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Merge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
[mirror_ubuntu-artful-kernel.git] / fs / nfs / nfs4proc.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
1da177e4
LT		 39#include <linux/delay.h>
40#include <linux/errno.h>
41#include <linux/string.h>
652f89f6
TM		 42#include <linux/ratelimit.h>
43#include <linux/printk.h>
5a0e3ad6 44#include <linux/slab.h>
1da177e4
LT		 45#include <linux/sunrpc/clnt.h>
46#include <linux/nfs.h>
47#include <linux/nfs4.h>
48#include <linux/nfs_fs.h>
49#include <linux/nfs_page.h>
9b7160c5 50#include <linux/nfs_mount.h>
1da177e4 51#include <linux/namei.h>
02a913a7 52#include <linux/mount.h>
99fe60d0 53#include <linux/module.h>
64c2ce8b 54#include <linux/xattr.h>
c7a360b0 55#include <linux/utsname.h>
d310310c 56#include <linux/freezer.h>
1da177e4 57
4ce79717 58#include "nfs4_fs.h"
1da177e4 59#include "delegation.h"
101070ca 60#include "internal.h"
006ea73e 61#include "iostat.h"
fc931582 62#include "callback.h"
b1f69b75 63#include "pnfs.h"
f092075d 64#include "netns.h"
40c64c26 65#include "nfs4idmap.h"
73e39aaa 66#include "nfs4session.h"
de242c0b 67#include "fscache.h"
1da177e4 68
c6d01c6f
TM		 69#include "nfs4trace.h"
70
1da177e4
LT		 71#define NFSDBG_FACILITY NFSDBG_PROC
72
2066fe89 73#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 74#define NFS4_POLL_RETRY_MAX (15*HZ)
75
a1d1c4f1
TM		 76/* file attributes which can be mapped to nfs attributes */
77#define NFS4_VALID_ATTRS (ATTR_MODE \
78 | ATTR_UID \
79 | ATTR_GID \
80 | ATTR_SIZE \
81 | ATTR_ATIME \
82 | ATTR_MTIME \
83 | ATTR_CTIME \
84 | ATTR_ATIME_SET \
85 | ATTR_MTIME_SET)
86
cdd4e68b 87struct nfs4_opendata;
864472e9 88static int _nfs4_proc_open(struct nfs4_opendata *data);
b257957e 89static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 90static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
81934ddb 91static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
1775fd3e
DQ		 92static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, struct nfs4_label *label);
93static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label);
0ab64e0e
TM		 94static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
95 struct nfs_fattr *fattr, struct iattr *sattr,
29b59f94 96 struct nfs_open_context *ctx, struct nfs4_label *ilabel,
1775fd3e 97 struct nfs4_label *olabel);
f062eb6c 98#ifdef CONFIG_NFS_V4_1
ab7cb0df
TM		 99static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *,
100 struct rpc_cred *);
f0b0bf88
TM		 101static int nfs41_free_stateid(struct nfs_server *, const nfs4_stateid *,
102 struct rpc_cred *, bool);
f062eb6c 103#endif
aa9c2669
DQ		 104
105#ifdef CONFIG_NFS_V4_SECURITY_LABEL
106static inline struct nfs4_label *
107nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
108 struct iattr *sattr, struct nfs4_label *label)
109{
110 int err;
111
112 if (label == NULL)
113 return NULL;
114
115 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0)
116 return NULL;
117
aa9c2669
DQ		 118 err = security_dentry_init_security(dentry, sattr->ia_mode,
119 &dentry->d_name, (void **)&label->label, &label->len);
120 if (err == 0)
121 return label;
122
123 return NULL;
124}
125static inline void
126nfs4_label_release_security(struct nfs4_label *label)
127{
128 if (label)
129 security_release_secctx(label->label, label->len);
130}
131static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
132{
133 if (label)
134 return server->attr_bitmask;
135
136 return server->attr_bitmask_nl;
137}
138#else
139static inline struct nfs4_label *
140nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
141 struct iattr *sattr, struct nfs4_label *l)
142{ return NULL; }
143static inline void
144nfs4_label_release_security(struct nfs4_label *label)
145{ return; }
146static inline u32 *
147nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
148{ return server->attr_bitmask; }
149#endif
150
1da177e4 151/* Prevent leaks of NFSv4 errors into userland */
46f72f57 152static int nfs4_map_errors(int err)
1da177e4 153{
52567b03
TM		 154 if (err >= -1000)
155 return err;
156 switch (err) {
157 case -NFS4ERR_RESOURCE:
30005121
WAA		 158 case -NFS4ERR_LAYOUTTRYLATER:
159 case -NFS4ERR_RECALLCONFLICT:
52567b03 160 return -EREMOTEIO;
7ebb9315 161 case -NFS4ERR_WRONGSEC:
8897538e 162 case -NFS4ERR_WRONG_CRED:
7ebb9315 163 return -EPERM;
3ddeb7c5
TM		 164 case -NFS4ERR_BADOWNER:
165 case -NFS4ERR_BADNAME:
166 return -EINVAL;
fb13bfa7
TM		 167 case -NFS4ERR_SHARE_DENIED:
168 return -EACCES;
f25efd85
SD		 169 case -NFS4ERR_MINOR_VERS_MISMATCH:
170 return -EPROTONOSUPPORT;
6e3cf241
TM		 171 case -NFS4ERR_FILE_OPEN:
172 return -EBUSY;
52567b03 173 default:
1da177e4 174 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 175 __func__, -err);
52567b03 176 break;
1da177e4 177 }
52567b03 178 return -EIO;
1da177e4
LT		 179}
180
181/*
182 * This is our standard bitmap for GETATTR requests.
183 */
1549210f 184const u32 nfs4_fattr_bitmap[3] = {
1da177e4
LT		 185 FATTR4_WORD0_TYPE
186 | FATTR4_WORD0_CHANGE
187 | FATTR4_WORD0_SIZE
188 | FATTR4_WORD0_FSID
189 | FATTR4_WORD0_FILEID,
190 FATTR4_WORD1_MODE
191 | FATTR4_WORD1_NUMLINKS
192 | FATTR4_WORD1_OWNER
193 | FATTR4_WORD1_OWNER_GROUP
194 | FATTR4_WORD1_RAWDEV
195 | FATTR4_WORD1_SPACE_USED
196 | FATTR4_WORD1_TIME_ACCESS
197 | FATTR4_WORD1_TIME_METADATA
ea96d1ec
AS		 198 | FATTR4_WORD1_TIME_MODIFY
199 | FATTR4_WORD1_MOUNTED_ON_FILEID,
aa9c2669
DQ		 200#ifdef CONFIG_NFS_V4_SECURITY_LABEL
201 FATTR4_WORD2_SECURITY_LABEL
202#endif
1da177e4
LT		 203};
204
1549210f
TM		 205static const u32 nfs4_pnfs_open_bitmap[3] = {
206 FATTR4_WORD0_TYPE
207 | FATTR4_WORD0_CHANGE
208 | FATTR4_WORD0_SIZE
209 | FATTR4_WORD0_FSID
210 | FATTR4_WORD0_FILEID,
211 FATTR4_WORD1_MODE
212 | FATTR4_WORD1_NUMLINKS
213 | FATTR4_WORD1_OWNER
214 | FATTR4_WORD1_OWNER_GROUP
215 | FATTR4_WORD1_RAWDEV
216 | FATTR4_WORD1_SPACE_USED
217 | FATTR4_WORD1_TIME_ACCESS
218 | FATTR4_WORD1_TIME_METADATA
219 | FATTR4_WORD1_TIME_MODIFY,
220 FATTR4_WORD2_MDSTHRESHOLD
95864c91
TM		 221#ifdef CONFIG_NFS_V4_SECURITY_LABEL
222 | FATTR4_WORD2_SECURITY_LABEL
223#endif
1549210f
TM		 224};
225
e23008ec
AA		 226static const u32 nfs4_open_noattr_bitmap[3] = {
227 FATTR4_WORD0_TYPE
e23008ec
AA		 228 | FATTR4_WORD0_FILEID,
229};
230
a09df2ca 231const u32 nfs4_statfs_bitmap[3] = {
1da177e4
LT		 232 FATTR4_WORD0_FILES_AVAIL
233 | FATTR4_WORD0_FILES_FREE
234 | FATTR4_WORD0_FILES_TOTAL,
235 FATTR4_WORD1_SPACE_AVAIL
236 | FATTR4_WORD1_SPACE_FREE
237 | FATTR4_WORD1_SPACE_TOTAL
238};
239
a09df2ca 240const u32 nfs4_pathconf_bitmap[3] = {
1da177e4
LT		 241 FATTR4_WORD0_MAXLINK
242 | FATTR4_WORD0_MAXNAME,
243 0
244};
245
dae100c2 246const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
1da177e4
LT		 247 | FATTR4_WORD0_MAXREAD
248 | FATTR4_WORD0_MAXWRITE
249 | FATTR4_WORD0_LEASE_TIME,
55b6e774 250 FATTR4_WORD1_TIME_DELTA
dae100c2
FI		 251 | FATTR4_WORD1_FS_LAYOUT_TYPES,
252 FATTR4_WORD2_LAYOUT_BLKSIZE
2a92ee92 253 | FATTR4_WORD2_CLONE_BLKSIZE
1da177e4
LT		 254};
255
a09df2ca 256const u32 nfs4_fs_locations_bitmap[3] = {
830b8e33
MN		 257 FATTR4_WORD0_TYPE
258 | FATTR4_WORD0_CHANGE
259 | FATTR4_WORD0_SIZE
260 | FATTR4_WORD0_FSID
261 | FATTR4_WORD0_FILEID
262 | FATTR4_WORD0_FS_LOCATIONS,
263 FATTR4_WORD1_MODE
264 | FATTR4_WORD1_NUMLINKS
265 | FATTR4_WORD1_OWNER
266 | FATTR4_WORD1_OWNER_GROUP
267 | FATTR4_WORD1_RAWDEV
268 | FATTR4_WORD1_SPACE_USED
269 | FATTR4_WORD1_TIME_ACCESS
270 | FATTR4_WORD1_TIME_METADATA
271 | FATTR4_WORD1_TIME_MODIFY
a09df2ca 272 | FATTR4_WORD1_MOUNTED_ON_FILEID,
830b8e33
MN		 273};
274
bc4785cd 275static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 276 struct nfs4_readdir_arg *readdir)
277{
18fe6a23 278 unsigned int attrs = FATTR4_WORD0_FILEID | FATTR4_WORD0_TYPE;
0dbb4c67 279 __be32 *start, *p;
1da177e4 280
1da177e4 281 if (cookie > 2) {
b7ef1956 282 readdir->cookie = cookie;
1da177e4
LT		 283 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
284 return;
285 }
286
287 readdir->cookie = 0;
288 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
289 if (cookie == 2)
290 return;
291
292 /*
293 * NFSv4 servers do not return entries for '.' and '..'
294 * Therefore, we fake these entries here. We let '.'
295 * have cookie 0 and '..' have cookie 1. Note that
296 * when talking to the server, we always send cookie 0
297 * instead of 1 or 2.
298 */
2b86ce2d 299 start = p = kmap_atomic(*readdir->pages);
1da177e4
LT		 300
301 if (cookie == 0) {
302 *p++ = xdr_one; /* next */
303 *p++ = xdr_zero; /* cookie, first word */
304 *p++ = xdr_one; /* cookie, second word */
305 *p++ = xdr_one; /* entry len */
306 memcpy(p, ".\0\0\0", 4); /* entry */
307 p++;
308 *p++ = xdr_one; /* bitmap length */
18fe6a23
AS		 309 *p++ = htonl(attrs); /* bitmap */
310 *p++ = htonl(12); /* attribute buffer length */
311 *p++ = htonl(NF4DIR);
2b0143b5 312 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry)));
1da177e4
LT		 313 }
314
315 *p++ = xdr_one; /* next */
316 *p++ = xdr_zero; /* cookie, first word */
317 *p++ = xdr_two; /* cookie, second word */
318 *p++ = xdr_two; /* entry len */
319 memcpy(p, "..\0\0", 4); /* entry */
320 p++;
321 *p++ = xdr_one; /* bitmap length */
18fe6a23
AS		 322 *p++ = htonl(attrs); /* bitmap */
323 *p++ = htonl(12); /* attribute buffer length */
324 *p++ = htonl(NF4DIR);
2b0143b5 325 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry->d_parent)));
1da177e4
LT		 326
327 readdir->pgbase = (char *)p - (char *)start;
328 readdir->count -= readdir->pgbase;
2b86ce2d 329 kunmap_atomic(start);
1da177e4
LT		 330}
331
26d36301
TM		 332static void nfs4_test_and_free_stateid(struct nfs_server *server,
333 nfs4_stateid *stateid,
334 struct rpc_cred *cred)
335{
336 const struct nfs4_minor_version_ops *ops = server->nfs_client->cl_mvops;
337
338 ops->test_and_free_expired(server, stateid, cred);
339}
340
341static void __nfs4_free_revoked_stateid(struct nfs_server *server,
342 nfs4_stateid *stateid,
343 struct rpc_cred *cred)
344{
345 stateid->type = NFS4_REVOKED_STATEID_TYPE;
346 nfs4_test_and_free_stateid(server, stateid, cred);
347}
348
349static void nfs4_free_revoked_stateid(struct nfs_server *server,
350 const nfs4_stateid *stateid,
351 struct rpc_cred *cred)
352{
353 nfs4_stateid tmp;
354
355 nfs4_stateid_copy(&tmp, stateid);
356 __nfs4_free_revoked_stateid(server, &tmp, cred);
357}
358
8478eaa1
N		 359static long nfs4_update_delay(long *timeout)
360{
361 long ret;
362 if (!timeout)
363 return NFS4_POLL_RETRY_MAX;
364 if (*timeout <= 0)
365 *timeout = NFS4_POLL_RETRY_MIN;
366 if (*timeout > NFS4_POLL_RETRY_MAX)
367 *timeout = NFS4_POLL_RETRY_MAX;
368 ret = *timeout;
369 *timeout <<= 1;
370 return ret;
371}
372
65de872e
TM		 373static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
374{
375 int res = 0;
376
377 might_sleep();
378
8478eaa1
N		 379 freezable_schedule_timeout_killable_unsafe(
380 nfs4_update_delay(timeout));
65de872e
TM		 381 if (fatal_signal_pending(current))
382 res = -ERESTARTSYS;
65de872e
TM		 383 return res;
384}
385
386/* This is the error handling routine for processes that are allowed
387 * to sleep.
388 */
b3c2aa07
TM		 389static int nfs4_do_handle_exception(struct nfs_server *server,
390 int errorcode, struct nfs4_exception *exception)
65de872e
TM		 391{
392 struct nfs_client *clp = server->nfs_client;
9e33bed5 393 struct nfs4_state *state = exception->state;
8487c479 394 const nfs4_stateid *stateid = exception->stateid;
3114ea7a 395 struct inode *inode = exception->inode;
65de872e
TM		 396 int ret = errorcode;
397
b3c2aa07
TM		 398 exception->delay = 0;
399 exception->recovering = 0;
65de872e 400 exception->retry = 0;
272289a3
TM		 401
402 if (stateid == NULL && state != NULL)
403 stateid = &state->stateid;
404
65de872e
TM		 405 switch(errorcode) {
406 case 0:
407 return 0;
5ba12443
TM		 408 case -NFS4ERR_DELEG_REVOKED:
409 case -NFS4ERR_ADMIN_REVOKED:
272289a3 410 case -NFS4ERR_EXPIRED:
5ba12443 411 case -NFS4ERR_BAD_STATEID:
272289a3
TM		 412 if (inode != NULL && stateid != NULL) {
413 nfs_inode_find_state_and_recover(inode,
414 stateid);
415 goto wait_on_recovery;
416 }
417 case -NFS4ERR_OPENMODE:
8487c479
TM		 418 if (inode) {
419 int err;
420
421 err = nfs_async_inode_return_delegation(inode,
422 stateid);
423 if (err == 0)
424 goto wait_on_recovery;
425 if (stateid != NULL && stateid->type == NFS4_DELEGATION_STATEID_TYPE) {
426 exception->retry = 1;
427 break;
428 }
429 }
3114ea7a
TM		 430 if (state == NULL)
431 break;
5d422301
TM		 432 ret = nfs4_schedule_stateid_recovery(server, state);
433 if (ret < 0)
434 break;
3114ea7a 435 goto wait_on_recovery;
65de872e 436 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 437 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 438 nfs4_schedule_lease_recovery(clp);
439 goto wait_on_recovery;
519ae255
CL		 440 case -NFS4ERR_MOVED:
441 ret = nfs4_schedule_migration_recovery(server);
442 if (ret < 0)
443 break;
444 goto wait_on_recovery;
8ef2f8d4
CL		 445 case -NFS4ERR_LEASE_MOVED:
446 nfs4_schedule_lease_moved_recovery(clp);
447 goto wait_on_recovery;
03391693 448#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 449 case -NFS4ERR_BADSESSION:
450 case -NFS4ERR_BADSLOT:
451 case -NFS4ERR_BAD_HIGH_SLOT:
452 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
453 case -NFS4ERR_DEADSESSION:
454 case -NFS4ERR_SEQ_FALSE_RETRY:
455 case -NFS4ERR_SEQ_MISORDERED:
456 dprintk("%s ERROR: %d Reset session\n", __func__,
457 errorcode);
9f594791 458 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
399f11c3 459 goto wait_on_recovery;
03391693 460#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 461 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 462 if (exception->timeout > HZ) {
463 /* We have retried a decent amount, time to
464 * fail
465 */
466 ret = -EBUSY;
467 break;
468 }
65de872e 469 case -NFS4ERR_DELAY:
2598ed34
TM		 470 nfs_inc_server_stats(server, NFSIOS_DELAY);
471 case -NFS4ERR_GRACE:
e85d7ee4 472 case -NFS4ERR_LAYOUTTRYLATER:
183d9e7b 473 case -NFS4ERR_RECALLCONFLICT:
b3c2aa07
TM		 474 exception->delay = 1;
475 return 0;
476
a8a4ae3a 477 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 478 case -NFS4ERR_OLD_STATEID:
479 exception->retry = 1;
b064eca2
TM		 480 break;
481 case -NFS4ERR_BADOWNER:
482 /* The following works around a Linux server bug! */
483 case -NFS4ERR_BADNAME:
484 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
485 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
486 exception->retry = 1;
487 printk(KERN_WARNING "NFS: v4 server %s "
488 "does not accept raw "
489 "uid/gids. "
490 "Reenabling the idmapper.\n",
491 server->nfs_client->cl_hostname);
492 }
65de872e
TM		 493 }
494 /* We failed to handle the error */
495 return nfs4_map_errors(ret);
0400a6b0 496wait_on_recovery:
b3c2aa07
TM		 497 exception->recovering = 1;
498 return 0;
499}
500
501/* This is the error handling routine for processes that are allowed
502 * to sleep.
503 */
504int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
505{
506 struct nfs_client *clp = server->nfs_client;
507 int ret;
508
509 ret = nfs4_do_handle_exception(server, errorcode, exception);
510 if (exception->delay) {
511 ret = nfs4_delay(server->client, &exception->timeout);
512 goto out_retry;
513 }
514 if (exception->recovering) {
515 ret = nfs4_wait_clnt_recover(clp);
516 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
517 return -EIO;
518 goto out_retry;
519 }
520 return ret;
521out_retry:
a2c0b9e2
TM		 522 if (ret == 0)
523 exception->retry = 1;
524 return ret;
65de872e
TM		 525}
526
037fc980
TM		 527static int
528nfs4_async_handle_exception(struct rpc_task *task, struct nfs_server *server,
529 int errorcode, struct nfs4_exception *exception)
530{
531 struct nfs_client *clp = server->nfs_client;
532 int ret;
533
534 ret = nfs4_do_handle_exception(server, errorcode, exception);
535 if (exception->delay) {
536 rpc_delay(task, nfs4_update_delay(&exception->timeout));
537 goto out_retry;
538 }
539 if (exception->recovering) {
540 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
541 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
542 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
543 goto out_retry;
544 }
519ae255 545 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
037fc980
TM		 546 ret = -EIO;
547 return ret;
548out_retry:
a2c0b9e2
TM		 549 if (ret == 0)
550 exception->retry = 1;
551 return ret;
65de872e
TM		 552}
553
037fc980
TM		 554static int
555nfs4_async_handle_error(struct rpc_task *task, struct nfs_server *server,
556 struct nfs4_state *state, long *timeout)
557{
558 struct nfs4_exception exception = {
559 .state = state,
560 };
561
562 if (task->tk_status >= 0)
563 return 0;
564 if (timeout)
565 exception.timeout = *timeout;
566 task->tk_status = nfs4_async_handle_exception(task, server,
567 task->tk_status,
568 &exception);
569 if (exception.delay && timeout)
570 *timeout = exception.timeout;
571 if (exception.retry)
572 return -EAGAIN;
573 return 0;
574}
575
a5250def
WAA		 576/*
577 * Return 'true' if 'clp' is using an rpc_client that is integrity protected
578 * or 'false' otherwise.
579 */
580static bool _nfs4_is_integrity_protected(struct nfs_client *clp)
581{
582 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor;
eeea5361 583 return (flavor == RPC_AUTH_GSS_KRB5I) || (flavor == RPC_AUTH_GSS_KRB5P);
a5250def 584}
65de872e 585
452e9352 586static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 587{
1da177e4
LT		 588 spin_lock(&clp->cl_lock);
589 if (time_before(clp->cl_last_renewal,timestamp))
590 clp->cl_last_renewal = timestamp;
591 spin_unlock(&clp->cl_lock);
592}
593
452e9352
TM		 594static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
595{
be824167
TM		 596 struct nfs_client *clp = server->nfs_client;
597
598 if (!nfs4_has_session(clp))
599 do_renew_lease(clp, timestamp);
452e9352
TM		 600}
601
2a3eb2b9
CL		 602struct nfs4_call_sync_data {
603 const struct nfs_server *seq_server;
604 struct nfs4_sequence_args *seq_args;
605 struct nfs4_sequence_res *seq_res;
606};
607
be3a5d23
TM		 608void nfs4_init_sequence(struct nfs4_sequence_args *args,
609 struct nfs4_sequence_res *res, int cache_reply)
a9c92d6b
CL		 610{
611 args->sa_slot = NULL;
612 args->sa_cache_this = cache_reply;
613 args->sa_privileged = 0;
614
615 res->sr_slot = NULL;
616}
617
618static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
619{
620 args->sa_privileged = 1;
621}
622
2e80dbe7 623static void nfs40_sequence_free_slot(struct nfs4_sequence_res *res)
3bd2384a
CL		 624{
625 struct nfs4_slot *slot = res->sr_slot;
626 struct nfs4_slot_table *tbl;
627
3bd2384a
CL		 628 tbl = slot->table;
629 spin_lock(&tbl->slot_tbl_lock);
630 if (!nfs41_wake_and_assign_slot(tbl, slot))
631 nfs4_free_slot(tbl, slot);
632 spin_unlock(&tbl->slot_tbl_lock);
633
634 res->sr_slot = NULL;
2e80dbe7
TM		 635}
636
637static int nfs40_sequence_done(struct rpc_task *task,
638 struct nfs4_sequence_res *res)
639{
640 if (res->sr_slot != NULL)
641 nfs40_sequence_free_slot(res);
3bd2384a
CL		 642 return 1;
643}
644
cccef3b9
AA		 645#if defined(CONFIG_NFS_V4_1)
646
d185a334 647static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871 648{
e3725ec0 649 struct nfs4_session *session;
13615871 650 struct nfs4_slot_table *tbl;
a13ce7c6 651 struct nfs4_slot *slot = res->sr_slot;
c10e4498 652 bool send_new_highest_used_slotid = false;
13615871 653
a13ce7c6 654 tbl = slot->table;
e3725ec0 655 session = tbl->session;
ea028ac9 656
07e8dcbd
TM		 657 /* Bump the slot sequence number */
658 if (slot->seq_done)
659 slot->seq_nr++;
660 slot->seq_done = 0;
661
35dc1d74 662 spin_lock(&tbl->slot_tbl_lock);
c10e4498
TM		 663 /* Be nice to the server: try to ensure that the last transmitted
664 * value for highest_user_slotid <= target_highest_slotid
665 */
666 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
667 send_new_highest_used_slotid = true;
668
a13ce7c6 669 if (nfs41_wake_and_assign_slot(tbl, slot)) {
b75ad4cd
TM		 670 send_new_highest_used_slotid = false;
671 goto out_unlock;
672 }
a13ce7c6 673 nfs4_free_slot(tbl, slot);
c10e4498
TM		 674
675 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
676 send_new_highest_used_slotid = false;
b75ad4cd 677out_unlock:
35dc1d74 678 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 679 res->sr_slot = NULL;
c10e4498 680 if (send_new_highest_used_slotid)
3f10a6af 681 nfs41_notify_server(session->clp);
045d2a6d
TM		 682 if (waitqueue_active(&tbl->slot_waitq))
683 wake_up_all(&tbl->slot_waitq);
13615871
AA		 684}
685
2e80dbe7
TM		 686static int nfs41_sequence_process(struct rpc_task *task,
687 struct nfs4_sequence_res *res)
b0df806c 688{
e3725ec0 689 struct nfs4_session *session;
a13ce7c6 690 struct nfs4_slot *slot = res->sr_slot;
14516c3a 691 struct nfs_client *clp;
ac20d163 692 bool interrupted = false;
85563073 693 int ret = 1;
b0df806c 694
a13ce7c6
TM		 695 if (slot == NULL)
696 goto out_noaction;
468f8613
BS		 697 /* don't increment the sequence number if the task wasn't sent */
698 if (!RPC_WAS_SENT(task))
b0df806c
AA		 699 goto out;
700
e3725ec0 701 session = slot->table->session;
933602e3 702
ac20d163 703 if (slot->interrupted) {
88bd4f86
OK		 704 if (res->sr_status != -NFS4ERR_DELAY)
705 slot->interrupted = 0;
ac20d163
TM		 706 interrupted = true;
707 }
708
2f92ae34 709 trace_nfs4_sequence_done(session, res);
691daf3b 710 /* Check the SEQUENCE operation status */
14516c3a
TM		 711 switch (res->sr_status) {
712 case 0:
a865880e
OK		 713 /* If previous op on slot was interrupted and we reused
714 * the seq# and got a reply from the cache, then retry
715 */
716 if (task->tk_status == -EREMOTEIO && interrupted) {
717 ++slot->seq_nr;
718 goto retry_nowait;
719 }
b0df806c 720 /* Update the slot's sequence and clientid lease timer */
07e8dcbd 721 slot->seq_done = 1;
e3725ec0 722 clp = session->clp;
8e63b6a8 723 do_renew_lease(clp, res->sr_timestamp);
0629e370 724 /* Check sequence flags */
0a014a44
TM		 725 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags,
726 !!slot->privileged);
464ee9f9 727 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a 728 break;
ac20d163
TM		 729 case 1:
730 /*
731 * sr_status remains 1 if an RPC level error occurred.
732 * The server may or may not have processed the sequence
733 * operation..
734 * Mark the slot as having hosted an interrupted RPC call.
735 */
736 slot->interrupted = 1;
737 goto out;
14516c3a
TM		 738 case -NFS4ERR_DELAY:
739 /* The server detected a resend of the RPC call and
740 * returned NFS4ERR_DELAY as per Section 2.10.6.2
741 * of RFC5661.
742 */
df2fabff 743 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 744 __func__,
df2fabff 745 slot->slot_nr,
933602e3 746 slot->seq_nr);
14516c3a 747 goto out_retry;
85563073
TM		 748 case -NFS4ERR_BADSLOT:
749 /*
750 * The slot id we used was probably retired. Try again
751 * using a different slot id.
752 */
e8794440
TM		 753 goto retry_nowait;
754 case -NFS4ERR_SEQ_MISORDERED:
ac20d163
TM		 755 /*
756 * Was the last operation on this sequence interrupted?
757 * If so, retry after bumping the sequence number.
758 */
759 if (interrupted) {
760 ++slot->seq_nr;
761 goto retry_nowait;
762 }
e8794440
TM		 763 /*
764 * Could this slot have been previously retired?
765 * If so, then the server may be expecting seq_nr = 1!
766 */
8e63b6a8
TM		 767 if (slot->seq_nr != 1) {
768 slot->seq_nr = 1;
769 goto retry_nowait;
770 }
771 break;
e8794440
TM		 772 case -NFS4ERR_SEQ_FALSE_RETRY:
773 ++slot->seq_nr;
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;
a7a3b1e9
BC		 1040 bool rpc_done;
1041 bool file_created;
1042 bool is_recover;
1043 bool cancelled;
24ac23ab 1044 int rpc_status;
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);
a7a3b1e9 1968 data->rpc_done = true;
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 */
a7a3b1e9 1978 if (!data->cancelled)
cdd4e68b
TM		 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);
a7a3b1e9 2021 data->rpc_done = false;
3e309914 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 2030 if (status != 0) {
a7a3b1e9 2031 data->cancelled = true;
cdd4e68b
TM		 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 }
a7a3b1e9 2130 data->rpc_done = true;
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 */
a7a3b1e9 2139 if (!data->cancelled)
24ac23ab
TM		 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);
a7a3b1e9 2185 data->rpc_done = false;
3e309914 2186 data->rpc_status = 0;
a7a3b1e9
BC		 2187 data->cancelled = false;
2188 data->is_recover = false;
bdeca1b7 2189 if (isrecover) {
8fe72bac 2190 nfs4_set_sequence_privileged(&o_arg->seq_args);
a7a3b1e9 2191 data->is_recover = true;
bdeca1b7 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 2197 if (status != 0) {
a7a3b1e9 2198 data->cancelled = true;
d9b67e1e
AS		 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;
1e6f2095 2239 u32 mask, flags;
6168f62c
WAA		 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 */
1e6f2095
AS		 2253 if (S_ISDIR(state->inode->i_mode))
2254 mask = NFS4_ACCESS_LOOKUP;
2255 else
2256 mask = NFS4_ACCESS_EXECUTE;
f3792d63 2257 } else if ((fmode & FMODE_READ) && !opendata->file_created)
1e6f2095 2258 mask = NFS4_ACCESS_READ;
6168f62c
WAA		 2259
2260 cache.cred = cred;
2261 cache.jiffies = jiffies;
2262 nfs_access_set_mask(&cache, opendata->o_res.access_result);
2263 nfs_access_add_cache(state->inode, &cache);
2264
1e6f2095
AS		 2265 flags = NFS4_ACCESS_READ | NFS4_ACCESS_EXECUTE | NFS4_ACCESS_LOOKUP;
2266 if ((mask & ~cache.mask & flags) == 0)
6168f62c
WAA		 2267 return 0;
2268
998f40b5 2269 return -EACCES;
6168f62c
WAA		 2270}
2271
b257957e
AB		 2272/*
2273 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2274 */
2275static int _nfs4_proc_open(struct nfs4_opendata *data)
2276{
2b0143b5 2277 struct inode *dir = d_inode(data->dir);
b257957e
AB		 2278 struct nfs_server *server = NFS_SERVER(dir);
2279 struct nfs_openargs *o_arg = &data->o_arg;
2280 struct nfs_openres *o_res = &data->o_res;
2281 int status;
2282
2283 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 2284 if (!data->rpc_done)
2285 return status;
2286 if (status != 0) {
2287 if (status == -NFS4ERR_BADNAME &&
2288 !(o_arg->open_flags & O_CREAT))
2289 return -ENOENT;
24ac23ab 2290 return status;
08ef7bd3 2291 }
24ac23ab 2292
6926afd1
TM		 2293 nfs_fattr_map_and_free_names(server, &data->f_attr);
2294
5bc2afc2 2295 if (o_arg->open_flags & O_CREAT) {
5bc2afc2 2296 if (o_arg->open_flags & O_EXCL)
a7a3b1e9 2297 data->file_created = true;
5bc2afc2 2298 else if (o_res->cinfo.before != o_res->cinfo.after)
a7a3b1e9 2299 data->file_created = true;
2dfc6173 2300 if (data->file_created || dir->i_version != o_res->cinfo.after)
d3129ef6
TM		 2301 update_changeattr(dir, &o_res->cinfo,
2302 o_res->f_attr->time_start);
5bc2afc2 2303 }
0df5dd4a
TM		 2304 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2305 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 2306 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 2307 status = _nfs4_proc_open_confirm(data);
1da177e4 2308 if (status != 0)
24ac23ab 2309 return status;
1da177e4 2310 }
56e0d71e
TM		 2311 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR)) {
2312 nfs4_sequence_free_slot(&o_res->seq_res);
8935ef66 2313 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
56e0d71e 2314 }
24ac23ab 2315 return 0;
1da177e4
LT		 2316}
2317
1da177e4
LT		 2318/*
2319 * OPEN_EXPIRED:
2320 * reclaim state on the server after a network partition.
2321 * Assumes caller holds the appropriate lock
2322 */
539cd03a 2323static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 2324{
e56e0b78 2325 struct nfs4_opendata *opendata;
864472e9 2326 int ret;
1da177e4 2327
4a1c0893 2328 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 2329 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 2330 if (IS_ERR(opendata))
2331 return PTR_ERR(opendata);
864472e9 2332 ret = nfs4_open_recover(opendata, state);
35d05778 2333 if (ret == -ESTALE)
3d4ff43d 2334 d_drop(ctx->dentry);
c6d00e63 2335 nfs4_opendata_put(opendata);
864472e9 2336 return ret;
1da177e4
LT		 2337}
2338
a9ed2e25 2339static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 2340{
539cd03a 2341 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 2342 struct nfs4_exception exception = { };
2343 int err;
2344
2345 do {
539cd03a 2346 err = _nfs4_open_expired(ctx, state);
42113a75 2347 trace_nfs4_open_expired(ctx, 0, err);
49f9a0fa
TM		 2348 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2349 continue;
a9ed2e25
TM		 2350 switch (err) {
2351 default:
2352 goto out;
2353 case -NFS4ERR_GRACE:
2354 case -NFS4ERR_DELAY:
2355 nfs4_handle_exception(server, err, &exception);
2356 err = 0;
2357 }
202b50dc 2358 } while (exception.retry);
a9ed2e25 2359out:
202b50dc
TM		 2360 return err;
2361}
2362
1da177e4
LT		 2363static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2364{
1da177e4 2365 struct nfs_open_context *ctx;
864472e9 2366 int ret;
1da177e4 2367
864472e9
TM		 2368 ctx = nfs4_state_find_open_context(state);
2369 if (IS_ERR(ctx))
91876b13 2370 return -EAGAIN;
539cd03a 2371 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 2372 put_nfs_open_context(ctx);
2373 return ret;
1da177e4
LT		 2374}
2375
41020b67
TM		 2376static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state,
2377 const nfs4_stateid *stateid)
4dfd4f7a 2378{
41020b67 2379 nfs_remove_bad_delegation(state->inode, stateid);
4dfd4f7a
TM		 2380 write_seqlock(&state->seqlock);
2381 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2382 write_sequnlock(&state->seqlock);
2383 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2384}
2385
2386static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
2387{
2388 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
41020b67 2389 nfs_finish_clear_delegation_stateid(state, NULL);
4dfd4f7a
TM		 2390}
2391
2392static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2393{
2394 /* NFSv4.0 doesn't allow for delegation recovery on open expire */
2395 nfs40_clear_delegation_stateid(state);
2396 return nfs4_open_expired(sp, state);
2397}
2398
45870d69
TM		 2399static int nfs40_test_and_free_expired_stateid(struct nfs_server *server,
2400 nfs4_stateid *stateid,
2401 struct rpc_cred *cred)
2402{
2403 return -NFS4ERR_BAD_STATEID;
2404}
2405
f062eb6c 2406#if defined(CONFIG_NFS_V4_1)
4586f6e2
TM		 2407static int nfs41_test_and_free_expired_stateid(struct nfs_server *server,
2408 nfs4_stateid *stateid,
2409 struct rpc_cred *cred)
2410{
2411 int status;
2412
f7a62ada
TM		 2413 switch (stateid->type) {
2414 default:
2415 break;
2416 case NFS4_INVALID_STATEID_TYPE:
2417 case NFS4_SPECIAL_STATEID_TYPE:
2418 return -NFS4ERR_BAD_STATEID;
2419 case NFS4_REVOKED_STATEID_TYPE:
2420 goto out_free;
2421 }
4586f6e2 2422
f7a62ada 2423 status = nfs41_test_stateid(server, stateid, cred);
4586f6e2
TM		 2424 switch (status) {
2425 case -NFS4ERR_EXPIRED:
2426 case -NFS4ERR_ADMIN_REVOKED:
2427 case -NFS4ERR_DELEG_REVOKED:
f7a62ada
TM		 2428 break;
2429 default:
4586f6e2
TM		 2430 return status;
2431 }
f7a62ada
TM		 2432out_free:
2433 /* Ack the revoked state to the server */
f0b0bf88 2434 nfs41_free_stateid(server, stateid, cred, true);
f7a62ada 2435 return -NFS4ERR_EXPIRED;
4586f6e2
TM		 2436}
2437
0c116cad 2438static void nfs41_check_delegation_stateid(struct nfs4_state *state)
f062eb6c 2439{
f062eb6c 2440 struct nfs_server *server = NFS_SERVER(state->inode);
0c116cad 2441 nfs4_stateid stateid;
ab7cb0df 2442 struct nfs_delegation *delegation;
0c116cad
TM		 2443 struct rpc_cred *cred;
2444 int status;
3e60ffdd 2445
ab7cb0df
TM		 2446 /* Get the delegation credential for use by test/free_stateid */
2447 rcu_read_lock();
2448 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
0c116cad 2449 if (delegation == NULL) {
ab7cb0df 2450 rcu_read_unlock();
0c116cad
TM		 2451 return;
2452 }
2453
2454 nfs4_stateid_copy(&stateid, &delegation->stateid);
0e3d3e5d
OK		 2455 if (test_bit(NFS_DELEGATION_REVOKED, &delegation->flags) ||
2456 !test_and_clear_bit(NFS_DELEGATION_TEST_EXPIRED,
2457 &delegation->flags)) {
4c8e5447 2458 rcu_read_unlock();
41020b67 2459 nfs_finish_clear_delegation_stateid(state, &stateid);
4c8e5447
TM		 2460 return;
2461 }
0c116cad 2462
0c116cad
TM		 2463 cred = get_rpccred(delegation->cred);
2464 rcu_read_unlock();
4586f6e2 2465 status = nfs41_test_and_free_expired_stateid(server, &stateid, cred);
0c116cad 2466 trace_nfs4_test_delegation_stateid(state, NULL, status);
f7a62ada 2467 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID)
41020b67 2468 nfs_finish_clear_delegation_stateid(state, &stateid);
ab7cb0df 2469
0c116cad 2470 put_rpccred(cred);
3e60ffdd
CL		 2471}
2472
c5896fc8
TM		 2473/**
2474 * nfs41_check_expired_locks - possibly free a lock stateid
2475 *
2476 * @state: NFSv4 state for an inode
2477 *
2478 * Returns NFS_OK if recovery for this stateid is now finished.
2479 * Otherwise a negative NFS4ERR value is returned.
2480 */
2481static int nfs41_check_expired_locks(struct nfs4_state *state)
2482{
2483 int status, ret = NFS_OK;
d75a6a0e 2484 struct nfs4_lock_state *lsp, *prev = NULL;
c5896fc8
TM		 2485 struct nfs_server *server = NFS_SERVER(state->inode);
2486
2487 if (!test_bit(LK_STATE_IN_USE, &state->flags))
2488 goto out;
d75a6a0e
BC		 2489
2490 spin_lock(&state->state_lock);
c5896fc8
TM		 2491 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
2492 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
2493 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
2494
d75a6a0e
BC		 2495 atomic_inc(&lsp->ls_count);
2496 spin_unlock(&state->state_lock);
2497
2498 nfs4_put_lock_state(prev);
2499 prev = lsp;
2500
c5896fc8
TM		 2501 status = nfs41_test_and_free_expired_stateid(server,
2502 &lsp->ls_stateid,
2503 cred);
2504 trace_nfs4_test_lock_stateid(state, lsp, status);
2505 if (status == -NFS4ERR_EXPIRED ||
2506 status == -NFS4ERR_BAD_STATEID) {
2507 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
67dd4830 2508 lsp->ls_stateid.type = NFS4_INVALID_STATEID_TYPE;
c5896fc8
TM		 2509 if (!recover_lost_locks)
2510 set_bit(NFS_LOCK_LOST, &lsp->ls_flags);
2511 } else if (status != NFS_OK) {
2512 ret = status;
d75a6a0e
BC		 2513 nfs4_put_lock_state(prev);
2514 goto out;
c5896fc8 2515 }
d75a6a0e 2516 spin_lock(&state->state_lock);
c5896fc8 2517 }
d75a6a0e
BC		 2518 }
2519 spin_unlock(&state->state_lock);
2520 nfs4_put_lock_state(prev);
c5896fc8
TM		 2521out:
2522 return ret;
2523}
2524
3e60ffdd
CL		 2525/**
2526 * nfs41_check_open_stateid - possibly free an open stateid
2527 *
2528 * @state: NFSv4 state for an inode
2529 *
2530 * Returns NFS_OK if recovery for this stateid is now finished.
2531 * Otherwise a negative NFS4ERR value is returned.
2532 */
2533static int nfs41_check_open_stateid(struct nfs4_state *state)
2534{
2535 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 2536 nfs4_stateid *stateid = &state->open_stateid;
ab7cb0df 2537 struct rpc_cred *cred = state->owner->so_cred;
3e60ffdd
CL		 2538 int status;
2539
b134fc4a 2540 if (test_bit(NFS_OPEN_STATE, &state->flags) == 0) {
8a64c4ef
TM		 2541 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) {
2542 if (nfs4_have_delegation(state->inode, state->state))
2543 return NFS_OK;
2544 return -NFS4ERR_OPENMODE;
2545 }
3e60ffdd 2546 return -NFS4ERR_BAD_STATEID;
b134fc4a 2547 }
4586f6e2 2548 status = nfs41_test_and_free_expired_stateid(server, stateid, cred);
08cb47fa 2549 trace_nfs4_test_open_stateid(state, NULL, status);
f7a62ada 2550 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID) {
3e60ffdd
CL		 2551 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2552 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2553 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 2554 clear_bit(NFS_OPEN_STATE, &state->flags);
67dd4830 2555 stateid->type = NFS4_INVALID_STATEID_TYPE;
8a64c4ef 2556 return status;
c0ca0e59 2557 }
8a64c4ef
TM		 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 2597 if (opendata->o_arg.createmode != NFS4_CREATE_EXCLUSIVE &&
501e7a46
BC		 2598 (attrset[1] & FATTR4_WORD1_MODE ||
2599 attrset[2] & FATTR4_WORD2_MODE_UMASK))
5334c5bd
KM		 2600 sattr->ia_valid &= ~ATTR_MODE;
2601
2602 if (attrset[2] & FATTR4_WORD2_SECURITY_LABEL)
2603 *label = NULL;
aa53ed54
JL		 2604}
2605
c21443c2
TM		 2606static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2607 fmode_t fmode,
2608 int flags,
3efb9722 2609 struct nfs_open_context *ctx)
c21443c2
TM		 2610{
2611 struct nfs4_state_owner *sp = opendata->owner;
2612 struct nfs_server *server = sp->so_server;
275bb307 2613 struct dentry *dentry;
c21443c2
TM		 2614 struct nfs4_state *state;
2615 unsigned int seq;
2616 int ret;
2617
2618 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2619
2620 ret = _nfs4_proc_open(opendata);
dca78001 2621 if (ret != 0)
c21443c2
TM		 2622 goto out;
2623
2624 state = nfs4_opendata_to_nfs4_state(opendata);
2625 ret = PTR_ERR(state);
2626 if (IS_ERR(state))
2627 goto out;
a974deee 2628 ctx->state = state;
c21443c2
TM		 2629 if (server->caps & NFS_CAP_POSIX_LOCK)
2630 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
a8ce377a
JL		 2631 if (opendata->o_res.rflags & NFS4_OPEN_RESULT_MAY_NOTIFY_LOCK)
2632 set_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags);
c21443c2 2633
275bb307 2634 dentry = opendata->dentry;
2b0143b5 2635 if (d_really_is_negative(dentry)) {
668d0cd5 2636 struct dentry *alias;
275bb307 2637 d_drop(dentry);
668d0cd5
AV		 2638 alias = d_exact_alias(dentry, state->inode);
2639 if (!alias)
2640 alias = d_splice_alias(igrab(state->inode), dentry);
2641 /* d_splice_alias() can't fail here - it's a non-directory */
2642 if (alias) {
275bb307 2643 dput(ctx->dentry);
668d0cd5 2644 ctx->dentry = dentry = alias;
275bb307
TM		 2645 }
2646 nfs_set_verifier(dentry,
2b0143b5 2647 nfs_save_change_attribute(d_inode(opendata->dir)));
275bb307
TM		 2648 }
2649
c21443c2
TM		 2650 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2651 if (ret != 0)
2652 goto out;
2653
2b0143b5 2654 if (d_inode(dentry) == state->inode) {
c45ffdd2
TM		 2655 nfs_inode_attach_open_context(ctx);
2656 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2657 nfs4_schedule_stateid_recovery(server, state);
2658 }
c21443c2
TM		 2659out:
2660 return ret;
2661}
2662
1da177e4 2663/*
24ac23ab 2664 * Returns a referenced nfs4_state
1da177e4 2665 */
82be417a 2666static int _nfs4_do_open(struct inode *dir,
4197a055 2667 struct nfs_open_context *ctx,
82be417a
AA		 2668 int flags,
2669 struct iattr *sattr,
5bc2afc2
TM		 2670 struct nfs4_label *label,
2671 int *opened)
1da177e4
LT		 2672{
2673 struct nfs4_state_owner *sp;
2674 struct nfs4_state *state = NULL;
2675 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 2676 struct nfs4_opendata *opendata;
4197a055
TM		 2677 struct dentry *dentry = ctx->dentry;
2678 struct rpc_cred *cred = ctx->cred;
2679 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2680 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
49f9a0fa 2681 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
1775fd3e 2682 struct nfs4_label *olabel = NULL;
aac00a8d 2683 int status;
1da177e4
LT		 2684
2685 /* Protect against reboot recovery conflicts */
1da177e4 2686 status = -ENOMEM;
d1e284d5
TM		 2687 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2688 if (sp == NULL) {
1da177e4
LT		 2689 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2690 goto out_err;
2691 }
334f87dd 2692 status = nfs4_client_recover_expired_lease(server->nfs_client);
58d9714a 2693 if (status != 0)
b4454fe1 2694 goto err_put_state_owner;
2b0143b5
DH		 2695 if (d_really_is_positive(dentry))
2696 nfs4_return_incompatible_delegation(d_inode(dentry), fmode);
58d9714a 2697 status = -ENOMEM;
2b0143b5 2698 if (d_really_is_positive(dentry))
49f9a0fa 2699 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2700 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
1775fd3e 2701 label, claim, GFP_KERNEL);
e56e0b78 2702 if (opendata == NULL)
95d35cb4 2703 goto err_put_state_owner;
1da177e4 2704
14c43f76
DQ		 2705 if (label) {
2706 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2707 if (IS_ERR(olabel)) {
2708 status = PTR_ERR(olabel);
2709 goto err_opendata_put;
2710 }
2711 }
2712
e911b815
TM		 2713 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2714 if (!opendata->f_attr.mdsthreshold) {
2715 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2716 if (!opendata->f_attr.mdsthreshold)
2717 goto err_free_label;
2718 }
1549210f 2719 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2720 }
2b0143b5
DH		 2721 if (d_really_is_positive(dentry))
2722 opendata->state = nfs4_get_open_state(d_inode(dentry), sp);
aac00a8d 2723
3efb9722 2724 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
6168f62c 2725 if (status != 0)
14c43f76 2726 goto err_free_label;
3efb9722 2727 state = ctx->state;
6168f62c 2728
efcbc04e 2729 if ((opendata->o_arg.open_flags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) &&
549b19cc 2730 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
5334c5bd 2731 nfs4_exclusive_attrset(opendata, sattr, &label);
a1d1c4f1
TM		 2732 /*
2733 * send create attributes which was not set by open
2734 * with an extra setattr.
2735 */
2736 if (sattr->ia_valid & NFS4_VALID_ATTRS) {
2737 nfs_fattr_init(opendata->o_res.f_attr);
2738 status = nfs4_do_setattr(state->inode, cred,
2739 opendata->o_res.f_attr, sattr,
29b59f94 2740 ctx, label, olabel);
a1d1c4f1
TM		 2741 if (status == 0) {
2742 nfs_setattr_update_inode(state->inode, sattr,
2743 opendata->o_res.f_attr);
2744 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
2745 }
1775fd3e 2746 }
0ab64e0e 2747 }
c5c3fb5f 2748 if (opened && opendata->file_created)
5bc2afc2 2749 *opened |= FILE_CREATED;
82be417a 2750
e911b815 2751 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
82be417a 2752 *ctx_th = opendata->f_attr.mdsthreshold;
e911b815
TM		 2753 opendata->f_attr.mdsthreshold = NULL;
2754 }
82be417a 2755
14c43f76
DQ		 2756 nfs4_label_free(olabel);
2757
c6d00e63 2758 nfs4_opendata_put(opendata);
1da177e4 2759 nfs4_put_state_owner(sp);
1da177e4 2760 return 0;
14c43f76
DQ		 2761err_free_label:
2762 nfs4_label_free(olabel);
c6d00e63
TM		 2763err_opendata_put:
2764 nfs4_opendata_put(opendata);
e56e0b78
TM		 2765err_put_state_owner:
2766 nfs4_put_state_owner(sp);
1da177e4 2767out_err:
1da177e4
LT		 2768 return status;
2769}
2770
2771
82be417a 2772static struct nfs4_state *nfs4_do_open(struct inode *dir,
4197a055 2773 struct nfs_open_context *ctx,
82be417a
AA		 2774 int flags,
2775 struct iattr *sattr,
5bc2afc2
TM		 2776 struct nfs4_label *label,
2777 int *opened)
1da177e4 2778{
49f9a0fa 2779 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2780 struct nfs4_exception exception = { };
2781 struct nfs4_state *res;
2782 int status;
2783
2784 do {
5bc2afc2 2785 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
3efb9722 2786 res = ctx->state;
42113a75 2787 trace_nfs4_open_file(ctx, flags, status);
1da177e4
LT		 2788 if (status == 0)
2789 break;
2790 /* NOTE: BAD_SEQID means the server and client disagree about the
2791 * book-keeping w.r.t. state-changing operations
2792 * (OPEN/CLOSE/LOCK/LOCKU...)
2793 * It is actually a sign of a bug on the client or on the server.
2794 *
2795 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2796 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2797 * have unhashed the old state_owner for us, and that we can
2798 * therefore safely retry using a new one. We should still warn
2799 * the user though...
2800 */
2801 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2802 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2803 " returned a bad sequence-id error!\n",
2804 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2805 exception.retry = 1;
2806 continue;
2807 }
550f5747
TM		 2808 /*
2809 * BAD_STATEID on OPEN means that the server cancelled our
2810 * state before it received the OPEN_CONFIRM.
2811 * Recover by retrying the request as per the discussion
2812 * on Page 181 of RFC3530.
2813 */
2814 if (status == -NFS4ERR_BAD_STATEID) {
2815 exception.retry = 1;
2816 continue;
2817 }
aac00a8d
TM		 2818 if (status == -EAGAIN) {
2819 /* We must have found a delegation */
2820 exception.retry = 1;
2821 continue;
2822 }
49f9a0fa
TM		 2823 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2824 continue;
2825 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2826 status, &exception));
2827 } while (exception.retry);
2828 return res;
2829}
2830
8487c479
TM		 2831static int _nfs4_do_setattr(struct inode *inode,
2832 struct nfs_setattrargs *arg,
2833 struct nfs_setattrres *res,
2834 struct rpc_cred *cred,
29b59f94 2835 struct nfs_open_context *ctx)
1da177e4 2836{
3e4f6290 2837 struct nfs_server *server = NFS_SERVER(inode);
d9b67e1e 2838 struct rpc_message msg = {
659bfcd6 2839 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
8487c479
TM		 2840 .rpc_argp = arg,
2841 .rpc_resp = res,
659bfcd6 2842 .rpc_cred = cred,
d9b67e1e 2843 };
abf4e13c 2844 struct rpc_cred *delegation_cred = NULL;
26e976a8 2845 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2846 fmode_t fmode;
2847 bool truncate;
65e4308d 2848 int status;
1da177e4 2849
8487c479 2850 nfs_fattr_init(res->fattr);
1da177e4 2851
ee3ae84e 2852 /* Servers should only apply open mode checks for file size changes */
8487c479 2853 truncate = (arg->iap->ia_valid & ATTR_SIZE) ? true : false;
ee3ae84e
TM		 2854 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2855
8487c479 2856 if (nfs4_copy_delegation_stateid(inode, fmode, &arg->stateid, &delegation_cred)) {
ee3ae84e 2857 /* Use that stateid */
29b59f94 2858 } else if (truncate && ctx != NULL) {
17393475 2859 struct nfs_lock_context *l_ctx;
29b59f94 2860 if (!nfs4_valid_open_stateid(ctx->state))
0418dae1 2861 return -EBADF;
17393475
N		 2862 l_ctx = nfs_get_lock_context(ctx);
2863 if (IS_ERR(l_ctx))
2864 return PTR_ERR(l_ctx);
7a0566b3
N		 2865 status = nfs4_select_rw_stateid(ctx->state, FMODE_WRITE, l_ctx,
2866 &arg->stateid, &delegation_cred);
2867 nfs_put_lock_context(l_ctx);
2868 if (status == -EIO)
0418dae1 2869 return -EBADF;
08e9eac4 2870 } else
8487c479 2871 nfs4_stateid_copy(&arg->stateid, &zero_stateid);
abf4e13c
TM		 2872 if (delegation_cred)
2873 msg.rpc_cred = delegation_cred;
1da177e4 2874
8487c479 2875 status = nfs4_call_sync(server->client, server, &msg, &arg->seq_args, &res->seq_res, 1);
abf4e13c
TM		 2876
2877 put_rpccred(delegation_cred);
29b59f94 2878 if (status == 0 && ctx != NULL)
26e976a8 2879 renew_lease(server, timestamp);
8487c479 2880 trace_nfs4_setattr(inode, &arg->stateid, status);
65e4308d 2881 return status;
1da177e4
LT		 2882}
2883
659bfcd6
TM		 2884static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2885 struct nfs_fattr *fattr, struct iattr *sattr,
29b59f94 2886 struct nfs_open_context *ctx, struct nfs4_label *ilabel,
1775fd3e 2887 struct nfs4_label *olabel)
1da177e4 2888{
3e4f6290 2889 struct nfs_server *server = NFS_SERVER(inode);
29b59f94 2890 struct nfs4_state *state = ctx ? ctx->state : NULL;
d9b67e1e
AS		 2891 struct nfs_setattrargs arg = {
2892 .fh = NFS_FH(inode),
2893 .iap = sattr,
8487c479
TM		 2894 .server = server,
2895 .bitmask = server->attr_bitmask,
2896 .label = ilabel,
d9b67e1e
AS		 2897 };
2898 struct nfs_setattrres res = {
8487c479
TM		 2899 .fattr = fattr,
2900 .label = olabel,
2901 .server = server,
d9b67e1e 2902 };
a1d0b5ee
TM		 2903 struct nfs4_exception exception = {
2904 .state = state,
3114ea7a 2905 .inode = inode,
8487c479 2906 .stateid = &arg.stateid,
a1d0b5ee 2907 };
1da177e4 2908 int err;
8487c479
TM		 2909
2910 arg.bitmask = nfs4_bitmask(server, ilabel);
2911 if (ilabel)
2912 arg.bitmask = nfs4_bitmask(server, olabel);
2913
1da177e4 2914 do {
29b59f94 2915 err = _nfs4_do_setattr(inode, &arg, &res, cred, ctx);
451146be
TM		 2916 switch (err) {
2917 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 2918 if (!(sattr->ia_valid & ATTR_SIZE)) {
2919 pr_warn_once("NFSv4: server %s is incorrectly "
2920 "applying open mode checks to "
2921 "a SETATTR that is not "
2922 "changing file size.\n",
2923 server->nfs_client->cl_hostname);
2924 }
451146be
TM		 2925 if (state && !(state->state & FMODE_WRITE)) {
2926 err = -EBADF;
2927 if (sattr->ia_valid & ATTR_OPEN)
2928 err = -EACCES;
2929 goto out;
2930 }
2931 }
2932 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2933 } while (exception.retry);
451146be 2934out:
1da177e4
LT		 2935 return err;
2936}
2937
500d701f
PT		 2938static bool
2939nfs4_wait_on_layoutreturn(struct inode *inode, struct rpc_task *task)
2940{
2941 if (inode == NULL || !nfs_have_layout(inode))
2942 return false;
2943
2944 return pnfs_wait_on_layoutreturn(inode, task);
2945}
2946
1da177e4
LT		 2947struct nfs4_closedata {
2948 struct inode *inode;
2949 struct nfs4_state *state;
2950 struct nfs_closeargs arg;
2951 struct nfs_closeres res;
cf805165
TM		 2952 struct {
2953 struct nfs4_layoutreturn_args arg;
2954 struct nfs4_layoutreturn_res res;
4d796d75 2955 struct nfs4_xdr_opaque_data ld_private;
cf805165
TM		 2956 u32 roc_barrier;
2957 bool roc;
2958 } lr;
516a6af6 2959 struct nfs_fattr fattr;
26e976a8 2960 unsigned long timestamp;
1da177e4
LT		 2961};
2962
963d8fe5 2963static void nfs4_free_closedata(void *data)
9512135d 2964{
963d8fe5
TM		 2965 struct nfs4_closedata *calldata = data;
2966 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2967 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2968
cf805165 2969 if (calldata->lr.roc)
1c5bd76d
TM		 2970 pnfs_roc_release(&calldata->lr.arg, &calldata->lr.res,
2971 calldata->res.lr_ret);
9512135d
TM		 2972 nfs4_put_open_state(calldata->state);
2973 nfs_free_seqid(calldata->arg.seqid);
9512135d 2974 nfs4_put_state_owner(sp);
322b2b90 2975 nfs_sb_deactive(sb);
9512135d
TM		 2976 kfree(calldata);
2977}
2978
963d8fe5 2979static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2980{
963d8fe5 2981 struct nfs4_closedata *calldata = data;
1da177e4 2982 struct nfs4_state *state = calldata->state;
1da177e4 2983 struct nfs_server *server = NFS_SERVER(calldata->inode);
412f6c4c 2984 nfs4_stateid *res_stateid = NULL;
1da177e4 2985
a3ca5651 2986 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2987 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2988 return;
42113a75 2989 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
cf805165
TM		 2990
2991 /* Handle Layoutreturn errors */
2992 if (calldata->arg.lr_args && task->tk_status != 0) {
2993 switch (calldata->res.lr_ret) {
2994 default:
2995 calldata->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
2996 break;
2997 case 0:
2998 calldata->arg.lr_args = NULL;
2999 calldata->res.lr_res = NULL;
3000 break;
3001 case -NFS4ERR_ADMIN_REVOKED:
3002 case -NFS4ERR_DELEG_REVOKED:
3003 case -NFS4ERR_EXPIRED:
3004 case -NFS4ERR_BAD_STATEID:
3005 case -NFS4ERR_OLD_STATEID:
3006 case -NFS4ERR_UNKNOWN_LAYOUTTYPE:
3007 case -NFS4ERR_WRONG_CRED:
3008 calldata->arg.lr_args = NULL;
3009 calldata->res.lr_res = NULL;
3010 calldata->res.lr_ret = 0;
3011 rpc_restart_call_prepare(task);
3012 return;
3013 }
3014 }
3015
d9b67e1e 3016 /* hmm. we are done with the inode, and in the process of freeing
1da177e4
LT		 3017 * the state_owner. we keep this around to process errors
3018 */
1da177e4
LT		 3019 switch (task->tk_status) {
3020 case 0:
412f6c4c 3021 res_stateid = &calldata->res.stateid;
26e976a8 3022 renew_lease(server, calldata->timestamp);
412f6c4c 3023 break;
f07d4a31
TM		 3024 case -NFS4ERR_ACCESS:
3025 if (calldata->arg.bitmask != NULL) {
3026 calldata->arg.bitmask = NULL;
3027 calldata->res.fattr = NULL;
3028 task->tk_status = 0;
3029 rpc_restart_call_prepare(task);
3030 goto out_release;
3031
3032 }
3033 break;
69794ad7 3034 case -NFS4ERR_ADMIN_REVOKED:
1da177e4 3035 case -NFS4ERR_STALE_STATEID:
26d36301
TM		 3036 case -NFS4ERR_EXPIRED:
3037 nfs4_free_revoked_stateid(server,
3038 &calldata->arg.stateid,
3039 task->tk_msg.rpc_cred);
9e33bed5
TM		 3040 case -NFS4ERR_OLD_STATEID:
3041 case -NFS4ERR_BAD_STATEID:
566fcec6 3042 if (!nfs4_stateid_match(&calldata->arg.stateid,
369d6b7f 3043 &state->open_stateid)) {
566fcec6
TM		 3044 rpc_restart_call_prepare(task);
3045 goto out_release;
3046 }
dc0b027d 3047 if (calldata->arg.fmode == 0)
9e33bed5 3048 break;
1da177e4 3049 default:
8478eaa1 3050 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN) {
72211dbe 3051 rpc_restart_call_prepare(task);
69794ad7
TM		 3052 goto out_release;
3053 }
1da177e4 3054 }
4a1e2feb
TM		 3055 nfs_clear_open_stateid(state, &calldata->arg.stateid,
3056 res_stateid, calldata->arg.fmode);
69794ad7 3057out_release:
72211dbe 3058 nfs_release_seqid(calldata->arg.seqid);
d8d84983 3059 nfs_refresh_inode(calldata->inode, &calldata->fattr);
a3ca5651 3060 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 3061}
3062
4ce70ada 3063static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 3064{
4ce70ada 3065 struct nfs4_closedata *calldata = data;
9512135d 3066 struct nfs4_state *state = calldata->state;
7fdab069 3067 struct inode *inode = calldata->inode;
aee7af35 3068 bool is_rdonly, is_wronly, is_rdwr;
88069f77 3069 int call_close = 0;
9512135d 3070
a3ca5651 3071 dprintk("%s: begin!\n", __func__);
963d8fe5 3072 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 3073 goto out_wait;
003707c7 3074
88069f77 3075 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
4cecb76f 3076 spin_lock(&state->owner->so_lock);
aee7af35
TM		 3077 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
3078 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
3079 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
369d6b7f 3080 nfs4_stateid_copy(&calldata->arg.stateid, &state->open_stateid);
003707c7 3081 /* Calculate the change in open mode */
cd9288ff 3082 calldata->arg.fmode = 0;
e7616923 3083 if (state->n_rdwr == 0) {
cd9288ff
TM		 3084 if (state->n_rdonly == 0)
3085 call_close |= is_rdonly;
3086 else if (is_rdonly)
3087 calldata->arg.fmode |= FMODE_READ;
3088 if (state->n_wronly == 0)
3089 call_close |= is_wronly;
3090 else if (is_wronly)
3091 calldata->arg.fmode |= FMODE_WRITE;
e547f262
TM		 3092 if (calldata->arg.fmode != (FMODE_READ|FMODE_WRITE))
3093 call_close |= is_rdwr;
cd9288ff
TM		 3094 } else if (is_rdwr)
3095 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
3096
5cc7861e
TM		 3097 if (!nfs4_valid_open_stateid(state) ||
3098 test_bit(NFS_OPEN_STATE, &state->flags) == 0)
5d422301 3099 call_close = 0;
4cecb76f 3100 spin_unlock(&state->owner->so_lock);
88069f77
TM		 3101
3102 if (!call_close) {
963d8fe5 3103 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 3104 goto out_no_action;
9512135d 3105 }
88069f77 3106
1c5bd76d 3107 if (!calldata->lr.roc && nfs4_wait_on_layoutreturn(inode, task)) {
500d701f
PT		 3108 nfs_release_seqid(calldata->arg.seqid);
3109 goto out_wait;
3110 }
3111
9413a1a1 3112 if (calldata->arg.fmode == 0)
88069f77 3113 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
3ecefc92 3114
9413a1a1 3115 if (calldata->arg.fmode == 0 || calldata->arg.fmode == FMODE_READ) {
3ecefc92
TM		 3116 /* Close-to-open cache consistency revalidation */
3117 if (!nfs4_have_delegation(inode, FMODE_READ))
3118 calldata->arg.bitmask = NFS_SERVER(inode)->cache_consistency_bitmask;
3119 else
3120 calldata->arg.bitmask = NULL;
3121 }
3c13cb5b 3122
6ae37339
TM		 3123 calldata->arg.share_access =
3124 nfs4_map_atomic_open_share(NFS_SERVER(inode),
3125 calldata->arg.fmode, 0);
88069f77 3126
d8d84983
TM		 3127 if (calldata->res.fattr == NULL)
3128 calldata->arg.bitmask = NULL;
3129 else if (calldata->arg.bitmask == NULL)
3130 calldata->res.fattr = NULL;
26e976a8 3131 calldata->timestamp = jiffies;
42e1cca7 3132 if (nfs4_setup_sequence(NFS_SERVER(inode)->nfs_client,
9d12b216
TM		 3133 &calldata->arg.seq_args,
3134 &calldata->res.seq_res,
2240a9e2
TM		 3135 task) != 0)
3136 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 3137 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 3138 return;
3139out_no_action:
3140 task->tk_action = NULL;
3141out_wait:
3142 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 3143}
3144
963d8fe5 3145static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 3146 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 3147 .rpc_call_done = nfs4_close_done,
3148 .rpc_release = nfs4_free_closedata,
3149};
3150
1da177e4
LT		 3151/*
3152 * It is possible for data to be read/written from a mem-mapped file
3153 * after the sys_close call (which hits the vfs layer as a flush).
3154 * This means that we can't safely call nfsv4 close on a file until
3155 * the inode is cleared. This in turn means that we are not good
3156 * NFSv4 citizens - we do not indicate to the server to update the file's
3157 * share state even when we are done with one of the three share
3158 * stateid's in the inode.
3159 *
3160 * NOTE: Caller must be holding the sp->so_owner semaphore!
3161 */
1f7977c1 3162int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 3163{
4a35bd41 3164 struct nfs_server *server = NFS_SERVER(state->inode);
63f5f796 3165 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
1da177e4 3166 struct nfs4_closedata *calldata;
b39e625b
TM		 3167 struct nfs4_state_owner *sp = state->owner;
3168 struct rpc_task *task;
5138fde0
TM		 3169 struct rpc_message msg = {
3170 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
3171 .rpc_cred = state->owner->so_cred,
3172 };
c970aa85
TM		 3173 struct rpc_task_setup task_setup_data = {
3174 .rpc_client = server->client,
5138fde0 3175 .rpc_message = &msg,
c970aa85 3176 .callback_ops = &nfs4_close_ops,
101070ca 3177 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3178 .flags = RPC_TASK_ASYNC,
3179 };
9512135d 3180 int status = -ENOMEM;
1da177e4 3181
fa940720
WAA		 3182 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
3183 &task_setup_data.rpc_client, &msg);
3184
8535b2be 3185 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 3186 if (calldata == NULL)
9512135d 3187 goto out;
a9c92d6b 3188 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 3189 calldata->inode = state->inode;
1da177e4 3190 calldata->state = state;
4a35bd41 3191 calldata->arg.fh = NFS_FH(state->inode);
1da177e4 3192 /* Serialization for the sequence id */
63f5f796
TM		 3193 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
3194 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask);
badc76dd 3195 if (IS_ERR(calldata->arg.seqid))
9512135d 3196 goto out_free_calldata;
d8d84983 3197 nfs_fattr_init(&calldata->fattr);
dc0b027d 3198 calldata->arg.fmode = 0;
4d796d75 3199 calldata->lr.arg.ld_private = &calldata->lr.ld_private;
516a6af6 3200 calldata->res.fattr = &calldata->fattr;
c1d51931 3201 calldata->res.seqid = calldata->arg.seqid;
516a6af6 3202 calldata->res.server = server;
cf805165 3203 calldata->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
1c5bd76d
TM		 3204 calldata->lr.roc = pnfs_roc(state->inode,
3205 &calldata->lr.arg, &calldata->lr.res, msg.rpc_cred);
3206 if (calldata->lr.roc) {
3207 calldata->arg.lr_args = &calldata->lr.arg;
3208 calldata->res.lr_res = &calldata->lr.res;
3209 }
643168c2 3210 nfs_sb_active(calldata->inode->i_sb);
9512135d 3211
1174dd1f
TM		 3212 msg.rpc_argp = &calldata->arg;
3213 msg.rpc_resp = &calldata->res;
c970aa85
TM		 3214 task_setup_data.callback_data = calldata;
3215 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 3216 if (IS_ERR(task))
3217 return PTR_ERR(task);
a49c3c77
TM		 3218 status = 0;
3219 if (wait)
3220 status = rpc_wait_for_completion_task(task);
b39e625b 3221 rpc_put_task(task);
a49c3c77 3222 return status;
9512135d
TM		 3223out_free_calldata:
3224 kfree(calldata);
3225out:
b39e625b
TM		 3226 nfs4_put_open_state(state);
3227 nfs4_put_state_owner(sp);
9512135d 3228 return status;
1da177e4
LT		 3229}
3230
2b484297 3231static struct inode *
5bc2afc2
TM		 3232nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
3233 int open_flags, struct iattr *attr, int *opened)
1da177e4 3234{
1da177e4 3235 struct nfs4_state *state;
aa9c2669
DQ		 3236 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
3237
3238 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
1da177e4 3239
565277f6 3240 /* Protect against concurrent sillydeletes */
5bc2afc2 3241 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
aa9c2669
DQ		 3242
3243 nfs4_label_release_security(label);
3244
f46e0bd3
TM		 3245 if (IS_ERR(state))
3246 return ERR_CAST(state);
275bb307 3247 return state->inode;
1da177e4
LT		 3248}
3249
1185a552 3250static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 3251{
3252 if (ctx->state == NULL)
3253 return;
3254 if (is_sync)
643168c2 3255 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 3256 else
643168c2 3257 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 3258}
1da177e4 3259
b944dba3
TM		 3260#define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
3261#define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
dff25ddb 3262#define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_MODE_UMASK - 1UL)
b944dba3 3263
1da177e4
LT		 3264static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
3265{
8c61282f 3266 u32 bitmask[3] = {}, minorversion = server->nfs_client->cl_minorversion;
43652ad5
BH		 3267 struct nfs4_server_caps_arg args = {
3268 .fhandle = fhandle,
8c61282f 3269 .bitmask = bitmask,
43652ad5 3270 };
1da177e4
LT		 3271 struct nfs4_server_caps_res res = {};
3272 struct rpc_message msg = {
3273 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 3274 .rpc_argp = &args,
1da177e4
LT		 3275 .rpc_resp = &res,
3276 };
3277 int status;
f4b23de3 3278 int i;
1da177e4 3279
8c61282f
KM		 3280 bitmask[0] = FATTR4_WORD0_SUPPORTED_ATTRS |
3281 FATTR4_WORD0_FH_EXPIRE_TYPE |
3282 FATTR4_WORD0_LINK_SUPPORT |
3283 FATTR4_WORD0_SYMLINK_SUPPORT |
3284 FATTR4_WORD0_ACLSUPPORT;
3285 if (minorversion)
3286 bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3287
7c513058 3288 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3289 if (status == 0) {
b944dba3 3290 /* Sanity check the server answers */
8c61282f 3291 switch (minorversion) {
b944dba3
TM		 3292 case 0:
3293 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
3294 res.attr_bitmask[2] = 0;
3295 break;
3296 case 1:
3297 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
3298 break;
3299 case 2:
3300 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
3301 }
1da177e4 3302 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 3303 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
3304 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
3305 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
3306 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
b944dba3
TM		 3307 NFS_CAP_CTIME|NFS_CAP_MTIME|
3308 NFS_CAP_SECURITY_LABEL);
7dd7d959
MN		 3309 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
3310 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
1da177e4
LT		 3311 server->caps |= NFS_CAP_ACLS;
3312 if (res.has_links != 0)
3313 server->caps |= NFS_CAP_HARDLINKS;
3314 if (res.has_symlinks != 0)
3315 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 3316 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
3317 server->caps |= NFS_CAP_FILEID;
3318 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
3319 server->caps |= NFS_CAP_MODE;
3320 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
3321 server->caps |= NFS_CAP_NLINK;
3322 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
3323 server->caps |= NFS_CAP_OWNER;
3324 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
3325 server->caps |= NFS_CAP_OWNER_GROUP;
3326 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
3327 server->caps |= NFS_CAP_ATIME;
3328 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
3329 server->caps |= NFS_CAP_CTIME;
3330 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
3331 server->caps |= NFS_CAP_MTIME;
aa9c2669
DQ		 3332#ifdef CONFIG_NFS_V4_SECURITY_LABEL
3333 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
3334 server->caps |= NFS_CAP_SECURITY_LABEL;
3335#endif
3336 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
3337 sizeof(server->attr_bitmask));
b944dba3 3338 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
62ab460c 3339
a65318bf
TM		 3340 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
3341 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
3342 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
b944dba3 3343 server->cache_consistency_bitmask[2] = 0;
f4b23de3
TM		 3344
3345 /* Avoid a regression due to buggy server */
3346 for (i = 0; i < ARRAY_SIZE(res.exclcreat_bitmask); i++)
3347 res.exclcreat_bitmask[i] &= res.attr_bitmask[i];
8c61282f
KM		 3348 memcpy(server->exclcreat_bitmask, res.exclcreat_bitmask,
3349 sizeof(server->exclcreat_bitmask));
f4b23de3 3350
1da177e4 3351 server->acl_bitmask = res.acl_bitmask;
264e6351 3352 server->fh_expire_type = res.fh_expire_type;
1da177e4 3353 }
cccef3b9 3354
1da177e4
LT		 3355 return status;
3356}
3357
55a97593 3358int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 3359{
3360 struct nfs4_exception exception = { };
3361 int err;
3362 do {
3363 err = nfs4_handle_exception(server,
3364 _nfs4_server_capabilities(server, fhandle),
3365 &exception);
3366 } while (exception.retry);
3367 return err;
3368}
3369
3370static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3371 struct nfs_fsinfo *info)
3372{
aa9c2669 3373 u32 bitmask[3];
1da177e4 3374 struct nfs4_lookup_root_arg args = {
aa9c2669 3375 .bitmask = bitmask,
1da177e4
LT		 3376 };
3377 struct nfs4_lookup_res res = {
3378 .server = server,
0e574af1 3379 .fattr = info->fattr,
1da177e4
LT		 3380 .fh = fhandle,
3381 };
3382 struct rpc_message msg = {
3383 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
3384 .rpc_argp = &args,
3385 .rpc_resp = &res,
3386 };
008f55d0 3387
aa9c2669
DQ		 3388 bitmask[0] = nfs4_fattr_bitmap[0];
3389 bitmask[1] = nfs4_fattr_bitmap[1];
3390 /*
3391 * Process the label in the upcoming getfattr
3392 */
3393 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
3394
0e574af1 3395 nfs_fattr_init(info->fattr);
7c513058 3396 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3397}
3398
3399static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3400 struct nfs_fsinfo *info)
3401{
3402 struct nfs4_exception exception = { };
3403 int err;
3404 do {
fb8a5ba8 3405 err = _nfs4_lookup_root(server, fhandle, info);
b5f875a9 3406 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
fb8a5ba8
BS		 3407 switch (err) {
3408 case 0:
3409 case -NFS4ERR_WRONGSEC:
05e9cfb4 3410 goto out;
fb8a5ba8
BS		 3411 default:
3412 err = nfs4_handle_exception(server, err, &exception);
3413 }
1da177e4 3414 } while (exception.retry);
05e9cfb4 3415out:
1da177e4
LT		 3416 return err;
3417}
3418
8f70e95f
BS		 3419static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3420 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
3421{
c2190661
TM		 3422 struct rpc_auth_create_args auth_args = {
3423 .pseudoflavor = flavor,
3424 };
8f70e95f 3425 struct rpc_auth *auth;
8f70e95f 3426
c2190661 3427 auth = rpcauth_create(&auth_args, server->client);
9df1336c
AS		 3428 if (IS_ERR(auth))
3429 return -EACCES;
3430 return nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 3431}
3432
9a744ba3
CL		 3433/*
3434 * Retry pseudoroot lookup with various security flavors. We do this when:
3435 *
3436 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
3437 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
3438 *
3439 * Returns zero on success, or a negative NFS4ERR value, or a
3440 * negative errno value.
3441 */
801a16dc 3442static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 3443 struct nfs_fsinfo *info)
1da177e4 3444{
9a744ba3
CL		 3445 /* Per 3530bis 15.33.5 */
3446 static const rpc_authflavor_t flav_array[] = {
3447 RPC_AUTH_GSS_KRB5P,
3448 RPC_AUTH_GSS_KRB5I,
3449 RPC_AUTH_GSS_KRB5,
c4eafe11 3450 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 3451 RPC_AUTH_NULL,
3452 };
3453 int status = -EPERM;
3454 size_t i;
6a1a1e34 3455
4d4b69dd
WAA		 3456 if (server->auth_info.flavor_len > 0) {
3457 /* try each flavor specified by user */
3458 for (i = 0; i < server->auth_info.flavor_len; i++) {
3459 status = nfs4_lookup_root_sec(server, fhandle, info,
3460 server->auth_info.flavors[i]);
3461 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3462 continue;
3463 break;
3464 }
3465 } else {
3466 /* no flavors specified by user, try default list */
3467 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3468 status = nfs4_lookup_root_sec(server, fhandle, info,
3469 flav_array[i]);
3470 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3471 continue;
3472 break;
3473 }
8f70e95f 3474 }
9a744ba3 3475
fb8a5ba8
BS		 3476 /*
3477 * -EACCESS could mean that the user doesn't have correct permissions
3478 * to access the mount. It could also mean that we tried to mount
3479 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
3480 * existing mount programs don't handle -EACCES very well so it should
3481 * be mapped to -EPERM instead.
3482 */
3483 if (status == -EACCES)
3484 status = -EPERM;
801a16dc
BS		 3485 return status;
3486}
3487
2ed4b95b
CL		 3488/**
3489 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
3490 * @server: initialized nfs_server handle
3491 * @fhandle: we fill in the pseudo-fs root file handle
3492 * @info: we fill in an FSINFO struct
5e6b1990 3493 * @auth_probe: probe the auth flavours
2ed4b95b
CL		 3494 *
3495 * Returns zero on success, or a negative errno.
801a16dc 3496 */
3028eb2b 3497int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
5e6b1990
TM		 3498 struct nfs_fsinfo *info,
3499 bool auth_probe)
801a16dc 3500{
c7757074 3501 int status = 0;
2ed4b95b 3502
c7757074 3503 if (!auth_probe)
5e6b1990 3504 status = nfs4_lookup_root(server, fhandle, info);
c7757074
AP		 3505
3506 if (auth_probe || status == NFS4ERR_WRONGSEC)
698c937b
TM		 3507 status = server->nfs_client->cl_mvops->find_root_sec(server,
3508 fhandle, info);
2ed4b95b 3509
1da177e4
LT		 3510 if (status == 0)
3511 status = nfs4_server_capabilities(server, fhandle);
3512 if (status == 0)
3513 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 3514
c12e87f4 3515 return nfs4_map_errors(status);
1da177e4
LT		 3516}
3517
bae36241
BS		 3518static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3519 struct nfs_fsinfo *info)
3520{
3521 int error;
3522 struct nfs_fattr *fattr = info->fattr;
1775fd3e 3523 struct nfs4_label *label = NULL;
bae36241
BS		 3524
3525 error = nfs4_server_capabilities(server, mntfh);
3526 if (error < 0) {
3527 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3528 return error;
3529 }
3530
14c43f76
DQ		 3531 label = nfs4_label_alloc(server, GFP_KERNEL);
3532 if (IS_ERR(label))
3533 return PTR_ERR(label);
3534
1775fd3e 3535 error = nfs4_proc_getattr(server, mntfh, fattr, label);
bae36241
BS		 3536 if (error < 0) {
3537 dprintk("nfs4_get_root: getattr error = %d\n", -error);
14c43f76 3538 goto err_free_label;
bae36241
BS		 3539 }
3540
3541 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3542 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3543 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3544
14c43f76
DQ		 3545err_free_label:
3546 nfs4_label_free(label);
3547
bae36241
BS		 3548 return error;
3549}
3550
6b97fd3d
MN		 3551/*
3552 * Get locations and (maybe) other attributes of a referral.
3553 * Note that we'll actually follow the referral later when
3554 * we detect fsid mismatch in inode revalidation
3555 */
f05d147f
BS		 3556static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3557 const struct qstr *name, struct nfs_fattr *fattr,
3558 struct nfs_fh *fhandle)
6b97fd3d
MN		 3559{
3560 int status = -ENOMEM;
3561 struct page *page = NULL;
3562 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 3563
3564 page = alloc_page(GFP_KERNEL);
3565 if (page == NULL)
3566 goto out;
3567 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3568 if (locations == NULL)
3569 goto out;
3570
f05d147f 3571 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 3572 if (status != 0)
3573 goto out;
519ae255
CL		 3574
3575 /*
3576 * If the fsid didn't change, this is a migration event, not a
3577 * referral. Cause us to drop into the exception handler, which
3578 * will kick off migration recovery.
3579 */
6b97fd3d 3580 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 3581 dprintk("%s: server did not return a different fsid for"
3582 " a referral at %s\n", __func__, name->name);
519ae255 3583 status = -NFS4ERR_MOVED;
6b97fd3d
MN		 3584 goto out;
3585 }
533eb461
AA		 3586 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3587 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 3588
533eb461 3589 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 3590 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 3591 memset(fhandle, 0, sizeof(struct nfs_fh));
3592out:
3593 if (page)
3594 __free_page(page);
5d7ca35a 3595 kfree(locations);
6b97fd3d
MN		 3596 return status;
3597}
3598
1775fd3e
DQ		 3599static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3600 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3601{
3602 struct nfs4_getattr_arg args = {
3603 .fh = fhandle,
3604 .bitmask = server->attr_bitmask,
3605 };
3606 struct nfs4_getattr_res res = {
3607 .fattr = fattr,
1775fd3e 3608 .label = label,
1da177e4
LT		 3609 .server = server,
3610 };
3611 struct rpc_message msg = {
3612 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3613 .rpc_argp = &args,
3614 .rpc_resp = &res,
3615 };
aa9c2669
DQ		 3616
3617 args.bitmask = nfs4_bitmask(server, label);
3618
0e574af1 3619 nfs_fattr_init(fattr);
7c513058 3620 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3621}
3622
1775fd3e
DQ		 3623static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3624 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3625{
3626 struct nfs4_exception exception = { };
3627 int err;
3628 do {
b5f875a9
TM		 3629 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3630 trace_nfs4_getattr(server, fhandle, fattr, err);
3631 err = nfs4_handle_exception(server, err,
1da177e4
LT		 3632 &exception);
3633 } while (exception.retry);
3634 return err;
3635}
3636
3637/*
3638 * The file is not closed if it is opened due to the a request to change
3639 * the size of the file. The open call will not be needed once the
3640 * VFS layer lookup-intents are implemented.
3641 *
3642 * Close is called when the inode is destroyed.
3643 * If we haven't opened the file for O_WRONLY, we
3644 * need to in the size_change case to obtain a stateid.
3645 *
3646 * Got race?
3647 * Because OPEN is always done by name in nfsv4, it is
3648 * possible that we opened a different file by the same
3649 * name. We can recognize this race condition, but we
3650 * can't do anything about it besides returning an error.
3651 *
3652 * This will be fixed with VFS changes (lookup-intent).
3653 */
3654static int
3655nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3656 struct iattr *sattr)
3657{
2b0143b5 3658 struct inode *inode = d_inode(dentry);
659bfcd6 3659 struct rpc_cred *cred = NULL;
29b59f94 3660 struct nfs_open_context *ctx = NULL;
14c43f76 3661 struct nfs4_label *label = NULL;
1da177e4
LT		 3662 int status;
3663
88ac815c
PT		 3664 if (pnfs_ld_layoutret_on_setattr(inode) &&
3665 sattr->ia_valid & ATTR_SIZE &&
3666 sattr->ia_size < i_size_read(inode))
24028672 3667 pnfs_commit_and_return_layout(inode);
8a1636c4 3668
0e574af1 3669 nfs_fattr_init(fattr);
1da177e4 3670
2669940d
AA		 3671 /* Deal with open(O_TRUNC) */
3672 if (sattr->ia_valid & ATTR_OPEN)
cc7936f9 3673 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2669940d
AA		 3674
3675 /* Optimization: if the end result is no change, don't RPC */
cc7936f9 3676 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2669940d
AA		 3677 return 0;
3678
d530838b 3679 /* Search for an existing open(O_WRITE) file */
659bfcd6 3680 if (sattr->ia_valid & ATTR_FILE) {
659bfcd6
TM		 3681
3682 ctx = nfs_file_open_context(sattr->ia_file);
29b59f94 3683 if (ctx)
504e5189 3684 cred = ctx->cred;
659bfcd6 3685 }
08e9eac4 3686
14c43f76
DQ		 3687 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3688 if (IS_ERR(label))
3689 return PTR_ERR(label);
3690
29b59f94 3691 status = nfs4_do_setattr(inode, cred, fattr, sattr, ctx, NULL, label);
aa9c2669 3692 if (status == 0) {
f044636d 3693 nfs_setattr_update_inode(inode, sattr, fattr);
aa9c2669
DQ		 3694 nfs_setsecurity(inode, fattr, label);
3695 }
14c43f76 3696 nfs4_label_free(label);
1da177e4
LT		 3697 return status;
3698}
3699
0c2e53f1
TM		 3700static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3701 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3702 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 3703{
0c2e53f1 3704 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 3705 int status;
3706 struct nfs4_lookup_arg args = {
3707 .bitmask = server->attr_bitmask,
0c2e53f1 3708 .dir_fh = NFS_FH(dir),
2b3de441
DH		 3709 .name = name,
3710 };
3711 struct nfs4_lookup_res res = {
3712 .server = server,
3713 .fattr = fattr,
aa9c2669 3714 .label = label,
2b3de441
DH		 3715 .fh = fhandle,
3716 };
3717 struct rpc_message msg = {
3718 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3719 .rpc_argp = &args,
3720 .rpc_resp = &res,
3721 };
3722
aa9c2669
DQ		 3723 args.bitmask = nfs4_bitmask(server, label);
3724
2b3de441
DH		 3725 nfs_fattr_init(fattr);
3726
1da177e4 3727 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 3728 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3729 dprintk("NFS reply lookup: %d\n", status);
3730 return status;
3731}
3732
72de53ec 3733static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 3734{
7ebb9315 3735 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 3736 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 3737 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3738 fattr->nlink = 2;
3739}
3740
72de53ec 3741static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
beffb8fe 3742 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3743 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3744{
3745 struct nfs4_exception exception = { };
72de53ec 3746 struct rpc_clnt *client = *clnt;
1da177e4
LT		 3747 int err;
3748 do {
1775fd3e 3749 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
078ea3df 3750 trace_nfs4_lookup(dir, name, err);
72de53ec 3751 switch (err) {
08ef7bd3 3752 case -NFS4ERR_BADNAME:
72de53ec
BS		 3753 err = -ENOENT;
3754 goto out;
0c2e53f1 3755 case -NFS4ERR_MOVED:
f05d147f 3756 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
c86c90c6
DM		 3757 if (err == -NFS4ERR_MOVED)
3758 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
72de53ec 3759 goto out;
0c2e53f1 3760 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 3761 err = -EPERM;
3762 if (client != *clnt)
3763 goto out;
66b06860 3764 client = nfs4_negotiate_security(client, dir, name);
72de53ec
BS		 3765 if (IS_ERR(client))
3766 return PTR_ERR(client);
3767
3768 exception.retry = 1;
3769 break;
3770 default:
3771 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 3772 }
1da177e4 3773 } while (exception.retry);
72de53ec
BS		 3774
3775out:
3776 if (err == 0)
3777 *clnt = client;
3778 else if (client != *clnt)
3779 rpc_shutdown_client(client);
3780
1da177e4
LT		 3781 return err;
3782}
3783
beffb8fe 3784static int nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1775fd3e
DQ		 3785 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3786 struct nfs4_label *label)
72de53ec
BS		 3787{
3788 int status;
3789 struct rpc_clnt *client = NFS_CLIENT(dir);
3790
1775fd3e 3791 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
72de53ec
BS		 3792 if (client != NFS_CLIENT(dir)) {
3793 rpc_shutdown_client(client);
3794 nfs_fixup_secinfo_attributes(fattr);
3795 }
3796 return status;
3797}
3798
f05d147f 3799struct rpc_clnt *
beffb8fe 3800nfs4_proc_lookup_mountpoint(struct inode *dir, const struct qstr *name,
f05d147f
BS		 3801 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3802{
b72888cb 3803 struct rpc_clnt *client = NFS_CLIENT(dir);
f05d147f 3804 int status;
f05d147f 3805
1775fd3e 3806 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
b72888cb 3807 if (status < 0)
f05d147f 3808 return ERR_PTR(status);
b72888cb 3809 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
f05d147f
BS		 3810}
3811
5b5faaf6
JL		 3812static int _nfs4_proc_lookupp(struct inode *inode,
3813 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3814 struct nfs4_label *label)
3815{
3816 struct rpc_clnt *clnt = NFS_CLIENT(inode);
3817 struct nfs_server *server = NFS_SERVER(inode);
3818 int status;
3819 struct nfs4_lookupp_arg args = {
3820 .bitmask = server->attr_bitmask,
3821 .fh = NFS_FH(inode),
3822 };
3823 struct nfs4_lookupp_res res = {
3824 .server = server,
3825 .fattr = fattr,
3826 .label = label,
3827 .fh = fhandle,
3828 };
3829 struct rpc_message msg = {
3830 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUPP],
3831 .rpc_argp = &args,
3832 .rpc_resp = &res,
3833 };
3834
3835 args.bitmask = nfs4_bitmask(server, label);
3836
3837 nfs_fattr_init(fattr);
3838
3839 dprintk("NFS call lookupp ino=0x%lx\n", inode->i_ino);
3840 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
3841 &res.seq_res, 0);
3842 dprintk("NFS reply lookupp: %d\n", status);
3843 return status;
3844}
3845
3846static int nfs4_proc_lookupp(struct inode *inode, struct nfs_fh *fhandle,
3847 struct nfs_fattr *fattr, struct nfs4_label *label)
3848{
3849 struct nfs4_exception exception = { };
3850 int err;
3851 do {
3852 err = _nfs4_proc_lookupp(inode, fhandle, fattr, label);
3853 trace_nfs4_lookupp(inode, err);
3854 err = nfs4_handle_exception(NFS_SERVER(inode), err,
3855 &exception);
3856 } while (exception.retry);
3857 return err;
3858}
3859
1da177e4
LT		 3860static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3861{
76b32999 3862 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3863 struct nfs4_accessargs args = {
3864 .fh = NFS_FH(inode),
a4980e78 3865 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 3866 };
3867 struct nfs4_accessres res = {
3868 .server = server,
1da177e4 3869 };
1da177e4
LT		 3870 struct rpc_message msg = {
3871 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3872 .rpc_argp = &args,
3873 .rpc_resp = &res,
3874 .rpc_cred = entry->cred,
3875 };
3876 int mode = entry->mask;
aa9c2669 3877 int status = 0;
1da177e4
LT		 3878
3879 /*
3880 * Determine which access bits we want to ask for...
3881 */
3882 if (mode & MAY_READ)
3883 args.access |= NFS4_ACCESS_READ;
3884 if (S_ISDIR(inode->i_mode)) {
3885 if (mode & MAY_WRITE)
3886 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3887 if (mode & MAY_EXEC)
3888 args.access |= NFS4_ACCESS_LOOKUP;
3889 } else {
3890 if (mode & MAY_WRITE)
3891 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3892 if (mode & MAY_EXEC)
3893 args.access |= NFS4_ACCESS_EXECUTE;
3894 }
c407d41a
TM		 3895
3896 res.fattr = nfs_alloc_fattr();
3897 if (res.fattr == NULL)
3898 return -ENOMEM;
3899
7c513058 3900 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3901 if (!status) {
6168f62c 3902 nfs_access_set_mask(entry, res.access);
c407d41a 3903 nfs_refresh_inode(inode, res.fattr);
1da177e4 3904 }
c407d41a 3905 nfs_free_fattr(res.fattr);
1da177e4
LT		 3906 return status;
3907}
3908
3909static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3910{
3911 struct nfs4_exception exception = { };
3912 int err;
3913 do {
c1578b76
TM		 3914 err = _nfs4_proc_access(inode, entry);
3915 trace_nfs4_access(inode, err);
3916 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3917 &exception);
3918 } while (exception.retry);
3919 return err;
3920}
3921
3922/*
3923 * TODO: For the time being, we don't try to get any attributes
3924 * along with any of the zero-copy operations READ, READDIR,
3925 * READLINK, WRITE.
3926 *
3927 * In the case of the first three, we want to put the GETATTR
3928 * after the read-type operation -- this is because it is hard
3929 * to predict the length of a GETATTR response in v4, and thus
3930 * align the READ data correctly. This means that the GETATTR
3931 * may end up partially falling into the page cache, and we should
3932 * shift it into the 'tail' of the xdr_buf before processing.
3933 * To do this efficiently, we need to know the total length
3934 * of data received, which doesn't seem to be available outside
3935 * of the RPC layer.
3936 *
3937 * In the case of WRITE, we also want to put the GETATTR after
3938 * the operation -- in this case because we want to make sure
140150db 3939 * we get the post-operation mtime and size.
1da177e4
LT		 3940 *
3941 * Both of these changes to the XDR layer would in fact be quite
3942 * minor, but I decided to leave them for a subsequent patch.
3943 */
3944static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3945 unsigned int pgbase, unsigned int pglen)
3946{
3947 struct nfs4_readlink args = {
3948 .fh = NFS_FH(inode),
3949 .pgbase = pgbase,
3950 .pglen = pglen,
3951 .pages = &page,
3952 };
f50c7000 3953 struct nfs4_readlink_res res;
1da177e4
LT		 3954 struct rpc_message msg = {
3955 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3956 .rpc_argp = &args,
f50c7000 3957 .rpc_resp = &res,
1da177e4
LT		 3958 };
3959
7c513058 3960 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3961}
3962
3963static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3964 unsigned int pgbase, unsigned int pglen)
3965{
3966 struct nfs4_exception exception = { };
3967 int err;
3968 do {
c1578b76
TM		 3969 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3970 trace_nfs4_readlink(inode, err);
3971 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3972 &exception);
3973 } while (exception.retry);
3974 return err;
3975}
3976
1da177e4 3977/*
8867fe58 3978 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3979 */
1da177e4
LT		 3980static int
3981nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3982 int flags)
1da177e4 3983{
dff25ddb 3984 struct nfs_server *server = NFS_SERVER(dir);
aa9c2669 3985 struct nfs4_label l, *ilabel = NULL;
8867fe58 3986 struct nfs_open_context *ctx;
1da177e4 3987 struct nfs4_state *state;
1da177e4
LT		 3988 int status = 0;
3989
532d4def 3990 ctx = alloc_nfs_open_context(dentry, FMODE_READ, NULL);
8867fe58
MS		 3991 if (IS_ERR(ctx))
3992 return PTR_ERR(ctx);
3993
aa9c2669
DQ		 3994 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3995
dff25ddb
AG		 3996 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
3997 sattr->ia_mode &= ~current_umask();
c5c3fb5f 3998 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, NULL);
1da177e4
LT		 3999 if (IS_ERR(state)) {
4000 status = PTR_ERR(state);
c0204fd2 4001 goto out;
1da177e4 4002 }
1da177e4 4003out:
aa9c2669 4004 nfs4_label_release_security(ilabel);
8867fe58 4005 put_nfs_open_context(ctx);
1da177e4
LT		 4006 return status;
4007}
4008
beffb8fe 4009static int _nfs4_proc_remove(struct inode *dir, const struct qstr *name)
1da177e4 4010{
16e42959 4011 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 4012 struct nfs_removeargs args = {
1da177e4 4013 .fh = NFS_FH(dir),
26fe5750 4014 .name = *name,
16e42959 4015 };
4fdc17b2 4016 struct nfs_removeres res = {
16e42959 4017 .server = server,
1da177e4 4018 };
1da177e4 4019 struct rpc_message msg = {
4fdc17b2
TM		 4020 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
4021 .rpc_argp = &args,
4022 .rpc_resp = &res,
1da177e4 4023 };
d3129ef6 4024 unsigned long timestamp = jiffies;
778d2817 4025 int status;
1da177e4 4026
7c513058 4027 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 4028 if (status == 0)
d3129ef6 4029 update_changeattr(dir, &res.cinfo, timestamp);
1da177e4
LT		 4030 return status;
4031}
4032
beffb8fe 4033static int nfs4_proc_remove(struct inode *dir, const struct qstr *name)
1da177e4
LT		 4034{
4035 struct nfs4_exception exception = { };
4036 int err;
4037 do {
078ea3df
TM		 4038 err = _nfs4_proc_remove(dir, name);
4039 trace_nfs4_remove(dir, name, err);
4040 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4041 &exception);
4042 } while (exception.retry);
4043 return err;
4044}
4045
e4eff1a6 4046static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 4047{
e4eff1a6
TM		 4048 struct nfs_server *server = NFS_SERVER(dir);
4049 struct nfs_removeargs *args = msg->rpc_argp;
4050 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 4051
e4eff1a6 4052 res->server = server;
1da177e4 4053 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
a9c92d6b 4054 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
aa9c2669
DQ		 4055
4056 nfs_fattr_init(res->dir_attr);
1da177e4
LT		 4057}
4058
34e137cc
BS		 4059static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
4060{
42e1cca7 4061 nfs4_setup_sequence(NFS_SB(data->dentry->d_sb)->nfs_client,
d9afbd1b
TM		 4062 &data->args.seq_args,
4063 &data->res.seq_res,
4064 task);
1da177e4
LT		 4065}
4066
e4eff1a6 4067static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 4068{
078ea3df
TM		 4069 struct nfs_unlinkdata *data = task->tk_calldata;
4070 struct nfs_removeres *res = &data->res;
e4eff1a6 4071
14516c3a
TM		 4072 if (!nfs4_sequence_done(task, &res->seq_res))
4073 return 0;
8478eaa1
N		 4074 if (nfs4_async_handle_error(task, res->server, NULL,
4075 &data->timeout) == -EAGAIN)
e4eff1a6 4076 return 0;
c40d52fe 4077 if (task->tk_status == 0)
d3129ef6 4078 update_changeattr(dir, &res->cinfo, res->dir_attr->time_start);
e4eff1a6 4079 return 1;
1da177e4
LT		 4080}
4081
d3d4152a
JL		 4082static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
4083{
4084 struct nfs_server *server = NFS_SERVER(dir);
4085 struct nfs_renameargs *arg = msg->rpc_argp;
4086 struct nfs_renameres *res = msg->rpc_resp;
4087
4088 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 4089 res->server = server;
a9c92d6b 4090 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 4091}
4092
c6bfa1a1
BS		 4093static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
4094{
42e1cca7 4095 nfs4_setup_sequence(NFS_SERVER(data->old_dir)->nfs_client,
d9afbd1b
TM		 4096 &data->args.seq_args,
4097 &data->res.seq_res,
4098 task);
d3d4152a
JL		 4099}
4100
4101static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
4102 struct inode *new_dir)
4103{
fbc6f7c2
TM		 4104 struct nfs_renamedata *data = task->tk_calldata;
4105 struct nfs_renameres *res = &data->res;
d3d4152a
JL		 4106
4107 if (!nfs4_sequence_done(task, &res->seq_res))
4108 return 0;
8478eaa1 4109 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
d3d4152a
JL		 4110 return 0;
4111
c733c49c 4112 if (task->tk_status == 0) {
d3129ef6 4113 update_changeattr(old_dir, &res->old_cinfo, res->old_fattr->time_start);
c733c49c 4114 if (new_dir != old_dir)
d3129ef6 4115 update_changeattr(new_dir, &res->new_cinfo, res->new_fattr->time_start);
c733c49c 4116 }
d3d4152a
JL		 4117 return 1;
4118}
4119
beffb8fe 4120static int _nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name)
1da177e4 4121{
91ba2eee 4122 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 4123 struct nfs4_link_arg arg = {
4124 .fh = NFS_FH(inode),
4125 .dir_fh = NFS_FH(dir),
4126 .name = name,
91ba2eee
TM		 4127 .bitmask = server->attr_bitmask,
4128 };
91ba2eee
TM		 4129 struct nfs4_link_res res = {
4130 .server = server,
1775fd3e 4131 .label = NULL,
1da177e4 4132 };
1da177e4
LT		 4133 struct rpc_message msg = {
4134 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
4135 .rpc_argp = &arg,
91ba2eee 4136 .rpc_resp = &res,
1da177e4 4137 };
136f2627
TM		 4138 int status = -ENOMEM;
4139
4140 res.fattr = nfs_alloc_fattr();
778d2817 4141 if (res.fattr == NULL)
136f2627 4142 goto out;
1da177e4 4143
14c43f76
DQ		 4144 res.label = nfs4_label_alloc(server, GFP_KERNEL);
4145 if (IS_ERR(res.label)) {
4146 status = PTR_ERR(res.label);
4147 goto out;
4148 }
aa9c2669 4149 arg.bitmask = nfs4_bitmask(server, res.label);
14c43f76 4150
7c513058 4151 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee 4152 if (!status) {
d3129ef6 4153 update_changeattr(dir, &res.cinfo, res.fattr->time_start);
aa9c2669
DQ		 4154 status = nfs_post_op_update_inode(inode, res.fattr);
4155 if (!status)
4156 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 4157 }
14c43f76
DQ		 4158
4159
4160 nfs4_label_free(res.label);
4161
136f2627 4162out:
136f2627 4163 nfs_free_fattr(res.fattr);
1da177e4
LT		 4164 return status;
4165}
4166
beffb8fe 4167static int nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name)
1da177e4
LT		 4168{
4169 struct nfs4_exception exception = { };
4170 int err;
4171 do {
4172 err = nfs4_handle_exception(NFS_SERVER(inode),
4173 _nfs4_proc_link(inode, dir, name),
4174 &exception);
4175 } while (exception.retry);
4176 return err;
4177}
4178
57dc9a57
TM		 4179struct nfs4_createdata {
4180 struct rpc_message msg;
4181 struct nfs4_create_arg arg;
4182 struct nfs4_create_res res;
4183 struct nfs_fh fh;
4184 struct nfs_fattr fattr;
1775fd3e 4185 struct nfs4_label *label;
57dc9a57
TM		 4186};
4187
4188static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
beffb8fe 4189 const struct qstr *name, struct iattr *sattr, u32 ftype)
57dc9a57
TM		 4190{
4191 struct nfs4_createdata *data;
4192
4193 data = kzalloc(sizeof(*data), GFP_KERNEL);
4194 if (data != NULL) {
4195 struct nfs_server *server = NFS_SERVER(dir);
4196
14c43f76
DQ		 4197 data->label = nfs4_label_alloc(server, GFP_KERNEL);
4198 if (IS_ERR(data->label))
4199 goto out_free;
4200
57dc9a57
TM		 4201 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
4202 data->msg.rpc_argp = &data->arg;
4203 data->msg.rpc_resp = &data->res;
4204 data->arg.dir_fh = NFS_FH(dir);
4205 data->arg.server = server;
4206 data->arg.name = name;
4207 data->arg.attrs = sattr;
4208 data->arg.ftype = ftype;
aa9c2669 4209 data->arg.bitmask = nfs4_bitmask(server, data->label);
dff25ddb 4210 data->arg.umask = current_umask();
57dc9a57
TM		 4211 data->res.server = server;
4212 data->res.fh = &data->fh;
4213 data->res.fattr = &data->fattr;
1775fd3e 4214 data->res.label = data->label;
57dc9a57 4215 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 4216 }
4217 return data;
14c43f76
DQ		 4218out_free:
4219 kfree(data);
4220 return NULL;
57dc9a57
TM		 4221}
4222
4223static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
4224{
7c513058 4225 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 4226 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57 4227 if (status == 0) {
d3129ef6
TM		 4228 update_changeattr(dir, &data->res.dir_cinfo,
4229 data->res.fattr->time_start);
1775fd3e 4230 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 4231 }
4232 return status;
4233}
4234
4235static void nfs4_free_createdata(struct nfs4_createdata *data)
4236{
14c43f76 4237 nfs4_label_free(data->label);
57dc9a57
TM		 4238 kfree(data);
4239}
4240
4f390c15 4241static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 4242 struct page *page, unsigned int len, struct iattr *sattr,
4243 struct nfs4_label *label)
1da177e4 4244{
57dc9a57
TM		 4245 struct nfs4_createdata *data;
4246 int status = -ENAMETOOLONG;
1da177e4 4247
94a6d753 4248 if (len > NFS4_MAXPATHLEN)
57dc9a57 4249 goto out;
4f390c15 4250
57dc9a57
TM		 4251 status = -ENOMEM;
4252 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
4253 if (data == NULL)
4254 goto out;
4255
4256 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
4257 data->arg.u.symlink.pages = &page;
4258 data->arg.u.symlink.len = len;
1775fd3e 4259 data->arg.label = label;
1da177e4 4260
57dc9a57
TM		 4261 status = nfs4_do_create(dir, dentry, data);
4262
4263 nfs4_free_createdata(data);
4264out:
1da177e4
LT		 4265 return status;
4266}
4267
4f390c15 4268static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 4269 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 4270{
4271 struct nfs4_exception exception = { };
aa9c2669 4272 struct nfs4_label l, *label = NULL;
1da177e4 4273 int err;
aa9c2669
DQ		 4274
4275 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4276
1da177e4 4277 do {
078ea3df
TM		 4278 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
4279 trace_nfs4_symlink(dir, &dentry->d_name, err);
4280 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4281 &exception);
4282 } while (exception.retry);
aa9c2669
DQ		 4283
4284 nfs4_label_release_security(label);
1da177e4
LT		 4285 return err;
4286}
4287
4288static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 4289 struct iattr *sattr, struct nfs4_label *label)
1da177e4 4290{
57dc9a57
TM		 4291 struct nfs4_createdata *data;
4292 int status = -ENOMEM;
1da177e4 4293
57dc9a57
TM		 4294 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
4295 if (data == NULL)
4296 goto out;
4297
1775fd3e 4298 data->arg.label = label;
57dc9a57
TM		 4299 status = nfs4_do_create(dir, dentry, data);
4300
4301 nfs4_free_createdata(data);
4302out:
1da177e4
LT		 4303 return status;
4304}
4305
4306static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
4307 struct iattr *sattr)
4308{
dff25ddb 4309 struct nfs_server *server = NFS_SERVER(dir);
1da177e4 4310 struct nfs4_exception exception = { };
aa9c2669 4311 struct nfs4_label l, *label = NULL;
1da177e4 4312 int err;
a8a5da99 4313
aa9c2669
DQ		 4314 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4315
dff25ddb
AG		 4316 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
4317 sattr->ia_mode &= ~current_umask();
1da177e4 4318 do {
078ea3df
TM		 4319 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
4320 trace_nfs4_mkdir(dir, &dentry->d_name, err);
4321 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4322 &exception);
4323 } while (exception.retry);
aa9c2669
DQ		 4324 nfs4_label_release_security(label);
4325
1da177e4
LT		 4326 return err;
4327}
4328
4329static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
a7a3b1e9 4330 u64 cookie, struct page **pages, unsigned int count, bool plus)
1da177e4 4331{
2b0143b5 4332 struct inode *dir = d_inode(dentry);
1da177e4
LT		 4333 struct nfs4_readdir_arg args = {
4334 .fh = NFS_FH(dir),
56e4ebf8 4335 .pages = pages,
1da177e4
LT		 4336 .pgbase = 0,
4337 .count = count,
2b0143b5 4338 .bitmask = NFS_SERVER(d_inode(dentry))->attr_bitmask,
82f2e547 4339 .plus = plus,
1da177e4
LT		 4340 };
4341 struct nfs4_readdir_res res;
4342 struct rpc_message msg = {
4343 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
4344 .rpc_argp = &args,
4345 .rpc_resp = &res,
4346 .rpc_cred = cred,
4347 };
4348 int status;
4349
6de1472f
AV		 4350 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
4351 dentry,
eadf4598 4352 (unsigned long long)cookie);
c3f52af3 4353 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 4354 res.pgbase = args.pgbase;
7c513058 4355 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 4356 if (status >= 0) {
c3f52af3 4357 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 4358 status += args.pgbase;
4359 }
c4812998
TM		 4360
4361 nfs_invalidate_atime(dir);
4362
3110ff80 4363 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 4364 return status;
4365}
4366
4367static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
a7a3b1e9 4368 u64 cookie, struct page **pages, unsigned int count, bool plus)
1da177e4
LT		 4369{
4370 struct nfs4_exception exception = { };
4371 int err;
4372 do {
c1578b76
TM		 4373 err = _nfs4_proc_readdir(dentry, cred, cookie,
4374 pages, count, plus);
2b0143b5
DH		 4375 trace_nfs4_readdir(d_inode(dentry), err);
4376 err = nfs4_handle_exception(NFS_SERVER(d_inode(dentry)), err,
1da177e4
LT		 4377 &exception);
4378 } while (exception.retry);
4379 return err;
4380}
4381
4382static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 4383 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 4384{
57dc9a57
TM		 4385 struct nfs4_createdata *data;
4386 int mode = sattr->ia_mode;
4387 int status = -ENOMEM;
1da177e4 4388
57dc9a57
TM		 4389 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
4390 if (data == NULL)
4391 goto out;
4392
1da177e4 4393 if (S_ISFIFO(mode))
57dc9a57 4394 data->arg.ftype = NF4FIFO;
1da177e4 4395 else if (S_ISBLK(mode)) {
57dc9a57
TM		 4396 data->arg.ftype = NF4BLK;
4397 data->arg.u.device.specdata1 = MAJOR(rdev);
4398 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 4399 }
4400 else if (S_ISCHR(mode)) {
57dc9a57
TM		 4401 data->arg.ftype = NF4CHR;
4402 data->arg.u.device.specdata1 = MAJOR(rdev);
4403 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 4404 } else if (!S_ISSOCK(mode)) {
4405 status = -EINVAL;
4406 goto out_free;
1da177e4 4407 }
1775fd3e 4408
aa9c2669 4409 data->arg.label = label;
57dc9a57 4410 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 4411out_free:
57dc9a57
TM		 4412 nfs4_free_createdata(data);
4413out:
1da177e4
LT		 4414 return status;
4415}
4416
4417static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
4418 struct iattr *sattr, dev_t rdev)
4419{
dff25ddb 4420 struct nfs_server *server = NFS_SERVER(dir);
1da177e4 4421 struct nfs4_exception exception = { };
aa9c2669 4422 struct nfs4_label l, *label = NULL;
1da177e4 4423 int err;
a8a5da99 4424
aa9c2669
DQ		 4425 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4426
dff25ddb
AG		 4427 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
4428 sattr->ia_mode &= ~current_umask();
1da177e4 4429 do {
078ea3df
TM		 4430 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
4431 trace_nfs4_mknod(dir, &dentry->d_name, err);
4432 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4433 &exception);
4434 } while (exception.retry);
aa9c2669
DQ		 4435
4436 nfs4_label_release_security(label);
4437
1da177e4
LT		 4438 return err;
4439}
4440
4441static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
4442 struct nfs_fsstat *fsstat)
4443{
4444 struct nfs4_statfs_arg args = {
4445 .fh = fhandle,
4446 .bitmask = server->attr_bitmask,
4447 };
24ad148a
BH		 4448 struct nfs4_statfs_res res = {
4449 .fsstat = fsstat,
4450 };
1da177e4
LT		 4451 struct rpc_message msg = {
4452 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
4453 .rpc_argp = &args,
24ad148a 4454 .rpc_resp = &res,
1da177e4
LT		 4455 };
4456
0e574af1 4457 nfs_fattr_init(fsstat->fattr);
7c513058 4458 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4459}
4460
4461static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
4462{
4463 struct nfs4_exception exception = { };
4464 int err;
4465 do {
4466 err = nfs4_handle_exception(server,
4467 _nfs4_proc_statfs(server, fhandle, fsstat),
4468 &exception);
4469 } while (exception.retry);
4470 return err;
4471}
4472
4473static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
4474 struct nfs_fsinfo *fsinfo)
4475{
4476 struct nfs4_fsinfo_arg args = {
4477 .fh = fhandle,
4478 .bitmask = server->attr_bitmask,
4479 };
3dda5e43
BH		 4480 struct nfs4_fsinfo_res res = {
4481 .fsinfo = fsinfo,
4482 };
1da177e4
LT		 4483 struct rpc_message msg = {
4484 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
4485 .rpc_argp = &args,
3dda5e43 4486 .rpc_resp = &res,
1da177e4
LT		 4487 };
4488
7c513058 4489 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4490}
4491
4492static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4493{
4494 struct nfs4_exception exception = { };
83ca7f5a 4495 unsigned long now = jiffies;
1da177e4
LT		 4496 int err;
4497
4498 do {
83ca7f5a 4499 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
b5f875a9 4500 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
83ca7f5a 4501 if (err == 0) {
fb10fb67
TM		 4502 nfs4_set_lease_period(server->nfs_client,
4503 fsinfo->lease_time * HZ,
4504 now);
83ca7f5a
CL		 4505 break;
4506 }
4507 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 4508 } while (exception.retry);
4509 return err;
4510}
4511
4512static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4513{
e38eb650
BS		 4514 int error;
4515
0e574af1 4516 nfs_fattr_init(fsinfo->fattr);
e38eb650 4517 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 4518 if (error == 0) {
4519 /* block layout checks this! */
4520 server->pnfs_blksize = fsinfo->blksize;
ca440c38 4521 set_pnfs_layoutdriver(server, fhandle, fsinfo);
dc182549 4522 }
e38eb650
BS		 4523
4524 return error;
1da177e4
LT		 4525}
4526
4527static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4528 struct nfs_pathconf *pathconf)
4529{
4530 struct nfs4_pathconf_arg args = {
4531 .fh = fhandle,
4532 .bitmask = server->attr_bitmask,
4533 };
d45b2989
BH		 4534 struct nfs4_pathconf_res res = {
4535 .pathconf = pathconf,
4536 };
1da177e4
LT		 4537 struct rpc_message msg = {
4538 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
4539 .rpc_argp = &args,
d45b2989 4540 .rpc_resp = &res,
1da177e4
LT		 4541 };
4542
4543 /* None of the pathconf attributes are mandatory to implement */
4544 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
4545 memset(pathconf, 0, sizeof(*pathconf));
4546 return 0;
4547 }
4548
0e574af1 4549 nfs_fattr_init(pathconf->fattr);
7c513058 4550 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4551}
4552
4553static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4554 struct nfs_pathconf *pathconf)
4555{
4556 struct nfs4_exception exception = { };
4557 int err;
4558
4559 do {
4560 err = nfs4_handle_exception(server,
4561 _nfs4_proc_pathconf(server, fhandle, pathconf),
4562 &exception);
4563 } while (exception.retry);
4564 return err;
4565}
4566
5521abfd 4567int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 4568 const struct nfs_open_context *ctx,
4569 const struct nfs_lock_context *l_ctx,
4570 fmode_t fmode)
4571{
17393475 4572 return nfs4_select_rw_stateid(ctx->state, fmode, l_ctx, stateid, NULL);
9b206149
TM		 4573}
4574EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4575
5521abfd
TM		 4576static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4577 const struct nfs_open_context *ctx,
4578 const struct nfs_lock_context *l_ctx,
4579 fmode_t fmode)
4580{
4581 nfs4_stateid current_stateid;
4582
e1253be0
TM		 4583 /* If the current stateid represents a lost lock, then exit */
4584 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode) == -EIO)
4585 return true;
5521abfd
TM		 4586 return nfs4_stateid_match(stateid, &current_stateid);
4587}
4588
4589static bool nfs4_error_stateid_expired(int err)
4590{
4591 switch (err) {
4592 case -NFS4ERR_DELEG_REVOKED:
4593 case -NFS4ERR_ADMIN_REVOKED:
4594 case -NFS4ERR_BAD_STATEID:
4595 case -NFS4ERR_STALE_STATEID:
4596 case -NFS4ERR_OLD_STATEID:
4597 case -NFS4ERR_OPENMODE:
4598 case -NFS4ERR_EXPIRED:
4599 return true;
4600 }
4601 return false;
4602}
4603
d45f60c6 4604static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
1da177e4 4605{
d45f60c6 4606 struct nfs_server *server = NFS_SERVER(hdr->inode);
1da177e4 4607
d45f60c6 4608 trace_nfs4_read(hdr, task->tk_status);
9c27869d
TM		 4609 if (task->tk_status < 0) {
4610 struct nfs4_exception exception = {
4611 .inode = hdr->inode,
4612 .state = hdr->args.context->state,
4613 .stateid = &hdr->args.stateid,
4614 };
4615 task->tk_status = nfs4_async_handle_exception(task,
4616 server, task->tk_status, &exception);
4617 if (exception.retry) {
4618 rpc_restart_call_prepare(task);
4619 return -EAGAIN;
4620 }
1da177e4 4621 }
8850df99 4622
1da177e4 4623 if (task->tk_status > 0)
d45f60c6 4624 renew_lease(server, hdr->timestamp);
ec06c096 4625 return 0;
1da177e4
LT		 4626}
4627
5521abfd 4628static bool nfs4_read_stateid_changed(struct rpc_task *task,
3c6b899c 4629 struct nfs_pgio_args *args)
5521abfd
TM		 4630{
4631
4632 if (!nfs4_error_stateid_expired(task->tk_status) ||
4633 nfs4_stateid_is_current(&args->stateid,
4634 args->context,
4635 args->lock_context,
4636 FMODE_READ))
4637 return false;
4638 rpc_restart_call_prepare(task);
4639 return true;
4640}
4641
d45f60c6 4642static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
cbdabc7f
AA		 4643{
4644
4645 dprintk("--> %s\n", __func__);
4646
d45f60c6 4647 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
cbdabc7f 4648 return -EAGAIN;
d45f60c6 4649 if (nfs4_read_stateid_changed(task, &hdr->args))
5521abfd 4650 return -EAGAIN;
bfc505de
TM		 4651 if (task->tk_status > 0)
4652 nfs_invalidate_atime(hdr->inode);
d45f60c6
WAA		 4653 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4654 nfs4_read_done_cb(task, hdr);
cbdabc7f
AA		 4655}
4656
d45f60c6
WAA		 4657static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
4658 struct rpc_message *msg)
1da177e4 4659{
d45f60c6 4660 hdr->timestamp = jiffies;
ca857cc1
TM		 4661 if (!hdr->pgio_done_cb)
4662 hdr->pgio_done_cb = nfs4_read_done_cb;
bdc7f021 4663 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
d45f60c6 4664 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
1da177e4
LT		 4665}
4666
d45f60c6
WAA		 4667static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
4668 struct nfs_pgio_header *hdr)
ea7c3303 4669{
42e1cca7 4670 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode)->nfs_client,
d45f60c6
WAA		 4671 &hdr->args.seq_args,
4672 &hdr->res.seq_res,
9b206149 4673 task))
ef1820f9 4674 return 0;
d45f60c6
WAA		 4675 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
4676 hdr->args.lock_context,
fbe77c30 4677 hdr->rw_mode) == -EIO)
ef1820f9 4678 return -EIO;
d45f60c6 4679 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
ef1820f9
N		 4680 return -EIO;
4681 return 0;
1da177e4
LT		 4682}
4683
d45f60c6
WAA		 4684static int nfs4_write_done_cb(struct rpc_task *task,
4685 struct nfs_pgio_header *hdr)
1da177e4 4686{
d45f60c6 4687 struct inode *inode = hdr->inode;
8478eaa1 4688
d45f60c6 4689 trace_nfs4_write(hdr, task->tk_status);
9c27869d
TM		 4690 if (task->tk_status < 0) {
4691 struct nfs4_exception exception = {
4692 .inode = hdr->inode,
4693 .state = hdr->args.context->state,
4694 .stateid = &hdr->args.stateid,
4695 };
4696 task->tk_status = nfs4_async_handle_exception(task,
4697 NFS_SERVER(inode), task->tk_status,
4698 &exception);
4699 if (exception.retry) {
4700 rpc_restart_call_prepare(task);
4701 return -EAGAIN;
4702 }
1da177e4 4703 }
4f9838c7 4704 if (task->tk_status >= 0) {
d45f60c6 4705 renew_lease(NFS_SERVER(inode), hdr->timestamp);
a08a8cd3 4706 nfs_writeback_update_inode(hdr);
4f9838c7 4707 }
788e7a89 4708 return 0;
1da177e4
LT		 4709}
4710
5521abfd 4711static bool nfs4_write_stateid_changed(struct rpc_task *task,
3c6b899c 4712 struct nfs_pgio_args *args)
5521abfd
TM		 4713{
4714
4715 if (!nfs4_error_stateid_expired(task->tk_status) ||
4716 nfs4_stateid_is_current(&args->stateid,
4717 args->context,
4718 args->lock_context,
4719 FMODE_WRITE))
4720 return false;
4721 rpc_restart_call_prepare(task);
4722 return true;
4723}
4724
d45f60c6 4725static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
b029bc9b 4726{
d45f60c6 4727 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
b029bc9b 4728 return -EAGAIN;
d45f60c6 4729 if (nfs4_write_stateid_changed(task, &hdr->args))
5521abfd 4730 return -EAGAIN;
d45f60c6
WAA		 4731 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4732 nfs4_write_done_cb(task, hdr);
b029bc9b
FI		 4733}
4734
5a37f851 4735static
d45f60c6 4736bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
a69aef14 4737{
5a37f851 4738 /* Don't request attributes for pNFS or O_DIRECT writes */
d45f60c6 4739 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
5a37f851
TM		 4740 return false;
4741 /* Otherwise, request attributes if and only if we don't hold
4742 * a delegation
4743 */
011e2a7f 4744 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 4745}
a69aef14 4746
d45f60c6
WAA		 4747static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
4748 struct rpc_message *msg)
1da177e4 4749{
d45f60c6 4750 struct nfs_server *server = NFS_SERVER(hdr->inode);
bdc7f021 4751
d45f60c6
WAA		 4752 if (!nfs4_write_need_cache_consistency_data(hdr)) {
4753 hdr->args.bitmask = NULL;
4754 hdr->res.fattr = NULL;
7ffd1064 4755 } else
d45f60c6 4756 hdr->args.bitmask = server->cache_consistency_bitmask;
5a37f851 4757
d45f60c6
WAA		 4758 if (!hdr->pgio_done_cb)
4759 hdr->pgio_done_cb = nfs4_write_done_cb;
4760 hdr->res.server = server;
4761 hdr->timestamp = jiffies;
1da177e4 4762
bdc7f021 4763 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
d45f60c6 4764 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
1da177e4
LT		 4765}
4766
0b7c0153 4767static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 4768{
42e1cca7 4769 nfs4_setup_sequence(NFS_SERVER(data->inode)->nfs_client,
d9afbd1b
TM		 4770 &data->args.seq_args,
4771 &data->res.seq_res,
4772 task);
1da177e4
LT		 4773}
4774
0b7c0153 4775static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 4776{
1da177e4 4777 struct inode *inode = data->inode;
14516c3a 4778
cc668ab3 4779 trace_nfs4_commit(data, task->tk_status);
8478eaa1
N		 4780 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4781 NULL, NULL) == -EAGAIN) {
d00c5d43 4782 rpc_restart_call_prepare(task);
788e7a89 4783 return -EAGAIN;
1da177e4 4784 }
788e7a89 4785 return 0;
1da177e4
LT		 4786}
4787
0b7c0153 4788static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 4789{
4790 if (!nfs4_sequence_done(task, &data->res.seq_res))
4791 return -EAGAIN;
0b7c0153 4792 return data->commit_done_cb(task, data);
5f452431
FI		 4793}
4794
0b7c0153 4795static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 4796{
788e7a89 4797 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 4798
0b7c0153
FI		 4799 if (data->commit_done_cb == NULL)
4800 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 4801 data->res.server = server;
bdc7f021 4802 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
a9c92d6b 4803 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4804}
4805
9bc4e3ca
CL		 4806struct nfs4_renewdata {
4807 struct nfs_client *client;
4808 unsigned long timestamp;
4809};
4810
1da177e4
LT		 4811/*
4812 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4813 * standalone procedure for queueing an asynchronous RENEW.
4814 */
9bc4e3ca 4815static void nfs4_renew_release(void *calldata)
dc96aef9 4816{
9bc4e3ca
CL		 4817 struct nfs4_renewdata *data = calldata;
4818 struct nfs_client *clp = data->client;
dc96aef9 4819
0851de06
AB		 4820 if (atomic_read(&clp->cl_count) > 1)
4821 nfs4_schedule_state_renewal(clp);
4822 nfs_put_client(clp);
9bc4e3ca 4823 kfree(data);
dc96aef9
AB		 4824}
4825
9bc4e3ca 4826static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 4827{
9bc4e3ca
CL		 4828 struct nfs4_renewdata *data = calldata;
4829 struct nfs_client *clp = data->client;
4830 unsigned long timestamp = data->timestamp;
1da177e4 4831
c6d01c6f 4832 trace_nfs4_renew_async(clp, task->tk_status);
f8aba1e8
CL		 4833 switch (task->tk_status) {
4834 case 0:
4835 break;
4836 case -NFS4ERR_LEASE_MOVED:
4837 nfs4_schedule_lease_moved_recovery(clp);
4838 break;
4839 default:
95baa25c 4840 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 4841 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4842 return;
4843 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 4844 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 4845 return;
4846 }
4847 nfs4_schedule_path_down_recovery(clp);
1da177e4 4848 }
452e9352 4849 do_renew_lease(clp, timestamp);
1da177e4
LT		 4850}
4851
963d8fe5
TM		 4852static const struct rpc_call_ops nfs4_renew_ops = {
4853 .rpc_call_done = nfs4_renew_done,
dc96aef9 4854 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 4855};
4856
2f60ea6b 4857static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 4858{
4859 struct rpc_message msg = {
4860 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4861 .rpc_argp = clp,
b4454fe1 4862 .rpc_cred = cred,
1da177e4 4863 };
9bc4e3ca 4864 struct nfs4_renewdata *data;
1da177e4 4865
2f60ea6b
TM		 4866 if (renew_flags == 0)
4867 return 0;
0851de06
AB		 4868 if (!atomic_inc_not_zero(&clp->cl_count))
4869 return -EIO;
b569ad34 4870 data = kmalloc(sizeof(*data), GFP_NOFS);
5c737cb2
DW		 4871 if (data == NULL) {
4872 nfs_put_client(clp);
9bc4e3ca 4873 return -ENOMEM;
5c737cb2 4874 }
9bc4e3ca
CL		 4875 data->client = clp;
4876 data->timestamp = jiffies;
bc7a05ca 4877 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 4878 &nfs4_renew_ops, data);
1da177e4
LT		 4879}
4880
8534d4ec 4881static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 4882{
4883 struct rpc_message msg = {
4884 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4885 .rpc_argp = clp,
b4454fe1 4886 .rpc_cred = cred,
1da177e4
LT		 4887 };
4888 unsigned long now = jiffies;
4889 int status;
4890
bc7a05ca 4891 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4892 if (status < 0)
4893 return status;
452e9352 4894 do_renew_lease(clp, now);
1da177e4
LT		 4895 return 0;
4896}
4897
aa1870af
BF		 4898static inline int nfs4_server_supports_acls(struct nfs_server *server)
4899{
7dd7d959 4900 return server->caps & NFS_CAP_ACLS;
aa1870af
BF		 4901}
4902
21f498c2
TM		 4903/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4904 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 4905 * the stack.
4906 */
21f498c2 4907#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 4908
e9e3d724 4909static int buf_to_pages_noslab(const void *buf, size_t buflen,
8fbcf237 4910 struct page **pages)
e9e3d724
NH		 4911{
4912 struct page *newpage, **spages;
4913 int rc = 0;
4914 size_t len;
4915 spages = pages;
4916
4917 do {
21f498c2 4918 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 4919 newpage = alloc_page(GFP_KERNEL);
4920
4921 if (newpage == NULL)
4922 goto unwind;
4923 memcpy(page_address(newpage), buf, len);
d9b67e1e
AS		 4924 buf += len;
4925 buflen -= len;
e9e3d724
NH		 4926 *pages++ = newpage;
4927 rc++;
4928 } while (buflen != 0);
4929
4930 return rc;
4931
4932unwind:
4933 for(; rc > 0; rc--)
4934 __free_page(spages[rc-1]);
4935 return -ENOMEM;
4936}
4937
e50a1c2e
BF		 4938struct nfs4_cached_acl {
4939 int cached;
4940 size_t len;
3e9d4154 4941 char data[0];
e50a1c2e
BF		 4942};
4943
4944static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4945{
4946 struct nfs_inode *nfsi = NFS_I(inode);
4947
4948 spin_lock(&inode->i_lock);
4949 kfree(nfsi->nfs4_acl);
4950 nfsi->nfs4_acl = acl;
4951 spin_unlock(&inode->i_lock);
4952}
4953
4954static void nfs4_zap_acl_attr(struct inode *inode)
4955{
4956 nfs4_set_cached_acl(inode, NULL);
4957}
4958
4959static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4960{
4961 struct nfs_inode *nfsi = NFS_I(inode);
4962 struct nfs4_cached_acl *acl;
4963 int ret = -ENOENT;
4964
4965 spin_lock(&inode->i_lock);
4966 acl = nfsi->nfs4_acl;
4967 if (acl == NULL)
4968 goto out;
4969 if (buf == NULL) /* user is just asking for length */
4970 goto out_len;
4971 if (acl->cached == 0)
4972 goto out;
4973 ret = -ERANGE; /* see getxattr(2) man page */
4974 if (acl->len > buflen)
4975 goto out;
4976 memcpy(buf, acl->data, acl->len);
4977out_len:
4978 ret = acl->len;
4979out:
4980 spin_unlock(&inode->i_lock);
4981 return ret;
4982}
4983
5794d21e 4984static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 4985{
4986 struct nfs4_cached_acl *acl;
b291f1b1 4987 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 4988
1f1ea6c2 4989 if (buflen <= PAGE_SIZE) {
b291f1b1 4990 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 4991 if (acl == NULL)
4992 goto out;
4993 acl->cached = 1;
5794d21e 4994 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 4995 } else {
4996 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4997 if (acl == NULL)
4998 goto out;
4999 acl->cached = 0;
5000 }
5001 acl->len = acl_len;
5002out:
5003 nfs4_set_cached_acl(inode, acl);
5004}
5005
bf118a34
AA		 5006/*
5007 * The getxattr API returns the required buffer length when called with a
5008 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
5009 * the required buf. On a NULL buf, we send a page of data to the server
5010 * guessing that the ACL request can be serviced by a page. If so, we cache
5011 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
5012 * the cache. If not so, we throw away the page, and cache the required
5013 * length. The next getxattr call will then produce another round trip to
5014 * the server, this time with the input buf of the required size.
5015 */
16b4289c 5016static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 5017{
ed92d8c1 5018 struct page *pages[NFS4ACL_MAXPAGES + 1] = {NULL, };
aa1870af
BF		 5019 struct nfs_getaclargs args = {
5020 .fh = NFS_FH(inode),
5021 .acl_pages = pages,
5022 .acl_len = buflen,
5023 };
663c79b3
BH		 5024 struct nfs_getaclres res = {
5025 .acl_len = buflen,
5026 };
aa1870af
BF		 5027 struct rpc_message msg = {
5028 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
5029 .rpc_argp = &args,
663c79b3 5030 .rpc_resp = &res,
aa1870af 5031 };
ed92d8c1 5032 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE) + 1;
21f498c2 5033 int ret = -ENOMEM, i;
aa1870af 5034
21f498c2
TM		 5035 if (npages > ARRAY_SIZE(pages))
5036 return -ERANGE;
5a006899 5037
bf118a34
AA		 5038 for (i = 0; i < npages; i++) {
5039 pages[i] = alloc_page(GFP_KERNEL);
5040 if (!pages[i])
5041 goto out_free;
e50a1c2e 5042 }
5a006899
SP		 5043
5044 /* for decoding across pages */
5045 res.acl_scratch = alloc_page(GFP_KERNEL);
5046 if (!res.acl_scratch)
5047 goto out_free;
5048
bf118a34 5049 args.acl_len = npages * PAGE_SIZE;
5a006899 5050
de040bec 5051 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 5052 __func__, buf, buflen, npages, args.acl_len);
5053 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
5054 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 5055 if (ret)
5056 goto out_free;
bf118a34 5057
1f1ea6c2
TM		 5058 /* Handle the case where the passed-in buffer is too short */
5059 if (res.acl_flags & NFS4_ACL_TRUNC) {
5060 /* Did the user only issue a request for the acl length? */
5061 if (buf == NULL)
5062 goto out_ok;
e50a1c2e 5063 ret = -ERANGE;
1f1ea6c2 5064 goto out_free;
e50a1c2e 5065 }
1f1ea6c2 5066 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 5067 if (buf) {
5068 if (res.acl_len > buflen) {
5069 ret = -ERANGE;
5070 goto out_free;
5071 }
1f1ea6c2 5072 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 5073 }
1f1ea6c2
TM		 5074out_ok:
5075 ret = res.acl_len;
e50a1c2e 5076out_free:
bf118a34
AA		 5077 for (i = 0; i < npages; i++)
5078 if (pages[i])
5079 __free_page(pages[i]);
331818f1
TM		 5080 if (res.acl_scratch)
5081 __free_page(res.acl_scratch);
aa1870af
BF		 5082 return ret;
5083}
5084
16b4289c
TM		 5085static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
5086{
5087 struct nfs4_exception exception = { };
5088 ssize_t ret;
5089 do {
5090 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
c1578b76 5091 trace_nfs4_get_acl(inode, ret);
16b4289c
TM		 5092 if (ret >= 0)
5093 break;
5094 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
5095 } while (exception.retry);
5096 return ret;
5097}
5098
e50a1c2e
BF		 5099static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
5100{
5101 struct nfs_server *server = NFS_SERVER(inode);
5102 int ret;
5103
5104 if (!nfs4_server_supports_acls(server))
5105 return -EOPNOTSUPP;
5106 ret = nfs_revalidate_inode(server, inode);
5107 if (ret < 0)
5108 return ret;
08a22b39
AK		 5109 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
5110 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 5111 ret = nfs4_read_cached_acl(inode, buf, buflen);
5112 if (ret != -ENOENT)
bf118a34
AA		 5113 /* -ENOENT is returned if there is no ACL or if there is an ACL
5114 * but no cached acl data, just the acl length */
e50a1c2e
BF		 5115 return ret;
5116 return nfs4_get_acl_uncached(inode, buf, buflen);
5117}
5118
16b4289c 5119static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 5120{
5121 struct nfs_server *server = NFS_SERVER(inode);
5122 struct page *pages[NFS4ACL_MAXPAGES];
5123 struct nfs_setaclargs arg = {
5124 .fh = NFS_FH(inode),
5125 .acl_pages = pages,
5126 .acl_len = buflen,
5127 };
73c403a9 5128 struct nfs_setaclres res;
4b580ee3
BF		 5129 struct rpc_message msg = {
5130 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
5131 .rpc_argp = &arg,
73c403a9 5132 .rpc_resp = &res,
4b580ee3 5133 };
21f498c2 5134 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 5135 int ret, i;
4b580ee3
BF		 5136
5137 if (!nfs4_server_supports_acls(server))
5138 return -EOPNOTSUPP;
21f498c2
TM		 5139 if (npages > ARRAY_SIZE(pages))
5140 return -ERANGE;
8fbcf237 5141 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages);
e9e3d724
NH		 5142 if (i < 0)
5143 return i;
57ec14c5 5144 nfs4_inode_return_delegation(inode);
7c513058 5145 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 5146
5147 /*
5148 * Free each page after tx, so the only ref left is
5149 * held by the network stack
5150 */
5151 for (; i > 0; i--)
5152 put_page(pages[i-1]);
5153
08a22b39
AK		 5154 /*
5155 * Acl update can result in inode attribute update.
5156 * so mark the attribute cache invalid.
5157 */
5158 spin_lock(&inode->i_lock);
5159 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
5160 spin_unlock(&inode->i_lock);
f41f7418
TM		 5161 nfs_access_zap_cache(inode);
5162 nfs_zap_acl_cache(inode);
4b580ee3
BF		 5163 return ret;
5164}
5165
16b4289c
TM		 5166static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
5167{
5168 struct nfs4_exception exception = { };
5169 int err;
5170 do {
c1578b76
TM		 5171 err = __nfs4_proc_set_acl(inode, buf, buflen);
5172 trace_nfs4_set_acl(inode, err);
5173 err = nfs4_handle_exception(NFS_SERVER(inode), err,
16b4289c
TM		 5174 &exception);
5175 } while (exception.retry);
5176 return err;
5177}
5178
aa9c2669
DQ		 5179#ifdef CONFIG_NFS_V4_SECURITY_LABEL
5180static int _nfs4_get_security_label(struct inode *inode, void *buf,
5181 size_t buflen)
5182{
5183 struct nfs_server *server = NFS_SERVER(inode);
5184 struct nfs_fattr fattr;
5185 struct nfs4_label label = {0, 0, buflen, buf};
5186
5187 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
fcb63a9b 5188 struct nfs4_getattr_arg arg = {
aa9c2669
DQ		 5189 .fh = NFS_FH(inode),
5190 .bitmask = bitmask,
5191 };
5192 struct nfs4_getattr_res res = {
5193 .fattr = &fattr,
5194 .label = &label,
5195 .server = server,
5196 };
5197 struct rpc_message msg = {
5198 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
fcb63a9b 5199 .rpc_argp = &arg,
aa9c2669
DQ		 5200 .rpc_resp = &res,
5201 };
5202 int ret;
5203
5204 nfs_fattr_init(&fattr);
5205
fcb63a9b 5206 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
aa9c2669
DQ		 5207 if (ret)
5208 return ret;
5209 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
5210 return -ENOENT;
5211 if (buflen < label.len)
5212 return -ERANGE;
5213 return 0;
5214}
5215
5216static int nfs4_get_security_label(struct inode *inode, void *buf,
5217 size_t buflen)
5218{
5219 struct nfs4_exception exception = { };
5220 int err;
5221
5222 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
5223 return -EOPNOTSUPP;
5224
5225 do {
c1578b76
TM		 5226 err = _nfs4_get_security_label(inode, buf, buflen);
5227 trace_nfs4_get_security_label(inode, err);
5228 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 5229 &exception);
5230 } while (exception.retry);
5231 return err;
5232}
5233
5234static int _nfs4_do_set_security_label(struct inode *inode,
5235 struct nfs4_label *ilabel,
5236 struct nfs_fattr *fattr,
5237 struct nfs4_label *olabel)
5238{
5239
5240 struct iattr sattr = {0};
5241 struct nfs_server *server = NFS_SERVER(inode);
5242 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
12207f69 5243 struct nfs_setattrargs arg = {
d9b67e1e
AS		 5244 .fh = NFS_FH(inode),
5245 .iap = &sattr,
aa9c2669
DQ		 5246 .server = server,
5247 .bitmask = bitmask,
5248 .label = ilabel,
5249 };
5250 struct nfs_setattrres res = {
5251 .fattr = fattr,
5252 .label = olabel,
5253 .server = server,
5254 };
5255 struct rpc_message msg = {
d9b67e1e
AS		 5256 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
5257 .rpc_argp = &arg,
5258 .rpc_resp = &res,
aa9c2669
DQ		 5259 };
5260 int status;
5261
12207f69 5262 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
aa9c2669 5263
12207f69 5264 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
aa9c2669
DQ		 5265 if (status)
5266 dprintk("%s failed: %d\n", __func__, status);
5267
5268 return status;
5269}
5270
5271static int nfs4_do_set_security_label(struct inode *inode,
5272 struct nfs4_label *ilabel,
5273 struct nfs_fattr *fattr,
5274 struct nfs4_label *olabel)
5275{
5276 struct nfs4_exception exception = { };
5277 int err;
5278
5279 do {
c1578b76
TM		 5280 err = _nfs4_do_set_security_label(inode, ilabel,
5281 fattr, olabel);
5282 trace_nfs4_set_security_label(inode, err);
5283 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 5284 &exception);
5285 } while (exception.retry);
5286 return err;
5287}
5288
5289static int
59301226 5290nfs4_set_security_label(struct inode *inode, const void *buf, size_t buflen)
aa9c2669
DQ		 5291{
5292 struct nfs4_label ilabel, *olabel = NULL;
5293 struct nfs_fattr fattr;
5294 struct rpc_cred *cred;
aa9c2669
DQ		 5295 int status;
5296
5297 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
5298 return -EOPNOTSUPP;
5299
5300 nfs_fattr_init(&fattr);
5301
5302 ilabel.pi = 0;
5303 ilabel.lfs = 0;
5304 ilabel.label = (char *)buf;
5305 ilabel.len = buflen;
5306
5307 cred = rpc_lookup_cred();
5308 if (IS_ERR(cred))
5309 return PTR_ERR(cred);
5310
5311 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
5312 if (IS_ERR(olabel)) {
5313 status = -PTR_ERR(olabel);
5314 goto out;
5315 }
5316
5317 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
5318 if (status == 0)
5319 nfs_setsecurity(inode, &fattr, olabel);
5320
5321 nfs4_label_free(olabel);
5322out:
5323 put_rpccred(cred);
5324 return status;
5325}
5326#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
5327
5328
f092075d
CL		 5329static void nfs4_init_boot_verifier(const struct nfs_client *clp,
5330 nfs4_verifier *bootverf)
cd93710e
CL		 5331{
5332 __be32 verf[2];
5333
2c820d9a
CL		 5334 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
5335 /* An impossible timestamp guarantees this value
5336 * will never match a generated boot time. */
2f86e091
DD		 5337 verf[0] = cpu_to_be32(U32_MAX);
5338 verf[1] = cpu_to_be32(U32_MAX);
2c820d9a 5339 } else {
f092075d 5340 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
2f86e091
DD		 5341 u64 ns = ktime_to_ns(nn->boot_time);
5342
5343 verf[0] = cpu_to_be32(ns >> 32);
5344 verf[1] = cpu_to_be32(ns);
2c820d9a 5345 }
cd93710e
CL		 5346 memcpy(bootverf->data, verf, sizeof(bootverf->data));
5347}
5348
a3192688
JL		 5349static int
5350nfs4_init_nonuniform_client_string(struct nfs_client *clp)
e984a55a 5351{
a3192688
JL		 5352 size_t len;
5353 char *str;
e984a55a 5354
ceb3a16c 5355 if (clp->cl_owner_id != NULL)
a3192688 5356 return 0;
4a3e5779 5357
a3192688 5358 rcu_read_lock();
4a70316c 5359 len = 14 + strlen(clp->cl_ipaddr) + 1 +
a3192688
JL		 5360 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) +
5361 1 +
5362 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO)) +
5363 1;
5364 rcu_read_unlock();
5365
5366 if (len > NFS4_OPAQUE_LIMIT + 1)
5367 return -EINVAL;
5368
5369 /*
5370 * Since this string is allocated at mount time, and held until the
5371 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5372 * about a memory-reclaim deadlock.
5373 */
5374 str = kmalloc(len, GFP_KERNEL);
5375 if (!str)
5376 return -ENOMEM;
ceb3a16c 5377
e984a55a 5378 rcu_read_lock();
f2dd436e 5379 scnprintf(str, len, "Linux NFSv4.0 %s/%s %s",
a3192688
JL		 5380 clp->cl_ipaddr,
5381 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR),
5382 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO));
e984a55a 5383 rcu_read_unlock();
a3192688 5384
a3192688
JL		 5385 clp->cl_owner_id = str;
5386 return 0;
e984a55a
CL		 5387}
5388
873e3851
JL		 5389static int
5390nfs4_init_uniquifier_client_string(struct nfs_client *clp)
5391{
873e3851
JL		 5392 size_t len;
5393 char *str;
5394
5395 len = 10 + 10 + 1 + 10 + 1 +
5396 strlen(nfs4_client_id_uniquifier) + 1 +
5397 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5398
5399 if (len > NFS4_OPAQUE_LIMIT + 1)
5400 return -EINVAL;
5401
5402 /*
5403 * Since this string is allocated at mount time, and held until the
5404 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5405 * about a memory-reclaim deadlock.
5406 */
5407 str = kmalloc(len, GFP_KERNEL);
5408 if (!str)
5409 return -ENOMEM;
5410
f2dd436e 5411 scnprintf(str, len, "Linux NFSv%u.%u %s/%s",
873e3851
JL		 5412 clp->rpc_ops->version, clp->cl_minorversion,
5413 nfs4_client_id_uniquifier,
5414 clp->cl_rpcclient->cl_nodename);
873e3851
JL		 5415 clp->cl_owner_id = str;
5416 return 0;
5417}
5418
5419static int
5420nfs4_init_uniform_client_string(struct nfs_client *clp)
e984a55a 5421{
873e3851
JL		 5422 size_t len;
5423 char *str;
ceb3a16c
TM		 5424
5425 if (clp->cl_owner_id != NULL)
873e3851 5426 return 0;
6f2ea7f2
CL		 5427
5428 if (nfs4_client_id_uniquifier[0] != '\0')
873e3851
JL		 5429 return nfs4_init_uniquifier_client_string(clp);
5430
5431 len = 10 + 10 + 1 + 10 + 1 +
5432 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5433
5434 if (len > NFS4_OPAQUE_LIMIT + 1)
5435 return -EINVAL;
5436
5437 /*
5438 * Since this string is allocated at mount time, and held until the
5439 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5440 * about a memory-reclaim deadlock.
5441 */
5442 str = kmalloc(len, GFP_KERNEL);
5443 if (!str)
5444 return -ENOMEM;
5445
f2dd436e 5446 scnprintf(str, len, "Linux NFSv%u.%u %s",
873e3851
JL		 5447 clp->rpc_ops->version, clp->cl_minorversion,
5448 clp->cl_rpcclient->cl_nodename);
873e3851
JL		 5449 clp->cl_owner_id = str;
5450 return 0;
e984a55a
CL		 5451}
5452
706cb8db
CL		 5453/*
5454 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
5455 * services. Advertise one based on the address family of the
5456 * clientaddr.
5457 */
5458static unsigned int
5459nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
5460{
5461 if (strchr(clp->cl_ipaddr, ':') != NULL)
5462 return scnprintf(buf, len, "tcp6");
5463 else
5464 return scnprintf(buf, len, "tcp");
5465}
5466
f11b2a1c
JL		 5467static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
5468{
5469 struct nfs4_setclientid *sc = calldata;
5470
5471 if (task->tk_status == 0)
5472 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
5473}
5474
5475static const struct rpc_call_ops nfs4_setclientid_ops = {
5476 .rpc_call_done = nfs4_setclientid_done,
5477};
5478
6bbb4ae8
CL		 5479/**
5480 * nfs4_proc_setclientid - Negotiate client ID
5481 * @clp: state data structure
5482 * @program: RPC program for NFSv4 callback service
5483 * @port: IP port number for NFS4 callback service
5484 * @cred: RPC credential to use for this call
5485 * @res: where to place the result
5486 *
5487 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5488 */
bb8b27e5
TM		 5489int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
5490 unsigned short port, struct rpc_cred *cred,
5491 struct nfs4_setclientid_res *res)
1da177e4
LT		 5492{
5493 nfs4_verifier sc_verifier;
5494 struct nfs4_setclientid setclientid = {
5495 .sc_verifier = &sc_verifier,
5496 .sc_prog = program,
3a6bb738 5497 .sc_clnt = clp,
1da177e4
LT		 5498 };
5499 struct rpc_message msg = {
5500 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
5501 .rpc_argp = &setclientid,
bb8b27e5 5502 .rpc_resp = res,
286d7d6a 5503 .rpc_cred = cred,
1da177e4 5504 };
f11b2a1c
JL		 5505 struct rpc_task *task;
5506 struct rpc_task_setup task_setup_data = {
5507 .rpc_client = clp->cl_rpcclient,
5508 .rpc_message = &msg,
5509 .callback_ops = &nfs4_setclientid_ops,
5510 .callback_data = &setclientid,
5511 .flags = RPC_TASK_TIMEOUT,
5512 };
6bbb4ae8 5513 int status;
1da177e4 5514
de734831 5515 /* nfs_client_id4 */
f092075d 5516 nfs4_init_boot_verifier(clp, &sc_verifier);
873e3851
JL		 5517
5518 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
5519 status = nfs4_init_uniform_client_string(clp);
5520 else
a3192688 5521 status = nfs4_init_nonuniform_client_string(clp);
873e3851
JL		 5522
5523 if (status)
5524 goto out;
3a6bb738 5525
de734831 5526 /* cb_client4 */
706cb8db
CL		 5527 setclientid.sc_netid_len =
5528 nfs4_init_callback_netid(clp,
5529 setclientid.sc_netid,
5530 sizeof(setclientid.sc_netid));
de734831 5531 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 5532 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 5533 clp->cl_ipaddr, port >> 8, port & 255);
5534
3a6bb738 5535 dprintk("NFS call setclientid auth=%s, '%s'\n",
6bbb4ae8 5536 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3a6bb738 5537 clp->cl_owner_id);
f11b2a1c
JL		 5538 task = rpc_run_task(&task_setup_data);
5539 if (IS_ERR(task)) {
5540 status = PTR_ERR(task);
5541 goto out;
5542 }
5543 status = task->tk_status;
5544 if (setclientid.sc_cred) {
5545 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
5546 put_rpccred(setclientid.sc_cred);
5547 }
5548 rpc_put_task(task);
5549out:
c6d01c6f 5550 trace_nfs4_setclientid(clp, status);
6bbb4ae8
CL		 5551 dprintk("NFS reply setclientid: %d\n", status);
5552 return status;
1da177e4
LT		 5553}
5554
6bbb4ae8
CL		 5555/**
5556 * nfs4_proc_setclientid_confirm - Confirm client ID
5557 * @clp: state data structure
5558 * @res: result of a previous SETCLIENTID
5559 * @cred: RPC credential to use for this call
5560 *
5561 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5562 */
fd954ae1 5563int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 5564 struct nfs4_setclientid_res *arg,
5565 struct rpc_cred *cred)
1da177e4 5566{
1da177e4
LT		 5567 struct rpc_message msg = {
5568 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 5569 .rpc_argp = arg,
286d7d6a 5570 .rpc_cred = cred,
1da177e4 5571 };
1da177e4
LT		 5572 int status;
5573
6bbb4ae8
CL		 5574 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
5575 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5576 clp->cl_clientid);
1bd714f2 5577 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 5578 trace_nfs4_setclientid_confirm(clp, status);
6bbb4ae8 5579 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 5580 return status;
5581}
5582
fe650407
TM		 5583struct nfs4_delegreturndata {
5584 struct nfs4_delegreturnargs args;
fa178f29 5585 struct nfs4_delegreturnres res;
fe650407
TM		 5586 struct nfs_fh fh;
5587 nfs4_stateid stateid;
26e976a8 5588 unsigned long timestamp;
586f1c39
TM		 5589 struct {
5590 struct nfs4_layoutreturn_args arg;
5591 struct nfs4_layoutreturn_res res;
4d796d75 5592 struct nfs4_xdr_opaque_data ld_private;
586f1c39
TM		 5593 u32 roc_barrier;
5594 bool roc;
5595 } lr;
fa178f29 5596 struct nfs_fattr fattr;
fe650407 5597 int rpc_status;
039b756a 5598 struct inode *inode;
fe650407
TM		 5599};
5600
fe650407
TM		 5601static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
5602{
5603 struct nfs4_delegreturndata *data = calldata;
938e1010 5604
14516c3a
TM		 5605 if (!nfs4_sequence_done(task, &data->res.seq_res))
5606 return;
938e1010 5607
ca8acf8d 5608 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
586f1c39
TM		 5609
5610 /* Handle Layoutreturn errors */
5611 if (data->args.lr_args && task->tk_status != 0) {
5612 switch(data->res.lr_ret) {
5613 default:
5614 data->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
5615 break;
5616 case 0:
5617 data->args.lr_args = NULL;
5618 data->res.lr_res = NULL;
5619 break;
5620 case -NFS4ERR_ADMIN_REVOKED:
5621 case -NFS4ERR_DELEG_REVOKED:
5622 case -NFS4ERR_EXPIRED:
5623 case -NFS4ERR_BAD_STATEID:
5624 case -NFS4ERR_OLD_STATEID:
5625 case -NFS4ERR_UNKNOWN_LAYOUTTYPE:
5626 case -NFS4ERR_WRONG_CRED:
5627 data->args.lr_args = NULL;
5628 data->res.lr_res = NULL;
5629 data->res.lr_ret = 0;
5630 rpc_restart_call_prepare(task);
5631 return;
5632 }
5633 }
5634
79708861 5635 switch (task->tk_status) {
79708861 5636 case 0:
fa178f29 5637 renew_lease(data->res.server, data->timestamp);
23ea44c2 5638 break;
c97cf606
TM		 5639 case -NFS4ERR_ADMIN_REVOKED:
5640 case -NFS4ERR_DELEG_REVOKED:
26d36301
TM		 5641 case -NFS4ERR_EXPIRED:
5642 nfs4_free_revoked_stateid(data->res.server,
5643 data->args.stateid,
5644 task->tk_msg.rpc_cred);
c97cf606
TM		 5645 case -NFS4ERR_BAD_STATEID:
5646 case -NFS4ERR_OLD_STATEID:
5647 case -NFS4ERR_STALE_STATEID:
c97cf606
TM		 5648 task->tk_status = 0;
5649 break;
8ac2b422
TM		 5650 case -NFS4ERR_ACCESS:
5651 if (data->args.bitmask) {
5652 data->args.bitmask = NULL;
5653 data->res.fattr = NULL;
5654 task->tk_status = 0;
5655 rpc_restart_call_prepare(task);
5656 return;
5657 }
79708861 5658 default:
8478eaa1
N		 5659 if (nfs4_async_handle_error(task, data->res.server,
5660 NULL, NULL) == -EAGAIN) {
d00c5d43 5661 rpc_restart_call_prepare(task);
79708861
RL		 5662 return;
5663 }
5664 }
5665 data->rpc_status = task->tk_status;
fe650407
TM		 5666}
5667
5668static void nfs4_delegreturn_release(void *calldata)
5669{
039b756a 5670 struct nfs4_delegreturndata *data = calldata;
ea7c38fe 5671 struct inode *inode = data->inode;
039b756a 5672
ea7c38fe 5673 if (inode) {
586f1c39 5674 if (data->lr.roc)
1c5bd76d
TM		 5675 pnfs_roc_release(&data->lr.arg, &data->lr.res,
5676 data->res.lr_ret);
0bc2c9b4 5677 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
ea7c38fe
TM		 5678 nfs_iput_and_deactive(inode);
5679 }
fe650407
TM		 5680 kfree(calldata);
5681}
5682
938e1010
AA		 5683static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5684{
5685 struct nfs4_delegreturndata *d_data;
5686
5687 d_data = (struct nfs4_delegreturndata *)data;
5688
1c5bd76d 5689 if (!d_data->lr.roc && nfs4_wait_on_layoutreturn(d_data->inode, task))
500d701f
PT		 5690 return;
5691
42e1cca7 5692 nfs4_setup_sequence(d_data->res.server->nfs_client,
d9afbd1b
TM		 5693 &d_data->args.seq_args,
5694 &d_data->res.seq_res,
5695 task);
938e1010 5696}
938e1010 5697
c8d149f3 5698static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010 5699 .rpc_call_prepare = nfs4_delegreturn_prepare,
fe650407
TM		 5700 .rpc_call_done = nfs4_delegreturn_done,
5701 .rpc_release = nfs4_delegreturn_release,
5702};
5703
e6f81075 5704static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 5705{
5706 struct nfs4_delegreturndata *data;
fa178f29 5707 struct nfs_server *server = NFS_SERVER(inode);
fe650407 5708 struct rpc_task *task;
5138fde0
TM		 5709 struct rpc_message msg = {
5710 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5711 .rpc_cred = cred,
5712 };
c970aa85
TM		 5713 struct rpc_task_setup task_setup_data = {
5714 .rpc_client = server->client,
5138fde0 5715 .rpc_message = &msg,
c970aa85
TM		 5716 .callback_ops = &nfs4_delegreturn_ops,
5717 .flags = RPC_TASK_ASYNC,
5718 };
e6f81075 5719 int status = 0;
fe650407 5720
8535b2be 5721 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 5722 if (data == NULL)
5723 return -ENOMEM;
a9c92d6b 5724 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
99ade3c7
AE		 5725
5726 nfs4_state_protect(server->nfs_client,
5727 NFS_SP4_MACH_CRED_CLEANUP,
5728 &task_setup_data.rpc_client, &msg);
5729
fe650407
TM		 5730 data->args.fhandle = &data->fh;
5731 data->args.stateid = &data->stateid;
9e907fec 5732 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 5733 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 5734 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 5735 data->res.fattr = &data->fattr;
5736 data->res.server = server;
586f1c39 5737 data->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
4d796d75 5738 data->lr.arg.ld_private = &data->lr.ld_private;
5138fde0 5739 nfs_fattr_init(data->res.fattr);
26e976a8 5740 data->timestamp = jiffies;
fe650407 5741 data->rpc_status = 0;
53e6fc86 5742 data->lr.roc = pnfs_roc(inode, &data->lr.arg, &data->lr.res, cred);
ea7c38fe 5743 data->inode = nfs_igrab_and_active(inode);
1c5bd76d 5744 if (data->inode) {
1c5bd76d
TM		 5745 if (data->lr.roc) {
5746 data->args.lr_args = &data->lr.arg;
5747 data->res.lr_res = &data->lr.res;
5748 }
53e6fc86
TM		 5749 } else if (data->lr.roc) {
5750 pnfs_roc_release(&data->lr.arg, &data->lr.res, 0);
5751 data->lr.roc = false;
1c5bd76d 5752 }
fe650407 5753
c970aa85 5754 task_setup_data.callback_data = data;
1174dd1f
TM		 5755 msg.rpc_argp = &data->args;
5756 msg.rpc_resp = &data->res;
c970aa85 5757 task = rpc_run_task(&task_setup_data);
7a1218a2 5758 if (IS_ERR(task))
fe650407 5759 return PTR_ERR(task);
e6f81075
TM		 5760 if (!issync)
5761 goto out;
820bf85c 5762 status = rpc_wait_for_completion_task(task);
e6f81075
TM		 5763 if (status != 0)
5764 goto out;
5765 status = data->rpc_status;
e6f81075 5766out:
e6b3c4db 5767 rpc_put_task(task);
fe650407 5768 return status;
1da177e4
LT		 5769}
5770
e6f81075 5771int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 5772{
5773 struct nfs_server *server = NFS_SERVER(inode);
5774 struct nfs4_exception exception = { };
5775 int err;
5776 do {
e6f81075 5777 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
48c9579a 5778 trace_nfs4_delegreturn(inode, stateid, err);
1da177e4
LT		 5779 switch (err) {
5780 case -NFS4ERR_STALE_STATEID:
5781 case -NFS4ERR_EXPIRED:
1da177e4
LT		 5782 case 0:
5783 return 0;
5784 }
5785 err = nfs4_handle_exception(server, err, &exception);
5786 } while (exception.retry);
5787 return err;
5788}
5789
1da177e4
LT		 5790static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5791{
5792 struct inode *inode = state->inode;
5793 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 5794 struct nfs_client *clp = server->nfs_client;
911d1aaf 5795 struct nfs_lockt_args arg = {
1da177e4 5796 .fh = NFS_FH(inode),
911d1aaf 5797 .fl = request,
1da177e4 5798 };
911d1aaf
TM		 5799 struct nfs_lockt_res res = {
5800 .denied = request,
1da177e4
LT		 5801 };
5802 struct rpc_message msg = {
5803 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
d9b67e1e
AS		 5804 .rpc_argp = &arg,
5805 .rpc_resp = &res,
1da177e4
LT		 5806 .rpc_cred = state->owner->so_cred,
5807 };
1da177e4
LT		 5808 struct nfs4_lock_state *lsp;
5809 int status;
5810
911d1aaf 5811 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 5812 status = nfs4_set_lock_state(state, request);
5813 if (status != 0)
5814 goto out;
5815 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 5816 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5817 arg.lock_owner.s_dev = server->s_dev;
7c513058 5818 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 5819 switch (status) {
5820 case 0:
5821 request->fl_type = F_UNLCK;
5822 break;
5823 case -NFS4ERR_DENIED:
5824 status = 0;
1da177e4 5825 }
70cc6487 5826 request->fl_ops->fl_release_private(request);
a6f951dd 5827 request->fl_ops = NULL;
8d0a8a9d 5828out:
1da177e4
LT		 5829 return status;
5830}
5831
5832static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5833{
5834 struct nfs4_exception exception = { };
5835 int err;
5836
5837 do {
d1b748a5
TM		 5838 err = _nfs4_proc_getlk(state, cmd, request);
5839 trace_nfs4_get_lock(request, state, cmd, err);
5840 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
1da177e4
LT		 5841 &exception);
5842 } while (exception.retry);
5843 return err;
5844}
5845
faf5f49c 5846struct nfs4_unlockdata {
911d1aaf
TM		 5847 struct nfs_locku_args arg;
5848 struct nfs_locku_res res;
faf5f49c
TM		 5849 struct nfs4_lock_state *lsp;
5850 struct nfs_open_context *ctx;
f30cb757 5851 struct nfs_lock_context *l_ctx;
911d1aaf 5852 struct file_lock fl;
516285eb 5853 struct nfs_server *server;
26e976a8 5854 unsigned long timestamp;
faf5f49c
TM		 5855};
5856
911d1aaf
TM		 5857static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5858 struct nfs_open_context *ctx,
5859 struct nfs4_lock_state *lsp,
5860 struct nfs_seqid *seqid)
5861{
5862 struct nfs4_unlockdata *p;
5863 struct inode *inode = lsp->ls_state->inode;
5864
8535b2be 5865 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 5866 if (p == NULL)
5867 return NULL;
5868 p->arg.fh = NFS_FH(inode);
5869 p->arg.fl = &p->fl;
5870 p->arg.seqid = seqid;
c1d51931 5871 p->res.seqid = seqid;
911d1aaf
TM		 5872 p->lsp = lsp;
5873 atomic_inc(&lsp->ls_count);
5874 /* Ensure we don't close file until we're done freeing locks! */
5875 p->ctx = get_nfs_open_context(ctx);
f30cb757 5876 p->l_ctx = nfs_get_lock_context(ctx);
911d1aaf
TM		 5877 memcpy(&p->fl, fl, sizeof(p->fl));
5878 p->server = NFS_SERVER(inode);
5879 return p;
5880}
5881
06f814a3 5882static void nfs4_locku_release_calldata(void *data)
faf5f49c 5883{
963d8fe5 5884 struct nfs4_unlockdata *calldata = data;
911d1aaf 5885 nfs_free_seqid(calldata->arg.seqid);
06f814a3 5886 nfs4_put_lock_state(calldata->lsp);
f30cb757 5887 nfs_put_lock_context(calldata->l_ctx);
06f814a3
TM		 5888 put_nfs_open_context(calldata->ctx);
5889 kfree(calldata);
faf5f49c
TM		 5890}
5891
963d8fe5 5892static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 5893{
963d8fe5 5894 struct nfs4_unlockdata *calldata = data;
faf5f49c 5895
14516c3a
TM		 5896 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5897 return;
faf5f49c
TM		 5898 switch (task->tk_status) {
5899 case 0:
26e976a8 5900 renew_lease(calldata->server, calldata->timestamp);
75575ddf 5901 locks_lock_inode_wait(calldata->lsp->ls_state->inode, &calldata->fl);
c69899a1
TM		 5902 if (nfs4_update_lock_stateid(calldata->lsp,
5903 &calldata->res.stateid))
5904 break;
26d36301
TM		 5905 case -NFS4ERR_ADMIN_REVOKED:
5906 case -NFS4ERR_EXPIRED:
5907 nfs4_free_revoked_stateid(calldata->server,
5908 &calldata->arg.stateid,
5909 task->tk_msg.rpc_cred);
9e33bed5
TM		 5910 case -NFS4ERR_BAD_STATEID:
5911 case -NFS4ERR_OLD_STATEID:
faf5f49c 5912 case -NFS4ERR_STALE_STATEID:
425c1d4e
TM		 5913 if (!nfs4_stateid_match(&calldata->arg.stateid,
5914 &calldata->lsp->ls_stateid))
5915 rpc_restart_call_prepare(task);
faf5f49c
TM		 5916 break;
5917 default:
8478eaa1
N		 5918 if (nfs4_async_handle_error(task, calldata->server,
5919 NULL, NULL) == -EAGAIN)
d00c5d43 5920 rpc_restart_call_prepare(task);
faf5f49c 5921 }
2b1bc308 5922 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 5923}
5924
4ce70ada 5925static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 5926{
4ce70ada 5927 struct nfs4_unlockdata *calldata = data;
faf5f49c 5928
f30cb757
BC		 5929 if (test_bit(NFS_CONTEXT_UNLOCK, &calldata->l_ctx->open_context->flags) &&
5930 nfs_async_iocounter_wait(task, calldata->l_ctx))
5931 return;
5932
911d1aaf 5933 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 5934 goto out_wait;
425c1d4e 5935 nfs4_stateid_copy(&calldata->arg.stateid, &calldata->lsp->ls_stateid);
795a88c9 5936 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 5937 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 5938 goto out_no_action;
faf5f49c 5939 }
26e976a8 5940 calldata->timestamp = jiffies;
42e1cca7 5941 if (nfs4_setup_sequence(calldata->server->nfs_client,
a893693c 5942 &calldata->arg.seq_args,
2240a9e2
TM		 5943 &calldata->res.seq_res,
5944 task) != 0)
5945 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 5946 return;
5947out_no_action:
5948 task->tk_action = NULL;
5949out_wait:
5950 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 5951}
5952
963d8fe5 5953static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 5954 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 5955 .rpc_call_done = nfs4_locku_done,
06f814a3 5956 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 5957};
5958
a5d16a4d
TM		 5959static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5960 struct nfs_open_context *ctx,
5961 struct nfs4_lock_state *lsp,
5962 struct nfs_seqid *seqid)
5963{
5964 struct nfs4_unlockdata *data;
5138fde0
TM		 5965 struct rpc_message msg = {
5966 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5967 .rpc_cred = ctx->cred,
5968 };
c970aa85
TM		 5969 struct rpc_task_setup task_setup_data = {
5970 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 5971 .rpc_message = &msg,
c970aa85 5972 .callback_ops = &nfs4_locku_ops,
101070ca 5973 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5974 .flags = RPC_TASK_ASYNC,
5975 };
a5d16a4d 5976
fa940720
WAA		 5977 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5978 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5979
137d6aca
FF		 5980 /* Ensure this is an unlock - when canceling a lock, the
5981 * canceled lock is passed in, and it won't be an unlock.
5982 */
5983 fl->fl_type = F_UNLCK;
f30cb757
BC		 5984 if (fl->fl_flags & FL_CLOSE)
5985 set_bit(NFS_CONTEXT_UNLOCK, &ctx->flags);
137d6aca 5986
a5d16a4d
TM		 5987 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5988 if (data == NULL) {
5989 nfs_free_seqid(seqid);
5990 return ERR_PTR(-ENOMEM);
5991 }
5992
a9c92d6b 5993 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5994 msg.rpc_argp = &data->arg;
5995 msg.rpc_resp = &data->res;
c970aa85
TM		 5996 task_setup_data.callback_data = data;
5997 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 5998}
5999
faf5f49c
TM		 6000static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
6001{
65b62a29
TM		 6002 struct inode *inode = state->inode;
6003 struct nfs4_state_owner *sp = state->owner;
6004 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 6005 struct nfs_seqid *seqid;
1da177e4 6006 struct nfs4_lock_state *lsp;
06f814a3 6007 struct rpc_task *task;
b4019c0e 6008 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
06f814a3 6009 int status = 0;
536ff0f8 6010 unsigned char fl_flags = request->fl_flags;
faf5f49c 6011
8d0a8a9d 6012 status = nfs4_set_lock_state(state, request);
9b073574
TM		 6013 /* Unlock _before_ we do the RPC call */
6014 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 6015 /* Exclude nfs_delegation_claim_locks() */
6016 mutex_lock(&sp->so_delegreturn_mutex);
6017 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57 6018 down_read(&nfsi->rwsem);
75575ddf 6019 if (locks_lock_inode_wait(inode, request) == -ENOENT) {
19e03c57 6020 up_read(&nfsi->rwsem);
65b62a29 6021 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 6022 goto out;
19e03c57
TM		 6023 }
6024 up_read(&nfsi->rwsem);
65b62a29 6025 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 6026 if (status != 0)
9b073574
TM		 6027 goto out;
6028 /* Is this a delegated lock? */
8d0a8a9d 6029 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 6030 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
6031 goto out;
b4019c0e
TM		 6032 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid;
6033 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 6034 status = -ENOMEM;
badc76dd 6035 if (IS_ERR(seqid))
9b073574 6036 goto out;
cd3758e3 6037 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 6038 status = PTR_ERR(task);
6039 if (IS_ERR(task))
9b073574 6040 goto out;
820bf85c 6041 status = rpc_wait_for_completion_task(task);
e6b3c4db 6042 rpc_put_task(task);
9b073574 6043out:
536ff0f8 6044 request->fl_flags = fl_flags;
d1b748a5 6045 trace_nfs4_unlock(request, state, F_SETLK, status);
1da177e4
LT		 6046 return status;
6047}
6048
a5d16a4d
TM		 6049struct nfs4_lockdata {
6050 struct nfs_lock_args arg;
6051 struct nfs_lock_res res;
6052 struct nfs4_lock_state *lsp;
6053 struct nfs_open_context *ctx;
6054 struct file_lock fl;
26e976a8 6055 unsigned long timestamp;
a5d16a4d
TM		 6056 int rpc_status;
6057 int cancelled;
66179efe 6058 struct nfs_server *server;
a5d16a4d
TM		 6059};
6060
6061static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 6062 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
6063 gfp_t gfp_mask)
1da177e4 6064{
a5d16a4d
TM		 6065 struct nfs4_lockdata *p;
6066 struct inode *inode = lsp->ls_state->inode;
1da177e4 6067 struct nfs_server *server = NFS_SERVER(inode);
b4019c0e 6068 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
a5d16a4d 6069
8535b2be 6070 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 6071 if (p == NULL)
6072 return NULL;
6073
6074 p->arg.fh = NFS_FH(inode);
6075 p->arg.fl = &p->fl;
8535b2be 6076 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
badc76dd 6077 if (IS_ERR(p->arg.open_seqid))
2f74c0a0 6078 goto out_free;
b4019c0e
TM		 6079 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
6080 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask);
badc76dd 6081 if (IS_ERR(p->arg.lock_seqid))
2f74c0a0 6082 goto out_free_seqid;
7539bbab 6083 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 6084 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 6085 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 6086 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 6087 p->lsp = lsp;
66179efe 6088 p->server = server;
a5d16a4d
TM		 6089 atomic_inc(&lsp->ls_count);
6090 p->ctx = get_nfs_open_context(ctx);
6091 memcpy(&p->fl, fl, sizeof(p->fl));
6092 return p;
2f74c0a0
TM		 6093out_free_seqid:
6094 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 6095out_free:
6096 kfree(p);
6097 return NULL;
6098}
6099
6100static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
6101{
6102 struct nfs4_lockdata *data = calldata;
6103 struct nfs4_state *state = data->lsp->ls_state;
06735b34 6104
3110ff80 6105 dprintk("%s: begin!\n", __func__);
2f74c0a0 6106 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 6107 goto out_wait;
a5d16a4d 6108 /* Do we need to do an open_to_lock_owner? */
6b447539 6109 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) {
8fe72bac 6110 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 6111 goto out_release_lock_seqid;
8fe72bac 6112 }
425c1d4e
TM		 6113 nfs4_stateid_copy(&data->arg.open_stateid,
6114 &state->open_stateid);
a5d16a4d 6115 data->arg.new_lock_owner = 1;
c1d51931 6116 data->res.open_seqid = data->arg.open_seqid;
425c1d4e 6117 } else {
2f74c0a0 6118 data->arg.new_lock_owner = 0;
425c1d4e
TM		 6119 nfs4_stateid_copy(&data->arg.lock_stateid,
6120 &data->lsp->ls_stateid);
6121 }
5d422301
TM		 6122 if (!nfs4_valid_open_stateid(state)) {
6123 data->rpc_status = -EBADF;
6124 task->tk_action = NULL;
6125 goto out_release_open_seqid;
6126 }
26e976a8 6127 data->timestamp = jiffies;
42e1cca7 6128 if (nfs4_setup_sequence(data->server->nfs_client,
035168ab 6129 &data->arg.seq_args,
2240a9e2 6130 &data->res.seq_res,
d9afbd1b 6131 task) == 0)
66179efe 6132 return;
5d422301 6133out_release_open_seqid:
2240a9e2
TM		 6134 nfs_release_seqid(data->arg.open_seqid);
6135out_release_lock_seqid:
6136 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 6137out_wait:
6138 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 6139 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 6140}
6141
a5d16a4d
TM		 6142static void nfs4_lock_done(struct rpc_task *task, void *calldata)
6143{
6144 struct nfs4_lockdata *data = calldata;
39071e6f 6145 struct nfs4_lock_state *lsp = data->lsp;
a5d16a4d 6146
3110ff80 6147 dprintk("%s: begin!\n", __func__);
a5d16a4d 6148
14516c3a
TM		 6149 if (!nfs4_sequence_done(task, &data->res.seq_res))
6150 return;
66179efe 6151
a5d16a4d 6152 data->rpc_status = task->tk_status;
425c1d4e
TM		 6153 switch (task->tk_status) {
6154 case 0:
2b0143b5 6155 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)),
39071e6f 6156 data->timestamp);
c69899a1
TM		 6157 if (data->arg.new_lock) {
6158 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS);
75575ddf 6159 if (locks_lock_inode_wait(lsp->ls_state->inode, &data->fl) < 0) {
c69899a1
TM		 6160 rpc_restart_call_prepare(task);
6161 break;
6162 }
6163 }
39071e6f
TM		 6164 if (data->arg.new_lock_owner != 0) {
6165 nfs_confirm_seqid(&lsp->ls_seqid, 0);
6166 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid);
6167 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
6168 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid))
6169 rpc_restart_call_prepare(task);
425c1d4e
TM		 6170 break;
6171 case -NFS4ERR_BAD_STATEID:
6172 case -NFS4ERR_OLD_STATEID:
6173 case -NFS4ERR_STALE_STATEID:
6174 case -NFS4ERR_EXPIRED:
6175 if (data->arg.new_lock_owner != 0) {
6176 if (!nfs4_stateid_match(&data->arg.open_stateid,
6177 &lsp->ls_state->open_stateid))
6178 rpc_restart_call_prepare(task);
6179 } else if (!nfs4_stateid_match(&data->arg.lock_stateid,
6180 &lsp->ls_stateid))
6181 rpc_restart_call_prepare(task);
a5d16a4d 6182 }
3110ff80 6183 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 6184}
6185
6186static void nfs4_lock_release(void *calldata)
6187{
6188 struct nfs4_lockdata *data = calldata;
6189
3110ff80 6190 dprintk("%s: begin!\n", __func__);
2f74c0a0 6191 nfs_free_seqid(data->arg.open_seqid);
a7a3b1e9 6192 if (data->cancelled) {
a5d16a4d
TM		 6193 struct rpc_task *task;
6194 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
6195 data->arg.lock_seqid);
6196 if (!IS_ERR(task))
bf294b41 6197 rpc_put_task_async(task);
3110ff80 6198 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 6199 } else
6200 nfs_free_seqid(data->arg.lock_seqid);
6201 nfs4_put_lock_state(data->lsp);
6202 put_nfs_open_context(data->ctx);
6203 kfree(data);
3110ff80 6204 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 6205}
6206
6207static const struct rpc_call_ops nfs4_lock_ops = {
6208 .rpc_call_prepare = nfs4_lock_prepare,
6209 .rpc_call_done = nfs4_lock_done,
6210 .rpc_release = nfs4_lock_release,
6211};
6212
2bee72a6
TM		 6213static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
6214{
2bee72a6
TM		 6215 switch (error) {
6216 case -NFS4ERR_ADMIN_REVOKED:
d7f3e4bf 6217 case -NFS4ERR_EXPIRED:
2bee72a6 6218 case -NFS4ERR_BAD_STATEID:
ecac799a 6219 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 6220 if (new_lock_owner != 0 ||
795a88c9 6221 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 6222 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 6223 break;
6224 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 6225 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a 6226 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 6227 };
6228}
6229
afe6c27c 6230static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 6231{
6232 struct nfs4_lockdata *data;
6233 struct rpc_task *task;
5138fde0
TM		 6234 struct rpc_message msg = {
6235 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
6236 .rpc_cred = state->owner->so_cred,
6237 };
c970aa85
TM		 6238 struct rpc_task_setup task_setup_data = {
6239 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 6240 .rpc_message = &msg,
c970aa85 6241 .callback_ops = &nfs4_lock_ops,
101070ca 6242 .workqueue = nfsiod_workqueue,
c970aa85
TM		 6243 .flags = RPC_TASK_ASYNC,
6244 };
a5d16a4d
TM		 6245 int ret;
6246
3110ff80 6247 dprintk("%s: begin!\n", __func__);
cd3758e3 6248 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 6249 fl->fl_u.nfs4_fl.owner,
6250 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 6251 if (data == NULL)
6252 return -ENOMEM;
6253 if (IS_SETLKW(cmd))
6254 data->arg.block = 1;
a9c92d6b 6255 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 6256 msg.rpc_argp = &data->arg;
6257 msg.rpc_resp = &data->res;
c970aa85 6258 task_setup_data.callback_data = data;
8fe72bac
TM		 6259 if (recovery_type > NFS_LOCK_NEW) {
6260 if (recovery_type == NFS_LOCK_RECLAIM)
6261 data->arg.reclaim = NFS_LOCK_RECLAIM;
6262 nfs4_set_sequence_privileged(&data->arg.seq_args);
c69899a1
TM		 6263 } else
6264 data->arg.new_lock = 1;
c970aa85 6265 task = rpc_run_task(&task_setup_data);
7a1218a2 6266 if (IS_ERR(task))
a5d16a4d 6267 return PTR_ERR(task);
820bf85c 6268 ret = rpc_wait_for_completion_task(task);
a5d16a4d
TM		 6269 if (ret == 0) {
6270 ret = data->rpc_status;
2bee72a6
TM		 6271 if (ret)
6272 nfs4_handle_setlk_error(data->server, data->lsp,
6273 data->arg.new_lock_owner, ret);
a5d16a4d 6274 } else
a7a3b1e9 6275 data->cancelled = true;
e6b3c4db 6276 rpc_put_task(task);
3110ff80 6277 dprintk("%s: done, ret = %d!\n", __func__, ret);
48c9579a 6278 trace_nfs4_set_lock(fl, state, &data->res.stateid, cmd, ret);
a5d16a4d 6279 return ret;
1da177e4
LT		 6280}
6281
6282static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
6283{
202b50dc 6284 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 6285 struct nfs4_exception exception = {
6286 .inode = state->inode,
6287 };
202b50dc
TM		 6288 int err;
6289
6290 do {
42a2d13e
TM		 6291 /* Cache the lock if possible... */
6292 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
6293 return 0;
afe6c27c 6294 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 6295 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 6296 break;
6297 nfs4_handle_exception(server, err, &exception);
6298 } while (exception.retry);
6299 return err;
1da177e4
LT		 6300}
6301
6302static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
6303{
202b50dc 6304 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 6305 struct nfs4_exception exception = {
6306 .inode = state->inode,
6307 };
202b50dc
TM		 6308 int err;
6309
6bfc93ef
TM		 6310 err = nfs4_set_lock_state(state, request);
6311 if (err != 0)
6312 return err;
f6de7a39 6313 if (!recover_lost_locks) {
ef1820f9
N		 6314 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
6315 return 0;
6316 }
202b50dc 6317 do {
42a2d13e
TM		 6318 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
6319 return 0;
afe6c27c 6320 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 6321 switch (err) {
6322 default:
6323 goto out;
6324 case -NFS4ERR_GRACE:
6325 case -NFS4ERR_DELAY:
6326 nfs4_handle_exception(server, err, &exception);
6327 err = 0;
6328 }
202b50dc 6329 } while (exception.retry);
a9ed2e25 6330out:
202b50dc 6331 return err;
1da177e4
LT		 6332}
6333
f062eb6c 6334#if defined(CONFIG_NFS_V4_1)
b01dd1d8
BS		 6335static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
6336{
c5896fc8
TM		 6337 struct nfs4_lock_state *lsp;
6338 int status;
b01dd1d8 6339
c5896fc8
TM		 6340 status = nfs4_set_lock_state(state, request);
6341 if (status != 0)
6342 return status;
6343 lsp = request->fl_u.nfs4_fl.owner;
6344 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) ||
6345 test_bit(NFS_LOCK_LOST, &lsp->ls_flags))
6346 return 0;
81b68de4 6347 return nfs4_lock_expired(state, request);
f062eb6c
BS		 6348}
6349#endif
6350
1da177e4
LT		 6351static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6352{
19e03c57 6353 struct nfs_inode *nfsi = NFS_I(state->inode);
11476e9d 6354 struct nfs4_state_owner *sp = state->owner;
01c3b861 6355 unsigned char fl_flags = request->fl_flags;
1ea67dbd 6356 int status;
1da177e4 6357
01c3b861 6358 request->fl_flags |= FL_ACCESS;
75575ddf 6359 status = locks_lock_inode_wait(state->inode, request);
01c3b861
TM		 6360 if (status < 0)
6361 goto out;
11476e9d 6362 mutex_lock(&sp->so_delegreturn_mutex);
19e03c57 6363 down_read(&nfsi->rwsem);
01c3b861 6364 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 6365 /* Yes: cache locks! */
01c3b861 6366 /* ...but avoid races with delegation recall... */
19e03c57 6367 request->fl_flags = fl_flags & ~FL_SLEEP;
75575ddf 6368 status = locks_lock_inode_wait(state->inode, request);
c69899a1 6369 up_read(&nfsi->rwsem);
11476e9d 6370 mutex_unlock(&sp->so_delegreturn_mutex);
9a99af49 6371 goto out;
9a99af49 6372 }
19e03c57 6373 up_read(&nfsi->rwsem);
11476e9d 6374 mutex_unlock(&sp->so_delegreturn_mutex);
c69899a1 6375 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
01c3b861
TM		 6376out:
6377 request->fl_flags = fl_flags;
1da177e4
LT		 6378 return status;
6379}
6380
6381static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6382{
a1d0b5ee
TM		 6383 struct nfs4_exception exception = {
6384 .state = state,
05ffe24f 6385 .inode = state->inode,
a1d0b5ee 6386 };
1da177e4
LT		 6387 int err;
6388
6389 do {
965b5d67
TM		 6390 err = _nfs4_proc_setlk(state, cmd, request);
6391 if (err == -NFS4ERR_DENIED)
6392 err = -EAGAIN;
1da177e4 6393 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 6394 err, &exception);
1da177e4
LT		 6395 } while (exception.retry);
6396 return err;
6397}
6398
d2f3a7f9
JL		 6399#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
6400#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
6401
6402static int
a1d617d8
JL		 6403nfs4_retry_setlk_simple(struct nfs4_state *state, int cmd,
6404 struct file_lock *request)
d2f3a7f9
JL		 6405{
6406 int status = -ERESTARTSYS;
6407 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
6408
6409 while(!signalled()) {
6410 status = nfs4_proc_setlk(state, cmd, request);
6411 if ((status != -EAGAIN) || IS_SETLK(cmd))
6412 break;
6413 freezable_schedule_timeout_interruptible(timeout);
6414 timeout *= 2;
6415 timeout = min_t(unsigned long, NFS4_LOCK_MAXTIMEOUT, timeout);
6416 status = -ERESTARTSYS;
6417 }
6418 return status;
6419}
6420
a1d617d8
JL		 6421#ifdef CONFIG_NFS_V4_1
6422struct nfs4_lock_waiter {
6423 struct task_struct *task;
6424 struct inode *inode;
6425 struct nfs_lowner *owner;
6426 bool notified;
6427};
6428
6429static int
ac6424b9 6430nfs4_wake_lock_waiter(wait_queue_entry_t *wait, unsigned int mode, int flags, void *key)
a1d617d8
JL		 6431{
6432 int ret;
6433 struct cb_notify_lock_args *cbnl = key;
6434 struct nfs4_lock_waiter *waiter = wait->private;
6435 struct nfs_lowner *lowner = &cbnl->cbnl_owner,
6436 *wowner = waiter->owner;
6437
6438 /* Only wake if the callback was for the same owner */
6439 if (lowner->clientid != wowner->clientid ||
6440 lowner->id != wowner->id ||
6441 lowner->s_dev != wowner->s_dev)
6442 return 0;
6443
6444 /* Make sure it's for the right inode */
6445 if (nfs_compare_fh(NFS_FH(waiter->inode), &cbnl->cbnl_fh))
6446 return 0;
6447
6448 waiter->notified = true;
6449
6450 /* override "private" so we can use default_wake_function */
6451 wait->private = waiter->task;
6452 ret = autoremove_wake_function(wait, mode, flags, key);
6453 wait->private = waiter;
6454 return ret;
6455}
6456
6457static int
6458nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6459{
6460 int status = -ERESTARTSYS;
6461 unsigned long flags;
6462 struct nfs4_lock_state *lsp = request->fl_u.nfs4_fl.owner;
6463 struct nfs_server *server = NFS_SERVER(state->inode);
6464 struct nfs_client *clp = server->nfs_client;
6465 wait_queue_head_t *q = &clp->cl_lock_waitq;
6466 struct nfs_lowner owner = { .clientid = clp->cl_clientid,
6467 .id = lsp->ls_seqid.owner_id,
6468 .s_dev = server->s_dev };
6469 struct nfs4_lock_waiter waiter = { .task = current,
6470 .inode = state->inode,
6471 .owner = &owner,
6472 .notified = false };
ac6424b9 6473 wait_queue_entry_t wait;
a1d617d8
JL		 6474
6475 /* Don't bother with waitqueue if we don't expect a callback */
6476 if (!test_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags))
6477 return nfs4_retry_setlk_simple(state, cmd, request);
6478
6479 init_wait(&wait);
6480 wait.private = &waiter;
6481 wait.func = nfs4_wake_lock_waiter;
6482 add_wait_queue(q, &wait);
6483
6484 while(!signalled()) {
6485 status = nfs4_proc_setlk(state, cmd, request);
6486 if ((status != -EAGAIN) || IS_SETLK(cmd))
6487 break;
6488
6489 status = -ERESTARTSYS;
6490 spin_lock_irqsave(&q->lock, flags);
6491 if (waiter.notified) {
6492 spin_unlock_irqrestore(&q->lock, flags);
6493 continue;
6494 }
6495 set_current_state(TASK_INTERRUPTIBLE);
6496 spin_unlock_irqrestore(&q->lock, flags);
6497
b7dbcc0e 6498 freezable_schedule_timeout(NFS4_LOCK_MAXTIMEOUT);
a1d617d8
JL		 6499 }
6500
6501 finish_wait(q, &wait);
6502 return status;
6503}
6504#else /* !CONFIG_NFS_V4_1 */
6505static inline int
6506nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6507{
6508 return nfs4_retry_setlk_simple(state, cmd, request);
6509}
6510#endif
6511
1da177e4
LT		 6512static int
6513nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
6514{
6515 struct nfs_open_context *ctx;
6516 struct nfs4_state *state;
1da177e4
LT		 6517 int status;
6518
6519 /* verify open state */
cd3758e3 6520 ctx = nfs_file_open_context(filp);
1da177e4
LT		 6521 state = ctx->state;
6522
d953126a
TM		 6523 if (IS_GETLK(cmd)) {
6524 if (state != NULL)
6525 return nfs4_proc_getlk(state, F_GETLK, request);
6526 return 0;
6527 }
1da177e4
LT		 6528
6529 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
6530 return -EINVAL;
6531
d953126a
TM		 6532 if (request->fl_type == F_UNLCK) {
6533 if (state != NULL)
6534 return nfs4_proc_unlck(state, cmd, request);
6535 return 0;
6536 }
1da177e4 6537
d953126a
TM		 6538 if (state == NULL)
6539 return -ENOLCK;
1ea67dbd
JL		 6540
6541 if ((request->fl_flags & FL_POSIX) &&
6542 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
6543 return -ENOLCK;
6544
1ea67dbd
JL		 6545 status = nfs4_set_lock_state(state, request);
6546 if (status != 0)
6547 return status;
6548
d2f3a7f9 6549 return nfs4_retry_setlk(state, cmd, request);
1da177e4
LT		 6550}
6551
db4f2e63 6552int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 6553{
6554 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 6555 int err;
6556
6557 err = nfs4_set_lock_state(state, fl);
6558 if (err != 0)
db4f2e63 6559 return err;
4a706fa0 6560 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 6561 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 6562}
6b3b5496 6563
cf470c3e
TM		 6564struct nfs_release_lockowner_data {
6565 struct nfs4_lock_state *lsp;
5ae67c4f 6566 struct nfs_server *server;
cf470c3e 6567 struct nfs_release_lockowner_args args;
b7e63a10 6568 struct nfs_release_lockowner_res res;
60ea6812 6569 unsigned long timestamp;
cf470c3e
TM		 6570};
6571
fbd4bfd1
CL		 6572static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
6573{
6574 struct nfs_release_lockowner_data *data = calldata;
5b53dc88 6575 struct nfs_server *server = data->server;
7981c8a6
AS		 6576 nfs4_setup_sequence(server->nfs_client, &data->args.seq_args,
6577 &data->res.seq_res, task);
5b53dc88 6578 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
60ea6812 6579 data->timestamp = jiffies;
fbd4bfd1
CL		 6580}
6581
6582static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
6583{
6584 struct nfs_release_lockowner_data *data = calldata;
60ea6812
CL		 6585 struct nfs_server *server = data->server;
6586
b7e63a10 6587 nfs40_sequence_done(task, &data->res.seq_res);
60ea6812
CL		 6588
6589 switch (task->tk_status) {
6590 case 0:
6591 renew_lease(server, data->timestamp);
6592 break;
6593 case -NFS4ERR_STALE_CLIENTID:
6594 case -NFS4ERR_EXPIRED:
5b53dc88
KM		 6595 nfs4_schedule_lease_recovery(server->nfs_client);
6596 break;
60ea6812
CL		 6597 case -NFS4ERR_LEASE_MOVED:
6598 case -NFS4ERR_DELAY:
8478eaa1
N		 6599 if (nfs4_async_handle_error(task, server,
6600 NULL, NULL) == -EAGAIN)
60ea6812
CL		 6601 rpc_restart_call_prepare(task);
6602 }
fbd4bfd1
CL		 6603}
6604
d3c7b7cc
TM		 6605static void nfs4_release_lockowner_release(void *calldata)
6606{
cf470c3e 6607 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 6608 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 6609 kfree(calldata);
6610}
6611
17280175 6612static const struct rpc_call_ops nfs4_release_lockowner_ops = {
fbd4bfd1
CL		 6613 .rpc_call_prepare = nfs4_release_lockowner_prepare,
6614 .rpc_call_done = nfs4_release_lockowner_done,
d3c7b7cc
TM		 6615 .rpc_release = nfs4_release_lockowner_release,
6616};
6617
f1cdae87
JL		 6618static void
6619nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 6620{
cf470c3e 6621 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 6622 struct rpc_message msg = {
6623 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
6624 };
6625
6626 if (server->nfs_client->cl_mvops->minor_version != 0)
f1cdae87 6627 return;
fbd4bfd1 6628
cf470c3e
TM		 6629 data = kmalloc(sizeof(*data), GFP_NOFS);
6630 if (!data)
f1cdae87 6631 return;
cf470c3e 6632 data->lsp = lsp;
5ae67c4f 6633 data->server = server;
cf470c3e
TM		 6634 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6635 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
6636 data->args.lock_owner.s_dev = server->s_dev;
fbd4bfd1 6637
cf470c3e 6638 msg.rpc_argp = &data->args;
b7e63a10
TM		 6639 msg.rpc_resp = &data->res;
6640 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
cf470c3e 6641 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
d3c7b7cc
TM		 6642}
6643
aa1870af
BF		 6644#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
6645
d9a82a04 6646static int nfs4_xattr_set_nfs4_acl(const struct xattr_handler *handler,
59301226
AV		 6647 struct dentry *unused, struct inode *inode,
6648 const char *key, const void *buf,
6649 size_t buflen, int flags)
6b3b5496 6650{
59301226 6651 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 6652}
6653
d9a82a04 6654static int nfs4_xattr_get_nfs4_acl(const struct xattr_handler *handler,
b296821a
AV		 6655 struct dentry *unused, struct inode *inode,
6656 const char *key, void *buf, size_t buflen)
6b3b5496 6657{
b296821a 6658 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 6659}
6660
764a5c6b 6661static bool nfs4_xattr_list_nfs4_acl(struct dentry *dentry)
6b3b5496 6662{
764a5c6b 6663 return nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry)));
6b3b5496
BF		 6664}
6665
c9bccef6 6666#ifdef CONFIG_NFS_V4_SECURITY_LABEL
c9bccef6 6667
d9a82a04 6668static int nfs4_xattr_set_nfs4_label(const struct xattr_handler *handler,
59301226
AV		 6669 struct dentry *unused, struct inode *inode,
6670 const char *key, const void *buf,
6671 size_t buflen, int flags)
c9bccef6
DQ		 6672{
6673 if (security_ismaclabel(key))
59301226 6674 return nfs4_set_security_label(inode, buf, buflen);
c9bccef6
DQ		 6675
6676 return -EOPNOTSUPP;
6677}
6678
d9a82a04 6679static int nfs4_xattr_get_nfs4_label(const struct xattr_handler *handler,
b296821a
AV		 6680 struct dentry *unused, struct inode *inode,
6681 const char *key, void *buf, size_t buflen)
c9bccef6
DQ		 6682{
6683 if (security_ismaclabel(key))
b296821a 6684 return nfs4_get_security_label(inode, buf, buflen);
c9bccef6
DQ		 6685 return -EOPNOTSUPP;
6686}
6687
c4803c49
AG		 6688static ssize_t
6689nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
c9bccef6 6690{
c4803c49 6691 int len = 0;
c9bccef6 6692
c4803c49
AG		 6693 if (nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) {
6694 len = security_inode_listsecurity(inode, list, list_len);
6695 if (list_len && len > list_len)
6696 return -ERANGE;
c9bccef6
DQ		 6697 }
6698 return len;
6699}
6700
6701static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
6702 .prefix = XATTR_SECURITY_PREFIX,
c9bccef6
DQ		 6703 .get = nfs4_xattr_get_nfs4_label,
6704 .set = nfs4_xattr_set_nfs4_label,
6705};
c9bccef6 6706
c4803c49
AG		 6707#else
6708
6709static ssize_t
6710nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
6711{
6712 return 0;
6713}
6714
6715#endif
c9bccef6 6716
533eb461
AA		 6717/*
6718 * nfs_fhget will use either the mounted_on_fileid or the fileid
6719 */
69aaaae1
TM		 6720static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6721{
533eb461
AA		 6722 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6723 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6724 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 6725 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 6726 return;
6727
6728 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 6729 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 6730 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6731 fattr->nlink = 2;
6732}
6733
f05d147f
BS		 6734static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6735 const struct qstr *name,
6736 struct nfs4_fs_locations *fs_locations,
6737 struct page *page)
683b57b4
TM		 6738{
6739 struct nfs_server *server = NFS_SERVER(dir);
a09df2ca 6740 u32 bitmask[3] = {
361e624f 6741 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 6742 };
6743 struct nfs4_fs_locations_arg args = {
6744 .dir_fh = NFS_FH(dir),
c228fd3a 6745 .name = name,
683b57b4
TM		 6746 .page = page,
6747 .bitmask = bitmask,
6748 };
22958463
BH		 6749 struct nfs4_fs_locations_res res = {
6750 .fs_locations = fs_locations,
6751 };
683b57b4
TM		 6752 struct rpc_message msg = {
6753 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6754 .rpc_argp = &args,
22958463 6755 .rpc_resp = &res,
683b57b4
TM		 6756 };
6757 int status;
6758
3110ff80 6759 dprintk("%s: start\n", __func__);
533eb461
AA		 6760
6761 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6762 * is not supported */
6763 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6764 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6765 else
6766 bitmask[0] |= FATTR4_WORD0_FILEID;
6767
c228fd3a 6768 nfs_fattr_init(&fs_locations->fattr);
683b57b4 6769 fs_locations->server = server;
830b8e33 6770 fs_locations->nlocations = 0;
f05d147f 6771 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 6772 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 6773 return status;
6774}
6775
f05d147f
BS		 6776int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6777 const struct qstr *name,
6778 struct nfs4_fs_locations *fs_locations,
6779 struct page *page)
db0a9593
BS		 6780{
6781 struct nfs4_exception exception = { };
6782 int err;
6783 do {
078ea3df
TM		 6784 err = _nfs4_proc_fs_locations(client, dir, name,
6785 fs_locations, page);
6786 trace_nfs4_get_fs_locations(dir, name, err);
6787 err = nfs4_handle_exception(NFS_SERVER(dir), err,
db0a9593
BS		 6788 &exception);
6789 } while (exception.retry);
6790 return err;
6791}
6792
b03d735b
CL		 6793/*
6794 * This operation also signals the server that this client is
6795 * performing migration recovery. The server can stop returning
6796 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6797 * appended to this compound to identify the client ID which is
6798 * performing recovery.
6799 */
6800static int _nfs40_proc_get_locations(struct inode *inode,
6801 struct nfs4_fs_locations *locations,
6802 struct page *page, struct rpc_cred *cred)
6803{
6804 struct nfs_server *server = NFS_SERVER(inode);
6805 struct rpc_clnt *clnt = server->client;
6806 u32 bitmask[2] = {
6807 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6808 };
6809 struct nfs4_fs_locations_arg args = {
6810 .clientid = server->nfs_client->cl_clientid,
6811 .fh = NFS_FH(inode),
6812 .page = page,
6813 .bitmask = bitmask,
6814 .migration = 1, /* skip LOOKUP */
6815 .renew = 1, /* append RENEW */
6816 };
6817 struct nfs4_fs_locations_res res = {
6818 .fs_locations = locations,
6819 .migration = 1,
6820 .renew = 1,
6821 };
6822 struct rpc_message msg = {
6823 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6824 .rpc_argp = &args,
6825 .rpc_resp = &res,
6826 .rpc_cred = cred,
6827 };
6828 unsigned long now = jiffies;
6829 int status;
6830
6831 nfs_fattr_init(&locations->fattr);
6832 locations->server = server;
6833 locations->nlocations = 0;
6834
6835 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6836 nfs4_set_sequence_privileged(&args.seq_args);
6837 status = nfs4_call_sync_sequence(clnt, server, &msg,
6838 &args.seq_args, &res.seq_res);
6839 if (status)
6840 return status;
6841
6842 renew_lease(server, now);
6843 return 0;
6844}
6845
6846#ifdef CONFIG_NFS_V4_1
6847
6848/*
6849 * This operation also signals the server that this client is
6850 * performing migration recovery. The server can stop asserting
6851 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6852 * performing this operation is identified in the SEQUENCE
6853 * operation in this compound.
6854 *
6855 * When the client supports GETATTR(fs_locations_info), it can
6856 * be plumbed in here.
6857 */
6858static int _nfs41_proc_get_locations(struct inode *inode,
6859 struct nfs4_fs_locations *locations,
6860 struct page *page, struct rpc_cred *cred)
6861{
6862 struct nfs_server *server = NFS_SERVER(inode);
6863 struct rpc_clnt *clnt = server->client;
6864 u32 bitmask[2] = {
6865 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6866 };
6867 struct nfs4_fs_locations_arg args = {
6868 .fh = NFS_FH(inode),
6869 .page = page,
6870 .bitmask = bitmask,
6871 .migration = 1, /* skip LOOKUP */
6872 };
6873 struct nfs4_fs_locations_res res = {
6874 .fs_locations = locations,
6875 .migration = 1,
6876 };
6877 struct rpc_message msg = {
6878 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6879 .rpc_argp = &args,
6880 .rpc_resp = &res,
6881 .rpc_cred = cred,
6882 };
6883 int status;
6884
6885 nfs_fattr_init(&locations->fattr);
6886 locations->server = server;
6887 locations->nlocations = 0;
6888
6889 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6890 nfs4_set_sequence_privileged(&args.seq_args);
6891 status = nfs4_call_sync_sequence(clnt, server, &msg,
6892 &args.seq_args, &res.seq_res);
6893 if (status == NFS4_OK &&
6894 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6895 status = -NFS4ERR_LEASE_MOVED;
6896 return status;
6897}
6898
6899#endif /* CONFIG_NFS_V4_1 */
6900
6901/**
6902 * nfs4_proc_get_locations - discover locations for a migrated FSID
6903 * @inode: inode on FSID that is migrating
6904 * @locations: result of query
6905 * @page: buffer
6906 * @cred: credential to use for this operation
6907 *
6908 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6909 * operation failed, or a negative errno if a local error occurred.
6910 *
6911 * On success, "locations" is filled in, but if the server has
6912 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6913 * asserted.
6914 *
6915 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6916 * from this client that require migration recovery.
6917 */
6918int nfs4_proc_get_locations(struct inode *inode,
6919 struct nfs4_fs_locations *locations,
6920 struct page *page, struct rpc_cred *cred)
6921{
6922 struct nfs_server *server = NFS_SERVER(inode);
6923 struct nfs_client *clp = server->nfs_client;
6924 const struct nfs4_mig_recovery_ops *ops =
6925 clp->cl_mvops->mig_recovery_ops;
6926 struct nfs4_exception exception = { };
6927 int status;
6928
6929 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6930 (unsigned long long)server->fsid.major,
6931 (unsigned long long)server->fsid.minor,
6932 clp->cl_hostname);
6933 nfs_display_fhandle(NFS_FH(inode), __func__);
6934
6935 do {
6936 status = ops->get_locations(inode, locations, page, cred);
6937 if (status != -NFS4ERR_DELAY)
6938 break;
6939 nfs4_handle_exception(server, status, &exception);
6940 } while (exception.retry);
6941 return status;
6942}
6943
44c99933
CL		 6944/*
6945 * This operation also signals the server that this client is
6946 * performing "lease moved" recovery. The server can stop
6947 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6948 * is appended to this compound to identify the client ID which is
6949 * performing recovery.
6950 */
6951static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6952{
6953 struct nfs_server *server = NFS_SERVER(inode);
6954 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6955 struct rpc_clnt *clnt = server->client;
6956 struct nfs4_fsid_present_arg args = {
6957 .fh = NFS_FH(inode),
6958 .clientid = clp->cl_clientid,
6959 .renew = 1, /* append RENEW */
6960 };
6961 struct nfs4_fsid_present_res res = {
6962 .renew = 1,
6963 };
6964 struct rpc_message msg = {
6965 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6966 .rpc_argp = &args,
6967 .rpc_resp = &res,
6968 .rpc_cred = cred,
6969 };
6970 unsigned long now = jiffies;
6971 int status;
6972
6973 res.fh = nfs_alloc_fhandle();
6974 if (res.fh == NULL)
6975 return -ENOMEM;
6976
6977 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6978 nfs4_set_sequence_privileged(&args.seq_args);
6979 status = nfs4_call_sync_sequence(clnt, server, &msg,
6980 &args.seq_args, &res.seq_res);
6981 nfs_free_fhandle(res.fh);
6982 if (status)
6983 return status;
6984
6985 do_renew_lease(clp, now);
6986 return 0;
6987}
6988
6989#ifdef CONFIG_NFS_V4_1
6990
6991/*
6992 * This operation also signals the server that this client is
6993 * performing "lease moved" recovery. The server can stop asserting
6994 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
6995 * this operation is identified in the SEQUENCE operation in this
6996 * compound.
6997 */
6998static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6999{
7000 struct nfs_server *server = NFS_SERVER(inode);
7001 struct rpc_clnt *clnt = server->client;
7002 struct nfs4_fsid_present_arg args = {
7003 .fh = NFS_FH(inode),
7004 };
7005 struct nfs4_fsid_present_res res = {
7006 };
7007 struct rpc_message msg = {
7008 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
7009 .rpc_argp = &args,
7010 .rpc_resp = &res,
7011 .rpc_cred = cred,
7012 };
7013 int status;
7014
7015 res.fh = nfs_alloc_fhandle();
7016 if (res.fh == NULL)
7017 return -ENOMEM;
7018
7019 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
7020 nfs4_set_sequence_privileged(&args.seq_args);
7021 status = nfs4_call_sync_sequence(clnt, server, &msg,
7022 &args.seq_args, &res.seq_res);
7023 nfs_free_fhandle(res.fh);
7024 if (status == NFS4_OK &&
7025 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
7026 status = -NFS4ERR_LEASE_MOVED;
7027 return status;
7028}
7029
7030#endif /* CONFIG_NFS_V4_1 */
7031
7032/**
7033 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
7034 * @inode: inode on FSID to check
7035 * @cred: credential to use for this operation
7036 *
7037 * Server indicates whether the FSID is present, moved, or not
7038 * recognized. This operation is necessary to clear a LEASE_MOVED
7039 * condition for this client ID.
7040 *
7041 * Returns NFS4_OK if the FSID is present on this server,
7042 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
7043 * NFS4ERR code if some error occurred on the server, or a
7044 * negative errno if a local failure occurred.
7045 */
7046int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
7047{
7048 struct nfs_server *server = NFS_SERVER(inode);
7049 struct nfs_client *clp = server->nfs_client;
7050 const struct nfs4_mig_recovery_ops *ops =
7051 clp->cl_mvops->mig_recovery_ops;
7052 struct nfs4_exception exception = { };
7053 int status;
7054
7055 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
7056 (unsigned long long)server->fsid.major,
7057 (unsigned long long)server->fsid.minor,
7058 clp->cl_hostname);
7059 nfs_display_fhandle(NFS_FH(inode), __func__);
7060
7061 do {
7062 status = ops->fsid_present(inode, cred);
7063 if (status != -NFS4ERR_DELAY)
7064 break;
7065 nfs4_handle_exception(server, status, &exception);
7066 } while (exception.retry);
7067 return status;
7068}
7069
5ec16a85 7070/**
a5250def
WAA		 7071 * If 'use_integrity' is true and the state managment nfs_client
7072 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
7073 * and the machine credential as per RFC3530bis and RFC5661 Security
7074 * Considerations sections. Otherwise, just use the user cred with the
7075 * filesystem's rpc_client.
5ec16a85 7076 */
a5250def 7077static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
5a5ea0d4
BS		 7078{
7079 int status;
7080 struct nfs4_secinfo_arg args = {
7081 .dir_fh = NFS_FH(dir),
7082 .name = name,
7083 };
7084 struct nfs4_secinfo_res res = {
7085 .flavors = flavors,
7086 };
7087 struct rpc_message msg = {
7088 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
7089 .rpc_argp = &args,
7090 .rpc_resp = &res,
7091 };
a5250def 7092 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
7cb852df 7093 struct rpc_cred *cred = NULL;
a5250def
WAA		 7094
7095 if (use_integrity) {
7096 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
7cb852df
WAA		 7097 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
7098 msg.rpc_cred = cred;
a5250def 7099 }
5a5ea0d4
BS		 7100
7101 dprintk("NFS call secinfo %s\n", name->name);
8b5bee2e
WAA		 7102
7103 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
7104 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
7105
a5250def
WAA		 7106 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
7107 &res.seq_res, 0);
5a5ea0d4 7108 dprintk("NFS reply secinfo: %d\n", status);
a5250def 7109
7cb852df
WAA		 7110 if (cred)
7111 put_rpccred(cred);
a5250def 7112
5a5ea0d4
BS		 7113 return status;
7114}
7115
72de53ec
BS		 7116int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
7117 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 7118{
7119 struct nfs4_exception exception = { };
7120 int err;
7121 do {
a5250def
WAA		 7122 err = -NFS4ERR_WRONGSEC;
7123
7124 /* try to use integrity protection with machine cred */
7125 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
7126 err = _nfs4_proc_secinfo(dir, name, flavors, true);
7127
7128 /*
7129 * if unable to use integrity protection, or SECINFO with
7130 * integrity protection returns NFS4ERR_WRONGSEC (which is
7131 * disallowed by spec, but exists in deployed servers) use
7132 * the current filesystem's rpc_client and the user cred.
7133 */
7134 if (err == -NFS4ERR_WRONGSEC)
7135 err = _nfs4_proc_secinfo(dir, name, flavors, false);
7136
078ea3df
TM		 7137 trace_nfs4_secinfo(dir, name, err);
7138 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5a5ea0d4
BS		 7139 &exception);
7140 } while (exception.retry);
7141 return err;
7142}
7143
557134a3 7144#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 7145/*
7146 * Check the exchange flags returned by the server for invalid flags, having
7147 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
7148 * DS flags set.
7149 */
7150static int nfs4_check_cl_exchange_flags(u32 flags)
7151{
7152 if (flags & ~EXCHGID4_FLAG_MASK_R)
7153 goto out_inval;
7154 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
7155 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
7156 goto out_inval;
7157 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
7158 goto out_inval;
7159 return NFS_OK;
7160out_inval:
7161 return -NFS4ERR_INVAL;
7162}
7163
78fe0f41 7164static bool
79d4e1f0
CL		 7165nfs41_same_server_scope(struct nfs41_server_scope *a,
7166 struct nfs41_server_scope *b)
78fe0f41 7167{
49ad0145
AS		 7168 if (a->server_scope_sz != b->server_scope_sz)
7169 return false;
7170 return memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0;
78fe0f41
WAA		 7171}
7172
02a95dee
AA		 7173static void
7174nfs4_bind_one_conn_to_session_done(struct rpc_task *task, void *calldata)
7175{
7176}
7177
7178static const struct rpc_call_ops nfs4_bind_one_conn_to_session_ops = {
7179 .rpc_call_done = &nfs4_bind_one_conn_to_session_done,
7180};
7181
7c44f1ae 7182/*
d9ddbf5d 7183 * nfs4_proc_bind_one_conn_to_session()
7c44f1ae
WAA		 7184 *
7185 * The 4.1 client currently uses the same TCP connection for the
7186 * fore and backchannel.
7187 */
d9ddbf5d
TM		 7188static
7189int nfs4_proc_bind_one_conn_to_session(struct rpc_clnt *clnt,
7190 struct rpc_xprt *xprt,
7191 struct nfs_client *clp,
7192 struct rpc_cred *cred)
7c44f1ae
WAA		 7193{
7194 int status;
71a097c6
TM		 7195 struct nfs41_bind_conn_to_session_args args = {
7196 .client = clp,
7197 .dir = NFS4_CDFC4_FORE_OR_BOTH,
7198 };
7c44f1ae
WAA		 7199 struct nfs41_bind_conn_to_session_res res;
7200 struct rpc_message msg = {
7201 .rpc_proc =
7202 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
71a097c6 7203 .rpc_argp = &args,
7c44f1ae 7204 .rpc_resp = &res,
2cf047c9 7205 .rpc_cred = cred,
7c44f1ae 7206 };
d9ddbf5d
TM		 7207 struct rpc_task_setup task_setup_data = {
7208 .rpc_client = clnt,
7209 .rpc_xprt = xprt,
02a95dee 7210 .callback_ops = &nfs4_bind_one_conn_to_session_ops,
d9ddbf5d
TM		 7211 .rpc_message = &msg,
7212 .flags = RPC_TASK_TIMEOUT,
7213 };
7214 struct rpc_task *task;
7c44f1ae 7215
71a097c6
TM		 7216 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id);
7217 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN))
7218 args.dir = NFS4_CDFC4_FORE;
7c44f1ae 7219
d9ddbf5d
TM		 7220 /* Do not set the backchannel flag unless this is clnt->cl_xprt */
7221 if (xprt != rcu_access_pointer(clnt->cl_xprt))
7222 args.dir = NFS4_CDFC4_FORE;
7223
7224 task = rpc_run_task(&task_setup_data);
7225 if (!IS_ERR(task)) {
7226 status = task->tk_status;
7227 rpc_put_task(task);
7228 } else
7229 status = PTR_ERR(task);
c6d01c6f 7230 trace_nfs4_bind_conn_to_session(clp, status);
7c44f1ae 7231 if (status == 0) {
71a097c6 7232 if (memcmp(res.sessionid.data,
7c44f1ae
WAA		 7233 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
7234 dprintk("NFS: %s: Session ID mismatch\n", __func__);
c7ae7639 7235 return -EIO;
7c44f1ae 7236 }
71a097c6 7237 if ((res.dir & args.dir) != res.dir || res.dir == 0) {
7c44f1ae
WAA		 7238 dprintk("NFS: %s: Unexpected direction from server\n",
7239 __func__);
c7ae7639 7240 return -EIO;
7c44f1ae 7241 }
71a097c6 7242 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) {
7c44f1ae
WAA		 7243 dprintk("NFS: %s: Server returned RDMA mode = true\n",
7244 __func__);
c7ae7639 7245 return -EIO;
7c44f1ae
WAA		 7246 }
7247 }
c7ae7639 7248
7c44f1ae
WAA		 7249 return status;
7250}
7251
d9ddbf5d
TM		 7252struct rpc_bind_conn_calldata {
7253 struct nfs_client *clp;
7254 struct rpc_cred *cred;
7255};
7256
7257static int
7258nfs4_proc_bind_conn_to_session_callback(struct rpc_clnt *clnt,
7259 struct rpc_xprt *xprt,
7260 void *calldata)
7261{
7262 struct rpc_bind_conn_calldata *p = calldata;
7263
7264 return nfs4_proc_bind_one_conn_to_session(clnt, xprt, p->clp, p->cred);
7265}
7266
7267int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7268{
7269 struct rpc_bind_conn_calldata data = {
7270 .clp = clp,
7271 .cred = cred,
7272 };
7273 return rpc_clnt_iterate_for_each_xprt(clp->cl_rpcclient,
7274 nfs4_proc_bind_conn_to_session_callback, &data);
7275}
7276
99fe60d0 7277/*
fa940720
WAA		 7278 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
7279 * and operations we'd like to see to enable certain features in the allow map
2031cd1a
WAA		 7280 */
7281static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
7282 .how = SP4_MACH_CRED,
7283 .enforce.u.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)
fa940720
WAA		 7289 },
7290 .allow.u.words = {
7291 [0] = 1 << (OP_CLOSE) |
99ade3c7 7292 1 << (OP_OPEN_DOWNGRADE) |
a0279625 7293 1 << (OP_LOCKU) |
99ade3c7 7294 1 << (OP_DELEGRETURN) |
a0279625 7295 1 << (OP_COMMIT),
8b5bee2e 7296 [1] = 1 << (OP_SECINFO - 32) |
3787d506 7297 1 << (OP_SECINFO_NO_NAME - 32) |
99ade3c7 7298 1 << (OP_LAYOUTRETURN - 32) |
3787d506 7299 1 << (OP_TEST_STATEID - 32) |
a0279625
WAA		 7300 1 << (OP_FREE_STATEID - 32) |
7301 1 << (OP_WRITE - 32)
2031cd1a
WAA		 7302 }
7303};
7304
7305/*
7306 * Select the state protection mode for client `clp' given the server results
7307 * from exchange_id in `sp'.
99fe60d0 7308 *
2031cd1a
WAA		 7309 * Returns 0 on success, negative errno otherwise.
7310 */
7311static int nfs4_sp4_select_mode(struct nfs_client *clp,
7312 struct nfs41_state_protection *sp)
7313{
7314 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
7315 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
7316 1 << (OP_EXCHANGE_ID - 32) |
7317 1 << (OP_CREATE_SESSION - 32) |
7318 1 << (OP_DESTROY_SESSION - 32) |
7319 1 << (OP_DESTROY_CLIENTID - 32)
7320 };
7321 unsigned int i;
7322
7323 if (sp->how == SP4_MACH_CRED) {
7324 /* Print state protect result */
7325 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
7326 for (i = 0; i <= LAST_NFS4_OP; i++) {
7327 if (test_bit(i, sp->enforce.u.longs))
7328 dfprintk(MOUNT, " enforce op %d\n", i);
7329 if (test_bit(i, sp->allow.u.longs))
7330 dfprintk(MOUNT, " allow op %d\n", i);
7331 }
7332
7333 /* make sure nothing is on enforce list that isn't supported */
7334 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
7335 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
7336 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
7337 return -EINVAL;
7338 }
7339 }
7340
7341 /*
7342 * Minimal mode - state operations are allowed to use machine
7343 * credential. Note this already happens by default, so the
7344 * client doesn't have to do anything more than the negotiation.
7345 *
7346 * NOTE: we don't care if EXCHANGE_ID is in the list -
7347 * we're already using the machine cred for exchange_id
7348 * and will never use a different cred.
7349 */
7350 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
7351 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
7352 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
7353 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
7354 dfprintk(MOUNT, "sp4_mach_cred:\n");
7355 dfprintk(MOUNT, " minimal mode enabled\n");
7356 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
7357 } else {
7358 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
7359 return -EINVAL;
7360 }
fa940720
WAA		 7361
7362 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
99ade3c7
AE		 7363 test_bit(OP_OPEN_DOWNGRADE, sp->allow.u.longs) &&
7364 test_bit(OP_DELEGRETURN, sp->allow.u.longs) &&
fa940720
WAA		 7365 test_bit(OP_LOCKU, sp->allow.u.longs)) {
7366 dfprintk(MOUNT, " cleanup mode enabled\n");
7367 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
7368 }
8b5bee2e 7369
99ade3c7
AE		 7370 if (test_bit(OP_LAYOUTRETURN, sp->allow.u.longs)) {
7371 dfprintk(MOUNT, " pnfs cleanup mode enabled\n");
7372 set_bit(NFS_SP4_MACH_CRED_PNFS_CLEANUP,
7373 &clp->cl_sp4_flags);
7374 }
7375
8b5bee2e
WAA		 7376 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
7377 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
7378 dfprintk(MOUNT, " secinfo mode enabled\n");
7379 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
7380 }
3787d506
WAA		 7381
7382 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
7383 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
7384 dfprintk(MOUNT, " stateid mode enabled\n");
7385 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
7386 }
8c21c62c
WAA		 7387
7388 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
7389 dfprintk(MOUNT, " write mode enabled\n");
7390 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
7391 }
7392
7393 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
7394 dfprintk(MOUNT, " commit mode enabled\n");
7395 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
7396 }
2031cd1a
WAA		 7397 }
7398
7399 return 0;
7400}
7401
8d89bd70
AA		 7402struct nfs41_exchange_id_data {
7403 struct nfs41_exchange_id_res res;
7404 struct nfs41_exchange_id_args args;
ad0849a7 7405 struct rpc_xprt *xprt;
8d89bd70
AA		 7406 int rpc_status;
7407};
7408
7409static void nfs4_exchange_id_done(struct rpc_task *task, void *data)
7410{
7411 struct nfs41_exchange_id_data *cdata =
7412 (struct nfs41_exchange_id_data *)data;
7413 struct nfs_client *clp = cdata->args.client;
7414 int status = task->tk_status;
7415
7416 trace_nfs4_exchange_id(clp, status);
7417
7418 if (status == 0)
7419 status = nfs4_check_cl_exchange_flags(cdata->res.flags);
ad0849a7
AA		 7420
7421 if (cdata->xprt && status == 0) {
7422 status = nfs4_detect_session_trunking(clp, &cdata->res,
7423 cdata->xprt);
7424 goto out;
7425 }
7426
8d89bd70
AA		 7427 if (status == 0)
7428 status = nfs4_sp4_select_mode(clp, &cdata->res.state_protect);
7429
7430 if (status == 0) {
7431 clp->cl_clientid = cdata->res.clientid;
7432 clp->cl_exchange_flags = cdata->res.flags;
838edb94 7433 clp->cl_seqid = cdata->res.seqid;
8d89bd70 7434 /* Client ID is not confirmed */
838edb94 7435 if (!(cdata->res.flags & EXCHGID4_FLAG_CONFIRMED_R))
8d89bd70 7436 clear_bit(NFS4_SESSION_ESTABLISHED,
838edb94 7437 &clp->cl_session->session_state);
8d89bd70
AA		 7438
7439 kfree(clp->cl_serverowner);
7440 clp->cl_serverowner = cdata->res.server_owner;
7441 cdata->res.server_owner = NULL;
7442
7443 /* use the most recent implementation id */
7444 kfree(clp->cl_implid);
7445 clp->cl_implid = cdata->res.impl_id;
7446 cdata->res.impl_id = NULL;
7447
7448 if (clp->cl_serverscope != NULL &&
7449 !nfs41_same_server_scope(clp->cl_serverscope,
7450 cdata->res.server_scope)) {
7451 dprintk("%s: server_scope mismatch detected\n",
7452 __func__);
7453 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
7454 kfree(clp->cl_serverscope);
7455 clp->cl_serverscope = NULL;
7456 }
7457
7458 if (clp->cl_serverscope == NULL) {
7459 clp->cl_serverscope = cdata->res.server_scope;
7460 cdata->res.server_scope = NULL;
7461 }
ad0849a7 7462 /* Save the EXCHANGE_ID verifier session trunk tests */
fd40559c 7463 memcpy(clp->cl_confirm.data, cdata->args.verifier.data,
ad0849a7 7464 sizeof(clp->cl_confirm.data));
8d89bd70 7465 }
ad0849a7 7466out:
8d89bd70 7467 cdata->rpc_status = status;
ad0849a7 7468 return;
8d89bd70
AA		 7469}
7470
7471static void nfs4_exchange_id_release(void *data)
7472{
7473 struct nfs41_exchange_id_data *cdata =
7474 (struct nfs41_exchange_id_data *)data;
7475
63513232 7476 nfs_put_client(cdata->args.client);
8d89bd70
AA		 7477 kfree(cdata->res.impl_id);
7478 kfree(cdata->res.server_scope);
7479 kfree(cdata->res.server_owner);
7480 kfree(cdata);
7481}
7482
7483static const struct rpc_call_ops nfs4_exchange_id_call_ops = {
7484 .rpc_call_done = nfs4_exchange_id_done,
7485 .rpc_release = nfs4_exchange_id_release,
7486};
7487
2031cd1a
WAA		 7488/*
7489 * _nfs4_proc_exchange_id()
6bbb4ae8 7490 *
2031cd1a 7491 * Wrapper for EXCHANGE_ID operation.
99fe60d0 7492 */
2031cd1a 7493static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
ad0849a7 7494 u32 sp4_how, struct rpc_xprt *xprt)
99fe60d0 7495{
99fe60d0
BH		 7496 struct rpc_message msg = {
7497 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
99fe60d0
BH		 7498 .rpc_cred = cred,
7499 };
8d89bd70
AA		 7500 struct rpc_task_setup task_setup_data = {
7501 .rpc_client = clp->cl_rpcclient,
7502 .callback_ops = &nfs4_exchange_id_call_ops,
7503 .rpc_message = &msg,
d9cb7330 7504 .flags = RPC_TASK_TIMEOUT,
8d89bd70
AA		 7505 };
7506 struct nfs41_exchange_id_data *calldata;
7507 struct rpc_task *task;
e917f0d1 7508 int status;
8d89bd70
AA		 7509
7510 if (!atomic_inc_not_zero(&clp->cl_count))
e917f0d1 7511 return -EIO;
8d89bd70 7512
8d89bd70 7513 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
5c737cb2
DW		 7514 if (!calldata) {
7515 nfs_put_client(clp);
e917f0d1 7516 return -ENOMEM;
5c737cb2 7517 }
99fe60d0 7518
fd40559c 7519 nfs4_init_boot_verifier(clp, &calldata->args.verifier);
873e3851
JL		 7520
7521 status = nfs4_init_uniform_client_string(clp);
7522 if (status)
8d89bd70 7523 goto out_calldata;
3a6bb738 7524
8d89bd70
AA		 7525 calldata->res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
7526 GFP_NOFS);
7527 status = -ENOMEM;
7528 if (unlikely(calldata->res.server_owner == NULL))
7529 goto out_calldata;
78fe0f41 7530
8d89bd70 7531 calldata->res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 7532 GFP_NOFS);
8d89bd70 7533 if (unlikely(calldata->res.server_scope == NULL))
acdeb69d 7534 goto out_server_owner;
78fe0f41 7535
8d89bd70
AA		 7536 calldata->res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
7537 if (unlikely(calldata->res.impl_id == NULL))
7d2ed9ac 7538 goto out_server_scope;
7d2ed9ac 7539
2031cd1a
WAA		 7540 switch (sp4_how) {
7541 case SP4_NONE:
8d89bd70 7542 calldata->args.state_protect.how = SP4_NONE;
2031cd1a
WAA		 7543 break;
7544
7545 case SP4_MACH_CRED:
8d89bd70 7546 calldata->args.state_protect = nfs4_sp4_mach_cred_request;
2031cd1a
WAA		 7547 break;
7548
7549 default:
7550 /* unsupported! */
7551 WARN_ON_ONCE(1);
7552 status = -EINVAL;
6b55970b 7553 goto out_impl_id;
2031cd1a 7554 }
ad0849a7
AA		 7555 if (xprt) {
7556 calldata->xprt = xprt;
7557 task_setup_data.rpc_xprt = xprt;
d9cb7330 7558 task_setup_data.flags |= RPC_TASK_SOFTCONN;
fd40559c
TM		 7559 memcpy(calldata->args.verifier.data, clp->cl_confirm.data,
7560 sizeof(calldata->args.verifier.data));
ad0849a7 7561 }
8d89bd70
AA		 7562 calldata->args.client = clp;
7563#ifdef CONFIG_NFS_V4_1_MIGRATION
7564 calldata->args.flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
7565 EXCHGID4_FLAG_BIND_PRINC_STATEID |
7566 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
7567#else
7568 calldata->args.flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
7569 EXCHGID4_FLAG_BIND_PRINC_STATEID,
7570#endif
7571 msg.rpc_argp = &calldata->args;
7572 msg.rpc_resp = &calldata->res;
7573 task_setup_data.callback_data = calldata;
2031cd1a 7574
8d89bd70 7575 task = rpc_run_task(&task_setup_data);
63513232
OK		 7576 if (IS_ERR(task))
7577 return PTR_ERR(task);
7d2ed9ac 7578
d9cb7330 7579 status = calldata->rpc_status;
ad0849a7 7580
8d89bd70 7581 rpc_put_task(task);
abe9a6d5 7582out:
99fe60d0 7583 return status;
8d89bd70
AA		 7584
7585out_impl_id:
7586 kfree(calldata->res.impl_id);
7587out_server_scope:
7588 kfree(calldata->res.server_scope);
7589out_server_owner:
7590 kfree(calldata->res.server_owner);
7591out_calldata:
7592 kfree(calldata);
63513232 7593 nfs_put_client(clp);
8d89bd70 7594 goto out;
99fe60d0
BH		 7595}
7596
2031cd1a
WAA		 7597/*
7598 * nfs4_proc_exchange_id()
7599 *
7600 * Returns zero, a negative errno, or a negative NFS4ERR status code.
7601 *
7602 * Since the clientid has expired, all compounds using sessions
7603 * associated with the stale clientid will be returning
7604 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
7605 * be in some phase of session reset.
7606 *
7607 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
7608 */
7609int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
7610{
7611 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
7612 int status;
7613
7614 /* try SP4_MACH_CRED if krb5i/p */
7615 if (authflavor == RPC_AUTH_GSS_KRB5I ||
7616 authflavor == RPC_AUTH_GSS_KRB5P) {
ad0849a7 7617 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED, NULL);
2031cd1a
WAA		 7618 if (!status)
7619 return 0;
7620 }
7621
7622 /* try SP4_NONE */
ad0849a7 7623 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE, NULL);
2031cd1a
WAA		 7624}
7625
04fa2c6b
AA		 7626/**
7627 * nfs4_test_session_trunk
7628 *
7629 * This is an add_xprt_test() test function called from
7630 * rpc_clnt_setup_test_and_add_xprt.
7631 *
7632 * The rpc_xprt_switch is referrenced by rpc_clnt_setup_test_and_add_xprt
7633 * and is dereferrenced in nfs4_exchange_id_release
7634 *
7635 * Upon success, add the new transport to the rpc_clnt
7636 *
7637 * @clnt: struct rpc_clnt to get new transport
7638 * @xprt: the rpc_xprt to test
7639 * @data: call data for _nfs4_proc_exchange_id.
7640 */
7641int nfs4_test_session_trunk(struct rpc_clnt *clnt, struct rpc_xprt *xprt,
7642 void *data)
7643{
7644 struct nfs4_add_xprt_data *adata = (struct nfs4_add_xprt_data *)data;
7645 u32 sp4_how;
7646
7647 dprintk("--> %s try %s\n", __func__,
7648 xprt->address_strings[RPC_DISPLAY_ADDR]);
7649
7650 sp4_how = (adata->clp->cl_sp4_flags == 0 ? SP4_NONE : SP4_MACH_CRED);
7651
7652 /* Test connection for session trunking. Async exchange_id call */
7653 return _nfs4_proc_exchange_id(adata->clp, adata->cred, sp4_how, xprt);
2031cd1a 7654}
04fa2c6b 7655EXPORT_SYMBOL_GPL(nfs4_test_session_trunk);
2031cd1a 7656
66245539
TM		 7657static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
7658 struct rpc_cred *cred)
7659{
7660 struct rpc_message msg = {
7661 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
7662 .rpc_argp = clp,
7663 .rpc_cred = cred,
7664 };
7665 int status;
7666
7667 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7668 trace_nfs4_destroy_clientid(clp, status);
66245539 7669 if (status)
02c67525 7670 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 7671 "DESTROY_CLIENTID.", status, clp->cl_hostname);
7672 return status;
7673}
7674
7675static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
7676 struct rpc_cred *cred)
7677{
7678 unsigned int loop;
7679 int ret;
7680
7681 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
7682 ret = _nfs4_proc_destroy_clientid(clp, cred);
7683 switch (ret) {
7684 case -NFS4ERR_DELAY:
7685 case -NFS4ERR_CLIENTID_BUSY:
7686 ssleep(1);
7687 break;
7688 default:
7689 return ret;
7690 }
7691 }
7692 return 0;
7693}
7694
7695int nfs4_destroy_clientid(struct nfs_client *clp)
7696{
7697 struct rpc_cred *cred;
7698 int ret = 0;
7699
7700 if (clp->cl_mvops->minor_version < 1)
7701 goto out;
7702 if (clp->cl_exchange_flags == 0)
7703 goto out;
05f4c350
CL		 7704 if (clp->cl_preserve_clid)
7705 goto out;
73d8bde5 7706 cred = nfs4_get_clid_cred(clp);
66245539
TM		 7707 ret = nfs4_proc_destroy_clientid(clp, cred);
7708 if (cred)
7709 put_rpccred(cred);
7710 switch (ret) {
7711 case 0:
7712 case -NFS4ERR_STALE_CLIENTID:
7713 clp->cl_exchange_flags = 0;
7714 }
7715out:
7716 return ret;
7717}
7718
2050f0cc
AA		 7719struct nfs4_get_lease_time_data {
7720 struct nfs4_get_lease_time_args *args;
7721 struct nfs4_get_lease_time_res *res;
7722 struct nfs_client *clp;
7723};
7724
7725static void nfs4_get_lease_time_prepare(struct rpc_task *task,
7726 void *calldata)
7727{
2050f0cc
AA		 7728 struct nfs4_get_lease_time_data *data =
7729 (struct nfs4_get_lease_time_data *)calldata;
7730
7731 dprintk("--> %s\n", __func__);
7732 /* just setup sequence, do not trigger session recovery
7733 since we're invoked within one */
7981c8a6 7734 nfs4_setup_sequence(data->clp,
d9afbd1b
TM		 7735 &data->args->la_seq_args,
7736 &data->res->lr_seq_res,
7737 task);
2050f0cc
AA		 7738 dprintk("<-- %s\n", __func__);
7739}
7740
7741/*
7742 * Called from nfs4_state_manager thread for session setup, so don't recover
7743 * from sequence operation or clientid errors.
7744 */
7745static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
7746{
7747 struct nfs4_get_lease_time_data *data =
7748 (struct nfs4_get_lease_time_data *)calldata;
7749
7750 dprintk("--> %s\n", __func__);
14516c3a
TM		 7751 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
7752 return;
2050f0cc
AA		 7753 switch (task->tk_status) {
7754 case -NFS4ERR_DELAY:
7755 case -NFS4ERR_GRACE:
7756 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
7757 rpc_delay(task, NFS4_POLL_RETRY_MIN);
7758 task->tk_status = 0;
a8a4ae3a
AA		 7759 /* fall through */
7760 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 7761 rpc_restart_call_prepare(task);
2050f0cc
AA		 7762 return;
7763 }
2050f0cc
AA		 7764 dprintk("<-- %s\n", __func__);
7765}
7766
17280175 7767static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 7768 .rpc_call_prepare = nfs4_get_lease_time_prepare,
7769 .rpc_call_done = nfs4_get_lease_time_done,
7770};
7771
7772int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
7773{
7774 struct rpc_task *task;
7775 struct nfs4_get_lease_time_args args;
7776 struct nfs4_get_lease_time_res res = {
7777 .lr_fsinfo = fsinfo,
7778 };
7779 struct nfs4_get_lease_time_data data = {
7780 .args = &args,
7781 .res = &res,
7782 .clp = clp,
7783 };
7784 struct rpc_message msg = {
7785 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
7786 .rpc_argp = &args,
7787 .rpc_resp = &res,
7788 };
7789 struct rpc_task_setup task_setup = {
7790 .rpc_client = clp->cl_rpcclient,
7791 .rpc_message = &msg,
7792 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 7793 .callback_data = &data,
7794 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 7795 };
7796 int status;
7797
a9c92d6b 7798 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 7799 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 7800 task = rpc_run_task(&task_setup);
7801
7802 if (IS_ERR(task))
f6148713 7803 return PTR_ERR(task);
2050f0cc 7804
f6148713
AS		 7805 status = task->tk_status;
7806 rpc_put_task(task);
2050f0cc
AA		 7807 return status;
7808}
7809
fc931582
AA		 7810/*
7811 * Initialize the values to be used by the client in CREATE_SESSION
7812 * If nfs4_init_session set the fore channel request and response sizes,
7813 * use them.
7814 *
7815 * Set the back channel max_resp_sz_cached to zero to force the client to
7816 * always set csa_cachethis to FALSE because the current implementation
7817 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
7818 */
6b26cc8c
CL		 7819static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args,
7820 struct rpc_clnt *clnt)
fc931582 7821{
18aad3d5 7822 unsigned int max_rqst_sz, max_resp_sz;
6b26cc8c 7823 unsigned int max_bc_payload = rpc_max_bc_payload(clnt);
18aad3d5
AA		 7824
7825 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
7826 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 7827
fc931582 7828 /* Fore channel attributes */
18aad3d5
AA		 7829 args->fc_attrs.max_rqst_sz = max_rqst_sz;
7830 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 7831 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 7832 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 7833
7834 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 7835 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 7836 __func__,
7837 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 7838 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 7839
7840 /* Back channel attributes */
6b26cc8c
CL		 7841 args->bc_attrs.max_rqst_sz = max_bc_payload;
7842 args->bc_attrs.max_resp_sz = max_bc_payload;
fc931582
AA		 7843 args->bc_attrs.max_resp_sz_cached = 0;
7844 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5405fc44 7845 args->bc_attrs.max_reqs = min_t(unsigned short, max_session_cb_slots, 1);
fc931582
AA		 7846
7847 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
7848 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
7849 __func__,
7850 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
7851 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
7852 args->bc_attrs.max_reqs);
7853}
7854
79969dd1
TM		 7855static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args,
7856 struct nfs41_create_session_res *res)
8d35301d 7857{
43c2e885 7858 struct nfs4_channel_attrs *sent = &args->fc_attrs;
79969dd1 7859 struct nfs4_channel_attrs *rcvd = &res->fc_attrs;
43c2e885 7860
43c2e885
BF		 7861 if (rcvd->max_resp_sz > sent->max_resp_sz)
7862 return -EINVAL;
7863 /*
7864 * Our requested max_ops is the minimum we need; we're not
7865 * prepared to break up compounds into smaller pieces than that.
7866 * So, no point even trying to continue if the server won't
7867 * cooperate:
7868 */
7869 if (rcvd->max_ops < sent->max_ops)
7870 return -EINVAL;
7871 if (rcvd->max_reqs == 0)
7872 return -EINVAL;
b4b9a0c1
VG		 7873 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
7874 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 7875 return 0;
8d35301d
AA		 7876}
7877
79969dd1
TM		 7878static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args,
7879 struct nfs41_create_session_res *res)
43c2e885
BF		 7880{
7881 struct nfs4_channel_attrs *sent = &args->bc_attrs;
79969dd1 7882 struct nfs4_channel_attrs *rcvd = &res->bc_attrs;
8d35301d 7883
b1c0df5f
TM		 7884 if (!(res->flags & SESSION4_BACK_CHAN))
7885 goto out;
43c2e885
BF		 7886 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
7887 return -EINVAL;
7888 if (rcvd->max_resp_sz < sent->max_resp_sz)
7889 return -EINVAL;
7890 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7891 return -EINVAL;
5405fc44 7892 if (rcvd->max_ops > sent->max_ops)
43c2e885 7893 return -EINVAL;
5405fc44 7894 if (rcvd->max_reqs > sent->max_reqs)
43c2e885 7895 return -EINVAL;
b1c0df5f 7896out:
43c2e885
BF		 7897 return 0;
7898}
8d35301d 7899
8d35301d 7900static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
79969dd1 7901 struct nfs41_create_session_res *res)
8d35301d 7902{
43c2e885 7903 int ret;
8d35301d 7904
79969dd1 7905 ret = nfs4_verify_fore_channel_attrs(args, res);
43c2e885
BF		 7906 if (ret)
7907 return ret;
79969dd1
TM		 7908 return nfs4_verify_back_channel_attrs(args, res);
7909}
7910
7911static void nfs4_update_session(struct nfs4_session *session,
7912 struct nfs41_create_session_res *res)
7913{
7914 nfs4_copy_sessionid(&session->sess_id, &res->sessionid);
e11259f9
TM		 7915 /* Mark client id and session as being confirmed */
7916 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;
7917 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state);
79969dd1
TM		 7918 session->flags = res->flags;
7919 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs));
b1c0df5f
TM		 7920 if (res->flags & SESSION4_BACK_CHAN)
7921 memcpy(&session->bc_attrs, &res->bc_attrs,
7922 sizeof(session->bc_attrs));
8d35301d
AA		 7923}
7924
848f5bda
TM		 7925static int _nfs4_proc_create_session(struct nfs_client *clp,
7926 struct rpc_cred *cred)
fc931582
AA		 7927{
7928 struct nfs4_session *session = clp->cl_session;
7929 struct nfs41_create_session_args args = {
7930 .client = clp,
79969dd1
TM		 7931 .clientid = clp->cl_clientid,
7932 .seqid = clp->cl_seqid,
fc931582
AA		 7933 .cb_program = NFS4_CALLBACK,
7934 };
79969dd1
TM		 7935 struct nfs41_create_session_res res;
7936
fc931582
AA		 7937 struct rpc_message msg = {
7938 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
7939 .rpc_argp = &args,
7940 .rpc_resp = &res,
848f5bda 7941 .rpc_cred = cred,
fc931582
AA		 7942 };
7943 int status;
7944
6b26cc8c 7945 nfs4_init_channel_attrs(&args, clp->cl_rpcclient);
0f91421e 7946 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 7947
1bd714f2 7948 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7949 trace_nfs4_create_session(clp, status);
fc931582 7950
b519d408
TM		 7951 switch (status) {
7952 case -NFS4ERR_STALE_CLIENTID:
7953 case -NFS4ERR_DELAY:
7954 case -ETIMEDOUT:
7955 case -EACCES:
7956 case -EAGAIN:
7957 goto out;
7958 };
7959
7960 clp->cl_seqid++;
43095d39 7961 if (!status) {
8d35301d 7962 /* Verify the session's negotiated channel_attrs values */
79969dd1 7963 status = nfs4_verify_channel_attrs(&args, &res);
fc931582 7964 /* Increment the clientid slot sequence id */
79969dd1
TM		 7965 if (status)
7966 goto out;
7967 nfs4_update_session(session, &res);
fc931582 7968 }
79969dd1 7969out:
fc931582
AA		 7970 return status;
7971}
7972
7973/*
7974 * Issues a CREATE_SESSION operation to the server.
7975 * It is the responsibility of the caller to verify the session is
7976 * expired before calling this routine.
7977 */
848f5bda 7978int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 7979{
7980 int status;
7981 unsigned *ptr;
fc931582
AA		 7982 struct nfs4_session *session = clp->cl_session;
7983
7984 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
7985
848f5bda 7986 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 7987 if (status)
7988 goto out;
7989
aacd5537
AA		 7990 /* Init or reset the session slot tables */
7991 status = nfs4_setup_session_slot_tables(session);
7992 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 7993 if (status)
7994 goto out;
7995
7996 ptr = (unsigned *)&session->sess_id.data[0];
7997 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
7998 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 7999out:
8000 dprintk("<-- %s\n", __func__);
8001 return status;
8002}
8003
0f3e66c6
AA		 8004/*
8005 * Issue the over-the-wire RPC DESTROY_SESSION.
8006 * The caller must serialize access to this routine.
8007 */
848f5bda
TM		 8008int nfs4_proc_destroy_session(struct nfs4_session *session,
8009 struct rpc_cred *cred)
0f3e66c6 8010{
848f5bda
TM		 8011 struct rpc_message msg = {
8012 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
8013 .rpc_argp = session,
8014 .rpc_cred = cred,
8015 };
0f3e66c6 8016 int status = 0;
0f3e66c6
AA		 8017
8018 dprintk("--> nfs4_proc_destroy_session\n");
8019
8020 /* session is still being setup */
e11259f9
TM		 8021 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state))
8022 return 0;
0f3e66c6 8023
1bd714f2 8024 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 8025 trace_nfs4_destroy_session(session->clp, status);
0f3e66c6
AA		 8026
8027 if (status)
08106ac7 8028 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 8029 "Session has been destroyed regardless...\n", status);
8030
8031 dprintk("<-- nfs4_proc_destroy_session\n");
8032 return status;
8033}
8034
fc01cea9
AA		 8035/*
8036 * Renew the cl_session lease.
8037 */
d5f8d3fe
TM		 8038struct nfs4_sequence_data {
8039 struct nfs_client *clp;
8040 struct nfs4_sequence_args args;
8041 struct nfs4_sequence_res res;
8042};
8043
dc96aef9
AB		 8044static void nfs41_sequence_release(void *data)
8045{
d5f8d3fe
TM		 8046 struct nfs4_sequence_data *calldata = data;
8047 struct nfs_client *clp = calldata->clp;
dc96aef9 8048
7135840f
AB		 8049 if (atomic_read(&clp->cl_count) > 1)
8050 nfs4_schedule_state_renewal(clp);
8051 nfs_put_client(clp);
d5f8d3fe 8052 kfree(calldata);
dc96aef9
AB		 8053}
8054
aa5190d0
TM		 8055static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
8056{
8057 switch(task->tk_status) {
8058 case -NFS4ERR_DELAY:
aa5190d0
TM		 8059 rpc_delay(task, NFS4_POLL_RETRY_MAX);
8060 return -EAGAIN;
8061 default:
0400a6b0 8062 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 8063 }
8064 return 0;
8065}
8066
dc96aef9 8067static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 8068{
d5f8d3fe
TM		 8069 struct nfs4_sequence_data *calldata = data;
8070 struct nfs_client *clp = calldata->clp;
fc01cea9 8071
14516c3a
TM		 8072 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
8073 return;
fc01cea9 8074
c6d01c6f 8075 trace_nfs4_sequence(clp, task->tk_status);
fc01cea9
AA		 8076 if (task->tk_status < 0) {
8077 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 8078 if (atomic_read(&clp->cl_count) == 1)
8079 goto out;
fc01cea9 8080
aa5190d0
TM		 8081 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
8082 rpc_restart_call_prepare(task);
fc01cea9
AA		 8083 return;
8084 }
8085 }
fc01cea9 8086 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 8087out:
fc01cea9
AA		 8088 dprintk("<-- %s\n", __func__);
8089}
8090
8091static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
8092{
d5f8d3fe
TM		 8093 struct nfs4_sequence_data *calldata = data;
8094 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 8095 struct nfs4_sequence_args *args;
8096 struct nfs4_sequence_res *res;
8097
fc01cea9
AA		 8098 args = task->tk_msg.rpc_argp;
8099 res = task->tk_msg.rpc_resp;
8100
7981c8a6 8101 nfs4_setup_sequence(clp, args, res, task);
fc01cea9
AA		 8102}
8103
8104static const struct rpc_call_ops nfs41_sequence_ops = {
8105 .rpc_call_done = nfs41_sequence_call_done,
8106 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 8107 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 8108};
8109
8fe72bac
TM		 8110static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
8111 struct rpc_cred *cred,
8112 bool is_privileged)
fc01cea9 8113{
d5f8d3fe 8114 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 8115 struct rpc_message msg = {
8116 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
8117 .rpc_cred = cred,
8118 };
71ac6da9
TM		 8119 struct rpc_task_setup task_setup_data = {
8120 .rpc_client = clp->cl_rpcclient,
8121 .rpc_message = &msg,
8fe72bac 8122 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 8123 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 8124 };
fc01cea9 8125
7135840f 8126 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 8127 return ERR_PTR(-EIO);
dfb4f309 8128 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 8129 if (calldata == NULL) {
7135840f 8130 nfs_put_client(clp);
71ac6da9 8131 return ERR_PTR(-ENOMEM);
fc01cea9 8132 }
a9c92d6b 8133 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 8134 if (is_privileged)
8135 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 8136 msg.rpc_argp = &calldata->args;
8137 msg.rpc_resp = &calldata->res;
8138 calldata->clp = clp;
71ac6da9 8139 task_setup_data.callback_data = calldata;
fc01cea9 8140
71ac6da9
TM		 8141 return rpc_run_task(&task_setup_data);
8142}
8143
2f60ea6b 8144static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 8145{
8146 struct rpc_task *task;
8147 int ret = 0;
8148
2f60ea6b 8149 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
d1f456b0 8150 return -EAGAIN;
8fe72bac 8151 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 8152 if (IS_ERR(task))
8153 ret = PTR_ERR(task);
8154 else
bf294b41 8155 rpc_put_task_async(task);
71ac6da9
TM		 8156 dprintk("<-- %s status=%d\n", __func__, ret);
8157 return ret;
8158}
8159
8160static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
8161{
8162 struct rpc_task *task;
8163 int ret;
8164
8fe72bac 8165 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 8166 if (IS_ERR(task)) {
8167 ret = PTR_ERR(task);
8168 goto out;
8169 }
8170 ret = rpc_wait_for_completion_task(task);
be824167 8171 if (!ret)
71ac6da9
TM		 8172 ret = task->tk_status;
8173 rpc_put_task(task);
8174out:
8175 dprintk("<-- %s status=%d\n", __func__, ret);
8176 return ret;
fc01cea9
AA		 8177}
8178
fce5c838
RL		 8179struct nfs4_reclaim_complete_data {
8180 struct nfs_client *clp;
8181 struct nfs41_reclaim_complete_args arg;
8182 struct nfs41_reclaim_complete_res res;
8183};
8184
8185static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
8186{
8187 struct nfs4_reclaim_complete_data *calldata = data;
8188
7981c8a6 8189 nfs4_setup_sequence(calldata->clp,
d9afbd1b
TM		 8190 &calldata->arg.seq_args,
8191 &calldata->res.seq_res,
8192 task);
fce5c838
RL		 8193}
8194
aa5190d0
TM		 8195static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
8196{
8197 switch(task->tk_status) {
8198 case 0:
8199 case -NFS4ERR_COMPLETE_ALREADY:
8200 case -NFS4ERR_WRONG_CRED: /* What to do here? */
8201 break;
8202 case -NFS4ERR_DELAY:
aa5190d0 8203 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 8204 /* fall through */
8205 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0 8206 return -EAGAIN;
0048fdd0
TM		 8207 case -NFS4ERR_BADSESSION:
8208 case -NFS4ERR_DEADSESSION:
8209 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
8210 nfs4_schedule_session_recovery(clp->cl_session,
8211 task->tk_status);
8212 break;
aa5190d0 8213 default:
0400a6b0 8214 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 8215 }
8216 return 0;
8217}
8218
fce5c838
RL		 8219static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
8220{
8221 struct nfs4_reclaim_complete_data *calldata = data;
8222 struct nfs_client *clp = calldata->clp;
8223 struct nfs4_sequence_res *res = &calldata->res.seq_res;
8224
8225 dprintk("--> %s\n", __func__);
14516c3a
TM		 8226 if (!nfs41_sequence_done(task, res))
8227 return;
fce5c838 8228
c6d01c6f 8229 trace_nfs4_reclaim_complete(clp, task->tk_status);
aa5190d0
TM		 8230 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
8231 rpc_restart_call_prepare(task);
8232 return;
8233 }
fce5c838
RL		 8234 dprintk("<-- %s\n", __func__);
8235}
8236
8237static void nfs4_free_reclaim_complete_data(void *data)
8238{
8239 struct nfs4_reclaim_complete_data *calldata = data;
8240
8241 kfree(calldata);
8242}
8243
8244static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
8245 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
8246 .rpc_call_done = nfs4_reclaim_complete_done,
8247 .rpc_release = nfs4_free_reclaim_complete_data,
8248};
8249
8250/*
8251 * Issue a global reclaim complete.
8252 */
965e9c23
TM		 8253static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
8254 struct rpc_cred *cred)
fce5c838
RL		 8255{
8256 struct nfs4_reclaim_complete_data *calldata;
8257 struct rpc_task *task;
8258 struct rpc_message msg = {
8259 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 8260 .rpc_cred = cred,
fce5c838
RL		 8261 };
8262 struct rpc_task_setup task_setup_data = {
8263 .rpc_client = clp->cl_rpcclient,
8264 .rpc_message = &msg,
8265 .callback_ops = &nfs4_reclaim_complete_call_ops,
8266 .flags = RPC_TASK_ASYNC,
8267 };
8268 int status = -ENOMEM;
8269
8270 dprintk("--> %s\n", __func__);
8535b2be 8271 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 8272 if (calldata == NULL)
8273 goto out;
8274 calldata->clp = clp;
8275 calldata->arg.one_fs = 0;
fce5c838 8276
a9c92d6b 8277 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 8278 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 8279 msg.rpc_argp = &calldata->arg;
8280 msg.rpc_resp = &calldata->res;
8281 task_setup_data.callback_data = calldata;
8282 task = rpc_run_task(&task_setup_data);
acf82b85 8283 if (IS_ERR(task)) {
fce5c838 8284 status = PTR_ERR(task);
acf82b85
DC		 8285 goto out;
8286 }
820bf85c 8287 status = rpc_wait_for_completion_task(task);
c34c32ea
AA		 8288 if (status == 0)
8289 status = task->tk_status;
fce5c838
RL		 8290 rpc_put_task(task);
8291out:
8292 dprintk("<-- %s status=%d\n", __func__, status);
8293 return status;
8294}
b1f69b75
AA		 8295
8296static void
8297nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
8298{
8299 struct nfs4_layoutget *lgp = calldata;
c31663d4 8300 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
b1f69b75
AA		 8301
8302 dprintk("--> %s\n", __func__);
7981c8a6 8303 nfs4_setup_sequence(server->nfs_client, &lgp->args.seq_args,
183d9e7b
JL		 8304 &lgp->res.seq_res, task);
8305 dprintk("<-- %s\n", __func__);
b1f69b75
AA		 8306}
8307
8308static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
8309{
8310 struct nfs4_layoutget *lgp = calldata;
183d9e7b
JL		 8311
8312 dprintk("--> %s\n", __func__);
2e80dbe7 8313 nfs41_sequence_process(task, &lgp->res.seq_res);
183d9e7b
JL		 8314 dprintk("<-- %s\n", __func__);
8315}
8316
8317static int
8318nfs4_layoutget_handle_exception(struct rpc_task *task,
8319 struct nfs4_layoutget *lgp, struct nfs4_exception *exception)
8320{
ee314c2a
TM		 8321 struct inode *inode = lgp->args.inode;
8322 struct nfs_server *server = NFS_SERVER(inode);
8323 struct pnfs_layout_hdr *lo;
e85d7ee4
TM		 8324 int nfs4err = task->tk_status;
8325 int err, status = 0;
f7db0b28 8326 LIST_HEAD(head);
b1f69b75 8327
ed7e5423 8328 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
b1f69b75 8329
e85d7ee4 8330 switch (nfs4err) {
b1f69b75 8331 case 0:
ee314c2a 8332 goto out;
7c1e6e58
PT		 8333
8334 /*
8335 * NFS4ERR_LAYOUTUNAVAILABLE means we are not supposed to use pnfs
8336 * on the file. set tk_status to -ENODATA to tell upper layer to
8337 * retry go inband.
8338 */
8339 case -NFS4ERR_LAYOUTUNAVAILABLE:
183d9e7b 8340 status = -ENODATA;
7c1e6e58 8341 goto out;
21b874c8
TM		 8342 /*
8343 * NFS4ERR_BADLAYOUT means the MDS cannot return a layout of
8344 * length lgp->args.minlength != 0 (see RFC5661 section 18.43.3).
8345 */
8346 case -NFS4ERR_BADLAYOUT:
183d9e7b
JL		 8347 status = -EOVERFLOW;
8348 goto out;
ed7e5423
BH		 8349 /*
8350 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
21b874c8
TM		 8351 * (or clients) writing to the same RAID stripe except when
8352 * the minlength argument is 0 (see RFC5661 section 18.43.3).
183d9e7b
JL		 8353 *
8354 * Treat it like we would RECALLCONFLICT -- we retry for a little
8355 * while, and then eventually give up.
ed7e5423 8356 */
b1f69b75 8357 case -NFS4ERR_LAYOUTTRYLATER:
183d9e7b
JL		 8358 if (lgp->args.minlength == 0) {
8359 status = -EOVERFLOW;
8360 goto out;
ed7e5423 8361 }
e85d7ee4
TM		 8362 status = -EBUSY;
8363 break;
183d9e7b 8364 case -NFS4ERR_RECALLCONFLICT:
183d9e7b 8365 status = -ERECALLCONFLICT;
e85d7ee4 8366 break;
26f47443
TM		 8367 case -NFS4ERR_DELEG_REVOKED:
8368 case -NFS4ERR_ADMIN_REVOKED:
ee314c2a
TM		 8369 case -NFS4ERR_EXPIRED:
8370 case -NFS4ERR_BAD_STATEID:
183d9e7b 8371 exception->timeout = 0;
ee314c2a 8372 spin_lock(&inode->i_lock);
f7db0b28
TM		 8373 lo = NFS_I(inode)->layout;
8374 /* If the open stateid was bad, then recover it. */
8375 if (!lo || test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) ||
8376 nfs4_stateid_match_other(&lgp->args.stateid,
2259f960 8377 &lgp->args.ctx->state->stateid)) {
ee314c2a 8378 spin_unlock(&inode->i_lock);
183d9e7b 8379 exception->state = lgp->args.ctx->state;
26f47443 8380 exception->stateid = &lgp->args.stateid;
2259f960
TM		 8381 break;
8382 }
f7db0b28
TM		 8383
8384 /*
8385 * Mark the bad layout state as invalid, then retry
8386 */
668f455d 8387 pnfs_mark_layout_stateid_invalid(lo, &head);
f7db0b28 8388 spin_unlock(&inode->i_lock);
1f18b82c 8389 nfs_commit_inode(inode, 0);
f7db0b28
TM		 8390 pnfs_free_lseg_list(&head);
8391 status = -EAGAIN;
8392 goto out;
b1f69b75 8393 }
183d9e7b 8394
8ac09251 8395 nfs4_sequence_free_slot(&lgp->res.seq_res);
e85d7ee4
TM		 8396 err = nfs4_handle_exception(server, nfs4err, exception);
8397 if (!status) {
8398 if (exception->retry)
8399 status = -EAGAIN;
8400 else
8401 status = err;
8402 }
ee314c2a 8403out:
b1f69b75 8404 dprintk("<-- %s\n", __func__);
183d9e7b 8405 return status;
b1f69b75
AA		 8406}
8407
8554116e
IK		 8408static size_t max_response_pages(struct nfs_server *server)
8409{
8410 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
8411 return nfs_page_array_len(0, max_resp_sz);
8412}
8413
8414static void nfs4_free_pages(struct page **pages, size_t size)
8415{
8416 int i;
8417
8418 if (!pages)
8419 return;
8420
8421 for (i = 0; i < size; i++) {
8422 if (!pages[i])
8423 break;
8424 __free_page(pages[i]);
8425 }
8426 kfree(pages);
8427}
8428
8429static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
8430{
8431 struct page **pages;
8432 int i;
8433
8434 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
8435 if (!pages) {
8436 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
8437 return NULL;
8438 }
8439
8440 for (i = 0; i < size; i++) {
8441 pages[i] = alloc_page(gfp_flags);
8442 if (!pages[i]) {
8443 dprintk("%s: failed to allocate page\n", __func__);
8444 nfs4_free_pages(pages, size);
8445 return NULL;
8446 }
8447 }
8448
8449 return pages;
8450}
8451
b1f69b75
AA		 8452static void nfs4_layoutget_release(void *calldata)
8453{
8454 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 8455 struct inode *inode = lgp->args.inode;
8456 struct nfs_server *server = NFS_SERVER(inode);
8554116e 8457 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 8458
8459 dprintk("--> %s\n", __func__);
bd171930 8460 nfs4_sequence_free_slot(&lgp->res.seq_res);
8554116e 8461 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 8462 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 8463 put_nfs_open_context(lgp->args.ctx);
8464 kfree(calldata);
8465 dprintk("<-- %s\n", __func__);
8466}
8467
8468static const struct rpc_call_ops nfs4_layoutget_call_ops = {
8469 .rpc_call_prepare = nfs4_layoutget_prepare,
8470 .rpc_call_done = nfs4_layoutget_done,
8471 .rpc_release = nfs4_layoutget_release,
8472};
8473
a0b0a6e3 8474struct pnfs_layout_segment *
183d9e7b 8475nfs4_proc_layoutget(struct nfs4_layoutget *lgp, long *timeout, gfp_t gfp_flags)
b1f69b75 8476{
a47970ff
WAA		 8477 struct inode *inode = lgp->args.inode;
8478 struct nfs_server *server = NFS_SERVER(inode);
8554116e 8479 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 8480 struct rpc_task *task;
8481 struct rpc_message msg = {
8482 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
8483 .rpc_argp = &lgp->args,
8484 .rpc_resp = &lgp->res,
6ab59344 8485 .rpc_cred = lgp->cred,
b1f69b75
AA		 8486 };
8487 struct rpc_task_setup task_setup_data = {
8488 .rpc_client = server->client,
8489 .rpc_message = &msg,
8490 .callback_ops = &nfs4_layoutget_call_ops,
8491 .callback_data = lgp,
8492 .flags = RPC_TASK_ASYNC,
8493 };
a0b0a6e3 8494 struct pnfs_layout_segment *lseg = NULL;
bc23676c
TM		 8495 struct nfs4_exception exception = {
8496 .inode = inode,
8497 .timeout = *timeout,
8498 };
b1f69b75
AA		 8499 int status = 0;
8500
8501 dprintk("--> %s\n", __func__);
8502
4bd5a980
PT		 8503 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
8504 pnfs_get_layout_hdr(NFS_I(inode)->layout);
8505
8554116e
IK		 8506 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
8507 if (!lgp->args.layout.pages) {
8508 nfs4_layoutget_release(lgp);
a0b0a6e3 8509 return ERR_PTR(-ENOMEM);
8554116e
IK		 8510 }
8511 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
8512
35124a09 8513 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 8514 lgp->res.seq_res.sr_slot = NULL;
a9c92d6b 8515 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff 8516
b1f69b75
AA		 8517 task = rpc_run_task(&task_setup_data);
8518 if (IS_ERR(task))
a0b0a6e3 8519 return ERR_CAST(task);
820bf85c 8520 status = rpc_wait_for_completion_task(task);
183d9e7b
JL		 8521 if (status == 0) {
8522 status = nfs4_layoutget_handle_exception(task, lgp, &exception);
8523 *timeout = exception.timeout;
8524 }
8525
1037e6ea
TM		 8526 trace_nfs4_layoutget(lgp->args.ctx,
8527 &lgp->args.range,
8528 &lgp->res.range,
48c9579a 8529 &lgp->res.stateid,
1037e6ea 8530 status);
183d9e7b 8531
085b7a45
WAA		 8532 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
8533 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 8534 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 8535 rpc_put_task(task);
8536 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 8537 if (status)
8538 return ERR_PTR(status);
8539 return lseg;
b1f69b75
AA		 8540}
8541
cbe82603
BH		 8542static void
8543nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
8544{
8545 struct nfs4_layoutreturn *lrp = calldata;
8546
8547 dprintk("--> %s\n", __func__);
7981c8a6 8548 nfs4_setup_sequence(lrp->clp,
d9afbd1b
TM		 8549 &lrp->args.seq_args,
8550 &lrp->res.seq_res,
8551 task);
cbe82603
BH		 8552}
8553
8554static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
8555{
8556 struct nfs4_layoutreturn *lrp = calldata;
8557 struct nfs_server *server;
8558
8559 dprintk("--> %s\n", __func__);
8560
2e80dbe7 8561 if (!nfs41_sequence_process(task, &lrp->res.seq_res))
cbe82603
BH		 8562 return;
8563
8564 server = NFS_SERVER(lrp->args.inode);
f22e5edd
TM		 8565 switch (task->tk_status) {
8566 default:
8567 task->tk_status = 0;
8568 case 0:
8569 break;
8570 case -NFS4ERR_DELAY:
8478eaa1 8571 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
f22e5edd 8572 break;
2e80dbe7 8573 nfs4_sequence_free_slot(&lrp->res.seq_res);
d00c5d43 8574 rpc_restart_call_prepare(task);
cbe82603
BH		 8575 return;
8576 }
cbe82603
BH		 8577 dprintk("<-- %s\n", __func__);
8578}
8579
8580static void nfs4_layoutreturn_release(void *calldata)
8581{
8582 struct nfs4_layoutreturn *lrp = calldata;
849b286f 8583 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 8584
8585 dprintk("--> %s\n", __func__);
2a974425 8586 pnfs_layoutreturn_free_lsegs(lo, &lrp->args.stateid, &lrp->args.range,
68f74479 8587 lrp->res.lrs_present ? &lrp->res.stateid : NULL);
2e80dbe7 8588 nfs4_sequence_free_slot(&lrp->res.seq_res);
4d796d75
TM		 8589 if (lrp->ld_private.ops && lrp->ld_private.ops->free)
8590 lrp->ld_private.ops->free(&lrp->ld_private);
2f065ddb
TM		 8591 pnfs_put_layout_hdr(lrp->args.layout);
8592 nfs_iput_and_deactive(lrp->inode);
cbe82603
BH		 8593 kfree(calldata);
8594 dprintk("<-- %s\n", __func__);
8595}
8596
8597static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
8598 .rpc_call_prepare = nfs4_layoutreturn_prepare,
8599 .rpc_call_done = nfs4_layoutreturn_done,
8600 .rpc_release = nfs4_layoutreturn_release,
8601};
8602
6c16605d 8603int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync)
cbe82603
BH		 8604{
8605 struct rpc_task *task;
8606 struct rpc_message msg = {
8607 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
8608 .rpc_argp = &lrp->args,
8609 .rpc_resp = &lrp->res,
9556000d 8610 .rpc_cred = lrp->cred,
cbe82603
BH		 8611 };
8612 struct rpc_task_setup task_setup_data = {
1771c577 8613 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
cbe82603
BH		 8614 .rpc_message = &msg,
8615 .callback_ops = &nfs4_layoutreturn_call_ops,
8616 .callback_data = lrp,
8617 };
6c16605d 8618 int status = 0;
cbe82603 8619
99ade3c7
AE		 8620 nfs4_state_protect(NFS_SERVER(lrp->args.inode)->nfs_client,
8621 NFS_SP4_MACH_CRED_PNFS_CLEANUP,
8622 &task_setup_data.rpc_client, &msg);
8623
cbe82603 8624 dprintk("--> %s\n", __func__);
5a0ec8ac
TM		 8625 if (!sync) {
8626 lrp->inode = nfs_igrab_and_active(lrp->args.inode);
8627 if (!lrp->inode) {
8628 nfs4_layoutreturn_release(lrp);
8629 return -EAGAIN;
8630 }
8631 task_setup_data.flags |= RPC_TASK_ASYNC;
8632 }
a9c92d6b 8633 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 8634 task = rpc_run_task(&task_setup_data);
8635 if (IS_ERR(task))
8636 return PTR_ERR(task);
5a0ec8ac
TM		 8637 if (sync)
8638 status = task->tk_status;
48c9579a 8639 trace_nfs4_layoutreturn(lrp->args.inode, &lrp->args.stateid, status);
cbe82603
BH		 8640 dprintk("<-- %s status=%d\n", __func__, status);
8641 rpc_put_task(task);
8642 return status;
8643}
8644
b1f69b75 8645static int
cd5875fe
TM		 8646_nfs4_proc_getdeviceinfo(struct nfs_server *server,
8647 struct pnfs_device *pdev,
8648 struct rpc_cred *cred)
b1f69b75
AA		 8649{
8650 struct nfs4_getdeviceinfo_args args = {
8651 .pdev = pdev,
4e590803
TM		 8652 .notify_types = NOTIFY_DEVICEID4_CHANGE |
8653 NOTIFY_DEVICEID4_DELETE,
b1f69b75
AA		 8654 };
8655 struct nfs4_getdeviceinfo_res res = {
8656 .pdev = pdev,
8657 };
8658 struct rpc_message msg = {
8659 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
8660 .rpc_argp = &args,
8661 .rpc_resp = &res,
cd5875fe 8662 .rpc_cred = cred,
b1f69b75
AA		 8663 };
8664 int status;
8665
8666 dprintk("--> %s\n", __func__);
7c513058 8667 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4e590803
TM		 8668 if (res.notification & ~args.notify_types)
8669 dprintk("%s: unsupported notification\n", __func__);
df52699e
TM		 8670 if (res.notification != args.notify_types)
8671 pdev->nocache = 1;
4e590803 8672
b1f69b75
AA		 8673 dprintk("<-- %s status=%d\n", __func__, status);
8674
8675 return status;
8676}
8677
cd5875fe
TM		 8678int nfs4_proc_getdeviceinfo(struct nfs_server *server,
8679 struct pnfs_device *pdev,
8680 struct rpc_cred *cred)
b1f69b75
AA		 8681{
8682 struct nfs4_exception exception = { };
8683 int err;
8684
8685 do {
8686 err = nfs4_handle_exception(server,
cd5875fe 8687 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 8688 &exception);
8689 } while (exception.retry);
8690 return err;
8691}
8692EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
8693
863a3c6c
AA		 8694static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
8695{
8696 struct nfs4_layoutcommit_data *data = calldata;
8697 struct nfs_server *server = NFS_SERVER(data->args.inode);
8698
7981c8a6 8699 nfs4_setup_sequence(server->nfs_client,
d9afbd1b
TM		 8700 &data->args.seq_args,
8701 &data->res.seq_res,
8702 task);
863a3c6c
AA		 8703}
8704
8705static void
8706nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
8707{
8708 struct nfs4_layoutcommit_data *data = calldata;
8709 struct nfs_server *server = NFS_SERVER(data->args.inode);
8710
6ba7db34 8711 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 8712 return;
8713
8714 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 8715 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
8716 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
8717 case -NFS4ERR_BADLAYOUT: /* no layout */
8718 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 8719 task->tk_status = 0;
e59d27e0 8720 case 0:
e59d27e0
TM		 8721 break;
8722 default:
8478eaa1 8723 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) {
e59d27e0
TM		 8724 rpc_restart_call_prepare(task);
8725 return;
8726 }
8727 }
863a3c6c
AA		 8728}
8729
8730static void nfs4_layoutcommit_release(void *calldata)
8731{
8732 struct nfs4_layoutcommit_data *data = calldata;
8733
db29c089 8734 pnfs_cleanup_layoutcommit(data);
d8c951c3
TM		 8735 nfs_post_op_update_inode_force_wcc(data->args.inode,
8736 data->res.fattr);
863a3c6c 8737 put_rpccred(data->cred);
472e2594 8738 nfs_iput_and_deactive(data->inode);
863a3c6c
AA		 8739 kfree(data);
8740}
8741
8742static const struct rpc_call_ops nfs4_layoutcommit_ops = {
8743 .rpc_call_prepare = nfs4_layoutcommit_prepare,
8744 .rpc_call_done = nfs4_layoutcommit_done,
8745 .rpc_release = nfs4_layoutcommit_release,
8746};
8747
8748int
ef311537 8749nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 8750{
8751 struct rpc_message msg = {
8752 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
8753 .rpc_argp = &data->args,
8754 .rpc_resp = &data->res,
8755 .rpc_cred = data->cred,
8756 };
8757 struct rpc_task_setup task_setup_data = {
8758 .task = &data->task,
8759 .rpc_client = NFS_CLIENT(data->args.inode),
8760 .rpc_message = &msg,
8761 .callback_ops = &nfs4_layoutcommit_ops,
8762 .callback_data = data,
863a3c6c
AA		 8763 };
8764 struct rpc_task *task;
8765 int status = 0;
8766
b4839ebe
KM		 8767 dprintk("NFS: initiating layoutcommit call. sync %d "
8768 "lbw: %llu inode %lu\n", sync,
863a3c6c
AA		 8769 data->args.lastbytewritten,
8770 data->args.inode->i_ino);
8771
472e2594
TM		 8772 if (!sync) {
8773 data->inode = nfs_igrab_and_active(data->args.inode);
8774 if (data->inode == NULL) {
8775 nfs4_layoutcommit_release(data);
8776 return -EAGAIN;
8777 }
8778 task_setup_data.flags = RPC_TASK_ASYNC;
8779 }
a9c92d6b 8780 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 8781 task = rpc_run_task(&task_setup_data);
8782 if (IS_ERR(task))
8783 return PTR_ERR(task);
472e2594
TM		 8784 if (sync)
8785 status = task->tk_status;
48c9579a 8786 trace_nfs4_layoutcommit(data->args.inode, &data->args.stateid, status);
863a3c6c
AA		 8787 dprintk("%s: status %d\n", __func__, status);
8788 rpc_put_task(task);
8789 return status;
8790}
fca78d6d 8791
97431204
AA		 8792/**
8793 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
8794 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
8795 */
fca78d6d
BS		 8796static int
8797_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
b1b3e136
WAA		 8798 struct nfs_fsinfo *info,
8799 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
fca78d6d
BS		 8800{
8801 struct nfs41_secinfo_no_name_args args = {
8802 .style = SECINFO_STYLE_CURRENT_FH,
8803 };
8804 struct nfs4_secinfo_res res = {
8805 .flavors = flavors,
8806 };
8807 struct rpc_message msg = {
8808 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
8809 .rpc_argp = &args,
8810 .rpc_resp = &res,
8811 };
b1b3e136 8812 struct rpc_clnt *clnt = server->client;
7cb852df 8813 struct rpc_cred *cred = NULL;
b1b3e136
WAA		 8814 int status;
8815
8816 if (use_integrity) {
8817 clnt = server->nfs_client->cl_rpcclient;
7cb852df
WAA		 8818 cred = nfs4_get_clid_cred(server->nfs_client);
8819 msg.rpc_cred = cred;
b1b3e136
WAA		 8820 }
8821
8822 dprintk("--> %s\n", __func__);
8823 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
8824 &res.seq_res, 0);
8825 dprintk("<-- %s status=%d\n", __func__, status);
8826
7cb852df
WAA		 8827 if (cred)
8828 put_rpccred(cred);
b1b3e136
WAA		 8829
8830 return status;
fca78d6d
BS		 8831}
8832
8833static int
8834nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8835 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
8836{
8837 struct nfs4_exception exception = { };
8838 int err;
8839 do {
b1b3e136
WAA		 8840 /* first try using integrity protection */
8841 err = -NFS4ERR_WRONGSEC;
8842
8843 /* try to use integrity protection with machine cred */
8844 if (_nfs4_is_integrity_protected(server->nfs_client))
8845 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8846 flavors, true);
8847
8848 /*
8849 * if unable to use integrity protection, or SECINFO with
8850 * integrity protection returns NFS4ERR_WRONGSEC (which is
8851 * disallowed by spec, but exists in deployed servers) use
8852 * the current filesystem's rpc_client and the user cred.
8853 */
8854 if (err == -NFS4ERR_WRONGSEC)
8855 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8856 flavors, false);
8857
fca78d6d
BS		 8858 switch (err) {
8859 case 0:
8860 case -NFS4ERR_WRONGSEC:
78b19bae 8861 case -ENOTSUPP:
05e9cfb4 8862 goto out;
fca78d6d
BS		 8863 default:
8864 err = nfs4_handle_exception(server, err, &exception);
8865 }
8866 } while (exception.retry);
05e9cfb4 8867out:
fca78d6d
BS		 8868 return err;
8869}
8870
8871static int
8872nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
8873 struct nfs_fsinfo *info)
8874{
8875 int err;
8876 struct page *page;
367156d9 8877 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
fca78d6d 8878 struct nfs4_secinfo_flavors *flavors;
58a8cf12
WAA		 8879 struct nfs4_secinfo4 *secinfo;
8880 int i;
fca78d6d
BS		 8881
8882 page = alloc_page(GFP_KERNEL);
8883 if (!page) {
8884 err = -ENOMEM;
8885 goto out;
8886 }
8887
8888 flavors = page_address(page);
8889 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
8890
8891 /*
8892 * Fall back on "guess and check" method if
8893 * the server doesn't support SECINFO_NO_NAME
8894 */
78b19bae 8895 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
fca78d6d
BS		 8896 err = nfs4_find_root_sec(server, fhandle, info);
8897 goto out_freepage;
8898 }
8899 if (err)
8900 goto out_freepage;
8901
58a8cf12
WAA		 8902 for (i = 0; i < flavors->num_flavors; i++) {
8903 secinfo = &flavors->flavors[i];
8904
8905 switch (secinfo->flavor) {
8906 case RPC_AUTH_NULL:
8907 case RPC_AUTH_UNIX:
8908 case RPC_AUTH_GSS:
8909 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
8910 &secinfo->flavor_info);
8911 break;
8912 default:
8913 flavor = RPC_AUTH_MAXFLAVOR;
8914 break;
8915 }
8916
4d4b69dd
WAA		 8917 if (!nfs_auth_info_match(&server->auth_info, flavor))
8918 flavor = RPC_AUTH_MAXFLAVOR;
8919
58a8cf12
WAA		 8920 if (flavor != RPC_AUTH_MAXFLAVOR) {
8921 err = nfs4_lookup_root_sec(server, fhandle,
8922 info, flavor);
8923 if (!err)
8924 break;
8925 }
8926 }
8927
8928 if (flavor == RPC_AUTH_MAXFLAVOR)
8929 err = -EPERM;
fca78d6d
BS		 8930
8931out_freepage:
8932 put_page(page);
8933 if (err == -EACCES)
8934 return -EPERM;
8935out:
8936 return err;
8937}
1cab0652 8938
ab7cb0df
TM		 8939static int _nfs41_test_stateid(struct nfs_server *server,
8940 nfs4_stateid *stateid,
8941 struct rpc_cred *cred)
7d974794
BS		 8942{
8943 int status;
8944 struct nfs41_test_stateid_args args = {
1cab0652 8945 .stateid = stateid,
7d974794
BS		 8946 };
8947 struct nfs41_test_stateid_res res;
8948 struct rpc_message msg = {
8949 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
8950 .rpc_argp = &args,
8951 .rpc_resp = &res,
ab7cb0df 8952 .rpc_cred = cred,
7d974794 8953 };
3787d506
WAA		 8954 struct rpc_clnt *rpc_client = server->client;
8955
8956 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8957 &rpc_client, &msg);
1cab0652 8958
38527b15 8959 dprintk("NFS call test_stateid %p\n", stateid);
a9c92d6b 8960 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 8961 nfs4_set_sequence_privileged(&args.seq_args);
3787d506 8962 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8fe72bac 8963 &args.seq_args, &res.seq_res);
38527b15
CL		 8964 if (status != NFS_OK) {
8965 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 8966 return status;
38527b15
CL		 8967 }
8968 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 8969 return -res.status;
7d974794
BS		 8970}
8971
43912bbb
TM		 8972static void nfs4_handle_delay_or_session_error(struct nfs_server *server,
8973 int err, struct nfs4_exception *exception)
8974{
8975 exception->retry = 0;
8976 switch(err) {
8977 case -NFS4ERR_DELAY:
76e8a1bd 8978 case -NFS4ERR_RETRY_UNCACHED_REP:
43912bbb
TM		 8979 nfs4_handle_exception(server, err, exception);
8980 break;
8981 case -NFS4ERR_BADSESSION:
8982 case -NFS4ERR_BADSLOT:
8983 case -NFS4ERR_BAD_HIGH_SLOT:
8984 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
8985 case -NFS4ERR_DEADSESSION:
8986 nfs4_do_handle_exception(server, err, exception);
8987 }
8988}
8989
38527b15
CL		 8990/**
8991 * nfs41_test_stateid - perform a TEST_STATEID operation
8992 *
8993 * @server: server / transport on which to perform the operation
8994 * @stateid: state ID to test
ab7cb0df 8995 * @cred: credential
38527b15
CL		 8996 *
8997 * Returns NFS_OK if the server recognizes that "stateid" is valid.
8998 * Otherwise a negative NFS4ERR value is returned if the operation
8999 * failed or the state ID is not currently valid.
9000 */
ab7cb0df
TM		 9001static int nfs41_test_stateid(struct nfs_server *server,
9002 nfs4_stateid *stateid,
9003 struct rpc_cred *cred)
7d974794
BS		 9004{
9005 struct nfs4_exception exception = { };
9006 int err;
9007 do {
ab7cb0df 9008 err = _nfs41_test_stateid(server, stateid, cred);
43912bbb 9009 nfs4_handle_delay_or_session_error(server, err, &exception);
7d974794
BS		 9010 } while (exception.retry);
9011 return err;
9012}
9aeda35f 9013
7c1d5fae
TM		 9014struct nfs_free_stateid_data {
9015 struct nfs_server *server;
9016 struct nfs41_free_stateid_args args;
9aeda35f 9017 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 9018};
9019
9020static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
9021{
9022 struct nfs_free_stateid_data *data = calldata;
7981c8a6 9023 nfs4_setup_sequence(data->server->nfs_client,
7c1d5fae
TM		 9024 &data->args.seq_args,
9025 &data->res.seq_res,
9026 task);
9027}
9028
9029static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
9030{
9031 struct nfs_free_stateid_data *data = calldata;
9032
9033 nfs41_sequence_done(task, &data->res.seq_res);
9034
9035 switch (task->tk_status) {
9036 case -NFS4ERR_DELAY:
8478eaa1 9037 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN)
7c1d5fae
TM		 9038 rpc_restart_call_prepare(task);
9039 }
9040}
9041
9042static void nfs41_free_stateid_release(void *calldata)
9043{
9044 kfree(calldata);
9045}
9046
17f26b12 9047static const struct rpc_call_ops nfs41_free_stateid_ops = {
7c1d5fae
TM		 9048 .rpc_call_prepare = nfs41_free_stateid_prepare,
9049 .rpc_call_done = nfs41_free_stateid_done,
9050 .rpc_release = nfs41_free_stateid_release,
9051};
9052
9053static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
f0b0bf88 9054 const nfs4_stateid *stateid,
ab7cb0df 9055 struct rpc_cred *cred,
7c1d5fae
TM		 9056 bool privileged)
9057{
9aeda35f
BS		 9058 struct rpc_message msg = {
9059 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 9060 .rpc_cred = cred,
9aeda35f 9061 };
7c1d5fae
TM		 9062 struct rpc_task_setup task_setup = {
9063 .rpc_client = server->client,
9064 .rpc_message = &msg,
9065 .callback_ops = &nfs41_free_stateid_ops,
9066 .flags = RPC_TASK_ASYNC,
9067 };
9068 struct nfs_free_stateid_data *data;
9aeda35f 9069
3787d506
WAA		 9070 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
9071 &task_setup.rpc_client, &msg);
9072
38527b15 9073 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 9074 data = kmalloc(sizeof(*data), GFP_NOFS);
9075 if (!data)
9076 return ERR_PTR(-ENOMEM);
9077 data->server = server;
9078 nfs4_stateid_copy(&data->args.stateid, stateid);
9079
9080 task_setup.callback_data = data;
9081
9082 msg.rpc_argp = &data->args;
9083 msg.rpc_resp = &data->res;
76e8a1bd 9084 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
7c1d5fae
TM		 9085 if (privileged)
9086 nfs4_set_sequence_privileged(&data->args.seq_args);
9087
9088 return rpc_run_task(&task_setup);
9aeda35f
BS		 9089}
9090
38527b15
CL		 9091/**
9092 * nfs41_free_stateid - perform a FREE_STATEID operation
9093 *
9094 * @server: server / transport on which to perform the operation
9095 * @stateid: state ID to release
ab7cb0df 9096 * @cred: credential
f0b0bf88 9097 * @is_recovery: set to true if this call needs to be privileged
38527b15 9098 *
f0b0bf88 9099 * Note: this function is always asynchronous.
38527b15 9100 */
ab7cb0df 9101static int nfs41_free_stateid(struct nfs_server *server,
f0b0bf88
TM		 9102 const nfs4_stateid *stateid,
9103 struct rpc_cred *cred,
9104 bool is_recovery)
9aeda35f 9105{
7c1d5fae 9106 struct rpc_task *task;
7c1d5fae 9107
f0b0bf88 9108 task = _nfs41_free_stateid(server, stateid, cred, is_recovery);
7c1d5fae
TM		 9109 if (IS_ERR(task))
9110 return PTR_ERR(task);
7c1d5fae 9111 rpc_put_task(task);
f0b0bf88 9112 return 0;
9aeda35f 9113}
36281caa 9114
f1cdae87
JL		 9115static void
9116nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
c8b2d0bf 9117{
ab7cb0df 9118 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 9119
f0b0bf88 9120 nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf 9121 nfs4_free_lock_state(server, lsp);
c8b2d0bf
TM		 9122}
9123
36281caa
TM		 9124static bool nfs41_match_stateid(const nfs4_stateid *s1,
9125 const nfs4_stateid *s2)
9126{
93b717fd
TM		 9127 if (s1->type != s2->type)
9128 return false;
9129
2d2f24ad 9130 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 9131 return false;
9132
2d2f24ad 9133 if (s1->seqid == s2->seqid)
36281caa 9134 return true;
36281caa 9135
045c5519 9136 return s1->seqid == 0 || s2->seqid == 0;
36281caa
TM		 9137}
9138
557134a3
AA		 9139#endif /* CONFIG_NFS_V4_1 */
9140
36281caa
TM		 9141static bool nfs4_match_stateid(const nfs4_stateid *s1,
9142 const nfs4_stateid *s2)
9143{
f597c537 9144 return nfs4_stateid_match(s1, s2);
36281caa
TM		 9145}
9146
9147
17280175 9148static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 9149 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 9150 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 9151 .recover_open = nfs4_open_reclaim,
9152 .recover_lock = nfs4_lock_reclaim,
591d71cb 9153 .establish_clid = nfs4_init_clientid,
05f4c350 9154 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 9155};
9156
591d71cb 9157#if defined(CONFIG_NFS_V4_1)
17280175 9158static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 9159 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
9160 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
9161 .recover_open = nfs4_open_reclaim,
9162 .recover_lock = nfs4_lock_reclaim,
4d643d1d 9163 .establish_clid = nfs41_init_clientid,
fce5c838 9164 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 9165 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 9166};
9167#endif /* CONFIG_NFS_V4_1 */
9168
17280175 9169static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 9170 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
9171 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
4dfd4f7a 9172 .recover_open = nfs40_open_expired,
591d71cb
AA		 9173 .recover_lock = nfs4_lock_expired,
9174 .establish_clid = nfs4_init_clientid,
9175};
9176
9177#if defined(CONFIG_NFS_V4_1)
17280175 9178static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 9179 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 9180 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 9181 .recover_open = nfs41_open_expired,
9182 .recover_lock = nfs41_lock_expired,
4d643d1d 9183 .establish_clid = nfs41_init_clientid,
1da177e4 9184};
591d71cb 9185#endif /* CONFIG_NFS_V4_1 */
1da177e4 9186
17280175 9187static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 9188 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 9189 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 9190 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 9191};
9192
9193#if defined(CONFIG_NFS_V4_1)
17280175 9194static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 9195 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 9196 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 9197 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 9198};
9199#endif
9200
ec011fe8 9201static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
b03d735b 9202 .get_locations = _nfs40_proc_get_locations,
44c99933 9203 .fsid_present = _nfs40_proc_fsid_present,
ec011fe8
CL		 9204};
9205
9206#if defined(CONFIG_NFS_V4_1)
9207static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
b03d735b 9208 .get_locations = _nfs41_proc_get_locations,
44c99933 9209 .fsid_present = _nfs41_proc_fsid_present,
ec011fe8
CL		 9210};
9211#endif /* CONFIG_NFS_V4_1 */
9212
97dc1359
TM		 9213static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
9214 .minor_version = 0,
39c6daae
TM		 9215 .init_caps = NFS_CAP_READDIRPLUS
9216 | NFS_CAP_ATOMIC_OPEN
39c6daae 9217 | NFS_CAP_POSIX_LOCK,
abf79bb3
CL		 9218 .init_client = nfs40_init_client,
9219 .shutdown_client = nfs40_shutdown_client,
36281caa 9220 .match_stateid = nfs4_match_stateid,
fca78d6d 9221 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 9222 .free_lock_state = nfs4_release_lockowner,
45870d69 9223 .test_and_free_expired = nfs40_test_and_free_expired_stateid,
63f5f796 9224 .alloc_seqid = nfs_alloc_seqid,
9915ea7e 9225 .call_sync_ops = &nfs40_call_sync_ops,
c48f4f35
TM		 9226 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
9227 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
9228 .state_renewal_ops = &nfs40_state_renewal_ops,
ec011fe8 9229 .mig_recovery_ops = &nfs40_mig_recovery_ops,
97dc1359
TM		 9230};
9231
9232#if defined(CONFIG_NFS_V4_1)
63f5f796
TM		 9233static struct nfs_seqid *
9234nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2)
9235{
9236 return NULL;
9237}
9238
97dc1359
TM		 9239static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
9240 .minor_version = 1,
39c6daae
TM		 9241 .init_caps = NFS_CAP_READDIRPLUS
9242 | NFS_CAP_ATOMIC_OPEN
3b66486c 9243 | NFS_CAP_POSIX_LOCK
49f9a0fa 9244 | NFS_CAP_STATEID_NFSV41
e983120e 9245 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 9246 .init_client = nfs41_init_client,
9247 .shutdown_client = nfs41_shutdown_client,
36281caa 9248 .match_stateid = nfs41_match_stateid,
fca78d6d 9249 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 9250 .free_lock_state = nfs41_free_lock_state,
45870d69 9251 .test_and_free_expired = nfs41_test_and_free_expired_stateid,
63f5f796 9252 .alloc_seqid = nfs_alloc_no_seqid,
04fa2c6b 9253 .session_trunk = nfs4_test_session_trunk,
9915ea7e 9254 .call_sync_ops = &nfs41_call_sync_ops,
c48f4f35
TM		 9255 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
9256 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
9257 .state_renewal_ops = &nfs41_state_renewal_ops,
ec011fe8 9258 .mig_recovery_ops = &nfs41_mig_recovery_ops,
97dc1359
TM		 9259};
9260#endif
9261
42c2c424
SD		 9262#if defined(CONFIG_NFS_V4_2)
9263static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
9264 .minor_version = 2,
7017310a
BS		 9265 .init_caps = NFS_CAP_READDIRPLUS
9266 | NFS_CAP_ATOMIC_OPEN
7017310a
BS		 9267 | NFS_CAP_POSIX_LOCK
9268 | NFS_CAP_STATEID_NFSV41
e983120e 9269 | NFS_CAP_ATOMIC_OPEN_V1
f4ac1674 9270 | NFS_CAP_ALLOCATE
2e72448b 9271 | NFS_CAP_COPY
624bd5b7 9272 | NFS_CAP_DEALLOCATE
6c5a0d89 9273 | NFS_CAP_SEEK
e5341f3a
PT		 9274 | NFS_CAP_LAYOUTSTATS
9275 | NFS_CAP_CLONE,
abf79bb3
CL		 9276 .init_client = nfs41_init_client,
9277 .shutdown_client = nfs41_shutdown_client,
42c2c424
SD		 9278 .match_stateid = nfs41_match_stateid,
9279 .find_root_sec = nfs41_find_root_sec,
7017310a 9280 .free_lock_state = nfs41_free_lock_state,
9915ea7e 9281 .call_sync_ops = &nfs41_call_sync_ops,
45870d69 9282 .test_and_free_expired = nfs41_test_and_free_expired_stateid,
63f5f796 9283 .alloc_seqid = nfs_alloc_no_seqid,
04fa2c6b 9284 .session_trunk = nfs4_test_session_trunk,
42c2c424
SD		 9285 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
9286 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
9287 .state_renewal_ops = &nfs41_state_renewal_ops,
18e3b739 9288 .mig_recovery_ops = &nfs41_mig_recovery_ops,
42c2c424
SD		 9289};
9290#endif
9291
97dc1359
TM		 9292const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
9293 [0] = &nfs_v4_0_minor_ops,
9294#if defined(CONFIG_NFS_V4_1)
9295 [1] = &nfs_v4_1_minor_ops,
9296#endif
42c2c424
SD		 9297#if defined(CONFIG_NFS_V4_2)
9298 [2] = &nfs_v4_2_minor_ops,
9299#endif
97dc1359
TM		 9300};
9301
13997823 9302static ssize_t nfs4_listxattr(struct dentry *dentry, char *list, size_t size)
c4803c49
AG		 9303{
9304 ssize_t error, error2;
9305
9306 error = generic_listxattr(dentry, list, size);
9307 if (error < 0)
9308 return error;
9309 if (list) {
9310 list += error;
9311 size -= error;
9312 }
9313
9314 error2 = nfs4_listxattr_nfs4_label(d_inode(dentry), list, size);
9315 if (error2 < 0)
9316 return error2;
9317 return error + error2;
9318}
9319
17f26b12 9320static const struct inode_operations nfs4_dir_inode_operations = {
73a79706
BS		 9321 .create = nfs_create,
9322 .lookup = nfs_lookup,
9323 .atomic_open = nfs_atomic_open,
9324 .link = nfs_link,
9325 .unlink = nfs_unlink,
9326 .symlink = nfs_symlink,
9327 .mkdir = nfs_mkdir,
9328 .rmdir = nfs_rmdir,
9329 .mknod = nfs_mknod,
9330 .rename = nfs_rename,
9331 .permission = nfs_permission,
9332 .getattr = nfs_getattr,
9333 .setattr = nfs_setattr,
c4803c49 9334 .listxattr = nfs4_listxattr,
73a79706
BS		 9335};
9336
92e1d5be 9337static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 9338 .permission = nfs_permission,
9339 .getattr = nfs_getattr,
9340 .setattr = nfs_setattr,
c4803c49 9341 .listxattr = nfs4_listxattr,
6b3b5496
BF		 9342};
9343
509de811 9344const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 9345 .version = 4, /* protocol version */
9346 .dentry_ops = &nfs4_dentry_operations,
9347 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 9348 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 9349 .file_ops = &nfs4_file_operations,
1da177e4 9350 .getroot = nfs4_proc_get_root,
281cad46 9351 .submount = nfs4_submount,
ff9099f2 9352 .try_mount = nfs4_try_mount,
1da177e4
LT		 9353 .getattr = nfs4_proc_getattr,
9354 .setattr = nfs4_proc_setattr,
9355 .lookup = nfs4_proc_lookup,
5b5faaf6 9356 .lookupp = nfs4_proc_lookupp,
1da177e4
LT		 9357 .access = nfs4_proc_access,
9358 .readlink = nfs4_proc_readlink,
1da177e4
LT		 9359 .create = nfs4_proc_create,
9360 .remove = nfs4_proc_remove,
9361 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 9362 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4 9363 .unlink_done = nfs4_proc_unlink_done,
d3d4152a 9364 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 9365 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 9366 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 9367 .link = nfs4_proc_link,
9368 .symlink = nfs4_proc_symlink,
9369 .mkdir = nfs4_proc_mkdir,
9370 .rmdir = nfs4_proc_remove,
9371 .readdir = nfs4_proc_readdir,
9372 .mknod = nfs4_proc_mknod,
9373 .statfs = nfs4_proc_statfs,
9374 .fsinfo = nfs4_proc_fsinfo,
9375 .pathconf = nfs4_proc_pathconf,
e9326dca 9376 .set_capabilities = nfs4_server_capabilities,
1da177e4 9377 .decode_dirent = nfs4_decode_dirent,
a4cdda59 9378 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
1da177e4 9379 .read_setup = nfs4_proc_read_setup,
ec06c096 9380 .read_done = nfs4_read_done,
1da177e4 9381 .write_setup = nfs4_proc_write_setup,
788e7a89 9382 .write_done = nfs4_write_done,
1da177e4 9383 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 9384 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 9385 .commit_done = nfs4_commit_done,
1da177e4 9386 .lock = nfs4_proc_lock,
e50a1c2e 9387 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 9388 .close_context = nfs4_close_context,
2b484297 9389 .open_context = nfs4_atomic_open,
011e2a7f 9390 .have_delegation = nfs4_have_delegation,
57ec14c5 9391 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 9392 .alloc_client = nfs4_alloc_client,
45a52a02 9393 .init_client = nfs4_init_client,
cdb7eced 9394 .free_client = nfs4_free_client,
1179acc6
BS		 9395 .create_server = nfs4_create_server,
9396 .clone_server = nfs_clone_server,
1da177e4
LT		 9397};
9398
64c2ce8b 9399static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
98e9cb57 9400 .name = XATTR_NAME_NFSV4_ACL,
64c2ce8b
AK		 9401 .list = nfs4_xattr_list_nfs4_acl,
9402 .get = nfs4_xattr_get_nfs4_acl,
9403 .set = nfs4_xattr_set_nfs4_acl,
9404};
9405
9406const struct xattr_handler *nfs4_xattr_handlers[] = {
9407 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 9408#ifdef CONFIG_NFS_V4_SECURITY_LABEL
9409 &nfs4_xattr_nfs4_label_handler,
9410#endif
64c2ce8b
AK		 9411 NULL
9412};
9413
1da177e4
LT		 9414/*
9415 * Local variables:
9416 * c-basic-offset: 8
9417 * End:
9418 */
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