projects / linux-2.6-block.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
NFS: add ca_source_server<> to COPY
[linux-2.6-block.git] / fs / nfs / nfs4proc.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
1da177e4
LT		 39#include <linux/delay.h>
40#include <linux/errno.h>
41#include <linux/string.h>
652f89f6
TM		 42#include <linux/ratelimit.h>
43#include <linux/printk.h>
5a0e3ad6 44#include <linux/slab.h>
1da177e4
LT		 45#include <linux/sunrpc/clnt.h>
46#include <linux/nfs.h>
47#include <linux/nfs4.h>
48#include <linux/nfs_fs.h>
49#include <linux/nfs_page.h>
9b7160c5 50#include <linux/nfs_mount.h>
1da177e4 51#include <linux/namei.h>
02a913a7 52#include <linux/mount.h>
99fe60d0 53#include <linux/module.h>
64c2ce8b 54#include <linux/xattr.h>
c7a360b0 55#include <linux/utsname.h>
d310310c 56#include <linux/freezer.h>
1eb5d98f 57#include <linux/iversion.h>
1da177e4 58
4ce79717 59#include "nfs4_fs.h"
1da177e4 60#include "delegation.h"
101070ca 61#include "internal.h"
006ea73e 62#include "iostat.h"
fc931582 63#include "callback.h"
b1f69b75 64#include "pnfs.h"
f092075d 65#include "netns.h"
40c64c26 66#include "nfs4idmap.h"
73e39aaa 67#include "nfs4session.h"
de242c0b 68#include "fscache.h"
1da177e4 69
c6d01c6f
TM		 70#include "nfs4trace.h"
71
1da177e4
LT		 72#define NFSDBG_FACILITY NFSDBG_PROC
73
30846df0
TM		 74#define NFS4_BITMASK_SZ 3
75
2066fe89 76#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 77#define NFS4_POLL_RETRY_MAX (15*HZ)
78
a1d1c4f1
TM		 79/* file attributes which can be mapped to nfs attributes */
80#define NFS4_VALID_ATTRS (ATTR_MODE \
81 | ATTR_UID \
82 | ATTR_GID \
83 | ATTR_SIZE \
84 | ATTR_ATIME \
85 | ATTR_MTIME \
86 | ATTR_CTIME \
87 | ATTR_ATIME_SET \
88 | ATTR_MTIME_SET)
89
cdd4e68b 90struct nfs4_opendata;
b257957e 91static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 92static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
81934ddb 93static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
a841b54d
TM		 94static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, struct nfs4_label *label, struct inode *inode);
95static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label, struct inode *inode);
a52458b4 96static int nfs4_do_setattr(struct inode *inode, const struct cred *cred,
0ab64e0e 97 struct nfs_fattr *fattr, struct iattr *sattr,
29b59f94 98 struct nfs_open_context *ctx, struct nfs4_label *ilabel,
1775fd3e 99 struct nfs4_label *olabel);
f062eb6c 100#ifdef CONFIG_NFS_V4_1
3be0f80b 101static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
a52458b4 102 const struct cred *cred,
3be0f80b
TM		 103 struct nfs4_slot *slot,
104 bool is_privileged);
ab7cb0df 105static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *,
a52458b4 106 const struct cred *);
f0b0bf88 107static int nfs41_free_stateid(struct nfs_server *, const nfs4_stateid *,
a52458b4 108 const struct cred *, bool);
f062eb6c 109#endif
aa9c2669
DQ		 110
111#ifdef CONFIG_NFS_V4_SECURITY_LABEL
112static inline struct nfs4_label *
113nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
114 struct iattr *sattr, struct nfs4_label *label)
115{
116 int err;
117
118 if (label == NULL)
119 return NULL;
120
121 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0)
122 return NULL;
123
aa9c2669
DQ		 124 err = security_dentry_init_security(dentry, sattr->ia_mode,
125 &dentry->d_name, (void **)&label->label, &label->len);
126 if (err == 0)
127 return label;
128
129 return NULL;
130}
131static inline void
132nfs4_label_release_security(struct nfs4_label *label)
133{
134 if (label)
135 security_release_secctx(label->label, label->len);
136}
137static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
138{
139 if (label)
140 return server->attr_bitmask;
141
142 return server->attr_bitmask_nl;
143}
144#else
145static inline struct nfs4_label *
146nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
147 struct iattr *sattr, struct nfs4_label *l)
148{ return NULL; }
149static inline void
150nfs4_label_release_security(struct nfs4_label *label)
151{ return; }
152static inline u32 *
153nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
154{ return server->attr_bitmask; }
155#endif
156
1da177e4 157/* Prevent leaks of NFSv4 errors into userland */
46f72f57 158static int nfs4_map_errors(int err)
1da177e4 159{
52567b03
TM		 160 if (err >= -1000)
161 return err;
162 switch (err) {
163 case -NFS4ERR_RESOURCE:
30005121
WAA		 164 case -NFS4ERR_LAYOUTTRYLATER:
165 case -NFS4ERR_RECALLCONFLICT:
52567b03 166 return -EREMOTEIO;
7ebb9315 167 case -NFS4ERR_WRONGSEC:
8897538e 168 case -NFS4ERR_WRONG_CRED:
7ebb9315 169 return -EPERM;
3ddeb7c5
TM		 170 case -NFS4ERR_BADOWNER:
171 case -NFS4ERR_BADNAME:
172 return -EINVAL;
fb13bfa7
TM		 173 case -NFS4ERR_SHARE_DENIED:
174 return -EACCES;
f25efd85
SD		 175 case -NFS4ERR_MINOR_VERS_MISMATCH:
176 return -EPROTONOSUPPORT;
6e3cf241
TM		 177 case -NFS4ERR_FILE_OPEN:
178 return -EBUSY;
52567b03 179 default:
1da177e4 180 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 181 __func__, -err);
52567b03 182 break;
1da177e4 183 }
52567b03 184 return -EIO;
1da177e4
LT		 185}
186
187/*
188 * This is our standard bitmap for GETATTR requests.
189 */
1549210f 190const u32 nfs4_fattr_bitmap[3] = {
1da177e4
LT		 191 FATTR4_WORD0_TYPE
192 | FATTR4_WORD0_CHANGE
193 | FATTR4_WORD0_SIZE
194 | FATTR4_WORD0_FSID
195 | FATTR4_WORD0_FILEID,
196 FATTR4_WORD1_MODE
197 | FATTR4_WORD1_NUMLINKS
198 | FATTR4_WORD1_OWNER
199 | FATTR4_WORD1_OWNER_GROUP
200 | FATTR4_WORD1_RAWDEV
201 | FATTR4_WORD1_SPACE_USED
202 | FATTR4_WORD1_TIME_ACCESS
203 | FATTR4_WORD1_TIME_METADATA
ea96d1ec
AS		 204 | FATTR4_WORD1_TIME_MODIFY
205 | FATTR4_WORD1_MOUNTED_ON_FILEID,
aa9c2669
DQ		 206#ifdef CONFIG_NFS_V4_SECURITY_LABEL
207 FATTR4_WORD2_SECURITY_LABEL
208#endif
1da177e4
LT		 209};
210
1549210f
TM		 211static const u32 nfs4_pnfs_open_bitmap[3] = {
212 FATTR4_WORD0_TYPE
213 | FATTR4_WORD0_CHANGE
214 | FATTR4_WORD0_SIZE
215 | FATTR4_WORD0_FSID
216 | FATTR4_WORD0_FILEID,
217 FATTR4_WORD1_MODE
218 | FATTR4_WORD1_NUMLINKS
219 | FATTR4_WORD1_OWNER
220 | FATTR4_WORD1_OWNER_GROUP
221 | FATTR4_WORD1_RAWDEV
222 | FATTR4_WORD1_SPACE_USED
223 | FATTR4_WORD1_TIME_ACCESS
224 | FATTR4_WORD1_TIME_METADATA
225 | FATTR4_WORD1_TIME_MODIFY,
226 FATTR4_WORD2_MDSTHRESHOLD
95864c91
TM		 227#ifdef CONFIG_NFS_V4_SECURITY_LABEL
228 | FATTR4_WORD2_SECURITY_LABEL
229#endif
1549210f
TM		 230};
231
e23008ec
AA		 232static const u32 nfs4_open_noattr_bitmap[3] = {
233 FATTR4_WORD0_TYPE
e23008ec
AA		 234 | FATTR4_WORD0_FILEID,
235};
236
a09df2ca 237const u32 nfs4_statfs_bitmap[3] = {
1da177e4
LT		 238 FATTR4_WORD0_FILES_AVAIL
239 | FATTR4_WORD0_FILES_FREE
240 | FATTR4_WORD0_FILES_TOTAL,
241 FATTR4_WORD1_SPACE_AVAIL
242 | FATTR4_WORD1_SPACE_FREE
243 | FATTR4_WORD1_SPACE_TOTAL
244};
245
a09df2ca 246const u32 nfs4_pathconf_bitmap[3] = {
1da177e4
LT		 247 FATTR4_WORD0_MAXLINK
248 | FATTR4_WORD0_MAXNAME,
249 0
250};
251
dae100c2 252const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
1da177e4
LT		 253 | FATTR4_WORD0_MAXREAD
254 | FATTR4_WORD0_MAXWRITE
255 | FATTR4_WORD0_LEASE_TIME,
55b6e774 256 FATTR4_WORD1_TIME_DELTA
dae100c2
FI		 257 | FATTR4_WORD1_FS_LAYOUT_TYPES,
258 FATTR4_WORD2_LAYOUT_BLKSIZE
2a92ee92 259 | FATTR4_WORD2_CLONE_BLKSIZE
1da177e4
LT		 260};
261
a09df2ca 262const u32 nfs4_fs_locations_bitmap[3] = {
c05cefcc 263 FATTR4_WORD0_CHANGE
830b8e33
MN		 264 | FATTR4_WORD0_SIZE
265 | FATTR4_WORD0_FSID
266 | FATTR4_WORD0_FILEID
267 | FATTR4_WORD0_FS_LOCATIONS,
c05cefcc 268 FATTR4_WORD1_OWNER
830b8e33
MN		 269 | FATTR4_WORD1_OWNER_GROUP
270 | FATTR4_WORD1_RAWDEV
271 | FATTR4_WORD1_SPACE_USED
272 | FATTR4_WORD1_TIME_ACCESS
273 | FATTR4_WORD1_TIME_METADATA
274 | FATTR4_WORD1_TIME_MODIFY
a09df2ca 275 | FATTR4_WORD1_MOUNTED_ON_FILEID,
830b8e33
MN		 276};
277
30846df0
TM		 278static void nfs4_bitmap_copy_adjust(__u32 *dst, const __u32 *src,
279 struct inode *inode)
280{
281 unsigned long cache_validity;
282
283 memcpy(dst, src, NFS4_BITMASK_SZ*sizeof(*dst));
284 if (!inode || !nfs4_have_delegation(inode, FMODE_READ))
285 return;
286
287 cache_validity = READ_ONCE(NFS_I(inode)->cache_validity);
288 if (!(cache_validity & NFS_INO_REVAL_FORCED))
289 cache_validity &= ~(NFS_INO_INVALID_CHANGE
290 | NFS_INO_INVALID_SIZE);
291
292 if (!(cache_validity & NFS_INO_INVALID_SIZE))
293 dst[0] &= ~FATTR4_WORD0_SIZE;
294
295 if (!(cache_validity & NFS_INO_INVALID_CHANGE))
296 dst[0] &= ~FATTR4_WORD0_CHANGE;
297}
298
299static void nfs4_bitmap_copy_adjust_setattr(__u32 *dst,
300 const __u32 *src, struct inode *inode)
301{
302 nfs4_bitmap_copy_adjust(dst, src, inode);
303}
304
bc4785cd 305static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 306 struct nfs4_readdir_arg *readdir)
307{
18fe6a23 308 unsigned int attrs = FATTR4_WORD0_FILEID | FATTR4_WORD0_TYPE;
0dbb4c67 309 __be32 *start, *p;
1da177e4 310
1da177e4 311 if (cookie > 2) {
b7ef1956 312 readdir->cookie = cookie;
1da177e4
LT		 313 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
314 return;
315 }
316
317 readdir->cookie = 0;
318 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
319 if (cookie == 2)
320 return;
321
322 /*
323 * NFSv4 servers do not return entries for '.' and '..'
324 * Therefore, we fake these entries here. We let '.'
325 * have cookie 0 and '..' have cookie 1. Note that
326 * when talking to the server, we always send cookie 0
327 * instead of 1 or 2.
328 */
2b86ce2d 329 start = p = kmap_atomic(*readdir->pages);
1da177e4
LT		 330
331 if (cookie == 0) {
332 *p++ = xdr_one; /* next */
333 *p++ = xdr_zero; /* cookie, first word */
334 *p++ = xdr_one; /* cookie, second word */
335 *p++ = xdr_one; /* entry len */
336 memcpy(p, ".\0\0\0", 4); /* entry */
337 p++;
338 *p++ = xdr_one; /* bitmap length */
18fe6a23
AS		 339 *p++ = htonl(attrs); /* bitmap */
340 *p++ = htonl(12); /* attribute buffer length */
341 *p++ = htonl(NF4DIR);
2b0143b5 342 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry)));
1da177e4
LT		 343 }
344
345 *p++ = xdr_one; /* next */
346 *p++ = xdr_zero; /* cookie, first word */
347 *p++ = xdr_two; /* cookie, second word */
348 *p++ = xdr_two; /* entry len */
349 memcpy(p, "..\0\0", 4); /* entry */
350 p++;
351 *p++ = xdr_one; /* bitmap length */
18fe6a23
AS		 352 *p++ = htonl(attrs); /* bitmap */
353 *p++ = htonl(12); /* attribute buffer length */
354 *p++ = htonl(NF4DIR);
2b0143b5 355 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry->d_parent)));
1da177e4
LT		 356
357 readdir->pgbase = (char *)p - (char *)start;
358 readdir->count -= readdir->pgbase;
2b86ce2d 359 kunmap_atomic(start);
1da177e4
LT		 360}
361
26d36301
TM		 362static void nfs4_test_and_free_stateid(struct nfs_server *server,
363 nfs4_stateid *stateid,
a52458b4 364 const struct cred *cred)
26d36301
TM		 365{
366 const struct nfs4_minor_version_ops *ops = server->nfs_client->cl_mvops;
367
368 ops->test_and_free_expired(server, stateid, cred);
369}
370
371static void __nfs4_free_revoked_stateid(struct nfs_server *server,
372 nfs4_stateid *stateid,
a52458b4 373 const struct cred *cred)
26d36301
TM		 374{
375 stateid->type = NFS4_REVOKED_STATEID_TYPE;
376 nfs4_test_and_free_stateid(server, stateid, cred);
377}
378
379static void nfs4_free_revoked_stateid(struct nfs_server *server,
380 const nfs4_stateid *stateid,
a52458b4 381 const struct cred *cred)
26d36301
TM		 382{
383 nfs4_stateid tmp;
384
385 nfs4_stateid_copy(&tmp, stateid);
386 __nfs4_free_revoked_stateid(server, &tmp, cred);
387}
388
8478eaa1
N		 389static long nfs4_update_delay(long *timeout)
390{
391 long ret;
392 if (!timeout)
393 return NFS4_POLL_RETRY_MAX;
394 if (*timeout <= 0)
395 *timeout = NFS4_POLL_RETRY_MIN;
396 if (*timeout > NFS4_POLL_RETRY_MAX)
397 *timeout = NFS4_POLL_RETRY_MAX;
398 ret = *timeout;
399 *timeout <<= 1;
400 return ret;
401}
402
0688e64b 403static int nfs4_delay_killable(long *timeout)
65de872e 404{
65de872e
TM		 405 might_sleep();
406
8478eaa1
N		 407 freezable_schedule_timeout_killable_unsafe(
408 nfs4_update_delay(timeout));
0688e64b
TM		 409 if (!__fatal_signal_pending(current))
410 return 0;
411 return -EINTR;
412}
413
414static int nfs4_delay_interruptible(long *timeout)
415{
416 might_sleep();
417
418 freezable_schedule_timeout_interruptible(nfs4_update_delay(timeout));
419 if (!signal_pending(current))
420 return 0;
421 return __fatal_signal_pending(current) ? -EINTR :-ERESTARTSYS;
422}
423
424static int nfs4_delay(long *timeout, bool interruptible)
425{
426 if (interruptible)
427 return nfs4_delay_interruptible(timeout);
428 return nfs4_delay_killable(timeout);
65de872e
TM		 429}
430
50c80007
TM		 431static const nfs4_stateid *
432nfs4_recoverable_stateid(const nfs4_stateid *stateid)
433{
434 if (!stateid)
435 return NULL;
436 switch (stateid->type) {
437 case NFS4_OPEN_STATEID_TYPE:
438 case NFS4_LOCK_STATEID_TYPE:
439 case NFS4_DELEGATION_STATEID_TYPE:
440 return stateid;
441 default:
442 break;
443 }
444 return NULL;
445}
446
65de872e
TM		 447/* This is the error handling routine for processes that are allowed
448 * to sleep.
449 */
b3c2aa07
TM		 450static int nfs4_do_handle_exception(struct nfs_server *server,
451 int errorcode, struct nfs4_exception *exception)
65de872e
TM		 452{
453 struct nfs_client *clp = server->nfs_client;
9e33bed5 454 struct nfs4_state *state = exception->state;
50c80007 455 const nfs4_stateid *stateid;
3114ea7a 456 struct inode *inode = exception->inode;
65de872e
TM		 457 int ret = errorcode;
458
b3c2aa07
TM		 459 exception->delay = 0;
460 exception->recovering = 0;
65de872e 461 exception->retry = 0;
272289a3 462
50c80007 463 stateid = nfs4_recoverable_stateid(exception->stateid);
272289a3 464 if (stateid == NULL && state != NULL)
50c80007 465 stateid = nfs4_recoverable_stateid(&state->stateid);
272289a3 466
65de872e
TM		 467 switch(errorcode) {
468 case 0:
469 return 0;
cf61eb26
TM		 470 case -NFS4ERR_BADHANDLE:
471 case -ESTALE:
472 if (inode != NULL && S_ISREG(inode->i_mode))
473 pnfs_destroy_layout(NFS_I(inode));
474 break;
5ba12443
TM		 475 case -NFS4ERR_DELEG_REVOKED:
476 case -NFS4ERR_ADMIN_REVOKED:
272289a3 477 case -NFS4ERR_EXPIRED:
5ba12443 478 case -NFS4ERR_BAD_STATEID:
272289a3
TM		 479 if (inode != NULL && stateid != NULL) {
480 nfs_inode_find_state_and_recover(inode,
481 stateid);
482 goto wait_on_recovery;
483 }
01e03bdc 484 /* Fall through */
272289a3 485 case -NFS4ERR_OPENMODE:
8487c479
TM		 486 if (inode) {
487 int err;
488
489 err = nfs_async_inode_return_delegation(inode,
490 stateid);
491 if (err == 0)
492 goto wait_on_recovery;
493 if (stateid != NULL && stateid->type == NFS4_DELEGATION_STATEID_TYPE) {
494 exception->retry = 1;
495 break;
496 }
497 }
3114ea7a
TM		 498 if (state == NULL)
499 break;
5d422301
TM		 500 ret = nfs4_schedule_stateid_recovery(server, state);
501 if (ret < 0)
502 break;
3114ea7a 503 goto wait_on_recovery;
65de872e 504 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 505 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 506 nfs4_schedule_lease_recovery(clp);
507 goto wait_on_recovery;
519ae255
CL		 508 case -NFS4ERR_MOVED:
509 ret = nfs4_schedule_migration_recovery(server);
510 if (ret < 0)
511 break;
512 goto wait_on_recovery;
8ef2f8d4
CL		 513 case -NFS4ERR_LEASE_MOVED:
514 nfs4_schedule_lease_moved_recovery(clp);
515 goto wait_on_recovery;
03391693 516#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 517 case -NFS4ERR_BADSESSION:
518 case -NFS4ERR_BADSLOT:
519 case -NFS4ERR_BAD_HIGH_SLOT:
520 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
521 case -NFS4ERR_DEADSESSION:
522 case -NFS4ERR_SEQ_FALSE_RETRY:
523 case -NFS4ERR_SEQ_MISORDERED:
524 dprintk("%s ERROR: %d Reset session\n", __func__,
525 errorcode);
9f594791 526 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
399f11c3 527 goto wait_on_recovery;
03391693 528#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 529 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 530 if (exception->timeout > HZ) {
531 /* We have retried a decent amount, time to
532 * fail
533 */
534 ret = -EBUSY;
535 break;
536 }
01e03bdc 537 /* Fall through */
65de872e 538 case -NFS4ERR_DELAY:
2598ed34 539 nfs_inc_server_stats(server, NFSIOS_DELAY);
01e03bdc 540 /* Fall through */
2598ed34 541 case -NFS4ERR_GRACE:
e85d7ee4 542 case -NFS4ERR_LAYOUTTRYLATER:
183d9e7b 543 case -NFS4ERR_RECALLCONFLICT:
b3c2aa07
TM		 544 exception->delay = 1;
545 return 0;
546
a8a4ae3a 547 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 548 case -NFS4ERR_OLD_STATEID:
549 exception->retry = 1;
b064eca2
TM		 550 break;
551 case -NFS4ERR_BADOWNER:
552 /* The following works around a Linux server bug! */
553 case -NFS4ERR_BADNAME:
554 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
555 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
556 exception->retry = 1;
557 printk(KERN_WARNING "NFS: v4 server %s "
558 "does not accept raw "
559 "uid/gids. "
560 "Reenabling the idmapper.\n",
561 server->nfs_client->cl_hostname);
562 }
65de872e
TM		 563 }
564 /* We failed to handle the error */
565 return nfs4_map_errors(ret);
0400a6b0 566wait_on_recovery:
b3c2aa07
TM		 567 exception->recovering = 1;
568 return 0;
569}
570
571/* This is the error handling routine for processes that are allowed
572 * to sleep.
573 */
574int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
575{
576 struct nfs_client *clp = server->nfs_client;
577 int ret;
578
579 ret = nfs4_do_handle_exception(server, errorcode, exception);
580 if (exception->delay) {
0688e64b
TM		 581 ret = nfs4_delay(&exception->timeout,
582 exception->interruptible);
b3c2aa07
TM		 583 goto out_retry;
584 }
585 if (exception->recovering) {
586 ret = nfs4_wait_clnt_recover(clp);
587 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
588 return -EIO;
589 goto out_retry;
590 }
591 return ret;
592out_retry:
a2c0b9e2
TM		 593 if (ret == 0)
594 exception->retry = 1;
595 return ret;
65de872e
TM		 596}
597
037fc980
TM		 598static int
599nfs4_async_handle_exception(struct rpc_task *task, struct nfs_server *server,
600 int errorcode, struct nfs4_exception *exception)
601{
602 struct nfs_client *clp = server->nfs_client;
603 int ret;
604
605 ret = nfs4_do_handle_exception(server, errorcode, exception);
606 if (exception->delay) {
607 rpc_delay(task, nfs4_update_delay(&exception->timeout));
608 goto out_retry;
609 }
610 if (exception->recovering) {
611 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
612 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
613 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
614 goto out_retry;
615 }
519ae255 616 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
037fc980
TM		 617 ret = -EIO;
618 return ret;
619out_retry:
0f90be13 620 if (ret == 0) {
a2c0b9e2 621 exception->retry = 1;
0f90be13
BB		 622 /*
623 * For NFS4ERR_MOVED, the client transport will need to
624 * be recomputed after migration recovery has completed.
625 */
626 if (errorcode == -NFS4ERR_MOVED)
627 rpc_task_release_transport(task);
628 }
a2c0b9e2 629 return ret;
65de872e
TM		 630}
631
0f913a57 632int
037fc980
TM		 633nfs4_async_handle_error(struct rpc_task *task, struct nfs_server *server,
634 struct nfs4_state *state, long *timeout)
635{
636 struct nfs4_exception exception = {
637 .state = state,
638 };
639
640 if (task->tk_status >= 0)
641 return 0;
642 if (timeout)
643 exception.timeout = *timeout;
644 task->tk_status = nfs4_async_handle_exception(task, server,
645 task->tk_status,
646 &exception);
647 if (exception.delay && timeout)
648 *timeout = exception.timeout;
649 if (exception.retry)
650 return -EAGAIN;
651 return 0;
652}
653
a5250def
WAA		 654/*
655 * Return 'true' if 'clp' is using an rpc_client that is integrity protected
656 * or 'false' otherwise.
657 */
658static bool _nfs4_is_integrity_protected(struct nfs_client *clp)
659{
660 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor;
eeea5361 661 return (flavor == RPC_AUTH_GSS_KRB5I) || (flavor == RPC_AUTH_GSS_KRB5P);
a5250def 662}
65de872e 663
452e9352 664static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 665{
1da177e4
LT		 666 spin_lock(&clp->cl_lock);
667 if (time_before(clp->cl_last_renewal,timestamp))
668 clp->cl_last_renewal = timestamp;
669 spin_unlock(&clp->cl_lock);
670}
671
452e9352
TM		 672static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
673{
be824167
TM		 674 struct nfs_client *clp = server->nfs_client;
675
676 if (!nfs4_has_session(clp))
677 do_renew_lease(clp, timestamp);
452e9352
TM		 678}
679
2a3eb2b9
CL		 680struct nfs4_call_sync_data {
681 const struct nfs_server *seq_server;
682 struct nfs4_sequence_args *seq_args;
683 struct nfs4_sequence_res *seq_res;
684};
685
be3a5d23 686void nfs4_init_sequence(struct nfs4_sequence_args *args,
fba83f34
AS		 687 struct nfs4_sequence_res *res, int cache_reply,
688 int privileged)
a9c92d6b
CL		 689{
690 args->sa_slot = NULL;
691 args->sa_cache_this = cache_reply;
fba83f34 692 args->sa_privileged = privileged;
a9c92d6b
CL		 693
694 res->sr_slot = NULL;
695}
696
2e80dbe7 697static void nfs40_sequence_free_slot(struct nfs4_sequence_res *res)
3bd2384a
CL		 698{
699 struct nfs4_slot *slot = res->sr_slot;
700 struct nfs4_slot_table *tbl;
701
3bd2384a
CL		 702 tbl = slot->table;
703 spin_lock(&tbl->slot_tbl_lock);
704 if (!nfs41_wake_and_assign_slot(tbl, slot))
705 nfs4_free_slot(tbl, slot);
706 spin_unlock(&tbl->slot_tbl_lock);
707
708 res->sr_slot = NULL;
2e80dbe7
TM		 709}
710
711static int nfs40_sequence_done(struct rpc_task *task,
712 struct nfs4_sequence_res *res)
713{
714 if (res->sr_slot != NULL)
715 nfs40_sequence_free_slot(res);
3bd2384a
CL		 716 return 1;
717}
718
cccef3b9
AA		 719#if defined(CONFIG_NFS_V4_1)
720
3be0f80b 721static void nfs41_release_slot(struct nfs4_slot *slot)
13615871 722{
e3725ec0 723 struct nfs4_session *session;
13615871 724 struct nfs4_slot_table *tbl;
c10e4498 725 bool send_new_highest_used_slotid = false;
13615871 726
3be0f80b
TM		 727 if (!slot)
728 return;
a13ce7c6 729 tbl = slot->table;
e3725ec0 730 session = tbl->session;
ea028ac9 731
07e8dcbd
TM		 732 /* Bump the slot sequence number */
733 if (slot->seq_done)
734 slot->seq_nr++;
735 slot->seq_done = 0;
736
35dc1d74 737 spin_lock(&tbl->slot_tbl_lock);
c10e4498
TM		 738 /* Be nice to the server: try to ensure that the last transmitted
739 * value for highest_user_slotid <= target_highest_slotid
740 */
741 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
742 send_new_highest_used_slotid = true;
743
a13ce7c6 744 if (nfs41_wake_and_assign_slot(tbl, slot)) {
b75ad4cd
TM		 745 send_new_highest_used_slotid = false;
746 goto out_unlock;
747 }
a13ce7c6 748 nfs4_free_slot(tbl, slot);
c10e4498
TM		 749
750 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
751 send_new_highest_used_slotid = false;
b75ad4cd 752out_unlock:
35dc1d74 753 spin_unlock(&tbl->slot_tbl_lock);
c10e4498 754 if (send_new_highest_used_slotid)
3f10a6af 755 nfs41_notify_server(session->clp);
045d2a6d
TM		 756 if (waitqueue_active(&tbl->slot_waitq))
757 wake_up_all(&tbl->slot_waitq);
13615871
AA		 758}
759
3be0f80b
TM		 760static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
761{
762 nfs41_release_slot(res->sr_slot);
763 res->sr_slot = NULL;
764}
765
3453d570
TM		 766static void nfs4_slot_sequence_record_sent(struct nfs4_slot *slot,
767 u32 seqnr)
768{
769 if ((s32)(seqnr - slot->seq_nr_highest_sent) > 0)
770 slot->seq_nr_highest_sent = seqnr;
771}
772static void nfs4_slot_sequence_acked(struct nfs4_slot *slot,
773 u32 seqnr)
774{
775 slot->seq_nr_highest_sent = seqnr;
776 slot->seq_nr_last_acked = seqnr;
777}
778
2e80dbe7
TM		 779static int nfs41_sequence_process(struct rpc_task *task,
780 struct nfs4_sequence_res *res)
b0df806c 781{
e3725ec0 782 struct nfs4_session *session;
a13ce7c6 783 struct nfs4_slot *slot = res->sr_slot;
14516c3a 784 struct nfs_client *clp;
85563073 785 int ret = 1;
b0df806c 786
a13ce7c6
TM		 787 if (slot == NULL)
788 goto out_noaction;
468f8613 789 /* don't increment the sequence number if the task wasn't sent */
c71c46f0 790 if (!RPC_WAS_SENT(task) || slot->seq_done)
b0df806c
AA		 791 goto out;
792
e3725ec0 793 session = slot->table->session;
933602e3 794
2f92ae34 795 trace_nfs4_sequence_done(session, res);
691daf3b 796 /* Check the SEQUENCE operation status */
14516c3a
TM		 797 switch (res->sr_status) {
798 case 0:
3453d570
TM		 799 /* Mark this sequence number as having been acked */
800 nfs4_slot_sequence_acked(slot, slot->seq_nr);
b0df806c 801 /* Update the slot's sequence and clientid lease timer */
07e8dcbd 802 slot->seq_done = 1;
e3725ec0 803 clp = session->clp;
8e63b6a8 804 do_renew_lease(clp, res->sr_timestamp);
0629e370 805 /* Check sequence flags */
0a014a44
TM		 806 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags,
807 !!slot->privileged);
464ee9f9 808 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a 809 break;
ac20d163
TM		 810 case 1:
811 /*
812 * sr_status remains 1 if an RPC level error occurred.
813 * The server may or may not have processed the sequence
814 * operation..
ac20d163 815 */
3453d570
TM		 816 nfs4_slot_sequence_record_sent(slot, slot->seq_nr);
817 slot->seq_done = 1;
ac20d163 818 goto out;
14516c3a
TM		 819 case -NFS4ERR_DELAY:
820 /* The server detected a resend of the RPC call and
821 * returned NFS4ERR_DELAY as per Section 2.10.6.2
822 * of RFC5661.
823 */
df2fabff 824 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 825 __func__,
df2fabff 826 slot->slot_nr,
933602e3 827 slot->seq_nr);
3453d570 828 nfs4_slot_sequence_acked(slot, slot->seq_nr);
14516c3a 829 goto out_retry;
f9312a54
TM		 830 case -NFS4ERR_RETRY_UNCACHED_REP:
831 case -NFS4ERR_SEQ_FALSE_RETRY:
832 /*
833 * The server thinks we tried to replay a request.
834 * Retry the call after bumping the sequence ID.
835 */
3453d570 836 nfs4_slot_sequence_acked(slot, slot->seq_nr);
f9312a54 837 goto retry_new_seq;
85563073
TM		 838 case -NFS4ERR_BADSLOT:
839 /*
840 * The slot id we used was probably retired. Try again
841 * using a different slot id.
842 */
99589100 843 if (slot->slot_nr < slot->table->target_highest_slotid)
3be0f80b 844 goto session_recover;
e8794440
TM		 845 goto retry_nowait;
846 case -NFS4ERR_SEQ_MISORDERED:
3453d570 847 nfs4_slot_sequence_record_sent(slot, slot->seq_nr);
ac20d163 848 /*
3453d570
TM		 849 * Were one or more calls using this slot interrupted?
850 * If the server never received the request, then our
851 * transmitted slot sequence number may be too high.
e8794440 852 */
3453d570
TM		 853 if ((s32)(slot->seq_nr - slot->seq_nr_last_acked) > 1) {
854 slot->seq_nr--;
8e63b6a8
TM		 855 goto retry_nowait;
856 }
3453d570
TM		 857 /*
858 * RFC5661:
859 * A retry might be sent while the original request is
860 * still in progress on the replier. The replier SHOULD
861 * deal with the issue by returning NFS4ERR_DELAY as the
862 * reply to SEQUENCE or CB_SEQUENCE operation, but
863 * implementations MAY return NFS4ERR_SEQ_MISORDERED.
864 *
865 * Restart the search after a delay.
866 */
867 slot->seq_nr = slot->seq_nr_highest_sent;
868 goto out_retry;
14516c3a
TM		 869 default:
870 /* Just update the slot sequence no. */
07e8dcbd 871 slot->seq_done = 1;
b0df806c
AA		 872 }
873out:
874 /* The session may be reset by one of the error handlers. */
875 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
a13ce7c6 876out_noaction:
85563073 877 return ret;
3be0f80b
TM		 878session_recover:
879 nfs4_schedule_session_recovery(session, res->sr_status);
880 goto retry_nowait;
881retry_new_seq:
882 ++slot->seq_nr;
e8794440
TM		 883retry_nowait:
884 if (rpc_restart_call_prepare(task)) {
2e80dbe7 885 nfs41_sequence_free_slot(res);
e8794440
TM		 886 task->tk_status = 0;
887 ret = 0;
888 }
889 goto out;
14516c3a 890out_retry:
d05dd4e9 891 if (!rpc_restart_call(task))
14516c3a
TM		 892 goto out;
893 rpc_delay(task, NFS4_POLL_RETRY_MAX);
894 return 0;
b0df806c 895}
2e80dbe7
TM		 896
897int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
898{
899 if (!nfs41_sequence_process(task, res))
900 return 0;
901 if (res->sr_slot != NULL)
902 nfs41_sequence_free_slot(res);
903 return 1;
904
905}
f9c96fcc 906EXPORT_SYMBOL_GPL(nfs41_sequence_done);
b0df806c 907
2e80dbe7
TM		 908static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res)
909{
910 if (res->sr_slot == NULL)
911 return 1;
912 if (res->sr_slot->table->session != NULL)
913 return nfs41_sequence_process(task, res);
914 return nfs40_sequence_done(task, res);
915}
916
917static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res)
918{
919 if (res->sr_slot != NULL) {
920 if (res->sr_slot->table->session != NULL)
921 nfs41_sequence_free_slot(res);
922 else
923 nfs40_sequence_free_slot(res);
924 }
925}
926
2c4b131d 927int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
df896455 928{
e3725ec0 929 if (res->sr_slot == NULL)
14516c3a 930 return 1;
3bd2384a
CL		 931 if (!res->sr_slot->table->session)
932 return nfs40_sequence_done(task, res);
14516c3a 933 return nfs41_sequence_done(task, res);
df896455 934}
2c4b131d 935EXPORT_SYMBOL_GPL(nfs4_sequence_done);
df896455 936
ce5039c1
AA		 937static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
938{
2a3eb2b9 939 struct nfs4_call_sync_data *data = calldata;
ce5039c1 940
035168ab
TM		 941 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
942
7981c8a6
AS		 943 nfs4_setup_sequence(data->seq_server->nfs_client,
944 data->seq_args, data->seq_res, task);
ce5039c1
AA		 945}
946
69ab40c4
AA		 947static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
948{
2a3eb2b9 949 struct nfs4_call_sync_data *data = calldata;
69ab40c4 950
14516c3a 951 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 952}
953
17280175 954static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 955 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 956 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 957};
958
3bd2384a
CL		 959#else /* !CONFIG_NFS_V4_1 */
960
2e80dbe7
TM		 961static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res)
962{
963 return nfs40_sequence_done(task, res);
964}
965
966static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res)
967{
968 if (res->sr_slot != NULL)
969 nfs40_sequence_free_slot(res);
970}
971
2c4b131d
PT		 972int nfs4_sequence_done(struct rpc_task *task,
973 struct nfs4_sequence_res *res)
9915ea7e 974{
3bd2384a 975 return nfs40_sequence_done(task, res);
9915ea7e 976}
2c4b131d 977EXPORT_SYMBOL_GPL(nfs4_sequence_done);
3bd2384a
CL		 978
979#endif /* !CONFIG_NFS_V4_1 */
9915ea7e 980
c1dffe0b
TM		 981static void nfs41_sequence_res_init(struct nfs4_sequence_res *res)
982{
983 res->sr_timestamp = jiffies;
984 res->sr_status_flags = 0;
985 res->sr_status = 1;
986}
987
3be0f80b
TM		 988static
989void nfs4_sequence_attach_slot(struct nfs4_sequence_args *args,
990 struct nfs4_sequence_res *res,
991 struct nfs4_slot *slot)
992{
993 if (!slot)
994 return;
995 slot->privileged = args->sa_privileged ? 1 : 0;
996 args->sa_slot = slot;
997
998 res->sr_slot = slot;
3be0f80b
TM		 999}
1000
1001int nfs4_setup_sequence(struct nfs_client *client,
7981c8a6
AS		 1002 struct nfs4_sequence_args *args,
1003 struct nfs4_sequence_res *res,
1004 struct rpc_task *task)
1005{
7981c8a6 1006 struct nfs4_session *session = nfs4_get_session(client);
76ee0354 1007 struct nfs4_slot_table *tbl = client->cl_slot_tbl;
3d35808b 1008 struct nfs4_slot *slot;
7981c8a6 1009
9dd9107f
AS		 1010 /* slot already allocated? */
1011 if (res->sr_slot != NULL)
1012 goto out_start;
1013
6b2e6856 1014 if (session)
76ee0354 1015 tbl = &session->fc_slot_table;
76ee0354 1016
3453d570
TM		 1017 spin_lock(&tbl->slot_tbl_lock);
1018 /* The state manager will wait until the slot table is empty */
1019 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
1020 goto out_sleep;
1021
1022 slot = nfs4_alloc_slot(tbl);
1023 if (IS_ERR(slot)) {
3453d570 1024 if (slot == ERR_PTR(-ENOMEM))
6b2e6856 1025 goto out_sleep_timeout;
3453d570 1026 goto out_sleep;
3d35808b 1027 }
3453d570 1028 spin_unlock(&tbl->slot_tbl_lock);
3d35808b 1029
3be0f80b 1030 nfs4_sequence_attach_slot(args, res, slot);
3d35808b 1031
ad05cc0f 1032 trace_nfs4_setup_sequence(session, args);
9dd9107f 1033out_start:
c1dffe0b 1034 nfs41_sequence_res_init(res);
9dd9107f
AS		 1035 rpc_call_start(task);
1036 return 0;
6b2e6856
TM		 1037out_sleep_timeout:
1038 /* Try again in 1/4 second */
1039 if (args->sa_privileged)
1040 rpc_sleep_on_priority_timeout(&tbl->slot_tbl_waitq, task,
1041 jiffies + (HZ >> 2), RPC_PRIORITY_PRIVILEGED);
1042 else
1043 rpc_sleep_on_timeout(&tbl->slot_tbl_waitq, task,
1044 NULL, jiffies + (HZ >> 2));
1045 spin_unlock(&tbl->slot_tbl_lock);
1046 return -EAGAIN;
0dcee8bb
AS		 1047out_sleep:
1048 if (args->sa_privileged)
1049 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
8357a9b6 1050 RPC_PRIORITY_PRIVILEGED);
0dcee8bb
AS		 1051 else
1052 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
1053 spin_unlock(&tbl->slot_tbl_lock);
1054 return -EAGAIN;
7981c8a6
AS		 1055}
1056EXPORT_SYMBOL_GPL(nfs4_setup_sequence);
1057
9915ea7e
CL		 1058static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
1059{
1060 struct nfs4_call_sync_data *data = calldata;
42e1cca7 1061 nfs4_setup_sequence(data->seq_server->nfs_client,
9915ea7e
CL		 1062 data->seq_args, data->seq_res, task);
1063}
1064
1065static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
1066{
1067 struct nfs4_call_sync_data *data = calldata;
1068 nfs4_sequence_done(task, data->seq_res);
1069}
1070
1071static const struct rpc_call_ops nfs40_call_sync_ops = {
1072 .rpc_call_prepare = nfs40_call_sync_prepare,
1073 .rpc_call_done = nfs40_call_sync_done,
1074};
1075
48c05854
AS		 1076static int nfs4_call_sync_custom(struct rpc_task_setup *task_setup)
1077{
1078 int ret;
1079 struct rpc_task *task;
1080
1081 task = rpc_run_task(task_setup);
1082 if (IS_ERR(task))
1083 return PTR_ERR(task);
1084
1085 ret = task->tk_status;
1086 rpc_put_task(task);
1087 return ret;
1088}
1089
7c513058
BS		 1090static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
1091 struct nfs_server *server,
ce5039c1
AA		 1092 struct rpc_message *msg,
1093 struct nfs4_sequence_args *args,
8fe72bac 1094 struct nfs4_sequence_res *res)
ce5039c1 1095{
9915ea7e 1096 struct nfs_client *clp = server->nfs_client;
2a3eb2b9 1097 struct nfs4_call_sync_data data = {
035168ab 1098 .seq_server = server,
ce5039c1
AA		 1099 .seq_args = args,
1100 .seq_res = res,
ce5039c1
AA		 1101 };
1102 struct rpc_task_setup task_setup = {
7c513058 1103 .rpc_client = clnt,
ce5039c1 1104 .rpc_message = msg,
9915ea7e 1105 .callback_ops = clp->cl_mvops->call_sync_ops,
ce5039c1
AA		 1106 .callback_data = &data
1107 };
1108
48c05854 1109 return nfs4_call_sync_custom(&task_setup);
ce5039c1
AA		 1110}
1111
7c513058
BS		 1112int nfs4_call_sync(struct rpc_clnt *clnt,
1113 struct nfs_server *server,
e73b83f2
BS		 1114 struct rpc_message *msg,
1115 struct nfs4_sequence_args *args,
1116 struct nfs4_sequence_res *res,
1117 int cache_reply)
1118{
fba83f34 1119 nfs4_init_sequence(args, res, cache_reply, 0);
9915ea7e 1120 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
e73b83f2 1121}
cccef3b9 1122
3c591175
TM		 1123static void
1124nfs4_inc_nlink_locked(struct inode *inode)
1125{
1126 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_OTHER;
1127 inc_nlink(inode);
1128}
1129
1130static void
1131nfs4_dec_nlink_locked(struct inode *inode)
1132{
1133 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_OTHER;
1134 drop_nlink(inode);
1135}
1136
1137static void
1138update_changeattr_locked(struct inode *dir, struct nfs4_change_info *cinfo,
5636ec4e 1139 unsigned long timestamp, unsigned long cache_validity)
1da177e4 1140{
38478b24 1141 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 1142
16e14375
TM		 1143 nfsi->cache_validity |= NFS_INO_INVALID_CTIME
1144 | NFS_INO_INVALID_MTIME
5636ec4e
TM		 1145 | NFS_INO_INVALID_DATA
1146 | cache_validity;
1eb5d98f 1147 if (cinfo->atomic && cinfo->before == inode_peek_iversion_raw(dir)) {
e603a4c1
TM		 1148 nfsi->cache_validity &= ~NFS_INO_REVAL_PAGECACHE;
1149 nfsi->attrtimeo_timestamp = jiffies;
1150 } else {
bfc69a45 1151 nfs_force_lookup_revalidate(dir);
1eb5d98f 1152 if (cinfo->before != inode_peek_iversion_raw(dir))
e603a4c1
TM		 1153 nfsi->cache_validity |= NFS_INO_INVALID_ACCESS |
1154 NFS_INO_INVALID_ACL;
1155 }
1eb5d98f 1156 inode_set_iversion_raw(dir, cinfo->after);
d3129ef6 1157 nfsi->read_cache_jiffies = timestamp;
3235b403 1158 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
c8d07159 1159 nfsi->cache_validity &= ~NFS_INO_INVALID_CHANGE;
de242c0b 1160 nfs_fscache_invalidate(dir);
3c591175
TM		 1161}
1162
1163static void
1164update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo,
5636ec4e 1165 unsigned long timestamp, unsigned long cache_validity)
3c591175
TM		 1166{
1167 spin_lock(&dir->i_lock);
5636ec4e 1168 update_changeattr_locked(dir, cinfo, timestamp, cache_validity);
38478b24 1169 spin_unlock(&dir->i_lock);
1da177e4
LT		 1170}
1171
8fd1ab74
TM		 1172struct nfs4_open_createattrs {
1173 struct nfs4_label *label;
1174 struct iattr *sattr;
1175 const __u32 verf[2];
1176};
1177
49f9a0fa
TM		 1178static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
1179 int err, struct nfs4_exception *exception)
1180{
1181 if (err != -EINVAL)
1182 return false;
1183 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1184 return false;
1185 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
1186 exception->retry = 1;
1187 return true;
1188}
1189
1bf85d8c
TM		 1190static fmode_t _nfs4_ctx_to_accessmode(const struct nfs_open_context *ctx)
1191{
1192 return ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
1193}
1194
1195static fmode_t _nfs4_ctx_to_openmode(const struct nfs_open_context *ctx)
1196{
1197 fmode_t ret = ctx->mode & (FMODE_READ|FMODE_WRITE);
1198
1199 return (ctx->mode & FMODE_EXEC) ? FMODE_READ | ret : ret;
1200}
1201
6ae37339
TM		 1202static u32
1203nfs4_map_atomic_open_share(struct nfs_server *server,
1204 fmode_t fmode, int openflags)
1205{
1206 u32 res = 0;
1207
1208 switch (fmode & (FMODE_READ | FMODE_WRITE)) {
1209 case FMODE_READ:
1210 res = NFS4_SHARE_ACCESS_READ;
1211 break;
1212 case FMODE_WRITE:
1213 res = NFS4_SHARE_ACCESS_WRITE;
1214 break;
1215 case FMODE_READ|FMODE_WRITE:
1216 res = NFS4_SHARE_ACCESS_BOTH;
1217 }
1218 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1219 goto out;
1220 /* Want no delegation if we're using O_DIRECT */
1221 if (openflags & O_DIRECT)
1222 res |= NFS4_SHARE_WANT_NO_DELEG;
1223out:
1224 return res;
1225}
1226
49f9a0fa
TM		 1227static enum open_claim_type4
1228nfs4_map_atomic_open_claim(struct nfs_server *server,
1229 enum open_claim_type4 claim)
1230{
1231 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
1232 return claim;
1233 switch (claim) {
1234 default:
1235 return claim;
1236 case NFS4_OPEN_CLAIM_FH:
1237 return NFS4_OPEN_CLAIM_NULL;
1238 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1239 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
1240 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1241 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
1242 }
1243}
2ced46c2
TM		 1244
1245static void nfs4_init_opendata_res(struct nfs4_opendata *p)
1246{
1247 p->o_res.f_attr = &p->f_attr;
1775fd3e 1248 p->o_res.f_label = p->f_label;
c1d51931
TM		 1249 p->o_res.seqid = p->o_arg.seqid;
1250 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 1251 p->o_res.server = p->o_arg.server;
5f657530 1252 p->o_res.access_request = p->o_arg.access;
2ced46c2 1253 nfs_fattr_init(&p->f_attr);
6926afd1 1254 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 1255}
1256
82a2c1b7 1257static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 1258 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8fd1ab74 1259 const struct nfs4_open_createattrs *c,
4a1c0893 1260 enum open_claim_type4 claim,
8535b2be 1261 gfp_t gfp_mask)
e56e0b78 1262{
82a2c1b7 1263 struct dentry *parent = dget_parent(dentry);
2b0143b5 1264 struct inode *dir = d_inode(parent);
e56e0b78 1265 struct nfs_server *server = NFS_SERVER(dir);
63f5f796 1266 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
8fd1ab74 1267 struct nfs4_label *label = (c != NULL) ? c->label : NULL;
e56e0b78
TM		 1268 struct nfs4_opendata *p;
1269
8535b2be 1270 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 1271 if (p == NULL)
1272 goto err;
14c43f76
DQ		 1273
1274 p->f_label = nfs4_label_alloc(server, gfp_mask);
1275 if (IS_ERR(p->f_label))
1276 goto err_free_p;
1277
a49c2691
KM		 1278 p->a_label = nfs4_label_alloc(server, gfp_mask);
1279 if (IS_ERR(p->a_label))
1280 goto err_free_f;
1281
63f5f796
TM		 1282 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
1283 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask);
badc76dd 1284 if (IS_ERR(p->o_arg.seqid))
14c43f76 1285 goto err_free_label;
82a2c1b7
AV		 1286 nfs_sb_active(dentry->d_sb);
1287 p->dentry = dget(dentry);
e56e0b78
TM		 1288 p->dir = parent;
1289 p->owner = sp;
1290 atomic_inc(&sp->so_count);
dc0b027d
TM		 1291 p->o_arg.open_flags = flags;
1292 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
536585cc 1293 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
6ae37339
TM		 1294 p->o_arg.share_access = nfs4_map_atomic_open_share(server,
1295 fmode, flags);
90910519
BC		 1296 if (flags & O_CREAT) {
1297 p->o_arg.umask = current_umask();
1298 p->o_arg.label = nfs4_label_copy(p->a_label, label);
1299 if (c->sattr != NULL && c->sattr->ia_valid != 0) {
1300 p->o_arg.u.attrs = &p->attrs;
1301 memcpy(&p->attrs, c->sattr, sizeof(p->attrs));
1302
1303 memcpy(p->o_arg.u.verifier.data, c->verf,
1304 sizeof(p->o_arg.u.verifier.data));
1305 }
1306 }
ae2bb032
WAA		 1307 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
1308 * will return permission denied for all bits until close */
1309 if (!(flags & O_EXCL)) {
1310 /* ask server to check for all possible rights as results
1311 * are cached */
536585cc
TM		 1312 switch (p->o_arg.claim) {
1313 default:
1314 break;
1315 case NFS4_OPEN_CLAIM_NULL:
1316 case NFS4_OPEN_CLAIM_FH:
1317 p->o_arg.access = NFS4_ACCESS_READ |
1318 NFS4_ACCESS_MODIFY |
1319 NFS4_ACCESS_EXTEND |
1320 NFS4_ACCESS_EXECUTE;
1321 }
ae2bb032 1322 }
7539bbab 1323 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 1324 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1325 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 1326 p->o_arg.name = &dentry->d_name;
e56e0b78 1327 p->o_arg.server = server;
aa9c2669 1328 p->o_arg.bitmask = nfs4_bitmask(server, label);
1549210f 1329 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
49f9a0fa 1330 switch (p->o_arg.claim) {
4a1c0893
TM		 1331 case NFS4_OPEN_CLAIM_NULL:
1332 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1333 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1334 p->o_arg.fh = NFS_FH(dir);
1335 break;
1336 case NFS4_OPEN_CLAIM_PREVIOUS:
1337 case NFS4_OPEN_CLAIM_FH:
1338 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1339 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
2b0143b5 1340 p->o_arg.fh = NFS_FH(d_inode(dentry));
4a1c0893 1341 }
cdd4e68b
TM		 1342 p->c_arg.fh = &p->o_res.fh;
1343 p->c_arg.stateid = &p->o_res.stateid;
1344 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 1345 nfs4_init_opendata_res(p);
c6d00e63 1346 kref_init(&p->kref);
e56e0b78 1347 return p;
14c43f76
DQ		 1348
1349err_free_label:
a49c2691
KM		 1350 nfs4_label_free(p->a_label);
1351err_free_f:
14c43f76
DQ		 1352 nfs4_label_free(p->f_label);
1353err_free_p:
e56e0b78
TM		 1354 kfree(p);
1355err:
1356 dput(parent);
1357 return NULL;
1358}
1359
c6d00e63 1360static void nfs4_opendata_free(struct kref *kref)
e56e0b78 1361{
c6d00e63
TM		 1362 struct nfs4_opendata *p = container_of(kref,
1363 struct nfs4_opendata, kref);
82a2c1b7 1364 struct super_block *sb = p->dentry->d_sb;
c6d00e63 1365
30ae2412 1366 nfs4_lgopen_release(p->lgp);
c6d00e63 1367 nfs_free_seqid(p->o_arg.seqid);
2e80dbe7 1368 nfs4_sequence_free_slot(&p->o_res.seq_res);
aac00a8d
TM		 1369 if (p->state != NULL)
1370 nfs4_put_open_state(p->state);
c6d00e63 1371 nfs4_put_state_owner(p->owner);
14c43f76 1372
a49c2691 1373 nfs4_label_free(p->a_label);
14c43f76
DQ		 1374 nfs4_label_free(p->f_label);
1375
c6d00e63 1376 dput(p->dir);
82a2c1b7
AV		 1377 dput(p->dentry);
1378 nfs_sb_deactive(sb);
6926afd1 1379 nfs_fattr_free_names(&p->f_attr);
e911b815 1380 kfree(p->f_attr.mdsthreshold);
c6d00e63
TM		 1381 kfree(p);
1382}
1383
1384static void nfs4_opendata_put(struct nfs4_opendata *p)
1385{
1386 if (p != NULL)
1387 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 1388}
1389
24311f88
TM		 1390static bool nfs4_mode_match_open_stateid(struct nfs4_state *state,
1391 fmode_t fmode)
1392{
1393 switch(fmode & (FMODE_READ|FMODE_WRITE)) {
1394 case FMODE_READ|FMODE_WRITE:
1395 return state->n_rdwr != 0;
1396 case FMODE_WRITE:
1397 return state->n_wronly != 0;
1398 case FMODE_READ:
1399 return state->n_rdonly != 0;
1400 }
1401 WARN_ON_ONCE(1);
1402 return false;
1403}
1404
be189f7e
TM		 1405static int can_open_cached(struct nfs4_state *state, fmode_t mode,
1406 int open_mode, enum open_claim_type4 claim)
6ee41268
TM		 1407{
1408 int ret = 0;
dc0b027d 1409
536e43d1 1410 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d 1411 goto out;
be189f7e
TM		 1412 switch (claim) {
1413 case NFS4_OPEN_CLAIM_NULL:
1414 case NFS4_OPEN_CLAIM_FH:
1415 goto out;
1416 default:
1417 break;
1418 }
dc0b027d 1419 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 1420 case FMODE_READ:
88069f77
TM		 1421 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1422 && state->n_rdonly != 0;
6ee41268
TM		 1423 break;
1424 case FMODE_WRITE:
88069f77
TM		 1425 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1426 && state->n_wronly != 0;
6ee41268
TM		 1427 break;
1428 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 1429 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1430 && state->n_rdwr != 0;
6ee41268 1431 }
dc0b027d 1432out:
6ee41268
TM		 1433 return ret;
1434}
1435
2a606188
TM		 1436static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode,
1437 enum open_claim_type4 claim)
aac00a8d 1438{
652f89f6
TM		 1439 if (delegation == NULL)
1440 return 0;
dc0b027d 1441 if ((delegation->type & fmode) != fmode)
aac00a8d 1442 return 0;
d25be546
TM		 1443 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1444 return 0;
2a606188
TM		 1445 switch (claim) {
1446 case NFS4_OPEN_CLAIM_NULL:
1447 case NFS4_OPEN_CLAIM_FH:
1448 break;
1449 case NFS4_OPEN_CLAIM_PREVIOUS:
1450 if (!test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
1451 break;
01e03bdc 1452 /* Fall through */
2a606188
TM		 1453 default:
1454 return 0;
1455 }
b7391f44 1456 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 1457 return 1;
1458}
1459
dc0b027d 1460static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 1461{
dc0b027d 1462 switch (fmode) {
e7616923
TM		 1463 case FMODE_WRITE:
1464 state->n_wronly++;
1465 break;
1466 case FMODE_READ:
1467 state->n_rdonly++;
1468 break;
1469 case FMODE_READ|FMODE_WRITE:
1470 state->n_rdwr++;
1471 }
dc0b027d 1472 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 1473}
1474
8a64c4ef
TM		 1475#ifdef CONFIG_NFS_V4_1
1476static bool nfs_open_stateid_recover_openmode(struct nfs4_state *state)
1477{
1478 if (state->n_rdonly && !test_bit(NFS_O_RDONLY_STATE, &state->flags))
1479 return true;
1480 if (state->n_wronly && !test_bit(NFS_O_WRONLY_STATE, &state->flags))
1481 return true;
1482 if (state->n_rdwr && !test_bit(NFS_O_RDWR_STATE, &state->flags))
1483 return true;
1484 return false;
1485}
1486#endif /* CONFIG_NFS_V4_1 */
1487
c9399f21
TM		 1488static void nfs_state_log_update_open_stateid(struct nfs4_state *state)
1489{
1490 if (test_and_clear_bit(NFS_STATE_CHANGE_WAIT, &state->flags))
1491 wake_up_all(&state->waitq);
1492}
1493
1494static void nfs_state_log_out_of_order_open_stateid(struct nfs4_state *state,
1495 const nfs4_stateid *stateid)
1496{
1497 u32 state_seqid = be32_to_cpu(state->open_stateid.seqid);
1498 u32 stateid_seqid = be32_to_cpu(stateid->seqid);
1499
1500 if (stateid_seqid == state_seqid + 1U ||
1501 (stateid_seqid == 1U && state_seqid == 0xffffffffU))
1502 nfs_state_log_update_open_stateid(state);
1503 else
1504 set_bit(NFS_STATE_CHANGE_WAIT, &state->flags);
1505}
1506
4f14c194
TM		 1507static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
1508{
1509 struct nfs_client *clp = state->owner->so_server->nfs_client;
1510 bool need_recover = false;
1511
1512 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly)
1513 need_recover = true;
1514 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly)
1515 need_recover = true;
1516 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr)
1517 need_recover = true;
1518 if (need_recover)
1519 nfs4_state_mark_reclaim_nograce(clp, state);
1520}
1521
c9399f21
TM		 1522/*
1523 * Check for whether or not the caller may update the open stateid
1524 * to the value passed in by stateid.
1525 *
1526 * Note: This function relies heavily on the server implementing
1527 * RFC7530 Section 9.1.4.2, and RFC5661 Section 8.2.2
1528 * correctly.
1529 * i.e. The stateid seqids have to be initialised to 1, and
1530 * are then incremented on every state transition.
1531 */
e999e80e 1532static bool nfs_need_update_open_stateid(struct nfs4_state *state,
c9399f21 1533 const nfs4_stateid *stateid)
e999e80e 1534{
c9399f21
TM		 1535 if (test_bit(NFS_OPEN_STATE, &state->flags) == 0 ||
1536 !nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1537 if (stateid->seqid == cpu_to_be32(1))
1538 nfs_state_log_update_open_stateid(state);
1539 else
1540 set_bit(NFS_STATE_CHANGE_WAIT, &state->flags);
e999e80e 1541 return true;
4f14c194 1542 }
c9399f21
TM		 1543
1544 if (nfs4_stateid_is_newer(stateid, &state->open_stateid)) {
1545 nfs_state_log_out_of_order_open_stateid(state, stateid);
e999e80e 1546 return true;
c9399f21 1547 }
e999e80e
TM		 1548 return false;
1549}
1550
f95549cf
TM		 1551static void nfs_resync_open_stateid_locked(struct nfs4_state *state)
1552{
3c38cbe2
TM		 1553 if (!(state->n_wronly || state->n_rdonly || state->n_rdwr))
1554 return;
f95549cf
TM		 1555 if (state->n_wronly)
1556 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1557 if (state->n_rdonly)
1558 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1559 if (state->n_rdwr)
1560 set_bit(NFS_O_RDWR_STATE, &state->flags);
3c38cbe2 1561 set_bit(NFS_OPEN_STATE, &state->flags);
f95549cf
TM		 1562}
1563
226056c5
TM		 1564static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
1565 nfs4_stateid *stateid, fmode_t fmode)
003707c7 1566{
226056c5
TM		 1567 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1568 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1569 case FMODE_WRITE:
1570 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1571 break;
1572 case FMODE_READ:
1573 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1574 break;
1575 case 0:
1576 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1577 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1578 clear_bit(NFS_OPEN_STATE, &state->flags);
1579 }
1580 if (stateid == NULL)
1581 return;
3e7dfb16
TM		 1582 /* Handle OPEN+OPEN_DOWNGRADE races */
1583 if (nfs4_stateid_match_other(stateid, &state->open_stateid) &&
1584 !nfs4_stateid_is_newer(stateid, &state->open_stateid)) {
f95549cf 1585 nfs_resync_open_stateid_locked(state);
c9399f21 1586 goto out;
f95549cf 1587 }
003707c7 1588 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 1589 nfs4_stateid_copy(&state->stateid, stateid);
1590 nfs4_stateid_copy(&state->open_stateid, stateid);
ad9e02dc 1591 trace_nfs4_open_stateid_update(state->inode, stateid, 0);
c9399f21
TM		 1592out:
1593 nfs_state_log_update_open_stateid(state);
226056c5
TM		 1594}
1595
4a1e2feb
TM		 1596static void nfs_clear_open_stateid(struct nfs4_state *state,
1597 nfs4_stateid *arg_stateid,
1598 nfs4_stateid *stateid, fmode_t fmode)
226056c5
TM		 1599{
1600 write_seqlock(&state->seqlock);
3e7dfb16
TM		 1601 /* Ignore, if the CLOSE argment doesn't match the current stateid */
1602 if (nfs4_state_match_open_stateid_other(state, arg_stateid))
1603 nfs_clear_open_stateid_locked(state, stateid, fmode);
226056c5 1604 write_sequnlock(&state->seqlock);
4f14c194
TM		 1605 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1606 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
226056c5
TM		 1607}
1608
1393d961 1609static void nfs_set_open_stateid_locked(struct nfs4_state *state,
c9399f21 1610 const nfs4_stateid *stateid, nfs4_stateid *freeme)
e9acf210
TM		 1611 __must_hold(&state->owner->so_lock)
1612 __must_hold(&state->seqlock)
1613 __must_hold(RCU)
1614
003707c7 1615{
c9399f21
TM		 1616 DEFINE_WAIT(wait);
1617 int status = 0;
1618 for (;;) {
1619
1620 if (!nfs_need_update_open_stateid(state, stateid))
1621 return;
1622 if (!test_bit(NFS_STATE_CHANGE_WAIT, &state->flags))
003707c7 1623 break;
c9399f21 1624 if (status)
003707c7 1625 break;
c9399f21
TM		 1626 /* Rely on seqids for serialisation with NFSv4.0 */
1627 if (!nfs4_has_session(NFS_SERVER(state->inode)->nfs_client))
1628 break;
1629
1630 prepare_to_wait(&state->waitq, &wait, TASK_KILLABLE);
1631 /*
1632 * Ensure we process the state changes in the same order
1633 * in which the server processed them by delaying the
1634 * update of the stateid until we are in sequence.
1635 */
1636 write_sequnlock(&state->seqlock);
1637 spin_unlock(&state->owner->so_lock);
1638 rcu_read_unlock();
ad9e02dc 1639 trace_nfs4_open_stateid_update_wait(state->inode, stateid, 0);
c9399f21
TM		 1640 if (!signal_pending(current)) {
1641 if (schedule_timeout(5*HZ) == 0)
1642 status = -EAGAIN;
1643 else
1644 status = 0;
1645 } else
1646 status = -EINTR;
1647 finish_wait(&state->waitq, &wait);
1648 rcu_read_lock();
1649 spin_lock(&state->owner->so_lock);
1650 write_seqlock(&state->seqlock);
003707c7 1651 }
c9399f21 1652
e1fff5df
TM		 1653 if (test_bit(NFS_OPEN_STATE, &state->flags) &&
1654 !nfs4_stateid_match_other(stateid, &state->open_stateid)) {
c9399f21
TM		 1655 nfs4_stateid_copy(freeme, &state->open_stateid);
1656 nfs_test_and_clear_all_open_stateid(state);
1657 }
1658
e999e80e
TM		 1659 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1660 nfs4_stateid_copy(&state->stateid, stateid);
1661 nfs4_stateid_copy(&state->open_stateid, stateid);
ad9e02dc 1662 trace_nfs4_open_stateid_update(state->inode, stateid, status);
c9399f21 1663 nfs_state_log_update_open_stateid(state);
003707c7
TM		 1664}
1665
c9399f21 1666static void nfs_state_set_open_stateid(struct nfs4_state *state,
1393d961 1667 const nfs4_stateid *open_stateid,
1393d961
TM		 1668 fmode_t fmode,
1669 nfs4_stateid *freeme)
1da177e4 1670{
8bda4e4c
TM		 1671 /*
1672 * Protect the call to nfs4_state_set_mode_locked and
1673 * serialise the stateid update
1674 */
1675 write_seqlock(&state->seqlock);
c9399f21
TM		 1676 nfs_set_open_stateid_locked(state, open_stateid, freeme);
1677 switch (fmode) {
1678 case FMODE_READ:
1679 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1680 break;
1681 case FMODE_WRITE:
1682 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1683 break;
1684 case FMODE_READ|FMODE_WRITE:
1685 set_bit(NFS_O_RDWR_STATE, &state->flags);
003707c7 1686 }
c9399f21
TM		 1687 set_bit(NFS_OPEN_STATE, &state->flags);
1688 write_sequnlock(&state->seqlock);
1689}
1690
27a30cf6
TM		 1691static void nfs_state_clear_open_state_flags(struct nfs4_state *state)
1692{
1693 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1694 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1695 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1696 clear_bit(NFS_OPEN_STATE, &state->flags);
1697}
1698
c9399f21
TM		 1699static void nfs_state_set_delegation(struct nfs4_state *state,
1700 const nfs4_stateid *deleg_stateid,
1701 fmode_t fmode)
1702{
1703 /*
1704 * Protect the call to nfs4_state_set_mode_locked and
1705 * serialise the stateid update
1706 */
1707 write_seqlock(&state->seqlock);
1708 nfs4_stateid_copy(&state->stateid, deleg_stateid);
1709 set_bit(NFS_DELEGATED_STATE, &state->flags);
8bda4e4c 1710 write_sequnlock(&state->seqlock);
1da177e4
LT		 1711}
1712
9f0c5124
TM		 1713static void nfs_state_clear_delegation(struct nfs4_state *state)
1714{
1715 write_seqlock(&state->seqlock);
1716 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1717 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1718 write_sequnlock(&state->seqlock);
1719}
1720
1393d961
TM		 1721static int update_open_stateid(struct nfs4_state *state,
1722 const nfs4_stateid *open_stateid,
1723 const nfs4_stateid *delegation,
1724 fmode_t fmode)
34310430 1725{
1393d961
TM		 1726 struct nfs_server *server = NFS_SERVER(state->inode);
1727 struct nfs_client *clp = server->nfs_client;
34310430
TM		 1728 struct nfs_inode *nfsi = NFS_I(state->inode);
1729 struct nfs_delegation *deleg_cur;
83aa3e0f 1730 nfs4_stateid freeme = { };
34310430
TM		 1731 int ret = 0;
1732
dc0b027d 1733 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1734
1735 rcu_read_lock();
c9399f21
TM		 1736 spin_lock(&state->owner->so_lock);
1737 if (open_stateid != NULL) {
1738 nfs_state_set_open_stateid(state, open_stateid, fmode, &freeme);
1739 ret = 1;
1740 }
1741
34310430
TM		 1742 deleg_cur = rcu_dereference(nfsi->delegation);
1743 if (deleg_cur == NULL)
1744 goto no_delegation;
1745
1746 spin_lock(&deleg_cur->lock);
17f26b12 1747 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
d25be546 1748 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1749 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1750 goto no_delegation_unlock;
1751
1752 if (delegation == NULL)
1753 delegation = &deleg_cur->stateid;
f597c537 1754 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1755 goto no_delegation_unlock;
1756
b7391f44 1757 nfs_mark_delegation_referenced(deleg_cur);
c9399f21 1758 nfs_state_set_delegation(state, &deleg_cur->stateid, fmode);
34310430
TM		 1759 ret = 1;
1760no_delegation_unlock:
1761 spin_unlock(&deleg_cur->lock);
1762no_delegation:
c9399f21
TM		 1763 if (ret)
1764 update_open_stateflags(state, fmode);
1765 spin_unlock(&state->owner->so_lock);
34310430
TM		 1766 rcu_read_unlock();
1767
4f14c194 1768 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1393d961
TM		 1769 nfs4_schedule_state_manager(clp);
1770 if (freeme.type != 0)
1771 nfs4_test_and_free_stateid(server, &freeme,
1772 state->owner->so_cred);
34310430
TM		 1773
1774 return ret;
1775}
1776
39071e6f
TM		 1777static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp,
1778 const nfs4_stateid *stateid)
1779{
1780 struct nfs4_state *state = lsp->ls_state;
1781 bool ret = false;
1782
1783 spin_lock(&state->state_lock);
1784 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid))
1785 goto out_noupdate;
1786 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid))
1787 goto out_noupdate;
1788 nfs4_stateid_copy(&lsp->ls_stateid, stateid);
1789 ret = true;
1790out_noupdate:
1791 spin_unlock(&state->state_lock);
1792 return ret;
1793}
34310430 1794
dc0b027d 1795static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1796{
1797 struct nfs_delegation *delegation;
1798
f5086242 1799 fmode &= FMODE_READ|FMODE_WRITE;
aac00a8d
TM		 1800 rcu_read_lock();
1801 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1802 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1803 rcu_read_unlock();
1804 return;
1805 }
1806 rcu_read_unlock();
57ec14c5 1807 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1808}
1809
6ee41268 1810static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1811{
1812 struct nfs4_state *state = opendata->state;
1813 struct nfs_inode *nfsi = NFS_I(state->inode);
1814 struct nfs_delegation *delegation;
f448badd 1815 int open_mode = opendata->o_arg.open_flags;
dc0b027d 1816 fmode_t fmode = opendata->o_arg.fmode;
2a606188 1817 enum open_claim_type4 claim = opendata->o_arg.claim;
aac00a8d
TM		 1818 nfs4_stateid stateid;
1819 int ret = -EAGAIN;
1820
aac00a8d 1821 for (;;) {
61beef75 1822 spin_lock(&state->owner->so_lock);
be189f7e 1823 if (can_open_cached(state, fmode, open_mode, claim)) {
61beef75 1824 update_open_stateflags(state, fmode);
6ee41268 1825 spin_unlock(&state->owner->so_lock);
61beef75 1826 goto out_return_state;
6ee41268 1827 }
61beef75 1828 spin_unlock(&state->owner->so_lock);
34310430
TM		 1829 rcu_read_lock();
1830 delegation = rcu_dereference(nfsi->delegation);
2a606188 1831 if (!can_open_delegated(delegation, fmode, claim)) {
34310430 1832 rcu_read_unlock();
aac00a8d 1833 break;
34310430 1834 }
aac00a8d 1835 /* Save the delegation */
f597c537 1836 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1837 rcu_read_unlock();
fa332941 1838 nfs_release_seqid(opendata->o_arg.seqid);
bdeca1b7
TM		 1839 if (!opendata->is_recover) {
1840 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1841 if (ret != 0)
1842 goto out;
1843 }
aac00a8d 1844 ret = -EAGAIN;
34310430
TM		 1845
1846 /* Try to update the stateid using the delegation */
dc0b027d 1847 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1848 goto out_return_state;
aac00a8d 1849 }
aac00a8d
TM		 1850out:
1851 return ERR_PTR(ret);
1852out_return_state:
ace9fad4 1853 refcount_inc(&state->count);
aac00a8d
TM		 1854 return state;
1855}
1856
e23008ec
AA		 1857static void
1858nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1859{
1860 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1861 struct nfs_delegation *delegation;
1862 int delegation_flags = 0;
1863
1864 rcu_read_lock();
1865 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1866 if (delegation)
1867 delegation_flags = delegation->flags;
1868 rcu_read_unlock();
72d79ff8
TM		 1869 switch (data->o_arg.claim) {
1870 default:
1871 break;
1872 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1873 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
e23008ec
AA		 1874 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1875 "returning a delegation for "
1876 "OPEN(CLAIM_DELEGATE_CUR)\n",
1877 clp->cl_hostname);
72d79ff8
TM		 1878 return;
1879 }
1880 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
e23008ec 1881 nfs_inode_set_delegation(state->inode,
35156bff
TM		 1882 data->owner->so_cred,
1883 data->o_res.delegation_type,
1884 &data->o_res.delegation,
1885 data->o_res.pagemod_limit);
e23008ec
AA		 1886 else
1887 nfs_inode_reclaim_delegation(state->inode,
35156bff
TM		 1888 data->owner->so_cred,
1889 data->o_res.delegation_type,
1890 &data->o_res.delegation,
1891 data->o_res.pagemod_limit);
8b199e58
JL		 1892
1893 if (data->o_res.do_recall)
1894 nfs_async_inode_return_delegation(state->inode,
1895 &data->o_res.delegation);
e23008ec
AA		 1896}
1897
1898/*
1899 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1900 * and update the nfs4_state.
1901 */
1902static struct nfs4_state *
1903_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1904{
1905 struct inode *inode = data->state->inode;
1906 struct nfs4_state *state = data->state;
1907 int ret;
1908
d2bfda2e 1909 if (!data->rpc_done) {
37a8484a
AS		 1910 if (data->rpc_status)
1911 return ERR_PTR(data->rpc_status);
d2bfda2e
WAA		 1912 /* cached opens have already been processed */
1913 goto update;
e23008ec
AA		 1914 }
1915
e23008ec
AA		 1916 ret = nfs_refresh_inode(inode, &data->f_attr);
1917 if (ret)
37a8484a 1918 return ERR_PTR(ret);
e23008ec
AA		 1919
1920 if (data->o_res.delegation_type != 0)
1921 nfs4_opendata_check_deleg(data, state);
d2bfda2e 1922update:
e3c8dc76
TM		 1923 if (!update_open_stateid(state, &data->o_res.stateid,
1924 NULL, data->o_arg.fmode))
1925 return ERR_PTR(-EAGAIN);
ace9fad4 1926 refcount_inc(&state->count);
e23008ec
AA		 1927
1928 return state;
e23008ec
AA		 1929}
1930
4e2fcac7
TM		 1931static struct inode *
1932nfs4_opendata_get_inode(struct nfs4_opendata *data)
1933{
1934 struct inode *inode;
1935
1936 switch (data->o_arg.claim) {
1937 case NFS4_OPEN_CLAIM_NULL:
1938 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1939 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1940 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1941 return ERR_PTR(-EAGAIN);
1942 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh,
1943 &data->f_attr, data->f_label);
1944 break;
1945 default:
1946 inode = d_inode(data->dentry);
1947 ihold(inode);
1948 nfs_refresh_inode(inode, &data->f_attr);
1949 }
1950 return inode;
1951}
1952
e23008ec 1953static struct nfs4_state *
75e8c48b 1954nfs4_opendata_find_nfs4_state(struct nfs4_opendata *data)
24ac23ab 1955{
75e8c48b 1956 struct nfs4_state *state;
24ac23ab 1957 struct inode *inode;
75e8c48b
TM		 1958
1959 inode = nfs4_opendata_get_inode(data);
1960 if (IS_ERR(inode))
1961 return ERR_CAST(inode);
1962 if (data->state != NULL && data->state->inode == inode) {
1963 state = data->state;
ace9fad4 1964 refcount_inc(&state->count);
75e8c48b
TM		 1965 } else
1966 state = nfs4_get_open_state(inode, data->owner);
1967 iput(inode);
1968 if (state == NULL)
1969 state = ERR_PTR(-ENOMEM);
1970 return state;
1971}
1972
1973static struct nfs4_state *
1974_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1975{
1976 struct nfs4_state *state;
24ac23ab 1977
aac00a8d 1978 if (!data->rpc_done) {
6ee41268 1979 state = nfs4_try_open_cached(data);
9759b0fb 1980 trace_nfs4_cached_open(data->state);
aac00a8d
TM		 1981 goto out;
1982 }
1983
75e8c48b
TM		 1984 state = nfs4_opendata_find_nfs4_state(data);
1985 if (IS_ERR(state))
1986 goto out;
1987
e23008ec
AA		 1988 if (data->o_res.delegation_type != 0)
1989 nfs4_opendata_check_deleg(data, state);
e3c8dc76
TM		 1990 if (!update_open_stateid(state, &data->o_res.stateid,
1991 NULL, data->o_arg.fmode)) {
1992 nfs4_put_open_state(state);
1993 state = ERR_PTR(-EAGAIN);
1994 }
aac00a8d 1995out:
7aa262b5 1996 nfs_release_seqid(data->o_arg.seqid);
24ac23ab
TM		 1997 return state;
1998}
1999
e23008ec
AA		 2000static struct nfs4_state *
2001nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
2002{
2e80dbe7
TM		 2003 struct nfs4_state *ret;
2004
e23008ec 2005 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
2e80dbe7
TM		 2006 ret =_nfs4_opendata_reclaim_to_nfs4_state(data);
2007 else
2008 ret = _nfs4_opendata_to_nfs4_state(data);
2009 nfs4_sequence_free_slot(&data->o_res.seq_res);
2010 return ret;
e23008ec
AA		 2011}
2012
0de43976
TM		 2013static struct nfs_open_context *
2014nfs4_state_find_open_context_mode(struct nfs4_state *state, fmode_t mode)
864472e9
TM		 2015{
2016 struct nfs_inode *nfsi = NFS_I(state->inode);
2017 struct nfs_open_context *ctx;
2018
0de43976
TM		 2019 rcu_read_lock();
2020 list_for_each_entry_rcu(ctx, &nfsi->open_files, list) {
864472e9
TM		 2021 if (ctx->state != state)
2022 continue;
0de43976
TM		 2023 if ((ctx->mode & mode) != mode)
2024 continue;
2025 if (!get_nfs_open_context(ctx))
2026 continue;
2027 rcu_read_unlock();
864472e9
TM		 2028 return ctx;
2029 }
0de43976 2030 rcu_read_unlock();
864472e9
TM		 2031 return ERR_PTR(-ENOENT);
2032}
2033
0de43976
TM		 2034static struct nfs_open_context *
2035nfs4_state_find_open_context(struct nfs4_state *state)
2036{
2037 struct nfs_open_context *ctx;
2038
2039 ctx = nfs4_state_find_open_context_mode(state, FMODE_READ|FMODE_WRITE);
2040 if (!IS_ERR(ctx))
2041 return ctx;
2042 ctx = nfs4_state_find_open_context_mode(state, FMODE_WRITE);
2043 if (!IS_ERR(ctx))
2044 return ctx;
2045 return nfs4_state_find_open_context_mode(state, FMODE_READ);
2046}
2047
4a1c0893
TM		 2048static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
2049 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 2050{
2051 struct nfs4_opendata *opendata;
2052
4a1c0893 2053 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
8fd1ab74 2054 NULL, claim, GFP_NOFS);
6f220ed5
TM		 2055 if (opendata == NULL)
2056 return ERR_PTR(-ENOMEM);
2057 opendata->state = state;
ace9fad4 2058 refcount_inc(&state->count);
6f220ed5
TM		 2059 return opendata;
2060}
2061
24311f88
TM		 2062static int nfs4_open_recover_helper(struct nfs4_opendata *opendata,
2063 fmode_t fmode)
864472e9 2064{
2ced46c2 2065 struct nfs4_state *newstate;
864472e9
TM		 2066 int ret;
2067
24311f88 2068 if (!nfs4_mode_match_open_stateid(opendata->state, fmode))
39f897fd 2069 return 0;
dc0b027d
TM		 2070 opendata->o_arg.open_flags = 0;
2071 opendata->o_arg.fmode = fmode;
be36e185
TM		 2072 opendata->o_arg.share_access = nfs4_map_atomic_open_share(
2073 NFS_SB(opendata->dentry->d_sb),
2074 fmode, 0);
2ced46c2
TM		 2075 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
2076 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
2077 nfs4_init_opendata_res(opendata);
b257957e 2078 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 2079 if (ret != 0)
2080 return ret;
2ced46c2 2081 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 2082 if (IS_ERR(newstate))
2083 return PTR_ERR(newstate);
24311f88
TM		 2084 if (newstate != opendata->state)
2085 ret = -ESTALE;
643168c2 2086 nfs4_close_state(newstate, fmode);
24311f88 2087 return ret;
864472e9
TM		 2088}
2089
2090static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
2091{
864472e9
TM		 2092 int ret;
2093
2094 /* memory barrier prior to reading state->n_* */
2095 smp_rmb();
24311f88
TM		 2096 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
2097 if (ret != 0)
2098 return ret;
2099 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE);
2100 if (ret != 0)
2101 return ret;
2102 ret = nfs4_open_recover_helper(opendata, FMODE_READ);
2103 if (ret != 0)
2104 return ret;
1ac7e2fd
TM		 2105 /*
2106 * We may have performed cached opens for all three recoveries.
2107 * Check if we need to update the current stateid.
2108 */
2109 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 2110 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 2111 write_seqlock(&state->seqlock);
1ac7e2fd 2112 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 2113 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 2114 write_sequnlock(&state->seqlock);
1ac7e2fd 2115 }
864472e9
TM		 2116 return 0;
2117}
2118
1da177e4
LT		 2119/*
2120 * OPEN_RECLAIM:
2121 * reclaim state on the server after a reboot.
1da177e4 2122 */
539cd03a 2123static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 2124{
1ac7e2fd 2125 struct nfs_delegation *delegation;
864472e9 2126 struct nfs4_opendata *opendata;
dc0b027d 2127 fmode_t delegation_type = 0;
1da177e4
LT		 2128 int status;
2129
4a1c0893
TM		 2130 opendata = nfs4_open_recoverdata_alloc(ctx, state,
2131 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 2132 if (IS_ERR(opendata))
2133 return PTR_ERR(opendata);
1ac7e2fd
TM		 2134 rcu_read_lock();
2135 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 2136 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 2137 delegation_type = delegation->type;
1ac7e2fd 2138 rcu_read_unlock();
864472e9
TM		 2139 opendata->o_arg.u.delegation_type = delegation_type;
2140 status = nfs4_open_recover(opendata, state);
c6d00e63 2141 nfs4_opendata_put(opendata);
1da177e4
LT		 2142 return status;
2143}
2144
539cd03a 2145static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 2146{
2147 struct nfs_server *server = NFS_SERVER(state->inode);
2148 struct nfs4_exception exception = { };
2149 int err;
2150 do {
539cd03a 2151 err = _nfs4_do_open_reclaim(ctx, state);
42113a75 2152 trace_nfs4_open_reclaim(ctx, 0, err);
49f9a0fa
TM		 2153 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2154 continue;
168667c4 2155 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 2156 break;
2157 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 2158 } while (exception.retry);
2159 return err;
2160}
2161
864472e9
TM		 2162static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
2163{
2164 struct nfs_open_context *ctx;
2165 int ret;
2166
2167 ctx = nfs4_state_find_open_context(state);
2168 if (IS_ERR(ctx))
91876b13 2169 return -EAGAIN;
27a30cf6
TM		 2170 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2171 nfs_state_clear_open_state_flags(state);
539cd03a 2172 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 2173 put_nfs_open_context(ctx);
2174 return ret;
2175}
2176
dce2630c 2177static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, struct file_lock *fl, int err)
1da177e4 2178{
be76b5b6
TM		 2179 switch (err) {
2180 default:
2181 printk(KERN_ERR "NFS: %s: unhandled error "
2182 "%d.\n", __func__, err);
2183 case 0:
2184 case -ENOENT:
8eee52af 2185 case -EAGAIN:
be76b5b6 2186 case -ESTALE:
67e7b52d 2187 case -ETIMEDOUT:
be76b5b6
TM		 2188 break;
2189 case -NFS4ERR_BADSESSION:
2190 case -NFS4ERR_BADSLOT:
2191 case -NFS4ERR_BAD_HIGH_SLOT:
2192 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
2193 case -NFS4ERR_DEADSESSION:
be76b5b6
TM		 2194 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
2195 return -EAGAIN;
2196 case -NFS4ERR_STALE_CLIENTID:
2197 case -NFS4ERR_STALE_STATEID:
be76b5b6
TM		 2198 /* Don't recall a delegation if it was lost */
2199 nfs4_schedule_lease_recovery(server->nfs_client);
2200 return -EAGAIN;
352297b9
CL		 2201 case -NFS4ERR_MOVED:
2202 nfs4_schedule_migration_recovery(server);
2203 return -EAGAIN;
8ef2f8d4
CL		 2204 case -NFS4ERR_LEASE_MOVED:
2205 nfs4_schedule_lease_moved_recovery(server->nfs_client);
2206 return -EAGAIN;
be76b5b6
TM		 2207 case -NFS4ERR_DELEG_REVOKED:
2208 case -NFS4ERR_ADMIN_REVOKED:
404ea356 2209 case -NFS4ERR_EXPIRED:
be76b5b6 2210 case -NFS4ERR_BAD_STATEID:
db4f2e63 2211 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 2212 nfs_inode_find_state_and_recover(state->inode,
2213 stateid);
2214 nfs4_schedule_stateid_recovery(server, state);
869f9dfa 2215 return -EAGAIN;
be76b5b6
TM		 2216 case -NFS4ERR_DELAY:
2217 case -NFS4ERR_GRACE:
be76b5b6
TM		 2218 ssleep(1);
2219 return -EAGAIN;
db4f2e63
TM		 2220 case -ENOMEM:
2221 case -NFS4ERR_DENIED:
dce2630c
N		 2222 if (fl) {
2223 struct nfs4_lock_state *lsp = fl->fl_u.nfs4_fl.owner;
2224 if (lsp)
2225 set_bit(NFS_LOCK_LOST, &lsp->ls_flags);
2226 }
db4f2e63 2227 return 0;
be76b5b6 2228 }
1da177e4
LT		 2229 return err;
2230}
2231
24311f88 2232int nfs4_open_delegation_recall(struct nfs_open_context *ctx,
5eb8d18c 2233 struct nfs4_state *state, const nfs4_stateid *stateid)
db4f2e63
TM		 2234{
2235 struct nfs_server *server = NFS_SERVER(state->inode);
2236 struct nfs4_opendata *opendata;
24311f88 2237 int err = 0;
db4f2e63
TM		 2238
2239 opendata = nfs4_open_recoverdata_alloc(ctx, state,
2240 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
2241 if (IS_ERR(opendata))
2242 return PTR_ERR(opendata);
2243 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
5eb8d18c 2244 if (!test_bit(NFS_O_RDWR_STATE, &state->flags)) {
24311f88
TM		 2245 err = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
2246 if (err)
5eb8d18c
TM		 2247 goto out;
2248 }
2249 if (!test_bit(NFS_O_WRONLY_STATE, &state->flags)) {
24311f88
TM		 2250 err = nfs4_open_recover_helper(opendata, FMODE_WRITE);
2251 if (err)
5eb8d18c
TM		 2252 goto out;
2253 }
2254 if (!test_bit(NFS_O_RDONLY_STATE, &state->flags)) {
24311f88 2255 err = nfs4_open_recover_helper(opendata, FMODE_READ);
5eb8d18c
TM		 2256 if (err)
2257 goto out;
24311f88 2258 }
5eb8d18c
TM		 2259 nfs_state_clear_delegation(state);
2260out:
db4f2e63 2261 nfs4_opendata_put(opendata);
dce2630c 2262 return nfs4_handle_delegation_recall_error(server, state, stateid, NULL, err);
db4f2e63
TM		 2263}
2264
be05c860
CL		 2265static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
2266{
2267 struct nfs4_opendata *data = calldata;
2268
7981c8a6
AS		 2269 nfs4_setup_sequence(data->o_arg.server->nfs_client,
2270 &data->c_arg.seq_args, &data->c_res.seq_res, task);
be05c860
CL		 2271}
2272
cdd4e68b
TM		 2273static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
2274{
2275 struct nfs4_opendata *data = calldata;
2276
17ead6c8 2277 nfs40_sequence_done(task, &data->c_res.seq_res);
be05c860 2278
cdd4e68b 2279 data->rpc_status = task->tk_status;
26e976a8 2280 if (data->rpc_status == 0) {
f597c537 2281 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 2282 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 2283 renew_lease(data->o_res.server, data->timestamp);
a7a3b1e9 2284 data->rpc_done = true;
26e976a8 2285 }
cdd4e68b
TM		 2286}
2287
2288static void nfs4_open_confirm_release(void *calldata)
2289{
2290 struct nfs4_opendata *data = calldata;
2291 struct nfs4_state *state = NULL;
2292
2293 /* If this request hasn't been cancelled, do nothing */
a7a3b1e9 2294 if (!data->cancelled)
cdd4e68b
TM		 2295 goto out_free;
2296 /* In case of error, no cleanup! */
3e309914 2297 if (!data->rpc_done)
cdd4e68b 2298 goto out_free;
cdd4e68b 2299 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 2300 if (!IS_ERR(state))
643168c2 2301 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 2302out_free:
c6d00e63 2303 nfs4_opendata_put(data);
cdd4e68b
TM		 2304}
2305
2306static const struct rpc_call_ops nfs4_open_confirm_ops = {
be05c860 2307 .rpc_call_prepare = nfs4_open_confirm_prepare,
cdd4e68b
TM		 2308 .rpc_call_done = nfs4_open_confirm_done,
2309 .rpc_release = nfs4_open_confirm_release,
2310};
2311
2312/*
2313 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
2314 */
2315static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
2316{
2b0143b5 2317 struct nfs_server *server = NFS_SERVER(d_inode(data->dir));
cdd4e68b 2318 struct rpc_task *task;
5138fde0
TM		 2319 struct rpc_message msg = {
2320 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
2321 .rpc_argp = &data->c_arg,
2322 .rpc_resp = &data->c_res,
2323 .rpc_cred = data->owner->so_cred,
2324 };
c970aa85
TM		 2325 struct rpc_task_setup task_setup_data = {
2326 .rpc_client = server->client,
5138fde0 2327 .rpc_message = &msg,
c970aa85
TM		 2328 .callback_ops = &nfs4_open_confirm_ops,
2329 .callback_data = data,
101070ca 2330 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2331 .flags = RPC_TASK_ASYNC,
2332 };
1da177e4
LT		 2333 int status;
2334
fba83f34
AS		 2335 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1,
2336 data->is_recover);
c6d00e63 2337 kref_get(&data->kref);
a7a3b1e9 2338 data->rpc_done = false;
3e309914 2339 data->rpc_status = 0;
5138fde0 2340 data->timestamp = jiffies;
c970aa85 2341 task = rpc_run_task(&task_setup_data);
7a1218a2 2342 if (IS_ERR(task))
cdd4e68b 2343 return PTR_ERR(task);
820bf85c 2344 status = rpc_wait_for_completion_task(task);
cdd4e68b 2345 if (status != 0) {
a7a3b1e9 2346 data->cancelled = true;
cdd4e68b
TM		 2347 smp_wmb();
2348 } else
2349 status = data->rpc_status;
e6b3c4db 2350 rpc_put_task(task);
1da177e4
LT		 2351 return status;
2352}
2353
24ac23ab 2354static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 2355{
24ac23ab
TM		 2356 struct nfs4_opendata *data = calldata;
2357 struct nfs4_state_owner *sp = data->owner;
549b19cc 2358 struct nfs_client *clp = sp->so_server->nfs_client;
2a606188 2359 enum open_claim_type4 claim = data->o_arg.claim;
5138fde0 2360
24ac23ab 2361 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 2362 goto out_wait;
aac00a8d
TM		 2363 /*
2364 * Check if we still need to send an OPEN call, or if we can use
2365 * a delegation instead.
2366 */
2367 if (data->state != NULL) {
2368 struct nfs_delegation *delegation;
2369
be189f7e
TM		 2370 if (can_open_cached(data->state, data->o_arg.fmode,
2371 data->o_arg.open_flags, claim))
6ee41268 2372 goto out_no_action;
aac00a8d
TM		 2373 rcu_read_lock();
2374 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
2a606188 2375 if (can_open_delegated(delegation, data->o_arg.fmode, claim))
652f89f6 2376 goto unlock_no_action;
aac00a8d
TM		 2377 rcu_read_unlock();
2378 }
95b72eb0 2379 /* Update client id. */
549b19cc 2380 data->o_arg.clientid = clp->cl_clientid;
2a606188
TM		 2381 switch (claim) {
2382 default:
2383 break;
8188df17
TM		 2384 case NFS4_OPEN_CLAIM_PREVIOUS:
2385 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
2386 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 2387 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
01e03bdc 2388 /* Fall through */
8188df17
TM		 2389 case NFS4_OPEN_CLAIM_FH:
2390 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5 2391 }
26e976a8 2392 data->timestamp = jiffies;
42e1cca7 2393 if (nfs4_setup_sequence(data->o_arg.server->nfs_client,
d898528c 2394 &data->o_arg.seq_args,
2240a9e2
TM		 2395 &data->o_res.seq_res,
2396 task) != 0)
2397 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 2398
2399 /* Set the create mode (note dependency on the session type) */
2400 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
2401 if (data->o_arg.open_flags & O_EXCL) {
2402 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
2403 if (nfs4_has_persistent_session(clp))
2404 data->o_arg.createmode = NFS4_CREATE_GUARDED;
2405 else if (clp->cl_mvops->minor_version > 0)
2406 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
2407 }
6ee41268 2408 return;
652f89f6 2409unlock_no_action:
9759b0fb 2410 trace_nfs4_cached_open(data->state);
652f89f6 2411 rcu_read_unlock();
6ee41268
TM		 2412out_no_action:
2413 task->tk_action = NULL;
c8da19b9 2414out_wait:
b75ad4cd 2415 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 2416}
2417
24ac23ab
TM		 2418static void nfs4_open_done(struct rpc_task *task, void *calldata)
2419{
2420 struct nfs4_opendata *data = calldata;
1da177e4 2421
24ac23ab 2422 data->rpc_status = task->tk_status;
d898528c 2423
2e80dbe7 2424 if (!nfs4_sequence_process(task, &data->o_res.seq_res))
14516c3a 2425 return;
d898528c 2426
24ac23ab 2427 if (task->tk_status == 0) {
807d66d8
TM		 2428 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
2429 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 2430 case S_IFREG:
2431 break;
2432 case S_IFLNK:
24ac23ab 2433 data->rpc_status = -ELOOP;
6f926b5b
TM		 2434 break;
2435 case S_IFDIR:
24ac23ab 2436 data->rpc_status = -EISDIR;
6f926b5b
TM		 2437 break;
2438 default:
24ac23ab 2439 data->rpc_status = -ENOTDIR;
807d66d8 2440 }
6f926b5b 2441 }
26e976a8 2442 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 2443 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
2444 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 2445 }
a7a3b1e9 2446 data->rpc_done = true;
24ac23ab 2447}
6f926b5b 2448
24ac23ab
TM		 2449static void nfs4_open_release(void *calldata)
2450{
2451 struct nfs4_opendata *data = calldata;
2452 struct nfs4_state *state = NULL;
2453
2454 /* If this request hasn't been cancelled, do nothing */
a7a3b1e9 2455 if (!data->cancelled)
24ac23ab
TM		 2456 goto out_free;
2457 /* In case of error, no cleanup! */
3e309914 2458 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 2459 goto out_free;
2460 /* In case we need an open_confirm, no cleanup! */
2461 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
2462 goto out_free;
24ac23ab 2463 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 2464 if (!IS_ERR(state))
643168c2 2465 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 2466out_free:
c6d00e63 2467 nfs4_opendata_put(data);
24ac23ab
TM		 2468}
2469
2470static const struct rpc_call_ops nfs4_open_ops = {
2471 .rpc_call_prepare = nfs4_open_prepare,
2472 .rpc_call_done = nfs4_open_done,
2473 .rpc_release = nfs4_open_release,
2474};
2475
3b65a30d
FI		 2476static int nfs4_run_open_task(struct nfs4_opendata *data,
2477 struct nfs_open_context *ctx)
24ac23ab 2478{
2b0143b5 2479 struct inode *dir = d_inode(data->dir);
24ac23ab
TM		 2480 struct nfs_server *server = NFS_SERVER(dir);
2481 struct nfs_openargs *o_arg = &data->o_arg;
2482 struct nfs_openres *o_res = &data->o_res;
2483 struct rpc_task *task;
5138fde0
TM		 2484 struct rpc_message msg = {
2485 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
2486 .rpc_argp = o_arg,
2487 .rpc_resp = o_res,
2488 .rpc_cred = data->owner->so_cred,
2489 };
c970aa85
TM		 2490 struct rpc_task_setup task_setup_data = {
2491 .rpc_client = server->client,
5138fde0 2492 .rpc_message = &msg,
c970aa85
TM		 2493 .callback_ops = &nfs4_open_ops,
2494 .callback_data = data,
101070ca 2495 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2496 .flags = RPC_TASK_ASYNC,
2497 };
24ac23ab
TM		 2498 int status;
2499
c6d00e63 2500 kref_get(&data->kref);
a7a3b1e9 2501 data->rpc_done = false;
3e309914 2502 data->rpc_status = 0;
a7a3b1e9
BC		 2503 data->cancelled = false;
2504 data->is_recover = false;
3b65a30d
FI		 2505 if (!ctx) {
2506 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1, 1);
a7a3b1e9 2507 data->is_recover = true;
67e7b52d 2508 task_setup_data.flags |= RPC_TASK_TIMEOUT;
2409a976 2509 } else {
3b65a30d 2510 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1, 0);
2409a976
FI		 2511 pnfs_lgopen_prepare(data, ctx);
2512 }
c970aa85 2513 task = rpc_run_task(&task_setup_data);
d9b67e1e
AS		 2514 if (IS_ERR(task))
2515 return PTR_ERR(task);
820bf85c 2516 status = rpc_wait_for_completion_task(task);
d9b67e1e 2517 if (status != 0) {
a7a3b1e9 2518 data->cancelled = true;
d9b67e1e
AS		 2519 smp_wmb();
2520 } else
2521 status = data->rpc_status;
2522 rpc_put_task(task);
b257957e
AB		 2523
2524 return status;
2525}
2526
2527static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
2528{
2b0143b5 2529 struct inode *dir = d_inode(data->dir);
b257957e 2530 struct nfs_openres *o_res = &data->o_res;
d9b67e1e 2531 int status;
b257957e 2532
3b65a30d 2533 status = nfs4_run_open_task(data, NULL);
b257957e
AB		 2534 if (status != 0 || !data->rpc_done)
2535 return status;
2536
6926afd1
TM		 2537 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
2538
d7e98258 2539 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM)
b257957e 2540 status = _nfs4_proc_open_confirm(data);
b257957e
AB		 2541
2542 return status;
2543}
2544
f3792d63
TM		 2545/*
2546 * Additional permission checks in order to distinguish between an
2547 * open for read, and an open for execute. This works around the
2548 * fact that NFSv4 OPEN treats read and execute permissions as being
2549 * the same.
2550 * Note that in the non-execute case, we want to turn off permission
2551 * checking if we just created a new file (POSIX open() semantics).
2552 */
a52458b4 2553static int nfs4_opendata_access(const struct cred *cred,
6168f62c 2554 struct nfs4_opendata *opendata,
f8d9a897
WAA		 2555 struct nfs4_state *state, fmode_t fmode,
2556 int openflags)
6168f62c
WAA		 2557{
2558 struct nfs_access_entry cache;
1e6f2095 2559 u32 mask, flags;
6168f62c
WAA		 2560
2561 /* access call failed or for some reason the server doesn't
2562 * support any access modes -- defer access call until later */
2563 if (opendata->o_res.access_supported == 0)
2564 return 0;
2565
2566 mask = 0;
f3792d63
TM		 2567 /*
2568 * Use openflags to check for exec, because fmode won't
2569 * always have FMODE_EXEC set when file open for exec.
2570 */
f8d9a897
WAA		 2571 if (openflags & __FMODE_EXEC) {
2572 /* ONLY check for exec rights */
1e6f2095
AS		 2573 if (S_ISDIR(state->inode->i_mode))
2574 mask = NFS4_ACCESS_LOOKUP;
2575 else
2576 mask = NFS4_ACCESS_EXECUTE;
f3792d63 2577 } else if ((fmode & FMODE_READ) && !opendata->file_created)
1e6f2095 2578 mask = NFS4_ACCESS_READ;
6168f62c
WAA		 2579
2580 cache.cred = cred;
6168f62c
WAA		 2581 nfs_access_set_mask(&cache, opendata->o_res.access_result);
2582 nfs_access_add_cache(state->inode, &cache);
2583
1e6f2095
AS		 2584 flags = NFS4_ACCESS_READ | NFS4_ACCESS_EXECUTE | NFS4_ACCESS_LOOKUP;
2585 if ((mask & ~cache.mask & flags) == 0)
6168f62c
WAA		 2586 return 0;
2587
998f40b5 2588 return -EACCES;
6168f62c
WAA		 2589}
2590
b257957e
AB		 2591/*
2592 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2593 */
3b65a30d
FI		 2594static int _nfs4_proc_open(struct nfs4_opendata *data,
2595 struct nfs_open_context *ctx)
b257957e 2596{
2b0143b5 2597 struct inode *dir = d_inode(data->dir);
b257957e
AB		 2598 struct nfs_server *server = NFS_SERVER(dir);
2599 struct nfs_openargs *o_arg = &data->o_arg;
2600 struct nfs_openres *o_res = &data->o_res;
2601 int status;
2602
3b65a30d 2603 status = nfs4_run_open_task(data, ctx);
08ef7bd3
TM		 2604 if (!data->rpc_done)
2605 return status;
2606 if (status != 0) {
2607 if (status == -NFS4ERR_BADNAME &&
2608 !(o_arg->open_flags & O_CREAT))
2609 return -ENOENT;
24ac23ab 2610 return status;
08ef7bd3 2611 }
24ac23ab 2612
6926afd1
TM		 2613 nfs_fattr_map_and_free_names(server, &data->f_attr);
2614
5bc2afc2 2615 if (o_arg->open_flags & O_CREAT) {
5bc2afc2 2616 if (o_arg->open_flags & O_EXCL)
a7a3b1e9 2617 data->file_created = true;
5bc2afc2 2618 else if (o_res->cinfo.before != o_res->cinfo.after)
a7a3b1e9 2619 data->file_created = true;
1eb5d98f
JL		 2620 if (data->file_created ||
2621 inode_peek_iversion_raw(dir) != o_res->cinfo.after)
d3129ef6 2622 update_changeattr(dir, &o_res->cinfo,
5636ec4e 2623 o_res->f_attr->time_start, 0);
5bc2afc2 2624 }
0df5dd4a
TM		 2625 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2626 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 2627 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 2628 status = _nfs4_proc_open_confirm(data);
1da177e4 2629 if (status != 0)
24ac23ab 2630 return status;
1da177e4 2631 }
56e0d71e
TM		 2632 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR)) {
2633 nfs4_sequence_free_slot(&o_res->seq_res);
a841b54d
TM		 2634 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr,
2635 o_res->f_label, NULL);
56e0d71e 2636 }
24ac23ab 2637 return 0;
1da177e4
LT		 2638}
2639
1da177e4
LT		 2640/*
2641 * OPEN_EXPIRED:
2642 * reclaim state on the server after a network partition.
2643 * Assumes caller holds the appropriate lock
2644 */
539cd03a 2645static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 2646{
e56e0b78 2647 struct nfs4_opendata *opendata;
864472e9 2648 int ret;
1da177e4 2649
4a1c0893 2650 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 2651 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 2652 if (IS_ERR(opendata))
2653 return PTR_ERR(opendata);
864472e9 2654 ret = nfs4_open_recover(opendata, state);
35d05778 2655 if (ret == -ESTALE)
3d4ff43d 2656 d_drop(ctx->dentry);
c6d00e63 2657 nfs4_opendata_put(opendata);
864472e9 2658 return ret;
1da177e4
LT		 2659}
2660
a9ed2e25 2661static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 2662{
539cd03a 2663 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 2664 struct nfs4_exception exception = { };
2665 int err;
2666
2667 do {
539cd03a 2668 err = _nfs4_open_expired(ctx, state);
42113a75 2669 trace_nfs4_open_expired(ctx, 0, err);
49f9a0fa
TM		 2670 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2671 continue;
a9ed2e25
TM		 2672 switch (err) {
2673 default:
2674 goto out;
2675 case -NFS4ERR_GRACE:
2676 case -NFS4ERR_DELAY:
2677 nfs4_handle_exception(server, err, &exception);
2678 err = 0;
2679 }
202b50dc 2680 } while (exception.retry);
a9ed2e25 2681out:
202b50dc
TM		 2682 return err;
2683}
2684
1da177e4
LT		 2685static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2686{
1da177e4 2687 struct nfs_open_context *ctx;
864472e9 2688 int ret;
1da177e4 2689
864472e9
TM		 2690 ctx = nfs4_state_find_open_context(state);
2691 if (IS_ERR(ctx))
91876b13 2692 return -EAGAIN;
539cd03a 2693 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 2694 put_nfs_open_context(ctx);
2695 return ret;
1da177e4
LT		 2696}
2697
41020b67
TM		 2698static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state,
2699 const nfs4_stateid *stateid)
4dfd4f7a 2700{
41020b67 2701 nfs_remove_bad_delegation(state->inode, stateid);
9f0c5124 2702 nfs_state_clear_delegation(state);
4dfd4f7a
TM		 2703}
2704
2705static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
2706{
2707 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
41020b67 2708 nfs_finish_clear_delegation_stateid(state, NULL);
4dfd4f7a
TM		 2709}
2710
2711static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2712{
2713 /* NFSv4.0 doesn't allow for delegation recovery on open expire */
2714 nfs40_clear_delegation_stateid(state);
27a30cf6 2715 nfs_state_clear_open_state_flags(state);
4dfd4f7a
TM		 2716 return nfs4_open_expired(sp, state);
2717}
2718
45870d69
TM		 2719static int nfs40_test_and_free_expired_stateid(struct nfs_server *server,
2720 nfs4_stateid *stateid,
a52458b4 2721 const struct cred *cred)
45870d69
TM		 2722{
2723 return -NFS4ERR_BAD_STATEID;
2724}
2725
f062eb6c 2726#if defined(CONFIG_NFS_V4_1)
4586f6e2
TM		 2727static int nfs41_test_and_free_expired_stateid(struct nfs_server *server,
2728 nfs4_stateid *stateid,
a52458b4 2729 const struct cred *cred)
4586f6e2
TM		 2730{
2731 int status;
2732
f7a62ada
TM		 2733 switch (stateid->type) {
2734 default:
2735 break;
2736 case NFS4_INVALID_STATEID_TYPE:
2737 case NFS4_SPECIAL_STATEID_TYPE:
2738 return -NFS4ERR_BAD_STATEID;
2739 case NFS4_REVOKED_STATEID_TYPE:
2740 goto out_free;
2741 }
4586f6e2 2742
f7a62ada 2743 status = nfs41_test_stateid(server, stateid, cred);
4586f6e2
TM		 2744 switch (status) {
2745 case -NFS4ERR_EXPIRED:
2746 case -NFS4ERR_ADMIN_REVOKED:
2747 case -NFS4ERR_DELEG_REVOKED:
f7a62ada
TM		 2748 break;
2749 default:
4586f6e2
TM		 2750 return status;
2751 }
f7a62ada
TM		 2752out_free:
2753 /* Ack the revoked state to the server */
f0b0bf88 2754 nfs41_free_stateid(server, stateid, cred, true);
f7a62ada 2755 return -NFS4ERR_EXPIRED;
4586f6e2
TM		 2756}
2757
27a30cf6 2758static int nfs41_check_delegation_stateid(struct nfs4_state *state)
f062eb6c 2759{
f062eb6c 2760 struct nfs_server *server = NFS_SERVER(state->inode);
0c116cad 2761 nfs4_stateid stateid;
ab7cb0df 2762 struct nfs_delegation *delegation;
a52458b4 2763 const struct cred *cred = NULL;
27a30cf6 2764 int status, ret = NFS_OK;
3e60ffdd 2765
ab7cb0df
TM		 2766 /* Get the delegation credential for use by test/free_stateid */
2767 rcu_read_lock();
2768 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
0c116cad 2769 if (delegation == NULL) {
ab7cb0df 2770 rcu_read_unlock();
9f0c5124 2771 nfs_state_clear_delegation(state);
27a30cf6 2772 return NFS_OK;
0c116cad
TM		 2773 }
2774
2775 nfs4_stateid_copy(&stateid, &delegation->stateid);
0c116cad 2776
994b15b9
TM		 2777 if (!test_and_clear_bit(NFS_DELEGATION_TEST_EXPIRED,
2778 &delegation->flags)) {
4c8e5447 2779 rcu_read_unlock();
27a30cf6 2780 return NFS_OK;
4c8e5447 2781 }
0c116cad 2782
a52458b4
N		 2783 if (delegation->cred)
2784 cred = get_cred(delegation->cred);
0c116cad 2785 rcu_read_unlock();
4586f6e2 2786 status = nfs41_test_and_free_expired_stateid(server, &stateid, cred);
0c116cad 2787 trace_nfs4_test_delegation_stateid(state, NULL, status);
f7a62ada 2788 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID)
41020b67 2789 nfs_finish_clear_delegation_stateid(state, &stateid);
27a30cf6
TM		 2790 else
2791 ret = status;
ab7cb0df 2792
8c39a39e 2793 put_cred(cred);
27a30cf6
TM		 2794 return ret;
2795}
2796
2797static void nfs41_delegation_recover_stateid(struct nfs4_state *state)
2798{
2799 nfs4_stateid tmp;
2800
2801 if (test_bit(NFS_DELEGATED_STATE, &state->flags) &&
2802 nfs4_copy_delegation_stateid(state->inode, state->state,
2803 &tmp, NULL) &&
2804 nfs4_stateid_match_other(&state->stateid, &tmp))
2805 nfs_state_set_delegation(state, &tmp, state->state);
2806 else
2807 nfs_state_clear_delegation(state);
3e60ffdd
CL		 2808}
2809
c5896fc8
TM		 2810/**
2811 * nfs41_check_expired_locks - possibly free a lock stateid
2812 *
2813 * @state: NFSv4 state for an inode
2814 *
2815 * Returns NFS_OK if recovery for this stateid is now finished.
2816 * Otherwise a negative NFS4ERR value is returned.
2817 */
2818static int nfs41_check_expired_locks(struct nfs4_state *state)
2819{
2820 int status, ret = NFS_OK;
d75a6a0e 2821 struct nfs4_lock_state *lsp, *prev = NULL;
c5896fc8
TM		 2822 struct nfs_server *server = NFS_SERVER(state->inode);
2823
2824 if (!test_bit(LK_STATE_IN_USE, &state->flags))
2825 goto out;
d75a6a0e
BC		 2826
2827 spin_lock(&state->state_lock);
c5896fc8
TM		 2828 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
2829 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
a52458b4 2830 const struct cred *cred = lsp->ls_state->owner->so_cred;
c5896fc8 2831
194bc1f4 2832 refcount_inc(&lsp->ls_count);
d75a6a0e
BC		 2833 spin_unlock(&state->state_lock);
2834
2835 nfs4_put_lock_state(prev);
2836 prev = lsp;
2837
c5896fc8
TM		 2838 status = nfs41_test_and_free_expired_stateid(server,
2839 &lsp->ls_stateid,
2840 cred);
2841 trace_nfs4_test_lock_stateid(state, lsp, status);
2842 if (status == -NFS4ERR_EXPIRED ||
2843 status == -NFS4ERR_BAD_STATEID) {
2844 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
67dd4830 2845 lsp->ls_stateid.type = NFS4_INVALID_STATEID_TYPE;
c5896fc8
TM		 2846 if (!recover_lost_locks)
2847 set_bit(NFS_LOCK_LOST, &lsp->ls_flags);
2848 } else if (status != NFS_OK) {
2849 ret = status;
d75a6a0e
BC		 2850 nfs4_put_lock_state(prev);
2851 goto out;
c5896fc8 2852 }
d75a6a0e 2853 spin_lock(&state->state_lock);
c5896fc8 2854 }
d75a6a0e
BC		 2855 }
2856 spin_unlock(&state->state_lock);
2857 nfs4_put_lock_state(prev);
c5896fc8
TM		 2858out:
2859 return ret;
2860}
2861
3e60ffdd
CL		 2862/**
2863 * nfs41_check_open_stateid - possibly free an open stateid
2864 *
2865 * @state: NFSv4 state for an inode
2866 *
2867 * Returns NFS_OK if recovery for this stateid is now finished.
2868 * Otherwise a negative NFS4ERR value is returned.
2869 */
2870static int nfs41_check_open_stateid(struct nfs4_state *state)
2871{
2872 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 2873 nfs4_stateid *stateid = &state->open_stateid;
a52458b4 2874 const struct cred *cred = state->owner->so_cred;
3e60ffdd
CL		 2875 int status;
2876
27a30cf6 2877 if (test_bit(NFS_OPEN_STATE, &state->flags) == 0)
3e60ffdd 2878 return -NFS4ERR_BAD_STATEID;
4586f6e2 2879 status = nfs41_test_and_free_expired_stateid(server, stateid, cred);
08cb47fa 2880 trace_nfs4_test_open_stateid(state, NULL, status);
f7a62ada 2881 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID) {
27a30cf6 2882 nfs_state_clear_open_state_flags(state);
67dd4830 2883 stateid->type = NFS4_INVALID_STATEID_TYPE;
8a64c4ef 2884 return status;
c0ca0e59 2885 }
8a64c4ef
TM		 2886 if (nfs_open_stateid_recover_openmode(state))
2887 return -NFS4ERR_OPENMODE;
2888 return NFS_OK;
b01dd1d8
BS		 2889}
2890
2891static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2892{
eb64cf96 2893 int status;
b01dd1d8 2894
27a30cf6
TM		 2895 status = nfs41_check_delegation_stateid(state);
2896 if (status != NFS_OK)
2897 return status;
2898 nfs41_delegation_recover_stateid(state);
2899
c5896fc8
TM		 2900 status = nfs41_check_expired_locks(state);
2901 if (status != NFS_OK)
2902 return status;
3e60ffdd 2903 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 2904 if (status != NFS_OK)
2905 status = nfs4_open_expired(sp, state);
2906 return status;
f062eb6c
BS		 2907}
2908#endif
2909
aa53ed54
JL		 2910/*
2911 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2912 * fields corresponding to attributes that were used to store the verifier.
2913 * Make sure we clobber those fields in the later setattr call
2914 */
609339c1 2915static unsigned nfs4_exclusive_attrset(struct nfs4_opendata *opendata,
5334c5bd 2916 struct iattr *sattr, struct nfs4_label **label)
aa53ed54 2917{
609339c1
TM		 2918 const __u32 *bitmask = opendata->o_arg.server->exclcreat_bitmask;
2919 __u32 attrset[3];
2920 unsigned ret;
2921 unsigned i;
5334c5bd 2922
609339c1
TM		 2923 for (i = 0; i < ARRAY_SIZE(attrset); i++) {
2924 attrset[i] = opendata->o_res.attrset[i];
2925 if (opendata->o_arg.createmode == NFS4_CREATE_EXCLUSIVE4_1)
2926 attrset[i] &= ~bitmask[i];
2927 }
2928
2929 ret = (opendata->o_arg.createmode == NFS4_CREATE_EXCLUSIVE) ?
2930 sattr->ia_valid : 0;
aa53ed54 2931
609339c1
TM		 2932 if ((attrset[1] & (FATTR4_WORD1_TIME_ACCESS|FATTR4_WORD1_TIME_ACCESS_SET))) {
2933 if (sattr->ia_valid & ATTR_ATIME_SET)
2934 ret |= ATTR_ATIME_SET;
2935 else
2936 ret |= ATTR_ATIME;
2937 }
5334c5bd 2938
609339c1
TM		 2939 if ((attrset[1] & (FATTR4_WORD1_TIME_MODIFY|FATTR4_WORD1_TIME_MODIFY_SET))) {
2940 if (sattr->ia_valid & ATTR_MTIME_SET)
2941 ret |= ATTR_MTIME_SET;
2942 else
2943 ret |= ATTR_MTIME;
2944 }
5334c5bd 2945
609339c1 2946 if (!(attrset[2] & FATTR4_WORD2_SECURITY_LABEL))
5334c5bd 2947 *label = NULL;
609339c1 2948 return ret;
aa53ed54
JL		 2949}
2950
c21443c2 2951static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
1bf85d8c 2952 int flags, struct nfs_open_context *ctx)
c21443c2
TM		 2953{
2954 struct nfs4_state_owner *sp = opendata->owner;
2955 struct nfs_server *server = sp->so_server;
275bb307 2956 struct dentry *dentry;
c21443c2 2957 struct nfs4_state *state;
1bf85d8c 2958 fmode_t acc_mode = _nfs4_ctx_to_accessmode(ctx);
c21443c2
TM		 2959 unsigned int seq;
2960 int ret;
2961
2962 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2963
3b65a30d 2964 ret = _nfs4_proc_open(opendata, ctx);
dca78001 2965 if (ret != 0)
c21443c2
TM		 2966 goto out;
2967
ae55e59d 2968 state = _nfs4_opendata_to_nfs4_state(opendata);
c21443c2
TM		 2969 ret = PTR_ERR(state);
2970 if (IS_ERR(state))
2971 goto out;
a974deee 2972 ctx->state = state;
c21443c2
TM		 2973 if (server->caps & NFS_CAP_POSIX_LOCK)
2974 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
a8ce377a
JL		 2975 if (opendata->o_res.rflags & NFS4_OPEN_RESULT_MAY_NOTIFY_LOCK)
2976 set_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags);
c21443c2 2977
275bb307 2978 dentry = opendata->dentry;
2b0143b5 2979 if (d_really_is_negative(dentry)) {
668d0cd5 2980 struct dentry *alias;
275bb307 2981 d_drop(dentry);
668d0cd5
AV		 2982 alias = d_exact_alias(dentry, state->inode);
2983 if (!alias)
2984 alias = d_splice_alias(igrab(state->inode), dentry);
2985 /* d_splice_alias() can't fail here - it's a non-directory */
2986 if (alias) {
275bb307 2987 dput(ctx->dentry);
668d0cd5 2988 ctx->dentry = dentry = alias;
275bb307
TM		 2989 }
2990 nfs_set_verifier(dentry,
2b0143b5 2991 nfs_save_change_attribute(d_inode(opendata->dir)));
275bb307
TM		 2992 }
2993
af9b6d75
TM		 2994 /* Parse layoutget results before we check for access */
2995 pnfs_parse_lgopen(state->inode, opendata->lgp, ctx);
2996
1bf85d8c
TM		 2997 ret = nfs4_opendata_access(sp->so_cred, opendata, state,
2998 acc_mode, flags);
c21443c2
TM		 2999 if (ret != 0)
3000 goto out;
3001
2b0143b5 3002 if (d_inode(dentry) == state->inode) {
c45ffdd2
TM		 3003 nfs_inode_attach_open_context(ctx);
3004 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
3005 nfs4_schedule_stateid_recovery(server, state);
3006 }
2409a976 3007
c21443c2 3008out:
0cb98abb
OK		 3009 if (!opendata->cancelled)
3010 nfs4_sequence_free_slot(&opendata->o_res.seq_res);
c21443c2
TM		 3011 return ret;
3012}
3013
1da177e4 3014/*
24ac23ab 3015 * Returns a referenced nfs4_state
1da177e4 3016 */
82be417a 3017static int _nfs4_do_open(struct inode *dir,
4197a055 3018 struct nfs_open_context *ctx,
82be417a 3019 int flags,
8fd1ab74 3020 const struct nfs4_open_createattrs *c,
5bc2afc2 3021 int *opened)
1da177e4
LT		 3022{
3023 struct nfs4_state_owner *sp;
3024 struct nfs4_state *state = NULL;
3025 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 3026 struct nfs4_opendata *opendata;
4197a055 3027 struct dentry *dentry = ctx->dentry;
a52458b4 3028 const struct cred *cred = ctx->cred;
4197a055 3029 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
1bf85d8c 3030 fmode_t fmode = _nfs4_ctx_to_openmode(ctx);
49f9a0fa 3031 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
8fd1ab74
TM		 3032 struct iattr *sattr = c->sattr;
3033 struct nfs4_label *label = c->label;
1775fd3e 3034 struct nfs4_label *olabel = NULL;
aac00a8d 3035 int status;
1da177e4
LT		 3036
3037 /* Protect against reboot recovery conflicts */
1da177e4 3038 status = -ENOMEM;
d1e284d5
TM		 3039 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
3040 if (sp == NULL) {
1da177e4
LT		 3041 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
3042 goto out_err;
3043 }
334f87dd 3044 status = nfs4_client_recover_expired_lease(server->nfs_client);
58d9714a 3045 if (status != 0)
b4454fe1 3046 goto err_put_state_owner;
2b0143b5
DH		 3047 if (d_really_is_positive(dentry))
3048 nfs4_return_incompatible_delegation(d_inode(dentry), fmode);
58d9714a 3049 status = -ENOMEM;
2b0143b5 3050 if (d_really_is_positive(dentry))
49f9a0fa 3051 claim = NFS4_OPEN_CLAIM_FH;
8fd1ab74
TM		 3052 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags,
3053 c, claim, GFP_KERNEL);
e56e0b78 3054 if (opendata == NULL)
95d35cb4 3055 goto err_put_state_owner;
1da177e4 3056
14c43f76
DQ		 3057 if (label) {
3058 olabel = nfs4_label_alloc(server, GFP_KERNEL);
3059 if (IS_ERR(olabel)) {
3060 status = PTR_ERR(olabel);
3061 goto err_opendata_put;
3062 }
3063 }
3064
e911b815
TM		 3065 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
3066 if (!opendata->f_attr.mdsthreshold) {
3067 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
3068 if (!opendata->f_attr.mdsthreshold)
3069 goto err_free_label;
3070 }
1549210f 3071 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 3072 }
2b0143b5
DH		 3073 if (d_really_is_positive(dentry))
3074 opendata->state = nfs4_get_open_state(d_inode(dentry), sp);
aac00a8d 3075
1bf85d8c 3076 status = _nfs4_open_and_get_state(opendata, flags, ctx);
6168f62c 3077 if (status != 0)
14c43f76 3078 goto err_free_label;
3efb9722 3079 state = ctx->state;
6168f62c 3080
efcbc04e 3081 if ((opendata->o_arg.open_flags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) &&
549b19cc 3082 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
609339c1 3083 unsigned attrs = nfs4_exclusive_attrset(opendata, sattr, &label);
a1d1c4f1
TM		 3084 /*
3085 * send create attributes which was not set by open
3086 * with an extra setattr.
3087 */
609339c1
TM		 3088 if (attrs || label) {
3089 unsigned ia_old = sattr->ia_valid;
3090
3091 sattr->ia_valid = attrs;
a1d1c4f1
TM		 3092 nfs_fattr_init(opendata->o_res.f_attr);
3093 status = nfs4_do_setattr(state->inode, cred,
3094 opendata->o_res.f_attr, sattr,
29b59f94 3095 ctx, label, olabel);
a1d1c4f1
TM		 3096 if (status == 0) {
3097 nfs_setattr_update_inode(state->inode, sattr,
3098 opendata->o_res.f_attr);
3099 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
3100 }
609339c1 3101 sattr->ia_valid = ia_old;
1775fd3e 3102 }
0ab64e0e 3103 }
c5c3fb5f 3104 if (opened && opendata->file_created)
73a09dd9 3105 *opened = 1;
82be417a 3106
e911b815 3107 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
82be417a 3108 *ctx_th = opendata->f_attr.mdsthreshold;
e911b815
TM		 3109 opendata->f_attr.mdsthreshold = NULL;
3110 }
82be417a 3111
14c43f76
DQ		 3112 nfs4_label_free(olabel);
3113
c6d00e63 3114 nfs4_opendata_put(opendata);
1da177e4 3115 nfs4_put_state_owner(sp);
1da177e4 3116 return 0;
14c43f76
DQ		 3117err_free_label:
3118 nfs4_label_free(olabel);
c6d00e63
TM		 3119err_opendata_put:
3120 nfs4_opendata_put(opendata);
e56e0b78
TM		 3121err_put_state_owner:
3122 nfs4_put_state_owner(sp);
1da177e4 3123out_err:
1da177e4
LT		 3124 return status;
3125}
3126
3127
82be417a 3128static struct nfs4_state *nfs4_do_open(struct inode *dir,
4197a055 3129 struct nfs_open_context *ctx,
82be417a
AA		 3130 int flags,
3131 struct iattr *sattr,
5bc2afc2
TM		 3132 struct nfs4_label *label,
3133 int *opened)
1da177e4 3134{
49f9a0fa 3135 struct nfs_server *server = NFS_SERVER(dir);
0688e64b
TM		 3136 struct nfs4_exception exception = {
3137 .interruptible = true,
3138 };
1da177e4 3139 struct nfs4_state *res;
8fd1ab74
TM		 3140 struct nfs4_open_createattrs c = {
3141 .label = label,
3142 .sattr = sattr,
3143 .verf = {
3144 [0] = (__u32)jiffies,
3145 [1] = (__u32)current->pid,
3146 },
3147 };
1da177e4
LT		 3148 int status;
3149
3150 do {
8fd1ab74 3151 status = _nfs4_do_open(dir, ctx, flags, &c, opened);
3efb9722 3152 res = ctx->state;
42113a75 3153 trace_nfs4_open_file(ctx, flags, status);
1da177e4
LT		 3154 if (status == 0)
3155 break;
3156 /* NOTE: BAD_SEQID means the server and client disagree about the
3157 * book-keeping w.r.t. state-changing operations
3158 * (OPEN/CLOSE/LOCK/LOCKU...)
3159 * It is actually a sign of a bug on the client or on the server.
3160 *
3161 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 3162 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 3163 * have unhashed the old state_owner for us, and that we can
3164 * therefore safely retry using a new one. We should still warn
3165 * the user though...
3166 */
3167 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 3168 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 3169 " returned a bad sequence-id error!\n",
3170 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 3171 exception.retry = 1;
3172 continue;
3173 }
550f5747
TM		 3174 /*
3175 * BAD_STATEID on OPEN means that the server cancelled our
3176 * state before it received the OPEN_CONFIRM.
3177 * Recover by retrying the request as per the discussion
3178 * on Page 181 of RFC3530.
3179 */
3180 if (status == -NFS4ERR_BAD_STATEID) {
3181 exception.retry = 1;
3182 continue;
3183 }
aac00a8d
TM		 3184 if (status == -EAGAIN) {
3185 /* We must have found a delegation */
3186 exception.retry = 1;
3187 continue;
3188 }
49f9a0fa
TM		 3189 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
3190 continue;
3191 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 3192 status, &exception));
3193 } while (exception.retry);
3194 return res;
3195}
3196
8487c479
TM		 3197static int _nfs4_do_setattr(struct inode *inode,
3198 struct nfs_setattrargs *arg,
3199 struct nfs_setattrres *res,
a52458b4 3200 const struct cred *cred,
29b59f94 3201 struct nfs_open_context *ctx)
1da177e4 3202{
3e4f6290 3203 struct nfs_server *server = NFS_SERVER(inode);
d9b67e1e 3204 struct rpc_message msg = {
659bfcd6 3205 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
8487c479
TM		 3206 .rpc_argp = arg,
3207 .rpc_resp = res,
659bfcd6 3208 .rpc_cred = cred,
d9b67e1e 3209 };
a52458b4 3210 const struct cred *delegation_cred = NULL;
26e976a8 3211 unsigned long timestamp = jiffies;
ee3ae84e 3212 bool truncate;
65e4308d 3213 int status;
1da177e4 3214
8487c479 3215 nfs_fattr_init(res->fattr);
1da177e4 3216
ee3ae84e 3217 /* Servers should only apply open mode checks for file size changes */
8487c479 3218 truncate = (arg->iap->ia_valid & ATTR_SIZE) ? true : false;
991eedb1
TM		 3219 if (!truncate)
3220 goto zero_stateid;
ee3ae84e 3221
991eedb1 3222 if (nfs4_copy_delegation_stateid(inode, FMODE_WRITE, &arg->stateid, &delegation_cred)) {
ee3ae84e 3223 /* Use that stateid */
09a54f0e 3224 } else if (ctx != NULL && ctx->state) {
17393475 3225 struct nfs_lock_context *l_ctx;
29b59f94 3226 if (!nfs4_valid_open_stateid(ctx->state))
0418dae1 3227 return -EBADF;
17393475
N		 3228 l_ctx = nfs_get_lock_context(ctx);
3229 if (IS_ERR(l_ctx))
3230 return PTR_ERR(l_ctx);
7a0566b3
N		 3231 status = nfs4_select_rw_stateid(ctx->state, FMODE_WRITE, l_ctx,
3232 &arg->stateid, &delegation_cred);
3233 nfs_put_lock_context(l_ctx);
3234 if (status == -EIO)
0418dae1 3235 return -EBADF;
991eedb1
TM		 3236 } else {
3237zero_stateid:
8487c479 3238 nfs4_stateid_copy(&arg->stateid, &zero_stateid);
991eedb1 3239 }
abf4e13c
TM		 3240 if (delegation_cred)
3241 msg.rpc_cred = delegation_cred;
1da177e4 3242
8487c479 3243 status = nfs4_call_sync(server->client, server, &msg, &arg->seq_args, &res->seq_res, 1);
abf4e13c 3244
a52458b4 3245 put_cred(delegation_cred);
29b59f94 3246 if (status == 0 && ctx != NULL)
26e976a8 3247 renew_lease(server, timestamp);
8487c479 3248 trace_nfs4_setattr(inode, &arg->stateid, status);
65e4308d 3249 return status;
1da177e4
LT		 3250}
3251
a52458b4 3252static int nfs4_do_setattr(struct inode *inode, const struct cred *cred,
659bfcd6 3253 struct nfs_fattr *fattr, struct iattr *sattr,
29b59f94 3254 struct nfs_open_context *ctx, struct nfs4_label *ilabel,
1775fd3e 3255 struct nfs4_label *olabel)
1da177e4 3256{
3e4f6290 3257 struct nfs_server *server = NFS_SERVER(inode);
30846df0 3258 __u32 bitmask[NFS4_BITMASK_SZ];
29b59f94 3259 struct nfs4_state *state = ctx ? ctx->state : NULL;
d9b67e1e
AS		 3260 struct nfs_setattrargs arg = {
3261 .fh = NFS_FH(inode),
3262 .iap = sattr,
8487c479 3263 .server = server,
30846df0 3264 .bitmask = bitmask,
8487c479 3265 .label = ilabel,
d9b67e1e
AS		 3266 };
3267 struct nfs_setattrres res = {
8487c479
TM		 3268 .fattr = fattr,
3269 .label = olabel,
3270 .server = server,
d9b67e1e 3271 };
a1d0b5ee
TM		 3272 struct nfs4_exception exception = {
3273 .state = state,
3114ea7a 3274 .inode = inode,
8487c479 3275 .stateid = &arg.stateid,
a1d0b5ee 3276 };
1da177e4 3277 int err;
8487c479 3278
1da177e4 3279 do {
30846df0
TM		 3280 nfs4_bitmap_copy_adjust_setattr(bitmask,
3281 nfs4_bitmask(server, olabel),
3282 inode);
3283
29b59f94 3284 err = _nfs4_do_setattr(inode, &arg, &res, cred, ctx);
451146be
TM		 3285 switch (err) {
3286 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 3287 if (!(sattr->ia_valid & ATTR_SIZE)) {
3288 pr_warn_once("NFSv4: server %s is incorrectly "
3289 "applying open mode checks to "
3290 "a SETATTR that is not "
3291 "changing file size.\n",
3292 server->nfs_client->cl_hostname);
3293 }
451146be
TM		 3294 if (state && !(state->state & FMODE_WRITE)) {
3295 err = -EBADF;
3296 if (sattr->ia_valid & ATTR_OPEN)
3297 err = -EACCES;
3298 goto out;
3299 }
3300 }
3301 err = nfs4_handle_exception(server, err, &exception);
1da177e4 3302 } while (exception.retry);
451146be 3303out:
1da177e4
LT		 3304 return err;
3305}
3306
500d701f
PT		 3307static bool
3308nfs4_wait_on_layoutreturn(struct inode *inode, struct rpc_task *task)
3309{
3310 if (inode == NULL || !nfs_have_layout(inode))
3311 return false;
3312
3313 return pnfs_wait_on_layoutreturn(inode, task);
3314}
3315
0e0cb35b
TM		 3316/*
3317 * Update the seqid of an open stateid
3318 */
3319static void nfs4_sync_open_stateid(nfs4_stateid *dst,
3320 struct nfs4_state *state)
3321{
3322 __be32 seqid_open;
3323 u32 dst_seqid;
3324 int seq;
3325
3326 for (;;) {
3327 if (!nfs4_valid_open_stateid(state))
3328 break;
3329 seq = read_seqbegin(&state->seqlock);
3330 if (!nfs4_state_match_open_stateid_other(state, dst)) {
3331 nfs4_stateid_copy(dst, &state->open_stateid);
3332 if (read_seqretry(&state->seqlock, seq))
3333 continue;
3334 break;
3335 }
3336 seqid_open = state->open_stateid.seqid;
3337 if (read_seqretry(&state->seqlock, seq))
3338 continue;
3339
3340 dst_seqid = be32_to_cpu(dst->seqid);
3341 if ((s32)(dst_seqid - be32_to_cpu(seqid_open)) < 0)
3342 dst->seqid = seqid_open;
3343 break;
3344 }
3345}
3346
3347/*
3348 * Update the seqid of an open stateid after receiving
3349 * NFS4ERR_OLD_STATEID
3350 */
3351static bool nfs4_refresh_open_old_stateid(nfs4_stateid *dst,
3352 struct nfs4_state *state)
3353{
3354 __be32 seqid_open;
3355 u32 dst_seqid;
3356 bool ret;
3357 int seq;
3358
3359 for (;;) {
3360 ret = false;
3361 if (!nfs4_valid_open_stateid(state))
3362 break;
3363 seq = read_seqbegin(&state->seqlock);
3364 if (!nfs4_state_match_open_stateid_other(state, dst)) {
3365 if (read_seqretry(&state->seqlock, seq))
3366 continue;
3367 break;
3368 }
3369 seqid_open = state->open_stateid.seqid;
3370 if (read_seqretry(&state->seqlock, seq))
3371 continue;
3372
3373 dst_seqid = be32_to_cpu(dst->seqid);
3374 if ((s32)(dst_seqid - be32_to_cpu(seqid_open)) >= 0)
3375 dst->seqid = cpu_to_be32(dst_seqid + 1);
3376 else
3377 dst->seqid = seqid_open;
3378 ret = true;
3379 break;
3380 }
3381
3382 return ret;
3383}
3384
1da177e4
LT		 3385struct nfs4_closedata {
3386 struct inode *inode;
3387 struct nfs4_state *state;
3388 struct nfs_closeargs arg;
3389 struct nfs_closeres res;
cf805165
TM		 3390 struct {
3391 struct nfs4_layoutreturn_args arg;
3392 struct nfs4_layoutreturn_res res;
4d796d75 3393 struct nfs4_xdr_opaque_data ld_private;
cf805165
TM		 3394 u32 roc_barrier;
3395 bool roc;
3396 } lr;
516a6af6 3397 struct nfs_fattr fattr;
26e976a8 3398 unsigned long timestamp;
1da177e4
LT		 3399};
3400
963d8fe5 3401static void nfs4_free_closedata(void *data)
9512135d 3402{
963d8fe5
TM		 3403 struct nfs4_closedata *calldata = data;
3404 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 3405 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 3406
cf805165 3407 if (calldata->lr.roc)
1c5bd76d
TM		 3408 pnfs_roc_release(&calldata->lr.arg, &calldata->lr.res,
3409 calldata->res.lr_ret);
9512135d
TM		 3410 nfs4_put_open_state(calldata->state);
3411 nfs_free_seqid(calldata->arg.seqid);
9512135d 3412 nfs4_put_state_owner(sp);
322b2b90 3413 nfs_sb_deactive(sb);
9512135d
TM		 3414 kfree(calldata);
3415}
3416
963d8fe5 3417static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 3418{
963d8fe5 3419 struct nfs4_closedata *calldata = data;
1da177e4 3420 struct nfs4_state *state = calldata->state;
1da177e4 3421 struct nfs_server *server = NFS_SERVER(calldata->inode);
412f6c4c 3422 nfs4_stateid *res_stateid = NULL;
b8b8d221
TM		 3423 struct nfs4_exception exception = {
3424 .state = state,
3425 .inode = calldata->inode,
3426 .stateid = &calldata->arg.stateid,
3427 };
1da177e4 3428
a3ca5651 3429 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 3430 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
3431 return;
42113a75 3432 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
cf805165
TM		 3433
3434 /* Handle Layoutreturn errors */
287a9c55
TM		 3435 if (pnfs_roc_done(task, calldata->inode,
3436 &calldata->arg.lr_args,
3437 &calldata->res.lr_res,
3438 &calldata->res.lr_ret) == -EAGAIN)
3439 goto out_restart;
cf805165 3440
d9b67e1e 3441 /* hmm. we are done with the inode, and in the process of freeing
1da177e4
LT		 3442 * the state_owner. we keep this around to process errors
3443 */
1da177e4
LT		 3444 switch (task->tk_status) {
3445 case 0:
412f6c4c 3446 res_stateid = &calldata->res.stateid;
26e976a8 3447 renew_lease(server, calldata->timestamp);
412f6c4c 3448 break;
f07d4a31
TM		 3449 case -NFS4ERR_ACCESS:
3450 if (calldata->arg.bitmask != NULL) {
3451 calldata->arg.bitmask = NULL;
3452 calldata->res.fattr = NULL;
91b30d2e 3453 goto out_restart;
f07d4a31
TM		 3454
3455 }
3456 break;
12f275cd
TM		 3457 case -NFS4ERR_OLD_STATEID:
3458 /* Did we race with OPEN? */
0e0cb35b 3459 if (nfs4_refresh_open_old_stateid(&calldata->arg.stateid,
91b30d2e
TM		 3460 state))
3461 goto out_restart;
12f275cd 3462 goto out_release;
69794ad7 3463 case -NFS4ERR_ADMIN_REVOKED:
1da177e4 3464 case -NFS4ERR_STALE_STATEID:
26d36301
TM		 3465 case -NFS4ERR_EXPIRED:
3466 nfs4_free_revoked_stateid(server,
3467 &calldata->arg.stateid,
3468 task->tk_msg.rpc_cred);
12f275cd 3469 /* Fallthrough */
9e33bed5 3470 case -NFS4ERR_BAD_STATEID:
e217e825
TM		 3471 if (calldata->arg.fmode == 0)
3472 break;
3473 /* Fallthrough */
1da177e4 3474 default:
b8b8d221
TM		 3475 task->tk_status = nfs4_async_handle_exception(task,
3476 server, task->tk_status, &exception);
3477 if (exception.retry)
91b30d2e 3478 goto out_restart;
1da177e4 3479 }
4a1e2feb
TM		 3480 nfs_clear_open_stateid(state, &calldata->arg.stateid,
3481 res_stateid, calldata->arg.fmode);
69794ad7 3482out_release:
91b30d2e 3483 task->tk_status = 0;
72211dbe 3484 nfs_release_seqid(calldata->arg.seqid);
d8d84983 3485 nfs_refresh_inode(calldata->inode, &calldata->fattr);
a3ca5651 3486 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
91b30d2e 3487 return;
91b30d2e
TM		 3488out_restart:
3489 task->tk_status = 0;
3490 rpc_restart_call_prepare(task);
3491 goto out_release;
1da177e4
LT		 3492}
3493
4ce70ada 3494static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 3495{
4ce70ada 3496 struct nfs4_closedata *calldata = data;
9512135d 3497 struct nfs4_state *state = calldata->state;
7fdab069 3498 struct inode *inode = calldata->inode;
c8bf7073 3499 struct pnfs_layout_hdr *lo;
aee7af35 3500 bool is_rdonly, is_wronly, is_rdwr;
88069f77 3501 int call_close = 0;
9512135d 3502
a3ca5651 3503 dprintk("%s: begin!\n", __func__);
963d8fe5 3504 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 3505 goto out_wait;
003707c7 3506
88069f77 3507 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
4cecb76f 3508 spin_lock(&state->owner->so_lock);
aee7af35
TM		 3509 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
3510 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
3511 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
003707c7 3512 /* Calculate the change in open mode */
cd9288ff 3513 calldata->arg.fmode = 0;
e7616923 3514 if (state->n_rdwr == 0) {
cd9288ff
TM		 3515 if (state->n_rdonly == 0)
3516 call_close |= is_rdonly;
3517 else if (is_rdonly)
3518 calldata->arg.fmode |= FMODE_READ;
3519 if (state->n_wronly == 0)
3520 call_close |= is_wronly;
3521 else if (is_wronly)
3522 calldata->arg.fmode |= FMODE_WRITE;
e547f262
TM		 3523 if (calldata->arg.fmode != (FMODE_READ|FMODE_WRITE))
3524 call_close |= is_rdwr;
cd9288ff
TM		 3525 } else if (is_rdwr)
3526 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
3527
0e0cb35b
TM		 3528 nfs4_sync_open_stateid(&calldata->arg.stateid, state);
3529 if (!nfs4_valid_open_stateid(state))
5d422301 3530 call_close = 0;
4cecb76f 3531 spin_unlock(&state->owner->so_lock);
88069f77
TM		 3532
3533 if (!call_close) {
963d8fe5 3534 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 3535 goto out_no_action;
9512135d 3536 }
88069f77 3537
1c5bd76d 3538 if (!calldata->lr.roc && nfs4_wait_on_layoutreturn(inode, task)) {
500d701f
PT		 3539 nfs_release_seqid(calldata->arg.seqid);
3540 goto out_wait;
3541 }
3542
c8bf7073
TM		 3543 lo = calldata->arg.lr_args ? calldata->arg.lr_args->layout : NULL;
3544 if (lo && !pnfs_layout_is_valid(lo)) {
3545 calldata->arg.lr_args = NULL;
3546 calldata->res.lr_res = NULL;
3547 }
3548
9413a1a1 3549 if (calldata->arg.fmode == 0)
88069f77 3550 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
3ecefc92 3551
9413a1a1 3552 if (calldata->arg.fmode == 0 || calldata->arg.fmode == FMODE_READ) {
3ecefc92
TM		 3553 /* Close-to-open cache consistency revalidation */
3554 if (!nfs4_have_delegation(inode, FMODE_READ))
3555 calldata->arg.bitmask = NFS_SERVER(inode)->cache_consistency_bitmask;
3556 else
3557 calldata->arg.bitmask = NULL;
3558 }
3c13cb5b 3559
6ae37339
TM		 3560 calldata->arg.share_access =
3561 nfs4_map_atomic_open_share(NFS_SERVER(inode),
3562 calldata->arg.fmode, 0);
88069f77 3563
d8d84983
TM		 3564 if (calldata->res.fattr == NULL)
3565 calldata->arg.bitmask = NULL;
3566 else if (calldata->arg.bitmask == NULL)
3567 calldata->res.fattr = NULL;
26e976a8 3568 calldata->timestamp = jiffies;
42e1cca7 3569 if (nfs4_setup_sequence(NFS_SERVER(inode)->nfs_client,
9d12b216
TM		 3570 &calldata->arg.seq_args,
3571 &calldata->res.seq_res,
2240a9e2
TM		 3572 task) != 0)
3573 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 3574 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 3575 return;
3576out_no_action:
3577 task->tk_action = NULL;
3578out_wait:
3579 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 3580}
3581
963d8fe5 3582static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 3583 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 3584 .rpc_call_done = nfs4_close_done,
3585 .rpc_release = nfs4_free_closedata,
3586};
3587
1da177e4
LT		 3588/*
3589 * It is possible for data to be read/written from a mem-mapped file
3590 * after the sys_close call (which hits the vfs layer as a flush).
3591 * This means that we can't safely call nfsv4 close on a file until
3592 * the inode is cleared. This in turn means that we are not good
3593 * NFSv4 citizens - we do not indicate to the server to update the file's
3594 * share state even when we are done with one of the three share
3595 * stateid's in the inode.
3596 *
3597 * NOTE: Caller must be holding the sp->so_owner semaphore!
3598 */
1f7977c1 3599int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 3600{
4a35bd41 3601 struct nfs_server *server = NFS_SERVER(state->inode);
63f5f796 3602 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
1da177e4 3603 struct nfs4_closedata *calldata;
b39e625b
TM		 3604 struct nfs4_state_owner *sp = state->owner;
3605 struct rpc_task *task;
5138fde0
TM		 3606 struct rpc_message msg = {
3607 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
3608 .rpc_cred = state->owner->so_cred,
3609 };
c970aa85
TM		 3610 struct rpc_task_setup task_setup_data = {
3611 .rpc_client = server->client,
5138fde0 3612 .rpc_message = &msg,
c970aa85 3613 .callback_ops = &nfs4_close_ops,
101070ca 3614 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3615 .flags = RPC_TASK_ASYNC,
3616 };
9512135d 3617 int status = -ENOMEM;
1da177e4 3618
fa940720
WAA		 3619 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
3620 &task_setup_data.rpc_client, &msg);
3621
8535b2be 3622 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 3623 if (calldata == NULL)
9512135d 3624 goto out;
fba83f34 3625 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1, 0);
4a35bd41 3626 calldata->inode = state->inode;
1da177e4 3627 calldata->state = state;
4a35bd41 3628 calldata->arg.fh = NFS_FH(state->inode);
c82bac6f
TM		 3629 if (!nfs4_copy_open_stateid(&calldata->arg.stateid, state))
3630 goto out_free_calldata;
1da177e4 3631 /* Serialization for the sequence id */
63f5f796
TM		 3632 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
3633 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask);
badc76dd 3634 if (IS_ERR(calldata->arg.seqid))
9512135d 3635 goto out_free_calldata;
d8d84983 3636 nfs_fattr_init(&calldata->fattr);
dc0b027d 3637 calldata->arg.fmode = 0;
4d796d75 3638 calldata->lr.arg.ld_private = &calldata->lr.ld_private;
516a6af6 3639 calldata->res.fattr = &calldata->fattr;
c1d51931 3640 calldata->res.seqid = calldata->arg.seqid;
516a6af6 3641 calldata->res.server = server;
cf805165 3642 calldata->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
1c5bd76d
TM		 3643 calldata->lr.roc = pnfs_roc(state->inode,
3644 &calldata->lr.arg, &calldata->lr.res, msg.rpc_cred);
3645 if (calldata->lr.roc) {
3646 calldata->arg.lr_args = &calldata->lr.arg;
3647 calldata->res.lr_res = &calldata->lr.res;
3648 }
643168c2 3649 nfs_sb_active(calldata->inode->i_sb);
9512135d 3650
1174dd1f
TM		 3651 msg.rpc_argp = &calldata->arg;
3652 msg.rpc_resp = &calldata->res;
c970aa85
TM		 3653 task_setup_data.callback_data = calldata;
3654 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 3655 if (IS_ERR(task))
3656 return PTR_ERR(task);
a49c3c77
TM		 3657 status = 0;
3658 if (wait)
3659 status = rpc_wait_for_completion_task(task);
b39e625b 3660 rpc_put_task(task);
a49c3c77 3661 return status;
9512135d
TM		 3662out_free_calldata:
3663 kfree(calldata);
3664out:
b39e625b
TM		 3665 nfs4_put_open_state(state);
3666 nfs4_put_state_owner(sp);
9512135d 3667 return status;
1da177e4
LT		 3668}
3669
2b484297 3670static struct inode *
5bc2afc2
TM		 3671nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
3672 int open_flags, struct iattr *attr, int *opened)
1da177e4 3673{
1da177e4 3674 struct nfs4_state *state;
aa9c2669
DQ		 3675 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
3676
3677 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
1da177e4 3678
565277f6 3679 /* Protect against concurrent sillydeletes */
5bc2afc2 3680 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
aa9c2669
DQ		 3681
3682 nfs4_label_release_security(label);
3683
f46e0bd3
TM		 3684 if (IS_ERR(state))
3685 return ERR_CAST(state);
275bb307 3686 return state->inode;
1da177e4
LT		 3687}
3688
1185a552 3689static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 3690{
3691 if (ctx->state == NULL)
3692 return;
3693 if (is_sync)
1bf85d8c 3694 nfs4_close_sync(ctx->state, _nfs4_ctx_to_openmode(ctx));
7fe5c398 3695 else
1bf85d8c 3696 nfs4_close_state(ctx->state, _nfs4_ctx_to_openmode(ctx));
7fe5c398 3697}
1da177e4 3698
b944dba3
TM		 3699#define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
3700#define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
dff25ddb 3701#define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_MODE_UMASK - 1UL)
b944dba3 3702
1da177e4
LT		 3703static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
3704{
8c61282f 3705 u32 bitmask[3] = {}, minorversion = server->nfs_client->cl_minorversion;
43652ad5
BH		 3706 struct nfs4_server_caps_arg args = {
3707 .fhandle = fhandle,
8c61282f 3708 .bitmask = bitmask,
43652ad5 3709 };
1da177e4
LT		 3710 struct nfs4_server_caps_res res = {};
3711 struct rpc_message msg = {
3712 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 3713 .rpc_argp = &args,
1da177e4
LT		 3714 .rpc_resp = &res,
3715 };
3716 int status;
f4b23de3 3717 int i;
1da177e4 3718
8c61282f
KM		 3719 bitmask[0] = FATTR4_WORD0_SUPPORTED_ATTRS |
3720 FATTR4_WORD0_FH_EXPIRE_TYPE |
3721 FATTR4_WORD0_LINK_SUPPORT |
3722 FATTR4_WORD0_SYMLINK_SUPPORT |
3723 FATTR4_WORD0_ACLSUPPORT;
3724 if (minorversion)
3725 bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3726
7c513058 3727 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3728 if (status == 0) {
b944dba3 3729 /* Sanity check the server answers */
8c61282f 3730 switch (minorversion) {
b944dba3
TM		 3731 case 0:
3732 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
3733 res.attr_bitmask[2] = 0;
3734 break;
3735 case 1:
3736 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
3737 break;
3738 case 2:
3739 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
3740 }
1da177e4 3741 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 3742 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
3743 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
3744 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
3745 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
b944dba3
TM		 3746 NFS_CAP_CTIME|NFS_CAP_MTIME|
3747 NFS_CAP_SECURITY_LABEL);
7dd7d959
MN		 3748 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
3749 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
1da177e4
LT		 3750 server->caps |= NFS_CAP_ACLS;
3751 if (res.has_links != 0)
3752 server->caps |= NFS_CAP_HARDLINKS;
3753 if (res.has_symlinks != 0)
3754 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 3755 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
3756 server->caps |= NFS_CAP_FILEID;
3757 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
3758 server->caps |= NFS_CAP_MODE;
3759 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
3760 server->caps |= NFS_CAP_NLINK;
3761 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
3762 server->caps |= NFS_CAP_OWNER;
3763 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
3764 server->caps |= NFS_CAP_OWNER_GROUP;
3765 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
3766 server->caps |= NFS_CAP_ATIME;
3767 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
3768 server->caps |= NFS_CAP_CTIME;
3769 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
3770 server->caps |= NFS_CAP_MTIME;
aa9c2669
DQ		 3771#ifdef CONFIG_NFS_V4_SECURITY_LABEL
3772 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
3773 server->caps |= NFS_CAP_SECURITY_LABEL;
3774#endif
3775 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
3776 sizeof(server->attr_bitmask));
b944dba3 3777 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
62ab460c 3778
a65318bf
TM		 3779 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
3780 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
3781 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
b944dba3 3782 server->cache_consistency_bitmask[2] = 0;
f4b23de3
TM		 3783
3784 /* Avoid a regression due to buggy server */
3785 for (i = 0; i < ARRAY_SIZE(res.exclcreat_bitmask); i++)
3786 res.exclcreat_bitmask[i] &= res.attr_bitmask[i];
8c61282f
KM		 3787 memcpy(server->exclcreat_bitmask, res.exclcreat_bitmask,
3788 sizeof(server->exclcreat_bitmask));
f4b23de3 3789
1da177e4 3790 server->acl_bitmask = res.acl_bitmask;
264e6351 3791 server->fh_expire_type = res.fh_expire_type;
1da177e4 3792 }
cccef3b9 3793
1da177e4
LT		 3794 return status;
3795}
3796
55a97593 3797int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4 3798{
0688e64b
TM		 3799 struct nfs4_exception exception = {
3800 .interruptible = true,
3801 };
1da177e4
LT		 3802 int err;
3803 do {
3804 err = nfs4_handle_exception(server,
3805 _nfs4_server_capabilities(server, fhandle),
3806 &exception);
3807 } while (exception.retry);
3808 return err;
3809}
3810
3811static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3812 struct nfs_fsinfo *info)
3813{
aa9c2669 3814 u32 bitmask[3];
1da177e4 3815 struct nfs4_lookup_root_arg args = {
aa9c2669 3816 .bitmask = bitmask,
1da177e4
LT		 3817 };
3818 struct nfs4_lookup_res res = {
3819 .server = server,
0e574af1 3820 .fattr = info->fattr,
1da177e4
LT		 3821 .fh = fhandle,
3822 };
3823 struct rpc_message msg = {
3824 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
3825 .rpc_argp = &args,
3826 .rpc_resp = &res,
3827 };
008f55d0 3828
aa9c2669
DQ		 3829 bitmask[0] = nfs4_fattr_bitmap[0];
3830 bitmask[1] = nfs4_fattr_bitmap[1];
3831 /*
3832 * Process the label in the upcoming getfattr
3833 */
3834 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
3835
0e574af1 3836 nfs_fattr_init(info->fattr);
7c513058 3837 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3838}
3839
3840static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3841 struct nfs_fsinfo *info)
3842{
0688e64b
TM		 3843 struct nfs4_exception exception = {
3844 .interruptible = true,
3845 };
1da177e4
LT		 3846 int err;
3847 do {
fb8a5ba8 3848 err = _nfs4_lookup_root(server, fhandle, info);
b5f875a9 3849 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
fb8a5ba8
BS		 3850 switch (err) {
3851 case 0:
3852 case -NFS4ERR_WRONGSEC:
05e9cfb4 3853 goto out;
fb8a5ba8
BS		 3854 default:
3855 err = nfs4_handle_exception(server, err, &exception);
3856 }
1da177e4 3857 } while (exception.retry);
05e9cfb4 3858out:
1da177e4
LT		 3859 return err;
3860}
3861
8f70e95f
BS		 3862static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3863 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
3864{
c2190661
TM		 3865 struct rpc_auth_create_args auth_args = {
3866 .pseudoflavor = flavor,
3867 };
8f70e95f 3868 struct rpc_auth *auth;
8f70e95f 3869
c2190661 3870 auth = rpcauth_create(&auth_args, server->client);
9df1336c
AS		 3871 if (IS_ERR(auth))
3872 return -EACCES;
3873 return nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 3874}
3875
9a744ba3
CL		 3876/*
3877 * Retry pseudoroot lookup with various security flavors. We do this when:
3878 *
3879 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
3880 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
3881 *
3882 * Returns zero on success, or a negative NFS4ERR value, or a
3883 * negative errno value.
3884 */
801a16dc 3885static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 3886 struct nfs_fsinfo *info)
1da177e4 3887{
9a744ba3
CL		 3888 /* Per 3530bis 15.33.5 */
3889 static const rpc_authflavor_t flav_array[] = {
3890 RPC_AUTH_GSS_KRB5P,
3891 RPC_AUTH_GSS_KRB5I,
3892 RPC_AUTH_GSS_KRB5,
c4eafe11 3893 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 3894 RPC_AUTH_NULL,
3895 };
3896 int status = -EPERM;
3897 size_t i;
6a1a1e34 3898
4d4b69dd
WAA		 3899 if (server->auth_info.flavor_len > 0) {
3900 /* try each flavor specified by user */
3901 for (i = 0; i < server->auth_info.flavor_len; i++) {
3902 status = nfs4_lookup_root_sec(server, fhandle, info,
3903 server->auth_info.flavors[i]);
3904 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3905 continue;
3906 break;
3907 }
3908 } else {
3909 /* no flavors specified by user, try default list */
3910 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3911 status = nfs4_lookup_root_sec(server, fhandle, info,
3912 flav_array[i]);
3913 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3914 continue;
3915 break;
3916 }
8f70e95f 3917 }
9a744ba3 3918
fb8a5ba8 3919 /*
d3787af2 3920 * -EACCES could mean that the user doesn't have correct permissions
fb8a5ba8
BS		 3921 * to access the mount. It could also mean that we tried to mount
3922 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
3923 * existing mount programs don't handle -EACCES very well so it should
3924 * be mapped to -EPERM instead.
3925 */
3926 if (status == -EACCES)
3927 status = -EPERM;
801a16dc
BS		 3928 return status;
3929}
3930
2ed4b95b
CL		 3931/**
3932 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
3933 * @server: initialized nfs_server handle
3934 * @fhandle: we fill in the pseudo-fs root file handle
3935 * @info: we fill in an FSINFO struct
5e6b1990 3936 * @auth_probe: probe the auth flavours
2ed4b95b
CL		 3937 *
3938 * Returns zero on success, or a negative errno.
801a16dc 3939 */
3028eb2b 3940int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
5e6b1990
TM		 3941 struct nfs_fsinfo *info,
3942 bool auth_probe)
801a16dc 3943{
c7757074 3944 int status = 0;
2ed4b95b 3945
c7757074 3946 if (!auth_probe)
5e6b1990 3947 status = nfs4_lookup_root(server, fhandle, info);
c7757074
AP		 3948
3949 if (auth_probe || status == NFS4ERR_WRONGSEC)
698c937b
TM		 3950 status = server->nfs_client->cl_mvops->find_root_sec(server,
3951 fhandle, info);
2ed4b95b 3952
1da177e4
LT		 3953 if (status == 0)
3954 status = nfs4_server_capabilities(server, fhandle);
3955 if (status == 0)
3956 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 3957
c12e87f4 3958 return nfs4_map_errors(status);
1da177e4
LT		 3959}
3960
bae36241
BS		 3961static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3962 struct nfs_fsinfo *info)
3963{
3964 int error;
3965 struct nfs_fattr *fattr = info->fattr;
1775fd3e 3966 struct nfs4_label *label = NULL;
bae36241
BS		 3967
3968 error = nfs4_server_capabilities(server, mntfh);
3969 if (error < 0) {
3970 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3971 return error;
3972 }
3973
14c43f76
DQ		 3974 label = nfs4_label_alloc(server, GFP_KERNEL);
3975 if (IS_ERR(label))
3976 return PTR_ERR(label);
3977
a841b54d 3978 error = nfs4_proc_getattr(server, mntfh, fattr, label, NULL);
bae36241
BS		 3979 if (error < 0) {
3980 dprintk("nfs4_get_root: getattr error = %d\n", -error);
14c43f76 3981 goto err_free_label;
bae36241
BS		 3982 }
3983
3984 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3985 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3986 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3987
14c43f76
DQ		 3988err_free_label:
3989 nfs4_label_free(label);
3990
bae36241
BS		 3991 return error;
3992}
3993
6b97fd3d
MN		 3994/*
3995 * Get locations and (maybe) other attributes of a referral.
3996 * Note that we'll actually follow the referral later when
3997 * we detect fsid mismatch in inode revalidation
3998 */
f05d147f
BS		 3999static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
4000 const struct qstr *name, struct nfs_fattr *fattr,
4001 struct nfs_fh *fhandle)
6b97fd3d
MN		 4002{
4003 int status = -ENOMEM;
4004 struct page *page = NULL;
4005 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 4006
4007 page = alloc_page(GFP_KERNEL);
4008 if (page == NULL)
4009 goto out;
4010 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
4011 if (locations == NULL)
4012 goto out;
4013
f05d147f 4014 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 4015 if (status != 0)
4016 goto out;
519ae255
CL		 4017
4018 /*
4019 * If the fsid didn't change, this is a migration event, not a
4020 * referral. Cause us to drop into the exception handler, which
4021 * will kick off migration recovery.
4022 */
6b97fd3d 4023 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 4024 dprintk("%s: server did not return a different fsid for"
4025 " a referral at %s\n", __func__, name->name);
519ae255 4026 status = -NFS4ERR_MOVED;
6b97fd3d
MN		 4027 goto out;
4028 }
533eb461
AA		 4029 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
4030 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 4031
533eb461 4032 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 4033 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 4034 memset(fhandle, 0, sizeof(struct nfs_fh));
4035out:
4036 if (page)
4037 __free_page(page);
5d7ca35a 4038 kfree(locations);
6b97fd3d
MN		 4039 return status;
4040}
4041
1775fd3e 4042static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
a841b54d
TM		 4043 struct nfs_fattr *fattr, struct nfs4_label *label,
4044 struct inode *inode)
1da177e4 4045{
771734f2 4046 __u32 bitmask[NFS4_BITMASK_SZ];
1da177e4
LT		 4047 struct nfs4_getattr_arg args = {
4048 .fh = fhandle,
771734f2 4049 .bitmask = bitmask,
1da177e4
LT		 4050 };
4051 struct nfs4_getattr_res res = {
4052 .fattr = fattr,
1775fd3e 4053 .label = label,
1da177e4
LT		 4054 .server = server,
4055 };
4056 struct rpc_message msg = {
4057 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
4058 .rpc_argp = &args,
4059 .rpc_resp = &res,
4060 };
aa9c2669 4061
771734f2 4062 nfs4_bitmap_copy_adjust(bitmask, nfs4_bitmask(server, label), inode);
aa9c2669 4063
0e574af1 4064 nfs_fattr_init(fattr);
7c513058 4065 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4066}
4067
1775fd3e 4068static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
a841b54d
TM		 4069 struct nfs_fattr *fattr, struct nfs4_label *label,
4070 struct inode *inode)
1da177e4 4071{
0688e64b
TM		 4072 struct nfs4_exception exception = {
4073 .interruptible = true,
4074 };
1da177e4
LT		 4075 int err;
4076 do {
a841b54d 4077 err = _nfs4_proc_getattr(server, fhandle, fattr, label, inode);
b5f875a9
TM		 4078 trace_nfs4_getattr(server, fhandle, fattr, err);
4079 err = nfs4_handle_exception(server, err,
1da177e4
LT		 4080 &exception);
4081 } while (exception.retry);
4082 return err;
4083}
4084
4085/*
4086 * The file is not closed if it is opened due to the a request to change
4087 * the size of the file. The open call will not be needed once the
4088 * VFS layer lookup-intents are implemented.
4089 *
4090 * Close is called when the inode is destroyed.
4091 * If we haven't opened the file for O_WRONLY, we
4092 * need to in the size_change case to obtain a stateid.
4093 *
4094 * Got race?
4095 * Because OPEN is always done by name in nfsv4, it is
4096 * possible that we opened a different file by the same
4097 * name. We can recognize this race condition, but we
4098 * can't do anything about it besides returning an error.
4099 *
4100 * This will be fixed with VFS changes (lookup-intent).
4101 */
4102static int
4103nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
4104 struct iattr *sattr)
4105{
2b0143b5 4106 struct inode *inode = d_inode(dentry);
a52458b4 4107 const struct cred *cred = NULL;
29b59f94 4108 struct nfs_open_context *ctx = NULL;
14c43f76 4109 struct nfs4_label *label = NULL;
1da177e4
LT		 4110 int status;
4111
88ac815c
PT		 4112 if (pnfs_ld_layoutret_on_setattr(inode) &&
4113 sattr->ia_valid & ATTR_SIZE &&
4114 sattr->ia_size < i_size_read(inode))
24028672 4115 pnfs_commit_and_return_layout(inode);
8a1636c4 4116
0e574af1 4117 nfs_fattr_init(fattr);
1da177e4 4118
2669940d
AA		 4119 /* Deal with open(O_TRUNC) */
4120 if (sattr->ia_valid & ATTR_OPEN)
cc7936f9 4121 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2669940d
AA		 4122
4123 /* Optimization: if the end result is no change, don't RPC */
cc7936f9 4124 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2669940d
AA		 4125 return 0;
4126
d530838b 4127 /* Search for an existing open(O_WRITE) file */
659bfcd6 4128 if (sattr->ia_valid & ATTR_FILE) {
659bfcd6
TM		 4129
4130 ctx = nfs_file_open_context(sattr->ia_file);
29b59f94 4131 if (ctx)
504e5189 4132 cred = ctx->cred;
659bfcd6 4133 }
08e9eac4 4134
14c43f76
DQ		 4135 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
4136 if (IS_ERR(label))
4137 return PTR_ERR(label);
4138
199366f0
TM		 4139 /* Return any delegations if we're going to change ACLs */
4140 if ((sattr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0)
c01d3645 4141 nfs4_inode_make_writeable(inode);
199366f0 4142
29b59f94 4143 status = nfs4_do_setattr(inode, cred, fattr, sattr, ctx, NULL, label);
aa9c2669 4144 if (status == 0) {
f044636d 4145 nfs_setattr_update_inode(inode, sattr, fattr);
aa9c2669
DQ		 4146 nfs_setsecurity(inode, fattr, label);
4147 }
14c43f76 4148 nfs4_label_free(label);
1da177e4
LT		 4149 return status;
4150}
4151
0c2e53f1
TM		 4152static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
4153 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 4154 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 4155{
0c2e53f1 4156 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 4157 int status;
4158 struct nfs4_lookup_arg args = {
4159 .bitmask = server->attr_bitmask,
0c2e53f1 4160 .dir_fh = NFS_FH(dir),
2b3de441
DH		 4161 .name = name,
4162 };
4163 struct nfs4_lookup_res res = {
4164 .server = server,
4165 .fattr = fattr,
aa9c2669 4166 .label = label,
2b3de441
DH		 4167 .fh = fhandle,
4168 };
4169 struct rpc_message msg = {
4170 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
4171 .rpc_argp = &args,
4172 .rpc_resp = &res,
4173 };
4174
aa9c2669
DQ		 4175 args.bitmask = nfs4_bitmask(server, label);
4176
2b3de441
DH		 4177 nfs_fattr_init(fattr);
4178
1da177e4 4179 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 4180 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4181 dprintk("NFS reply lookup: %d\n", status);
4182 return status;
4183}
4184
72de53ec 4185static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 4186{
7ebb9315 4187 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 4188 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 4189 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4190 fattr->nlink = 2;
4191}
4192
72de53ec 4193static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
beffb8fe 4194 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 4195 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4 4196{
0688e64b
TM		 4197 struct nfs4_exception exception = {
4198 .interruptible = true,
4199 };
72de53ec 4200 struct rpc_clnt *client = *clnt;
1da177e4
LT		 4201 int err;
4202 do {
1775fd3e 4203 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
078ea3df 4204 trace_nfs4_lookup(dir, name, err);
72de53ec 4205 switch (err) {
08ef7bd3 4206 case -NFS4ERR_BADNAME:
72de53ec
BS		 4207 err = -ENOENT;
4208 goto out;
0c2e53f1 4209 case -NFS4ERR_MOVED:
f05d147f 4210 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
c86c90c6
DM		 4211 if (err == -NFS4ERR_MOVED)
4212 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
72de53ec 4213 goto out;
0c2e53f1 4214 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 4215 err = -EPERM;
4216 if (client != *clnt)
4217 goto out;
66b06860 4218 client = nfs4_negotiate_security(client, dir, name);
72de53ec
BS		 4219 if (IS_ERR(client))
4220 return PTR_ERR(client);
4221
4222 exception.retry = 1;
4223 break;
4224 default:
4225 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 4226 }
1da177e4 4227 } while (exception.retry);
72de53ec
BS		 4228
4229out:
4230 if (err == 0)
4231 *clnt = client;
4232 else if (client != *clnt)
4233 rpc_shutdown_client(client);
4234
1da177e4
LT		 4235 return err;
4236}
4237
beffb8fe 4238static int nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1775fd3e
DQ		 4239 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
4240 struct nfs4_label *label)
72de53ec
BS		 4241{
4242 int status;
4243 struct rpc_clnt *client = NFS_CLIENT(dir);
4244
1775fd3e 4245 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
72de53ec
BS		 4246 if (client != NFS_CLIENT(dir)) {
4247 rpc_shutdown_client(client);
4248 nfs_fixup_secinfo_attributes(fattr);
4249 }
4250 return status;
4251}
4252
f05d147f 4253struct rpc_clnt *
beffb8fe 4254nfs4_proc_lookup_mountpoint(struct inode *dir, const struct qstr *name,
f05d147f
BS		 4255 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
4256{
b72888cb 4257 struct rpc_clnt *client = NFS_CLIENT(dir);
f05d147f 4258 int status;
f05d147f 4259
1775fd3e 4260 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
b72888cb 4261 if (status < 0)
f05d147f 4262 return ERR_PTR(status);
b72888cb 4263 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
f05d147f
BS		 4264}
4265
5b5faaf6
JL		 4266static int _nfs4_proc_lookupp(struct inode *inode,
4267 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
4268 struct nfs4_label *label)
4269{
4270 struct rpc_clnt *clnt = NFS_CLIENT(inode);
4271 struct nfs_server *server = NFS_SERVER(inode);
4272 int status;
4273 struct nfs4_lookupp_arg args = {
4274 .bitmask = server->attr_bitmask,
4275 .fh = NFS_FH(inode),
4276 };
4277 struct nfs4_lookupp_res res = {
4278 .server = server,
4279 .fattr = fattr,
4280 .label = label,
4281 .fh = fhandle,
4282 };
4283 struct rpc_message msg = {
4284 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUPP],
4285 .rpc_argp = &args,
4286 .rpc_resp = &res,
4287 };
4288
4289 args.bitmask = nfs4_bitmask(server, label);
4290
4291 nfs_fattr_init(fattr);
4292
4293 dprintk("NFS call lookupp ino=0x%lx\n", inode->i_ino);
4294 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
4295 &res.seq_res, 0);
4296 dprintk("NFS reply lookupp: %d\n", status);
4297 return status;
4298}
4299
4300static int nfs4_proc_lookupp(struct inode *inode, struct nfs_fh *fhandle,
4301 struct nfs_fattr *fattr, struct nfs4_label *label)
4302{
0688e64b
TM		 4303 struct nfs4_exception exception = {
4304 .interruptible = true,
4305 };
5b5faaf6
JL		 4306 int err;
4307 do {
4308 err = _nfs4_proc_lookupp(inode, fhandle, fattr, label);
4309 trace_nfs4_lookupp(inode, err);
4310 err = nfs4_handle_exception(NFS_SERVER(inode), err,
4311 &exception);
4312 } while (exception.retry);
4313 return err;
4314}
4315
1da177e4
LT		 4316static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
4317{
76b32999 4318 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 4319 struct nfs4_accessargs args = {
4320 .fh = NFS_FH(inode),
1750d929 4321 .access = entry->mask,
76b32999
TM		 4322 };
4323 struct nfs4_accessres res = {
4324 .server = server,
1da177e4 4325 };
1da177e4
LT		 4326 struct rpc_message msg = {
4327 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
4328 .rpc_argp = &args,
4329 .rpc_resp = &res,
4330 .rpc_cred = entry->cred,
4331 };
aa9c2669 4332 int status = 0;
1da177e4 4333
7c672654 4334 if (!nfs4_have_delegation(inode, FMODE_READ)) {
8bcbe7d9
TM		 4335 res.fattr = nfs_alloc_fattr();
4336 if (res.fattr == NULL)
4337 return -ENOMEM;
4338 args.bitmask = server->cache_consistency_bitmask;
4339 }
7c513058 4340 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 4341 if (!status) {
6168f62c 4342 nfs_access_set_mask(entry, res.access);
8bcbe7d9
TM		 4343 if (res.fattr)
4344 nfs_refresh_inode(inode, res.fattr);
1da177e4 4345 }
c407d41a 4346 nfs_free_fattr(res.fattr);
1da177e4
LT		 4347 return status;
4348}
4349
4350static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
4351{
0688e64b
TM		 4352 struct nfs4_exception exception = {
4353 .interruptible = true,
4354 };
1da177e4
LT		 4355 int err;
4356 do {
c1578b76
TM		 4357 err = _nfs4_proc_access(inode, entry);
4358 trace_nfs4_access(inode, err);
4359 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 4360 &exception);
4361 } while (exception.retry);
4362 return err;
4363}
4364
4365/*
4366 * TODO: For the time being, we don't try to get any attributes
4367 * along with any of the zero-copy operations READ, READDIR,
4368 * READLINK, WRITE.
4369 *
4370 * In the case of the first three, we want to put the GETATTR
4371 * after the read-type operation -- this is because it is hard
4372 * to predict the length of a GETATTR response in v4, and thus
4373 * align the READ data correctly. This means that the GETATTR
4374 * may end up partially falling into the page cache, and we should
4375 * shift it into the 'tail' of the xdr_buf before processing.
4376 * To do this efficiently, we need to know the total length
4377 * of data received, which doesn't seem to be available outside
4378 * of the RPC layer.
4379 *
4380 * In the case of WRITE, we also want to put the GETATTR after
4381 * the operation -- in this case because we want to make sure
140150db 4382 * we get the post-operation mtime and size.
1da177e4
LT		 4383 *
4384 * Both of these changes to the XDR layer would in fact be quite
4385 * minor, but I decided to leave them for a subsequent patch.
4386 */
4387static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
4388 unsigned int pgbase, unsigned int pglen)
4389{
4390 struct nfs4_readlink args = {
4391 .fh = NFS_FH(inode),
4392 .pgbase = pgbase,
4393 .pglen = pglen,
4394 .pages = &page,
4395 };
f50c7000 4396 struct nfs4_readlink_res res;
1da177e4
LT		 4397 struct rpc_message msg = {
4398 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
4399 .rpc_argp = &args,
f50c7000 4400 .rpc_resp = &res,
1da177e4
LT		 4401 };
4402
7c513058 4403 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4404}
4405
4406static int nfs4_proc_readlink(struct inode *inode, struct page *page,
4407 unsigned int pgbase, unsigned int pglen)
4408{
0688e64b
TM		 4409 struct nfs4_exception exception = {
4410 .interruptible = true,
4411 };
1da177e4
LT		 4412 int err;
4413 do {
c1578b76
TM		 4414 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
4415 trace_nfs4_readlink(inode, err);
4416 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 4417 &exception);
4418 } while (exception.retry);
4419 return err;
4420}
4421
1da177e4 4422/*
8867fe58 4423 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 4424 */
1da177e4
LT		 4425static int
4426nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 4427 int flags)
1da177e4 4428{
dff25ddb 4429 struct nfs_server *server = NFS_SERVER(dir);
aa9c2669 4430 struct nfs4_label l, *ilabel = NULL;
8867fe58 4431 struct nfs_open_context *ctx;
1da177e4 4432 struct nfs4_state *state;
1da177e4
LT		 4433 int status = 0;
4434
532d4def 4435 ctx = alloc_nfs_open_context(dentry, FMODE_READ, NULL);
8867fe58
MS		 4436 if (IS_ERR(ctx))
4437 return PTR_ERR(ctx);
4438
aa9c2669
DQ		 4439 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
4440
dff25ddb
AG		 4441 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
4442 sattr->ia_mode &= ~current_umask();
c5c3fb5f 4443 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, NULL);
1da177e4
LT		 4444 if (IS_ERR(state)) {
4445 status = PTR_ERR(state);
c0204fd2 4446 goto out;
1da177e4 4447 }
1da177e4 4448out:
aa9c2669 4449 nfs4_label_release_security(ilabel);
8867fe58 4450 put_nfs_open_context(ctx);
1da177e4
LT		 4451 return status;
4452}
4453
3c591175
TM		 4454static int
4455_nfs4_proc_remove(struct inode *dir, const struct qstr *name, u32 ftype)
1da177e4 4456{
16e42959 4457 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 4458 struct nfs_removeargs args = {
1da177e4 4459 .fh = NFS_FH(dir),
26fe5750 4460 .name = *name,
16e42959 4461 };
4fdc17b2 4462 struct nfs_removeres res = {
16e42959 4463 .server = server,
1da177e4 4464 };
1da177e4 4465 struct rpc_message msg = {
4fdc17b2
TM		 4466 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
4467 .rpc_argp = &args,
4468 .rpc_resp = &res,
1da177e4 4469 };
d3129ef6 4470 unsigned long timestamp = jiffies;
778d2817 4471 int status;
1da177e4 4472
7c513058 4473 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
3c591175
TM		 4474 if (status == 0) {
4475 spin_lock(&dir->i_lock);
5636ec4e 4476 update_changeattr_locked(dir, &res.cinfo, timestamp, 0);
3c591175
TM		 4477 /* Removing a directory decrements nlink in the parent */
4478 if (ftype == NF4DIR && dir->i_nlink > 2)
4479 nfs4_dec_nlink_locked(dir);
4480 spin_unlock(&dir->i_lock);
4481 }
1da177e4
LT		 4482 return status;
4483}
4484
912678db 4485static int nfs4_proc_remove(struct inode *dir, struct dentry *dentry)
1da177e4 4486{
0688e64b
TM		 4487 struct nfs4_exception exception = {
4488 .interruptible = true,
4489 };
912678db 4490 struct inode *inode = d_inode(dentry);
1da177e4 4491 int err;
912678db 4492
c01d3645
TM		 4493 if (inode) {
4494 if (inode->i_nlink == 1)
4495 nfs4_inode_return_delegation(inode);
4496 else
4497 nfs4_inode_make_writeable(inode);
4498 }
912678db 4499 do {
3c591175 4500 err = _nfs4_proc_remove(dir, &dentry->d_name, NF4REG);
912678db
TM		 4501 trace_nfs4_remove(dir, &dentry->d_name, err);
4502 err = nfs4_handle_exception(NFS_SERVER(dir), err,
4503 &exception);
4504 } while (exception.retry);
4505 return err;
4506}
4507
4508static int nfs4_proc_rmdir(struct inode *dir, const struct qstr *name)
4509{
0688e64b
TM		 4510 struct nfs4_exception exception = {
4511 .interruptible = true,
4512 };
912678db
TM		 4513 int err;
4514
1da177e4 4515 do {
3c591175 4516 err = _nfs4_proc_remove(dir, name, NF4DIR);
078ea3df
TM		 4517 trace_nfs4_remove(dir, name, err);
4518 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4519 &exception);
4520 } while (exception.retry);
4521 return err;
4522}
4523
ed7e9ad0
TM		 4524static void nfs4_proc_unlink_setup(struct rpc_message *msg,
4525 struct dentry *dentry,
4526 struct inode *inode)
1da177e4 4527{
e4eff1a6
TM		 4528 struct nfs_removeargs *args = msg->rpc_argp;
4529 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 4530
977fcc2b 4531 res->server = NFS_SB(dentry->d_sb);
1da177e4 4532 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
fba83f34 4533 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1, 0);
aa9c2669
DQ		 4534
4535 nfs_fattr_init(res->dir_attr);
977fcc2b
TM		 4536
4537 if (inode)
4538 nfs4_inode_return_delegation(inode);
1da177e4
LT		 4539}
4540
34e137cc
BS		 4541static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
4542{
42e1cca7 4543 nfs4_setup_sequence(NFS_SB(data->dentry->d_sb)->nfs_client,
d9afbd1b
TM		 4544 &data->args.seq_args,
4545 &data->res.seq_res,
4546 task);
1da177e4
LT		 4547}
4548
e4eff1a6 4549static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 4550{
078ea3df
TM		 4551 struct nfs_unlinkdata *data = task->tk_calldata;
4552 struct nfs_removeres *res = &data->res;
e4eff1a6 4553
14516c3a
TM		 4554 if (!nfs4_sequence_done(task, &res->seq_res))
4555 return 0;
8478eaa1
N		 4556 if (nfs4_async_handle_error(task, res->server, NULL,
4557 &data->timeout) == -EAGAIN)
e4eff1a6 4558 return 0;
c40d52fe 4559 if (task->tk_status == 0)
5636ec4e
TM		 4560 update_changeattr(dir, &res->cinfo,
4561 res->dir_attr->time_start, 0);
e4eff1a6 4562 return 1;
1da177e4
LT		 4563}
4564
f2c2c552
TM		 4565static void nfs4_proc_rename_setup(struct rpc_message *msg,
4566 struct dentry *old_dentry,
4567 struct dentry *new_dentry)
d3d4152a 4568{
d3d4152a
JL		 4569 struct nfs_renameargs *arg = msg->rpc_argp;
4570 struct nfs_renameres *res = msg->rpc_resp;
f2c2c552
TM		 4571 struct inode *old_inode = d_inode(old_dentry);
4572 struct inode *new_inode = d_inode(new_dentry);
d3d4152a 4573
f2c2c552 4574 if (old_inode)
c01d3645 4575 nfs4_inode_make_writeable(old_inode);
f2c2c552
TM		 4576 if (new_inode)
4577 nfs4_inode_return_delegation(new_inode);
d3d4152a 4578 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
f2c2c552 4579 res->server = NFS_SB(old_dentry->d_sb);
fba83f34 4580 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1, 0);
d3d4152a
JL		 4581}
4582
c6bfa1a1
BS		 4583static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
4584{
42e1cca7 4585 nfs4_setup_sequence(NFS_SERVER(data->old_dir)->nfs_client,
d9afbd1b
TM		 4586 &data->args.seq_args,
4587 &data->res.seq_res,
4588 task);
d3d4152a
JL		 4589}
4590
4591static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
4592 struct inode *new_dir)
4593{
fbc6f7c2
TM		 4594 struct nfs_renamedata *data = task->tk_calldata;
4595 struct nfs_renameres *res = &data->res;
d3d4152a
JL		 4596
4597 if (!nfs4_sequence_done(task, &res->seq_res))
4598 return 0;
8478eaa1 4599 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
d3d4152a
JL		 4600 return 0;
4601
c733c49c 4602 if (task->tk_status == 0) {
5636ec4e
TM		 4603 if (new_dir != old_dir) {
4604 /* Note: If we moved a directory, nlink will change */
4605 update_changeattr(old_dir, &res->old_cinfo,
4606 res->old_fattr->time_start,
4607 NFS_INO_INVALID_OTHER);
4608 update_changeattr(new_dir, &res->new_cinfo,
4609 res->new_fattr->time_start,
4610 NFS_INO_INVALID_OTHER);
4611 } else
4612 update_changeattr(old_dir, &res->old_cinfo,
4613 res->old_fattr->time_start,
4614 0);
c733c49c 4615 }
d3d4152a
JL		 4616 return 1;
4617}
4618
beffb8fe 4619static int _nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name)
1da177e4 4620{
91ba2eee 4621 struct nfs_server *server = NFS_SERVER(inode);
2f28dc38 4622 __u32 bitmask[NFS4_BITMASK_SZ];
1da177e4
LT		 4623 struct nfs4_link_arg arg = {
4624 .fh = NFS_FH(inode),
4625 .dir_fh = NFS_FH(dir),
4626 .name = name,
2f28dc38 4627 .bitmask = bitmask,
91ba2eee 4628 };
91ba2eee
TM		 4629 struct nfs4_link_res res = {
4630 .server = server,
1775fd3e 4631 .label = NULL,
1da177e4 4632 };
1da177e4
LT		 4633 struct rpc_message msg = {
4634 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
4635 .rpc_argp = &arg,
91ba2eee 4636 .rpc_resp = &res,
1da177e4 4637 };
136f2627
TM		 4638 int status = -ENOMEM;
4639
4640 res.fattr = nfs_alloc_fattr();
778d2817 4641 if (res.fattr == NULL)
136f2627 4642 goto out;
1da177e4 4643
14c43f76
DQ		 4644 res.label = nfs4_label_alloc(server, GFP_KERNEL);
4645 if (IS_ERR(res.label)) {
4646 status = PTR_ERR(res.label);
4647 goto out;
4648 }
4649
c01d3645 4650 nfs4_inode_make_writeable(inode);
2f28dc38 4651 nfs4_bitmap_copy_adjust_setattr(bitmask, nfs4_bitmask(server, res.label), inode);
9f768272 4652
7c513058 4653 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee 4654 if (!status) {
5636ec4e 4655 update_changeattr(dir, &res.cinfo, res.fattr->time_start, 0);
aa9c2669
DQ		 4656 status = nfs_post_op_update_inode(inode, res.fattr);
4657 if (!status)
4658 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 4659 }
14c43f76
DQ		 4660
4661
4662 nfs4_label_free(res.label);
4663
136f2627 4664out:
136f2627 4665 nfs_free_fattr(res.fattr);
1da177e4
LT		 4666 return status;
4667}
4668
beffb8fe 4669static int nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name)
1da177e4 4670{
0688e64b
TM		 4671 struct nfs4_exception exception = {
4672 .interruptible = true,
4673 };
1da177e4
LT		 4674 int err;
4675 do {
4676 err = nfs4_handle_exception(NFS_SERVER(inode),
4677 _nfs4_proc_link(inode, dir, name),
4678 &exception);
4679 } while (exception.retry);
4680 return err;
4681}
4682
57dc9a57
TM		 4683struct nfs4_createdata {
4684 struct rpc_message msg;
4685 struct nfs4_create_arg arg;
4686 struct nfs4_create_res res;
4687 struct nfs_fh fh;
4688 struct nfs_fattr fattr;
1775fd3e 4689 struct nfs4_label *label;
57dc9a57
TM		 4690};
4691
4692static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
beffb8fe 4693 const struct qstr *name, struct iattr *sattr, u32 ftype)
57dc9a57
TM		 4694{
4695 struct nfs4_createdata *data;
4696
4697 data = kzalloc(sizeof(*data), GFP_KERNEL);
4698 if (data != NULL) {
4699 struct nfs_server *server = NFS_SERVER(dir);
4700
14c43f76
DQ		 4701 data->label = nfs4_label_alloc(server, GFP_KERNEL);
4702 if (IS_ERR(data->label))
4703 goto out_free;
4704
57dc9a57
TM		 4705 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
4706 data->msg.rpc_argp = &data->arg;
4707 data->msg.rpc_resp = &data->res;
4708 data->arg.dir_fh = NFS_FH(dir);
4709 data->arg.server = server;
4710 data->arg.name = name;
4711 data->arg.attrs = sattr;
4712 data->arg.ftype = ftype;
aa9c2669 4713 data->arg.bitmask = nfs4_bitmask(server, data->label);
dff25ddb 4714 data->arg.umask = current_umask();
57dc9a57
TM		 4715 data->res.server = server;
4716 data->res.fh = &data->fh;
4717 data->res.fattr = &data->fattr;
1775fd3e 4718 data->res.label = data->label;
57dc9a57 4719 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 4720 }
4721 return data;
14c43f76
DQ		 4722out_free:
4723 kfree(data);
4724 return NULL;
57dc9a57
TM		 4725}
4726
4727static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
4728{
7c513058 4729 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 4730 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57 4731 if (status == 0) {
3c591175
TM		 4732 spin_lock(&dir->i_lock);
4733 update_changeattr_locked(dir, &data->res.dir_cinfo,
5636ec4e 4734 data->res.fattr->time_start, 0);
3c591175
TM		 4735 /* Creating a directory bumps nlink in the parent */
4736 if (data->arg.ftype == NF4DIR)
4737 nfs4_inc_nlink_locked(dir);
4738 spin_unlock(&dir->i_lock);
1775fd3e 4739 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 4740 }
4741 return status;
4742}
4743
4744static void nfs4_free_createdata(struct nfs4_createdata *data)
4745{
14c43f76 4746 nfs4_label_free(data->label);
57dc9a57
TM		 4747 kfree(data);
4748}
4749
4f390c15 4750static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 4751 struct page *page, unsigned int len, struct iattr *sattr,
4752 struct nfs4_label *label)
1da177e4 4753{
57dc9a57
TM		 4754 struct nfs4_createdata *data;
4755 int status = -ENAMETOOLONG;
1da177e4 4756
94a6d753 4757 if (len > NFS4_MAXPATHLEN)
57dc9a57 4758 goto out;
4f390c15 4759
57dc9a57
TM		 4760 status = -ENOMEM;
4761 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
4762 if (data == NULL)
4763 goto out;
4764
4765 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
4766 data->arg.u.symlink.pages = &page;
4767 data->arg.u.symlink.len = len;
1775fd3e 4768 data->arg.label = label;
1da177e4 4769
57dc9a57
TM		 4770 status = nfs4_do_create(dir, dentry, data);
4771
4772 nfs4_free_createdata(data);
4773out:
1da177e4
LT		 4774 return status;
4775}
4776
4f390c15 4777static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 4778 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 4779{
0688e64b
TM		 4780 struct nfs4_exception exception = {
4781 .interruptible = true,
4782 };
aa9c2669 4783 struct nfs4_label l, *label = NULL;
1da177e4 4784 int err;
aa9c2669
DQ		 4785
4786 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4787
1da177e4 4788 do {
078ea3df
TM		 4789 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
4790 trace_nfs4_symlink(dir, &dentry->d_name, err);
4791 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4792 &exception);
4793 } while (exception.retry);
aa9c2669
DQ		 4794
4795 nfs4_label_release_security(label);
1da177e4
LT		 4796 return err;
4797}
4798
4799static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 4800 struct iattr *sattr, struct nfs4_label *label)
1da177e4 4801{
57dc9a57
TM		 4802 struct nfs4_createdata *data;
4803 int status = -ENOMEM;
1da177e4 4804
57dc9a57
TM		 4805 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
4806 if (data == NULL)
4807 goto out;
4808
1775fd3e 4809 data->arg.label = label;
57dc9a57
TM		 4810 status = nfs4_do_create(dir, dentry, data);
4811
4812 nfs4_free_createdata(data);
4813out:
1da177e4
LT		 4814 return status;
4815}
4816
4817static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
4818 struct iattr *sattr)
4819{
dff25ddb 4820 struct nfs_server *server = NFS_SERVER(dir);
0688e64b
TM		 4821 struct nfs4_exception exception = {
4822 .interruptible = true,
4823 };
aa9c2669 4824 struct nfs4_label l, *label = NULL;
1da177e4 4825 int err;
a8a5da99 4826
aa9c2669
DQ		 4827 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4828
dff25ddb
AG		 4829 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
4830 sattr->ia_mode &= ~current_umask();
1da177e4 4831 do {
078ea3df
TM		 4832 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
4833 trace_nfs4_mkdir(dir, &dentry->d_name, err);
4834 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4835 &exception);
4836 } while (exception.retry);
aa9c2669
DQ		 4837 nfs4_label_release_security(label);
4838
1da177e4
LT		 4839 return err;
4840}
4841
684f39b4 4842static int _nfs4_proc_readdir(struct dentry *dentry, const struct cred *cred,
a7a3b1e9 4843 u64 cookie, struct page **pages, unsigned int count, bool plus)
1da177e4 4844{
2b0143b5 4845 struct inode *dir = d_inode(dentry);
1da177e4
LT		 4846 struct nfs4_readdir_arg args = {
4847 .fh = NFS_FH(dir),
56e4ebf8 4848 .pages = pages,
1da177e4
LT		 4849 .pgbase = 0,
4850 .count = count,
2b0143b5 4851 .bitmask = NFS_SERVER(d_inode(dentry))->attr_bitmask,
82f2e547 4852 .plus = plus,
1da177e4
LT		 4853 };
4854 struct nfs4_readdir_res res;
4855 struct rpc_message msg = {
4856 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
4857 .rpc_argp = &args,
4858 .rpc_resp = &res,
4859 .rpc_cred = cred,
4860 };
4861 int status;
4862
6de1472f
AV		 4863 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
4864 dentry,
eadf4598 4865 (unsigned long long)cookie);
c3f52af3 4866 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 4867 res.pgbase = args.pgbase;
7c513058 4868 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 4869 if (status >= 0) {
c3f52af3 4870 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 4871 status += args.pgbase;
4872 }
c4812998
TM		 4873
4874 nfs_invalidate_atime(dir);
4875
3110ff80 4876 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 4877 return status;
4878}
4879
684f39b4 4880static int nfs4_proc_readdir(struct dentry *dentry, const struct cred *cred,
a7a3b1e9 4881 u64 cookie, struct page **pages, unsigned int count, bool plus)
1da177e4 4882{
0688e64b
TM		 4883 struct nfs4_exception exception = {
4884 .interruptible = true,
4885 };
1da177e4
LT		 4886 int err;
4887 do {
c1578b76
TM		 4888 err = _nfs4_proc_readdir(dentry, cred, cookie,
4889 pages, count, plus);
2b0143b5
DH		 4890 trace_nfs4_readdir(d_inode(dentry), err);
4891 err = nfs4_handle_exception(NFS_SERVER(d_inode(dentry)), err,
1da177e4
LT		 4892 &exception);
4893 } while (exception.retry);
4894 return err;
4895}
4896
4897static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 4898 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 4899{
57dc9a57
TM		 4900 struct nfs4_createdata *data;
4901 int mode = sattr->ia_mode;
4902 int status = -ENOMEM;
1da177e4 4903
57dc9a57
TM		 4904 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
4905 if (data == NULL)
4906 goto out;
4907
1da177e4 4908 if (S_ISFIFO(mode))
57dc9a57 4909 data->arg.ftype = NF4FIFO;
1da177e4 4910 else if (S_ISBLK(mode)) {
57dc9a57
TM		 4911 data->arg.ftype = NF4BLK;
4912 data->arg.u.device.specdata1 = MAJOR(rdev);
4913 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 4914 }
4915 else if (S_ISCHR(mode)) {
57dc9a57
TM		 4916 data->arg.ftype = NF4CHR;
4917 data->arg.u.device.specdata1 = MAJOR(rdev);
4918 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 4919 } else if (!S_ISSOCK(mode)) {
4920 status = -EINVAL;
4921 goto out_free;
1da177e4 4922 }
1775fd3e 4923
aa9c2669 4924 data->arg.label = label;
57dc9a57 4925 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 4926out_free:
57dc9a57
TM		 4927 nfs4_free_createdata(data);
4928out:
1da177e4
LT		 4929 return status;
4930}
4931
4932static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
4933 struct iattr *sattr, dev_t rdev)
4934{
dff25ddb 4935 struct nfs_server *server = NFS_SERVER(dir);
0688e64b
TM		 4936 struct nfs4_exception exception = {
4937 .interruptible = true,
4938 };
aa9c2669 4939 struct nfs4_label l, *label = NULL;
1da177e4 4940 int err;
a8a5da99 4941
aa9c2669
DQ		 4942 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4943
dff25ddb
AG		 4944 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
4945 sattr->ia_mode &= ~current_umask();
1da177e4 4946 do {
078ea3df
TM		 4947 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
4948 trace_nfs4_mknod(dir, &dentry->d_name, err);
4949 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4950 &exception);
4951 } while (exception.retry);
aa9c2669
DQ		 4952
4953 nfs4_label_release_security(label);
4954
1da177e4
LT		 4955 return err;
4956}
4957
4958static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
4959 struct nfs_fsstat *fsstat)
4960{
4961 struct nfs4_statfs_arg args = {
4962 .fh = fhandle,
4963 .bitmask = server->attr_bitmask,
4964 };
24ad148a
BH		 4965 struct nfs4_statfs_res res = {
4966 .fsstat = fsstat,
4967 };
1da177e4
LT		 4968 struct rpc_message msg = {
4969 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
4970 .rpc_argp = &args,
24ad148a 4971 .rpc_resp = &res,
1da177e4
LT		 4972 };
4973
0e574af1 4974 nfs_fattr_init(fsstat->fattr);
7c513058 4975 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4976}
4977
4978static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
4979{
0688e64b
TM		 4980 struct nfs4_exception exception = {
4981 .interruptible = true,
4982 };
1da177e4
LT		 4983 int err;
4984 do {
4985 err = nfs4_handle_exception(server,
4986 _nfs4_proc_statfs(server, fhandle, fsstat),
4987 &exception);
4988 } while (exception.retry);
4989 return err;
4990}
4991
4992static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
4993 struct nfs_fsinfo *fsinfo)
4994{
4995 struct nfs4_fsinfo_arg args = {
4996 .fh = fhandle,
4997 .bitmask = server->attr_bitmask,
4998 };
3dda5e43
BH		 4999 struct nfs4_fsinfo_res res = {
5000 .fsinfo = fsinfo,
5001 };
1da177e4
LT		 5002 struct rpc_message msg = {
5003 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
5004 .rpc_argp = &args,
3dda5e43 5005 .rpc_resp = &res,
1da177e4
LT		 5006 };
5007
7c513058 5008 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 5009}
5010
5011static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
5012{
0688e64b
TM		 5013 struct nfs4_exception exception = {
5014 .interruptible = true,
5015 };
83ca7f5a 5016 unsigned long now = jiffies;
1da177e4
LT		 5017 int err;
5018
5019 do {
83ca7f5a 5020 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
b5f875a9 5021 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
83ca7f5a 5022 if (err == 0) {
fb10fb67
TM		 5023 nfs4_set_lease_period(server->nfs_client,
5024 fsinfo->lease_time * HZ,
5025 now);
83ca7f5a
CL		 5026 break;
5027 }
5028 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 5029 } while (exception.retry);
5030 return err;
5031}
5032
5033static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
5034{
e38eb650
BS		 5035 int error;
5036
0e574af1 5037 nfs_fattr_init(fsinfo->fattr);
e38eb650 5038 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 5039 if (error == 0) {
5040 /* block layout checks this! */
5041 server->pnfs_blksize = fsinfo->blksize;
ca440c38 5042 set_pnfs_layoutdriver(server, fhandle, fsinfo);
dc182549 5043 }
e38eb650
BS		 5044
5045 return error;
1da177e4
LT		 5046}
5047
5048static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
5049 struct nfs_pathconf *pathconf)
5050{
5051 struct nfs4_pathconf_arg args = {
5052 .fh = fhandle,
5053 .bitmask = server->attr_bitmask,
5054 };
d45b2989
BH		 5055 struct nfs4_pathconf_res res = {
5056 .pathconf = pathconf,
5057 };
1da177e4
LT		 5058 struct rpc_message msg = {
5059 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
5060 .rpc_argp = &args,
d45b2989 5061 .rpc_resp = &res,
1da177e4
LT		 5062 };
5063
5064 /* None of the pathconf attributes are mandatory to implement */
5065 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
5066 memset(pathconf, 0, sizeof(*pathconf));
5067 return 0;
5068 }
5069
0e574af1 5070 nfs_fattr_init(pathconf->fattr);
7c513058 5071 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 5072}
5073
5074static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
5075 struct nfs_pathconf *pathconf)
5076{
0688e64b
TM		 5077 struct nfs4_exception exception = {
5078 .interruptible = true,
5079 };
1da177e4
LT		 5080 int err;
5081
5082 do {
5083 err = nfs4_handle_exception(server,
5084 _nfs4_proc_pathconf(server, fhandle, pathconf),
5085 &exception);
5086 } while (exception.retry);
5087 return err;
5088}
5089
5521abfd 5090int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 5091 const struct nfs_open_context *ctx,
5092 const struct nfs_lock_context *l_ctx,
5093 fmode_t fmode)
5094{
17393475 5095 return nfs4_select_rw_stateid(ctx->state, fmode, l_ctx, stateid, NULL);
9b206149
TM		 5096}
5097EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
5098
5521abfd
TM		 5099static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
5100 const struct nfs_open_context *ctx,
5101 const struct nfs_lock_context *l_ctx,
5102 fmode_t fmode)
5103{
5104 nfs4_stateid current_stateid;
5105
e1253be0
TM		 5106 /* If the current stateid represents a lost lock, then exit */
5107 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode) == -EIO)
5108 return true;
5521abfd
TM		 5109 return nfs4_stateid_match(stateid, &current_stateid);
5110}
5111
5112static bool nfs4_error_stateid_expired(int err)
5113{
5114 switch (err) {
5115 case -NFS4ERR_DELEG_REVOKED:
5116 case -NFS4ERR_ADMIN_REVOKED:
5117 case -NFS4ERR_BAD_STATEID:
5118 case -NFS4ERR_STALE_STATEID:
5119 case -NFS4ERR_OLD_STATEID:
5120 case -NFS4ERR_OPENMODE:
5121 case -NFS4ERR_EXPIRED:
5122 return true;
5123 }
5124 return false;
5125}
5126
d45f60c6 5127static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
1da177e4 5128{
d45f60c6 5129 struct nfs_server *server = NFS_SERVER(hdr->inode);
1da177e4 5130
d45f60c6 5131 trace_nfs4_read(hdr, task->tk_status);
9c27869d
TM		 5132 if (task->tk_status < 0) {
5133 struct nfs4_exception exception = {
5134 .inode = hdr->inode,
5135 .state = hdr->args.context->state,
5136 .stateid = &hdr->args.stateid,
5137 };
5138 task->tk_status = nfs4_async_handle_exception(task,
5139 server, task->tk_status, &exception);
5140 if (exception.retry) {
5141 rpc_restart_call_prepare(task);
5142 return -EAGAIN;
5143 }
1da177e4 5144 }
8850df99 5145
1da177e4 5146 if (task->tk_status > 0)
d45f60c6 5147 renew_lease(server, hdr->timestamp);
ec06c096 5148 return 0;
1da177e4
LT		 5149}
5150
5521abfd 5151static bool nfs4_read_stateid_changed(struct rpc_task *task,
3c6b899c 5152 struct nfs_pgio_args *args)
5521abfd
TM		 5153{
5154
5155 if (!nfs4_error_stateid_expired(task->tk_status) ||
5156 nfs4_stateid_is_current(&args->stateid,
5157 args->context,
5158 args->lock_context,
5159 FMODE_READ))
5160 return false;
5161 rpc_restart_call_prepare(task);
5162 return true;
5163}
5164
d45f60c6 5165static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
cbdabc7f
AA		 5166{
5167
5168 dprintk("--> %s\n", __func__);
5169
d45f60c6 5170 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
cbdabc7f 5171 return -EAGAIN;
d45f60c6 5172 if (nfs4_read_stateid_changed(task, &hdr->args))
5521abfd 5173 return -EAGAIN;
bfc505de
TM		 5174 if (task->tk_status > 0)
5175 nfs_invalidate_atime(hdr->inode);
d45f60c6
WAA		 5176 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
5177 nfs4_read_done_cb(task, hdr);
cbdabc7f
AA		 5178}
5179
d45f60c6
WAA		 5180static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
5181 struct rpc_message *msg)
1da177e4 5182{
d45f60c6 5183 hdr->timestamp = jiffies;
ca857cc1
TM		 5184 if (!hdr->pgio_done_cb)
5185 hdr->pgio_done_cb = nfs4_read_done_cb;
bdc7f021 5186 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
fba83f34 5187 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0, 0);
1da177e4
LT		 5188}
5189
d45f60c6
WAA		 5190static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
5191 struct nfs_pgio_header *hdr)
ea7c3303 5192{
42e1cca7 5193 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode)->nfs_client,
d45f60c6
WAA		 5194 &hdr->args.seq_args,
5195 &hdr->res.seq_res,
9b206149 5196 task))
ef1820f9 5197 return 0;
d45f60c6
WAA		 5198 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
5199 hdr->args.lock_context,
fbe77c30 5200 hdr->rw_mode) == -EIO)
ef1820f9 5201 return -EIO;
d45f60c6 5202 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
ef1820f9
N		 5203 return -EIO;
5204 return 0;
1da177e4
LT		 5205}
5206
d45f60c6
WAA		 5207static int nfs4_write_done_cb(struct rpc_task *task,
5208 struct nfs_pgio_header *hdr)
1da177e4 5209{
d45f60c6 5210 struct inode *inode = hdr->inode;
8478eaa1 5211
d45f60c6 5212 trace_nfs4_write(hdr, task->tk_status);
9c27869d
TM		 5213 if (task->tk_status < 0) {
5214 struct nfs4_exception exception = {
5215 .inode = hdr->inode,
5216 .state = hdr->args.context->state,
5217 .stateid = &hdr->args.stateid,
5218 };
5219 task->tk_status = nfs4_async_handle_exception(task,
5220 NFS_SERVER(inode), task->tk_status,
5221 &exception);
5222 if (exception.retry) {
5223 rpc_restart_call_prepare(task);
5224 return -EAGAIN;
5225 }
1da177e4 5226 }
4f9838c7 5227 if (task->tk_status >= 0) {
d45f60c6 5228 renew_lease(NFS_SERVER(inode), hdr->timestamp);
a08a8cd3 5229 nfs_writeback_update_inode(hdr);
4f9838c7 5230 }
788e7a89 5231 return 0;
1da177e4
LT		 5232}
5233
5521abfd 5234static bool nfs4_write_stateid_changed(struct rpc_task *task,
3c6b899c 5235 struct nfs_pgio_args *args)
5521abfd
TM		 5236{
5237
5238 if (!nfs4_error_stateid_expired(task->tk_status) ||
5239 nfs4_stateid_is_current(&args->stateid,
5240 args->context,
5241 args->lock_context,
5242 FMODE_WRITE))
5243 return false;
5244 rpc_restart_call_prepare(task);
5245 return true;
5246}
5247
d45f60c6 5248static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
b029bc9b 5249{
d45f60c6 5250 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
b029bc9b 5251 return -EAGAIN;
d45f60c6 5252 if (nfs4_write_stateid_changed(task, &hdr->args))
5521abfd 5253 return -EAGAIN;
d45f60c6
WAA		 5254 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
5255 nfs4_write_done_cb(task, hdr);
b029bc9b
FI		 5256}
5257
5a37f851 5258static
d45f60c6 5259bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
a69aef14 5260{
5a37f851 5261 /* Don't request attributes for pNFS or O_DIRECT writes */
d45f60c6 5262 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
5a37f851
TM		 5263 return false;
5264 /* Otherwise, request attributes if and only if we don't hold
5265 * a delegation
5266 */
011e2a7f 5267 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 5268}
a69aef14 5269
d45f60c6 5270static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
fb91fb0e
AS		 5271 struct rpc_message *msg,
5272 struct rpc_clnt **clnt)
1da177e4 5273{
d45f60c6 5274 struct nfs_server *server = NFS_SERVER(hdr->inode);
bdc7f021 5275
d45f60c6
WAA		 5276 if (!nfs4_write_need_cache_consistency_data(hdr)) {
5277 hdr->args.bitmask = NULL;
5278 hdr->res.fattr = NULL;
7ffd1064 5279 } else
d45f60c6 5280 hdr->args.bitmask = server->cache_consistency_bitmask;
5a37f851 5281
d45f60c6
WAA		 5282 if (!hdr->pgio_done_cb)
5283 hdr->pgio_done_cb = nfs4_write_done_cb;
5284 hdr->res.server = server;
5285 hdr->timestamp = jiffies;
1da177e4 5286
bdc7f021 5287 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
fba83f34 5288 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1, 0);
fb91fb0e 5289 nfs4_state_protect_write(server->nfs_client, clnt, msg, hdr);
1da177e4
LT		 5290}
5291
0b7c0153 5292static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 5293{
42e1cca7 5294 nfs4_setup_sequence(NFS_SERVER(data->inode)->nfs_client,
d9afbd1b
TM		 5295 &data->args.seq_args,
5296 &data->res.seq_res,
5297 task);
1da177e4
LT		 5298}
5299
0b7c0153 5300static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 5301{
1da177e4 5302 struct inode *inode = data->inode;
14516c3a 5303
cc668ab3 5304 trace_nfs4_commit(data, task->tk_status);
8478eaa1
N		 5305 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
5306 NULL, NULL) == -EAGAIN) {
d00c5d43 5307 rpc_restart_call_prepare(task);
788e7a89 5308 return -EAGAIN;
1da177e4 5309 }
788e7a89 5310 return 0;
1da177e4
LT		 5311}
5312
0b7c0153 5313static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 5314{
5315 if (!nfs4_sequence_done(task, &data->res.seq_res))
5316 return -EAGAIN;
0b7c0153 5317 return data->commit_done_cb(task, data);
5f452431
FI		 5318}
5319
e9ae1ee2
AS		 5320static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg,
5321 struct rpc_clnt **clnt)
1da177e4 5322{
788e7a89 5323 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 5324
0b7c0153
FI		 5325 if (data->commit_done_cb == NULL)
5326 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 5327 data->res.server = server;
bdc7f021 5328 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
fba83f34 5329 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 0);
e9ae1ee2 5330 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_COMMIT, clnt, msg);
1da177e4
LT		 5331}
5332
6b8d84e2
OK		 5333static int _nfs4_proc_commit(struct file *dst, struct nfs_commitargs *args,
5334 struct nfs_commitres *res)
5335{
5336 struct inode *dst_inode = file_inode(dst);
5337 struct nfs_server *server = NFS_SERVER(dst_inode);
5338 struct rpc_message msg = {
5339 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT],
5340 .rpc_argp = args,
5341 .rpc_resp = res,
5342 };
5343
5344 args->fh = NFS_FH(dst_inode);
5345 return nfs4_call_sync(server->client, server, &msg,
5346 &args->seq_args, &res->seq_res, 1);
5347}
5348
5349int nfs4_proc_commit(struct file *dst, __u64 offset, __u32 count, struct nfs_commitres *res)
5350{
5351 struct nfs_commitargs args = {
5352 .offset = offset,
5353 .count = count,
5354 };
5355 struct nfs_server *dst_server = NFS_SERVER(file_inode(dst));
5356 struct nfs4_exception exception = { };
5357 int status;
5358
5359 do {
5360 status = _nfs4_proc_commit(dst, &args, res);
5361 status = nfs4_handle_exception(dst_server, status, &exception);
5362 } while (exception.retry);
5363
5364 return status;
5365}
5366
9bc4e3ca
CL		 5367struct nfs4_renewdata {
5368 struct nfs_client *client;
5369 unsigned long timestamp;
5370};
5371
1da177e4
LT		 5372/*
5373 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
5374 * standalone procedure for queueing an asynchronous RENEW.
5375 */
9bc4e3ca 5376static void nfs4_renew_release(void *calldata)
dc96aef9 5377{
9bc4e3ca
CL		 5378 struct nfs4_renewdata *data = calldata;
5379 struct nfs_client *clp = data->client;
dc96aef9 5380
212bf41d 5381 if (refcount_read(&clp->cl_count) > 1)
0851de06
AB		 5382 nfs4_schedule_state_renewal(clp);
5383 nfs_put_client(clp);
9bc4e3ca 5384 kfree(data);
dc96aef9
AB		 5385}
5386
9bc4e3ca 5387static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 5388{
9bc4e3ca
CL		 5389 struct nfs4_renewdata *data = calldata;
5390 struct nfs_client *clp = data->client;
5391 unsigned long timestamp = data->timestamp;
1da177e4 5392
c6d01c6f 5393 trace_nfs4_renew_async(clp, task->tk_status);
f8aba1e8
CL		 5394 switch (task->tk_status) {
5395 case 0:
5396 break;
5397 case -NFS4ERR_LEASE_MOVED:
5398 nfs4_schedule_lease_moved_recovery(clp);
5399 break;
5400 default:
95baa25c 5401 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 5402 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
5403 return;
5404 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 5405 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 5406 return;
5407 }
5408 nfs4_schedule_path_down_recovery(clp);
1da177e4 5409 }
452e9352 5410 do_renew_lease(clp, timestamp);
1da177e4
LT		 5411}
5412
963d8fe5
TM		 5413static const struct rpc_call_ops nfs4_renew_ops = {
5414 .rpc_call_done = nfs4_renew_done,
dc96aef9 5415 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 5416};
5417
a52458b4 5418static int nfs4_proc_async_renew(struct nfs_client *clp, const struct cred *cred, unsigned renew_flags)
1da177e4
LT		 5419{
5420 struct rpc_message msg = {
5421 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
5422 .rpc_argp = clp,
b4454fe1 5423 .rpc_cred = cred,
1da177e4 5424 };
9bc4e3ca 5425 struct nfs4_renewdata *data;
1da177e4 5426
2f60ea6b
TM		 5427 if (renew_flags == 0)
5428 return 0;
212bf41d 5429 if (!refcount_inc_not_zero(&clp->cl_count))
0851de06 5430 return -EIO;
b569ad34 5431 data = kmalloc(sizeof(*data), GFP_NOFS);
5c737cb2
DW		 5432 if (data == NULL) {
5433 nfs_put_client(clp);
9bc4e3ca 5434 return -ENOMEM;
5c737cb2 5435 }
9bc4e3ca
CL		 5436 data->client = clp;
5437 data->timestamp = jiffies;
bc7a05ca 5438 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 5439 &nfs4_renew_ops, data);
1da177e4
LT		 5440}
5441
a52458b4 5442static int nfs4_proc_renew(struct nfs_client *clp, const struct cred *cred)
1da177e4
LT		 5443{
5444 struct rpc_message msg = {
5445 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
5446 .rpc_argp = clp,
b4454fe1 5447 .rpc_cred = cred,
1da177e4
LT		 5448 };
5449 unsigned long now = jiffies;
5450 int status;
5451
bc7a05ca 5452 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 5453 if (status < 0)
5454 return status;
452e9352 5455 do_renew_lease(clp, now);
1da177e4
LT		 5456 return 0;
5457}
5458
aa1870af
BF		 5459static inline int nfs4_server_supports_acls(struct nfs_server *server)
5460{
7dd7d959 5461 return server->caps & NFS_CAP_ACLS;
aa1870af
BF		 5462}
5463
21f498c2
TM		 5464/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
5465 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 5466 * the stack.
5467 */
21f498c2 5468#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 5469
e9e3d724 5470static int buf_to_pages_noslab(const void *buf, size_t buflen,
8fbcf237 5471 struct page **pages)
e9e3d724
NH		 5472{
5473 struct page *newpage, **spages;
5474 int rc = 0;
5475 size_t len;
5476 spages = pages;
5477
5478 do {
21f498c2 5479 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 5480 newpage = alloc_page(GFP_KERNEL);
5481
5482 if (newpage == NULL)
5483 goto unwind;
5484 memcpy(page_address(newpage), buf, len);
d9b67e1e
AS		 5485 buf += len;
5486 buflen -= len;
e9e3d724
NH		 5487 *pages++ = newpage;
5488 rc++;
5489 } while (buflen != 0);
5490
5491 return rc;
5492
5493unwind:
5494 for(; rc > 0; rc--)
5495 __free_page(spages[rc-1]);
5496 return -ENOMEM;
5497}
5498
e50a1c2e
BF		 5499struct nfs4_cached_acl {
5500 int cached;
5501 size_t len;
3e9d4154 5502 char data[0];
e50a1c2e
BF		 5503};
5504
5505static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
5506{
5507 struct nfs_inode *nfsi = NFS_I(inode);
5508
5509 spin_lock(&inode->i_lock);
5510 kfree(nfsi->nfs4_acl);
5511 nfsi->nfs4_acl = acl;
5512 spin_unlock(&inode->i_lock);
5513}
5514
5515static void nfs4_zap_acl_attr(struct inode *inode)
5516{
5517 nfs4_set_cached_acl(inode, NULL);
5518}
5519
5520static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
5521{
5522 struct nfs_inode *nfsi = NFS_I(inode);
5523 struct nfs4_cached_acl *acl;
5524 int ret = -ENOENT;
5525
5526 spin_lock(&inode->i_lock);
5527 acl = nfsi->nfs4_acl;
5528 if (acl == NULL)
5529 goto out;
5530 if (buf == NULL) /* user is just asking for length */
5531 goto out_len;
5532 if (acl->cached == 0)
5533 goto out;
5534 ret = -ERANGE; /* see getxattr(2) man page */
5535 if (acl->len > buflen)
5536 goto out;
5537 memcpy(buf, acl->data, acl->len);
5538out_len:
5539 ret = acl->len;
5540out:
5541 spin_unlock(&inode->i_lock);
5542 return ret;
5543}
5544
5794d21e 5545static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 5546{
5547 struct nfs4_cached_acl *acl;
b291f1b1 5548 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 5549
1f1ea6c2 5550 if (buflen <= PAGE_SIZE) {
b291f1b1 5551 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 5552 if (acl == NULL)
5553 goto out;
5554 acl->cached = 1;
5794d21e 5555 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 5556 } else {
5557 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
5558 if (acl == NULL)
5559 goto out;
5560 acl->cached = 0;
5561 }
5562 acl->len = acl_len;
5563out:
5564 nfs4_set_cached_acl(inode, acl);
5565}
5566
bf118a34
AA		 5567/*
5568 * The getxattr API returns the required buffer length when called with a
5569 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
5570 * the required buf. On a NULL buf, we send a page of data to the server
5571 * guessing that the ACL request can be serviced by a page. If so, we cache
5572 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
5573 * the cache. If not so, we throw away the page, and cache the required
5574 * length. The next getxattr call will then produce another round trip to
5575 * the server, this time with the input buf of the required size.
5576 */
16b4289c 5577static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 5578{
ed92d8c1 5579 struct page *pages[NFS4ACL_MAXPAGES + 1] = {NULL, };
aa1870af
BF		 5580 struct nfs_getaclargs args = {
5581 .fh = NFS_FH(inode),
5582 .acl_pages = pages,
5583 .acl_len = buflen,
5584 };
663c79b3
BH		 5585 struct nfs_getaclres res = {
5586 .acl_len = buflen,
5587 };
aa1870af
BF		 5588 struct rpc_message msg = {
5589 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
5590 .rpc_argp = &args,
663c79b3 5591 .rpc_resp = &res,
aa1870af 5592 };
ed92d8c1 5593 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE) + 1;
21f498c2 5594 int ret = -ENOMEM, i;
aa1870af 5595
21f498c2
TM		 5596 if (npages > ARRAY_SIZE(pages))
5597 return -ERANGE;
5a006899 5598
bf118a34
AA		 5599 for (i = 0; i < npages; i++) {
5600 pages[i] = alloc_page(GFP_KERNEL);
5601 if (!pages[i])
5602 goto out_free;
e50a1c2e 5603 }
5a006899
SP		 5604
5605 /* for decoding across pages */
5606 res.acl_scratch = alloc_page(GFP_KERNEL);
5607 if (!res.acl_scratch)
5608 goto out_free;
5609
bf118a34 5610 args.acl_len = npages * PAGE_SIZE;
5a006899 5611
de040bec 5612 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 5613 __func__, buf, buflen, npages, args.acl_len);
5614 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
5615 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 5616 if (ret)
5617 goto out_free;
bf118a34 5618
1f1ea6c2
TM		 5619 /* Handle the case where the passed-in buffer is too short */
5620 if (res.acl_flags & NFS4_ACL_TRUNC) {
5621 /* Did the user only issue a request for the acl length? */
5622 if (buf == NULL)
5623 goto out_ok;
e50a1c2e 5624 ret = -ERANGE;
1f1ea6c2 5625 goto out_free;
e50a1c2e 5626 }
1f1ea6c2 5627 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 5628 if (buf) {
5629 if (res.acl_len > buflen) {
5630 ret = -ERANGE;
5631 goto out_free;
5632 }
1f1ea6c2 5633 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 5634 }
1f1ea6c2
TM		 5635out_ok:
5636 ret = res.acl_len;
e50a1c2e 5637out_free:
bf118a34
AA		 5638 for (i = 0; i < npages; i++)
5639 if (pages[i])
5640 __free_page(pages[i]);
331818f1
TM		 5641 if (res.acl_scratch)
5642 __free_page(res.acl_scratch);
aa1870af
BF		 5643 return ret;
5644}
5645
16b4289c
TM		 5646static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
5647{
0688e64b
TM		 5648 struct nfs4_exception exception = {
5649 .interruptible = true,
5650 };
16b4289c
TM		 5651 ssize_t ret;
5652 do {
5653 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
c1578b76 5654 trace_nfs4_get_acl(inode, ret);
16b4289c
TM		 5655 if (ret >= 0)
5656 break;
5657 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
5658 } while (exception.retry);
5659 return ret;
5660}
5661
e50a1c2e
BF		 5662static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
5663{
5664 struct nfs_server *server = NFS_SERVER(inode);
5665 int ret;
5666
5667 if (!nfs4_server_supports_acls(server))
5668 return -EOPNOTSUPP;
5669 ret = nfs_revalidate_inode(server, inode);
5670 if (ret < 0)
5671 return ret;
08a22b39
AK		 5672 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
5673 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 5674 ret = nfs4_read_cached_acl(inode, buf, buflen);
5675 if (ret != -ENOENT)
bf118a34
AA		 5676 /* -ENOENT is returned if there is no ACL or if there is an ACL
5677 * but no cached acl data, just the acl length */
e50a1c2e
BF		 5678 return ret;
5679 return nfs4_get_acl_uncached(inode, buf, buflen);
5680}
5681
16b4289c 5682static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 5683{
5684 struct nfs_server *server = NFS_SERVER(inode);
5685 struct page *pages[NFS4ACL_MAXPAGES];
5686 struct nfs_setaclargs arg = {
5687 .fh = NFS_FH(inode),
5688 .acl_pages = pages,
5689 .acl_len = buflen,
5690 };
73c403a9 5691 struct nfs_setaclres res;
4b580ee3
BF		 5692 struct rpc_message msg = {
5693 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
5694 .rpc_argp = &arg,
73c403a9 5695 .rpc_resp = &res,
4b580ee3 5696 };
21f498c2 5697 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 5698 int ret, i;
4b580ee3
BF		 5699
5700 if (!nfs4_server_supports_acls(server))
5701 return -EOPNOTSUPP;
21f498c2
TM		 5702 if (npages > ARRAY_SIZE(pages))
5703 return -ERANGE;
8fbcf237 5704 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages);
e9e3d724
NH		 5705 if (i < 0)
5706 return i;
c01d3645 5707 nfs4_inode_make_writeable(inode);
7c513058 5708 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 5709
5710 /*
5711 * Free each page after tx, so the only ref left is
5712 * held by the network stack
5713 */
5714 for (; i > 0; i--)
5715 put_page(pages[i-1]);
5716
08a22b39
AK		 5717 /*
5718 * Acl update can result in inode attribute update.
5719 * so mark the attribute cache invalid.
5720 */
5721 spin_lock(&inode->i_lock);
16e14375 5722 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_CHANGE
472f761e
TM		 5723 | NFS_INO_INVALID_CTIME
5724 | NFS_INO_REVAL_FORCED;
08a22b39 5725 spin_unlock(&inode->i_lock);
f41f7418
TM		 5726 nfs_access_zap_cache(inode);
5727 nfs_zap_acl_cache(inode);
4b580ee3
BF		 5728 return ret;
5729}
5730
16b4289c
TM		 5731static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
5732{
5733 struct nfs4_exception exception = { };
5734 int err;
5735 do {
c1578b76
TM		 5736 err = __nfs4_proc_set_acl(inode, buf, buflen);
5737 trace_nfs4_set_acl(inode, err);
5738 err = nfs4_handle_exception(NFS_SERVER(inode), err,
16b4289c
TM		 5739 &exception);
5740 } while (exception.retry);
5741 return err;
5742}
5743
aa9c2669
DQ		 5744#ifdef CONFIG_NFS_V4_SECURITY_LABEL
5745static int _nfs4_get_security_label(struct inode *inode, void *buf,
5746 size_t buflen)
5747{
5748 struct nfs_server *server = NFS_SERVER(inode);
5749 struct nfs_fattr fattr;
5750 struct nfs4_label label = {0, 0, buflen, buf};
5751
5752 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
fcb63a9b 5753 struct nfs4_getattr_arg arg = {
aa9c2669
DQ		 5754 .fh = NFS_FH(inode),
5755 .bitmask = bitmask,
5756 };
5757 struct nfs4_getattr_res res = {
5758 .fattr = &fattr,
5759 .label = &label,
5760 .server = server,
5761 };
5762 struct rpc_message msg = {
5763 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
fcb63a9b 5764 .rpc_argp = &arg,
aa9c2669
DQ		 5765 .rpc_resp = &res,
5766 };
5767 int ret;
5768
5769 nfs_fattr_init(&fattr);
5770
fcb63a9b 5771 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
aa9c2669
DQ		 5772 if (ret)
5773 return ret;
5774 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
5775 return -ENOENT;
5776 if (buflen < label.len)
5777 return -ERANGE;
5778 return 0;
5779}
5780
5781static int nfs4_get_security_label(struct inode *inode, void *buf,
5782 size_t buflen)
5783{
0688e64b
TM		 5784 struct nfs4_exception exception = {
5785 .interruptible = true,
5786 };
aa9c2669
DQ		 5787 int err;
5788
5789 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
5790 return -EOPNOTSUPP;
5791
5792 do {
c1578b76
TM		 5793 err = _nfs4_get_security_label(inode, buf, buflen);
5794 trace_nfs4_get_security_label(inode, err);
5795 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 5796 &exception);
5797 } while (exception.retry);
5798 return err;
5799}
5800
5801static int _nfs4_do_set_security_label(struct inode *inode,
5802 struct nfs4_label *ilabel,
5803 struct nfs_fattr *fattr,
5804 struct nfs4_label *olabel)
5805{
5806
5807 struct iattr sattr = {0};
5808 struct nfs_server *server = NFS_SERVER(inode);
5809 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
12207f69 5810 struct nfs_setattrargs arg = {
d9b67e1e
AS		 5811 .fh = NFS_FH(inode),
5812 .iap = &sattr,
aa9c2669
DQ		 5813 .server = server,
5814 .bitmask = bitmask,
5815 .label = ilabel,
5816 };
5817 struct nfs_setattrres res = {
5818 .fattr = fattr,
5819 .label = olabel,
5820 .server = server,
5821 };
5822 struct rpc_message msg = {
d9b67e1e
AS		 5823 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
5824 .rpc_argp = &arg,
5825 .rpc_resp = &res,
aa9c2669
DQ		 5826 };
5827 int status;
5828
12207f69 5829 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
aa9c2669 5830
12207f69 5831 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
aa9c2669
DQ		 5832 if (status)
5833 dprintk("%s failed: %d\n", __func__, status);
5834
5835 return status;
5836}
5837
5838static int nfs4_do_set_security_label(struct inode *inode,
5839 struct nfs4_label *ilabel,
5840 struct nfs_fattr *fattr,
5841 struct nfs4_label *olabel)
5842{
5843 struct nfs4_exception exception = { };
5844 int err;
5845
5846 do {
c1578b76
TM		 5847 err = _nfs4_do_set_security_label(inode, ilabel,
5848 fattr, olabel);
5849 trace_nfs4_set_security_label(inode, err);
5850 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 5851 &exception);
5852 } while (exception.retry);
5853 return err;
5854}
5855
5856static int
59301226 5857nfs4_set_security_label(struct inode *inode, const void *buf, size_t buflen)
aa9c2669
DQ		 5858{
5859 struct nfs4_label ilabel, *olabel = NULL;
5860 struct nfs_fattr fattr;
aa9c2669
DQ		 5861 int status;
5862
5863 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
5864 return -EOPNOTSUPP;
5865
5866 nfs_fattr_init(&fattr);
5867
5868 ilabel.pi = 0;
5869 ilabel.lfs = 0;
5870 ilabel.label = (char *)buf;
5871 ilabel.len = buflen;
5872
aa9c2669
DQ		 5873 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
5874 if (IS_ERR(olabel)) {
5875 status = -PTR_ERR(olabel);
5876 goto out;
5877 }
5878
5879 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
5880 if (status == 0)
5881 nfs_setsecurity(inode, &fattr, olabel);
5882
5883 nfs4_label_free(olabel);
5884out:
aa9c2669
DQ		 5885 return status;
5886}
5887#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
5888
5889
f092075d
CL		 5890static void nfs4_init_boot_verifier(const struct nfs_client *clp,
5891 nfs4_verifier *bootverf)
cd93710e
CL		 5892{
5893 __be32 verf[2];
5894
2c820d9a
CL		 5895 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
5896 /* An impossible timestamp guarantees this value
5897 * will never match a generated boot time. */
2f86e091
DD		 5898 verf[0] = cpu_to_be32(U32_MAX);
5899 verf[1] = cpu_to_be32(U32_MAX);
2c820d9a 5900 } else {
f092075d 5901 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
2f86e091
DD		 5902 u64 ns = ktime_to_ns(nn->boot_time);
5903
5904 verf[0] = cpu_to_be32(ns >> 32);
5905 verf[1] = cpu_to_be32(ns);
2c820d9a 5906 }
cd93710e
CL		 5907 memcpy(bootverf->data, verf, sizeof(bootverf->data));
5908}
5909
a3192688
JL		 5910static int
5911nfs4_init_nonuniform_client_string(struct nfs_client *clp)
e984a55a 5912{
a3192688
JL		 5913 size_t len;
5914 char *str;
e984a55a 5915
ceb3a16c 5916 if (clp->cl_owner_id != NULL)
a3192688 5917 return 0;
4a3e5779 5918
a3192688 5919 rcu_read_lock();
848a4eb2
CL		 5920 len = 14 +
5921 strlen(clp->cl_rpcclient->cl_nodename) +
5922 1 +
a3192688 5923 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) +
a3192688
JL		 5924 1;
5925 rcu_read_unlock();
848a4eb2
CL		 5926 if (nfs4_client_id_uniquifier[0] != '\0')
5927 len += strlen(nfs4_client_id_uniquifier) + 1;
a3192688
JL		 5928 if (len > NFS4_OPAQUE_LIMIT + 1)
5929 return -EINVAL;
5930
5931 /*
5932 * Since this string is allocated at mount time, and held until the
5933 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5934 * about a memory-reclaim deadlock.
5935 */
5936 str = kmalloc(len, GFP_KERNEL);
5937 if (!str)
5938 return -ENOMEM;
ceb3a16c 5939
e984a55a 5940 rcu_read_lock();
848a4eb2 5941 if (nfs4_client_id_uniquifier[0] != '\0')
025bb9f8 5942 scnprintf(str, len, "Linux NFSv4.0 %s/%s/%s",
848a4eb2
CL		 5943 clp->cl_rpcclient->cl_nodename,
5944 nfs4_client_id_uniquifier,
5945 rpc_peeraddr2str(clp->cl_rpcclient,
025bb9f8 5946 RPC_DISPLAY_ADDR));
848a4eb2 5947 else
025bb9f8 5948 scnprintf(str, len, "Linux NFSv4.0 %s/%s",
848a4eb2
CL		 5949 clp->cl_rpcclient->cl_nodename,
5950 rpc_peeraddr2str(clp->cl_rpcclient,
025bb9f8 5951 RPC_DISPLAY_ADDR));
e984a55a 5952 rcu_read_unlock();
a3192688 5953
a3192688
JL		 5954 clp->cl_owner_id = str;
5955 return 0;
e984a55a
CL		 5956}
5957
873e3851
JL		 5958static int
5959nfs4_init_uniquifier_client_string(struct nfs_client *clp)
5960{
873e3851
JL		 5961 size_t len;
5962 char *str;
5963
5964 len = 10 + 10 + 1 + 10 + 1 +
5965 strlen(nfs4_client_id_uniquifier) + 1 +
5966 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5967
5968 if (len > NFS4_OPAQUE_LIMIT + 1)
5969 return -EINVAL;
5970
5971 /*
5972 * Since this string is allocated at mount time, and held until the
5973 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5974 * about a memory-reclaim deadlock.
5975 */
5976 str = kmalloc(len, GFP_KERNEL);
5977 if (!str)
5978 return -ENOMEM;
5979
f2dd436e 5980 scnprintf(str, len, "Linux NFSv%u.%u %s/%s",
873e3851
JL		 5981 clp->rpc_ops->version, clp->cl_minorversion,
5982 nfs4_client_id_uniquifier,
5983 clp->cl_rpcclient->cl_nodename);
873e3851
JL		 5984 clp->cl_owner_id = str;
5985 return 0;
5986}
5987
5988static int
5989nfs4_init_uniform_client_string(struct nfs_client *clp)
e984a55a 5990{
873e3851
JL		 5991 size_t len;
5992 char *str;
ceb3a16c
TM		 5993
5994 if (clp->cl_owner_id != NULL)
873e3851 5995 return 0;
6f2ea7f2
CL		 5996
5997 if (nfs4_client_id_uniquifier[0] != '\0')
873e3851
JL		 5998 return nfs4_init_uniquifier_client_string(clp);
5999
6000 len = 10 + 10 + 1 + 10 + 1 +
6001 strlen(clp->cl_rpcclient->cl_nodename) + 1;
6002
6003 if (len > NFS4_OPAQUE_LIMIT + 1)
6004 return -EINVAL;
6005
6006 /*
6007 * Since this string is allocated at mount time, and held until the
6008 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
6009 * about a memory-reclaim deadlock.
6010 */
6011 str = kmalloc(len, GFP_KERNEL);
6012 if (!str)
6013 return -ENOMEM;
6014
f2dd436e 6015 scnprintf(str, len, "Linux NFSv%u.%u %s",
873e3851
JL		 6016 clp->rpc_ops->version, clp->cl_minorversion,
6017 clp->cl_rpcclient->cl_nodename);
873e3851
JL		 6018 clp->cl_owner_id = str;
6019 return 0;
e984a55a
CL		 6020}
6021
706cb8db
CL		 6022/*
6023 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
6024 * services. Advertise one based on the address family of the
6025 * clientaddr.
6026 */
6027static unsigned int
6028nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
6029{
6030 if (strchr(clp->cl_ipaddr, ':') != NULL)
6031 return scnprintf(buf, len, "tcp6");
6032 else
6033 return scnprintf(buf, len, "tcp");
6034}
6035
f11b2a1c
JL		 6036static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
6037{
6038 struct nfs4_setclientid *sc = calldata;
6039
6040 if (task->tk_status == 0)
6041 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
6042}
6043
6044static const struct rpc_call_ops nfs4_setclientid_ops = {
6045 .rpc_call_done = nfs4_setclientid_done,
6046};
6047
6bbb4ae8
CL		 6048/**
6049 * nfs4_proc_setclientid - Negotiate client ID
6050 * @clp: state data structure
6051 * @program: RPC program for NFSv4 callback service
6052 * @port: IP port number for NFS4 callback service
a52458b4 6053 * @cred: credential to use for this call
6bbb4ae8
CL		 6054 * @res: where to place the result
6055 *
6056 * Returns zero, a negative errno, or a negative NFS4ERR status code.
6057 */
bb8b27e5 6058int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
a52458b4 6059 unsigned short port, const struct cred *cred,
bb8b27e5 6060 struct nfs4_setclientid_res *res)
1da177e4
LT		 6061{
6062 nfs4_verifier sc_verifier;
6063 struct nfs4_setclientid setclientid = {
6064 .sc_verifier = &sc_verifier,
6065 .sc_prog = program,
3a6bb738 6066 .sc_clnt = clp,
1da177e4
LT		 6067 };
6068 struct rpc_message msg = {
6069 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
6070 .rpc_argp = &setclientid,
bb8b27e5 6071 .rpc_resp = res,
286d7d6a 6072 .rpc_cred = cred,
1da177e4 6073 };
f11b2a1c
JL		 6074 struct rpc_task_setup task_setup_data = {
6075 .rpc_client = clp->cl_rpcclient,
6076 .rpc_message = &msg,
6077 .callback_ops = &nfs4_setclientid_ops,
6078 .callback_data = &setclientid,
5a0c257f 6079 .flags = RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN,
f11b2a1c 6080 };
6bbb4ae8 6081 int status;
1da177e4 6082
de734831 6083 /* nfs_client_id4 */
f092075d 6084 nfs4_init_boot_verifier(clp, &sc_verifier);
873e3851
JL		 6085
6086 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
6087 status = nfs4_init_uniform_client_string(clp);
6088 else
a3192688 6089 status = nfs4_init_nonuniform_client_string(clp);
873e3851
JL		 6090
6091 if (status)
6092 goto out;
3a6bb738 6093
de734831 6094 /* cb_client4 */
706cb8db
CL		 6095 setclientid.sc_netid_len =
6096 nfs4_init_callback_netid(clp,
6097 setclientid.sc_netid,
6098 sizeof(setclientid.sc_netid));
de734831 6099 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 6100 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 6101 clp->cl_ipaddr, port >> 8, port & 255);
6102
3a6bb738 6103 dprintk("NFS call setclientid auth=%s, '%s'\n",
6bbb4ae8 6104 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3a6bb738 6105 clp->cl_owner_id);
dae40965
AS		 6106
6107 status = nfs4_call_sync_custom(&task_setup_data);
f11b2a1c
JL		 6108 if (setclientid.sc_cred) {
6109 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
6110 put_rpccred(setclientid.sc_cred);
6111 }
f11b2a1c 6112out:
c6d01c6f 6113 trace_nfs4_setclientid(clp, status);
6bbb4ae8
CL		 6114 dprintk("NFS reply setclientid: %d\n", status);
6115 return status;
1da177e4
LT		 6116}
6117
6bbb4ae8
CL		 6118/**
6119 * nfs4_proc_setclientid_confirm - Confirm client ID
6120 * @clp: state data structure
302fad7b 6121 * @arg: result of a previous SETCLIENTID
a52458b4 6122 * @cred: credential to use for this call
6bbb4ae8
CL		 6123 *
6124 * Returns zero, a negative errno, or a negative NFS4ERR status code.
6125 */
fd954ae1 6126int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5 6127 struct nfs4_setclientid_res *arg,
a52458b4 6128 const struct cred *cred)
1da177e4 6129{
1da177e4
LT		 6130 struct rpc_message msg = {
6131 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 6132 .rpc_argp = arg,
286d7d6a 6133 .rpc_cred = cred,
1da177e4 6134 };
1da177e4
LT		 6135 int status;
6136
6bbb4ae8
CL		 6137 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
6138 clp->cl_rpcclient->cl_auth->au_ops->au_name,
6139 clp->cl_clientid);
5a0c257f
N		 6140 status = rpc_call_sync(clp->cl_rpcclient, &msg,
6141 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN);
c6d01c6f 6142 trace_nfs4_setclientid_confirm(clp, status);
6bbb4ae8 6143 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 6144 return status;
6145}
6146
fe650407
TM		 6147struct nfs4_delegreturndata {
6148 struct nfs4_delegreturnargs args;
fa178f29 6149 struct nfs4_delegreturnres res;
fe650407
TM		 6150 struct nfs_fh fh;
6151 nfs4_stateid stateid;
26e976a8 6152 unsigned long timestamp;
586f1c39
TM		 6153 struct {
6154 struct nfs4_layoutreturn_args arg;
6155 struct nfs4_layoutreturn_res res;
4d796d75 6156 struct nfs4_xdr_opaque_data ld_private;
586f1c39
TM		 6157 u32 roc_barrier;
6158 bool roc;
6159 } lr;
fa178f29 6160 struct nfs_fattr fattr;
fe650407 6161 int rpc_status;
039b756a 6162 struct inode *inode;
fe650407
TM		 6163};
6164
fe650407
TM		 6165static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
6166{
6167 struct nfs4_delegreturndata *data = calldata;
e0dba012
TM		 6168 struct nfs4_exception exception = {
6169 .inode = data->inode,
6170 .stateid = &data->stateid,
6171 };
938e1010 6172
14516c3a
TM		 6173 if (!nfs4_sequence_done(task, &data->res.seq_res))
6174 return;
938e1010 6175
ca8acf8d 6176 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
586f1c39
TM		 6177
6178 /* Handle Layoutreturn errors */
287a9c55
TM		 6179 if (pnfs_roc_done(task, data->inode,
6180 &data->args.lr_args,
6181 &data->res.lr_res,
6182 &data->res.lr_ret) == -EAGAIN)
6183 goto out_restart;
586f1c39 6184
79708861 6185 switch (task->tk_status) {
79708861 6186 case 0:
fa178f29 6187 renew_lease(data->res.server, data->timestamp);
23ea44c2 6188 break;
c97cf606
TM		 6189 case -NFS4ERR_ADMIN_REVOKED:
6190 case -NFS4ERR_DELEG_REVOKED:
26d36301
TM		 6191 case -NFS4ERR_EXPIRED:
6192 nfs4_free_revoked_stateid(data->res.server,
6193 data->args.stateid,
6194 task->tk_msg.rpc_cred);
12f275cd 6195 /* Fallthrough */
c97cf606 6196 case -NFS4ERR_BAD_STATEID:
c97cf606 6197 case -NFS4ERR_STALE_STATEID:
c97cf606
TM		 6198 task->tk_status = 0;
6199 break;
12f275cd 6200 case -NFS4ERR_OLD_STATEID:
140087fd
TM		 6201 if (nfs4_refresh_delegation_stateid(&data->stateid, data->inode))
6202 goto out_restart;
12f275cd
TM		 6203 task->tk_status = 0;
6204 break;
8ac2b422
TM		 6205 case -NFS4ERR_ACCESS:
6206 if (data->args.bitmask) {
6207 data->args.bitmask = NULL;
6208 data->res.fattr = NULL;
140087fd 6209 goto out_restart;
8ac2b422 6210 }
140087fd 6211 /* Fallthrough */
79708861 6212 default:
e0dba012
TM		 6213 task->tk_status = nfs4_async_handle_exception(task,
6214 data->res.server, task->tk_status,
6215 &exception);
6216 if (exception.retry)
140087fd 6217 goto out_restart;
79708861
RL		 6218 }
6219 data->rpc_status = task->tk_status;
140087fd 6220 return;
140087fd
TM		 6221out_restart:
6222 task->tk_status = 0;
6223 rpc_restart_call_prepare(task);
fe650407
TM		 6224}
6225
6226static void nfs4_delegreturn_release(void *calldata)
6227{
039b756a 6228 struct nfs4_delegreturndata *data = calldata;
ea7c38fe 6229 struct inode *inode = data->inode;
039b756a 6230
ea7c38fe 6231 if (inode) {
586f1c39 6232 if (data->lr.roc)
1c5bd76d
TM		 6233 pnfs_roc_release(&data->lr.arg, &data->lr.res,
6234 data->res.lr_ret);
0bc2c9b4 6235 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
ea7c38fe
TM		 6236 nfs_iput_and_deactive(inode);
6237 }
fe650407
TM		 6238 kfree(calldata);
6239}
6240
938e1010
AA		 6241static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
6242{
6243 struct nfs4_delegreturndata *d_data;
c8bf7073 6244 struct pnfs_layout_hdr *lo;
938e1010
AA		 6245
6246 d_data = (struct nfs4_delegreturndata *)data;
6247
1c5bd76d 6248 if (!d_data->lr.roc && nfs4_wait_on_layoutreturn(d_data->inode, task))
500d701f
PT		 6249 return;
6250
c8bf7073
TM		 6251 lo = d_data->args.lr_args ? d_data->args.lr_args->layout : NULL;
6252 if (lo && !pnfs_layout_is_valid(lo)) {
6253 d_data->args.lr_args = NULL;
6254 d_data->res.lr_res = NULL;
6255 }
6256
42e1cca7 6257 nfs4_setup_sequence(d_data->res.server->nfs_client,
d9afbd1b
TM		 6258 &d_data->args.seq_args,
6259 &d_data->res.seq_res,
6260 task);
938e1010 6261}
938e1010 6262
c8d149f3 6263static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010 6264 .rpc_call_prepare = nfs4_delegreturn_prepare,
fe650407
TM		 6265 .rpc_call_done = nfs4_delegreturn_done,
6266 .rpc_release = nfs4_delegreturn_release,
6267};
6268
a52458b4 6269static int _nfs4_proc_delegreturn(struct inode *inode, const struct cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 6270{
6271 struct nfs4_delegreturndata *data;
fa178f29 6272 struct nfs_server *server = NFS_SERVER(inode);
fe650407 6273 struct rpc_task *task;
5138fde0
TM		 6274 struct rpc_message msg = {
6275 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
6276 .rpc_cred = cred,
6277 };
c970aa85
TM		 6278 struct rpc_task_setup task_setup_data = {
6279 .rpc_client = server->client,
5138fde0 6280 .rpc_message = &msg,
c970aa85
TM		 6281 .callback_ops = &nfs4_delegreturn_ops,
6282 .flags = RPC_TASK_ASYNC,
6283 };
e6f81075 6284 int status = 0;
fe650407 6285
8535b2be 6286 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 6287 if (data == NULL)
6288 return -ENOMEM;
fba83f34 6289 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 0);
99ade3c7
AE		 6290
6291 nfs4_state_protect(server->nfs_client,
6292 NFS_SP4_MACH_CRED_CLEANUP,
6293 &task_setup_data.rpc_client, &msg);
6294
fe650407
TM		 6295 data->args.fhandle = &data->fh;
6296 data->args.stateid = &data->stateid;
9e907fec 6297 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 6298 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 6299 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 6300 data->res.fattr = &data->fattr;
6301 data->res.server = server;
586f1c39 6302 data->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
4d796d75 6303 data->lr.arg.ld_private = &data->lr.ld_private;
5138fde0 6304 nfs_fattr_init(data->res.fattr);
26e976a8 6305 data->timestamp = jiffies;
fe650407 6306 data->rpc_status = 0;
53e6fc86 6307 data->lr.roc = pnfs_roc(inode, &data->lr.arg, &data->lr.res, cred);
ea7c38fe 6308 data->inode = nfs_igrab_and_active(inode);
1c5bd76d 6309 if (data->inode) {
1c5bd76d
TM		 6310 if (data->lr.roc) {
6311 data->args.lr_args = &data->lr.arg;
6312 data->res.lr_res = &data->lr.res;
6313 }
53e6fc86
TM		 6314 } else if (data->lr.roc) {
6315 pnfs_roc_release(&data->lr.arg, &data->lr.res, 0);
6316 data->lr.roc = false;
1c5bd76d 6317 }
fe650407 6318
c970aa85 6319 task_setup_data.callback_data = data;
1174dd1f
TM		 6320 msg.rpc_argp = &data->args;
6321 msg.rpc_resp = &data->res;
c970aa85 6322 task = rpc_run_task(&task_setup_data);
7a1218a2 6323 if (IS_ERR(task))
fe650407 6324 return PTR_ERR(task);
e6f81075
TM		 6325 if (!issync)
6326 goto out;
820bf85c 6327 status = rpc_wait_for_completion_task(task);
e6f81075
TM		 6328 if (status != 0)
6329 goto out;
6330 status = data->rpc_status;
e6f81075 6331out:
e6b3c4db 6332 rpc_put_task(task);
fe650407 6333 return status;
1da177e4
LT		 6334}
6335
a52458b4 6336int nfs4_proc_delegreturn(struct inode *inode, const struct cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 6337{
6338 struct nfs_server *server = NFS_SERVER(inode);
6339 struct nfs4_exception exception = { };
6340 int err;
6341 do {
e6f81075 6342 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
48c9579a 6343 trace_nfs4_delegreturn(inode, stateid, err);
1da177e4
LT		 6344 switch (err) {
6345 case -NFS4ERR_STALE_STATEID:
6346 case -NFS4ERR_EXPIRED:
1da177e4
LT		 6347 case 0:
6348 return 0;
6349 }
6350 err = nfs4_handle_exception(server, err, &exception);
6351 } while (exception.retry);
6352 return err;
6353}
6354
1da177e4
LT		 6355static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6356{
6357 struct inode *inode = state->inode;
6358 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 6359 struct nfs_client *clp = server->nfs_client;
911d1aaf 6360 struct nfs_lockt_args arg = {
1da177e4 6361 .fh = NFS_FH(inode),
911d1aaf 6362 .fl = request,
1da177e4 6363 };
911d1aaf
TM		 6364 struct nfs_lockt_res res = {
6365 .denied = request,
1da177e4
LT		 6366 };
6367 struct rpc_message msg = {
6368 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
d9b67e1e
AS		 6369 .rpc_argp = &arg,
6370 .rpc_resp = &res,
1da177e4
LT		 6371 .rpc_cred = state->owner->so_cred,
6372 };
1da177e4
LT		 6373 struct nfs4_lock_state *lsp;
6374 int status;
6375
911d1aaf 6376 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 6377 status = nfs4_set_lock_state(state, request);
6378 if (status != 0)
6379 goto out;
6380 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 6381 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 6382 arg.lock_owner.s_dev = server->s_dev;
7c513058 6383 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 6384 switch (status) {
6385 case 0:
6386 request->fl_type = F_UNLCK;
6387 break;
6388 case -NFS4ERR_DENIED:
6389 status = 0;
1da177e4 6390 }
70cc6487 6391 request->fl_ops->fl_release_private(request);
a6f951dd 6392 request->fl_ops = NULL;
8d0a8a9d 6393out:
1da177e4
LT		 6394 return status;
6395}
6396
6397static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6398{
0688e64b
TM		 6399 struct nfs4_exception exception = {
6400 .interruptible = true,
6401 };
1da177e4
LT		 6402 int err;
6403
6404 do {
d1b748a5
TM		 6405 err = _nfs4_proc_getlk(state, cmd, request);
6406 trace_nfs4_get_lock(request, state, cmd, err);
6407 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
1da177e4
LT		 6408 &exception);
6409 } while (exception.retry);
6410 return err;
6411}
6412
32c6e7ee
TM		 6413/*
6414 * Update the seqid of a lock stateid after receiving
6415 * NFS4ERR_OLD_STATEID
6416 */
6417static bool nfs4_refresh_lock_old_stateid(nfs4_stateid *dst,
6418 struct nfs4_lock_state *lsp)
6419{
6420 struct nfs4_state *state = lsp->ls_state;
6421 bool ret = false;
6422
6423 spin_lock(&state->state_lock);
6424 if (!nfs4_stateid_match_other(dst, &lsp->ls_stateid))
6425 goto out;
6426 if (!nfs4_stateid_is_newer(&lsp->ls_stateid, dst))
6427 nfs4_stateid_seqid_inc(dst);
6428 else
6429 dst->seqid = lsp->ls_stateid.seqid;
6430 ret = true;
6431out:
6432 spin_unlock(&state->state_lock);
6433 return ret;
6434}
6435
6436static bool nfs4_sync_lock_stateid(nfs4_stateid *dst,
6437 struct nfs4_lock_state *lsp)
6438{
6439 struct nfs4_state *state = lsp->ls_state;
6440 bool ret;
6441
6442 spin_lock(&state->state_lock);
6443 ret = !nfs4_stateid_match_other(dst, &lsp->ls_stateid);
6444 nfs4_stateid_copy(dst, &lsp->ls_stateid);
6445 spin_unlock(&state->state_lock);
6446 return ret;
6447}
6448
faf5f49c 6449struct nfs4_unlockdata {
911d1aaf
TM		 6450 struct nfs_locku_args arg;
6451 struct nfs_locku_res res;
faf5f49c
TM		 6452 struct nfs4_lock_state *lsp;
6453 struct nfs_open_context *ctx;
f30cb757 6454 struct nfs_lock_context *l_ctx;
911d1aaf 6455 struct file_lock fl;
516285eb 6456 struct nfs_server *server;
26e976a8 6457 unsigned long timestamp;
faf5f49c
TM		 6458};
6459
911d1aaf
TM		 6460static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
6461 struct nfs_open_context *ctx,
6462 struct nfs4_lock_state *lsp,
6463 struct nfs_seqid *seqid)
6464{
6465 struct nfs4_unlockdata *p;
32c6e7ee
TM		 6466 struct nfs4_state *state = lsp->ls_state;
6467 struct inode *inode = state->inode;
911d1aaf 6468
8535b2be 6469 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 6470 if (p == NULL)
6471 return NULL;
6472 p->arg.fh = NFS_FH(inode);
6473 p->arg.fl = &p->fl;
6474 p->arg.seqid = seqid;
c1d51931 6475 p->res.seqid = seqid;
911d1aaf 6476 p->lsp = lsp;
911d1aaf
TM		 6477 /* Ensure we don't close file until we're done freeing locks! */
6478 p->ctx = get_nfs_open_context(ctx);
f30cb757 6479 p->l_ctx = nfs_get_lock_context(ctx);
7b587e1a
N		 6480 locks_init_lock(&p->fl);
6481 locks_copy_lock(&p->fl, fl);
911d1aaf 6482 p->server = NFS_SERVER(inode);
32c6e7ee
TM		 6483 spin_lock(&state->state_lock);
6484 nfs4_stateid_copy(&p->arg.stateid, &lsp->ls_stateid);
6485 spin_unlock(&state->state_lock);
911d1aaf
TM		 6486 return p;
6487}
6488
06f814a3 6489static void nfs4_locku_release_calldata(void *data)
faf5f49c 6490{
963d8fe5 6491 struct nfs4_unlockdata *calldata = data;
911d1aaf 6492 nfs_free_seqid(calldata->arg.seqid);
06f814a3 6493 nfs4_put_lock_state(calldata->lsp);
f30cb757 6494 nfs_put_lock_context(calldata->l_ctx);
06f814a3
TM		 6495 put_nfs_open_context(calldata->ctx);
6496 kfree(calldata);
faf5f49c
TM		 6497}
6498
963d8fe5 6499static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 6500{
963d8fe5 6501 struct nfs4_unlockdata *calldata = data;
82571552
TM		 6502 struct nfs4_exception exception = {
6503 .inode = calldata->lsp->ls_state->inode,
6504 .stateid = &calldata->arg.stateid,
6505 };
faf5f49c 6506
14516c3a
TM		 6507 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
6508 return;
faf5f49c
TM		 6509 switch (task->tk_status) {
6510 case 0:
26e976a8 6511 renew_lease(calldata->server, calldata->timestamp);
75575ddf 6512 locks_lock_inode_wait(calldata->lsp->ls_state->inode, &calldata->fl);
c69899a1
TM		 6513 if (nfs4_update_lock_stateid(calldata->lsp,
6514 &calldata->res.stateid))
6515 break;
01e03bdc 6516 /* Fall through */
26d36301
TM		 6517 case -NFS4ERR_ADMIN_REVOKED:
6518 case -NFS4ERR_EXPIRED:
6519 nfs4_free_revoked_stateid(calldata->server,
6520 &calldata->arg.stateid,
6521 task->tk_msg.rpc_cred);
01e03bdc 6522 /* Fall through */
9e33bed5 6523 case -NFS4ERR_BAD_STATEID:
faf5f49c 6524 case -NFS4ERR_STALE_STATEID:
32c6e7ee
TM		 6525 if (nfs4_sync_lock_stateid(&calldata->arg.stateid,
6526 calldata->lsp))
6527 rpc_restart_call_prepare(task);
6528 break;
6529 case -NFS4ERR_OLD_STATEID:
6530 if (nfs4_refresh_lock_old_stateid(&calldata->arg.stateid,
6531 calldata->lsp))
425c1d4e 6532 rpc_restart_call_prepare(task);
faf5f49c
TM		 6533 break;
6534 default:
82571552
TM		 6535 task->tk_status = nfs4_async_handle_exception(task,
6536 calldata->server, task->tk_status,
6537 &exception);
6538 if (exception.retry)
d00c5d43 6539 rpc_restart_call_prepare(task);
faf5f49c 6540 }
2b1bc308 6541 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 6542}
6543
4ce70ada 6544static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 6545{
4ce70ada 6546 struct nfs4_unlockdata *calldata = data;
faf5f49c 6547
f30cb757
BC		 6548 if (test_bit(NFS_CONTEXT_UNLOCK, &calldata->l_ctx->open_context->flags) &&
6549 nfs_async_iocounter_wait(task, calldata->l_ctx))
6550 return;
6551
911d1aaf 6552 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 6553 goto out_wait;
795a88c9 6554 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 6555 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 6556 goto out_no_action;
faf5f49c 6557 }
26e976a8 6558 calldata->timestamp = jiffies;
42e1cca7 6559 if (nfs4_setup_sequence(calldata->server->nfs_client,
a893693c 6560 &calldata->arg.seq_args,
2240a9e2
TM		 6561 &calldata->res.seq_res,
6562 task) != 0)
6563 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 6564 return;
6565out_no_action:
6566 task->tk_action = NULL;
6567out_wait:
6568 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 6569}
6570
963d8fe5 6571static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 6572 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 6573 .rpc_call_done = nfs4_locku_done,
06f814a3 6574 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 6575};
6576
a5d16a4d
TM		 6577static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
6578 struct nfs_open_context *ctx,
6579 struct nfs4_lock_state *lsp,
6580 struct nfs_seqid *seqid)
6581{
6582 struct nfs4_unlockdata *data;
5138fde0
TM		 6583 struct rpc_message msg = {
6584 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
6585 .rpc_cred = ctx->cred,
6586 };
c970aa85
TM		 6587 struct rpc_task_setup task_setup_data = {
6588 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 6589 .rpc_message = &msg,
c970aa85 6590 .callback_ops = &nfs4_locku_ops,
101070ca 6591 .workqueue = nfsiod_workqueue,
c970aa85
TM		 6592 .flags = RPC_TASK_ASYNC,
6593 };
a5d16a4d 6594
fa940720
WAA		 6595 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
6596 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
6597
137d6aca
FF		 6598 /* Ensure this is an unlock - when canceling a lock, the
6599 * canceled lock is passed in, and it won't be an unlock.
6600 */
6601 fl->fl_type = F_UNLCK;
f30cb757
BC		 6602 if (fl->fl_flags & FL_CLOSE)
6603 set_bit(NFS_CONTEXT_UNLOCK, &ctx->flags);
137d6aca 6604
a5d16a4d
TM		 6605 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
6606 if (data == NULL) {
6607 nfs_free_seqid(seqid);
6608 return ERR_PTR(-ENOMEM);
6609 }
6610
fba83f34 6611 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1, 0);
1174dd1f
TM		 6612 msg.rpc_argp = &data->arg;
6613 msg.rpc_resp = &data->res;
c970aa85
TM		 6614 task_setup_data.callback_data = data;
6615 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 6616}
6617
faf5f49c
TM		 6618static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
6619{
65b62a29
TM		 6620 struct inode *inode = state->inode;
6621 struct nfs4_state_owner *sp = state->owner;
6622 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 6623 struct nfs_seqid *seqid;
1da177e4 6624 struct nfs4_lock_state *lsp;
06f814a3 6625 struct rpc_task *task;
b4019c0e 6626 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
06f814a3 6627 int status = 0;
536ff0f8 6628 unsigned char fl_flags = request->fl_flags;
faf5f49c 6629
8d0a8a9d 6630 status = nfs4_set_lock_state(state, request);
9b073574
TM		 6631 /* Unlock _before_ we do the RPC call */
6632 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 6633 /* Exclude nfs_delegation_claim_locks() */
6634 mutex_lock(&sp->so_delegreturn_mutex);
6635 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57 6636 down_read(&nfsi->rwsem);
75575ddf 6637 if (locks_lock_inode_wait(inode, request) == -ENOENT) {
19e03c57 6638 up_read(&nfsi->rwsem);
65b62a29 6639 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 6640 goto out;
19e03c57
TM		 6641 }
6642 up_read(&nfsi->rwsem);
65b62a29 6643 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 6644 if (status != 0)
9b073574
TM		 6645 goto out;
6646 /* Is this a delegated lock? */
8d0a8a9d 6647 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 6648 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
6649 goto out;
b4019c0e
TM		 6650 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid;
6651 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 6652 status = -ENOMEM;
badc76dd 6653 if (IS_ERR(seqid))
9b073574 6654 goto out;
cd3758e3 6655 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 6656 status = PTR_ERR(task);
6657 if (IS_ERR(task))
9b073574 6658 goto out;
820bf85c 6659 status = rpc_wait_for_completion_task(task);
e6b3c4db 6660 rpc_put_task(task);
9b073574 6661out:
536ff0f8 6662 request->fl_flags = fl_flags;
d1b748a5 6663 trace_nfs4_unlock(request, state, F_SETLK, status);
1da177e4
LT		 6664 return status;
6665}
6666
a5d16a4d
TM		 6667struct nfs4_lockdata {
6668 struct nfs_lock_args arg;
6669 struct nfs_lock_res res;
6670 struct nfs4_lock_state *lsp;
6671 struct nfs_open_context *ctx;
6672 struct file_lock fl;
26e976a8 6673 unsigned long timestamp;
a5d16a4d
TM		 6674 int rpc_status;
6675 int cancelled;
66179efe 6676 struct nfs_server *server;
a5d16a4d
TM		 6677};
6678
6679static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 6680 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
6681 gfp_t gfp_mask)
1da177e4 6682{
a5d16a4d
TM		 6683 struct nfs4_lockdata *p;
6684 struct inode *inode = lsp->ls_state->inode;
1da177e4 6685 struct nfs_server *server = NFS_SERVER(inode);
b4019c0e 6686 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
a5d16a4d 6687
8535b2be 6688 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 6689 if (p == NULL)
6690 return NULL;
6691
6692 p->arg.fh = NFS_FH(inode);
6693 p->arg.fl = &p->fl;
8535b2be 6694 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
badc76dd 6695 if (IS_ERR(p->arg.open_seqid))
2f74c0a0 6696 goto out_free;
b4019c0e
TM		 6697 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
6698 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask);
badc76dd 6699 if (IS_ERR(p->arg.lock_seqid))
2f74c0a0 6700 goto out_free_seqid;
7539bbab 6701 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 6702 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 6703 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 6704 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 6705 p->lsp = lsp;
66179efe 6706 p->server = server;
a5d16a4d 6707 p->ctx = get_nfs_open_context(ctx);
7b587e1a
N		 6708 locks_init_lock(&p->fl);
6709 locks_copy_lock(&p->fl, fl);
a5d16a4d 6710 return p;
2f74c0a0
TM		 6711out_free_seqid:
6712 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 6713out_free:
6714 kfree(p);
6715 return NULL;
6716}
6717
6718static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
6719{
6720 struct nfs4_lockdata *data = calldata;
6721 struct nfs4_state *state = data->lsp->ls_state;
06735b34 6722
3110ff80 6723 dprintk("%s: begin!\n", __func__);
2f74c0a0 6724 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 6725 goto out_wait;
a5d16a4d 6726 /* Do we need to do an open_to_lock_owner? */
6b447539 6727 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) {
8fe72bac 6728 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 6729 goto out_release_lock_seqid;
8fe72bac 6730 }
425c1d4e
TM		 6731 nfs4_stateid_copy(&data->arg.open_stateid,
6732 &state->open_stateid);
a5d16a4d 6733 data->arg.new_lock_owner = 1;
c1d51931 6734 data->res.open_seqid = data->arg.open_seqid;
425c1d4e 6735 } else {
2f74c0a0 6736 data->arg.new_lock_owner = 0;
425c1d4e
TM		 6737 nfs4_stateid_copy(&data->arg.lock_stateid,
6738 &data->lsp->ls_stateid);
6739 }
5d422301
TM		 6740 if (!nfs4_valid_open_stateid(state)) {
6741 data->rpc_status = -EBADF;
6742 task->tk_action = NULL;
6743 goto out_release_open_seqid;
6744 }
26e976a8 6745 data->timestamp = jiffies;
42e1cca7 6746 if (nfs4_setup_sequence(data->server->nfs_client,
035168ab 6747 &data->arg.seq_args,
2240a9e2 6748 &data->res.seq_res,
d9afbd1b 6749 task) == 0)
66179efe 6750 return;
5d422301 6751out_release_open_seqid:
2240a9e2
TM		 6752 nfs_release_seqid(data->arg.open_seqid);
6753out_release_lock_seqid:
6754 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 6755out_wait:
6756 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 6757 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 6758}
6759
a5d16a4d
TM		 6760static void nfs4_lock_done(struct rpc_task *task, void *calldata)
6761{
6762 struct nfs4_lockdata *data = calldata;
39071e6f 6763 struct nfs4_lock_state *lsp = data->lsp;
a5d16a4d 6764
3110ff80 6765 dprintk("%s: begin!\n", __func__);
a5d16a4d 6766
14516c3a
TM		 6767 if (!nfs4_sequence_done(task, &data->res.seq_res))
6768 return;
66179efe 6769
a5d16a4d 6770 data->rpc_status = task->tk_status;
425c1d4e
TM		 6771 switch (task->tk_status) {
6772 case 0:
2b0143b5 6773 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)),
39071e6f 6774 data->timestamp);
a3cf9bca 6775 if (data->arg.new_lock && !data->cancelled) {
c69899a1 6776 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS);
a3cf9bca 6777 if (locks_lock_inode_wait(lsp->ls_state->inode, &data->fl) < 0)
6ea76bf5 6778 goto out_restart;
c69899a1 6779 }
39071e6f
TM		 6780 if (data->arg.new_lock_owner != 0) {
6781 nfs_confirm_seqid(&lsp->ls_seqid, 0);
6782 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid);
6783 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
6ea76bf5
TM		 6784 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid))
6785 goto out_restart;
425c1d4e
TM		 6786 break;
6787 case -NFS4ERR_BAD_STATEID:
6788 case -NFS4ERR_OLD_STATEID:
6789 case -NFS4ERR_STALE_STATEID:
6790 case -NFS4ERR_EXPIRED:
6791 if (data->arg.new_lock_owner != 0) {
6ea76bf5 6792 if (!nfs4_stateid_match(&data->arg.open_stateid,
425c1d4e 6793 &lsp->ls_state->open_stateid))
6ea76bf5
TM		 6794 goto out_restart;
6795 } else if (!nfs4_stateid_match(&data->arg.lock_stateid,
425c1d4e 6796 &lsp->ls_stateid))
6ea76bf5 6797 goto out_restart;
a5d16a4d 6798 }
a3cf9bca 6799out_done:
3110ff80 6800 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
6ea76bf5
TM		 6801 return;
6802out_restart:
6803 if (!data->cancelled)
6804 rpc_restart_call_prepare(task);
6805 goto out_done;
a5d16a4d
TM		 6806}
6807
6808static void nfs4_lock_release(void *calldata)
6809{
6810 struct nfs4_lockdata *data = calldata;
6811
3110ff80 6812 dprintk("%s: begin!\n", __func__);
2f74c0a0 6813 nfs_free_seqid(data->arg.open_seqid);
6ea76bf5 6814 if (data->cancelled && data->rpc_status == 0) {
a5d16a4d
TM		 6815 struct rpc_task *task;
6816 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
6817 data->arg.lock_seqid);
6818 if (!IS_ERR(task))
bf294b41 6819 rpc_put_task_async(task);
3110ff80 6820 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 6821 } else
6822 nfs_free_seqid(data->arg.lock_seqid);
6823 nfs4_put_lock_state(data->lsp);
6824 put_nfs_open_context(data->ctx);
6825 kfree(data);
3110ff80 6826 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 6827}
6828
6829static const struct rpc_call_ops nfs4_lock_ops = {
6830 .rpc_call_prepare = nfs4_lock_prepare,
6831 .rpc_call_done = nfs4_lock_done,
6832 .rpc_release = nfs4_lock_release,
6833};
6834
2bee72a6
TM		 6835static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
6836{
2bee72a6
TM		 6837 switch (error) {
6838 case -NFS4ERR_ADMIN_REVOKED:
d7f3e4bf 6839 case -NFS4ERR_EXPIRED:
2bee72a6 6840 case -NFS4ERR_BAD_STATEID:
ecac799a 6841 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 6842 if (new_lock_owner != 0 ||
795a88c9 6843 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 6844 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 6845 break;
6846 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 6847 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a 6848 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 6849 };
6850}
6851
afe6c27c 6852static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 6853{
6854 struct nfs4_lockdata *data;
6855 struct rpc_task *task;
5138fde0
TM		 6856 struct rpc_message msg = {
6857 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
6858 .rpc_cred = state->owner->so_cred,
6859 };
c970aa85
TM		 6860 struct rpc_task_setup task_setup_data = {
6861 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 6862 .rpc_message = &msg,
c970aa85 6863 .callback_ops = &nfs4_lock_ops,
101070ca 6864 .workqueue = nfsiod_workqueue,
c970aa85
TM		 6865 .flags = RPC_TASK_ASYNC,
6866 };
a5d16a4d
TM		 6867 int ret;
6868
3110ff80 6869 dprintk("%s: begin!\n", __func__);
cd3758e3 6870 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 6871 fl->fl_u.nfs4_fl.owner,
6872 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 6873 if (data == NULL)
6874 return -ENOMEM;
6875 if (IS_SETLKW(cmd))
6876 data->arg.block = 1;
fba83f34
AS		 6877 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1,
6878 recovery_type > NFS_LOCK_NEW);
1174dd1f
TM		 6879 msg.rpc_argp = &data->arg;
6880 msg.rpc_resp = &data->res;
c970aa85 6881 task_setup_data.callback_data = data;
8fe72bac
TM		 6882 if (recovery_type > NFS_LOCK_NEW) {
6883 if (recovery_type == NFS_LOCK_RECLAIM)
6884 data->arg.reclaim = NFS_LOCK_RECLAIM;
c69899a1
TM		 6885 } else
6886 data->arg.new_lock = 1;
c970aa85 6887 task = rpc_run_task(&task_setup_data);
7a1218a2 6888 if (IS_ERR(task))
a5d16a4d 6889 return PTR_ERR(task);
820bf85c 6890 ret = rpc_wait_for_completion_task(task);
a5d16a4d
TM		 6891 if (ret == 0) {
6892 ret = data->rpc_status;
2bee72a6
TM		 6893 if (ret)
6894 nfs4_handle_setlk_error(data->server, data->lsp,
6895 data->arg.new_lock_owner, ret);
a5d16a4d 6896 } else
a7a3b1e9 6897 data->cancelled = true;
e6b3c4db 6898 rpc_put_task(task);
3110ff80 6899 dprintk("%s: done, ret = %d!\n", __func__, ret);
48c9579a 6900 trace_nfs4_set_lock(fl, state, &data->res.stateid, cmd, ret);
a5d16a4d 6901 return ret;
1da177e4
LT		 6902}
6903
6904static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
6905{
202b50dc 6906 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 6907 struct nfs4_exception exception = {
6908 .inode = state->inode,
6909 };
202b50dc
TM		 6910 int err;
6911
6912 do {
42a2d13e
TM		 6913 /* Cache the lock if possible... */
6914 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
6915 return 0;
afe6c27c 6916 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 6917 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 6918 break;
6919 nfs4_handle_exception(server, err, &exception);
6920 } while (exception.retry);
6921 return err;
1da177e4
LT		 6922}
6923
6924static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
6925{
202b50dc 6926 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 6927 struct nfs4_exception exception = {
6928 .inode = state->inode,
6929 };
202b50dc
TM		 6930 int err;
6931
6bfc93ef
TM		 6932 err = nfs4_set_lock_state(state, request);
6933 if (err != 0)
6934 return err;
f6de7a39 6935 if (!recover_lost_locks) {
ef1820f9
N		 6936 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
6937 return 0;
6938 }
202b50dc 6939 do {
42a2d13e
TM		 6940 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
6941 return 0;
afe6c27c 6942 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 6943 switch (err) {
6944 default:
6945 goto out;
6946 case -NFS4ERR_GRACE:
6947 case -NFS4ERR_DELAY:
6948 nfs4_handle_exception(server, err, &exception);
6949 err = 0;
6950 }
202b50dc 6951 } while (exception.retry);
a9ed2e25 6952out:
202b50dc 6953 return err;
1da177e4
LT		 6954}
6955
f062eb6c 6956#if defined(CONFIG_NFS_V4_1)
b01dd1d8
BS		 6957static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
6958{
c5896fc8
TM		 6959 struct nfs4_lock_state *lsp;
6960 int status;
b01dd1d8 6961
c5896fc8
TM		 6962 status = nfs4_set_lock_state(state, request);
6963 if (status != 0)
6964 return status;
6965 lsp = request->fl_u.nfs4_fl.owner;
6966 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) ||
6967 test_bit(NFS_LOCK_LOST, &lsp->ls_flags))
6968 return 0;
81b68de4 6969 return nfs4_lock_expired(state, request);
f062eb6c
BS		 6970}
6971#endif
6972
1da177e4
LT		 6973static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6974{
19e03c57 6975 struct nfs_inode *nfsi = NFS_I(state->inode);
11476e9d 6976 struct nfs4_state_owner *sp = state->owner;
01c3b861 6977 unsigned char fl_flags = request->fl_flags;
1ea67dbd 6978 int status;
1da177e4 6979
01c3b861 6980 request->fl_flags |= FL_ACCESS;
75575ddf 6981 status = locks_lock_inode_wait(state->inode, request);
01c3b861
TM		 6982 if (status < 0)
6983 goto out;
11476e9d 6984 mutex_lock(&sp->so_delegreturn_mutex);
19e03c57 6985 down_read(&nfsi->rwsem);
01c3b861 6986 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 6987 /* Yes: cache locks! */
01c3b861 6988 /* ...but avoid races with delegation recall... */
19e03c57 6989 request->fl_flags = fl_flags & ~FL_SLEEP;
75575ddf 6990 status = locks_lock_inode_wait(state->inode, request);
c69899a1 6991 up_read(&nfsi->rwsem);
11476e9d 6992 mutex_unlock(&sp->so_delegreturn_mutex);
9a99af49 6993 goto out;
9a99af49 6994 }
19e03c57 6995 up_read(&nfsi->rwsem);
11476e9d 6996 mutex_unlock(&sp->so_delegreturn_mutex);
c69899a1 6997 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
01c3b861
TM		 6998out:
6999 request->fl_flags = fl_flags;
1da177e4
LT		 7000 return status;
7001}
7002
7003static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
7004{
a1d0b5ee
TM		 7005 struct nfs4_exception exception = {
7006 .state = state,
05ffe24f 7007 .inode = state->inode,
0688e64b 7008 .interruptible = true,
a1d0b5ee 7009 };
1da177e4
LT		 7010 int err;
7011
7012 do {
965b5d67
TM		 7013 err = _nfs4_proc_setlk(state, cmd, request);
7014 if (err == -NFS4ERR_DENIED)
7015 err = -EAGAIN;
1da177e4 7016 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 7017 err, &exception);
1da177e4
LT		 7018 } while (exception.retry);
7019 return err;
7020}
7021
d2f3a7f9
JL		 7022#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
7023#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
7024
7025static int
a1d617d8
JL		 7026nfs4_retry_setlk_simple(struct nfs4_state *state, int cmd,
7027 struct file_lock *request)
d2f3a7f9
JL		 7028{
7029 int status = -ERESTARTSYS;
7030 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
7031
7032 while(!signalled()) {
7033 status = nfs4_proc_setlk(state, cmd, request);
7034 if ((status != -EAGAIN) || IS_SETLK(cmd))
7035 break;
7036 freezable_schedule_timeout_interruptible(timeout);
7037 timeout *= 2;
7038 timeout = min_t(unsigned long, NFS4_LOCK_MAXTIMEOUT, timeout);
7039 status = -ERESTARTSYS;
7040 }
7041 return status;
7042}
7043
a1d617d8
JL		 7044#ifdef CONFIG_NFS_V4_1
7045struct nfs4_lock_waiter {
7046 struct task_struct *task;
7047 struct inode *inode;
7048 struct nfs_lowner *owner;
a1d617d8
JL		 7049};
7050
7051static int
ac6424b9 7052nfs4_wake_lock_waiter(wait_queue_entry_t *wait, unsigned int mode, int flags, void *key)
a1d617d8
JL		 7053{
7054 int ret;
a1d617d8 7055 struct nfs4_lock_waiter *waiter = wait->private;
a1d617d8 7056
57174593
JL		 7057 /* NULL key means to wake up everyone */
7058 if (key) {
7059 struct cb_notify_lock_args *cbnl = key;
7060 struct nfs_lowner *lowner = &cbnl->cbnl_owner,
7061 *wowner = waiter->owner;
a1d617d8 7062
57174593
JL		 7063 /* Only wake if the callback was for the same owner. */
7064 if (lowner->id != wowner->id || lowner->s_dev != wowner->s_dev)
7065 return 0;
a1d617d8 7066
57174593
JL		 7067 /* Make sure it's for the right inode */
7068 if (nfs_compare_fh(NFS_FH(waiter->inode), &cbnl->cbnl_fh))
7069 return 0;
57174593 7070 }
a1d617d8
JL		 7071
7072 /* override "private" so we can use default_wake_function */
7073 wait->private = waiter->task;
52b042ab
YW		 7074 ret = woken_wake_function(wait, mode, flags, key);
7075 if (ret)
7076 list_del_init(&wait->entry);
a1d617d8
JL		 7077 wait->private = waiter;
7078 return ret;
7079}
7080
7081static int
7082nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
7083{
7084 int status = -ERESTARTSYS;
a1d617d8
JL		 7085 struct nfs4_lock_state *lsp = request->fl_u.nfs4_fl.owner;
7086 struct nfs_server *server = NFS_SERVER(state->inode);
7087 struct nfs_client *clp = server->nfs_client;
7088 wait_queue_head_t *q = &clp->cl_lock_waitq;
7089 struct nfs_lowner owner = { .clientid = clp->cl_clientid,
7090 .id = lsp->ls_seqid.owner_id,
7091 .s_dev = server->s_dev };
7092 struct nfs4_lock_waiter waiter = { .task = current,
7093 .inode = state->inode,
52b042ab 7094 .owner = &owner};
ac6424b9 7095 wait_queue_entry_t wait;
a1d617d8
JL		 7096
7097 /* Don't bother with waitqueue if we don't expect a callback */
7098 if (!test_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags))
7099 return nfs4_retry_setlk_simple(state, cmd, request);
7100
7101 init_wait(&wait);
7102 wait.private = &waiter;
7103 wait.func = nfs4_wake_lock_waiter;
a1d617d8
JL		 7104
7105 while(!signalled()) {
ba851a39 7106 add_wait_queue(q, &wait);
a1d617d8 7107 status = nfs4_proc_setlk(state, cmd, request);
ba851a39
YW		 7108 if ((status != -EAGAIN) || IS_SETLK(cmd)) {
7109 finish_wait(q, &wait);
a1d617d8 7110 break;
ba851a39 7111 }
a1d617d8
JL		 7112
7113 status = -ERESTARTSYS;
52b042ab
YW		 7114 freezer_do_not_count();
7115 wait_woken(&wait, TASK_INTERRUPTIBLE, NFS4_LOCK_MAXTIMEOUT);
7116 freezer_count();
ba851a39 7117 finish_wait(q, &wait);
a1d617d8
JL		 7118 }
7119
a1d617d8
JL		 7120 return status;
7121}
7122#else /* !CONFIG_NFS_V4_1 */
7123static inline int
7124nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
7125{
7126 return nfs4_retry_setlk_simple(state, cmd, request);
7127}
7128#endif
7129
1da177e4
LT		 7130static int
7131nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
7132{
7133 struct nfs_open_context *ctx;
7134 struct nfs4_state *state;
1da177e4
LT		 7135 int status;
7136
7137 /* verify open state */
cd3758e3 7138 ctx = nfs_file_open_context(filp);
1da177e4
LT		 7139 state = ctx->state;
7140
d953126a
TM		 7141 if (IS_GETLK(cmd)) {
7142 if (state != NULL)
7143 return nfs4_proc_getlk(state, F_GETLK, request);
7144 return 0;
7145 }
1da177e4
LT		 7146
7147 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
7148 return -EINVAL;
7149
d953126a
TM		 7150 if (request->fl_type == F_UNLCK) {
7151 if (state != NULL)
7152 return nfs4_proc_unlck(state, cmd, request);
7153 return 0;
7154 }
1da177e4 7155
d953126a
TM		 7156 if (state == NULL)
7157 return -ENOLCK;
1ea67dbd
JL		 7158
7159 if ((request->fl_flags & FL_POSIX) &&
7160 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
7161 return -ENOLCK;
7162
fcfa4470
BC		 7163 /*
7164 * Don't rely on the VFS having checked the file open mode,
7165 * since it won't do this for flock() locks.
7166 */
7167 switch (request->fl_type) {
7168 case F_RDLCK:
7169 if (!(filp->f_mode & FMODE_READ))
7170 return -EBADF;
7171 break;
7172 case F_WRLCK:
7173 if (!(filp->f_mode & FMODE_WRITE))
7174 return -EBADF;
7175 }
7176
1ea67dbd
JL		 7177 status = nfs4_set_lock_state(state, request);
7178 if (status != 0)
7179 return status;
7180
d2f3a7f9 7181 return nfs4_retry_setlk(state, cmd, request);
1da177e4
LT		 7182}
7183
db4f2e63 7184int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 7185{
7186 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 7187 int err;
7188
7189 err = nfs4_set_lock_state(state, fl);
7190 if (err != 0)
db4f2e63 7191 return err;
4a706fa0 7192 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
dce2630c 7193 return nfs4_handle_delegation_recall_error(server, state, stateid, fl, err);
888e694c 7194}
6b3b5496 7195
cf470c3e
TM		 7196struct nfs_release_lockowner_data {
7197 struct nfs4_lock_state *lsp;
5ae67c4f 7198 struct nfs_server *server;
cf470c3e 7199 struct nfs_release_lockowner_args args;
b7e63a10 7200 struct nfs_release_lockowner_res res;
60ea6812 7201 unsigned long timestamp;
cf470c3e
TM		 7202};
7203
fbd4bfd1
CL		 7204static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
7205{
7206 struct nfs_release_lockowner_data *data = calldata;
5b53dc88 7207 struct nfs_server *server = data->server;
7981c8a6
AS		 7208 nfs4_setup_sequence(server->nfs_client, &data->args.seq_args,
7209 &data->res.seq_res, task);
5b53dc88 7210 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
60ea6812 7211 data->timestamp = jiffies;
fbd4bfd1
CL		 7212}
7213
7214static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
7215{
7216 struct nfs_release_lockowner_data *data = calldata;
60ea6812
CL		 7217 struct nfs_server *server = data->server;
7218
b7e63a10 7219 nfs40_sequence_done(task, &data->res.seq_res);
60ea6812
CL		 7220
7221 switch (task->tk_status) {
7222 case 0:
7223 renew_lease(server, data->timestamp);
7224 break;
7225 case -NFS4ERR_STALE_CLIENTID:
7226 case -NFS4ERR_EXPIRED:
5b53dc88
KM		 7227 nfs4_schedule_lease_recovery(server->nfs_client);
7228 break;
60ea6812
CL		 7229 case -NFS4ERR_LEASE_MOVED:
7230 case -NFS4ERR_DELAY:
8478eaa1
N		 7231 if (nfs4_async_handle_error(task, server,
7232 NULL, NULL) == -EAGAIN)
60ea6812
CL		 7233 rpc_restart_call_prepare(task);
7234 }
fbd4bfd1
CL		 7235}
7236
d3c7b7cc
TM		 7237static void nfs4_release_lockowner_release(void *calldata)
7238{
cf470c3e 7239 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 7240 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 7241 kfree(calldata);
7242}
7243
17280175 7244static const struct rpc_call_ops nfs4_release_lockowner_ops = {
fbd4bfd1
CL		 7245 .rpc_call_prepare = nfs4_release_lockowner_prepare,
7246 .rpc_call_done = nfs4_release_lockowner_done,
d3c7b7cc
TM		 7247 .rpc_release = nfs4_release_lockowner_release,
7248};
7249
f1cdae87
JL		 7250static void
7251nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 7252{
cf470c3e 7253 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 7254 struct rpc_message msg = {
7255 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
7256 };
7257
7258 if (server->nfs_client->cl_mvops->minor_version != 0)
f1cdae87 7259 return;
fbd4bfd1 7260
cf470c3e
TM		 7261 data = kmalloc(sizeof(*data), GFP_NOFS);
7262 if (!data)
f1cdae87 7263 return;
cf470c3e 7264 data->lsp = lsp;
5ae67c4f 7265 data->server = server;
cf470c3e
TM		 7266 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
7267 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
7268 data->args.lock_owner.s_dev = server->s_dev;
fbd4bfd1 7269
cf470c3e 7270 msg.rpc_argp = &data->args;
b7e63a10 7271 msg.rpc_resp = &data->res;
fba83f34 7272 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0, 0);
cf470c3e 7273 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
d3c7b7cc
TM		 7274}
7275
aa1870af
BF		 7276#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
7277
d9a82a04 7278static int nfs4_xattr_set_nfs4_acl(const struct xattr_handler *handler,
59301226
AV		 7279 struct dentry *unused, struct inode *inode,
7280 const char *key, const void *buf,
7281 size_t buflen, int flags)
6b3b5496 7282{
59301226 7283 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 7284}
7285
d9a82a04 7286static int nfs4_xattr_get_nfs4_acl(const struct xattr_handler *handler,
b296821a
AV		 7287 struct dentry *unused, struct inode *inode,
7288 const char *key, void *buf, size_t buflen)
6b3b5496 7289{
b296821a 7290 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 7291}
7292
764a5c6b 7293static bool nfs4_xattr_list_nfs4_acl(struct dentry *dentry)
6b3b5496 7294{
764a5c6b 7295 return nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry)));
6b3b5496
BF		 7296}
7297
c9bccef6 7298#ifdef CONFIG_NFS_V4_SECURITY_LABEL
c9bccef6 7299
d9a82a04 7300static int nfs4_xattr_set_nfs4_label(const struct xattr_handler *handler,
59301226
AV		 7301 struct dentry *unused, struct inode *inode,
7302 const char *key, const void *buf,
7303 size_t buflen, int flags)
c9bccef6
DQ		 7304{
7305 if (security_ismaclabel(key))
59301226 7306 return nfs4_set_security_label(inode, buf, buflen);
c9bccef6
DQ		 7307
7308 return -EOPNOTSUPP;
7309}
7310
d9a82a04 7311static int nfs4_xattr_get_nfs4_label(const struct xattr_handler *handler,
b296821a
AV		 7312 struct dentry *unused, struct inode *inode,
7313 const char *key, void *buf, size_t buflen)
c9bccef6
DQ		 7314{
7315 if (security_ismaclabel(key))
b296821a 7316 return nfs4_get_security_label(inode, buf, buflen);
c9bccef6
DQ		 7317 return -EOPNOTSUPP;
7318}
7319
c4803c49
AG		 7320static ssize_t
7321nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
c9bccef6 7322{
c4803c49 7323 int len = 0;
c9bccef6 7324
c4803c49
AG		 7325 if (nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) {
7326 len = security_inode_listsecurity(inode, list, list_len);
7327 if (list_len && len > list_len)
7328 return -ERANGE;
c9bccef6
DQ		 7329 }
7330 return len;
7331}
7332
7333static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
7334 .prefix = XATTR_SECURITY_PREFIX,
c9bccef6
DQ		 7335 .get = nfs4_xattr_get_nfs4_label,
7336 .set = nfs4_xattr_set_nfs4_label,
7337};
c9bccef6 7338
c4803c49
AG		 7339#else
7340
7341static ssize_t
7342nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
7343{
7344 return 0;
7345}
7346
7347#endif
c9bccef6 7348
533eb461
AA		 7349/*
7350 * nfs_fhget will use either the mounted_on_fileid or the fileid
7351 */
69aaaae1
TM		 7352static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
7353{
533eb461
AA		 7354 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
7355 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
7356 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 7357 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 7358 return;
7359
7360 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 7361 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 7362 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
7363 fattr->nlink = 2;
7364}
7365
f05d147f
BS		 7366static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
7367 const struct qstr *name,
7368 struct nfs4_fs_locations *fs_locations,
7369 struct page *page)
683b57b4
TM		 7370{
7371 struct nfs_server *server = NFS_SERVER(dir);
c05cefcc 7372 u32 bitmask[3];
683b57b4
TM		 7373 struct nfs4_fs_locations_arg args = {
7374 .dir_fh = NFS_FH(dir),
c228fd3a 7375 .name = name,
683b57b4
TM		 7376 .page = page,
7377 .bitmask = bitmask,
7378 };
22958463
BH		 7379 struct nfs4_fs_locations_res res = {
7380 .fs_locations = fs_locations,
7381 };
683b57b4
TM		 7382 struct rpc_message msg = {
7383 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
7384 .rpc_argp = &args,
22958463 7385 .rpc_resp = &res,
683b57b4
TM		 7386 };
7387 int status;
7388
3110ff80 7389 dprintk("%s: start\n", __func__);
533eb461 7390
c05cefcc
CL		 7391 bitmask[0] = nfs4_fattr_bitmap[0] | FATTR4_WORD0_FS_LOCATIONS;
7392 bitmask[1] = nfs4_fattr_bitmap[1];
7393
533eb461
AA		 7394 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
7395 * is not supported */
7396 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
c05cefcc 7397 bitmask[0] &= ~FATTR4_WORD0_FILEID;
533eb461 7398 else
c05cefcc 7399 bitmask[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
533eb461 7400
c228fd3a 7401 nfs_fattr_init(&fs_locations->fattr);
683b57b4 7402 fs_locations->server = server;
830b8e33 7403 fs_locations->nlocations = 0;
f05d147f 7404 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 7405 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 7406 return status;
7407}
7408
f05d147f
BS		 7409int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
7410 const struct qstr *name,
7411 struct nfs4_fs_locations *fs_locations,
7412 struct page *page)
db0a9593 7413{
0688e64b
TM		 7414 struct nfs4_exception exception = {
7415 .interruptible = true,
7416 };
db0a9593
BS		 7417 int err;
7418 do {
078ea3df
TM		 7419 err = _nfs4_proc_fs_locations(client, dir, name,
7420 fs_locations, page);
7421 trace_nfs4_get_fs_locations(dir, name, err);
7422 err = nfs4_handle_exception(NFS_SERVER(dir), err,
db0a9593
BS		 7423 &exception);
7424 } while (exception.retry);
7425 return err;
7426}
7427
b03d735b
CL		 7428/*
7429 * This operation also signals the server that this client is
7430 * performing migration recovery. The server can stop returning
7431 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
7432 * appended to this compound to identify the client ID which is
7433 * performing recovery.
7434 */
7435static int _nfs40_proc_get_locations(struct inode *inode,
7436 struct nfs4_fs_locations *locations,
a52458b4 7437 struct page *page, const struct cred *cred)
b03d735b
CL		 7438{
7439 struct nfs_server *server = NFS_SERVER(inode);
7440 struct rpc_clnt *clnt = server->client;
7441 u32 bitmask[2] = {
7442 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
7443 };
7444 struct nfs4_fs_locations_arg args = {
7445 .clientid = server->nfs_client->cl_clientid,
7446 .fh = NFS_FH(inode),
7447 .page = page,
7448 .bitmask = bitmask,
7449 .migration = 1, /* skip LOOKUP */
7450 .renew = 1, /* append RENEW */
7451 };
7452 struct nfs4_fs_locations_res res = {
7453 .fs_locations = locations,
7454 .migration = 1,
7455 .renew = 1,
7456 };
7457 struct rpc_message msg = {
7458 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
7459 .rpc_argp = &args,
7460 .rpc_resp = &res,
7461 .rpc_cred = cred,
7462 };
7463 unsigned long now = jiffies;
7464 int status;
7465
7466 nfs_fattr_init(&locations->fattr);
7467 locations->server = server;
7468 locations->nlocations = 0;
7469
fba83f34 7470 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1);
b03d735b
CL		 7471 status = nfs4_call_sync_sequence(clnt, server, &msg,
7472 &args.seq_args, &res.seq_res);
7473 if (status)
7474 return status;
7475
7476 renew_lease(server, now);
7477 return 0;
7478}
7479
7480#ifdef CONFIG_NFS_V4_1
7481
7482/*
7483 * This operation also signals the server that this client is
7484 * performing migration recovery. The server can stop asserting
7485 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
7486 * performing this operation is identified in the SEQUENCE
7487 * operation in this compound.
7488 *
7489 * When the client supports GETATTR(fs_locations_info), it can
7490 * be plumbed in here.
7491 */
7492static int _nfs41_proc_get_locations(struct inode *inode,
7493 struct nfs4_fs_locations *locations,
a52458b4 7494 struct page *page, const struct cred *cred)
b03d735b
CL		 7495{
7496 struct nfs_server *server = NFS_SERVER(inode);
7497 struct rpc_clnt *clnt = server->client;
7498 u32 bitmask[2] = {
7499 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
7500 };
7501 struct nfs4_fs_locations_arg args = {
7502 .fh = NFS_FH(inode),
7503 .page = page,
7504 .bitmask = bitmask,
7505 .migration = 1, /* skip LOOKUP */
7506 };
7507 struct nfs4_fs_locations_res res = {
7508 .fs_locations = locations,
7509 .migration = 1,
7510 };
7511 struct rpc_message msg = {
7512 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
7513 .rpc_argp = &args,
7514 .rpc_resp = &res,
7515 .rpc_cred = cred,
7516 };
7517 int status;
7518
7519 nfs_fattr_init(&locations->fattr);
7520 locations->server = server;
7521 locations->nlocations = 0;
7522
fba83f34 7523 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1);
b03d735b
CL		 7524 status = nfs4_call_sync_sequence(clnt, server, &msg,
7525 &args.seq_args, &res.seq_res);
7526 if (status == NFS4_OK &&
7527 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
7528 status = -NFS4ERR_LEASE_MOVED;
7529 return status;
7530}
7531
7532#endif /* CONFIG_NFS_V4_1 */
7533
7534/**
7535 * nfs4_proc_get_locations - discover locations for a migrated FSID
7536 * @inode: inode on FSID that is migrating
7537 * @locations: result of query
7538 * @page: buffer
7539 * @cred: credential to use for this operation
7540 *
7541 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
7542 * operation failed, or a negative errno if a local error occurred.
7543 *
7544 * On success, "locations" is filled in, but if the server has
7545 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
7546 * asserted.
7547 *
7548 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
7549 * from this client that require migration recovery.
7550 */
7551int nfs4_proc_get_locations(struct inode *inode,
7552 struct nfs4_fs_locations *locations,
a52458b4 7553 struct page *page, const struct cred *cred)
b03d735b
CL		 7554{
7555 struct nfs_server *server = NFS_SERVER(inode);
7556 struct nfs_client *clp = server->nfs_client;
7557 const struct nfs4_mig_recovery_ops *ops =
7558 clp->cl_mvops->mig_recovery_ops;
0688e64b
TM		 7559 struct nfs4_exception exception = {
7560 .interruptible = true,
7561 };
b03d735b
CL		 7562 int status;
7563
7564 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
7565 (unsigned long long)server->fsid.major,
7566 (unsigned long long)server->fsid.minor,
7567 clp->cl_hostname);
7568 nfs_display_fhandle(NFS_FH(inode), __func__);
7569
7570 do {
7571 status = ops->get_locations(inode, locations, page, cred);
7572 if (status != -NFS4ERR_DELAY)
7573 break;
7574 nfs4_handle_exception(server, status, &exception);
7575 } while (exception.retry);
7576 return status;
7577}
7578
44c99933
CL		 7579/*
7580 * This operation also signals the server that this client is
7581 * performing "lease moved" recovery. The server can stop
7582 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
7583 * is appended to this compound to identify the client ID which is
7584 * performing recovery.
7585 */
a52458b4 7586static int _nfs40_proc_fsid_present(struct inode *inode, const struct cred *cred)
44c99933
CL		 7587{
7588 struct nfs_server *server = NFS_SERVER(inode);
7589 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
7590 struct rpc_clnt *clnt = server->client;
7591 struct nfs4_fsid_present_arg args = {
7592 .fh = NFS_FH(inode),
7593 .clientid = clp->cl_clientid,
7594 .renew = 1, /* append RENEW */
7595 };
7596 struct nfs4_fsid_present_res res = {
7597 .renew = 1,
7598 };
7599 struct rpc_message msg = {
7600 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
7601 .rpc_argp = &args,
7602 .rpc_resp = &res,
7603 .rpc_cred = cred,
7604 };
7605 unsigned long now = jiffies;
7606 int status;
7607
7608 res.fh = nfs_alloc_fhandle();
7609 if (res.fh == NULL)
7610 return -ENOMEM;
7611
fba83f34 7612 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1);
44c99933
CL		 7613 status = nfs4_call_sync_sequence(clnt, server, &msg,
7614 &args.seq_args, &res.seq_res);
7615 nfs_free_fhandle(res.fh);
7616 if (status)
7617 return status;
7618
7619 do_renew_lease(clp, now);
7620 return 0;
7621}
7622
7623#ifdef CONFIG_NFS_V4_1
7624
7625/*
7626 * This operation also signals the server that this client is
7627 * performing "lease moved" recovery. The server can stop asserting
7628 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
7629 * this operation is identified in the SEQUENCE operation in this
7630 * compound.
7631 */
a52458b4 7632static int _nfs41_proc_fsid_present(struct inode *inode, const struct cred *cred)
44c99933
CL		 7633{
7634 struct nfs_server *server = NFS_SERVER(inode);
7635 struct rpc_clnt *clnt = server->client;
7636 struct nfs4_fsid_present_arg args = {
7637 .fh = NFS_FH(inode),
7638 };
7639 struct nfs4_fsid_present_res res = {
7640 };
7641 struct rpc_message msg = {
7642 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
7643 .rpc_argp = &args,
7644 .rpc_resp = &res,
7645 .rpc_cred = cred,
7646 };
7647 int status;
7648
7649 res.fh = nfs_alloc_fhandle();
7650 if (res.fh == NULL)
7651 return -ENOMEM;
7652
fba83f34 7653 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1);
44c99933
CL		 7654 status = nfs4_call_sync_sequence(clnt, server, &msg,
7655 &args.seq_args, &res.seq_res);
7656 nfs_free_fhandle(res.fh);
7657 if (status == NFS4_OK &&
7658 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
7659 status = -NFS4ERR_LEASE_MOVED;
7660 return status;
7661}
7662
7663#endif /* CONFIG_NFS_V4_1 */
7664
7665/**
7666 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
7667 * @inode: inode on FSID to check
7668 * @cred: credential to use for this operation
7669 *
7670 * Server indicates whether the FSID is present, moved, or not
7671 * recognized. This operation is necessary to clear a LEASE_MOVED
7672 * condition for this client ID.
7673 *
7674 * Returns NFS4_OK if the FSID is present on this server,
7675 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
7676 * NFS4ERR code if some error occurred on the server, or a
7677 * negative errno if a local failure occurred.
7678 */
a52458b4 7679int nfs4_proc_fsid_present(struct inode *inode, const struct cred *cred)
44c99933
CL		 7680{
7681 struct nfs_server *server = NFS_SERVER(inode);
7682 struct nfs_client *clp = server->nfs_client;
7683 const struct nfs4_mig_recovery_ops *ops =
7684 clp->cl_mvops->mig_recovery_ops;
0688e64b
TM		 7685 struct nfs4_exception exception = {
7686 .interruptible = true,
7687 };
44c99933
CL		 7688 int status;
7689
7690 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
7691 (unsigned long long)server->fsid.major,
7692 (unsigned long long)server->fsid.minor,
7693 clp->cl_hostname);
7694 nfs_display_fhandle(NFS_FH(inode), __func__);
7695
7696 do {
7697 status = ops->fsid_present(inode, cred);
7698 if (status != -NFS4ERR_DELAY)
7699 break;
7700 nfs4_handle_exception(server, status, &exception);
7701 } while (exception.retry);
7702 return status;
7703}
7704
302fad7b 7705/*
a5250def
WAA		 7706 * If 'use_integrity' is true and the state managment nfs_client
7707 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
7708 * and the machine credential as per RFC3530bis and RFC5661 Security
7709 * Considerations sections. Otherwise, just use the user cred with the
7710 * filesystem's rpc_client.
5ec16a85 7711 */
a5250def 7712static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
5a5ea0d4
BS		 7713{
7714 int status;
50493364
AS		 7715 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
7716 struct nfs_client *clp = NFS_SERVER(dir)->nfs_client;
5a5ea0d4
BS		 7717 struct nfs4_secinfo_arg args = {
7718 .dir_fh = NFS_FH(dir),
7719 .name = name,
7720 };
7721 struct nfs4_secinfo_res res = {
7722 .flavors = flavors,
7723 };
7724 struct rpc_message msg = {
7725 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
7726 .rpc_argp = &args,
7727 .rpc_resp = &res,
7728 };
50493364
AS		 7729 struct nfs4_call_sync_data data = {
7730 .seq_server = NFS_SERVER(dir),
7731 .seq_args = &args.seq_args,
7732 .seq_res = &res.seq_res,
7733 };
7734 struct rpc_task_setup task_setup = {
7735 .rpc_client = clnt,
7736 .rpc_message = &msg,
7737 .callback_ops = clp->cl_mvops->call_sync_ops,
7738 .callback_data = &data,
7739 .flags = RPC_TASK_NO_ROUND_ROBIN,
7740 };
a52458b4 7741 const struct cred *cred = NULL;
a5250def
WAA		 7742
7743 if (use_integrity) {
50493364
AS		 7744 clnt = clp->cl_rpcclient;
7745 task_setup.rpc_client = clnt;
7746
7747 cred = nfs4_get_clid_cred(clp);
7cb852df 7748 msg.rpc_cred = cred;
a5250def 7749 }
5a5ea0d4
BS		 7750
7751 dprintk("NFS call secinfo %s\n", name->name);
8b5bee2e 7752
50493364
AS		 7753 nfs4_state_protect(clp, NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
7754 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0);
7755 status = nfs4_call_sync_custom(&task_setup);
8b5bee2e 7756
5a5ea0d4 7757 dprintk("NFS reply secinfo: %d\n", status);
a5250def 7758
a52458b4 7759 put_cred(cred);
5a5ea0d4
BS		 7760 return status;
7761}
7762
72de53ec
BS		 7763int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
7764 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4 7765{
0688e64b
TM		 7766 struct nfs4_exception exception = {
7767 .interruptible = true,
7768 };
5a5ea0d4
BS		 7769 int err;
7770 do {
a5250def
WAA		 7771 err = -NFS4ERR_WRONGSEC;
7772
7773 /* try to use integrity protection with machine cred */
7774 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
7775 err = _nfs4_proc_secinfo(dir, name, flavors, true);
7776
7777 /*
7778 * if unable to use integrity protection, or SECINFO with
7779 * integrity protection returns NFS4ERR_WRONGSEC (which is
7780 * disallowed by spec, but exists in deployed servers) use
7781 * the current filesystem's rpc_client and the user cred.
7782 */
7783 if (err == -NFS4ERR_WRONGSEC)
7784 err = _nfs4_proc_secinfo(dir, name, flavors, false);
7785
078ea3df
TM		 7786 trace_nfs4_secinfo(dir, name, err);
7787 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5a5ea0d4
BS		 7788 &exception);
7789 } while (exception.retry);
7790 return err;
7791}
7792
557134a3 7793#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 7794/*
7795 * Check the exchange flags returned by the server for invalid flags, having
7796 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
7797 * DS flags set.
7798 */
7799static int nfs4_check_cl_exchange_flags(u32 flags)
7800{
7801 if (flags & ~EXCHGID4_FLAG_MASK_R)
7802 goto out_inval;
7803 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
7804 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
7805 goto out_inval;
7806 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
7807 goto out_inval;
7808 return NFS_OK;
7809out_inval:
7810 return -NFS4ERR_INVAL;
7811}
7812
78fe0f41 7813static bool
79d4e1f0
CL		 7814nfs41_same_server_scope(struct nfs41_server_scope *a,
7815 struct nfs41_server_scope *b)
78fe0f41 7816{
49ad0145
AS		 7817 if (a->server_scope_sz != b->server_scope_sz)
7818 return false;
7819 return memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0;
78fe0f41
WAA		 7820}
7821
02a95dee
AA		 7822static void
7823nfs4_bind_one_conn_to_session_done(struct rpc_task *task, void *calldata)
7824{
7825}
7826
7827static const struct rpc_call_ops nfs4_bind_one_conn_to_session_ops = {
7828 .rpc_call_done = &nfs4_bind_one_conn_to_session_done,
7829};
7830
7c44f1ae 7831/*
d9ddbf5d 7832 * nfs4_proc_bind_one_conn_to_session()
7c44f1ae
WAA		 7833 *
7834 * The 4.1 client currently uses the same TCP connection for the
7835 * fore and backchannel.
7836 */
d9ddbf5d
TM		 7837static
7838int nfs4_proc_bind_one_conn_to_session(struct rpc_clnt *clnt,
7839 struct rpc_xprt *xprt,
7840 struct nfs_client *clp,
a52458b4 7841 const struct cred *cred)
7c44f1ae
WAA		 7842{
7843 int status;
71a097c6
TM		 7844 struct nfs41_bind_conn_to_session_args args = {
7845 .client = clp,
7846 .dir = NFS4_CDFC4_FORE_OR_BOTH,
7847 };
7c44f1ae
WAA		 7848 struct nfs41_bind_conn_to_session_res res;
7849 struct rpc_message msg = {
7850 .rpc_proc =
7851 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
71a097c6 7852 .rpc_argp = &args,
7c44f1ae 7853 .rpc_resp = &res,
2cf047c9 7854 .rpc_cred = cred,
7c44f1ae 7855 };
d9ddbf5d
TM		 7856 struct rpc_task_setup task_setup_data = {
7857 .rpc_client = clnt,
7858 .rpc_xprt = xprt,
02a95dee 7859 .callback_ops = &nfs4_bind_one_conn_to_session_ops,
d9ddbf5d
TM		 7860 .rpc_message = &msg,
7861 .flags = RPC_TASK_TIMEOUT,
7862 };
7863 struct rpc_task *task;
7c44f1ae 7864
71a097c6
TM		 7865 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id);
7866 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN))
7867 args.dir = NFS4_CDFC4_FORE;
7c44f1ae 7868
d9ddbf5d
TM		 7869 /* Do not set the backchannel flag unless this is clnt->cl_xprt */
7870 if (xprt != rcu_access_pointer(clnt->cl_xprt))
7871 args.dir = NFS4_CDFC4_FORE;
7872
7873 task = rpc_run_task(&task_setup_data);
7874 if (!IS_ERR(task)) {
7875 status = task->tk_status;
7876 rpc_put_task(task);
7877 } else
7878 status = PTR_ERR(task);
c6d01c6f 7879 trace_nfs4_bind_conn_to_session(clp, status);
7c44f1ae 7880 if (status == 0) {
71a097c6 7881 if (memcmp(res.sessionid.data,
7c44f1ae
WAA		 7882 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
7883 dprintk("NFS: %s: Session ID mismatch\n", __func__);
c7ae7639 7884 return -EIO;
7c44f1ae 7885 }
71a097c6 7886 if ((res.dir & args.dir) != res.dir || res.dir == 0) {
7c44f1ae
WAA		 7887 dprintk("NFS: %s: Unexpected direction from server\n",
7888 __func__);
c7ae7639 7889 return -EIO;
7c44f1ae 7890 }
71a097c6 7891 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) {
7c44f1ae
WAA		 7892 dprintk("NFS: %s: Server returned RDMA mode = true\n",
7893 __func__);
c7ae7639 7894 return -EIO;
7c44f1ae
WAA		 7895 }
7896 }
c7ae7639 7897
7c44f1ae
WAA		 7898 return status;
7899}
7900
d9ddbf5d
TM		 7901struct rpc_bind_conn_calldata {
7902 struct nfs_client *clp;
a52458b4 7903 const struct cred *cred;
d9ddbf5d
TM		 7904};
7905
7906static int
7907nfs4_proc_bind_conn_to_session_callback(struct rpc_clnt *clnt,
7908 struct rpc_xprt *xprt,
7909 void *calldata)
7910{
7911 struct rpc_bind_conn_calldata *p = calldata;
7912
7913 return nfs4_proc_bind_one_conn_to_session(clnt, xprt, p->clp, p->cred);
7914}
7915
a52458b4 7916int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, const struct cred *cred)
d9ddbf5d
TM		 7917{
7918 struct rpc_bind_conn_calldata data = {
7919 .clp = clp,
7920 .cred = cred,
7921 };
7922 return rpc_clnt_iterate_for_each_xprt(clp->cl_rpcclient,
7923 nfs4_proc_bind_conn_to_session_callback, &data);
7924}
7925
99fe60d0 7926/*
fa940720
WAA		 7927 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
7928 * and operations we'd like to see to enable certain features in the allow map
2031cd1a
WAA		 7929 */
7930static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
7931 .how = SP4_MACH_CRED,
7932 .enforce.u.words = {
7933 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
7934 1 << (OP_EXCHANGE_ID - 32) |
7935 1 << (OP_CREATE_SESSION - 32) |
7936 1 << (OP_DESTROY_SESSION - 32) |
7937 1 << (OP_DESTROY_CLIENTID - 32)
fa940720
WAA		 7938 },
7939 .allow.u.words = {
7940 [0] = 1 << (OP_CLOSE) |
99ade3c7 7941 1 << (OP_OPEN_DOWNGRADE) |
a0279625 7942 1 << (OP_LOCKU) |
99ade3c7 7943 1 << (OP_DELEGRETURN) |
a0279625 7944 1 << (OP_COMMIT),
8b5bee2e 7945 [1] = 1 << (OP_SECINFO - 32) |
3787d506 7946 1 << (OP_SECINFO_NO_NAME - 32) |
99ade3c7 7947 1 << (OP_LAYOUTRETURN - 32) |
3787d506 7948 1 << (OP_TEST_STATEID - 32) |
a0279625
WAA		 7949 1 << (OP_FREE_STATEID - 32) |
7950 1 << (OP_WRITE - 32)
2031cd1a
WAA		 7951 }
7952};
7953
7954/*
7955 * Select the state protection mode for client `clp' given the server results
7956 * from exchange_id in `sp'.
99fe60d0 7957 *
2031cd1a
WAA		 7958 * Returns 0 on success, negative errno otherwise.
7959 */
7960static int nfs4_sp4_select_mode(struct nfs_client *clp,
7961 struct nfs41_state_protection *sp)
7962{
7963 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
7964 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
7965 1 << (OP_EXCHANGE_ID - 32) |
7966 1 << (OP_CREATE_SESSION - 32) |
7967 1 << (OP_DESTROY_SESSION - 32) |
7968 1 << (OP_DESTROY_CLIENTID - 32)
7969 };
937e3133 7970 unsigned long flags = 0;
2031cd1a 7971 unsigned int i;
937e3133 7972 int ret = 0;
2031cd1a
WAA		 7973
7974 if (sp->how == SP4_MACH_CRED) {
7975 /* Print state protect result */
7976 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
7977 for (i = 0; i <= LAST_NFS4_OP; i++) {
7978 if (test_bit(i, sp->enforce.u.longs))
7979 dfprintk(MOUNT, " enforce op %d\n", i);
7980 if (test_bit(i, sp->allow.u.longs))
7981 dfprintk(MOUNT, " allow op %d\n", i);
7982 }
7983
7984 /* make sure nothing is on enforce list that isn't supported */
7985 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
7986 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
7987 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
937e3133
TM		 7988 ret = -EINVAL;
7989 goto out;
2031cd1a
WAA		 7990 }
7991 }
7992
7993 /*
7994 * Minimal mode - state operations are allowed to use machine
7995 * credential. Note this already happens by default, so the
7996 * client doesn't have to do anything more than the negotiation.
7997 *
7998 * NOTE: we don't care if EXCHANGE_ID is in the list -
7999 * we're already using the machine cred for exchange_id
8000 * and will never use a different cred.
8001 */
8002 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
8003 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
8004 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
8005 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
8006 dfprintk(MOUNT, "sp4_mach_cred:\n");
8007 dfprintk(MOUNT, " minimal mode enabled\n");
937e3133 8008 __set_bit(NFS_SP4_MACH_CRED_MINIMAL, &flags);
2031cd1a
WAA		 8009 } else {
8010 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
937e3133
TM		 8011 ret = -EINVAL;
8012 goto out;
2031cd1a 8013 }
fa940720
WAA		 8014
8015 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
99ade3c7
AE		 8016 test_bit(OP_OPEN_DOWNGRADE, sp->allow.u.longs) &&
8017 test_bit(OP_DELEGRETURN, sp->allow.u.longs) &&
fa940720
WAA		 8018 test_bit(OP_LOCKU, sp->allow.u.longs)) {
8019 dfprintk(MOUNT, " cleanup mode enabled\n");
937e3133 8020 __set_bit(NFS_SP4_MACH_CRED_CLEANUP, &flags);
fa940720 8021 }
8b5bee2e 8022
99ade3c7
AE		 8023 if (test_bit(OP_LAYOUTRETURN, sp->allow.u.longs)) {
8024 dfprintk(MOUNT, " pnfs cleanup mode enabled\n");
937e3133 8025 __set_bit(NFS_SP4_MACH_CRED_PNFS_CLEANUP, &flags);
99ade3c7
AE		 8026 }
8027
8b5bee2e
WAA		 8028 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
8029 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
8030 dfprintk(MOUNT, " secinfo mode enabled\n");
937e3133 8031 __set_bit(NFS_SP4_MACH_CRED_SECINFO, &flags);
8b5bee2e 8032 }
3787d506
WAA		 8033
8034 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
8035 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
8036 dfprintk(MOUNT, " stateid mode enabled\n");
937e3133 8037 __set_bit(NFS_SP4_MACH_CRED_STATEID, &flags);
3787d506 8038 }
8c21c62c
WAA		 8039
8040 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
8041 dfprintk(MOUNT, " write mode enabled\n");
937e3133 8042 __set_bit(NFS_SP4_MACH_CRED_WRITE, &flags);
8c21c62c
WAA		 8043 }
8044
8045 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
8046 dfprintk(MOUNT, " commit mode enabled\n");
937e3133 8047 __set_bit(NFS_SP4_MACH_CRED_COMMIT, &flags);
8c21c62c 8048 }
2031cd1a 8049 }
937e3133
TM		 8050out:
8051 clp->cl_sp4_flags = flags;
72bf75cf 8052 return ret;
2031cd1a
WAA		 8053}
8054
8d89bd70
AA		 8055struct nfs41_exchange_id_data {
8056 struct nfs41_exchange_id_res res;
8057 struct nfs41_exchange_id_args args;
8d89bd70
AA		 8058};
8059
8d89bd70
AA		 8060static void nfs4_exchange_id_release(void *data)
8061{
8062 struct nfs41_exchange_id_data *cdata =
8063 (struct nfs41_exchange_id_data *)data;
8064
63513232 8065 nfs_put_client(cdata->args.client);
8d89bd70
AA		 8066 kfree(cdata->res.impl_id);
8067 kfree(cdata->res.server_scope);
8068 kfree(cdata->res.server_owner);
8069 kfree(cdata);
8070}
8071
8072static const struct rpc_call_ops nfs4_exchange_id_call_ops = {
8d89bd70
AA		 8073 .rpc_release = nfs4_exchange_id_release,
8074};
8075
2031cd1a
WAA		 8076/*
8077 * _nfs4_proc_exchange_id()
6bbb4ae8 8078 *
2031cd1a 8079 * Wrapper for EXCHANGE_ID operation.
99fe60d0 8080 */
9c760d1f 8081static struct rpc_task *
a52458b4 8082nfs4_run_exchange_id(struct nfs_client *clp, const struct cred *cred,
ad0849a7 8083 u32 sp4_how, struct rpc_xprt *xprt)
99fe60d0 8084{
99fe60d0
BH		 8085 struct rpc_message msg = {
8086 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
99fe60d0
BH		 8087 .rpc_cred = cred,
8088 };
8d89bd70
AA		 8089 struct rpc_task_setup task_setup_data = {
8090 .rpc_client = clp->cl_rpcclient,
8091 .callback_ops = &nfs4_exchange_id_call_ops,
8092 .rpc_message = &msg,
5a0c257f 8093 .flags = RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN,
8d89bd70
AA		 8094 };
8095 struct nfs41_exchange_id_data *calldata;
e917f0d1 8096 int status;
8d89bd70 8097
212bf41d 8098 if (!refcount_inc_not_zero(&clp->cl_count))
9c760d1f 8099 return ERR_PTR(-EIO);
8d89bd70 8100
9c760d1f 8101 status = -ENOMEM;
8d89bd70 8102 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
9c760d1f
TM		 8103 if (!calldata)
8104 goto out;
99fe60d0 8105
fd40559c 8106 nfs4_init_boot_verifier(clp, &calldata->args.verifier);
873e3851
JL		 8107
8108 status = nfs4_init_uniform_client_string(clp);
8109 if (status)
8d89bd70 8110 goto out_calldata;
3a6bb738 8111
8d89bd70
AA		 8112 calldata->res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
8113 GFP_NOFS);
8114 status = -ENOMEM;
8115 if (unlikely(calldata->res.server_owner == NULL))
8116 goto out_calldata;
78fe0f41 8117
8d89bd70 8118 calldata->res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 8119 GFP_NOFS);
8d89bd70 8120 if (unlikely(calldata->res.server_scope == NULL))
acdeb69d 8121 goto out_server_owner;
78fe0f41 8122
8d89bd70
AA		 8123 calldata->res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
8124 if (unlikely(calldata->res.impl_id == NULL))
7d2ed9ac 8125 goto out_server_scope;
7d2ed9ac 8126
2031cd1a
WAA		 8127 switch (sp4_how) {
8128 case SP4_NONE:
8d89bd70 8129 calldata->args.state_protect.how = SP4_NONE;
2031cd1a
WAA		 8130 break;
8131
8132 case SP4_MACH_CRED:
8d89bd70 8133 calldata->args.state_protect = nfs4_sp4_mach_cred_request;
2031cd1a
WAA		 8134 break;
8135
8136 default:
8137 /* unsupported! */
8138 WARN_ON_ONCE(1);
8139 status = -EINVAL;
6b55970b 8140 goto out_impl_id;
2031cd1a 8141 }
ad0849a7 8142 if (xprt) {
ad0849a7 8143 task_setup_data.rpc_xprt = xprt;
d9cb7330 8144 task_setup_data.flags |= RPC_TASK_SOFTCONN;
fd40559c
TM		 8145 memcpy(calldata->args.verifier.data, clp->cl_confirm.data,
8146 sizeof(calldata->args.verifier.data));
ad0849a7 8147 }
8d89bd70 8148 calldata->args.client = clp;
8d89bd70 8149 calldata->args.flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
bfab2817
TM		 8150 EXCHGID4_FLAG_BIND_PRINC_STATEID;
8151#ifdef CONFIG_NFS_V4_1_MIGRATION
8152 calldata->args.flags |= EXCHGID4_FLAG_SUPP_MOVED_MIGR;
8d89bd70
AA		 8153#endif
8154 msg.rpc_argp = &calldata->args;
8155 msg.rpc_resp = &calldata->res;
8156 task_setup_data.callback_data = calldata;
2031cd1a 8157
9c760d1f 8158 return rpc_run_task(&task_setup_data);
8d89bd70
AA		 8159
8160out_impl_id:
8161 kfree(calldata->res.impl_id);
8162out_server_scope:
8163 kfree(calldata->res.server_scope);
8164out_server_owner:
8165 kfree(calldata->res.server_owner);
8166out_calldata:
8167 kfree(calldata);
9c760d1f 8168out:
63513232 8169 nfs_put_client(clp);
9c760d1f
TM		 8170 return ERR_PTR(status);
8171}
8172
8173/*
8174 * _nfs4_proc_exchange_id()
8175 *
8176 * Wrapper for EXCHANGE_ID operation.
8177 */
a52458b4 8178static int _nfs4_proc_exchange_id(struct nfs_client *clp, const struct cred *cred,
9c760d1f
TM		 8179 u32 sp4_how)
8180{
8181 struct rpc_task *task;
8182 struct nfs41_exchange_id_args *argp;
8183 struct nfs41_exchange_id_res *resp;
8184 int status;
8185
8186 task = nfs4_run_exchange_id(clp, cred, sp4_how, NULL);
8187 if (IS_ERR(task))
8188 return PTR_ERR(task);
8189
8190 argp = task->tk_msg.rpc_argp;
8191 resp = task->tk_msg.rpc_resp;
8192 status = task->tk_status;
8193 if (status != 0)
8194 goto out;
8195
8196 status = nfs4_check_cl_exchange_flags(resp->flags);
8197 if (status != 0)
8198 goto out;
8199
8200 status = nfs4_sp4_select_mode(clp, &resp->state_protect);
8201 if (status != 0)
8202 goto out;
8203
8204 clp->cl_clientid = resp->clientid;
8205 clp->cl_exchange_flags = resp->flags;
8206 clp->cl_seqid = resp->seqid;
8207 /* Client ID is not confirmed */
8208 if (!(resp->flags & EXCHGID4_FLAG_CONFIRMED_R))
8209 clear_bit(NFS4_SESSION_ESTABLISHED,
8210 &clp->cl_session->session_state);
8211
8212 if (clp->cl_serverscope != NULL &&
8213 !nfs41_same_server_scope(clp->cl_serverscope,
8214 resp->server_scope)) {
8215 dprintk("%s: server_scope mismatch detected\n",
8216 __func__);
8217 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
8218 }
8219
8220 swap(clp->cl_serverowner, resp->server_owner);
8221 swap(clp->cl_serverscope, resp->server_scope);
8222 swap(clp->cl_implid, resp->impl_id);
8223
8224 /* Save the EXCHANGE_ID verifier session trunk tests */
8225 memcpy(clp->cl_confirm.data, argp->verifier.data,
8226 sizeof(clp->cl_confirm.data));
8227out:
8228 trace_nfs4_exchange_id(clp, status);
8229 rpc_put_task(task);
8230 return status;
99fe60d0
BH		 8231}
8232
2031cd1a
WAA		 8233/*
8234 * nfs4_proc_exchange_id()
8235 *
8236 * Returns zero, a negative errno, or a negative NFS4ERR status code.
8237 *
8238 * Since the clientid has expired, all compounds using sessions
8239 * associated with the stale clientid will be returning
8240 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
8241 * be in some phase of session reset.
8242 *
8243 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
8244 */
a52458b4 8245int nfs4_proc_exchange_id(struct nfs_client *clp, const struct cred *cred)
2031cd1a
WAA		 8246{
8247 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
8248 int status;
8249
8250 /* try SP4_MACH_CRED if krb5i/p */
8251 if (authflavor == RPC_AUTH_GSS_KRB5I ||
8252 authflavor == RPC_AUTH_GSS_KRB5P) {
9c760d1f 8253 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
2031cd1a
WAA		 8254 if (!status)
8255 return 0;
8256 }
8257
8258 /* try SP4_NONE */
9c760d1f 8259 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
2031cd1a
WAA		 8260}
8261
04fa2c6b
AA		 8262/**
8263 * nfs4_test_session_trunk
8264 *
8265 * This is an add_xprt_test() test function called from
8266 * rpc_clnt_setup_test_and_add_xprt.
8267 *
8268 * The rpc_xprt_switch is referrenced by rpc_clnt_setup_test_and_add_xprt
8269 * and is dereferrenced in nfs4_exchange_id_release
8270 *
8271 * Upon success, add the new transport to the rpc_clnt
8272 *
8273 * @clnt: struct rpc_clnt to get new transport
8274 * @xprt: the rpc_xprt to test
8275 * @data: call data for _nfs4_proc_exchange_id.
8276 */
10e037d1 8277void nfs4_test_session_trunk(struct rpc_clnt *clnt, struct rpc_xprt *xprt,
04fa2c6b
AA		 8278 void *data)
8279{
8280 struct nfs4_add_xprt_data *adata = (struct nfs4_add_xprt_data *)data;
9c760d1f
TM		 8281 struct rpc_task *task;
8282 int status;
8283
04fa2c6b
AA		 8284 u32 sp4_how;
8285
8286 dprintk("--> %s try %s\n", __func__,
8287 xprt->address_strings[RPC_DISPLAY_ADDR]);
8288
8289 sp4_how = (adata->clp->cl_sp4_flags == 0 ? SP4_NONE : SP4_MACH_CRED);
8290
8291 /* Test connection for session trunking. Async exchange_id call */
9c760d1f
TM		 8292 task = nfs4_run_exchange_id(adata->clp, adata->cred, sp4_how, xprt);
8293 if (IS_ERR(task))
10e037d1 8294 return;
9c760d1f
TM		 8295
8296 status = task->tk_status;
8297 if (status == 0)
8298 status = nfs4_detect_session_trunking(adata->clp,
8299 task->tk_msg.rpc_resp, xprt);
8300
10e037d1
S		 8301 if (status == 0)
8302 rpc_clnt_xprt_switch_add_xprt(clnt, xprt);
8303
9c760d1f 8304 rpc_put_task(task);
2031cd1a 8305}
04fa2c6b 8306EXPORT_SYMBOL_GPL(nfs4_test_session_trunk);
2031cd1a 8307
66245539 8308static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
a52458b4 8309 const struct cred *cred)
66245539
TM		 8310{
8311 struct rpc_message msg = {
8312 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
8313 .rpc_argp = clp,
8314 .rpc_cred = cred,
8315 };
8316 int status;
8317
5a0c257f
N		 8318 status = rpc_call_sync(clp->cl_rpcclient, &msg,
8319 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN);
c6d01c6f 8320 trace_nfs4_destroy_clientid(clp, status);
66245539 8321 if (status)
02c67525 8322 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 8323 "DESTROY_CLIENTID.", status, clp->cl_hostname);
8324 return status;
8325}
8326
8327static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
a52458b4 8328 const struct cred *cred)
66245539
TM		 8329{
8330 unsigned int loop;
8331 int ret;
8332
8333 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
8334 ret = _nfs4_proc_destroy_clientid(clp, cred);
8335 switch (ret) {
8336 case -NFS4ERR_DELAY:
8337 case -NFS4ERR_CLIENTID_BUSY:
8338 ssleep(1);
8339 break;
8340 default:
8341 return ret;
8342 }
8343 }
8344 return 0;
8345}
8346
8347int nfs4_destroy_clientid(struct nfs_client *clp)
8348{
a52458b4 8349 const struct cred *cred;
66245539
TM		 8350 int ret = 0;
8351
8352 if (clp->cl_mvops->minor_version < 1)
8353 goto out;
8354 if (clp->cl_exchange_flags == 0)
8355 goto out;
05f4c350
CL		 8356 if (clp->cl_preserve_clid)
8357 goto out;
73d8bde5 8358 cred = nfs4_get_clid_cred(clp);
66245539 8359 ret = nfs4_proc_destroy_clientid(clp, cred);
a52458b4 8360 put_cred(cred);
66245539
TM		 8361 switch (ret) {
8362 case 0:
8363 case -NFS4ERR_STALE_CLIENTID:
8364 clp->cl_exchange_flags = 0;
8365 }
8366out:
8367 return ret;
8368}
8369
0efb01b2
DB		 8370#endif /* CONFIG_NFS_V4_1 */
8371
2050f0cc
AA		 8372struct nfs4_get_lease_time_data {
8373 struct nfs4_get_lease_time_args *args;
8374 struct nfs4_get_lease_time_res *res;
8375 struct nfs_client *clp;
8376};
8377
8378static void nfs4_get_lease_time_prepare(struct rpc_task *task,
8379 void *calldata)
8380{
2050f0cc
AA		 8381 struct nfs4_get_lease_time_data *data =
8382 (struct nfs4_get_lease_time_data *)calldata;
8383
8384 dprintk("--> %s\n", __func__);
8385 /* just setup sequence, do not trigger session recovery
8386 since we're invoked within one */
7981c8a6 8387 nfs4_setup_sequence(data->clp,
d9afbd1b
TM		 8388 &data->args->la_seq_args,
8389 &data->res->lr_seq_res,
8390 task);
2050f0cc
AA		 8391 dprintk("<-- %s\n", __func__);
8392}
8393
8394/*
8395 * Called from nfs4_state_manager thread for session setup, so don't recover
8396 * from sequence operation or clientid errors.
8397 */
8398static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
8399{
8400 struct nfs4_get_lease_time_data *data =
8401 (struct nfs4_get_lease_time_data *)calldata;
8402
8403 dprintk("--> %s\n", __func__);
0efb01b2 8404 if (!nfs4_sequence_done(task, &data->res->lr_seq_res))
14516c3a 8405 return;
2050f0cc
AA		 8406 switch (task->tk_status) {
8407 case -NFS4ERR_DELAY:
8408 case -NFS4ERR_GRACE:
8409 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
8410 rpc_delay(task, NFS4_POLL_RETRY_MIN);
8411 task->tk_status = 0;
a8a4ae3a
AA		 8412 /* fall through */
8413 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 8414 rpc_restart_call_prepare(task);
2050f0cc
AA		 8415 return;
8416 }
2050f0cc
AA		 8417 dprintk("<-- %s\n", __func__);
8418}
8419
17280175 8420static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 8421 .rpc_call_prepare = nfs4_get_lease_time_prepare,
8422 .rpc_call_done = nfs4_get_lease_time_done,
8423};
8424
8425int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
8426{
2050f0cc
AA		 8427 struct nfs4_get_lease_time_args args;
8428 struct nfs4_get_lease_time_res res = {
8429 .lr_fsinfo = fsinfo,
8430 };
8431 struct nfs4_get_lease_time_data data = {
8432 .args = &args,
8433 .res = &res,
8434 .clp = clp,
8435 };
8436 struct rpc_message msg = {
8437 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
8438 .rpc_argp = &args,
8439 .rpc_resp = &res,
8440 };
8441 struct rpc_task_setup task_setup = {
8442 .rpc_client = clp->cl_rpcclient,
8443 .rpc_message = &msg,
8444 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 8445 .callback_data = &data,
8446 .flags = RPC_TASK_TIMEOUT,
2050f0cc 8447 };
2050f0cc 8448
fba83f34 8449 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0, 1);
f836b27e 8450 return nfs4_call_sync_custom(&task_setup);
2050f0cc
AA		 8451}
8452
0efb01b2
DB		 8453#ifdef CONFIG_NFS_V4_1
8454
fc931582
AA		 8455/*
8456 * Initialize the values to be used by the client in CREATE_SESSION
8457 * If nfs4_init_session set the fore channel request and response sizes,
8458 * use them.
8459 *
8460 * Set the back channel max_resp_sz_cached to zero to force the client to
8461 * always set csa_cachethis to FALSE because the current implementation
8462 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
8463 */
6b26cc8c
CL		 8464static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args,
8465 struct rpc_clnt *clnt)
fc931582 8466{
18aad3d5 8467 unsigned int max_rqst_sz, max_resp_sz;
6b26cc8c 8468 unsigned int max_bc_payload = rpc_max_bc_payload(clnt);
7402a4fe 8469 unsigned int max_bc_slots = rpc_num_bc_slots(clnt);
18aad3d5
AA		 8470
8471 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
8472 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 8473
fc931582 8474 /* Fore channel attributes */
18aad3d5
AA		 8475 args->fc_attrs.max_rqst_sz = max_rqst_sz;
8476 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 8477 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 8478 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 8479
8480 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 8481 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 8482 __func__,
8483 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 8484 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 8485
8486 /* Back channel attributes */
6b26cc8c
CL		 8487 args->bc_attrs.max_rqst_sz = max_bc_payload;
8488 args->bc_attrs.max_resp_sz = max_bc_payload;
fc931582
AA		 8489 args->bc_attrs.max_resp_sz_cached = 0;
8490 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
62421cd9 8491 args->bc_attrs.max_reqs = max_t(unsigned short, max_session_cb_slots, 1);
7402a4fe
TM		 8492 if (args->bc_attrs.max_reqs > max_bc_slots)
8493 args->bc_attrs.max_reqs = max_bc_slots;
fc931582
AA		 8494
8495 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
8496 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
8497 __func__,
8498 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
8499 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
8500 args->bc_attrs.max_reqs);
8501}
8502
79969dd1
TM		 8503static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args,
8504 struct nfs41_create_session_res *res)
8d35301d 8505{
43c2e885 8506 struct nfs4_channel_attrs *sent = &args->fc_attrs;
79969dd1 8507 struct nfs4_channel_attrs *rcvd = &res->fc_attrs;
43c2e885 8508
43c2e885
BF		 8509 if (rcvd->max_resp_sz > sent->max_resp_sz)
8510 return -EINVAL;
8511 /*
8512 * Our requested max_ops is the minimum we need; we're not
8513 * prepared to break up compounds into smaller pieces than that.
8514 * So, no point even trying to continue if the server won't
8515 * cooperate:
8516 */
8517 if (rcvd->max_ops < sent->max_ops)
8518 return -EINVAL;
8519 if (rcvd->max_reqs == 0)
8520 return -EINVAL;
b4b9a0c1
VG		 8521 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
8522 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 8523 return 0;
8d35301d
AA		 8524}
8525
79969dd1
TM		 8526static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args,
8527 struct nfs41_create_session_res *res)
43c2e885
BF		 8528{
8529 struct nfs4_channel_attrs *sent = &args->bc_attrs;
79969dd1 8530 struct nfs4_channel_attrs *rcvd = &res->bc_attrs;
8d35301d 8531
b1c0df5f
TM		 8532 if (!(res->flags & SESSION4_BACK_CHAN))
8533 goto out;
43c2e885
BF		 8534 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
8535 return -EINVAL;
8536 if (rcvd->max_resp_sz < sent->max_resp_sz)
8537 return -EINVAL;
8538 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
8539 return -EINVAL;
5405fc44 8540 if (rcvd->max_ops > sent->max_ops)
43c2e885 8541 return -EINVAL;
5405fc44 8542 if (rcvd->max_reqs > sent->max_reqs)
43c2e885 8543 return -EINVAL;
b1c0df5f 8544out:
43c2e885
BF		 8545 return 0;
8546}
8d35301d 8547
8d35301d 8548static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
79969dd1 8549 struct nfs41_create_session_res *res)
8d35301d 8550{
43c2e885 8551 int ret;
8d35301d 8552
79969dd1 8553 ret = nfs4_verify_fore_channel_attrs(args, res);
43c2e885
BF		 8554 if (ret)
8555 return ret;
79969dd1
TM		 8556 return nfs4_verify_back_channel_attrs(args, res);
8557}
8558
8559static void nfs4_update_session(struct nfs4_session *session,
8560 struct nfs41_create_session_res *res)
8561{
8562 nfs4_copy_sessionid(&session->sess_id, &res->sessionid);
e11259f9
TM		 8563 /* Mark client id and session as being confirmed */
8564 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;
8565 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state);
79969dd1
TM		 8566 session->flags = res->flags;
8567 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs));
b1c0df5f
TM		 8568 if (res->flags & SESSION4_BACK_CHAN)
8569 memcpy(&session->bc_attrs, &res->bc_attrs,
8570 sizeof(session->bc_attrs));
8d35301d
AA		 8571}
8572
848f5bda 8573static int _nfs4_proc_create_session(struct nfs_client *clp,
a52458b4 8574 const struct cred *cred)
fc931582
AA		 8575{
8576 struct nfs4_session *session = clp->cl_session;
8577 struct nfs41_create_session_args args = {
8578 .client = clp,
79969dd1
TM		 8579 .clientid = clp->cl_clientid,
8580 .seqid = clp->cl_seqid,
fc931582
AA		 8581 .cb_program = NFS4_CALLBACK,
8582 };
79969dd1
TM		 8583 struct nfs41_create_session_res res;
8584
fc931582
AA		 8585 struct rpc_message msg = {
8586 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
8587 .rpc_argp = &args,
8588 .rpc_resp = &res,
848f5bda 8589 .rpc_cred = cred,
fc931582
AA		 8590 };
8591 int status;
8592
6b26cc8c 8593 nfs4_init_channel_attrs(&args, clp->cl_rpcclient);
0f91421e 8594 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 8595
5a0c257f
N		 8596 status = rpc_call_sync(session->clp->cl_rpcclient, &msg,
8597 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN);
c6d01c6f 8598 trace_nfs4_create_session(clp, status);
fc931582 8599
b519d408
TM		 8600 switch (status) {
8601 case -NFS4ERR_STALE_CLIENTID:
8602 case -NFS4ERR_DELAY:
8603 case -ETIMEDOUT:
8604 case -EACCES:
8605 case -EAGAIN:
8606 goto out;
8607 };
8608
8609 clp->cl_seqid++;
43095d39 8610 if (!status) {
8d35301d 8611 /* Verify the session's negotiated channel_attrs values */
79969dd1 8612 status = nfs4_verify_channel_attrs(&args, &res);
fc931582 8613 /* Increment the clientid slot sequence id */
79969dd1
TM		 8614 if (status)
8615 goto out;
8616 nfs4_update_session(session, &res);
fc931582 8617 }
79969dd1 8618out:
fc931582
AA		 8619 return status;
8620}
8621
8622/*
8623 * Issues a CREATE_SESSION operation to the server.
8624 * It is the responsibility of the caller to verify the session is
8625 * expired before calling this routine.
8626 */
a52458b4 8627int nfs4_proc_create_session(struct nfs_client *clp, const struct cred *cred)
fc931582
AA		 8628{
8629 int status;
8630 unsigned *ptr;
fc931582
AA		 8631 struct nfs4_session *session = clp->cl_session;
8632
8633 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
8634
848f5bda 8635 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 8636 if (status)
8637 goto out;
8638
aacd5537
AA		 8639 /* Init or reset the session slot tables */
8640 status = nfs4_setup_session_slot_tables(session);
8641 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 8642 if (status)
8643 goto out;
8644
8645 ptr = (unsigned *)&session->sess_id.data[0];
8646 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
8647 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 8648out:
8649 dprintk("<-- %s\n", __func__);
8650 return status;
8651}
8652
0f3e66c6
AA		 8653/*
8654 * Issue the over-the-wire RPC DESTROY_SESSION.
8655 * The caller must serialize access to this routine.
8656 */
848f5bda 8657int nfs4_proc_destroy_session(struct nfs4_session *session,
a52458b4 8658 const struct cred *cred)
0f3e66c6 8659{
848f5bda
TM		 8660 struct rpc_message msg = {
8661 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
8662 .rpc_argp = session,
8663 .rpc_cred = cred,
8664 };
0f3e66c6 8665 int status = 0;
0f3e66c6
AA		 8666
8667 dprintk("--> nfs4_proc_destroy_session\n");
8668
8669 /* session is still being setup */
e11259f9
TM		 8670 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state))
8671 return 0;
0f3e66c6 8672
5a0c257f
N		 8673 status = rpc_call_sync(session->clp->cl_rpcclient, &msg,
8674 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN);
c6d01c6f 8675 trace_nfs4_destroy_session(session->clp, status);
0f3e66c6
AA		 8676
8677 if (status)
08106ac7 8678 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 8679 "Session has been destroyed regardless...\n", status);
8680
8681 dprintk("<-- nfs4_proc_destroy_session\n");
8682 return status;
8683}
8684
fc01cea9
AA		 8685/*
8686 * Renew the cl_session lease.
8687 */
d5f8d3fe
TM		 8688struct nfs4_sequence_data {
8689 struct nfs_client *clp;
8690 struct nfs4_sequence_args args;
8691 struct nfs4_sequence_res res;
8692};
8693
dc96aef9
AB		 8694static void nfs41_sequence_release(void *data)
8695{
d5f8d3fe
TM		 8696 struct nfs4_sequence_data *calldata = data;
8697 struct nfs_client *clp = calldata->clp;
dc96aef9 8698
212bf41d 8699 if (refcount_read(&clp->cl_count) > 1)
7135840f
AB		 8700 nfs4_schedule_state_renewal(clp);
8701 nfs_put_client(clp);
d5f8d3fe 8702 kfree(calldata);
dc96aef9
AB		 8703}
8704
aa5190d0
TM		 8705static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
8706{
8707 switch(task->tk_status) {
8708 case -NFS4ERR_DELAY:
aa5190d0
TM		 8709 rpc_delay(task, NFS4_POLL_RETRY_MAX);
8710 return -EAGAIN;
8711 default:
0400a6b0 8712 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 8713 }
8714 return 0;
8715}
8716
dc96aef9 8717static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 8718{
d5f8d3fe
TM		 8719 struct nfs4_sequence_data *calldata = data;
8720 struct nfs_client *clp = calldata->clp;
fc01cea9 8721
14516c3a
TM		 8722 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
8723 return;
fc01cea9 8724
c6d01c6f 8725 trace_nfs4_sequence(clp, task->tk_status);
fc01cea9
AA		 8726 if (task->tk_status < 0) {
8727 dprintk("%s ERROR %d\n", __func__, task->tk_status);
212bf41d 8728 if (refcount_read(&clp->cl_count) == 1)
7135840f 8729 goto out;
fc01cea9 8730
aa5190d0
TM		 8731 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
8732 rpc_restart_call_prepare(task);
fc01cea9
AA		 8733 return;
8734 }
8735 }
fc01cea9 8736 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 8737out:
fc01cea9
AA		 8738 dprintk("<-- %s\n", __func__);
8739}
8740
8741static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
8742{
d5f8d3fe
TM		 8743 struct nfs4_sequence_data *calldata = data;
8744 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 8745 struct nfs4_sequence_args *args;
8746 struct nfs4_sequence_res *res;
8747
fc01cea9
AA		 8748 args = task->tk_msg.rpc_argp;
8749 res = task->tk_msg.rpc_resp;
8750
7981c8a6 8751 nfs4_setup_sequence(clp, args, res, task);
fc01cea9
AA		 8752}
8753
8754static const struct rpc_call_ops nfs41_sequence_ops = {
8755 .rpc_call_done = nfs41_sequence_call_done,
8756 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 8757 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 8758};
8759
8fe72bac 8760static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
a52458b4 8761 const struct cred *cred,
3be0f80b 8762 struct nfs4_slot *slot,
8fe72bac 8763 bool is_privileged)
fc01cea9 8764{
d5f8d3fe 8765 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 8766 struct rpc_message msg = {
8767 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
8768 .rpc_cred = cred,
8769 };
71ac6da9
TM		 8770 struct rpc_task_setup task_setup_data = {
8771 .rpc_client = clp->cl_rpcclient,
8772 .rpc_message = &msg,
8fe72bac 8773 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 8774 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 8775 };
3be0f80b 8776 struct rpc_task *ret;
fc01cea9 8777
3be0f80b 8778 ret = ERR_PTR(-EIO);
212bf41d 8779 if (!refcount_inc_not_zero(&clp->cl_count))
3be0f80b
TM		 8780 goto out_err;
8781
8782 ret = ERR_PTR(-ENOMEM);
dfb4f309 8783 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
3be0f80b
TM		 8784 if (calldata == NULL)
8785 goto out_put_clp;
fba83f34 8786 nfs4_init_sequence(&calldata->args, &calldata->res, 0, is_privileged);
3be0f80b 8787 nfs4_sequence_attach_slot(&calldata->args, &calldata->res, slot);
d5f8d3fe
TM		 8788 msg.rpc_argp = &calldata->args;
8789 msg.rpc_resp = &calldata->res;
8790 calldata->clp = clp;
71ac6da9 8791 task_setup_data.callback_data = calldata;
fc01cea9 8792
3be0f80b
TM		 8793 ret = rpc_run_task(&task_setup_data);
8794 if (IS_ERR(ret))
8795 goto out_err;
8796 return ret;
8797out_put_clp:
8798 nfs_put_client(clp);
8799out_err:
8800 nfs41_release_slot(slot);
8801 return ret;
71ac6da9
TM		 8802}
8803
a52458b4 8804static int nfs41_proc_async_sequence(struct nfs_client *clp, const struct cred *cred, unsigned renew_flags)
71ac6da9
TM		 8805{
8806 struct rpc_task *task;
8807 int ret = 0;
8808
2f60ea6b 8809 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
d1f456b0 8810 return -EAGAIN;
3be0f80b 8811 task = _nfs41_proc_sequence(clp, cred, NULL, false);
71ac6da9
TM		 8812 if (IS_ERR(task))
8813 ret = PTR_ERR(task);
8814 else
bf294b41 8815 rpc_put_task_async(task);
71ac6da9
TM		 8816 dprintk("<-- %s status=%d\n", __func__, ret);
8817 return ret;
8818}
8819
a52458b4 8820static int nfs4_proc_sequence(struct nfs_client *clp, const struct cred *cred)
71ac6da9
TM		 8821{
8822 struct rpc_task *task;
8823 int ret;
8824
3be0f80b 8825 task = _nfs41_proc_sequence(clp, cred, NULL, true);
71ac6da9
TM		 8826 if (IS_ERR(task)) {
8827 ret = PTR_ERR(task);
8828 goto out;
8829 }
8830 ret = rpc_wait_for_completion_task(task);
be824167 8831 if (!ret)
71ac6da9
TM		 8832 ret = task->tk_status;
8833 rpc_put_task(task);
8834out:
8835 dprintk("<-- %s status=%d\n", __func__, ret);
8836 return ret;
fc01cea9
AA		 8837}
8838
fce5c838
RL		 8839struct nfs4_reclaim_complete_data {
8840 struct nfs_client *clp;
8841 struct nfs41_reclaim_complete_args arg;
8842 struct nfs41_reclaim_complete_res res;
8843};
8844
8845static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
8846{
8847 struct nfs4_reclaim_complete_data *calldata = data;
8848
7981c8a6 8849 nfs4_setup_sequence(calldata->clp,
d9afbd1b
TM		 8850 &calldata->arg.seq_args,
8851 &calldata->res.seq_res,
8852 task);
fce5c838
RL		 8853}
8854
aa5190d0
TM		 8855static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
8856{
8857 switch(task->tk_status) {
8858 case 0:
57174593
JL		 8859 wake_up_all(&clp->cl_lock_waitq);
8860 /* Fallthrough */
aa5190d0
TM		 8861 case -NFS4ERR_COMPLETE_ALREADY:
8862 case -NFS4ERR_WRONG_CRED: /* What to do here? */
8863 break;
8864 case -NFS4ERR_DELAY:
aa5190d0 8865 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 8866 /* fall through */
8867 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0 8868 return -EAGAIN;
0048fdd0
TM		 8869 case -NFS4ERR_BADSESSION:
8870 case -NFS4ERR_DEADSESSION:
8871 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
8872 nfs4_schedule_session_recovery(clp->cl_session,
8873 task->tk_status);
8874 break;
aa5190d0 8875 default:
0400a6b0 8876 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 8877 }
8878 return 0;
8879}
8880
fce5c838
RL		 8881static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
8882{
8883 struct nfs4_reclaim_complete_data *calldata = data;
8884 struct nfs_client *clp = calldata->clp;
8885 struct nfs4_sequence_res *res = &calldata->res.seq_res;
8886
8887 dprintk("--> %s\n", __func__);
14516c3a
TM		 8888 if (!nfs41_sequence_done(task, res))
8889 return;
fce5c838 8890
c6d01c6f 8891 trace_nfs4_reclaim_complete(clp, task->tk_status);
aa5190d0
TM		 8892 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
8893 rpc_restart_call_prepare(task);
8894 return;
8895 }
fce5c838
RL		 8896 dprintk("<-- %s\n", __func__);
8897}
8898
8899static void nfs4_free_reclaim_complete_data(void *data)
8900{
8901 struct nfs4_reclaim_complete_data *calldata = data;
8902
8903 kfree(calldata);
8904}
8905
8906static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
8907 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
8908 .rpc_call_done = nfs4_reclaim_complete_done,
8909 .rpc_release = nfs4_free_reclaim_complete_data,
8910};
8911
8912/*
8913 * Issue a global reclaim complete.
8914 */
965e9c23 8915static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
a52458b4 8916 const struct cred *cred)
fce5c838
RL		 8917{
8918 struct nfs4_reclaim_complete_data *calldata;
fce5c838
RL		 8919 struct rpc_message msg = {
8920 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 8921 .rpc_cred = cred,
fce5c838
RL		 8922 };
8923 struct rpc_task_setup task_setup_data = {
8924 .rpc_client = clp->cl_rpcclient,
8925 .rpc_message = &msg,
8926 .callback_ops = &nfs4_reclaim_complete_call_ops,
4c952e3d 8927 .flags = RPC_TASK_NO_ROUND_ROBIN,
fce5c838
RL		 8928 };
8929 int status = -ENOMEM;
8930
8931 dprintk("--> %s\n", __func__);
8535b2be 8932 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 8933 if (calldata == NULL)
8934 goto out;
8935 calldata->clp = clp;
8936 calldata->arg.one_fs = 0;
fce5c838 8937
fba83f34 8938 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0, 1);
fce5c838
RL		 8939 msg.rpc_argp = &calldata->arg;
8940 msg.rpc_resp = &calldata->res;
8941 task_setup_data.callback_data = calldata;
4c952e3d 8942 status = nfs4_call_sync_custom(&task_setup_data);
fce5c838
RL		 8943out:
8944 dprintk("<-- %s status=%d\n", __func__, status);
8945 return status;
8946}
b1f69b75
AA		 8947
8948static void
8949nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
8950{
8951 struct nfs4_layoutget *lgp = calldata;
c31663d4 8952 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
b1f69b75
AA		 8953
8954 dprintk("--> %s\n", __func__);
7981c8a6 8955 nfs4_setup_sequence(server->nfs_client, &lgp->args.seq_args,
183d9e7b
JL		 8956 &lgp->res.seq_res, task);
8957 dprintk("<-- %s\n", __func__);
b1f69b75
AA		 8958}
8959
8960static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
8961{
8962 struct nfs4_layoutget *lgp = calldata;
183d9e7b
JL		 8963
8964 dprintk("--> %s\n", __func__);
2e80dbe7 8965 nfs41_sequence_process(task, &lgp->res.seq_res);
183d9e7b
JL		 8966 dprintk("<-- %s\n", __func__);
8967}
8968
8969static int
8970nfs4_layoutget_handle_exception(struct rpc_task *task,
8971 struct nfs4_layoutget *lgp, struct nfs4_exception *exception)
8972{
ee314c2a
TM		 8973 struct inode *inode = lgp->args.inode;
8974 struct nfs_server *server = NFS_SERVER(inode);
8975 struct pnfs_layout_hdr *lo;
e85d7ee4
TM		 8976 int nfs4err = task->tk_status;
8977 int err, status = 0;
f7db0b28 8978 LIST_HEAD(head);
b1f69b75 8979
ed7e5423 8980 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
b1f69b75 8981
2dbf8dff
TM		 8982 nfs4_sequence_free_slot(&lgp->res.seq_res);
8983
e85d7ee4 8984 switch (nfs4err) {
b1f69b75 8985 case 0:
ee314c2a 8986 goto out;
7c1e6e58
PT		 8987
8988 /*
8989 * NFS4ERR_LAYOUTUNAVAILABLE means we are not supposed to use pnfs
8990 * on the file. set tk_status to -ENODATA to tell upper layer to
8991 * retry go inband.
8992 */
8993 case -NFS4ERR_LAYOUTUNAVAILABLE:
183d9e7b 8994 status = -ENODATA;
7c1e6e58 8995 goto out;
21b874c8
TM		 8996 /*
8997 * NFS4ERR_BADLAYOUT means the MDS cannot return a layout of
8998 * length lgp->args.minlength != 0 (see RFC5661 section 18.43.3).
8999 */
9000 case -NFS4ERR_BADLAYOUT:
183d9e7b
JL		 9001 status = -EOVERFLOW;
9002 goto out;
ed7e5423
BH		 9003 /*
9004 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
21b874c8
TM		 9005 * (or clients) writing to the same RAID stripe except when
9006 * the minlength argument is 0 (see RFC5661 section 18.43.3).
183d9e7b
JL		 9007 *
9008 * Treat it like we would RECALLCONFLICT -- we retry for a little
9009 * while, and then eventually give up.
ed7e5423 9010 */
b1f69b75 9011 case -NFS4ERR_LAYOUTTRYLATER:
183d9e7b
JL		 9012 if (lgp->args.minlength == 0) {
9013 status = -EOVERFLOW;
9014 goto out;
ed7e5423 9015 }
e85d7ee4
TM		 9016 status = -EBUSY;
9017 break;
183d9e7b 9018 case -NFS4ERR_RECALLCONFLICT:
183d9e7b 9019 status = -ERECALLCONFLICT;
e85d7ee4 9020 break;
26f47443
TM		 9021 case -NFS4ERR_DELEG_REVOKED:
9022 case -NFS4ERR_ADMIN_REVOKED:
ee314c2a
TM		 9023 case -NFS4ERR_EXPIRED:
9024 case -NFS4ERR_BAD_STATEID:
183d9e7b 9025 exception->timeout = 0;
ee314c2a 9026 spin_lock(&inode->i_lock);
f7db0b28
TM		 9027 lo = NFS_I(inode)->layout;
9028 /* If the open stateid was bad, then recover it. */
9029 if (!lo || test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) ||
e8fa33a6 9030 !nfs4_stateid_match_other(&lgp->args.stateid, &lo->plh_stateid)) {
ee314c2a 9031 spin_unlock(&inode->i_lock);
183d9e7b 9032 exception->state = lgp->args.ctx->state;
26f47443 9033 exception->stateid = &lgp->args.stateid;
2259f960
TM		 9034 break;
9035 }
f7db0b28
TM		 9036
9037 /*
9038 * Mark the bad layout state as invalid, then retry
9039 */
668f455d 9040 pnfs_mark_layout_stateid_invalid(lo, &head);
f7db0b28 9041 spin_unlock(&inode->i_lock);
1f18b82c 9042 nfs_commit_inode(inode, 0);
f7db0b28
TM		 9043 pnfs_free_lseg_list(&head);
9044 status = -EAGAIN;
9045 goto out;
b1f69b75 9046 }
183d9e7b 9047
e85d7ee4
TM		 9048 err = nfs4_handle_exception(server, nfs4err, exception);
9049 if (!status) {
9050 if (exception->retry)
9051 status = -EAGAIN;
9052 else
9053 status = err;
9054 }
ee314c2a 9055out:
b1f69b75 9056 dprintk("<-- %s\n", __func__);
183d9e7b 9057 return status;
b1f69b75
AA		 9058}
9059
dacb452d 9060size_t max_response_pages(struct nfs_server *server)
8554116e
IK		 9061{
9062 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
9063 return nfs_page_array_len(0, max_resp_sz);
9064}
9065
b1f69b75
AA		 9066static void nfs4_layoutget_release(void *calldata)
9067{
9068 struct nfs4_layoutget *lgp = calldata;
9069
9070 dprintk("--> %s\n", __func__);
bd171930 9071 nfs4_sequence_free_slot(&lgp->res.seq_res);
29a8bfe5 9072 pnfs_layoutget_free(lgp);
b1f69b75
AA		 9073 dprintk("<-- %s\n", __func__);
9074}
9075
9076static const struct rpc_call_ops nfs4_layoutget_call_ops = {
9077 .rpc_call_prepare = nfs4_layoutget_prepare,
9078 .rpc_call_done = nfs4_layoutget_done,
9079 .rpc_release = nfs4_layoutget_release,
9080};
9081
a0b0a6e3 9082struct pnfs_layout_segment *
dacb452d 9083nfs4_proc_layoutget(struct nfs4_layoutget *lgp, long *timeout)
b1f69b75 9084{
a47970ff
WAA		 9085 struct inode *inode = lgp->args.inode;
9086 struct nfs_server *server = NFS_SERVER(inode);
b1f69b75
AA		 9087 struct rpc_task *task;
9088 struct rpc_message msg = {
9089 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
9090 .rpc_argp = &lgp->args,
9091 .rpc_resp = &lgp->res,
6ab59344 9092 .rpc_cred = lgp->cred,
b1f69b75
AA		 9093 };
9094 struct rpc_task_setup task_setup_data = {
9095 .rpc_client = server->client,
9096 .rpc_message = &msg,
9097 .callback_ops = &nfs4_layoutget_call_ops,
9098 .callback_data = lgp,
9099 .flags = RPC_TASK_ASYNC,
9100 };
a0b0a6e3 9101 struct pnfs_layout_segment *lseg = NULL;
bc23676c
TM		 9102 struct nfs4_exception exception = {
9103 .inode = inode,
9104 .timeout = *timeout,
9105 };
b1f69b75
AA		 9106 int status = 0;
9107
9108 dprintk("--> %s\n", __func__);
9109
4bd5a980
PT		 9110 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
9111 pnfs_get_layout_hdr(NFS_I(inode)->layout);
9112
fba83f34 9113 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0, 0);
a47970ff 9114
b1f69b75
AA		 9115 task = rpc_run_task(&task_setup_data);
9116 if (IS_ERR(task))
a0b0a6e3 9117 return ERR_CAST(task);
820bf85c 9118 status = rpc_wait_for_completion_task(task);
2dbf8dff
TM		 9119 if (status != 0)
9120 goto out;
9121
18c0778a 9122 if (task->tk_status < 0) {
183d9e7b
JL		 9123 status = nfs4_layoutget_handle_exception(task, lgp, &exception);
9124 *timeout = exception.timeout;
18c0778a
TM		 9125 } else if (lgp->res.layoutp->len == 0) {
9126 status = -EAGAIN;
9127 *timeout = nfs4_update_delay(&exception.timeout);
2dbf8dff
TM		 9128 } else
9129 lseg = pnfs_layout_process(lgp);
9130out:
1037e6ea
TM		 9131 trace_nfs4_layoutget(lgp->args.ctx,
9132 &lgp->args.range,
9133 &lgp->res.range,
48c9579a 9134 &lgp->res.stateid,
1037e6ea 9135 status);
183d9e7b 9136
b1f69b75
AA		 9137 rpc_put_task(task);
9138 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 9139 if (status)
9140 return ERR_PTR(status);
9141 return lseg;
b1f69b75
AA		 9142}
9143
cbe82603
BH		 9144static void
9145nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
9146{
9147 struct nfs4_layoutreturn *lrp = calldata;
9148
9149 dprintk("--> %s\n", __func__);
7981c8a6 9150 nfs4_setup_sequence(lrp->clp,
d9afbd1b
TM		 9151 &lrp->args.seq_args,
9152 &lrp->res.seq_res,
9153 task);
c8bf7073
TM		 9154 if (!pnfs_layout_is_valid(lrp->args.layout))
9155 rpc_exit(task, 0);
cbe82603
BH		 9156}
9157
9158static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
9159{
9160 struct nfs4_layoutreturn *lrp = calldata;
9161 struct nfs_server *server;
9162
9163 dprintk("--> %s\n", __func__);
9164
2e80dbe7 9165 if (!nfs41_sequence_process(task, &lrp->res.seq_res))
cbe82603
BH		 9166 return;
9167
6109bcf7
TM		 9168 /*
9169 * Was there an RPC level error? Assume the call succeeded,
9170 * and that we need to release the layout
9171 */
9172 if (task->tk_rpc_status != 0 && RPC_WAS_SENT(task)) {
9173 lrp->res.lrs_present = 0;
9174 return;
9175 }
9176
cbe82603 9177 server = NFS_SERVER(lrp->args.inode);
f22e5edd 9178 switch (task->tk_status) {
ff90514e 9179 case -NFS4ERR_OLD_STATEID:
30cb3ee2 9180 if (nfs4_layout_refresh_old_stateid(&lrp->args.stateid,
ecf84026 9181 &lrp->args.range,
ff90514e
TM		 9182 lrp->args.inode))
9183 goto out_restart;
9184 /* Fallthrough */
f22e5edd
TM		 9185 default:
9186 task->tk_status = 0;
ff90514e 9187 /* Fallthrough */
f22e5edd
TM		 9188 case 0:
9189 break;
9190 case -NFS4ERR_DELAY:
8478eaa1 9191 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
f22e5edd 9192 break;
ff90514e 9193 goto out_restart;
cbe82603 9194 }
cbe82603 9195 dprintk("<-- %s\n", __func__);
ff90514e
TM		 9196 return;
9197out_restart:
9198 task->tk_status = 0;
9199 nfs4_sequence_free_slot(&lrp->res.seq_res);
9200 rpc_restart_call_prepare(task);
cbe82603
BH		 9201}
9202
9203static void nfs4_layoutreturn_release(void *calldata)
9204{
9205 struct nfs4_layoutreturn *lrp = calldata;
849b286f 9206 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 9207
9208 dprintk("--> %s\n", __func__);
2a974425 9209 pnfs_layoutreturn_free_lsegs(lo, &lrp->args.stateid, &lrp->args.range,
68f74479 9210 lrp->res.lrs_present ? &lrp->res.stateid : NULL);
2e80dbe7 9211 nfs4_sequence_free_slot(&lrp->res.seq_res);
4d796d75
TM		 9212 if (lrp->ld_private.ops && lrp->ld_private.ops->free)
9213 lrp->ld_private.ops->free(&lrp->ld_private);
2f065ddb
TM		 9214 pnfs_put_layout_hdr(lrp->args.layout);
9215 nfs_iput_and_deactive(lrp->inode);
cbe82603
BH		 9216 kfree(calldata);
9217 dprintk("<-- %s\n", __func__);
9218}
9219
9220static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
9221 .rpc_call_prepare = nfs4_layoutreturn_prepare,
9222 .rpc_call_done = nfs4_layoutreturn_done,
9223 .rpc_release = nfs4_layoutreturn_release,
9224};
9225
6c16605d 9226int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync)
cbe82603
BH		 9227{
9228 struct rpc_task *task;
9229 struct rpc_message msg = {
9230 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
9231 .rpc_argp = &lrp->args,
9232 .rpc_resp = &lrp->res,
9556000d 9233 .rpc_cred = lrp->cred,
cbe82603
BH		 9234 };
9235 struct rpc_task_setup task_setup_data = {
1771c577 9236 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
cbe82603
BH		 9237 .rpc_message = &msg,
9238 .callback_ops = &nfs4_layoutreturn_call_ops,
9239 .callback_data = lrp,
9240 };
6c16605d 9241 int status = 0;
cbe82603 9242
99ade3c7
AE		 9243 nfs4_state_protect(NFS_SERVER(lrp->args.inode)->nfs_client,
9244 NFS_SP4_MACH_CRED_PNFS_CLEANUP,
9245 &task_setup_data.rpc_client, &msg);
9246
cbe82603 9247 dprintk("--> %s\n", __func__);
5a0ec8ac
TM		 9248 if (!sync) {
9249 lrp->inode = nfs_igrab_and_active(lrp->args.inode);
9250 if (!lrp->inode) {
9251 nfs4_layoutreturn_release(lrp);
9252 return -EAGAIN;
9253 }
9254 task_setup_data.flags |= RPC_TASK_ASYNC;
9255 }
fba83f34 9256 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1, 0);
cbe82603
BH		 9257 task = rpc_run_task(&task_setup_data);
9258 if (IS_ERR(task))
9259 return PTR_ERR(task);
5a0ec8ac
TM		 9260 if (sync)
9261 status = task->tk_status;
48c9579a 9262 trace_nfs4_layoutreturn(lrp->args.inode, &lrp->args.stateid, status);
cbe82603
BH		 9263 dprintk("<-- %s status=%d\n", __func__, status);
9264 rpc_put_task(task);
9265 return status;
9266}
9267
b1f69b75 9268static int
cd5875fe
TM		 9269_nfs4_proc_getdeviceinfo(struct nfs_server *server,
9270 struct pnfs_device *pdev,
a52458b4 9271 const struct cred *cred)
b1f69b75
AA		 9272{
9273 struct nfs4_getdeviceinfo_args args = {
9274 .pdev = pdev,
4e590803
TM		 9275 .notify_types = NOTIFY_DEVICEID4_CHANGE |
9276 NOTIFY_DEVICEID4_DELETE,
b1f69b75
AA		 9277 };
9278 struct nfs4_getdeviceinfo_res res = {
9279 .pdev = pdev,
9280 };
9281 struct rpc_message msg = {
9282 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
9283 .rpc_argp = &args,
9284 .rpc_resp = &res,
cd5875fe 9285 .rpc_cred = cred,
b1f69b75
AA		 9286 };
9287 int status;
9288
9289 dprintk("--> %s\n", __func__);
7c513058 9290 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4e590803
TM		 9291 if (res.notification & ~args.notify_types)
9292 dprintk("%s: unsupported notification\n", __func__);
df52699e
TM		 9293 if (res.notification != args.notify_types)
9294 pdev->nocache = 1;
4e590803 9295
b1f69b75
AA		 9296 dprintk("<-- %s status=%d\n", __func__, status);
9297
9298 return status;
9299}
9300
cd5875fe
TM		 9301int nfs4_proc_getdeviceinfo(struct nfs_server *server,
9302 struct pnfs_device *pdev,
a52458b4 9303 const struct cred *cred)
b1f69b75
AA		 9304{
9305 struct nfs4_exception exception = { };
9306 int err;
9307
9308 do {
9309 err = nfs4_handle_exception(server,
cd5875fe 9310 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 9311 &exception);
9312 } while (exception.retry);
9313 return err;
9314}
9315EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
9316
863a3c6c
AA		 9317static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
9318{
9319 struct nfs4_layoutcommit_data *data = calldata;
9320 struct nfs_server *server = NFS_SERVER(data->args.inode);
9321
7981c8a6 9322 nfs4_setup_sequence(server->nfs_client,
d9afbd1b
TM		 9323 &data->args.seq_args,
9324 &data->res.seq_res,
9325 task);
863a3c6c
AA		 9326}
9327
9328static void
9329nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
9330{
9331 struct nfs4_layoutcommit_data *data = calldata;
9332 struct nfs_server *server = NFS_SERVER(data->args.inode);
9333
6ba7db34 9334 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 9335 return;
9336
9337 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 9338 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
9339 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
9340 case -NFS4ERR_BADLAYOUT: /* no layout */
9341 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 9342 task->tk_status = 0;
e59d27e0 9343 case 0:
e59d27e0
TM		 9344 break;
9345 default:
8478eaa1 9346 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) {
e59d27e0
TM		 9347 rpc_restart_call_prepare(task);
9348 return;
9349 }
9350 }
863a3c6c
AA		 9351}
9352
9353static void nfs4_layoutcommit_release(void *calldata)
9354{
9355 struct nfs4_layoutcommit_data *data = calldata;
9356
db29c089 9357 pnfs_cleanup_layoutcommit(data);
d8c951c3
TM		 9358 nfs_post_op_update_inode_force_wcc(data->args.inode,
9359 data->res.fattr);
a52458b4 9360 put_cred(data->cred);
472e2594 9361 nfs_iput_and_deactive(data->inode);
863a3c6c
AA		 9362 kfree(data);
9363}
9364
9365static const struct rpc_call_ops nfs4_layoutcommit_ops = {
9366 .rpc_call_prepare = nfs4_layoutcommit_prepare,
9367 .rpc_call_done = nfs4_layoutcommit_done,
9368 .rpc_release = nfs4_layoutcommit_release,
9369};
9370
9371int
ef311537 9372nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 9373{
9374 struct rpc_message msg = {
9375 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
9376 .rpc_argp = &data->args,
9377 .rpc_resp = &data->res,
9378 .rpc_cred = data->cred,
9379 };
9380 struct rpc_task_setup task_setup_data = {
9381 .task = &data->task,
9382 .rpc_client = NFS_CLIENT(data->args.inode),
9383 .rpc_message = &msg,
9384 .callback_ops = &nfs4_layoutcommit_ops,
9385 .callback_data = data,
863a3c6c
AA		 9386 };
9387 struct rpc_task *task;
9388 int status = 0;
9389
b4839ebe
KM		 9390 dprintk("NFS: initiating layoutcommit call. sync %d "
9391 "lbw: %llu inode %lu\n", sync,
863a3c6c
AA		 9392 data->args.lastbytewritten,
9393 data->args.inode->i_ino);
9394
472e2594
TM		 9395 if (!sync) {
9396 data->inode = nfs_igrab_and_active(data->args.inode);
9397 if (data->inode == NULL) {
9398 nfs4_layoutcommit_release(data);
9399 return -EAGAIN;
9400 }
9401 task_setup_data.flags = RPC_TASK_ASYNC;
9402 }
fba83f34 9403 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 0);
863a3c6c
AA		 9404 task = rpc_run_task(&task_setup_data);
9405 if (IS_ERR(task))
9406 return PTR_ERR(task);
472e2594
TM		 9407 if (sync)
9408 status = task->tk_status;
48c9579a 9409 trace_nfs4_layoutcommit(data->args.inode, &data->args.stateid, status);
863a3c6c
AA		 9410 dprintk("%s: status %d\n", __func__, status);
9411 rpc_put_task(task);
9412 return status;
9413}
fca78d6d 9414
302fad7b 9415/*
97431204
AA		 9416 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
9417 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
9418 */
fca78d6d
BS		 9419static int
9420_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
b1b3e136
WAA		 9421 struct nfs_fsinfo *info,
9422 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
fca78d6d
BS		 9423{
9424 struct nfs41_secinfo_no_name_args args = {
9425 .style = SECINFO_STYLE_CURRENT_FH,
9426 };
9427 struct nfs4_secinfo_res res = {
9428 .flavors = flavors,
9429 };
9430 struct rpc_message msg = {
9431 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
9432 .rpc_argp = &args,
9433 .rpc_resp = &res,
9434 };
b1b3e136 9435 struct rpc_clnt *clnt = server->client;
cc15e24a
AS		 9436 struct nfs4_call_sync_data data = {
9437 .seq_server = server,
9438 .seq_args = &args.seq_args,
9439 .seq_res = &res.seq_res,
9440 };
9441 struct rpc_task_setup task_setup = {
9442 .rpc_client = server->client,
9443 .rpc_message = &msg,
9444 .callback_ops = server->nfs_client->cl_mvops->call_sync_ops,
9445 .callback_data = &data,
9446 .flags = RPC_TASK_NO_ROUND_ROBIN,
9447 };
a52458b4 9448 const struct cred *cred = NULL;
b1b3e136
WAA		 9449 int status;
9450
9451 if (use_integrity) {
9452 clnt = server->nfs_client->cl_rpcclient;
cc15e24a
AS		 9453 task_setup.rpc_client = clnt;
9454
7cb852df
WAA		 9455 cred = nfs4_get_clid_cred(server->nfs_client);
9456 msg.rpc_cred = cred;
b1b3e136
WAA		 9457 }
9458
9459 dprintk("--> %s\n", __func__);
cc15e24a
AS		 9460 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0);
9461 status = nfs4_call_sync_custom(&task_setup);
b1b3e136
WAA		 9462 dprintk("<-- %s status=%d\n", __func__, status);
9463
a52458b4 9464 put_cred(cred);
b1b3e136
WAA		 9465
9466 return status;
fca78d6d
BS		 9467}
9468
9469static int
9470nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
9471 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
9472{
0688e64b
TM		 9473 struct nfs4_exception exception = {
9474 .interruptible = true,
9475 };
fca78d6d
BS		 9476 int err;
9477 do {
b1b3e136
WAA		 9478 /* first try using integrity protection */
9479 err = -NFS4ERR_WRONGSEC;
9480
9481 /* try to use integrity protection with machine cred */
9482 if (_nfs4_is_integrity_protected(server->nfs_client))
9483 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
9484 flavors, true);
9485
9486 /*
9487 * if unable to use integrity protection, or SECINFO with
9488 * integrity protection returns NFS4ERR_WRONGSEC (which is
9489 * disallowed by spec, but exists in deployed servers) use
9490 * the current filesystem's rpc_client and the user cred.
9491 */
9492 if (err == -NFS4ERR_WRONGSEC)
9493 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
9494 flavors, false);
9495
fca78d6d
BS		 9496 switch (err) {
9497 case 0:
9498 case -NFS4ERR_WRONGSEC:
78b19bae 9499 case -ENOTSUPP:
05e9cfb4 9500 goto out;
fca78d6d
BS		 9501 default:
9502 err = nfs4_handle_exception(server, err, &exception);
9503 }
9504 } while (exception.retry);
05e9cfb4 9505out:
fca78d6d
BS		 9506 return err;
9507}
9508
9509static int
9510nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
9511 struct nfs_fsinfo *info)
9512{
9513 int err;
9514 struct page *page;
367156d9 9515 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
fca78d6d 9516 struct nfs4_secinfo_flavors *flavors;
58a8cf12
WAA		 9517 struct nfs4_secinfo4 *secinfo;
9518 int i;
fca78d6d
BS		 9519
9520 page = alloc_page(GFP_KERNEL);
9521 if (!page) {
9522 err = -ENOMEM;
9523 goto out;
9524 }
9525
9526 flavors = page_address(page);
9527 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
9528
9529 /*
9530 * Fall back on "guess and check" method if
9531 * the server doesn't support SECINFO_NO_NAME
9532 */
78b19bae 9533 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
fca78d6d
BS		 9534 err = nfs4_find_root_sec(server, fhandle, info);
9535 goto out_freepage;
9536 }
9537 if (err)
9538 goto out_freepage;
9539
58a8cf12
WAA		 9540 for (i = 0; i < flavors->num_flavors; i++) {
9541 secinfo = &flavors->flavors[i];
9542
9543 switch (secinfo->flavor) {
9544 case RPC_AUTH_NULL:
9545 case RPC_AUTH_UNIX:
9546 case RPC_AUTH_GSS:
9547 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
9548 &secinfo->flavor_info);
9549 break;
9550 default:
9551 flavor = RPC_AUTH_MAXFLAVOR;
9552 break;
9553 }
9554
4d4b69dd
WAA		 9555 if (!nfs_auth_info_match(&server->auth_info, flavor))
9556 flavor = RPC_AUTH_MAXFLAVOR;
9557
58a8cf12
WAA		 9558 if (flavor != RPC_AUTH_MAXFLAVOR) {
9559 err = nfs4_lookup_root_sec(server, fhandle,
9560 info, flavor);
9561 if (!err)
9562 break;
9563 }
9564 }
9565
9566 if (flavor == RPC_AUTH_MAXFLAVOR)
9567 err = -EPERM;
fca78d6d
BS		 9568
9569out_freepage:
9570 put_page(page);
9571 if (err == -EACCES)
9572 return -EPERM;
9573out:
9574 return err;
9575}
1cab0652 9576
ab7cb0df
TM		 9577static int _nfs41_test_stateid(struct nfs_server *server,
9578 nfs4_stateid *stateid,
a52458b4 9579 const struct cred *cred)
7d974794
BS		 9580{
9581 int status;
9582 struct nfs41_test_stateid_args args = {
1cab0652 9583 .stateid = stateid,
7d974794
BS		 9584 };
9585 struct nfs41_test_stateid_res res;
9586 struct rpc_message msg = {
9587 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
9588 .rpc_argp = &args,
9589 .rpc_resp = &res,
ab7cb0df 9590 .rpc_cred = cred,
7d974794 9591 };
3787d506
WAA		 9592 struct rpc_clnt *rpc_client = server->client;
9593
9594 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
9595 &rpc_client, &msg);
1cab0652 9596
38527b15 9597 dprintk("NFS call test_stateid %p\n", stateid);
fba83f34 9598 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1);
3787d506 9599 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8fe72bac 9600 &args.seq_args, &res.seq_res);
38527b15
CL		 9601 if (status != NFS_OK) {
9602 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 9603 return status;
38527b15
CL		 9604 }
9605 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 9606 return -res.status;
7d974794
BS		 9607}
9608
43912bbb
TM		 9609static void nfs4_handle_delay_or_session_error(struct nfs_server *server,
9610 int err, struct nfs4_exception *exception)
9611{
9612 exception->retry = 0;
9613 switch(err) {
9614 case -NFS4ERR_DELAY:
76e8a1bd 9615 case -NFS4ERR_RETRY_UNCACHED_REP:
43912bbb
TM		 9616 nfs4_handle_exception(server, err, exception);
9617 break;
9618 case -NFS4ERR_BADSESSION:
9619 case -NFS4ERR_BADSLOT:
9620 case -NFS4ERR_BAD_HIGH_SLOT:
9621 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
9622 case -NFS4ERR_DEADSESSION:
9623 nfs4_do_handle_exception(server, err, exception);
9624 }
9625}
9626
38527b15
CL		 9627/**
9628 * nfs41_test_stateid - perform a TEST_STATEID operation
9629 *
9630 * @server: server / transport on which to perform the operation
9631 * @stateid: state ID to test
ab7cb0df 9632 * @cred: credential
38527b15
CL		 9633 *
9634 * Returns NFS_OK if the server recognizes that "stateid" is valid.
9635 * Otherwise a negative NFS4ERR value is returned if the operation
9636 * failed or the state ID is not currently valid.
9637 */
ab7cb0df
TM		 9638static int nfs41_test_stateid(struct nfs_server *server,
9639 nfs4_stateid *stateid,
a52458b4 9640 const struct cred *cred)
7d974794 9641{
0688e64b
TM		 9642 struct nfs4_exception exception = {
9643 .interruptible = true,
9644 };
7d974794
BS		 9645 int err;
9646 do {
ab7cb0df 9647 err = _nfs41_test_stateid(server, stateid, cred);
43912bbb 9648 nfs4_handle_delay_or_session_error(server, err, &exception);
7d974794
BS		 9649 } while (exception.retry);
9650 return err;
9651}
9aeda35f 9652
7c1d5fae
TM		 9653struct nfs_free_stateid_data {
9654 struct nfs_server *server;
9655 struct nfs41_free_stateid_args args;
9aeda35f 9656 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 9657};
9658
9659static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
9660{
9661 struct nfs_free_stateid_data *data = calldata;
7981c8a6 9662 nfs4_setup_sequence(data->server->nfs_client,
7c1d5fae
TM		 9663 &data->args.seq_args,
9664 &data->res.seq_res,
9665 task);
9666}
9667
9668static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
9669{
9670 struct nfs_free_stateid_data *data = calldata;
9671
9672 nfs41_sequence_done(task, &data->res.seq_res);
9673
9674 switch (task->tk_status) {
9675 case -NFS4ERR_DELAY:
8478eaa1 9676 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN)
7c1d5fae
TM		 9677 rpc_restart_call_prepare(task);
9678 }
9679}
9680
9681static void nfs41_free_stateid_release(void *calldata)
9682{
9683 kfree(calldata);
9684}
9685
17f26b12 9686static const struct rpc_call_ops nfs41_free_stateid_ops = {
7c1d5fae
TM		 9687 .rpc_call_prepare = nfs41_free_stateid_prepare,
9688 .rpc_call_done = nfs41_free_stateid_done,
9689 .rpc_release = nfs41_free_stateid_release,
9690};
9691
2f261020
AS		 9692/**
9693 * nfs41_free_stateid - perform a FREE_STATEID operation
9694 *
9695 * @server: server / transport on which to perform the operation
9696 * @stateid: state ID to release
9697 * @cred: credential
302fad7b 9698 * @privileged: set to true if this call needs to be privileged
2f261020
AS		 9699 *
9700 * Note: this function is always asynchronous.
9701 */
9702static int nfs41_free_stateid(struct nfs_server *server,
f0b0bf88 9703 const nfs4_stateid *stateid,
a52458b4 9704 const struct cred *cred,
7c1d5fae
TM		 9705 bool privileged)
9706{
9aeda35f
BS		 9707 struct rpc_message msg = {
9708 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 9709 .rpc_cred = cred,
9aeda35f 9710 };
7c1d5fae
TM		 9711 struct rpc_task_setup task_setup = {
9712 .rpc_client = server->client,
9713 .rpc_message = &msg,
9714 .callback_ops = &nfs41_free_stateid_ops,
9715 .flags = RPC_TASK_ASYNC,
9716 };
9717 struct nfs_free_stateid_data *data;
2f261020 9718 struct rpc_task *task;
9aeda35f 9719
3787d506
WAA		 9720 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
9721 &task_setup.rpc_client, &msg);
9722
38527b15 9723 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 9724 data = kmalloc(sizeof(*data), GFP_NOFS);
9725 if (!data)
2f261020 9726 return -ENOMEM;
7c1d5fae
TM		 9727 data->server = server;
9728 nfs4_stateid_copy(&data->args.stateid, stateid);
9729
9730 task_setup.callback_data = data;
9731
9732 msg.rpc_argp = &data->args;
9733 msg.rpc_resp = &data->res;
fba83f34 9734 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, privileged);
2f261020 9735 task = rpc_run_task(&task_setup);
7c1d5fae
TM		 9736 if (IS_ERR(task))
9737 return PTR_ERR(task);
7c1d5fae 9738 rpc_put_task(task);
f0b0bf88 9739 return 0;
9aeda35f 9740}
36281caa 9741
f1cdae87
JL		 9742static void
9743nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
c8b2d0bf 9744{
a52458b4 9745 const struct cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 9746
f0b0bf88 9747 nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf 9748 nfs4_free_lock_state(server, lsp);
c8b2d0bf
TM		 9749}
9750
36281caa
TM		 9751static bool nfs41_match_stateid(const nfs4_stateid *s1,
9752 const nfs4_stateid *s2)
9753{
93b717fd
TM		 9754 if (s1->type != s2->type)
9755 return false;
9756
2d2f24ad 9757 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 9758 return false;
9759
2d2f24ad 9760 if (s1->seqid == s2->seqid)
36281caa 9761 return true;
36281caa 9762
045c5519 9763 return s1->seqid == 0 || s2->seqid == 0;
36281caa
TM		 9764}
9765
557134a3
AA		 9766#endif /* CONFIG_NFS_V4_1 */
9767
36281caa
TM		 9768static bool nfs4_match_stateid(const nfs4_stateid *s1,
9769 const nfs4_stateid *s2)
9770{
f597c537 9771 return nfs4_stateid_match(s1, s2);
36281caa
TM		 9772}
9773
9774
17280175 9775static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 9776 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 9777 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 9778 .recover_open = nfs4_open_reclaim,
9779 .recover_lock = nfs4_lock_reclaim,
591d71cb 9780 .establish_clid = nfs4_init_clientid,
05f4c350 9781 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 9782};
9783
591d71cb 9784#if defined(CONFIG_NFS_V4_1)
17280175 9785static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 9786 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
9787 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
9788 .recover_open = nfs4_open_reclaim,
9789 .recover_lock = nfs4_lock_reclaim,
4d643d1d 9790 .establish_clid = nfs41_init_clientid,
fce5c838 9791 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 9792 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 9793};
9794#endif /* CONFIG_NFS_V4_1 */
9795
17280175 9796static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 9797 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
9798 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
4dfd4f7a 9799 .recover_open = nfs40_open_expired,
591d71cb
AA		 9800 .recover_lock = nfs4_lock_expired,
9801 .establish_clid = nfs4_init_clientid,
9802};
9803
9804#if defined(CONFIG_NFS_V4_1)
17280175 9805static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 9806 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 9807 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 9808 .recover_open = nfs41_open_expired,
9809 .recover_lock = nfs41_lock_expired,
4d643d1d 9810 .establish_clid = nfs41_init_clientid,
1da177e4 9811};
591d71cb 9812#endif /* CONFIG_NFS_V4_1 */
1da177e4 9813
17280175 9814static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 9815 .sched_state_renewal = nfs4_proc_async_renew,
f15e1e8b 9816 .get_state_renewal_cred = nfs4_get_renew_cred,
8e69514f 9817 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 9818};
9819
9820#if defined(CONFIG_NFS_V4_1)
17280175 9821static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 9822 .sched_state_renewal = nfs41_proc_async_sequence,
f15e1e8b 9823 .get_state_renewal_cred = nfs4_get_machine_cred,
8e69514f 9824 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 9825};
9826#endif
9827
ec011fe8 9828static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
b03d735b 9829 .get_locations = _nfs40_proc_get_locations,
44c99933 9830 .fsid_present = _nfs40_proc_fsid_present,
ec011fe8
CL		 9831};
9832
9833#if defined(CONFIG_NFS_V4_1)
9834static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
b03d735b 9835 .get_locations = _nfs41_proc_get_locations,
44c99933 9836 .fsid_present = _nfs41_proc_fsid_present,
ec011fe8
CL		 9837};
9838#endif /* CONFIG_NFS_V4_1 */
9839
97dc1359
TM		 9840static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
9841 .minor_version = 0,
39c6daae
TM		 9842 .init_caps = NFS_CAP_READDIRPLUS
9843 | NFS_CAP_ATOMIC_OPEN
39c6daae 9844 | NFS_CAP_POSIX_LOCK,
abf79bb3
CL		 9845 .init_client = nfs40_init_client,
9846 .shutdown_client = nfs40_shutdown_client,
36281caa 9847 .match_stateid = nfs4_match_stateid,
fca78d6d 9848 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 9849 .free_lock_state = nfs4_release_lockowner,
45870d69 9850 .test_and_free_expired = nfs40_test_and_free_expired_stateid,
63f5f796 9851 .alloc_seqid = nfs_alloc_seqid,
9915ea7e 9852 .call_sync_ops = &nfs40_call_sync_ops,
c48f4f35
TM		 9853 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
9854 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
9855 .state_renewal_ops = &nfs40_state_renewal_ops,
ec011fe8 9856 .mig_recovery_ops = &nfs40_mig_recovery_ops,
97dc1359
TM		 9857};
9858
9859#if defined(CONFIG_NFS_V4_1)
63f5f796
TM		 9860static struct nfs_seqid *
9861nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2)
9862{
9863 return NULL;
9864}
9865
97dc1359
TM		 9866static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
9867 .minor_version = 1,
39c6daae
TM		 9868 .init_caps = NFS_CAP_READDIRPLUS
9869 | NFS_CAP_ATOMIC_OPEN
3b66486c 9870 | NFS_CAP_POSIX_LOCK
49f9a0fa 9871 | NFS_CAP_STATEID_NFSV41
6e01260c
FI		 9872 | NFS_CAP_ATOMIC_OPEN_V1
9873 | NFS_CAP_LGOPEN,
abf79bb3
CL		 9874 .init_client = nfs41_init_client,
9875 .shutdown_client = nfs41_shutdown_client,
36281caa 9876 .match_stateid = nfs41_match_stateid,
fca78d6d 9877 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 9878 .free_lock_state = nfs41_free_lock_state,
45870d69 9879 .test_and_free_expired = nfs41_test_and_free_expired_stateid,
63f5f796 9880 .alloc_seqid = nfs_alloc_no_seqid,
04fa2c6b 9881 .session_trunk = nfs4_test_session_trunk,
9915ea7e 9882 .call_sync_ops = &nfs41_call_sync_ops,
c48f4f35
TM		 9883 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
9884 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
9885 .state_renewal_ops = &nfs41_state_renewal_ops,
ec011fe8 9886 .mig_recovery_ops = &nfs41_mig_recovery_ops,
97dc1359
TM		 9887};
9888#endif
9889
42c2c424
SD		 9890#if defined(CONFIG_NFS_V4_2)
9891static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
9892 .minor_version = 2,
7017310a
BS		 9893 .init_caps = NFS_CAP_READDIRPLUS
9894 | NFS_CAP_ATOMIC_OPEN
7017310a
BS		 9895 | NFS_CAP_POSIX_LOCK
9896 | NFS_CAP_STATEID_NFSV41
e983120e 9897 | NFS_CAP_ATOMIC_OPEN_V1
6e01260c 9898 | NFS_CAP_LGOPEN
f4ac1674 9899 | NFS_CAP_ALLOCATE
2e72448b 9900 | NFS_CAP_COPY
cb95deea 9901 | NFS_CAP_OFFLOAD_CANCEL
0491567b 9902 | NFS_CAP_COPY_NOTIFY
624bd5b7 9903 | NFS_CAP_DEALLOCATE
6c5a0d89 9904 | NFS_CAP_SEEK
e5341f3a 9905 | NFS_CAP_LAYOUTSTATS
3eb86093
TM		 9906 | NFS_CAP_CLONE
9907 | NFS_CAP_LAYOUTERROR,
abf79bb3
CL		 9908 .init_client = nfs41_init_client,
9909 .shutdown_client = nfs41_shutdown_client,
42c2c424
SD		 9910 .match_stateid = nfs41_match_stateid,
9911 .find_root_sec = nfs41_find_root_sec,
7017310a 9912 .free_lock_state = nfs41_free_lock_state,
9915ea7e 9913 .call_sync_ops = &nfs41_call_sync_ops,
45870d69 9914 .test_and_free_expired = nfs41_test_and_free_expired_stateid,
63f5f796 9915 .alloc_seqid = nfs_alloc_no_seqid,
04fa2c6b 9916 .session_trunk = nfs4_test_session_trunk,
42c2c424
SD		 9917 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
9918 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
9919 .state_renewal_ops = &nfs41_state_renewal_ops,
18e3b739 9920 .mig_recovery_ops = &nfs41_mig_recovery_ops,
42c2c424
SD		 9921};
9922#endif
9923
97dc1359
TM		 9924const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
9925 [0] = &nfs_v4_0_minor_ops,
9926#if defined(CONFIG_NFS_V4_1)
9927 [1] = &nfs_v4_1_minor_ops,
9928#endif
42c2c424
SD		 9929#if defined(CONFIG_NFS_V4_2)
9930 [2] = &nfs_v4_2_minor_ops,
9931#endif
97dc1359
TM		 9932};
9933
13997823 9934static ssize_t nfs4_listxattr(struct dentry *dentry, char *list, size_t size)
c4803c49
AG		 9935{
9936 ssize_t error, error2;
9937
9938 error = generic_listxattr(dentry, list, size);
9939 if (error < 0)
9940 return error;
9941 if (list) {
9942 list += error;
9943 size -= error;
9944 }
9945
9946 error2 = nfs4_listxattr_nfs4_label(d_inode(dentry), list, size);
9947 if (error2 < 0)
9948 return error2;
9949 return error + error2;
9950}
9951
17f26b12 9952static const struct inode_operations nfs4_dir_inode_operations = {
73a79706
BS		 9953 .create = nfs_create,
9954 .lookup = nfs_lookup,
9955 .atomic_open = nfs_atomic_open,
9956 .link = nfs_link,
9957 .unlink = nfs_unlink,
9958 .symlink = nfs_symlink,
9959 .mkdir = nfs_mkdir,
9960 .rmdir = nfs_rmdir,
9961 .mknod = nfs_mknod,
9962 .rename = nfs_rename,
9963 .permission = nfs_permission,
9964 .getattr = nfs_getattr,
9965 .setattr = nfs_setattr,
c4803c49 9966 .listxattr = nfs4_listxattr,
73a79706
BS		 9967};
9968
92e1d5be 9969static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 9970 .permission = nfs_permission,
9971 .getattr = nfs_getattr,
9972 .setattr = nfs_setattr,
c4803c49 9973 .listxattr = nfs4_listxattr,
6b3b5496
BF		 9974};
9975
509de811 9976const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 9977 .version = 4, /* protocol version */
9978 .dentry_ops = &nfs4_dentry_operations,
9979 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 9980 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 9981 .file_ops = &nfs4_file_operations,
1da177e4 9982 .getroot = nfs4_proc_get_root,
281cad46 9983 .submount = nfs4_submount,
ff9099f2 9984 .try_mount = nfs4_try_mount,
1da177e4
LT		 9985 .getattr = nfs4_proc_getattr,
9986 .setattr = nfs4_proc_setattr,
9987 .lookup = nfs4_proc_lookup,
5b5faaf6 9988 .lookupp = nfs4_proc_lookupp,
1da177e4
LT		 9989 .access = nfs4_proc_access,
9990 .readlink = nfs4_proc_readlink,
1da177e4
LT		 9991 .create = nfs4_proc_create,
9992 .remove = nfs4_proc_remove,
9993 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 9994 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4 9995 .unlink_done = nfs4_proc_unlink_done,
d3d4152a 9996 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 9997 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 9998 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 9999 .link = nfs4_proc_link,
10000 .symlink = nfs4_proc_symlink,
10001 .mkdir = nfs4_proc_mkdir,
912678db 10002 .rmdir = nfs4_proc_rmdir,
1da177e4
LT		 10003 .readdir = nfs4_proc_readdir,
10004 .mknod = nfs4_proc_mknod,
10005 .statfs = nfs4_proc_statfs,
10006 .fsinfo = nfs4_proc_fsinfo,
10007 .pathconf = nfs4_proc_pathconf,
e9326dca 10008 .set_capabilities = nfs4_server_capabilities,
1da177e4 10009 .decode_dirent = nfs4_decode_dirent,
a4cdda59 10010 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
1da177e4 10011 .read_setup = nfs4_proc_read_setup,
ec06c096 10012 .read_done = nfs4_read_done,
1da177e4 10013 .write_setup = nfs4_proc_write_setup,
788e7a89 10014 .write_done = nfs4_write_done,
1da177e4 10015 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 10016 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 10017 .commit_done = nfs4_commit_done,
1da177e4 10018 .lock = nfs4_proc_lock,
e50a1c2e 10019 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 10020 .close_context = nfs4_close_context,
2b484297 10021 .open_context = nfs4_atomic_open,
011e2a7f 10022 .have_delegation = nfs4_have_delegation,
6663ee7f 10023 .alloc_client = nfs4_alloc_client,
45a52a02 10024 .init_client = nfs4_init_client,
cdb7eced 10025 .free_client = nfs4_free_client,
1179acc6
BS		 10026 .create_server = nfs4_create_server,
10027 .clone_server = nfs_clone_server,
1da177e4
LT		 10028};
10029
64c2ce8b 10030static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
98e9cb57 10031 .name = XATTR_NAME_NFSV4_ACL,
64c2ce8b
AK		 10032 .list = nfs4_xattr_list_nfs4_acl,
10033 .get = nfs4_xattr_get_nfs4_acl,
10034 .set = nfs4_xattr_set_nfs4_acl,
10035};
10036
10037const struct xattr_handler *nfs4_xattr_handlers[] = {
10038 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 10039#ifdef CONFIG_NFS_V4_SECURITY_LABEL
10040 &nfs4_xattr_nfs4_label_handler,
10041#endif
64c2ce8b
AK		 10042 NULL
10043};
10044
1da177e4
LT		 10045/*
10046 * Local variables:
10047 * c-basic-offset: 8
10048 * End:
10049 */
Linux 6.x block layer and io_uring tree(s)