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Linux 5.11-rc2
[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"
39d43d16 66#include "sysfs.h"
40c64c26 67#include "nfs4idmap.h"
73e39aaa 68#include "nfs4session.h"
de242c0b 69#include "fscache.h"
012a211a 70#include "nfs42.h"
1da177e4 71
c6d01c6f
TM		 72#include "nfs4trace.h"
73
c5675526
AS		 74#ifdef CONFIG_NFS_V4_2
75#include "nfs42.h"
76#endif /* CONFIG_NFS_V4_2 */
77
1da177e4
LT		 78#define NFSDBG_FACILITY NFSDBG_PROC
79
30846df0
TM		 80#define NFS4_BITMASK_SZ 3
81
2066fe89 82#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 83#define NFS4_POLL_RETRY_MAX (15*HZ)
84
a1d1c4f1
TM		 85/* file attributes which can be mapped to nfs attributes */
86#define NFS4_VALID_ATTRS (ATTR_MODE \
87 | ATTR_UID \
88 | ATTR_GID \
89 | ATTR_SIZE \
90 | ATTR_ATIME \
91 | ATTR_MTIME \
92 | ATTR_CTIME \
93 | ATTR_ATIME_SET \
94 | ATTR_MTIME_SET)
95
cdd4e68b 96struct nfs4_opendata;
b257957e 97static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 98static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
81934ddb 99static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
a841b54d 100static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label, struct inode *inode);
a52458b4 101static int nfs4_do_setattr(struct inode *inode, const struct cred *cred,
0ab64e0e 102 struct nfs_fattr *fattr, struct iattr *sattr,
29b59f94 103 struct nfs_open_context *ctx, struct nfs4_label *ilabel,
1775fd3e 104 struct nfs4_label *olabel);
f062eb6c 105#ifdef CONFIG_NFS_V4_1
3be0f80b 106static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
a52458b4 107 const struct cred *cred,
3be0f80b
TM		 108 struct nfs4_slot *slot,
109 bool is_privileged);
ab7cb0df 110static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *,
a52458b4 111 const struct cred *);
f0b0bf88 112static int nfs41_free_stateid(struct nfs_server *, const nfs4_stateid *,
a52458b4 113 const struct cred *, bool);
f062eb6c 114#endif
76bd5c01
OK		 115static void nfs4_bitmask_adjust(__u32 *bitmask, struct inode *inode,
116 struct nfs_server *server,
117 struct nfs4_label *label);
aa9c2669
DQ		 118
119#ifdef CONFIG_NFS_V4_SECURITY_LABEL
120static inline struct nfs4_label *
121nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
122 struct iattr *sattr, struct nfs4_label *label)
123{
124 int err;
125
126 if (label == NULL)
127 return NULL;
128
129 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0)
130 return NULL;
131
aa9c2669
DQ		 132 err = security_dentry_init_security(dentry, sattr->ia_mode,
133 &dentry->d_name, (void **)&label->label, &label->len);
134 if (err == 0)
135 return label;
136
137 return NULL;
138}
139static inline void
140nfs4_label_release_security(struct nfs4_label *label)
141{
142 if (label)
143 security_release_secctx(label->label, label->len);
144}
145static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
146{
147 if (label)
148 return server->attr_bitmask;
149
150 return server->attr_bitmask_nl;
151}
152#else
153static inline struct nfs4_label *
154nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
155 struct iattr *sattr, struct nfs4_label *l)
156{ return NULL; }
157static inline void
158nfs4_label_release_security(struct nfs4_label *label)
159{ return; }
160static inline u32 *
161nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
162{ return server->attr_bitmask; }
163#endif
164
1da177e4 165/* Prevent leaks of NFSv4 errors into userland */
46f72f57 166static int nfs4_map_errors(int err)
1da177e4 167{
52567b03
TM		 168 if (err >= -1000)
169 return err;
170 switch (err) {
171 case -NFS4ERR_RESOURCE:
30005121
WAA		 172 case -NFS4ERR_LAYOUTTRYLATER:
173 case -NFS4ERR_RECALLCONFLICT:
52567b03 174 return -EREMOTEIO;
7ebb9315 175 case -NFS4ERR_WRONGSEC:
8897538e 176 case -NFS4ERR_WRONG_CRED:
7ebb9315 177 return -EPERM;
3ddeb7c5
TM		 178 case -NFS4ERR_BADOWNER:
179 case -NFS4ERR_BADNAME:
180 return -EINVAL;
fb13bfa7
TM		 181 case -NFS4ERR_SHARE_DENIED:
182 return -EACCES;
f25efd85
SD		 183 case -NFS4ERR_MINOR_VERS_MISMATCH:
184 return -EPROTONOSUPPORT;
6e3cf241
TM		 185 case -NFS4ERR_FILE_OPEN:
186 return -EBUSY;
9fff59ed
TM		 187 case -NFS4ERR_NOT_SAME:
188 return -ENOTSYNC;
52567b03 189 default:
1da177e4 190 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 191 __func__, -err);
52567b03 192 break;
1da177e4 193 }
52567b03 194 return -EIO;
1da177e4
LT		 195}
196
197/*
198 * This is our standard bitmap for GETATTR requests.
199 */
1549210f 200const u32 nfs4_fattr_bitmap[3] = {
1da177e4
LT		 201 FATTR4_WORD0_TYPE
202 | FATTR4_WORD0_CHANGE
203 | FATTR4_WORD0_SIZE
204 | FATTR4_WORD0_FSID
205 | FATTR4_WORD0_FILEID,
206 FATTR4_WORD1_MODE
207 | FATTR4_WORD1_NUMLINKS
208 | FATTR4_WORD1_OWNER
209 | FATTR4_WORD1_OWNER_GROUP
210 | FATTR4_WORD1_RAWDEV
211 | FATTR4_WORD1_SPACE_USED
212 | FATTR4_WORD1_TIME_ACCESS
213 | FATTR4_WORD1_TIME_METADATA
ea96d1ec
AS		 214 | FATTR4_WORD1_TIME_MODIFY
215 | FATTR4_WORD1_MOUNTED_ON_FILEID,
aa9c2669
DQ		 216#ifdef CONFIG_NFS_V4_SECURITY_LABEL
217 FATTR4_WORD2_SECURITY_LABEL
218#endif
1da177e4
LT		 219};
220
1549210f
TM		 221static const u32 nfs4_pnfs_open_bitmap[3] = {
222 FATTR4_WORD0_TYPE
223 | FATTR4_WORD0_CHANGE
224 | FATTR4_WORD0_SIZE
225 | FATTR4_WORD0_FSID
226 | FATTR4_WORD0_FILEID,
227 FATTR4_WORD1_MODE
228 | FATTR4_WORD1_NUMLINKS
229 | FATTR4_WORD1_OWNER
230 | FATTR4_WORD1_OWNER_GROUP
231 | FATTR4_WORD1_RAWDEV
232 | FATTR4_WORD1_SPACE_USED
233 | FATTR4_WORD1_TIME_ACCESS
234 | FATTR4_WORD1_TIME_METADATA
235 | FATTR4_WORD1_TIME_MODIFY,
236 FATTR4_WORD2_MDSTHRESHOLD
95864c91
TM		 237#ifdef CONFIG_NFS_V4_SECURITY_LABEL
238 | FATTR4_WORD2_SECURITY_LABEL
239#endif
1549210f
TM		 240};
241
e23008ec
AA		 242static const u32 nfs4_open_noattr_bitmap[3] = {
243 FATTR4_WORD0_TYPE
e23008ec
AA		 244 | FATTR4_WORD0_FILEID,
245};
246
a09df2ca 247const u32 nfs4_statfs_bitmap[3] = {
1da177e4
LT		 248 FATTR4_WORD0_FILES_AVAIL
249 | FATTR4_WORD0_FILES_FREE
250 | FATTR4_WORD0_FILES_TOTAL,
251 FATTR4_WORD1_SPACE_AVAIL
252 | FATTR4_WORD1_SPACE_FREE
253 | FATTR4_WORD1_SPACE_TOTAL
254};
255
a09df2ca 256const u32 nfs4_pathconf_bitmap[3] = {
1da177e4
LT		 257 FATTR4_WORD0_MAXLINK
258 | FATTR4_WORD0_MAXNAME,
259 0
260};
261
dae100c2 262const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
1da177e4
LT		 263 | FATTR4_WORD0_MAXREAD
264 | FATTR4_WORD0_MAXWRITE
265 | FATTR4_WORD0_LEASE_TIME,
55b6e774 266 FATTR4_WORD1_TIME_DELTA
dae100c2
FI		 267 | FATTR4_WORD1_FS_LAYOUT_TYPES,
268 FATTR4_WORD2_LAYOUT_BLKSIZE
2a92ee92 269 | FATTR4_WORD2_CLONE_BLKSIZE
b78ef845 270 | FATTR4_WORD2_XATTR_SUPPORT
1da177e4
LT		 271};
272
a09df2ca 273const u32 nfs4_fs_locations_bitmap[3] = {
c05cefcc 274 FATTR4_WORD0_CHANGE
830b8e33
MN		 275 | FATTR4_WORD0_SIZE
276 | FATTR4_WORD0_FSID
277 | FATTR4_WORD0_FILEID
278 | FATTR4_WORD0_FS_LOCATIONS,
c05cefcc 279 FATTR4_WORD1_OWNER
830b8e33
MN		 280 | FATTR4_WORD1_OWNER_GROUP
281 | FATTR4_WORD1_RAWDEV
282 | FATTR4_WORD1_SPACE_USED
283 | FATTR4_WORD1_TIME_ACCESS
284 | FATTR4_WORD1_TIME_METADATA
285 | FATTR4_WORD1_TIME_MODIFY
a09df2ca 286 | FATTR4_WORD1_MOUNTED_ON_FILEID,
830b8e33
MN		 287};
288
30846df0
TM		 289static void nfs4_bitmap_copy_adjust(__u32 *dst, const __u32 *src,
290 struct inode *inode)
291{
292 unsigned long cache_validity;
293
294 memcpy(dst, src, NFS4_BITMASK_SZ*sizeof(*dst));
295 if (!inode || !nfs4_have_delegation(inode, FMODE_READ))
296 return;
297
298 cache_validity = READ_ONCE(NFS_I(inode)->cache_validity);
299 if (!(cache_validity & NFS_INO_REVAL_FORCED))
300 cache_validity &= ~(NFS_INO_INVALID_CHANGE
301 | NFS_INO_INVALID_SIZE);
302
303 if (!(cache_validity & NFS_INO_INVALID_SIZE))
304 dst[0] &= ~FATTR4_WORD0_SIZE;
305
306 if (!(cache_validity & NFS_INO_INVALID_CHANGE))
307 dst[0] &= ~FATTR4_WORD0_CHANGE;
308}
309
310static void nfs4_bitmap_copy_adjust_setattr(__u32 *dst,
311 const __u32 *src, struct inode *inode)
312{
313 nfs4_bitmap_copy_adjust(dst, src, inode);
314}
315
bc4785cd 316static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 317 struct nfs4_readdir_arg *readdir)
318{
18fe6a23 319 unsigned int attrs = FATTR4_WORD0_FILEID | FATTR4_WORD0_TYPE;
0dbb4c67 320 __be32 *start, *p;
1da177e4 321
1da177e4 322 if (cookie > 2) {
b7ef1956 323 readdir->cookie = cookie;
1da177e4
LT		 324 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
325 return;
326 }
327
328 readdir->cookie = 0;
329 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
330 if (cookie == 2)
331 return;
332
333 /*
334 * NFSv4 servers do not return entries for '.' and '..'
335 * Therefore, we fake these entries here. We let '.'
336 * have cookie 0 and '..' have cookie 1. Note that
337 * when talking to the server, we always send cookie 0
338 * instead of 1 or 2.
339 */
2b86ce2d 340 start = p = kmap_atomic(*readdir->pages);
1da177e4
LT		 341
342 if (cookie == 0) {
343 *p++ = xdr_one; /* next */
344 *p++ = xdr_zero; /* cookie, first word */
345 *p++ = xdr_one; /* cookie, second word */
346 *p++ = xdr_one; /* entry len */
347 memcpy(p, ".\0\0\0", 4); /* entry */
348 p++;
349 *p++ = xdr_one; /* bitmap length */
18fe6a23
AS		 350 *p++ = htonl(attrs); /* bitmap */
351 *p++ = htonl(12); /* attribute buffer length */
352 *p++ = htonl(NF4DIR);
2b0143b5 353 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry)));
1da177e4
LT		 354 }
355
356 *p++ = xdr_one; /* next */
357 *p++ = xdr_zero; /* cookie, first word */
358 *p++ = xdr_two; /* cookie, second word */
359 *p++ = xdr_two; /* entry len */
360 memcpy(p, "..\0\0", 4); /* entry */
361 p++;
362 *p++ = xdr_one; /* bitmap length */
18fe6a23
AS		 363 *p++ = htonl(attrs); /* bitmap */
364 *p++ = htonl(12); /* attribute buffer length */
365 *p++ = htonl(NF4DIR);
2b0143b5 366 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry->d_parent)));
1da177e4
LT		 367
368 readdir->pgbase = (char *)p - (char *)start;
369 readdir->count -= readdir->pgbase;
2b86ce2d 370 kunmap_atomic(start);
1da177e4
LT		 371}
372
26d36301
TM		 373static void nfs4_test_and_free_stateid(struct nfs_server *server,
374 nfs4_stateid *stateid,
a52458b4 375 const struct cred *cred)
26d36301
TM		 376{
377 const struct nfs4_minor_version_ops *ops = server->nfs_client->cl_mvops;
378
379 ops->test_and_free_expired(server, stateid, cred);
380}
381
382static void __nfs4_free_revoked_stateid(struct nfs_server *server,
383 nfs4_stateid *stateid,
a52458b4 384 const struct cred *cred)
26d36301
TM		 385{
386 stateid->type = NFS4_REVOKED_STATEID_TYPE;
387 nfs4_test_and_free_stateid(server, stateid, cred);
388}
389
390static void nfs4_free_revoked_stateid(struct nfs_server *server,
391 const nfs4_stateid *stateid,
a52458b4 392 const struct cred *cred)
26d36301
TM		 393{
394 nfs4_stateid tmp;
395
396 nfs4_stateid_copy(&tmp, stateid);
397 __nfs4_free_revoked_stateid(server, &tmp, cred);
398}
399
8478eaa1
N		 400static long nfs4_update_delay(long *timeout)
401{
402 long ret;
403 if (!timeout)
404 return NFS4_POLL_RETRY_MAX;
405 if (*timeout <= 0)
406 *timeout = NFS4_POLL_RETRY_MIN;
407 if (*timeout > NFS4_POLL_RETRY_MAX)
408 *timeout = NFS4_POLL_RETRY_MAX;
409 ret = *timeout;
410 *timeout <<= 1;
411 return ret;
412}
413
0688e64b 414static int nfs4_delay_killable(long *timeout)
65de872e 415{
65de872e
TM		 416 might_sleep();
417
8478eaa1
N		 418 freezable_schedule_timeout_killable_unsafe(
419 nfs4_update_delay(timeout));
0688e64b
TM		 420 if (!__fatal_signal_pending(current))
421 return 0;
422 return -EINTR;
423}
424
425static int nfs4_delay_interruptible(long *timeout)
426{
427 might_sleep();
428
59679d99 429 freezable_schedule_timeout_interruptible_unsafe(nfs4_update_delay(timeout));
0688e64b
TM		 430 if (!signal_pending(current))
431 return 0;
432 return __fatal_signal_pending(current) ? -EINTR :-ERESTARTSYS;
433}
434
435static int nfs4_delay(long *timeout, bool interruptible)
436{
437 if (interruptible)
438 return nfs4_delay_interruptible(timeout);
439 return nfs4_delay_killable(timeout);
65de872e
TM		 440}
441
50c80007
TM		 442static const nfs4_stateid *
443nfs4_recoverable_stateid(const nfs4_stateid *stateid)
444{
445 if (!stateid)
446 return NULL;
447 switch (stateid->type) {
448 case NFS4_OPEN_STATEID_TYPE:
449 case NFS4_LOCK_STATEID_TYPE:
450 case NFS4_DELEGATION_STATEID_TYPE:
451 return stateid;
452 default:
453 break;
454 }
455 return NULL;
456}
457
65de872e
TM		 458/* This is the error handling routine for processes that are allowed
459 * to sleep.
460 */
b3c2aa07
TM		 461static int nfs4_do_handle_exception(struct nfs_server *server,
462 int errorcode, struct nfs4_exception *exception)
65de872e
TM		 463{
464 struct nfs_client *clp = server->nfs_client;
9e33bed5 465 struct nfs4_state *state = exception->state;
50c80007 466 const nfs4_stateid *stateid;
3114ea7a 467 struct inode *inode = exception->inode;
65de872e
TM		 468 int ret = errorcode;
469
b3c2aa07
TM		 470 exception->delay = 0;
471 exception->recovering = 0;
65de872e 472 exception->retry = 0;
272289a3 473
50c80007 474 stateid = nfs4_recoverable_stateid(exception->stateid);
272289a3 475 if (stateid == NULL && state != NULL)
50c80007 476 stateid = nfs4_recoverable_stateid(&state->stateid);
272289a3 477
65de872e
TM		 478 switch(errorcode) {
479 case 0:
480 return 0;
cf61eb26
TM		 481 case -NFS4ERR_BADHANDLE:
482 case -ESTALE:
483 if (inode != NULL && S_ISREG(inode->i_mode))
484 pnfs_destroy_layout(NFS_I(inode));
485 break;
5ba12443
TM		 486 case -NFS4ERR_DELEG_REVOKED:
487 case -NFS4ERR_ADMIN_REVOKED:
272289a3 488 case -NFS4ERR_EXPIRED:
5ba12443 489 case -NFS4ERR_BAD_STATEID:
fefa1a81 490 case -NFS4ERR_PARTNER_NO_AUTH:
272289a3
TM		 491 if (inode != NULL && stateid != NULL) {
492 nfs_inode_find_state_and_recover(inode,
493 stateid);
494 goto wait_on_recovery;
495 }
df561f66 496 fallthrough;
272289a3 497 case -NFS4ERR_OPENMODE:
8487c479
TM		 498 if (inode) {
499 int err;
500
501 err = nfs_async_inode_return_delegation(inode,
502 stateid);
503 if (err == 0)
504 goto wait_on_recovery;
505 if (stateid != NULL && stateid->type == NFS4_DELEGATION_STATEID_TYPE) {
506 exception->retry = 1;
507 break;
508 }
509 }
3114ea7a
TM		 510 if (state == NULL)
511 break;
5d422301
TM		 512 ret = nfs4_schedule_stateid_recovery(server, state);
513 if (ret < 0)
514 break;
3114ea7a 515 goto wait_on_recovery;
65de872e 516 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 517 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 518 nfs4_schedule_lease_recovery(clp);
519 goto wait_on_recovery;
519ae255
CL		 520 case -NFS4ERR_MOVED:
521 ret = nfs4_schedule_migration_recovery(server);
522 if (ret < 0)
523 break;
524 goto wait_on_recovery;
8ef2f8d4
CL		 525 case -NFS4ERR_LEASE_MOVED:
526 nfs4_schedule_lease_moved_recovery(clp);
527 goto wait_on_recovery;
03391693 528#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 529 case -NFS4ERR_BADSESSION:
530 case -NFS4ERR_BADSLOT:
531 case -NFS4ERR_BAD_HIGH_SLOT:
532 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
533 case -NFS4ERR_DEADSESSION:
534 case -NFS4ERR_SEQ_FALSE_RETRY:
535 case -NFS4ERR_SEQ_MISORDERED:
5c441544 536 /* Handled in nfs41_sequence_process() */
399f11c3 537 goto wait_on_recovery;
03391693 538#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 539 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 540 if (exception->timeout > HZ) {
541 /* We have retried a decent amount, time to
542 * fail
543 */
544 ret = -EBUSY;
545 break;
546 }
df561f66 547 fallthrough;
65de872e 548 case -NFS4ERR_DELAY:
2598ed34 549 nfs_inc_server_stats(server, NFSIOS_DELAY);
df561f66 550 fallthrough;
2598ed34 551 case -NFS4ERR_GRACE:
e85d7ee4 552 case -NFS4ERR_LAYOUTTRYLATER:
183d9e7b 553 case -NFS4ERR_RECALLCONFLICT:
b3c2aa07
TM		 554 exception->delay = 1;
555 return 0;
556
a8a4ae3a 557 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 558 case -NFS4ERR_OLD_STATEID:
559 exception->retry = 1;
b064eca2
TM		 560 break;
561 case -NFS4ERR_BADOWNER:
562 /* The following works around a Linux server bug! */
563 case -NFS4ERR_BADNAME:
564 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
565 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
566 exception->retry = 1;
567 printk(KERN_WARNING "NFS: v4 server %s "
568 "does not accept raw "
569 "uid/gids. "
570 "Reenabling the idmapper.\n",
571 server->nfs_client->cl_hostname);
572 }
65de872e
TM		 573 }
574 /* We failed to handle the error */
575 return nfs4_map_errors(ret);
0400a6b0 576wait_on_recovery:
b3c2aa07
TM		 577 exception->recovering = 1;
578 return 0;
579}
580
581/* This is the error handling routine for processes that are allowed
582 * to sleep.
583 */
584int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
585{
586 struct nfs_client *clp = server->nfs_client;
587 int ret;
588
589 ret = nfs4_do_handle_exception(server, errorcode, exception);
590 if (exception->delay) {
0688e64b
TM		 591 ret = nfs4_delay(&exception->timeout,
592 exception->interruptible);
b3c2aa07
TM		 593 goto out_retry;
594 }
595 if (exception->recovering) {
596 ret = nfs4_wait_clnt_recover(clp);
597 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
598 return -EIO;
599 goto out_retry;
600 }
601 return ret;
602out_retry:
a2c0b9e2
TM		 603 if (ret == 0)
604 exception->retry = 1;
605 return ret;
65de872e
TM		 606}
607
037fc980
TM		 608static int
609nfs4_async_handle_exception(struct rpc_task *task, struct nfs_server *server,
610 int errorcode, struct nfs4_exception *exception)
611{
612 struct nfs_client *clp = server->nfs_client;
613 int ret;
614
615 ret = nfs4_do_handle_exception(server, errorcode, exception);
616 if (exception->delay) {
617 rpc_delay(task, nfs4_update_delay(&exception->timeout));
618 goto out_retry;
619 }
620 if (exception->recovering) {
621 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
622 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
623 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
624 goto out_retry;
625 }
519ae255 626 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
037fc980
TM		 627 ret = -EIO;
628 return ret;
629out_retry:
0f90be13 630 if (ret == 0) {
a2c0b9e2 631 exception->retry = 1;
0f90be13
BB		 632 /*
633 * For NFS4ERR_MOVED, the client transport will need to
634 * be recomputed after migration recovery has completed.
635 */
636 if (errorcode == -NFS4ERR_MOVED)
637 rpc_task_release_transport(task);
638 }
a2c0b9e2 639 return ret;
65de872e
TM		 640}
641
0f913a57 642int
037fc980
TM		 643nfs4_async_handle_error(struct rpc_task *task, struct nfs_server *server,
644 struct nfs4_state *state, long *timeout)
645{
646 struct nfs4_exception exception = {
647 .state = state,
648 };
649
650 if (task->tk_status >= 0)
651 return 0;
652 if (timeout)
653 exception.timeout = *timeout;
654 task->tk_status = nfs4_async_handle_exception(task, server,
655 task->tk_status,
656 &exception);
657 if (exception.delay && timeout)
658 *timeout = exception.timeout;
659 if (exception.retry)
660 return -EAGAIN;
661 return 0;
662}
663
a5250def
WAA		 664/*
665 * Return 'true' if 'clp' is using an rpc_client that is integrity protected
666 * or 'false' otherwise.
667 */
668static bool _nfs4_is_integrity_protected(struct nfs_client *clp)
669{
670 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor;
eeea5361 671 return (flavor == RPC_AUTH_GSS_KRB5I) || (flavor == RPC_AUTH_GSS_KRB5P);
a5250def 672}
65de872e 673
452e9352 674static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 675{
1da177e4
LT		 676 spin_lock(&clp->cl_lock);
677 if (time_before(clp->cl_last_renewal,timestamp))
678 clp->cl_last_renewal = timestamp;
679 spin_unlock(&clp->cl_lock);
680}
681
452e9352
TM		 682static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
683{
be824167
TM		 684 struct nfs_client *clp = server->nfs_client;
685
686 if (!nfs4_has_session(clp))
687 do_renew_lease(clp, timestamp);
452e9352
TM		 688}
689
2a3eb2b9
CL		 690struct nfs4_call_sync_data {
691 const struct nfs_server *seq_server;
692 struct nfs4_sequence_args *seq_args;
693 struct nfs4_sequence_res *seq_res;
694};
695
be3a5d23 696void nfs4_init_sequence(struct nfs4_sequence_args *args,
fba83f34
AS		 697 struct nfs4_sequence_res *res, int cache_reply,
698 int privileged)
a9c92d6b
CL		 699{
700 args->sa_slot = NULL;
701 args->sa_cache_this = cache_reply;
fba83f34 702 args->sa_privileged = privileged;
a9c92d6b
CL		 703
704 res->sr_slot = NULL;
705}
706
2e80dbe7 707static void nfs40_sequence_free_slot(struct nfs4_sequence_res *res)
3bd2384a
CL		 708{
709 struct nfs4_slot *slot = res->sr_slot;
710 struct nfs4_slot_table *tbl;
711
3bd2384a
CL		 712 tbl = slot->table;
713 spin_lock(&tbl->slot_tbl_lock);
714 if (!nfs41_wake_and_assign_slot(tbl, slot))
715 nfs4_free_slot(tbl, slot);
716 spin_unlock(&tbl->slot_tbl_lock);
717
718 res->sr_slot = NULL;
2e80dbe7
TM		 719}
720
721static int nfs40_sequence_done(struct rpc_task *task,
722 struct nfs4_sequence_res *res)
723{
724 if (res->sr_slot != NULL)
725 nfs40_sequence_free_slot(res);
3bd2384a
CL		 726 return 1;
727}
728
cccef3b9
AA		 729#if defined(CONFIG_NFS_V4_1)
730
3be0f80b 731static void nfs41_release_slot(struct nfs4_slot *slot)
13615871 732{
e3725ec0 733 struct nfs4_session *session;
13615871 734 struct nfs4_slot_table *tbl;
c10e4498 735 bool send_new_highest_used_slotid = false;
13615871 736
3be0f80b
TM		 737 if (!slot)
738 return;
a13ce7c6 739 tbl = slot->table;
e3725ec0 740 session = tbl->session;
ea028ac9 741
07e8dcbd
TM		 742 /* Bump the slot sequence number */
743 if (slot->seq_done)
744 slot->seq_nr++;
745 slot->seq_done = 0;
746
35dc1d74 747 spin_lock(&tbl->slot_tbl_lock);
c10e4498
TM		 748 /* Be nice to the server: try to ensure that the last transmitted
749 * value for highest_user_slotid <= target_highest_slotid
750 */
751 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
752 send_new_highest_used_slotid = true;
753
a13ce7c6 754 if (nfs41_wake_and_assign_slot(tbl, slot)) {
b75ad4cd
TM		 755 send_new_highest_used_slotid = false;
756 goto out_unlock;
757 }
a13ce7c6 758 nfs4_free_slot(tbl, slot);
c10e4498
TM		 759
760 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
761 send_new_highest_used_slotid = false;
b75ad4cd 762out_unlock:
35dc1d74 763 spin_unlock(&tbl->slot_tbl_lock);
c10e4498 764 if (send_new_highest_used_slotid)
3f10a6af 765 nfs41_notify_server(session->clp);
045d2a6d
TM		 766 if (waitqueue_active(&tbl->slot_waitq))
767 wake_up_all(&tbl->slot_waitq);
13615871
AA		 768}
769
3be0f80b
TM		 770static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
771{
772 nfs41_release_slot(res->sr_slot);
773 res->sr_slot = NULL;
774}
775
3453d570
TM		 776static void nfs4_slot_sequence_record_sent(struct nfs4_slot *slot,
777 u32 seqnr)
778{
779 if ((s32)(seqnr - slot->seq_nr_highest_sent) > 0)
780 slot->seq_nr_highest_sent = seqnr;
781}
782static void nfs4_slot_sequence_acked(struct nfs4_slot *slot,
783 u32 seqnr)
784{
785 slot->seq_nr_highest_sent = seqnr;
786 slot->seq_nr_last_acked = seqnr;
787}
788
913fadc5
AS		 789static void nfs4_probe_sequence(struct nfs_client *client, const struct cred *cred,
790 struct nfs4_slot *slot)
791{
792 struct rpc_task *task = _nfs41_proc_sequence(client, cred, slot, true);
793 if (!IS_ERR(task))
794 rpc_put_task_async(task);
795}
796
2e80dbe7
TM		 797static int nfs41_sequence_process(struct rpc_task *task,
798 struct nfs4_sequence_res *res)
b0df806c 799{
e3725ec0 800 struct nfs4_session *session;
a13ce7c6 801 struct nfs4_slot *slot = res->sr_slot;
14516c3a 802 struct nfs_client *clp;
5c441544 803 int status;
85563073 804 int ret = 1;
b0df806c 805
a13ce7c6
TM		 806 if (slot == NULL)
807 goto out_noaction;
468f8613 808 /* don't increment the sequence number if the task wasn't sent */
c71c46f0 809 if (!RPC_WAS_SENT(task) || slot->seq_done)
b0df806c
AA		 810 goto out;
811
e3725ec0 812 session = slot->table->session;
913fadc5 813 clp = session->clp;
933602e3 814
2f92ae34 815 trace_nfs4_sequence_done(session, res);
5c441544
TM		 816
817 status = res->sr_status;
818 if (task->tk_status == -NFS4ERR_DEADSESSION)
819 status = -NFS4ERR_DEADSESSION;
820
691daf3b 821 /* Check the SEQUENCE operation status */
5c441544 822 switch (status) {
14516c3a 823 case 0:
3453d570
TM		 824 /* Mark this sequence number as having been acked */
825 nfs4_slot_sequence_acked(slot, slot->seq_nr);
b0df806c 826 /* Update the slot's sequence and clientid lease timer */
07e8dcbd 827 slot->seq_done = 1;
8e63b6a8 828 do_renew_lease(clp, res->sr_timestamp);
0629e370 829 /* Check sequence flags */
0a014a44
TM		 830 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags,
831 !!slot->privileged);
464ee9f9 832 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a 833 break;
ac20d163
TM		 834 case 1:
835 /*
836 * sr_status remains 1 if an RPC level error occurred.
837 * The server may or may not have processed the sequence
838 * operation..
ac20d163 839 */
3453d570
TM		 840 nfs4_slot_sequence_record_sent(slot, slot->seq_nr);
841 slot->seq_done = 1;
ac20d163 842 goto out;
14516c3a
TM		 843 case -NFS4ERR_DELAY:
844 /* The server detected a resend of the RPC call and
845 * returned NFS4ERR_DELAY as per Section 2.10.6.2
846 * of RFC5661.
847 */
df2fabff 848 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 849 __func__,
df2fabff 850 slot->slot_nr,
933602e3 851 slot->seq_nr);
3453d570 852 nfs4_slot_sequence_acked(slot, slot->seq_nr);
14516c3a 853 goto out_retry;
f9312a54
TM		 854 case -NFS4ERR_RETRY_UNCACHED_REP:
855 case -NFS4ERR_SEQ_FALSE_RETRY:
856 /*
857 * The server thinks we tried to replay a request.
858 * Retry the call after bumping the sequence ID.
859 */
3453d570 860 nfs4_slot_sequence_acked(slot, slot->seq_nr);
f9312a54 861 goto retry_new_seq;
85563073
TM		 862 case -NFS4ERR_BADSLOT:
863 /*
864 * The slot id we used was probably retired. Try again
865 * using a different slot id.
866 */
99589100 867 if (slot->slot_nr < slot->table->target_highest_slotid)
3be0f80b 868 goto session_recover;
e8794440
TM		 869 goto retry_nowait;
870 case -NFS4ERR_SEQ_MISORDERED:
3453d570 871 nfs4_slot_sequence_record_sent(slot, slot->seq_nr);
ac20d163 872 /*
3453d570
TM		 873 * Were one or more calls using this slot interrupted?
874 * If the server never received the request, then our
913fadc5
AS		 875 * transmitted slot sequence number may be too high. However,
876 * if the server did receive the request then it might
877 * accidentally give us a reply with a mismatched operation.
878 * We can sort this out by sending a lone sequence operation
879 * to the server on the same slot.
e8794440 880 */
3453d570
TM		 881 if ((s32)(slot->seq_nr - slot->seq_nr_last_acked) > 1) {
882 slot->seq_nr--;
913fadc5
AS		 883 if (task->tk_msg.rpc_proc != &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE]) {
884 nfs4_probe_sequence(clp, task->tk_msg.rpc_cred, slot);
885 res->sr_slot = NULL;
886 }
8e63b6a8
TM		 887 goto retry_nowait;
888 }
3453d570
TM		 889 /*
890 * RFC5661:
891 * A retry might be sent while the original request is
892 * still in progress on the replier. The replier SHOULD
893 * deal with the issue by returning NFS4ERR_DELAY as the
894 * reply to SEQUENCE or CB_SEQUENCE operation, but
895 * implementations MAY return NFS4ERR_SEQ_MISORDERED.
896 *
897 * Restart the search after a delay.
898 */
899 slot->seq_nr = slot->seq_nr_highest_sent;
900 goto out_retry;
5c441544
TM		 901 case -NFS4ERR_BADSESSION:
902 case -NFS4ERR_DEADSESSION:
903 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
904 goto session_recover;
14516c3a
TM		 905 default:
906 /* Just update the slot sequence no. */
07e8dcbd 907 slot->seq_done = 1;
b0df806c
AA		 908 }
909out:
910 /* The session may be reset by one of the error handlers. */
911 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
a13ce7c6 912out_noaction:
85563073 913 return ret;
3be0f80b 914session_recover:
5c441544
TM		 915 nfs4_schedule_session_recovery(session, status);
916 dprintk("%s ERROR: %d Reset session\n", __func__, status);
917 nfs41_sequence_free_slot(res);
918 goto out;
3be0f80b
TM		 919retry_new_seq:
920 ++slot->seq_nr;
e8794440
TM		 921retry_nowait:
922 if (rpc_restart_call_prepare(task)) {
2e80dbe7 923 nfs41_sequence_free_slot(res);
e8794440
TM		 924 task->tk_status = 0;
925 ret = 0;
926 }
927 goto out;
14516c3a 928out_retry:
d05dd4e9 929 if (!rpc_restart_call(task))
14516c3a
TM		 930 goto out;
931 rpc_delay(task, NFS4_POLL_RETRY_MAX);
932 return 0;
b0df806c 933}
2e80dbe7
TM		 934
935int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
936{
937 if (!nfs41_sequence_process(task, res))
938 return 0;
939 if (res->sr_slot != NULL)
940 nfs41_sequence_free_slot(res);
941 return 1;
942
943}
f9c96fcc 944EXPORT_SYMBOL_GPL(nfs41_sequence_done);
b0df806c 945
2e80dbe7
TM		 946static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res)
947{
948 if (res->sr_slot == NULL)
949 return 1;
950 if (res->sr_slot->table->session != NULL)
951 return nfs41_sequence_process(task, res);
952 return nfs40_sequence_done(task, res);
953}
954
955static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res)
956{
957 if (res->sr_slot != NULL) {
958 if (res->sr_slot->table->session != NULL)
959 nfs41_sequence_free_slot(res);
960 else
961 nfs40_sequence_free_slot(res);
962 }
963}
964
2c4b131d 965int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
df896455 966{
e3725ec0 967 if (res->sr_slot == NULL)
14516c3a 968 return 1;
3bd2384a
CL		 969 if (!res->sr_slot->table->session)
970 return nfs40_sequence_done(task, res);
14516c3a 971 return nfs41_sequence_done(task, res);
df896455 972}
2c4b131d 973EXPORT_SYMBOL_GPL(nfs4_sequence_done);
df896455 974
ce5039c1
AA		 975static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
976{
2a3eb2b9 977 struct nfs4_call_sync_data *data = calldata;
ce5039c1 978
035168ab
TM		 979 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
980
7981c8a6
AS		 981 nfs4_setup_sequence(data->seq_server->nfs_client,
982 data->seq_args, data->seq_res, task);
ce5039c1
AA		 983}
984
69ab40c4
AA		 985static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
986{
2a3eb2b9 987 struct nfs4_call_sync_data *data = calldata;
69ab40c4 988
14516c3a 989 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 990}
991
17280175 992static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 993 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 994 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 995};
996
3bd2384a
CL		 997#else /* !CONFIG_NFS_V4_1 */
998
2e80dbe7
TM		 999static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res)
1000{
1001 return nfs40_sequence_done(task, res);
1002}
1003
1004static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res)
1005{
1006 if (res->sr_slot != NULL)
1007 nfs40_sequence_free_slot(res);
1008}
1009
2c4b131d
PT		 1010int nfs4_sequence_done(struct rpc_task *task,
1011 struct nfs4_sequence_res *res)
9915ea7e 1012{
3bd2384a 1013 return nfs40_sequence_done(task, res);
9915ea7e 1014}
2c4b131d 1015EXPORT_SYMBOL_GPL(nfs4_sequence_done);
3bd2384a
CL		 1016
1017#endif /* !CONFIG_NFS_V4_1 */
9915ea7e 1018
c1dffe0b
TM		 1019static void nfs41_sequence_res_init(struct nfs4_sequence_res *res)
1020{
1021 res->sr_timestamp = jiffies;
1022 res->sr_status_flags = 0;
1023 res->sr_status = 1;
1024}
1025
3be0f80b
TM		 1026static
1027void nfs4_sequence_attach_slot(struct nfs4_sequence_args *args,
1028 struct nfs4_sequence_res *res,
1029 struct nfs4_slot *slot)
1030{
1031 if (!slot)
1032 return;
1033 slot->privileged = args->sa_privileged ? 1 : 0;
1034 args->sa_slot = slot;
1035
1036 res->sr_slot = slot;
3be0f80b
TM		 1037}
1038
1039int nfs4_setup_sequence(struct nfs_client *client,
7981c8a6
AS		 1040 struct nfs4_sequence_args *args,
1041 struct nfs4_sequence_res *res,
1042 struct rpc_task *task)
1043{
7981c8a6 1044 struct nfs4_session *session = nfs4_get_session(client);
76ee0354 1045 struct nfs4_slot_table *tbl = client->cl_slot_tbl;
3d35808b 1046 struct nfs4_slot *slot;
7981c8a6 1047
9dd9107f
AS		 1048 /* slot already allocated? */
1049 if (res->sr_slot != NULL)
1050 goto out_start;
1051
6b2e6856 1052 if (session)
76ee0354 1053 tbl = &session->fc_slot_table;
76ee0354 1054
3453d570
TM		 1055 spin_lock(&tbl->slot_tbl_lock);
1056 /* The state manager will wait until the slot table is empty */
1057 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
1058 goto out_sleep;
1059
1060 slot = nfs4_alloc_slot(tbl);
1061 if (IS_ERR(slot)) {
3453d570 1062 if (slot == ERR_PTR(-ENOMEM))
6b2e6856 1063 goto out_sleep_timeout;
3453d570 1064 goto out_sleep;
3d35808b 1065 }
3453d570 1066 spin_unlock(&tbl->slot_tbl_lock);
3d35808b 1067
3be0f80b 1068 nfs4_sequence_attach_slot(args, res, slot);
3d35808b 1069
ad05cc0f 1070 trace_nfs4_setup_sequence(session, args);
9dd9107f 1071out_start:
c1dffe0b 1072 nfs41_sequence_res_init(res);
9dd9107f
AS		 1073 rpc_call_start(task);
1074 return 0;
6b2e6856
TM		 1075out_sleep_timeout:
1076 /* Try again in 1/4 second */
1077 if (args->sa_privileged)
1078 rpc_sleep_on_priority_timeout(&tbl->slot_tbl_waitq, task,
1079 jiffies + (HZ >> 2), RPC_PRIORITY_PRIVILEGED);
1080 else
1081 rpc_sleep_on_timeout(&tbl->slot_tbl_waitq, task,
1082 NULL, jiffies + (HZ >> 2));
1083 spin_unlock(&tbl->slot_tbl_lock);
1084 return -EAGAIN;
0dcee8bb
AS		 1085out_sleep:
1086 if (args->sa_privileged)
1087 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
8357a9b6 1088 RPC_PRIORITY_PRIVILEGED);
0dcee8bb
AS		 1089 else
1090 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
1091 spin_unlock(&tbl->slot_tbl_lock);
1092 return -EAGAIN;
7981c8a6
AS		 1093}
1094EXPORT_SYMBOL_GPL(nfs4_setup_sequence);
1095
9915ea7e
CL		 1096static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
1097{
1098 struct nfs4_call_sync_data *data = calldata;
42e1cca7 1099 nfs4_setup_sequence(data->seq_server->nfs_client,
9915ea7e
CL		 1100 data->seq_args, data->seq_res, task);
1101}
1102
1103static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
1104{
1105 struct nfs4_call_sync_data *data = calldata;
1106 nfs4_sequence_done(task, data->seq_res);
1107}
1108
1109static const struct rpc_call_ops nfs40_call_sync_ops = {
1110 .rpc_call_prepare = nfs40_call_sync_prepare,
1111 .rpc_call_done = nfs40_call_sync_done,
1112};
1113
48c05854
AS		 1114static int nfs4_call_sync_custom(struct rpc_task_setup *task_setup)
1115{
1116 int ret;
1117 struct rpc_task *task;
1118
1119 task = rpc_run_task(task_setup);
1120 if (IS_ERR(task))
1121 return PTR_ERR(task);
1122
1123 ret = task->tk_status;
1124 rpc_put_task(task);
1125 return ret;
1126}
1127
c74dfe97
TM		 1128static int nfs4_do_call_sync(struct rpc_clnt *clnt,
1129 struct nfs_server *server,
1130 struct rpc_message *msg,
1131 struct nfs4_sequence_args *args,
1132 struct nfs4_sequence_res *res,
1133 unsigned short task_flags)
ce5039c1 1134{
9915ea7e 1135 struct nfs_client *clp = server->nfs_client;
2a3eb2b9 1136 struct nfs4_call_sync_data data = {
035168ab 1137 .seq_server = server,
ce5039c1
AA		 1138 .seq_args = args,
1139 .seq_res = res,
ce5039c1
AA		 1140 };
1141 struct rpc_task_setup task_setup = {
7c513058 1142 .rpc_client = clnt,
ce5039c1 1143 .rpc_message = msg,
9915ea7e 1144 .callback_ops = clp->cl_mvops->call_sync_ops,
c74dfe97
TM		 1145 .callback_data = &data,
1146 .flags = task_flags,
ce5039c1
AA		 1147 };
1148
48c05854 1149 return nfs4_call_sync_custom(&task_setup);
ce5039c1
AA		 1150}
1151
c74dfe97
TM		 1152static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
1153 struct nfs_server *server,
1154 struct rpc_message *msg,
1155 struct nfs4_sequence_args *args,
1156 struct nfs4_sequence_res *res)
1157{
1158 return nfs4_do_call_sync(clnt, server, msg, args, res, 0);
1159}
1160
1161
7c513058
BS		 1162int nfs4_call_sync(struct rpc_clnt *clnt,
1163 struct nfs_server *server,
e73b83f2
BS		 1164 struct rpc_message *msg,
1165 struct nfs4_sequence_args *args,
1166 struct nfs4_sequence_res *res,
1167 int cache_reply)
1168{
fba83f34 1169 nfs4_init_sequence(args, res, cache_reply, 0);
9915ea7e 1170 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
e73b83f2 1171}
cccef3b9 1172
3c591175
TM		 1173static void
1174nfs4_inc_nlink_locked(struct inode *inode)
1175{
1176 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_OTHER;
1177 inc_nlink(inode);
1178}
1179
1180static void
1181nfs4_dec_nlink_locked(struct inode *inode)
1182{
1183 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_OTHER;
1184 drop_nlink(inode);
1185}
1186
1187static void
1b523ca9
FL		 1188nfs4_update_changeattr_locked(struct inode *inode,
1189 struct nfs4_change_info *cinfo,
5636ec4e 1190 unsigned long timestamp, unsigned long cache_validity)
1da177e4 1191{
1b523ca9 1192 struct nfs_inode *nfsi = NFS_I(inode);
1da177e4 1193
16e14375
TM		 1194 nfsi->cache_validity |= NFS_INO_INVALID_CTIME
1195 | NFS_INO_INVALID_MTIME
5636ec4e 1196 | cache_validity;
1b523ca9
FL		 1197
1198 if (cinfo->atomic && cinfo->before == inode_peek_iversion_raw(inode)) {
e603a4c1
TM		 1199 nfsi->cache_validity &= ~NFS_INO_REVAL_PAGECACHE;
1200 nfsi->attrtimeo_timestamp = jiffies;
1201 } else {
1b523ca9
FL		 1202 if (S_ISDIR(inode->i_mode)) {
1203 nfsi->cache_validity |= NFS_INO_INVALID_DATA;
1204 nfs_force_lookup_revalidate(inode);
1205 } else {
1206 if (!NFS_PROTO(inode)->have_delegation(inode,
1207 FMODE_READ))
1208 nfsi->cache_validity |= NFS_INO_REVAL_PAGECACHE;
1209 }
1210
1211 if (cinfo->before != inode_peek_iversion_raw(inode))
e603a4c1 1212 nfsi->cache_validity |= NFS_INO_INVALID_ACCESS |
0f44da51
FL		 1213 NFS_INO_INVALID_ACL |
1214 NFS_INO_INVALID_XATTR;
e603a4c1 1215 }
1b523ca9 1216 inode_set_iversion_raw(inode, cinfo->after);
d3129ef6 1217 nfsi->read_cache_jiffies = timestamp;
3235b403 1218 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
c8d07159 1219 nfsi->cache_validity &= ~NFS_INO_INVALID_CHANGE;
1b523ca9
FL		 1220
1221 if (nfsi->cache_validity & NFS_INO_INVALID_DATA)
1222 nfs_fscache_invalidate(inode);
3c591175
TM		 1223}
1224
1b523ca9
FL		 1225void
1226nfs4_update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo,
5636ec4e 1227 unsigned long timestamp, unsigned long cache_validity)
3c591175
TM		 1228{
1229 spin_lock(&dir->i_lock);
1b523ca9 1230 nfs4_update_changeattr_locked(dir, cinfo, timestamp, cache_validity);
38478b24 1231 spin_unlock(&dir->i_lock);
1da177e4
LT		 1232}
1233
8fd1ab74
TM		 1234struct nfs4_open_createattrs {
1235 struct nfs4_label *label;
1236 struct iattr *sattr;
1237 const __u32 verf[2];
1238};
1239
49f9a0fa
TM		 1240static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
1241 int err, struct nfs4_exception *exception)
1242{
1243 if (err != -EINVAL)
1244 return false;
1245 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1246 return false;
1247 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
1248 exception->retry = 1;
1249 return true;
1250}
1251
1bf85d8c
TM		 1252static fmode_t _nfs4_ctx_to_accessmode(const struct nfs_open_context *ctx)
1253{
1254 return ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
1255}
1256
1257static fmode_t _nfs4_ctx_to_openmode(const struct nfs_open_context *ctx)
1258{
1259 fmode_t ret = ctx->mode & (FMODE_READ|FMODE_WRITE);
1260
1261 return (ctx->mode & FMODE_EXEC) ? FMODE_READ | ret : ret;
1262}
1263
6ae37339
TM		 1264static u32
1265nfs4_map_atomic_open_share(struct nfs_server *server,
1266 fmode_t fmode, int openflags)
1267{
1268 u32 res = 0;
1269
1270 switch (fmode & (FMODE_READ | FMODE_WRITE)) {
1271 case FMODE_READ:
1272 res = NFS4_SHARE_ACCESS_READ;
1273 break;
1274 case FMODE_WRITE:
1275 res = NFS4_SHARE_ACCESS_WRITE;
1276 break;
1277 case FMODE_READ|FMODE_WRITE:
1278 res = NFS4_SHARE_ACCESS_BOTH;
1279 }
1280 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1281 goto out;
1282 /* Want no delegation if we're using O_DIRECT */
1283 if (openflags & O_DIRECT)
1284 res |= NFS4_SHARE_WANT_NO_DELEG;
1285out:
1286 return res;
1287}
1288
49f9a0fa
TM		 1289static enum open_claim_type4
1290nfs4_map_atomic_open_claim(struct nfs_server *server,
1291 enum open_claim_type4 claim)
1292{
1293 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
1294 return claim;
1295 switch (claim) {
1296 default:
1297 return claim;
1298 case NFS4_OPEN_CLAIM_FH:
1299 return NFS4_OPEN_CLAIM_NULL;
1300 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1301 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
1302 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1303 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
1304 }
1305}
2ced46c2
TM		 1306
1307static void nfs4_init_opendata_res(struct nfs4_opendata *p)
1308{
1309 p->o_res.f_attr = &p->f_attr;
1775fd3e 1310 p->o_res.f_label = p->f_label;
c1d51931
TM		 1311 p->o_res.seqid = p->o_arg.seqid;
1312 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 1313 p->o_res.server = p->o_arg.server;
5f657530 1314 p->o_res.access_request = p->o_arg.access;
2ced46c2 1315 nfs_fattr_init(&p->f_attr);
6926afd1 1316 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 1317}
1318
82a2c1b7 1319static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 1320 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8fd1ab74 1321 const struct nfs4_open_createattrs *c,
4a1c0893 1322 enum open_claim_type4 claim,
8535b2be 1323 gfp_t gfp_mask)
e56e0b78 1324{
82a2c1b7 1325 struct dentry *parent = dget_parent(dentry);
2b0143b5 1326 struct inode *dir = d_inode(parent);
e56e0b78 1327 struct nfs_server *server = NFS_SERVER(dir);
63f5f796 1328 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
8fd1ab74 1329 struct nfs4_label *label = (c != NULL) ? c->label : NULL;
e56e0b78
TM		 1330 struct nfs4_opendata *p;
1331
8535b2be 1332 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 1333 if (p == NULL)
1334 goto err;
14c43f76
DQ		 1335
1336 p->f_label = nfs4_label_alloc(server, gfp_mask);
1337 if (IS_ERR(p->f_label))
1338 goto err_free_p;
1339
a49c2691
KM		 1340 p->a_label = nfs4_label_alloc(server, gfp_mask);
1341 if (IS_ERR(p->a_label))
1342 goto err_free_f;
1343
63f5f796
TM		 1344 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
1345 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask);
badc76dd 1346 if (IS_ERR(p->o_arg.seqid))
14c43f76 1347 goto err_free_label;
82a2c1b7
AV		 1348 nfs_sb_active(dentry->d_sb);
1349 p->dentry = dget(dentry);
e56e0b78
TM		 1350 p->dir = parent;
1351 p->owner = sp;
1352 atomic_inc(&sp->so_count);
dc0b027d
TM		 1353 p->o_arg.open_flags = flags;
1354 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
536585cc 1355 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
6ae37339
TM		 1356 p->o_arg.share_access = nfs4_map_atomic_open_share(server,
1357 fmode, flags);
90910519
BC		 1358 if (flags & O_CREAT) {
1359 p->o_arg.umask = current_umask();
1360 p->o_arg.label = nfs4_label_copy(p->a_label, label);
1361 if (c->sattr != NULL && c->sattr->ia_valid != 0) {
1362 p->o_arg.u.attrs = &p->attrs;
1363 memcpy(&p->attrs, c->sattr, sizeof(p->attrs));
1364
1365 memcpy(p->o_arg.u.verifier.data, c->verf,
1366 sizeof(p->o_arg.u.verifier.data));
1367 }
1368 }
ae2bb032
WAA		 1369 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
1370 * will return permission denied for all bits until close */
1371 if (!(flags & O_EXCL)) {
1372 /* ask server to check for all possible rights as results
1373 * are cached */
536585cc
TM		 1374 switch (p->o_arg.claim) {
1375 default:
1376 break;
1377 case NFS4_OPEN_CLAIM_NULL:
1378 case NFS4_OPEN_CLAIM_FH:
1379 p->o_arg.access = NFS4_ACCESS_READ |
1380 NFS4_ACCESS_MODIFY |
1381 NFS4_ACCESS_EXTEND |
1382 NFS4_ACCESS_EXECUTE;
72832a24
FL		 1383#ifdef CONFIG_NFS_V4_2
1384 if (server->caps & NFS_CAP_XATTR)
1385 p->o_arg.access |= NFS4_ACCESS_XAREAD |
1386 NFS4_ACCESS_XAWRITE |
1387 NFS4_ACCESS_XALIST;
1388#endif
536585cc 1389 }
ae2bb032 1390 }
7539bbab 1391 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 1392 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1393 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 1394 p->o_arg.name = &dentry->d_name;
e56e0b78 1395 p->o_arg.server = server;
aa9c2669 1396 p->o_arg.bitmask = nfs4_bitmask(server, label);
1549210f 1397 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
49f9a0fa 1398 switch (p->o_arg.claim) {
4a1c0893
TM		 1399 case NFS4_OPEN_CLAIM_NULL:
1400 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1401 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1402 p->o_arg.fh = NFS_FH(dir);
1403 break;
1404 case NFS4_OPEN_CLAIM_PREVIOUS:
1405 case NFS4_OPEN_CLAIM_FH:
1406 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1407 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
2b0143b5 1408 p->o_arg.fh = NFS_FH(d_inode(dentry));
4a1c0893 1409 }
cdd4e68b
TM		 1410 p->c_arg.fh = &p->o_res.fh;
1411 p->c_arg.stateid = &p->o_res.stateid;
1412 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 1413 nfs4_init_opendata_res(p);
c6d00e63 1414 kref_init(&p->kref);
e56e0b78 1415 return p;
14c43f76
DQ		 1416
1417err_free_label:
a49c2691
KM		 1418 nfs4_label_free(p->a_label);
1419err_free_f:
14c43f76
DQ		 1420 nfs4_label_free(p->f_label);
1421err_free_p:
e56e0b78
TM		 1422 kfree(p);
1423err:
1424 dput(parent);
1425 return NULL;
1426}
1427
c6d00e63 1428static void nfs4_opendata_free(struct kref *kref)
e56e0b78 1429{
c6d00e63
TM		 1430 struct nfs4_opendata *p = container_of(kref,
1431 struct nfs4_opendata, kref);
82a2c1b7 1432 struct super_block *sb = p->dentry->d_sb;
c6d00e63 1433
30ae2412 1434 nfs4_lgopen_release(p->lgp);
c6d00e63 1435 nfs_free_seqid(p->o_arg.seqid);
2e80dbe7 1436 nfs4_sequence_free_slot(&p->o_res.seq_res);
aac00a8d
TM		 1437 if (p->state != NULL)
1438 nfs4_put_open_state(p->state);
c6d00e63 1439 nfs4_put_state_owner(p->owner);
14c43f76 1440
a49c2691 1441 nfs4_label_free(p->a_label);
14c43f76
DQ		 1442 nfs4_label_free(p->f_label);
1443
c6d00e63 1444 dput(p->dir);
82a2c1b7
AV		 1445 dput(p->dentry);
1446 nfs_sb_deactive(sb);
6926afd1 1447 nfs_fattr_free_names(&p->f_attr);
e911b815 1448 kfree(p->f_attr.mdsthreshold);
c6d00e63
TM		 1449 kfree(p);
1450}
1451
1452static void nfs4_opendata_put(struct nfs4_opendata *p)
1453{
1454 if (p != NULL)
1455 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 1456}
1457
24311f88
TM		 1458static bool nfs4_mode_match_open_stateid(struct nfs4_state *state,
1459 fmode_t fmode)
1460{
1461 switch(fmode & (FMODE_READ|FMODE_WRITE)) {
1462 case FMODE_READ|FMODE_WRITE:
1463 return state->n_rdwr != 0;
1464 case FMODE_WRITE:
1465 return state->n_wronly != 0;
1466 case FMODE_READ:
1467 return state->n_rdonly != 0;
1468 }
1469 WARN_ON_ONCE(1);
1470 return false;
1471}
1472
be189f7e
TM		 1473static int can_open_cached(struct nfs4_state *state, fmode_t mode,
1474 int open_mode, enum open_claim_type4 claim)
6ee41268
TM		 1475{
1476 int ret = 0;
dc0b027d 1477
536e43d1 1478 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d 1479 goto out;
be189f7e
TM		 1480 switch (claim) {
1481 case NFS4_OPEN_CLAIM_NULL:
1482 case NFS4_OPEN_CLAIM_FH:
1483 goto out;
1484 default:
1485 break;
1486 }
dc0b027d 1487 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 1488 case FMODE_READ:
88069f77
TM		 1489 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1490 && state->n_rdonly != 0;
6ee41268
TM		 1491 break;
1492 case FMODE_WRITE:
88069f77
TM		 1493 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1494 && state->n_wronly != 0;
6ee41268
TM		 1495 break;
1496 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 1497 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1498 && state->n_rdwr != 0;
6ee41268 1499 }
dc0b027d 1500out:
6ee41268
TM		 1501 return ret;
1502}
1503
2a606188
TM		 1504static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode,
1505 enum open_claim_type4 claim)
aac00a8d 1506{
652f89f6
TM		 1507 if (delegation == NULL)
1508 return 0;
dc0b027d 1509 if ((delegation->type & fmode) != fmode)
aac00a8d 1510 return 0;
2a606188
TM		 1511 switch (claim) {
1512 case NFS4_OPEN_CLAIM_NULL:
1513 case NFS4_OPEN_CLAIM_FH:
1514 break;
1515 case NFS4_OPEN_CLAIM_PREVIOUS:
1516 if (!test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
1517 break;
df561f66 1518 fallthrough;
2a606188
TM		 1519 default:
1520 return 0;
1521 }
b7391f44 1522 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 1523 return 1;
1524}
1525
dc0b027d 1526static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 1527{
dc0b027d 1528 switch (fmode) {
e7616923
TM		 1529 case FMODE_WRITE:
1530 state->n_wronly++;
1531 break;
1532 case FMODE_READ:
1533 state->n_rdonly++;
1534 break;
1535 case FMODE_READ|FMODE_WRITE:
1536 state->n_rdwr++;
1537 }
dc0b027d 1538 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 1539}
1540
8a64c4ef
TM		 1541#ifdef CONFIG_NFS_V4_1
1542static bool nfs_open_stateid_recover_openmode(struct nfs4_state *state)
1543{
1544 if (state->n_rdonly && !test_bit(NFS_O_RDONLY_STATE, &state->flags))
1545 return true;
1546 if (state->n_wronly && !test_bit(NFS_O_WRONLY_STATE, &state->flags))
1547 return true;
1548 if (state->n_rdwr && !test_bit(NFS_O_RDWR_STATE, &state->flags))
1549 return true;
1550 return false;
1551}
1552#endif /* CONFIG_NFS_V4_1 */
1553
c9399f21
TM		 1554static void nfs_state_log_update_open_stateid(struct nfs4_state *state)
1555{
1556 if (test_and_clear_bit(NFS_STATE_CHANGE_WAIT, &state->flags))
1557 wake_up_all(&state->waitq);
1558}
1559
4f14c194
TM		 1560static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
1561{
1562 struct nfs_client *clp = state->owner->so_server->nfs_client;
1563 bool need_recover = false;
1564
1565 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly)
1566 need_recover = true;
1567 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly)
1568 need_recover = true;
1569 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr)
1570 need_recover = true;
1571 if (need_recover)
1572 nfs4_state_mark_reclaim_nograce(clp, state);
1573}
1574
c9399f21
TM		 1575/*
1576 * Check for whether or not the caller may update the open stateid
1577 * to the value passed in by stateid.
1578 *
1579 * Note: This function relies heavily on the server implementing
1580 * RFC7530 Section 9.1.4.2, and RFC5661 Section 8.2.2
1581 * correctly.
1582 * i.e. The stateid seqids have to be initialised to 1, and
1583 * are then incremented on every state transition.
1584 */
b4868b44 1585static bool nfs_stateid_is_sequential(struct nfs4_state *state,
c9399f21 1586 const nfs4_stateid *stateid)
e999e80e 1587{
b4868b44
BC		 1588 if (test_bit(NFS_OPEN_STATE, &state->flags)) {
1589 /* The common case - we're updating to a new sequence number */
1590 if (nfs4_stateid_match_other(stateid, &state->open_stateid) &&
1591 nfs4_stateid_is_next(&state->open_stateid, stateid)) {
1592 return true;
1593 }
1594 } else {
1595 /* This is the first OPEN in this generation */
c9399f21 1596 if (stateid->seqid == cpu_to_be32(1))
b4868b44 1597 return true;
c9399f21 1598 }
e999e80e
TM		 1599 return false;
1600}
1601
f95549cf
TM		 1602static void nfs_resync_open_stateid_locked(struct nfs4_state *state)
1603{
3c38cbe2
TM		 1604 if (!(state->n_wronly || state->n_rdonly || state->n_rdwr))
1605 return;
f95549cf
TM		 1606 if (state->n_wronly)
1607 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1608 if (state->n_rdonly)
1609 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1610 if (state->n_rdwr)
1611 set_bit(NFS_O_RDWR_STATE, &state->flags);
3c38cbe2 1612 set_bit(NFS_OPEN_STATE, &state->flags);
f95549cf
TM		 1613}
1614
226056c5
TM		 1615static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
1616 nfs4_stateid *stateid, fmode_t fmode)
003707c7 1617{
226056c5
TM		 1618 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1619 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1620 case FMODE_WRITE:
1621 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1622 break;
1623 case FMODE_READ:
1624 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1625 break;
1626 case 0:
1627 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1628 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1629 clear_bit(NFS_OPEN_STATE, &state->flags);
1630 }
1631 if (stateid == NULL)
1632 return;
3e7dfb16
TM		 1633 /* Handle OPEN+OPEN_DOWNGRADE races */
1634 if (nfs4_stateid_match_other(stateid, &state->open_stateid) &&
1635 !nfs4_stateid_is_newer(stateid, &state->open_stateid)) {
f95549cf 1636 nfs_resync_open_stateid_locked(state);
c9399f21 1637 goto out;
f95549cf 1638 }
003707c7 1639 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 1640 nfs4_stateid_copy(&state->stateid, stateid);
1641 nfs4_stateid_copy(&state->open_stateid, stateid);
ad9e02dc 1642 trace_nfs4_open_stateid_update(state->inode, stateid, 0);
c9399f21
TM		 1643out:
1644 nfs_state_log_update_open_stateid(state);
226056c5
TM		 1645}
1646
4a1e2feb
TM		 1647static void nfs_clear_open_stateid(struct nfs4_state *state,
1648 nfs4_stateid *arg_stateid,
1649 nfs4_stateid *stateid, fmode_t fmode)
226056c5
TM		 1650{
1651 write_seqlock(&state->seqlock);
3e7dfb16
TM		 1652 /* Ignore, if the CLOSE argment doesn't match the current stateid */
1653 if (nfs4_state_match_open_stateid_other(state, arg_stateid))
1654 nfs_clear_open_stateid_locked(state, stateid, fmode);
226056c5 1655 write_sequnlock(&state->seqlock);
4f14c194
TM		 1656 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1657 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
226056c5
TM		 1658}
1659
1393d961 1660static void nfs_set_open_stateid_locked(struct nfs4_state *state,
c9399f21 1661 const nfs4_stateid *stateid, nfs4_stateid *freeme)
e9acf210
TM		 1662 __must_hold(&state->owner->so_lock)
1663 __must_hold(&state->seqlock)
1664 __must_hold(RCU)
1665
003707c7 1666{
c9399f21
TM		 1667 DEFINE_WAIT(wait);
1668 int status = 0;
1669 for (;;) {
1670
b4868b44 1671 if (nfs_stateid_is_sequential(state, stateid))
003707c7 1672 break;
b4868b44 1673
c9399f21 1674 if (status)
003707c7 1675 break;
c9399f21
TM		 1676 /* Rely on seqids for serialisation with NFSv4.0 */
1677 if (!nfs4_has_session(NFS_SERVER(state->inode)->nfs_client))
1678 break;
1679
b4868b44 1680 set_bit(NFS_STATE_CHANGE_WAIT, &state->flags);
c9399f21
TM		 1681 prepare_to_wait(&state->waitq, &wait, TASK_KILLABLE);
1682 /*
1683 * Ensure we process the state changes in the same order
1684 * in which the server processed them by delaying the
1685 * update of the stateid until we are in sequence.
1686 */
1687 write_sequnlock(&state->seqlock);
1688 spin_unlock(&state->owner->so_lock);
1689 rcu_read_unlock();
ad9e02dc 1690 trace_nfs4_open_stateid_update_wait(state->inode, stateid, 0);
b4868b44 1691
c9399f21
TM		 1692 if (!signal_pending(current)) {
1693 if (schedule_timeout(5*HZ) == 0)
1694 status = -EAGAIN;
1695 else
1696 status = 0;
1697 } else
1698 status = -EINTR;
1699 finish_wait(&state->waitq, &wait);
1700 rcu_read_lock();
1701 spin_lock(&state->owner->so_lock);
1702 write_seqlock(&state->seqlock);
003707c7 1703 }
c9399f21 1704
e1fff5df
TM		 1705 if (test_bit(NFS_OPEN_STATE, &state->flags) &&
1706 !nfs4_stateid_match_other(stateid, &state->open_stateid)) {
c9399f21
TM		 1707 nfs4_stateid_copy(freeme, &state->open_stateid);
1708 nfs_test_and_clear_all_open_stateid(state);
1709 }
1710
e999e80e
TM		 1711 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1712 nfs4_stateid_copy(&state->stateid, stateid);
1713 nfs4_stateid_copy(&state->open_stateid, stateid);
ad9e02dc 1714 trace_nfs4_open_stateid_update(state->inode, stateid, status);
c9399f21 1715 nfs_state_log_update_open_stateid(state);
003707c7
TM		 1716}
1717
c9399f21 1718static void nfs_state_set_open_stateid(struct nfs4_state *state,
1393d961 1719 const nfs4_stateid *open_stateid,
1393d961
TM		 1720 fmode_t fmode,
1721 nfs4_stateid *freeme)
1da177e4 1722{
8bda4e4c
TM		 1723 /*
1724 * Protect the call to nfs4_state_set_mode_locked and
1725 * serialise the stateid update
1726 */
1727 write_seqlock(&state->seqlock);
c9399f21
TM		 1728 nfs_set_open_stateid_locked(state, open_stateid, freeme);
1729 switch (fmode) {
1730 case FMODE_READ:
1731 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1732 break;
1733 case FMODE_WRITE:
1734 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1735 break;
1736 case FMODE_READ|FMODE_WRITE:
1737 set_bit(NFS_O_RDWR_STATE, &state->flags);
003707c7 1738 }
c9399f21
TM		 1739 set_bit(NFS_OPEN_STATE, &state->flags);
1740 write_sequnlock(&state->seqlock);
1741}
1742
27a30cf6
TM		 1743static void nfs_state_clear_open_state_flags(struct nfs4_state *state)
1744{
1745 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1746 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1747 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1748 clear_bit(NFS_OPEN_STATE, &state->flags);
1749}
1750
c9399f21
TM		 1751static void nfs_state_set_delegation(struct nfs4_state *state,
1752 const nfs4_stateid *deleg_stateid,
1753 fmode_t fmode)
1754{
1755 /*
1756 * Protect the call to nfs4_state_set_mode_locked and
1757 * serialise the stateid update
1758 */
1759 write_seqlock(&state->seqlock);
1760 nfs4_stateid_copy(&state->stateid, deleg_stateid);
1761 set_bit(NFS_DELEGATED_STATE, &state->flags);
8bda4e4c 1762 write_sequnlock(&state->seqlock);
1da177e4
LT		 1763}
1764
9f0c5124
TM		 1765static void nfs_state_clear_delegation(struct nfs4_state *state)
1766{
1767 write_seqlock(&state->seqlock);
1768 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1769 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1770 write_sequnlock(&state->seqlock);
1771}
1772
ec4b0925 1773int update_open_stateid(struct nfs4_state *state,
1393d961
TM		 1774 const nfs4_stateid *open_stateid,
1775 const nfs4_stateid *delegation,
1776 fmode_t fmode)
34310430 1777{
1393d961
TM		 1778 struct nfs_server *server = NFS_SERVER(state->inode);
1779 struct nfs_client *clp = server->nfs_client;
34310430
TM		 1780 struct nfs_inode *nfsi = NFS_I(state->inode);
1781 struct nfs_delegation *deleg_cur;
83aa3e0f 1782 nfs4_stateid freeme = { };
34310430
TM		 1783 int ret = 0;
1784
dc0b027d 1785 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1786
1787 rcu_read_lock();
c9399f21
TM		 1788 spin_lock(&state->owner->so_lock);
1789 if (open_stateid != NULL) {
1790 nfs_state_set_open_stateid(state, open_stateid, fmode, &freeme);
1791 ret = 1;
1792 }
1793
333ac786 1794 deleg_cur = nfs4_get_valid_delegation(state->inode);
34310430
TM		 1795 if (deleg_cur == NULL)
1796 goto no_delegation;
1797
1798 spin_lock(&deleg_cur->lock);
17f26b12 1799 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
d25be546 1800 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1801 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1802 goto no_delegation_unlock;
1803
1804 if (delegation == NULL)
1805 delegation = &deleg_cur->stateid;
333ac786 1806 else if (!nfs4_stateid_match_other(&deleg_cur->stateid, delegation))
34310430
TM		 1807 goto no_delegation_unlock;
1808
b7391f44 1809 nfs_mark_delegation_referenced(deleg_cur);
c9399f21 1810 nfs_state_set_delegation(state, &deleg_cur->stateid, fmode);
34310430
TM		 1811 ret = 1;
1812no_delegation_unlock:
1813 spin_unlock(&deleg_cur->lock);
1814no_delegation:
c9399f21
TM		 1815 if (ret)
1816 update_open_stateflags(state, fmode);
1817 spin_unlock(&state->owner->so_lock);
34310430
TM		 1818 rcu_read_unlock();
1819
4f14c194 1820 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1393d961
TM		 1821 nfs4_schedule_state_manager(clp);
1822 if (freeme.type != 0)
1823 nfs4_test_and_free_stateid(server, &freeme,
1824 state->owner->so_cred);
34310430
TM		 1825
1826 return ret;
1827}
1828
39071e6f
TM		 1829static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp,
1830 const nfs4_stateid *stateid)
1831{
1832 struct nfs4_state *state = lsp->ls_state;
1833 bool ret = false;
1834
1835 spin_lock(&state->state_lock);
1836 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid))
1837 goto out_noupdate;
1838 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid))
1839 goto out_noupdate;
1840 nfs4_stateid_copy(&lsp->ls_stateid, stateid);
1841 ret = true;
1842out_noupdate:
1843 spin_unlock(&state->state_lock);
1844 return ret;
1845}
34310430 1846
dc0b027d 1847static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1848{
1849 struct nfs_delegation *delegation;
1850
f5086242 1851 fmode &= FMODE_READ|FMODE_WRITE;
aac00a8d 1852 rcu_read_lock();
40e6aa10 1853 delegation = nfs4_get_valid_delegation(inode);
dc0b027d 1854 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1855 rcu_read_unlock();
1856 return;
1857 }
1858 rcu_read_unlock();
57ec14c5 1859 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1860}
1861
6ee41268 1862static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1863{
1864 struct nfs4_state *state = opendata->state;
aac00a8d 1865 struct nfs_delegation *delegation;
f448badd 1866 int open_mode = opendata->o_arg.open_flags;
dc0b027d 1867 fmode_t fmode = opendata->o_arg.fmode;
2a606188 1868 enum open_claim_type4 claim = opendata->o_arg.claim;
aac00a8d
TM		 1869 nfs4_stateid stateid;
1870 int ret = -EAGAIN;
1871
aac00a8d 1872 for (;;) {
61beef75 1873 spin_lock(&state->owner->so_lock);
be189f7e 1874 if (can_open_cached(state, fmode, open_mode, claim)) {
61beef75 1875 update_open_stateflags(state, fmode);
6ee41268 1876 spin_unlock(&state->owner->so_lock);
61beef75 1877 goto out_return_state;
6ee41268 1878 }
61beef75 1879 spin_unlock(&state->owner->so_lock);
34310430 1880 rcu_read_lock();
be3df3dd 1881 delegation = nfs4_get_valid_delegation(state->inode);
2a606188 1882 if (!can_open_delegated(delegation, fmode, claim)) {
34310430 1883 rcu_read_unlock();
aac00a8d 1884 break;
34310430 1885 }
aac00a8d 1886 /* Save the delegation */
f597c537 1887 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1888 rcu_read_unlock();
fa332941 1889 nfs_release_seqid(opendata->o_arg.seqid);
bdeca1b7
TM		 1890 if (!opendata->is_recover) {
1891 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1892 if (ret != 0)
1893 goto out;
1894 }
aac00a8d 1895 ret = -EAGAIN;
34310430
TM		 1896
1897 /* Try to update the stateid using the delegation */
dc0b027d 1898 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1899 goto out_return_state;
aac00a8d 1900 }
aac00a8d
TM		 1901out:
1902 return ERR_PTR(ret);
1903out_return_state:
ace9fad4 1904 refcount_inc(&state->count);
aac00a8d
TM		 1905 return state;
1906}
1907
e23008ec
AA		 1908static void
1909nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1910{
1911 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1912 struct nfs_delegation *delegation;
1913 int delegation_flags = 0;
1914
1915 rcu_read_lock();
1916 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1917 if (delegation)
1918 delegation_flags = delegation->flags;
1919 rcu_read_unlock();
72d79ff8
TM		 1920 switch (data->o_arg.claim) {
1921 default:
1922 break;
1923 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1924 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
e23008ec
AA		 1925 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1926 "returning a delegation for "
1927 "OPEN(CLAIM_DELEGATE_CUR)\n",
1928 clp->cl_hostname);
72d79ff8
TM		 1929 return;
1930 }
1931 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
e23008ec 1932 nfs_inode_set_delegation(state->inode,
35156bff
TM		 1933 data->owner->so_cred,
1934 data->o_res.delegation_type,
1935 &data->o_res.delegation,
1936 data->o_res.pagemod_limit);
e23008ec
AA		 1937 else
1938 nfs_inode_reclaim_delegation(state->inode,
35156bff
TM		 1939 data->owner->so_cred,
1940 data->o_res.delegation_type,
1941 &data->o_res.delegation,
1942 data->o_res.pagemod_limit);
8b199e58
JL		 1943
1944 if (data->o_res.do_recall)
1945 nfs_async_inode_return_delegation(state->inode,
1946 &data->o_res.delegation);
e23008ec
AA		 1947}
1948
1949/*
1950 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1951 * and update the nfs4_state.
1952 */
1953static struct nfs4_state *
1954_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1955{
1956 struct inode *inode = data->state->inode;
1957 struct nfs4_state *state = data->state;
1958 int ret;
1959
d2bfda2e 1960 if (!data->rpc_done) {
37a8484a
AS		 1961 if (data->rpc_status)
1962 return ERR_PTR(data->rpc_status);
d2bfda2e
WAA		 1963 /* cached opens have already been processed */
1964 goto update;
e23008ec
AA		 1965 }
1966
e23008ec
AA		 1967 ret = nfs_refresh_inode(inode, &data->f_attr);
1968 if (ret)
37a8484a 1969 return ERR_PTR(ret);
e23008ec
AA		 1970
1971 if (data->o_res.delegation_type != 0)
1972 nfs4_opendata_check_deleg(data, state);
d2bfda2e 1973update:
e3c8dc76
TM		 1974 if (!update_open_stateid(state, &data->o_res.stateid,
1975 NULL, data->o_arg.fmode))
1976 return ERR_PTR(-EAGAIN);
ace9fad4 1977 refcount_inc(&state->count);
e23008ec
AA		 1978
1979 return state;
e23008ec
AA		 1980}
1981
4e2fcac7
TM		 1982static struct inode *
1983nfs4_opendata_get_inode(struct nfs4_opendata *data)
1984{
1985 struct inode *inode;
1986
1987 switch (data->o_arg.claim) {
1988 case NFS4_OPEN_CLAIM_NULL:
1989 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1990 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1991 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1992 return ERR_PTR(-EAGAIN);
1993 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh,
1994 &data->f_attr, data->f_label);
1995 break;
1996 default:
1997 inode = d_inode(data->dentry);
1998 ihold(inode);
1999 nfs_refresh_inode(inode, &data->f_attr);
2000 }
2001 return inode;
2002}
2003
e23008ec 2004static struct nfs4_state *
75e8c48b 2005nfs4_opendata_find_nfs4_state(struct nfs4_opendata *data)
24ac23ab 2006{
75e8c48b 2007 struct nfs4_state *state;
24ac23ab 2008 struct inode *inode;
75e8c48b
TM		 2009
2010 inode = nfs4_opendata_get_inode(data);
2011 if (IS_ERR(inode))
2012 return ERR_CAST(inode);
2013 if (data->state != NULL && data->state->inode == inode) {
2014 state = data->state;
ace9fad4 2015 refcount_inc(&state->count);
75e8c48b
TM		 2016 } else
2017 state = nfs4_get_open_state(inode, data->owner);
2018 iput(inode);
2019 if (state == NULL)
2020 state = ERR_PTR(-ENOMEM);
2021 return state;
2022}
2023
2024static struct nfs4_state *
2025_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
2026{
2027 struct nfs4_state *state;
24ac23ab 2028
aac00a8d 2029 if (!data->rpc_done) {
6ee41268 2030 state = nfs4_try_open_cached(data);
9759b0fb 2031 trace_nfs4_cached_open(data->state);
aac00a8d
TM		 2032 goto out;
2033 }
2034
75e8c48b
TM		 2035 state = nfs4_opendata_find_nfs4_state(data);
2036 if (IS_ERR(state))
2037 goto out;
2038
e23008ec
AA		 2039 if (data->o_res.delegation_type != 0)
2040 nfs4_opendata_check_deleg(data, state);
e3c8dc76
TM		 2041 if (!update_open_stateid(state, &data->o_res.stateid,
2042 NULL, data->o_arg.fmode)) {
2043 nfs4_put_open_state(state);
2044 state = ERR_PTR(-EAGAIN);
2045 }
aac00a8d 2046out:
7aa262b5 2047 nfs_release_seqid(data->o_arg.seqid);
24ac23ab
TM		 2048 return state;
2049}
2050
e23008ec
AA		 2051static struct nfs4_state *
2052nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
2053{
2e80dbe7
TM		 2054 struct nfs4_state *ret;
2055
e23008ec 2056 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
2e80dbe7
TM		 2057 ret =_nfs4_opendata_reclaim_to_nfs4_state(data);
2058 else
2059 ret = _nfs4_opendata_to_nfs4_state(data);
2060 nfs4_sequence_free_slot(&data->o_res.seq_res);
2061 return ret;
e23008ec
AA		 2062}
2063
0de43976
TM		 2064static struct nfs_open_context *
2065nfs4_state_find_open_context_mode(struct nfs4_state *state, fmode_t mode)
864472e9
TM		 2066{
2067 struct nfs_inode *nfsi = NFS_I(state->inode);
2068 struct nfs_open_context *ctx;
2069
0de43976
TM		 2070 rcu_read_lock();
2071 list_for_each_entry_rcu(ctx, &nfsi->open_files, list) {
864472e9
TM		 2072 if (ctx->state != state)
2073 continue;
0de43976
TM		 2074 if ((ctx->mode & mode) != mode)
2075 continue;
2076 if (!get_nfs_open_context(ctx))
2077 continue;
2078 rcu_read_unlock();
864472e9
TM		 2079 return ctx;
2080 }
0de43976 2081 rcu_read_unlock();
864472e9
TM		 2082 return ERR_PTR(-ENOENT);
2083}
2084
0de43976
TM		 2085static struct nfs_open_context *
2086nfs4_state_find_open_context(struct nfs4_state *state)
2087{
2088 struct nfs_open_context *ctx;
2089
2090 ctx = nfs4_state_find_open_context_mode(state, FMODE_READ|FMODE_WRITE);
2091 if (!IS_ERR(ctx))
2092 return ctx;
2093 ctx = nfs4_state_find_open_context_mode(state, FMODE_WRITE);
2094 if (!IS_ERR(ctx))
2095 return ctx;
2096 return nfs4_state_find_open_context_mode(state, FMODE_READ);
2097}
2098
4a1c0893
TM		 2099static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
2100 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 2101{
2102 struct nfs4_opendata *opendata;
2103
4a1c0893 2104 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
8fd1ab74 2105 NULL, claim, GFP_NOFS);
6f220ed5
TM		 2106 if (opendata == NULL)
2107 return ERR_PTR(-ENOMEM);
2108 opendata->state = state;
ace9fad4 2109 refcount_inc(&state->count);
6f220ed5
TM		 2110 return opendata;
2111}
2112
24311f88
TM		 2113static int nfs4_open_recover_helper(struct nfs4_opendata *opendata,
2114 fmode_t fmode)
864472e9 2115{
2ced46c2 2116 struct nfs4_state *newstate;
864472e9
TM		 2117 int ret;
2118
24311f88 2119 if (!nfs4_mode_match_open_stateid(opendata->state, fmode))
39f897fd 2120 return 0;
dc0b027d
TM		 2121 opendata->o_arg.open_flags = 0;
2122 opendata->o_arg.fmode = fmode;
be36e185
TM		 2123 opendata->o_arg.share_access = nfs4_map_atomic_open_share(
2124 NFS_SB(opendata->dentry->d_sb),
2125 fmode, 0);
2ced46c2
TM		 2126 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
2127 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
2128 nfs4_init_opendata_res(opendata);
b257957e 2129 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 2130 if (ret != 0)
2131 return ret;
2ced46c2 2132 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 2133 if (IS_ERR(newstate))
2134 return PTR_ERR(newstate);
24311f88
TM		 2135 if (newstate != opendata->state)
2136 ret = -ESTALE;
643168c2 2137 nfs4_close_state(newstate, fmode);
24311f88 2138 return ret;
864472e9
TM		 2139}
2140
2141static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
2142{
864472e9
TM		 2143 int ret;
2144
2145 /* memory barrier prior to reading state->n_* */
2146 smp_rmb();
24311f88
TM		 2147 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
2148 if (ret != 0)
2149 return ret;
2150 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE);
2151 if (ret != 0)
2152 return ret;
2153 ret = nfs4_open_recover_helper(opendata, FMODE_READ);
2154 if (ret != 0)
2155 return ret;
1ac7e2fd
TM		 2156 /*
2157 * We may have performed cached opens for all three recoveries.
2158 * Check if we need to update the current stateid.
2159 */
2160 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 2161 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 2162 write_seqlock(&state->seqlock);
1ac7e2fd 2163 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 2164 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 2165 write_sequnlock(&state->seqlock);
1ac7e2fd 2166 }
864472e9
TM		 2167 return 0;
2168}
2169
1da177e4
LT		 2170/*
2171 * OPEN_RECLAIM:
2172 * reclaim state on the server after a reboot.
1da177e4 2173 */
539cd03a 2174static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 2175{
1ac7e2fd 2176 struct nfs_delegation *delegation;
864472e9 2177 struct nfs4_opendata *opendata;
dc0b027d 2178 fmode_t delegation_type = 0;
1da177e4
LT		 2179 int status;
2180
4a1c0893
TM		 2181 opendata = nfs4_open_recoverdata_alloc(ctx, state,
2182 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 2183 if (IS_ERR(opendata))
2184 return PTR_ERR(opendata);
1ac7e2fd
TM		 2185 rcu_read_lock();
2186 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 2187 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 2188 delegation_type = delegation->type;
1ac7e2fd 2189 rcu_read_unlock();
864472e9
TM		 2190 opendata->o_arg.u.delegation_type = delegation_type;
2191 status = nfs4_open_recover(opendata, state);
c6d00e63 2192 nfs4_opendata_put(opendata);
1da177e4
LT		 2193 return status;
2194}
2195
539cd03a 2196static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 2197{
2198 struct nfs_server *server = NFS_SERVER(state->inode);
2199 struct nfs4_exception exception = { };
2200 int err;
2201 do {
539cd03a 2202 err = _nfs4_do_open_reclaim(ctx, state);
42113a75 2203 trace_nfs4_open_reclaim(ctx, 0, err);
49f9a0fa
TM		 2204 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2205 continue;
168667c4 2206 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 2207 break;
2208 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 2209 } while (exception.retry);
2210 return err;
2211}
2212
864472e9
TM		 2213static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
2214{
2215 struct nfs_open_context *ctx;
2216 int ret;
2217
2218 ctx = nfs4_state_find_open_context(state);
2219 if (IS_ERR(ctx))
91876b13 2220 return -EAGAIN;
27a30cf6
TM		 2221 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2222 nfs_state_clear_open_state_flags(state);
539cd03a 2223 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 2224 put_nfs_open_context(ctx);
2225 return ret;
2226}
2227
dce2630c 2228static 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 2229{
be76b5b6
TM		 2230 switch (err) {
2231 default:
2232 printk(KERN_ERR "NFS: %s: unhandled error "
2233 "%d.\n", __func__, err);
2234 case 0:
2235 case -ENOENT:
8eee52af 2236 case -EAGAIN:
be76b5b6 2237 case -ESTALE:
67e7b52d 2238 case -ETIMEDOUT:
be76b5b6
TM		 2239 break;
2240 case -NFS4ERR_BADSESSION:
2241 case -NFS4ERR_BADSLOT:
2242 case -NFS4ERR_BAD_HIGH_SLOT:
2243 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
2244 case -NFS4ERR_DEADSESSION:
be76b5b6
TM		 2245 return -EAGAIN;
2246 case -NFS4ERR_STALE_CLIENTID:
2247 case -NFS4ERR_STALE_STATEID:
be76b5b6
TM		 2248 /* Don't recall a delegation if it was lost */
2249 nfs4_schedule_lease_recovery(server->nfs_client);
2250 return -EAGAIN;
352297b9
CL		 2251 case -NFS4ERR_MOVED:
2252 nfs4_schedule_migration_recovery(server);
2253 return -EAGAIN;
8ef2f8d4
CL		 2254 case -NFS4ERR_LEASE_MOVED:
2255 nfs4_schedule_lease_moved_recovery(server->nfs_client);
2256 return -EAGAIN;
be76b5b6
TM		 2257 case -NFS4ERR_DELEG_REVOKED:
2258 case -NFS4ERR_ADMIN_REVOKED:
404ea356 2259 case -NFS4ERR_EXPIRED:
be76b5b6 2260 case -NFS4ERR_BAD_STATEID:
db4f2e63 2261 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 2262 nfs_inode_find_state_and_recover(state->inode,
2263 stateid);
2264 nfs4_schedule_stateid_recovery(server, state);
869f9dfa 2265 return -EAGAIN;
be76b5b6
TM		 2266 case -NFS4ERR_DELAY:
2267 case -NFS4ERR_GRACE:
be76b5b6
TM		 2268 ssleep(1);
2269 return -EAGAIN;
db4f2e63
TM		 2270 case -ENOMEM:
2271 case -NFS4ERR_DENIED:
dce2630c
N		 2272 if (fl) {
2273 struct nfs4_lock_state *lsp = fl->fl_u.nfs4_fl.owner;
2274 if (lsp)
2275 set_bit(NFS_LOCK_LOST, &lsp->ls_flags);
2276 }
db4f2e63 2277 return 0;
be76b5b6 2278 }
1da177e4
LT		 2279 return err;
2280}
2281
24311f88 2282int nfs4_open_delegation_recall(struct nfs_open_context *ctx,
5eb8d18c 2283 struct nfs4_state *state, const nfs4_stateid *stateid)
db4f2e63
TM		 2284{
2285 struct nfs_server *server = NFS_SERVER(state->inode);
2286 struct nfs4_opendata *opendata;
24311f88 2287 int err = 0;
db4f2e63
TM		 2288
2289 opendata = nfs4_open_recoverdata_alloc(ctx, state,
2290 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
2291 if (IS_ERR(opendata))
2292 return PTR_ERR(opendata);
2293 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
5eb8d18c 2294 if (!test_bit(NFS_O_RDWR_STATE, &state->flags)) {
24311f88
TM		 2295 err = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
2296 if (err)
5eb8d18c
TM		 2297 goto out;
2298 }
2299 if (!test_bit(NFS_O_WRONLY_STATE, &state->flags)) {
24311f88
TM		 2300 err = nfs4_open_recover_helper(opendata, FMODE_WRITE);
2301 if (err)
5eb8d18c
TM		 2302 goto out;
2303 }
2304 if (!test_bit(NFS_O_RDONLY_STATE, &state->flags)) {
24311f88 2305 err = nfs4_open_recover_helper(opendata, FMODE_READ);
5eb8d18c
TM		 2306 if (err)
2307 goto out;
24311f88 2308 }
5eb8d18c
TM		 2309 nfs_state_clear_delegation(state);
2310out:
db4f2e63 2311 nfs4_opendata_put(opendata);
dce2630c 2312 return nfs4_handle_delegation_recall_error(server, state, stateid, NULL, err);
db4f2e63
TM		 2313}
2314
be05c860
CL		 2315static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
2316{
2317 struct nfs4_opendata *data = calldata;
2318
7981c8a6
AS		 2319 nfs4_setup_sequence(data->o_arg.server->nfs_client,
2320 &data->c_arg.seq_args, &data->c_res.seq_res, task);
be05c860
CL		 2321}
2322
cdd4e68b
TM		 2323static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
2324{
2325 struct nfs4_opendata *data = calldata;
2326
17ead6c8 2327 nfs40_sequence_done(task, &data->c_res.seq_res);
be05c860 2328
cdd4e68b 2329 data->rpc_status = task->tk_status;
26e976a8 2330 if (data->rpc_status == 0) {
f597c537 2331 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 2332 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 2333 renew_lease(data->o_res.server, data->timestamp);
a7a3b1e9 2334 data->rpc_done = true;
26e976a8 2335 }
cdd4e68b
TM		 2336}
2337
2338static void nfs4_open_confirm_release(void *calldata)
2339{
2340 struct nfs4_opendata *data = calldata;
2341 struct nfs4_state *state = NULL;
2342
2343 /* If this request hasn't been cancelled, do nothing */
a7a3b1e9 2344 if (!data->cancelled)
cdd4e68b
TM		 2345 goto out_free;
2346 /* In case of error, no cleanup! */
3e309914 2347 if (!data->rpc_done)
cdd4e68b 2348 goto out_free;
cdd4e68b 2349 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 2350 if (!IS_ERR(state))
643168c2 2351 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 2352out_free:
c6d00e63 2353 nfs4_opendata_put(data);
cdd4e68b
TM		 2354}
2355
2356static const struct rpc_call_ops nfs4_open_confirm_ops = {
be05c860 2357 .rpc_call_prepare = nfs4_open_confirm_prepare,
cdd4e68b
TM		 2358 .rpc_call_done = nfs4_open_confirm_done,
2359 .rpc_release = nfs4_open_confirm_release,
2360};
2361
2362/*
2363 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
2364 */
2365static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
2366{
2b0143b5 2367 struct nfs_server *server = NFS_SERVER(d_inode(data->dir));
cdd4e68b 2368 struct rpc_task *task;
5138fde0
TM		 2369 struct rpc_message msg = {
2370 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
2371 .rpc_argp = &data->c_arg,
2372 .rpc_resp = &data->c_res,
2373 .rpc_cred = data->owner->so_cred,
2374 };
c970aa85
TM		 2375 struct rpc_task_setup task_setup_data = {
2376 .rpc_client = server->client,
5138fde0 2377 .rpc_message = &msg,
c970aa85
TM		 2378 .callback_ops = &nfs4_open_confirm_ops,
2379 .callback_data = data,
101070ca 2380 .workqueue = nfsiod_workqueue,
61296507 2381 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF,
c970aa85 2382 };
1da177e4
LT		 2383 int status;
2384
fba83f34
AS		 2385 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1,
2386 data->is_recover);
c6d00e63 2387 kref_get(&data->kref);
a7a3b1e9 2388 data->rpc_done = false;
3e309914 2389 data->rpc_status = 0;
5138fde0 2390 data->timestamp = jiffies;
c970aa85 2391 task = rpc_run_task(&task_setup_data);
7a1218a2 2392 if (IS_ERR(task))
cdd4e68b 2393 return PTR_ERR(task);
820bf85c 2394 status = rpc_wait_for_completion_task(task);
cdd4e68b 2395 if (status != 0) {
a7a3b1e9 2396 data->cancelled = true;
cdd4e68b
TM		 2397 smp_wmb();
2398 } else
2399 status = data->rpc_status;
e6b3c4db 2400 rpc_put_task(task);
1da177e4
LT		 2401 return status;
2402}
2403
24ac23ab 2404static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 2405{
24ac23ab
TM		 2406 struct nfs4_opendata *data = calldata;
2407 struct nfs4_state_owner *sp = data->owner;
549b19cc 2408 struct nfs_client *clp = sp->so_server->nfs_client;
2a606188 2409 enum open_claim_type4 claim = data->o_arg.claim;
5138fde0 2410
24ac23ab 2411 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 2412 goto out_wait;
aac00a8d
TM		 2413 /*
2414 * Check if we still need to send an OPEN call, or if we can use
2415 * a delegation instead.
2416 */
2417 if (data->state != NULL) {
2418 struct nfs_delegation *delegation;
2419
be189f7e
TM		 2420 if (can_open_cached(data->state, data->o_arg.fmode,
2421 data->o_arg.open_flags, claim))
6ee41268 2422 goto out_no_action;
aac00a8d 2423 rcu_read_lock();
be3df3dd 2424 delegation = nfs4_get_valid_delegation(data->state->inode);
2a606188 2425 if (can_open_delegated(delegation, data->o_arg.fmode, claim))
652f89f6 2426 goto unlock_no_action;
aac00a8d
TM		 2427 rcu_read_unlock();
2428 }
95b72eb0 2429 /* Update client id. */
549b19cc 2430 data->o_arg.clientid = clp->cl_clientid;
2a606188
TM		 2431 switch (claim) {
2432 default:
2433 break;
8188df17
TM		 2434 case NFS4_OPEN_CLAIM_PREVIOUS:
2435 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
2436 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 2437 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
df561f66 2438 fallthrough;
8188df17
TM		 2439 case NFS4_OPEN_CLAIM_FH:
2440 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5 2441 }
26e976a8 2442 data->timestamp = jiffies;
42e1cca7 2443 if (nfs4_setup_sequence(data->o_arg.server->nfs_client,
d898528c 2444 &data->o_arg.seq_args,
2240a9e2
TM		 2445 &data->o_res.seq_res,
2446 task) != 0)
2447 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 2448
2449 /* Set the create mode (note dependency on the session type) */
2450 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
2451 if (data->o_arg.open_flags & O_EXCL) {
2452 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
2453 if (nfs4_has_persistent_session(clp))
2454 data->o_arg.createmode = NFS4_CREATE_GUARDED;
2455 else if (clp->cl_mvops->minor_version > 0)
2456 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
2457 }
6ee41268 2458 return;
652f89f6 2459unlock_no_action:
9759b0fb 2460 trace_nfs4_cached_open(data->state);
652f89f6 2461 rcu_read_unlock();
6ee41268
TM		 2462out_no_action:
2463 task->tk_action = NULL;
c8da19b9 2464out_wait:
b75ad4cd 2465 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 2466}
2467
24ac23ab
TM		 2468static void nfs4_open_done(struct rpc_task *task, void *calldata)
2469{
2470 struct nfs4_opendata *data = calldata;
1da177e4 2471
24ac23ab 2472 data->rpc_status = task->tk_status;
d898528c 2473
2e80dbe7 2474 if (!nfs4_sequence_process(task, &data->o_res.seq_res))
14516c3a 2475 return;
d898528c 2476
24ac23ab 2477 if (task->tk_status == 0) {
807d66d8
TM		 2478 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
2479 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 2480 case S_IFREG:
2481 break;
2482 case S_IFLNK:
24ac23ab 2483 data->rpc_status = -ELOOP;
6f926b5b
TM		 2484 break;
2485 case S_IFDIR:
24ac23ab 2486 data->rpc_status = -EISDIR;
6f926b5b
TM		 2487 break;
2488 default:
24ac23ab 2489 data->rpc_status = -ENOTDIR;
807d66d8 2490 }
6f926b5b 2491 }
26e976a8 2492 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 2493 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
2494 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 2495 }
a7a3b1e9 2496 data->rpc_done = true;
24ac23ab 2497}
6f926b5b 2498
24ac23ab
TM		 2499static void nfs4_open_release(void *calldata)
2500{
2501 struct nfs4_opendata *data = calldata;
2502 struct nfs4_state *state = NULL;
2503
2504 /* If this request hasn't been cancelled, do nothing */
a7a3b1e9 2505 if (!data->cancelled)
24ac23ab
TM		 2506 goto out_free;
2507 /* In case of error, no cleanup! */
3e309914 2508 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 2509 goto out_free;
2510 /* In case we need an open_confirm, no cleanup! */
2511 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
2512 goto out_free;
24ac23ab 2513 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 2514 if (!IS_ERR(state))
643168c2 2515 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 2516out_free:
c6d00e63 2517 nfs4_opendata_put(data);
24ac23ab
TM		 2518}
2519
2520static const struct rpc_call_ops nfs4_open_ops = {
2521 .rpc_call_prepare = nfs4_open_prepare,
2522 .rpc_call_done = nfs4_open_done,
2523 .rpc_release = nfs4_open_release,
2524};
2525
3b65a30d
FI		 2526static int nfs4_run_open_task(struct nfs4_opendata *data,
2527 struct nfs_open_context *ctx)
24ac23ab 2528{
2b0143b5 2529 struct inode *dir = d_inode(data->dir);
24ac23ab
TM		 2530 struct nfs_server *server = NFS_SERVER(dir);
2531 struct nfs_openargs *o_arg = &data->o_arg;
2532 struct nfs_openres *o_res = &data->o_res;
2533 struct rpc_task *task;
5138fde0
TM		 2534 struct rpc_message msg = {
2535 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
2536 .rpc_argp = o_arg,
2537 .rpc_resp = o_res,
2538 .rpc_cred = data->owner->so_cred,
2539 };
c970aa85
TM		 2540 struct rpc_task_setup task_setup_data = {
2541 .rpc_client = server->client,
5138fde0 2542 .rpc_message = &msg,
c970aa85
TM		 2543 .callback_ops = &nfs4_open_ops,
2544 .callback_data = data,
101070ca 2545 .workqueue = nfsiod_workqueue,
61296507 2546 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF,
c970aa85 2547 };
24ac23ab
TM		 2548 int status;
2549
c6d00e63 2550 kref_get(&data->kref);
a7a3b1e9 2551 data->rpc_done = false;
3e309914 2552 data->rpc_status = 0;
a7a3b1e9
BC		 2553 data->cancelled = false;
2554 data->is_recover = false;
3b65a30d
FI		 2555 if (!ctx) {
2556 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1, 1);
a7a3b1e9 2557 data->is_recover = true;
67e7b52d 2558 task_setup_data.flags |= RPC_TASK_TIMEOUT;
2409a976 2559 } else {
3b65a30d 2560 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1, 0);
2409a976
FI		 2561 pnfs_lgopen_prepare(data, ctx);
2562 }
c970aa85 2563 task = rpc_run_task(&task_setup_data);
d9b67e1e
AS		 2564 if (IS_ERR(task))
2565 return PTR_ERR(task);
820bf85c 2566 status = rpc_wait_for_completion_task(task);
d9b67e1e 2567 if (status != 0) {
a7a3b1e9 2568 data->cancelled = true;
d9b67e1e
AS		 2569 smp_wmb();
2570 } else
2571 status = data->rpc_status;
2572 rpc_put_task(task);
b257957e
AB		 2573
2574 return status;
2575}
2576
2577static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
2578{
2b0143b5 2579 struct inode *dir = d_inode(data->dir);
b257957e 2580 struct nfs_openres *o_res = &data->o_res;
d9b67e1e 2581 int status;
b257957e 2582
3b65a30d 2583 status = nfs4_run_open_task(data, NULL);
b257957e
AB		 2584 if (status != 0 || !data->rpc_done)
2585 return status;
2586
6926afd1
TM		 2587 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
2588
d7e98258 2589 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM)
b257957e 2590 status = _nfs4_proc_open_confirm(data);
b257957e
AB		 2591
2592 return status;
2593}
2594
f3792d63
TM		 2595/*
2596 * Additional permission checks in order to distinguish between an
2597 * open for read, and an open for execute. This works around the
2598 * fact that NFSv4 OPEN treats read and execute permissions as being
2599 * the same.
2600 * Note that in the non-execute case, we want to turn off permission
2601 * checking if we just created a new file (POSIX open() semantics).
2602 */
a52458b4 2603static int nfs4_opendata_access(const struct cred *cred,
6168f62c 2604 struct nfs4_opendata *opendata,
f8d9a897
WAA		 2605 struct nfs4_state *state, fmode_t fmode,
2606 int openflags)
6168f62c
WAA		 2607{
2608 struct nfs_access_entry cache;
1e6f2095 2609 u32 mask, flags;
6168f62c
WAA		 2610
2611 /* access call failed or for some reason the server doesn't
2612 * support any access modes -- defer access call until later */
2613 if (opendata->o_res.access_supported == 0)
2614 return 0;
2615
2616 mask = 0;
f3792d63
TM		 2617 /*
2618 * Use openflags to check for exec, because fmode won't
2619 * always have FMODE_EXEC set when file open for exec.
2620 */
f8d9a897
WAA		 2621 if (openflags & __FMODE_EXEC) {
2622 /* ONLY check for exec rights */
1e6f2095
AS		 2623 if (S_ISDIR(state->inode->i_mode))
2624 mask = NFS4_ACCESS_LOOKUP;
2625 else
2626 mask = NFS4_ACCESS_EXECUTE;
f3792d63 2627 } else if ((fmode & FMODE_READ) && !opendata->file_created)
1e6f2095 2628 mask = NFS4_ACCESS_READ;
6168f62c
WAA		 2629
2630 cache.cred = cred;
6168f62c
WAA		 2631 nfs_access_set_mask(&cache, opendata->o_res.access_result);
2632 nfs_access_add_cache(state->inode, &cache);
2633
1e6f2095
AS		 2634 flags = NFS4_ACCESS_READ | NFS4_ACCESS_EXECUTE | NFS4_ACCESS_LOOKUP;
2635 if ((mask & ~cache.mask & flags) == 0)
6168f62c
WAA		 2636 return 0;
2637
998f40b5 2638 return -EACCES;
6168f62c
WAA		 2639}
2640
b257957e
AB		 2641/*
2642 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2643 */
3b65a30d
FI		 2644static int _nfs4_proc_open(struct nfs4_opendata *data,
2645 struct nfs_open_context *ctx)
b257957e 2646{
2b0143b5 2647 struct inode *dir = d_inode(data->dir);
b257957e
AB		 2648 struct nfs_server *server = NFS_SERVER(dir);
2649 struct nfs_openargs *o_arg = &data->o_arg;
2650 struct nfs_openres *o_res = &data->o_res;
2651 int status;
2652
3b65a30d 2653 status = nfs4_run_open_task(data, ctx);
08ef7bd3
TM		 2654 if (!data->rpc_done)
2655 return status;
2656 if (status != 0) {
2657 if (status == -NFS4ERR_BADNAME &&
2658 !(o_arg->open_flags & O_CREAT))
2659 return -ENOENT;
24ac23ab 2660 return status;
08ef7bd3 2661 }
24ac23ab 2662
6926afd1
TM		 2663 nfs_fattr_map_and_free_names(server, &data->f_attr);
2664
5bc2afc2 2665 if (o_arg->open_flags & O_CREAT) {
5bc2afc2 2666 if (o_arg->open_flags & O_EXCL)
a7a3b1e9 2667 data->file_created = true;
5bc2afc2 2668 else if (o_res->cinfo.before != o_res->cinfo.after)
a7a3b1e9 2669 data->file_created = true;
1eb5d98f
JL		 2670 if (data->file_created ||
2671 inode_peek_iversion_raw(dir) != o_res->cinfo.after)
1b523ca9
FL		 2672 nfs4_update_changeattr(dir, &o_res->cinfo,
2673 o_res->f_attr->time_start,
2674 NFS_INO_INVALID_DATA);
5bc2afc2 2675 }
0df5dd4a
TM		 2676 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2677 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 2678 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 2679 status = _nfs4_proc_open_confirm(data);
1da177e4 2680 if (status != 0)
24ac23ab 2681 return status;
1da177e4 2682 }
56e0d71e
TM		 2683 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR)) {
2684 nfs4_sequence_free_slot(&o_res->seq_res);
a841b54d
TM		 2685 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr,
2686 o_res->f_label, NULL);
56e0d71e 2687 }
24ac23ab 2688 return 0;
1da177e4
LT		 2689}
2690
1da177e4
LT		 2691/*
2692 * OPEN_EXPIRED:
2693 * reclaim state on the server after a network partition.
2694 * Assumes caller holds the appropriate lock
2695 */
539cd03a 2696static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 2697{
e56e0b78 2698 struct nfs4_opendata *opendata;
864472e9 2699 int ret;
1da177e4 2700
4a1c0893 2701 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 2702 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 2703 if (IS_ERR(opendata))
2704 return PTR_ERR(opendata);
864472e9 2705 ret = nfs4_open_recover(opendata, state);
35d05778 2706 if (ret == -ESTALE)
3d4ff43d 2707 d_drop(ctx->dentry);
c6d00e63 2708 nfs4_opendata_put(opendata);
864472e9 2709 return ret;
1da177e4
LT		 2710}
2711
a9ed2e25 2712static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 2713{
539cd03a 2714 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 2715 struct nfs4_exception exception = { };
2716 int err;
2717
2718 do {
539cd03a 2719 err = _nfs4_open_expired(ctx, state);
42113a75 2720 trace_nfs4_open_expired(ctx, 0, err);
49f9a0fa
TM		 2721 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2722 continue;
a9ed2e25
TM		 2723 switch (err) {
2724 default:
2725 goto out;
2726 case -NFS4ERR_GRACE:
2727 case -NFS4ERR_DELAY:
2728 nfs4_handle_exception(server, err, &exception);
2729 err = 0;
2730 }
202b50dc 2731 } while (exception.retry);
a9ed2e25 2732out:
202b50dc
TM		 2733 return err;
2734}
2735
1da177e4
LT		 2736static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2737{
1da177e4 2738 struct nfs_open_context *ctx;
864472e9 2739 int ret;
1da177e4 2740
864472e9
TM		 2741 ctx = nfs4_state_find_open_context(state);
2742 if (IS_ERR(ctx))
91876b13 2743 return -EAGAIN;
539cd03a 2744 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 2745 put_nfs_open_context(ctx);
2746 return ret;
1da177e4
LT		 2747}
2748
41020b67
TM		 2749static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state,
2750 const nfs4_stateid *stateid)
4dfd4f7a 2751{
41020b67 2752 nfs_remove_bad_delegation(state->inode, stateid);
9f0c5124 2753 nfs_state_clear_delegation(state);
4dfd4f7a
TM		 2754}
2755
2756static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
2757{
2758 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
41020b67 2759 nfs_finish_clear_delegation_stateid(state, NULL);
4dfd4f7a
TM		 2760}
2761
2762static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2763{
2764 /* NFSv4.0 doesn't allow for delegation recovery on open expire */
2765 nfs40_clear_delegation_stateid(state);
27a30cf6 2766 nfs_state_clear_open_state_flags(state);
4dfd4f7a
TM		 2767 return nfs4_open_expired(sp, state);
2768}
2769
45870d69
TM		 2770static int nfs40_test_and_free_expired_stateid(struct nfs_server *server,
2771 nfs4_stateid *stateid,
a52458b4 2772 const struct cred *cred)
45870d69
TM		 2773{
2774 return -NFS4ERR_BAD_STATEID;
2775}
2776
f062eb6c 2777#if defined(CONFIG_NFS_V4_1)
4586f6e2
TM		 2778static int nfs41_test_and_free_expired_stateid(struct nfs_server *server,
2779 nfs4_stateid *stateid,
a52458b4 2780 const struct cred *cred)
4586f6e2
TM		 2781{
2782 int status;
2783
f7a62ada
TM		 2784 switch (stateid->type) {
2785 default:
2786 break;
2787 case NFS4_INVALID_STATEID_TYPE:
2788 case NFS4_SPECIAL_STATEID_TYPE:
2789 return -NFS4ERR_BAD_STATEID;
2790 case NFS4_REVOKED_STATEID_TYPE:
2791 goto out_free;
2792 }
4586f6e2 2793
f7a62ada 2794 status = nfs41_test_stateid(server, stateid, cred);
4586f6e2
TM		 2795 switch (status) {
2796 case -NFS4ERR_EXPIRED:
2797 case -NFS4ERR_ADMIN_REVOKED:
2798 case -NFS4ERR_DELEG_REVOKED:
f7a62ada
TM		 2799 break;
2800 default:
4586f6e2
TM		 2801 return status;
2802 }
f7a62ada
TM		 2803out_free:
2804 /* Ack the revoked state to the server */
f0b0bf88 2805 nfs41_free_stateid(server, stateid, cred, true);
f7a62ada 2806 return -NFS4ERR_EXPIRED;
4586f6e2
TM		 2807}
2808
27a30cf6 2809static int nfs41_check_delegation_stateid(struct nfs4_state *state)
f062eb6c 2810{
f062eb6c 2811 struct nfs_server *server = NFS_SERVER(state->inode);
0c116cad 2812 nfs4_stateid stateid;
ab7cb0df 2813 struct nfs_delegation *delegation;
a52458b4 2814 const struct cred *cred = NULL;
27a30cf6 2815 int status, ret = NFS_OK;
3e60ffdd 2816
ab7cb0df
TM		 2817 /* Get the delegation credential for use by test/free_stateid */
2818 rcu_read_lock();
2819 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
0c116cad 2820 if (delegation == NULL) {
ab7cb0df 2821 rcu_read_unlock();
9f0c5124 2822 nfs_state_clear_delegation(state);
27a30cf6 2823 return NFS_OK;
0c116cad
TM		 2824 }
2825
fc51b1cf 2826 spin_lock(&delegation->lock);
0c116cad 2827 nfs4_stateid_copy(&stateid, &delegation->stateid);
0c116cad 2828
994b15b9
TM		 2829 if (!test_and_clear_bit(NFS_DELEGATION_TEST_EXPIRED,
2830 &delegation->flags)) {
fc51b1cf 2831 spin_unlock(&delegation->lock);
4c8e5447 2832 rcu_read_unlock();
27a30cf6 2833 return NFS_OK;
4c8e5447 2834 }
0c116cad 2835
a52458b4
N		 2836 if (delegation->cred)
2837 cred = get_cred(delegation->cred);
fc51b1cf 2838 spin_unlock(&delegation->lock);
0c116cad 2839 rcu_read_unlock();
4586f6e2 2840 status = nfs41_test_and_free_expired_stateid(server, &stateid, cred);
0c116cad 2841 trace_nfs4_test_delegation_stateid(state, NULL, status);
f7a62ada 2842 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID)
41020b67 2843 nfs_finish_clear_delegation_stateid(state, &stateid);
27a30cf6
TM		 2844 else
2845 ret = status;
ab7cb0df 2846
8c39a39e 2847 put_cred(cred);
27a30cf6
TM		 2848 return ret;
2849}
2850
2851static void nfs41_delegation_recover_stateid(struct nfs4_state *state)
2852{
2853 nfs4_stateid tmp;
2854
2855 if (test_bit(NFS_DELEGATED_STATE, &state->flags) &&
2856 nfs4_copy_delegation_stateid(state->inode, state->state,
2857 &tmp, NULL) &&
2858 nfs4_stateid_match_other(&state->stateid, &tmp))
2859 nfs_state_set_delegation(state, &tmp, state->state);
2860 else
2861 nfs_state_clear_delegation(state);
3e60ffdd
CL		 2862}
2863
c5896fc8
TM		 2864/**
2865 * nfs41_check_expired_locks - possibly free a lock stateid
2866 *
2867 * @state: NFSv4 state for an inode
2868 *
2869 * Returns NFS_OK if recovery for this stateid is now finished.
2870 * Otherwise a negative NFS4ERR value is returned.
2871 */
2872static int nfs41_check_expired_locks(struct nfs4_state *state)
2873{
2874 int status, ret = NFS_OK;
d75a6a0e 2875 struct nfs4_lock_state *lsp, *prev = NULL;
c5896fc8
TM		 2876 struct nfs_server *server = NFS_SERVER(state->inode);
2877
2878 if (!test_bit(LK_STATE_IN_USE, &state->flags))
2879 goto out;
d75a6a0e
BC		 2880
2881 spin_lock(&state->state_lock);
c5896fc8
TM		 2882 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
2883 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
a52458b4 2884 const struct cred *cred = lsp->ls_state->owner->so_cred;
c5896fc8 2885
194bc1f4 2886 refcount_inc(&lsp->ls_count);
d75a6a0e
BC		 2887 spin_unlock(&state->state_lock);
2888
2889 nfs4_put_lock_state(prev);
2890 prev = lsp;
2891
c5896fc8
TM		 2892 status = nfs41_test_and_free_expired_stateid(server,
2893 &lsp->ls_stateid,
2894 cred);
2895 trace_nfs4_test_lock_stateid(state, lsp, status);
2896 if (status == -NFS4ERR_EXPIRED ||
2897 status == -NFS4ERR_BAD_STATEID) {
2898 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
67dd4830 2899 lsp->ls_stateid.type = NFS4_INVALID_STATEID_TYPE;
c5896fc8
TM		 2900 if (!recover_lost_locks)
2901 set_bit(NFS_LOCK_LOST, &lsp->ls_flags);
2902 } else if (status != NFS_OK) {
2903 ret = status;
d75a6a0e
BC		 2904 nfs4_put_lock_state(prev);
2905 goto out;
c5896fc8 2906 }
d75a6a0e 2907 spin_lock(&state->state_lock);
c5896fc8 2908 }
d75a6a0e
BC		 2909 }
2910 spin_unlock(&state->state_lock);
2911 nfs4_put_lock_state(prev);
c5896fc8
TM		 2912out:
2913 return ret;
2914}
2915
3e60ffdd
CL		 2916/**
2917 * nfs41_check_open_stateid - possibly free an open stateid
2918 *
2919 * @state: NFSv4 state for an inode
2920 *
2921 * Returns NFS_OK if recovery for this stateid is now finished.
2922 * Otherwise a negative NFS4ERR value is returned.
2923 */
2924static int nfs41_check_open_stateid(struct nfs4_state *state)
2925{
2926 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 2927 nfs4_stateid *stateid = &state->open_stateid;
a52458b4 2928 const struct cred *cred = state->owner->so_cred;
3e60ffdd
CL		 2929 int status;
2930
27a30cf6 2931 if (test_bit(NFS_OPEN_STATE, &state->flags) == 0)
3e60ffdd 2932 return -NFS4ERR_BAD_STATEID;
4586f6e2 2933 status = nfs41_test_and_free_expired_stateid(server, stateid, cred);
08cb47fa 2934 trace_nfs4_test_open_stateid(state, NULL, status);
f7a62ada 2935 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID) {
27a30cf6 2936 nfs_state_clear_open_state_flags(state);
67dd4830 2937 stateid->type = NFS4_INVALID_STATEID_TYPE;
8a64c4ef 2938 return status;
c0ca0e59 2939 }
8a64c4ef
TM		 2940 if (nfs_open_stateid_recover_openmode(state))
2941 return -NFS4ERR_OPENMODE;
2942 return NFS_OK;
b01dd1d8
BS		 2943}
2944
2945static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2946{
eb64cf96 2947 int status;
b01dd1d8 2948
27a30cf6
TM		 2949 status = nfs41_check_delegation_stateid(state);
2950 if (status != NFS_OK)
2951 return status;
2952 nfs41_delegation_recover_stateid(state);
2953
c5896fc8
TM		 2954 status = nfs41_check_expired_locks(state);
2955 if (status != NFS_OK)
2956 return status;
3e60ffdd 2957 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 2958 if (status != NFS_OK)
2959 status = nfs4_open_expired(sp, state);
2960 return status;
f062eb6c
BS		 2961}
2962#endif
2963
aa53ed54
JL		 2964/*
2965 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2966 * fields corresponding to attributes that were used to store the verifier.
2967 * Make sure we clobber those fields in the later setattr call
2968 */
609339c1 2969static unsigned nfs4_exclusive_attrset(struct nfs4_opendata *opendata,
5334c5bd 2970 struct iattr *sattr, struct nfs4_label **label)
aa53ed54 2971{
609339c1
TM		 2972 const __u32 *bitmask = opendata->o_arg.server->exclcreat_bitmask;
2973 __u32 attrset[3];
2974 unsigned ret;
2975 unsigned i;
5334c5bd 2976
609339c1
TM		 2977 for (i = 0; i < ARRAY_SIZE(attrset); i++) {
2978 attrset[i] = opendata->o_res.attrset[i];
2979 if (opendata->o_arg.createmode == NFS4_CREATE_EXCLUSIVE4_1)
2980 attrset[i] &= ~bitmask[i];
2981 }
2982
2983 ret = (opendata->o_arg.createmode == NFS4_CREATE_EXCLUSIVE) ?
2984 sattr->ia_valid : 0;
aa53ed54 2985
609339c1
TM		 2986 if ((attrset[1] & (FATTR4_WORD1_TIME_ACCESS|FATTR4_WORD1_TIME_ACCESS_SET))) {
2987 if (sattr->ia_valid & ATTR_ATIME_SET)
2988 ret |= ATTR_ATIME_SET;
2989 else
2990 ret |= ATTR_ATIME;
2991 }
5334c5bd 2992
609339c1
TM		 2993 if ((attrset[1] & (FATTR4_WORD1_TIME_MODIFY|FATTR4_WORD1_TIME_MODIFY_SET))) {
2994 if (sattr->ia_valid & ATTR_MTIME_SET)
2995 ret |= ATTR_MTIME_SET;
2996 else
2997 ret |= ATTR_MTIME;
2998 }
5334c5bd 2999
609339c1 3000 if (!(attrset[2] & FATTR4_WORD2_SECURITY_LABEL))
5334c5bd 3001 *label = NULL;
609339c1 3002 return ret;
aa53ed54
JL		 3003}
3004
c21443c2 3005static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
1bf85d8c 3006 int flags, struct nfs_open_context *ctx)
c21443c2
TM		 3007{
3008 struct nfs4_state_owner *sp = opendata->owner;
3009 struct nfs_server *server = sp->so_server;
275bb307 3010 struct dentry *dentry;
c21443c2 3011 struct nfs4_state *state;
1bf85d8c 3012 fmode_t acc_mode = _nfs4_ctx_to_accessmode(ctx);
cf5b4059
TM		 3013 struct inode *dir = d_inode(opendata->dir);
3014 unsigned long dir_verifier;
c21443c2
TM		 3015 unsigned int seq;
3016 int ret;
3017
3018 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
cf5b4059 3019 dir_verifier = nfs_save_change_attribute(dir);
c21443c2 3020
3b65a30d 3021 ret = _nfs4_proc_open(opendata, ctx);
dca78001 3022 if (ret != 0)
c21443c2
TM		 3023 goto out;
3024
ae55e59d 3025 state = _nfs4_opendata_to_nfs4_state(opendata);
c21443c2
TM		 3026 ret = PTR_ERR(state);
3027 if (IS_ERR(state))
3028 goto out;
a974deee 3029 ctx->state = state;
c21443c2
TM		 3030 if (server->caps & NFS_CAP_POSIX_LOCK)
3031 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
a8ce377a
JL		 3032 if (opendata->o_res.rflags & NFS4_OPEN_RESULT_MAY_NOTIFY_LOCK)
3033 set_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags);
c21443c2 3034
275bb307 3035 dentry = opendata->dentry;
2b0143b5 3036 if (d_really_is_negative(dentry)) {
668d0cd5 3037 struct dentry *alias;
275bb307 3038 d_drop(dentry);
668d0cd5
AV		 3039 alias = d_exact_alias(dentry, state->inode);
3040 if (!alias)
3041 alias = d_splice_alias(igrab(state->inode), dentry);
3042 /* d_splice_alias() can't fail here - it's a non-directory */
3043 if (alias) {
275bb307 3044 dput(ctx->dentry);
668d0cd5 3045 ctx->dentry = dentry = alias;
275bb307 3046 }
cf5b4059
TM		 3047 }
3048
3049 switch(opendata->o_arg.claim) {
3050 default:
3051 break;
3052 case NFS4_OPEN_CLAIM_NULL:
3053 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
3054 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
3055 if (!opendata->rpc_done)
3056 break;
3057 if (opendata->o_res.delegation_type != 0)
3058 dir_verifier = nfs_save_change_attribute(dir);
3059 nfs_set_verifier(dentry, dir_verifier);
275bb307
TM		 3060 }
3061
af9b6d75
TM		 3062 /* Parse layoutget results before we check for access */
3063 pnfs_parse_lgopen(state->inode, opendata->lgp, ctx);
3064
1bf85d8c
TM		 3065 ret = nfs4_opendata_access(sp->so_cred, opendata, state,
3066 acc_mode, flags);
c21443c2
TM		 3067 if (ret != 0)
3068 goto out;
3069
2b0143b5 3070 if (d_inode(dentry) == state->inode) {
c45ffdd2
TM		 3071 nfs_inode_attach_open_context(ctx);
3072 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
3073 nfs4_schedule_stateid_recovery(server, state);
3074 }
2409a976 3075
c21443c2 3076out:
0cb98abb
OK		 3077 if (!opendata->cancelled)
3078 nfs4_sequence_free_slot(&opendata->o_res.seq_res);
c21443c2
TM		 3079 return ret;
3080}
3081
1da177e4 3082/*
24ac23ab 3083 * Returns a referenced nfs4_state
1da177e4 3084 */
82be417a 3085static int _nfs4_do_open(struct inode *dir,
4197a055 3086 struct nfs_open_context *ctx,
82be417a 3087 int flags,
8fd1ab74 3088 const struct nfs4_open_createattrs *c,
5bc2afc2 3089 int *opened)
1da177e4
LT		 3090{
3091 struct nfs4_state_owner *sp;
3092 struct nfs4_state *state = NULL;
3093 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 3094 struct nfs4_opendata *opendata;
4197a055 3095 struct dentry *dentry = ctx->dentry;
a52458b4 3096 const struct cred *cred = ctx->cred;
4197a055 3097 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
1bf85d8c 3098 fmode_t fmode = _nfs4_ctx_to_openmode(ctx);
49f9a0fa 3099 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
8fd1ab74
TM		 3100 struct iattr *sattr = c->sattr;
3101 struct nfs4_label *label = c->label;
1775fd3e 3102 struct nfs4_label *olabel = NULL;
aac00a8d 3103 int status;
1da177e4
LT		 3104
3105 /* Protect against reboot recovery conflicts */
1da177e4 3106 status = -ENOMEM;
d1e284d5
TM		 3107 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
3108 if (sp == NULL) {
1da177e4
LT		 3109 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
3110 goto out_err;
3111 }
334f87dd 3112 status = nfs4_client_recover_expired_lease(server->nfs_client);
58d9714a 3113 if (status != 0)
b4454fe1 3114 goto err_put_state_owner;
2b0143b5
DH		 3115 if (d_really_is_positive(dentry))
3116 nfs4_return_incompatible_delegation(d_inode(dentry), fmode);
58d9714a 3117 status = -ENOMEM;
2b0143b5 3118 if (d_really_is_positive(dentry))
49f9a0fa 3119 claim = NFS4_OPEN_CLAIM_FH;
8fd1ab74
TM		 3120 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags,
3121 c, claim, GFP_KERNEL);
e56e0b78 3122 if (opendata == NULL)
95d35cb4 3123 goto err_put_state_owner;
1da177e4 3124
14c43f76
DQ		 3125 if (label) {
3126 olabel = nfs4_label_alloc(server, GFP_KERNEL);
3127 if (IS_ERR(olabel)) {
3128 status = PTR_ERR(olabel);
3129 goto err_opendata_put;
3130 }
3131 }
3132
e911b815
TM		 3133 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
3134 if (!opendata->f_attr.mdsthreshold) {
3135 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
3136 if (!opendata->f_attr.mdsthreshold)
3137 goto err_free_label;
3138 }
1549210f 3139 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 3140 }
2b0143b5
DH		 3141 if (d_really_is_positive(dentry))
3142 opendata->state = nfs4_get_open_state(d_inode(dentry), sp);
aac00a8d 3143
1bf85d8c 3144 status = _nfs4_open_and_get_state(opendata, flags, ctx);
6168f62c 3145 if (status != 0)
14c43f76 3146 goto err_free_label;
3efb9722 3147 state = ctx->state;
6168f62c 3148
efcbc04e 3149 if ((opendata->o_arg.open_flags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) &&
549b19cc 3150 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
609339c1 3151 unsigned attrs = nfs4_exclusive_attrset(opendata, sattr, &label);
a1d1c4f1
TM		 3152 /*
3153 * send create attributes which was not set by open
3154 * with an extra setattr.
3155 */
609339c1
TM		 3156 if (attrs || label) {
3157 unsigned ia_old = sattr->ia_valid;
3158
3159 sattr->ia_valid = attrs;
a1d1c4f1
TM		 3160 nfs_fattr_init(opendata->o_res.f_attr);
3161 status = nfs4_do_setattr(state->inode, cred,
3162 opendata->o_res.f_attr, sattr,
29b59f94 3163 ctx, label, olabel);
a1d1c4f1
TM		 3164 if (status == 0) {
3165 nfs_setattr_update_inode(state->inode, sattr,
3166 opendata->o_res.f_attr);
3167 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
3168 }
609339c1 3169 sattr->ia_valid = ia_old;
1775fd3e 3170 }
0ab64e0e 3171 }
c5c3fb5f 3172 if (opened && opendata->file_created)
73a09dd9 3173 *opened = 1;
82be417a 3174
e911b815 3175 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
82be417a 3176 *ctx_th = opendata->f_attr.mdsthreshold;
e911b815
TM		 3177 opendata->f_attr.mdsthreshold = NULL;
3178 }
82be417a 3179
14c43f76
DQ		 3180 nfs4_label_free(olabel);
3181
c6d00e63 3182 nfs4_opendata_put(opendata);
1da177e4 3183 nfs4_put_state_owner(sp);
1da177e4 3184 return 0;
14c43f76
DQ		 3185err_free_label:
3186 nfs4_label_free(olabel);
c6d00e63
TM		 3187err_opendata_put:
3188 nfs4_opendata_put(opendata);
e56e0b78
TM		 3189err_put_state_owner:
3190 nfs4_put_state_owner(sp);
1da177e4 3191out_err:
1da177e4
LT		 3192 return status;
3193}
3194
3195
82be417a 3196static struct nfs4_state *nfs4_do_open(struct inode *dir,
4197a055 3197 struct nfs_open_context *ctx,
82be417a
AA		 3198 int flags,
3199 struct iattr *sattr,
5bc2afc2
TM		 3200 struct nfs4_label *label,
3201 int *opened)
1da177e4 3202{
49f9a0fa 3203 struct nfs_server *server = NFS_SERVER(dir);
0688e64b
TM		 3204 struct nfs4_exception exception = {
3205 .interruptible = true,
3206 };
1da177e4 3207 struct nfs4_state *res;
8fd1ab74
TM		 3208 struct nfs4_open_createattrs c = {
3209 .label = label,
3210 .sattr = sattr,
3211 .verf = {
3212 [0] = (__u32)jiffies,
3213 [1] = (__u32)current->pid,
3214 },
3215 };
1da177e4
LT		 3216 int status;
3217
3218 do {
8fd1ab74 3219 status = _nfs4_do_open(dir, ctx, flags, &c, opened);
3efb9722 3220 res = ctx->state;
42113a75 3221 trace_nfs4_open_file(ctx, flags, status);
1da177e4
LT		 3222 if (status == 0)
3223 break;
3224 /* NOTE: BAD_SEQID means the server and client disagree about the
3225 * book-keeping w.r.t. state-changing operations
3226 * (OPEN/CLOSE/LOCK/LOCKU...)
3227 * It is actually a sign of a bug on the client or on the server.
3228 *
3229 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 3230 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 3231 * have unhashed the old state_owner for us, and that we can
3232 * therefore safely retry using a new one. We should still warn
3233 * the user though...
3234 */
3235 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 3236 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 3237 " returned a bad sequence-id error!\n",
3238 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 3239 exception.retry = 1;
3240 continue;
3241 }
550f5747
TM		 3242 /*
3243 * BAD_STATEID on OPEN means that the server cancelled our
3244 * state before it received the OPEN_CONFIRM.
3245 * Recover by retrying the request as per the discussion
3246 * on Page 181 of RFC3530.
3247 */
3248 if (status == -NFS4ERR_BAD_STATEID) {
3249 exception.retry = 1;
3250 continue;
3251 }
924491f2
RM		 3252 if (status == -NFS4ERR_EXPIRED) {
3253 nfs4_schedule_lease_recovery(server->nfs_client);
3254 exception.retry = 1;
3255 continue;
3256 }
aac00a8d
TM		 3257 if (status == -EAGAIN) {
3258 /* We must have found a delegation */
3259 exception.retry = 1;
3260 continue;
3261 }
49f9a0fa
TM		 3262 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
3263 continue;
3264 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 3265 status, &exception));
3266 } while (exception.retry);
3267 return res;
3268}
3269
8487c479
TM		 3270static int _nfs4_do_setattr(struct inode *inode,
3271 struct nfs_setattrargs *arg,
3272 struct nfs_setattrres *res,
a52458b4 3273 const struct cred *cred,
29b59f94 3274 struct nfs_open_context *ctx)
1da177e4 3275{
3e4f6290 3276 struct nfs_server *server = NFS_SERVER(inode);
d9b67e1e 3277 struct rpc_message msg = {
659bfcd6 3278 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
8487c479
TM		 3279 .rpc_argp = arg,
3280 .rpc_resp = res,
659bfcd6 3281 .rpc_cred = cred,
d9b67e1e 3282 };
a52458b4 3283 const struct cred *delegation_cred = NULL;
26e976a8 3284 unsigned long timestamp = jiffies;
ee3ae84e 3285 bool truncate;
65e4308d 3286 int status;
1da177e4 3287
8487c479 3288 nfs_fattr_init(res->fattr);
1da177e4 3289
ee3ae84e 3290 /* Servers should only apply open mode checks for file size changes */
8487c479 3291 truncate = (arg->iap->ia_valid & ATTR_SIZE) ? true : false;
644c9f40
CL		 3292 if (!truncate) {
3293 nfs4_inode_make_writeable(inode);
991eedb1 3294 goto zero_stateid;
644c9f40 3295 }
ee3ae84e 3296
991eedb1 3297 if (nfs4_copy_delegation_stateid(inode, FMODE_WRITE, &arg->stateid, &delegation_cred)) {
ee3ae84e 3298 /* Use that stateid */
09a54f0e 3299 } else if (ctx != NULL && ctx->state) {
17393475 3300 struct nfs_lock_context *l_ctx;
29b59f94 3301 if (!nfs4_valid_open_stateid(ctx->state))
0418dae1 3302 return -EBADF;
17393475
N		 3303 l_ctx = nfs_get_lock_context(ctx);
3304 if (IS_ERR(l_ctx))
3305 return PTR_ERR(l_ctx);
7a0566b3
N		 3306 status = nfs4_select_rw_stateid(ctx->state, FMODE_WRITE, l_ctx,
3307 &arg->stateid, &delegation_cred);
3308 nfs_put_lock_context(l_ctx);
3309 if (status == -EIO)
0418dae1 3310 return -EBADF;
d826e5b8
OK		 3311 else if (status == -EAGAIN)
3312 goto zero_stateid;
991eedb1
TM		 3313 } else {
3314zero_stateid:
8487c479 3315 nfs4_stateid_copy(&arg->stateid, &zero_stateid);
991eedb1 3316 }
abf4e13c
TM		 3317 if (delegation_cred)
3318 msg.rpc_cred = delegation_cred;
1da177e4 3319
8487c479 3320 status = nfs4_call_sync(server->client, server, &msg, &arg->seq_args, &res->seq_res, 1);
abf4e13c 3321
a52458b4 3322 put_cred(delegation_cred);
29b59f94 3323 if (status == 0 && ctx != NULL)
26e976a8 3324 renew_lease(server, timestamp);
8487c479 3325 trace_nfs4_setattr(inode, &arg->stateid, status);
65e4308d 3326 return status;
1da177e4
LT		 3327}
3328
a52458b4 3329static int nfs4_do_setattr(struct inode *inode, const struct cred *cred,
659bfcd6 3330 struct nfs_fattr *fattr, struct iattr *sattr,
29b59f94 3331 struct nfs_open_context *ctx, struct nfs4_label *ilabel,
1775fd3e 3332 struct nfs4_label *olabel)
1da177e4 3333{
3e4f6290 3334 struct nfs_server *server = NFS_SERVER(inode);
30846df0 3335 __u32 bitmask[NFS4_BITMASK_SZ];
29b59f94 3336 struct nfs4_state *state = ctx ? ctx->state : NULL;
d9b67e1e
AS		 3337 struct nfs_setattrargs arg = {
3338 .fh = NFS_FH(inode),
3339 .iap = sattr,
8487c479 3340 .server = server,
30846df0 3341 .bitmask = bitmask,
8487c479 3342 .label = ilabel,
d9b67e1e
AS		 3343 };
3344 struct nfs_setattrres res = {
8487c479
TM		 3345 .fattr = fattr,
3346 .label = olabel,
3347 .server = server,
d9b67e1e 3348 };
a1d0b5ee
TM		 3349 struct nfs4_exception exception = {
3350 .state = state,
3114ea7a 3351 .inode = inode,
8487c479 3352 .stateid = &arg.stateid,
a1d0b5ee 3353 };
1da177e4 3354 int err;
8487c479 3355
1da177e4 3356 do {
30846df0
TM		 3357 nfs4_bitmap_copy_adjust_setattr(bitmask,
3358 nfs4_bitmask(server, olabel),
3359 inode);
3360
29b59f94 3361 err = _nfs4_do_setattr(inode, &arg, &res, cred, ctx);
451146be
TM		 3362 switch (err) {
3363 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 3364 if (!(sattr->ia_valid & ATTR_SIZE)) {
3365 pr_warn_once("NFSv4: server %s is incorrectly "
3366 "applying open mode checks to "
3367 "a SETATTR that is not "
3368 "changing file size.\n",
3369 server->nfs_client->cl_hostname);
3370 }
451146be
TM		 3371 if (state && !(state->state & FMODE_WRITE)) {
3372 err = -EBADF;
3373 if (sattr->ia_valid & ATTR_OPEN)
3374 err = -EACCES;
3375 goto out;
3376 }
3377 }
3378 err = nfs4_handle_exception(server, err, &exception);
1da177e4 3379 } while (exception.retry);
451146be 3380out:
1da177e4
LT		 3381 return err;
3382}
3383
500d701f
PT		 3384static bool
3385nfs4_wait_on_layoutreturn(struct inode *inode, struct rpc_task *task)
3386{
3387 if (inode == NULL || !nfs_have_layout(inode))
3388 return false;
3389
3390 return pnfs_wait_on_layoutreturn(inode, task);
3391}
3392
0e0cb35b
TM		 3393/*
3394 * Update the seqid of an open stateid
3395 */
3396static void nfs4_sync_open_stateid(nfs4_stateid *dst,
3397 struct nfs4_state *state)
3398{
3399 __be32 seqid_open;
3400 u32 dst_seqid;
3401 int seq;
3402
3403 for (;;) {
3404 if (!nfs4_valid_open_stateid(state))
3405 break;
3406 seq = read_seqbegin(&state->seqlock);
3407 if (!nfs4_state_match_open_stateid_other(state, dst)) {
3408 nfs4_stateid_copy(dst, &state->open_stateid);
3409 if (read_seqretry(&state->seqlock, seq))
3410 continue;
3411 break;
3412 }
3413 seqid_open = state->open_stateid.seqid;
3414 if (read_seqretry(&state->seqlock, seq))
3415 continue;
3416
3417 dst_seqid = be32_to_cpu(dst->seqid);
3418 if ((s32)(dst_seqid - be32_to_cpu(seqid_open)) < 0)
3419 dst->seqid = seqid_open;
3420 break;
3421 }
3422}
3423
3424/*
3425 * Update the seqid of an open stateid after receiving
3426 * NFS4ERR_OLD_STATEID
3427 */
3428static bool nfs4_refresh_open_old_stateid(nfs4_stateid *dst,
3429 struct nfs4_state *state)
3430{
3431 __be32 seqid_open;
3432 u32 dst_seqid;
3433 bool ret;
b4868b44
BC		 3434 int seq, status = -EAGAIN;
3435 DEFINE_WAIT(wait);
0e0cb35b
TM		 3436
3437 for (;;) {
3438 ret = false;
3439 if (!nfs4_valid_open_stateid(state))
3440 break;
3441 seq = read_seqbegin(&state->seqlock);
3442 if (!nfs4_state_match_open_stateid_other(state, dst)) {
3443 if (read_seqretry(&state->seqlock, seq))
3444 continue;
3445 break;
3446 }
b4868b44
BC		 3447
3448 write_seqlock(&state->seqlock);
0e0cb35b 3449 seqid_open = state->open_stateid.seqid;
0e0cb35b
TM		 3450
3451 dst_seqid = be32_to_cpu(dst->seqid);
b4868b44
BC		 3452
3453 /* Did another OPEN bump the state's seqid? try again: */
3454 if ((s32)(be32_to_cpu(seqid_open) - dst_seqid) > 0) {
0e0cb35b 3455 dst->seqid = seqid_open;
b4868b44
BC		 3456 write_sequnlock(&state->seqlock);
3457 ret = true;
3458 break;
3459 }
3460
3461 /* server says we're behind but we haven't seen the update yet */
3462 set_bit(NFS_STATE_CHANGE_WAIT, &state->flags);
3463 prepare_to_wait(&state->waitq, &wait, TASK_KILLABLE);
3464 write_sequnlock(&state->seqlock);
3465 trace_nfs4_close_stateid_update_wait(state->inode, dst, 0);
3466
3467 if (signal_pending(current))
3468 status = -EINTR;
3469 else
3470 if (schedule_timeout(5*HZ) != 0)
3471 status = 0;
3472
3473 finish_wait(&state->waitq, &wait);
3474
3475 if (!status)
3476 continue;
3477 if (status == -EINTR)
3478 break;
3479
3480 /* we slept the whole 5 seconds, we must have lost a seqid */
3481 dst->seqid = cpu_to_be32(dst_seqid + 1);
0e0cb35b
TM		 3482 ret = true;
3483 break;
3484 }
3485
3486 return ret;
3487}
3488
1da177e4
LT		 3489struct nfs4_closedata {
3490 struct inode *inode;
3491 struct nfs4_state *state;
3492 struct nfs_closeargs arg;
3493 struct nfs_closeres res;
cf805165
TM		 3494 struct {
3495 struct nfs4_layoutreturn_args arg;
3496 struct nfs4_layoutreturn_res res;
4d796d75 3497 struct nfs4_xdr_opaque_data ld_private;
cf805165
TM		 3498 u32 roc_barrier;
3499 bool roc;
3500 } lr;
516a6af6 3501 struct nfs_fattr fattr;
26e976a8 3502 unsigned long timestamp;
1da177e4
LT		 3503};
3504
963d8fe5 3505static void nfs4_free_closedata(void *data)
9512135d 3506{
963d8fe5
TM		 3507 struct nfs4_closedata *calldata = data;
3508 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 3509 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 3510
cf805165 3511 if (calldata->lr.roc)
1c5bd76d
TM		 3512 pnfs_roc_release(&calldata->lr.arg, &calldata->lr.res,
3513 calldata->res.lr_ret);
9512135d
TM		 3514 nfs4_put_open_state(calldata->state);
3515 nfs_free_seqid(calldata->arg.seqid);
9512135d 3516 nfs4_put_state_owner(sp);
322b2b90 3517 nfs_sb_deactive(sb);
9512135d
TM		 3518 kfree(calldata);
3519}
3520
963d8fe5 3521static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 3522{
963d8fe5 3523 struct nfs4_closedata *calldata = data;
1da177e4 3524 struct nfs4_state *state = calldata->state;
1da177e4 3525 struct nfs_server *server = NFS_SERVER(calldata->inode);
412f6c4c 3526 nfs4_stateid *res_stateid = NULL;
b8b8d221
TM		 3527 struct nfs4_exception exception = {
3528 .state = state,
3529 .inode = calldata->inode,
3530 .stateid = &calldata->arg.stateid,
3531 };
1da177e4 3532
a3ca5651 3533 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 3534 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
3535 return;
42113a75 3536 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
cf805165
TM		 3537
3538 /* Handle Layoutreturn errors */
287a9c55
TM		 3539 if (pnfs_roc_done(task, calldata->inode,
3540 &calldata->arg.lr_args,
3541 &calldata->res.lr_res,
3542 &calldata->res.lr_ret) == -EAGAIN)
3543 goto out_restart;
cf805165 3544
d9b67e1e 3545 /* hmm. we are done with the inode, and in the process of freeing
1da177e4
LT		 3546 * the state_owner. we keep this around to process errors
3547 */
1da177e4
LT		 3548 switch (task->tk_status) {
3549 case 0:
412f6c4c 3550 res_stateid = &calldata->res.stateid;
26e976a8 3551 renew_lease(server, calldata->timestamp);
412f6c4c 3552 break;
f07d4a31
TM		 3553 case -NFS4ERR_ACCESS:
3554 if (calldata->arg.bitmask != NULL) {
3555 calldata->arg.bitmask = NULL;
3556 calldata->res.fattr = NULL;
91b30d2e 3557 goto out_restart;
f07d4a31
TM		 3558
3559 }
3560 break;
12f275cd
TM		 3561 case -NFS4ERR_OLD_STATEID:
3562 /* Did we race with OPEN? */
0e0cb35b 3563 if (nfs4_refresh_open_old_stateid(&calldata->arg.stateid,
91b30d2e
TM		 3564 state))
3565 goto out_restart;
12f275cd 3566 goto out_release;
69794ad7 3567 case -NFS4ERR_ADMIN_REVOKED:
1da177e4 3568 case -NFS4ERR_STALE_STATEID:
26d36301
TM		 3569 case -NFS4ERR_EXPIRED:
3570 nfs4_free_revoked_stateid(server,
3571 &calldata->arg.stateid,
3572 task->tk_msg.rpc_cred);
df561f66 3573 fallthrough;
9e33bed5 3574 case -NFS4ERR_BAD_STATEID:
e217e825
TM		 3575 if (calldata->arg.fmode == 0)
3576 break;
df561f66 3577 fallthrough;
1da177e4 3578 default:
b8b8d221
TM		 3579 task->tk_status = nfs4_async_handle_exception(task,
3580 server, task->tk_status, &exception);
3581 if (exception.retry)
91b30d2e 3582 goto out_restart;
1da177e4 3583 }
4a1e2feb
TM		 3584 nfs_clear_open_stateid(state, &calldata->arg.stateid,
3585 res_stateid, calldata->arg.fmode);
69794ad7 3586out_release:
91b30d2e 3587 task->tk_status = 0;
72211dbe 3588 nfs_release_seqid(calldata->arg.seqid);
d8d84983 3589 nfs_refresh_inode(calldata->inode, &calldata->fattr);
a3ca5651 3590 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
91b30d2e 3591 return;
91b30d2e
TM		 3592out_restart:
3593 task->tk_status = 0;
3594 rpc_restart_call_prepare(task);
3595 goto out_release;
1da177e4
LT		 3596}
3597
4ce70ada 3598static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 3599{
4ce70ada 3600 struct nfs4_closedata *calldata = data;
9512135d 3601 struct nfs4_state *state = calldata->state;
7fdab069 3602 struct inode *inode = calldata->inode;
c8bf7073 3603 struct pnfs_layout_hdr *lo;
aee7af35 3604 bool is_rdonly, is_wronly, is_rdwr;
88069f77 3605 int call_close = 0;
9512135d 3606
a3ca5651 3607 dprintk("%s: begin!\n", __func__);
963d8fe5 3608 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 3609 goto out_wait;
003707c7 3610
88069f77 3611 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
4cecb76f 3612 spin_lock(&state->owner->so_lock);
aee7af35
TM		 3613 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
3614 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
3615 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
003707c7 3616 /* Calculate the change in open mode */
cd9288ff 3617 calldata->arg.fmode = 0;
e7616923 3618 if (state->n_rdwr == 0) {
cd9288ff
TM		 3619 if (state->n_rdonly == 0)
3620 call_close |= is_rdonly;
3621 else if (is_rdonly)
3622 calldata->arg.fmode |= FMODE_READ;
3623 if (state->n_wronly == 0)
3624 call_close |= is_wronly;
3625 else if (is_wronly)
3626 calldata->arg.fmode |= FMODE_WRITE;
e547f262
TM		 3627 if (calldata->arg.fmode != (FMODE_READ|FMODE_WRITE))
3628 call_close |= is_rdwr;
cd9288ff
TM		 3629 } else if (is_rdwr)
3630 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
3631
0e0cb35b
TM		 3632 nfs4_sync_open_stateid(&calldata->arg.stateid, state);
3633 if (!nfs4_valid_open_stateid(state))
5d422301 3634 call_close = 0;
4cecb76f 3635 spin_unlock(&state->owner->so_lock);
88069f77
TM		 3636
3637 if (!call_close) {
963d8fe5 3638 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 3639 goto out_no_action;
9512135d 3640 }
88069f77 3641
1c5bd76d 3642 if (!calldata->lr.roc && nfs4_wait_on_layoutreturn(inode, task)) {
500d701f
PT		 3643 nfs_release_seqid(calldata->arg.seqid);
3644 goto out_wait;
3645 }
3646
c8bf7073
TM		 3647 lo = calldata->arg.lr_args ? calldata->arg.lr_args->layout : NULL;
3648 if (lo && !pnfs_layout_is_valid(lo)) {
3649 calldata->arg.lr_args = NULL;
3650 calldata->res.lr_res = NULL;
3651 }
3652
9413a1a1 3653 if (calldata->arg.fmode == 0)
88069f77 3654 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
3ecefc92 3655
9413a1a1 3656 if (calldata->arg.fmode == 0 || calldata->arg.fmode == FMODE_READ) {
3ecefc92 3657 /* Close-to-open cache consistency revalidation */
76bd5c01 3658 if (!nfs4_have_delegation(inode, FMODE_READ)) {
3ecefc92 3659 calldata->arg.bitmask = NFS_SERVER(inode)->cache_consistency_bitmask;
76bd5c01
OK		 3660 nfs4_bitmask_adjust(calldata->arg.bitmask, inode, NFS_SERVER(inode), NULL);
3661 } else
3ecefc92
TM		 3662 calldata->arg.bitmask = NULL;
3663 }
3c13cb5b 3664
6ae37339
TM		 3665 calldata->arg.share_access =
3666 nfs4_map_atomic_open_share(NFS_SERVER(inode),
3667 calldata->arg.fmode, 0);
88069f77 3668
d8d84983
TM		 3669 if (calldata->res.fattr == NULL)
3670 calldata->arg.bitmask = NULL;
3671 else if (calldata->arg.bitmask == NULL)
3672 calldata->res.fattr = NULL;
26e976a8 3673 calldata->timestamp = jiffies;
42e1cca7 3674 if (nfs4_setup_sequence(NFS_SERVER(inode)->nfs_client,
9d12b216
TM		 3675 &calldata->arg.seq_args,
3676 &calldata->res.seq_res,
2240a9e2
TM		 3677 task) != 0)
3678 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 3679 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 3680 return;
3681out_no_action:
3682 task->tk_action = NULL;
3683out_wait:
3684 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 3685}
3686
963d8fe5 3687static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 3688 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 3689 .rpc_call_done = nfs4_close_done,
3690 .rpc_release = nfs4_free_closedata,
3691};
3692
1da177e4
LT		 3693/*
3694 * It is possible for data to be read/written from a mem-mapped file
3695 * after the sys_close call (which hits the vfs layer as a flush).
3696 * This means that we can't safely call nfsv4 close on a file until
3697 * the inode is cleared. This in turn means that we are not good
3698 * NFSv4 citizens - we do not indicate to the server to update the file's
3699 * share state even when we are done with one of the three share
3700 * stateid's in the inode.
3701 *
3702 * NOTE: Caller must be holding the sp->so_owner semaphore!
3703 */
1f7977c1 3704int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 3705{
4a35bd41 3706 struct nfs_server *server = NFS_SERVER(state->inode);
63f5f796 3707 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
1da177e4 3708 struct nfs4_closedata *calldata;
b39e625b
TM		 3709 struct nfs4_state_owner *sp = state->owner;
3710 struct rpc_task *task;
5138fde0
TM		 3711 struct rpc_message msg = {
3712 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
3713 .rpc_cred = state->owner->so_cred,
3714 };
c970aa85
TM		 3715 struct rpc_task_setup task_setup_data = {
3716 .rpc_client = server->client,
5138fde0 3717 .rpc_message = &msg,
c970aa85 3718 .callback_ops = &nfs4_close_ops,
101070ca 3719 .workqueue = nfsiod_workqueue,
61296507 3720 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF,
c970aa85 3721 };
9512135d 3722 int status = -ENOMEM;
1da177e4 3723
fa940720
WAA		 3724 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
3725 &task_setup_data.rpc_client, &msg);
3726
8535b2be 3727 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 3728 if (calldata == NULL)
9512135d 3729 goto out;
fba83f34 3730 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1, 0);
4a35bd41 3731 calldata->inode = state->inode;
1da177e4 3732 calldata->state = state;
4a35bd41 3733 calldata->arg.fh = NFS_FH(state->inode);
c82bac6f
TM		 3734 if (!nfs4_copy_open_stateid(&calldata->arg.stateid, state))
3735 goto out_free_calldata;
1da177e4 3736 /* Serialization for the sequence id */
63f5f796
TM		 3737 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
3738 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask);
badc76dd 3739 if (IS_ERR(calldata->arg.seqid))
9512135d 3740 goto out_free_calldata;
d8d84983 3741 nfs_fattr_init(&calldata->fattr);
dc0b027d 3742 calldata->arg.fmode = 0;
4d796d75 3743 calldata->lr.arg.ld_private = &calldata->lr.ld_private;
516a6af6 3744 calldata->res.fattr = &calldata->fattr;
c1d51931 3745 calldata->res.seqid = calldata->arg.seqid;
516a6af6 3746 calldata->res.server = server;
cf805165 3747 calldata->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
1c5bd76d
TM		 3748 calldata->lr.roc = pnfs_roc(state->inode,
3749 &calldata->lr.arg, &calldata->lr.res, msg.rpc_cred);
3750 if (calldata->lr.roc) {
3751 calldata->arg.lr_args = &calldata->lr.arg;
3752 calldata->res.lr_res = &calldata->lr.res;
3753 }
643168c2 3754 nfs_sb_active(calldata->inode->i_sb);
9512135d 3755
1174dd1f
TM		 3756 msg.rpc_argp = &calldata->arg;
3757 msg.rpc_resp = &calldata->res;
c970aa85
TM		 3758 task_setup_data.callback_data = calldata;
3759 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 3760 if (IS_ERR(task))
3761 return PTR_ERR(task);
a49c3c77
TM		 3762 status = 0;
3763 if (wait)
3764 status = rpc_wait_for_completion_task(task);
b39e625b 3765 rpc_put_task(task);
a49c3c77 3766 return status;
9512135d
TM		 3767out_free_calldata:
3768 kfree(calldata);
3769out:
b39e625b
TM		 3770 nfs4_put_open_state(state);
3771 nfs4_put_state_owner(sp);
9512135d 3772 return status;
1da177e4
LT		 3773}
3774
2b484297 3775static struct inode *
5bc2afc2
TM		 3776nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
3777 int open_flags, struct iattr *attr, int *opened)
1da177e4 3778{
1da177e4 3779 struct nfs4_state *state;
aa9c2669
DQ		 3780 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
3781
3782 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
1da177e4 3783
565277f6 3784 /* Protect against concurrent sillydeletes */
5bc2afc2 3785 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
aa9c2669
DQ		 3786
3787 nfs4_label_release_security(label);
3788
f46e0bd3
TM		 3789 if (IS_ERR(state))
3790 return ERR_CAST(state);
275bb307 3791 return state->inode;
1da177e4
LT		 3792}
3793
1185a552 3794static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 3795{
3796 if (ctx->state == NULL)
3797 return;
3798 if (is_sync)
1bf85d8c 3799 nfs4_close_sync(ctx->state, _nfs4_ctx_to_openmode(ctx));
7fe5c398 3800 else
1bf85d8c 3801 nfs4_close_state(ctx->state, _nfs4_ctx_to_openmode(ctx));
7fe5c398 3802}
1da177e4 3803
b944dba3
TM		 3804#define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
3805#define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
b78ef845 3806#define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_XATTR_SUPPORT - 1UL)
b944dba3 3807
1da177e4
LT		 3808static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
3809{
8c61282f 3810 u32 bitmask[3] = {}, minorversion = server->nfs_client->cl_minorversion;
43652ad5
BH		 3811 struct nfs4_server_caps_arg args = {
3812 .fhandle = fhandle,
8c61282f 3813 .bitmask = bitmask,
43652ad5 3814 };
1da177e4
LT		 3815 struct nfs4_server_caps_res res = {};
3816 struct rpc_message msg = {
3817 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 3818 .rpc_argp = &args,
1da177e4
LT		 3819 .rpc_resp = &res,
3820 };
3821 int status;
f4b23de3 3822 int i;
1da177e4 3823
8c61282f
KM		 3824 bitmask[0] = FATTR4_WORD0_SUPPORTED_ATTRS |
3825 FATTR4_WORD0_FH_EXPIRE_TYPE |
3826 FATTR4_WORD0_LINK_SUPPORT |
3827 FATTR4_WORD0_SYMLINK_SUPPORT |
3828 FATTR4_WORD0_ACLSUPPORT;
3829 if (minorversion)
3830 bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3831
7c513058 3832 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3833 if (status == 0) {
b944dba3 3834 /* Sanity check the server answers */
8c61282f 3835 switch (minorversion) {
b944dba3
TM		 3836 case 0:
3837 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
3838 res.attr_bitmask[2] = 0;
3839 break;
3840 case 1:
3841 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
3842 break;
3843 case 2:
3844 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
3845 }
1da177e4 3846 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 3847 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
3848 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
3849 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
3850 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
b944dba3
TM		 3851 NFS_CAP_CTIME|NFS_CAP_MTIME|
3852 NFS_CAP_SECURITY_LABEL);
7dd7d959
MN		 3853 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
3854 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
1da177e4
LT		 3855 server->caps |= NFS_CAP_ACLS;
3856 if (res.has_links != 0)
3857 server->caps |= NFS_CAP_HARDLINKS;
3858 if (res.has_symlinks != 0)
3859 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 3860 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
3861 server->caps |= NFS_CAP_FILEID;
3862 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
3863 server->caps |= NFS_CAP_MODE;
3864 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
3865 server->caps |= NFS_CAP_NLINK;
3866 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
3867 server->caps |= NFS_CAP_OWNER;
3868 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
3869 server->caps |= NFS_CAP_OWNER_GROUP;
3870 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
3871 server->caps |= NFS_CAP_ATIME;
3872 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
3873 server->caps |= NFS_CAP_CTIME;
3874 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
3875 server->caps |= NFS_CAP_MTIME;
aa9c2669
DQ		 3876#ifdef CONFIG_NFS_V4_SECURITY_LABEL
3877 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
3878 server->caps |= NFS_CAP_SECURITY_LABEL;
3879#endif
3880 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
3881 sizeof(server->attr_bitmask));
b944dba3 3882 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
62ab460c 3883
a65318bf
TM		 3884 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
3885 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
3886 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
b944dba3 3887 server->cache_consistency_bitmask[2] = 0;
f4b23de3
TM		 3888
3889 /* Avoid a regression due to buggy server */
3890 for (i = 0; i < ARRAY_SIZE(res.exclcreat_bitmask); i++)
3891 res.exclcreat_bitmask[i] &= res.attr_bitmask[i];
8c61282f
KM		 3892 memcpy(server->exclcreat_bitmask, res.exclcreat_bitmask,
3893 sizeof(server->exclcreat_bitmask));
f4b23de3 3894
1da177e4 3895 server->acl_bitmask = res.acl_bitmask;
264e6351 3896 server->fh_expire_type = res.fh_expire_type;
1da177e4 3897 }
cccef3b9 3898
1da177e4
LT		 3899 return status;
3900}
3901
55a97593 3902int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4 3903{
0688e64b
TM		 3904 struct nfs4_exception exception = {
3905 .interruptible = true,
3906 };
1da177e4
LT		 3907 int err;
3908 do {
3909 err = nfs4_handle_exception(server,
3910 _nfs4_server_capabilities(server, fhandle),
3911 &exception);
3912 } while (exception.retry);
3913 return err;
3914}
3915
3916static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3917 struct nfs_fsinfo *info)
3918{
aa9c2669 3919 u32 bitmask[3];
1da177e4 3920 struct nfs4_lookup_root_arg args = {
aa9c2669 3921 .bitmask = bitmask,
1da177e4
LT		 3922 };
3923 struct nfs4_lookup_res res = {
3924 .server = server,
0e574af1 3925 .fattr = info->fattr,
1da177e4
LT		 3926 .fh = fhandle,
3927 };
3928 struct rpc_message msg = {
3929 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
3930 .rpc_argp = &args,
3931 .rpc_resp = &res,
3932 };
008f55d0 3933
aa9c2669
DQ		 3934 bitmask[0] = nfs4_fattr_bitmap[0];
3935 bitmask[1] = nfs4_fattr_bitmap[1];
3936 /*
3937 * Process the label in the upcoming getfattr
3938 */
3939 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
3940
0e574af1 3941 nfs_fattr_init(info->fattr);
7c513058 3942 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3943}
3944
3945static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3946 struct nfs_fsinfo *info)
3947{
0688e64b
TM		 3948 struct nfs4_exception exception = {
3949 .interruptible = true,
3950 };
1da177e4
LT		 3951 int err;
3952 do {
fb8a5ba8 3953 err = _nfs4_lookup_root(server, fhandle, info);
b5f875a9 3954 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
fb8a5ba8
BS		 3955 switch (err) {
3956 case 0:
3957 case -NFS4ERR_WRONGSEC:
05e9cfb4 3958 goto out;
fb8a5ba8
BS		 3959 default:
3960 err = nfs4_handle_exception(server, err, &exception);
3961 }
1da177e4 3962 } while (exception.retry);
05e9cfb4 3963out:
1da177e4
LT		 3964 return err;
3965}
3966
8f70e95f
BS		 3967static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3968 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
3969{
c2190661
TM		 3970 struct rpc_auth_create_args auth_args = {
3971 .pseudoflavor = flavor,
3972 };
8f70e95f 3973 struct rpc_auth *auth;
8f70e95f 3974
c2190661 3975 auth = rpcauth_create(&auth_args, server->client);
9df1336c
AS		 3976 if (IS_ERR(auth))
3977 return -EACCES;
3978 return nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 3979}
3980
9a744ba3
CL		 3981/*
3982 * Retry pseudoroot lookup with various security flavors. We do this when:
3983 *
3984 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
3985 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
3986 *
3987 * Returns zero on success, or a negative NFS4ERR value, or a
3988 * negative errno value.
3989 */
801a16dc 3990static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 3991 struct nfs_fsinfo *info)
1da177e4 3992{
9a744ba3
CL		 3993 /* Per 3530bis 15.33.5 */
3994 static const rpc_authflavor_t flav_array[] = {
3995 RPC_AUTH_GSS_KRB5P,
3996 RPC_AUTH_GSS_KRB5I,
3997 RPC_AUTH_GSS_KRB5,
c4eafe11 3998 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 3999 RPC_AUTH_NULL,
4000 };
4001 int status = -EPERM;
4002 size_t i;
6a1a1e34 4003
4d4b69dd
WAA		 4004 if (server->auth_info.flavor_len > 0) {
4005 /* try each flavor specified by user */
4006 for (i = 0; i < server->auth_info.flavor_len; i++) {
4007 status = nfs4_lookup_root_sec(server, fhandle, info,
4008 server->auth_info.flavors[i]);
4009 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
4010 continue;
4011 break;
4012 }
4013 } else {
4014 /* no flavors specified by user, try default list */
4015 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
4016 status = nfs4_lookup_root_sec(server, fhandle, info,
4017 flav_array[i]);
4018 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
4019 continue;
4020 break;
4021 }
8f70e95f 4022 }
9a744ba3 4023
fb8a5ba8 4024 /*
d3787af2 4025 * -EACCES could mean that the user doesn't have correct permissions
fb8a5ba8
BS		 4026 * to access the mount. It could also mean that we tried to mount
4027 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
4028 * existing mount programs don't handle -EACCES very well so it should
4029 * be mapped to -EPERM instead.
4030 */
4031 if (status == -EACCES)
4032 status = -EPERM;
801a16dc
BS		 4033 return status;
4034}
4035
2ed4b95b
CL		 4036/**
4037 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
4038 * @server: initialized nfs_server handle
4039 * @fhandle: we fill in the pseudo-fs root file handle
4040 * @info: we fill in an FSINFO struct
5e6b1990 4041 * @auth_probe: probe the auth flavours
2ed4b95b
CL		 4042 *
4043 * Returns zero on success, or a negative errno.
801a16dc 4044 */
3028eb2b 4045int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
5e6b1990
TM		 4046 struct nfs_fsinfo *info,
4047 bool auth_probe)
801a16dc 4048{
c7757074 4049 int status = 0;
2ed4b95b 4050
c7757074 4051 if (!auth_probe)
5e6b1990 4052 status = nfs4_lookup_root(server, fhandle, info);
c7757074
AP		 4053
4054 if (auth_probe || status == NFS4ERR_WRONGSEC)
698c937b
TM		 4055 status = server->nfs_client->cl_mvops->find_root_sec(server,
4056 fhandle, info);
2ed4b95b 4057
1da177e4
LT		 4058 if (status == 0)
4059 status = nfs4_server_capabilities(server, fhandle);
4060 if (status == 0)
4061 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 4062
c12e87f4 4063 return nfs4_map_errors(status);
1da177e4
LT		 4064}
4065
bae36241
BS		 4066static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
4067 struct nfs_fsinfo *info)
4068{
4069 int error;
4070 struct nfs_fattr *fattr = info->fattr;
779df6a5 4071 struct nfs4_label *label = fattr->label;
bae36241
BS		 4072
4073 error = nfs4_server_capabilities(server, mntfh);
4074 if (error < 0) {
4075 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
4076 return error;
4077 }
4078
a841b54d 4079 error = nfs4_proc_getattr(server, mntfh, fattr, label, NULL);
bae36241
BS		 4080 if (error < 0) {
4081 dprintk("nfs4_get_root: getattr error = %d\n", -error);
779df6a5 4082 goto out;
bae36241
BS		 4083 }
4084
4085 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
4086 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
4087 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
4088
779df6a5 4089out:
bae36241
BS		 4090 return error;
4091}
4092
6b97fd3d
MN		 4093/*
4094 * Get locations and (maybe) other attributes of a referral.
4095 * Note that we'll actually follow the referral later when
4096 * we detect fsid mismatch in inode revalidation
4097 */
f05d147f
BS		 4098static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
4099 const struct qstr *name, struct nfs_fattr *fattr,
4100 struct nfs_fh *fhandle)
6b97fd3d
MN		 4101{
4102 int status = -ENOMEM;
4103 struct page *page = NULL;
4104 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 4105
4106 page = alloc_page(GFP_KERNEL);
4107 if (page == NULL)
4108 goto out;
4109 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
4110 if (locations == NULL)
4111 goto out;
4112
f05d147f 4113 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 4114 if (status != 0)
4115 goto out;
519ae255
CL		 4116
4117 /*
4118 * If the fsid didn't change, this is a migration event, not a
4119 * referral. Cause us to drop into the exception handler, which
4120 * will kick off migration recovery.
4121 */
6b97fd3d 4122 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 4123 dprintk("%s: server did not return a different fsid for"
4124 " a referral at %s\n", __func__, name->name);
519ae255 4125 status = -NFS4ERR_MOVED;
6b97fd3d
MN		 4126 goto out;
4127 }
533eb461
AA		 4128 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
4129 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 4130
533eb461 4131 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 4132 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 4133 memset(fhandle, 0, sizeof(struct nfs_fh));
4134out:
4135 if (page)
4136 __free_page(page);
5d7ca35a 4137 kfree(locations);
6b97fd3d
MN		 4138 return status;
4139}
4140
1775fd3e 4141static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
a841b54d
TM		 4142 struct nfs_fattr *fattr, struct nfs4_label *label,
4143 struct inode *inode)
1da177e4 4144{
771734f2 4145 __u32 bitmask[NFS4_BITMASK_SZ];
1da177e4
LT		 4146 struct nfs4_getattr_arg args = {
4147 .fh = fhandle,
771734f2 4148 .bitmask = bitmask,
1da177e4
LT		 4149 };
4150 struct nfs4_getattr_res res = {
4151 .fattr = fattr,
1775fd3e 4152 .label = label,
1da177e4
LT		 4153 .server = server,
4154 };
4155 struct rpc_message msg = {
4156 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
4157 .rpc_argp = &args,
4158 .rpc_resp = &res,
4159 };
c74dfe97
TM		 4160 unsigned short task_flags = 0;
4161
4162 /* Is this is an attribute revalidation, subject to softreval? */
4163 if (inode && (server->flags & NFS_MOUNT_SOFTREVAL))
4164 task_flags |= RPC_TASK_TIMEOUT;
aa9c2669 4165
771734f2 4166 nfs4_bitmap_copy_adjust(bitmask, nfs4_bitmask(server, label), inode);
aa9c2669 4167
0e574af1 4168 nfs_fattr_init(fattr);
c74dfe97
TM		 4169 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0);
4170 return nfs4_do_call_sync(server->client, server, &msg,
4171 &args.seq_args, &res.seq_res, task_flags);
1da177e4
LT		 4172}
4173
ec4b0925 4174int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
a841b54d
TM		 4175 struct nfs_fattr *fattr, struct nfs4_label *label,
4176 struct inode *inode)
1da177e4 4177{
0688e64b
TM		 4178 struct nfs4_exception exception = {
4179 .interruptible = true,
4180 };
1da177e4
LT		 4181 int err;
4182 do {
a841b54d 4183 err = _nfs4_proc_getattr(server, fhandle, fattr, label, inode);
b5f875a9
TM		 4184 trace_nfs4_getattr(server, fhandle, fattr, err);
4185 err = nfs4_handle_exception(server, err,
1da177e4
LT		 4186 &exception);
4187 } while (exception.retry);
4188 return err;
4189}
4190
4191/*
4192 * The file is not closed if it is opened due to the a request to change
4193 * the size of the file. The open call will not be needed once the
4194 * VFS layer lookup-intents are implemented.
4195 *
4196 * Close is called when the inode is destroyed.
4197 * If we haven't opened the file for O_WRONLY, we
4198 * need to in the size_change case to obtain a stateid.
4199 *
4200 * Got race?
4201 * Because OPEN is always done by name in nfsv4, it is
4202 * possible that we opened a different file by the same
4203 * name. We can recognize this race condition, but we
4204 * can't do anything about it besides returning an error.
4205 *
4206 * This will be fixed with VFS changes (lookup-intent).
4207 */
4208static int
4209nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
4210 struct iattr *sattr)
4211{
2b0143b5 4212 struct inode *inode = d_inode(dentry);
a52458b4 4213 const struct cred *cred = NULL;
29b59f94 4214 struct nfs_open_context *ctx = NULL;
14c43f76 4215 struct nfs4_label *label = NULL;
1da177e4
LT		 4216 int status;
4217
88ac815c
PT		 4218 if (pnfs_ld_layoutret_on_setattr(inode) &&
4219 sattr->ia_valid & ATTR_SIZE &&
4220 sattr->ia_size < i_size_read(inode))
24028672 4221 pnfs_commit_and_return_layout(inode);
8a1636c4 4222
0e574af1 4223 nfs_fattr_init(fattr);
1da177e4 4224
2669940d
AA		 4225 /* Deal with open(O_TRUNC) */
4226 if (sattr->ia_valid & ATTR_OPEN)
cc7936f9 4227 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2669940d
AA		 4228
4229 /* Optimization: if the end result is no change, don't RPC */
cc7936f9 4230 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2669940d
AA		 4231 return 0;
4232
d530838b 4233 /* Search for an existing open(O_WRITE) file */
659bfcd6 4234 if (sattr->ia_valid & ATTR_FILE) {
659bfcd6
TM		 4235
4236 ctx = nfs_file_open_context(sattr->ia_file);
29b59f94 4237 if (ctx)
504e5189 4238 cred = ctx->cred;
659bfcd6 4239 }
08e9eac4 4240
14c43f76
DQ		 4241 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
4242 if (IS_ERR(label))
4243 return PTR_ERR(label);
4244
199366f0
TM		 4245 /* Return any delegations if we're going to change ACLs */
4246 if ((sattr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0)
c01d3645 4247 nfs4_inode_make_writeable(inode);
199366f0 4248
29b59f94 4249 status = nfs4_do_setattr(inode, cred, fattr, sattr, ctx, NULL, label);
aa9c2669 4250 if (status == 0) {
f044636d 4251 nfs_setattr_update_inode(inode, sattr, fattr);
aa9c2669
DQ		 4252 nfs_setsecurity(inode, fattr, label);
4253 }
14c43f76 4254 nfs4_label_free(label);
1da177e4
LT		 4255 return status;
4256}
4257
0c2e53f1 4258static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
f7b37b8b 4259 struct dentry *dentry, struct nfs_fh *fhandle,
1775fd3e 4260 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 4261{
0c2e53f1 4262 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 4263 int status;
4264 struct nfs4_lookup_arg args = {
4265 .bitmask = server->attr_bitmask,
0c2e53f1 4266 .dir_fh = NFS_FH(dir),
f7b37b8b 4267 .name = &dentry->d_name,
2b3de441
DH		 4268 };
4269 struct nfs4_lookup_res res = {
4270 .server = server,
4271 .fattr = fattr,
aa9c2669 4272 .label = label,
2b3de441
DH		 4273 .fh = fhandle,
4274 };
4275 struct rpc_message msg = {
4276 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
4277 .rpc_argp = &args,
4278 .rpc_resp = &res,
4279 };
f7b37b8b
TM		 4280 unsigned short task_flags = 0;
4281
4282 /* Is this is an attribute revalidation, subject to softreval? */
4283 if (nfs_lookup_is_soft_revalidate(dentry))
4284 task_flags |= RPC_TASK_TIMEOUT;
2b3de441 4285
aa9c2669
DQ		 4286 args.bitmask = nfs4_bitmask(server, label);
4287
2b3de441
DH		 4288 nfs_fattr_init(fattr);
4289
f7b37b8b
TM		 4290 dprintk("NFS call lookup %pd2\n", dentry);
4291 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0);
4292 status = nfs4_do_call_sync(clnt, server, &msg,
4293 &args.seq_args, &res.seq_res, task_flags);
1da177e4
LT		 4294 dprintk("NFS reply lookup: %d\n", status);
4295 return status;
4296}
4297
72de53ec 4298static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 4299{
7ebb9315 4300 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 4301 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 4302 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4303 fattr->nlink = 2;
4304}
4305
72de53ec 4306static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
f7b37b8b 4307 struct dentry *dentry, struct nfs_fh *fhandle,
1775fd3e 4308 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4 4309{
0688e64b
TM		 4310 struct nfs4_exception exception = {
4311 .interruptible = true,
4312 };
72de53ec 4313 struct rpc_clnt *client = *clnt;
f7b37b8b 4314 const struct qstr *name = &dentry->d_name;
1da177e4
LT		 4315 int err;
4316 do {
f7b37b8b 4317 err = _nfs4_proc_lookup(client, dir, dentry, fhandle, fattr, label);
078ea3df 4318 trace_nfs4_lookup(dir, name, err);
72de53ec 4319 switch (err) {
08ef7bd3 4320 case -NFS4ERR_BADNAME:
72de53ec
BS		 4321 err = -ENOENT;
4322 goto out;
0c2e53f1 4323 case -NFS4ERR_MOVED:
f05d147f 4324 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
c86c90c6
DM		 4325 if (err == -NFS4ERR_MOVED)
4326 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
72de53ec 4327 goto out;
0c2e53f1 4328 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 4329 err = -EPERM;
4330 if (client != *clnt)
4331 goto out;
66b06860 4332 client = nfs4_negotiate_security(client, dir, name);
72de53ec
BS		 4333 if (IS_ERR(client))
4334 return PTR_ERR(client);
4335
4336 exception.retry = 1;
4337 break;
4338 default:
4339 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 4340 }
1da177e4 4341 } while (exception.retry);
72de53ec
BS		 4342
4343out:
4344 if (err == 0)
4345 *clnt = client;
4346 else if (client != *clnt)
4347 rpc_shutdown_client(client);
4348
1da177e4
LT		 4349 return err;
4350}
4351
f7b37b8b 4352static int nfs4_proc_lookup(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 4353 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
4354 struct nfs4_label *label)
72de53ec
BS		 4355{
4356 int status;
4357 struct rpc_clnt *client = NFS_CLIENT(dir);
4358
f7b37b8b 4359 status = nfs4_proc_lookup_common(&client, dir, dentry, fhandle, fattr, label);
72de53ec
BS		 4360 if (client != NFS_CLIENT(dir)) {
4361 rpc_shutdown_client(client);
4362 nfs_fixup_secinfo_attributes(fattr);
4363 }
4364 return status;
4365}
4366
f05d147f 4367struct rpc_clnt *
f7b37b8b 4368nfs4_proc_lookup_mountpoint(struct inode *dir, struct dentry *dentry,
f05d147f
BS		 4369 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
4370{
b72888cb 4371 struct rpc_clnt *client = NFS_CLIENT(dir);
f05d147f 4372 int status;
f05d147f 4373
f7b37b8b 4374 status = nfs4_proc_lookup_common(&client, dir, dentry, fhandle, fattr, NULL);
b72888cb 4375 if (status < 0)
f05d147f 4376 return ERR_PTR(status);
b72888cb 4377 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
f05d147f
BS		 4378}
4379
5b5faaf6
JL		 4380static int _nfs4_proc_lookupp(struct inode *inode,
4381 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
4382 struct nfs4_label *label)
4383{
4384 struct rpc_clnt *clnt = NFS_CLIENT(inode);
4385 struct nfs_server *server = NFS_SERVER(inode);
4386 int status;
4387 struct nfs4_lookupp_arg args = {
4388 .bitmask = server->attr_bitmask,
4389 .fh = NFS_FH(inode),
4390 };
4391 struct nfs4_lookupp_res res = {
4392 .server = server,
4393 .fattr = fattr,
4394 .label = label,
4395 .fh = fhandle,
4396 };
4397 struct rpc_message msg = {
4398 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUPP],
4399 .rpc_argp = &args,
4400 .rpc_resp = &res,
4401 };
76998ebb
TM		 4402 unsigned short task_flags = 0;
4403
4404 if (NFS_SERVER(inode)->flags & NFS_MOUNT_SOFTREVAL)
4405 task_flags |= RPC_TASK_TIMEOUT;
5b5faaf6
JL		 4406
4407 args.bitmask = nfs4_bitmask(server, label);
4408
4409 nfs_fattr_init(fattr);
4410
4411 dprintk("NFS call lookupp ino=0x%lx\n", inode->i_ino);
4412 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
76998ebb 4413 &res.seq_res, task_flags);
5b5faaf6
JL		 4414 dprintk("NFS reply lookupp: %d\n", status);
4415 return status;
4416}
4417
4418static int nfs4_proc_lookupp(struct inode *inode, struct nfs_fh *fhandle,
4419 struct nfs_fattr *fattr, struct nfs4_label *label)
4420{
0688e64b
TM		 4421 struct nfs4_exception exception = {
4422 .interruptible = true,
4423 };
5b5faaf6
JL		 4424 int err;
4425 do {
4426 err = _nfs4_proc_lookupp(inode, fhandle, fattr, label);
4427 trace_nfs4_lookupp(inode, err);
4428 err = nfs4_handle_exception(NFS_SERVER(inode), err,
4429 &exception);
4430 } while (exception.retry);
4431 return err;
4432}
4433
1da177e4
LT		 4434static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
4435{
76b32999 4436 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 4437 struct nfs4_accessargs args = {
4438 .fh = NFS_FH(inode),
1750d929 4439 .access = entry->mask,
76b32999
TM		 4440 };
4441 struct nfs4_accessres res = {
4442 .server = server,
1da177e4 4443 };
1da177e4
LT		 4444 struct rpc_message msg = {
4445 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
4446 .rpc_argp = &args,
4447 .rpc_resp = &res,
4448 .rpc_cred = entry->cred,
4449 };
aa9c2669 4450 int status = 0;
1da177e4 4451
7c672654 4452 if (!nfs4_have_delegation(inode, FMODE_READ)) {
8bcbe7d9
TM		 4453 res.fattr = nfs_alloc_fattr();
4454 if (res.fattr == NULL)
4455 return -ENOMEM;
4456 args.bitmask = server->cache_consistency_bitmask;
4457 }
7c513058 4458 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 4459 if (!status) {
6168f62c 4460 nfs_access_set_mask(entry, res.access);
8bcbe7d9
TM		 4461 if (res.fattr)
4462 nfs_refresh_inode(inode, res.fattr);
1da177e4 4463 }
c407d41a 4464 nfs_free_fattr(res.fattr);
1da177e4
LT		 4465 return status;
4466}
4467
4468static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
4469{
0688e64b
TM		 4470 struct nfs4_exception exception = {
4471 .interruptible = true,
4472 };
1da177e4
LT		 4473 int err;
4474 do {
c1578b76
TM		 4475 err = _nfs4_proc_access(inode, entry);
4476 trace_nfs4_access(inode, err);
4477 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 4478 &exception);
4479 } while (exception.retry);
4480 return err;
4481}
4482
4483/*
4484 * TODO: For the time being, we don't try to get any attributes
4485 * along with any of the zero-copy operations READ, READDIR,
4486 * READLINK, WRITE.
4487 *
4488 * In the case of the first three, we want to put the GETATTR
4489 * after the read-type operation -- this is because it is hard
4490 * to predict the length of a GETATTR response in v4, and thus
4491 * align the READ data correctly. This means that the GETATTR
4492 * may end up partially falling into the page cache, and we should
4493 * shift it into the 'tail' of the xdr_buf before processing.
4494 * To do this efficiently, we need to know the total length
4495 * of data received, which doesn't seem to be available outside
4496 * of the RPC layer.
4497 *
4498 * In the case of WRITE, we also want to put the GETATTR after
4499 * the operation -- in this case because we want to make sure
140150db 4500 * we get the post-operation mtime and size.
1da177e4
LT		 4501 *
4502 * Both of these changes to the XDR layer would in fact be quite
4503 * minor, but I decided to leave them for a subsequent patch.
4504 */
4505static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
4506 unsigned int pgbase, unsigned int pglen)
4507{
4508 struct nfs4_readlink args = {
4509 .fh = NFS_FH(inode),
4510 .pgbase = pgbase,
4511 .pglen = pglen,
4512 .pages = &page,
4513 };
f50c7000 4514 struct nfs4_readlink_res res;
1da177e4
LT		 4515 struct rpc_message msg = {
4516 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
4517 .rpc_argp = &args,
f50c7000 4518 .rpc_resp = &res,
1da177e4
LT		 4519 };
4520
7c513058 4521 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4522}
4523
4524static int nfs4_proc_readlink(struct inode *inode, struct page *page,
4525 unsigned int pgbase, unsigned int pglen)
4526{
0688e64b
TM		 4527 struct nfs4_exception exception = {
4528 .interruptible = true,
4529 };
1da177e4
LT		 4530 int err;
4531 do {
c1578b76
TM		 4532 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
4533 trace_nfs4_readlink(inode, err);
4534 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 4535 &exception);
4536 } while (exception.retry);
4537 return err;
4538}
4539
1da177e4 4540/*
8867fe58 4541 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 4542 */
1da177e4
LT		 4543static int
4544nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 4545 int flags)
1da177e4 4546{
dff25ddb 4547 struct nfs_server *server = NFS_SERVER(dir);
aa9c2669 4548 struct nfs4_label l, *ilabel = NULL;
8867fe58 4549 struct nfs_open_context *ctx;
1da177e4 4550 struct nfs4_state *state;
1da177e4
LT		 4551 int status = 0;
4552
532d4def 4553 ctx = alloc_nfs_open_context(dentry, FMODE_READ, NULL);
8867fe58
MS		 4554 if (IS_ERR(ctx))
4555 return PTR_ERR(ctx);
4556
aa9c2669
DQ		 4557 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
4558
dff25ddb
AG		 4559 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
4560 sattr->ia_mode &= ~current_umask();
c5c3fb5f 4561 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, NULL);
1da177e4
LT		 4562 if (IS_ERR(state)) {
4563 status = PTR_ERR(state);
c0204fd2 4564 goto out;
1da177e4 4565 }
1da177e4 4566out:
aa9c2669 4567 nfs4_label_release_security(ilabel);
8867fe58 4568 put_nfs_open_context(ctx);
1da177e4
LT		 4569 return status;
4570}
4571
3c591175
TM		 4572static int
4573_nfs4_proc_remove(struct inode *dir, const struct qstr *name, u32 ftype)
1da177e4 4574{
16e42959 4575 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 4576 struct nfs_removeargs args = {
1da177e4 4577 .fh = NFS_FH(dir),
26fe5750 4578 .name = *name,
16e42959 4579 };
4fdc17b2 4580 struct nfs_removeres res = {
16e42959 4581 .server = server,
1da177e4 4582 };
1da177e4 4583 struct rpc_message msg = {
4fdc17b2
TM		 4584 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
4585 .rpc_argp = &args,
4586 .rpc_resp = &res,
1da177e4 4587 };
d3129ef6 4588 unsigned long timestamp = jiffies;
778d2817 4589 int status;
1da177e4 4590
7c513058 4591 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
3c591175
TM		 4592 if (status == 0) {
4593 spin_lock(&dir->i_lock);
1b523ca9
FL		 4594 nfs4_update_changeattr_locked(dir, &res.cinfo, timestamp,
4595 NFS_INO_INVALID_DATA);
3c591175
TM		 4596 /* Removing a directory decrements nlink in the parent */
4597 if (ftype == NF4DIR && dir->i_nlink > 2)
4598 nfs4_dec_nlink_locked(dir);
4599 spin_unlock(&dir->i_lock);
4600 }
1da177e4
LT		 4601 return status;
4602}
4603
912678db 4604static int nfs4_proc_remove(struct inode *dir, struct dentry *dentry)
1da177e4 4605{
0688e64b
TM		 4606 struct nfs4_exception exception = {
4607 .interruptible = true,
4608 };
912678db 4609 struct inode *inode = d_inode(dentry);
1da177e4 4610 int err;
912678db 4611
c01d3645
TM		 4612 if (inode) {
4613 if (inode->i_nlink == 1)
4614 nfs4_inode_return_delegation(inode);
4615 else
4616 nfs4_inode_make_writeable(inode);
4617 }
912678db 4618 do {
3c591175 4619 err = _nfs4_proc_remove(dir, &dentry->d_name, NF4REG);
912678db
TM		 4620 trace_nfs4_remove(dir, &dentry->d_name, err);
4621 err = nfs4_handle_exception(NFS_SERVER(dir), err,
4622 &exception);
4623 } while (exception.retry);
4624 return err;
4625}
4626
4627static int nfs4_proc_rmdir(struct inode *dir, const struct qstr *name)
4628{
0688e64b
TM		 4629 struct nfs4_exception exception = {
4630 .interruptible = true,
4631 };
912678db
TM		 4632 int err;
4633
1da177e4 4634 do {
3c591175 4635 err = _nfs4_proc_remove(dir, name, NF4DIR);
078ea3df
TM		 4636 trace_nfs4_remove(dir, name, err);
4637 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4638 &exception);
4639 } while (exception.retry);
4640 return err;
4641}
4642
ed7e9ad0
TM		 4643static void nfs4_proc_unlink_setup(struct rpc_message *msg,
4644 struct dentry *dentry,
4645 struct inode *inode)
1da177e4 4646{
e4eff1a6
TM		 4647 struct nfs_removeargs *args = msg->rpc_argp;
4648 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 4649
977fcc2b 4650 res->server = NFS_SB(dentry->d_sb);
1da177e4 4651 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
fba83f34 4652 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1, 0);
aa9c2669
DQ		 4653
4654 nfs_fattr_init(res->dir_attr);
977fcc2b
TM		 4655
4656 if (inode)
4657 nfs4_inode_return_delegation(inode);
1da177e4
LT		 4658}
4659
34e137cc
BS		 4660static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
4661{
42e1cca7 4662 nfs4_setup_sequence(NFS_SB(data->dentry->d_sb)->nfs_client,
d9afbd1b
TM		 4663 &data->args.seq_args,
4664 &data->res.seq_res,
4665 task);
1da177e4
LT		 4666}
4667
e4eff1a6 4668static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 4669{
078ea3df
TM		 4670 struct nfs_unlinkdata *data = task->tk_calldata;
4671 struct nfs_removeres *res = &data->res;
e4eff1a6 4672
14516c3a
TM		 4673 if (!nfs4_sequence_done(task, &res->seq_res))
4674 return 0;
8478eaa1
N		 4675 if (nfs4_async_handle_error(task, res->server, NULL,
4676 &data->timeout) == -EAGAIN)
e4eff1a6 4677 return 0;
c40d52fe 4678 if (task->tk_status == 0)
1b523ca9
FL		 4679 nfs4_update_changeattr(dir, &res->cinfo,
4680 res->dir_attr->time_start,
4681 NFS_INO_INVALID_DATA);
e4eff1a6 4682 return 1;
1da177e4
LT		 4683}
4684
f2c2c552
TM		 4685static void nfs4_proc_rename_setup(struct rpc_message *msg,
4686 struct dentry *old_dentry,
4687 struct dentry *new_dentry)
d3d4152a 4688{
d3d4152a
JL		 4689 struct nfs_renameargs *arg = msg->rpc_argp;
4690 struct nfs_renameres *res = msg->rpc_resp;
f2c2c552
TM		 4691 struct inode *old_inode = d_inode(old_dentry);
4692 struct inode *new_inode = d_inode(new_dentry);
d3d4152a 4693
f2c2c552 4694 if (old_inode)
c01d3645 4695 nfs4_inode_make_writeable(old_inode);
f2c2c552
TM		 4696 if (new_inode)
4697 nfs4_inode_return_delegation(new_inode);
d3d4152a 4698 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
f2c2c552 4699 res->server = NFS_SB(old_dentry->d_sb);
fba83f34 4700 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1, 0);
d3d4152a
JL		 4701}
4702
c6bfa1a1
BS		 4703static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
4704{
42e1cca7 4705 nfs4_setup_sequence(NFS_SERVER(data->old_dir)->nfs_client,
d9afbd1b
TM		 4706 &data->args.seq_args,
4707 &data->res.seq_res,
4708 task);
d3d4152a
JL		 4709}
4710
4711static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
4712 struct inode *new_dir)
4713{
fbc6f7c2
TM		 4714 struct nfs_renamedata *data = task->tk_calldata;
4715 struct nfs_renameres *res = &data->res;
d3d4152a
JL		 4716
4717 if (!nfs4_sequence_done(task, &res->seq_res))
4718 return 0;
8478eaa1 4719 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
d3d4152a
JL		 4720 return 0;
4721
c733c49c 4722 if (task->tk_status == 0) {
5636ec4e
TM		 4723 if (new_dir != old_dir) {
4724 /* Note: If we moved a directory, nlink will change */
1b523ca9 4725 nfs4_update_changeattr(old_dir, &res->old_cinfo,
5636ec4e 4726 res->old_fattr->time_start,
1b523ca9
FL		 4727 NFS_INO_INVALID_OTHER |
4728 NFS_INO_INVALID_DATA);
4729 nfs4_update_changeattr(new_dir, &res->new_cinfo,
5636ec4e 4730 res->new_fattr->time_start,
1b523ca9
FL		 4731 NFS_INO_INVALID_OTHER |
4732 NFS_INO_INVALID_DATA);
5636ec4e 4733 } else
1b523ca9 4734 nfs4_update_changeattr(old_dir, &res->old_cinfo,
5636ec4e 4735 res->old_fattr->time_start,
1b523ca9 4736 NFS_INO_INVALID_DATA);
c733c49c 4737 }
d3d4152a
JL		 4738 return 1;
4739}
4740
beffb8fe 4741static int _nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name)
1da177e4 4742{
91ba2eee 4743 struct nfs_server *server = NFS_SERVER(inode);
2f28dc38 4744 __u32 bitmask[NFS4_BITMASK_SZ];
1da177e4
LT		 4745 struct nfs4_link_arg arg = {
4746 .fh = NFS_FH(inode),
4747 .dir_fh = NFS_FH(dir),
4748 .name = name,
2f28dc38 4749 .bitmask = bitmask,
91ba2eee 4750 };
91ba2eee
TM		 4751 struct nfs4_link_res res = {
4752 .server = server,
1775fd3e 4753 .label = NULL,
1da177e4 4754 };
1da177e4
LT		 4755 struct rpc_message msg = {
4756 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
4757 .rpc_argp = &arg,
91ba2eee 4758 .rpc_resp = &res,
1da177e4 4759 };
136f2627
TM		 4760 int status = -ENOMEM;
4761
4762 res.fattr = nfs_alloc_fattr();
778d2817 4763 if (res.fattr == NULL)
136f2627 4764 goto out;
1da177e4 4765
14c43f76
DQ		 4766 res.label = nfs4_label_alloc(server, GFP_KERNEL);
4767 if (IS_ERR(res.label)) {
4768 status = PTR_ERR(res.label);
4769 goto out;
4770 }
4771
c01d3645 4772 nfs4_inode_make_writeable(inode);
2f28dc38 4773 nfs4_bitmap_copy_adjust_setattr(bitmask, nfs4_bitmask(server, res.label), inode);
9f768272 4774
7c513058 4775 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee 4776 if (!status) {
1b523ca9
FL		 4777 nfs4_update_changeattr(dir, &res.cinfo, res.fattr->time_start,
4778 NFS_INO_INVALID_DATA);
aa9c2669
DQ		 4779 status = nfs_post_op_update_inode(inode, res.fattr);
4780 if (!status)
4781 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 4782 }
14c43f76
DQ		 4783
4784
4785 nfs4_label_free(res.label);
4786
136f2627 4787out:
136f2627 4788 nfs_free_fattr(res.fattr);
1da177e4
LT		 4789 return status;
4790}
4791
beffb8fe 4792static int nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name)
1da177e4 4793{
0688e64b
TM		 4794 struct nfs4_exception exception = {
4795 .interruptible = true,
4796 };
1da177e4
LT		 4797 int err;
4798 do {
4799 err = nfs4_handle_exception(NFS_SERVER(inode),
4800 _nfs4_proc_link(inode, dir, name),
4801 &exception);
4802 } while (exception.retry);
4803 return err;
4804}
4805
57dc9a57
TM		 4806struct nfs4_createdata {
4807 struct rpc_message msg;
4808 struct nfs4_create_arg arg;
4809 struct nfs4_create_res res;
4810 struct nfs_fh fh;
4811 struct nfs_fattr fattr;
1775fd3e 4812 struct nfs4_label *label;
57dc9a57
TM		 4813};
4814
4815static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
beffb8fe 4816 const struct qstr *name, struct iattr *sattr, u32 ftype)
57dc9a57
TM		 4817{
4818 struct nfs4_createdata *data;
4819
4820 data = kzalloc(sizeof(*data), GFP_KERNEL);
4821 if (data != NULL) {
4822 struct nfs_server *server = NFS_SERVER(dir);
4823
14c43f76
DQ		 4824 data->label = nfs4_label_alloc(server, GFP_KERNEL);
4825 if (IS_ERR(data->label))
4826 goto out_free;
4827
57dc9a57
TM		 4828 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
4829 data->msg.rpc_argp = &data->arg;
4830 data->msg.rpc_resp = &data->res;
4831 data->arg.dir_fh = NFS_FH(dir);
4832 data->arg.server = server;
4833 data->arg.name = name;
4834 data->arg.attrs = sattr;
4835 data->arg.ftype = ftype;
aa9c2669 4836 data->arg.bitmask = nfs4_bitmask(server, data->label);
dff25ddb 4837 data->arg.umask = current_umask();
57dc9a57
TM		 4838 data->res.server = server;
4839 data->res.fh = &data->fh;
4840 data->res.fattr = &data->fattr;
1775fd3e 4841 data->res.label = data->label;
57dc9a57 4842 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 4843 }
4844 return data;
14c43f76
DQ		 4845out_free:
4846 kfree(data);
4847 return NULL;
57dc9a57
TM		 4848}
4849
4850static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
4851{
7c513058 4852 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 4853 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57 4854 if (status == 0) {
3c591175 4855 spin_lock(&dir->i_lock);
1b523ca9
FL		 4856 nfs4_update_changeattr_locked(dir, &data->res.dir_cinfo,
4857 data->res.fattr->time_start,
4858 NFS_INO_INVALID_DATA);
3c591175
TM		 4859 /* Creating a directory bumps nlink in the parent */
4860 if (data->arg.ftype == NF4DIR)
4861 nfs4_inc_nlink_locked(dir);
4862 spin_unlock(&dir->i_lock);
1775fd3e 4863 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 4864 }
4865 return status;
4866}
4867
4868static void nfs4_free_createdata(struct nfs4_createdata *data)
4869{
14c43f76 4870 nfs4_label_free(data->label);
57dc9a57
TM		 4871 kfree(data);
4872}
4873
4f390c15 4874static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 4875 struct page *page, unsigned int len, struct iattr *sattr,
4876 struct nfs4_label *label)
1da177e4 4877{
57dc9a57
TM		 4878 struct nfs4_createdata *data;
4879 int status = -ENAMETOOLONG;
1da177e4 4880
94a6d753 4881 if (len > NFS4_MAXPATHLEN)
57dc9a57 4882 goto out;
4f390c15 4883
57dc9a57
TM		 4884 status = -ENOMEM;
4885 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
4886 if (data == NULL)
4887 goto out;
4888
4889 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
4890 data->arg.u.symlink.pages = &page;
4891 data->arg.u.symlink.len = len;
1775fd3e 4892 data->arg.label = label;
1da177e4 4893
57dc9a57
TM		 4894 status = nfs4_do_create(dir, dentry, data);
4895
4896 nfs4_free_createdata(data);
4897out:
1da177e4
LT		 4898 return status;
4899}
4900
4f390c15 4901static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 4902 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 4903{
0688e64b
TM		 4904 struct nfs4_exception exception = {
4905 .interruptible = true,
4906 };
aa9c2669 4907 struct nfs4_label l, *label = NULL;
1da177e4 4908 int err;
aa9c2669
DQ		 4909
4910 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4911
1da177e4 4912 do {
078ea3df
TM		 4913 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
4914 trace_nfs4_symlink(dir, &dentry->d_name, err);
4915 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4916 &exception);
4917 } while (exception.retry);
aa9c2669
DQ		 4918
4919 nfs4_label_release_security(label);
1da177e4
LT		 4920 return err;
4921}
4922
4923static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 4924 struct iattr *sattr, struct nfs4_label *label)
1da177e4 4925{
57dc9a57
TM		 4926 struct nfs4_createdata *data;
4927 int status = -ENOMEM;
1da177e4 4928
57dc9a57
TM		 4929 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
4930 if (data == NULL)
4931 goto out;
4932
1775fd3e 4933 data->arg.label = label;
57dc9a57
TM		 4934 status = nfs4_do_create(dir, dentry, data);
4935
4936 nfs4_free_createdata(data);
4937out:
1da177e4
LT		 4938 return status;
4939}
4940
4941static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
4942 struct iattr *sattr)
4943{
dff25ddb 4944 struct nfs_server *server = NFS_SERVER(dir);
0688e64b
TM		 4945 struct nfs4_exception exception = {
4946 .interruptible = true,
4947 };
aa9c2669 4948 struct nfs4_label l, *label = NULL;
1da177e4 4949 int err;
a8a5da99 4950
aa9c2669
DQ		 4951 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4952
dff25ddb
AG		 4953 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
4954 sattr->ia_mode &= ~current_umask();
1da177e4 4955 do {
078ea3df
TM		 4956 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
4957 trace_nfs4_mkdir(dir, &dentry->d_name, err);
4958 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4959 &exception);
4960 } while (exception.retry);
aa9c2669
DQ		 4961 nfs4_label_release_security(label);
4962
1da177e4
LT		 4963 return err;
4964}
4965
82e22a5e
TM		 4966static int _nfs4_proc_readdir(struct nfs_readdir_arg *nr_arg,
4967 struct nfs_readdir_res *nr_res)
1da177e4 4968{
82e22a5e 4969 struct inode *dir = d_inode(nr_arg->dentry);
05ad9175 4970 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 4971 struct nfs4_readdir_arg args = {
4972 .fh = NFS_FH(dir),
82e22a5e 4973 .pages = nr_arg->pages,
1da177e4 4974 .pgbase = 0,
82e22a5e
TM		 4975 .count = nr_arg->page_len,
4976 .plus = nr_arg->plus,
1da177e4
LT		 4977 };
4978 struct nfs4_readdir_res res;
4979 struct rpc_message msg = {
4980 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
4981 .rpc_argp = &args,
4982 .rpc_resp = &res,
82e22a5e 4983 .rpc_cred = nr_arg->cred,
1da177e4
LT		 4984 };
4985 int status;
4986
82e22a5e
TM		 4987 dprintk("%s: dentry = %pd2, cookie = %llu\n", __func__,
4988 nr_arg->dentry, (unsigned long long)nr_arg->cookie);
05ad9175
OK		 4989 if (!(server->caps & NFS_CAP_SECURITY_LABEL))
4990 args.bitmask = server->attr_bitmask_nl;
4991 else
4992 args.bitmask = server->attr_bitmask;
4993
82e22a5e 4994 nfs4_setup_readdir(nr_arg->cookie, nr_arg->verf, nr_arg->dentry, &args);
1da177e4 4995 res.pgbase = args.pgbase;
05ad9175
OK		 4996 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
4997 &res.seq_res, 0);
ac396128 4998 if (status >= 0) {
82e22a5e 4999 memcpy(nr_res->verf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 5000 status += args.pgbase;
5001 }
c4812998
TM		 5002
5003 nfs_invalidate_atime(dir);
5004
3110ff80 5005 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 5006 return status;
5007}
5008
82e22a5e
TM		 5009static int nfs4_proc_readdir(struct nfs_readdir_arg *arg,
5010 struct nfs_readdir_res *res)
1da177e4 5011{
0688e64b
TM		 5012 struct nfs4_exception exception = {
5013 .interruptible = true,
5014 };
1da177e4
LT		 5015 int err;
5016 do {
82e22a5e
TM		 5017 err = _nfs4_proc_readdir(arg, res);
5018 trace_nfs4_readdir(d_inode(arg->dentry), err);
5019 err = nfs4_handle_exception(NFS_SERVER(d_inode(arg->dentry)),
5020 err, &exception);
1da177e4
LT		 5021 } while (exception.retry);
5022 return err;
5023}
5024
5025static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 5026 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 5027{
57dc9a57
TM		 5028 struct nfs4_createdata *data;
5029 int mode = sattr->ia_mode;
5030 int status = -ENOMEM;
1da177e4 5031
57dc9a57
TM		 5032 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
5033 if (data == NULL)
5034 goto out;
5035
1da177e4 5036 if (S_ISFIFO(mode))
57dc9a57 5037 data->arg.ftype = NF4FIFO;
1da177e4 5038 else if (S_ISBLK(mode)) {
57dc9a57
TM		 5039 data->arg.ftype = NF4BLK;
5040 data->arg.u.device.specdata1 = MAJOR(rdev);
5041 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 5042 }
5043 else if (S_ISCHR(mode)) {
57dc9a57
TM		 5044 data->arg.ftype = NF4CHR;
5045 data->arg.u.device.specdata1 = MAJOR(rdev);
5046 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 5047 } else if (!S_ISSOCK(mode)) {
5048 status = -EINVAL;
5049 goto out_free;
1da177e4 5050 }
1775fd3e 5051
aa9c2669 5052 data->arg.label = label;
57dc9a57 5053 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 5054out_free:
57dc9a57
TM		 5055 nfs4_free_createdata(data);
5056out:
1da177e4
LT		 5057 return status;
5058}
5059
5060static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
5061 struct iattr *sattr, dev_t rdev)
5062{
dff25ddb 5063 struct nfs_server *server = NFS_SERVER(dir);
0688e64b
TM		 5064 struct nfs4_exception exception = {
5065 .interruptible = true,
5066 };
aa9c2669 5067 struct nfs4_label l, *label = NULL;
1da177e4 5068 int err;
a8a5da99 5069
aa9c2669
DQ		 5070 label = nfs4_label_init_security(dir, dentry, sattr, &l);
5071
dff25ddb
AG		 5072 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
5073 sattr->ia_mode &= ~current_umask();
1da177e4 5074 do {
078ea3df
TM		 5075 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
5076 trace_nfs4_mknod(dir, &dentry->d_name, err);
5077 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 5078 &exception);
5079 } while (exception.retry);
aa9c2669
DQ		 5080
5081 nfs4_label_release_security(label);
5082
1da177e4
LT		 5083 return err;
5084}
5085
5086static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
5087 struct nfs_fsstat *fsstat)
5088{
5089 struct nfs4_statfs_arg args = {
5090 .fh = fhandle,
5091 .bitmask = server->attr_bitmask,
5092 };
24ad148a
BH		 5093 struct nfs4_statfs_res res = {
5094 .fsstat = fsstat,
5095 };
1da177e4
LT		 5096 struct rpc_message msg = {
5097 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
5098 .rpc_argp = &args,
24ad148a 5099 .rpc_resp = &res,
1da177e4
LT		 5100 };
5101
0e574af1 5102 nfs_fattr_init(fsstat->fattr);
7c513058 5103 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 5104}
5105
5106static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
5107{
0688e64b
TM		 5108 struct nfs4_exception exception = {
5109 .interruptible = true,
5110 };
1da177e4
LT		 5111 int err;
5112 do {
5113 err = nfs4_handle_exception(server,
5114 _nfs4_proc_statfs(server, fhandle, fsstat),
5115 &exception);
5116 } while (exception.retry);
5117 return err;
5118}
5119
5120static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
5121 struct nfs_fsinfo *fsinfo)
5122{
5123 struct nfs4_fsinfo_arg args = {
5124 .fh = fhandle,
5125 .bitmask = server->attr_bitmask,
5126 };
3dda5e43
BH		 5127 struct nfs4_fsinfo_res res = {
5128 .fsinfo = fsinfo,
5129 };
1da177e4
LT		 5130 struct rpc_message msg = {
5131 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
5132 .rpc_argp = &args,
3dda5e43 5133 .rpc_resp = &res,
1da177e4
LT		 5134 };
5135
7c513058 5136 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 5137}
5138
5139static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
5140{
0688e64b
TM		 5141 struct nfs4_exception exception = {
5142 .interruptible = true,
5143 };
1da177e4
LT		 5144 int err;
5145
5146 do {
83ca7f5a 5147 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
b5f875a9 5148 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
83ca7f5a 5149 if (err == 0) {
7dc2993a 5150 nfs4_set_lease_period(server->nfs_client, fsinfo->lease_time * HZ);
83ca7f5a
CL		 5151 break;
5152 }
5153 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 5154 } while (exception.retry);
5155 return err;
5156}
5157
5158static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
5159{
e38eb650
BS		 5160 int error;
5161
0e574af1 5162 nfs_fattr_init(fsinfo->fattr);
e38eb650 5163 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 5164 if (error == 0) {
5165 /* block layout checks this! */
5166 server->pnfs_blksize = fsinfo->blksize;
ca440c38 5167 set_pnfs_layoutdriver(server, fhandle, fsinfo);
dc182549 5168 }
e38eb650
BS		 5169
5170 return error;
1da177e4
LT		 5171}
5172
5173static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
5174 struct nfs_pathconf *pathconf)
5175{
5176 struct nfs4_pathconf_arg args = {
5177 .fh = fhandle,
5178 .bitmask = server->attr_bitmask,
5179 };
d45b2989
BH		 5180 struct nfs4_pathconf_res res = {
5181 .pathconf = pathconf,
5182 };
1da177e4
LT		 5183 struct rpc_message msg = {
5184 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
5185 .rpc_argp = &args,
d45b2989 5186 .rpc_resp = &res,
1da177e4
LT		 5187 };
5188
5189 /* None of the pathconf attributes are mandatory to implement */
5190 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
5191 memset(pathconf, 0, sizeof(*pathconf));
5192 return 0;
5193 }
5194
0e574af1 5195 nfs_fattr_init(pathconf->fattr);
7c513058 5196 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 5197}
5198
5199static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
5200 struct nfs_pathconf *pathconf)
5201{
0688e64b
TM		 5202 struct nfs4_exception exception = {
5203 .interruptible = true,
5204 };
1da177e4
LT		 5205 int err;
5206
5207 do {
5208 err = nfs4_handle_exception(server,
5209 _nfs4_proc_pathconf(server, fhandle, pathconf),
5210 &exception);
5211 } while (exception.retry);
5212 return err;
5213}
5214
5521abfd 5215int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 5216 const struct nfs_open_context *ctx,
5217 const struct nfs_lock_context *l_ctx,
5218 fmode_t fmode)
5219{
17393475 5220 return nfs4_select_rw_stateid(ctx->state, fmode, l_ctx, stateid, NULL);
9b206149
TM		 5221}
5222EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
5223
5521abfd
TM		 5224static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
5225 const struct nfs_open_context *ctx,
5226 const struct nfs_lock_context *l_ctx,
5227 fmode_t fmode)
5228{
d49dd117 5229 nfs4_stateid _current_stateid;
5521abfd 5230
e1253be0 5231 /* If the current stateid represents a lost lock, then exit */
d49dd117 5232 if (nfs4_set_rw_stateid(&_current_stateid, ctx, l_ctx, fmode) == -EIO)
e1253be0 5233 return true;
d49dd117 5234 return nfs4_stateid_match(stateid, &_current_stateid);
5521abfd
TM		 5235}
5236
5237static bool nfs4_error_stateid_expired(int err)
5238{
5239 switch (err) {
5240 case -NFS4ERR_DELEG_REVOKED:
5241 case -NFS4ERR_ADMIN_REVOKED:
5242 case -NFS4ERR_BAD_STATEID:
5243 case -NFS4ERR_STALE_STATEID:
5244 case -NFS4ERR_OLD_STATEID:
5245 case -NFS4ERR_OPENMODE:
5246 case -NFS4ERR_EXPIRED:
5247 return true;
5248 }
5249 return false;
5250}
5251
d45f60c6 5252static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
1da177e4 5253{
d45f60c6 5254 struct nfs_server *server = NFS_SERVER(hdr->inode);
1da177e4 5255
d45f60c6 5256 trace_nfs4_read(hdr, task->tk_status);
9c27869d
TM		 5257 if (task->tk_status < 0) {
5258 struct nfs4_exception exception = {
5259 .inode = hdr->inode,
5260 .state = hdr->args.context->state,
5261 .stateid = &hdr->args.stateid,
5262 };
5263 task->tk_status = nfs4_async_handle_exception(task,
5264 server, task->tk_status, &exception);
5265 if (exception.retry) {
5266 rpc_restart_call_prepare(task);
5267 return -EAGAIN;
5268 }
1da177e4 5269 }
8850df99 5270
1da177e4 5271 if (task->tk_status > 0)
d45f60c6 5272 renew_lease(server, hdr->timestamp);
ec06c096 5273 return 0;
1da177e4
LT		 5274}
5275
5521abfd 5276static bool nfs4_read_stateid_changed(struct rpc_task *task,
3c6b899c 5277 struct nfs_pgio_args *args)
5521abfd
TM		 5278{
5279
5280 if (!nfs4_error_stateid_expired(task->tk_status) ||
5281 nfs4_stateid_is_current(&args->stateid,
5282 args->context,
5283 args->lock_context,
5284 FMODE_READ))
5285 return false;
5286 rpc_restart_call_prepare(task);
5287 return true;
5288}
5289
c5675526
AS		 5290static bool nfs4_read_plus_not_supported(struct rpc_task *task,
5291 struct nfs_pgio_header *hdr)
cbdabc7f 5292{
c5675526
AS		 5293 struct nfs_server *server = NFS_SERVER(hdr->inode);
5294 struct rpc_message *msg = &task->tk_msg;
cbdabc7f 5295
c5675526
AS		 5296 if (msg->rpc_proc == &nfs4_procedures[NFSPROC4_CLNT_READ_PLUS] &&
5297 server->caps & NFS_CAP_READ_PLUS && task->tk_status == -ENOTSUPP) {
5298 server->caps &= ~NFS_CAP_READ_PLUS;
5299 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
5300 rpc_restart_call_prepare(task);
5301 return true;
5302 }
5303 return false;
5304}
5305
5306static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
5307{
cbdabc7f
AA		 5308 dprintk("--> %s\n", __func__);
5309
d45f60c6 5310 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
cbdabc7f 5311 return -EAGAIN;
d45f60c6 5312 if (nfs4_read_stateid_changed(task, &hdr->args))
5521abfd 5313 return -EAGAIN;
c5675526
AS		 5314 if (nfs4_read_plus_not_supported(task, hdr))
5315 return -EAGAIN;
bfc505de
TM		 5316 if (task->tk_status > 0)
5317 nfs_invalidate_atime(hdr->inode);
d45f60c6
WAA		 5318 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
5319 nfs4_read_done_cb(task, hdr);
cbdabc7f
AA		 5320}
5321
21e31401 5322#if defined CONFIG_NFS_V4_2 && defined CONFIG_NFS_V4_2_READ_PLUS
5c3485bb
TM		 5323static void nfs42_read_plus_support(struct nfs_pgio_header *hdr,
5324 struct rpc_message *msg)
c5675526 5325{
5c3485bb
TM		 5326 /* Note: We don't use READ_PLUS with pNFS yet */
5327 if (nfs_server_capable(hdr->inode, NFS_CAP_READ_PLUS) && !hdr->ds_clp)
c5675526 5328 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ_PLUS];
c5675526
AS		 5329}
5330#else
5c3485bb
TM		 5331static void nfs42_read_plus_support(struct nfs_pgio_header *hdr,
5332 struct rpc_message *msg)
c5675526 5333{
c5675526
AS		 5334}
5335#endif /* CONFIG_NFS_V4_2 */
5336
d45f60c6
WAA		 5337static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
5338 struct rpc_message *msg)
1da177e4 5339{
d45f60c6 5340 hdr->timestamp = jiffies;
ca857cc1
TM		 5341 if (!hdr->pgio_done_cb)
5342 hdr->pgio_done_cb = nfs4_read_done_cb;
5c3485bb
TM		 5343 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
5344 nfs42_read_plus_support(hdr, msg);
fba83f34 5345 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0, 0);
1da177e4
LT		 5346}
5347
d45f60c6
WAA		 5348static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
5349 struct nfs_pgio_header *hdr)
ea7c3303 5350{
42e1cca7 5351 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode)->nfs_client,
d45f60c6
WAA		 5352 &hdr->args.seq_args,
5353 &hdr->res.seq_res,
9b206149 5354 task))
ef1820f9 5355 return 0;
d45f60c6
WAA		 5356 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
5357 hdr->args.lock_context,
fbe77c30 5358 hdr->rw_mode) == -EIO)
ef1820f9 5359 return -EIO;
d45f60c6 5360 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
ef1820f9
N		 5361 return -EIO;
5362 return 0;
1da177e4
LT		 5363}
5364
d45f60c6
WAA		 5365static int nfs4_write_done_cb(struct rpc_task *task,
5366 struct nfs_pgio_header *hdr)
1da177e4 5367{
d45f60c6 5368 struct inode *inode = hdr->inode;
8478eaa1 5369
d45f60c6 5370 trace_nfs4_write(hdr, task->tk_status);
9c27869d
TM		 5371 if (task->tk_status < 0) {
5372 struct nfs4_exception exception = {
5373 .inode = hdr->inode,
5374 .state = hdr->args.context->state,
5375 .stateid = &hdr->args.stateid,
5376 };
5377 task->tk_status = nfs4_async_handle_exception(task,
5378 NFS_SERVER(inode), task->tk_status,
5379 &exception);
5380 if (exception.retry) {
5381 rpc_restart_call_prepare(task);
5382 return -EAGAIN;
5383 }
1da177e4 5384 }
4f9838c7 5385 if (task->tk_status >= 0) {
d45f60c6 5386 renew_lease(NFS_SERVER(inode), hdr->timestamp);
a08a8cd3 5387 nfs_writeback_update_inode(hdr);
4f9838c7 5388 }
788e7a89 5389 return 0;
1da177e4
LT		 5390}
5391
5521abfd 5392static bool nfs4_write_stateid_changed(struct rpc_task *task,
3c6b899c 5393 struct nfs_pgio_args *args)
5521abfd
TM		 5394{
5395
5396 if (!nfs4_error_stateid_expired(task->tk_status) ||
5397 nfs4_stateid_is_current(&args->stateid,
5398 args->context,
5399 args->lock_context,
5400 FMODE_WRITE))
5401 return false;
5402 rpc_restart_call_prepare(task);
5403 return true;
5404}
5405
d45f60c6 5406static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
b029bc9b 5407{
d45f60c6 5408 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
b029bc9b 5409 return -EAGAIN;
d45f60c6 5410 if (nfs4_write_stateid_changed(task, &hdr->args))
5521abfd 5411 return -EAGAIN;
d45f60c6
WAA		 5412 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
5413 nfs4_write_done_cb(task, hdr);
b029bc9b
FI		 5414}
5415
5a37f851 5416static
d45f60c6 5417bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
a69aef14 5418{
5a37f851 5419 /* Don't request attributes for pNFS or O_DIRECT writes */
d45f60c6 5420 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
5a37f851
TM		 5421 return false;
5422 /* Otherwise, request attributes if and only if we don't hold
5423 * a delegation
5424 */
011e2a7f 5425 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 5426}
a69aef14 5427
76bd5c01
OK		 5428static void nfs4_bitmask_adjust(__u32 *bitmask, struct inode *inode,
5429 struct nfs_server *server,
5430 struct nfs4_label *label)
5431{
5432
5433 unsigned long cache_validity = READ_ONCE(NFS_I(inode)->cache_validity);
5434
5435 if ((cache_validity & NFS_INO_INVALID_DATA) ||
5436 (cache_validity & NFS_INO_REVAL_PAGECACHE) ||
5437 (cache_validity & NFS_INO_REVAL_FORCED) ||
5438 (cache_validity & NFS_INO_INVALID_OTHER))
5439 nfs4_bitmap_copy_adjust(bitmask, nfs4_bitmask(server, label), inode);
5440
5441 if (cache_validity & NFS_INO_INVALID_ATIME)
5442 bitmask[1] |= FATTR4_WORD1_TIME_ACCESS;
5443 if (cache_validity & NFS_INO_INVALID_ACCESS)
5444 bitmask[0] |= FATTR4_WORD1_MODE | FATTR4_WORD1_OWNER |
5445 FATTR4_WORD1_OWNER_GROUP;
5446 if (cache_validity & NFS_INO_INVALID_ACL)
5447 bitmask[0] |= FATTR4_WORD0_ACL;
5448 if (cache_validity & NFS_INO_INVALID_LABEL)
5449 bitmask[2] |= FATTR4_WORD2_SECURITY_LABEL;
5450 if (cache_validity & NFS_INO_INVALID_CTIME)
5451 bitmask[0] |= FATTR4_WORD0_CHANGE;
5452 if (cache_validity & NFS_INO_INVALID_MTIME)
5453 bitmask[1] |= FATTR4_WORD1_TIME_MODIFY;
5454 if (cache_validity & NFS_INO_INVALID_SIZE)
5455 bitmask[0] |= FATTR4_WORD0_SIZE;
5456 if (cache_validity & NFS_INO_INVALID_BLOCKS)
5457 bitmask[1] |= FATTR4_WORD1_SPACE_USED;
5458}
5459
d45f60c6 5460static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
fb91fb0e
AS		 5461 struct rpc_message *msg,
5462 struct rpc_clnt **clnt)
1da177e4 5463{
d45f60c6 5464 struct nfs_server *server = NFS_SERVER(hdr->inode);
bdc7f021 5465
d45f60c6
WAA		 5466 if (!nfs4_write_need_cache_consistency_data(hdr)) {
5467 hdr->args.bitmask = NULL;
5468 hdr->res.fattr = NULL;
76bd5c01 5469 } else {
d45f60c6 5470 hdr->args.bitmask = server->cache_consistency_bitmask;
76bd5c01
OK		 5471 nfs4_bitmask_adjust(hdr->args.bitmask, hdr->inode, server, NULL);
5472 }
5a37f851 5473
d45f60c6
WAA		 5474 if (!hdr->pgio_done_cb)
5475 hdr->pgio_done_cb = nfs4_write_done_cb;
5476 hdr->res.server = server;
5477 hdr->timestamp = jiffies;
1da177e4 5478
bdc7f021 5479 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
cd1b659d 5480 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0, 0);
fb91fb0e 5481 nfs4_state_protect_write(server->nfs_client, clnt, msg, hdr);
1da177e4
LT		 5482}
5483
0b7c0153 5484static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 5485{
42e1cca7 5486 nfs4_setup_sequence(NFS_SERVER(data->inode)->nfs_client,
d9afbd1b
TM		 5487 &data->args.seq_args,
5488 &data->res.seq_res,
5489 task);
1da177e4
LT		 5490}
5491
0b7c0153 5492static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 5493{
1da177e4 5494 struct inode *inode = data->inode;
14516c3a 5495
cc668ab3 5496 trace_nfs4_commit(data, task->tk_status);
8478eaa1
N		 5497 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
5498 NULL, NULL) == -EAGAIN) {
d00c5d43 5499 rpc_restart_call_prepare(task);
788e7a89 5500 return -EAGAIN;
1da177e4 5501 }
788e7a89 5502 return 0;
1da177e4
LT		 5503}
5504
0b7c0153 5505static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 5506{
5507 if (!nfs4_sequence_done(task, &data->res.seq_res))
5508 return -EAGAIN;
0b7c0153 5509 return data->commit_done_cb(task, data);
5f452431
FI		 5510}
5511
e9ae1ee2
AS		 5512static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg,
5513 struct rpc_clnt **clnt)
1da177e4 5514{
788e7a89 5515 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 5516
0b7c0153
FI		 5517 if (data->commit_done_cb == NULL)
5518 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 5519 data->res.server = server;
bdc7f021 5520 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
fba83f34 5521 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 0);
e9ae1ee2 5522 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_COMMIT, clnt, msg);
1da177e4
LT		 5523}
5524
6b8d84e2
OK		 5525static int _nfs4_proc_commit(struct file *dst, struct nfs_commitargs *args,
5526 struct nfs_commitres *res)
5527{
5528 struct inode *dst_inode = file_inode(dst);
5529 struct nfs_server *server = NFS_SERVER(dst_inode);
5530 struct rpc_message msg = {
5531 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT],
5532 .rpc_argp = args,
5533 .rpc_resp = res,
5534 };
5535
5536 args->fh = NFS_FH(dst_inode);
5537 return nfs4_call_sync(server->client, server, &msg,
5538 &args->seq_args, &res->seq_res, 1);
5539}
5540
5541int nfs4_proc_commit(struct file *dst, __u64 offset, __u32 count, struct nfs_commitres *res)
5542{
5543 struct nfs_commitargs args = {
5544 .offset = offset,
5545 .count = count,
5546 };
5547 struct nfs_server *dst_server = NFS_SERVER(file_inode(dst));
5548 struct nfs4_exception exception = { };
5549 int status;
5550
5551 do {
5552 status = _nfs4_proc_commit(dst, &args, res);
5553 status = nfs4_handle_exception(dst_server, status, &exception);
5554 } while (exception.retry);
5555
5556 return status;
5557}
5558
9bc4e3ca
CL		 5559struct nfs4_renewdata {
5560 struct nfs_client *client;
5561 unsigned long timestamp;
5562};
5563
1da177e4
LT		 5564/*
5565 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
5566 * standalone procedure for queueing an asynchronous RENEW.
5567 */
9bc4e3ca 5568static void nfs4_renew_release(void *calldata)
dc96aef9 5569{
9bc4e3ca
CL		 5570 struct nfs4_renewdata *data = calldata;
5571 struct nfs_client *clp = data->client;
dc96aef9 5572
212bf41d 5573 if (refcount_read(&clp->cl_count) > 1)
0851de06
AB		 5574 nfs4_schedule_state_renewal(clp);
5575 nfs_put_client(clp);
9bc4e3ca 5576 kfree(data);
dc96aef9
AB		 5577}
5578
9bc4e3ca 5579static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 5580{
9bc4e3ca
CL		 5581 struct nfs4_renewdata *data = calldata;
5582 struct nfs_client *clp = data->client;
5583 unsigned long timestamp = data->timestamp;
1da177e4 5584
c6d01c6f 5585 trace_nfs4_renew_async(clp, task->tk_status);
f8aba1e8
CL		 5586 switch (task->tk_status) {
5587 case 0:
5588 break;
5589 case -NFS4ERR_LEASE_MOVED:
5590 nfs4_schedule_lease_moved_recovery(clp);
5591 break;
5592 default:
95baa25c 5593 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 5594 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
5595 return;
5596 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 5597 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 5598 return;
5599 }
5600 nfs4_schedule_path_down_recovery(clp);
1da177e4 5601 }
452e9352 5602 do_renew_lease(clp, timestamp);
1da177e4
LT		 5603}
5604
963d8fe5
TM		 5605static const struct rpc_call_ops nfs4_renew_ops = {
5606 .rpc_call_done = nfs4_renew_done,
dc96aef9 5607 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 5608};
5609
a52458b4 5610static int nfs4_proc_async_renew(struct nfs_client *clp, const struct cred *cred, unsigned renew_flags)
1da177e4
LT		 5611{
5612 struct rpc_message msg = {
5613 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
5614 .rpc_argp = clp,
b4454fe1 5615 .rpc_cred = cred,
1da177e4 5616 };
9bc4e3ca 5617 struct nfs4_renewdata *data;
1da177e4 5618
2f60ea6b
TM		 5619 if (renew_flags == 0)
5620 return 0;
212bf41d 5621 if (!refcount_inc_not_zero(&clp->cl_count))
0851de06 5622 return -EIO;
b569ad34 5623 data = kmalloc(sizeof(*data), GFP_NOFS);
5c737cb2
DW		 5624 if (data == NULL) {
5625 nfs_put_client(clp);
9bc4e3ca 5626 return -ENOMEM;
5c737cb2 5627 }
9bc4e3ca
CL		 5628 data->client = clp;
5629 data->timestamp = jiffies;
bc7a05ca 5630 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 5631 &nfs4_renew_ops, data);
1da177e4
LT		 5632}
5633
a52458b4 5634static int nfs4_proc_renew(struct nfs_client *clp, const struct cred *cred)
1da177e4
LT		 5635{
5636 struct rpc_message msg = {
5637 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
5638 .rpc_argp = clp,
b4454fe1 5639 .rpc_cred = cred,
1da177e4
LT		 5640 };
5641 unsigned long now = jiffies;
5642 int status;
5643
bc7a05ca 5644 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 5645 if (status < 0)
5646 return status;
452e9352 5647 do_renew_lease(clp, now);
1da177e4
LT		 5648 return 0;
5649}
5650
aa1870af
BF		 5651static inline int nfs4_server_supports_acls(struct nfs_server *server)
5652{
7dd7d959 5653 return server->caps & NFS_CAP_ACLS;
aa1870af
BF		 5654}
5655
21f498c2
TM		 5656/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
5657 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 5658 * the stack.
5659 */
21f498c2 5660#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 5661
ccde1e9c 5662int nfs4_buf_to_pages_noslab(const void *buf, size_t buflen,
8fbcf237 5663 struct page **pages)
e9e3d724
NH		 5664{
5665 struct page *newpage, **spages;
5666 int rc = 0;
5667 size_t len;
5668 spages = pages;
5669
5670 do {
21f498c2 5671 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 5672 newpage = alloc_page(GFP_KERNEL);
5673
5674 if (newpage == NULL)
5675 goto unwind;
5676 memcpy(page_address(newpage), buf, len);
d9b67e1e
AS		 5677 buf += len;
5678 buflen -= len;
e9e3d724
NH		 5679 *pages++ = newpage;
5680 rc++;
5681 } while (buflen != 0);
5682
5683 return rc;
5684
5685unwind:
5686 for(; rc > 0; rc--)
5687 __free_page(spages[rc-1]);
5688 return -ENOMEM;
5689}
5690
e50a1c2e
BF		 5691struct nfs4_cached_acl {
5692 int cached;
5693 size_t len;
5601cda8 5694 char data[];
e50a1c2e
BF		 5695};
5696
5697static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
5698{
5699 struct nfs_inode *nfsi = NFS_I(inode);
5700
5701 spin_lock(&inode->i_lock);
5702 kfree(nfsi->nfs4_acl);
5703 nfsi->nfs4_acl = acl;
5704 spin_unlock(&inode->i_lock);
5705}
5706
5707static void nfs4_zap_acl_attr(struct inode *inode)
5708{
5709 nfs4_set_cached_acl(inode, NULL);
5710}
5711
5712static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
5713{
5714 struct nfs_inode *nfsi = NFS_I(inode);
5715 struct nfs4_cached_acl *acl;
5716 int ret = -ENOENT;
5717
5718 spin_lock(&inode->i_lock);
5719 acl = nfsi->nfs4_acl;
5720 if (acl == NULL)
5721 goto out;
5722 if (buf == NULL) /* user is just asking for length */
5723 goto out_len;
5724 if (acl->cached == 0)
5725 goto out;
5726 ret = -ERANGE; /* see getxattr(2) man page */
5727 if (acl->len > buflen)
5728 goto out;
5729 memcpy(buf, acl->data, acl->len);
5730out_len:
5731 ret = acl->len;
5732out:
5733 spin_unlock(&inode->i_lock);
5734 return ret;
5735}
5736
5794d21e 5737static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 5738{
5739 struct nfs4_cached_acl *acl;
b291f1b1 5740 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 5741
1f1ea6c2 5742 if (buflen <= PAGE_SIZE) {
b291f1b1 5743 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 5744 if (acl == NULL)
5745 goto out;
5746 acl->cached = 1;
5794d21e 5747 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 5748 } else {
5749 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
5750 if (acl == NULL)
5751 goto out;
5752 acl->cached = 0;
5753 }
5754 acl->len = acl_len;
5755out:
5756 nfs4_set_cached_acl(inode, acl);
5757}
5758
bf118a34
AA		 5759/*
5760 * The getxattr API returns the required buffer length when called with a
5761 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
5762 * the required buf. On a NULL buf, we send a page of data to the server
5763 * guessing that the ACL request can be serviced by a page. If so, we cache
5764 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
5765 * the cache. If not so, we throw away the page, and cache the required
5766 * length. The next getxattr call will then produce another round trip to
5767 * the server, this time with the input buf of the required size.
5768 */
16b4289c 5769static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 5770{
62a1573f 5771 struct page **pages;
aa1870af
BF		 5772 struct nfs_getaclargs args = {
5773 .fh = NFS_FH(inode),
aa1870af
BF		 5774 .acl_len = buflen,
5775 };
663c79b3
BH		 5776 struct nfs_getaclres res = {
5777 .acl_len = buflen,
5778 };
aa1870af
BF		 5779 struct rpc_message msg = {
5780 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
5781 .rpc_argp = &args,
663c79b3 5782 .rpc_resp = &res,
aa1870af 5783 };
62a1573f 5784 unsigned int npages;
21f498c2 5785 int ret = -ENOMEM, i;
62a1573f
OK		 5786 struct nfs_server *server = NFS_SERVER(inode);
5787
5788 if (buflen == 0)
5789 buflen = server->rsize;
5790
5791 npages = DIV_ROUND_UP(buflen, PAGE_SIZE) + 1;
5792 pages = kmalloc_array(npages, sizeof(struct page *), GFP_NOFS);
5793 if (!pages)
5794 return -ENOMEM;
aa1870af 5795
62a1573f 5796 args.acl_pages = pages;
5a006899 5797
bf118a34
AA		 5798 for (i = 0; i < npages; i++) {
5799 pages[i] = alloc_page(GFP_KERNEL);
5800 if (!pages[i])
5801 goto out_free;
e50a1c2e 5802 }
5a006899
SP		 5803
5804 /* for decoding across pages */
5805 res.acl_scratch = alloc_page(GFP_KERNEL);
5806 if (!res.acl_scratch)
5807 goto out_free;
5808
bf118a34 5809 args.acl_len = npages * PAGE_SIZE;
5a006899 5810
de040bec 5811 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 5812 __func__, buf, buflen, npages, args.acl_len);
5813 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
5814 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 5815 if (ret)
5816 goto out_free;
bf118a34 5817
1f1ea6c2
TM		 5818 /* Handle the case where the passed-in buffer is too short */
5819 if (res.acl_flags & NFS4_ACL_TRUNC) {
5820 /* Did the user only issue a request for the acl length? */
5821 if (buf == NULL)
5822 goto out_ok;
e50a1c2e 5823 ret = -ERANGE;
1f1ea6c2 5824 goto out_free;
e50a1c2e 5825 }
1f1ea6c2 5826 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 5827 if (buf) {
5828 if (res.acl_len > buflen) {
5829 ret = -ERANGE;
5830 goto out_free;
5831 }
1f1ea6c2 5832 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 5833 }
1f1ea6c2
TM		 5834out_ok:
5835 ret = res.acl_len;
e50a1c2e 5836out_free:
bf118a34
AA		 5837 for (i = 0; i < npages; i++)
5838 if (pages[i])
5839 __free_page(pages[i]);
331818f1
TM		 5840 if (res.acl_scratch)
5841 __free_page(res.acl_scratch);
62a1573f 5842 kfree(pages);
aa1870af
BF		 5843 return ret;
5844}
5845
16b4289c
TM		 5846static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
5847{
0688e64b
TM		 5848 struct nfs4_exception exception = {
5849 .interruptible = true,
5850 };
16b4289c
TM		 5851 ssize_t ret;
5852 do {
5853 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
c1578b76 5854 trace_nfs4_get_acl(inode, ret);
16b4289c
TM		 5855 if (ret >= 0)
5856 break;
5857 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
5858 } while (exception.retry);
5859 return ret;
5860}
5861
e50a1c2e
BF		 5862static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
5863{
5864 struct nfs_server *server = NFS_SERVER(inode);
5865 int ret;
5866
5867 if (!nfs4_server_supports_acls(server))
5868 return -EOPNOTSUPP;
5869 ret = nfs_revalidate_inode(server, inode);
5870 if (ret < 0)
5871 return ret;
08a22b39
AK		 5872 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
5873 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 5874 ret = nfs4_read_cached_acl(inode, buf, buflen);
5875 if (ret != -ENOENT)
bf118a34
AA		 5876 /* -ENOENT is returned if there is no ACL or if there is an ACL
5877 * but no cached acl data, just the acl length */
e50a1c2e
BF		 5878 return ret;
5879 return nfs4_get_acl_uncached(inode, buf, buflen);
5880}
5881
16b4289c 5882static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 5883{
5884 struct nfs_server *server = NFS_SERVER(inode);
5885 struct page *pages[NFS4ACL_MAXPAGES];
5886 struct nfs_setaclargs arg = {
5887 .fh = NFS_FH(inode),
5888 .acl_pages = pages,
5889 .acl_len = buflen,
5890 };
73c403a9 5891 struct nfs_setaclres res;
4b580ee3
BF		 5892 struct rpc_message msg = {
5893 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
5894 .rpc_argp = &arg,
73c403a9 5895 .rpc_resp = &res,
4b580ee3 5896 };
21f498c2 5897 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 5898 int ret, i;
4b580ee3
BF		 5899
5900 if (!nfs4_server_supports_acls(server))
5901 return -EOPNOTSUPP;
21f498c2
TM		 5902 if (npages > ARRAY_SIZE(pages))
5903 return -ERANGE;
ccde1e9c 5904 i = nfs4_buf_to_pages_noslab(buf, buflen, arg.acl_pages);
e9e3d724
NH		 5905 if (i < 0)
5906 return i;
c01d3645 5907 nfs4_inode_make_writeable(inode);
7c513058 5908 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 5909
5910 /*
5911 * Free each page after tx, so the only ref left is
5912 * held by the network stack
5913 */
5914 for (; i > 0; i--)
5915 put_page(pages[i-1]);
5916
08a22b39
AK		 5917 /*
5918 * Acl update can result in inode attribute update.
5919 * so mark the attribute cache invalid.
5920 */
5921 spin_lock(&inode->i_lock);
16e14375 5922 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_CHANGE
472f761e
TM		 5923 | NFS_INO_INVALID_CTIME
5924 | NFS_INO_REVAL_FORCED;
08a22b39 5925 spin_unlock(&inode->i_lock);
f41f7418
TM		 5926 nfs_access_zap_cache(inode);
5927 nfs_zap_acl_cache(inode);
4b580ee3
BF		 5928 return ret;
5929}
5930
16b4289c
TM		 5931static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
5932{
5933 struct nfs4_exception exception = { };
5934 int err;
5935 do {
c1578b76
TM		 5936 err = __nfs4_proc_set_acl(inode, buf, buflen);
5937 trace_nfs4_set_acl(inode, err);
5938 err = nfs4_handle_exception(NFS_SERVER(inode), err,
16b4289c
TM		 5939 &exception);
5940 } while (exception.retry);
5941 return err;
5942}
5943
aa9c2669
DQ		 5944#ifdef CONFIG_NFS_V4_SECURITY_LABEL
5945static int _nfs4_get_security_label(struct inode *inode, void *buf,
5946 size_t buflen)
5947{
5948 struct nfs_server *server = NFS_SERVER(inode);
5949 struct nfs_fattr fattr;
5950 struct nfs4_label label = {0, 0, buflen, buf};
5951
5952 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
fcb63a9b 5953 struct nfs4_getattr_arg arg = {
aa9c2669
DQ		 5954 .fh = NFS_FH(inode),
5955 .bitmask = bitmask,
5956 };
5957 struct nfs4_getattr_res res = {
5958 .fattr = &fattr,
5959 .label = &label,
5960 .server = server,
5961 };
5962 struct rpc_message msg = {
5963 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
fcb63a9b 5964 .rpc_argp = &arg,
aa9c2669
DQ		 5965 .rpc_resp = &res,
5966 };
5967 int ret;
5968
5969 nfs_fattr_init(&fattr);
5970
fcb63a9b 5971 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
aa9c2669
DQ		 5972 if (ret)
5973 return ret;
5974 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
5975 return -ENOENT;
aa9c2669
DQ		 5976 return 0;
5977}
5978
5979static int nfs4_get_security_label(struct inode *inode, void *buf,
5980 size_t buflen)
5981{
0688e64b
TM		 5982 struct nfs4_exception exception = {
5983 .interruptible = true,
5984 };
aa9c2669
DQ		 5985 int err;
5986
5987 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
5988 return -EOPNOTSUPP;
5989
5990 do {
c1578b76
TM		 5991 err = _nfs4_get_security_label(inode, buf, buflen);
5992 trace_nfs4_get_security_label(inode, err);
5993 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 5994 &exception);
5995 } while (exception.retry);
5996 return err;
5997}
5998
5999static int _nfs4_do_set_security_label(struct inode *inode,
6000 struct nfs4_label *ilabel,
6001 struct nfs_fattr *fattr,
6002 struct nfs4_label *olabel)
6003{
6004
6005 struct iattr sattr = {0};
6006 struct nfs_server *server = NFS_SERVER(inode);
6007 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
12207f69 6008 struct nfs_setattrargs arg = {
d9b67e1e
AS		 6009 .fh = NFS_FH(inode),
6010 .iap = &sattr,
aa9c2669
DQ		 6011 .server = server,
6012 .bitmask = bitmask,
6013 .label = ilabel,
6014 };
6015 struct nfs_setattrres res = {
6016 .fattr = fattr,
6017 .label = olabel,
6018 .server = server,
6019 };
6020 struct rpc_message msg = {
d9b67e1e
AS		 6021 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
6022 .rpc_argp = &arg,
6023 .rpc_resp = &res,
aa9c2669
DQ		 6024 };
6025 int status;
6026
12207f69 6027 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
aa9c2669 6028
12207f69 6029 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
aa9c2669
DQ		 6030 if (status)
6031 dprintk("%s failed: %d\n", __func__, status);
6032
6033 return status;
6034}
6035
6036static int nfs4_do_set_security_label(struct inode *inode,
6037 struct nfs4_label *ilabel,
6038 struct nfs_fattr *fattr,
6039 struct nfs4_label *olabel)
6040{
6041 struct nfs4_exception exception = { };
6042 int err;
6043
6044 do {
c1578b76
TM		 6045 err = _nfs4_do_set_security_label(inode, ilabel,
6046 fattr, olabel);
6047 trace_nfs4_set_security_label(inode, err);
6048 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 6049 &exception);
6050 } while (exception.retry);
6051 return err;
6052}
6053
6054static int
59301226 6055nfs4_set_security_label(struct inode *inode, const void *buf, size_t buflen)
aa9c2669
DQ		 6056{
6057 struct nfs4_label ilabel, *olabel = NULL;
6058 struct nfs_fattr fattr;
aa9c2669
DQ		 6059 int status;
6060
6061 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
6062 return -EOPNOTSUPP;
6063
6064 nfs_fattr_init(&fattr);
6065
6066 ilabel.pi = 0;
6067 ilabel.lfs = 0;
6068 ilabel.label = (char *)buf;
6069 ilabel.len = buflen;
6070
aa9c2669
DQ		 6071 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
6072 if (IS_ERR(olabel)) {
6073 status = -PTR_ERR(olabel);
6074 goto out;
6075 }
6076
6077 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
6078 if (status == 0)
6079 nfs_setsecurity(inode, &fattr, olabel);
6080
6081 nfs4_label_free(olabel);
6082out:
aa9c2669
DQ		 6083 return status;
6084}
6085#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
6086
6087
f092075d
CL		 6088static void nfs4_init_boot_verifier(const struct nfs_client *clp,
6089 nfs4_verifier *bootverf)
cd93710e
CL		 6090{
6091 __be32 verf[2];
6092
2c820d9a
CL		 6093 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
6094 /* An impossible timestamp guarantees this value
6095 * will never match a generated boot time. */
2f86e091
DD		 6096 verf[0] = cpu_to_be32(U32_MAX);
6097 verf[1] = cpu_to_be32(U32_MAX);
2c820d9a 6098 } else {
f092075d 6099 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
2f86e091
DD		 6100 u64 ns = ktime_to_ns(nn->boot_time);
6101
6102 verf[0] = cpu_to_be32(ns >> 32);
6103 verf[1] = cpu_to_be32(ns);
2c820d9a 6104 }
cd93710e
CL		 6105 memcpy(bootverf->data, verf, sizeof(bootverf->data));
6106}
6107
1aee5513 6108static size_t
39d43d16 6109nfs4_get_uniquifier(struct nfs_client *clp, char *buf, size_t buflen)
1aee5513 6110{
39d43d16
TM		 6111 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
6112 struct nfs_netns_client *nn_clp = nn->nfs_client;
6113 const char *id;
6114
1aee5513
TM		 6115 buf[0] = '\0';
6116
39d43d16
TM		 6117 if (nn_clp) {
6118 rcu_read_lock();
6119 id = rcu_dereference(nn_clp->identifier);
6120 if (id)
6121 strscpy(buf, id, buflen);
6122 rcu_read_unlock();
6123 }
6124
6125 if (nfs4_client_id_uniquifier[0] != '\0' && buf[0] == '\0')
1aee5513
TM		 6126 strscpy(buf, nfs4_client_id_uniquifier, buflen);
6127
6128 return strlen(buf);
6129}
6130
a3192688
JL		 6131static int
6132nfs4_init_nonuniform_client_string(struct nfs_client *clp)
e984a55a 6133{
1aee5513
TM		 6134 char buf[NFS4_CLIENT_ID_UNIQ_LEN];
6135 size_t buflen;
a3192688
JL		 6136 size_t len;
6137 char *str;
e984a55a 6138
ceb3a16c 6139 if (clp->cl_owner_id != NULL)
a3192688 6140 return 0;
4a3e5779 6141
a3192688 6142 rcu_read_lock();
848a4eb2
CL		 6143 len = 14 +
6144 strlen(clp->cl_rpcclient->cl_nodename) +
6145 1 +
a3192688 6146 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) +
a3192688
JL		 6147 1;
6148 rcu_read_unlock();
1aee5513 6149
39d43d16 6150 buflen = nfs4_get_uniquifier(clp, buf, sizeof(buf));
1aee5513
TM		 6151 if (buflen)
6152 len += buflen + 1;
6153
a3192688
JL		 6154 if (len > NFS4_OPAQUE_LIMIT + 1)
6155 return -EINVAL;
6156
6157 /*
6158 * Since this string is allocated at mount time, and held until the
6159 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
6160 * about a memory-reclaim deadlock.
6161 */
6162 str = kmalloc(len, GFP_KERNEL);
6163 if (!str)
6164 return -ENOMEM;
ceb3a16c 6165
e984a55a 6166 rcu_read_lock();
1aee5513 6167 if (buflen)
025bb9f8 6168 scnprintf(str, len, "Linux NFSv4.0 %s/%s/%s",
1aee5513 6169 clp->cl_rpcclient->cl_nodename, buf,
848a4eb2 6170 rpc_peeraddr2str(clp->cl_rpcclient,
025bb9f8 6171 RPC_DISPLAY_ADDR));
848a4eb2 6172 else
025bb9f8 6173 scnprintf(str, len, "Linux NFSv4.0 %s/%s",
848a4eb2
CL		 6174 clp->cl_rpcclient->cl_nodename,
6175 rpc_peeraddr2str(clp->cl_rpcclient,
025bb9f8 6176 RPC_DISPLAY_ADDR));
e984a55a 6177 rcu_read_unlock();
a3192688 6178
a3192688
JL		 6179 clp->cl_owner_id = str;
6180 return 0;
e984a55a
CL		 6181}
6182
873e3851
JL		 6183static int
6184nfs4_init_uniform_client_string(struct nfs_client *clp)
e984a55a 6185{
1aee5513
TM		 6186 char buf[NFS4_CLIENT_ID_UNIQ_LEN];
6187 size_t buflen;
873e3851
JL		 6188 size_t len;
6189 char *str;
ceb3a16c
TM		 6190
6191 if (clp->cl_owner_id != NULL)
873e3851 6192 return 0;
6f2ea7f2 6193
873e3851
JL		 6194 len = 10 + 10 + 1 + 10 + 1 +
6195 strlen(clp->cl_rpcclient->cl_nodename) + 1;
6196
39d43d16 6197 buflen = nfs4_get_uniquifier(clp, buf, sizeof(buf));
1aee5513
TM		 6198 if (buflen)
6199 len += buflen + 1;
6200
873e3851
JL		 6201 if (len > NFS4_OPAQUE_LIMIT + 1)
6202 return -EINVAL;
6203
6204 /*
6205 * Since this string is allocated at mount time, and held until the
6206 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
6207 * about a memory-reclaim deadlock.
6208 */
6209 str = kmalloc(len, GFP_KERNEL);
6210 if (!str)
6211 return -ENOMEM;
6212
1aee5513
TM		 6213 if (buflen)
6214 scnprintf(str, len, "Linux NFSv%u.%u %s/%s",
6215 clp->rpc_ops->version, clp->cl_minorversion,
6216 buf, clp->cl_rpcclient->cl_nodename);
6217 else
6218 scnprintf(str, len, "Linux NFSv%u.%u %s",
6219 clp->rpc_ops->version, clp->cl_minorversion,
6220 clp->cl_rpcclient->cl_nodename);
873e3851
JL		 6221 clp->cl_owner_id = str;
6222 return 0;
e984a55a
CL		 6223}
6224
706cb8db
CL		 6225/*
6226 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
6227 * services. Advertise one based on the address family of the
6228 * clientaddr.
6229 */
6230static unsigned int
6231nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
6232{
6233 if (strchr(clp->cl_ipaddr, ':') != NULL)
6234 return scnprintf(buf, len, "tcp6");
6235 else
6236 return scnprintf(buf, len, "tcp");
6237}
6238
f11b2a1c
JL		 6239static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
6240{
6241 struct nfs4_setclientid *sc = calldata;
6242
6243 if (task->tk_status == 0)
6244 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
6245}
6246
6247static const struct rpc_call_ops nfs4_setclientid_ops = {
6248 .rpc_call_done = nfs4_setclientid_done,
6249};
6250
6bbb4ae8
CL		 6251/**
6252 * nfs4_proc_setclientid - Negotiate client ID
6253 * @clp: state data structure
6254 * @program: RPC program for NFSv4 callback service
6255 * @port: IP port number for NFS4 callback service
a52458b4 6256 * @cred: credential to use for this call
6bbb4ae8
CL		 6257 * @res: where to place the result
6258 *
6259 * Returns zero, a negative errno, or a negative NFS4ERR status code.
6260 */
bb8b27e5 6261int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
a52458b4 6262 unsigned short port, const struct cred *cred,
bb8b27e5 6263 struct nfs4_setclientid_res *res)
1da177e4
LT		 6264{
6265 nfs4_verifier sc_verifier;
6266 struct nfs4_setclientid setclientid = {
6267 .sc_verifier = &sc_verifier,
6268 .sc_prog = program,
3a6bb738 6269 .sc_clnt = clp,
1da177e4
LT		 6270 };
6271 struct rpc_message msg = {
6272 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
6273 .rpc_argp = &setclientid,
bb8b27e5 6274 .rpc_resp = res,
286d7d6a 6275 .rpc_cred = cred,
1da177e4 6276 };
f11b2a1c
JL		 6277 struct rpc_task_setup task_setup_data = {
6278 .rpc_client = clp->cl_rpcclient,
6279 .rpc_message = &msg,
6280 .callback_ops = &nfs4_setclientid_ops,
6281 .callback_data = &setclientid,
5a0c257f 6282 .flags = RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN,
f11b2a1c 6283 };
7dc2993a 6284 unsigned long now = jiffies;
6bbb4ae8 6285 int status;
1da177e4 6286
de734831 6287 /* nfs_client_id4 */
f092075d 6288 nfs4_init_boot_verifier(clp, &sc_verifier);
873e3851
JL		 6289
6290 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
6291 status = nfs4_init_uniform_client_string(clp);
6292 else
a3192688 6293 status = nfs4_init_nonuniform_client_string(clp);
873e3851
JL		 6294
6295 if (status)
6296 goto out;
3a6bb738 6297
de734831 6298 /* cb_client4 */
706cb8db
CL		 6299 setclientid.sc_netid_len =
6300 nfs4_init_callback_netid(clp,
6301 setclientid.sc_netid,
6302 sizeof(setclientid.sc_netid));
de734831 6303 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 6304 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 6305 clp->cl_ipaddr, port >> 8, port & 255);
6306
3a6bb738 6307 dprintk("NFS call setclientid auth=%s, '%s'\n",
6bbb4ae8 6308 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3a6bb738 6309 clp->cl_owner_id);
dae40965
AS		 6310
6311 status = nfs4_call_sync_custom(&task_setup_data);
f11b2a1c 6312 if (setclientid.sc_cred) {
1047ec86 6313 kfree(clp->cl_acceptor);
f11b2a1c
JL		 6314 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
6315 put_rpccred(setclientid.sc_cred);
6316 }
7dc2993a
RM		 6317
6318 if (status == 0)
6319 do_renew_lease(clp, now);
f11b2a1c 6320out:
c6d01c6f 6321 trace_nfs4_setclientid(clp, status);
6bbb4ae8
CL		 6322 dprintk("NFS reply setclientid: %d\n", status);
6323 return status;
1da177e4
LT		 6324}
6325
6bbb4ae8
CL		 6326/**
6327 * nfs4_proc_setclientid_confirm - Confirm client ID
6328 * @clp: state data structure
302fad7b 6329 * @arg: result of a previous SETCLIENTID
a52458b4 6330 * @cred: credential to use for this call
6bbb4ae8
CL		 6331 *
6332 * Returns zero, a negative errno, or a negative NFS4ERR status code.
6333 */
fd954ae1 6334int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5 6335 struct nfs4_setclientid_res *arg,
a52458b4 6336 const struct cred *cred)
1da177e4 6337{
1da177e4
LT		 6338 struct rpc_message msg = {
6339 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 6340 .rpc_argp = arg,
286d7d6a 6341 .rpc_cred = cred,
1da177e4 6342 };
1da177e4
LT		 6343 int status;
6344
6bbb4ae8
CL		 6345 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
6346 clp->cl_rpcclient->cl_auth->au_ops->au_name,
6347 clp->cl_clientid);
5a0c257f
N		 6348 status = rpc_call_sync(clp->cl_rpcclient, &msg,
6349 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN);
c6d01c6f 6350 trace_nfs4_setclientid_confirm(clp, status);
6bbb4ae8 6351 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 6352 return status;
6353}
6354
fe650407
TM		 6355struct nfs4_delegreturndata {
6356 struct nfs4_delegreturnargs args;
fa178f29 6357 struct nfs4_delegreturnres res;
fe650407
TM		 6358 struct nfs_fh fh;
6359 nfs4_stateid stateid;
26e976a8 6360 unsigned long timestamp;
586f1c39
TM		 6361 struct {
6362 struct nfs4_layoutreturn_args arg;
6363 struct nfs4_layoutreturn_res res;
4d796d75 6364 struct nfs4_xdr_opaque_data ld_private;
586f1c39
TM		 6365 u32 roc_barrier;
6366 bool roc;
6367 } lr;
fa178f29 6368 struct nfs_fattr fattr;
fe650407 6369 int rpc_status;
039b756a 6370 struct inode *inode;
fe650407
TM		 6371};
6372
fe650407
TM		 6373static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
6374{
6375 struct nfs4_delegreturndata *data = calldata;
e0dba012
TM		 6376 struct nfs4_exception exception = {
6377 .inode = data->inode,
6378 .stateid = &data->stateid,
6379 };
938e1010 6380
14516c3a
TM		 6381 if (!nfs4_sequence_done(task, &data->res.seq_res))
6382 return;
938e1010 6383
ca8acf8d 6384 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
586f1c39
TM		 6385
6386 /* Handle Layoutreturn errors */
287a9c55
TM		 6387 if (pnfs_roc_done(task, data->inode,
6388 &data->args.lr_args,
6389 &data->res.lr_res,
6390 &data->res.lr_ret) == -EAGAIN)
6391 goto out_restart;
586f1c39 6392
79708861 6393 switch (task->tk_status) {
79708861 6394 case 0:
fa178f29 6395 renew_lease(data->res.server, data->timestamp);
23ea44c2 6396 break;
c97cf606
TM		 6397 case -NFS4ERR_ADMIN_REVOKED:
6398 case -NFS4ERR_DELEG_REVOKED:
26d36301
TM		 6399 case -NFS4ERR_EXPIRED:
6400 nfs4_free_revoked_stateid(data->res.server,
6401 data->args.stateid,
6402 task->tk_msg.rpc_cred);
df561f66 6403 fallthrough;
c97cf606 6404 case -NFS4ERR_BAD_STATEID:
c97cf606 6405 case -NFS4ERR_STALE_STATEID:
244fcd2f 6406 case -ETIMEDOUT:
c97cf606
TM		 6407 task->tk_status = 0;
6408 break;
12f275cd 6409 case -NFS4ERR_OLD_STATEID:
246afc0a
TM		 6410 if (!nfs4_refresh_delegation_stateid(&data->stateid, data->inode))
6411 nfs4_stateid_seqid_inc(&data->stateid);
70d136b2
TM		 6412 if (data->args.bitmask) {
6413 data->args.bitmask = NULL;
6414 data->res.fattr = NULL;
6415 }
246afc0a 6416 goto out_restart;
8ac2b422
TM		 6417 case -NFS4ERR_ACCESS:
6418 if (data->args.bitmask) {
6419 data->args.bitmask = NULL;
6420 data->res.fattr = NULL;
140087fd 6421 goto out_restart;
8ac2b422 6422 }
df561f66 6423 fallthrough;
79708861 6424 default:
e0dba012
TM		 6425 task->tk_status = nfs4_async_handle_exception(task,
6426 data->res.server, task->tk_status,
6427 &exception);
6428 if (exception.retry)
140087fd 6429 goto out_restart;
79708861 6430 }
d51f91d2 6431 nfs_delegation_mark_returned(data->inode, data->args.stateid);
79708861 6432 data->rpc_status = task->tk_status;
140087fd 6433 return;
140087fd
TM		 6434out_restart:
6435 task->tk_status = 0;
6436 rpc_restart_call_prepare(task);
fe650407
TM		 6437}
6438
6439static void nfs4_delegreturn_release(void *calldata)
6440{
039b756a 6441 struct nfs4_delegreturndata *data = calldata;
ea7c38fe 6442 struct inode *inode = data->inode;
039b756a 6443
ea7c38fe 6444 if (inode) {
586f1c39 6445 if (data->lr.roc)
1c5bd76d
TM		 6446 pnfs_roc_release(&data->lr.arg, &data->lr.res,
6447 data->res.lr_ret);
0bc2c9b4 6448 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
ea7c38fe
TM		 6449 nfs_iput_and_deactive(inode);
6450 }
fe650407
TM		 6451 kfree(calldata);
6452}
6453
938e1010
AA		 6454static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
6455{
6456 struct nfs4_delegreturndata *d_data;
c8bf7073 6457 struct pnfs_layout_hdr *lo;
938e1010
AA		 6458
6459 d_data = (struct nfs4_delegreturndata *)data;
6460
5326de9e
TM		 6461 if (!d_data->lr.roc && nfs4_wait_on_layoutreturn(d_data->inode, task)) {
6462 nfs4_sequence_done(task, &d_data->res.seq_res);
500d701f 6463 return;
5326de9e 6464 }
500d701f 6465
c8bf7073
TM		 6466 lo = d_data->args.lr_args ? d_data->args.lr_args->layout : NULL;
6467 if (lo && !pnfs_layout_is_valid(lo)) {
6468 d_data->args.lr_args = NULL;
6469 d_data->res.lr_res = NULL;
6470 }
6471
42e1cca7 6472 nfs4_setup_sequence(d_data->res.server->nfs_client,
d9afbd1b
TM		 6473 &d_data->args.seq_args,
6474 &d_data->res.seq_res,
6475 task);
938e1010 6476}
938e1010 6477
c8d149f3 6478static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010 6479 .rpc_call_prepare = nfs4_delegreturn_prepare,
fe650407
TM		 6480 .rpc_call_done = nfs4_delegreturn_done,
6481 .rpc_release = nfs4_delegreturn_release,
6482};
6483
a52458b4 6484static int _nfs4_proc_delegreturn(struct inode *inode, const struct cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 6485{
6486 struct nfs4_delegreturndata *data;
fa178f29 6487 struct nfs_server *server = NFS_SERVER(inode);
fe650407 6488 struct rpc_task *task;
5138fde0
TM		 6489 struct rpc_message msg = {
6490 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
6491 .rpc_cred = cred,
6492 };
c970aa85
TM		 6493 struct rpc_task_setup task_setup_data = {
6494 .rpc_client = server->client,
5138fde0 6495 .rpc_message = &msg,
c970aa85 6496 .callback_ops = &nfs4_delegreturn_ops,
f304a809 6497 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
c970aa85 6498 };
e6f81075 6499 int status = 0;
fe650407 6500
8535b2be 6501 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 6502 if (data == NULL)
6503 return -ENOMEM;
fba83f34 6504 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 0);
99ade3c7
AE		 6505
6506 nfs4_state_protect(server->nfs_client,
6507 NFS_SP4_MACH_CRED_CLEANUP,
6508 &task_setup_data.rpc_client, &msg);
6509
fe650407
TM		 6510 data->args.fhandle = &data->fh;
6511 data->args.stateid = &data->stateid;
9e907fec 6512 data->args.bitmask = server->cache_consistency_bitmask;
76bd5c01 6513 nfs4_bitmask_adjust(data->args.bitmask, inode, server, NULL);
fe650407 6514 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 6515 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 6516 data->res.fattr = &data->fattr;
6517 data->res.server = server;
586f1c39 6518 data->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
4d796d75 6519 data->lr.arg.ld_private = &data->lr.ld_private;
5138fde0 6520 nfs_fattr_init(data->res.fattr);
26e976a8 6521 data->timestamp = jiffies;
fe650407 6522 data->rpc_status = 0;
53e6fc86 6523 data->lr.roc = pnfs_roc(inode, &data->lr.arg, &data->lr.res, cred);
ea7c38fe 6524 data->inode = nfs_igrab_and_active(inode);
1c5bd76d 6525 if (data->inode) {
1c5bd76d
TM		 6526 if (data->lr.roc) {
6527 data->args.lr_args = &data->lr.arg;
6528 data->res.lr_res = &data->lr.res;
6529 }
53e6fc86
TM		 6530 } else if (data->lr.roc) {
6531 pnfs_roc_release(&data->lr.arg, &data->lr.res, 0);
6532 data->lr.roc = false;
1c5bd76d 6533 }
fe650407 6534
c970aa85 6535 task_setup_data.callback_data = data;
1174dd1f
TM		 6536 msg.rpc_argp = &data->args;
6537 msg.rpc_resp = &data->res;
c970aa85 6538 task = rpc_run_task(&task_setup_data);
7a1218a2 6539 if (IS_ERR(task))
fe650407 6540 return PTR_ERR(task);
e6f81075
TM		 6541 if (!issync)
6542 goto out;
820bf85c 6543 status = rpc_wait_for_completion_task(task);
e6f81075
TM		 6544 if (status != 0)
6545 goto out;
6546 status = data->rpc_status;
e6f81075 6547out:
e6b3c4db 6548 rpc_put_task(task);
fe650407 6549 return status;
1da177e4
LT		 6550}
6551
a52458b4 6552int nfs4_proc_delegreturn(struct inode *inode, const struct cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 6553{
6554 struct nfs_server *server = NFS_SERVER(inode);
6555 struct nfs4_exception exception = { };
6556 int err;
6557 do {
e6f81075 6558 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
48c9579a 6559 trace_nfs4_delegreturn(inode, stateid, err);
1da177e4
LT		 6560 switch (err) {
6561 case -NFS4ERR_STALE_STATEID:
6562 case -NFS4ERR_EXPIRED:
1da177e4
LT		 6563 case 0:
6564 return 0;
6565 }
6566 err = nfs4_handle_exception(server, err, &exception);
6567 } while (exception.retry);
6568 return err;
6569}
6570
1da177e4
LT		 6571static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6572{
6573 struct inode *inode = state->inode;
6574 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 6575 struct nfs_client *clp = server->nfs_client;
911d1aaf 6576 struct nfs_lockt_args arg = {
1da177e4 6577 .fh = NFS_FH(inode),
911d1aaf 6578 .fl = request,
1da177e4 6579 };
911d1aaf
TM		 6580 struct nfs_lockt_res res = {
6581 .denied = request,
1da177e4
LT		 6582 };
6583 struct rpc_message msg = {
6584 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
d9b67e1e
AS		 6585 .rpc_argp = &arg,
6586 .rpc_resp = &res,
1da177e4
LT		 6587 .rpc_cred = state->owner->so_cred,
6588 };
1da177e4
LT		 6589 struct nfs4_lock_state *lsp;
6590 int status;
6591
911d1aaf 6592 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 6593 status = nfs4_set_lock_state(state, request);
6594 if (status != 0)
6595 goto out;
6596 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 6597 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 6598 arg.lock_owner.s_dev = server->s_dev;
7c513058 6599 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 6600 switch (status) {
6601 case 0:
6602 request->fl_type = F_UNLCK;
6603 break;
6604 case -NFS4ERR_DENIED:
6605 status = 0;
1da177e4 6606 }
70cc6487 6607 request->fl_ops->fl_release_private(request);
a6f951dd 6608 request->fl_ops = NULL;
8d0a8a9d 6609out:
1da177e4
LT		 6610 return status;
6611}
6612
6613static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6614{
0688e64b
TM		 6615 struct nfs4_exception exception = {
6616 .interruptible = true,
6617 };
1da177e4
LT		 6618 int err;
6619
6620 do {
d1b748a5
TM		 6621 err = _nfs4_proc_getlk(state, cmd, request);
6622 trace_nfs4_get_lock(request, state, cmd, err);
6623 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
1da177e4
LT		 6624 &exception);
6625 } while (exception.retry);
6626 return err;
6627}
6628
32c6e7ee
TM		 6629/*
6630 * Update the seqid of a lock stateid after receiving
6631 * NFS4ERR_OLD_STATEID
6632 */
6633static bool nfs4_refresh_lock_old_stateid(nfs4_stateid *dst,
6634 struct nfs4_lock_state *lsp)
6635{
6636 struct nfs4_state *state = lsp->ls_state;
6637 bool ret = false;
6638
6639 spin_lock(&state->state_lock);
6640 if (!nfs4_stateid_match_other(dst, &lsp->ls_stateid))
6641 goto out;
6642 if (!nfs4_stateid_is_newer(&lsp->ls_stateid, dst))
6643 nfs4_stateid_seqid_inc(dst);
6644 else
6645 dst->seqid = lsp->ls_stateid.seqid;
6646 ret = true;
6647out:
6648 spin_unlock(&state->state_lock);
6649 return ret;
6650}
6651
6652static bool nfs4_sync_lock_stateid(nfs4_stateid *dst,
6653 struct nfs4_lock_state *lsp)
6654{
6655 struct nfs4_state *state = lsp->ls_state;
6656 bool ret;
6657
6658 spin_lock(&state->state_lock);
6659 ret = !nfs4_stateid_match_other(dst, &lsp->ls_stateid);
6660 nfs4_stateid_copy(dst, &lsp->ls_stateid);
6661 spin_unlock(&state->state_lock);
6662 return ret;
6663}
6664
faf5f49c 6665struct nfs4_unlockdata {
911d1aaf
TM		 6666 struct nfs_locku_args arg;
6667 struct nfs_locku_res res;
faf5f49c
TM		 6668 struct nfs4_lock_state *lsp;
6669 struct nfs_open_context *ctx;
f30cb757 6670 struct nfs_lock_context *l_ctx;
911d1aaf 6671 struct file_lock fl;
516285eb 6672 struct nfs_server *server;
26e976a8 6673 unsigned long timestamp;
faf5f49c
TM		 6674};
6675
911d1aaf
TM		 6676static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
6677 struct nfs_open_context *ctx,
6678 struct nfs4_lock_state *lsp,
6679 struct nfs_seqid *seqid)
6680{
6681 struct nfs4_unlockdata *p;
32c6e7ee
TM		 6682 struct nfs4_state *state = lsp->ls_state;
6683 struct inode *inode = state->inode;
911d1aaf 6684
8535b2be 6685 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 6686 if (p == NULL)
6687 return NULL;
6688 p->arg.fh = NFS_FH(inode);
6689 p->arg.fl = &p->fl;
6690 p->arg.seqid = seqid;
c1d51931 6691 p->res.seqid = seqid;
911d1aaf 6692 p->lsp = lsp;
911d1aaf
TM		 6693 /* Ensure we don't close file until we're done freeing locks! */
6694 p->ctx = get_nfs_open_context(ctx);
f30cb757 6695 p->l_ctx = nfs_get_lock_context(ctx);
7b587e1a
N		 6696 locks_init_lock(&p->fl);
6697 locks_copy_lock(&p->fl, fl);
911d1aaf 6698 p->server = NFS_SERVER(inode);
32c6e7ee
TM		 6699 spin_lock(&state->state_lock);
6700 nfs4_stateid_copy(&p->arg.stateid, &lsp->ls_stateid);
6701 spin_unlock(&state->state_lock);
911d1aaf
TM		 6702 return p;
6703}
6704
06f814a3 6705static void nfs4_locku_release_calldata(void *data)
faf5f49c 6706{
963d8fe5 6707 struct nfs4_unlockdata *calldata = data;
911d1aaf 6708 nfs_free_seqid(calldata->arg.seqid);
06f814a3 6709 nfs4_put_lock_state(calldata->lsp);
f30cb757 6710 nfs_put_lock_context(calldata->l_ctx);
06f814a3
TM		 6711 put_nfs_open_context(calldata->ctx);
6712 kfree(calldata);
faf5f49c
TM		 6713}
6714
963d8fe5 6715static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 6716{
963d8fe5 6717 struct nfs4_unlockdata *calldata = data;
82571552
TM		 6718 struct nfs4_exception exception = {
6719 .inode = calldata->lsp->ls_state->inode,
6720 .stateid = &calldata->arg.stateid,
6721 };
faf5f49c 6722
14516c3a
TM		 6723 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
6724 return;
faf5f49c
TM		 6725 switch (task->tk_status) {
6726 case 0:
26e976a8 6727 renew_lease(calldata->server, calldata->timestamp);
75575ddf 6728 locks_lock_inode_wait(calldata->lsp->ls_state->inode, &calldata->fl);
c69899a1
TM		 6729 if (nfs4_update_lock_stateid(calldata->lsp,
6730 &calldata->res.stateid))
6731 break;
df561f66 6732 fallthrough;
26d36301
TM		 6733 case -NFS4ERR_ADMIN_REVOKED:
6734 case -NFS4ERR_EXPIRED:
6735 nfs4_free_revoked_stateid(calldata->server,
6736 &calldata->arg.stateid,
6737 task->tk_msg.rpc_cred);
df561f66 6738 fallthrough;
9e33bed5 6739 case -NFS4ERR_BAD_STATEID:
faf5f49c 6740 case -NFS4ERR_STALE_STATEID:
32c6e7ee
TM		 6741 if (nfs4_sync_lock_stateid(&calldata->arg.stateid,
6742 calldata->lsp))
6743 rpc_restart_call_prepare(task);
6744 break;
6745 case -NFS4ERR_OLD_STATEID:
6746 if (nfs4_refresh_lock_old_stateid(&calldata->arg.stateid,
6747 calldata->lsp))
425c1d4e 6748 rpc_restart_call_prepare(task);
faf5f49c
TM		 6749 break;
6750 default:
82571552
TM		 6751 task->tk_status = nfs4_async_handle_exception(task,
6752 calldata->server, task->tk_status,
6753 &exception);
6754 if (exception.retry)
d00c5d43 6755 rpc_restart_call_prepare(task);
faf5f49c 6756 }
2b1bc308 6757 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 6758}
6759
4ce70ada 6760static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 6761{
4ce70ada 6762 struct nfs4_unlockdata *calldata = data;
faf5f49c 6763
f30cb757
BC		 6764 if (test_bit(NFS_CONTEXT_UNLOCK, &calldata->l_ctx->open_context->flags) &&
6765 nfs_async_iocounter_wait(task, calldata->l_ctx))
6766 return;
6767
911d1aaf 6768 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 6769 goto out_wait;
795a88c9 6770 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 6771 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 6772 goto out_no_action;
faf5f49c 6773 }
26e976a8 6774 calldata->timestamp = jiffies;
42e1cca7 6775 if (nfs4_setup_sequence(calldata->server->nfs_client,
a893693c 6776 &calldata->arg.seq_args,
2240a9e2
TM		 6777 &calldata->res.seq_res,
6778 task) != 0)
6779 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 6780 return;
6781out_no_action:
6782 task->tk_action = NULL;
6783out_wait:
6784 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 6785}
6786
963d8fe5 6787static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 6788 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 6789 .rpc_call_done = nfs4_locku_done,
06f814a3 6790 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 6791};
6792
a5d16a4d
TM		 6793static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
6794 struct nfs_open_context *ctx,
6795 struct nfs4_lock_state *lsp,
6796 struct nfs_seqid *seqid)
6797{
6798 struct nfs4_unlockdata *data;
5138fde0
TM		 6799 struct rpc_message msg = {
6800 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
6801 .rpc_cred = ctx->cred,
6802 };
c970aa85
TM		 6803 struct rpc_task_setup task_setup_data = {
6804 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 6805 .rpc_message = &msg,
c970aa85 6806 .callback_ops = &nfs4_locku_ops,
101070ca 6807 .workqueue = nfsiod_workqueue,
c970aa85
TM		 6808 .flags = RPC_TASK_ASYNC,
6809 };
a5d16a4d 6810
fa940720
WAA		 6811 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
6812 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
6813
137d6aca
FF		 6814 /* Ensure this is an unlock - when canceling a lock, the
6815 * canceled lock is passed in, and it won't be an unlock.
6816 */
6817 fl->fl_type = F_UNLCK;
f30cb757
BC		 6818 if (fl->fl_flags & FL_CLOSE)
6819 set_bit(NFS_CONTEXT_UNLOCK, &ctx->flags);
137d6aca 6820
a5d16a4d
TM		 6821 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
6822 if (data == NULL) {
6823 nfs_free_seqid(seqid);
6824 return ERR_PTR(-ENOMEM);
6825 }
6826
fba83f34 6827 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1, 0);
1174dd1f
TM		 6828 msg.rpc_argp = &data->arg;
6829 msg.rpc_resp = &data->res;
c970aa85
TM		 6830 task_setup_data.callback_data = data;
6831 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 6832}
6833
faf5f49c
TM		 6834static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
6835{
65b62a29
TM		 6836 struct inode *inode = state->inode;
6837 struct nfs4_state_owner *sp = state->owner;
6838 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 6839 struct nfs_seqid *seqid;
1da177e4 6840 struct nfs4_lock_state *lsp;
06f814a3 6841 struct rpc_task *task;
b4019c0e 6842 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
06f814a3 6843 int status = 0;
536ff0f8 6844 unsigned char fl_flags = request->fl_flags;
faf5f49c 6845
8d0a8a9d 6846 status = nfs4_set_lock_state(state, request);
9b073574
TM		 6847 /* Unlock _before_ we do the RPC call */
6848 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 6849 /* Exclude nfs_delegation_claim_locks() */
6850 mutex_lock(&sp->so_delegreturn_mutex);
6851 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57 6852 down_read(&nfsi->rwsem);
75575ddf 6853 if (locks_lock_inode_wait(inode, request) == -ENOENT) {
19e03c57 6854 up_read(&nfsi->rwsem);
65b62a29 6855 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 6856 goto out;
19e03c57
TM		 6857 }
6858 up_read(&nfsi->rwsem);
65b62a29 6859 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 6860 if (status != 0)
9b073574
TM		 6861 goto out;
6862 /* Is this a delegated lock? */
8d0a8a9d 6863 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 6864 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
6865 goto out;
b4019c0e
TM		 6866 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid;
6867 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 6868 status = -ENOMEM;
badc76dd 6869 if (IS_ERR(seqid))
9b073574 6870 goto out;
cd3758e3 6871 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 6872 status = PTR_ERR(task);
6873 if (IS_ERR(task))
9b073574 6874 goto out;
820bf85c 6875 status = rpc_wait_for_completion_task(task);
e6b3c4db 6876 rpc_put_task(task);
9b073574 6877out:
536ff0f8 6878 request->fl_flags = fl_flags;
d1b748a5 6879 trace_nfs4_unlock(request, state, F_SETLK, status);
1da177e4
LT		 6880 return status;
6881}
6882
a5d16a4d
TM		 6883struct nfs4_lockdata {
6884 struct nfs_lock_args arg;
6885 struct nfs_lock_res res;
6886 struct nfs4_lock_state *lsp;
6887 struct nfs_open_context *ctx;
6888 struct file_lock fl;
26e976a8 6889 unsigned long timestamp;
a5d16a4d
TM		 6890 int rpc_status;
6891 int cancelled;
66179efe 6892 struct nfs_server *server;
a5d16a4d
TM		 6893};
6894
6895static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 6896 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
6897 gfp_t gfp_mask)
1da177e4 6898{
a5d16a4d
TM		 6899 struct nfs4_lockdata *p;
6900 struct inode *inode = lsp->ls_state->inode;
1da177e4 6901 struct nfs_server *server = NFS_SERVER(inode);
b4019c0e 6902 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
a5d16a4d 6903
8535b2be 6904 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 6905 if (p == NULL)
6906 return NULL;
6907
6908 p->arg.fh = NFS_FH(inode);
6909 p->arg.fl = &p->fl;
8535b2be 6910 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
badc76dd 6911 if (IS_ERR(p->arg.open_seqid))
2f74c0a0 6912 goto out_free;
b4019c0e
TM		 6913 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
6914 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask);
badc76dd 6915 if (IS_ERR(p->arg.lock_seqid))
2f74c0a0 6916 goto out_free_seqid;
7539bbab 6917 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 6918 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 6919 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 6920 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 6921 p->lsp = lsp;
66179efe 6922 p->server = server;
a5d16a4d 6923 p->ctx = get_nfs_open_context(ctx);
7b587e1a
N		 6924 locks_init_lock(&p->fl);
6925 locks_copy_lock(&p->fl, fl);
a5d16a4d 6926 return p;
2f74c0a0
TM		 6927out_free_seqid:
6928 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 6929out_free:
6930 kfree(p);
6931 return NULL;
6932}
6933
6934static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
6935{
6936 struct nfs4_lockdata *data = calldata;
6937 struct nfs4_state *state = data->lsp->ls_state;
06735b34 6938
3110ff80 6939 dprintk("%s: begin!\n", __func__);
2f74c0a0 6940 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 6941 goto out_wait;
a5d16a4d 6942 /* Do we need to do an open_to_lock_owner? */
6b447539 6943 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) {
8fe72bac 6944 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 6945 goto out_release_lock_seqid;
8fe72bac 6946 }
425c1d4e
TM		 6947 nfs4_stateid_copy(&data->arg.open_stateid,
6948 &state->open_stateid);
a5d16a4d 6949 data->arg.new_lock_owner = 1;
c1d51931 6950 data->res.open_seqid = data->arg.open_seqid;
425c1d4e 6951 } else {
2f74c0a0 6952 data->arg.new_lock_owner = 0;
425c1d4e
TM		 6953 nfs4_stateid_copy(&data->arg.lock_stateid,
6954 &data->lsp->ls_stateid);
6955 }
5d422301
TM		 6956 if (!nfs4_valid_open_stateid(state)) {
6957 data->rpc_status = -EBADF;
6958 task->tk_action = NULL;
6959 goto out_release_open_seqid;
6960 }
26e976a8 6961 data->timestamp = jiffies;
42e1cca7 6962 if (nfs4_setup_sequence(data->server->nfs_client,
035168ab 6963 &data->arg.seq_args,
2240a9e2 6964 &data->res.seq_res,
d9afbd1b 6965 task) == 0)
66179efe 6966 return;
5d422301 6967out_release_open_seqid:
2240a9e2
TM		 6968 nfs_release_seqid(data->arg.open_seqid);
6969out_release_lock_seqid:
6970 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 6971out_wait:
6972 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 6973 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 6974}
6975
a5d16a4d
TM		 6976static void nfs4_lock_done(struct rpc_task *task, void *calldata)
6977{
6978 struct nfs4_lockdata *data = calldata;
39071e6f 6979 struct nfs4_lock_state *lsp = data->lsp;
a5d16a4d 6980
3110ff80 6981 dprintk("%s: begin!\n", __func__);
a5d16a4d 6982
14516c3a
TM		 6983 if (!nfs4_sequence_done(task, &data->res.seq_res))
6984 return;
66179efe 6985
a5d16a4d 6986 data->rpc_status = task->tk_status;
425c1d4e
TM		 6987 switch (task->tk_status) {
6988 case 0:
2b0143b5 6989 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)),
39071e6f 6990 data->timestamp);
a3cf9bca 6991 if (data->arg.new_lock && !data->cancelled) {
c69899a1 6992 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS);
a3cf9bca 6993 if (locks_lock_inode_wait(lsp->ls_state->inode, &data->fl) < 0)
6ea76bf5 6994 goto out_restart;
c69899a1 6995 }
39071e6f
TM		 6996 if (data->arg.new_lock_owner != 0) {
6997 nfs_confirm_seqid(&lsp->ls_seqid, 0);
6998 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid);
6999 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
6ea76bf5
TM		 7000 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid))
7001 goto out_restart;
425c1d4e
TM		 7002 break;
7003 case -NFS4ERR_BAD_STATEID:
7004 case -NFS4ERR_OLD_STATEID:
7005 case -NFS4ERR_STALE_STATEID:
7006 case -NFS4ERR_EXPIRED:
7007 if (data->arg.new_lock_owner != 0) {
6ea76bf5 7008 if (!nfs4_stateid_match(&data->arg.open_stateid,
425c1d4e 7009 &lsp->ls_state->open_stateid))
6ea76bf5
TM		 7010 goto out_restart;
7011 } else if (!nfs4_stateid_match(&data->arg.lock_stateid,
425c1d4e 7012 &lsp->ls_stateid))
6ea76bf5 7013 goto out_restart;
a5d16a4d 7014 }
a3cf9bca 7015out_done:
3110ff80 7016 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
6ea76bf5
TM		 7017 return;
7018out_restart:
7019 if (!data->cancelled)
7020 rpc_restart_call_prepare(task);
7021 goto out_done;
a5d16a4d
TM		 7022}
7023
7024static void nfs4_lock_release(void *calldata)
7025{
7026 struct nfs4_lockdata *data = calldata;
7027
3110ff80 7028 dprintk("%s: begin!\n", __func__);
2f74c0a0 7029 nfs_free_seqid(data->arg.open_seqid);
6ea76bf5 7030 if (data->cancelled && data->rpc_status == 0) {
a5d16a4d
TM		 7031 struct rpc_task *task;
7032 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
7033 data->arg.lock_seqid);
7034 if (!IS_ERR(task))
bf294b41 7035 rpc_put_task_async(task);
3110ff80 7036 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 7037 } else
7038 nfs_free_seqid(data->arg.lock_seqid);
7039 nfs4_put_lock_state(data->lsp);
7040 put_nfs_open_context(data->ctx);
7041 kfree(data);
3110ff80 7042 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 7043}
7044
7045static const struct rpc_call_ops nfs4_lock_ops = {
7046 .rpc_call_prepare = nfs4_lock_prepare,
7047 .rpc_call_done = nfs4_lock_done,
7048 .rpc_release = nfs4_lock_release,
7049};
7050
2bee72a6
TM		 7051static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
7052{
2bee72a6
TM		 7053 switch (error) {
7054 case -NFS4ERR_ADMIN_REVOKED:
d7f3e4bf 7055 case -NFS4ERR_EXPIRED:
2bee72a6 7056 case -NFS4ERR_BAD_STATEID:
ecac799a 7057 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 7058 if (new_lock_owner != 0 ||
795a88c9 7059 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 7060 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 7061 break;
7062 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 7063 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a 7064 nfs4_schedule_lease_recovery(server->nfs_client);
8b98a532 7065 }
2bee72a6
TM		 7066}
7067
afe6c27c 7068static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 7069{
7070 struct nfs4_lockdata *data;
7071 struct rpc_task *task;
5138fde0
TM		 7072 struct rpc_message msg = {
7073 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
7074 .rpc_cred = state->owner->so_cred,
7075 };
c970aa85
TM		 7076 struct rpc_task_setup task_setup_data = {
7077 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 7078 .rpc_message = &msg,
c970aa85 7079 .callback_ops = &nfs4_lock_ops,
101070ca 7080 .workqueue = nfsiod_workqueue,
61296507 7081 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF,
c970aa85 7082 };
a5d16a4d
TM		 7083 int ret;
7084
3110ff80 7085 dprintk("%s: begin!\n", __func__);
cd3758e3 7086 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 7087 fl->fl_u.nfs4_fl.owner,
7088 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 7089 if (data == NULL)
7090 return -ENOMEM;
7091 if (IS_SETLKW(cmd))
7092 data->arg.block = 1;
fba83f34
AS		 7093 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1,
7094 recovery_type > NFS_LOCK_NEW);
1174dd1f
TM		 7095 msg.rpc_argp = &data->arg;
7096 msg.rpc_resp = &data->res;
c970aa85 7097 task_setup_data.callback_data = data;
8fe72bac
TM		 7098 if (recovery_type > NFS_LOCK_NEW) {
7099 if (recovery_type == NFS_LOCK_RECLAIM)
7100 data->arg.reclaim = NFS_LOCK_RECLAIM;
c69899a1
TM		 7101 } else
7102 data->arg.new_lock = 1;
c970aa85 7103 task = rpc_run_task(&task_setup_data);
7a1218a2 7104 if (IS_ERR(task))
a5d16a4d 7105 return PTR_ERR(task);
820bf85c 7106 ret = rpc_wait_for_completion_task(task);
a5d16a4d
TM		 7107 if (ret == 0) {
7108 ret = data->rpc_status;
2bee72a6
TM		 7109 if (ret)
7110 nfs4_handle_setlk_error(data->server, data->lsp,
7111 data->arg.new_lock_owner, ret);
a5d16a4d 7112 } else
a7a3b1e9 7113 data->cancelled = true;
e6b3c4db 7114 rpc_put_task(task);
3110ff80 7115 dprintk("%s: done, ret = %d!\n", __func__, ret);
48c9579a 7116 trace_nfs4_set_lock(fl, state, &data->res.stateid, cmd, ret);
a5d16a4d 7117 return ret;
1da177e4
LT		 7118}
7119
7120static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
7121{
202b50dc 7122 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 7123 struct nfs4_exception exception = {
7124 .inode = state->inode,
7125 };
202b50dc
TM		 7126 int err;
7127
7128 do {
42a2d13e
TM		 7129 /* Cache the lock if possible... */
7130 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
7131 return 0;
afe6c27c 7132 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 7133 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 7134 break;
7135 nfs4_handle_exception(server, err, &exception);
7136 } while (exception.retry);
7137 return err;
1da177e4
LT		 7138}
7139
7140static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
7141{
202b50dc 7142 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 7143 struct nfs4_exception exception = {
7144 .inode = state->inode,
7145 };
202b50dc
TM		 7146 int err;
7147
6bfc93ef
TM		 7148 err = nfs4_set_lock_state(state, request);
7149 if (err != 0)
7150 return err;
f6de7a39 7151 if (!recover_lost_locks) {
ef1820f9
N		 7152 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
7153 return 0;
7154 }
202b50dc 7155 do {
42a2d13e
TM		 7156 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
7157 return 0;
afe6c27c 7158 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 7159 switch (err) {
7160 default:
7161 goto out;
7162 case -NFS4ERR_GRACE:
7163 case -NFS4ERR_DELAY:
7164 nfs4_handle_exception(server, err, &exception);
7165 err = 0;
7166 }
202b50dc 7167 } while (exception.retry);
a9ed2e25 7168out:
202b50dc 7169 return err;
1da177e4
LT		 7170}
7171
f062eb6c 7172#if defined(CONFIG_NFS_V4_1)
b01dd1d8
BS		 7173static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
7174{
c5896fc8
TM		 7175 struct nfs4_lock_state *lsp;
7176 int status;
b01dd1d8 7177
c5896fc8
TM		 7178 status = nfs4_set_lock_state(state, request);
7179 if (status != 0)
7180 return status;
7181 lsp = request->fl_u.nfs4_fl.owner;
7182 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) ||
7183 test_bit(NFS_LOCK_LOST, &lsp->ls_flags))
7184 return 0;
81b68de4 7185 return nfs4_lock_expired(state, request);
f062eb6c
BS		 7186}
7187#endif
7188
1da177e4
LT		 7189static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
7190{
19e03c57 7191 struct nfs_inode *nfsi = NFS_I(state->inode);
11476e9d 7192 struct nfs4_state_owner *sp = state->owner;
01c3b861 7193 unsigned char fl_flags = request->fl_flags;
1ea67dbd 7194 int status;
1da177e4 7195
01c3b861 7196 request->fl_flags |= FL_ACCESS;
75575ddf 7197 status = locks_lock_inode_wait(state->inode, request);
01c3b861
TM		 7198 if (status < 0)
7199 goto out;
11476e9d 7200 mutex_lock(&sp->so_delegreturn_mutex);
19e03c57 7201 down_read(&nfsi->rwsem);
01c3b861 7202 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 7203 /* Yes: cache locks! */
01c3b861 7204 /* ...but avoid races with delegation recall... */
19e03c57 7205 request->fl_flags = fl_flags & ~FL_SLEEP;
75575ddf 7206 status = locks_lock_inode_wait(state->inode, request);
c69899a1 7207 up_read(&nfsi->rwsem);
11476e9d 7208 mutex_unlock(&sp->so_delegreturn_mutex);
9a99af49 7209 goto out;
9a99af49 7210 }
19e03c57 7211 up_read(&nfsi->rwsem);
11476e9d 7212 mutex_unlock(&sp->so_delegreturn_mutex);
c69899a1 7213 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
01c3b861
TM		 7214out:
7215 request->fl_flags = fl_flags;
1da177e4
LT		 7216 return status;
7217}
7218
7219static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
7220{
a1d0b5ee
TM		 7221 struct nfs4_exception exception = {
7222 .state = state,
05ffe24f 7223 .inode = state->inode,
0688e64b 7224 .interruptible = true,
a1d0b5ee 7225 };
1da177e4
LT		 7226 int err;
7227
7228 do {
965b5d67
TM		 7229 err = _nfs4_proc_setlk(state, cmd, request);
7230 if (err == -NFS4ERR_DENIED)
7231 err = -EAGAIN;
1da177e4 7232 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 7233 err, &exception);
1da177e4
LT		 7234 } while (exception.retry);
7235 return err;
7236}
7237
d2f3a7f9
JL		 7238#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
7239#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
7240
7241static int
a1d617d8
JL		 7242nfs4_retry_setlk_simple(struct nfs4_state *state, int cmd,
7243 struct file_lock *request)
d2f3a7f9
JL		 7244{
7245 int status = -ERESTARTSYS;
7246 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
7247
7248 while(!signalled()) {
7249 status = nfs4_proc_setlk(state, cmd, request);
7250 if ((status != -EAGAIN) || IS_SETLK(cmd))
7251 break;
7252 freezable_schedule_timeout_interruptible(timeout);
7253 timeout *= 2;
7254 timeout = min_t(unsigned long, NFS4_LOCK_MAXTIMEOUT, timeout);
7255 status = -ERESTARTSYS;
7256 }
7257 return status;
7258}
7259
a1d617d8
JL		 7260#ifdef CONFIG_NFS_V4_1
7261struct nfs4_lock_waiter {
7262 struct task_struct *task;
7263 struct inode *inode;
7264 struct nfs_lowner *owner;
a1d617d8
JL		 7265};
7266
7267static int
ac6424b9 7268nfs4_wake_lock_waiter(wait_queue_entry_t *wait, unsigned int mode, int flags, void *key)
a1d617d8
JL		 7269{
7270 int ret;
a1d617d8 7271 struct nfs4_lock_waiter *waiter = wait->private;
a1d617d8 7272
57174593
JL		 7273 /* NULL key means to wake up everyone */
7274 if (key) {
7275 struct cb_notify_lock_args *cbnl = key;
7276 struct nfs_lowner *lowner = &cbnl->cbnl_owner,
7277 *wowner = waiter->owner;
a1d617d8 7278
57174593
JL		 7279 /* Only wake if the callback was for the same owner. */
7280 if (lowner->id != wowner->id || lowner->s_dev != wowner->s_dev)
7281 return 0;
a1d617d8 7282
57174593
JL		 7283 /* Make sure it's for the right inode */
7284 if (nfs_compare_fh(NFS_FH(waiter->inode), &cbnl->cbnl_fh))
7285 return 0;
57174593 7286 }
a1d617d8
JL		 7287
7288 /* override "private" so we can use default_wake_function */
7289 wait->private = waiter->task;
52b042ab
YW		 7290 ret = woken_wake_function(wait, mode, flags, key);
7291 if (ret)
7292 list_del_init(&wait->entry);
a1d617d8
JL		 7293 wait->private = waiter;
7294 return ret;
7295}
7296
7297static int
7298nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
7299{
7300 int status = -ERESTARTSYS;
a1d617d8
JL		 7301 struct nfs4_lock_state *lsp = request->fl_u.nfs4_fl.owner;
7302 struct nfs_server *server = NFS_SERVER(state->inode);
7303 struct nfs_client *clp = server->nfs_client;
7304 wait_queue_head_t *q = &clp->cl_lock_waitq;
7305 struct nfs_lowner owner = { .clientid = clp->cl_clientid,
7306 .id = lsp->ls_seqid.owner_id,
7307 .s_dev = server->s_dev };
7308 struct nfs4_lock_waiter waiter = { .task = current,
7309 .inode = state->inode,
52b042ab 7310 .owner = &owner};
ac6424b9 7311 wait_queue_entry_t wait;
a1d617d8
JL		 7312
7313 /* Don't bother with waitqueue if we don't expect a callback */
7314 if (!test_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags))
7315 return nfs4_retry_setlk_simple(state, cmd, request);
7316
7317 init_wait(&wait);
7318 wait.private = &waiter;
7319 wait.func = nfs4_wake_lock_waiter;
a1d617d8
JL		 7320
7321 while(!signalled()) {
ba851a39 7322 add_wait_queue(q, &wait);
a1d617d8 7323 status = nfs4_proc_setlk(state, cmd, request);
ba851a39
YW		 7324 if ((status != -EAGAIN) || IS_SETLK(cmd)) {
7325 finish_wait(q, &wait);
a1d617d8 7326 break;
ba851a39 7327 }
a1d617d8
JL		 7328
7329 status = -ERESTARTSYS;
52b042ab
YW		 7330 freezer_do_not_count();
7331 wait_woken(&wait, TASK_INTERRUPTIBLE, NFS4_LOCK_MAXTIMEOUT);
7332 freezer_count();
ba851a39 7333 finish_wait(q, &wait);
a1d617d8
JL		 7334 }
7335
a1d617d8
JL		 7336 return status;
7337}
7338#else /* !CONFIG_NFS_V4_1 */
7339static inline int
7340nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
7341{
7342 return nfs4_retry_setlk_simple(state, cmd, request);
7343}
7344#endif
7345
1da177e4
LT		 7346static int
7347nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
7348{
7349 struct nfs_open_context *ctx;
7350 struct nfs4_state *state;
1da177e4
LT		 7351 int status;
7352
7353 /* verify open state */
cd3758e3 7354 ctx = nfs_file_open_context(filp);
1da177e4
LT		 7355 state = ctx->state;
7356
d953126a
TM		 7357 if (IS_GETLK(cmd)) {
7358 if (state != NULL)
7359 return nfs4_proc_getlk(state, F_GETLK, request);
7360 return 0;
7361 }
1da177e4
LT		 7362
7363 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
7364 return -EINVAL;
7365
d953126a
TM		 7366 if (request->fl_type == F_UNLCK) {
7367 if (state != NULL)
7368 return nfs4_proc_unlck(state, cmd, request);
7369 return 0;
7370 }
1da177e4 7371
d953126a
TM		 7372 if (state == NULL)
7373 return -ENOLCK;
1ea67dbd
JL		 7374
7375 if ((request->fl_flags & FL_POSIX) &&
7376 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
7377 return -ENOLCK;
7378
fcfa4470
BC		 7379 /*
7380 * Don't rely on the VFS having checked the file open mode,
7381 * since it won't do this for flock() locks.
7382 */
7383 switch (request->fl_type) {
7384 case F_RDLCK:
7385 if (!(filp->f_mode & FMODE_READ))
7386 return -EBADF;
7387 break;
7388 case F_WRLCK:
7389 if (!(filp->f_mode & FMODE_WRITE))
7390 return -EBADF;
7391 }
7392
1ea67dbd
JL		 7393 status = nfs4_set_lock_state(state, request);
7394 if (status != 0)
7395 return status;
7396
d2f3a7f9 7397 return nfs4_retry_setlk(state, cmd, request);
1da177e4
LT		 7398}
7399
db4f2e63 7400int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 7401{
7402 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 7403 int err;
7404
7405 err = nfs4_set_lock_state(state, fl);
7406 if (err != 0)
db4f2e63 7407 return err;
3d7a9520
OK		 7408 do {
7409 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
7410 if (err != -NFS4ERR_DELAY)
7411 break;
7412 ssleep(1);
7413 } while (err == -NFS4ERR_DELAY);
dce2630c 7414 return nfs4_handle_delegation_recall_error(server, state, stateid, fl, err);
888e694c 7415}
6b3b5496 7416
cf470c3e
TM		 7417struct nfs_release_lockowner_data {
7418 struct nfs4_lock_state *lsp;
5ae67c4f 7419 struct nfs_server *server;
cf470c3e 7420 struct nfs_release_lockowner_args args;
b7e63a10 7421 struct nfs_release_lockowner_res res;
60ea6812 7422 unsigned long timestamp;
cf470c3e
TM		 7423};
7424
fbd4bfd1
CL		 7425static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
7426{
7427 struct nfs_release_lockowner_data *data = calldata;
5b53dc88 7428 struct nfs_server *server = data->server;
7981c8a6
AS		 7429 nfs4_setup_sequence(server->nfs_client, &data->args.seq_args,
7430 &data->res.seq_res, task);
5b53dc88 7431 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
60ea6812 7432 data->timestamp = jiffies;
fbd4bfd1
CL		 7433}
7434
7435static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
7436{
7437 struct nfs_release_lockowner_data *data = calldata;
60ea6812
CL		 7438 struct nfs_server *server = data->server;
7439
b7e63a10 7440 nfs40_sequence_done(task, &data->res.seq_res);
60ea6812
CL		 7441
7442 switch (task->tk_status) {
7443 case 0:
7444 renew_lease(server, data->timestamp);
7445 break;
7446 case -NFS4ERR_STALE_CLIENTID:
7447 case -NFS4ERR_EXPIRED:
5b53dc88
KM		 7448 nfs4_schedule_lease_recovery(server->nfs_client);
7449 break;
60ea6812
CL		 7450 case -NFS4ERR_LEASE_MOVED:
7451 case -NFS4ERR_DELAY:
8478eaa1
N		 7452 if (nfs4_async_handle_error(task, server,
7453 NULL, NULL) == -EAGAIN)
60ea6812
CL		 7454 rpc_restart_call_prepare(task);
7455 }
fbd4bfd1
CL		 7456}
7457
d3c7b7cc
TM		 7458static void nfs4_release_lockowner_release(void *calldata)
7459{
cf470c3e 7460 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 7461 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 7462 kfree(calldata);
7463}
7464
17280175 7465static const struct rpc_call_ops nfs4_release_lockowner_ops = {
fbd4bfd1
CL		 7466 .rpc_call_prepare = nfs4_release_lockowner_prepare,
7467 .rpc_call_done = nfs4_release_lockowner_done,
d3c7b7cc
TM		 7468 .rpc_release = nfs4_release_lockowner_release,
7469};
7470
f1cdae87
JL		 7471static void
7472nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 7473{
cf470c3e 7474 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 7475 struct rpc_message msg = {
7476 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
7477 };
7478
7479 if (server->nfs_client->cl_mvops->minor_version != 0)
f1cdae87 7480 return;
fbd4bfd1 7481
cf470c3e
TM		 7482 data = kmalloc(sizeof(*data), GFP_NOFS);
7483 if (!data)
f1cdae87 7484 return;
cf470c3e 7485 data->lsp = lsp;
5ae67c4f 7486 data->server = server;
cf470c3e
TM		 7487 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
7488 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
7489 data->args.lock_owner.s_dev = server->s_dev;
fbd4bfd1 7490
cf470c3e 7491 msg.rpc_argp = &data->args;
b7e63a10 7492 msg.rpc_resp = &data->res;
fba83f34 7493 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0, 0);
cf470c3e 7494 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
d3c7b7cc
TM		 7495}
7496
aa1870af
BF		 7497#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
7498
d9a82a04 7499static int nfs4_xattr_set_nfs4_acl(const struct xattr_handler *handler,
59301226
AV		 7500 struct dentry *unused, struct inode *inode,
7501 const char *key, const void *buf,
7502 size_t buflen, int flags)
6b3b5496 7503{
59301226 7504 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 7505}
7506
d9a82a04 7507static int nfs4_xattr_get_nfs4_acl(const struct xattr_handler *handler,
b296821a
AV		 7508 struct dentry *unused, struct inode *inode,
7509 const char *key, void *buf, size_t buflen)
6b3b5496 7510{
b296821a 7511 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 7512}
7513
764a5c6b 7514static bool nfs4_xattr_list_nfs4_acl(struct dentry *dentry)
6b3b5496 7515{
764a5c6b 7516 return nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry)));
6b3b5496
BF		 7517}
7518
c9bccef6 7519#ifdef CONFIG_NFS_V4_SECURITY_LABEL
c9bccef6 7520
d9a82a04 7521static int nfs4_xattr_set_nfs4_label(const struct xattr_handler *handler,
59301226
AV		 7522 struct dentry *unused, struct inode *inode,
7523 const char *key, const void *buf,
7524 size_t buflen, int flags)
c9bccef6
DQ		 7525{
7526 if (security_ismaclabel(key))
59301226 7527 return nfs4_set_security_label(inode, buf, buflen);
c9bccef6
DQ		 7528
7529 return -EOPNOTSUPP;
7530}
7531
d9a82a04 7532static int nfs4_xattr_get_nfs4_label(const struct xattr_handler *handler,
b296821a
AV		 7533 struct dentry *unused, struct inode *inode,
7534 const char *key, void *buf, size_t buflen)
c9bccef6
DQ		 7535{
7536 if (security_ismaclabel(key))
b296821a 7537 return nfs4_get_security_label(inode, buf, buflen);
c9bccef6
DQ		 7538 return -EOPNOTSUPP;
7539}
7540
c4803c49
AG		 7541static ssize_t
7542nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
c9bccef6 7543{
c4803c49 7544 int len = 0;
c9bccef6 7545
c4803c49
AG		 7546 if (nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) {
7547 len = security_inode_listsecurity(inode, list, list_len);
82c596eb 7548 if (len >= 0 && list_len && len > list_len)
c4803c49 7549 return -ERANGE;
c9bccef6
DQ		 7550 }
7551 return len;
7552}
7553
7554static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
7555 .prefix = XATTR_SECURITY_PREFIX,
c9bccef6
DQ		 7556 .get = nfs4_xattr_get_nfs4_label,
7557 .set = nfs4_xattr_set_nfs4_label,
7558};
c9bccef6 7559
c4803c49
AG		 7560#else
7561
7562static ssize_t
7563nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
7564{
7565 return 0;
7566}
7567
7568#endif
c9bccef6 7569
012a211a
FL		 7570#ifdef CONFIG_NFS_V4_2
7571static int nfs4_xattr_set_nfs4_user(const struct xattr_handler *handler,
7572 struct dentry *unused, struct inode *inode,
7573 const char *key, const void *buf,
7574 size_t buflen, int flags)
7575{
7576 struct nfs_access_entry cache;
95ad37f9 7577 int ret;
012a211a
FL		 7578
7579 if (!nfs_server_capable(inode, NFS_CAP_XATTR))
7580 return -EOPNOTSUPP;
7581
7582 /*
7583 * There is no mapping from the MAY_* flags to the NFS_ACCESS_XA*
7584 * flags right now. Handling of xattr operations use the normal
7585 * file read/write permissions.
7586 *
7587 * Just in case the server has other ideas (which RFC 8276 allows),
7588 * do a cached access check for the XA* flags to possibly avoid
7589 * doing an RPC and getting EACCES back.
7590 */
7591 if (!nfs_access_get_cached(inode, current_cred(), &cache, true)) {
7592 if (!(cache.mask & NFS_ACCESS_XAWRITE))
7593 return -EACCES;
7594 }
7595
95ad37f9
FL		 7596 if (buf == NULL) {
7597 ret = nfs42_proc_removexattr(inode, key);
7598 if (!ret)
7599 nfs4_xattr_cache_remove(inode, key);
7600 } else {
7601 ret = nfs42_proc_setxattr(inode, key, buf, buflen, flags);
7602 if (!ret)
7603 nfs4_xattr_cache_add(inode, key, buf, NULL, buflen);
7604 }
7605
7606 return ret;
012a211a
FL		 7607}
7608
7609static int nfs4_xattr_get_nfs4_user(const struct xattr_handler *handler,
7610 struct dentry *unused, struct inode *inode,
7611 const char *key, void *buf, size_t buflen)
7612{
7613 struct nfs_access_entry cache;
95ad37f9 7614 ssize_t ret;
012a211a
FL		 7615
7616 if (!nfs_server_capable(inode, NFS_CAP_XATTR))
7617 return -EOPNOTSUPP;
7618
7619 if (!nfs_access_get_cached(inode, current_cred(), &cache, true)) {
7620 if (!(cache.mask & NFS_ACCESS_XAREAD))
7621 return -EACCES;
7622 }
7623
95ad37f9
FL		 7624 ret = nfs_revalidate_inode(NFS_SERVER(inode), inode);
7625 if (ret)
7626 return ret;
7627
7628 ret = nfs4_xattr_cache_get(inode, key, buf, buflen);
7629 if (ret >= 0 || (ret < 0 && ret != -ENOENT))
7630 return ret;
7631
7632 ret = nfs42_proc_getxattr(inode, key, buf, buflen);
7633
7634 return ret;
012a211a
FL		 7635}
7636
7637static ssize_t
7638nfs4_listxattr_nfs4_user(struct inode *inode, char *list, size_t list_len)
7639{
7640 u64 cookie;
7641 bool eof;
95ad37f9 7642 ssize_t ret, size;
012a211a
FL		 7643 char *buf;
7644 size_t buflen;
7645 struct nfs_access_entry cache;
7646
7647 if (!nfs_server_capable(inode, NFS_CAP_XATTR))
7648 return 0;
7649
7650 if (!nfs_access_get_cached(inode, current_cred(), &cache, true)) {
7651 if (!(cache.mask & NFS_ACCESS_XALIST))
7652 return 0;
7653 }
7654
95ad37f9
FL		 7655 ret = nfs_revalidate_inode(NFS_SERVER(inode), inode);
7656 if (ret)
7657 return ret;
7658
7659 ret = nfs4_xattr_cache_list(inode, list, list_len);
7660 if (ret >= 0 || (ret < 0 && ret != -ENOENT))
7661 return ret;
7662
012a211a
FL		 7663 cookie = 0;
7664 eof = false;
7665 buflen = list_len ? list_len : XATTR_LIST_MAX;
7666 buf = list_len ? list : NULL;
7667 size = 0;
7668
7669 while (!eof) {
7670 ret = nfs42_proc_listxattrs(inode, buf, buflen,
7671 &cookie, &eof);
7672 if (ret < 0)
7673 return ret;
7674
7675 if (list_len) {
7676 buf += ret;
7677 buflen -= ret;
7678 }
7679 size += ret;
7680 }
7681
95ad37f9
FL		 7682 if (list_len)
7683 nfs4_xattr_cache_set_list(inode, list, size);
7684
012a211a
FL		 7685 return size;
7686}
7687
7688#else
7689
7690static ssize_t
7691nfs4_listxattr_nfs4_user(struct inode *inode, char *list, size_t list_len)
7692{
7693 return 0;
7694}
7695#endif /* CONFIG_NFS_V4_2 */
7696
533eb461
AA		 7697/*
7698 * nfs_fhget will use either the mounted_on_fileid or the fileid
7699 */
69aaaae1
TM		 7700static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
7701{
533eb461
AA		 7702 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
7703 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
7704 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 7705 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 7706 return;
7707
7708 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 7709 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 7710 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
7711 fattr->nlink = 2;
7712}
7713
f05d147f
BS		 7714static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
7715 const struct qstr *name,
7716 struct nfs4_fs_locations *fs_locations,
7717 struct page *page)
683b57b4
TM		 7718{
7719 struct nfs_server *server = NFS_SERVER(dir);
c05cefcc 7720 u32 bitmask[3];
683b57b4
TM		 7721 struct nfs4_fs_locations_arg args = {
7722 .dir_fh = NFS_FH(dir),
c228fd3a 7723 .name = name,
683b57b4
TM		 7724 .page = page,
7725 .bitmask = bitmask,
7726 };
22958463
BH		 7727 struct nfs4_fs_locations_res res = {
7728 .fs_locations = fs_locations,
7729 };
683b57b4
TM		 7730 struct rpc_message msg = {
7731 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
7732 .rpc_argp = &args,
22958463 7733 .rpc_resp = &res,
683b57b4
TM		 7734 };
7735 int status;
7736
3110ff80 7737 dprintk("%s: start\n", __func__);
533eb461 7738
c05cefcc
CL		 7739 bitmask[0] = nfs4_fattr_bitmap[0] | FATTR4_WORD0_FS_LOCATIONS;
7740 bitmask[1] = nfs4_fattr_bitmap[1];
7741
533eb461
AA		 7742 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
7743 * is not supported */
7744 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
c05cefcc 7745 bitmask[0] &= ~FATTR4_WORD0_FILEID;
533eb461 7746 else
c05cefcc 7747 bitmask[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
533eb461 7748
c228fd3a 7749 nfs_fattr_init(&fs_locations->fattr);
683b57b4 7750 fs_locations->server = server;
830b8e33 7751 fs_locations->nlocations = 0;
f05d147f 7752 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 7753 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 7754 return status;
7755}
7756
f05d147f
BS		 7757int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
7758 const struct qstr *name,
7759 struct nfs4_fs_locations *fs_locations,
7760 struct page *page)
db0a9593 7761{
0688e64b
TM		 7762 struct nfs4_exception exception = {
7763 .interruptible = true,
7764 };
db0a9593
BS		 7765 int err;
7766 do {
078ea3df
TM		 7767 err = _nfs4_proc_fs_locations(client, dir, name,
7768 fs_locations, page);
7769 trace_nfs4_get_fs_locations(dir, name, err);
7770 err = nfs4_handle_exception(NFS_SERVER(dir), err,
db0a9593
BS		 7771 &exception);
7772 } while (exception.retry);
7773 return err;
7774}
7775
b03d735b
CL		 7776/*
7777 * This operation also signals the server that this client is
7778 * performing migration recovery. The server can stop returning
7779 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
7780 * appended to this compound to identify the client ID which is
7781 * performing recovery.
7782 */
7783static int _nfs40_proc_get_locations(struct inode *inode,
7784 struct nfs4_fs_locations *locations,
a52458b4 7785 struct page *page, const struct cred *cred)
b03d735b
CL		 7786{
7787 struct nfs_server *server = NFS_SERVER(inode);
7788 struct rpc_clnt *clnt = server->client;
7789 u32 bitmask[2] = {
7790 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
7791 };
7792 struct nfs4_fs_locations_arg args = {
7793 .clientid = server->nfs_client->cl_clientid,
7794 .fh = NFS_FH(inode),
7795 .page = page,
7796 .bitmask = bitmask,
7797 .migration = 1, /* skip LOOKUP */
7798 .renew = 1, /* append RENEW */
7799 };
7800 struct nfs4_fs_locations_res res = {
7801 .fs_locations = locations,
7802 .migration = 1,
7803 .renew = 1,
7804 };
7805 struct rpc_message msg = {
7806 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
7807 .rpc_argp = &args,
7808 .rpc_resp = &res,
7809 .rpc_cred = cred,
7810 };
7811 unsigned long now = jiffies;
7812 int status;
7813
7814 nfs_fattr_init(&locations->fattr);
7815 locations->server = server;
7816 locations->nlocations = 0;
7817
fba83f34 7818 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1);
b03d735b
CL		 7819 status = nfs4_call_sync_sequence(clnt, server, &msg,
7820 &args.seq_args, &res.seq_res);
7821 if (status)
7822 return status;
7823
7824 renew_lease(server, now);
7825 return 0;
7826}
7827
7828#ifdef CONFIG_NFS_V4_1
7829
7830/*
7831 * This operation also signals the server that this client is
7832 * performing migration recovery. The server can stop asserting
7833 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
7834 * performing this operation is identified in the SEQUENCE
7835 * operation in this compound.
7836 *
7837 * When the client supports GETATTR(fs_locations_info), it can
7838 * be plumbed in here.
7839 */
7840static int _nfs41_proc_get_locations(struct inode *inode,
7841 struct nfs4_fs_locations *locations,
a52458b4 7842 struct page *page, const struct cred *cred)
b03d735b
CL		 7843{
7844 struct nfs_server *server = NFS_SERVER(inode);
7845 struct rpc_clnt *clnt = server->client;
7846 u32 bitmask[2] = {
7847 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
7848 };
7849 struct nfs4_fs_locations_arg args = {
7850 .fh = NFS_FH(inode),
7851 .page = page,
7852 .bitmask = bitmask,
7853 .migration = 1, /* skip LOOKUP */
7854 };
7855 struct nfs4_fs_locations_res res = {
7856 .fs_locations = locations,
7857 .migration = 1,
7858 };
7859 struct rpc_message msg = {
7860 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
7861 .rpc_argp = &args,
7862 .rpc_resp = &res,
7863 .rpc_cred = cred,
7864 };
7865 int status;
7866
7867 nfs_fattr_init(&locations->fattr);
7868 locations->server = server;
7869 locations->nlocations = 0;
7870
fba83f34 7871 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1);
b03d735b
CL		 7872 status = nfs4_call_sync_sequence(clnt, server, &msg,
7873 &args.seq_args, &res.seq_res);
7874 if (status == NFS4_OK &&
7875 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
7876 status = -NFS4ERR_LEASE_MOVED;
7877 return status;
7878}
7879
7880#endif /* CONFIG_NFS_V4_1 */
7881
7882/**
7883 * nfs4_proc_get_locations - discover locations for a migrated FSID
7884 * @inode: inode on FSID that is migrating
7885 * @locations: result of query
7886 * @page: buffer
7887 * @cred: credential to use for this operation
7888 *
7889 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
7890 * operation failed, or a negative errno if a local error occurred.
7891 *
7892 * On success, "locations" is filled in, but if the server has
7893 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
7894 * asserted.
7895 *
7896 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
7897 * from this client that require migration recovery.
7898 */
7899int nfs4_proc_get_locations(struct inode *inode,
7900 struct nfs4_fs_locations *locations,
a52458b4 7901 struct page *page, const struct cred *cred)
b03d735b
CL		 7902{
7903 struct nfs_server *server = NFS_SERVER(inode);
7904 struct nfs_client *clp = server->nfs_client;
7905 const struct nfs4_mig_recovery_ops *ops =
7906 clp->cl_mvops->mig_recovery_ops;
0688e64b
TM		 7907 struct nfs4_exception exception = {
7908 .interruptible = true,
7909 };
b03d735b
CL		 7910 int status;
7911
7912 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
7913 (unsigned long long)server->fsid.major,
7914 (unsigned long long)server->fsid.minor,
7915 clp->cl_hostname);
7916 nfs_display_fhandle(NFS_FH(inode), __func__);
7917
7918 do {
7919 status = ops->get_locations(inode, locations, page, cred);
7920 if (status != -NFS4ERR_DELAY)
7921 break;
7922 nfs4_handle_exception(server, status, &exception);
7923 } while (exception.retry);
7924 return status;
7925}
7926
44c99933
CL		 7927/*
7928 * This operation also signals the server that this client is
7929 * performing "lease moved" recovery. The server can stop
7930 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
7931 * is appended to this compound to identify the client ID which is
7932 * performing recovery.
7933 */
a52458b4 7934static int _nfs40_proc_fsid_present(struct inode *inode, const struct cred *cred)
44c99933
CL		 7935{
7936 struct nfs_server *server = NFS_SERVER(inode);
7937 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
7938 struct rpc_clnt *clnt = server->client;
7939 struct nfs4_fsid_present_arg args = {
7940 .fh = NFS_FH(inode),
7941 .clientid = clp->cl_clientid,
7942 .renew = 1, /* append RENEW */
7943 };
7944 struct nfs4_fsid_present_res res = {
7945 .renew = 1,
7946 };
7947 struct rpc_message msg = {
7948 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
7949 .rpc_argp = &args,
7950 .rpc_resp = &res,
7951 .rpc_cred = cred,
7952 };
7953 unsigned long now = jiffies;
7954 int status;
7955
7956 res.fh = nfs_alloc_fhandle();
7957 if (res.fh == NULL)
7958 return -ENOMEM;
7959
fba83f34 7960 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1);
44c99933
CL		 7961 status = nfs4_call_sync_sequence(clnt, server, &msg,
7962 &args.seq_args, &res.seq_res);
7963 nfs_free_fhandle(res.fh);
7964 if (status)
7965 return status;
7966
7967 do_renew_lease(clp, now);
7968 return 0;
7969}
7970
7971#ifdef CONFIG_NFS_V4_1
7972
7973/*
7974 * This operation also signals the server that this client is
7975 * performing "lease moved" recovery. The server can stop asserting
7976 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
7977 * this operation is identified in the SEQUENCE operation in this
7978 * compound.
7979 */
a52458b4 7980static int _nfs41_proc_fsid_present(struct inode *inode, const struct cred *cred)
44c99933
CL		 7981{
7982 struct nfs_server *server = NFS_SERVER(inode);
7983 struct rpc_clnt *clnt = server->client;
7984 struct nfs4_fsid_present_arg args = {
7985 .fh = NFS_FH(inode),
7986 };
7987 struct nfs4_fsid_present_res res = {
7988 };
7989 struct rpc_message msg = {
7990 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
7991 .rpc_argp = &args,
7992 .rpc_resp = &res,
7993 .rpc_cred = cred,
7994 };
7995 int status;
7996
7997 res.fh = nfs_alloc_fhandle();
7998 if (res.fh == NULL)
7999 return -ENOMEM;
8000
fba83f34 8001 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1);
44c99933
CL		 8002 status = nfs4_call_sync_sequence(clnt, server, &msg,
8003 &args.seq_args, &res.seq_res);
8004 nfs_free_fhandle(res.fh);
8005 if (status == NFS4_OK &&
8006 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
8007 status = -NFS4ERR_LEASE_MOVED;
8008 return status;
8009}
8010
8011#endif /* CONFIG_NFS_V4_1 */
8012
8013/**
8014 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
8015 * @inode: inode on FSID to check
8016 * @cred: credential to use for this operation
8017 *
8018 * Server indicates whether the FSID is present, moved, or not
8019 * recognized. This operation is necessary to clear a LEASE_MOVED
8020 * condition for this client ID.
8021 *
8022 * Returns NFS4_OK if the FSID is present on this server,
8023 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
8024 * NFS4ERR code if some error occurred on the server, or a
8025 * negative errno if a local failure occurred.
8026 */
a52458b4 8027int nfs4_proc_fsid_present(struct inode *inode, const struct cred *cred)
44c99933
CL		 8028{
8029 struct nfs_server *server = NFS_SERVER(inode);
8030 struct nfs_client *clp = server->nfs_client;
8031 const struct nfs4_mig_recovery_ops *ops =
8032 clp->cl_mvops->mig_recovery_ops;
0688e64b
TM		 8033 struct nfs4_exception exception = {
8034 .interruptible = true,
8035 };
44c99933
CL		 8036 int status;
8037
8038 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
8039 (unsigned long long)server->fsid.major,
8040 (unsigned long long)server->fsid.minor,
8041 clp->cl_hostname);
8042 nfs_display_fhandle(NFS_FH(inode), __func__);
8043
8044 do {
8045 status = ops->fsid_present(inode, cred);
8046 if (status != -NFS4ERR_DELAY)
8047 break;
8048 nfs4_handle_exception(server, status, &exception);
8049 } while (exception.retry);
8050 return status;
8051}
8052
302fad7b 8053/*
a5250def
WAA		 8054 * If 'use_integrity' is true and the state managment nfs_client
8055 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
8056 * and the machine credential as per RFC3530bis and RFC5661 Security
8057 * Considerations sections. Otherwise, just use the user cred with the
8058 * filesystem's rpc_client.
5ec16a85 8059 */
a5250def 8060static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
5a5ea0d4
BS		 8061{
8062 int status;
50493364
AS		 8063 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
8064 struct nfs_client *clp = NFS_SERVER(dir)->nfs_client;
5a5ea0d4
BS		 8065 struct nfs4_secinfo_arg args = {
8066 .dir_fh = NFS_FH(dir),
8067 .name = name,
8068 };
8069 struct nfs4_secinfo_res res = {
8070 .flavors = flavors,
8071 };
8072 struct rpc_message msg = {
8073 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
8074 .rpc_argp = &args,
8075 .rpc_resp = &res,
8076 };
50493364
AS		 8077 struct nfs4_call_sync_data data = {
8078 .seq_server = NFS_SERVER(dir),
8079 .seq_args = &args.seq_args,
8080 .seq_res = &res.seq_res,
8081 };
8082 struct rpc_task_setup task_setup = {
8083 .rpc_client = clnt,
8084 .rpc_message = &msg,
8085 .callback_ops = clp->cl_mvops->call_sync_ops,
8086 .callback_data = &data,
8087 .flags = RPC_TASK_NO_ROUND_ROBIN,
8088 };
a52458b4 8089 const struct cred *cred = NULL;
a5250def
WAA		 8090
8091 if (use_integrity) {
50493364
AS		 8092 clnt = clp->cl_rpcclient;
8093 task_setup.rpc_client = clnt;
8094
8095 cred = nfs4_get_clid_cred(clp);
7cb852df 8096 msg.rpc_cred = cred;
a5250def 8097 }
5a5ea0d4
BS		 8098
8099 dprintk("NFS call secinfo %s\n", name->name);
8b5bee2e 8100
50493364
AS		 8101 nfs4_state_protect(clp, NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
8102 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0);
8103 status = nfs4_call_sync_custom(&task_setup);
8b5bee2e 8104
5a5ea0d4 8105 dprintk("NFS reply secinfo: %d\n", status);
a5250def 8106
a52458b4 8107 put_cred(cred);
5a5ea0d4
BS		 8108 return status;
8109}
8110
72de53ec
BS		 8111int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
8112 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4 8113{
0688e64b
TM		 8114 struct nfs4_exception exception = {
8115 .interruptible = true,
8116 };
5a5ea0d4
BS		 8117 int err;
8118 do {
a5250def
WAA		 8119 err = -NFS4ERR_WRONGSEC;
8120
8121 /* try to use integrity protection with machine cred */
8122 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
8123 err = _nfs4_proc_secinfo(dir, name, flavors, true);
8124
8125 /*
8126 * if unable to use integrity protection, or SECINFO with
8127 * integrity protection returns NFS4ERR_WRONGSEC (which is
8128 * disallowed by spec, but exists in deployed servers) use
8129 * the current filesystem's rpc_client and the user cred.
8130 */
8131 if (err == -NFS4ERR_WRONGSEC)
8132 err = _nfs4_proc_secinfo(dir, name, flavors, false);
8133
078ea3df
TM		 8134 trace_nfs4_secinfo(dir, name, err);
8135 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5a5ea0d4
BS		 8136 &exception);
8137 } while (exception.retry);
8138 return err;
8139}
8140
557134a3 8141#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 8142/*
8143 * Check the exchange flags returned by the server for invalid flags, having
8144 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
8145 * DS flags set.
8146 */
8c39076c 8147static int nfs4_check_cl_exchange_flags(u32 flags, u32 version)
357f54d6 8148{
8c39076c
OK		 8149 if (version >= 2 && (flags & ~EXCHGID4_2_FLAG_MASK_R))
8150 goto out_inval;
8151 else if (version < 2 && (flags & ~EXCHGID4_FLAG_MASK_R))
357f54d6
AA		 8152 goto out_inval;
8153 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
8154 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
8155 goto out_inval;
8156 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
8157 goto out_inval;
8158 return NFS_OK;
8159out_inval:
8160 return -NFS4ERR_INVAL;
8161}
8162
78fe0f41 8163static bool
79d4e1f0
CL		 8164nfs41_same_server_scope(struct nfs41_server_scope *a,
8165 struct nfs41_server_scope *b)
78fe0f41 8166{
49ad0145
AS		 8167 if (a->server_scope_sz != b->server_scope_sz)
8168 return false;
8169 return memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0;
78fe0f41
WAA		 8170}
8171
02a95dee
AA		 8172static void
8173nfs4_bind_one_conn_to_session_done(struct rpc_task *task, void *calldata)
8174{
5c441544 8175 struct nfs41_bind_conn_to_session_args *args = task->tk_msg.rpc_argp;
dff58530 8176 struct nfs41_bind_conn_to_session_res *res = task->tk_msg.rpc_resp;
5c441544
TM		 8177 struct nfs_client *clp = args->client;
8178
8179 switch (task->tk_status) {
8180 case -NFS4ERR_BADSESSION:
8181 case -NFS4ERR_DEADSESSION:
8182 nfs4_schedule_session_recovery(clp->cl_session,
8183 task->tk_status);
8184 }
dff58530
OK		 8185 if (args->dir == NFS4_CDFC4_FORE_OR_BOTH &&
8186 res->dir != NFS4_CDFS4_BOTH) {
8187 rpc_task_close_connection(task);
8188 if (args->retries++ < MAX_BIND_CONN_TO_SESSION_RETRIES)
8189 rpc_restart_call(task);
8190 }
02a95dee
AA		 8191}
8192
8193static const struct rpc_call_ops nfs4_bind_one_conn_to_session_ops = {
1c709b76 8194 .rpc_call_done = nfs4_bind_one_conn_to_session_done,
02a95dee
AA		 8195};
8196
7c44f1ae 8197/*
d9ddbf5d 8198 * nfs4_proc_bind_one_conn_to_session()
7c44f1ae
WAA		 8199 *
8200 * The 4.1 client currently uses the same TCP connection for the
8201 * fore and backchannel.
8202 */
d9ddbf5d
TM		 8203static
8204int nfs4_proc_bind_one_conn_to_session(struct rpc_clnt *clnt,
8205 struct rpc_xprt *xprt,
8206 struct nfs_client *clp,
a52458b4 8207 const struct cred *cred)
7c44f1ae
WAA		 8208{
8209 int status;
71a097c6
TM		 8210 struct nfs41_bind_conn_to_session_args args = {
8211 .client = clp,
8212 .dir = NFS4_CDFC4_FORE_OR_BOTH,
dff58530 8213 .retries = 0,
71a097c6 8214 };
7c44f1ae
WAA		 8215 struct nfs41_bind_conn_to_session_res res;
8216 struct rpc_message msg = {
8217 .rpc_proc =
8218 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
71a097c6 8219 .rpc_argp = &args,
7c44f1ae 8220 .rpc_resp = &res,
2cf047c9 8221 .rpc_cred = cred,
7c44f1ae 8222 };
d9ddbf5d
TM		 8223 struct rpc_task_setup task_setup_data = {
8224 .rpc_client = clnt,
8225 .rpc_xprt = xprt,
02a95dee 8226 .callback_ops = &nfs4_bind_one_conn_to_session_ops,
d9ddbf5d
TM		 8227 .rpc_message = &msg,
8228 .flags = RPC_TASK_TIMEOUT,
8229 };
8230 struct rpc_task *task;
7c44f1ae 8231
71a097c6
TM		 8232 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id);
8233 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN))
8234 args.dir = NFS4_CDFC4_FORE;
7c44f1ae 8235
d9ddbf5d
TM		 8236 /* Do not set the backchannel flag unless this is clnt->cl_xprt */
8237 if (xprt != rcu_access_pointer(clnt->cl_xprt))
8238 args.dir = NFS4_CDFC4_FORE;
8239
8240 task = rpc_run_task(&task_setup_data);
8241 if (!IS_ERR(task)) {
8242 status = task->tk_status;
8243 rpc_put_task(task);
8244 } else
8245 status = PTR_ERR(task);
c6d01c6f 8246 trace_nfs4_bind_conn_to_session(clp, status);
7c44f1ae 8247 if (status == 0) {
71a097c6 8248 if (memcmp(res.sessionid.data,
7c44f1ae
WAA		 8249 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
8250 dprintk("NFS: %s: Session ID mismatch\n", __func__);
c7ae7639 8251 return -EIO;
7c44f1ae 8252 }
71a097c6 8253 if ((res.dir & args.dir) != res.dir || res.dir == 0) {
7c44f1ae
WAA		 8254 dprintk("NFS: %s: Unexpected direction from server\n",
8255 __func__);
c7ae7639 8256 return -EIO;
7c44f1ae 8257 }
71a097c6 8258 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) {
7c44f1ae
WAA		 8259 dprintk("NFS: %s: Server returned RDMA mode = true\n",
8260 __func__);
c7ae7639 8261 return -EIO;
7c44f1ae
WAA		 8262 }
8263 }
c7ae7639 8264
7c44f1ae
WAA		 8265 return status;
8266}
8267
d9ddbf5d
TM		 8268struct rpc_bind_conn_calldata {
8269 struct nfs_client *clp;
a52458b4 8270 const struct cred *cred;
d9ddbf5d
TM		 8271};
8272
8273static int
8274nfs4_proc_bind_conn_to_session_callback(struct rpc_clnt *clnt,
8275 struct rpc_xprt *xprt,
8276 void *calldata)
8277{
8278 struct rpc_bind_conn_calldata *p = calldata;
8279
8280 return nfs4_proc_bind_one_conn_to_session(clnt, xprt, p->clp, p->cred);
8281}
8282
a52458b4 8283int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, const struct cred *cred)
d9ddbf5d
TM		 8284{
8285 struct rpc_bind_conn_calldata data = {
8286 .clp = clp,
8287 .cred = cred,
8288 };
8289 return rpc_clnt_iterate_for_each_xprt(clp->cl_rpcclient,
8290 nfs4_proc_bind_conn_to_session_callback, &data);
8291}
8292
99fe60d0 8293/*
fa940720
WAA		 8294 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
8295 * and operations we'd like to see to enable certain features in the allow map
2031cd1a
WAA		 8296 */
8297static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
8298 .how = SP4_MACH_CRED,
8299 .enforce.u.words = {
8300 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
8301 1 << (OP_EXCHANGE_ID - 32) |
8302 1 << (OP_CREATE_SESSION - 32) |
8303 1 << (OP_DESTROY_SESSION - 32) |
8304 1 << (OP_DESTROY_CLIENTID - 32)
fa940720
WAA		 8305 },
8306 .allow.u.words = {
8307 [0] = 1 << (OP_CLOSE) |
99ade3c7 8308 1 << (OP_OPEN_DOWNGRADE) |
a0279625 8309 1 << (OP_LOCKU) |
99ade3c7 8310 1 << (OP_DELEGRETURN) |
a0279625 8311 1 << (OP_COMMIT),
8b5bee2e 8312 [1] = 1 << (OP_SECINFO - 32) |
3787d506 8313 1 << (OP_SECINFO_NO_NAME - 32) |
99ade3c7 8314 1 << (OP_LAYOUTRETURN - 32) |
3787d506 8315 1 << (OP_TEST_STATEID - 32) |
a0279625
WAA		 8316 1 << (OP_FREE_STATEID - 32) |
8317 1 << (OP_WRITE - 32)
2031cd1a
WAA		 8318 }
8319};
8320
8321/*
8322 * Select the state protection mode for client `clp' given the server results
8323 * from exchange_id in `sp'.
99fe60d0 8324 *
2031cd1a
WAA		 8325 * Returns 0 on success, negative errno otherwise.
8326 */
8327static int nfs4_sp4_select_mode(struct nfs_client *clp,
8328 struct nfs41_state_protection *sp)
8329{
8330 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
8331 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
8332 1 << (OP_EXCHANGE_ID - 32) |
8333 1 << (OP_CREATE_SESSION - 32) |
8334 1 << (OP_DESTROY_SESSION - 32) |
8335 1 << (OP_DESTROY_CLIENTID - 32)
8336 };
937e3133 8337 unsigned long flags = 0;
2031cd1a 8338 unsigned int i;
937e3133 8339 int ret = 0;
2031cd1a
WAA		 8340
8341 if (sp->how == SP4_MACH_CRED) {
8342 /* Print state protect result */
8343 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
8344 for (i = 0; i <= LAST_NFS4_OP; i++) {
8345 if (test_bit(i, sp->enforce.u.longs))
8346 dfprintk(MOUNT, " enforce op %d\n", i);
8347 if (test_bit(i, sp->allow.u.longs))
8348 dfprintk(MOUNT, " allow op %d\n", i);
8349 }
8350
8351 /* make sure nothing is on enforce list that isn't supported */
8352 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
8353 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
8354 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
937e3133
TM		 8355 ret = -EINVAL;
8356 goto out;
2031cd1a
WAA		 8357 }
8358 }
8359
8360 /*
8361 * Minimal mode - state operations are allowed to use machine
8362 * credential. Note this already happens by default, so the
8363 * client doesn't have to do anything more than the negotiation.
8364 *
8365 * NOTE: we don't care if EXCHANGE_ID is in the list -
8366 * we're already using the machine cred for exchange_id
8367 * and will never use a different cred.
8368 */
8369 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
8370 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
8371 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
8372 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
8373 dfprintk(MOUNT, "sp4_mach_cred:\n");
8374 dfprintk(MOUNT, " minimal mode enabled\n");
937e3133 8375 __set_bit(NFS_SP4_MACH_CRED_MINIMAL, &flags);
2031cd1a
WAA		 8376 } else {
8377 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
937e3133
TM		 8378 ret = -EINVAL;
8379 goto out;
2031cd1a 8380 }
fa940720
WAA		 8381
8382 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
99ade3c7
AE		 8383 test_bit(OP_OPEN_DOWNGRADE, sp->allow.u.longs) &&
8384 test_bit(OP_DELEGRETURN, sp->allow.u.longs) &&
fa940720
WAA		 8385 test_bit(OP_LOCKU, sp->allow.u.longs)) {
8386 dfprintk(MOUNT, " cleanup mode enabled\n");
937e3133 8387 __set_bit(NFS_SP4_MACH_CRED_CLEANUP, &flags);
fa940720 8388 }
8b5bee2e 8389
99ade3c7
AE		 8390 if (test_bit(OP_LAYOUTRETURN, sp->allow.u.longs)) {
8391 dfprintk(MOUNT, " pnfs cleanup mode enabled\n");
937e3133 8392 __set_bit(NFS_SP4_MACH_CRED_PNFS_CLEANUP, &flags);
99ade3c7
AE		 8393 }
8394
8b5bee2e
WAA		 8395 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
8396 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
8397 dfprintk(MOUNT, " secinfo mode enabled\n");
937e3133 8398 __set_bit(NFS_SP4_MACH_CRED_SECINFO, &flags);
8b5bee2e 8399 }
3787d506
WAA		 8400
8401 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
8402 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
8403 dfprintk(MOUNT, " stateid mode enabled\n");
937e3133 8404 __set_bit(NFS_SP4_MACH_CRED_STATEID, &flags);
3787d506 8405 }
8c21c62c
WAA		 8406
8407 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
8408 dfprintk(MOUNT, " write mode enabled\n");
937e3133 8409 __set_bit(NFS_SP4_MACH_CRED_WRITE, &flags);
8c21c62c
WAA		 8410 }
8411
8412 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
8413 dfprintk(MOUNT, " commit mode enabled\n");
937e3133 8414 __set_bit(NFS_SP4_MACH_CRED_COMMIT, &flags);
8c21c62c 8415 }
2031cd1a 8416 }
937e3133
TM		 8417out:
8418 clp->cl_sp4_flags = flags;
72bf75cf 8419 return ret;
2031cd1a
WAA		 8420}
8421
8d89bd70
AA		 8422struct nfs41_exchange_id_data {
8423 struct nfs41_exchange_id_res res;
8424 struct nfs41_exchange_id_args args;
8d89bd70
AA		 8425};
8426
8d89bd70
AA		 8427static void nfs4_exchange_id_release(void *data)
8428{
8429 struct nfs41_exchange_id_data *cdata =
8430 (struct nfs41_exchange_id_data *)data;
8431
63513232 8432 nfs_put_client(cdata->args.client);
8d89bd70
AA		 8433 kfree(cdata->res.impl_id);
8434 kfree(cdata->res.server_scope);
8435 kfree(cdata->res.server_owner);
8436 kfree(cdata);
8437}
8438
8439static const struct rpc_call_ops nfs4_exchange_id_call_ops = {
8d89bd70
AA		 8440 .rpc_release = nfs4_exchange_id_release,
8441};
8442
2031cd1a
WAA		 8443/*
8444 * _nfs4_proc_exchange_id()
6bbb4ae8 8445 *
2031cd1a 8446 * Wrapper for EXCHANGE_ID operation.
99fe60d0 8447 */
9c760d1f 8448static struct rpc_task *
a52458b4 8449nfs4_run_exchange_id(struct nfs_client *clp, const struct cred *cred,
ad0849a7 8450 u32 sp4_how, struct rpc_xprt *xprt)
99fe60d0 8451{
99fe60d0
BH		 8452 struct rpc_message msg = {
8453 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
99fe60d0
BH		 8454 .rpc_cred = cred,
8455 };
8d89bd70
AA		 8456 struct rpc_task_setup task_setup_data = {
8457 .rpc_client = clp->cl_rpcclient,
8458 .callback_ops = &nfs4_exchange_id_call_ops,
8459 .rpc_message = &msg,
5a0c257f 8460 .flags = RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN,
8d89bd70
AA		 8461 };
8462 struct nfs41_exchange_id_data *calldata;
e917f0d1 8463 int status;
8d89bd70 8464
212bf41d 8465 if (!refcount_inc_not_zero(&clp->cl_count))
9c760d1f 8466 return ERR_PTR(-EIO);
8d89bd70 8467
9c760d1f 8468 status = -ENOMEM;
8d89bd70 8469 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
9c760d1f
TM		 8470 if (!calldata)
8471 goto out;
99fe60d0 8472
fd40559c 8473 nfs4_init_boot_verifier(clp, &calldata->args.verifier);
873e3851
JL		 8474
8475 status = nfs4_init_uniform_client_string(clp);
8476 if (status)
8d89bd70 8477 goto out_calldata;
3a6bb738 8478
8d89bd70
AA		 8479 calldata->res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
8480 GFP_NOFS);
8481 status = -ENOMEM;
8482 if (unlikely(calldata->res.server_owner == NULL))
8483 goto out_calldata;
78fe0f41 8484
8d89bd70 8485 calldata->res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 8486 GFP_NOFS);
8d89bd70 8487 if (unlikely(calldata->res.server_scope == NULL))
acdeb69d 8488 goto out_server_owner;
78fe0f41 8489
8d89bd70
AA		 8490 calldata->res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
8491 if (unlikely(calldata->res.impl_id == NULL))
7d2ed9ac 8492 goto out_server_scope;
7d2ed9ac 8493
2031cd1a
WAA		 8494 switch (sp4_how) {
8495 case SP4_NONE:
8d89bd70 8496 calldata->args.state_protect.how = SP4_NONE;
2031cd1a
WAA		 8497 break;
8498
8499 case SP4_MACH_CRED:
8d89bd70 8500 calldata->args.state_protect = nfs4_sp4_mach_cred_request;
2031cd1a
WAA		 8501 break;
8502
8503 default:
8504 /* unsupported! */
8505 WARN_ON_ONCE(1);
8506 status = -EINVAL;
6b55970b 8507 goto out_impl_id;
2031cd1a 8508 }
ad0849a7 8509 if (xprt) {
ad0849a7 8510 task_setup_data.rpc_xprt = xprt;
d9cb7330 8511 task_setup_data.flags |= RPC_TASK_SOFTCONN;
fd40559c
TM		 8512 memcpy(calldata->args.verifier.data, clp->cl_confirm.data,
8513 sizeof(calldata->args.verifier.data));
ad0849a7 8514 }
8d89bd70 8515 calldata->args.client = clp;
8d89bd70 8516 calldata->args.flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
bfab2817
TM		 8517 EXCHGID4_FLAG_BIND_PRINC_STATEID;
8518#ifdef CONFIG_NFS_V4_1_MIGRATION
8519 calldata->args.flags |= EXCHGID4_FLAG_SUPP_MOVED_MIGR;
8d89bd70
AA		 8520#endif
8521 msg.rpc_argp = &calldata->args;
8522 msg.rpc_resp = &calldata->res;
8523 task_setup_data.callback_data = calldata;
2031cd1a 8524
9c760d1f 8525 return rpc_run_task(&task_setup_data);
8d89bd70
AA		 8526
8527out_impl_id:
8528 kfree(calldata->res.impl_id);
8529out_server_scope:
8530 kfree(calldata->res.server_scope);
8531out_server_owner:
8532 kfree(calldata->res.server_owner);
8533out_calldata:
8534 kfree(calldata);
9c760d1f 8535out:
63513232 8536 nfs_put_client(clp);
9c760d1f
TM		 8537 return ERR_PTR(status);
8538}
8539
8540/*
8541 * _nfs4_proc_exchange_id()
8542 *
8543 * Wrapper for EXCHANGE_ID operation.
8544 */
a52458b4 8545static int _nfs4_proc_exchange_id(struct nfs_client *clp, const struct cred *cred,
9c760d1f
TM		 8546 u32 sp4_how)
8547{
8548 struct rpc_task *task;
8549 struct nfs41_exchange_id_args *argp;
8550 struct nfs41_exchange_id_res *resp;
7dc2993a 8551 unsigned long now = jiffies;
9c760d1f
TM		 8552 int status;
8553
8554 task = nfs4_run_exchange_id(clp, cred, sp4_how, NULL);
8555 if (IS_ERR(task))
8556 return PTR_ERR(task);
8557
8558 argp = task->tk_msg.rpc_argp;
8559 resp = task->tk_msg.rpc_resp;
8560 status = task->tk_status;
8561 if (status != 0)
8562 goto out;
8563
8c39076c
OK		 8564 status = nfs4_check_cl_exchange_flags(resp->flags,
8565 clp->cl_mvops->minor_version);
9c760d1f
TM		 8566 if (status != 0)
8567 goto out;
8568
8569 status = nfs4_sp4_select_mode(clp, &resp->state_protect);
8570 if (status != 0)
8571 goto out;
8572
7dc2993a
RM		 8573 do_renew_lease(clp, now);
8574
9c760d1f
TM		 8575 clp->cl_clientid = resp->clientid;
8576 clp->cl_exchange_flags = resp->flags;
8577 clp->cl_seqid = resp->seqid;
8578 /* Client ID is not confirmed */
8579 if (!(resp->flags & EXCHGID4_FLAG_CONFIRMED_R))
8580 clear_bit(NFS4_SESSION_ESTABLISHED,
8581 &clp->cl_session->session_state);
8582
8583 if (clp->cl_serverscope != NULL &&
8584 !nfs41_same_server_scope(clp->cl_serverscope,
8585 resp->server_scope)) {
8586 dprintk("%s: server_scope mismatch detected\n",
8587 __func__);
8588 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
8589 }
8590
8591 swap(clp->cl_serverowner, resp->server_owner);
8592 swap(clp->cl_serverscope, resp->server_scope);
8593 swap(clp->cl_implid, resp->impl_id);
8594
8595 /* Save the EXCHANGE_ID verifier session trunk tests */
8596 memcpy(clp->cl_confirm.data, argp->verifier.data,
8597 sizeof(clp->cl_confirm.data));
8598out:
8599 trace_nfs4_exchange_id(clp, status);
8600 rpc_put_task(task);
8601 return status;
99fe60d0
BH		 8602}
8603
2031cd1a
WAA		 8604/*
8605 * nfs4_proc_exchange_id()
8606 *
8607 * Returns zero, a negative errno, or a negative NFS4ERR status code.
8608 *
8609 * Since the clientid has expired, all compounds using sessions
8610 * associated with the stale clientid will be returning
8611 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
8612 * be in some phase of session reset.
8613 *
8614 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
8615 */
a52458b4 8616int nfs4_proc_exchange_id(struct nfs_client *clp, const struct cred *cred)
2031cd1a
WAA		 8617{
8618 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
8619 int status;
8620
8621 /* try SP4_MACH_CRED if krb5i/p */
8622 if (authflavor == RPC_AUTH_GSS_KRB5I ||
8623 authflavor == RPC_AUTH_GSS_KRB5P) {
9c760d1f 8624 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
2031cd1a
WAA		 8625 if (!status)
8626 return 0;
8627 }
8628
8629 /* try SP4_NONE */
9c760d1f 8630 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
2031cd1a
WAA		 8631}
8632
04fa2c6b
AA		 8633/**
8634 * nfs4_test_session_trunk
8635 *
8636 * This is an add_xprt_test() test function called from
8637 * rpc_clnt_setup_test_and_add_xprt.
8638 *
8639 * The rpc_xprt_switch is referrenced by rpc_clnt_setup_test_and_add_xprt
8640 * and is dereferrenced in nfs4_exchange_id_release
8641 *
8642 * Upon success, add the new transport to the rpc_clnt
8643 *
8644 * @clnt: struct rpc_clnt to get new transport
8645 * @xprt: the rpc_xprt to test
8646 * @data: call data for _nfs4_proc_exchange_id.
8647 */
10e037d1 8648void nfs4_test_session_trunk(struct rpc_clnt *clnt, struct rpc_xprt *xprt,
04fa2c6b
AA		 8649 void *data)
8650{
8651 struct nfs4_add_xprt_data *adata = (struct nfs4_add_xprt_data *)data;
9c760d1f
TM		 8652 struct rpc_task *task;
8653 int status;
8654
04fa2c6b
AA		 8655 u32 sp4_how;
8656
8657 dprintk("--> %s try %s\n", __func__,
8658 xprt->address_strings[RPC_DISPLAY_ADDR]);
8659
8660 sp4_how = (adata->clp->cl_sp4_flags == 0 ? SP4_NONE : SP4_MACH_CRED);
8661
8662 /* Test connection for session trunking. Async exchange_id call */
9c760d1f
TM		 8663 task = nfs4_run_exchange_id(adata->clp, adata->cred, sp4_how, xprt);
8664 if (IS_ERR(task))
10e037d1 8665 return;
9c760d1f
TM		 8666
8667 status = task->tk_status;
8668 if (status == 0)
8669 status = nfs4_detect_session_trunking(adata->clp,
8670 task->tk_msg.rpc_resp, xprt);
8671
10e037d1
S		 8672 if (status == 0)
8673 rpc_clnt_xprt_switch_add_xprt(clnt, xprt);
8674
9c760d1f 8675 rpc_put_task(task);
2031cd1a 8676}
04fa2c6b 8677EXPORT_SYMBOL_GPL(nfs4_test_session_trunk);
2031cd1a 8678
66245539 8679static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
a52458b4 8680 const struct cred *cred)
66245539
TM		 8681{
8682 struct rpc_message msg = {
8683 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
8684 .rpc_argp = clp,
8685 .rpc_cred = cred,
8686 };
8687 int status;
8688
5a0c257f
N		 8689 status = rpc_call_sync(clp->cl_rpcclient, &msg,
8690 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN);
c6d01c6f 8691 trace_nfs4_destroy_clientid(clp, status);
66245539 8692 if (status)
02c67525 8693 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 8694 "DESTROY_CLIENTID.", status, clp->cl_hostname);
8695 return status;
8696}
8697
8698static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
a52458b4 8699 const struct cred *cred)
66245539
TM		 8700{
8701 unsigned int loop;
8702 int ret;
8703
8704 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
8705 ret = _nfs4_proc_destroy_clientid(clp, cred);
8706 switch (ret) {
8707 case -NFS4ERR_DELAY:
8708 case -NFS4ERR_CLIENTID_BUSY:
8709 ssleep(1);
8710 break;
8711 default:
8712 return ret;
8713 }
8714 }
8715 return 0;
8716}
8717
8718int nfs4_destroy_clientid(struct nfs_client *clp)
8719{
a52458b4 8720 const struct cred *cred;
66245539
TM		 8721 int ret = 0;
8722
8723 if (clp->cl_mvops->minor_version < 1)
8724 goto out;
8725 if (clp->cl_exchange_flags == 0)
8726 goto out;
05f4c350
CL		 8727 if (clp->cl_preserve_clid)
8728 goto out;
73d8bde5 8729 cred = nfs4_get_clid_cred(clp);
66245539 8730 ret = nfs4_proc_destroy_clientid(clp, cred);
a52458b4 8731 put_cred(cred);
66245539
TM		 8732 switch (ret) {
8733 case 0:
8734 case -NFS4ERR_STALE_CLIENTID:
8735 clp->cl_exchange_flags = 0;
8736 }
8737out:
8738 return ret;
8739}
8740
0efb01b2
DB		 8741#endif /* CONFIG_NFS_V4_1 */
8742
2050f0cc
AA		 8743struct nfs4_get_lease_time_data {
8744 struct nfs4_get_lease_time_args *args;
8745 struct nfs4_get_lease_time_res *res;
8746 struct nfs_client *clp;
8747};
8748
8749static void nfs4_get_lease_time_prepare(struct rpc_task *task,
8750 void *calldata)
8751{
2050f0cc
AA		 8752 struct nfs4_get_lease_time_data *data =
8753 (struct nfs4_get_lease_time_data *)calldata;
8754
8755 dprintk("--> %s\n", __func__);
8756 /* just setup sequence, do not trigger session recovery
8757 since we're invoked within one */
7981c8a6 8758 nfs4_setup_sequence(data->clp,
d9afbd1b
TM		 8759 &data->args->la_seq_args,
8760 &data->res->lr_seq_res,
8761 task);
2050f0cc
AA		 8762 dprintk("<-- %s\n", __func__);
8763}
8764
8765/*
8766 * Called from nfs4_state_manager thread for session setup, so don't recover
8767 * from sequence operation or clientid errors.
8768 */
8769static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
8770{
8771 struct nfs4_get_lease_time_data *data =
8772 (struct nfs4_get_lease_time_data *)calldata;
8773
8774 dprintk("--> %s\n", __func__);
0efb01b2 8775 if (!nfs4_sequence_done(task, &data->res->lr_seq_res))
14516c3a 8776 return;
2050f0cc
AA		 8777 switch (task->tk_status) {
8778 case -NFS4ERR_DELAY:
8779 case -NFS4ERR_GRACE:
8780 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
8781 rpc_delay(task, NFS4_POLL_RETRY_MIN);
8782 task->tk_status = 0;
df561f66 8783 fallthrough;
a8a4ae3a 8784 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 8785 rpc_restart_call_prepare(task);
2050f0cc
AA		 8786 return;
8787 }
2050f0cc
AA		 8788 dprintk("<-- %s\n", __func__);
8789}
8790
17280175 8791static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 8792 .rpc_call_prepare = nfs4_get_lease_time_prepare,
8793 .rpc_call_done = nfs4_get_lease_time_done,
8794};
8795
8796int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
8797{
2050f0cc
AA		 8798 struct nfs4_get_lease_time_args args;
8799 struct nfs4_get_lease_time_res res = {
8800 .lr_fsinfo = fsinfo,
8801 };
8802 struct nfs4_get_lease_time_data data = {
8803 .args = &args,
8804 .res = &res,
8805 .clp = clp,
8806 };
8807 struct rpc_message msg = {
8808 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
8809 .rpc_argp = &args,
8810 .rpc_resp = &res,
8811 };
8812 struct rpc_task_setup task_setup = {
8813 .rpc_client = clp->cl_rpcclient,
8814 .rpc_message = &msg,
8815 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 8816 .callback_data = &data,
8817 .flags = RPC_TASK_TIMEOUT,
2050f0cc 8818 };
2050f0cc 8819
fba83f34 8820 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0, 1);
f836b27e 8821 return nfs4_call_sync_custom(&task_setup);
2050f0cc
AA		 8822}
8823
0efb01b2
DB		 8824#ifdef CONFIG_NFS_V4_1
8825
fc931582
AA		 8826/*
8827 * Initialize the values to be used by the client in CREATE_SESSION
8828 * If nfs4_init_session set the fore channel request and response sizes,
8829 * use them.
8830 *
8831 * Set the back channel max_resp_sz_cached to zero to force the client to
8832 * always set csa_cachethis to FALSE because the current implementation
8833 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
8834 */
6b26cc8c
CL		 8835static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args,
8836 struct rpc_clnt *clnt)
fc931582 8837{
18aad3d5 8838 unsigned int max_rqst_sz, max_resp_sz;
6b26cc8c 8839 unsigned int max_bc_payload = rpc_max_bc_payload(clnt);
7402a4fe 8840 unsigned int max_bc_slots = rpc_num_bc_slots(clnt);
18aad3d5
AA		 8841
8842 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
8843 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 8844
fc931582 8845 /* Fore channel attributes */
18aad3d5
AA		 8846 args->fc_attrs.max_rqst_sz = max_rqst_sz;
8847 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 8848 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 8849 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 8850
8851 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 8852 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 8853 __func__,
8854 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 8855 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 8856
8857 /* Back channel attributes */
6b26cc8c
CL		 8858 args->bc_attrs.max_rqst_sz = max_bc_payload;
8859 args->bc_attrs.max_resp_sz = max_bc_payload;
fc931582
AA		 8860 args->bc_attrs.max_resp_sz_cached = 0;
8861 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
62421cd9 8862 args->bc_attrs.max_reqs = max_t(unsigned short, max_session_cb_slots, 1);
7402a4fe
TM		 8863 if (args->bc_attrs.max_reqs > max_bc_slots)
8864 args->bc_attrs.max_reqs = max_bc_slots;
fc931582
AA		 8865
8866 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
8867 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
8868 __func__,
8869 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
8870 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
8871 args->bc_attrs.max_reqs);
8872}
8873
79969dd1
TM		 8874static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args,
8875 struct nfs41_create_session_res *res)
8d35301d 8876{
43c2e885 8877 struct nfs4_channel_attrs *sent = &args->fc_attrs;
79969dd1 8878 struct nfs4_channel_attrs *rcvd = &res->fc_attrs;
43c2e885 8879
43c2e885
BF		 8880 if (rcvd->max_resp_sz > sent->max_resp_sz)
8881 return -EINVAL;
8882 /*
8883 * Our requested max_ops is the minimum we need; we're not
8884 * prepared to break up compounds into smaller pieces than that.
8885 * So, no point even trying to continue if the server won't
8886 * cooperate:
8887 */
8888 if (rcvd->max_ops < sent->max_ops)
8889 return -EINVAL;
8890 if (rcvd->max_reqs == 0)
8891 return -EINVAL;
b4b9a0c1
VG		 8892 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
8893 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 8894 return 0;
8d35301d
AA		 8895}
8896
79969dd1
TM		 8897static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args,
8898 struct nfs41_create_session_res *res)
43c2e885
BF		 8899{
8900 struct nfs4_channel_attrs *sent = &args->bc_attrs;
79969dd1 8901 struct nfs4_channel_attrs *rcvd = &res->bc_attrs;
8d35301d 8902
b1c0df5f
TM		 8903 if (!(res->flags & SESSION4_BACK_CHAN))
8904 goto out;
43c2e885
BF		 8905 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
8906 return -EINVAL;
8907 if (rcvd->max_resp_sz < sent->max_resp_sz)
8908 return -EINVAL;
8909 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
8910 return -EINVAL;
5405fc44 8911 if (rcvd->max_ops > sent->max_ops)
43c2e885 8912 return -EINVAL;
5405fc44 8913 if (rcvd->max_reqs > sent->max_reqs)
43c2e885 8914 return -EINVAL;
b1c0df5f 8915out:
43c2e885
BF		 8916 return 0;
8917}
8d35301d 8918
8d35301d 8919static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
79969dd1 8920 struct nfs41_create_session_res *res)
8d35301d 8921{
43c2e885 8922 int ret;
8d35301d 8923
79969dd1 8924 ret = nfs4_verify_fore_channel_attrs(args, res);
43c2e885
BF		 8925 if (ret)
8926 return ret;
79969dd1
TM		 8927 return nfs4_verify_back_channel_attrs(args, res);
8928}
8929
8930static void nfs4_update_session(struct nfs4_session *session,
8931 struct nfs41_create_session_res *res)
8932{
8933 nfs4_copy_sessionid(&session->sess_id, &res->sessionid);
e11259f9
TM		 8934 /* Mark client id and session as being confirmed */
8935 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;
8936 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state);
79969dd1
TM		 8937 session->flags = res->flags;
8938 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs));
b1c0df5f
TM		 8939 if (res->flags & SESSION4_BACK_CHAN)
8940 memcpy(&session->bc_attrs, &res->bc_attrs,
8941 sizeof(session->bc_attrs));
8d35301d
AA		 8942}
8943
848f5bda 8944static int _nfs4_proc_create_session(struct nfs_client *clp,
a52458b4 8945 const struct cred *cred)
fc931582
AA		 8946{
8947 struct nfs4_session *session = clp->cl_session;
8948 struct nfs41_create_session_args args = {
8949 .client = clp,
79969dd1
TM		 8950 .clientid = clp->cl_clientid,
8951 .seqid = clp->cl_seqid,
fc931582
AA		 8952 .cb_program = NFS4_CALLBACK,
8953 };
79969dd1
TM		 8954 struct nfs41_create_session_res res;
8955
fc931582
AA		 8956 struct rpc_message msg = {
8957 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
8958 .rpc_argp = &args,
8959 .rpc_resp = &res,
848f5bda 8960 .rpc_cred = cred,
fc931582
AA		 8961 };
8962 int status;
8963
6b26cc8c 8964 nfs4_init_channel_attrs(&args, clp->cl_rpcclient);
0f91421e 8965 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 8966
5a0c257f
N		 8967 status = rpc_call_sync(session->clp->cl_rpcclient, &msg,
8968 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN);
c6d01c6f 8969 trace_nfs4_create_session(clp, status);
fc931582 8970
b519d408
TM		 8971 switch (status) {
8972 case -NFS4ERR_STALE_CLIENTID:
8973 case -NFS4ERR_DELAY:
8974 case -ETIMEDOUT:
8975 case -EACCES:
8976 case -EAGAIN:
8977 goto out;
8b98a532 8978 }
b519d408
TM		 8979
8980 clp->cl_seqid++;
43095d39 8981 if (!status) {
8d35301d 8982 /* Verify the session's negotiated channel_attrs values */
79969dd1 8983 status = nfs4_verify_channel_attrs(&args, &res);
fc931582 8984 /* Increment the clientid slot sequence id */
79969dd1
TM		 8985 if (status)
8986 goto out;
8987 nfs4_update_session(session, &res);
fc931582 8988 }
79969dd1 8989out:
fc931582
AA		 8990 return status;
8991}
8992
8993/*
8994 * Issues a CREATE_SESSION operation to the server.
8995 * It is the responsibility of the caller to verify the session is
8996 * expired before calling this routine.
8997 */
a52458b4 8998int nfs4_proc_create_session(struct nfs_client *clp, const struct cred *cred)
fc931582
AA		 8999{
9000 int status;
9001 unsigned *ptr;
fc931582
AA		 9002 struct nfs4_session *session = clp->cl_session;
9003
9004 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
9005
848f5bda 9006 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 9007 if (status)
9008 goto out;
9009
aacd5537
AA		 9010 /* Init or reset the session slot tables */
9011 status = nfs4_setup_session_slot_tables(session);
9012 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 9013 if (status)
9014 goto out;
9015
9016 ptr = (unsigned *)&session->sess_id.data[0];
9017 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
9018 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 9019out:
9020 dprintk("<-- %s\n", __func__);
9021 return status;
9022}
9023
0f3e66c6
AA		 9024/*
9025 * Issue the over-the-wire RPC DESTROY_SESSION.
9026 * The caller must serialize access to this routine.
9027 */
848f5bda 9028int nfs4_proc_destroy_session(struct nfs4_session *session,
a52458b4 9029 const struct cred *cred)
0f3e66c6 9030{
848f5bda
TM		 9031 struct rpc_message msg = {
9032 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
9033 .rpc_argp = session,
9034 .rpc_cred = cred,
9035 };
0f3e66c6 9036 int status = 0;
0f3e66c6
AA		 9037
9038 dprintk("--> nfs4_proc_destroy_session\n");
9039
9040 /* session is still being setup */
e11259f9
TM		 9041 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state))
9042 return 0;
0f3e66c6 9043
5a0c257f
N		 9044 status = rpc_call_sync(session->clp->cl_rpcclient, &msg,
9045 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN);
c6d01c6f 9046 trace_nfs4_destroy_session(session->clp, status);
0f3e66c6
AA		 9047
9048 if (status)
08106ac7 9049 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 9050 "Session has been destroyed regardless...\n", status);
9051
9052 dprintk("<-- nfs4_proc_destroy_session\n");
9053 return status;
9054}
9055
fc01cea9
AA		 9056/*
9057 * Renew the cl_session lease.
9058 */
d5f8d3fe
TM		 9059struct nfs4_sequence_data {
9060 struct nfs_client *clp;
9061 struct nfs4_sequence_args args;
9062 struct nfs4_sequence_res res;
9063};
9064
dc96aef9
AB		 9065static void nfs41_sequence_release(void *data)
9066{
d5f8d3fe
TM		 9067 struct nfs4_sequence_data *calldata = data;
9068 struct nfs_client *clp = calldata->clp;
dc96aef9 9069
212bf41d 9070 if (refcount_read(&clp->cl_count) > 1)
7135840f
AB		 9071 nfs4_schedule_state_renewal(clp);
9072 nfs_put_client(clp);
d5f8d3fe 9073 kfree(calldata);
dc96aef9
AB		 9074}
9075
aa5190d0
TM		 9076static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
9077{
9078 switch(task->tk_status) {
9079 case -NFS4ERR_DELAY:
aa5190d0
TM		 9080 rpc_delay(task, NFS4_POLL_RETRY_MAX);
9081 return -EAGAIN;
9082 default:
0400a6b0 9083 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 9084 }
9085 return 0;
9086}
9087
dc96aef9 9088static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 9089{
d5f8d3fe
TM		 9090 struct nfs4_sequence_data *calldata = data;
9091 struct nfs_client *clp = calldata->clp;
fc01cea9 9092
14516c3a
TM		 9093 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
9094 return;
fc01cea9 9095
c6d01c6f 9096 trace_nfs4_sequence(clp, task->tk_status);
fc01cea9
AA		 9097 if (task->tk_status < 0) {
9098 dprintk("%s ERROR %d\n", __func__, task->tk_status);
212bf41d 9099 if (refcount_read(&clp->cl_count) == 1)
7135840f 9100 goto out;
fc01cea9 9101
aa5190d0
TM		 9102 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
9103 rpc_restart_call_prepare(task);
fc01cea9
AA		 9104 return;
9105 }
9106 }
fc01cea9 9107 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 9108out:
fc01cea9
AA		 9109 dprintk("<-- %s\n", __func__);
9110}
9111
9112static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
9113{
d5f8d3fe
TM		 9114 struct nfs4_sequence_data *calldata = data;
9115 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 9116 struct nfs4_sequence_args *args;
9117 struct nfs4_sequence_res *res;
9118
fc01cea9
AA		 9119 args = task->tk_msg.rpc_argp;
9120 res = task->tk_msg.rpc_resp;
9121
7981c8a6 9122 nfs4_setup_sequence(clp, args, res, task);
fc01cea9
AA		 9123}
9124
9125static const struct rpc_call_ops nfs41_sequence_ops = {
9126 .rpc_call_done = nfs41_sequence_call_done,
9127 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 9128 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 9129};
9130
8fe72bac 9131static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
a52458b4 9132 const struct cred *cred,
3be0f80b 9133 struct nfs4_slot *slot,
8fe72bac 9134 bool is_privileged)
fc01cea9 9135{
d5f8d3fe 9136 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 9137 struct rpc_message msg = {
9138 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
9139 .rpc_cred = cred,
9140 };
71ac6da9
TM		 9141 struct rpc_task_setup task_setup_data = {
9142 .rpc_client = clp->cl_rpcclient,
9143 .rpc_message = &msg,
8fe72bac 9144 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 9145 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 9146 };
3be0f80b 9147 struct rpc_task *ret;
fc01cea9 9148
3be0f80b 9149 ret = ERR_PTR(-EIO);
212bf41d 9150 if (!refcount_inc_not_zero(&clp->cl_count))
3be0f80b
TM		 9151 goto out_err;
9152
9153 ret = ERR_PTR(-ENOMEM);
dfb4f309 9154 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
3be0f80b
TM		 9155 if (calldata == NULL)
9156 goto out_put_clp;
fba83f34 9157 nfs4_init_sequence(&calldata->args, &calldata->res, 0, is_privileged);
3be0f80b 9158 nfs4_sequence_attach_slot(&calldata->args, &calldata->res, slot);
d5f8d3fe
TM		 9159 msg.rpc_argp = &calldata->args;
9160 msg.rpc_resp = &calldata->res;
9161 calldata->clp = clp;
71ac6da9 9162 task_setup_data.callback_data = calldata;
fc01cea9 9163
3be0f80b
TM		 9164 ret = rpc_run_task(&task_setup_data);
9165 if (IS_ERR(ret))
9166 goto out_err;
9167 return ret;
9168out_put_clp:
9169 nfs_put_client(clp);
9170out_err:
9171 nfs41_release_slot(slot);
9172 return ret;
71ac6da9
TM		 9173}
9174
a52458b4 9175static int nfs41_proc_async_sequence(struct nfs_client *clp, const struct cred *cred, unsigned renew_flags)
71ac6da9
TM		 9176{
9177 struct rpc_task *task;
9178 int ret = 0;
9179
2f60ea6b 9180 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
d1f456b0 9181 return -EAGAIN;
3be0f80b 9182 task = _nfs41_proc_sequence(clp, cred, NULL, false);
71ac6da9
TM		 9183 if (IS_ERR(task))
9184 ret = PTR_ERR(task);
9185 else
bf294b41 9186 rpc_put_task_async(task);
71ac6da9
TM		 9187 dprintk("<-- %s status=%d\n", __func__, ret);
9188 return ret;
9189}
9190
a52458b4 9191static int nfs4_proc_sequence(struct nfs_client *clp, const struct cred *cred)
71ac6da9
TM		 9192{
9193 struct rpc_task *task;
9194 int ret;
9195
3be0f80b 9196 task = _nfs41_proc_sequence(clp, cred, NULL, true);
71ac6da9
TM		 9197 if (IS_ERR(task)) {
9198 ret = PTR_ERR(task);
9199 goto out;
9200 }
9201 ret = rpc_wait_for_completion_task(task);
be824167 9202 if (!ret)
71ac6da9
TM		 9203 ret = task->tk_status;
9204 rpc_put_task(task);
9205out:
9206 dprintk("<-- %s status=%d\n", __func__, ret);
9207 return ret;
fc01cea9
AA		 9208}
9209
fce5c838
RL		 9210struct nfs4_reclaim_complete_data {
9211 struct nfs_client *clp;
9212 struct nfs41_reclaim_complete_args arg;
9213 struct nfs41_reclaim_complete_res res;
9214};
9215
9216static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
9217{
9218 struct nfs4_reclaim_complete_data *calldata = data;
9219
7981c8a6 9220 nfs4_setup_sequence(calldata->clp,
d9afbd1b
TM		 9221 &calldata->arg.seq_args,
9222 &calldata->res.seq_res,
9223 task);
fce5c838
RL		 9224}
9225
aa5190d0
TM		 9226static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
9227{
9228 switch(task->tk_status) {
9229 case 0:
57174593 9230 wake_up_all(&clp->cl_lock_waitq);
df561f66 9231 fallthrough;
aa5190d0
TM		 9232 case -NFS4ERR_COMPLETE_ALREADY:
9233 case -NFS4ERR_WRONG_CRED: /* What to do here? */
9234 break;
9235 case -NFS4ERR_DELAY:
aa5190d0 9236 rpc_delay(task, NFS4_POLL_RETRY_MAX);
df561f66 9237 fallthrough;
a8a4ae3a 9238 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0 9239 return -EAGAIN;
0048fdd0
TM		 9240 case -NFS4ERR_BADSESSION:
9241 case -NFS4ERR_DEADSESSION:
9242 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
0048fdd0 9243 break;
aa5190d0 9244 default:
0400a6b0 9245 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 9246 }
9247 return 0;
9248}
9249
fce5c838
RL		 9250static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
9251{
9252 struct nfs4_reclaim_complete_data *calldata = data;
9253 struct nfs_client *clp = calldata->clp;
9254 struct nfs4_sequence_res *res = &calldata->res.seq_res;
9255
9256 dprintk("--> %s\n", __func__);
14516c3a
TM		 9257 if (!nfs41_sequence_done(task, res))
9258 return;
fce5c838 9259
c6d01c6f 9260 trace_nfs4_reclaim_complete(clp, task->tk_status);
aa5190d0
TM		 9261 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
9262 rpc_restart_call_prepare(task);
9263 return;
9264 }
fce5c838
RL		 9265 dprintk("<-- %s\n", __func__);
9266}
9267
9268static void nfs4_free_reclaim_complete_data(void *data)
9269{
9270 struct nfs4_reclaim_complete_data *calldata = data;
9271
9272 kfree(calldata);
9273}
9274
9275static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
9276 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
9277 .rpc_call_done = nfs4_reclaim_complete_done,
9278 .rpc_release = nfs4_free_reclaim_complete_data,
9279};
9280
9281/*
9282 * Issue a global reclaim complete.
9283 */
965e9c23 9284static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
a52458b4 9285 const struct cred *cred)
fce5c838
RL		 9286{
9287 struct nfs4_reclaim_complete_data *calldata;
fce5c838
RL		 9288 struct rpc_message msg = {
9289 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 9290 .rpc_cred = cred,
fce5c838
RL		 9291 };
9292 struct rpc_task_setup task_setup_data = {
9293 .rpc_client = clp->cl_rpcclient,
9294 .rpc_message = &msg,
9295 .callback_ops = &nfs4_reclaim_complete_call_ops,
4c952e3d 9296 .flags = RPC_TASK_NO_ROUND_ROBIN,
fce5c838
RL		 9297 };
9298 int status = -ENOMEM;
9299
9300 dprintk("--> %s\n", __func__);
8535b2be 9301 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 9302 if (calldata == NULL)
9303 goto out;
9304 calldata->clp = clp;
9305 calldata->arg.one_fs = 0;
fce5c838 9306
fba83f34 9307 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0, 1);
fce5c838
RL		 9308 msg.rpc_argp = &calldata->arg;
9309 msg.rpc_resp = &calldata->res;
9310 task_setup_data.callback_data = calldata;
4c952e3d 9311 status = nfs4_call_sync_custom(&task_setup_data);
fce5c838
RL		 9312out:
9313 dprintk("<-- %s status=%d\n", __func__, status);
9314 return status;
9315}
b1f69b75
AA		 9316
9317static void
9318nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
9319{
9320 struct nfs4_layoutget *lgp = calldata;
c31663d4 9321 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
b1f69b75
AA		 9322
9323 dprintk("--> %s\n", __func__);
7981c8a6 9324 nfs4_setup_sequence(server->nfs_client, &lgp->args.seq_args,
183d9e7b
JL		 9325 &lgp->res.seq_res, task);
9326 dprintk("<-- %s\n", __func__);
b1f69b75
AA		 9327}
9328
9329static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
9330{
9331 struct nfs4_layoutget *lgp = calldata;
183d9e7b
JL		 9332
9333 dprintk("--> %s\n", __func__);
2e80dbe7 9334 nfs41_sequence_process(task, &lgp->res.seq_res);
183d9e7b
JL		 9335 dprintk("<-- %s\n", __func__);
9336}
9337
9338static int
9339nfs4_layoutget_handle_exception(struct rpc_task *task,
9340 struct nfs4_layoutget *lgp, struct nfs4_exception *exception)
9341{
ee314c2a
TM		 9342 struct inode *inode = lgp->args.inode;
9343 struct nfs_server *server = NFS_SERVER(inode);
9344 struct pnfs_layout_hdr *lo;
e85d7ee4
TM		 9345 int nfs4err = task->tk_status;
9346 int err, status = 0;
f7db0b28 9347 LIST_HEAD(head);
b1f69b75 9348
ed7e5423 9349 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
b1f69b75 9350
2dbf8dff
TM		 9351 nfs4_sequence_free_slot(&lgp->res.seq_res);
9352
e85d7ee4 9353 switch (nfs4err) {
b1f69b75 9354 case 0:
ee314c2a 9355 goto out;
7c1e6e58
PT		 9356
9357 /*
9358 * NFS4ERR_LAYOUTUNAVAILABLE means we are not supposed to use pnfs
9359 * on the file. set tk_status to -ENODATA to tell upper layer to
9360 * retry go inband.
9361 */
9362 case -NFS4ERR_LAYOUTUNAVAILABLE:
183d9e7b 9363 status = -ENODATA;
7c1e6e58 9364 goto out;
21b874c8
TM		 9365 /*
9366 * NFS4ERR_BADLAYOUT means the MDS cannot return a layout of
9367 * length lgp->args.minlength != 0 (see RFC5661 section 18.43.3).
9368 */
9369 case -NFS4ERR_BADLAYOUT:
183d9e7b
JL		 9370 status = -EOVERFLOW;
9371 goto out;
ed7e5423
BH		 9372 /*
9373 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
21b874c8
TM		 9374 * (or clients) writing to the same RAID stripe except when
9375 * the minlength argument is 0 (see RFC5661 section 18.43.3).
183d9e7b
JL		 9376 *
9377 * Treat it like we would RECALLCONFLICT -- we retry for a little
9378 * while, and then eventually give up.
ed7e5423 9379 */
b1f69b75 9380 case -NFS4ERR_LAYOUTTRYLATER:
183d9e7b
JL		 9381 if (lgp->args.minlength == 0) {
9382 status = -EOVERFLOW;
9383 goto out;
ed7e5423 9384 }
e85d7ee4
TM		 9385 status = -EBUSY;
9386 break;
183d9e7b 9387 case -NFS4ERR_RECALLCONFLICT:
183d9e7b 9388 status = -ERECALLCONFLICT;
e85d7ee4 9389 break;
26f47443
TM		 9390 case -NFS4ERR_DELEG_REVOKED:
9391 case -NFS4ERR_ADMIN_REVOKED:
ee314c2a
TM		 9392 case -NFS4ERR_EXPIRED:
9393 case -NFS4ERR_BAD_STATEID:
183d9e7b 9394 exception->timeout = 0;
ee314c2a 9395 spin_lock(&inode->i_lock);
f7db0b28
TM		 9396 lo = NFS_I(inode)->layout;
9397 /* If the open stateid was bad, then recover it. */
9398 if (!lo || test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) ||
e8fa33a6 9399 !nfs4_stateid_match_other(&lgp->args.stateid, &lo->plh_stateid)) {
ee314c2a 9400 spin_unlock(&inode->i_lock);
183d9e7b 9401 exception->state = lgp->args.ctx->state;
26f47443 9402 exception->stateid = &lgp->args.stateid;
2259f960
TM		 9403 break;
9404 }
f7db0b28
TM		 9405
9406 /*
9407 * Mark the bad layout state as invalid, then retry
9408 */
668f455d 9409 pnfs_mark_layout_stateid_invalid(lo, &head);
f7db0b28 9410 spin_unlock(&inode->i_lock);
1f18b82c 9411 nfs_commit_inode(inode, 0);
f7db0b28
TM		 9412 pnfs_free_lseg_list(&head);
9413 status = -EAGAIN;
9414 goto out;
b1f69b75 9415 }
183d9e7b 9416
e85d7ee4
TM		 9417 err = nfs4_handle_exception(server, nfs4err, exception);
9418 if (!status) {
9419 if (exception->retry)
9420 status = -EAGAIN;
9421 else
9422 status = err;
9423 }
ee314c2a 9424out:
b1f69b75 9425 dprintk("<-- %s\n", __func__);
183d9e7b 9426 return status;
b1f69b75
AA		 9427}
9428
dacb452d 9429size_t max_response_pages(struct nfs_server *server)
8554116e
IK		 9430{
9431 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
9432 return nfs_page_array_len(0, max_resp_sz);
9433}
9434
b1f69b75
AA		 9435static void nfs4_layoutget_release(void *calldata)
9436{
9437 struct nfs4_layoutget *lgp = calldata;
9438
9439 dprintk("--> %s\n", __func__);
bd171930 9440 nfs4_sequence_free_slot(&lgp->res.seq_res);
29a8bfe5 9441 pnfs_layoutget_free(lgp);
b1f69b75
AA		 9442 dprintk("<-- %s\n", __func__);
9443}
9444
9445static const struct rpc_call_ops nfs4_layoutget_call_ops = {
9446 .rpc_call_prepare = nfs4_layoutget_prepare,
9447 .rpc_call_done = nfs4_layoutget_done,
9448 .rpc_release = nfs4_layoutget_release,
9449};
9450
a0b0a6e3 9451struct pnfs_layout_segment *
dacb452d 9452nfs4_proc_layoutget(struct nfs4_layoutget *lgp, long *timeout)
b1f69b75 9453{
a47970ff
WAA		 9454 struct inode *inode = lgp->args.inode;
9455 struct nfs_server *server = NFS_SERVER(inode);
b1f69b75
AA		 9456 struct rpc_task *task;
9457 struct rpc_message msg = {
9458 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
9459 .rpc_argp = &lgp->args,
9460 .rpc_resp = &lgp->res,
6ab59344 9461 .rpc_cred = lgp->cred,
b1f69b75
AA		 9462 };
9463 struct rpc_task_setup task_setup_data = {
9464 .rpc_client = server->client,
9465 .rpc_message = &msg,
9466 .callback_ops = &nfs4_layoutget_call_ops,
9467 .callback_data = lgp,
63ec2b69 9468 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF,
b1f69b75 9469 };
a0b0a6e3 9470 struct pnfs_layout_segment *lseg = NULL;
bc23676c
TM		 9471 struct nfs4_exception exception = {
9472 .inode = inode,
9473 .timeout = *timeout,
9474 };
b1f69b75
AA		 9475 int status = 0;
9476
9477 dprintk("--> %s\n", __func__);
9478
4bd5a980
PT		 9479 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
9480 pnfs_get_layout_hdr(NFS_I(inode)->layout);
9481
fba83f34 9482 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0, 0);
a47970ff 9483
b1f69b75 9484 task = rpc_run_task(&task_setup_data);
6e47666e 9485
820bf85c 9486 status = rpc_wait_for_completion_task(task);
2dbf8dff
TM		 9487 if (status != 0)
9488 goto out;
9489
18c0778a 9490 if (task->tk_status < 0) {
183d9e7b
JL		 9491 status = nfs4_layoutget_handle_exception(task, lgp, &exception);
9492 *timeout = exception.timeout;
18c0778a
TM		 9493 } else if (lgp->res.layoutp->len == 0) {
9494 status = -EAGAIN;
9495 *timeout = nfs4_update_delay(&exception.timeout);
2dbf8dff
TM		 9496 } else
9497 lseg = pnfs_layout_process(lgp);
9498out:
1037e6ea
TM		 9499 trace_nfs4_layoutget(lgp->args.ctx,
9500 &lgp->args.range,
9501 &lgp->res.range,
48c9579a 9502 &lgp->res.stateid,
1037e6ea 9503 status);
183d9e7b 9504
b1f69b75
AA		 9505 rpc_put_task(task);
9506 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 9507 if (status)
9508 return ERR_PTR(status);
9509 return lseg;
b1f69b75
AA		 9510}
9511
cbe82603
BH		 9512static void
9513nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
9514{
9515 struct nfs4_layoutreturn *lrp = calldata;
9516
9517 dprintk("--> %s\n", __func__);
7981c8a6 9518 nfs4_setup_sequence(lrp->clp,
d9afbd1b
TM		 9519 &lrp->args.seq_args,
9520 &lrp->res.seq_res,
9521 task);
c8bf7073
TM		 9522 if (!pnfs_layout_is_valid(lrp->args.layout))
9523 rpc_exit(task, 0);
cbe82603
BH		 9524}
9525
9526static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
9527{
9528 struct nfs4_layoutreturn *lrp = calldata;
9529 struct nfs_server *server;
9530
9531 dprintk("--> %s\n", __func__);
9532
2e80dbe7 9533 if (!nfs41_sequence_process(task, &lrp->res.seq_res))
cbe82603
BH		 9534 return;
9535
6109bcf7
TM		 9536 /*
9537 * Was there an RPC level error? Assume the call succeeded,
9538 * and that we need to release the layout
9539 */
9540 if (task->tk_rpc_status != 0 && RPC_WAS_SENT(task)) {
9541 lrp->res.lrs_present = 0;
9542 return;
9543 }
9544
cbe82603 9545 server = NFS_SERVER(lrp->args.inode);
f22e5edd 9546 switch (task->tk_status) {
ff90514e 9547 case -NFS4ERR_OLD_STATEID:
30cb3ee2 9548 if (nfs4_layout_refresh_old_stateid(&lrp->args.stateid,
ecf84026 9549 &lrp->args.range,
ff90514e
TM		 9550 lrp->args.inode))
9551 goto out_restart;
df561f66 9552 fallthrough;
f22e5edd
TM		 9553 default:
9554 task->tk_status = 0;
df561f66 9555 fallthrough;
f22e5edd
TM		 9556 case 0:
9557 break;
9558 case -NFS4ERR_DELAY:
8478eaa1 9559 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
f22e5edd 9560 break;
ff90514e 9561 goto out_restart;
cbe82603 9562 }
cbe82603 9563 dprintk("<-- %s\n", __func__);
ff90514e
TM		 9564 return;
9565out_restart:
9566 task->tk_status = 0;
9567 nfs4_sequence_free_slot(&lrp->res.seq_res);
9568 rpc_restart_call_prepare(task);
cbe82603
BH		 9569}
9570
9571static void nfs4_layoutreturn_release(void *calldata)
9572{
9573 struct nfs4_layoutreturn *lrp = calldata;
849b286f 9574 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 9575
9576 dprintk("--> %s\n", __func__);
2a974425 9577 pnfs_layoutreturn_free_lsegs(lo, &lrp->args.stateid, &lrp->args.range,
68f74479 9578 lrp->res.lrs_present ? &lrp->res.stateid : NULL);
2e80dbe7 9579 nfs4_sequence_free_slot(&lrp->res.seq_res);
4d796d75
TM		 9580 if (lrp->ld_private.ops && lrp->ld_private.ops->free)
9581 lrp->ld_private.ops->free(&lrp->ld_private);
2f065ddb
TM		 9582 pnfs_put_layout_hdr(lrp->args.layout);
9583 nfs_iput_and_deactive(lrp->inode);
44ea8dfc 9584 put_cred(lrp->cred);
cbe82603
BH		 9585 kfree(calldata);
9586 dprintk("<-- %s\n", __func__);
9587}
9588
9589static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
9590 .rpc_call_prepare = nfs4_layoutreturn_prepare,
9591 .rpc_call_done = nfs4_layoutreturn_done,
9592 .rpc_release = nfs4_layoutreturn_release,
9593};
9594
6c16605d 9595int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync)
cbe82603
BH		 9596{
9597 struct rpc_task *task;
9598 struct rpc_message msg = {
9599 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
9600 .rpc_argp = &lrp->args,
9601 .rpc_resp = &lrp->res,
9556000d 9602 .rpc_cred = lrp->cred,
cbe82603
BH		 9603 };
9604 struct rpc_task_setup task_setup_data = {
1771c577 9605 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
cbe82603
BH		 9606 .rpc_message = &msg,
9607 .callback_ops = &nfs4_layoutreturn_call_ops,
9608 .callback_data = lrp,
9609 };
6c16605d 9610 int status = 0;
cbe82603 9611
99ade3c7
AE		 9612 nfs4_state_protect(NFS_SERVER(lrp->args.inode)->nfs_client,
9613 NFS_SP4_MACH_CRED_PNFS_CLEANUP,
9614 &task_setup_data.rpc_client, &msg);
9615
cbe82603 9616 dprintk("--> %s\n", __func__);
5a0ec8ac
TM		 9617 if (!sync) {
9618 lrp->inode = nfs_igrab_and_active(lrp->args.inode);
9619 if (!lrp->inode) {
9620 nfs4_layoutreturn_release(lrp);
9621 return -EAGAIN;
9622 }
9623 task_setup_data.flags |= RPC_TASK_ASYNC;
9624 }
fba83f34 9625 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1, 0);
cbe82603
BH		 9626 task = rpc_run_task(&task_setup_data);
9627 if (IS_ERR(task))
9628 return PTR_ERR(task);
5a0ec8ac
TM		 9629 if (sync)
9630 status = task->tk_status;
48c9579a 9631 trace_nfs4_layoutreturn(lrp->args.inode, &lrp->args.stateid, status);
cbe82603
BH		 9632 dprintk("<-- %s status=%d\n", __func__, status);
9633 rpc_put_task(task);
9634 return status;
9635}
9636
b1f69b75 9637static int
cd5875fe
TM		 9638_nfs4_proc_getdeviceinfo(struct nfs_server *server,
9639 struct pnfs_device *pdev,
a52458b4 9640 const struct cred *cred)
b1f69b75
AA		 9641{
9642 struct nfs4_getdeviceinfo_args args = {
9643 .pdev = pdev,
4e590803
TM		 9644 .notify_types = NOTIFY_DEVICEID4_CHANGE |
9645 NOTIFY_DEVICEID4_DELETE,
b1f69b75
AA		 9646 };
9647 struct nfs4_getdeviceinfo_res res = {
9648 .pdev = pdev,
9649 };
9650 struct rpc_message msg = {
9651 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
9652 .rpc_argp = &args,
9653 .rpc_resp = &res,
cd5875fe 9654 .rpc_cred = cred,
b1f69b75
AA		 9655 };
9656 int status;
9657
9658 dprintk("--> %s\n", __func__);
7c513058 9659 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4e590803
TM		 9660 if (res.notification & ~args.notify_types)
9661 dprintk("%s: unsupported notification\n", __func__);
df52699e
TM		 9662 if (res.notification != args.notify_types)
9663 pdev->nocache = 1;
4e590803 9664
cac1d3a2
TM		 9665 trace_nfs4_getdeviceinfo(server, &pdev->dev_id, status);
9666
b1f69b75
AA		 9667 dprintk("<-- %s status=%d\n", __func__, status);
9668
9669 return status;
9670}
9671
cd5875fe
TM		 9672int nfs4_proc_getdeviceinfo(struct nfs_server *server,
9673 struct pnfs_device *pdev,
a52458b4 9674 const struct cred *cred)
b1f69b75
AA		 9675{
9676 struct nfs4_exception exception = { };
9677 int err;
9678
9679 do {
9680 err = nfs4_handle_exception(server,
cd5875fe 9681 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 9682 &exception);
9683 } while (exception.retry);
9684 return err;
9685}
9686EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
9687
863a3c6c
AA		 9688static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
9689{
9690 struct nfs4_layoutcommit_data *data = calldata;
9691 struct nfs_server *server = NFS_SERVER(data->args.inode);
9692
7981c8a6 9693 nfs4_setup_sequence(server->nfs_client,
d9afbd1b
TM		 9694 &data->args.seq_args,
9695 &data->res.seq_res,
9696 task);
863a3c6c
AA		 9697}
9698
9699static void
9700nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
9701{
9702 struct nfs4_layoutcommit_data *data = calldata;
9703 struct nfs_server *server = NFS_SERVER(data->args.inode);
9704
6ba7db34 9705 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 9706 return;
9707
9708 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 9709 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
9710 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
9711 case -NFS4ERR_BADLAYOUT: /* no layout */
9712 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 9713 task->tk_status = 0;
e59d27e0 9714 case 0:
e59d27e0
TM		 9715 break;
9716 default:
8478eaa1 9717 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) {
e59d27e0
TM		 9718 rpc_restart_call_prepare(task);
9719 return;
9720 }
9721 }
863a3c6c
AA		 9722}
9723
9724static void nfs4_layoutcommit_release(void *calldata)
9725{
9726 struct nfs4_layoutcommit_data *data = calldata;
9727
db29c089 9728 pnfs_cleanup_layoutcommit(data);
d8c951c3
TM		 9729 nfs_post_op_update_inode_force_wcc(data->args.inode,
9730 data->res.fattr);
a52458b4 9731 put_cred(data->cred);
472e2594 9732 nfs_iput_and_deactive(data->inode);
863a3c6c
AA		 9733 kfree(data);
9734}
9735
9736static const struct rpc_call_ops nfs4_layoutcommit_ops = {
9737 .rpc_call_prepare = nfs4_layoutcommit_prepare,
9738 .rpc_call_done = nfs4_layoutcommit_done,
9739 .rpc_release = nfs4_layoutcommit_release,
9740};
9741
9742int
ef311537 9743nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 9744{
9745 struct rpc_message msg = {
9746 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
9747 .rpc_argp = &data->args,
9748 .rpc_resp = &data->res,
9749 .rpc_cred = data->cred,
9750 };
9751 struct rpc_task_setup task_setup_data = {
9752 .task = &data->task,
9753 .rpc_client = NFS_CLIENT(data->args.inode),
9754 .rpc_message = &msg,
9755 .callback_ops = &nfs4_layoutcommit_ops,
9756 .callback_data = data,
863a3c6c
AA		 9757 };
9758 struct rpc_task *task;
9759 int status = 0;
9760
b4839ebe
KM		 9761 dprintk("NFS: initiating layoutcommit call. sync %d "
9762 "lbw: %llu inode %lu\n", sync,
863a3c6c
AA		 9763 data->args.lastbytewritten,
9764 data->args.inode->i_ino);
9765
472e2594
TM		 9766 if (!sync) {
9767 data->inode = nfs_igrab_and_active(data->args.inode);
9768 if (data->inode == NULL) {
9769 nfs4_layoutcommit_release(data);
9770 return -EAGAIN;
9771 }
9772 task_setup_data.flags = RPC_TASK_ASYNC;
9773 }
fba83f34 9774 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 0);
863a3c6c
AA		 9775 task = rpc_run_task(&task_setup_data);
9776 if (IS_ERR(task))
9777 return PTR_ERR(task);
472e2594
TM		 9778 if (sync)
9779 status = task->tk_status;
48c9579a 9780 trace_nfs4_layoutcommit(data->args.inode, &data->args.stateid, status);
863a3c6c
AA		 9781 dprintk("%s: status %d\n", __func__, status);
9782 rpc_put_task(task);
9783 return status;
9784}
fca78d6d 9785
302fad7b 9786/*
97431204
AA		 9787 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
9788 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
9789 */
fca78d6d
BS		 9790static int
9791_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
b1b3e136
WAA		 9792 struct nfs_fsinfo *info,
9793 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
fca78d6d
BS		 9794{
9795 struct nfs41_secinfo_no_name_args args = {
9796 .style = SECINFO_STYLE_CURRENT_FH,
9797 };
9798 struct nfs4_secinfo_res res = {
9799 .flavors = flavors,
9800 };
9801 struct rpc_message msg = {
9802 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
9803 .rpc_argp = &args,
9804 .rpc_resp = &res,
9805 };
cc15e24a
AS		 9806 struct nfs4_call_sync_data data = {
9807 .seq_server = server,
9808 .seq_args = &args.seq_args,
9809 .seq_res = &res.seq_res,
9810 };
9811 struct rpc_task_setup task_setup = {
9812 .rpc_client = server->client,
9813 .rpc_message = &msg,
9814 .callback_ops = server->nfs_client->cl_mvops->call_sync_ops,
9815 .callback_data = &data,
9816 .flags = RPC_TASK_NO_ROUND_ROBIN,
9817 };
a52458b4 9818 const struct cred *cred = NULL;
b1b3e136
WAA		 9819 int status;
9820
9821 if (use_integrity) {
48bb6ec1 9822 task_setup.rpc_client = server->nfs_client->cl_rpcclient;
cc15e24a 9823
7cb852df
WAA		 9824 cred = nfs4_get_clid_cred(server->nfs_client);
9825 msg.rpc_cred = cred;
b1b3e136
WAA		 9826 }
9827
9828 dprintk("--> %s\n", __func__);
cc15e24a
AS		 9829 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0);
9830 status = nfs4_call_sync_custom(&task_setup);
b1b3e136
WAA		 9831 dprintk("<-- %s status=%d\n", __func__, status);
9832
a52458b4 9833 put_cred(cred);
b1b3e136
WAA		 9834
9835 return status;
fca78d6d
BS		 9836}
9837
9838static int
9839nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
9840 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
9841{
0688e64b
TM		 9842 struct nfs4_exception exception = {
9843 .interruptible = true,
9844 };
fca78d6d
BS		 9845 int err;
9846 do {
b1b3e136
WAA		 9847 /* first try using integrity protection */
9848 err = -NFS4ERR_WRONGSEC;
9849
9850 /* try to use integrity protection with machine cred */
9851 if (_nfs4_is_integrity_protected(server->nfs_client))
9852 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
9853 flavors, true);
9854
9855 /*
9856 * if unable to use integrity protection, or SECINFO with
9857 * integrity protection returns NFS4ERR_WRONGSEC (which is
9858 * disallowed by spec, but exists in deployed servers) use
9859 * the current filesystem's rpc_client and the user cred.
9860 */
9861 if (err == -NFS4ERR_WRONGSEC)
9862 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
9863 flavors, false);
9864
fca78d6d
BS		 9865 switch (err) {
9866 case 0:
9867 case -NFS4ERR_WRONGSEC:
78b19bae 9868 case -ENOTSUPP:
05e9cfb4 9869 goto out;
fca78d6d
BS		 9870 default:
9871 err = nfs4_handle_exception(server, err, &exception);
9872 }
9873 } while (exception.retry);
05e9cfb4 9874out:
fca78d6d
BS		 9875 return err;
9876}
9877
9878static int
9879nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
9880 struct nfs_fsinfo *info)
9881{
9882 int err;
9883 struct page *page;
367156d9 9884 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
fca78d6d 9885 struct nfs4_secinfo_flavors *flavors;
58a8cf12
WAA		 9886 struct nfs4_secinfo4 *secinfo;
9887 int i;
fca78d6d
BS		 9888
9889 page = alloc_page(GFP_KERNEL);
9890 if (!page) {
9891 err = -ENOMEM;
9892 goto out;
9893 }
9894
9895 flavors = page_address(page);
9896 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
9897
9898 /*
9899 * Fall back on "guess and check" method if
9900 * the server doesn't support SECINFO_NO_NAME
9901 */
78b19bae 9902 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
fca78d6d
BS		 9903 err = nfs4_find_root_sec(server, fhandle, info);
9904 goto out_freepage;
9905 }
9906 if (err)
9907 goto out_freepage;
9908
58a8cf12
WAA		 9909 for (i = 0; i < flavors->num_flavors; i++) {
9910 secinfo = &flavors->flavors[i];
9911
9912 switch (secinfo->flavor) {
9913 case RPC_AUTH_NULL:
9914 case RPC_AUTH_UNIX:
9915 case RPC_AUTH_GSS:
9916 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
9917 &secinfo->flavor_info);
9918 break;
9919 default:
9920 flavor = RPC_AUTH_MAXFLAVOR;
9921 break;
9922 }
9923
4d4b69dd
WAA		 9924 if (!nfs_auth_info_match(&server->auth_info, flavor))
9925 flavor = RPC_AUTH_MAXFLAVOR;
9926
58a8cf12
WAA		 9927 if (flavor != RPC_AUTH_MAXFLAVOR) {
9928 err = nfs4_lookup_root_sec(server, fhandle,
9929 info, flavor);
9930 if (!err)
9931 break;
9932 }
9933 }
9934
9935 if (flavor == RPC_AUTH_MAXFLAVOR)
9936 err = -EPERM;
fca78d6d
BS		 9937
9938out_freepage:
9939 put_page(page);
9940 if (err == -EACCES)
9941 return -EPERM;
9942out:
9943 return err;
9944}
1cab0652 9945
ab7cb0df
TM		 9946static int _nfs41_test_stateid(struct nfs_server *server,
9947 nfs4_stateid *stateid,
a52458b4 9948 const struct cred *cred)
7d974794
BS		 9949{
9950 int status;
9951 struct nfs41_test_stateid_args args = {
1cab0652 9952 .stateid = stateid,
7d974794
BS		 9953 };
9954 struct nfs41_test_stateid_res res;
9955 struct rpc_message msg = {
9956 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
9957 .rpc_argp = &args,
9958 .rpc_resp = &res,
ab7cb0df 9959 .rpc_cred = cred,
7d974794 9960 };
3787d506
WAA		 9961 struct rpc_clnt *rpc_client = server->client;
9962
9963 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
9964 &rpc_client, &msg);
1cab0652 9965
38527b15 9966 dprintk("NFS call test_stateid %p\n", stateid);
fba83f34 9967 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1);
3787d506 9968 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8fe72bac 9969 &args.seq_args, &res.seq_res);
38527b15
CL		 9970 if (status != NFS_OK) {
9971 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 9972 return status;
38527b15
CL		 9973 }
9974 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 9975 return -res.status;
7d974794
BS		 9976}
9977
43912bbb
TM		 9978static void nfs4_handle_delay_or_session_error(struct nfs_server *server,
9979 int err, struct nfs4_exception *exception)
9980{
9981 exception->retry = 0;
9982 switch(err) {
9983 case -NFS4ERR_DELAY:
76e8a1bd 9984 case -NFS4ERR_RETRY_UNCACHED_REP:
43912bbb
TM		 9985 nfs4_handle_exception(server, err, exception);
9986 break;
9987 case -NFS4ERR_BADSESSION:
9988 case -NFS4ERR_BADSLOT:
9989 case -NFS4ERR_BAD_HIGH_SLOT:
9990 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
9991 case -NFS4ERR_DEADSESSION:
9992 nfs4_do_handle_exception(server, err, exception);
9993 }
9994}
9995
38527b15
CL		 9996/**
9997 * nfs41_test_stateid - perform a TEST_STATEID operation
9998 *
9999 * @server: server / transport on which to perform the operation
10000 * @stateid: state ID to test
ab7cb0df 10001 * @cred: credential
38527b15
CL		 10002 *
10003 * Returns NFS_OK if the server recognizes that "stateid" is valid.
10004 * Otherwise a negative NFS4ERR value is returned if the operation
10005 * failed or the state ID is not currently valid.
10006 */
ab7cb0df
TM		 10007static int nfs41_test_stateid(struct nfs_server *server,
10008 nfs4_stateid *stateid,
a52458b4 10009 const struct cred *cred)
7d974794 10010{
0688e64b
TM		 10011 struct nfs4_exception exception = {
10012 .interruptible = true,
10013 };
7d974794
BS		 10014 int err;
10015 do {
ab7cb0df 10016 err = _nfs41_test_stateid(server, stateid, cred);
43912bbb 10017 nfs4_handle_delay_or_session_error(server, err, &exception);
7d974794
BS		 10018 } while (exception.retry);
10019 return err;
10020}
9aeda35f 10021
7c1d5fae
TM		 10022struct nfs_free_stateid_data {
10023 struct nfs_server *server;
10024 struct nfs41_free_stateid_args args;
9aeda35f 10025 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 10026};
10027
10028static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
10029{
10030 struct nfs_free_stateid_data *data = calldata;
7981c8a6 10031 nfs4_setup_sequence(data->server->nfs_client,
7c1d5fae
TM		 10032 &data->args.seq_args,
10033 &data->res.seq_res,
10034 task);
10035}
10036
10037static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
10038{
10039 struct nfs_free_stateid_data *data = calldata;
10040
10041 nfs41_sequence_done(task, &data->res.seq_res);
10042
10043 switch (task->tk_status) {
10044 case -NFS4ERR_DELAY:
8478eaa1 10045 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN)
7c1d5fae
TM		 10046 rpc_restart_call_prepare(task);
10047 }
10048}
10049
10050static void nfs41_free_stateid_release(void *calldata)
10051{
10052 kfree(calldata);
10053}
10054
17f26b12 10055static const struct rpc_call_ops nfs41_free_stateid_ops = {
7c1d5fae
TM		 10056 .rpc_call_prepare = nfs41_free_stateid_prepare,
10057 .rpc_call_done = nfs41_free_stateid_done,
10058 .rpc_release = nfs41_free_stateid_release,
10059};
10060
2f261020
AS		 10061/**
10062 * nfs41_free_stateid - perform a FREE_STATEID operation
10063 *
10064 * @server: server / transport on which to perform the operation
10065 * @stateid: state ID to release
10066 * @cred: credential
302fad7b 10067 * @privileged: set to true if this call needs to be privileged
2f261020
AS		 10068 *
10069 * Note: this function is always asynchronous.
10070 */
10071static int nfs41_free_stateid(struct nfs_server *server,
f0b0bf88 10072 const nfs4_stateid *stateid,
a52458b4 10073 const struct cred *cred,
7c1d5fae
TM		 10074 bool privileged)
10075{
9aeda35f
BS		 10076 struct rpc_message msg = {
10077 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 10078 .rpc_cred = cred,
9aeda35f 10079 };
7c1d5fae
TM		 10080 struct rpc_task_setup task_setup = {
10081 .rpc_client = server->client,
10082 .rpc_message = &msg,
10083 .callback_ops = &nfs41_free_stateid_ops,
10084 .flags = RPC_TASK_ASYNC,
10085 };
10086 struct nfs_free_stateid_data *data;
2f261020 10087 struct rpc_task *task;
9aeda35f 10088
3787d506
WAA		 10089 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
10090 &task_setup.rpc_client, &msg);
10091
38527b15 10092 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 10093 data = kmalloc(sizeof(*data), GFP_NOFS);
10094 if (!data)
2f261020 10095 return -ENOMEM;
7c1d5fae
TM		 10096 data->server = server;
10097 nfs4_stateid_copy(&data->args.stateid, stateid);
10098
10099 task_setup.callback_data = data;
10100
10101 msg.rpc_argp = &data->args;
10102 msg.rpc_resp = &data->res;
fba83f34 10103 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, privileged);
2f261020 10104 task = rpc_run_task(&task_setup);
7c1d5fae
TM		 10105 if (IS_ERR(task))
10106 return PTR_ERR(task);
7c1d5fae 10107 rpc_put_task(task);
f0b0bf88 10108 return 0;
9aeda35f 10109}
36281caa 10110
f1cdae87
JL		 10111static void
10112nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
c8b2d0bf 10113{
a52458b4 10114 const struct cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 10115
f0b0bf88 10116 nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf 10117 nfs4_free_lock_state(server, lsp);
c8b2d0bf
TM		 10118}
10119
36281caa
TM		 10120static bool nfs41_match_stateid(const nfs4_stateid *s1,
10121 const nfs4_stateid *s2)
10122{
93b717fd
TM		 10123 if (s1->type != s2->type)
10124 return false;
10125
2d2f24ad 10126 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 10127 return false;
10128
2d2f24ad 10129 if (s1->seqid == s2->seqid)
36281caa 10130 return true;
36281caa 10131
045c5519 10132 return s1->seqid == 0 || s2->seqid == 0;
36281caa
TM		 10133}
10134
557134a3
AA		 10135#endif /* CONFIG_NFS_V4_1 */
10136
36281caa
TM		 10137static bool nfs4_match_stateid(const nfs4_stateid *s1,
10138 const nfs4_stateid *s2)
10139{
f597c537 10140 return nfs4_stateid_match(s1, s2);
36281caa
TM		 10141}
10142
10143
17280175 10144static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 10145 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 10146 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 10147 .recover_open = nfs4_open_reclaim,
10148 .recover_lock = nfs4_lock_reclaim,
591d71cb 10149 .establish_clid = nfs4_init_clientid,
05f4c350 10150 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 10151};
10152
591d71cb 10153#if defined(CONFIG_NFS_V4_1)
17280175 10154static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 10155 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
10156 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
10157 .recover_open = nfs4_open_reclaim,
10158 .recover_lock = nfs4_lock_reclaim,
4d643d1d 10159 .establish_clid = nfs41_init_clientid,
fce5c838 10160 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 10161 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 10162};
10163#endif /* CONFIG_NFS_V4_1 */
10164
17280175 10165static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 10166 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
10167 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
4dfd4f7a 10168 .recover_open = nfs40_open_expired,
591d71cb
AA		 10169 .recover_lock = nfs4_lock_expired,
10170 .establish_clid = nfs4_init_clientid,
10171};
10172
10173#if defined(CONFIG_NFS_V4_1)
17280175 10174static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 10175 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 10176 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 10177 .recover_open = nfs41_open_expired,
10178 .recover_lock = nfs41_lock_expired,
4d643d1d 10179 .establish_clid = nfs41_init_clientid,
1da177e4 10180};
591d71cb 10181#endif /* CONFIG_NFS_V4_1 */
1da177e4 10182
17280175 10183static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 10184 .sched_state_renewal = nfs4_proc_async_renew,
f15e1e8b 10185 .get_state_renewal_cred = nfs4_get_renew_cred,
8e69514f 10186 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 10187};
10188
10189#if defined(CONFIG_NFS_V4_1)
17280175 10190static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 10191 .sched_state_renewal = nfs41_proc_async_sequence,
f15e1e8b 10192 .get_state_renewal_cred = nfs4_get_machine_cred,
8e69514f 10193 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 10194};
10195#endif
10196
ec011fe8 10197static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
b03d735b 10198 .get_locations = _nfs40_proc_get_locations,
44c99933 10199 .fsid_present = _nfs40_proc_fsid_present,
ec011fe8
CL		 10200};
10201
10202#if defined(CONFIG_NFS_V4_1)
10203static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
b03d735b 10204 .get_locations = _nfs41_proc_get_locations,
44c99933 10205 .fsid_present = _nfs41_proc_fsid_present,
ec011fe8
CL		 10206};
10207#endif /* CONFIG_NFS_V4_1 */
10208
97dc1359
TM		 10209static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
10210 .minor_version = 0,
39c6daae
TM		 10211 .init_caps = NFS_CAP_READDIRPLUS
10212 | NFS_CAP_ATOMIC_OPEN
39c6daae 10213 | NFS_CAP_POSIX_LOCK,
abf79bb3
CL		 10214 .init_client = nfs40_init_client,
10215 .shutdown_client = nfs40_shutdown_client,
36281caa 10216 .match_stateid = nfs4_match_stateid,
fca78d6d 10217 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 10218 .free_lock_state = nfs4_release_lockowner,
45870d69 10219 .test_and_free_expired = nfs40_test_and_free_expired_stateid,
63f5f796 10220 .alloc_seqid = nfs_alloc_seqid,
9915ea7e 10221 .call_sync_ops = &nfs40_call_sync_ops,
c48f4f35
TM		 10222 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
10223 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
10224 .state_renewal_ops = &nfs40_state_renewal_ops,
ec011fe8 10225 .mig_recovery_ops = &nfs40_mig_recovery_ops,
97dc1359
TM		 10226};
10227
10228#if defined(CONFIG_NFS_V4_1)
63f5f796
TM		 10229static struct nfs_seqid *
10230nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2)
10231{
10232 return NULL;
10233}
10234
97dc1359
TM		 10235static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
10236 .minor_version = 1,
39c6daae
TM		 10237 .init_caps = NFS_CAP_READDIRPLUS
10238 | NFS_CAP_ATOMIC_OPEN
3b66486c 10239 | NFS_CAP_POSIX_LOCK
49f9a0fa 10240 | NFS_CAP_STATEID_NFSV41
6e01260c
FI		 10241 | NFS_CAP_ATOMIC_OPEN_V1
10242 | NFS_CAP_LGOPEN,
abf79bb3
CL		 10243 .init_client = nfs41_init_client,
10244 .shutdown_client = nfs41_shutdown_client,
36281caa 10245 .match_stateid = nfs41_match_stateid,
fca78d6d 10246 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 10247 .free_lock_state = nfs41_free_lock_state,
45870d69 10248 .test_and_free_expired = nfs41_test_and_free_expired_stateid,
63f5f796 10249 .alloc_seqid = nfs_alloc_no_seqid,
04fa2c6b 10250 .session_trunk = nfs4_test_session_trunk,
9915ea7e 10251 .call_sync_ops = &nfs41_call_sync_ops,
c48f4f35
TM		 10252 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
10253 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
10254 .state_renewal_ops = &nfs41_state_renewal_ops,
ec011fe8 10255 .mig_recovery_ops = &nfs41_mig_recovery_ops,
97dc1359
TM		 10256};
10257#endif
10258
42c2c424
SD		 10259#if defined(CONFIG_NFS_V4_2)
10260static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
10261 .minor_version = 2,
7017310a
BS		 10262 .init_caps = NFS_CAP_READDIRPLUS
10263 | NFS_CAP_ATOMIC_OPEN
7017310a
BS		 10264 | NFS_CAP_POSIX_LOCK
10265 | NFS_CAP_STATEID_NFSV41
e983120e 10266 | NFS_CAP_ATOMIC_OPEN_V1
6e01260c 10267 | NFS_CAP_LGOPEN
f4ac1674 10268 | NFS_CAP_ALLOCATE
2e72448b 10269 | NFS_CAP_COPY
cb95deea 10270 | NFS_CAP_OFFLOAD_CANCEL
0491567b 10271 | NFS_CAP_COPY_NOTIFY
624bd5b7 10272 | NFS_CAP_DEALLOCATE
6c5a0d89 10273 | NFS_CAP_SEEK
e5341f3a 10274 | NFS_CAP_LAYOUTSTATS
3eb86093 10275 | NFS_CAP_CLONE
c5675526
AS		 10276 | NFS_CAP_LAYOUTERROR
10277 | NFS_CAP_READ_PLUS,
abf79bb3
CL		 10278 .init_client = nfs41_init_client,
10279 .shutdown_client = nfs41_shutdown_client,
42c2c424
SD		 10280 .match_stateid = nfs41_match_stateid,
10281 .find_root_sec = nfs41_find_root_sec,
7017310a 10282 .free_lock_state = nfs41_free_lock_state,
9915ea7e 10283 .call_sync_ops = &nfs41_call_sync_ops,
45870d69 10284 .test_and_free_expired = nfs41_test_and_free_expired_stateid,
63f5f796 10285 .alloc_seqid = nfs_alloc_no_seqid,
04fa2c6b 10286 .session_trunk = nfs4_test_session_trunk,
42c2c424
SD		 10287 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
10288 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
10289 .state_renewal_ops = &nfs41_state_renewal_ops,
18e3b739 10290 .mig_recovery_ops = &nfs41_mig_recovery_ops,
42c2c424
SD		 10291};
10292#endif
10293
97dc1359
TM		 10294const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
10295 [0] = &nfs_v4_0_minor_ops,
10296#if defined(CONFIG_NFS_V4_1)
10297 [1] = &nfs_v4_1_minor_ops,
10298#endif
42c2c424
SD		 10299#if defined(CONFIG_NFS_V4_2)
10300 [2] = &nfs_v4_2_minor_ops,
10301#endif
97dc1359
TM		 10302};
10303
13997823 10304static ssize_t nfs4_listxattr(struct dentry *dentry, char *list, size_t size)
c4803c49 10305{
012a211a 10306 ssize_t error, error2, error3;
c4803c49
AG		 10307
10308 error = generic_listxattr(dentry, list, size);
10309 if (error < 0)
10310 return error;
10311 if (list) {
10312 list += error;
10313 size -= error;
10314 }
10315
10316 error2 = nfs4_listxattr_nfs4_label(d_inode(dentry), list, size);
10317 if (error2 < 0)
10318 return error2;
012a211a
FL		 10319
10320 if (list) {
10321 list += error2;
10322 size -= error2;
10323 }
10324
10325 error3 = nfs4_listxattr_nfs4_user(d_inode(dentry), list, size);
10326 if (error3 < 0)
10327 return error3;
10328
10329 return error + error2 + error3;
c4803c49
AG		 10330}
10331
17f26b12 10332static const struct inode_operations nfs4_dir_inode_operations = {
73a79706
BS		 10333 .create = nfs_create,
10334 .lookup = nfs_lookup,
10335 .atomic_open = nfs_atomic_open,
10336 .link = nfs_link,
10337 .unlink = nfs_unlink,
10338 .symlink = nfs_symlink,
10339 .mkdir = nfs_mkdir,
10340 .rmdir = nfs_rmdir,
10341 .mknod = nfs_mknod,
10342 .rename = nfs_rename,
10343 .permission = nfs_permission,
10344 .getattr = nfs_getattr,
10345 .setattr = nfs_setattr,
c4803c49 10346 .listxattr = nfs4_listxattr,
73a79706
BS		 10347};
10348
92e1d5be 10349static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 10350 .permission = nfs_permission,
10351 .getattr = nfs_getattr,
10352 .setattr = nfs_setattr,
c4803c49 10353 .listxattr = nfs4_listxattr,
6b3b5496
BF		 10354};
10355
509de811 10356const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 10357 .version = 4, /* protocol version */
10358 .dentry_ops = &nfs4_dentry_operations,
10359 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 10360 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 10361 .file_ops = &nfs4_file_operations,
1da177e4 10362 .getroot = nfs4_proc_get_root,
281cad46 10363 .submount = nfs4_submount,
f2aedb71 10364 .try_get_tree = nfs4_try_get_tree,
1da177e4
LT		 10365 .getattr = nfs4_proc_getattr,
10366 .setattr = nfs4_proc_setattr,
10367 .lookup = nfs4_proc_lookup,
5b5faaf6 10368 .lookupp = nfs4_proc_lookupp,
1da177e4
LT		 10369 .access = nfs4_proc_access,
10370 .readlink = nfs4_proc_readlink,
1da177e4
LT		 10371 .create = nfs4_proc_create,
10372 .remove = nfs4_proc_remove,
10373 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 10374 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4 10375 .unlink_done = nfs4_proc_unlink_done,
d3d4152a 10376 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 10377 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 10378 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 10379 .link = nfs4_proc_link,
10380 .symlink = nfs4_proc_symlink,
10381 .mkdir = nfs4_proc_mkdir,
912678db 10382 .rmdir = nfs4_proc_rmdir,
1da177e4
LT		 10383 .readdir = nfs4_proc_readdir,
10384 .mknod = nfs4_proc_mknod,
10385 .statfs = nfs4_proc_statfs,
10386 .fsinfo = nfs4_proc_fsinfo,
10387 .pathconf = nfs4_proc_pathconf,
e9326dca 10388 .set_capabilities = nfs4_server_capabilities,
1da177e4 10389 .decode_dirent = nfs4_decode_dirent,
a4cdda59 10390 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
1da177e4 10391 .read_setup = nfs4_proc_read_setup,
ec06c096 10392 .read_done = nfs4_read_done,
1da177e4 10393 .write_setup = nfs4_proc_write_setup,
788e7a89 10394 .write_done = nfs4_write_done,
1da177e4 10395 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 10396 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 10397 .commit_done = nfs4_commit_done,
1da177e4 10398 .lock = nfs4_proc_lock,
e50a1c2e 10399 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 10400 .close_context = nfs4_close_context,
2b484297 10401 .open_context = nfs4_atomic_open,
011e2a7f 10402 .have_delegation = nfs4_have_delegation,
6663ee7f 10403 .alloc_client = nfs4_alloc_client,
45a52a02 10404 .init_client = nfs4_init_client,
cdb7eced 10405 .free_client = nfs4_free_client,
1179acc6
BS		 10406 .create_server = nfs4_create_server,
10407 .clone_server = nfs_clone_server,
1da177e4
LT		 10408};
10409
64c2ce8b 10410static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
98e9cb57 10411 .name = XATTR_NAME_NFSV4_ACL,
64c2ce8b
AK		 10412 .list = nfs4_xattr_list_nfs4_acl,
10413 .get = nfs4_xattr_get_nfs4_acl,
10414 .set = nfs4_xattr_set_nfs4_acl,
10415};
10416
012a211a
FL		 10417#ifdef CONFIG_NFS_V4_2
10418static const struct xattr_handler nfs4_xattr_nfs4_user_handler = {
10419 .prefix = XATTR_USER_PREFIX,
10420 .get = nfs4_xattr_get_nfs4_user,
10421 .set = nfs4_xattr_set_nfs4_user,
10422};
10423#endif
10424
64c2ce8b
AK		 10425const struct xattr_handler *nfs4_xattr_handlers[] = {
10426 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 10427#ifdef CONFIG_NFS_V4_SECURITY_LABEL
10428 &nfs4_xattr_nfs4_label_handler,
012a211a
FL		 10429#endif
10430#ifdef CONFIG_NFS_V4_2
10431 &nfs4_xattr_nfs4_user_handler,
c9bccef6 10432#endif
64c2ce8b
AK		 10433 NULL
10434};
10435
1da177e4
LT		 10436/*
10437 * Local variables:
10438 * c-basic-offset: 8
10439 * End:
10440 */
Linux 6.x block layer and io_uring tree(s)