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UBUNTU: Ubuntu-5.15.0-39.42
[mirror_ubuntu-jammy-kernel.git] / fs / nfs / nfs4proc.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
1da177e4
LT		 39#include <linux/delay.h>
40#include <linux/errno.h>
41#include <linux/string.h>
652f89f6
TM		 42#include <linux/ratelimit.h>
43#include <linux/printk.h>
5a0e3ad6 44#include <linux/slab.h>
1da177e4
LT		 45#include <linux/sunrpc/clnt.h>
46#include <linux/nfs.h>
47#include <linux/nfs4.h>
48#include <linux/nfs_fs.h>
49#include <linux/nfs_page.h>
9b7160c5 50#include <linux/nfs_mount.h>
1da177e4 51#include <linux/namei.h>
02a913a7 52#include <linux/mount.h>
99fe60d0 53#include <linux/module.h>
64c2ce8b 54#include <linux/xattr.h>
c7a360b0 55#include <linux/utsname.h>
d310310c 56#include <linux/freezer.h>
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
1da177e4
LT		 74#define NFSDBG_FACILITY NFSDBG_PROC
75
30846df0
TM		 76#define NFS4_BITMASK_SZ 3
77
2066fe89 78#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 79#define NFS4_POLL_RETRY_MAX (15*HZ)
80
a1d1c4f1
TM		 81/* file attributes which can be mapped to nfs attributes */
82#define NFS4_VALID_ATTRS (ATTR_MODE \
83 | ATTR_UID \
84 | ATTR_GID \
85 | ATTR_SIZE \
86 | ATTR_ATIME \
87 | ATTR_MTIME \
88 | ATTR_CTIME \
89 | ATTR_ATIME_SET \
90 | ATTR_MTIME_SET)
91
cdd4e68b 92struct nfs4_opendata;
b257957e 93static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 94static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
81934ddb 95static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
a841b54d 96static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label, struct inode *inode);
a52458b4 97static int nfs4_do_setattr(struct inode *inode, const struct cred *cred,
0ab64e0e 98 struct nfs_fattr *fattr, struct iattr *sattr,
29b59f94 99 struct nfs_open_context *ctx, struct nfs4_label *ilabel,
1775fd3e 100 struct nfs4_label *olabel);
f062eb6c 101#ifdef CONFIG_NFS_V4_1
3be0f80b 102static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
a52458b4 103 const struct cred *cred,
3be0f80b
TM		 104 struct nfs4_slot *slot,
105 bool is_privileged);
ab7cb0df 106static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *,
a52458b4 107 const struct cred *);
f0b0bf88 108static int nfs41_free_stateid(struct nfs_server *, const nfs4_stateid *,
a52458b4 109 const struct cred *, bool);
f062eb6c 110#endif
332d1a03
TM		 111static void nfs4_bitmask_set(__u32 bitmask[NFS4_BITMASK_SZ],
112 const __u32 *src, struct inode *inode,
113 struct nfs_server *server,
114 struct nfs4_label *label);
aa9c2669
DQ		 115
116#ifdef CONFIG_NFS_V4_SECURITY_LABEL
117static inline struct nfs4_label *
118nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
119 struct iattr *sattr, struct nfs4_label *label)
120{
121 int err;
122
123 if (label == NULL)
124 return NULL;
125
126 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0)
127 return NULL;
128
aa9c2669
DQ		 129 err = security_dentry_init_security(dentry, sattr->ia_mode,
130 &dentry->d_name, (void **)&label->label, &label->len);
131 if (err == 0)
132 return label;
133
134 return NULL;
135}
136static inline void
137nfs4_label_release_security(struct nfs4_label *label)
138{
b1393bc0
CS		 139 struct lsmcontext scaff; /* scaffolding */
140
141 if (label) {
142 lsmcontext_init(&scaff, label->label, label->len, 0);
143 security_release_secctx(&scaff);
144 }
aa9c2669
DQ		 145}
146static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
147{
148 if (label)
149 return server->attr_bitmask;
150
151 return server->attr_bitmask_nl;
152}
153#else
154static inline struct nfs4_label *
155nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
156 struct iattr *sattr, struct nfs4_label *l)
157{ return NULL; }
158static inline void
159nfs4_label_release_security(struct nfs4_label *label)
160{ return; }
161static inline u32 *
162nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
163{ return server->attr_bitmask; }
164#endif
165
1da177e4 166/* Prevent leaks of NFSv4 errors into userland */
46f72f57 167static int nfs4_map_errors(int err)
1da177e4 168{
52567b03
TM		 169 if (err >= -1000)
170 return err;
171 switch (err) {
172 case -NFS4ERR_RESOURCE:
30005121
WAA		 173 case -NFS4ERR_LAYOUTTRYLATER:
174 case -NFS4ERR_RECALLCONFLICT:
52567b03 175 return -EREMOTEIO;
7ebb9315 176 case -NFS4ERR_WRONGSEC:
8897538e 177 case -NFS4ERR_WRONG_CRED:
7ebb9315 178 return -EPERM;
3ddeb7c5
TM		 179 case -NFS4ERR_BADOWNER:
180 case -NFS4ERR_BADNAME:
181 return -EINVAL;
fb13bfa7
TM		 182 case -NFS4ERR_SHARE_DENIED:
183 return -EACCES;
f25efd85
SD		 184 case -NFS4ERR_MINOR_VERS_MISMATCH:
185 return -EPROTONOSUPPORT;
6e3cf241
TM		 186 case -NFS4ERR_FILE_OPEN:
187 return -EBUSY;
9fff59ed
TM		 188 case -NFS4ERR_NOT_SAME:
189 return -ENOTSYNC;
52567b03 190 default:
1da177e4 191 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 192 __func__, -err);
52567b03 193 break;
1da177e4 194 }
52567b03 195 return -EIO;
1da177e4
LT		 196}
197
198/*
199 * This is our standard bitmap for GETATTR requests.
200 */
1549210f 201const u32 nfs4_fattr_bitmap[3] = {
1da177e4
LT		 202 FATTR4_WORD0_TYPE
203 | FATTR4_WORD0_CHANGE
204 | FATTR4_WORD0_SIZE
205 | FATTR4_WORD0_FSID
206 | FATTR4_WORD0_FILEID,
207 FATTR4_WORD1_MODE
208 | FATTR4_WORD1_NUMLINKS
209 | FATTR4_WORD1_OWNER
210 | FATTR4_WORD1_OWNER_GROUP
211 | FATTR4_WORD1_RAWDEV
212 | FATTR4_WORD1_SPACE_USED
213 | FATTR4_WORD1_TIME_ACCESS
214 | FATTR4_WORD1_TIME_METADATA
ea96d1ec
AS		 215 | FATTR4_WORD1_TIME_MODIFY
216 | FATTR4_WORD1_MOUNTED_ON_FILEID,
aa9c2669
DQ		 217#ifdef CONFIG_NFS_V4_SECURITY_LABEL
218 FATTR4_WORD2_SECURITY_LABEL
219#endif
1da177e4
LT		 220};
221
1549210f
TM		 222static const u32 nfs4_pnfs_open_bitmap[3] = {
223 FATTR4_WORD0_TYPE
224 | FATTR4_WORD0_CHANGE
225 | FATTR4_WORD0_SIZE
226 | FATTR4_WORD0_FSID
227 | FATTR4_WORD0_FILEID,
228 FATTR4_WORD1_MODE
229 | FATTR4_WORD1_NUMLINKS
230 | FATTR4_WORD1_OWNER
231 | FATTR4_WORD1_OWNER_GROUP
232 | FATTR4_WORD1_RAWDEV
233 | FATTR4_WORD1_SPACE_USED
234 | FATTR4_WORD1_TIME_ACCESS
235 | FATTR4_WORD1_TIME_METADATA
236 | FATTR4_WORD1_TIME_MODIFY,
237 FATTR4_WORD2_MDSTHRESHOLD
95864c91
TM		 238#ifdef CONFIG_NFS_V4_SECURITY_LABEL
239 | FATTR4_WORD2_SECURITY_LABEL
240#endif
1549210f
TM		 241};
242
e23008ec
AA		 243static const u32 nfs4_open_noattr_bitmap[3] = {
244 FATTR4_WORD0_TYPE
e23008ec
AA		 245 | FATTR4_WORD0_FILEID,
246};
247
a09df2ca 248const u32 nfs4_statfs_bitmap[3] = {
1da177e4
LT		 249 FATTR4_WORD0_FILES_AVAIL
250 | FATTR4_WORD0_FILES_FREE
251 | FATTR4_WORD0_FILES_TOTAL,
252 FATTR4_WORD1_SPACE_AVAIL
253 | FATTR4_WORD1_SPACE_FREE
254 | FATTR4_WORD1_SPACE_TOTAL
255};
256
a09df2ca 257const u32 nfs4_pathconf_bitmap[3] = {
1da177e4
LT		 258 FATTR4_WORD0_MAXLINK
259 | FATTR4_WORD0_MAXNAME,
260 0
261};
262
dae100c2 263const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
1da177e4
LT		 264 | FATTR4_WORD0_MAXREAD
265 | FATTR4_WORD0_MAXWRITE
266 | FATTR4_WORD0_LEASE_TIME,
55b6e774 267 FATTR4_WORD1_TIME_DELTA
dae100c2
FI		 268 | FATTR4_WORD1_FS_LAYOUT_TYPES,
269 FATTR4_WORD2_LAYOUT_BLKSIZE
2a92ee92 270 | FATTR4_WORD2_CLONE_BLKSIZE
7f08a335 271 | FATTR4_WORD2_CHANGE_ATTR_TYPE
b78ef845 272 | FATTR4_WORD2_XATTR_SUPPORT
1da177e4
LT		 273};
274
a09df2ca 275const u32 nfs4_fs_locations_bitmap[3] = {
c05cefcc 276 FATTR4_WORD0_CHANGE
830b8e33
MN		 277 | FATTR4_WORD0_SIZE
278 | FATTR4_WORD0_FSID
279 | FATTR4_WORD0_FILEID
280 | FATTR4_WORD0_FS_LOCATIONS,
c05cefcc 281 FATTR4_WORD1_OWNER
830b8e33
MN		 282 | FATTR4_WORD1_OWNER_GROUP
283 | FATTR4_WORD1_RAWDEV
284 | FATTR4_WORD1_SPACE_USED
285 | FATTR4_WORD1_TIME_ACCESS
286 | FATTR4_WORD1_TIME_METADATA
287 | FATTR4_WORD1_TIME_MODIFY
a09df2ca 288 | FATTR4_WORD1_MOUNTED_ON_FILEID,
830b8e33
MN		 289};
290
30846df0 291static void nfs4_bitmap_copy_adjust(__u32 *dst, const __u32 *src,
a71029b8 292 struct inode *inode, unsigned long flags)
30846df0
TM		 293{
294 unsigned long cache_validity;
295
296 memcpy(dst, src, NFS4_BITMASK_SZ*sizeof(*dst));
297 if (!inode || !nfs4_have_delegation(inode, FMODE_READ))
298 return;
299
a71029b8 300 cache_validity = READ_ONCE(NFS_I(inode)->cache_validity) | flags;
30846df0 301
a71029b8
TM		 302 /* Remove the attributes over which we have full control */
303 dst[1] &= ~FATTR4_WORD1_RAWDEV;
30846df0
TM		 304 if (!(cache_validity & NFS_INO_INVALID_SIZE))
305 dst[0] &= ~FATTR4_WORD0_SIZE;
306
307 if (!(cache_validity & NFS_INO_INVALID_CHANGE))
308 dst[0] &= ~FATTR4_WORD0_CHANGE;
30846df0 309
720869eb
TM		 310 if (!(cache_validity & NFS_INO_INVALID_MODE))
311 dst[1] &= ~FATTR4_WORD1_MODE;
a71029b8 312 if (!(cache_validity & NFS_INO_INVALID_OTHER))
720869eb 313 dst[1] &= ~(FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP);
30846df0
TM		 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) {
dfe1fe75
TM		 596 if (exception->task_is_privileged)
597 return -EDEADLOCK;
b3c2aa07
TM		 598 ret = nfs4_wait_clnt_recover(clp);
599 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
600 return -EIO;
601 goto out_retry;
602 }
603 return ret;
604out_retry:
a2c0b9e2
TM		 605 if (ret == 0)
606 exception->retry = 1;
607 return ret;
65de872e
TM		 608}
609
037fc980
TM		 610static int
611nfs4_async_handle_exception(struct rpc_task *task, struct nfs_server *server,
612 int errorcode, struct nfs4_exception *exception)
613{
614 struct nfs_client *clp = server->nfs_client;
615 int ret;
616
617 ret = nfs4_do_handle_exception(server, errorcode, exception);
618 if (exception->delay) {
619 rpc_delay(task, nfs4_update_delay(&exception->timeout));
620 goto out_retry;
621 }
622 if (exception->recovering) {
dfe1fe75
TM		 623 if (exception->task_is_privileged)
624 return -EDEADLOCK;
037fc980
TM		 625 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
626 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
627 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
628 goto out_retry;
629 }
519ae255 630 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
037fc980
TM		 631 ret = -EIO;
632 return ret;
633out_retry:
0f90be13 634 if (ret == 0) {
a2c0b9e2 635 exception->retry = 1;
0f90be13
BB		 636 /*
637 * For NFS4ERR_MOVED, the client transport will need to
638 * be recomputed after migration recovery has completed.
639 */
640 if (errorcode == -NFS4ERR_MOVED)
641 rpc_task_release_transport(task);
642 }
a2c0b9e2 643 return ret;
65de872e
TM		 644}
645
0f913a57 646int
037fc980
TM		 647nfs4_async_handle_error(struct rpc_task *task, struct nfs_server *server,
648 struct nfs4_state *state, long *timeout)
649{
650 struct nfs4_exception exception = {
651 .state = state,
652 };
653
654 if (task->tk_status >= 0)
655 return 0;
656 if (timeout)
657 exception.timeout = *timeout;
658 task->tk_status = nfs4_async_handle_exception(task, server,
659 task->tk_status,
660 &exception);
661 if (exception.delay && timeout)
662 *timeout = exception.timeout;
663 if (exception.retry)
664 return -EAGAIN;
665 return 0;
666}
667
a5250def
WAA		 668/*
669 * Return 'true' if 'clp' is using an rpc_client that is integrity protected
670 * or 'false' otherwise.
671 */
672static bool _nfs4_is_integrity_protected(struct nfs_client *clp)
673{
674 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor;
eeea5361 675 return (flavor == RPC_AUTH_GSS_KRB5I) || (flavor == RPC_AUTH_GSS_KRB5P);
a5250def 676}
65de872e 677
452e9352 678static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 679{
1da177e4
LT		 680 spin_lock(&clp->cl_lock);
681 if (time_before(clp->cl_last_renewal,timestamp))
682 clp->cl_last_renewal = timestamp;
683 spin_unlock(&clp->cl_lock);
684}
685
452e9352
TM		 686static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
687{
be824167
TM		 688 struct nfs_client *clp = server->nfs_client;
689
690 if (!nfs4_has_session(clp))
691 do_renew_lease(clp, timestamp);
452e9352
TM		 692}
693
2a3eb2b9
CL		 694struct nfs4_call_sync_data {
695 const struct nfs_server *seq_server;
696 struct nfs4_sequence_args *seq_args;
697 struct nfs4_sequence_res *seq_res;
698};
699
be3a5d23 700void nfs4_init_sequence(struct nfs4_sequence_args *args,
fba83f34
AS		 701 struct nfs4_sequence_res *res, int cache_reply,
702 int privileged)
a9c92d6b
CL		 703{
704 args->sa_slot = NULL;
705 args->sa_cache_this = cache_reply;
fba83f34 706 args->sa_privileged = privileged;
a9c92d6b
CL		 707
708 res->sr_slot = NULL;
709}
710
2e80dbe7 711static void nfs40_sequence_free_slot(struct nfs4_sequence_res *res)
3bd2384a
CL		 712{
713 struct nfs4_slot *slot = res->sr_slot;
714 struct nfs4_slot_table *tbl;
715
3bd2384a
CL		 716 tbl = slot->table;
717 spin_lock(&tbl->slot_tbl_lock);
718 if (!nfs41_wake_and_assign_slot(tbl, slot))
719 nfs4_free_slot(tbl, slot);
720 spin_unlock(&tbl->slot_tbl_lock);
721
722 res->sr_slot = NULL;
2e80dbe7
TM		 723}
724
725static int nfs40_sequence_done(struct rpc_task *task,
726 struct nfs4_sequence_res *res)
727{
728 if (res->sr_slot != NULL)
729 nfs40_sequence_free_slot(res);
3bd2384a
CL		 730 return 1;
731}
732
cccef3b9
AA		 733#if defined(CONFIG_NFS_V4_1)
734
3be0f80b 735static void nfs41_release_slot(struct nfs4_slot *slot)
13615871 736{
e3725ec0 737 struct nfs4_session *session;
13615871 738 struct nfs4_slot_table *tbl;
c10e4498 739 bool send_new_highest_used_slotid = false;
13615871 740
3be0f80b
TM		 741 if (!slot)
742 return;
a13ce7c6 743 tbl = slot->table;
e3725ec0 744 session = tbl->session;
ea028ac9 745
07e8dcbd
TM		 746 /* Bump the slot sequence number */
747 if (slot->seq_done)
748 slot->seq_nr++;
749 slot->seq_done = 0;
750
35dc1d74 751 spin_lock(&tbl->slot_tbl_lock);
c10e4498
TM		 752 /* Be nice to the server: try to ensure that the last transmitted
753 * value for highest_user_slotid <= target_highest_slotid
754 */
755 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
756 send_new_highest_used_slotid = true;
757
a13ce7c6 758 if (nfs41_wake_and_assign_slot(tbl, slot)) {
b75ad4cd
TM		 759 send_new_highest_used_slotid = false;
760 goto out_unlock;
761 }
a13ce7c6 762 nfs4_free_slot(tbl, slot);
c10e4498
TM		 763
764 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
765 send_new_highest_used_slotid = false;
b75ad4cd 766out_unlock:
35dc1d74 767 spin_unlock(&tbl->slot_tbl_lock);
c10e4498 768 if (send_new_highest_used_slotid)
3f10a6af 769 nfs41_notify_server(session->clp);
045d2a6d
TM		 770 if (waitqueue_active(&tbl->slot_waitq))
771 wake_up_all(&tbl->slot_waitq);
13615871
AA		 772}
773
3be0f80b
TM		 774static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
775{
776 nfs41_release_slot(res->sr_slot);
777 res->sr_slot = NULL;
778}
779
3453d570
TM		 780static void nfs4_slot_sequence_record_sent(struct nfs4_slot *slot,
781 u32 seqnr)
782{
783 if ((s32)(seqnr - slot->seq_nr_highest_sent) > 0)
784 slot->seq_nr_highest_sent = seqnr;
785}
786static void nfs4_slot_sequence_acked(struct nfs4_slot *slot,
787 u32 seqnr)
788{
789 slot->seq_nr_highest_sent = seqnr;
790 slot->seq_nr_last_acked = seqnr;
791}
792
913fadc5
AS		 793static void nfs4_probe_sequence(struct nfs_client *client, const struct cred *cred,
794 struct nfs4_slot *slot)
795{
796 struct rpc_task *task = _nfs41_proc_sequence(client, cred, slot, true);
797 if (!IS_ERR(task))
798 rpc_put_task_async(task);
799}
800
2e80dbe7
TM		 801static int nfs41_sequence_process(struct rpc_task *task,
802 struct nfs4_sequence_res *res)
b0df806c 803{
e3725ec0 804 struct nfs4_session *session;
a13ce7c6 805 struct nfs4_slot *slot = res->sr_slot;
14516c3a 806 struct nfs_client *clp;
5c441544 807 int status;
85563073 808 int ret = 1;
b0df806c 809
a13ce7c6
TM		 810 if (slot == NULL)
811 goto out_noaction;
468f8613 812 /* don't increment the sequence number if the task wasn't sent */
c71c46f0 813 if (!RPC_WAS_SENT(task) || slot->seq_done)
b0df806c
AA		 814 goto out;
815
e3725ec0 816 session = slot->table->session;
913fadc5 817 clp = session->clp;
933602e3 818
2f92ae34 819 trace_nfs4_sequence_done(session, res);
5c441544
TM		 820
821 status = res->sr_status;
822 if (task->tk_status == -NFS4ERR_DEADSESSION)
823 status = -NFS4ERR_DEADSESSION;
824
691daf3b 825 /* Check the SEQUENCE operation status */
5c441544 826 switch (status) {
14516c3a 827 case 0:
3453d570
TM		 828 /* Mark this sequence number as having been acked */
829 nfs4_slot_sequence_acked(slot, slot->seq_nr);
b0df806c 830 /* Update the slot's sequence and clientid lease timer */
07e8dcbd 831 slot->seq_done = 1;
8e63b6a8 832 do_renew_lease(clp, res->sr_timestamp);
0629e370 833 /* Check sequence flags */
0a014a44
TM		 834 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags,
835 !!slot->privileged);
464ee9f9 836 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a 837 break;
ac20d163
TM		 838 case 1:
839 /*
840 * sr_status remains 1 if an RPC level error occurred.
841 * The server may or may not have processed the sequence
842 * operation..
ac20d163 843 */
3453d570
TM		 844 nfs4_slot_sequence_record_sent(slot, slot->seq_nr);
845 slot->seq_done = 1;
ac20d163 846 goto out;
14516c3a
TM		 847 case -NFS4ERR_DELAY:
848 /* The server detected a resend of the RPC call and
849 * returned NFS4ERR_DELAY as per Section 2.10.6.2
850 * of RFC5661.
851 */
df2fabff 852 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 853 __func__,
df2fabff 854 slot->slot_nr,
933602e3 855 slot->seq_nr);
3453d570 856 nfs4_slot_sequence_acked(slot, slot->seq_nr);
14516c3a 857 goto out_retry;
f9312a54
TM		 858 case -NFS4ERR_RETRY_UNCACHED_REP:
859 case -NFS4ERR_SEQ_FALSE_RETRY:
860 /*
861 * The server thinks we tried to replay a request.
862 * Retry the call after bumping the sequence ID.
863 */
3453d570 864 nfs4_slot_sequence_acked(slot, slot->seq_nr);
f9312a54 865 goto retry_new_seq;
85563073
TM		 866 case -NFS4ERR_BADSLOT:
867 /*
868 * The slot id we used was probably retired. Try again
869 * using a different slot id.
870 */
99589100 871 if (slot->slot_nr < slot->table->target_highest_slotid)
3be0f80b 872 goto session_recover;
e8794440
TM		 873 goto retry_nowait;
874 case -NFS4ERR_SEQ_MISORDERED:
3453d570 875 nfs4_slot_sequence_record_sent(slot, slot->seq_nr);
ac20d163 876 /*
3453d570
TM		 877 * Were one or more calls using this slot interrupted?
878 * If the server never received the request, then our
913fadc5
AS		 879 * transmitted slot sequence number may be too high. However,
880 * if the server did receive the request then it might
881 * accidentally give us a reply with a mismatched operation.
882 * We can sort this out by sending a lone sequence operation
883 * to the server on the same slot.
e8794440 884 */
3453d570
TM		 885 if ((s32)(slot->seq_nr - slot->seq_nr_last_acked) > 1) {
886 slot->seq_nr--;
913fadc5
AS		 887 if (task->tk_msg.rpc_proc != &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE]) {
888 nfs4_probe_sequence(clp, task->tk_msg.rpc_cred, slot);
889 res->sr_slot = NULL;
890 }
8e63b6a8
TM		 891 goto retry_nowait;
892 }
3453d570
TM		 893 /*
894 * RFC5661:
895 * A retry might be sent while the original request is
896 * still in progress on the replier. The replier SHOULD
897 * deal with the issue by returning NFS4ERR_DELAY as the
898 * reply to SEQUENCE or CB_SEQUENCE operation, but
899 * implementations MAY return NFS4ERR_SEQ_MISORDERED.
900 *
901 * Restart the search after a delay.
902 */
903 slot->seq_nr = slot->seq_nr_highest_sent;
904 goto out_retry;
5c441544
TM		 905 case -NFS4ERR_BADSESSION:
906 case -NFS4ERR_DEADSESSION:
907 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
908 goto session_recover;
14516c3a
TM		 909 default:
910 /* Just update the slot sequence no. */
07e8dcbd 911 slot->seq_done = 1;
b0df806c
AA		 912 }
913out:
914 /* The session may be reset by one of the error handlers. */
915 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
a13ce7c6 916out_noaction:
85563073 917 return ret;
3be0f80b 918session_recover:
5c441544
TM		 919 nfs4_schedule_session_recovery(session, status);
920 dprintk("%s ERROR: %d Reset session\n", __func__, status);
921 nfs41_sequence_free_slot(res);
922 goto out;
3be0f80b
TM		 923retry_new_seq:
924 ++slot->seq_nr;
e8794440
TM		 925retry_nowait:
926 if (rpc_restart_call_prepare(task)) {
2e80dbe7 927 nfs41_sequence_free_slot(res);
e8794440
TM		 928 task->tk_status = 0;
929 ret = 0;
930 }
931 goto out;
14516c3a 932out_retry:
d05dd4e9 933 if (!rpc_restart_call(task))
14516c3a
TM		 934 goto out;
935 rpc_delay(task, NFS4_POLL_RETRY_MAX);
936 return 0;
b0df806c 937}
2e80dbe7
TM		 938
939int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
940{
941 if (!nfs41_sequence_process(task, res))
942 return 0;
943 if (res->sr_slot != NULL)
944 nfs41_sequence_free_slot(res);
945 return 1;
946
947}
f9c96fcc 948EXPORT_SYMBOL_GPL(nfs41_sequence_done);
b0df806c 949
2e80dbe7
TM		 950static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res)
951{
952 if (res->sr_slot == NULL)
953 return 1;
954 if (res->sr_slot->table->session != NULL)
955 return nfs41_sequence_process(task, res);
956 return nfs40_sequence_done(task, res);
957}
958
959static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res)
960{
961 if (res->sr_slot != NULL) {
962 if (res->sr_slot->table->session != NULL)
963 nfs41_sequence_free_slot(res);
964 else
965 nfs40_sequence_free_slot(res);
966 }
967}
968
2c4b131d 969int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
df896455 970{
e3725ec0 971 if (res->sr_slot == NULL)
14516c3a 972 return 1;
3bd2384a
CL		 973 if (!res->sr_slot->table->session)
974 return nfs40_sequence_done(task, res);
14516c3a 975 return nfs41_sequence_done(task, res);
df896455 976}
2c4b131d 977EXPORT_SYMBOL_GPL(nfs4_sequence_done);
df896455 978
ce5039c1
AA		 979static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
980{
2a3eb2b9 981 struct nfs4_call_sync_data *data = calldata;
ce5039c1 982
035168ab
TM		 983 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
984
7981c8a6
AS		 985 nfs4_setup_sequence(data->seq_server->nfs_client,
986 data->seq_args, data->seq_res, task);
ce5039c1
AA		 987}
988
69ab40c4
AA		 989static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
990{
2a3eb2b9 991 struct nfs4_call_sync_data *data = calldata;
69ab40c4 992
14516c3a 993 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 994}
995
17280175 996static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 997 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 998 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 999};
1000
3bd2384a
CL		 1001#else /* !CONFIG_NFS_V4_1 */
1002
2e80dbe7
TM		 1003static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res)
1004{
1005 return nfs40_sequence_done(task, res);
1006}
1007
1008static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res)
1009{
1010 if (res->sr_slot != NULL)
1011 nfs40_sequence_free_slot(res);
1012}
1013
2c4b131d
PT		 1014int nfs4_sequence_done(struct rpc_task *task,
1015 struct nfs4_sequence_res *res)
9915ea7e 1016{
3bd2384a 1017 return nfs40_sequence_done(task, res);
9915ea7e 1018}
2c4b131d 1019EXPORT_SYMBOL_GPL(nfs4_sequence_done);
3bd2384a
CL		 1020
1021#endif /* !CONFIG_NFS_V4_1 */
9915ea7e 1022
c1dffe0b
TM		 1023static void nfs41_sequence_res_init(struct nfs4_sequence_res *res)
1024{
1025 res->sr_timestamp = jiffies;
1026 res->sr_status_flags = 0;
1027 res->sr_status = 1;
1028}
1029
3be0f80b
TM		 1030static
1031void nfs4_sequence_attach_slot(struct nfs4_sequence_args *args,
1032 struct nfs4_sequence_res *res,
1033 struct nfs4_slot *slot)
1034{
1035 if (!slot)
1036 return;
1037 slot->privileged = args->sa_privileged ? 1 : 0;
1038 args->sa_slot = slot;
1039
1040 res->sr_slot = slot;
3be0f80b
TM		 1041}
1042
1043int nfs4_setup_sequence(struct nfs_client *client,
7981c8a6
AS		 1044 struct nfs4_sequence_args *args,
1045 struct nfs4_sequence_res *res,
1046 struct rpc_task *task)
1047{
7981c8a6 1048 struct nfs4_session *session = nfs4_get_session(client);
76ee0354 1049 struct nfs4_slot_table *tbl = client->cl_slot_tbl;
3d35808b 1050 struct nfs4_slot *slot;
7981c8a6 1051
9dd9107f
AS		 1052 /* slot already allocated? */
1053 if (res->sr_slot != NULL)
1054 goto out_start;
1055
6b2e6856 1056 if (session)
76ee0354 1057 tbl = &session->fc_slot_table;
76ee0354 1058
3453d570
TM		 1059 spin_lock(&tbl->slot_tbl_lock);
1060 /* The state manager will wait until the slot table is empty */
1061 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
1062 goto out_sleep;
1063
1064 slot = nfs4_alloc_slot(tbl);
1065 if (IS_ERR(slot)) {
3453d570 1066 if (slot == ERR_PTR(-ENOMEM))
6b2e6856 1067 goto out_sleep_timeout;
3453d570 1068 goto out_sleep;
3d35808b 1069 }
3453d570 1070 spin_unlock(&tbl->slot_tbl_lock);
3d35808b 1071
3be0f80b 1072 nfs4_sequence_attach_slot(args, res, slot);
3d35808b 1073
ad05cc0f 1074 trace_nfs4_setup_sequence(session, args);
9dd9107f 1075out_start:
c1dffe0b 1076 nfs41_sequence_res_init(res);
9dd9107f
AS		 1077 rpc_call_start(task);
1078 return 0;
6b2e6856
TM		 1079out_sleep_timeout:
1080 /* Try again in 1/4 second */
1081 if (args->sa_privileged)
1082 rpc_sleep_on_priority_timeout(&tbl->slot_tbl_waitq, task,
1083 jiffies + (HZ >> 2), RPC_PRIORITY_PRIVILEGED);
1084 else
1085 rpc_sleep_on_timeout(&tbl->slot_tbl_waitq, task,
1086 NULL, jiffies + (HZ >> 2));
1087 spin_unlock(&tbl->slot_tbl_lock);
1088 return -EAGAIN;
0dcee8bb
AS		 1089out_sleep:
1090 if (args->sa_privileged)
1091 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
8357a9b6 1092 RPC_PRIORITY_PRIVILEGED);
0dcee8bb
AS		 1093 else
1094 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
1095 spin_unlock(&tbl->slot_tbl_lock);
1096 return -EAGAIN;
7981c8a6
AS		 1097}
1098EXPORT_SYMBOL_GPL(nfs4_setup_sequence);
1099
9915ea7e
CL		 1100static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
1101{
1102 struct nfs4_call_sync_data *data = calldata;
42e1cca7 1103 nfs4_setup_sequence(data->seq_server->nfs_client,
9915ea7e
CL		 1104 data->seq_args, data->seq_res, task);
1105}
1106
1107static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
1108{
1109 struct nfs4_call_sync_data *data = calldata;
1110 nfs4_sequence_done(task, data->seq_res);
1111}
1112
1113static const struct rpc_call_ops nfs40_call_sync_ops = {
1114 .rpc_call_prepare = nfs40_call_sync_prepare,
1115 .rpc_call_done = nfs40_call_sync_done,
1116};
1117
48c05854
AS		 1118static int nfs4_call_sync_custom(struct rpc_task_setup *task_setup)
1119{
1120 int ret;
1121 struct rpc_task *task;
1122
1123 task = rpc_run_task(task_setup);
1124 if (IS_ERR(task))
1125 return PTR_ERR(task);
1126
1127 ret = task->tk_status;
1128 rpc_put_task(task);
1129 return ret;
1130}
1131
c74dfe97
TM		 1132static int nfs4_do_call_sync(struct rpc_clnt *clnt,
1133 struct nfs_server *server,
1134 struct rpc_message *msg,
1135 struct nfs4_sequence_args *args,
1136 struct nfs4_sequence_res *res,
1137 unsigned short task_flags)
ce5039c1 1138{
9915ea7e 1139 struct nfs_client *clp = server->nfs_client;
2a3eb2b9 1140 struct nfs4_call_sync_data data = {
035168ab 1141 .seq_server = server,
ce5039c1
AA		 1142 .seq_args = args,
1143 .seq_res = res,
ce5039c1
AA		 1144 };
1145 struct rpc_task_setup task_setup = {
7c513058 1146 .rpc_client = clnt,
ce5039c1 1147 .rpc_message = msg,
9915ea7e 1148 .callback_ops = clp->cl_mvops->call_sync_ops,
c74dfe97
TM		 1149 .callback_data = &data,
1150 .flags = task_flags,
ce5039c1
AA		 1151 };
1152
48c05854 1153 return nfs4_call_sync_custom(&task_setup);
ce5039c1
AA		 1154}
1155
c74dfe97
TM		 1156static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
1157 struct nfs_server *server,
1158 struct rpc_message *msg,
1159 struct nfs4_sequence_args *args,
1160 struct nfs4_sequence_res *res)
1161{
85e39fee
OK		 1162 unsigned short task_flags = 0;
1163
1164 if (server->nfs_client->cl_minorversion)
1165 task_flags = RPC_TASK_MOVEABLE;
1166 return nfs4_do_call_sync(clnt, server, msg, args, res, task_flags);
c74dfe97
TM		 1167}
1168
1169
7c513058
BS		 1170int nfs4_call_sync(struct rpc_clnt *clnt,
1171 struct nfs_server *server,
e73b83f2
BS		 1172 struct rpc_message *msg,
1173 struct nfs4_sequence_args *args,
1174 struct nfs4_sequence_res *res,
1175 int cache_reply)
1176{
fba83f34 1177 nfs4_init_sequence(args, res, cache_reply, 0);
9915ea7e 1178 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
e73b83f2 1179}
cccef3b9 1180
3c591175
TM		 1181static void
1182nfs4_inc_nlink_locked(struct inode *inode)
1183{
82eae5a4
TM		 1184 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE |
1185 NFS_INO_INVALID_CTIME |
1186 NFS_INO_INVALID_NLINK);
3c591175
TM		 1187 inc_nlink(inode);
1188}
1189
1301e421
TM		 1190static void
1191nfs4_inc_nlink(struct inode *inode)
1192{
1193 spin_lock(&inode->i_lock);
1194 nfs4_inc_nlink_locked(inode);
1195 spin_unlock(&inode->i_lock);
1196}
1197
3c591175
TM		 1198static void
1199nfs4_dec_nlink_locked(struct inode *inode)
1200{
82eae5a4
TM		 1201 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE |
1202 NFS_INO_INVALID_CTIME |
1203 NFS_INO_INVALID_NLINK);
3c591175
TM		 1204 drop_nlink(inode);
1205}
1206
1207static void
1b523ca9
FL		 1208nfs4_update_changeattr_locked(struct inode *inode,
1209 struct nfs4_change_info *cinfo,
5636ec4e 1210 unsigned long timestamp, unsigned long cache_validity)
1da177e4 1211{
1b523ca9 1212 struct nfs_inode *nfsi = NFS_I(inode);
6f9be83d 1213 u64 change_attr = inode_peek_iversion_raw(inode);
1da177e4 1214
b6f80a2e 1215 cache_validity |= NFS_INO_INVALID_CTIME | NFS_INO_INVALID_MTIME;
20cf7d4e
TM		 1216 if (S_ISDIR(inode->i_mode))
1217 cache_validity |= NFS_INO_INVALID_DATA;
1b523ca9 1218
6f9be83d
TM		 1219 switch (NFS_SERVER(inode)->change_attr_type) {
1220 case NFS4_CHANGE_TYPE_IS_UNDEFINED:
20cf7d4e 1221 if (cinfo->after == change_attr)
6f9be83d
TM		 1222 goto out;
1223 break;
1224 default:
1225 if ((s64)(change_attr - cinfo->after) >= 0)
1226 goto out;
1227 }
1228
20cf7d4e
TM		 1229 inode_set_iversion_raw(inode, cinfo->after);
1230 if (!cinfo->atomic || cinfo->before != change_attr) {
1231 if (S_ISDIR(inode->i_mode))
1b523ca9 1232 nfs_force_lookup_revalidate(inode);
1b523ca9 1233
20cf7d4e
TM		 1234 if (!NFS_PROTO(inode)->have_delegation(inode, FMODE_READ))
1235 cache_validity |=
1236 NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL |
1237 NFS_INO_INVALID_SIZE | NFS_INO_INVALID_OTHER |
1238 NFS_INO_INVALID_BLOCKS | NFS_INO_INVALID_NLINK |
b47f7b5d 1239 NFS_INO_INVALID_MODE | NFS_INO_INVALID_XATTR;
20cf7d4e 1240 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
e603a4c1 1241 }
20cf7d4e 1242 nfsi->attrtimeo_timestamp = jiffies;
d3129ef6 1243 nfsi->read_cache_jiffies = timestamp;
3235b403 1244 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
c8d07159 1245 nfsi->cache_validity &= ~NFS_INO_INVALID_CHANGE;
6f9be83d
TM		 1246out:
1247 nfs_set_cache_invalid(inode, cache_validity);
3c591175
TM		 1248}
1249
1b523ca9
FL		 1250void
1251nfs4_update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo,
5636ec4e 1252 unsigned long timestamp, unsigned long cache_validity)
3c591175
TM		 1253{
1254 spin_lock(&dir->i_lock);
1b523ca9 1255 nfs4_update_changeattr_locked(dir, cinfo, timestamp, cache_validity);
38478b24 1256 spin_unlock(&dir->i_lock);
1da177e4
LT		 1257}
1258
8fd1ab74
TM		 1259struct nfs4_open_createattrs {
1260 struct nfs4_label *label;
1261 struct iattr *sattr;
1262 const __u32 verf[2];
1263};
1264
49f9a0fa
TM		 1265static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
1266 int err, struct nfs4_exception *exception)
1267{
1268 if (err != -EINVAL)
1269 return false;
1270 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1271 return false;
1272 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
1273 exception->retry = 1;
1274 return true;
1275}
1276
1bf85d8c
TM		 1277static fmode_t _nfs4_ctx_to_accessmode(const struct nfs_open_context *ctx)
1278{
1279 return ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
1280}
1281
1282static fmode_t _nfs4_ctx_to_openmode(const struct nfs_open_context *ctx)
1283{
1284 fmode_t ret = ctx->mode & (FMODE_READ|FMODE_WRITE);
1285
1286 return (ctx->mode & FMODE_EXEC) ? FMODE_READ | ret : ret;
1287}
1288
6ae37339
TM		 1289static u32
1290nfs4_map_atomic_open_share(struct nfs_server *server,
1291 fmode_t fmode, int openflags)
1292{
1293 u32 res = 0;
1294
1295 switch (fmode & (FMODE_READ | FMODE_WRITE)) {
1296 case FMODE_READ:
1297 res = NFS4_SHARE_ACCESS_READ;
1298 break;
1299 case FMODE_WRITE:
1300 res = NFS4_SHARE_ACCESS_WRITE;
1301 break;
1302 case FMODE_READ|FMODE_WRITE:
1303 res = NFS4_SHARE_ACCESS_BOTH;
1304 }
1305 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1306 goto out;
1307 /* Want no delegation if we're using O_DIRECT */
1308 if (openflags & O_DIRECT)
1309 res |= NFS4_SHARE_WANT_NO_DELEG;
1310out:
1311 return res;
1312}
1313
49f9a0fa
TM		 1314static enum open_claim_type4
1315nfs4_map_atomic_open_claim(struct nfs_server *server,
1316 enum open_claim_type4 claim)
1317{
1318 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
1319 return claim;
1320 switch (claim) {
1321 default:
1322 return claim;
1323 case NFS4_OPEN_CLAIM_FH:
1324 return NFS4_OPEN_CLAIM_NULL;
1325 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1326 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
1327 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1328 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
1329 }
1330}
2ced46c2
TM		 1331
1332static void nfs4_init_opendata_res(struct nfs4_opendata *p)
1333{
1334 p->o_res.f_attr = &p->f_attr;
1775fd3e 1335 p->o_res.f_label = p->f_label;
c1d51931
TM		 1336 p->o_res.seqid = p->o_arg.seqid;
1337 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 1338 p->o_res.server = p->o_arg.server;
5f657530 1339 p->o_res.access_request = p->o_arg.access;
2ced46c2 1340 nfs_fattr_init(&p->f_attr);
6926afd1 1341 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 1342}
1343
82a2c1b7 1344static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 1345 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8fd1ab74 1346 const struct nfs4_open_createattrs *c,
4a1c0893 1347 enum open_claim_type4 claim,
8535b2be 1348 gfp_t gfp_mask)
e56e0b78 1349{
82a2c1b7 1350 struct dentry *parent = dget_parent(dentry);
2b0143b5 1351 struct inode *dir = d_inode(parent);
e56e0b78 1352 struct nfs_server *server = NFS_SERVER(dir);
63f5f796 1353 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
8fd1ab74 1354 struct nfs4_label *label = (c != NULL) ? c->label : NULL;
e56e0b78
TM		 1355 struct nfs4_opendata *p;
1356
8535b2be 1357 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 1358 if (p == NULL)
1359 goto err;
14c43f76
DQ		 1360
1361 p->f_label = nfs4_label_alloc(server, gfp_mask);
1362 if (IS_ERR(p->f_label))
1363 goto err_free_p;
1364
a49c2691
KM		 1365 p->a_label = nfs4_label_alloc(server, gfp_mask);
1366 if (IS_ERR(p->a_label))
1367 goto err_free_f;
1368
63f5f796
TM		 1369 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
1370 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask);
badc76dd 1371 if (IS_ERR(p->o_arg.seqid))
14c43f76 1372 goto err_free_label;
82a2c1b7
AV		 1373 nfs_sb_active(dentry->d_sb);
1374 p->dentry = dget(dentry);
e56e0b78
TM		 1375 p->dir = parent;
1376 p->owner = sp;
1377 atomic_inc(&sp->so_count);
dc0b027d
TM		 1378 p->o_arg.open_flags = flags;
1379 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
536585cc 1380 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
6ae37339
TM		 1381 p->o_arg.share_access = nfs4_map_atomic_open_share(server,
1382 fmode, flags);
90910519
BC		 1383 if (flags & O_CREAT) {
1384 p->o_arg.umask = current_umask();
1385 p->o_arg.label = nfs4_label_copy(p->a_label, label);
1386 if (c->sattr != NULL && c->sattr->ia_valid != 0) {
1387 p->o_arg.u.attrs = &p->attrs;
1388 memcpy(&p->attrs, c->sattr, sizeof(p->attrs));
1389
1390 memcpy(p->o_arg.u.verifier.data, c->verf,
1391 sizeof(p->o_arg.u.verifier.data));
1392 }
1393 }
ae2bb032
WAA		 1394 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
1395 * will return permission denied for all bits until close */
1396 if (!(flags & O_EXCL)) {
1397 /* ask server to check for all possible rights as results
1398 * are cached */
536585cc
TM		 1399 switch (p->o_arg.claim) {
1400 default:
1401 break;
1402 case NFS4_OPEN_CLAIM_NULL:
1403 case NFS4_OPEN_CLAIM_FH:
1404 p->o_arg.access = NFS4_ACCESS_READ |
1405 NFS4_ACCESS_MODIFY |
1406 NFS4_ACCESS_EXTEND |
1407 NFS4_ACCESS_EXECUTE;
72832a24
FL		 1408#ifdef CONFIG_NFS_V4_2
1409 if (server->caps & NFS_CAP_XATTR)
1410 p->o_arg.access |= NFS4_ACCESS_XAREAD |
1411 NFS4_ACCESS_XAWRITE |
1412 NFS4_ACCESS_XALIST;
1413#endif
536585cc 1414 }
ae2bb032 1415 }
7539bbab 1416 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 1417 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1418 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 1419 p->o_arg.name = &dentry->d_name;
e56e0b78 1420 p->o_arg.server = server;
aa9c2669 1421 p->o_arg.bitmask = nfs4_bitmask(server, label);
1549210f 1422 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
49f9a0fa 1423 switch (p->o_arg.claim) {
4a1c0893
TM		 1424 case NFS4_OPEN_CLAIM_NULL:
1425 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1426 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1427 p->o_arg.fh = NFS_FH(dir);
1428 break;
1429 case NFS4_OPEN_CLAIM_PREVIOUS:
1430 case NFS4_OPEN_CLAIM_FH:
1431 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1432 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
2b0143b5 1433 p->o_arg.fh = NFS_FH(d_inode(dentry));
4a1c0893 1434 }
cdd4e68b
TM		 1435 p->c_arg.fh = &p->o_res.fh;
1436 p->c_arg.stateid = &p->o_res.stateid;
1437 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 1438 nfs4_init_opendata_res(p);
c6d00e63 1439 kref_init(&p->kref);
e56e0b78 1440 return p;
14c43f76
DQ		 1441
1442err_free_label:
a49c2691
KM		 1443 nfs4_label_free(p->a_label);
1444err_free_f:
14c43f76
DQ		 1445 nfs4_label_free(p->f_label);
1446err_free_p:
e56e0b78
TM		 1447 kfree(p);
1448err:
1449 dput(parent);
1450 return NULL;
1451}
1452
c6d00e63 1453static void nfs4_opendata_free(struct kref *kref)
e56e0b78 1454{
c6d00e63
TM		 1455 struct nfs4_opendata *p = container_of(kref,
1456 struct nfs4_opendata, kref);
82a2c1b7 1457 struct super_block *sb = p->dentry->d_sb;
c6d00e63 1458
30ae2412 1459 nfs4_lgopen_release(p->lgp);
c6d00e63 1460 nfs_free_seqid(p->o_arg.seqid);
2e80dbe7 1461 nfs4_sequence_free_slot(&p->o_res.seq_res);
aac00a8d
TM		 1462 if (p->state != NULL)
1463 nfs4_put_open_state(p->state);
c6d00e63 1464 nfs4_put_state_owner(p->owner);
14c43f76 1465
a49c2691 1466 nfs4_label_free(p->a_label);
14c43f76
DQ		 1467 nfs4_label_free(p->f_label);
1468
c6d00e63 1469 dput(p->dir);
82a2c1b7
AV		 1470 dput(p->dentry);
1471 nfs_sb_deactive(sb);
6926afd1 1472 nfs_fattr_free_names(&p->f_attr);
e911b815 1473 kfree(p->f_attr.mdsthreshold);
c6d00e63
TM		 1474 kfree(p);
1475}
1476
1477static void nfs4_opendata_put(struct nfs4_opendata *p)
1478{
1479 if (p != NULL)
1480 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 1481}
1482
24311f88
TM		 1483static bool nfs4_mode_match_open_stateid(struct nfs4_state *state,
1484 fmode_t fmode)
1485{
1486 switch(fmode & (FMODE_READ|FMODE_WRITE)) {
1487 case FMODE_READ|FMODE_WRITE:
1488 return state->n_rdwr != 0;
1489 case FMODE_WRITE:
1490 return state->n_wronly != 0;
1491 case FMODE_READ:
1492 return state->n_rdonly != 0;
1493 }
1494 WARN_ON_ONCE(1);
1495 return false;
1496}
1497
be189f7e
TM		 1498static int can_open_cached(struct nfs4_state *state, fmode_t mode,
1499 int open_mode, enum open_claim_type4 claim)
6ee41268
TM		 1500{
1501 int ret = 0;
dc0b027d 1502
536e43d1 1503 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d 1504 goto out;
be189f7e
TM		 1505 switch (claim) {
1506 case NFS4_OPEN_CLAIM_NULL:
1507 case NFS4_OPEN_CLAIM_FH:
1508 goto out;
1509 default:
1510 break;
1511 }
dc0b027d 1512 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 1513 case FMODE_READ:
88069f77
TM		 1514 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1515 && state->n_rdonly != 0;
6ee41268
TM		 1516 break;
1517 case FMODE_WRITE:
88069f77
TM		 1518 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1519 && state->n_wronly != 0;
6ee41268
TM		 1520 break;
1521 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 1522 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1523 && state->n_rdwr != 0;
6ee41268 1524 }
dc0b027d 1525out:
6ee41268
TM		 1526 return ret;
1527}
1528
2a606188
TM		 1529static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode,
1530 enum open_claim_type4 claim)
aac00a8d 1531{
652f89f6
TM		 1532 if (delegation == NULL)
1533 return 0;
dc0b027d 1534 if ((delegation->type & fmode) != fmode)
aac00a8d 1535 return 0;
2a606188
TM		 1536 switch (claim) {
1537 case NFS4_OPEN_CLAIM_NULL:
1538 case NFS4_OPEN_CLAIM_FH:
1539 break;
1540 case NFS4_OPEN_CLAIM_PREVIOUS:
1541 if (!test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
1542 break;
df561f66 1543 fallthrough;
2a606188
TM		 1544 default:
1545 return 0;
1546 }
b7391f44 1547 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 1548 return 1;
1549}
1550
dc0b027d 1551static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 1552{
dc0b027d 1553 switch (fmode) {
e7616923
TM		 1554 case FMODE_WRITE:
1555 state->n_wronly++;
1556 break;
1557 case FMODE_READ:
1558 state->n_rdonly++;
1559 break;
1560 case FMODE_READ|FMODE_WRITE:
1561 state->n_rdwr++;
1562 }
dc0b027d 1563 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 1564}
1565
8a64c4ef
TM		 1566#ifdef CONFIG_NFS_V4_1
1567static bool nfs_open_stateid_recover_openmode(struct nfs4_state *state)
1568{
1569 if (state->n_rdonly && !test_bit(NFS_O_RDONLY_STATE, &state->flags))
1570 return true;
1571 if (state->n_wronly && !test_bit(NFS_O_WRONLY_STATE, &state->flags))
1572 return true;
1573 if (state->n_rdwr && !test_bit(NFS_O_RDWR_STATE, &state->flags))
1574 return true;
1575 return false;
1576}
1577#endif /* CONFIG_NFS_V4_1 */
1578
c9399f21
TM		 1579static void nfs_state_log_update_open_stateid(struct nfs4_state *state)
1580{
1581 if (test_and_clear_bit(NFS_STATE_CHANGE_WAIT, &state->flags))
1582 wake_up_all(&state->waitq);
1583}
1584
4f14c194
TM		 1585static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
1586{
1587 struct nfs_client *clp = state->owner->so_server->nfs_client;
1588 bool need_recover = false;
1589
1590 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly)
1591 need_recover = true;
1592 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly)
1593 need_recover = true;
1594 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr)
1595 need_recover = true;
1596 if (need_recover)
1597 nfs4_state_mark_reclaim_nograce(clp, state);
1598}
1599
c9399f21
TM		 1600/*
1601 * Check for whether or not the caller may update the open stateid
1602 * to the value passed in by stateid.
1603 *
1604 * Note: This function relies heavily on the server implementing
1605 * RFC7530 Section 9.1.4.2, and RFC5661 Section 8.2.2
1606 * correctly.
1607 * i.e. The stateid seqids have to be initialised to 1, and
1608 * are then incremented on every state transition.
1609 */
b4868b44 1610static bool nfs_stateid_is_sequential(struct nfs4_state *state,
c9399f21 1611 const nfs4_stateid *stateid)
e999e80e 1612{
b4868b44
BC		 1613 if (test_bit(NFS_OPEN_STATE, &state->flags)) {
1614 /* The common case - we're updating to a new sequence number */
f7b76545
TM		 1615 if (nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1616 if (nfs4_stateid_is_next(&state->open_stateid, stateid))
1617 return true;
1618 return false;
b4868b44 1619 }
f7b76545 1620 /* The server returned a new stateid */
c9399f21 1621 }
f7b76545
TM		 1622 /* This is the first OPEN in this generation */
1623 if (stateid->seqid == cpu_to_be32(1))
1624 return true;
e999e80e
TM		 1625 return false;
1626}
1627
f95549cf
TM		 1628static void nfs_resync_open_stateid_locked(struct nfs4_state *state)
1629{
3c38cbe2
TM		 1630 if (!(state->n_wronly || state->n_rdonly || state->n_rdwr))
1631 return;
f95549cf
TM		 1632 if (state->n_wronly)
1633 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1634 if (state->n_rdonly)
1635 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1636 if (state->n_rdwr)
1637 set_bit(NFS_O_RDWR_STATE, &state->flags);
3c38cbe2 1638 set_bit(NFS_OPEN_STATE, &state->flags);
f95549cf
TM		 1639}
1640
226056c5
TM		 1641static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
1642 nfs4_stateid *stateid, fmode_t fmode)
003707c7 1643{
226056c5
TM		 1644 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1645 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1646 case FMODE_WRITE:
1647 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1648 break;
1649 case FMODE_READ:
1650 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1651 break;
1652 case 0:
1653 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1654 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1655 clear_bit(NFS_OPEN_STATE, &state->flags);
1656 }
1657 if (stateid == NULL)
1658 return;
3e7dfb16
TM		 1659 /* Handle OPEN+OPEN_DOWNGRADE races */
1660 if (nfs4_stateid_match_other(stateid, &state->open_stateid) &&
1661 !nfs4_stateid_is_newer(stateid, &state->open_stateid)) {
f95549cf 1662 nfs_resync_open_stateid_locked(state);
c9399f21 1663 goto out;
f95549cf 1664 }
003707c7 1665 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 1666 nfs4_stateid_copy(&state->stateid, stateid);
1667 nfs4_stateid_copy(&state->open_stateid, stateid);
ad9e02dc 1668 trace_nfs4_open_stateid_update(state->inode, stateid, 0);
c9399f21
TM		 1669out:
1670 nfs_state_log_update_open_stateid(state);
226056c5
TM		 1671}
1672
4a1e2feb
TM		 1673static void nfs_clear_open_stateid(struct nfs4_state *state,
1674 nfs4_stateid *arg_stateid,
1675 nfs4_stateid *stateid, fmode_t fmode)
226056c5
TM		 1676{
1677 write_seqlock(&state->seqlock);
3e7dfb16
TM		 1678 /* Ignore, if the CLOSE argment doesn't match the current stateid */
1679 if (nfs4_state_match_open_stateid_other(state, arg_stateid))
1680 nfs_clear_open_stateid_locked(state, stateid, fmode);
226056c5 1681 write_sequnlock(&state->seqlock);
4f14c194
TM		 1682 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1683 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
226056c5
TM		 1684}
1685
1393d961 1686static void nfs_set_open_stateid_locked(struct nfs4_state *state,
c9399f21 1687 const nfs4_stateid *stateid, nfs4_stateid *freeme)
e9acf210
TM		 1688 __must_hold(&state->owner->so_lock)
1689 __must_hold(&state->seqlock)
1690 __must_hold(RCU)
1691
003707c7 1692{
c9399f21
TM		 1693 DEFINE_WAIT(wait);
1694 int status = 0;
1695 for (;;) {
1696
b4868b44 1697 if (nfs_stateid_is_sequential(state, stateid))
003707c7 1698 break;
b4868b44 1699
c9399f21 1700 if (status)
003707c7 1701 break;
c9399f21
TM		 1702 /* Rely on seqids for serialisation with NFSv4.0 */
1703 if (!nfs4_has_session(NFS_SERVER(state->inode)->nfs_client))
1704 break;
1705
b4868b44 1706 set_bit(NFS_STATE_CHANGE_WAIT, &state->flags);
c9399f21
TM		 1707 prepare_to_wait(&state->waitq, &wait, TASK_KILLABLE);
1708 /*
1709 * Ensure we process the state changes in the same order
1710 * in which the server processed them by delaying the
1711 * update of the stateid until we are in sequence.
1712 */
1713 write_sequnlock(&state->seqlock);
1714 spin_unlock(&state->owner->so_lock);
1715 rcu_read_unlock();
ad9e02dc 1716 trace_nfs4_open_stateid_update_wait(state->inode, stateid, 0);
b4868b44 1717
bb002388 1718 if (!fatal_signal_pending(current)) {
c9399f21
TM		 1719 if (schedule_timeout(5*HZ) == 0)
1720 status = -EAGAIN;
1721 else
1722 status = 0;
1723 } else
1724 status = -EINTR;
1725 finish_wait(&state->waitq, &wait);
1726 rcu_read_lock();
1727 spin_lock(&state->owner->so_lock);
1728 write_seqlock(&state->seqlock);
003707c7 1729 }
c9399f21 1730
e1fff5df
TM		 1731 if (test_bit(NFS_OPEN_STATE, &state->flags) &&
1732 !nfs4_stateid_match_other(stateid, &state->open_stateid)) {
c9399f21
TM		 1733 nfs4_stateid_copy(freeme, &state->open_stateid);
1734 nfs_test_and_clear_all_open_stateid(state);
1735 }
1736
e999e80e
TM		 1737 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1738 nfs4_stateid_copy(&state->stateid, stateid);
1739 nfs4_stateid_copy(&state->open_stateid, stateid);
ad9e02dc 1740 trace_nfs4_open_stateid_update(state->inode, stateid, status);
c9399f21 1741 nfs_state_log_update_open_stateid(state);
003707c7
TM		 1742}
1743
c9399f21 1744static void nfs_state_set_open_stateid(struct nfs4_state *state,
1393d961 1745 const nfs4_stateid *open_stateid,
1393d961
TM		 1746 fmode_t fmode,
1747 nfs4_stateid *freeme)
1da177e4 1748{
8bda4e4c
TM		 1749 /*
1750 * Protect the call to nfs4_state_set_mode_locked and
1751 * serialise the stateid update
1752 */
1753 write_seqlock(&state->seqlock);
c9399f21
TM		 1754 nfs_set_open_stateid_locked(state, open_stateid, freeme);
1755 switch (fmode) {
1756 case FMODE_READ:
1757 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1758 break;
1759 case FMODE_WRITE:
1760 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1761 break;
1762 case FMODE_READ|FMODE_WRITE:
1763 set_bit(NFS_O_RDWR_STATE, &state->flags);
003707c7 1764 }
c9399f21
TM		 1765 set_bit(NFS_OPEN_STATE, &state->flags);
1766 write_sequnlock(&state->seqlock);
1767}
1768
27a30cf6
TM		 1769static void nfs_state_clear_open_state_flags(struct nfs4_state *state)
1770{
1771 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1772 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1773 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1774 clear_bit(NFS_OPEN_STATE, &state->flags);
1775}
1776
c9399f21
TM		 1777static void nfs_state_set_delegation(struct nfs4_state *state,
1778 const nfs4_stateid *deleg_stateid,
1779 fmode_t fmode)
1780{
1781 /*
1782 * Protect the call to nfs4_state_set_mode_locked and
1783 * serialise the stateid update
1784 */
1785 write_seqlock(&state->seqlock);
1786 nfs4_stateid_copy(&state->stateid, deleg_stateid);
1787 set_bit(NFS_DELEGATED_STATE, &state->flags);
8bda4e4c 1788 write_sequnlock(&state->seqlock);
1da177e4
LT		 1789}
1790
9f0c5124
TM		 1791static void nfs_state_clear_delegation(struct nfs4_state *state)
1792{
1793 write_seqlock(&state->seqlock);
1794 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1795 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1796 write_sequnlock(&state->seqlock);
1797}
1798
ec4b0925 1799int update_open_stateid(struct nfs4_state *state,
1393d961
TM		 1800 const nfs4_stateid *open_stateid,
1801 const nfs4_stateid *delegation,
1802 fmode_t fmode)
34310430 1803{
1393d961
TM		 1804 struct nfs_server *server = NFS_SERVER(state->inode);
1805 struct nfs_client *clp = server->nfs_client;
34310430
TM		 1806 struct nfs_inode *nfsi = NFS_I(state->inode);
1807 struct nfs_delegation *deleg_cur;
83aa3e0f 1808 nfs4_stateid freeme = { };
34310430
TM		 1809 int ret = 0;
1810
dc0b027d 1811 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1812
1813 rcu_read_lock();
c9399f21
TM		 1814 spin_lock(&state->owner->so_lock);
1815 if (open_stateid != NULL) {
1816 nfs_state_set_open_stateid(state, open_stateid, fmode, &freeme);
1817 ret = 1;
1818 }
1819
333ac786 1820 deleg_cur = nfs4_get_valid_delegation(state->inode);
34310430
TM		 1821 if (deleg_cur == NULL)
1822 goto no_delegation;
1823
1824 spin_lock(&deleg_cur->lock);
17f26b12 1825 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
d25be546 1826 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1827 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1828 goto no_delegation_unlock;
1829
1830 if (delegation == NULL)
1831 delegation = &deleg_cur->stateid;
333ac786 1832 else if (!nfs4_stateid_match_other(&deleg_cur->stateid, delegation))
34310430
TM		 1833 goto no_delegation_unlock;
1834
b7391f44 1835 nfs_mark_delegation_referenced(deleg_cur);
c9399f21 1836 nfs_state_set_delegation(state, &deleg_cur->stateid, fmode);
34310430
TM		 1837 ret = 1;
1838no_delegation_unlock:
1839 spin_unlock(&deleg_cur->lock);
1840no_delegation:
c9399f21
TM		 1841 if (ret)
1842 update_open_stateflags(state, fmode);
1843 spin_unlock(&state->owner->so_lock);
34310430
TM		 1844 rcu_read_unlock();
1845
4f14c194 1846 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1393d961
TM		 1847 nfs4_schedule_state_manager(clp);
1848 if (freeme.type != 0)
1849 nfs4_test_and_free_stateid(server, &freeme,
1850 state->owner->so_cred);
34310430
TM		 1851
1852 return ret;
1853}
1854
39071e6f
TM		 1855static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp,
1856 const nfs4_stateid *stateid)
1857{
1858 struct nfs4_state *state = lsp->ls_state;
1859 bool ret = false;
1860
1861 spin_lock(&state->state_lock);
1862 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid))
1863 goto out_noupdate;
1864 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid))
1865 goto out_noupdate;
1866 nfs4_stateid_copy(&lsp->ls_stateid, stateid);
1867 ret = true;
1868out_noupdate:
1869 spin_unlock(&state->state_lock);
1870 return ret;
1871}
34310430 1872
dc0b027d 1873static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1874{
1875 struct nfs_delegation *delegation;
1876
f5086242 1877 fmode &= FMODE_READ|FMODE_WRITE;
aac00a8d 1878 rcu_read_lock();
40e6aa10 1879 delegation = nfs4_get_valid_delegation(inode);
dc0b027d 1880 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1881 rcu_read_unlock();
1882 return;
1883 }
1884 rcu_read_unlock();
57ec14c5 1885 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1886}
1887
6ee41268 1888static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1889{
1890 struct nfs4_state *state = opendata->state;
aac00a8d 1891 struct nfs_delegation *delegation;
f448badd 1892 int open_mode = opendata->o_arg.open_flags;
dc0b027d 1893 fmode_t fmode = opendata->o_arg.fmode;
2a606188 1894 enum open_claim_type4 claim = opendata->o_arg.claim;
aac00a8d
TM		 1895 nfs4_stateid stateid;
1896 int ret = -EAGAIN;
1897
aac00a8d 1898 for (;;) {
61beef75 1899 spin_lock(&state->owner->so_lock);
be189f7e 1900 if (can_open_cached(state, fmode, open_mode, claim)) {
61beef75 1901 update_open_stateflags(state, fmode);
6ee41268 1902 spin_unlock(&state->owner->so_lock);
61beef75 1903 goto out_return_state;
6ee41268 1904 }
61beef75 1905 spin_unlock(&state->owner->so_lock);
34310430 1906 rcu_read_lock();
be3df3dd 1907 delegation = nfs4_get_valid_delegation(state->inode);
2a606188 1908 if (!can_open_delegated(delegation, fmode, claim)) {
34310430 1909 rcu_read_unlock();
aac00a8d 1910 break;
34310430 1911 }
aac00a8d 1912 /* Save the delegation */
f597c537 1913 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1914 rcu_read_unlock();
fa332941 1915 nfs_release_seqid(opendata->o_arg.seqid);
bdeca1b7
TM		 1916 if (!opendata->is_recover) {
1917 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1918 if (ret != 0)
1919 goto out;
1920 }
aac00a8d 1921 ret = -EAGAIN;
34310430
TM		 1922
1923 /* Try to update the stateid using the delegation */
dc0b027d 1924 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1925 goto out_return_state;
aac00a8d 1926 }
aac00a8d
TM		 1927out:
1928 return ERR_PTR(ret);
1929out_return_state:
ace9fad4 1930 refcount_inc(&state->count);
aac00a8d
TM		 1931 return state;
1932}
1933
e23008ec
AA		 1934static void
1935nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1936{
1937 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1938 struct nfs_delegation *delegation;
1939 int delegation_flags = 0;
1940
1941 rcu_read_lock();
1942 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1943 if (delegation)
1944 delegation_flags = delegation->flags;
1945 rcu_read_unlock();
72d79ff8
TM		 1946 switch (data->o_arg.claim) {
1947 default:
1948 break;
1949 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1950 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
e23008ec
AA		 1951 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1952 "returning a delegation for "
1953 "OPEN(CLAIM_DELEGATE_CUR)\n",
1954 clp->cl_hostname);
72d79ff8
TM		 1955 return;
1956 }
1957 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
e23008ec 1958 nfs_inode_set_delegation(state->inode,
35156bff
TM		 1959 data->owner->so_cred,
1960 data->o_res.delegation_type,
1961 &data->o_res.delegation,
1962 data->o_res.pagemod_limit);
e23008ec
AA		 1963 else
1964 nfs_inode_reclaim_delegation(state->inode,
35156bff
TM		 1965 data->owner->so_cred,
1966 data->o_res.delegation_type,
1967 &data->o_res.delegation,
1968 data->o_res.pagemod_limit);
8b199e58
JL		 1969
1970 if (data->o_res.do_recall)
1971 nfs_async_inode_return_delegation(state->inode,
1972 &data->o_res.delegation);
e23008ec
AA		 1973}
1974
1975/*
1976 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1977 * and update the nfs4_state.
1978 */
1979static struct nfs4_state *
1980_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1981{
1982 struct inode *inode = data->state->inode;
1983 struct nfs4_state *state = data->state;
1984 int ret;
1985
d2bfda2e 1986 if (!data->rpc_done) {
37a8484a
AS		 1987 if (data->rpc_status)
1988 return ERR_PTR(data->rpc_status);
d2bfda2e
WAA		 1989 /* cached opens have already been processed */
1990 goto update;
e23008ec
AA		 1991 }
1992
e23008ec
AA		 1993 ret = nfs_refresh_inode(inode, &data->f_attr);
1994 if (ret)
37a8484a 1995 return ERR_PTR(ret);
e23008ec
AA		 1996
1997 if (data->o_res.delegation_type != 0)
1998 nfs4_opendata_check_deleg(data, state);
d2bfda2e 1999update:
e3c8dc76
TM		 2000 if (!update_open_stateid(state, &data->o_res.stateid,
2001 NULL, data->o_arg.fmode))
2002 return ERR_PTR(-EAGAIN);
ace9fad4 2003 refcount_inc(&state->count);
e23008ec
AA		 2004
2005 return state;
e23008ec
AA		 2006}
2007
4e2fcac7
TM		 2008static struct inode *
2009nfs4_opendata_get_inode(struct nfs4_opendata *data)
2010{
2011 struct inode *inode;
2012
2013 switch (data->o_arg.claim) {
2014 case NFS4_OPEN_CLAIM_NULL:
2015 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
2016 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
2017 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
2018 return ERR_PTR(-EAGAIN);
2019 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh,
2020 &data->f_attr, data->f_label);
2021 break;
2022 default:
2023 inode = d_inode(data->dentry);
2024 ihold(inode);
2025 nfs_refresh_inode(inode, &data->f_attr);
2026 }
2027 return inode;
2028}
2029
e23008ec 2030static struct nfs4_state *
75e8c48b 2031nfs4_opendata_find_nfs4_state(struct nfs4_opendata *data)
24ac23ab 2032{
75e8c48b 2033 struct nfs4_state *state;
24ac23ab 2034 struct inode *inode;
75e8c48b
TM		 2035
2036 inode = nfs4_opendata_get_inode(data);
2037 if (IS_ERR(inode))
2038 return ERR_CAST(inode);
2039 if (data->state != NULL && data->state->inode == inode) {
2040 state = data->state;
ace9fad4 2041 refcount_inc(&state->count);
75e8c48b
TM		 2042 } else
2043 state = nfs4_get_open_state(inode, data->owner);
2044 iput(inode);
2045 if (state == NULL)
2046 state = ERR_PTR(-ENOMEM);
2047 return state;
2048}
2049
2050static struct nfs4_state *
2051_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
2052{
2053 struct nfs4_state *state;
24ac23ab 2054
aac00a8d 2055 if (!data->rpc_done) {
6ee41268 2056 state = nfs4_try_open_cached(data);
9759b0fb 2057 trace_nfs4_cached_open(data->state);
aac00a8d
TM		 2058 goto out;
2059 }
2060
75e8c48b
TM		 2061 state = nfs4_opendata_find_nfs4_state(data);
2062 if (IS_ERR(state))
2063 goto out;
2064
e23008ec
AA		 2065 if (data->o_res.delegation_type != 0)
2066 nfs4_opendata_check_deleg(data, state);
e3c8dc76
TM		 2067 if (!update_open_stateid(state, &data->o_res.stateid,
2068 NULL, data->o_arg.fmode)) {
2069 nfs4_put_open_state(state);
2070 state = ERR_PTR(-EAGAIN);
2071 }
aac00a8d 2072out:
7aa262b5 2073 nfs_release_seqid(data->o_arg.seqid);
24ac23ab
TM		 2074 return state;
2075}
2076
e23008ec
AA		 2077static struct nfs4_state *
2078nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
2079{
2e80dbe7
TM		 2080 struct nfs4_state *ret;
2081
e23008ec 2082 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
2e80dbe7
TM		 2083 ret =_nfs4_opendata_reclaim_to_nfs4_state(data);
2084 else
2085 ret = _nfs4_opendata_to_nfs4_state(data);
2086 nfs4_sequence_free_slot(&data->o_res.seq_res);
2087 return ret;
e23008ec
AA		 2088}
2089
0de43976
TM		 2090static struct nfs_open_context *
2091nfs4_state_find_open_context_mode(struct nfs4_state *state, fmode_t mode)
864472e9
TM		 2092{
2093 struct nfs_inode *nfsi = NFS_I(state->inode);
2094 struct nfs_open_context *ctx;
2095
0de43976
TM		 2096 rcu_read_lock();
2097 list_for_each_entry_rcu(ctx, &nfsi->open_files, list) {
864472e9
TM		 2098 if (ctx->state != state)
2099 continue;
0de43976
TM		 2100 if ((ctx->mode & mode) != mode)
2101 continue;
2102 if (!get_nfs_open_context(ctx))
2103 continue;
2104 rcu_read_unlock();
864472e9
TM		 2105 return ctx;
2106 }
0de43976 2107 rcu_read_unlock();
864472e9
TM		 2108 return ERR_PTR(-ENOENT);
2109}
2110
0de43976
TM		 2111static struct nfs_open_context *
2112nfs4_state_find_open_context(struct nfs4_state *state)
2113{
2114 struct nfs_open_context *ctx;
2115
2116 ctx = nfs4_state_find_open_context_mode(state, FMODE_READ|FMODE_WRITE);
2117 if (!IS_ERR(ctx))
2118 return ctx;
2119 ctx = nfs4_state_find_open_context_mode(state, FMODE_WRITE);
2120 if (!IS_ERR(ctx))
2121 return ctx;
2122 return nfs4_state_find_open_context_mode(state, FMODE_READ);
2123}
2124
4a1c0893
TM		 2125static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
2126 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 2127{
2128 struct nfs4_opendata *opendata;
2129
4a1c0893 2130 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
8fd1ab74 2131 NULL, claim, GFP_NOFS);
6f220ed5
TM		 2132 if (opendata == NULL)
2133 return ERR_PTR(-ENOMEM);
2134 opendata->state = state;
ace9fad4 2135 refcount_inc(&state->count);
6f220ed5
TM		 2136 return opendata;
2137}
2138
24311f88
TM		 2139static int nfs4_open_recover_helper(struct nfs4_opendata *opendata,
2140 fmode_t fmode)
864472e9 2141{
2ced46c2 2142 struct nfs4_state *newstate;
864472e9
TM		 2143 int ret;
2144
24311f88 2145 if (!nfs4_mode_match_open_stateid(opendata->state, fmode))
39f897fd 2146 return 0;
dc0b027d
TM		 2147 opendata->o_arg.open_flags = 0;
2148 opendata->o_arg.fmode = fmode;
be36e185
TM		 2149 opendata->o_arg.share_access = nfs4_map_atomic_open_share(
2150 NFS_SB(opendata->dentry->d_sb),
2151 fmode, 0);
2ced46c2
TM		 2152 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
2153 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
2154 nfs4_init_opendata_res(opendata);
b257957e 2155 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 2156 if (ret != 0)
2157 return ret;
2ced46c2 2158 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 2159 if (IS_ERR(newstate))
2160 return PTR_ERR(newstate);
24311f88
TM		 2161 if (newstate != opendata->state)
2162 ret = -ESTALE;
643168c2 2163 nfs4_close_state(newstate, fmode);
24311f88 2164 return ret;
864472e9
TM		 2165}
2166
2167static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
2168{
864472e9
TM		 2169 int ret;
2170
2171 /* memory barrier prior to reading state->n_* */
2172 smp_rmb();
24311f88
TM		 2173 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
2174 if (ret != 0)
2175 return ret;
2176 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE);
2177 if (ret != 0)
2178 return ret;
2179 ret = nfs4_open_recover_helper(opendata, FMODE_READ);
2180 if (ret != 0)
2181 return ret;
1ac7e2fd
TM		 2182 /*
2183 * We may have performed cached opens for all three recoveries.
2184 * Check if we need to update the current stateid.
2185 */
2186 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 2187 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 2188 write_seqlock(&state->seqlock);
1ac7e2fd 2189 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 2190 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 2191 write_sequnlock(&state->seqlock);
1ac7e2fd 2192 }
864472e9
TM		 2193 return 0;
2194}
2195
1da177e4
LT		 2196/*
2197 * OPEN_RECLAIM:
2198 * reclaim state on the server after a reboot.
1da177e4 2199 */
539cd03a 2200static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 2201{
1ac7e2fd 2202 struct nfs_delegation *delegation;
864472e9 2203 struct nfs4_opendata *opendata;
dc0b027d 2204 fmode_t delegation_type = 0;
1da177e4
LT		 2205 int status;
2206
4a1c0893
TM		 2207 opendata = nfs4_open_recoverdata_alloc(ctx, state,
2208 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 2209 if (IS_ERR(opendata))
2210 return PTR_ERR(opendata);
1ac7e2fd
TM		 2211 rcu_read_lock();
2212 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 2213 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 2214 delegation_type = delegation->type;
1ac7e2fd 2215 rcu_read_unlock();
864472e9
TM		 2216 opendata->o_arg.u.delegation_type = delegation_type;
2217 status = nfs4_open_recover(opendata, state);
c6d00e63 2218 nfs4_opendata_put(opendata);
1da177e4
LT		 2219 return status;
2220}
2221
539cd03a 2222static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 2223{
2224 struct nfs_server *server = NFS_SERVER(state->inode);
2225 struct nfs4_exception exception = { };
2226 int err;
2227 do {
539cd03a 2228 err = _nfs4_do_open_reclaim(ctx, state);
42113a75 2229 trace_nfs4_open_reclaim(ctx, 0, err);
49f9a0fa
TM		 2230 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2231 continue;
168667c4 2232 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 2233 break;
2234 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 2235 } while (exception.retry);
2236 return err;
2237}
2238
864472e9
TM		 2239static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
2240{
2241 struct nfs_open_context *ctx;
2242 int ret;
2243
2244 ctx = nfs4_state_find_open_context(state);
2245 if (IS_ERR(ctx))
91876b13 2246 return -EAGAIN;
27a30cf6
TM		 2247 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2248 nfs_state_clear_open_state_flags(state);
539cd03a 2249 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 2250 put_nfs_open_context(ctx);
2251 return ret;
2252}
2253
dce2630c 2254static 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 2255{
be76b5b6
TM		 2256 switch (err) {
2257 default:
2258 printk(KERN_ERR "NFS: %s: unhandled error "
2259 "%d.\n", __func__, err);
ffb81717 2260 fallthrough;
be76b5b6
TM		 2261 case 0:
2262 case -ENOENT:
8eee52af 2263 case -EAGAIN:
be76b5b6 2264 case -ESTALE:
67e7b52d 2265 case -ETIMEDOUT:
be76b5b6
TM		 2266 break;
2267 case -NFS4ERR_BADSESSION:
2268 case -NFS4ERR_BADSLOT:
2269 case -NFS4ERR_BAD_HIGH_SLOT:
2270 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
2271 case -NFS4ERR_DEADSESSION:
be76b5b6
TM		 2272 return -EAGAIN;
2273 case -NFS4ERR_STALE_CLIENTID:
2274 case -NFS4ERR_STALE_STATEID:
be76b5b6
TM		 2275 /* Don't recall a delegation if it was lost */
2276 nfs4_schedule_lease_recovery(server->nfs_client);
2277 return -EAGAIN;
352297b9
CL		 2278 case -NFS4ERR_MOVED:
2279 nfs4_schedule_migration_recovery(server);
2280 return -EAGAIN;
8ef2f8d4
CL		 2281 case -NFS4ERR_LEASE_MOVED:
2282 nfs4_schedule_lease_moved_recovery(server->nfs_client);
2283 return -EAGAIN;
be76b5b6
TM		 2284 case -NFS4ERR_DELEG_REVOKED:
2285 case -NFS4ERR_ADMIN_REVOKED:
404ea356 2286 case -NFS4ERR_EXPIRED:
be76b5b6 2287 case -NFS4ERR_BAD_STATEID:
db4f2e63 2288 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 2289 nfs_inode_find_state_and_recover(state->inode,
2290 stateid);
2291 nfs4_schedule_stateid_recovery(server, state);
869f9dfa 2292 return -EAGAIN;
be76b5b6
TM		 2293 case -NFS4ERR_DELAY:
2294 case -NFS4ERR_GRACE:
be76b5b6
TM		 2295 ssleep(1);
2296 return -EAGAIN;
db4f2e63
TM		 2297 case -ENOMEM:
2298 case -NFS4ERR_DENIED:
dce2630c
N		 2299 if (fl) {
2300 struct nfs4_lock_state *lsp = fl->fl_u.nfs4_fl.owner;
2301 if (lsp)
2302 set_bit(NFS_LOCK_LOST, &lsp->ls_flags);
2303 }
db4f2e63 2304 return 0;
be76b5b6 2305 }
1da177e4
LT		 2306 return err;
2307}
2308
24311f88 2309int nfs4_open_delegation_recall(struct nfs_open_context *ctx,
5eb8d18c 2310 struct nfs4_state *state, const nfs4_stateid *stateid)
db4f2e63
TM		 2311{
2312 struct nfs_server *server = NFS_SERVER(state->inode);
2313 struct nfs4_opendata *opendata;
24311f88 2314 int err = 0;
db4f2e63
TM		 2315
2316 opendata = nfs4_open_recoverdata_alloc(ctx, state,
2317 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
2318 if (IS_ERR(opendata))
2319 return PTR_ERR(opendata);
2320 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
5eb8d18c 2321 if (!test_bit(NFS_O_RDWR_STATE, &state->flags)) {
24311f88
TM		 2322 err = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
2323 if (err)
5eb8d18c
TM		 2324 goto out;
2325 }
2326 if (!test_bit(NFS_O_WRONLY_STATE, &state->flags)) {
24311f88
TM		 2327 err = nfs4_open_recover_helper(opendata, FMODE_WRITE);
2328 if (err)
5eb8d18c
TM		 2329 goto out;
2330 }
2331 if (!test_bit(NFS_O_RDONLY_STATE, &state->flags)) {
24311f88 2332 err = nfs4_open_recover_helper(opendata, FMODE_READ);
5eb8d18c
TM		 2333 if (err)
2334 goto out;
24311f88 2335 }
5eb8d18c
TM		 2336 nfs_state_clear_delegation(state);
2337out:
db4f2e63 2338 nfs4_opendata_put(opendata);
dce2630c 2339 return nfs4_handle_delegation_recall_error(server, state, stateid, NULL, err);
db4f2e63
TM		 2340}
2341
be05c860
CL		 2342static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
2343{
2344 struct nfs4_opendata *data = calldata;
2345
7981c8a6
AS		 2346 nfs4_setup_sequence(data->o_arg.server->nfs_client,
2347 &data->c_arg.seq_args, &data->c_res.seq_res, task);
be05c860
CL		 2348}
2349
cdd4e68b
TM		 2350static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
2351{
2352 struct nfs4_opendata *data = calldata;
2353
17ead6c8 2354 nfs40_sequence_done(task, &data->c_res.seq_res);
be05c860 2355
cdd4e68b 2356 data->rpc_status = task->tk_status;
26e976a8 2357 if (data->rpc_status == 0) {
f597c537 2358 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 2359 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 2360 renew_lease(data->o_res.server, data->timestamp);
a7a3b1e9 2361 data->rpc_done = true;
26e976a8 2362 }
cdd4e68b
TM		 2363}
2364
2365static void nfs4_open_confirm_release(void *calldata)
2366{
2367 struct nfs4_opendata *data = calldata;
2368 struct nfs4_state *state = NULL;
2369
2370 /* If this request hasn't been cancelled, do nothing */
a7a3b1e9 2371 if (!data->cancelled)
cdd4e68b
TM		 2372 goto out_free;
2373 /* In case of error, no cleanup! */
3e309914 2374 if (!data->rpc_done)
cdd4e68b 2375 goto out_free;
cdd4e68b 2376 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 2377 if (!IS_ERR(state))
643168c2 2378 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 2379out_free:
c6d00e63 2380 nfs4_opendata_put(data);
cdd4e68b
TM		 2381}
2382
2383static const struct rpc_call_ops nfs4_open_confirm_ops = {
be05c860 2384 .rpc_call_prepare = nfs4_open_confirm_prepare,
cdd4e68b
TM		 2385 .rpc_call_done = nfs4_open_confirm_done,
2386 .rpc_release = nfs4_open_confirm_release,
2387};
2388
2389/*
2390 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
2391 */
2392static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
2393{
2b0143b5 2394 struct nfs_server *server = NFS_SERVER(d_inode(data->dir));
cdd4e68b 2395 struct rpc_task *task;
5138fde0
TM		 2396 struct rpc_message msg = {
2397 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
2398 .rpc_argp = &data->c_arg,
2399 .rpc_resp = &data->c_res,
2400 .rpc_cred = data->owner->so_cred,
2401 };
c970aa85
TM		 2402 struct rpc_task_setup task_setup_data = {
2403 .rpc_client = server->client,
5138fde0 2404 .rpc_message = &msg,
c970aa85
TM		 2405 .callback_ops = &nfs4_open_confirm_ops,
2406 .callback_data = data,
101070ca 2407 .workqueue = nfsiod_workqueue,
61296507 2408 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF,
c970aa85 2409 };
1da177e4
LT		 2410 int status;
2411
fba83f34
AS		 2412 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1,
2413 data->is_recover);
c6d00e63 2414 kref_get(&data->kref);
a7a3b1e9 2415 data->rpc_done = false;
3e309914 2416 data->rpc_status = 0;
5138fde0 2417 data->timestamp = jiffies;
c970aa85 2418 task = rpc_run_task(&task_setup_data);
7a1218a2 2419 if (IS_ERR(task))
cdd4e68b 2420 return PTR_ERR(task);
820bf85c 2421 status = rpc_wait_for_completion_task(task);
cdd4e68b 2422 if (status != 0) {
a7a3b1e9 2423 data->cancelled = true;
cdd4e68b
TM		 2424 smp_wmb();
2425 } else
2426 status = data->rpc_status;
e6b3c4db 2427 rpc_put_task(task);
1da177e4
LT		 2428 return status;
2429}
2430
24ac23ab 2431static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 2432{
24ac23ab
TM		 2433 struct nfs4_opendata *data = calldata;
2434 struct nfs4_state_owner *sp = data->owner;
549b19cc 2435 struct nfs_client *clp = sp->so_server->nfs_client;
2a606188 2436 enum open_claim_type4 claim = data->o_arg.claim;
5138fde0 2437
24ac23ab 2438 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 2439 goto out_wait;
aac00a8d
TM		 2440 /*
2441 * Check if we still need to send an OPEN call, or if we can use
2442 * a delegation instead.
2443 */
2444 if (data->state != NULL) {
2445 struct nfs_delegation *delegation;
2446
be189f7e
TM		 2447 if (can_open_cached(data->state, data->o_arg.fmode,
2448 data->o_arg.open_flags, claim))
6ee41268 2449 goto out_no_action;
aac00a8d 2450 rcu_read_lock();
be3df3dd 2451 delegation = nfs4_get_valid_delegation(data->state->inode);
2a606188 2452 if (can_open_delegated(delegation, data->o_arg.fmode, claim))
652f89f6 2453 goto unlock_no_action;
aac00a8d
TM		 2454 rcu_read_unlock();
2455 }
95b72eb0 2456 /* Update client id. */
549b19cc 2457 data->o_arg.clientid = clp->cl_clientid;
2a606188
TM		 2458 switch (claim) {
2459 default:
2460 break;
8188df17
TM		 2461 case NFS4_OPEN_CLAIM_PREVIOUS:
2462 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
2463 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 2464 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
df561f66 2465 fallthrough;
8188df17
TM		 2466 case NFS4_OPEN_CLAIM_FH:
2467 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5 2468 }
26e976a8 2469 data->timestamp = jiffies;
42e1cca7 2470 if (nfs4_setup_sequence(data->o_arg.server->nfs_client,
d898528c 2471 &data->o_arg.seq_args,
2240a9e2
TM		 2472 &data->o_res.seq_res,
2473 task) != 0)
2474 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 2475
2476 /* Set the create mode (note dependency on the session type) */
2477 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
2478 if (data->o_arg.open_flags & O_EXCL) {
2479 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
2480 if (nfs4_has_persistent_session(clp))
2481 data->o_arg.createmode = NFS4_CREATE_GUARDED;
2482 else if (clp->cl_mvops->minor_version > 0)
2483 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
2484 }
6ee41268 2485 return;
652f89f6 2486unlock_no_action:
9759b0fb 2487 trace_nfs4_cached_open(data->state);
652f89f6 2488 rcu_read_unlock();
6ee41268
TM		 2489out_no_action:
2490 task->tk_action = NULL;
c8da19b9 2491out_wait:
b75ad4cd 2492 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 2493}
2494
24ac23ab
TM		 2495static void nfs4_open_done(struct rpc_task *task, void *calldata)
2496{
2497 struct nfs4_opendata *data = calldata;
1da177e4 2498
24ac23ab 2499 data->rpc_status = task->tk_status;
d898528c 2500
2e80dbe7 2501 if (!nfs4_sequence_process(task, &data->o_res.seq_res))
14516c3a 2502 return;
d898528c 2503
24ac23ab 2504 if (task->tk_status == 0) {
807d66d8
TM		 2505 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
2506 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 2507 case S_IFREG:
2508 break;
2509 case S_IFLNK:
24ac23ab 2510 data->rpc_status = -ELOOP;
6f926b5b
TM		 2511 break;
2512 case S_IFDIR:
24ac23ab 2513 data->rpc_status = -EISDIR;
6f926b5b
TM		 2514 break;
2515 default:
24ac23ab 2516 data->rpc_status = -ENOTDIR;
807d66d8 2517 }
6f926b5b 2518 }
26e976a8 2519 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 2520 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
2521 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 2522 }
a7a3b1e9 2523 data->rpc_done = true;
24ac23ab 2524}
6f926b5b 2525
24ac23ab
TM		 2526static void nfs4_open_release(void *calldata)
2527{
2528 struct nfs4_opendata *data = calldata;
2529 struct nfs4_state *state = NULL;
2530
2531 /* If this request hasn't been cancelled, do nothing */
a7a3b1e9 2532 if (!data->cancelled)
24ac23ab
TM		 2533 goto out_free;
2534 /* In case of error, no cleanup! */
3e309914 2535 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 2536 goto out_free;
2537 /* In case we need an open_confirm, no cleanup! */
2538 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
2539 goto out_free;
24ac23ab 2540 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 2541 if (!IS_ERR(state))
643168c2 2542 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 2543out_free:
c6d00e63 2544 nfs4_opendata_put(data);
24ac23ab
TM		 2545}
2546
2547static const struct rpc_call_ops nfs4_open_ops = {
2548 .rpc_call_prepare = nfs4_open_prepare,
2549 .rpc_call_done = nfs4_open_done,
2550 .rpc_release = nfs4_open_release,
2551};
2552
3b65a30d
FI		 2553static int nfs4_run_open_task(struct nfs4_opendata *data,
2554 struct nfs_open_context *ctx)
24ac23ab 2555{
2b0143b5 2556 struct inode *dir = d_inode(data->dir);
24ac23ab
TM		 2557 struct nfs_server *server = NFS_SERVER(dir);
2558 struct nfs_openargs *o_arg = &data->o_arg;
2559 struct nfs_openres *o_res = &data->o_res;
2560 struct rpc_task *task;
5138fde0
TM		 2561 struct rpc_message msg = {
2562 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
2563 .rpc_argp = o_arg,
2564 .rpc_resp = o_res,
2565 .rpc_cred = data->owner->so_cred,
2566 };
c970aa85
TM		 2567 struct rpc_task_setup task_setup_data = {
2568 .rpc_client = server->client,
5138fde0 2569 .rpc_message = &msg,
c970aa85
TM		 2570 .callback_ops = &nfs4_open_ops,
2571 .callback_data = data,
101070ca 2572 .workqueue = nfsiod_workqueue,
61296507 2573 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF,
c970aa85 2574 };
24ac23ab
TM		 2575 int status;
2576
85e39fee
OK		 2577 if (server->nfs_client->cl_minorversion)
2578 task_setup_data.flags |= RPC_TASK_MOVEABLE;
2579
c6d00e63 2580 kref_get(&data->kref);
a7a3b1e9 2581 data->rpc_done = false;
3e309914 2582 data->rpc_status = 0;
a7a3b1e9
BC		 2583 data->cancelled = false;
2584 data->is_recover = false;
3b65a30d
FI		 2585 if (!ctx) {
2586 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1, 1);
a7a3b1e9 2587 data->is_recover = true;
67e7b52d 2588 task_setup_data.flags |= RPC_TASK_TIMEOUT;
2409a976 2589 } else {
3b65a30d 2590 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1, 0);
2409a976
FI		 2591 pnfs_lgopen_prepare(data, ctx);
2592 }
c970aa85 2593 task = rpc_run_task(&task_setup_data);
d9b67e1e
AS		 2594 if (IS_ERR(task))
2595 return PTR_ERR(task);
820bf85c 2596 status = rpc_wait_for_completion_task(task);
d9b67e1e 2597 if (status != 0) {
a7a3b1e9 2598 data->cancelled = true;
d9b67e1e
AS		 2599 smp_wmb();
2600 } else
2601 status = data->rpc_status;
2602 rpc_put_task(task);
b257957e
AB		 2603
2604 return status;
2605}
2606
2607static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
2608{
2b0143b5 2609 struct inode *dir = d_inode(data->dir);
b257957e 2610 struct nfs_openres *o_res = &data->o_res;
d9b67e1e 2611 int status;
b257957e 2612
3b65a30d 2613 status = nfs4_run_open_task(data, NULL);
b257957e
AB		 2614 if (status != 0 || !data->rpc_done)
2615 return status;
2616
6926afd1
TM		 2617 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
2618
d7e98258 2619 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM)
b257957e 2620 status = _nfs4_proc_open_confirm(data);
b257957e
AB		 2621
2622 return status;
2623}
2624
f3792d63
TM		 2625/*
2626 * Additional permission checks in order to distinguish between an
2627 * open for read, and an open for execute. This works around the
2628 * fact that NFSv4 OPEN treats read and execute permissions as being
2629 * the same.
2630 * Note that in the non-execute case, we want to turn off permission
2631 * checking if we just created a new file (POSIX open() semantics).
2632 */
a52458b4 2633static int nfs4_opendata_access(const struct cred *cred,
6168f62c 2634 struct nfs4_opendata *opendata,
f8d9a897
WAA		 2635 struct nfs4_state *state, fmode_t fmode,
2636 int openflags)
6168f62c
WAA		 2637{
2638 struct nfs_access_entry cache;
1e6f2095 2639 u32 mask, flags;
6168f62c
WAA		 2640
2641 /* access call failed or for some reason the server doesn't
2642 * support any access modes -- defer access call until later */
2643 if (opendata->o_res.access_supported == 0)
2644 return 0;
2645
2646 mask = 0;
f3792d63
TM		 2647 /*
2648 * Use openflags to check for exec, because fmode won't
2649 * always have FMODE_EXEC set when file open for exec.
2650 */
f8d9a897
WAA		 2651 if (openflags & __FMODE_EXEC) {
2652 /* ONLY check for exec rights */
1e6f2095
AS		 2653 if (S_ISDIR(state->inode->i_mode))
2654 mask = NFS4_ACCESS_LOOKUP;
2655 else
2656 mask = NFS4_ACCESS_EXECUTE;
f3792d63 2657 } else if ((fmode & FMODE_READ) && !opendata->file_created)
1e6f2095 2658 mask = NFS4_ACCESS_READ;
6168f62c
WAA		 2659
2660 cache.cred = cred;
6168f62c
WAA		 2661 nfs_access_set_mask(&cache, opendata->o_res.access_result);
2662 nfs_access_add_cache(state->inode, &cache);
2663
1e6f2095
AS		 2664 flags = NFS4_ACCESS_READ | NFS4_ACCESS_EXECUTE | NFS4_ACCESS_LOOKUP;
2665 if ((mask & ~cache.mask & flags) == 0)
6168f62c
WAA		 2666 return 0;
2667
998f40b5 2668 return -EACCES;
6168f62c
WAA		 2669}
2670
b257957e
AB		 2671/*
2672 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2673 */
3b65a30d
FI		 2674static int _nfs4_proc_open(struct nfs4_opendata *data,
2675 struct nfs_open_context *ctx)
b257957e 2676{
2b0143b5 2677 struct inode *dir = d_inode(data->dir);
b257957e
AB		 2678 struct nfs_server *server = NFS_SERVER(dir);
2679 struct nfs_openargs *o_arg = &data->o_arg;
2680 struct nfs_openres *o_res = &data->o_res;
2681 int status;
2682
3b65a30d 2683 status = nfs4_run_open_task(data, ctx);
08ef7bd3
TM		 2684 if (!data->rpc_done)
2685 return status;
2686 if (status != 0) {
2687 if (status == -NFS4ERR_BADNAME &&
2688 !(o_arg->open_flags & O_CREAT))
2689 return -ENOENT;
24ac23ab 2690 return status;
08ef7bd3 2691 }
24ac23ab 2692
6926afd1
TM		 2693 nfs_fattr_map_and_free_names(server, &data->f_attr);
2694
5bc2afc2 2695 if (o_arg->open_flags & O_CREAT) {
5bc2afc2 2696 if (o_arg->open_flags & O_EXCL)
a7a3b1e9 2697 data->file_created = true;
5bc2afc2 2698 else if (o_res->cinfo.before != o_res->cinfo.after)
a7a3b1e9 2699 data->file_created = true;
1eb5d98f
JL		 2700 if (data->file_created ||
2701 inode_peek_iversion_raw(dir) != o_res->cinfo.after)
1b523ca9
FL		 2702 nfs4_update_changeattr(dir, &o_res->cinfo,
2703 o_res->f_attr->time_start,
2704 NFS_INO_INVALID_DATA);
5bc2afc2 2705 }
0df5dd4a
TM		 2706 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2707 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 2708 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 2709 status = _nfs4_proc_open_confirm(data);
1da177e4 2710 if (status != 0)
24ac23ab 2711 return status;
1da177e4 2712 }
56e0d71e
TM		 2713 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR)) {
2714 nfs4_sequence_free_slot(&o_res->seq_res);
a841b54d
TM		 2715 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr,
2716 o_res->f_label, NULL);
56e0d71e 2717 }
24ac23ab 2718 return 0;
1da177e4
LT		 2719}
2720
1da177e4
LT		 2721/*
2722 * OPEN_EXPIRED:
2723 * reclaim state on the server after a network partition.
2724 * Assumes caller holds the appropriate lock
2725 */
539cd03a 2726static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 2727{
e56e0b78 2728 struct nfs4_opendata *opendata;
864472e9 2729 int ret;
1da177e4 2730
4a1c0893 2731 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 2732 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 2733 if (IS_ERR(opendata))
2734 return PTR_ERR(opendata);
864472e9 2735 ret = nfs4_open_recover(opendata, state);
35d05778 2736 if (ret == -ESTALE)
3d4ff43d 2737 d_drop(ctx->dentry);
c6d00e63 2738 nfs4_opendata_put(opendata);
864472e9 2739 return ret;
1da177e4
LT		 2740}
2741
a9ed2e25 2742static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 2743{
539cd03a 2744 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 2745 struct nfs4_exception exception = { };
2746 int err;
2747
2748 do {
539cd03a 2749 err = _nfs4_open_expired(ctx, state);
42113a75 2750 trace_nfs4_open_expired(ctx, 0, err);
49f9a0fa
TM		 2751 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2752 continue;
a9ed2e25
TM		 2753 switch (err) {
2754 default:
2755 goto out;
2756 case -NFS4ERR_GRACE:
2757 case -NFS4ERR_DELAY:
2758 nfs4_handle_exception(server, err, &exception);
2759 err = 0;
2760 }
202b50dc 2761 } while (exception.retry);
a9ed2e25 2762out:
202b50dc
TM		 2763 return err;
2764}
2765
1da177e4
LT		 2766static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2767{
1da177e4 2768 struct nfs_open_context *ctx;
864472e9 2769 int ret;
1da177e4 2770
864472e9
TM		 2771 ctx = nfs4_state_find_open_context(state);
2772 if (IS_ERR(ctx))
91876b13 2773 return -EAGAIN;
539cd03a 2774 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 2775 put_nfs_open_context(ctx);
2776 return ret;
1da177e4
LT		 2777}
2778
41020b67
TM		 2779static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state,
2780 const nfs4_stateid *stateid)
4dfd4f7a 2781{
41020b67 2782 nfs_remove_bad_delegation(state->inode, stateid);
9f0c5124 2783 nfs_state_clear_delegation(state);
4dfd4f7a
TM		 2784}
2785
2786static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
2787{
2788 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
41020b67 2789 nfs_finish_clear_delegation_stateid(state, NULL);
4dfd4f7a
TM		 2790}
2791
2792static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2793{
2794 /* NFSv4.0 doesn't allow for delegation recovery on open expire */
2795 nfs40_clear_delegation_stateid(state);
27a30cf6 2796 nfs_state_clear_open_state_flags(state);
4dfd4f7a
TM		 2797 return nfs4_open_expired(sp, state);
2798}
2799
45870d69
TM		 2800static int nfs40_test_and_free_expired_stateid(struct nfs_server *server,
2801 nfs4_stateid *stateid,
a52458b4 2802 const struct cred *cred)
45870d69
TM		 2803{
2804 return -NFS4ERR_BAD_STATEID;
2805}
2806
f062eb6c 2807#if defined(CONFIG_NFS_V4_1)
4586f6e2
TM		 2808static int nfs41_test_and_free_expired_stateid(struct nfs_server *server,
2809 nfs4_stateid *stateid,
a52458b4 2810 const struct cred *cred)
4586f6e2
TM		 2811{
2812 int status;
2813
f7a62ada
TM		 2814 switch (stateid->type) {
2815 default:
2816 break;
2817 case NFS4_INVALID_STATEID_TYPE:
2818 case NFS4_SPECIAL_STATEID_TYPE:
2819 return -NFS4ERR_BAD_STATEID;
2820 case NFS4_REVOKED_STATEID_TYPE:
2821 goto out_free;
2822 }
4586f6e2 2823
f7a62ada 2824 status = nfs41_test_stateid(server, stateid, cred);
4586f6e2
TM		 2825 switch (status) {
2826 case -NFS4ERR_EXPIRED:
2827 case -NFS4ERR_ADMIN_REVOKED:
2828 case -NFS4ERR_DELEG_REVOKED:
f7a62ada
TM		 2829 break;
2830 default:
4586f6e2
TM		 2831 return status;
2832 }
f7a62ada
TM		 2833out_free:
2834 /* Ack the revoked state to the server */
f0b0bf88 2835 nfs41_free_stateid(server, stateid, cred, true);
f7a62ada 2836 return -NFS4ERR_EXPIRED;
4586f6e2
TM		 2837}
2838
27a30cf6 2839static int nfs41_check_delegation_stateid(struct nfs4_state *state)
f062eb6c 2840{
f062eb6c 2841 struct nfs_server *server = NFS_SERVER(state->inode);
0c116cad 2842 nfs4_stateid stateid;
ab7cb0df 2843 struct nfs_delegation *delegation;
a52458b4 2844 const struct cred *cred = NULL;
27a30cf6 2845 int status, ret = NFS_OK;
3e60ffdd 2846
ab7cb0df
TM		 2847 /* Get the delegation credential for use by test/free_stateid */
2848 rcu_read_lock();
2849 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
0c116cad 2850 if (delegation == NULL) {
ab7cb0df 2851 rcu_read_unlock();
9f0c5124 2852 nfs_state_clear_delegation(state);
27a30cf6 2853 return NFS_OK;
0c116cad
TM		 2854 }
2855
fc51b1cf 2856 spin_lock(&delegation->lock);
0c116cad 2857 nfs4_stateid_copy(&stateid, &delegation->stateid);
0c116cad 2858
994b15b9
TM		 2859 if (!test_and_clear_bit(NFS_DELEGATION_TEST_EXPIRED,
2860 &delegation->flags)) {
fc51b1cf 2861 spin_unlock(&delegation->lock);
4c8e5447 2862 rcu_read_unlock();
27a30cf6 2863 return NFS_OK;
4c8e5447 2864 }
0c116cad 2865
a52458b4
N		 2866 if (delegation->cred)
2867 cred = get_cred(delegation->cred);
fc51b1cf 2868 spin_unlock(&delegation->lock);
0c116cad 2869 rcu_read_unlock();
4586f6e2 2870 status = nfs41_test_and_free_expired_stateid(server, &stateid, cred);
0c116cad 2871 trace_nfs4_test_delegation_stateid(state, NULL, status);
f7a62ada 2872 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID)
41020b67 2873 nfs_finish_clear_delegation_stateid(state, &stateid);
27a30cf6
TM		 2874 else
2875 ret = status;
ab7cb0df 2876
8c39a39e 2877 put_cred(cred);
27a30cf6
TM		 2878 return ret;
2879}
2880
2881static void nfs41_delegation_recover_stateid(struct nfs4_state *state)
2882{
2883 nfs4_stateid tmp;
2884
2885 if (test_bit(NFS_DELEGATED_STATE, &state->flags) &&
2886 nfs4_copy_delegation_stateid(state->inode, state->state,
2887 &tmp, NULL) &&
2888 nfs4_stateid_match_other(&state->stateid, &tmp))
2889 nfs_state_set_delegation(state, &tmp, state->state);
2890 else
2891 nfs_state_clear_delegation(state);
3e60ffdd
CL		 2892}
2893
c5896fc8
TM		 2894/**
2895 * nfs41_check_expired_locks - possibly free a lock stateid
2896 *
2897 * @state: NFSv4 state for an inode
2898 *
2899 * Returns NFS_OK if recovery for this stateid is now finished.
2900 * Otherwise a negative NFS4ERR value is returned.
2901 */
2902static int nfs41_check_expired_locks(struct nfs4_state *state)
2903{
2904 int status, ret = NFS_OK;
d75a6a0e 2905 struct nfs4_lock_state *lsp, *prev = NULL;
c5896fc8
TM		 2906 struct nfs_server *server = NFS_SERVER(state->inode);
2907
2908 if (!test_bit(LK_STATE_IN_USE, &state->flags))
2909 goto out;
d75a6a0e
BC		 2910
2911 spin_lock(&state->state_lock);
c5896fc8
TM		 2912 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
2913 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
a52458b4 2914 const struct cred *cred = lsp->ls_state->owner->so_cred;
c5896fc8 2915
194bc1f4 2916 refcount_inc(&lsp->ls_count);
d75a6a0e
BC		 2917 spin_unlock(&state->state_lock);
2918
2919 nfs4_put_lock_state(prev);
2920 prev = lsp;
2921
c5896fc8
TM		 2922 status = nfs41_test_and_free_expired_stateid(server,
2923 &lsp->ls_stateid,
2924 cred);
2925 trace_nfs4_test_lock_stateid(state, lsp, status);
2926 if (status == -NFS4ERR_EXPIRED ||
2927 status == -NFS4ERR_BAD_STATEID) {
2928 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
67dd4830 2929 lsp->ls_stateid.type = NFS4_INVALID_STATEID_TYPE;
c5896fc8
TM		 2930 if (!recover_lost_locks)
2931 set_bit(NFS_LOCK_LOST, &lsp->ls_flags);
2932 } else if (status != NFS_OK) {
2933 ret = status;
d75a6a0e
BC		 2934 nfs4_put_lock_state(prev);
2935 goto out;
c5896fc8 2936 }
d75a6a0e 2937 spin_lock(&state->state_lock);
c5896fc8 2938 }
d75a6a0e
BC		 2939 }
2940 spin_unlock(&state->state_lock);
2941 nfs4_put_lock_state(prev);
c5896fc8
TM		 2942out:
2943 return ret;
2944}
2945
3e60ffdd
CL		 2946/**
2947 * nfs41_check_open_stateid - possibly free an open stateid
2948 *
2949 * @state: NFSv4 state for an inode
2950 *
2951 * Returns NFS_OK if recovery for this stateid is now finished.
2952 * Otherwise a negative NFS4ERR value is returned.
2953 */
2954static int nfs41_check_open_stateid(struct nfs4_state *state)
2955{
2956 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 2957 nfs4_stateid *stateid = &state->open_stateid;
a52458b4 2958 const struct cred *cred = state->owner->so_cred;
3e60ffdd
CL		 2959 int status;
2960
27a30cf6 2961 if (test_bit(NFS_OPEN_STATE, &state->flags) == 0)
3e60ffdd 2962 return -NFS4ERR_BAD_STATEID;
4586f6e2 2963 status = nfs41_test_and_free_expired_stateid(server, stateid, cred);
08cb47fa 2964 trace_nfs4_test_open_stateid(state, NULL, status);
f7a62ada 2965 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID) {
27a30cf6 2966 nfs_state_clear_open_state_flags(state);
67dd4830 2967 stateid->type = NFS4_INVALID_STATEID_TYPE;
8a64c4ef 2968 return status;
c0ca0e59 2969 }
8a64c4ef
TM		 2970 if (nfs_open_stateid_recover_openmode(state))
2971 return -NFS4ERR_OPENMODE;
2972 return NFS_OK;
b01dd1d8
BS		 2973}
2974
2975static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2976{
eb64cf96 2977 int status;
b01dd1d8 2978
27a30cf6
TM		 2979 status = nfs41_check_delegation_stateid(state);
2980 if (status != NFS_OK)
2981 return status;
2982 nfs41_delegation_recover_stateid(state);
2983
c5896fc8
TM		 2984 status = nfs41_check_expired_locks(state);
2985 if (status != NFS_OK)
2986 return status;
3e60ffdd 2987 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 2988 if (status != NFS_OK)
2989 status = nfs4_open_expired(sp, state);
2990 return status;
f062eb6c
BS		 2991}
2992#endif
2993
aa53ed54
JL		 2994/*
2995 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2996 * fields corresponding to attributes that were used to store the verifier.
2997 * Make sure we clobber those fields in the later setattr call
2998 */
609339c1 2999static unsigned nfs4_exclusive_attrset(struct nfs4_opendata *opendata,
5334c5bd 3000 struct iattr *sattr, struct nfs4_label **label)
aa53ed54 3001{
609339c1
TM		 3002 const __u32 *bitmask = opendata->o_arg.server->exclcreat_bitmask;
3003 __u32 attrset[3];
3004 unsigned ret;
3005 unsigned i;
5334c5bd 3006
609339c1
TM		 3007 for (i = 0; i < ARRAY_SIZE(attrset); i++) {
3008 attrset[i] = opendata->o_res.attrset[i];
3009 if (opendata->o_arg.createmode == NFS4_CREATE_EXCLUSIVE4_1)
3010 attrset[i] &= ~bitmask[i];
3011 }
3012
3013 ret = (opendata->o_arg.createmode == NFS4_CREATE_EXCLUSIVE) ?
3014 sattr->ia_valid : 0;
aa53ed54 3015
609339c1
TM		 3016 if ((attrset[1] & (FATTR4_WORD1_TIME_ACCESS|FATTR4_WORD1_TIME_ACCESS_SET))) {
3017 if (sattr->ia_valid & ATTR_ATIME_SET)
3018 ret |= ATTR_ATIME_SET;
3019 else
3020 ret |= ATTR_ATIME;
3021 }
5334c5bd 3022
609339c1
TM		 3023 if ((attrset[1] & (FATTR4_WORD1_TIME_MODIFY|FATTR4_WORD1_TIME_MODIFY_SET))) {
3024 if (sattr->ia_valid & ATTR_MTIME_SET)
3025 ret |= ATTR_MTIME_SET;
3026 else
3027 ret |= ATTR_MTIME;
3028 }
5334c5bd 3029
609339c1 3030 if (!(attrset[2] & FATTR4_WORD2_SECURITY_LABEL))
5334c5bd 3031 *label = NULL;
609339c1 3032 return ret;
aa53ed54
JL		 3033}
3034
c21443c2 3035static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
1bf85d8c 3036 int flags, struct nfs_open_context *ctx)
c21443c2
TM		 3037{
3038 struct nfs4_state_owner *sp = opendata->owner;
3039 struct nfs_server *server = sp->so_server;
275bb307 3040 struct dentry *dentry;
c21443c2 3041 struct nfs4_state *state;
1bf85d8c 3042 fmode_t acc_mode = _nfs4_ctx_to_accessmode(ctx);
cf5b4059
TM		 3043 struct inode *dir = d_inode(opendata->dir);
3044 unsigned long dir_verifier;
c21443c2
TM		 3045 unsigned int seq;
3046 int ret;
3047
3048 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
cf5b4059 3049 dir_verifier = nfs_save_change_attribute(dir);
c21443c2 3050
3b65a30d 3051 ret = _nfs4_proc_open(opendata, ctx);
dca78001 3052 if (ret != 0)
c21443c2
TM		 3053 goto out;
3054
ae55e59d 3055 state = _nfs4_opendata_to_nfs4_state(opendata);
c21443c2
TM		 3056 ret = PTR_ERR(state);
3057 if (IS_ERR(state))
3058 goto out;
a974deee 3059 ctx->state = state;
c21443c2
TM		 3060 if (server->caps & NFS_CAP_POSIX_LOCK)
3061 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
a8ce377a
JL		 3062 if (opendata->o_res.rflags & NFS4_OPEN_RESULT_MAY_NOTIFY_LOCK)
3063 set_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags);
c21443c2 3064
275bb307 3065 dentry = opendata->dentry;
2b0143b5 3066 if (d_really_is_negative(dentry)) {
668d0cd5 3067 struct dentry *alias;
275bb307 3068 d_drop(dentry);
668d0cd5
AV		 3069 alias = d_exact_alias(dentry, state->inode);
3070 if (!alias)
3071 alias = d_splice_alias(igrab(state->inode), dentry);
3072 /* d_splice_alias() can't fail here - it's a non-directory */
3073 if (alias) {
275bb307 3074 dput(ctx->dentry);
668d0cd5 3075 ctx->dentry = dentry = alias;
275bb307 3076 }
cf5b4059
TM		 3077 }
3078
3079 switch(opendata->o_arg.claim) {
3080 default:
3081 break;
3082 case NFS4_OPEN_CLAIM_NULL:
3083 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
3084 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
3085 if (!opendata->rpc_done)
3086 break;
3087 if (opendata->o_res.delegation_type != 0)
3088 dir_verifier = nfs_save_change_attribute(dir);
3089 nfs_set_verifier(dentry, dir_verifier);
275bb307
TM		 3090 }
3091
af9b6d75
TM		 3092 /* Parse layoutget results before we check for access */
3093 pnfs_parse_lgopen(state->inode, opendata->lgp, ctx);
3094
1bf85d8c
TM		 3095 ret = nfs4_opendata_access(sp->so_cred, opendata, state,
3096 acc_mode, flags);
c21443c2
TM		 3097 if (ret != 0)
3098 goto out;
3099
2b0143b5 3100 if (d_inode(dentry) == state->inode) {
c45ffdd2
TM		 3101 nfs_inode_attach_open_context(ctx);
3102 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
3103 nfs4_schedule_stateid_recovery(server, state);
3104 }
2409a976 3105
c21443c2 3106out:
0cb98abb
OK		 3107 if (!opendata->cancelled)
3108 nfs4_sequence_free_slot(&opendata->o_res.seq_res);
c21443c2
TM		 3109 return ret;
3110}
3111
1da177e4 3112/*
24ac23ab 3113 * Returns a referenced nfs4_state
1da177e4 3114 */
82be417a 3115static int _nfs4_do_open(struct inode *dir,
4197a055 3116 struct nfs_open_context *ctx,
82be417a 3117 int flags,
8fd1ab74 3118 const struct nfs4_open_createattrs *c,
5bc2afc2 3119 int *opened)
1da177e4
LT		 3120{
3121 struct nfs4_state_owner *sp;
3122 struct nfs4_state *state = NULL;
3123 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 3124 struct nfs4_opendata *opendata;
4197a055 3125 struct dentry *dentry = ctx->dentry;
a52458b4 3126 const struct cred *cred = ctx->cred;
4197a055 3127 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
1bf85d8c 3128 fmode_t fmode = _nfs4_ctx_to_openmode(ctx);
49f9a0fa 3129 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
8fd1ab74
TM		 3130 struct iattr *sattr = c->sattr;
3131 struct nfs4_label *label = c->label;
1775fd3e 3132 struct nfs4_label *olabel = NULL;
aac00a8d 3133 int status;
1da177e4
LT		 3134
3135 /* Protect against reboot recovery conflicts */
1da177e4 3136 status = -ENOMEM;
d1e284d5
TM		 3137 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
3138 if (sp == NULL) {
1da177e4
LT		 3139 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
3140 goto out_err;
3141 }
334f87dd 3142 status = nfs4_client_recover_expired_lease(server->nfs_client);
58d9714a 3143 if (status != 0)
b4454fe1 3144 goto err_put_state_owner;
2b0143b5
DH		 3145 if (d_really_is_positive(dentry))
3146 nfs4_return_incompatible_delegation(d_inode(dentry), fmode);
58d9714a 3147 status = -ENOMEM;
2b0143b5 3148 if (d_really_is_positive(dentry))
49f9a0fa 3149 claim = NFS4_OPEN_CLAIM_FH;
8fd1ab74
TM		 3150 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags,
3151 c, claim, GFP_KERNEL);
e56e0b78 3152 if (opendata == NULL)
95d35cb4 3153 goto err_put_state_owner;
1da177e4 3154
14c43f76
DQ		 3155 if (label) {
3156 olabel = nfs4_label_alloc(server, GFP_KERNEL);
3157 if (IS_ERR(olabel)) {
3158 status = PTR_ERR(olabel);
3159 goto err_opendata_put;
3160 }
3161 }
3162
e911b815
TM		 3163 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
3164 if (!opendata->f_attr.mdsthreshold) {
3165 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
3166 if (!opendata->f_attr.mdsthreshold)
3167 goto err_free_label;
3168 }
1549210f 3169 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 3170 }
2b0143b5
DH		 3171 if (d_really_is_positive(dentry))
3172 opendata->state = nfs4_get_open_state(d_inode(dentry), sp);
aac00a8d 3173
1bf85d8c 3174 status = _nfs4_open_and_get_state(opendata, flags, ctx);
6168f62c 3175 if (status != 0)
14c43f76 3176 goto err_free_label;
3efb9722 3177 state = ctx->state;
6168f62c 3178
efcbc04e 3179 if ((opendata->o_arg.open_flags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) &&
549b19cc 3180 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
609339c1 3181 unsigned attrs = nfs4_exclusive_attrset(opendata, sattr, &label);
a1d1c4f1
TM		 3182 /*
3183 * send create attributes which was not set by open
3184 * with an extra setattr.
3185 */
609339c1
TM		 3186 if (attrs || label) {
3187 unsigned ia_old = sattr->ia_valid;
3188
3189 sattr->ia_valid = attrs;
a1d1c4f1
TM		 3190 nfs_fattr_init(opendata->o_res.f_attr);
3191 status = nfs4_do_setattr(state->inode, cred,
3192 opendata->o_res.f_attr, sattr,
29b59f94 3193 ctx, label, olabel);
a1d1c4f1
TM		 3194 if (status == 0) {
3195 nfs_setattr_update_inode(state->inode, sattr,
3196 opendata->o_res.f_attr);
3197 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
3198 }
609339c1 3199 sattr->ia_valid = ia_old;
1775fd3e 3200 }
0ab64e0e 3201 }
c5c3fb5f 3202 if (opened && opendata->file_created)
73a09dd9 3203 *opened = 1;
82be417a 3204
e911b815 3205 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
82be417a 3206 *ctx_th = opendata->f_attr.mdsthreshold;
e911b815
TM		 3207 opendata->f_attr.mdsthreshold = NULL;
3208 }
82be417a 3209
14c43f76
DQ		 3210 nfs4_label_free(olabel);
3211
c6d00e63 3212 nfs4_opendata_put(opendata);
1da177e4 3213 nfs4_put_state_owner(sp);
1da177e4 3214 return 0;
14c43f76
DQ		 3215err_free_label:
3216 nfs4_label_free(olabel);
c6d00e63
TM		 3217err_opendata_put:
3218 nfs4_opendata_put(opendata);
e56e0b78
TM		 3219err_put_state_owner:
3220 nfs4_put_state_owner(sp);
1da177e4 3221out_err:
1da177e4
LT		 3222 return status;
3223}
3224
3225
82be417a 3226static struct nfs4_state *nfs4_do_open(struct inode *dir,
4197a055 3227 struct nfs_open_context *ctx,
82be417a
AA		 3228 int flags,
3229 struct iattr *sattr,
5bc2afc2
TM		 3230 struct nfs4_label *label,
3231 int *opened)
1da177e4 3232{
49f9a0fa 3233 struct nfs_server *server = NFS_SERVER(dir);
0688e64b
TM		 3234 struct nfs4_exception exception = {
3235 .interruptible = true,
3236 };
1da177e4 3237 struct nfs4_state *res;
8fd1ab74
TM		 3238 struct nfs4_open_createattrs c = {
3239 .label = label,
3240 .sattr = sattr,
3241 .verf = {
3242 [0] = (__u32)jiffies,
3243 [1] = (__u32)current->pid,
3244 },
3245 };
1da177e4
LT		 3246 int status;
3247
3248 do {
8fd1ab74 3249 status = _nfs4_do_open(dir, ctx, flags, &c, opened);
3efb9722 3250 res = ctx->state;
42113a75 3251 trace_nfs4_open_file(ctx, flags, status);
1da177e4
LT		 3252 if (status == 0)
3253 break;
3254 /* NOTE: BAD_SEQID means the server and client disagree about the
3255 * book-keeping w.r.t. state-changing operations
3256 * (OPEN/CLOSE/LOCK/LOCKU...)
3257 * It is actually a sign of a bug on the client or on the server.
3258 *
3259 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 3260 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 3261 * have unhashed the old state_owner for us, and that we can
3262 * therefore safely retry using a new one. We should still warn
3263 * the user though...
3264 */
3265 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 3266 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 3267 " returned a bad sequence-id error!\n",
3268 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 3269 exception.retry = 1;
3270 continue;
3271 }
550f5747
TM		 3272 /*
3273 * BAD_STATEID on OPEN means that the server cancelled our
3274 * state before it received the OPEN_CONFIRM.
3275 * Recover by retrying the request as per the discussion
3276 * on Page 181 of RFC3530.
3277 */
3278 if (status == -NFS4ERR_BAD_STATEID) {
3279 exception.retry = 1;
3280 continue;
3281 }
924491f2
RM		 3282 if (status == -NFS4ERR_EXPIRED) {
3283 nfs4_schedule_lease_recovery(server->nfs_client);
3284 exception.retry = 1;
3285 continue;
3286 }
aac00a8d
TM		 3287 if (status == -EAGAIN) {
3288 /* We must have found a delegation */
3289 exception.retry = 1;
3290 continue;
3291 }
49f9a0fa
TM		 3292 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
3293 continue;
3294 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 3295 status, &exception));
3296 } while (exception.retry);
3297 return res;
3298}
3299
8487c479
TM		 3300static int _nfs4_do_setattr(struct inode *inode,
3301 struct nfs_setattrargs *arg,
3302 struct nfs_setattrres *res,
a52458b4 3303 const struct cred *cred,
29b59f94 3304 struct nfs_open_context *ctx)
1da177e4 3305{
3e4f6290 3306 struct nfs_server *server = NFS_SERVER(inode);
d9b67e1e 3307 struct rpc_message msg = {
659bfcd6 3308 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
8487c479
TM		 3309 .rpc_argp = arg,
3310 .rpc_resp = res,
659bfcd6 3311 .rpc_cred = cred,
d9b67e1e 3312 };
a52458b4 3313 const struct cred *delegation_cred = NULL;
26e976a8 3314 unsigned long timestamp = jiffies;
ee3ae84e 3315 bool truncate;
65e4308d 3316 int status;
1da177e4 3317
8487c479 3318 nfs_fattr_init(res->fattr);
1da177e4 3319
ee3ae84e 3320 /* Servers should only apply open mode checks for file size changes */
8487c479 3321 truncate = (arg->iap->ia_valid & ATTR_SIZE) ? true : false;
644c9f40
CL		 3322 if (!truncate) {
3323 nfs4_inode_make_writeable(inode);
991eedb1 3324 goto zero_stateid;
644c9f40 3325 }
ee3ae84e 3326
991eedb1 3327 if (nfs4_copy_delegation_stateid(inode, FMODE_WRITE, &arg->stateid, &delegation_cred)) {
ee3ae84e 3328 /* Use that stateid */
09a54f0e 3329 } else if (ctx != NULL && ctx->state) {
17393475 3330 struct nfs_lock_context *l_ctx;
29b59f94 3331 if (!nfs4_valid_open_stateid(ctx->state))
0418dae1 3332 return -EBADF;
17393475
N		 3333 l_ctx = nfs_get_lock_context(ctx);
3334 if (IS_ERR(l_ctx))
3335 return PTR_ERR(l_ctx);
7a0566b3
N		 3336 status = nfs4_select_rw_stateid(ctx->state, FMODE_WRITE, l_ctx,
3337 &arg->stateid, &delegation_cred);
3338 nfs_put_lock_context(l_ctx);
3339 if (status == -EIO)
0418dae1 3340 return -EBADF;
d826e5b8
OK		 3341 else if (status == -EAGAIN)
3342 goto zero_stateid;
991eedb1
TM		 3343 } else {
3344zero_stateid:
8487c479 3345 nfs4_stateid_copy(&arg->stateid, &zero_stateid);
991eedb1 3346 }
abf4e13c
TM		 3347 if (delegation_cred)
3348 msg.rpc_cred = delegation_cred;
1da177e4 3349
8487c479 3350 status = nfs4_call_sync(server->client, server, &msg, &arg->seq_args, &res->seq_res, 1);
abf4e13c 3351
a52458b4 3352 put_cred(delegation_cred);
29b59f94 3353 if (status == 0 && ctx != NULL)
26e976a8 3354 renew_lease(server, timestamp);
8487c479 3355 trace_nfs4_setattr(inode, &arg->stateid, status);
65e4308d 3356 return status;
1da177e4
LT		 3357}
3358
a52458b4 3359static int nfs4_do_setattr(struct inode *inode, const struct cred *cred,
659bfcd6 3360 struct nfs_fattr *fattr, struct iattr *sattr,
29b59f94 3361 struct nfs_open_context *ctx, struct nfs4_label *ilabel,
1775fd3e 3362 struct nfs4_label *olabel)
1da177e4 3363{
3e4f6290 3364 struct nfs_server *server = NFS_SERVER(inode);
30846df0 3365 __u32 bitmask[NFS4_BITMASK_SZ];
29b59f94 3366 struct nfs4_state *state = ctx ? ctx->state : NULL;
d9b67e1e
AS		 3367 struct nfs_setattrargs arg = {
3368 .fh = NFS_FH(inode),
3369 .iap = sattr,
8487c479 3370 .server = server,
30846df0 3371 .bitmask = bitmask,
8487c479 3372 .label = ilabel,
d9b67e1e
AS		 3373 };
3374 struct nfs_setattrres res = {
8487c479
TM		 3375 .fattr = fattr,
3376 .label = olabel,
3377 .server = server,
d9b67e1e 3378 };
a1d0b5ee
TM		 3379 struct nfs4_exception exception = {
3380 .state = state,
3114ea7a 3381 .inode = inode,
8487c479 3382 .stateid = &arg.stateid,
a1d0b5ee 3383 };
a71029b8 3384 unsigned long adjust_flags = NFS_INO_INVALID_CHANGE;
1da177e4 3385 int err;
8487c479 3386
720869eb
TM		 3387 if (sattr->ia_valid & (ATTR_MODE | ATTR_KILL_SUID | ATTR_KILL_SGID))
3388 adjust_flags |= NFS_INO_INVALID_MODE;
3389 if (sattr->ia_valid & (ATTR_UID | ATTR_GID))
a71029b8
TM		 3390 adjust_flags |= NFS_INO_INVALID_OTHER;
3391
1da177e4 3392 do {
a71029b8
TM		 3393 nfs4_bitmap_copy_adjust(bitmask, nfs4_bitmask(server, olabel),
3394 inode, adjust_flags);
30846df0 3395
29b59f94 3396 err = _nfs4_do_setattr(inode, &arg, &res, cred, ctx);
451146be
TM		 3397 switch (err) {
3398 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 3399 if (!(sattr->ia_valid & ATTR_SIZE)) {
3400 pr_warn_once("NFSv4: server %s is incorrectly "
3401 "applying open mode checks to "
3402 "a SETATTR that is not "
3403 "changing file size.\n",
3404 server->nfs_client->cl_hostname);
3405 }
451146be
TM		 3406 if (state && !(state->state & FMODE_WRITE)) {
3407 err = -EBADF;
3408 if (sattr->ia_valid & ATTR_OPEN)
3409 err = -EACCES;
3410 goto out;
3411 }
3412 }
3413 err = nfs4_handle_exception(server, err, &exception);
1da177e4 3414 } while (exception.retry);
451146be 3415out:
1da177e4
LT		 3416 return err;
3417}
3418
500d701f
PT		 3419static bool
3420nfs4_wait_on_layoutreturn(struct inode *inode, struct rpc_task *task)
3421{
3422 if (inode == NULL || !nfs_have_layout(inode))
3423 return false;
3424
3425 return pnfs_wait_on_layoutreturn(inode, task);
3426}
3427
0e0cb35b
TM		 3428/*
3429 * Update the seqid of an open stateid
3430 */
3431static void nfs4_sync_open_stateid(nfs4_stateid *dst,
3432 struct nfs4_state *state)
3433{
3434 __be32 seqid_open;
3435 u32 dst_seqid;
3436 int seq;
3437
3438 for (;;) {
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 nfs4_stateid_copy(dst, &state->open_stateid);
3444 if (read_seqretry(&state->seqlock, seq))
3445 continue;
3446 break;
3447 }
3448 seqid_open = state->open_stateid.seqid;
3449 if (read_seqretry(&state->seqlock, seq))
3450 continue;
3451
3452 dst_seqid = be32_to_cpu(dst->seqid);
3453 if ((s32)(dst_seqid - be32_to_cpu(seqid_open)) < 0)
3454 dst->seqid = seqid_open;
3455 break;
3456 }
3457}
3458
3459/*
3460 * Update the seqid of an open stateid after receiving
3461 * NFS4ERR_OLD_STATEID
3462 */
3463static bool nfs4_refresh_open_old_stateid(nfs4_stateid *dst,
3464 struct nfs4_state *state)
3465{
3466 __be32 seqid_open;
3467 u32 dst_seqid;
3468 bool ret;
b4868b44
BC		 3469 int seq, status = -EAGAIN;
3470 DEFINE_WAIT(wait);
0e0cb35b
TM		 3471
3472 for (;;) {
3473 ret = false;
3474 if (!nfs4_valid_open_stateid(state))
3475 break;
3476 seq = read_seqbegin(&state->seqlock);
3477 if (!nfs4_state_match_open_stateid_other(state, dst)) {
3478 if (read_seqretry(&state->seqlock, seq))
3479 continue;
3480 break;
3481 }
b4868b44
BC		 3482
3483 write_seqlock(&state->seqlock);
0e0cb35b 3484 seqid_open = state->open_stateid.seqid;
0e0cb35b
TM		 3485
3486 dst_seqid = be32_to_cpu(dst->seqid);
b4868b44
BC		 3487
3488 /* Did another OPEN bump the state's seqid? try again: */
3489 if ((s32)(be32_to_cpu(seqid_open) - dst_seqid) > 0) {
0e0cb35b 3490 dst->seqid = seqid_open;
b4868b44
BC		 3491 write_sequnlock(&state->seqlock);
3492 ret = true;
3493 break;
3494 }
3495
3496 /* server says we're behind but we haven't seen the update yet */
3497 set_bit(NFS_STATE_CHANGE_WAIT, &state->flags);
3498 prepare_to_wait(&state->waitq, &wait, TASK_KILLABLE);
3499 write_sequnlock(&state->seqlock);
3500 trace_nfs4_close_stateid_update_wait(state->inode, dst, 0);
3501
bb002388 3502 if (fatal_signal_pending(current))
b4868b44
BC		 3503 status = -EINTR;
3504 else
3505 if (schedule_timeout(5*HZ) != 0)
3506 status = 0;
3507
3508 finish_wait(&state->waitq, &wait);
3509
3510 if (!status)
3511 continue;
3512 if (status == -EINTR)
3513 break;
3514
3515 /* we slept the whole 5 seconds, we must have lost a seqid */
3516 dst->seqid = cpu_to_be32(dst_seqid + 1);
0e0cb35b
TM		 3517 ret = true;
3518 break;
3519 }
3520
3521 return ret;
3522}
3523
1da177e4
LT		 3524struct nfs4_closedata {
3525 struct inode *inode;
3526 struct nfs4_state *state;
3527 struct nfs_closeargs arg;
3528 struct nfs_closeres res;
cf805165
TM		 3529 struct {
3530 struct nfs4_layoutreturn_args arg;
3531 struct nfs4_layoutreturn_res res;
4d796d75 3532 struct nfs4_xdr_opaque_data ld_private;
cf805165
TM		 3533 u32 roc_barrier;
3534 bool roc;
3535 } lr;
516a6af6 3536 struct nfs_fattr fattr;
26e976a8 3537 unsigned long timestamp;
1da177e4
LT		 3538};
3539
963d8fe5 3540static void nfs4_free_closedata(void *data)
9512135d 3541{
963d8fe5
TM		 3542 struct nfs4_closedata *calldata = data;
3543 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 3544 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 3545
cf805165 3546 if (calldata->lr.roc)
1c5bd76d
TM		 3547 pnfs_roc_release(&calldata->lr.arg, &calldata->lr.res,
3548 calldata->res.lr_ret);
9512135d
TM		 3549 nfs4_put_open_state(calldata->state);
3550 nfs_free_seqid(calldata->arg.seqid);
9512135d 3551 nfs4_put_state_owner(sp);
322b2b90 3552 nfs_sb_deactive(sb);
9512135d
TM		 3553 kfree(calldata);
3554}
3555
963d8fe5 3556static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 3557{
963d8fe5 3558 struct nfs4_closedata *calldata = data;
1da177e4 3559 struct nfs4_state *state = calldata->state;
1da177e4 3560 struct nfs_server *server = NFS_SERVER(calldata->inode);
412f6c4c 3561 nfs4_stateid *res_stateid = NULL;
b8b8d221
TM		 3562 struct nfs4_exception exception = {
3563 .state = state,
3564 .inode = calldata->inode,
3565 .stateid = &calldata->arg.stateid,
3566 };
1da177e4 3567
a3ca5651 3568 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 3569 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
3570 return;
42113a75 3571 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
cf805165
TM		 3572
3573 /* Handle Layoutreturn errors */
078000d0
TM		 3574 if (pnfs_roc_done(task, &calldata->arg.lr_args, &calldata->res.lr_res,
3575 &calldata->res.lr_ret) == -EAGAIN)
287a9c55 3576 goto out_restart;
cf805165 3577
d9b67e1e 3578 /* hmm. we are done with the inode, and in the process of freeing
1da177e4
LT		 3579 * the state_owner. we keep this around to process errors
3580 */
1da177e4
LT		 3581 switch (task->tk_status) {
3582 case 0:
412f6c4c 3583 res_stateid = &calldata->res.stateid;
26e976a8 3584 renew_lease(server, calldata->timestamp);
412f6c4c 3585 break;
f07d4a31
TM		 3586 case -NFS4ERR_ACCESS:
3587 if (calldata->arg.bitmask != NULL) {
3588 calldata->arg.bitmask = NULL;
3589 calldata->res.fattr = NULL;
91b30d2e 3590 goto out_restart;
f07d4a31
TM		 3591
3592 }
3593 break;
12f275cd
TM		 3594 case -NFS4ERR_OLD_STATEID:
3595 /* Did we race with OPEN? */
0e0cb35b 3596 if (nfs4_refresh_open_old_stateid(&calldata->arg.stateid,
91b30d2e
TM		 3597 state))
3598 goto out_restart;
12f275cd 3599 goto out_release;
69794ad7 3600 case -NFS4ERR_ADMIN_REVOKED:
1da177e4 3601 case -NFS4ERR_STALE_STATEID:
26d36301
TM		 3602 case -NFS4ERR_EXPIRED:
3603 nfs4_free_revoked_stateid(server,
3604 &calldata->arg.stateid,
3605 task->tk_msg.rpc_cred);
df561f66 3606 fallthrough;
9e33bed5 3607 case -NFS4ERR_BAD_STATEID:
e217e825
TM		 3608 if (calldata->arg.fmode == 0)
3609 break;
df561f66 3610 fallthrough;
1da177e4 3611 default:
b8b8d221
TM		 3612 task->tk_status = nfs4_async_handle_exception(task,
3613 server, task->tk_status, &exception);
3614 if (exception.retry)
91b30d2e 3615 goto out_restart;
1da177e4 3616 }
4a1e2feb
TM		 3617 nfs_clear_open_stateid(state, &calldata->arg.stateid,
3618 res_stateid, calldata->arg.fmode);
69794ad7 3619out_release:
91b30d2e 3620 task->tk_status = 0;
72211dbe 3621 nfs_release_seqid(calldata->arg.seqid);
d8d84983 3622 nfs_refresh_inode(calldata->inode, &calldata->fattr);
a3ca5651 3623 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
91b30d2e 3624 return;
91b30d2e
TM		 3625out_restart:
3626 task->tk_status = 0;
3627 rpc_restart_call_prepare(task);
3628 goto out_release;
1da177e4
LT		 3629}
3630
4ce70ada 3631static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 3632{
4ce70ada 3633 struct nfs4_closedata *calldata = data;
9512135d 3634 struct nfs4_state *state = calldata->state;
7fdab069 3635 struct inode *inode = calldata->inode;
332d1a03 3636 struct nfs_server *server = NFS_SERVER(inode);
c8bf7073 3637 struct pnfs_layout_hdr *lo;
aee7af35 3638 bool is_rdonly, is_wronly, is_rdwr;
88069f77 3639 int call_close = 0;
9512135d 3640
a3ca5651 3641 dprintk("%s: begin!\n", __func__);
963d8fe5 3642 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 3643 goto out_wait;
003707c7 3644
88069f77 3645 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
4cecb76f 3646 spin_lock(&state->owner->so_lock);
aee7af35
TM		 3647 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
3648 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
3649 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
003707c7 3650 /* Calculate the change in open mode */
cd9288ff 3651 calldata->arg.fmode = 0;
e7616923 3652 if (state->n_rdwr == 0) {
cd9288ff
TM		 3653 if (state->n_rdonly == 0)
3654 call_close |= is_rdonly;
3655 else if (is_rdonly)
3656 calldata->arg.fmode |= FMODE_READ;
3657 if (state->n_wronly == 0)
3658 call_close |= is_wronly;
3659 else if (is_wronly)
3660 calldata->arg.fmode |= FMODE_WRITE;
e547f262
TM		 3661 if (calldata->arg.fmode != (FMODE_READ|FMODE_WRITE))
3662 call_close |= is_rdwr;
cd9288ff
TM		 3663 } else if (is_rdwr)
3664 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
3665
0e0cb35b
TM		 3666 nfs4_sync_open_stateid(&calldata->arg.stateid, state);
3667 if (!nfs4_valid_open_stateid(state))
5d422301 3668 call_close = 0;
4cecb76f 3669 spin_unlock(&state->owner->so_lock);
88069f77
TM		 3670
3671 if (!call_close) {
963d8fe5 3672 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 3673 goto out_no_action;
9512135d 3674 }
88069f77 3675
1c5bd76d 3676 if (!calldata->lr.roc && nfs4_wait_on_layoutreturn(inode, task)) {
500d701f
PT		 3677 nfs_release_seqid(calldata->arg.seqid);
3678 goto out_wait;
3679 }
3680
c8bf7073
TM		 3681 lo = calldata->arg.lr_args ? calldata->arg.lr_args->layout : NULL;
3682 if (lo && !pnfs_layout_is_valid(lo)) {
3683 calldata->arg.lr_args = NULL;
3684 calldata->res.lr_res = NULL;
3685 }
3686
9413a1a1 3687 if (calldata->arg.fmode == 0)
88069f77 3688 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
3ecefc92 3689
9413a1a1 3690 if (calldata->arg.fmode == 0 || calldata->arg.fmode == FMODE_READ) {
3ecefc92 3691 /* Close-to-open cache consistency revalidation */
76bd5c01 3692 if (!nfs4_have_delegation(inode, FMODE_READ)) {
332d1a03
TM		 3693 nfs4_bitmask_set(calldata->arg.bitmask_store,
3694 server->cache_consistency_bitmask,
3695 inode, server, NULL);
3696 calldata->arg.bitmask = calldata->arg.bitmask_store;
76bd5c01 3697 } else
3ecefc92
TM		 3698 calldata->arg.bitmask = NULL;
3699 }
3c13cb5b 3700
6ae37339
TM		 3701 calldata->arg.share_access =
3702 nfs4_map_atomic_open_share(NFS_SERVER(inode),
3703 calldata->arg.fmode, 0);
88069f77 3704
d8d84983
TM		 3705 if (calldata->res.fattr == NULL)
3706 calldata->arg.bitmask = NULL;
3707 else if (calldata->arg.bitmask == NULL)
3708 calldata->res.fattr = NULL;
26e976a8 3709 calldata->timestamp = jiffies;
42e1cca7 3710 if (nfs4_setup_sequence(NFS_SERVER(inode)->nfs_client,
9d12b216
TM		 3711 &calldata->arg.seq_args,
3712 &calldata->res.seq_res,
2240a9e2
TM		 3713 task) != 0)
3714 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 3715 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 3716 return;
3717out_no_action:
3718 task->tk_action = NULL;
3719out_wait:
3720 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 3721}
3722
963d8fe5 3723static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 3724 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 3725 .rpc_call_done = nfs4_close_done,
3726 .rpc_release = nfs4_free_closedata,
3727};
3728
1da177e4
LT		 3729/*
3730 * It is possible for data to be read/written from a mem-mapped file
3731 * after the sys_close call (which hits the vfs layer as a flush).
3732 * This means that we can't safely call nfsv4 close on a file until
3733 * the inode is cleared. This in turn means that we are not good
3734 * NFSv4 citizens - we do not indicate to the server to update the file's
3735 * share state even when we are done with one of the three share
3736 * stateid's in the inode.
3737 *
3738 * NOTE: Caller must be holding the sp->so_owner semaphore!
3739 */
1f7977c1 3740int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 3741{
4a35bd41 3742 struct nfs_server *server = NFS_SERVER(state->inode);
63f5f796 3743 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
1da177e4 3744 struct nfs4_closedata *calldata;
b39e625b
TM		 3745 struct nfs4_state_owner *sp = state->owner;
3746 struct rpc_task *task;
5138fde0
TM		 3747 struct rpc_message msg = {
3748 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
3749 .rpc_cred = state->owner->so_cred,
3750 };
c970aa85
TM		 3751 struct rpc_task_setup task_setup_data = {
3752 .rpc_client = server->client,
5138fde0 3753 .rpc_message = &msg,
c970aa85 3754 .callback_ops = &nfs4_close_ops,
101070ca 3755 .workqueue = nfsiod_workqueue,
61296507 3756 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF,
c970aa85 3757 };
9512135d 3758 int status = -ENOMEM;
1da177e4 3759
85e39fee
OK		 3760 if (server->nfs_client->cl_minorversion)
3761 task_setup_data.flags |= RPC_TASK_MOVEABLE;
3762
fa940720
WAA		 3763 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
3764 &task_setup_data.rpc_client, &msg);
3765
8535b2be 3766 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 3767 if (calldata == NULL)
9512135d 3768 goto out;
fba83f34 3769 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1, 0);
4a35bd41 3770 calldata->inode = state->inode;
1da177e4 3771 calldata->state = state;
4a35bd41 3772 calldata->arg.fh = NFS_FH(state->inode);
c82bac6f
TM		 3773 if (!nfs4_copy_open_stateid(&calldata->arg.stateid, state))
3774 goto out_free_calldata;
1da177e4 3775 /* Serialization for the sequence id */
63f5f796
TM		 3776 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
3777 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask);
badc76dd 3778 if (IS_ERR(calldata->arg.seqid))
9512135d 3779 goto out_free_calldata;
d8d84983 3780 nfs_fattr_init(&calldata->fattr);
dc0b027d 3781 calldata->arg.fmode = 0;
4d796d75 3782 calldata->lr.arg.ld_private = &calldata->lr.ld_private;
516a6af6 3783 calldata->res.fattr = &calldata->fattr;
c1d51931 3784 calldata->res.seqid = calldata->arg.seqid;
516a6af6 3785 calldata->res.server = server;
cf805165 3786 calldata->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
1c5bd76d
TM		 3787 calldata->lr.roc = pnfs_roc(state->inode,
3788 &calldata->lr.arg, &calldata->lr.res, msg.rpc_cred);
3789 if (calldata->lr.roc) {
3790 calldata->arg.lr_args = &calldata->lr.arg;
3791 calldata->res.lr_res = &calldata->lr.res;
3792 }
643168c2 3793 nfs_sb_active(calldata->inode->i_sb);
9512135d 3794
1174dd1f
TM		 3795 msg.rpc_argp = &calldata->arg;
3796 msg.rpc_resp = &calldata->res;
c970aa85
TM		 3797 task_setup_data.callback_data = calldata;
3798 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 3799 if (IS_ERR(task))
3800 return PTR_ERR(task);
a49c3c77
TM		 3801 status = 0;
3802 if (wait)
3803 status = rpc_wait_for_completion_task(task);
b39e625b 3804 rpc_put_task(task);
a49c3c77 3805 return status;
9512135d
TM		 3806out_free_calldata:
3807 kfree(calldata);
3808out:
b39e625b
TM		 3809 nfs4_put_open_state(state);
3810 nfs4_put_state_owner(sp);
9512135d 3811 return status;
1da177e4
LT		 3812}
3813
2b484297 3814static struct inode *
5bc2afc2
TM		 3815nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
3816 int open_flags, struct iattr *attr, int *opened)
1da177e4 3817{
1da177e4 3818 struct nfs4_state *state;
aa9c2669
DQ		 3819 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
3820
3821 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
1da177e4 3822
565277f6 3823 /* Protect against concurrent sillydeletes */
5bc2afc2 3824 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
aa9c2669
DQ		 3825
3826 nfs4_label_release_security(label);
3827
f46e0bd3
TM		 3828 if (IS_ERR(state))
3829 return ERR_CAST(state);
275bb307 3830 return state->inode;
1da177e4
LT		 3831}
3832
1185a552 3833static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 3834{
3835 if (ctx->state == NULL)
3836 return;
3837 if (is_sync)
1bf85d8c 3838 nfs4_close_sync(ctx->state, _nfs4_ctx_to_openmode(ctx));
7fe5c398 3839 else
1bf85d8c 3840 nfs4_close_state(ctx->state, _nfs4_ctx_to_openmode(ctx));
7fe5c398 3841}
1da177e4 3842
b944dba3
TM		 3843#define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
3844#define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
b78ef845 3845#define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_XATTR_SUPPORT - 1UL)
b944dba3 3846
1da177e4
LT		 3847static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
3848{
8c61282f 3849 u32 bitmask[3] = {}, minorversion = server->nfs_client->cl_minorversion;
43652ad5
BH		 3850 struct nfs4_server_caps_arg args = {
3851 .fhandle = fhandle,
8c61282f 3852 .bitmask = bitmask,
43652ad5 3853 };
1da177e4
LT		 3854 struct nfs4_server_caps_res res = {};
3855 struct rpc_message msg = {
3856 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 3857 .rpc_argp = &args,
1da177e4
LT		 3858 .rpc_resp = &res,
3859 };
3860 int status;
f4b23de3 3861 int i;
1da177e4 3862
8c61282f
KM		 3863 bitmask[0] = FATTR4_WORD0_SUPPORTED_ATTRS |
3864 FATTR4_WORD0_FH_EXPIRE_TYPE |
3865 FATTR4_WORD0_LINK_SUPPORT |
3866 FATTR4_WORD0_SYMLINK_SUPPORT |
3867 FATTR4_WORD0_ACLSUPPORT;
3868 if (minorversion)
3869 bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3870
7c513058 3871 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3872 if (status == 0) {
b944dba3 3873 /* Sanity check the server answers */
8c61282f 3874 switch (minorversion) {
b944dba3
TM		 3875 case 0:
3876 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
3877 res.attr_bitmask[2] = 0;
3878 break;
3879 case 1:
3880 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
3881 break;
3882 case 2:
3883 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
3884 }
1da177e4 3885 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
ce62b114
TM		 3886 server->caps &= ~(NFS_CAP_ACLS | NFS_CAP_HARDLINKS |
3887 NFS_CAP_SYMLINKS| NFS_CAP_SECURITY_LABEL);
3888 server->fattr_valid = NFS_ATTR_FATTR_V4;
7dd7d959
MN		 3889 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
3890 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
1da177e4
LT		 3891 server->caps |= NFS_CAP_ACLS;
3892 if (res.has_links != 0)
3893 server->caps |= NFS_CAP_HARDLINKS;
3894 if (res.has_symlinks != 0)
3895 server->caps |= NFS_CAP_SYMLINKS;
0b4f132b
SM		 3896#ifdef CONFIG_NFS_V4_SECURITY_LABEL
3897 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
3898 server->caps |= NFS_CAP_SECURITY_LABEL;
3899#endif
90d98ad8
OK		 3900 if (res.attr_bitmask[0] & FATTR4_WORD0_FS_LOCATIONS)
3901 server->caps |= NFS_CAP_FS_LOCATIONS;
ce62b114
TM		 3902 if (!(res.attr_bitmask[0] & FATTR4_WORD0_FILEID))
3903 server->fattr_valid &= ~NFS_ATTR_FATTR_FILEID;
3904 if (!(res.attr_bitmask[1] & FATTR4_WORD1_MODE))
3905 server->fattr_valid &= ~NFS_ATTR_FATTR_MODE;
3906 if (!(res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS))
3907 server->fattr_valid &= ~NFS_ATTR_FATTR_NLINK;
3908 if (!(res.attr_bitmask[1] & FATTR4_WORD1_OWNER))
3909 server->fattr_valid &= ~(NFS_ATTR_FATTR_OWNER |
3910 NFS_ATTR_FATTR_OWNER_NAME);
3911 if (!(res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP))
3912 server->fattr_valid &= ~(NFS_ATTR_FATTR_GROUP |
3913 NFS_ATTR_FATTR_GROUP_NAME);
3914 if (!(res.attr_bitmask[1] & FATTR4_WORD1_SPACE_USED))
3915 server->fattr_valid &= ~NFS_ATTR_FATTR_SPACE_USED;
3916 if (!(res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS))
3917 server->fattr_valid &= ~NFS_ATTR_FATTR_ATIME;
3918 if (!(res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA))
3919 server->fattr_valid &= ~NFS_ATTR_FATTR_CTIME;
3920 if (!(res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY))
3921 server->fattr_valid &= ~NFS_ATTR_FATTR_MTIME;
aa9c2669
DQ		 3922 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
3923 sizeof(server->attr_bitmask));
b944dba3 3924 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
62ab460c 3925
a65318bf
TM		 3926 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
3927 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
3928 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
b944dba3 3929 server->cache_consistency_bitmask[2] = 0;
f4b23de3
TM		 3930
3931 /* Avoid a regression due to buggy server */
3932 for (i = 0; i < ARRAY_SIZE(res.exclcreat_bitmask); i++)
3933 res.exclcreat_bitmask[i] &= res.attr_bitmask[i];
8c61282f
KM		 3934 memcpy(server->exclcreat_bitmask, res.exclcreat_bitmask,
3935 sizeof(server->exclcreat_bitmask));
f4b23de3 3936
1da177e4 3937 server->acl_bitmask = res.acl_bitmask;
264e6351 3938 server->fh_expire_type = res.fh_expire_type;
1da177e4 3939 }
cccef3b9 3940
1da177e4
LT		 3941 return status;
3942}
3943
55a97593 3944int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4 3945{
0688e64b
TM		 3946 struct nfs4_exception exception = {
3947 .interruptible = true,
3948 };
1da177e4
LT		 3949 int err;
3950 do {
3951 err = nfs4_handle_exception(server,
3952 _nfs4_server_capabilities(server, fhandle),
3953 &exception);
3954 } while (exception.retry);
3955 return err;
3956}
3957
bdab4fd5
OK		 3958static int _nfs4_discover_trunking(struct nfs_server *server,
3959 struct nfs_fh *fhandle)
3960{
3961 struct nfs4_fs_locations *locations = NULL;
3962 struct page *page;
3963 const struct cred *cred;
3964 struct nfs_client *clp = server->nfs_client;
3965 const struct nfs4_state_maintenance_ops *ops =
3966 clp->cl_mvops->state_renewal_ops;
3967 int status = -ENOMEM;
3968
3969 cred = ops->get_state_renewal_cred(clp);
3970 if (cred == NULL) {
3971 cred = nfs4_get_clid_cred(clp);
3972 if (cred == NULL)
3973 return -ENOKEY;
3974 }
3975
3976 page = alloc_page(GFP_KERNEL);
3977 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3978 if (page == NULL || locations == NULL)
3979 goto out;
3980
3981 status = nfs4_proc_get_locations(server, fhandle, locations, page,
3982 cred);
3983 if (status)
3984 goto out;
3985out:
3986 if (page)
3987 __free_page(page);
3988 kfree(locations);
3989 return status;
3990}
3991
3992static int nfs4_discover_trunking(struct nfs_server *server,
3993 struct nfs_fh *fhandle)
3994{
3995 struct nfs4_exception exception = {
3996 .interruptible = true,
3997 };
3998 struct nfs_client *clp = server->nfs_client;
3999 int err = 0;
4000
4001 if (!nfs4_has_session(clp))
4002 goto out;
4003 do {
4004 err = nfs4_handle_exception(server,
4005 _nfs4_discover_trunking(server, fhandle),
4006 &exception);
4007 } while (exception.retry);
4008out:
4009 return err;
4010}
4011
1da177e4
LT		 4012static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
4013 struct nfs_fsinfo *info)
4014{
aa9c2669 4015 u32 bitmask[3];
1da177e4 4016 struct nfs4_lookup_root_arg args = {
aa9c2669 4017 .bitmask = bitmask,
1da177e4
LT		 4018 };
4019 struct nfs4_lookup_res res = {
4020 .server = server,
0e574af1 4021 .fattr = info->fattr,
1da177e4
LT		 4022 .fh = fhandle,
4023 };
4024 struct rpc_message msg = {
4025 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
4026 .rpc_argp = &args,
4027 .rpc_resp = &res,
4028 };
008f55d0 4029
aa9c2669
DQ		 4030 bitmask[0] = nfs4_fattr_bitmap[0];
4031 bitmask[1] = nfs4_fattr_bitmap[1];
4032 /*
4033 * Process the label in the upcoming getfattr
4034 */
4035 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
4036
0e574af1 4037 nfs_fattr_init(info->fattr);
7c513058 4038 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4039}
4040
4041static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
4042 struct nfs_fsinfo *info)
4043{
0688e64b
TM		 4044 struct nfs4_exception exception = {
4045 .interruptible = true,
4046 };
1da177e4
LT		 4047 int err;
4048 do {
fb8a5ba8 4049 err = _nfs4_lookup_root(server, fhandle, info);
b5f875a9 4050 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
fb8a5ba8
BS		 4051 switch (err) {
4052 case 0:
4053 case -NFS4ERR_WRONGSEC:
05e9cfb4 4054 goto out;
fb8a5ba8
BS		 4055 default:
4056 err = nfs4_handle_exception(server, err, &exception);
4057 }
1da177e4 4058 } while (exception.retry);
05e9cfb4 4059out:
1da177e4
LT		 4060 return err;
4061}
4062
8f70e95f
BS		 4063static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
4064 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
4065{
c2190661
TM		 4066 struct rpc_auth_create_args auth_args = {
4067 .pseudoflavor = flavor,
4068 };
8f70e95f 4069 struct rpc_auth *auth;
8f70e95f 4070
c2190661 4071 auth = rpcauth_create(&auth_args, server->client);
9df1336c
AS		 4072 if (IS_ERR(auth))
4073 return -EACCES;
4074 return nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 4075}
4076
9a744ba3
CL		 4077/*
4078 * Retry pseudoroot lookup with various security flavors. We do this when:
4079 *
4080 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
4081 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
4082 *
4083 * Returns zero on success, or a negative NFS4ERR value, or a
4084 * negative errno value.
4085 */
801a16dc 4086static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 4087 struct nfs_fsinfo *info)
1da177e4 4088{
9a744ba3
CL		 4089 /* Per 3530bis 15.33.5 */
4090 static const rpc_authflavor_t flav_array[] = {
4091 RPC_AUTH_GSS_KRB5P,
4092 RPC_AUTH_GSS_KRB5I,
4093 RPC_AUTH_GSS_KRB5,
c4eafe11 4094 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 4095 RPC_AUTH_NULL,
4096 };
4097 int status = -EPERM;
4098 size_t i;
6a1a1e34 4099
4d4b69dd
WAA		 4100 if (server->auth_info.flavor_len > 0) {
4101 /* try each flavor specified by user */
4102 for (i = 0; i < server->auth_info.flavor_len; i++) {
4103 status = nfs4_lookup_root_sec(server, fhandle, info,
4104 server->auth_info.flavors[i]);
4105 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
4106 continue;
4107 break;
4108 }
4109 } else {
4110 /* no flavors specified by user, try default list */
4111 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
4112 status = nfs4_lookup_root_sec(server, fhandle, info,
4113 flav_array[i]);
4114 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
4115 continue;
4116 break;
4117 }
8f70e95f 4118 }
9a744ba3 4119
fb8a5ba8 4120 /*
d3787af2 4121 * -EACCES could mean that the user doesn't have correct permissions
fb8a5ba8
BS		 4122 * to access the mount. It could also mean that we tried to mount
4123 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
4124 * existing mount programs don't handle -EACCES very well so it should
4125 * be mapped to -EPERM instead.
4126 */
4127 if (status == -EACCES)
4128 status = -EPERM;
801a16dc
BS		 4129 return status;
4130}
4131
2ed4b95b
CL		 4132/**
4133 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
4134 * @server: initialized nfs_server handle
4135 * @fhandle: we fill in the pseudo-fs root file handle
4136 * @info: we fill in an FSINFO struct
5e6b1990 4137 * @auth_probe: probe the auth flavours
2ed4b95b
CL		 4138 *
4139 * Returns zero on success, or a negative errno.
801a16dc 4140 */
3028eb2b 4141int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
5e6b1990
TM		 4142 struct nfs_fsinfo *info,
4143 bool auth_probe)
801a16dc 4144{
c7757074 4145 int status = 0;
2ed4b95b 4146
c7757074 4147 if (!auth_probe)
5e6b1990 4148 status = nfs4_lookup_root(server, fhandle, info);
c7757074
AP		 4149
4150 if (auth_probe || status == NFS4ERR_WRONGSEC)
698c937b
TM		 4151 status = server->nfs_client->cl_mvops->find_root_sec(server,
4152 fhandle, info);
2ed4b95b 4153
1da177e4
LT		 4154 if (status == 0)
4155 status = nfs4_server_capabilities(server, fhandle);
4156 if (status == 0)
4157 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 4158
c12e87f4 4159 return nfs4_map_errors(status);
1da177e4
LT		 4160}
4161
bae36241
BS		 4162static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
4163 struct nfs_fsinfo *info)
4164{
4165 int error;
4166 struct nfs_fattr *fattr = info->fattr;
779df6a5 4167 struct nfs4_label *label = fattr->label;
bae36241
BS		 4168
4169 error = nfs4_server_capabilities(server, mntfh);
4170 if (error < 0) {
4171 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
4172 return error;
4173 }
4174
a841b54d 4175 error = nfs4_proc_getattr(server, mntfh, fattr, label, NULL);
bae36241
BS		 4176 if (error < 0) {
4177 dprintk("nfs4_get_root: getattr error = %d\n", -error);
779df6a5 4178 goto out;
bae36241
BS		 4179 }
4180
4181 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
4182 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
4183 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
4184
779df6a5 4185out:
bae36241
BS		 4186 return error;
4187}
4188
6b97fd3d
MN		 4189/*
4190 * Get locations and (maybe) other attributes of a referral.
4191 * Note that we'll actually follow the referral later when
4192 * we detect fsid mismatch in inode revalidation
4193 */
f05d147f
BS		 4194static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
4195 const struct qstr *name, struct nfs_fattr *fattr,
4196 struct nfs_fh *fhandle)
6b97fd3d
MN		 4197{
4198 int status = -ENOMEM;
4199 struct page *page = NULL;
4200 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 4201
4202 page = alloc_page(GFP_KERNEL);
4203 if (page == NULL)
4204 goto out;
4205 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
4206 if (locations == NULL)
4207 goto out;
4208
f05d147f 4209 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 4210 if (status != 0)
4211 goto out;
519ae255
CL		 4212
4213 /*
4214 * If the fsid didn't change, this is a migration event, not a
4215 * referral. Cause us to drop into the exception handler, which
4216 * will kick off migration recovery.
4217 */
6b97fd3d 4218 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 4219 dprintk("%s: server did not return a different fsid for"
4220 " a referral at %s\n", __func__, name->name);
519ae255 4221 status = -NFS4ERR_MOVED;
6b97fd3d
MN		 4222 goto out;
4223 }
533eb461
AA		 4224 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
4225 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 4226
533eb461 4227 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 4228 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 4229 memset(fhandle, 0, sizeof(struct nfs_fh));
4230out:
4231 if (page)
4232 __free_page(page);
5d7ca35a 4233 kfree(locations);
6b97fd3d
MN		 4234 return status;
4235}
4236
1775fd3e 4237static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
a841b54d
TM		 4238 struct nfs_fattr *fattr, struct nfs4_label *label,
4239 struct inode *inode)
1da177e4 4240{
771734f2 4241 __u32 bitmask[NFS4_BITMASK_SZ];
1da177e4
LT		 4242 struct nfs4_getattr_arg args = {
4243 .fh = fhandle,
771734f2 4244 .bitmask = bitmask,
1da177e4
LT		 4245 };
4246 struct nfs4_getattr_res res = {
4247 .fattr = fattr,
1775fd3e 4248 .label = label,
1da177e4
LT		 4249 .server = server,
4250 };
4251 struct rpc_message msg = {
4252 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
4253 .rpc_argp = &args,
4254 .rpc_resp = &res,
4255 };
c74dfe97
TM		 4256 unsigned short task_flags = 0;
4257
85e39fee
OK		 4258 if (nfs4_has_session(server->nfs_client))
4259 task_flags = RPC_TASK_MOVEABLE;
4260
c74dfe97
TM		 4261 /* Is this is an attribute revalidation, subject to softreval? */
4262 if (inode && (server->flags & NFS_MOUNT_SOFTREVAL))
4263 task_flags |= RPC_TASK_TIMEOUT;
aa9c2669 4264
a71029b8 4265 nfs4_bitmap_copy_adjust(bitmask, nfs4_bitmask(server, label), inode, 0);
0e574af1 4266 nfs_fattr_init(fattr);
c74dfe97
TM		 4267 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0);
4268 return nfs4_do_call_sync(server->client, server, &msg,
4269 &args.seq_args, &res.seq_res, task_flags);
1da177e4
LT		 4270}
4271
ec4b0925 4272int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
a841b54d
TM		 4273 struct nfs_fattr *fattr, struct nfs4_label *label,
4274 struct inode *inode)
1da177e4 4275{
0688e64b
TM		 4276 struct nfs4_exception exception = {
4277 .interruptible = true,
4278 };
1da177e4
LT		 4279 int err;
4280 do {
a841b54d 4281 err = _nfs4_proc_getattr(server, fhandle, fattr, label, inode);
b5f875a9
TM		 4282 trace_nfs4_getattr(server, fhandle, fattr, err);
4283 err = nfs4_handle_exception(server, err,
1da177e4
LT		 4284 &exception);
4285 } while (exception.retry);
4286 return err;
4287}
4288
4289/*
4290 * The file is not closed if it is opened due to the a request to change
4291 * the size of the file. The open call will not be needed once the
4292 * VFS layer lookup-intents are implemented.
4293 *
4294 * Close is called when the inode is destroyed.
4295 * If we haven't opened the file for O_WRONLY, we
4296 * need to in the size_change case to obtain a stateid.
4297 *
4298 * Got race?
4299 * Because OPEN is always done by name in nfsv4, it is
4300 * possible that we opened a different file by the same
4301 * name. We can recognize this race condition, but we
4302 * can't do anything about it besides returning an error.
4303 *
4304 * This will be fixed with VFS changes (lookup-intent).
4305 */
4306static int
4307nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
4308 struct iattr *sattr)
4309{
2b0143b5 4310 struct inode *inode = d_inode(dentry);
a52458b4 4311 const struct cred *cred = NULL;
29b59f94 4312 struct nfs_open_context *ctx = NULL;
14c43f76 4313 struct nfs4_label *label = NULL;
1da177e4
LT		 4314 int status;
4315
88ac815c
PT		 4316 if (pnfs_ld_layoutret_on_setattr(inode) &&
4317 sattr->ia_valid & ATTR_SIZE &&
4318 sattr->ia_size < i_size_read(inode))
24028672 4319 pnfs_commit_and_return_layout(inode);
8a1636c4 4320
0e574af1 4321 nfs_fattr_init(fattr);
1da177e4 4322
2669940d
AA		 4323 /* Deal with open(O_TRUNC) */
4324 if (sattr->ia_valid & ATTR_OPEN)
cc7936f9 4325 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2669940d
AA		 4326
4327 /* Optimization: if the end result is no change, don't RPC */
cc7936f9 4328 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2669940d
AA		 4329 return 0;
4330
d530838b 4331 /* Search for an existing open(O_WRITE) file */
659bfcd6 4332 if (sattr->ia_valid & ATTR_FILE) {
659bfcd6
TM		 4333
4334 ctx = nfs_file_open_context(sattr->ia_file);
29b59f94 4335 if (ctx)
504e5189 4336 cred = ctx->cred;
659bfcd6 4337 }
08e9eac4 4338
14c43f76
DQ		 4339 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
4340 if (IS_ERR(label))
4341 return PTR_ERR(label);
4342
199366f0
TM		 4343 /* Return any delegations if we're going to change ACLs */
4344 if ((sattr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0)
c01d3645 4345 nfs4_inode_make_writeable(inode);
199366f0 4346
29b59f94 4347 status = nfs4_do_setattr(inode, cred, fattr, sattr, ctx, NULL, label);
aa9c2669 4348 if (status == 0) {
f044636d 4349 nfs_setattr_update_inode(inode, sattr, fattr);
aa9c2669
DQ		 4350 nfs_setsecurity(inode, fattr, label);
4351 }
14c43f76 4352 nfs4_label_free(label);
1da177e4
LT		 4353 return status;
4354}
4355
0c2e53f1 4356static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
f7b37b8b 4357 struct dentry *dentry, struct nfs_fh *fhandle,
1775fd3e 4358 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 4359{
0c2e53f1 4360 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 4361 int status;
4362 struct nfs4_lookup_arg args = {
4363 .bitmask = server->attr_bitmask,
0c2e53f1 4364 .dir_fh = NFS_FH(dir),
f7b37b8b 4365 .name = &dentry->d_name,
2b3de441
DH		 4366 };
4367 struct nfs4_lookup_res res = {
4368 .server = server,
4369 .fattr = fattr,
aa9c2669 4370 .label = label,
2b3de441
DH		 4371 .fh = fhandle,
4372 };
4373 struct rpc_message msg = {
4374 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
4375 .rpc_argp = &args,
4376 .rpc_resp = &res,
4377 };
f7b37b8b
TM		 4378 unsigned short task_flags = 0;
4379
85e39fee
OK		 4380 if (server->nfs_client->cl_minorversion)
4381 task_flags = RPC_TASK_MOVEABLE;
4382
f7b37b8b
TM		 4383 /* Is this is an attribute revalidation, subject to softreval? */
4384 if (nfs_lookup_is_soft_revalidate(dentry))
4385 task_flags |= RPC_TASK_TIMEOUT;
2b3de441 4386
aa9c2669
DQ		 4387 args.bitmask = nfs4_bitmask(server, label);
4388
2b3de441
DH		 4389 nfs_fattr_init(fattr);
4390
f7b37b8b
TM		 4391 dprintk("NFS call lookup %pd2\n", dentry);
4392 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0);
4393 status = nfs4_do_call_sync(clnt, server, &msg,
4394 &args.seq_args, &res.seq_res, task_flags);
1da177e4
LT		 4395 dprintk("NFS reply lookup: %d\n", status);
4396 return status;
4397}
4398
72de53ec 4399static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 4400{
7ebb9315 4401 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 4402 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 4403 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4404 fattr->nlink = 2;
4405}
4406
72de53ec 4407static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
f7b37b8b 4408 struct dentry *dentry, struct nfs_fh *fhandle,
1775fd3e 4409 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4 4410{
0688e64b
TM		 4411 struct nfs4_exception exception = {
4412 .interruptible = true,
4413 };
72de53ec 4414 struct rpc_clnt *client = *clnt;
f7b37b8b 4415 const struct qstr *name = &dentry->d_name;
1da177e4
LT		 4416 int err;
4417 do {
f7b37b8b 4418 err = _nfs4_proc_lookup(client, dir, dentry, fhandle, fattr, label);
078ea3df 4419 trace_nfs4_lookup(dir, name, err);
72de53ec 4420 switch (err) {
08ef7bd3 4421 case -NFS4ERR_BADNAME:
72de53ec
BS		 4422 err = -ENOENT;
4423 goto out;
0c2e53f1 4424 case -NFS4ERR_MOVED:
f05d147f 4425 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
c86c90c6
DM		 4426 if (err == -NFS4ERR_MOVED)
4427 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
72de53ec 4428 goto out;
0c2e53f1 4429 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 4430 err = -EPERM;
4431 if (client != *clnt)
4432 goto out;
66b06860 4433 client = nfs4_negotiate_security(client, dir, name);
72de53ec
BS		 4434 if (IS_ERR(client))
4435 return PTR_ERR(client);
4436
4437 exception.retry = 1;
4438 break;
4439 default:
4440 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 4441 }
1da177e4 4442 } while (exception.retry);
72de53ec
BS		 4443
4444out:
4445 if (err == 0)
4446 *clnt = client;
4447 else if (client != *clnt)
4448 rpc_shutdown_client(client);
4449
1da177e4
LT		 4450 return err;
4451}
4452
f7b37b8b 4453static int nfs4_proc_lookup(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 4454 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
4455 struct nfs4_label *label)
72de53ec
BS		 4456{
4457 int status;
4458 struct rpc_clnt *client = NFS_CLIENT(dir);
4459
f7b37b8b 4460 status = nfs4_proc_lookup_common(&client, dir, dentry, fhandle, fattr, label);
72de53ec
BS		 4461 if (client != NFS_CLIENT(dir)) {
4462 rpc_shutdown_client(client);
4463 nfs_fixup_secinfo_attributes(fattr);
4464 }
4465 return status;
4466}
4467
f05d147f 4468struct rpc_clnt *
f7b37b8b 4469nfs4_proc_lookup_mountpoint(struct inode *dir, struct dentry *dentry,
f05d147f
BS		 4470 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
4471{
b72888cb 4472 struct rpc_clnt *client = NFS_CLIENT(dir);
f05d147f 4473 int status;
f05d147f 4474
f7b37b8b 4475 status = nfs4_proc_lookup_common(&client, dir, dentry, fhandle, fattr, NULL);
b72888cb 4476 if (status < 0)
f05d147f 4477 return ERR_PTR(status);
b72888cb 4478 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
f05d147f
BS		 4479}
4480
5b5faaf6
JL		 4481static int _nfs4_proc_lookupp(struct inode *inode,
4482 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
4483 struct nfs4_label *label)
4484{
4485 struct rpc_clnt *clnt = NFS_CLIENT(inode);
4486 struct nfs_server *server = NFS_SERVER(inode);
4487 int status;
4488 struct nfs4_lookupp_arg args = {
4489 .bitmask = server->attr_bitmask,
4490 .fh = NFS_FH(inode),
4491 };
4492 struct nfs4_lookupp_res res = {
4493 .server = server,
4494 .fattr = fattr,
4495 .label = label,
4496 .fh = fhandle,
4497 };
4498 struct rpc_message msg = {
4499 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUPP],
4500 .rpc_argp = &args,
4501 .rpc_resp = &res,
4502 };
76998ebb
TM		 4503 unsigned short task_flags = 0;
4504
4505 if (NFS_SERVER(inode)->flags & NFS_MOUNT_SOFTREVAL)
4506 task_flags |= RPC_TASK_TIMEOUT;
5b5faaf6
JL		 4507
4508 args.bitmask = nfs4_bitmask(server, label);
4509
4510 nfs_fattr_init(fattr);
4511
4512 dprintk("NFS call lookupp ino=0x%lx\n", inode->i_ino);
4513 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
76998ebb 4514 &res.seq_res, task_flags);
5b5faaf6
JL		 4515 dprintk("NFS reply lookupp: %d\n", status);
4516 return status;
4517}
4518
4519static int nfs4_proc_lookupp(struct inode *inode, struct nfs_fh *fhandle,
4520 struct nfs_fattr *fattr, struct nfs4_label *label)
4521{
0688e64b
TM		 4522 struct nfs4_exception exception = {
4523 .interruptible = true,
4524 };
5b5faaf6
JL		 4525 int err;
4526 do {
4527 err = _nfs4_proc_lookupp(inode, fhandle, fattr, label);
4528 trace_nfs4_lookupp(inode, err);
4529 err = nfs4_handle_exception(NFS_SERVER(inode), err,
4530 &exception);
4531 } while (exception.retry);
4532 return err;
4533}
4534
1da177e4
LT		 4535static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
4536{
76b32999 4537 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 4538 struct nfs4_accessargs args = {
4539 .fh = NFS_FH(inode),
1750d929 4540 .access = entry->mask,
76b32999
TM		 4541 };
4542 struct nfs4_accessres res = {
4543 .server = server,
1da177e4 4544 };
1da177e4
LT		 4545 struct rpc_message msg = {
4546 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
4547 .rpc_argp = &args,
4548 .rpc_resp = &res,
4549 .rpc_cred = entry->cred,
4550 };
aa9c2669 4551 int status = 0;
1da177e4 4552
7c672654 4553 if (!nfs4_have_delegation(inode, FMODE_READ)) {
8bcbe7d9
TM		 4554 res.fattr = nfs_alloc_fattr();
4555 if (res.fattr == NULL)
4556 return -ENOMEM;
4557 args.bitmask = server->cache_consistency_bitmask;
4558 }
7c513058 4559 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 4560 if (!status) {
6168f62c 4561 nfs_access_set_mask(entry, res.access);
8bcbe7d9
TM		 4562 if (res.fattr)
4563 nfs_refresh_inode(inode, res.fattr);
1da177e4 4564 }
c407d41a 4565 nfs_free_fattr(res.fattr);
1da177e4
LT		 4566 return status;
4567}
4568
4569static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
4570{
0688e64b
TM		 4571 struct nfs4_exception exception = {
4572 .interruptible = true,
4573 };
1da177e4
LT		 4574 int err;
4575 do {
c1578b76
TM		 4576 err = _nfs4_proc_access(inode, entry);
4577 trace_nfs4_access(inode, err);
4578 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 4579 &exception);
4580 } while (exception.retry);
4581 return err;
4582}
4583
4584/*
4585 * TODO: For the time being, we don't try to get any attributes
4586 * along with any of the zero-copy operations READ, READDIR,
4587 * READLINK, WRITE.
4588 *
4589 * In the case of the first three, we want to put the GETATTR
4590 * after the read-type operation -- this is because it is hard
4591 * to predict the length of a GETATTR response in v4, and thus
4592 * align the READ data correctly. This means that the GETATTR
4593 * may end up partially falling into the page cache, and we should
4594 * shift it into the 'tail' of the xdr_buf before processing.
4595 * To do this efficiently, we need to know the total length
4596 * of data received, which doesn't seem to be available outside
4597 * of the RPC layer.
4598 *
4599 * In the case of WRITE, we also want to put the GETATTR after
4600 * the operation -- in this case because we want to make sure
140150db 4601 * we get the post-operation mtime and size.
1da177e4
LT		 4602 *
4603 * Both of these changes to the XDR layer would in fact be quite
4604 * minor, but I decided to leave them for a subsequent patch.
4605 */
4606static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
4607 unsigned int pgbase, unsigned int pglen)
4608{
4609 struct nfs4_readlink args = {
4610 .fh = NFS_FH(inode),
4611 .pgbase = pgbase,
4612 .pglen = pglen,
4613 .pages = &page,
4614 };
f50c7000 4615 struct nfs4_readlink_res res;
1da177e4
LT		 4616 struct rpc_message msg = {
4617 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
4618 .rpc_argp = &args,
f50c7000 4619 .rpc_resp = &res,
1da177e4
LT		 4620 };
4621
7c513058 4622 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4623}
4624
4625static int nfs4_proc_readlink(struct inode *inode, struct page *page,
4626 unsigned int pgbase, unsigned int pglen)
4627{
0688e64b
TM		 4628 struct nfs4_exception exception = {
4629 .interruptible = true,
4630 };
1da177e4
LT		 4631 int err;
4632 do {
c1578b76
TM		 4633 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
4634 trace_nfs4_readlink(inode, err);
4635 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 4636 &exception);
4637 } while (exception.retry);
4638 return err;
4639}
4640
1da177e4 4641/*
8867fe58 4642 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 4643 */
1da177e4
LT		 4644static int
4645nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 4646 int flags)
1da177e4 4647{
dff25ddb 4648 struct nfs_server *server = NFS_SERVER(dir);
aa9c2669 4649 struct nfs4_label l, *ilabel = NULL;
8867fe58 4650 struct nfs_open_context *ctx;
1da177e4 4651 struct nfs4_state *state;
1da177e4
LT		 4652 int status = 0;
4653
532d4def 4654 ctx = alloc_nfs_open_context(dentry, FMODE_READ, NULL);
8867fe58
MS		 4655 if (IS_ERR(ctx))
4656 return PTR_ERR(ctx);
4657
aa9c2669
DQ		 4658 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
4659
dff25ddb
AG		 4660 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
4661 sattr->ia_mode &= ~current_umask();
c5c3fb5f 4662 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, NULL);
1da177e4
LT		 4663 if (IS_ERR(state)) {
4664 status = PTR_ERR(state);
c0204fd2 4665 goto out;
1da177e4 4666 }
1da177e4 4667out:
aa9c2669 4668 nfs4_label_release_security(ilabel);
8867fe58 4669 put_nfs_open_context(ctx);
1da177e4
LT		 4670 return status;
4671}
4672
3c591175
TM		 4673static int
4674_nfs4_proc_remove(struct inode *dir, const struct qstr *name, u32 ftype)
1da177e4 4675{
16e42959 4676 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 4677 struct nfs_removeargs args = {
1da177e4 4678 .fh = NFS_FH(dir),
26fe5750 4679 .name = *name,
16e42959 4680 };
4fdc17b2 4681 struct nfs_removeres res = {
16e42959 4682 .server = server,
1da177e4 4683 };
1da177e4 4684 struct rpc_message msg = {
4fdc17b2
TM		 4685 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
4686 .rpc_argp = &args,
4687 .rpc_resp = &res,
1da177e4 4688 };
d3129ef6 4689 unsigned long timestamp = jiffies;
778d2817 4690 int status;
1da177e4 4691
7c513058 4692 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
3c591175
TM		 4693 if (status == 0) {
4694 spin_lock(&dir->i_lock);
3c591175
TM		 4695 /* Removing a directory decrements nlink in the parent */
4696 if (ftype == NF4DIR && dir->i_nlink > 2)
4697 nfs4_dec_nlink_locked(dir);
82eae5a4
TM		 4698 nfs4_update_changeattr_locked(dir, &res.cinfo, timestamp,
4699 NFS_INO_INVALID_DATA);
3c591175
TM		 4700 spin_unlock(&dir->i_lock);
4701 }
1da177e4
LT		 4702 return status;
4703}
4704
912678db 4705static int nfs4_proc_remove(struct inode *dir, struct dentry *dentry)
1da177e4 4706{
0688e64b
TM		 4707 struct nfs4_exception exception = {
4708 .interruptible = true,
4709 };
912678db 4710 struct inode *inode = d_inode(dentry);
1da177e4 4711 int err;
912678db 4712
c01d3645
TM		 4713 if (inode) {
4714 if (inode->i_nlink == 1)
4715 nfs4_inode_return_delegation(inode);
4716 else
4717 nfs4_inode_make_writeable(inode);
4718 }
912678db 4719 do {
3c591175 4720 err = _nfs4_proc_remove(dir, &dentry->d_name, NF4REG);
912678db
TM		 4721 trace_nfs4_remove(dir, &dentry->d_name, err);
4722 err = nfs4_handle_exception(NFS_SERVER(dir), err,
4723 &exception);
4724 } while (exception.retry);
4725 return err;
4726}
4727
4728static int nfs4_proc_rmdir(struct inode *dir, const struct qstr *name)
4729{
0688e64b
TM		 4730 struct nfs4_exception exception = {
4731 .interruptible = true,
4732 };
912678db
TM		 4733 int err;
4734
1da177e4 4735 do {
3c591175 4736 err = _nfs4_proc_remove(dir, name, NF4DIR);
078ea3df
TM		 4737 trace_nfs4_remove(dir, name, err);
4738 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4739 &exception);
4740 } while (exception.retry);
4741 return err;
4742}
4743
ed7e9ad0
TM		 4744static void nfs4_proc_unlink_setup(struct rpc_message *msg,
4745 struct dentry *dentry,
4746 struct inode *inode)
1da177e4 4747{
e4eff1a6
TM		 4748 struct nfs_removeargs *args = msg->rpc_argp;
4749 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 4750
977fcc2b 4751 res->server = NFS_SB(dentry->d_sb);
1da177e4 4752 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
fba83f34 4753 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1, 0);
aa9c2669
DQ		 4754
4755 nfs_fattr_init(res->dir_attr);
977fcc2b
TM		 4756
4757 if (inode)
4758 nfs4_inode_return_delegation(inode);
1da177e4
LT		 4759}
4760
34e137cc
BS		 4761static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
4762{
42e1cca7 4763 nfs4_setup_sequence(NFS_SB(data->dentry->d_sb)->nfs_client,
d9afbd1b
TM		 4764 &data->args.seq_args,
4765 &data->res.seq_res,
4766 task);
1da177e4
LT		 4767}
4768
e4eff1a6 4769static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 4770{
078ea3df
TM		 4771 struct nfs_unlinkdata *data = task->tk_calldata;
4772 struct nfs_removeres *res = &data->res;
e4eff1a6 4773
14516c3a
TM		 4774 if (!nfs4_sequence_done(task, &res->seq_res))
4775 return 0;
8478eaa1
N		 4776 if (nfs4_async_handle_error(task, res->server, NULL,
4777 &data->timeout) == -EAGAIN)
e4eff1a6 4778 return 0;
c40d52fe 4779 if (task->tk_status == 0)
1b523ca9
FL		 4780 nfs4_update_changeattr(dir, &res->cinfo,
4781 res->dir_attr->time_start,
4782 NFS_INO_INVALID_DATA);
e4eff1a6 4783 return 1;
1da177e4
LT		 4784}
4785
f2c2c552
TM		 4786static void nfs4_proc_rename_setup(struct rpc_message *msg,
4787 struct dentry *old_dentry,
4788 struct dentry *new_dentry)
d3d4152a 4789{
d3d4152a
JL		 4790 struct nfs_renameargs *arg = msg->rpc_argp;
4791 struct nfs_renameres *res = msg->rpc_resp;
f2c2c552
TM		 4792 struct inode *old_inode = d_inode(old_dentry);
4793 struct inode *new_inode = d_inode(new_dentry);
d3d4152a 4794
f2c2c552 4795 if (old_inode)
c01d3645 4796 nfs4_inode_make_writeable(old_inode);
f2c2c552
TM		 4797 if (new_inode)
4798 nfs4_inode_return_delegation(new_inode);
d3d4152a 4799 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
f2c2c552 4800 res->server = NFS_SB(old_dentry->d_sb);
fba83f34 4801 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1, 0);
d3d4152a
JL		 4802}
4803
c6bfa1a1
BS		 4804static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
4805{
42e1cca7 4806 nfs4_setup_sequence(NFS_SERVER(data->old_dir)->nfs_client,
d9afbd1b
TM		 4807 &data->args.seq_args,
4808 &data->res.seq_res,
4809 task);
d3d4152a
JL		 4810}
4811
4812static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
4813 struct inode *new_dir)
4814{
fbc6f7c2
TM		 4815 struct nfs_renamedata *data = task->tk_calldata;
4816 struct nfs_renameres *res = &data->res;
d3d4152a
JL		 4817
4818 if (!nfs4_sequence_done(task, &res->seq_res))
4819 return 0;
8478eaa1 4820 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
d3d4152a
JL		 4821 return 0;
4822
c733c49c 4823 if (task->tk_status == 0) {
5636ec4e
TM		 4824 if (new_dir != old_dir) {
4825 /* Note: If we moved a directory, nlink will change */
1b523ca9 4826 nfs4_update_changeattr(old_dir, &res->old_cinfo,
5636ec4e 4827 res->old_fattr->time_start,
fabf2b34 4828 NFS_INO_INVALID_NLINK |
1b523ca9
FL		 4829 NFS_INO_INVALID_DATA);
4830 nfs4_update_changeattr(new_dir, &res->new_cinfo,
5636ec4e 4831 res->new_fattr->time_start,
fabf2b34 4832 NFS_INO_INVALID_NLINK |
1b523ca9 4833 NFS_INO_INVALID_DATA);
5636ec4e 4834 } else
1b523ca9 4835 nfs4_update_changeattr(old_dir, &res->old_cinfo,
5636ec4e 4836 res->old_fattr->time_start,
1b523ca9 4837 NFS_INO_INVALID_DATA);
c733c49c 4838 }
d3d4152a
JL		 4839 return 1;
4840}
4841
beffb8fe 4842static int _nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name)
1da177e4 4843{
91ba2eee 4844 struct nfs_server *server = NFS_SERVER(inode);
2f28dc38 4845 __u32 bitmask[NFS4_BITMASK_SZ];
1da177e4
LT		 4846 struct nfs4_link_arg arg = {
4847 .fh = NFS_FH(inode),
4848 .dir_fh = NFS_FH(dir),
4849 .name = name,
2f28dc38 4850 .bitmask = bitmask,
91ba2eee 4851 };
91ba2eee
TM		 4852 struct nfs4_link_res res = {
4853 .server = server,
1775fd3e 4854 .label = NULL,
1da177e4 4855 };
1da177e4
LT		 4856 struct rpc_message msg = {
4857 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
4858 .rpc_argp = &arg,
91ba2eee 4859 .rpc_resp = &res,
1da177e4 4860 };
136f2627
TM		 4861 int status = -ENOMEM;
4862
4863 res.fattr = nfs_alloc_fattr();
778d2817 4864 if (res.fattr == NULL)
136f2627 4865 goto out;
1da177e4 4866
14c43f76
DQ		 4867 res.label = nfs4_label_alloc(server, GFP_KERNEL);
4868 if (IS_ERR(res.label)) {
4869 status = PTR_ERR(res.label);
4870 goto out;
4871 }
4872
c01d3645 4873 nfs4_inode_make_writeable(inode);
a71029b8
TM		 4874 nfs4_bitmap_copy_adjust(bitmask, nfs4_bitmask(server, res.label), inode,
4875 NFS_INO_INVALID_CHANGE);
7c513058 4876 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee 4877 if (!status) {
1b523ca9
FL		 4878 nfs4_update_changeattr(dir, &res.cinfo, res.fattr->time_start,
4879 NFS_INO_INVALID_DATA);
1301e421 4880 nfs4_inc_nlink(inode);
aa9c2669
DQ		 4881 status = nfs_post_op_update_inode(inode, res.fattr);
4882 if (!status)
4883 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 4884 }
14c43f76
DQ		 4885
4886
4887 nfs4_label_free(res.label);
4888
136f2627 4889out:
136f2627 4890 nfs_free_fattr(res.fattr);
1da177e4
LT		 4891 return status;
4892}
4893
beffb8fe 4894static int nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name)
1da177e4 4895{
0688e64b
TM		 4896 struct nfs4_exception exception = {
4897 .interruptible = true,
4898 };
1da177e4
LT		 4899 int err;
4900 do {
4901 err = nfs4_handle_exception(NFS_SERVER(inode),
4902 _nfs4_proc_link(inode, dir, name),
4903 &exception);
4904 } while (exception.retry);
4905 return err;
4906}
4907
57dc9a57
TM		 4908struct nfs4_createdata {
4909 struct rpc_message msg;
4910 struct nfs4_create_arg arg;
4911 struct nfs4_create_res res;
4912 struct nfs_fh fh;
4913 struct nfs_fattr fattr;
1775fd3e 4914 struct nfs4_label *label;
57dc9a57
TM		 4915};
4916
4917static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
beffb8fe 4918 const struct qstr *name, struct iattr *sattr, u32 ftype)
57dc9a57
TM		 4919{
4920 struct nfs4_createdata *data;
4921
4922 data = kzalloc(sizeof(*data), GFP_KERNEL);
4923 if (data != NULL) {
4924 struct nfs_server *server = NFS_SERVER(dir);
4925
14c43f76
DQ		 4926 data->label = nfs4_label_alloc(server, GFP_KERNEL);
4927 if (IS_ERR(data->label))
4928 goto out_free;
4929
57dc9a57
TM		 4930 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
4931 data->msg.rpc_argp = &data->arg;
4932 data->msg.rpc_resp = &data->res;
4933 data->arg.dir_fh = NFS_FH(dir);
4934 data->arg.server = server;
4935 data->arg.name = name;
4936 data->arg.attrs = sattr;
4937 data->arg.ftype = ftype;
aa9c2669 4938 data->arg.bitmask = nfs4_bitmask(server, data->label);
dff25ddb 4939 data->arg.umask = current_umask();
57dc9a57
TM		 4940 data->res.server = server;
4941 data->res.fh = &data->fh;
4942 data->res.fattr = &data->fattr;
1775fd3e 4943 data->res.label = data->label;
57dc9a57 4944 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 4945 }
4946 return data;
14c43f76
DQ		 4947out_free:
4948 kfree(data);
4949 return NULL;
57dc9a57
TM		 4950}
4951
4952static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
4953{
7c513058 4954 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 4955 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57 4956 if (status == 0) {
3c591175 4957 spin_lock(&dir->i_lock);
3c591175
TM		 4958 /* Creating a directory bumps nlink in the parent */
4959 if (data->arg.ftype == NF4DIR)
4960 nfs4_inc_nlink_locked(dir);
82eae5a4
TM		 4961 nfs4_update_changeattr_locked(dir, &data->res.dir_cinfo,
4962 data->res.fattr->time_start,
4963 NFS_INO_INVALID_DATA);
3c591175 4964 spin_unlock(&dir->i_lock);
1775fd3e 4965 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 4966 }
4967 return status;
4968}
4969
4970static void nfs4_free_createdata(struct nfs4_createdata *data)
4971{
14c43f76 4972 nfs4_label_free(data->label);
57dc9a57
TM		 4973 kfree(data);
4974}
4975
4f390c15 4976static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 4977 struct page *page, unsigned int len, struct iattr *sattr,
4978 struct nfs4_label *label)
1da177e4 4979{
57dc9a57
TM		 4980 struct nfs4_createdata *data;
4981 int status = -ENAMETOOLONG;
1da177e4 4982
94a6d753 4983 if (len > NFS4_MAXPATHLEN)
57dc9a57 4984 goto out;
4f390c15 4985
57dc9a57
TM		 4986 status = -ENOMEM;
4987 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
4988 if (data == NULL)
4989 goto out;
4990
4991 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
4992 data->arg.u.symlink.pages = &page;
4993 data->arg.u.symlink.len = len;
1775fd3e 4994 data->arg.label = label;
1da177e4 4995
57dc9a57
TM		 4996 status = nfs4_do_create(dir, dentry, data);
4997
4998 nfs4_free_createdata(data);
4999out:
1da177e4
LT		 5000 return status;
5001}
5002
4f390c15 5003static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 5004 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 5005{
0688e64b
TM		 5006 struct nfs4_exception exception = {
5007 .interruptible = true,
5008 };
aa9c2669 5009 struct nfs4_label l, *label = NULL;
1da177e4 5010 int err;
aa9c2669
DQ		 5011
5012 label = nfs4_label_init_security(dir, dentry, sattr, &l);
5013
1da177e4 5014 do {
078ea3df
TM		 5015 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
5016 trace_nfs4_symlink(dir, &dentry->d_name, err);
5017 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 5018 &exception);
5019 } while (exception.retry);
aa9c2669
DQ		 5020
5021 nfs4_label_release_security(label);
1da177e4
LT		 5022 return err;
5023}
5024
5025static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 5026 struct iattr *sattr, struct nfs4_label *label)
1da177e4 5027{
57dc9a57
TM		 5028 struct nfs4_createdata *data;
5029 int status = -ENOMEM;
1da177e4 5030
57dc9a57
TM		 5031 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
5032 if (data == NULL)
5033 goto out;
5034
1775fd3e 5035 data->arg.label = label;
57dc9a57
TM		 5036 status = nfs4_do_create(dir, dentry, data);
5037
5038 nfs4_free_createdata(data);
5039out:
1da177e4
LT		 5040 return status;
5041}
5042
5043static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
5044 struct iattr *sattr)
5045{
dff25ddb 5046 struct nfs_server *server = NFS_SERVER(dir);
0688e64b
TM		 5047 struct nfs4_exception exception = {
5048 .interruptible = true,
5049 };
aa9c2669 5050 struct nfs4_label l, *label = NULL;
1da177e4 5051 int err;
a8a5da99 5052
aa9c2669
DQ		 5053 label = nfs4_label_init_security(dir, dentry, sattr, &l);
5054
dff25ddb
AG		 5055 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
5056 sattr->ia_mode &= ~current_umask();
1da177e4 5057 do {
078ea3df
TM		 5058 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
5059 trace_nfs4_mkdir(dir, &dentry->d_name, err);
5060 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 5061 &exception);
5062 } while (exception.retry);
aa9c2669
DQ		 5063 nfs4_label_release_security(label);
5064
1da177e4
LT		 5065 return err;
5066}
5067
82e22a5e
TM		 5068static int _nfs4_proc_readdir(struct nfs_readdir_arg *nr_arg,
5069 struct nfs_readdir_res *nr_res)
1da177e4 5070{
82e22a5e 5071 struct inode *dir = d_inode(nr_arg->dentry);
05ad9175 5072 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 5073 struct nfs4_readdir_arg args = {
5074 .fh = NFS_FH(dir),
82e22a5e 5075 .pages = nr_arg->pages,
1da177e4 5076 .pgbase = 0,
82e22a5e
TM		 5077 .count = nr_arg->page_len,
5078 .plus = nr_arg->plus,
1da177e4
LT		 5079 };
5080 struct nfs4_readdir_res res;
5081 struct rpc_message msg = {
5082 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
5083 .rpc_argp = &args,
5084 .rpc_resp = &res,
82e22a5e 5085 .rpc_cred = nr_arg->cred,
1da177e4
LT		 5086 };
5087 int status;
5088
82e22a5e
TM		 5089 dprintk("%s: dentry = %pd2, cookie = %llu\n", __func__,
5090 nr_arg->dentry, (unsigned long long)nr_arg->cookie);
05ad9175
OK		 5091 if (!(server->caps & NFS_CAP_SECURITY_LABEL))
5092 args.bitmask = server->attr_bitmask_nl;
5093 else
5094 args.bitmask = server->attr_bitmask;
5095
82e22a5e 5096 nfs4_setup_readdir(nr_arg->cookie, nr_arg->verf, nr_arg->dentry, &args);
1da177e4 5097 res.pgbase = args.pgbase;
05ad9175
OK		 5098 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
5099 &res.seq_res, 0);
ac396128 5100 if (status >= 0) {
82e22a5e 5101 memcpy(nr_res->verf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 5102 status += args.pgbase;
5103 }
c4812998
TM		 5104
5105 nfs_invalidate_atime(dir);
5106
3110ff80 5107 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 5108 return status;
5109}
5110
82e22a5e
TM		 5111static int nfs4_proc_readdir(struct nfs_readdir_arg *arg,
5112 struct nfs_readdir_res *res)
1da177e4 5113{
0688e64b
TM		 5114 struct nfs4_exception exception = {
5115 .interruptible = true,
5116 };
1da177e4
LT		 5117 int err;
5118 do {
82e22a5e
TM		 5119 err = _nfs4_proc_readdir(arg, res);
5120 trace_nfs4_readdir(d_inode(arg->dentry), err);
5121 err = nfs4_handle_exception(NFS_SERVER(d_inode(arg->dentry)),
5122 err, &exception);
1da177e4
LT		 5123 } while (exception.retry);
5124 return err;
5125}
5126
5127static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 5128 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 5129{
57dc9a57
TM		 5130 struct nfs4_createdata *data;
5131 int mode = sattr->ia_mode;
5132 int status = -ENOMEM;
1da177e4 5133
57dc9a57
TM		 5134 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
5135 if (data == NULL)
5136 goto out;
5137
1da177e4 5138 if (S_ISFIFO(mode))
57dc9a57 5139 data->arg.ftype = NF4FIFO;
1da177e4 5140 else if (S_ISBLK(mode)) {
57dc9a57
TM		 5141 data->arg.ftype = NF4BLK;
5142 data->arg.u.device.specdata1 = MAJOR(rdev);
5143 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 5144 }
5145 else if (S_ISCHR(mode)) {
57dc9a57
TM		 5146 data->arg.ftype = NF4CHR;
5147 data->arg.u.device.specdata1 = MAJOR(rdev);
5148 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 5149 } else if (!S_ISSOCK(mode)) {
5150 status = -EINVAL;
5151 goto out_free;
1da177e4 5152 }
1775fd3e 5153
aa9c2669 5154 data->arg.label = label;
57dc9a57 5155 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 5156out_free:
57dc9a57
TM		 5157 nfs4_free_createdata(data);
5158out:
1da177e4
LT		 5159 return status;
5160}
5161
5162static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
5163 struct iattr *sattr, dev_t rdev)
5164{
dff25ddb 5165 struct nfs_server *server = NFS_SERVER(dir);
0688e64b
TM		 5166 struct nfs4_exception exception = {
5167 .interruptible = true,
5168 };
aa9c2669 5169 struct nfs4_label l, *label = NULL;
1da177e4 5170 int err;
a8a5da99 5171
aa9c2669
DQ		 5172 label = nfs4_label_init_security(dir, dentry, sattr, &l);
5173
dff25ddb
AG		 5174 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
5175 sattr->ia_mode &= ~current_umask();
1da177e4 5176 do {
078ea3df
TM		 5177 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
5178 trace_nfs4_mknod(dir, &dentry->d_name, err);
5179 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 5180 &exception);
5181 } while (exception.retry);
aa9c2669
DQ		 5182
5183 nfs4_label_release_security(label);
5184
1da177e4
LT		 5185 return err;
5186}
5187
5188static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
5189 struct nfs_fsstat *fsstat)
5190{
5191 struct nfs4_statfs_arg args = {
5192 .fh = fhandle,
5193 .bitmask = server->attr_bitmask,
5194 };
24ad148a
BH		 5195 struct nfs4_statfs_res res = {
5196 .fsstat = fsstat,
5197 };
1da177e4
LT		 5198 struct rpc_message msg = {
5199 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
5200 .rpc_argp = &args,
24ad148a 5201 .rpc_resp = &res,
1da177e4
LT		 5202 };
5203
0e574af1 5204 nfs_fattr_init(fsstat->fattr);
7c513058 5205 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 5206}
5207
5208static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
5209{
0688e64b
TM		 5210 struct nfs4_exception exception = {
5211 .interruptible = true,
5212 };
1da177e4
LT		 5213 int err;
5214 do {
5215 err = nfs4_handle_exception(server,
5216 _nfs4_proc_statfs(server, fhandle, fsstat),
5217 &exception);
5218 } while (exception.retry);
5219 return err;
5220}
5221
5222static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
5223 struct nfs_fsinfo *fsinfo)
5224{
5225 struct nfs4_fsinfo_arg args = {
5226 .fh = fhandle,
5227 .bitmask = server->attr_bitmask,
5228 };
3dda5e43
BH		 5229 struct nfs4_fsinfo_res res = {
5230 .fsinfo = fsinfo,
5231 };
1da177e4
LT		 5232 struct rpc_message msg = {
5233 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
5234 .rpc_argp = &args,
3dda5e43 5235 .rpc_resp = &res,
1da177e4
LT		 5236 };
5237
7c513058 5238 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 5239}
5240
5241static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
5242{
0688e64b
TM		 5243 struct nfs4_exception exception = {
5244 .interruptible = true,
5245 };
1da177e4
LT		 5246 int err;
5247
5248 do {
83ca7f5a 5249 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
b5f875a9 5250 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
83ca7f5a 5251 if (err == 0) {
7dc2993a 5252 nfs4_set_lease_period(server->nfs_client, fsinfo->lease_time * HZ);
83ca7f5a
CL		 5253 break;
5254 }
5255 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 5256 } while (exception.retry);
5257 return err;
5258}
5259
5260static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
5261{
e38eb650
BS		 5262 int error;
5263
0e574af1 5264 nfs_fattr_init(fsinfo->fattr);
e38eb650 5265 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 5266 if (error == 0) {
5267 /* block layout checks this! */
5268 server->pnfs_blksize = fsinfo->blksize;
ca440c38 5269 set_pnfs_layoutdriver(server, fhandle, fsinfo);
dc182549 5270 }
e38eb650
BS		 5271
5272 return error;
1da177e4
LT		 5273}
5274
5275static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
5276 struct nfs_pathconf *pathconf)
5277{
5278 struct nfs4_pathconf_arg args = {
5279 .fh = fhandle,
5280 .bitmask = server->attr_bitmask,
5281 };
d45b2989
BH		 5282 struct nfs4_pathconf_res res = {
5283 .pathconf = pathconf,
5284 };
1da177e4
LT		 5285 struct rpc_message msg = {
5286 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
5287 .rpc_argp = &args,
d45b2989 5288 .rpc_resp = &res,
1da177e4
LT		 5289 };
5290
5291 /* None of the pathconf attributes are mandatory to implement */
5292 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
5293 memset(pathconf, 0, sizeof(*pathconf));
5294 return 0;
5295 }
5296
0e574af1 5297 nfs_fattr_init(pathconf->fattr);
7c513058 5298 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 5299}
5300
5301static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
5302 struct nfs_pathconf *pathconf)
5303{
0688e64b
TM		 5304 struct nfs4_exception exception = {
5305 .interruptible = true,
5306 };
1da177e4
LT		 5307 int err;
5308
5309 do {
5310 err = nfs4_handle_exception(server,
5311 _nfs4_proc_pathconf(server, fhandle, pathconf),
5312 &exception);
5313 } while (exception.retry);
5314 return err;
5315}
5316
5521abfd 5317int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 5318 const struct nfs_open_context *ctx,
5319 const struct nfs_lock_context *l_ctx,
5320 fmode_t fmode)
5321{
17393475 5322 return nfs4_select_rw_stateid(ctx->state, fmode, l_ctx, stateid, NULL);
9b206149
TM		 5323}
5324EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
5325
5521abfd
TM		 5326static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
5327 const struct nfs_open_context *ctx,
5328 const struct nfs_lock_context *l_ctx,
5329 fmode_t fmode)
5330{
d49dd117 5331 nfs4_stateid _current_stateid;
5521abfd 5332
e1253be0 5333 /* If the current stateid represents a lost lock, then exit */
d49dd117 5334 if (nfs4_set_rw_stateid(&_current_stateid, ctx, l_ctx, fmode) == -EIO)
e1253be0 5335 return true;
d49dd117 5336 return nfs4_stateid_match(stateid, &_current_stateid);
5521abfd
TM		 5337}
5338
5339static bool nfs4_error_stateid_expired(int err)
5340{
5341 switch (err) {
5342 case -NFS4ERR_DELEG_REVOKED:
5343 case -NFS4ERR_ADMIN_REVOKED:
5344 case -NFS4ERR_BAD_STATEID:
5345 case -NFS4ERR_STALE_STATEID:
5346 case -NFS4ERR_OLD_STATEID:
5347 case -NFS4ERR_OPENMODE:
5348 case -NFS4ERR_EXPIRED:
5349 return true;
5350 }
5351 return false;
5352}
5353
d45f60c6 5354static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
1da177e4 5355{
d45f60c6 5356 struct nfs_server *server = NFS_SERVER(hdr->inode);
1da177e4 5357
d45f60c6 5358 trace_nfs4_read(hdr, task->tk_status);
9c27869d
TM		 5359 if (task->tk_status < 0) {
5360 struct nfs4_exception exception = {
5361 .inode = hdr->inode,
5362 .state = hdr->args.context->state,
5363 .stateid = &hdr->args.stateid,
5364 };
5365 task->tk_status = nfs4_async_handle_exception(task,
5366 server, task->tk_status, &exception);
5367 if (exception.retry) {
5368 rpc_restart_call_prepare(task);
5369 return -EAGAIN;
5370 }
1da177e4 5371 }
8850df99 5372
1da177e4 5373 if (task->tk_status > 0)
d45f60c6 5374 renew_lease(server, hdr->timestamp);
ec06c096 5375 return 0;
1da177e4
LT		 5376}
5377
5521abfd 5378static bool nfs4_read_stateid_changed(struct rpc_task *task,
3c6b899c 5379 struct nfs_pgio_args *args)
5521abfd
TM		 5380{
5381
5382 if (!nfs4_error_stateid_expired(task->tk_status) ||
5383 nfs4_stateid_is_current(&args->stateid,
5384 args->context,
5385 args->lock_context,
5386 FMODE_READ))
5387 return false;
5388 rpc_restart_call_prepare(task);
5389 return true;
5390}
5391
c5675526
AS		 5392static bool nfs4_read_plus_not_supported(struct rpc_task *task,
5393 struct nfs_pgio_header *hdr)
cbdabc7f 5394{
c5675526
AS		 5395 struct nfs_server *server = NFS_SERVER(hdr->inode);
5396 struct rpc_message *msg = &task->tk_msg;
cbdabc7f 5397
c5675526
AS		 5398 if (msg->rpc_proc == &nfs4_procedures[NFSPROC4_CLNT_READ_PLUS] &&
5399 server->caps & NFS_CAP_READ_PLUS && task->tk_status == -ENOTSUPP) {
5400 server->caps &= ~NFS_CAP_READ_PLUS;
5401 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
5402 rpc_restart_call_prepare(task);
5403 return true;
5404 }
5405 return false;
5406}
5407
5408static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
5409{
cbdabc7f
AA		 5410 dprintk("--> %s\n", __func__);
5411
d45f60c6 5412 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
cbdabc7f 5413 return -EAGAIN;
d45f60c6 5414 if (nfs4_read_stateid_changed(task, &hdr->args))
5521abfd 5415 return -EAGAIN;
c5675526
AS		 5416 if (nfs4_read_plus_not_supported(task, hdr))
5417 return -EAGAIN;
bfc505de
TM		 5418 if (task->tk_status > 0)
5419 nfs_invalidate_atime(hdr->inode);
d45f60c6
WAA		 5420 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
5421 nfs4_read_done_cb(task, hdr);
cbdabc7f
AA		 5422}
5423
21e31401 5424#if defined CONFIG_NFS_V4_2 && defined CONFIG_NFS_V4_2_READ_PLUS
5c3485bb
TM		 5425static void nfs42_read_plus_support(struct nfs_pgio_header *hdr,
5426 struct rpc_message *msg)
c5675526 5427{
5c3485bb
TM		 5428 /* Note: We don't use READ_PLUS with pNFS yet */
5429 if (nfs_server_capable(hdr->inode, NFS_CAP_READ_PLUS) && !hdr->ds_clp)
c5675526 5430 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ_PLUS];
c5675526
AS		 5431}
5432#else
5c3485bb
TM		 5433static void nfs42_read_plus_support(struct nfs_pgio_header *hdr,
5434 struct rpc_message *msg)
c5675526 5435{
c5675526
AS		 5436}
5437#endif /* CONFIG_NFS_V4_2 */
5438
d45f60c6
WAA		 5439static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
5440 struct rpc_message *msg)
1da177e4 5441{
d45f60c6 5442 hdr->timestamp = jiffies;
ca857cc1
TM		 5443 if (!hdr->pgio_done_cb)
5444 hdr->pgio_done_cb = nfs4_read_done_cb;
5c3485bb
TM		 5445 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
5446 nfs42_read_plus_support(hdr, msg);
fba83f34 5447 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0, 0);
1da177e4
LT		 5448}
5449
d45f60c6
WAA		 5450static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
5451 struct nfs_pgio_header *hdr)
ea7c3303 5452{
42e1cca7 5453 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode)->nfs_client,
d45f60c6
WAA		 5454 &hdr->args.seq_args,
5455 &hdr->res.seq_res,
9b206149 5456 task))
ef1820f9 5457 return 0;
d45f60c6
WAA		 5458 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
5459 hdr->args.lock_context,
fbe77c30 5460 hdr->rw_mode) == -EIO)
ef1820f9 5461 return -EIO;
d45f60c6 5462 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
ef1820f9
N		 5463 return -EIO;
5464 return 0;
1da177e4
LT		 5465}
5466
d45f60c6
WAA		 5467static int nfs4_write_done_cb(struct rpc_task *task,
5468 struct nfs_pgio_header *hdr)
1da177e4 5469{
d45f60c6 5470 struct inode *inode = hdr->inode;
8478eaa1 5471
d45f60c6 5472 trace_nfs4_write(hdr, task->tk_status);
9c27869d
TM		 5473 if (task->tk_status < 0) {
5474 struct nfs4_exception exception = {
5475 .inode = hdr->inode,
5476 .state = hdr->args.context->state,
5477 .stateid = &hdr->args.stateid,
5478 };
5479 task->tk_status = nfs4_async_handle_exception(task,
5480 NFS_SERVER(inode), task->tk_status,
5481 &exception);
5482 if (exception.retry) {
5483 rpc_restart_call_prepare(task);
5484 return -EAGAIN;
5485 }
1da177e4 5486 }
4f9838c7 5487 if (task->tk_status >= 0) {
d45f60c6 5488 renew_lease(NFS_SERVER(inode), hdr->timestamp);
a08a8cd3 5489 nfs_writeback_update_inode(hdr);
4f9838c7 5490 }
788e7a89 5491 return 0;
1da177e4
LT		 5492}
5493
5521abfd 5494static bool nfs4_write_stateid_changed(struct rpc_task *task,
3c6b899c 5495 struct nfs_pgio_args *args)
5521abfd
TM		 5496{
5497
5498 if (!nfs4_error_stateid_expired(task->tk_status) ||
5499 nfs4_stateid_is_current(&args->stateid,
5500 args->context,
5501 args->lock_context,
5502 FMODE_WRITE))
5503 return false;
5504 rpc_restart_call_prepare(task);
5505 return true;
5506}
5507
d45f60c6 5508static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
b029bc9b 5509{
d45f60c6 5510 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
b029bc9b 5511 return -EAGAIN;
d45f60c6 5512 if (nfs4_write_stateid_changed(task, &hdr->args))
5521abfd 5513 return -EAGAIN;
d45f60c6
WAA		 5514 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
5515 nfs4_write_done_cb(task, hdr);
b029bc9b
FI		 5516}
5517
5a37f851 5518static
d45f60c6 5519bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
a69aef14 5520{
5a37f851 5521 /* Don't request attributes for pNFS or O_DIRECT writes */
d45f60c6 5522 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
5a37f851
TM		 5523 return false;
5524 /* Otherwise, request attributes if and only if we don't hold
5525 * a delegation
5526 */
011e2a7f 5527 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 5528}
a69aef14 5529
332d1a03
TM		 5530static void nfs4_bitmask_set(__u32 bitmask[NFS4_BITMASK_SZ], const __u32 *src,
5531 struct inode *inode, struct nfs_server *server,
5532 struct nfs4_label *label)
76bd5c01 5533{
76bd5c01 5534 unsigned long cache_validity = READ_ONCE(NFS_I(inode)->cache_validity);
332d1a03 5535 unsigned int i;
76bd5c01 5536
332d1a03 5537 memcpy(bitmask, src, sizeof(*bitmask) * NFS4_BITMASK_SZ);
76bd5c01 5538
13c0b082 5539 if (cache_validity & NFS_INO_INVALID_CHANGE)
332d1a03 5540 bitmask[0] |= FATTR4_WORD0_CHANGE;
76bd5c01
OK		 5541 if (cache_validity & NFS_INO_INVALID_ATIME)
5542 bitmask[1] |= FATTR4_WORD1_TIME_ACCESS;
720869eb
TM		 5543 if (cache_validity & NFS_INO_INVALID_MODE)
5544 bitmask[1] |= FATTR4_WORD1_MODE;
45901a23 5545 if (cache_validity & NFS_INO_INVALID_OTHER)
720869eb 5546 bitmask[1] |= FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP;
fabf2b34
TM		 5547 if (cache_validity & NFS_INO_INVALID_NLINK)
5548 bitmask[1] |= FATTR4_WORD1_NUMLINKS;
45901a23 5549 if (label && label->len && cache_validity & NFS_INO_INVALID_LABEL)
76bd5c01 5550 bitmask[2] |= FATTR4_WORD2_SECURITY_LABEL;
45901a23
TM		 5551 if (cache_validity & NFS_INO_INVALID_CTIME)
5552 bitmask[1] |= FATTR4_WORD1_TIME_METADATA;
76bd5c01
OK		 5553 if (cache_validity & NFS_INO_INVALID_MTIME)
5554 bitmask[1] |= FATTR4_WORD1_TIME_MODIFY;
76bd5c01
OK		 5555 if (cache_validity & NFS_INO_INVALID_BLOCKS)
5556 bitmask[1] |= FATTR4_WORD1_SPACE_USED;
332d1a03 5557
cc7f2dae 5558 if (cache_validity & NFS_INO_INVALID_SIZE)
332d1a03
TM		 5559 bitmask[0] |= FATTR4_WORD0_SIZE;
5560
5561 for (i = 0; i < NFS4_BITMASK_SZ; i++)
5562 bitmask[i] &= server->attr_bitmask[i];
76bd5c01
OK		 5563}
5564
d45f60c6 5565static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
fb91fb0e
AS		 5566 struct rpc_message *msg,
5567 struct rpc_clnt **clnt)
1da177e4 5568{
d45f60c6 5569 struct nfs_server *server = NFS_SERVER(hdr->inode);
bdc7f021 5570
d45f60c6
WAA		 5571 if (!nfs4_write_need_cache_consistency_data(hdr)) {
5572 hdr->args.bitmask = NULL;
5573 hdr->res.fattr = NULL;
76bd5c01 5574 } else {
332d1a03
TM		 5575 nfs4_bitmask_set(hdr->args.bitmask_store,
5576 server->cache_consistency_bitmask,
5577 hdr->inode, server, NULL);
5578 hdr->args.bitmask = hdr->args.bitmask_store;
76bd5c01 5579 }
5a37f851 5580
d45f60c6
WAA		 5581 if (!hdr->pgio_done_cb)
5582 hdr->pgio_done_cb = nfs4_write_done_cb;
5583 hdr->res.server = server;
5584 hdr->timestamp = jiffies;
1da177e4 5585
bdc7f021 5586 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
cd1b659d 5587 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0, 0);
fb91fb0e 5588 nfs4_state_protect_write(server->nfs_client, clnt, msg, hdr);
1da177e4
LT		 5589}
5590
0b7c0153 5591static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 5592{
42e1cca7 5593 nfs4_setup_sequence(NFS_SERVER(data->inode)->nfs_client,
d9afbd1b
TM		 5594 &data->args.seq_args,
5595 &data->res.seq_res,
5596 task);
1da177e4
LT		 5597}
5598
0b7c0153 5599static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 5600{
1da177e4 5601 struct inode *inode = data->inode;
14516c3a 5602
cc668ab3 5603 trace_nfs4_commit(data, task->tk_status);
8478eaa1
N		 5604 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
5605 NULL, NULL) == -EAGAIN) {
d00c5d43 5606 rpc_restart_call_prepare(task);
788e7a89 5607 return -EAGAIN;
1da177e4 5608 }
788e7a89 5609 return 0;
1da177e4
LT		 5610}
5611
0b7c0153 5612static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 5613{
5614 if (!nfs4_sequence_done(task, &data->res.seq_res))
5615 return -EAGAIN;
0b7c0153 5616 return data->commit_done_cb(task, data);
5f452431
FI		 5617}
5618
e9ae1ee2
AS		 5619static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg,
5620 struct rpc_clnt **clnt)
1da177e4 5621{
788e7a89 5622 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 5623
0b7c0153
FI		 5624 if (data->commit_done_cb == NULL)
5625 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 5626 data->res.server = server;
bdc7f021 5627 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
fba83f34 5628 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 0);
e9ae1ee2 5629 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_COMMIT, clnt, msg);
1da177e4
LT		 5630}
5631
6b8d84e2
OK		 5632static int _nfs4_proc_commit(struct file *dst, struct nfs_commitargs *args,
5633 struct nfs_commitres *res)
5634{
5635 struct inode *dst_inode = file_inode(dst);
5636 struct nfs_server *server = NFS_SERVER(dst_inode);
5637 struct rpc_message msg = {
5638 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT],
5639 .rpc_argp = args,
5640 .rpc_resp = res,
5641 };
5642
5643 args->fh = NFS_FH(dst_inode);
5644 return nfs4_call_sync(server->client, server, &msg,
5645 &args->seq_args, &res->seq_res, 1);
5646}
5647
5648int nfs4_proc_commit(struct file *dst, __u64 offset, __u32 count, struct nfs_commitres *res)
5649{
5650 struct nfs_commitargs args = {
5651 .offset = offset,
5652 .count = count,
5653 };
5654 struct nfs_server *dst_server = NFS_SERVER(file_inode(dst));
5655 struct nfs4_exception exception = { };
5656 int status;
5657
5658 do {
5659 status = _nfs4_proc_commit(dst, &args, res);
5660 status = nfs4_handle_exception(dst_server, status, &exception);
5661 } while (exception.retry);
5662
5663 return status;
5664}
5665
9bc4e3ca
CL		 5666struct nfs4_renewdata {
5667 struct nfs_client *client;
5668 unsigned long timestamp;
5669};
5670
1da177e4
LT		 5671/*
5672 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
5673 * standalone procedure for queueing an asynchronous RENEW.
5674 */
9bc4e3ca 5675static void nfs4_renew_release(void *calldata)
dc96aef9 5676{
9bc4e3ca
CL		 5677 struct nfs4_renewdata *data = calldata;
5678 struct nfs_client *clp = data->client;
dc96aef9 5679
212bf41d 5680 if (refcount_read(&clp->cl_count) > 1)
0851de06
AB		 5681 nfs4_schedule_state_renewal(clp);
5682 nfs_put_client(clp);
9bc4e3ca 5683 kfree(data);
dc96aef9
AB		 5684}
5685
9bc4e3ca 5686static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 5687{
9bc4e3ca
CL		 5688 struct nfs4_renewdata *data = calldata;
5689 struct nfs_client *clp = data->client;
5690 unsigned long timestamp = data->timestamp;
1da177e4 5691
c6d01c6f 5692 trace_nfs4_renew_async(clp, task->tk_status);
f8aba1e8
CL		 5693 switch (task->tk_status) {
5694 case 0:
5695 break;
5696 case -NFS4ERR_LEASE_MOVED:
5697 nfs4_schedule_lease_moved_recovery(clp);
5698 break;
5699 default:
95baa25c 5700 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 5701 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
5702 return;
5703 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 5704 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 5705 return;
5706 }
5707 nfs4_schedule_path_down_recovery(clp);
1da177e4 5708 }
452e9352 5709 do_renew_lease(clp, timestamp);
1da177e4
LT		 5710}
5711
963d8fe5
TM		 5712static const struct rpc_call_ops nfs4_renew_ops = {
5713 .rpc_call_done = nfs4_renew_done,
dc96aef9 5714 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 5715};
5716
a52458b4 5717static int nfs4_proc_async_renew(struct nfs_client *clp, const struct cred *cred, unsigned renew_flags)
1da177e4
LT		 5718{
5719 struct rpc_message msg = {
5720 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
5721 .rpc_argp = clp,
b4454fe1 5722 .rpc_cred = cred,
1da177e4 5723 };
9bc4e3ca 5724 struct nfs4_renewdata *data;
1da177e4 5725
2f60ea6b
TM		 5726 if (renew_flags == 0)
5727 return 0;
212bf41d 5728 if (!refcount_inc_not_zero(&clp->cl_count))
0851de06 5729 return -EIO;
b569ad34 5730 data = kmalloc(sizeof(*data), GFP_NOFS);
5c737cb2
DW		 5731 if (data == NULL) {
5732 nfs_put_client(clp);
9bc4e3ca 5733 return -ENOMEM;
5c737cb2 5734 }
9bc4e3ca
CL		 5735 data->client = clp;
5736 data->timestamp = jiffies;
bc7a05ca 5737 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 5738 &nfs4_renew_ops, data);
1da177e4
LT		 5739}
5740
a52458b4 5741static int nfs4_proc_renew(struct nfs_client *clp, const struct cred *cred)
1da177e4
LT		 5742{
5743 struct rpc_message msg = {
5744 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
5745 .rpc_argp = clp,
b4454fe1 5746 .rpc_cred = cred,
1da177e4
LT		 5747 };
5748 unsigned long now = jiffies;
5749 int status;
5750
bc7a05ca 5751 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 5752 if (status < 0)
5753 return status;
452e9352 5754 do_renew_lease(clp, now);
1da177e4
LT		 5755 return 0;
5756}
5757
aa1870af
BF		 5758static inline int nfs4_server_supports_acls(struct nfs_server *server)
5759{
7dd7d959 5760 return server->caps & NFS_CAP_ACLS;
aa1870af
BF		 5761}
5762
21f498c2
TM		 5763/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
5764 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 5765 * the stack.
5766 */
21f498c2 5767#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 5768
ccde1e9c 5769int nfs4_buf_to_pages_noslab(const void *buf, size_t buflen,
8fbcf237 5770 struct page **pages)
e9e3d724
NH		 5771{
5772 struct page *newpage, **spages;
5773 int rc = 0;
5774 size_t len;
5775 spages = pages;
5776
5777 do {
21f498c2 5778 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 5779 newpage = alloc_page(GFP_KERNEL);
5780
5781 if (newpage == NULL)
5782 goto unwind;
5783 memcpy(page_address(newpage), buf, len);
d9b67e1e
AS		 5784 buf += len;
5785 buflen -= len;
e9e3d724
NH		 5786 *pages++ = newpage;
5787 rc++;
5788 } while (buflen != 0);
5789
5790 return rc;
5791
5792unwind:
5793 for(; rc > 0; rc--)
5794 __free_page(spages[rc-1]);
5795 return -ENOMEM;
5796}
5797
e50a1c2e
BF		 5798struct nfs4_cached_acl {
5799 int cached;
5800 size_t len;
5601cda8 5801 char data[];
e50a1c2e
BF		 5802};
5803
5804static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
5805{
5806 struct nfs_inode *nfsi = NFS_I(inode);
5807
5808 spin_lock(&inode->i_lock);
5809 kfree(nfsi->nfs4_acl);
5810 nfsi->nfs4_acl = acl;
5811 spin_unlock(&inode->i_lock);
5812}
5813
5814static void nfs4_zap_acl_attr(struct inode *inode)
5815{
5816 nfs4_set_cached_acl(inode, NULL);
5817}
5818
5819static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
5820{
5821 struct nfs_inode *nfsi = NFS_I(inode);
5822 struct nfs4_cached_acl *acl;
5823 int ret = -ENOENT;
5824
5825 spin_lock(&inode->i_lock);
5826 acl = nfsi->nfs4_acl;
5827 if (acl == NULL)
5828 goto out;
5829 if (buf == NULL) /* user is just asking for length */
5830 goto out_len;
5831 if (acl->cached == 0)
5832 goto out;
5833 ret = -ERANGE; /* see getxattr(2) man page */
5834 if (acl->len > buflen)
5835 goto out;
5836 memcpy(buf, acl->data, acl->len);
5837out_len:
5838 ret = acl->len;
5839out:
5840 spin_unlock(&inode->i_lock);
5841 return ret;
5842}
5843
5794d21e 5844static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 5845{
5846 struct nfs4_cached_acl *acl;
b291f1b1 5847 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 5848
1f1ea6c2 5849 if (buflen <= PAGE_SIZE) {
b291f1b1 5850 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 5851 if (acl == NULL)
5852 goto out;
5853 acl->cached = 1;
5794d21e 5854 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 5855 } else {
5856 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
5857 if (acl == NULL)
5858 goto out;
5859 acl->cached = 0;
5860 }
5861 acl->len = acl_len;
5862out:
5863 nfs4_set_cached_acl(inode, acl);
5864}
5865
bf118a34
AA		 5866/*
5867 * The getxattr API returns the required buffer length when called with a
5868 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
5869 * the required buf. On a NULL buf, we send a page of data to the server
5870 * guessing that the ACL request can be serviced by a page. If so, we cache
5871 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
5872 * the cache. If not so, we throw away the page, and cache the required
5873 * length. The next getxattr call will then produce another round trip to
5874 * the server, this time with the input buf of the required size.
5875 */
16b4289c 5876static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 5877{
62a1573f 5878 struct page **pages;
aa1870af
BF		 5879 struct nfs_getaclargs args = {
5880 .fh = NFS_FH(inode),
aa1870af
BF		 5881 .acl_len = buflen,
5882 };
663c79b3
BH		 5883 struct nfs_getaclres res = {
5884 .acl_len = buflen,
5885 };
aa1870af
BF		 5886 struct rpc_message msg = {
5887 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
5888 .rpc_argp = &args,
663c79b3 5889 .rpc_resp = &res,
aa1870af 5890 };
62a1573f 5891 unsigned int npages;
21f498c2 5892 int ret = -ENOMEM, i;
62a1573f
OK		 5893 struct nfs_server *server = NFS_SERVER(inode);
5894
5895 if (buflen == 0)
5896 buflen = server->rsize;
5897
5898 npages = DIV_ROUND_UP(buflen, PAGE_SIZE) + 1;
5899 pages = kmalloc_array(npages, sizeof(struct page *), GFP_NOFS);
5900 if (!pages)
5901 return -ENOMEM;
aa1870af 5902
62a1573f 5903 args.acl_pages = pages;
5a006899 5904
bf118a34
AA		 5905 for (i = 0; i < npages; i++) {
5906 pages[i] = alloc_page(GFP_KERNEL);
5907 if (!pages[i])
5908 goto out_free;
e50a1c2e 5909 }
5a006899
SP		 5910
5911 /* for decoding across pages */
5912 res.acl_scratch = alloc_page(GFP_KERNEL);
5913 if (!res.acl_scratch)
5914 goto out_free;
5915
bf118a34 5916 args.acl_len = npages * PAGE_SIZE;
5a006899 5917
de040bec 5918 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 5919 __func__, buf, buflen, npages, args.acl_len);
5920 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
5921 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 5922 if (ret)
5923 goto out_free;
bf118a34 5924
1f1ea6c2
TM		 5925 /* Handle the case where the passed-in buffer is too short */
5926 if (res.acl_flags & NFS4_ACL_TRUNC) {
5927 /* Did the user only issue a request for the acl length? */
5928 if (buf == NULL)
5929 goto out_ok;
e50a1c2e 5930 ret = -ERANGE;
1f1ea6c2 5931 goto out_free;
e50a1c2e 5932 }
1f1ea6c2 5933 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 5934 if (buf) {
5935 if (res.acl_len > buflen) {
5936 ret = -ERANGE;
5937 goto out_free;
5938 }
1f1ea6c2 5939 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 5940 }
1f1ea6c2
TM		 5941out_ok:
5942 ret = res.acl_len;
e50a1c2e 5943out_free:
bf118a34
AA		 5944 for (i = 0; i < npages; i++)
5945 if (pages[i])
5946 __free_page(pages[i]);
331818f1
TM		 5947 if (res.acl_scratch)
5948 __free_page(res.acl_scratch);
62a1573f 5949 kfree(pages);
aa1870af
BF		 5950 return ret;
5951}
5952
16b4289c
TM		 5953static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
5954{
0688e64b
TM		 5955 struct nfs4_exception exception = {
5956 .interruptible = true,
5957 };
16b4289c
TM		 5958 ssize_t ret;
5959 do {
5960 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
c1578b76 5961 trace_nfs4_get_acl(inode, ret);
16b4289c
TM		 5962 if (ret >= 0)
5963 break;
5964 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
5965 } while (exception.retry);
5966 return ret;
5967}
5968
e50a1c2e
BF		 5969static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
5970{
5971 struct nfs_server *server = NFS_SERVER(inode);
5972 int ret;
5973
5974 if (!nfs4_server_supports_acls(server))
5975 return -EOPNOTSUPP;
1f3208b2 5976 ret = nfs_revalidate_inode(inode, NFS_INO_INVALID_CHANGE);
e50a1c2e
BF		 5977 if (ret < 0)
5978 return ret;
08a22b39
AK		 5979 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
5980 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 5981 ret = nfs4_read_cached_acl(inode, buf, buflen);
5982 if (ret != -ENOENT)
bf118a34
AA		 5983 /* -ENOENT is returned if there is no ACL or if there is an ACL
5984 * but no cached acl data, just the acl length */
e50a1c2e
BF		 5985 return ret;
5986 return nfs4_get_acl_uncached(inode, buf, buflen);
5987}
5988
16b4289c 5989static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 5990{
5991 struct nfs_server *server = NFS_SERVER(inode);
5992 struct page *pages[NFS4ACL_MAXPAGES];
5993 struct nfs_setaclargs arg = {
5994 .fh = NFS_FH(inode),
5995 .acl_pages = pages,
5996 .acl_len = buflen,
5997 };
73c403a9 5998 struct nfs_setaclres res;
4b580ee3
BF		 5999 struct rpc_message msg = {
6000 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
6001 .rpc_argp = &arg,
73c403a9 6002 .rpc_resp = &res,
4b580ee3 6003 };
21f498c2 6004 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 6005 int ret, i;
4b580ee3 6006
4f8be1f5
BF		 6007 /* You can't remove system.nfs4_acl: */
6008 if (buflen == 0)
6009 return -EINVAL;
4b580ee3
BF		 6010 if (!nfs4_server_supports_acls(server))
6011 return -EOPNOTSUPP;
21f498c2
TM		 6012 if (npages > ARRAY_SIZE(pages))
6013 return -ERANGE;
ccde1e9c 6014 i = nfs4_buf_to_pages_noslab(buf, buflen, arg.acl_pages);
e9e3d724
NH		 6015 if (i < 0)
6016 return i;
c01d3645 6017 nfs4_inode_make_writeable(inode);
7c513058 6018 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 6019
6020 /*
6021 * Free each page after tx, so the only ref left is
6022 * held by the network stack
6023 */
6024 for (; i > 0; i--)
6025 put_page(pages[i-1]);
6026
08a22b39
AK		 6027 /*
6028 * Acl update can result in inode attribute update.
6029 * so mark the attribute cache invalid.
6030 */
6031 spin_lock(&inode->i_lock);
b6f80a2e
TM		 6032 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE |
6033 NFS_INO_INVALID_CTIME |
6034 NFS_INO_REVAL_FORCED);
08a22b39 6035 spin_unlock(&inode->i_lock);
f41f7418
TM		 6036 nfs_access_zap_cache(inode);
6037 nfs_zap_acl_cache(inode);
4b580ee3
BF		 6038 return ret;
6039}
6040
16b4289c
TM		 6041static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
6042{
6043 struct nfs4_exception exception = { };
6044 int err;
6045 do {
c1578b76
TM		 6046 err = __nfs4_proc_set_acl(inode, buf, buflen);
6047 trace_nfs4_set_acl(inode, err);
f8849e20
DN		 6048 if (err == -NFS4ERR_BADOWNER || err == -NFS4ERR_BADNAME) {
6049 /*
6050 * no need to retry since the kernel
6051 * isn't involved in encoding the ACEs.
6052 */
6053 err = -EINVAL;
6054 break;
6055 }
c1578b76 6056 err = nfs4_handle_exception(NFS_SERVER(inode), err,
16b4289c
TM		 6057 &exception);
6058 } while (exception.retry);
6059 return err;
6060}
6061
aa9c2669
DQ		 6062#ifdef CONFIG_NFS_V4_SECURITY_LABEL
6063static int _nfs4_get_security_label(struct inode *inode, void *buf,
6064 size_t buflen)
6065{
6066 struct nfs_server *server = NFS_SERVER(inode);
6067 struct nfs_fattr fattr;
6068 struct nfs4_label label = {0, 0, buflen, buf};
6069
6070 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
fcb63a9b 6071 struct nfs4_getattr_arg arg = {
aa9c2669
DQ		 6072 .fh = NFS_FH(inode),
6073 .bitmask = bitmask,
6074 };
6075 struct nfs4_getattr_res res = {
6076 .fattr = &fattr,
6077 .label = &label,
6078 .server = server,
6079 };
6080 struct rpc_message msg = {
6081 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
fcb63a9b 6082 .rpc_argp = &arg,
aa9c2669
DQ		 6083 .rpc_resp = &res,
6084 };
6085 int ret;
6086
6087 nfs_fattr_init(&fattr);
6088
fcb63a9b 6089 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
aa9c2669
DQ		 6090 if (ret)
6091 return ret;
6092 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
6093 return -ENOENT;
53cb2454 6094 return label.len;
aa9c2669
DQ		 6095}
6096
6097static int nfs4_get_security_label(struct inode *inode, void *buf,
6098 size_t buflen)
6099{
0688e64b
TM		 6100 struct nfs4_exception exception = {
6101 .interruptible = true,
6102 };
aa9c2669
DQ		 6103 int err;
6104
6105 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
6106 return -EOPNOTSUPP;
6107
6108 do {
c1578b76
TM		 6109 err = _nfs4_get_security_label(inode, buf, buflen);
6110 trace_nfs4_get_security_label(inode, err);
6111 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 6112 &exception);
6113 } while (exception.retry);
6114 return err;
6115}
6116
6117static int _nfs4_do_set_security_label(struct inode *inode,
6118 struct nfs4_label *ilabel,
6119 struct nfs_fattr *fattr,
6120 struct nfs4_label *olabel)
6121{
6122
6123 struct iattr sattr = {0};
6124 struct nfs_server *server = NFS_SERVER(inode);
6125 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
12207f69 6126 struct nfs_setattrargs arg = {
d9b67e1e
AS		 6127 .fh = NFS_FH(inode),
6128 .iap = &sattr,
aa9c2669
DQ		 6129 .server = server,
6130 .bitmask = bitmask,
6131 .label = ilabel,
6132 };
6133 struct nfs_setattrres res = {
6134 .fattr = fattr,
6135 .label = olabel,
6136 .server = server,
6137 };
6138 struct rpc_message msg = {
d9b67e1e
AS		 6139 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
6140 .rpc_argp = &arg,
6141 .rpc_resp = &res,
aa9c2669
DQ		 6142 };
6143 int status;
6144
12207f69 6145 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
aa9c2669 6146
12207f69 6147 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
aa9c2669
DQ		 6148 if (status)
6149 dprintk("%s failed: %d\n", __func__, status);
6150
6151 return status;
6152}
6153
6154static int nfs4_do_set_security_label(struct inode *inode,
6155 struct nfs4_label *ilabel,
6156 struct nfs_fattr *fattr,
6157 struct nfs4_label *olabel)
6158{
6159 struct nfs4_exception exception = { };
6160 int err;
6161
6162 do {
c1578b76
TM		 6163 err = _nfs4_do_set_security_label(inode, ilabel,
6164 fattr, olabel);
6165 trace_nfs4_set_security_label(inode, err);
6166 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 6167 &exception);
6168 } while (exception.retry);
6169 return err;
6170}
6171
6172static int
59301226 6173nfs4_set_security_label(struct inode *inode, const void *buf, size_t buflen)
aa9c2669
DQ		 6174{
6175 struct nfs4_label ilabel, *olabel = NULL;
6176 struct nfs_fattr fattr;
aa9c2669
DQ		 6177 int status;
6178
6179 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
6180 return -EOPNOTSUPP;
6181
6182 nfs_fattr_init(&fattr);
6183
6184 ilabel.pi = 0;
6185 ilabel.lfs = 0;
6186 ilabel.label = (char *)buf;
6187 ilabel.len = buflen;
6188
aa9c2669
DQ		 6189 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
6190 if (IS_ERR(olabel)) {
6191 status = -PTR_ERR(olabel);
6192 goto out;
6193 }
6194
6195 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
6196 if (status == 0)
6197 nfs_setsecurity(inode, &fattr, olabel);
6198
6199 nfs4_label_free(olabel);
6200out:
aa9c2669
DQ		 6201 return status;
6202}
6203#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
6204
6205
f092075d
CL		 6206static void nfs4_init_boot_verifier(const struct nfs_client *clp,
6207 nfs4_verifier *bootverf)
cd93710e
CL		 6208{
6209 __be32 verf[2];
6210
2c820d9a
CL		 6211 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
6212 /* An impossible timestamp guarantees this value
6213 * will never match a generated boot time. */
2f86e091
DD		 6214 verf[0] = cpu_to_be32(U32_MAX);
6215 verf[1] = cpu_to_be32(U32_MAX);
2c820d9a 6216 } else {
f092075d 6217 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
2f86e091
DD		 6218 u64 ns = ktime_to_ns(nn->boot_time);
6219
6220 verf[0] = cpu_to_be32(ns >> 32);
6221 verf[1] = cpu_to_be32(ns);
2c820d9a 6222 }
cd93710e
CL		 6223 memcpy(bootverf->data, verf, sizeof(bootverf->data));
6224}
6225
1aee5513 6226static size_t
39d43d16 6227nfs4_get_uniquifier(struct nfs_client *clp, char *buf, size_t buflen)
1aee5513 6228{
39d43d16
TM		 6229 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
6230 struct nfs_netns_client *nn_clp = nn->nfs_client;
6231 const char *id;
6232
1aee5513
TM		 6233 buf[0] = '\0';
6234
39d43d16
TM		 6235 if (nn_clp) {
6236 rcu_read_lock();
6237 id = rcu_dereference(nn_clp->identifier);
6238 if (id)
6239 strscpy(buf, id, buflen);
6240 rcu_read_unlock();
6241 }
6242
6243 if (nfs4_client_id_uniquifier[0] != '\0' && buf[0] == '\0')
1aee5513
TM		 6244 strscpy(buf, nfs4_client_id_uniquifier, buflen);
6245
6246 return strlen(buf);
6247}
6248
a3192688
JL		 6249static int
6250nfs4_init_nonuniform_client_string(struct nfs_client *clp)
e984a55a 6251{
1aee5513
TM		 6252 char buf[NFS4_CLIENT_ID_UNIQ_LEN];
6253 size_t buflen;
a3192688
JL		 6254 size_t len;
6255 char *str;
e984a55a 6256
ceb3a16c 6257 if (clp->cl_owner_id != NULL)
a3192688 6258 return 0;
4a3e5779 6259
a3192688 6260 rcu_read_lock();
848a4eb2
CL		 6261 len = 14 +
6262 strlen(clp->cl_rpcclient->cl_nodename) +
6263 1 +
a3192688 6264 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) +
a3192688
JL		 6265 1;
6266 rcu_read_unlock();
1aee5513 6267
39d43d16 6268 buflen = nfs4_get_uniquifier(clp, buf, sizeof(buf));
1aee5513
TM		 6269 if (buflen)
6270 len += buflen + 1;
6271
a3192688
JL		 6272 if (len > NFS4_OPAQUE_LIMIT + 1)
6273 return -EINVAL;
6274
6275 /*
6276 * Since this string is allocated at mount time, and held until the
6277 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
6278 * about a memory-reclaim deadlock.
6279 */
6280 str = kmalloc(len, GFP_KERNEL);
6281 if (!str)
6282 return -ENOMEM;
ceb3a16c 6283
e984a55a 6284 rcu_read_lock();
1aee5513 6285 if (buflen)
025bb9f8 6286 scnprintf(str, len, "Linux NFSv4.0 %s/%s/%s",
1aee5513 6287 clp->cl_rpcclient->cl_nodename, buf,
848a4eb2 6288 rpc_peeraddr2str(clp->cl_rpcclient,
025bb9f8 6289 RPC_DISPLAY_ADDR));
848a4eb2 6290 else
025bb9f8 6291 scnprintf(str, len, "Linux NFSv4.0 %s/%s",
848a4eb2
CL		 6292 clp->cl_rpcclient->cl_nodename,
6293 rpc_peeraddr2str(clp->cl_rpcclient,
025bb9f8 6294 RPC_DISPLAY_ADDR));
e984a55a 6295 rcu_read_unlock();
a3192688 6296
a3192688
JL		 6297 clp->cl_owner_id = str;
6298 return 0;
e984a55a
CL		 6299}
6300
873e3851
JL		 6301static int
6302nfs4_init_uniform_client_string(struct nfs_client *clp)
e984a55a 6303{
1aee5513
TM		 6304 char buf[NFS4_CLIENT_ID_UNIQ_LEN];
6305 size_t buflen;
873e3851
JL		 6306 size_t len;
6307 char *str;
ceb3a16c
TM		 6308
6309 if (clp->cl_owner_id != NULL)
873e3851 6310 return 0;
6f2ea7f2 6311
873e3851
JL		 6312 len = 10 + 10 + 1 + 10 + 1 +
6313 strlen(clp->cl_rpcclient->cl_nodename) + 1;
6314
39d43d16 6315 buflen = nfs4_get_uniquifier(clp, buf, sizeof(buf));
1aee5513
TM		 6316 if (buflen)
6317 len += buflen + 1;
6318
873e3851
JL		 6319 if (len > NFS4_OPAQUE_LIMIT + 1)
6320 return -EINVAL;
6321
6322 /*
6323 * Since this string is allocated at mount time, and held until the
6324 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
6325 * about a memory-reclaim deadlock.
6326 */
6327 str = kmalloc(len, GFP_KERNEL);
6328 if (!str)
6329 return -ENOMEM;
6330
1aee5513
TM		 6331 if (buflen)
6332 scnprintf(str, len, "Linux NFSv%u.%u %s/%s",
6333 clp->rpc_ops->version, clp->cl_minorversion,
6334 buf, clp->cl_rpcclient->cl_nodename);
6335 else
6336 scnprintf(str, len, "Linux NFSv%u.%u %s",
6337 clp->rpc_ops->version, clp->cl_minorversion,
6338 clp->cl_rpcclient->cl_nodename);
873e3851
JL		 6339 clp->cl_owner_id = str;
6340 return 0;
e984a55a
CL		 6341}
6342
706cb8db
CL		 6343/*
6344 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
6345 * services. Advertise one based on the address family of the
6346 * clientaddr.
6347 */
6348static unsigned int
6349nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
6350{
6351 if (strchr(clp->cl_ipaddr, ':') != NULL)
6352 return scnprintf(buf, len, "tcp6");
6353 else
6354 return scnprintf(buf, len, "tcp");
6355}
6356
f11b2a1c
JL		 6357static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
6358{
6359 struct nfs4_setclientid *sc = calldata;
6360
6361 if (task->tk_status == 0)
6362 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
6363}
6364
6365static const struct rpc_call_ops nfs4_setclientid_ops = {
6366 .rpc_call_done = nfs4_setclientid_done,
6367};
6368
6bbb4ae8
CL		 6369/**
6370 * nfs4_proc_setclientid - Negotiate client ID
6371 * @clp: state data structure
6372 * @program: RPC program for NFSv4 callback service
6373 * @port: IP port number for NFS4 callback service
a52458b4 6374 * @cred: credential to use for this call
6bbb4ae8
CL		 6375 * @res: where to place the result
6376 *
6377 * Returns zero, a negative errno, or a negative NFS4ERR status code.
6378 */
bb8b27e5 6379int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
a52458b4 6380 unsigned short port, const struct cred *cred,
bb8b27e5 6381 struct nfs4_setclientid_res *res)
1da177e4
LT		 6382{
6383 nfs4_verifier sc_verifier;
6384 struct nfs4_setclientid setclientid = {
6385 .sc_verifier = &sc_verifier,
6386 .sc_prog = program,
3a6bb738 6387 .sc_clnt = clp,
1da177e4
LT		 6388 };
6389 struct rpc_message msg = {
6390 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
6391 .rpc_argp = &setclientid,
bb8b27e5 6392 .rpc_resp = res,
286d7d6a 6393 .rpc_cred = cred,
1da177e4 6394 };
f11b2a1c
JL		 6395 struct rpc_task_setup task_setup_data = {
6396 .rpc_client = clp->cl_rpcclient,
6397 .rpc_message = &msg,
6398 .callback_ops = &nfs4_setclientid_ops,
6399 .callback_data = &setclientid,
5a0c257f 6400 .flags = RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN,
f11b2a1c 6401 };
7dc2993a 6402 unsigned long now = jiffies;
6bbb4ae8 6403 int status;
1da177e4 6404
de734831 6405 /* nfs_client_id4 */
f092075d 6406 nfs4_init_boot_verifier(clp, &sc_verifier);
873e3851
JL		 6407
6408 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
6409 status = nfs4_init_uniform_client_string(clp);
6410 else
a3192688 6411 status = nfs4_init_nonuniform_client_string(clp);
873e3851
JL		 6412
6413 if (status)
6414 goto out;
3a6bb738 6415
de734831 6416 /* cb_client4 */
706cb8db
CL		 6417 setclientid.sc_netid_len =
6418 nfs4_init_callback_netid(clp,
6419 setclientid.sc_netid,
6420 sizeof(setclientid.sc_netid));
de734831 6421 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 6422 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 6423 clp->cl_ipaddr, port >> 8, port & 255);
6424
3a6bb738 6425 dprintk("NFS call setclientid auth=%s, '%s'\n",
6bbb4ae8 6426 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3a6bb738 6427 clp->cl_owner_id);
dae40965
AS		 6428
6429 status = nfs4_call_sync_custom(&task_setup_data);
f11b2a1c 6430 if (setclientid.sc_cred) {
1047ec86 6431 kfree(clp->cl_acceptor);
f11b2a1c
JL		 6432 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
6433 put_rpccred(setclientid.sc_cred);
6434 }
7dc2993a
RM		 6435
6436 if (status == 0)
6437 do_renew_lease(clp, now);
f11b2a1c 6438out:
c6d01c6f 6439 trace_nfs4_setclientid(clp, status);
6bbb4ae8
CL		 6440 dprintk("NFS reply setclientid: %d\n", status);
6441 return status;
1da177e4
LT		 6442}
6443
6bbb4ae8
CL		 6444/**
6445 * nfs4_proc_setclientid_confirm - Confirm client ID
6446 * @clp: state data structure
302fad7b 6447 * @arg: result of a previous SETCLIENTID
a52458b4 6448 * @cred: credential to use for this call
6bbb4ae8
CL		 6449 *
6450 * Returns zero, a negative errno, or a negative NFS4ERR status code.
6451 */
fd954ae1 6452int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5 6453 struct nfs4_setclientid_res *arg,
a52458b4 6454 const struct cred *cred)
1da177e4 6455{
1da177e4
LT		 6456 struct rpc_message msg = {
6457 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 6458 .rpc_argp = arg,
286d7d6a 6459 .rpc_cred = cred,
1da177e4 6460 };
1da177e4
LT		 6461 int status;
6462
6bbb4ae8
CL		 6463 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
6464 clp->cl_rpcclient->cl_auth->au_ops->au_name,
6465 clp->cl_clientid);
5a0c257f
N		 6466 status = rpc_call_sync(clp->cl_rpcclient, &msg,
6467 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN);
c6d01c6f 6468 trace_nfs4_setclientid_confirm(clp, status);
6bbb4ae8 6469 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 6470 return status;
6471}
6472
fe650407
TM		 6473struct nfs4_delegreturndata {
6474 struct nfs4_delegreturnargs args;
fa178f29 6475 struct nfs4_delegreturnres res;
fe650407
TM		 6476 struct nfs_fh fh;
6477 nfs4_stateid stateid;
26e976a8 6478 unsigned long timestamp;
586f1c39
TM		 6479 struct {
6480 struct nfs4_layoutreturn_args arg;
6481 struct nfs4_layoutreturn_res res;
4d796d75 6482 struct nfs4_xdr_opaque_data ld_private;
586f1c39
TM		 6483 u32 roc_barrier;
6484 bool roc;
6485 } lr;
fa178f29 6486 struct nfs_fattr fattr;
fe650407 6487 int rpc_status;
039b756a 6488 struct inode *inode;
fe650407
TM		 6489};
6490
fe650407
TM		 6491static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
6492{
6493 struct nfs4_delegreturndata *data = calldata;
e0dba012
TM		 6494 struct nfs4_exception exception = {
6495 .inode = data->inode,
6496 .stateid = &data->stateid,
dfe1fe75 6497 .task_is_privileged = data->args.seq_args.sa_privileged,
e0dba012 6498 };
938e1010 6499
14516c3a
TM		 6500 if (!nfs4_sequence_done(task, &data->res.seq_res))
6501 return;
938e1010 6502
ca8acf8d 6503 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
586f1c39
TM		 6504
6505 /* Handle Layoutreturn errors */
078000d0
TM		 6506 if (pnfs_roc_done(task, &data->args.lr_args, &data->res.lr_res,
6507 &data->res.lr_ret) == -EAGAIN)
287a9c55 6508 goto out_restart;
586f1c39 6509
79708861 6510 switch (task->tk_status) {
79708861 6511 case 0:
fa178f29 6512 renew_lease(data->res.server, data->timestamp);
23ea44c2 6513 break;
c97cf606
TM		 6514 case -NFS4ERR_ADMIN_REVOKED:
6515 case -NFS4ERR_DELEG_REVOKED:
26d36301
TM		 6516 case -NFS4ERR_EXPIRED:
6517 nfs4_free_revoked_stateid(data->res.server,
6518 data->args.stateid,
6519 task->tk_msg.rpc_cred);
df561f66 6520 fallthrough;
c97cf606 6521 case -NFS4ERR_BAD_STATEID:
c97cf606 6522 case -NFS4ERR_STALE_STATEID:
244fcd2f 6523 case -ETIMEDOUT:
c97cf606
TM		 6524 task->tk_status = 0;
6525 break;
12f275cd 6526 case -NFS4ERR_OLD_STATEID:
246afc0a
TM		 6527 if (!nfs4_refresh_delegation_stateid(&data->stateid, data->inode))
6528 nfs4_stateid_seqid_inc(&data->stateid);
70d136b2
TM		 6529 if (data->args.bitmask) {
6530 data->args.bitmask = NULL;
6531 data->res.fattr = NULL;
6532 }
246afc0a 6533 goto out_restart;
8ac2b422
TM		 6534 case -NFS4ERR_ACCESS:
6535 if (data->args.bitmask) {
6536 data->args.bitmask = NULL;
6537 data->res.fattr = NULL;
140087fd 6538 goto out_restart;
8ac2b422 6539 }
df561f66 6540 fallthrough;
79708861 6541 default:
e0dba012
TM		 6542 task->tk_status = nfs4_async_handle_exception(task,
6543 data->res.server, task->tk_status,
6544 &exception);
6545 if (exception.retry)
140087fd 6546 goto out_restart;
79708861 6547 }
d51f91d2 6548 nfs_delegation_mark_returned(data->inode, data->args.stateid);
79708861 6549 data->rpc_status = task->tk_status;
140087fd 6550 return;
140087fd
TM		 6551out_restart:
6552 task->tk_status = 0;
6553 rpc_restart_call_prepare(task);
fe650407
TM		 6554}
6555
6556static void nfs4_delegreturn_release(void *calldata)
6557{
039b756a 6558 struct nfs4_delegreturndata *data = calldata;
ea7c38fe 6559 struct inode *inode = data->inode;
039b756a 6560
078000d0
TM		 6561 if (data->lr.roc)
6562 pnfs_roc_release(&data->lr.arg, &data->lr.res,
6563 data->res.lr_ret);
ea7c38fe 6564 if (inode) {
0bc2c9b4 6565 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
ea7c38fe
TM		 6566 nfs_iput_and_deactive(inode);
6567 }
fe650407
TM		 6568 kfree(calldata);
6569}
6570
938e1010
AA		 6571static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
6572{
6573 struct nfs4_delegreturndata *d_data;
c8bf7073 6574 struct pnfs_layout_hdr *lo;
938e1010
AA		 6575
6576 d_data = (struct nfs4_delegreturndata *)data;
6577
5326de9e
TM		 6578 if (!d_data->lr.roc && nfs4_wait_on_layoutreturn(d_data->inode, task)) {
6579 nfs4_sequence_done(task, &d_data->res.seq_res);
500d701f 6580 return;
5326de9e 6581 }
500d701f 6582
c8bf7073
TM		 6583 lo = d_data->args.lr_args ? d_data->args.lr_args->layout : NULL;
6584 if (lo && !pnfs_layout_is_valid(lo)) {
6585 d_data->args.lr_args = NULL;
6586 d_data->res.lr_res = NULL;
6587 }
6588
42e1cca7 6589 nfs4_setup_sequence(d_data->res.server->nfs_client,
d9afbd1b
TM		 6590 &d_data->args.seq_args,
6591 &d_data->res.seq_res,
6592 task);
938e1010 6593}
938e1010 6594
c8d149f3 6595static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010 6596 .rpc_call_prepare = nfs4_delegreturn_prepare,
fe650407
TM		 6597 .rpc_call_done = nfs4_delegreturn_done,
6598 .rpc_release = nfs4_delegreturn_release,
6599};
6600
a52458b4 6601static int _nfs4_proc_delegreturn(struct inode *inode, const struct cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 6602{
6603 struct nfs4_delegreturndata *data;
fa178f29 6604 struct nfs_server *server = NFS_SERVER(inode);
fe650407 6605 struct rpc_task *task;
5138fde0
TM		 6606 struct rpc_message msg = {
6607 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
6608 .rpc_cred = cred,
6609 };
c970aa85
TM		 6610 struct rpc_task_setup task_setup_data = {
6611 .rpc_client = server->client,
5138fde0 6612 .rpc_message = &msg,
c970aa85 6613 .callback_ops = &nfs4_delegreturn_ops,
85e39fee 6614 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT | RPC_TASK_MOVEABLE,
c970aa85 6615 };
e6f81075 6616 int status = 0;
fe650407 6617
8535b2be 6618 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 6619 if (data == NULL)
6620 return -ENOMEM;
99ade3c7
AE		 6621
6622 nfs4_state_protect(server->nfs_client,
6623 NFS_SP4_MACH_CRED_CLEANUP,
6624 &task_setup_data.rpc_client, &msg);
6625
fe650407
TM		 6626 data->args.fhandle = &data->fh;
6627 data->args.stateid = &data->stateid;
332d1a03
TM		 6628 nfs4_bitmask_set(data->args.bitmask_store,
6629 server->cache_consistency_bitmask, inode, server,
6630 NULL);
6631 data->args.bitmask = data->args.bitmask_store;
fe650407 6632 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 6633 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 6634 data->res.fattr = &data->fattr;
6635 data->res.server = server;
586f1c39 6636 data->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
4d796d75 6637 data->lr.arg.ld_private = &data->lr.ld_private;
5138fde0 6638 nfs_fattr_init(data->res.fattr);
26e976a8 6639 data->timestamp = jiffies;
fe650407 6640 data->rpc_status = 0;
ea7c38fe 6641 data->inode = nfs_igrab_and_active(inode);
078000d0
TM		 6642 if (data->inode || issync) {
6643 data->lr.roc = pnfs_roc(inode, &data->lr.arg, &data->lr.res,
6644 cred);
1c5bd76d
TM		 6645 if (data->lr.roc) {
6646 data->args.lr_args = &data->lr.arg;
6647 data->res.lr_res = &data->lr.res;
6648 }
6649 }
fe650407 6650
dfe1fe75
TM		 6651 if (!data->inode)
6652 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1,
6653 1);
6654 else
6655 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1,
6656 0);
c970aa85 6657 task_setup_data.callback_data = data;
1174dd1f
TM		 6658 msg.rpc_argp = &data->args;
6659 msg.rpc_resp = &data->res;
c970aa85 6660 task = rpc_run_task(&task_setup_data);
7a1218a2 6661 if (IS_ERR(task))
fe650407 6662 return PTR_ERR(task);
e6f81075
TM		 6663 if (!issync)
6664 goto out;
820bf85c 6665 status = rpc_wait_for_completion_task(task);
e6f81075
TM		 6666 if (status != 0)
6667 goto out;
6668 status = data->rpc_status;
e6f81075 6669out:
e6b3c4db 6670 rpc_put_task(task);
fe650407 6671 return status;
1da177e4
LT		 6672}
6673
a52458b4 6674int nfs4_proc_delegreturn(struct inode *inode, const struct cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 6675{
6676 struct nfs_server *server = NFS_SERVER(inode);
6677 struct nfs4_exception exception = { };
6678 int err;
6679 do {
e6f81075 6680 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
48c9579a 6681 trace_nfs4_delegreturn(inode, stateid, err);
1da177e4
LT		 6682 switch (err) {
6683 case -NFS4ERR_STALE_STATEID:
6684 case -NFS4ERR_EXPIRED:
1da177e4
LT		 6685 case 0:
6686 return 0;
6687 }
6688 err = nfs4_handle_exception(server, err, &exception);
6689 } while (exception.retry);
6690 return err;
6691}
6692
1da177e4
LT		 6693static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6694{
6695 struct inode *inode = state->inode;
6696 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 6697 struct nfs_client *clp = server->nfs_client;
911d1aaf 6698 struct nfs_lockt_args arg = {
1da177e4 6699 .fh = NFS_FH(inode),
911d1aaf 6700 .fl = request,
1da177e4 6701 };
911d1aaf
TM		 6702 struct nfs_lockt_res res = {
6703 .denied = request,
1da177e4
LT		 6704 };
6705 struct rpc_message msg = {
6706 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
d9b67e1e
AS		 6707 .rpc_argp = &arg,
6708 .rpc_resp = &res,
1da177e4
LT		 6709 .rpc_cred = state->owner->so_cred,
6710 };
1da177e4
LT		 6711 struct nfs4_lock_state *lsp;
6712 int status;
6713
911d1aaf 6714 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 6715 status = nfs4_set_lock_state(state, request);
6716 if (status != 0)
6717 goto out;
6718 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 6719 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 6720 arg.lock_owner.s_dev = server->s_dev;
7c513058 6721 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 6722 switch (status) {
6723 case 0:
6724 request->fl_type = F_UNLCK;
6725 break;
6726 case -NFS4ERR_DENIED:
6727 status = 0;
1da177e4 6728 }
70cc6487 6729 request->fl_ops->fl_release_private(request);
a6f951dd 6730 request->fl_ops = NULL;
8d0a8a9d 6731out:
1da177e4
LT		 6732 return status;
6733}
6734
6735static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6736{
0688e64b
TM		 6737 struct nfs4_exception exception = {
6738 .interruptible = true,
6739 };
1da177e4
LT		 6740 int err;
6741
6742 do {
d1b748a5
TM		 6743 err = _nfs4_proc_getlk(state, cmd, request);
6744 trace_nfs4_get_lock(request, state, cmd, err);
6745 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
1da177e4
LT		 6746 &exception);
6747 } while (exception.retry);
6748 return err;
6749}
6750
32c6e7ee
TM		 6751/*
6752 * Update the seqid of a lock stateid after receiving
6753 * NFS4ERR_OLD_STATEID
6754 */
6755static bool nfs4_refresh_lock_old_stateid(nfs4_stateid *dst,
6756 struct nfs4_lock_state *lsp)
6757{
6758 struct nfs4_state *state = lsp->ls_state;
6759 bool ret = false;
6760
6761 spin_lock(&state->state_lock);
6762 if (!nfs4_stateid_match_other(dst, &lsp->ls_stateid))
6763 goto out;
6764 if (!nfs4_stateid_is_newer(&lsp->ls_stateid, dst))
6765 nfs4_stateid_seqid_inc(dst);
6766 else
6767 dst->seqid = lsp->ls_stateid.seqid;
6768 ret = true;
6769out:
6770 spin_unlock(&state->state_lock);
6771 return ret;
6772}
6773
6774static bool nfs4_sync_lock_stateid(nfs4_stateid *dst,
6775 struct nfs4_lock_state *lsp)
6776{
6777 struct nfs4_state *state = lsp->ls_state;
6778 bool ret;
6779
6780 spin_lock(&state->state_lock);
6781 ret = !nfs4_stateid_match_other(dst, &lsp->ls_stateid);
6782 nfs4_stateid_copy(dst, &lsp->ls_stateid);
6783 spin_unlock(&state->state_lock);
6784 return ret;
6785}
6786
faf5f49c 6787struct nfs4_unlockdata {
911d1aaf
TM		 6788 struct nfs_locku_args arg;
6789 struct nfs_locku_res res;
faf5f49c
TM		 6790 struct nfs4_lock_state *lsp;
6791 struct nfs_open_context *ctx;
f30cb757 6792 struct nfs_lock_context *l_ctx;
911d1aaf 6793 struct file_lock fl;
516285eb 6794 struct nfs_server *server;
26e976a8 6795 unsigned long timestamp;
faf5f49c
TM		 6796};
6797
911d1aaf
TM		 6798static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
6799 struct nfs_open_context *ctx,
6800 struct nfs4_lock_state *lsp,
6801 struct nfs_seqid *seqid)
6802{
6803 struct nfs4_unlockdata *p;
32c6e7ee
TM		 6804 struct nfs4_state *state = lsp->ls_state;
6805 struct inode *inode = state->inode;
911d1aaf 6806
8535b2be 6807 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 6808 if (p == NULL)
6809 return NULL;
6810 p->arg.fh = NFS_FH(inode);
6811 p->arg.fl = &p->fl;
6812 p->arg.seqid = seqid;
c1d51931 6813 p->res.seqid = seqid;
911d1aaf 6814 p->lsp = lsp;
911d1aaf
TM		 6815 /* Ensure we don't close file until we're done freeing locks! */
6816 p->ctx = get_nfs_open_context(ctx);
f30cb757 6817 p->l_ctx = nfs_get_lock_context(ctx);
7b587e1a
N		 6818 locks_init_lock(&p->fl);
6819 locks_copy_lock(&p->fl, fl);
911d1aaf 6820 p->server = NFS_SERVER(inode);
32c6e7ee
TM		 6821 spin_lock(&state->state_lock);
6822 nfs4_stateid_copy(&p->arg.stateid, &lsp->ls_stateid);
6823 spin_unlock(&state->state_lock);
911d1aaf
TM		 6824 return p;
6825}
6826
06f814a3 6827static void nfs4_locku_release_calldata(void *data)
faf5f49c 6828{
963d8fe5 6829 struct nfs4_unlockdata *calldata = data;
911d1aaf 6830 nfs_free_seqid(calldata->arg.seqid);
06f814a3 6831 nfs4_put_lock_state(calldata->lsp);
f30cb757 6832 nfs_put_lock_context(calldata->l_ctx);
06f814a3
TM		 6833 put_nfs_open_context(calldata->ctx);
6834 kfree(calldata);
faf5f49c
TM		 6835}
6836
963d8fe5 6837static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 6838{
963d8fe5 6839 struct nfs4_unlockdata *calldata = data;
82571552
TM		 6840 struct nfs4_exception exception = {
6841 .inode = calldata->lsp->ls_state->inode,
6842 .stateid = &calldata->arg.stateid,
6843 };
faf5f49c 6844
14516c3a
TM		 6845 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
6846 return;
faf5f49c
TM		 6847 switch (task->tk_status) {
6848 case 0:
26e976a8 6849 renew_lease(calldata->server, calldata->timestamp);
75575ddf 6850 locks_lock_inode_wait(calldata->lsp->ls_state->inode, &calldata->fl);
c69899a1
TM		 6851 if (nfs4_update_lock_stateid(calldata->lsp,
6852 &calldata->res.stateid))
6853 break;
df561f66 6854 fallthrough;
26d36301
TM		 6855 case -NFS4ERR_ADMIN_REVOKED:
6856 case -NFS4ERR_EXPIRED:
6857 nfs4_free_revoked_stateid(calldata->server,
6858 &calldata->arg.stateid,
6859 task->tk_msg.rpc_cred);
df561f66 6860 fallthrough;
9e33bed5 6861 case -NFS4ERR_BAD_STATEID:
faf5f49c 6862 case -NFS4ERR_STALE_STATEID:
32c6e7ee
TM		 6863 if (nfs4_sync_lock_stateid(&calldata->arg.stateid,
6864 calldata->lsp))
6865 rpc_restart_call_prepare(task);
6866 break;
6867 case -NFS4ERR_OLD_STATEID:
6868 if (nfs4_refresh_lock_old_stateid(&calldata->arg.stateid,
6869 calldata->lsp))
425c1d4e 6870 rpc_restart_call_prepare(task);
faf5f49c
TM		 6871 break;
6872 default:
82571552
TM		 6873 task->tk_status = nfs4_async_handle_exception(task,
6874 calldata->server, task->tk_status,
6875 &exception);
6876 if (exception.retry)
d00c5d43 6877 rpc_restart_call_prepare(task);
faf5f49c 6878 }
2b1bc308 6879 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 6880}
6881
4ce70ada 6882static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 6883{
4ce70ada 6884 struct nfs4_unlockdata *calldata = data;
faf5f49c 6885
f30cb757
BC		 6886 if (test_bit(NFS_CONTEXT_UNLOCK, &calldata->l_ctx->open_context->flags) &&
6887 nfs_async_iocounter_wait(task, calldata->l_ctx))
6888 return;
6889
911d1aaf 6890 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 6891 goto out_wait;
795a88c9 6892 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 6893 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 6894 goto out_no_action;
faf5f49c 6895 }
26e976a8 6896 calldata->timestamp = jiffies;
42e1cca7 6897 if (nfs4_setup_sequence(calldata->server->nfs_client,
a893693c 6898 &calldata->arg.seq_args,
2240a9e2
TM		 6899 &calldata->res.seq_res,
6900 task) != 0)
6901 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 6902 return;
6903out_no_action:
6904 task->tk_action = NULL;
6905out_wait:
6906 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 6907}
6908
963d8fe5 6909static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 6910 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 6911 .rpc_call_done = nfs4_locku_done,
06f814a3 6912 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 6913};
6914
a5d16a4d
TM		 6915static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
6916 struct nfs_open_context *ctx,
6917 struct nfs4_lock_state *lsp,
6918 struct nfs_seqid *seqid)
6919{
6920 struct nfs4_unlockdata *data;
5138fde0
TM		 6921 struct rpc_message msg = {
6922 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
6923 .rpc_cred = ctx->cred,
6924 };
c970aa85
TM		 6925 struct rpc_task_setup task_setup_data = {
6926 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 6927 .rpc_message = &msg,
c970aa85 6928 .callback_ops = &nfs4_locku_ops,
101070ca 6929 .workqueue = nfsiod_workqueue,
c970aa85
TM		 6930 .flags = RPC_TASK_ASYNC,
6931 };
85e39fee
OK		 6932 struct nfs_client *client =
6933 NFS_SERVER(lsp->ls_state->inode)->nfs_client;
6934
6935 if (client->cl_minorversion)
6936 task_setup_data.flags |= RPC_TASK_MOVEABLE;
a5d16a4d 6937
fa940720
WAA		 6938 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
6939 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
6940
137d6aca
FF		 6941 /* Ensure this is an unlock - when canceling a lock, the
6942 * canceled lock is passed in, and it won't be an unlock.
6943 */
6944 fl->fl_type = F_UNLCK;
f30cb757
BC		 6945 if (fl->fl_flags & FL_CLOSE)
6946 set_bit(NFS_CONTEXT_UNLOCK, &ctx->flags);
137d6aca 6947
a5d16a4d
TM		 6948 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
6949 if (data == NULL) {
6950 nfs_free_seqid(seqid);
6951 return ERR_PTR(-ENOMEM);
6952 }
6953
fba83f34 6954 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1, 0);
1174dd1f
TM		 6955 msg.rpc_argp = &data->arg;
6956 msg.rpc_resp = &data->res;
c970aa85
TM		 6957 task_setup_data.callback_data = data;
6958 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 6959}
6960
faf5f49c
TM		 6961static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
6962{
65b62a29
TM		 6963 struct inode *inode = state->inode;
6964 struct nfs4_state_owner *sp = state->owner;
6965 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 6966 struct nfs_seqid *seqid;
1da177e4 6967 struct nfs4_lock_state *lsp;
06f814a3 6968 struct rpc_task *task;
b4019c0e 6969 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
06f814a3 6970 int status = 0;
536ff0f8 6971 unsigned char fl_flags = request->fl_flags;
faf5f49c 6972
8d0a8a9d 6973 status = nfs4_set_lock_state(state, request);
9b073574
TM		 6974 /* Unlock _before_ we do the RPC call */
6975 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 6976 /* Exclude nfs_delegation_claim_locks() */
6977 mutex_lock(&sp->so_delegreturn_mutex);
6978 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57 6979 down_read(&nfsi->rwsem);
75575ddf 6980 if (locks_lock_inode_wait(inode, request) == -ENOENT) {
19e03c57 6981 up_read(&nfsi->rwsem);
65b62a29 6982 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 6983 goto out;
19e03c57
TM		 6984 }
6985 up_read(&nfsi->rwsem);
65b62a29 6986 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 6987 if (status != 0)
9b073574
TM		 6988 goto out;
6989 /* Is this a delegated lock? */
8d0a8a9d 6990 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 6991 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
6992 goto out;
b4019c0e
TM		 6993 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid;
6994 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 6995 status = -ENOMEM;
badc76dd 6996 if (IS_ERR(seqid))
9b073574 6997 goto out;
cd3758e3 6998 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 6999 status = PTR_ERR(task);
7000 if (IS_ERR(task))
9b073574 7001 goto out;
820bf85c 7002 status = rpc_wait_for_completion_task(task);
e6b3c4db 7003 rpc_put_task(task);
9b073574 7004out:
536ff0f8 7005 request->fl_flags = fl_flags;
d1b748a5 7006 trace_nfs4_unlock(request, state, F_SETLK, status);
1da177e4
LT		 7007 return status;
7008}
7009
a5d16a4d
TM		 7010struct nfs4_lockdata {
7011 struct nfs_lock_args arg;
7012 struct nfs_lock_res res;
7013 struct nfs4_lock_state *lsp;
7014 struct nfs_open_context *ctx;
7015 struct file_lock fl;
26e976a8 7016 unsigned long timestamp;
a5d16a4d
TM		 7017 int rpc_status;
7018 int cancelled;
66179efe 7019 struct nfs_server *server;
a5d16a4d
TM		 7020};
7021
7022static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 7023 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
7024 gfp_t gfp_mask)
1da177e4 7025{
a5d16a4d
TM		 7026 struct nfs4_lockdata *p;
7027 struct inode *inode = lsp->ls_state->inode;
1da177e4 7028 struct nfs_server *server = NFS_SERVER(inode);
b4019c0e 7029 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
a5d16a4d 7030
8535b2be 7031 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 7032 if (p == NULL)
7033 return NULL;
7034
7035 p->arg.fh = NFS_FH(inode);
7036 p->arg.fl = &p->fl;
8535b2be 7037 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
badc76dd 7038 if (IS_ERR(p->arg.open_seqid))
2f74c0a0 7039 goto out_free;
b4019c0e
TM		 7040 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
7041 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask);
badc76dd 7042 if (IS_ERR(p->arg.lock_seqid))
2f74c0a0 7043 goto out_free_seqid;
7539bbab 7044 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 7045 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 7046 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 7047 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 7048 p->lsp = lsp;
66179efe 7049 p->server = server;
a5d16a4d 7050 p->ctx = get_nfs_open_context(ctx);
7b587e1a
N		 7051 locks_init_lock(&p->fl);
7052 locks_copy_lock(&p->fl, fl);
a5d16a4d 7053 return p;
2f74c0a0
TM		 7054out_free_seqid:
7055 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 7056out_free:
7057 kfree(p);
7058 return NULL;
7059}
7060
7061static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
7062{
7063 struct nfs4_lockdata *data = calldata;
7064 struct nfs4_state *state = data->lsp->ls_state;
06735b34 7065
3110ff80 7066 dprintk("%s: begin!\n", __func__);
2f74c0a0 7067 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 7068 goto out_wait;
a5d16a4d 7069 /* Do we need to do an open_to_lock_owner? */
6b447539 7070 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) {
8fe72bac 7071 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 7072 goto out_release_lock_seqid;
8fe72bac 7073 }
425c1d4e
TM		 7074 nfs4_stateid_copy(&data->arg.open_stateid,
7075 &state->open_stateid);
a5d16a4d 7076 data->arg.new_lock_owner = 1;
c1d51931 7077 data->res.open_seqid = data->arg.open_seqid;
425c1d4e 7078 } else {
2f74c0a0 7079 data->arg.new_lock_owner = 0;
425c1d4e
TM		 7080 nfs4_stateid_copy(&data->arg.lock_stateid,
7081 &data->lsp->ls_stateid);
7082 }
5d422301
TM		 7083 if (!nfs4_valid_open_stateid(state)) {
7084 data->rpc_status = -EBADF;
7085 task->tk_action = NULL;
7086 goto out_release_open_seqid;
7087 }
26e976a8 7088 data->timestamp = jiffies;
42e1cca7 7089 if (nfs4_setup_sequence(data->server->nfs_client,
035168ab 7090 &data->arg.seq_args,
2240a9e2 7091 &data->res.seq_res,
d9afbd1b 7092 task) == 0)
66179efe 7093 return;
5d422301 7094out_release_open_seqid:
2240a9e2
TM		 7095 nfs_release_seqid(data->arg.open_seqid);
7096out_release_lock_seqid:
7097 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 7098out_wait:
7099 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 7100 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 7101}
7102
a5d16a4d
TM		 7103static void nfs4_lock_done(struct rpc_task *task, void *calldata)
7104{
7105 struct nfs4_lockdata *data = calldata;
39071e6f 7106 struct nfs4_lock_state *lsp = data->lsp;
a5d16a4d 7107
3110ff80 7108 dprintk("%s: begin!\n", __func__);
a5d16a4d 7109
14516c3a
TM		 7110 if (!nfs4_sequence_done(task, &data->res.seq_res))
7111 return;
66179efe 7112
a5d16a4d 7113 data->rpc_status = task->tk_status;
425c1d4e
TM		 7114 switch (task->tk_status) {
7115 case 0:
2b0143b5 7116 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)),
39071e6f 7117 data->timestamp);
a3cf9bca 7118 if (data->arg.new_lock && !data->cancelled) {
c69899a1 7119 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS);
a3cf9bca 7120 if (locks_lock_inode_wait(lsp->ls_state->inode, &data->fl) < 0)
6ea76bf5 7121 goto out_restart;
c69899a1 7122 }
39071e6f
TM		 7123 if (data->arg.new_lock_owner != 0) {
7124 nfs_confirm_seqid(&lsp->ls_seqid, 0);
7125 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid);
7126 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
6ea76bf5
TM		 7127 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid))
7128 goto out_restart;
425c1d4e
TM		 7129 break;
7130 case -NFS4ERR_BAD_STATEID:
7131 case -NFS4ERR_OLD_STATEID:
7132 case -NFS4ERR_STALE_STATEID:
7133 case -NFS4ERR_EXPIRED:
7134 if (data->arg.new_lock_owner != 0) {
6ea76bf5 7135 if (!nfs4_stateid_match(&data->arg.open_stateid,
425c1d4e 7136 &lsp->ls_state->open_stateid))
6ea76bf5
TM		 7137 goto out_restart;
7138 } else if (!nfs4_stateid_match(&data->arg.lock_stateid,
425c1d4e 7139 &lsp->ls_stateid))
6ea76bf5 7140 goto out_restart;
a5d16a4d 7141 }
a3cf9bca 7142out_done:
3110ff80 7143 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
6ea76bf5
TM		 7144 return;
7145out_restart:
7146 if (!data->cancelled)
7147 rpc_restart_call_prepare(task);
7148 goto out_done;
a5d16a4d
TM		 7149}
7150
7151static void nfs4_lock_release(void *calldata)
7152{
7153 struct nfs4_lockdata *data = calldata;
7154
3110ff80 7155 dprintk("%s: begin!\n", __func__);
2f74c0a0 7156 nfs_free_seqid(data->arg.open_seqid);
6ea76bf5 7157 if (data->cancelled && data->rpc_status == 0) {
a5d16a4d
TM		 7158 struct rpc_task *task;
7159 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
7160 data->arg.lock_seqid);
7161 if (!IS_ERR(task))
bf294b41 7162 rpc_put_task_async(task);
3110ff80 7163 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 7164 } else
7165 nfs_free_seqid(data->arg.lock_seqid);
7166 nfs4_put_lock_state(data->lsp);
7167 put_nfs_open_context(data->ctx);
7168 kfree(data);
3110ff80 7169 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 7170}
7171
7172static const struct rpc_call_ops nfs4_lock_ops = {
7173 .rpc_call_prepare = nfs4_lock_prepare,
7174 .rpc_call_done = nfs4_lock_done,
7175 .rpc_release = nfs4_lock_release,
7176};
7177
2bee72a6
TM		 7178static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
7179{
2bee72a6
TM		 7180 switch (error) {
7181 case -NFS4ERR_ADMIN_REVOKED:
d7f3e4bf 7182 case -NFS4ERR_EXPIRED:
2bee72a6 7183 case -NFS4ERR_BAD_STATEID:
ecac799a 7184 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 7185 if (new_lock_owner != 0 ||
795a88c9 7186 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 7187 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 7188 break;
7189 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 7190 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a 7191 nfs4_schedule_lease_recovery(server->nfs_client);
8b98a532 7192 }
2bee72a6
TM		 7193}
7194
afe6c27c 7195static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 7196{
7197 struct nfs4_lockdata *data;
7198 struct rpc_task *task;
5138fde0
TM		 7199 struct rpc_message msg = {
7200 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
7201 .rpc_cred = state->owner->so_cred,
7202 };
c970aa85
TM		 7203 struct rpc_task_setup task_setup_data = {
7204 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 7205 .rpc_message = &msg,
c970aa85 7206 .callback_ops = &nfs4_lock_ops,
101070ca 7207 .workqueue = nfsiod_workqueue,
61296507 7208 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF,
c970aa85 7209 };
a5d16a4d 7210 int ret;
85e39fee
OK		 7211 struct nfs_client *client = NFS_SERVER(state->inode)->nfs_client;
7212
7213 if (client->cl_minorversion)
7214 task_setup_data.flags |= RPC_TASK_MOVEABLE;
a5d16a4d 7215
3110ff80 7216 dprintk("%s: begin!\n", __func__);
cd3758e3 7217 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 7218 fl->fl_u.nfs4_fl.owner,
7219 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 7220 if (data == NULL)
7221 return -ENOMEM;
7222 if (IS_SETLKW(cmd))
7223 data->arg.block = 1;
fba83f34
AS		 7224 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1,
7225 recovery_type > NFS_LOCK_NEW);
1174dd1f
TM		 7226 msg.rpc_argp = &data->arg;
7227 msg.rpc_resp = &data->res;
c970aa85 7228 task_setup_data.callback_data = data;
8fe72bac
TM		 7229 if (recovery_type > NFS_LOCK_NEW) {
7230 if (recovery_type == NFS_LOCK_RECLAIM)
7231 data->arg.reclaim = NFS_LOCK_RECLAIM;
c69899a1
TM		 7232 } else
7233 data->arg.new_lock = 1;
c970aa85 7234 task = rpc_run_task(&task_setup_data);
7a1218a2 7235 if (IS_ERR(task))
a5d16a4d 7236 return PTR_ERR(task);
820bf85c 7237 ret = rpc_wait_for_completion_task(task);
a5d16a4d
TM		 7238 if (ret == 0) {
7239 ret = data->rpc_status;
2bee72a6
TM		 7240 if (ret)
7241 nfs4_handle_setlk_error(data->server, data->lsp,
7242 data->arg.new_lock_owner, ret);
a5d16a4d 7243 } else
a7a3b1e9 7244 data->cancelled = true;
3d1a90ab 7245 trace_nfs4_set_lock(fl, state, &data->res.stateid, cmd, ret);
e6b3c4db 7246 rpc_put_task(task);
3110ff80 7247 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 7248 return ret;
1da177e4
LT		 7249}
7250
7251static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
7252{
202b50dc 7253 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 7254 struct nfs4_exception exception = {
7255 .inode = state->inode,
7256 };
202b50dc
TM		 7257 int err;
7258
7259 do {
42a2d13e
TM		 7260 /* Cache the lock if possible... */
7261 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
7262 return 0;
afe6c27c 7263 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 7264 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 7265 break;
7266 nfs4_handle_exception(server, err, &exception);
7267 } while (exception.retry);
7268 return err;
1da177e4
LT		 7269}
7270
7271static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
7272{
202b50dc 7273 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 7274 struct nfs4_exception exception = {
7275 .inode = state->inode,
7276 };
202b50dc
TM		 7277 int err;
7278
6bfc93ef
TM		 7279 err = nfs4_set_lock_state(state, request);
7280 if (err != 0)
7281 return err;
f6de7a39 7282 if (!recover_lost_locks) {
ef1820f9
N		 7283 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
7284 return 0;
7285 }
202b50dc 7286 do {
42a2d13e
TM		 7287 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
7288 return 0;
afe6c27c 7289 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 7290 switch (err) {
7291 default:
7292 goto out;
7293 case -NFS4ERR_GRACE:
7294 case -NFS4ERR_DELAY:
7295 nfs4_handle_exception(server, err, &exception);
7296 err = 0;
7297 }
202b50dc 7298 } while (exception.retry);
a9ed2e25 7299out:
202b50dc 7300 return err;
1da177e4
LT		 7301}
7302
f062eb6c 7303#if defined(CONFIG_NFS_V4_1)
b01dd1d8
BS		 7304static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
7305{
c5896fc8
TM		 7306 struct nfs4_lock_state *lsp;
7307 int status;
b01dd1d8 7308
c5896fc8
TM		 7309 status = nfs4_set_lock_state(state, request);
7310 if (status != 0)
7311 return status;
7312 lsp = request->fl_u.nfs4_fl.owner;
7313 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) ||
7314 test_bit(NFS_LOCK_LOST, &lsp->ls_flags))
7315 return 0;
81b68de4 7316 return nfs4_lock_expired(state, request);
f062eb6c
BS		 7317}
7318#endif
7319
1da177e4
LT		 7320static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
7321{
19e03c57 7322 struct nfs_inode *nfsi = NFS_I(state->inode);
11476e9d 7323 struct nfs4_state_owner *sp = state->owner;
01c3b861 7324 unsigned char fl_flags = request->fl_flags;
1ea67dbd 7325 int status;
1da177e4 7326
01c3b861 7327 request->fl_flags |= FL_ACCESS;
75575ddf 7328 status = locks_lock_inode_wait(state->inode, request);
01c3b861
TM		 7329 if (status < 0)
7330 goto out;
11476e9d 7331 mutex_lock(&sp->so_delegreturn_mutex);
19e03c57 7332 down_read(&nfsi->rwsem);
01c3b861 7333 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 7334 /* Yes: cache locks! */
01c3b861 7335 /* ...but avoid races with delegation recall... */
19e03c57 7336 request->fl_flags = fl_flags & ~FL_SLEEP;
75575ddf 7337 status = locks_lock_inode_wait(state->inode, request);
c69899a1 7338 up_read(&nfsi->rwsem);
11476e9d 7339 mutex_unlock(&sp->so_delegreturn_mutex);
9a99af49 7340 goto out;
9a99af49 7341 }
19e03c57 7342 up_read(&nfsi->rwsem);
11476e9d 7343 mutex_unlock(&sp->so_delegreturn_mutex);
c69899a1 7344 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
01c3b861
TM		 7345out:
7346 request->fl_flags = fl_flags;
1da177e4
LT		 7347 return status;
7348}
7349
7350static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
7351{
a1d0b5ee
TM		 7352 struct nfs4_exception exception = {
7353 .state = state,
05ffe24f 7354 .inode = state->inode,
0688e64b 7355 .interruptible = true,
a1d0b5ee 7356 };
1da177e4
LT		 7357 int err;
7358
7359 do {
965b5d67
TM		 7360 err = _nfs4_proc_setlk(state, cmd, request);
7361 if (err == -NFS4ERR_DENIED)
7362 err = -EAGAIN;
1da177e4 7363 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 7364 err, &exception);
1da177e4
LT		 7365 } while (exception.retry);
7366 return err;
7367}
7368
d2f3a7f9
JL		 7369#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
7370#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
7371
7372static int
a1d617d8
JL		 7373nfs4_retry_setlk_simple(struct nfs4_state *state, int cmd,
7374 struct file_lock *request)
d2f3a7f9
JL		 7375{
7376 int status = -ERESTARTSYS;
7377 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
7378
7379 while(!signalled()) {
7380 status = nfs4_proc_setlk(state, cmd, request);
7381 if ((status != -EAGAIN) || IS_SETLK(cmd))
7382 break;
7383 freezable_schedule_timeout_interruptible(timeout);
7384 timeout *= 2;
7385 timeout = min_t(unsigned long, NFS4_LOCK_MAXTIMEOUT, timeout);
7386 status = -ERESTARTSYS;
7387 }
7388 return status;
7389}
7390
a1d617d8
JL		 7391#ifdef CONFIG_NFS_V4_1
7392struct nfs4_lock_waiter {
a1d617d8 7393 struct inode *inode;
86438186
TM		 7394 struct nfs_lowner owner;
7395 wait_queue_entry_t wait;
a1d617d8
JL		 7396};
7397
7398static int
ac6424b9 7399nfs4_wake_lock_waiter(wait_queue_entry_t *wait, unsigned int mode, int flags, void *key)
a1d617d8 7400{
86438186
TM		 7401 struct nfs4_lock_waiter *waiter =
7402 container_of(wait, struct nfs4_lock_waiter, wait);
a1d617d8 7403
57174593
JL		 7404 /* NULL key means to wake up everyone */
7405 if (key) {
7406 struct cb_notify_lock_args *cbnl = key;
7407 struct nfs_lowner *lowner = &cbnl->cbnl_owner,
86438186 7408 *wowner = &waiter->owner;
a1d617d8 7409
57174593
JL		 7410 /* Only wake if the callback was for the same owner. */
7411 if (lowner->id != wowner->id || lowner->s_dev != wowner->s_dev)
7412 return 0;
a1d617d8 7413
57174593
JL		 7414 /* Make sure it's for the right inode */
7415 if (nfs_compare_fh(NFS_FH(waiter->inode), &cbnl->cbnl_fh))
7416 return 0;
57174593 7417 }
a1d617d8 7418
86438186 7419 return woken_wake_function(wait, mode, flags, key);
a1d617d8
JL		 7420}
7421
7422static int
7423nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
7424{
a1d617d8
JL		 7425 struct nfs4_lock_state *lsp = request->fl_u.nfs4_fl.owner;
7426 struct nfs_server *server = NFS_SERVER(state->inode);
7427 struct nfs_client *clp = server->nfs_client;
7428 wait_queue_head_t *q = &clp->cl_lock_waitq;
86438186
TM		 7429 struct nfs4_lock_waiter waiter = {
7430 .inode = state->inode,
7431 .owner = { .clientid = clp->cl_clientid,
7432 .id = lsp->ls_seqid.owner_id,
7433 .s_dev = server->s_dev },
7434 };
7435 int status;
a1d617d8
JL		 7436
7437 /* Don't bother with waitqueue if we don't expect a callback */
7438 if (!test_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags))
7439 return nfs4_retry_setlk_simple(state, cmd, request);
7440
86438186
TM		 7441 init_wait(&waiter.wait);
7442 waiter.wait.func = nfs4_wake_lock_waiter;
7443 add_wait_queue(q, &waiter.wait);
a1d617d8 7444
86438186 7445 do {
a1d617d8 7446 status = nfs4_proc_setlk(state, cmd, request);
86438186 7447 if (status != -EAGAIN || IS_SETLK(cmd))
a1d617d8
JL		 7448 break;
7449
7450 status = -ERESTARTSYS;
52b042ab 7451 freezer_do_not_count();
86438186
TM		 7452 wait_woken(&waiter.wait, TASK_INTERRUPTIBLE,
7453 NFS4_LOCK_MAXTIMEOUT);
52b042ab 7454 freezer_count();
86438186
TM		 7455 } while (!signalled());
7456
7457 remove_wait_queue(q, &waiter.wait);
a1d617d8 7458
a1d617d8
JL		 7459 return status;
7460}
7461#else /* !CONFIG_NFS_V4_1 */
7462static inline int
7463nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
7464{
7465 return nfs4_retry_setlk_simple(state, cmd, request);
7466}
7467#endif
7468
1da177e4
LT		 7469static int
7470nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
7471{
7472 struct nfs_open_context *ctx;
7473 struct nfs4_state *state;
1da177e4
LT		 7474 int status;
7475
7476 /* verify open state */
cd3758e3 7477 ctx = nfs_file_open_context(filp);
1da177e4
LT		 7478 state = ctx->state;
7479
d953126a
TM		 7480 if (IS_GETLK(cmd)) {
7481 if (state != NULL)
7482 return nfs4_proc_getlk(state, F_GETLK, request);
7483 return 0;
7484 }
1da177e4
LT		 7485
7486 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
7487 return -EINVAL;
7488
d953126a
TM		 7489 if (request->fl_type == F_UNLCK) {
7490 if (state != NULL)
7491 return nfs4_proc_unlck(state, cmd, request);
7492 return 0;
7493 }
1da177e4 7494
d953126a
TM		 7495 if (state == NULL)
7496 return -ENOLCK;
1ea67dbd
JL		 7497
7498 if ((request->fl_flags & FL_POSIX) &&
7499 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
7500 return -ENOLCK;
7501
fcfa4470
BC		 7502 /*
7503 * Don't rely on the VFS having checked the file open mode,
7504 * since it won't do this for flock() locks.
7505 */
7506 switch (request->fl_type) {
7507 case F_RDLCK:
7508 if (!(filp->f_mode & FMODE_READ))
7509 return -EBADF;
7510 break;
7511 case F_WRLCK:
7512 if (!(filp->f_mode & FMODE_WRITE))
7513 return -EBADF;
7514 }
7515
1ea67dbd
JL		 7516 status = nfs4_set_lock_state(state, request);
7517 if (status != 0)
7518 return status;
7519
d2f3a7f9 7520 return nfs4_retry_setlk(state, cmd, request);
1da177e4
LT		 7521}
7522
e93a5e93
TM		 7523static int nfs4_delete_lease(struct file *file, void **priv)
7524{
7525 return generic_setlease(file, F_UNLCK, NULL, priv);
7526}
7527
7528static int nfs4_add_lease(struct file *file, long arg, struct file_lock **lease,
7529 void **priv)
7530{
7531 struct inode *inode = file_inode(file);
7532 fmode_t type = arg == F_RDLCK ? FMODE_READ : FMODE_WRITE;
7533 int ret;
7534
7535 /* No delegation, no lease */
7536 if (!nfs4_have_delegation(inode, type))
df2c7b95 7537 return -EAGAIN;
e93a5e93
TM		 7538 ret = generic_setlease(file, arg, lease, priv);
7539 if (ret || nfs4_have_delegation(inode, type))
7540 return ret;
7541 /* We raced with a delegation return */
7542 nfs4_delete_lease(file, priv);
df2c7b95 7543 return -EAGAIN;
e93a5e93
TM		 7544}
7545
7546int nfs4_proc_setlease(struct file *file, long arg, struct file_lock **lease,
7547 void **priv)
7548{
7549 switch (arg) {
7550 case F_RDLCK:
7551 case F_WRLCK:
7552 return nfs4_add_lease(file, arg, lease, priv);
7553 case F_UNLCK:
7554 return nfs4_delete_lease(file, priv);
7555 default:
7556 return -EINVAL;
7557 }
7558}
7559
db4f2e63 7560int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 7561{
7562 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 7563 int err;
7564
7565 err = nfs4_set_lock_state(state, fl);
7566 if (err != 0)
db4f2e63 7567 return err;
3d7a9520
OK		 7568 do {
7569 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
7570 if (err != -NFS4ERR_DELAY)
7571 break;
7572 ssleep(1);
7573 } while (err == -NFS4ERR_DELAY);
dce2630c 7574 return nfs4_handle_delegation_recall_error(server, state, stateid, fl, err);
888e694c 7575}
6b3b5496 7576
cf470c3e
TM		 7577struct nfs_release_lockowner_data {
7578 struct nfs4_lock_state *lsp;
5ae67c4f 7579 struct nfs_server *server;
cf470c3e 7580 struct nfs_release_lockowner_args args;
b7e63a10 7581 struct nfs_release_lockowner_res res;
60ea6812 7582 unsigned long timestamp;
cf470c3e
TM		 7583};
7584
fbd4bfd1
CL		 7585static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
7586{
7587 struct nfs_release_lockowner_data *data = calldata;
5b53dc88 7588 struct nfs_server *server = data->server;
7981c8a6
AS		 7589 nfs4_setup_sequence(server->nfs_client, &data->args.seq_args,
7590 &data->res.seq_res, task);
5b53dc88 7591 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
60ea6812 7592 data->timestamp = jiffies;
fbd4bfd1
CL		 7593}
7594
7595static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
7596{
7597 struct nfs_release_lockowner_data *data = calldata;
60ea6812
CL		 7598 struct nfs_server *server = data->server;
7599
b7e63a10 7600 nfs40_sequence_done(task, &data->res.seq_res);
60ea6812
CL		 7601
7602 switch (task->tk_status) {
7603 case 0:
7604 renew_lease(server, data->timestamp);
7605 break;
7606 case -NFS4ERR_STALE_CLIENTID:
7607 case -NFS4ERR_EXPIRED:
5b53dc88
KM		 7608 nfs4_schedule_lease_recovery(server->nfs_client);
7609 break;
60ea6812
CL		 7610 case -NFS4ERR_LEASE_MOVED:
7611 case -NFS4ERR_DELAY:
8478eaa1
N		 7612 if (nfs4_async_handle_error(task, server,
7613 NULL, NULL) == -EAGAIN)
60ea6812
CL		 7614 rpc_restart_call_prepare(task);
7615 }
fbd4bfd1
CL		 7616}
7617
d3c7b7cc
TM		 7618static void nfs4_release_lockowner_release(void *calldata)
7619{
cf470c3e 7620 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 7621 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 7622 kfree(calldata);
7623}
7624
17280175 7625static const struct rpc_call_ops nfs4_release_lockowner_ops = {
fbd4bfd1
CL		 7626 .rpc_call_prepare = nfs4_release_lockowner_prepare,
7627 .rpc_call_done = nfs4_release_lockowner_done,
d3c7b7cc
TM		 7628 .rpc_release = nfs4_release_lockowner_release,
7629};
7630
f1cdae87
JL		 7631static void
7632nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 7633{
cf470c3e 7634 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 7635 struct rpc_message msg = {
7636 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
7637 };
7638
7639 if (server->nfs_client->cl_mvops->minor_version != 0)
f1cdae87 7640 return;
fbd4bfd1 7641
cf470c3e
TM		 7642 data = kmalloc(sizeof(*data), GFP_NOFS);
7643 if (!data)
f1cdae87 7644 return;
cf470c3e 7645 data->lsp = lsp;
5ae67c4f 7646 data->server = server;
cf470c3e
TM		 7647 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
7648 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
7649 data->args.lock_owner.s_dev = server->s_dev;
fbd4bfd1 7650
cf470c3e 7651 msg.rpc_argp = &data->args;
b7e63a10 7652 msg.rpc_resp = &data->res;
fba83f34 7653 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0, 0);
cf470c3e 7654 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
d3c7b7cc
TM		 7655}
7656
aa1870af
BF		 7657#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
7658
d9a82a04 7659static int nfs4_xattr_set_nfs4_acl(const struct xattr_handler *handler,
e65ce2a5 7660 struct user_namespace *mnt_userns,
59301226
AV		 7661 struct dentry *unused, struct inode *inode,
7662 const char *key, const void *buf,
7663 size_t buflen, int flags)
6b3b5496 7664{
59301226 7665 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 7666}
7667
d9a82a04 7668static int nfs4_xattr_get_nfs4_acl(const struct xattr_handler *handler,
b296821a
AV		 7669 struct dentry *unused, struct inode *inode,
7670 const char *key, void *buf, size_t buflen)
6b3b5496 7671{
b296821a 7672 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 7673}
7674
764a5c6b 7675static bool nfs4_xattr_list_nfs4_acl(struct dentry *dentry)
6b3b5496 7676{
764a5c6b 7677 return nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry)));
6b3b5496
BF		 7678}
7679
c9bccef6 7680#ifdef CONFIG_NFS_V4_SECURITY_LABEL
c9bccef6 7681
d9a82a04 7682static int nfs4_xattr_set_nfs4_label(const struct xattr_handler *handler,
e65ce2a5 7683 struct user_namespace *mnt_userns,
59301226
AV		 7684 struct dentry *unused, struct inode *inode,
7685 const char *key, const void *buf,
7686 size_t buflen, int flags)
c9bccef6
DQ		 7687{
7688 if (security_ismaclabel(key))
59301226 7689 return nfs4_set_security_label(inode, buf, buflen);
c9bccef6
DQ		 7690
7691 return -EOPNOTSUPP;
7692}
7693
d9a82a04 7694static int nfs4_xattr_get_nfs4_label(const struct xattr_handler *handler,
b296821a
AV		 7695 struct dentry *unused, struct inode *inode,
7696 const char *key, void *buf, size_t buflen)
c9bccef6
DQ		 7697{
7698 if (security_ismaclabel(key))
b296821a 7699 return nfs4_get_security_label(inode, buf, buflen);
c9bccef6
DQ		 7700 return -EOPNOTSUPP;
7701}
7702
c4803c49
AG		 7703static ssize_t
7704nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
c9bccef6 7705{
c4803c49 7706 int len = 0;
c9bccef6 7707
c4803c49
AG		 7708 if (nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) {
7709 len = security_inode_listsecurity(inode, list, list_len);
82c596eb 7710 if (len >= 0 && list_len && len > list_len)
c4803c49 7711 return -ERANGE;
c9bccef6
DQ		 7712 }
7713 return len;
7714}
7715
7716static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
7717 .prefix = XATTR_SECURITY_PREFIX,
c9bccef6
DQ		 7718 .get = nfs4_xattr_get_nfs4_label,
7719 .set = nfs4_xattr_set_nfs4_label,
7720};
c9bccef6 7721
c4803c49
AG		 7722#else
7723
7724static ssize_t
7725nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
7726{
7727 return 0;
7728}
7729
7730#endif
c9bccef6 7731
012a211a
FL		 7732#ifdef CONFIG_NFS_V4_2
7733static int nfs4_xattr_set_nfs4_user(const struct xattr_handler *handler,
e65ce2a5 7734 struct user_namespace *mnt_userns,
012a211a
FL		 7735 struct dentry *unused, struct inode *inode,
7736 const char *key, const void *buf,
7737 size_t buflen, int flags)
7738{
0ddcf42b 7739 u32 mask;
95ad37f9 7740 int ret;
012a211a
FL		 7741
7742 if (!nfs_server_capable(inode, NFS_CAP_XATTR))
7743 return -EOPNOTSUPP;
7744
7745 /*
7746 * There is no mapping from the MAY_* flags to the NFS_ACCESS_XA*
7747 * flags right now. Handling of xattr operations use the normal
7748 * file read/write permissions.
7749 *
7750 * Just in case the server has other ideas (which RFC 8276 allows),
7751 * do a cached access check for the XA* flags to possibly avoid
7752 * doing an RPC and getting EACCES back.
7753 */
0ddcf42b
N		 7754 if (!nfs_access_get_cached(inode, current_cred(), &mask, true)) {
7755 if (!(mask & NFS_ACCESS_XAWRITE))
012a211a
FL		 7756 return -EACCES;
7757 }
7758
95ad37f9
FL		 7759 if (buf == NULL) {
7760 ret = nfs42_proc_removexattr(inode, key);
7761 if (!ret)
7762 nfs4_xattr_cache_remove(inode, key);
7763 } else {
7764 ret = nfs42_proc_setxattr(inode, key, buf, buflen, flags);
7765 if (!ret)
7766 nfs4_xattr_cache_add(inode, key, buf, NULL, buflen);
7767 }
7768
7769 return ret;
012a211a
FL		 7770}
7771
7772static int nfs4_xattr_get_nfs4_user(const struct xattr_handler *handler,
7773 struct dentry *unused, struct inode *inode,
7774 const char *key, void *buf, size_t buflen)
7775{
0ddcf42b 7776 u32 mask;
95ad37f9 7777 ssize_t ret;
012a211a
FL		 7778
7779 if (!nfs_server_capable(inode, NFS_CAP_XATTR))
7780 return -EOPNOTSUPP;
7781
0ddcf42b
N		 7782 if (!nfs_access_get_cached(inode, current_cred(), &mask, true)) {
7783 if (!(mask & NFS_ACCESS_XAREAD))
012a211a
FL		 7784 return -EACCES;
7785 }
7786
1f3208b2 7787 ret = nfs_revalidate_inode(inode, NFS_INO_INVALID_CHANGE);
95ad37f9
FL		 7788 if (ret)
7789 return ret;
7790
7791 ret = nfs4_xattr_cache_get(inode, key, buf, buflen);
7792 if (ret >= 0 || (ret < 0 && ret != -ENOENT))
7793 return ret;
7794
7795 ret = nfs42_proc_getxattr(inode, key, buf, buflen);
7796
7797 return ret;
012a211a
FL		 7798}
7799
7800static ssize_t
7801nfs4_listxattr_nfs4_user(struct inode *inode, char *list, size_t list_len)
7802{
7803 u64 cookie;
7804 bool eof;
95ad37f9 7805 ssize_t ret, size;
012a211a
FL		 7806 char *buf;
7807 size_t buflen;
0ddcf42b 7808 u32 mask;
012a211a
FL		 7809
7810 if (!nfs_server_capable(inode, NFS_CAP_XATTR))
7811 return 0;
7812
0ddcf42b
N		 7813 if (!nfs_access_get_cached(inode, current_cred(), &mask, true)) {
7814 if (!(mask & NFS_ACCESS_XALIST))
012a211a
FL		 7815 return 0;
7816 }
7817
1f3208b2 7818 ret = nfs_revalidate_inode(inode, NFS_INO_INVALID_CHANGE);
95ad37f9
FL		 7819 if (ret)
7820 return ret;
7821
7822 ret = nfs4_xattr_cache_list(inode, list, list_len);
7823 if (ret >= 0 || (ret < 0 && ret != -ENOENT))
7824 return ret;
7825
012a211a
FL		 7826 cookie = 0;
7827 eof = false;
7828 buflen = list_len ? list_len : XATTR_LIST_MAX;
7829 buf = list_len ? list : NULL;
7830 size = 0;
7831
7832 while (!eof) {
7833 ret = nfs42_proc_listxattrs(inode, buf, buflen,
7834 &cookie, &eof);
7835 if (ret < 0)
7836 return ret;
7837
7838 if (list_len) {
7839 buf += ret;
7840 buflen -= ret;
7841 }
7842 size += ret;
7843 }
7844
95ad37f9
FL		 7845 if (list_len)
7846 nfs4_xattr_cache_set_list(inode, list, size);
7847
012a211a
FL		 7848 return size;
7849}
7850
7851#else
7852
7853static ssize_t
7854nfs4_listxattr_nfs4_user(struct inode *inode, char *list, size_t list_len)
7855{
7856 return 0;
7857}
7858#endif /* CONFIG_NFS_V4_2 */
7859
533eb461
AA		 7860/*
7861 * nfs_fhget will use either the mounted_on_fileid or the fileid
7862 */
69aaaae1
TM		 7863static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
7864{
533eb461
AA		 7865 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
7866 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
7867 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 7868 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 7869 return;
7870
7871 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 7872 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 7873 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
7874 fattr->nlink = 2;
7875}
7876
f05d147f
BS		 7877static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
7878 const struct qstr *name,
7879 struct nfs4_fs_locations *fs_locations,
7880 struct page *page)
683b57b4
TM		 7881{
7882 struct nfs_server *server = NFS_SERVER(dir);
c05cefcc 7883 u32 bitmask[3];
683b57b4
TM		 7884 struct nfs4_fs_locations_arg args = {
7885 .dir_fh = NFS_FH(dir),
c228fd3a 7886 .name = name,
683b57b4
TM		 7887 .page = page,
7888 .bitmask = bitmask,
7889 };
22958463
BH		 7890 struct nfs4_fs_locations_res res = {
7891 .fs_locations = fs_locations,
7892 };
683b57b4
TM		 7893 struct rpc_message msg = {
7894 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
7895 .rpc_argp = &args,
22958463 7896 .rpc_resp = &res,
683b57b4
TM		 7897 };
7898 int status;
7899
3110ff80 7900 dprintk("%s: start\n", __func__);
533eb461 7901
c05cefcc
CL		 7902 bitmask[0] = nfs4_fattr_bitmap[0] | FATTR4_WORD0_FS_LOCATIONS;
7903 bitmask[1] = nfs4_fattr_bitmap[1];
7904
533eb461
AA		 7905 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
7906 * is not supported */
7907 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
c05cefcc 7908 bitmask[0] &= ~FATTR4_WORD0_FILEID;
533eb461 7909 else
c05cefcc 7910 bitmask[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
533eb461 7911
c228fd3a 7912 nfs_fattr_init(&fs_locations->fattr);
683b57b4 7913 fs_locations->server = server;
830b8e33 7914 fs_locations->nlocations = 0;
f05d147f 7915 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 7916 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 7917 return status;
7918}
7919
f05d147f
BS		 7920int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
7921 const struct qstr *name,
7922 struct nfs4_fs_locations *fs_locations,
7923 struct page *page)
db0a9593 7924{
0688e64b
TM		 7925 struct nfs4_exception exception = {
7926 .interruptible = true,
7927 };
db0a9593
BS		 7928 int err;
7929 do {
078ea3df
TM		 7930 err = _nfs4_proc_fs_locations(client, dir, name,
7931 fs_locations, page);
7932 trace_nfs4_get_fs_locations(dir, name, err);
7933 err = nfs4_handle_exception(NFS_SERVER(dir), err,
db0a9593
BS		 7934 &exception);
7935 } while (exception.retry);
7936 return err;
7937}
7938
b03d735b
CL		 7939/*
7940 * This operation also signals the server that this client is
7941 * performing migration recovery. The server can stop returning
7942 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
7943 * appended to this compound to identify the client ID which is
7944 * performing recovery.
7945 */
bdab4fd5
OK		 7946static int _nfs40_proc_get_locations(struct nfs_server *server,
7947 struct nfs_fh *fhandle,
b03d735b 7948 struct nfs4_fs_locations *locations,
a52458b4 7949 struct page *page, const struct cred *cred)
b03d735b 7950{
b03d735b
CL		 7951 struct rpc_clnt *clnt = server->client;
7952 u32 bitmask[2] = {
7953 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
7954 };
7955 struct nfs4_fs_locations_arg args = {
7956 .clientid = server->nfs_client->cl_clientid,
bdab4fd5 7957 .fh = fhandle,
b03d735b
CL		 7958 .page = page,
7959 .bitmask = bitmask,
7960 .migration = 1, /* skip LOOKUP */
7961 .renew = 1, /* append RENEW */
7962 };
7963 struct nfs4_fs_locations_res res = {
7964 .fs_locations = locations,
7965 .migration = 1,
7966 .renew = 1,
7967 };
7968 struct rpc_message msg = {
7969 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
7970 .rpc_argp = &args,
7971 .rpc_resp = &res,
7972 .rpc_cred = cred,
7973 };
7974 unsigned long now = jiffies;
7975 int status;
7976
7977 nfs_fattr_init(&locations->fattr);
7978 locations->server = server;
7979 locations->nlocations = 0;
7980
fba83f34 7981 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1);
b03d735b
CL		 7982 status = nfs4_call_sync_sequence(clnt, server, &msg,
7983 &args.seq_args, &res.seq_res);
7984 if (status)
7985 return status;
7986
7987 renew_lease(server, now);
7988 return 0;
7989}
7990
7991#ifdef CONFIG_NFS_V4_1
7992
7993/*
7994 * This operation also signals the server that this client is
7995 * performing migration recovery. The server can stop asserting
7996 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
7997 * performing this operation is identified in the SEQUENCE
7998 * operation in this compound.
7999 *
8000 * When the client supports GETATTR(fs_locations_info), it can
8001 * be plumbed in here.
8002 */
bdab4fd5
OK		 8003static int _nfs41_proc_get_locations(struct nfs_server *server,
8004 struct nfs_fh *fhandle,
b03d735b 8005 struct nfs4_fs_locations *locations,
a52458b4 8006 struct page *page, const struct cred *cred)
b03d735b 8007{
b03d735b
CL		 8008 struct rpc_clnt *clnt = server->client;
8009 u32 bitmask[2] = {
8010 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
8011 };
8012 struct nfs4_fs_locations_arg args = {
bdab4fd5 8013 .fh = fhandle,
b03d735b
CL		 8014 .page = page,
8015 .bitmask = bitmask,
8016 .migration = 1, /* skip LOOKUP */
8017 };
8018 struct nfs4_fs_locations_res res = {
8019 .fs_locations = locations,
8020 .migration = 1,
8021 };
8022 struct rpc_message msg = {
8023 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
8024 .rpc_argp = &args,
8025 .rpc_resp = &res,
8026 .rpc_cred = cred,
8027 };
8028 int status;
8029
8030 nfs_fattr_init(&locations->fattr);
8031 locations->server = server;
8032 locations->nlocations = 0;
8033
fba83f34 8034 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1);
b03d735b
CL		 8035 status = nfs4_call_sync_sequence(clnt, server, &msg,
8036 &args.seq_args, &res.seq_res);
8037 if (status == NFS4_OK &&
8038 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
8039 status = -NFS4ERR_LEASE_MOVED;
8040 return status;
8041}
8042
8043#endif /* CONFIG_NFS_V4_1 */
8044
8045/**
8046 * nfs4_proc_get_locations - discover locations for a migrated FSID
8047 * @inode: inode on FSID that is migrating
8048 * @locations: result of query
8049 * @page: buffer
8050 * @cred: credential to use for this operation
8051 *
8052 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
8053 * operation failed, or a negative errno if a local error occurred.
8054 *
8055 * On success, "locations" is filled in, but if the server has
8056 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
8057 * asserted.
8058 *
8059 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
8060 * from this client that require migration recovery.
8061 */
bdab4fd5
OK		 8062int nfs4_proc_get_locations(struct nfs_server *server,
8063 struct nfs_fh *fhandle,
b03d735b 8064 struct nfs4_fs_locations *locations,
a52458b4 8065 struct page *page, const struct cred *cred)
b03d735b 8066{
b03d735b
CL		 8067 struct nfs_client *clp = server->nfs_client;
8068 const struct nfs4_mig_recovery_ops *ops =
8069 clp->cl_mvops->mig_recovery_ops;
0688e64b
TM		 8070 struct nfs4_exception exception = {
8071 .interruptible = true,
8072 };
b03d735b
CL		 8073 int status;
8074
8075 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
8076 (unsigned long long)server->fsid.major,
8077 (unsigned long long)server->fsid.minor,
8078 clp->cl_hostname);
bdab4fd5 8079 nfs_display_fhandle(fhandle, __func__);
b03d735b
CL		 8080
8081 do {
bdab4fd5
OK		 8082 status = ops->get_locations(server, fhandle, locations, page,
8083 cred);
b03d735b
CL		 8084 if (status != -NFS4ERR_DELAY)
8085 break;
8086 nfs4_handle_exception(server, status, &exception);
8087 } while (exception.retry);
8088 return status;
8089}
8090
44c99933
CL		 8091/*
8092 * This operation also signals the server that this client is
8093 * performing "lease moved" recovery. The server can stop
8094 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
8095 * is appended to this compound to identify the client ID which is
8096 * performing recovery.
8097 */
a52458b4 8098static int _nfs40_proc_fsid_present(struct inode *inode, const struct cred *cred)
44c99933
CL		 8099{
8100 struct nfs_server *server = NFS_SERVER(inode);
8101 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
8102 struct rpc_clnt *clnt = server->client;
8103 struct nfs4_fsid_present_arg args = {
8104 .fh = NFS_FH(inode),
8105 .clientid = clp->cl_clientid,
8106 .renew = 1, /* append RENEW */
8107 };
8108 struct nfs4_fsid_present_res res = {
8109 .renew = 1,
8110 };
8111 struct rpc_message msg = {
8112 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
8113 .rpc_argp = &args,
8114 .rpc_resp = &res,
8115 .rpc_cred = cred,
8116 };
8117 unsigned long now = jiffies;
8118 int status;
8119
8120 res.fh = nfs_alloc_fhandle();
8121 if (res.fh == NULL)
8122 return -ENOMEM;
8123
fba83f34 8124 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1);
44c99933
CL		 8125 status = nfs4_call_sync_sequence(clnt, server, &msg,
8126 &args.seq_args, &res.seq_res);
8127 nfs_free_fhandle(res.fh);
8128 if (status)
8129 return status;
8130
8131 do_renew_lease(clp, now);
8132 return 0;
8133}
8134
8135#ifdef CONFIG_NFS_V4_1
8136
8137/*
8138 * This operation also signals the server that this client is
8139 * performing "lease moved" recovery. The server can stop asserting
8140 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
8141 * this operation is identified in the SEQUENCE operation in this
8142 * compound.
8143 */
a52458b4 8144static int _nfs41_proc_fsid_present(struct inode *inode, const struct cred *cred)
44c99933
CL		 8145{
8146 struct nfs_server *server = NFS_SERVER(inode);
8147 struct rpc_clnt *clnt = server->client;
8148 struct nfs4_fsid_present_arg args = {
8149 .fh = NFS_FH(inode),
8150 };
8151 struct nfs4_fsid_present_res res = {
8152 };
8153 struct rpc_message msg = {
8154 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
8155 .rpc_argp = &args,
8156 .rpc_resp = &res,
8157 .rpc_cred = cred,
8158 };
8159 int status;
8160
8161 res.fh = nfs_alloc_fhandle();
8162 if (res.fh == NULL)
8163 return -ENOMEM;
8164
fba83f34 8165 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1);
44c99933
CL		 8166 status = nfs4_call_sync_sequence(clnt, server, &msg,
8167 &args.seq_args, &res.seq_res);
8168 nfs_free_fhandle(res.fh);
8169 if (status == NFS4_OK &&
8170 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
8171 status = -NFS4ERR_LEASE_MOVED;
8172 return status;
8173}
8174
8175#endif /* CONFIG_NFS_V4_1 */
8176
8177/**
8178 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
8179 * @inode: inode on FSID to check
8180 * @cred: credential to use for this operation
8181 *
8182 * Server indicates whether the FSID is present, moved, or not
8183 * recognized. This operation is necessary to clear a LEASE_MOVED
8184 * condition for this client ID.
8185 *
8186 * Returns NFS4_OK if the FSID is present on this server,
8187 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
8188 * NFS4ERR code if some error occurred on the server, or a
8189 * negative errno if a local failure occurred.
8190 */
a52458b4 8191int nfs4_proc_fsid_present(struct inode *inode, const struct cred *cred)
44c99933
CL		 8192{
8193 struct nfs_server *server = NFS_SERVER(inode);
8194 struct nfs_client *clp = server->nfs_client;
8195 const struct nfs4_mig_recovery_ops *ops =
8196 clp->cl_mvops->mig_recovery_ops;
0688e64b
TM		 8197 struct nfs4_exception exception = {
8198 .interruptible = true,
8199 };
44c99933
CL		 8200 int status;
8201
8202 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
8203 (unsigned long long)server->fsid.major,
8204 (unsigned long long)server->fsid.minor,
8205 clp->cl_hostname);
8206 nfs_display_fhandle(NFS_FH(inode), __func__);
8207
8208 do {
8209 status = ops->fsid_present(inode, cred);
8210 if (status != -NFS4ERR_DELAY)
8211 break;
8212 nfs4_handle_exception(server, status, &exception);
8213 } while (exception.retry);
8214 return status;
8215}
8216
302fad7b 8217/*
a5250def
WAA		 8218 * If 'use_integrity' is true and the state managment nfs_client
8219 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
8220 * and the machine credential as per RFC3530bis and RFC5661 Security
8221 * Considerations sections. Otherwise, just use the user cred with the
8222 * filesystem's rpc_client.
5ec16a85 8223 */
a5250def 8224static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
5a5ea0d4
BS		 8225{
8226 int status;
50493364
AS		 8227 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
8228 struct nfs_client *clp = NFS_SERVER(dir)->nfs_client;
5a5ea0d4
BS		 8229 struct nfs4_secinfo_arg args = {
8230 .dir_fh = NFS_FH(dir),
8231 .name = name,
8232 };
8233 struct nfs4_secinfo_res res = {
8234 .flavors = flavors,
8235 };
8236 struct rpc_message msg = {
8237 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
8238 .rpc_argp = &args,
8239 .rpc_resp = &res,
8240 };
50493364
AS		 8241 struct nfs4_call_sync_data data = {
8242 .seq_server = NFS_SERVER(dir),
8243 .seq_args = &args.seq_args,
8244 .seq_res = &res.seq_res,
8245 };
8246 struct rpc_task_setup task_setup = {
8247 .rpc_client = clnt,
8248 .rpc_message = &msg,
8249 .callback_ops = clp->cl_mvops->call_sync_ops,
8250 .callback_data = &data,
8251 .flags = RPC_TASK_NO_ROUND_ROBIN,
8252 };
a52458b4 8253 const struct cred *cred = NULL;
a5250def
WAA		 8254
8255 if (use_integrity) {
50493364
AS		 8256 clnt = clp->cl_rpcclient;
8257 task_setup.rpc_client = clnt;
8258
8259 cred = nfs4_get_clid_cred(clp);
7cb852df 8260 msg.rpc_cred = cred;
a5250def 8261 }
5a5ea0d4
BS		 8262
8263 dprintk("NFS call secinfo %s\n", name->name);
8b5bee2e 8264
50493364
AS		 8265 nfs4_state_protect(clp, NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
8266 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0);
8267 status = nfs4_call_sync_custom(&task_setup);
8b5bee2e 8268
5a5ea0d4 8269 dprintk("NFS reply secinfo: %d\n", status);
a5250def 8270
a52458b4 8271 put_cred(cred);
5a5ea0d4
BS		 8272 return status;
8273}
8274
72de53ec
BS		 8275int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
8276 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4 8277{
0688e64b
TM		 8278 struct nfs4_exception exception = {
8279 .interruptible = true,
8280 };
5a5ea0d4
BS		 8281 int err;
8282 do {
a5250def
WAA		 8283 err = -NFS4ERR_WRONGSEC;
8284
8285 /* try to use integrity protection with machine cred */
8286 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
8287 err = _nfs4_proc_secinfo(dir, name, flavors, true);
8288
8289 /*
8290 * if unable to use integrity protection, or SECINFO with
8291 * integrity protection returns NFS4ERR_WRONGSEC (which is
8292 * disallowed by spec, but exists in deployed servers) use
8293 * the current filesystem's rpc_client and the user cred.
8294 */
8295 if (err == -NFS4ERR_WRONGSEC)
8296 err = _nfs4_proc_secinfo(dir, name, flavors, false);
8297
078ea3df
TM		 8298 trace_nfs4_secinfo(dir, name, err);
8299 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5a5ea0d4
BS		 8300 &exception);
8301 } while (exception.retry);
8302 return err;
8303}
8304
557134a3 8305#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 8306/*
8307 * Check the exchange flags returned by the server for invalid flags, having
8308 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
8309 * DS flags set.
8310 */
8c39076c 8311static int nfs4_check_cl_exchange_flags(u32 flags, u32 version)
357f54d6 8312{
8c39076c
OK		 8313 if (version >= 2 && (flags & ~EXCHGID4_2_FLAG_MASK_R))
8314 goto out_inval;
8315 else if (version < 2 && (flags & ~EXCHGID4_FLAG_MASK_R))
357f54d6
AA		 8316 goto out_inval;
8317 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
8318 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
8319 goto out_inval;
8320 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
8321 goto out_inval;
8322 return NFS_OK;
8323out_inval:
8324 return -NFS4ERR_INVAL;
8325}
8326
78fe0f41 8327static bool
79d4e1f0
CL		 8328nfs41_same_server_scope(struct nfs41_server_scope *a,
8329 struct nfs41_server_scope *b)
78fe0f41 8330{
49ad0145
AS		 8331 if (a->server_scope_sz != b->server_scope_sz)
8332 return false;
8333 return memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0;
78fe0f41
WAA		 8334}
8335
02a95dee
AA		 8336static void
8337nfs4_bind_one_conn_to_session_done(struct rpc_task *task, void *calldata)
8338{
5c441544 8339 struct nfs41_bind_conn_to_session_args *args = task->tk_msg.rpc_argp;
dff58530 8340 struct nfs41_bind_conn_to_session_res *res = task->tk_msg.rpc_resp;
5c441544
TM		 8341 struct nfs_client *clp = args->client;
8342
8343 switch (task->tk_status) {
8344 case -NFS4ERR_BADSESSION:
8345 case -NFS4ERR_DEADSESSION:
8346 nfs4_schedule_session_recovery(clp->cl_session,
8347 task->tk_status);
495b9746 8348 return;
5c441544 8349 }
dff58530
OK		 8350 if (args->dir == NFS4_CDFC4_FORE_OR_BOTH &&
8351 res->dir != NFS4_CDFS4_BOTH) {
8352 rpc_task_close_connection(task);
8353 if (args->retries++ < MAX_BIND_CONN_TO_SESSION_RETRIES)
8354 rpc_restart_call(task);
8355 }
02a95dee
AA		 8356}
8357
8358static const struct rpc_call_ops nfs4_bind_one_conn_to_session_ops = {
1c709b76 8359 .rpc_call_done = nfs4_bind_one_conn_to_session_done,
02a95dee
AA		 8360};
8361
7c44f1ae 8362/*
d9ddbf5d 8363 * nfs4_proc_bind_one_conn_to_session()
7c44f1ae
WAA		 8364 *
8365 * The 4.1 client currently uses the same TCP connection for the
8366 * fore and backchannel.
8367 */
d9ddbf5d
TM		 8368static
8369int nfs4_proc_bind_one_conn_to_session(struct rpc_clnt *clnt,
8370 struct rpc_xprt *xprt,
8371 struct nfs_client *clp,
a52458b4 8372 const struct cred *cred)
7c44f1ae
WAA		 8373{
8374 int status;
71a097c6
TM		 8375 struct nfs41_bind_conn_to_session_args args = {
8376 .client = clp,
8377 .dir = NFS4_CDFC4_FORE_OR_BOTH,
dff58530 8378 .retries = 0,
71a097c6 8379 };
7c44f1ae
WAA		 8380 struct nfs41_bind_conn_to_session_res res;
8381 struct rpc_message msg = {
8382 .rpc_proc =
8383 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
71a097c6 8384 .rpc_argp = &args,
7c44f1ae 8385 .rpc_resp = &res,
2cf047c9 8386 .rpc_cred = cred,
7c44f1ae 8387 };
d9ddbf5d
TM		 8388 struct rpc_task_setup task_setup_data = {
8389 .rpc_client = clnt,
8390 .rpc_xprt = xprt,
02a95dee 8391 .callback_ops = &nfs4_bind_one_conn_to_session_ops,
d9ddbf5d
TM		 8392 .rpc_message = &msg,
8393 .flags = RPC_TASK_TIMEOUT,
8394 };
8395 struct rpc_task *task;
7c44f1ae 8396
71a097c6
TM		 8397 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id);
8398 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN))
8399 args.dir = NFS4_CDFC4_FORE;
7c44f1ae 8400
d9ddbf5d
TM		 8401 /* Do not set the backchannel flag unless this is clnt->cl_xprt */
8402 if (xprt != rcu_access_pointer(clnt->cl_xprt))
8403 args.dir = NFS4_CDFC4_FORE;
8404
8405 task = rpc_run_task(&task_setup_data);
8406 if (!IS_ERR(task)) {
8407 status = task->tk_status;
8408 rpc_put_task(task);
8409 } else
8410 status = PTR_ERR(task);
c6d01c6f 8411 trace_nfs4_bind_conn_to_session(clp, status);
7c44f1ae 8412 if (status == 0) {
71a097c6 8413 if (memcmp(res.sessionid.data,
7c44f1ae
WAA		 8414 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
8415 dprintk("NFS: %s: Session ID mismatch\n", __func__);
c7ae7639 8416 return -EIO;
7c44f1ae 8417 }
71a097c6 8418 if ((res.dir & args.dir) != res.dir || res.dir == 0) {
7c44f1ae
WAA		 8419 dprintk("NFS: %s: Unexpected direction from server\n",
8420 __func__);
c7ae7639 8421 return -EIO;
7c44f1ae 8422 }
71a097c6 8423 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) {
7c44f1ae
WAA		 8424 dprintk("NFS: %s: Server returned RDMA mode = true\n",
8425 __func__);
c7ae7639 8426 return -EIO;
7c44f1ae
WAA		 8427 }
8428 }
c7ae7639 8429
7c44f1ae
WAA		 8430 return status;
8431}
8432
d9ddbf5d
TM		 8433struct rpc_bind_conn_calldata {
8434 struct nfs_client *clp;
a52458b4 8435 const struct cred *cred;
d9ddbf5d
TM		 8436};
8437
8438static int
8439nfs4_proc_bind_conn_to_session_callback(struct rpc_clnt *clnt,
8440 struct rpc_xprt *xprt,
8441 void *calldata)
8442{
8443 struct rpc_bind_conn_calldata *p = calldata;
8444
8445 return nfs4_proc_bind_one_conn_to_session(clnt, xprt, p->clp, p->cred);
8446}
8447
a52458b4 8448int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, const struct cred *cred)
d9ddbf5d
TM		 8449{
8450 struct rpc_bind_conn_calldata data = {
8451 .clp = clp,
8452 .cred = cred,
8453 };
8454 return rpc_clnt_iterate_for_each_xprt(clp->cl_rpcclient,
8455 nfs4_proc_bind_conn_to_session_callback, &data);
8456}
8457
99fe60d0 8458/*
fa940720
WAA		 8459 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
8460 * and operations we'd like to see to enable certain features in the allow map
2031cd1a
WAA		 8461 */
8462static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
8463 .how = SP4_MACH_CRED,
8464 .enforce.u.words = {
8465 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
8466 1 << (OP_EXCHANGE_ID - 32) |
8467 1 << (OP_CREATE_SESSION - 32) |
8468 1 << (OP_DESTROY_SESSION - 32) |
8469 1 << (OP_DESTROY_CLIENTID - 32)
fa940720
WAA		 8470 },
8471 .allow.u.words = {
8472 [0] = 1 << (OP_CLOSE) |
99ade3c7 8473 1 << (OP_OPEN_DOWNGRADE) |
a0279625 8474 1 << (OP_LOCKU) |
99ade3c7 8475 1 << (OP_DELEGRETURN) |
a0279625 8476 1 << (OP_COMMIT),
8b5bee2e 8477 [1] = 1 << (OP_SECINFO - 32) |
3787d506 8478 1 << (OP_SECINFO_NO_NAME - 32) |
99ade3c7 8479 1 << (OP_LAYOUTRETURN - 32) |
3787d506 8480 1 << (OP_TEST_STATEID - 32) |
a0279625
WAA		 8481 1 << (OP_FREE_STATEID - 32) |
8482 1 << (OP_WRITE - 32)
2031cd1a
WAA		 8483 }
8484};
8485
8486/*
8487 * Select the state protection mode for client `clp' given the server results
8488 * from exchange_id in `sp'.
99fe60d0 8489 *
2031cd1a
WAA		 8490 * Returns 0 on success, negative errno otherwise.
8491 */
8492static int nfs4_sp4_select_mode(struct nfs_client *clp,
8493 struct nfs41_state_protection *sp)
8494{
8495 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
8496 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
8497 1 << (OP_EXCHANGE_ID - 32) |
8498 1 << (OP_CREATE_SESSION - 32) |
8499 1 << (OP_DESTROY_SESSION - 32) |
8500 1 << (OP_DESTROY_CLIENTID - 32)
8501 };
937e3133 8502 unsigned long flags = 0;
2031cd1a 8503 unsigned int i;
937e3133 8504 int ret = 0;
2031cd1a
WAA		 8505
8506 if (sp->how == SP4_MACH_CRED) {
8507 /* Print state protect result */
8508 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
8509 for (i = 0; i <= LAST_NFS4_OP; i++) {
8510 if (test_bit(i, sp->enforce.u.longs))
8511 dfprintk(MOUNT, " enforce op %d\n", i);
8512 if (test_bit(i, sp->allow.u.longs))
8513 dfprintk(MOUNT, " allow op %d\n", i);
8514 }
8515
8516 /* make sure nothing is on enforce list that isn't supported */
8517 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
8518 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
8519 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
937e3133
TM		 8520 ret = -EINVAL;
8521 goto out;
2031cd1a
WAA		 8522 }
8523 }
8524
8525 /*
8526 * Minimal mode - state operations are allowed to use machine
8527 * credential. Note this already happens by default, so the
8528 * client doesn't have to do anything more than the negotiation.
8529 *
8530 * NOTE: we don't care if EXCHANGE_ID is in the list -
8531 * we're already using the machine cred for exchange_id
8532 * and will never use a different cred.
8533 */
8534 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
8535 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
8536 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
8537 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
8538 dfprintk(MOUNT, "sp4_mach_cred:\n");
8539 dfprintk(MOUNT, " minimal mode enabled\n");
937e3133 8540 __set_bit(NFS_SP4_MACH_CRED_MINIMAL, &flags);
2031cd1a
WAA		 8541 } else {
8542 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
937e3133
TM		 8543 ret = -EINVAL;
8544 goto out;
2031cd1a 8545 }
fa940720
WAA		 8546
8547 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
99ade3c7
AE		 8548 test_bit(OP_OPEN_DOWNGRADE, sp->allow.u.longs) &&
8549 test_bit(OP_DELEGRETURN, sp->allow.u.longs) &&
fa940720
WAA		 8550 test_bit(OP_LOCKU, sp->allow.u.longs)) {
8551 dfprintk(MOUNT, " cleanup mode enabled\n");
937e3133 8552 __set_bit(NFS_SP4_MACH_CRED_CLEANUP, &flags);
fa940720 8553 }
8b5bee2e 8554
99ade3c7
AE		 8555 if (test_bit(OP_LAYOUTRETURN, sp->allow.u.longs)) {
8556 dfprintk(MOUNT, " pnfs cleanup mode enabled\n");
937e3133 8557 __set_bit(NFS_SP4_MACH_CRED_PNFS_CLEANUP, &flags);
99ade3c7
AE		 8558 }
8559
8b5bee2e
WAA		 8560 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
8561 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
8562 dfprintk(MOUNT, " secinfo mode enabled\n");
937e3133 8563 __set_bit(NFS_SP4_MACH_CRED_SECINFO, &flags);
8b5bee2e 8564 }
3787d506
WAA		 8565
8566 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
8567 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
8568 dfprintk(MOUNT, " stateid mode enabled\n");
937e3133 8569 __set_bit(NFS_SP4_MACH_CRED_STATEID, &flags);
3787d506 8570 }
8c21c62c
WAA		 8571
8572 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
8573 dfprintk(MOUNT, " write mode enabled\n");
937e3133 8574 __set_bit(NFS_SP4_MACH_CRED_WRITE, &flags);
8c21c62c
WAA		 8575 }
8576
8577 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
8578 dfprintk(MOUNT, " commit mode enabled\n");
937e3133 8579 __set_bit(NFS_SP4_MACH_CRED_COMMIT, &flags);
8c21c62c 8580 }
2031cd1a 8581 }
937e3133
TM		 8582out:
8583 clp->cl_sp4_flags = flags;
72bf75cf 8584 return ret;
2031cd1a
WAA		 8585}
8586
8d89bd70
AA		 8587struct nfs41_exchange_id_data {
8588 struct nfs41_exchange_id_res res;
8589 struct nfs41_exchange_id_args args;
8d89bd70
AA		 8590};
8591
8d89bd70
AA		 8592static void nfs4_exchange_id_release(void *data)
8593{
8594 struct nfs41_exchange_id_data *cdata =
8595 (struct nfs41_exchange_id_data *)data;
8596
63513232 8597 nfs_put_client(cdata->args.client);
8d89bd70
AA		 8598 kfree(cdata->res.impl_id);
8599 kfree(cdata->res.server_scope);
8600 kfree(cdata->res.server_owner);
8601 kfree(cdata);
8602}
8603
8604static const struct rpc_call_ops nfs4_exchange_id_call_ops = {
8d89bd70
AA		 8605 .rpc_release = nfs4_exchange_id_release,
8606};
8607
2031cd1a
WAA		 8608/*
8609 * _nfs4_proc_exchange_id()
6bbb4ae8 8610 *
2031cd1a 8611 * Wrapper for EXCHANGE_ID operation.
99fe60d0 8612 */
9c760d1f 8613static struct rpc_task *
a52458b4 8614nfs4_run_exchange_id(struct nfs_client *clp, const struct cred *cred,
ad0849a7 8615 u32 sp4_how, struct rpc_xprt *xprt)
99fe60d0 8616{
99fe60d0
BH		 8617 struct rpc_message msg = {
8618 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
99fe60d0
BH		 8619 .rpc_cred = cred,
8620 };
8d89bd70
AA		 8621 struct rpc_task_setup task_setup_data = {
8622 .rpc_client = clp->cl_rpcclient,
8623 .callback_ops = &nfs4_exchange_id_call_ops,
8624 .rpc_message = &msg,
5a0c257f 8625 .flags = RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN,
8d89bd70
AA		 8626 };
8627 struct nfs41_exchange_id_data *calldata;
e917f0d1 8628 int status;
8d89bd70 8629
212bf41d 8630 if (!refcount_inc_not_zero(&clp->cl_count))
9c760d1f 8631 return ERR_PTR(-EIO);
8d89bd70 8632
9c760d1f 8633 status = -ENOMEM;
8d89bd70 8634 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
9c760d1f
TM		 8635 if (!calldata)
8636 goto out;
99fe60d0 8637
fd40559c 8638 nfs4_init_boot_verifier(clp, &calldata->args.verifier);
873e3851
JL		 8639
8640 status = nfs4_init_uniform_client_string(clp);
8641 if (status)
8d89bd70 8642 goto out_calldata;
3a6bb738 8643
8d89bd70
AA		 8644 calldata->res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
8645 GFP_NOFS);
8646 status = -ENOMEM;
8647 if (unlikely(calldata->res.server_owner == NULL))
8648 goto out_calldata;
78fe0f41 8649
8d89bd70 8650 calldata->res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 8651 GFP_NOFS);
8d89bd70 8652 if (unlikely(calldata->res.server_scope == NULL))
acdeb69d 8653 goto out_server_owner;
78fe0f41 8654
8d89bd70
AA		 8655 calldata->res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
8656 if (unlikely(calldata->res.impl_id == NULL))
7d2ed9ac 8657 goto out_server_scope;
7d2ed9ac 8658
2031cd1a
WAA		 8659 switch (sp4_how) {
8660 case SP4_NONE:
8d89bd70 8661 calldata->args.state_protect.how = SP4_NONE;
2031cd1a
WAA		 8662 break;
8663
8664 case SP4_MACH_CRED:
8d89bd70 8665 calldata->args.state_protect = nfs4_sp4_mach_cred_request;
2031cd1a
WAA		 8666 break;
8667
8668 default:
8669 /* unsupported! */
8670 WARN_ON_ONCE(1);
8671 status = -EINVAL;
6b55970b 8672 goto out_impl_id;
2031cd1a 8673 }
ad0849a7 8674 if (xprt) {
ad0849a7 8675 task_setup_data.rpc_xprt = xprt;
d9cb7330 8676 task_setup_data.flags |= RPC_TASK_SOFTCONN;
fd40559c
TM		 8677 memcpy(calldata->args.verifier.data, clp->cl_confirm.data,
8678 sizeof(calldata->args.verifier.data));
ad0849a7 8679 }
8d89bd70 8680 calldata->args.client = clp;
8d89bd70 8681 calldata->args.flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
bfab2817
TM		 8682 EXCHGID4_FLAG_BIND_PRINC_STATEID;
8683#ifdef CONFIG_NFS_V4_1_MIGRATION
8684 calldata->args.flags |= EXCHGID4_FLAG_SUPP_MOVED_MIGR;
8d89bd70
AA		 8685#endif
8686 msg.rpc_argp = &calldata->args;
8687 msg.rpc_resp = &calldata->res;
8688 task_setup_data.callback_data = calldata;
2031cd1a 8689
9c760d1f 8690 return rpc_run_task(&task_setup_data);
8d89bd70
AA		 8691
8692out_impl_id:
8693 kfree(calldata->res.impl_id);
8694out_server_scope:
8695 kfree(calldata->res.server_scope);
8696out_server_owner:
8697 kfree(calldata->res.server_owner);
8698out_calldata:
8699 kfree(calldata);
9c760d1f 8700out:
63513232 8701 nfs_put_client(clp);
9c760d1f
TM		 8702 return ERR_PTR(status);
8703}
8704
8705/*
8706 * _nfs4_proc_exchange_id()
8707 *
8708 * Wrapper for EXCHANGE_ID operation.
8709 */
a52458b4 8710static int _nfs4_proc_exchange_id(struct nfs_client *clp, const struct cred *cred,
9c760d1f
TM		 8711 u32 sp4_how)
8712{
8713 struct rpc_task *task;
8714 struct nfs41_exchange_id_args *argp;
8715 struct nfs41_exchange_id_res *resp;
7dc2993a 8716 unsigned long now = jiffies;
9c760d1f
TM		 8717 int status;
8718
8719 task = nfs4_run_exchange_id(clp, cred, sp4_how, NULL);
8720 if (IS_ERR(task))
8721 return PTR_ERR(task);
8722
8723 argp = task->tk_msg.rpc_argp;
8724 resp = task->tk_msg.rpc_resp;
8725 status = task->tk_status;
8726 if (status != 0)
8727 goto out;
8728
8c39076c
OK		 8729 status = nfs4_check_cl_exchange_flags(resp->flags,
8730 clp->cl_mvops->minor_version);
9c760d1f
TM		 8731 if (status != 0)
8732 goto out;
8733
8734 status = nfs4_sp4_select_mode(clp, &resp->state_protect);
8735 if (status != 0)
8736 goto out;
8737
7dc2993a
RM		 8738 do_renew_lease(clp, now);
8739
9c760d1f
TM		 8740 clp->cl_clientid = resp->clientid;
8741 clp->cl_exchange_flags = resp->flags;
8742 clp->cl_seqid = resp->seqid;
8743 /* Client ID is not confirmed */
8744 if (!(resp->flags & EXCHGID4_FLAG_CONFIRMED_R))
8745 clear_bit(NFS4_SESSION_ESTABLISHED,
8746 &clp->cl_session->session_state);
8747
8748 if (clp->cl_serverscope != NULL &&
8749 !nfs41_same_server_scope(clp->cl_serverscope,
8750 resp->server_scope)) {
8751 dprintk("%s: server_scope mismatch detected\n",
8752 __func__);
8753 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
8754 }
8755
8756 swap(clp->cl_serverowner, resp->server_owner);
8757 swap(clp->cl_serverscope, resp->server_scope);
8758 swap(clp->cl_implid, resp->impl_id);
8759
8760 /* Save the EXCHANGE_ID verifier session trunk tests */
8761 memcpy(clp->cl_confirm.data, argp->verifier.data,
8762 sizeof(clp->cl_confirm.data));
8763out:
8764 trace_nfs4_exchange_id(clp, status);
8765 rpc_put_task(task);
8766 return status;
99fe60d0
BH		 8767}
8768
2031cd1a
WAA		 8769/*
8770 * nfs4_proc_exchange_id()
8771 *
8772 * Returns zero, a negative errno, or a negative NFS4ERR status code.
8773 *
8774 * Since the clientid has expired, all compounds using sessions
8775 * associated with the stale clientid will be returning
8776 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
8777 * be in some phase of session reset.
8778 *
8779 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
8780 */
a52458b4 8781int nfs4_proc_exchange_id(struct nfs_client *clp, const struct cred *cred)
2031cd1a
WAA		 8782{
8783 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
8784 int status;
8785
8786 /* try SP4_MACH_CRED if krb5i/p */
8787 if (authflavor == RPC_AUTH_GSS_KRB5I ||
8788 authflavor == RPC_AUTH_GSS_KRB5P) {
9c760d1f 8789 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
2031cd1a
WAA		 8790 if (!status)
8791 return 0;
8792 }
8793
8794 /* try SP4_NONE */
9c760d1f 8795 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
2031cd1a
WAA		 8796}
8797
04fa2c6b
AA		 8798/**
8799 * nfs4_test_session_trunk
8800 *
8801 * This is an add_xprt_test() test function called from
8802 * rpc_clnt_setup_test_and_add_xprt.
8803 *
8804 * The rpc_xprt_switch is referrenced by rpc_clnt_setup_test_and_add_xprt
8805 * and is dereferrenced in nfs4_exchange_id_release
8806 *
8807 * Upon success, add the new transport to the rpc_clnt
8808 *
8809 * @clnt: struct rpc_clnt to get new transport
8810 * @xprt: the rpc_xprt to test
8811 * @data: call data for _nfs4_proc_exchange_id.
8812 */
10e037d1 8813void nfs4_test_session_trunk(struct rpc_clnt *clnt, struct rpc_xprt *xprt,
04fa2c6b
AA		 8814 void *data)
8815{
8816 struct nfs4_add_xprt_data *adata = (struct nfs4_add_xprt_data *)data;
9c760d1f
TM		 8817 struct rpc_task *task;
8818 int status;
8819
04fa2c6b
AA		 8820 u32 sp4_how;
8821
8822 dprintk("--> %s try %s\n", __func__,
8823 xprt->address_strings[RPC_DISPLAY_ADDR]);
8824
8825 sp4_how = (adata->clp->cl_sp4_flags == 0 ? SP4_NONE : SP4_MACH_CRED);
8826
8827 /* Test connection for session trunking. Async exchange_id call */
9c760d1f
TM		 8828 task = nfs4_run_exchange_id(adata->clp, adata->cred, sp4_how, xprt);
8829 if (IS_ERR(task))
10e037d1 8830 return;
9c760d1f
TM		 8831
8832 status = task->tk_status;
8833 if (status == 0)
8834 status = nfs4_detect_session_trunking(adata->clp,
8835 task->tk_msg.rpc_resp, xprt);
8836
10e037d1
S		 8837 if (status == 0)
8838 rpc_clnt_xprt_switch_add_xprt(clnt, xprt);
8839
9c760d1f 8840 rpc_put_task(task);
2031cd1a 8841}
04fa2c6b 8842EXPORT_SYMBOL_GPL(nfs4_test_session_trunk);
2031cd1a 8843
66245539 8844static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
a52458b4 8845 const struct cred *cred)
66245539
TM		 8846{
8847 struct rpc_message msg = {
8848 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
8849 .rpc_argp = clp,
8850 .rpc_cred = cred,
8851 };
8852 int status;
8853
5a0c257f
N		 8854 status = rpc_call_sync(clp->cl_rpcclient, &msg,
8855 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN);
c6d01c6f 8856 trace_nfs4_destroy_clientid(clp, status);
66245539 8857 if (status)
02c67525 8858 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 8859 "DESTROY_CLIENTID.", status, clp->cl_hostname);
8860 return status;
8861}
8862
8863static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
a52458b4 8864 const struct cred *cred)
66245539
TM		 8865{
8866 unsigned int loop;
8867 int ret;
8868
8869 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
8870 ret = _nfs4_proc_destroy_clientid(clp, cred);
8871 switch (ret) {
8872 case -NFS4ERR_DELAY:
8873 case -NFS4ERR_CLIENTID_BUSY:
8874 ssleep(1);
8875 break;
8876 default:
8877 return ret;
8878 }
8879 }
8880 return 0;
8881}
8882
8883int nfs4_destroy_clientid(struct nfs_client *clp)
8884{
a52458b4 8885 const struct cred *cred;
66245539
TM		 8886 int ret = 0;
8887
8888 if (clp->cl_mvops->minor_version < 1)
8889 goto out;
8890 if (clp->cl_exchange_flags == 0)
8891 goto out;
05f4c350
CL		 8892 if (clp->cl_preserve_clid)
8893 goto out;
73d8bde5 8894 cred = nfs4_get_clid_cred(clp);
66245539 8895 ret = nfs4_proc_destroy_clientid(clp, cred);
a52458b4 8896 put_cred(cred);
66245539
TM		 8897 switch (ret) {
8898 case 0:
8899 case -NFS4ERR_STALE_CLIENTID:
8900 clp->cl_exchange_flags = 0;
8901 }
8902out:
8903 return ret;
8904}
8905
0efb01b2
DB		 8906#endif /* CONFIG_NFS_V4_1 */
8907
2050f0cc
AA		 8908struct nfs4_get_lease_time_data {
8909 struct nfs4_get_lease_time_args *args;
8910 struct nfs4_get_lease_time_res *res;
8911 struct nfs_client *clp;
8912};
8913
8914static void nfs4_get_lease_time_prepare(struct rpc_task *task,
8915 void *calldata)
8916{
2050f0cc
AA		 8917 struct nfs4_get_lease_time_data *data =
8918 (struct nfs4_get_lease_time_data *)calldata;
8919
8920 dprintk("--> %s\n", __func__);
8921 /* just setup sequence, do not trigger session recovery
8922 since we're invoked within one */
7981c8a6 8923 nfs4_setup_sequence(data->clp,
d9afbd1b
TM		 8924 &data->args->la_seq_args,
8925 &data->res->lr_seq_res,
8926 task);
2050f0cc
AA		 8927 dprintk("<-- %s\n", __func__);
8928}
8929
8930/*
8931 * Called from nfs4_state_manager thread for session setup, so don't recover
8932 * from sequence operation or clientid errors.
8933 */
8934static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
8935{
8936 struct nfs4_get_lease_time_data *data =
8937 (struct nfs4_get_lease_time_data *)calldata;
8938
8939 dprintk("--> %s\n", __func__);
0efb01b2 8940 if (!nfs4_sequence_done(task, &data->res->lr_seq_res))
14516c3a 8941 return;
2050f0cc
AA		 8942 switch (task->tk_status) {
8943 case -NFS4ERR_DELAY:
8944 case -NFS4ERR_GRACE:
8945 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
8946 rpc_delay(task, NFS4_POLL_RETRY_MIN);
8947 task->tk_status = 0;
df561f66 8948 fallthrough;
a8a4ae3a 8949 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 8950 rpc_restart_call_prepare(task);
2050f0cc
AA		 8951 return;
8952 }
2050f0cc
AA		 8953 dprintk("<-- %s\n", __func__);
8954}
8955
17280175 8956static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 8957 .rpc_call_prepare = nfs4_get_lease_time_prepare,
8958 .rpc_call_done = nfs4_get_lease_time_done,
8959};
8960
8961int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
8962{
2050f0cc
AA		 8963 struct nfs4_get_lease_time_args args;
8964 struct nfs4_get_lease_time_res res = {
8965 .lr_fsinfo = fsinfo,
8966 };
8967 struct nfs4_get_lease_time_data data = {
8968 .args = &args,
8969 .res = &res,
8970 .clp = clp,
8971 };
8972 struct rpc_message msg = {
8973 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
8974 .rpc_argp = &args,
8975 .rpc_resp = &res,
8976 };
8977 struct rpc_task_setup task_setup = {
8978 .rpc_client = clp->cl_rpcclient,
8979 .rpc_message = &msg,
8980 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 8981 .callback_data = &data,
8982 .flags = RPC_TASK_TIMEOUT,
2050f0cc 8983 };
2050f0cc 8984
fba83f34 8985 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0, 1);
f836b27e 8986 return nfs4_call_sync_custom(&task_setup);
2050f0cc
AA		 8987}
8988
0efb01b2
DB		 8989#ifdef CONFIG_NFS_V4_1
8990
fc931582
AA		 8991/*
8992 * Initialize the values to be used by the client in CREATE_SESSION
8993 * If nfs4_init_session set the fore channel request and response sizes,
8994 * use them.
8995 *
8996 * Set the back channel max_resp_sz_cached to zero to force the client to
8997 * always set csa_cachethis to FALSE because the current implementation
8998 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
8999 */
6b26cc8c
CL		 9000static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args,
9001 struct rpc_clnt *clnt)
fc931582 9002{
18aad3d5 9003 unsigned int max_rqst_sz, max_resp_sz;
6b26cc8c 9004 unsigned int max_bc_payload = rpc_max_bc_payload(clnt);
7402a4fe 9005 unsigned int max_bc_slots = rpc_num_bc_slots(clnt);
18aad3d5
AA		 9006
9007 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
9008 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 9009
fc931582 9010 /* Fore channel attributes */
18aad3d5
AA		 9011 args->fc_attrs.max_rqst_sz = max_rqst_sz;
9012 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 9013 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 9014 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 9015
9016 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 9017 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 9018 __func__,
9019 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 9020 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 9021
9022 /* Back channel attributes */
6b26cc8c
CL		 9023 args->bc_attrs.max_rqst_sz = max_bc_payload;
9024 args->bc_attrs.max_resp_sz = max_bc_payload;
fc931582
AA		 9025 args->bc_attrs.max_resp_sz_cached = 0;
9026 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
62421cd9 9027 args->bc_attrs.max_reqs = max_t(unsigned short, max_session_cb_slots, 1);
7402a4fe
TM		 9028 if (args->bc_attrs.max_reqs > max_bc_slots)
9029 args->bc_attrs.max_reqs = max_bc_slots;
fc931582
AA		 9030
9031 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
9032 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
9033 __func__,
9034 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
9035 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
9036 args->bc_attrs.max_reqs);
9037}
9038
79969dd1
TM		 9039static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args,
9040 struct nfs41_create_session_res *res)
8d35301d 9041{
43c2e885 9042 struct nfs4_channel_attrs *sent = &args->fc_attrs;
79969dd1 9043 struct nfs4_channel_attrs *rcvd = &res->fc_attrs;
43c2e885 9044
43c2e885
BF		 9045 if (rcvd->max_resp_sz > sent->max_resp_sz)
9046 return -EINVAL;
9047 /*
9048 * Our requested max_ops is the minimum we need; we're not
9049 * prepared to break up compounds into smaller pieces than that.
9050 * So, no point even trying to continue if the server won't
9051 * cooperate:
9052 */
9053 if (rcvd->max_ops < sent->max_ops)
9054 return -EINVAL;
9055 if (rcvd->max_reqs == 0)
9056 return -EINVAL;
b4b9a0c1
VG		 9057 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
9058 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 9059 return 0;
8d35301d
AA		 9060}
9061
79969dd1
TM		 9062static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args,
9063 struct nfs41_create_session_res *res)
43c2e885
BF		 9064{
9065 struct nfs4_channel_attrs *sent = &args->bc_attrs;
79969dd1 9066 struct nfs4_channel_attrs *rcvd = &res->bc_attrs;
8d35301d 9067
b1c0df5f
TM		 9068 if (!(res->flags & SESSION4_BACK_CHAN))
9069 goto out;
43c2e885
BF		 9070 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
9071 return -EINVAL;
9072 if (rcvd->max_resp_sz < sent->max_resp_sz)
9073 return -EINVAL;
9074 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
9075 return -EINVAL;
5405fc44 9076 if (rcvd->max_ops > sent->max_ops)
43c2e885 9077 return -EINVAL;
5405fc44 9078 if (rcvd->max_reqs > sent->max_reqs)
43c2e885 9079 return -EINVAL;
b1c0df5f 9080out:
43c2e885
BF		 9081 return 0;
9082}
8d35301d 9083
8d35301d 9084static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
79969dd1 9085 struct nfs41_create_session_res *res)
8d35301d 9086{
43c2e885 9087 int ret;
8d35301d 9088
79969dd1 9089 ret = nfs4_verify_fore_channel_attrs(args, res);
43c2e885
BF		 9090 if (ret)
9091 return ret;
79969dd1
TM		 9092 return nfs4_verify_back_channel_attrs(args, res);
9093}
9094
9095static void nfs4_update_session(struct nfs4_session *session,
9096 struct nfs41_create_session_res *res)
9097{
9098 nfs4_copy_sessionid(&session->sess_id, &res->sessionid);
e11259f9
TM		 9099 /* Mark client id and session as being confirmed */
9100 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;
9101 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state);
79969dd1
TM		 9102 session->flags = res->flags;
9103 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs));
b1c0df5f
TM		 9104 if (res->flags & SESSION4_BACK_CHAN)
9105 memcpy(&session->bc_attrs, &res->bc_attrs,
9106 sizeof(session->bc_attrs));
8d35301d
AA		 9107}
9108
848f5bda 9109static int _nfs4_proc_create_session(struct nfs_client *clp,
a52458b4 9110 const struct cred *cred)
fc931582
AA		 9111{
9112 struct nfs4_session *session = clp->cl_session;
9113 struct nfs41_create_session_args args = {
9114 .client = clp,
79969dd1
TM		 9115 .clientid = clp->cl_clientid,
9116 .seqid = clp->cl_seqid,
fc931582
AA		 9117 .cb_program = NFS4_CALLBACK,
9118 };
79969dd1
TM		 9119 struct nfs41_create_session_res res;
9120
fc931582
AA		 9121 struct rpc_message msg = {
9122 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
9123 .rpc_argp = &args,
9124 .rpc_resp = &res,
848f5bda 9125 .rpc_cred = cred,
fc931582
AA		 9126 };
9127 int status;
9128
6b26cc8c 9129 nfs4_init_channel_attrs(&args, clp->cl_rpcclient);
0f91421e 9130 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 9131
5a0c257f
N		 9132 status = rpc_call_sync(session->clp->cl_rpcclient, &msg,
9133 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN);
c6d01c6f 9134 trace_nfs4_create_session(clp, status);
fc931582 9135
b519d408
TM		 9136 switch (status) {
9137 case -NFS4ERR_STALE_CLIENTID:
9138 case -NFS4ERR_DELAY:
9139 case -ETIMEDOUT:
9140 case -EACCES:
9141 case -EAGAIN:
9142 goto out;
8b98a532 9143 }
b519d408
TM		 9144
9145 clp->cl_seqid++;
43095d39 9146 if (!status) {
8d35301d 9147 /* Verify the session's negotiated channel_attrs values */
79969dd1 9148 status = nfs4_verify_channel_attrs(&args, &res);
fc931582 9149 /* Increment the clientid slot sequence id */
79969dd1
TM		 9150 if (status)
9151 goto out;
9152 nfs4_update_session(session, &res);
fc931582 9153 }
79969dd1 9154out:
fc931582
AA		 9155 return status;
9156}
9157
9158/*
9159 * Issues a CREATE_SESSION operation to the server.
9160 * It is the responsibility of the caller to verify the session is
9161 * expired before calling this routine.
9162 */
a52458b4 9163int nfs4_proc_create_session(struct nfs_client *clp, const struct cred *cred)
fc931582
AA		 9164{
9165 int status;
9166 unsigned *ptr;
fc931582
AA		 9167 struct nfs4_session *session = clp->cl_session;
9168
9169 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
9170
848f5bda 9171 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 9172 if (status)
9173 goto out;
9174
aacd5537
AA		 9175 /* Init or reset the session slot tables */
9176 status = nfs4_setup_session_slot_tables(session);
9177 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 9178 if (status)
9179 goto out;
9180
9181 ptr = (unsigned *)&session->sess_id.data[0];
9182 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
9183 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 9184out:
9185 dprintk("<-- %s\n", __func__);
9186 return status;
9187}
9188
0f3e66c6
AA		 9189/*
9190 * Issue the over-the-wire RPC DESTROY_SESSION.
9191 * The caller must serialize access to this routine.
9192 */
848f5bda 9193int nfs4_proc_destroy_session(struct nfs4_session *session,
a52458b4 9194 const struct cred *cred)
0f3e66c6 9195{
848f5bda
TM		 9196 struct rpc_message msg = {
9197 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
9198 .rpc_argp = session,
9199 .rpc_cred = cred,
9200 };
0f3e66c6 9201 int status = 0;
0f3e66c6
AA		 9202
9203 dprintk("--> nfs4_proc_destroy_session\n");
9204
9205 /* session is still being setup */
e11259f9
TM		 9206 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state))
9207 return 0;
0f3e66c6 9208
5a0c257f
N		 9209 status = rpc_call_sync(session->clp->cl_rpcclient, &msg,
9210 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN);
c6d01c6f 9211 trace_nfs4_destroy_session(session->clp, status);
0f3e66c6
AA		 9212
9213 if (status)
08106ac7 9214 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 9215 "Session has been destroyed regardless...\n", status);
9216
9217 dprintk("<-- nfs4_proc_destroy_session\n");
9218 return status;
9219}
9220
fc01cea9
AA		 9221/*
9222 * Renew the cl_session lease.
9223 */
d5f8d3fe
TM		 9224struct nfs4_sequence_data {
9225 struct nfs_client *clp;
9226 struct nfs4_sequence_args args;
9227 struct nfs4_sequence_res res;
9228};
9229
dc96aef9
AB		 9230static void nfs41_sequence_release(void *data)
9231{
d5f8d3fe
TM		 9232 struct nfs4_sequence_data *calldata = data;
9233 struct nfs_client *clp = calldata->clp;
dc96aef9 9234
212bf41d 9235 if (refcount_read(&clp->cl_count) > 1)
7135840f
AB		 9236 nfs4_schedule_state_renewal(clp);
9237 nfs_put_client(clp);
d5f8d3fe 9238 kfree(calldata);
dc96aef9
AB		 9239}
9240
aa5190d0
TM		 9241static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
9242{
9243 switch(task->tk_status) {
9244 case -NFS4ERR_DELAY:
aa5190d0
TM		 9245 rpc_delay(task, NFS4_POLL_RETRY_MAX);
9246 return -EAGAIN;
9247 default:
0400a6b0 9248 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 9249 }
9250 return 0;
9251}
9252
dc96aef9 9253static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 9254{
d5f8d3fe
TM		 9255 struct nfs4_sequence_data *calldata = data;
9256 struct nfs_client *clp = calldata->clp;
fc01cea9 9257
14516c3a
TM		 9258 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
9259 return;
fc01cea9 9260
c6d01c6f 9261 trace_nfs4_sequence(clp, task->tk_status);
fc01cea9
AA		 9262 if (task->tk_status < 0) {
9263 dprintk("%s ERROR %d\n", __func__, task->tk_status);
212bf41d 9264 if (refcount_read(&clp->cl_count) == 1)
7135840f 9265 goto out;
fc01cea9 9266
aa5190d0
TM		 9267 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
9268 rpc_restart_call_prepare(task);
fc01cea9
AA		 9269 return;
9270 }
9271 }
fc01cea9 9272 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 9273out:
fc01cea9
AA		 9274 dprintk("<-- %s\n", __func__);
9275}
9276
9277static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
9278{
d5f8d3fe
TM		 9279 struct nfs4_sequence_data *calldata = data;
9280 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 9281 struct nfs4_sequence_args *args;
9282 struct nfs4_sequence_res *res;
9283
fc01cea9
AA		 9284 args = task->tk_msg.rpc_argp;
9285 res = task->tk_msg.rpc_resp;
9286
7981c8a6 9287 nfs4_setup_sequence(clp, args, res, task);
fc01cea9
AA		 9288}
9289
9290static const struct rpc_call_ops nfs41_sequence_ops = {
9291 .rpc_call_done = nfs41_sequence_call_done,
9292 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 9293 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 9294};
9295
8fe72bac 9296static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
a52458b4 9297 const struct cred *cred,
3be0f80b 9298 struct nfs4_slot *slot,
8fe72bac 9299 bool is_privileged)
fc01cea9 9300{
d5f8d3fe 9301 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 9302 struct rpc_message msg = {
9303 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
9304 .rpc_cred = cred,
9305 };
71ac6da9
TM		 9306 struct rpc_task_setup task_setup_data = {
9307 .rpc_client = clp->cl_rpcclient,
9308 .rpc_message = &msg,
8fe72bac 9309 .callback_ops = &nfs41_sequence_ops,
85e39fee 9310 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT | RPC_TASK_MOVEABLE,
71ac6da9 9311 };
3be0f80b 9312 struct rpc_task *ret;
fc01cea9 9313
3be0f80b 9314 ret = ERR_PTR(-EIO);
212bf41d 9315 if (!refcount_inc_not_zero(&clp->cl_count))
3be0f80b
TM		 9316 goto out_err;
9317
9318 ret = ERR_PTR(-ENOMEM);
dfb4f309 9319 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
3be0f80b
TM		 9320 if (calldata == NULL)
9321 goto out_put_clp;
fba83f34 9322 nfs4_init_sequence(&calldata->args, &calldata->res, 0, is_privileged);
3be0f80b 9323 nfs4_sequence_attach_slot(&calldata->args, &calldata->res, slot);
d5f8d3fe
TM		 9324 msg.rpc_argp = &calldata->args;
9325 msg.rpc_resp = &calldata->res;
9326 calldata->clp = clp;
71ac6da9 9327 task_setup_data.callback_data = calldata;
fc01cea9 9328
3be0f80b
TM		 9329 ret = rpc_run_task(&task_setup_data);
9330 if (IS_ERR(ret))
9331 goto out_err;
9332 return ret;
9333out_put_clp:
9334 nfs_put_client(clp);
9335out_err:
9336 nfs41_release_slot(slot);
9337 return ret;
71ac6da9
TM		 9338}
9339
a52458b4 9340static int nfs41_proc_async_sequence(struct nfs_client *clp, const struct cred *cred, unsigned renew_flags)
71ac6da9
TM		 9341{
9342 struct rpc_task *task;
9343 int ret = 0;
9344
2f60ea6b 9345 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
d1f456b0 9346 return -EAGAIN;
3be0f80b 9347 task = _nfs41_proc_sequence(clp, cred, NULL, false);
71ac6da9
TM		 9348 if (IS_ERR(task))
9349 ret = PTR_ERR(task);
9350 else
bf294b41 9351 rpc_put_task_async(task);
71ac6da9
TM		 9352 dprintk("<-- %s status=%d\n", __func__, ret);
9353 return ret;
9354}
9355
a52458b4 9356static int nfs4_proc_sequence(struct nfs_client *clp, const struct cred *cred)
71ac6da9
TM		 9357{
9358 struct rpc_task *task;
9359 int ret;
9360
3be0f80b 9361 task = _nfs41_proc_sequence(clp, cred, NULL, true);
71ac6da9
TM		 9362 if (IS_ERR(task)) {
9363 ret = PTR_ERR(task);
9364 goto out;
9365 }
9366 ret = rpc_wait_for_completion_task(task);
be824167 9367 if (!ret)
71ac6da9
TM		 9368 ret = task->tk_status;
9369 rpc_put_task(task);
9370out:
9371 dprintk("<-- %s status=%d\n", __func__, ret);
9372 return ret;
fc01cea9
AA		 9373}
9374
fce5c838
RL		 9375struct nfs4_reclaim_complete_data {
9376 struct nfs_client *clp;
9377 struct nfs41_reclaim_complete_args arg;
9378 struct nfs41_reclaim_complete_res res;
9379};
9380
9381static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
9382{
9383 struct nfs4_reclaim_complete_data *calldata = data;
9384
7981c8a6 9385 nfs4_setup_sequence(calldata->clp,
d9afbd1b
TM		 9386 &calldata->arg.seq_args,
9387 &calldata->res.seq_res,
9388 task);
fce5c838
RL		 9389}
9390
aa5190d0
TM		 9391static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
9392{
9393 switch(task->tk_status) {
9394 case 0:
57174593 9395 wake_up_all(&clp->cl_lock_waitq);
df561f66 9396 fallthrough;
aa5190d0
TM		 9397 case -NFS4ERR_COMPLETE_ALREADY:
9398 case -NFS4ERR_WRONG_CRED: /* What to do here? */
9399 break;
9400 case -NFS4ERR_DELAY:
aa5190d0 9401 rpc_delay(task, NFS4_POLL_RETRY_MAX);
df561f66 9402 fallthrough;
a8a4ae3a 9403 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0 9404 return -EAGAIN;
0048fdd0
TM		 9405 case -NFS4ERR_BADSESSION:
9406 case -NFS4ERR_DEADSESSION:
9407 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
0048fdd0 9408 break;
aa5190d0 9409 default:
0400a6b0 9410 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 9411 }
9412 return 0;
9413}
9414
fce5c838
RL		 9415static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
9416{
9417 struct nfs4_reclaim_complete_data *calldata = data;
9418 struct nfs_client *clp = calldata->clp;
9419 struct nfs4_sequence_res *res = &calldata->res.seq_res;
9420
9421 dprintk("--> %s\n", __func__);
14516c3a
TM		 9422 if (!nfs41_sequence_done(task, res))
9423 return;
fce5c838 9424
c6d01c6f 9425 trace_nfs4_reclaim_complete(clp, task->tk_status);
aa5190d0
TM		 9426 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
9427 rpc_restart_call_prepare(task);
9428 return;
9429 }
fce5c838
RL		 9430 dprintk("<-- %s\n", __func__);
9431}
9432
9433static void nfs4_free_reclaim_complete_data(void *data)
9434{
9435 struct nfs4_reclaim_complete_data *calldata = data;
9436
9437 kfree(calldata);
9438}
9439
9440static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
9441 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
9442 .rpc_call_done = nfs4_reclaim_complete_done,
9443 .rpc_release = nfs4_free_reclaim_complete_data,
9444};
9445
9446/*
9447 * Issue a global reclaim complete.
9448 */
965e9c23 9449static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
a52458b4 9450 const struct cred *cred)
fce5c838
RL		 9451{
9452 struct nfs4_reclaim_complete_data *calldata;
fce5c838
RL		 9453 struct rpc_message msg = {
9454 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 9455 .rpc_cred = cred,
fce5c838
RL		 9456 };
9457 struct rpc_task_setup task_setup_data = {
9458 .rpc_client = clp->cl_rpcclient,
9459 .rpc_message = &msg,
9460 .callback_ops = &nfs4_reclaim_complete_call_ops,
4c952e3d 9461 .flags = RPC_TASK_NO_ROUND_ROBIN,
fce5c838
RL		 9462 };
9463 int status = -ENOMEM;
9464
9465 dprintk("--> %s\n", __func__);
8535b2be 9466 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 9467 if (calldata == NULL)
9468 goto out;
9469 calldata->clp = clp;
9470 calldata->arg.one_fs = 0;
fce5c838 9471
fba83f34 9472 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0, 1);
fce5c838
RL		 9473 msg.rpc_argp = &calldata->arg;
9474 msg.rpc_resp = &calldata->res;
9475 task_setup_data.callback_data = calldata;
4c952e3d 9476 status = nfs4_call_sync_custom(&task_setup_data);
fce5c838
RL		 9477out:
9478 dprintk("<-- %s status=%d\n", __func__, status);
9479 return status;
9480}
b1f69b75
AA		 9481
9482static void
9483nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
9484{
9485 struct nfs4_layoutget *lgp = calldata;
c31663d4 9486 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
b1f69b75
AA		 9487
9488 dprintk("--> %s\n", __func__);
7981c8a6 9489 nfs4_setup_sequence(server->nfs_client, &lgp->args.seq_args,
183d9e7b
JL		 9490 &lgp->res.seq_res, task);
9491 dprintk("<-- %s\n", __func__);
b1f69b75
AA		 9492}
9493
9494static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
9495{
9496 struct nfs4_layoutget *lgp = calldata;
183d9e7b
JL		 9497
9498 dprintk("--> %s\n", __func__);
2e80dbe7 9499 nfs41_sequence_process(task, &lgp->res.seq_res);
183d9e7b
JL		 9500 dprintk("<-- %s\n", __func__);
9501}
9502
9503static int
9504nfs4_layoutget_handle_exception(struct rpc_task *task,
9505 struct nfs4_layoutget *lgp, struct nfs4_exception *exception)
9506{
ee314c2a
TM		 9507 struct inode *inode = lgp->args.inode;
9508 struct nfs_server *server = NFS_SERVER(inode);
b4e89bcb 9509 struct pnfs_layout_hdr *lo = lgp->lo;
e85d7ee4
TM		 9510 int nfs4err = task->tk_status;
9511 int err, status = 0;
f7db0b28 9512 LIST_HEAD(head);
b1f69b75 9513
ed7e5423 9514 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
b1f69b75 9515
2dbf8dff
TM		 9516 nfs4_sequence_free_slot(&lgp->res.seq_res);
9517
e85d7ee4 9518 switch (nfs4err) {
b1f69b75 9519 case 0:
ee314c2a 9520 goto out;
7c1e6e58
PT		 9521
9522 /*
9523 * NFS4ERR_LAYOUTUNAVAILABLE means we are not supposed to use pnfs
9524 * on the file. set tk_status to -ENODATA to tell upper layer to
9525 * retry go inband.
9526 */
9527 case -NFS4ERR_LAYOUTUNAVAILABLE:
183d9e7b 9528 status = -ENODATA;
7c1e6e58 9529 goto out;
21b874c8
TM		 9530 /*
9531 * NFS4ERR_BADLAYOUT means the MDS cannot return a layout of
9532 * length lgp->args.minlength != 0 (see RFC5661 section 18.43.3).
9533 */
9534 case -NFS4ERR_BADLAYOUT:
183d9e7b
JL		 9535 status = -EOVERFLOW;
9536 goto out;
ed7e5423
BH		 9537 /*
9538 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
21b874c8
TM		 9539 * (or clients) writing to the same RAID stripe except when
9540 * the minlength argument is 0 (see RFC5661 section 18.43.3).
183d9e7b
JL		 9541 *
9542 * Treat it like we would RECALLCONFLICT -- we retry for a little
9543 * while, and then eventually give up.
ed7e5423 9544 */
b1f69b75 9545 case -NFS4ERR_LAYOUTTRYLATER:
183d9e7b
JL		 9546 if (lgp->args.minlength == 0) {
9547 status = -EOVERFLOW;
9548 goto out;
ed7e5423 9549 }
e85d7ee4
TM		 9550 status = -EBUSY;
9551 break;
183d9e7b 9552 case -NFS4ERR_RECALLCONFLICT:
183d9e7b 9553 status = -ERECALLCONFLICT;
e85d7ee4 9554 break;
26f47443
TM		 9555 case -NFS4ERR_DELEG_REVOKED:
9556 case -NFS4ERR_ADMIN_REVOKED:
ee314c2a
TM		 9557 case -NFS4ERR_EXPIRED:
9558 case -NFS4ERR_BAD_STATEID:
183d9e7b 9559 exception->timeout = 0;
ee314c2a 9560 spin_lock(&inode->i_lock);
f7db0b28
TM		 9561 /* If the open stateid was bad, then recover it. */
9562 if (!lo || test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) ||
e8fa33a6 9563 !nfs4_stateid_match_other(&lgp->args.stateid, &lo->plh_stateid)) {
ee314c2a 9564 spin_unlock(&inode->i_lock);
183d9e7b 9565 exception->state = lgp->args.ctx->state;
26f47443 9566 exception->stateid = &lgp->args.stateid;
2259f960
TM		 9567 break;
9568 }
f7db0b28
TM		 9569
9570 /*
9571 * Mark the bad layout state as invalid, then retry
9572 */
668f455d 9573 pnfs_mark_layout_stateid_invalid(lo, &head);
f7db0b28 9574 spin_unlock(&inode->i_lock);
1f18b82c 9575 nfs_commit_inode(inode, 0);
f7db0b28
TM		 9576 pnfs_free_lseg_list(&head);
9577 status = -EAGAIN;
9578 goto out;
b1f69b75 9579 }
183d9e7b 9580
e85d7ee4
TM		 9581 err = nfs4_handle_exception(server, nfs4err, exception);
9582 if (!status) {
9583 if (exception->retry)
9584 status = -EAGAIN;
9585 else
9586 status = err;
9587 }
ee314c2a 9588out:
b1f69b75 9589 dprintk("<-- %s\n", __func__);
183d9e7b 9590 return status;
b1f69b75
AA		 9591}
9592
dacb452d 9593size_t max_response_pages(struct nfs_server *server)
8554116e
IK		 9594{
9595 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
9596 return nfs_page_array_len(0, max_resp_sz);
9597}
9598
b1f69b75
AA		 9599static void nfs4_layoutget_release(void *calldata)
9600{
9601 struct nfs4_layoutget *lgp = calldata;
9602
9603 dprintk("--> %s\n", __func__);
bd171930 9604 nfs4_sequence_free_slot(&lgp->res.seq_res);
29a8bfe5 9605 pnfs_layoutget_free(lgp);
b1f69b75
AA		 9606 dprintk("<-- %s\n", __func__);
9607}
9608
9609static const struct rpc_call_ops nfs4_layoutget_call_ops = {
9610 .rpc_call_prepare = nfs4_layoutget_prepare,
9611 .rpc_call_done = nfs4_layoutget_done,
9612 .rpc_release = nfs4_layoutget_release,
9613};
9614
a0b0a6e3 9615struct pnfs_layout_segment *
dacb452d 9616nfs4_proc_layoutget(struct nfs4_layoutget *lgp, long *timeout)
b1f69b75 9617{
a47970ff
WAA		 9618 struct inode *inode = lgp->args.inode;
9619 struct nfs_server *server = NFS_SERVER(inode);
b1f69b75
AA		 9620 struct rpc_task *task;
9621 struct rpc_message msg = {
9622 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
9623 .rpc_argp = &lgp->args,
9624 .rpc_resp = &lgp->res,
6ab59344 9625 .rpc_cred = lgp->cred,
b1f69b75
AA		 9626 };
9627 struct rpc_task_setup task_setup_data = {
9628 .rpc_client = server->client,
9629 .rpc_message = &msg,
9630 .callback_ops = &nfs4_layoutget_call_ops,
9631 .callback_data = lgp,
85e39fee
OK		 9632 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF |
9633 RPC_TASK_MOVEABLE,
b1f69b75 9634 };
a0b0a6e3 9635 struct pnfs_layout_segment *lseg = NULL;
bc23676c
TM		 9636 struct nfs4_exception exception = {
9637 .inode = inode,
9638 .timeout = *timeout,
9639 };
b1f69b75
AA		 9640 int status = 0;
9641
9642 dprintk("--> %s\n", __func__);
9643
fba83f34 9644 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0, 0);
a47970ff 9645
b1f69b75 9646 task = rpc_run_task(&task_setup_data);
6e47666e 9647
820bf85c 9648 status = rpc_wait_for_completion_task(task);
2dbf8dff
TM		 9649 if (status != 0)
9650 goto out;
9651
18c0778a 9652 if (task->tk_status < 0) {
183d9e7b
JL		 9653 status = nfs4_layoutget_handle_exception(task, lgp, &exception);
9654 *timeout = exception.timeout;
18c0778a
TM		 9655 } else if (lgp->res.layoutp->len == 0) {
9656 status = -EAGAIN;
9657 *timeout = nfs4_update_delay(&exception.timeout);
2dbf8dff
TM		 9658 } else
9659 lseg = pnfs_layout_process(lgp);
9660out:
1037e6ea
TM		 9661 trace_nfs4_layoutget(lgp->args.ctx,
9662 &lgp->args.range,
9663 &lgp->res.range,
48c9579a 9664 &lgp->res.stateid,
1037e6ea 9665 status);
183d9e7b 9666
b1f69b75
AA		 9667 rpc_put_task(task);
9668 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 9669 if (status)
9670 return ERR_PTR(status);
9671 return lseg;
b1f69b75
AA		 9672}
9673
cbe82603
BH		 9674static void
9675nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
9676{
9677 struct nfs4_layoutreturn *lrp = calldata;
9678
9679 dprintk("--> %s\n", __func__);
7981c8a6 9680 nfs4_setup_sequence(lrp->clp,
d9afbd1b
TM		 9681 &lrp->args.seq_args,
9682 &lrp->res.seq_res,
9683 task);
c8bf7073
TM		 9684 if (!pnfs_layout_is_valid(lrp->args.layout))
9685 rpc_exit(task, 0);
cbe82603
BH		 9686}
9687
9688static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
9689{
9690 struct nfs4_layoutreturn *lrp = calldata;
9691 struct nfs_server *server;
9692
9693 dprintk("--> %s\n", __func__);
9694
2e80dbe7 9695 if (!nfs41_sequence_process(task, &lrp->res.seq_res))
cbe82603
BH		 9696 return;
9697
6109bcf7
TM		 9698 /*
9699 * Was there an RPC level error? Assume the call succeeded,
9700 * and that we need to release the layout
9701 */
9702 if (task->tk_rpc_status != 0 && RPC_WAS_SENT(task)) {
9703 lrp->res.lrs_present = 0;
9704 return;
9705 }
9706
cbe82603 9707 server = NFS_SERVER(lrp->args.inode);
f22e5edd 9708 switch (task->tk_status) {
ff90514e 9709 case -NFS4ERR_OLD_STATEID:
30cb3ee2 9710 if (nfs4_layout_refresh_old_stateid(&lrp->args.stateid,
ecf84026 9711 &lrp->args.range,
ff90514e
TM		 9712 lrp->args.inode))
9713 goto out_restart;
df561f66 9714 fallthrough;
f22e5edd
TM		 9715 default:
9716 task->tk_status = 0;
df561f66 9717 fallthrough;
f22e5edd
TM		 9718 case 0:
9719 break;
9720 case -NFS4ERR_DELAY:
8478eaa1 9721 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
f22e5edd 9722 break;
ff90514e 9723 goto out_restart;
cbe82603 9724 }
cbe82603 9725 dprintk("<-- %s\n", __func__);
ff90514e
TM		 9726 return;
9727out_restart:
9728 task->tk_status = 0;
9729 nfs4_sequence_free_slot(&lrp->res.seq_res);
9730 rpc_restart_call_prepare(task);
cbe82603
BH		 9731}
9732
9733static void nfs4_layoutreturn_release(void *calldata)
9734{
9735 struct nfs4_layoutreturn *lrp = calldata;
849b286f 9736 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 9737
9738 dprintk("--> %s\n", __func__);
2a974425 9739 pnfs_layoutreturn_free_lsegs(lo, &lrp->args.stateid, &lrp->args.range,
68f74479 9740 lrp->res.lrs_present ? &lrp->res.stateid : NULL);
2e80dbe7 9741 nfs4_sequence_free_slot(&lrp->res.seq_res);
4d796d75
TM		 9742 if (lrp->ld_private.ops && lrp->ld_private.ops->free)
9743 lrp->ld_private.ops->free(&lrp->ld_private);
2f065ddb
TM		 9744 pnfs_put_layout_hdr(lrp->args.layout);
9745 nfs_iput_and_deactive(lrp->inode);
44ea8dfc 9746 put_cred(lrp->cred);
cbe82603
BH		 9747 kfree(calldata);
9748 dprintk("<-- %s\n", __func__);
9749}
9750
9751static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
9752 .rpc_call_prepare = nfs4_layoutreturn_prepare,
9753 .rpc_call_done = nfs4_layoutreturn_done,
9754 .rpc_release = nfs4_layoutreturn_release,
9755};
9756
6c16605d 9757int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync)
cbe82603
BH		 9758{
9759 struct rpc_task *task;
9760 struct rpc_message msg = {
9761 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
9762 .rpc_argp = &lrp->args,
9763 .rpc_resp = &lrp->res,
9556000d 9764 .rpc_cred = lrp->cred,
cbe82603
BH		 9765 };
9766 struct rpc_task_setup task_setup_data = {
1771c577 9767 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
cbe82603
BH		 9768 .rpc_message = &msg,
9769 .callback_ops = &nfs4_layoutreturn_call_ops,
9770 .callback_data = lrp,
85e39fee 9771 .flags = RPC_TASK_MOVEABLE,
cbe82603 9772 };
6c16605d 9773 int status = 0;
cbe82603 9774
99ade3c7
AE		 9775 nfs4_state_protect(NFS_SERVER(lrp->args.inode)->nfs_client,
9776 NFS_SP4_MACH_CRED_PNFS_CLEANUP,
9777 &task_setup_data.rpc_client, &msg);
9778
cbe82603 9779 dprintk("--> %s\n", __func__);
c3aba897 9780 lrp->inode = nfs_igrab_and_active(lrp->args.inode);
5a0ec8ac 9781 if (!sync) {
5a0ec8ac
TM		 9782 if (!lrp->inode) {
9783 nfs4_layoutreturn_release(lrp);
9784 return -EAGAIN;
9785 }
9786 task_setup_data.flags |= RPC_TASK_ASYNC;
9787 }
c3aba897
TM		 9788 if (!lrp->inode)
9789 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1,
9790 1);
9791 else
9792 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1,
9793 0);
cbe82603
BH		 9794 task = rpc_run_task(&task_setup_data);
9795 if (IS_ERR(task))
9796 return PTR_ERR(task);
5a0ec8ac
TM		 9797 if (sync)
9798 status = task->tk_status;
48c9579a 9799 trace_nfs4_layoutreturn(lrp->args.inode, &lrp->args.stateid, status);
cbe82603
BH		 9800 dprintk("<-- %s status=%d\n", __func__, status);
9801 rpc_put_task(task);
9802 return status;
9803}
9804
b1f69b75 9805static int
cd5875fe
TM		 9806_nfs4_proc_getdeviceinfo(struct nfs_server *server,
9807 struct pnfs_device *pdev,
a52458b4 9808 const struct cred *cred)
b1f69b75
AA		 9809{
9810 struct nfs4_getdeviceinfo_args args = {
9811 .pdev = pdev,
4e590803
TM		 9812 .notify_types = NOTIFY_DEVICEID4_CHANGE |
9813 NOTIFY_DEVICEID4_DELETE,
b1f69b75
AA		 9814 };
9815 struct nfs4_getdeviceinfo_res res = {
9816 .pdev = pdev,
9817 };
9818 struct rpc_message msg = {
9819 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
9820 .rpc_argp = &args,
9821 .rpc_resp = &res,
cd5875fe 9822 .rpc_cred = cred,
b1f69b75
AA		 9823 };
9824 int status;
9825
9826 dprintk("--> %s\n", __func__);
7c513058 9827 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4e590803
TM		 9828 if (res.notification & ~args.notify_types)
9829 dprintk("%s: unsupported notification\n", __func__);
df52699e
TM		 9830 if (res.notification != args.notify_types)
9831 pdev->nocache = 1;
4e590803 9832
cac1d3a2
TM		 9833 trace_nfs4_getdeviceinfo(server, &pdev->dev_id, status);
9834
b1f69b75
AA		 9835 dprintk("<-- %s status=%d\n", __func__, status);
9836
9837 return status;
9838}
9839
cd5875fe
TM		 9840int nfs4_proc_getdeviceinfo(struct nfs_server *server,
9841 struct pnfs_device *pdev,
a52458b4 9842 const struct cred *cred)
b1f69b75
AA		 9843{
9844 struct nfs4_exception exception = { };
9845 int err;
9846
9847 do {
9848 err = nfs4_handle_exception(server,
cd5875fe 9849 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 9850 &exception);
9851 } while (exception.retry);
9852 return err;
9853}
9854EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
9855
863a3c6c
AA		 9856static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
9857{
9858 struct nfs4_layoutcommit_data *data = calldata;
9859 struct nfs_server *server = NFS_SERVER(data->args.inode);
9860
7981c8a6 9861 nfs4_setup_sequence(server->nfs_client,
d9afbd1b
TM		 9862 &data->args.seq_args,
9863 &data->res.seq_res,
9864 task);
863a3c6c
AA		 9865}
9866
9867static void
9868nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
9869{
9870 struct nfs4_layoutcommit_data *data = calldata;
9871 struct nfs_server *server = NFS_SERVER(data->args.inode);
9872
6ba7db34 9873 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 9874 return;
9875
9876 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 9877 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
9878 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
9879 case -NFS4ERR_BADLAYOUT: /* no layout */
9880 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 9881 task->tk_status = 0;
ffb81717 9882 break;
e59d27e0 9883 case 0:
e59d27e0
TM		 9884 break;
9885 default:
8478eaa1 9886 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) {
e59d27e0
TM		 9887 rpc_restart_call_prepare(task);
9888 return;
9889 }
9890 }
863a3c6c
AA		 9891}
9892
9893static void nfs4_layoutcommit_release(void *calldata)
9894{
9895 struct nfs4_layoutcommit_data *data = calldata;
9896
db29c089 9897 pnfs_cleanup_layoutcommit(data);
d8c951c3
TM		 9898 nfs_post_op_update_inode_force_wcc(data->args.inode,
9899 data->res.fattr);
a52458b4 9900 put_cred(data->cred);
472e2594 9901 nfs_iput_and_deactive(data->inode);
863a3c6c
AA		 9902 kfree(data);
9903}
9904
9905static const struct rpc_call_ops nfs4_layoutcommit_ops = {
9906 .rpc_call_prepare = nfs4_layoutcommit_prepare,
9907 .rpc_call_done = nfs4_layoutcommit_done,
9908 .rpc_release = nfs4_layoutcommit_release,
9909};
9910
9911int
ef311537 9912nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 9913{
9914 struct rpc_message msg = {
9915 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
9916 .rpc_argp = &data->args,
9917 .rpc_resp = &data->res,
9918 .rpc_cred = data->cred,
9919 };
9920 struct rpc_task_setup task_setup_data = {
9921 .task = &data->task,
9922 .rpc_client = NFS_CLIENT(data->args.inode),
9923 .rpc_message = &msg,
9924 .callback_ops = &nfs4_layoutcommit_ops,
9925 .callback_data = data,
85e39fee 9926 .flags = RPC_TASK_MOVEABLE,
863a3c6c
AA		 9927 };
9928 struct rpc_task *task;
9929 int status = 0;
9930
b4839ebe
KM		 9931 dprintk("NFS: initiating layoutcommit call. sync %d "
9932 "lbw: %llu inode %lu\n", sync,
863a3c6c
AA		 9933 data->args.lastbytewritten,
9934 data->args.inode->i_ino);
9935
472e2594
TM		 9936 if (!sync) {
9937 data->inode = nfs_igrab_and_active(data->args.inode);
9938 if (data->inode == NULL) {
9939 nfs4_layoutcommit_release(data);
9940 return -EAGAIN;
9941 }
9942 task_setup_data.flags = RPC_TASK_ASYNC;
9943 }
fba83f34 9944 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 0);
863a3c6c
AA		 9945 task = rpc_run_task(&task_setup_data);
9946 if (IS_ERR(task))
9947 return PTR_ERR(task);
472e2594
TM		 9948 if (sync)
9949 status = task->tk_status;
48c9579a 9950 trace_nfs4_layoutcommit(data->args.inode, &data->args.stateid, status);
863a3c6c
AA		 9951 dprintk("%s: status %d\n", __func__, status);
9952 rpc_put_task(task);
9953 return status;
9954}
fca78d6d 9955
302fad7b 9956/*
97431204
AA		 9957 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
9958 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
9959 */
fca78d6d
BS		 9960static int
9961_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
b1b3e136
WAA		 9962 struct nfs_fsinfo *info,
9963 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
fca78d6d
BS		 9964{
9965 struct nfs41_secinfo_no_name_args args = {
9966 .style = SECINFO_STYLE_CURRENT_FH,
9967 };
9968 struct nfs4_secinfo_res res = {
9969 .flavors = flavors,
9970 };
9971 struct rpc_message msg = {
9972 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
9973 .rpc_argp = &args,
9974 .rpc_resp = &res,
9975 };
cc15e24a
AS		 9976 struct nfs4_call_sync_data data = {
9977 .seq_server = server,
9978 .seq_args = &args.seq_args,
9979 .seq_res = &res.seq_res,
9980 };
9981 struct rpc_task_setup task_setup = {
9982 .rpc_client = server->client,
9983 .rpc_message = &msg,
9984 .callback_ops = server->nfs_client->cl_mvops->call_sync_ops,
9985 .callback_data = &data,
9986 .flags = RPC_TASK_NO_ROUND_ROBIN,
9987 };
a52458b4 9988 const struct cred *cred = NULL;
b1b3e136
WAA		 9989 int status;
9990
9991 if (use_integrity) {
48bb6ec1 9992 task_setup.rpc_client = server->nfs_client->cl_rpcclient;
cc15e24a 9993
7cb852df
WAA		 9994 cred = nfs4_get_clid_cred(server->nfs_client);
9995 msg.rpc_cred = cred;
b1b3e136
WAA		 9996 }
9997
9998 dprintk("--> %s\n", __func__);
cc15e24a
AS		 9999 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0);
10000 status = nfs4_call_sync_custom(&task_setup);
b1b3e136
WAA		 10001 dprintk("<-- %s status=%d\n", __func__, status);
10002
a52458b4 10003 put_cred(cred);
b1b3e136
WAA		 10004
10005 return status;
fca78d6d
BS		 10006}
10007
10008static int
10009nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
10010 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
10011{
0688e64b
TM		 10012 struct nfs4_exception exception = {
10013 .interruptible = true,
10014 };
fca78d6d
BS		 10015 int err;
10016 do {
b1b3e136
WAA		 10017 /* first try using integrity protection */
10018 err = -NFS4ERR_WRONGSEC;
10019
10020 /* try to use integrity protection with machine cred */
10021 if (_nfs4_is_integrity_protected(server->nfs_client))
10022 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
10023 flavors, true);
10024
10025 /*
10026 * if unable to use integrity protection, or SECINFO with
10027 * integrity protection returns NFS4ERR_WRONGSEC (which is
10028 * disallowed by spec, but exists in deployed servers) use
10029 * the current filesystem's rpc_client and the user cred.
10030 */
10031 if (err == -NFS4ERR_WRONGSEC)
10032 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
10033 flavors, false);
10034
fca78d6d
BS		 10035 switch (err) {
10036 case 0:
10037 case -NFS4ERR_WRONGSEC:
78b19bae 10038 case -ENOTSUPP:
05e9cfb4 10039 goto out;
fca78d6d
BS		 10040 default:
10041 err = nfs4_handle_exception(server, err, &exception);
10042 }
10043 } while (exception.retry);
05e9cfb4 10044out:
fca78d6d
BS		 10045 return err;
10046}
10047
10048static int
10049nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
10050 struct nfs_fsinfo *info)
10051{
10052 int err;
10053 struct page *page;
367156d9 10054 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
fca78d6d 10055 struct nfs4_secinfo_flavors *flavors;
58a8cf12
WAA		 10056 struct nfs4_secinfo4 *secinfo;
10057 int i;
fca78d6d
BS		 10058
10059 page = alloc_page(GFP_KERNEL);
10060 if (!page) {
10061 err = -ENOMEM;
10062 goto out;
10063 }
10064
10065 flavors = page_address(page);
10066 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
10067
10068 /*
10069 * Fall back on "guess and check" method if
10070 * the server doesn't support SECINFO_NO_NAME
10071 */
78b19bae 10072 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
fca78d6d
BS		 10073 err = nfs4_find_root_sec(server, fhandle, info);
10074 goto out_freepage;
10075 }
10076 if (err)
10077 goto out_freepage;
10078
58a8cf12
WAA		 10079 for (i = 0; i < flavors->num_flavors; i++) {
10080 secinfo = &flavors->flavors[i];
10081
10082 switch (secinfo->flavor) {
10083 case RPC_AUTH_NULL:
10084 case RPC_AUTH_UNIX:
10085 case RPC_AUTH_GSS:
10086 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
10087 &secinfo->flavor_info);
10088 break;
10089 default:
10090 flavor = RPC_AUTH_MAXFLAVOR;
10091 break;
10092 }
10093
4d4b69dd
WAA		 10094 if (!nfs_auth_info_match(&server->auth_info, flavor))
10095 flavor = RPC_AUTH_MAXFLAVOR;
10096
58a8cf12
WAA		 10097 if (flavor != RPC_AUTH_MAXFLAVOR) {
10098 err = nfs4_lookup_root_sec(server, fhandle,
10099 info, flavor);
10100 if (!err)
10101 break;
10102 }
10103 }
10104
10105 if (flavor == RPC_AUTH_MAXFLAVOR)
10106 err = -EPERM;
fca78d6d
BS		 10107
10108out_freepage:
10109 put_page(page);
10110 if (err == -EACCES)
10111 return -EPERM;
10112out:
10113 return err;
10114}
1cab0652 10115
ab7cb0df
TM		 10116static int _nfs41_test_stateid(struct nfs_server *server,
10117 nfs4_stateid *stateid,
a52458b4 10118 const struct cred *cred)
7d974794
BS		 10119{
10120 int status;
10121 struct nfs41_test_stateid_args args = {
1cab0652 10122 .stateid = stateid,
7d974794
BS		 10123 };
10124 struct nfs41_test_stateid_res res;
10125 struct rpc_message msg = {
10126 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
10127 .rpc_argp = &args,
10128 .rpc_resp = &res,
ab7cb0df 10129 .rpc_cred = cred,
7d974794 10130 };
3787d506
WAA		 10131 struct rpc_clnt *rpc_client = server->client;
10132
10133 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
10134 &rpc_client, &msg);
1cab0652 10135
38527b15 10136 dprintk("NFS call test_stateid %p\n", stateid);
fba83f34 10137 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1);
3787d506 10138 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8fe72bac 10139 &args.seq_args, &res.seq_res);
38527b15
CL		 10140 if (status != NFS_OK) {
10141 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 10142 return status;
38527b15
CL		 10143 }
10144 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 10145 return -res.status;
7d974794
BS		 10146}
10147
43912bbb
TM		 10148static void nfs4_handle_delay_or_session_error(struct nfs_server *server,
10149 int err, struct nfs4_exception *exception)
10150{
10151 exception->retry = 0;
10152 switch(err) {
10153 case -NFS4ERR_DELAY:
76e8a1bd 10154 case -NFS4ERR_RETRY_UNCACHED_REP:
43912bbb
TM		 10155 nfs4_handle_exception(server, err, exception);
10156 break;
10157 case -NFS4ERR_BADSESSION:
10158 case -NFS4ERR_BADSLOT:
10159 case -NFS4ERR_BAD_HIGH_SLOT:
10160 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
10161 case -NFS4ERR_DEADSESSION:
10162 nfs4_do_handle_exception(server, err, exception);
10163 }
10164}
10165
38527b15
CL		 10166/**
10167 * nfs41_test_stateid - perform a TEST_STATEID operation
10168 *
10169 * @server: server / transport on which to perform the operation
10170 * @stateid: state ID to test
ab7cb0df 10171 * @cred: credential
38527b15
CL		 10172 *
10173 * Returns NFS_OK if the server recognizes that "stateid" is valid.
10174 * Otherwise a negative NFS4ERR value is returned if the operation
10175 * failed or the state ID is not currently valid.
10176 */
ab7cb0df
TM		 10177static int nfs41_test_stateid(struct nfs_server *server,
10178 nfs4_stateid *stateid,
a52458b4 10179 const struct cred *cred)
7d974794 10180{
0688e64b
TM		 10181 struct nfs4_exception exception = {
10182 .interruptible = true,
10183 };
7d974794
BS		 10184 int err;
10185 do {
ab7cb0df 10186 err = _nfs41_test_stateid(server, stateid, cred);
43912bbb 10187 nfs4_handle_delay_or_session_error(server, err, &exception);
7d974794
BS		 10188 } while (exception.retry);
10189 return err;
10190}
9aeda35f 10191
7c1d5fae
TM		 10192struct nfs_free_stateid_data {
10193 struct nfs_server *server;
10194 struct nfs41_free_stateid_args args;
9aeda35f 10195 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 10196};
10197
10198static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
10199{
10200 struct nfs_free_stateid_data *data = calldata;
7981c8a6 10201 nfs4_setup_sequence(data->server->nfs_client,
7c1d5fae
TM		 10202 &data->args.seq_args,
10203 &data->res.seq_res,
10204 task);
10205}
10206
10207static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
10208{
10209 struct nfs_free_stateid_data *data = calldata;
10210
10211 nfs41_sequence_done(task, &data->res.seq_res);
10212
10213 switch (task->tk_status) {
10214 case -NFS4ERR_DELAY:
8478eaa1 10215 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN)
7c1d5fae
TM		 10216 rpc_restart_call_prepare(task);
10217 }
10218}
10219
10220static void nfs41_free_stateid_release(void *calldata)
10221{
10222 kfree(calldata);
10223}
10224
17f26b12 10225static const struct rpc_call_ops nfs41_free_stateid_ops = {
7c1d5fae
TM		 10226 .rpc_call_prepare = nfs41_free_stateid_prepare,
10227 .rpc_call_done = nfs41_free_stateid_done,
10228 .rpc_release = nfs41_free_stateid_release,
10229};
10230
2f261020
AS		 10231/**
10232 * nfs41_free_stateid - perform a FREE_STATEID operation
10233 *
10234 * @server: server / transport on which to perform the operation
10235 * @stateid: state ID to release
10236 * @cred: credential
302fad7b 10237 * @privileged: set to true if this call needs to be privileged
2f261020
AS		 10238 *
10239 * Note: this function is always asynchronous.
10240 */
10241static int nfs41_free_stateid(struct nfs_server *server,
f0b0bf88 10242 const nfs4_stateid *stateid,
a52458b4 10243 const struct cred *cred,
7c1d5fae
TM		 10244 bool privileged)
10245{
9aeda35f
BS		 10246 struct rpc_message msg = {
10247 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 10248 .rpc_cred = cred,
9aeda35f 10249 };
7c1d5fae
TM		 10250 struct rpc_task_setup task_setup = {
10251 .rpc_client = server->client,
10252 .rpc_message = &msg,
10253 .callback_ops = &nfs41_free_stateid_ops,
85e39fee 10254 .flags = RPC_TASK_ASYNC | RPC_TASK_MOVEABLE,
7c1d5fae
TM		 10255 };
10256 struct nfs_free_stateid_data *data;
2f261020 10257 struct rpc_task *task;
9aeda35f 10258
3787d506
WAA		 10259 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
10260 &task_setup.rpc_client, &msg);
10261
38527b15 10262 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 10263 data = kmalloc(sizeof(*data), GFP_NOFS);
10264 if (!data)
2f261020 10265 return -ENOMEM;
7c1d5fae
TM		 10266 data->server = server;
10267 nfs4_stateid_copy(&data->args.stateid, stateid);
10268
10269 task_setup.callback_data = data;
10270
10271 msg.rpc_argp = &data->args;
10272 msg.rpc_resp = &data->res;
fba83f34 10273 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, privileged);
2f261020 10274 task = rpc_run_task(&task_setup);
7c1d5fae
TM		 10275 if (IS_ERR(task))
10276 return PTR_ERR(task);
7c1d5fae 10277 rpc_put_task(task);
f0b0bf88 10278 return 0;
9aeda35f 10279}
36281caa 10280
f1cdae87
JL		 10281static void
10282nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
c8b2d0bf 10283{
a52458b4 10284 const struct cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 10285
f0b0bf88 10286 nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf 10287 nfs4_free_lock_state(server, lsp);
c8b2d0bf
TM		 10288}
10289
36281caa
TM		 10290static bool nfs41_match_stateid(const nfs4_stateid *s1,
10291 const nfs4_stateid *s2)
10292{
93b717fd
TM		 10293 if (s1->type != s2->type)
10294 return false;
10295
2d2f24ad 10296 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 10297 return false;
10298
2d2f24ad 10299 if (s1->seqid == s2->seqid)
36281caa 10300 return true;
36281caa 10301
045c5519 10302 return s1->seqid == 0 || s2->seqid == 0;
36281caa
TM		 10303}
10304
557134a3
AA		 10305#endif /* CONFIG_NFS_V4_1 */
10306
36281caa
TM		 10307static bool nfs4_match_stateid(const nfs4_stateid *s1,
10308 const nfs4_stateid *s2)
10309{
f597c537 10310 return nfs4_stateid_match(s1, s2);
36281caa
TM		 10311}
10312
10313
17280175 10314static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 10315 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 10316 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 10317 .recover_open = nfs4_open_reclaim,
10318 .recover_lock = nfs4_lock_reclaim,
591d71cb 10319 .establish_clid = nfs4_init_clientid,
05f4c350 10320 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 10321};
10322
591d71cb 10323#if defined(CONFIG_NFS_V4_1)
17280175 10324static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 10325 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
10326 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
10327 .recover_open = nfs4_open_reclaim,
10328 .recover_lock = nfs4_lock_reclaim,
4d643d1d 10329 .establish_clid = nfs41_init_clientid,
fce5c838 10330 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 10331 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 10332};
10333#endif /* CONFIG_NFS_V4_1 */
10334
17280175 10335static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 10336 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
10337 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
4dfd4f7a 10338 .recover_open = nfs40_open_expired,
591d71cb
AA		 10339 .recover_lock = nfs4_lock_expired,
10340 .establish_clid = nfs4_init_clientid,
10341};
10342
10343#if defined(CONFIG_NFS_V4_1)
17280175 10344static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 10345 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 10346 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 10347 .recover_open = nfs41_open_expired,
10348 .recover_lock = nfs41_lock_expired,
4d643d1d 10349 .establish_clid = nfs41_init_clientid,
1da177e4 10350};
591d71cb 10351#endif /* CONFIG_NFS_V4_1 */
1da177e4 10352
17280175 10353static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 10354 .sched_state_renewal = nfs4_proc_async_renew,
f15e1e8b 10355 .get_state_renewal_cred = nfs4_get_renew_cred,
8e69514f 10356 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 10357};
10358
10359#if defined(CONFIG_NFS_V4_1)
17280175 10360static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 10361 .sched_state_renewal = nfs41_proc_async_sequence,
f15e1e8b 10362 .get_state_renewal_cred = nfs4_get_machine_cred,
8e69514f 10363 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 10364};
10365#endif
10366
ec011fe8 10367static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
b03d735b 10368 .get_locations = _nfs40_proc_get_locations,
44c99933 10369 .fsid_present = _nfs40_proc_fsid_present,
ec011fe8
CL		 10370};
10371
10372#if defined(CONFIG_NFS_V4_1)
10373static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
b03d735b 10374 .get_locations = _nfs41_proc_get_locations,
44c99933 10375 .fsid_present = _nfs41_proc_fsid_present,
ec011fe8
CL		 10376};
10377#endif /* CONFIG_NFS_V4_1 */
10378
97dc1359
TM		 10379static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
10380 .minor_version = 0,
39c6daae
TM		 10381 .init_caps = NFS_CAP_READDIRPLUS
10382 | NFS_CAP_ATOMIC_OPEN
39c6daae 10383 | NFS_CAP_POSIX_LOCK,
abf79bb3
CL		 10384 .init_client = nfs40_init_client,
10385 .shutdown_client = nfs40_shutdown_client,
36281caa 10386 .match_stateid = nfs4_match_stateid,
fca78d6d 10387 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 10388 .free_lock_state = nfs4_release_lockowner,
45870d69 10389 .test_and_free_expired = nfs40_test_and_free_expired_stateid,
63f5f796 10390 .alloc_seqid = nfs_alloc_seqid,
9915ea7e 10391 .call_sync_ops = &nfs40_call_sync_ops,
c48f4f35
TM		 10392 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
10393 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
10394 .state_renewal_ops = &nfs40_state_renewal_ops,
ec011fe8 10395 .mig_recovery_ops = &nfs40_mig_recovery_ops,
97dc1359
TM		 10396};
10397
10398#if defined(CONFIG_NFS_V4_1)
63f5f796
TM		 10399static struct nfs_seqid *
10400nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2)
10401{
10402 return NULL;
10403}
10404
97dc1359
TM		 10405static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
10406 .minor_version = 1,
39c6daae
TM		 10407 .init_caps = NFS_CAP_READDIRPLUS
10408 | NFS_CAP_ATOMIC_OPEN
3b66486c 10409 | NFS_CAP_POSIX_LOCK
49f9a0fa 10410 | NFS_CAP_STATEID_NFSV41
6e01260c
FI		 10411 | NFS_CAP_ATOMIC_OPEN_V1
10412 | NFS_CAP_LGOPEN,
abf79bb3
CL		 10413 .init_client = nfs41_init_client,
10414 .shutdown_client = nfs41_shutdown_client,
36281caa 10415 .match_stateid = nfs41_match_stateid,
fca78d6d 10416 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 10417 .free_lock_state = nfs41_free_lock_state,
45870d69 10418 .test_and_free_expired = nfs41_test_and_free_expired_stateid,
63f5f796 10419 .alloc_seqid = nfs_alloc_no_seqid,
04fa2c6b 10420 .session_trunk = nfs4_test_session_trunk,
9915ea7e 10421 .call_sync_ops = &nfs41_call_sync_ops,
c48f4f35
TM		 10422 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
10423 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
10424 .state_renewal_ops = &nfs41_state_renewal_ops,
ec011fe8 10425 .mig_recovery_ops = &nfs41_mig_recovery_ops,
97dc1359
TM		 10426};
10427#endif
10428
42c2c424
SD		 10429#if defined(CONFIG_NFS_V4_2)
10430static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
10431 .minor_version = 2,
7017310a
BS		 10432 .init_caps = NFS_CAP_READDIRPLUS
10433 | NFS_CAP_ATOMIC_OPEN
7017310a
BS		 10434 | NFS_CAP_POSIX_LOCK
10435 | NFS_CAP_STATEID_NFSV41
e983120e 10436 | NFS_CAP_ATOMIC_OPEN_V1
6e01260c 10437 | NFS_CAP_LGOPEN
f4ac1674 10438 | NFS_CAP_ALLOCATE
2e72448b 10439 | NFS_CAP_COPY
cb95deea 10440 | NFS_CAP_OFFLOAD_CANCEL
0491567b 10441 | NFS_CAP_COPY_NOTIFY
624bd5b7 10442 | NFS_CAP_DEALLOCATE
6c5a0d89 10443 | NFS_CAP_SEEK
e5341f3a 10444 | NFS_CAP_LAYOUTSTATS
3eb86093 10445 | NFS_CAP_CLONE
c5675526
AS		 10446 | NFS_CAP_LAYOUTERROR
10447 | NFS_CAP_READ_PLUS,
abf79bb3
CL		 10448 .init_client = nfs41_init_client,
10449 .shutdown_client = nfs41_shutdown_client,
42c2c424
SD		 10450 .match_stateid = nfs41_match_stateid,
10451 .find_root_sec = nfs41_find_root_sec,
7017310a 10452 .free_lock_state = nfs41_free_lock_state,
9915ea7e 10453 .call_sync_ops = &nfs41_call_sync_ops,
45870d69 10454 .test_and_free_expired = nfs41_test_and_free_expired_stateid,
63f5f796 10455 .alloc_seqid = nfs_alloc_no_seqid,
04fa2c6b 10456 .session_trunk = nfs4_test_session_trunk,
42c2c424
SD		 10457 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
10458 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
10459 .state_renewal_ops = &nfs41_state_renewal_ops,
18e3b739 10460 .mig_recovery_ops = &nfs41_mig_recovery_ops,
42c2c424
SD		 10461};
10462#endif
10463
97dc1359
TM		 10464const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
10465 [0] = &nfs_v4_0_minor_ops,
10466#if defined(CONFIG_NFS_V4_1)
10467 [1] = &nfs_v4_1_minor_ops,
10468#endif
42c2c424
SD		 10469#if defined(CONFIG_NFS_V4_2)
10470 [2] = &nfs_v4_2_minor_ops,
10471#endif
97dc1359
TM		 10472};
10473
13997823 10474static ssize_t nfs4_listxattr(struct dentry *dentry, char *list, size_t size)
c4803c49 10475{
012a211a 10476 ssize_t error, error2, error3;
c4803c49
AG		 10477
10478 error = generic_listxattr(dentry, list, size);
10479 if (error < 0)
10480 return error;
10481 if (list) {
10482 list += error;
10483 size -= error;
10484 }
10485
10486 error2 = nfs4_listxattr_nfs4_label(d_inode(dentry), list, size);
10487 if (error2 < 0)
10488 return error2;
012a211a
FL		 10489
10490 if (list) {
10491 list += error2;
10492 size -= error2;
10493 }
10494
10495 error3 = nfs4_listxattr_nfs4_user(d_inode(dentry), list, size);
10496 if (error3 < 0)
10497 return error3;
10498
10499 return error + error2 + error3;
c4803c49
AG		 10500}
10501
17f26b12 10502static const struct inode_operations nfs4_dir_inode_operations = {
73a79706
BS		 10503 .create = nfs_create,
10504 .lookup = nfs_lookup,
10505 .atomic_open = nfs_atomic_open,
10506 .link = nfs_link,
10507 .unlink = nfs_unlink,
10508 .symlink = nfs_symlink,
10509 .mkdir = nfs_mkdir,
10510 .rmdir = nfs_rmdir,
10511 .mknod = nfs_mknod,
10512 .rename = nfs_rename,
10513 .permission = nfs_permission,
10514 .getattr = nfs_getattr,
10515 .setattr = nfs_setattr,
c4803c49 10516 .listxattr = nfs4_listxattr,
73a79706
BS		 10517};
10518
92e1d5be 10519static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 10520 .permission = nfs_permission,
10521 .getattr = nfs_getattr,
10522 .setattr = nfs_setattr,
c4803c49 10523 .listxattr = nfs4_listxattr,
6b3b5496
BF		 10524};
10525
509de811 10526const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 10527 .version = 4, /* protocol version */
10528 .dentry_ops = &nfs4_dentry_operations,
10529 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 10530 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 10531 .file_ops = &nfs4_file_operations,
1da177e4 10532 .getroot = nfs4_proc_get_root,
281cad46 10533 .submount = nfs4_submount,
f2aedb71 10534 .try_get_tree = nfs4_try_get_tree,
1da177e4
LT		 10535 .getattr = nfs4_proc_getattr,
10536 .setattr = nfs4_proc_setattr,
10537 .lookup = nfs4_proc_lookup,
5b5faaf6 10538 .lookupp = nfs4_proc_lookupp,
1da177e4
LT		 10539 .access = nfs4_proc_access,
10540 .readlink = nfs4_proc_readlink,
1da177e4
LT		 10541 .create = nfs4_proc_create,
10542 .remove = nfs4_proc_remove,
10543 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 10544 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4 10545 .unlink_done = nfs4_proc_unlink_done,
d3d4152a 10546 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 10547 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 10548 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 10549 .link = nfs4_proc_link,
10550 .symlink = nfs4_proc_symlink,
10551 .mkdir = nfs4_proc_mkdir,
912678db 10552 .rmdir = nfs4_proc_rmdir,
1da177e4
LT		 10553 .readdir = nfs4_proc_readdir,
10554 .mknod = nfs4_proc_mknod,
10555 .statfs = nfs4_proc_statfs,
10556 .fsinfo = nfs4_proc_fsinfo,
10557 .pathconf = nfs4_proc_pathconf,
e9326dca 10558 .set_capabilities = nfs4_server_capabilities,
1da177e4 10559 .decode_dirent = nfs4_decode_dirent,
a4cdda59 10560 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
1da177e4 10561 .read_setup = nfs4_proc_read_setup,
ec06c096 10562 .read_done = nfs4_read_done,
1da177e4 10563 .write_setup = nfs4_proc_write_setup,
788e7a89 10564 .write_done = nfs4_write_done,
1da177e4 10565 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 10566 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 10567 .commit_done = nfs4_commit_done,
1da177e4 10568 .lock = nfs4_proc_lock,
e50a1c2e 10569 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 10570 .close_context = nfs4_close_context,
2b484297 10571 .open_context = nfs4_atomic_open,
011e2a7f 10572 .have_delegation = nfs4_have_delegation,
6663ee7f 10573 .alloc_client = nfs4_alloc_client,
45a52a02 10574 .init_client = nfs4_init_client,
cdb7eced 10575 .free_client = nfs4_free_client,
1179acc6
BS		 10576 .create_server = nfs4_create_server,
10577 .clone_server = nfs_clone_server,
bdab4fd5 10578 .discover_trunking = nfs4_discover_trunking,
1da177e4
LT		 10579};
10580
64c2ce8b 10581static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
98e9cb57 10582 .name = XATTR_NAME_NFSV4_ACL,
64c2ce8b
AK		 10583 .list = nfs4_xattr_list_nfs4_acl,
10584 .get = nfs4_xattr_get_nfs4_acl,
10585 .set = nfs4_xattr_set_nfs4_acl,
10586};
10587
012a211a
FL		 10588#ifdef CONFIG_NFS_V4_2
10589static const struct xattr_handler nfs4_xattr_nfs4_user_handler = {
10590 .prefix = XATTR_USER_PREFIX,
10591 .get = nfs4_xattr_get_nfs4_user,
10592 .set = nfs4_xattr_set_nfs4_user,
10593};
10594#endif
10595
64c2ce8b
AK		 10596const struct xattr_handler *nfs4_xattr_handlers[] = {
10597 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 10598#ifdef CONFIG_NFS_V4_SECURITY_LABEL
10599 &nfs4_xattr_nfs4_label_handler,
012a211a
FL		 10600#endif
10601#ifdef CONFIG_NFS_V4_2
10602 &nfs4_xattr_nfs4_user_handler,
c9bccef6 10603#endif
64c2ce8b
AK		 10604 NULL
10605};
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