]> git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blame - fs/nfs/nfs4proc.c
projects / mirror_ubuntu-artful-kernel.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
Merge tag 'spi-v4.11' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi
[mirror_ubuntu-artful-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;
580
581 if (flavor == RPC_AUTH_GSS_KRB5I ||
582 flavor == RPC_AUTH_GSS_KRB5P)
583 return true;
584
585 return false;
586}
65de872e 587
452e9352 588static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 589{
1da177e4
LT		 590 spin_lock(&clp->cl_lock);
591 if (time_before(clp->cl_last_renewal,timestamp))
592 clp->cl_last_renewal = timestamp;
593 spin_unlock(&clp->cl_lock);
594}
595
452e9352
TM		 596static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
597{
be824167
TM		 598 struct nfs_client *clp = server->nfs_client;
599
600 if (!nfs4_has_session(clp))
601 do_renew_lease(clp, timestamp);
452e9352
TM		 602}
603
2a3eb2b9
CL		 604struct nfs4_call_sync_data {
605 const struct nfs_server *seq_server;
606 struct nfs4_sequence_args *seq_args;
607 struct nfs4_sequence_res *seq_res;
608};
609
be3a5d23
TM		 610void nfs4_init_sequence(struct nfs4_sequence_args *args,
611 struct nfs4_sequence_res *res, int cache_reply)
a9c92d6b
CL		 612{
613 args->sa_slot = NULL;
614 args->sa_cache_this = cache_reply;
615 args->sa_privileged = 0;
616
617 res->sr_slot = NULL;
618}
619
620static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
621{
622 args->sa_privileged = 1;
623}
624
cb04ad2a
PT		 625int nfs40_setup_sequence(struct nfs4_slot_table *tbl,
626 struct nfs4_sequence_args *args,
627 struct nfs4_sequence_res *res,
628 struct rpc_task *task)
3bd2384a 629{
3bd2384a
CL		 630 struct nfs4_slot *slot;
631
632 /* slot already allocated? */
633 if (res->sr_slot != NULL)
634 goto out_start;
635
636 spin_lock(&tbl->slot_tbl_lock);
637 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
638 goto out_sleep;
639
640 slot = nfs4_alloc_slot(tbl);
641 if (IS_ERR(slot)) {
642 if (slot == ERR_PTR(-ENOMEM))
643 task->tk_timeout = HZ >> 2;
644 goto out_sleep;
645 }
646 spin_unlock(&tbl->slot_tbl_lock);
647
0a014a44 648 slot->privileged = args->sa_privileged ? 1 : 0;
3bd2384a
CL		 649 args->sa_slot = slot;
650 res->sr_slot = slot;
651
652out_start:
653 rpc_call_start(task);
654 return 0;
655
656out_sleep:
657 if (args->sa_privileged)
658 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
659 NULL, RPC_PRIORITY_PRIVILEGED);
660 else
661 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
662 spin_unlock(&tbl->slot_tbl_lock);
663 return -EAGAIN;
664}
cb04ad2a 665EXPORT_SYMBOL_GPL(nfs40_setup_sequence);
3bd2384a 666
2e80dbe7 667static void nfs40_sequence_free_slot(struct nfs4_sequence_res *res)
3bd2384a
CL		 668{
669 struct nfs4_slot *slot = res->sr_slot;
670 struct nfs4_slot_table *tbl;
671
3bd2384a
CL		 672 tbl = slot->table;
673 spin_lock(&tbl->slot_tbl_lock);
674 if (!nfs41_wake_and_assign_slot(tbl, slot))
675 nfs4_free_slot(tbl, slot);
676 spin_unlock(&tbl->slot_tbl_lock);
677
678 res->sr_slot = NULL;
2e80dbe7
TM		 679}
680
681static int nfs40_sequence_done(struct rpc_task *task,
682 struct nfs4_sequence_res *res)
683{
684 if (res->sr_slot != NULL)
685 nfs40_sequence_free_slot(res);
3bd2384a
CL		 686 return 1;
687}
688
cccef3b9
AA		 689#if defined(CONFIG_NFS_V4_1)
690
d185a334 691static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871 692{
e3725ec0 693 struct nfs4_session *session;
13615871 694 struct nfs4_slot_table *tbl;
a13ce7c6 695 struct nfs4_slot *slot = res->sr_slot;
c10e4498 696 bool send_new_highest_used_slotid = false;
13615871 697
a13ce7c6 698 tbl = slot->table;
e3725ec0 699 session = tbl->session;
ea028ac9 700
07e8dcbd
TM		 701 /* Bump the slot sequence number */
702 if (slot->seq_done)
703 slot->seq_nr++;
704 slot->seq_done = 0;
705
35dc1d74 706 spin_lock(&tbl->slot_tbl_lock);
c10e4498
TM		 707 /* Be nice to the server: try to ensure that the last transmitted
708 * value for highest_user_slotid <= target_highest_slotid
709 */
710 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
711 send_new_highest_used_slotid = true;
712
a13ce7c6 713 if (nfs41_wake_and_assign_slot(tbl, slot)) {
b75ad4cd
TM		 714 send_new_highest_used_slotid = false;
715 goto out_unlock;
716 }
a13ce7c6 717 nfs4_free_slot(tbl, slot);
c10e4498
TM		 718
719 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
720 send_new_highest_used_slotid = false;
b75ad4cd 721out_unlock:
35dc1d74 722 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 723 res->sr_slot = NULL;
c10e4498 724 if (send_new_highest_used_slotid)
3f10a6af 725 nfs41_notify_server(session->clp);
045d2a6d
TM		 726 if (waitqueue_active(&tbl->slot_waitq))
727 wake_up_all(&tbl->slot_waitq);
13615871
AA		 728}
729
2e80dbe7
TM		 730static int nfs41_sequence_process(struct rpc_task *task,
731 struct nfs4_sequence_res *res)
b0df806c 732{
e3725ec0 733 struct nfs4_session *session;
a13ce7c6 734 struct nfs4_slot *slot = res->sr_slot;
14516c3a 735 struct nfs_client *clp;
ac20d163 736 bool interrupted = false;
85563073 737 int ret = 1;
b0df806c 738
a13ce7c6
TM		 739 if (slot == NULL)
740 goto out_noaction;
468f8613
BS		 741 /* don't increment the sequence number if the task wasn't sent */
742 if (!RPC_WAS_SENT(task))
b0df806c
AA		 743 goto out;
744
e3725ec0 745 session = slot->table->session;
933602e3 746
ac20d163
TM		 747 if (slot->interrupted) {
748 slot->interrupted = 0;
749 interrupted = true;
750 }
751
2f92ae34 752 trace_nfs4_sequence_done(session, res);
691daf3b 753 /* Check the SEQUENCE operation status */
14516c3a
TM		 754 switch (res->sr_status) {
755 case 0:
a865880e
OK		 756 /* If previous op on slot was interrupted and we reused
757 * the seq# and got a reply from the cache, then retry
758 */
759 if (task->tk_status == -EREMOTEIO && interrupted) {
760 ++slot->seq_nr;
761 goto retry_nowait;
762 }
b0df806c 763 /* Update the slot's sequence and clientid lease timer */
07e8dcbd 764 slot->seq_done = 1;
e3725ec0 765 clp = session->clp;
8e63b6a8 766 do_renew_lease(clp, res->sr_timestamp);
0629e370 767 /* Check sequence flags */
0a014a44
TM		 768 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags,
769 !!slot->privileged);
464ee9f9 770 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a 771 break;
ac20d163
TM		 772 case 1:
773 /*
774 * sr_status remains 1 if an RPC level error occurred.
775 * The server may or may not have processed the sequence
776 * operation..
777 * Mark the slot as having hosted an interrupted RPC call.
778 */
779 slot->interrupted = 1;
780 goto out;
14516c3a
TM		 781 case -NFS4ERR_DELAY:
782 /* The server detected a resend of the RPC call and
783 * returned NFS4ERR_DELAY as per Section 2.10.6.2
784 * of RFC5661.
785 */
df2fabff 786 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 787 __func__,
df2fabff 788 slot->slot_nr,
933602e3 789 slot->seq_nr);
14516c3a 790 goto out_retry;
85563073
TM		 791 case -NFS4ERR_BADSLOT:
792 /*
793 * The slot id we used was probably retired. Try again
794 * using a different slot id.
795 */
e8794440
TM		 796 goto retry_nowait;
797 case -NFS4ERR_SEQ_MISORDERED:
ac20d163
TM		 798 /*
799 * Was the last operation on this sequence interrupted?
800 * If so, retry after bumping the sequence number.
801 */
802 if (interrupted) {
803 ++slot->seq_nr;
804 goto retry_nowait;
805 }
e8794440
TM		 806 /*
807 * Could this slot have been previously retired?
808 * If so, then the server may be expecting seq_nr = 1!
809 */
8e63b6a8
TM		 810 if (slot->seq_nr != 1) {
811 slot->seq_nr = 1;
812 goto retry_nowait;
813 }
814 break;
e8794440
TM		 815 case -NFS4ERR_SEQ_FALSE_RETRY:
816 ++slot->seq_nr;
817 goto retry_nowait;
2cf10cdd
TM		 818 case -NFS4ERR_DEADSESSION:
819 case -NFS4ERR_BADSESSION:
820 nfs4_schedule_session_recovery(session, res->sr_status);
821 goto retry_nowait;
14516c3a
TM		 822 default:
823 /* Just update the slot sequence no. */
07e8dcbd 824 slot->seq_done = 1;
b0df806c
AA		 825 }
826out:
827 /* The session may be reset by one of the error handlers. */
828 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
a13ce7c6 829out_noaction:
85563073 830 return ret;
e8794440
TM		 831retry_nowait:
832 if (rpc_restart_call_prepare(task)) {
2e80dbe7 833 nfs41_sequence_free_slot(res);
e8794440
TM		 834 task->tk_status = 0;
835 ret = 0;
836 }
837 goto out;
14516c3a 838out_retry:
d05dd4e9 839 if (!rpc_restart_call(task))
14516c3a
TM		 840 goto out;
841 rpc_delay(task, NFS4_POLL_RETRY_MAX);
842 return 0;
b0df806c 843}
2e80dbe7
TM		 844
845int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
846{
847 if (!nfs41_sequence_process(task, res))
848 return 0;
849 if (res->sr_slot != NULL)
850 nfs41_sequence_free_slot(res);
851 return 1;
852
853}
f9c96fcc 854EXPORT_SYMBOL_GPL(nfs41_sequence_done);
b0df806c 855
2e80dbe7
TM		 856static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res)
857{
858 if (res->sr_slot == NULL)
859 return 1;
860 if (res->sr_slot->table->session != NULL)
861 return nfs41_sequence_process(task, res);
862 return nfs40_sequence_done(task, res);
863}
864
865static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res)
866{
867 if (res->sr_slot != NULL) {
868 if (res->sr_slot->table->session != NULL)
869 nfs41_sequence_free_slot(res);
870 else
871 nfs40_sequence_free_slot(res);
872 }
873}
874
2c4b131d 875int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
df896455 876{
e3725ec0 877 if (res->sr_slot == NULL)
14516c3a 878 return 1;
3bd2384a
CL		 879 if (!res->sr_slot->table->session)
880 return nfs40_sequence_done(task, res);
14516c3a 881 return nfs41_sequence_done(task, res);
df896455 882}
2c4b131d 883EXPORT_SYMBOL_GPL(nfs4_sequence_done);
df896455 884
dc70d7b3 885int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 886 struct nfs4_sequence_args *args,
887 struct nfs4_sequence_res *res,
ce5039c1
AA		 888 struct rpc_task *task)
889{
fbcd4abc
AA		 890 struct nfs4_slot *slot;
891 struct nfs4_slot_table *tbl;
fbcd4abc
AA		 892
893 dprintk("--> %s\n", __func__);
ce5039c1 894 /* slot already allocated? */
dfb4f309 895 if (res->sr_slot != NULL)
d9afbd1b 896 goto out_success;
ce5039c1 897
fbcd4abc
AA		 898 tbl = &session->fc_slot_table;
899
69d206b5
TM		 900 task->tk_timeout = 0;
901
fbcd4abc 902 spin_lock(&tbl->slot_tbl_lock);
774d5f14 903 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) &&
8fe72bac 904 !args->sa_privileged) {
0b1c8fc4 905 /* The state manager will wait until the slot table is empty */
0b1c8fc4 906 dprintk("%s session is draining\n", __func__);
7b939a3f 907 goto out_sleep;
689cf5c1
AB		 908 }
909
2dc03b7f 910 slot = nfs4_alloc_slot(tbl);
69d206b5
TM		 911 if (IS_ERR(slot)) {
912 /* If out of memory, try again in 1/4 second */
913 if (slot == ERR_PTR(-ENOMEM))
914 task->tk_timeout = HZ >> 2;
fbcd4abc 915 dprintk("<-- %s: no free slots\n", __func__);
7b939a3f 916 goto out_sleep;
fbcd4abc
AA		 917 }
918 spin_unlock(&tbl->slot_tbl_lock);
919
0a014a44 920 slot->privileged = args->sa_privileged ? 1 : 0;
2b2fa717 921 args->sa_slot = slot;
fbcd4abc 922
e8d92382 923 dprintk("<-- %s slotid=%u seqid=%u\n", __func__,
2dc03b7f 924 slot->slot_nr, slot->seq_nr);
fbcd4abc 925
dfb4f309 926 res->sr_slot = slot;
8e63b6a8 927 res->sr_timestamp = jiffies;
2a6e26cd 928 res->sr_status_flags = 0;
fbcd4abc
AA		 929 /*
930 * sr_status is only set in decode_sequence, and so will remain
931 * set to 1 if an rpc level failure occurs.
932 */
933 res->sr_status = 1;
2f92ae34 934 trace_nfs4_setup_sequence(session, args);
d9afbd1b
TM		 935out_success:
936 rpc_call_start(task);
ce5039c1 937 return 0;
7b939a3f 938out_sleep:
8fe72bac
TM		 939 /* Privileged tasks are queued with top priority */
940 if (args->sa_privileged)
1e1093c7
TM		 941 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
942 NULL, RPC_PRIORITY_PRIVILEGED);
943 else
944 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
7b939a3f
TM		 945 spin_unlock(&tbl->slot_tbl_lock);
946 return -EAGAIN;
ce5039c1 947}
dc70d7b3 948EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 949
5a580e0a
CL		 950static int nfs4_setup_sequence(const struct nfs_server *server,
951 struct nfs4_sequence_args *args,
952 struct nfs4_sequence_res *res,
953 struct rpc_task *task)
ce5039c1 954{
035168ab 955 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 956 int ret = 0;
957
3bd2384a 958 if (!session)
cb04ad2a
PT		 959 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
960 args, res, task);
035168ab 961
e8d92382 962 dprintk("--> %s clp %p session %p sr_slot %u\n",
dfb4f309 963 __func__, session->clp, session, res->sr_slot ?
e8d92382 964 res->sr_slot->slot_nr : NFS4_NO_SLOT);
ce5039c1 965
9d12b216 966 ret = nfs41_setup_sequence(session, args, res, task);
3bd2384a 967
ce5039c1
AA		 968 dprintk("<-- %s status=%d\n", __func__, ret);
969 return ret;
970}
971
ce5039c1
AA		 972static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
973{
2a3eb2b9 974 struct nfs4_call_sync_data *data = calldata;
6ba7db34 975 struct nfs4_session *session = nfs4_get_session(data->seq_server);
ce5039c1 976
035168ab
TM		 977 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
978
d9afbd1b 979 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
ce5039c1
AA		 980}
981
69ab40c4
AA		 982static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
983{
2a3eb2b9 984 struct nfs4_call_sync_data *data = calldata;
69ab40c4 985
14516c3a 986 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 987}
988
17280175 989static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 990 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 991 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 992};
993
3bd2384a
CL		 994#else /* !CONFIG_NFS_V4_1 */
995
9915ea7e
CL		 996static int nfs4_setup_sequence(const struct nfs_server *server,
997 struct nfs4_sequence_args *args,
998 struct nfs4_sequence_res *res,
999 struct rpc_task *task)
1000{
cb04ad2a
PT		 1001 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
1002 args, res, task);
9915ea7e
CL		 1003}
1004
2e80dbe7
TM		 1005static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res)
1006{
1007 return nfs40_sequence_done(task, res);
1008}
1009
1010static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res)
1011{
1012 if (res->sr_slot != NULL)
1013 nfs40_sequence_free_slot(res);
1014}
1015
2c4b131d
PT		 1016int nfs4_sequence_done(struct rpc_task *task,
1017 struct nfs4_sequence_res *res)
9915ea7e 1018{
3bd2384a 1019 return nfs40_sequence_done(task, res);
9915ea7e 1020}
2c4b131d 1021EXPORT_SYMBOL_GPL(nfs4_sequence_done);
3bd2384a
CL		 1022
1023#endif /* !CONFIG_NFS_V4_1 */
9915ea7e
CL		 1024
1025static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
1026{
1027 struct nfs4_call_sync_data *data = calldata;
1028 nfs4_setup_sequence(data->seq_server,
1029 data->seq_args, data->seq_res, task);
1030}
1031
1032static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
1033{
1034 struct nfs4_call_sync_data *data = calldata;
1035 nfs4_sequence_done(task, data->seq_res);
1036}
1037
1038static const struct rpc_call_ops nfs40_call_sync_ops = {
1039 .rpc_call_prepare = nfs40_call_sync_prepare,
1040 .rpc_call_done = nfs40_call_sync_done,
1041};
1042
7c513058
BS		 1043static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
1044 struct nfs_server *server,
ce5039c1
AA		 1045 struct rpc_message *msg,
1046 struct nfs4_sequence_args *args,
8fe72bac 1047 struct nfs4_sequence_res *res)
ce5039c1
AA		 1048{
1049 int ret;
1050 struct rpc_task *task;
9915ea7e 1051 struct nfs_client *clp = server->nfs_client;
2a3eb2b9 1052 struct nfs4_call_sync_data data = {
035168ab 1053 .seq_server = server,
ce5039c1
AA		 1054 .seq_args = args,
1055 .seq_res = res,
ce5039c1
AA		 1056 };
1057 struct rpc_task_setup task_setup = {
7c513058 1058 .rpc_client = clnt,
ce5039c1 1059 .rpc_message = msg,
9915ea7e 1060 .callback_ops = clp->cl_mvops->call_sync_ops,
ce5039c1
AA		 1061 .callback_data = &data
1062 };
1063
ce5039c1
AA		 1064 task = rpc_run_task(&task_setup);
1065 if (IS_ERR(task))
1066 ret = PTR_ERR(task);
1067 else {
1068 ret = task->tk_status;
1069 rpc_put_task(task);
1070 }
1071 return ret;
1072}
1073
7c513058
BS		 1074int nfs4_call_sync(struct rpc_clnt *clnt,
1075 struct nfs_server *server,
e73b83f2
BS		 1076 struct rpc_message *msg,
1077 struct nfs4_sequence_args *args,
1078 struct nfs4_sequence_res *res,
1079 int cache_reply)
1080{
a9c92d6b 1081 nfs4_init_sequence(args, res, cache_reply);
9915ea7e 1082 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
e73b83f2 1083}
cccef3b9 1084
d3129ef6
TM		 1085static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo,
1086 unsigned long timestamp)
1da177e4 1087{
38478b24 1088 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 1089
38478b24 1090 spin_lock(&dir->i_lock);
359d7d1c 1091 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
e603a4c1
TM		 1092 if (cinfo->atomic && cinfo->before == dir->i_version) {
1093 nfsi->cache_validity &= ~NFS_INO_REVAL_PAGECACHE;
1094 nfsi->attrtimeo_timestamp = jiffies;
1095 } else {
bfc69a45 1096 nfs_force_lookup_revalidate(dir);
e603a4c1
TM		 1097 if (cinfo->before != dir->i_version)
1098 nfsi->cache_validity |= NFS_INO_INVALID_ACCESS |
1099 NFS_INO_INVALID_ACL;
1100 }
a9a4a87a 1101 dir->i_version = cinfo->after;
d3129ef6 1102 nfsi->read_cache_jiffies = timestamp;
3235b403 1103 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
de242c0b 1104 nfs_fscache_invalidate(dir);
38478b24 1105 spin_unlock(&dir->i_lock);
1da177e4
LT		 1106}
1107
e56e0b78 1108struct nfs4_opendata {
c6d00e63 1109 struct kref kref;
e56e0b78
TM		 1110 struct nfs_openargs o_arg;
1111 struct nfs_openres o_res;
cdd4e68b
TM		 1112 struct nfs_open_confirmargs c_arg;
1113 struct nfs_open_confirmres c_res;
6926afd1
TM		 1114 struct nfs4_string owner_name;
1115 struct nfs4_string group_name;
a49c2691 1116 struct nfs4_label *a_label;
e56e0b78 1117 struct nfs_fattr f_attr;
1775fd3e 1118 struct nfs4_label *f_label;
e56e0b78 1119 struct dentry *dir;
82a2c1b7 1120 struct dentry *dentry;
e56e0b78 1121 struct nfs4_state_owner *owner;
aac00a8d 1122 struct nfs4_state *state;
e56e0b78 1123 struct iattr attrs;
26e976a8 1124 unsigned long timestamp;
3e309914 1125 unsigned int rpc_done : 1;
5bc2afc2 1126 unsigned int file_created : 1;
bdeca1b7 1127 unsigned int is_recover : 1;
24ac23ab
TM		 1128 int rpc_status;
1129 int cancelled;
e56e0b78
TM		 1130};
1131
49f9a0fa
TM		 1132static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
1133 int err, struct nfs4_exception *exception)
1134{
1135 if (err != -EINVAL)
1136 return false;
1137 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1138 return false;
1139 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
1140 exception->retry = 1;
1141 return true;
1142}
1143
6ae37339
TM		 1144static u32
1145nfs4_map_atomic_open_share(struct nfs_server *server,
1146 fmode_t fmode, int openflags)
1147{
1148 u32 res = 0;
1149
1150 switch (fmode & (FMODE_READ | FMODE_WRITE)) {
1151 case FMODE_READ:
1152 res = NFS4_SHARE_ACCESS_READ;
1153 break;
1154 case FMODE_WRITE:
1155 res = NFS4_SHARE_ACCESS_WRITE;
1156 break;
1157 case FMODE_READ|FMODE_WRITE:
1158 res = NFS4_SHARE_ACCESS_BOTH;
1159 }
1160 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1161 goto out;
1162 /* Want no delegation if we're using O_DIRECT */
1163 if (openflags & O_DIRECT)
1164 res |= NFS4_SHARE_WANT_NO_DELEG;
1165out:
1166 return res;
1167}
1168
49f9a0fa
TM		 1169static enum open_claim_type4
1170nfs4_map_atomic_open_claim(struct nfs_server *server,
1171 enum open_claim_type4 claim)
1172{
1173 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
1174 return claim;
1175 switch (claim) {
1176 default:
1177 return claim;
1178 case NFS4_OPEN_CLAIM_FH:
1179 return NFS4_OPEN_CLAIM_NULL;
1180 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1181 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
1182 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1183 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
1184 }
1185}
2ced46c2
TM		 1186
1187static void nfs4_init_opendata_res(struct nfs4_opendata *p)
1188{
1189 p->o_res.f_attr = &p->f_attr;
1775fd3e 1190 p->o_res.f_label = p->f_label;
c1d51931
TM		 1191 p->o_res.seqid = p->o_arg.seqid;
1192 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 1193 p->o_res.server = p->o_arg.server;
5f657530 1194 p->o_res.access_request = p->o_arg.access;
2ced46c2 1195 nfs_fattr_init(&p->f_attr);
6926afd1 1196 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 1197}
1198
82a2c1b7 1199static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 1200 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be 1201 const struct iattr *attrs,
1775fd3e 1202 struct nfs4_label *label,
4a1c0893 1203 enum open_claim_type4 claim,
8535b2be 1204 gfp_t gfp_mask)
e56e0b78 1205{
82a2c1b7 1206 struct dentry *parent = dget_parent(dentry);
2b0143b5 1207 struct inode *dir = d_inode(parent);
e56e0b78 1208 struct nfs_server *server = NFS_SERVER(dir);
63f5f796 1209 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
e56e0b78
TM		 1210 struct nfs4_opendata *p;
1211
8535b2be 1212 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 1213 if (p == NULL)
1214 goto err;
14c43f76
DQ		 1215
1216 p->f_label = nfs4_label_alloc(server, gfp_mask);
1217 if (IS_ERR(p->f_label))
1218 goto err_free_p;
1219
a49c2691
KM		 1220 p->a_label = nfs4_label_alloc(server, gfp_mask);
1221 if (IS_ERR(p->a_label))
1222 goto err_free_f;
1223
63f5f796
TM		 1224 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
1225 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask);
badc76dd 1226 if (IS_ERR(p->o_arg.seqid))
14c43f76 1227 goto err_free_label;
82a2c1b7
AV		 1228 nfs_sb_active(dentry->d_sb);
1229 p->dentry = dget(dentry);
e56e0b78
TM		 1230 p->dir = parent;
1231 p->owner = sp;
1232 atomic_inc(&sp->so_count);
dc0b027d
TM		 1233 p->o_arg.open_flags = flags;
1234 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
dff25ddb 1235 p->o_arg.umask = current_umask();
536585cc 1236 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
6ae37339
TM		 1237 p->o_arg.share_access = nfs4_map_atomic_open_share(server,
1238 fmode, flags);
ae2bb032
WAA		 1239 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
1240 * will return permission denied for all bits until close */
1241 if (!(flags & O_EXCL)) {
1242 /* ask server to check for all possible rights as results
1243 * are cached */
536585cc
TM		 1244 switch (p->o_arg.claim) {
1245 default:
1246 break;
1247 case NFS4_OPEN_CLAIM_NULL:
1248 case NFS4_OPEN_CLAIM_FH:
1249 p->o_arg.access = NFS4_ACCESS_READ |
1250 NFS4_ACCESS_MODIFY |
1251 NFS4_ACCESS_EXTEND |
1252 NFS4_ACCESS_EXECUTE;
1253 }
ae2bb032 1254 }
7539bbab 1255 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 1256 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1257 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 1258 p->o_arg.name = &dentry->d_name;
e56e0b78 1259 p->o_arg.server = server;
aa9c2669 1260 p->o_arg.bitmask = nfs4_bitmask(server, label);
1549210f 1261 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
a49c2691 1262 p->o_arg.label = nfs4_label_copy(p->a_label, label);
49f9a0fa 1263 switch (p->o_arg.claim) {
4a1c0893
TM		 1264 case NFS4_OPEN_CLAIM_NULL:
1265 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1266 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1267 p->o_arg.fh = NFS_FH(dir);
1268 break;
1269 case NFS4_OPEN_CLAIM_PREVIOUS:
1270 case NFS4_OPEN_CLAIM_FH:
1271 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1272 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
2b0143b5 1273 p->o_arg.fh = NFS_FH(d_inode(dentry));
4a1c0893 1274 }
536e43d1 1275 if (attrs != NULL && attrs->ia_valid != 0) {
c281fa9c 1276 __u32 verf[2];
d77d76ff 1277
e56e0b78
TM		 1278 p->o_arg.u.attrs = &p->attrs;
1279 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 1280
1281 verf[0] = jiffies;
1282 verf[1] = current->pid;
1283 memcpy(p->o_arg.u.verifier.data, verf,
1284 sizeof(p->o_arg.u.verifier.data));
e56e0b78 1285 }
cdd4e68b
TM		 1286 p->c_arg.fh = &p->o_res.fh;
1287 p->c_arg.stateid = &p->o_res.stateid;
1288 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 1289 nfs4_init_opendata_res(p);
c6d00e63 1290 kref_init(&p->kref);
e56e0b78 1291 return p;
14c43f76
DQ		 1292
1293err_free_label:
a49c2691
KM		 1294 nfs4_label_free(p->a_label);
1295err_free_f:
14c43f76
DQ		 1296 nfs4_label_free(p->f_label);
1297err_free_p:
e56e0b78
TM		 1298 kfree(p);
1299err:
1300 dput(parent);
1301 return NULL;
1302}
1303
c6d00e63 1304static void nfs4_opendata_free(struct kref *kref)
e56e0b78 1305{
c6d00e63
TM		 1306 struct nfs4_opendata *p = container_of(kref,
1307 struct nfs4_opendata, kref);
82a2c1b7 1308 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 1309
1310 nfs_free_seqid(p->o_arg.seqid);
2e80dbe7 1311 nfs4_sequence_free_slot(&p->o_res.seq_res);
aac00a8d
TM		 1312 if (p->state != NULL)
1313 nfs4_put_open_state(p->state);
c6d00e63 1314 nfs4_put_state_owner(p->owner);
14c43f76 1315
a49c2691 1316 nfs4_label_free(p->a_label);
14c43f76
DQ		 1317 nfs4_label_free(p->f_label);
1318
c6d00e63 1319 dput(p->dir);
82a2c1b7
AV		 1320 dput(p->dentry);
1321 nfs_sb_deactive(sb);
6926afd1 1322 nfs_fattr_free_names(&p->f_attr);
e911b815 1323 kfree(p->f_attr.mdsthreshold);
c6d00e63
TM		 1324 kfree(p);
1325}
1326
1327static void nfs4_opendata_put(struct nfs4_opendata *p)
1328{
1329 if (p != NULL)
1330 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 1331}
1332
06f814a3
TM		 1333static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
1334{
06f814a3
TM		 1335 int ret;
1336
06f814a3 1337 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 1338 return ret;
1339}
1340
24311f88
TM		 1341static bool nfs4_mode_match_open_stateid(struct nfs4_state *state,
1342 fmode_t fmode)
1343{
1344 switch(fmode & (FMODE_READ|FMODE_WRITE)) {
1345 case FMODE_READ|FMODE_WRITE:
1346 return state->n_rdwr != 0;
1347 case FMODE_WRITE:
1348 return state->n_wronly != 0;
1349 case FMODE_READ:
1350 return state->n_rdonly != 0;
1351 }
1352 WARN_ON_ONCE(1);
1353 return false;
1354}
1355
dc0b027d 1356static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 1357{
1358 int ret = 0;
dc0b027d 1359
536e43d1 1360 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 1361 goto out;
1362 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 1363 case FMODE_READ:
88069f77
TM		 1364 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1365 && state->n_rdonly != 0;
6ee41268
TM		 1366 break;
1367 case FMODE_WRITE:
88069f77
TM		 1368 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1369 && state->n_wronly != 0;
6ee41268
TM		 1370 break;
1371 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 1372 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1373 && state->n_rdwr != 0;
6ee41268 1374 }
dc0b027d 1375out:
6ee41268
TM		 1376 return ret;
1377}
1378
2a606188
TM		 1379static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode,
1380 enum open_claim_type4 claim)
aac00a8d 1381{
652f89f6
TM		 1382 if (delegation == NULL)
1383 return 0;
dc0b027d 1384 if ((delegation->type & fmode) != fmode)
aac00a8d 1385 return 0;
d25be546
TM		 1386 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1387 return 0;
2a606188
TM		 1388 switch (claim) {
1389 case NFS4_OPEN_CLAIM_NULL:
1390 case NFS4_OPEN_CLAIM_FH:
1391 break;
1392 case NFS4_OPEN_CLAIM_PREVIOUS:
1393 if (!test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
1394 break;
1395 default:
1396 return 0;
1397 }
b7391f44 1398 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 1399 return 1;
1400}
1401
dc0b027d 1402static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 1403{
dc0b027d 1404 switch (fmode) {
e7616923
TM		 1405 case FMODE_WRITE:
1406 state->n_wronly++;
1407 break;
1408 case FMODE_READ:
1409 state->n_rdonly++;
1410 break;
1411 case FMODE_READ|FMODE_WRITE:
1412 state->n_rdwr++;
1413 }
dc0b027d 1414 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 1415}
1416
8a64c4ef
TM		 1417#ifdef CONFIG_NFS_V4_1
1418static bool nfs_open_stateid_recover_openmode(struct nfs4_state *state)
1419{
1420 if (state->n_rdonly && !test_bit(NFS_O_RDONLY_STATE, &state->flags))
1421 return true;
1422 if (state->n_wronly && !test_bit(NFS_O_WRONLY_STATE, &state->flags))
1423 return true;
1424 if (state->n_rdwr && !test_bit(NFS_O_RDWR_STATE, &state->flags))
1425 return true;
1426 return false;
1427}
1428#endif /* CONFIG_NFS_V4_1 */
1429
4f14c194
TM		 1430static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
1431{
1432 struct nfs_client *clp = state->owner->so_server->nfs_client;
1433 bool need_recover = false;
1434
1435 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly)
1436 need_recover = true;
1437 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly)
1438 need_recover = true;
1439 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr)
1440 need_recover = true;
1441 if (need_recover)
1442 nfs4_state_mark_reclaim_nograce(clp, state);
1443}
1444
e999e80e 1445static bool nfs_need_update_open_stateid(struct nfs4_state *state,
1393d961 1446 const nfs4_stateid *stateid, nfs4_stateid *freeme)
e999e80e
TM		 1447{
1448 if (test_and_set_bit(NFS_OPEN_STATE, &state->flags) == 0)
1449 return true;
4f14c194 1450 if (!nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1393d961 1451 nfs4_stateid_copy(freeme, &state->open_stateid);
4f14c194 1452 nfs_test_and_clear_all_open_stateid(state);
e999e80e 1453 return true;
4f14c194 1454 }
e999e80e
TM		 1455 if (nfs4_stateid_is_newer(stateid, &state->open_stateid))
1456 return true;
1457 return false;
1458}
1459
f95549cf
TM		 1460static void nfs_resync_open_stateid_locked(struct nfs4_state *state)
1461{
3c38cbe2
TM		 1462 if (!(state->n_wronly || state->n_rdonly || state->n_rdwr))
1463 return;
f95549cf
TM		 1464 if (state->n_wronly)
1465 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1466 if (state->n_rdonly)
1467 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1468 if (state->n_rdwr)
1469 set_bit(NFS_O_RDWR_STATE, &state->flags);
3c38cbe2 1470 set_bit(NFS_OPEN_STATE, &state->flags);
f95549cf
TM		 1471}
1472
226056c5
TM		 1473static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
1474 nfs4_stateid *stateid, fmode_t fmode)
003707c7 1475{
226056c5
TM		 1476 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1477 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1478 case FMODE_WRITE:
1479 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1480 break;
1481 case FMODE_READ:
1482 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1483 break;
1484 case 0:
1485 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1486 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1487 clear_bit(NFS_OPEN_STATE, &state->flags);
1488 }
1489 if (stateid == NULL)
1490 return;
3e7dfb16
TM		 1491 /* Handle OPEN+OPEN_DOWNGRADE races */
1492 if (nfs4_stateid_match_other(stateid, &state->open_stateid) &&
1493 !nfs4_stateid_is_newer(stateid, &state->open_stateid)) {
f95549cf 1494 nfs_resync_open_stateid_locked(state);
226056c5 1495 return;
f95549cf 1496 }
003707c7 1497 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 1498 nfs4_stateid_copy(&state->stateid, stateid);
1499 nfs4_stateid_copy(&state->open_stateid, stateid);
226056c5
TM		 1500}
1501
4a1e2feb
TM		 1502static void nfs_clear_open_stateid(struct nfs4_state *state,
1503 nfs4_stateid *arg_stateid,
1504 nfs4_stateid *stateid, fmode_t fmode)
226056c5
TM		 1505{
1506 write_seqlock(&state->seqlock);
3e7dfb16
TM		 1507 /* Ignore, if the CLOSE argment doesn't match the current stateid */
1508 if (nfs4_state_match_open_stateid_other(state, arg_stateid))
1509 nfs_clear_open_stateid_locked(state, stateid, fmode);
226056c5 1510 write_sequnlock(&state->seqlock);
4f14c194
TM		 1511 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1512 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
226056c5
TM		 1513}
1514
1393d961
TM		 1515static void nfs_set_open_stateid_locked(struct nfs4_state *state,
1516 const nfs4_stateid *stateid, fmode_t fmode,
1517 nfs4_stateid *freeme)
003707c7 1518{
dc0b027d 1519 switch (fmode) {
003707c7
TM		 1520 case FMODE_READ:
1521 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1522 break;
1523 case FMODE_WRITE:
1524 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1525 break;
1526 case FMODE_READ|FMODE_WRITE:
1527 set_bit(NFS_O_RDWR_STATE, &state->flags);
1528 }
1393d961 1529 if (!nfs_need_update_open_stateid(state, stateid, freeme))
e999e80e
TM		 1530 return;
1531 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1532 nfs4_stateid_copy(&state->stateid, stateid);
1533 nfs4_stateid_copy(&state->open_stateid, stateid);
003707c7
TM		 1534}
1535
1393d961
TM		 1536static void __update_open_stateid(struct nfs4_state *state,
1537 const nfs4_stateid *open_stateid,
1538 const nfs4_stateid *deleg_stateid,
1539 fmode_t fmode,
1540 nfs4_stateid *freeme)
1da177e4 1541{
8bda4e4c
TM		 1542 /*
1543 * Protect the call to nfs4_state_set_mode_locked and
1544 * serialise the stateid update
1545 */
361cad3c 1546 spin_lock(&state->owner->so_lock);
8bda4e4c 1547 write_seqlock(&state->seqlock);
003707c7 1548 if (deleg_stateid != NULL) {
f597c537 1549 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1550 set_bit(NFS_DELEGATED_STATE, &state->flags);
1551 }
1552 if (open_stateid != NULL)
1393d961 1553 nfs_set_open_stateid_locked(state, open_stateid, fmode, freeme);
8bda4e4c 1554 write_sequnlock(&state->seqlock);
dc0b027d 1555 update_open_stateflags(state, fmode);
ec073428 1556 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1557}
1558
1393d961
TM		 1559static int update_open_stateid(struct nfs4_state *state,
1560 const nfs4_stateid *open_stateid,
1561 const nfs4_stateid *delegation,
1562 fmode_t fmode)
34310430 1563{
1393d961
TM		 1564 struct nfs_server *server = NFS_SERVER(state->inode);
1565 struct nfs_client *clp = server->nfs_client;
34310430
TM		 1566 struct nfs_inode *nfsi = NFS_I(state->inode);
1567 struct nfs_delegation *deleg_cur;
83aa3e0f 1568 nfs4_stateid freeme = { };
34310430
TM		 1569 int ret = 0;
1570
dc0b027d 1571 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1572
1573 rcu_read_lock();
1574 deleg_cur = rcu_dereference(nfsi->delegation);
1575 if (deleg_cur == NULL)
1576 goto no_delegation;
1577
1578 spin_lock(&deleg_cur->lock);
17f26b12 1579 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
d25be546 1580 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1581 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1582 goto no_delegation_unlock;
1583
1584 if (delegation == NULL)
1585 delegation = &deleg_cur->stateid;
f597c537 1586 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1587 goto no_delegation_unlock;
1588
b7391f44 1589 nfs_mark_delegation_referenced(deleg_cur);
1393d961
TM		 1590 __update_open_stateid(state, open_stateid, &deleg_cur->stateid,
1591 fmode, &freeme);
34310430
TM		 1592 ret = 1;
1593no_delegation_unlock:
1594 spin_unlock(&deleg_cur->lock);
1595no_delegation:
1596 rcu_read_unlock();
1597
1598 if (!ret && open_stateid != NULL) {
1393d961 1599 __update_open_stateid(state, open_stateid, NULL, fmode, &freeme);
34310430
TM		 1600 ret = 1;
1601 }
4f14c194 1602 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1393d961
TM		 1603 nfs4_schedule_state_manager(clp);
1604 if (freeme.type != 0)
1605 nfs4_test_and_free_stateid(server, &freeme,
1606 state->owner->so_cred);
34310430
TM		 1607
1608 return ret;
1609}
1610
39071e6f
TM		 1611static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp,
1612 const nfs4_stateid *stateid)
1613{
1614 struct nfs4_state *state = lsp->ls_state;
1615 bool ret = false;
1616
1617 spin_lock(&state->state_lock);
1618 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid))
1619 goto out_noupdate;
1620 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid))
1621 goto out_noupdate;
1622 nfs4_stateid_copy(&lsp->ls_stateid, stateid);
1623 ret = true;
1624out_noupdate:
1625 spin_unlock(&state->state_lock);
1626 return ret;
1627}
34310430 1628
dc0b027d 1629static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1630{
1631 struct nfs_delegation *delegation;
1632
1633 rcu_read_lock();
1634 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1635 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1636 rcu_read_unlock();
1637 return;
1638 }
1639 rcu_read_unlock();
57ec14c5 1640 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1641}
1642
6ee41268 1643static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1644{
1645 struct nfs4_state *state = opendata->state;
1646 struct nfs_inode *nfsi = NFS_I(state->inode);
1647 struct nfs_delegation *delegation;
f448badd 1648 int open_mode = opendata->o_arg.open_flags;
dc0b027d 1649 fmode_t fmode = opendata->o_arg.fmode;
2a606188 1650 enum open_claim_type4 claim = opendata->o_arg.claim;
aac00a8d
TM		 1651 nfs4_stateid stateid;
1652 int ret = -EAGAIN;
1653
aac00a8d 1654 for (;;) {
61beef75 1655 spin_lock(&state->owner->so_lock);
dc0b027d 1656 if (can_open_cached(state, fmode, open_mode)) {
61beef75 1657 update_open_stateflags(state, fmode);
6ee41268 1658 spin_unlock(&state->owner->so_lock);
61beef75 1659 goto out_return_state;
6ee41268 1660 }
61beef75 1661 spin_unlock(&state->owner->so_lock);
34310430
TM		 1662 rcu_read_lock();
1663 delegation = rcu_dereference(nfsi->delegation);
2a606188 1664 if (!can_open_delegated(delegation, fmode, claim)) {
34310430 1665 rcu_read_unlock();
aac00a8d 1666 break;
34310430 1667 }
aac00a8d 1668 /* Save the delegation */
f597c537 1669 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1670 rcu_read_unlock();
fa332941 1671 nfs_release_seqid(opendata->o_arg.seqid);
bdeca1b7
TM		 1672 if (!opendata->is_recover) {
1673 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1674 if (ret != 0)
1675 goto out;
1676 }
aac00a8d 1677 ret = -EAGAIN;
34310430
TM		 1678
1679 /* Try to update the stateid using the delegation */
dc0b027d 1680 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1681 goto out_return_state;
aac00a8d 1682 }
aac00a8d
TM		 1683out:
1684 return ERR_PTR(ret);
1685out_return_state:
1686 atomic_inc(&state->count);
1687 return state;
1688}
1689
e23008ec
AA		 1690static void
1691nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1692{
1693 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1694 struct nfs_delegation *delegation;
1695 int delegation_flags = 0;
1696
1697 rcu_read_lock();
1698 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1699 if (delegation)
1700 delegation_flags = delegation->flags;
1701 rcu_read_unlock();
72d79ff8
TM		 1702 switch (data->o_arg.claim) {
1703 default:
1704 break;
1705 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1706 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
e23008ec
AA		 1707 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1708 "returning a delegation for "
1709 "OPEN(CLAIM_DELEGATE_CUR)\n",
1710 clp->cl_hostname);
72d79ff8
TM		 1711 return;
1712 }
1713 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
e23008ec
AA		 1714 nfs_inode_set_delegation(state->inode,
1715 data->owner->so_cred,
1716 &data->o_res);
1717 else
1718 nfs_inode_reclaim_delegation(state->inode,
1719 data->owner->so_cred,
1720 &data->o_res);
1721}
1722
1723/*
1724 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1725 * and update the nfs4_state.
1726 */
1727static struct nfs4_state *
1728_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1729{
1730 struct inode *inode = data->state->inode;
1731 struct nfs4_state *state = data->state;
1732 int ret;
1733
d2bfda2e
WAA		 1734 if (!data->rpc_done) {
1735 if (data->rpc_status) {
1736 ret = data->rpc_status;
1737 goto err;
1738 }
1739 /* cached opens have already been processed */
1740 goto update;
e23008ec
AA		 1741 }
1742
e23008ec
AA		 1743 ret = nfs_refresh_inode(inode, &data->f_attr);
1744 if (ret)
1745 goto err;
1746
1747 if (data->o_res.delegation_type != 0)
1748 nfs4_opendata_check_deleg(data, state);
d2bfda2e 1749update:
e23008ec
AA		 1750 update_open_stateid(state, &data->o_res.stateid, NULL,
1751 data->o_arg.fmode);
d49f042a 1752 atomic_inc(&state->count);
e23008ec
AA		 1753
1754 return state;
1755err:
1756 return ERR_PTR(ret);
1757
1758}
1759
1760static struct nfs4_state *
1761_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1762{
1763 struct inode *inode;
1764 struct nfs4_state *state = NULL;
1b370bc2 1765 int ret;
24ac23ab 1766
aac00a8d 1767 if (!data->rpc_done) {
6ee41268 1768 state = nfs4_try_open_cached(data);
9759b0fb 1769 trace_nfs4_cached_open(data->state);
aac00a8d
TM		 1770 goto out;
1771 }
1772
1b370bc2 1773 ret = -EAGAIN;
24ac23ab 1774 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1775 goto err;
1775fd3e 1776 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1b370bc2 1777 ret = PTR_ERR(inode);
03f28e3a 1778 if (IS_ERR(inode))
1b370bc2
TM		 1779 goto err;
1780 ret = -ENOMEM;
24ac23ab
TM		 1781 state = nfs4_get_open_state(inode, data->owner);
1782 if (state == NULL)
1b370bc2 1783 goto err_put_inode;
e23008ec
AA		 1784 if (data->o_res.delegation_type != 0)
1785 nfs4_opendata_check_deleg(data, state);
34310430 1786 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1787 data->o_arg.fmode);
24ac23ab 1788 iput(inode);
aac00a8d 1789out:
7aa262b5 1790 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1791 return state;
1b370bc2
TM		 1792err_put_inode:
1793 iput(inode);
1794err:
1795 return ERR_PTR(ret);
24ac23ab
TM		 1796}
1797
e23008ec
AA		 1798static struct nfs4_state *
1799nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1800{
2e80dbe7
TM		 1801 struct nfs4_state *ret;
1802
e23008ec 1803 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
2e80dbe7
TM		 1804 ret =_nfs4_opendata_reclaim_to_nfs4_state(data);
1805 else
1806 ret = _nfs4_opendata_to_nfs4_state(data);
1807 nfs4_sequence_free_slot(&data->o_res.seq_res);
1808 return ret;
e23008ec
AA		 1809}
1810
864472e9
TM		 1811static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1812{
1813 struct nfs_inode *nfsi = NFS_I(state->inode);
1814 struct nfs_open_context *ctx;
1815
1816 spin_lock(&state->inode->i_lock);
1817 list_for_each_entry(ctx, &nfsi->open_files, list) {
1818 if (ctx->state != state)
1819 continue;
1820 get_nfs_open_context(ctx);
1821 spin_unlock(&state->inode->i_lock);
1822 return ctx;
1823 }
1824 spin_unlock(&state->inode->i_lock);
1825 return ERR_PTR(-ENOENT);
1826}
1827
4a1c0893
TM		 1828static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1829 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1830{
1831 struct nfs4_opendata *opendata;
1832
4a1c0893 1833 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1775fd3e 1834 NULL, NULL, claim, GFP_NOFS);
6f220ed5
TM		 1835 if (opendata == NULL)
1836 return ERR_PTR(-ENOMEM);
1837 opendata->state = state;
1838 atomic_inc(&state->count);
1839 return opendata;
1840}
1841
24311f88
TM		 1842static int nfs4_open_recover_helper(struct nfs4_opendata *opendata,
1843 fmode_t fmode)
864472e9 1844{
2ced46c2 1845 struct nfs4_state *newstate;
864472e9
TM		 1846 int ret;
1847
24311f88 1848 if (!nfs4_mode_match_open_stateid(opendata->state, fmode))
39f897fd 1849 return 0;
dc0b027d
TM		 1850 opendata->o_arg.open_flags = 0;
1851 opendata->o_arg.fmode = fmode;
be36e185
TM		 1852 opendata->o_arg.share_access = nfs4_map_atomic_open_share(
1853 NFS_SB(opendata->dentry->d_sb),
1854 fmode, 0);
2ced46c2
TM		 1855 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1856 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1857 nfs4_init_opendata_res(opendata);
b257957e 1858 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1859 if (ret != 0)
1860 return ret;
2ced46c2 1861 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1862 if (IS_ERR(newstate))
1863 return PTR_ERR(newstate);
24311f88
TM		 1864 if (newstate != opendata->state)
1865 ret = -ESTALE;
643168c2 1866 nfs4_close_state(newstate, fmode);
24311f88 1867 return ret;
864472e9
TM		 1868}
1869
1870static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1871{
864472e9
TM		 1872 int ret;
1873
4f14c194
TM		 1874 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */
1875 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1876 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1877 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
864472e9 1878 /* memory barrier prior to reading state->n_* */
2ced46c2 1879 clear_bit(NFS_DELEGATED_STATE, &state->flags);
fd068b20 1880 clear_bit(NFS_OPEN_STATE, &state->flags);
864472e9 1881 smp_rmb();
24311f88
TM		 1882 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
1883 if (ret != 0)
1884 return ret;
1885 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE);
1886 if (ret != 0)
1887 return ret;
1888 ret = nfs4_open_recover_helper(opendata, FMODE_READ);
1889 if (ret != 0)
1890 return ret;
1ac7e2fd
TM		 1891 /*
1892 * We may have performed cached opens for all three recoveries.
1893 * Check if we need to update the current stateid.
1894 */
1895 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1896 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1897 write_seqlock(&state->seqlock);
1ac7e2fd 1898 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1899 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1900 write_sequnlock(&state->seqlock);
1ac7e2fd 1901 }
864472e9
TM		 1902 return 0;
1903}
1904
1da177e4
LT		 1905/*
1906 * OPEN_RECLAIM:
1907 * reclaim state on the server after a reboot.
1da177e4 1908 */
539cd03a 1909static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1910{
1ac7e2fd 1911 struct nfs_delegation *delegation;
864472e9 1912 struct nfs4_opendata *opendata;
dc0b027d 1913 fmode_t delegation_type = 0;
1da177e4
LT		 1914 int status;
1915
4a1c0893
TM		 1916 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1917 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1918 if (IS_ERR(opendata))
1919 return PTR_ERR(opendata);
1ac7e2fd
TM		 1920 rcu_read_lock();
1921 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1922 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1923 delegation_type = delegation->type;
1ac7e2fd 1924 rcu_read_unlock();
864472e9
TM		 1925 opendata->o_arg.u.delegation_type = delegation_type;
1926 status = nfs4_open_recover(opendata, state);
c6d00e63 1927 nfs4_opendata_put(opendata);
1da177e4
LT		 1928 return status;
1929}
1930
539cd03a 1931static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1932{
1933 struct nfs_server *server = NFS_SERVER(state->inode);
1934 struct nfs4_exception exception = { };
1935 int err;
1936 do {
539cd03a 1937 err = _nfs4_do_open_reclaim(ctx, state);
42113a75 1938 trace_nfs4_open_reclaim(ctx, 0, err);
49f9a0fa
TM		 1939 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1940 continue;
168667c4 1941 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1942 break;
1943 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1944 } while (exception.retry);
1945 return err;
1946}
1947
864472e9
TM		 1948static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1949{
1950 struct nfs_open_context *ctx;
1951 int ret;
1952
1953 ctx = nfs4_state_find_open_context(state);
1954 if (IS_ERR(ctx))
91876b13 1955 return -EAGAIN;
539cd03a 1956 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1957 put_nfs_open_context(ctx);
1958 return ret;
1959}
1960
db4f2e63 1961static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1da177e4 1962{
be76b5b6
TM		 1963 switch (err) {
1964 default:
1965 printk(KERN_ERR "NFS: %s: unhandled error "
1966 "%d.\n", __func__, err);
1967 case 0:
1968 case -ENOENT:
8eee52af 1969 case -EAGAIN:
be76b5b6
TM		 1970 case -ESTALE:
1971 break;
1972 case -NFS4ERR_BADSESSION:
1973 case -NFS4ERR_BADSLOT:
1974 case -NFS4ERR_BAD_HIGH_SLOT:
1975 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1976 case -NFS4ERR_DEADSESSION:
1977 set_bit(NFS_DELEGATED_STATE, &state->flags);
1978 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1979 return -EAGAIN;
1980 case -NFS4ERR_STALE_CLIENTID:
1981 case -NFS4ERR_STALE_STATEID:
1982 set_bit(NFS_DELEGATED_STATE, &state->flags);
be76b5b6
TM		 1983 /* Don't recall a delegation if it was lost */
1984 nfs4_schedule_lease_recovery(server->nfs_client);
1985 return -EAGAIN;
352297b9
CL		 1986 case -NFS4ERR_MOVED:
1987 nfs4_schedule_migration_recovery(server);
1988 return -EAGAIN;
8ef2f8d4
CL		 1989 case -NFS4ERR_LEASE_MOVED:
1990 nfs4_schedule_lease_moved_recovery(server->nfs_client);
1991 return -EAGAIN;
be76b5b6
TM		 1992 case -NFS4ERR_DELEG_REVOKED:
1993 case -NFS4ERR_ADMIN_REVOKED:
404ea356 1994 case -NFS4ERR_EXPIRED:
be76b5b6 1995 case -NFS4ERR_BAD_STATEID:
db4f2e63 1996 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 1997 nfs_inode_find_state_and_recover(state->inode,
1998 stateid);
1999 nfs4_schedule_stateid_recovery(server, state);
869f9dfa 2000 return -EAGAIN;
be76b5b6
TM		 2001 case -NFS4ERR_DELAY:
2002 case -NFS4ERR_GRACE:
2003 set_bit(NFS_DELEGATED_STATE, &state->flags);
2004 ssleep(1);
2005 return -EAGAIN;
db4f2e63
TM		 2006 case -ENOMEM:
2007 case -NFS4ERR_DENIED:
2008 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
2009 return 0;
be76b5b6 2010 }
1da177e4
LT		 2011 return err;
2012}
2013
24311f88
TM		 2014int nfs4_open_delegation_recall(struct nfs_open_context *ctx,
2015 struct nfs4_state *state, const nfs4_stateid *stateid,
2016 fmode_t type)
db4f2e63
TM		 2017{
2018 struct nfs_server *server = NFS_SERVER(state->inode);
2019 struct nfs4_opendata *opendata;
24311f88 2020 int err = 0;
db4f2e63
TM		 2021
2022 opendata = nfs4_open_recoverdata_alloc(ctx, state,
2023 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
2024 if (IS_ERR(opendata))
2025 return PTR_ERR(opendata);
2026 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
5e99b532
JL		 2027 write_seqlock(&state->seqlock);
2028 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2029 write_sequnlock(&state->seqlock);
24311f88
TM		 2030 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2031 switch (type & (FMODE_READ|FMODE_WRITE)) {
2032 case FMODE_READ|FMODE_WRITE:
2033 case FMODE_WRITE:
2034 err = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
2035 if (err)
2036 break;
2037 err = nfs4_open_recover_helper(opendata, FMODE_WRITE);
2038 if (err)
2039 break;
2040 case FMODE_READ:
2041 err = nfs4_open_recover_helper(opendata, FMODE_READ);
2042 }
db4f2e63
TM		 2043 nfs4_opendata_put(opendata);
2044 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
2045}
2046
be05c860
CL		 2047static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
2048{
2049 struct nfs4_opendata *data = calldata;
2050
cb04ad2a
PT		 2051 nfs40_setup_sequence(data->o_arg.server->nfs_client->cl_slot_tbl,
2052 &data->c_arg.seq_args, &data->c_res.seq_res, task);
be05c860
CL		 2053}
2054
cdd4e68b
TM		 2055static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
2056{
2057 struct nfs4_opendata *data = calldata;
2058
17ead6c8 2059 nfs40_sequence_done(task, &data->c_res.seq_res);
be05c860 2060
cdd4e68b 2061 data->rpc_status = task->tk_status;
26e976a8 2062 if (data->rpc_status == 0) {
f597c537 2063 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 2064 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 2065 renew_lease(data->o_res.server, data->timestamp);
3e309914 2066 data->rpc_done = 1;
26e976a8 2067 }
cdd4e68b
TM		 2068}
2069
2070static void nfs4_open_confirm_release(void *calldata)
2071{
2072 struct nfs4_opendata *data = calldata;
2073 struct nfs4_state *state = NULL;
2074
2075 /* If this request hasn't been cancelled, do nothing */
2076 if (data->cancelled == 0)
2077 goto out_free;
2078 /* In case of error, no cleanup! */
3e309914 2079 if (!data->rpc_done)
cdd4e68b 2080 goto out_free;
cdd4e68b 2081 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 2082 if (!IS_ERR(state))
643168c2 2083 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 2084out_free:
c6d00e63 2085 nfs4_opendata_put(data);
cdd4e68b
TM		 2086}
2087
2088static const struct rpc_call_ops nfs4_open_confirm_ops = {
be05c860 2089 .rpc_call_prepare = nfs4_open_confirm_prepare,
cdd4e68b
TM		 2090 .rpc_call_done = nfs4_open_confirm_done,
2091 .rpc_release = nfs4_open_confirm_release,
2092};
2093
2094/*
2095 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
2096 */
2097static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
2098{
2b0143b5 2099 struct nfs_server *server = NFS_SERVER(d_inode(data->dir));
cdd4e68b 2100 struct rpc_task *task;
5138fde0
TM		 2101 struct rpc_message msg = {
2102 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
2103 .rpc_argp = &data->c_arg,
2104 .rpc_resp = &data->c_res,
2105 .rpc_cred = data->owner->so_cred,
2106 };
c970aa85
TM		 2107 struct rpc_task_setup task_setup_data = {
2108 .rpc_client = server->client,
5138fde0 2109 .rpc_message = &msg,
c970aa85
TM		 2110 .callback_ops = &nfs4_open_confirm_ops,
2111 .callback_data = data,
101070ca 2112 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2113 .flags = RPC_TASK_ASYNC,
2114 };
1da177e4
LT		 2115 int status;
2116
17ead6c8 2117 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1);
c6d00e63 2118 kref_get(&data->kref);
3e309914
TM		 2119 data->rpc_done = 0;
2120 data->rpc_status = 0;
5138fde0 2121 data->timestamp = jiffies;
e92c1e0d
BC		 2122 if (data->is_recover)
2123 nfs4_set_sequence_privileged(&data->c_arg.seq_args);
c970aa85 2124 task = rpc_run_task(&task_setup_data);
7a1218a2 2125 if (IS_ERR(task))
cdd4e68b 2126 return PTR_ERR(task);
cdd4e68b
TM		 2127 status = nfs4_wait_for_completion_rpc_task(task);
2128 if (status != 0) {
2129 data->cancelled = 1;
2130 smp_wmb();
2131 } else
2132 status = data->rpc_status;
e6b3c4db 2133 rpc_put_task(task);
1da177e4
LT		 2134 return status;
2135}
2136
24ac23ab 2137static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 2138{
24ac23ab
TM		 2139 struct nfs4_opendata *data = calldata;
2140 struct nfs4_state_owner *sp = data->owner;
549b19cc 2141 struct nfs_client *clp = sp->so_server->nfs_client;
2a606188 2142 enum open_claim_type4 claim = data->o_arg.claim;
5138fde0 2143
24ac23ab 2144 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 2145 goto out_wait;
aac00a8d
TM		 2146 /*
2147 * Check if we still need to send an OPEN call, or if we can use
2148 * a delegation instead.
2149 */
2150 if (data->state != NULL) {
2151 struct nfs_delegation *delegation;
2152
dc0b027d 2153 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 2154 goto out_no_action;
aac00a8d
TM		 2155 rcu_read_lock();
2156 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
2a606188 2157 if (can_open_delegated(delegation, data->o_arg.fmode, claim))
652f89f6 2158 goto unlock_no_action;
aac00a8d
TM		 2159 rcu_read_unlock();
2160 }
95b72eb0 2161 /* Update client id. */
549b19cc 2162 data->o_arg.clientid = clp->cl_clientid;
2a606188
TM		 2163 switch (claim) {
2164 default:
2165 break;
8188df17
TM		 2166 case NFS4_OPEN_CLAIM_PREVIOUS:
2167 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
2168 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 2169 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
8188df17
TM		 2170 case NFS4_OPEN_CLAIM_FH:
2171 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 2172 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
2173 }
26e976a8 2174 data->timestamp = jiffies;
035168ab 2175 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 2176 &data->o_arg.seq_args,
2240a9e2
TM		 2177 &data->o_res.seq_res,
2178 task) != 0)
2179 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 2180
2181 /* Set the create mode (note dependency on the session type) */
2182 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
2183 if (data->o_arg.open_flags & O_EXCL) {
2184 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
2185 if (nfs4_has_persistent_session(clp))
2186 data->o_arg.createmode = NFS4_CREATE_GUARDED;
2187 else if (clp->cl_mvops->minor_version > 0)
2188 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
2189 }
6ee41268 2190 return;
652f89f6 2191unlock_no_action:
9759b0fb 2192 trace_nfs4_cached_open(data->state);
652f89f6 2193 rcu_read_unlock();
6ee41268
TM		 2194out_no_action:
2195 task->tk_action = NULL;
c8da19b9 2196out_wait:
b75ad4cd 2197 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 2198}
2199
24ac23ab
TM		 2200static void nfs4_open_done(struct rpc_task *task, void *calldata)
2201{
2202 struct nfs4_opendata *data = calldata;
1da177e4 2203
24ac23ab 2204 data->rpc_status = task->tk_status;
d898528c 2205
2e80dbe7 2206 if (!nfs4_sequence_process(task, &data->o_res.seq_res))
14516c3a 2207 return;
d898528c 2208
24ac23ab 2209 if (task->tk_status == 0) {
807d66d8
TM		 2210 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
2211 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 2212 case S_IFREG:
2213 break;
2214 case S_IFLNK:
24ac23ab 2215 data->rpc_status = -ELOOP;
6f926b5b
TM		 2216 break;
2217 case S_IFDIR:
24ac23ab 2218 data->rpc_status = -EISDIR;
6f926b5b
TM		 2219 break;
2220 default:
24ac23ab 2221 data->rpc_status = -ENOTDIR;
807d66d8 2222 }
6f926b5b 2223 }
26e976a8 2224 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 2225 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
2226 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 2227 }
3e309914 2228 data->rpc_done = 1;
24ac23ab 2229}
6f926b5b 2230
24ac23ab
TM		 2231static void nfs4_open_release(void *calldata)
2232{
2233 struct nfs4_opendata *data = calldata;
2234 struct nfs4_state *state = NULL;
2235
2236 /* If this request hasn't been cancelled, do nothing */
2237 if (data->cancelled == 0)
2238 goto out_free;
2239 /* In case of error, no cleanup! */
3e309914 2240 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 2241 goto out_free;
2242 /* In case we need an open_confirm, no cleanup! */
2243 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
2244 goto out_free;
24ac23ab 2245 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 2246 if (!IS_ERR(state))
643168c2 2247 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 2248out_free:
c6d00e63 2249 nfs4_opendata_put(data);
24ac23ab
TM		 2250}
2251
2252static const struct rpc_call_ops nfs4_open_ops = {
2253 .rpc_call_prepare = nfs4_open_prepare,
2254 .rpc_call_done = nfs4_open_done,
2255 .rpc_release = nfs4_open_release,
2256};
2257
b257957e 2258static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab 2259{
2b0143b5 2260 struct inode *dir = d_inode(data->dir);
24ac23ab
TM		 2261 struct nfs_server *server = NFS_SERVER(dir);
2262 struct nfs_openargs *o_arg = &data->o_arg;
2263 struct nfs_openres *o_res = &data->o_res;
2264 struct rpc_task *task;
5138fde0
TM		 2265 struct rpc_message msg = {
2266 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
2267 .rpc_argp = o_arg,
2268 .rpc_resp = o_res,
2269 .rpc_cred = data->owner->so_cred,
2270 };
c970aa85
TM		 2271 struct rpc_task_setup task_setup_data = {
2272 .rpc_client = server->client,
5138fde0 2273 .rpc_message = &msg,
c970aa85
TM		 2274 .callback_ops = &nfs4_open_ops,
2275 .callback_data = data,
101070ca 2276 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2277 .flags = RPC_TASK_ASYNC,
2278 };
24ac23ab
TM		 2279 int status;
2280
a9c92d6b 2281 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 2282 kref_get(&data->kref);
3e309914
TM		 2283 data->rpc_done = 0;
2284 data->rpc_status = 0;
2ced46c2 2285 data->cancelled = 0;
bdeca1b7
TM		 2286 data->is_recover = 0;
2287 if (isrecover) {
8fe72bac 2288 nfs4_set_sequence_privileged(&o_arg->seq_args);
bdeca1b7
TM		 2289 data->is_recover = 1;
2290 }
c970aa85 2291 task = rpc_run_task(&task_setup_data);
b257957e
AB		 2292 if (IS_ERR(task))
2293 return PTR_ERR(task);
2294 status = nfs4_wait_for_completion_rpc_task(task);
2295 if (status != 0) {
2296 data->cancelled = 1;
2297 smp_wmb();
2298 } else
2299 status = data->rpc_status;
2300 rpc_put_task(task);
2301
2302 return status;
2303}
2304
2305static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
2306{
2b0143b5 2307 struct inode *dir = d_inode(data->dir);
b257957e
AB		 2308 struct nfs_openres *o_res = &data->o_res;
2309 int status;
2310
2311 status = nfs4_run_open_task(data, 1);
2312 if (status != 0 || !data->rpc_done)
2313 return status;
2314
6926afd1
TM		 2315 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
2316
b257957e
AB		 2317 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
2318 status = _nfs4_proc_open_confirm(data);
2319 if (status != 0)
2320 return status;
2321 }
2322
2323 return status;
2324}
2325
f3792d63
TM		 2326/*
2327 * Additional permission checks in order to distinguish between an
2328 * open for read, and an open for execute. This works around the
2329 * fact that NFSv4 OPEN treats read and execute permissions as being
2330 * the same.
2331 * Note that in the non-execute case, we want to turn off permission
2332 * checking if we just created a new file (POSIX open() semantics).
2333 */
6168f62c
WAA		 2334static int nfs4_opendata_access(struct rpc_cred *cred,
2335 struct nfs4_opendata *opendata,
f8d9a897
WAA		 2336 struct nfs4_state *state, fmode_t fmode,
2337 int openflags)
6168f62c
WAA		 2338{
2339 struct nfs_access_entry cache;
2340 u32 mask;
2341
2342 /* access call failed or for some reason the server doesn't
2343 * support any access modes -- defer access call until later */
2344 if (opendata->o_res.access_supported == 0)
2345 return 0;
2346
2347 mask = 0;
f3792d63
TM		 2348 /*
2349 * Use openflags to check for exec, because fmode won't
2350 * always have FMODE_EXEC set when file open for exec.
2351 */
f8d9a897
WAA		 2352 if (openflags & __FMODE_EXEC) {
2353 /* ONLY check for exec rights */
2354 mask = MAY_EXEC;
f3792d63 2355 } else if ((fmode & FMODE_READ) && !opendata->file_created)
f8d9a897 2356 mask = MAY_READ;
6168f62c
WAA		 2357
2358 cache.cred = cred;
2359 cache.jiffies = jiffies;
2360 nfs_access_set_mask(&cache, opendata->o_res.access_result);
2361 nfs_access_add_cache(state->inode, &cache);
2362
bbd3a8ee 2363 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 2364 return 0;
2365
2366 /* even though OPEN succeeded, access is denied. Close the file */
2367 nfs4_close_state(state, fmode);
998f40b5 2368 return -EACCES;
6168f62c
WAA		 2369}
2370
b257957e
AB		 2371/*
2372 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2373 */
2374static int _nfs4_proc_open(struct nfs4_opendata *data)
2375{
2b0143b5 2376 struct inode *dir = d_inode(data->dir);
b257957e
AB		 2377 struct nfs_server *server = NFS_SERVER(dir);
2378 struct nfs_openargs *o_arg = &data->o_arg;
2379 struct nfs_openres *o_res = &data->o_res;
2380 int status;
2381
2382 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 2383 if (!data->rpc_done)
2384 return status;
2385 if (status != 0) {
2386 if (status == -NFS4ERR_BADNAME &&
2387 !(o_arg->open_flags & O_CREAT))
2388 return -ENOENT;
24ac23ab 2389 return status;
08ef7bd3 2390 }
24ac23ab 2391
6926afd1
TM		 2392 nfs_fattr_map_and_free_names(server, &data->f_attr);
2393
5bc2afc2 2394 if (o_arg->open_flags & O_CREAT) {
5bc2afc2
TM		 2395 if (o_arg->open_flags & O_EXCL)
2396 data->file_created = 1;
2397 else if (o_res->cinfo.before != o_res->cinfo.after)
2398 data->file_created = 1;
2dfc6173 2399 if (data->file_created || dir->i_version != o_res->cinfo.after)
d3129ef6
TM		 2400 update_changeattr(dir, &o_res->cinfo,
2401 o_res->f_attr->time_start);
5bc2afc2 2402 }
0df5dd4a
TM		 2403 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2404 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 2405 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 2406 status = _nfs4_proc_open_confirm(data);
1da177e4 2407 if (status != 0)
24ac23ab 2408 return status;
1da177e4
LT		 2409 }
2410 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
8935ef66 2411 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
24ac23ab 2412 return 0;
1da177e4
LT		 2413}
2414
d83217c1
AA		 2415static int nfs4_recover_expired_lease(struct nfs_server *server)
2416{
2417 return nfs4_client_recover_expired_lease(server->nfs_client);
2418}
2419
1da177e4
LT		 2420/*
2421 * OPEN_EXPIRED:
2422 * reclaim state on the server after a network partition.
2423 * Assumes caller holds the appropriate lock
2424 */
539cd03a 2425static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 2426{
e56e0b78 2427 struct nfs4_opendata *opendata;
864472e9 2428 int ret;
1da177e4 2429
4a1c0893 2430 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 2431 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 2432 if (IS_ERR(opendata))
2433 return PTR_ERR(opendata);
864472e9 2434 ret = nfs4_open_recover(opendata, state);
35d05778 2435 if (ret == -ESTALE)
3d4ff43d 2436 d_drop(ctx->dentry);
c6d00e63 2437 nfs4_opendata_put(opendata);
864472e9 2438 return ret;
1da177e4
LT		 2439}
2440
a9ed2e25 2441static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 2442{
539cd03a 2443 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 2444 struct nfs4_exception exception = { };
2445 int err;
2446
2447 do {
539cd03a 2448 err = _nfs4_open_expired(ctx, state);
42113a75 2449 trace_nfs4_open_expired(ctx, 0, err);
49f9a0fa
TM		 2450 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2451 continue;
a9ed2e25
TM		 2452 switch (err) {
2453 default:
2454 goto out;
2455 case -NFS4ERR_GRACE:
2456 case -NFS4ERR_DELAY:
2457 nfs4_handle_exception(server, err, &exception);
2458 err = 0;
2459 }
202b50dc 2460 } while (exception.retry);
a9ed2e25 2461out:
202b50dc
TM		 2462 return err;
2463}
2464
1da177e4
LT		 2465static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2466{
1da177e4 2467 struct nfs_open_context *ctx;
864472e9 2468 int ret;
1da177e4 2469
864472e9
TM		 2470 ctx = nfs4_state_find_open_context(state);
2471 if (IS_ERR(ctx))
91876b13 2472 return -EAGAIN;
539cd03a 2473 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 2474 put_nfs_open_context(ctx);
2475 return ret;
1da177e4
LT		 2476}
2477
41020b67
TM		 2478static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state,
2479 const nfs4_stateid *stateid)
4dfd4f7a 2480{
41020b67 2481 nfs_remove_bad_delegation(state->inode, stateid);
4dfd4f7a
TM		 2482 write_seqlock(&state->seqlock);
2483 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2484 write_sequnlock(&state->seqlock);
2485 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2486}
2487
2488static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
2489{
2490 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
41020b67 2491 nfs_finish_clear_delegation_stateid(state, NULL);
4dfd4f7a
TM		 2492}
2493
2494static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2495{
2496 /* NFSv4.0 doesn't allow for delegation recovery on open expire */
2497 nfs40_clear_delegation_stateid(state);
2498 return nfs4_open_expired(sp, state);
2499}
2500
45870d69
TM		 2501static int nfs40_test_and_free_expired_stateid(struct nfs_server *server,
2502 nfs4_stateid *stateid,
2503 struct rpc_cred *cred)
2504{
2505 return -NFS4ERR_BAD_STATEID;
2506}
2507
f062eb6c 2508#if defined(CONFIG_NFS_V4_1)
4586f6e2
TM		 2509static int nfs41_test_and_free_expired_stateid(struct nfs_server *server,
2510 nfs4_stateid *stateid,
2511 struct rpc_cred *cred)
2512{
2513 int status;
2514
f7a62ada
TM		 2515 switch (stateid->type) {
2516 default:
2517 break;
2518 case NFS4_INVALID_STATEID_TYPE:
2519 case NFS4_SPECIAL_STATEID_TYPE:
2520 return -NFS4ERR_BAD_STATEID;
2521 case NFS4_REVOKED_STATEID_TYPE:
2522 goto out_free;
2523 }
4586f6e2 2524
f7a62ada 2525 status = nfs41_test_stateid(server, stateid, cred);
4586f6e2
TM		 2526 switch (status) {
2527 case -NFS4ERR_EXPIRED:
2528 case -NFS4ERR_ADMIN_REVOKED:
2529 case -NFS4ERR_DELEG_REVOKED:
f7a62ada
TM		 2530 break;
2531 default:
4586f6e2
TM		 2532 return status;
2533 }
f7a62ada
TM		 2534out_free:
2535 /* Ack the revoked state to the server */
f0b0bf88 2536 nfs41_free_stateid(server, stateid, cred, true);
f7a62ada 2537 return -NFS4ERR_EXPIRED;
4586f6e2
TM		 2538}
2539
0c116cad 2540static void nfs41_check_delegation_stateid(struct nfs4_state *state)
f062eb6c 2541{
f062eb6c 2542 struct nfs_server *server = NFS_SERVER(state->inode);
0c116cad 2543 nfs4_stateid stateid;
ab7cb0df 2544 struct nfs_delegation *delegation;
0c116cad
TM		 2545 struct rpc_cred *cred;
2546 int status;
3e60ffdd 2547
ab7cb0df
TM		 2548 /* Get the delegation credential for use by test/free_stateid */
2549 rcu_read_lock();
2550 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
0c116cad 2551 if (delegation == NULL) {
ab7cb0df 2552 rcu_read_unlock();
0c116cad
TM		 2553 return;
2554 }
2555
2556 nfs4_stateid_copy(&stateid, &delegation->stateid);
4c8e5447
TM		 2557 if (test_bit(NFS_DELEGATION_REVOKED, &delegation->flags)) {
2558 rcu_read_unlock();
41020b67 2559 nfs_finish_clear_delegation_stateid(state, &stateid);
4c8e5447
TM		 2560 return;
2561 }
0c116cad 2562
63d63cbf
TM		 2563 if (!test_and_clear_bit(NFS_DELEGATION_TEST_EXPIRED, &delegation->flags)) {
2564 rcu_read_unlock();
2565 return;
2566 }
2567
0c116cad
TM		 2568 cred = get_rpccred(delegation->cred);
2569 rcu_read_unlock();
4586f6e2 2570 status = nfs41_test_and_free_expired_stateid(server, &stateid, cred);
0c116cad 2571 trace_nfs4_test_delegation_stateid(state, NULL, status);
f7a62ada 2572 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID)
41020b67 2573 nfs_finish_clear_delegation_stateid(state, &stateid);
ab7cb0df 2574
0c116cad 2575 put_rpccred(cred);
3e60ffdd
CL		 2576}
2577
c5896fc8
TM		 2578/**
2579 * nfs41_check_expired_locks - possibly free a lock stateid
2580 *
2581 * @state: NFSv4 state for an inode
2582 *
2583 * Returns NFS_OK if recovery for this stateid is now finished.
2584 * Otherwise a negative NFS4ERR value is returned.
2585 */
2586static int nfs41_check_expired_locks(struct nfs4_state *state)
2587{
2588 int status, ret = NFS_OK;
d75a6a0e 2589 struct nfs4_lock_state *lsp, *prev = NULL;
c5896fc8
TM		 2590 struct nfs_server *server = NFS_SERVER(state->inode);
2591
2592 if (!test_bit(LK_STATE_IN_USE, &state->flags))
2593 goto out;
d75a6a0e
BC		 2594
2595 spin_lock(&state->state_lock);
c5896fc8
TM		 2596 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
2597 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
2598 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
2599
d75a6a0e
BC		 2600 atomic_inc(&lsp->ls_count);
2601 spin_unlock(&state->state_lock);
2602
2603 nfs4_put_lock_state(prev);
2604 prev = lsp;
2605
c5896fc8
TM		 2606 status = nfs41_test_and_free_expired_stateid(server,
2607 &lsp->ls_stateid,
2608 cred);
2609 trace_nfs4_test_lock_stateid(state, lsp, status);
2610 if (status == -NFS4ERR_EXPIRED ||
2611 status == -NFS4ERR_BAD_STATEID) {
2612 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
67dd4830 2613 lsp->ls_stateid.type = NFS4_INVALID_STATEID_TYPE;
c5896fc8
TM		 2614 if (!recover_lost_locks)
2615 set_bit(NFS_LOCK_LOST, &lsp->ls_flags);
2616 } else if (status != NFS_OK) {
2617 ret = status;
d75a6a0e
BC		 2618 nfs4_put_lock_state(prev);
2619 goto out;
c5896fc8 2620 }
d75a6a0e 2621 spin_lock(&state->state_lock);
c5896fc8 2622 }
d75a6a0e
BC		 2623 }
2624 spin_unlock(&state->state_lock);
2625 nfs4_put_lock_state(prev);
c5896fc8
TM		 2626out:
2627 return ret;
2628}
2629
3e60ffdd
CL		 2630/**
2631 * nfs41_check_open_stateid - possibly free an open stateid
2632 *
2633 * @state: NFSv4 state for an inode
2634 *
2635 * Returns NFS_OK if recovery for this stateid is now finished.
2636 * Otherwise a negative NFS4ERR value is returned.
2637 */
2638static int nfs41_check_open_stateid(struct nfs4_state *state)
2639{
2640 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 2641 nfs4_stateid *stateid = &state->open_stateid;
ab7cb0df 2642 struct rpc_cred *cred = state->owner->so_cred;
3e60ffdd
CL		 2643 int status;
2644
b134fc4a 2645 if (test_bit(NFS_OPEN_STATE, &state->flags) == 0) {
8a64c4ef
TM		 2646 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) {
2647 if (nfs4_have_delegation(state->inode, state->state))
2648 return NFS_OK;
2649 return -NFS4ERR_OPENMODE;
2650 }
3e60ffdd 2651 return -NFS4ERR_BAD_STATEID;
b134fc4a 2652 }
4586f6e2 2653 status = nfs41_test_and_free_expired_stateid(server, stateid, cred);
08cb47fa 2654 trace_nfs4_test_open_stateid(state, NULL, status);
f7a62ada 2655 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID) {
3e60ffdd
CL		 2656 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2657 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2658 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 2659 clear_bit(NFS_OPEN_STATE, &state->flags);
67dd4830 2660 stateid->type = NFS4_INVALID_STATEID_TYPE;
b01dd1d8 2661 }
8a64c4ef
TM		 2662 if (status != NFS_OK)
2663 return status;
2664 if (nfs_open_stateid_recover_openmode(state))
2665 return -NFS4ERR_OPENMODE;
2666 return NFS_OK;
b01dd1d8
BS		 2667}
2668
2669static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2670{
eb64cf96 2671 int status;
b01dd1d8 2672
0c116cad 2673 nfs41_check_delegation_stateid(state);
c5896fc8
TM		 2674 status = nfs41_check_expired_locks(state);
2675 if (status != NFS_OK)
2676 return status;
3e60ffdd 2677 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 2678 if (status != NFS_OK)
2679 status = nfs4_open_expired(sp, state);
2680 return status;
f062eb6c
BS		 2681}
2682#endif
2683
aa53ed54
JL		 2684/*
2685 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2686 * fields corresponding to attributes that were used to store the verifier.
2687 * Make sure we clobber those fields in the later setattr call
2688 */
5334c5bd
KM		 2689static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata,
2690 struct iattr *sattr, struct nfs4_label **label)
aa53ed54 2691{
5334c5bd
KM		 2692 const u32 *attrset = opendata->o_res.attrset;
2693
2694 if ((attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
aa53ed54
JL		 2695 !(sattr->ia_valid & ATTR_ATIME_SET))
2696 sattr->ia_valid |= ATTR_ATIME;
2697
5334c5bd 2698 if ((attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
aa53ed54
JL		 2699 !(sattr->ia_valid & ATTR_MTIME_SET))
2700 sattr->ia_valid |= ATTR_MTIME;
5334c5bd
KM		 2701
2702 /* Except MODE, it seems harmless of setting twice. */
a430607b
BC		 2703 if (opendata->o_arg.createmode != NFS4_CREATE_EXCLUSIVE &&
2704 attrset[1] & FATTR4_WORD1_MODE)
5334c5bd
KM		 2705 sattr->ia_valid &= ~ATTR_MODE;
2706
2707 if (attrset[2] & FATTR4_WORD2_SECURITY_LABEL)
2708 *label = NULL;
aa53ed54
JL		 2709}
2710
c21443c2
TM		 2711static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2712 fmode_t fmode,
2713 int flags,
3efb9722 2714 struct nfs_open_context *ctx)
c21443c2
TM		 2715{
2716 struct nfs4_state_owner *sp = opendata->owner;
2717 struct nfs_server *server = sp->so_server;
275bb307 2718 struct dentry *dentry;
c21443c2
TM		 2719 struct nfs4_state *state;
2720 unsigned int seq;
2721 int ret;
2722
2723 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2724
2725 ret = _nfs4_proc_open(opendata);
dca78001 2726 if (ret != 0)
c21443c2
TM		 2727 goto out;
2728
2729 state = nfs4_opendata_to_nfs4_state(opendata);
2730 ret = PTR_ERR(state);
2731 if (IS_ERR(state))
2732 goto out;
2733 if (server->caps & NFS_CAP_POSIX_LOCK)
2734 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
a8ce377a
JL		 2735 if (opendata->o_res.rflags & NFS4_OPEN_RESULT_MAY_NOTIFY_LOCK)
2736 set_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags);
c21443c2 2737
275bb307 2738 dentry = opendata->dentry;
2b0143b5 2739 if (d_really_is_negative(dentry)) {
668d0cd5 2740 struct dentry *alias;
275bb307 2741 d_drop(dentry);
668d0cd5
AV		 2742 alias = d_exact_alias(dentry, state->inode);
2743 if (!alias)
2744 alias = d_splice_alias(igrab(state->inode), dentry);
2745 /* d_splice_alias() can't fail here - it's a non-directory */
2746 if (alias) {
275bb307 2747 dput(ctx->dentry);
668d0cd5 2748 ctx->dentry = dentry = alias;
275bb307
TM		 2749 }
2750 nfs_set_verifier(dentry,
2b0143b5 2751 nfs_save_change_attribute(d_inode(opendata->dir)));
275bb307
TM		 2752 }
2753
c21443c2
TM		 2754 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2755 if (ret != 0)
2756 goto out;
2757
3efb9722 2758 ctx->state = state;
2b0143b5 2759 if (d_inode(dentry) == state->inode) {
c45ffdd2
TM		 2760 nfs_inode_attach_open_context(ctx);
2761 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2762 nfs4_schedule_stateid_recovery(server, state);
2763 }
c21443c2
TM		 2764out:
2765 return ret;
2766}
2767
1da177e4 2768/*
24ac23ab 2769 * Returns a referenced nfs4_state
1da177e4 2770 */
82be417a 2771static int _nfs4_do_open(struct inode *dir,
4197a055 2772 struct nfs_open_context *ctx,
82be417a
AA		 2773 int flags,
2774 struct iattr *sattr,
5bc2afc2
TM		 2775 struct nfs4_label *label,
2776 int *opened)
1da177e4
LT		 2777{
2778 struct nfs4_state_owner *sp;
2779 struct nfs4_state *state = NULL;
2780 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 2781 struct nfs4_opendata *opendata;
4197a055
TM		 2782 struct dentry *dentry = ctx->dentry;
2783 struct rpc_cred *cred = ctx->cred;
2784 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2785 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
49f9a0fa 2786 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
1775fd3e 2787 struct nfs4_label *olabel = NULL;
aac00a8d 2788 int status;
1da177e4
LT		 2789
2790 /* Protect against reboot recovery conflicts */
1da177e4 2791 status = -ENOMEM;
d1e284d5
TM		 2792 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2793 if (sp == NULL) {
1da177e4
LT		 2794 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2795 goto out_err;
2796 }
58d9714a
TM		 2797 status = nfs4_recover_expired_lease(server);
2798 if (status != 0)
b4454fe1 2799 goto err_put_state_owner;
2b0143b5
DH		 2800 if (d_really_is_positive(dentry))
2801 nfs4_return_incompatible_delegation(d_inode(dentry), fmode);
58d9714a 2802 status = -ENOMEM;
2b0143b5 2803 if (d_really_is_positive(dentry))
49f9a0fa 2804 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2805 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
1775fd3e 2806 label, claim, GFP_KERNEL);
e56e0b78 2807 if (opendata == NULL)
95d35cb4 2808 goto err_put_state_owner;
1da177e4 2809
14c43f76
DQ		 2810 if (label) {
2811 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2812 if (IS_ERR(olabel)) {
2813 status = PTR_ERR(olabel);
2814 goto err_opendata_put;
2815 }
2816 }
2817
e911b815
TM		 2818 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2819 if (!opendata->f_attr.mdsthreshold) {
2820 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2821 if (!opendata->f_attr.mdsthreshold)
2822 goto err_free_label;
2823 }
1549210f 2824 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2825 }
2b0143b5
DH		 2826 if (d_really_is_positive(dentry))
2827 opendata->state = nfs4_get_open_state(d_inode(dentry), sp);
aac00a8d 2828
3efb9722 2829 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
6168f62c 2830 if (status != 0)
14c43f76 2831 goto err_free_label;
3efb9722 2832 state = ctx->state;
6168f62c 2833
efcbc04e 2834 if ((opendata->o_arg.open_flags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) &&
549b19cc 2835 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
5334c5bd 2836 nfs4_exclusive_attrset(opendata, sattr, &label);
a1d1c4f1
TM		 2837 /*
2838 * send create attributes which was not set by open
2839 * with an extra setattr.
2840 */
2841 if (sattr->ia_valid & NFS4_VALID_ATTRS) {
2842 nfs_fattr_init(opendata->o_res.f_attr);
2843 status = nfs4_do_setattr(state->inode, cred,
2844 opendata->o_res.f_attr, sattr,
29b59f94 2845 ctx, label, olabel);
a1d1c4f1
TM		 2846 if (status == 0) {
2847 nfs_setattr_update_inode(state->inode, sattr,
2848 opendata->o_res.f_attr);
2849 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
2850 }
1775fd3e 2851 }
0ab64e0e 2852 }
c5c3fb5f 2853 if (opened && opendata->file_created)
5bc2afc2 2854 *opened |= FILE_CREATED;
82be417a 2855
e911b815 2856 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
82be417a 2857 *ctx_th = opendata->f_attr.mdsthreshold;
e911b815
TM		 2858 opendata->f_attr.mdsthreshold = NULL;
2859 }
82be417a 2860
14c43f76
DQ		 2861 nfs4_label_free(olabel);
2862
c6d00e63 2863 nfs4_opendata_put(opendata);
1da177e4 2864 nfs4_put_state_owner(sp);
1da177e4 2865 return 0;
14c43f76
DQ		 2866err_free_label:
2867 nfs4_label_free(olabel);
c6d00e63
TM		 2868err_opendata_put:
2869 nfs4_opendata_put(opendata);
e56e0b78
TM		 2870err_put_state_owner:
2871 nfs4_put_state_owner(sp);
1da177e4 2872out_err:
1da177e4
LT		 2873 return status;
2874}
2875
2876
82be417a 2877static struct nfs4_state *nfs4_do_open(struct inode *dir,
4197a055 2878 struct nfs_open_context *ctx,
82be417a
AA		 2879 int flags,
2880 struct iattr *sattr,
5bc2afc2
TM		 2881 struct nfs4_label *label,
2882 int *opened)
1da177e4 2883{
49f9a0fa 2884 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2885 struct nfs4_exception exception = { };
2886 struct nfs4_state *res;
2887 int status;
2888
2889 do {
5bc2afc2 2890 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
3efb9722 2891 res = ctx->state;
42113a75 2892 trace_nfs4_open_file(ctx, flags, status);
1da177e4
LT		 2893 if (status == 0)
2894 break;
2895 /* NOTE: BAD_SEQID means the server and client disagree about the
2896 * book-keeping w.r.t. state-changing operations
2897 * (OPEN/CLOSE/LOCK/LOCKU...)
2898 * It is actually a sign of a bug on the client or on the server.
2899 *
2900 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2901 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2902 * have unhashed the old state_owner for us, and that we can
2903 * therefore safely retry using a new one. We should still warn
2904 * the user though...
2905 */
2906 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2907 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2908 " returned a bad sequence-id error!\n",
2909 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2910 exception.retry = 1;
2911 continue;
2912 }
550f5747
TM		 2913 /*
2914 * BAD_STATEID on OPEN means that the server cancelled our
2915 * state before it received the OPEN_CONFIRM.
2916 * Recover by retrying the request as per the discussion
2917 * on Page 181 of RFC3530.
2918 */
2919 if (status == -NFS4ERR_BAD_STATEID) {
2920 exception.retry = 1;
2921 continue;
2922 }
aac00a8d
TM		 2923 if (status == -EAGAIN) {
2924 /* We must have found a delegation */
2925 exception.retry = 1;
2926 continue;
2927 }
49f9a0fa
TM		 2928 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2929 continue;
2930 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2931 status, &exception));
2932 } while (exception.retry);
2933 return res;
2934}
2935
8487c479
TM		 2936static int _nfs4_do_setattr(struct inode *inode,
2937 struct nfs_setattrargs *arg,
2938 struct nfs_setattrres *res,
2939 struct rpc_cred *cred,
29b59f94 2940 struct nfs_open_context *ctx)
1da177e4 2941{
3e4f6290 2942 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2943 struct rpc_message msg = {
659bfcd6 2944 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
8487c479
TM		 2945 .rpc_argp = arg,
2946 .rpc_resp = res,
659bfcd6 2947 .rpc_cred = cred,
1da177e4 2948 };
abf4e13c 2949 struct rpc_cred *delegation_cred = NULL;
26e976a8 2950 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2951 fmode_t fmode;
2952 bool truncate;
65e4308d 2953 int status;
1da177e4 2954
8487c479 2955 nfs_fattr_init(res->fattr);
1da177e4 2956
ee3ae84e 2957 /* Servers should only apply open mode checks for file size changes */
8487c479 2958 truncate = (arg->iap->ia_valid & ATTR_SIZE) ? true : false;
ee3ae84e
TM		 2959 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2960
8487c479 2961 if (nfs4_copy_delegation_stateid(inode, fmode, &arg->stateid, &delegation_cred)) {
ee3ae84e 2962 /* Use that stateid */
29b59f94 2963 } else if (truncate && ctx != NULL) {
17393475 2964 struct nfs_lock_context *l_ctx;
29b59f94 2965 if (!nfs4_valid_open_stateid(ctx->state))
0418dae1 2966 return -EBADF;
17393475
N		 2967 l_ctx = nfs_get_lock_context(ctx);
2968 if (IS_ERR(l_ctx))
2969 return PTR_ERR(l_ctx);
7a0566b3
N		 2970 status = nfs4_select_rw_stateid(ctx->state, FMODE_WRITE, l_ctx,
2971 &arg->stateid, &delegation_cred);
2972 nfs_put_lock_context(l_ctx);
2973 if (status == -EIO)
0418dae1 2974 return -EBADF;
08e9eac4 2975 } else
8487c479 2976 nfs4_stateid_copy(&arg->stateid, &zero_stateid);
abf4e13c
TM		 2977 if (delegation_cred)
2978 msg.rpc_cred = delegation_cred;
1da177e4 2979
8487c479 2980 status = nfs4_call_sync(server->client, server, &msg, &arg->seq_args, &res->seq_res, 1);
abf4e13c
TM		 2981
2982 put_rpccred(delegation_cred);
29b59f94 2983 if (status == 0 && ctx != NULL)
26e976a8 2984 renew_lease(server, timestamp);
8487c479 2985 trace_nfs4_setattr(inode, &arg->stateid, status);
65e4308d 2986 return status;
1da177e4
LT		 2987}
2988
659bfcd6
TM		 2989static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2990 struct nfs_fattr *fattr, struct iattr *sattr,
29b59f94 2991 struct nfs_open_context *ctx, struct nfs4_label *ilabel,
1775fd3e 2992 struct nfs4_label *olabel)
1da177e4 2993{
3e4f6290 2994 struct nfs_server *server = NFS_SERVER(inode);
29b59f94 2995 struct nfs4_state *state = ctx ? ctx->state : NULL;
8487c479
TM		 2996 struct nfs_setattrargs arg = {
2997 .fh = NFS_FH(inode),
2998 .iap = sattr,
2999 .server = server,
3000 .bitmask = server->attr_bitmask,
3001 .label = ilabel,
3002 };
3003 struct nfs_setattrres res = {
3004 .fattr = fattr,
3005 .label = olabel,
3006 .server = server,
3007 };
a1d0b5ee
TM		 3008 struct nfs4_exception exception = {
3009 .state = state,
3114ea7a 3010 .inode = inode,
8487c479 3011 .stateid = &arg.stateid,
a1d0b5ee 3012 };
1da177e4 3013 int err;
8487c479
TM		 3014
3015 arg.bitmask = nfs4_bitmask(server, ilabel);
3016 if (ilabel)
3017 arg.bitmask = nfs4_bitmask(server, olabel);
3018
1da177e4 3019 do {
29b59f94 3020 err = _nfs4_do_setattr(inode, &arg, &res, cred, ctx);
451146be
TM		 3021 switch (err) {
3022 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 3023 if (!(sattr->ia_valid & ATTR_SIZE)) {
3024 pr_warn_once("NFSv4: server %s is incorrectly "
3025 "applying open mode checks to "
3026 "a SETATTR that is not "
3027 "changing file size.\n",
3028 server->nfs_client->cl_hostname);
3029 }
451146be
TM		 3030 if (state && !(state->state & FMODE_WRITE)) {
3031 err = -EBADF;
3032 if (sattr->ia_valid & ATTR_OPEN)
3033 err = -EACCES;
3034 goto out;
3035 }
3036 }
3037 err = nfs4_handle_exception(server, err, &exception);
1da177e4 3038 } while (exception.retry);
451146be 3039out:
1da177e4
LT		 3040 return err;
3041}
3042
500d701f
PT		 3043static bool
3044nfs4_wait_on_layoutreturn(struct inode *inode, struct rpc_task *task)
3045{
3046 if (inode == NULL || !nfs_have_layout(inode))
3047 return false;
3048
3049 return pnfs_wait_on_layoutreturn(inode, task);
3050}
3051
1da177e4
LT		 3052struct nfs4_closedata {
3053 struct inode *inode;
3054 struct nfs4_state *state;
3055 struct nfs_closeargs arg;
3056 struct nfs_closeres res;
cf805165
TM		 3057 struct {
3058 struct nfs4_layoutreturn_args arg;
3059 struct nfs4_layoutreturn_res res;
4d796d75 3060 struct nfs4_xdr_opaque_data ld_private;
cf805165
TM		 3061 u32 roc_barrier;
3062 bool roc;
3063 } lr;
516a6af6 3064 struct nfs_fattr fattr;
26e976a8 3065 unsigned long timestamp;
1da177e4
LT		 3066};
3067
963d8fe5 3068static void nfs4_free_closedata(void *data)
9512135d 3069{
963d8fe5
TM		 3070 struct nfs4_closedata *calldata = data;
3071 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 3072 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 3073
cf805165 3074 if (calldata->lr.roc)
1c5bd76d
TM		 3075 pnfs_roc_release(&calldata->lr.arg, &calldata->lr.res,
3076 calldata->res.lr_ret);
9512135d
TM		 3077 nfs4_put_open_state(calldata->state);
3078 nfs_free_seqid(calldata->arg.seqid);
9512135d 3079 nfs4_put_state_owner(sp);
322b2b90 3080 nfs_sb_deactive(sb);
9512135d
TM		 3081 kfree(calldata);
3082}
3083
963d8fe5 3084static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 3085{
963d8fe5 3086 struct nfs4_closedata *calldata = data;
1da177e4 3087 struct nfs4_state *state = calldata->state;
1da177e4 3088 struct nfs_server *server = NFS_SERVER(calldata->inode);
412f6c4c 3089 nfs4_stateid *res_stateid = NULL;
1da177e4 3090
a3ca5651 3091 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 3092 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
3093 return;
42113a75 3094 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
cf805165
TM		 3095
3096 /* Handle Layoutreturn errors */
3097 if (calldata->arg.lr_args && task->tk_status != 0) {
3098 switch (calldata->res.lr_ret) {
3099 default:
3100 calldata->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
3101 break;
3102 case 0:
3103 calldata->arg.lr_args = NULL;
3104 calldata->res.lr_res = NULL;
3105 break;
3106 case -NFS4ERR_ADMIN_REVOKED:
3107 case -NFS4ERR_DELEG_REVOKED:
3108 case -NFS4ERR_EXPIRED:
3109 case -NFS4ERR_BAD_STATEID:
3110 case -NFS4ERR_OLD_STATEID:
3111 case -NFS4ERR_UNKNOWN_LAYOUTTYPE:
3112 case -NFS4ERR_WRONG_CRED:
3113 calldata->arg.lr_args = NULL;
3114 calldata->res.lr_res = NULL;
3115 calldata->res.lr_ret = 0;
3116 rpc_restart_call_prepare(task);
3117 return;
3118 }
3119 }
3120
1da177e4
LT		 3121 /* hmm. we are done with the inode, and in the process of freeing
3122 * the state_owner. we keep this around to process errors
3123 */
1da177e4
LT		 3124 switch (task->tk_status) {
3125 case 0:
412f6c4c 3126 res_stateid = &calldata->res.stateid;
26e976a8 3127 renew_lease(server, calldata->timestamp);
412f6c4c 3128 break;
f07d4a31
TM		 3129 case -NFS4ERR_ACCESS:
3130 if (calldata->arg.bitmask != NULL) {
3131 calldata->arg.bitmask = NULL;
3132 calldata->res.fattr = NULL;
3133 task->tk_status = 0;
3134 rpc_restart_call_prepare(task);
3135 goto out_release;
3136
3137 }
3138 break;
69794ad7 3139 case -NFS4ERR_ADMIN_REVOKED:
1da177e4 3140 case -NFS4ERR_STALE_STATEID:
26d36301
TM		 3141 case -NFS4ERR_EXPIRED:
3142 nfs4_free_revoked_stateid(server,
3143 &calldata->arg.stateid,
3144 task->tk_msg.rpc_cred);
9e33bed5
TM		 3145 case -NFS4ERR_OLD_STATEID:
3146 case -NFS4ERR_BAD_STATEID:
566fcec6 3147 if (!nfs4_stateid_match(&calldata->arg.stateid,
369d6b7f 3148 &state->open_stateid)) {
566fcec6
TM		 3149 rpc_restart_call_prepare(task);
3150 goto out_release;
3151 }
dc0b027d 3152 if (calldata->arg.fmode == 0)
9e33bed5 3153 break;
1da177e4 3154 default:
8478eaa1 3155 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN) {
72211dbe 3156 rpc_restart_call_prepare(task);
69794ad7
TM		 3157 goto out_release;
3158 }
1da177e4 3159 }
4a1e2feb
TM		 3160 nfs_clear_open_stateid(state, &calldata->arg.stateid,
3161 res_stateid, calldata->arg.fmode);
69794ad7 3162out_release:
72211dbe 3163 nfs_release_seqid(calldata->arg.seqid);
d8d84983 3164 nfs_refresh_inode(calldata->inode, &calldata->fattr);
a3ca5651 3165 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 3166}
3167
4ce70ada 3168static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 3169{
4ce70ada 3170 struct nfs4_closedata *calldata = data;
9512135d 3171 struct nfs4_state *state = calldata->state;
7fdab069 3172 struct inode *inode = calldata->inode;
aee7af35 3173 bool is_rdonly, is_wronly, is_rdwr;
88069f77 3174 int call_close = 0;
9512135d 3175
a3ca5651 3176 dprintk("%s: begin!\n", __func__);
963d8fe5 3177 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 3178 goto out_wait;
003707c7 3179
88069f77 3180 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
4cecb76f 3181 spin_lock(&state->owner->so_lock);
aee7af35
TM		 3182 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
3183 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
3184 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
369d6b7f 3185 nfs4_stateid_copy(&calldata->arg.stateid, &state->open_stateid);
003707c7 3186 /* Calculate the change in open mode */
cd9288ff 3187 calldata->arg.fmode = 0;
e7616923 3188 if (state->n_rdwr == 0) {
cd9288ff
TM		 3189 if (state->n_rdonly == 0)
3190 call_close |= is_rdonly;
3191 else if (is_rdonly)
3192 calldata->arg.fmode |= FMODE_READ;
3193 if (state->n_wronly == 0)
3194 call_close |= is_wronly;
3195 else if (is_wronly)
3196 calldata->arg.fmode |= FMODE_WRITE;
e547f262
TM		 3197 if (calldata->arg.fmode != (FMODE_READ|FMODE_WRITE))
3198 call_close |= is_rdwr;
cd9288ff
TM		 3199 } else if (is_rdwr)
3200 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
3201
5cc7861e
TM		 3202 if (!nfs4_valid_open_stateid(state) ||
3203 test_bit(NFS_OPEN_STATE, &state->flags) == 0)
5d422301 3204 call_close = 0;
4cecb76f 3205 spin_unlock(&state->owner->so_lock);
88069f77
TM		 3206
3207 if (!call_close) {
963d8fe5 3208 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 3209 goto out_no_action;
9512135d 3210 }
88069f77 3211
1c5bd76d 3212 if (!calldata->lr.roc && nfs4_wait_on_layoutreturn(inode, task)) {
500d701f
PT		 3213 nfs_release_seqid(calldata->arg.seqid);
3214 goto out_wait;
3215 }
3216
9413a1a1 3217 if (calldata->arg.fmode == 0)
88069f77 3218 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
3ecefc92 3219
9413a1a1 3220 if (calldata->arg.fmode == 0 || calldata->arg.fmode == FMODE_READ) {
3ecefc92
TM		 3221 /* Close-to-open cache consistency revalidation */
3222 if (!nfs4_have_delegation(inode, FMODE_READ))
3223 calldata->arg.bitmask = NFS_SERVER(inode)->cache_consistency_bitmask;
3224 else
3225 calldata->arg.bitmask = NULL;
3226 }
3c13cb5b 3227
6ae37339
TM		 3228 calldata->arg.share_access =
3229 nfs4_map_atomic_open_share(NFS_SERVER(inode),
3230 calldata->arg.fmode, 0);
88069f77 3231
d8d84983
TM		 3232 if (calldata->res.fattr == NULL)
3233 calldata->arg.bitmask = NULL;
3234 else if (calldata->arg.bitmask == NULL)
3235 calldata->res.fattr = NULL;
26e976a8 3236 calldata->timestamp = jiffies;
7fdab069 3237 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 3238 &calldata->arg.seq_args,
3239 &calldata->res.seq_res,
2240a9e2
TM		 3240 task) != 0)
3241 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 3242 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 3243 return;
3244out_no_action:
3245 task->tk_action = NULL;
3246out_wait:
3247 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 3248}
3249
963d8fe5 3250static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 3251 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 3252 .rpc_call_done = nfs4_close_done,
3253 .rpc_release = nfs4_free_closedata,
3254};
3255
1da177e4
LT		 3256/*
3257 * It is possible for data to be read/written from a mem-mapped file
3258 * after the sys_close call (which hits the vfs layer as a flush).
3259 * This means that we can't safely call nfsv4 close on a file until
3260 * the inode is cleared. This in turn means that we are not good
3261 * NFSv4 citizens - we do not indicate to the server to update the file's
3262 * share state even when we are done with one of the three share
3263 * stateid's in the inode.
3264 *
3265 * NOTE: Caller must be holding the sp->so_owner semaphore!
3266 */
1f7977c1 3267int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 3268{
4a35bd41 3269 struct nfs_server *server = NFS_SERVER(state->inode);
63f5f796 3270 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
1da177e4 3271 struct nfs4_closedata *calldata;
b39e625b
TM		 3272 struct nfs4_state_owner *sp = state->owner;
3273 struct rpc_task *task;
5138fde0
TM		 3274 struct rpc_message msg = {
3275 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
3276 .rpc_cred = state->owner->so_cred,
3277 };
c970aa85
TM		 3278 struct rpc_task_setup task_setup_data = {
3279 .rpc_client = server->client,
5138fde0 3280 .rpc_message = &msg,
c970aa85 3281 .callback_ops = &nfs4_close_ops,
101070ca 3282 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3283 .flags = RPC_TASK_ASYNC,
3284 };
9512135d 3285 int status = -ENOMEM;
1da177e4 3286
fa940720
WAA		 3287 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
3288 &task_setup_data.rpc_client, &msg);
3289
8535b2be 3290 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 3291 if (calldata == NULL)
9512135d 3292 goto out;
a9c92d6b 3293 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 3294 calldata->inode = state->inode;
1da177e4 3295 calldata->state = state;
4a35bd41 3296 calldata->arg.fh = NFS_FH(state->inode);
1da177e4 3297 /* Serialization for the sequence id */
63f5f796
TM		 3298 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
3299 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask);
badc76dd 3300 if (IS_ERR(calldata->arg.seqid))
9512135d 3301 goto out_free_calldata;
d8d84983 3302 nfs_fattr_init(&calldata->fattr);
dc0b027d 3303 calldata->arg.fmode = 0;
4d796d75 3304 calldata->lr.arg.ld_private = &calldata->lr.ld_private;
516a6af6 3305 calldata->res.fattr = &calldata->fattr;
c1d51931 3306 calldata->res.seqid = calldata->arg.seqid;
516a6af6 3307 calldata->res.server = server;
cf805165 3308 calldata->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
1c5bd76d
TM		 3309 calldata->lr.roc = pnfs_roc(state->inode,
3310 &calldata->lr.arg, &calldata->lr.res, msg.rpc_cred);
3311 if (calldata->lr.roc) {
3312 calldata->arg.lr_args = &calldata->lr.arg;
3313 calldata->res.lr_res = &calldata->lr.res;
3314 }
643168c2 3315 nfs_sb_active(calldata->inode->i_sb);
9512135d 3316
1174dd1f
TM		 3317 msg.rpc_argp = &calldata->arg;
3318 msg.rpc_resp = &calldata->res;
c970aa85
TM		 3319 task_setup_data.callback_data = calldata;
3320 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 3321 if (IS_ERR(task))
3322 return PTR_ERR(task);
a49c3c77
TM		 3323 status = 0;
3324 if (wait)
3325 status = rpc_wait_for_completion_task(task);
b39e625b 3326 rpc_put_task(task);
a49c3c77 3327 return status;
9512135d
TM		 3328out_free_calldata:
3329 kfree(calldata);
3330out:
b39e625b
TM		 3331 nfs4_put_open_state(state);
3332 nfs4_put_state_owner(sp);
9512135d 3333 return status;
1da177e4
LT		 3334}
3335
2b484297 3336static struct inode *
5bc2afc2
TM		 3337nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
3338 int open_flags, struct iattr *attr, int *opened)
1da177e4 3339{
1da177e4 3340 struct nfs4_state *state;
aa9c2669
DQ		 3341 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
3342
3343 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
1da177e4 3344
565277f6 3345 /* Protect against concurrent sillydeletes */
5bc2afc2 3346 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
aa9c2669
DQ		 3347
3348 nfs4_label_release_security(label);
3349
f46e0bd3
TM		 3350 if (IS_ERR(state))
3351 return ERR_CAST(state);
275bb307 3352 return state->inode;
1da177e4
LT		 3353}
3354
1185a552 3355static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 3356{
3357 if (ctx->state == NULL)
3358 return;
3359 if (is_sync)
643168c2 3360 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 3361 else
643168c2 3362 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 3363}
1da177e4 3364
b944dba3
TM		 3365#define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
3366#define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
dff25ddb 3367#define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_MODE_UMASK - 1UL)
b944dba3 3368
1da177e4
LT		 3369static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
3370{
8c61282f 3371 u32 bitmask[3] = {}, minorversion = server->nfs_client->cl_minorversion;
43652ad5
BH		 3372 struct nfs4_server_caps_arg args = {
3373 .fhandle = fhandle,
8c61282f 3374 .bitmask = bitmask,
43652ad5 3375 };
1da177e4
LT		 3376 struct nfs4_server_caps_res res = {};
3377 struct rpc_message msg = {
3378 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 3379 .rpc_argp = &args,
1da177e4
LT		 3380 .rpc_resp = &res,
3381 };
3382 int status;
3383
8c61282f
KM		 3384 bitmask[0] = FATTR4_WORD0_SUPPORTED_ATTRS |
3385 FATTR4_WORD0_FH_EXPIRE_TYPE |
3386 FATTR4_WORD0_LINK_SUPPORT |
3387 FATTR4_WORD0_SYMLINK_SUPPORT |
3388 FATTR4_WORD0_ACLSUPPORT;
3389 if (minorversion)
3390 bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3391
7c513058 3392 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3393 if (status == 0) {
b944dba3 3394 /* Sanity check the server answers */
8c61282f 3395 switch (minorversion) {
b944dba3
TM		 3396 case 0:
3397 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
3398 res.attr_bitmask[2] = 0;
3399 break;
3400 case 1:
3401 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
3402 break;
3403 case 2:
3404 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
3405 }
1da177e4 3406 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 3407 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
3408 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
3409 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
3410 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
b944dba3
TM		 3411 NFS_CAP_CTIME|NFS_CAP_MTIME|
3412 NFS_CAP_SECURITY_LABEL);
7dd7d959
MN		 3413 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
3414 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
1da177e4
LT		 3415 server->caps |= NFS_CAP_ACLS;
3416 if (res.has_links != 0)
3417 server->caps |= NFS_CAP_HARDLINKS;
3418 if (res.has_symlinks != 0)
3419 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 3420 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
3421 server->caps |= NFS_CAP_FILEID;
3422 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
3423 server->caps |= NFS_CAP_MODE;
3424 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
3425 server->caps |= NFS_CAP_NLINK;
3426 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
3427 server->caps |= NFS_CAP_OWNER;
3428 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
3429 server->caps |= NFS_CAP_OWNER_GROUP;
3430 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
3431 server->caps |= NFS_CAP_ATIME;
3432 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
3433 server->caps |= NFS_CAP_CTIME;
3434 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
3435 server->caps |= NFS_CAP_MTIME;
aa9c2669
DQ		 3436#ifdef CONFIG_NFS_V4_SECURITY_LABEL
3437 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
3438 server->caps |= NFS_CAP_SECURITY_LABEL;
3439#endif
3440 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
3441 sizeof(server->attr_bitmask));
b944dba3 3442 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
62ab460c 3443
a65318bf
TM		 3444 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
3445 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
3446 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
b944dba3 3447 server->cache_consistency_bitmask[2] = 0;
8c61282f
KM		 3448 memcpy(server->exclcreat_bitmask, res.exclcreat_bitmask,
3449 sizeof(server->exclcreat_bitmask));
1da177e4 3450 server->acl_bitmask = res.acl_bitmask;
264e6351 3451 server->fh_expire_type = res.fh_expire_type;
1da177e4 3452 }
cccef3b9 3453
1da177e4
LT		 3454 return status;
3455}
3456
55a97593 3457int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 3458{
3459 struct nfs4_exception exception = { };
3460 int err;
3461 do {
3462 err = nfs4_handle_exception(server,
3463 _nfs4_server_capabilities(server, fhandle),
3464 &exception);
3465 } while (exception.retry);
3466 return err;
3467}
3468
3469static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3470 struct nfs_fsinfo *info)
3471{
aa9c2669 3472 u32 bitmask[3];
1da177e4 3473 struct nfs4_lookup_root_arg args = {
aa9c2669 3474 .bitmask = bitmask,
1da177e4
LT		 3475 };
3476 struct nfs4_lookup_res res = {
3477 .server = server,
0e574af1 3478 .fattr = info->fattr,
1da177e4
LT		 3479 .fh = fhandle,
3480 };
3481 struct rpc_message msg = {
3482 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
3483 .rpc_argp = &args,
3484 .rpc_resp = &res,
3485 };
008f55d0 3486
aa9c2669
DQ		 3487 bitmask[0] = nfs4_fattr_bitmap[0];
3488 bitmask[1] = nfs4_fattr_bitmap[1];
3489 /*
3490 * Process the label in the upcoming getfattr
3491 */
3492 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
3493
0e574af1 3494 nfs_fattr_init(info->fattr);
7c513058 3495 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3496}
3497
3498static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3499 struct nfs_fsinfo *info)
3500{
3501 struct nfs4_exception exception = { };
3502 int err;
3503 do {
fb8a5ba8 3504 err = _nfs4_lookup_root(server, fhandle, info);
b5f875a9 3505 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
fb8a5ba8
BS		 3506 switch (err) {
3507 case 0:
3508 case -NFS4ERR_WRONGSEC:
05e9cfb4 3509 goto out;
fb8a5ba8
BS		 3510 default:
3511 err = nfs4_handle_exception(server, err, &exception);
3512 }
1da177e4 3513 } while (exception.retry);
05e9cfb4 3514out:
1da177e4
LT		 3515 return err;
3516}
3517
8f70e95f
BS		 3518static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3519 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
3520{
c2190661
TM		 3521 struct rpc_auth_create_args auth_args = {
3522 .pseudoflavor = flavor,
3523 };
8f70e95f
BS		 3524 struct rpc_auth *auth;
3525 int ret;
3526
c2190661 3527 auth = rpcauth_create(&auth_args, server->client);
e8d920c5 3528 if (IS_ERR(auth)) {
75bc8821 3529 ret = -EACCES;
8f70e95f
BS		 3530 goto out;
3531 }
3532 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 3533out:
3534 return ret;
3535}
3536
9a744ba3
CL		 3537/*
3538 * Retry pseudoroot lookup with various security flavors. We do this when:
3539 *
3540 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
3541 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
3542 *
3543 * Returns zero on success, or a negative NFS4ERR value, or a
3544 * negative errno value.
3545 */
801a16dc 3546static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 3547 struct nfs_fsinfo *info)
1da177e4 3548{
9a744ba3
CL		 3549 /* Per 3530bis 15.33.5 */
3550 static const rpc_authflavor_t flav_array[] = {
3551 RPC_AUTH_GSS_KRB5P,
3552 RPC_AUTH_GSS_KRB5I,
3553 RPC_AUTH_GSS_KRB5,
c4eafe11 3554 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 3555 RPC_AUTH_NULL,
3556 };
3557 int status = -EPERM;
3558 size_t i;
6a1a1e34 3559
4d4b69dd
WAA		 3560 if (server->auth_info.flavor_len > 0) {
3561 /* try each flavor specified by user */
3562 for (i = 0; i < server->auth_info.flavor_len; i++) {
3563 status = nfs4_lookup_root_sec(server, fhandle, info,
3564 server->auth_info.flavors[i]);
3565 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3566 continue;
3567 break;
3568 }
3569 } else {
3570 /* no flavors specified by user, try default list */
3571 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3572 status = nfs4_lookup_root_sec(server, fhandle, info,
3573 flav_array[i]);
3574 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3575 continue;
3576 break;
3577 }
8f70e95f 3578 }
9a744ba3 3579
fb8a5ba8
BS		 3580 /*
3581 * -EACCESS could mean that the user doesn't have correct permissions
3582 * to access the mount. It could also mean that we tried to mount
3583 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
3584 * existing mount programs don't handle -EACCES very well so it should
3585 * be mapped to -EPERM instead.
3586 */
3587 if (status == -EACCES)
3588 status = -EPERM;
801a16dc
BS		 3589 return status;
3590}
3591
2ed4b95b
CL		 3592/**
3593 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
3594 * @server: initialized nfs_server handle
3595 * @fhandle: we fill in the pseudo-fs root file handle
3596 * @info: we fill in an FSINFO struct
5e6b1990 3597 * @auth_probe: probe the auth flavours
2ed4b95b
CL		 3598 *
3599 * Returns zero on success, or a negative errno.
801a16dc 3600 */
3028eb2b 3601int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
5e6b1990
TM		 3602 struct nfs_fsinfo *info,
3603 bool auth_probe)
801a16dc 3604{
c7757074 3605 int status = 0;
2ed4b95b 3606
c7757074 3607 if (!auth_probe)
5e6b1990 3608 status = nfs4_lookup_root(server, fhandle, info);
c7757074
AP		 3609
3610 if (auth_probe || status == NFS4ERR_WRONGSEC)
698c937b
TM		 3611 status = server->nfs_client->cl_mvops->find_root_sec(server,
3612 fhandle, info);
2ed4b95b 3613
1da177e4
LT		 3614 if (status == 0)
3615 status = nfs4_server_capabilities(server, fhandle);
3616 if (status == 0)
3617 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 3618
c12e87f4 3619 return nfs4_map_errors(status);
1da177e4
LT		 3620}
3621
bae36241
BS		 3622static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3623 struct nfs_fsinfo *info)
3624{
3625 int error;
3626 struct nfs_fattr *fattr = info->fattr;
1775fd3e 3627 struct nfs4_label *label = NULL;
bae36241
BS		 3628
3629 error = nfs4_server_capabilities(server, mntfh);
3630 if (error < 0) {
3631 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3632 return error;
3633 }
3634
14c43f76
DQ		 3635 label = nfs4_label_alloc(server, GFP_KERNEL);
3636 if (IS_ERR(label))
3637 return PTR_ERR(label);
3638
1775fd3e 3639 error = nfs4_proc_getattr(server, mntfh, fattr, label);
bae36241
BS		 3640 if (error < 0) {
3641 dprintk("nfs4_get_root: getattr error = %d\n", -error);
14c43f76 3642 goto err_free_label;
bae36241
BS		 3643 }
3644
3645 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3646 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3647 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3648
14c43f76
DQ		 3649err_free_label:
3650 nfs4_label_free(label);
3651
bae36241
BS		 3652 return error;
3653}
3654
6b97fd3d
MN		 3655/*
3656 * Get locations and (maybe) other attributes of a referral.
3657 * Note that we'll actually follow the referral later when
3658 * we detect fsid mismatch in inode revalidation
3659 */
f05d147f
BS		 3660static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3661 const struct qstr *name, struct nfs_fattr *fattr,
3662 struct nfs_fh *fhandle)
6b97fd3d
MN		 3663{
3664 int status = -ENOMEM;
3665 struct page *page = NULL;
3666 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 3667
3668 page = alloc_page(GFP_KERNEL);
3669 if (page == NULL)
3670 goto out;
3671 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3672 if (locations == NULL)
3673 goto out;
3674
f05d147f 3675 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 3676 if (status != 0)
3677 goto out;
519ae255
CL		 3678
3679 /*
3680 * If the fsid didn't change, this is a migration event, not a
3681 * referral. Cause us to drop into the exception handler, which
3682 * will kick off migration recovery.
3683 */
6b97fd3d 3684 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 3685 dprintk("%s: server did not return a different fsid for"
3686 " a referral at %s\n", __func__, name->name);
519ae255 3687 status = -NFS4ERR_MOVED;
6b97fd3d
MN		 3688 goto out;
3689 }
533eb461
AA		 3690 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3691 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 3692
533eb461 3693 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 3694 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 3695 memset(fhandle, 0, sizeof(struct nfs_fh));
3696out:
3697 if (page)
3698 __free_page(page);
5d7ca35a 3699 kfree(locations);
6b97fd3d
MN		 3700 return status;
3701}
3702
1775fd3e
DQ		 3703static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3704 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3705{
3706 struct nfs4_getattr_arg args = {
3707 .fh = fhandle,
3708 .bitmask = server->attr_bitmask,
3709 };
3710 struct nfs4_getattr_res res = {
3711 .fattr = fattr,
1775fd3e 3712 .label = label,
1da177e4
LT		 3713 .server = server,
3714 };
3715 struct rpc_message msg = {
3716 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3717 .rpc_argp = &args,
3718 .rpc_resp = &res,
3719 };
aa9c2669
DQ		 3720
3721 args.bitmask = nfs4_bitmask(server, label);
3722
0e574af1 3723 nfs_fattr_init(fattr);
7c513058 3724 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3725}
3726
1775fd3e
DQ		 3727static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3728 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3729{
3730 struct nfs4_exception exception = { };
3731 int err;
3732 do {
b5f875a9
TM		 3733 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3734 trace_nfs4_getattr(server, fhandle, fattr, err);
3735 err = nfs4_handle_exception(server, err,
1da177e4
LT		 3736 &exception);
3737 } while (exception.retry);
3738 return err;
3739}
3740
3741/*
3742 * The file is not closed if it is opened due to the a request to change
3743 * the size of the file. The open call will not be needed once the
3744 * VFS layer lookup-intents are implemented.
3745 *
3746 * Close is called when the inode is destroyed.
3747 * If we haven't opened the file for O_WRONLY, we
3748 * need to in the size_change case to obtain a stateid.
3749 *
3750 * Got race?
3751 * Because OPEN is always done by name in nfsv4, it is
3752 * possible that we opened a different file by the same
3753 * name. We can recognize this race condition, but we
3754 * can't do anything about it besides returning an error.
3755 *
3756 * This will be fixed with VFS changes (lookup-intent).
3757 */
3758static int
3759nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3760 struct iattr *sattr)
3761{
2b0143b5 3762 struct inode *inode = d_inode(dentry);
659bfcd6 3763 struct rpc_cred *cred = NULL;
29b59f94 3764 struct nfs_open_context *ctx = NULL;
14c43f76 3765 struct nfs4_label *label = NULL;
1da177e4
LT		 3766 int status;
3767
88ac815c
PT		 3768 if (pnfs_ld_layoutret_on_setattr(inode) &&
3769 sattr->ia_valid & ATTR_SIZE &&
3770 sattr->ia_size < i_size_read(inode))
24028672 3771 pnfs_commit_and_return_layout(inode);
8a1636c4 3772
0e574af1 3773 nfs_fattr_init(fattr);
1da177e4 3774
2669940d
AA		 3775 /* Deal with open(O_TRUNC) */
3776 if (sattr->ia_valid & ATTR_OPEN)
cc7936f9 3777 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2669940d
AA		 3778
3779 /* Optimization: if the end result is no change, don't RPC */
cc7936f9 3780 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2669940d
AA		 3781 return 0;
3782
d530838b 3783 /* Search for an existing open(O_WRITE) file */
659bfcd6 3784 if (sattr->ia_valid & ATTR_FILE) {
659bfcd6
TM		 3785
3786 ctx = nfs_file_open_context(sattr->ia_file);
29b59f94 3787 if (ctx)
504e5189 3788 cred = ctx->cred;
659bfcd6 3789 }
08e9eac4 3790
14c43f76
DQ		 3791 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3792 if (IS_ERR(label))
3793 return PTR_ERR(label);
3794
29b59f94 3795 status = nfs4_do_setattr(inode, cred, fattr, sattr, ctx, NULL, label);
aa9c2669 3796 if (status == 0) {
f044636d 3797 nfs_setattr_update_inode(inode, sattr, fattr);
aa9c2669
DQ		 3798 nfs_setsecurity(inode, fattr, label);
3799 }
14c43f76 3800 nfs4_label_free(label);
1da177e4
LT		 3801 return status;
3802}
3803
0c2e53f1
TM		 3804static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3805 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3806 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 3807{
0c2e53f1 3808 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 3809 int status;
3810 struct nfs4_lookup_arg args = {
3811 .bitmask = server->attr_bitmask,
0c2e53f1 3812 .dir_fh = NFS_FH(dir),
2b3de441
DH		 3813 .name = name,
3814 };
3815 struct nfs4_lookup_res res = {
3816 .server = server,
3817 .fattr = fattr,
aa9c2669 3818 .label = label,
2b3de441
DH		 3819 .fh = fhandle,
3820 };
3821 struct rpc_message msg = {
3822 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3823 .rpc_argp = &args,
3824 .rpc_resp = &res,
3825 };
3826
aa9c2669
DQ		 3827 args.bitmask = nfs4_bitmask(server, label);
3828
2b3de441
DH		 3829 nfs_fattr_init(fattr);
3830
1da177e4 3831 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 3832 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3833 dprintk("NFS reply lookup: %d\n", status);
3834 return status;
3835}
3836
72de53ec 3837static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 3838{
7ebb9315 3839 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 3840 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 3841 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3842 fattr->nlink = 2;
3843}
3844
72de53ec 3845static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
beffb8fe 3846 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3847 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3848{
3849 struct nfs4_exception exception = { };
72de53ec 3850 struct rpc_clnt *client = *clnt;
1da177e4
LT		 3851 int err;
3852 do {
1775fd3e 3853 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
078ea3df 3854 trace_nfs4_lookup(dir, name, err);
72de53ec 3855 switch (err) {
08ef7bd3 3856 case -NFS4ERR_BADNAME:
72de53ec
BS		 3857 err = -ENOENT;
3858 goto out;
0c2e53f1 3859 case -NFS4ERR_MOVED:
f05d147f 3860 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
c86c90c6
DM		 3861 if (err == -NFS4ERR_MOVED)
3862 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
72de53ec 3863 goto out;
0c2e53f1 3864 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 3865 err = -EPERM;
3866 if (client != *clnt)
3867 goto out;
66b06860 3868 client = nfs4_negotiate_security(client, dir, name);
72de53ec
BS		 3869 if (IS_ERR(client))
3870 return PTR_ERR(client);
3871
3872 exception.retry = 1;
3873 break;
3874 default:
3875 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 3876 }
1da177e4 3877 } while (exception.retry);
72de53ec
BS		 3878
3879out:
3880 if (err == 0)
3881 *clnt = client;
3882 else if (client != *clnt)
3883 rpc_shutdown_client(client);
3884
1da177e4
LT		 3885 return err;
3886}
3887
beffb8fe 3888static int nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1775fd3e
DQ		 3889 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3890 struct nfs4_label *label)
72de53ec
BS		 3891{
3892 int status;
3893 struct rpc_clnt *client = NFS_CLIENT(dir);
3894
1775fd3e 3895 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
72de53ec
BS		 3896 if (client != NFS_CLIENT(dir)) {
3897 rpc_shutdown_client(client);
3898 nfs_fixup_secinfo_attributes(fattr);
3899 }
3900 return status;
3901}
3902
f05d147f 3903struct rpc_clnt *
beffb8fe 3904nfs4_proc_lookup_mountpoint(struct inode *dir, const struct qstr *name,
f05d147f
BS		 3905 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3906{
b72888cb 3907 struct rpc_clnt *client = NFS_CLIENT(dir);
f05d147f 3908 int status;
f05d147f 3909
1775fd3e 3910 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
b72888cb 3911 if (status < 0)
f05d147f 3912 return ERR_PTR(status);
b72888cb 3913 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
f05d147f
BS		 3914}
3915
1da177e4
LT		 3916static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3917{
76b32999 3918 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3919 struct nfs4_accessargs args = {
3920 .fh = NFS_FH(inode),
a4980e78 3921 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 3922 };
3923 struct nfs4_accessres res = {
3924 .server = server,
1da177e4 3925 };
1da177e4
LT		 3926 struct rpc_message msg = {
3927 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3928 .rpc_argp = &args,
3929 .rpc_resp = &res,
3930 .rpc_cred = entry->cred,
3931 };
3932 int mode = entry->mask;
aa9c2669 3933 int status = 0;
1da177e4
LT		 3934
3935 /*
3936 * Determine which access bits we want to ask for...
3937 */
3938 if (mode & MAY_READ)
3939 args.access |= NFS4_ACCESS_READ;
3940 if (S_ISDIR(inode->i_mode)) {
3941 if (mode & MAY_WRITE)
3942 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3943 if (mode & MAY_EXEC)
3944 args.access |= NFS4_ACCESS_LOOKUP;
3945 } else {
3946 if (mode & MAY_WRITE)
3947 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3948 if (mode & MAY_EXEC)
3949 args.access |= NFS4_ACCESS_EXECUTE;
3950 }
c407d41a
TM		 3951
3952 res.fattr = nfs_alloc_fattr();
3953 if (res.fattr == NULL)
3954 return -ENOMEM;
3955
7c513058 3956 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3957 if (!status) {
6168f62c 3958 nfs_access_set_mask(entry, res.access);
c407d41a 3959 nfs_refresh_inode(inode, res.fattr);
1da177e4 3960 }
c407d41a 3961 nfs_free_fattr(res.fattr);
1da177e4
LT		 3962 return status;
3963}
3964
3965static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3966{
3967 struct nfs4_exception exception = { };
3968 int err;
3969 do {
c1578b76
TM		 3970 err = _nfs4_proc_access(inode, entry);
3971 trace_nfs4_access(inode, err);
3972 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3973 &exception);
3974 } while (exception.retry);
3975 return err;
3976}
3977
3978/*
3979 * TODO: For the time being, we don't try to get any attributes
3980 * along with any of the zero-copy operations READ, READDIR,
3981 * READLINK, WRITE.
3982 *
3983 * In the case of the first three, we want to put the GETATTR
3984 * after the read-type operation -- this is because it is hard
3985 * to predict the length of a GETATTR response in v4, and thus
3986 * align the READ data correctly. This means that the GETATTR
3987 * may end up partially falling into the page cache, and we should
3988 * shift it into the 'tail' of the xdr_buf before processing.
3989 * To do this efficiently, we need to know the total length
3990 * of data received, which doesn't seem to be available outside
3991 * of the RPC layer.
3992 *
3993 * In the case of WRITE, we also want to put the GETATTR after
3994 * the operation -- in this case because we want to make sure
140150db 3995 * we get the post-operation mtime and size.
1da177e4
LT		 3996 *
3997 * Both of these changes to the XDR layer would in fact be quite
3998 * minor, but I decided to leave them for a subsequent patch.
3999 */
4000static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
4001 unsigned int pgbase, unsigned int pglen)
4002{
4003 struct nfs4_readlink args = {
4004 .fh = NFS_FH(inode),
4005 .pgbase = pgbase,
4006 .pglen = pglen,
4007 .pages = &page,
4008 };
f50c7000 4009 struct nfs4_readlink_res res;
1da177e4
LT		 4010 struct rpc_message msg = {
4011 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
4012 .rpc_argp = &args,
f50c7000 4013 .rpc_resp = &res,
1da177e4
LT		 4014 };
4015
7c513058 4016 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4017}
4018
4019static int nfs4_proc_readlink(struct inode *inode, struct page *page,
4020 unsigned int pgbase, unsigned int pglen)
4021{
4022 struct nfs4_exception exception = { };
4023 int err;
4024 do {
c1578b76
TM		 4025 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
4026 trace_nfs4_readlink(inode, err);
4027 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 4028 &exception);
4029 } while (exception.retry);
4030 return err;
4031}
4032
1da177e4 4033/*
8867fe58 4034 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 4035 */
1da177e4
LT		 4036static int
4037nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 4038 int flags)
1da177e4 4039{
dff25ddb 4040 struct nfs_server *server = NFS_SERVER(dir);
aa9c2669 4041 struct nfs4_label l, *ilabel = NULL;
8867fe58 4042 struct nfs_open_context *ctx;
1da177e4 4043 struct nfs4_state *state;
1da177e4
LT		 4044 int status = 0;
4045
532d4def 4046 ctx = alloc_nfs_open_context(dentry, FMODE_READ, NULL);
8867fe58
MS		 4047 if (IS_ERR(ctx))
4048 return PTR_ERR(ctx);
4049
aa9c2669
DQ		 4050 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
4051
dff25ddb
AG		 4052 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
4053 sattr->ia_mode &= ~current_umask();
c5c3fb5f 4054 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, NULL);
1da177e4
LT		 4055 if (IS_ERR(state)) {
4056 status = PTR_ERR(state);
c0204fd2 4057 goto out;
1da177e4 4058 }
1da177e4 4059out:
aa9c2669 4060 nfs4_label_release_security(ilabel);
8867fe58 4061 put_nfs_open_context(ctx);
1da177e4
LT		 4062 return status;
4063}
4064
beffb8fe 4065static int _nfs4_proc_remove(struct inode *dir, const struct qstr *name)
1da177e4 4066{
16e42959 4067 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 4068 struct nfs_removeargs args = {
1da177e4 4069 .fh = NFS_FH(dir),
26fe5750 4070 .name = *name,
16e42959 4071 };
4fdc17b2 4072 struct nfs_removeres res = {
16e42959 4073 .server = server,
1da177e4 4074 };
1da177e4 4075 struct rpc_message msg = {
4fdc17b2
TM		 4076 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
4077 .rpc_argp = &args,
4078 .rpc_resp = &res,
1da177e4 4079 };
d3129ef6 4080 unsigned long timestamp = jiffies;
778d2817 4081 int status;
1da177e4 4082
7c513058 4083 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 4084 if (status == 0)
d3129ef6 4085 update_changeattr(dir, &res.cinfo, timestamp);
1da177e4
LT		 4086 return status;
4087}
4088
beffb8fe 4089static int nfs4_proc_remove(struct inode *dir, const struct qstr *name)
1da177e4
LT		 4090{
4091 struct nfs4_exception exception = { };
4092 int err;
4093 do {
078ea3df
TM		 4094 err = _nfs4_proc_remove(dir, name);
4095 trace_nfs4_remove(dir, name, err);
4096 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4097 &exception);
4098 } while (exception.retry);
4099 return err;
4100}
4101
e4eff1a6 4102static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 4103{
e4eff1a6
TM		 4104 struct nfs_server *server = NFS_SERVER(dir);
4105 struct nfs_removeargs *args = msg->rpc_argp;
4106 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 4107
e4eff1a6 4108 res->server = server;
1da177e4 4109 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
a9c92d6b 4110 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
aa9c2669
DQ		 4111
4112 nfs_fattr_init(res->dir_attr);
1da177e4
LT		 4113}
4114
34e137cc
BS		 4115static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
4116{
884be175 4117 nfs4_setup_sequence(NFS_SB(data->dentry->d_sb),
d9afbd1b
TM		 4118 &data->args.seq_args,
4119 &data->res.seq_res,
4120 task);
1da177e4
LT		 4121}
4122
e4eff1a6 4123static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 4124{
078ea3df
TM		 4125 struct nfs_unlinkdata *data = task->tk_calldata;
4126 struct nfs_removeres *res = &data->res;
e4eff1a6 4127
14516c3a
TM		 4128 if (!nfs4_sequence_done(task, &res->seq_res))
4129 return 0;
8478eaa1
N		 4130 if (nfs4_async_handle_error(task, res->server, NULL,
4131 &data->timeout) == -EAGAIN)
e4eff1a6 4132 return 0;
c40d52fe 4133 if (task->tk_status == 0)
d3129ef6 4134 update_changeattr(dir, &res->cinfo, res->dir_attr->time_start);
e4eff1a6 4135 return 1;
1da177e4
LT		 4136}
4137
d3d4152a
JL		 4138static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
4139{
4140 struct nfs_server *server = NFS_SERVER(dir);
4141 struct nfs_renameargs *arg = msg->rpc_argp;
4142 struct nfs_renameres *res = msg->rpc_resp;
4143
4144 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 4145 res->server = server;
a9c92d6b 4146 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 4147}
4148
c6bfa1a1
BS		 4149static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
4150{
d9afbd1b
TM		 4151 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
4152 &data->args.seq_args,
4153 &data->res.seq_res,
4154 task);
d3d4152a
JL		 4155}
4156
4157static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
4158 struct inode *new_dir)
4159{
fbc6f7c2
TM		 4160 struct nfs_renamedata *data = task->tk_calldata;
4161 struct nfs_renameres *res = &data->res;
d3d4152a
JL		 4162
4163 if (!nfs4_sequence_done(task, &res->seq_res))
4164 return 0;
8478eaa1 4165 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
d3d4152a
JL		 4166 return 0;
4167
c733c49c 4168 if (task->tk_status == 0) {
d3129ef6 4169 update_changeattr(old_dir, &res->old_cinfo, res->old_fattr->time_start);
c733c49c 4170 if (new_dir != old_dir)
d3129ef6 4171 update_changeattr(new_dir, &res->new_cinfo, res->new_fattr->time_start);
c733c49c 4172 }
d3d4152a
JL		 4173 return 1;
4174}
4175
beffb8fe 4176static int _nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name)
1da177e4 4177{
91ba2eee 4178 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 4179 struct nfs4_link_arg arg = {
4180 .fh = NFS_FH(inode),
4181 .dir_fh = NFS_FH(dir),
4182 .name = name,
91ba2eee
TM		 4183 .bitmask = server->attr_bitmask,
4184 };
91ba2eee
TM		 4185 struct nfs4_link_res res = {
4186 .server = server,
1775fd3e 4187 .label = NULL,
1da177e4 4188 };
1da177e4
LT		 4189 struct rpc_message msg = {
4190 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
4191 .rpc_argp = &arg,
91ba2eee 4192 .rpc_resp = &res,
1da177e4 4193 };
136f2627
TM		 4194 int status = -ENOMEM;
4195
4196 res.fattr = nfs_alloc_fattr();
778d2817 4197 if (res.fattr == NULL)
136f2627 4198 goto out;
1da177e4 4199
14c43f76
DQ		 4200 res.label = nfs4_label_alloc(server, GFP_KERNEL);
4201 if (IS_ERR(res.label)) {
4202 status = PTR_ERR(res.label);
4203 goto out;
4204 }
aa9c2669 4205 arg.bitmask = nfs4_bitmask(server, res.label);
14c43f76 4206
7c513058 4207 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee 4208 if (!status) {
d3129ef6 4209 update_changeattr(dir, &res.cinfo, res.fattr->time_start);
aa9c2669
DQ		 4210 status = nfs_post_op_update_inode(inode, res.fattr);
4211 if (!status)
4212 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 4213 }
14c43f76
DQ		 4214
4215
4216 nfs4_label_free(res.label);
4217
136f2627 4218out:
136f2627 4219 nfs_free_fattr(res.fattr);
1da177e4
LT		 4220 return status;
4221}
4222
beffb8fe 4223static int nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name)
1da177e4
LT		 4224{
4225 struct nfs4_exception exception = { };
4226 int err;
4227 do {
4228 err = nfs4_handle_exception(NFS_SERVER(inode),
4229 _nfs4_proc_link(inode, dir, name),
4230 &exception);
4231 } while (exception.retry);
4232 return err;
4233}
4234
57dc9a57
TM		 4235struct nfs4_createdata {
4236 struct rpc_message msg;
4237 struct nfs4_create_arg arg;
4238 struct nfs4_create_res res;
4239 struct nfs_fh fh;
4240 struct nfs_fattr fattr;
1775fd3e 4241 struct nfs4_label *label;
57dc9a57
TM		 4242};
4243
4244static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
beffb8fe 4245 const struct qstr *name, struct iattr *sattr, u32 ftype)
57dc9a57
TM		 4246{
4247 struct nfs4_createdata *data;
4248
4249 data = kzalloc(sizeof(*data), GFP_KERNEL);
4250 if (data != NULL) {
4251 struct nfs_server *server = NFS_SERVER(dir);
4252
14c43f76
DQ		 4253 data->label = nfs4_label_alloc(server, GFP_KERNEL);
4254 if (IS_ERR(data->label))
4255 goto out_free;
4256
57dc9a57
TM		 4257 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
4258 data->msg.rpc_argp = &data->arg;
4259 data->msg.rpc_resp = &data->res;
4260 data->arg.dir_fh = NFS_FH(dir);
4261 data->arg.server = server;
4262 data->arg.name = name;
4263 data->arg.attrs = sattr;
4264 data->arg.ftype = ftype;
aa9c2669 4265 data->arg.bitmask = nfs4_bitmask(server, data->label);
dff25ddb 4266 data->arg.umask = current_umask();
57dc9a57
TM		 4267 data->res.server = server;
4268 data->res.fh = &data->fh;
4269 data->res.fattr = &data->fattr;
1775fd3e 4270 data->res.label = data->label;
57dc9a57 4271 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 4272 }
4273 return data;
14c43f76
DQ		 4274out_free:
4275 kfree(data);
4276 return NULL;
57dc9a57
TM		 4277}
4278
4279static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
4280{
7c513058 4281 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 4282 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57 4283 if (status == 0) {
d3129ef6
TM		 4284 update_changeattr(dir, &data->res.dir_cinfo,
4285 data->res.fattr->time_start);
1775fd3e 4286 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 4287 }
4288 return status;
4289}
4290
4291static void nfs4_free_createdata(struct nfs4_createdata *data)
4292{
14c43f76 4293 nfs4_label_free(data->label);
57dc9a57
TM		 4294 kfree(data);
4295}
4296
4f390c15 4297static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 4298 struct page *page, unsigned int len, struct iattr *sattr,
4299 struct nfs4_label *label)
1da177e4 4300{
57dc9a57
TM		 4301 struct nfs4_createdata *data;
4302 int status = -ENAMETOOLONG;
1da177e4 4303
94a6d753 4304 if (len > NFS4_MAXPATHLEN)
57dc9a57 4305 goto out;
4f390c15 4306
57dc9a57
TM		 4307 status = -ENOMEM;
4308 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
4309 if (data == NULL)
4310 goto out;
4311
4312 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
4313 data->arg.u.symlink.pages = &page;
4314 data->arg.u.symlink.len = len;
1775fd3e 4315 data->arg.label = label;
1da177e4 4316
57dc9a57
TM		 4317 status = nfs4_do_create(dir, dentry, data);
4318
4319 nfs4_free_createdata(data);
4320out:
1da177e4
LT		 4321 return status;
4322}
4323
4f390c15 4324static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 4325 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 4326{
4327 struct nfs4_exception exception = { };
aa9c2669 4328 struct nfs4_label l, *label = NULL;
1da177e4 4329 int err;
aa9c2669
DQ		 4330
4331 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4332
1da177e4 4333 do {
078ea3df
TM		 4334 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
4335 trace_nfs4_symlink(dir, &dentry->d_name, err);
4336 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4337 &exception);
4338 } while (exception.retry);
aa9c2669
DQ		 4339
4340 nfs4_label_release_security(label);
1da177e4
LT		 4341 return err;
4342}
4343
4344static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 4345 struct iattr *sattr, struct nfs4_label *label)
1da177e4 4346{
57dc9a57
TM		 4347 struct nfs4_createdata *data;
4348 int status = -ENOMEM;
1da177e4 4349
57dc9a57
TM		 4350 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
4351 if (data == NULL)
4352 goto out;
4353
1775fd3e 4354 data->arg.label = label;
57dc9a57
TM		 4355 status = nfs4_do_create(dir, dentry, data);
4356
4357 nfs4_free_createdata(data);
4358out:
1da177e4
LT		 4359 return status;
4360}
4361
4362static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
4363 struct iattr *sattr)
4364{
dff25ddb 4365 struct nfs_server *server = NFS_SERVER(dir);
1da177e4 4366 struct nfs4_exception exception = { };
aa9c2669 4367 struct nfs4_label l, *label = NULL;
1da177e4 4368 int err;
a8a5da99 4369
aa9c2669
DQ		 4370 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4371
dff25ddb
AG		 4372 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
4373 sattr->ia_mode &= ~current_umask();
1da177e4 4374 do {
078ea3df
TM		 4375 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
4376 trace_nfs4_mkdir(dir, &dentry->d_name, err);
4377 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4378 &exception);
4379 } while (exception.retry);
aa9c2669
DQ		 4380 nfs4_label_release_security(label);
4381
1da177e4
LT		 4382 return err;
4383}
4384
4385static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 4386 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4 4387{
2b0143b5 4388 struct inode *dir = d_inode(dentry);
1da177e4
LT		 4389 struct nfs4_readdir_arg args = {
4390 .fh = NFS_FH(dir),
56e4ebf8 4391 .pages = pages,
1da177e4
LT		 4392 .pgbase = 0,
4393 .count = count,
2b0143b5 4394 .bitmask = NFS_SERVER(d_inode(dentry))->attr_bitmask,
82f2e547 4395 .plus = plus,
1da177e4
LT		 4396 };
4397 struct nfs4_readdir_res res;
4398 struct rpc_message msg = {
4399 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
4400 .rpc_argp = &args,
4401 .rpc_resp = &res,
4402 .rpc_cred = cred,
4403 };
4404 int status;
4405
6de1472f
AV		 4406 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
4407 dentry,
eadf4598 4408 (unsigned long long)cookie);
c3f52af3 4409 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 4410 res.pgbase = args.pgbase;
7c513058 4411 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 4412 if (status >= 0) {
c3f52af3 4413 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 4414 status += args.pgbase;
4415 }
c4812998
TM		 4416
4417 nfs_invalidate_atime(dir);
4418
3110ff80 4419 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 4420 return status;
4421}
4422
4423static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 4424 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 4425{
4426 struct nfs4_exception exception = { };
4427 int err;
4428 do {
c1578b76
TM		 4429 err = _nfs4_proc_readdir(dentry, cred, cookie,
4430 pages, count, plus);
2b0143b5
DH		 4431 trace_nfs4_readdir(d_inode(dentry), err);
4432 err = nfs4_handle_exception(NFS_SERVER(d_inode(dentry)), err,
1da177e4
LT		 4433 &exception);
4434 } while (exception.retry);
4435 return err;
4436}
4437
4438static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 4439 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 4440{
57dc9a57
TM		 4441 struct nfs4_createdata *data;
4442 int mode = sattr->ia_mode;
4443 int status = -ENOMEM;
1da177e4 4444
57dc9a57
TM		 4445 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
4446 if (data == NULL)
4447 goto out;
4448
1da177e4 4449 if (S_ISFIFO(mode))
57dc9a57 4450 data->arg.ftype = NF4FIFO;
1da177e4 4451 else if (S_ISBLK(mode)) {
57dc9a57
TM		 4452 data->arg.ftype = NF4BLK;
4453 data->arg.u.device.specdata1 = MAJOR(rdev);
4454 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 4455 }
4456 else if (S_ISCHR(mode)) {
57dc9a57
TM		 4457 data->arg.ftype = NF4CHR;
4458 data->arg.u.device.specdata1 = MAJOR(rdev);
4459 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 4460 } else if (!S_ISSOCK(mode)) {
4461 status = -EINVAL;
4462 goto out_free;
1da177e4 4463 }
1775fd3e 4464
aa9c2669 4465 data->arg.label = label;
57dc9a57 4466 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 4467out_free:
57dc9a57
TM		 4468 nfs4_free_createdata(data);
4469out:
1da177e4
LT		 4470 return status;
4471}
4472
4473static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
4474 struct iattr *sattr, dev_t rdev)
4475{
dff25ddb 4476 struct nfs_server *server = NFS_SERVER(dir);
1da177e4 4477 struct nfs4_exception exception = { };
aa9c2669 4478 struct nfs4_label l, *label = NULL;
1da177e4 4479 int err;
a8a5da99 4480
aa9c2669
DQ		 4481 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4482
dff25ddb
AG		 4483 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
4484 sattr->ia_mode &= ~current_umask();
1da177e4 4485 do {
078ea3df
TM		 4486 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
4487 trace_nfs4_mknod(dir, &dentry->d_name, err);
4488 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4489 &exception);
4490 } while (exception.retry);
aa9c2669
DQ		 4491
4492 nfs4_label_release_security(label);
4493
1da177e4
LT		 4494 return err;
4495}
4496
4497static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
4498 struct nfs_fsstat *fsstat)
4499{
4500 struct nfs4_statfs_arg args = {
4501 .fh = fhandle,
4502 .bitmask = server->attr_bitmask,
4503 };
24ad148a
BH		 4504 struct nfs4_statfs_res res = {
4505 .fsstat = fsstat,
4506 };
1da177e4
LT		 4507 struct rpc_message msg = {
4508 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
4509 .rpc_argp = &args,
24ad148a 4510 .rpc_resp = &res,
1da177e4
LT		 4511 };
4512
0e574af1 4513 nfs_fattr_init(fsstat->fattr);
7c513058 4514 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4515}
4516
4517static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
4518{
4519 struct nfs4_exception exception = { };
4520 int err;
4521 do {
4522 err = nfs4_handle_exception(server,
4523 _nfs4_proc_statfs(server, fhandle, fsstat),
4524 &exception);
4525 } while (exception.retry);
4526 return err;
4527}
4528
4529static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
4530 struct nfs_fsinfo *fsinfo)
4531{
4532 struct nfs4_fsinfo_arg args = {
4533 .fh = fhandle,
4534 .bitmask = server->attr_bitmask,
4535 };
3dda5e43
BH		 4536 struct nfs4_fsinfo_res res = {
4537 .fsinfo = fsinfo,
4538 };
1da177e4
LT		 4539 struct rpc_message msg = {
4540 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
4541 .rpc_argp = &args,
3dda5e43 4542 .rpc_resp = &res,
1da177e4
LT		 4543 };
4544
7c513058 4545 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4546}
4547
4548static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4549{
4550 struct nfs4_exception exception = { };
83ca7f5a 4551 unsigned long now = jiffies;
1da177e4
LT		 4552 int err;
4553
4554 do {
83ca7f5a 4555 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
b5f875a9 4556 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
83ca7f5a 4557 if (err == 0) {
fb10fb67
TM		 4558 nfs4_set_lease_period(server->nfs_client,
4559 fsinfo->lease_time * HZ,
4560 now);
83ca7f5a
CL		 4561 break;
4562 }
4563 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 4564 } while (exception.retry);
4565 return err;
4566}
4567
4568static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4569{
e38eb650
BS		 4570 int error;
4571
0e574af1 4572 nfs_fattr_init(fsinfo->fattr);
e38eb650 4573 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 4574 if (error == 0) {
4575 /* block layout checks this! */
4576 server->pnfs_blksize = fsinfo->blksize;
ca440c38 4577 set_pnfs_layoutdriver(server, fhandle, fsinfo);
dc182549 4578 }
e38eb650
BS		 4579
4580 return error;
1da177e4
LT		 4581}
4582
4583static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4584 struct nfs_pathconf *pathconf)
4585{
4586 struct nfs4_pathconf_arg args = {
4587 .fh = fhandle,
4588 .bitmask = server->attr_bitmask,
4589 };
d45b2989
BH		 4590 struct nfs4_pathconf_res res = {
4591 .pathconf = pathconf,
4592 };
1da177e4
LT		 4593 struct rpc_message msg = {
4594 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
4595 .rpc_argp = &args,
d45b2989 4596 .rpc_resp = &res,
1da177e4
LT		 4597 };
4598
4599 /* None of the pathconf attributes are mandatory to implement */
4600 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
4601 memset(pathconf, 0, sizeof(*pathconf));
4602 return 0;
4603 }
4604
0e574af1 4605 nfs_fattr_init(pathconf->fattr);
7c513058 4606 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4607}
4608
4609static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4610 struct nfs_pathconf *pathconf)
4611{
4612 struct nfs4_exception exception = { };
4613 int err;
4614
4615 do {
4616 err = nfs4_handle_exception(server,
4617 _nfs4_proc_pathconf(server, fhandle, pathconf),
4618 &exception);
4619 } while (exception.retry);
4620 return err;
4621}
4622
5521abfd 4623int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 4624 const struct nfs_open_context *ctx,
4625 const struct nfs_lock_context *l_ctx,
4626 fmode_t fmode)
4627{
17393475 4628 return nfs4_select_rw_stateid(ctx->state, fmode, l_ctx, stateid, NULL);
9b206149
TM		 4629}
4630EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4631
5521abfd
TM		 4632static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4633 const struct nfs_open_context *ctx,
4634 const struct nfs_lock_context *l_ctx,
4635 fmode_t fmode)
4636{
4637 nfs4_stateid current_stateid;
4638
e1253be0
TM		 4639 /* If the current stateid represents a lost lock, then exit */
4640 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode) == -EIO)
4641 return true;
5521abfd
TM		 4642 return nfs4_stateid_match(stateid, &current_stateid);
4643}
4644
4645static bool nfs4_error_stateid_expired(int err)
4646{
4647 switch (err) {
4648 case -NFS4ERR_DELEG_REVOKED:
4649 case -NFS4ERR_ADMIN_REVOKED:
4650 case -NFS4ERR_BAD_STATEID:
4651 case -NFS4ERR_STALE_STATEID:
4652 case -NFS4ERR_OLD_STATEID:
4653 case -NFS4ERR_OPENMODE:
4654 case -NFS4ERR_EXPIRED:
4655 return true;
4656 }
4657 return false;
4658}
4659
d45f60c6 4660static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
1da177e4 4661{
d45f60c6 4662 struct nfs_server *server = NFS_SERVER(hdr->inode);
1da177e4 4663
d45f60c6 4664 trace_nfs4_read(hdr, task->tk_status);
9c27869d
TM		 4665 if (task->tk_status < 0) {
4666 struct nfs4_exception exception = {
4667 .inode = hdr->inode,
4668 .state = hdr->args.context->state,
4669 .stateid = &hdr->args.stateid,
4670 };
4671 task->tk_status = nfs4_async_handle_exception(task,
4672 server, task->tk_status, &exception);
4673 if (exception.retry) {
4674 rpc_restart_call_prepare(task);
4675 return -EAGAIN;
4676 }
1da177e4 4677 }
8850df99 4678
1da177e4 4679 if (task->tk_status > 0)
d45f60c6 4680 renew_lease(server, hdr->timestamp);
ec06c096 4681 return 0;
1da177e4
LT		 4682}
4683
5521abfd 4684static bool nfs4_read_stateid_changed(struct rpc_task *task,
3c6b899c 4685 struct nfs_pgio_args *args)
5521abfd
TM		 4686{
4687
4688 if (!nfs4_error_stateid_expired(task->tk_status) ||
4689 nfs4_stateid_is_current(&args->stateid,
4690 args->context,
4691 args->lock_context,
4692 FMODE_READ))
4693 return false;
4694 rpc_restart_call_prepare(task);
4695 return true;
4696}
4697
d45f60c6 4698static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
cbdabc7f
AA		 4699{
4700
4701 dprintk("--> %s\n", __func__);
4702
d45f60c6 4703 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
cbdabc7f 4704 return -EAGAIN;
d45f60c6 4705 if (nfs4_read_stateid_changed(task, &hdr->args))
5521abfd 4706 return -EAGAIN;
bfc505de
TM		 4707 if (task->tk_status > 0)
4708 nfs_invalidate_atime(hdr->inode);
d45f60c6
WAA		 4709 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4710 nfs4_read_done_cb(task, hdr);
cbdabc7f
AA		 4711}
4712
d45f60c6
WAA		 4713static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
4714 struct rpc_message *msg)
1da177e4 4715{
d45f60c6 4716 hdr->timestamp = jiffies;
ca857cc1
TM		 4717 if (!hdr->pgio_done_cb)
4718 hdr->pgio_done_cb = nfs4_read_done_cb;
bdc7f021 4719 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
d45f60c6 4720 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
1da177e4
LT		 4721}
4722
d45f60c6
WAA		 4723static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
4724 struct nfs_pgio_header *hdr)
ea7c3303 4725{
d45f60c6
WAA		 4726 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode),
4727 &hdr->args.seq_args,
4728 &hdr->res.seq_res,
9b206149 4729 task))
ef1820f9 4730 return 0;
d45f60c6
WAA		 4731 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
4732 hdr->args.lock_context,
4733 hdr->rw_ops->rw_mode) == -EIO)
ef1820f9 4734 return -EIO;
d45f60c6 4735 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
ef1820f9
N		 4736 return -EIO;
4737 return 0;
1da177e4
LT		 4738}
4739
d45f60c6
WAA		 4740static int nfs4_write_done_cb(struct rpc_task *task,
4741 struct nfs_pgio_header *hdr)
1da177e4 4742{
d45f60c6 4743 struct inode *inode = hdr->inode;
8478eaa1 4744
d45f60c6 4745 trace_nfs4_write(hdr, task->tk_status);
9c27869d
TM		 4746 if (task->tk_status < 0) {
4747 struct nfs4_exception exception = {
4748 .inode = hdr->inode,
4749 .state = hdr->args.context->state,
4750 .stateid = &hdr->args.stateid,
4751 };
4752 task->tk_status = nfs4_async_handle_exception(task,
4753 NFS_SERVER(inode), task->tk_status,
4754 &exception);
4755 if (exception.retry) {
4756 rpc_restart_call_prepare(task);
4757 return -EAGAIN;
4758 }
1da177e4 4759 }
4f9838c7 4760 if (task->tk_status >= 0) {
d45f60c6 4761 renew_lease(NFS_SERVER(inode), hdr->timestamp);
a08a8cd3 4762 nfs_writeback_update_inode(hdr);
4f9838c7 4763 }
788e7a89 4764 return 0;
1da177e4
LT		 4765}
4766
5521abfd 4767static bool nfs4_write_stateid_changed(struct rpc_task *task,
3c6b899c 4768 struct nfs_pgio_args *args)
5521abfd
TM		 4769{
4770
4771 if (!nfs4_error_stateid_expired(task->tk_status) ||
4772 nfs4_stateid_is_current(&args->stateid,
4773 args->context,
4774 args->lock_context,
4775 FMODE_WRITE))
4776 return false;
4777 rpc_restart_call_prepare(task);
4778 return true;
4779}
4780
d45f60c6 4781static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
b029bc9b 4782{
d45f60c6 4783 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
b029bc9b 4784 return -EAGAIN;
d45f60c6 4785 if (nfs4_write_stateid_changed(task, &hdr->args))
5521abfd 4786 return -EAGAIN;
d45f60c6
WAA		 4787 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4788 nfs4_write_done_cb(task, hdr);
b029bc9b
FI		 4789}
4790
5a37f851 4791static
d45f60c6 4792bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
a69aef14 4793{
5a37f851 4794 /* Don't request attributes for pNFS or O_DIRECT writes */
d45f60c6 4795 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
5a37f851
TM		 4796 return false;
4797 /* Otherwise, request attributes if and only if we don't hold
4798 * a delegation
4799 */
011e2a7f 4800 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 4801}
a69aef14 4802
d45f60c6
WAA		 4803static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
4804 struct rpc_message *msg)
1da177e4 4805{
d45f60c6 4806 struct nfs_server *server = NFS_SERVER(hdr->inode);
bdc7f021 4807
d45f60c6
WAA		 4808 if (!nfs4_write_need_cache_consistency_data(hdr)) {
4809 hdr->args.bitmask = NULL;
4810 hdr->res.fattr = NULL;
7ffd1064 4811 } else
d45f60c6 4812 hdr->args.bitmask = server->cache_consistency_bitmask;
5a37f851 4813
d45f60c6
WAA		 4814 if (!hdr->pgio_done_cb)
4815 hdr->pgio_done_cb = nfs4_write_done_cb;
4816 hdr->res.server = server;
4817 hdr->timestamp = jiffies;
1da177e4 4818
bdc7f021 4819 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
d45f60c6 4820 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
1da177e4
LT		 4821}
4822
0b7c0153 4823static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 4824{
d9afbd1b
TM		 4825 nfs4_setup_sequence(NFS_SERVER(data->inode),
4826 &data->args.seq_args,
4827 &data->res.seq_res,
4828 task);
1da177e4
LT		 4829}
4830
0b7c0153 4831static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 4832{
1da177e4 4833 struct inode *inode = data->inode;
14516c3a 4834
cc668ab3 4835 trace_nfs4_commit(data, task->tk_status);
8478eaa1
N		 4836 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4837 NULL, NULL) == -EAGAIN) {
d00c5d43 4838 rpc_restart_call_prepare(task);
788e7a89 4839 return -EAGAIN;
1da177e4 4840 }
788e7a89 4841 return 0;
1da177e4
LT		 4842}
4843
0b7c0153 4844static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 4845{
4846 if (!nfs4_sequence_done(task, &data->res.seq_res))
4847 return -EAGAIN;
0b7c0153 4848 return data->commit_done_cb(task, data);
5f452431
FI		 4849}
4850
0b7c0153 4851static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 4852{
788e7a89 4853 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 4854
0b7c0153
FI		 4855 if (data->commit_done_cb == NULL)
4856 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 4857 data->res.server = server;
bdc7f021 4858 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
a9c92d6b 4859 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4860}
4861
9bc4e3ca
CL		 4862struct nfs4_renewdata {
4863 struct nfs_client *client;
4864 unsigned long timestamp;
4865};
4866
1da177e4
LT		 4867/*
4868 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4869 * standalone procedure for queueing an asynchronous RENEW.
4870 */
9bc4e3ca 4871static void nfs4_renew_release(void *calldata)
dc96aef9 4872{
9bc4e3ca
CL		 4873 struct nfs4_renewdata *data = calldata;
4874 struct nfs_client *clp = data->client;
dc96aef9 4875
0851de06
AB		 4876 if (atomic_read(&clp->cl_count) > 1)
4877 nfs4_schedule_state_renewal(clp);
4878 nfs_put_client(clp);
9bc4e3ca 4879 kfree(data);
dc96aef9
AB		 4880}
4881
9bc4e3ca 4882static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 4883{
9bc4e3ca
CL		 4884 struct nfs4_renewdata *data = calldata;
4885 struct nfs_client *clp = data->client;
4886 unsigned long timestamp = data->timestamp;
1da177e4 4887
c6d01c6f 4888 trace_nfs4_renew_async(clp, task->tk_status);
f8aba1e8
CL		 4889 switch (task->tk_status) {
4890 case 0:
4891 break;
4892 case -NFS4ERR_LEASE_MOVED:
4893 nfs4_schedule_lease_moved_recovery(clp);
4894 break;
4895 default:
95baa25c 4896 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 4897 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4898 return;
4899 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 4900 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 4901 return;
4902 }
4903 nfs4_schedule_path_down_recovery(clp);
1da177e4 4904 }
452e9352 4905 do_renew_lease(clp, timestamp);
1da177e4
LT		 4906}
4907
963d8fe5
TM		 4908static const struct rpc_call_ops nfs4_renew_ops = {
4909 .rpc_call_done = nfs4_renew_done,
dc96aef9 4910 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 4911};
4912
2f60ea6b 4913static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 4914{
4915 struct rpc_message msg = {
4916 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4917 .rpc_argp = clp,
b4454fe1 4918 .rpc_cred = cred,
1da177e4 4919 };
9bc4e3ca 4920 struct nfs4_renewdata *data;
1da177e4 4921
2f60ea6b
TM		 4922 if (renew_flags == 0)
4923 return 0;
0851de06
AB		 4924 if (!atomic_inc_not_zero(&clp->cl_count))
4925 return -EIO;
b569ad34 4926 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 4927 if (data == NULL)
4928 return -ENOMEM;
4929 data->client = clp;
4930 data->timestamp = jiffies;
bc7a05ca 4931 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 4932 &nfs4_renew_ops, data);
1da177e4
LT		 4933}
4934
8534d4ec 4935static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 4936{
4937 struct rpc_message msg = {
4938 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4939 .rpc_argp = clp,
b4454fe1 4940 .rpc_cred = cred,
1da177e4
LT		 4941 };
4942 unsigned long now = jiffies;
4943 int status;
4944
bc7a05ca 4945 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4946 if (status < 0)
4947 return status;
452e9352 4948 do_renew_lease(clp, now);
1da177e4
LT		 4949 return 0;
4950}
4951
aa1870af
BF		 4952static inline int nfs4_server_supports_acls(struct nfs_server *server)
4953{
7dd7d959 4954 return server->caps & NFS_CAP_ACLS;
aa1870af
BF		 4955}
4956
21f498c2
TM		 4957/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4958 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 4959 * the stack.
4960 */
21f498c2 4961#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 4962
e9e3d724 4963static int buf_to_pages_noslab(const void *buf, size_t buflen,
8fbcf237 4964 struct page **pages)
e9e3d724
NH		 4965{
4966 struct page *newpage, **spages;
4967 int rc = 0;
4968 size_t len;
4969 spages = pages;
4970
4971 do {
21f498c2 4972 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 4973 newpage = alloc_page(GFP_KERNEL);
4974
4975 if (newpage == NULL)
4976 goto unwind;
4977 memcpy(page_address(newpage), buf, len);
4978 buf += len;
4979 buflen -= len;
4980 *pages++ = newpage;
4981 rc++;
4982 } while (buflen != 0);
4983
4984 return rc;
4985
4986unwind:
4987 for(; rc > 0; rc--)
4988 __free_page(spages[rc-1]);
4989 return -ENOMEM;
4990}
4991
e50a1c2e
BF		 4992struct nfs4_cached_acl {
4993 int cached;
4994 size_t len;
3e9d4154 4995 char data[0];
e50a1c2e
BF		 4996};
4997
4998static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4999{
5000 struct nfs_inode *nfsi = NFS_I(inode);
5001
5002 spin_lock(&inode->i_lock);
5003 kfree(nfsi->nfs4_acl);
5004 nfsi->nfs4_acl = acl;
5005 spin_unlock(&inode->i_lock);
5006}
5007
5008static void nfs4_zap_acl_attr(struct inode *inode)
5009{
5010 nfs4_set_cached_acl(inode, NULL);
5011}
5012
5013static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
5014{
5015 struct nfs_inode *nfsi = NFS_I(inode);
5016 struct nfs4_cached_acl *acl;
5017 int ret = -ENOENT;
5018
5019 spin_lock(&inode->i_lock);
5020 acl = nfsi->nfs4_acl;
5021 if (acl == NULL)
5022 goto out;
5023 if (buf == NULL) /* user is just asking for length */
5024 goto out_len;
5025 if (acl->cached == 0)
5026 goto out;
5027 ret = -ERANGE; /* see getxattr(2) man page */
5028 if (acl->len > buflen)
5029 goto out;
5030 memcpy(buf, acl->data, acl->len);
5031out_len:
5032 ret = acl->len;
5033out:
5034 spin_unlock(&inode->i_lock);
5035 return ret;
5036}
5037
5794d21e 5038static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 5039{
5040 struct nfs4_cached_acl *acl;
b291f1b1 5041 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 5042
1f1ea6c2 5043 if (buflen <= PAGE_SIZE) {
b291f1b1 5044 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 5045 if (acl == NULL)
5046 goto out;
5047 acl->cached = 1;
5794d21e 5048 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 5049 } else {
5050 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
5051 if (acl == NULL)
5052 goto out;
5053 acl->cached = 0;
5054 }
5055 acl->len = acl_len;
5056out:
5057 nfs4_set_cached_acl(inode, acl);
5058}
5059
bf118a34
AA		 5060/*
5061 * The getxattr API returns the required buffer length when called with a
5062 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
5063 * the required buf. On a NULL buf, we send a page of data to the server
5064 * guessing that the ACL request can be serviced by a page. If so, we cache
5065 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
5066 * the cache. If not so, we throw away the page, and cache the required
5067 * length. The next getxattr call will then produce another round trip to
5068 * the server, this time with the input buf of the required size.
5069 */
16b4289c 5070static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 5071{
bf118a34 5072 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 5073 struct nfs_getaclargs args = {
5074 .fh = NFS_FH(inode),
5075 .acl_pages = pages,
5076 .acl_len = buflen,
5077 };
663c79b3
BH		 5078 struct nfs_getaclres res = {
5079 .acl_len = buflen,
5080 };
aa1870af
BF		 5081 struct rpc_message msg = {
5082 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
5083 .rpc_argp = &args,
663c79b3 5084 .rpc_resp = &res,
aa1870af 5085 };
21f498c2
TM		 5086 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
5087 int ret = -ENOMEM, i;
aa1870af 5088
bf118a34
AA		 5089 /* As long as we're doing a round trip to the server anyway,
5090 * let's be prepared for a page of acl data. */
5091 if (npages == 0)
5092 npages = 1;
21f498c2
TM		 5093 if (npages > ARRAY_SIZE(pages))
5094 return -ERANGE;
5a006899 5095
bf118a34
AA		 5096 for (i = 0; i < npages; i++) {
5097 pages[i] = alloc_page(GFP_KERNEL);
5098 if (!pages[i])
5099 goto out_free;
e50a1c2e 5100 }
5a006899
SP		 5101
5102 /* for decoding across pages */
5103 res.acl_scratch = alloc_page(GFP_KERNEL);
5104 if (!res.acl_scratch)
5105 goto out_free;
5106
bf118a34 5107 args.acl_len = npages * PAGE_SIZE;
5a006899 5108
de040bec 5109 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 5110 __func__, buf, buflen, npages, args.acl_len);
5111 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
5112 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 5113 if (ret)
5114 goto out_free;
bf118a34 5115
1f1ea6c2
TM		 5116 /* Handle the case where the passed-in buffer is too short */
5117 if (res.acl_flags & NFS4_ACL_TRUNC) {
5118 /* Did the user only issue a request for the acl length? */
5119 if (buf == NULL)
5120 goto out_ok;
e50a1c2e 5121 ret = -ERANGE;
1f1ea6c2 5122 goto out_free;
e50a1c2e 5123 }
1f1ea6c2 5124 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 5125 if (buf) {
5126 if (res.acl_len > buflen) {
5127 ret = -ERANGE;
5128 goto out_free;
5129 }
1f1ea6c2 5130 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 5131 }
1f1ea6c2
TM		 5132out_ok:
5133 ret = res.acl_len;
e50a1c2e 5134out_free:
bf118a34
AA		 5135 for (i = 0; i < npages; i++)
5136 if (pages[i])
5137 __free_page(pages[i]);
331818f1
TM		 5138 if (res.acl_scratch)
5139 __free_page(res.acl_scratch);
aa1870af
BF		 5140 return ret;
5141}
5142
16b4289c
TM		 5143static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
5144{
5145 struct nfs4_exception exception = { };
5146 ssize_t ret;
5147 do {
5148 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
c1578b76 5149 trace_nfs4_get_acl(inode, ret);
16b4289c
TM		 5150 if (ret >= 0)
5151 break;
5152 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
5153 } while (exception.retry);
5154 return ret;
5155}
5156
e50a1c2e
BF		 5157static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
5158{
5159 struct nfs_server *server = NFS_SERVER(inode);
5160 int ret;
5161
5162 if (!nfs4_server_supports_acls(server))
5163 return -EOPNOTSUPP;
5164 ret = nfs_revalidate_inode(server, inode);
5165 if (ret < 0)
5166 return ret;
08a22b39
AK		 5167 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
5168 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 5169 ret = nfs4_read_cached_acl(inode, buf, buflen);
5170 if (ret != -ENOENT)
bf118a34
AA		 5171 /* -ENOENT is returned if there is no ACL or if there is an ACL
5172 * but no cached acl data, just the acl length */
e50a1c2e
BF		 5173 return ret;
5174 return nfs4_get_acl_uncached(inode, buf, buflen);
5175}
5176
16b4289c 5177static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 5178{
5179 struct nfs_server *server = NFS_SERVER(inode);
5180 struct page *pages[NFS4ACL_MAXPAGES];
5181 struct nfs_setaclargs arg = {
5182 .fh = NFS_FH(inode),
5183 .acl_pages = pages,
5184 .acl_len = buflen,
5185 };
73c403a9 5186 struct nfs_setaclres res;
4b580ee3
BF		 5187 struct rpc_message msg = {
5188 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
5189 .rpc_argp = &arg,
73c403a9 5190 .rpc_resp = &res,
4b580ee3 5191 };
21f498c2 5192 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 5193 int ret, i;
4b580ee3
BF		 5194
5195 if (!nfs4_server_supports_acls(server))
5196 return -EOPNOTSUPP;
21f498c2
TM		 5197 if (npages > ARRAY_SIZE(pages))
5198 return -ERANGE;
8fbcf237 5199 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages);
e9e3d724
NH		 5200 if (i < 0)
5201 return i;
57ec14c5 5202 nfs4_inode_return_delegation(inode);
7c513058 5203 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 5204
5205 /*
5206 * Free each page after tx, so the only ref left is
5207 * held by the network stack
5208 */
5209 for (; i > 0; i--)
5210 put_page(pages[i-1]);
5211
08a22b39
AK		 5212 /*
5213 * Acl update can result in inode attribute update.
5214 * so mark the attribute cache invalid.
5215 */
5216 spin_lock(&inode->i_lock);
5217 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
5218 spin_unlock(&inode->i_lock);
f41f7418
TM		 5219 nfs_access_zap_cache(inode);
5220 nfs_zap_acl_cache(inode);
4b580ee3
BF		 5221 return ret;
5222}
5223
16b4289c
TM		 5224static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
5225{
5226 struct nfs4_exception exception = { };
5227 int err;
5228 do {
c1578b76
TM		 5229 err = __nfs4_proc_set_acl(inode, buf, buflen);
5230 trace_nfs4_set_acl(inode, err);
5231 err = nfs4_handle_exception(NFS_SERVER(inode), err,
16b4289c
TM		 5232 &exception);
5233 } while (exception.retry);
5234 return err;
5235}
5236
aa9c2669
DQ		 5237#ifdef CONFIG_NFS_V4_SECURITY_LABEL
5238static int _nfs4_get_security_label(struct inode *inode, void *buf,
5239 size_t buflen)
5240{
5241 struct nfs_server *server = NFS_SERVER(inode);
5242 struct nfs_fattr fattr;
5243 struct nfs4_label label = {0, 0, buflen, buf};
5244
5245 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
fcb63a9b 5246 struct nfs4_getattr_arg arg = {
aa9c2669
DQ		 5247 .fh = NFS_FH(inode),
5248 .bitmask = bitmask,
5249 };
5250 struct nfs4_getattr_res res = {
5251 .fattr = &fattr,
5252 .label = &label,
5253 .server = server,
5254 };
5255 struct rpc_message msg = {
5256 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
fcb63a9b 5257 .rpc_argp = &arg,
aa9c2669
DQ		 5258 .rpc_resp = &res,
5259 };
5260 int ret;
5261
5262 nfs_fattr_init(&fattr);
5263
fcb63a9b 5264 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
aa9c2669
DQ		 5265 if (ret)
5266 return ret;
5267 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
5268 return -ENOENT;
5269 if (buflen < label.len)
5270 return -ERANGE;
5271 return 0;
5272}
5273
5274static int nfs4_get_security_label(struct inode *inode, void *buf,
5275 size_t buflen)
5276{
5277 struct nfs4_exception exception = { };
5278 int err;
5279
5280 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
5281 return -EOPNOTSUPP;
5282
5283 do {
c1578b76
TM		 5284 err = _nfs4_get_security_label(inode, buf, buflen);
5285 trace_nfs4_get_security_label(inode, err);
5286 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 5287 &exception);
5288 } while (exception.retry);
5289 return err;
5290}
5291
5292static int _nfs4_do_set_security_label(struct inode *inode,
5293 struct nfs4_label *ilabel,
5294 struct nfs_fattr *fattr,
5295 struct nfs4_label *olabel)
5296{
5297
5298 struct iattr sattr = {0};
5299 struct nfs_server *server = NFS_SERVER(inode);
5300 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
12207f69 5301 struct nfs_setattrargs arg = {
aa9c2669
DQ		 5302 .fh = NFS_FH(inode),
5303 .iap = &sattr,
5304 .server = server,
5305 .bitmask = bitmask,
5306 .label = ilabel,
5307 };
5308 struct nfs_setattrres res = {
5309 .fattr = fattr,
5310 .label = olabel,
5311 .server = server,
5312 };
5313 struct rpc_message msg = {
5314 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
12207f69 5315 .rpc_argp = &arg,
aa9c2669
DQ		 5316 .rpc_resp = &res,
5317 };
5318 int status;
5319
12207f69 5320 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
aa9c2669 5321
12207f69 5322 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
aa9c2669
DQ		 5323 if (status)
5324 dprintk("%s failed: %d\n", __func__, status);
5325
5326 return status;
5327}
5328
5329static int nfs4_do_set_security_label(struct inode *inode,
5330 struct nfs4_label *ilabel,
5331 struct nfs_fattr *fattr,
5332 struct nfs4_label *olabel)
5333{
5334 struct nfs4_exception exception = { };
5335 int err;
5336
5337 do {
c1578b76
TM		 5338 err = _nfs4_do_set_security_label(inode, ilabel,
5339 fattr, olabel);
5340 trace_nfs4_set_security_label(inode, err);
5341 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 5342 &exception);
5343 } while (exception.retry);
5344 return err;
5345}
5346
5347static int
59301226 5348nfs4_set_security_label(struct inode *inode, const void *buf, size_t buflen)
aa9c2669
DQ		 5349{
5350 struct nfs4_label ilabel, *olabel = NULL;
5351 struct nfs_fattr fattr;
5352 struct rpc_cred *cred;
aa9c2669
DQ		 5353 int status;
5354
5355 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
5356 return -EOPNOTSUPP;
5357
5358 nfs_fattr_init(&fattr);
5359
5360 ilabel.pi = 0;
5361 ilabel.lfs = 0;
5362 ilabel.label = (char *)buf;
5363 ilabel.len = buflen;
5364
5365 cred = rpc_lookup_cred();
5366 if (IS_ERR(cred))
5367 return PTR_ERR(cred);
5368
5369 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
5370 if (IS_ERR(olabel)) {
5371 status = -PTR_ERR(olabel);
5372 goto out;
5373 }
5374
5375 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
5376 if (status == 0)
5377 nfs_setsecurity(inode, &fattr, olabel);
5378
5379 nfs4_label_free(olabel);
5380out:
5381 put_rpccred(cred);
5382 return status;
5383}
5384#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
5385
5386
f092075d
CL		 5387static void nfs4_init_boot_verifier(const struct nfs_client *clp,
5388 nfs4_verifier *bootverf)
cd93710e
CL		 5389{
5390 __be32 verf[2];
5391
2c820d9a
CL		 5392 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
5393 /* An impossible timestamp guarantees this value
5394 * will never match a generated boot time. */
2f86e091
DD		 5395 verf[0] = cpu_to_be32(U32_MAX);
5396 verf[1] = cpu_to_be32(U32_MAX);
2c820d9a 5397 } else {
f092075d 5398 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
2f86e091
DD		 5399 u64 ns = ktime_to_ns(nn->boot_time);
5400
5401 verf[0] = cpu_to_be32(ns >> 32);
5402 verf[1] = cpu_to_be32(ns);
2c820d9a 5403 }
cd93710e
CL		 5404 memcpy(bootverf->data, verf, sizeof(bootverf->data));
5405}
5406
a3192688
JL		 5407static int
5408nfs4_init_nonuniform_client_string(struct nfs_client *clp)
e984a55a 5409{
a3192688
JL		 5410 size_t len;
5411 char *str;
e984a55a 5412
ceb3a16c 5413 if (clp->cl_owner_id != NULL)
a3192688 5414 return 0;
4a3e5779 5415
a3192688 5416 rcu_read_lock();
4a70316c 5417 len = 14 + strlen(clp->cl_ipaddr) + 1 +
a3192688
JL		 5418 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) +
5419 1 +
5420 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO)) +
5421 1;
5422 rcu_read_unlock();
5423
5424 if (len > NFS4_OPAQUE_LIMIT + 1)
5425 return -EINVAL;
5426
5427 /*
5428 * Since this string is allocated at mount time, and held until the
5429 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5430 * about a memory-reclaim deadlock.
5431 */
5432 str = kmalloc(len, GFP_KERNEL);
5433 if (!str)
5434 return -ENOMEM;
ceb3a16c 5435
e984a55a 5436 rcu_read_lock();
f2dd436e 5437 scnprintf(str, len, "Linux NFSv4.0 %s/%s %s",
a3192688
JL		 5438 clp->cl_ipaddr,
5439 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR),
5440 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO));
e984a55a 5441 rcu_read_unlock();
a3192688 5442
a3192688
JL		 5443 clp->cl_owner_id = str;
5444 return 0;
e984a55a
CL		 5445}
5446
873e3851
JL		 5447static int
5448nfs4_init_uniquifier_client_string(struct nfs_client *clp)
5449{
873e3851
JL		 5450 size_t len;
5451 char *str;
5452
5453 len = 10 + 10 + 1 + 10 + 1 +
5454 strlen(nfs4_client_id_uniquifier) + 1 +
5455 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5456
5457 if (len > NFS4_OPAQUE_LIMIT + 1)
5458 return -EINVAL;
5459
5460 /*
5461 * Since this string is allocated at mount time, and held until the
5462 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5463 * about a memory-reclaim deadlock.
5464 */
5465 str = kmalloc(len, GFP_KERNEL);
5466 if (!str)
5467 return -ENOMEM;
5468
f2dd436e 5469 scnprintf(str, len, "Linux NFSv%u.%u %s/%s",
873e3851
JL		 5470 clp->rpc_ops->version, clp->cl_minorversion,
5471 nfs4_client_id_uniquifier,
5472 clp->cl_rpcclient->cl_nodename);
873e3851
JL		 5473 clp->cl_owner_id = str;
5474 return 0;
5475}
5476
5477static int
5478nfs4_init_uniform_client_string(struct nfs_client *clp)
e984a55a 5479{
873e3851
JL		 5480 size_t len;
5481 char *str;
ceb3a16c
TM		 5482
5483 if (clp->cl_owner_id != NULL)
873e3851 5484 return 0;
6f2ea7f2
CL		 5485
5486 if (nfs4_client_id_uniquifier[0] != '\0')
873e3851
JL		 5487 return nfs4_init_uniquifier_client_string(clp);
5488
5489 len = 10 + 10 + 1 + 10 + 1 +
5490 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5491
5492 if (len > NFS4_OPAQUE_LIMIT + 1)
5493 return -EINVAL;
5494
5495 /*
5496 * Since this string is allocated at mount time, and held until the
5497 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5498 * about a memory-reclaim deadlock.
5499 */
5500 str = kmalloc(len, GFP_KERNEL);
5501 if (!str)
5502 return -ENOMEM;
5503
f2dd436e 5504 scnprintf(str, len, "Linux NFSv%u.%u %s",
873e3851
JL		 5505 clp->rpc_ops->version, clp->cl_minorversion,
5506 clp->cl_rpcclient->cl_nodename);
873e3851
JL		 5507 clp->cl_owner_id = str;
5508 return 0;
e984a55a
CL		 5509}
5510
706cb8db
CL		 5511/*
5512 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
5513 * services. Advertise one based on the address family of the
5514 * clientaddr.
5515 */
5516static unsigned int
5517nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
5518{
5519 if (strchr(clp->cl_ipaddr, ':') != NULL)
5520 return scnprintf(buf, len, "tcp6");
5521 else
5522 return scnprintf(buf, len, "tcp");
5523}
5524
f11b2a1c
JL		 5525static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
5526{
5527 struct nfs4_setclientid *sc = calldata;
5528
5529 if (task->tk_status == 0)
5530 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
5531}
5532
5533static const struct rpc_call_ops nfs4_setclientid_ops = {
5534 .rpc_call_done = nfs4_setclientid_done,
5535};
5536
6bbb4ae8
CL		 5537/**
5538 * nfs4_proc_setclientid - Negotiate client ID
5539 * @clp: state data structure
5540 * @program: RPC program for NFSv4 callback service
5541 * @port: IP port number for NFS4 callback service
5542 * @cred: RPC credential to use for this call
5543 * @res: where to place the result
5544 *
5545 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5546 */
bb8b27e5
TM		 5547int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
5548 unsigned short port, struct rpc_cred *cred,
5549 struct nfs4_setclientid_res *res)
1da177e4
LT		 5550{
5551 nfs4_verifier sc_verifier;
5552 struct nfs4_setclientid setclientid = {
5553 .sc_verifier = &sc_verifier,
5554 .sc_prog = program,
3a6bb738 5555 .sc_clnt = clp,
1da177e4
LT		 5556 };
5557 struct rpc_message msg = {
5558 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
5559 .rpc_argp = &setclientid,
bb8b27e5 5560 .rpc_resp = res,
286d7d6a 5561 .rpc_cred = cred,
1da177e4 5562 };
f11b2a1c
JL		 5563 struct rpc_task *task;
5564 struct rpc_task_setup task_setup_data = {
5565 .rpc_client = clp->cl_rpcclient,
5566 .rpc_message = &msg,
5567 .callback_ops = &nfs4_setclientid_ops,
5568 .callback_data = &setclientid,
5569 .flags = RPC_TASK_TIMEOUT,
5570 };
6bbb4ae8 5571 int status;
1da177e4 5572
de734831 5573 /* nfs_client_id4 */
f092075d 5574 nfs4_init_boot_verifier(clp, &sc_verifier);
873e3851
JL		 5575
5576 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
5577 status = nfs4_init_uniform_client_string(clp);
5578 else
a3192688 5579 status = nfs4_init_nonuniform_client_string(clp);
873e3851
JL		 5580
5581 if (status)
5582 goto out;
3a6bb738 5583
de734831 5584 /* cb_client4 */
706cb8db
CL		 5585 setclientid.sc_netid_len =
5586 nfs4_init_callback_netid(clp,
5587 setclientid.sc_netid,
5588 sizeof(setclientid.sc_netid));
de734831 5589 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 5590 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 5591 clp->cl_ipaddr, port >> 8, port & 255);
5592
3a6bb738 5593 dprintk("NFS call setclientid auth=%s, '%s'\n",
6bbb4ae8 5594 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3a6bb738 5595 clp->cl_owner_id);
f11b2a1c
JL		 5596 task = rpc_run_task(&task_setup_data);
5597 if (IS_ERR(task)) {
5598 status = PTR_ERR(task);
5599 goto out;
5600 }
5601 status = task->tk_status;
5602 if (setclientid.sc_cred) {
5603 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
5604 put_rpccred(setclientid.sc_cred);
5605 }
5606 rpc_put_task(task);
5607out:
c6d01c6f 5608 trace_nfs4_setclientid(clp, status);
6bbb4ae8
CL		 5609 dprintk("NFS reply setclientid: %d\n", status);
5610 return status;
1da177e4
LT		 5611}
5612
6bbb4ae8
CL		 5613/**
5614 * nfs4_proc_setclientid_confirm - Confirm client ID
5615 * @clp: state data structure
5616 * @res: result of a previous SETCLIENTID
5617 * @cred: RPC credential to use for this call
5618 *
5619 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5620 */
fd954ae1 5621int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 5622 struct nfs4_setclientid_res *arg,
5623 struct rpc_cred *cred)
1da177e4 5624{
1da177e4
LT		 5625 struct rpc_message msg = {
5626 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 5627 .rpc_argp = arg,
286d7d6a 5628 .rpc_cred = cred,
1da177e4 5629 };
1da177e4
LT		 5630 int status;
5631
6bbb4ae8
CL		 5632 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
5633 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5634 clp->cl_clientid);
1bd714f2 5635 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 5636 trace_nfs4_setclientid_confirm(clp, status);
6bbb4ae8 5637 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 5638 return status;
5639}
5640
fe650407
TM		 5641struct nfs4_delegreturndata {
5642 struct nfs4_delegreturnargs args;
fa178f29 5643 struct nfs4_delegreturnres res;
fe650407
TM		 5644 struct nfs_fh fh;
5645 nfs4_stateid stateid;
26e976a8 5646 unsigned long timestamp;
586f1c39
TM		 5647 struct {
5648 struct nfs4_layoutreturn_args arg;
5649 struct nfs4_layoutreturn_res res;
4d796d75 5650 struct nfs4_xdr_opaque_data ld_private;
586f1c39
TM		 5651 u32 roc_barrier;
5652 bool roc;
5653 } lr;
fa178f29 5654 struct nfs_fattr fattr;
fe650407 5655 int rpc_status;
039b756a 5656 struct inode *inode;
fe650407
TM		 5657};
5658
fe650407
TM		 5659static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
5660{
5661 struct nfs4_delegreturndata *data = calldata;
938e1010 5662
14516c3a
TM		 5663 if (!nfs4_sequence_done(task, &data->res.seq_res))
5664 return;
938e1010 5665
ca8acf8d 5666 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
586f1c39
TM		 5667
5668 /* Handle Layoutreturn errors */
5669 if (data->args.lr_args && task->tk_status != 0) {
5670 switch(data->res.lr_ret) {
5671 default:
5672 data->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
5673 break;
5674 case 0:
5675 data->args.lr_args = NULL;
5676 data->res.lr_res = NULL;
5677 break;
5678 case -NFS4ERR_ADMIN_REVOKED:
5679 case -NFS4ERR_DELEG_REVOKED:
5680 case -NFS4ERR_EXPIRED:
5681 case -NFS4ERR_BAD_STATEID:
5682 case -NFS4ERR_OLD_STATEID:
5683 case -NFS4ERR_UNKNOWN_LAYOUTTYPE:
5684 case -NFS4ERR_WRONG_CRED:
5685 data->args.lr_args = NULL;
5686 data->res.lr_res = NULL;
5687 data->res.lr_ret = 0;
5688 rpc_restart_call_prepare(task);
5689 return;
5690 }
5691 }
5692
79708861 5693 switch (task->tk_status) {
79708861 5694 case 0:
fa178f29 5695 renew_lease(data->res.server, data->timestamp);
23ea44c2 5696 break;
c97cf606
TM		 5697 case -NFS4ERR_ADMIN_REVOKED:
5698 case -NFS4ERR_DELEG_REVOKED:
26d36301
TM		 5699 case -NFS4ERR_EXPIRED:
5700 nfs4_free_revoked_stateid(data->res.server,
5701 data->args.stateid,
5702 task->tk_msg.rpc_cred);
c97cf606
TM		 5703 case -NFS4ERR_BAD_STATEID:
5704 case -NFS4ERR_OLD_STATEID:
5705 case -NFS4ERR_STALE_STATEID:
c97cf606
TM		 5706 task->tk_status = 0;
5707 break;
8ac2b422
TM		 5708 case -NFS4ERR_ACCESS:
5709 if (data->args.bitmask) {
5710 data->args.bitmask = NULL;
5711 data->res.fattr = NULL;
5712 task->tk_status = 0;
5713 rpc_restart_call_prepare(task);
5714 return;
5715 }
79708861 5716 default:
8478eaa1
N		 5717 if (nfs4_async_handle_error(task, data->res.server,
5718 NULL, NULL) == -EAGAIN) {
d00c5d43 5719 rpc_restart_call_prepare(task);
79708861
RL		 5720 return;
5721 }
5722 }
5723 data->rpc_status = task->tk_status;
fe650407
TM		 5724}
5725
5726static void nfs4_delegreturn_release(void *calldata)
5727{
039b756a 5728 struct nfs4_delegreturndata *data = calldata;
ea7c38fe 5729 struct inode *inode = data->inode;
039b756a 5730
ea7c38fe 5731 if (inode) {
586f1c39 5732 if (data->lr.roc)
1c5bd76d
TM		 5733 pnfs_roc_release(&data->lr.arg, &data->lr.res,
5734 data->res.lr_ret);
0bc2c9b4 5735 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
ea7c38fe
TM		 5736 nfs_iput_and_deactive(inode);
5737 }
fe650407
TM		 5738 kfree(calldata);
5739}
5740
938e1010
AA		 5741static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5742{
5743 struct nfs4_delegreturndata *d_data;
5744
5745 d_data = (struct nfs4_delegreturndata *)data;
5746
1c5bd76d 5747 if (!d_data->lr.roc && nfs4_wait_on_layoutreturn(d_data->inode, task))
500d701f
PT		 5748 return;
5749
d9afbd1b
TM		 5750 nfs4_setup_sequence(d_data->res.server,
5751 &d_data->args.seq_args,
5752 &d_data->res.seq_res,
5753 task);
938e1010 5754}
938e1010 5755
c8d149f3 5756static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010 5757 .rpc_call_prepare = nfs4_delegreturn_prepare,
fe650407
TM		 5758 .rpc_call_done = nfs4_delegreturn_done,
5759 .rpc_release = nfs4_delegreturn_release,
5760};
5761
e6f81075 5762static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 5763{
5764 struct nfs4_delegreturndata *data;
fa178f29 5765 struct nfs_server *server = NFS_SERVER(inode);
fe650407 5766 struct rpc_task *task;
5138fde0
TM		 5767 struct rpc_message msg = {
5768 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5769 .rpc_cred = cred,
5770 };
c970aa85
TM		 5771 struct rpc_task_setup task_setup_data = {
5772 .rpc_client = server->client,
5138fde0 5773 .rpc_message = &msg,
c970aa85
TM		 5774 .callback_ops = &nfs4_delegreturn_ops,
5775 .flags = RPC_TASK_ASYNC,
5776 };
e6f81075 5777 int status = 0;
fe650407 5778
8535b2be 5779 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 5780 if (data == NULL)
5781 return -ENOMEM;
a9c92d6b 5782 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
99ade3c7
AE		 5783
5784 nfs4_state_protect(server->nfs_client,
5785 NFS_SP4_MACH_CRED_CLEANUP,
5786 &task_setup_data.rpc_client, &msg);
5787
fe650407
TM		 5788 data->args.fhandle = &data->fh;
5789 data->args.stateid = &data->stateid;
9e907fec 5790 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 5791 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 5792 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 5793 data->res.fattr = &data->fattr;
5794 data->res.server = server;
586f1c39 5795 data->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
4d796d75 5796 data->lr.arg.ld_private = &data->lr.ld_private;
5138fde0 5797 nfs_fattr_init(data->res.fattr);
26e976a8 5798 data->timestamp = jiffies;
fe650407 5799 data->rpc_status = 0;
53e6fc86 5800 data->lr.roc = pnfs_roc(inode, &data->lr.arg, &data->lr.res, cred);
ea7c38fe 5801 data->inode = nfs_igrab_and_active(inode);
1c5bd76d 5802 if (data->inode) {
1c5bd76d
TM		 5803 if (data->lr.roc) {
5804 data->args.lr_args = &data->lr.arg;
5805 data->res.lr_res = &data->lr.res;
5806 }
53e6fc86
TM		 5807 } else if (data->lr.roc) {
5808 pnfs_roc_release(&data->lr.arg, &data->lr.res, 0);
5809 data->lr.roc = false;
1c5bd76d 5810 }
fe650407 5811
c970aa85 5812 task_setup_data.callback_data = data;
1174dd1f
TM		 5813 msg.rpc_argp = &data->args;
5814 msg.rpc_resp = &data->res;
c970aa85 5815 task = rpc_run_task(&task_setup_data);
7a1218a2 5816 if (IS_ERR(task))
fe650407 5817 return PTR_ERR(task);
e6f81075
TM		 5818 if (!issync)
5819 goto out;
fe650407 5820 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 5821 if (status != 0)
5822 goto out;
5823 status = data->rpc_status;
e6f81075 5824out:
e6b3c4db 5825 rpc_put_task(task);
fe650407 5826 return status;
1da177e4
LT		 5827}
5828
e6f81075 5829int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 5830{
5831 struct nfs_server *server = NFS_SERVER(inode);
5832 struct nfs4_exception exception = { };
5833 int err;
5834 do {
e6f81075 5835 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
48c9579a 5836 trace_nfs4_delegreturn(inode, stateid, err);
1da177e4
LT		 5837 switch (err) {
5838 case -NFS4ERR_STALE_STATEID:
5839 case -NFS4ERR_EXPIRED:
1da177e4
LT		 5840 case 0:
5841 return 0;
5842 }
5843 err = nfs4_handle_exception(server, err, &exception);
5844 } while (exception.retry);
5845 return err;
5846}
5847
1da177e4
LT		 5848static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5849{
5850 struct inode *inode = state->inode;
5851 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 5852 struct nfs_client *clp = server->nfs_client;
911d1aaf 5853 struct nfs_lockt_args arg = {
1da177e4 5854 .fh = NFS_FH(inode),
911d1aaf 5855 .fl = request,
1da177e4 5856 };
911d1aaf
TM		 5857 struct nfs_lockt_res res = {
5858 .denied = request,
1da177e4
LT		 5859 };
5860 struct rpc_message msg = {
5861 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5862 .rpc_argp = &arg,
5863 .rpc_resp = &res,
5864 .rpc_cred = state->owner->so_cred,
5865 };
1da177e4
LT		 5866 struct nfs4_lock_state *lsp;
5867 int status;
5868
911d1aaf 5869 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 5870 status = nfs4_set_lock_state(state, request);
5871 if (status != 0)
5872 goto out;
5873 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 5874 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5875 arg.lock_owner.s_dev = server->s_dev;
7c513058 5876 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 5877 switch (status) {
5878 case 0:
5879 request->fl_type = F_UNLCK;
5880 break;
5881 case -NFS4ERR_DENIED:
5882 status = 0;
1da177e4 5883 }
70cc6487 5884 request->fl_ops->fl_release_private(request);
a6f951dd 5885 request->fl_ops = NULL;
8d0a8a9d 5886out:
1da177e4
LT		 5887 return status;
5888}
5889
5890static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5891{
5892 struct nfs4_exception exception = { };
5893 int err;
5894
5895 do {
d1b748a5
TM		 5896 err = _nfs4_proc_getlk(state, cmd, request);
5897 trace_nfs4_get_lock(request, state, cmd, err);
5898 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
1da177e4
LT		 5899 &exception);
5900 } while (exception.retry);
5901 return err;
5902}
5903
faf5f49c 5904struct nfs4_unlockdata {
911d1aaf
TM		 5905 struct nfs_locku_args arg;
5906 struct nfs_locku_res res;
faf5f49c
TM		 5907 struct nfs4_lock_state *lsp;
5908 struct nfs_open_context *ctx;
911d1aaf 5909 struct file_lock fl;
516285eb 5910 struct nfs_server *server;
26e976a8 5911 unsigned long timestamp;
faf5f49c
TM		 5912};
5913
911d1aaf
TM		 5914static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5915 struct nfs_open_context *ctx,
5916 struct nfs4_lock_state *lsp,
5917 struct nfs_seqid *seqid)
5918{
5919 struct nfs4_unlockdata *p;
5920 struct inode *inode = lsp->ls_state->inode;
5921
8535b2be 5922 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 5923 if (p == NULL)
5924 return NULL;
5925 p->arg.fh = NFS_FH(inode);
5926 p->arg.fl = &p->fl;
5927 p->arg.seqid = seqid;
c1d51931 5928 p->res.seqid = seqid;
911d1aaf
TM		 5929 p->lsp = lsp;
5930 atomic_inc(&lsp->ls_count);
5931 /* Ensure we don't close file until we're done freeing locks! */
5932 p->ctx = get_nfs_open_context(ctx);
5933 memcpy(&p->fl, fl, sizeof(p->fl));
5934 p->server = NFS_SERVER(inode);
5935 return p;
5936}
5937
06f814a3 5938static void nfs4_locku_release_calldata(void *data)
faf5f49c 5939{
963d8fe5 5940 struct nfs4_unlockdata *calldata = data;
911d1aaf 5941 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 5942 nfs4_put_lock_state(calldata->lsp);
5943 put_nfs_open_context(calldata->ctx);
5944 kfree(calldata);
faf5f49c
TM		 5945}
5946
963d8fe5 5947static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 5948{
963d8fe5 5949 struct nfs4_unlockdata *calldata = data;
faf5f49c 5950
14516c3a
TM		 5951 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5952 return;
faf5f49c
TM		 5953 switch (task->tk_status) {
5954 case 0:
26e976a8 5955 renew_lease(calldata->server, calldata->timestamp);
75575ddf 5956 locks_lock_inode_wait(calldata->lsp->ls_state->inode, &calldata->fl);
c69899a1
TM		 5957 if (nfs4_update_lock_stateid(calldata->lsp,
5958 &calldata->res.stateid))
5959 break;
26d36301
TM		 5960 case -NFS4ERR_ADMIN_REVOKED:
5961 case -NFS4ERR_EXPIRED:
5962 nfs4_free_revoked_stateid(calldata->server,
5963 &calldata->arg.stateid,
5964 task->tk_msg.rpc_cred);
9e33bed5
TM		 5965 case -NFS4ERR_BAD_STATEID:
5966 case -NFS4ERR_OLD_STATEID:
faf5f49c 5967 case -NFS4ERR_STALE_STATEID:
425c1d4e
TM		 5968 if (!nfs4_stateid_match(&calldata->arg.stateid,
5969 &calldata->lsp->ls_stateid))
5970 rpc_restart_call_prepare(task);
faf5f49c
TM		 5971 break;
5972 default:
8478eaa1
N		 5973 if (nfs4_async_handle_error(task, calldata->server,
5974 NULL, NULL) == -EAGAIN)
d00c5d43 5975 rpc_restart_call_prepare(task);
faf5f49c 5976 }
2b1bc308 5977 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 5978}
5979
4ce70ada 5980static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 5981{
4ce70ada 5982 struct nfs4_unlockdata *calldata = data;
faf5f49c 5983
911d1aaf 5984 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 5985 goto out_wait;
425c1d4e 5986 nfs4_stateid_copy(&calldata->arg.stateid, &calldata->lsp->ls_stateid);
795a88c9 5987 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 5988 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 5989 goto out_no_action;
faf5f49c 5990 }
26e976a8 5991 calldata->timestamp = jiffies;
035168ab 5992 if (nfs4_setup_sequence(calldata->server,
a893693c 5993 &calldata->arg.seq_args,
2240a9e2
TM		 5994 &calldata->res.seq_res,
5995 task) != 0)
5996 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 5997 return;
5998out_no_action:
5999 task->tk_action = NULL;
6000out_wait:
6001 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 6002}
6003
963d8fe5 6004static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 6005 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 6006 .rpc_call_done = nfs4_locku_done,
06f814a3 6007 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 6008};
6009
a5d16a4d
TM		 6010static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
6011 struct nfs_open_context *ctx,
6012 struct nfs4_lock_state *lsp,
6013 struct nfs_seqid *seqid)
6014{
6015 struct nfs4_unlockdata *data;
5138fde0
TM		 6016 struct rpc_message msg = {
6017 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
6018 .rpc_cred = ctx->cred,
6019 };
c970aa85
TM		 6020 struct rpc_task_setup task_setup_data = {
6021 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 6022 .rpc_message = &msg,
c970aa85 6023 .callback_ops = &nfs4_locku_ops,
101070ca 6024 .workqueue = nfsiod_workqueue,
c970aa85
TM		 6025 .flags = RPC_TASK_ASYNC,
6026 };
a5d16a4d 6027
fa940720
WAA		 6028 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
6029 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
6030
137d6aca
FF		 6031 /* Ensure this is an unlock - when canceling a lock, the
6032 * canceled lock is passed in, and it won't be an unlock.
6033 */
6034 fl->fl_type = F_UNLCK;
6035
a5d16a4d
TM		 6036 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
6037 if (data == NULL) {
6038 nfs_free_seqid(seqid);
6039 return ERR_PTR(-ENOMEM);
6040 }
6041
a9c92d6b 6042 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 6043 msg.rpc_argp = &data->arg;
6044 msg.rpc_resp = &data->res;
c970aa85
TM		 6045 task_setup_data.callback_data = data;
6046 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 6047}
6048
faf5f49c
TM		 6049static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
6050{
65b62a29
TM		 6051 struct inode *inode = state->inode;
6052 struct nfs4_state_owner *sp = state->owner;
6053 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 6054 struct nfs_seqid *seqid;
1da177e4 6055 struct nfs4_lock_state *lsp;
06f814a3 6056 struct rpc_task *task;
b4019c0e 6057 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
06f814a3 6058 int status = 0;
536ff0f8 6059 unsigned char fl_flags = request->fl_flags;
faf5f49c 6060
8d0a8a9d 6061 status = nfs4_set_lock_state(state, request);
9b073574
TM		 6062 /* Unlock _before_ we do the RPC call */
6063 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 6064 /* Exclude nfs_delegation_claim_locks() */
6065 mutex_lock(&sp->so_delegreturn_mutex);
6066 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57 6067 down_read(&nfsi->rwsem);
75575ddf 6068 if (locks_lock_inode_wait(inode, request) == -ENOENT) {
19e03c57 6069 up_read(&nfsi->rwsem);
65b62a29 6070 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 6071 goto out;
19e03c57
TM		 6072 }
6073 up_read(&nfsi->rwsem);
65b62a29 6074 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 6075 if (status != 0)
9b073574
TM		 6076 goto out;
6077 /* Is this a delegated lock? */
8d0a8a9d 6078 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 6079 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
6080 goto out;
b4019c0e
TM		 6081 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid;
6082 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 6083 status = -ENOMEM;
badc76dd 6084 if (IS_ERR(seqid))
9b073574 6085 goto out;
cd3758e3 6086 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 6087 status = PTR_ERR(task);
6088 if (IS_ERR(task))
9b073574 6089 goto out;
a5d16a4d 6090 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 6091 rpc_put_task(task);
9b073574 6092out:
536ff0f8 6093 request->fl_flags = fl_flags;
d1b748a5 6094 trace_nfs4_unlock(request, state, F_SETLK, status);
1da177e4
LT		 6095 return status;
6096}
6097
a5d16a4d
TM		 6098struct nfs4_lockdata {
6099 struct nfs_lock_args arg;
6100 struct nfs_lock_res res;
6101 struct nfs4_lock_state *lsp;
6102 struct nfs_open_context *ctx;
6103 struct file_lock fl;
26e976a8 6104 unsigned long timestamp;
a5d16a4d
TM		 6105 int rpc_status;
6106 int cancelled;
66179efe 6107 struct nfs_server *server;
a5d16a4d
TM		 6108};
6109
6110static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 6111 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
6112 gfp_t gfp_mask)
1da177e4 6113{
a5d16a4d
TM		 6114 struct nfs4_lockdata *p;
6115 struct inode *inode = lsp->ls_state->inode;
1da177e4 6116 struct nfs_server *server = NFS_SERVER(inode);
b4019c0e 6117 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
a5d16a4d 6118
8535b2be 6119 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 6120 if (p == NULL)
6121 return NULL;
6122
6123 p->arg.fh = NFS_FH(inode);
6124 p->arg.fl = &p->fl;
8535b2be 6125 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
badc76dd 6126 if (IS_ERR(p->arg.open_seqid))
2f74c0a0 6127 goto out_free;
b4019c0e
TM		 6128 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
6129 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask);
badc76dd 6130 if (IS_ERR(p->arg.lock_seqid))
2f74c0a0 6131 goto out_free_seqid;
7539bbab 6132 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 6133 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 6134 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 6135 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 6136 p->lsp = lsp;
66179efe 6137 p->server = server;
a5d16a4d
TM		 6138 atomic_inc(&lsp->ls_count);
6139 p->ctx = get_nfs_open_context(ctx);
6140 memcpy(&p->fl, fl, sizeof(p->fl));
6141 return p;
2f74c0a0
TM		 6142out_free_seqid:
6143 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 6144out_free:
6145 kfree(p);
6146 return NULL;
6147}
6148
6149static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
6150{
6151 struct nfs4_lockdata *data = calldata;
6152 struct nfs4_state *state = data->lsp->ls_state;
06735b34 6153
3110ff80 6154 dprintk("%s: begin!\n", __func__);
2f74c0a0 6155 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 6156 goto out_wait;
a5d16a4d 6157 /* Do we need to do an open_to_lock_owner? */
6b447539 6158 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) {
8fe72bac 6159 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 6160 goto out_release_lock_seqid;
8fe72bac 6161 }
425c1d4e
TM		 6162 nfs4_stateid_copy(&data->arg.open_stateid,
6163 &state->open_stateid);
a5d16a4d 6164 data->arg.new_lock_owner = 1;
c1d51931 6165 data->res.open_seqid = data->arg.open_seqid;
425c1d4e 6166 } else {
2f74c0a0 6167 data->arg.new_lock_owner = 0;
425c1d4e
TM		 6168 nfs4_stateid_copy(&data->arg.lock_stateid,
6169 &data->lsp->ls_stateid);
6170 }
5d422301
TM		 6171 if (!nfs4_valid_open_stateid(state)) {
6172 data->rpc_status = -EBADF;
6173 task->tk_action = NULL;
6174 goto out_release_open_seqid;
6175 }
26e976a8 6176 data->timestamp = jiffies;
035168ab
TM		 6177 if (nfs4_setup_sequence(data->server,
6178 &data->arg.seq_args,
2240a9e2 6179 &data->res.seq_res,
d9afbd1b 6180 task) == 0)
66179efe 6181 return;
5d422301 6182out_release_open_seqid:
2240a9e2
TM		 6183 nfs_release_seqid(data->arg.open_seqid);
6184out_release_lock_seqid:
6185 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 6186out_wait:
6187 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 6188 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 6189}
6190
a5d16a4d
TM		 6191static void nfs4_lock_done(struct rpc_task *task, void *calldata)
6192{
6193 struct nfs4_lockdata *data = calldata;
39071e6f 6194 struct nfs4_lock_state *lsp = data->lsp;
a5d16a4d 6195
3110ff80 6196 dprintk("%s: begin!\n", __func__);
a5d16a4d 6197
14516c3a
TM		 6198 if (!nfs4_sequence_done(task, &data->res.seq_res))
6199 return;
66179efe 6200
a5d16a4d 6201 data->rpc_status = task->tk_status;
425c1d4e
TM		 6202 switch (task->tk_status) {
6203 case 0:
2b0143b5 6204 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)),
39071e6f 6205 data->timestamp);
c69899a1
TM		 6206 if (data->arg.new_lock) {
6207 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS);
75575ddf 6208 if (locks_lock_inode_wait(lsp->ls_state->inode, &data->fl) < 0) {
c69899a1
TM		 6209 rpc_restart_call_prepare(task);
6210 break;
6211 }
6212 }
39071e6f
TM		 6213 if (data->arg.new_lock_owner != 0) {
6214 nfs_confirm_seqid(&lsp->ls_seqid, 0);
6215 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid);
6216 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
6217 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid))
6218 rpc_restart_call_prepare(task);
425c1d4e
TM		 6219 break;
6220 case -NFS4ERR_BAD_STATEID:
6221 case -NFS4ERR_OLD_STATEID:
6222 case -NFS4ERR_STALE_STATEID:
6223 case -NFS4ERR_EXPIRED:
6224 if (data->arg.new_lock_owner != 0) {
6225 if (!nfs4_stateid_match(&data->arg.open_stateid,
6226 &lsp->ls_state->open_stateid))
6227 rpc_restart_call_prepare(task);
6228 } else if (!nfs4_stateid_match(&data->arg.lock_stateid,
6229 &lsp->ls_stateid))
6230 rpc_restart_call_prepare(task);
a5d16a4d 6231 }
3110ff80 6232 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 6233}
6234
6235static void nfs4_lock_release(void *calldata)
6236{
6237 struct nfs4_lockdata *data = calldata;
6238
3110ff80 6239 dprintk("%s: begin!\n", __func__);
2f74c0a0 6240 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 6241 if (data->cancelled != 0) {
6242 struct rpc_task *task;
6243 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
6244 data->arg.lock_seqid);
6245 if (!IS_ERR(task))
bf294b41 6246 rpc_put_task_async(task);
3110ff80 6247 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 6248 } else
6249 nfs_free_seqid(data->arg.lock_seqid);
6250 nfs4_put_lock_state(data->lsp);
6251 put_nfs_open_context(data->ctx);
6252 kfree(data);
3110ff80 6253 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 6254}
6255
6256static const struct rpc_call_ops nfs4_lock_ops = {
6257 .rpc_call_prepare = nfs4_lock_prepare,
6258 .rpc_call_done = nfs4_lock_done,
6259 .rpc_release = nfs4_lock_release,
6260};
6261
2bee72a6
TM		 6262static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
6263{
2bee72a6
TM		 6264 switch (error) {
6265 case -NFS4ERR_ADMIN_REVOKED:
d7f3e4bf 6266 case -NFS4ERR_EXPIRED:
2bee72a6 6267 case -NFS4ERR_BAD_STATEID:
ecac799a 6268 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 6269 if (new_lock_owner != 0 ||
795a88c9 6270 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 6271 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 6272 break;
6273 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 6274 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a 6275 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 6276 };
6277}
6278
afe6c27c 6279static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 6280{
6281 struct nfs4_lockdata *data;
6282 struct rpc_task *task;
5138fde0
TM		 6283 struct rpc_message msg = {
6284 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
6285 .rpc_cred = state->owner->so_cred,
6286 };
c970aa85
TM		 6287 struct rpc_task_setup task_setup_data = {
6288 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 6289 .rpc_message = &msg,
c970aa85 6290 .callback_ops = &nfs4_lock_ops,
101070ca 6291 .workqueue = nfsiod_workqueue,
c970aa85
TM		 6292 .flags = RPC_TASK_ASYNC,
6293 };
a5d16a4d
TM		 6294 int ret;
6295
3110ff80 6296 dprintk("%s: begin!\n", __func__);
cd3758e3 6297 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 6298 fl->fl_u.nfs4_fl.owner,
6299 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 6300 if (data == NULL)
6301 return -ENOMEM;
6302 if (IS_SETLKW(cmd))
6303 data->arg.block = 1;
a9c92d6b 6304 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 6305 msg.rpc_argp = &data->arg;
6306 msg.rpc_resp = &data->res;
c970aa85 6307 task_setup_data.callback_data = data;
8fe72bac
TM		 6308 if (recovery_type > NFS_LOCK_NEW) {
6309 if (recovery_type == NFS_LOCK_RECLAIM)
6310 data->arg.reclaim = NFS_LOCK_RECLAIM;
6311 nfs4_set_sequence_privileged(&data->arg.seq_args);
c69899a1
TM		 6312 } else
6313 data->arg.new_lock = 1;
c970aa85 6314 task = rpc_run_task(&task_setup_data);
7a1218a2 6315 if (IS_ERR(task))
a5d16a4d 6316 return PTR_ERR(task);
a5d16a4d
TM		 6317 ret = nfs4_wait_for_completion_rpc_task(task);
6318 if (ret == 0) {
6319 ret = data->rpc_status;
2bee72a6
TM		 6320 if (ret)
6321 nfs4_handle_setlk_error(data->server, data->lsp,
6322 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 6323 } else
6324 data->cancelled = 1;
e6b3c4db 6325 rpc_put_task(task);
3110ff80 6326 dprintk("%s: done, ret = %d!\n", __func__, ret);
48c9579a 6327 trace_nfs4_set_lock(fl, state, &data->res.stateid, cmd, ret);
a5d16a4d 6328 return ret;
1da177e4
LT		 6329}
6330
6331static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
6332{
202b50dc 6333 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 6334 struct nfs4_exception exception = {
6335 .inode = state->inode,
6336 };
202b50dc
TM		 6337 int err;
6338
6339 do {
42a2d13e
TM		 6340 /* Cache the lock if possible... */
6341 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
6342 return 0;
afe6c27c 6343 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 6344 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 6345 break;
6346 nfs4_handle_exception(server, err, &exception);
6347 } while (exception.retry);
6348 return err;
1da177e4
LT		 6349}
6350
6351static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
6352{
202b50dc 6353 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 6354 struct nfs4_exception exception = {
6355 .inode = state->inode,
6356 };
202b50dc
TM		 6357 int err;
6358
6bfc93ef
TM		 6359 err = nfs4_set_lock_state(state, request);
6360 if (err != 0)
6361 return err;
f6de7a39 6362 if (!recover_lost_locks) {
ef1820f9
N		 6363 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
6364 return 0;
6365 }
202b50dc 6366 do {
42a2d13e
TM		 6367 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
6368 return 0;
afe6c27c 6369 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 6370 switch (err) {
6371 default:
6372 goto out;
6373 case -NFS4ERR_GRACE:
6374 case -NFS4ERR_DELAY:
6375 nfs4_handle_exception(server, err, &exception);
6376 err = 0;
6377 }
202b50dc 6378 } while (exception.retry);
a9ed2e25 6379out:
202b50dc 6380 return err;
1da177e4
LT		 6381}
6382
f062eb6c 6383#if defined(CONFIG_NFS_V4_1)
b01dd1d8
BS		 6384static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
6385{
c5896fc8
TM		 6386 struct nfs4_lock_state *lsp;
6387 int status;
b01dd1d8 6388
c5896fc8
TM		 6389 status = nfs4_set_lock_state(state, request);
6390 if (status != 0)
6391 return status;
6392 lsp = request->fl_u.nfs4_fl.owner;
6393 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) ||
6394 test_bit(NFS_LOCK_LOST, &lsp->ls_flags))
6395 return 0;
6396 status = nfs4_lock_expired(state, request);
eb64cf96 6397 return status;
f062eb6c
BS		 6398}
6399#endif
6400
1da177e4
LT		 6401static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6402{
19e03c57 6403 struct nfs_inode *nfsi = NFS_I(state->inode);
11476e9d 6404 struct nfs4_state_owner *sp = state->owner;
01c3b861 6405 unsigned char fl_flags = request->fl_flags;
1ea67dbd 6406 int status;
1da177e4 6407
01c3b861 6408 request->fl_flags |= FL_ACCESS;
75575ddf 6409 status = locks_lock_inode_wait(state->inode, request);
01c3b861
TM		 6410 if (status < 0)
6411 goto out;
11476e9d 6412 mutex_lock(&sp->so_delegreturn_mutex);
19e03c57 6413 down_read(&nfsi->rwsem);
01c3b861 6414 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 6415 /* Yes: cache locks! */
01c3b861 6416 /* ...but avoid races with delegation recall... */
19e03c57 6417 request->fl_flags = fl_flags & ~FL_SLEEP;
75575ddf 6418 status = locks_lock_inode_wait(state->inode, request);
c69899a1 6419 up_read(&nfsi->rwsem);
11476e9d 6420 mutex_unlock(&sp->so_delegreturn_mutex);
9a99af49 6421 goto out;
9a99af49 6422 }
19e03c57 6423 up_read(&nfsi->rwsem);
11476e9d 6424 mutex_unlock(&sp->so_delegreturn_mutex);
c69899a1 6425 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
01c3b861
TM		 6426out:
6427 request->fl_flags = fl_flags;
1da177e4
LT		 6428 return status;
6429}
6430
6431static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6432{
a1d0b5ee
TM		 6433 struct nfs4_exception exception = {
6434 .state = state,
05ffe24f 6435 .inode = state->inode,
a1d0b5ee 6436 };
1da177e4
LT		 6437 int err;
6438
6439 do {
965b5d67
TM		 6440 err = _nfs4_proc_setlk(state, cmd, request);
6441 if (err == -NFS4ERR_DENIED)
6442 err = -EAGAIN;
1da177e4 6443 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 6444 err, &exception);
1da177e4
LT		 6445 } while (exception.retry);
6446 return err;
6447}
6448
d2f3a7f9
JL		 6449#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
6450#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
6451
6452static int
a1d617d8
JL		 6453nfs4_retry_setlk_simple(struct nfs4_state *state, int cmd,
6454 struct file_lock *request)
d2f3a7f9
JL		 6455{
6456 int status = -ERESTARTSYS;
6457 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
6458
6459 while(!signalled()) {
6460 status = nfs4_proc_setlk(state, cmd, request);
6461 if ((status != -EAGAIN) || IS_SETLK(cmd))
6462 break;
6463 freezable_schedule_timeout_interruptible(timeout);
6464 timeout *= 2;
6465 timeout = min_t(unsigned long, NFS4_LOCK_MAXTIMEOUT, timeout);
6466 status = -ERESTARTSYS;
6467 }
6468 return status;
6469}
6470
a1d617d8
JL		 6471#ifdef CONFIG_NFS_V4_1
6472struct nfs4_lock_waiter {
6473 struct task_struct *task;
6474 struct inode *inode;
6475 struct nfs_lowner *owner;
6476 bool notified;
6477};
6478
6479static int
6480nfs4_wake_lock_waiter(wait_queue_t *wait, unsigned int mode, int flags, void *key)
6481{
6482 int ret;
6483 struct cb_notify_lock_args *cbnl = key;
6484 struct nfs4_lock_waiter *waiter = wait->private;
6485 struct nfs_lowner *lowner = &cbnl->cbnl_owner,
6486 *wowner = waiter->owner;
6487
6488 /* Only wake if the callback was for the same owner */
6489 if (lowner->clientid != wowner->clientid ||
6490 lowner->id != wowner->id ||
6491 lowner->s_dev != wowner->s_dev)
6492 return 0;
6493
6494 /* Make sure it's for the right inode */
6495 if (nfs_compare_fh(NFS_FH(waiter->inode), &cbnl->cbnl_fh))
6496 return 0;
6497
6498 waiter->notified = true;
6499
6500 /* override "private" so we can use default_wake_function */
6501 wait->private = waiter->task;
6502 ret = autoremove_wake_function(wait, mode, flags, key);
6503 wait->private = waiter;
6504 return ret;
6505}
6506
6507static int
6508nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6509{
6510 int status = -ERESTARTSYS;
6511 unsigned long flags;
6512 struct nfs4_lock_state *lsp = request->fl_u.nfs4_fl.owner;
6513 struct nfs_server *server = NFS_SERVER(state->inode);
6514 struct nfs_client *clp = server->nfs_client;
6515 wait_queue_head_t *q = &clp->cl_lock_waitq;
6516 struct nfs_lowner owner = { .clientid = clp->cl_clientid,
6517 .id = lsp->ls_seqid.owner_id,
6518 .s_dev = server->s_dev };
6519 struct nfs4_lock_waiter waiter = { .task = current,
6520 .inode = state->inode,
6521 .owner = &owner,
6522 .notified = false };
6523 wait_queue_t wait;
6524
6525 /* Don't bother with waitqueue if we don't expect a callback */
6526 if (!test_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags))
6527 return nfs4_retry_setlk_simple(state, cmd, request);
6528
6529 init_wait(&wait);
6530 wait.private = &waiter;
6531 wait.func = nfs4_wake_lock_waiter;
6532 add_wait_queue(q, &wait);
6533
6534 while(!signalled()) {
6535 status = nfs4_proc_setlk(state, cmd, request);
6536 if ((status != -EAGAIN) || IS_SETLK(cmd))
6537 break;
6538
6539 status = -ERESTARTSYS;
6540 spin_lock_irqsave(&q->lock, flags);
6541 if (waiter.notified) {
6542 spin_unlock_irqrestore(&q->lock, flags);
6543 continue;
6544 }
6545 set_current_state(TASK_INTERRUPTIBLE);
6546 spin_unlock_irqrestore(&q->lock, flags);
6547
6548 freezable_schedule_timeout_interruptible(NFS4_LOCK_MAXTIMEOUT);
6549 }
6550
6551 finish_wait(q, &wait);
6552 return status;
6553}
6554#else /* !CONFIG_NFS_V4_1 */
6555static inline int
6556nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6557{
6558 return nfs4_retry_setlk_simple(state, cmd, request);
6559}
6560#endif
6561
1da177e4
LT		 6562static int
6563nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
6564{
6565 struct nfs_open_context *ctx;
6566 struct nfs4_state *state;
1da177e4
LT		 6567 int status;
6568
6569 /* verify open state */
cd3758e3 6570 ctx = nfs_file_open_context(filp);
1da177e4
LT		 6571 state = ctx->state;
6572
6573 if (request->fl_start < 0 || request->fl_end < 0)
6574 return -EINVAL;
6575
d953126a
TM		 6576 if (IS_GETLK(cmd)) {
6577 if (state != NULL)
6578 return nfs4_proc_getlk(state, F_GETLK, request);
6579 return 0;
6580 }
1da177e4
LT		 6581
6582 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
6583 return -EINVAL;
6584
d953126a
TM		 6585 if (request->fl_type == F_UNLCK) {
6586 if (state != NULL)
6587 return nfs4_proc_unlck(state, cmd, request);
6588 return 0;
6589 }
1da177e4 6590
d953126a
TM		 6591 if (state == NULL)
6592 return -ENOLCK;
1ea67dbd
JL		 6593
6594 if ((request->fl_flags & FL_POSIX) &&
6595 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
6596 return -ENOLCK;
6597
55725513
TM		 6598 /*
6599 * Don't rely on the VFS having checked the file open mode,
6600 * since it won't do this for flock() locks.
6601 */
f44106e2 6602 switch (request->fl_type) {
55725513
TM		 6603 case F_RDLCK:
6604 if (!(filp->f_mode & FMODE_READ))
6605 return -EBADF;
6606 break;
6607 case F_WRLCK:
6608 if (!(filp->f_mode & FMODE_WRITE))
6609 return -EBADF;
6610 }
6611
1ea67dbd
JL		 6612 status = nfs4_set_lock_state(state, request);
6613 if (status != 0)
6614 return status;
6615
d2f3a7f9 6616 return nfs4_retry_setlk(state, cmd, request);
1da177e4
LT		 6617}
6618
db4f2e63 6619int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 6620{
6621 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 6622 int err;
6623
6624 err = nfs4_set_lock_state(state, fl);
6625 if (err != 0)
db4f2e63 6626 return err;
4a706fa0 6627 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 6628 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 6629}
6b3b5496 6630
cf470c3e
TM		 6631struct nfs_release_lockowner_data {
6632 struct nfs4_lock_state *lsp;
5ae67c4f 6633 struct nfs_server *server;
cf470c3e 6634 struct nfs_release_lockowner_args args;
b7e63a10 6635 struct nfs_release_lockowner_res res;
60ea6812 6636 unsigned long timestamp;
cf470c3e
TM		 6637};
6638
fbd4bfd1
CL		 6639static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
6640{
6641 struct nfs_release_lockowner_data *data = calldata;
5b53dc88 6642 struct nfs_server *server = data->server;
cb04ad2a
PT		 6643 nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
6644 &data->args.seq_args, &data->res.seq_res, task);
5b53dc88 6645 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
60ea6812 6646 data->timestamp = jiffies;
fbd4bfd1
CL		 6647}
6648
6649static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
6650{
6651 struct nfs_release_lockowner_data *data = calldata;
60ea6812
CL		 6652 struct nfs_server *server = data->server;
6653
b7e63a10 6654 nfs40_sequence_done(task, &data->res.seq_res);
60ea6812
CL		 6655
6656 switch (task->tk_status) {
6657 case 0:
6658 renew_lease(server, data->timestamp);
6659 break;
6660 case -NFS4ERR_STALE_CLIENTID:
6661 case -NFS4ERR_EXPIRED:
5b53dc88
KM		 6662 nfs4_schedule_lease_recovery(server->nfs_client);
6663 break;
60ea6812
CL		 6664 case -NFS4ERR_LEASE_MOVED:
6665 case -NFS4ERR_DELAY:
8478eaa1
N		 6666 if (nfs4_async_handle_error(task, server,
6667 NULL, NULL) == -EAGAIN)
60ea6812
CL		 6668 rpc_restart_call_prepare(task);
6669 }
fbd4bfd1
CL		 6670}
6671
d3c7b7cc
TM		 6672static void nfs4_release_lockowner_release(void *calldata)
6673{
cf470c3e 6674 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 6675 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 6676 kfree(calldata);
6677}
6678
17280175 6679static const struct rpc_call_ops nfs4_release_lockowner_ops = {
fbd4bfd1
CL		 6680 .rpc_call_prepare = nfs4_release_lockowner_prepare,
6681 .rpc_call_done = nfs4_release_lockowner_done,
d3c7b7cc
TM		 6682 .rpc_release = nfs4_release_lockowner_release,
6683};
6684
f1cdae87
JL		 6685static void
6686nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 6687{
cf470c3e 6688 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 6689 struct rpc_message msg = {
6690 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
6691 };
6692
6693 if (server->nfs_client->cl_mvops->minor_version != 0)
f1cdae87 6694 return;
fbd4bfd1 6695
cf470c3e
TM		 6696 data = kmalloc(sizeof(*data), GFP_NOFS);
6697 if (!data)
f1cdae87 6698 return;
cf470c3e 6699 data->lsp = lsp;
5ae67c4f 6700 data->server = server;
cf470c3e
TM		 6701 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6702 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
6703 data->args.lock_owner.s_dev = server->s_dev;
fbd4bfd1 6704
cf470c3e 6705 msg.rpc_argp = &data->args;
b7e63a10
TM		 6706 msg.rpc_resp = &data->res;
6707 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
cf470c3e 6708 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
d3c7b7cc
TM		 6709}
6710
aa1870af
BF		 6711#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
6712
d9a82a04 6713static int nfs4_xattr_set_nfs4_acl(const struct xattr_handler *handler,
59301226
AV		 6714 struct dentry *unused, struct inode *inode,
6715 const char *key, const void *buf,
6716 size_t buflen, int flags)
6b3b5496 6717{
59301226 6718 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 6719}
6720
d9a82a04 6721static int nfs4_xattr_get_nfs4_acl(const struct xattr_handler *handler,
b296821a
AV		 6722 struct dentry *unused, struct inode *inode,
6723 const char *key, void *buf, size_t buflen)
6b3b5496 6724{
b296821a 6725 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 6726}
6727
764a5c6b 6728static bool nfs4_xattr_list_nfs4_acl(struct dentry *dentry)
6b3b5496 6729{
764a5c6b 6730 return nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry)));
6b3b5496
BF		 6731}
6732
c9bccef6 6733#ifdef CONFIG_NFS_V4_SECURITY_LABEL
c9bccef6 6734
d9a82a04 6735static int nfs4_xattr_set_nfs4_label(const struct xattr_handler *handler,
59301226
AV		 6736 struct dentry *unused, struct inode *inode,
6737 const char *key, const void *buf,
6738 size_t buflen, int flags)
c9bccef6
DQ		 6739{
6740 if (security_ismaclabel(key))
59301226 6741 return nfs4_set_security_label(inode, buf, buflen);
c9bccef6
DQ		 6742
6743 return -EOPNOTSUPP;
6744}
6745
d9a82a04 6746static int nfs4_xattr_get_nfs4_label(const struct xattr_handler *handler,
b296821a
AV		 6747 struct dentry *unused, struct inode *inode,
6748 const char *key, void *buf, size_t buflen)
c9bccef6
DQ		 6749{
6750 if (security_ismaclabel(key))
b296821a 6751 return nfs4_get_security_label(inode, buf, buflen);
c9bccef6
DQ		 6752 return -EOPNOTSUPP;
6753}
6754
c4803c49
AG		 6755static ssize_t
6756nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
c9bccef6 6757{
c4803c49 6758 int len = 0;
c9bccef6 6759
c4803c49
AG		 6760 if (nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) {
6761 len = security_inode_listsecurity(inode, list, list_len);
6762 if (list_len && len > list_len)
6763 return -ERANGE;
c9bccef6
DQ		 6764 }
6765 return len;
6766}
6767
6768static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
6769 .prefix = XATTR_SECURITY_PREFIX,
c9bccef6
DQ		 6770 .get = nfs4_xattr_get_nfs4_label,
6771 .set = nfs4_xattr_set_nfs4_label,
6772};
c9bccef6 6773
c4803c49
AG		 6774#else
6775
6776static ssize_t
6777nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
6778{
6779 return 0;
6780}
6781
6782#endif
c9bccef6 6783
533eb461
AA		 6784/*
6785 * nfs_fhget will use either the mounted_on_fileid or the fileid
6786 */
69aaaae1
TM		 6787static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6788{
533eb461
AA		 6789 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6790 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6791 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 6792 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 6793 return;
6794
6795 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 6796 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 6797 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6798 fattr->nlink = 2;
6799}
6800
f05d147f
BS		 6801static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6802 const struct qstr *name,
6803 struct nfs4_fs_locations *fs_locations,
6804 struct page *page)
683b57b4
TM		 6805{
6806 struct nfs_server *server = NFS_SERVER(dir);
a09df2ca 6807 u32 bitmask[3] = {
361e624f 6808 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 6809 };
6810 struct nfs4_fs_locations_arg args = {
6811 .dir_fh = NFS_FH(dir),
c228fd3a 6812 .name = name,
683b57b4
TM		 6813 .page = page,
6814 .bitmask = bitmask,
6815 };
22958463
BH		 6816 struct nfs4_fs_locations_res res = {
6817 .fs_locations = fs_locations,
6818 };
683b57b4
TM		 6819 struct rpc_message msg = {
6820 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6821 .rpc_argp = &args,
22958463 6822 .rpc_resp = &res,
683b57b4
TM		 6823 };
6824 int status;
6825
3110ff80 6826 dprintk("%s: start\n", __func__);
533eb461
AA		 6827
6828 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6829 * is not supported */
6830 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6831 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6832 else
6833 bitmask[0] |= FATTR4_WORD0_FILEID;
6834
c228fd3a 6835 nfs_fattr_init(&fs_locations->fattr);
683b57b4 6836 fs_locations->server = server;
830b8e33 6837 fs_locations->nlocations = 0;
f05d147f 6838 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 6839 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 6840 return status;
6841}
6842
f05d147f
BS		 6843int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6844 const struct qstr *name,
6845 struct nfs4_fs_locations *fs_locations,
6846 struct page *page)
db0a9593
BS		 6847{
6848 struct nfs4_exception exception = { };
6849 int err;
6850 do {
078ea3df
TM		 6851 err = _nfs4_proc_fs_locations(client, dir, name,
6852 fs_locations, page);
6853 trace_nfs4_get_fs_locations(dir, name, err);
6854 err = nfs4_handle_exception(NFS_SERVER(dir), err,
db0a9593
BS		 6855 &exception);
6856 } while (exception.retry);
6857 return err;
6858}
6859
b03d735b
CL		 6860/*
6861 * This operation also signals the server that this client is
6862 * performing migration recovery. The server can stop returning
6863 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6864 * appended to this compound to identify the client ID which is
6865 * performing recovery.
6866 */
6867static int _nfs40_proc_get_locations(struct inode *inode,
6868 struct nfs4_fs_locations *locations,
6869 struct page *page, struct rpc_cred *cred)
6870{
6871 struct nfs_server *server = NFS_SERVER(inode);
6872 struct rpc_clnt *clnt = server->client;
6873 u32 bitmask[2] = {
6874 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6875 };
6876 struct nfs4_fs_locations_arg args = {
6877 .clientid = server->nfs_client->cl_clientid,
6878 .fh = NFS_FH(inode),
6879 .page = page,
6880 .bitmask = bitmask,
6881 .migration = 1, /* skip LOOKUP */
6882 .renew = 1, /* append RENEW */
6883 };
6884 struct nfs4_fs_locations_res res = {
6885 .fs_locations = locations,
6886 .migration = 1,
6887 .renew = 1,
6888 };
6889 struct rpc_message msg = {
6890 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6891 .rpc_argp = &args,
6892 .rpc_resp = &res,
6893 .rpc_cred = cred,
6894 };
6895 unsigned long now = jiffies;
6896 int status;
6897
6898 nfs_fattr_init(&locations->fattr);
6899 locations->server = server;
6900 locations->nlocations = 0;
6901
6902 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6903 nfs4_set_sequence_privileged(&args.seq_args);
6904 status = nfs4_call_sync_sequence(clnt, server, &msg,
6905 &args.seq_args, &res.seq_res);
6906 if (status)
6907 return status;
6908
6909 renew_lease(server, now);
6910 return 0;
6911}
6912
6913#ifdef CONFIG_NFS_V4_1
6914
6915/*
6916 * This operation also signals the server that this client is
6917 * performing migration recovery. The server can stop asserting
6918 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6919 * performing this operation is identified in the SEQUENCE
6920 * operation in this compound.
6921 *
6922 * When the client supports GETATTR(fs_locations_info), it can
6923 * be plumbed in here.
6924 */
6925static int _nfs41_proc_get_locations(struct inode *inode,
6926 struct nfs4_fs_locations *locations,
6927 struct page *page, struct rpc_cred *cred)
6928{
6929 struct nfs_server *server = NFS_SERVER(inode);
6930 struct rpc_clnt *clnt = server->client;
6931 u32 bitmask[2] = {
6932 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6933 };
6934 struct nfs4_fs_locations_arg args = {
6935 .fh = NFS_FH(inode),
6936 .page = page,
6937 .bitmask = bitmask,
6938 .migration = 1, /* skip LOOKUP */
6939 };
6940 struct nfs4_fs_locations_res res = {
6941 .fs_locations = locations,
6942 .migration = 1,
6943 };
6944 struct rpc_message msg = {
6945 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6946 .rpc_argp = &args,
6947 .rpc_resp = &res,
6948 .rpc_cred = cred,
6949 };
6950 int status;
6951
6952 nfs_fattr_init(&locations->fattr);
6953 locations->server = server;
6954 locations->nlocations = 0;
6955
6956 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6957 nfs4_set_sequence_privileged(&args.seq_args);
6958 status = nfs4_call_sync_sequence(clnt, server, &msg,
6959 &args.seq_args, &res.seq_res);
6960 if (status == NFS4_OK &&
6961 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6962 status = -NFS4ERR_LEASE_MOVED;
6963 return status;
6964}
6965
6966#endif /* CONFIG_NFS_V4_1 */
6967
6968/**
6969 * nfs4_proc_get_locations - discover locations for a migrated FSID
6970 * @inode: inode on FSID that is migrating
6971 * @locations: result of query
6972 * @page: buffer
6973 * @cred: credential to use for this operation
6974 *
6975 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6976 * operation failed, or a negative errno if a local error occurred.
6977 *
6978 * On success, "locations" is filled in, but if the server has
6979 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6980 * asserted.
6981 *
6982 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6983 * from this client that require migration recovery.
6984 */
6985int nfs4_proc_get_locations(struct inode *inode,
6986 struct nfs4_fs_locations *locations,
6987 struct page *page, struct rpc_cred *cred)
6988{
6989 struct nfs_server *server = NFS_SERVER(inode);
6990 struct nfs_client *clp = server->nfs_client;
6991 const struct nfs4_mig_recovery_ops *ops =
6992 clp->cl_mvops->mig_recovery_ops;
6993 struct nfs4_exception exception = { };
6994 int status;
6995
6996 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6997 (unsigned long long)server->fsid.major,
6998 (unsigned long long)server->fsid.minor,
6999 clp->cl_hostname);
7000 nfs_display_fhandle(NFS_FH(inode), __func__);
7001
7002 do {
7003 status = ops->get_locations(inode, locations, page, cred);
7004 if (status != -NFS4ERR_DELAY)
7005 break;
7006 nfs4_handle_exception(server, status, &exception);
7007 } while (exception.retry);
7008 return status;
7009}
7010
44c99933
CL		 7011/*
7012 * This operation also signals the server that this client is
7013 * performing "lease moved" recovery. The server can stop
7014 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
7015 * is appended to this compound to identify the client ID which is
7016 * performing recovery.
7017 */
7018static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
7019{
7020 struct nfs_server *server = NFS_SERVER(inode);
7021 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
7022 struct rpc_clnt *clnt = server->client;
7023 struct nfs4_fsid_present_arg args = {
7024 .fh = NFS_FH(inode),
7025 .clientid = clp->cl_clientid,
7026 .renew = 1, /* append RENEW */
7027 };
7028 struct nfs4_fsid_present_res res = {
7029 .renew = 1,
7030 };
7031 struct rpc_message msg = {
7032 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
7033 .rpc_argp = &args,
7034 .rpc_resp = &res,
7035 .rpc_cred = cred,
7036 };
7037 unsigned long now = jiffies;
7038 int status;
7039
7040 res.fh = nfs_alloc_fhandle();
7041 if (res.fh == NULL)
7042 return -ENOMEM;
7043
7044 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
7045 nfs4_set_sequence_privileged(&args.seq_args);
7046 status = nfs4_call_sync_sequence(clnt, server, &msg,
7047 &args.seq_args, &res.seq_res);
7048 nfs_free_fhandle(res.fh);
7049 if (status)
7050 return status;
7051
7052 do_renew_lease(clp, now);
7053 return 0;
7054}
7055
7056#ifdef CONFIG_NFS_V4_1
7057
7058/*
7059 * This operation also signals the server that this client is
7060 * performing "lease moved" recovery. The server can stop asserting
7061 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
7062 * this operation is identified in the SEQUENCE operation in this
7063 * compound.
7064 */
7065static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
7066{
7067 struct nfs_server *server = NFS_SERVER(inode);
7068 struct rpc_clnt *clnt = server->client;
7069 struct nfs4_fsid_present_arg args = {
7070 .fh = NFS_FH(inode),
7071 };
7072 struct nfs4_fsid_present_res res = {
7073 };
7074 struct rpc_message msg = {
7075 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
7076 .rpc_argp = &args,
7077 .rpc_resp = &res,
7078 .rpc_cred = cred,
7079 };
7080 int status;
7081
7082 res.fh = nfs_alloc_fhandle();
7083 if (res.fh == NULL)
7084 return -ENOMEM;
7085
7086 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
7087 nfs4_set_sequence_privileged(&args.seq_args);
7088 status = nfs4_call_sync_sequence(clnt, server, &msg,
7089 &args.seq_args, &res.seq_res);
7090 nfs_free_fhandle(res.fh);
7091 if (status == NFS4_OK &&
7092 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
7093 status = -NFS4ERR_LEASE_MOVED;
7094 return status;
7095}
7096
7097#endif /* CONFIG_NFS_V4_1 */
7098
7099/**
7100 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
7101 * @inode: inode on FSID to check
7102 * @cred: credential to use for this operation
7103 *
7104 * Server indicates whether the FSID is present, moved, or not
7105 * recognized. This operation is necessary to clear a LEASE_MOVED
7106 * condition for this client ID.
7107 *
7108 * Returns NFS4_OK if the FSID is present on this server,
7109 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
7110 * NFS4ERR code if some error occurred on the server, or a
7111 * negative errno if a local failure occurred.
7112 */
7113int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
7114{
7115 struct nfs_server *server = NFS_SERVER(inode);
7116 struct nfs_client *clp = server->nfs_client;
7117 const struct nfs4_mig_recovery_ops *ops =
7118 clp->cl_mvops->mig_recovery_ops;
7119 struct nfs4_exception exception = { };
7120 int status;
7121
7122 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
7123 (unsigned long long)server->fsid.major,
7124 (unsigned long long)server->fsid.minor,
7125 clp->cl_hostname);
7126 nfs_display_fhandle(NFS_FH(inode), __func__);
7127
7128 do {
7129 status = ops->fsid_present(inode, cred);
7130 if (status != -NFS4ERR_DELAY)
7131 break;
7132 nfs4_handle_exception(server, status, &exception);
7133 } while (exception.retry);
7134 return status;
7135}
7136
5ec16a85 7137/**
a5250def
WAA		 7138 * If 'use_integrity' is true and the state managment nfs_client
7139 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
7140 * and the machine credential as per RFC3530bis and RFC5661 Security
7141 * Considerations sections. Otherwise, just use the user cred with the
7142 * filesystem's rpc_client.
5ec16a85 7143 */
a5250def 7144static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
5a5ea0d4
BS		 7145{
7146 int status;
7147 struct nfs4_secinfo_arg args = {
7148 .dir_fh = NFS_FH(dir),
7149 .name = name,
7150 };
7151 struct nfs4_secinfo_res res = {
7152 .flavors = flavors,
7153 };
7154 struct rpc_message msg = {
7155 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
7156 .rpc_argp = &args,
7157 .rpc_resp = &res,
7158 };
a5250def 7159 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
7cb852df 7160 struct rpc_cred *cred = NULL;
a5250def
WAA		 7161
7162 if (use_integrity) {
7163 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
7cb852df
WAA		 7164 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
7165 msg.rpc_cred = cred;
a5250def 7166 }
5a5ea0d4
BS		 7167
7168 dprintk("NFS call secinfo %s\n", name->name);
8b5bee2e
WAA		 7169
7170 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
7171 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
7172
a5250def
WAA		 7173 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
7174 &res.seq_res, 0);
5a5ea0d4 7175 dprintk("NFS reply secinfo: %d\n", status);
a5250def 7176
7cb852df
WAA		 7177 if (cred)
7178 put_rpccred(cred);
a5250def 7179
5a5ea0d4
BS		 7180 return status;
7181}
7182
72de53ec
BS		 7183int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
7184 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 7185{
7186 struct nfs4_exception exception = { };
7187 int err;
7188 do {
a5250def
WAA		 7189 err = -NFS4ERR_WRONGSEC;
7190
7191 /* try to use integrity protection with machine cred */
7192 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
7193 err = _nfs4_proc_secinfo(dir, name, flavors, true);
7194
7195 /*
7196 * if unable to use integrity protection, or SECINFO with
7197 * integrity protection returns NFS4ERR_WRONGSEC (which is
7198 * disallowed by spec, but exists in deployed servers) use
7199 * the current filesystem's rpc_client and the user cred.
7200 */
7201 if (err == -NFS4ERR_WRONGSEC)
7202 err = _nfs4_proc_secinfo(dir, name, flavors, false);
7203
078ea3df
TM		 7204 trace_nfs4_secinfo(dir, name, err);
7205 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5a5ea0d4
BS		 7206 &exception);
7207 } while (exception.retry);
7208 return err;
7209}
7210
557134a3 7211#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 7212/*
7213 * Check the exchange flags returned by the server for invalid flags, having
7214 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
7215 * DS flags set.
7216 */
7217static int nfs4_check_cl_exchange_flags(u32 flags)
7218{
7219 if (flags & ~EXCHGID4_FLAG_MASK_R)
7220 goto out_inval;
7221 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
7222 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
7223 goto out_inval;
7224 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
7225 goto out_inval;
7226 return NFS_OK;
7227out_inval:
7228 return -NFS4ERR_INVAL;
7229}
7230
78fe0f41 7231static bool
79d4e1f0
CL		 7232nfs41_same_server_scope(struct nfs41_server_scope *a,
7233 struct nfs41_server_scope *b)
78fe0f41
WAA		 7234{
7235 if (a->server_scope_sz == b->server_scope_sz &&
7236 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
7237 return true;
7238
7239 return false;
7240}
7241
02a95dee
AA		 7242static void
7243nfs4_bind_one_conn_to_session_done(struct rpc_task *task, void *calldata)
7244{
7245}
7246
7247static const struct rpc_call_ops nfs4_bind_one_conn_to_session_ops = {
7248 .rpc_call_done = &nfs4_bind_one_conn_to_session_done,
7249};
7250
7c44f1ae 7251/*
d9ddbf5d 7252 * nfs4_proc_bind_one_conn_to_session()
7c44f1ae
WAA		 7253 *
7254 * The 4.1 client currently uses the same TCP connection for the
7255 * fore and backchannel.
7256 */
d9ddbf5d
TM		 7257static
7258int nfs4_proc_bind_one_conn_to_session(struct rpc_clnt *clnt,
7259 struct rpc_xprt *xprt,
7260 struct nfs_client *clp,
7261 struct rpc_cred *cred)
7c44f1ae
WAA		 7262{
7263 int status;
71a097c6
TM		 7264 struct nfs41_bind_conn_to_session_args args = {
7265 .client = clp,
7266 .dir = NFS4_CDFC4_FORE_OR_BOTH,
7267 };
7c44f1ae
WAA		 7268 struct nfs41_bind_conn_to_session_res res;
7269 struct rpc_message msg = {
7270 .rpc_proc =
7271 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
71a097c6 7272 .rpc_argp = &args,
7c44f1ae 7273 .rpc_resp = &res,
2cf047c9 7274 .rpc_cred = cred,
7c44f1ae 7275 };
d9ddbf5d
TM		 7276 struct rpc_task_setup task_setup_data = {
7277 .rpc_client = clnt,
7278 .rpc_xprt = xprt,
02a95dee 7279 .callback_ops = &nfs4_bind_one_conn_to_session_ops,
d9ddbf5d
TM		 7280 .rpc_message = &msg,
7281 .flags = RPC_TASK_TIMEOUT,
7282 };
7283 struct rpc_task *task;
7c44f1ae
WAA		 7284
7285 dprintk("--> %s\n", __func__);
7c44f1ae 7286
71a097c6
TM		 7287 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id);
7288 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN))
7289 args.dir = NFS4_CDFC4_FORE;
7c44f1ae 7290
d9ddbf5d
TM		 7291 /* Do not set the backchannel flag unless this is clnt->cl_xprt */
7292 if (xprt != rcu_access_pointer(clnt->cl_xprt))
7293 args.dir = NFS4_CDFC4_FORE;
7294
7295 task = rpc_run_task(&task_setup_data);
7296 if (!IS_ERR(task)) {
7297 status = task->tk_status;
7298 rpc_put_task(task);
7299 } else
7300 status = PTR_ERR(task);
c6d01c6f 7301 trace_nfs4_bind_conn_to_session(clp, status);
7c44f1ae 7302 if (status == 0) {
71a097c6 7303 if (memcmp(res.sessionid.data,
7c44f1ae
WAA		 7304 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
7305 dprintk("NFS: %s: Session ID mismatch\n", __func__);
7306 status = -EIO;
71a097c6 7307 goto out;
7c44f1ae 7308 }
71a097c6 7309 if ((res.dir & args.dir) != res.dir || res.dir == 0) {
7c44f1ae
WAA		 7310 dprintk("NFS: %s: Unexpected direction from server\n",
7311 __func__);
7312 status = -EIO;
71a097c6 7313 goto out;
7c44f1ae 7314 }
71a097c6 7315 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) {
7c44f1ae
WAA		 7316 dprintk("NFS: %s: Server returned RDMA mode = true\n",
7317 __func__);
7318 status = -EIO;
71a097c6 7319 goto out;
7c44f1ae
WAA		 7320 }
7321 }
7c44f1ae
WAA		 7322out:
7323 dprintk("<-- %s status= %d\n", __func__, status);
7324 return status;
7325}
7326
d9ddbf5d
TM		 7327struct rpc_bind_conn_calldata {
7328 struct nfs_client *clp;
7329 struct rpc_cred *cred;
7330};
7331
7332static int
7333nfs4_proc_bind_conn_to_session_callback(struct rpc_clnt *clnt,
7334 struct rpc_xprt *xprt,
7335 void *calldata)
7336{
7337 struct rpc_bind_conn_calldata *p = calldata;
7338
7339 return nfs4_proc_bind_one_conn_to_session(clnt, xprt, p->clp, p->cred);
7340}
7341
7342int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7343{
7344 struct rpc_bind_conn_calldata data = {
7345 .clp = clp,
7346 .cred = cred,
7347 };
7348 return rpc_clnt_iterate_for_each_xprt(clp->cl_rpcclient,
7349 nfs4_proc_bind_conn_to_session_callback, &data);
7350}
7351
99fe60d0 7352/*
fa940720
WAA		 7353 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
7354 * and operations we'd like to see to enable certain features in the allow map
2031cd1a
WAA		 7355 */
7356static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
7357 .how = SP4_MACH_CRED,
7358 .enforce.u.words = {
7359 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
7360 1 << (OP_EXCHANGE_ID - 32) |
7361 1 << (OP_CREATE_SESSION - 32) |
7362 1 << (OP_DESTROY_SESSION - 32) |
7363 1 << (OP_DESTROY_CLIENTID - 32)
fa940720
WAA		 7364 },
7365 .allow.u.words = {
7366 [0] = 1 << (OP_CLOSE) |
99ade3c7 7367 1 << (OP_OPEN_DOWNGRADE) |
a0279625 7368 1 << (OP_LOCKU) |
99ade3c7 7369 1 << (OP_DELEGRETURN) |
a0279625 7370 1 << (OP_COMMIT),
8b5bee2e 7371 [1] = 1 << (OP_SECINFO - 32) |
3787d506 7372 1 << (OP_SECINFO_NO_NAME - 32) |
99ade3c7 7373 1 << (OP_LAYOUTRETURN - 32) |
3787d506 7374 1 << (OP_TEST_STATEID - 32) |
a0279625
WAA		 7375 1 << (OP_FREE_STATEID - 32) |
7376 1 << (OP_WRITE - 32)
2031cd1a
WAA		 7377 }
7378};
7379
7380/*
7381 * Select the state protection mode for client `clp' given the server results
7382 * from exchange_id in `sp'.
99fe60d0 7383 *
2031cd1a
WAA		 7384 * Returns 0 on success, negative errno otherwise.
7385 */
7386static int nfs4_sp4_select_mode(struct nfs_client *clp,
7387 struct nfs41_state_protection *sp)
7388{
7389 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
7390 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
7391 1 << (OP_EXCHANGE_ID - 32) |
7392 1 << (OP_CREATE_SESSION - 32) |
7393 1 << (OP_DESTROY_SESSION - 32) |
7394 1 << (OP_DESTROY_CLIENTID - 32)
7395 };
7396 unsigned int i;
7397
7398 if (sp->how == SP4_MACH_CRED) {
7399 /* Print state protect result */
7400 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
7401 for (i = 0; i <= LAST_NFS4_OP; i++) {
7402 if (test_bit(i, sp->enforce.u.longs))
7403 dfprintk(MOUNT, " enforce op %d\n", i);
7404 if (test_bit(i, sp->allow.u.longs))
7405 dfprintk(MOUNT, " allow op %d\n", i);
7406 }
7407
7408 /* make sure nothing is on enforce list that isn't supported */
7409 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
7410 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
7411 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
7412 return -EINVAL;
7413 }
7414 }
7415
7416 /*
7417 * Minimal mode - state operations are allowed to use machine
7418 * credential. Note this already happens by default, so the
7419 * client doesn't have to do anything more than the negotiation.
7420 *
7421 * NOTE: we don't care if EXCHANGE_ID is in the list -
7422 * we're already using the machine cred for exchange_id
7423 * and will never use a different cred.
7424 */
7425 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
7426 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
7427 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
7428 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
7429 dfprintk(MOUNT, "sp4_mach_cred:\n");
7430 dfprintk(MOUNT, " minimal mode enabled\n");
7431 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
7432 } else {
7433 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
7434 return -EINVAL;
7435 }
fa940720
WAA		 7436
7437 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
99ade3c7
AE		 7438 test_bit(OP_OPEN_DOWNGRADE, sp->allow.u.longs) &&
7439 test_bit(OP_DELEGRETURN, sp->allow.u.longs) &&
fa940720
WAA		 7440 test_bit(OP_LOCKU, sp->allow.u.longs)) {
7441 dfprintk(MOUNT, " cleanup mode enabled\n");
7442 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
7443 }
8b5bee2e 7444
99ade3c7
AE		 7445 if (test_bit(OP_LAYOUTRETURN, sp->allow.u.longs)) {
7446 dfprintk(MOUNT, " pnfs cleanup mode enabled\n");
7447 set_bit(NFS_SP4_MACH_CRED_PNFS_CLEANUP,
7448 &clp->cl_sp4_flags);
7449 }
7450
8b5bee2e
WAA		 7451 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
7452 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
7453 dfprintk(MOUNT, " secinfo mode enabled\n");
7454 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
7455 }
3787d506
WAA		 7456
7457 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
7458 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
7459 dfprintk(MOUNT, " stateid mode enabled\n");
7460 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
7461 }
8c21c62c
WAA		 7462
7463 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
7464 dfprintk(MOUNT, " write mode enabled\n");
7465 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
7466 }
7467
7468 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
7469 dfprintk(MOUNT, " commit mode enabled\n");
7470 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
7471 }
2031cd1a
WAA		 7472 }
7473
7474 return 0;
7475}
7476
8d89bd70
AA		 7477struct nfs41_exchange_id_data {
7478 struct nfs41_exchange_id_res res;
7479 struct nfs41_exchange_id_args args;
ad0849a7 7480 struct rpc_xprt *xprt;
8d89bd70
AA		 7481 int rpc_status;
7482};
7483
7484static void nfs4_exchange_id_done(struct rpc_task *task, void *data)
7485{
7486 struct nfs41_exchange_id_data *cdata =
7487 (struct nfs41_exchange_id_data *)data;
7488 struct nfs_client *clp = cdata->args.client;
7489 int status = task->tk_status;
7490
7491 trace_nfs4_exchange_id(clp, status);
7492
7493 if (status == 0)
7494 status = nfs4_check_cl_exchange_flags(cdata->res.flags);
ad0849a7
AA		 7495
7496 if (cdata->xprt && status == 0) {
7497 status = nfs4_detect_session_trunking(clp, &cdata->res,
7498 cdata->xprt);
7499 goto out;
7500 }
7501
8d89bd70
AA		 7502 if (status == 0)
7503 status = nfs4_sp4_select_mode(clp, &cdata->res.state_protect);
7504
7505 if (status == 0) {
7506 clp->cl_clientid = cdata->res.clientid;
7507 clp->cl_exchange_flags = cdata->res.flags;
7508 /* Client ID is not confirmed */
7509 if (!(cdata->res.flags & EXCHGID4_FLAG_CONFIRMED_R)) {
7510 clear_bit(NFS4_SESSION_ESTABLISHED,
7511 &clp->cl_session->session_state);
7512 clp->cl_seqid = cdata->res.seqid;
7513 }
7514
7515 kfree(clp->cl_serverowner);
7516 clp->cl_serverowner = cdata->res.server_owner;
7517 cdata->res.server_owner = NULL;
7518
7519 /* use the most recent implementation id */
7520 kfree(clp->cl_implid);
7521 clp->cl_implid = cdata->res.impl_id;
7522 cdata->res.impl_id = NULL;
7523
7524 if (clp->cl_serverscope != NULL &&
7525 !nfs41_same_server_scope(clp->cl_serverscope,
7526 cdata->res.server_scope)) {
7527 dprintk("%s: server_scope mismatch detected\n",
7528 __func__);
7529 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
7530 kfree(clp->cl_serverscope);
7531 clp->cl_serverscope = NULL;
7532 }
7533
7534 if (clp->cl_serverscope == NULL) {
7535 clp->cl_serverscope = cdata->res.server_scope;
7536 cdata->res.server_scope = NULL;
7537 }
ad0849a7
AA		 7538 /* Save the EXCHANGE_ID verifier session trunk tests */
7539 memcpy(clp->cl_confirm.data, cdata->args.verifier->data,
7540 sizeof(clp->cl_confirm.data));
8d89bd70 7541 }
ad0849a7 7542out:
8d89bd70 7543 cdata->rpc_status = status;
ad0849a7 7544 return;
8d89bd70
AA		 7545}
7546
7547static void nfs4_exchange_id_release(void *data)
7548{
7549 struct nfs41_exchange_id_data *cdata =
7550 (struct nfs41_exchange_id_data *)data;
7551
7552 nfs_put_client(cdata->args.client);
ad0849a7
AA		 7553 if (cdata->xprt) {
7554 xprt_put(cdata->xprt);
7555 rpc_clnt_xprt_switch_put(cdata->args.client->cl_rpcclient);
7556 }
8d89bd70
AA		 7557 kfree(cdata->res.impl_id);
7558 kfree(cdata->res.server_scope);
7559 kfree(cdata->res.server_owner);
7560 kfree(cdata);
7561}
7562
7563static const struct rpc_call_ops nfs4_exchange_id_call_ops = {
7564 .rpc_call_done = nfs4_exchange_id_done,
7565 .rpc_release = nfs4_exchange_id_release,
7566};
7567
2031cd1a
WAA		 7568/*
7569 * _nfs4_proc_exchange_id()
6bbb4ae8 7570 *
2031cd1a 7571 * Wrapper for EXCHANGE_ID operation.
99fe60d0 7572 */
2031cd1a 7573static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
ad0849a7 7574 u32 sp4_how, struct rpc_xprt *xprt)
99fe60d0
BH		 7575{
7576 nfs4_verifier verifier;
99fe60d0
BH		 7577 struct rpc_message msg = {
7578 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
99fe60d0
BH		 7579 .rpc_cred = cred,
7580 };
8d89bd70
AA		 7581 struct rpc_task_setup task_setup_data = {
7582 .rpc_client = clp->cl_rpcclient,
7583 .callback_ops = &nfs4_exchange_id_call_ops,
7584 .rpc_message = &msg,
7585 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
7586 };
7587 struct nfs41_exchange_id_data *calldata;
7588 struct rpc_task *task;
7589 int status = -EIO;
7590
7591 if (!atomic_inc_not_zero(&clp->cl_count))
7592 goto out;
7593
7594 status = -ENOMEM;
7595 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
7596 if (!calldata)
7597 goto out;
99fe60d0 7598
ad0849a7
AA		 7599 if (!xprt)
7600 nfs4_init_boot_verifier(clp, &verifier);
873e3851
JL		 7601
7602 status = nfs4_init_uniform_client_string(clp);
7603 if (status)
8d89bd70 7604 goto out_calldata;
3a6bb738
JL		 7605
7606 dprintk("NFS call exchange_id auth=%s, '%s'\n",
6bbb4ae8 7607 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3a6bb738 7608 clp->cl_owner_id);
99fe60d0 7609
8d89bd70
AA		 7610 calldata->res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
7611 GFP_NOFS);
7612 status = -ENOMEM;
7613 if (unlikely(calldata->res.server_owner == NULL))
7614 goto out_calldata;
78fe0f41 7615
8d89bd70 7616 calldata->res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 7617 GFP_NOFS);
8d89bd70 7618 if (unlikely(calldata->res.server_scope == NULL))
acdeb69d 7619 goto out_server_owner;
78fe0f41 7620
8d89bd70
AA		 7621 calldata->res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
7622 if (unlikely(calldata->res.impl_id == NULL))
7d2ed9ac 7623 goto out_server_scope;
7d2ed9ac 7624
2031cd1a
WAA		 7625 switch (sp4_how) {
7626 case SP4_NONE:
8d89bd70 7627 calldata->args.state_protect.how = SP4_NONE;
2031cd1a
WAA		 7628 break;
7629
7630 case SP4_MACH_CRED:
8d89bd70 7631 calldata->args.state_protect = nfs4_sp4_mach_cred_request;
2031cd1a
WAA		 7632 break;
7633
7634 default:
7635 /* unsupported! */
7636 WARN_ON_ONCE(1);
7637 status = -EINVAL;
6b55970b 7638 goto out_impl_id;
2031cd1a 7639 }
ad0849a7
AA		 7640 if (xprt) {
7641 calldata->xprt = xprt;
7642 task_setup_data.rpc_xprt = xprt;
7643 task_setup_data.flags =
7644 RPC_TASK_SOFT|RPC_TASK_SOFTCONN|RPC_TASK_ASYNC;
7645 calldata->args.verifier = &clp->cl_confirm;
7646 } else {
7647 calldata->args.verifier = &verifier;
7648 }
8d89bd70
AA		 7649 calldata->args.client = clp;
7650#ifdef CONFIG_NFS_V4_1_MIGRATION
7651 calldata->args.flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
7652 EXCHGID4_FLAG_BIND_PRINC_STATEID |
7653 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
7654#else
7655 calldata->args.flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
7656 EXCHGID4_FLAG_BIND_PRINC_STATEID,
7657#endif
7658 msg.rpc_argp = &calldata->args;
7659 msg.rpc_resp = &calldata->res;
7660 task_setup_data.callback_data = calldata;
2031cd1a 7661
8d89bd70
AA		 7662 task = rpc_run_task(&task_setup_data);
7663 if (IS_ERR(task)) {
7664 status = PTR_ERR(task);
7665 goto out_impl_id;
6b55970b 7666 }
7d2ed9ac 7667
ad0849a7
AA		 7668 if (!xprt) {
7669 status = rpc_wait_for_completion_task(task);
7670 if (!status)
7671 status = calldata->rpc_status;
7672 } else /* session trunking test */
8d89bd70 7673 status = calldata->rpc_status;
ad0849a7 7674
8d89bd70 7675 rpc_put_task(task);
abe9a6d5 7676out:
177313f1 7677 if (clp->cl_implid != NULL)
6bbb4ae8 7678 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 7679 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 7680 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 7681 clp->cl_implid->date.seconds,
7682 clp->cl_implid->date.nseconds);
6bbb4ae8 7683 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0 7684 return status;
8d89bd70
AA		 7685
7686out_impl_id:
7687 kfree(calldata->res.impl_id);
7688out_server_scope:
7689 kfree(calldata->res.server_scope);
7690out_server_owner:
7691 kfree(calldata->res.server_owner);
7692out_calldata:
7693 kfree(calldata);
7694 goto out;
99fe60d0
BH		 7695}
7696
2031cd1a
WAA		 7697/*
7698 * nfs4_proc_exchange_id()
7699 *
7700 * Returns zero, a negative errno, or a negative NFS4ERR status code.
7701 *
7702 * Since the clientid has expired, all compounds using sessions
7703 * associated with the stale clientid will be returning
7704 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
7705 * be in some phase of session reset.
7706 *
7707 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
7708 */
7709int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
7710{
7711 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
7712 int status;
7713
7714 /* try SP4_MACH_CRED if krb5i/p */
7715 if (authflavor == RPC_AUTH_GSS_KRB5I ||
7716 authflavor == RPC_AUTH_GSS_KRB5P) {
ad0849a7 7717 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED, NULL);
2031cd1a
WAA		 7718 if (!status)
7719 return 0;
7720 }
7721
7722 /* try SP4_NONE */
ad0849a7 7723 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE, NULL);
2031cd1a
WAA		 7724}
7725
04fa2c6b
AA		 7726/**
7727 * nfs4_test_session_trunk
7728 *
7729 * This is an add_xprt_test() test function called from
7730 * rpc_clnt_setup_test_and_add_xprt.
7731 *
7732 * The rpc_xprt_switch is referrenced by rpc_clnt_setup_test_and_add_xprt
7733 * and is dereferrenced in nfs4_exchange_id_release
7734 *
7735 * Upon success, add the new transport to the rpc_clnt
7736 *
7737 * @clnt: struct rpc_clnt to get new transport
7738 * @xprt: the rpc_xprt to test
7739 * @data: call data for _nfs4_proc_exchange_id.
7740 */
7741int nfs4_test_session_trunk(struct rpc_clnt *clnt, struct rpc_xprt *xprt,
7742 void *data)
7743{
7744 struct nfs4_add_xprt_data *adata = (struct nfs4_add_xprt_data *)data;
7745 u32 sp4_how;
7746
7747 dprintk("--> %s try %s\n", __func__,
7748 xprt->address_strings[RPC_DISPLAY_ADDR]);
7749
7750 sp4_how = (adata->clp->cl_sp4_flags == 0 ? SP4_NONE : SP4_MACH_CRED);
7751
7752 /* Test connection for session trunking. Async exchange_id call */
7753 return _nfs4_proc_exchange_id(adata->clp, adata->cred, sp4_how, xprt);
2031cd1a 7754}
04fa2c6b 7755EXPORT_SYMBOL_GPL(nfs4_test_session_trunk);
2031cd1a 7756
66245539
TM		 7757static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
7758 struct rpc_cred *cred)
7759{
7760 struct rpc_message msg = {
7761 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
7762 .rpc_argp = clp,
7763 .rpc_cred = cred,
7764 };
7765 int status;
7766
7767 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7768 trace_nfs4_destroy_clientid(clp, status);
66245539 7769 if (status)
02c67525 7770 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 7771 "DESTROY_CLIENTID.", status, clp->cl_hostname);
7772 return status;
7773}
7774
7775static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
7776 struct rpc_cred *cred)
7777{
7778 unsigned int loop;
7779 int ret;
7780
7781 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
7782 ret = _nfs4_proc_destroy_clientid(clp, cred);
7783 switch (ret) {
7784 case -NFS4ERR_DELAY:
7785 case -NFS4ERR_CLIENTID_BUSY:
7786 ssleep(1);
7787 break;
7788 default:
7789 return ret;
7790 }
7791 }
7792 return 0;
7793}
7794
7795int nfs4_destroy_clientid(struct nfs_client *clp)
7796{
7797 struct rpc_cred *cred;
7798 int ret = 0;
7799
7800 if (clp->cl_mvops->minor_version < 1)
7801 goto out;
7802 if (clp->cl_exchange_flags == 0)
7803 goto out;
05f4c350
CL		 7804 if (clp->cl_preserve_clid)
7805 goto out;
73d8bde5 7806 cred = nfs4_get_clid_cred(clp);
66245539
TM		 7807 ret = nfs4_proc_destroy_clientid(clp, cred);
7808 if (cred)
7809 put_rpccred(cred);
7810 switch (ret) {
7811 case 0:
7812 case -NFS4ERR_STALE_CLIENTID:
7813 clp->cl_exchange_flags = 0;
7814 }
7815out:
7816 return ret;
7817}
7818
2050f0cc
AA		 7819struct nfs4_get_lease_time_data {
7820 struct nfs4_get_lease_time_args *args;
7821 struct nfs4_get_lease_time_res *res;
7822 struct nfs_client *clp;
7823};
7824
7825static void nfs4_get_lease_time_prepare(struct rpc_task *task,
7826 void *calldata)
7827{
2050f0cc
AA		 7828 struct nfs4_get_lease_time_data *data =
7829 (struct nfs4_get_lease_time_data *)calldata;
7830
7831 dprintk("--> %s\n", __func__);
7832 /* just setup sequence, do not trigger session recovery
7833 since we're invoked within one */
d9afbd1b
TM		 7834 nfs41_setup_sequence(data->clp->cl_session,
7835 &data->args->la_seq_args,
7836 &data->res->lr_seq_res,
7837 task);
2050f0cc
AA		 7838 dprintk("<-- %s\n", __func__);
7839}
7840
7841/*
7842 * Called from nfs4_state_manager thread for session setup, so don't recover
7843 * from sequence operation or clientid errors.
7844 */
7845static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
7846{
7847 struct nfs4_get_lease_time_data *data =
7848 (struct nfs4_get_lease_time_data *)calldata;
7849
7850 dprintk("--> %s\n", __func__);
14516c3a
TM		 7851 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
7852 return;
2050f0cc
AA		 7853 switch (task->tk_status) {
7854 case -NFS4ERR_DELAY:
7855 case -NFS4ERR_GRACE:
7856 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
7857 rpc_delay(task, NFS4_POLL_RETRY_MIN);
7858 task->tk_status = 0;
a8a4ae3a
AA		 7859 /* fall through */
7860 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 7861 rpc_restart_call_prepare(task);
2050f0cc
AA		 7862 return;
7863 }
2050f0cc
AA		 7864 dprintk("<-- %s\n", __func__);
7865}
7866
17280175 7867static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 7868 .rpc_call_prepare = nfs4_get_lease_time_prepare,
7869 .rpc_call_done = nfs4_get_lease_time_done,
7870};
7871
7872int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
7873{
7874 struct rpc_task *task;
7875 struct nfs4_get_lease_time_args args;
7876 struct nfs4_get_lease_time_res res = {
7877 .lr_fsinfo = fsinfo,
7878 };
7879 struct nfs4_get_lease_time_data data = {
7880 .args = &args,
7881 .res = &res,
7882 .clp = clp,
7883 };
7884 struct rpc_message msg = {
7885 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
7886 .rpc_argp = &args,
7887 .rpc_resp = &res,
7888 };
7889 struct rpc_task_setup task_setup = {
7890 .rpc_client = clp->cl_rpcclient,
7891 .rpc_message = &msg,
7892 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 7893 .callback_data = &data,
7894 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 7895 };
7896 int status;
7897
a9c92d6b 7898 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 7899 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 7900 dprintk("--> %s\n", __func__);
7901 task = rpc_run_task(&task_setup);
7902
7903 if (IS_ERR(task))
7904 status = PTR_ERR(task);
7905 else {
7906 status = task->tk_status;
7907 rpc_put_task(task);
7908 }
7909 dprintk("<-- %s return %d\n", __func__, status);
7910
7911 return status;
7912}
7913
fc931582
AA		 7914/*
7915 * Initialize the values to be used by the client in CREATE_SESSION
7916 * If nfs4_init_session set the fore channel request and response sizes,
7917 * use them.
7918 *
7919 * Set the back channel max_resp_sz_cached to zero to force the client to
7920 * always set csa_cachethis to FALSE because the current implementation
7921 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
7922 */
6b26cc8c
CL		 7923static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args,
7924 struct rpc_clnt *clnt)
fc931582 7925{
18aad3d5 7926 unsigned int max_rqst_sz, max_resp_sz;
6b26cc8c 7927 unsigned int max_bc_payload = rpc_max_bc_payload(clnt);
18aad3d5
AA		 7928
7929 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
7930 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 7931
fc931582 7932 /* Fore channel attributes */
18aad3d5
AA		 7933 args->fc_attrs.max_rqst_sz = max_rqst_sz;
7934 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 7935 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 7936 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 7937
7938 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 7939 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 7940 __func__,
7941 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 7942 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 7943
7944 /* Back channel attributes */
6b26cc8c
CL		 7945 args->bc_attrs.max_rqst_sz = max_bc_payload;
7946 args->bc_attrs.max_resp_sz = max_bc_payload;
fc931582
AA		 7947 args->bc_attrs.max_resp_sz_cached = 0;
7948 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5405fc44 7949 args->bc_attrs.max_reqs = min_t(unsigned short, max_session_cb_slots, 1);
fc931582
AA		 7950
7951 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
7952 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
7953 __func__,
7954 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
7955 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
7956 args->bc_attrs.max_reqs);
7957}
7958
79969dd1
TM		 7959static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args,
7960 struct nfs41_create_session_res *res)
8d35301d 7961{
43c2e885 7962 struct nfs4_channel_attrs *sent = &args->fc_attrs;
79969dd1 7963 struct nfs4_channel_attrs *rcvd = &res->fc_attrs;
43c2e885 7964
43c2e885
BF		 7965 if (rcvd->max_resp_sz > sent->max_resp_sz)
7966 return -EINVAL;
7967 /*
7968 * Our requested max_ops is the minimum we need; we're not
7969 * prepared to break up compounds into smaller pieces than that.
7970 * So, no point even trying to continue if the server won't
7971 * cooperate:
7972 */
7973 if (rcvd->max_ops < sent->max_ops)
7974 return -EINVAL;
7975 if (rcvd->max_reqs == 0)
7976 return -EINVAL;
b4b9a0c1
VG		 7977 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
7978 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 7979 return 0;
8d35301d
AA		 7980}
7981
79969dd1
TM		 7982static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args,
7983 struct nfs41_create_session_res *res)
43c2e885
BF		 7984{
7985 struct nfs4_channel_attrs *sent = &args->bc_attrs;
79969dd1 7986 struct nfs4_channel_attrs *rcvd = &res->bc_attrs;
8d35301d 7987
b1c0df5f
TM		 7988 if (!(res->flags & SESSION4_BACK_CHAN))
7989 goto out;
43c2e885
BF		 7990 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
7991 return -EINVAL;
7992 if (rcvd->max_resp_sz < sent->max_resp_sz)
7993 return -EINVAL;
7994 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7995 return -EINVAL;
5405fc44 7996 if (rcvd->max_ops > sent->max_ops)
43c2e885 7997 return -EINVAL;
5405fc44 7998 if (rcvd->max_reqs > sent->max_reqs)
43c2e885 7999 return -EINVAL;
b1c0df5f 8000out:
43c2e885
BF		 8001 return 0;
8002}
8d35301d 8003
8d35301d 8004static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
79969dd1 8005 struct nfs41_create_session_res *res)
8d35301d 8006{
43c2e885 8007 int ret;
8d35301d 8008
79969dd1 8009 ret = nfs4_verify_fore_channel_attrs(args, res);
43c2e885
BF		 8010 if (ret)
8011 return ret;
79969dd1
TM		 8012 return nfs4_verify_back_channel_attrs(args, res);
8013}
8014
8015static void nfs4_update_session(struct nfs4_session *session,
8016 struct nfs41_create_session_res *res)
8017{
8018 nfs4_copy_sessionid(&session->sess_id, &res->sessionid);
e11259f9
TM		 8019 /* Mark client id and session as being confirmed */
8020 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;
8021 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state);
79969dd1
TM		 8022 session->flags = res->flags;
8023 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs));
b1c0df5f
TM		 8024 if (res->flags & SESSION4_BACK_CHAN)
8025 memcpy(&session->bc_attrs, &res->bc_attrs,
8026 sizeof(session->bc_attrs));
8d35301d
AA		 8027}
8028
848f5bda
TM		 8029static int _nfs4_proc_create_session(struct nfs_client *clp,
8030 struct rpc_cred *cred)
fc931582
AA		 8031{
8032 struct nfs4_session *session = clp->cl_session;
8033 struct nfs41_create_session_args args = {
8034 .client = clp,
79969dd1
TM		 8035 .clientid = clp->cl_clientid,
8036 .seqid = clp->cl_seqid,
fc931582
AA		 8037 .cb_program = NFS4_CALLBACK,
8038 };
79969dd1
TM		 8039 struct nfs41_create_session_res res;
8040
fc931582
AA		 8041 struct rpc_message msg = {
8042 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
8043 .rpc_argp = &args,
8044 .rpc_resp = &res,
848f5bda 8045 .rpc_cred = cred,
fc931582
AA		 8046 };
8047 int status;
8048
6b26cc8c 8049 nfs4_init_channel_attrs(&args, clp->cl_rpcclient);
0f91421e 8050 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 8051
1bd714f2 8052 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 8053 trace_nfs4_create_session(clp, status);
fc931582 8054
b519d408
TM		 8055 switch (status) {
8056 case -NFS4ERR_STALE_CLIENTID:
8057 case -NFS4ERR_DELAY:
8058 case -ETIMEDOUT:
8059 case -EACCES:
8060 case -EAGAIN:
8061 goto out;
8062 };
8063
8064 clp->cl_seqid++;
43095d39 8065 if (!status) {
8d35301d 8066 /* Verify the session's negotiated channel_attrs values */
79969dd1 8067 status = nfs4_verify_channel_attrs(&args, &res);
fc931582 8068 /* Increment the clientid slot sequence id */
79969dd1
TM		 8069 if (status)
8070 goto out;
8071 nfs4_update_session(session, &res);
fc931582 8072 }
79969dd1 8073out:
fc931582
AA		 8074 return status;
8075}
8076
8077/*
8078 * Issues a CREATE_SESSION operation to the server.
8079 * It is the responsibility of the caller to verify the session is
8080 * expired before calling this routine.
8081 */
848f5bda 8082int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 8083{
8084 int status;
8085 unsigned *ptr;
fc931582
AA		 8086 struct nfs4_session *session = clp->cl_session;
8087
8088 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
8089
848f5bda 8090 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 8091 if (status)
8092 goto out;
8093
aacd5537
AA		 8094 /* Init or reset the session slot tables */
8095 status = nfs4_setup_session_slot_tables(session);
8096 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 8097 if (status)
8098 goto out;
8099
8100 ptr = (unsigned *)&session->sess_id.data[0];
8101 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
8102 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 8103out:
8104 dprintk("<-- %s\n", __func__);
8105 return status;
8106}
8107
0f3e66c6
AA		 8108/*
8109 * Issue the over-the-wire RPC DESTROY_SESSION.
8110 * The caller must serialize access to this routine.
8111 */
848f5bda
TM		 8112int nfs4_proc_destroy_session(struct nfs4_session *session,
8113 struct rpc_cred *cred)
0f3e66c6 8114{
848f5bda
TM		 8115 struct rpc_message msg = {
8116 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
8117 .rpc_argp = session,
8118 .rpc_cred = cred,
8119 };
0f3e66c6 8120 int status = 0;
0f3e66c6
AA		 8121
8122 dprintk("--> nfs4_proc_destroy_session\n");
8123
8124 /* session is still being setup */
e11259f9
TM		 8125 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state))
8126 return 0;
0f3e66c6 8127
1bd714f2 8128 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 8129 trace_nfs4_destroy_session(session->clp, status);
0f3e66c6
AA		 8130
8131 if (status)
08106ac7 8132 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 8133 "Session has been destroyed regardless...\n", status);
8134
8135 dprintk("<-- nfs4_proc_destroy_session\n");
8136 return status;
8137}
8138
fc01cea9
AA		 8139/*
8140 * Renew the cl_session lease.
8141 */
d5f8d3fe
TM		 8142struct nfs4_sequence_data {
8143 struct nfs_client *clp;
8144 struct nfs4_sequence_args args;
8145 struct nfs4_sequence_res res;
8146};
8147
dc96aef9
AB		 8148static void nfs41_sequence_release(void *data)
8149{
d5f8d3fe
TM		 8150 struct nfs4_sequence_data *calldata = data;
8151 struct nfs_client *clp = calldata->clp;
dc96aef9 8152
7135840f
AB		 8153 if (atomic_read(&clp->cl_count) > 1)
8154 nfs4_schedule_state_renewal(clp);
8155 nfs_put_client(clp);
d5f8d3fe 8156 kfree(calldata);
dc96aef9
AB		 8157}
8158
aa5190d0
TM		 8159static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
8160{
8161 switch(task->tk_status) {
8162 case -NFS4ERR_DELAY:
aa5190d0
TM		 8163 rpc_delay(task, NFS4_POLL_RETRY_MAX);
8164 return -EAGAIN;
8165 default:
0400a6b0 8166 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 8167 }
8168 return 0;
8169}
8170
dc96aef9 8171static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 8172{
d5f8d3fe
TM		 8173 struct nfs4_sequence_data *calldata = data;
8174 struct nfs_client *clp = calldata->clp;
fc01cea9 8175
14516c3a
TM		 8176 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
8177 return;
fc01cea9 8178
c6d01c6f 8179 trace_nfs4_sequence(clp, task->tk_status);
fc01cea9
AA		 8180 if (task->tk_status < 0) {
8181 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 8182 if (atomic_read(&clp->cl_count) == 1)
8183 goto out;
fc01cea9 8184
aa5190d0
TM		 8185 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
8186 rpc_restart_call_prepare(task);
fc01cea9
AA		 8187 return;
8188 }
8189 }
fc01cea9 8190 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 8191out:
fc01cea9
AA		 8192 dprintk("<-- %s\n", __func__);
8193}
8194
8195static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
8196{
d5f8d3fe
TM		 8197 struct nfs4_sequence_data *calldata = data;
8198 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 8199 struct nfs4_sequence_args *args;
8200 struct nfs4_sequence_res *res;
8201
fc01cea9
AA		 8202 args = task->tk_msg.rpc_argp;
8203 res = task->tk_msg.rpc_resp;
8204
d9afbd1b 8205 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 8206}
8207
8208static const struct rpc_call_ops nfs41_sequence_ops = {
8209 .rpc_call_done = nfs41_sequence_call_done,
8210 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 8211 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 8212};
8213
8fe72bac
TM		 8214static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
8215 struct rpc_cred *cred,
8216 bool is_privileged)
fc01cea9 8217{
d5f8d3fe 8218 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 8219 struct rpc_message msg = {
8220 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
8221 .rpc_cred = cred,
8222 };
71ac6da9
TM		 8223 struct rpc_task_setup task_setup_data = {
8224 .rpc_client = clp->cl_rpcclient,
8225 .rpc_message = &msg,
8fe72bac 8226 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 8227 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 8228 };
fc01cea9 8229
7135840f 8230 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 8231 return ERR_PTR(-EIO);
dfb4f309 8232 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 8233 if (calldata == NULL) {
7135840f 8234 nfs_put_client(clp);
71ac6da9 8235 return ERR_PTR(-ENOMEM);
fc01cea9 8236 }
a9c92d6b 8237 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 8238 if (is_privileged)
8239 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 8240 msg.rpc_argp = &calldata->args;
8241 msg.rpc_resp = &calldata->res;
8242 calldata->clp = clp;
71ac6da9 8243 task_setup_data.callback_data = calldata;
fc01cea9 8244
71ac6da9
TM		 8245 return rpc_run_task(&task_setup_data);
8246}
8247
2f60ea6b 8248static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 8249{
8250 struct rpc_task *task;
8251 int ret = 0;
8252
2f60ea6b 8253 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
d1f456b0 8254 return -EAGAIN;
8fe72bac 8255 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 8256 if (IS_ERR(task))
8257 ret = PTR_ERR(task);
8258 else
bf294b41 8259 rpc_put_task_async(task);
71ac6da9
TM		 8260 dprintk("<-- %s status=%d\n", __func__, ret);
8261 return ret;
8262}
8263
8264static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
8265{
8266 struct rpc_task *task;
8267 int ret;
8268
8fe72bac 8269 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 8270 if (IS_ERR(task)) {
8271 ret = PTR_ERR(task);
8272 goto out;
8273 }
8274 ret = rpc_wait_for_completion_task(task);
be824167 8275 if (!ret)
71ac6da9
TM		 8276 ret = task->tk_status;
8277 rpc_put_task(task);
8278out:
8279 dprintk("<-- %s status=%d\n", __func__, ret);
8280 return ret;
fc01cea9
AA		 8281}
8282
fce5c838
RL		 8283struct nfs4_reclaim_complete_data {
8284 struct nfs_client *clp;
8285 struct nfs41_reclaim_complete_args arg;
8286 struct nfs41_reclaim_complete_res res;
8287};
8288
8289static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
8290{
8291 struct nfs4_reclaim_complete_data *calldata = data;
8292
d9afbd1b
TM		 8293 nfs41_setup_sequence(calldata->clp->cl_session,
8294 &calldata->arg.seq_args,
8295 &calldata->res.seq_res,
8296 task);
fce5c838
RL		 8297}
8298
aa5190d0
TM		 8299static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
8300{
8301 switch(task->tk_status) {
8302 case 0:
8303 case -NFS4ERR_COMPLETE_ALREADY:
8304 case -NFS4ERR_WRONG_CRED: /* What to do here? */
8305 break;
8306 case -NFS4ERR_DELAY:
aa5190d0 8307 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 8308 /* fall through */
8309 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 8310 return -EAGAIN;
8311 default:
0400a6b0 8312 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 8313 }
8314 return 0;
8315}
8316
fce5c838
RL		 8317static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
8318{
8319 struct nfs4_reclaim_complete_data *calldata = data;
8320 struct nfs_client *clp = calldata->clp;
8321 struct nfs4_sequence_res *res = &calldata->res.seq_res;
8322
8323 dprintk("--> %s\n", __func__);
14516c3a
TM		 8324 if (!nfs41_sequence_done(task, res))
8325 return;
fce5c838 8326
c6d01c6f 8327 trace_nfs4_reclaim_complete(clp, task->tk_status);
aa5190d0
TM		 8328 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
8329 rpc_restart_call_prepare(task);
8330 return;
8331 }
fce5c838
RL		 8332 dprintk("<-- %s\n", __func__);
8333}
8334
8335static void nfs4_free_reclaim_complete_data(void *data)
8336{
8337 struct nfs4_reclaim_complete_data *calldata = data;
8338
8339 kfree(calldata);
8340}
8341
8342static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
8343 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
8344 .rpc_call_done = nfs4_reclaim_complete_done,
8345 .rpc_release = nfs4_free_reclaim_complete_data,
8346};
8347
8348/*
8349 * Issue a global reclaim complete.
8350 */
965e9c23
TM		 8351static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
8352 struct rpc_cred *cred)
fce5c838
RL		 8353{
8354 struct nfs4_reclaim_complete_data *calldata;
8355 struct rpc_task *task;
8356 struct rpc_message msg = {
8357 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 8358 .rpc_cred = cred,
fce5c838
RL		 8359 };
8360 struct rpc_task_setup task_setup_data = {
8361 .rpc_client = clp->cl_rpcclient,
8362 .rpc_message = &msg,
8363 .callback_ops = &nfs4_reclaim_complete_call_ops,
8364 .flags = RPC_TASK_ASYNC,
8365 };
8366 int status = -ENOMEM;
8367
8368 dprintk("--> %s\n", __func__);
8535b2be 8369 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 8370 if (calldata == NULL)
8371 goto out;
8372 calldata->clp = clp;
8373 calldata->arg.one_fs = 0;
fce5c838 8374
a9c92d6b 8375 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 8376 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 8377 msg.rpc_argp = &calldata->arg;
8378 msg.rpc_resp = &calldata->res;
8379 task_setup_data.callback_data = calldata;
8380 task = rpc_run_task(&task_setup_data);
acf82b85 8381 if (IS_ERR(task)) {
fce5c838 8382 status = PTR_ERR(task);
acf82b85
DC		 8383 goto out;
8384 }
c34c32ea
AA		 8385 status = nfs4_wait_for_completion_rpc_task(task);
8386 if (status == 0)
8387 status = task->tk_status;
fce5c838 8388 rpc_put_task(task);
acf82b85 8389 return 0;
fce5c838
RL		 8390out:
8391 dprintk("<-- %s status=%d\n", __func__, status);
8392 return status;
8393}
b1f69b75
AA		 8394
8395static void
8396nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
8397{
8398 struct nfs4_layoutget *lgp = calldata;
c31663d4 8399 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 8400 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 8401
8402 dprintk("--> %s\n", __func__);
183d9e7b
JL		 8403 nfs41_setup_sequence(session, &lgp->args.seq_args,
8404 &lgp->res.seq_res, task);
8405 dprintk("<-- %s\n", __func__);
b1f69b75
AA		 8406}
8407
8408static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
8409{
8410 struct nfs4_layoutget *lgp = calldata;
183d9e7b
JL		 8411
8412 dprintk("--> %s\n", __func__);
2e80dbe7 8413 nfs41_sequence_process(task, &lgp->res.seq_res);
183d9e7b
JL		 8414 dprintk("<-- %s\n", __func__);
8415}
8416
8417static int
8418nfs4_layoutget_handle_exception(struct rpc_task *task,
8419 struct nfs4_layoutget *lgp, struct nfs4_exception *exception)
8420{
ee314c2a
TM		 8421 struct inode *inode = lgp->args.inode;
8422 struct nfs_server *server = NFS_SERVER(inode);
8423 struct pnfs_layout_hdr *lo;
e85d7ee4
TM		 8424 int nfs4err = task->tk_status;
8425 int err, status = 0;
f7db0b28 8426 LIST_HEAD(head);
b1f69b75 8427
ed7e5423 8428 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
b1f69b75 8429
e85d7ee4 8430 switch (nfs4err) {
b1f69b75 8431 case 0:
ee314c2a 8432 goto out;
7c1e6e58
PT		 8433
8434 /*
8435 * NFS4ERR_LAYOUTUNAVAILABLE means we are not supposed to use pnfs
8436 * on the file. set tk_status to -ENODATA to tell upper layer to
8437 * retry go inband.
8438 */
8439 case -NFS4ERR_LAYOUTUNAVAILABLE:
183d9e7b 8440 status = -ENODATA;
7c1e6e58 8441 goto out;
21b874c8
TM		 8442 /*
8443 * NFS4ERR_BADLAYOUT means the MDS cannot return a layout of
8444 * length lgp->args.minlength != 0 (see RFC5661 section 18.43.3).
8445 */
8446 case -NFS4ERR_BADLAYOUT:
183d9e7b
JL		 8447 status = -EOVERFLOW;
8448 goto out;
ed7e5423
BH		 8449 /*
8450 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
21b874c8
TM		 8451 * (or clients) writing to the same RAID stripe except when
8452 * the minlength argument is 0 (see RFC5661 section 18.43.3).
183d9e7b
JL		 8453 *
8454 * Treat it like we would RECALLCONFLICT -- we retry for a little
8455 * while, and then eventually give up.
ed7e5423 8456 */
b1f69b75 8457 case -NFS4ERR_LAYOUTTRYLATER:
183d9e7b
JL		 8458 if (lgp->args.minlength == 0) {
8459 status = -EOVERFLOW;
8460 goto out;
ed7e5423 8461 }
e85d7ee4
TM		 8462 status = -EBUSY;
8463 break;
183d9e7b 8464 case -NFS4ERR_RECALLCONFLICT:
183d9e7b 8465 status = -ERECALLCONFLICT;
e85d7ee4 8466 break;
26f47443
TM		 8467 case -NFS4ERR_DELEG_REVOKED:
8468 case -NFS4ERR_ADMIN_REVOKED:
ee314c2a
TM		 8469 case -NFS4ERR_EXPIRED:
8470 case -NFS4ERR_BAD_STATEID:
183d9e7b 8471 exception->timeout = 0;
ee314c2a 8472 spin_lock(&inode->i_lock);
f7db0b28
TM		 8473 lo = NFS_I(inode)->layout;
8474 /* If the open stateid was bad, then recover it. */
8475 if (!lo || test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) ||
8476 nfs4_stateid_match_other(&lgp->args.stateid,
2259f960 8477 &lgp->args.ctx->state->stateid)) {
ee314c2a 8478 spin_unlock(&inode->i_lock);
183d9e7b 8479 exception->state = lgp->args.ctx->state;
26f47443 8480 exception->stateid = &lgp->args.stateid;
2259f960
TM		 8481 break;
8482 }
f7db0b28
TM		 8483
8484 /*
8485 * Mark the bad layout state as invalid, then retry
8486 */
668f455d 8487 pnfs_mark_layout_stateid_invalid(lo, &head);
f7db0b28
TM		 8488 spin_unlock(&inode->i_lock);
8489 pnfs_free_lseg_list(&head);
8490 status = -EAGAIN;
8491 goto out;
b1f69b75 8492 }
183d9e7b 8493
8ac09251 8494 nfs4_sequence_free_slot(&lgp->res.seq_res);
e85d7ee4
TM		 8495 err = nfs4_handle_exception(server, nfs4err, exception);
8496 if (!status) {
8497 if (exception->retry)
8498 status = -EAGAIN;
8499 else
8500 status = err;
8501 }
ee314c2a 8502out:
b1f69b75 8503 dprintk("<-- %s\n", __func__);
183d9e7b 8504 return status;
b1f69b75
AA		 8505}
8506
8554116e
IK		 8507static size_t max_response_pages(struct nfs_server *server)
8508{
8509 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
8510 return nfs_page_array_len(0, max_resp_sz);
8511}
8512
8513static void nfs4_free_pages(struct page **pages, size_t size)
8514{
8515 int i;
8516
8517 if (!pages)
8518 return;
8519
8520 for (i = 0; i < size; i++) {
8521 if (!pages[i])
8522 break;
8523 __free_page(pages[i]);
8524 }
8525 kfree(pages);
8526}
8527
8528static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
8529{
8530 struct page **pages;
8531 int i;
8532
8533 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
8534 if (!pages) {
8535 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
8536 return NULL;
8537 }
8538
8539 for (i = 0; i < size; i++) {
8540 pages[i] = alloc_page(gfp_flags);
8541 if (!pages[i]) {
8542 dprintk("%s: failed to allocate page\n", __func__);
8543 nfs4_free_pages(pages, size);
8544 return NULL;
8545 }
8546 }
8547
8548 return pages;
8549}
8550
b1f69b75
AA		 8551static void nfs4_layoutget_release(void *calldata)
8552{
8553 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 8554 struct inode *inode = lgp->args.inode;
8555 struct nfs_server *server = NFS_SERVER(inode);
8554116e 8556 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 8557
8558 dprintk("--> %s\n", __func__);
8554116e 8559 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 8560 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 8561 put_nfs_open_context(lgp->args.ctx);
8562 kfree(calldata);
8563 dprintk("<-- %s\n", __func__);
8564}
8565
8566static const struct rpc_call_ops nfs4_layoutget_call_ops = {
8567 .rpc_call_prepare = nfs4_layoutget_prepare,
8568 .rpc_call_done = nfs4_layoutget_done,
8569 .rpc_release = nfs4_layoutget_release,
8570};
8571
a0b0a6e3 8572struct pnfs_layout_segment *
183d9e7b 8573nfs4_proc_layoutget(struct nfs4_layoutget *lgp, long *timeout, gfp_t gfp_flags)
b1f69b75 8574{
a47970ff
WAA		 8575 struct inode *inode = lgp->args.inode;
8576 struct nfs_server *server = NFS_SERVER(inode);
8554116e 8577 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 8578 struct rpc_task *task;
8579 struct rpc_message msg = {
8580 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
8581 .rpc_argp = &lgp->args,
8582 .rpc_resp = &lgp->res,
6ab59344 8583 .rpc_cred = lgp->cred,
b1f69b75
AA		 8584 };
8585 struct rpc_task_setup task_setup_data = {
8586 .rpc_client = server->client,
8587 .rpc_message = &msg,
8588 .callback_ops = &nfs4_layoutget_call_ops,
8589 .callback_data = lgp,
8590 .flags = RPC_TASK_ASYNC,
8591 };
a0b0a6e3 8592 struct pnfs_layout_segment *lseg = NULL;
bc23676c
TM		 8593 struct nfs4_exception exception = {
8594 .inode = inode,
8595 .timeout = *timeout,
8596 };
b1f69b75
AA		 8597 int status = 0;
8598
8599 dprintk("--> %s\n", __func__);
8600
4bd5a980
PT		 8601 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
8602 pnfs_get_layout_hdr(NFS_I(inode)->layout);
8603
8554116e
IK		 8604 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
8605 if (!lgp->args.layout.pages) {
8606 nfs4_layoutget_release(lgp);
a0b0a6e3 8607 return ERR_PTR(-ENOMEM);
8554116e
IK		 8608 }
8609 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
8610
35124a09 8611 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 8612 lgp->res.seq_res.sr_slot = NULL;
a9c92d6b 8613 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff 8614
b1f69b75
AA		 8615 task = rpc_run_task(&task_setup_data);
8616 if (IS_ERR(task))
a0b0a6e3 8617 return ERR_CAST(task);
b1f69b75 8618 status = nfs4_wait_for_completion_rpc_task(task);
183d9e7b
JL		 8619 if (status == 0) {
8620 status = nfs4_layoutget_handle_exception(task, lgp, &exception);
8621 *timeout = exception.timeout;
8622 }
8623
1037e6ea
TM		 8624 trace_nfs4_layoutget(lgp->args.ctx,
8625 &lgp->args.range,
8626 &lgp->res.range,
48c9579a 8627 &lgp->res.stateid,
1037e6ea 8628 status);
183d9e7b 8629
085b7a45
WAA		 8630 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
8631 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 8632 lseg = pnfs_layout_process(lgp);
2e80dbe7 8633 nfs4_sequence_free_slot(&lgp->res.seq_res);
b1f69b75
AA		 8634 rpc_put_task(task);
8635 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 8636 if (status)
8637 return ERR_PTR(status);
8638 return lseg;
b1f69b75
AA		 8639}
8640
cbe82603
BH		 8641static void
8642nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
8643{
8644 struct nfs4_layoutreturn *lrp = calldata;
8645
8646 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 8647 nfs41_setup_sequence(lrp->clp->cl_session,
8648 &lrp->args.seq_args,
8649 &lrp->res.seq_res,
8650 task);
cbe82603
BH		 8651}
8652
8653static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
8654{
8655 struct nfs4_layoutreturn *lrp = calldata;
8656 struct nfs_server *server;
8657
8658 dprintk("--> %s\n", __func__);
8659
2e80dbe7 8660 if (!nfs41_sequence_process(task, &lrp->res.seq_res))
cbe82603
BH		 8661 return;
8662
8663 server = NFS_SERVER(lrp->args.inode);
f22e5edd
TM		 8664 switch (task->tk_status) {
8665 default:
8666 task->tk_status = 0;
8667 case 0:
8668 break;
8669 case -NFS4ERR_DELAY:
8478eaa1 8670 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
f22e5edd 8671 break;
2e80dbe7 8672 nfs4_sequence_free_slot(&lrp->res.seq_res);
d00c5d43 8673 rpc_restart_call_prepare(task);
cbe82603
BH		 8674 return;
8675 }
cbe82603
BH		 8676 dprintk("<-- %s\n", __func__);
8677}
8678
8679static void nfs4_layoutreturn_release(void *calldata)
8680{
8681 struct nfs4_layoutreturn *lrp = calldata;
849b286f 8682 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 8683
8684 dprintk("--> %s\n", __func__);
2a974425 8685 pnfs_layoutreturn_free_lsegs(lo, &lrp->args.stateid, &lrp->args.range,
68f74479 8686 lrp->res.lrs_present ? &lrp->res.stateid : NULL);
2e80dbe7 8687 nfs4_sequence_free_slot(&lrp->res.seq_res);
4d796d75
TM		 8688 if (lrp->ld_private.ops && lrp->ld_private.ops->free)
8689 lrp->ld_private.ops->free(&lrp->ld_private);
2f065ddb
TM		 8690 pnfs_put_layout_hdr(lrp->args.layout);
8691 nfs_iput_and_deactive(lrp->inode);
cbe82603
BH		 8692 kfree(calldata);
8693 dprintk("<-- %s\n", __func__);
8694}
8695
8696static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
8697 .rpc_call_prepare = nfs4_layoutreturn_prepare,
8698 .rpc_call_done = nfs4_layoutreturn_done,
8699 .rpc_release = nfs4_layoutreturn_release,
8700};
8701
6c16605d 8702int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync)
cbe82603
BH		 8703{
8704 struct rpc_task *task;
8705 struct rpc_message msg = {
8706 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
8707 .rpc_argp = &lrp->args,
8708 .rpc_resp = &lrp->res,
9556000d 8709 .rpc_cred = lrp->cred,
cbe82603
BH		 8710 };
8711 struct rpc_task_setup task_setup_data = {
1771c577 8712 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
cbe82603
BH		 8713 .rpc_message = &msg,
8714 .callback_ops = &nfs4_layoutreturn_call_ops,
8715 .callback_data = lrp,
8716 };
6c16605d 8717 int status = 0;
cbe82603 8718
99ade3c7
AE		 8719 nfs4_state_protect(NFS_SERVER(lrp->args.inode)->nfs_client,
8720 NFS_SP4_MACH_CRED_PNFS_CLEANUP,
8721 &task_setup_data.rpc_client, &msg);
8722
cbe82603 8723 dprintk("--> %s\n", __func__);
5a0ec8ac
TM		 8724 if (!sync) {
8725 lrp->inode = nfs_igrab_and_active(lrp->args.inode);
8726 if (!lrp->inode) {
8727 nfs4_layoutreturn_release(lrp);
8728 return -EAGAIN;
8729 }
8730 task_setup_data.flags |= RPC_TASK_ASYNC;
8731 }
a9c92d6b 8732 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 8733 task = rpc_run_task(&task_setup_data);
8734 if (IS_ERR(task))
8735 return PTR_ERR(task);
5a0ec8ac
TM		 8736 if (sync)
8737 status = task->tk_status;
48c9579a 8738 trace_nfs4_layoutreturn(lrp->args.inode, &lrp->args.stateid, status);
cbe82603
BH		 8739 dprintk("<-- %s status=%d\n", __func__, status);
8740 rpc_put_task(task);
8741 return status;
8742}
8743
b1f69b75 8744static int
cd5875fe
TM		 8745_nfs4_proc_getdeviceinfo(struct nfs_server *server,
8746 struct pnfs_device *pdev,
8747 struct rpc_cred *cred)
b1f69b75
AA		 8748{
8749 struct nfs4_getdeviceinfo_args args = {
8750 .pdev = pdev,
4e590803
TM		 8751 .notify_types = NOTIFY_DEVICEID4_CHANGE |
8752 NOTIFY_DEVICEID4_DELETE,
b1f69b75
AA		 8753 };
8754 struct nfs4_getdeviceinfo_res res = {
8755 .pdev = pdev,
8756 };
8757 struct rpc_message msg = {
8758 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
8759 .rpc_argp = &args,
8760 .rpc_resp = &res,
cd5875fe 8761 .rpc_cred = cred,
b1f69b75
AA		 8762 };
8763 int status;
8764
8765 dprintk("--> %s\n", __func__);
7c513058 8766 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4e590803
TM		 8767 if (res.notification & ~args.notify_types)
8768 dprintk("%s: unsupported notification\n", __func__);
df52699e
TM		 8769 if (res.notification != args.notify_types)
8770 pdev->nocache = 1;
4e590803 8771
b1f69b75
AA		 8772 dprintk("<-- %s status=%d\n", __func__, status);
8773
8774 return status;
8775}
8776
cd5875fe
TM		 8777int nfs4_proc_getdeviceinfo(struct nfs_server *server,
8778 struct pnfs_device *pdev,
8779 struct rpc_cred *cred)
b1f69b75
AA		 8780{
8781 struct nfs4_exception exception = { };
8782 int err;
8783
8784 do {
8785 err = nfs4_handle_exception(server,
cd5875fe 8786 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 8787 &exception);
8788 } while (exception.retry);
8789 return err;
8790}
8791EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
8792
863a3c6c
AA		 8793static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
8794{
8795 struct nfs4_layoutcommit_data *data = calldata;
8796 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 8797 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 8798
d9afbd1b
TM		 8799 nfs41_setup_sequence(session,
8800 &data->args.seq_args,
8801 &data->res.seq_res,
8802 task);
863a3c6c
AA		 8803}
8804
8805static void
8806nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
8807{
8808 struct nfs4_layoutcommit_data *data = calldata;
8809 struct nfs_server *server = NFS_SERVER(data->args.inode);
8810
6ba7db34 8811 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 8812 return;
8813
8814 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 8815 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
8816 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
8817 case -NFS4ERR_BADLAYOUT: /* no layout */
8818 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 8819 task->tk_status = 0;
e59d27e0 8820 case 0:
e59d27e0
TM		 8821 break;
8822 default:
8478eaa1 8823 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) {
e59d27e0
TM		 8824 rpc_restart_call_prepare(task);
8825 return;
8826 }
8827 }
863a3c6c
AA		 8828}
8829
8830static void nfs4_layoutcommit_release(void *calldata)
8831{
8832 struct nfs4_layoutcommit_data *data = calldata;
8833
db29c089 8834 pnfs_cleanup_layoutcommit(data);
d8c951c3
TM		 8835 nfs_post_op_update_inode_force_wcc(data->args.inode,
8836 data->res.fattr);
863a3c6c 8837 put_rpccred(data->cred);
472e2594 8838 nfs_iput_and_deactive(data->inode);
863a3c6c
AA		 8839 kfree(data);
8840}
8841
8842static const struct rpc_call_ops nfs4_layoutcommit_ops = {
8843 .rpc_call_prepare = nfs4_layoutcommit_prepare,
8844 .rpc_call_done = nfs4_layoutcommit_done,
8845 .rpc_release = nfs4_layoutcommit_release,
8846};
8847
8848int
ef311537 8849nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 8850{
8851 struct rpc_message msg = {
8852 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
8853 .rpc_argp = &data->args,
8854 .rpc_resp = &data->res,
8855 .rpc_cred = data->cred,
8856 };
8857 struct rpc_task_setup task_setup_data = {
8858 .task = &data->task,
8859 .rpc_client = NFS_CLIENT(data->args.inode),
8860 .rpc_message = &msg,
8861 .callback_ops = &nfs4_layoutcommit_ops,
8862 .callback_data = data,
863a3c6c
AA		 8863 };
8864 struct rpc_task *task;
8865 int status = 0;
8866
b4839ebe
KM		 8867 dprintk("NFS: initiating layoutcommit call. sync %d "
8868 "lbw: %llu inode %lu\n", sync,
863a3c6c
AA		 8869 data->args.lastbytewritten,
8870 data->args.inode->i_ino);
8871
472e2594
TM		 8872 if (!sync) {
8873 data->inode = nfs_igrab_and_active(data->args.inode);
8874 if (data->inode == NULL) {
8875 nfs4_layoutcommit_release(data);
8876 return -EAGAIN;
8877 }
8878 task_setup_data.flags = RPC_TASK_ASYNC;
8879 }
a9c92d6b 8880 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 8881 task = rpc_run_task(&task_setup_data);
8882 if (IS_ERR(task))
8883 return PTR_ERR(task);
472e2594
TM		 8884 if (sync)
8885 status = task->tk_status;
48c9579a 8886 trace_nfs4_layoutcommit(data->args.inode, &data->args.stateid, status);
863a3c6c
AA		 8887 dprintk("%s: status %d\n", __func__, status);
8888 rpc_put_task(task);
8889 return status;
8890}
fca78d6d 8891
97431204
AA		 8892/**
8893 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
8894 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
8895 */
fca78d6d
BS		 8896static int
8897_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
b1b3e136
WAA		 8898 struct nfs_fsinfo *info,
8899 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
fca78d6d
BS		 8900{
8901 struct nfs41_secinfo_no_name_args args = {
8902 .style = SECINFO_STYLE_CURRENT_FH,
8903 };
8904 struct nfs4_secinfo_res res = {
8905 .flavors = flavors,
8906 };
8907 struct rpc_message msg = {
8908 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
8909 .rpc_argp = &args,
8910 .rpc_resp = &res,
8911 };
b1b3e136 8912 struct rpc_clnt *clnt = server->client;
7cb852df 8913 struct rpc_cred *cred = NULL;
b1b3e136
WAA		 8914 int status;
8915
8916 if (use_integrity) {
8917 clnt = server->nfs_client->cl_rpcclient;
7cb852df
WAA		 8918 cred = nfs4_get_clid_cred(server->nfs_client);
8919 msg.rpc_cred = cred;
b1b3e136
WAA		 8920 }
8921
8922 dprintk("--> %s\n", __func__);
8923 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
8924 &res.seq_res, 0);
8925 dprintk("<-- %s status=%d\n", __func__, status);
8926
7cb852df
WAA		 8927 if (cred)
8928 put_rpccred(cred);
b1b3e136
WAA		 8929
8930 return status;
fca78d6d
BS		 8931}
8932
8933static int
8934nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8935 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
8936{
8937 struct nfs4_exception exception = { };
8938 int err;
8939 do {
b1b3e136
WAA		 8940 /* first try using integrity protection */
8941 err = -NFS4ERR_WRONGSEC;
8942
8943 /* try to use integrity protection with machine cred */
8944 if (_nfs4_is_integrity_protected(server->nfs_client))
8945 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8946 flavors, true);
8947
8948 /*
8949 * if unable to use integrity protection, or SECINFO with
8950 * integrity protection returns NFS4ERR_WRONGSEC (which is
8951 * disallowed by spec, but exists in deployed servers) use
8952 * the current filesystem's rpc_client and the user cred.
8953 */
8954 if (err == -NFS4ERR_WRONGSEC)
8955 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8956 flavors, false);
8957
fca78d6d
BS		 8958 switch (err) {
8959 case 0:
8960 case -NFS4ERR_WRONGSEC:
78b19bae 8961 case -ENOTSUPP:
05e9cfb4 8962 goto out;
fca78d6d
BS		 8963 default:
8964 err = nfs4_handle_exception(server, err, &exception);
8965 }
8966 } while (exception.retry);
05e9cfb4 8967out:
fca78d6d
BS		 8968 return err;
8969}
8970
8971static int
8972nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
8973 struct nfs_fsinfo *info)
8974{
8975 int err;
8976 struct page *page;
367156d9 8977 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
fca78d6d 8978 struct nfs4_secinfo_flavors *flavors;
58a8cf12
WAA		 8979 struct nfs4_secinfo4 *secinfo;
8980 int i;
fca78d6d
BS		 8981
8982 page = alloc_page(GFP_KERNEL);
8983 if (!page) {
8984 err = -ENOMEM;
8985 goto out;
8986 }
8987
8988 flavors = page_address(page);
8989 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
8990
8991 /*
8992 * Fall back on "guess and check" method if
8993 * the server doesn't support SECINFO_NO_NAME
8994 */
78b19bae 8995 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
fca78d6d
BS		 8996 err = nfs4_find_root_sec(server, fhandle, info);
8997 goto out_freepage;
8998 }
8999 if (err)
9000 goto out_freepage;
9001
58a8cf12
WAA		 9002 for (i = 0; i < flavors->num_flavors; i++) {
9003 secinfo = &flavors->flavors[i];
9004
9005 switch (secinfo->flavor) {
9006 case RPC_AUTH_NULL:
9007 case RPC_AUTH_UNIX:
9008 case RPC_AUTH_GSS:
9009 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
9010 &secinfo->flavor_info);
9011 break;
9012 default:
9013 flavor = RPC_AUTH_MAXFLAVOR;
9014 break;
9015 }
9016
4d4b69dd
WAA		 9017 if (!nfs_auth_info_match(&server->auth_info, flavor))
9018 flavor = RPC_AUTH_MAXFLAVOR;
9019
58a8cf12
WAA		 9020 if (flavor != RPC_AUTH_MAXFLAVOR) {
9021 err = nfs4_lookup_root_sec(server, fhandle,
9022 info, flavor);
9023 if (!err)
9024 break;
9025 }
9026 }
9027
9028 if (flavor == RPC_AUTH_MAXFLAVOR)
9029 err = -EPERM;
fca78d6d
BS		 9030
9031out_freepage:
9032 put_page(page);
9033 if (err == -EACCES)
9034 return -EPERM;
9035out:
9036 return err;
9037}
1cab0652 9038
ab7cb0df
TM		 9039static int _nfs41_test_stateid(struct nfs_server *server,
9040 nfs4_stateid *stateid,
9041 struct rpc_cred *cred)
7d974794
BS		 9042{
9043 int status;
9044 struct nfs41_test_stateid_args args = {
1cab0652 9045 .stateid = stateid,
7d974794
BS		 9046 };
9047 struct nfs41_test_stateid_res res;
9048 struct rpc_message msg = {
9049 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
9050 .rpc_argp = &args,
9051 .rpc_resp = &res,
ab7cb0df 9052 .rpc_cred = cred,
7d974794 9053 };
3787d506
WAA		 9054 struct rpc_clnt *rpc_client = server->client;
9055
9056 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
9057 &rpc_client, &msg);
1cab0652 9058
38527b15 9059 dprintk("NFS call test_stateid %p\n", stateid);
a9c92d6b 9060 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 9061 nfs4_set_sequence_privileged(&args.seq_args);
3787d506 9062 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8fe72bac 9063 &args.seq_args, &res.seq_res);
38527b15
CL		 9064 if (status != NFS_OK) {
9065 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 9066 return status;
38527b15
CL		 9067 }
9068 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 9069 return -res.status;
7d974794
BS		 9070}
9071
43912bbb
TM		 9072static void nfs4_handle_delay_or_session_error(struct nfs_server *server,
9073 int err, struct nfs4_exception *exception)
9074{
9075 exception->retry = 0;
9076 switch(err) {
9077 case -NFS4ERR_DELAY:
76e8a1bd 9078 case -NFS4ERR_RETRY_UNCACHED_REP:
43912bbb
TM		 9079 nfs4_handle_exception(server, err, exception);
9080 break;
9081 case -NFS4ERR_BADSESSION:
9082 case -NFS4ERR_BADSLOT:
9083 case -NFS4ERR_BAD_HIGH_SLOT:
9084 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
9085 case -NFS4ERR_DEADSESSION:
9086 nfs4_do_handle_exception(server, err, exception);
9087 }
9088}
9089
38527b15
CL		 9090/**
9091 * nfs41_test_stateid - perform a TEST_STATEID operation
9092 *
9093 * @server: server / transport on which to perform the operation
9094 * @stateid: state ID to test
ab7cb0df 9095 * @cred: credential
38527b15
CL		 9096 *
9097 * Returns NFS_OK if the server recognizes that "stateid" is valid.
9098 * Otherwise a negative NFS4ERR value is returned if the operation
9099 * failed or the state ID is not currently valid.
9100 */
ab7cb0df
TM		 9101static int nfs41_test_stateid(struct nfs_server *server,
9102 nfs4_stateid *stateid,
9103 struct rpc_cred *cred)
7d974794
BS		 9104{
9105 struct nfs4_exception exception = { };
9106 int err;
9107 do {
ab7cb0df 9108 err = _nfs41_test_stateid(server, stateid, cred);
43912bbb 9109 nfs4_handle_delay_or_session_error(server, err, &exception);
7d974794
BS		 9110 } while (exception.retry);
9111 return err;
9112}
9aeda35f 9113
7c1d5fae
TM		 9114struct nfs_free_stateid_data {
9115 struct nfs_server *server;
9116 struct nfs41_free_stateid_args args;
9aeda35f 9117 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 9118};
9119
9120static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
9121{
9122 struct nfs_free_stateid_data *data = calldata;
9123 nfs41_setup_sequence(nfs4_get_session(data->server),
9124 &data->args.seq_args,
9125 &data->res.seq_res,
9126 task);
9127}
9128
9129static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
9130{
9131 struct nfs_free_stateid_data *data = calldata;
9132
9133 nfs41_sequence_done(task, &data->res.seq_res);
9134
9135 switch (task->tk_status) {
9136 case -NFS4ERR_DELAY:
8478eaa1 9137 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN)
7c1d5fae
TM		 9138 rpc_restart_call_prepare(task);
9139 }
9140}
9141
9142static void nfs41_free_stateid_release(void *calldata)
9143{
9144 kfree(calldata);
9145}
9146
17f26b12 9147static const struct rpc_call_ops nfs41_free_stateid_ops = {
7c1d5fae
TM		 9148 .rpc_call_prepare = nfs41_free_stateid_prepare,
9149 .rpc_call_done = nfs41_free_stateid_done,
9150 .rpc_release = nfs41_free_stateid_release,
9151};
9152
9153static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
f0b0bf88 9154 const nfs4_stateid *stateid,
ab7cb0df 9155 struct rpc_cred *cred,
7c1d5fae
TM		 9156 bool privileged)
9157{
9aeda35f
BS		 9158 struct rpc_message msg = {
9159 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 9160 .rpc_cred = cred,
9aeda35f 9161 };
7c1d5fae
TM		 9162 struct rpc_task_setup task_setup = {
9163 .rpc_client = server->client,
9164 .rpc_message = &msg,
9165 .callback_ops = &nfs41_free_stateid_ops,
9166 .flags = RPC_TASK_ASYNC,
9167 };
9168 struct nfs_free_stateid_data *data;
9aeda35f 9169
3787d506
WAA		 9170 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
9171 &task_setup.rpc_client, &msg);
9172
38527b15 9173 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 9174 data = kmalloc(sizeof(*data), GFP_NOFS);
9175 if (!data)
9176 return ERR_PTR(-ENOMEM);
9177 data->server = server;
9178 nfs4_stateid_copy(&data->args.stateid, stateid);
9179
9180 task_setup.callback_data = data;
9181
9182 msg.rpc_argp = &data->args;
9183 msg.rpc_resp = &data->res;
76e8a1bd 9184 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
7c1d5fae
TM		 9185 if (privileged)
9186 nfs4_set_sequence_privileged(&data->args.seq_args);
9187
9188 return rpc_run_task(&task_setup);
9aeda35f
BS		 9189}
9190
38527b15
CL		 9191/**
9192 * nfs41_free_stateid - perform a FREE_STATEID operation
9193 *
9194 * @server: server / transport on which to perform the operation
9195 * @stateid: state ID to release
ab7cb0df 9196 * @cred: credential
f0b0bf88 9197 * @is_recovery: set to true if this call needs to be privileged
38527b15 9198 *
f0b0bf88 9199 * Note: this function is always asynchronous.
38527b15 9200 */
ab7cb0df 9201static int nfs41_free_stateid(struct nfs_server *server,
f0b0bf88
TM		 9202 const nfs4_stateid *stateid,
9203 struct rpc_cred *cred,
9204 bool is_recovery)
9aeda35f 9205{
7c1d5fae 9206 struct rpc_task *task;
7c1d5fae 9207
f0b0bf88 9208 task = _nfs41_free_stateid(server, stateid, cred, is_recovery);
7c1d5fae
TM		 9209 if (IS_ERR(task))
9210 return PTR_ERR(task);
7c1d5fae 9211 rpc_put_task(task);
f0b0bf88 9212 return 0;
9aeda35f 9213}
36281caa 9214
f1cdae87
JL		 9215static void
9216nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
c8b2d0bf 9217{
ab7cb0df 9218 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 9219
f0b0bf88 9220 nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf 9221 nfs4_free_lock_state(server, lsp);
c8b2d0bf
TM		 9222}
9223
36281caa
TM		 9224static bool nfs41_match_stateid(const nfs4_stateid *s1,
9225 const nfs4_stateid *s2)
9226{
93b717fd
TM		 9227 if (s1->type != s2->type)
9228 return false;
9229
2d2f24ad 9230 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 9231 return false;
9232
2d2f24ad 9233 if (s1->seqid == s2->seqid)
36281caa 9234 return true;
2d2f24ad 9235 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 9236 return true;
9237
9238 return false;
9239}
9240
557134a3
AA		 9241#endif /* CONFIG_NFS_V4_1 */
9242
36281caa
TM		 9243static bool nfs4_match_stateid(const nfs4_stateid *s1,
9244 const nfs4_stateid *s2)
9245{
f597c537 9246 return nfs4_stateid_match(s1, s2);
36281caa
TM		 9247}
9248
9249
17280175 9250static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 9251 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 9252 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 9253 .recover_open = nfs4_open_reclaim,
9254 .recover_lock = nfs4_lock_reclaim,
591d71cb 9255 .establish_clid = nfs4_init_clientid,
05f4c350 9256 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 9257};
9258
591d71cb 9259#if defined(CONFIG_NFS_V4_1)
17280175 9260static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 9261 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
9262 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
9263 .recover_open = nfs4_open_reclaim,
9264 .recover_lock = nfs4_lock_reclaim,
4d643d1d 9265 .establish_clid = nfs41_init_clientid,
fce5c838 9266 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 9267 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 9268};
9269#endif /* CONFIG_NFS_V4_1 */
9270
17280175 9271static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 9272 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
9273 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
4dfd4f7a 9274 .recover_open = nfs40_open_expired,
591d71cb
AA		 9275 .recover_lock = nfs4_lock_expired,
9276 .establish_clid = nfs4_init_clientid,
9277};
9278
9279#if defined(CONFIG_NFS_V4_1)
17280175 9280static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 9281 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 9282 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 9283 .recover_open = nfs41_open_expired,
9284 .recover_lock = nfs41_lock_expired,
4d643d1d 9285 .establish_clid = nfs41_init_clientid,
1da177e4 9286};
591d71cb 9287#endif /* CONFIG_NFS_V4_1 */
1da177e4 9288
17280175 9289static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 9290 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 9291 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 9292 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 9293};
9294
9295#if defined(CONFIG_NFS_V4_1)
17280175 9296static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 9297 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 9298 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 9299 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 9300};
9301#endif
9302
ec011fe8 9303static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
b03d735b 9304 .get_locations = _nfs40_proc_get_locations,
44c99933 9305 .fsid_present = _nfs40_proc_fsid_present,
ec011fe8
CL		 9306};
9307
9308#if defined(CONFIG_NFS_V4_1)
9309static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
b03d735b 9310 .get_locations = _nfs41_proc_get_locations,
44c99933 9311 .fsid_present = _nfs41_proc_fsid_present,
ec011fe8
CL		 9312};
9313#endif /* CONFIG_NFS_V4_1 */
9314
97dc1359
TM		 9315static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
9316 .minor_version = 0,
39c6daae
TM		 9317 .init_caps = NFS_CAP_READDIRPLUS
9318 | NFS_CAP_ATOMIC_OPEN
39c6daae 9319 | NFS_CAP_POSIX_LOCK,
abf79bb3
CL		 9320 .init_client = nfs40_init_client,
9321 .shutdown_client = nfs40_shutdown_client,
36281caa 9322 .match_stateid = nfs4_match_stateid,
fca78d6d 9323 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 9324 .free_lock_state = nfs4_release_lockowner,
45870d69 9325 .test_and_free_expired = nfs40_test_and_free_expired_stateid,
63f5f796 9326 .alloc_seqid = nfs_alloc_seqid,
9915ea7e 9327 .call_sync_ops = &nfs40_call_sync_ops,
c48f4f35
TM		 9328 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
9329 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
9330 .state_renewal_ops = &nfs40_state_renewal_ops,
ec011fe8 9331 .mig_recovery_ops = &nfs40_mig_recovery_ops,
97dc1359
TM		 9332};
9333
9334#if defined(CONFIG_NFS_V4_1)
63f5f796
TM		 9335static struct nfs_seqid *
9336nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2)
9337{
9338 return NULL;
9339}
9340
97dc1359
TM		 9341static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
9342 .minor_version = 1,
39c6daae
TM		 9343 .init_caps = NFS_CAP_READDIRPLUS
9344 | NFS_CAP_ATOMIC_OPEN
3b66486c 9345 | NFS_CAP_POSIX_LOCK
49f9a0fa 9346 | NFS_CAP_STATEID_NFSV41
e983120e 9347 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 9348 .init_client = nfs41_init_client,
9349 .shutdown_client = nfs41_shutdown_client,
36281caa 9350 .match_stateid = nfs41_match_stateid,
fca78d6d 9351 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 9352 .free_lock_state = nfs41_free_lock_state,
45870d69 9353 .test_and_free_expired = nfs41_test_and_free_expired_stateid,
63f5f796 9354 .alloc_seqid = nfs_alloc_no_seqid,
04fa2c6b 9355 .session_trunk = nfs4_test_session_trunk,
9915ea7e 9356 .call_sync_ops = &nfs41_call_sync_ops,
c48f4f35
TM		 9357 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
9358 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
9359 .state_renewal_ops = &nfs41_state_renewal_ops,
ec011fe8 9360 .mig_recovery_ops = &nfs41_mig_recovery_ops,
97dc1359
TM		 9361};
9362#endif
9363
42c2c424
SD		 9364#if defined(CONFIG_NFS_V4_2)
9365static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
9366 .minor_version = 2,
7017310a
BS		 9367 .init_caps = NFS_CAP_READDIRPLUS
9368 | NFS_CAP_ATOMIC_OPEN
7017310a
BS		 9369 | NFS_CAP_POSIX_LOCK
9370 | NFS_CAP_STATEID_NFSV41
e983120e 9371 | NFS_CAP_ATOMIC_OPEN_V1
f4ac1674 9372 | NFS_CAP_ALLOCATE
2e72448b 9373 | NFS_CAP_COPY
624bd5b7 9374 | NFS_CAP_DEALLOCATE
6c5a0d89 9375 | NFS_CAP_SEEK
e5341f3a
PT		 9376 | NFS_CAP_LAYOUTSTATS
9377 | NFS_CAP_CLONE,
abf79bb3
CL		 9378 .init_client = nfs41_init_client,
9379 .shutdown_client = nfs41_shutdown_client,
42c2c424
SD		 9380 .match_stateid = nfs41_match_stateid,
9381 .find_root_sec = nfs41_find_root_sec,
7017310a 9382 .free_lock_state = nfs41_free_lock_state,
9915ea7e 9383 .call_sync_ops = &nfs41_call_sync_ops,
45870d69 9384 .test_and_free_expired = nfs41_test_and_free_expired_stateid,
63f5f796 9385 .alloc_seqid = nfs_alloc_no_seqid,
04fa2c6b 9386 .session_trunk = nfs4_test_session_trunk,
42c2c424
SD		 9387 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
9388 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
9389 .state_renewal_ops = &nfs41_state_renewal_ops,
18e3b739 9390 .mig_recovery_ops = &nfs41_mig_recovery_ops,
42c2c424
SD		 9391};
9392#endif
9393
97dc1359
TM		 9394const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
9395 [0] = &nfs_v4_0_minor_ops,
9396#if defined(CONFIG_NFS_V4_1)
9397 [1] = &nfs_v4_1_minor_ops,
9398#endif
42c2c424
SD		 9399#if defined(CONFIG_NFS_V4_2)
9400 [2] = &nfs_v4_2_minor_ops,
9401#endif
97dc1359
TM		 9402};
9403
13997823 9404static ssize_t nfs4_listxattr(struct dentry *dentry, char *list, size_t size)
c4803c49
AG		 9405{
9406 ssize_t error, error2;
9407
9408 error = generic_listxattr(dentry, list, size);
9409 if (error < 0)
9410 return error;
9411 if (list) {
9412 list += error;
9413 size -= error;
9414 }
9415
9416 error2 = nfs4_listxattr_nfs4_label(d_inode(dentry), list, size);
9417 if (error2 < 0)
9418 return error2;
9419 return error + error2;
9420}
9421
17f26b12 9422static const struct inode_operations nfs4_dir_inode_operations = {
73a79706
BS		 9423 .create = nfs_create,
9424 .lookup = nfs_lookup,
9425 .atomic_open = nfs_atomic_open,
9426 .link = nfs_link,
9427 .unlink = nfs_unlink,
9428 .symlink = nfs_symlink,
9429 .mkdir = nfs_mkdir,
9430 .rmdir = nfs_rmdir,
9431 .mknod = nfs_mknod,
9432 .rename = nfs_rename,
9433 .permission = nfs_permission,
9434 .getattr = nfs_getattr,
9435 .setattr = nfs_setattr,
c4803c49 9436 .listxattr = nfs4_listxattr,
73a79706
BS		 9437};
9438
92e1d5be 9439static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 9440 .permission = nfs_permission,
9441 .getattr = nfs_getattr,
9442 .setattr = nfs_setattr,
c4803c49 9443 .listxattr = nfs4_listxattr,
6b3b5496
BF		 9444};
9445
509de811 9446const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 9447 .version = 4, /* protocol version */
9448 .dentry_ops = &nfs4_dentry_operations,
9449 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 9450 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 9451 .file_ops = &nfs4_file_operations,
1da177e4 9452 .getroot = nfs4_proc_get_root,
281cad46 9453 .submount = nfs4_submount,
ff9099f2 9454 .try_mount = nfs4_try_mount,
1da177e4
LT		 9455 .getattr = nfs4_proc_getattr,
9456 .setattr = nfs4_proc_setattr,
9457 .lookup = nfs4_proc_lookup,
9458 .access = nfs4_proc_access,
9459 .readlink = nfs4_proc_readlink,
1da177e4
LT		 9460 .create = nfs4_proc_create,
9461 .remove = nfs4_proc_remove,
9462 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 9463 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4 9464 .unlink_done = nfs4_proc_unlink_done,
d3d4152a 9465 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 9466 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 9467 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 9468 .link = nfs4_proc_link,
9469 .symlink = nfs4_proc_symlink,
9470 .mkdir = nfs4_proc_mkdir,
9471 .rmdir = nfs4_proc_remove,
9472 .readdir = nfs4_proc_readdir,
9473 .mknod = nfs4_proc_mknod,
9474 .statfs = nfs4_proc_statfs,
9475 .fsinfo = nfs4_proc_fsinfo,
9476 .pathconf = nfs4_proc_pathconf,
e9326dca 9477 .set_capabilities = nfs4_server_capabilities,
1da177e4 9478 .decode_dirent = nfs4_decode_dirent,
a4cdda59 9479 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
1da177e4 9480 .read_setup = nfs4_proc_read_setup,
ec06c096 9481 .read_done = nfs4_read_done,
1da177e4 9482 .write_setup = nfs4_proc_write_setup,
788e7a89 9483 .write_done = nfs4_write_done,
1da177e4 9484 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 9485 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 9486 .commit_done = nfs4_commit_done,
1da177e4 9487 .lock = nfs4_proc_lock,
e50a1c2e 9488 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 9489 .close_context = nfs4_close_context,
2b484297 9490 .open_context = nfs4_atomic_open,
011e2a7f 9491 .have_delegation = nfs4_have_delegation,
57ec14c5 9492 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 9493 .alloc_client = nfs4_alloc_client,
45a52a02 9494 .init_client = nfs4_init_client,
cdb7eced 9495 .free_client = nfs4_free_client,
1179acc6
BS		 9496 .create_server = nfs4_create_server,
9497 .clone_server = nfs_clone_server,
1da177e4
LT		 9498};
9499
64c2ce8b 9500static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
98e9cb57 9501 .name = XATTR_NAME_NFSV4_ACL,
64c2ce8b
AK		 9502 .list = nfs4_xattr_list_nfs4_acl,
9503 .get = nfs4_xattr_get_nfs4_acl,
9504 .set = nfs4_xattr_set_nfs4_acl,
9505};
9506
9507const struct xattr_handler *nfs4_xattr_handlers[] = {
9508 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 9509#ifdef CONFIG_NFS_V4_SECURITY_LABEL
9510 &nfs4_xattr_nfs4_label_handler,
9511#endif
64c2ce8b
AK		 9512 NULL
9513};
9514
1da177e4
LT		 9515/*
9516 * Local variables:
9517 * c-basic-offset: 8
9518 * End:
9519 */
Ubuntu Artful kernel mirror