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NFS: Remove nfs4_recover_expired_lease()
[mirror_ubuntu-hirsute-kernel.git] / fs / nfs / nfs4proc.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
1da177e4
LT		 39#include <linux/delay.h>
40#include <linux/errno.h>
41#include <linux/string.h>
652f89f6
TM		 42#include <linux/ratelimit.h>
43#include <linux/printk.h>
5a0e3ad6 44#include <linux/slab.h>
1da177e4
LT		 45#include <linux/sunrpc/clnt.h>
46#include <linux/nfs.h>
47#include <linux/nfs4.h>
48#include <linux/nfs_fs.h>
49#include <linux/nfs_page.h>
9b7160c5 50#include <linux/nfs_mount.h>
1da177e4 51#include <linux/namei.h>
02a913a7 52#include <linux/mount.h>
99fe60d0 53#include <linux/module.h>
64c2ce8b 54#include <linux/xattr.h>
c7a360b0 55#include <linux/utsname.h>
d310310c 56#include <linux/freezer.h>
1da177e4 57
4ce79717 58#include "nfs4_fs.h"
1da177e4 59#include "delegation.h"
101070ca 60#include "internal.h"
006ea73e 61#include "iostat.h"
fc931582 62#include "callback.h"
b1f69b75 63#include "pnfs.h"
f092075d 64#include "netns.h"
40c64c26 65#include "nfs4idmap.h"
73e39aaa 66#include "nfs4session.h"
de242c0b 67#include "fscache.h"
1da177e4 68
c6d01c6f
TM		 69#include "nfs4trace.h"
70
1da177e4
LT		 71#define NFSDBG_FACILITY NFSDBG_PROC
72
2066fe89 73#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 74#define NFS4_POLL_RETRY_MAX (15*HZ)
75
a1d1c4f1
TM		 76/* file attributes which can be mapped to nfs attributes */
77#define NFS4_VALID_ATTRS (ATTR_MODE \
78 | ATTR_UID \
79 | ATTR_GID \
80 | ATTR_SIZE \
81 | ATTR_ATIME \
82 | ATTR_MTIME \
83 | ATTR_CTIME \
84 | ATTR_ATIME_SET \
85 | ATTR_MTIME_SET)
86
cdd4e68b 87struct nfs4_opendata;
864472e9 88static int _nfs4_proc_open(struct nfs4_opendata *data);
b257957e 89static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 90static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
81934ddb 91static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
1775fd3e
DQ		 92static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, struct nfs4_label *label);
93static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label);
0ab64e0e
TM		 94static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
95 struct nfs_fattr *fattr, struct iattr *sattr,
29b59f94 96 struct nfs_open_context *ctx, struct nfs4_label *ilabel,
1775fd3e 97 struct nfs4_label *olabel);
f062eb6c 98#ifdef CONFIG_NFS_V4_1
ab7cb0df
TM		 99static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *,
100 struct rpc_cred *);
f0b0bf88
TM		 101static int nfs41_free_stateid(struct nfs_server *, const nfs4_stateid *,
102 struct rpc_cred *, bool);
f062eb6c 103#endif
aa9c2669
DQ		 104
105#ifdef CONFIG_NFS_V4_SECURITY_LABEL
106static inline struct nfs4_label *
107nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
108 struct iattr *sattr, struct nfs4_label *label)
109{
110 int err;
111
112 if (label == NULL)
113 return NULL;
114
115 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0)
116 return NULL;
117
aa9c2669
DQ		 118 err = security_dentry_init_security(dentry, sattr->ia_mode,
119 &dentry->d_name, (void **)&label->label, &label->len);
120 if (err == 0)
121 return label;
122
123 return NULL;
124}
125static inline void
126nfs4_label_release_security(struct nfs4_label *label)
127{
128 if (label)
129 security_release_secctx(label->label, label->len);
130}
131static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
132{
133 if (label)
134 return server->attr_bitmask;
135
136 return server->attr_bitmask_nl;
137}
138#else
139static inline struct nfs4_label *
140nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
141 struct iattr *sattr, struct nfs4_label *l)
142{ return NULL; }
143static inline void
144nfs4_label_release_security(struct nfs4_label *label)
145{ return; }
146static inline u32 *
147nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
148{ return server->attr_bitmask; }
149#endif
150
1da177e4 151/* Prevent leaks of NFSv4 errors into userland */
46f72f57 152static int nfs4_map_errors(int err)
1da177e4 153{
52567b03
TM		 154 if (err >= -1000)
155 return err;
156 switch (err) {
157 case -NFS4ERR_RESOURCE:
30005121
WAA		 158 case -NFS4ERR_LAYOUTTRYLATER:
159 case -NFS4ERR_RECALLCONFLICT:
52567b03 160 return -EREMOTEIO;
7ebb9315 161 case -NFS4ERR_WRONGSEC:
8897538e 162 case -NFS4ERR_WRONG_CRED:
7ebb9315 163 return -EPERM;
3ddeb7c5
TM		 164 case -NFS4ERR_BADOWNER:
165 case -NFS4ERR_BADNAME:
166 return -EINVAL;
fb13bfa7
TM		 167 case -NFS4ERR_SHARE_DENIED:
168 return -EACCES;
f25efd85
SD		 169 case -NFS4ERR_MINOR_VERS_MISMATCH:
170 return -EPROTONOSUPPORT;
6e3cf241
TM		 171 case -NFS4ERR_FILE_OPEN:
172 return -EBUSY;
52567b03 173 default:
1da177e4 174 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 175 __func__, -err);
52567b03 176 break;
1da177e4 177 }
52567b03 178 return -EIO;
1da177e4
LT		 179}
180
181/*
182 * This is our standard bitmap for GETATTR requests.
183 */
1549210f 184const u32 nfs4_fattr_bitmap[3] = {
1da177e4
LT		 185 FATTR4_WORD0_TYPE
186 | FATTR4_WORD0_CHANGE
187 | FATTR4_WORD0_SIZE
188 | FATTR4_WORD0_FSID
189 | FATTR4_WORD0_FILEID,
190 FATTR4_WORD1_MODE
191 | FATTR4_WORD1_NUMLINKS
192 | FATTR4_WORD1_OWNER
193 | FATTR4_WORD1_OWNER_GROUP
194 | FATTR4_WORD1_RAWDEV
195 | FATTR4_WORD1_SPACE_USED
196 | FATTR4_WORD1_TIME_ACCESS
197 | FATTR4_WORD1_TIME_METADATA
ea96d1ec
AS		 198 | FATTR4_WORD1_TIME_MODIFY
199 | FATTR4_WORD1_MOUNTED_ON_FILEID,
aa9c2669
DQ		 200#ifdef CONFIG_NFS_V4_SECURITY_LABEL
201 FATTR4_WORD2_SECURITY_LABEL
202#endif
1da177e4
LT		 203};
204
1549210f
TM		 205static const u32 nfs4_pnfs_open_bitmap[3] = {
206 FATTR4_WORD0_TYPE
207 | FATTR4_WORD0_CHANGE
208 | FATTR4_WORD0_SIZE
209 | FATTR4_WORD0_FSID
210 | FATTR4_WORD0_FILEID,
211 FATTR4_WORD1_MODE
212 | FATTR4_WORD1_NUMLINKS
213 | FATTR4_WORD1_OWNER
214 | FATTR4_WORD1_OWNER_GROUP
215 | FATTR4_WORD1_RAWDEV
216 | FATTR4_WORD1_SPACE_USED
217 | FATTR4_WORD1_TIME_ACCESS
218 | FATTR4_WORD1_TIME_METADATA
219 | FATTR4_WORD1_TIME_MODIFY,
220 FATTR4_WORD2_MDSTHRESHOLD
95864c91
TM		 221#ifdef CONFIG_NFS_V4_SECURITY_LABEL
222 | FATTR4_WORD2_SECURITY_LABEL
223#endif
1549210f
TM		 224};
225
e23008ec
AA		 226static const u32 nfs4_open_noattr_bitmap[3] = {
227 FATTR4_WORD0_TYPE
e23008ec
AA		 228 | FATTR4_WORD0_FILEID,
229};
230
a09df2ca 231const u32 nfs4_statfs_bitmap[3] = {
1da177e4
LT		 232 FATTR4_WORD0_FILES_AVAIL
233 | FATTR4_WORD0_FILES_FREE
234 | FATTR4_WORD0_FILES_TOTAL,
235 FATTR4_WORD1_SPACE_AVAIL
236 | FATTR4_WORD1_SPACE_FREE
237 | FATTR4_WORD1_SPACE_TOTAL
238};
239
a09df2ca 240const u32 nfs4_pathconf_bitmap[3] = {
1da177e4
LT		 241 FATTR4_WORD0_MAXLINK
242 | FATTR4_WORD0_MAXNAME,
243 0
244};
245
dae100c2 246const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
1da177e4
LT		 247 | FATTR4_WORD0_MAXREAD
248 | FATTR4_WORD0_MAXWRITE
249 | FATTR4_WORD0_LEASE_TIME,
55b6e774 250 FATTR4_WORD1_TIME_DELTA
dae100c2
FI		 251 | FATTR4_WORD1_FS_LAYOUT_TYPES,
252 FATTR4_WORD2_LAYOUT_BLKSIZE
2a92ee92 253 | FATTR4_WORD2_CLONE_BLKSIZE
1da177e4
LT		 254};
255
a09df2ca 256const u32 nfs4_fs_locations_bitmap[3] = {
830b8e33
MN		 257 FATTR4_WORD0_TYPE
258 | FATTR4_WORD0_CHANGE
259 | FATTR4_WORD0_SIZE
260 | FATTR4_WORD0_FSID
261 | FATTR4_WORD0_FILEID
262 | FATTR4_WORD0_FS_LOCATIONS,
263 FATTR4_WORD1_MODE
264 | FATTR4_WORD1_NUMLINKS
265 | FATTR4_WORD1_OWNER
266 | FATTR4_WORD1_OWNER_GROUP
267 | FATTR4_WORD1_RAWDEV
268 | FATTR4_WORD1_SPACE_USED
269 | FATTR4_WORD1_TIME_ACCESS
270 | FATTR4_WORD1_TIME_METADATA
271 | FATTR4_WORD1_TIME_MODIFY
a09df2ca 272 | FATTR4_WORD1_MOUNTED_ON_FILEID,
830b8e33
MN		 273};
274
bc4785cd 275static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 276 struct nfs4_readdir_arg *readdir)
277{
0dbb4c67 278 __be32 *start, *p;
1da177e4 279
1da177e4 280 if (cookie > 2) {
b7ef1956 281 readdir->cookie = cookie;
1da177e4
LT		 282 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
283 return;
284 }
285
286 readdir->cookie = 0;
287 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
288 if (cookie == 2)
289 return;
290
291 /*
292 * NFSv4 servers do not return entries for '.' and '..'
293 * Therefore, we fake these entries here. We let '.'
294 * have cookie 0 and '..' have cookie 1. Note that
295 * when talking to the server, we always send cookie 0
296 * instead of 1 or 2.
297 */
2b86ce2d 298 start = p = kmap_atomic(*readdir->pages);
1da177e4
LT		 299
300 if (cookie == 0) {
301 *p++ = xdr_one; /* next */
302 *p++ = xdr_zero; /* cookie, first word */
303 *p++ = xdr_one; /* cookie, second word */
304 *p++ = xdr_one; /* entry len */
305 memcpy(p, ".\0\0\0", 4); /* entry */
306 p++;
307 *p++ = xdr_one; /* bitmap length */
308 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
309 *p++ = htonl(8); /* attribute buffer length */
2b0143b5 310 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry)));
1da177e4
LT		 311 }
312
313 *p++ = xdr_one; /* next */
314 *p++ = xdr_zero; /* cookie, first word */
315 *p++ = xdr_two; /* cookie, second word */
316 *p++ = xdr_two; /* entry len */
317 memcpy(p, "..\0\0", 4); /* entry */
318 p++;
319 *p++ = xdr_one; /* bitmap length */
320 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
321 *p++ = htonl(8); /* attribute buffer length */
2b0143b5 322 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry->d_parent)));
1da177e4
LT		 323
324 readdir->pgbase = (char *)p - (char *)start;
325 readdir->count -= readdir->pgbase;
2b86ce2d 326 kunmap_atomic(start);
1da177e4
LT		 327}
328
26d36301
TM		 329static void nfs4_test_and_free_stateid(struct nfs_server *server,
330 nfs4_stateid *stateid,
331 struct rpc_cred *cred)
332{
333 const struct nfs4_minor_version_ops *ops = server->nfs_client->cl_mvops;
334
335 ops->test_and_free_expired(server, stateid, cred);
336}
337
338static void __nfs4_free_revoked_stateid(struct nfs_server *server,
339 nfs4_stateid *stateid,
340 struct rpc_cred *cred)
341{
342 stateid->type = NFS4_REVOKED_STATEID_TYPE;
343 nfs4_test_and_free_stateid(server, stateid, cred);
344}
345
346static void nfs4_free_revoked_stateid(struct nfs_server *server,
347 const nfs4_stateid *stateid,
348 struct rpc_cred *cred)
349{
350 nfs4_stateid tmp;
351
352 nfs4_stateid_copy(&tmp, stateid);
353 __nfs4_free_revoked_stateid(server, &tmp, cred);
354}
355
8478eaa1
N		 356static long nfs4_update_delay(long *timeout)
357{
358 long ret;
359 if (!timeout)
360 return NFS4_POLL_RETRY_MAX;
361 if (*timeout <= 0)
362 *timeout = NFS4_POLL_RETRY_MIN;
363 if (*timeout > NFS4_POLL_RETRY_MAX)
364 *timeout = NFS4_POLL_RETRY_MAX;
365 ret = *timeout;
366 *timeout <<= 1;
367 return ret;
368}
369
65de872e
TM		 370static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
371{
372 int res = 0;
373
374 might_sleep();
375
8478eaa1
N		 376 freezable_schedule_timeout_killable_unsafe(
377 nfs4_update_delay(timeout));
65de872e
TM		 378 if (fatal_signal_pending(current))
379 res = -ERESTARTSYS;
65de872e
TM		 380 return res;
381}
382
383/* This is the error handling routine for processes that are allowed
384 * to sleep.
385 */
b3c2aa07
TM		 386static int nfs4_do_handle_exception(struct nfs_server *server,
387 int errorcode, struct nfs4_exception *exception)
65de872e
TM		 388{
389 struct nfs_client *clp = server->nfs_client;
9e33bed5 390 struct nfs4_state *state = exception->state;
8487c479 391 const nfs4_stateid *stateid = exception->stateid;
3114ea7a 392 struct inode *inode = exception->inode;
65de872e
TM		 393 int ret = errorcode;
394
b3c2aa07
TM		 395 exception->delay = 0;
396 exception->recovering = 0;
65de872e 397 exception->retry = 0;
272289a3
TM		 398
399 if (stateid == NULL && state != NULL)
400 stateid = &state->stateid;
401
65de872e
TM		 402 switch(errorcode) {
403 case 0:
404 return 0;
5ba12443
TM		 405 case -NFS4ERR_DELEG_REVOKED:
406 case -NFS4ERR_ADMIN_REVOKED:
272289a3 407 case -NFS4ERR_EXPIRED:
5ba12443 408 case -NFS4ERR_BAD_STATEID:
272289a3
TM		 409 if (inode != NULL && stateid != NULL) {
410 nfs_inode_find_state_and_recover(inode,
411 stateid);
412 goto wait_on_recovery;
413 }
414 case -NFS4ERR_OPENMODE:
8487c479
TM		 415 if (inode) {
416 int err;
417
418 err = nfs_async_inode_return_delegation(inode,
419 stateid);
420 if (err == 0)
421 goto wait_on_recovery;
422 if (stateid != NULL && stateid->type == NFS4_DELEGATION_STATEID_TYPE) {
423 exception->retry = 1;
424 break;
425 }
426 }
3114ea7a
TM		 427 if (state == NULL)
428 break;
5d422301
TM		 429 ret = nfs4_schedule_stateid_recovery(server, state);
430 if (ret < 0)
431 break;
3114ea7a 432 goto wait_on_recovery;
65de872e 433 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 434 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 435 nfs4_schedule_lease_recovery(clp);
436 goto wait_on_recovery;
519ae255
CL		 437 case -NFS4ERR_MOVED:
438 ret = nfs4_schedule_migration_recovery(server);
439 if (ret < 0)
440 break;
441 goto wait_on_recovery;
8ef2f8d4
CL		 442 case -NFS4ERR_LEASE_MOVED:
443 nfs4_schedule_lease_moved_recovery(clp);
444 goto wait_on_recovery;
03391693 445#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 446 case -NFS4ERR_BADSESSION:
447 case -NFS4ERR_BADSLOT:
448 case -NFS4ERR_BAD_HIGH_SLOT:
449 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
450 case -NFS4ERR_DEADSESSION:
451 case -NFS4ERR_SEQ_FALSE_RETRY:
452 case -NFS4ERR_SEQ_MISORDERED:
453 dprintk("%s ERROR: %d Reset session\n", __func__,
454 errorcode);
9f594791 455 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
399f11c3 456 goto wait_on_recovery;
03391693 457#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 458 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 459 if (exception->timeout > HZ) {
460 /* We have retried a decent amount, time to
461 * fail
462 */
463 ret = -EBUSY;
464 break;
465 }
65de872e 466 case -NFS4ERR_DELAY:
2598ed34
TM		 467 nfs_inc_server_stats(server, NFSIOS_DELAY);
468 case -NFS4ERR_GRACE:
e85d7ee4 469 case -NFS4ERR_LAYOUTTRYLATER:
183d9e7b 470 case -NFS4ERR_RECALLCONFLICT:
b3c2aa07
TM		 471 exception->delay = 1;
472 return 0;
473
a8a4ae3a 474 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 475 case -NFS4ERR_OLD_STATEID:
476 exception->retry = 1;
b064eca2
TM		 477 break;
478 case -NFS4ERR_BADOWNER:
479 /* The following works around a Linux server bug! */
480 case -NFS4ERR_BADNAME:
481 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
482 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
483 exception->retry = 1;
484 printk(KERN_WARNING "NFS: v4 server %s "
485 "does not accept raw "
486 "uid/gids. "
487 "Reenabling the idmapper.\n",
488 server->nfs_client->cl_hostname);
489 }
65de872e
TM		 490 }
491 /* We failed to handle the error */
492 return nfs4_map_errors(ret);
0400a6b0 493wait_on_recovery:
b3c2aa07
TM		 494 exception->recovering = 1;
495 return 0;
496}
497
498/* This is the error handling routine for processes that are allowed
499 * to sleep.
500 */
501int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
502{
503 struct nfs_client *clp = server->nfs_client;
504 int ret;
505
506 ret = nfs4_do_handle_exception(server, errorcode, exception);
507 if (exception->delay) {
508 ret = nfs4_delay(server->client, &exception->timeout);
509 goto out_retry;
510 }
511 if (exception->recovering) {
512 ret = nfs4_wait_clnt_recover(clp);
513 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
514 return -EIO;
515 goto out_retry;
516 }
517 return ret;
518out_retry:
a2c0b9e2
TM		 519 if (ret == 0)
520 exception->retry = 1;
521 return ret;
65de872e
TM		 522}
523
037fc980
TM		 524static int
525nfs4_async_handle_exception(struct rpc_task *task, struct nfs_server *server,
526 int errorcode, struct nfs4_exception *exception)
527{
528 struct nfs_client *clp = server->nfs_client;
529 int ret;
530
531 ret = nfs4_do_handle_exception(server, errorcode, exception);
532 if (exception->delay) {
533 rpc_delay(task, nfs4_update_delay(&exception->timeout));
534 goto out_retry;
535 }
536 if (exception->recovering) {
537 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
538 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
539 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
540 goto out_retry;
541 }
519ae255 542 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
037fc980
TM		 543 ret = -EIO;
544 return ret;
545out_retry:
a2c0b9e2
TM		 546 if (ret == 0)
547 exception->retry = 1;
548 return ret;
65de872e
TM		 549}
550
037fc980
TM		 551static int
552nfs4_async_handle_error(struct rpc_task *task, struct nfs_server *server,
553 struct nfs4_state *state, long *timeout)
554{
555 struct nfs4_exception exception = {
556 .state = state,
557 };
558
559 if (task->tk_status >= 0)
560 return 0;
561 if (timeout)
562 exception.timeout = *timeout;
563 task->tk_status = nfs4_async_handle_exception(task, server,
564 task->tk_status,
565 &exception);
566 if (exception.delay && timeout)
567 *timeout = exception.timeout;
568 if (exception.retry)
569 return -EAGAIN;
570 return 0;
571}
572
a5250def
WAA		 573/*
574 * Return 'true' if 'clp' is using an rpc_client that is integrity protected
575 * or 'false' otherwise.
576 */
577static bool _nfs4_is_integrity_protected(struct nfs_client *clp)
578{
579 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor;
eeea5361 580 return (flavor == RPC_AUTH_GSS_KRB5I) || (flavor == RPC_AUTH_GSS_KRB5P);
a5250def 581}
65de872e 582
452e9352 583static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 584{
1da177e4
LT		 585 spin_lock(&clp->cl_lock);
586 if (time_before(clp->cl_last_renewal,timestamp))
587 clp->cl_last_renewal = timestamp;
588 spin_unlock(&clp->cl_lock);
589}
590
452e9352
TM		 591static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
592{
be824167
TM		 593 struct nfs_client *clp = server->nfs_client;
594
595 if (!nfs4_has_session(clp))
596 do_renew_lease(clp, timestamp);
452e9352
TM		 597}
598
2a3eb2b9
CL		 599struct nfs4_call_sync_data {
600 const struct nfs_server *seq_server;
601 struct nfs4_sequence_args *seq_args;
602 struct nfs4_sequence_res *seq_res;
603};
604
be3a5d23
TM		 605void nfs4_init_sequence(struct nfs4_sequence_args *args,
606 struct nfs4_sequence_res *res, int cache_reply)
a9c92d6b
CL		 607{
608 args->sa_slot = NULL;
609 args->sa_cache_this = cache_reply;
610 args->sa_privileged = 0;
611
612 res->sr_slot = NULL;
613}
614
615static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
616{
617 args->sa_privileged = 1;
618}
619
2e80dbe7 620static void nfs40_sequence_free_slot(struct nfs4_sequence_res *res)
3bd2384a
CL		 621{
622 struct nfs4_slot *slot = res->sr_slot;
623 struct nfs4_slot_table *tbl;
624
3bd2384a
CL		 625 tbl = slot->table;
626 spin_lock(&tbl->slot_tbl_lock);
627 if (!nfs41_wake_and_assign_slot(tbl, slot))
628 nfs4_free_slot(tbl, slot);
629 spin_unlock(&tbl->slot_tbl_lock);
630
631 res->sr_slot = NULL;
2e80dbe7
TM		 632}
633
634static int nfs40_sequence_done(struct rpc_task *task,
635 struct nfs4_sequence_res *res)
636{
637 if (res->sr_slot != NULL)
638 nfs40_sequence_free_slot(res);
3bd2384a
CL		 639 return 1;
640}
641
cccef3b9
AA		 642#if defined(CONFIG_NFS_V4_1)
643
d185a334 644static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871 645{
e3725ec0 646 struct nfs4_session *session;
13615871 647 struct nfs4_slot_table *tbl;
a13ce7c6 648 struct nfs4_slot *slot = res->sr_slot;
c10e4498 649 bool send_new_highest_used_slotid = false;
13615871 650
a13ce7c6 651 tbl = slot->table;
e3725ec0 652 session = tbl->session;
ea028ac9 653
07e8dcbd
TM		 654 /* Bump the slot sequence number */
655 if (slot->seq_done)
656 slot->seq_nr++;
657 slot->seq_done = 0;
658
35dc1d74 659 spin_lock(&tbl->slot_tbl_lock);
c10e4498
TM		 660 /* Be nice to the server: try to ensure that the last transmitted
661 * value for highest_user_slotid <= target_highest_slotid
662 */
663 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
664 send_new_highest_used_slotid = true;
665
a13ce7c6 666 if (nfs41_wake_and_assign_slot(tbl, slot)) {
b75ad4cd
TM		 667 send_new_highest_used_slotid = false;
668 goto out_unlock;
669 }
a13ce7c6 670 nfs4_free_slot(tbl, slot);
c10e4498
TM		 671
672 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
673 send_new_highest_used_slotid = false;
b75ad4cd 674out_unlock:
35dc1d74 675 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 676 res->sr_slot = NULL;
c10e4498 677 if (send_new_highest_used_slotid)
3f10a6af 678 nfs41_notify_server(session->clp);
045d2a6d
TM		 679 if (waitqueue_active(&tbl->slot_waitq))
680 wake_up_all(&tbl->slot_waitq);
13615871
AA		 681}
682
2e80dbe7
TM		 683static int nfs41_sequence_process(struct rpc_task *task,
684 struct nfs4_sequence_res *res)
b0df806c 685{
e3725ec0 686 struct nfs4_session *session;
a13ce7c6 687 struct nfs4_slot *slot = res->sr_slot;
14516c3a 688 struct nfs_client *clp;
ac20d163 689 bool interrupted = false;
85563073 690 int ret = 1;
b0df806c 691
a13ce7c6
TM		 692 if (slot == NULL)
693 goto out_noaction;
468f8613
BS		 694 /* don't increment the sequence number if the task wasn't sent */
695 if (!RPC_WAS_SENT(task))
b0df806c
AA		 696 goto out;
697
e3725ec0 698 session = slot->table->session;
933602e3 699
ac20d163
TM		 700 if (slot->interrupted) {
701 slot->interrupted = 0;
702 interrupted = true;
703 }
704
2f92ae34 705 trace_nfs4_sequence_done(session, res);
691daf3b 706 /* Check the SEQUENCE operation status */
14516c3a
TM		 707 switch (res->sr_status) {
708 case 0:
a865880e
OK		 709 /* If previous op on slot was interrupted and we reused
710 * the seq# and got a reply from the cache, then retry
711 */
712 if (task->tk_status == -EREMOTEIO && interrupted) {
713 ++slot->seq_nr;
714 goto retry_nowait;
715 }
b0df806c 716 /* Update the slot's sequence and clientid lease timer */
07e8dcbd 717 slot->seq_done = 1;
e3725ec0 718 clp = session->clp;
8e63b6a8 719 do_renew_lease(clp, res->sr_timestamp);
0629e370 720 /* Check sequence flags */
0a014a44
TM		 721 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags,
722 !!slot->privileged);
464ee9f9 723 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a 724 break;
ac20d163
TM		 725 case 1:
726 /*
727 * sr_status remains 1 if an RPC level error occurred.
728 * The server may or may not have processed the sequence
729 * operation..
730 * Mark the slot as having hosted an interrupted RPC call.
731 */
732 slot->interrupted = 1;
733 goto out;
14516c3a
TM		 734 case -NFS4ERR_DELAY:
735 /* The server detected a resend of the RPC call and
736 * returned NFS4ERR_DELAY as per Section 2.10.6.2
737 * of RFC5661.
738 */
df2fabff 739 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 740 __func__,
df2fabff 741 slot->slot_nr,
933602e3 742 slot->seq_nr);
14516c3a 743 goto out_retry;
85563073
TM		 744 case -NFS4ERR_BADSLOT:
745 /*
746 * The slot id we used was probably retired. Try again
747 * using a different slot id.
748 */
e8794440
TM		 749 goto retry_nowait;
750 case -NFS4ERR_SEQ_MISORDERED:
ac20d163
TM		 751 /*
752 * Was the last operation on this sequence interrupted?
753 * If so, retry after bumping the sequence number.
754 */
755 if (interrupted) {
756 ++slot->seq_nr;
757 goto retry_nowait;
758 }
e8794440
TM		 759 /*
760 * Could this slot have been previously retired?
761 * If so, then the server may be expecting seq_nr = 1!
762 */
8e63b6a8
TM		 763 if (slot->seq_nr != 1) {
764 slot->seq_nr = 1;
765 goto retry_nowait;
766 }
767 break;
e8794440
TM		 768 case -NFS4ERR_SEQ_FALSE_RETRY:
769 ++slot->seq_nr;
770 goto retry_nowait;
2cf10cdd
TM		 771 case -NFS4ERR_DEADSESSION:
772 case -NFS4ERR_BADSESSION:
773 nfs4_schedule_session_recovery(session, res->sr_status);
774 goto retry_nowait;
14516c3a
TM		 775 default:
776 /* Just update the slot sequence no. */
07e8dcbd 777 slot->seq_done = 1;
b0df806c
AA		 778 }
779out:
780 /* The session may be reset by one of the error handlers. */
781 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
a13ce7c6 782out_noaction:
85563073 783 return ret;
e8794440
TM		 784retry_nowait:
785 if (rpc_restart_call_prepare(task)) {
2e80dbe7 786 nfs41_sequence_free_slot(res);
e8794440
TM		 787 task->tk_status = 0;
788 ret = 0;
789 }
790 goto out;
14516c3a 791out_retry:
d05dd4e9 792 if (!rpc_restart_call(task))
14516c3a
TM		 793 goto out;
794 rpc_delay(task, NFS4_POLL_RETRY_MAX);
795 return 0;
b0df806c 796}
2e80dbe7
TM		 797
798int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
799{
800 if (!nfs41_sequence_process(task, res))
801 return 0;
802 if (res->sr_slot != NULL)
803 nfs41_sequence_free_slot(res);
804 return 1;
805
806}
f9c96fcc 807EXPORT_SYMBOL_GPL(nfs41_sequence_done);
b0df806c 808
2e80dbe7
TM		 809static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res)
810{
811 if (res->sr_slot == NULL)
812 return 1;
813 if (res->sr_slot->table->session != NULL)
814 return nfs41_sequence_process(task, res);
815 return nfs40_sequence_done(task, res);
816}
817
818static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res)
819{
820 if (res->sr_slot != NULL) {
821 if (res->sr_slot->table->session != NULL)
822 nfs41_sequence_free_slot(res);
823 else
824 nfs40_sequence_free_slot(res);
825 }
826}
827
2c4b131d 828int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
df896455 829{
e3725ec0 830 if (res->sr_slot == NULL)
14516c3a 831 return 1;
3bd2384a
CL		 832 if (!res->sr_slot->table->session)
833 return nfs40_sequence_done(task, res);
14516c3a 834 return nfs41_sequence_done(task, res);
df896455 835}
2c4b131d 836EXPORT_SYMBOL_GPL(nfs4_sequence_done);
df896455 837
ce5039c1
AA		 838static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
839{
2a3eb2b9 840 struct nfs4_call_sync_data *data = calldata;
ce5039c1 841
035168ab
TM		 842 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
843
7981c8a6
AS		 844 nfs4_setup_sequence(data->seq_server->nfs_client,
845 data->seq_args, data->seq_res, task);
ce5039c1
AA		 846}
847
69ab40c4
AA		 848static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
849{
2a3eb2b9 850 struct nfs4_call_sync_data *data = calldata;
69ab40c4 851
14516c3a 852 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 853}
854
17280175 855static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 856 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 857 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 858};
859
3bd2384a
CL		 860#else /* !CONFIG_NFS_V4_1 */
861
2e80dbe7
TM		 862static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res)
863{
864 return nfs40_sequence_done(task, res);
865}
866
867static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res)
868{
869 if (res->sr_slot != NULL)
870 nfs40_sequence_free_slot(res);
871}
872
2c4b131d
PT		 873int nfs4_sequence_done(struct rpc_task *task,
874 struct nfs4_sequence_res *res)
9915ea7e 875{
3bd2384a 876 return nfs40_sequence_done(task, res);
9915ea7e 877}
2c4b131d 878EXPORT_SYMBOL_GPL(nfs4_sequence_done);
3bd2384a
CL		 879
880#endif /* !CONFIG_NFS_V4_1 */
9915ea7e 881
7981c8a6
AS		 882int nfs4_setup_sequence(const struct nfs_client *client,
883 struct nfs4_sequence_args *args,
884 struct nfs4_sequence_res *res,
885 struct rpc_task *task)
886{
7981c8a6 887 struct nfs4_session *session = nfs4_get_session(client);
76ee0354 888 struct nfs4_slot_table *tbl = client->cl_slot_tbl;
3d35808b 889 struct nfs4_slot *slot;
7981c8a6 890
9dd9107f
AS		 891 /* slot already allocated? */
892 if (res->sr_slot != NULL)
893 goto out_start;
894
76ee0354
AS		 895 if (session) {
896 tbl = &session->fc_slot_table;
897 task->tk_timeout = 0;
898 }
899
6994cdd7 900 spin_lock(&tbl->slot_tbl_lock);
76ee0354
AS		 901 /* The state manager will wait until the slot table is empty */
902 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
903 goto out_sleep;
6994cdd7 904
3d35808b
AS		 905 slot = nfs4_alloc_slot(tbl);
906 if (IS_ERR(slot)) {
907 /* Try again in 1/4 second */
908 if (slot == ERR_PTR(-ENOMEM))
909 task->tk_timeout = HZ >> 2;
0dcee8bb 910 goto out_sleep;
3d35808b 911 }
6994cdd7 912 spin_unlock(&tbl->slot_tbl_lock);
7981c8a6 913
3d35808b
AS		 914 slot->privileged = args->sa_privileged ? 1 : 0;
915 args->sa_slot = slot;
916
917 res->sr_slot = slot;
918 if (session) {
919 res->sr_timestamp = jiffies;
920 res->sr_status_flags = 0;
921 res->sr_status = 1;
3d35808b
AS		 922 }
923
ad05cc0f 924 trace_nfs4_setup_sequence(session, args);
9dd9107f
AS		 925out_start:
926 rpc_call_start(task);
927 return 0;
0dcee8bb
AS		 928
929out_sleep:
930 if (args->sa_privileged)
931 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
932 NULL, RPC_PRIORITY_PRIVILEGED);
933 else
934 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
935 spin_unlock(&tbl->slot_tbl_lock);
936 return -EAGAIN;
7981c8a6
AS		 937}
938EXPORT_SYMBOL_GPL(nfs4_setup_sequence);
939
9915ea7e
CL		 940static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
941{
942 struct nfs4_call_sync_data *data = calldata;
42e1cca7 943 nfs4_setup_sequence(data->seq_server->nfs_client,
9915ea7e
CL		 944 data->seq_args, data->seq_res, task);
945}
946
947static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
948{
949 struct nfs4_call_sync_data *data = calldata;
950 nfs4_sequence_done(task, data->seq_res);
951}
952
953static const struct rpc_call_ops nfs40_call_sync_ops = {
954 .rpc_call_prepare = nfs40_call_sync_prepare,
955 .rpc_call_done = nfs40_call_sync_done,
956};
957
7c513058
BS		 958static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
959 struct nfs_server *server,
ce5039c1
AA		 960 struct rpc_message *msg,
961 struct nfs4_sequence_args *args,
8fe72bac 962 struct nfs4_sequence_res *res)
ce5039c1
AA		 963{
964 int ret;
965 struct rpc_task *task;
9915ea7e 966 struct nfs_client *clp = server->nfs_client;
2a3eb2b9 967 struct nfs4_call_sync_data data = {
035168ab 968 .seq_server = server,
ce5039c1
AA		 969 .seq_args = args,
970 .seq_res = res,
ce5039c1
AA		 971 };
972 struct rpc_task_setup task_setup = {
7c513058 973 .rpc_client = clnt,
ce5039c1 974 .rpc_message = msg,
9915ea7e 975 .callback_ops = clp->cl_mvops->call_sync_ops,
ce5039c1
AA		 976 .callback_data = &data
977 };
978
ce5039c1
AA		 979 task = rpc_run_task(&task_setup);
980 if (IS_ERR(task))
981 ret = PTR_ERR(task);
982 else {
983 ret = task->tk_status;
984 rpc_put_task(task);
985 }
986 return ret;
987}
988
7c513058
BS		 989int nfs4_call_sync(struct rpc_clnt *clnt,
990 struct nfs_server *server,
e73b83f2
BS		 991 struct rpc_message *msg,
992 struct nfs4_sequence_args *args,
993 struct nfs4_sequence_res *res,
994 int cache_reply)
995{
a9c92d6b 996 nfs4_init_sequence(args, res, cache_reply);
9915ea7e 997 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
e73b83f2 998}
cccef3b9 999
d3129ef6
TM		 1000static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo,
1001 unsigned long timestamp)
1da177e4 1002{
38478b24 1003 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 1004
38478b24 1005 spin_lock(&dir->i_lock);
359d7d1c 1006 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
e603a4c1
TM		 1007 if (cinfo->atomic && cinfo->before == dir->i_version) {
1008 nfsi->cache_validity &= ~NFS_INO_REVAL_PAGECACHE;
1009 nfsi->attrtimeo_timestamp = jiffies;
1010 } else {
bfc69a45 1011 nfs_force_lookup_revalidate(dir);
e603a4c1
TM		 1012 if (cinfo->before != dir->i_version)
1013 nfsi->cache_validity |= NFS_INO_INVALID_ACCESS |
1014 NFS_INO_INVALID_ACL;
1015 }
a9a4a87a 1016 dir->i_version = cinfo->after;
d3129ef6 1017 nfsi->read_cache_jiffies = timestamp;
3235b403 1018 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
de242c0b 1019 nfs_fscache_invalidate(dir);
38478b24 1020 spin_unlock(&dir->i_lock);
1da177e4
LT		 1021}
1022
e56e0b78 1023struct nfs4_opendata {
c6d00e63 1024 struct kref kref;
e56e0b78
TM		 1025 struct nfs_openargs o_arg;
1026 struct nfs_openres o_res;
cdd4e68b
TM		 1027 struct nfs_open_confirmargs c_arg;
1028 struct nfs_open_confirmres c_res;
6926afd1
TM		 1029 struct nfs4_string owner_name;
1030 struct nfs4_string group_name;
a49c2691 1031 struct nfs4_label *a_label;
e56e0b78 1032 struct nfs_fattr f_attr;
1775fd3e 1033 struct nfs4_label *f_label;
e56e0b78 1034 struct dentry *dir;
82a2c1b7 1035 struct dentry *dentry;
e56e0b78 1036 struct nfs4_state_owner *owner;
aac00a8d 1037 struct nfs4_state *state;
e56e0b78 1038 struct iattr attrs;
26e976a8 1039 unsigned long timestamp;
3e309914 1040 unsigned int rpc_done : 1;
5bc2afc2 1041 unsigned int file_created : 1;
bdeca1b7 1042 unsigned int is_recover : 1;
24ac23ab
TM		 1043 int rpc_status;
1044 int cancelled;
e56e0b78
TM		 1045};
1046
49f9a0fa
TM		 1047static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
1048 int err, struct nfs4_exception *exception)
1049{
1050 if (err != -EINVAL)
1051 return false;
1052 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1053 return false;
1054 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
1055 exception->retry = 1;
1056 return true;
1057}
1058
6ae37339
TM		 1059static u32
1060nfs4_map_atomic_open_share(struct nfs_server *server,
1061 fmode_t fmode, int openflags)
1062{
1063 u32 res = 0;
1064
1065 switch (fmode & (FMODE_READ | FMODE_WRITE)) {
1066 case FMODE_READ:
1067 res = NFS4_SHARE_ACCESS_READ;
1068 break;
1069 case FMODE_WRITE:
1070 res = NFS4_SHARE_ACCESS_WRITE;
1071 break;
1072 case FMODE_READ|FMODE_WRITE:
1073 res = NFS4_SHARE_ACCESS_BOTH;
1074 }
1075 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1076 goto out;
1077 /* Want no delegation if we're using O_DIRECT */
1078 if (openflags & O_DIRECT)
1079 res |= NFS4_SHARE_WANT_NO_DELEG;
1080out:
1081 return res;
1082}
1083
49f9a0fa
TM		 1084static enum open_claim_type4
1085nfs4_map_atomic_open_claim(struct nfs_server *server,
1086 enum open_claim_type4 claim)
1087{
1088 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
1089 return claim;
1090 switch (claim) {
1091 default:
1092 return claim;
1093 case NFS4_OPEN_CLAIM_FH:
1094 return NFS4_OPEN_CLAIM_NULL;
1095 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1096 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
1097 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1098 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
1099 }
1100}
2ced46c2
TM		 1101
1102static void nfs4_init_opendata_res(struct nfs4_opendata *p)
1103{
1104 p->o_res.f_attr = &p->f_attr;
1775fd3e 1105 p->o_res.f_label = p->f_label;
c1d51931
TM		 1106 p->o_res.seqid = p->o_arg.seqid;
1107 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 1108 p->o_res.server = p->o_arg.server;
5f657530 1109 p->o_res.access_request = p->o_arg.access;
2ced46c2 1110 nfs_fattr_init(&p->f_attr);
6926afd1 1111 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 1112}
1113
82a2c1b7 1114static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 1115 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be 1116 const struct iattr *attrs,
1775fd3e 1117 struct nfs4_label *label,
4a1c0893 1118 enum open_claim_type4 claim,
8535b2be 1119 gfp_t gfp_mask)
e56e0b78 1120{
82a2c1b7 1121 struct dentry *parent = dget_parent(dentry);
2b0143b5 1122 struct inode *dir = d_inode(parent);
e56e0b78 1123 struct nfs_server *server = NFS_SERVER(dir);
63f5f796 1124 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
e56e0b78
TM		 1125 struct nfs4_opendata *p;
1126
8535b2be 1127 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 1128 if (p == NULL)
1129 goto err;
14c43f76
DQ		 1130
1131 p->f_label = nfs4_label_alloc(server, gfp_mask);
1132 if (IS_ERR(p->f_label))
1133 goto err_free_p;
1134
a49c2691
KM		 1135 p->a_label = nfs4_label_alloc(server, gfp_mask);
1136 if (IS_ERR(p->a_label))
1137 goto err_free_f;
1138
63f5f796
TM		 1139 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
1140 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask);
badc76dd 1141 if (IS_ERR(p->o_arg.seqid))
14c43f76 1142 goto err_free_label;
82a2c1b7
AV		 1143 nfs_sb_active(dentry->d_sb);
1144 p->dentry = dget(dentry);
e56e0b78
TM		 1145 p->dir = parent;
1146 p->owner = sp;
1147 atomic_inc(&sp->so_count);
dc0b027d
TM		 1148 p->o_arg.open_flags = flags;
1149 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
dff25ddb 1150 p->o_arg.umask = current_umask();
536585cc 1151 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
6ae37339
TM		 1152 p->o_arg.share_access = nfs4_map_atomic_open_share(server,
1153 fmode, flags);
ae2bb032
WAA		 1154 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
1155 * will return permission denied for all bits until close */
1156 if (!(flags & O_EXCL)) {
1157 /* ask server to check for all possible rights as results
1158 * are cached */
536585cc
TM		 1159 switch (p->o_arg.claim) {
1160 default:
1161 break;
1162 case NFS4_OPEN_CLAIM_NULL:
1163 case NFS4_OPEN_CLAIM_FH:
1164 p->o_arg.access = NFS4_ACCESS_READ |
1165 NFS4_ACCESS_MODIFY |
1166 NFS4_ACCESS_EXTEND |
1167 NFS4_ACCESS_EXECUTE;
1168 }
ae2bb032 1169 }
7539bbab 1170 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 1171 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1172 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 1173 p->o_arg.name = &dentry->d_name;
e56e0b78 1174 p->o_arg.server = server;
aa9c2669 1175 p->o_arg.bitmask = nfs4_bitmask(server, label);
1549210f 1176 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
a49c2691 1177 p->o_arg.label = nfs4_label_copy(p->a_label, label);
49f9a0fa 1178 switch (p->o_arg.claim) {
4a1c0893
TM		 1179 case NFS4_OPEN_CLAIM_NULL:
1180 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1181 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1182 p->o_arg.fh = NFS_FH(dir);
1183 break;
1184 case NFS4_OPEN_CLAIM_PREVIOUS:
1185 case NFS4_OPEN_CLAIM_FH:
1186 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1187 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
2b0143b5 1188 p->o_arg.fh = NFS_FH(d_inode(dentry));
4a1c0893 1189 }
536e43d1 1190 if (attrs != NULL && attrs->ia_valid != 0) {
c281fa9c 1191 __u32 verf[2];
d77d76ff 1192
e56e0b78
TM		 1193 p->o_arg.u.attrs = &p->attrs;
1194 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 1195
1196 verf[0] = jiffies;
1197 verf[1] = current->pid;
1198 memcpy(p->o_arg.u.verifier.data, verf,
1199 sizeof(p->o_arg.u.verifier.data));
e56e0b78 1200 }
cdd4e68b
TM		 1201 p->c_arg.fh = &p->o_res.fh;
1202 p->c_arg.stateid = &p->o_res.stateid;
1203 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 1204 nfs4_init_opendata_res(p);
c6d00e63 1205 kref_init(&p->kref);
e56e0b78 1206 return p;
14c43f76
DQ		 1207
1208err_free_label:
a49c2691
KM		 1209 nfs4_label_free(p->a_label);
1210err_free_f:
14c43f76
DQ		 1211 nfs4_label_free(p->f_label);
1212err_free_p:
e56e0b78
TM		 1213 kfree(p);
1214err:
1215 dput(parent);
1216 return NULL;
1217}
1218
c6d00e63 1219static void nfs4_opendata_free(struct kref *kref)
e56e0b78 1220{
c6d00e63
TM		 1221 struct nfs4_opendata *p = container_of(kref,
1222 struct nfs4_opendata, kref);
82a2c1b7 1223 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 1224
1225 nfs_free_seqid(p->o_arg.seqid);
2e80dbe7 1226 nfs4_sequence_free_slot(&p->o_res.seq_res);
aac00a8d
TM		 1227 if (p->state != NULL)
1228 nfs4_put_open_state(p->state);
c6d00e63 1229 nfs4_put_state_owner(p->owner);
14c43f76 1230
a49c2691 1231 nfs4_label_free(p->a_label);
14c43f76
DQ		 1232 nfs4_label_free(p->f_label);
1233
c6d00e63 1234 dput(p->dir);
82a2c1b7
AV		 1235 dput(p->dentry);
1236 nfs_sb_deactive(sb);
6926afd1 1237 nfs_fattr_free_names(&p->f_attr);
e911b815 1238 kfree(p->f_attr.mdsthreshold);
c6d00e63
TM		 1239 kfree(p);
1240}
1241
1242static void nfs4_opendata_put(struct nfs4_opendata *p)
1243{
1244 if (p != NULL)
1245 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 1246}
1247
24311f88
TM		 1248static bool nfs4_mode_match_open_stateid(struct nfs4_state *state,
1249 fmode_t fmode)
1250{
1251 switch(fmode & (FMODE_READ|FMODE_WRITE)) {
1252 case FMODE_READ|FMODE_WRITE:
1253 return state->n_rdwr != 0;
1254 case FMODE_WRITE:
1255 return state->n_wronly != 0;
1256 case FMODE_READ:
1257 return state->n_rdonly != 0;
1258 }
1259 WARN_ON_ONCE(1);
1260 return false;
1261}
1262
dc0b027d 1263static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 1264{
1265 int ret = 0;
dc0b027d 1266
536e43d1 1267 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 1268 goto out;
1269 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 1270 case FMODE_READ:
88069f77
TM		 1271 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1272 && state->n_rdonly != 0;
6ee41268
TM		 1273 break;
1274 case FMODE_WRITE:
88069f77
TM		 1275 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1276 && state->n_wronly != 0;
6ee41268
TM		 1277 break;
1278 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 1279 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1280 && state->n_rdwr != 0;
6ee41268 1281 }
dc0b027d 1282out:
6ee41268
TM		 1283 return ret;
1284}
1285
2a606188
TM		 1286static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode,
1287 enum open_claim_type4 claim)
aac00a8d 1288{
652f89f6
TM		 1289 if (delegation == NULL)
1290 return 0;
dc0b027d 1291 if ((delegation->type & fmode) != fmode)
aac00a8d 1292 return 0;
d25be546
TM		 1293 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1294 return 0;
2a606188
TM		 1295 switch (claim) {
1296 case NFS4_OPEN_CLAIM_NULL:
1297 case NFS4_OPEN_CLAIM_FH:
1298 break;
1299 case NFS4_OPEN_CLAIM_PREVIOUS:
1300 if (!test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
1301 break;
1302 default:
1303 return 0;
1304 }
b7391f44 1305 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 1306 return 1;
1307}
1308
dc0b027d 1309static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 1310{
dc0b027d 1311 switch (fmode) {
e7616923
TM		 1312 case FMODE_WRITE:
1313 state->n_wronly++;
1314 break;
1315 case FMODE_READ:
1316 state->n_rdonly++;
1317 break;
1318 case FMODE_READ|FMODE_WRITE:
1319 state->n_rdwr++;
1320 }
dc0b027d 1321 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 1322}
1323
8a64c4ef
TM		 1324#ifdef CONFIG_NFS_V4_1
1325static bool nfs_open_stateid_recover_openmode(struct nfs4_state *state)
1326{
1327 if (state->n_rdonly && !test_bit(NFS_O_RDONLY_STATE, &state->flags))
1328 return true;
1329 if (state->n_wronly && !test_bit(NFS_O_WRONLY_STATE, &state->flags))
1330 return true;
1331 if (state->n_rdwr && !test_bit(NFS_O_RDWR_STATE, &state->flags))
1332 return true;
1333 return false;
1334}
1335#endif /* CONFIG_NFS_V4_1 */
1336
4f14c194
TM		 1337static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
1338{
1339 struct nfs_client *clp = state->owner->so_server->nfs_client;
1340 bool need_recover = false;
1341
1342 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly)
1343 need_recover = true;
1344 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly)
1345 need_recover = true;
1346 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr)
1347 need_recover = true;
1348 if (need_recover)
1349 nfs4_state_mark_reclaim_nograce(clp, state);
1350}
1351
e999e80e 1352static bool nfs_need_update_open_stateid(struct nfs4_state *state,
1393d961 1353 const nfs4_stateid *stateid, nfs4_stateid *freeme)
e999e80e
TM		 1354{
1355 if (test_and_set_bit(NFS_OPEN_STATE, &state->flags) == 0)
1356 return true;
4f14c194 1357 if (!nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1393d961 1358 nfs4_stateid_copy(freeme, &state->open_stateid);
4f14c194 1359 nfs_test_and_clear_all_open_stateid(state);
e999e80e 1360 return true;
4f14c194 1361 }
e999e80e
TM		 1362 if (nfs4_stateid_is_newer(stateid, &state->open_stateid))
1363 return true;
1364 return false;
1365}
1366
f95549cf
TM		 1367static void nfs_resync_open_stateid_locked(struct nfs4_state *state)
1368{
3c38cbe2
TM		 1369 if (!(state->n_wronly || state->n_rdonly || state->n_rdwr))
1370 return;
f95549cf
TM		 1371 if (state->n_wronly)
1372 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1373 if (state->n_rdonly)
1374 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1375 if (state->n_rdwr)
1376 set_bit(NFS_O_RDWR_STATE, &state->flags);
3c38cbe2 1377 set_bit(NFS_OPEN_STATE, &state->flags);
f95549cf
TM		 1378}
1379
226056c5
TM		 1380static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
1381 nfs4_stateid *stateid, fmode_t fmode)
003707c7 1382{
226056c5
TM		 1383 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1384 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1385 case FMODE_WRITE:
1386 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1387 break;
1388 case FMODE_READ:
1389 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1390 break;
1391 case 0:
1392 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1393 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1394 clear_bit(NFS_OPEN_STATE, &state->flags);
1395 }
1396 if (stateid == NULL)
1397 return;
3e7dfb16
TM		 1398 /* Handle OPEN+OPEN_DOWNGRADE races */
1399 if (nfs4_stateid_match_other(stateid, &state->open_stateid) &&
1400 !nfs4_stateid_is_newer(stateid, &state->open_stateid)) {
f95549cf 1401 nfs_resync_open_stateid_locked(state);
226056c5 1402 return;
f95549cf 1403 }
003707c7 1404 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 1405 nfs4_stateid_copy(&state->stateid, stateid);
1406 nfs4_stateid_copy(&state->open_stateid, stateid);
226056c5
TM		 1407}
1408
4a1e2feb
TM		 1409static void nfs_clear_open_stateid(struct nfs4_state *state,
1410 nfs4_stateid *arg_stateid,
1411 nfs4_stateid *stateid, fmode_t fmode)
226056c5
TM		 1412{
1413 write_seqlock(&state->seqlock);
3e7dfb16
TM		 1414 /* Ignore, if the CLOSE argment doesn't match the current stateid */
1415 if (nfs4_state_match_open_stateid_other(state, arg_stateid))
1416 nfs_clear_open_stateid_locked(state, stateid, fmode);
226056c5 1417 write_sequnlock(&state->seqlock);
4f14c194
TM		 1418 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1419 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
226056c5
TM		 1420}
1421
1393d961
TM		 1422static void nfs_set_open_stateid_locked(struct nfs4_state *state,
1423 const nfs4_stateid *stateid, fmode_t fmode,
1424 nfs4_stateid *freeme)
003707c7 1425{
dc0b027d 1426 switch (fmode) {
003707c7
TM		 1427 case FMODE_READ:
1428 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1429 break;
1430 case FMODE_WRITE:
1431 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1432 break;
1433 case FMODE_READ|FMODE_WRITE:
1434 set_bit(NFS_O_RDWR_STATE, &state->flags);
1435 }
1393d961 1436 if (!nfs_need_update_open_stateid(state, stateid, freeme))
e999e80e
TM		 1437 return;
1438 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1439 nfs4_stateid_copy(&state->stateid, stateid);
1440 nfs4_stateid_copy(&state->open_stateid, stateid);
003707c7
TM		 1441}
1442
1393d961
TM		 1443static void __update_open_stateid(struct nfs4_state *state,
1444 const nfs4_stateid *open_stateid,
1445 const nfs4_stateid *deleg_stateid,
1446 fmode_t fmode,
1447 nfs4_stateid *freeme)
1da177e4 1448{
8bda4e4c
TM		 1449 /*
1450 * Protect the call to nfs4_state_set_mode_locked and
1451 * serialise the stateid update
1452 */
361cad3c 1453 spin_lock(&state->owner->so_lock);
8bda4e4c 1454 write_seqlock(&state->seqlock);
003707c7 1455 if (deleg_stateid != NULL) {
f597c537 1456 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1457 set_bit(NFS_DELEGATED_STATE, &state->flags);
1458 }
1459 if (open_stateid != NULL)
1393d961 1460 nfs_set_open_stateid_locked(state, open_stateid, fmode, freeme);
8bda4e4c 1461 write_sequnlock(&state->seqlock);
dc0b027d 1462 update_open_stateflags(state, fmode);
ec073428 1463 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1464}
1465
1393d961
TM		 1466static int update_open_stateid(struct nfs4_state *state,
1467 const nfs4_stateid *open_stateid,
1468 const nfs4_stateid *delegation,
1469 fmode_t fmode)
34310430 1470{
1393d961
TM		 1471 struct nfs_server *server = NFS_SERVER(state->inode);
1472 struct nfs_client *clp = server->nfs_client;
34310430
TM		 1473 struct nfs_inode *nfsi = NFS_I(state->inode);
1474 struct nfs_delegation *deleg_cur;
83aa3e0f 1475 nfs4_stateid freeme = { };
34310430
TM		 1476 int ret = 0;
1477
dc0b027d 1478 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1479
1480 rcu_read_lock();
1481 deleg_cur = rcu_dereference(nfsi->delegation);
1482 if (deleg_cur == NULL)
1483 goto no_delegation;
1484
1485 spin_lock(&deleg_cur->lock);
17f26b12 1486 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
d25be546 1487 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1488 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1489 goto no_delegation_unlock;
1490
1491 if (delegation == NULL)
1492 delegation = &deleg_cur->stateid;
f597c537 1493 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1494 goto no_delegation_unlock;
1495
b7391f44 1496 nfs_mark_delegation_referenced(deleg_cur);
1393d961
TM		 1497 __update_open_stateid(state, open_stateid, &deleg_cur->stateid,
1498 fmode, &freeme);
34310430
TM		 1499 ret = 1;
1500no_delegation_unlock:
1501 spin_unlock(&deleg_cur->lock);
1502no_delegation:
1503 rcu_read_unlock();
1504
1505 if (!ret && open_stateid != NULL) {
1393d961 1506 __update_open_stateid(state, open_stateid, NULL, fmode, &freeme);
34310430
TM		 1507 ret = 1;
1508 }
4f14c194 1509 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1393d961
TM		 1510 nfs4_schedule_state_manager(clp);
1511 if (freeme.type != 0)
1512 nfs4_test_and_free_stateid(server, &freeme,
1513 state->owner->so_cred);
34310430
TM		 1514
1515 return ret;
1516}
1517
39071e6f
TM		 1518static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp,
1519 const nfs4_stateid *stateid)
1520{
1521 struct nfs4_state *state = lsp->ls_state;
1522 bool ret = false;
1523
1524 spin_lock(&state->state_lock);
1525 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid))
1526 goto out_noupdate;
1527 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid))
1528 goto out_noupdate;
1529 nfs4_stateid_copy(&lsp->ls_stateid, stateid);
1530 ret = true;
1531out_noupdate:
1532 spin_unlock(&state->state_lock);
1533 return ret;
1534}
34310430 1535
dc0b027d 1536static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1537{
1538 struct nfs_delegation *delegation;
1539
1540 rcu_read_lock();
1541 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1542 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1543 rcu_read_unlock();
1544 return;
1545 }
1546 rcu_read_unlock();
57ec14c5 1547 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1548}
1549
6ee41268 1550static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1551{
1552 struct nfs4_state *state = opendata->state;
1553 struct nfs_inode *nfsi = NFS_I(state->inode);
1554 struct nfs_delegation *delegation;
f448badd 1555 int open_mode = opendata->o_arg.open_flags;
dc0b027d 1556 fmode_t fmode = opendata->o_arg.fmode;
2a606188 1557 enum open_claim_type4 claim = opendata->o_arg.claim;
aac00a8d
TM		 1558 nfs4_stateid stateid;
1559 int ret = -EAGAIN;
1560
aac00a8d 1561 for (;;) {
61beef75 1562 spin_lock(&state->owner->so_lock);
dc0b027d 1563 if (can_open_cached(state, fmode, open_mode)) {
61beef75 1564 update_open_stateflags(state, fmode);
6ee41268 1565 spin_unlock(&state->owner->so_lock);
61beef75 1566 goto out_return_state;
6ee41268 1567 }
61beef75 1568 spin_unlock(&state->owner->so_lock);
34310430
TM		 1569 rcu_read_lock();
1570 delegation = rcu_dereference(nfsi->delegation);
2a606188 1571 if (!can_open_delegated(delegation, fmode, claim)) {
34310430 1572 rcu_read_unlock();
aac00a8d 1573 break;
34310430 1574 }
aac00a8d 1575 /* Save the delegation */
f597c537 1576 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1577 rcu_read_unlock();
fa332941 1578 nfs_release_seqid(opendata->o_arg.seqid);
bdeca1b7
TM		 1579 if (!opendata->is_recover) {
1580 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1581 if (ret != 0)
1582 goto out;
1583 }
aac00a8d 1584 ret = -EAGAIN;
34310430
TM		 1585
1586 /* Try to update the stateid using the delegation */
dc0b027d 1587 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1588 goto out_return_state;
aac00a8d 1589 }
aac00a8d
TM		 1590out:
1591 return ERR_PTR(ret);
1592out_return_state:
1593 atomic_inc(&state->count);
1594 return state;
1595}
1596
e23008ec
AA		 1597static void
1598nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1599{
1600 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1601 struct nfs_delegation *delegation;
1602 int delegation_flags = 0;
1603
1604 rcu_read_lock();
1605 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1606 if (delegation)
1607 delegation_flags = delegation->flags;
1608 rcu_read_unlock();
72d79ff8
TM		 1609 switch (data->o_arg.claim) {
1610 default:
1611 break;
1612 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1613 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
e23008ec
AA		 1614 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1615 "returning a delegation for "
1616 "OPEN(CLAIM_DELEGATE_CUR)\n",
1617 clp->cl_hostname);
72d79ff8
TM		 1618 return;
1619 }
1620 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
e23008ec
AA		 1621 nfs_inode_set_delegation(state->inode,
1622 data->owner->so_cred,
1623 &data->o_res);
1624 else
1625 nfs_inode_reclaim_delegation(state->inode,
1626 data->owner->so_cred,
1627 &data->o_res);
1628}
1629
1630/*
1631 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1632 * and update the nfs4_state.
1633 */
1634static struct nfs4_state *
1635_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1636{
1637 struct inode *inode = data->state->inode;
1638 struct nfs4_state *state = data->state;
1639 int ret;
1640
d2bfda2e 1641 if (!data->rpc_done) {
37a8484a
AS		 1642 if (data->rpc_status)
1643 return ERR_PTR(data->rpc_status);
d2bfda2e
WAA		 1644 /* cached opens have already been processed */
1645 goto update;
e23008ec
AA		 1646 }
1647
e23008ec
AA		 1648 ret = nfs_refresh_inode(inode, &data->f_attr);
1649 if (ret)
37a8484a 1650 return ERR_PTR(ret);
e23008ec
AA		 1651
1652 if (data->o_res.delegation_type != 0)
1653 nfs4_opendata_check_deleg(data, state);
d2bfda2e 1654update:
e23008ec
AA		 1655 update_open_stateid(state, &data->o_res.stateid, NULL,
1656 data->o_arg.fmode);
d49f042a 1657 atomic_inc(&state->count);
e23008ec
AA		 1658
1659 return state;
e23008ec
AA		 1660}
1661
1662static struct nfs4_state *
1663_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1664{
1665 struct inode *inode;
1666 struct nfs4_state *state = NULL;
1b370bc2 1667 int ret;
24ac23ab 1668
aac00a8d 1669 if (!data->rpc_done) {
6ee41268 1670 state = nfs4_try_open_cached(data);
9759b0fb 1671 trace_nfs4_cached_open(data->state);
aac00a8d
TM		 1672 goto out;
1673 }
1674
1b370bc2 1675 ret = -EAGAIN;
24ac23ab 1676 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1677 goto err;
1775fd3e 1678 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1b370bc2 1679 ret = PTR_ERR(inode);
03f28e3a 1680 if (IS_ERR(inode))
1b370bc2
TM		 1681 goto err;
1682 ret = -ENOMEM;
24ac23ab
TM		 1683 state = nfs4_get_open_state(inode, data->owner);
1684 if (state == NULL)
1b370bc2 1685 goto err_put_inode;
e23008ec
AA		 1686 if (data->o_res.delegation_type != 0)
1687 nfs4_opendata_check_deleg(data, state);
34310430 1688 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1689 data->o_arg.fmode);
24ac23ab 1690 iput(inode);
aac00a8d 1691out:
7aa262b5 1692 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1693 return state;
1b370bc2
TM		 1694err_put_inode:
1695 iput(inode);
1696err:
1697 return ERR_PTR(ret);
24ac23ab
TM		 1698}
1699
e23008ec
AA		 1700static struct nfs4_state *
1701nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1702{
2e80dbe7
TM		 1703 struct nfs4_state *ret;
1704
e23008ec 1705 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
2e80dbe7
TM		 1706 ret =_nfs4_opendata_reclaim_to_nfs4_state(data);
1707 else
1708 ret = _nfs4_opendata_to_nfs4_state(data);
1709 nfs4_sequence_free_slot(&data->o_res.seq_res);
1710 return ret;
e23008ec
AA		 1711}
1712
864472e9
TM		 1713static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1714{
1715 struct nfs_inode *nfsi = NFS_I(state->inode);
1716 struct nfs_open_context *ctx;
1717
1718 spin_lock(&state->inode->i_lock);
1719 list_for_each_entry(ctx, &nfsi->open_files, list) {
1720 if (ctx->state != state)
1721 continue;
1722 get_nfs_open_context(ctx);
1723 spin_unlock(&state->inode->i_lock);
1724 return ctx;
1725 }
1726 spin_unlock(&state->inode->i_lock);
1727 return ERR_PTR(-ENOENT);
1728}
1729
4a1c0893
TM		 1730static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1731 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1732{
1733 struct nfs4_opendata *opendata;
1734
4a1c0893 1735 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1775fd3e 1736 NULL, NULL, claim, GFP_NOFS);
6f220ed5
TM		 1737 if (opendata == NULL)
1738 return ERR_PTR(-ENOMEM);
1739 opendata->state = state;
1740 atomic_inc(&state->count);
1741 return opendata;
1742}
1743
24311f88
TM		 1744static int nfs4_open_recover_helper(struct nfs4_opendata *opendata,
1745 fmode_t fmode)
864472e9 1746{
2ced46c2 1747 struct nfs4_state *newstate;
864472e9
TM		 1748 int ret;
1749
24311f88 1750 if (!nfs4_mode_match_open_stateid(opendata->state, fmode))
39f897fd 1751 return 0;
dc0b027d
TM		 1752 opendata->o_arg.open_flags = 0;
1753 opendata->o_arg.fmode = fmode;
be36e185
TM		 1754 opendata->o_arg.share_access = nfs4_map_atomic_open_share(
1755 NFS_SB(opendata->dentry->d_sb),
1756 fmode, 0);
2ced46c2
TM		 1757 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1758 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1759 nfs4_init_opendata_res(opendata);
b257957e 1760 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1761 if (ret != 0)
1762 return ret;
2ced46c2 1763 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1764 if (IS_ERR(newstate))
1765 return PTR_ERR(newstate);
24311f88
TM		 1766 if (newstate != opendata->state)
1767 ret = -ESTALE;
643168c2 1768 nfs4_close_state(newstate, fmode);
24311f88 1769 return ret;
864472e9
TM		 1770}
1771
1772static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1773{
864472e9
TM		 1774 int ret;
1775
4f14c194
TM		 1776 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */
1777 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1778 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1779 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
864472e9 1780 /* memory barrier prior to reading state->n_* */
2ced46c2 1781 clear_bit(NFS_DELEGATED_STATE, &state->flags);
fd068b20 1782 clear_bit(NFS_OPEN_STATE, &state->flags);
864472e9 1783 smp_rmb();
24311f88
TM		 1784 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
1785 if (ret != 0)
1786 return ret;
1787 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE);
1788 if (ret != 0)
1789 return ret;
1790 ret = nfs4_open_recover_helper(opendata, FMODE_READ);
1791 if (ret != 0)
1792 return ret;
1ac7e2fd
TM		 1793 /*
1794 * We may have performed cached opens for all three recoveries.
1795 * Check if we need to update the current stateid.
1796 */
1797 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1798 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1799 write_seqlock(&state->seqlock);
1ac7e2fd 1800 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1801 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1802 write_sequnlock(&state->seqlock);
1ac7e2fd 1803 }
864472e9
TM		 1804 return 0;
1805}
1806
1da177e4
LT		 1807/*
1808 * OPEN_RECLAIM:
1809 * reclaim state on the server after a reboot.
1da177e4 1810 */
539cd03a 1811static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1812{
1ac7e2fd 1813 struct nfs_delegation *delegation;
864472e9 1814 struct nfs4_opendata *opendata;
dc0b027d 1815 fmode_t delegation_type = 0;
1da177e4
LT		 1816 int status;
1817
4a1c0893
TM		 1818 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1819 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1820 if (IS_ERR(opendata))
1821 return PTR_ERR(opendata);
1ac7e2fd
TM		 1822 rcu_read_lock();
1823 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1824 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1825 delegation_type = delegation->type;
1ac7e2fd 1826 rcu_read_unlock();
864472e9
TM		 1827 opendata->o_arg.u.delegation_type = delegation_type;
1828 status = nfs4_open_recover(opendata, state);
c6d00e63 1829 nfs4_opendata_put(opendata);
1da177e4
LT		 1830 return status;
1831}
1832
539cd03a 1833static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1834{
1835 struct nfs_server *server = NFS_SERVER(state->inode);
1836 struct nfs4_exception exception = { };
1837 int err;
1838 do {
539cd03a 1839 err = _nfs4_do_open_reclaim(ctx, state);
42113a75 1840 trace_nfs4_open_reclaim(ctx, 0, err);
49f9a0fa
TM		 1841 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1842 continue;
168667c4 1843 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1844 break;
1845 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1846 } while (exception.retry);
1847 return err;
1848}
1849
864472e9
TM		 1850static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1851{
1852 struct nfs_open_context *ctx;
1853 int ret;
1854
1855 ctx = nfs4_state_find_open_context(state);
1856 if (IS_ERR(ctx))
91876b13 1857 return -EAGAIN;
539cd03a 1858 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1859 put_nfs_open_context(ctx);
1860 return ret;
1861}
1862
db4f2e63 1863static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1da177e4 1864{
be76b5b6
TM		 1865 switch (err) {
1866 default:
1867 printk(KERN_ERR "NFS: %s: unhandled error "
1868 "%d.\n", __func__, err);
1869 case 0:
1870 case -ENOENT:
8eee52af 1871 case -EAGAIN:
be76b5b6
TM		 1872 case -ESTALE:
1873 break;
1874 case -NFS4ERR_BADSESSION:
1875 case -NFS4ERR_BADSLOT:
1876 case -NFS4ERR_BAD_HIGH_SLOT:
1877 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1878 case -NFS4ERR_DEADSESSION:
1879 set_bit(NFS_DELEGATED_STATE, &state->flags);
1880 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1881 return -EAGAIN;
1882 case -NFS4ERR_STALE_CLIENTID:
1883 case -NFS4ERR_STALE_STATEID:
1884 set_bit(NFS_DELEGATED_STATE, &state->flags);
be76b5b6
TM		 1885 /* Don't recall a delegation if it was lost */
1886 nfs4_schedule_lease_recovery(server->nfs_client);
1887 return -EAGAIN;
352297b9
CL		 1888 case -NFS4ERR_MOVED:
1889 nfs4_schedule_migration_recovery(server);
1890 return -EAGAIN;
8ef2f8d4
CL		 1891 case -NFS4ERR_LEASE_MOVED:
1892 nfs4_schedule_lease_moved_recovery(server->nfs_client);
1893 return -EAGAIN;
be76b5b6
TM		 1894 case -NFS4ERR_DELEG_REVOKED:
1895 case -NFS4ERR_ADMIN_REVOKED:
404ea356 1896 case -NFS4ERR_EXPIRED:
be76b5b6 1897 case -NFS4ERR_BAD_STATEID:
db4f2e63 1898 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 1899 nfs_inode_find_state_and_recover(state->inode,
1900 stateid);
1901 nfs4_schedule_stateid_recovery(server, state);
869f9dfa 1902 return -EAGAIN;
be76b5b6
TM		 1903 case -NFS4ERR_DELAY:
1904 case -NFS4ERR_GRACE:
1905 set_bit(NFS_DELEGATED_STATE, &state->flags);
1906 ssleep(1);
1907 return -EAGAIN;
db4f2e63
TM		 1908 case -ENOMEM:
1909 case -NFS4ERR_DENIED:
1910 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1911 return 0;
be76b5b6 1912 }
1da177e4
LT		 1913 return err;
1914}
1915
24311f88
TM		 1916int nfs4_open_delegation_recall(struct nfs_open_context *ctx,
1917 struct nfs4_state *state, const nfs4_stateid *stateid,
1918 fmode_t type)
db4f2e63
TM		 1919{
1920 struct nfs_server *server = NFS_SERVER(state->inode);
1921 struct nfs4_opendata *opendata;
24311f88 1922 int err = 0;
db4f2e63
TM		 1923
1924 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1925 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1926 if (IS_ERR(opendata))
1927 return PTR_ERR(opendata);
1928 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
5e99b532
JL		 1929 write_seqlock(&state->seqlock);
1930 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1931 write_sequnlock(&state->seqlock);
24311f88
TM		 1932 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1933 switch (type & (FMODE_READ|FMODE_WRITE)) {
1934 case FMODE_READ|FMODE_WRITE:
1935 case FMODE_WRITE:
1936 err = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
1937 if (err)
1938 break;
1939 err = nfs4_open_recover_helper(opendata, FMODE_WRITE);
1940 if (err)
1941 break;
1942 case FMODE_READ:
1943 err = nfs4_open_recover_helper(opendata, FMODE_READ);
1944 }
db4f2e63
TM		 1945 nfs4_opendata_put(opendata);
1946 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1947}
1948
be05c860
CL		 1949static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1950{
1951 struct nfs4_opendata *data = calldata;
1952
7981c8a6
AS		 1953 nfs4_setup_sequence(data->o_arg.server->nfs_client,
1954 &data->c_arg.seq_args, &data->c_res.seq_res, task);
be05c860
CL		 1955}
1956
cdd4e68b
TM		 1957static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1958{
1959 struct nfs4_opendata *data = calldata;
1960
17ead6c8 1961 nfs40_sequence_done(task, &data->c_res.seq_res);
be05c860 1962
cdd4e68b 1963 data->rpc_status = task->tk_status;
26e976a8 1964 if (data->rpc_status == 0) {
f597c537 1965 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1966 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1967 renew_lease(data->o_res.server, data->timestamp);
3e309914 1968 data->rpc_done = 1;
26e976a8 1969 }
cdd4e68b
TM		 1970}
1971
1972static void nfs4_open_confirm_release(void *calldata)
1973{
1974 struct nfs4_opendata *data = calldata;
1975 struct nfs4_state *state = NULL;
1976
1977 /* If this request hasn't been cancelled, do nothing */
1978 if (data->cancelled == 0)
1979 goto out_free;
1980 /* In case of error, no cleanup! */
3e309914 1981 if (!data->rpc_done)
cdd4e68b 1982 goto out_free;
cdd4e68b 1983 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1984 if (!IS_ERR(state))
643168c2 1985 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1986out_free:
c6d00e63 1987 nfs4_opendata_put(data);
cdd4e68b
TM		 1988}
1989
1990static const struct rpc_call_ops nfs4_open_confirm_ops = {
be05c860 1991 .rpc_call_prepare = nfs4_open_confirm_prepare,
cdd4e68b
TM		 1992 .rpc_call_done = nfs4_open_confirm_done,
1993 .rpc_release = nfs4_open_confirm_release,
1994};
1995
1996/*
1997 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1998 */
1999static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
2000{
2b0143b5 2001 struct nfs_server *server = NFS_SERVER(d_inode(data->dir));
cdd4e68b 2002 struct rpc_task *task;
5138fde0
TM		 2003 struct rpc_message msg = {
2004 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
2005 .rpc_argp = &data->c_arg,
2006 .rpc_resp = &data->c_res,
2007 .rpc_cred = data->owner->so_cred,
2008 };
c970aa85
TM		 2009 struct rpc_task_setup task_setup_data = {
2010 .rpc_client = server->client,
5138fde0 2011 .rpc_message = &msg,
c970aa85
TM		 2012 .callback_ops = &nfs4_open_confirm_ops,
2013 .callback_data = data,
101070ca 2014 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2015 .flags = RPC_TASK_ASYNC,
2016 };
1da177e4
LT		 2017 int status;
2018
17ead6c8 2019 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1);
c6d00e63 2020 kref_get(&data->kref);
3e309914
TM		 2021 data->rpc_done = 0;
2022 data->rpc_status = 0;
5138fde0 2023 data->timestamp = jiffies;
e92c1e0d
BC		 2024 if (data->is_recover)
2025 nfs4_set_sequence_privileged(&data->c_arg.seq_args);
c970aa85 2026 task = rpc_run_task(&task_setup_data);
7a1218a2 2027 if (IS_ERR(task))
cdd4e68b 2028 return PTR_ERR(task);
820bf85c 2029 status = rpc_wait_for_completion_task(task);
cdd4e68b
TM		 2030 if (status != 0) {
2031 data->cancelled = 1;
2032 smp_wmb();
2033 } else
2034 status = data->rpc_status;
e6b3c4db 2035 rpc_put_task(task);
1da177e4
LT		 2036 return status;
2037}
2038
24ac23ab 2039static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 2040{
24ac23ab
TM		 2041 struct nfs4_opendata *data = calldata;
2042 struct nfs4_state_owner *sp = data->owner;
549b19cc 2043 struct nfs_client *clp = sp->so_server->nfs_client;
2a606188 2044 enum open_claim_type4 claim = data->o_arg.claim;
5138fde0 2045
24ac23ab 2046 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 2047 goto out_wait;
aac00a8d
TM		 2048 /*
2049 * Check if we still need to send an OPEN call, or if we can use
2050 * a delegation instead.
2051 */
2052 if (data->state != NULL) {
2053 struct nfs_delegation *delegation;
2054
dc0b027d 2055 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 2056 goto out_no_action;
aac00a8d
TM		 2057 rcu_read_lock();
2058 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
2a606188 2059 if (can_open_delegated(delegation, data->o_arg.fmode, claim))
652f89f6 2060 goto unlock_no_action;
aac00a8d
TM		 2061 rcu_read_unlock();
2062 }
95b72eb0 2063 /* Update client id. */
549b19cc 2064 data->o_arg.clientid = clp->cl_clientid;
2a606188
TM		 2065 switch (claim) {
2066 default:
2067 break;
8188df17
TM		 2068 case NFS4_OPEN_CLAIM_PREVIOUS:
2069 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
2070 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 2071 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
8188df17
TM		 2072 case NFS4_OPEN_CLAIM_FH:
2073 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 2074 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
2075 }
26e976a8 2076 data->timestamp = jiffies;
42e1cca7 2077 if (nfs4_setup_sequence(data->o_arg.server->nfs_client,
d898528c 2078 &data->o_arg.seq_args,
2240a9e2
TM		 2079 &data->o_res.seq_res,
2080 task) != 0)
2081 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 2082
2083 /* Set the create mode (note dependency on the session type) */
2084 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
2085 if (data->o_arg.open_flags & O_EXCL) {
2086 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
2087 if (nfs4_has_persistent_session(clp))
2088 data->o_arg.createmode = NFS4_CREATE_GUARDED;
2089 else if (clp->cl_mvops->minor_version > 0)
2090 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
2091 }
6ee41268 2092 return;
652f89f6 2093unlock_no_action:
9759b0fb 2094 trace_nfs4_cached_open(data->state);
652f89f6 2095 rcu_read_unlock();
6ee41268
TM		 2096out_no_action:
2097 task->tk_action = NULL;
c8da19b9 2098out_wait:
b75ad4cd 2099 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 2100}
2101
24ac23ab
TM		 2102static void nfs4_open_done(struct rpc_task *task, void *calldata)
2103{
2104 struct nfs4_opendata *data = calldata;
1da177e4 2105
24ac23ab 2106 data->rpc_status = task->tk_status;
d898528c 2107
2e80dbe7 2108 if (!nfs4_sequence_process(task, &data->o_res.seq_res))
14516c3a 2109 return;
d898528c 2110
24ac23ab 2111 if (task->tk_status == 0) {
807d66d8
TM		 2112 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
2113 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 2114 case S_IFREG:
2115 break;
2116 case S_IFLNK:
24ac23ab 2117 data->rpc_status = -ELOOP;
6f926b5b
TM		 2118 break;
2119 case S_IFDIR:
24ac23ab 2120 data->rpc_status = -EISDIR;
6f926b5b
TM		 2121 break;
2122 default:
24ac23ab 2123 data->rpc_status = -ENOTDIR;
807d66d8 2124 }
6f926b5b 2125 }
26e976a8 2126 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 2127 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
2128 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 2129 }
3e309914 2130 data->rpc_done = 1;
24ac23ab 2131}
6f926b5b 2132
24ac23ab
TM		 2133static void nfs4_open_release(void *calldata)
2134{
2135 struct nfs4_opendata *data = calldata;
2136 struct nfs4_state *state = NULL;
2137
2138 /* If this request hasn't been cancelled, do nothing */
2139 if (data->cancelled == 0)
2140 goto out_free;
2141 /* In case of error, no cleanup! */
3e309914 2142 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 2143 goto out_free;
2144 /* In case we need an open_confirm, no cleanup! */
2145 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
2146 goto out_free;
24ac23ab 2147 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 2148 if (!IS_ERR(state))
643168c2 2149 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 2150out_free:
c6d00e63 2151 nfs4_opendata_put(data);
24ac23ab
TM		 2152}
2153
2154static const struct rpc_call_ops nfs4_open_ops = {
2155 .rpc_call_prepare = nfs4_open_prepare,
2156 .rpc_call_done = nfs4_open_done,
2157 .rpc_release = nfs4_open_release,
2158};
2159
b257957e 2160static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab 2161{
2b0143b5 2162 struct inode *dir = d_inode(data->dir);
24ac23ab
TM		 2163 struct nfs_server *server = NFS_SERVER(dir);
2164 struct nfs_openargs *o_arg = &data->o_arg;
2165 struct nfs_openres *o_res = &data->o_res;
2166 struct rpc_task *task;
5138fde0
TM		 2167 struct rpc_message msg = {
2168 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
2169 .rpc_argp = o_arg,
2170 .rpc_resp = o_res,
2171 .rpc_cred = data->owner->so_cred,
2172 };
c970aa85
TM		 2173 struct rpc_task_setup task_setup_data = {
2174 .rpc_client = server->client,
5138fde0 2175 .rpc_message = &msg,
c970aa85
TM		 2176 .callback_ops = &nfs4_open_ops,
2177 .callback_data = data,
101070ca 2178 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2179 .flags = RPC_TASK_ASYNC,
2180 };
24ac23ab
TM		 2181 int status;
2182
a9c92d6b 2183 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 2184 kref_get(&data->kref);
3e309914
TM		 2185 data->rpc_done = 0;
2186 data->rpc_status = 0;
2ced46c2 2187 data->cancelled = 0;
bdeca1b7
TM		 2188 data->is_recover = 0;
2189 if (isrecover) {
8fe72bac 2190 nfs4_set_sequence_privileged(&o_arg->seq_args);
bdeca1b7
TM		 2191 data->is_recover = 1;
2192 }
c970aa85 2193 task = rpc_run_task(&task_setup_data);
d9b67e1e
AS		 2194 if (IS_ERR(task))
2195 return PTR_ERR(task);
820bf85c 2196 status = rpc_wait_for_completion_task(task);
d9b67e1e
AS		 2197 if (status != 0) {
2198 data->cancelled = 1;
2199 smp_wmb();
2200 } else
2201 status = data->rpc_status;
2202 rpc_put_task(task);
b257957e
AB		 2203
2204 return status;
2205}
2206
2207static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
2208{
2b0143b5 2209 struct inode *dir = d_inode(data->dir);
b257957e 2210 struct nfs_openres *o_res = &data->o_res;
d9b67e1e 2211 int status;
b257957e
AB		 2212
2213 status = nfs4_run_open_task(data, 1);
2214 if (status != 0 || !data->rpc_done)
2215 return status;
2216
6926afd1
TM		 2217 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
2218
d7e98258 2219 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM)
b257957e 2220 status = _nfs4_proc_open_confirm(data);
b257957e
AB		 2221
2222 return status;
2223}
2224
f3792d63
TM		 2225/*
2226 * Additional permission checks in order to distinguish between an
2227 * open for read, and an open for execute. This works around the
2228 * fact that NFSv4 OPEN treats read and execute permissions as being
2229 * the same.
2230 * Note that in the non-execute case, we want to turn off permission
2231 * checking if we just created a new file (POSIX open() semantics).
2232 */
6168f62c
WAA		 2233static int nfs4_opendata_access(struct rpc_cred *cred,
2234 struct nfs4_opendata *opendata,
f8d9a897
WAA		 2235 struct nfs4_state *state, fmode_t fmode,
2236 int openflags)
6168f62c
WAA		 2237{
2238 struct nfs_access_entry cache;
2239 u32 mask;
2240
2241 /* access call failed or for some reason the server doesn't
2242 * support any access modes -- defer access call until later */
2243 if (opendata->o_res.access_supported == 0)
2244 return 0;
2245
2246 mask = 0;
f3792d63
TM		 2247 /*
2248 * Use openflags to check for exec, because fmode won't
2249 * always have FMODE_EXEC set when file open for exec.
2250 */
f8d9a897
WAA		 2251 if (openflags & __FMODE_EXEC) {
2252 /* ONLY check for exec rights */
2253 mask = MAY_EXEC;
f3792d63 2254 } else if ((fmode & FMODE_READ) && !opendata->file_created)
f8d9a897 2255 mask = MAY_READ;
6168f62c
WAA		 2256
2257 cache.cred = cred;
2258 cache.jiffies = jiffies;
2259 nfs_access_set_mask(&cache, opendata->o_res.access_result);
2260 nfs_access_add_cache(state->inode, &cache);
2261
bbd3a8ee 2262 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 2263 return 0;
2264
2265 /* even though OPEN succeeded, access is denied. Close the file */
2266 nfs4_close_state(state, fmode);
998f40b5 2267 return -EACCES;
6168f62c
WAA		 2268}
2269
b257957e
AB		 2270/*
2271 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2272 */
2273static int _nfs4_proc_open(struct nfs4_opendata *data)
2274{
2b0143b5 2275 struct inode *dir = d_inode(data->dir);
b257957e
AB		 2276 struct nfs_server *server = NFS_SERVER(dir);
2277 struct nfs_openargs *o_arg = &data->o_arg;
2278 struct nfs_openres *o_res = &data->o_res;
2279 int status;
2280
2281 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 2282 if (!data->rpc_done)
2283 return status;
2284 if (status != 0) {
2285 if (status == -NFS4ERR_BADNAME &&
2286 !(o_arg->open_flags & O_CREAT))
2287 return -ENOENT;
24ac23ab 2288 return status;
08ef7bd3 2289 }
24ac23ab 2290
6926afd1
TM		 2291 nfs_fattr_map_and_free_names(server, &data->f_attr);
2292
5bc2afc2 2293 if (o_arg->open_flags & O_CREAT) {
5bc2afc2
TM		 2294 if (o_arg->open_flags & O_EXCL)
2295 data->file_created = 1;
2296 else if (o_res->cinfo.before != o_res->cinfo.after)
2297 data->file_created = 1;
2dfc6173 2298 if (data->file_created || dir->i_version != o_res->cinfo.after)
d3129ef6
TM		 2299 update_changeattr(dir, &o_res->cinfo,
2300 o_res->f_attr->time_start);
5bc2afc2 2301 }
0df5dd4a
TM		 2302 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2303 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 2304 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 2305 status = _nfs4_proc_open_confirm(data);
1da177e4 2306 if (status != 0)
24ac23ab 2307 return status;
1da177e4
LT		 2308 }
2309 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
8935ef66 2310 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
24ac23ab 2311 return 0;
1da177e4
LT		 2312}
2313
1da177e4
LT		 2314/*
2315 * OPEN_EXPIRED:
2316 * reclaim state on the server after a network partition.
2317 * Assumes caller holds the appropriate lock
2318 */
539cd03a 2319static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 2320{
e56e0b78 2321 struct nfs4_opendata *opendata;
864472e9 2322 int ret;
1da177e4 2323
4a1c0893 2324 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 2325 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 2326 if (IS_ERR(opendata))
2327 return PTR_ERR(opendata);
864472e9 2328 ret = nfs4_open_recover(opendata, state);
35d05778 2329 if (ret == -ESTALE)
3d4ff43d 2330 d_drop(ctx->dentry);
c6d00e63 2331 nfs4_opendata_put(opendata);
864472e9 2332 return ret;
1da177e4
LT		 2333}
2334
a9ed2e25 2335static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 2336{
539cd03a 2337 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 2338 struct nfs4_exception exception = { };
2339 int err;
2340
2341 do {
539cd03a 2342 err = _nfs4_open_expired(ctx, state);
42113a75 2343 trace_nfs4_open_expired(ctx, 0, err);
49f9a0fa
TM		 2344 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2345 continue;
a9ed2e25
TM		 2346 switch (err) {
2347 default:
2348 goto out;
2349 case -NFS4ERR_GRACE:
2350 case -NFS4ERR_DELAY:
2351 nfs4_handle_exception(server, err, &exception);
2352 err = 0;
2353 }
202b50dc 2354 } while (exception.retry);
a9ed2e25 2355out:
202b50dc
TM		 2356 return err;
2357}
2358
1da177e4
LT		 2359static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2360{
1da177e4 2361 struct nfs_open_context *ctx;
864472e9 2362 int ret;
1da177e4 2363
864472e9
TM		 2364 ctx = nfs4_state_find_open_context(state);
2365 if (IS_ERR(ctx))
91876b13 2366 return -EAGAIN;
539cd03a 2367 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 2368 put_nfs_open_context(ctx);
2369 return ret;
1da177e4
LT		 2370}
2371
41020b67
TM		 2372static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state,
2373 const nfs4_stateid *stateid)
4dfd4f7a 2374{
41020b67 2375 nfs_remove_bad_delegation(state->inode, stateid);
4dfd4f7a
TM		 2376 write_seqlock(&state->seqlock);
2377 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2378 write_sequnlock(&state->seqlock);
2379 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2380}
2381
2382static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
2383{
2384 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
41020b67 2385 nfs_finish_clear_delegation_stateid(state, NULL);
4dfd4f7a
TM		 2386}
2387
2388static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2389{
2390 /* NFSv4.0 doesn't allow for delegation recovery on open expire */
2391 nfs40_clear_delegation_stateid(state);
2392 return nfs4_open_expired(sp, state);
2393}
2394
45870d69
TM		 2395static int nfs40_test_and_free_expired_stateid(struct nfs_server *server,
2396 nfs4_stateid *stateid,
2397 struct rpc_cred *cred)
2398{
2399 return -NFS4ERR_BAD_STATEID;
2400}
2401
f062eb6c 2402#if defined(CONFIG_NFS_V4_1)
4586f6e2
TM		 2403static int nfs41_test_and_free_expired_stateid(struct nfs_server *server,
2404 nfs4_stateid *stateid,
2405 struct rpc_cred *cred)
2406{
2407 int status;
2408
f7a62ada
TM		 2409 switch (stateid->type) {
2410 default:
2411 break;
2412 case NFS4_INVALID_STATEID_TYPE:
2413 case NFS4_SPECIAL_STATEID_TYPE:
2414 return -NFS4ERR_BAD_STATEID;
2415 case NFS4_REVOKED_STATEID_TYPE:
2416 goto out_free;
2417 }
4586f6e2 2418
f7a62ada 2419 status = nfs41_test_stateid(server, stateid, cred);
4586f6e2
TM		 2420 switch (status) {
2421 case -NFS4ERR_EXPIRED:
2422 case -NFS4ERR_ADMIN_REVOKED:
2423 case -NFS4ERR_DELEG_REVOKED:
f7a62ada
TM		 2424 break;
2425 default:
4586f6e2
TM		 2426 return status;
2427 }
f7a62ada
TM		 2428out_free:
2429 /* Ack the revoked state to the server */
f0b0bf88 2430 nfs41_free_stateid(server, stateid, cred, true);
f7a62ada 2431 return -NFS4ERR_EXPIRED;
4586f6e2
TM		 2432}
2433
0c116cad 2434static void nfs41_check_delegation_stateid(struct nfs4_state *state)
f062eb6c 2435{
f062eb6c 2436 struct nfs_server *server = NFS_SERVER(state->inode);
0c116cad 2437 nfs4_stateid stateid;
ab7cb0df 2438 struct nfs_delegation *delegation;
0c116cad
TM		 2439 struct rpc_cred *cred;
2440 int status;
3e60ffdd 2441
ab7cb0df
TM		 2442 /* Get the delegation credential for use by test/free_stateid */
2443 rcu_read_lock();
2444 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
0c116cad 2445 if (delegation == NULL) {
ab7cb0df 2446 rcu_read_unlock();
0c116cad
TM		 2447 return;
2448 }
2449
2450 nfs4_stateid_copy(&stateid, &delegation->stateid);
4c8e5447
TM		 2451 if (test_bit(NFS_DELEGATION_REVOKED, &delegation->flags)) {
2452 rcu_read_unlock();
41020b67 2453 nfs_finish_clear_delegation_stateid(state, &stateid);
4c8e5447
TM		 2454 return;
2455 }
0c116cad 2456
63d63cbf
TM		 2457 if (!test_and_clear_bit(NFS_DELEGATION_TEST_EXPIRED, &delegation->flags)) {
2458 rcu_read_unlock();
2459 return;
2460 }
2461
0c116cad
TM		 2462 cred = get_rpccred(delegation->cred);
2463 rcu_read_unlock();
4586f6e2 2464 status = nfs41_test_and_free_expired_stateid(server, &stateid, cred);
0c116cad 2465 trace_nfs4_test_delegation_stateid(state, NULL, status);
f7a62ada 2466 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID)
41020b67 2467 nfs_finish_clear_delegation_stateid(state, &stateid);
ab7cb0df 2468
0c116cad 2469 put_rpccred(cred);
3e60ffdd
CL		 2470}
2471
c5896fc8
TM		 2472/**
2473 * nfs41_check_expired_locks - possibly free a lock stateid
2474 *
2475 * @state: NFSv4 state for an inode
2476 *
2477 * Returns NFS_OK if recovery for this stateid is now finished.
2478 * Otherwise a negative NFS4ERR value is returned.
2479 */
2480static int nfs41_check_expired_locks(struct nfs4_state *state)
2481{
2482 int status, ret = NFS_OK;
d75a6a0e 2483 struct nfs4_lock_state *lsp, *prev = NULL;
c5896fc8
TM		 2484 struct nfs_server *server = NFS_SERVER(state->inode);
2485
2486 if (!test_bit(LK_STATE_IN_USE, &state->flags))
2487 goto out;
d75a6a0e
BC		 2488
2489 spin_lock(&state->state_lock);
c5896fc8
TM		 2490 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
2491 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
2492 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
2493
d75a6a0e
BC		 2494 atomic_inc(&lsp->ls_count);
2495 spin_unlock(&state->state_lock);
2496
2497 nfs4_put_lock_state(prev);
2498 prev = lsp;
2499
c5896fc8
TM		 2500 status = nfs41_test_and_free_expired_stateid(server,
2501 &lsp->ls_stateid,
2502 cred);
2503 trace_nfs4_test_lock_stateid(state, lsp, status);
2504 if (status == -NFS4ERR_EXPIRED ||
2505 status == -NFS4ERR_BAD_STATEID) {
2506 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
67dd4830 2507 lsp->ls_stateid.type = NFS4_INVALID_STATEID_TYPE;
c5896fc8
TM		 2508 if (!recover_lost_locks)
2509 set_bit(NFS_LOCK_LOST, &lsp->ls_flags);
2510 } else if (status != NFS_OK) {
2511 ret = status;
d75a6a0e
BC		 2512 nfs4_put_lock_state(prev);
2513 goto out;
c5896fc8 2514 }
d75a6a0e 2515 spin_lock(&state->state_lock);
c5896fc8 2516 }
d75a6a0e
BC		 2517 }
2518 spin_unlock(&state->state_lock);
2519 nfs4_put_lock_state(prev);
c5896fc8
TM		 2520out:
2521 return ret;
2522}
2523
3e60ffdd
CL		 2524/**
2525 * nfs41_check_open_stateid - possibly free an open stateid
2526 *
2527 * @state: NFSv4 state for an inode
2528 *
2529 * Returns NFS_OK if recovery for this stateid is now finished.
2530 * Otherwise a negative NFS4ERR value is returned.
2531 */
2532static int nfs41_check_open_stateid(struct nfs4_state *state)
2533{
2534 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 2535 nfs4_stateid *stateid = &state->open_stateid;
ab7cb0df 2536 struct rpc_cred *cred = state->owner->so_cred;
3e60ffdd
CL		 2537 int status;
2538
b134fc4a 2539 if (test_bit(NFS_OPEN_STATE, &state->flags) == 0) {
8a64c4ef
TM		 2540 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) {
2541 if (nfs4_have_delegation(state->inode, state->state))
2542 return NFS_OK;
2543 return -NFS4ERR_OPENMODE;
2544 }
3e60ffdd 2545 return -NFS4ERR_BAD_STATEID;
b134fc4a 2546 }
4586f6e2 2547 status = nfs41_test_and_free_expired_stateid(server, stateid, cred);
08cb47fa 2548 trace_nfs4_test_open_stateid(state, NULL, status);
f7a62ada 2549 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID) {
3e60ffdd
CL		 2550 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2551 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2552 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 2553 clear_bit(NFS_OPEN_STATE, &state->flags);
67dd4830 2554 stateid->type = NFS4_INVALID_STATEID_TYPE;
b01dd1d8 2555 }
8a64c4ef
TM		 2556 if (status != NFS_OK)
2557 return status;
2558 if (nfs_open_stateid_recover_openmode(state))
2559 return -NFS4ERR_OPENMODE;
2560 return NFS_OK;
b01dd1d8
BS		 2561}
2562
2563static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2564{
eb64cf96 2565 int status;
b01dd1d8 2566
0c116cad 2567 nfs41_check_delegation_stateid(state);
c5896fc8
TM		 2568 status = nfs41_check_expired_locks(state);
2569 if (status != NFS_OK)
2570 return status;
3e60ffdd 2571 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 2572 if (status != NFS_OK)
2573 status = nfs4_open_expired(sp, state);
2574 return status;
f062eb6c
BS		 2575}
2576#endif
2577
aa53ed54
JL		 2578/*
2579 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2580 * fields corresponding to attributes that were used to store the verifier.
2581 * Make sure we clobber those fields in the later setattr call
2582 */
5334c5bd
KM		 2583static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata,
2584 struct iattr *sattr, struct nfs4_label **label)
aa53ed54 2585{
5334c5bd
KM		 2586 const u32 *attrset = opendata->o_res.attrset;
2587
2588 if ((attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
aa53ed54
JL		 2589 !(sattr->ia_valid & ATTR_ATIME_SET))
2590 sattr->ia_valid |= ATTR_ATIME;
2591
5334c5bd 2592 if ((attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
aa53ed54
JL		 2593 !(sattr->ia_valid & ATTR_MTIME_SET))
2594 sattr->ia_valid |= ATTR_MTIME;
5334c5bd
KM		 2595
2596 /* Except MODE, it seems harmless of setting twice. */
a430607b
BC		 2597 if (opendata->o_arg.createmode != NFS4_CREATE_EXCLUSIVE &&
2598 attrset[1] & FATTR4_WORD1_MODE)
5334c5bd
KM		 2599 sattr->ia_valid &= ~ATTR_MODE;
2600
2601 if (attrset[2] & FATTR4_WORD2_SECURITY_LABEL)
2602 *label = NULL;
aa53ed54
JL		 2603}
2604
c21443c2
TM		 2605static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2606 fmode_t fmode,
2607 int flags,
3efb9722 2608 struct nfs_open_context *ctx)
c21443c2
TM		 2609{
2610 struct nfs4_state_owner *sp = opendata->owner;
2611 struct nfs_server *server = sp->so_server;
275bb307 2612 struct dentry *dentry;
c21443c2
TM		 2613 struct nfs4_state *state;
2614 unsigned int seq;
2615 int ret;
2616
2617 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2618
2619 ret = _nfs4_proc_open(opendata);
dca78001 2620 if (ret != 0)
c21443c2
TM		 2621 goto out;
2622
2623 state = nfs4_opendata_to_nfs4_state(opendata);
2624 ret = PTR_ERR(state);
2625 if (IS_ERR(state))
2626 goto out;
2627 if (server->caps & NFS_CAP_POSIX_LOCK)
2628 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
a8ce377a
JL		 2629 if (opendata->o_res.rflags & NFS4_OPEN_RESULT_MAY_NOTIFY_LOCK)
2630 set_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags);
c21443c2 2631
275bb307 2632 dentry = opendata->dentry;
2b0143b5 2633 if (d_really_is_negative(dentry)) {
668d0cd5 2634 struct dentry *alias;
275bb307 2635 d_drop(dentry);
668d0cd5
AV		 2636 alias = d_exact_alias(dentry, state->inode);
2637 if (!alias)
2638 alias = d_splice_alias(igrab(state->inode), dentry);
2639 /* d_splice_alias() can't fail here - it's a non-directory */
2640 if (alias) {
275bb307 2641 dput(ctx->dentry);
668d0cd5 2642 ctx->dentry = dentry = alias;
275bb307
TM		 2643 }
2644 nfs_set_verifier(dentry,
2b0143b5 2645 nfs_save_change_attribute(d_inode(opendata->dir)));
275bb307
TM		 2646 }
2647
c21443c2
TM		 2648 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2649 if (ret != 0)
2650 goto out;
2651
3efb9722 2652 ctx->state = state;
2b0143b5 2653 if (d_inode(dentry) == state->inode) {
c45ffdd2
TM		 2654 nfs_inode_attach_open_context(ctx);
2655 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2656 nfs4_schedule_stateid_recovery(server, state);
2657 }
c21443c2
TM		 2658out:
2659 return ret;
2660}
2661
1da177e4 2662/*
24ac23ab 2663 * Returns a referenced nfs4_state
1da177e4 2664 */
82be417a 2665static int _nfs4_do_open(struct inode *dir,
4197a055 2666 struct nfs_open_context *ctx,
82be417a
AA		 2667 int flags,
2668 struct iattr *sattr,
5bc2afc2
TM		 2669 struct nfs4_label *label,
2670 int *opened)
1da177e4
LT		 2671{
2672 struct nfs4_state_owner *sp;
2673 struct nfs4_state *state = NULL;
2674 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 2675 struct nfs4_opendata *opendata;
4197a055
TM		 2676 struct dentry *dentry = ctx->dentry;
2677 struct rpc_cred *cred = ctx->cred;
2678 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2679 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
49f9a0fa 2680 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
1775fd3e 2681 struct nfs4_label *olabel = NULL;
aac00a8d 2682 int status;
1da177e4
LT		 2683
2684 /* Protect against reboot recovery conflicts */
1da177e4 2685 status = -ENOMEM;
d1e284d5
TM		 2686 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2687 if (sp == NULL) {
1da177e4
LT		 2688 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2689 goto out_err;
2690 }
334f87dd 2691 status = nfs4_client_recover_expired_lease(server->nfs_client);
58d9714a 2692 if (status != 0)
b4454fe1 2693 goto err_put_state_owner;
2b0143b5
DH		 2694 if (d_really_is_positive(dentry))
2695 nfs4_return_incompatible_delegation(d_inode(dentry), fmode);
58d9714a 2696 status = -ENOMEM;
2b0143b5 2697 if (d_really_is_positive(dentry))
49f9a0fa 2698 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2699 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
1775fd3e 2700 label, claim, GFP_KERNEL);
e56e0b78 2701 if (opendata == NULL)
95d35cb4 2702 goto err_put_state_owner;
1da177e4 2703
14c43f76
DQ		 2704 if (label) {
2705 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2706 if (IS_ERR(olabel)) {
2707 status = PTR_ERR(olabel);
2708 goto err_opendata_put;
2709 }
2710 }
2711
e911b815
TM		 2712 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2713 if (!opendata->f_attr.mdsthreshold) {
2714 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2715 if (!opendata->f_attr.mdsthreshold)
2716 goto err_free_label;
2717 }
1549210f 2718 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2719 }
2b0143b5
DH		 2720 if (d_really_is_positive(dentry))
2721 opendata->state = nfs4_get_open_state(d_inode(dentry), sp);
aac00a8d 2722
3efb9722 2723 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
6168f62c 2724 if (status != 0)
14c43f76 2725 goto err_free_label;
3efb9722 2726 state = ctx->state;
6168f62c 2727
efcbc04e 2728 if ((opendata->o_arg.open_flags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) &&
549b19cc 2729 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
5334c5bd 2730 nfs4_exclusive_attrset(opendata, sattr, &label);
a1d1c4f1
TM		 2731 /*
2732 * send create attributes which was not set by open
2733 * with an extra setattr.
2734 */
2735 if (sattr->ia_valid & NFS4_VALID_ATTRS) {
2736 nfs_fattr_init(opendata->o_res.f_attr);
2737 status = nfs4_do_setattr(state->inode, cred,
2738 opendata->o_res.f_attr, sattr,
29b59f94 2739 ctx, label, olabel);
a1d1c4f1
TM		 2740 if (status == 0) {
2741 nfs_setattr_update_inode(state->inode, sattr,
2742 opendata->o_res.f_attr);
2743 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
2744 }
1775fd3e 2745 }
0ab64e0e 2746 }
c5c3fb5f 2747 if (opened && opendata->file_created)
5bc2afc2 2748 *opened |= FILE_CREATED;
82be417a 2749
e911b815 2750 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
82be417a 2751 *ctx_th = opendata->f_attr.mdsthreshold;
e911b815
TM		 2752 opendata->f_attr.mdsthreshold = NULL;
2753 }
82be417a 2754
14c43f76
DQ		 2755 nfs4_label_free(olabel);
2756
c6d00e63 2757 nfs4_opendata_put(opendata);
1da177e4 2758 nfs4_put_state_owner(sp);
1da177e4 2759 return 0;
14c43f76
DQ		 2760err_free_label:
2761 nfs4_label_free(olabel);
c6d00e63
TM		 2762err_opendata_put:
2763 nfs4_opendata_put(opendata);
e56e0b78
TM		 2764err_put_state_owner:
2765 nfs4_put_state_owner(sp);
1da177e4 2766out_err:
1da177e4
LT		 2767 return status;
2768}
2769
2770
82be417a 2771static struct nfs4_state *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 2777{
49f9a0fa 2778 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2779 struct nfs4_exception exception = { };
2780 struct nfs4_state *res;
2781 int status;
2782
2783 do {
5bc2afc2 2784 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
3efb9722 2785 res = ctx->state;
42113a75 2786 trace_nfs4_open_file(ctx, flags, status);
1da177e4
LT		 2787 if (status == 0)
2788 break;
2789 /* NOTE: BAD_SEQID means the server and client disagree about the
2790 * book-keeping w.r.t. state-changing operations
2791 * (OPEN/CLOSE/LOCK/LOCKU...)
2792 * It is actually a sign of a bug on the client or on the server.
2793 *
2794 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2795 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2796 * have unhashed the old state_owner for us, and that we can
2797 * therefore safely retry using a new one. We should still warn
2798 * the user though...
2799 */
2800 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2801 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2802 " returned a bad sequence-id error!\n",
2803 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2804 exception.retry = 1;
2805 continue;
2806 }
550f5747
TM		 2807 /*
2808 * BAD_STATEID on OPEN means that the server cancelled our
2809 * state before it received the OPEN_CONFIRM.
2810 * Recover by retrying the request as per the discussion
2811 * on Page 181 of RFC3530.
2812 */
2813 if (status == -NFS4ERR_BAD_STATEID) {
2814 exception.retry = 1;
2815 continue;
2816 }
aac00a8d
TM		 2817 if (status == -EAGAIN) {
2818 /* We must have found a delegation */
2819 exception.retry = 1;
2820 continue;
2821 }
49f9a0fa
TM		 2822 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2823 continue;
2824 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2825 status, &exception));
2826 } while (exception.retry);
2827 return res;
2828}
2829
8487c479
TM		 2830static int _nfs4_do_setattr(struct inode *inode,
2831 struct nfs_setattrargs *arg,
2832 struct nfs_setattrres *res,
2833 struct rpc_cred *cred,
29b59f94 2834 struct nfs_open_context *ctx)
1da177e4 2835{
3e4f6290 2836 struct nfs_server *server = NFS_SERVER(inode);
d9b67e1e 2837 struct rpc_message msg = {
659bfcd6 2838 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
8487c479
TM		 2839 .rpc_argp = arg,
2840 .rpc_resp = res,
659bfcd6 2841 .rpc_cred = cred,
d9b67e1e 2842 };
abf4e13c 2843 struct rpc_cred *delegation_cred = NULL;
26e976a8 2844 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2845 fmode_t fmode;
2846 bool truncate;
65e4308d 2847 int status;
1da177e4 2848
8487c479 2849 nfs_fattr_init(res->fattr);
1da177e4 2850
ee3ae84e 2851 /* Servers should only apply open mode checks for file size changes */
8487c479 2852 truncate = (arg->iap->ia_valid & ATTR_SIZE) ? true : false;
ee3ae84e
TM		 2853 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2854
8487c479 2855 if (nfs4_copy_delegation_stateid(inode, fmode, &arg->stateid, &delegation_cred)) {
ee3ae84e 2856 /* Use that stateid */
29b59f94 2857 } else if (truncate && ctx != NULL) {
17393475 2858 struct nfs_lock_context *l_ctx;
29b59f94 2859 if (!nfs4_valid_open_stateid(ctx->state))
0418dae1 2860 return -EBADF;
17393475
N		 2861 l_ctx = nfs_get_lock_context(ctx);
2862 if (IS_ERR(l_ctx))
2863 return PTR_ERR(l_ctx);
7a0566b3
N		 2864 status = nfs4_select_rw_stateid(ctx->state, FMODE_WRITE, l_ctx,
2865 &arg->stateid, &delegation_cred);
2866 nfs_put_lock_context(l_ctx);
2867 if (status == -EIO)
0418dae1 2868 return -EBADF;
08e9eac4 2869 } else
8487c479 2870 nfs4_stateid_copy(&arg->stateid, &zero_stateid);
abf4e13c
TM		 2871 if (delegation_cred)
2872 msg.rpc_cred = delegation_cred;
1da177e4 2873
8487c479 2874 status = nfs4_call_sync(server->client, server, &msg, &arg->seq_args, &res->seq_res, 1);
abf4e13c
TM		 2875
2876 put_rpccred(delegation_cred);
29b59f94 2877 if (status == 0 && ctx != NULL)
26e976a8 2878 renew_lease(server, timestamp);
8487c479 2879 trace_nfs4_setattr(inode, &arg->stateid, status);
65e4308d 2880 return status;
1da177e4
LT		 2881}
2882
659bfcd6
TM		 2883static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2884 struct nfs_fattr *fattr, struct iattr *sattr,
29b59f94 2885 struct nfs_open_context *ctx, struct nfs4_label *ilabel,
1775fd3e 2886 struct nfs4_label *olabel)
1da177e4 2887{
3e4f6290 2888 struct nfs_server *server = NFS_SERVER(inode);
29b59f94 2889 struct nfs4_state *state = ctx ? ctx->state : NULL;
d9b67e1e
AS		 2890 struct nfs_setattrargs arg = {
2891 .fh = NFS_FH(inode),
2892 .iap = sattr,
8487c479
TM		 2893 .server = server,
2894 .bitmask = server->attr_bitmask,
2895 .label = ilabel,
d9b67e1e
AS		 2896 };
2897 struct nfs_setattrres res = {
8487c479
TM		 2898 .fattr = fattr,
2899 .label = olabel,
2900 .server = server,
d9b67e1e 2901 };
a1d0b5ee
TM		 2902 struct nfs4_exception exception = {
2903 .state = state,
3114ea7a 2904 .inode = inode,
8487c479 2905 .stateid = &arg.stateid,
a1d0b5ee 2906 };
1da177e4 2907 int err;
8487c479
TM		 2908
2909 arg.bitmask = nfs4_bitmask(server, ilabel);
2910 if (ilabel)
2911 arg.bitmask = nfs4_bitmask(server, olabel);
2912
1da177e4 2913 do {
29b59f94 2914 err = _nfs4_do_setattr(inode, &arg, &res, cred, ctx);
451146be
TM		 2915 switch (err) {
2916 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 2917 if (!(sattr->ia_valid & ATTR_SIZE)) {
2918 pr_warn_once("NFSv4: server %s is incorrectly "
2919 "applying open mode checks to "
2920 "a SETATTR that is not "
2921 "changing file size.\n",
2922 server->nfs_client->cl_hostname);
2923 }
451146be
TM		 2924 if (state && !(state->state & FMODE_WRITE)) {
2925 err = -EBADF;
2926 if (sattr->ia_valid & ATTR_OPEN)
2927 err = -EACCES;
2928 goto out;
2929 }
2930 }
2931 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2932 } while (exception.retry);
451146be 2933out:
1da177e4
LT		 2934 return err;
2935}
2936
500d701f
PT		 2937static bool
2938nfs4_wait_on_layoutreturn(struct inode *inode, struct rpc_task *task)
2939{
2940 if (inode == NULL || !nfs_have_layout(inode))
2941 return false;
2942
2943 return pnfs_wait_on_layoutreturn(inode, task);
2944}
2945
1da177e4
LT		 2946struct nfs4_closedata {
2947 struct inode *inode;
2948 struct nfs4_state *state;
2949 struct nfs_closeargs arg;
2950 struct nfs_closeres res;
cf805165
TM		 2951 struct {
2952 struct nfs4_layoutreturn_args arg;
2953 struct nfs4_layoutreturn_res res;
4d796d75 2954 struct nfs4_xdr_opaque_data ld_private;
cf805165
TM		 2955 u32 roc_barrier;
2956 bool roc;
2957 } lr;
516a6af6 2958 struct nfs_fattr fattr;
26e976a8 2959 unsigned long timestamp;
1da177e4
LT		 2960};
2961
963d8fe5 2962static void nfs4_free_closedata(void *data)
9512135d 2963{
963d8fe5
TM		 2964 struct nfs4_closedata *calldata = data;
2965 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2966 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2967
cf805165 2968 if (calldata->lr.roc)
1c5bd76d
TM		 2969 pnfs_roc_release(&calldata->lr.arg, &calldata->lr.res,
2970 calldata->res.lr_ret);
9512135d
TM		 2971 nfs4_put_open_state(calldata->state);
2972 nfs_free_seqid(calldata->arg.seqid);
9512135d 2973 nfs4_put_state_owner(sp);
322b2b90 2974 nfs_sb_deactive(sb);
9512135d
TM		 2975 kfree(calldata);
2976}
2977
963d8fe5 2978static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2979{
963d8fe5 2980 struct nfs4_closedata *calldata = data;
1da177e4 2981 struct nfs4_state *state = calldata->state;
1da177e4 2982 struct nfs_server *server = NFS_SERVER(calldata->inode);
412f6c4c 2983 nfs4_stateid *res_stateid = NULL;
1da177e4 2984
a3ca5651 2985 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2986 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2987 return;
42113a75 2988 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
cf805165
TM		 2989
2990 /* Handle Layoutreturn errors */
2991 if (calldata->arg.lr_args && task->tk_status != 0) {
2992 switch (calldata->res.lr_ret) {
2993 default:
2994 calldata->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
2995 break;
2996 case 0:
2997 calldata->arg.lr_args = NULL;
2998 calldata->res.lr_res = NULL;
2999 break;
3000 case -NFS4ERR_ADMIN_REVOKED:
3001 case -NFS4ERR_DELEG_REVOKED:
3002 case -NFS4ERR_EXPIRED:
3003 case -NFS4ERR_BAD_STATEID:
3004 case -NFS4ERR_OLD_STATEID:
3005 case -NFS4ERR_UNKNOWN_LAYOUTTYPE:
3006 case -NFS4ERR_WRONG_CRED:
3007 calldata->arg.lr_args = NULL;
3008 calldata->res.lr_res = NULL;
3009 calldata->res.lr_ret = 0;
3010 rpc_restart_call_prepare(task);
3011 return;
3012 }
3013 }
3014
d9b67e1e 3015 /* hmm. we are done with the inode, and in the process of freeing
1da177e4
LT		 3016 * the state_owner. we keep this around to process errors
3017 */
1da177e4
LT		 3018 switch (task->tk_status) {
3019 case 0:
412f6c4c 3020 res_stateid = &calldata->res.stateid;
26e976a8 3021 renew_lease(server, calldata->timestamp);
412f6c4c 3022 break;
f07d4a31
TM		 3023 case -NFS4ERR_ACCESS:
3024 if (calldata->arg.bitmask != NULL) {
3025 calldata->arg.bitmask = NULL;
3026 calldata->res.fattr = NULL;
3027 task->tk_status = 0;
3028 rpc_restart_call_prepare(task);
3029 goto out_release;
3030
3031 }
3032 break;
69794ad7 3033 case -NFS4ERR_ADMIN_REVOKED:
1da177e4 3034 case -NFS4ERR_STALE_STATEID:
26d36301
TM		 3035 case -NFS4ERR_EXPIRED:
3036 nfs4_free_revoked_stateid(server,
3037 &calldata->arg.stateid,
3038 task->tk_msg.rpc_cred);
9e33bed5
TM		 3039 case -NFS4ERR_OLD_STATEID:
3040 case -NFS4ERR_BAD_STATEID:
566fcec6 3041 if (!nfs4_stateid_match(&calldata->arg.stateid,
369d6b7f 3042 &state->open_stateid)) {
566fcec6
TM		 3043 rpc_restart_call_prepare(task);
3044 goto out_release;
3045 }
dc0b027d 3046 if (calldata->arg.fmode == 0)
9e33bed5 3047 break;
1da177e4 3048 default:
8478eaa1 3049 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN) {
72211dbe 3050 rpc_restart_call_prepare(task);
69794ad7
TM		 3051 goto out_release;
3052 }
1da177e4 3053 }
4a1e2feb
TM		 3054 nfs_clear_open_stateid(state, &calldata->arg.stateid,
3055 res_stateid, calldata->arg.fmode);
69794ad7 3056out_release:
72211dbe 3057 nfs_release_seqid(calldata->arg.seqid);
d8d84983 3058 nfs_refresh_inode(calldata->inode, &calldata->fattr);
a3ca5651 3059 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 3060}
3061
4ce70ada 3062static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 3063{
4ce70ada 3064 struct nfs4_closedata *calldata = data;
9512135d 3065 struct nfs4_state *state = calldata->state;
7fdab069 3066 struct inode *inode = calldata->inode;
aee7af35 3067 bool is_rdonly, is_wronly, is_rdwr;
88069f77 3068 int call_close = 0;
9512135d 3069
a3ca5651 3070 dprintk("%s: begin!\n", __func__);
963d8fe5 3071 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 3072 goto out_wait;
003707c7 3073
88069f77 3074 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
4cecb76f 3075 spin_lock(&state->owner->so_lock);
aee7af35
TM		 3076 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
3077 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
3078 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
369d6b7f 3079 nfs4_stateid_copy(&calldata->arg.stateid, &state->open_stateid);
003707c7 3080 /* Calculate the change in open mode */
cd9288ff 3081 calldata->arg.fmode = 0;
e7616923 3082 if (state->n_rdwr == 0) {
cd9288ff
TM		 3083 if (state->n_rdonly == 0)
3084 call_close |= is_rdonly;
3085 else if (is_rdonly)
3086 calldata->arg.fmode |= FMODE_READ;
3087 if (state->n_wronly == 0)
3088 call_close |= is_wronly;
3089 else if (is_wronly)
3090 calldata->arg.fmode |= FMODE_WRITE;
e547f262
TM		 3091 if (calldata->arg.fmode != (FMODE_READ|FMODE_WRITE))
3092 call_close |= is_rdwr;
cd9288ff
TM		 3093 } else if (is_rdwr)
3094 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
3095
5cc7861e
TM		 3096 if (!nfs4_valid_open_stateid(state) ||
3097 test_bit(NFS_OPEN_STATE, &state->flags) == 0)
5d422301 3098 call_close = 0;
4cecb76f 3099 spin_unlock(&state->owner->so_lock);
88069f77
TM		 3100
3101 if (!call_close) {
963d8fe5 3102 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 3103 goto out_no_action;
9512135d 3104 }
88069f77 3105
1c5bd76d 3106 if (!calldata->lr.roc && nfs4_wait_on_layoutreturn(inode, task)) {
500d701f
PT		 3107 nfs_release_seqid(calldata->arg.seqid);
3108 goto out_wait;
3109 }
3110
9413a1a1 3111 if (calldata->arg.fmode == 0)
88069f77 3112 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
3ecefc92 3113
9413a1a1 3114 if (calldata->arg.fmode == 0 || calldata->arg.fmode == FMODE_READ) {
3ecefc92
TM		 3115 /* Close-to-open cache consistency revalidation */
3116 if (!nfs4_have_delegation(inode, FMODE_READ))
3117 calldata->arg.bitmask = NFS_SERVER(inode)->cache_consistency_bitmask;
3118 else
3119 calldata->arg.bitmask = NULL;
3120 }
3c13cb5b 3121
6ae37339
TM		 3122 calldata->arg.share_access =
3123 nfs4_map_atomic_open_share(NFS_SERVER(inode),
3124 calldata->arg.fmode, 0);
88069f77 3125
d8d84983
TM		 3126 if (calldata->res.fattr == NULL)
3127 calldata->arg.bitmask = NULL;
3128 else if (calldata->arg.bitmask == NULL)
3129 calldata->res.fattr = NULL;
26e976a8 3130 calldata->timestamp = jiffies;
42e1cca7 3131 if (nfs4_setup_sequence(NFS_SERVER(inode)->nfs_client,
9d12b216
TM		 3132 &calldata->arg.seq_args,
3133 &calldata->res.seq_res,
2240a9e2
TM		 3134 task) != 0)
3135 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 3136 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 3137 return;
3138out_no_action:
3139 task->tk_action = NULL;
3140out_wait:
3141 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 3142}
3143
963d8fe5 3144static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 3145 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 3146 .rpc_call_done = nfs4_close_done,
3147 .rpc_release = nfs4_free_closedata,
3148};
3149
1da177e4
LT		 3150/*
3151 * It is possible for data to be read/written from a mem-mapped file
3152 * after the sys_close call (which hits the vfs layer as a flush).
3153 * This means that we can't safely call nfsv4 close on a file until
3154 * the inode is cleared. This in turn means that we are not good
3155 * NFSv4 citizens - we do not indicate to the server to update the file's
3156 * share state even when we are done with one of the three share
3157 * stateid's in the inode.
3158 *
3159 * NOTE: Caller must be holding the sp->so_owner semaphore!
3160 */
1f7977c1 3161int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 3162{
4a35bd41 3163 struct nfs_server *server = NFS_SERVER(state->inode);
63f5f796 3164 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
1da177e4 3165 struct nfs4_closedata *calldata;
b39e625b
TM		 3166 struct nfs4_state_owner *sp = state->owner;
3167 struct rpc_task *task;
5138fde0
TM		 3168 struct rpc_message msg = {
3169 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
3170 .rpc_cred = state->owner->so_cred,
3171 };
c970aa85
TM		 3172 struct rpc_task_setup task_setup_data = {
3173 .rpc_client = server->client,
5138fde0 3174 .rpc_message = &msg,
c970aa85 3175 .callback_ops = &nfs4_close_ops,
101070ca 3176 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3177 .flags = RPC_TASK_ASYNC,
3178 };
9512135d 3179 int status = -ENOMEM;
1da177e4 3180
fa940720
WAA		 3181 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
3182 &task_setup_data.rpc_client, &msg);
3183
8535b2be 3184 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 3185 if (calldata == NULL)
9512135d 3186 goto out;
a9c92d6b 3187 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 3188 calldata->inode = state->inode;
1da177e4 3189 calldata->state = state;
4a35bd41 3190 calldata->arg.fh = NFS_FH(state->inode);
1da177e4 3191 /* Serialization for the sequence id */
63f5f796
TM		 3192 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
3193 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask);
badc76dd 3194 if (IS_ERR(calldata->arg.seqid))
9512135d 3195 goto out_free_calldata;
d8d84983 3196 nfs_fattr_init(&calldata->fattr);
dc0b027d 3197 calldata->arg.fmode = 0;
4d796d75 3198 calldata->lr.arg.ld_private = &calldata->lr.ld_private;
516a6af6 3199 calldata->res.fattr = &calldata->fattr;
c1d51931 3200 calldata->res.seqid = calldata->arg.seqid;
516a6af6 3201 calldata->res.server = server;
cf805165 3202 calldata->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
1c5bd76d
TM		 3203 calldata->lr.roc = pnfs_roc(state->inode,
3204 &calldata->lr.arg, &calldata->lr.res, msg.rpc_cred);
3205 if (calldata->lr.roc) {
3206 calldata->arg.lr_args = &calldata->lr.arg;
3207 calldata->res.lr_res = &calldata->lr.res;
3208 }
643168c2 3209 nfs_sb_active(calldata->inode->i_sb);
9512135d 3210
1174dd1f
TM		 3211 msg.rpc_argp = &calldata->arg;
3212 msg.rpc_resp = &calldata->res;
c970aa85
TM		 3213 task_setup_data.callback_data = calldata;
3214 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 3215 if (IS_ERR(task))
3216 return PTR_ERR(task);
a49c3c77
TM		 3217 status = 0;
3218 if (wait)
3219 status = rpc_wait_for_completion_task(task);
b39e625b 3220 rpc_put_task(task);
a49c3c77 3221 return status;
9512135d
TM		 3222out_free_calldata:
3223 kfree(calldata);
3224out:
b39e625b
TM		 3225 nfs4_put_open_state(state);
3226 nfs4_put_state_owner(sp);
9512135d 3227 return status;
1da177e4
LT		 3228}
3229
2b484297 3230static struct inode *
5bc2afc2
TM		 3231nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
3232 int open_flags, struct iattr *attr, int *opened)
1da177e4 3233{
1da177e4 3234 struct nfs4_state *state;
aa9c2669
DQ		 3235 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
3236
3237 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
1da177e4 3238
565277f6 3239 /* Protect against concurrent sillydeletes */
5bc2afc2 3240 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
aa9c2669
DQ		 3241
3242 nfs4_label_release_security(label);
3243
f46e0bd3
TM		 3244 if (IS_ERR(state))
3245 return ERR_CAST(state);
275bb307 3246 return state->inode;
1da177e4
LT		 3247}
3248
1185a552 3249static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 3250{
3251 if (ctx->state == NULL)
3252 return;
3253 if (is_sync)
643168c2 3254 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 3255 else
643168c2 3256 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 3257}
1da177e4 3258
b944dba3
TM		 3259#define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
3260#define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
dff25ddb 3261#define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_MODE_UMASK - 1UL)
b944dba3 3262
1da177e4
LT		 3263static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
3264{
8c61282f 3265 u32 bitmask[3] = {}, minorversion = server->nfs_client->cl_minorversion;
43652ad5
BH		 3266 struct nfs4_server_caps_arg args = {
3267 .fhandle = fhandle,
8c61282f 3268 .bitmask = bitmask,
43652ad5 3269 };
1da177e4
LT		 3270 struct nfs4_server_caps_res res = {};
3271 struct rpc_message msg = {
3272 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 3273 .rpc_argp = &args,
1da177e4
LT		 3274 .rpc_resp = &res,
3275 };
3276 int status;
3277
8c61282f
KM		 3278 bitmask[0] = FATTR4_WORD0_SUPPORTED_ATTRS |
3279 FATTR4_WORD0_FH_EXPIRE_TYPE |
3280 FATTR4_WORD0_LINK_SUPPORT |
3281 FATTR4_WORD0_SYMLINK_SUPPORT |
3282 FATTR4_WORD0_ACLSUPPORT;
3283 if (minorversion)
3284 bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3285
7c513058 3286 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3287 if (status == 0) {
b944dba3 3288 /* Sanity check the server answers */
8c61282f 3289 switch (minorversion) {
b944dba3
TM		 3290 case 0:
3291 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
3292 res.attr_bitmask[2] = 0;
3293 break;
3294 case 1:
3295 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
3296 break;
3297 case 2:
3298 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
3299 }
1da177e4 3300 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 3301 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
3302 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
3303 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
3304 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
b944dba3
TM		 3305 NFS_CAP_CTIME|NFS_CAP_MTIME|
3306 NFS_CAP_SECURITY_LABEL);
7dd7d959
MN		 3307 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
3308 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
1da177e4
LT		 3309 server->caps |= NFS_CAP_ACLS;
3310 if (res.has_links != 0)
3311 server->caps |= NFS_CAP_HARDLINKS;
3312 if (res.has_symlinks != 0)
3313 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 3314 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
3315 server->caps |= NFS_CAP_FILEID;
3316 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
3317 server->caps |= NFS_CAP_MODE;
3318 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
3319 server->caps |= NFS_CAP_NLINK;
3320 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
3321 server->caps |= NFS_CAP_OWNER;
3322 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
3323 server->caps |= NFS_CAP_OWNER_GROUP;
3324 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
3325 server->caps |= NFS_CAP_ATIME;
3326 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
3327 server->caps |= NFS_CAP_CTIME;
3328 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
3329 server->caps |= NFS_CAP_MTIME;
aa9c2669
DQ		 3330#ifdef CONFIG_NFS_V4_SECURITY_LABEL
3331 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
3332 server->caps |= NFS_CAP_SECURITY_LABEL;
3333#endif
3334 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
3335 sizeof(server->attr_bitmask));
b944dba3 3336 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
62ab460c 3337
a65318bf
TM		 3338 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
3339 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
3340 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
b944dba3 3341 server->cache_consistency_bitmask[2] = 0;
8c61282f
KM		 3342 memcpy(server->exclcreat_bitmask, res.exclcreat_bitmask,
3343 sizeof(server->exclcreat_bitmask));
1da177e4 3344 server->acl_bitmask = res.acl_bitmask;
264e6351 3345 server->fh_expire_type = res.fh_expire_type;
1da177e4 3346 }
cccef3b9 3347
1da177e4
LT		 3348 return status;
3349}
3350
55a97593 3351int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 3352{
3353 struct nfs4_exception exception = { };
3354 int err;
3355 do {
3356 err = nfs4_handle_exception(server,
3357 _nfs4_server_capabilities(server, fhandle),
3358 &exception);
3359 } while (exception.retry);
3360 return err;
3361}
3362
3363static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3364 struct nfs_fsinfo *info)
3365{
aa9c2669 3366 u32 bitmask[3];
1da177e4 3367 struct nfs4_lookup_root_arg args = {
aa9c2669 3368 .bitmask = bitmask,
1da177e4
LT		 3369 };
3370 struct nfs4_lookup_res res = {
3371 .server = server,
0e574af1 3372 .fattr = info->fattr,
1da177e4
LT		 3373 .fh = fhandle,
3374 };
3375 struct rpc_message msg = {
3376 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
3377 .rpc_argp = &args,
3378 .rpc_resp = &res,
3379 };
008f55d0 3380
aa9c2669
DQ		 3381 bitmask[0] = nfs4_fattr_bitmap[0];
3382 bitmask[1] = nfs4_fattr_bitmap[1];
3383 /*
3384 * Process the label in the upcoming getfattr
3385 */
3386 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
3387
0e574af1 3388 nfs_fattr_init(info->fattr);
7c513058 3389 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3390}
3391
3392static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3393 struct nfs_fsinfo *info)
3394{
3395 struct nfs4_exception exception = { };
3396 int err;
3397 do {
fb8a5ba8 3398 err = _nfs4_lookup_root(server, fhandle, info);
b5f875a9 3399 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
fb8a5ba8
BS		 3400 switch (err) {
3401 case 0:
3402 case -NFS4ERR_WRONGSEC:
05e9cfb4 3403 goto out;
fb8a5ba8
BS		 3404 default:
3405 err = nfs4_handle_exception(server, err, &exception);
3406 }
1da177e4 3407 } while (exception.retry);
05e9cfb4 3408out:
1da177e4
LT		 3409 return err;
3410}
3411
8f70e95f
BS		 3412static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3413 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
3414{
c2190661
TM		 3415 struct rpc_auth_create_args auth_args = {
3416 .pseudoflavor = flavor,
3417 };
8f70e95f
BS		 3418 struct rpc_auth *auth;
3419 int ret;
3420
c2190661 3421 auth = rpcauth_create(&auth_args, server->client);
e8d920c5 3422 if (IS_ERR(auth)) {
75bc8821 3423 ret = -EACCES;
8f70e95f
BS		 3424 goto out;
3425 }
3426 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 3427out:
3428 return ret;
3429}
3430
9a744ba3
CL		 3431/*
3432 * Retry pseudoroot lookup with various security flavors. We do this when:
3433 *
3434 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
3435 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
3436 *
3437 * Returns zero on success, or a negative NFS4ERR value, or a
3438 * negative errno value.
3439 */
801a16dc 3440static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 3441 struct nfs_fsinfo *info)
1da177e4 3442{
9a744ba3
CL		 3443 /* Per 3530bis 15.33.5 */
3444 static const rpc_authflavor_t flav_array[] = {
3445 RPC_AUTH_GSS_KRB5P,
3446 RPC_AUTH_GSS_KRB5I,
3447 RPC_AUTH_GSS_KRB5,
c4eafe11 3448 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 3449 RPC_AUTH_NULL,
3450 };
3451 int status = -EPERM;
3452 size_t i;
6a1a1e34 3453
4d4b69dd
WAA		 3454 if (server->auth_info.flavor_len > 0) {
3455 /* try each flavor specified by user */
3456 for (i = 0; i < server->auth_info.flavor_len; i++) {
3457 status = nfs4_lookup_root_sec(server, fhandle, info,
3458 server->auth_info.flavors[i]);
3459 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3460 continue;
3461 break;
3462 }
3463 } else {
3464 /* no flavors specified by user, try default list */
3465 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3466 status = nfs4_lookup_root_sec(server, fhandle, info,
3467 flav_array[i]);
3468 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3469 continue;
3470 break;
3471 }
8f70e95f 3472 }
9a744ba3 3473
fb8a5ba8
BS		 3474 /*
3475 * -EACCESS could mean that the user doesn't have correct permissions
3476 * to access the mount. It could also mean that we tried to mount
3477 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
3478 * existing mount programs don't handle -EACCES very well so it should
3479 * be mapped to -EPERM instead.
3480 */
3481 if (status == -EACCES)
3482 status = -EPERM;
801a16dc
BS		 3483 return status;
3484}
3485
2ed4b95b
CL		 3486/**
3487 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
3488 * @server: initialized nfs_server handle
3489 * @fhandle: we fill in the pseudo-fs root file handle
3490 * @info: we fill in an FSINFO struct
5e6b1990 3491 * @auth_probe: probe the auth flavours
2ed4b95b
CL		 3492 *
3493 * Returns zero on success, or a negative errno.
801a16dc 3494 */
3028eb2b 3495int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
5e6b1990
TM		 3496 struct nfs_fsinfo *info,
3497 bool auth_probe)
801a16dc 3498{
c7757074 3499 int status = 0;
2ed4b95b 3500
c7757074 3501 if (!auth_probe)
5e6b1990 3502 status = nfs4_lookup_root(server, fhandle, info);
c7757074
AP		 3503
3504 if (auth_probe || status == NFS4ERR_WRONGSEC)
698c937b
TM		 3505 status = server->nfs_client->cl_mvops->find_root_sec(server,
3506 fhandle, info);
2ed4b95b 3507
1da177e4
LT		 3508 if (status == 0)
3509 status = nfs4_server_capabilities(server, fhandle);
3510 if (status == 0)
3511 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 3512
c12e87f4 3513 return nfs4_map_errors(status);
1da177e4
LT		 3514}
3515
bae36241
BS		 3516static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3517 struct nfs_fsinfo *info)
3518{
3519 int error;
3520 struct nfs_fattr *fattr = info->fattr;
1775fd3e 3521 struct nfs4_label *label = NULL;
bae36241
BS		 3522
3523 error = nfs4_server_capabilities(server, mntfh);
3524 if (error < 0) {
3525 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3526 return error;
3527 }
3528
14c43f76
DQ		 3529 label = nfs4_label_alloc(server, GFP_KERNEL);
3530 if (IS_ERR(label))
3531 return PTR_ERR(label);
3532
1775fd3e 3533 error = nfs4_proc_getattr(server, mntfh, fattr, label);
bae36241
BS		 3534 if (error < 0) {
3535 dprintk("nfs4_get_root: getattr error = %d\n", -error);
14c43f76 3536 goto err_free_label;
bae36241
BS		 3537 }
3538
3539 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3540 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3541 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3542
14c43f76
DQ		 3543err_free_label:
3544 nfs4_label_free(label);
3545
bae36241
BS		 3546 return error;
3547}
3548
6b97fd3d
MN		 3549/*
3550 * Get locations and (maybe) other attributes of a referral.
3551 * Note that we'll actually follow the referral later when
3552 * we detect fsid mismatch in inode revalidation
3553 */
f05d147f
BS		 3554static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3555 const struct qstr *name, struct nfs_fattr *fattr,
3556 struct nfs_fh *fhandle)
6b97fd3d
MN		 3557{
3558 int status = -ENOMEM;
3559 struct page *page = NULL;
3560 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 3561
3562 page = alloc_page(GFP_KERNEL);
3563 if (page == NULL)
3564 goto out;
3565 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3566 if (locations == NULL)
3567 goto out;
3568
f05d147f 3569 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 3570 if (status != 0)
3571 goto out;
519ae255
CL		 3572
3573 /*
3574 * If the fsid didn't change, this is a migration event, not a
3575 * referral. Cause us to drop into the exception handler, which
3576 * will kick off migration recovery.
3577 */
6b97fd3d 3578 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 3579 dprintk("%s: server did not return a different fsid for"
3580 " a referral at %s\n", __func__, name->name);
519ae255 3581 status = -NFS4ERR_MOVED;
6b97fd3d
MN		 3582 goto out;
3583 }
533eb461
AA		 3584 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3585 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 3586
533eb461 3587 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 3588 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 3589 memset(fhandle, 0, sizeof(struct nfs_fh));
3590out:
3591 if (page)
3592 __free_page(page);
5d7ca35a 3593 kfree(locations);
6b97fd3d
MN		 3594 return status;
3595}
3596
1775fd3e
DQ		 3597static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3598 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3599{
3600 struct nfs4_getattr_arg args = {
3601 .fh = fhandle,
3602 .bitmask = server->attr_bitmask,
3603 };
3604 struct nfs4_getattr_res res = {
3605 .fattr = fattr,
1775fd3e 3606 .label = label,
1da177e4
LT		 3607 .server = server,
3608 };
3609 struct rpc_message msg = {
3610 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3611 .rpc_argp = &args,
3612 .rpc_resp = &res,
3613 };
aa9c2669
DQ		 3614
3615 args.bitmask = nfs4_bitmask(server, label);
3616
0e574af1 3617 nfs_fattr_init(fattr);
7c513058 3618 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3619}
3620
1775fd3e
DQ		 3621static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3622 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3623{
3624 struct nfs4_exception exception = { };
3625 int err;
3626 do {
b5f875a9
TM		 3627 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3628 trace_nfs4_getattr(server, fhandle, fattr, err);
3629 err = nfs4_handle_exception(server, err,
1da177e4
LT		 3630 &exception);
3631 } while (exception.retry);
3632 return err;
3633}
3634
3635/*
3636 * The file is not closed if it is opened due to the a request to change
3637 * the size of the file. The open call will not be needed once the
3638 * VFS layer lookup-intents are implemented.
3639 *
3640 * Close is called when the inode is destroyed.
3641 * If we haven't opened the file for O_WRONLY, we
3642 * need to in the size_change case to obtain a stateid.
3643 *
3644 * Got race?
3645 * Because OPEN is always done by name in nfsv4, it is
3646 * possible that we opened a different file by the same
3647 * name. We can recognize this race condition, but we
3648 * can't do anything about it besides returning an error.
3649 *
3650 * This will be fixed with VFS changes (lookup-intent).
3651 */
3652static int
3653nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3654 struct iattr *sattr)
3655{
2b0143b5 3656 struct inode *inode = d_inode(dentry);
659bfcd6 3657 struct rpc_cred *cred = NULL;
29b59f94 3658 struct nfs_open_context *ctx = NULL;
14c43f76 3659 struct nfs4_label *label = NULL;
1da177e4
LT		 3660 int status;
3661
88ac815c
PT		 3662 if (pnfs_ld_layoutret_on_setattr(inode) &&
3663 sattr->ia_valid & ATTR_SIZE &&
3664 sattr->ia_size < i_size_read(inode))
24028672 3665 pnfs_commit_and_return_layout(inode);
8a1636c4 3666
0e574af1 3667 nfs_fattr_init(fattr);
1da177e4 3668
2669940d
AA		 3669 /* Deal with open(O_TRUNC) */
3670 if (sattr->ia_valid & ATTR_OPEN)
cc7936f9 3671 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2669940d
AA		 3672
3673 /* Optimization: if the end result is no change, don't RPC */
cc7936f9 3674 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2669940d
AA		 3675 return 0;
3676
d530838b 3677 /* Search for an existing open(O_WRITE) file */
659bfcd6 3678 if (sattr->ia_valid & ATTR_FILE) {
659bfcd6
TM		 3679
3680 ctx = nfs_file_open_context(sattr->ia_file);
29b59f94 3681 if (ctx)
504e5189 3682 cred = ctx->cred;
659bfcd6 3683 }
08e9eac4 3684
14c43f76
DQ		 3685 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3686 if (IS_ERR(label))
3687 return PTR_ERR(label);
3688
29b59f94 3689 status = nfs4_do_setattr(inode, cred, fattr, sattr, ctx, NULL, label);
aa9c2669 3690 if (status == 0) {
f044636d 3691 nfs_setattr_update_inode(inode, sattr, fattr);
aa9c2669
DQ		 3692 nfs_setsecurity(inode, fattr, label);
3693 }
14c43f76 3694 nfs4_label_free(label);
1da177e4
LT		 3695 return status;
3696}
3697
0c2e53f1
TM		 3698static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3699 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3700 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 3701{
0c2e53f1 3702 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 3703 int status;
3704 struct nfs4_lookup_arg args = {
3705 .bitmask = server->attr_bitmask,
0c2e53f1 3706 .dir_fh = NFS_FH(dir),
2b3de441
DH		 3707 .name = name,
3708 };
3709 struct nfs4_lookup_res res = {
3710 .server = server,
3711 .fattr = fattr,
aa9c2669 3712 .label = label,
2b3de441
DH		 3713 .fh = fhandle,
3714 };
3715 struct rpc_message msg = {
3716 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3717 .rpc_argp = &args,
3718 .rpc_resp = &res,
3719 };
3720
aa9c2669
DQ		 3721 args.bitmask = nfs4_bitmask(server, label);
3722
2b3de441
DH		 3723 nfs_fattr_init(fattr);
3724
1da177e4 3725 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 3726 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3727 dprintk("NFS reply lookup: %d\n", status);
3728 return status;
3729}
3730
72de53ec 3731static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 3732{
7ebb9315 3733 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 3734 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 3735 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3736 fattr->nlink = 2;
3737}
3738
72de53ec 3739static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
beffb8fe 3740 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3741 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3742{
3743 struct nfs4_exception exception = { };
72de53ec 3744 struct rpc_clnt *client = *clnt;
1da177e4
LT		 3745 int err;
3746 do {
1775fd3e 3747 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
078ea3df 3748 trace_nfs4_lookup(dir, name, err);
72de53ec 3749 switch (err) {
08ef7bd3 3750 case -NFS4ERR_BADNAME:
72de53ec
BS		 3751 err = -ENOENT;
3752 goto out;
0c2e53f1 3753 case -NFS4ERR_MOVED:
f05d147f 3754 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
c86c90c6
DM		 3755 if (err == -NFS4ERR_MOVED)
3756 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
72de53ec 3757 goto out;
0c2e53f1 3758 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 3759 err = -EPERM;
3760 if (client != *clnt)
3761 goto out;
66b06860 3762 client = nfs4_negotiate_security(client, dir, name);
72de53ec
BS		 3763 if (IS_ERR(client))
3764 return PTR_ERR(client);
3765
3766 exception.retry = 1;
3767 break;
3768 default:
3769 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 3770 }
1da177e4 3771 } while (exception.retry);
72de53ec
BS		 3772
3773out:
3774 if (err == 0)
3775 *clnt = client;
3776 else if (client != *clnt)
3777 rpc_shutdown_client(client);
3778
1da177e4
LT		 3779 return err;
3780}
3781
beffb8fe 3782static int nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1775fd3e
DQ		 3783 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3784 struct nfs4_label *label)
72de53ec
BS		 3785{
3786 int status;
3787 struct rpc_clnt *client = NFS_CLIENT(dir);
3788
1775fd3e 3789 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
72de53ec
BS		 3790 if (client != NFS_CLIENT(dir)) {
3791 rpc_shutdown_client(client);
3792 nfs_fixup_secinfo_attributes(fattr);
3793 }
3794 return status;
3795}
3796
f05d147f 3797struct rpc_clnt *
beffb8fe 3798nfs4_proc_lookup_mountpoint(struct inode *dir, const struct qstr *name,
f05d147f
BS		 3799 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3800{
b72888cb 3801 struct rpc_clnt *client = NFS_CLIENT(dir);
f05d147f 3802 int status;
f05d147f 3803
1775fd3e 3804 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
b72888cb 3805 if (status < 0)
f05d147f 3806 return ERR_PTR(status);
b72888cb 3807 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
f05d147f
BS		 3808}
3809
1da177e4
LT		 3810static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3811{
76b32999 3812 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3813 struct nfs4_accessargs args = {
3814 .fh = NFS_FH(inode),
a4980e78 3815 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 3816 };
3817 struct nfs4_accessres res = {
3818 .server = server,
1da177e4 3819 };
1da177e4
LT		 3820 struct rpc_message msg = {
3821 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3822 .rpc_argp = &args,
3823 .rpc_resp = &res,
3824 .rpc_cred = entry->cred,
3825 };
3826 int mode = entry->mask;
aa9c2669 3827 int status = 0;
1da177e4
LT		 3828
3829 /*
3830 * Determine which access bits we want to ask for...
3831 */
3832 if (mode & MAY_READ)
3833 args.access |= NFS4_ACCESS_READ;
3834 if (S_ISDIR(inode->i_mode)) {
3835 if (mode & MAY_WRITE)
3836 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3837 if (mode & MAY_EXEC)
3838 args.access |= NFS4_ACCESS_LOOKUP;
3839 } else {
3840 if (mode & MAY_WRITE)
3841 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3842 if (mode & MAY_EXEC)
3843 args.access |= NFS4_ACCESS_EXECUTE;
3844 }
c407d41a
TM		 3845
3846 res.fattr = nfs_alloc_fattr();
3847 if (res.fattr == NULL)
3848 return -ENOMEM;
3849
7c513058 3850 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3851 if (!status) {
6168f62c 3852 nfs_access_set_mask(entry, res.access);
c407d41a 3853 nfs_refresh_inode(inode, res.fattr);
1da177e4 3854 }
c407d41a 3855 nfs_free_fattr(res.fattr);
1da177e4
LT		 3856 return status;
3857}
3858
3859static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3860{
3861 struct nfs4_exception exception = { };
3862 int err;
3863 do {
c1578b76
TM		 3864 err = _nfs4_proc_access(inode, entry);
3865 trace_nfs4_access(inode, err);
3866 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3867 &exception);
3868 } while (exception.retry);
3869 return err;
3870}
3871
3872/*
3873 * TODO: For the time being, we don't try to get any attributes
3874 * along with any of the zero-copy operations READ, READDIR,
3875 * READLINK, WRITE.
3876 *
3877 * In the case of the first three, we want to put the GETATTR
3878 * after the read-type operation -- this is because it is hard
3879 * to predict the length of a GETATTR response in v4, and thus
3880 * align the READ data correctly. This means that the GETATTR
3881 * may end up partially falling into the page cache, and we should
3882 * shift it into the 'tail' of the xdr_buf before processing.
3883 * To do this efficiently, we need to know the total length
3884 * of data received, which doesn't seem to be available outside
3885 * of the RPC layer.
3886 *
3887 * In the case of WRITE, we also want to put the GETATTR after
3888 * the operation -- in this case because we want to make sure
140150db 3889 * we get the post-operation mtime and size.
1da177e4
LT		 3890 *
3891 * Both of these changes to the XDR layer would in fact be quite
3892 * minor, but I decided to leave them for a subsequent patch.
3893 */
3894static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3895 unsigned int pgbase, unsigned int pglen)
3896{
3897 struct nfs4_readlink args = {
3898 .fh = NFS_FH(inode),
3899 .pgbase = pgbase,
3900 .pglen = pglen,
3901 .pages = &page,
3902 };
f50c7000 3903 struct nfs4_readlink_res res;
1da177e4
LT		 3904 struct rpc_message msg = {
3905 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3906 .rpc_argp = &args,
f50c7000 3907 .rpc_resp = &res,
1da177e4
LT		 3908 };
3909
7c513058 3910 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3911}
3912
3913static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3914 unsigned int pgbase, unsigned int pglen)
3915{
3916 struct nfs4_exception exception = { };
3917 int err;
3918 do {
c1578b76
TM		 3919 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3920 trace_nfs4_readlink(inode, err);
3921 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3922 &exception);
3923 } while (exception.retry);
3924 return err;
3925}
3926
1da177e4 3927/*
8867fe58 3928 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3929 */
1da177e4
LT		 3930static int
3931nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3932 int flags)
1da177e4 3933{
dff25ddb 3934 struct nfs_server *server = NFS_SERVER(dir);
aa9c2669 3935 struct nfs4_label l, *ilabel = NULL;
8867fe58 3936 struct nfs_open_context *ctx;
1da177e4 3937 struct nfs4_state *state;
1da177e4
LT		 3938 int status = 0;
3939
532d4def 3940 ctx = alloc_nfs_open_context(dentry, FMODE_READ, NULL);
8867fe58
MS		 3941 if (IS_ERR(ctx))
3942 return PTR_ERR(ctx);
3943
aa9c2669
DQ		 3944 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3945
dff25ddb
AG		 3946 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
3947 sattr->ia_mode &= ~current_umask();
c5c3fb5f 3948 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, NULL);
1da177e4
LT		 3949 if (IS_ERR(state)) {
3950 status = PTR_ERR(state);
c0204fd2 3951 goto out;
1da177e4 3952 }
1da177e4 3953out:
aa9c2669 3954 nfs4_label_release_security(ilabel);
8867fe58 3955 put_nfs_open_context(ctx);
1da177e4
LT		 3956 return status;
3957}
3958
beffb8fe 3959static int _nfs4_proc_remove(struct inode *dir, const struct qstr *name)
1da177e4 3960{
16e42959 3961 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3962 struct nfs_removeargs args = {
1da177e4 3963 .fh = NFS_FH(dir),
26fe5750 3964 .name = *name,
16e42959 3965 };
4fdc17b2 3966 struct nfs_removeres res = {
16e42959 3967 .server = server,
1da177e4 3968 };
1da177e4 3969 struct rpc_message msg = {
4fdc17b2
TM		 3970 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3971 .rpc_argp = &args,
3972 .rpc_resp = &res,
1da177e4 3973 };
d3129ef6 3974 unsigned long timestamp = jiffies;
778d2817 3975 int status;
1da177e4 3976
7c513058 3977 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3978 if (status == 0)
d3129ef6 3979 update_changeattr(dir, &res.cinfo, timestamp);
1da177e4
LT		 3980 return status;
3981}
3982
beffb8fe 3983static int nfs4_proc_remove(struct inode *dir, const struct qstr *name)
1da177e4
LT		 3984{
3985 struct nfs4_exception exception = { };
3986 int err;
3987 do {
078ea3df
TM		 3988 err = _nfs4_proc_remove(dir, name);
3989 trace_nfs4_remove(dir, name, err);
3990 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3991 &exception);
3992 } while (exception.retry);
3993 return err;
3994}
3995
e4eff1a6 3996static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3997{
e4eff1a6
TM		 3998 struct nfs_server *server = NFS_SERVER(dir);
3999 struct nfs_removeargs *args = msg->rpc_argp;
4000 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 4001
e4eff1a6 4002 res->server = server;
1da177e4 4003 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
a9c92d6b 4004 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
aa9c2669
DQ		 4005
4006 nfs_fattr_init(res->dir_attr);
1da177e4
LT		 4007}
4008
34e137cc
BS		 4009static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
4010{
42e1cca7 4011 nfs4_setup_sequence(NFS_SB(data->dentry->d_sb)->nfs_client,
d9afbd1b
TM		 4012 &data->args.seq_args,
4013 &data->res.seq_res,
4014 task);
1da177e4
LT		 4015}
4016
e4eff1a6 4017static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 4018{
078ea3df
TM		 4019 struct nfs_unlinkdata *data = task->tk_calldata;
4020 struct nfs_removeres *res = &data->res;
e4eff1a6 4021
14516c3a
TM		 4022 if (!nfs4_sequence_done(task, &res->seq_res))
4023 return 0;
8478eaa1
N		 4024 if (nfs4_async_handle_error(task, res->server, NULL,
4025 &data->timeout) == -EAGAIN)
e4eff1a6 4026 return 0;
c40d52fe 4027 if (task->tk_status == 0)
d3129ef6 4028 update_changeattr(dir, &res->cinfo, res->dir_attr->time_start);
e4eff1a6 4029 return 1;
1da177e4
LT		 4030}
4031
d3d4152a
JL		 4032static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
4033{
4034 struct nfs_server *server = NFS_SERVER(dir);
4035 struct nfs_renameargs *arg = msg->rpc_argp;
4036 struct nfs_renameres *res = msg->rpc_resp;
4037
4038 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 4039 res->server = server;
a9c92d6b 4040 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 4041}
4042
c6bfa1a1
BS		 4043static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
4044{
42e1cca7 4045 nfs4_setup_sequence(NFS_SERVER(data->old_dir)->nfs_client,
d9afbd1b
TM		 4046 &data->args.seq_args,
4047 &data->res.seq_res,
4048 task);
d3d4152a
JL		 4049}
4050
4051static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
4052 struct inode *new_dir)
4053{
fbc6f7c2
TM		 4054 struct nfs_renamedata *data = task->tk_calldata;
4055 struct nfs_renameres *res = &data->res;
d3d4152a
JL		 4056
4057 if (!nfs4_sequence_done(task, &res->seq_res))
4058 return 0;
8478eaa1 4059 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
d3d4152a
JL		 4060 return 0;
4061
c733c49c 4062 if (task->tk_status == 0) {
d3129ef6 4063 update_changeattr(old_dir, &res->old_cinfo, res->old_fattr->time_start);
c733c49c 4064 if (new_dir != old_dir)
d3129ef6 4065 update_changeattr(new_dir, &res->new_cinfo, res->new_fattr->time_start);
c733c49c 4066 }
d3d4152a
JL		 4067 return 1;
4068}
4069
beffb8fe 4070static int _nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name)
1da177e4 4071{
91ba2eee 4072 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 4073 struct nfs4_link_arg arg = {
4074 .fh = NFS_FH(inode),
4075 .dir_fh = NFS_FH(dir),
4076 .name = name,
91ba2eee
TM		 4077 .bitmask = server->attr_bitmask,
4078 };
91ba2eee
TM		 4079 struct nfs4_link_res res = {
4080 .server = server,
1775fd3e 4081 .label = NULL,
1da177e4 4082 };
1da177e4
LT		 4083 struct rpc_message msg = {
4084 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
4085 .rpc_argp = &arg,
91ba2eee 4086 .rpc_resp = &res,
1da177e4 4087 };
136f2627
TM		 4088 int status = -ENOMEM;
4089
4090 res.fattr = nfs_alloc_fattr();
778d2817 4091 if (res.fattr == NULL)
136f2627 4092 goto out;
1da177e4 4093
14c43f76
DQ		 4094 res.label = nfs4_label_alloc(server, GFP_KERNEL);
4095 if (IS_ERR(res.label)) {
4096 status = PTR_ERR(res.label);
4097 goto out;
4098 }
aa9c2669 4099 arg.bitmask = nfs4_bitmask(server, res.label);
14c43f76 4100
7c513058 4101 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee 4102 if (!status) {
d3129ef6 4103 update_changeattr(dir, &res.cinfo, res.fattr->time_start);
aa9c2669
DQ		 4104 status = nfs_post_op_update_inode(inode, res.fattr);
4105 if (!status)
4106 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 4107 }
14c43f76
DQ		 4108
4109
4110 nfs4_label_free(res.label);
4111
136f2627 4112out:
136f2627 4113 nfs_free_fattr(res.fattr);
1da177e4
LT		 4114 return status;
4115}
4116
beffb8fe 4117static int nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name)
1da177e4
LT		 4118{
4119 struct nfs4_exception exception = { };
4120 int err;
4121 do {
4122 err = nfs4_handle_exception(NFS_SERVER(inode),
4123 _nfs4_proc_link(inode, dir, name),
4124 &exception);
4125 } while (exception.retry);
4126 return err;
4127}
4128
57dc9a57
TM		 4129struct nfs4_createdata {
4130 struct rpc_message msg;
4131 struct nfs4_create_arg arg;
4132 struct nfs4_create_res res;
4133 struct nfs_fh fh;
4134 struct nfs_fattr fattr;
1775fd3e 4135 struct nfs4_label *label;
57dc9a57
TM		 4136};
4137
4138static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
beffb8fe 4139 const struct qstr *name, struct iattr *sattr, u32 ftype)
57dc9a57
TM		 4140{
4141 struct nfs4_createdata *data;
4142
4143 data = kzalloc(sizeof(*data), GFP_KERNEL);
4144 if (data != NULL) {
4145 struct nfs_server *server = NFS_SERVER(dir);
4146
14c43f76
DQ		 4147 data->label = nfs4_label_alloc(server, GFP_KERNEL);
4148 if (IS_ERR(data->label))
4149 goto out_free;
4150
57dc9a57
TM		 4151 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
4152 data->msg.rpc_argp = &data->arg;
4153 data->msg.rpc_resp = &data->res;
4154 data->arg.dir_fh = NFS_FH(dir);
4155 data->arg.server = server;
4156 data->arg.name = name;
4157 data->arg.attrs = sattr;
4158 data->arg.ftype = ftype;
aa9c2669 4159 data->arg.bitmask = nfs4_bitmask(server, data->label);
dff25ddb 4160 data->arg.umask = current_umask();
57dc9a57
TM		 4161 data->res.server = server;
4162 data->res.fh = &data->fh;
4163 data->res.fattr = &data->fattr;
1775fd3e 4164 data->res.label = data->label;
57dc9a57 4165 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 4166 }
4167 return data;
14c43f76
DQ		 4168out_free:
4169 kfree(data);
4170 return NULL;
57dc9a57
TM		 4171}
4172
4173static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
4174{
7c513058 4175 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 4176 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57 4177 if (status == 0) {
d3129ef6
TM		 4178 update_changeattr(dir, &data->res.dir_cinfo,
4179 data->res.fattr->time_start);
1775fd3e 4180 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 4181 }
4182 return status;
4183}
4184
4185static void nfs4_free_createdata(struct nfs4_createdata *data)
4186{
14c43f76 4187 nfs4_label_free(data->label);
57dc9a57
TM		 4188 kfree(data);
4189}
4190
4f390c15 4191static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 4192 struct page *page, unsigned int len, struct iattr *sattr,
4193 struct nfs4_label *label)
1da177e4 4194{
57dc9a57
TM		 4195 struct nfs4_createdata *data;
4196 int status = -ENAMETOOLONG;
1da177e4 4197
94a6d753 4198 if (len > NFS4_MAXPATHLEN)
57dc9a57 4199 goto out;
4f390c15 4200
57dc9a57
TM		 4201 status = -ENOMEM;
4202 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
4203 if (data == NULL)
4204 goto out;
4205
4206 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
4207 data->arg.u.symlink.pages = &page;
4208 data->arg.u.symlink.len = len;
1775fd3e 4209 data->arg.label = label;
1da177e4 4210
57dc9a57
TM		 4211 status = nfs4_do_create(dir, dentry, data);
4212
4213 nfs4_free_createdata(data);
4214out:
1da177e4
LT		 4215 return status;
4216}
4217
4f390c15 4218static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 4219 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 4220{
4221 struct nfs4_exception exception = { };
aa9c2669 4222 struct nfs4_label l, *label = NULL;
1da177e4 4223 int err;
aa9c2669
DQ		 4224
4225 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4226
1da177e4 4227 do {
078ea3df
TM		 4228 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
4229 trace_nfs4_symlink(dir, &dentry->d_name, err);
4230 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4231 &exception);
4232 } while (exception.retry);
aa9c2669
DQ		 4233
4234 nfs4_label_release_security(label);
1da177e4
LT		 4235 return err;
4236}
4237
4238static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 4239 struct iattr *sattr, struct nfs4_label *label)
1da177e4 4240{
57dc9a57
TM		 4241 struct nfs4_createdata *data;
4242 int status = -ENOMEM;
1da177e4 4243
57dc9a57
TM		 4244 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
4245 if (data == NULL)
4246 goto out;
4247
1775fd3e 4248 data->arg.label = label;
57dc9a57
TM		 4249 status = nfs4_do_create(dir, dentry, data);
4250
4251 nfs4_free_createdata(data);
4252out:
1da177e4
LT		 4253 return status;
4254}
4255
4256static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
4257 struct iattr *sattr)
4258{
dff25ddb 4259 struct nfs_server *server = NFS_SERVER(dir);
1da177e4 4260 struct nfs4_exception exception = { };
aa9c2669 4261 struct nfs4_label l, *label = NULL;
1da177e4 4262 int err;
a8a5da99 4263
aa9c2669
DQ		 4264 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4265
dff25ddb
AG		 4266 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
4267 sattr->ia_mode &= ~current_umask();
1da177e4 4268 do {
078ea3df
TM		 4269 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
4270 trace_nfs4_mkdir(dir, &dentry->d_name, err);
4271 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4272 &exception);
4273 } while (exception.retry);
aa9c2669
DQ		 4274 nfs4_label_release_security(label);
4275
1da177e4
LT		 4276 return err;
4277}
4278
4279static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 4280 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4 4281{
2b0143b5 4282 struct inode *dir = d_inode(dentry);
1da177e4
LT		 4283 struct nfs4_readdir_arg args = {
4284 .fh = NFS_FH(dir),
56e4ebf8 4285 .pages = pages,
1da177e4
LT		 4286 .pgbase = 0,
4287 .count = count,
2b0143b5 4288 .bitmask = NFS_SERVER(d_inode(dentry))->attr_bitmask,
82f2e547 4289 .plus = plus,
1da177e4
LT		 4290 };
4291 struct nfs4_readdir_res res;
4292 struct rpc_message msg = {
4293 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
4294 .rpc_argp = &args,
4295 .rpc_resp = &res,
4296 .rpc_cred = cred,
4297 };
4298 int status;
4299
6de1472f
AV		 4300 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
4301 dentry,
eadf4598 4302 (unsigned long long)cookie);
c3f52af3 4303 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 4304 res.pgbase = args.pgbase;
7c513058 4305 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 4306 if (status >= 0) {
c3f52af3 4307 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 4308 status += args.pgbase;
4309 }
c4812998
TM		 4310
4311 nfs_invalidate_atime(dir);
4312
3110ff80 4313 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 4314 return status;
4315}
4316
4317static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 4318 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 4319{
4320 struct nfs4_exception exception = { };
4321 int err;
4322 do {
c1578b76
TM		 4323 err = _nfs4_proc_readdir(dentry, cred, cookie,
4324 pages, count, plus);
2b0143b5
DH		 4325 trace_nfs4_readdir(d_inode(dentry), err);
4326 err = nfs4_handle_exception(NFS_SERVER(d_inode(dentry)), err,
1da177e4
LT		 4327 &exception);
4328 } while (exception.retry);
4329 return err;
4330}
4331
4332static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 4333 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 4334{
57dc9a57
TM		 4335 struct nfs4_createdata *data;
4336 int mode = sattr->ia_mode;
4337 int status = -ENOMEM;
1da177e4 4338
57dc9a57
TM		 4339 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
4340 if (data == NULL)
4341 goto out;
4342
1da177e4 4343 if (S_ISFIFO(mode))
57dc9a57 4344 data->arg.ftype = NF4FIFO;
1da177e4 4345 else if (S_ISBLK(mode)) {
57dc9a57
TM		 4346 data->arg.ftype = NF4BLK;
4347 data->arg.u.device.specdata1 = MAJOR(rdev);
4348 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 4349 }
4350 else if (S_ISCHR(mode)) {
57dc9a57
TM		 4351 data->arg.ftype = NF4CHR;
4352 data->arg.u.device.specdata1 = MAJOR(rdev);
4353 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 4354 } else if (!S_ISSOCK(mode)) {
4355 status = -EINVAL;
4356 goto out_free;
1da177e4 4357 }
1775fd3e 4358
aa9c2669 4359 data->arg.label = label;
57dc9a57 4360 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 4361out_free:
57dc9a57
TM		 4362 nfs4_free_createdata(data);
4363out:
1da177e4
LT		 4364 return status;
4365}
4366
4367static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
4368 struct iattr *sattr, dev_t rdev)
4369{
dff25ddb 4370 struct nfs_server *server = NFS_SERVER(dir);
1da177e4 4371 struct nfs4_exception exception = { };
aa9c2669 4372 struct nfs4_label l, *label = NULL;
1da177e4 4373 int err;
a8a5da99 4374
aa9c2669
DQ		 4375 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4376
dff25ddb
AG		 4377 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
4378 sattr->ia_mode &= ~current_umask();
1da177e4 4379 do {
078ea3df
TM		 4380 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
4381 trace_nfs4_mknod(dir, &dentry->d_name, err);
4382 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4383 &exception);
4384 } while (exception.retry);
aa9c2669
DQ		 4385
4386 nfs4_label_release_security(label);
4387
1da177e4
LT		 4388 return err;
4389}
4390
4391static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
4392 struct nfs_fsstat *fsstat)
4393{
4394 struct nfs4_statfs_arg args = {
4395 .fh = fhandle,
4396 .bitmask = server->attr_bitmask,
4397 };
24ad148a
BH		 4398 struct nfs4_statfs_res res = {
4399 .fsstat = fsstat,
4400 };
1da177e4
LT		 4401 struct rpc_message msg = {
4402 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
4403 .rpc_argp = &args,
24ad148a 4404 .rpc_resp = &res,
1da177e4
LT		 4405 };
4406
0e574af1 4407 nfs_fattr_init(fsstat->fattr);
7c513058 4408 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4409}
4410
4411static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
4412{
4413 struct nfs4_exception exception = { };
4414 int err;
4415 do {
4416 err = nfs4_handle_exception(server,
4417 _nfs4_proc_statfs(server, fhandle, fsstat),
4418 &exception);
4419 } while (exception.retry);
4420 return err;
4421}
4422
4423static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
4424 struct nfs_fsinfo *fsinfo)
4425{
4426 struct nfs4_fsinfo_arg args = {
4427 .fh = fhandle,
4428 .bitmask = server->attr_bitmask,
4429 };
3dda5e43
BH		 4430 struct nfs4_fsinfo_res res = {
4431 .fsinfo = fsinfo,
4432 };
1da177e4
LT		 4433 struct rpc_message msg = {
4434 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
4435 .rpc_argp = &args,
3dda5e43 4436 .rpc_resp = &res,
1da177e4
LT		 4437 };
4438
7c513058 4439 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4440}
4441
4442static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4443{
4444 struct nfs4_exception exception = { };
83ca7f5a 4445 unsigned long now = jiffies;
1da177e4
LT		 4446 int err;
4447
4448 do {
83ca7f5a 4449 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
b5f875a9 4450 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
83ca7f5a 4451 if (err == 0) {
fb10fb67
TM		 4452 nfs4_set_lease_period(server->nfs_client,
4453 fsinfo->lease_time * HZ,
4454 now);
83ca7f5a
CL		 4455 break;
4456 }
4457 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 4458 } while (exception.retry);
4459 return err;
4460}
4461
4462static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4463{
e38eb650
BS		 4464 int error;
4465
0e574af1 4466 nfs_fattr_init(fsinfo->fattr);
e38eb650 4467 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 4468 if (error == 0) {
4469 /* block layout checks this! */
4470 server->pnfs_blksize = fsinfo->blksize;
ca440c38 4471 set_pnfs_layoutdriver(server, fhandle, fsinfo);
dc182549 4472 }
e38eb650
BS		 4473
4474 return error;
1da177e4
LT		 4475}
4476
4477static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4478 struct nfs_pathconf *pathconf)
4479{
4480 struct nfs4_pathconf_arg args = {
4481 .fh = fhandle,
4482 .bitmask = server->attr_bitmask,
4483 };
d45b2989
BH		 4484 struct nfs4_pathconf_res res = {
4485 .pathconf = pathconf,
4486 };
1da177e4
LT		 4487 struct rpc_message msg = {
4488 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
4489 .rpc_argp = &args,
d45b2989 4490 .rpc_resp = &res,
1da177e4
LT		 4491 };
4492
4493 /* None of the pathconf attributes are mandatory to implement */
4494 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
4495 memset(pathconf, 0, sizeof(*pathconf));
4496 return 0;
4497 }
4498
0e574af1 4499 nfs_fattr_init(pathconf->fattr);
7c513058 4500 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4501}
4502
4503static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4504 struct nfs_pathconf *pathconf)
4505{
4506 struct nfs4_exception exception = { };
4507 int err;
4508
4509 do {
4510 err = nfs4_handle_exception(server,
4511 _nfs4_proc_pathconf(server, fhandle, pathconf),
4512 &exception);
4513 } while (exception.retry);
4514 return err;
4515}
4516
5521abfd 4517int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 4518 const struct nfs_open_context *ctx,
4519 const struct nfs_lock_context *l_ctx,
4520 fmode_t fmode)
4521{
17393475 4522 return nfs4_select_rw_stateid(ctx->state, fmode, l_ctx, stateid, NULL);
9b206149
TM		 4523}
4524EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4525
5521abfd
TM		 4526static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4527 const struct nfs_open_context *ctx,
4528 const struct nfs_lock_context *l_ctx,
4529 fmode_t fmode)
4530{
4531 nfs4_stateid current_stateid;
4532
e1253be0
TM		 4533 /* If the current stateid represents a lost lock, then exit */
4534 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode) == -EIO)
4535 return true;
5521abfd
TM		 4536 return nfs4_stateid_match(stateid, &current_stateid);
4537}
4538
4539static bool nfs4_error_stateid_expired(int err)
4540{
4541 switch (err) {
4542 case -NFS4ERR_DELEG_REVOKED:
4543 case -NFS4ERR_ADMIN_REVOKED:
4544 case -NFS4ERR_BAD_STATEID:
4545 case -NFS4ERR_STALE_STATEID:
4546 case -NFS4ERR_OLD_STATEID:
4547 case -NFS4ERR_OPENMODE:
4548 case -NFS4ERR_EXPIRED:
4549 return true;
4550 }
4551 return false;
4552}
4553
d45f60c6 4554static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
1da177e4 4555{
d45f60c6 4556 struct nfs_server *server = NFS_SERVER(hdr->inode);
1da177e4 4557
d45f60c6 4558 trace_nfs4_read(hdr, task->tk_status);
9c27869d
TM		 4559 if (task->tk_status < 0) {
4560 struct nfs4_exception exception = {
4561 .inode = hdr->inode,
4562 .state = hdr->args.context->state,
4563 .stateid = &hdr->args.stateid,
4564 };
4565 task->tk_status = nfs4_async_handle_exception(task,
4566 server, task->tk_status, &exception);
4567 if (exception.retry) {
4568 rpc_restart_call_prepare(task);
4569 return -EAGAIN;
4570 }
1da177e4 4571 }
8850df99 4572
1da177e4 4573 if (task->tk_status > 0)
d45f60c6 4574 renew_lease(server, hdr->timestamp);
ec06c096 4575 return 0;
1da177e4
LT		 4576}
4577
5521abfd 4578static bool nfs4_read_stateid_changed(struct rpc_task *task,
3c6b899c 4579 struct nfs_pgio_args *args)
5521abfd
TM		 4580{
4581
4582 if (!nfs4_error_stateid_expired(task->tk_status) ||
4583 nfs4_stateid_is_current(&args->stateid,
4584 args->context,
4585 args->lock_context,
4586 FMODE_READ))
4587 return false;
4588 rpc_restart_call_prepare(task);
4589 return true;
4590}
4591
d45f60c6 4592static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
cbdabc7f
AA		 4593{
4594
4595 dprintk("--> %s\n", __func__);
4596
d45f60c6 4597 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
cbdabc7f 4598 return -EAGAIN;
d45f60c6 4599 if (nfs4_read_stateid_changed(task, &hdr->args))
5521abfd 4600 return -EAGAIN;
bfc505de
TM		 4601 if (task->tk_status > 0)
4602 nfs_invalidate_atime(hdr->inode);
d45f60c6
WAA		 4603 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4604 nfs4_read_done_cb(task, hdr);
cbdabc7f
AA		 4605}
4606
d45f60c6
WAA		 4607static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
4608 struct rpc_message *msg)
1da177e4 4609{
d45f60c6 4610 hdr->timestamp = jiffies;
ca857cc1
TM		 4611 if (!hdr->pgio_done_cb)
4612 hdr->pgio_done_cb = nfs4_read_done_cb;
bdc7f021 4613 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
d45f60c6 4614 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
1da177e4
LT		 4615}
4616
d45f60c6
WAA		 4617static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
4618 struct nfs_pgio_header *hdr)
ea7c3303 4619{
42e1cca7 4620 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode)->nfs_client,
d45f60c6
WAA		 4621 &hdr->args.seq_args,
4622 &hdr->res.seq_res,
9b206149 4623 task))
ef1820f9 4624 return 0;
d45f60c6
WAA		 4625 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
4626 hdr->args.lock_context,
4627 hdr->rw_ops->rw_mode) == -EIO)
ef1820f9 4628 return -EIO;
d45f60c6 4629 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
ef1820f9
N		 4630 return -EIO;
4631 return 0;
1da177e4
LT		 4632}
4633
d45f60c6
WAA		 4634static int nfs4_write_done_cb(struct rpc_task *task,
4635 struct nfs_pgio_header *hdr)
1da177e4 4636{
d45f60c6 4637 struct inode *inode = hdr->inode;
8478eaa1 4638
d45f60c6 4639 trace_nfs4_write(hdr, task->tk_status);
9c27869d
TM		 4640 if (task->tk_status < 0) {
4641 struct nfs4_exception exception = {
4642 .inode = hdr->inode,
4643 .state = hdr->args.context->state,
4644 .stateid = &hdr->args.stateid,
4645 };
4646 task->tk_status = nfs4_async_handle_exception(task,
4647 NFS_SERVER(inode), task->tk_status,
4648 &exception);
4649 if (exception.retry) {
4650 rpc_restart_call_prepare(task);
4651 return -EAGAIN;
4652 }
1da177e4 4653 }
4f9838c7 4654 if (task->tk_status >= 0) {
d45f60c6 4655 renew_lease(NFS_SERVER(inode), hdr->timestamp);
a08a8cd3 4656 nfs_writeback_update_inode(hdr);
4f9838c7 4657 }
788e7a89 4658 return 0;
1da177e4
LT		 4659}
4660
5521abfd 4661static bool nfs4_write_stateid_changed(struct rpc_task *task,
3c6b899c 4662 struct nfs_pgio_args *args)
5521abfd
TM		 4663{
4664
4665 if (!nfs4_error_stateid_expired(task->tk_status) ||
4666 nfs4_stateid_is_current(&args->stateid,
4667 args->context,
4668 args->lock_context,
4669 FMODE_WRITE))
4670 return false;
4671 rpc_restart_call_prepare(task);
4672 return true;
4673}
4674
d45f60c6 4675static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
b029bc9b 4676{
d45f60c6 4677 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
b029bc9b 4678 return -EAGAIN;
d45f60c6 4679 if (nfs4_write_stateid_changed(task, &hdr->args))
5521abfd 4680 return -EAGAIN;
d45f60c6
WAA		 4681 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4682 nfs4_write_done_cb(task, hdr);
b029bc9b
FI		 4683}
4684
5a37f851 4685static
d45f60c6 4686bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
a69aef14 4687{
5a37f851 4688 /* Don't request attributes for pNFS or O_DIRECT writes */
d45f60c6 4689 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
5a37f851
TM		 4690 return false;
4691 /* Otherwise, request attributes if and only if we don't hold
4692 * a delegation
4693 */
011e2a7f 4694 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 4695}
a69aef14 4696
d45f60c6
WAA		 4697static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
4698 struct rpc_message *msg)
1da177e4 4699{
d45f60c6 4700 struct nfs_server *server = NFS_SERVER(hdr->inode);
bdc7f021 4701
d45f60c6
WAA		 4702 if (!nfs4_write_need_cache_consistency_data(hdr)) {
4703 hdr->args.bitmask = NULL;
4704 hdr->res.fattr = NULL;
7ffd1064 4705 } else
d45f60c6 4706 hdr->args.bitmask = server->cache_consistency_bitmask;
5a37f851 4707
d45f60c6
WAA		 4708 if (!hdr->pgio_done_cb)
4709 hdr->pgio_done_cb = nfs4_write_done_cb;
4710 hdr->res.server = server;
4711 hdr->timestamp = jiffies;
1da177e4 4712
bdc7f021 4713 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
d45f60c6 4714 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
1da177e4
LT		 4715}
4716
0b7c0153 4717static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 4718{
42e1cca7 4719 nfs4_setup_sequence(NFS_SERVER(data->inode)->nfs_client,
d9afbd1b
TM		 4720 &data->args.seq_args,
4721 &data->res.seq_res,
4722 task);
1da177e4
LT		 4723}
4724
0b7c0153 4725static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 4726{
1da177e4 4727 struct inode *inode = data->inode;
14516c3a 4728
cc668ab3 4729 trace_nfs4_commit(data, task->tk_status);
8478eaa1
N		 4730 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4731 NULL, NULL) == -EAGAIN) {
d00c5d43 4732 rpc_restart_call_prepare(task);
788e7a89 4733 return -EAGAIN;
1da177e4 4734 }
788e7a89 4735 return 0;
1da177e4
LT		 4736}
4737
0b7c0153 4738static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 4739{
4740 if (!nfs4_sequence_done(task, &data->res.seq_res))
4741 return -EAGAIN;
0b7c0153 4742 return data->commit_done_cb(task, data);
5f452431
FI		 4743}
4744
0b7c0153 4745static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 4746{
788e7a89 4747 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 4748
0b7c0153
FI		 4749 if (data->commit_done_cb == NULL)
4750 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 4751 data->res.server = server;
bdc7f021 4752 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
a9c92d6b 4753 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4754}
4755
9bc4e3ca
CL		 4756struct nfs4_renewdata {
4757 struct nfs_client *client;
4758 unsigned long timestamp;
4759};
4760
1da177e4
LT		 4761/*
4762 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4763 * standalone procedure for queueing an asynchronous RENEW.
4764 */
9bc4e3ca 4765static void nfs4_renew_release(void *calldata)
dc96aef9 4766{
9bc4e3ca
CL		 4767 struct nfs4_renewdata *data = calldata;
4768 struct nfs_client *clp = data->client;
dc96aef9 4769
0851de06
AB		 4770 if (atomic_read(&clp->cl_count) > 1)
4771 nfs4_schedule_state_renewal(clp);
4772 nfs_put_client(clp);
9bc4e3ca 4773 kfree(data);
dc96aef9
AB		 4774}
4775
9bc4e3ca 4776static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 4777{
9bc4e3ca
CL		 4778 struct nfs4_renewdata *data = calldata;
4779 struct nfs_client *clp = data->client;
4780 unsigned long timestamp = data->timestamp;
1da177e4 4781
c6d01c6f 4782 trace_nfs4_renew_async(clp, task->tk_status);
f8aba1e8
CL		 4783 switch (task->tk_status) {
4784 case 0:
4785 break;
4786 case -NFS4ERR_LEASE_MOVED:
4787 nfs4_schedule_lease_moved_recovery(clp);
4788 break;
4789 default:
95baa25c 4790 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 4791 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4792 return;
4793 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 4794 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 4795 return;
4796 }
4797 nfs4_schedule_path_down_recovery(clp);
1da177e4 4798 }
452e9352 4799 do_renew_lease(clp, timestamp);
1da177e4
LT		 4800}
4801
963d8fe5
TM		 4802static const struct rpc_call_ops nfs4_renew_ops = {
4803 .rpc_call_done = nfs4_renew_done,
dc96aef9 4804 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 4805};
4806
2f60ea6b 4807static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 4808{
4809 struct rpc_message msg = {
4810 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4811 .rpc_argp = clp,
b4454fe1 4812 .rpc_cred = cred,
1da177e4 4813 };
9bc4e3ca 4814 struct nfs4_renewdata *data;
1da177e4 4815
2f60ea6b
TM		 4816 if (renew_flags == 0)
4817 return 0;
0851de06
AB		 4818 if (!atomic_inc_not_zero(&clp->cl_count))
4819 return -EIO;
b569ad34 4820 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 4821 if (data == NULL)
4822 return -ENOMEM;
4823 data->client = clp;
4824 data->timestamp = jiffies;
bc7a05ca 4825 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 4826 &nfs4_renew_ops, data);
1da177e4
LT		 4827}
4828
8534d4ec 4829static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 4830{
4831 struct rpc_message msg = {
4832 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4833 .rpc_argp = clp,
b4454fe1 4834 .rpc_cred = cred,
1da177e4
LT		 4835 };
4836 unsigned long now = jiffies;
4837 int status;
4838
bc7a05ca 4839 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4840 if (status < 0)
4841 return status;
452e9352 4842 do_renew_lease(clp, now);
1da177e4
LT		 4843 return 0;
4844}
4845
aa1870af
BF		 4846static inline int nfs4_server_supports_acls(struct nfs_server *server)
4847{
7dd7d959 4848 return server->caps & NFS_CAP_ACLS;
aa1870af
BF		 4849}
4850
21f498c2
TM		 4851/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4852 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 4853 * the stack.
4854 */
21f498c2 4855#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 4856
e9e3d724 4857static int buf_to_pages_noslab(const void *buf, size_t buflen,
8fbcf237 4858 struct page **pages)
e9e3d724
NH		 4859{
4860 struct page *newpage, **spages;
4861 int rc = 0;
4862 size_t len;
4863 spages = pages;
4864
4865 do {
21f498c2 4866 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 4867 newpage = alloc_page(GFP_KERNEL);
4868
4869 if (newpage == NULL)
4870 goto unwind;
4871 memcpy(page_address(newpage), buf, len);
d9b67e1e
AS		 4872 buf += len;
4873 buflen -= len;
e9e3d724
NH		 4874 *pages++ = newpage;
4875 rc++;
4876 } while (buflen != 0);
4877
4878 return rc;
4879
4880unwind:
4881 for(; rc > 0; rc--)
4882 __free_page(spages[rc-1]);
4883 return -ENOMEM;
4884}
4885
e50a1c2e
BF		 4886struct nfs4_cached_acl {
4887 int cached;
4888 size_t len;
3e9d4154 4889 char data[0];
e50a1c2e
BF		 4890};
4891
4892static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4893{
4894 struct nfs_inode *nfsi = NFS_I(inode);
4895
4896 spin_lock(&inode->i_lock);
4897 kfree(nfsi->nfs4_acl);
4898 nfsi->nfs4_acl = acl;
4899 spin_unlock(&inode->i_lock);
4900}
4901
4902static void nfs4_zap_acl_attr(struct inode *inode)
4903{
4904 nfs4_set_cached_acl(inode, NULL);
4905}
4906
4907static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4908{
4909 struct nfs_inode *nfsi = NFS_I(inode);
4910 struct nfs4_cached_acl *acl;
4911 int ret = -ENOENT;
4912
4913 spin_lock(&inode->i_lock);
4914 acl = nfsi->nfs4_acl;
4915 if (acl == NULL)
4916 goto out;
4917 if (buf == NULL) /* user is just asking for length */
4918 goto out_len;
4919 if (acl->cached == 0)
4920 goto out;
4921 ret = -ERANGE; /* see getxattr(2) man page */
4922 if (acl->len > buflen)
4923 goto out;
4924 memcpy(buf, acl->data, acl->len);
4925out_len:
4926 ret = acl->len;
4927out:
4928 spin_unlock(&inode->i_lock);
4929 return ret;
4930}
4931
5794d21e 4932static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 4933{
4934 struct nfs4_cached_acl *acl;
b291f1b1 4935 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 4936
1f1ea6c2 4937 if (buflen <= PAGE_SIZE) {
b291f1b1 4938 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 4939 if (acl == NULL)
4940 goto out;
4941 acl->cached = 1;
5794d21e 4942 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 4943 } else {
4944 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4945 if (acl == NULL)
4946 goto out;
4947 acl->cached = 0;
4948 }
4949 acl->len = acl_len;
4950out:
4951 nfs4_set_cached_acl(inode, acl);
4952}
4953
bf118a34
AA		 4954/*
4955 * The getxattr API returns the required buffer length when called with a
4956 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4957 * the required buf. On a NULL buf, we send a page of data to the server
4958 * guessing that the ACL request can be serviced by a page. If so, we cache
4959 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4960 * the cache. If not so, we throw away the page, and cache the required
4961 * length. The next getxattr call will then produce another round trip to
4962 * the server, this time with the input buf of the required size.
4963 */
16b4289c 4964static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 4965{
bf118a34 4966 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 4967 struct nfs_getaclargs args = {
4968 .fh = NFS_FH(inode),
4969 .acl_pages = pages,
4970 .acl_len = buflen,
4971 };
663c79b3
BH		 4972 struct nfs_getaclres res = {
4973 .acl_len = buflen,
4974 };
aa1870af
BF		 4975 struct rpc_message msg = {
4976 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4977 .rpc_argp = &args,
663c79b3 4978 .rpc_resp = &res,
aa1870af 4979 };
21f498c2
TM		 4980 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4981 int ret = -ENOMEM, i;
aa1870af 4982
bf118a34
AA		 4983 /* As long as we're doing a round trip to the server anyway,
4984 * let's be prepared for a page of acl data. */
4985 if (npages == 0)
4986 npages = 1;
21f498c2
TM		 4987 if (npages > ARRAY_SIZE(pages))
4988 return -ERANGE;
5a006899 4989
bf118a34
AA		 4990 for (i = 0; i < npages; i++) {
4991 pages[i] = alloc_page(GFP_KERNEL);
4992 if (!pages[i])
4993 goto out_free;
e50a1c2e 4994 }
5a006899
SP		 4995
4996 /* for decoding across pages */
4997 res.acl_scratch = alloc_page(GFP_KERNEL);
4998 if (!res.acl_scratch)
4999 goto out_free;
5000
bf118a34 5001 args.acl_len = npages * PAGE_SIZE;
5a006899 5002
de040bec 5003 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 5004 __func__, buf, buflen, npages, args.acl_len);
5005 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
5006 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 5007 if (ret)
5008 goto out_free;
bf118a34 5009
1f1ea6c2
TM		 5010 /* Handle the case where the passed-in buffer is too short */
5011 if (res.acl_flags & NFS4_ACL_TRUNC) {
5012 /* Did the user only issue a request for the acl length? */
5013 if (buf == NULL)
5014 goto out_ok;
e50a1c2e 5015 ret = -ERANGE;
1f1ea6c2 5016 goto out_free;
e50a1c2e 5017 }
1f1ea6c2 5018 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 5019 if (buf) {
5020 if (res.acl_len > buflen) {
5021 ret = -ERANGE;
5022 goto out_free;
5023 }
1f1ea6c2 5024 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 5025 }
1f1ea6c2
TM		 5026out_ok:
5027 ret = res.acl_len;
e50a1c2e 5028out_free:
bf118a34
AA		 5029 for (i = 0; i < npages; i++)
5030 if (pages[i])
5031 __free_page(pages[i]);
331818f1
TM		 5032 if (res.acl_scratch)
5033 __free_page(res.acl_scratch);
aa1870af
BF		 5034 return ret;
5035}
5036
16b4289c
TM		 5037static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
5038{
5039 struct nfs4_exception exception = { };
5040 ssize_t ret;
5041 do {
5042 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
c1578b76 5043 trace_nfs4_get_acl(inode, ret);
16b4289c
TM		 5044 if (ret >= 0)
5045 break;
5046 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
5047 } while (exception.retry);
5048 return ret;
5049}
5050
e50a1c2e
BF		 5051static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
5052{
5053 struct nfs_server *server = NFS_SERVER(inode);
5054 int ret;
5055
5056 if (!nfs4_server_supports_acls(server))
5057 return -EOPNOTSUPP;
5058 ret = nfs_revalidate_inode(server, inode);
5059 if (ret < 0)
5060 return ret;
08a22b39
AK		 5061 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
5062 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 5063 ret = nfs4_read_cached_acl(inode, buf, buflen);
5064 if (ret != -ENOENT)
bf118a34
AA		 5065 /* -ENOENT is returned if there is no ACL or if there is an ACL
5066 * but no cached acl data, just the acl length */
e50a1c2e
BF		 5067 return ret;
5068 return nfs4_get_acl_uncached(inode, buf, buflen);
5069}
5070
16b4289c 5071static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 5072{
5073 struct nfs_server *server = NFS_SERVER(inode);
5074 struct page *pages[NFS4ACL_MAXPAGES];
5075 struct nfs_setaclargs arg = {
5076 .fh = NFS_FH(inode),
5077 .acl_pages = pages,
5078 .acl_len = buflen,
5079 };
73c403a9 5080 struct nfs_setaclres res;
4b580ee3
BF		 5081 struct rpc_message msg = {
5082 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
5083 .rpc_argp = &arg,
73c403a9 5084 .rpc_resp = &res,
4b580ee3 5085 };
21f498c2 5086 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 5087 int ret, i;
4b580ee3
BF		 5088
5089 if (!nfs4_server_supports_acls(server))
5090 return -EOPNOTSUPP;
21f498c2
TM		 5091 if (npages > ARRAY_SIZE(pages))
5092 return -ERANGE;
8fbcf237 5093 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages);
e9e3d724
NH		 5094 if (i < 0)
5095 return i;
57ec14c5 5096 nfs4_inode_return_delegation(inode);
7c513058 5097 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 5098
5099 /*
5100 * Free each page after tx, so the only ref left is
5101 * held by the network stack
5102 */
5103 for (; i > 0; i--)
5104 put_page(pages[i-1]);
5105
08a22b39
AK		 5106 /*
5107 * Acl update can result in inode attribute update.
5108 * so mark the attribute cache invalid.
5109 */
5110 spin_lock(&inode->i_lock);
5111 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
5112 spin_unlock(&inode->i_lock);
f41f7418
TM		 5113 nfs_access_zap_cache(inode);
5114 nfs_zap_acl_cache(inode);
4b580ee3
BF		 5115 return ret;
5116}
5117
16b4289c
TM		 5118static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
5119{
5120 struct nfs4_exception exception = { };
5121 int err;
5122 do {
c1578b76
TM		 5123 err = __nfs4_proc_set_acl(inode, buf, buflen);
5124 trace_nfs4_set_acl(inode, err);
5125 err = nfs4_handle_exception(NFS_SERVER(inode), err,
16b4289c
TM		 5126 &exception);
5127 } while (exception.retry);
5128 return err;
5129}
5130
aa9c2669
DQ		 5131#ifdef CONFIG_NFS_V4_SECURITY_LABEL
5132static int _nfs4_get_security_label(struct inode *inode, void *buf,
5133 size_t buflen)
5134{
5135 struct nfs_server *server = NFS_SERVER(inode);
5136 struct nfs_fattr fattr;
5137 struct nfs4_label label = {0, 0, buflen, buf};
5138
5139 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
fcb63a9b 5140 struct nfs4_getattr_arg arg = {
aa9c2669
DQ		 5141 .fh = NFS_FH(inode),
5142 .bitmask = bitmask,
5143 };
5144 struct nfs4_getattr_res res = {
5145 .fattr = &fattr,
5146 .label = &label,
5147 .server = server,
5148 };
5149 struct rpc_message msg = {
5150 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
fcb63a9b 5151 .rpc_argp = &arg,
aa9c2669
DQ		 5152 .rpc_resp = &res,
5153 };
5154 int ret;
5155
5156 nfs_fattr_init(&fattr);
5157
fcb63a9b 5158 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
aa9c2669
DQ		 5159 if (ret)
5160 return ret;
5161 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
5162 return -ENOENT;
5163 if (buflen < label.len)
5164 return -ERANGE;
5165 return 0;
5166}
5167
5168static int nfs4_get_security_label(struct inode *inode, void *buf,
5169 size_t buflen)
5170{
5171 struct nfs4_exception exception = { };
5172 int err;
5173
5174 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
5175 return -EOPNOTSUPP;
5176
5177 do {
c1578b76
TM		 5178 err = _nfs4_get_security_label(inode, buf, buflen);
5179 trace_nfs4_get_security_label(inode, err);
5180 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 5181 &exception);
5182 } while (exception.retry);
5183 return err;
5184}
5185
5186static int _nfs4_do_set_security_label(struct inode *inode,
5187 struct nfs4_label *ilabel,
5188 struct nfs_fattr *fattr,
5189 struct nfs4_label *olabel)
5190{
5191
5192 struct iattr sattr = {0};
5193 struct nfs_server *server = NFS_SERVER(inode);
5194 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
12207f69 5195 struct nfs_setattrargs arg = {
d9b67e1e
AS		 5196 .fh = NFS_FH(inode),
5197 .iap = &sattr,
aa9c2669
DQ		 5198 .server = server,
5199 .bitmask = bitmask,
5200 .label = ilabel,
5201 };
5202 struct nfs_setattrres res = {
5203 .fattr = fattr,
5204 .label = olabel,
5205 .server = server,
5206 };
5207 struct rpc_message msg = {
d9b67e1e
AS		 5208 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
5209 .rpc_argp = &arg,
5210 .rpc_resp = &res,
aa9c2669
DQ		 5211 };
5212 int status;
5213
12207f69 5214 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
aa9c2669 5215
12207f69 5216 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
aa9c2669
DQ		 5217 if (status)
5218 dprintk("%s failed: %d\n", __func__, status);
5219
5220 return status;
5221}
5222
5223static int nfs4_do_set_security_label(struct inode *inode,
5224 struct nfs4_label *ilabel,
5225 struct nfs_fattr *fattr,
5226 struct nfs4_label *olabel)
5227{
5228 struct nfs4_exception exception = { };
5229 int err;
5230
5231 do {
c1578b76
TM		 5232 err = _nfs4_do_set_security_label(inode, ilabel,
5233 fattr, olabel);
5234 trace_nfs4_set_security_label(inode, err);
5235 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 5236 &exception);
5237 } while (exception.retry);
5238 return err;
5239}
5240
5241static int
59301226 5242nfs4_set_security_label(struct inode *inode, const void *buf, size_t buflen)
aa9c2669
DQ		 5243{
5244 struct nfs4_label ilabel, *olabel = NULL;
5245 struct nfs_fattr fattr;
5246 struct rpc_cred *cred;
aa9c2669
DQ		 5247 int status;
5248
5249 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
5250 return -EOPNOTSUPP;
5251
5252 nfs_fattr_init(&fattr);
5253
5254 ilabel.pi = 0;
5255 ilabel.lfs = 0;
5256 ilabel.label = (char *)buf;
5257 ilabel.len = buflen;
5258
5259 cred = rpc_lookup_cred();
5260 if (IS_ERR(cred))
5261 return PTR_ERR(cred);
5262
5263 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
5264 if (IS_ERR(olabel)) {
5265 status = -PTR_ERR(olabel);
5266 goto out;
5267 }
5268
5269 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
5270 if (status == 0)
5271 nfs_setsecurity(inode, &fattr, olabel);
5272
5273 nfs4_label_free(olabel);
5274out:
5275 put_rpccred(cred);
5276 return status;
5277}
5278#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
5279
5280
f092075d
CL		 5281static void nfs4_init_boot_verifier(const struct nfs_client *clp,
5282 nfs4_verifier *bootverf)
cd93710e
CL		 5283{
5284 __be32 verf[2];
5285
2c820d9a
CL		 5286 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
5287 /* An impossible timestamp guarantees this value
5288 * will never match a generated boot time. */
2f86e091
DD		 5289 verf[0] = cpu_to_be32(U32_MAX);
5290 verf[1] = cpu_to_be32(U32_MAX);
2c820d9a 5291 } else {
f092075d 5292 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
2f86e091
DD		 5293 u64 ns = ktime_to_ns(nn->boot_time);
5294
5295 verf[0] = cpu_to_be32(ns >> 32);
5296 verf[1] = cpu_to_be32(ns);
2c820d9a 5297 }
cd93710e
CL		 5298 memcpy(bootverf->data, verf, sizeof(bootverf->data));
5299}
5300
a3192688
JL		 5301static int
5302nfs4_init_nonuniform_client_string(struct nfs_client *clp)
e984a55a 5303{
a3192688
JL		 5304 size_t len;
5305 char *str;
e984a55a 5306
ceb3a16c 5307 if (clp->cl_owner_id != NULL)
a3192688 5308 return 0;
4a3e5779 5309
a3192688 5310 rcu_read_lock();
4a70316c 5311 len = 14 + strlen(clp->cl_ipaddr) + 1 +
a3192688
JL		 5312 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) +
5313 1 +
5314 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO)) +
5315 1;
5316 rcu_read_unlock();
5317
5318 if (len > NFS4_OPAQUE_LIMIT + 1)
5319 return -EINVAL;
5320
5321 /*
5322 * Since this string is allocated at mount time, and held until the
5323 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5324 * about a memory-reclaim deadlock.
5325 */
5326 str = kmalloc(len, GFP_KERNEL);
5327 if (!str)
5328 return -ENOMEM;
ceb3a16c 5329
e984a55a 5330 rcu_read_lock();
f2dd436e 5331 scnprintf(str, len, "Linux NFSv4.0 %s/%s %s",
a3192688
JL		 5332 clp->cl_ipaddr,
5333 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR),
5334 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO));
e984a55a 5335 rcu_read_unlock();
a3192688 5336
a3192688
JL		 5337 clp->cl_owner_id = str;
5338 return 0;
e984a55a
CL		 5339}
5340
873e3851
JL		 5341static int
5342nfs4_init_uniquifier_client_string(struct nfs_client *clp)
5343{
873e3851
JL		 5344 size_t len;
5345 char *str;
5346
5347 len = 10 + 10 + 1 + 10 + 1 +
5348 strlen(nfs4_client_id_uniquifier) + 1 +
5349 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5350
5351 if (len > NFS4_OPAQUE_LIMIT + 1)
5352 return -EINVAL;
5353
5354 /*
5355 * Since this string is allocated at mount time, and held until the
5356 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5357 * about a memory-reclaim deadlock.
5358 */
5359 str = kmalloc(len, GFP_KERNEL);
5360 if (!str)
5361 return -ENOMEM;
5362
f2dd436e 5363 scnprintf(str, len, "Linux NFSv%u.%u %s/%s",
873e3851
JL		 5364 clp->rpc_ops->version, clp->cl_minorversion,
5365 nfs4_client_id_uniquifier,
5366 clp->cl_rpcclient->cl_nodename);
873e3851
JL		 5367 clp->cl_owner_id = str;
5368 return 0;
5369}
5370
5371static int
5372nfs4_init_uniform_client_string(struct nfs_client *clp)
e984a55a 5373{
873e3851
JL		 5374 size_t len;
5375 char *str;
ceb3a16c
TM		 5376
5377 if (clp->cl_owner_id != NULL)
873e3851 5378 return 0;
6f2ea7f2
CL		 5379
5380 if (nfs4_client_id_uniquifier[0] != '\0')
873e3851
JL		 5381 return nfs4_init_uniquifier_client_string(clp);
5382
5383 len = 10 + 10 + 1 + 10 + 1 +
5384 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5385
5386 if (len > NFS4_OPAQUE_LIMIT + 1)
5387 return -EINVAL;
5388
5389 /*
5390 * Since this string is allocated at mount time, and held until the
5391 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5392 * about a memory-reclaim deadlock.
5393 */
5394 str = kmalloc(len, GFP_KERNEL);
5395 if (!str)
5396 return -ENOMEM;
5397
f2dd436e 5398 scnprintf(str, len, "Linux NFSv%u.%u %s",
873e3851
JL		 5399 clp->rpc_ops->version, clp->cl_minorversion,
5400 clp->cl_rpcclient->cl_nodename);
873e3851
JL		 5401 clp->cl_owner_id = str;
5402 return 0;
e984a55a
CL		 5403}
5404
706cb8db
CL		 5405/*
5406 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
5407 * services. Advertise one based on the address family of the
5408 * clientaddr.
5409 */
5410static unsigned int
5411nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
5412{
5413 if (strchr(clp->cl_ipaddr, ':') != NULL)
5414 return scnprintf(buf, len, "tcp6");
5415 else
5416 return scnprintf(buf, len, "tcp");
5417}
5418
f11b2a1c
JL		 5419static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
5420{
5421 struct nfs4_setclientid *sc = calldata;
5422
5423 if (task->tk_status == 0)
5424 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
5425}
5426
5427static const struct rpc_call_ops nfs4_setclientid_ops = {
5428 .rpc_call_done = nfs4_setclientid_done,
5429};
5430
6bbb4ae8
CL		 5431/**
5432 * nfs4_proc_setclientid - Negotiate client ID
5433 * @clp: state data structure
5434 * @program: RPC program for NFSv4 callback service
5435 * @port: IP port number for NFS4 callback service
5436 * @cred: RPC credential to use for this call
5437 * @res: where to place the result
5438 *
5439 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5440 */
bb8b27e5
TM		 5441int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
5442 unsigned short port, struct rpc_cred *cred,
5443 struct nfs4_setclientid_res *res)
1da177e4
LT		 5444{
5445 nfs4_verifier sc_verifier;
5446 struct nfs4_setclientid setclientid = {
5447 .sc_verifier = &sc_verifier,
5448 .sc_prog = program,
3a6bb738 5449 .sc_clnt = clp,
1da177e4
LT		 5450 };
5451 struct rpc_message msg = {
5452 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
5453 .rpc_argp = &setclientid,
bb8b27e5 5454 .rpc_resp = res,
286d7d6a 5455 .rpc_cred = cred,
1da177e4 5456 };
f11b2a1c
JL		 5457 struct rpc_task *task;
5458 struct rpc_task_setup task_setup_data = {
5459 .rpc_client = clp->cl_rpcclient,
5460 .rpc_message = &msg,
5461 .callback_ops = &nfs4_setclientid_ops,
5462 .callback_data = &setclientid,
5463 .flags = RPC_TASK_TIMEOUT,
5464 };
6bbb4ae8 5465 int status;
1da177e4 5466
de734831 5467 /* nfs_client_id4 */
f092075d 5468 nfs4_init_boot_verifier(clp, &sc_verifier);
873e3851
JL		 5469
5470 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
5471 status = nfs4_init_uniform_client_string(clp);
5472 else
a3192688 5473 status = nfs4_init_nonuniform_client_string(clp);
873e3851
JL		 5474
5475 if (status)
5476 goto out;
3a6bb738 5477
de734831 5478 /* cb_client4 */
706cb8db
CL		 5479 setclientid.sc_netid_len =
5480 nfs4_init_callback_netid(clp,
5481 setclientid.sc_netid,
5482 sizeof(setclientid.sc_netid));
de734831 5483 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 5484 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 5485 clp->cl_ipaddr, port >> 8, port & 255);
5486
3a6bb738 5487 dprintk("NFS call setclientid auth=%s, '%s'\n",
6bbb4ae8 5488 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3a6bb738 5489 clp->cl_owner_id);
f11b2a1c
JL		 5490 task = rpc_run_task(&task_setup_data);
5491 if (IS_ERR(task)) {
5492 status = PTR_ERR(task);
5493 goto out;
5494 }
5495 status = task->tk_status;
5496 if (setclientid.sc_cred) {
5497 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
5498 put_rpccred(setclientid.sc_cred);
5499 }
5500 rpc_put_task(task);
5501out:
c6d01c6f 5502 trace_nfs4_setclientid(clp, status);
6bbb4ae8
CL		 5503 dprintk("NFS reply setclientid: %d\n", status);
5504 return status;
1da177e4
LT		 5505}
5506
6bbb4ae8
CL		 5507/**
5508 * nfs4_proc_setclientid_confirm - Confirm client ID
5509 * @clp: state data structure
5510 * @res: result of a previous SETCLIENTID
5511 * @cred: RPC credential to use for this call
5512 *
5513 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5514 */
fd954ae1 5515int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 5516 struct nfs4_setclientid_res *arg,
5517 struct rpc_cred *cred)
1da177e4 5518{
1da177e4
LT		 5519 struct rpc_message msg = {
5520 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 5521 .rpc_argp = arg,
286d7d6a 5522 .rpc_cred = cred,
1da177e4 5523 };
1da177e4
LT		 5524 int status;
5525
6bbb4ae8
CL		 5526 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
5527 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5528 clp->cl_clientid);
1bd714f2 5529 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 5530 trace_nfs4_setclientid_confirm(clp, status);
6bbb4ae8 5531 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 5532 return status;
5533}
5534
fe650407
TM		 5535struct nfs4_delegreturndata {
5536 struct nfs4_delegreturnargs args;
fa178f29 5537 struct nfs4_delegreturnres res;
fe650407
TM		 5538 struct nfs_fh fh;
5539 nfs4_stateid stateid;
26e976a8 5540 unsigned long timestamp;
586f1c39
TM		 5541 struct {
5542 struct nfs4_layoutreturn_args arg;
5543 struct nfs4_layoutreturn_res res;
4d796d75 5544 struct nfs4_xdr_opaque_data ld_private;
586f1c39
TM		 5545 u32 roc_barrier;
5546 bool roc;
5547 } lr;
fa178f29 5548 struct nfs_fattr fattr;
fe650407 5549 int rpc_status;
039b756a 5550 struct inode *inode;
fe650407
TM		 5551};
5552
fe650407
TM		 5553static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
5554{
5555 struct nfs4_delegreturndata *data = calldata;
938e1010 5556
14516c3a
TM		 5557 if (!nfs4_sequence_done(task, &data->res.seq_res))
5558 return;
938e1010 5559
ca8acf8d 5560 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
586f1c39
TM		 5561
5562 /* Handle Layoutreturn errors */
5563 if (data->args.lr_args && task->tk_status != 0) {
5564 switch(data->res.lr_ret) {
5565 default:
5566 data->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
5567 break;
5568 case 0:
5569 data->args.lr_args = NULL;
5570 data->res.lr_res = NULL;
5571 break;
5572 case -NFS4ERR_ADMIN_REVOKED:
5573 case -NFS4ERR_DELEG_REVOKED:
5574 case -NFS4ERR_EXPIRED:
5575 case -NFS4ERR_BAD_STATEID:
5576 case -NFS4ERR_OLD_STATEID:
5577 case -NFS4ERR_UNKNOWN_LAYOUTTYPE:
5578 case -NFS4ERR_WRONG_CRED:
5579 data->args.lr_args = NULL;
5580 data->res.lr_res = NULL;
5581 data->res.lr_ret = 0;
5582 rpc_restart_call_prepare(task);
5583 return;
5584 }
5585 }
5586
79708861 5587 switch (task->tk_status) {
79708861 5588 case 0:
fa178f29 5589 renew_lease(data->res.server, data->timestamp);
23ea44c2 5590 break;
c97cf606
TM		 5591 case -NFS4ERR_ADMIN_REVOKED:
5592 case -NFS4ERR_DELEG_REVOKED:
26d36301
TM		 5593 case -NFS4ERR_EXPIRED:
5594 nfs4_free_revoked_stateid(data->res.server,
5595 data->args.stateid,
5596 task->tk_msg.rpc_cred);
c97cf606
TM		 5597 case -NFS4ERR_BAD_STATEID:
5598 case -NFS4ERR_OLD_STATEID:
5599 case -NFS4ERR_STALE_STATEID:
c97cf606
TM		 5600 task->tk_status = 0;
5601 break;
8ac2b422
TM		 5602 case -NFS4ERR_ACCESS:
5603 if (data->args.bitmask) {
5604 data->args.bitmask = NULL;
5605 data->res.fattr = NULL;
5606 task->tk_status = 0;
5607 rpc_restart_call_prepare(task);
5608 return;
5609 }
79708861 5610 default:
8478eaa1
N		 5611 if (nfs4_async_handle_error(task, data->res.server,
5612 NULL, NULL) == -EAGAIN) {
d00c5d43 5613 rpc_restart_call_prepare(task);
79708861
RL		 5614 return;
5615 }
5616 }
5617 data->rpc_status = task->tk_status;
fe650407
TM		 5618}
5619
5620static void nfs4_delegreturn_release(void *calldata)
5621{
039b756a 5622 struct nfs4_delegreturndata *data = calldata;
ea7c38fe 5623 struct inode *inode = data->inode;
039b756a 5624
ea7c38fe 5625 if (inode) {
586f1c39 5626 if (data->lr.roc)
1c5bd76d
TM		 5627 pnfs_roc_release(&data->lr.arg, &data->lr.res,
5628 data->res.lr_ret);
0bc2c9b4 5629 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
ea7c38fe
TM		 5630 nfs_iput_and_deactive(inode);
5631 }
fe650407
TM		 5632 kfree(calldata);
5633}
5634
938e1010
AA		 5635static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5636{
5637 struct nfs4_delegreturndata *d_data;
5638
5639 d_data = (struct nfs4_delegreturndata *)data;
5640
1c5bd76d 5641 if (!d_data->lr.roc && nfs4_wait_on_layoutreturn(d_data->inode, task))
500d701f
PT		 5642 return;
5643
42e1cca7 5644 nfs4_setup_sequence(d_data->res.server->nfs_client,
d9afbd1b
TM		 5645 &d_data->args.seq_args,
5646 &d_data->res.seq_res,
5647 task);
938e1010 5648}
938e1010 5649
c8d149f3 5650static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010 5651 .rpc_call_prepare = nfs4_delegreturn_prepare,
fe650407
TM		 5652 .rpc_call_done = nfs4_delegreturn_done,
5653 .rpc_release = nfs4_delegreturn_release,
5654};
5655
e6f81075 5656static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 5657{
5658 struct nfs4_delegreturndata *data;
fa178f29 5659 struct nfs_server *server = NFS_SERVER(inode);
fe650407 5660 struct rpc_task *task;
5138fde0
TM		 5661 struct rpc_message msg = {
5662 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5663 .rpc_cred = cred,
5664 };
c970aa85
TM		 5665 struct rpc_task_setup task_setup_data = {
5666 .rpc_client = server->client,
5138fde0 5667 .rpc_message = &msg,
c970aa85
TM		 5668 .callback_ops = &nfs4_delegreturn_ops,
5669 .flags = RPC_TASK_ASYNC,
5670 };
e6f81075 5671 int status = 0;
fe650407 5672
8535b2be 5673 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 5674 if (data == NULL)
5675 return -ENOMEM;
a9c92d6b 5676 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
99ade3c7
AE		 5677
5678 nfs4_state_protect(server->nfs_client,
5679 NFS_SP4_MACH_CRED_CLEANUP,
5680 &task_setup_data.rpc_client, &msg);
5681
fe650407
TM		 5682 data->args.fhandle = &data->fh;
5683 data->args.stateid = &data->stateid;
9e907fec 5684 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 5685 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 5686 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 5687 data->res.fattr = &data->fattr;
5688 data->res.server = server;
586f1c39 5689 data->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
4d796d75 5690 data->lr.arg.ld_private = &data->lr.ld_private;
5138fde0 5691 nfs_fattr_init(data->res.fattr);
26e976a8 5692 data->timestamp = jiffies;
fe650407 5693 data->rpc_status = 0;
53e6fc86 5694 data->lr.roc = pnfs_roc(inode, &data->lr.arg, &data->lr.res, cred);
ea7c38fe 5695 data->inode = nfs_igrab_and_active(inode);
1c5bd76d 5696 if (data->inode) {
1c5bd76d
TM		 5697 if (data->lr.roc) {
5698 data->args.lr_args = &data->lr.arg;
5699 data->res.lr_res = &data->lr.res;
5700 }
53e6fc86
TM		 5701 } else if (data->lr.roc) {
5702 pnfs_roc_release(&data->lr.arg, &data->lr.res, 0);
5703 data->lr.roc = false;
1c5bd76d 5704 }
fe650407 5705
c970aa85 5706 task_setup_data.callback_data = data;
1174dd1f
TM		 5707 msg.rpc_argp = &data->args;
5708 msg.rpc_resp = &data->res;
c970aa85 5709 task = rpc_run_task(&task_setup_data);
7a1218a2 5710 if (IS_ERR(task))
fe650407 5711 return PTR_ERR(task);
e6f81075
TM		 5712 if (!issync)
5713 goto out;
820bf85c 5714 status = rpc_wait_for_completion_task(task);
e6f81075
TM		 5715 if (status != 0)
5716 goto out;
5717 status = data->rpc_status;
e6f81075 5718out:
e6b3c4db 5719 rpc_put_task(task);
fe650407 5720 return status;
1da177e4
LT		 5721}
5722
e6f81075 5723int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 5724{
5725 struct nfs_server *server = NFS_SERVER(inode);
5726 struct nfs4_exception exception = { };
5727 int err;
5728 do {
e6f81075 5729 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
48c9579a 5730 trace_nfs4_delegreturn(inode, stateid, err);
1da177e4
LT		 5731 switch (err) {
5732 case -NFS4ERR_STALE_STATEID:
5733 case -NFS4ERR_EXPIRED:
1da177e4
LT		 5734 case 0:
5735 return 0;
5736 }
5737 err = nfs4_handle_exception(server, err, &exception);
5738 } while (exception.retry);
5739 return err;
5740}
5741
1da177e4
LT		 5742static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5743{
5744 struct inode *inode = state->inode;
5745 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 5746 struct nfs_client *clp = server->nfs_client;
911d1aaf 5747 struct nfs_lockt_args arg = {
1da177e4 5748 .fh = NFS_FH(inode),
911d1aaf 5749 .fl = request,
1da177e4 5750 };
911d1aaf
TM		 5751 struct nfs_lockt_res res = {
5752 .denied = request,
1da177e4
LT		 5753 };
5754 struct rpc_message msg = {
5755 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
d9b67e1e
AS		 5756 .rpc_argp = &arg,
5757 .rpc_resp = &res,
1da177e4
LT		 5758 .rpc_cred = state->owner->so_cred,
5759 };
1da177e4
LT		 5760 struct nfs4_lock_state *lsp;
5761 int status;
5762
911d1aaf 5763 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 5764 status = nfs4_set_lock_state(state, request);
5765 if (status != 0)
5766 goto out;
5767 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 5768 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5769 arg.lock_owner.s_dev = server->s_dev;
7c513058 5770 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 5771 switch (status) {
5772 case 0:
5773 request->fl_type = F_UNLCK;
5774 break;
5775 case -NFS4ERR_DENIED:
5776 status = 0;
1da177e4 5777 }
70cc6487 5778 request->fl_ops->fl_release_private(request);
a6f951dd 5779 request->fl_ops = NULL;
8d0a8a9d 5780out:
1da177e4
LT		 5781 return status;
5782}
5783
5784static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5785{
5786 struct nfs4_exception exception = { };
5787 int err;
5788
5789 do {
d1b748a5
TM		 5790 err = _nfs4_proc_getlk(state, cmd, request);
5791 trace_nfs4_get_lock(request, state, cmd, err);
5792 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
1da177e4
LT		 5793 &exception);
5794 } while (exception.retry);
5795 return err;
5796}
5797
faf5f49c 5798struct nfs4_unlockdata {
911d1aaf
TM		 5799 struct nfs_locku_args arg;
5800 struct nfs_locku_res res;
faf5f49c
TM		 5801 struct nfs4_lock_state *lsp;
5802 struct nfs_open_context *ctx;
911d1aaf 5803 struct file_lock fl;
516285eb 5804 struct nfs_server *server;
26e976a8 5805 unsigned long timestamp;
faf5f49c
TM		 5806};
5807
911d1aaf
TM		 5808static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5809 struct nfs_open_context *ctx,
5810 struct nfs4_lock_state *lsp,
5811 struct nfs_seqid *seqid)
5812{
5813 struct nfs4_unlockdata *p;
5814 struct inode *inode = lsp->ls_state->inode;
5815
8535b2be 5816 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 5817 if (p == NULL)
5818 return NULL;
5819 p->arg.fh = NFS_FH(inode);
5820 p->arg.fl = &p->fl;
5821 p->arg.seqid = seqid;
c1d51931 5822 p->res.seqid = seqid;
911d1aaf
TM		 5823 p->lsp = lsp;
5824 atomic_inc(&lsp->ls_count);
5825 /* Ensure we don't close file until we're done freeing locks! */
5826 p->ctx = get_nfs_open_context(ctx);
5827 memcpy(&p->fl, fl, sizeof(p->fl));
5828 p->server = NFS_SERVER(inode);
5829 return p;
5830}
5831
06f814a3 5832static void nfs4_locku_release_calldata(void *data)
faf5f49c 5833{
963d8fe5 5834 struct nfs4_unlockdata *calldata = data;
911d1aaf 5835 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 5836 nfs4_put_lock_state(calldata->lsp);
5837 put_nfs_open_context(calldata->ctx);
5838 kfree(calldata);
faf5f49c
TM		 5839}
5840
963d8fe5 5841static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 5842{
963d8fe5 5843 struct nfs4_unlockdata *calldata = data;
faf5f49c 5844
14516c3a
TM		 5845 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5846 return;
faf5f49c
TM		 5847 switch (task->tk_status) {
5848 case 0:
26e976a8 5849 renew_lease(calldata->server, calldata->timestamp);
75575ddf 5850 locks_lock_inode_wait(calldata->lsp->ls_state->inode, &calldata->fl);
c69899a1
TM		 5851 if (nfs4_update_lock_stateid(calldata->lsp,
5852 &calldata->res.stateid))
5853 break;
26d36301
TM		 5854 case -NFS4ERR_ADMIN_REVOKED:
5855 case -NFS4ERR_EXPIRED:
5856 nfs4_free_revoked_stateid(calldata->server,
5857 &calldata->arg.stateid,
5858 task->tk_msg.rpc_cred);
9e33bed5
TM		 5859 case -NFS4ERR_BAD_STATEID:
5860 case -NFS4ERR_OLD_STATEID:
faf5f49c 5861 case -NFS4ERR_STALE_STATEID:
425c1d4e
TM		 5862 if (!nfs4_stateid_match(&calldata->arg.stateid,
5863 &calldata->lsp->ls_stateid))
5864 rpc_restart_call_prepare(task);
faf5f49c
TM		 5865 break;
5866 default:
8478eaa1
N		 5867 if (nfs4_async_handle_error(task, calldata->server,
5868 NULL, NULL) == -EAGAIN)
d00c5d43 5869 rpc_restart_call_prepare(task);
faf5f49c 5870 }
2b1bc308 5871 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 5872}
5873
4ce70ada 5874static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 5875{
4ce70ada 5876 struct nfs4_unlockdata *calldata = data;
faf5f49c 5877
911d1aaf 5878 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 5879 goto out_wait;
425c1d4e 5880 nfs4_stateid_copy(&calldata->arg.stateid, &calldata->lsp->ls_stateid);
795a88c9 5881 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 5882 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 5883 goto out_no_action;
faf5f49c 5884 }
26e976a8 5885 calldata->timestamp = jiffies;
42e1cca7 5886 if (nfs4_setup_sequence(calldata->server->nfs_client,
a893693c 5887 &calldata->arg.seq_args,
2240a9e2
TM		 5888 &calldata->res.seq_res,
5889 task) != 0)
5890 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 5891 return;
5892out_no_action:
5893 task->tk_action = NULL;
5894out_wait:
5895 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 5896}
5897
963d8fe5 5898static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 5899 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 5900 .rpc_call_done = nfs4_locku_done,
06f814a3 5901 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 5902};
5903
a5d16a4d
TM		 5904static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5905 struct nfs_open_context *ctx,
5906 struct nfs4_lock_state *lsp,
5907 struct nfs_seqid *seqid)
5908{
5909 struct nfs4_unlockdata *data;
5138fde0
TM		 5910 struct rpc_message msg = {
5911 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5912 .rpc_cred = ctx->cred,
5913 };
c970aa85
TM		 5914 struct rpc_task_setup task_setup_data = {
5915 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 5916 .rpc_message = &msg,
c970aa85 5917 .callback_ops = &nfs4_locku_ops,
101070ca 5918 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5919 .flags = RPC_TASK_ASYNC,
5920 };
a5d16a4d 5921
fa940720
WAA		 5922 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5923 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5924
137d6aca
FF		 5925 /* Ensure this is an unlock - when canceling a lock, the
5926 * canceled lock is passed in, and it won't be an unlock.
5927 */
5928 fl->fl_type = F_UNLCK;
5929
a5d16a4d
TM		 5930 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5931 if (data == NULL) {
5932 nfs_free_seqid(seqid);
5933 return ERR_PTR(-ENOMEM);
5934 }
5935
a9c92d6b 5936 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5937 msg.rpc_argp = &data->arg;
5938 msg.rpc_resp = &data->res;
c970aa85
TM		 5939 task_setup_data.callback_data = data;
5940 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 5941}
5942
faf5f49c
TM		 5943static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5944{
65b62a29
TM		 5945 struct inode *inode = state->inode;
5946 struct nfs4_state_owner *sp = state->owner;
5947 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 5948 struct nfs_seqid *seqid;
1da177e4 5949 struct nfs4_lock_state *lsp;
06f814a3 5950 struct rpc_task *task;
b4019c0e 5951 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
06f814a3 5952 int status = 0;
536ff0f8 5953 unsigned char fl_flags = request->fl_flags;
faf5f49c 5954
8d0a8a9d 5955 status = nfs4_set_lock_state(state, request);
9b073574
TM		 5956 /* Unlock _before_ we do the RPC call */
5957 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 5958 /* Exclude nfs_delegation_claim_locks() */
5959 mutex_lock(&sp->so_delegreturn_mutex);
5960 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57 5961 down_read(&nfsi->rwsem);
75575ddf 5962 if (locks_lock_inode_wait(inode, request) == -ENOENT) {
19e03c57 5963 up_read(&nfsi->rwsem);
65b62a29 5964 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 5965 goto out;
19e03c57
TM		 5966 }
5967 up_read(&nfsi->rwsem);
65b62a29 5968 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 5969 if (status != 0)
9b073574
TM		 5970 goto out;
5971 /* Is this a delegated lock? */
8d0a8a9d 5972 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 5973 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5974 goto out;
b4019c0e
TM		 5975 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid;
5976 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 5977 status = -ENOMEM;
badc76dd 5978 if (IS_ERR(seqid))
9b073574 5979 goto out;
cd3758e3 5980 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 5981 status = PTR_ERR(task);
5982 if (IS_ERR(task))
9b073574 5983 goto out;
820bf85c 5984 status = rpc_wait_for_completion_task(task);
e6b3c4db 5985 rpc_put_task(task);
9b073574 5986out:
536ff0f8 5987 request->fl_flags = fl_flags;
d1b748a5 5988 trace_nfs4_unlock(request, state, F_SETLK, status);
1da177e4
LT		 5989 return status;
5990}
5991
a5d16a4d
TM		 5992struct nfs4_lockdata {
5993 struct nfs_lock_args arg;
5994 struct nfs_lock_res res;
5995 struct nfs4_lock_state *lsp;
5996 struct nfs_open_context *ctx;
5997 struct file_lock fl;
26e976a8 5998 unsigned long timestamp;
a5d16a4d
TM		 5999 int rpc_status;
6000 int cancelled;
66179efe 6001 struct nfs_server *server;
a5d16a4d
TM		 6002};
6003
6004static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 6005 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
6006 gfp_t gfp_mask)
1da177e4 6007{
a5d16a4d
TM		 6008 struct nfs4_lockdata *p;
6009 struct inode *inode = lsp->ls_state->inode;
1da177e4 6010 struct nfs_server *server = NFS_SERVER(inode);
b4019c0e 6011 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
a5d16a4d 6012
8535b2be 6013 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 6014 if (p == NULL)
6015 return NULL;
6016
6017 p->arg.fh = NFS_FH(inode);
6018 p->arg.fl = &p->fl;
8535b2be 6019 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
badc76dd 6020 if (IS_ERR(p->arg.open_seqid))
2f74c0a0 6021 goto out_free;
b4019c0e
TM		 6022 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
6023 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask);
badc76dd 6024 if (IS_ERR(p->arg.lock_seqid))
2f74c0a0 6025 goto out_free_seqid;
7539bbab 6026 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 6027 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 6028 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 6029 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 6030 p->lsp = lsp;
66179efe 6031 p->server = server;
a5d16a4d
TM		 6032 atomic_inc(&lsp->ls_count);
6033 p->ctx = get_nfs_open_context(ctx);
6034 memcpy(&p->fl, fl, sizeof(p->fl));
6035 return p;
2f74c0a0
TM		 6036out_free_seqid:
6037 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 6038out_free:
6039 kfree(p);
6040 return NULL;
6041}
6042
6043static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
6044{
6045 struct nfs4_lockdata *data = calldata;
6046 struct nfs4_state *state = data->lsp->ls_state;
06735b34 6047
3110ff80 6048 dprintk("%s: begin!\n", __func__);
2f74c0a0 6049 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 6050 goto out_wait;
a5d16a4d 6051 /* Do we need to do an open_to_lock_owner? */
6b447539 6052 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) {
8fe72bac 6053 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 6054 goto out_release_lock_seqid;
8fe72bac 6055 }
425c1d4e
TM		 6056 nfs4_stateid_copy(&data->arg.open_stateid,
6057 &state->open_stateid);
a5d16a4d 6058 data->arg.new_lock_owner = 1;
c1d51931 6059 data->res.open_seqid = data->arg.open_seqid;
425c1d4e 6060 } else {
2f74c0a0 6061 data->arg.new_lock_owner = 0;
425c1d4e
TM		 6062 nfs4_stateid_copy(&data->arg.lock_stateid,
6063 &data->lsp->ls_stateid);
6064 }
5d422301
TM		 6065 if (!nfs4_valid_open_stateid(state)) {
6066 data->rpc_status = -EBADF;
6067 task->tk_action = NULL;
6068 goto out_release_open_seqid;
6069 }
26e976a8 6070 data->timestamp = jiffies;
42e1cca7 6071 if (nfs4_setup_sequence(data->server->nfs_client,
035168ab 6072 &data->arg.seq_args,
2240a9e2 6073 &data->res.seq_res,
d9afbd1b 6074 task) == 0)
66179efe 6075 return;
5d422301 6076out_release_open_seqid:
2240a9e2
TM		 6077 nfs_release_seqid(data->arg.open_seqid);
6078out_release_lock_seqid:
6079 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 6080out_wait:
6081 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 6082 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 6083}
6084
a5d16a4d
TM		 6085static void nfs4_lock_done(struct rpc_task *task, void *calldata)
6086{
6087 struct nfs4_lockdata *data = calldata;
39071e6f 6088 struct nfs4_lock_state *lsp = data->lsp;
a5d16a4d 6089
3110ff80 6090 dprintk("%s: begin!\n", __func__);
a5d16a4d 6091
14516c3a
TM		 6092 if (!nfs4_sequence_done(task, &data->res.seq_res))
6093 return;
66179efe 6094
a5d16a4d 6095 data->rpc_status = task->tk_status;
425c1d4e
TM		 6096 switch (task->tk_status) {
6097 case 0:
2b0143b5 6098 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)),
39071e6f 6099 data->timestamp);
c69899a1
TM		 6100 if (data->arg.new_lock) {
6101 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS);
75575ddf 6102 if (locks_lock_inode_wait(lsp->ls_state->inode, &data->fl) < 0) {
c69899a1
TM		 6103 rpc_restart_call_prepare(task);
6104 break;
6105 }
6106 }
39071e6f
TM		 6107 if (data->arg.new_lock_owner != 0) {
6108 nfs_confirm_seqid(&lsp->ls_seqid, 0);
6109 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid);
6110 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
6111 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid))
6112 rpc_restart_call_prepare(task);
425c1d4e
TM		 6113 break;
6114 case -NFS4ERR_BAD_STATEID:
6115 case -NFS4ERR_OLD_STATEID:
6116 case -NFS4ERR_STALE_STATEID:
6117 case -NFS4ERR_EXPIRED:
6118 if (data->arg.new_lock_owner != 0) {
6119 if (!nfs4_stateid_match(&data->arg.open_stateid,
6120 &lsp->ls_state->open_stateid))
6121 rpc_restart_call_prepare(task);
6122 } else if (!nfs4_stateid_match(&data->arg.lock_stateid,
6123 &lsp->ls_stateid))
6124 rpc_restart_call_prepare(task);
a5d16a4d 6125 }
3110ff80 6126 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 6127}
6128
6129static void nfs4_lock_release(void *calldata)
6130{
6131 struct nfs4_lockdata *data = calldata;
6132
3110ff80 6133 dprintk("%s: begin!\n", __func__);
2f74c0a0 6134 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 6135 if (data->cancelled != 0) {
6136 struct rpc_task *task;
6137 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
6138 data->arg.lock_seqid);
6139 if (!IS_ERR(task))
bf294b41 6140 rpc_put_task_async(task);
3110ff80 6141 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 6142 } else
6143 nfs_free_seqid(data->arg.lock_seqid);
6144 nfs4_put_lock_state(data->lsp);
6145 put_nfs_open_context(data->ctx);
6146 kfree(data);
3110ff80 6147 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 6148}
6149
6150static const struct rpc_call_ops nfs4_lock_ops = {
6151 .rpc_call_prepare = nfs4_lock_prepare,
6152 .rpc_call_done = nfs4_lock_done,
6153 .rpc_release = nfs4_lock_release,
6154};
6155
2bee72a6
TM		 6156static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
6157{
2bee72a6
TM		 6158 switch (error) {
6159 case -NFS4ERR_ADMIN_REVOKED:
d7f3e4bf 6160 case -NFS4ERR_EXPIRED:
2bee72a6 6161 case -NFS4ERR_BAD_STATEID:
ecac799a 6162 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 6163 if (new_lock_owner != 0 ||
795a88c9 6164 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 6165 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 6166 break;
6167 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 6168 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a 6169 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 6170 };
6171}
6172
afe6c27c 6173static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 6174{
6175 struct nfs4_lockdata *data;
6176 struct rpc_task *task;
5138fde0
TM		 6177 struct rpc_message msg = {
6178 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
6179 .rpc_cred = state->owner->so_cred,
6180 };
c970aa85
TM		 6181 struct rpc_task_setup task_setup_data = {
6182 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 6183 .rpc_message = &msg,
c970aa85 6184 .callback_ops = &nfs4_lock_ops,
101070ca 6185 .workqueue = nfsiod_workqueue,
c970aa85
TM		 6186 .flags = RPC_TASK_ASYNC,
6187 };
a5d16a4d
TM		 6188 int ret;
6189
3110ff80 6190 dprintk("%s: begin!\n", __func__);
cd3758e3 6191 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 6192 fl->fl_u.nfs4_fl.owner,
6193 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 6194 if (data == NULL)
6195 return -ENOMEM;
6196 if (IS_SETLKW(cmd))
6197 data->arg.block = 1;
a9c92d6b 6198 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 6199 msg.rpc_argp = &data->arg;
6200 msg.rpc_resp = &data->res;
c970aa85 6201 task_setup_data.callback_data = data;
8fe72bac
TM		 6202 if (recovery_type > NFS_LOCK_NEW) {
6203 if (recovery_type == NFS_LOCK_RECLAIM)
6204 data->arg.reclaim = NFS_LOCK_RECLAIM;
6205 nfs4_set_sequence_privileged(&data->arg.seq_args);
c69899a1
TM		 6206 } else
6207 data->arg.new_lock = 1;
c970aa85 6208 task = rpc_run_task(&task_setup_data);
7a1218a2 6209 if (IS_ERR(task))
a5d16a4d 6210 return PTR_ERR(task);
820bf85c 6211 ret = rpc_wait_for_completion_task(task);
a5d16a4d
TM		 6212 if (ret == 0) {
6213 ret = data->rpc_status;
2bee72a6
TM		 6214 if (ret)
6215 nfs4_handle_setlk_error(data->server, data->lsp,
6216 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 6217 } else
6218 data->cancelled = 1;
e6b3c4db 6219 rpc_put_task(task);
3110ff80 6220 dprintk("%s: done, ret = %d!\n", __func__, ret);
48c9579a 6221 trace_nfs4_set_lock(fl, state, &data->res.stateid, cmd, ret);
a5d16a4d 6222 return ret;
1da177e4
LT		 6223}
6224
6225static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
6226{
202b50dc 6227 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 6228 struct nfs4_exception exception = {
6229 .inode = state->inode,
6230 };
202b50dc
TM		 6231 int err;
6232
6233 do {
42a2d13e
TM		 6234 /* Cache the lock if possible... */
6235 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
6236 return 0;
afe6c27c 6237 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 6238 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 6239 break;
6240 nfs4_handle_exception(server, err, &exception);
6241 } while (exception.retry);
6242 return err;
1da177e4
LT		 6243}
6244
6245static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
6246{
202b50dc 6247 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 6248 struct nfs4_exception exception = {
6249 .inode = state->inode,
6250 };
202b50dc
TM		 6251 int err;
6252
6bfc93ef
TM		 6253 err = nfs4_set_lock_state(state, request);
6254 if (err != 0)
6255 return err;
f6de7a39 6256 if (!recover_lost_locks) {
ef1820f9
N		 6257 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
6258 return 0;
6259 }
202b50dc 6260 do {
42a2d13e
TM		 6261 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
6262 return 0;
afe6c27c 6263 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 6264 switch (err) {
6265 default:
6266 goto out;
6267 case -NFS4ERR_GRACE:
6268 case -NFS4ERR_DELAY:
6269 nfs4_handle_exception(server, err, &exception);
6270 err = 0;
6271 }
202b50dc 6272 } while (exception.retry);
a9ed2e25 6273out:
202b50dc 6274 return err;
1da177e4
LT		 6275}
6276
f062eb6c 6277#if defined(CONFIG_NFS_V4_1)
b01dd1d8
BS		 6278static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
6279{
c5896fc8
TM		 6280 struct nfs4_lock_state *lsp;
6281 int status;
b01dd1d8 6282
c5896fc8
TM		 6283 status = nfs4_set_lock_state(state, request);
6284 if (status != 0)
6285 return status;
6286 lsp = request->fl_u.nfs4_fl.owner;
6287 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) ||
6288 test_bit(NFS_LOCK_LOST, &lsp->ls_flags))
6289 return 0;
6290 status = nfs4_lock_expired(state, request);
eb64cf96 6291 return status;
f062eb6c
BS		 6292}
6293#endif
6294
1da177e4
LT		 6295static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6296{
19e03c57 6297 struct nfs_inode *nfsi = NFS_I(state->inode);
11476e9d 6298 struct nfs4_state_owner *sp = state->owner;
01c3b861 6299 unsigned char fl_flags = request->fl_flags;
1ea67dbd 6300 int status;
1da177e4 6301
01c3b861 6302 request->fl_flags |= FL_ACCESS;
75575ddf 6303 status = locks_lock_inode_wait(state->inode, request);
01c3b861
TM		 6304 if (status < 0)
6305 goto out;
11476e9d 6306 mutex_lock(&sp->so_delegreturn_mutex);
19e03c57 6307 down_read(&nfsi->rwsem);
01c3b861 6308 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 6309 /* Yes: cache locks! */
01c3b861 6310 /* ...but avoid races with delegation recall... */
19e03c57 6311 request->fl_flags = fl_flags & ~FL_SLEEP;
75575ddf 6312 status = locks_lock_inode_wait(state->inode, request);
c69899a1 6313 up_read(&nfsi->rwsem);
11476e9d 6314 mutex_unlock(&sp->so_delegreturn_mutex);
9a99af49 6315 goto out;
9a99af49 6316 }
19e03c57 6317 up_read(&nfsi->rwsem);
11476e9d 6318 mutex_unlock(&sp->so_delegreturn_mutex);
c69899a1 6319 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
01c3b861
TM		 6320out:
6321 request->fl_flags = fl_flags;
1da177e4
LT		 6322 return status;
6323}
6324
6325static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6326{
a1d0b5ee
TM		 6327 struct nfs4_exception exception = {
6328 .state = state,
05ffe24f 6329 .inode = state->inode,
a1d0b5ee 6330 };
1da177e4
LT		 6331 int err;
6332
6333 do {
965b5d67
TM		 6334 err = _nfs4_proc_setlk(state, cmd, request);
6335 if (err == -NFS4ERR_DENIED)
6336 err = -EAGAIN;
1da177e4 6337 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 6338 err, &exception);
1da177e4
LT		 6339 } while (exception.retry);
6340 return err;
6341}
6342
d2f3a7f9
JL		 6343#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
6344#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
6345
6346static int
a1d617d8
JL		 6347nfs4_retry_setlk_simple(struct nfs4_state *state, int cmd,
6348 struct file_lock *request)
d2f3a7f9
JL		 6349{
6350 int status = -ERESTARTSYS;
6351 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
6352
6353 while(!signalled()) {
6354 status = nfs4_proc_setlk(state, cmd, request);
6355 if ((status != -EAGAIN) || IS_SETLK(cmd))
6356 break;
6357 freezable_schedule_timeout_interruptible(timeout);
6358 timeout *= 2;
6359 timeout = min_t(unsigned long, NFS4_LOCK_MAXTIMEOUT, timeout);
6360 status = -ERESTARTSYS;
6361 }
6362 return status;
6363}
6364
a1d617d8
JL		 6365#ifdef CONFIG_NFS_V4_1
6366struct nfs4_lock_waiter {
6367 struct task_struct *task;
6368 struct inode *inode;
6369 struct nfs_lowner *owner;
6370 bool notified;
6371};
6372
6373static int
6374nfs4_wake_lock_waiter(wait_queue_t *wait, unsigned int mode, int flags, void *key)
6375{
6376 int ret;
6377 struct cb_notify_lock_args *cbnl = key;
6378 struct nfs4_lock_waiter *waiter = wait->private;
6379 struct nfs_lowner *lowner = &cbnl->cbnl_owner,
6380 *wowner = waiter->owner;
6381
6382 /* Only wake if the callback was for the same owner */
6383 if (lowner->clientid != wowner->clientid ||
6384 lowner->id != wowner->id ||
6385 lowner->s_dev != wowner->s_dev)
6386 return 0;
6387
6388 /* Make sure it's for the right inode */
6389 if (nfs_compare_fh(NFS_FH(waiter->inode), &cbnl->cbnl_fh))
6390 return 0;
6391
6392 waiter->notified = true;
6393
6394 /* override "private" so we can use default_wake_function */
6395 wait->private = waiter->task;
6396 ret = autoremove_wake_function(wait, mode, flags, key);
6397 wait->private = waiter;
6398 return ret;
6399}
6400
6401static int
6402nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6403{
6404 int status = -ERESTARTSYS;
6405 unsigned long flags;
6406 struct nfs4_lock_state *lsp = request->fl_u.nfs4_fl.owner;
6407 struct nfs_server *server = NFS_SERVER(state->inode);
6408 struct nfs_client *clp = server->nfs_client;
6409 wait_queue_head_t *q = &clp->cl_lock_waitq;
6410 struct nfs_lowner owner = { .clientid = clp->cl_clientid,
6411 .id = lsp->ls_seqid.owner_id,
6412 .s_dev = server->s_dev };
6413 struct nfs4_lock_waiter waiter = { .task = current,
6414 .inode = state->inode,
6415 .owner = &owner,
6416 .notified = false };
6417 wait_queue_t wait;
6418
6419 /* Don't bother with waitqueue if we don't expect a callback */
6420 if (!test_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags))
6421 return nfs4_retry_setlk_simple(state, cmd, request);
6422
6423 init_wait(&wait);
6424 wait.private = &waiter;
6425 wait.func = nfs4_wake_lock_waiter;
6426 add_wait_queue(q, &wait);
6427
6428 while(!signalled()) {
6429 status = nfs4_proc_setlk(state, cmd, request);
6430 if ((status != -EAGAIN) || IS_SETLK(cmd))
6431 break;
6432
6433 status = -ERESTARTSYS;
6434 spin_lock_irqsave(&q->lock, flags);
6435 if (waiter.notified) {
6436 spin_unlock_irqrestore(&q->lock, flags);
6437 continue;
6438 }
6439 set_current_state(TASK_INTERRUPTIBLE);
6440 spin_unlock_irqrestore(&q->lock, flags);
6441
6442 freezable_schedule_timeout_interruptible(NFS4_LOCK_MAXTIMEOUT);
6443 }
6444
6445 finish_wait(q, &wait);
6446 return status;
6447}
6448#else /* !CONFIG_NFS_V4_1 */
6449static inline int
6450nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6451{
6452 return nfs4_retry_setlk_simple(state, cmd, request);
6453}
6454#endif
6455
1da177e4
LT		 6456static int
6457nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
6458{
6459 struct nfs_open_context *ctx;
6460 struct nfs4_state *state;
1da177e4
LT		 6461 int status;
6462
6463 /* verify open state */
cd3758e3 6464 ctx = nfs_file_open_context(filp);
1da177e4
LT		 6465 state = ctx->state;
6466
6467 if (request->fl_start < 0 || request->fl_end < 0)
6468 return -EINVAL;
6469
d953126a
TM		 6470 if (IS_GETLK(cmd)) {
6471 if (state != NULL)
6472 return nfs4_proc_getlk(state, F_GETLK, request);
6473 return 0;
6474 }
1da177e4
LT		 6475
6476 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
6477 return -EINVAL;
6478
d953126a
TM		 6479 if (request->fl_type == F_UNLCK) {
6480 if (state != NULL)
6481 return nfs4_proc_unlck(state, cmd, request);
6482 return 0;
6483 }
1da177e4 6484
d953126a
TM		 6485 if (state == NULL)
6486 return -ENOLCK;
1ea67dbd
JL		 6487
6488 if ((request->fl_flags & FL_POSIX) &&
6489 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
6490 return -ENOLCK;
6491
55725513
TM		 6492 /*
6493 * Don't rely on the VFS having checked the file open mode,
6494 * since it won't do this for flock() locks.
6495 */
f44106e2 6496 switch (request->fl_type) {
55725513
TM		 6497 case F_RDLCK:
6498 if (!(filp->f_mode & FMODE_READ))
6499 return -EBADF;
6500 break;
6501 case F_WRLCK:
6502 if (!(filp->f_mode & FMODE_WRITE))
6503 return -EBADF;
6504 }
6505
1ea67dbd
JL		 6506 status = nfs4_set_lock_state(state, request);
6507 if (status != 0)
6508 return status;
6509
d2f3a7f9 6510 return nfs4_retry_setlk(state, cmd, request);
1da177e4
LT		 6511}
6512
db4f2e63 6513int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 6514{
6515 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 6516 int err;
6517
6518 err = nfs4_set_lock_state(state, fl);
6519 if (err != 0)
db4f2e63 6520 return err;
4a706fa0 6521 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 6522 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 6523}
6b3b5496 6524
cf470c3e
TM		 6525struct nfs_release_lockowner_data {
6526 struct nfs4_lock_state *lsp;
5ae67c4f 6527 struct nfs_server *server;
cf470c3e 6528 struct nfs_release_lockowner_args args;
b7e63a10 6529 struct nfs_release_lockowner_res res;
60ea6812 6530 unsigned long timestamp;
cf470c3e
TM		 6531};
6532
fbd4bfd1
CL		 6533static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
6534{
6535 struct nfs_release_lockowner_data *data = calldata;
5b53dc88 6536 struct nfs_server *server = data->server;
7981c8a6
AS		 6537 nfs4_setup_sequence(server->nfs_client, &data->args.seq_args,
6538 &data->res.seq_res, task);
5b53dc88 6539 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
60ea6812 6540 data->timestamp = jiffies;
fbd4bfd1
CL		 6541}
6542
6543static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
6544{
6545 struct nfs_release_lockowner_data *data = calldata;
60ea6812
CL		 6546 struct nfs_server *server = data->server;
6547
b7e63a10 6548 nfs40_sequence_done(task, &data->res.seq_res);
60ea6812
CL		 6549
6550 switch (task->tk_status) {
6551 case 0:
6552 renew_lease(server, data->timestamp);
6553 break;
6554 case -NFS4ERR_STALE_CLIENTID:
6555 case -NFS4ERR_EXPIRED:
5b53dc88
KM		 6556 nfs4_schedule_lease_recovery(server->nfs_client);
6557 break;
60ea6812
CL		 6558 case -NFS4ERR_LEASE_MOVED:
6559 case -NFS4ERR_DELAY:
8478eaa1
N		 6560 if (nfs4_async_handle_error(task, server,
6561 NULL, NULL) == -EAGAIN)
60ea6812
CL		 6562 rpc_restart_call_prepare(task);
6563 }
fbd4bfd1
CL		 6564}
6565
d3c7b7cc
TM		 6566static void nfs4_release_lockowner_release(void *calldata)
6567{
cf470c3e 6568 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 6569 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 6570 kfree(calldata);
6571}
6572
17280175 6573static const struct rpc_call_ops nfs4_release_lockowner_ops = {
fbd4bfd1
CL		 6574 .rpc_call_prepare = nfs4_release_lockowner_prepare,
6575 .rpc_call_done = nfs4_release_lockowner_done,
d3c7b7cc
TM		 6576 .rpc_release = nfs4_release_lockowner_release,
6577};
6578
f1cdae87
JL		 6579static void
6580nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 6581{
cf470c3e 6582 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 6583 struct rpc_message msg = {
6584 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
6585 };
6586
6587 if (server->nfs_client->cl_mvops->minor_version != 0)
f1cdae87 6588 return;
fbd4bfd1 6589
cf470c3e
TM		 6590 data = kmalloc(sizeof(*data), GFP_NOFS);
6591 if (!data)
f1cdae87 6592 return;
cf470c3e 6593 data->lsp = lsp;
5ae67c4f 6594 data->server = server;
cf470c3e
TM		 6595 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6596 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
6597 data->args.lock_owner.s_dev = server->s_dev;
fbd4bfd1 6598
cf470c3e 6599 msg.rpc_argp = &data->args;
b7e63a10
TM		 6600 msg.rpc_resp = &data->res;
6601 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
cf470c3e 6602 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
d3c7b7cc
TM		 6603}
6604
aa1870af
BF		 6605#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
6606
d9a82a04 6607static int nfs4_xattr_set_nfs4_acl(const struct xattr_handler *handler,
59301226
AV		 6608 struct dentry *unused, struct inode *inode,
6609 const char *key, const void *buf,
6610 size_t buflen, int flags)
6b3b5496 6611{
59301226 6612 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 6613}
6614
d9a82a04 6615static int nfs4_xattr_get_nfs4_acl(const struct xattr_handler *handler,
b296821a
AV		 6616 struct dentry *unused, struct inode *inode,
6617 const char *key, void *buf, size_t buflen)
6b3b5496 6618{
b296821a 6619 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 6620}
6621
764a5c6b 6622static bool nfs4_xattr_list_nfs4_acl(struct dentry *dentry)
6b3b5496 6623{
764a5c6b 6624 return nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry)));
6b3b5496
BF		 6625}
6626
c9bccef6 6627#ifdef CONFIG_NFS_V4_SECURITY_LABEL
c9bccef6 6628
d9a82a04 6629static int nfs4_xattr_set_nfs4_label(const struct xattr_handler *handler,
59301226
AV		 6630 struct dentry *unused, struct inode *inode,
6631 const char *key, const void *buf,
6632 size_t buflen, int flags)
c9bccef6
DQ		 6633{
6634 if (security_ismaclabel(key))
59301226 6635 return nfs4_set_security_label(inode, buf, buflen);
c9bccef6
DQ		 6636
6637 return -EOPNOTSUPP;
6638}
6639
d9a82a04 6640static int nfs4_xattr_get_nfs4_label(const struct xattr_handler *handler,
b296821a
AV		 6641 struct dentry *unused, struct inode *inode,
6642 const char *key, void *buf, size_t buflen)
c9bccef6
DQ		 6643{
6644 if (security_ismaclabel(key))
b296821a 6645 return nfs4_get_security_label(inode, buf, buflen);
c9bccef6
DQ		 6646 return -EOPNOTSUPP;
6647}
6648
c4803c49
AG		 6649static ssize_t
6650nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
c9bccef6 6651{
c4803c49 6652 int len = 0;
c9bccef6 6653
c4803c49
AG		 6654 if (nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) {
6655 len = security_inode_listsecurity(inode, list, list_len);
6656 if (list_len && len > list_len)
6657 return -ERANGE;
c9bccef6
DQ		 6658 }
6659 return len;
6660}
6661
6662static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
6663 .prefix = XATTR_SECURITY_PREFIX,
c9bccef6
DQ		 6664 .get = nfs4_xattr_get_nfs4_label,
6665 .set = nfs4_xattr_set_nfs4_label,
6666};
c9bccef6 6667
c4803c49
AG		 6668#else
6669
6670static ssize_t
6671nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
6672{
6673 return 0;
6674}
6675
6676#endif
c9bccef6 6677
533eb461
AA		 6678/*
6679 * nfs_fhget will use either the mounted_on_fileid or the fileid
6680 */
69aaaae1
TM		 6681static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6682{
533eb461
AA		 6683 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6684 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6685 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 6686 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 6687 return;
6688
6689 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 6690 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 6691 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6692 fattr->nlink = 2;
6693}
6694
f05d147f
BS		 6695static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6696 const struct qstr *name,
6697 struct nfs4_fs_locations *fs_locations,
6698 struct page *page)
683b57b4
TM		 6699{
6700 struct nfs_server *server = NFS_SERVER(dir);
a09df2ca 6701 u32 bitmask[3] = {
361e624f 6702 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 6703 };
6704 struct nfs4_fs_locations_arg args = {
6705 .dir_fh = NFS_FH(dir),
c228fd3a 6706 .name = name,
683b57b4
TM		 6707 .page = page,
6708 .bitmask = bitmask,
6709 };
22958463
BH		 6710 struct nfs4_fs_locations_res res = {
6711 .fs_locations = fs_locations,
6712 };
683b57b4
TM		 6713 struct rpc_message msg = {
6714 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6715 .rpc_argp = &args,
22958463 6716 .rpc_resp = &res,
683b57b4
TM		 6717 };
6718 int status;
6719
3110ff80 6720 dprintk("%s: start\n", __func__);
533eb461
AA		 6721
6722 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6723 * is not supported */
6724 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6725 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6726 else
6727 bitmask[0] |= FATTR4_WORD0_FILEID;
6728
c228fd3a 6729 nfs_fattr_init(&fs_locations->fattr);
683b57b4 6730 fs_locations->server = server;
830b8e33 6731 fs_locations->nlocations = 0;
f05d147f 6732 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 6733 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 6734 return status;
6735}
6736
f05d147f
BS		 6737int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6738 const struct qstr *name,
6739 struct nfs4_fs_locations *fs_locations,
6740 struct page *page)
db0a9593
BS		 6741{
6742 struct nfs4_exception exception = { };
6743 int err;
6744 do {
078ea3df
TM		 6745 err = _nfs4_proc_fs_locations(client, dir, name,
6746 fs_locations, page);
6747 trace_nfs4_get_fs_locations(dir, name, err);
6748 err = nfs4_handle_exception(NFS_SERVER(dir), err,
db0a9593
BS		 6749 &exception);
6750 } while (exception.retry);
6751 return err;
6752}
6753
b03d735b
CL		 6754/*
6755 * This operation also signals the server that this client is
6756 * performing migration recovery. The server can stop returning
6757 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6758 * appended to this compound to identify the client ID which is
6759 * performing recovery.
6760 */
6761static int _nfs40_proc_get_locations(struct inode *inode,
6762 struct nfs4_fs_locations *locations,
6763 struct page *page, struct rpc_cred *cred)
6764{
6765 struct nfs_server *server = NFS_SERVER(inode);
6766 struct rpc_clnt *clnt = server->client;
6767 u32 bitmask[2] = {
6768 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6769 };
6770 struct nfs4_fs_locations_arg args = {
6771 .clientid = server->nfs_client->cl_clientid,
6772 .fh = NFS_FH(inode),
6773 .page = page,
6774 .bitmask = bitmask,
6775 .migration = 1, /* skip LOOKUP */
6776 .renew = 1, /* append RENEW */
6777 };
6778 struct nfs4_fs_locations_res res = {
6779 .fs_locations = locations,
6780 .migration = 1,
6781 .renew = 1,
6782 };
6783 struct rpc_message msg = {
6784 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6785 .rpc_argp = &args,
6786 .rpc_resp = &res,
6787 .rpc_cred = cred,
6788 };
6789 unsigned long now = jiffies;
6790 int status;
6791
6792 nfs_fattr_init(&locations->fattr);
6793 locations->server = server;
6794 locations->nlocations = 0;
6795
6796 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6797 nfs4_set_sequence_privileged(&args.seq_args);
6798 status = nfs4_call_sync_sequence(clnt, server, &msg,
6799 &args.seq_args, &res.seq_res);
6800 if (status)
6801 return status;
6802
6803 renew_lease(server, now);
6804 return 0;
6805}
6806
6807#ifdef CONFIG_NFS_V4_1
6808
6809/*
6810 * This operation also signals the server that this client is
6811 * performing migration recovery. The server can stop asserting
6812 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6813 * performing this operation is identified in the SEQUENCE
6814 * operation in this compound.
6815 *
6816 * When the client supports GETATTR(fs_locations_info), it can
6817 * be plumbed in here.
6818 */
6819static int _nfs41_proc_get_locations(struct inode *inode,
6820 struct nfs4_fs_locations *locations,
6821 struct page *page, struct rpc_cred *cred)
6822{
6823 struct nfs_server *server = NFS_SERVER(inode);
6824 struct rpc_clnt *clnt = server->client;
6825 u32 bitmask[2] = {
6826 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6827 };
6828 struct nfs4_fs_locations_arg args = {
6829 .fh = NFS_FH(inode),
6830 .page = page,
6831 .bitmask = bitmask,
6832 .migration = 1, /* skip LOOKUP */
6833 };
6834 struct nfs4_fs_locations_res res = {
6835 .fs_locations = locations,
6836 .migration = 1,
6837 };
6838 struct rpc_message msg = {
6839 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6840 .rpc_argp = &args,
6841 .rpc_resp = &res,
6842 .rpc_cred = cred,
6843 };
6844 int status;
6845
6846 nfs_fattr_init(&locations->fattr);
6847 locations->server = server;
6848 locations->nlocations = 0;
6849
6850 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6851 nfs4_set_sequence_privileged(&args.seq_args);
6852 status = nfs4_call_sync_sequence(clnt, server, &msg,
6853 &args.seq_args, &res.seq_res);
6854 if (status == NFS4_OK &&
6855 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6856 status = -NFS4ERR_LEASE_MOVED;
6857 return status;
6858}
6859
6860#endif /* CONFIG_NFS_V4_1 */
6861
6862/**
6863 * nfs4_proc_get_locations - discover locations for a migrated FSID
6864 * @inode: inode on FSID that is migrating
6865 * @locations: result of query
6866 * @page: buffer
6867 * @cred: credential to use for this operation
6868 *
6869 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6870 * operation failed, or a negative errno if a local error occurred.
6871 *
6872 * On success, "locations" is filled in, but if the server has
6873 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6874 * asserted.
6875 *
6876 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6877 * from this client that require migration recovery.
6878 */
6879int nfs4_proc_get_locations(struct inode *inode,
6880 struct nfs4_fs_locations *locations,
6881 struct page *page, struct rpc_cred *cred)
6882{
6883 struct nfs_server *server = NFS_SERVER(inode);
6884 struct nfs_client *clp = server->nfs_client;
6885 const struct nfs4_mig_recovery_ops *ops =
6886 clp->cl_mvops->mig_recovery_ops;
6887 struct nfs4_exception exception = { };
6888 int status;
6889
6890 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6891 (unsigned long long)server->fsid.major,
6892 (unsigned long long)server->fsid.minor,
6893 clp->cl_hostname);
6894 nfs_display_fhandle(NFS_FH(inode), __func__);
6895
6896 do {
6897 status = ops->get_locations(inode, locations, page, cred);
6898 if (status != -NFS4ERR_DELAY)
6899 break;
6900 nfs4_handle_exception(server, status, &exception);
6901 } while (exception.retry);
6902 return status;
6903}
6904
44c99933
CL		 6905/*
6906 * This operation also signals the server that this client is
6907 * performing "lease moved" recovery. The server can stop
6908 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6909 * is appended to this compound to identify the client ID which is
6910 * performing recovery.
6911 */
6912static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6913{
6914 struct nfs_server *server = NFS_SERVER(inode);
6915 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6916 struct rpc_clnt *clnt = server->client;
6917 struct nfs4_fsid_present_arg args = {
6918 .fh = NFS_FH(inode),
6919 .clientid = clp->cl_clientid,
6920 .renew = 1, /* append RENEW */
6921 };
6922 struct nfs4_fsid_present_res res = {
6923 .renew = 1,
6924 };
6925 struct rpc_message msg = {
6926 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6927 .rpc_argp = &args,
6928 .rpc_resp = &res,
6929 .rpc_cred = cred,
6930 };
6931 unsigned long now = jiffies;
6932 int status;
6933
6934 res.fh = nfs_alloc_fhandle();
6935 if (res.fh == NULL)
6936 return -ENOMEM;
6937
6938 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6939 nfs4_set_sequence_privileged(&args.seq_args);
6940 status = nfs4_call_sync_sequence(clnt, server, &msg,
6941 &args.seq_args, &res.seq_res);
6942 nfs_free_fhandle(res.fh);
6943 if (status)
6944 return status;
6945
6946 do_renew_lease(clp, now);
6947 return 0;
6948}
6949
6950#ifdef CONFIG_NFS_V4_1
6951
6952/*
6953 * This operation also signals the server that this client is
6954 * performing "lease moved" recovery. The server can stop asserting
6955 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
6956 * this operation is identified in the SEQUENCE operation in this
6957 * compound.
6958 */
6959static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6960{
6961 struct nfs_server *server = NFS_SERVER(inode);
6962 struct rpc_clnt *clnt = server->client;
6963 struct nfs4_fsid_present_arg args = {
6964 .fh = NFS_FH(inode),
6965 };
6966 struct nfs4_fsid_present_res res = {
6967 };
6968 struct rpc_message msg = {
6969 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6970 .rpc_argp = &args,
6971 .rpc_resp = &res,
6972 .rpc_cred = cred,
6973 };
6974 int status;
6975
6976 res.fh = nfs_alloc_fhandle();
6977 if (res.fh == NULL)
6978 return -ENOMEM;
6979
6980 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6981 nfs4_set_sequence_privileged(&args.seq_args);
6982 status = nfs4_call_sync_sequence(clnt, server, &msg,
6983 &args.seq_args, &res.seq_res);
6984 nfs_free_fhandle(res.fh);
6985 if (status == NFS4_OK &&
6986 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6987 status = -NFS4ERR_LEASE_MOVED;
6988 return status;
6989}
6990
6991#endif /* CONFIG_NFS_V4_1 */
6992
6993/**
6994 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
6995 * @inode: inode on FSID to check
6996 * @cred: credential to use for this operation
6997 *
6998 * Server indicates whether the FSID is present, moved, or not
6999 * recognized. This operation is necessary to clear a LEASE_MOVED
7000 * condition for this client ID.
7001 *
7002 * Returns NFS4_OK if the FSID is present on this server,
7003 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
7004 * NFS4ERR code if some error occurred on the server, or a
7005 * negative errno if a local failure occurred.
7006 */
7007int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
7008{
7009 struct nfs_server *server = NFS_SERVER(inode);
7010 struct nfs_client *clp = server->nfs_client;
7011 const struct nfs4_mig_recovery_ops *ops =
7012 clp->cl_mvops->mig_recovery_ops;
7013 struct nfs4_exception exception = { };
7014 int status;
7015
7016 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
7017 (unsigned long long)server->fsid.major,
7018 (unsigned long long)server->fsid.minor,
7019 clp->cl_hostname);
7020 nfs_display_fhandle(NFS_FH(inode), __func__);
7021
7022 do {
7023 status = ops->fsid_present(inode, cred);
7024 if (status != -NFS4ERR_DELAY)
7025 break;
7026 nfs4_handle_exception(server, status, &exception);
7027 } while (exception.retry);
7028 return status;
7029}
7030
5ec16a85 7031/**
a5250def
WAA		 7032 * If 'use_integrity' is true and the state managment nfs_client
7033 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
7034 * and the machine credential as per RFC3530bis and RFC5661 Security
7035 * Considerations sections. Otherwise, just use the user cred with the
7036 * filesystem's rpc_client.
5ec16a85 7037 */
a5250def 7038static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
5a5ea0d4
BS		 7039{
7040 int status;
7041 struct nfs4_secinfo_arg args = {
7042 .dir_fh = NFS_FH(dir),
7043 .name = name,
7044 };
7045 struct nfs4_secinfo_res res = {
7046 .flavors = flavors,
7047 };
7048 struct rpc_message msg = {
7049 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
7050 .rpc_argp = &args,
7051 .rpc_resp = &res,
7052 };
a5250def 7053 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
7cb852df 7054 struct rpc_cred *cred = NULL;
a5250def
WAA		 7055
7056 if (use_integrity) {
7057 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
7cb852df
WAA		 7058 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
7059 msg.rpc_cred = cred;
a5250def 7060 }
5a5ea0d4
BS		 7061
7062 dprintk("NFS call secinfo %s\n", name->name);
8b5bee2e
WAA		 7063
7064 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
7065 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
7066
a5250def
WAA		 7067 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
7068 &res.seq_res, 0);
5a5ea0d4 7069 dprintk("NFS reply secinfo: %d\n", status);
a5250def 7070
7cb852df
WAA		 7071 if (cred)
7072 put_rpccred(cred);
a5250def 7073
5a5ea0d4
BS		 7074 return status;
7075}
7076
72de53ec
BS		 7077int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
7078 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 7079{
7080 struct nfs4_exception exception = { };
7081 int err;
7082 do {
a5250def
WAA		 7083 err = -NFS4ERR_WRONGSEC;
7084
7085 /* try to use integrity protection with machine cred */
7086 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
7087 err = _nfs4_proc_secinfo(dir, name, flavors, true);
7088
7089 /*
7090 * if unable to use integrity protection, or SECINFO with
7091 * integrity protection returns NFS4ERR_WRONGSEC (which is
7092 * disallowed by spec, but exists in deployed servers) use
7093 * the current filesystem's rpc_client and the user cred.
7094 */
7095 if (err == -NFS4ERR_WRONGSEC)
7096 err = _nfs4_proc_secinfo(dir, name, flavors, false);
7097
078ea3df
TM		 7098 trace_nfs4_secinfo(dir, name, err);
7099 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5a5ea0d4
BS		 7100 &exception);
7101 } while (exception.retry);
7102 return err;
7103}
7104
557134a3 7105#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 7106/*
7107 * Check the exchange flags returned by the server for invalid flags, having
7108 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
7109 * DS flags set.
7110 */
7111static int nfs4_check_cl_exchange_flags(u32 flags)
7112{
7113 if (flags & ~EXCHGID4_FLAG_MASK_R)
7114 goto out_inval;
7115 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
7116 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
7117 goto out_inval;
7118 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
7119 goto out_inval;
7120 return NFS_OK;
7121out_inval:
7122 return -NFS4ERR_INVAL;
7123}
7124
78fe0f41 7125static bool
79d4e1f0
CL		 7126nfs41_same_server_scope(struct nfs41_server_scope *a,
7127 struct nfs41_server_scope *b)
78fe0f41
WAA		 7128{
7129 if (a->server_scope_sz == b->server_scope_sz &&
7130 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
7131 return true;
7132
7133 return false;
7134}
7135
02a95dee
AA		 7136static void
7137nfs4_bind_one_conn_to_session_done(struct rpc_task *task, void *calldata)
7138{
7139}
7140
7141static const struct rpc_call_ops nfs4_bind_one_conn_to_session_ops = {
7142 .rpc_call_done = &nfs4_bind_one_conn_to_session_done,
7143};
7144
7c44f1ae 7145/*
d9ddbf5d 7146 * nfs4_proc_bind_one_conn_to_session()
7c44f1ae
WAA		 7147 *
7148 * The 4.1 client currently uses the same TCP connection for the
7149 * fore and backchannel.
7150 */
d9ddbf5d
TM		 7151static
7152int nfs4_proc_bind_one_conn_to_session(struct rpc_clnt *clnt,
7153 struct rpc_xprt *xprt,
7154 struct nfs_client *clp,
7155 struct rpc_cred *cred)
7c44f1ae
WAA		 7156{
7157 int status;
71a097c6
TM		 7158 struct nfs41_bind_conn_to_session_args args = {
7159 .client = clp,
7160 .dir = NFS4_CDFC4_FORE_OR_BOTH,
7161 };
7c44f1ae
WAA		 7162 struct nfs41_bind_conn_to_session_res res;
7163 struct rpc_message msg = {
7164 .rpc_proc =
7165 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
71a097c6 7166 .rpc_argp = &args,
7c44f1ae 7167 .rpc_resp = &res,
2cf047c9 7168 .rpc_cred = cred,
7c44f1ae 7169 };
d9ddbf5d
TM		 7170 struct rpc_task_setup task_setup_data = {
7171 .rpc_client = clnt,
7172 .rpc_xprt = xprt,
02a95dee 7173 .callback_ops = &nfs4_bind_one_conn_to_session_ops,
d9ddbf5d
TM		 7174 .rpc_message = &msg,
7175 .flags = RPC_TASK_TIMEOUT,
7176 };
7177 struct rpc_task *task;
7c44f1ae
WAA		 7178
7179 dprintk("--> %s\n", __func__);
7c44f1ae 7180
71a097c6
TM		 7181 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id);
7182 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN))
7183 args.dir = NFS4_CDFC4_FORE;
7c44f1ae 7184
d9ddbf5d
TM		 7185 /* Do not set the backchannel flag unless this is clnt->cl_xprt */
7186 if (xprt != rcu_access_pointer(clnt->cl_xprt))
7187 args.dir = NFS4_CDFC4_FORE;
7188
7189 task = rpc_run_task(&task_setup_data);
7190 if (!IS_ERR(task)) {
7191 status = task->tk_status;
7192 rpc_put_task(task);
7193 } else
7194 status = PTR_ERR(task);
c6d01c6f 7195 trace_nfs4_bind_conn_to_session(clp, status);
7c44f1ae 7196 if (status == 0) {
71a097c6 7197 if (memcmp(res.sessionid.data,
7c44f1ae
WAA		 7198 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
7199 dprintk("NFS: %s: Session ID mismatch\n", __func__);
7200 status = -EIO;
71a097c6 7201 goto out;
7c44f1ae 7202 }
71a097c6 7203 if ((res.dir & args.dir) != res.dir || res.dir == 0) {
7c44f1ae
WAA		 7204 dprintk("NFS: %s: Unexpected direction from server\n",
7205 __func__);
7206 status = -EIO;
71a097c6 7207 goto out;
7c44f1ae 7208 }
71a097c6 7209 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) {
7c44f1ae
WAA		 7210 dprintk("NFS: %s: Server returned RDMA mode = true\n",
7211 __func__);
7212 status = -EIO;
71a097c6 7213 goto out;
7c44f1ae
WAA		 7214 }
7215 }
7c44f1ae
WAA		 7216out:
7217 dprintk("<-- %s status= %d\n", __func__, status);
7218 return status;
7219}
7220
d9ddbf5d
TM		 7221struct rpc_bind_conn_calldata {
7222 struct nfs_client *clp;
7223 struct rpc_cred *cred;
7224};
7225
7226static int
7227nfs4_proc_bind_conn_to_session_callback(struct rpc_clnt *clnt,
7228 struct rpc_xprt *xprt,
7229 void *calldata)
7230{
7231 struct rpc_bind_conn_calldata *p = calldata;
7232
7233 return nfs4_proc_bind_one_conn_to_session(clnt, xprt, p->clp, p->cred);
7234}
7235
7236int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7237{
7238 struct rpc_bind_conn_calldata data = {
7239 .clp = clp,
7240 .cred = cred,
7241 };
7242 return rpc_clnt_iterate_for_each_xprt(clp->cl_rpcclient,
7243 nfs4_proc_bind_conn_to_session_callback, &data);
7244}
7245
99fe60d0 7246/*
fa940720
WAA		 7247 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
7248 * and operations we'd like to see to enable certain features in the allow map
2031cd1a
WAA		 7249 */
7250static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
7251 .how = SP4_MACH_CRED,
7252 .enforce.u.words = {
7253 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
7254 1 << (OP_EXCHANGE_ID - 32) |
7255 1 << (OP_CREATE_SESSION - 32) |
7256 1 << (OP_DESTROY_SESSION - 32) |
7257 1 << (OP_DESTROY_CLIENTID - 32)
fa940720
WAA		 7258 },
7259 .allow.u.words = {
7260 [0] = 1 << (OP_CLOSE) |
99ade3c7 7261 1 << (OP_OPEN_DOWNGRADE) |
a0279625 7262 1 << (OP_LOCKU) |
99ade3c7 7263 1 << (OP_DELEGRETURN) |
a0279625 7264 1 << (OP_COMMIT),
8b5bee2e 7265 [1] = 1 << (OP_SECINFO - 32) |
3787d506 7266 1 << (OP_SECINFO_NO_NAME - 32) |
99ade3c7 7267 1 << (OP_LAYOUTRETURN - 32) |
3787d506 7268 1 << (OP_TEST_STATEID - 32) |
a0279625
WAA		 7269 1 << (OP_FREE_STATEID - 32) |
7270 1 << (OP_WRITE - 32)
2031cd1a
WAA		 7271 }
7272};
7273
7274/*
7275 * Select the state protection mode for client `clp' given the server results
7276 * from exchange_id in `sp'.
99fe60d0 7277 *
2031cd1a
WAA		 7278 * Returns 0 on success, negative errno otherwise.
7279 */
7280static int nfs4_sp4_select_mode(struct nfs_client *clp,
7281 struct nfs41_state_protection *sp)
7282{
7283 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
7284 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
7285 1 << (OP_EXCHANGE_ID - 32) |
7286 1 << (OP_CREATE_SESSION - 32) |
7287 1 << (OP_DESTROY_SESSION - 32) |
7288 1 << (OP_DESTROY_CLIENTID - 32)
7289 };
7290 unsigned int i;
7291
7292 if (sp->how == SP4_MACH_CRED) {
7293 /* Print state protect result */
7294 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
7295 for (i = 0; i <= LAST_NFS4_OP; i++) {
7296 if (test_bit(i, sp->enforce.u.longs))
7297 dfprintk(MOUNT, " enforce op %d\n", i);
7298 if (test_bit(i, sp->allow.u.longs))
7299 dfprintk(MOUNT, " allow op %d\n", i);
7300 }
7301
7302 /* make sure nothing is on enforce list that isn't supported */
7303 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
7304 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
7305 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
7306 return -EINVAL;
7307 }
7308 }
7309
7310 /*
7311 * Minimal mode - state operations are allowed to use machine
7312 * credential. Note this already happens by default, so the
7313 * client doesn't have to do anything more than the negotiation.
7314 *
7315 * NOTE: we don't care if EXCHANGE_ID is in the list -
7316 * we're already using the machine cred for exchange_id
7317 * and will never use a different cred.
7318 */
7319 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
7320 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
7321 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
7322 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
7323 dfprintk(MOUNT, "sp4_mach_cred:\n");
7324 dfprintk(MOUNT, " minimal mode enabled\n");
7325 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
7326 } else {
7327 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
7328 return -EINVAL;
7329 }
fa940720
WAA		 7330
7331 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
99ade3c7
AE		 7332 test_bit(OP_OPEN_DOWNGRADE, sp->allow.u.longs) &&
7333 test_bit(OP_DELEGRETURN, sp->allow.u.longs) &&
fa940720
WAA		 7334 test_bit(OP_LOCKU, sp->allow.u.longs)) {
7335 dfprintk(MOUNT, " cleanup mode enabled\n");
7336 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
7337 }
8b5bee2e 7338
99ade3c7
AE		 7339 if (test_bit(OP_LAYOUTRETURN, sp->allow.u.longs)) {
7340 dfprintk(MOUNT, " pnfs cleanup mode enabled\n");
7341 set_bit(NFS_SP4_MACH_CRED_PNFS_CLEANUP,
7342 &clp->cl_sp4_flags);
7343 }
7344
8b5bee2e
WAA		 7345 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
7346 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
7347 dfprintk(MOUNT, " secinfo mode enabled\n");
7348 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
7349 }
3787d506
WAA		 7350
7351 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
7352 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
7353 dfprintk(MOUNT, " stateid mode enabled\n");
7354 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
7355 }
8c21c62c
WAA		 7356
7357 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
7358 dfprintk(MOUNT, " write mode enabled\n");
7359 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
7360 }
7361
7362 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
7363 dfprintk(MOUNT, " commit mode enabled\n");
7364 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
7365 }
2031cd1a
WAA		 7366 }
7367
7368 return 0;
7369}
7370
8d89bd70
AA		 7371struct nfs41_exchange_id_data {
7372 struct nfs41_exchange_id_res res;
7373 struct nfs41_exchange_id_args args;
ad0849a7 7374 struct rpc_xprt *xprt;
8d89bd70
AA		 7375 int rpc_status;
7376};
7377
7378static void nfs4_exchange_id_done(struct rpc_task *task, void *data)
7379{
7380 struct nfs41_exchange_id_data *cdata =
7381 (struct nfs41_exchange_id_data *)data;
7382 struct nfs_client *clp = cdata->args.client;
7383 int status = task->tk_status;
7384
7385 trace_nfs4_exchange_id(clp, status);
7386
7387 if (status == 0)
7388 status = nfs4_check_cl_exchange_flags(cdata->res.flags);
ad0849a7
AA		 7389
7390 if (cdata->xprt && status == 0) {
7391 status = nfs4_detect_session_trunking(clp, &cdata->res,
7392 cdata->xprt);
7393 goto out;
7394 }
7395
8d89bd70
AA		 7396 if (status == 0)
7397 status = nfs4_sp4_select_mode(clp, &cdata->res.state_protect);
7398
7399 if (status == 0) {
7400 clp->cl_clientid = cdata->res.clientid;
7401 clp->cl_exchange_flags = cdata->res.flags;
7402 /* Client ID is not confirmed */
7403 if (!(cdata->res.flags & EXCHGID4_FLAG_CONFIRMED_R)) {
7404 clear_bit(NFS4_SESSION_ESTABLISHED,
7405 &clp->cl_session->session_state);
7406 clp->cl_seqid = cdata->res.seqid;
7407 }
7408
7409 kfree(clp->cl_serverowner);
7410 clp->cl_serverowner = cdata->res.server_owner;
7411 cdata->res.server_owner = NULL;
7412
7413 /* use the most recent implementation id */
7414 kfree(clp->cl_implid);
7415 clp->cl_implid = cdata->res.impl_id;
7416 cdata->res.impl_id = NULL;
7417
7418 if (clp->cl_serverscope != NULL &&
7419 !nfs41_same_server_scope(clp->cl_serverscope,
7420 cdata->res.server_scope)) {
7421 dprintk("%s: server_scope mismatch detected\n",
7422 __func__);
7423 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
7424 kfree(clp->cl_serverscope);
7425 clp->cl_serverscope = NULL;
7426 }
7427
7428 if (clp->cl_serverscope == NULL) {
7429 clp->cl_serverscope = cdata->res.server_scope;
7430 cdata->res.server_scope = NULL;
7431 }
ad0849a7
AA		 7432 /* Save the EXCHANGE_ID verifier session trunk tests */
7433 memcpy(clp->cl_confirm.data, cdata->args.verifier->data,
7434 sizeof(clp->cl_confirm.data));
8d89bd70 7435 }
ad0849a7 7436out:
8d89bd70 7437 cdata->rpc_status = status;
ad0849a7 7438 return;
8d89bd70
AA		 7439}
7440
7441static void nfs4_exchange_id_release(void *data)
7442{
7443 struct nfs41_exchange_id_data *cdata =
7444 (struct nfs41_exchange_id_data *)data;
7445
7446 nfs_put_client(cdata->args.client);
ad0849a7
AA		 7447 if (cdata->xprt) {
7448 xprt_put(cdata->xprt);
7449 rpc_clnt_xprt_switch_put(cdata->args.client->cl_rpcclient);
7450 }
8d89bd70
AA		 7451 kfree(cdata->res.impl_id);
7452 kfree(cdata->res.server_scope);
7453 kfree(cdata->res.server_owner);
7454 kfree(cdata);
7455}
7456
7457static const struct rpc_call_ops nfs4_exchange_id_call_ops = {
7458 .rpc_call_done = nfs4_exchange_id_done,
7459 .rpc_release = nfs4_exchange_id_release,
7460};
7461
2031cd1a
WAA		 7462/*
7463 * _nfs4_proc_exchange_id()
6bbb4ae8 7464 *
2031cd1a 7465 * Wrapper for EXCHANGE_ID operation.
99fe60d0 7466 */
2031cd1a 7467static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
ad0849a7 7468 u32 sp4_how, struct rpc_xprt *xprt)
99fe60d0
BH		 7469{
7470 nfs4_verifier verifier;
99fe60d0
BH		 7471 struct rpc_message msg = {
7472 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
99fe60d0
BH		 7473 .rpc_cred = cred,
7474 };
8d89bd70
AA		 7475 struct rpc_task_setup task_setup_data = {
7476 .rpc_client = clp->cl_rpcclient,
7477 .callback_ops = &nfs4_exchange_id_call_ops,
7478 .rpc_message = &msg,
7479 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
7480 };
7481 struct nfs41_exchange_id_data *calldata;
7482 struct rpc_task *task;
7483 int status = -EIO;
7484
7485 if (!atomic_inc_not_zero(&clp->cl_count))
7486 goto out;
7487
7488 status = -ENOMEM;
7489 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
7490 if (!calldata)
7491 goto out;
99fe60d0 7492
ad0849a7
AA		 7493 if (!xprt)
7494 nfs4_init_boot_verifier(clp, &verifier);
873e3851
JL		 7495
7496 status = nfs4_init_uniform_client_string(clp);
7497 if (status)
8d89bd70 7498 goto out_calldata;
3a6bb738
JL		 7499
7500 dprintk("NFS call exchange_id auth=%s, '%s'\n",
6bbb4ae8 7501 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3a6bb738 7502 clp->cl_owner_id);
99fe60d0 7503
8d89bd70
AA		 7504 calldata->res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
7505 GFP_NOFS);
7506 status = -ENOMEM;
7507 if (unlikely(calldata->res.server_owner == NULL))
7508 goto out_calldata;
78fe0f41 7509
8d89bd70 7510 calldata->res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 7511 GFP_NOFS);
8d89bd70 7512 if (unlikely(calldata->res.server_scope == NULL))
acdeb69d 7513 goto out_server_owner;
78fe0f41 7514
8d89bd70
AA		 7515 calldata->res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
7516 if (unlikely(calldata->res.impl_id == NULL))
7d2ed9ac 7517 goto out_server_scope;
7d2ed9ac 7518
2031cd1a
WAA		 7519 switch (sp4_how) {
7520 case SP4_NONE:
8d89bd70 7521 calldata->args.state_protect.how = SP4_NONE;
2031cd1a
WAA		 7522 break;
7523
7524 case SP4_MACH_CRED:
8d89bd70 7525 calldata->args.state_protect = nfs4_sp4_mach_cred_request;
2031cd1a
WAA		 7526 break;
7527
7528 default:
7529 /* unsupported! */
7530 WARN_ON_ONCE(1);
7531 status = -EINVAL;
6b55970b 7532 goto out_impl_id;
2031cd1a 7533 }
ad0849a7
AA		 7534 if (xprt) {
7535 calldata->xprt = xprt;
7536 task_setup_data.rpc_xprt = xprt;
7537 task_setup_data.flags =
7538 RPC_TASK_SOFT|RPC_TASK_SOFTCONN|RPC_TASK_ASYNC;
7539 calldata->args.verifier = &clp->cl_confirm;
7540 } else {
7541 calldata->args.verifier = &verifier;
7542 }
8d89bd70
AA		 7543 calldata->args.client = clp;
7544#ifdef CONFIG_NFS_V4_1_MIGRATION
7545 calldata->args.flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
7546 EXCHGID4_FLAG_BIND_PRINC_STATEID |
7547 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
7548#else
7549 calldata->args.flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
7550 EXCHGID4_FLAG_BIND_PRINC_STATEID,
7551#endif
7552 msg.rpc_argp = &calldata->args;
7553 msg.rpc_resp = &calldata->res;
7554 task_setup_data.callback_data = calldata;
2031cd1a 7555
8d89bd70
AA		 7556 task = rpc_run_task(&task_setup_data);
7557 if (IS_ERR(task)) {
7558 status = PTR_ERR(task);
7559 goto out_impl_id;
6b55970b 7560 }
7d2ed9ac 7561
ad0849a7
AA		 7562 if (!xprt) {
7563 status = rpc_wait_for_completion_task(task);
7564 if (!status)
7565 status = calldata->rpc_status;
7566 } else /* session trunking test */
8d89bd70 7567 status = calldata->rpc_status;
ad0849a7 7568
8d89bd70 7569 rpc_put_task(task);
abe9a6d5 7570out:
177313f1 7571 if (clp->cl_implid != NULL)
6bbb4ae8 7572 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 7573 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 7574 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 7575 clp->cl_implid->date.seconds,
7576 clp->cl_implid->date.nseconds);
6bbb4ae8 7577 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0 7578 return status;
8d89bd70
AA		 7579
7580out_impl_id:
7581 kfree(calldata->res.impl_id);
7582out_server_scope:
7583 kfree(calldata->res.server_scope);
7584out_server_owner:
7585 kfree(calldata->res.server_owner);
7586out_calldata:
7587 kfree(calldata);
7588 goto out;
99fe60d0
BH		 7589}
7590
2031cd1a
WAA		 7591/*
7592 * nfs4_proc_exchange_id()
7593 *
7594 * Returns zero, a negative errno, or a negative NFS4ERR status code.
7595 *
7596 * Since the clientid has expired, all compounds using sessions
7597 * associated with the stale clientid will be returning
7598 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
7599 * be in some phase of session reset.
7600 *
7601 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
7602 */
7603int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
7604{
7605 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
7606 int status;
7607
7608 /* try SP4_MACH_CRED if krb5i/p */
7609 if (authflavor == RPC_AUTH_GSS_KRB5I ||
7610 authflavor == RPC_AUTH_GSS_KRB5P) {
ad0849a7 7611 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED, NULL);
2031cd1a
WAA		 7612 if (!status)
7613 return 0;
7614 }
7615
7616 /* try SP4_NONE */
ad0849a7 7617 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE, NULL);
2031cd1a
WAA		 7618}
7619
04fa2c6b
AA		 7620/**
7621 * nfs4_test_session_trunk
7622 *
7623 * This is an add_xprt_test() test function called from
7624 * rpc_clnt_setup_test_and_add_xprt.
7625 *
7626 * The rpc_xprt_switch is referrenced by rpc_clnt_setup_test_and_add_xprt
7627 * and is dereferrenced in nfs4_exchange_id_release
7628 *
7629 * Upon success, add the new transport to the rpc_clnt
7630 *
7631 * @clnt: struct rpc_clnt to get new transport
7632 * @xprt: the rpc_xprt to test
7633 * @data: call data for _nfs4_proc_exchange_id.
7634 */
7635int nfs4_test_session_trunk(struct rpc_clnt *clnt, struct rpc_xprt *xprt,
7636 void *data)
7637{
7638 struct nfs4_add_xprt_data *adata = (struct nfs4_add_xprt_data *)data;
7639 u32 sp4_how;
7640
7641 dprintk("--> %s try %s\n", __func__,
7642 xprt->address_strings[RPC_DISPLAY_ADDR]);
7643
7644 sp4_how = (adata->clp->cl_sp4_flags == 0 ? SP4_NONE : SP4_MACH_CRED);
7645
7646 /* Test connection for session trunking. Async exchange_id call */
7647 return _nfs4_proc_exchange_id(adata->clp, adata->cred, sp4_how, xprt);
2031cd1a 7648}
04fa2c6b 7649EXPORT_SYMBOL_GPL(nfs4_test_session_trunk);
2031cd1a 7650
66245539
TM		 7651static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
7652 struct rpc_cred *cred)
7653{
7654 struct rpc_message msg = {
7655 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
7656 .rpc_argp = clp,
7657 .rpc_cred = cred,
7658 };
7659 int status;
7660
7661 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7662 trace_nfs4_destroy_clientid(clp, status);
66245539 7663 if (status)
02c67525 7664 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 7665 "DESTROY_CLIENTID.", status, clp->cl_hostname);
7666 return status;
7667}
7668
7669static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
7670 struct rpc_cred *cred)
7671{
7672 unsigned int loop;
7673 int ret;
7674
7675 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
7676 ret = _nfs4_proc_destroy_clientid(clp, cred);
7677 switch (ret) {
7678 case -NFS4ERR_DELAY:
7679 case -NFS4ERR_CLIENTID_BUSY:
7680 ssleep(1);
7681 break;
7682 default:
7683 return ret;
7684 }
7685 }
7686 return 0;
7687}
7688
7689int nfs4_destroy_clientid(struct nfs_client *clp)
7690{
7691 struct rpc_cred *cred;
7692 int ret = 0;
7693
7694 if (clp->cl_mvops->minor_version < 1)
7695 goto out;
7696 if (clp->cl_exchange_flags == 0)
7697 goto out;
05f4c350
CL		 7698 if (clp->cl_preserve_clid)
7699 goto out;
73d8bde5 7700 cred = nfs4_get_clid_cred(clp);
66245539
TM		 7701 ret = nfs4_proc_destroy_clientid(clp, cred);
7702 if (cred)
7703 put_rpccred(cred);
7704 switch (ret) {
7705 case 0:
7706 case -NFS4ERR_STALE_CLIENTID:
7707 clp->cl_exchange_flags = 0;
7708 }
7709out:
7710 return ret;
7711}
7712
2050f0cc
AA		 7713struct nfs4_get_lease_time_data {
7714 struct nfs4_get_lease_time_args *args;
7715 struct nfs4_get_lease_time_res *res;
7716 struct nfs_client *clp;
7717};
7718
7719static void nfs4_get_lease_time_prepare(struct rpc_task *task,
7720 void *calldata)
7721{
2050f0cc
AA		 7722 struct nfs4_get_lease_time_data *data =
7723 (struct nfs4_get_lease_time_data *)calldata;
7724
7725 dprintk("--> %s\n", __func__);
7726 /* just setup sequence, do not trigger session recovery
7727 since we're invoked within one */
7981c8a6 7728 nfs4_setup_sequence(data->clp,
d9afbd1b
TM		 7729 &data->args->la_seq_args,
7730 &data->res->lr_seq_res,
7731 task);
2050f0cc
AA		 7732 dprintk("<-- %s\n", __func__);
7733}
7734
7735/*
7736 * Called from nfs4_state_manager thread for session setup, so don't recover
7737 * from sequence operation or clientid errors.
7738 */
7739static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
7740{
7741 struct nfs4_get_lease_time_data *data =
7742 (struct nfs4_get_lease_time_data *)calldata;
7743
7744 dprintk("--> %s\n", __func__);
14516c3a
TM		 7745 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
7746 return;
2050f0cc
AA		 7747 switch (task->tk_status) {
7748 case -NFS4ERR_DELAY:
7749 case -NFS4ERR_GRACE:
7750 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
7751 rpc_delay(task, NFS4_POLL_RETRY_MIN);
7752 task->tk_status = 0;
a8a4ae3a
AA		 7753 /* fall through */
7754 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 7755 rpc_restart_call_prepare(task);
2050f0cc
AA		 7756 return;
7757 }
2050f0cc
AA		 7758 dprintk("<-- %s\n", __func__);
7759}
7760
17280175 7761static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 7762 .rpc_call_prepare = nfs4_get_lease_time_prepare,
7763 .rpc_call_done = nfs4_get_lease_time_done,
7764};
7765
7766int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
7767{
7768 struct rpc_task *task;
7769 struct nfs4_get_lease_time_args args;
7770 struct nfs4_get_lease_time_res res = {
7771 .lr_fsinfo = fsinfo,
7772 };
7773 struct nfs4_get_lease_time_data data = {
7774 .args = &args,
7775 .res = &res,
7776 .clp = clp,
7777 };
7778 struct rpc_message msg = {
7779 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
7780 .rpc_argp = &args,
7781 .rpc_resp = &res,
7782 };
7783 struct rpc_task_setup task_setup = {
7784 .rpc_client = clp->cl_rpcclient,
7785 .rpc_message = &msg,
7786 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 7787 .callback_data = &data,
7788 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 7789 };
7790 int status;
7791
a9c92d6b 7792 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 7793 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 7794 dprintk("--> %s\n", __func__);
7795 task = rpc_run_task(&task_setup);
7796
7797 if (IS_ERR(task))
7798 status = PTR_ERR(task);
7799 else {
7800 status = task->tk_status;
7801 rpc_put_task(task);
7802 }
7803 dprintk("<-- %s return %d\n", __func__, status);
7804
7805 return status;
7806}
7807
fc931582
AA		 7808/*
7809 * Initialize the values to be used by the client in CREATE_SESSION
7810 * If nfs4_init_session set the fore channel request and response sizes,
7811 * use them.
7812 *
7813 * Set the back channel max_resp_sz_cached to zero to force the client to
7814 * always set csa_cachethis to FALSE because the current implementation
7815 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
7816 */
6b26cc8c
CL		 7817static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args,
7818 struct rpc_clnt *clnt)
fc931582 7819{
18aad3d5 7820 unsigned int max_rqst_sz, max_resp_sz;
6b26cc8c 7821 unsigned int max_bc_payload = rpc_max_bc_payload(clnt);
18aad3d5
AA		 7822
7823 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
7824 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 7825
fc931582 7826 /* Fore channel attributes */
18aad3d5
AA		 7827 args->fc_attrs.max_rqst_sz = max_rqst_sz;
7828 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 7829 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 7830 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 7831
7832 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 7833 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 7834 __func__,
7835 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 7836 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 7837
7838 /* Back channel attributes */
6b26cc8c
CL		 7839 args->bc_attrs.max_rqst_sz = max_bc_payload;
7840 args->bc_attrs.max_resp_sz = max_bc_payload;
fc931582
AA		 7841 args->bc_attrs.max_resp_sz_cached = 0;
7842 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5405fc44 7843 args->bc_attrs.max_reqs = min_t(unsigned short, max_session_cb_slots, 1);
fc931582
AA		 7844
7845 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
7846 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
7847 __func__,
7848 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
7849 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
7850 args->bc_attrs.max_reqs);
7851}
7852
79969dd1
TM		 7853static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args,
7854 struct nfs41_create_session_res *res)
8d35301d 7855{
43c2e885 7856 struct nfs4_channel_attrs *sent = &args->fc_attrs;
79969dd1 7857 struct nfs4_channel_attrs *rcvd = &res->fc_attrs;
43c2e885 7858
43c2e885
BF		 7859 if (rcvd->max_resp_sz > sent->max_resp_sz)
7860 return -EINVAL;
7861 /*
7862 * Our requested max_ops is the minimum we need; we're not
7863 * prepared to break up compounds into smaller pieces than that.
7864 * So, no point even trying to continue if the server won't
7865 * cooperate:
7866 */
7867 if (rcvd->max_ops < sent->max_ops)
7868 return -EINVAL;
7869 if (rcvd->max_reqs == 0)
7870 return -EINVAL;
b4b9a0c1
VG		 7871 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
7872 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 7873 return 0;
8d35301d
AA		 7874}
7875
79969dd1
TM		 7876static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args,
7877 struct nfs41_create_session_res *res)
43c2e885
BF		 7878{
7879 struct nfs4_channel_attrs *sent = &args->bc_attrs;
79969dd1 7880 struct nfs4_channel_attrs *rcvd = &res->bc_attrs;
8d35301d 7881
b1c0df5f
TM		 7882 if (!(res->flags & SESSION4_BACK_CHAN))
7883 goto out;
43c2e885
BF		 7884 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
7885 return -EINVAL;
7886 if (rcvd->max_resp_sz < sent->max_resp_sz)
7887 return -EINVAL;
7888 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7889 return -EINVAL;
5405fc44 7890 if (rcvd->max_ops > sent->max_ops)
43c2e885 7891 return -EINVAL;
5405fc44 7892 if (rcvd->max_reqs > sent->max_reqs)
43c2e885 7893 return -EINVAL;
b1c0df5f 7894out:
43c2e885
BF		 7895 return 0;
7896}
8d35301d 7897
8d35301d 7898static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
79969dd1 7899 struct nfs41_create_session_res *res)
8d35301d 7900{
43c2e885 7901 int ret;
8d35301d 7902
79969dd1 7903 ret = nfs4_verify_fore_channel_attrs(args, res);
43c2e885
BF		 7904 if (ret)
7905 return ret;
79969dd1
TM		 7906 return nfs4_verify_back_channel_attrs(args, res);
7907}
7908
7909static void nfs4_update_session(struct nfs4_session *session,
7910 struct nfs41_create_session_res *res)
7911{
7912 nfs4_copy_sessionid(&session->sess_id, &res->sessionid);
e11259f9
TM		 7913 /* Mark client id and session as being confirmed */
7914 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;
7915 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state);
79969dd1
TM		 7916 session->flags = res->flags;
7917 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs));
b1c0df5f
TM		 7918 if (res->flags & SESSION4_BACK_CHAN)
7919 memcpy(&session->bc_attrs, &res->bc_attrs,
7920 sizeof(session->bc_attrs));
8d35301d
AA		 7921}
7922
848f5bda
TM		 7923static int _nfs4_proc_create_session(struct nfs_client *clp,
7924 struct rpc_cred *cred)
fc931582
AA		 7925{
7926 struct nfs4_session *session = clp->cl_session;
7927 struct nfs41_create_session_args args = {
7928 .client = clp,
79969dd1
TM		 7929 .clientid = clp->cl_clientid,
7930 .seqid = clp->cl_seqid,
fc931582
AA		 7931 .cb_program = NFS4_CALLBACK,
7932 };
79969dd1
TM		 7933 struct nfs41_create_session_res res;
7934
fc931582
AA		 7935 struct rpc_message msg = {
7936 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
7937 .rpc_argp = &args,
7938 .rpc_resp = &res,
848f5bda 7939 .rpc_cred = cred,
fc931582
AA		 7940 };
7941 int status;
7942
6b26cc8c 7943 nfs4_init_channel_attrs(&args, clp->cl_rpcclient);
0f91421e 7944 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 7945
1bd714f2 7946 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7947 trace_nfs4_create_session(clp, status);
fc931582 7948
b519d408
TM		 7949 switch (status) {
7950 case -NFS4ERR_STALE_CLIENTID:
7951 case -NFS4ERR_DELAY:
7952 case -ETIMEDOUT:
7953 case -EACCES:
7954 case -EAGAIN:
7955 goto out;
7956 };
7957
7958 clp->cl_seqid++;
43095d39 7959 if (!status) {
8d35301d 7960 /* Verify the session's negotiated channel_attrs values */
79969dd1 7961 status = nfs4_verify_channel_attrs(&args, &res);
fc931582 7962 /* Increment the clientid slot sequence id */
79969dd1
TM		 7963 if (status)
7964 goto out;
7965 nfs4_update_session(session, &res);
fc931582 7966 }
79969dd1 7967out:
fc931582
AA		 7968 return status;
7969}
7970
7971/*
7972 * Issues a CREATE_SESSION operation to the server.
7973 * It is the responsibility of the caller to verify the session is
7974 * expired before calling this routine.
7975 */
848f5bda 7976int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 7977{
7978 int status;
7979 unsigned *ptr;
fc931582
AA		 7980 struct nfs4_session *session = clp->cl_session;
7981
7982 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
7983
848f5bda 7984 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 7985 if (status)
7986 goto out;
7987
aacd5537
AA		 7988 /* Init or reset the session slot tables */
7989 status = nfs4_setup_session_slot_tables(session);
7990 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 7991 if (status)
7992 goto out;
7993
7994 ptr = (unsigned *)&session->sess_id.data[0];
7995 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
7996 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 7997out:
7998 dprintk("<-- %s\n", __func__);
7999 return status;
8000}
8001
0f3e66c6
AA		 8002/*
8003 * Issue the over-the-wire RPC DESTROY_SESSION.
8004 * The caller must serialize access to this routine.
8005 */
848f5bda
TM		 8006int nfs4_proc_destroy_session(struct nfs4_session *session,
8007 struct rpc_cred *cred)
0f3e66c6 8008{
848f5bda
TM		 8009 struct rpc_message msg = {
8010 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
8011 .rpc_argp = session,
8012 .rpc_cred = cred,
8013 };
0f3e66c6 8014 int status = 0;
0f3e66c6
AA		 8015
8016 dprintk("--> nfs4_proc_destroy_session\n");
8017
8018 /* session is still being setup */
e11259f9
TM		 8019 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state))
8020 return 0;
0f3e66c6 8021
1bd714f2 8022 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 8023 trace_nfs4_destroy_session(session->clp, status);
0f3e66c6
AA		 8024
8025 if (status)
08106ac7 8026 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 8027 "Session has been destroyed regardless...\n", status);
8028
8029 dprintk("<-- nfs4_proc_destroy_session\n");
8030 return status;
8031}
8032
fc01cea9
AA		 8033/*
8034 * Renew the cl_session lease.
8035 */
d5f8d3fe
TM		 8036struct nfs4_sequence_data {
8037 struct nfs_client *clp;
8038 struct nfs4_sequence_args args;
8039 struct nfs4_sequence_res res;
8040};
8041
dc96aef9
AB		 8042static void nfs41_sequence_release(void *data)
8043{
d5f8d3fe
TM		 8044 struct nfs4_sequence_data *calldata = data;
8045 struct nfs_client *clp = calldata->clp;
dc96aef9 8046
7135840f
AB		 8047 if (atomic_read(&clp->cl_count) > 1)
8048 nfs4_schedule_state_renewal(clp);
8049 nfs_put_client(clp);
d5f8d3fe 8050 kfree(calldata);
dc96aef9
AB		 8051}
8052
aa5190d0
TM		 8053static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
8054{
8055 switch(task->tk_status) {
8056 case -NFS4ERR_DELAY:
aa5190d0
TM		 8057 rpc_delay(task, NFS4_POLL_RETRY_MAX);
8058 return -EAGAIN;
8059 default:
0400a6b0 8060 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 8061 }
8062 return 0;
8063}
8064
dc96aef9 8065static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 8066{
d5f8d3fe
TM		 8067 struct nfs4_sequence_data *calldata = data;
8068 struct nfs_client *clp = calldata->clp;
fc01cea9 8069
14516c3a
TM		 8070 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
8071 return;
fc01cea9 8072
c6d01c6f 8073 trace_nfs4_sequence(clp, task->tk_status);
fc01cea9
AA		 8074 if (task->tk_status < 0) {
8075 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 8076 if (atomic_read(&clp->cl_count) == 1)
8077 goto out;
fc01cea9 8078
aa5190d0
TM		 8079 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
8080 rpc_restart_call_prepare(task);
fc01cea9
AA		 8081 return;
8082 }
8083 }
fc01cea9 8084 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 8085out:
fc01cea9
AA		 8086 dprintk("<-- %s\n", __func__);
8087}
8088
8089static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
8090{
d5f8d3fe
TM		 8091 struct nfs4_sequence_data *calldata = data;
8092 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 8093 struct nfs4_sequence_args *args;
8094 struct nfs4_sequence_res *res;
8095
fc01cea9
AA		 8096 args = task->tk_msg.rpc_argp;
8097 res = task->tk_msg.rpc_resp;
8098
7981c8a6 8099 nfs4_setup_sequence(clp, args, res, task);
fc01cea9
AA		 8100}
8101
8102static const struct rpc_call_ops nfs41_sequence_ops = {
8103 .rpc_call_done = nfs41_sequence_call_done,
8104 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 8105 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 8106};
8107
8fe72bac
TM		 8108static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
8109 struct rpc_cred *cred,
8110 bool is_privileged)
fc01cea9 8111{
d5f8d3fe 8112 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 8113 struct rpc_message msg = {
8114 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
8115 .rpc_cred = cred,
8116 };
71ac6da9
TM		 8117 struct rpc_task_setup task_setup_data = {
8118 .rpc_client = clp->cl_rpcclient,
8119 .rpc_message = &msg,
8fe72bac 8120 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 8121 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 8122 };
fc01cea9 8123
7135840f 8124 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 8125 return ERR_PTR(-EIO);
dfb4f309 8126 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 8127 if (calldata == NULL) {
7135840f 8128 nfs_put_client(clp);
71ac6da9 8129 return ERR_PTR(-ENOMEM);
fc01cea9 8130 }
a9c92d6b 8131 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 8132 if (is_privileged)
8133 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 8134 msg.rpc_argp = &calldata->args;
8135 msg.rpc_resp = &calldata->res;
8136 calldata->clp = clp;
71ac6da9 8137 task_setup_data.callback_data = calldata;
fc01cea9 8138
71ac6da9
TM		 8139 return rpc_run_task(&task_setup_data);
8140}
8141
2f60ea6b 8142static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 8143{
8144 struct rpc_task *task;
8145 int ret = 0;
8146
2f60ea6b 8147 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
d1f456b0 8148 return -EAGAIN;
8fe72bac 8149 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 8150 if (IS_ERR(task))
8151 ret = PTR_ERR(task);
8152 else
bf294b41 8153 rpc_put_task_async(task);
71ac6da9
TM		 8154 dprintk("<-- %s status=%d\n", __func__, ret);
8155 return ret;
8156}
8157
8158static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
8159{
8160 struct rpc_task *task;
8161 int ret;
8162
8fe72bac 8163 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 8164 if (IS_ERR(task)) {
8165 ret = PTR_ERR(task);
8166 goto out;
8167 }
8168 ret = rpc_wait_for_completion_task(task);
be824167 8169 if (!ret)
71ac6da9
TM		 8170 ret = task->tk_status;
8171 rpc_put_task(task);
8172out:
8173 dprintk("<-- %s status=%d\n", __func__, ret);
8174 return ret;
fc01cea9
AA		 8175}
8176
fce5c838
RL		 8177struct nfs4_reclaim_complete_data {
8178 struct nfs_client *clp;
8179 struct nfs41_reclaim_complete_args arg;
8180 struct nfs41_reclaim_complete_res res;
8181};
8182
8183static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
8184{
8185 struct nfs4_reclaim_complete_data *calldata = data;
8186
7981c8a6 8187 nfs4_setup_sequence(calldata->clp,
d9afbd1b
TM		 8188 &calldata->arg.seq_args,
8189 &calldata->res.seq_res,
8190 task);
fce5c838
RL		 8191}
8192
aa5190d0
TM		 8193static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
8194{
8195 switch(task->tk_status) {
8196 case 0:
8197 case -NFS4ERR_COMPLETE_ALREADY:
8198 case -NFS4ERR_WRONG_CRED: /* What to do here? */
8199 break;
8200 case -NFS4ERR_DELAY:
aa5190d0 8201 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 8202 /* fall through */
8203 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 8204 return -EAGAIN;
8205 default:
0400a6b0 8206 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 8207 }
8208 return 0;
8209}
8210
fce5c838
RL		 8211static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
8212{
8213 struct nfs4_reclaim_complete_data *calldata = data;
8214 struct nfs_client *clp = calldata->clp;
8215 struct nfs4_sequence_res *res = &calldata->res.seq_res;
8216
8217 dprintk("--> %s\n", __func__);
14516c3a
TM		 8218 if (!nfs41_sequence_done(task, res))
8219 return;
fce5c838 8220
c6d01c6f 8221 trace_nfs4_reclaim_complete(clp, task->tk_status);
aa5190d0
TM		 8222 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
8223 rpc_restart_call_prepare(task);
8224 return;
8225 }
fce5c838
RL		 8226 dprintk("<-- %s\n", __func__);
8227}
8228
8229static void nfs4_free_reclaim_complete_data(void *data)
8230{
8231 struct nfs4_reclaim_complete_data *calldata = data;
8232
8233 kfree(calldata);
8234}
8235
8236static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
8237 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
8238 .rpc_call_done = nfs4_reclaim_complete_done,
8239 .rpc_release = nfs4_free_reclaim_complete_data,
8240};
8241
8242/*
8243 * Issue a global reclaim complete.
8244 */
965e9c23
TM		 8245static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
8246 struct rpc_cred *cred)
fce5c838
RL		 8247{
8248 struct nfs4_reclaim_complete_data *calldata;
8249 struct rpc_task *task;
8250 struct rpc_message msg = {
8251 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 8252 .rpc_cred = cred,
fce5c838
RL		 8253 };
8254 struct rpc_task_setup task_setup_data = {
8255 .rpc_client = clp->cl_rpcclient,
8256 .rpc_message = &msg,
8257 .callback_ops = &nfs4_reclaim_complete_call_ops,
8258 .flags = RPC_TASK_ASYNC,
8259 };
8260 int status = -ENOMEM;
8261
8262 dprintk("--> %s\n", __func__);
8535b2be 8263 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 8264 if (calldata == NULL)
8265 goto out;
8266 calldata->clp = clp;
8267 calldata->arg.one_fs = 0;
fce5c838 8268
a9c92d6b 8269 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 8270 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 8271 msg.rpc_argp = &calldata->arg;
8272 msg.rpc_resp = &calldata->res;
8273 task_setup_data.callback_data = calldata;
8274 task = rpc_run_task(&task_setup_data);
acf82b85 8275 if (IS_ERR(task)) {
fce5c838 8276 status = PTR_ERR(task);
acf82b85
DC		 8277 goto out;
8278 }
820bf85c 8279 status = rpc_wait_for_completion_task(task);
c34c32ea
AA		 8280 if (status == 0)
8281 status = task->tk_status;
fce5c838 8282 rpc_put_task(task);
acf82b85 8283 return 0;
fce5c838
RL		 8284out:
8285 dprintk("<-- %s status=%d\n", __func__, status);
8286 return status;
8287}
b1f69b75
AA		 8288
8289static void
8290nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
8291{
8292 struct nfs4_layoutget *lgp = calldata;
c31663d4 8293 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
b1f69b75
AA		 8294
8295 dprintk("--> %s\n", __func__);
7981c8a6 8296 nfs4_setup_sequence(server->nfs_client, &lgp->args.seq_args,
183d9e7b
JL		 8297 &lgp->res.seq_res, task);
8298 dprintk("<-- %s\n", __func__);
b1f69b75
AA		 8299}
8300
8301static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
8302{
8303 struct nfs4_layoutget *lgp = calldata;
183d9e7b
JL		 8304
8305 dprintk("--> %s\n", __func__);
2e80dbe7 8306 nfs41_sequence_process(task, &lgp->res.seq_res);
183d9e7b
JL		 8307 dprintk("<-- %s\n", __func__);
8308}
8309
8310static int
8311nfs4_layoutget_handle_exception(struct rpc_task *task,
8312 struct nfs4_layoutget *lgp, struct nfs4_exception *exception)
8313{
ee314c2a
TM		 8314 struct inode *inode = lgp->args.inode;
8315 struct nfs_server *server = NFS_SERVER(inode);
8316 struct pnfs_layout_hdr *lo;
e85d7ee4
TM		 8317 int nfs4err = task->tk_status;
8318 int err, status = 0;
f7db0b28 8319 LIST_HEAD(head);
b1f69b75 8320
ed7e5423 8321 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
b1f69b75 8322
e85d7ee4 8323 switch (nfs4err) {
b1f69b75 8324 case 0:
ee314c2a 8325 goto out;
7c1e6e58
PT		 8326
8327 /*
8328 * NFS4ERR_LAYOUTUNAVAILABLE means we are not supposed to use pnfs
8329 * on the file. set tk_status to -ENODATA to tell upper layer to
8330 * retry go inband.
8331 */
8332 case -NFS4ERR_LAYOUTUNAVAILABLE:
183d9e7b 8333 status = -ENODATA;
7c1e6e58 8334 goto out;
21b874c8
TM		 8335 /*
8336 * NFS4ERR_BADLAYOUT means the MDS cannot return a layout of
8337 * length lgp->args.minlength != 0 (see RFC5661 section 18.43.3).
8338 */
8339 case -NFS4ERR_BADLAYOUT:
183d9e7b
JL		 8340 status = -EOVERFLOW;
8341 goto out;
ed7e5423
BH		 8342 /*
8343 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
21b874c8
TM		 8344 * (or clients) writing to the same RAID stripe except when
8345 * the minlength argument is 0 (see RFC5661 section 18.43.3).
183d9e7b
JL		 8346 *
8347 * Treat it like we would RECALLCONFLICT -- we retry for a little
8348 * while, and then eventually give up.
ed7e5423 8349 */
b1f69b75 8350 case -NFS4ERR_LAYOUTTRYLATER:
183d9e7b
JL		 8351 if (lgp->args.minlength == 0) {
8352 status = -EOVERFLOW;
8353 goto out;
ed7e5423 8354 }
e85d7ee4
TM		 8355 status = -EBUSY;
8356 break;
183d9e7b 8357 case -NFS4ERR_RECALLCONFLICT:
183d9e7b 8358 status = -ERECALLCONFLICT;
e85d7ee4 8359 break;
26f47443
TM		 8360 case -NFS4ERR_DELEG_REVOKED:
8361 case -NFS4ERR_ADMIN_REVOKED:
ee314c2a
TM		 8362 case -NFS4ERR_EXPIRED:
8363 case -NFS4ERR_BAD_STATEID:
183d9e7b 8364 exception->timeout = 0;
ee314c2a 8365 spin_lock(&inode->i_lock);
f7db0b28
TM		 8366 lo = NFS_I(inode)->layout;
8367 /* If the open stateid was bad, then recover it. */
8368 if (!lo || test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) ||
8369 nfs4_stateid_match_other(&lgp->args.stateid,
2259f960 8370 &lgp->args.ctx->state->stateid)) {
ee314c2a 8371 spin_unlock(&inode->i_lock);
183d9e7b 8372 exception->state = lgp->args.ctx->state;
26f47443 8373 exception->stateid = &lgp->args.stateid;
2259f960
TM		 8374 break;
8375 }
f7db0b28
TM		 8376
8377 /*
8378 * Mark the bad layout state as invalid, then retry
8379 */
668f455d 8380 pnfs_mark_layout_stateid_invalid(lo, &head);
f7db0b28
TM		 8381 spin_unlock(&inode->i_lock);
8382 pnfs_free_lseg_list(&head);
8383 status = -EAGAIN;
8384 goto out;
b1f69b75 8385 }
183d9e7b 8386
8ac09251 8387 nfs4_sequence_free_slot(&lgp->res.seq_res);
e85d7ee4
TM		 8388 err = nfs4_handle_exception(server, nfs4err, exception);
8389 if (!status) {
8390 if (exception->retry)
8391 status = -EAGAIN;
8392 else
8393 status = err;
8394 }
ee314c2a 8395out:
b1f69b75 8396 dprintk("<-- %s\n", __func__);
183d9e7b 8397 return status;
b1f69b75
AA		 8398}
8399
8554116e
IK		 8400static size_t max_response_pages(struct nfs_server *server)
8401{
8402 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
8403 return nfs_page_array_len(0, max_resp_sz);
8404}
8405
8406static void nfs4_free_pages(struct page **pages, size_t size)
8407{
8408 int i;
8409
8410 if (!pages)
8411 return;
8412
8413 for (i = 0; i < size; i++) {
8414 if (!pages[i])
8415 break;
8416 __free_page(pages[i]);
8417 }
8418 kfree(pages);
8419}
8420
8421static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
8422{
8423 struct page **pages;
8424 int i;
8425
8426 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
8427 if (!pages) {
8428 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
8429 return NULL;
8430 }
8431
8432 for (i = 0; i < size; i++) {
8433 pages[i] = alloc_page(gfp_flags);
8434 if (!pages[i]) {
8435 dprintk("%s: failed to allocate page\n", __func__);
8436 nfs4_free_pages(pages, size);
8437 return NULL;
8438 }
8439 }
8440
8441 return pages;
8442}
8443
b1f69b75
AA		 8444static void nfs4_layoutget_release(void *calldata)
8445{
8446 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 8447 struct inode *inode = lgp->args.inode;
8448 struct nfs_server *server = NFS_SERVER(inode);
8554116e 8449 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 8450
8451 dprintk("--> %s\n", __func__);
8554116e 8452 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 8453 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 8454 put_nfs_open_context(lgp->args.ctx);
8455 kfree(calldata);
8456 dprintk("<-- %s\n", __func__);
8457}
8458
8459static const struct rpc_call_ops nfs4_layoutget_call_ops = {
8460 .rpc_call_prepare = nfs4_layoutget_prepare,
8461 .rpc_call_done = nfs4_layoutget_done,
8462 .rpc_release = nfs4_layoutget_release,
8463};
8464
a0b0a6e3 8465struct pnfs_layout_segment *
183d9e7b 8466nfs4_proc_layoutget(struct nfs4_layoutget *lgp, long *timeout, gfp_t gfp_flags)
b1f69b75 8467{
a47970ff
WAA		 8468 struct inode *inode = lgp->args.inode;
8469 struct nfs_server *server = NFS_SERVER(inode);
8554116e 8470 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 8471 struct rpc_task *task;
8472 struct rpc_message msg = {
8473 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
8474 .rpc_argp = &lgp->args,
8475 .rpc_resp = &lgp->res,
6ab59344 8476 .rpc_cred = lgp->cred,
b1f69b75
AA		 8477 };
8478 struct rpc_task_setup task_setup_data = {
8479 .rpc_client = server->client,
8480 .rpc_message = &msg,
8481 .callback_ops = &nfs4_layoutget_call_ops,
8482 .callback_data = lgp,
8483 .flags = RPC_TASK_ASYNC,
8484 };
a0b0a6e3 8485 struct pnfs_layout_segment *lseg = NULL;
bc23676c
TM		 8486 struct nfs4_exception exception = {
8487 .inode = inode,
8488 .timeout = *timeout,
8489 };
b1f69b75
AA		 8490 int status = 0;
8491
8492 dprintk("--> %s\n", __func__);
8493
4bd5a980
PT		 8494 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
8495 pnfs_get_layout_hdr(NFS_I(inode)->layout);
8496
8554116e
IK		 8497 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
8498 if (!lgp->args.layout.pages) {
8499 nfs4_layoutget_release(lgp);
a0b0a6e3 8500 return ERR_PTR(-ENOMEM);
8554116e
IK		 8501 }
8502 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
8503
35124a09 8504 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 8505 lgp->res.seq_res.sr_slot = NULL;
a9c92d6b 8506 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff 8507
b1f69b75
AA		 8508 task = rpc_run_task(&task_setup_data);
8509 if (IS_ERR(task))
a0b0a6e3 8510 return ERR_CAST(task);
820bf85c 8511 status = rpc_wait_for_completion_task(task);
183d9e7b
JL		 8512 if (status == 0) {
8513 status = nfs4_layoutget_handle_exception(task, lgp, &exception);
8514 *timeout = exception.timeout;
8515 }
8516
1037e6ea
TM		 8517 trace_nfs4_layoutget(lgp->args.ctx,
8518 &lgp->args.range,
8519 &lgp->res.range,
48c9579a 8520 &lgp->res.stateid,
1037e6ea 8521 status);
183d9e7b 8522
085b7a45
WAA		 8523 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
8524 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 8525 lseg = pnfs_layout_process(lgp);
2e80dbe7 8526 nfs4_sequence_free_slot(&lgp->res.seq_res);
b1f69b75
AA		 8527 rpc_put_task(task);
8528 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 8529 if (status)
8530 return ERR_PTR(status);
8531 return lseg;
b1f69b75
AA		 8532}
8533
cbe82603
BH		 8534static void
8535nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
8536{
8537 struct nfs4_layoutreturn *lrp = calldata;
8538
8539 dprintk("--> %s\n", __func__);
7981c8a6 8540 nfs4_setup_sequence(lrp->clp,
d9afbd1b
TM		 8541 &lrp->args.seq_args,
8542 &lrp->res.seq_res,
8543 task);
cbe82603
BH		 8544}
8545
8546static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
8547{
8548 struct nfs4_layoutreturn *lrp = calldata;
8549 struct nfs_server *server;
8550
8551 dprintk("--> %s\n", __func__);
8552
2e80dbe7 8553 if (!nfs41_sequence_process(task, &lrp->res.seq_res))
cbe82603
BH		 8554 return;
8555
8556 server = NFS_SERVER(lrp->args.inode);
f22e5edd
TM		 8557 switch (task->tk_status) {
8558 default:
8559 task->tk_status = 0;
8560 case 0:
8561 break;
8562 case -NFS4ERR_DELAY:
8478eaa1 8563 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
f22e5edd 8564 break;
2e80dbe7 8565 nfs4_sequence_free_slot(&lrp->res.seq_res);
d00c5d43 8566 rpc_restart_call_prepare(task);
cbe82603
BH		 8567 return;
8568 }
cbe82603
BH		 8569 dprintk("<-- %s\n", __func__);
8570}
8571
8572static void nfs4_layoutreturn_release(void *calldata)
8573{
8574 struct nfs4_layoutreturn *lrp = calldata;
849b286f 8575 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 8576
8577 dprintk("--> %s\n", __func__);
2a974425 8578 pnfs_layoutreturn_free_lsegs(lo, &lrp->args.stateid, &lrp->args.range,
68f74479 8579 lrp->res.lrs_present ? &lrp->res.stateid : NULL);
2e80dbe7 8580 nfs4_sequence_free_slot(&lrp->res.seq_res);
4d796d75
TM		 8581 if (lrp->ld_private.ops && lrp->ld_private.ops->free)
8582 lrp->ld_private.ops->free(&lrp->ld_private);
2f065ddb
TM		 8583 pnfs_put_layout_hdr(lrp->args.layout);
8584 nfs_iput_and_deactive(lrp->inode);
cbe82603
BH		 8585 kfree(calldata);
8586 dprintk("<-- %s\n", __func__);
8587}
8588
8589static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
8590 .rpc_call_prepare = nfs4_layoutreturn_prepare,
8591 .rpc_call_done = nfs4_layoutreturn_done,
8592 .rpc_release = nfs4_layoutreturn_release,
8593};
8594
6c16605d 8595int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync)
cbe82603
BH		 8596{
8597 struct rpc_task *task;
8598 struct rpc_message msg = {
8599 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
8600 .rpc_argp = &lrp->args,
8601 .rpc_resp = &lrp->res,
9556000d 8602 .rpc_cred = lrp->cred,
cbe82603
BH		 8603 };
8604 struct rpc_task_setup task_setup_data = {
1771c577 8605 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
cbe82603
BH		 8606 .rpc_message = &msg,
8607 .callback_ops = &nfs4_layoutreturn_call_ops,
8608 .callback_data = lrp,
8609 };
6c16605d 8610 int status = 0;
cbe82603 8611
99ade3c7
AE		 8612 nfs4_state_protect(NFS_SERVER(lrp->args.inode)->nfs_client,
8613 NFS_SP4_MACH_CRED_PNFS_CLEANUP,
8614 &task_setup_data.rpc_client, &msg);
8615
cbe82603 8616 dprintk("--> %s\n", __func__);
5a0ec8ac
TM		 8617 if (!sync) {
8618 lrp->inode = nfs_igrab_and_active(lrp->args.inode);
8619 if (!lrp->inode) {
8620 nfs4_layoutreturn_release(lrp);
8621 return -EAGAIN;
8622 }
8623 task_setup_data.flags |= RPC_TASK_ASYNC;
8624 }
a9c92d6b 8625 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 8626 task = rpc_run_task(&task_setup_data);
8627 if (IS_ERR(task))
8628 return PTR_ERR(task);
5a0ec8ac
TM		 8629 if (sync)
8630 status = task->tk_status;
48c9579a 8631 trace_nfs4_layoutreturn(lrp->args.inode, &lrp->args.stateid, status);
cbe82603
BH		 8632 dprintk("<-- %s status=%d\n", __func__, status);
8633 rpc_put_task(task);
8634 return status;
8635}
8636
b1f69b75 8637static int
cd5875fe
TM		 8638_nfs4_proc_getdeviceinfo(struct nfs_server *server,
8639 struct pnfs_device *pdev,
8640 struct rpc_cred *cred)
b1f69b75
AA		 8641{
8642 struct nfs4_getdeviceinfo_args args = {
8643 .pdev = pdev,
4e590803
TM		 8644 .notify_types = NOTIFY_DEVICEID4_CHANGE |
8645 NOTIFY_DEVICEID4_DELETE,
b1f69b75
AA		 8646 };
8647 struct nfs4_getdeviceinfo_res res = {
8648 .pdev = pdev,
8649 };
8650 struct rpc_message msg = {
8651 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
8652 .rpc_argp = &args,
8653 .rpc_resp = &res,
cd5875fe 8654 .rpc_cred = cred,
b1f69b75
AA		 8655 };
8656 int status;
8657
8658 dprintk("--> %s\n", __func__);
7c513058 8659 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4e590803
TM		 8660 if (res.notification & ~args.notify_types)
8661 dprintk("%s: unsupported notification\n", __func__);
df52699e
TM		 8662 if (res.notification != args.notify_types)
8663 pdev->nocache = 1;
4e590803 8664
b1f69b75
AA		 8665 dprintk("<-- %s status=%d\n", __func__, status);
8666
8667 return status;
8668}
8669
cd5875fe
TM		 8670int nfs4_proc_getdeviceinfo(struct nfs_server *server,
8671 struct pnfs_device *pdev,
8672 struct rpc_cred *cred)
b1f69b75
AA		 8673{
8674 struct nfs4_exception exception = { };
8675 int err;
8676
8677 do {
8678 err = nfs4_handle_exception(server,
cd5875fe 8679 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 8680 &exception);
8681 } while (exception.retry);
8682 return err;
8683}
8684EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
8685
863a3c6c
AA		 8686static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
8687{
8688 struct nfs4_layoutcommit_data *data = calldata;
8689 struct nfs_server *server = NFS_SERVER(data->args.inode);
8690
7981c8a6 8691 nfs4_setup_sequence(server->nfs_client,
d9afbd1b
TM		 8692 &data->args.seq_args,
8693 &data->res.seq_res,
8694 task);
863a3c6c
AA		 8695}
8696
8697static void
8698nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
8699{
8700 struct nfs4_layoutcommit_data *data = calldata;
8701 struct nfs_server *server = NFS_SERVER(data->args.inode);
8702
6ba7db34 8703 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 8704 return;
8705
8706 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 8707 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
8708 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
8709 case -NFS4ERR_BADLAYOUT: /* no layout */
8710 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 8711 task->tk_status = 0;
e59d27e0 8712 case 0:
e59d27e0
TM		 8713 break;
8714 default:
8478eaa1 8715 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) {
e59d27e0
TM		 8716 rpc_restart_call_prepare(task);
8717 return;
8718 }
8719 }
863a3c6c
AA		 8720}
8721
8722static void nfs4_layoutcommit_release(void *calldata)
8723{
8724 struct nfs4_layoutcommit_data *data = calldata;
8725
db29c089 8726 pnfs_cleanup_layoutcommit(data);
d8c951c3
TM		 8727 nfs_post_op_update_inode_force_wcc(data->args.inode,
8728 data->res.fattr);
863a3c6c 8729 put_rpccred(data->cred);
472e2594 8730 nfs_iput_and_deactive(data->inode);
863a3c6c
AA		 8731 kfree(data);
8732}
8733
8734static const struct rpc_call_ops nfs4_layoutcommit_ops = {
8735 .rpc_call_prepare = nfs4_layoutcommit_prepare,
8736 .rpc_call_done = nfs4_layoutcommit_done,
8737 .rpc_release = nfs4_layoutcommit_release,
8738};
8739
8740int
ef311537 8741nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 8742{
8743 struct rpc_message msg = {
8744 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
8745 .rpc_argp = &data->args,
8746 .rpc_resp = &data->res,
8747 .rpc_cred = data->cred,
8748 };
8749 struct rpc_task_setup task_setup_data = {
8750 .task = &data->task,
8751 .rpc_client = NFS_CLIENT(data->args.inode),
8752 .rpc_message = &msg,
8753 .callback_ops = &nfs4_layoutcommit_ops,
8754 .callback_data = data,
863a3c6c
AA		 8755 };
8756 struct rpc_task *task;
8757 int status = 0;
8758
b4839ebe
KM		 8759 dprintk("NFS: initiating layoutcommit call. sync %d "
8760 "lbw: %llu inode %lu\n", sync,
863a3c6c
AA		 8761 data->args.lastbytewritten,
8762 data->args.inode->i_ino);
8763
472e2594
TM		 8764 if (!sync) {
8765 data->inode = nfs_igrab_and_active(data->args.inode);
8766 if (data->inode == NULL) {
8767 nfs4_layoutcommit_release(data);
8768 return -EAGAIN;
8769 }
8770 task_setup_data.flags = RPC_TASK_ASYNC;
8771 }
a9c92d6b 8772 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 8773 task = rpc_run_task(&task_setup_data);
8774 if (IS_ERR(task))
8775 return PTR_ERR(task);
472e2594
TM		 8776 if (sync)
8777 status = task->tk_status;
48c9579a 8778 trace_nfs4_layoutcommit(data->args.inode, &data->args.stateid, status);
863a3c6c
AA		 8779 dprintk("%s: status %d\n", __func__, status);
8780 rpc_put_task(task);
8781 return status;
8782}
fca78d6d 8783
97431204
AA		 8784/**
8785 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
8786 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
8787 */
fca78d6d
BS		 8788static int
8789_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
b1b3e136
WAA		 8790 struct nfs_fsinfo *info,
8791 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
fca78d6d
BS		 8792{
8793 struct nfs41_secinfo_no_name_args args = {
8794 .style = SECINFO_STYLE_CURRENT_FH,
8795 };
8796 struct nfs4_secinfo_res res = {
8797 .flavors = flavors,
8798 };
8799 struct rpc_message msg = {
8800 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
8801 .rpc_argp = &args,
8802 .rpc_resp = &res,
8803 };
b1b3e136 8804 struct rpc_clnt *clnt = server->client;
7cb852df 8805 struct rpc_cred *cred = NULL;
b1b3e136
WAA		 8806 int status;
8807
8808 if (use_integrity) {
8809 clnt = server->nfs_client->cl_rpcclient;
7cb852df
WAA		 8810 cred = nfs4_get_clid_cred(server->nfs_client);
8811 msg.rpc_cred = cred;
b1b3e136
WAA		 8812 }
8813
8814 dprintk("--> %s\n", __func__);
8815 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
8816 &res.seq_res, 0);
8817 dprintk("<-- %s status=%d\n", __func__, status);
8818
7cb852df
WAA		 8819 if (cred)
8820 put_rpccred(cred);
b1b3e136
WAA		 8821
8822 return status;
fca78d6d
BS		 8823}
8824
8825static int
8826nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8827 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
8828{
8829 struct nfs4_exception exception = { };
8830 int err;
8831 do {
b1b3e136
WAA		 8832 /* first try using integrity protection */
8833 err = -NFS4ERR_WRONGSEC;
8834
8835 /* try to use integrity protection with machine cred */
8836 if (_nfs4_is_integrity_protected(server->nfs_client))
8837 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8838 flavors, true);
8839
8840 /*
8841 * if unable to use integrity protection, or SECINFO with
8842 * integrity protection returns NFS4ERR_WRONGSEC (which is
8843 * disallowed by spec, but exists in deployed servers) use
8844 * the current filesystem's rpc_client and the user cred.
8845 */
8846 if (err == -NFS4ERR_WRONGSEC)
8847 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8848 flavors, false);
8849
fca78d6d
BS		 8850 switch (err) {
8851 case 0:
8852 case -NFS4ERR_WRONGSEC:
78b19bae 8853 case -ENOTSUPP:
05e9cfb4 8854 goto out;
fca78d6d
BS		 8855 default:
8856 err = nfs4_handle_exception(server, err, &exception);
8857 }
8858 } while (exception.retry);
05e9cfb4 8859out:
fca78d6d
BS		 8860 return err;
8861}
8862
8863static int
8864nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
8865 struct nfs_fsinfo *info)
8866{
8867 int err;
8868 struct page *page;
367156d9 8869 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
fca78d6d 8870 struct nfs4_secinfo_flavors *flavors;
58a8cf12
WAA		 8871 struct nfs4_secinfo4 *secinfo;
8872 int i;
fca78d6d
BS		 8873
8874 page = alloc_page(GFP_KERNEL);
8875 if (!page) {
8876 err = -ENOMEM;
8877 goto out;
8878 }
8879
8880 flavors = page_address(page);
8881 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
8882
8883 /*
8884 * Fall back on "guess and check" method if
8885 * the server doesn't support SECINFO_NO_NAME
8886 */
78b19bae 8887 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
fca78d6d
BS		 8888 err = nfs4_find_root_sec(server, fhandle, info);
8889 goto out_freepage;
8890 }
8891 if (err)
8892 goto out_freepage;
8893
58a8cf12
WAA		 8894 for (i = 0; i < flavors->num_flavors; i++) {
8895 secinfo = &flavors->flavors[i];
8896
8897 switch (secinfo->flavor) {
8898 case RPC_AUTH_NULL:
8899 case RPC_AUTH_UNIX:
8900 case RPC_AUTH_GSS:
8901 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
8902 &secinfo->flavor_info);
8903 break;
8904 default:
8905 flavor = RPC_AUTH_MAXFLAVOR;
8906 break;
8907 }
8908
4d4b69dd
WAA		 8909 if (!nfs_auth_info_match(&server->auth_info, flavor))
8910 flavor = RPC_AUTH_MAXFLAVOR;
8911
58a8cf12
WAA		 8912 if (flavor != RPC_AUTH_MAXFLAVOR) {
8913 err = nfs4_lookup_root_sec(server, fhandle,
8914 info, flavor);
8915 if (!err)
8916 break;
8917 }
8918 }
8919
8920 if (flavor == RPC_AUTH_MAXFLAVOR)
8921 err = -EPERM;
fca78d6d
BS		 8922
8923out_freepage:
8924 put_page(page);
8925 if (err == -EACCES)
8926 return -EPERM;
8927out:
8928 return err;
8929}
1cab0652 8930
ab7cb0df
TM		 8931static int _nfs41_test_stateid(struct nfs_server *server,
8932 nfs4_stateid *stateid,
8933 struct rpc_cred *cred)
7d974794
BS		 8934{
8935 int status;
8936 struct nfs41_test_stateid_args args = {
1cab0652 8937 .stateid = stateid,
7d974794
BS		 8938 };
8939 struct nfs41_test_stateid_res res;
8940 struct rpc_message msg = {
8941 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
8942 .rpc_argp = &args,
8943 .rpc_resp = &res,
ab7cb0df 8944 .rpc_cred = cred,
7d974794 8945 };
3787d506
WAA		 8946 struct rpc_clnt *rpc_client = server->client;
8947
8948 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8949 &rpc_client, &msg);
1cab0652 8950
38527b15 8951 dprintk("NFS call test_stateid %p\n", stateid);
a9c92d6b 8952 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 8953 nfs4_set_sequence_privileged(&args.seq_args);
3787d506 8954 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8fe72bac 8955 &args.seq_args, &res.seq_res);
38527b15
CL		 8956 if (status != NFS_OK) {
8957 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 8958 return status;
38527b15
CL		 8959 }
8960 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 8961 return -res.status;
7d974794
BS		 8962}
8963
43912bbb
TM		 8964static void nfs4_handle_delay_or_session_error(struct nfs_server *server,
8965 int err, struct nfs4_exception *exception)
8966{
8967 exception->retry = 0;
8968 switch(err) {
8969 case -NFS4ERR_DELAY:
76e8a1bd 8970 case -NFS4ERR_RETRY_UNCACHED_REP:
43912bbb
TM		 8971 nfs4_handle_exception(server, err, exception);
8972 break;
8973 case -NFS4ERR_BADSESSION:
8974 case -NFS4ERR_BADSLOT:
8975 case -NFS4ERR_BAD_HIGH_SLOT:
8976 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
8977 case -NFS4ERR_DEADSESSION:
8978 nfs4_do_handle_exception(server, err, exception);
8979 }
8980}
8981
38527b15
CL		 8982/**
8983 * nfs41_test_stateid - perform a TEST_STATEID operation
8984 *
8985 * @server: server / transport on which to perform the operation
8986 * @stateid: state ID to test
ab7cb0df 8987 * @cred: credential
38527b15
CL		 8988 *
8989 * Returns NFS_OK if the server recognizes that "stateid" is valid.
8990 * Otherwise a negative NFS4ERR value is returned if the operation
8991 * failed or the state ID is not currently valid.
8992 */
ab7cb0df
TM		 8993static int nfs41_test_stateid(struct nfs_server *server,
8994 nfs4_stateid *stateid,
8995 struct rpc_cred *cred)
7d974794
BS		 8996{
8997 struct nfs4_exception exception = { };
8998 int err;
8999 do {
ab7cb0df 9000 err = _nfs41_test_stateid(server, stateid, cred);
43912bbb 9001 nfs4_handle_delay_or_session_error(server, err, &exception);
7d974794
BS		 9002 } while (exception.retry);
9003 return err;
9004}
9aeda35f 9005
7c1d5fae
TM		 9006struct nfs_free_stateid_data {
9007 struct nfs_server *server;
9008 struct nfs41_free_stateid_args args;
9aeda35f 9009 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 9010};
9011
9012static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
9013{
9014 struct nfs_free_stateid_data *data = calldata;
7981c8a6 9015 nfs4_setup_sequence(data->server->nfs_client,
7c1d5fae
TM		 9016 &data->args.seq_args,
9017 &data->res.seq_res,
9018 task);
9019}
9020
9021static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
9022{
9023 struct nfs_free_stateid_data *data = calldata;
9024
9025 nfs41_sequence_done(task, &data->res.seq_res);
9026
9027 switch (task->tk_status) {
9028 case -NFS4ERR_DELAY:
8478eaa1 9029 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN)
7c1d5fae
TM		 9030 rpc_restart_call_prepare(task);
9031 }
9032}
9033
9034static void nfs41_free_stateid_release(void *calldata)
9035{
9036 kfree(calldata);
9037}
9038
17f26b12 9039static const struct rpc_call_ops nfs41_free_stateid_ops = {
7c1d5fae
TM		 9040 .rpc_call_prepare = nfs41_free_stateid_prepare,
9041 .rpc_call_done = nfs41_free_stateid_done,
9042 .rpc_release = nfs41_free_stateid_release,
9043};
9044
9045static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
f0b0bf88 9046 const nfs4_stateid *stateid,
ab7cb0df 9047 struct rpc_cred *cred,
7c1d5fae
TM		 9048 bool privileged)
9049{
9aeda35f
BS		 9050 struct rpc_message msg = {
9051 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 9052 .rpc_cred = cred,
9aeda35f 9053 };
7c1d5fae
TM		 9054 struct rpc_task_setup task_setup = {
9055 .rpc_client = server->client,
9056 .rpc_message = &msg,
9057 .callback_ops = &nfs41_free_stateid_ops,
9058 .flags = RPC_TASK_ASYNC,
9059 };
9060 struct nfs_free_stateid_data *data;
9aeda35f 9061
3787d506
WAA		 9062 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
9063 &task_setup.rpc_client, &msg);
9064
38527b15 9065 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 9066 data = kmalloc(sizeof(*data), GFP_NOFS);
9067 if (!data)
9068 return ERR_PTR(-ENOMEM);
9069 data->server = server;
9070 nfs4_stateid_copy(&data->args.stateid, stateid);
9071
9072 task_setup.callback_data = data;
9073
9074 msg.rpc_argp = &data->args;
9075 msg.rpc_resp = &data->res;
76e8a1bd 9076 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
7c1d5fae
TM		 9077 if (privileged)
9078 nfs4_set_sequence_privileged(&data->args.seq_args);
9079
9080 return rpc_run_task(&task_setup);
9aeda35f
BS		 9081}
9082
38527b15
CL		 9083/**
9084 * nfs41_free_stateid - perform a FREE_STATEID operation
9085 *
9086 * @server: server / transport on which to perform the operation
9087 * @stateid: state ID to release
ab7cb0df 9088 * @cred: credential
f0b0bf88 9089 * @is_recovery: set to true if this call needs to be privileged
38527b15 9090 *
f0b0bf88 9091 * Note: this function is always asynchronous.
38527b15 9092 */
ab7cb0df 9093static int nfs41_free_stateid(struct nfs_server *server,
f0b0bf88
TM		 9094 const nfs4_stateid *stateid,
9095 struct rpc_cred *cred,
9096 bool is_recovery)
9aeda35f 9097{
7c1d5fae 9098 struct rpc_task *task;
7c1d5fae 9099
f0b0bf88 9100 task = _nfs41_free_stateid(server, stateid, cred, is_recovery);
7c1d5fae
TM		 9101 if (IS_ERR(task))
9102 return PTR_ERR(task);
7c1d5fae 9103 rpc_put_task(task);
f0b0bf88 9104 return 0;
9aeda35f 9105}
36281caa 9106
f1cdae87
JL		 9107static void
9108nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
c8b2d0bf 9109{
ab7cb0df 9110 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 9111
f0b0bf88 9112 nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf 9113 nfs4_free_lock_state(server, lsp);
c8b2d0bf
TM		 9114}
9115
36281caa
TM		 9116static bool nfs41_match_stateid(const nfs4_stateid *s1,
9117 const nfs4_stateid *s2)
9118{
93b717fd
TM		 9119 if (s1->type != s2->type)
9120 return false;
9121
2d2f24ad 9122 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 9123 return false;
9124
2d2f24ad 9125 if (s1->seqid == s2->seqid)
36281caa 9126 return true;
2d2f24ad 9127 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 9128 return true;
9129
9130 return false;
9131}
9132
557134a3
AA		 9133#endif /* CONFIG_NFS_V4_1 */
9134
36281caa
TM		 9135static bool nfs4_match_stateid(const nfs4_stateid *s1,
9136 const nfs4_stateid *s2)
9137{
f597c537 9138 return nfs4_stateid_match(s1, s2);
36281caa
TM		 9139}
9140
9141
17280175 9142static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 9143 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 9144 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 9145 .recover_open = nfs4_open_reclaim,
9146 .recover_lock = nfs4_lock_reclaim,
591d71cb 9147 .establish_clid = nfs4_init_clientid,
05f4c350 9148 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 9149};
9150
591d71cb 9151#if defined(CONFIG_NFS_V4_1)
17280175 9152static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 9153 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
9154 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
9155 .recover_open = nfs4_open_reclaim,
9156 .recover_lock = nfs4_lock_reclaim,
4d643d1d 9157 .establish_clid = nfs41_init_clientid,
fce5c838 9158 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 9159 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 9160};
9161#endif /* CONFIG_NFS_V4_1 */
9162
17280175 9163static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 9164 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
9165 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
4dfd4f7a 9166 .recover_open = nfs40_open_expired,
591d71cb
AA		 9167 .recover_lock = nfs4_lock_expired,
9168 .establish_clid = nfs4_init_clientid,
9169};
9170
9171#if defined(CONFIG_NFS_V4_1)
17280175 9172static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 9173 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 9174 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 9175 .recover_open = nfs41_open_expired,
9176 .recover_lock = nfs41_lock_expired,
4d643d1d 9177 .establish_clid = nfs41_init_clientid,
1da177e4 9178};
591d71cb 9179#endif /* CONFIG_NFS_V4_1 */
1da177e4 9180
17280175 9181static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 9182 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 9183 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 9184 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 9185};
9186
9187#if defined(CONFIG_NFS_V4_1)
17280175 9188static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 9189 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 9190 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 9191 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 9192};
9193#endif
9194
ec011fe8 9195static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
b03d735b 9196 .get_locations = _nfs40_proc_get_locations,
44c99933 9197 .fsid_present = _nfs40_proc_fsid_present,
ec011fe8
CL		 9198};
9199
9200#if defined(CONFIG_NFS_V4_1)
9201static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
b03d735b 9202 .get_locations = _nfs41_proc_get_locations,
44c99933 9203 .fsid_present = _nfs41_proc_fsid_present,
ec011fe8
CL		 9204};
9205#endif /* CONFIG_NFS_V4_1 */
9206
97dc1359
TM		 9207static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
9208 .minor_version = 0,
39c6daae
TM		 9209 .init_caps = NFS_CAP_READDIRPLUS
9210 | NFS_CAP_ATOMIC_OPEN
39c6daae 9211 | NFS_CAP_POSIX_LOCK,
abf79bb3
CL		 9212 .init_client = nfs40_init_client,
9213 .shutdown_client = nfs40_shutdown_client,
36281caa 9214 .match_stateid = nfs4_match_stateid,
fca78d6d 9215 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 9216 .free_lock_state = nfs4_release_lockowner,
45870d69 9217 .test_and_free_expired = nfs40_test_and_free_expired_stateid,
63f5f796 9218 .alloc_seqid = nfs_alloc_seqid,
9915ea7e 9219 .call_sync_ops = &nfs40_call_sync_ops,
c48f4f35
TM		 9220 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
9221 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
9222 .state_renewal_ops = &nfs40_state_renewal_ops,
ec011fe8 9223 .mig_recovery_ops = &nfs40_mig_recovery_ops,
97dc1359
TM		 9224};
9225
9226#if defined(CONFIG_NFS_V4_1)
63f5f796
TM		 9227static struct nfs_seqid *
9228nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2)
9229{
9230 return NULL;
9231}
9232
97dc1359
TM		 9233static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
9234 .minor_version = 1,
39c6daae
TM		 9235 .init_caps = NFS_CAP_READDIRPLUS
9236 | NFS_CAP_ATOMIC_OPEN
3b66486c 9237 | NFS_CAP_POSIX_LOCK
49f9a0fa 9238 | NFS_CAP_STATEID_NFSV41
e983120e 9239 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 9240 .init_client = nfs41_init_client,
9241 .shutdown_client = nfs41_shutdown_client,
36281caa 9242 .match_stateid = nfs41_match_stateid,
fca78d6d 9243 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 9244 .free_lock_state = nfs41_free_lock_state,
45870d69 9245 .test_and_free_expired = nfs41_test_and_free_expired_stateid,
63f5f796 9246 .alloc_seqid = nfs_alloc_no_seqid,
04fa2c6b 9247 .session_trunk = nfs4_test_session_trunk,
9915ea7e 9248 .call_sync_ops = &nfs41_call_sync_ops,
c48f4f35
TM		 9249 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
9250 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
9251 .state_renewal_ops = &nfs41_state_renewal_ops,
ec011fe8 9252 .mig_recovery_ops = &nfs41_mig_recovery_ops,
97dc1359
TM		 9253};
9254#endif
9255
42c2c424
SD		 9256#if defined(CONFIG_NFS_V4_2)
9257static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
9258 .minor_version = 2,
7017310a
BS		 9259 .init_caps = NFS_CAP_READDIRPLUS
9260 | NFS_CAP_ATOMIC_OPEN
7017310a
BS		 9261 | NFS_CAP_POSIX_LOCK
9262 | NFS_CAP_STATEID_NFSV41
e983120e 9263 | NFS_CAP_ATOMIC_OPEN_V1
f4ac1674 9264 | NFS_CAP_ALLOCATE
2e72448b 9265 | NFS_CAP_COPY
624bd5b7 9266 | NFS_CAP_DEALLOCATE
6c5a0d89 9267 | NFS_CAP_SEEK
e5341f3a
PT		 9268 | NFS_CAP_LAYOUTSTATS
9269 | NFS_CAP_CLONE,
abf79bb3
CL		 9270 .init_client = nfs41_init_client,
9271 .shutdown_client = nfs41_shutdown_client,
42c2c424
SD		 9272 .match_stateid = nfs41_match_stateid,
9273 .find_root_sec = nfs41_find_root_sec,
7017310a 9274 .free_lock_state = nfs41_free_lock_state,
9915ea7e 9275 .call_sync_ops = &nfs41_call_sync_ops,
45870d69 9276 .test_and_free_expired = nfs41_test_and_free_expired_stateid,
63f5f796 9277 .alloc_seqid = nfs_alloc_no_seqid,
04fa2c6b 9278 .session_trunk = nfs4_test_session_trunk,
42c2c424
SD		 9279 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
9280 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
9281 .state_renewal_ops = &nfs41_state_renewal_ops,
18e3b739 9282 .mig_recovery_ops = &nfs41_mig_recovery_ops,
42c2c424
SD		 9283};
9284#endif
9285
97dc1359
TM		 9286const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
9287 [0] = &nfs_v4_0_minor_ops,
9288#if defined(CONFIG_NFS_V4_1)
9289 [1] = &nfs_v4_1_minor_ops,
9290#endif
42c2c424
SD		 9291#if defined(CONFIG_NFS_V4_2)
9292 [2] = &nfs_v4_2_minor_ops,
9293#endif
97dc1359
TM		 9294};
9295
13997823 9296static ssize_t nfs4_listxattr(struct dentry *dentry, char *list, size_t size)
c4803c49
AG		 9297{
9298 ssize_t error, error2;
9299
9300 error = generic_listxattr(dentry, list, size);
9301 if (error < 0)
9302 return error;
9303 if (list) {
9304 list += error;
9305 size -= error;
9306 }
9307
9308 error2 = nfs4_listxattr_nfs4_label(d_inode(dentry), list, size);
9309 if (error2 < 0)
9310 return error2;
9311 return error + error2;
9312}
9313
17f26b12 9314static const struct inode_operations nfs4_dir_inode_operations = {
73a79706
BS		 9315 .create = nfs_create,
9316 .lookup = nfs_lookup,
9317 .atomic_open = nfs_atomic_open,
9318 .link = nfs_link,
9319 .unlink = nfs_unlink,
9320 .symlink = nfs_symlink,
9321 .mkdir = nfs_mkdir,
9322 .rmdir = nfs_rmdir,
9323 .mknod = nfs_mknod,
9324 .rename = nfs_rename,
9325 .permission = nfs_permission,
9326 .getattr = nfs_getattr,
9327 .setattr = nfs_setattr,
c4803c49 9328 .listxattr = nfs4_listxattr,
73a79706
BS		 9329};
9330
92e1d5be 9331static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 9332 .permission = nfs_permission,
9333 .getattr = nfs_getattr,
9334 .setattr = nfs_setattr,
c4803c49 9335 .listxattr = nfs4_listxattr,
6b3b5496
BF		 9336};
9337
509de811 9338const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 9339 .version = 4, /* protocol version */
9340 .dentry_ops = &nfs4_dentry_operations,
9341 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 9342 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 9343 .file_ops = &nfs4_file_operations,
1da177e4 9344 .getroot = nfs4_proc_get_root,
281cad46 9345 .submount = nfs4_submount,
ff9099f2 9346 .try_mount = nfs4_try_mount,
1da177e4
LT		 9347 .getattr = nfs4_proc_getattr,
9348 .setattr = nfs4_proc_setattr,
9349 .lookup = nfs4_proc_lookup,
9350 .access = nfs4_proc_access,
9351 .readlink = nfs4_proc_readlink,
1da177e4
LT		 9352 .create = nfs4_proc_create,
9353 .remove = nfs4_proc_remove,
9354 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 9355 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4 9356 .unlink_done = nfs4_proc_unlink_done,
d3d4152a 9357 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 9358 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 9359 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 9360 .link = nfs4_proc_link,
9361 .symlink = nfs4_proc_symlink,
9362 .mkdir = nfs4_proc_mkdir,
9363 .rmdir = nfs4_proc_remove,
9364 .readdir = nfs4_proc_readdir,
9365 .mknod = nfs4_proc_mknod,
9366 .statfs = nfs4_proc_statfs,
9367 .fsinfo = nfs4_proc_fsinfo,
9368 .pathconf = nfs4_proc_pathconf,
e9326dca 9369 .set_capabilities = nfs4_server_capabilities,
1da177e4 9370 .decode_dirent = nfs4_decode_dirent,
a4cdda59 9371 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
1da177e4 9372 .read_setup = nfs4_proc_read_setup,
ec06c096 9373 .read_done = nfs4_read_done,
1da177e4 9374 .write_setup = nfs4_proc_write_setup,
788e7a89 9375 .write_done = nfs4_write_done,
1da177e4 9376 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 9377 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 9378 .commit_done = nfs4_commit_done,
1da177e4 9379 .lock = nfs4_proc_lock,
e50a1c2e 9380 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 9381 .close_context = nfs4_close_context,
2b484297 9382 .open_context = nfs4_atomic_open,
011e2a7f 9383 .have_delegation = nfs4_have_delegation,
57ec14c5 9384 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 9385 .alloc_client = nfs4_alloc_client,
45a52a02 9386 .init_client = nfs4_init_client,
cdb7eced 9387 .free_client = nfs4_free_client,
1179acc6
BS		 9388 .create_server = nfs4_create_server,
9389 .clone_server = nfs_clone_server,
1da177e4
LT		 9390};
9391
64c2ce8b 9392static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
98e9cb57 9393 .name = XATTR_NAME_NFSV4_ACL,
64c2ce8b
AK		 9394 .list = nfs4_xattr_list_nfs4_acl,
9395 .get = nfs4_xattr_get_nfs4_acl,
9396 .set = nfs4_xattr_set_nfs4_acl,
9397};
9398
9399const struct xattr_handler *nfs4_xattr_handlers[] = {
9400 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 9401#ifdef CONFIG_NFS_V4_SECURITY_LABEL
9402 &nfs4_xattr_nfs4_label_handler,
9403#endif
64c2ce8b
AK		 9404 NULL
9405};
9406
1da177e4
LT		 9407/*
9408 * Local variables:
9409 * c-basic-offset: 8
9410 * End:
9411 */
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