opendata *opendata,
f8d9a897
WAA		 2231 struct nfs4_state *state, fmode_t fmode,
2232 int openflags)
6168f62c
WAA		 2233{
2234 struct nfs_access_entry cache;
2235 u32 mask;
2236
2237 /* access call failed or for some reason the server doesn't
2238 * support any access modes -- defer access call until later */
2239 if (opendata->o_res.access_supported == 0)
2240 return 0;
2241
2242 mask = 0;
f3792d63
TM		 2243 /*
2244 * Use openflags to check for exec, because fmode won't
2245 * always have FMODE_EXEC set when file open for exec.
2246 */
f8d9a897
WAA		 2247 if (openflags & __FMODE_EXEC) {
2248 /* ONLY check for exec rights */
2249 mask = MAY_EXEC;
f3792d63 2250 } else if ((fmode & FMODE_READ) && !opendata->file_created)
f8d9a897 2251 mask = MAY_READ;
6168f62c
WAA		 2252
2253 cache.cred = cred;
2254 cache.jiffies = jiffies;
2255 nfs_access_set_mask(&cache, opendata->o_res.access_result);
2256 nfs_access_add_cache(state->inode, &cache);
2257
bbd3a8ee 2258 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 2259 return 0;
2260
998f40b5 2261 return -EACCES;
6168f62c
WAA		 2262}
2263
b257957e
AB		 2264/*
2265 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2266 */
2267static int _nfs4_proc_open(struct nfs4_opendata *data)
2268{
2b0143b5 2269 struct inode *dir = d_inode(data->dir);
b257957e
AB		 2270 struct nfs_server *server = NFS_SERVER(dir);
2271 struct nfs_openargs *o_arg = &data->o_arg;
2272 struct nfs_openres *o_res = &data->o_res;
2273 int status;
2274
2275 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 2276 if (!data->rpc_done)
2277 return status;
2278 if (status != 0) {
2279 if (status == -NFS4ERR_BADNAME &&
2280 !(o_arg->open_flags & O_CREAT))
2281 return -ENOENT;
24ac23ab 2282 return status;
08ef7bd3 2283 }
24ac23ab 2284
6926afd1
TM		 2285 nfs_fattr_map_and_free_names(server, &data->f_attr);
2286
5bc2afc2 2287 if (o_arg->open_flags & O_CREAT) {
5bc2afc2
TM		 2288 if (o_arg->open_flags & O_EXCL)
2289 data->file_created = 1;
2290 else if (o_res->cinfo.before != o_res->cinfo.after)
2291 data->file_created = 1;
2dfc6173 2292 if (data->file_created || dir->i_version != o_res->cinfo.after)
d3129ef6
TM		 2293 update_changeattr(dir, &o_res->cinfo,
2294 o_res->f_attr->time_start);
5bc2afc2 2295 }
0df5dd4a
TM		 2296 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2297 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 2298 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 2299 status = _nfs4_proc_open_confirm(data);
1da177e4 2300 if (status != 0)
24ac23ab 2301 return status;
1da177e4
LT		 2302 }
2303 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
8935ef66 2304 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
24ac23ab 2305 return 0;
1da177e4
LT		 2306}
2307
1da177e4
LT		 2308/*
2309 * OPEN_EXPIRED:
2310 * reclaim state on the server after a network partition.
2311 * Assumes caller holds the appropriate lock
2312 */
539cd03a 2313static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 2314{
e56e0b78 2315 struct nfs4_opendata *opendata;
864472e9 2316 int ret;
1da177e4 2317
4a1c0893 2318 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 2319 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 2320 if (IS_ERR(opendata))
2321 return PTR_ERR(opendata);
864472e9 2322 ret = nfs4_open_recover(opendata, state);
35d05778 2323 if (ret == -ESTALE)
3d4ff43d 2324 d_drop(ctx->dentry);
c6d00e63 2325 nfs4_opendata_put(opendata);
864472e9 2326 return ret;
1da177e4
LT		 2327}
2328
a9ed2e25 2329static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 2330{
539cd03a 2331 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 2332 struct nfs4_exception exception = { };
2333 int err;
2334
2335 do {
539cd03a 2336 err = _nfs4_open_expired(ctx, state);
42113a75 2337 trace_nfs4_open_expired(ctx, 0, err);
49f9a0fa
TM		 2338 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2339 continue;
a9ed2e25
TM		 2340 switch (err) {
2341 default:
2342 goto out;
2343 case -NFS4ERR_GRACE:
2344 case -NFS4ERR_DELAY:
2345 nfs4_handle_exception(server, err, &exception);
2346 err = 0;
2347 }
202b50dc 2348 } while (exception.retry);
a9ed2e25 2349out:
202b50dc
TM		 2350 return err;
2351}
2352
1da177e4
LT		 2353static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2354{
1da177e4 2355 struct nfs_open_context *ctx;
864472e9 2356 int ret;
1da177e4 2357
864472e9
TM		 2358 ctx = nfs4_state_find_open_context(state);
2359 if (IS_ERR(ctx))
91876b13 2360 return -EAGAIN;
539cd03a 2361 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 2362 put_nfs_open_context(ctx);
2363 return ret;
1da177e4
LT		 2364}
2365
41020b67
TM		 2366static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state,
2367 const nfs4_stateid *stateid)
4dfd4f7a 2368{
41020b67 2369 nfs_remove_bad_delegation(state->inode, stateid);
4dfd4f7a
TM		 2370 write_seqlock(&state->seqlock);
2371 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2372 write_sequnlock(&state->seqlock);
2373 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2374}
2375
2376static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
2377{
2378 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
41020b67 2379 nfs_finish_clear_delegation_stateid(state, NULL);
4dfd4f7a
TM		 2380}
2381
2382static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2383{
2384 /* NFSv4.0 doesn't allow for delegation recovery on open expire */
2385 nfs40_clear_delegation_stateid(state);
2386 return nfs4_open_expired(sp, state);
2387}
2388
45870d69
TM		 2389static int nfs40_test_and_free_expired_stateid(struct nfs_server *server,
2390 nfs4_stateid *stateid,
2391 struct rpc_cred *cred)
2392{
2393 return -NFS4ERR_BAD_STATEID;
2394}
2395
f062eb6c 2396#if defined(CONFIG_NFS_V4_1)
4586f6e2
TM		 2397static int nfs41_test_and_free_expired_stateid(struct nfs_server *server,
2398 nfs4_stateid *stateid,
2399 struct rpc_cred *cred)
2400{
2401 int status;
2402
f7a62ada
TM		 2403 switch (stateid->type) {
2404 default:
2405 break;
2406 case NFS4_INVALID_STATEID_TYPE:
2407 case NFS4_SPECIAL_STATEID_TYPE:
2408 return -NFS4ERR_BAD_STATEID;
2409 case NFS4_REVOKED_STATEID_TYPE:
2410 goto out_free;
2411 }
4586f6e2 2412
f7a62ada 2413 status = nfs41_test_stateid(server, stateid, cred);
4586f6e2
TM		 2414 switch (status) {
2415 case -NFS4ERR_EXPIRED:
2416 case -NFS4ERR_ADMIN_REVOKED:
2417 case -NFS4ERR_DELEG_REVOKED:
f7a62ada
TM		 2418 break;
2419 default:
4586f6e2
TM		 2420 return status;
2421 }
f7a62ada
TM		 2422out_free:
2423 /* Ack the revoked state to the server */
f0b0bf88 2424 nfs41_free_stateid(server, stateid, cred, true);
f7a62ada 2425 return -NFS4ERR_EXPIRED;
4586f6e2
TM		 2426}
2427
0c116cad 2428static void nfs41_check_delegation_stateid(struct nfs4_state *state)
f062eb6c 2429{
f062eb6c 2430 struct nfs_server *server = NFS_SERVER(state->inode);
0c116cad 2431 nfs4_stateid stateid;
ab7cb0df 2432 struct nfs_delegation *delegation;
0c116cad
TM		 2433 struct rpc_cred *cred;
2434 int status;
3e60ffdd 2435
ab7cb0df
TM		 2436 /* Get the delegation credential for use by test/free_stateid */
2437 rcu_read_lock();
2438 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
0c116cad 2439 if (delegation == NULL) {
ab7cb0df 2440 rcu_read_unlock();
0c116cad
TM		 2441 return;
2442 }
2443
2444 nfs4_stateid_copy(&stateid, &delegation->stateid);
0e3d3e5d
OK		 2445 if (test_bit(NFS_DELEGATION_REVOKED, &delegation->flags) ||
2446 !test_and_clear_bit(NFS_DELEGATION_TEST_EXPIRED,
2447 &delegation->flags)) {
4c8e5447 2448 rcu_read_unlock();
41020b67 2449 nfs_finish_clear_delegation_stateid(state, &stateid);
4c8e5447
TM		 2450 return;
2451 }
0c116cad 2452
0c116cad
TM		 2453 cred = get_rpccred(delegation->cred);
2454 rcu_read_unlock();
4586f6e2 2455 status = nfs41_test_and_free_expired_stateid(server, &stateid, cred);
0c116cad 2456 trace_nfs4_test_delegation_stateid(state, NULL, status);
f7a62ada 2457 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID)
41020b67 2458 nfs_finish_clear_delegation_stateid(state, &stateid);
ab7cb0df 2459
0c116cad 2460 put_rpccred(cred);
3e60ffdd
CL		 2461}
2462
c5896fc8
TM		 2463/**
2464 * nfs41_check_expired_locks - possibly free a lock stateid
2465 *
2466 * @state: NFSv4 state for an inode
2467 *
2468 * Returns NFS_OK if recovery for this stateid is now finished.
2469 * Otherwise a negative NFS4ERR value is returned.
2470 */
2471static int nfs41_check_expired_locks(struct nfs4_state *state)
2472{
2473 int status, ret = NFS_OK;
d75a6a0e 2474 struct nfs4_lock_state *lsp, *prev = NULL;
c5896fc8
TM		 2475 struct nfs_server *server = NFS_SERVER(state->inode);
2476
2477 if (!test_bit(LK_STATE_IN_USE, &state->flags))
2478 goto out;
d75a6a0e
BC		 2479
2480 spin_lock(&state->state_lock);
c5896fc8
TM		 2481 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
2482 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
2483 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
2484
d75a6a0e
BC		 2485 atomic_inc(&lsp->ls_count);
2486 spin_unlock(&state->state_lock);
2487
2488 nfs4_put_lock_state(prev);
2489 prev = lsp;
2490
c5896fc8
TM		 2491 status = nfs41_test_and_free_expired_stateid(server,
2492 &lsp->ls_stateid,
2493 cred);
2494 trace_nfs4_test_lock_stateid(state, lsp, status);
2495 if (status == -NFS4ERR_EXPIRED ||
2496 status == -NFS4ERR_BAD_STATEID) {
2497 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
67dd4830 2498 lsp->ls_stateid.type = NFS4_INVALID_STATEID_TYPE;
c5896fc8
TM		 2499 if (!recover_lost_locks)
2500 set_bit(NFS_LOCK_LOST, &lsp->ls_flags);
2501 } else if (status != NFS_OK) {
2502 ret = status;
d75a6a0e
BC		 2503 nfs4_put_lock_state(prev);
2504 goto out;
c5896fc8 2505 }
d75a6a0e 2506 spin_lock(&state->state_lock);
c5896fc8 2507 }
d75a6a0e
BC		 2508 }
2509 spin_unlock(&state->state_lock);
2510 nfs4_put_lock_state(prev);
c5896fc8
TM		 2511out:
2512 return ret;
2513}
2514
3e60ffdd
CL		 2515/**
2516 * nfs41_check_open_stateid - possibly free an open stateid
2517 *
2518 * @state: NFSv4 state for an inode
2519 *
2520 * Returns NFS_OK if recovery for this stateid is now finished.
2521 * Otherwise a negative NFS4ERR value is returned.
2522 */
2523static int nfs41_check_open_stateid(struct nfs4_state *state)
2524{
2525 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 2526 nfs4_stateid *stateid = &state->open_stateid;
ab7cb0df 2527 struct rpc_cred *cred = state->owner->so_cred;
3e60ffdd
CL		 2528 int status;
2529
b134fc4a 2530 if (test_bit(NFS_OPEN_STATE, &state->flags) == 0) {
8a64c4ef
TM		 2531 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) {
2532 if (nfs4_have_delegation(state->inode, state->state))
2533 return NFS_OK;
2534 return -NFS4ERR_OPENMODE;
2535 }
3e60ffdd 2536 return -NFS4ERR_BAD_STATEID;
b134fc4a 2537 }
4586f6e2 2538 status = nfs41_test_and_free_expired_stateid(server, stateid, cred);
08cb47fa 2539 trace_nfs4_test_open_stateid(state, NULL, status);
f7a62ada 2540 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID) {
3e60ffdd
CL		 2541 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2542 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2543 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 2544 clear_bit(NFS_OPEN_STATE, &state->flags);
67dd4830 2545 stateid->type = NFS4_INVALID_STATEID_TYPE;
b01dd1d8 2546 }
8a64c4ef
TM		 2547 if (status != NFS_OK)
2548 return status;
2549 if (nfs_open_stateid_recover_openmode(state))
2550 return -NFS4ERR_OPENMODE;
2551 return NFS_OK;
b01dd1d8
BS		 2552}
2553
2554static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2555{
eb64cf96 2556 int status;
b01dd1d8 2557
0c116cad 2558 nfs41_check_delegation_stateid(state);
c5896fc8
TM		 2559 status = nfs41_check_expired_locks(state);
2560 if (status != NFS_OK)
2561 return status;
3e60ffdd 2562 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 2563 if (status != NFS_OK)
2564 status = nfs4_open_expired(sp, state);
2565 return status;
f062eb6c
BS		 2566}
2567#endif
2568
aa53ed54
JL		 2569/*
2570 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2571 * fields corresponding to attributes that were used to store the verifier.
2572 * Make sure we clobber those fields in the later setattr call
2573 */
5334c5bd
KM		 2574static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata,
2575 struct iattr *sattr, struct nfs4_label **label)
aa53ed54 2576{
5334c5bd
KM		 2577 const u32 *attrset = opendata->o_res.attrset;
2578
2579 if ((attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
aa53ed54
JL		 2580 !(sattr->ia_valid & ATTR_ATIME_SET))
2581 sattr->ia_valid |= ATTR_ATIME;
2582
5334c5bd 2583 if ((attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
aa53ed54
JL		 2584 !(sattr->ia_valid & ATTR_MTIME_SET))
2585 sattr->ia_valid |= ATTR_MTIME;
5334c5bd
KM		 2586
2587 /* Except MODE, it seems harmless of setting twice. */
a430607b
BC		 2588 if (opendata->o_arg.createmode != NFS4_CREATE_EXCLUSIVE &&
2589 attrset[1] & FATTR4_WORD1_MODE)
5334c5bd
KM		 2590 sattr->ia_valid &= ~ATTR_MODE;
2591
2592 if (attrset[2] & FATTR4_WORD2_SECURITY_LABEL)
2593 *label = NULL;
aa53ed54
JL		 2594}
2595
c21443c2
TM		 2596static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2597 fmode_t fmode,
2598 int flags,
3efb9722 2599 struct nfs_open_context *ctx)
c21443c2
TM		 2600{
2601 struct nfs4_state_owner *sp = opendata->owner;
2602 struct nfs_server *server = sp->so_server;
275bb307 2603 struct dentry *dentry;
c21443c2
TM		 2604 struct nfs4_state *state;
2605 unsigned int seq;
2606 int ret;
2607
2608 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2609
2610 ret = _nfs4_proc_open(opendata);
dca78001 2611 if (ret != 0)
c21443c2
TM		 2612 goto out;
2613
2614 state = nfs4_opendata_to_nfs4_state(opendata);
2615 ret = PTR_ERR(state);
2616 if (IS_ERR(state))
2617 goto out;
a974deee 2618 ctx->state = state;
c21443c2
TM		 2619 if (server->caps & NFS_CAP_POSIX_LOCK)
2620 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
a8ce377a
JL		 2621 if (opendata->o_res.rflags & NFS4_OPEN_RESULT_MAY_NOTIFY_LOCK)
2622 set_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags);
c21443c2 2623
275bb307 2624 dentry = opendata->dentry;
2b0143b5 2625 if (d_really_is_negative(dentry)) {
668d0cd5 2626 struct dentry *alias;
275bb307 2627 d_drop(dentry);
668d0cd5
AV		 2628 alias = d_exact_alias(dentry, state->inode);
2629 if (!alias)
2630 alias = d_splice_alias(igrab(state->inode), dentry);
2631 /* d_splice_alias() can't fail here - it's a non-directory */
2632 if (alias) {
275bb307 2633 dput(ctx->dentry);
668d0cd5 2634 ctx->dentry = dentry = alias;
275bb307
TM		 2635 }
2636 nfs_set_verifier(dentry,
2b0143b5 2637 nfs_save_change_attribute(d_inode(opendata->dir)));
275bb307
TM		 2638 }
2639
c21443c2
TM		 2640 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2641 if (ret != 0)
2642 goto out;
2643
2b0143b5 2644 if (d_inode(dentry) == state->inode) {
c45ffdd2
TM		 2645 nfs_inode_attach_open_context(ctx);
2646 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2647 nfs4_schedule_stateid_recovery(server, state);
2648 }
c21443c2
TM		 2649out:
2650 return ret;
2651}
2652
1da177e4 2653/*
24ac23ab 2654 * Returns a referenced nfs4_state
1da177e4 2655 */
82be417a 2656static int _nfs4_do_open(struct inode *dir,
4197a055 2657 struct nfs_open_context *ctx,
82be417a
AA		 2658 int flags,
2659 struct iattr *sattr,
5bc2afc2
TM		 2660 struct nfs4_label *label,
2661 int *opened)
1da177e4
LT		 2662{
2663 struct nfs4_state_owner *sp;
2664 struct nfs4_state *state = NULL;
2665 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 2666 struct nfs4_opendata *opendata;
4197a055
TM		 2667 struct dentry *dentry = ctx->dentry;
2668 struct rpc_cred *cred = ctx->cred;
2669 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2670 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
49f9a0fa 2671 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
1775fd3e 2672 struct nfs4_label *olabel = NULL;
aac00a8d 2673 int status;
1da177e4
LT		 2674
2675 /* Protect against reboot recovery conflicts */
1da177e4 2676 status = -ENOMEM;
d1e284d5
TM		 2677 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2678 if (sp == NULL) {
1da177e4
LT		 2679 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2680 goto out_err;
2681 }
334f87dd 2682 status = nfs4_client_recover_expired_lease(server->nfs_client);
58d9714a 2683 if (status != 0)
b4454fe1 2684 goto err_put_state_owner;
2b0143b5
DH		 2685 if (d_really_is_positive(dentry))
2686 nfs4_return_incompatible_delegation(d_inode(dentry), fmode);
58d9714a 2687 status = -ENOMEM;
2b0143b5 2688 if (d_really_is_positive(dentry))
49f9a0fa 2689 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2690 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
1775fd3e 2691 label, claim, GFP_KERNEL);
e56e0b78 2692 if (opendata == NULL)
95d35cb4 2693 goto err_put_state_owner;
1da177e4 2694
14c43f76
DQ		 2695 if (label) {
2696 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2697 if (IS_ERR(olabel)) {
2698 status = PTR_ERR(olabel);
2699 goto err_opendata_put;
2700 }
2701 }
2702
e911b815
TM		 2703 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2704 if (!opendata->f_attr.mdsthreshold) {
2705 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2706 if (!opendata->f_attr.mdsthreshold)
2707 goto err_free_label;
2708 }
1549210f 2709 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2710 }
2b0143b5
DH		 2711 if (d_really_is_positive(dentry))
2712 opendata->state = nfs4_get_open_state(d_inode(dentry), sp);
aac00a8d 2713
3efb9722 2714 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
6168f62c 2715 if (status != 0)
14c43f76 2716 goto err_free_label;
3efb9722 2717 state = ctx->state;
6168f62c 2718
efcbc04e 2719 if ((opendata->o_arg.open_flags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) &&
549b19cc 2720 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
5334c5bd 2721 nfs4_exclusive_attrset(opendata, sattr, &label);
a1d1c4f1
TM		 2722 /*
2723 * send create attributes which was not set by open
2724 * with an extra setattr.
2725 */
2726 if (sattr->ia_valid & NFS4_VALID_ATTRS) {
2727 nfs_fattr_init(opendata->o_res.f_attr);
2728 status = nfs4_do_setattr(state->inode, cred,
2729 opendata->o_res.f_attr, sattr,
29b59f94 2730 ctx, label, olabel);
a1d1c4f1
TM		 2731 if (status == 0) {
2732 nfs_setattr_update_inode(state->inode, sattr,
2733 opendata->o_res.f_attr);
2734 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
2735 }
1775fd3e 2736 }
0ab64e0e 2737 }
c5c3fb5f 2738 if (opened && opendata->file_created)
5bc2afc2 2739 *opened |= FILE_CREATED;
82be417a 2740
e911b815 2741 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
82be417a 2742 *ctx_th = opendata->f_attr.mdsthreshold;
e911b815
TM		 2743 opendata->f_attr.mdsthreshold = NULL;
2744 }
82be417a 2745
14c43f76
DQ		 2746 nfs4_label_free(olabel);
2747
c6d00e63 2748 nfs4_opendata_put(opendata);
1da177e4 2749 nfs4_put_state_owner(sp);
1da177e4 2750 return 0;
14c43f76
DQ		 2751err_free_label:
2752 nfs4_label_free(olabel);
c6d00e63
TM		 2753err_opendata_put:
2754 nfs4_opendata_put(opendata);
e56e0b78
TM		 2755err_put_state_owner:
2756 nfs4_put_state_owner(sp);
1da177e4 2757out_err:
1da177e4
LT		 2758 return status;
2759}
2760
2761
82be417a 2762static struct nfs4_state *nfs4_do_open(struct inode *dir,
4197a055 2763 struct nfs_open_context *ctx,
82be417a
AA		 2764 int flags,
2765 struct iattr *sattr,
5bc2afc2
TM		 2766 struct nfs4_label *label,
2767 int *opened)
1da177e4 2768{
49f9a0fa 2769 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2770 struct nfs4_exception exception = { };
2771 struct nfs4_state *res;
2772 int status;
2773
2774 do {
5bc2afc2 2775 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
3efb9722 2776 res = ctx->state;
42113a75 2777 trace_nfs4_open_file(ctx, flags, status);
1da177e4
LT		 2778 if (status == 0)
2779 break;
2780 /* NOTE: BAD_SEQID means the server and client disagree about the
2781 * book-keeping w.r.t. state-changing operations
2782 * (OPEN/CLOSE/LOCK/LOCKU...)
2783 * It is actually a sign of a bug on the client or on the server.
2784 *
2785 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2786 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2787 * have unhashed the old state_owner for us, and that we can
2788 * therefore safely retry using a new one. We should still warn
2789 * the user though...
2790 */
2791 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2792 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2793 " returned a bad sequence-id error!\n",
2794 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2795 exception.retry = 1;
2796 continue;
2797 }
550f5747
TM		 2798 /*
2799 * BAD_STATEID on OPEN means that the server cancelled our
2800 * state before it received the OPEN_CONFIRM.
2801 * Recover by retrying the request as per the discussion
2802 * on Page 181 of RFC3530.
2803 */
2804 if (status == -NFS4ERR_BAD_STATEID) {
2805 exception.retry = 1;
2806 continue;
2807 }
aac00a8d
TM		 2808 if (status == -EAGAIN) {
2809 /* We must have found a delegation */
2810 exception.retry = 1;
2811 continue;
2812 }
49f9a0fa
TM		 2813 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2814 continue;
2815 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2816 status, &exception));
2817 } while (exception.retry);
2818 return res;
2819}
2820
8487c479
TM		 2821static int _nfs4_do_setattr(struct inode *inode,
2822 struct nfs_setattrargs *arg,
2823 struct nfs_setattrres *res,
2824 struct rpc_cred *cred,
29b59f94 2825 struct nfs_open_context *ctx)
1da177e4 2826{
3e4f6290 2827 struct nfs_server *server = NFS_SERVER(inode);
d9b67e1e 2828 struct rpc_message msg = {
659bfcd6 2829 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
8487c479
TM		 2830 .rpc_argp = arg,
2831 .rpc_resp = res,
659bfcd6 2832 .rpc_cred = cred,
d9b67e1e 2833 };
abf4e13c 2834 struct rpc_cred *delegation_cred = NULL;
26e976a8 2835 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2836 fmode_t fmode;
2837 bool truncate;
65e4308d 2838 int status;
1da177e4 2839
8487c479 2840 nfs_fattr_init(res->fattr);
1da177e4 2841
ee3ae84e 2842 /* Servers should only apply open mode checks for file size changes */
8487c479 2843 truncate = (arg->iap->ia_valid & ATTR_SIZE) ? true : false;
ee3ae84e
TM		 2844 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2845
8487c479 2846 if (nfs4_copy_delegation_stateid(inode, fmode, &arg->stateid, &delegation_cred)) {
ee3ae84e 2847 /* Use that stateid */
29b59f94 2848 } else if (truncate && ctx != NULL) {
17393475 2849 struct nfs_lock_context *l_ctx;
29b59f94 2850 if (!nfs4_valid_open_stateid(ctx->state))
0418dae1 2851 return -EBADF;
17393475
N		 2852 l_ctx = nfs_get_lock_context(ctx);
2853 if (IS_ERR(l_ctx))
2854 return PTR_ERR(l_ctx);
7a0566b3
N		 2855 status = nfs4_select_rw_stateid(ctx->state, FMODE_WRITE, l_ctx,
2856 &arg->stateid, &delegation_cred);
2857 nfs_put_lock_context(l_ctx);
2858 if (status == -EIO)
0418dae1 2859 return -EBADF;
08e9eac4 2860 } else
8487c479 2861 nfs4_stateid_copy(&arg->stateid, &zero_stateid);
abf4e13c
TM		 2862 if (delegation_cred)
2863 msg.rpc_cred = delegation_cred;
1da177e4 2864
8487c479 2865 status = nfs4_call_sync(server->client, server, &msg, &arg->seq_args, &res->seq_res, 1);
abf4e13c
TM		 2866
2867 put_rpccred(delegation_cred);
29b59f94 2868 if (status == 0 && ctx != NULL)
26e976a8 2869 renew_lease(server, timestamp);
8487c479 2870 trace_nfs4_setattr(inode, &arg->stateid, status);
65e4308d 2871 return status;
1da177e4
LT		 2872}
2873
659bfcd6
TM		 2874static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2875 struct nfs_fattr *fattr, struct iattr *sattr,
29b59f94 2876 struct nfs_open_context *ctx, struct nfs4_label *ilabel,
1775fd3e 2877 struct nfs4_label *olabel)
1da177e4 2878{
3e4f6290 2879 struct nfs_server *server = NFS_SERVER(inode);
29b59f94 2880 struct nfs4_state *state = ctx ? ctx->state : NULL;
d9b67e1e
AS		 2881 struct nfs_setattrargs arg = {
2882 .fh = NFS_FH(inode),
2883 .iap = sattr,
8487c479
TM		 2884 .server = server,
2885 .bitmask = server->attr_bitmask,
2886 .label = ilabel,
d9b67e1e
AS		 2887 };
2888 struct nfs_setattrres res = {
8487c479
TM		 2889 .fattr = fattr,
2890 .label = olabel,
2891 .server = server,
d9b67e1e 2892 };
a1d0b5ee
TM		 2893 struct nfs4_exception exception = {
2894 .state = state,
3114ea7a 2895 .inode = inode,
8487c479 2896 .stateid = &arg.stateid,
a1d0b5ee 2897 };
1da177e4 2898 int err;
8487c479
TM		 2899
2900 arg.bitmask = nfs4_bitmask(server, ilabel);
2901 if (ilabel)
2902 arg.bitmask = nfs4_bitmask(server, olabel);
2903
1da177e4 2904 do {
29b59f94 2905 err = _nfs4_do_setattr(inode, &arg, &res, cred, ctx);
451146be
TM		 2906 switch (err) {
2907 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 2908 if (!(sattr->ia_valid & ATTR_SIZE)) {
2909 pr_warn_once("NFSv4: server %s is incorrectly "
2910 "applying open mode checks to "
2911 "a SETATTR that is not "
2912 "changing file size.\n",
2913 server->nfs_client->cl_hostname);
2914 }
451146be
TM		 2915 if (state && !(state->state & FMODE_WRITE)) {
2916 err = -EBADF;
2917 if (sattr->ia_valid & ATTR_OPEN)
2918 err = -EACCES;
2919 goto out;
2920 }
2921 }
2922 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2923 } while (exception.retry);
451146be 2924out:
1da177e4
LT		 2925 return err;
2926}
2927
500d701f
PT		 2928static bool
2929nfs4_wait_on_layoutreturn(struct inode *inode, struct rpc_task *task)
2930{
2931 if (inode == NULL || !nfs_have_layout(inode))
2932 return false;
2933
2934 return pnfs_wait_on_layoutreturn(inode, task);
2935}
2936
1da177e4
LT		 2937struct nfs4_closedata {
2938 struct inode *inode;
2939 struct nfs4_state *state;
2940 struct nfs_closeargs arg;
2941 struct nfs_closeres res;
cf805165
TM		 2942 struct {
2943 struct nfs4_layoutreturn_args arg;
2944 struct nfs4_layoutreturn_res res;
4d796d75 2945 struct nfs4_xdr_opaque_data ld_private;
cf805165
TM		 2946 u32 roc_barrier;
2947 bool roc;
2948 } lr;
516a6af6 2949 struct nfs_fattr fattr;
26e976a8 2950 unsigned long timestamp;
1da177e4
LT		 2951};
2952
963d8fe5 2953static void nfs4_free_closedata(void *data)
9512135d 2954{
963d8fe5
TM		 2955 struct nfs4_closedata *calldata = data;
2956 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2957 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2958
cf805165 2959 if (calldata->lr.roc)
1c5bd76d
TM		 2960 pnfs_roc_release(&calldata->lr.arg, &calldata->lr.res,
2961 calldata->res.lr_ret);
9512135d
TM		 2962 nfs4_put_open_state(calldata->state);
2963 nfs_free_seqid(calldata->arg.seqid);
9512135d 2964 nfs4_put_state_owner(sp);
322b2b90 2965 nfs_sb_deactive(sb);
9512135d
TM		 2966 kfree(calldata);
2967}
2968
963d8fe5 2969static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2970{
963d8fe5 2971 struct nfs4_closedata *calldata = data;
1da177e4 2972 struct nfs4_state *state = calldata->state;
1da177e4 2973 struct nfs_server *server = NFS_SERVER(calldata->inode);
412f6c4c 2974 nfs4_stateid *res_stateid = NULL;
1da177e4 2975
a3ca5651 2976 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2977 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2978 return;
42113a75 2979 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
cf805165
TM		 2980
2981 /* Handle Layoutreturn errors */
2982 if (calldata->arg.lr_args && task->tk_status != 0) {
2983 switch (calldata->res.lr_ret) {
2984 default:
2985 calldata->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
2986 break;
2987 case 0:
2988 calldata->arg.lr_args = NULL;
2989 calldata->res.lr_res = NULL;
2990 break;
2991 case -NFS4ERR_ADMIN_REVOKED:
2992 case -NFS4ERR_DELEG_REVOKED:
2993 case -NFS4ERR_EXPIRED:
2994 case -NFS4ERR_BAD_STATEID:
2995 case -NFS4ERR_OLD_STATEID:
2996 case -NFS4ERR_UNKNOWN_LAYOUTTYPE:
2997 case -NFS4ERR_WRONG_CRED:
2998 calldata->arg.lr_args = NULL;
2999 calldata->res.lr_res = NULL;
3000 calldata->res.lr_ret = 0;
3001 rpc_restart_call_prepare(task);
3002 return;
3003 }
3004 }
3005
d9b67e1e 3006 /* hmm. we are done with the inode, and in the process of freeing
1da177e4
LT		 3007 * the state_owner. we keep this around to process errors
3008 */
1da177e4
LT		 3009 switch (task->tk_status) {
3010 case 0:
412f6c4c 3011 res_stateid = &calldata->res.stateid;
26e976a8 3012 renew_lease(server, calldata->timestamp);
412f6c4c 3013 break;
f07d4a31
TM		 3014 case -NFS4ERR_ACCESS:
3015 if (calldata->arg.bitmask != NULL) {
3016 calldata->arg.bitmask = NULL;
3017 calldata->res.fattr = NULL;
3018 task->tk_status = 0;
3019 rpc_restart_call_prepare(task);
3020 goto out_release;
3021
3022 }
3023 break;
69794ad7 3024 case -NFS4ERR_ADMIN_REVOKED:
1da177e4 3025 case -NFS4ERR_STALE_STATEID:
26d36301
TM		 3026 case -NFS4ERR_EXPIRED:
3027 nfs4_free_revoked_stateid(server,
3028 &calldata->arg.stateid,
3029 task->tk_msg.rpc_cred);
9e33bed5
TM		 3030 case -NFS4ERR_OLD_STATEID:
3031 case -NFS4ERR_BAD_STATEID:
566fcec6 3032 if (!nfs4_stateid_match(&calldata->arg.stateid,
369d6b7f 3033 &state->open_stateid)) {
566fcec6
TM		 3034 rpc_restart_call_prepare(task);
3035 goto out_release;
3036 }
dc0b027d 3037 if (calldata->arg.fmode == 0)
9e33bed5 3038 break;
1da177e4 3039 default:
8478eaa1 3040 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN) {
72211dbe 3041 rpc_restart_call_prepare(task);
69794ad7
TM		 3042 goto out_release;
3043 }
1da177e4 3044 }
4a1e2feb
TM		 3045 nfs_clear_open_stateid(state, &calldata->arg.stateid,
3046 res_stateid, calldata->arg.fmode);
69794ad7 3047out_release:
72211dbe 3048 nfs_release_seqid(calldata->arg.seqid);
d8d84983 3049 nfs_refresh_inode(calldata->inode, &calldata->fattr);
a3ca5651 3050 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 3051}
3052
4ce70ada 3053static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 3054{
4ce70ada 3055 struct nfs4_closedata *calldata = data;
9512135d 3056 struct nfs4_state *state = calldata->state;
7fdab069 3057 struct inode *inode = calldata->inode;
aee7af35 3058 bool is_rdonly, is_wronly, is_rdwr;
88069f77 3059 int call_close = 0;
9512135d 3060
a3ca5651 3061 dprintk("%s: begin!\n", __func__);
963d8fe5 3062 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 3063 goto out_wait;
003707c7 3064
88069f77 3065 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
4cecb76f 3066 spin_lock(&state->owner->so_lock);
aee7af35
TM		 3067 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
3068 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
3069 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
369d6b7f 3070 nfs4_stateid_copy(&calldata->arg.stateid, &state->open_stateid);
003707c7 3071 /* Calculate the change in open mode */
cd9288ff 3072 calldata->arg.fmode = 0;
e7616923 3073 if (state->n_rdwr == 0) {
cd9288ff
TM		 3074 if (state->n_rdonly == 0)
3075 call_close |= is_rdonly;
3076 else if (is_rdonly)
3077 calldata->arg.fmode |= FMODE_READ;
3078 if (state->n_wronly == 0)
3079 call_close |= is_wronly;
3080 else if (is_wronly)
3081 calldata->arg.fmode |= FMODE_WRITE;
e547f262
TM		 3082 if (calldata->arg.fmode != (FMODE_READ|FMODE_WRITE))
3083 call_close |= is_rdwr;
cd9288ff
TM		 3084 } else if (is_rdwr)
3085 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
3086
5cc7861e
TM		 3087 if (!nfs4_valid_open_stateid(state) ||
3088 test_bit(NFS_OPEN_STATE, &state->flags) == 0)
5d422301 3089 call_close = 0;
4cecb76f 3090 spin_unlock(&state->owner->so_lock);
88069f77
TM		 3091
3092 if (!call_close) {
963d8fe5 3093 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 3094 goto out_no_action;
9512135d 3095 }
88069f77 3096
1c5bd76d 3097 if (!calldata->lr.roc && nfs4_wait_on_layoutreturn(inode, task)) {
500d701f
PT		 3098 nfs_release_seqid(calldata->arg.seqid);
3099 goto out_wait;
3100 }
3101
9413a1a1 3102 if (calldata->arg.fmode == 0)
88069f77 3103 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
3ecefc92 3104
9413a1a1 3105 if (calldata->arg.fmode == 0 || calldata->arg.fmode == FMODE_READ) {
3ecefc92
TM		 3106 /* Close-to-open cache consistency revalidation */
3107 if (!nfs4_have_delegation(inode, FMODE_READ))
3108 calldata->arg.bitmask = NFS_SERVER(inode)->cache_consistency_bitmask;
3109 else
3110 calldata->arg.bitmask = NULL;
3111 }
3c13cb5b 3112
6ae37339
TM		 3113 calldata->arg.share_access =
3114 nfs4_map_atomic_open_share(NFS_SERVER(inode),
3115 calldata->arg.fmode, 0);
88069f77 3116
d8d84983
TM		 3117 if (calldata->res.fattr == NULL)
3118 calldata->arg.bitmask = NULL;
3119 else if (calldata->arg.bitmask == NULL)
3120 calldata->res.fattr = NULL;
26e976a8 3121 calldata->timestamp = jiffies;
42e1cca7 3122 if (nfs4_setup_sequence(NFS_SERVER(inode)->nfs_client,
9d12b216
TM		 3123 &calldata->arg.seq_args,
3124 &calldata->res.seq_res,
2240a9e2
TM		 3125 task) != 0)
3126 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 3127 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 3128 return;
3129out_no_action:
3130 task->tk_action = NULL;
3131out_wait:
3132 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 3133}
3134
963d8fe5 3135static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 3136 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 3137 .rpc_call_done = nfs4_close_done,
3138 .rpc_release = nfs4_free_closedata,
3139};
3140
1da177e4
LT		 3141/*
3142 * It is possible for data to be read/written from a mem-mapped file
3143 * after the sys_close call (which hits the vfs layer as a flush).
3144 * This means that we can't safely call nfsv4 close on a file until
3145 * the inode is cleared. This in turn means that we are not good
3146 * NFSv4 citizens - we do not indicate to the server to update the file's
3147 * share state even when we are done with one of the three share
3148 * stateid's in the inode.
3149 *
3150 * NOTE: Caller must be holding the sp->so_owner semaphore!
3151 */
1f7977c1 3152int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 3153{
4a35bd41 3154 struct nfs_server *server = NFS_SERVER(state->inode);
63f5f796 3155 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
1da177e4 3156 struct nfs4_closedata *calldata;
b39e625b
TM		 3157 struct nfs4_state_owner *sp = state->owner;
3158 struct rpc_task *task;
5138fde0
TM		 3159 struct rpc_message msg = {
3160 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
3161 .rpc_cred = state->owner->so_cred,
3162 };
c970aa85
TM		 3163 struct rpc_task_setup task_setup_data = {
3164 .rpc_client = server->client,
5138fde0 3165 .rpc_message = &msg,
c970aa85 3166 .callback_ops = &nfs4_close_ops,
101070ca 3167 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3168 .flags = RPC_TASK_ASYNC,
3169 };
9512135d 3170 int status = -ENOMEM;
1da177e4 3171
fa940720
WAA		 3172 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
3173 &task_setup_data.rpc_client, &msg);
3174
8535b2be 3175 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 3176 if (calldata == NULL)
9512135d 3177 goto out;
a9c92d6b 3178 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 3179 calldata->inode = state->inode;
1da177e4 3180 calldata->state = state;
4a35bd41 3181 calldata->arg.fh = NFS_FH(state->inode);
1da177e4 3182 /* Serialization for the sequence id */
63f5f796
TM		 3183 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
3184 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask);
badc76dd 3185 if (IS_ERR(calldata->arg.seqid))
9512135d 3186 goto out_free_calldata;
d8d84983 3187 nfs_fattr_init(&calldata->fattr);
dc0b027d 3188 calldata->arg.fmode = 0;
4d796d75 3189 calldata->lr.arg.ld_private = &calldata->lr.ld_private;
516a6af6 3190 calldata->res.fattr = &calldata->fattr;
c1d51931 3191 calldata->res.seqid = calldata->arg.seqid;
516a6af6 3192 calldata->res.server = server;
cf805165 3193 calldata->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
1c5bd76d
TM		 3194 calldata->lr.roc = pnfs_roc(state->inode,
3195 &calldata->lr.arg, &calldata->lr.res, msg.rpc_cred);
3196 if (calldata->lr.roc) {
3197 calldata->arg.lr_args = &calldata->lr.arg;
3198 calldata->res.lr_res = &calldata->lr.res;
3199 }
643168c2 3200 nfs_sb_active(calldata->inode->i_sb);
9512135d 3201
1174dd1f
TM		 3202 msg.rpc_argp = &calldata->arg;
3203 msg.rpc_resp = &calldata->res;
c970aa85
TM		 3204 task_setup_data.callback_data = calldata;
3205 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 3206 if (IS_ERR(task))
3207 return PTR_ERR(task);
a49c3c77
TM		 3208 status = 0;
3209 if (wait)
3210 status = rpc_wait_for_completion_task(task);
b39e625b 3211 rpc_put_task(task);
a49c3c77 3212 return status;
9512135d
TM		 3213out_free_calldata:
3214 kfree(calldata);
3215out:
b39e625b
TM		 3216 nfs4_put_open_state(state);
3217 nfs4_put_state_owner(sp);
9512135d 3218 return status;
1da177e4
LT		 3219}
3220
2b484297 3221static struct inode *
5bc2afc2
TM		 3222nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
3223 int open_flags, struct iattr *attr, int *opened)
1da177e4 3224{
1da177e4 3225 struct nfs4_state *state;
aa9c2669
DQ		 3226 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
3227
3228 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
1da177e4 3229
565277f6 3230 /* Protect against concurrent sillydeletes */
5bc2afc2 3231 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
aa9c2669
DQ		 3232
3233 nfs4_label_release_security(label);
3234
f46e0bd3
TM		 3235 if (IS_ERR(state))
3236 return ERR_CAST(state);
275bb307 3237 return state->inode;
1da177e4
LT		 3238}
3239
1185a552 3240static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 3241{
3242 if (ctx->state == NULL)
3243 return;
3244 if (is_sync)
643168c2 3245 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 3246 else
643168c2 3247 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 3248}
1da177e4 3249
b944dba3
TM		 3250#define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
3251#define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
dff25ddb 3252#define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_MODE_UMASK - 1UL)
b944dba3 3253
1da177e4
LT		 3254static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
3255{
8c61282f 3256 u32 bitmask[3] = {}, minorversion = server->nfs_client->cl_minorversion;
43652ad5
BH		 3257 struct nfs4_server_caps_arg args = {
3258 .fhandle = fhandle,
8c61282f 3259 .bitmask = bitmask,
43652ad5 3260 };
1da177e4
LT		 3261 struct nfs4_server_caps_res res = {};
3262 struct rpc_message msg = {
3263 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 3264 .rpc_argp = &args,
1da177e4
LT		 3265 .rpc_resp = &res,
3266 };
3267 int status;
3268
8c61282f
KM		 3269 bitmask[0] = FATTR4_WORD0_SUPPORTED_ATTRS |
3270 FATTR4_WORD0_FH_EXPIRE_TYPE |
3271 FATTR4_WORD0_LINK_SUPPORT |
3272 FATTR4_WORD0_SYMLINK_SUPPORT |
3273 FATTR4_WORD0_ACLSUPPORT;
3274 if (minorversion)
3275 bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3276
7c513058 3277 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3278 if (status == 0) {
b944dba3 3279 /* Sanity check the server answers */
8c61282f 3280 switch (minorversion) {
b944dba3
TM		 3281 case 0:
3282 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
3283 res.attr_bitmask[2] = 0;
3284 break;
3285 case 1:
3286 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
3287 break;
3288 case 2:
3289 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
3290 }
1da177e4 3291 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 3292 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
3293 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
3294 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
3295 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
b944dba3
TM		 3296 NFS_CAP_CTIME|NFS_CAP_MTIME|
3297 NFS_CAP_SECURITY_LABEL);
7dd7d959
MN		 3298 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
3299 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
1da177e4
LT		 3300 server->caps |= NFS_CAP_ACLS;
3301 if (res.has_links != 0)
3302 server->caps |= NFS_CAP_HARDLINKS;
3303 if (res.has_symlinks != 0)
3304 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 3305 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
3306 server->caps |= NFS_CAP_FILEID;
3307 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
3308 server->caps |= NFS_CAP_MODE;
3309 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
3310 server->caps |= NFS_CAP_NLINK;
3311 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
3312 server->caps |= NFS_CAP_OWNER;
3313 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
3314 server->caps |= NFS_CAP_OWNER_GROUP;
3315 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
3316 server->caps |= NFS_CAP_ATIME;
3317 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
3318 server->caps |= NFS_CAP_CTIME;
3319 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
3320 server->caps |= NFS_CAP_MTIME;
aa9c2669
DQ		 3321#ifdef CONFIG_NFS_V4_SECURITY_LABEL
3322 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
3323 server->caps |= NFS_CAP_SECURITY_LABEL;
3324#endif
3325 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
3326 sizeof(server->attr_bitmask));
b944dba3 3327 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
62ab460c 3328
a65318bf
TM		 3329 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
3330 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
3331 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
b944dba3 3332 server->cache_consistency_bitmask[2] = 0;
8c61282f
KM		 3333 memcpy(server->exclcreat_bitmask, res.exclcreat_bitmask,
3334 sizeof(server->exclcreat_bitmask));
1da177e4 3335 server->acl_bitmask = res.acl_bitmask;
264e6351 3336 server->fh_expire_type = res.fh_expire_type;
1da177e4 3337 }
cccef3b9 3338
1da177e4
LT		 3339 return status;
3340}
3341
55a97593 3342int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 3343{
3344 struct nfs4_exception exception = { };
3345 int err;
3346 do {
3347 err = nfs4_handle_exception(server,
3348 _nfs4_server_capabilities(server, fhandle),
3349 &exception);
3350 } while (exception.retry);
3351 return err;
3352}
3353
3354static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3355 struct nfs_fsinfo *info)
3356{
aa9c2669 3357 u32 bitmask[3];
1da177e4 3358 struct nfs4_lookup_root_arg args = {
aa9c2669 3359 .bitmask = bitmask,
1da177e4
LT		 3360 };
3361 struct nfs4_lookup_res res = {
3362 .server = server,
0e574af1 3363 .fattr = info->fattr,
1da177e4
LT		 3364 .fh = fhandle,
3365 };
3366 struct rpc_message msg = {
3367 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
3368 .rpc_argp = &args,
3369 .rpc_resp = &res,
3370 };
008f55d0 3371
aa9c2669
DQ		 3372 bitmask[0] = nfs4_fattr_bitmap[0];
3373 bitmask[1] = nfs4_fattr_bitmap[1];
3374 /*
3375 * Process the label in the upcoming getfattr
3376 */
3377 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
3378
0e574af1 3379 nfs_fattr_init(info->fattr);
7c513058 3380 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3381}
3382
3383static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3384 struct nfs_fsinfo *info)
3385{
3386 struct nfs4_exception exception = { };
3387 int err;
3388 do {
fb8a5ba8 3389 err = _nfs4_lookup_root(server, fhandle, info);
b5f875a9 3390 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
fb8a5ba8
BS		 3391 switch (err) {
3392 case 0:
3393 case -NFS4ERR_WRONGSEC:
05e9cfb4 3394 goto out;
fb8a5ba8
BS		 3395 default:
3396 err = nfs4_handle_exception(server, err, &exception);
3397 }
1da177e4 3398 } while (exception.retry);
05e9cfb4 3399out:
1da177e4
LT		 3400 return err;
3401}
3402
8f70e95f
BS		 3403static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3404 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
3405{
c2190661
TM		 3406 struct rpc_auth_create_args auth_args = {
3407 .pseudoflavor = flavor,
3408 };
8f70e95f 3409 struct rpc_auth *auth;
8f70e95f 3410
c2190661 3411 auth = rpcauth_create(&auth_args, server->client);
9df1336c
AS		 3412 if (IS_ERR(auth))
3413 return -EACCES;
3414 return nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 3415}
3416
9a744ba3
CL		 3417/*
3418 * Retry pseudoroot lookup with various security flavors. We do this when:
3419 *
3420 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
3421 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
3422 *
3423 * Returns zero on success, or a negative NFS4ERR value, or a
3424 * negative errno value.
3425 */
801a16dc 3426static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 3427 struct nfs_fsinfo *info)
1da177e4 3428{
9a744ba3
CL		 3429 /* Per 3530bis 15.33.5 */
3430 static const rpc_authflavor_t flav_array[] = {
3431 RPC_AUTH_GSS_KRB5P,
3432 RPC_AUTH_GSS_KRB5I,
3433 RPC_AUTH_GSS_KRB5,
c4eafe11 3434 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 3435 RPC_AUTH_NULL,
3436 };
3437 int status = -EPERM;
3438 size_t i;
6a1a1e34 3439
4d4b69dd
WAA		 3440 if (server->auth_info.flavor_len > 0) {
3441 /* try each flavor specified by user */
3442 for (i = 0; i < server->auth_info.flavor_len; i++) {
3443 status = nfs4_lookup_root_sec(server, fhandle, info,
3444 server->auth_info.flavors[i]);
3445 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3446 continue;
3447 break;
3448 }
3449 } else {
3450 /* no flavors specified by user, try default list */
3451 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3452 status = nfs4_lookup_root_sec(server, fhandle, info,
3453 flav_array[i]);
3454 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3455 continue;
3456 break;
3457 }
8f70e95f 3458 }
9a744ba3 3459
fb8a5ba8
BS		 3460 /*
3461 * -EACCESS could mean that the user doesn't have correct permissions
3462 * to access the mount. It could also mean that we tried to mount
3463 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
3464 * existing mount programs don't handle -EACCES very well so it should
3465 * be mapped to -EPERM instead.
3466 */
3467 if (status == -EACCES)
3468 status = -EPERM;
801a16dc
BS		 3469 return status;
3470}
3471
2ed4b95b
CL		 3472/**
3473 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
3474 * @server: initialized nfs_server handle
3475 * @fhandle: we fill in the pseudo-fs root file handle
3476 * @info: we fill in an FSINFO struct
5e6b1990 3477 * @auth_probe: probe the auth flavours
2ed4b95b
CL		 3478 *
3479 * Returns zero on success, or a negative errno.
801a16dc 3480 */
3028eb2b 3481int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
5e6b1990
TM		 3482 struct nfs_fsinfo *info,
3483 bool auth_probe)
801a16dc 3484{
c7757074 3485 int status = 0;
2ed4b95b 3486
c7757074 3487 if (!auth_probe)
5e6b1990 3488 status = nfs4_lookup_root(server, fhandle, info);
c7757074
AP		 3489
3490 if (auth_probe || status == NFS4ERR_WRONGSEC)
698c937b
TM		 3491 status = server->nfs_client->cl_mvops->find_root_sec(server,
3492 fhandle, info);
2ed4b95b 3493
1da177e4
LT		 3494 if (status == 0)
3495 status = nfs4_server_capabilities(server, fhandle);
3496 if (status == 0)
3497 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 3498
c12e87f4 3499 return nfs4_map_errors(status);
1da177e4
LT		 3500}
3501
bae36241
BS		 3502static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3503 struct nfs_fsinfo *info)
3504{
3505 int error;
3506 struct nfs_fattr *fattr = info->fattr;
1775fd3e 3507 struct nfs4_label *label = NULL;
bae36241
BS		 3508
3509 error = nfs4_server_capabilities(server, mntfh);
3510 if (error < 0) {
3511 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3512 return error;
3513 }
3514
14c43f76
DQ		 3515 label = nfs4_label_alloc(server, GFP_KERNEL);
3516 if (IS_ERR(label))
3517 return PTR_ERR(label);
3518
1775fd3e 3519 error = nfs4_proc_getattr(server, mntfh, fattr, label);
bae36241
BS		 3520 if (error < 0) {
3521 dprintk("nfs4_get_root: getattr error = %d\n", -error);
14c43f76 3522 goto err_free_label;
bae36241
BS		 3523 }
3524
3525 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3526 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3527 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3528
14c43f76
DQ		 3529err_free_label:
3530 nfs4_label_free(label);
3531
bae36241
BS		 3532 return error;
3533}
3534
6b97fd3d
MN		 3535/*
3536 * Get locations and (maybe) other attributes of a referral.
3537 * Note that we'll actually follow the referral later when
3538 * we detect fsid mismatch in inode revalidation
3539 */
f05d147f
BS		 3540static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3541 const struct qstr *name, struct nfs_fattr *fattr,
3542 struct nfs_fh *fhandle)
6b97fd3d
MN		 3543{
3544 int status = -ENOMEM;
3545 struct page *page = NULL;
3546 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 3547
3548 page = alloc_page(GFP_KERNEL);
3549 if (page == NULL)
3550 goto out;
3551 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3552 if (locations == NULL)
3553 goto out;
3554
f05d147f 3555 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 3556 if (status != 0)
3557 goto out;
519ae255
CL		 3558
3559 /*
3560 * If the fsid didn't change, this is a migration event, not a
3561 * referral. Cause us to drop into the exception handler, which
3562 * will kick off migration recovery.
3563 */
6b97fd3d 3564 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 3565 dprintk("%s: server did not return a different fsid for"
3566 " a referral at %s\n", __func__, name->name);
519ae255 3567 status = -NFS4ERR_MOVED;
6b97fd3d
MN		 3568 goto out;
3569 }
533eb461
AA		 3570 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3571 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 3572
533eb461 3573 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 3574 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 3575 memset(fhandle, 0, sizeof(struct nfs_fh));
3576out:
3577 if (page)
3578 __free_page(page);
5d7ca35a 3579 kfree(locations);
6b97fd3d
MN		 3580 return status;
3581}
3582
1775fd3e
DQ		 3583static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3584 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3585{
3586 struct nfs4_getattr_arg args = {
3587 .fh = fhandle,
3588 .bitmask = server->attr_bitmask,
3589 };
3590 struct nfs4_getattr_res res = {
3591 .fattr = fattr,
1775fd3e 3592 .label = label,
1da177e4
LT		 3593 .server = server,
3594 };
3595 struct rpc_message msg = {
3596 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3597 .rpc_argp = &args,
3598 .rpc_resp = &res,
3599 };
aa9c2669
DQ		 3600
3601 args.bitmask = nfs4_bitmask(server, label);
3602
0e574af1 3603 nfs_fattr_init(fattr);
7c513058 3604 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3605}
3606
1775fd3e
DQ		 3607static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3608 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3609{
3610 struct nfs4_exception exception = { };
3611 int err;
3612 do {
b5f875a9
TM		 3613 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3614 trace_nfs4_getattr(server, fhandle, fattr, err);
3615 err = nfs4_handle_exception(server, err,
1da177e4
LT		 3616 &exception);
3617 } while (exception.retry);
3618 return err;
3619}
3620
3621/*
3622 * The file is not closed if it is opened due to the a request to change
3623 * the size of the file. The open call will not be needed once the
3624 * VFS layer lookup-intents are implemented.
3625 *
3626 * Close is called when the inode is destroyed.
3627 * If we haven't opened the file for O_WRONLY, we
3628 * need to in the size_change case to obtain a stateid.
3629 *
3630 * Got race?
3631 * Because OPEN is always done by name in nfsv4, it is
3632 * possible that we opened a different file by the same
3633 * name. We can recognize this race condition, but we
3634 * can't do anything about it besides returning an error.
3635 *
3636 * This will be fixed with VFS changes (lookup-intent).
3637 */
3638static int
3639nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3640 struct iattr *sattr)
3641{
2b0143b5 3642 struct inode *inode = d_inode(dentry);
659bfcd6 3643 struct rpc_cred *cred = NULL;
29b59f94 3644 struct nfs_open_context *ctx = NULL;
14c43f76 3645 struct nfs4_label *label = NULL;
1da177e4
LT		 3646 int status;
3647
88ac815c
PT		 3648 if (pnfs_ld_layoutret_on_setattr(inode) &&
3649 sattr->ia_valid & ATTR_SIZE &&
3650 sattr->ia_size < i_size_read(inode))
24028672 3651 pnfs_commit_and_return_layout(inode);
8a1636c4 3652
0e574af1 3653 nfs_fattr_init(fattr);
1da177e4 3654
2669940d
AA		 3655 /* Deal with open(O_TRUNC) */
3656 if (sattr->ia_valid & ATTR_OPEN)
cc7936f9 3657 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2669940d
AA		 3658
3659 /* Optimization: if the end result is no change, don't RPC */
cc7936f9 3660 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2669940d
AA		 3661 return 0;
3662
d530838b 3663 /* Search for an existing open(O_WRITE) file */
659bfcd6 3664 if (sattr->ia_valid & ATTR_FILE) {
659bfcd6
TM		 3665
3666 ctx = nfs_file_open_context(sattr->ia_file);
29b59f94 3667 if (ctx)
504e5189 3668 cred = ctx->cred;
659bfcd6 3669 }
08e9eac4 3670
14c43f76
DQ		 3671 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3672 if (IS_ERR(label))
3673 return PTR_ERR(label);
3674
29b59f94 3675 status = nfs4_do_setattr(inode, cred, fattr, sattr, ctx, NULL, label);
aa9c2669 3676 if (status == 0) {
f044636d 3677 nfs_setattr_update_inode(inode, sattr, fattr);
aa9c2669
DQ		 3678 nfs_setsecurity(inode, fattr, label);
3679 }
14c43f76 3680 nfs4_label_free(label);
1da177e4
LT		 3681 return status;
3682}
3683
0c2e53f1
TM		 3684static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3685 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3686 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 3687{
0c2e53f1 3688 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 3689 int status;
3690 struct nfs4_lookup_arg args = {
3691 .bitmask = server->attr_bitmask,
0c2e53f1 3692 .dir_fh = NFS_FH(dir),
2b3de441
DH		 3693 .name = name,
3694 };
3695 struct nfs4_lookup_res res = {
3696 .server = server,
3697 .fattr = fattr,
aa9c2669 3698 .label = label,
2b3de441
DH		 3699 .fh = fhandle,
3700 };
3701 struct rpc_message msg = {
3702 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3703 .rpc_argp = &args,
3704 .rpc_resp = &res,
3705 };
3706
aa9c2669
DQ		 3707 args.bitmask = nfs4_bitmask(server, label);
3708
2b3de441
DH		 3709 nfs_fattr_init(fattr);
3710
1da177e4 3711 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 3712 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3713 dprintk("NFS reply lookup: %d\n", status);
3714 return status;
3715}
3716
72de53ec 3717static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 3718{
7ebb9315 3719 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 3720 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 3721 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3722 fattr->nlink = 2;
3723}
3724
72de53ec 3725static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
beffb8fe 3726 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3727 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3728{
3729 struct nfs4_exception exception = { };
72de53ec 3730 struct rpc_clnt *client = *clnt;
1da177e4
LT		 3731 int err;
3732 do {
1775fd3e 3733 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
078ea3df 3734 trace_nfs4_lookup(dir, name, err);
72de53ec 3735 switch (err) {
08ef7bd3 3736 case -NFS4ERR_BADNAME:
72de53ec
BS		 3737 err = -ENOENT;
3738 goto out;
0c2e53f1 3739 case -NFS4ERR_MOVED:
f05d147f 3740 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
c86c90c6
DM		 3741 if (err == -NFS4ERR_MOVED)
3742 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
72de53ec 3743 goto out;
0c2e53f1 3744 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 3745 err = -EPERM;
3746 if (client != *clnt)
3747 goto out;
66b06860 3748 client = nfs4_negotiate_security(client, dir, name);
72de53ec
BS		 3749 if (IS_ERR(client))
3750 return PTR_ERR(client);
3751
3752 exception.retry = 1;
3753 break;
3754 default:
3755 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 3756 }
1da177e4 3757 } while (exception.retry);
72de53ec
BS		 3758
3759out:
3760 if (err == 0)
3761 *clnt = client;
3762 else if (client != *clnt)
3763 rpc_shutdown_client(client);
3764
1da177e4
LT		 3765 return err;
3766}
3767
beffb8fe 3768static int nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1775fd3e
DQ		 3769 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3770 struct nfs4_label *label)
72de53ec
BS		 3771{
3772 int status;
3773 struct rpc_clnt *client = NFS_CLIENT(dir);
3774
1775fd3e 3775 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
72de53ec
BS		 3776 if (client != NFS_CLIENT(dir)) {
3777 rpc_shutdown_client(client);
3778 nfs_fixup_secinfo_attributes(fattr);
3779 }
3780 return status;
3781}
3782
f05d147f 3783struct rpc_clnt *
beffb8fe 3784nfs4_proc_lookup_mountpoint(struct inode *dir, const struct qstr *name,
f05d147f
BS		 3785 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3786{
b72888cb 3787 struct rpc_clnt *client = NFS_CLIENT(dir);
f05d147f 3788 int status;
f05d147f 3789
1775fd3e 3790 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
b72888cb 3791 if (status < 0)
f05d147f 3792 return ERR_PTR(status);
b72888cb 3793 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
f05d147f
BS		 3794}
3795
1da177e4
LT		 3796static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3797{
76b32999 3798 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3799 struct nfs4_accessargs args = {
3800 .fh = NFS_FH(inode),
a4980e78 3801 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 3802 };
3803 struct nfs4_accessres res = {
3804 .server = server,
1da177e4 3805 };
1da177e4
LT		 3806 struct rpc_message msg = {
3807 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3808 .rpc_argp = &args,
3809 .rpc_resp = &res,
3810 .rpc_cred = entry->cred,
3811 };
3812 int mode = entry->mask;
aa9c2669 3813 int status = 0;
1da177e4
LT		 3814
3815 /*
3816 * Determine which access bits we want to ask for...
3817 */
3818 if (mode & MAY_READ)
3819 args.access |= NFS4_ACCESS_READ;
3820 if (S_ISDIR(inode->i_mode)) {
3821 if (mode & MAY_WRITE)
3822 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3823 if (mode & MAY_EXEC)
3824 args.access |= NFS4_ACCESS_LOOKUP;
3825 } else {
3826 if (mode & MAY_WRITE)
3827 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3828 if (mode & MAY_EXEC)
3829 args.access |= NFS4_ACCESS_EXECUTE;
3830 }
c407d41a
TM		 3831
3832 res.fattr = nfs_alloc_fattr();
3833 if (res.fattr == NULL)
3834 return -ENOMEM;
3835
7c513058 3836 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3837 if (!status) {
6168f62c 3838 nfs_access_set_mask(entry, res.access);
c407d41a 3839 nfs_refresh_inode(inode, res.fattr);
1da177e4 3840 }
c407d41a 3841 nfs_free_fattr(res.fattr);
1da177e4
LT		 3842 return status;
3843}
3844
3845static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3846{
3847 struct nfs4_exception exception = { };
3848 int err;
3849 do {
c1578b76
TM		 3850 err = _nfs4_proc_access(inode, entry);
3851 trace_nfs4_access(inode, err);
3852 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3853 &exception);
3854 } while (exception.retry);
3855 return err;
3856}
3857
3858/*
3859 * TODO: For the time being, we don't try to get any attributes
3860 * along with any of the zero-copy operations READ, READDIR,
3861 * READLINK, WRITE.
3862 *
3863 * In the case of the first three, we want to put the GETATTR
3864 * after the read-type operation -- this is because it is hard
3865 * to predict the length of a GETATTR response in v4, and thus
3866 * align the READ data correctly. This means that the GETATTR
3867 * may end up partially falling into the page cache, and we should
3868 * shift it into the 'tail' of the xdr_buf before processing.
3869 * To do this efficiently, we need to know the total length
3870 * of data received, which doesn't seem to be available outside
3871 * of the RPC layer.
3872 *
3873 * In the case of WRITE, we also want to put the GETATTR after
3874 * the operation -- in this case because we want to make sure
140150db 3875 * we get the post-operation mtime and size.
1da177e4
LT		 3876 *
3877 * Both of these changes to the XDR layer would in fact be quite
3878 * minor, but I decided to leave them for a subsequent patch.
3879 */
3880static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3881 unsigned int pgbase, unsigned int pglen)
3882{
3883 struct nfs4_readlink args = {
3884 .fh = NFS_FH(inode),
3885 .pgbase = pgbase,
3886 .pglen = pglen,
3887 .pages = &page,
3888 };
f50c7000 3889 struct nfs4_readlink_res res;
1da177e4
LT		 3890 struct rpc_message msg = {
3891 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3892 .rpc_argp = &args,
f50c7000 3893 .rpc_resp = &res,
1da177e4
LT		 3894 };
3895
7c513058 3896 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3897}
3898
3899static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3900 unsigned int pgbase, unsigned int pglen)
3901{
3902 struct nfs4_exception exception = { };
3903 int err;
3904 do {
c1578b76
TM		 3905 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3906 trace_nfs4_readlink(inode, err);
3907 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3908 &exception);
3909 } while (exception.retry);
3910 return err;
3911}
3912
1da177e4 3913/*
8867fe58 3914 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3915 */
1da177e4
LT		 3916static int
3917nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3918 int flags)
1da177e4 3919{
dff25ddb 3920 struct nfs_server *server = NFS_SERVER(dir);
aa9c2669 3921 struct nfs4_label l, *ilabel = NULL;
8867fe58 3922 struct nfs_open_context *ctx;
1da177e4 3923 struct nfs4_state *state;
1da177e4
LT		 3924 int status = 0;
3925
532d4def 3926 ctx = alloc_nfs_open_context(dentry, FMODE_READ, NULL);
8867fe58
MS		 3927 if (IS_ERR(ctx))
3928 return PTR_ERR(ctx);
3929
aa9c2669
DQ		 3930 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3931
dff25ddb
AG		 3932 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
3933 sattr->ia_mode &= ~current_umask();
c5c3fb5f 3934 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, NULL);
1da177e4
LT		 3935 if (IS_ERR(state)) {
3936 status = PTR_ERR(state);
c0204fd2 3937 goto out;
1da177e4 3938 }
1da177e4 3939out:
aa9c2669 3940 nfs4_label_release_security(ilabel);
8867fe58 3941 put_nfs_open_context(ctx);
1da177e4
LT		 3942 return status;
3943}
3944
beffb8fe 3945static int _nfs4_proc_remove(struct inode *dir, const struct qstr *name)
1da177e4 3946{
16e42959 3947 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3948 struct nfs_removeargs args = {
1da177e4 3949 .fh = NFS_FH(dir),
26fe5750 3950 .name = *name,
16e42959 3951 };
4fdc17b2 3952 struct nfs_removeres res = {
16e42959 3953 .server = server,
1da177e4 3954 };
1da177e4 3955 struct rpc_message msg = {
4fdc17b2
TM		 3956 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3957 .rpc_argp = &args,
3958 .rpc_resp = &res,
1da177e4 3959 };
d3129ef6 3960 unsigned long timestamp = jiffies;
778d2817 3961 int status;
1da177e4 3962
7c513058 3963 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3964 if (status == 0)
d3129ef6 3965 update_changeattr(dir, &res.cinfo, timestamp);
1da177e4
LT		 3966 return status;
3967}
3968
beffb8fe 3969static int nfs4_proc_remove(struct inode *dir, const struct qstr *name)
1da177e4
LT		 3970{
3971 struct nfs4_exception exception = { };
3972 int err;
3973 do {
078ea3df
TM		 3974 err = _nfs4_proc_remove(dir, name);
3975 trace_nfs4_remove(dir, name, err);
3976 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3977 &exception);
3978 } while (exception.retry);
3979 return err;
3980}
3981
e4eff1a6 3982static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3983{
e4eff1a6
TM		 3984 struct nfs_server *server = NFS_SERVER(dir);
3985 struct nfs_removeargs *args = msg->rpc_argp;
3986 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3987
e4eff1a6 3988 res->server = server;
1da177e4 3989 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
a9c92d6b 3990 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
aa9c2669
DQ		 3991
3992 nfs_fattr_init(res->dir_attr);
1da177e4
LT		 3993}
3994
34e137cc
BS		 3995static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3996{
42e1cca7 3997 nfs4_setup_sequence(NFS_SB(data->dentry->d_sb)->nfs_client,
d9afbd1b
TM		 3998 &data->args.seq_args,
3999 &data->res.seq_res,
4000 task);
1da177e4
LT		 4001}
4002
e4eff1a6 4003static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 4004{
078ea3df
TM		 4005 struct nfs_unlinkdata *data = task->tk_calldata;
4006 struct nfs_removeres *res = &data->res;
e4eff1a6 4007
14516c3a
TM		 4008 if (!nfs4_sequence_done(task, &res->seq_res))
4009 return 0;
8478eaa1
N		 4010 if (nfs4_async_handle_error(task, res->server, NULL,
4011 &data->timeout) == -EAGAIN)
e4eff1a6 4012 return 0;
c40d52fe 4013 if (task->tk_status == 0)
d3129ef6 4014 update_changeattr(dir, &res->cinfo, res->dir_attr->time_start);
e4eff1a6 4015 return 1;
1da177e4
LT		 4016}
4017
d3d4152a
JL		 4018static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
4019{
4020 struct nfs_server *server = NFS_SERVER(dir);
4021 struct nfs_renameargs *arg = msg->rpc_argp;
4022 struct nfs_renameres *res = msg->rpc_resp;
4023
4024 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 4025 res->server = server;
a9c92d6b 4026 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 4027}
4028
c6bfa1a1
BS		 4029static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
4030{
42e1cca7 4031 nfs4_setup_sequence(NFS_SERVER(data->old_dir)->nfs_client,
d9afbd1b
TM		 4032 &data->args.seq_args,
4033 &data->res.seq_res,
4034 task);
d3d4152a
JL		 4035}
4036
4037static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
4038 struct inode *new_dir)
4039{
fbc6f7c2
TM		 4040 struct nfs_renamedata *data = task->tk_calldata;
4041 struct nfs_renameres *res = &data->res;
d3d4152a
JL		 4042
4043 if (!nfs4_sequence_done(task, &res->seq_res))
4044 return 0;
8478eaa1 4045 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
d3d4152a
JL		 4046 return 0;
4047
c733c49c 4048 if (task->tk_status == 0) {
d3129ef6 4049 update_changeattr(old_dir, &res->old_cinfo, res->old_fattr->time_start);
c733c49c 4050 if (new_dir != old_dir)
d3129ef6 4051 update_changeattr(new_dir, &res->new_cinfo, res->new_fattr->time_start);
c733c49c 4052 }
d3d4152a
JL		 4053 return 1;
4054}
4055
beffb8fe 4056static int _nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name)
1da177e4 4057{
91ba2eee 4058 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 4059 struct nfs4_link_arg arg = {
4060 .fh = NFS_FH(inode),
4061 .dir_fh = NFS_FH(dir),
4062 .name = name,
91ba2eee
TM		 4063 .bitmask = server->attr_bitmask,
4064 };
91ba2eee
TM		 4065 struct nfs4_link_res res = {
4066 .server = server,
1775fd3e 4067 .label = NULL,
1da177e4 4068 };
1da177e4
LT		 4069 struct rpc_message msg = {
4070 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
4071 .rpc_argp = &arg,
91ba2eee 4072 .rpc_resp = &res,
1da177e4 4073 };
136f2627
TM		 4074 int status = -ENOMEM;
4075
4076 res.fattr = nfs_alloc_fattr();
778d2817 4077 if (res.fattr == NULL)
136f2627 4078 goto out;
1da177e4 4079
14c43f76
DQ		 4080 res.label = nfs4_label_alloc(server, GFP_KERNEL);
4081 if (IS_ERR(res.label)) {
4082 status = PTR_ERR(res.label);
4083 goto out;
4084 }
aa9c2669 4085 arg.bitmask = nfs4_bitmask(server, res.label);
14c43f76 4086
7c513058 4087 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee 4088 if (!status) {
d3129ef6 4089 update_changeattr(dir, &res.cinfo, res.fattr->time_start);
aa9c2669
DQ		 4090 status = nfs_post_op_update_inode(inode, res.fattr);
4091 if (!status)
4092 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 4093 }
14c43f76
DQ		 4094
4095
4096 nfs4_label_free(res.label);
4097
136f2627 4098out:
136f2627 4099 nfs_free_fattr(res.fattr);
1da177e4
LT		 4100 return status;
4101}
4102
beffb8fe 4103static int nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name)
1da177e4
LT		 4104{
4105 struct nfs4_exception exception = { };
4106 int err;
4107 do {
4108 err = nfs4_handle_exception(NFS_SERVER(inode),
4109 _nfs4_proc_link(inode, dir, name),
4110 &exception);
4111 } while (exception.retry);
4112 return err;
4113}
4114
57dc9a57
TM		 4115struct nfs4_createdata {
4116 struct rpc_message msg;
4117 struct nfs4_create_arg arg;
4118 struct nfs4_create_res res;
4119 struct nfs_fh fh;
4120 struct nfs_fattr fattr;
1775fd3e 4121 struct nfs4_label *label;
57dc9a57
TM		 4122};
4123
4124static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
beffb8fe 4125 const struct qstr *name, struct iattr *sattr, u32 ftype)
57dc9a57
TM		 4126{
4127 struct nfs4_createdata *data;
4128
4129 data = kzalloc(sizeof(*data), GFP_KERNEL);
4130 if (data != NULL) {
4131 struct nfs_server *server = NFS_SERVER(dir);
4132
14c43f76
DQ		 4133 data->label = nfs4_label_alloc(server, GFP_KERNEL);
4134 if (IS_ERR(data->label))
4135 goto out_free;
4136
57dc9a57
TM		 4137 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
4138 data->msg.rpc_argp = &data->arg;
4139 data->msg.rpc_resp = &data->res;
4140 data->arg.dir_fh = NFS_FH(dir);
4141 data->arg.server = server;
4142 data->arg.name = name;
4143 data->arg.attrs = sattr;
4144 data->arg.ftype = ftype;
aa9c2669 4145 data->arg.bitmask = nfs4_bitmask(server, data->label);
dff25ddb 4146 data->arg.umask = current_umask();
57dc9a57
TM		 4147 data->res.server = server;
4148 data->res.fh = &data->fh;
4149 data->res.fattr = &data->fattr;
1775fd3e 4150 data->res.label = data->label;
57dc9a57 4151 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 4152 }
4153 return data;
14c43f76
DQ		 4154out_free:
4155 kfree(data);
4156 return NULL;
57dc9a57
TM		 4157}
4158
4159static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
4160{
7c513058 4161 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 4162 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57 4163 if (status == 0) {
d3129ef6
TM		 4164 update_changeattr(dir, &data->res.dir_cinfo,
4165 data->res.fattr->time_start);
1775fd3e 4166 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 4167 }
4168 return status;
4169}
4170
4171static void nfs4_free_createdata(struct nfs4_createdata *data)
4172{
14c43f76 4173 nfs4_label_free(data->label);
57dc9a57
TM		 4174 kfree(data);
4175}
4176
4f390c15 4177static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 4178 struct page *page, unsigned int len, struct iattr *sattr,
4179 struct nfs4_label *label)
1da177e4 4180{
57dc9a57
TM		 4181 struct nfs4_createdata *data;
4182 int status = -ENAMETOOLONG;
1da177e4 4183
94a6d753 4184 if (len > NFS4_MAXPATHLEN)
57dc9a57 4185 goto out;
4f390c15 4186
57dc9a57
TM		 4187 status = -ENOMEM;
4188 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
4189 if (data == NULL)
4190 goto out;
4191
4192 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
4193 data->arg.u.symlink.pages = &page;
4194 data->arg.u.symlink.len = len;
1775fd3e 4195 data->arg.label = label;
1da177e4 4196
57dc9a57
TM		 4197 status = nfs4_do_create(dir, dentry, data);
4198
4199 nfs4_free_createdata(data);
4200out:
1da177e4
LT		 4201 return status;
4202}
4203
4f390c15 4204static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 4205 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 4206{
4207 struct nfs4_exception exception = { };
aa9c2669 4208 struct nfs4_label l, *label = NULL;
1da177e4 4209 int err;
aa9c2669
DQ		 4210
4211 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4212
1da177e4 4213 do {
078ea3df
TM		 4214 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
4215 trace_nfs4_symlink(dir, &dentry->d_name, err);
4216 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4217 &exception);
4218 } while (exception.retry);
aa9c2669
DQ		 4219
4220 nfs4_label_release_security(label);
1da177e4
LT		 4221 return err;
4222}
4223
4224static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 4225 struct iattr *sattr, struct nfs4_label *label)
1da177e4 4226{
57dc9a57
TM		 4227 struct nfs4_createdata *data;
4228 int status = -ENOMEM;
1da177e4 4229
57dc9a57
TM		 4230 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
4231 if (data == NULL)
4232 goto out;
4233
1775fd3e 4234 data->arg.label = label;
57dc9a57
TM		 4235 status = nfs4_do_create(dir, dentry, data);
4236
4237 nfs4_free_createdata(data);
4238out:
1da177e4
LT		 4239 return status;
4240}
4241
4242static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
4243 struct iattr *sattr)
4244{
dff25ddb 4245 struct nfs_server *server = NFS_SERVER(dir);
1da177e4 4246 struct nfs4_exception exception = { };
aa9c2669 4247 struct nfs4_label l, *label = NULL;
1da177e4 4248 int err;
a8a5da99 4249
aa9c2669
DQ		 4250 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4251
dff25ddb
AG		 4252 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
4253 sattr->ia_mode &= ~current_umask();
1da177e4 4254 do {
078ea3df
TM		 4255 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
4256 trace_nfs4_mkdir(dir, &dentry->d_name, err);
4257 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4258 &exception);
4259 } while (exception.retry);
aa9c2669
DQ		 4260 nfs4_label_release_security(label);
4261
1da177e4
LT		 4262 return err;
4263}
4264
4265static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 4266 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4 4267{
2b0143b5 4268 struct inode *dir = d_inode(dentry);
1da177e4
LT		 4269 struct nfs4_readdir_arg args = {
4270 .fh = NFS_FH(dir),
56e4ebf8 4271 .pages = pages,
1da177e4
LT		 4272 .pgbase = 0,
4273 .count = count,
2b0143b5 4274 .bitmask = NFS_SERVER(d_inode(dentry))->attr_bitmask,
82f2e547 4275 .plus = plus,
1da177e4
LT		 4276 };
4277 struct nfs4_readdir_res res;
4278 struct rpc_message msg = {
4279 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
4280 .rpc_argp = &args,
4281 .rpc_resp = &res,
4282 .rpc_cred = cred,
4283 };
4284 int status;
4285
6de1472f
AV		 4286 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
4287 dentry,
eadf4598 4288 (unsigned long long)cookie);
c3f52af3 4289 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 4290 res.pgbase = args.pgbase;
7c513058 4291 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 4292 if (status >= 0) {
c3f52af3 4293 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 4294 status += args.pgbase;
4295 }
c4812998
TM		 4296
4297 nfs_invalidate_atime(dir);
4298
3110ff80 4299 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 4300 return status;
4301}
4302
4303static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 4304 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 4305{
4306 struct nfs4_exception exception = { };
4307 int err;
4308 do {
c1578b76
TM		 4309 err = _nfs4_proc_readdir(dentry, cred, cookie,
4310 pages, count, plus);
2b0143b5
DH		 4311 trace_nfs4_readdir(d_inode(dentry), err);
4312 err = nfs4_handle_exception(NFS_SERVER(d_inode(dentry)), err,
1da177e4
LT		 4313 &exception);
4314 } while (exception.retry);
4315 return err;
4316}
4317
4318static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 4319 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 4320{
57dc9a57
TM		 4321 struct nfs4_createdata *data;
4322 int mode = sattr->ia_mode;
4323 int status = -ENOMEM;
1da177e4 4324
57dc9a57
TM		 4325 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
4326 if (data == NULL)
4327 goto out;
4328
1da177e4 4329 if (S_ISFIFO(mode))
57dc9a57 4330 data->arg.ftype = NF4FIFO;
1da177e4 4331 else if (S_ISBLK(mode)) {
57dc9a57
TM		 4332 data->arg.ftype = NF4BLK;
4333 data->arg.u.device.specdata1 = MAJOR(rdev);
4334 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 4335 }
4336 else if (S_ISCHR(mode)) {
57dc9a57
TM		 4337 data->arg.ftype = NF4CHR;
4338 data->arg.u.device.specdata1 = MAJOR(rdev);
4339 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 4340 } else if (!S_ISSOCK(mode)) {
4341 status = -EINVAL;
4342 goto out_free;
1da177e4 4343 }
1775fd3e 4344
aa9c2669 4345 data->arg.label = label;
57dc9a57 4346 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 4347out_free:
57dc9a57
TM		 4348 nfs4_free_createdata(data);
4349out:
1da177e4
LT		 4350 return status;
4351}
4352
4353static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
4354 struct iattr *sattr, dev_t rdev)
4355{
dff25ddb 4356 struct nfs_server *server = NFS_SERVER(dir);
1da177e4 4357 struct nfs4_exception exception = { };
aa9c2669 4358 struct nfs4_label l, *label = NULL;
1da177e4 4359 int err;
a8a5da99 4360
aa9c2669
DQ		 4361 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4362
dff25ddb
AG		 4363 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
4364 sattr->ia_mode &= ~current_umask();
1da177e4 4365 do {
078ea3df
TM		 4366 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
4367 trace_nfs4_mknod(dir, &dentry->d_name, err);
4368 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4369 &exception);
4370 } while (exception.retry);
aa9c2669
DQ		 4371
4372 nfs4_label_release_security(label);
4373
1da177e4
LT		 4374 return err;
4375}
4376
4377static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
4378 struct nfs_fsstat *fsstat)
4379{
4380 struct nfs4_statfs_arg args = {
4381 .fh = fhandle,
4382 .bitmask = server->attr_bitmask,
4383 };
24ad148a
BH		 4384 struct nfs4_statfs_res res = {
4385 .fsstat = fsstat,
4386 };
1da177e4
LT		 4387 struct rpc_message msg = {
4388 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
4389 .rpc_argp = &args,
24ad148a 4390 .rpc_resp = &res,
1da177e4
LT		 4391 };
4392
0e574af1 4393 nfs_fattr_init(fsstat->fattr);
7c513058 4394 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4395}
4396
4397static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
4398{
4399 struct nfs4_exception exception = { };
4400 int err;
4401 do {
4402 err = nfs4_handle_exception(server,
4403 _nfs4_proc_statfs(server, fhandle, fsstat),
4404 &exception);
4405 } while (exception.retry);
4406 return err;
4407}
4408
4409static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
4410 struct nfs_fsinfo *fsinfo)
4411{
4412 struct nfs4_fsinfo_arg args = {
4413 .fh = fhandle,
4414 .bitmask = server->attr_bitmask,
4415 };
3dda5e43
BH		 4416 struct nfs4_fsinfo_res res = {
4417 .fsinfo = fsinfo,
4418 };
1da177e4
LT		 4419 struct rpc_message msg = {
4420 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
4421 .rpc_argp = &args,
3dda5e43 4422 .rpc_resp = &res,
1da177e4
LT		 4423 };
4424
7c513058 4425 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4426}
4427
4428static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4429{
4430 struct nfs4_exception exception = { };
83ca7f5a 4431 unsigned long now = jiffies;
1da177e4
LT		 4432 int err;
4433
4434 do {
83ca7f5a 4435 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
b5f875a9 4436 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
83ca7f5a 4437 if (err == 0) {
fb10fb67
TM		 4438 nfs4_set_lease_period(server->nfs_client,
4439 fsinfo->lease_time * HZ,
4440 now);
83ca7f5a
CL		 4441 break;
4442 }
4443 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 4444 } while (exception.retry);
4445 return err;
4446}
4447
4448static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4449{
e38eb650
BS		 4450 int error;
4451
0e574af1 4452 nfs_fattr_init(fsinfo->fattr);
e38eb650 4453 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 4454 if (error == 0) {
4455 /* block layout checks this! */
4456 server->pnfs_blksize = fsinfo->blksize;
ca440c38 4457 set_pnfs_layoutdriver(server, fhandle, fsinfo);
dc182549 4458 }
e38eb650
BS		 4459
4460 return error;
1da177e4
LT		 4461}
4462
4463static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4464 struct nfs_pathconf *pathconf)
4465{
4466 struct nfs4_pathconf_arg args = {
4467 .fh = fhandle,
4468 .bitmask = server->attr_bitmask,
4469 };
d45b2989
BH		 4470 struct nfs4_pathconf_res res = {
4471 .pathconf = pathconf,
4472 };
1da177e4
LT		 4473 struct rpc_message msg = {
4474 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
4475 .rpc_argp = &args,
d45b2989 4476 .rpc_resp = &res,
1da177e4
LT		 4477 };
4478
4479 /* None of the pathconf attributes are mandatory to implement */
4480 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
4481 memset(pathconf, 0, sizeof(*pathconf));
4482 return 0;
4483 }
4484
0e574af1 4485 nfs_fattr_init(pathconf->fattr);
7c513058 4486 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4487}
4488
4489static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4490 struct nfs_pathconf *pathconf)
4491{
4492 struct nfs4_exception exception = { };
4493 int err;
4494
4495 do {
4496 err = nfs4_handle_exception(server,
4497 _nfs4_proc_pathconf(server, fhandle, pathconf),
4498 &exception);
4499 } while (exception.retry);
4500 return err;
4501}
4502
5521abfd 4503int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 4504 const struct nfs_open_context *ctx,
4505 const struct nfs_lock_context *l_ctx,
4506 fmode_t fmode)
4507{
17393475 4508 return nfs4_select_rw_stateid(ctx->state, fmode, l_ctx, stateid, NULL);
9b206149
TM		 4509}
4510EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4511
5521abfd
TM		 4512static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4513 const struct nfs_open_context *ctx,
4514 const struct nfs_lock_context *l_ctx,
4515 fmode_t fmode)
4516{
4517 nfs4_stateid current_stateid;
4518
e1253be0
TM		 4519 /* If the current stateid represents a lost lock, then exit */
4520 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode) == -EIO)
4521 return true;
5521abfd
TM		 4522 return nfs4_stateid_match(stateid, &current_stateid);
4523}
4524
4525static bool nfs4_error_stateid_expired(int err)
4526{
4527 switch (err) {
4528 case -NFS4ERR_DELEG_REVOKED:
4529 case -NFS4ERR_ADMIN_REVOKED:
4530 case -NFS4ERR_BAD_STATEID:
4531 case -NFS4ERR_STALE_STATEID:
4532 case -NFS4ERR_OLD_STATEID:
4533 case -NFS4ERR_OPENMODE:
4534 case -NFS4ERR_EXPIRED:
4535 return true;
4536 }
4537 return false;
4538}
4539
d45f60c6 4540static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
1da177e4 4541{
d45f60c6 4542 struct nfs_server *server = NFS_SERVER(hdr->inode);
1da177e4 4543
d45f60c6 4544 trace_nfs4_read(hdr, task->tk_status);
9c27869d
TM		 4545 if (task->tk_status < 0) {
4546 struct nfs4_exception exception = {
4547 .inode = hdr->inode,
4548 .state = hdr->args.context->state,
4549 .stateid = &hdr->args.stateid,
4550 };
4551 task->tk_status = nfs4_async_handle_exception(task,
4552 server, task->tk_status, &exception);
4553 if (exception.retry) {
4554 rpc_restart_call_prepare(task);
4555 return -EAGAIN;
4556 }
1da177e4 4557 }
8850df99 4558
1da177e4 4559 if (task->tk_status > 0)
d45f60c6 4560 renew_lease(server, hdr->timestamp);
ec06c096 4561 return 0;
1da177e4
LT		 4562}
4563
5521abfd 4564static bool nfs4_read_stateid_changed(struct rpc_task *task,
3c6b899c 4565 struct nfs_pgio_args *args)
5521abfd
TM		 4566{
4567
4568 if (!nfs4_error_stateid_expired(task->tk_status) ||
4569 nfs4_stateid_is_current(&args->stateid,
4570 args->context,
4571 args->lock_context,
4572 FMODE_READ))
4573 return false;
4574 rpc_restart_call_prepare(task);
4575 return true;
4576}
4577
d45f60c6 4578static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
cbdabc7f
AA		 4579{
4580
4581 dprintk("--> %s\n", __func__);
4582
d45f60c6 4583 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
cbdabc7f 4584 return -EAGAIN;
d45f60c6 4585 if (nfs4_read_stateid_changed(task, &hdr->args))
5521abfd 4586 return -EAGAIN;
bfc505de
TM		 4587 if (task->tk_status > 0)
4588 nfs_invalidate_atime(hdr->inode);
d45f60c6
WAA		 4589 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4590 nfs4_read_done_cb(task, hdr);
cbdabc7f
AA		 4591}
4592
d45f60c6
WAA		 4593static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
4594 struct rpc_message *msg)
1da177e4 4595{
d45f60c6 4596 hdr->timestamp = jiffies;
ca857cc1
TM		 4597 if (!hdr->pgio_done_cb)
4598 hdr->pgio_done_cb = nfs4_read_done_cb;
bdc7f021 4599 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
d45f60c6 4600 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
1da177e4
LT		 4601}
4602
d45f60c6
WAA		 4603static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
4604 struct nfs_pgio_header *hdr)
ea7c3303 4605{
42e1cca7 4606 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode)->nfs_client,
d45f60c6
WAA		 4607 &hdr->args.seq_args,
4608 &hdr->res.seq_res,
9b206149 4609 task))
ef1820f9 4610 return 0;
d45f60c6
WAA		 4611 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
4612 hdr->args.lock_context,
4613 hdr->rw_ops->rw_mode) == -EIO)
ef1820f9 4614 return -EIO;
d45f60c6 4615 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
ef1820f9
N		 4616 return -EIO;
4617 return 0;
1da177e4
LT		 4618}
4619
d45f60c6
WAA		 4620static int nfs4_write_done_cb(struct rpc_task *task,
4621 struct nfs_pgio_header *hdr)
1da177e4 4622{
d45f60c6 4623 struct inode *inode = hdr->inode;
8478eaa1 4624
d45f60c6 4625 trace_nfs4_write(hdr, task->tk_status);
9c27869d
TM		 4626 if (task->tk_status < 0) {
4627 struct nfs4_exception exception = {
4628 .inode = hdr->inode,
4629 .state = hdr->args.context->state,
4630 .stateid = &hdr->args.stateid,
4631 };
4632 task->tk_status = nfs4_async_handle_exception(task,
4633 NFS_SERVER(inode), task->tk_status,
4634 &exception);
4635 if (exception.retry) {
4636 rpc_restart_call_prepare(task);
4637 return -EAGAIN;
4638 }
1da177e4 4639 }
4f9838c7 4640 if (task->tk_status >= 0) {
d45f60c6 4641 renew_lease(NFS_SERVER(inode), hdr->timestamp);
a08a8cd3 4642 nfs_writeback_update_inode(hdr);
4f9838c7 4643 }
788e7a89 4644 return 0;
1da177e4
LT		 4645}
4646
5521abfd 4647static bool nfs4_write_stateid_changed(struct rpc_task *task,
3c6b899c 4648 struct nfs_pgio_args *args)
5521abfd
TM		 4649{
4650
4651 if (!nfs4_error_stateid_expired(task->tk_status) ||
4652 nfs4_stateid_is_current(&args->stateid,
4653 args->context,
4654 args->lock_context,
4655 FMODE_WRITE))
4656 return false;
4657 rpc_restart_call_prepare(task);
4658 return true;
4659}
4660
d45f60c6 4661static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
b029bc9b 4662{
d45f60c6 4663 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
b029bc9b 4664 return -EAGAIN;
d45f60c6 4665 if (nfs4_write_stateid_changed(task, &hdr->args))
5521abfd 4666 return -EAGAIN;
d45f60c6
WAA		 4667 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4668 nfs4_write_done_cb(task, hdr);
b029bc9b
FI		 4669}
4670
5a37f851 4671static
d45f60c6 4672bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
a69aef14 4673{
5a37f851 4674 /* Don't request attributes for pNFS or O_DIRECT writes */
d45f60c6 4675 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
5a37f851
TM		 4676 return false;
4677 /* Otherwise, request attributes if and only if we don't hold
4678 * a delegation
4679 */
011e2a7f 4680 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 4681}
a69aef14 4682
d45f60c6
WAA		 4683static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
4684 struct rpc_message *msg)
1da177e4 4685{
d45f60c6 4686 struct nfs_server *server = NFS_SERVER(hdr->inode);
bdc7f021 4687
d45f60c6
WAA		 4688 if (!nfs4_write_need_cache_consistency_data(hdr)) {
4689 hdr->args.bitmask = NULL;
4690 hdr->res.fattr = NULL;
7ffd1064 4691 } else
d45f60c6 4692 hdr->args.bitmask = server->cache_consistency_bitmask;
5a37f851 4693
d45f60c6
WAA		 4694 if (!hdr->pgio_done_cb)
4695 hdr->pgio_done_cb = nfs4_write_done_cb;
4696 hdr->res.server = server;
4697 hdr->timestamp = jiffies;
1da177e4 4698
bdc7f021 4699 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
d45f60c6 4700 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
1da177e4
LT		 4701}
4702
0b7c0153 4703static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 4704{
42e1cca7 4705 nfs4_setup_sequence(NFS_SERVER(data->inode)->nfs_client,
d9afbd1b
TM		 4706 &data->args.seq_args,
4707 &data->res.seq_res,
4708 task);
1da177e4
LT		 4709}
4710
0b7c0153 4711static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 4712{
1da177e4 4713 struct inode *inode = data->inode;
14516c3a 4714
cc668ab3 4715 trace_nfs4_commit(data, task->tk_status);
8478eaa1
N		 4716 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4717 NULL, NULL) == -EAGAIN) {
d00c5d43 4718 rpc_restart_call_prepare(task);
788e7a89 4719 return -EAGAIN;
1da177e4 4720 }
788e7a89 4721 return 0;
1da177e4
LT		 4722}
4723
0b7c0153 4724static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 4725{
4726 if (!nfs4_sequence_done(task, &data->res.seq_res))
4727 return -EAGAIN;
0b7c0153 4728 return data->commit_done_cb(task, data);
5f452431
FI		 4729}
4730
0b7c0153 4731static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 4732{
788e7a89 4733 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 4734
0b7c0153
FI		 4735 if (data->commit_done_cb == NULL)
4736 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 4737 data->res.server = server;
bdc7f021 4738 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
a9c92d6b 4739 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4740}
4741
9bc4e3ca
CL		 4742struct nfs4_renewdata {
4743 struct nfs_client *client;
4744 unsigned long timestamp;
4745};
4746
1da177e4
LT		 4747/*
4748 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4749 * standalone procedure for queueing an asynchronous RENEW.
4750 */
9bc4e3ca 4751static void nfs4_renew_release(void *calldata)
dc96aef9 4752{
9bc4e3ca
CL		 4753 struct nfs4_renewdata *data = calldata;
4754 struct nfs_client *clp = data->client;
dc96aef9 4755
0851de06
AB		 4756 if (atomic_read(&clp->cl_count) > 1)
4757 nfs4_schedule_state_renewal(clp);
4758 nfs_put_client(clp);
9bc4e3ca 4759 kfree(data);
dc96aef9
AB		 4760}
4761
9bc4e3ca 4762static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 4763{
9bc4e3ca
CL		 4764 struct nfs4_renewdata *data = calldata;
4765 struct nfs_client *clp = data->client;
4766 unsigned long timestamp = data->timestamp;
1da177e4 4767
c6d01c6f 4768 trace_nfs4_renew_async(clp, task->tk_status);
f8aba1e8
CL		 4769 switch (task->tk_status) {
4770 case 0:
4771 break;
4772 case -NFS4ERR_LEASE_MOVED:
4773 nfs4_schedule_lease_moved_recovery(clp);
4774 break;
4775 default:
95baa25c 4776 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 4777 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4778 return;
4779 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 4780 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 4781 return;
4782 }
4783 nfs4_schedule_path_down_recovery(clp);
1da177e4 4784 }
452e9352 4785 do_renew_lease(clp, timestamp);
1da177e4
LT		 4786}
4787
963d8fe5
TM		 4788static const struct rpc_call_ops nfs4_renew_ops = {
4789 .rpc_call_done = nfs4_renew_done,
dc96aef9 4790 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 4791};
4792
2f60ea6b 4793static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 4794{
4795 struct rpc_message msg = {
4796 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4797 .rpc_argp = clp,
b4454fe1 4798 .rpc_cred = cred,
1da177e4 4799 };
9bc4e3ca 4800 struct nfs4_renewdata *data;
1da177e4 4801
2f60ea6b
TM		 4802 if (renew_flags == 0)
4803 return 0;
0851de06
AB		 4804 if (!atomic_inc_not_zero(&clp->cl_count))
4805 return -EIO;
b569ad34 4806 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 4807 if (data == NULL)
4808 return -ENOMEM;
4809 data->client = clp;
4810 data->timestamp = jiffies;
bc7a05ca 4811 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 4812 &nfs4_renew_ops, data);
1da177e4
LT		 4813}
4814
8534d4ec 4815static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 4816{
4817 struct rpc_message msg = {
4818 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4819 .rpc_argp = clp,
b4454fe1 4820 .rpc_cred = cred,
1da177e4
LT		 4821 };
4822 unsigned long now = jiffies;
4823 int status;
4824
bc7a05ca 4825 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4826 if (status < 0)
4827 return status;
452e9352 4828 do_renew_lease(clp, now);
1da177e4
LT		 4829 return 0;
4830}
4831
aa1870af
BF		 4832static inline int nfs4_server_supports_acls(struct nfs_server *server)
4833{
7dd7d959 4834 return server->caps & NFS_CAP_ACLS;
aa1870af
BF		 4835}
4836
21f498c2
TM		 4837/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4838 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 4839 * the stack.
4840 */
21f498c2 4841#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 4842
e9e3d724 4843static int buf_to_pages_noslab(const void *buf, size_t buflen,
8fbcf237 4844 struct page **pages)
e9e3d724
NH		 4845{
4846 struct page *newpage, **spages;
4847 int rc = 0;
4848 size_t len;
4849 spages = pages;
4850
4851 do {
21f498c2 4852 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 4853 newpage = alloc_page(GFP_KERNEL);
4854
4855 if (newpage == NULL)
4856 goto unwind;
4857 memcpy(page_address(newpage), buf, len);
d9b67e1e
AS		 4858 buf += len;
4859 buflen -= len;
e9e3d724
NH		 4860 *pages++ = newpage;
4861 rc++;
4862 } while (buflen != 0);
4863
4864 return rc;
4865
4866unwind:
4867 for(; rc > 0; rc--)
4868 __free_page(spages[rc-1]);
4869 return -ENOMEM;
4870}
4871
e50a1c2e
BF		 4872struct nfs4_cached_acl {
4873 int cached;
4874 size_t len;
3e9d4154 4875 char data[0];
e50a1c2e
BF		 4876};
4877
4878static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4879{
4880 struct nfs_inode *nfsi = NFS_I(inode);
4881
4882 spin_lock(&inode->i_lock);
4883 kfree(nfsi->nfs4_acl);
4884 nfsi->nfs4_acl = acl;
4885 spin_unlock(&inode->i_lock);
4886}
4887
4888static void nfs4_zap_acl_attr(struct inode *inode)
4889{
4890 nfs4_set_cached_acl(inode, NULL);
4891}
4892
4893static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4894{
4895 struct nfs_inode *nfsi = NFS_I(inode);
4896 struct nfs4_cached_acl *acl;
4897 int ret = -ENOENT;
4898
4899 spin_lock(&inode->i_lock);
4900 acl = nfsi->nfs4_acl;
4901 if (acl == NULL)
4902 goto out;
4903 if (buf == NULL) /* user is just asking for length */
4904 goto out_len;
4905 if (acl->cached == 0)
4906 goto out;
4907 ret = -ERANGE; /* see getxattr(2) man page */
4908 if (acl->len > buflen)
4909 goto out;
4910 memcpy(buf, acl->data, acl->len);
4911out_len:
4912 ret = acl->len;
4913out:
4914 spin_unlock(&inode->i_lock);
4915 return ret;
4916}
4917
5794d21e 4918static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 4919{
4920 struct nfs4_cached_acl *acl;
b291f1b1 4921 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 4922
1f1ea6c2 4923 if (buflen <= PAGE_SIZE) {
b291f1b1 4924 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 4925 if (acl == NULL)
4926 goto out;
4927 acl->cached = 1;
5794d21e 4928 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 4929 } else {
4930 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4931 if (acl == NULL)
4932 goto out;
4933 acl->cached = 0;
4934 }
4935 acl->len = acl_len;
4936out:
4937 nfs4_set_cached_acl(inode, acl);
4938}
4939
bf118a34
AA		 4940/*
4941 * The getxattr API returns the required buffer length when called with a
4942 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4943 * the required buf. On a NULL buf, we send a page of data to the server
4944 * guessing that the ACL request can be serviced by a page. If so, we cache
4945 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4946 * the cache. If not so, we throw away the page, and cache the required
4947 * length. The next getxattr call will then produce another round trip to
4948 * the server, this time with the input buf of the required size.
4949 */
16b4289c 4950static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 4951{
ed92d8c1 4952 struct page *pages[NFS4ACL_MAXPAGES + 1] = {NULL, };
aa1870af
BF		 4953 struct nfs_getaclargs args = {
4954 .fh = NFS_FH(inode),
4955 .acl_pages = pages,
4956 .acl_len = buflen,
4957 };
663c79b3
BH		 4958 struct nfs_getaclres res = {
4959 .acl_len = buflen,
4960 };
aa1870af
BF		 4961 struct rpc_message msg = {
4962 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4963 .rpc_argp = &args,
663c79b3 4964 .rpc_resp = &res,
aa1870af 4965 };
ed92d8c1 4966 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE) + 1;
21f498c2 4967 int ret = -ENOMEM, i;
aa1870af 4968
21f498c2
TM		 4969 if (npages > ARRAY_SIZE(pages))
4970 return -ERANGE;
5a006899 4971
bf118a34
AA		 4972 for (i = 0; i < npages; i++) {
4973 pages[i] = alloc_page(GFP_KERNEL);
4974 if (!pages[i])
4975 goto out_free;
e50a1c2e 4976 }
5a006899
SP		 4977
4978 /* for decoding across pages */
4979 res.acl_scratch = alloc_page(GFP_KERNEL);
4980 if (!res.acl_scratch)
4981 goto out_free;
4982
bf118a34 4983 args.acl_len = npages * PAGE_SIZE;
5a006899 4984
de040bec 4985 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 4986 __func__, buf, buflen, npages, args.acl_len);
4987 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4988 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 4989 if (ret)
4990 goto out_free;
bf118a34 4991
1f1ea6c2
TM		 4992 /* Handle the case where the passed-in buffer is too short */
4993 if (res.acl_flags & NFS4_ACL_TRUNC) {
4994 /* Did the user only issue a request for the acl length? */
4995 if (buf == NULL)
4996 goto out_ok;
e50a1c2e 4997 ret = -ERANGE;
1f1ea6c2 4998 goto out_free;
e50a1c2e 4999 }
1f1ea6c2 5000 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 5001 if (buf) {
5002 if (res.acl_len > buflen) {
5003 ret = -ERANGE;
5004 goto out_free;
5005 }
1f1ea6c2 5006 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 5007 }
1f1ea6c2
TM		 5008out_ok:
5009 ret = res.acl_len;
e50a1c2e 5010out_free:
bf118a34
AA		 5011 for (i = 0; i < npages; i++)
5012 if (pages[i])
5013 __free_page(pages[i]);
331818f1
TM		 5014 if (res.acl_scratch)
5015 __free_page(res.acl_scratch);
aa1870af
BF		 5016 return ret;
5017}
5018
16b4289c
TM		 5019static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
5020{
5021 struct nfs4_exception exception = { };
5022 ssize_t ret;
5023 do {
5024 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
c1578b76 5025 trace_nfs4_get_acl(inode, ret);
16b4289c
TM		 5026 if (ret >= 0)
5027 break;
5028 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
5029 } while (exception.retry);
5030 return ret;
5031}
5032
e50a1c2e
BF		 5033static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
5034{
5035 struct nfs_server *server = NFS_SERVER(inode);
5036 int ret;
5037
5038 if (!nfs4_server_supports_acls(server))
5039 return -EOPNOTSUPP;
5040 ret = nfs_revalidate_inode(server, inode);
5041 if (ret < 0)
5042 return ret;
08a22b39
AK		 5043 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
5044 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 5045 ret = nfs4_read_cached_acl(inode, buf, buflen);
5046 if (ret != -ENOENT)
bf118a34
AA		 5047 /* -ENOENT is returned if there is no ACL or if there is an ACL
5048 * but no cached acl data, just the acl length */
e50a1c2e
BF		 5049 return ret;
5050 return nfs4_get_acl_uncached(inode, buf, buflen);
5051}
5052
16b4289c 5053static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 5054{
5055 struct nfs_server *server = NFS_SERVER(inode);
5056 struct page *pages[NFS4ACL_MAXPAGES];
5057 struct nfs_setaclargs arg = {
5058 .fh = NFS_FH(inode),
5059 .acl_pages = pages,
5060 .acl_len = buflen,
5061 };
73c403a9 5062 struct nfs_setaclres res;
4b580ee3
BF		 5063 struct rpc_message msg = {
5064 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
5065 .rpc_argp = &arg,
73c403a9 5066 .rpc_resp = &res,
4b580ee3 5067 };
21f498c2 5068 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 5069 int ret, i;
4b580ee3
BF		 5070
5071 if (!nfs4_server_supports_acls(server))
5072 return -EOPNOTSUPP;
21f498c2
TM		 5073 if (npages > ARRAY_SIZE(pages))
5074 return -ERANGE;
8fbcf237 5075 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages);
e9e3d724
NH		 5076 if (i < 0)
5077 return i;
57ec14c5 5078 nfs4_inode_return_delegation(inode);
7c513058 5079 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 5080
5081 /*
5082 * Free each page after tx, so the only ref left is
5083 * held by the network stack
5084 */
5085 for (; i > 0; i--)
5086 put_page(pages[i-1]);
5087
08a22b39
AK		 5088 /*
5089 * Acl update can result in inode attribute update.
5090 * so mark the attribute cache invalid.
5091 */
5092 spin_lock(&inode->i_lock);
5093 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
5094 spin_unlock(&inode->i_lock);
f41f7418
TM		 5095 nfs_access_zap_cache(inode);
5096 nfs_zap_acl_cache(inode);
4b580ee3
BF		 5097 return ret;
5098}
5099
16b4289c
TM		 5100static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
5101{
5102 struct nfs4_exception exception = { };
5103 int err;
5104 do {
c1578b76
TM		 5105 err = __nfs4_proc_set_acl(inode, buf, buflen);
5106 trace_nfs4_set_acl(inode, err);
5107 err = nfs4_handle_exception(NFS_SERVER(inode), err,
16b4289c
TM		 5108 &exception);
5109 } while (exception.retry);
5110 return err;
5111}
5112
aa9c2669
DQ		 5113#ifdef CONFIG_NFS_V4_SECURITY_LABEL
5114static int _nfs4_get_security_label(struct inode *inode, void *buf,
5115 size_t buflen)
5116{
5117 struct nfs_server *server = NFS_SERVER(inode);
5118 struct nfs_fattr fattr;
5119 struct nfs4_label label = {0, 0, buflen, buf};
5120
5121 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
fcb63a9b 5122 struct nfs4_getattr_arg arg = {
aa9c2669
DQ		 5123 .fh = NFS_FH(inode),
5124 .bitmask = bitmask,
5125 };
5126 struct nfs4_getattr_res res = {
5127 .fattr = &fattr,
5128 .label = &label,
5129 .server = server,
5130 };
5131 struct rpc_message msg = {
5132 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
fcb63a9b 5133 .rpc_argp = &arg,
aa9c2669
DQ		 5134 .rpc_resp = &res,
5135 };
5136 int ret;
5137
5138 nfs_fattr_init(&fattr);
5139
fcb63a9b 5140 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
aa9c2669
DQ		 5141 if (ret)
5142 return ret;
5143 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
5144 return -ENOENT;
5145 if (buflen < label.len)
5146 return -ERANGE;
5147 return 0;
5148}
5149
5150static int nfs4_get_security_label(struct inode *inode, void *buf,
5151 size_t buflen)
5152{
5153 struct nfs4_exception exception = { };
5154 int err;
5155
5156 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
5157 return -EOPNOTSUPP;
5158
5159 do {
c1578b76
TM		 5160 err = _nfs4_get_security_label(inode, buf, buflen);
5161 trace_nfs4_get_security_label(inode, err);
5162 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 5163 &exception);
5164 } while (exception.retry);
5165 return err;
5166}
5167
5168static int _nfs4_do_set_security_label(struct inode *inode,
5169 struct nfs4_label *ilabel,
5170 struct nfs_fattr *fattr,
5171 struct nfs4_label *olabel)
5172{
5173
5174 struct iattr sattr = {0};
5175 struct nfs_server *server = NFS_SERVER(inode);
5176 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
12207f69 5177 struct nfs_setattrargs arg = {
d9b67e1e
AS		 5178 .fh = NFS_FH(inode),
5179 .iap = &sattr,
aa9c2669
DQ		 5180 .server = server,
5181 .bitmask = bitmask,
5182 .label = ilabel,
5183 };
5184 struct nfs_setattrres res = {
5185 .fattr = fattr,
5186 .label = olabel,
5187 .server = server,
5188 };
5189 struct rpc_message msg = {
d9b67e1e
AS		 5190 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
5191 .rpc_argp = &arg,
5192 .rpc_resp = &res,
aa9c2669
DQ		 5193 };
5194 int status;
5195
12207f69 5196 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
aa9c2669 5197
12207f69 5198 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
aa9c2669
DQ		 5199 if (status)
5200 dprintk("%s failed: %d\n", __func__, status);
5201
5202 return status;
5203}
5204
5205static int nfs4_do_set_security_label(struct inode *inode,
5206 struct nfs4_label *ilabel,
5207 struct nfs_fattr *fattr,
5208 struct nfs4_label *olabel)
5209{
5210 struct nfs4_exception exception = { };
5211 int err;
5212
5213 do {
c1578b76
TM		 5214 err = _nfs4_do_set_security_label(inode, ilabel,
5215 fattr, olabel);
5216 trace_nfs4_set_security_label(inode, err);
5217 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 5218 &exception);
5219 } while (exception.retry);
5220 return err;
5221}
5222
5223static int
59301226 5224nfs4_set_security_label(struct inode *inode, const void *buf, size_t buflen)
aa9c2669
DQ		 5225{
5226 struct nfs4_label ilabel, *olabel = NULL;
5227 struct nfs_fattr fattr;
5228 struct rpc_cred *cred;
aa9c2669
DQ		 5229 int status;
5230
5231 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
5232 return -EOPNOTSUPP;
5233
5234 nfs_fattr_init(&fattr);
5235
5236 ilabel.pi = 0;
5237 ilabel.lfs = 0;
5238 ilabel.label = (char *)buf;
5239 ilabel.len = buflen;
5240
5241 cred = rpc_lookup_cred();
5242 if (IS_ERR(cred))
5243 return PTR_ERR(cred);
5244
5245 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
5246 if (IS_ERR(olabel)) {
5247 status = -PTR_ERR(olabel);
5248 goto out;
5249 }
5250
5251 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
5252 if (status == 0)
5253 nfs_setsecurity(inode, &fattr, olabel);
5254
5255 nfs4_label_free(olabel);
5256out:
5257 put_rpccred(cred);
5258 return status;
5259}
5260#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
5261
5262
f092075d
CL		 5263static void nfs4_init_boot_verifier(const struct nfs_client *clp,
5264 nfs4_verifier *bootverf)
cd93710e
CL		 5265{
5266 __be32 verf[2];
5267
2c820d9a
CL		 5268 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
5269 /* An impossible timestamp guarantees this value
5270 * will never match a generated boot time. */
2f86e091
DD		 5271 verf[0] = cpu_to_be32(U32_MAX);
5272 verf[1] = cpu_to_be32(U32_MAX);
2c820d9a 5273 } else {
f092075d 5274 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
2f86e091
DD		 5275 u64 ns = ktime_to_ns(nn->boot_time);
5276
5277 verf[0] = cpu_to_be32(ns >> 32);
5278 verf[1] = cpu_to_be32(ns);
2c820d9a 5279 }
cd93710e
CL		 5280 memcpy(bootverf->data, verf, sizeof(bootverf->data));
5281}
5282
a3192688
JL		 5283static int
5284nfs4_init_nonuniform_client_string(struct nfs_client *clp)
e984a55a 5285{
a3192688
JL		 5286 size_t len;
5287 char *str;
e984a55a 5288
ceb3a16c 5289 if (clp->cl_owner_id != NULL)
a3192688 5290 return 0;
4a3e5779 5291
a3192688 5292 rcu_read_lock();
4a70316c 5293 len = 14 + strlen(clp->cl_ipaddr) + 1 +
a3192688
JL		 5294 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) +
5295 1 +
5296 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO)) +
5297 1;
5298 rcu_read_unlock();
5299
5300 if (len > NFS4_OPAQUE_LIMIT + 1)
5301 return -EINVAL;
5302
5303 /*
5304 * Since this string is allocated at mount time, and held until the
5305 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5306 * about a memory-reclaim deadlock.
5307 */
5308 str = kmalloc(len, GFP_KERNEL);
5309 if (!str)
5310 return -ENOMEM;
ceb3a16c 5311
e984a55a 5312 rcu_read_lock();
f2dd436e 5313 scnprintf(str, len, "Linux NFSv4.0 %s/%s %s",
a3192688
JL		 5314 clp->cl_ipaddr,
5315 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR),
5316 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO));
e984a55a 5317 rcu_read_unlock();
a3192688 5318
a3192688
JL		 5319 clp->cl_owner_id = str;
5320 return 0;
e984a55a
CL		 5321}
5322
873e3851
JL		 5323static int
5324nfs4_init_uniquifier_client_string(struct nfs_client *clp)
5325{
873e3851
JL		 5326 size_t len;
5327 char *str;
5328
5329 len = 10 + 10 + 1 + 10 + 1 +
5330 strlen(nfs4_client_id_uniquifier) + 1 +
5331 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5332
5333 if (len > NFS4_OPAQUE_LIMIT + 1)
5334 return -EINVAL;
5335
5336 /*
5337 * Since this string is allocated at mount time, and held until the
5338 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5339 * about a memory-reclaim deadlock.
5340 */
5341 str = kmalloc(len, GFP_KERNEL);
5342 if (!str)
5343 return -ENOMEM;
5344
f2dd436e 5345 scnprintf(str, len, "Linux NFSv%u.%u %s/%s",
873e3851
JL		 5346 clp->rpc_ops->version, clp->cl_minorversion,
5347 nfs4_client_id_uniquifier,
5348 clp->cl_rpcclient->cl_nodename);
873e3851
JL		 5349 clp->cl_owner_id = str;
5350 return 0;
5351}
5352
5353static int
5354nfs4_init_uniform_client_string(struct nfs_client *clp)
e984a55a 5355{
873e3851
JL		 5356 size_t len;
5357 char *str;
ceb3a16c
TM		 5358
5359 if (clp->cl_owner_id != NULL)
873e3851 5360 return 0;
6f2ea7f2
CL		 5361
5362 if (nfs4_client_id_uniquifier[0] != '\0')
873e3851
JL		 5363 return nfs4_init_uniquifier_client_string(clp);
5364
5365 len = 10 + 10 + 1 + 10 + 1 +
5366 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5367
5368 if (len > NFS4_OPAQUE_LIMIT + 1)
5369 return -EINVAL;
5370
5371 /*
5372 * Since this string is allocated at mount time, and held until the
5373 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5374 * about a memory-reclaim deadlock.
5375 */
5376 str = kmalloc(len, GFP_KERNEL);
5377 if (!str)
5378 return -ENOMEM;
5379
f2dd436e 5380 scnprintf(str, len, "Linux NFSv%u.%u %s",
873e3851
JL		 5381 clp->rpc_ops->version, clp->cl_minorversion,
5382 clp->cl_rpcclient->cl_nodename);
873e3851
JL		 5383 clp->cl_owner_id = str;
5384 return 0;
e984a55a
CL		 5385}
5386
706cb8db
CL		 5387/*
5388 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
5389 * services. Advertise one based on the address family of the
5390 * clientaddr.
5391 */
5392static unsigned int
5393nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
5394{
5395 if (strchr(clp->cl_ipaddr, ':') != NULL)
5396 return scnprintf(buf, len, "tcp6");
5397 else
5398 return scnprintf(buf, len, "tcp");
5399}
5400
f11b2a1c
JL		 5401static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
5402{
5403 struct nfs4_setclientid *sc = calldata;
5404
5405 if (task->tk_status == 0)
5406 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
5407}
5408
5409static const struct rpc_call_ops nfs4_setclientid_ops = {
5410 .rpc_call_done = nfs4_setclientid_done,
5411};
5412
6bbb4ae8
CL		 5413/**
5414 * nfs4_proc_setclientid - Negotiate client ID
5415 * @clp: state data structure
5416 * @program: RPC program for NFSv4 callback service
5417 * @port: IP port number for NFS4 callback service
5418 * @cred: RPC credential to use for this call
5419 * @res: where to place the result
5420 *
5421 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5422 */
bb8b27e5
TM		 5423int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
5424 unsigned short port, struct rpc_cred *cred,
5425 struct nfs4_setclientid_res *res)
1da177e4
LT		 5426{
5427 nfs4_verifier sc_verifier;
5428 struct nfs4_setclientid setclientid = {
5429 .sc_verifier = &sc_verifier,
5430 .sc_prog = program,
3a6bb738 5431 .sc_clnt = clp,
1da177e4
LT		 5432 };
5433 struct rpc_message msg = {
5434 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
5435 .rpc_argp = &setclientid,
bb8b27e5 5436 .rpc_resp = res,
286d7d6a 5437 .rpc_cred = cred,
1da177e4 5438 };
f11b2a1c
JL		 5439 struct rpc_task *task;
5440 struct rpc_task_setup task_setup_data = {
5441 .rpc_client = clp->cl_rpcclient,
5442 .rpc_message = &msg,
5443 .callback_ops = &nfs4_setclientid_ops,
5444 .callback_data = &setclientid,
5445 .flags = RPC_TASK_TIMEOUT,
5446 };
6bbb4ae8 5447 int status;
1da177e4 5448
de734831 5449 /* nfs_client_id4 */
f092075d 5450 nfs4_init_boot_verifier(clp, &sc_verifier);
873e3851
JL		 5451
5452 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
5453 status = nfs4_init_uniform_client_string(clp);
5454 else
a3192688 5455 status = nfs4_init_nonuniform_client_string(clp);
873e3851
JL		 5456
5457 if (status)
5458 goto out;
3a6bb738 5459
de734831 5460 /* cb_client4 */
706cb8db
CL		 5461 setclientid.sc_netid_len =
5462 nfs4_init_callback_netid(clp,
5463 setclientid.sc_netid,
5464 sizeof(setclientid.sc_netid));
de734831 5465 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 5466 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 5467 clp->cl_ipaddr, port >> 8, port & 255);
5468
3a6bb738 5469 dprintk("NFS call setclientid auth=%s, '%s'\n",
6bbb4ae8 5470 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3a6bb738 5471 clp->cl_owner_id);
f11b2a1c
JL		 5472 task = rpc_run_task(&task_setup_data);
5473 if (IS_ERR(task)) {
5474 status = PTR_ERR(task);
5475 goto out;
5476 }
5477 status = task->tk_status;
5478 if (setclientid.sc_cred) {
5479 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
5480 put_rpccred(setclientid.sc_cred);
5481 }
5482 rpc_put_task(task);
5483out:
c6d01c6f 5484 trace_nfs4_setclientid(clp, status);
6bbb4ae8
CL		 5485 dprintk("NFS reply setclientid: %d\n", status);
5486 return status;
1da177e4
LT		 5487}
5488
6bbb4ae8
CL		 5489/**
5490 * nfs4_proc_setclientid_confirm - Confirm client ID
5491 * @clp: state data structure
5492 * @res: result of a previous SETCLIENTID
5493 * @cred: RPC credential to use for this call
5494 *
5495 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5496 */
fd954ae1 5497int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 5498 struct nfs4_setclientid_res *arg,
5499 struct rpc_cred *cred)
1da177e4 5500{
1da177e4
LT		 5501 struct rpc_message msg = {
5502 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 5503 .rpc_argp = arg,
286d7d6a 5504 .rpc_cred = cred,
1da177e4 5505 };
1da177e4
LT		 5506 int status;
5507
6bbb4ae8
CL		 5508 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
5509 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5510 clp->cl_clientid);
1bd714f2 5511 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 5512 trace_nfs4_setclientid_confirm(clp, status);
6bbb4ae8 5513 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 5514 return status;
5515}
5516
fe650407
TM		 5517struct nfs4_delegreturndata {
5518 struct nfs4_delegreturnargs args;
fa178f29 5519 struct nfs4_delegreturnres res;
fe650407
TM		 5520 struct nfs_fh fh;
5521 nfs4_stateid stateid;
26e976a8 5522 unsigned long timestamp;
586f1c39
TM		 5523 struct {
5524 struct nfs4_layoutreturn_args arg;
5525 struct nfs4_layoutreturn_res res;
4d796d75 5526 struct nfs4_xdr_opaque_data ld_private;
586f1c39
TM		 5527 u32 roc_barrier;
5528 bool roc;
5529 } lr;
fa178f29 5530 struct nfs_fattr fattr;
fe650407 5531 int rpc_status;
039b756a 5532 struct inode *inode;
fe650407
TM		 5533};
5534
fe650407
TM		 5535static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
5536{
5537 struct nfs4_delegreturndata *data = calldata;
938e1010 5538
14516c3a
TM		 5539 if (!nfs4_sequence_done(task, &data->res.seq_res))
5540 return;
938e1010 5541
ca8acf8d 5542 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
586f1c39
TM		 5543
5544 /* Handle Layoutreturn errors */
5545 if (data->args.lr_args && task->tk_status != 0) {
5546 switch(data->res.lr_ret) {
5547 default:
5548 data->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
5549 break;
5550 case 0:
5551 data->args.lr_args = NULL;
5552 data->res.lr_res = NULL;
5553 break;
5554 case -NFS4ERR_ADMIN_REVOKED:
5555 case -NFS4ERR_DELEG_REVOKED:
5556 case -NFS4ERR_EXPIRED:
5557 case -NFS4ERR_BAD_STATEID:
5558 case -NFS4ERR_OLD_STATEID:
5559 case -NFS4ERR_UNKNOWN_LAYOUTTYPE:
5560 case -NFS4ERR_WRONG_CRED:
5561 data->args.lr_args = NULL;
5562 data->res.lr_res = NULL;
5563 data->res.lr_ret = 0;
5564 rpc_restart_call_prepare(task);
5565 return;
5566 }
5567 }
5568
79708861 5569 switch (task->tk_status) {
79708861 5570 case 0:
fa178f29 5571 renew_lease(data->res.server, data->timestamp);
23ea44c2 5572 break;
c97cf606
TM		 5573 case -NFS4ERR_ADMIN_REVOKED:
5574 case -NFS4ERR_DELEG_REVOKED:
26d36301
TM		 5575 case -NFS4ERR_EXPIRED:
5576 nfs4_free_revoked_stateid(data->res.server,
5577 data->args.stateid,
5578 task->tk_msg.rpc_cred);
c97cf606
TM		 5579 case -NFS4ERR_BAD_STATEID:
5580 case -NFS4ERR_OLD_STATEID:
5581 case -NFS4ERR_STALE_STATEID:
c97cf606
TM		 5582 task->tk_status = 0;
5583 break;
8ac2b422
TM		 5584 case -NFS4ERR_ACCESS:
5585 if (data->args.bitmask) {
5586 data->args.bitmask = NULL;
5587 data->res.fattr = NULL;
5588 task->tk_status = 0;
5589 rpc_restart_call_prepare(task);
5590 return;
5591 }
79708861 5592 default:
8478eaa1
N		 5593 if (nfs4_async_handle_error(task, data->res.server,
5594 NULL, NULL) == -EAGAIN) {
d00c5d43 5595 rpc_restart_call_prepare(task);
79708861
RL		 5596 return;
5597 }
5598 }
5599 data->rpc_status = task->tk_status;
fe650407
TM		 5600}
5601
5602static void nfs4_delegreturn_release(void *calldata)
5603{
039b756a 5604 struct nfs4_delegreturndata *data = calldata;
ea7c38fe 5605 struct inode *inode = data->inode;
039b756a 5606
ea7c38fe 5607 if (inode) {
586f1c39 5608 if (data->lr.roc)
1c5bd76d
TM		 5609 pnfs_roc_release(&data->lr.arg, &data->lr.res,
5610 data->res.lr_ret);
0bc2c9b4 5611 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
ea7c38fe
TM		 5612 nfs_iput_and_deactive(inode);
5613 }
fe650407
TM		 5614 kfree(calldata);
5615}
5616
938e1010
AA		 5617static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5618{
5619 struct nfs4_delegreturndata *d_data;
5620
5621 d_data = (struct nfs4_delegreturndata *)data;
5622
1c5bd76d 5623 if (!d_data->lr.roc && nfs4_wait_on_layoutreturn(d_data->inode, task))
500d701f
PT		 5624 return;
5625
42e1cca7 5626 nfs4_setup_sequence(d_data->res.server->nfs_client,
d9afbd1b
TM		 5627 &d_data->args.seq_args,
5628 &d_data->res.seq_res,
5629 task);
938e1010 5630}
938e1010 5631
c8d149f3 5632static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010 5633 .rpc_call_prepare = nfs4_delegreturn_prepare,
fe650407
TM		 5634 .rpc_call_done = nfs4_delegreturn_done,
5635 .rpc_release = nfs4_delegreturn_release,
5636};
5637
e6f81075 5638static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 5639{
5640 struct nfs4_delegreturndata *data;
fa178f29 5641 struct nfs_server *server = NFS_SERVER(inode);
fe650407 5642 struct rpc_task *task;
5138fde0
TM		 5643 struct rpc_message msg = {
5644 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5645 .rpc_cred = cred,
5646 };
c970aa85
TM		 5647 struct rpc_task_setup task_setup_data = {
5648 .rpc_client = server->client,
5138fde0 5649 .rpc_message = &msg,
c970aa85
TM		 5650 .callback_ops = &nfs4_delegreturn_ops,
5651 .flags = RPC_TASK_ASYNC,
5652 };
e6f81075 5653 int status = 0;
fe650407 5654
8535b2be 5655 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 5656 if (data == NULL)
5657 return -ENOMEM;
a9c92d6b 5658 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
99ade3c7
AE		 5659
5660 nfs4_state_protect(server->nfs_client,
5661 NFS_SP4_MACH_CRED_CLEANUP,
5662 &task_setup_data.rpc_client, &msg);
5663
fe650407
TM		 5664 data->args.fhandle = &data->fh;
5665 data->args.stateid = &data->stateid;
9e907fec 5666 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 5667 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 5668 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 5669 data->res.fattr = &data->fattr;
5670 data->res.server = server;
586f1c39 5671 data->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
4d796d75 5672 data->lr.arg.ld_private = &data->lr.ld_private;
5138fde0 5673 nfs_fattr_init(data->res.fattr);
26e976a8 5674 data->timestamp = jiffies;
fe650407 5675 data->rpc_status = 0;
53e6fc86 5676 data->lr.roc = pnfs_roc(inode, &data->lr.arg, &data->lr.res, cred);
ea7c38fe 5677 data->inode = nfs_igrab_and_active(inode);
1c5bd76d 5678 if (data->inode) {
1c5bd76d
TM		 5679 if (data->lr.roc) {
5680 data->args.lr_args = &data->lr.arg;
5681 data->res.lr_res = &data->lr.res;
5682 }
53e6fc86
TM		 5683 } else if (data->lr.roc) {
5684 pnfs_roc_release(&data->lr.arg, &data->lr.res, 0);
5685 data->lr.roc = false;
1c5bd76d 5686 }
fe650407 5687
c970aa85 5688 task_setup_data.callback_data = data;
1174dd1f
TM		 5689 msg.rpc_argp = &data->args;
5690 msg.rpc_resp = &data->res;
c970aa85 5691 task = rpc_run_task(&task_setup_data);
7a1218a2 5692 if (IS_ERR(task))
fe650407 5693 return PTR_ERR(task);
e6f81075
TM		 5694 if (!issync)
5695 goto out;
820bf85c 5696 status = rpc_wait_for_completion_task(task);
e6f81075
TM		 5697 if (status != 0)
5698 goto out;
5699 status = data->rpc_status;
e6f81075 5700out:
e6b3c4db 5701 rpc_put_task(task);
fe650407 5702 return status;
1da177e4
LT		 5703}
5704
e6f81075 5705int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 5706{
5707 struct nfs_server *server = NFS_SERVER(inode);
5708 struct nfs4_exception exception = { };
5709 int err;
5710 do {
e6f81075 5711 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
48c9579a 5712 trace_nfs4_delegreturn(inode, stateid, err);
1da177e4
LT		 5713 switch (err) {
5714 case -NFS4ERR_STALE_STATEID:
5715 case -NFS4ERR_EXPIRED:
1da177e4
LT		 5716 case 0:
5717 return 0;
5718 }
5719 err = nfs4_handle_exception(server, err, &exception);
5720 } while (exception.retry);
5721 return err;
5722}
5723
1da177e4
LT		 5724static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5725{
5726 struct inode *inode = state->inode;
5727 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 5728 struct nfs_client *clp = server->nfs_client;
911d1aaf 5729 struct nfs_lockt_args arg = {
1da177e4 5730 .fh = NFS_FH(inode),
911d1aaf 5731 .fl = request,
1da177e4 5732 };
911d1aaf
TM		 5733 struct nfs_lockt_res res = {
5734 .denied = request,
1da177e4
LT		 5735 };
5736 struct rpc_message msg = {
5737 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
d9b67e1e
AS		 5738 .rpc_argp = &arg,
5739 .rpc_resp = &res,
1da177e4
LT		 5740 .rpc_cred = state->owner->so_cred,
5741 };
1da177e4
LT		 5742 struct nfs4_lock_state *lsp;
5743 int status;
5744
911d1aaf 5745 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 5746 status = nfs4_set_lock_state(state, request);
5747 if (status != 0)
5748 goto out;
5749 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 5750 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5751 arg.lock_owner.s_dev = server->s_dev;
7c513058 5752 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 5753 switch (status) {
5754 case 0:
5755 request->fl_type = F_UNLCK;
5756 break;
5757 case -NFS4ERR_DENIED:
5758 status = 0;
1da177e4 5759 }
70cc6487 5760 request->fl_ops->fl_release_private(request);
a6f951dd 5761 request->fl_ops = NULL;
8d0a8a9d 5762out:
1da177e4
LT		 5763 return status;
5764}
5765
5766static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5767{
5768 struct nfs4_exception exception = { };
5769 int err;
5770
5771 do {
d1b748a5
TM		 5772 err = _nfs4_proc_getlk(state, cmd, request);
5773 trace_nfs4_get_lock(request, state, cmd, err);
5774 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
1da177e4
LT		 5775 &exception);
5776 } while (exception.retry);
5777 return err;
5778}
5779
faf5f49c 5780struct nfs4_unlockdata {
911d1aaf
TM		 5781 struct nfs_locku_args arg;
5782 struct nfs_locku_res res;
faf5f49c
TM		 5783 struct nfs4_lock_state *lsp;
5784 struct nfs_open_context *ctx;
911d1aaf 5785 struct file_lock fl;
516285eb 5786 struct nfs_server *server;
26e976a8 5787 unsigned long timestamp;
faf5f49c
TM		 5788};
5789
911d1aaf
TM		 5790static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5791 struct nfs_open_context *ctx,
5792 struct nfs4_lock_state *lsp,
5793 struct nfs_seqid *seqid)
5794{
5795 struct nfs4_unlockdata *p;
5796 struct inode *inode = lsp->ls_state->inode;
5797
8535b2be 5798 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 5799 if (p == NULL)
5800 return NULL;
5801 p->arg.fh = NFS_FH(inode);
5802 p->arg.fl = &p->fl;
5803 p->arg.seqid = seqid;
c1d51931 5804 p->res.seqid = seqid;
911d1aaf
TM		 5805 p->lsp = lsp;
5806 atomic_inc(&lsp->ls_count);
5807 /* Ensure we don't close file until we're done freeing locks! */
5808 p->ctx = get_nfs_open_context(ctx);
5809 memcpy(&p->fl, fl, sizeof(p->fl));
5810 p->server = NFS_SERVER(inode);
5811 return p;
5812}
5813
06f814a3 5814static void nfs4_locku_release_calldata(void *data)
faf5f49c 5815{
963d8fe5 5816 struct nfs4_unlockdata *calldata = data;
911d1aaf 5817 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 5818 nfs4_put_lock_state(calldata->lsp);
5819 put_nfs_open_context(calldata->ctx);
5820 kfree(calldata);
faf5f49c
TM		 5821}
5822
963d8fe5 5823static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 5824{
963d8fe5 5825 struct nfs4_unlockdata *calldata = data;
faf5f49c 5826
14516c3a
TM		 5827 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5828 return;
faf5f49c
TM		 5829 switch (task->tk_status) {
5830 case 0:
26e976a8 5831 renew_lease(calldata->server, calldata->timestamp);
75575ddf 5832 locks_lock_inode_wait(calldata->lsp->ls_state->inode, &calldata->fl);
c69899a1
TM		 5833 if (nfs4_update_lock_stateid(calldata->lsp,
5834 &calldata->res.stateid))
5835 break;
26d36301
TM		 5836 case -NFS4ERR_ADMIN_REVOKED:
5837 case -NFS4ERR_EXPIRED:
5838 nfs4_free_revoked_stateid(calldata->server,
5839 &calldata->arg.stateid,
5840 task->tk_msg.rpc_cred);
9e33bed5
TM		 5841 case -NFS4ERR_BAD_STATEID:
5842 case -NFS4ERR_OLD_STATEID:
faf5f49c 5843 case -NFS4ERR_STALE_STATEID:
425c1d4e
TM		 5844 if (!nfs4_stateid_match(&calldata->arg.stateid,
5845 &calldata->lsp->ls_stateid))
5846 rpc_restart_call_prepare(task);
faf5f49c
TM		 5847 break;
5848 default:
8478eaa1
N		 5849 if (nfs4_async_handle_error(task, calldata->server,
5850 NULL, NULL) == -EAGAIN)
d00c5d43 5851 rpc_restart_call_prepare(task);
faf5f49c 5852 }
2b1bc308 5853 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 5854}
5855
4ce70ada 5856static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 5857{
4ce70ada 5858 struct nfs4_unlockdata *calldata = data;
faf5f49c 5859
911d1aaf 5860 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 5861 goto out_wait;
425c1d4e 5862 nfs4_stateid_copy(&calldata->arg.stateid, &calldata->lsp->ls_stateid);
795a88c9 5863 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 5864 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 5865 goto out_no_action;
faf5f49c 5866 }
26e976a8 5867 calldata->timestamp = jiffies;
42e1cca7 5868 if (nfs4_setup_sequence(calldata->server->nfs_client,
a893693c 5869 &calldata->arg.seq_args,
2240a9e2
TM		 5870 &calldata->res.seq_res,
5871 task) != 0)
5872 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 5873 return;
5874out_no_action:
5875 task->tk_action = NULL;
5876out_wait:
5877 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 5878}
5879
963d8fe5 5880static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 5881 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 5882 .rpc_call_done = nfs4_locku_done,
06f814a3 5883 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 5884};
5885
a5d16a4d
TM		 5886static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5887 struct nfs_open_context *ctx,
5888 struct nfs4_lock_state *lsp,
5889 struct nfs_seqid *seqid)
5890{
5891 struct nfs4_unlockdata *data;
5138fde0
TM		 5892 struct rpc_message msg = {
5893 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5894 .rpc_cred = ctx->cred,
5895 };
c970aa85
TM		 5896 struct rpc_task_setup task_setup_data = {
5897 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 5898 .rpc_message = &msg,
c970aa85 5899 .callback_ops = &nfs4_locku_ops,
101070ca 5900 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5901 .flags = RPC_TASK_ASYNC,
5902 };
a5d16a4d 5903
fa940720
WAA		 5904 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5905 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5906
137d6aca
FF		 5907 /* Ensure this is an unlock - when canceling a lock, the
5908 * canceled lock is passed in, and it won't be an unlock.
5909 */
5910 fl->fl_type = F_UNLCK;
5911
a5d16a4d
TM		 5912 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5913 if (data == NULL) {
5914 nfs_free_seqid(seqid);
5915 return ERR_PTR(-ENOMEM);
5916 }
5917
a9c92d6b 5918 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5919 msg.rpc_argp = &data->arg;
5920 msg.rpc_resp = &data->res;
c970aa85
TM		 5921 task_setup_data.callback_data = data;
5922 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 5923}
5924
faf5f49c
TM		 5925static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5926{
65b62a29
TM		 5927 struct inode *inode = state->inode;
5928 struct nfs4_state_owner *sp = state->owner;
5929 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 5930 struct nfs_seqid *seqid;
1da177e4 5931 struct nfs4_lock_state *lsp;
06f814a3 5932 struct rpc_task *task;
b4019c0e 5933 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
06f814a3 5934 int status = 0;
536ff0f8 5935 unsigned char fl_flags = request->fl_flags;
faf5f49c 5936
8d0a8a9d 5937 status = nfs4_set_lock_state(state, request);
9b073574
TM		 5938 /* Unlock _before_ we do the RPC call */
5939 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 5940 /* Exclude nfs_delegation_claim_locks() */
5941 mutex_lock(&sp->so_delegreturn_mutex);
5942 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57 5943 down_read(&nfsi->rwsem);
75575ddf 5944 if (locks_lock_inode_wait(inode, request) == -ENOENT) {
19e03c57 5945 up_read(&nfsi->rwsem);
65b62a29 5946 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 5947 goto out;
19e03c57
TM		 5948 }
5949 up_read(&nfsi->rwsem);
65b62a29 5950 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 5951 if (status != 0)
9b073574
TM		 5952 goto out;
5953 /* Is this a delegated lock? */
8d0a8a9d 5954 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 5955 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5956 goto out;
b4019c0e
TM		 5957 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid;
5958 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 5959 status = -ENOMEM;
badc76dd 5960 if (IS_ERR(seqid))
9b073574 5961 goto out;
cd3758e3 5962 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 5963 status = PTR_ERR(task);
5964 if (IS_ERR(task))
9b073574 5965 goto out;
820bf85c 5966 status = rpc_wait_for_completion_task(task);
e6b3c4db 5967 rpc_put_task(task);
9b073574 5968out:
536ff0f8 5969 request->fl_flags = fl_flags;
d1b748a5 5970 trace_nfs4_unlock(request, state, F_SETLK, status);
1da177e4
LT		 5971 return status;
5972}
5973
a5d16a4d
TM		 5974struct nfs4_lockdata {
5975 struct nfs_lock_args arg;
5976 struct nfs_lock_res res;
5977 struct nfs4_lock_state *lsp;
5978 struct nfs_open_context *ctx;
5979 struct file_lock fl;
26e976a8 5980 unsigned long timestamp;
a5d16a4d
TM		 5981 int rpc_status;
5982 int cancelled;
66179efe 5983 struct nfs_server *server;
a5d16a4d
TM		 5984};
5985
5986static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 5987 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5988 gfp_t gfp_mask)
1da177e4 5989{
a5d16a4d
TM		 5990 struct nfs4_lockdata *p;
5991 struct inode *inode = lsp->ls_state->inode;
1da177e4 5992 struct nfs_server *server = NFS_SERVER(inode);
b4019c0e 5993 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
a5d16a4d 5994
8535b2be 5995 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 5996 if (p == NULL)
5997 return NULL;
5998
5999 p->arg.fh = NFS_FH(inode);
6000 p->arg.fl = &p->fl;
8535b2be 6001 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
badc76dd 6002 if (IS_ERR(p->arg.open_seqid))
2f74c0a0 6003 goto out_free;
b4019c0e
TM		 6004 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
6005 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask);
badc76dd 6006 if (IS_ERR(p->arg.lock_seqid))
2f74c0a0 6007 goto out_free_seqid;
7539bbab 6008 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 6009 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 6010 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 6011 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 6012 p->lsp = lsp;
66179efe 6013 p->server = server;
a5d16a4d
TM		 6014 atomic_inc(&lsp->ls_count);
6015 p->ctx = get_nfs_open_context(ctx);
6016 memcpy(&p->fl, fl, sizeof(p->fl));
6017 return p;
2f74c0a0
TM		 6018out_free_seqid:
6019 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 6020out_free:
6021 kfree(p);
6022 return NULL;
6023}
6024
6025static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
6026{
6027 struct nfs4_lockdata *data = calldata;
6028 struct nfs4_state *state = data->lsp->ls_state;
06735b34 6029
3110ff80 6030 dprintk("%s: begin!\n", __func__);
2f74c0a0 6031 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 6032 goto out_wait;
a5d16a4d 6033 /* Do we need to do an open_to_lock_owner? */
6b447539 6034 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) {
8fe72bac 6035 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 6036 goto out_release_lock_seqid;
8fe72bac 6037 }
425c1d4e
TM		 6038 nfs4_stateid_copy(&data->arg.open_stateid,
6039 &state->open_stateid);
a5d16a4d 6040 data->arg.new_lock_owner = 1;
c1d51931 6041 data->res.open_seqid = data->arg.open_seqid;
425c1d4e 6042 } else {
2f74c0a0 6043 data->arg.new_lock_owner = 0;
425c1d4e
TM		 6044 nfs4_stateid_copy(&data->arg.lock_stateid,
6045 &data->lsp->ls_stateid);
6046 }
5d422301
TM		 6047 if (!nfs4_valid_open_stateid(state)) {
6048 data->rpc_status = -EBADF;
6049 task->tk_action = NULL;
6050 goto out_release_open_seqid;
6051 }
26e976a8 6052 data->timestamp = jiffies;
42e1cca7 6053 if (nfs4_setup_sequence(data->server->nfs_client,
035168ab 6054 &data->arg.seq_args,
2240a9e2 6055 &data->res.seq_res,
d9afbd1b 6056 task) == 0)
66179efe 6057 return;
5d422301 6058out_release_open_seqid:
2240a9e2
TM		 6059 nfs_release_seqid(data->arg.open_seqid);
6060out_release_lock_seqid:
6061 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 6062out_wait:
6063 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 6064 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 6065}
6066
a5d16a4d
TM		 6067static void nfs4_lock_done(struct rpc_task *task, void *calldata)
6068{
6069 struct nfs4_lockdata *data = calldata;
39071e6f 6070 struct nfs4_lock_state *lsp = data->lsp;
a5d16a4d 6071
3110ff80 6072 dprintk("%s: begin!\n", __func__);
a5d16a4d 6073
14516c3a
TM		 6074 if (!nfs4_sequence_done(task, &data->res.seq_res))
6075 return;
66179efe 6076
a5d16a4d 6077 data->rpc_status = task->tk_status;
425c1d4e
TM		 6078 switch (task->tk_status) {
6079 case 0:
2b0143b5 6080 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)),
39071e6f 6081 data->timestamp);
c69899a1
TM		 6082 if (data->arg.new_lock) {
6083 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS);
75575ddf 6084 if (locks_lock_inode_wait(lsp->ls_state->inode, &data->fl) < 0) {
c69899a1
TM		 6085 rpc_restart_call_prepare(task);
6086 break;
6087 }
6088 }
39071e6f
TM		 6089 if (data->arg.new_lock_owner != 0) {
6090 nfs_confirm_seqid(&lsp->ls_seqid, 0);
6091 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid);
6092 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
6093 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid))
6094 rpc_restart_call_prepare(task);
425c1d4e
TM		 6095 break;
6096 case -NFS4ERR_BAD_STATEID:
6097 case -NFS4ERR_OLD_STATEID:
6098 case -NFS4ERR_STALE_STATEID:
6099 case -NFS4ERR_EXPIRED:
6100 if (data->arg.new_lock_owner != 0) {
6101 if (!nfs4_stateid_match(&data->arg.open_stateid,
6102 &lsp->ls_state->open_stateid))
6103 rpc_restart_call_prepare(task);
6104 } else if (!nfs4_stateid_match(&data->arg.lock_stateid,
6105 &lsp->ls_stateid))
6106 rpc_restart_call_prepare(task);
a5d16a4d 6107 }
3110ff80 6108 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 6109}
6110
6111static void nfs4_lock_release(void *calldata)
6112{
6113 struct nfs4_lockdata *data = calldata;
6114
3110ff80 6115 dprintk("%s: begin!\n", __func__);
2f74c0a0 6116 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 6117 if (data->cancelled != 0) {
6118 struct rpc_task *task;
6119 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
6120 data->arg.lock_seqid);
6121 if (!IS_ERR(task))
bf294b41 6122 rpc_put_task_async(task);
3110ff80 6123 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 6124 } else
6125 nfs_free_seqid(data->arg.lock_seqid);
6126 nfs4_put_lock_state(data->lsp);
6127 put_nfs_open_context(data->ctx);
6128 kfree(data);
3110ff80 6129 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 6130}
6131
6132static const struct rpc_call_ops nfs4_lock_ops = {
6133 .rpc_call_prepare = nfs4_lock_prepare,
6134 .rpc_call_done = nfs4_lock_done,
6135 .rpc_release = nfs4_lock_release,
6136};
6137
2bee72a6
TM		 6138static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
6139{
2bee72a6
TM		 6140 switch (error) {
6141 case -NFS4ERR_ADMIN_REVOKED:
d7f3e4bf 6142 case -NFS4ERR_EXPIRED:
2bee72a6 6143 case -NFS4ERR_BAD_STATEID:
ecac799a 6144 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 6145 if (new_lock_owner != 0 ||
795a88c9 6146 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 6147 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 6148 break;
6149 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 6150 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a 6151 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 6152 };
6153}
6154
afe6c27c 6155static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 6156{
6157 struct nfs4_lockdata *data;
6158 struct rpc_task *task;
5138fde0
TM		 6159 struct rpc_message msg = {
6160 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
6161 .rpc_cred = state->owner->so_cred,
6162 };
c970aa85
TM		 6163 struct rpc_task_setup task_setup_data = {
6164 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 6165 .rpc_message = &msg,
c970aa85 6166 .callback_ops = &nfs4_lock_ops,
101070ca 6167 .workqueue = nfsiod_workqueue,
c970aa85
TM		 6168 .flags = RPC_TASK_ASYNC,
6169 };
a5d16a4d
TM		 6170 int ret;
6171
3110ff80 6172 dprintk("%s: begin!\n", __func__);
cd3758e3 6173 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 6174 fl->fl_u.nfs4_fl.owner,
6175 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 6176 if (data == NULL)
6177 return -ENOMEM;
6178 if (IS_SETLKW(cmd))
6179 data->arg.block = 1;
a9c92d6b 6180 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 6181 msg.rpc_argp = &data->arg;
6182 msg.rpc_resp = &data->res;
c970aa85 6183 task_setup_data.callback_data = data;
8fe72bac
TM		 6184 if (recovery_type > NFS_LOCK_NEW) {
6185 if (recovery_type == NFS_LOCK_RECLAIM)
6186 data->arg.reclaim = NFS_LOCK_RECLAIM;
6187 nfs4_set_sequence_privileged(&data->arg.seq_args);
c69899a1
TM		 6188 } else
6189 data->arg.new_lock = 1;
c970aa85 6190 task = rpc_run_task(&task_setup_data);
7a1218a2 6191 if (IS_ERR(task))
a5d16a4d 6192 return PTR_ERR(task);
820bf85c 6193 ret = rpc_wait_for_completion_task(task);
a5d16a4d
TM		 6194 if (ret == 0) {
6195 ret = data->rpc_status;
2bee72a6
TM		 6196 if (ret)
6197 nfs4_handle_setlk_error(data->server, data->lsp,
6198 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 6199 } else
6200 data->cancelled = 1;
e6b3c4db 6201 rpc_put_task(task);
3110ff80 6202 dprintk("%s: done, ret = %d!\n", __func__, ret);
48c9579a 6203 trace_nfs4_set_lock(fl, state, &data->res.stateid, cmd, ret);
a5d16a4d 6204 return ret;
1da177e4
LT		 6205}
6206
6207static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
6208{
202b50dc 6209 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 6210 struct nfs4_exception exception = {
6211 .inode = state->inode,
6212 };
202b50dc
TM		 6213 int err;
6214
6215 do {
42a2d13e
TM		 6216 /* Cache the lock if possible... */
6217 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
6218 return 0;
afe6c27c 6219 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 6220 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 6221 break;
6222 nfs4_handle_exception(server, err, &exception);
6223 } while (exception.retry);
6224 return err;
1da177e4
LT		 6225}
6226
6227static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
6228{
202b50dc 6229 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 6230 struct nfs4_exception exception = {
6231 .inode = state->inode,
6232 };
202b50dc
TM		 6233 int err;
6234
6bfc93ef
TM		 6235 err = nfs4_set_lock_state(state, request);
6236 if (err != 0)
6237 return err;
f6de7a39 6238 if (!recover_lost_locks) {
ef1820f9
N		 6239 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
6240 return 0;
6241 }
202b50dc 6242 do {
42a2d13e
TM		 6243 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
6244 return 0;
afe6c27c 6245 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 6246 switch (err) {
6247 default:
6248 goto out;
6249 case -NFS4ERR_GRACE:
6250 case -NFS4ERR_DELAY:
6251 nfs4_handle_exception(server, err, &exception);
6252 err = 0;
6253 }
202b50dc 6254 } while (exception.retry);
a9ed2e25 6255out:
202b50dc 6256 return err;
1da177e4
LT		 6257}
6258
f062eb6c 6259#if defined(CONFIG_NFS_V4_1)
b01dd1d8
BS		 6260static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
6261{
c5896fc8
TM		 6262 struct nfs4_lock_state *lsp;
6263 int status;
b01dd1d8 6264
c5896fc8
TM		 6265 status = nfs4_set_lock_state(state, request);
6266 if (status != 0)
6267 return status;
6268 lsp = request->fl_u.nfs4_fl.owner;
6269 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) ||
6270 test_bit(NFS_LOCK_LOST, &lsp->ls_flags))
6271 return 0;
81b68de4 6272 return nfs4_lock_expired(state, request);
f062eb6c
BS		 6273}
6274#endif
6275
1da177e4
LT		 6276static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6277{
19e03c57 6278 struct nfs_inode *nfsi = NFS_I(state->inode);
11476e9d 6279 struct nfs4_state_owner *sp = state->owner;
01c3b861 6280 unsigned char fl_flags = request->fl_flags;
1ea67dbd 6281 int status;
1da177e4 6282
01c3b861 6283 request->fl_flags |= FL_ACCESS;
75575ddf 6284 status = locks_lock_inode_wait(state->inode, request);
01c3b861
TM		 6285 if (status < 0)
6286 goto out;
11476e9d 6287 mutex_lock(&sp->so_delegreturn_mutex);
19e03c57 6288 down_read(&nfsi->rwsem);
01c3b861 6289 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 6290 /* Yes: cache locks! */
01c3b861 6291 /* ...but avoid races with delegation recall... */
19e03c57 6292 request->fl_flags = fl_flags & ~FL_SLEEP;
75575ddf 6293 status = locks_lock_inode_wait(state->inode, request);
c69899a1 6294 up_read(&nfsi->rwsem);
11476e9d 6295 mutex_unlock(&sp->so_delegreturn_mutex);
9a99af49 6296 goto out;
9a99af49 6297 }
19e03c57 6298 up_read(&nfsi->rwsem);
11476e9d 6299 mutex_unlock(&sp->so_delegreturn_mutex);
c69899a1 6300 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
01c3b861
TM		 6301out:
6302 request->fl_flags = fl_flags;
1da177e4
LT		 6303 return status;
6304}
6305
6306static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6307{
a1d0b5ee
TM		 6308 struct nfs4_exception exception = {
6309 .state = state,
05ffe24f 6310 .inode = state->inode,
a1d0b5ee 6311 };
1da177e4
LT		 6312 int err;
6313
6314 do {
965b5d67
TM		 6315 err = _nfs4_proc_setlk(state, cmd, request);
6316 if (err == -NFS4ERR_DENIED)
6317 err = -EAGAIN;
1da177e4 6318 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 6319 err, &exception);
1da177e4
LT		 6320 } while (exception.retry);
6321 return err;
6322}
6323
d2f3a7f9
JL		 6324#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
6325#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
6326
6327static int
a1d617d8
JL		 6328nfs4_retry_setlk_simple(struct nfs4_state *state, int cmd,
6329 struct file_lock *request)
d2f3a7f9
JL		 6330{
6331 int status = -ERESTARTSYS;
6332 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
6333
6334 while(!signalled()) {
6335 status = nfs4_proc_setlk(state, cmd, request);
6336 if ((status != -EAGAIN) || IS_SETLK(cmd))
6337 break;
6338 freezable_schedule_timeout_interruptible(timeout);
6339 timeout *= 2;
6340 timeout = min_t(unsigned long, NFS4_LOCK_MAXTIMEOUT, timeout);
6341 status = -ERESTARTSYS;
6342 }
6343 return status;
6344}
6345
a1d617d8
JL		 6346#ifdef CONFIG_NFS_V4_1
6347struct nfs4_lock_waiter {
6348 struct task_struct *task;
6349 struct inode *inode;
6350 struct nfs_lowner *owner;
6351 bool notified;
6352};
6353
6354static int
6355nfs4_wake_lock_waiter(wait_queue_t *wait, unsigned int mode, int flags, void *key)
6356{
6357 int ret;
6358 struct cb_notify_lock_args *cbnl = key;
6359 struct nfs4_lock_waiter *waiter = wait->private;
6360 struct nfs_lowner *lowner = &cbnl->cbnl_owner,
6361 *wowner = waiter->owner;
6362
6363 /* Only wake if the callback was for the same owner */
6364 if (lowner->clientid != wowner->clientid ||
6365 lowner->id != wowner->id ||
6366 lowner->s_dev != wowner->s_dev)
6367 return 0;
6368
6369 /* Make sure it's for the right inode */
6370 if (nfs_compare_fh(NFS_FH(waiter->inode), &cbnl->cbnl_fh))
6371 return 0;
6372
6373 waiter->notified = true;
6374
6375 /* override "private" so we can use default_wake_function */
6376 wait->private = waiter->task;
6377 ret = autoremove_wake_function(wait, mode, flags, key);
6378 wait->private = waiter;
6379 return ret;
6380}
6381
6382static int
6383nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6384{
6385 int status = -ERESTARTSYS;
6386 unsigned long flags;
6387 struct nfs4_lock_state *lsp = request->fl_u.nfs4_fl.owner;
6388 struct nfs_server *server = NFS_SERVER(state->inode);
6389 struct nfs_client *clp = server->nfs_client;
6390 wait_queue_head_t *q = &clp->cl_lock_waitq;
6391 struct nfs_lowner owner = { .clientid = clp->cl_clientid,
6392 .id = lsp->ls_seqid.owner_id,
6393 .s_dev = server->s_dev };
6394 struct nfs4_lock_waiter waiter = { .task = current,
6395 .inode = state->inode,
6396 .owner = &owner,
6397 .notified = false };
6398 wait_queue_t wait;
6399
6400 /* Don't bother with waitqueue if we don't expect a callback */
6401 if (!test_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags))
6402 return nfs4_retry_setlk_simple(state, cmd, request);
6403
6404 init_wait(&wait);
6405 wait.private = &waiter;
6406 wait.func = nfs4_wake_lock_waiter;
6407 add_wait_queue(q, &wait);
6408
6409 while(!signalled()) {
6410 status = nfs4_proc_setlk(state, cmd, request);
6411 if ((status != -EAGAIN) || IS_SETLK(cmd))
6412 break;
6413
6414 status = -ERESTARTSYS;
6415 spin_lock_irqsave(&q->lock, flags);
6416 if (waiter.notified) {
6417 spin_unlock_irqrestore(&q->lock, flags);
6418 continue;
6419 }
6420 set_current_state(TASK_INTERRUPTIBLE);
6421 spin_unlock_irqrestore(&q->lock, flags);
6422
6423 freezable_schedule_timeout_interruptible(NFS4_LOCK_MAXTIMEOUT);
6424 }
6425
6426 finish_wait(q, &wait);
6427 return status;
6428}
6429#else /* !CONFIG_NFS_V4_1 */
6430static inline int
6431nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6432{
6433 return nfs4_retry_setlk_simple(state, cmd, request);
6434}
6435#endif
6436
1da177e4
LT		 6437static int
6438nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
6439{
6440 struct nfs_open_context *ctx;
6441 struct nfs4_state *state;
1da177e4
LT		 6442 int status;
6443
6444 /* verify open state */
cd3758e3 6445 ctx = nfs_file_open_context(filp);
1da177e4
LT		 6446 state = ctx->state;
6447
6448 if (request->fl_start < 0 || request->fl_end < 0)
6449 return -EINVAL;
6450
d953126a
TM		 6451 if (IS_GETLK(cmd)) {
6452 if (state != NULL)
6453 return nfs4_proc_getlk(state, F_GETLK, request);
6454 return 0;
6455 }
1da177e4
LT		 6456
6457 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
6458 return -EINVAL;
6459
d953126a
TM		 6460 if (request->fl_type == F_UNLCK) {
6461 if (state != NULL)
6462 return nfs4_proc_unlck(state, cmd, request);
6463 return 0;
6464 }
1da177e4 6465
d953126a
TM		 6466 if (state == NULL)
6467 return -ENOLCK;
1ea67dbd
JL		 6468
6469 if ((request->fl_flags & FL_POSIX) &&
6470 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
6471 return -ENOLCK;
6472
55725513
TM		 6473 /*
6474 * Don't rely on the VFS having checked the file open mode,
6475 * since it won't do this for flock() locks.
6476 */
f44106e2 6477 switch (request->fl_type) {
55725513
TM		 6478 case F_RDLCK:
6479 if (!(filp->f_mode & FMODE_READ))
6480 return -EBADF;
6481 break;
6482 case F_WRLCK:
6483 if (!(filp->f_mode & FMODE_WRITE))
6484 return -EBADF;
6485 }
6486
1ea67dbd
JL		 6487 status = nfs4_set_lock_state(state, request);
6488 if (status != 0)
6489 return status;
6490
d2f3a7f9 6491 return nfs4_retry_setlk(state, cmd, request);
1da177e4
LT		 6492}
6493
db4f2e63 6494int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 6495{
6496 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 6497 int err;
6498
6499 err = nfs4_set_lock_state(state, fl);
6500 if (err != 0)
db4f2e63 6501 return err;
4a706fa0 6502 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 6503 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 6504}
6b3b5496 6505
cf470c3e
TM		 6506struct nfs_release_lockowner_data {
6507 struct nfs4_lock_state *lsp;
5ae67c4f 6508 struct nfs_server *server;
cf470c3e 6509 struct nfs_release_lockowner_args args;
b7e63a10 6510 struct nfs_release_lockowner_res res;
60ea6812 6511 unsigned long timestamp;
cf470c3e
TM		 6512};
6513
fbd4bfd1
CL		 6514static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
6515{
6516 struct nfs_release_lockowner_data *data = calldata;
5b53dc88 6517 struct nfs_server *server = data->server;
7981c8a6
AS		 6518 nfs4_setup_sequence(server->nfs_client, &data->args.seq_args,
6519 &data->res.seq_res, task);
5b53dc88 6520 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
60ea6812 6521 data->timestamp = jiffies;
fbd4bfd1
CL		 6522}
6523
6524static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
6525{
6526 struct nfs_release_lockowner_data *data = calldata;
60ea6812
CL		 6527 struct nfs_server *server = data->server;
6528
b7e63a10 6529 nfs40_sequence_done(task, &data->res.seq_res);
60ea6812
CL		 6530
6531 switch (task->tk_status) {
6532 case 0:
6533 renew_lease(server, data->timestamp);
6534 break;
6535 case -NFS4ERR_STALE_CLIENTID:
6536 case -NFS4ERR_EXPIRED:
5b53dc88
KM		 6537 nfs4_schedule_lease_recovery(server->nfs_client);
6538 break;
60ea6812
CL		 6539 case -NFS4ERR_LEASE_MOVED:
6540 case -NFS4ERR_DELAY:
8478eaa1
N		 6541 if (nfs4_async_handle_error(task, server,
6542 NULL, NULL) == -EAGAIN)
60ea6812
CL		 6543 rpc_restart_call_prepare(task);
6544 }
fbd4bfd1
CL		 6545}
6546
d3c7b7cc
TM		 6547static void nfs4_release_lockowner_release(void *calldata)
6548{
cf470c3e 6549 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 6550 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 6551 kfree(calldata);
6552}
6553
17280175 6554static const struct rpc_call_ops nfs4_release_lockowner_ops = {
fbd4bfd1
CL		 6555 .rpc_call_prepare = nfs4_release_lockowner_prepare,
6556 .rpc_call_done = nfs4_release_lockowner_done,
d3c7b7cc
TM		 6557 .rpc_release = nfs4_release_lockowner_release,
6558};
6559
f1cdae87
JL		 6560static void
6561nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 6562{
cf470c3e 6563 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 6564 struct rpc_message msg = {
6565 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
6566 };
6567
6568 if (server->nfs_client->cl_mvops->minor_version != 0)
f1cdae87 6569 return;
fbd4bfd1 6570
cf470c3e
TM		 6571 data = kmalloc(sizeof(*data), GFP_NOFS);
6572 if (!data)
f1cdae87 6573 return;
cf470c3e 6574 data->lsp = lsp;
5ae67c4f 6575 data->server = server;
cf470c3e
TM		 6576 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6577 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
6578 data->args.lock_owner.s_dev = server->s_dev;
fbd4bfd1 6579
cf470c3e 6580 msg.rpc_argp = &data->args;
b7e63a10
TM		 6581 msg.rpc_resp = &data->res;
6582 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
cf470c3e 6583 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
d3c7b7cc
TM		 6584}
6585
aa1870af
BF		 6586#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
6587
d9a82a04 6588static int nfs4_xattr_set_nfs4_acl(const struct xattr_handler *handler,
59301226
AV		 6589 struct dentry *unused, struct inode *inode,
6590 const char *key, const void *buf,
6591 size_t buflen, int flags)
6b3b5496 6592{
59301226 6593 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 6594}
6595
d9a82a04 6596static int nfs4_xattr_get_nfs4_acl(const struct xattr_handler *handler,
b296821a
AV		 6597 struct dentry *unused, struct inode *inode,
6598 const char *key, void *buf, size_t buflen)
6b3b5496 6599{
b296821a 6600 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 6601}
6602
764a5c6b 6603static bool nfs4_xattr_list_nfs4_acl(struct dentry *dentry)
6b3b5496 6604{
764a5c6b 6605 return nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry)));
6b3b5496
BF		 6606}
6607
c9bccef6 6608#ifdef CONFIG_NFS_V4_SECURITY_LABEL
c9bccef6 6609
d9a82a04 6610static int nfs4_xattr_set_nfs4_label(const struct xattr_handler *handler,
59301226
AV		 6611 struct dentry *unused, struct inode *inode,
6612 const char *key, const void *buf,
6613 size_t buflen, int flags)
c9bccef6
DQ		 6614{
6615 if (security_ismaclabel(key))
59301226 6616 return nfs4_set_security_label(inode, buf, buflen);
c9bccef6
DQ		 6617
6618 return -EOPNOTSUPP;
6619}
6620
d9a82a04 6621static int nfs4_xattr_get_nfs4_label(const struct xattr_handler *handler,
b296821a
AV		 6622 struct dentry *unused, struct inode *inode,
6623 const char *key, void *buf, size_t buflen)
c9bccef6
DQ		 6624{
6625 if (security_ismaclabel(key))
b296821a 6626 return nfs4_get_security_label(inode, buf, buflen);
c9bccef6
DQ		 6627 return -EOPNOTSUPP;
6628}
6629
c4803c49
AG		 6630static ssize_t
6631nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
c9bccef6 6632{
c4803c49 6633 int len = 0;
c9bccef6 6634
c4803c49
AG		 6635 if (nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) {
6636 len = security_inode_listsecurity(inode, list, list_len);
6637 if (list_len && len > list_len)
6638 return -ERANGE;
c9bccef6
DQ		 6639 }
6640 return len;
6641}
6642
6643static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
6644 .prefix = XATTR_SECURITY_PREFIX,
c9bccef6
DQ		 6645 .get = nfs4_xattr_get_nfs4_label,
6646 .set = nfs4_xattr_set_nfs4_label,
6647};
c9bccef6 6648
c4803c49
AG		 6649#else
6650
6651static ssize_t
6652nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
6653{
6654 return 0;
6655}
6656
6657#endif
c9bccef6 6658
533eb461
AA		 6659/*
6660 * nfs_fhget will use either the mounted_on_fileid or the fileid
6661 */
69aaaae1
TM		 6662static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6663{
533eb461
AA		 6664 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6665 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6666 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 6667 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 6668 return;
6669
6670 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 6671 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 6672 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6673 fattr->nlink = 2;
6674}
6675
f05d147f
BS		 6676static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6677 const struct qstr *name,
6678 struct nfs4_fs_locations *fs_locations,
6679 struct page *page)
683b57b4
TM		 6680{
6681 struct nfs_server *server = NFS_SERVER(dir);
a09df2ca 6682 u32 bitmask[3] = {
361e624f 6683 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 6684 };
6685 struct nfs4_fs_locations_arg args = {
6686 .dir_fh = NFS_FH(dir),
c228fd3a 6687 .name = name,
683b57b4
TM		 6688 .page = page,
6689 .bitmask = bitmask,
6690 };
22958463
BH		 6691 struct nfs4_fs_locations_res res = {
6692 .fs_locations = fs_locations,
6693 };
683b57b4
TM		 6694 struct rpc_message msg = {
6695 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6696 .rpc_argp = &args,
22958463 6697 .rpc_resp = &res,
683b57b4
TM		 6698 };
6699 int status;
6700
3110ff80 6701 dprintk("%s: start\n", __func__);
533eb461
AA		 6702
6703 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6704 * is not supported */
6705 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6706 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6707 else
6708 bitmask[0] |= FATTR4_WORD0_FILEID;
6709
c228fd3a 6710 nfs_fattr_init(&fs_locations->fattr);
683b57b4 6711 fs_locations->server = server;
830b8e33 6712 fs_locations->nlocations = 0;
f05d147f 6713 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 6714 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 6715 return status;
6716}
6717
f05d147f
BS		 6718int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6719 const struct qstr *name,
6720 struct nfs4_fs_locations *fs_locations,
6721 struct page *page)
db0a9593
BS		 6722{
6723 struct nfs4_exception exception = { };
6724 int err;
6725 do {
078ea3df
TM		 6726 err = _nfs4_proc_fs_locations(client, dir, name,
6727 fs_locations, page);
6728 trace_nfs4_get_fs_locations(dir, name, err);
6729 err = nfs4_handle_exception(NFS_SERVER(dir), err,
db0a9593
BS		 6730 &exception);
6731 } while (exception.retry);
6732 return err;
6733}
6734
b03d735b
CL		 6735/*
6736 * This operation also signals the server that this client is
6737 * performing migration recovery. The server can stop returning
6738 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6739 * appended to this compound to identify the client ID which is
6740 * performing recovery.
6741 */
6742static int _nfs40_proc_get_locations(struct inode *inode,
6743 struct nfs4_fs_locations *locations,
6744 struct page *page, struct rpc_cred *cred)
6745{
6746 struct nfs_server *server = NFS_SERVER(inode);
6747 struct rpc_clnt *clnt = server->client;
6748 u32 bitmask[2] = {
6749 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6750 };
6751 struct nfs4_fs_locations_arg args = {
6752 .clientid = server->nfs_client->cl_clientid,
6753 .fh = NFS_FH(inode),
6754 .page = page,
6755 .bitmask = bitmask,
6756 .migration = 1, /* skip LOOKUP */
6757 .renew = 1, /* append RENEW */
6758 };
6759 struct nfs4_fs_locations_res res = {
6760 .fs_locations = locations,
6761 .migration = 1,
6762 .renew = 1,
6763 };
6764 struct rpc_message msg = {
6765 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6766 .rpc_argp = &args,
6767 .rpc_resp = &res,
6768 .rpc_cred = cred,
6769 };
6770 unsigned long now = jiffies;
6771 int status;
6772
6773 nfs_fattr_init(&locations->fattr);
6774 locations->server = server;
6775 locations->nlocations = 0;
6776
6777 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6778 nfs4_set_sequence_privileged(&args.seq_args);
6779 status = nfs4_call_sync_sequence(clnt, server, &msg,
6780 &args.seq_args, &res.seq_res);
6781 if (status)
6782 return status;
6783
6784 renew_lease(server, now);
6785 return 0;
6786}
6787
6788#ifdef CONFIG_NFS_V4_1
6789
6790/*
6791 * This operation also signals the server that this client is
6792 * performing migration recovery. The server can stop asserting
6793 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6794 * performing this operation is identified in the SEQUENCE
6795 * operation in this compound.
6796 *
6797 * When the client supports GETATTR(fs_locations_info), it can
6798 * be plumbed in here.
6799 */
6800static int _nfs41_proc_get_locations(struct inode *inode,
6801 struct nfs4_fs_locations *locations,
6802 struct page *page, struct rpc_cred *cred)
6803{
6804 struct nfs_server *server = NFS_SERVER(inode);
6805 struct rpc_clnt *clnt = server->client;
6806 u32 bitmask[2] = {
6807 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6808 };
6809 struct nfs4_fs_locations_arg args = {
6810 .fh = NFS_FH(inode),
6811 .page = page,
6812 .bitmask = bitmask,
6813 .migration = 1, /* skip LOOKUP */
6814 };
6815 struct nfs4_fs_locations_res res = {
6816 .fs_locations = locations,
6817 .migration = 1,
6818 };
6819 struct rpc_message msg = {
6820 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6821 .rpc_argp = &args,
6822 .rpc_resp = &res,
6823 .rpc_cred = cred,
6824 };
6825 int status;
6826
6827 nfs_fattr_init(&locations->fattr);
6828 locations->server = server;
6829 locations->nlocations = 0;
6830
6831 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6832 nfs4_set_sequence_privileged(&args.seq_args);
6833 status = nfs4_call_sync_sequence(clnt, server, &msg,
6834 &args.seq_args, &res.seq_res);
6835 if (status == NFS4_OK &&
6836 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6837 status = -NFS4ERR_LEASE_MOVED;
6838 return status;
6839}
6840
6841#endif /* CONFIG_NFS_V4_1 */
6842
6843/**
6844 * nfs4_proc_get_locations - discover locations for a migrated FSID
6845 * @inode: inode on FSID that is migrating
6846 * @locations: result of query
6847 * @page: buffer
6848 * @cred: credential to use for this operation
6849 *
6850 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6851 * operation failed, or a negative errno if a local error occurred.
6852 *
6853 * On success, "locations" is filled in, but if the server has
6854 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6855 * asserted.
6856 *
6857 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6858 * from this client that require migration recovery.
6859 */
6860int nfs4_proc_get_locations(struct inode *inode,
6861 struct nfs4_fs_locations *locations,
6862 struct page *page, struct rpc_cred *cred)
6863{
6864 struct nfs_server *server = NFS_SERVER(inode);
6865 struct nfs_client *clp = server->nfs_client;
6866 const struct nfs4_mig_recovery_ops *ops =
6867 clp->cl_mvops->mig_recovery_ops;
6868 struct nfs4_exception exception = { };
6869 int status;
6870
6871 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6872 (unsigned long long)server->fsid.major,
6873 (unsigned long long)server->fsid.minor,
6874 clp->cl_hostname);
6875 nfs_display_fhandle(NFS_FH(inode), __func__);
6876
6877 do {
6878 status = ops->get_locations(inode, locations, page, cred);
6879 if (status != -NFS4ERR_DELAY)
6880 break;
6881 nfs4_handle_exception(server, status, &exception);
6882 } while (exception.retry);
6883 return status;
6884}
6885
44c99933
CL		 6886/*
6887 * This operation also signals the server that this client is
6888 * performing "lease moved" recovery. The server can stop
6889 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6890 * is appended to this compound to identify the client ID which is
6891 * performing recovery.
6892 */
6893static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6894{
6895 struct nfs_server *server = NFS_SERVER(inode);
6896 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6897 struct rpc_clnt *clnt = server->client;
6898 struct nfs4_fsid_present_arg args = {
6899 .fh = NFS_FH(inode),
6900 .clientid = clp->cl_clientid,
6901 .renew = 1, /* append RENEW */
6902 };
6903 struct nfs4_fsid_present_res res = {
6904 .renew = 1,
6905 };
6906 struct rpc_message msg = {
6907 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6908 .rpc_argp = &args,
6909 .rpc_resp = &res,
6910 .rpc_cred = cred,
6911 };
6912 unsigned long now = jiffies;
6913 int status;
6914
6915 res.fh = nfs_alloc_fhandle();
6916 if (res.fh == NULL)
6917 return -ENOMEM;
6918
6919 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6920 nfs4_set_sequence_privileged(&args.seq_args);
6921 status = nfs4_call_sync_sequence(clnt, server, &msg,
6922 &args.seq_args, &res.seq_res);
6923 nfs_free_fhandle(res.fh);
6924 if (status)
6925 return status;
6926
6927 do_renew_lease(clp, now);
6928 return 0;
6929}
6930
6931#ifdef CONFIG_NFS_V4_1
6932
6933/*
6934 * This operation also signals the server that this client is
6935 * performing "lease moved" recovery. The server can stop asserting
6936 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
6937 * this operation is identified in the SEQUENCE operation in this
6938 * compound.
6939 */
6940static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6941{
6942 struct nfs_server *server = NFS_SERVER(inode);
6943 struct rpc_clnt *clnt = server->client;
6944 struct nfs4_fsid_present_arg args = {
6945 .fh = NFS_FH(inode),
6946 };
6947 struct nfs4_fsid_present_res res = {
6948 };
6949 struct rpc_message msg = {
6950 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6951 .rpc_argp = &args,
6952 .rpc_resp = &res,
6953 .rpc_cred = cred,
6954 };
6955 int status;
6956
6957 res.fh = nfs_alloc_fhandle();
6958 if (res.fh == NULL)
6959 return -ENOMEM;
6960
6961 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6962 nfs4_set_sequence_privileged(&args.seq_args);
6963 status = nfs4_call_sync_sequence(clnt, server, &msg,
6964 &args.seq_args, &res.seq_res);
6965 nfs_free_fhandle(res.fh);
6966 if (status == NFS4_OK &&
6967 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6968 status = -NFS4ERR_LEASE_MOVED;
6969 return status;
6970}
6971
6972#endif /* CONFIG_NFS_V4_1 */
6973
6974/**
6975 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
6976 * @inode: inode on FSID to check
6977 * @cred: credential to use for this operation
6978 *
6979 * Server indicates whether the FSID is present, moved, or not
6980 * recognized. This operation is necessary to clear a LEASE_MOVED
6981 * condition for this client ID.
6982 *
6983 * Returns NFS4_OK if the FSID is present on this server,
6984 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
6985 * NFS4ERR code if some error occurred on the server, or a
6986 * negative errno if a local failure occurred.
6987 */
6988int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6989{
6990 struct nfs_server *server = NFS_SERVER(inode);
6991 struct nfs_client *clp = server->nfs_client;
6992 const struct nfs4_mig_recovery_ops *ops =
6993 clp->cl_mvops->mig_recovery_ops;
6994 struct nfs4_exception exception = { };
6995 int status;
6996
6997 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6998 (unsigned long long)server->fsid.major,
6999 (unsigned long long)server->fsid.minor,
7000 clp->cl_hostname);
7001 nfs_display_fhandle(NFS_FH(inode), __func__);
7002
7003 do {
7004 status = ops->fsid_present(inode, cred);
7005 if (status != -NFS4ERR_DELAY)
7006 break;
7007 nfs4_handle_exception(server, status, &exception);
7008 } while (exception.retry);
7009 return status;
7010}
7011
5ec16a85 7012/**
a5250def
WAA		 7013 * If 'use_integrity' is true and the state managment nfs_client
7014 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
7015 * and the machine credential as per RFC3530bis and RFC5661 Security
7016 * Considerations sections. Otherwise, just use the user cred with the
7017 * filesystem's rpc_client.
5ec16a85 7018 */
a5250def 7019static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
5a5ea0d4
BS		 7020{
7021 int status;
7022 struct nfs4_secinfo_arg args = {
7023 .dir_fh = NFS_FH(dir),
7024 .name = name,
7025 };
7026 struct nfs4_secinfo_res res = {
7027 .flavors = flavors,
7028 };
7029 struct rpc_message msg = {
7030 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
7031 .rpc_argp = &args,
7032 .rpc_resp = &res,
7033 };
a5250def 7034 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
7cb852df 7035 struct rpc_cred *cred = NULL;
a5250def
WAA		 7036
7037 if (use_integrity) {
7038 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
7cb852df
WAA		 7039 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
7040 msg.rpc_cred = cred;
a5250def 7041 }
5a5ea0d4
BS		 7042
7043 dprintk("NFS call secinfo %s\n", name->name);
8b5bee2e
WAA		 7044
7045 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
7046 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
7047
a5250def
WAA		 7048 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
7049 &res.seq_res, 0);
5a5ea0d4 7050 dprintk("NFS reply secinfo: %d\n", status);
a5250def 7051
7cb852df
WAA		 7052 if (cred)
7053 put_rpccred(cred);
a5250def 7054
5a5ea0d4
BS		 7055 return status;
7056}
7057
72de53ec
BS		 7058int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
7059 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 7060{
7061 struct nfs4_exception exception = { };
7062 int err;
7063 do {
a5250def
WAA		 7064 err = -NFS4ERR_WRONGSEC;
7065
7066 /* try to use integrity protection with machine cred */
7067 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
7068 err = _nfs4_proc_secinfo(dir, name, flavors, true);
7069
7070 /*
7071 * if unable to use integrity protection, or SECINFO with
7072 * integrity protection returns NFS4ERR_WRONGSEC (which is
7073 * disallowed by spec, but exists in deployed servers) use
7074 * the current filesystem's rpc_client and the user cred.
7075 */
7076 if (err == -NFS4ERR_WRONGSEC)
7077 err = _nfs4_proc_secinfo(dir, name, flavors, false);
7078
078ea3df
TM		 7079 trace_nfs4_secinfo(dir, name, err);
7080 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5a5ea0d4
BS		 7081 &exception);
7082 } while (exception.retry);
7083 return err;
7084}
7085
557134a3 7086#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 7087/*
7088 * Check the exchange flags returned by the server for invalid flags, having
7089 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
7090 * DS flags set.
7091 */
7092static int nfs4_check_cl_exchange_flags(u32 flags)
7093{
7094 if (flags & ~EXCHGID4_FLAG_MASK_R)
7095 goto out_inval;
7096 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
7097 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
7098 goto out_inval;
7099 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
7100 goto out_inval;
7101 return NFS_OK;
7102out_inval:
7103 return -NFS4ERR_INVAL;
7104}
7105
78fe0f41 7106static bool
79d4e1f0
CL		 7107nfs41_same_server_scope(struct nfs41_server_scope *a,
7108 struct nfs41_server_scope *b)
78fe0f41 7109{
49ad0145
AS		 7110 if (a->server_scope_sz != b->server_scope_sz)
7111 return false;
7112 return memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0;
78fe0f41
WAA		 7113}
7114
02a95dee
AA		 7115static void
7116nfs4_bind_one_conn_to_session_done(struct rpc_task *task, void *calldata)
7117{
7118}
7119
7120static const struct rpc_call_ops nfs4_bind_one_conn_to_session_ops = {
7121 .rpc_call_done = &nfs4_bind_one_conn_to_session_done,
7122};
7123
7c44f1ae 7124/*
d9ddbf5d 7125 * nfs4_proc_bind_one_conn_to_session()
7c44f1ae
WAA		 7126 *
7127 * The 4.1 client currently uses the same TCP connection for the
7128 * fore and backchannel.
7129 */
d9ddbf5d
TM		 7130static
7131int nfs4_proc_bind_one_conn_to_session(struct rpc_clnt *clnt,
7132 struct rpc_xprt *xprt,
7133 struct nfs_client *clp,
7134 struct rpc_cred *cred)
7c44f1ae
WAA		 7135{
7136 int status;
71a097c6
TM		 7137 struct nfs41_bind_conn_to_session_args args = {
7138 .client = clp,
7139 .dir = NFS4_CDFC4_FORE_OR_BOTH,
7140 };
7c44f1ae
WAA		 7141 struct nfs41_bind_conn_to_session_res res;
7142 struct rpc_message msg = {
7143 .rpc_proc =
7144 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
71a097c6 7145 .rpc_argp = &args,
7c44f1ae 7146 .rpc_resp = &res,
2cf047c9 7147 .rpc_cred = cred,
7c44f1ae 7148 };
d9ddbf5d
TM		 7149 struct rpc_task_setup task_setup_data = {
7150 .rpc_client = clnt,
7151 .rpc_xprt = xprt,
02a95dee 7152 .callback_ops = &nfs4_bind_one_conn_to_session_ops,
d9ddbf5d
TM		 7153 .rpc_message = &msg,
7154 .flags = RPC_TASK_TIMEOUT,
7155 };
7156 struct rpc_task *task;
7c44f1ae
WAA		 7157
7158 dprintk("--> %s\n", __func__);
7c44f1ae 7159
71a097c6
TM		 7160 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id);
7161 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN))
7162 args.dir = NFS4_CDFC4_FORE;
7c44f1ae 7163
d9ddbf5d
TM		 7164 /* Do not set the backchannel flag unless this is clnt->cl_xprt */
7165 if (xprt != rcu_access_pointer(clnt->cl_xprt))
7166 args.dir = NFS4_CDFC4_FORE;
7167
7168 task = rpc_run_task(&task_setup_data);
7169 if (!IS_ERR(task)) {
7170 status = task->tk_status;
7171 rpc_put_task(task);
7172 } else
7173 status = PTR_ERR(task);
c6d01c6f 7174 trace_nfs4_bind_conn_to_session(clp, status);
7c44f1ae 7175 if (status == 0) {
71a097c6 7176 if (memcmp(res.sessionid.data,
7c44f1ae
WAA		 7177 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
7178 dprintk("NFS: %s: Session ID mismatch\n", __func__);
7179 status = -EIO;
71a097c6 7180 goto out;
7c44f1ae 7181 }
71a097c6 7182 if ((res.dir & args.dir) != res.dir || res.dir == 0) {
7c44f1ae
WAA		 7183 dprintk("NFS: %s: Unexpected direction from server\n",
7184 __func__);
7185 status = -EIO;
71a097c6 7186 goto out;
7c44f1ae 7187 }
71a097c6 7188 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) {
7c44f1ae
WAA		 7189 dprintk("NFS: %s: Server returned RDMA mode = true\n",
7190 __func__);
7191 status = -EIO;
71a097c6 7192 goto out;
7c44f1ae
WAA		 7193 }
7194 }
7c44f1ae
WAA		 7195out:
7196 dprintk("<-- %s status= %d\n", __func__, status);
7197 return status;
7198}
7199
d9ddbf5d
TM		 7200struct rpc_bind_conn_calldata {
7201 struct nfs_client *clp;
7202 struct rpc_cred *cred;
7203};
7204
7205static int
7206nfs4_proc_bind_conn_to_session_callback(struct rpc_clnt *clnt,
7207 struct rpc_xprt *xprt,
7208 void *calldata)
7209{
7210 struct rpc_bind_conn_calldata *p = calldata;
7211
7212 return nfs4_proc_bind_one_conn_to_session(clnt, xprt, p->clp, p->cred);
7213}
7214
7215int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7216{
7217 struct rpc_bind_conn_calldata data = {
7218 .clp = clp,
7219 .cred = cred,
7220 };
7221 return rpc_clnt_iterate_for_each_xprt(clp->cl_rpcclient,
7222 nfs4_proc_bind_conn_to_session_callback, &data);
7223}
7224
99fe60d0 7225/*
fa940720
WAA		 7226 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
7227 * and operations we'd like to see to enable certain features in the allow map
2031cd1a
WAA		 7228 */
7229static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
7230 .how = SP4_MACH_CRED,
7231 .enforce.u.words = {
7232 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
7233 1 << (OP_EXCHANGE_ID - 32) |
7234 1 << (OP_CREATE_SESSION - 32) |
7235 1 << (OP_DESTROY_SESSION - 32) |
7236 1 << (OP_DESTROY_CLIENTID - 32)
fa940720
WAA		 7237 },
7238 .allow.u.words = {
7239 [0] = 1 << (OP_CLOSE) |
99ade3c7 7240 1 << (OP_OPEN_DOWNGRADE) |
a0279625 7241 1 << (OP_LOCKU) |
99ade3c7 7242 1 << (OP_DELEGRETURN) |
a0279625 7243 1 << (OP_COMMIT),
8b5bee2e 7244 [1] = 1 << (OP_SECINFO - 32) |
3787d506 7245 1 << (OP_SECINFO_NO_NAME - 32) |
99ade3c7 7246 1 << (OP_LAYOUTRETURN - 32) |
3787d506 7247 1 << (OP_TEST_STATEID - 32) |
a0279625
WAA		 7248 1 << (OP_FREE_STATEID - 32) |
7249 1 << (OP_WRITE - 32)
2031cd1a
WAA		 7250 }
7251};
7252
7253/*
7254 * Select the state protection mode for client `clp' given the server results
7255 * from exchange_id in `sp'.
99fe60d0 7256 *
2031cd1a
WAA		 7257 * Returns 0 on success, negative errno otherwise.
7258 */
7259static int nfs4_sp4_select_mode(struct nfs_client *clp,
7260 struct nfs41_state_protection *sp)
7261{
7262 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
7263 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
7264 1 << (OP_EXCHANGE_ID - 32) |
7265 1 << (OP_CREATE_SESSION - 32) |
7266 1 << (OP_DESTROY_SESSION - 32) |
7267 1 << (OP_DESTROY_CLIENTID - 32)
7268 };
7269 unsigned int i;
7270
7271 if (sp->how == SP4_MACH_CRED) {
7272 /* Print state protect result */
7273 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
7274 for (i = 0; i <= LAST_NFS4_OP; i++) {
7275 if (test_bit(i, sp->enforce.u.longs))
7276 dfprintk(MOUNT, " enforce op %d\n", i);
7277 if (test_bit(i, sp->allow.u.longs))
7278 dfprintk(MOUNT, " allow op %d\n", i);
7279 }
7280
7281 /* make sure nothing is on enforce list that isn't supported */
7282 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
7283 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
7284 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
7285 return -EINVAL;
7286 }
7287 }
7288
7289 /*
7290 * Minimal mode - state operations are allowed to use machine
7291 * credential. Note this already happens by default, so the
7292 * client doesn't have to do anything more than the negotiation.
7293 *
7294 * NOTE: we don't care if EXCHANGE_ID is in the list -
7295 * we're already using the machine cred for exchange_id
7296 * and will never use a different cred.
7297 */
7298 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
7299 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
7300 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
7301 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
7302 dfprintk(MOUNT, "sp4_mach_cred:\n");
7303 dfprintk(MOUNT, " minimal mode enabled\n");
7304 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
7305 } else {
7306 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
7307 return -EINVAL;
7308 }
fa940720
WAA		 7309
7310 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
99ade3c7
AE		 7311 test_bit(OP_OPEN_DOWNGRADE, sp->allow.u.longs) &&
7312 test_bit(OP_DELEGRETURN, sp->allow.u.longs) &&
fa940720
WAA		 7313 test_bit(OP_LOCKU, sp->allow.u.longs)) {
7314 dfprintk(MOUNT, " cleanup mode enabled\n");
7315 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
7316 }
8b5bee2e 7317
99ade3c7
AE		 7318 if (test_bit(OP_LAYOUTRETURN, sp->allow.u.longs)) {
7319 dfprintk(MOUNT, " pnfs cleanup mode enabled\n");
7320 set_bit(NFS_SP4_MACH_CRED_PNFS_CLEANUP,
7321 &clp->cl_sp4_flags);
7322 }
7323
8b5bee2e
WAA		 7324 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
7325 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
7326 dfprintk(MOUNT, " secinfo mode enabled\n");
7327 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
7328 }
3787d506
WAA		 7329
7330 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
7331 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
7332 dfprintk(MOUNT, " stateid mode enabled\n");
7333 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
7334 }
8c21c62c
WAA		 7335
7336 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
7337 dfprintk(MOUNT, " write mode enabled\n");
7338 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
7339 }
7340
7341 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
7342 dfprintk(MOUNT, " commit mode enabled\n");
7343 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
7344 }
2031cd1a
WAA		 7345 }
7346
7347 return 0;
7348}
7349
8d89bd70
AA		 7350struct nfs41_exchange_id_data {
7351 struct nfs41_exchange_id_res res;
7352 struct nfs41_exchange_id_args args;
ad0849a7 7353 struct rpc_xprt *xprt;
8d89bd70
AA		 7354 int rpc_status;
7355};
7356
7357static void nfs4_exchange_id_done(struct rpc_task *task, void *data)
7358{
7359 struct nfs41_exchange_id_data *cdata =
7360 (struct nfs41_exchange_id_data *)data;
7361 struct nfs_client *clp = cdata->args.client;
7362 int status = task->tk_status;
7363
7364 trace_nfs4_exchange_id(clp, status);
7365
7366 if (status == 0)
7367 status = nfs4_check_cl_exchange_flags(cdata->res.flags);
ad0849a7
AA		 7368
7369 if (cdata->xprt && status == 0) {
7370 status = nfs4_detect_session_trunking(clp, &cdata->res,
7371 cdata->xprt);
7372 goto out;
7373 }
7374
8d89bd70
AA		 7375 if (status == 0)
7376 status = nfs4_sp4_select_mode(clp, &cdata->res.state_protect);
7377
7378 if (status == 0) {
7379 clp->cl_clientid = cdata->res.clientid;
7380 clp->cl_exchange_flags = cdata->res.flags;
7381 /* Client ID is not confirmed */
7382 if (!(cdata->res.flags & EXCHGID4_FLAG_CONFIRMED_R)) {
7383 clear_bit(NFS4_SESSION_ESTABLISHED,
7384 &clp->cl_session->session_state);
7385 clp->cl_seqid = cdata->res.seqid;
7386 }
7387
7388 kfree(clp->cl_serverowner);
7389 clp->cl_serverowner = cdata->res.server_owner;
7390 cdata->res.server_owner = NULL;
7391
7392 /* use the most recent implementation id */
7393 kfree(clp->cl_implid);
7394 clp->cl_implid = cdata->res.impl_id;
7395 cdata->res.impl_id = NULL;
7396
7397 if (clp->cl_serverscope != NULL &&
7398 !nfs41_same_server_scope(clp->cl_serverscope,
7399 cdata->res.server_scope)) {
7400 dprintk("%s: server_scope mismatch detected\n",
7401 __func__);
7402 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
7403 kfree(clp->cl_serverscope);
7404 clp->cl_serverscope = NULL;
7405 }
7406
7407 if (clp->cl_serverscope == NULL) {
7408 clp->cl_serverscope = cdata->res.server_scope;
7409 cdata->res.server_scope = NULL;
7410 }
ad0849a7
AA		 7411 /* Save the EXCHANGE_ID verifier session trunk tests */
7412 memcpy(clp->cl_confirm.data, cdata->args.verifier->data,
7413 sizeof(clp->cl_confirm.data));
8d89bd70 7414 }
ad0849a7 7415out:
8d89bd70 7416 cdata->rpc_status = status;
ad0849a7 7417 return;
8d89bd70
AA		 7418}
7419
7420static void nfs4_exchange_id_release(void *data)
7421{
7422 struct nfs41_exchange_id_data *cdata =
7423 (struct nfs41_exchange_id_data *)data;
7424
ad0849a7
AA		 7425 if (cdata->xprt) {
7426 xprt_put(cdata->xprt);
7427 rpc_clnt_xprt_switch_put(cdata->args.client->cl_rpcclient);
7428 }
63513232 7429 nfs_put_client(cdata->args.client);
8d89bd70
AA		 7430 kfree(cdata->res.impl_id);
7431 kfree(cdata->res.server_scope);
7432 kfree(cdata->res.server_owner);
7433 kfree(cdata);
7434}
7435
7436static const struct rpc_call_ops nfs4_exchange_id_call_ops = {
7437 .rpc_call_done = nfs4_exchange_id_done,
7438 .rpc_release = nfs4_exchange_id_release,
7439};
7440
2031cd1a
WAA		 7441/*
7442 * _nfs4_proc_exchange_id()
6bbb4ae8 7443 *
2031cd1a 7444 * Wrapper for EXCHANGE_ID operation.
99fe60d0 7445 */
2031cd1a 7446static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
ad0849a7 7447 u32 sp4_how, struct rpc_xprt *xprt)
99fe60d0
BH		 7448{
7449 nfs4_verifier verifier;
99fe60d0
BH		 7450 struct rpc_message msg = {
7451 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
99fe60d0
BH		 7452 .rpc_cred = cred,
7453 };
8d89bd70
AA		 7454 struct rpc_task_setup task_setup_data = {
7455 .rpc_client = clp->cl_rpcclient,
7456 .callback_ops = &nfs4_exchange_id_call_ops,
7457 .rpc_message = &msg,
7458 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
7459 };
7460 struct nfs41_exchange_id_data *calldata;
7461 struct rpc_task *task;
7462 int status = -EIO;
7463
7464 if (!atomic_inc_not_zero(&clp->cl_count))
7465 goto out;
7466
7467 status = -ENOMEM;
7468 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
7469 if (!calldata)
7470 goto out;
99fe60d0 7471
ad0849a7
AA		 7472 if (!xprt)
7473 nfs4_init_boot_verifier(clp, &verifier);
873e3851
JL		 7474
7475 status = nfs4_init_uniform_client_string(clp);
7476 if (status)
8d89bd70 7477 goto out_calldata;
3a6bb738
JL		 7478
7479 dprintk("NFS call exchange_id auth=%s, '%s'\n",
6bbb4ae8 7480 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3a6bb738 7481 clp->cl_owner_id);
99fe60d0 7482
8d89bd70
AA		 7483 calldata->res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
7484 GFP_NOFS);
7485 status = -ENOMEM;
7486 if (unlikely(calldata->res.server_owner == NULL))
7487 goto out_calldata;
78fe0f41 7488
8d89bd70 7489 calldata->res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 7490 GFP_NOFS);
8d89bd70 7491 if (unlikely(calldata->res.server_scope == NULL))
acdeb69d 7492 goto out_server_owner;
78fe0f41 7493
8d89bd70
AA		 7494 calldata->res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
7495 if (unlikely(calldata->res.impl_id == NULL))
7d2ed9ac 7496 goto out_server_scope;
7d2ed9ac 7497
2031cd1a
WAA		 7498 switch (sp4_how) {
7499 case SP4_NONE:
8d89bd70 7500 calldata->args.state_protect.how = SP4_NONE;
2031cd1a
WAA		 7501 break;
7502
7503 case SP4_MACH_CRED:
8d89bd70 7504 calldata->args.state_protect = nfs4_sp4_mach_cred_request;
2031cd1a
WAA		 7505 break;
7506
7507 default:
7508 /* unsupported! */
7509 WARN_ON_ONCE(1);
7510 status = -EINVAL;
6b55970b 7511 goto out_impl_id;
2031cd1a 7512 }
ad0849a7
AA		 7513 if (xprt) {
7514 calldata->xprt = xprt;
7515 task_setup_data.rpc_xprt = xprt;
7516 task_setup_data.flags =
7517 RPC_TASK_SOFT|RPC_TASK_SOFTCONN|RPC_TASK_ASYNC;
7518 calldata->args.verifier = &clp->cl_confirm;
7519 } else {
7520 calldata->args.verifier = &verifier;
7521 }
8d89bd70
AA		 7522 calldata->args.client = clp;
7523#ifdef CONFIG_NFS_V4_1_MIGRATION
7524 calldata->args.flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
7525 EXCHGID4_FLAG_BIND_PRINC_STATEID |
7526 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
7527#else
7528 calldata->args.flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
7529 EXCHGID4_FLAG_BIND_PRINC_STATEID,
7530#endif
7531 msg.rpc_argp = &calldata->args;
7532 msg.rpc_resp = &calldata->res;
7533 task_setup_data.callback_data = calldata;
2031cd1a 7534
8d89bd70 7535 task = rpc_run_task(&task_setup_data);
63513232
OK		 7536 if (IS_ERR(task))
7537 return PTR_ERR(task);
7d2ed9ac 7538
ad0849a7
AA		 7539 if (!xprt) {
7540 status = rpc_wait_for_completion_task(task);
7541 if (!status)
7542 status = calldata->rpc_status;
7543 } else /* session trunking test */
8d89bd70 7544 status = calldata->rpc_status;
ad0849a7 7545
8d89bd70 7546 rpc_put_task(task);
abe9a6d5 7547out:
177313f1 7548 if (clp->cl_implid != NULL)
6bbb4ae8 7549 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 7550 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 7551 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 7552 clp->cl_implid->date.seconds,
7553 clp->cl_implid->date.nseconds);
6bbb4ae8 7554 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0 7555 return status;
8d89bd70
AA		 7556
7557out_impl_id:
7558 kfree(calldata->res.impl_id);
7559out_server_scope:
7560 kfree(calldata->res.server_scope);
7561out_server_owner:
7562 kfree(calldata->res.server_owner);
7563out_calldata:
7564 kfree(calldata);
63513232 7565 nfs_put_client(clp);
8d89bd70 7566 goto out;
99fe60d0
BH		 7567}
7568
2031cd1a
WAA		 7569/*
7570 * nfs4_proc_exchange_id()
7571 *
7572 * Returns zero, a negative errno, or a negative NFS4ERR status code.
7573 *
7574 * Since the clientid has expired, all compounds using sessions
7575 * associated with the stale clientid will be returning
7576 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
7577 * be in some phase of session reset.
7578 *
7579 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
7580 */
7581int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
7582{
7583 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
7584 int status;
7585
7586 /* try SP4_MACH_CRED if krb5i/p */
7587 if (authflavor == RPC_AUTH_GSS_KRB5I ||
7588 authflavor == RPC_AUTH_GSS_KRB5P) {
ad0849a7 7589 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED, NULL);
2031cd1a
WAA		 7590 if (!status)
7591 return 0;
7592 }
7593
7594 /* try SP4_NONE */
ad0849a7 7595 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE, NULL);
2031cd1a
WAA		 7596}
7597
04fa2c6b
AA		 7598/**
7599 * nfs4_test_session_trunk
7600 *
7601 * This is an add_xprt_test() test function called from
7602 * rpc_clnt_setup_test_and_add_xprt.
7603 *
7604 * The rpc_xprt_switch is referrenced by rpc_clnt_setup_test_and_add_xprt
7605 * and is dereferrenced in nfs4_exchange_id_release
7606 *
7607 * Upon success, add the new transport to the rpc_clnt
7608 *
7609 * @clnt: struct rpc_clnt to get new transport
7610 * @xprt: the rpc_xprt to test
7611 * @data: call data for _nfs4_proc_exchange_id.
7612 */
7613int nfs4_test_session_trunk(struct rpc_clnt *clnt, struct rpc_xprt *xprt,
7614 void *data)
7615{
7616 struct nfs4_add_xprt_data *adata = (struct nfs4_add_xprt_data *)data;
7617 u32 sp4_how;
7618
7619 dprintk("--> %s try %s\n", __func__,
7620 xprt->address_strings[RPC_DISPLAY_ADDR]);
7621
7622 sp4_how = (adata->clp->cl_sp4_flags == 0 ? SP4_NONE : SP4_MACH_CRED);
7623
7624 /* Test connection for session trunking. Async exchange_id call */
7625 return _nfs4_proc_exchange_id(adata->clp, adata->cred, sp4_how, xprt);
2031cd1a 7626}
04fa2c6b 7627EXPORT_SYMBOL_GPL(nfs4_test_session_trunk);
2031cd1a 7628
66245539
TM		 7629static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
7630 struct rpc_cred *cred)
7631{
7632 struct rpc_message msg = {
7633 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
7634 .rpc_argp = clp,
7635 .rpc_cred = cred,
7636 };
7637 int status;
7638
7639 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7640 trace_nfs4_destroy_clientid(clp, status);
66245539 7641 if (status)
02c67525 7642 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 7643 "DESTROY_CLIENTID.", status, clp->cl_hostname);
7644 return status;
7645}
7646
7647static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
7648 struct rpc_cred *cred)
7649{
7650 unsigned int loop;
7651 int ret;
7652
7653 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
7654 ret = _nfs4_proc_destroy_clientid(clp, cred);
7655 switch (ret) {
7656 case -NFS4ERR_DELAY:
7657 case -NFS4ERR_CLIENTID_BUSY:
7658 ssleep(1);
7659 break;
7660 default:
7661 return ret;
7662 }
7663 }
7664 return 0;
7665}
7666
7667int nfs4_destroy_clientid(struct nfs_client *clp)
7668{
7669 struct rpc_cred *cred;
7670 int ret = 0;
7671
7672 if (clp->cl_mvops->minor_version < 1)
7673 goto out;
7674 if (clp->cl_exchange_flags == 0)
7675 goto out;
05f4c350
CL		 7676 if (clp->cl_preserve_clid)
7677 goto out;
73d8bde5 7678 cred = nfs4_get_clid_cred(clp);
66245539
TM		 7679 ret = nfs4_proc_destroy_clientid(clp, cred);
7680 if (cred)
7681 put_rpccred(cred);
7682 switch (ret) {
7683 case 0:
7684 case -NFS4ERR_STALE_CLIENTID:
7685 clp->cl_exchange_flags = 0;
7686 }
7687out:
7688 return ret;
7689}
7690
2050f0cc
AA		 7691struct nfs4_get_lease_time_data {
7692 struct nfs4_get_lease_time_args *args;
7693 struct nfs4_get_lease_time_res *res;
7694 struct nfs_client *clp;
7695};
7696
7697static void nfs4_get_lease_time_prepare(struct rpc_task *task,
7698 void *calldata)
7699{
2050f0cc
AA		 7700 struct nfs4_get_lease_time_data *data =
7701 (struct nfs4_get_lease_time_data *)calldata;
7702
7703 dprintk("--> %s\n", __func__);
7704 /* just setup sequence, do not trigger session recovery
7705 since we're invoked within one */
7981c8a6 7706 nfs4_setup_sequence(data->clp,
d9afbd1b
TM		 7707 &data->args->la_seq_args,
7708 &data->res->lr_seq_res,
7709 task);
2050f0cc
AA		 7710 dprintk("<-- %s\n", __func__);
7711}
7712
7713/*
7714 * Called from nfs4_state_manager thread for session setup, so don't recover
7715 * from sequence operation or clientid errors.
7716 */
7717static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
7718{
7719 struct nfs4_get_lease_time_data *data =
7720 (struct nfs4_get_lease_time_data *)calldata;
7721
7722 dprintk("--> %s\n", __func__);
14516c3a
TM		 7723 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
7724 return;
2050f0cc
AA		 7725 switch (task->tk_status) {
7726 case -NFS4ERR_DELAY:
7727 case -NFS4ERR_GRACE:
7728 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
7729 rpc_delay(task, NFS4_POLL_RETRY_MIN);
7730 task->tk_status = 0;
a8a4ae3a
AA		 7731 /* fall through */
7732 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 7733 rpc_restart_call_prepare(task);
2050f0cc
AA		 7734 return;
7735 }
2050f0cc
AA		 7736 dprintk("<-- %s\n", __func__);
7737}
7738
17280175 7739static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 7740 .rpc_call_prepare = nfs4_get_lease_time_prepare,
7741 .rpc_call_done = nfs4_get_lease_time_done,
7742};
7743
7744int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
7745{
7746 struct rpc_task *task;
7747 struct nfs4_get_lease_time_args args;
7748 struct nfs4_get_lease_time_res res = {
7749 .lr_fsinfo = fsinfo,
7750 };
7751 struct nfs4_get_lease_time_data data = {
7752 .args = &args,
7753 .res = &res,
7754 .clp = clp,
7755 };
7756 struct rpc_message msg = {
7757 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
7758 .rpc_argp = &args,
7759 .rpc_resp = &res,
7760 };
7761 struct rpc_task_setup task_setup = {
7762 .rpc_client = clp->cl_rpcclient,
7763 .rpc_message = &msg,
7764 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 7765 .callback_data = &data,
7766 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 7767 };
7768 int status;
7769
a9c92d6b 7770 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 7771 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 7772 dprintk("--> %s\n", __func__);
7773 task = rpc_run_task(&task_setup);
7774
7775 if (IS_ERR(task))
7776 status = PTR_ERR(task);
7777 else {
7778 status = task->tk_status;
7779 rpc_put_task(task);
7780 }
7781 dprintk("<-- %s return %d\n", __func__, status);
7782
7783 return status;
7784}
7785
fc931582
AA		 7786/*
7787 * Initialize the values to be used by the client in CREATE_SESSION
7788 * If nfs4_init_session set the fore channel request and response sizes,
7789 * use them.
7790 *
7791 * Set the back channel max_resp_sz_cached to zero to force the client to
7792 * always set csa_cachethis to FALSE because the current implementation
7793 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
7794 */
6b26cc8c
CL		 7795static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args,
7796 struct rpc_clnt *clnt)
fc931582 7797{
18aad3d5 7798 unsigned int max_rqst_sz, max_resp_sz;
6b26cc8c 7799 unsigned int max_bc_payload = rpc_max_bc_payload(clnt);
18aad3d5
AA		 7800
7801 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
7802 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 7803
fc931582 7804 /* Fore channel attributes */
18aad3d5
AA		 7805 args->fc_attrs.max_rqst_sz = max_rqst_sz;
7806 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 7807 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 7808 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 7809
7810 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 7811 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 7812 __func__,
7813 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 7814 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 7815
7816 /* Back channel attributes */
6b26cc8c
CL		 7817 args->bc_attrs.max_rqst_sz = max_bc_payload;
7818 args->bc_attrs.max_resp_sz = max_bc_payload;
fc931582
AA		 7819 args->bc_attrs.max_resp_sz_cached = 0;
7820 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5405fc44 7821 args->bc_attrs.max_reqs = min_t(unsigned short, max_session_cb_slots, 1);
fc931582
AA		 7822
7823 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
7824 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
7825 __func__,
7826 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
7827 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
7828 args->bc_attrs.max_reqs);
7829}
7830
79969dd1
TM		 7831static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args,
7832 struct nfs41_create_session_res *res)
8d35301d 7833{
43c2e885 7834 struct nfs4_channel_attrs *sent = &args->fc_attrs;
79969dd1 7835 struct nfs4_channel_attrs *rcvd = &res->fc_attrs;
43c2e885 7836
43c2e885
BF		 7837 if (rcvd->max_resp_sz > sent->max_resp_sz)
7838 return -EINVAL;
7839 /*
7840 * Our requested max_ops is the minimum we need; we're not
7841 * prepared to break up compounds into smaller pieces than that.
7842 * So, no point even trying to continue if the server won't
7843 * cooperate:
7844 */
7845 if (rcvd->max_ops < sent->max_ops)
7846 return -EINVAL;
7847 if (rcvd->max_reqs == 0)
7848 return -EINVAL;
b4b9a0c1
VG		 7849 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
7850 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 7851 return 0;
8d35301d
AA		 7852}
7853
79969dd1
TM		 7854static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args,
7855 struct nfs41_create_session_res *res)
43c2e885
BF		 7856{
7857 struct nfs4_channel_attrs *sent = &args->bc_attrs;
79969dd1 7858 struct nfs4_channel_attrs *rcvd = &res->bc_attrs;
8d35301d 7859
b1c0df5f
TM		 7860 if (!(res->flags & SESSION4_BACK_CHAN))
7861 goto out;
43c2e885
BF		 7862 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
7863 return -EINVAL;
7864 if (rcvd->max_resp_sz < sent->max_resp_sz)
7865 return -EINVAL;
7866 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7867 return -EINVAL;
5405fc44 7868 if (rcvd->max_ops > sent->max_ops)
43c2e885 7869 return -EINVAL;
5405fc44 7870 if (rcvd->max_reqs > sent->max_reqs)
43c2e885 7871 return -EINVAL;
b1c0df5f 7872out:
43c2e885
BF		 7873 return 0;
7874}
8d35301d 7875
8d35301d 7876static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
79969dd1 7877 struct nfs41_create_session_res *res)
8d35301d 7878{
43c2e885 7879 int ret;
8d35301d 7880
79969dd1 7881 ret = nfs4_verify_fore_channel_attrs(args, res);
43c2e885
BF		 7882 if (ret)
7883 return ret;
79969dd1
TM		 7884 return nfs4_verify_back_channel_attrs(args, res);
7885}
7886
7887static void nfs4_update_session(struct nfs4_session *session,
7888 struct nfs41_create_session_res *res)
7889{
7890 nfs4_copy_sessionid(&session->sess_id, &res->sessionid);
e11259f9
TM		 7891 /* Mark client id and session as being confirmed */
7892 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;
7893 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state);
79969dd1
TM		 7894 session->flags = res->flags;
7895 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs));
b1c0df5f
TM		 7896 if (res->flags & SESSION4_BACK_CHAN)
7897 memcpy(&session->bc_attrs, &res->bc_attrs,
7898 sizeof(session->bc_attrs));
8d35301d
AA		 7899}
7900
848f5bda
TM		 7901static int _nfs4_proc_create_session(struct nfs_client *clp,
7902 struct rpc_cred *cred)
fc931582
AA		 7903{
7904 struct nfs4_session *session = clp->cl_session;
7905 struct nfs41_create_session_args args = {
7906 .client = clp,
79969dd1
TM		 7907 .clientid = clp->cl_clientid,
7908 .seqid = clp->cl_seqid,
fc931582
AA		 7909 .cb_program = NFS4_CALLBACK,
7910 };
79969dd1
TM		 7911 struct nfs41_create_session_res res;
7912
fc931582
AA		 7913 struct rpc_message msg = {
7914 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
7915 .rpc_argp = &args,
7916 .rpc_resp = &res,
848f5bda 7917 .rpc_cred = cred,
fc931582
AA		 7918 };
7919 int status;
7920
6b26cc8c 7921 nfs4_init_channel_attrs(&args, clp->cl_rpcclient);
0f91421e 7922 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 7923
1bd714f2 7924 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7925 trace_nfs4_create_session(clp, status);
fc931582 7926
b519d408
TM		 7927 switch (status) {
7928 case -NFS4ERR_STALE_CLIENTID:
7929 case -NFS4ERR_DELAY:
7930 case -ETIMEDOUT:
7931 case -EACCES:
7932 case -EAGAIN:
7933 goto out;
7934 };
7935
7936 clp->cl_seqid++;
43095d39 7937 if (!status) {
8d35301d 7938 /* Verify the session's negotiated channel_attrs values */
79969dd1 7939 status = nfs4_verify_channel_attrs(&args, &res);
fc931582 7940 /* Increment the clientid slot sequence id */
79969dd1
TM		 7941 if (status)
7942 goto out;
7943 nfs4_update_session(session, &res);
fc931582 7944 }
79969dd1 7945out:
fc931582
AA		 7946 return status;
7947}
7948
7949/*
7950 * Issues a CREATE_SESSION operation to the server.
7951 * It is the responsibility of the caller to verify the session is
7952 * expired before calling this routine.
7953 */
848f5bda 7954int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 7955{
7956 int status;
7957 unsigned *ptr;
fc931582
AA		 7958 struct nfs4_session *session = clp->cl_session;
7959
7960 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
7961
848f5bda 7962 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 7963 if (status)
7964 goto out;
7965
aacd5537
AA		 7966 /* Init or reset the session slot tables */
7967 status = nfs4_setup_session_slot_tables(session);
7968 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 7969 if (status)
7970 goto out;
7971
7972 ptr = (unsigned *)&session->sess_id.data[0];
7973 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
7974 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 7975out:
7976 dprintk("<-- %s\n", __func__);
7977 return status;
7978}
7979
0f3e66c6
AA		 7980/*
7981 * Issue the over-the-wire RPC DESTROY_SESSION.
7982 * The caller must serialize access to this routine.
7983 */
848f5bda
TM		 7984int nfs4_proc_destroy_session(struct nfs4_session *session,
7985 struct rpc_cred *cred)
0f3e66c6 7986{
848f5bda
TM		 7987 struct rpc_message msg = {
7988 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
7989 .rpc_argp = session,
7990 .rpc_cred = cred,
7991 };
0f3e66c6 7992 int status = 0;
0f3e66c6
AA		 7993
7994 dprintk("--> nfs4_proc_destroy_session\n");
7995
7996 /* session is still being setup */
e11259f9
TM		 7997 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state))
7998 return 0;
0f3e66c6 7999
1bd714f2 8000 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 8001 trace_nfs4_destroy_session(session->clp, status);
0f3e66c6
AA		 8002
8003 if (status)
08106ac7 8004 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 8005 "Session has been destroyed regardless...\n", status);
8006
8007 dprintk("<-- nfs4_proc_destroy_session\n");
8008 return status;
8009}
8010
fc01cea9
AA		 8011/*
8012 * Renew the cl_session lease.
8013 */
d5f8d3fe
TM		 8014struct nfs4_sequence_data {
8015 struct nfs_client *clp;
8016 struct nfs4_sequence_args args;
8017 struct nfs4_sequence_res res;
8018};
8019
dc96aef9
AB		 8020static void nfs41_sequence_release(void *data)
8021{
d5f8d3fe
TM		 8022 struct nfs4_sequence_data *calldata = data;
8023 struct nfs_client *clp = calldata->clp;
dc96aef9 8024
7135840f
AB		 8025 if (atomic_read(&clp->cl_count) > 1)
8026 nfs4_schedule_state_renewal(clp);
8027 nfs_put_client(clp);
d5f8d3fe 8028 kfree(calldata);
dc96aef9
AB		 8029}
8030
aa5190d0
TM		 8031static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
8032{
8033 switch(task->tk_status) {
8034 case -NFS4ERR_DELAY:
aa5190d0
TM		 8035 rpc_delay(task, NFS4_POLL_RETRY_MAX);
8036 return -EAGAIN;
8037 default:
0400a6b0 8038 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 8039 }
8040 return 0;
8041}
8042
dc96aef9 8043static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 8044{
d5f8d3fe
TM		 8045 struct nfs4_sequence_data *calldata = data;
8046 struct nfs_client *clp = calldata->clp;
fc01cea9 8047
14516c3a
TM		 8048 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
8049 return;
fc01cea9 8050
c6d01c6f 8051 trace_nfs4_sequence(clp, task->tk_status);
fc01cea9
AA		 8052 if (task->tk_status < 0) {
8053 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 8054 if (atomic_read(&clp->cl_count) == 1)
8055 goto out;
fc01cea9 8056
aa5190d0
TM		 8057 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
8058 rpc_restart_call_prepare(task);
fc01cea9
AA		 8059 return;
8060 }
8061 }
fc01cea9 8062 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 8063out:
fc01cea9
AA		 8064 dprintk("<-- %s\n", __func__);
8065}
8066
8067static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
8068{
d5f8d3fe
TM		 8069 struct nfs4_sequence_data *calldata = data;
8070 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 8071 struct nfs4_sequence_args *args;
8072 struct nfs4_sequence_res *res;
8073
fc01cea9
AA		 8074 args = task->tk_msg.rpc_argp;
8075 res = task->tk_msg.rpc_resp;
8076
7981c8a6 8077 nfs4_setup_sequence(clp, args, res, task);
fc01cea9
AA		 8078}
8079
8080static const struct rpc_call_ops nfs41_sequence_ops = {
8081 .rpc_call_done = nfs41_sequence_call_done,
8082 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 8083 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 8084};
8085
8fe72bac
TM		 8086static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
8087 struct rpc_cred *cred,
8088 bool is_privileged)
fc01cea9 8089{
d5f8d3fe 8090 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 8091 struct rpc_message msg = {
8092 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
8093 .rpc_cred = cred,
8094 };
71ac6da9
TM		 8095 struct rpc_task_setup task_setup_data = {
8096 .rpc_client = clp->cl_rpcclient,
8097 .rpc_message = &msg,
8fe72bac 8098 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 8099 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 8100 };
fc01cea9 8101
7135840f 8102 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 8103 return ERR_PTR(-EIO);
dfb4f309 8104 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 8105 if (calldata == NULL) {
7135840f 8106 nfs_put_client(clp);
71ac6da9 8107 return ERR_PTR(-ENOMEM);
fc01cea9 8108 }
a9c92d6b 8109 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 8110 if (is_privileged)
8111 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 8112 msg.rpc_argp = &calldata->args;
8113 msg.rpc_resp = &calldata->res;
8114 calldata->clp = clp;
71ac6da9 8115 task_setup_data.callback_data = calldata;
fc01cea9 8116
71ac6da9
TM		 8117 return rpc_run_task(&task_setup_data);
8118}
8119
2f60ea6b 8120static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 8121{
8122 struct rpc_task *task;
8123 int ret = 0;
8124
2f60ea6b 8125 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
d1f456b0 8126 return -EAGAIN;
8fe72bac 8127 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 8128 if (IS_ERR(task))
8129 ret = PTR_ERR(task);
8130 else
bf294b41 8131 rpc_put_task_async(task);
71ac6da9
TM		 8132 dprintk("<-- %s status=%d\n", __func__, ret);
8133 return ret;
8134}
8135
8136static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
8137{
8138 struct rpc_task *task;
8139 int ret;
8140
8fe72bac 8141 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 8142 if (IS_ERR(task)) {
8143 ret = PTR_ERR(task);
8144 goto out;
8145 }
8146 ret = rpc_wait_for_completion_task(task);
be824167 8147 if (!ret)
71ac6da9
TM		 8148 ret = task->tk_status;
8149 rpc_put_task(task);
8150out:
8151 dprintk("<-- %s status=%d\n", __func__, ret);
8152 return ret;
fc01cea9
AA		 8153}
8154
fce5c838
RL		 8155struct nfs4_reclaim_complete_data {
8156 struct nfs_client *clp;
8157 struct nfs41_reclaim_complete_args arg;
8158 struct nfs41_reclaim_complete_res res;
8159};
8160
8161static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
8162{
8163 struct nfs4_reclaim_complete_data *calldata = data;
8164
7981c8a6 8165 nfs4_setup_sequence(calldata->clp,
d9afbd1b
TM		 8166 &calldata->arg.seq_args,
8167 &calldata->res.seq_res,
8168 task);
fce5c838
RL		 8169}
8170
aa5190d0
TM		 8171static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
8172{
8173 switch(task->tk_status) {
8174 case 0:
8175 case -NFS4ERR_COMPLETE_ALREADY:
8176 case -NFS4ERR_WRONG_CRED: /* What to do here? */
8177 break;
8178 case -NFS4ERR_DELAY:
aa5190d0 8179 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 8180 /* fall through */
8181 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 8182 return -EAGAIN;
8183 default:
0400a6b0 8184 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 8185 }
8186 return 0;
8187}
8188
fce5c838
RL		 8189static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
8190{
8191 struct nfs4_reclaim_complete_data *calldata = data;
8192 struct nfs_client *clp = calldata->clp;
8193 struct nfs4_sequence_res *res = &calldata->res.seq_res;
8194
8195 dprintk("--> %s\n", __func__);
14516c3a
TM		 8196 if (!nfs41_sequence_done(task, res))
8197 return;
fce5c838 8198
c6d01c6f 8199 trace_nfs4_reclaim_complete(clp, task->tk_status);
aa5190d0
TM		 8200 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
8201 rpc_restart_call_prepare(task);
8202 return;
8203 }
fce5c838
RL		 8204 dprintk("<-- %s\n", __func__);
8205}
8206
8207static void nfs4_free_reclaim_complete_data(void *data)
8208{
8209 struct nfs4_reclaim_complete_data *calldata = data;
8210
8211 kfree(calldata);
8212}
8213
8214static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
8215 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
8216 .rpc_call_done = nfs4_reclaim_complete_done,
8217 .rpc_release = nfs4_free_reclaim_complete_data,
8218};
8219
8220/*
8221 * Issue a global reclaim complete.
8222 */
965e9c23
TM		 8223static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
8224 struct rpc_cred *cred)
fce5c838
RL		 8225{
8226 struct nfs4_reclaim_complete_data *calldata;
8227 struct rpc_task *task;
8228 struct rpc_message msg = {
8229 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 8230 .rpc_cred = cred,
fce5c838
RL		 8231 };
8232 struct rpc_task_setup task_setup_data = {
8233 .rpc_client = clp->cl_rpcclient,
8234 .rpc_message = &msg,
8235 .callback_ops = &nfs4_reclaim_complete_call_ops,
8236 .flags = RPC_TASK_ASYNC,
8237 };
8238 int status = -ENOMEM;
8239
8240 dprintk("--> %s\n", __func__);
8535b2be 8241 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 8242 if (calldata == NULL)
8243 goto out;
8244 calldata->clp = clp;
8245 calldata->arg.one_fs = 0;
fce5c838 8246
a9c92d6b 8247 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 8248 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 8249 msg.rpc_argp = &calldata->arg;
8250 msg.rpc_resp = &calldata->res;
8251 task_setup_data.callback_data = calldata;
8252 task = rpc_run_task(&task_setup_data);
acf82b85 8253 if (IS_ERR(task)) {
fce5c838 8254 status = PTR_ERR(task);
acf82b85
DC		 8255 goto out;
8256 }
820bf85c 8257 status = rpc_wait_for_completion_task(task);
c34c32ea
AA		 8258 if (status == 0)
8259 status = task->tk_status;
fce5c838 8260 rpc_put_task(task);
acf82b85 8261 return 0;
fce5c838
RL		 8262out:
8263 dprintk("<-- %s status=%d\n", __func__, status);
8264 return status;
8265}
b1f69b75
AA		 8266
8267static void
8268nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
8269{
8270 struct nfs4_layoutget *lgp = calldata;
c31663d4 8271 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
b1f69b75
AA		 8272
8273 dprintk("--> %s\n", __func__);
7981c8a6 8274 nfs4_setup_sequence(server->nfs_client, &lgp->args.seq_args,
183d9e7b
JL		 8275 &lgp->res.seq_res, task);
8276 dprintk("<-- %s\n", __func__);
b1f69b75
AA		 8277}
8278
8279static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
8280{
8281 struct nfs4_layoutget *lgp = calldata;
183d9e7b
JL		 8282
8283 dprintk("--> %s\n", __func__);
2e80dbe7 8284 nfs41_sequence_process(task, &lgp->res.seq_res);
183d9e7b
JL		 8285 dprintk("<-- %s\n", __func__);
8286}
8287
8288static int
8289nfs4_layoutget_handle_exception(struct rpc_task *task,
8290 struct nfs4_layoutget *lgp, struct nfs4_exception *exception)
8291{
ee314c2a
TM		 8292 struct inode *inode = lgp->args.inode;
8293 struct nfs_server *server = NFS_SERVER(inode);
8294 struct pnfs_layout_hdr *lo;
e85d7ee4
TM		 8295 int nfs4err = task->tk_status;
8296 int err, status = 0;
f7db0b28 8297 LIST_HEAD(head);
b1f69b75 8298
ed7e5423 8299 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
b1f69b75 8300
e85d7ee4 8301 switch (nfs4err) {
b1f69b75 8302 case 0:
ee314c2a 8303 goto out;
7c1e6e58
PT		 8304
8305 /*
8306 * NFS4ERR_LAYOUTUNAVAILABLE means we are not supposed to use pnfs
8307 * on the file. set tk_status to -ENODATA to tell upper layer to
8308 * retry go inband.
8309 */
8310 case -NFS4ERR_LAYOUTUNAVAILABLE:
183d9e7b 8311 status = -ENODATA;
7c1e6e58 8312 goto out;
21b874c8
TM		 8313 /*
8314 * NFS4ERR_BADLAYOUT means the MDS cannot return a layout of
8315 * length lgp->args.minlength != 0 (see RFC5661 section 18.43.3).
8316 */
8317 case -NFS4ERR_BADLAYOUT:
183d9e7b
JL		 8318 status = -EOVERFLOW;
8319 goto out;
ed7e5423
BH		 8320 /*
8321 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
21b874c8
TM		 8322 * (or clients) writing to the same RAID stripe except when
8323 * the minlength argument is 0 (see RFC5661 section 18.43.3).
183d9e7b
JL		 8324 *
8325 * Treat it like we would RECALLCONFLICT -- we retry for a little
8326 * while, and then eventually give up.
ed7e5423 8327 */
b1f69b75 8328 case -NFS4ERR_LAYOUTTRYLATER:
183d9e7b
JL		 8329 if (lgp->args.minlength == 0) {
8330 status = -EOVERFLOW;
8331 goto out;
ed7e5423 8332 }
e85d7ee4
TM		 8333 status = -EBUSY;
8334 break;
183d9e7b 8335 case -NFS4ERR_RECALLCONFLICT:
183d9e7b 8336 status = -ERECALLCONFLICT;
e85d7ee4 8337 break;
26f47443
TM		 8338 case -NFS4ERR_DELEG_REVOKED:
8339 case -NFS4ERR_ADMIN_REVOKED:
ee314c2a
TM		 8340 case -NFS4ERR_EXPIRED:
8341 case -NFS4ERR_BAD_STATEID:
183d9e7b 8342 exception->timeout = 0;
ee314c2a 8343 spin_lock(&inode->i_lock);
f7db0b28
TM		 8344 lo = NFS_I(inode)->layout;
8345 /* If the open stateid was bad, then recover it. */
8346 if (!lo || test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) ||
8347 nfs4_stateid_match_other(&lgp->args.stateid,
2259f960 8348 &lgp->args.ctx->state->stateid)) {
ee314c2a 8349 spin_unlock(&inode->i_lock);
183d9e7b 8350 exception->state = lgp->args.ctx->state;
26f47443 8351 exception->stateid = &lgp->args.stateid;
2259f960
TM		 8352 break;
8353 }
f7db0b28
TM		 8354
8355 /*
8356 * Mark the bad layout state as invalid, then retry
8357 */
668f455d 8358 pnfs_mark_layout_stateid_invalid(lo, &head);
f7db0b28
TM		 8359 spin_unlock(&inode->i_lock);
8360 pnfs_free_lseg_list(&head);
8361 status = -EAGAIN;
8362 goto out;
b1f69b75 8363 }
183d9e7b 8364
8ac09251 8365 nfs4_sequence_free_slot(&lgp->res.seq_res);
e85d7ee4
TM		 8366 err = nfs4_handle_exception(server, nfs4err, exception);
8367 if (!status) {
8368 if (exception->retry)
8369 status = -EAGAIN;
8370 else
8371 status = err;
8372 }
ee314c2a 8373out:
b1f69b75 8374 dprintk("<-- %s\n", __func__);
183d9e7b 8375 return status;
b1f69b75
AA		 8376}
8377
8554116e
IK		 8378static size_t max_response_pages(struct nfs_server *server)
8379{
8380 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
8381 return nfs_page_array_len(0, max_resp_sz);
8382}
8383
8384static void nfs4_free_pages(struct page **pages, size_t size)
8385{
8386 int i;
8387
8388 if (!pages)
8389 return;
8390
8391 for (i = 0; i < size; i++) {
8392 if (!pages[i])
8393 break;
8394 __free_page(pages[i]);
8395 }
8396 kfree(pages);
8397}
8398
8399static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
8400{
8401 struct page **pages;
8402 int i;
8403
8404 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
8405 if (!pages) {
8406 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
8407 return NULL;
8408 }
8409
8410 for (i = 0; i < size; i++) {
8411 pages[i] = alloc_page(gfp_flags);
8412 if (!pages[i]) {
8413 dprintk("%s: failed to allocate page\n", __func__);
8414 nfs4_free_pages(pages, size);
8415 return NULL;
8416 }
8417 }
8418
8419 return pages;
8420}
8421
b1f69b75
AA		 8422static void nfs4_layoutget_release(void *calldata)
8423{
8424 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 8425 struct inode *inode = lgp->args.inode;
8426 struct nfs_server *server = NFS_SERVER(inode);
8554116e 8427 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 8428
8429 dprintk("--> %s\n", __func__);
8554116e 8430 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 8431 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 8432 put_nfs_open_context(lgp->args.ctx);
8433 kfree(calldata);
8434 dprintk("<-- %s\n", __func__);
8435}
8436
8437static const struct rpc_call_ops nfs4_layoutget_call_ops = {
8438 .rpc_call_prepare = nfs4_layoutget_prepare,
8439 .rpc_call_done = nfs4_layoutget_done,
8440 .rpc_release = nfs4_layoutget_release,
8441};
8442
a0b0a6e3 8443struct pnfs_layout_segment *
183d9e7b 8444nfs4_proc_layoutget(struct nfs4_layoutget *lgp, long *timeout, gfp_t gfp_flags)
b1f69b75 8445{
a47970ff
WAA		 8446 struct inode *inode = lgp->args.inode;
8447 struct nfs_server *server = NFS_SERVER(inode);
8554116e 8448 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 8449 struct rpc_task *task;
8450 struct rpc_message msg = {
8451 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
8452 .rpc_argp = &lgp->args,
8453 .rpc_resp = &lgp->res,
6ab59344 8454 .rpc_cred = lgp->cred,
b1f69b75
AA		 8455 };
8456 struct rpc_task_setup task_setup_data = {
8457 .rpc_client = server->client,
8458 .rpc_message = &msg,
8459 .callback_ops = &nfs4_layoutget_call_ops,
8460 .callback_data = lgp,
8461 .flags = RPC_TASK_ASYNC,
8462 };
a0b0a6e3 8463 struct pnfs_layout_segment *lseg = NULL;
bc23676c
TM		 8464 struct nfs4_exception exception = {
8465 .inode = inode,
8466 .timeout = *timeout,
8467 };
b1f69b75
AA		 8468 int status = 0;
8469
8470 dprintk("--> %s\n", __func__);
8471
4bd5a980
PT		 8472 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
8473 pnfs_get_layout_hdr(NFS_I(inode)->layout);
8474
8554116e
IK		 8475 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
8476 if (!lgp->args.layout.pages) {
8477 nfs4_layoutget_release(lgp);
a0b0a6e3 8478 return ERR_PTR(-ENOMEM);
8554116e
IK		 8479 }
8480 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
8481
35124a09 8482 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 8483 lgp->res.seq_res.sr_slot = NULL;
a9c92d6b 8484 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff 8485
b1f69b75
AA		 8486 task = rpc_run_task(&task_setup_data);
8487 if (IS_ERR(task))
a0b0a6e3 8488 return ERR_CAST(task);
820bf85c 8489 status = rpc_wait_for_completion_task(task);
183d9e7b
JL		 8490 if (status == 0) {
8491 status = nfs4_layoutget_handle_exception(task, lgp, &exception);
8492 *timeout = exception.timeout;
8493 }
8494
1037e6ea
TM		 8495 trace_nfs4_layoutget(lgp->args.ctx,
8496 &lgp->args.range,
8497 &lgp->res.range,
48c9579a 8498 &lgp->res.stateid,
1037e6ea 8499 status);
183d9e7b 8500
085b7a45
WAA		 8501 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
8502 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 8503 lseg = pnfs_layout_process(lgp);
2e80dbe7 8504 nfs4_sequence_free_slot(&lgp->res.seq_res);
b1f69b75
AA		 8505 rpc_put_task(task);
8506 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 8507 if (status)
8508 return ERR_PTR(status);
8509 return lseg;
b1f69b75
AA		 8510}
8511
cbe82603
BH		 8512static void
8513nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
8514{
8515 struct nfs4_layoutreturn *lrp = calldata;
8516
8517 dprintk("--> %s\n", __func__);
7981c8a6 8518 nfs4_setup_sequence(lrp->clp,
d9afbd1b
TM		 8519 &lrp->args.seq_args,
8520 &lrp->res.seq_res,
8521 task);
cbe82603
BH		 8522}
8523
8524static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
8525{
8526 struct nfs4_layoutreturn *lrp = calldata;
8527 struct nfs_server *server;
8528
8529 dprintk("--> %s\n", __func__);
8530
2e80dbe7 8531 if (!nfs41_sequence_process(task, &lrp->res.seq_res))
cbe82603
BH		 8532 return;
8533
8534 server = NFS_SERVER(lrp->args.inode);
f22e5edd
TM		 8535 switch (task->tk_status) {
8536 default:
8537 task->tk_status = 0;
8538 case 0:
8539 break;
8540 case -NFS4ERR_DELAY:
8478eaa1 8541 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
f22e5edd 8542 break;
2e80dbe7 8543 nfs4_sequence_free_slot(&lrp->res.seq_res);
d00c5d43 8544 rpc_restart_call_prepare(task);
cbe82603
BH		 8545 return;
8546 }
cbe82603
BH		 8547 dprintk("<-- %s\n", __func__);
8548}
8549
8550static void nfs4_layoutreturn_release(void *calldata)
8551{
8552 struct nfs4_layoutreturn *lrp = calldata;
849b286f 8553 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 8554
8555 dprintk("--> %s\n", __func__);
2a974425 8556 pnfs_layoutreturn_free_lsegs(lo, &lrp->args.stateid, &lrp->args.range,
68f74479 8557 lrp->res.lrs_present ? &lrp->res.stateid : NULL);
2e80dbe7 8558 nfs4_sequence_free_slot(&lrp->res.seq_res);
4d796d75
TM		 8559 if (lrp->ld_private.ops && lrp->ld_private.ops->free)
8560 lrp->ld_private.ops->free(&lrp->ld_private);
2f065ddb
TM		 8561 pnfs_put_layout_hdr(lrp->args.layout);
8562 nfs_iput_and_deactive(lrp->inode);
cbe82603
BH		 8563 kfree(calldata);
8564 dprintk("<-- %s\n", __func__);
8565}
8566
8567static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
8568 .rpc_call_prepare = nfs4_layoutreturn_prepare,
8569 .rpc_call_done = nfs4_layoutreturn_done,
8570 .rpc_release = nfs4_layoutreturn_release,
8571};
8572
6c16605d 8573int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync)
cbe82603
BH		 8574{
8575 struct rpc_task *task;
8576 struct rpc_message msg = {
8577 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
8578 .rpc_argp = &lrp->args,
8579 .rpc_resp = &lrp->res,
9556000d 8580 .rpc_cred = lrp->cred,
cbe82603
BH		 8581 };
8582 struct rpc_task_setup task_setup_data = {
1771c577 8583 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
cbe82603
BH		 8584 .rpc_message = &msg,
8585 .callback_ops = &nfs4_layoutreturn_call_ops,
8586 .callback_data = lrp,
8587 };
6c16605d 8588 int status = 0;
cbe82603 8589
99ade3c7
AE		 8590 nfs4_state_protect(NFS_SERVER(lrp->args.inode)->nfs_client,
8591 NFS_SP4_MACH_CRED_PNFS_CLEANUP,
8592 &task_setup_data.rpc_client, &msg);
8593
cbe82603 8594 dprintk("--> %s\n", __func__);
5a0ec8ac
TM		 8595 if (!sync) {
8596 lrp->inode = nfs_igrab_and_active(lrp->args.inode);
8597 if (!lrp->inode) {
8598 nfs4_layoutreturn_release(lrp);
8599 return -EAGAIN;
8600 }
8601 task_setup_data.flags |= RPC_TASK_ASYNC;
8602 }
a9c92d6b 8603 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 8604 task = rpc_run_task(&task_setup_data);
8605 if (IS_ERR(task))
8606 return PTR_ERR(task);
5a0ec8ac
TM		 8607 if (sync)
8608 status = task->tk_status;
48c9579a 8609 trace_nfs4_layoutreturn(lrp->args.inode, &lrp->args.stateid, status);
cbe82603
BH		 8610 dprintk("<-- %s status=%d\n", __func__, status);
8611 rpc_put_task(task);
8612 return status;
8613}
8614
b1f69b75 8615static int
cd5875fe
TM		 8616_nfs4_proc_getdeviceinfo(struct nfs_server *server,
8617 struct pnfs_device *pdev,
8618 struct rpc_cred *cred)
b1f69b75
AA		 8619{
8620 struct nfs4_getdeviceinfo_args args = {
8621 .pdev = pdev,
4e590803
TM		 8622 .notify_types = NOTIFY_DEVICEID4_CHANGE |
8623 NOTIFY_DEVICEID4_DELETE,
b1f69b75
AA		 8624 };
8625 struct nfs4_getdeviceinfo_res res = {
8626 .pdev = pdev,
8627 };
8628 struct rpc_message msg = {
8629 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
8630 .rpc_argp = &args,
8631 .rpc_resp = &res,
cd5875fe 8632 .rpc_cred = cred,
b1f69b75
AA		 8633 };
8634 int status;
8635
8636 dprintk("--> %s\n", __func__);
7c513058 8637 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4e590803
TM		 8638 if (res.notification & ~args.notify_types)
8639 dprintk("%s: unsupported notification\n", __func__);
df52699e
TM		 8640 if (res.notification != args.notify_types)
8641 pdev->nocache = 1;
4e590803 8642
b1f69b75
AA		 8643 dprintk("<-- %s status=%d\n", __func__, status);
8644
8645 return status;
8646}
8647
cd5875fe
TM		 8648int nfs4_proc_getdeviceinfo(struct nfs_server *server,
8649 struct pnfs_device *pdev,
8650 struct rpc_cred *cred)
b1f69b75
AA		 8651{
8652 struct nfs4_exception exception = { };
8653 int err;
8654
8655 do {
8656 err = nfs4_handle_exception(server,
cd5875fe 8657 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 8658 &exception);
8659 } while (exception.retry);
8660 return err;
8661}
8662EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
8663
863a3c6c
AA		 8664static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
8665{
8666 struct nfs4_layoutcommit_data *data = calldata;
8667 struct nfs_server *server = NFS_SERVER(data->args.inode);
8668
7981c8a6 8669 nfs4_setup_sequence(server->nfs_client,
d9afbd1b
TM		 8670 &data->args.seq_args,
8671 &data->res.seq_res,
8672 task);
863a3c6c
AA		 8673}
8674
8675static void
8676nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
8677{
8678 struct nfs4_layoutcommit_data *data = calldata;
8679 struct nfs_server *server = NFS_SERVER(data->args.inode);
8680
6ba7db34 8681 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 8682 return;
8683
8684 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 8685 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
8686 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
8687 case -NFS4ERR_BADLAYOUT: /* no layout */
8688 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 8689 task->tk_status = 0;
e59d27e0 8690 case 0:
e59d27e0
TM		 8691 break;
8692 default:
8478eaa1 8693 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) {
e59d27e0
TM		 8694 rpc_restart_call_prepare(task);
8695 return;
8696 }
8697 }
863a3c6c
AA		 8698}
8699
8700static void nfs4_layoutcommit_release(void *calldata)
8701{
8702 struct nfs4_layoutcommit_data *data = calldata;
8703
db29c089 8704 pnfs_cleanup_layoutcommit(data);
d8c951c3
TM		 8705 nfs_post_op_update_inode_force_wcc(data->args.inode,
8706 data->res.fattr);
863a3c6c 8707 put_rpccred(data->cred);
472e2594 8708 nfs_iput_and_deactive(data->inode);
863a3c6c
AA		 8709 kfree(data);
8710}
8711
8712static const struct rpc_call_ops nfs4_layoutcommit_ops = {
8713 .rpc_call_prepare = nfs4_layoutcommit_prepare,
8714 .rpc_call_done = nfs4_layoutcommit_done,
8715 .rpc_release = nfs4_layoutcommit_release,
8716};
8717
8718int
ef311537 8719nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 8720{
8721 struct rpc_message msg = {
8722 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
8723 .rpc_argp = &data->args,
8724 .rpc_resp = &data->res,
8725 .rpc_cred = data->cred,
8726 };
8727 struct rpc_task_setup task_setup_data = {
8728 .task = &data->task,
8729 .rpc_client = NFS_CLIENT(data->args.inode),
8730 .rpc_message = &msg,
8731 .callback_ops = &nfs4_layoutcommit_ops,
8732 .callback_data = data,
863a3c6c
AA		 8733 };
8734 struct rpc_task *task;
8735 int status = 0;
8736
b4839ebe
KM		 8737 dprintk("NFS: initiating layoutcommit call. sync %d "
8738 "lbw: %llu inode %lu\n", sync,
863a3c6c
AA		 8739 data->args.lastbytewritten,
8740 data->args.inode->i_ino);
8741
472e2594
TM		 8742 if (!sync) {
8743 data->inode = nfs_igrab_and_active(data->args.inode);
8744 if (data->inode == NULL) {
8745 nfs4_layoutcommit_release(data);
8746 return -EAGAIN;
8747 }
8748 task_setup_data.flags = RPC_TASK_ASYNC;
8749 }
a9c92d6b 8750 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 8751 task = rpc_run_task(&task_setup_data);
8752 if (IS_ERR(task))
8753 return PTR_ERR(task);
472e2594
TM		 8754 if (sync)
8755 status = task->tk_status;
48c9579a 8756 trace_nfs4_layoutcommit(data->args.inode, &data->args.stateid, status);
863a3c6c
AA		 8757 dprintk("%s: status %d\n", __func__, status);
8758 rpc_put_task(task);
8759 return status;
8760}
fca78d6d 8761
97431204
AA		 8762/**
8763 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
8764 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
8765 */
fca78d6d
BS		 8766static int
8767_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
b1b3e136
WAA		 8768 struct nfs_fsinfo *info,
8769 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
fca78d6d
BS		 8770{
8771 struct nfs41_secinfo_no_name_args args = {
8772 .style = SECINFO_STYLE_CURRENT_FH,
8773 };
8774 struct nfs4_secinfo_res res = {
8775 .flavors = flavors,
8776 };
8777 struct rpc_message msg = {
8778 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
8779 .rpc_argp = &args,
8780 .rpc_resp = &res,
8781 };
b1b3e136 8782 struct rpc_clnt *clnt = server->client;
7cb852df 8783 struct rpc_cred *cred = NULL;
b1b3e136
WAA		 8784 int status;
8785
8786 if (use_integrity) {
8787 clnt = server->nfs_client->cl_rpcclient;
7cb852df
WAA		 8788 cred = nfs4_get_clid_cred(server->nfs_client);
8789 msg.rpc_cred = cred;
b1b3e136
WAA		 8790 }
8791
8792 dprintk("--> %s\n", __func__);
8793 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
8794 &res.seq_res, 0);
8795 dprintk("<-- %s status=%d\n", __func__, status);
8796
7cb852df
WAA		 8797 if (cred)
8798 put_rpccred(cred);
b1b3e136
WAA		 8799
8800 return status;
fca78d6d
BS		 8801}
8802
8803static int
8804nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8805 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
8806{
8807 struct nfs4_exception exception = { };
8808 int err;
8809 do {
b1b3e136
WAA		 8810 /* first try using integrity protection */
8811 err = -NFS4ERR_WRONGSEC;
8812
8813 /* try to use integrity protection with machine cred */
8814 if (_nfs4_is_integrity_protected(server->nfs_client))
8815 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8816 flavors, true);
8817
8818 /*
8819 * if unable to use integrity protection, or SECINFO with
8820 * integrity protection returns NFS4ERR_WRONGSEC (which is
8821 * disallowed by spec, but exists in deployed servers) use
8822 * the current filesystem's rpc_client and the user cred.
8823 */
8824 if (err == -NFS4ERR_WRONGSEC)
8825 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8826 flavors, false);
8827
fca78d6d
BS		 8828 switch (err) {
8829 case 0:
8830 case -NFS4ERR_WRONGSEC:
78b19bae 8831 case -ENOTSUPP:
05e9cfb4 8832 goto out;
fca78d6d
BS		 8833 default:
8834 err = nfs4_handle_exception(server, err, &exception);
8835 }
8836 } while (exception.retry);
05e9cfb4 8837out:
fca78d6d
BS		 8838 return err;
8839}
8840
8841static int
8842nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
8843 struct nfs_fsinfo *info)
8844{
8845 int err;
8846 struct page *page;
367156d9 8847 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
fca78d6d 8848 struct nfs4_secinfo_flavors *flavors;
58a8cf12
WAA		 8849 struct nfs4_secinfo4 *secinfo;
8850 int i;
fca78d6d
BS		 8851
8852 page = alloc_page(GFP_KERNEL);
8853 if (!page) {
8854 err = -ENOMEM;
8855 goto out;
8856 }
8857
8858 flavors = page_address(page);
8859 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
8860
8861 /*
8862 * Fall back on "guess and check" method if
8863 * the server doesn't support SECINFO_NO_NAME
8864 */
78b19bae 8865 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
fca78d6d
BS		 8866 err = nfs4_find_root_sec(server, fhandle, info);
8867 goto out_freepage;
8868 }
8869 if (err)
8870 goto out_freepage;
8871
58a8cf12
WAA		 8872 for (i = 0; i < flavors->num_flavors; i++) {
8873 secinfo = &flavors->flavors[i];
8874
8875 switch (secinfo->flavor) {
8876 case RPC_AUTH_NULL:
8877 case RPC_AUTH_UNIX:
8878 case RPC_AUTH_GSS:
8879 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
8880 &secinfo->flavor_info);
8881 break;
8882 default:
8883 flavor = RPC_AUTH_MAXFLAVOR;
8884 break;
8885 }
8886
4d4b69dd
WAA		 8887 if (!nfs_auth_info_match(&server->auth_info, flavor))
8888 flavor = RPC_AUTH_MAXFLAVOR;
8889
58a8cf12
WAA		 8890 if (flavor != RPC_AUTH_MAXFLAVOR) {
8891 err = nfs4_lookup_root_sec(server, fhandle,
8892 info, flavor);
8893 if (!err)
8894 break;
8895 }
8896 }
8897
8898 if (flavor == RPC_AUTH_MAXFLAVOR)
8899 err = -EPERM;
fca78d6d
BS		 8900
8901out_freepage:
8902 put_page(page);
8903 if (err == -EACCES)
8904 return -EPERM;
8905out:
8906 return err;
8907}
1cab0652 8908
ab7cb0df
TM		 8909static int _nfs41_test_stateid(struct nfs_server *server,
8910 nfs4_stateid *stateid,
8911 struct rpc_cred *cred)
7d974794
BS		 8912{
8913 int status;
8914 struct nfs41_test_stateid_args args = {
1cab0652 8915 .stateid = stateid,
7d974794
BS		 8916 };
8917 struct nfs41_test_stateid_res res;
8918 struct rpc_message msg = {
8919 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
8920 .rpc_argp = &args,
8921 .rpc_resp = &res,
ab7cb0df 8922 .rpc_cred = cred,
7d974794 8923 };
3787d506
WAA		 8924 struct rpc_clnt *rpc_client = server->client;
8925
8926 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8927 &rpc_client, &msg);
1cab0652 8928
38527b15 8929 dprintk("NFS call test_stateid %p\n", stateid);
a9c92d6b 8930 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 8931 nfs4_set_sequence_privileged(&args.seq_args);
3787d506 8932 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8fe72bac 8933 &args.seq_args, &res.seq_res);
38527b15
CL		 8934 if (status != NFS_OK) {
8935 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 8936 return status;
38527b15
CL		 8937 }
8938 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 8939 return -res.status;
7d974794
BS		 8940}
8941
43912bbb
TM		 8942static void nfs4_handle_delay_or_session_error(struct nfs_server *server,
8943 int err, struct nfs4_exception *exception)
8944{
8945 exception->retry = 0;
8946 switch(err) {
8947 case -NFS4ERR_DELAY:
76e8a1bd 8948 case -NFS4ERR_RETRY_UNCACHED_REP:
43912bbb
TM		 8949 nfs4_handle_exception(server, err, exception);
8950 break;
8951 case -NFS4ERR_BADSESSION:
8952 case -NFS4ERR_BADSLOT:
8953 case -NFS4ERR_BAD_HIGH_SLOT:
8954 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
8955 case -NFS4ERR_DEADSESSION:
8956 nfs4_do_handle_exception(server, err, exception);
8957 }
8958}
8959
38527b15
CL		 8960/**
8961 * nfs41_test_stateid - perform a TEST_STATEID operation
8962 *
8963 * @server: server / transport on which to perform the operation
8964 * @stateid: state ID to test
ab7cb0df 8965 * @cred: credential
38527b15
CL		 8966 *
8967 * Returns NFS_OK if the server recognizes that "stateid" is valid.
8968 * Otherwise a negative NFS4ERR value is returned if the operation
8969 * failed or the state ID is not currently valid.
8970 */
ab7cb0df
TM		 8971static int nfs41_test_stateid(struct nfs_server *server,
8972 nfs4_stateid *stateid,
8973 struct rpc_cred *cred)
7d974794
BS		 8974{
8975 struct nfs4_exception exception = { };
8976 int err;
8977 do {
ab7cb0df 8978 err = _nfs41_test_stateid(server, stateid, cred);
43912bbb 8979 nfs4_handle_delay_or_session_error(server, err, &exception);
7d974794
BS		 8980 } while (exception.retry);
8981 return err;
8982}
9aeda35f 8983
7c1d5fae
TM		 8984struct nfs_free_stateid_data {
8985 struct nfs_server *server;
8986 struct nfs41_free_stateid_args args;
9aeda35f 8987 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 8988};
8989
8990static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
8991{
8992 struct nfs_free_stateid_data *data = calldata;
7981c8a6 8993 nfs4_setup_sequence(data->server->nfs_client,
7c1d5fae
TM		 8994 &data->args.seq_args,
8995 &data->res.seq_res,
8996 task);
8997}
8998
8999static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
9000{
9001 struct nfs_free_stateid_data *data = calldata;
9002
9003 nfs41_sequence_done(task, &data->res.seq_res);
9004
9005 switch (task->tk_status) {
9006 case -NFS4ERR_DELAY:
8478eaa1 9007 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN)
7c1d5fae
TM		 9008 rpc_restart_call_prepare(task);
9009 }
9010}
9011
9012static void nfs41_free_stateid_release(void *calldata)
9013{
9014 kfree(calldata);
9015}
9016
17f26b12 9017static const struct rpc_call_ops nfs41_free_stateid_ops = {
7c1d5fae
TM		 9018 .rpc_call_prepare = nfs41_free_stateid_prepare,
9019 .rpc_call_done = nfs41_free_stateid_done,
9020 .rpc_release = nfs41_free_stateid_release,
9021};
9022
9023static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
f0b0bf88 9024 const nfs4_stateid *stateid,
ab7cb0df 9025 struct rpc_cred *cred,
7c1d5fae
TM		 9026 bool privileged)
9027{
9aeda35f
BS		 9028 struct rpc_message msg = {
9029 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 9030 .rpc_cred = cred,
9aeda35f 9031 };
7c1d5fae
TM		 9032 struct rpc_task_setup task_setup = {
9033 .rpc_client = server->client,
9034 .rpc_message = &msg,
9035 .callback_ops = &nfs41_free_stateid_ops,
9036 .flags = RPC_TASK_ASYNC,
9037 };
9038 struct nfs_free_stateid_data *data;
9aeda35f 9039
3787d506
WAA		 9040 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
9041 &task_setup.rpc_client, &msg);
9042
38527b15 9043 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 9044 data = kmalloc(sizeof(*data), GFP_NOFS);
9045 if (!data)
9046 return ERR_PTR(-ENOMEM);
9047 data->server = server;
9048 nfs4_stateid_copy(&data->args.stateid, stateid);
9049
9050 task_setup.callback_data = data;
9051
9052 msg.rpc_argp = &data->args;
9053 msg.rpc_resp = &data->res;
76e8a1bd 9054 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
7c1d5fae
TM		 9055 if (privileged)
9056 nfs4_set_sequence_privileged(&data->args.seq_args);
9057
9058 return rpc_run_task(&task_setup);
9aeda35f
BS		 9059}
9060
38527b15
CL		 9061/**
9062 * nfs41_free_stateid - perform a FREE_STATEID operation
9063 *
9064 * @server: server / transport on which to perform the operation
9065 * @stateid: state ID to release
ab7cb0df 9066 * @cred: credential
f0b0bf88 9067 * @is_recovery: set to true if this call needs to be privileged
38527b15 9068 *
f0b0bf88 9069 * Note: this function is always asynchronous.
38527b15 9070 */
ab7cb0df 9071static int nfs41_free_stateid(struct nfs_server *server,
f0b0bf88
TM		 9072 const nfs4_stateid *stateid,
9073 struct rpc_cred *cred,
9074 bool is_recovery)
9aeda35f 9075{
7c1d5fae 9076 struct rpc_task *task;
7c1d5fae 9077
f0b0bf88 9078 task = _nfs41_free_stateid(server, stateid, cred, is_recovery);
7c1d5fae
TM		 9079 if (IS_ERR(task))
9080 return PTR_ERR(task);
7c1d5fae 9081 rpc_put_task(task);
f0b0bf88 9082 return 0;
9aeda35f 9083}
36281caa 9084
f1cdae87
JL		 9085static void
9086nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
c8b2d0bf 9087{
ab7cb0df 9088 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 9089
f0b0bf88 9090 nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf 9091 nfs4_free_lock_state(server, lsp);
c8b2d0bf
TM		 9092}
9093
36281caa
TM		 9094static bool nfs41_match_stateid(const nfs4_stateid *s1,
9095 const nfs4_stateid *s2)
9096{
93b717fd
TM		 9097 if (s1->type != s2->type)
9098 return false;
9099
2d2f24ad 9100 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 9101 return false;
9102
2d2f24ad 9103 if (s1->seqid == s2->seqid)
36281caa 9104 return true;
36281caa 9105
045c5519 9106 return s1->seqid == 0 || s2->seqid == 0;
36281caa
TM		 9107}
9108
557134a3
AA		 9109#endif /* CONFIG_NFS_V4_1 */
9110
36281caa
TM		 9111static bool nfs4_match_stateid(const nfs4_stateid *s1,
9112 const nfs4_stateid *s2)
9113{
f597c537 9114 return nfs4_stateid_match(s1, s2);
36281caa
TM		 9115}
9116
9117
17280175 9118static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 9119 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 9120 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 9121 .recover_open = nfs4_open_reclaim,
9122 .recover_lock = nfs4_lock_reclaim,
591d71cb 9123 .establish_clid = nfs4_init_clientid,
05f4c350 9124 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 9125};
9126
591d71cb 9127#if defined(CONFIG_NFS_V4_1)
17280175 9128static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 9129 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
9130 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
9131 .recover_open = nfs4_open_reclaim,
9132 .recover_lock = nfs4_lock_reclaim,
4d643d1d 9133 .establish_clid = nfs41_init_clientid,
fce5c838 9134 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 9135 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 9136};
9137#endif /* CONFIG_NFS_V4_1 */
9138
17280175 9139static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 9140 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
9141 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
4dfd4f7a 9142 .recover_open = nfs40_open_expired,
591d71cb
AA		 9143 .recover_lock = nfs4_lock_expired,
9144 .establish_clid = nfs4_init_clientid,
9145};
9146
9147#if defined(CONFIG_NFS_V4_1)
17280175 9148static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 9149 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 9150 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 9151 .recover_open = nfs41_open_expired,
9152 .recover_lock = nfs41_lock_expired,
4d643d1d 9153 .establish_clid = nfs41_init_clientid,
1da177e4 9154};
591d71cb 9155#endif /* CONFIG_NFS_V4_1 */
1da177e4 9156
17280175 9157static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 9158 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 9159 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 9160 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 9161};
9162
9163#if defined(CONFIG_NFS_V4_1)
17280175 9164static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 9165 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 9166 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 9167 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 9168};
9169#endif
9170
ec011fe8 9171static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
b03d735b 9172 .get_locations = _nfs40_proc_get_locations,
44c99933 9173 .fsid_present = _nfs40_proc_fsid_present,
ec011fe8
CL		 9174};
9175
9176#if defined(CONFIG_NFS_V4_1)
9177static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
b03d735b 9178 .get_locations = _nfs41_proc_get_locations,
44c99933 9179 .fsid_present = _nfs41_proc_fsid_present,
ec011fe8
CL		 9180};
9181#endif /* CONFIG_NFS_V4_1 */
9182
97dc1359
TM		 9183static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
9184 .minor_version = 0,
39c6daae
TM		 9185 .init_caps = NFS_CAP_READDIRPLUS
9186 | NFS_CAP_ATOMIC_OPEN
39c6daae 9187 | NFS_CAP_POSIX_LOCK,
abf79bb3
CL		 9188 .init_client = nfs40_init_client,
9189 .shutdown_client = nfs40_shutdown_client,
36281caa 9190 .match_stateid = nfs4_match_stateid,
fca78d6d 9191 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 9192 .free_lock_state = nfs4_release_lockowner,
45870d69 9193 .test_and_free_expired = nfs40_test_and_free_expired_stateid,
63f5f796 9194 .alloc_seqid = nfs_alloc_seqid,
9915ea7e 9195 .call_sync_ops = &nfs40_call_sync_ops,
c48f4f35
TM		 9196 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
9197 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
9198 .state_renewal_ops = &nfs40_state_renewal_ops,
ec011fe8 9199 .mig_recovery_ops = &nfs40_mig_recovery_ops,
97dc1359
TM		 9200};
9201
9202#if defined(CONFIG_NFS_V4_1)
63f5f796
TM		 9203static struct nfs_seqid *
9204nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2)
9205{
9206 return NULL;
9207}
9208
97dc1359
TM		 9209static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
9210 .minor_version = 1,
39c6daae
TM		 9211 .init_caps = NFS_CAP_READDIRPLUS
9212 | NFS_CAP_ATOMIC_OPEN
3b66486c 9213 | NFS_CAP_POSIX_LOCK
49f9a0fa 9214 | NFS_CAP_STATEID_NFSV41
e983120e 9215 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 9216 .init_client = nfs41_init_client,
9217 .shutdown_client = nfs41_shutdown_client,
36281caa 9218 .match_stateid = nfs41_match_stateid,
fca78d6d 9219 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 9220 .free_lock_state = nfs41_free_lock_state,
45870d69 9221 .test_and_free_expired = nfs41_test_and_free_expired_stateid,
63f5f796 9222 .alloc_seqid = nfs_alloc_no_seqid,
04fa2c6b 9223 .session_trunk = nfs4_test_session_trunk,
9915ea7e 9224 .call_sync_ops = &nfs41_call_sync_ops,
c48f4f35
TM		 9225 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
9226 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
9227 .state_renewal_ops = &nfs41_state_renewal_ops,
ec011fe8 9228 .mig_recovery_ops = &nfs41_mig_recovery_ops,
97dc1359
TM		 9229};
9230#endif
9231
42c2c424
SD		 9232#if defined(CONFIG_NFS_V4_2)
9233static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
9234 .minor_version = 2,
7017310a
BS		 9235 .init_caps = NFS_CAP_READDIRPLUS
9236 | NFS_CAP_ATOMIC_OPEN
7017310a
BS		 9237 | NFS_CAP_POSIX_LOCK
9238 | NFS_CAP_STATEID_NFSV41
e983120e 9239 | NFS_CAP_ATOMIC_OPEN_V1
f4ac1674 9240 | NFS_CAP_ALLOCATE
2e72448b 9241 | NFS_CAP_COPY
624bd5b7 9242 | NFS_CAP_DEALLOCATE
6c5a0d89 9243 | NFS_CAP_SEEK
e5341f3a
PT		 9244 | NFS_CAP_LAYOUTSTATS
9245 | NFS_CAP_CLONE,
abf79bb3
CL		 9246 .init_client = nfs41_init_client,
9247 .shutdown_client = nfs41_shutdown_client,
42c2c424
SD		 9248 .match_stateid = nfs41_match_stateid,
9249 .find_root_sec = nfs41_find_root_sec,
7017310a 9250 .free_lock_state = nfs41_free_lock_state,
9915ea7e 9251 .call_sync_ops = &nfs41_call_sync_ops,
45870d69 9252 .test_and_free_expired = nfs41_test_and_free_expired_stateid,
63f5f796 9253 .alloc_seqid = nfs_alloc_no_seqid,
04fa2c6b 9254 .session_trunk = nfs4_test_session_trunk,
42c2c424
SD		 9255 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
9256 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
9257 .state_renewal_ops = &nfs41_state_renewal_ops,
18e3b739 9258 .mig_recovery_ops = &nfs41_mig_recovery_ops,
42c2c424
SD		 9259};
9260#endif
9261
97dc1359
TM		 9262const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
9263 [0] = &nfs_v4_0_minor_ops,
9264#if defined(CONFIG_NFS_V4_1)
9265 [1] = &nfs_v4_1_minor_ops,
9266#endif
42c2c424
SD		 9267#if defined(CONFIG_NFS_V4_2)
9268 [2] = &nfs_v4_2_minor_ops,
9269#endif
97dc1359
TM		 9270};
9271
13997823 9272static ssize_t nfs4_listxattr(struct dentry *dentry, char *list, size_t size)
c4803c49
AG		 9273{
9274 ssize_t error, error2;
9275
9276 error = generic_listxattr(dentry, list, size);
9277 if (error < 0)
9278 return error;
9279 if (list) {
9280 list += error;
9281 size -= error;
9282 }
9283
9284 error2 = nfs4_listxattr_nfs4_label(d_inode(dentry), list, size);
9285 if (error2 < 0)
9286 return error2;
9287 return error + error2;
9288}
9289
17f26b12 9290static const struct inode_operations nfs4_dir_inode_operations = {
73a79706
BS		 9291 .create = nfs_create,
9292 .lookup = nfs_lookup,
9293 .atomic_open = nfs_atomic_open,
9294 .link = nfs_link,
9295 .unlink = nfs_unlink,
9296 .symlink = nfs_symlink,
9297 .mkdir = nfs_mkdir,
9298 .rmdir = nfs_rmdir,
9299 .mknod = nfs_mknod,
9300 .rename = nfs_rename,
9301 .permission = nfs_permission,
9302 .getattr = nfs_getattr,
9303 .setattr = nfs_setattr,
c4803c49 9304 .listxattr = nfs4_listxattr,
73a79706
BS		 9305};
9306
92e1d5be 9307static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 9308 .permission = nfs_permission,
9309 .getattr = nfs_getattr,
9310 .setattr = nfs_setattr,
c4803c49 9311 .listxattr = nfs4_listxattr,
6b3b5496
BF		 9312};
9313
509de811 9314const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 9315 .version = 4, /* protocol version */
9316 .dentry_ops = &nfs4_dentry_operations,
9317 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 9318 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 9319 .file_ops = &nfs4_file_operations,
1da177e4 9320 .getroot = nfs4_proc_get_root,
281cad46 9321 .submount = nfs4_submount,
ff9099f2 9322 .try_mount = nfs4_try_mount,
1da177e4
LT		 9323 .getattr = nfs4_proc_getattr,
9324 .setattr = nfs4_proc_setattr,
9325 .lookup = nfs4_proc_lookup,
9326 .access = nfs4_proc_access,
9327 .readlink = nfs4_proc_readlink,
1da177e4
LT		 9328 .create = nfs4_proc_create,
9329 .remove = nfs4_proc_remove,
9330 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 9331 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4 9332 .unlink_done = nfs4_proc_unlink_done,
d3d4152a 9333 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 9334 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 9335 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 9336 .link = nfs4_proc_link,
9337 .symlink = nfs4_proc_symlink,
9338 .mkdir = nfs4_proc_mkdir,
9339 .rmdir = nfs4_proc_remove,
9340 .readdir = nfs4_proc_readdir,
9341 .mknod = nfs4_proc_mknod,
9342 .statfs = nfs4_proc_statfs,
9343 .fsinfo = nfs4_proc_fsinfo,
9344 .pathconf = nfs4_proc_pathconf,
e9326dca 9345 .set_capabilities = nfs4_server_capabilities,
1da177e4 9346 .decode_dirent = nfs4_decode_dirent,
a4cdda59 9347 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
1da177e4 9348 .read_setup = nfs4_proc_read_setup,
ec06c096 9349 .read_done = nfs4_read_done,
1da177e4 9350 .write_setup = nfs4_proc_write_setup,
788e7a89 9351 .write_done = nfs4_write_done,
1da177e4 9352 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 9353 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 9354 .commit_done = nfs4_commit_done,
1da177e4 9355 .lock = nfs4_proc_lock,
e50a1c2e 9356 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 9357 .close_context = nfs4_close_context,
2b484297 9358 .open_context = nfs4_atomic_open,
011e2a7f 9359 .have_delegation = nfs4_have_delegation,
57ec14c5 9360 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 9361 .alloc_client = nfs4_alloc_client,
45a52a02 9362 .init_client = nfs4_init_client,
cdb7eced 9363 .free_client = nfs4_free_client,
1179acc6
BS		 9364 .create_server = nfs4_create_server,
9365 .clone_server = nfs_clone_server,
1da177e4
LT		 9366};
9367
64c2ce8b 9368static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
98e9cb57 9369 .name = XATTR_NAME_NFSV4_ACL,
64c2ce8b
AK		 9370 .list = nfs4_xattr_list_nfs4_acl,
9371 .get = nfs4_xattr_get_nfs4_acl,
9372 .set = nfs4_xattr_set_nfs4_acl,
9373};
9374
9375const struct xattr_handler *nfs4_xattr_handlers[] = {
9376 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 9377#ifdef CONFIG_NFS_V4_SECURITY_LABEL
9378 &nfs4_xattr_nfs4_label_handler,
9379#endif
64c2ce8b
AK		 9380 NULL
9381};
9382
1da177e4
LT		 9383/*
9384 * Local variables:
9385 * c-basic-offset: 8
9386 * End:
9387 */
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