projects / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
KVM: SVM: svm_set_vintr don't warn if AVIC is active but is about to be deactivated
[linux.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{
139 if (label)
140 security_release_secctx(label->label, label->len);
141}
142static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
143{
144 if (label)
145 return server->attr_bitmask;
146
147 return server->attr_bitmask_nl;
148}
149#else
150static inline struct nfs4_label *
151nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
152 struct iattr *sattr, struct nfs4_label *l)
153{ return NULL; }
154static inline void
155nfs4_label_release_security(struct nfs4_label *label)
156{ return; }
157static inline u32 *
158nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
159{ return server->attr_bitmask; }
160#endif
161
1da177e4 162/* Prevent leaks of NFSv4 errors into userland */
46f72f57 163static int nfs4_map_errors(int err)
1da177e4 164{
52567b03
TM		 165 if (err >= -1000)
166 return err;
167 switch (err) {
168 case -NFS4ERR_RESOURCE:
30005121
WAA		 169 case -NFS4ERR_LAYOUTTRYLATER:
170 case -NFS4ERR_RECALLCONFLICT:
52567b03 171 return -EREMOTEIO;
7ebb9315 172 case -NFS4ERR_WRONGSEC:
8897538e 173 case -NFS4ERR_WRONG_CRED:
7ebb9315 174 return -EPERM;
3ddeb7c5
TM		 175 case -NFS4ERR_BADOWNER:
176 case -NFS4ERR_BADNAME:
177 return -EINVAL;
fb13bfa7
TM		 178 case -NFS4ERR_SHARE_DENIED:
179 return -EACCES;
f25efd85
SD		 180 case -NFS4ERR_MINOR_VERS_MISMATCH:
181 return -EPROTONOSUPPORT;
6e3cf241
TM		 182 case -NFS4ERR_FILE_OPEN:
183 return -EBUSY;
9fff59ed
TM		 184 case -NFS4ERR_NOT_SAME:
185 return -ENOTSYNC;
52567b03 186 default:
1da177e4 187 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 188 __func__, -err);
52567b03 189 break;
1da177e4 190 }
52567b03 191 return -EIO;
1da177e4
LT		 192}
193
194/*
195 * This is our standard bitmap for GETATTR requests.
196 */
1549210f 197const u32 nfs4_fattr_bitmap[3] = {
1da177e4
LT		 198 FATTR4_WORD0_TYPE
199 | FATTR4_WORD0_CHANGE
200 | FATTR4_WORD0_SIZE
201 | FATTR4_WORD0_FSID
202 | FATTR4_WORD0_FILEID,
203 FATTR4_WORD1_MODE
204 | FATTR4_WORD1_NUMLINKS
205 | FATTR4_WORD1_OWNER
206 | FATTR4_WORD1_OWNER_GROUP
207 | FATTR4_WORD1_RAWDEV
208 | FATTR4_WORD1_SPACE_USED
209 | FATTR4_WORD1_TIME_ACCESS
210 | FATTR4_WORD1_TIME_METADATA
ea96d1ec
AS		 211 | FATTR4_WORD1_TIME_MODIFY
212 | FATTR4_WORD1_MOUNTED_ON_FILEID,
aa9c2669
DQ		 213#ifdef CONFIG_NFS_V4_SECURITY_LABEL
214 FATTR4_WORD2_SECURITY_LABEL
215#endif
1da177e4
LT		 216};
217
1549210f
TM		 218static const u32 nfs4_pnfs_open_bitmap[3] = {
219 FATTR4_WORD0_TYPE
220 | FATTR4_WORD0_CHANGE
221 | FATTR4_WORD0_SIZE
222 | FATTR4_WORD0_FSID
223 | FATTR4_WORD0_FILEID,
224 FATTR4_WORD1_MODE
225 | FATTR4_WORD1_NUMLINKS
226 | FATTR4_WORD1_OWNER
227 | FATTR4_WORD1_OWNER_GROUP
228 | FATTR4_WORD1_RAWDEV
229 | FATTR4_WORD1_SPACE_USED
230 | FATTR4_WORD1_TIME_ACCESS
231 | FATTR4_WORD1_TIME_METADATA
232 | FATTR4_WORD1_TIME_MODIFY,
233 FATTR4_WORD2_MDSTHRESHOLD
95864c91
TM		 234#ifdef CONFIG_NFS_V4_SECURITY_LABEL
235 | FATTR4_WORD2_SECURITY_LABEL
236#endif
1549210f
TM		 237};
238
e23008ec
AA		 239static const u32 nfs4_open_noattr_bitmap[3] = {
240 FATTR4_WORD0_TYPE
e23008ec
AA		 241 | FATTR4_WORD0_FILEID,
242};
243
a09df2ca 244const u32 nfs4_statfs_bitmap[3] = {
1da177e4
LT		 245 FATTR4_WORD0_FILES_AVAIL
246 | FATTR4_WORD0_FILES_FREE
247 | FATTR4_WORD0_FILES_TOTAL,
248 FATTR4_WORD1_SPACE_AVAIL
249 | FATTR4_WORD1_SPACE_FREE
250 | FATTR4_WORD1_SPACE_TOTAL
251};
252
a09df2ca 253const u32 nfs4_pathconf_bitmap[3] = {
1da177e4
LT		 254 FATTR4_WORD0_MAXLINK
255 | FATTR4_WORD0_MAXNAME,
256 0
257};
258
dae100c2 259const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
1da177e4
LT		 260 | FATTR4_WORD0_MAXREAD
261 | FATTR4_WORD0_MAXWRITE
262 | FATTR4_WORD0_LEASE_TIME,
55b6e774 263 FATTR4_WORD1_TIME_DELTA
dae100c2
FI		 264 | FATTR4_WORD1_FS_LAYOUT_TYPES,
265 FATTR4_WORD2_LAYOUT_BLKSIZE
2a92ee92 266 | FATTR4_WORD2_CLONE_BLKSIZE
7f08a335 267 | FATTR4_WORD2_CHANGE_ATTR_TYPE
b78ef845 268 | FATTR4_WORD2_XATTR_SUPPORT
1da177e4
LT		 269};
270
a09df2ca 271const u32 nfs4_fs_locations_bitmap[3] = {
c05cefcc 272 FATTR4_WORD0_CHANGE
830b8e33
MN		 273 | FATTR4_WORD0_SIZE
274 | FATTR4_WORD0_FSID
275 | FATTR4_WORD0_FILEID
276 | FATTR4_WORD0_FS_LOCATIONS,
c05cefcc 277 FATTR4_WORD1_OWNER
830b8e33
MN		 278 | FATTR4_WORD1_OWNER_GROUP
279 | FATTR4_WORD1_RAWDEV
280 | FATTR4_WORD1_SPACE_USED
281 | FATTR4_WORD1_TIME_ACCESS
282 | FATTR4_WORD1_TIME_METADATA
283 | FATTR4_WORD1_TIME_MODIFY
a09df2ca 284 | FATTR4_WORD1_MOUNTED_ON_FILEID,
830b8e33
MN		 285};
286
30846df0 287static void nfs4_bitmap_copy_adjust(__u32 *dst, const __u32 *src,
a71029b8 288 struct inode *inode, unsigned long flags)
30846df0
TM		 289{
290 unsigned long cache_validity;
291
292 memcpy(dst, src, NFS4_BITMASK_SZ*sizeof(*dst));
293 if (!inode || !nfs4_have_delegation(inode, FMODE_READ))
294 return;
295
a71029b8 296 cache_validity = READ_ONCE(NFS_I(inode)->cache_validity) | flags;
30846df0 297
a71029b8
TM		 298 /* Remove the attributes over which we have full control */
299 dst[1] &= ~FATTR4_WORD1_RAWDEV;
30846df0
TM		 300 if (!(cache_validity & NFS_INO_INVALID_SIZE))
301 dst[0] &= ~FATTR4_WORD0_SIZE;
302
303 if (!(cache_validity & NFS_INO_INVALID_CHANGE))
304 dst[0] &= ~FATTR4_WORD0_CHANGE;
30846df0 305
720869eb
TM		 306 if (!(cache_validity & NFS_INO_INVALID_MODE))
307 dst[1] &= ~FATTR4_WORD1_MODE;
a71029b8 308 if (!(cache_validity & NFS_INO_INVALID_OTHER))
720869eb 309 dst[1] &= ~(FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP);
30846df0
TM		 310}
311
bc4785cd 312static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 313 struct nfs4_readdir_arg *readdir)
314{
18fe6a23 315 unsigned int attrs = FATTR4_WORD0_FILEID | FATTR4_WORD0_TYPE;
0dbb4c67 316 __be32 *start, *p;
1da177e4 317
1da177e4 318 if (cookie > 2) {
b7ef1956 319 readdir->cookie = cookie;
1da177e4
LT		 320 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
321 return;
322 }
323
324 readdir->cookie = 0;
325 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
326 if (cookie == 2)
327 return;
328
329 /*
330 * NFSv4 servers do not return entries for '.' and '..'
331 * Therefore, we fake these entries here. We let '.'
332 * have cookie 0 and '..' have cookie 1. Note that
333 * when talking to the server, we always send cookie 0
334 * instead of 1 or 2.
335 */
2b86ce2d 336 start = p = kmap_atomic(*readdir->pages);
1da177e4
LT		 337
338 if (cookie == 0) {
339 *p++ = xdr_one; /* next */
340 *p++ = xdr_zero; /* cookie, first word */
341 *p++ = xdr_one; /* cookie, second word */
342 *p++ = xdr_one; /* entry len */
343 memcpy(p, ".\0\0\0", 4); /* entry */
344 p++;
345 *p++ = xdr_one; /* bitmap length */
18fe6a23
AS		 346 *p++ = htonl(attrs); /* bitmap */
347 *p++ = htonl(12); /* attribute buffer length */
348 *p++ = htonl(NF4DIR);
2b0143b5 349 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry)));
1da177e4
LT		 350 }
351
352 *p++ = xdr_one; /* next */
353 *p++ = xdr_zero; /* cookie, first word */
354 *p++ = xdr_two; /* cookie, second word */
355 *p++ = xdr_two; /* entry len */
356 memcpy(p, "..\0\0", 4); /* entry */
357 p++;
358 *p++ = xdr_one; /* bitmap length */
18fe6a23
AS		 359 *p++ = htonl(attrs); /* bitmap */
360 *p++ = htonl(12); /* attribute buffer length */
361 *p++ = htonl(NF4DIR);
2b0143b5 362 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry->d_parent)));
1da177e4
LT		 363
364 readdir->pgbase = (char *)p - (char *)start;
365 readdir->count -= readdir->pgbase;
2b86ce2d 366 kunmap_atomic(start);
1da177e4
LT		 367}
368
26d36301
TM		 369static void nfs4_test_and_free_stateid(struct nfs_server *server,
370 nfs4_stateid *stateid,
a52458b4 371 const struct cred *cred)
26d36301
TM		 372{
373 const struct nfs4_minor_version_ops *ops = server->nfs_client->cl_mvops;
374
375 ops->test_and_free_expired(server, stateid, cred);
376}
377
378static void __nfs4_free_revoked_stateid(struct nfs_server *server,
379 nfs4_stateid *stateid,
a52458b4 380 const struct cred *cred)
26d36301
TM		 381{
382 stateid->type = NFS4_REVOKED_STATEID_TYPE;
383 nfs4_test_and_free_stateid(server, stateid, cred);
384}
385
386static void nfs4_free_revoked_stateid(struct nfs_server *server,
387 const nfs4_stateid *stateid,
a52458b4 388 const struct cred *cred)
26d36301
TM		 389{
390 nfs4_stateid tmp;
391
392 nfs4_stateid_copy(&tmp, stateid);
393 __nfs4_free_revoked_stateid(server, &tmp, cred);
394}
395
8478eaa1
N		 396static long nfs4_update_delay(long *timeout)
397{
398 long ret;
399 if (!timeout)
400 return NFS4_POLL_RETRY_MAX;
401 if (*timeout <= 0)
402 *timeout = NFS4_POLL_RETRY_MIN;
403 if (*timeout > NFS4_POLL_RETRY_MAX)
404 *timeout = NFS4_POLL_RETRY_MAX;
405 ret = *timeout;
406 *timeout <<= 1;
407 return ret;
408}
409
0688e64b 410static int nfs4_delay_killable(long *timeout)
65de872e 411{
65de872e
TM		 412 might_sleep();
413
8478eaa1
N		 414 freezable_schedule_timeout_killable_unsafe(
415 nfs4_update_delay(timeout));
0688e64b
TM		 416 if (!__fatal_signal_pending(current))
417 return 0;
418 return -EINTR;
419}
420
421static int nfs4_delay_interruptible(long *timeout)
422{
423 might_sleep();
424
59679d99 425 freezable_schedule_timeout_interruptible_unsafe(nfs4_update_delay(timeout));
0688e64b
TM		 426 if (!signal_pending(current))
427 return 0;
428 return __fatal_signal_pending(current) ? -EINTR :-ERESTARTSYS;
429}
430
431static int nfs4_delay(long *timeout, bool interruptible)
432{
433 if (interruptible)
434 return nfs4_delay_interruptible(timeout);
435 return nfs4_delay_killable(timeout);
65de872e
TM		 436}
437
50c80007
TM		 438static const nfs4_stateid *
439nfs4_recoverable_stateid(const nfs4_stateid *stateid)
440{
441 if (!stateid)
442 return NULL;
443 switch (stateid->type) {
444 case NFS4_OPEN_STATEID_TYPE:
445 case NFS4_LOCK_STATEID_TYPE:
446 case NFS4_DELEGATION_STATEID_TYPE:
447 return stateid;
448 default:
449 break;
450 }
451 return NULL;
452}
453
65de872e
TM		 454/* This is the error handling routine for processes that are allowed
455 * to sleep.
456 */
b3c2aa07
TM		 457static int nfs4_do_handle_exception(struct nfs_server *server,
458 int errorcode, struct nfs4_exception *exception)
65de872e
TM		 459{
460 struct nfs_client *clp = server->nfs_client;
9e33bed5 461 struct nfs4_state *state = exception->state;
50c80007 462 const nfs4_stateid *stateid;
3114ea7a 463 struct inode *inode = exception->inode;
65de872e
TM		 464 int ret = errorcode;
465
b3c2aa07
TM		 466 exception->delay = 0;
467 exception->recovering = 0;
65de872e 468 exception->retry = 0;
272289a3 469
50c80007 470 stateid = nfs4_recoverable_stateid(exception->stateid);
272289a3 471 if (stateid == NULL && state != NULL)
50c80007 472 stateid = nfs4_recoverable_stateid(&state->stateid);
272289a3 473
65de872e
TM		 474 switch(errorcode) {
475 case 0:
476 return 0;
cf61eb26
TM		 477 case -NFS4ERR_BADHANDLE:
478 case -ESTALE:
479 if (inode != NULL && S_ISREG(inode->i_mode))
480 pnfs_destroy_layout(NFS_I(inode));
481 break;
5ba12443
TM		 482 case -NFS4ERR_DELEG_REVOKED:
483 case -NFS4ERR_ADMIN_REVOKED:
272289a3 484 case -NFS4ERR_EXPIRED:
5ba12443 485 case -NFS4ERR_BAD_STATEID:
fefa1a81 486 case -NFS4ERR_PARTNER_NO_AUTH:
272289a3
TM		 487 if (inode != NULL && stateid != NULL) {
488 nfs_inode_find_state_and_recover(inode,
489 stateid);
490 goto wait_on_recovery;
491 }
df561f66 492 fallthrough;
272289a3 493 case -NFS4ERR_OPENMODE:
8487c479
TM		 494 if (inode) {
495 int err;
496
497 err = nfs_async_inode_return_delegation(inode,
498 stateid);
499 if (err == 0)
500 goto wait_on_recovery;
501 if (stateid != NULL && stateid->type == NFS4_DELEGATION_STATEID_TYPE) {
502 exception->retry = 1;
503 break;
504 }
505 }
3114ea7a
TM		 506 if (state == NULL)
507 break;
5d422301
TM		 508 ret = nfs4_schedule_stateid_recovery(server, state);
509 if (ret < 0)
510 break;
3114ea7a 511 goto wait_on_recovery;
65de872e 512 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 513 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 514 nfs4_schedule_lease_recovery(clp);
515 goto wait_on_recovery;
519ae255
CL		 516 case -NFS4ERR_MOVED:
517 ret = nfs4_schedule_migration_recovery(server);
518 if (ret < 0)
519 break;
520 goto wait_on_recovery;
8ef2f8d4
CL		 521 case -NFS4ERR_LEASE_MOVED:
522 nfs4_schedule_lease_moved_recovery(clp);
523 goto wait_on_recovery;
03391693 524#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 525 case -NFS4ERR_BADSESSION:
526 case -NFS4ERR_BADSLOT:
527 case -NFS4ERR_BAD_HIGH_SLOT:
528 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
529 case -NFS4ERR_DEADSESSION:
530 case -NFS4ERR_SEQ_FALSE_RETRY:
531 case -NFS4ERR_SEQ_MISORDERED:
5c441544 532 /* Handled in nfs41_sequence_process() */
399f11c3 533 goto wait_on_recovery;
03391693 534#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 535 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 536 if (exception->timeout > HZ) {
537 /* We have retried a decent amount, time to
538 * fail
539 */
540 ret = -EBUSY;
541 break;
542 }
df561f66 543 fallthrough;
65de872e 544 case -NFS4ERR_DELAY:
2598ed34 545 nfs_inc_server_stats(server, NFSIOS_DELAY);
df561f66 546 fallthrough;
2598ed34 547 case -NFS4ERR_GRACE:
e85d7ee4 548 case -NFS4ERR_LAYOUTTRYLATER:
183d9e7b 549 case -NFS4ERR_RECALLCONFLICT:
b3c2aa07
TM		 550 exception->delay = 1;
551 return 0;
552
a8a4ae3a 553 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 554 case -NFS4ERR_OLD_STATEID:
555 exception->retry = 1;
b064eca2
TM		 556 break;
557 case -NFS4ERR_BADOWNER:
558 /* The following works around a Linux server bug! */
559 case -NFS4ERR_BADNAME:
560 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
561 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
562 exception->retry = 1;
563 printk(KERN_WARNING "NFS: v4 server %s "
564 "does not accept raw "
565 "uid/gids. "
566 "Reenabling the idmapper.\n",
567 server->nfs_client->cl_hostname);
568 }
65de872e
TM		 569 }
570 /* We failed to handle the error */
571 return nfs4_map_errors(ret);
0400a6b0 572wait_on_recovery:
b3c2aa07
TM		 573 exception->recovering = 1;
574 return 0;
575}
576
577/* This is the error handling routine for processes that are allowed
578 * to sleep.
579 */
580int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
581{
582 struct nfs_client *clp = server->nfs_client;
583 int ret;
584
585 ret = nfs4_do_handle_exception(server, errorcode, exception);
586 if (exception->delay) {
0688e64b
TM		 587 ret = nfs4_delay(&exception->timeout,
588 exception->interruptible);
b3c2aa07
TM		 589 goto out_retry;
590 }
591 if (exception->recovering) {
dfe1fe75
TM		 592 if (exception->task_is_privileged)
593 return -EDEADLOCK;
b3c2aa07
TM		 594 ret = nfs4_wait_clnt_recover(clp);
595 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
596 return -EIO;
597 goto out_retry;
598 }
599 return ret;
600out_retry:
a2c0b9e2
TM		 601 if (ret == 0)
602 exception->retry = 1;
603 return ret;
65de872e
TM		 604}
605
037fc980
TM		 606static int
607nfs4_async_handle_exception(struct rpc_task *task, struct nfs_server *server,
608 int errorcode, struct nfs4_exception *exception)
609{
610 struct nfs_client *clp = server->nfs_client;
611 int ret;
612
613 ret = nfs4_do_handle_exception(server, errorcode, exception);
614 if (exception->delay) {
615 rpc_delay(task, nfs4_update_delay(&exception->timeout));
616 goto out_retry;
617 }
618 if (exception->recovering) {
dfe1fe75
TM		 619 if (exception->task_is_privileged)
620 return -EDEADLOCK;
037fc980
TM		 621 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
622 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
623 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
624 goto out_retry;
625 }
519ae255 626 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
037fc980
TM		 627 ret = -EIO;
628 return ret;
629out_retry:
0f90be13 630 if (ret == 0) {
a2c0b9e2 631 exception->retry = 1;
0f90be13
BB		 632 /*
633 * For NFS4ERR_MOVED, the client transport will need to
634 * be recomputed after migration recovery has completed.
635 */
636 if (errorcode == -NFS4ERR_MOVED)
637 rpc_task_release_transport(task);
638 }
a2c0b9e2 639 return ret;
65de872e
TM		 640}
641
0f913a57 642int
037fc980
TM		 643nfs4_async_handle_error(struct rpc_task *task, struct nfs_server *server,
644 struct nfs4_state *state, long *timeout)
645{
646 struct nfs4_exception exception = {
647 .state = state,
648 };
649
650 if (task->tk_status >= 0)
651 return 0;
652 if (timeout)
653 exception.timeout = *timeout;
654 task->tk_status = nfs4_async_handle_exception(task, server,
655 task->tk_status,
656 &exception);
657 if (exception.delay && timeout)
658 *timeout = exception.timeout;
659 if (exception.retry)
660 return -EAGAIN;
661 return 0;
662}
663
a5250def
WAA		 664/*
665 * Return 'true' if 'clp' is using an rpc_client that is integrity protected
666 * or 'false' otherwise.
667 */
668static bool _nfs4_is_integrity_protected(struct nfs_client *clp)
669{
670 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor;
eeea5361 671 return (flavor == RPC_AUTH_GSS_KRB5I) || (flavor == RPC_AUTH_GSS_KRB5P);
a5250def 672}
65de872e 673
452e9352 674static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 675{
1da177e4
LT		 676 spin_lock(&clp->cl_lock);
677 if (time_before(clp->cl_last_renewal,timestamp))
678 clp->cl_last_renewal = timestamp;
679 spin_unlock(&clp->cl_lock);
680}
681
452e9352
TM		 682static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
683{
be824167
TM		 684 struct nfs_client *clp = server->nfs_client;
685
686 if (!nfs4_has_session(clp))
687 do_renew_lease(clp, timestamp);
452e9352
TM		 688}
689
2a3eb2b9
CL		 690struct nfs4_call_sync_data {
691 const struct nfs_server *seq_server;
692 struct nfs4_sequence_args *seq_args;
693 struct nfs4_sequence_res *seq_res;
694};
695
be3a5d23 696void nfs4_init_sequence(struct nfs4_sequence_args *args,
fba83f34
AS		 697 struct nfs4_sequence_res *res, int cache_reply,
698 int privileged)
a9c92d6b
CL		 699{
700 args->sa_slot = NULL;
701 args->sa_cache_this = cache_reply;
fba83f34 702 args->sa_privileged = privileged;
a9c92d6b
CL		 703
704 res->sr_slot = NULL;
705}
706
2e80dbe7 707static void nfs40_sequence_free_slot(struct nfs4_sequence_res *res)
3bd2384a
CL		 708{
709 struct nfs4_slot *slot = res->sr_slot;
710 struct nfs4_slot_table *tbl;
711
3bd2384a
CL		 712 tbl = slot->table;
713 spin_lock(&tbl->slot_tbl_lock);
714 if (!nfs41_wake_and_assign_slot(tbl, slot))
715 nfs4_free_slot(tbl, slot);
716 spin_unlock(&tbl->slot_tbl_lock);
717
718 res->sr_slot = NULL;
2e80dbe7
TM		 719}
720
721static int nfs40_sequence_done(struct rpc_task *task,
722 struct nfs4_sequence_res *res)
723{
724 if (res->sr_slot != NULL)
725 nfs40_sequence_free_slot(res);
3bd2384a
CL		 726 return 1;
727}
728
cccef3b9
AA		 729#if defined(CONFIG_NFS_V4_1)
730
3be0f80b 731static void nfs41_release_slot(struct nfs4_slot *slot)
13615871 732{
e3725ec0 733 struct nfs4_session *session;
13615871 734 struct nfs4_slot_table *tbl;
c10e4498 735 bool send_new_highest_used_slotid = false;
13615871 736
3be0f80b
TM		 737 if (!slot)
738 return;
a13ce7c6 739 tbl = slot->table;
e3725ec0 740 session = tbl->session;
ea028ac9 741
07e8dcbd
TM		 742 /* Bump the slot sequence number */
743 if (slot->seq_done)
744 slot->seq_nr++;
745 slot->seq_done = 0;
746
35dc1d74 747 spin_lock(&tbl->slot_tbl_lock);
c10e4498
TM		 748 /* Be nice to the server: try to ensure that the last transmitted
749 * value for highest_user_slotid <= target_highest_slotid
750 */
751 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
752 send_new_highest_used_slotid = true;
753
a13ce7c6 754 if (nfs41_wake_and_assign_slot(tbl, slot)) {
b75ad4cd
TM		 755 send_new_highest_used_slotid = false;
756 goto out_unlock;
757 }
a13ce7c6 758 nfs4_free_slot(tbl, slot);
c10e4498
TM		 759
760 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
761 send_new_highest_used_slotid = false;
b75ad4cd 762out_unlock:
35dc1d74 763 spin_unlock(&tbl->slot_tbl_lock);
c10e4498 764 if (send_new_highest_used_slotid)
3f10a6af 765 nfs41_notify_server(session->clp);
045d2a6d
TM		 766 if (waitqueue_active(&tbl->slot_waitq))
767 wake_up_all(&tbl->slot_waitq);
13615871
AA		 768}
769
3be0f80b
TM		 770static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
771{
772 nfs41_release_slot(res->sr_slot);
773 res->sr_slot = NULL;
774}
775
3453d570
TM		 776static void nfs4_slot_sequence_record_sent(struct nfs4_slot *slot,
777 u32 seqnr)
778{
779 if ((s32)(seqnr - slot->seq_nr_highest_sent) > 0)
780 slot->seq_nr_highest_sent = seqnr;
781}
782static void nfs4_slot_sequence_acked(struct nfs4_slot *slot,
783 u32 seqnr)
784{
785 slot->seq_nr_highest_sent = seqnr;
786 slot->seq_nr_last_acked = seqnr;
787}
788
913fadc5
AS		 789static void nfs4_probe_sequence(struct nfs_client *client, const struct cred *cred,
790 struct nfs4_slot *slot)
791{
792 struct rpc_task *task = _nfs41_proc_sequence(client, cred, slot, true);
793 if (!IS_ERR(task))
794 rpc_put_task_async(task);
795}
796
2e80dbe7
TM		 797static int nfs41_sequence_process(struct rpc_task *task,
798 struct nfs4_sequence_res *res)
b0df806c 799{
e3725ec0 800 struct nfs4_session *session;
a13ce7c6 801 struct nfs4_slot *slot = res->sr_slot;
14516c3a 802 struct nfs_client *clp;
5c441544 803 int status;
85563073 804 int ret = 1;
b0df806c 805
a13ce7c6
TM		 806 if (slot == NULL)
807 goto out_noaction;
468f8613 808 /* don't increment the sequence number if the task wasn't sent */
c71c46f0 809 if (!RPC_WAS_SENT(task) || slot->seq_done)
b0df806c
AA		 810 goto out;
811
e3725ec0 812 session = slot->table->session;
913fadc5 813 clp = session->clp;
933602e3 814
2f92ae34 815 trace_nfs4_sequence_done(session, res);
5c441544
TM		 816
817 status = res->sr_status;
818 if (task->tk_status == -NFS4ERR_DEADSESSION)
819 status = -NFS4ERR_DEADSESSION;
820
691daf3b 821 /* Check the SEQUENCE operation status */
5c441544 822 switch (status) {
14516c3a 823 case 0:
3453d570
TM		 824 /* Mark this sequence number as having been acked */
825 nfs4_slot_sequence_acked(slot, slot->seq_nr);
b0df806c 826 /* Update the slot's sequence and clientid lease timer */
07e8dcbd 827 slot->seq_done = 1;
8e63b6a8 828 do_renew_lease(clp, res->sr_timestamp);
0629e370 829 /* Check sequence flags */
0a014a44
TM		 830 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags,
831 !!slot->privileged);
464ee9f9 832 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a 833 break;
ac20d163
TM		 834 case 1:
835 /*
836 * sr_status remains 1 if an RPC level error occurred.
837 * The server may or may not have processed the sequence
838 * operation..
ac20d163 839 */
3453d570
TM		 840 nfs4_slot_sequence_record_sent(slot, slot->seq_nr);
841 slot->seq_done = 1;
ac20d163 842 goto out;
14516c3a
TM		 843 case -NFS4ERR_DELAY:
844 /* The server detected a resend of the RPC call and
845 * returned NFS4ERR_DELAY as per Section 2.10.6.2
846 * of RFC5661.
847 */
df2fabff 848 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 849 __func__,
df2fabff 850 slot->slot_nr,
933602e3 851 slot->seq_nr);
3453d570 852 nfs4_slot_sequence_acked(slot, slot->seq_nr);
14516c3a 853 goto out_retry;
f9312a54
TM		 854 case -NFS4ERR_RETRY_UNCACHED_REP:
855 case -NFS4ERR_SEQ_FALSE_RETRY:
856 /*
857 * The server thinks we tried to replay a request.
858 * Retry the call after bumping the sequence ID.
859 */
3453d570 860 nfs4_slot_sequence_acked(slot, slot->seq_nr);
f9312a54 861 goto retry_new_seq;
85563073
TM		 862 case -NFS4ERR_BADSLOT:
863 /*
864 * The slot id we used was probably retired. Try again
865 * using a different slot id.
866 */
99589100 867 if (slot->slot_nr < slot->table->target_highest_slotid)
3be0f80b 868 goto session_recover;
e8794440
TM		 869 goto retry_nowait;
870 case -NFS4ERR_SEQ_MISORDERED:
3453d570 871 nfs4_slot_sequence_record_sent(slot, slot->seq_nr);
ac20d163 872 /*
3453d570
TM		 873 * Were one or more calls using this slot interrupted?
874 * If the server never received the request, then our
913fadc5
AS		 875 * transmitted slot sequence number may be too high. However,
876 * if the server did receive the request then it might
877 * accidentally give us a reply with a mismatched operation.
878 * We can sort this out by sending a lone sequence operation
879 * to the server on the same slot.
e8794440 880 */
3453d570
TM		 881 if ((s32)(slot->seq_nr - slot->seq_nr_last_acked) > 1) {
882 slot->seq_nr--;
913fadc5
AS		 883 if (task->tk_msg.rpc_proc != &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE]) {
884 nfs4_probe_sequence(clp, task->tk_msg.rpc_cred, slot);
885 res->sr_slot = NULL;
886 }
8e63b6a8
TM		 887 goto retry_nowait;
888 }
3453d570
TM		 889 /*
890 * RFC5661:
891 * A retry might be sent while the original request is
892 * still in progress on the replier. The replier SHOULD
893 * deal with the issue by returning NFS4ERR_DELAY as the
894 * reply to SEQUENCE or CB_SEQUENCE operation, but
895 * implementations MAY return NFS4ERR_SEQ_MISORDERED.
896 *
897 * Restart the search after a delay.
898 */
899 slot->seq_nr = slot->seq_nr_highest_sent;
900 goto out_retry;
5c441544
TM		 901 case -NFS4ERR_BADSESSION:
902 case -NFS4ERR_DEADSESSION:
903 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
904 goto session_recover;
14516c3a
TM		 905 default:
906 /* Just update the slot sequence no. */
07e8dcbd 907 slot->seq_done = 1;
b0df806c
AA		 908 }
909out:
910 /* The session may be reset by one of the error handlers. */
911 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
a13ce7c6 912out_noaction:
85563073 913 return ret;
3be0f80b 914session_recover:
5c441544
TM		 915 nfs4_schedule_session_recovery(session, status);
916 dprintk("%s ERROR: %d Reset session\n", __func__, status);
917 nfs41_sequence_free_slot(res);
918 goto out;
3be0f80b
TM		 919retry_new_seq:
920 ++slot->seq_nr;
e8794440
TM		 921retry_nowait:
922 if (rpc_restart_call_prepare(task)) {
2e80dbe7 923 nfs41_sequence_free_slot(res);
e8794440
TM		 924 task->tk_status = 0;
925 ret = 0;
926 }
927 goto out;
14516c3a 928out_retry:
d05dd4e9 929 if (!rpc_restart_call(task))
14516c3a
TM		 930 goto out;
931 rpc_delay(task, NFS4_POLL_RETRY_MAX);
932 return 0;
b0df806c 933}
2e80dbe7
TM		 934
935int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
936{
937 if (!nfs41_sequence_process(task, res))
938 return 0;
939 if (res->sr_slot != NULL)
940 nfs41_sequence_free_slot(res);
941 return 1;
942
943}
f9c96fcc 944EXPORT_SYMBOL_GPL(nfs41_sequence_done);
b0df806c 945
2e80dbe7
TM		 946static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res)
947{
948 if (res->sr_slot == NULL)
949 return 1;
950 if (res->sr_slot->table->session != NULL)
951 return nfs41_sequence_process(task, res);
952 return nfs40_sequence_done(task, res);
953}
954
955static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res)
956{
957 if (res->sr_slot != NULL) {
958 if (res->sr_slot->table->session != NULL)
959 nfs41_sequence_free_slot(res);
960 else
961 nfs40_sequence_free_slot(res);
962 }
963}
964
2c4b131d 965int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
df896455 966{
e3725ec0 967 if (res->sr_slot == NULL)
14516c3a 968 return 1;
3bd2384a
CL		 969 if (!res->sr_slot->table->session)
970 return nfs40_sequence_done(task, res);
14516c3a 971 return nfs41_sequence_done(task, res);
df896455 972}
2c4b131d 973EXPORT_SYMBOL_GPL(nfs4_sequence_done);
df896455 974
ce5039c1
AA		 975static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
976{
2a3eb2b9 977 struct nfs4_call_sync_data *data = calldata;
ce5039c1 978
035168ab
TM		 979 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
980
7981c8a6
AS		 981 nfs4_setup_sequence(data->seq_server->nfs_client,
982 data->seq_args, data->seq_res, task);
ce5039c1
AA		 983}
984
69ab40c4
AA		 985static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
986{
2a3eb2b9 987 struct nfs4_call_sync_data *data = calldata;
69ab40c4 988
14516c3a 989 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 990}
991
17280175 992static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 993 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 994 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 995};
996
3bd2384a
CL		 997#else /* !CONFIG_NFS_V4_1 */
998
2e80dbe7
TM		 999static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res)
1000{
1001 return nfs40_sequence_done(task, res);
1002}
1003
1004static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res)
1005{
1006 if (res->sr_slot != NULL)
1007 nfs40_sequence_free_slot(res);
1008}
1009
2c4b131d
PT		 1010int nfs4_sequence_done(struct rpc_task *task,
1011 struct nfs4_sequence_res *res)
9915ea7e 1012{
3bd2384a 1013 return nfs40_sequence_done(task, res);
9915ea7e 1014}
2c4b131d 1015EXPORT_SYMBOL_GPL(nfs4_sequence_done);
3bd2384a
CL		 1016
1017#endif /* !CONFIG_NFS_V4_1 */
9915ea7e 1018
c1dffe0b
TM		 1019static void nfs41_sequence_res_init(struct nfs4_sequence_res *res)
1020{
1021 res->sr_timestamp = jiffies;
1022 res->sr_status_flags = 0;
1023 res->sr_status = 1;
1024}
1025
3be0f80b
TM		 1026static
1027void nfs4_sequence_attach_slot(struct nfs4_sequence_args *args,
1028 struct nfs4_sequence_res *res,
1029 struct nfs4_slot *slot)
1030{
1031 if (!slot)
1032 return;
1033 slot->privileged = args->sa_privileged ? 1 : 0;
1034 args->sa_slot = slot;
1035
1036 res->sr_slot = slot;
3be0f80b
TM		 1037}
1038
1039int nfs4_setup_sequence(struct nfs_client *client,
7981c8a6
AS		 1040 struct nfs4_sequence_args *args,
1041 struct nfs4_sequence_res *res,
1042 struct rpc_task *task)
1043{
7981c8a6 1044 struct nfs4_session *session = nfs4_get_session(client);
76ee0354 1045 struct nfs4_slot_table *tbl = client->cl_slot_tbl;
3d35808b 1046 struct nfs4_slot *slot;
7981c8a6 1047
9dd9107f
AS		 1048 /* slot already allocated? */
1049 if (res->sr_slot != NULL)
1050 goto out_start;
1051
6b2e6856 1052 if (session)
76ee0354 1053 tbl = &session->fc_slot_table;
76ee0354 1054
3453d570
TM		 1055 spin_lock(&tbl->slot_tbl_lock);
1056 /* The state manager will wait until the slot table is empty */
1057 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
1058 goto out_sleep;
1059
1060 slot = nfs4_alloc_slot(tbl);
1061 if (IS_ERR(slot)) {
3453d570 1062 if (slot == ERR_PTR(-ENOMEM))
6b2e6856 1063 goto out_sleep_timeout;
3453d570 1064 goto out_sleep;
3d35808b 1065 }
3453d570 1066 spin_unlock(&tbl->slot_tbl_lock);
3d35808b 1067
3be0f80b 1068 nfs4_sequence_attach_slot(args, res, slot);
3d35808b 1069
ad05cc0f 1070 trace_nfs4_setup_sequence(session, args);
9dd9107f 1071out_start:
c1dffe0b 1072 nfs41_sequence_res_init(res);
9dd9107f
AS		 1073 rpc_call_start(task);
1074 return 0;
6b2e6856
TM		 1075out_sleep_timeout:
1076 /* Try again in 1/4 second */
1077 if (args->sa_privileged)
1078 rpc_sleep_on_priority_timeout(&tbl->slot_tbl_waitq, task,
1079 jiffies + (HZ >> 2), RPC_PRIORITY_PRIVILEGED);
1080 else
1081 rpc_sleep_on_timeout(&tbl->slot_tbl_waitq, task,
1082 NULL, jiffies + (HZ >> 2));
1083 spin_unlock(&tbl->slot_tbl_lock);
1084 return -EAGAIN;
0dcee8bb
AS		 1085out_sleep:
1086 if (args->sa_privileged)
1087 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
8357a9b6 1088 RPC_PRIORITY_PRIVILEGED);
0dcee8bb
AS		 1089 else
1090 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
1091 spin_unlock(&tbl->slot_tbl_lock);
1092 return -EAGAIN;
7981c8a6
AS		 1093}
1094EXPORT_SYMBOL_GPL(nfs4_setup_sequence);
1095
9915ea7e
CL		 1096static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
1097{
1098 struct nfs4_call_sync_data *data = calldata;
42e1cca7 1099 nfs4_setup_sequence(data->seq_server->nfs_client,
9915ea7e
CL		 1100 data->seq_args, data->seq_res, task);
1101}
1102
1103static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
1104{
1105 struct nfs4_call_sync_data *data = calldata;
1106 nfs4_sequence_done(task, data->seq_res);
1107}
1108
1109static const struct rpc_call_ops nfs40_call_sync_ops = {
1110 .rpc_call_prepare = nfs40_call_sync_prepare,
1111 .rpc_call_done = nfs40_call_sync_done,
1112};
1113
48c05854
AS		 1114static int nfs4_call_sync_custom(struct rpc_task_setup *task_setup)
1115{
1116 int ret;
1117 struct rpc_task *task;
1118
1119 task = rpc_run_task(task_setup);
1120 if (IS_ERR(task))
1121 return PTR_ERR(task);
1122
1123 ret = task->tk_status;
1124 rpc_put_task(task);
1125 return ret;
1126}
1127
c74dfe97
TM		 1128static int nfs4_do_call_sync(struct rpc_clnt *clnt,
1129 struct nfs_server *server,
1130 struct rpc_message *msg,
1131 struct nfs4_sequence_args *args,
1132 struct nfs4_sequence_res *res,
1133 unsigned short task_flags)
ce5039c1 1134{
9915ea7e 1135 struct nfs_client *clp = server->nfs_client;
2a3eb2b9 1136 struct nfs4_call_sync_data data = {
035168ab 1137 .seq_server = server,
ce5039c1
AA		 1138 .seq_args = args,
1139 .seq_res = res,
ce5039c1
AA		 1140 };
1141 struct rpc_task_setup task_setup = {
7c513058 1142 .rpc_client = clnt,
ce5039c1 1143 .rpc_message = msg,
9915ea7e 1144 .callback_ops = clp->cl_mvops->call_sync_ops,
c74dfe97
TM		 1145 .callback_data = &data,
1146 .flags = task_flags,
ce5039c1
AA		 1147 };
1148
48c05854 1149 return nfs4_call_sync_custom(&task_setup);
ce5039c1
AA		 1150}
1151
c74dfe97
TM		 1152static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
1153 struct nfs_server *server,
1154 struct rpc_message *msg,
1155 struct nfs4_sequence_args *args,
1156 struct nfs4_sequence_res *res)
1157{
85e39fee
OK		 1158 unsigned short task_flags = 0;
1159
1160 if (server->nfs_client->cl_minorversion)
1161 task_flags = RPC_TASK_MOVEABLE;
1162 return nfs4_do_call_sync(clnt, server, msg, args, res, task_flags);
c74dfe97
TM		 1163}
1164
1165
7c513058
BS		 1166int nfs4_call_sync(struct rpc_clnt *clnt,
1167 struct nfs_server *server,
e73b83f2
BS		 1168 struct rpc_message *msg,
1169 struct nfs4_sequence_args *args,
1170 struct nfs4_sequence_res *res,
1171 int cache_reply)
1172{
fba83f34 1173 nfs4_init_sequence(args, res, cache_reply, 0);
9915ea7e 1174 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
e73b83f2 1175}
cccef3b9 1176
3c591175
TM		 1177static void
1178nfs4_inc_nlink_locked(struct inode *inode)
1179{
82eae5a4
TM		 1180 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE |
1181 NFS_INO_INVALID_CTIME |
1182 NFS_INO_INVALID_NLINK);
3c591175
TM		 1183 inc_nlink(inode);
1184}
1185
1301e421
TM		 1186static void
1187nfs4_inc_nlink(struct inode *inode)
1188{
1189 spin_lock(&inode->i_lock);
1190 nfs4_inc_nlink_locked(inode);
1191 spin_unlock(&inode->i_lock);
1192}
1193
3c591175
TM		 1194static void
1195nfs4_dec_nlink_locked(struct inode *inode)
1196{
82eae5a4
TM		 1197 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE |
1198 NFS_INO_INVALID_CTIME |
1199 NFS_INO_INVALID_NLINK);
3c591175
TM		 1200 drop_nlink(inode);
1201}
1202
1203static void
1b523ca9
FL		 1204nfs4_update_changeattr_locked(struct inode *inode,
1205 struct nfs4_change_info *cinfo,
5636ec4e 1206 unsigned long timestamp, unsigned long cache_validity)
1da177e4 1207{
1b523ca9 1208 struct nfs_inode *nfsi = NFS_I(inode);
6f9be83d 1209 u64 change_attr = inode_peek_iversion_raw(inode);
1da177e4 1210
b6f80a2e 1211 cache_validity |= NFS_INO_INVALID_CTIME | NFS_INO_INVALID_MTIME;
20cf7d4e
TM		 1212 if (S_ISDIR(inode->i_mode))
1213 cache_validity |= NFS_INO_INVALID_DATA;
1b523ca9 1214
6f9be83d
TM		 1215 switch (NFS_SERVER(inode)->change_attr_type) {
1216 case NFS4_CHANGE_TYPE_IS_UNDEFINED:
20cf7d4e 1217 if (cinfo->after == change_attr)
6f9be83d
TM		 1218 goto out;
1219 break;
1220 default:
1221 if ((s64)(change_attr - cinfo->after) >= 0)
1222 goto out;
1223 }
1224
20cf7d4e
TM		 1225 inode_set_iversion_raw(inode, cinfo->after);
1226 if (!cinfo->atomic || cinfo->before != change_attr) {
1227 if (S_ISDIR(inode->i_mode))
1b523ca9 1228 nfs_force_lookup_revalidate(inode);
1b523ca9 1229
20cf7d4e
TM		 1230 if (!NFS_PROTO(inode)->have_delegation(inode, FMODE_READ))
1231 cache_validity |=
1232 NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL |
1233 NFS_INO_INVALID_SIZE | NFS_INO_INVALID_OTHER |
1234 NFS_INO_INVALID_BLOCKS | NFS_INO_INVALID_NLINK |
1235 NFS_INO_INVALID_MODE | NFS_INO_INVALID_XATTR |
1236 NFS_INO_REVAL_PAGECACHE;
1237 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
e603a4c1 1238 }
20cf7d4e 1239 nfsi->attrtimeo_timestamp = jiffies;
d3129ef6 1240 nfsi->read_cache_jiffies = timestamp;
3235b403 1241 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
c8d07159 1242 nfsi->cache_validity &= ~NFS_INO_INVALID_CHANGE;
6f9be83d
TM		 1243out:
1244 nfs_set_cache_invalid(inode, cache_validity);
3c591175
TM		 1245}
1246
1b523ca9
FL		 1247void
1248nfs4_update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo,
5636ec4e 1249 unsigned long timestamp, unsigned long cache_validity)
3c591175
TM		 1250{
1251 spin_lock(&dir->i_lock);
1b523ca9 1252 nfs4_update_changeattr_locked(dir, cinfo, timestamp, cache_validity);
38478b24 1253 spin_unlock(&dir->i_lock);
1da177e4
LT		 1254}
1255
8fd1ab74
TM		 1256struct nfs4_open_createattrs {
1257 struct nfs4_label *label;
1258 struct iattr *sattr;
1259 const __u32 verf[2];
1260};
1261
49f9a0fa
TM		 1262static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
1263 int err, struct nfs4_exception *exception)
1264{
1265 if (err != -EINVAL)
1266 return false;
1267 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1268 return false;
1269 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
1270 exception->retry = 1;
1271 return true;
1272}
1273
1bf85d8c
TM		 1274static fmode_t _nfs4_ctx_to_accessmode(const struct nfs_open_context *ctx)
1275{
1276 return ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
1277}
1278
1279static fmode_t _nfs4_ctx_to_openmode(const struct nfs_open_context *ctx)
1280{
1281 fmode_t ret = ctx->mode & (FMODE_READ|FMODE_WRITE);
1282
1283 return (ctx->mode & FMODE_EXEC) ? FMODE_READ | ret : ret;
1284}
1285
6ae37339
TM		 1286static u32
1287nfs4_map_atomic_open_share(struct nfs_server *server,
1288 fmode_t fmode, int openflags)
1289{
1290 u32 res = 0;
1291
1292 switch (fmode & (FMODE_READ | FMODE_WRITE)) {
1293 case FMODE_READ:
1294 res = NFS4_SHARE_ACCESS_READ;
1295 break;
1296 case FMODE_WRITE:
1297 res = NFS4_SHARE_ACCESS_WRITE;
1298 break;
1299 case FMODE_READ|FMODE_WRITE:
1300 res = NFS4_SHARE_ACCESS_BOTH;
1301 }
1302 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1303 goto out;
1304 /* Want no delegation if we're using O_DIRECT */
1305 if (openflags & O_DIRECT)
1306 res |= NFS4_SHARE_WANT_NO_DELEG;
1307out:
1308 return res;
1309}
1310
49f9a0fa
TM		 1311static enum open_claim_type4
1312nfs4_map_atomic_open_claim(struct nfs_server *server,
1313 enum open_claim_type4 claim)
1314{
1315 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
1316 return claim;
1317 switch (claim) {
1318 default:
1319 return claim;
1320 case NFS4_OPEN_CLAIM_FH:
1321 return NFS4_OPEN_CLAIM_NULL;
1322 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1323 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
1324 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1325 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
1326 }
1327}
2ced46c2
TM		 1328
1329static void nfs4_init_opendata_res(struct nfs4_opendata *p)
1330{
1331 p->o_res.f_attr = &p->f_attr;
1775fd3e 1332 p->o_res.f_label = p->f_label;
c1d51931
TM		 1333 p->o_res.seqid = p->o_arg.seqid;
1334 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 1335 p->o_res.server = p->o_arg.server;
5f657530 1336 p->o_res.access_request = p->o_arg.access;
2ced46c2 1337 nfs_fattr_init(&p->f_attr);
6926afd1 1338 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 1339}
1340
82a2c1b7 1341static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 1342 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8fd1ab74 1343 const struct nfs4_open_createattrs *c,
4a1c0893 1344 enum open_claim_type4 claim,
8535b2be 1345 gfp_t gfp_mask)
e56e0b78 1346{
82a2c1b7 1347 struct dentry *parent = dget_parent(dentry);
2b0143b5 1348 struct inode *dir = d_inode(parent);
e56e0b78 1349 struct nfs_server *server = NFS_SERVER(dir);
63f5f796 1350 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
8fd1ab74 1351 struct nfs4_label *label = (c != NULL) ? c->label : NULL;
e56e0b78
TM		 1352 struct nfs4_opendata *p;
1353
8535b2be 1354 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 1355 if (p == NULL)
1356 goto err;
14c43f76
DQ		 1357
1358 p->f_label = nfs4_label_alloc(server, gfp_mask);
1359 if (IS_ERR(p->f_label))
1360 goto err_free_p;
1361
a49c2691
KM		 1362 p->a_label = nfs4_label_alloc(server, gfp_mask);
1363 if (IS_ERR(p->a_label))
1364 goto err_free_f;
1365
63f5f796
TM		 1366 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
1367 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask);
badc76dd 1368 if (IS_ERR(p->o_arg.seqid))
14c43f76 1369 goto err_free_label;
82a2c1b7
AV		 1370 nfs_sb_active(dentry->d_sb);
1371 p->dentry = dget(dentry);
e56e0b78
TM		 1372 p->dir = parent;
1373 p->owner = sp;
1374 atomic_inc(&sp->so_count);
dc0b027d
TM		 1375 p->o_arg.open_flags = flags;
1376 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
536585cc 1377 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
6ae37339
TM		 1378 p->o_arg.share_access = nfs4_map_atomic_open_share(server,
1379 fmode, flags);
90910519
BC		 1380 if (flags & O_CREAT) {
1381 p->o_arg.umask = current_umask();
1382 p->o_arg.label = nfs4_label_copy(p->a_label, label);
1383 if (c->sattr != NULL && c->sattr->ia_valid != 0) {
1384 p->o_arg.u.attrs = &p->attrs;
1385 memcpy(&p->attrs, c->sattr, sizeof(p->attrs));
1386
1387 memcpy(p->o_arg.u.verifier.data, c->verf,
1388 sizeof(p->o_arg.u.verifier.data));
1389 }
1390 }
ae2bb032
WAA		 1391 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
1392 * will return permission denied for all bits until close */
1393 if (!(flags & O_EXCL)) {
1394 /* ask server to check for all possible rights as results
1395 * are cached */
536585cc
TM		 1396 switch (p->o_arg.claim) {
1397 default:
1398 break;
1399 case NFS4_OPEN_CLAIM_NULL:
1400 case NFS4_OPEN_CLAIM_FH:
1401 p->o_arg.access = NFS4_ACCESS_READ |
1402 NFS4_ACCESS_MODIFY |
1403 NFS4_ACCESS_EXTEND |
1404 NFS4_ACCESS_EXECUTE;
72832a24
FL		 1405#ifdef CONFIG_NFS_V4_2
1406 if (server->caps & NFS_CAP_XATTR)
1407 p->o_arg.access |= NFS4_ACCESS_XAREAD |
1408 NFS4_ACCESS_XAWRITE |
1409 NFS4_ACCESS_XALIST;
1410#endif
536585cc 1411 }
ae2bb032 1412 }
7539bbab 1413 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 1414 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1415 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 1416 p->o_arg.name = &dentry->d_name;
e56e0b78 1417 p->o_arg.server = server;
aa9c2669 1418 p->o_arg.bitmask = nfs4_bitmask(server, label);
1549210f 1419 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
49f9a0fa 1420 switch (p->o_arg.claim) {
4a1c0893
TM		 1421 case NFS4_OPEN_CLAIM_NULL:
1422 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1423 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1424 p->o_arg.fh = NFS_FH(dir);
1425 break;
1426 case NFS4_OPEN_CLAIM_PREVIOUS:
1427 case NFS4_OPEN_CLAIM_FH:
1428 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1429 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
2b0143b5 1430 p->o_arg.fh = NFS_FH(d_inode(dentry));
4a1c0893 1431 }
cdd4e68b
TM		 1432 p->c_arg.fh = &p->o_res.fh;
1433 p->c_arg.stateid = &p->o_res.stateid;
1434 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 1435 nfs4_init_opendata_res(p);
c6d00e63 1436 kref_init(&p->kref);
e56e0b78 1437 return p;
14c43f76
DQ		 1438
1439err_free_label:
a49c2691
KM		 1440 nfs4_label_free(p->a_label);
1441err_free_f:
14c43f76
DQ		 1442 nfs4_label_free(p->f_label);
1443err_free_p:
e56e0b78
TM		 1444 kfree(p);
1445err:
1446 dput(parent);
1447 return NULL;
1448}
1449
c6d00e63 1450static void nfs4_opendata_free(struct kref *kref)
e56e0b78 1451{
c6d00e63
TM		 1452 struct nfs4_opendata *p = container_of(kref,
1453 struct nfs4_opendata, kref);
82a2c1b7 1454 struct super_block *sb = p->dentry->d_sb;
c6d00e63 1455
30ae2412 1456 nfs4_lgopen_release(p->lgp);
c6d00e63 1457 nfs_free_seqid(p->o_arg.seqid);
2e80dbe7 1458 nfs4_sequence_free_slot(&p->o_res.seq_res);
aac00a8d
TM		 1459 if (p->state != NULL)
1460 nfs4_put_open_state(p->state);
c6d00e63 1461 nfs4_put_state_owner(p->owner);
14c43f76 1462
a49c2691 1463 nfs4_label_free(p->a_label);
14c43f76
DQ		 1464 nfs4_label_free(p->f_label);
1465
c6d00e63 1466 dput(p->dir);
82a2c1b7
AV		 1467 dput(p->dentry);
1468 nfs_sb_deactive(sb);
6926afd1 1469 nfs_fattr_free_names(&p->f_attr);
e911b815 1470 kfree(p->f_attr.mdsthreshold);
c6d00e63
TM		 1471 kfree(p);
1472}
1473
1474static void nfs4_opendata_put(struct nfs4_opendata *p)
1475{
1476 if (p != NULL)
1477 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 1478}
1479
24311f88
TM		 1480static bool nfs4_mode_match_open_stateid(struct nfs4_state *state,
1481 fmode_t fmode)
1482{
1483 switch(fmode & (FMODE_READ|FMODE_WRITE)) {
1484 case FMODE_READ|FMODE_WRITE:
1485 return state->n_rdwr != 0;
1486 case FMODE_WRITE:
1487 return state->n_wronly != 0;
1488 case FMODE_READ:
1489 return state->n_rdonly != 0;
1490 }
1491 WARN_ON_ONCE(1);
1492 return false;
1493}
1494
be189f7e
TM		 1495static int can_open_cached(struct nfs4_state *state, fmode_t mode,
1496 int open_mode, enum open_claim_type4 claim)
6ee41268
TM		 1497{
1498 int ret = 0;
dc0b027d 1499
536e43d1 1500 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d 1501 goto out;
be189f7e
TM		 1502 switch (claim) {
1503 case NFS4_OPEN_CLAIM_NULL:
1504 case NFS4_OPEN_CLAIM_FH:
1505 goto out;
1506 default:
1507 break;
1508 }
dc0b027d 1509 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 1510 case FMODE_READ:
88069f77
TM		 1511 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1512 && state->n_rdonly != 0;
6ee41268
TM		 1513 break;
1514 case FMODE_WRITE:
88069f77
TM		 1515 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1516 && state->n_wronly != 0;
6ee41268
TM		 1517 break;
1518 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 1519 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1520 && state->n_rdwr != 0;
6ee41268 1521 }
dc0b027d 1522out:
6ee41268
TM		 1523 return ret;
1524}
1525
2a606188
TM		 1526static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode,
1527 enum open_claim_type4 claim)
aac00a8d 1528{
652f89f6
TM		 1529 if (delegation == NULL)
1530 return 0;
dc0b027d 1531 if ((delegation->type & fmode) != fmode)
aac00a8d 1532 return 0;
2a606188
TM		 1533 switch (claim) {
1534 case NFS4_OPEN_CLAIM_NULL:
1535 case NFS4_OPEN_CLAIM_FH:
1536 break;
1537 case NFS4_OPEN_CLAIM_PREVIOUS:
1538 if (!test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
1539 break;
df561f66 1540 fallthrough;
2a606188
TM		 1541 default:
1542 return 0;
1543 }
b7391f44 1544 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 1545 return 1;
1546}
1547
dc0b027d 1548static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 1549{
dc0b027d 1550 switch (fmode) {
e7616923
TM		 1551 case FMODE_WRITE:
1552 state->n_wronly++;
1553 break;
1554 case FMODE_READ:
1555 state->n_rdonly++;
1556 break;
1557 case FMODE_READ|FMODE_WRITE:
1558 state->n_rdwr++;
1559 }
dc0b027d 1560 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 1561}
1562
8a64c4ef
TM		 1563#ifdef CONFIG_NFS_V4_1
1564static bool nfs_open_stateid_recover_openmode(struct nfs4_state *state)
1565{
1566 if (state->n_rdonly && !test_bit(NFS_O_RDONLY_STATE, &state->flags))
1567 return true;
1568 if (state->n_wronly && !test_bit(NFS_O_WRONLY_STATE, &state->flags))
1569 return true;
1570 if (state->n_rdwr && !test_bit(NFS_O_RDWR_STATE, &state->flags))
1571 return true;
1572 return false;
1573}
1574#endif /* CONFIG_NFS_V4_1 */
1575
c9399f21
TM		 1576static void nfs_state_log_update_open_stateid(struct nfs4_state *state)
1577{
1578 if (test_and_clear_bit(NFS_STATE_CHANGE_WAIT, &state->flags))
1579 wake_up_all(&state->waitq);
1580}
1581
4f14c194
TM		 1582static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
1583{
1584 struct nfs_client *clp = state->owner->so_server->nfs_client;
1585 bool need_recover = false;
1586
1587 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly)
1588 need_recover = true;
1589 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly)
1590 need_recover = true;
1591 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr)
1592 need_recover = true;
1593 if (need_recover)
1594 nfs4_state_mark_reclaim_nograce(clp, state);
1595}
1596
c9399f21
TM		 1597/*
1598 * Check for whether or not the caller may update the open stateid
1599 * to the value passed in by stateid.
1600 *
1601 * Note: This function relies heavily on the server implementing
1602 * RFC7530 Section 9.1.4.2, and RFC5661 Section 8.2.2
1603 * correctly.
1604 * i.e. The stateid seqids have to be initialised to 1, and
1605 * are then incremented on every state transition.
1606 */
b4868b44 1607static bool nfs_stateid_is_sequential(struct nfs4_state *state,
c9399f21 1608 const nfs4_stateid *stateid)
e999e80e 1609{
b4868b44
BC		 1610 if (test_bit(NFS_OPEN_STATE, &state->flags)) {
1611 /* The common case - we're updating to a new sequence number */
1612 if (nfs4_stateid_match_other(stateid, &state->open_stateid) &&
1613 nfs4_stateid_is_next(&state->open_stateid, stateid)) {
1614 return true;
1615 }
1616 } else {
1617 /* This is the first OPEN in this generation */
c9399f21 1618 if (stateid->seqid == cpu_to_be32(1))
b4868b44 1619 return true;
c9399f21 1620 }
e999e80e
TM		 1621 return false;
1622}
1623
f95549cf
TM		 1624static void nfs_resync_open_stateid_locked(struct nfs4_state *state)
1625{
3c38cbe2
TM		 1626 if (!(state->n_wronly || state->n_rdonly || state->n_rdwr))
1627 return;
f95549cf
TM		 1628 if (state->n_wronly)
1629 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1630 if (state->n_rdonly)
1631 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1632 if (state->n_rdwr)
1633 set_bit(NFS_O_RDWR_STATE, &state->flags);
3c38cbe2 1634 set_bit(NFS_OPEN_STATE, &state->flags);
f95549cf
TM		 1635}
1636
226056c5
TM		 1637static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
1638 nfs4_stateid *stateid, fmode_t fmode)
003707c7 1639{
226056c5
TM		 1640 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1641 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1642 case FMODE_WRITE:
1643 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1644 break;
1645 case FMODE_READ:
1646 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1647 break;
1648 case 0:
1649 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1650 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1651 clear_bit(NFS_OPEN_STATE, &state->flags);
1652 }
1653 if (stateid == NULL)
1654 return;
3e7dfb16
TM		 1655 /* Handle OPEN+OPEN_DOWNGRADE races */
1656 if (nfs4_stateid_match_other(stateid, &state->open_stateid) &&
1657 !nfs4_stateid_is_newer(stateid, &state->open_stateid)) {
f95549cf 1658 nfs_resync_open_stateid_locked(state);
c9399f21 1659 goto out;
f95549cf 1660 }
003707c7 1661 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 1662 nfs4_stateid_copy(&state->stateid, stateid);
1663 nfs4_stateid_copy(&state->open_stateid, stateid);
ad9e02dc 1664 trace_nfs4_open_stateid_update(state->inode, stateid, 0);
c9399f21
TM		 1665out:
1666 nfs_state_log_update_open_stateid(state);
226056c5
TM		 1667}
1668
4a1e2feb
TM		 1669static void nfs_clear_open_stateid(struct nfs4_state *state,
1670 nfs4_stateid *arg_stateid,
1671 nfs4_stateid *stateid, fmode_t fmode)
226056c5
TM		 1672{
1673 write_seqlock(&state->seqlock);
3e7dfb16
TM		 1674 /* Ignore, if the CLOSE argment doesn't match the current stateid */
1675 if (nfs4_state_match_open_stateid_other(state, arg_stateid))
1676 nfs_clear_open_stateid_locked(state, stateid, fmode);
226056c5 1677 write_sequnlock(&state->seqlock);
4f14c194
TM		 1678 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1679 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
226056c5
TM		 1680}
1681
1393d961 1682static void nfs_set_open_stateid_locked(struct nfs4_state *state,
c9399f21 1683 const nfs4_stateid *stateid, nfs4_stateid *freeme)
e9acf210
TM		 1684 __must_hold(&state->owner->so_lock)
1685 __must_hold(&state->seqlock)
1686 __must_hold(RCU)
1687
003707c7 1688{
c9399f21
TM		 1689 DEFINE_WAIT(wait);
1690 int status = 0;
1691 for (;;) {
1692
b4868b44 1693 if (nfs_stateid_is_sequential(state, stateid))
003707c7 1694 break;
b4868b44 1695
c9399f21 1696 if (status)
003707c7 1697 break;
c9399f21
TM		 1698 /* Rely on seqids for serialisation with NFSv4.0 */
1699 if (!nfs4_has_session(NFS_SERVER(state->inode)->nfs_client))
1700 break;
1701
b4868b44 1702 set_bit(NFS_STATE_CHANGE_WAIT, &state->flags);
c9399f21
TM		 1703 prepare_to_wait(&state->waitq, &wait, TASK_KILLABLE);
1704 /*
1705 * Ensure we process the state changes in the same order
1706 * in which the server processed them by delaying the
1707 * update of the stateid until we are in sequence.
1708 */
1709 write_sequnlock(&state->seqlock);
1710 spin_unlock(&state->owner->so_lock);
1711 rcu_read_unlock();
ad9e02dc 1712 trace_nfs4_open_stateid_update_wait(state->inode, stateid, 0);
b4868b44 1713
bb002388 1714 if (!fatal_signal_pending(current)) {
c9399f21
TM		 1715 if (schedule_timeout(5*HZ) == 0)
1716 status = -EAGAIN;
1717 else
1718 status = 0;
1719 } else
1720 status = -EINTR;
1721 finish_wait(&state->waitq, &wait);
1722 rcu_read_lock();
1723 spin_lock(&state->owner->so_lock);
1724 write_seqlock(&state->seqlock);
003707c7 1725 }
c9399f21 1726
e1fff5df
TM		 1727 if (test_bit(NFS_OPEN_STATE, &state->flags) &&
1728 !nfs4_stateid_match_other(stateid, &state->open_stateid)) {
c9399f21
TM		 1729 nfs4_stateid_copy(freeme, &state->open_stateid);
1730 nfs_test_and_clear_all_open_stateid(state);
1731 }
1732
e999e80e
TM		 1733 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1734 nfs4_stateid_copy(&state->stateid, stateid);
1735 nfs4_stateid_copy(&state->open_stateid, stateid);
ad9e02dc 1736 trace_nfs4_open_stateid_update(state->inode, stateid, status);
c9399f21 1737 nfs_state_log_update_open_stateid(state);
003707c7
TM		 1738}
1739
c9399f21 1740static void nfs_state_set_open_stateid(struct nfs4_state *state,
1393d961 1741 const nfs4_stateid *open_stateid,
1393d961
TM		 1742 fmode_t fmode,
1743 nfs4_stateid *freeme)
1da177e4 1744{
8bda4e4c
TM		 1745 /*
1746 * Protect the call to nfs4_state_set_mode_locked and
1747 * serialise the stateid update
1748 */
1749 write_seqlock(&state->seqlock);
c9399f21
TM		 1750 nfs_set_open_stateid_locked(state, open_stateid, freeme);
1751 switch (fmode) {
1752 case FMODE_READ:
1753 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1754 break;
1755 case FMODE_WRITE:
1756 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1757 break;
1758 case FMODE_READ|FMODE_WRITE:
1759 set_bit(NFS_O_RDWR_STATE, &state->flags);
003707c7 1760 }
c9399f21
TM		 1761 set_bit(NFS_OPEN_STATE, &state->flags);
1762 write_sequnlock(&state->seqlock);
1763}
1764
27a30cf6
TM		 1765static void nfs_state_clear_open_state_flags(struct nfs4_state *state)
1766{
1767 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1768 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1769 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1770 clear_bit(NFS_OPEN_STATE, &state->flags);
1771}
1772
c9399f21
TM		 1773static void nfs_state_set_delegation(struct nfs4_state *state,
1774 const nfs4_stateid *deleg_stateid,
1775 fmode_t fmode)
1776{
1777 /*
1778 * Protect the call to nfs4_state_set_mode_locked and
1779 * serialise the stateid update
1780 */
1781 write_seqlock(&state->seqlock);
1782 nfs4_stateid_copy(&state->stateid, deleg_stateid);
1783 set_bit(NFS_DELEGATED_STATE, &state->flags);
8bda4e4c 1784 write_sequnlock(&state->seqlock);
1da177e4
LT		 1785}
1786
9f0c5124
TM		 1787static void nfs_state_clear_delegation(struct nfs4_state *state)
1788{
1789 write_seqlock(&state->seqlock);
1790 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1791 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1792 write_sequnlock(&state->seqlock);
1793}
1794
ec4b0925 1795int update_open_stateid(struct nfs4_state *state,
1393d961
TM		 1796 const nfs4_stateid *open_stateid,
1797 const nfs4_stateid *delegation,
1798 fmode_t fmode)
34310430 1799{
1393d961
TM		 1800 struct nfs_server *server = NFS_SERVER(state->inode);
1801 struct nfs_client *clp = server->nfs_client;
34310430
TM		 1802 struct nfs_inode *nfsi = NFS_I(state->inode);
1803 struct nfs_delegation *deleg_cur;
83aa3e0f 1804 nfs4_stateid freeme = { };
34310430
TM		 1805 int ret = 0;
1806
dc0b027d 1807 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1808
1809 rcu_read_lock();
c9399f21
TM		 1810 spin_lock(&state->owner->so_lock);
1811 if (open_stateid != NULL) {
1812 nfs_state_set_open_stateid(state, open_stateid, fmode, &freeme);
1813 ret = 1;
1814 }
1815
333ac786 1816 deleg_cur = nfs4_get_valid_delegation(state->inode);
34310430
TM		 1817 if (deleg_cur == NULL)
1818 goto no_delegation;
1819
1820 spin_lock(&deleg_cur->lock);
17f26b12 1821 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
d25be546 1822 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1823 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1824 goto no_delegation_unlock;
1825
1826 if (delegation == NULL)
1827 delegation = &deleg_cur->stateid;
333ac786 1828 else if (!nfs4_stateid_match_other(&deleg_cur->stateid, delegation))
34310430
TM		 1829 goto no_delegation_unlock;
1830
b7391f44 1831 nfs_mark_delegation_referenced(deleg_cur);
c9399f21 1832 nfs_state_set_delegation(state, &deleg_cur->stateid, fmode);
34310430
TM		 1833 ret = 1;
1834no_delegation_unlock:
1835 spin_unlock(&deleg_cur->lock);
1836no_delegation:
c9399f21
TM		 1837 if (ret)
1838 update_open_stateflags(state, fmode);
1839 spin_unlock(&state->owner->so_lock);
34310430
TM		 1840 rcu_read_unlock();
1841
4f14c194 1842 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1393d961
TM		 1843 nfs4_schedule_state_manager(clp);
1844 if (freeme.type != 0)
1845 nfs4_test_and_free_stateid(server, &freeme,
1846 state->owner->so_cred);
34310430
TM		 1847
1848 return ret;
1849}
1850
39071e6f
TM		 1851static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp,
1852 const nfs4_stateid *stateid)
1853{
1854 struct nfs4_state *state = lsp->ls_state;
1855 bool ret = false;
1856
1857 spin_lock(&state->state_lock);
1858 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid))
1859 goto out_noupdate;
1860 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid))
1861 goto out_noupdate;
1862 nfs4_stateid_copy(&lsp->ls_stateid, stateid);
1863 ret = true;
1864out_noupdate:
1865 spin_unlock(&state->state_lock);
1866 return ret;
1867}
34310430 1868
dc0b027d 1869static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1870{
1871 struct nfs_delegation *delegation;
1872
f5086242 1873 fmode &= FMODE_READ|FMODE_WRITE;
aac00a8d 1874 rcu_read_lock();
40e6aa10 1875 delegation = nfs4_get_valid_delegation(inode);
dc0b027d 1876 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1877 rcu_read_unlock();
1878 return;
1879 }
1880 rcu_read_unlock();
57ec14c5 1881 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1882}
1883
6ee41268 1884static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1885{
1886 struct nfs4_state *state = opendata->state;
aac00a8d 1887 struct nfs_delegation *delegation;
f448badd 1888 int open_mode = opendata->o_arg.open_flags;
dc0b027d 1889 fmode_t fmode = opendata->o_arg.fmode;
2a606188 1890 enum open_claim_type4 claim = opendata->o_arg.claim;
aac00a8d
TM		 1891 nfs4_stateid stateid;
1892 int ret = -EAGAIN;
1893
aac00a8d 1894 for (;;) {
61beef75 1895 spin_lock(&state->owner->so_lock);
be189f7e 1896 if (can_open_cached(state, fmode, open_mode, claim)) {
61beef75 1897 update_open_stateflags(state, fmode);
6ee41268 1898 spin_unlock(&state->owner->so_lock);
61beef75 1899 goto out_return_state;
6ee41268 1900 }
61beef75 1901 spin_unlock(&state->owner->so_lock);
34310430 1902 rcu_read_lock();
be3df3dd 1903 delegation = nfs4_get_valid_delegation(state->inode);
2a606188 1904 if (!can_open_delegated(delegation, fmode, claim)) {
34310430 1905 rcu_read_unlock();
aac00a8d 1906 break;
34310430 1907 }
aac00a8d 1908 /* Save the delegation */
f597c537 1909 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1910 rcu_read_unlock();
fa332941 1911 nfs_release_seqid(opendata->o_arg.seqid);
bdeca1b7
TM		 1912 if (!opendata->is_recover) {
1913 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1914 if (ret != 0)
1915 goto out;
1916 }
aac00a8d 1917 ret = -EAGAIN;
34310430
TM		 1918
1919 /* Try to update the stateid using the delegation */
dc0b027d 1920 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1921 goto out_return_state;
aac00a8d 1922 }
aac00a8d
TM		 1923out:
1924 return ERR_PTR(ret);
1925out_return_state:
ace9fad4 1926 refcount_inc(&state->count);
aac00a8d
TM		 1927 return state;
1928}
1929
e23008ec
AA		 1930static void
1931nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1932{
1933 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1934 struct nfs_delegation *delegation;
1935 int delegation_flags = 0;
1936
1937 rcu_read_lock();
1938 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1939 if (delegation)
1940 delegation_flags = delegation->flags;
1941 rcu_read_unlock();
72d79ff8
TM		 1942 switch (data->o_arg.claim) {
1943 default:
1944 break;
1945 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1946 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
e23008ec
AA		 1947 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1948 "returning a delegation for "
1949 "OPEN(CLAIM_DELEGATE_CUR)\n",
1950 clp->cl_hostname);
72d79ff8
TM		 1951 return;
1952 }
1953 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
e23008ec 1954 nfs_inode_set_delegation(state->inode,
35156bff
TM		 1955 data->owner->so_cred,
1956 data->o_res.delegation_type,
1957 &data->o_res.delegation,
1958 data->o_res.pagemod_limit);
e23008ec
AA		 1959 else
1960 nfs_inode_reclaim_delegation(state->inode,
35156bff
TM		 1961 data->owner->so_cred,
1962 data->o_res.delegation_type,
1963 &data->o_res.delegation,
1964 data->o_res.pagemod_limit);
8b199e58
JL		 1965
1966 if (data->o_res.do_recall)
1967 nfs_async_inode_return_delegation(state->inode,
1968 &data->o_res.delegation);
e23008ec
AA		 1969}
1970
1971/*
1972 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1973 * and update the nfs4_state.
1974 */
1975static struct nfs4_state *
1976_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1977{
1978 struct inode *inode = data->state->inode;
1979 struct nfs4_state *state = data->state;
1980 int ret;
1981
d2bfda2e 1982 if (!data->rpc_done) {
37a8484a
AS		 1983 if (data->rpc_status)
1984 return ERR_PTR(data->rpc_status);
d2bfda2e
WAA		 1985 /* cached opens have already been processed */
1986 goto update;
e23008ec
AA		 1987 }
1988
e23008ec
AA		 1989 ret = nfs_refresh_inode(inode, &data->f_attr);
1990 if (ret)
37a8484a 1991 return ERR_PTR(ret);
e23008ec
AA		 1992
1993 if (data->o_res.delegation_type != 0)
1994 nfs4_opendata_check_deleg(data, state);
d2bfda2e 1995update:
e3c8dc76
TM		 1996 if (!update_open_stateid(state, &data->o_res.stateid,
1997 NULL, data->o_arg.fmode))
1998 return ERR_PTR(-EAGAIN);
ace9fad4 1999 refcount_inc(&state->count);
e23008ec
AA		 2000
2001 return state;
e23008ec
AA		 2002}
2003
4e2fcac7
TM		 2004static struct inode *
2005nfs4_opendata_get_inode(struct nfs4_opendata *data)
2006{
2007 struct inode *inode;
2008
2009 switch (data->o_arg.claim) {
2010 case NFS4_OPEN_CLAIM_NULL:
2011 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
2012 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
2013 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
2014 return ERR_PTR(-EAGAIN);
2015 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh,
2016 &data->f_attr, data->f_label);
2017 break;
2018 default:
2019 inode = d_inode(data->dentry);
2020 ihold(inode);
2021 nfs_refresh_inode(inode, &data->f_attr);
2022 }
2023 return inode;
2024}
2025
e23008ec 2026static struct nfs4_state *
75e8c48b 2027nfs4_opendata_find_nfs4_state(struct nfs4_opendata *data)
24ac23ab 2028{
75e8c48b 2029 struct nfs4_state *state;
24ac23ab 2030 struct inode *inode;
75e8c48b
TM		 2031
2032 inode = nfs4_opendata_get_inode(data);
2033 if (IS_ERR(inode))
2034 return ERR_CAST(inode);
2035 if (data->state != NULL && data->state->inode == inode) {
2036 state = data->state;
ace9fad4 2037 refcount_inc(&state->count);
75e8c48b
TM		 2038 } else
2039 state = nfs4_get_open_state(inode, data->owner);
2040 iput(inode);
2041 if (state == NULL)
2042 state = ERR_PTR(-ENOMEM);
2043 return state;
2044}
2045
2046static struct nfs4_state *
2047_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
2048{
2049 struct nfs4_state *state;
24ac23ab 2050
aac00a8d 2051 if (!data->rpc_done) {
6ee41268 2052 state = nfs4_try_open_cached(data);
9759b0fb 2053 trace_nfs4_cached_open(data->state);
aac00a8d
TM		 2054 goto out;
2055 }
2056
75e8c48b
TM		 2057 state = nfs4_opendata_find_nfs4_state(data);
2058 if (IS_ERR(state))
2059 goto out;
2060
e23008ec
AA		 2061 if (data->o_res.delegation_type != 0)
2062 nfs4_opendata_check_deleg(data, state);
e3c8dc76
TM		 2063 if (!update_open_stateid(state, &data->o_res.stateid,
2064 NULL, data->o_arg.fmode)) {
2065 nfs4_put_open_state(state);
2066 state = ERR_PTR(-EAGAIN);
2067 }
aac00a8d 2068out:
7aa262b5 2069 nfs_release_seqid(data->o_arg.seqid);
24ac23ab
TM		 2070 return state;
2071}
2072
e23008ec
AA		 2073static struct nfs4_state *
2074nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
2075{
2e80dbe7
TM		 2076 struct nfs4_state *ret;
2077
e23008ec 2078 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
2e80dbe7
TM		 2079 ret =_nfs4_opendata_reclaim_to_nfs4_state(data);
2080 else
2081 ret = _nfs4_opendata_to_nfs4_state(data);
2082 nfs4_sequence_free_slot(&data->o_res.seq_res);
2083 return ret;
e23008ec
AA		 2084}
2085
0de43976
TM		 2086static struct nfs_open_context *
2087nfs4_state_find_open_context_mode(struct nfs4_state *state, fmode_t mode)
864472e9
TM		 2088{
2089 struct nfs_inode *nfsi = NFS_I(state->inode);
2090 struct nfs_open_context *ctx;
2091
0de43976
TM		 2092 rcu_read_lock();
2093 list_for_each_entry_rcu(ctx, &nfsi->open_files, list) {
864472e9
TM		 2094 if (ctx->state != state)
2095 continue;
0de43976
TM		 2096 if ((ctx->mode & mode) != mode)
2097 continue;
2098 if (!get_nfs_open_context(ctx))
2099 continue;
2100 rcu_read_unlock();
864472e9
TM		 2101 return ctx;
2102 }
0de43976 2103 rcu_read_unlock();
864472e9
TM		 2104 return ERR_PTR(-ENOENT);
2105}
2106
0de43976
TM		 2107static struct nfs_open_context *
2108nfs4_state_find_open_context(struct nfs4_state *state)
2109{
2110 struct nfs_open_context *ctx;
2111
2112 ctx = nfs4_state_find_open_context_mode(state, FMODE_READ|FMODE_WRITE);
2113 if (!IS_ERR(ctx))
2114 return ctx;
2115 ctx = nfs4_state_find_open_context_mode(state, FMODE_WRITE);
2116 if (!IS_ERR(ctx))
2117 return ctx;
2118 return nfs4_state_find_open_context_mode(state, FMODE_READ);
2119}
2120
4a1c0893
TM		 2121static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
2122 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 2123{
2124 struct nfs4_opendata *opendata;
2125
4a1c0893 2126 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
8fd1ab74 2127 NULL, claim, GFP_NOFS);
6f220ed5
TM		 2128 if (opendata == NULL)
2129 return ERR_PTR(-ENOMEM);
2130 opendata->state = state;
ace9fad4 2131 refcount_inc(&state->count);
6f220ed5
TM		 2132 return opendata;
2133}
2134
24311f88
TM		 2135static int nfs4_open_recover_helper(struct nfs4_opendata *opendata,
2136 fmode_t fmode)
864472e9 2137{
2ced46c2 2138 struct nfs4_state *newstate;
864472e9
TM		 2139 int ret;
2140
24311f88 2141 if (!nfs4_mode_match_open_stateid(opendata->state, fmode))
39f897fd 2142 return 0;
dc0b027d
TM		 2143 opendata->o_arg.open_flags = 0;
2144 opendata->o_arg.fmode = fmode;
be36e185
TM		 2145 opendata->o_arg.share_access = nfs4_map_atomic_open_share(
2146 NFS_SB(opendata->dentry->d_sb),
2147 fmode, 0);
2ced46c2
TM		 2148 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
2149 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
2150 nfs4_init_opendata_res(opendata);
b257957e 2151 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 2152 if (ret != 0)
2153 return ret;
2ced46c2 2154 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 2155 if (IS_ERR(newstate))
2156 return PTR_ERR(newstate);
24311f88
TM		 2157 if (newstate != opendata->state)
2158 ret = -ESTALE;
643168c2 2159 nfs4_close_state(newstate, fmode);
24311f88 2160 return ret;
864472e9
TM		 2161}
2162
2163static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
2164{
864472e9
TM		 2165 int ret;
2166
2167 /* memory barrier prior to reading state->n_* */
2168 smp_rmb();
24311f88
TM		 2169 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
2170 if (ret != 0)
2171 return ret;
2172 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE);
2173 if (ret != 0)
2174 return ret;
2175 ret = nfs4_open_recover_helper(opendata, FMODE_READ);
2176 if (ret != 0)
2177 return ret;
1ac7e2fd
TM		 2178 /*
2179 * We may have performed cached opens for all three recoveries.
2180 * Check if we need to update the current stateid.
2181 */
2182 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 2183 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 2184 write_seqlock(&state->seqlock);
1ac7e2fd 2185 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 2186 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 2187 write_sequnlock(&state->seqlock);
1ac7e2fd 2188 }
864472e9
TM		 2189 return 0;
2190}
2191
1da177e4
LT		 2192/*
2193 * OPEN_RECLAIM:
2194 * reclaim state on the server after a reboot.
1da177e4 2195 */
539cd03a 2196static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 2197{
1ac7e2fd 2198 struct nfs_delegation *delegation;
864472e9 2199 struct nfs4_opendata *opendata;
dc0b027d 2200 fmode_t delegation_type = 0;
1da177e4
LT		 2201 int status;
2202
4a1c0893
TM		 2203 opendata = nfs4_open_recoverdata_alloc(ctx, state,
2204 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 2205 if (IS_ERR(opendata))
2206 return PTR_ERR(opendata);
1ac7e2fd
TM		 2207 rcu_read_lock();
2208 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 2209 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 2210 delegation_type = delegation->type;
1ac7e2fd 2211 rcu_read_unlock();
864472e9
TM		 2212 opendata->o_arg.u.delegation_type = delegation_type;
2213 status = nfs4_open_recover(opendata, state);
c6d00e63 2214 nfs4_opendata_put(opendata);
1da177e4
LT		 2215 return status;
2216}
2217
539cd03a 2218static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 2219{
2220 struct nfs_server *server = NFS_SERVER(state->inode);
2221 struct nfs4_exception exception = { };
2222 int err;
2223 do {
539cd03a 2224 err = _nfs4_do_open_reclaim(ctx, state);
42113a75 2225 trace_nfs4_open_reclaim(ctx, 0, err);
49f9a0fa
TM		 2226 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2227 continue;
168667c4 2228 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 2229 break;
2230 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 2231 } while (exception.retry);
2232 return err;
2233}
2234
864472e9
TM		 2235static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
2236{
2237 struct nfs_open_context *ctx;
2238 int ret;
2239
2240 ctx = nfs4_state_find_open_context(state);
2241 if (IS_ERR(ctx))
91876b13 2242 return -EAGAIN;
27a30cf6
TM		 2243 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2244 nfs_state_clear_open_state_flags(state);
539cd03a 2245 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 2246 put_nfs_open_context(ctx);
2247 return ret;
2248}
2249
dce2630c 2250static 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 2251{
be76b5b6
TM		 2252 switch (err) {
2253 default:
2254 printk(KERN_ERR "NFS: %s: unhandled error "
2255 "%d.\n", __func__, err);
ffb81717 2256 fallthrough;
be76b5b6
TM		 2257 case 0:
2258 case -ENOENT:
8eee52af 2259 case -EAGAIN:
be76b5b6 2260 case -ESTALE:
67e7b52d 2261 case -ETIMEDOUT:
be76b5b6
TM		 2262 break;
2263 case -NFS4ERR_BADSESSION:
2264 case -NFS4ERR_BADSLOT:
2265 case -NFS4ERR_BAD_HIGH_SLOT:
2266 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
2267 case -NFS4ERR_DEADSESSION:
be76b5b6
TM		 2268 return -EAGAIN;
2269 case -NFS4ERR_STALE_CLIENTID:
2270 case -NFS4ERR_STALE_STATEID:
be76b5b6
TM		 2271 /* Don't recall a delegation if it was lost */
2272 nfs4_schedule_lease_recovery(server->nfs_client);
2273 return -EAGAIN;
352297b9
CL		 2274 case -NFS4ERR_MOVED:
2275 nfs4_schedule_migration_recovery(server);
2276 return -EAGAIN;
8ef2f8d4
CL		 2277 case -NFS4ERR_LEASE_MOVED:
2278 nfs4_schedule_lease_moved_recovery(server->nfs_client);
2279 return -EAGAIN;
be76b5b6
TM		 2280 case -NFS4ERR_DELEG_REVOKED:
2281 case -NFS4ERR_ADMIN_REVOKED:
404ea356 2282 case -NFS4ERR_EXPIRED:
be76b5b6 2283 case -NFS4ERR_BAD_STATEID:
db4f2e63 2284 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 2285 nfs_inode_find_state_and_recover(state->inode,
2286 stateid);
2287 nfs4_schedule_stateid_recovery(server, state);
869f9dfa 2288 return -EAGAIN;
be76b5b6
TM		 2289 case -NFS4ERR_DELAY:
2290 case -NFS4ERR_GRACE:
be76b5b6
TM		 2291 ssleep(1);
2292 return -EAGAIN;
db4f2e63
TM		 2293 case -ENOMEM:
2294 case -NFS4ERR_DENIED:
dce2630c
N		 2295 if (fl) {
2296 struct nfs4_lock_state *lsp = fl->fl_u.nfs4_fl.owner;
2297 if (lsp)
2298 set_bit(NFS_LOCK_LOST, &lsp->ls_flags);
2299 }
db4f2e63 2300 return 0;
be76b5b6 2301 }
1da177e4
LT		 2302 return err;
2303}
2304
24311f88 2305int nfs4_open_delegation_recall(struct nfs_open_context *ctx,
5eb8d18c 2306 struct nfs4_state *state, const nfs4_stateid *stateid)
db4f2e63
TM		 2307{
2308 struct nfs_server *server = NFS_SERVER(state->inode);
2309 struct nfs4_opendata *opendata;
24311f88 2310 int err = 0;
db4f2e63
TM		 2311
2312 opendata = nfs4_open_recoverdata_alloc(ctx, state,
2313 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
2314 if (IS_ERR(opendata))
2315 return PTR_ERR(opendata);
2316 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
5eb8d18c 2317 if (!test_bit(NFS_O_RDWR_STATE, &state->flags)) {
24311f88
TM		 2318 err = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
2319 if (err)
5eb8d18c
TM		 2320 goto out;
2321 }
2322 if (!test_bit(NFS_O_WRONLY_STATE, &state->flags)) {
24311f88
TM		 2323 err = nfs4_open_recover_helper(opendata, FMODE_WRITE);
2324 if (err)
5eb8d18c
TM		 2325 goto out;
2326 }
2327 if (!test_bit(NFS_O_RDONLY_STATE, &state->flags)) {
24311f88 2328 err = nfs4_open_recover_helper(opendata, FMODE_READ);
5eb8d18c
TM		 2329 if (err)
2330 goto out;
24311f88 2331 }
5eb8d18c
TM		 2332 nfs_state_clear_delegation(state);
2333out:
db4f2e63 2334 nfs4_opendata_put(opendata);
dce2630c 2335 return nfs4_handle_delegation_recall_error(server, state, stateid, NULL, err);
db4f2e63
TM		 2336}
2337
be05c860
CL		 2338static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
2339{
2340 struct nfs4_opendata *data = calldata;
2341
7981c8a6
AS		 2342 nfs4_setup_sequence(data->o_arg.server->nfs_client,
2343 &data->c_arg.seq_args, &data->c_res.seq_res, task);
be05c860
CL		 2344}
2345
cdd4e68b
TM		 2346static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
2347{
2348 struct nfs4_opendata *data = calldata;
2349
17ead6c8 2350 nfs40_sequence_done(task, &data->c_res.seq_res);
be05c860 2351
cdd4e68b 2352 data->rpc_status = task->tk_status;
26e976a8 2353 if (data->rpc_status == 0) {
f597c537 2354 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 2355 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 2356 renew_lease(data->o_res.server, data->timestamp);
a7a3b1e9 2357 data->rpc_done = true;
26e976a8 2358 }
cdd4e68b
TM		 2359}
2360
2361static void nfs4_open_confirm_release(void *calldata)
2362{
2363 struct nfs4_opendata *data = calldata;
2364 struct nfs4_state *state = NULL;
2365
2366 /* If this request hasn't been cancelled, do nothing */
a7a3b1e9 2367 if (!data->cancelled)
cdd4e68b
TM		 2368 goto out_free;
2369 /* In case of error, no cleanup! */
3e309914 2370 if (!data->rpc_done)
cdd4e68b 2371 goto out_free;
cdd4e68b 2372 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 2373 if (!IS_ERR(state))
643168c2 2374 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 2375out_free:
c6d00e63 2376 nfs4_opendata_put(data);
cdd4e68b
TM		 2377}
2378
2379static const struct rpc_call_ops nfs4_open_confirm_ops = {
be05c860 2380 .rpc_call_prepare = nfs4_open_confirm_prepare,
cdd4e68b
TM		 2381 .rpc_call_done = nfs4_open_confirm_done,
2382 .rpc_release = nfs4_open_confirm_release,
2383};
2384
2385/*
2386 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
2387 */
2388static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
2389{
2b0143b5 2390 struct nfs_server *server = NFS_SERVER(d_inode(data->dir));
cdd4e68b 2391 struct rpc_task *task;
5138fde0
TM		 2392 struct rpc_message msg = {
2393 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
2394 .rpc_argp = &data->c_arg,
2395 .rpc_resp = &data->c_res,
2396 .rpc_cred = data->owner->so_cred,
2397 };
c970aa85
TM		 2398 struct rpc_task_setup task_setup_data = {
2399 .rpc_client = server->client,
5138fde0 2400 .rpc_message = &msg,
c970aa85
TM		 2401 .callback_ops = &nfs4_open_confirm_ops,
2402 .callback_data = data,
101070ca 2403 .workqueue = nfsiod_workqueue,
61296507 2404 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF,
c970aa85 2405 };
1da177e4
LT		 2406 int status;
2407
fba83f34
AS		 2408 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1,
2409 data->is_recover);
c6d00e63 2410 kref_get(&data->kref);
a7a3b1e9 2411 data->rpc_done = false;
3e309914 2412 data->rpc_status = 0;
5138fde0 2413 data->timestamp = jiffies;
c970aa85 2414 task = rpc_run_task(&task_setup_data);
7a1218a2 2415 if (IS_ERR(task))
cdd4e68b 2416 return PTR_ERR(task);
820bf85c 2417 status = rpc_wait_for_completion_task(task);
cdd4e68b 2418 if (status != 0) {
a7a3b1e9 2419 data->cancelled = true;
cdd4e68b
TM		 2420 smp_wmb();
2421 } else
2422 status = data->rpc_status;
e6b3c4db 2423 rpc_put_task(task);
1da177e4
LT		 2424 return status;
2425}
2426
24ac23ab 2427static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 2428{
24ac23ab
TM		 2429 struct nfs4_opendata *data = calldata;
2430 struct nfs4_state_owner *sp = data->owner;
549b19cc 2431 struct nfs_client *clp = sp->so_server->nfs_client;
2a606188 2432 enum open_claim_type4 claim = data->o_arg.claim;
5138fde0 2433
24ac23ab 2434 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 2435 goto out_wait;
aac00a8d
TM		 2436 /*
2437 * Check if we still need to send an OPEN call, or if we can use
2438 * a delegation instead.
2439 */
2440 if (data->state != NULL) {
2441 struct nfs_delegation *delegation;
2442
be189f7e
TM		 2443 if (can_open_cached(data->state, data->o_arg.fmode,
2444 data->o_arg.open_flags, claim))
6ee41268 2445 goto out_no_action;
aac00a8d 2446 rcu_read_lock();
be3df3dd 2447 delegation = nfs4_get_valid_delegation(data->state->inode);
2a606188 2448 if (can_open_delegated(delegation, data->o_arg.fmode, claim))
652f89f6 2449 goto unlock_no_action;
aac00a8d
TM		 2450 rcu_read_unlock();
2451 }
95b72eb0 2452 /* Update client id. */
549b19cc 2453 data->o_arg.clientid = clp->cl_clientid;
2a606188
TM		 2454 switch (claim) {
2455 default:
2456 break;
8188df17
TM		 2457 case NFS4_OPEN_CLAIM_PREVIOUS:
2458 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
2459 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 2460 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
df561f66 2461 fallthrough;
8188df17
TM		 2462 case NFS4_OPEN_CLAIM_FH:
2463 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5 2464 }
26e976a8 2465 data->timestamp = jiffies;
42e1cca7 2466 if (nfs4_setup_sequence(data->o_arg.server->nfs_client,
d898528c 2467 &data->o_arg.seq_args,
2240a9e2
TM		 2468 &data->o_res.seq_res,
2469 task) != 0)
2470 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 2471
2472 /* Set the create mode (note dependency on the session type) */
2473 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
2474 if (data->o_arg.open_flags & O_EXCL) {
2475 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
2476 if (nfs4_has_persistent_session(clp))
2477 data->o_arg.createmode = NFS4_CREATE_GUARDED;
2478 else if (clp->cl_mvops->minor_version > 0)
2479 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
2480 }
6ee41268 2481 return;
652f89f6 2482unlock_no_action:
9759b0fb 2483 trace_nfs4_cached_open(data->state);
652f89f6 2484 rcu_read_unlock();
6ee41268
TM		 2485out_no_action:
2486 task->tk_action = NULL;
c8da19b9 2487out_wait:
b75ad4cd 2488 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 2489}
2490
24ac23ab
TM		 2491static void nfs4_open_done(struct rpc_task *task, void *calldata)
2492{
2493 struct nfs4_opendata *data = calldata;
1da177e4 2494
24ac23ab 2495 data->rpc_status = task->tk_status;
d898528c 2496
2e80dbe7 2497 if (!nfs4_sequence_process(task, &data->o_res.seq_res))
14516c3a 2498 return;
d898528c 2499
24ac23ab 2500 if (task->tk_status == 0) {
807d66d8
TM		 2501 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
2502 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 2503 case S_IFREG:
2504 break;
2505 case S_IFLNK:
24ac23ab 2506 data->rpc_status = -ELOOP;
6f926b5b
TM		 2507 break;
2508 case S_IFDIR:
24ac23ab 2509 data->rpc_status = -EISDIR;
6f926b5b
TM		 2510 break;
2511 default:
24ac23ab 2512 data->rpc_status = -ENOTDIR;
807d66d8 2513 }
6f926b5b 2514 }
26e976a8 2515 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 2516 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
2517 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 2518 }
a7a3b1e9 2519 data->rpc_done = true;
24ac23ab 2520}
6f926b5b 2521
24ac23ab
TM		 2522static void nfs4_open_release(void *calldata)
2523{
2524 struct nfs4_opendata *data = calldata;
2525 struct nfs4_state *state = NULL;
2526
2527 /* If this request hasn't been cancelled, do nothing */
a7a3b1e9 2528 if (!data->cancelled)
24ac23ab
TM		 2529 goto out_free;
2530 /* In case of error, no cleanup! */
3e309914 2531 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 2532 goto out_free;
2533 /* In case we need an open_confirm, no cleanup! */
2534 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
2535 goto out_free;
24ac23ab 2536 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 2537 if (!IS_ERR(state))
643168c2 2538 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 2539out_free:
c6d00e63 2540 nfs4_opendata_put(data);
24ac23ab
TM		 2541}
2542
2543static const struct rpc_call_ops nfs4_open_ops = {
2544 .rpc_call_prepare = nfs4_open_prepare,
2545 .rpc_call_done = nfs4_open_done,
2546 .rpc_release = nfs4_open_release,
2547};
2548
3b65a30d
FI		 2549static int nfs4_run_open_task(struct nfs4_opendata *data,
2550 struct nfs_open_context *ctx)
24ac23ab 2551{
2b0143b5 2552 struct inode *dir = d_inode(data->dir);
24ac23ab
TM		 2553 struct nfs_server *server = NFS_SERVER(dir);
2554 struct nfs_openargs *o_arg = &data->o_arg;
2555 struct nfs_openres *o_res = &data->o_res;
2556 struct rpc_task *task;
5138fde0
TM		 2557 struct rpc_message msg = {
2558 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
2559 .rpc_argp = o_arg,
2560 .rpc_resp = o_res,
2561 .rpc_cred = data->owner->so_cred,
2562 };
c970aa85
TM		 2563 struct rpc_task_setup task_setup_data = {
2564 .rpc_client = server->client,
5138fde0 2565 .rpc_message = &msg,
c970aa85
TM		 2566 .callback_ops = &nfs4_open_ops,
2567 .callback_data = data,
101070ca 2568 .workqueue = nfsiod_workqueue,
61296507 2569 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF,
c970aa85 2570 };
24ac23ab
TM		 2571 int status;
2572
85e39fee
OK		 2573 if (server->nfs_client->cl_minorversion)
2574 task_setup_data.flags |= RPC_TASK_MOVEABLE;
2575
c6d00e63 2576 kref_get(&data->kref);
a7a3b1e9 2577 data->rpc_done = false;
3e309914 2578 data->rpc_status = 0;
a7a3b1e9
BC		 2579 data->cancelled = false;
2580 data->is_recover = false;
3b65a30d
FI		 2581 if (!ctx) {
2582 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1, 1);
a7a3b1e9 2583 data->is_recover = true;
67e7b52d 2584 task_setup_data.flags |= RPC_TASK_TIMEOUT;
2409a976 2585 } else {
3b65a30d 2586 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1, 0);
2409a976
FI		 2587 pnfs_lgopen_prepare(data, ctx);
2588 }
c970aa85 2589 task = rpc_run_task(&task_setup_data);
d9b67e1e
AS		 2590 if (IS_ERR(task))
2591 return PTR_ERR(task);
820bf85c 2592 status = rpc_wait_for_completion_task(task);
d9b67e1e 2593 if (status != 0) {
a7a3b1e9 2594 data->cancelled = true;
d9b67e1e
AS		 2595 smp_wmb();
2596 } else
2597 status = data->rpc_status;
2598 rpc_put_task(task);
b257957e
AB		 2599
2600 return status;
2601}
2602
2603static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
2604{
2b0143b5 2605 struct inode *dir = d_inode(data->dir);
b257957e 2606 struct nfs_openres *o_res = &data->o_res;
d9b67e1e 2607 int status;
b257957e 2608
3b65a30d 2609 status = nfs4_run_open_task(data, NULL);
b257957e
AB		 2610 if (status != 0 || !data->rpc_done)
2611 return status;
2612
6926afd1
TM		 2613 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
2614
d7e98258 2615 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM)
b257957e 2616 status = _nfs4_proc_open_confirm(data);
b257957e
AB		 2617
2618 return status;
2619}
2620
f3792d63
TM		 2621/*
2622 * Additional permission checks in order to distinguish between an
2623 * open for read, and an open for execute. This works around the
2624 * fact that NFSv4 OPEN treats read and execute permissions as being
2625 * the same.
2626 * Note that in the non-execute case, we want to turn off permission
2627 * checking if we just created a new file (POSIX open() semantics).
2628 */
a52458b4 2629static int nfs4_opendata_access(const struct cred *cred,
6168f62c 2630 struct nfs4_opendata *opendata,
f8d9a897
WAA		 2631 struct nfs4_state *state, fmode_t fmode,
2632 int openflags)
6168f62c
WAA		 2633{
2634 struct nfs_access_entry cache;
1e6f2095 2635 u32 mask, flags;
6168f62c
WAA		 2636
2637 /* access call failed or for some reason the server doesn't
2638 * support any access modes -- defer access call until later */
2639 if (opendata->o_res.access_supported == 0)
2640 return 0;
2641
2642 mask = 0;
f3792d63
TM		 2643 /*
2644 * Use openflags to check for exec, because fmode won't
2645 * always have FMODE_EXEC set when file open for exec.
2646 */
f8d9a897
WAA		 2647 if (openflags & __FMODE_EXEC) {
2648 /* ONLY check for exec rights */
1e6f2095
AS		 2649 if (S_ISDIR(state->inode->i_mode))
2650 mask = NFS4_ACCESS_LOOKUP;
2651 else
2652 mask = NFS4_ACCESS_EXECUTE;
f3792d63 2653 } else if ((fmode & FMODE_READ) && !opendata->file_created)
1e6f2095 2654 mask = NFS4_ACCESS_READ;
6168f62c
WAA		 2655
2656 cache.cred = cred;
6168f62c
WAA		 2657 nfs_access_set_mask(&cache, opendata->o_res.access_result);
2658 nfs_access_add_cache(state->inode, &cache);
2659
1e6f2095
AS		 2660 flags = NFS4_ACCESS_READ | NFS4_ACCESS_EXECUTE | NFS4_ACCESS_LOOKUP;
2661 if ((mask & ~cache.mask & flags) == 0)
6168f62c
WAA		 2662 return 0;
2663
998f40b5 2664 return -EACCES;
6168f62c
WAA		 2665}
2666
b257957e
AB		 2667/*
2668 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2669 */
3b65a30d
FI		 2670static int _nfs4_proc_open(struct nfs4_opendata *data,
2671 struct nfs_open_context *ctx)
b257957e 2672{
2b0143b5 2673 struct inode *dir = d_inode(data->dir);
b257957e
AB		 2674 struct nfs_server *server = NFS_SERVER(dir);
2675 struct nfs_openargs *o_arg = &data->o_arg;
2676 struct nfs_openres *o_res = &data->o_res;
2677 int status;
2678
3b65a30d 2679 status = nfs4_run_open_task(data, ctx);
08ef7bd3
TM		 2680 if (!data->rpc_done)
2681 return status;
2682 if (status != 0) {
2683 if (status == -NFS4ERR_BADNAME &&
2684 !(o_arg->open_flags & O_CREAT))
2685 return -ENOENT;
24ac23ab 2686 return status;
08ef7bd3 2687 }
24ac23ab 2688
6926afd1
TM		 2689 nfs_fattr_map_and_free_names(server, &data->f_attr);
2690
5bc2afc2 2691 if (o_arg->open_flags & O_CREAT) {
5bc2afc2 2692 if (o_arg->open_flags & O_EXCL)
a7a3b1e9 2693 data->file_created = true;
5bc2afc2 2694 else if (o_res->cinfo.before != o_res->cinfo.after)
a7a3b1e9 2695 data->file_created = true;
1eb5d98f
JL		 2696 if (data->file_created ||
2697 inode_peek_iversion_raw(dir) != o_res->cinfo.after)
1b523ca9
FL		 2698 nfs4_update_changeattr(dir, &o_res->cinfo,
2699 o_res->f_attr->time_start,
2700 NFS_INO_INVALID_DATA);
5bc2afc2 2701 }
0df5dd4a
TM		 2702 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2703 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 2704 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 2705 status = _nfs4_proc_open_confirm(data);
1da177e4 2706 if (status != 0)
24ac23ab 2707 return status;
1da177e4 2708 }
56e0d71e
TM		 2709 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR)) {
2710 nfs4_sequence_free_slot(&o_res->seq_res);
a841b54d
TM		 2711 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr,
2712 o_res->f_label, NULL);
56e0d71e 2713 }
24ac23ab 2714 return 0;
1da177e4
LT		 2715}
2716
1da177e4
LT		 2717/*
2718 * OPEN_EXPIRED:
2719 * reclaim state on the server after a network partition.
2720 * Assumes caller holds the appropriate lock
2721 */
539cd03a 2722static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 2723{
e56e0b78 2724 struct nfs4_opendata *opendata;
864472e9 2725 int ret;
1da177e4 2726
4a1c0893 2727 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 2728 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 2729 if (IS_ERR(opendata))
2730 return PTR_ERR(opendata);
864472e9 2731 ret = nfs4_open_recover(opendata, state);
35d05778 2732 if (ret == -ESTALE)
3d4ff43d 2733 d_drop(ctx->dentry);
c6d00e63 2734 nfs4_opendata_put(opendata);
864472e9 2735 return ret;
1da177e4
LT		 2736}
2737
a9ed2e25 2738static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 2739{
539cd03a 2740 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 2741 struct nfs4_exception exception = { };
2742 int err;
2743
2744 do {
539cd03a 2745 err = _nfs4_open_expired(ctx, state);
42113a75 2746 trace_nfs4_open_expired(ctx, 0, err);
49f9a0fa
TM		 2747 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2748 continue;
a9ed2e25
TM		 2749 switch (err) {
2750 default:
2751 goto out;
2752 case -NFS4ERR_GRACE:
2753 case -NFS4ERR_DELAY:
2754 nfs4_handle_exception(server, err, &exception);
2755 err = 0;
2756 }
202b50dc 2757 } while (exception.retry);
a9ed2e25 2758out:
202b50dc
TM		 2759 return err;
2760}
2761
1da177e4
LT		 2762static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2763{
1da177e4 2764 struct nfs_open_context *ctx;
864472e9 2765 int ret;
1da177e4 2766
864472e9
TM		 2767 ctx = nfs4_state_find_open_context(state);
2768 if (IS_ERR(ctx))
91876b13 2769 return -EAGAIN;
539cd03a 2770 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 2771 put_nfs_open_context(ctx);
2772 return ret;
1da177e4
LT		 2773}
2774
41020b67
TM		 2775static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state,
2776 const nfs4_stateid *stateid)
4dfd4f7a 2777{
41020b67 2778 nfs_remove_bad_delegation(state->inode, stateid);
9f0c5124 2779 nfs_state_clear_delegation(state);
4dfd4f7a
TM		 2780}
2781
2782static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
2783{
2784 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
41020b67 2785 nfs_finish_clear_delegation_stateid(state, NULL);
4dfd4f7a
TM		 2786}
2787
2788static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2789{
2790 /* NFSv4.0 doesn't allow for delegation recovery on open expire */
2791 nfs40_clear_delegation_stateid(state);
27a30cf6 2792 nfs_state_clear_open_state_flags(state);
4dfd4f7a
TM		 2793 return nfs4_open_expired(sp, state);
2794}
2795
45870d69
TM		 2796static int nfs40_test_and_free_expired_stateid(struct nfs_server *server,
2797 nfs4_stateid *stateid,
a52458b4 2798 const struct cred *cred)
45870d69
TM		 2799{
2800 return -NFS4ERR_BAD_STATEID;
2801}
2802
f062eb6c 2803#if defined(CONFIG_NFS_V4_1)
4586f6e2
TM		 2804static int nfs41_test_and_free_expired_stateid(struct nfs_server *server,
2805 nfs4_stateid *stateid,
a52458b4 2806 const struct cred *cred)
4586f6e2
TM		 2807{
2808 int status;
2809
f7a62ada
TM		 2810 switch (stateid->type) {
2811 default:
2812 break;
2813 case NFS4_INVALID_STATEID_TYPE:
2814 case NFS4_SPECIAL_STATEID_TYPE:
2815 return -NFS4ERR_BAD_STATEID;
2816 case NFS4_REVOKED_STATEID_TYPE:
2817 goto out_free;
2818 }
4586f6e2 2819
f7a62ada 2820 status = nfs41_test_stateid(server, stateid, cred);
4586f6e2
TM		 2821 switch (status) {
2822 case -NFS4ERR_EXPIRED:
2823 case -NFS4ERR_ADMIN_REVOKED:
2824 case -NFS4ERR_DELEG_REVOKED:
f7a62ada
TM		 2825 break;
2826 default:
4586f6e2
TM		 2827 return status;
2828 }
f7a62ada
TM		 2829out_free:
2830 /* Ack the revoked state to the server */
f0b0bf88 2831 nfs41_free_stateid(server, stateid, cred, true);
f7a62ada 2832 return -NFS4ERR_EXPIRED;
4586f6e2
TM		 2833}
2834
27a30cf6 2835static int nfs41_check_delegation_stateid(struct nfs4_state *state)
f062eb6c 2836{
f062eb6c 2837 struct nfs_server *server = NFS_SERVER(state->inode);
0c116cad 2838 nfs4_stateid stateid;
ab7cb0df 2839 struct nfs_delegation *delegation;
a52458b4 2840 const struct cred *cred = NULL;
27a30cf6 2841 int status, ret = NFS_OK;
3e60ffdd 2842
ab7cb0df
TM		 2843 /* Get the delegation credential for use by test/free_stateid */
2844 rcu_read_lock();
2845 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
0c116cad 2846 if (delegation == NULL) {
ab7cb0df 2847 rcu_read_unlock();
9f0c5124 2848 nfs_state_clear_delegation(state);
27a30cf6 2849 return NFS_OK;
0c116cad
TM		 2850 }
2851
fc51b1cf 2852 spin_lock(&delegation->lock);
0c116cad 2853 nfs4_stateid_copy(&stateid, &delegation->stateid);
0c116cad 2854
994b15b9
TM		 2855 if (!test_and_clear_bit(NFS_DELEGATION_TEST_EXPIRED,
2856 &delegation->flags)) {
fc51b1cf 2857 spin_unlock(&delegation->lock);
4c8e5447 2858 rcu_read_unlock();
27a30cf6 2859 return NFS_OK;
4c8e5447 2860 }
0c116cad 2861
a52458b4
N		 2862 if (delegation->cred)
2863 cred = get_cred(delegation->cred);
fc51b1cf 2864 spin_unlock(&delegation->lock);
0c116cad 2865 rcu_read_unlock();
4586f6e2 2866 status = nfs41_test_and_free_expired_stateid(server, &stateid, cred);
0c116cad 2867 trace_nfs4_test_delegation_stateid(state, NULL, status);
f7a62ada 2868 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID)
41020b67 2869 nfs_finish_clear_delegation_stateid(state, &stateid);
27a30cf6
TM		 2870 else
2871 ret = status;
ab7cb0df 2872
8c39a39e 2873 put_cred(cred);
27a30cf6
TM		 2874 return ret;
2875}
2876
2877static void nfs41_delegation_recover_stateid(struct nfs4_state *state)
2878{
2879 nfs4_stateid tmp;
2880
2881 if (test_bit(NFS_DELEGATED_STATE, &state->flags) &&
2882 nfs4_copy_delegation_stateid(state->inode, state->state,
2883 &tmp, NULL) &&
2884 nfs4_stateid_match_other(&state->stateid, &tmp))
2885 nfs_state_set_delegation(state, &tmp, state->state);
2886 else
2887 nfs_state_clear_delegation(state);
3e60ffdd
CL		 2888}
2889
c5896fc8
TM		 2890/**
2891 * nfs41_check_expired_locks - possibly free a lock stateid
2892 *
2893 * @state: NFSv4 state for an inode
2894 *
2895 * Returns NFS_OK if recovery for this stateid is now finished.
2896 * Otherwise a negative NFS4ERR value is returned.
2897 */
2898static int nfs41_check_expired_locks(struct nfs4_state *state)
2899{
2900 int status, ret = NFS_OK;
d75a6a0e 2901 struct nfs4_lock_state *lsp, *prev = NULL;
c5896fc8
TM		 2902 struct nfs_server *server = NFS_SERVER(state->inode);
2903
2904 if (!test_bit(LK_STATE_IN_USE, &state->flags))
2905 goto out;
d75a6a0e
BC		 2906
2907 spin_lock(&state->state_lock);
c5896fc8
TM		 2908 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
2909 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
a52458b4 2910 const struct cred *cred = lsp->ls_state->owner->so_cred;
c5896fc8 2911
194bc1f4 2912 refcount_inc(&lsp->ls_count);
d75a6a0e
BC		 2913 spin_unlock(&state->state_lock);
2914
2915 nfs4_put_lock_state(prev);
2916 prev = lsp;
2917
c5896fc8
TM		 2918 status = nfs41_test_and_free_expired_stateid(server,
2919 &lsp->ls_stateid,
2920 cred);
2921 trace_nfs4_test_lock_stateid(state, lsp, status);
2922 if (status == -NFS4ERR_EXPIRED ||
2923 status == -NFS4ERR_BAD_STATEID) {
2924 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
67dd4830 2925 lsp->ls_stateid.type = NFS4_INVALID_STATEID_TYPE;
c5896fc8
TM		 2926 if (!recover_lost_locks)
2927 set_bit(NFS_LOCK_LOST, &lsp->ls_flags);
2928 } else if (status != NFS_OK) {
2929 ret = status;
d75a6a0e
BC		 2930 nfs4_put_lock_state(prev);
2931 goto out;
c5896fc8 2932 }
d75a6a0e 2933 spin_lock(&state->state_lock);
c5896fc8 2934 }
d75a6a0e
BC		 2935 }
2936 spin_unlock(&state->state_lock);
2937 nfs4_put_lock_state(prev);
c5896fc8
TM		 2938out:
2939 return ret;
2940}
2941
3e60ffdd
CL		 2942/**
2943 * nfs41_check_open_stateid - possibly free an open stateid
2944 *
2945 * @state: NFSv4 state for an inode
2946 *
2947 * Returns NFS_OK if recovery for this stateid is now finished.
2948 * Otherwise a negative NFS4ERR value is returned.
2949 */
2950static int nfs41_check_open_stateid(struct nfs4_state *state)
2951{
2952 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 2953 nfs4_stateid *stateid = &state->open_stateid;
a52458b4 2954 const struct cred *cred = state->owner->so_cred;
3e60ffdd
CL		 2955 int status;
2956
27a30cf6 2957 if (test_bit(NFS_OPEN_STATE, &state->flags) == 0)
3e60ffdd 2958 return -NFS4ERR_BAD_STATEID;
4586f6e2 2959 status = nfs41_test_and_free_expired_stateid(server, stateid, cred);
08cb47fa 2960 trace_nfs4_test_open_stateid(state, NULL, status);
f7a62ada 2961 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID) {
27a30cf6 2962 nfs_state_clear_open_state_flags(state);
67dd4830 2963 stateid->type = NFS4_INVALID_STATEID_TYPE;
8a64c4ef 2964 return status;
c0ca0e59 2965 }
8a64c4ef
TM		 2966 if (nfs_open_stateid_recover_openmode(state))
2967 return -NFS4ERR_OPENMODE;
2968 return NFS_OK;
b01dd1d8
BS		 2969}
2970
2971static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2972{
eb64cf96 2973 int status;
b01dd1d8 2974
27a30cf6
TM		 2975 status = nfs41_check_delegation_stateid(state);
2976 if (status != NFS_OK)
2977 return status;
2978 nfs41_delegation_recover_stateid(state);
2979
c5896fc8
TM		 2980 status = nfs41_check_expired_locks(state);
2981 if (status != NFS_OK)
2982 return status;
3e60ffdd 2983 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 2984 if (status != NFS_OK)
2985 status = nfs4_open_expired(sp, state);
2986 return status;
f062eb6c
BS		 2987}
2988#endif
2989
aa53ed54
JL		 2990/*
2991 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2992 * fields corresponding to attributes that were used to store the verifier.
2993 * Make sure we clobber those fields in the later setattr call
2994 */
609339c1 2995static unsigned nfs4_exclusive_attrset(struct nfs4_opendata *opendata,
5334c5bd 2996 struct iattr *sattr, struct nfs4_label **label)
aa53ed54 2997{
609339c1
TM		 2998 const __u32 *bitmask = opendata->o_arg.server->exclcreat_bitmask;
2999 __u32 attrset[3];
3000 unsigned ret;
3001 unsigned i;
5334c5bd 3002
609339c1
TM		 3003 for (i = 0; i < ARRAY_SIZE(attrset); i++) {
3004 attrset[i] = opendata->o_res.attrset[i];
3005 if (opendata->o_arg.createmode == NFS4_CREATE_EXCLUSIVE4_1)
3006 attrset[i] &= ~bitmask[i];
3007 }
3008
3009 ret = (opendata->o_arg.createmode == NFS4_CREATE_EXCLUSIVE) ?
3010 sattr->ia_valid : 0;
aa53ed54 3011
609339c1
TM		 3012 if ((attrset[1] & (FATTR4_WORD1_TIME_ACCESS|FATTR4_WORD1_TIME_ACCESS_SET))) {
3013 if (sattr->ia_valid & ATTR_ATIME_SET)
3014 ret |= ATTR_ATIME_SET;
3015 else
3016 ret |= ATTR_ATIME;
3017 }
5334c5bd 3018
609339c1
TM		 3019 if ((attrset[1] & (FATTR4_WORD1_TIME_MODIFY|FATTR4_WORD1_TIME_MODIFY_SET))) {
3020 if (sattr->ia_valid & ATTR_MTIME_SET)
3021 ret |= ATTR_MTIME_SET;
3022 else
3023 ret |= ATTR_MTIME;
3024 }
5334c5bd 3025
609339c1 3026 if (!(attrset[2] & FATTR4_WORD2_SECURITY_LABEL))
5334c5bd 3027 *label = NULL;
609339c1 3028 return ret;
aa53ed54
JL		 3029}
3030
c21443c2 3031static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
1bf85d8c 3032 int flags, struct nfs_open_context *ctx)
c21443c2
TM		 3033{
3034 struct nfs4_state_owner *sp = opendata->owner;
3035 struct nfs_server *server = sp->so_server;
275bb307 3036 struct dentry *dentry;
c21443c2 3037 struct nfs4_state *state;
1bf85d8c 3038 fmode_t acc_mode = _nfs4_ctx_to_accessmode(ctx);
cf5b4059
TM		 3039 struct inode *dir = d_inode(opendata->dir);
3040 unsigned long dir_verifier;
c21443c2
TM		 3041 unsigned int seq;
3042 int ret;
3043
3044 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
cf5b4059 3045 dir_verifier = nfs_save_change_attribute(dir);
c21443c2 3046
3b65a30d 3047 ret = _nfs4_proc_open(opendata, ctx);
dca78001 3048 if (ret != 0)
c21443c2
TM		 3049 goto out;
3050
ae55e59d 3051 state = _nfs4_opendata_to_nfs4_state(opendata);
c21443c2
TM		 3052 ret = PTR_ERR(state);
3053 if (IS_ERR(state))
3054 goto out;
a974deee 3055 ctx->state = state;
c21443c2
TM		 3056 if (server->caps & NFS_CAP_POSIX_LOCK)
3057 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
a8ce377a
JL		 3058 if (opendata->o_res.rflags & NFS4_OPEN_RESULT_MAY_NOTIFY_LOCK)
3059 set_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags);
c21443c2 3060
275bb307 3061 dentry = opendata->dentry;
2b0143b5 3062 if (d_really_is_negative(dentry)) {
668d0cd5 3063 struct dentry *alias;
275bb307 3064 d_drop(dentry);
668d0cd5
AV		 3065 alias = d_exact_alias(dentry, state->inode);
3066 if (!alias)
3067 alias = d_splice_alias(igrab(state->inode), dentry);
3068 /* d_splice_alias() can't fail here - it's a non-directory */
3069 if (alias) {
275bb307 3070 dput(ctx->dentry);
668d0cd5 3071 ctx->dentry = dentry = alias;
275bb307 3072 }
cf5b4059
TM		 3073 }
3074
3075 switch(opendata->o_arg.claim) {
3076 default:
3077 break;
3078 case NFS4_OPEN_CLAIM_NULL:
3079 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
3080 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
3081 if (!opendata->rpc_done)
3082 break;
3083 if (opendata->o_res.delegation_type != 0)
3084 dir_verifier = nfs_save_change_attribute(dir);
3085 nfs_set_verifier(dentry, dir_verifier);
275bb307
TM		 3086 }
3087
af9b6d75
TM		 3088 /* Parse layoutget results before we check for access */
3089 pnfs_parse_lgopen(state->inode, opendata->lgp, ctx);
3090
1bf85d8c
TM		 3091 ret = nfs4_opendata_access(sp->so_cred, opendata, state,
3092 acc_mode, flags);
c21443c2
TM		 3093 if (ret != 0)
3094 goto out;
3095
2b0143b5 3096 if (d_inode(dentry) == state->inode) {
c45ffdd2
TM		 3097 nfs_inode_attach_open_context(ctx);
3098 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
3099 nfs4_schedule_stateid_recovery(server, state);
3100 }
2409a976 3101
c21443c2 3102out:
0cb98abb
OK		 3103 if (!opendata->cancelled)
3104 nfs4_sequence_free_slot(&opendata->o_res.seq_res);
c21443c2
TM		 3105 return ret;
3106}
3107
1da177e4 3108/*
24ac23ab 3109 * Returns a referenced nfs4_state
1da177e4 3110 */
82be417a 3111static int _nfs4_do_open(struct inode *dir,
4197a055 3112 struct nfs_open_context *ctx,
82be417a 3113 int flags,
8fd1ab74 3114 const struct nfs4_open_createattrs *c,
5bc2afc2 3115 int *opened)
1da177e4
LT		 3116{
3117 struct nfs4_state_owner *sp;
3118 struct nfs4_state *state = NULL;
3119 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 3120 struct nfs4_opendata *opendata;
4197a055 3121 struct dentry *dentry = ctx->dentry;
a52458b4 3122 const struct cred *cred = ctx->cred;
4197a055 3123 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
1bf85d8c 3124 fmode_t fmode = _nfs4_ctx_to_openmode(ctx);
49f9a0fa 3125 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
8fd1ab74
TM		 3126 struct iattr *sattr = c->sattr;
3127 struct nfs4_label *label = c->label;
1775fd3e 3128 struct nfs4_label *olabel = NULL;
aac00a8d 3129 int status;
1da177e4
LT		 3130
3131 /* Protect against reboot recovery conflicts */
1da177e4 3132 status = -ENOMEM;
d1e284d5
TM		 3133 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
3134 if (sp == NULL) {
1da177e4
LT		 3135 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
3136 goto out_err;
3137 }
334f87dd 3138 status = nfs4_client_recover_expired_lease(server->nfs_client);
58d9714a 3139 if (status != 0)
b4454fe1 3140 goto err_put_state_owner;
2b0143b5
DH		 3141 if (d_really_is_positive(dentry))
3142 nfs4_return_incompatible_delegation(d_inode(dentry), fmode);
58d9714a 3143 status = -ENOMEM;
2b0143b5 3144 if (d_really_is_positive(dentry))
49f9a0fa 3145 claim = NFS4_OPEN_CLAIM_FH;
8fd1ab74
TM		 3146 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags,
3147 c, claim, GFP_KERNEL);
e56e0b78 3148 if (opendata == NULL)
95d35cb4 3149 goto err_put_state_owner;
1da177e4 3150
14c43f76
DQ		 3151 if (label) {
3152 olabel = nfs4_label_alloc(server, GFP_KERNEL);
3153 if (IS_ERR(olabel)) {
3154 status = PTR_ERR(olabel);
3155 goto err_opendata_put;
3156 }
3157 }
3158
e911b815
TM		 3159 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
3160 if (!opendata->f_attr.mdsthreshold) {
3161 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
3162 if (!opendata->f_attr.mdsthreshold)
3163 goto err_free_label;
3164 }
1549210f 3165 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 3166 }
2b0143b5
DH		 3167 if (d_really_is_positive(dentry))
3168 opendata->state = nfs4_get_open_state(d_inode(dentry), sp);
aac00a8d 3169
1bf85d8c 3170 status = _nfs4_open_and_get_state(opendata, flags, ctx);
6168f62c 3171 if (status != 0)
14c43f76 3172 goto err_free_label;
3efb9722 3173 state = ctx->state;
6168f62c 3174
efcbc04e 3175 if ((opendata->o_arg.open_flags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) &&
549b19cc 3176 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
609339c1 3177 unsigned attrs = nfs4_exclusive_attrset(opendata, sattr, &label);
a1d1c4f1
TM		 3178 /*
3179 * send create attributes which was not set by open
3180 * with an extra setattr.
3181 */
609339c1
TM		 3182 if (attrs || label) {
3183 unsigned ia_old = sattr->ia_valid;
3184
3185 sattr->ia_valid = attrs;
a1d1c4f1
TM		 3186 nfs_fattr_init(opendata->o_res.f_attr);
3187 status = nfs4_do_setattr(state->inode, cred,
3188 opendata->o_res.f_attr, sattr,
29b59f94 3189 ctx, label, olabel);
a1d1c4f1
TM		 3190 if (status == 0) {
3191 nfs_setattr_update_inode(state->inode, sattr,
3192 opendata->o_res.f_attr);
3193 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
3194 }
609339c1 3195 sattr->ia_valid = ia_old;
1775fd3e 3196 }
0ab64e0e 3197 }
c5c3fb5f 3198 if (opened && opendata->file_created)
73a09dd9 3199 *opened = 1;
82be417a 3200
e911b815 3201 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
82be417a 3202 *ctx_th = opendata->f_attr.mdsthreshold;
e911b815
TM		 3203 opendata->f_attr.mdsthreshold = NULL;
3204 }
82be417a 3205
14c43f76
DQ		 3206 nfs4_label_free(olabel);
3207
c6d00e63 3208 nfs4_opendata_put(opendata);
1da177e4 3209 nfs4_put_state_owner(sp);
1da177e4 3210 return 0;
14c43f76
DQ		 3211err_free_label:
3212 nfs4_label_free(olabel);
c6d00e63
TM		 3213err_opendata_put:
3214 nfs4_opendata_put(opendata);
e56e0b78
TM		 3215err_put_state_owner:
3216 nfs4_put_state_owner(sp);
1da177e4 3217out_err:
1da177e4
LT		 3218 return status;
3219}
3220
3221
82be417a 3222static struct nfs4_state *nfs4_do_open(struct inode *dir,
4197a055 3223 struct nfs_open_context *ctx,
82be417a
AA		 3224 int flags,
3225 struct iattr *sattr,
5bc2afc2
TM		 3226 struct nfs4_label *label,
3227 int *opened)
1da177e4 3228{
49f9a0fa 3229 struct nfs_server *server = NFS_SERVER(dir);
0688e64b
TM		 3230 struct nfs4_exception exception = {
3231 .interruptible = true,
3232 };
1da177e4 3233 struct nfs4_state *res;
8fd1ab74
TM		 3234 struct nfs4_open_createattrs c = {
3235 .label = label,
3236 .sattr = sattr,
3237 .verf = {
3238 [0] = (__u32)jiffies,
3239 [1] = (__u32)current->pid,
3240 },
3241 };
1da177e4
LT		 3242 int status;
3243
3244 do {
8fd1ab74 3245 status = _nfs4_do_open(dir, ctx, flags, &c, opened);
3efb9722 3246 res = ctx->state;
42113a75 3247 trace_nfs4_open_file(ctx, flags, status);
1da177e4
LT		 3248 if (status == 0)
3249 break;
3250 /* NOTE: BAD_SEQID means the server and client disagree about the
3251 * book-keeping w.r.t. state-changing operations
3252 * (OPEN/CLOSE/LOCK/LOCKU...)
3253 * It is actually a sign of a bug on the client or on the server.
3254 *
3255 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 3256 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 3257 * have unhashed the old state_owner for us, and that we can
3258 * therefore safely retry using a new one. We should still warn
3259 * the user though...
3260 */
3261 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 3262 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 3263 " returned a bad sequence-id error!\n",
3264 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 3265 exception.retry = 1;
3266 continue;
3267 }
550f5747
TM		 3268 /*
3269 * BAD_STATEID on OPEN means that the server cancelled our
3270 * state before it received the OPEN_CONFIRM.
3271 * Recover by retrying the request as per the discussion
3272 * on Page 181 of RFC3530.
3273 */
3274 if (status == -NFS4ERR_BAD_STATEID) {
3275 exception.retry = 1;
3276 continue;
3277 }
924491f2
RM		 3278 if (status == -NFS4ERR_EXPIRED) {
3279 nfs4_schedule_lease_recovery(server->nfs_client);
3280 exception.retry = 1;
3281 continue;
3282 }
aac00a8d
TM		 3283 if (status == -EAGAIN) {
3284 /* We must have found a delegation */
3285 exception.retry = 1;
3286 continue;
3287 }
49f9a0fa
TM		 3288 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
3289 continue;
3290 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 3291 status, &exception));
3292 } while (exception.retry);
3293 return res;
3294}
3295
8487c479
TM		 3296static int _nfs4_do_setattr(struct inode *inode,
3297 struct nfs_setattrargs *arg,
3298 struct nfs_setattrres *res,
a52458b4 3299 const struct cred *cred,
29b59f94 3300 struct nfs_open_context *ctx)
1da177e4 3301{
3e4f6290 3302 struct nfs_server *server = NFS_SERVER(inode);
d9b67e1e 3303 struct rpc_message msg = {
659bfcd6 3304 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
8487c479
TM		 3305 .rpc_argp = arg,
3306 .rpc_resp = res,
659bfcd6 3307 .rpc_cred = cred,
d9b67e1e 3308 };
a52458b4 3309 const struct cred *delegation_cred = NULL;
26e976a8 3310 unsigned long timestamp = jiffies;
ee3ae84e 3311 bool truncate;
65e4308d 3312 int status;
1da177e4 3313
8487c479 3314 nfs_fattr_init(res->fattr);
1da177e4 3315
ee3ae84e 3316 /* Servers should only apply open mode checks for file size changes */
8487c479 3317 truncate = (arg->iap->ia_valid & ATTR_SIZE) ? true : false;
644c9f40
CL		 3318 if (!truncate) {
3319 nfs4_inode_make_writeable(inode);
991eedb1 3320 goto zero_stateid;
644c9f40 3321 }
ee3ae84e 3322
991eedb1 3323 if (nfs4_copy_delegation_stateid(inode, FMODE_WRITE, &arg->stateid, &delegation_cred)) {
ee3ae84e 3324 /* Use that stateid */
09a54f0e 3325 } else if (ctx != NULL && ctx->state) {
17393475 3326 struct nfs_lock_context *l_ctx;
29b59f94 3327 if (!nfs4_valid_open_stateid(ctx->state))
0418dae1 3328 return -EBADF;
17393475
N		 3329 l_ctx = nfs_get_lock_context(ctx);
3330 if (IS_ERR(l_ctx))
3331 return PTR_ERR(l_ctx);
7a0566b3
N		 3332 status = nfs4_select_rw_stateid(ctx->state, FMODE_WRITE, l_ctx,
3333 &arg->stateid, &delegation_cred);
3334 nfs_put_lock_context(l_ctx);
3335 if (status == -EIO)
0418dae1 3336 return -EBADF;
d826e5b8
OK		 3337 else if (status == -EAGAIN)
3338 goto zero_stateid;
991eedb1
TM		 3339 } else {
3340zero_stateid:
8487c479 3341 nfs4_stateid_copy(&arg->stateid, &zero_stateid);
991eedb1 3342 }
abf4e13c
TM		 3343 if (delegation_cred)
3344 msg.rpc_cred = delegation_cred;
1da177e4 3345
8487c479 3346 status = nfs4_call_sync(server->client, server, &msg, &arg->seq_args, &res->seq_res, 1);
abf4e13c 3347
a52458b4 3348 put_cred(delegation_cred);
29b59f94 3349 if (status == 0 && ctx != NULL)
26e976a8 3350 renew_lease(server, timestamp);
8487c479 3351 trace_nfs4_setattr(inode, &arg->stateid, status);
65e4308d 3352 return status;
1da177e4
LT		 3353}
3354
a52458b4 3355static int nfs4_do_setattr(struct inode *inode, const struct cred *cred,
659bfcd6 3356 struct nfs_fattr *fattr, struct iattr *sattr,
29b59f94 3357 struct nfs_open_context *ctx, struct nfs4_label *ilabel,
1775fd3e 3358 struct nfs4_label *olabel)
1da177e4 3359{
3e4f6290 3360 struct nfs_server *server = NFS_SERVER(inode);
30846df0 3361 __u32 bitmask[NFS4_BITMASK_SZ];
29b59f94 3362 struct nfs4_state *state = ctx ? ctx->state : NULL;
d9b67e1e
AS		 3363 struct nfs_setattrargs arg = {
3364 .fh = NFS_FH(inode),
3365 .iap = sattr,
8487c479 3366 .server = server,
30846df0 3367 .bitmask = bitmask,
8487c479 3368 .label = ilabel,
d9b67e1e
AS		 3369 };
3370 struct nfs_setattrres res = {
8487c479
TM		 3371 .fattr = fattr,
3372 .label = olabel,
3373 .server = server,
d9b67e1e 3374 };
a1d0b5ee
TM		 3375 struct nfs4_exception exception = {
3376 .state = state,
3114ea7a 3377 .inode = inode,
8487c479 3378 .stateid = &arg.stateid,
a1d0b5ee 3379 };
a71029b8 3380 unsigned long adjust_flags = NFS_INO_INVALID_CHANGE;
1da177e4 3381 int err;
8487c479 3382
720869eb
TM		 3383 if (sattr->ia_valid & (ATTR_MODE | ATTR_KILL_SUID | ATTR_KILL_SGID))
3384 adjust_flags |= NFS_INO_INVALID_MODE;
3385 if (sattr->ia_valid & (ATTR_UID | ATTR_GID))
a71029b8
TM		 3386 adjust_flags |= NFS_INO_INVALID_OTHER;
3387
1da177e4 3388 do {
a71029b8
TM		 3389 nfs4_bitmap_copy_adjust(bitmask, nfs4_bitmask(server, olabel),
3390 inode, adjust_flags);
30846df0 3391
29b59f94 3392 err = _nfs4_do_setattr(inode, &arg, &res, cred, ctx);
451146be
TM		 3393 switch (err) {
3394 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 3395 if (!(sattr->ia_valid & ATTR_SIZE)) {
3396 pr_warn_once("NFSv4: server %s is incorrectly "
3397 "applying open mode checks to "
3398 "a SETATTR that is not "
3399 "changing file size.\n",
3400 server->nfs_client->cl_hostname);
3401 }
451146be
TM		 3402 if (state && !(state->state & FMODE_WRITE)) {
3403 err = -EBADF;
3404 if (sattr->ia_valid & ATTR_OPEN)
3405 err = -EACCES;
3406 goto out;
3407 }
3408 }
3409 err = nfs4_handle_exception(server, err, &exception);
1da177e4 3410 } while (exception.retry);
451146be 3411out:
1da177e4
LT		 3412 return err;
3413}
3414
500d701f
PT		 3415static bool
3416nfs4_wait_on_layoutreturn(struct inode *inode, struct rpc_task *task)
3417{
3418 if (inode == NULL || !nfs_have_layout(inode))
3419 return false;
3420
3421 return pnfs_wait_on_layoutreturn(inode, task);
3422}
3423
0e0cb35b
TM		 3424/*
3425 * Update the seqid of an open stateid
3426 */
3427static void nfs4_sync_open_stateid(nfs4_stateid *dst,
3428 struct nfs4_state *state)
3429{
3430 __be32 seqid_open;
3431 u32 dst_seqid;
3432 int seq;
3433
3434 for (;;) {
3435 if (!nfs4_valid_open_stateid(state))
3436 break;
3437 seq = read_seqbegin(&state->seqlock);
3438 if (!nfs4_state_match_open_stateid_other(state, dst)) {
3439 nfs4_stateid_copy(dst, &state->open_stateid);
3440 if (read_seqretry(&state->seqlock, seq))
3441 continue;
3442 break;
3443 }
3444 seqid_open = state->open_stateid.seqid;
3445 if (read_seqretry(&state->seqlock, seq))
3446 continue;
3447
3448 dst_seqid = be32_to_cpu(dst->seqid);
3449 if ((s32)(dst_seqid - be32_to_cpu(seqid_open)) < 0)
3450 dst->seqid = seqid_open;
3451 break;
3452 }
3453}
3454
3455/*
3456 * Update the seqid of an open stateid after receiving
3457 * NFS4ERR_OLD_STATEID
3458 */
3459static bool nfs4_refresh_open_old_stateid(nfs4_stateid *dst,
3460 struct nfs4_state *state)
3461{
3462 __be32 seqid_open;
3463 u32 dst_seqid;
3464 bool ret;
b4868b44
BC		 3465 int seq, status = -EAGAIN;
3466 DEFINE_WAIT(wait);
0e0cb35b
TM		 3467
3468 for (;;) {
3469 ret = false;
3470 if (!nfs4_valid_open_stateid(state))
3471 break;
3472 seq = read_seqbegin(&state->seqlock);
3473 if (!nfs4_state_match_open_stateid_other(state, dst)) {
3474 if (read_seqretry(&state->seqlock, seq))
3475 continue;
3476 break;
3477 }
b4868b44
BC		 3478
3479 write_seqlock(&state->seqlock);
0e0cb35b 3480 seqid_open = state->open_stateid.seqid;
0e0cb35b
TM		 3481
3482 dst_seqid = be32_to_cpu(dst->seqid);
b4868b44
BC		 3483
3484 /* Did another OPEN bump the state's seqid? try again: */
3485 if ((s32)(be32_to_cpu(seqid_open) - dst_seqid) > 0) {
0e0cb35b 3486 dst->seqid = seqid_open;
b4868b44
BC		 3487 write_sequnlock(&state->seqlock);
3488 ret = true;
3489 break;
3490 }
3491
3492 /* server says we're behind but we haven't seen the update yet */
3493 set_bit(NFS_STATE_CHANGE_WAIT, &state->flags);
3494 prepare_to_wait(&state->waitq, &wait, TASK_KILLABLE);
3495 write_sequnlock(&state->seqlock);
3496 trace_nfs4_close_stateid_update_wait(state->inode, dst, 0);
3497
bb002388 3498 if (fatal_signal_pending(current))
b4868b44
BC		 3499 status = -EINTR;
3500 else
3501 if (schedule_timeout(5*HZ) != 0)
3502 status = 0;
3503
3504 finish_wait(&state->waitq, &wait);
3505
3506 if (!status)
3507 continue;
3508 if (status == -EINTR)
3509 break;
3510
3511 /* we slept the whole 5 seconds, we must have lost a seqid */
3512 dst->seqid = cpu_to_be32(dst_seqid + 1);
0e0cb35b
TM		 3513 ret = true;
3514 break;
3515 }
3516
3517 return ret;
3518}
3519
1da177e4
LT		 3520struct nfs4_closedata {
3521 struct inode *inode;
3522 struct nfs4_state *state;
3523 struct nfs_closeargs arg;
3524 struct nfs_closeres res;
cf805165
TM		 3525 struct {
3526 struct nfs4_layoutreturn_args arg;
3527 struct nfs4_layoutreturn_res res;
4d796d75 3528 struct nfs4_xdr_opaque_data ld_private;
cf805165
TM		 3529 u32 roc_barrier;
3530 bool roc;
3531 } lr;
516a6af6 3532 struct nfs_fattr fattr;
26e976a8 3533 unsigned long timestamp;
1da177e4
LT		 3534};
3535
963d8fe5 3536static void nfs4_free_closedata(void *data)
9512135d 3537{
963d8fe5
TM		 3538 struct nfs4_closedata *calldata = data;
3539 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 3540 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 3541
cf805165 3542 if (calldata->lr.roc)
1c5bd76d
TM		 3543 pnfs_roc_release(&calldata->lr.arg, &calldata->lr.res,
3544 calldata->res.lr_ret);
9512135d
TM		 3545 nfs4_put_open_state(calldata->state);
3546 nfs_free_seqid(calldata->arg.seqid);
9512135d 3547 nfs4_put_state_owner(sp);
322b2b90 3548 nfs_sb_deactive(sb);
9512135d
TM		 3549 kfree(calldata);
3550}
3551
963d8fe5 3552static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 3553{
963d8fe5 3554 struct nfs4_closedata *calldata = data;
1da177e4 3555 struct nfs4_state *state = calldata->state;
1da177e4 3556 struct nfs_server *server = NFS_SERVER(calldata->inode);
412f6c4c 3557 nfs4_stateid *res_stateid = NULL;
b8b8d221
TM		 3558 struct nfs4_exception exception = {
3559 .state = state,
3560 .inode = calldata->inode,
3561 .stateid = &calldata->arg.stateid,
3562 };
1da177e4 3563
a3ca5651 3564 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 3565 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
3566 return;
42113a75 3567 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
cf805165
TM		 3568
3569 /* Handle Layoutreturn errors */
078000d0
TM		 3570 if (pnfs_roc_done(task, &calldata->arg.lr_args, &calldata->res.lr_res,
3571 &calldata->res.lr_ret) == -EAGAIN)
287a9c55 3572 goto out_restart;
cf805165 3573
d9b67e1e 3574 /* hmm. we are done with the inode, and in the process of freeing
1da177e4
LT		 3575 * the state_owner. we keep this around to process errors
3576 */
1da177e4
LT		 3577 switch (task->tk_status) {
3578 case 0:
412f6c4c 3579 res_stateid = &calldata->res.stateid;
26e976a8 3580 renew_lease(server, calldata->timestamp);
412f6c4c 3581 break;
f07d4a31
TM		 3582 case -NFS4ERR_ACCESS:
3583 if (calldata->arg.bitmask != NULL) {
3584 calldata->arg.bitmask = NULL;
3585 calldata->res.fattr = NULL;
91b30d2e 3586 goto out_restart;
f07d4a31
TM		 3587
3588 }
3589 break;
12f275cd
TM		 3590 case -NFS4ERR_OLD_STATEID:
3591 /* Did we race with OPEN? */
0e0cb35b 3592 if (nfs4_refresh_open_old_stateid(&calldata->arg.stateid,
91b30d2e
TM		 3593 state))
3594 goto out_restart;
12f275cd 3595 goto out_release;
69794ad7 3596 case -NFS4ERR_ADMIN_REVOKED:
1da177e4 3597 case -NFS4ERR_STALE_STATEID:
26d36301
TM		 3598 case -NFS4ERR_EXPIRED:
3599 nfs4_free_revoked_stateid(server,
3600 &calldata->arg.stateid,
3601 task->tk_msg.rpc_cred);
df561f66 3602 fallthrough;
9e33bed5 3603 case -NFS4ERR_BAD_STATEID:
e217e825
TM		 3604 if (calldata->arg.fmode == 0)
3605 break;
df561f66 3606 fallthrough;
1da177e4 3607 default:
b8b8d221
TM		 3608 task->tk_status = nfs4_async_handle_exception(task,
3609 server, task->tk_status, &exception);
3610 if (exception.retry)
91b30d2e 3611 goto out_restart;
1da177e4 3612 }
4a1e2feb
TM		 3613 nfs_clear_open_stateid(state, &calldata->arg.stateid,
3614 res_stateid, calldata->arg.fmode);
69794ad7 3615out_release:
91b30d2e 3616 task->tk_status = 0;
72211dbe 3617 nfs_release_seqid(calldata->arg.seqid);
d8d84983 3618 nfs_refresh_inode(calldata->inode, &calldata->fattr);
a3ca5651 3619 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
91b30d2e 3620 return;
91b30d2e
TM		 3621out_restart:
3622 task->tk_status = 0;
3623 rpc_restart_call_prepare(task);
3624 goto out_release;
1da177e4
LT		 3625}
3626
4ce70ada 3627static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 3628{
4ce70ada 3629 struct nfs4_closedata *calldata = data;
9512135d 3630 struct nfs4_state *state = calldata->state;
7fdab069 3631 struct inode *inode = calldata->inode;
332d1a03 3632 struct nfs_server *server = NFS_SERVER(inode);
c8bf7073 3633 struct pnfs_layout_hdr *lo;
aee7af35 3634 bool is_rdonly, is_wronly, is_rdwr;
88069f77 3635 int call_close = 0;
9512135d 3636
a3ca5651 3637 dprintk("%s: begin!\n", __func__);
963d8fe5 3638 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 3639 goto out_wait;
003707c7 3640
88069f77 3641 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
4cecb76f 3642 spin_lock(&state->owner->so_lock);
aee7af35
TM		 3643 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
3644 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
3645 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
003707c7 3646 /* Calculate the change in open mode */
cd9288ff 3647 calldata->arg.fmode = 0;
e7616923 3648 if (state->n_rdwr == 0) {
cd9288ff
TM		 3649 if (state->n_rdonly == 0)
3650 call_close |= is_rdonly;
3651 else if (is_rdonly)
3652 calldata->arg.fmode |= FMODE_READ;
3653 if (state->n_wronly == 0)
3654 call_close |= is_wronly;
3655 else if (is_wronly)
3656 calldata->arg.fmode |= FMODE_WRITE;
e547f262
TM		 3657 if (calldata->arg.fmode != (FMODE_READ|FMODE_WRITE))
3658 call_close |= is_rdwr;
cd9288ff
TM		 3659 } else if (is_rdwr)
3660 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
3661
0e0cb35b
TM		 3662 nfs4_sync_open_stateid(&calldata->arg.stateid, state);
3663 if (!nfs4_valid_open_stateid(state))
5d422301 3664 call_close = 0;
4cecb76f 3665 spin_unlock(&state->owner->so_lock);
88069f77
TM		 3666
3667 if (!call_close) {
963d8fe5 3668 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 3669 goto out_no_action;
9512135d 3670 }
88069f77 3671
1c5bd76d 3672 if (!calldata->lr.roc && nfs4_wait_on_layoutreturn(inode, task)) {
500d701f
PT		 3673 nfs_release_seqid(calldata->arg.seqid);
3674 goto out_wait;
3675 }
3676
c8bf7073
TM		 3677 lo = calldata->arg.lr_args ? calldata->arg.lr_args->layout : NULL;
3678 if (lo && !pnfs_layout_is_valid(lo)) {
3679 calldata->arg.lr_args = NULL;
3680 calldata->res.lr_res = NULL;
3681 }
3682
9413a1a1 3683 if (calldata->arg.fmode == 0)
88069f77 3684 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
3ecefc92 3685
9413a1a1 3686 if (calldata->arg.fmode == 0 || calldata->arg.fmode == FMODE_READ) {
3ecefc92 3687 /* Close-to-open cache consistency revalidation */
76bd5c01 3688 if (!nfs4_have_delegation(inode, FMODE_READ)) {
332d1a03
TM		 3689 nfs4_bitmask_set(calldata->arg.bitmask_store,
3690 server->cache_consistency_bitmask,
3691 inode, server, NULL);
3692 calldata->arg.bitmask = calldata->arg.bitmask_store;
76bd5c01 3693 } else
3ecefc92
TM		 3694 calldata->arg.bitmask = NULL;
3695 }
3c13cb5b 3696
6ae37339
TM		 3697 calldata->arg.share_access =
3698 nfs4_map_atomic_open_share(NFS_SERVER(inode),
3699 calldata->arg.fmode, 0);
88069f77 3700
d8d84983
TM		 3701 if (calldata->res.fattr == NULL)
3702 calldata->arg.bitmask = NULL;
3703 else if (calldata->arg.bitmask == NULL)
3704 calldata->res.fattr = NULL;
26e976a8 3705 calldata->timestamp = jiffies;
42e1cca7 3706 if (nfs4_setup_sequence(NFS_SERVER(inode)->nfs_client,
9d12b216
TM		 3707 &calldata->arg.seq_args,
3708 &calldata->res.seq_res,
2240a9e2
TM		 3709 task) != 0)
3710 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 3711 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 3712 return;
3713out_no_action:
3714 task->tk_action = NULL;
3715out_wait:
3716 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 3717}
3718
963d8fe5 3719static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 3720 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 3721 .rpc_call_done = nfs4_close_done,
3722 .rpc_release = nfs4_free_closedata,
3723};
3724
1da177e4
LT		 3725/*
3726 * It is possible for data to be read/written from a mem-mapped file
3727 * after the sys_close call (which hits the vfs layer as a flush).
3728 * This means that we can't safely call nfsv4 close on a file until
3729 * the inode is cleared. This in turn means that we are not good
3730 * NFSv4 citizens - we do not indicate to the server to update the file's
3731 * share state even when we are done with one of the three share
3732 * stateid's in the inode.
3733 *
3734 * NOTE: Caller must be holding the sp->so_owner semaphore!
3735 */
1f7977c1 3736int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 3737{
4a35bd41 3738 struct nfs_server *server = NFS_SERVER(state->inode);
63f5f796 3739 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
1da177e4 3740 struct nfs4_closedata *calldata;
b39e625b
TM		 3741 struct nfs4_state_owner *sp = state->owner;
3742 struct rpc_task *task;
5138fde0
TM		 3743 struct rpc_message msg = {
3744 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
3745 .rpc_cred = state->owner->so_cred,
3746 };
c970aa85
TM		 3747 struct rpc_task_setup task_setup_data = {
3748 .rpc_client = server->client,
5138fde0 3749 .rpc_message = &msg,
c970aa85 3750 .callback_ops = &nfs4_close_ops,
101070ca 3751 .workqueue = nfsiod_workqueue,
61296507 3752 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF,
c970aa85 3753 };
9512135d 3754 int status = -ENOMEM;
1da177e4 3755
85e39fee
OK		 3756 if (server->nfs_client->cl_minorversion)
3757 task_setup_data.flags |= RPC_TASK_MOVEABLE;
3758
fa940720
WAA		 3759 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
3760 &task_setup_data.rpc_client, &msg);
3761
8535b2be 3762 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 3763 if (calldata == NULL)
9512135d 3764 goto out;
fba83f34 3765 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1, 0);
4a35bd41 3766 calldata->inode = state->inode;
1da177e4 3767 calldata->state = state;
4a35bd41 3768 calldata->arg.fh = NFS_FH(state->inode);
c82bac6f
TM		 3769 if (!nfs4_copy_open_stateid(&calldata->arg.stateid, state))
3770 goto out_free_calldata;
1da177e4 3771 /* Serialization for the sequence id */
63f5f796
TM		 3772 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
3773 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask);
badc76dd 3774 if (IS_ERR(calldata->arg.seqid))
9512135d 3775 goto out_free_calldata;
d8d84983 3776 nfs_fattr_init(&calldata->fattr);
dc0b027d 3777 calldata->arg.fmode = 0;
4d796d75 3778 calldata->lr.arg.ld_private = &calldata->lr.ld_private;
516a6af6 3779 calldata->res.fattr = &calldata->fattr;
c1d51931 3780 calldata->res.seqid = calldata->arg.seqid;
516a6af6 3781 calldata->res.server = server;
cf805165 3782 calldata->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
1c5bd76d
TM		 3783 calldata->lr.roc = pnfs_roc(state->inode,
3784 &calldata->lr.arg, &calldata->lr.res, msg.rpc_cred);
3785 if (calldata->lr.roc) {
3786 calldata->arg.lr_args = &calldata->lr.arg;
3787 calldata->res.lr_res = &calldata->lr.res;
3788 }
643168c2 3789 nfs_sb_active(calldata->inode->i_sb);
9512135d 3790
1174dd1f
TM		 3791 msg.rpc_argp = &calldata->arg;
3792 msg.rpc_resp = &calldata->res;
c970aa85
TM		 3793 task_setup_data.callback_data = calldata;
3794 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 3795 if (IS_ERR(task))
3796 return PTR_ERR(task);
a49c3c77
TM		 3797 status = 0;
3798 if (wait)
3799 status = rpc_wait_for_completion_task(task);
b39e625b 3800 rpc_put_task(task);
a49c3c77 3801 return status;
9512135d
TM		 3802out_free_calldata:
3803 kfree(calldata);
3804out:
b39e625b
TM		 3805 nfs4_put_open_state(state);
3806 nfs4_put_state_owner(sp);
9512135d 3807 return status;
1da177e4
LT		 3808}
3809
2b484297 3810static struct inode *
5bc2afc2
TM		 3811nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
3812 int open_flags, struct iattr *attr, int *opened)
1da177e4 3813{
1da177e4 3814 struct nfs4_state *state;
aa9c2669
DQ		 3815 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
3816
3817 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
1da177e4 3818
565277f6 3819 /* Protect against concurrent sillydeletes */
5bc2afc2 3820 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
aa9c2669
DQ		 3821
3822 nfs4_label_release_security(label);
3823
f46e0bd3
TM		 3824 if (IS_ERR(state))
3825 return ERR_CAST(state);
275bb307 3826 return state->inode;
1da177e4
LT		 3827}
3828
1185a552 3829static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 3830{
3831 if (ctx->state == NULL)
3832 return;
3833 if (is_sync)
1bf85d8c 3834 nfs4_close_sync(ctx->state, _nfs4_ctx_to_openmode(ctx));
7fe5c398 3835 else
1bf85d8c 3836 nfs4_close_state(ctx->state, _nfs4_ctx_to_openmode(ctx));
7fe5c398 3837}
1da177e4 3838
b944dba3
TM		 3839#define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
3840#define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
b78ef845 3841#define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_XATTR_SUPPORT - 1UL)
b944dba3 3842
1da177e4
LT		 3843static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
3844{
8c61282f 3845 u32 bitmask[3] = {}, minorversion = server->nfs_client->cl_minorversion;
43652ad5
BH		 3846 struct nfs4_server_caps_arg args = {
3847 .fhandle = fhandle,
8c61282f 3848 .bitmask = bitmask,
43652ad5 3849 };
1da177e4
LT		 3850 struct nfs4_server_caps_res res = {};
3851 struct rpc_message msg = {
3852 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 3853 .rpc_argp = &args,
1da177e4
LT		 3854 .rpc_resp = &res,
3855 };
3856 int status;
f4b23de3 3857 int i;
1da177e4 3858
8c61282f
KM		 3859 bitmask[0] = FATTR4_WORD0_SUPPORTED_ATTRS |
3860 FATTR4_WORD0_FH_EXPIRE_TYPE |
3861 FATTR4_WORD0_LINK_SUPPORT |
3862 FATTR4_WORD0_SYMLINK_SUPPORT |
3863 FATTR4_WORD0_ACLSUPPORT;
3864 if (minorversion)
3865 bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3866
7c513058 3867 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3868 if (status == 0) {
b944dba3 3869 /* Sanity check the server answers */
8c61282f 3870 switch (minorversion) {
b944dba3
TM		 3871 case 0:
3872 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
3873 res.attr_bitmask[2] = 0;
3874 break;
3875 case 1:
3876 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
3877 break;
3878 case 2:
3879 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
3880 }
1da177e4 3881 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
ce62b114
TM		 3882 server->caps &= ~(NFS_CAP_ACLS | NFS_CAP_HARDLINKS |
3883 NFS_CAP_SYMLINKS| NFS_CAP_SECURITY_LABEL);
3884 server->fattr_valid = NFS_ATTR_FATTR_V4;
7dd7d959
MN		 3885 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
3886 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
1da177e4
LT		 3887 server->caps |= NFS_CAP_ACLS;
3888 if (res.has_links != 0)
3889 server->caps |= NFS_CAP_HARDLINKS;
3890 if (res.has_symlinks != 0)
3891 server->caps |= NFS_CAP_SYMLINKS;
0b4f132b
SM		 3892#ifdef CONFIG_NFS_V4_SECURITY_LABEL
3893 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
3894 server->caps |= NFS_CAP_SECURITY_LABEL;
3895#endif
ce62b114
TM		 3896 if (!(res.attr_bitmask[0] & FATTR4_WORD0_FILEID))
3897 server->fattr_valid &= ~NFS_ATTR_FATTR_FILEID;
3898 if (!(res.attr_bitmask[1] & FATTR4_WORD1_MODE))
3899 server->fattr_valid &= ~NFS_ATTR_FATTR_MODE;
3900 if (!(res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS))
3901 server->fattr_valid &= ~NFS_ATTR_FATTR_NLINK;
3902 if (!(res.attr_bitmask[1] & FATTR4_WORD1_OWNER))
3903 server->fattr_valid &= ~(NFS_ATTR_FATTR_OWNER |
3904 NFS_ATTR_FATTR_OWNER_NAME);
3905 if (!(res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP))
3906 server->fattr_valid &= ~(NFS_ATTR_FATTR_GROUP |
3907 NFS_ATTR_FATTR_GROUP_NAME);
3908 if (!(res.attr_bitmask[1] & FATTR4_WORD1_SPACE_USED))
3909 server->fattr_valid &= ~NFS_ATTR_FATTR_SPACE_USED;
3910 if (!(res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS))
3911 server->fattr_valid &= ~NFS_ATTR_FATTR_ATIME;
3912 if (!(res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA))
3913 server->fattr_valid &= ~NFS_ATTR_FATTR_CTIME;
3914 if (!(res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY))
3915 server->fattr_valid &= ~NFS_ATTR_FATTR_MTIME;
aa9c2669
DQ		 3916 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
3917 sizeof(server->attr_bitmask));
b944dba3 3918 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
62ab460c 3919
a65318bf
TM		 3920 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
3921 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
3922 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
b944dba3 3923 server->cache_consistency_bitmask[2] = 0;
f4b23de3
TM		 3924
3925 /* Avoid a regression due to buggy server */
3926 for (i = 0; i < ARRAY_SIZE(res.exclcreat_bitmask); i++)
3927 res.exclcreat_bitmask[i] &= res.attr_bitmask[i];
8c61282f
KM		 3928 memcpy(server->exclcreat_bitmask, res.exclcreat_bitmask,
3929 sizeof(server->exclcreat_bitmask));
f4b23de3 3930
1da177e4 3931 server->acl_bitmask = res.acl_bitmask;
264e6351 3932 server->fh_expire_type = res.fh_expire_type;
1da177e4 3933 }
cccef3b9 3934
1da177e4
LT		 3935 return status;
3936}
3937
55a97593 3938int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4 3939{
0688e64b
TM		 3940 struct nfs4_exception exception = {
3941 .interruptible = true,
3942 };
1da177e4
LT		 3943 int err;
3944 do {
3945 err = nfs4_handle_exception(server,
3946 _nfs4_server_capabilities(server, fhandle),
3947 &exception);
3948 } while (exception.retry);
3949 return err;
3950}
3951
3952static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3953 struct nfs_fsinfo *info)
3954{
aa9c2669 3955 u32 bitmask[3];
1da177e4 3956 struct nfs4_lookup_root_arg args = {
aa9c2669 3957 .bitmask = bitmask,
1da177e4
LT		 3958 };
3959 struct nfs4_lookup_res res = {
3960 .server = server,
0e574af1 3961 .fattr = info->fattr,
1da177e4
LT		 3962 .fh = fhandle,
3963 };
3964 struct rpc_message msg = {
3965 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
3966 .rpc_argp = &args,
3967 .rpc_resp = &res,
3968 };
008f55d0 3969
aa9c2669
DQ		 3970 bitmask[0] = nfs4_fattr_bitmap[0];
3971 bitmask[1] = nfs4_fattr_bitmap[1];
3972 /*
3973 * Process the label in the upcoming getfattr
3974 */
3975 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
3976
0e574af1 3977 nfs_fattr_init(info->fattr);
7c513058 3978 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3979}
3980
3981static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3982 struct nfs_fsinfo *info)
3983{
0688e64b
TM		 3984 struct nfs4_exception exception = {
3985 .interruptible = true,
3986 };
1da177e4
LT		 3987 int err;
3988 do {
fb8a5ba8 3989 err = _nfs4_lookup_root(server, fhandle, info);
b5f875a9 3990 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
fb8a5ba8
BS		 3991 switch (err) {
3992 case 0:
3993 case -NFS4ERR_WRONGSEC:
05e9cfb4 3994 goto out;
fb8a5ba8
BS		 3995 default:
3996 err = nfs4_handle_exception(server, err, &exception);
3997 }
1da177e4 3998 } while (exception.retry);
05e9cfb4 3999out:
1da177e4
LT		 4000 return err;
4001}
4002
8f70e95f
BS		 4003static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
4004 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
4005{
c2190661
TM		 4006 struct rpc_auth_create_args auth_args = {
4007 .pseudoflavor = flavor,
4008 };
8f70e95f 4009 struct rpc_auth *auth;
8f70e95f 4010
c2190661 4011 auth = rpcauth_create(&auth_args, server->client);
9df1336c
AS		 4012 if (IS_ERR(auth))
4013 return -EACCES;
4014 return nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 4015}
4016
9a744ba3
CL		 4017/*
4018 * Retry pseudoroot lookup with various security flavors. We do this when:
4019 *
4020 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
4021 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
4022 *
4023 * Returns zero on success, or a negative NFS4ERR value, or a
4024 * negative errno value.
4025 */
801a16dc 4026static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 4027 struct nfs_fsinfo *info)
1da177e4 4028{
9a744ba3
CL		 4029 /* Per 3530bis 15.33.5 */
4030 static const rpc_authflavor_t flav_array[] = {
4031 RPC_AUTH_GSS_KRB5P,
4032 RPC_AUTH_GSS_KRB5I,
4033 RPC_AUTH_GSS_KRB5,
c4eafe11 4034 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 4035 RPC_AUTH_NULL,
4036 };
4037 int status = -EPERM;
4038 size_t i;
6a1a1e34 4039
4d4b69dd
WAA		 4040 if (server->auth_info.flavor_len > 0) {
4041 /* try each flavor specified by user */
4042 for (i = 0; i < server->auth_info.flavor_len; i++) {
4043 status = nfs4_lookup_root_sec(server, fhandle, info,
4044 server->auth_info.flavors[i]);
4045 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
4046 continue;
4047 break;
4048 }
4049 } else {
4050 /* no flavors specified by user, try default list */
4051 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
4052 status = nfs4_lookup_root_sec(server, fhandle, info,
4053 flav_array[i]);
4054 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
4055 continue;
4056 break;
4057 }
8f70e95f 4058 }
9a744ba3 4059
fb8a5ba8 4060 /*
d3787af2 4061 * -EACCES could mean that the user doesn't have correct permissions
fb8a5ba8
BS		 4062 * to access the mount. It could also mean that we tried to mount
4063 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
4064 * existing mount programs don't handle -EACCES very well so it should
4065 * be mapped to -EPERM instead.
4066 */
4067 if (status == -EACCES)
4068 status = -EPERM;
801a16dc
BS		 4069 return status;
4070}
4071
2ed4b95b
CL		 4072/**
4073 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
4074 * @server: initialized nfs_server handle
4075 * @fhandle: we fill in the pseudo-fs root file handle
4076 * @info: we fill in an FSINFO struct
5e6b1990 4077 * @auth_probe: probe the auth flavours
2ed4b95b
CL		 4078 *
4079 * Returns zero on success, or a negative errno.
801a16dc 4080 */
3028eb2b 4081int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
5e6b1990
TM		 4082 struct nfs_fsinfo *info,
4083 bool auth_probe)
801a16dc 4084{
c7757074 4085 int status = 0;
2ed4b95b 4086
c7757074 4087 if (!auth_probe)
5e6b1990 4088 status = nfs4_lookup_root(server, fhandle, info);
c7757074
AP		 4089
4090 if (auth_probe || status == NFS4ERR_WRONGSEC)
698c937b
TM		 4091 status = server->nfs_client->cl_mvops->find_root_sec(server,
4092 fhandle, info);
2ed4b95b 4093
1da177e4
LT		 4094 if (status == 0)
4095 status = nfs4_server_capabilities(server, fhandle);
4096 if (status == 0)
4097 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 4098
c12e87f4 4099 return nfs4_map_errors(status);
1da177e4
LT		 4100}
4101
bae36241
BS		 4102static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
4103 struct nfs_fsinfo *info)
4104{
4105 int error;
4106 struct nfs_fattr *fattr = info->fattr;
779df6a5 4107 struct nfs4_label *label = fattr->label;
bae36241
BS		 4108
4109 error = nfs4_server_capabilities(server, mntfh);
4110 if (error < 0) {
4111 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
4112 return error;
4113 }
4114
a841b54d 4115 error = nfs4_proc_getattr(server, mntfh, fattr, label, NULL);
bae36241
BS		 4116 if (error < 0) {
4117 dprintk("nfs4_get_root: getattr error = %d\n", -error);
779df6a5 4118 goto out;
bae36241
BS		 4119 }
4120
4121 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
4122 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
4123 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
4124
779df6a5 4125out:
bae36241
BS		 4126 return error;
4127}
4128
6b97fd3d
MN		 4129/*
4130 * Get locations and (maybe) other attributes of a referral.
4131 * Note that we'll actually follow the referral later when
4132 * we detect fsid mismatch in inode revalidation
4133 */
f05d147f
BS		 4134static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
4135 const struct qstr *name, struct nfs_fattr *fattr,
4136 struct nfs_fh *fhandle)
6b97fd3d
MN		 4137{
4138 int status = -ENOMEM;
4139 struct page *page = NULL;
4140 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 4141
4142 page = alloc_page(GFP_KERNEL);
4143 if (page == NULL)
4144 goto out;
4145 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
4146 if (locations == NULL)
4147 goto out;
4148
f05d147f 4149 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 4150 if (status != 0)
4151 goto out;
519ae255
CL		 4152
4153 /*
4154 * If the fsid didn't change, this is a migration event, not a
4155 * referral. Cause us to drop into the exception handler, which
4156 * will kick off migration recovery.
4157 */
6b97fd3d 4158 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 4159 dprintk("%s: server did not return a different fsid for"
4160 " a referral at %s\n", __func__, name->name);
519ae255 4161 status = -NFS4ERR_MOVED;
6b97fd3d
MN		 4162 goto out;
4163 }
533eb461
AA		 4164 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
4165 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 4166
533eb461 4167 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 4168 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 4169 memset(fhandle, 0, sizeof(struct nfs_fh));
4170out:
4171 if (page)
4172 __free_page(page);
5d7ca35a 4173 kfree(locations);
6b97fd3d
MN		 4174 return status;
4175}
4176
1775fd3e 4177static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
a841b54d
TM		 4178 struct nfs_fattr *fattr, struct nfs4_label *label,
4179 struct inode *inode)
1da177e4 4180{
771734f2 4181 __u32 bitmask[NFS4_BITMASK_SZ];
1da177e4
LT		 4182 struct nfs4_getattr_arg args = {
4183 .fh = fhandle,
771734f2 4184 .bitmask = bitmask,
1da177e4
LT		 4185 };
4186 struct nfs4_getattr_res res = {
4187 .fattr = fattr,
1775fd3e 4188 .label = label,
1da177e4
LT		 4189 .server = server,
4190 };
4191 struct rpc_message msg = {
4192 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
4193 .rpc_argp = &args,
4194 .rpc_resp = &res,
4195 };
c74dfe97
TM		 4196 unsigned short task_flags = 0;
4197
85e39fee
OK		 4198 if (nfs4_has_session(server->nfs_client))
4199 task_flags = RPC_TASK_MOVEABLE;
4200
c74dfe97
TM		 4201 /* Is this is an attribute revalidation, subject to softreval? */
4202 if (inode && (server->flags & NFS_MOUNT_SOFTREVAL))
4203 task_flags |= RPC_TASK_TIMEOUT;
aa9c2669 4204
a71029b8 4205 nfs4_bitmap_copy_adjust(bitmask, nfs4_bitmask(server, label), inode, 0);
0e574af1 4206 nfs_fattr_init(fattr);
c74dfe97
TM		 4207 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0);
4208 return nfs4_do_call_sync(server->client, server, &msg,
4209 &args.seq_args, &res.seq_res, task_flags);
1da177e4
LT		 4210}
4211
ec4b0925 4212int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
a841b54d
TM		 4213 struct nfs_fattr *fattr, struct nfs4_label *label,
4214 struct inode *inode)
1da177e4 4215{
0688e64b
TM		 4216 struct nfs4_exception exception = {
4217 .interruptible = true,
4218 };
1da177e4
LT		 4219 int err;
4220 do {
a841b54d 4221 err = _nfs4_proc_getattr(server, fhandle, fattr, label, inode);
b5f875a9
TM		 4222 trace_nfs4_getattr(server, fhandle, fattr, err);
4223 err = nfs4_handle_exception(server, err,
1da177e4
LT		 4224 &exception);
4225 } while (exception.retry);
4226 return err;
4227}
4228
4229/*
4230 * The file is not closed if it is opened due to the a request to change
4231 * the size of the file. The open call will not be needed once the
4232 * VFS layer lookup-intents are implemented.
4233 *
4234 * Close is called when the inode is destroyed.
4235 * If we haven't opened the file for O_WRONLY, we
4236 * need to in the size_change case to obtain a stateid.
4237 *
4238 * Got race?
4239 * Because OPEN is always done by name in nfsv4, it is
4240 * possible that we opened a different file by the same
4241 * name. We can recognize this race condition, but we
4242 * can't do anything about it besides returning an error.
4243 *
4244 * This will be fixed with VFS changes (lookup-intent).
4245 */
4246static int
4247nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
4248 struct iattr *sattr)
4249{
2b0143b5 4250 struct inode *inode = d_inode(dentry);
a52458b4 4251 const struct cred *cred = NULL;
29b59f94 4252 struct nfs_open_context *ctx = NULL;
14c43f76 4253 struct nfs4_label *label = NULL;
1da177e4
LT		 4254 int status;
4255
88ac815c
PT		 4256 if (pnfs_ld_layoutret_on_setattr(inode) &&
4257 sattr->ia_valid & ATTR_SIZE &&
4258 sattr->ia_size < i_size_read(inode))
24028672 4259 pnfs_commit_and_return_layout(inode);
8a1636c4 4260
0e574af1 4261 nfs_fattr_init(fattr);
1da177e4 4262
2669940d
AA		 4263 /* Deal with open(O_TRUNC) */
4264 if (sattr->ia_valid & ATTR_OPEN)
cc7936f9 4265 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2669940d
AA		 4266
4267 /* Optimization: if the end result is no change, don't RPC */
cc7936f9 4268 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2669940d
AA		 4269 return 0;
4270
d530838b 4271 /* Search for an existing open(O_WRITE) file */
659bfcd6 4272 if (sattr->ia_valid & ATTR_FILE) {
659bfcd6
TM		 4273
4274 ctx = nfs_file_open_context(sattr->ia_file);
29b59f94 4275 if (ctx)
504e5189 4276 cred = ctx->cred;
659bfcd6 4277 }
08e9eac4 4278
14c43f76
DQ		 4279 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
4280 if (IS_ERR(label))
4281 return PTR_ERR(label);
4282
199366f0
TM		 4283 /* Return any delegations if we're going to change ACLs */
4284 if ((sattr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0)
c01d3645 4285 nfs4_inode_make_writeable(inode);
199366f0 4286
29b59f94 4287 status = nfs4_do_setattr(inode, cred, fattr, sattr, ctx, NULL, label);
aa9c2669 4288 if (status == 0) {
f044636d 4289 nfs_setattr_update_inode(inode, sattr, fattr);
aa9c2669
DQ		 4290 nfs_setsecurity(inode, fattr, label);
4291 }
14c43f76 4292 nfs4_label_free(label);
1da177e4
LT		 4293 return status;
4294}
4295
0c2e53f1 4296static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
f7b37b8b 4297 struct dentry *dentry, struct nfs_fh *fhandle,
1775fd3e 4298 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 4299{
0c2e53f1 4300 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 4301 int status;
4302 struct nfs4_lookup_arg args = {
4303 .bitmask = server->attr_bitmask,
0c2e53f1 4304 .dir_fh = NFS_FH(dir),
f7b37b8b 4305 .name = &dentry->d_name,
2b3de441
DH		 4306 };
4307 struct nfs4_lookup_res res = {
4308 .server = server,
4309 .fattr = fattr,
aa9c2669 4310 .label = label,
2b3de441
DH		 4311 .fh = fhandle,
4312 };
4313 struct rpc_message msg = {
4314 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
4315 .rpc_argp = &args,
4316 .rpc_resp = &res,
4317 };
f7b37b8b
TM		 4318 unsigned short task_flags = 0;
4319
85e39fee
OK		 4320 if (server->nfs_client->cl_minorversion)
4321 task_flags = RPC_TASK_MOVEABLE;
4322
f7b37b8b
TM		 4323 /* Is this is an attribute revalidation, subject to softreval? */
4324 if (nfs_lookup_is_soft_revalidate(dentry))
4325 task_flags |= RPC_TASK_TIMEOUT;
2b3de441 4326
aa9c2669
DQ		 4327 args.bitmask = nfs4_bitmask(server, label);
4328
2b3de441
DH		 4329 nfs_fattr_init(fattr);
4330
f7b37b8b
TM		 4331 dprintk("NFS call lookup %pd2\n", dentry);
4332 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0);
4333 status = nfs4_do_call_sync(clnt, server, &msg,
4334 &args.seq_args, &res.seq_res, task_flags);
1da177e4
LT		 4335 dprintk("NFS reply lookup: %d\n", status);
4336 return status;
4337}
4338
72de53ec 4339static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 4340{
7ebb9315 4341 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 4342 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 4343 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4344 fattr->nlink = 2;
4345}
4346
72de53ec 4347static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
f7b37b8b 4348 struct dentry *dentry, struct nfs_fh *fhandle,
1775fd3e 4349 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4 4350{
0688e64b
TM		 4351 struct nfs4_exception exception = {
4352 .interruptible = true,
4353 };
72de53ec 4354 struct rpc_clnt *client = *clnt;
f7b37b8b 4355 const struct qstr *name = &dentry->d_name;
1da177e4
LT		 4356 int err;
4357 do {
f7b37b8b 4358 err = _nfs4_proc_lookup(client, dir, dentry, fhandle, fattr, label);
078ea3df 4359 trace_nfs4_lookup(dir, name, err);
72de53ec 4360 switch (err) {
08ef7bd3 4361 case -NFS4ERR_BADNAME:
72de53ec
BS		 4362 err = -ENOENT;
4363 goto out;
0c2e53f1 4364 case -NFS4ERR_MOVED:
f05d147f 4365 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
c86c90c6
DM		 4366 if (err == -NFS4ERR_MOVED)
4367 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
72de53ec 4368 goto out;
0c2e53f1 4369 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 4370 err = -EPERM;
4371 if (client != *clnt)
4372 goto out;
66b06860 4373 client = nfs4_negotiate_security(client, dir, name);
72de53ec
BS		 4374 if (IS_ERR(client))
4375 return PTR_ERR(client);
4376
4377 exception.retry = 1;
4378 break;
4379 default:
4380 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 4381 }
1da177e4 4382 } while (exception.retry);
72de53ec
BS		 4383
4384out:
4385 if (err == 0)
4386 *clnt = client;
4387 else if (client != *clnt)
4388 rpc_shutdown_client(client);
4389
1da177e4
LT		 4390 return err;
4391}
4392
f7b37b8b 4393static int nfs4_proc_lookup(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 4394 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
4395 struct nfs4_label *label)
72de53ec
BS		 4396{
4397 int status;
4398 struct rpc_clnt *client = NFS_CLIENT(dir);
4399
f7b37b8b 4400 status = nfs4_proc_lookup_common(&client, dir, dentry, fhandle, fattr, label);
72de53ec
BS		 4401 if (client != NFS_CLIENT(dir)) {
4402 rpc_shutdown_client(client);
4403 nfs_fixup_secinfo_attributes(fattr);
4404 }
4405 return status;
4406}
4407
f05d147f 4408struct rpc_clnt *
f7b37b8b 4409nfs4_proc_lookup_mountpoint(struct inode *dir, struct dentry *dentry,
f05d147f
BS		 4410 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
4411{
b72888cb 4412 struct rpc_clnt *client = NFS_CLIENT(dir);
f05d147f 4413 int status;
f05d147f 4414
f7b37b8b 4415 status = nfs4_proc_lookup_common(&client, dir, dentry, fhandle, fattr, NULL);
b72888cb 4416 if (status < 0)
f05d147f 4417 return ERR_PTR(status);
b72888cb 4418 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
f05d147f
BS		 4419}
4420
5b5faaf6
JL		 4421static int _nfs4_proc_lookupp(struct inode *inode,
4422 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
4423 struct nfs4_label *label)
4424{
4425 struct rpc_clnt *clnt = NFS_CLIENT(inode);
4426 struct nfs_server *server = NFS_SERVER(inode);
4427 int status;
4428 struct nfs4_lookupp_arg args = {
4429 .bitmask = server->attr_bitmask,
4430 .fh = NFS_FH(inode),
4431 };
4432 struct nfs4_lookupp_res res = {
4433 .server = server,
4434 .fattr = fattr,
4435 .label = label,
4436 .fh = fhandle,
4437 };
4438 struct rpc_message msg = {
4439 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUPP],
4440 .rpc_argp = &args,
4441 .rpc_resp = &res,
4442 };
76998ebb
TM		 4443 unsigned short task_flags = 0;
4444
4445 if (NFS_SERVER(inode)->flags & NFS_MOUNT_SOFTREVAL)
4446 task_flags |= RPC_TASK_TIMEOUT;
5b5faaf6
JL		 4447
4448 args.bitmask = nfs4_bitmask(server, label);
4449
4450 nfs_fattr_init(fattr);
4451
4452 dprintk("NFS call lookupp ino=0x%lx\n", inode->i_ino);
4453 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
76998ebb 4454 &res.seq_res, task_flags);
5b5faaf6
JL		 4455 dprintk("NFS reply lookupp: %d\n", status);
4456 return status;
4457}
4458
4459static int nfs4_proc_lookupp(struct inode *inode, struct nfs_fh *fhandle,
4460 struct nfs_fattr *fattr, struct nfs4_label *label)
4461{
0688e64b
TM		 4462 struct nfs4_exception exception = {
4463 .interruptible = true,
4464 };
5b5faaf6
JL		 4465 int err;
4466 do {
4467 err = _nfs4_proc_lookupp(inode, fhandle, fattr, label);
4468 trace_nfs4_lookupp(inode, err);
4469 err = nfs4_handle_exception(NFS_SERVER(inode), err,
4470 &exception);
4471 } while (exception.retry);
4472 return err;
4473}
4474
1da177e4
LT		 4475static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
4476{
76b32999 4477 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 4478 struct nfs4_accessargs args = {
4479 .fh = NFS_FH(inode),
1750d929 4480 .access = entry->mask,
76b32999
TM		 4481 };
4482 struct nfs4_accessres res = {
4483 .server = server,
1da177e4 4484 };
1da177e4
LT		 4485 struct rpc_message msg = {
4486 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
4487 .rpc_argp = &args,
4488 .rpc_resp = &res,
4489 .rpc_cred = entry->cred,
4490 };
aa9c2669 4491 int status = 0;
1da177e4 4492
7c672654 4493 if (!nfs4_have_delegation(inode, FMODE_READ)) {
8bcbe7d9
TM		 4494 res.fattr = nfs_alloc_fattr();
4495 if (res.fattr == NULL)
4496 return -ENOMEM;
4497 args.bitmask = server->cache_consistency_bitmask;
4498 }
7c513058 4499 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 4500 if (!status) {
6168f62c 4501 nfs_access_set_mask(entry, res.access);
8bcbe7d9
TM		 4502 if (res.fattr)
4503 nfs_refresh_inode(inode, res.fattr);
1da177e4 4504 }
c407d41a 4505 nfs_free_fattr(res.fattr);
1da177e4
LT		 4506 return status;
4507}
4508
4509static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
4510{
0688e64b
TM		 4511 struct nfs4_exception exception = {
4512 .interruptible = true,
4513 };
1da177e4
LT		 4514 int err;
4515 do {
c1578b76
TM		 4516 err = _nfs4_proc_access(inode, entry);
4517 trace_nfs4_access(inode, err);
4518 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 4519 &exception);
4520 } while (exception.retry);
4521 return err;
4522}
4523
4524/*
4525 * TODO: For the time being, we don't try to get any attributes
4526 * along with any of the zero-copy operations READ, READDIR,
4527 * READLINK, WRITE.
4528 *
4529 * In the case of the first three, we want to put the GETATTR
4530 * after the read-type operation -- this is because it is hard
4531 * to predict the length of a GETATTR response in v4, and thus
4532 * align the READ data correctly. This means that the GETATTR
4533 * may end up partially falling into the page cache, and we should
4534 * shift it into the 'tail' of the xdr_buf before processing.
4535 * To do this efficiently, we need to know the total length
4536 * of data received, which doesn't seem to be available outside
4537 * of the RPC layer.
4538 *
4539 * In the case of WRITE, we also want to put the GETATTR after
4540 * the operation -- in this case because we want to make sure
140150db 4541 * we get the post-operation mtime and size.
1da177e4
LT		 4542 *
4543 * Both of these changes to the XDR layer would in fact be quite
4544 * minor, but I decided to leave them for a subsequent patch.
4545 */
4546static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
4547 unsigned int pgbase, unsigned int pglen)
4548{
4549 struct nfs4_readlink args = {
4550 .fh = NFS_FH(inode),
4551 .pgbase = pgbase,
4552 .pglen = pglen,
4553 .pages = &page,
4554 };
f50c7000 4555 struct nfs4_readlink_res res;
1da177e4
LT		 4556 struct rpc_message msg = {
4557 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
4558 .rpc_argp = &args,
f50c7000 4559 .rpc_resp = &res,
1da177e4
LT		 4560 };
4561
7c513058 4562 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4563}
4564
4565static int nfs4_proc_readlink(struct inode *inode, struct page *page,
4566 unsigned int pgbase, unsigned int pglen)
4567{
0688e64b
TM		 4568 struct nfs4_exception exception = {
4569 .interruptible = true,
4570 };
1da177e4
LT		 4571 int err;
4572 do {
c1578b76
TM		 4573 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
4574 trace_nfs4_readlink(inode, err);
4575 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 4576 &exception);
4577 } while (exception.retry);
4578 return err;
4579}
4580
1da177e4 4581/*
8867fe58 4582 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 4583 */
1da177e4
LT		 4584static int
4585nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 4586 int flags)
1da177e4 4587{
dff25ddb 4588 struct nfs_server *server = NFS_SERVER(dir);
aa9c2669 4589 struct nfs4_label l, *ilabel = NULL;
8867fe58 4590 struct nfs_open_context *ctx;
1da177e4 4591 struct nfs4_state *state;
1da177e4
LT		 4592 int status = 0;
4593
532d4def 4594 ctx = alloc_nfs_open_context(dentry, FMODE_READ, NULL);
8867fe58
MS		 4595 if (IS_ERR(ctx))
4596 return PTR_ERR(ctx);
4597
aa9c2669
DQ		 4598 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
4599
dff25ddb
AG		 4600 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
4601 sattr->ia_mode &= ~current_umask();
c5c3fb5f 4602 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, NULL);
1da177e4
LT		 4603 if (IS_ERR(state)) {
4604 status = PTR_ERR(state);
c0204fd2 4605 goto out;
1da177e4 4606 }
1da177e4 4607out:
aa9c2669 4608 nfs4_label_release_security(ilabel);
8867fe58 4609 put_nfs_open_context(ctx);
1da177e4
LT		 4610 return status;
4611}
4612
3c591175
TM		 4613static int
4614_nfs4_proc_remove(struct inode *dir, const struct qstr *name, u32 ftype)
1da177e4 4615{
16e42959 4616 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 4617 struct nfs_removeargs args = {
1da177e4 4618 .fh = NFS_FH(dir),
26fe5750 4619 .name = *name,
16e42959 4620 };
4fdc17b2 4621 struct nfs_removeres res = {
16e42959 4622 .server = server,
1da177e4 4623 };
1da177e4 4624 struct rpc_message msg = {
4fdc17b2
TM		 4625 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
4626 .rpc_argp = &args,
4627 .rpc_resp = &res,
1da177e4 4628 };
d3129ef6 4629 unsigned long timestamp = jiffies;
778d2817 4630 int status;
1da177e4 4631
7c513058 4632 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
3c591175
TM		 4633 if (status == 0) {
4634 spin_lock(&dir->i_lock);
3c591175
TM		 4635 /* Removing a directory decrements nlink in the parent */
4636 if (ftype == NF4DIR && dir->i_nlink > 2)
4637 nfs4_dec_nlink_locked(dir);
82eae5a4
TM		 4638 nfs4_update_changeattr_locked(dir, &res.cinfo, timestamp,
4639 NFS_INO_INVALID_DATA);
3c591175
TM		 4640 spin_unlock(&dir->i_lock);
4641 }
1da177e4
LT		 4642 return status;
4643}
4644
912678db 4645static int nfs4_proc_remove(struct inode *dir, struct dentry *dentry)
1da177e4 4646{
0688e64b
TM		 4647 struct nfs4_exception exception = {
4648 .interruptible = true,
4649 };
912678db 4650 struct inode *inode = d_inode(dentry);
1da177e4 4651 int err;
912678db 4652
c01d3645
TM		 4653 if (inode) {
4654 if (inode->i_nlink == 1)
4655 nfs4_inode_return_delegation(inode);
4656 else
4657 nfs4_inode_make_writeable(inode);
4658 }
912678db 4659 do {
3c591175 4660 err = _nfs4_proc_remove(dir, &dentry->d_name, NF4REG);
912678db
TM		 4661 trace_nfs4_remove(dir, &dentry->d_name, err);
4662 err = nfs4_handle_exception(NFS_SERVER(dir), err,
4663 &exception);
4664 } while (exception.retry);
4665 return err;
4666}
4667
4668static int nfs4_proc_rmdir(struct inode *dir, const struct qstr *name)
4669{
0688e64b
TM		 4670 struct nfs4_exception exception = {
4671 .interruptible = true,
4672 };
912678db
TM		 4673 int err;
4674
1da177e4 4675 do {
3c591175 4676 err = _nfs4_proc_remove(dir, name, NF4DIR);
078ea3df
TM		 4677 trace_nfs4_remove(dir, name, err);
4678 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4679 &exception);
4680 } while (exception.retry);
4681 return err;
4682}
4683
ed7e9ad0
TM		 4684static void nfs4_proc_unlink_setup(struct rpc_message *msg,
4685 struct dentry *dentry,
4686 struct inode *inode)
1da177e4 4687{
e4eff1a6
TM		 4688 struct nfs_removeargs *args = msg->rpc_argp;
4689 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 4690
977fcc2b 4691 res->server = NFS_SB(dentry->d_sb);
1da177e4 4692 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
fba83f34 4693 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1, 0);
aa9c2669
DQ		 4694
4695 nfs_fattr_init(res->dir_attr);
977fcc2b
TM		 4696
4697 if (inode)
4698 nfs4_inode_return_delegation(inode);
1da177e4
LT		 4699}
4700
34e137cc
BS		 4701static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
4702{
42e1cca7 4703 nfs4_setup_sequence(NFS_SB(data->dentry->d_sb)->nfs_client,
d9afbd1b
TM		 4704 &data->args.seq_args,
4705 &data->res.seq_res,
4706 task);
1da177e4
LT		 4707}
4708
e4eff1a6 4709static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 4710{
078ea3df
TM		 4711 struct nfs_unlinkdata *data = task->tk_calldata;
4712 struct nfs_removeres *res = &data->res;
e4eff1a6 4713
14516c3a
TM		 4714 if (!nfs4_sequence_done(task, &res->seq_res))
4715 return 0;
8478eaa1
N		 4716 if (nfs4_async_handle_error(task, res->server, NULL,
4717 &data->timeout) == -EAGAIN)
e4eff1a6 4718 return 0;
c40d52fe 4719 if (task->tk_status == 0)
1b523ca9
FL		 4720 nfs4_update_changeattr(dir, &res->cinfo,
4721 res->dir_attr->time_start,
4722 NFS_INO_INVALID_DATA);
e4eff1a6 4723 return 1;
1da177e4
LT		 4724}
4725
f2c2c552
TM		 4726static void nfs4_proc_rename_setup(struct rpc_message *msg,
4727 struct dentry *old_dentry,
4728 struct dentry *new_dentry)
d3d4152a 4729{
d3d4152a
JL		 4730 struct nfs_renameargs *arg = msg->rpc_argp;
4731 struct nfs_renameres *res = msg->rpc_resp;
f2c2c552
TM		 4732 struct inode *old_inode = d_inode(old_dentry);
4733 struct inode *new_inode = d_inode(new_dentry);
d3d4152a 4734
f2c2c552 4735 if (old_inode)
c01d3645 4736 nfs4_inode_make_writeable(old_inode);
f2c2c552
TM		 4737 if (new_inode)
4738 nfs4_inode_return_delegation(new_inode);
d3d4152a 4739 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
f2c2c552 4740 res->server = NFS_SB(old_dentry->d_sb);
fba83f34 4741 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1, 0);
d3d4152a
JL		 4742}
4743
c6bfa1a1
BS		 4744static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
4745{
42e1cca7 4746 nfs4_setup_sequence(NFS_SERVER(data->old_dir)->nfs_client,
d9afbd1b
TM		 4747 &data->args.seq_args,
4748 &data->res.seq_res,
4749 task);
d3d4152a
JL		 4750}
4751
4752static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
4753 struct inode *new_dir)
4754{
fbc6f7c2
TM		 4755 struct nfs_renamedata *data = task->tk_calldata;
4756 struct nfs_renameres *res = &data->res;
d3d4152a
JL		 4757
4758 if (!nfs4_sequence_done(task, &res->seq_res))
4759 return 0;
8478eaa1 4760 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
d3d4152a
JL		 4761 return 0;
4762
c733c49c 4763 if (task->tk_status == 0) {
5636ec4e
TM		 4764 if (new_dir != old_dir) {
4765 /* Note: If we moved a directory, nlink will change */
1b523ca9 4766 nfs4_update_changeattr(old_dir, &res->old_cinfo,
5636ec4e 4767 res->old_fattr->time_start,
fabf2b34 4768 NFS_INO_INVALID_NLINK |
1b523ca9
FL		 4769 NFS_INO_INVALID_DATA);
4770 nfs4_update_changeattr(new_dir, &res->new_cinfo,
5636ec4e 4771 res->new_fattr->time_start,
fabf2b34 4772 NFS_INO_INVALID_NLINK |
1b523ca9 4773 NFS_INO_INVALID_DATA);
5636ec4e 4774 } else
1b523ca9 4775 nfs4_update_changeattr(old_dir, &res->old_cinfo,
5636ec4e 4776 res->old_fattr->time_start,
1b523ca9 4777 NFS_INO_INVALID_DATA);
c733c49c 4778 }
d3d4152a
JL		 4779 return 1;
4780}
4781
beffb8fe 4782static int _nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name)
1da177e4 4783{
91ba2eee 4784 struct nfs_server *server = NFS_SERVER(inode);
2f28dc38 4785 __u32 bitmask[NFS4_BITMASK_SZ];
1da177e4
LT		 4786 struct nfs4_link_arg arg = {
4787 .fh = NFS_FH(inode),
4788 .dir_fh = NFS_FH(dir),
4789 .name = name,
2f28dc38 4790 .bitmask = bitmask,
91ba2eee 4791 };
91ba2eee
TM		 4792 struct nfs4_link_res res = {
4793 .server = server,
1775fd3e 4794 .label = NULL,
1da177e4 4795 };
1da177e4
LT		 4796 struct rpc_message msg = {
4797 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
4798 .rpc_argp = &arg,
91ba2eee 4799 .rpc_resp = &res,
1da177e4 4800 };
136f2627
TM		 4801 int status = -ENOMEM;
4802
4803 res.fattr = nfs_alloc_fattr();
778d2817 4804 if (res.fattr == NULL)
136f2627 4805 goto out;
1da177e4 4806
14c43f76
DQ		 4807 res.label = nfs4_label_alloc(server, GFP_KERNEL);
4808 if (IS_ERR(res.label)) {
4809 status = PTR_ERR(res.label);
4810 goto out;
4811 }
4812
c01d3645 4813 nfs4_inode_make_writeable(inode);
a71029b8
TM		 4814 nfs4_bitmap_copy_adjust(bitmask, nfs4_bitmask(server, res.label), inode,
4815 NFS_INO_INVALID_CHANGE);
7c513058 4816 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee 4817 if (!status) {
1b523ca9
FL		 4818 nfs4_update_changeattr(dir, &res.cinfo, res.fattr->time_start,
4819 NFS_INO_INVALID_DATA);
1301e421 4820 nfs4_inc_nlink(inode);
aa9c2669
DQ		 4821 status = nfs_post_op_update_inode(inode, res.fattr);
4822 if (!status)
4823 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 4824 }
14c43f76
DQ		 4825
4826
4827 nfs4_label_free(res.label);
4828
136f2627 4829out:
136f2627 4830 nfs_free_fattr(res.fattr);
1da177e4
LT		 4831 return status;
4832}
4833
beffb8fe 4834static int nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name)
1da177e4 4835{
0688e64b
TM		 4836 struct nfs4_exception exception = {
4837 .interruptible = true,
4838 };
1da177e4
LT		 4839 int err;
4840 do {
4841 err = nfs4_handle_exception(NFS_SERVER(inode),
4842 _nfs4_proc_link(inode, dir, name),
4843 &exception);
4844 } while (exception.retry);
4845 return err;
4846}
4847
57dc9a57
TM		 4848struct nfs4_createdata {
4849 struct rpc_message msg;
4850 struct nfs4_create_arg arg;
4851 struct nfs4_create_res res;
4852 struct nfs_fh fh;
4853 struct nfs_fattr fattr;
1775fd3e 4854 struct nfs4_label *label;
57dc9a57
TM		 4855};
4856
4857static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
beffb8fe 4858 const struct qstr *name, struct iattr *sattr, u32 ftype)
57dc9a57
TM		 4859{
4860 struct nfs4_createdata *data;
4861
4862 data = kzalloc(sizeof(*data), GFP_KERNEL);
4863 if (data != NULL) {
4864 struct nfs_server *server = NFS_SERVER(dir);
4865
14c43f76
DQ		 4866 data->label = nfs4_label_alloc(server, GFP_KERNEL);
4867 if (IS_ERR(data->label))
4868 goto out_free;
4869
57dc9a57
TM		 4870 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
4871 data->msg.rpc_argp = &data->arg;
4872 data->msg.rpc_resp = &data->res;
4873 data->arg.dir_fh = NFS_FH(dir);
4874 data->arg.server = server;
4875 data->arg.name = name;
4876 data->arg.attrs = sattr;
4877 data->arg.ftype = ftype;
aa9c2669 4878 data->arg.bitmask = nfs4_bitmask(server, data->label);
dff25ddb 4879 data->arg.umask = current_umask();
57dc9a57
TM		 4880 data->res.server = server;
4881 data->res.fh = &data->fh;
4882 data->res.fattr = &data->fattr;
1775fd3e 4883 data->res.label = data->label;
57dc9a57 4884 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 4885 }
4886 return data;
14c43f76
DQ		 4887out_free:
4888 kfree(data);
4889 return NULL;
57dc9a57
TM		 4890}
4891
4892static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
4893{
7c513058 4894 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 4895 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57 4896 if (status == 0) {
3c591175 4897 spin_lock(&dir->i_lock);
3c591175
TM		 4898 /* Creating a directory bumps nlink in the parent */
4899 if (data->arg.ftype == NF4DIR)
4900 nfs4_inc_nlink_locked(dir);
82eae5a4
TM		 4901 nfs4_update_changeattr_locked(dir, &data->res.dir_cinfo,
4902 data->res.fattr->time_start,
4903 NFS_INO_INVALID_DATA);
3c591175 4904 spin_unlock(&dir->i_lock);
1775fd3e 4905 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 4906 }
4907 return status;
4908}
4909
4910static void nfs4_free_createdata(struct nfs4_createdata *data)
4911{
14c43f76 4912 nfs4_label_free(data->label);
57dc9a57
TM		 4913 kfree(data);
4914}
4915
4f390c15 4916static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 4917 struct page *page, unsigned int len, struct iattr *sattr,
4918 struct nfs4_label *label)
1da177e4 4919{
57dc9a57
TM		 4920 struct nfs4_createdata *data;
4921 int status = -ENAMETOOLONG;
1da177e4 4922
94a6d753 4923 if (len > NFS4_MAXPATHLEN)
57dc9a57 4924 goto out;
4f390c15 4925
57dc9a57
TM		 4926 status = -ENOMEM;
4927 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
4928 if (data == NULL)
4929 goto out;
4930
4931 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
4932 data->arg.u.symlink.pages = &page;
4933 data->arg.u.symlink.len = len;
1775fd3e 4934 data->arg.label = label;
1da177e4 4935
57dc9a57
TM		 4936 status = nfs4_do_create(dir, dentry, data);
4937
4938 nfs4_free_createdata(data);
4939out:
1da177e4
LT		 4940 return status;
4941}
4942
4f390c15 4943static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 4944 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 4945{
0688e64b
TM		 4946 struct nfs4_exception exception = {
4947 .interruptible = true,
4948 };
aa9c2669 4949 struct nfs4_label l, *label = NULL;
1da177e4 4950 int err;
aa9c2669
DQ		 4951
4952 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4953
1da177e4 4954 do {
078ea3df
TM		 4955 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
4956 trace_nfs4_symlink(dir, &dentry->d_name, err);
4957 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4958 &exception);
4959 } while (exception.retry);
aa9c2669
DQ		 4960
4961 nfs4_label_release_security(label);
1da177e4
LT		 4962 return err;
4963}
4964
4965static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 4966 struct iattr *sattr, struct nfs4_label *label)
1da177e4 4967{
57dc9a57
TM		 4968 struct nfs4_createdata *data;
4969 int status = -ENOMEM;
1da177e4 4970
57dc9a57
TM		 4971 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
4972 if (data == NULL)
4973 goto out;
4974
1775fd3e 4975 data->arg.label = label;
57dc9a57
TM		 4976 status = nfs4_do_create(dir, dentry, data);
4977
4978 nfs4_free_createdata(data);
4979out:
1da177e4
LT		 4980 return status;
4981}
4982
4983static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
4984 struct iattr *sattr)
4985{
dff25ddb 4986 struct nfs_server *server = NFS_SERVER(dir);
0688e64b
TM		 4987 struct nfs4_exception exception = {
4988 .interruptible = true,
4989 };
aa9c2669 4990 struct nfs4_label l, *label = NULL;
1da177e4 4991 int err;
a8a5da99 4992
aa9c2669
DQ		 4993 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4994
dff25ddb
AG		 4995 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
4996 sattr->ia_mode &= ~current_umask();
1da177e4 4997 do {
078ea3df
TM		 4998 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
4999 trace_nfs4_mkdir(dir, &dentry->d_name, err);
5000 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 5001 &exception);
5002 } while (exception.retry);
aa9c2669
DQ		 5003 nfs4_label_release_security(label);
5004
1da177e4
LT		 5005 return err;
5006}
5007
82e22a5e
TM		 5008static int _nfs4_proc_readdir(struct nfs_readdir_arg *nr_arg,
5009 struct nfs_readdir_res *nr_res)
1da177e4 5010{
82e22a5e 5011 struct inode *dir = d_inode(nr_arg->dentry);
05ad9175 5012 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 5013 struct nfs4_readdir_arg args = {
5014 .fh = NFS_FH(dir),
82e22a5e 5015 .pages = nr_arg->pages,
1da177e4 5016 .pgbase = 0,
82e22a5e
TM		 5017 .count = nr_arg->page_len,
5018 .plus = nr_arg->plus,
1da177e4
LT		 5019 };
5020 struct nfs4_readdir_res res;
5021 struct rpc_message msg = {
5022 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
5023 .rpc_argp = &args,
5024 .rpc_resp = &res,
82e22a5e 5025 .rpc_cred = nr_arg->cred,
1da177e4
LT		 5026 };
5027 int status;
5028
82e22a5e
TM		 5029 dprintk("%s: dentry = %pd2, cookie = %llu\n", __func__,
5030 nr_arg->dentry, (unsigned long long)nr_arg->cookie);
05ad9175
OK		 5031 if (!(server->caps & NFS_CAP_SECURITY_LABEL))
5032 args.bitmask = server->attr_bitmask_nl;
5033 else
5034 args.bitmask = server->attr_bitmask;
5035
82e22a5e 5036 nfs4_setup_readdir(nr_arg->cookie, nr_arg->verf, nr_arg->dentry, &args);
1da177e4 5037 res.pgbase = args.pgbase;
05ad9175
OK		 5038 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
5039 &res.seq_res, 0);
ac396128 5040 if (status >= 0) {
82e22a5e 5041 memcpy(nr_res->verf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 5042 status += args.pgbase;
5043 }
c4812998
TM		 5044
5045 nfs_invalidate_atime(dir);
5046
3110ff80 5047 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 5048 return status;
5049}
5050
82e22a5e
TM		 5051static int nfs4_proc_readdir(struct nfs_readdir_arg *arg,
5052 struct nfs_readdir_res *res)
1da177e4 5053{
0688e64b
TM		 5054 struct nfs4_exception exception = {
5055 .interruptible = true,
5056 };
1da177e4
LT		 5057 int err;
5058 do {
82e22a5e
TM		 5059 err = _nfs4_proc_readdir(arg, res);
5060 trace_nfs4_readdir(d_inode(arg->dentry), err);
5061 err = nfs4_handle_exception(NFS_SERVER(d_inode(arg->dentry)),
5062 err, &exception);
1da177e4
LT		 5063 } while (exception.retry);
5064 return err;
5065}
5066
5067static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 5068 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 5069{
57dc9a57
TM		 5070 struct nfs4_createdata *data;
5071 int mode = sattr->ia_mode;
5072 int status = -ENOMEM;
1da177e4 5073
57dc9a57
TM		 5074 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
5075 if (data == NULL)
5076 goto out;
5077
1da177e4 5078 if (S_ISFIFO(mode))
57dc9a57 5079 data->arg.ftype = NF4FIFO;
1da177e4 5080 else if (S_ISBLK(mode)) {
57dc9a57
TM		 5081 data->arg.ftype = NF4BLK;
5082 data->arg.u.device.specdata1 = MAJOR(rdev);
5083 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 5084 }
5085 else if (S_ISCHR(mode)) {
57dc9a57
TM		 5086 data->arg.ftype = NF4CHR;
5087 data->arg.u.device.specdata1 = MAJOR(rdev);
5088 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 5089 } else if (!S_ISSOCK(mode)) {
5090 status = -EINVAL;
5091 goto out_free;
1da177e4 5092 }
1775fd3e 5093
aa9c2669 5094 data->arg.label = label;
57dc9a57 5095 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 5096out_free:
57dc9a57
TM		 5097 nfs4_free_createdata(data);
5098out:
1da177e4
LT		 5099 return status;
5100}
5101
5102static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
5103 struct iattr *sattr, dev_t rdev)
5104{
dff25ddb 5105 struct nfs_server *server = NFS_SERVER(dir);
0688e64b
TM		 5106 struct nfs4_exception exception = {
5107 .interruptible = true,
5108 };
aa9c2669 5109 struct nfs4_label l, *label = NULL;
1da177e4 5110 int err;
a8a5da99 5111
aa9c2669
DQ		 5112 label = nfs4_label_init_security(dir, dentry, sattr, &l);
5113
dff25ddb
AG		 5114 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
5115 sattr->ia_mode &= ~current_umask();
1da177e4 5116 do {
078ea3df
TM		 5117 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
5118 trace_nfs4_mknod(dir, &dentry->d_name, err);
5119 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 5120 &exception);
5121 } while (exception.retry);
aa9c2669
DQ		 5122
5123 nfs4_label_release_security(label);
5124
1da177e4
LT		 5125 return err;
5126}
5127
5128static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
5129 struct nfs_fsstat *fsstat)
5130{
5131 struct nfs4_statfs_arg args = {
5132 .fh = fhandle,
5133 .bitmask = server->attr_bitmask,
5134 };
24ad148a
BH		 5135 struct nfs4_statfs_res res = {
5136 .fsstat = fsstat,
5137 };
1da177e4
LT		 5138 struct rpc_message msg = {
5139 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
5140 .rpc_argp = &args,
24ad148a 5141 .rpc_resp = &res,
1da177e4
LT		 5142 };
5143
0e574af1 5144 nfs_fattr_init(fsstat->fattr);
7c513058 5145 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 5146}
5147
5148static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
5149{
0688e64b
TM		 5150 struct nfs4_exception exception = {
5151 .interruptible = true,
5152 };
1da177e4
LT		 5153 int err;
5154 do {
5155 err = nfs4_handle_exception(server,
5156 _nfs4_proc_statfs(server, fhandle, fsstat),
5157 &exception);
5158 } while (exception.retry);
5159 return err;
5160}
5161
5162static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
5163 struct nfs_fsinfo *fsinfo)
5164{
5165 struct nfs4_fsinfo_arg args = {
5166 .fh = fhandle,
5167 .bitmask = server->attr_bitmask,
5168 };
3dda5e43
BH		 5169 struct nfs4_fsinfo_res res = {
5170 .fsinfo = fsinfo,
5171 };
1da177e4
LT		 5172 struct rpc_message msg = {
5173 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
5174 .rpc_argp = &args,
3dda5e43 5175 .rpc_resp = &res,
1da177e4
LT		 5176 };
5177
7c513058 5178 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 5179}
5180
5181static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
5182{
0688e64b
TM		 5183 struct nfs4_exception exception = {
5184 .interruptible = true,
5185 };
1da177e4
LT		 5186 int err;
5187
5188 do {
83ca7f5a 5189 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
b5f875a9 5190 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
83ca7f5a 5191 if (err == 0) {
7dc2993a 5192 nfs4_set_lease_period(server->nfs_client, fsinfo->lease_time * HZ);
83ca7f5a
CL		 5193 break;
5194 }
5195 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 5196 } while (exception.retry);
5197 return err;
5198}
5199
5200static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
5201{
e38eb650
BS		 5202 int error;
5203
0e574af1 5204 nfs_fattr_init(fsinfo->fattr);
e38eb650 5205 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 5206 if (error == 0) {
5207 /* block layout checks this! */
5208 server->pnfs_blksize = fsinfo->blksize;
ca440c38 5209 set_pnfs_layoutdriver(server, fhandle, fsinfo);
dc182549 5210 }
e38eb650
BS		 5211
5212 return error;
1da177e4
LT		 5213}
5214
5215static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
5216 struct nfs_pathconf *pathconf)
5217{
5218 struct nfs4_pathconf_arg args = {
5219 .fh = fhandle,
5220 .bitmask = server->attr_bitmask,
5221 };
d45b2989
BH		 5222 struct nfs4_pathconf_res res = {
5223 .pathconf = pathconf,
5224 };
1da177e4
LT		 5225 struct rpc_message msg = {
5226 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
5227 .rpc_argp = &args,
d45b2989 5228 .rpc_resp = &res,
1da177e4
LT		 5229 };
5230
5231 /* None of the pathconf attributes are mandatory to implement */
5232 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
5233 memset(pathconf, 0, sizeof(*pathconf));
5234 return 0;
5235 }
5236
0e574af1 5237 nfs_fattr_init(pathconf->fattr);
7c513058 5238 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 5239}
5240
5241static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
5242 struct nfs_pathconf *pathconf)
5243{
0688e64b
TM		 5244 struct nfs4_exception exception = {
5245 .interruptible = true,
5246 };
1da177e4
LT		 5247 int err;
5248
5249 do {
5250 err = nfs4_handle_exception(server,
5251 _nfs4_proc_pathconf(server, fhandle, pathconf),
5252 &exception);
5253 } while (exception.retry);
5254 return err;
5255}
5256
5521abfd 5257int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 5258 const struct nfs_open_context *ctx,
5259 const struct nfs_lock_context *l_ctx,
5260 fmode_t fmode)
5261{
17393475 5262 return nfs4_select_rw_stateid(ctx->state, fmode, l_ctx, stateid, NULL);
9b206149
TM		 5263}
5264EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
5265
5521abfd
TM		 5266static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
5267 const struct nfs_open_context *ctx,
5268 const struct nfs_lock_context *l_ctx,
5269 fmode_t fmode)
5270{
d49dd117 5271 nfs4_stateid _current_stateid;
5521abfd 5272
e1253be0 5273 /* If the current stateid represents a lost lock, then exit */
d49dd117 5274 if (nfs4_set_rw_stateid(&_current_stateid, ctx, l_ctx, fmode) == -EIO)
e1253be0 5275 return true;
d49dd117 5276 return nfs4_stateid_match(stateid, &_current_stateid);
5521abfd
TM		 5277}
5278
5279static bool nfs4_error_stateid_expired(int err)
5280{
5281 switch (err) {
5282 case -NFS4ERR_DELEG_REVOKED:
5283 case -NFS4ERR_ADMIN_REVOKED:
5284 case -NFS4ERR_BAD_STATEID:
5285 case -NFS4ERR_STALE_STATEID:
5286 case -NFS4ERR_OLD_STATEID:
5287 case -NFS4ERR_OPENMODE:
5288 case -NFS4ERR_EXPIRED:
5289 return true;
5290 }
5291 return false;
5292}
5293
d45f60c6 5294static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
1da177e4 5295{
d45f60c6 5296 struct nfs_server *server = NFS_SERVER(hdr->inode);
1da177e4 5297
d45f60c6 5298 trace_nfs4_read(hdr, task->tk_status);
9c27869d
TM		 5299 if (task->tk_status < 0) {
5300 struct nfs4_exception exception = {
5301 .inode = hdr->inode,
5302 .state = hdr->args.context->state,
5303 .stateid = &hdr->args.stateid,
5304 };
5305 task->tk_status = nfs4_async_handle_exception(task,
5306 server, task->tk_status, &exception);
5307 if (exception.retry) {
5308 rpc_restart_call_prepare(task);
5309 return -EAGAIN;
5310 }
1da177e4 5311 }
8850df99 5312
1da177e4 5313 if (task->tk_status > 0)
d45f60c6 5314 renew_lease(server, hdr->timestamp);
ec06c096 5315 return 0;
1da177e4
LT		 5316}
5317
5521abfd 5318static bool nfs4_read_stateid_changed(struct rpc_task *task,
3c6b899c 5319 struct nfs_pgio_args *args)
5521abfd
TM		 5320{
5321
5322 if (!nfs4_error_stateid_expired(task->tk_status) ||
5323 nfs4_stateid_is_current(&args->stateid,
5324 args->context,
5325 args->lock_context,
5326 FMODE_READ))
5327 return false;
5328 rpc_restart_call_prepare(task);
5329 return true;
5330}
5331
c5675526
AS		 5332static bool nfs4_read_plus_not_supported(struct rpc_task *task,
5333 struct nfs_pgio_header *hdr)
cbdabc7f 5334{
c5675526
AS		 5335 struct nfs_server *server = NFS_SERVER(hdr->inode);
5336 struct rpc_message *msg = &task->tk_msg;
cbdabc7f 5337
c5675526
AS		 5338 if (msg->rpc_proc == &nfs4_procedures[NFSPROC4_CLNT_READ_PLUS] &&
5339 server->caps & NFS_CAP_READ_PLUS && task->tk_status == -ENOTSUPP) {
5340 server->caps &= ~NFS_CAP_READ_PLUS;
5341 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
5342 rpc_restart_call_prepare(task);
5343 return true;
5344 }
5345 return false;
5346}
5347
5348static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
5349{
cbdabc7f
AA		 5350 dprintk("--> %s\n", __func__);
5351
d45f60c6 5352 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
cbdabc7f 5353 return -EAGAIN;
d45f60c6 5354 if (nfs4_read_stateid_changed(task, &hdr->args))
5521abfd 5355 return -EAGAIN;
c5675526
AS		 5356 if (nfs4_read_plus_not_supported(task, hdr))
5357 return -EAGAIN;
bfc505de
TM		 5358 if (task->tk_status > 0)
5359 nfs_invalidate_atime(hdr->inode);
d45f60c6
WAA		 5360 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
5361 nfs4_read_done_cb(task, hdr);
cbdabc7f
AA		 5362}
5363
21e31401 5364#if defined CONFIG_NFS_V4_2 && defined CONFIG_NFS_V4_2_READ_PLUS
5c3485bb
TM		 5365static void nfs42_read_plus_support(struct nfs_pgio_header *hdr,
5366 struct rpc_message *msg)
c5675526 5367{
5c3485bb
TM		 5368 /* Note: We don't use READ_PLUS with pNFS yet */
5369 if (nfs_server_capable(hdr->inode, NFS_CAP_READ_PLUS) && !hdr->ds_clp)
c5675526 5370 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ_PLUS];
c5675526
AS		 5371}
5372#else
5c3485bb
TM		 5373static void nfs42_read_plus_support(struct nfs_pgio_header *hdr,
5374 struct rpc_message *msg)
c5675526 5375{
c5675526
AS		 5376}
5377#endif /* CONFIG_NFS_V4_2 */
5378
d45f60c6
WAA		 5379static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
5380 struct rpc_message *msg)
1da177e4 5381{
d45f60c6 5382 hdr->timestamp = jiffies;
ca857cc1
TM		 5383 if (!hdr->pgio_done_cb)
5384 hdr->pgio_done_cb = nfs4_read_done_cb;
5c3485bb
TM		 5385 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
5386 nfs42_read_plus_support(hdr, msg);
fba83f34 5387 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0, 0);
1da177e4
LT		 5388}
5389
d45f60c6
WAA		 5390static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
5391 struct nfs_pgio_header *hdr)
ea7c3303 5392{
42e1cca7 5393 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode)->nfs_client,
d45f60c6
WAA		 5394 &hdr->args.seq_args,
5395 &hdr->res.seq_res,
9b206149 5396 task))
ef1820f9 5397 return 0;
d45f60c6
WAA		 5398 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
5399 hdr->args.lock_context,
fbe77c30 5400 hdr->rw_mode) == -EIO)
ef1820f9 5401 return -EIO;
d45f60c6 5402 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
ef1820f9
N		 5403 return -EIO;
5404 return 0;
1da177e4
LT		 5405}
5406
d45f60c6
WAA		 5407static int nfs4_write_done_cb(struct rpc_task *task,
5408 struct nfs_pgio_header *hdr)
1da177e4 5409{
d45f60c6 5410 struct inode *inode = hdr->inode;
8478eaa1 5411
d45f60c6 5412 trace_nfs4_write(hdr, task->tk_status);
9c27869d
TM		 5413 if (task->tk_status < 0) {
5414 struct nfs4_exception exception = {
5415 .inode = hdr->inode,
5416 .state = hdr->args.context->state,
5417 .stateid = &hdr->args.stateid,
5418 };
5419 task->tk_status = nfs4_async_handle_exception(task,
5420 NFS_SERVER(inode), task->tk_status,
5421 &exception);
5422 if (exception.retry) {
5423 rpc_restart_call_prepare(task);
5424 return -EAGAIN;
5425 }
1da177e4 5426 }
4f9838c7 5427 if (task->tk_status >= 0) {
d45f60c6 5428 renew_lease(NFS_SERVER(inode), hdr->timestamp);
a08a8cd3 5429 nfs_writeback_update_inode(hdr);
4f9838c7 5430 }
788e7a89 5431 return 0;
1da177e4
LT		 5432}
5433
5521abfd 5434static bool nfs4_write_stateid_changed(struct rpc_task *task,
3c6b899c 5435 struct nfs_pgio_args *args)
5521abfd
TM		 5436{
5437
5438 if (!nfs4_error_stateid_expired(task->tk_status) ||
5439 nfs4_stateid_is_current(&args->stateid,
5440 args->context,
5441 args->lock_context,
5442 FMODE_WRITE))
5443 return false;
5444 rpc_restart_call_prepare(task);
5445 return true;
5446}
5447
d45f60c6 5448static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
b029bc9b 5449{
d45f60c6 5450 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
b029bc9b 5451 return -EAGAIN;
d45f60c6 5452 if (nfs4_write_stateid_changed(task, &hdr->args))
5521abfd 5453 return -EAGAIN;
d45f60c6
WAA		 5454 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
5455 nfs4_write_done_cb(task, hdr);
b029bc9b
FI		 5456}
5457
5a37f851 5458static
d45f60c6 5459bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
a69aef14 5460{
5a37f851 5461 /* Don't request attributes for pNFS or O_DIRECT writes */
d45f60c6 5462 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
5a37f851
TM		 5463 return false;
5464 /* Otherwise, request attributes if and only if we don't hold
5465 * a delegation
5466 */
011e2a7f 5467 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 5468}
a69aef14 5469
332d1a03
TM		 5470static void nfs4_bitmask_set(__u32 bitmask[NFS4_BITMASK_SZ], const __u32 *src,
5471 struct inode *inode, struct nfs_server *server,
5472 struct nfs4_label *label)
76bd5c01 5473{
76bd5c01 5474 unsigned long cache_validity = READ_ONCE(NFS_I(inode)->cache_validity);
332d1a03 5475 unsigned int i;
76bd5c01 5476
332d1a03 5477 memcpy(bitmask, src, sizeof(*bitmask) * NFS4_BITMASK_SZ);
76bd5c01 5478
13c0b082 5479 if (cache_validity & NFS_INO_INVALID_CHANGE)
332d1a03 5480 bitmask[0] |= FATTR4_WORD0_CHANGE;
76bd5c01
OK		 5481 if (cache_validity & NFS_INO_INVALID_ATIME)
5482 bitmask[1] |= FATTR4_WORD1_TIME_ACCESS;
720869eb
TM		 5483 if (cache_validity & NFS_INO_INVALID_MODE)
5484 bitmask[1] |= FATTR4_WORD1_MODE;
45901a23 5485 if (cache_validity & NFS_INO_INVALID_OTHER)
720869eb 5486 bitmask[1] |= FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP;
fabf2b34
TM		 5487 if (cache_validity & NFS_INO_INVALID_NLINK)
5488 bitmask[1] |= FATTR4_WORD1_NUMLINKS;
45901a23 5489 if (label && label->len && cache_validity & NFS_INO_INVALID_LABEL)
76bd5c01 5490 bitmask[2] |= FATTR4_WORD2_SECURITY_LABEL;
45901a23
TM		 5491 if (cache_validity & NFS_INO_INVALID_CTIME)
5492 bitmask[1] |= FATTR4_WORD1_TIME_METADATA;
76bd5c01
OK		 5493 if (cache_validity & NFS_INO_INVALID_MTIME)
5494 bitmask[1] |= FATTR4_WORD1_TIME_MODIFY;
76bd5c01
OK		 5495 if (cache_validity & NFS_INO_INVALID_BLOCKS)
5496 bitmask[1] |= FATTR4_WORD1_SPACE_USED;
332d1a03 5497
cc7f2dae 5498 if (cache_validity & NFS_INO_INVALID_SIZE)
332d1a03
TM		 5499 bitmask[0] |= FATTR4_WORD0_SIZE;
5500
5501 for (i = 0; i < NFS4_BITMASK_SZ; i++)
5502 bitmask[i] &= server->attr_bitmask[i];
76bd5c01
OK		 5503}
5504
d45f60c6 5505static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
fb91fb0e
AS		 5506 struct rpc_message *msg,
5507 struct rpc_clnt **clnt)
1da177e4 5508{
d45f60c6 5509 struct nfs_server *server = NFS_SERVER(hdr->inode);
bdc7f021 5510
d45f60c6
WAA		 5511 if (!nfs4_write_need_cache_consistency_data(hdr)) {
5512 hdr->args.bitmask = NULL;
5513 hdr->res.fattr = NULL;
76bd5c01 5514 } else {
332d1a03
TM		 5515 nfs4_bitmask_set(hdr->args.bitmask_store,
5516 server->cache_consistency_bitmask,
5517 hdr->inode, server, NULL);
5518 hdr->args.bitmask = hdr->args.bitmask_store;
76bd5c01 5519 }
5a37f851 5520
d45f60c6
WAA		 5521 if (!hdr->pgio_done_cb)
5522 hdr->pgio_done_cb = nfs4_write_done_cb;
5523 hdr->res.server = server;
5524 hdr->timestamp = jiffies;
1da177e4 5525
bdc7f021 5526 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
cd1b659d 5527 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0, 0);
fb91fb0e 5528 nfs4_state_protect_write(server->nfs_client, clnt, msg, hdr);
1da177e4
LT		 5529}
5530
0b7c0153 5531static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 5532{
42e1cca7 5533 nfs4_setup_sequence(NFS_SERVER(data->inode)->nfs_client,
d9afbd1b
TM		 5534 &data->args.seq_args,
5535 &data->res.seq_res,
5536 task);
1da177e4
LT		 5537}
5538
0b7c0153 5539static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 5540{
1da177e4 5541 struct inode *inode = data->inode;
14516c3a 5542
cc668ab3 5543 trace_nfs4_commit(data, task->tk_status);
8478eaa1
N		 5544 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
5545 NULL, NULL) == -EAGAIN) {
d00c5d43 5546 rpc_restart_call_prepare(task);
788e7a89 5547 return -EAGAIN;
1da177e4 5548 }
788e7a89 5549 return 0;
1da177e4
LT		 5550}
5551
0b7c0153 5552static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 5553{
5554 if (!nfs4_sequence_done(task, &data->res.seq_res))
5555 return -EAGAIN;
0b7c0153 5556 return data->commit_done_cb(task, data);
5f452431
FI		 5557}
5558
e9ae1ee2
AS		 5559static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg,
5560 struct rpc_clnt **clnt)
1da177e4 5561{
788e7a89 5562 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 5563
0b7c0153
FI		 5564 if (data->commit_done_cb == NULL)
5565 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 5566 data->res.server = server;
bdc7f021 5567 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
fba83f34 5568 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 0);
e9ae1ee2 5569 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_COMMIT, clnt, msg);
1da177e4
LT		 5570}
5571
6b8d84e2
OK		 5572static int _nfs4_proc_commit(struct file *dst, struct nfs_commitargs *args,
5573 struct nfs_commitres *res)
5574{
5575 struct inode *dst_inode = file_inode(dst);
5576 struct nfs_server *server = NFS_SERVER(dst_inode);
5577 struct rpc_message msg = {
5578 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT],
5579 .rpc_argp = args,
5580 .rpc_resp = res,
5581 };
5582
5583 args->fh = NFS_FH(dst_inode);
5584 return nfs4_call_sync(server->client, server, &msg,
5585 &args->seq_args, &res->seq_res, 1);
5586}
5587
5588int nfs4_proc_commit(struct file *dst, __u64 offset, __u32 count, struct nfs_commitres *res)
5589{
5590 struct nfs_commitargs args = {
5591 .offset = offset,
5592 .count = count,
5593 };
5594 struct nfs_server *dst_server = NFS_SERVER(file_inode(dst));
5595 struct nfs4_exception exception = { };
5596 int status;
5597
5598 do {
5599 status = _nfs4_proc_commit(dst, &args, res);
5600 status = nfs4_handle_exception(dst_server, status, &exception);
5601 } while (exception.retry);
5602
5603 return status;
5604}
5605
9bc4e3ca
CL		 5606struct nfs4_renewdata {
5607 struct nfs_client *client;
5608 unsigned long timestamp;
5609};
5610
1da177e4
LT		 5611/*
5612 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
5613 * standalone procedure for queueing an asynchronous RENEW.
5614 */
9bc4e3ca 5615static void nfs4_renew_release(void *calldata)
dc96aef9 5616{
9bc4e3ca
CL		 5617 struct nfs4_renewdata *data = calldata;
5618 struct nfs_client *clp = data->client;
dc96aef9 5619
212bf41d 5620 if (refcount_read(&clp->cl_count) > 1)
0851de06
AB		 5621 nfs4_schedule_state_renewal(clp);
5622 nfs_put_client(clp);
9bc4e3ca 5623 kfree(data);
dc96aef9
AB		 5624}
5625
9bc4e3ca 5626static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 5627{
9bc4e3ca
CL		 5628 struct nfs4_renewdata *data = calldata;
5629 struct nfs_client *clp = data->client;
5630 unsigned long timestamp = data->timestamp;
1da177e4 5631
c6d01c6f 5632 trace_nfs4_renew_async(clp, task->tk_status);
f8aba1e8
CL		 5633 switch (task->tk_status) {
5634 case 0:
5635 break;
5636 case -NFS4ERR_LEASE_MOVED:
5637 nfs4_schedule_lease_moved_recovery(clp);
5638 break;
5639 default:
95baa25c 5640 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 5641 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
5642 return;
5643 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 5644 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 5645 return;
5646 }
5647 nfs4_schedule_path_down_recovery(clp);
1da177e4 5648 }
452e9352 5649 do_renew_lease(clp, timestamp);
1da177e4
LT		 5650}
5651
963d8fe5
TM		 5652static const struct rpc_call_ops nfs4_renew_ops = {
5653 .rpc_call_done = nfs4_renew_done,
dc96aef9 5654 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 5655};
5656
a52458b4 5657static int nfs4_proc_async_renew(struct nfs_client *clp, const struct cred *cred, unsigned renew_flags)
1da177e4
LT		 5658{
5659 struct rpc_message msg = {
5660 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
5661 .rpc_argp = clp,
b4454fe1 5662 .rpc_cred = cred,
1da177e4 5663 };
9bc4e3ca 5664 struct nfs4_renewdata *data;
1da177e4 5665
2f60ea6b
TM		 5666 if (renew_flags == 0)
5667 return 0;
212bf41d 5668 if (!refcount_inc_not_zero(&clp->cl_count))
0851de06 5669 return -EIO;
b569ad34 5670 data = kmalloc(sizeof(*data), GFP_NOFS);
5c737cb2
DW		 5671 if (data == NULL) {
5672 nfs_put_client(clp);
9bc4e3ca 5673 return -ENOMEM;
5c737cb2 5674 }
9bc4e3ca
CL		 5675 data->client = clp;
5676 data->timestamp = jiffies;
bc7a05ca 5677 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 5678 &nfs4_renew_ops, data);
1da177e4
LT		 5679}
5680
a52458b4 5681static int nfs4_proc_renew(struct nfs_client *clp, const struct cred *cred)
1da177e4
LT		 5682{
5683 struct rpc_message msg = {
5684 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
5685 .rpc_argp = clp,
b4454fe1 5686 .rpc_cred = cred,
1da177e4
LT		 5687 };
5688 unsigned long now = jiffies;
5689 int status;
5690
bc7a05ca 5691 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 5692 if (status < 0)
5693 return status;
452e9352 5694 do_renew_lease(clp, now);
1da177e4
LT		 5695 return 0;
5696}
5697
aa1870af
BF		 5698static inline int nfs4_server_supports_acls(struct nfs_server *server)
5699{
7dd7d959 5700 return server->caps & NFS_CAP_ACLS;
aa1870af
BF		 5701}
5702
21f498c2
TM		 5703/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
5704 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 5705 * the stack.
5706 */
21f498c2 5707#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 5708
ccde1e9c 5709int nfs4_buf_to_pages_noslab(const void *buf, size_t buflen,
8fbcf237 5710 struct page **pages)
e9e3d724
NH		 5711{
5712 struct page *newpage, **spages;
5713 int rc = 0;
5714 size_t len;
5715 spages = pages;
5716
5717 do {
21f498c2 5718 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 5719 newpage = alloc_page(GFP_KERNEL);
5720
5721 if (newpage == NULL)
5722 goto unwind;
5723 memcpy(page_address(newpage), buf, len);
d9b67e1e
AS		 5724 buf += len;
5725 buflen -= len;
e9e3d724
NH		 5726 *pages++ = newpage;
5727 rc++;
5728 } while (buflen != 0);
5729
5730 return rc;
5731
5732unwind:
5733 for(; rc > 0; rc--)
5734 __free_page(spages[rc-1]);
5735 return -ENOMEM;
5736}
5737
e50a1c2e
BF		 5738struct nfs4_cached_acl {
5739 int cached;
5740 size_t len;
5601cda8 5741 char data[];
e50a1c2e
BF		 5742};
5743
5744static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
5745{
5746 struct nfs_inode *nfsi = NFS_I(inode);
5747
5748 spin_lock(&inode->i_lock);
5749 kfree(nfsi->nfs4_acl);
5750 nfsi->nfs4_acl = acl;
5751 spin_unlock(&inode->i_lock);
5752}
5753
5754static void nfs4_zap_acl_attr(struct inode *inode)
5755{
5756 nfs4_set_cached_acl(inode, NULL);
5757}
5758
5759static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
5760{
5761 struct nfs_inode *nfsi = NFS_I(inode);
5762 struct nfs4_cached_acl *acl;
5763 int ret = -ENOENT;
5764
5765 spin_lock(&inode->i_lock);
5766 acl = nfsi->nfs4_acl;
5767 if (acl == NULL)
5768 goto out;
5769 if (buf == NULL) /* user is just asking for length */
5770 goto out_len;
5771 if (acl->cached == 0)
5772 goto out;
5773 ret = -ERANGE; /* see getxattr(2) man page */
5774 if (acl->len > buflen)
5775 goto out;
5776 memcpy(buf, acl->data, acl->len);
5777out_len:
5778 ret = acl->len;
5779out:
5780 spin_unlock(&inode->i_lock);
5781 return ret;
5782}
5783
5794d21e 5784static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 5785{
5786 struct nfs4_cached_acl *acl;
b291f1b1 5787 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 5788
1f1ea6c2 5789 if (buflen <= PAGE_SIZE) {
b291f1b1 5790 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 5791 if (acl == NULL)
5792 goto out;
5793 acl->cached = 1;
5794d21e 5794 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 5795 } else {
5796 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
5797 if (acl == NULL)
5798 goto out;
5799 acl->cached = 0;
5800 }
5801 acl->len = acl_len;
5802out:
5803 nfs4_set_cached_acl(inode, acl);
5804}
5805
bf118a34
AA		 5806/*
5807 * The getxattr API returns the required buffer length when called with a
5808 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
5809 * the required buf. On a NULL buf, we send a page of data to the server
5810 * guessing that the ACL request can be serviced by a page. If so, we cache
5811 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
5812 * the cache. If not so, we throw away the page, and cache the required
5813 * length. The next getxattr call will then produce another round trip to
5814 * the server, this time with the input buf of the required size.
5815 */
16b4289c 5816static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 5817{
62a1573f 5818 struct page **pages;
aa1870af
BF		 5819 struct nfs_getaclargs args = {
5820 .fh = NFS_FH(inode),
aa1870af
BF		 5821 .acl_len = buflen,
5822 };
663c79b3
BH		 5823 struct nfs_getaclres res = {
5824 .acl_len = buflen,
5825 };
aa1870af
BF		 5826 struct rpc_message msg = {
5827 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
5828 .rpc_argp = &args,
663c79b3 5829 .rpc_resp = &res,
aa1870af 5830 };
62a1573f 5831 unsigned int npages;
21f498c2 5832 int ret = -ENOMEM, i;
62a1573f
OK		 5833 struct nfs_server *server = NFS_SERVER(inode);
5834
5835 if (buflen == 0)
5836 buflen = server->rsize;
5837
5838 npages = DIV_ROUND_UP(buflen, PAGE_SIZE) + 1;
5839 pages = kmalloc_array(npages, sizeof(struct page *), GFP_NOFS);
5840 if (!pages)
5841 return -ENOMEM;
aa1870af 5842
62a1573f 5843 args.acl_pages = pages;
5a006899 5844
bf118a34
AA		 5845 for (i = 0; i < npages; i++) {
5846 pages[i] = alloc_page(GFP_KERNEL);
5847 if (!pages[i])
5848 goto out_free;
e50a1c2e 5849 }
5a006899
SP		 5850
5851 /* for decoding across pages */
5852 res.acl_scratch = alloc_page(GFP_KERNEL);
5853 if (!res.acl_scratch)
5854 goto out_free;
5855
bf118a34 5856 args.acl_len = npages * PAGE_SIZE;
5a006899 5857
de040bec 5858 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 5859 __func__, buf, buflen, npages, args.acl_len);
5860 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
5861 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 5862 if (ret)
5863 goto out_free;
bf118a34 5864
1f1ea6c2
TM		 5865 /* Handle the case where the passed-in buffer is too short */
5866 if (res.acl_flags & NFS4_ACL_TRUNC) {
5867 /* Did the user only issue a request for the acl length? */
5868 if (buf == NULL)
5869 goto out_ok;
e50a1c2e 5870 ret = -ERANGE;
1f1ea6c2 5871 goto out_free;
e50a1c2e 5872 }
1f1ea6c2 5873 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 5874 if (buf) {
5875 if (res.acl_len > buflen) {
5876 ret = -ERANGE;
5877 goto out_free;
5878 }
1f1ea6c2 5879 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 5880 }
1f1ea6c2
TM		 5881out_ok:
5882 ret = res.acl_len;
e50a1c2e 5883out_free:
bf118a34
AA		 5884 for (i = 0; i < npages; i++)
5885 if (pages[i])
5886 __free_page(pages[i]);
331818f1
TM		 5887 if (res.acl_scratch)
5888 __free_page(res.acl_scratch);
62a1573f 5889 kfree(pages);
aa1870af
BF		 5890 return ret;
5891}
5892
16b4289c
TM		 5893static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
5894{
0688e64b
TM		 5895 struct nfs4_exception exception = {
5896 .interruptible = true,
5897 };
16b4289c
TM		 5898 ssize_t ret;
5899 do {
5900 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
c1578b76 5901 trace_nfs4_get_acl(inode, ret);
16b4289c
TM		 5902 if (ret >= 0)
5903 break;
5904 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
5905 } while (exception.retry);
5906 return ret;
5907}
5908
e50a1c2e
BF		 5909static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
5910{
5911 struct nfs_server *server = NFS_SERVER(inode);
5912 int ret;
5913
5914 if (!nfs4_server_supports_acls(server))
5915 return -EOPNOTSUPP;
1f3208b2 5916 ret = nfs_revalidate_inode(inode, NFS_INO_INVALID_CHANGE);
e50a1c2e
BF		 5917 if (ret < 0)
5918 return ret;
08a22b39
AK		 5919 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
5920 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 5921 ret = nfs4_read_cached_acl(inode, buf, buflen);
5922 if (ret != -ENOENT)
bf118a34
AA		 5923 /* -ENOENT is returned if there is no ACL or if there is an ACL
5924 * but no cached acl data, just the acl length */
e50a1c2e
BF		 5925 return ret;
5926 return nfs4_get_acl_uncached(inode, buf, buflen);
5927}
5928
16b4289c 5929static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 5930{
5931 struct nfs_server *server = NFS_SERVER(inode);
5932 struct page *pages[NFS4ACL_MAXPAGES];
5933 struct nfs_setaclargs arg = {
5934 .fh = NFS_FH(inode),
5935 .acl_pages = pages,
5936 .acl_len = buflen,
5937 };
73c403a9 5938 struct nfs_setaclres res;
4b580ee3
BF		 5939 struct rpc_message msg = {
5940 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
5941 .rpc_argp = &arg,
73c403a9 5942 .rpc_resp = &res,
4b580ee3 5943 };
21f498c2 5944 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 5945 int ret, i;
4b580ee3 5946
4f8be1f5
BF		 5947 /* You can't remove system.nfs4_acl: */
5948 if (buflen == 0)
5949 return -EINVAL;
4b580ee3
BF		 5950 if (!nfs4_server_supports_acls(server))
5951 return -EOPNOTSUPP;
21f498c2
TM		 5952 if (npages > ARRAY_SIZE(pages))
5953 return -ERANGE;
ccde1e9c 5954 i = nfs4_buf_to_pages_noslab(buf, buflen, arg.acl_pages);
e9e3d724
NH		 5955 if (i < 0)
5956 return i;
c01d3645 5957 nfs4_inode_make_writeable(inode);
7c513058 5958 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 5959
5960 /*
5961 * Free each page after tx, so the only ref left is
5962 * held by the network stack
5963 */
5964 for (; i > 0; i--)
5965 put_page(pages[i-1]);
5966
08a22b39
AK		 5967 /*
5968 * Acl update can result in inode attribute update.
5969 * so mark the attribute cache invalid.
5970 */
5971 spin_lock(&inode->i_lock);
b6f80a2e
TM		 5972 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE |
5973 NFS_INO_INVALID_CTIME |
5974 NFS_INO_REVAL_FORCED);
08a22b39 5975 spin_unlock(&inode->i_lock);
f41f7418
TM		 5976 nfs_access_zap_cache(inode);
5977 nfs_zap_acl_cache(inode);
4b580ee3
BF		 5978 return ret;
5979}
5980
16b4289c
TM		 5981static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
5982{
5983 struct nfs4_exception exception = { };
5984 int err;
5985 do {
c1578b76
TM		 5986 err = __nfs4_proc_set_acl(inode, buf, buflen);
5987 trace_nfs4_set_acl(inode, err);
f8849e20
DN		 5988 if (err == -NFS4ERR_BADOWNER || err == -NFS4ERR_BADNAME) {
5989 /*
5990 * no need to retry since the kernel
5991 * isn't involved in encoding the ACEs.
5992 */
5993 err = -EINVAL;
5994 break;
5995 }
c1578b76 5996 err = nfs4_handle_exception(NFS_SERVER(inode), err,
16b4289c
TM		 5997 &exception);
5998 } while (exception.retry);
5999 return err;
6000}
6001
aa9c2669
DQ		 6002#ifdef CONFIG_NFS_V4_SECURITY_LABEL
6003static int _nfs4_get_security_label(struct inode *inode, void *buf,
6004 size_t buflen)
6005{
6006 struct nfs_server *server = NFS_SERVER(inode);
6007 struct nfs_fattr fattr;
6008 struct nfs4_label label = {0, 0, buflen, buf};
6009
6010 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
fcb63a9b 6011 struct nfs4_getattr_arg arg = {
aa9c2669
DQ		 6012 .fh = NFS_FH(inode),
6013 .bitmask = bitmask,
6014 };
6015 struct nfs4_getattr_res res = {
6016 .fattr = &fattr,
6017 .label = &label,
6018 .server = server,
6019 };
6020 struct rpc_message msg = {
6021 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
fcb63a9b 6022 .rpc_argp = &arg,
aa9c2669
DQ		 6023 .rpc_resp = &res,
6024 };
6025 int ret;
6026
6027 nfs_fattr_init(&fattr);
6028
fcb63a9b 6029 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
aa9c2669
DQ		 6030 if (ret)
6031 return ret;
6032 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
6033 return -ENOENT;
53cb2454 6034 return label.len;
aa9c2669
DQ		 6035}
6036
6037static int nfs4_get_security_label(struct inode *inode, void *buf,
6038 size_t buflen)
6039{
0688e64b
TM		 6040 struct nfs4_exception exception = {
6041 .interruptible = true,
6042 };
aa9c2669
DQ		 6043 int err;
6044
6045 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
6046 return -EOPNOTSUPP;
6047
6048 do {
c1578b76
TM		 6049 err = _nfs4_get_security_label(inode, buf, buflen);
6050 trace_nfs4_get_security_label(inode, err);
6051 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 6052 &exception);
6053 } while (exception.retry);
6054 return err;
6055}
6056
6057static int _nfs4_do_set_security_label(struct inode *inode,
6058 struct nfs4_label *ilabel,
6059 struct nfs_fattr *fattr,
6060 struct nfs4_label *olabel)
6061{
6062
6063 struct iattr sattr = {0};
6064 struct nfs_server *server = NFS_SERVER(inode);
6065 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
12207f69 6066 struct nfs_setattrargs arg = {
d9b67e1e
AS		 6067 .fh = NFS_FH(inode),
6068 .iap = &sattr,
aa9c2669
DQ		 6069 .server = server,
6070 .bitmask = bitmask,
6071 .label = ilabel,
6072 };
6073 struct nfs_setattrres res = {
6074 .fattr = fattr,
6075 .label = olabel,
6076 .server = server,
6077 };
6078 struct rpc_message msg = {
d9b67e1e
AS		 6079 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
6080 .rpc_argp = &arg,
6081 .rpc_resp = &res,
aa9c2669
DQ		 6082 };
6083 int status;
6084
12207f69 6085 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
aa9c2669 6086
12207f69 6087 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
aa9c2669
DQ		 6088 if (status)
6089 dprintk("%s failed: %d\n", __func__, status);
6090
6091 return status;
6092}
6093
6094static int nfs4_do_set_security_label(struct inode *inode,
6095 struct nfs4_label *ilabel,
6096 struct nfs_fattr *fattr,
6097 struct nfs4_label *olabel)
6098{
6099 struct nfs4_exception exception = { };
6100 int err;
6101
6102 do {
c1578b76
TM		 6103 err = _nfs4_do_set_security_label(inode, ilabel,
6104 fattr, olabel);
6105 trace_nfs4_set_security_label(inode, err);
6106 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 6107 &exception);
6108 } while (exception.retry);
6109 return err;
6110}
6111
6112static int
59301226 6113nfs4_set_security_label(struct inode *inode, const void *buf, size_t buflen)
aa9c2669
DQ		 6114{
6115 struct nfs4_label ilabel, *olabel = NULL;
6116 struct nfs_fattr fattr;
aa9c2669
DQ		 6117 int status;
6118
6119 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
6120 return -EOPNOTSUPP;
6121
6122 nfs_fattr_init(&fattr);
6123
6124 ilabel.pi = 0;
6125 ilabel.lfs = 0;
6126 ilabel.label = (char *)buf;
6127 ilabel.len = buflen;
6128
aa9c2669
DQ		 6129 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
6130 if (IS_ERR(olabel)) {
6131 status = -PTR_ERR(olabel);
6132 goto out;
6133 }
6134
6135 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
6136 if (status == 0)
6137 nfs_setsecurity(inode, &fattr, olabel);
6138
6139 nfs4_label_free(olabel);
6140out:
aa9c2669
DQ		 6141 return status;
6142}
6143#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
6144
6145
f092075d
CL		 6146static void nfs4_init_boot_verifier(const struct nfs_client *clp,
6147 nfs4_verifier *bootverf)
cd93710e
CL		 6148{
6149 __be32 verf[2];
6150
2c820d9a
CL		 6151 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
6152 /* An impossible timestamp guarantees this value
6153 * will never match a generated boot time. */
2f86e091
DD		 6154 verf[0] = cpu_to_be32(U32_MAX);
6155 verf[1] = cpu_to_be32(U32_MAX);
2c820d9a 6156 } else {
f092075d 6157 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
2f86e091
DD		 6158 u64 ns = ktime_to_ns(nn->boot_time);
6159
6160 verf[0] = cpu_to_be32(ns >> 32);
6161 verf[1] = cpu_to_be32(ns);
2c820d9a 6162 }
cd93710e
CL		 6163 memcpy(bootverf->data, verf, sizeof(bootverf->data));
6164}
6165
1aee5513 6166static size_t
39d43d16 6167nfs4_get_uniquifier(struct nfs_client *clp, char *buf, size_t buflen)
1aee5513 6168{
39d43d16
TM		 6169 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
6170 struct nfs_netns_client *nn_clp = nn->nfs_client;
6171 const char *id;
6172
1aee5513
TM		 6173 buf[0] = '\0';
6174
39d43d16
TM		 6175 if (nn_clp) {
6176 rcu_read_lock();
6177 id = rcu_dereference(nn_clp->identifier);
6178 if (id)
6179 strscpy(buf, id, buflen);
6180 rcu_read_unlock();
6181 }
6182
6183 if (nfs4_client_id_uniquifier[0] != '\0' && buf[0] == '\0')
1aee5513
TM		 6184 strscpy(buf, nfs4_client_id_uniquifier, buflen);
6185
6186 return strlen(buf);
6187}
6188
a3192688
JL		 6189static int
6190nfs4_init_nonuniform_client_string(struct nfs_client *clp)
e984a55a 6191{
1aee5513
TM		 6192 char buf[NFS4_CLIENT_ID_UNIQ_LEN];
6193 size_t buflen;
a3192688
JL		 6194 size_t len;
6195 char *str;
e984a55a 6196
ceb3a16c 6197 if (clp->cl_owner_id != NULL)
a3192688 6198 return 0;
4a3e5779 6199
a3192688 6200 rcu_read_lock();
848a4eb2
CL		 6201 len = 14 +
6202 strlen(clp->cl_rpcclient->cl_nodename) +
6203 1 +
a3192688 6204 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) +
a3192688
JL		 6205 1;
6206 rcu_read_unlock();
1aee5513 6207
39d43d16 6208 buflen = nfs4_get_uniquifier(clp, buf, sizeof(buf));
1aee5513
TM		 6209 if (buflen)
6210 len += buflen + 1;
6211
a3192688
JL		 6212 if (len > NFS4_OPAQUE_LIMIT + 1)
6213 return -EINVAL;
6214
6215 /*
6216 * Since this string is allocated at mount time, and held until the
6217 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
6218 * about a memory-reclaim deadlock.
6219 */
6220 str = kmalloc(len, GFP_KERNEL);
6221 if (!str)
6222 return -ENOMEM;
ceb3a16c 6223
e984a55a 6224 rcu_read_lock();
1aee5513 6225 if (buflen)
025bb9f8 6226 scnprintf(str, len, "Linux NFSv4.0 %s/%s/%s",
1aee5513 6227 clp->cl_rpcclient->cl_nodename, buf,
848a4eb2 6228 rpc_peeraddr2str(clp->cl_rpcclient,
025bb9f8 6229 RPC_DISPLAY_ADDR));
848a4eb2 6230 else
025bb9f8 6231 scnprintf(str, len, "Linux NFSv4.0 %s/%s",
848a4eb2
CL		 6232 clp->cl_rpcclient->cl_nodename,
6233 rpc_peeraddr2str(clp->cl_rpcclient,
025bb9f8 6234 RPC_DISPLAY_ADDR));
e984a55a 6235 rcu_read_unlock();
a3192688 6236
a3192688
JL		 6237 clp->cl_owner_id = str;
6238 return 0;
e984a55a
CL		 6239}
6240
873e3851
JL		 6241static int
6242nfs4_init_uniform_client_string(struct nfs_client *clp)
e984a55a 6243{
1aee5513
TM		 6244 char buf[NFS4_CLIENT_ID_UNIQ_LEN];
6245 size_t buflen;
873e3851
JL		 6246 size_t len;
6247 char *str;
ceb3a16c
TM		 6248
6249 if (clp->cl_owner_id != NULL)
873e3851 6250 return 0;
6f2ea7f2 6251
873e3851
JL		 6252 len = 10 + 10 + 1 + 10 + 1 +
6253 strlen(clp->cl_rpcclient->cl_nodename) + 1;
6254
39d43d16 6255 buflen = nfs4_get_uniquifier(clp, buf, sizeof(buf));
1aee5513
TM		 6256 if (buflen)
6257 len += buflen + 1;
6258
873e3851
JL		 6259 if (len > NFS4_OPAQUE_LIMIT + 1)
6260 return -EINVAL;
6261
6262 /*
6263 * Since this string is allocated at mount time, and held until the
6264 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
6265 * about a memory-reclaim deadlock.
6266 */
6267 str = kmalloc(len, GFP_KERNEL);
6268 if (!str)
6269 return -ENOMEM;
6270
1aee5513
TM		 6271 if (buflen)
6272 scnprintf(str, len, "Linux NFSv%u.%u %s/%s",
6273 clp->rpc_ops->version, clp->cl_minorversion,
6274 buf, clp->cl_rpcclient->cl_nodename);
6275 else
6276 scnprintf(str, len, "Linux NFSv%u.%u %s",
6277 clp->rpc_ops->version, clp->cl_minorversion,
6278 clp->cl_rpcclient->cl_nodename);
873e3851
JL		 6279 clp->cl_owner_id = str;
6280 return 0;
e984a55a
CL		 6281}
6282
706cb8db
CL		 6283/*
6284 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
6285 * services. Advertise one based on the address family of the
6286 * clientaddr.
6287 */
6288static unsigned int
6289nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
6290{
6291 if (strchr(clp->cl_ipaddr, ':') != NULL)
6292 return scnprintf(buf, len, "tcp6");
6293 else
6294 return scnprintf(buf, len, "tcp");
6295}
6296
f11b2a1c
JL		 6297static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
6298{
6299 struct nfs4_setclientid *sc = calldata;
6300
6301 if (task->tk_status == 0)
6302 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
6303}
6304
6305static const struct rpc_call_ops nfs4_setclientid_ops = {
6306 .rpc_call_done = nfs4_setclientid_done,
6307};
6308
6bbb4ae8
CL		 6309/**
6310 * nfs4_proc_setclientid - Negotiate client ID
6311 * @clp: state data structure
6312 * @program: RPC program for NFSv4 callback service
6313 * @port: IP port number for NFS4 callback service
a52458b4 6314 * @cred: credential to use for this call
6bbb4ae8
CL		 6315 * @res: where to place the result
6316 *
6317 * Returns zero, a negative errno, or a negative NFS4ERR status code.
6318 */
bb8b27e5 6319int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
a52458b4 6320 unsigned short port, const struct cred *cred,
bb8b27e5 6321 struct nfs4_setclientid_res *res)
1da177e4
LT		 6322{
6323 nfs4_verifier sc_verifier;
6324 struct nfs4_setclientid setclientid = {
6325 .sc_verifier = &sc_verifier,
6326 .sc_prog = program,
3a6bb738 6327 .sc_clnt = clp,
1da177e4
LT		 6328 };
6329 struct rpc_message msg = {
6330 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
6331 .rpc_argp = &setclientid,
bb8b27e5 6332 .rpc_resp = res,
286d7d6a 6333 .rpc_cred = cred,
1da177e4 6334 };
f11b2a1c
JL		 6335 struct rpc_task_setup task_setup_data = {
6336 .rpc_client = clp->cl_rpcclient,
6337 .rpc_message = &msg,
6338 .callback_ops = &nfs4_setclientid_ops,
6339 .callback_data = &setclientid,
5a0c257f 6340 .flags = RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN,
f11b2a1c 6341 };
7dc2993a 6342 unsigned long now = jiffies;
6bbb4ae8 6343 int status;
1da177e4 6344
de734831 6345 /* nfs_client_id4 */
f092075d 6346 nfs4_init_boot_verifier(clp, &sc_verifier);
873e3851
JL		 6347
6348 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
6349 status = nfs4_init_uniform_client_string(clp);
6350 else
a3192688 6351 status = nfs4_init_nonuniform_client_string(clp);
873e3851
JL		 6352
6353 if (status)
6354 goto out;
3a6bb738 6355
de734831 6356 /* cb_client4 */
706cb8db
CL		 6357 setclientid.sc_netid_len =
6358 nfs4_init_callback_netid(clp,
6359 setclientid.sc_netid,
6360 sizeof(setclientid.sc_netid));
de734831 6361 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 6362 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 6363 clp->cl_ipaddr, port >> 8, port & 255);
6364
3a6bb738 6365 dprintk("NFS call setclientid auth=%s, '%s'\n",
6bbb4ae8 6366 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3a6bb738 6367 clp->cl_owner_id);
dae40965
AS		 6368
6369 status = nfs4_call_sync_custom(&task_setup_data);
f11b2a1c 6370 if (setclientid.sc_cred) {
1047ec86 6371 kfree(clp->cl_acceptor);
f11b2a1c
JL		 6372 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
6373 put_rpccred(setclientid.sc_cred);
6374 }
7dc2993a
RM		 6375
6376 if (status == 0)
6377 do_renew_lease(clp, now);
f11b2a1c 6378out:
c6d01c6f 6379 trace_nfs4_setclientid(clp, status);
6bbb4ae8
CL		 6380 dprintk("NFS reply setclientid: %d\n", status);
6381 return status;
1da177e4
LT		 6382}
6383
6bbb4ae8
CL		 6384/**
6385 * nfs4_proc_setclientid_confirm - Confirm client ID
6386 * @clp: state data structure
302fad7b 6387 * @arg: result of a previous SETCLIENTID
a52458b4 6388 * @cred: credential to use for this call
6bbb4ae8
CL		 6389 *
6390 * Returns zero, a negative errno, or a negative NFS4ERR status code.
6391 */
fd954ae1 6392int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5 6393 struct nfs4_setclientid_res *arg,
a52458b4 6394 const struct cred *cred)
1da177e4 6395{
1da177e4
LT		 6396 struct rpc_message msg = {
6397 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 6398 .rpc_argp = arg,
286d7d6a 6399 .rpc_cred = cred,
1da177e4 6400 };
1da177e4
LT		 6401 int status;
6402
6bbb4ae8
CL		 6403 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
6404 clp->cl_rpcclient->cl_auth->au_ops->au_name,
6405 clp->cl_clientid);
5a0c257f
N		 6406 status = rpc_call_sync(clp->cl_rpcclient, &msg,
6407 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN);
c6d01c6f 6408 trace_nfs4_setclientid_confirm(clp, status);
6bbb4ae8 6409 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 6410 return status;
6411}
6412
fe650407
TM		 6413struct nfs4_delegreturndata {
6414 struct nfs4_delegreturnargs args;
fa178f29 6415 struct nfs4_delegreturnres res;
fe650407
TM		 6416 struct nfs_fh fh;
6417 nfs4_stateid stateid;
26e976a8 6418 unsigned long timestamp;
586f1c39
TM		 6419 struct {
6420 struct nfs4_layoutreturn_args arg;
6421 struct nfs4_layoutreturn_res res;
4d796d75 6422 struct nfs4_xdr_opaque_data ld_private;
586f1c39
TM		 6423 u32 roc_barrier;
6424 bool roc;
6425 } lr;
fa178f29 6426 struct nfs_fattr fattr;
fe650407 6427 int rpc_status;
039b756a 6428 struct inode *inode;
fe650407
TM		 6429};
6430
fe650407
TM		 6431static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
6432{
6433 struct nfs4_delegreturndata *data = calldata;
e0dba012
TM		 6434 struct nfs4_exception exception = {
6435 .inode = data->inode,
6436 .stateid = &data->stateid,
dfe1fe75 6437 .task_is_privileged = data->args.seq_args.sa_privileged,
e0dba012 6438 };
938e1010 6439
14516c3a
TM		 6440 if (!nfs4_sequence_done(task, &data->res.seq_res))
6441 return;
938e1010 6442
ca8acf8d 6443 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
586f1c39
TM		 6444
6445 /* Handle Layoutreturn errors */
078000d0
TM		 6446 if (pnfs_roc_done(task, &data->args.lr_args, &data->res.lr_res,
6447 &data->res.lr_ret) == -EAGAIN)
287a9c55 6448 goto out_restart;
586f1c39 6449
79708861 6450 switch (task->tk_status) {
79708861 6451 case 0:
fa178f29 6452 renew_lease(data->res.server, data->timestamp);
23ea44c2 6453 break;
c97cf606
TM		 6454 case -NFS4ERR_ADMIN_REVOKED:
6455 case -NFS4ERR_DELEG_REVOKED:
26d36301
TM		 6456 case -NFS4ERR_EXPIRED:
6457 nfs4_free_revoked_stateid(data->res.server,
6458 data->args.stateid,
6459 task->tk_msg.rpc_cred);
df561f66 6460 fallthrough;
c97cf606 6461 case -NFS4ERR_BAD_STATEID:
c97cf606 6462 case -NFS4ERR_STALE_STATEID:
244fcd2f 6463 case -ETIMEDOUT:
c97cf606
TM		 6464 task->tk_status = 0;
6465 break;
12f275cd 6466 case -NFS4ERR_OLD_STATEID:
246afc0a
TM		 6467 if (!nfs4_refresh_delegation_stateid(&data->stateid, data->inode))
6468 nfs4_stateid_seqid_inc(&data->stateid);
70d136b2
TM		 6469 if (data->args.bitmask) {
6470 data->args.bitmask = NULL;
6471 data->res.fattr = NULL;
6472 }
246afc0a 6473 goto out_restart;
8ac2b422
TM		 6474 case -NFS4ERR_ACCESS:
6475 if (data->args.bitmask) {
6476 data->args.bitmask = NULL;
6477 data->res.fattr = NULL;
140087fd 6478 goto out_restart;
8ac2b422 6479 }
df561f66 6480 fallthrough;
79708861 6481 default:
e0dba012
TM		 6482 task->tk_status = nfs4_async_handle_exception(task,
6483 data->res.server, task->tk_status,
6484 &exception);
6485 if (exception.retry)
140087fd 6486 goto out_restart;
79708861 6487 }
d51f91d2 6488 nfs_delegation_mark_returned(data->inode, data->args.stateid);
79708861 6489 data->rpc_status = task->tk_status;
140087fd 6490 return;
140087fd
TM		 6491out_restart:
6492 task->tk_status = 0;
6493 rpc_restart_call_prepare(task);
fe650407
TM		 6494}
6495
6496static void nfs4_delegreturn_release(void *calldata)
6497{
039b756a 6498 struct nfs4_delegreturndata *data = calldata;
ea7c38fe 6499 struct inode *inode = data->inode;
039b756a 6500
078000d0
TM		 6501 if (data->lr.roc)
6502 pnfs_roc_release(&data->lr.arg, &data->lr.res,
6503 data->res.lr_ret);
ea7c38fe 6504 if (inode) {
0bc2c9b4 6505 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
ea7c38fe
TM		 6506 nfs_iput_and_deactive(inode);
6507 }
fe650407
TM		 6508 kfree(calldata);
6509}
6510
938e1010
AA		 6511static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
6512{
6513 struct nfs4_delegreturndata *d_data;
c8bf7073 6514 struct pnfs_layout_hdr *lo;
938e1010
AA		 6515
6516 d_data = (struct nfs4_delegreturndata *)data;
6517
5326de9e
TM		 6518 if (!d_data->lr.roc && nfs4_wait_on_layoutreturn(d_data->inode, task)) {
6519 nfs4_sequence_done(task, &d_data->res.seq_res);
500d701f 6520 return;
5326de9e 6521 }
500d701f 6522
c8bf7073
TM		 6523 lo = d_data->args.lr_args ? d_data->args.lr_args->layout : NULL;
6524 if (lo && !pnfs_layout_is_valid(lo)) {
6525 d_data->args.lr_args = NULL;
6526 d_data->res.lr_res = NULL;
6527 }
6528
42e1cca7 6529 nfs4_setup_sequence(d_data->res.server->nfs_client,
d9afbd1b
TM		 6530 &d_data->args.seq_args,
6531 &d_data->res.seq_res,
6532 task);
938e1010 6533}
938e1010 6534
c8d149f3 6535static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010 6536 .rpc_call_prepare = nfs4_delegreturn_prepare,
fe650407
TM		 6537 .rpc_call_done = nfs4_delegreturn_done,
6538 .rpc_release = nfs4_delegreturn_release,
6539};
6540
a52458b4 6541static int _nfs4_proc_delegreturn(struct inode *inode, const struct cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 6542{
6543 struct nfs4_delegreturndata *data;
fa178f29 6544 struct nfs_server *server = NFS_SERVER(inode);
fe650407 6545 struct rpc_task *task;
5138fde0
TM		 6546 struct rpc_message msg = {
6547 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
6548 .rpc_cred = cred,
6549 };
c970aa85
TM		 6550 struct rpc_task_setup task_setup_data = {
6551 .rpc_client = server->client,
5138fde0 6552 .rpc_message = &msg,
c970aa85 6553 .callback_ops = &nfs4_delegreturn_ops,
85e39fee 6554 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT | RPC_TASK_MOVEABLE,
c970aa85 6555 };
e6f81075 6556 int status = 0;
fe650407 6557
8535b2be 6558 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 6559 if (data == NULL)
6560 return -ENOMEM;
99ade3c7
AE		 6561
6562 nfs4_state_protect(server->nfs_client,
6563 NFS_SP4_MACH_CRED_CLEANUP,
6564 &task_setup_data.rpc_client, &msg);
6565
fe650407
TM		 6566 data->args.fhandle = &data->fh;
6567 data->args.stateid = &data->stateid;
332d1a03
TM		 6568 nfs4_bitmask_set(data->args.bitmask_store,
6569 server->cache_consistency_bitmask, inode, server,
6570 NULL);
6571 data->args.bitmask = data->args.bitmask_store;
fe650407 6572 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 6573 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 6574 data->res.fattr = &data->fattr;
6575 data->res.server = server;
586f1c39 6576 data->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
4d796d75 6577 data->lr.arg.ld_private = &data->lr.ld_private;
5138fde0 6578 nfs_fattr_init(data->res.fattr);
26e976a8 6579 data->timestamp = jiffies;
fe650407 6580 data->rpc_status = 0;
ea7c38fe 6581 data->inode = nfs_igrab_and_active(inode);
078000d0
TM		 6582 if (data->inode || issync) {
6583 data->lr.roc = pnfs_roc(inode, &data->lr.arg, &data->lr.res,
6584 cred);
1c5bd76d
TM		 6585 if (data->lr.roc) {
6586 data->args.lr_args = &data->lr.arg;
6587 data->res.lr_res = &data->lr.res;
6588 }
6589 }
fe650407 6590
dfe1fe75
TM		 6591 if (!data->inode)
6592 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1,
6593 1);
6594 else
6595 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1,
6596 0);
c970aa85 6597 task_setup_data.callback_data = data;
1174dd1f
TM		 6598 msg.rpc_argp = &data->args;
6599 msg.rpc_resp = &data->res;
c970aa85 6600 task = rpc_run_task(&task_setup_data);
7a1218a2 6601 if (IS_ERR(task))
fe650407 6602 return PTR_ERR(task);
e6f81075
TM		 6603 if (!issync)
6604 goto out;
820bf85c 6605 status = rpc_wait_for_completion_task(task);
e6f81075
TM		 6606 if (status != 0)
6607 goto out;
6608 status = data->rpc_status;
e6f81075 6609out:
e6b3c4db 6610 rpc_put_task(task);
fe650407 6611 return status;
1da177e4
LT		 6612}
6613
a52458b4 6614int nfs4_proc_delegreturn(struct inode *inode, const struct cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 6615{
6616 struct nfs_server *server = NFS_SERVER(inode);
6617 struct nfs4_exception exception = { };
6618 int err;
6619 do {
e6f81075 6620 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
48c9579a 6621 trace_nfs4_delegreturn(inode, stateid, err);
1da177e4
LT		 6622 switch (err) {
6623 case -NFS4ERR_STALE_STATEID:
6624 case -NFS4ERR_EXPIRED:
1da177e4
LT		 6625 case 0:
6626 return 0;
6627 }
6628 err = nfs4_handle_exception(server, err, &exception);
6629 } while (exception.retry);
6630 return err;
6631}
6632
1da177e4
LT		 6633static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6634{
6635 struct inode *inode = state->inode;
6636 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 6637 struct nfs_client *clp = server->nfs_client;
911d1aaf 6638 struct nfs_lockt_args arg = {
1da177e4 6639 .fh = NFS_FH(inode),
911d1aaf 6640 .fl = request,
1da177e4 6641 };
911d1aaf
TM		 6642 struct nfs_lockt_res res = {
6643 .denied = request,
1da177e4
LT		 6644 };
6645 struct rpc_message msg = {
6646 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
d9b67e1e
AS		 6647 .rpc_argp = &arg,
6648 .rpc_resp = &res,
1da177e4
LT		 6649 .rpc_cred = state->owner->so_cred,
6650 };
1da177e4
LT		 6651 struct nfs4_lock_state *lsp;
6652 int status;
6653
911d1aaf 6654 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 6655 status = nfs4_set_lock_state(state, request);
6656 if (status != 0)
6657 goto out;
6658 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 6659 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 6660 arg.lock_owner.s_dev = server->s_dev;
7c513058 6661 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 6662 switch (status) {
6663 case 0:
6664 request->fl_type = F_UNLCK;
6665 break;
6666 case -NFS4ERR_DENIED:
6667 status = 0;
1da177e4 6668 }
70cc6487 6669 request->fl_ops->fl_release_private(request);
a6f951dd 6670 request->fl_ops = NULL;
8d0a8a9d 6671out:
1da177e4
LT		 6672 return status;
6673}
6674
6675static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6676{
0688e64b
TM		 6677 struct nfs4_exception exception = {
6678 .interruptible = true,
6679 };
1da177e4
LT		 6680 int err;
6681
6682 do {
d1b748a5
TM		 6683 err = _nfs4_proc_getlk(state, cmd, request);
6684 trace_nfs4_get_lock(request, state, cmd, err);
6685 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
1da177e4
LT		 6686 &exception);
6687 } while (exception.retry);
6688 return err;
6689}
6690
32c6e7ee
TM		 6691/*
6692 * Update the seqid of a lock stateid after receiving
6693 * NFS4ERR_OLD_STATEID
6694 */
6695static bool nfs4_refresh_lock_old_stateid(nfs4_stateid *dst,
6696 struct nfs4_lock_state *lsp)
6697{
6698 struct nfs4_state *state = lsp->ls_state;
6699 bool ret = false;
6700
6701 spin_lock(&state->state_lock);
6702 if (!nfs4_stateid_match_other(dst, &lsp->ls_stateid))
6703 goto out;
6704 if (!nfs4_stateid_is_newer(&lsp->ls_stateid, dst))
6705 nfs4_stateid_seqid_inc(dst);
6706 else
6707 dst->seqid = lsp->ls_stateid.seqid;
6708 ret = true;
6709out:
6710 spin_unlock(&state->state_lock);
6711 return ret;
6712}
6713
6714static bool nfs4_sync_lock_stateid(nfs4_stateid *dst,
6715 struct nfs4_lock_state *lsp)
6716{
6717 struct nfs4_state *state = lsp->ls_state;
6718 bool ret;
6719
6720 spin_lock(&state->state_lock);
6721 ret = !nfs4_stateid_match_other(dst, &lsp->ls_stateid);
6722 nfs4_stateid_copy(dst, &lsp->ls_stateid);
6723 spin_unlock(&state->state_lock);
6724 return ret;
6725}
6726
faf5f49c 6727struct nfs4_unlockdata {
911d1aaf
TM		 6728 struct nfs_locku_args arg;
6729 struct nfs_locku_res res;
faf5f49c
TM		 6730 struct nfs4_lock_state *lsp;
6731 struct nfs_open_context *ctx;
f30cb757 6732 struct nfs_lock_context *l_ctx;
911d1aaf 6733 struct file_lock fl;
516285eb 6734 struct nfs_server *server;
26e976a8 6735 unsigned long timestamp;
faf5f49c
TM		 6736};
6737
911d1aaf
TM		 6738static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
6739 struct nfs_open_context *ctx,
6740 struct nfs4_lock_state *lsp,
6741 struct nfs_seqid *seqid)
6742{
6743 struct nfs4_unlockdata *p;
32c6e7ee
TM		 6744 struct nfs4_state *state = lsp->ls_state;
6745 struct inode *inode = state->inode;
911d1aaf 6746
8535b2be 6747 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 6748 if (p == NULL)
6749 return NULL;
6750 p->arg.fh = NFS_FH(inode);
6751 p->arg.fl = &p->fl;
6752 p->arg.seqid = seqid;
c1d51931 6753 p->res.seqid = seqid;
911d1aaf 6754 p->lsp = lsp;
911d1aaf
TM		 6755 /* Ensure we don't close file until we're done freeing locks! */
6756 p->ctx = get_nfs_open_context(ctx);
f30cb757 6757 p->l_ctx = nfs_get_lock_context(ctx);
7b587e1a
N		 6758 locks_init_lock(&p->fl);
6759 locks_copy_lock(&p->fl, fl);
911d1aaf 6760 p->server = NFS_SERVER(inode);
32c6e7ee
TM		 6761 spin_lock(&state->state_lock);
6762 nfs4_stateid_copy(&p->arg.stateid, &lsp->ls_stateid);
6763 spin_unlock(&state->state_lock);
911d1aaf
TM		 6764 return p;
6765}
6766
06f814a3 6767static void nfs4_locku_release_calldata(void *data)
faf5f49c 6768{
963d8fe5 6769 struct nfs4_unlockdata *calldata = data;
911d1aaf 6770 nfs_free_seqid(calldata->arg.seqid);
06f814a3 6771 nfs4_put_lock_state(calldata->lsp);
f30cb757 6772 nfs_put_lock_context(calldata->l_ctx);
06f814a3
TM		 6773 put_nfs_open_context(calldata->ctx);
6774 kfree(calldata);
faf5f49c
TM		 6775}
6776
963d8fe5 6777static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 6778{
963d8fe5 6779 struct nfs4_unlockdata *calldata = data;
82571552
TM		 6780 struct nfs4_exception exception = {
6781 .inode = calldata->lsp->ls_state->inode,
6782 .stateid = &calldata->arg.stateid,
6783 };
faf5f49c 6784
14516c3a
TM		 6785 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
6786 return;
faf5f49c
TM		 6787 switch (task->tk_status) {
6788 case 0:
26e976a8 6789 renew_lease(calldata->server, calldata->timestamp);
75575ddf 6790 locks_lock_inode_wait(calldata->lsp->ls_state->inode, &calldata->fl);
c69899a1
TM		 6791 if (nfs4_update_lock_stateid(calldata->lsp,
6792 &calldata->res.stateid))
6793 break;
df561f66 6794 fallthrough;
26d36301
TM		 6795 case -NFS4ERR_ADMIN_REVOKED:
6796 case -NFS4ERR_EXPIRED:
6797 nfs4_free_revoked_stateid(calldata->server,
6798 &calldata->arg.stateid,
6799 task->tk_msg.rpc_cred);
df561f66 6800 fallthrough;
9e33bed5 6801 case -NFS4ERR_BAD_STATEID:
faf5f49c 6802 case -NFS4ERR_STALE_STATEID:
32c6e7ee
TM		 6803 if (nfs4_sync_lock_stateid(&calldata->arg.stateid,
6804 calldata->lsp))
6805 rpc_restart_call_prepare(task);
6806 break;
6807 case -NFS4ERR_OLD_STATEID:
6808 if (nfs4_refresh_lock_old_stateid(&calldata->arg.stateid,
6809 calldata->lsp))
425c1d4e 6810 rpc_restart_call_prepare(task);
faf5f49c
TM		 6811 break;
6812 default:
82571552
TM		 6813 task->tk_status = nfs4_async_handle_exception(task,
6814 calldata->server, task->tk_status,
6815 &exception);
6816 if (exception.retry)
d00c5d43 6817 rpc_restart_call_prepare(task);
faf5f49c 6818 }
2b1bc308 6819 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 6820}
6821
4ce70ada 6822static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 6823{
4ce70ada 6824 struct nfs4_unlockdata *calldata = data;
faf5f49c 6825
f30cb757
BC		 6826 if (test_bit(NFS_CONTEXT_UNLOCK, &calldata->l_ctx->open_context->flags) &&
6827 nfs_async_iocounter_wait(task, calldata->l_ctx))
6828 return;
6829
911d1aaf 6830 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 6831 goto out_wait;
795a88c9 6832 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 6833 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 6834 goto out_no_action;
faf5f49c 6835 }
26e976a8 6836 calldata->timestamp = jiffies;
42e1cca7 6837 if (nfs4_setup_sequence(calldata->server->nfs_client,
a893693c 6838 &calldata->arg.seq_args,
2240a9e2
TM		 6839 &calldata->res.seq_res,
6840 task) != 0)
6841 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 6842 return;
6843out_no_action:
6844 task->tk_action = NULL;
6845out_wait:
6846 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 6847}
6848
963d8fe5 6849static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 6850 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 6851 .rpc_call_done = nfs4_locku_done,
06f814a3 6852 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 6853};
6854
a5d16a4d
TM		 6855static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
6856 struct nfs_open_context *ctx,
6857 struct nfs4_lock_state *lsp,
6858 struct nfs_seqid *seqid)
6859{
6860 struct nfs4_unlockdata *data;
5138fde0
TM		 6861 struct rpc_message msg = {
6862 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
6863 .rpc_cred = ctx->cred,
6864 };
c970aa85
TM		 6865 struct rpc_task_setup task_setup_data = {
6866 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 6867 .rpc_message = &msg,
c970aa85 6868 .callback_ops = &nfs4_locku_ops,
101070ca 6869 .workqueue = nfsiod_workqueue,
c970aa85
TM		 6870 .flags = RPC_TASK_ASYNC,
6871 };
85e39fee
OK		 6872 struct nfs_client *client =
6873 NFS_SERVER(lsp->ls_state->inode)->nfs_client;
6874
6875 if (client->cl_minorversion)
6876 task_setup_data.flags |= RPC_TASK_MOVEABLE;
a5d16a4d 6877
fa940720
WAA		 6878 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
6879 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
6880
137d6aca
FF		 6881 /* Ensure this is an unlock - when canceling a lock, the
6882 * canceled lock is passed in, and it won't be an unlock.
6883 */
6884 fl->fl_type = F_UNLCK;
f30cb757
BC		 6885 if (fl->fl_flags & FL_CLOSE)
6886 set_bit(NFS_CONTEXT_UNLOCK, &ctx->flags);
137d6aca 6887
a5d16a4d
TM		 6888 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
6889 if (data == NULL) {
6890 nfs_free_seqid(seqid);
6891 return ERR_PTR(-ENOMEM);
6892 }
6893
fba83f34 6894 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1, 0);
1174dd1f
TM		 6895 msg.rpc_argp = &data->arg;
6896 msg.rpc_resp = &data->res;
c970aa85
TM		 6897 task_setup_data.callback_data = data;
6898 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 6899}
6900
faf5f49c
TM		 6901static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
6902{
65b62a29
TM		 6903 struct inode *inode = state->inode;
6904 struct nfs4_state_owner *sp = state->owner;
6905 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 6906 struct nfs_seqid *seqid;
1da177e4 6907 struct nfs4_lock_state *lsp;
06f814a3 6908 struct rpc_task *task;
b4019c0e 6909 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
06f814a3 6910 int status = 0;
536ff0f8 6911 unsigned char fl_flags = request->fl_flags;
faf5f49c 6912
8d0a8a9d 6913 status = nfs4_set_lock_state(state, request);
9b073574
TM		 6914 /* Unlock _before_ we do the RPC call */
6915 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 6916 /* Exclude nfs_delegation_claim_locks() */
6917 mutex_lock(&sp->so_delegreturn_mutex);
6918 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57 6919 down_read(&nfsi->rwsem);
75575ddf 6920 if (locks_lock_inode_wait(inode, request) == -ENOENT) {
19e03c57 6921 up_read(&nfsi->rwsem);
65b62a29 6922 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 6923 goto out;
19e03c57
TM		 6924 }
6925 up_read(&nfsi->rwsem);
65b62a29 6926 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 6927 if (status != 0)
9b073574
TM		 6928 goto out;
6929 /* Is this a delegated lock? */
8d0a8a9d 6930 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 6931 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
6932 goto out;
b4019c0e
TM		 6933 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid;
6934 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 6935 status = -ENOMEM;
badc76dd 6936 if (IS_ERR(seqid))
9b073574 6937 goto out;
cd3758e3 6938 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 6939 status = PTR_ERR(task);
6940 if (IS_ERR(task))
9b073574 6941 goto out;
820bf85c 6942 status = rpc_wait_for_completion_task(task);
e6b3c4db 6943 rpc_put_task(task);
9b073574 6944out:
536ff0f8 6945 request->fl_flags = fl_flags;
d1b748a5 6946 trace_nfs4_unlock(request, state, F_SETLK, status);
1da177e4
LT		 6947 return status;
6948}
6949
a5d16a4d
TM		 6950struct nfs4_lockdata {
6951 struct nfs_lock_args arg;
6952 struct nfs_lock_res res;
6953 struct nfs4_lock_state *lsp;
6954 struct nfs_open_context *ctx;
6955 struct file_lock fl;
26e976a8 6956 unsigned long timestamp;
a5d16a4d
TM		 6957 int rpc_status;
6958 int cancelled;
66179efe 6959 struct nfs_server *server;
a5d16a4d
TM		 6960};
6961
6962static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 6963 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
6964 gfp_t gfp_mask)
1da177e4 6965{
a5d16a4d
TM		 6966 struct nfs4_lockdata *p;
6967 struct inode *inode = lsp->ls_state->inode;
1da177e4 6968 struct nfs_server *server = NFS_SERVER(inode);
b4019c0e 6969 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
a5d16a4d 6970
8535b2be 6971 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 6972 if (p == NULL)
6973 return NULL;
6974
6975 p->arg.fh = NFS_FH(inode);
6976 p->arg.fl = &p->fl;
8535b2be 6977 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
badc76dd 6978 if (IS_ERR(p->arg.open_seqid))
2f74c0a0 6979 goto out_free;
b4019c0e
TM		 6980 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
6981 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask);
badc76dd 6982 if (IS_ERR(p->arg.lock_seqid))
2f74c0a0 6983 goto out_free_seqid;
7539bbab 6984 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 6985 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 6986 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 6987 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 6988 p->lsp = lsp;
66179efe 6989 p->server = server;
a5d16a4d 6990 p->ctx = get_nfs_open_context(ctx);
7b587e1a
N		 6991 locks_init_lock(&p->fl);
6992 locks_copy_lock(&p->fl, fl);
a5d16a4d 6993 return p;
2f74c0a0
TM		 6994out_free_seqid:
6995 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 6996out_free:
6997 kfree(p);
6998 return NULL;
6999}
7000
7001static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
7002{
7003 struct nfs4_lockdata *data = calldata;
7004 struct nfs4_state *state = data->lsp->ls_state;
06735b34 7005
3110ff80 7006 dprintk("%s: begin!\n", __func__);
2f74c0a0 7007 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 7008 goto out_wait;
a5d16a4d 7009 /* Do we need to do an open_to_lock_owner? */
6b447539 7010 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) {
8fe72bac 7011 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 7012 goto out_release_lock_seqid;
8fe72bac 7013 }
425c1d4e
TM		 7014 nfs4_stateid_copy(&data->arg.open_stateid,
7015 &state->open_stateid);
a5d16a4d 7016 data->arg.new_lock_owner = 1;
c1d51931 7017 data->res.open_seqid = data->arg.open_seqid;
425c1d4e 7018 } else {
2f74c0a0 7019 data->arg.new_lock_owner = 0;
425c1d4e
TM		 7020 nfs4_stateid_copy(&data->arg.lock_stateid,
7021 &data->lsp->ls_stateid);
7022 }
5d422301
TM		 7023 if (!nfs4_valid_open_stateid(state)) {
7024 data->rpc_status = -EBADF;
7025 task->tk_action = NULL;
7026 goto out_release_open_seqid;
7027 }
26e976a8 7028 data->timestamp = jiffies;
42e1cca7 7029 if (nfs4_setup_sequence(data->server->nfs_client,
035168ab 7030 &data->arg.seq_args,
2240a9e2 7031 &data->res.seq_res,
d9afbd1b 7032 task) == 0)
66179efe 7033 return;
5d422301 7034out_release_open_seqid:
2240a9e2
TM		 7035 nfs_release_seqid(data->arg.open_seqid);
7036out_release_lock_seqid:
7037 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 7038out_wait:
7039 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 7040 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 7041}
7042
a5d16a4d
TM		 7043static void nfs4_lock_done(struct rpc_task *task, void *calldata)
7044{
7045 struct nfs4_lockdata *data = calldata;
39071e6f 7046 struct nfs4_lock_state *lsp = data->lsp;
a5d16a4d 7047
3110ff80 7048 dprintk("%s: begin!\n", __func__);
a5d16a4d 7049
14516c3a
TM		 7050 if (!nfs4_sequence_done(task, &data->res.seq_res))
7051 return;
66179efe 7052
a5d16a4d 7053 data->rpc_status = task->tk_status;
425c1d4e
TM		 7054 switch (task->tk_status) {
7055 case 0:
2b0143b5 7056 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)),
39071e6f 7057 data->timestamp);
a3cf9bca 7058 if (data->arg.new_lock && !data->cancelled) {
c69899a1 7059 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS);
a3cf9bca 7060 if (locks_lock_inode_wait(lsp->ls_state->inode, &data->fl) < 0)
6ea76bf5 7061 goto out_restart;
c69899a1 7062 }
39071e6f
TM		 7063 if (data->arg.new_lock_owner != 0) {
7064 nfs_confirm_seqid(&lsp->ls_seqid, 0);
7065 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid);
7066 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
6ea76bf5
TM		 7067 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid))
7068 goto out_restart;
425c1d4e
TM		 7069 break;
7070 case -NFS4ERR_BAD_STATEID:
7071 case -NFS4ERR_OLD_STATEID:
7072 case -NFS4ERR_STALE_STATEID:
7073 case -NFS4ERR_EXPIRED:
7074 if (data->arg.new_lock_owner != 0) {
6ea76bf5 7075 if (!nfs4_stateid_match(&data->arg.open_stateid,
425c1d4e 7076 &lsp->ls_state->open_stateid))
6ea76bf5
TM		 7077 goto out_restart;
7078 } else if (!nfs4_stateid_match(&data->arg.lock_stateid,
425c1d4e 7079 &lsp->ls_stateid))
6ea76bf5 7080 goto out_restart;
a5d16a4d 7081 }
a3cf9bca 7082out_done:
3110ff80 7083 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
6ea76bf5
TM		 7084 return;
7085out_restart:
7086 if (!data->cancelled)
7087 rpc_restart_call_prepare(task);
7088 goto out_done;
a5d16a4d
TM		 7089}
7090
7091static void nfs4_lock_release(void *calldata)
7092{
7093 struct nfs4_lockdata *data = calldata;
7094
3110ff80 7095 dprintk("%s: begin!\n", __func__);
2f74c0a0 7096 nfs_free_seqid(data->arg.open_seqid);
6ea76bf5 7097 if (data->cancelled && data->rpc_status == 0) {
a5d16a4d
TM		 7098 struct rpc_task *task;
7099 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
7100 data->arg.lock_seqid);
7101 if (!IS_ERR(task))
bf294b41 7102 rpc_put_task_async(task);
3110ff80 7103 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 7104 } else
7105 nfs_free_seqid(data->arg.lock_seqid);
7106 nfs4_put_lock_state(data->lsp);
7107 put_nfs_open_context(data->ctx);
7108 kfree(data);
3110ff80 7109 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 7110}
7111
7112static const struct rpc_call_ops nfs4_lock_ops = {
7113 .rpc_call_prepare = nfs4_lock_prepare,
7114 .rpc_call_done = nfs4_lock_done,
7115 .rpc_release = nfs4_lock_release,
7116};
7117
2bee72a6
TM		 7118static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
7119{
2bee72a6
TM		 7120 switch (error) {
7121 case -NFS4ERR_ADMIN_REVOKED:
d7f3e4bf 7122 case -NFS4ERR_EXPIRED:
2bee72a6 7123 case -NFS4ERR_BAD_STATEID:
ecac799a 7124 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 7125 if (new_lock_owner != 0 ||
795a88c9 7126 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 7127 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 7128 break;
7129 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 7130 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a 7131 nfs4_schedule_lease_recovery(server->nfs_client);
8b98a532 7132 }
2bee72a6
TM		 7133}
7134
afe6c27c 7135static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 7136{
7137 struct nfs4_lockdata *data;
7138 struct rpc_task *task;
5138fde0
TM		 7139 struct rpc_message msg = {
7140 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
7141 .rpc_cred = state->owner->so_cred,
7142 };
c970aa85
TM		 7143 struct rpc_task_setup task_setup_data = {
7144 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 7145 .rpc_message = &msg,
c970aa85 7146 .callback_ops = &nfs4_lock_ops,
101070ca 7147 .workqueue = nfsiod_workqueue,
61296507 7148 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF,
c970aa85 7149 };
a5d16a4d 7150 int ret;
85e39fee
OK		 7151 struct nfs_client *client = NFS_SERVER(state->inode)->nfs_client;
7152
7153 if (client->cl_minorversion)
7154 task_setup_data.flags |= RPC_TASK_MOVEABLE;
a5d16a4d 7155
3110ff80 7156 dprintk("%s: begin!\n", __func__);
cd3758e3 7157 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 7158 fl->fl_u.nfs4_fl.owner,
7159 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 7160 if (data == NULL)
7161 return -ENOMEM;
7162 if (IS_SETLKW(cmd))
7163 data->arg.block = 1;
fba83f34
AS		 7164 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1,
7165 recovery_type > NFS_LOCK_NEW);
1174dd1f
TM		 7166 msg.rpc_argp = &data->arg;
7167 msg.rpc_resp = &data->res;
c970aa85 7168 task_setup_data.callback_data = data;
8fe72bac
TM		 7169 if (recovery_type > NFS_LOCK_NEW) {
7170 if (recovery_type == NFS_LOCK_RECLAIM)
7171 data->arg.reclaim = NFS_LOCK_RECLAIM;
c69899a1
TM		 7172 } else
7173 data->arg.new_lock = 1;
c970aa85 7174 task = rpc_run_task(&task_setup_data);
7a1218a2 7175 if (IS_ERR(task))
a5d16a4d 7176 return PTR_ERR(task);
820bf85c 7177 ret = rpc_wait_for_completion_task(task);
a5d16a4d
TM		 7178 if (ret == 0) {
7179 ret = data->rpc_status;
2bee72a6
TM		 7180 if (ret)
7181 nfs4_handle_setlk_error(data->server, data->lsp,
7182 data->arg.new_lock_owner, ret);
a5d16a4d 7183 } else
a7a3b1e9 7184 data->cancelled = true;
3d1a90ab 7185 trace_nfs4_set_lock(fl, state, &data->res.stateid, cmd, ret);
e6b3c4db 7186 rpc_put_task(task);
3110ff80 7187 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 7188 return ret;
1da177e4
LT		 7189}
7190
7191static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
7192{
202b50dc 7193 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 7194 struct nfs4_exception exception = {
7195 .inode = state->inode,
7196 };
202b50dc
TM		 7197 int err;
7198
7199 do {
42a2d13e
TM		 7200 /* Cache the lock if possible... */
7201 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
7202 return 0;
afe6c27c 7203 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 7204 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 7205 break;
7206 nfs4_handle_exception(server, err, &exception);
7207 } while (exception.retry);
7208 return err;
1da177e4
LT		 7209}
7210
7211static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
7212{
202b50dc 7213 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 7214 struct nfs4_exception exception = {
7215 .inode = state->inode,
7216 };
202b50dc
TM		 7217 int err;
7218
6bfc93ef
TM		 7219 err = nfs4_set_lock_state(state, request);
7220 if (err != 0)
7221 return err;
f6de7a39 7222 if (!recover_lost_locks) {
ef1820f9
N		 7223 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
7224 return 0;
7225 }
202b50dc 7226 do {
42a2d13e
TM		 7227 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
7228 return 0;
afe6c27c 7229 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 7230 switch (err) {
7231 default:
7232 goto out;
7233 case -NFS4ERR_GRACE:
7234 case -NFS4ERR_DELAY:
7235 nfs4_handle_exception(server, err, &exception);
7236 err = 0;
7237 }
202b50dc 7238 } while (exception.retry);
a9ed2e25 7239out:
202b50dc 7240 return err;
1da177e4
LT		 7241}
7242
f062eb6c 7243#if defined(CONFIG_NFS_V4_1)
b01dd1d8
BS		 7244static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
7245{
c5896fc8
TM		 7246 struct nfs4_lock_state *lsp;
7247 int status;
b01dd1d8 7248
c5896fc8
TM		 7249 status = nfs4_set_lock_state(state, request);
7250 if (status != 0)
7251 return status;
7252 lsp = request->fl_u.nfs4_fl.owner;
7253 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) ||
7254 test_bit(NFS_LOCK_LOST, &lsp->ls_flags))
7255 return 0;
81b68de4 7256 return nfs4_lock_expired(state, request);
f062eb6c
BS		 7257}
7258#endif
7259
1da177e4
LT		 7260static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
7261{
19e03c57 7262 struct nfs_inode *nfsi = NFS_I(state->inode);
11476e9d 7263 struct nfs4_state_owner *sp = state->owner;
01c3b861 7264 unsigned char fl_flags = request->fl_flags;
1ea67dbd 7265 int status;
1da177e4 7266
01c3b861 7267 request->fl_flags |= FL_ACCESS;
75575ddf 7268 status = locks_lock_inode_wait(state->inode, request);
01c3b861
TM		 7269 if (status < 0)
7270 goto out;
11476e9d 7271 mutex_lock(&sp->so_delegreturn_mutex);
19e03c57 7272 down_read(&nfsi->rwsem);
01c3b861 7273 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 7274 /* Yes: cache locks! */
01c3b861 7275 /* ...but avoid races with delegation recall... */
19e03c57 7276 request->fl_flags = fl_flags & ~FL_SLEEP;
75575ddf 7277 status = locks_lock_inode_wait(state->inode, request);
c69899a1 7278 up_read(&nfsi->rwsem);
11476e9d 7279 mutex_unlock(&sp->so_delegreturn_mutex);
9a99af49 7280 goto out;
9a99af49 7281 }
19e03c57 7282 up_read(&nfsi->rwsem);
11476e9d 7283 mutex_unlock(&sp->so_delegreturn_mutex);
c69899a1 7284 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
01c3b861
TM		 7285out:
7286 request->fl_flags = fl_flags;
1da177e4
LT		 7287 return status;
7288}
7289
7290static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
7291{
a1d0b5ee
TM		 7292 struct nfs4_exception exception = {
7293 .state = state,
05ffe24f 7294 .inode = state->inode,
0688e64b 7295 .interruptible = true,
a1d0b5ee 7296 };
1da177e4
LT		 7297 int err;
7298
7299 do {
965b5d67
TM		 7300 err = _nfs4_proc_setlk(state, cmd, request);
7301 if (err == -NFS4ERR_DENIED)
7302 err = -EAGAIN;
1da177e4 7303 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 7304 err, &exception);
1da177e4
LT		 7305 } while (exception.retry);
7306 return err;
7307}
7308
d2f3a7f9
JL		 7309#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
7310#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
7311
7312static int
a1d617d8
JL		 7313nfs4_retry_setlk_simple(struct nfs4_state *state, int cmd,
7314 struct file_lock *request)
d2f3a7f9
JL		 7315{
7316 int status = -ERESTARTSYS;
7317 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
7318
7319 while(!signalled()) {
7320 status = nfs4_proc_setlk(state, cmd, request);
7321 if ((status != -EAGAIN) || IS_SETLK(cmd))
7322 break;
7323 freezable_schedule_timeout_interruptible(timeout);
7324 timeout *= 2;
7325 timeout = min_t(unsigned long, NFS4_LOCK_MAXTIMEOUT, timeout);
7326 status = -ERESTARTSYS;
7327 }
7328 return status;
7329}
7330
a1d617d8
JL		 7331#ifdef CONFIG_NFS_V4_1
7332struct nfs4_lock_waiter {
a1d617d8 7333 struct inode *inode;
86438186
TM		 7334 struct nfs_lowner owner;
7335 wait_queue_entry_t wait;
a1d617d8
JL		 7336};
7337
7338static int
ac6424b9 7339nfs4_wake_lock_waiter(wait_queue_entry_t *wait, unsigned int mode, int flags, void *key)
a1d617d8 7340{
86438186
TM		 7341 struct nfs4_lock_waiter *waiter =
7342 container_of(wait, struct nfs4_lock_waiter, wait);
a1d617d8 7343
57174593
JL		 7344 /* NULL key means to wake up everyone */
7345 if (key) {
7346 struct cb_notify_lock_args *cbnl = key;
7347 struct nfs_lowner *lowner = &cbnl->cbnl_owner,
86438186 7348 *wowner = &waiter->owner;
a1d617d8 7349
57174593
JL		 7350 /* Only wake if the callback was for the same owner. */
7351 if (lowner->id != wowner->id || lowner->s_dev != wowner->s_dev)
7352 return 0;
a1d617d8 7353
57174593
JL		 7354 /* Make sure it's for the right inode */
7355 if (nfs_compare_fh(NFS_FH(waiter->inode), &cbnl->cbnl_fh))
7356 return 0;
57174593 7357 }
a1d617d8 7358
86438186 7359 return woken_wake_function(wait, mode, flags, key);
a1d617d8
JL		 7360}
7361
7362static int
7363nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
7364{
a1d617d8
JL		 7365 struct nfs4_lock_state *lsp = request->fl_u.nfs4_fl.owner;
7366 struct nfs_server *server = NFS_SERVER(state->inode);
7367 struct nfs_client *clp = server->nfs_client;
7368 wait_queue_head_t *q = &clp->cl_lock_waitq;
86438186
TM		 7369 struct nfs4_lock_waiter waiter = {
7370 .inode = state->inode,
7371 .owner = { .clientid = clp->cl_clientid,
7372 .id = lsp->ls_seqid.owner_id,
7373 .s_dev = server->s_dev },
7374 };
7375 int status;
a1d617d8
JL		 7376
7377 /* Don't bother with waitqueue if we don't expect a callback */
7378 if (!test_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags))
7379 return nfs4_retry_setlk_simple(state, cmd, request);
7380
86438186
TM		 7381 init_wait(&waiter.wait);
7382 waiter.wait.func = nfs4_wake_lock_waiter;
7383 add_wait_queue(q, &waiter.wait);
a1d617d8 7384
86438186 7385 do {
a1d617d8 7386 status = nfs4_proc_setlk(state, cmd, request);
86438186 7387 if (status != -EAGAIN || IS_SETLK(cmd))
a1d617d8
JL		 7388 break;
7389
7390 status = -ERESTARTSYS;
52b042ab 7391 freezer_do_not_count();
86438186
TM		 7392 wait_woken(&waiter.wait, TASK_INTERRUPTIBLE,
7393 NFS4_LOCK_MAXTIMEOUT);
52b042ab 7394 freezer_count();
86438186
TM		 7395 } while (!signalled());
7396
7397 remove_wait_queue(q, &waiter.wait);
a1d617d8 7398
a1d617d8
JL		 7399 return status;
7400}
7401#else /* !CONFIG_NFS_V4_1 */
7402static inline int
7403nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
7404{
7405 return nfs4_retry_setlk_simple(state, cmd, request);
7406}
7407#endif
7408
1da177e4
LT		 7409static int
7410nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
7411{
7412 struct nfs_open_context *ctx;
7413 struct nfs4_state *state;
1da177e4
LT		 7414 int status;
7415
7416 /* verify open state */
cd3758e3 7417 ctx = nfs_file_open_context(filp);
1da177e4
LT		 7418 state = ctx->state;
7419
d953126a
TM		 7420 if (IS_GETLK(cmd)) {
7421 if (state != NULL)
7422 return nfs4_proc_getlk(state, F_GETLK, request);
7423 return 0;
7424 }
1da177e4
LT		 7425
7426 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
7427 return -EINVAL;
7428
d953126a
TM		 7429 if (request->fl_type == F_UNLCK) {
7430 if (state != NULL)
7431 return nfs4_proc_unlck(state, cmd, request);
7432 return 0;
7433 }
1da177e4 7434
d953126a
TM		 7435 if (state == NULL)
7436 return -ENOLCK;
1ea67dbd
JL		 7437
7438 if ((request->fl_flags & FL_POSIX) &&
7439 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
7440 return -ENOLCK;
7441
fcfa4470
BC		 7442 /*
7443 * Don't rely on the VFS having checked the file open mode,
7444 * since it won't do this for flock() locks.
7445 */
7446 switch (request->fl_type) {
7447 case F_RDLCK:
7448 if (!(filp->f_mode & FMODE_READ))
7449 return -EBADF;
7450 break;
7451 case F_WRLCK:
7452 if (!(filp->f_mode & FMODE_WRITE))
7453 return -EBADF;
7454 }
7455
1ea67dbd
JL		 7456 status = nfs4_set_lock_state(state, request);
7457 if (status != 0)
7458 return status;
7459
d2f3a7f9 7460 return nfs4_retry_setlk(state, cmd, request);
1da177e4
LT		 7461}
7462
e93a5e93
TM		 7463static int nfs4_delete_lease(struct file *file, void **priv)
7464{
7465 return generic_setlease(file, F_UNLCK, NULL, priv);
7466}
7467
7468static int nfs4_add_lease(struct file *file, long arg, struct file_lock **lease,
7469 void **priv)
7470{
7471 struct inode *inode = file_inode(file);
7472 fmode_t type = arg == F_RDLCK ? FMODE_READ : FMODE_WRITE;
7473 int ret;
7474
7475 /* No delegation, no lease */
7476 if (!nfs4_have_delegation(inode, type))
df2c7b95 7477 return -EAGAIN;
e93a5e93
TM		 7478 ret = generic_setlease(file, arg, lease, priv);
7479 if (ret || nfs4_have_delegation(inode, type))
7480 return ret;
7481 /* We raced with a delegation return */
7482 nfs4_delete_lease(file, priv);
df2c7b95 7483 return -EAGAIN;
e93a5e93
TM		 7484}
7485
7486int nfs4_proc_setlease(struct file *file, long arg, struct file_lock **lease,
7487 void **priv)
7488{
7489 switch (arg) {
7490 case F_RDLCK:
7491 case F_WRLCK:
7492 return nfs4_add_lease(file, arg, lease, priv);
7493 case F_UNLCK:
7494 return nfs4_delete_lease(file, priv);
7495 default:
7496 return -EINVAL;
7497 }
7498}
7499
db4f2e63 7500int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 7501{
7502 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 7503 int err;
7504
7505 err = nfs4_set_lock_state(state, fl);
7506 if (err != 0)
db4f2e63 7507 return err;
3d7a9520
OK		 7508 do {
7509 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
7510 if (err != -NFS4ERR_DELAY)
7511 break;
7512 ssleep(1);
7513 } while (err == -NFS4ERR_DELAY);
dce2630c 7514 return nfs4_handle_delegation_recall_error(server, state, stateid, fl, err);
888e694c 7515}
6b3b5496 7516
cf470c3e
TM		 7517struct nfs_release_lockowner_data {
7518 struct nfs4_lock_state *lsp;
5ae67c4f 7519 struct nfs_server *server;
cf470c3e 7520 struct nfs_release_lockowner_args args;
b7e63a10 7521 struct nfs_release_lockowner_res res;
60ea6812 7522 unsigned long timestamp;
cf470c3e
TM		 7523};
7524
fbd4bfd1
CL		 7525static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
7526{
7527 struct nfs_release_lockowner_data *data = calldata;
5b53dc88 7528 struct nfs_server *server = data->server;
7981c8a6
AS		 7529 nfs4_setup_sequence(server->nfs_client, &data->args.seq_args,
7530 &data->res.seq_res, task);
5b53dc88 7531 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
60ea6812 7532 data->timestamp = jiffies;
fbd4bfd1
CL		 7533}
7534
7535static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
7536{
7537 struct nfs_release_lockowner_data *data = calldata;
60ea6812
CL		 7538 struct nfs_server *server = data->server;
7539
b7e63a10 7540 nfs40_sequence_done(task, &data->res.seq_res);
60ea6812
CL		 7541
7542 switch (task->tk_status) {
7543 case 0:
7544 renew_lease(server, data->timestamp);
7545 break;
7546 case -NFS4ERR_STALE_CLIENTID:
7547 case -NFS4ERR_EXPIRED:
5b53dc88
KM		 7548 nfs4_schedule_lease_recovery(server->nfs_client);
7549 break;
60ea6812
CL		 7550 case -NFS4ERR_LEASE_MOVED:
7551 case -NFS4ERR_DELAY:
8478eaa1
N		 7552 if (nfs4_async_handle_error(task, server,
7553 NULL, NULL) == -EAGAIN)
60ea6812
CL		 7554 rpc_restart_call_prepare(task);
7555 }
fbd4bfd1
CL		 7556}
7557
d3c7b7cc
TM		 7558static void nfs4_release_lockowner_release(void *calldata)
7559{
cf470c3e 7560 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 7561 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 7562 kfree(calldata);
7563}
7564
17280175 7565static const struct rpc_call_ops nfs4_release_lockowner_ops = {
fbd4bfd1
CL		 7566 .rpc_call_prepare = nfs4_release_lockowner_prepare,
7567 .rpc_call_done = nfs4_release_lockowner_done,
d3c7b7cc
TM		 7568 .rpc_release = nfs4_release_lockowner_release,
7569};
7570
f1cdae87
JL		 7571static void
7572nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 7573{
cf470c3e 7574 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 7575 struct rpc_message msg = {
7576 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
7577 };
7578
7579 if (server->nfs_client->cl_mvops->minor_version != 0)
f1cdae87 7580 return;
fbd4bfd1 7581
cf470c3e
TM		 7582 data = kmalloc(sizeof(*data), GFP_NOFS);
7583 if (!data)
f1cdae87 7584 return;
cf470c3e 7585 data->lsp = lsp;
5ae67c4f 7586 data->server = server;
cf470c3e
TM		 7587 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
7588 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
7589 data->args.lock_owner.s_dev = server->s_dev;
fbd4bfd1 7590
cf470c3e 7591 msg.rpc_argp = &data->args;
b7e63a10 7592 msg.rpc_resp = &data->res;
fba83f34 7593 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0, 0);
cf470c3e 7594 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
d3c7b7cc
TM		 7595}
7596
aa1870af
BF		 7597#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
7598
d9a82a04 7599static int nfs4_xattr_set_nfs4_acl(const struct xattr_handler *handler,
e65ce2a5 7600 struct user_namespace *mnt_userns,
59301226
AV		 7601 struct dentry *unused, struct inode *inode,
7602 const char *key, const void *buf,
7603 size_t buflen, int flags)
6b3b5496 7604{
59301226 7605 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 7606}
7607
d9a82a04 7608static int nfs4_xattr_get_nfs4_acl(const struct xattr_handler *handler,
b296821a
AV		 7609 struct dentry *unused, struct inode *inode,
7610 const char *key, void *buf, size_t buflen)
6b3b5496 7611{
b296821a 7612 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 7613}
7614
764a5c6b 7615static bool nfs4_xattr_list_nfs4_acl(struct dentry *dentry)
6b3b5496 7616{
764a5c6b 7617 return nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry)));
6b3b5496
BF		 7618}
7619
c9bccef6 7620#ifdef CONFIG_NFS_V4_SECURITY_LABEL
c9bccef6 7621
d9a82a04 7622static int nfs4_xattr_set_nfs4_label(const struct xattr_handler *handler,
e65ce2a5 7623 struct user_namespace *mnt_userns,
59301226
AV		 7624 struct dentry *unused, struct inode *inode,
7625 const char *key, const void *buf,
7626 size_t buflen, int flags)
c9bccef6
DQ		 7627{
7628 if (security_ismaclabel(key))
59301226 7629 return nfs4_set_security_label(inode, buf, buflen);
c9bccef6
DQ		 7630
7631 return -EOPNOTSUPP;
7632}
7633
d9a82a04 7634static int nfs4_xattr_get_nfs4_label(const struct xattr_handler *handler,
b296821a
AV		 7635 struct dentry *unused, struct inode *inode,
7636 const char *key, void *buf, size_t buflen)
c9bccef6
DQ		 7637{
7638 if (security_ismaclabel(key))
b296821a 7639 return nfs4_get_security_label(inode, buf, buflen);
c9bccef6
DQ		 7640 return -EOPNOTSUPP;
7641}
7642
c4803c49
AG		 7643static ssize_t
7644nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
c9bccef6 7645{
c4803c49 7646 int len = 0;
c9bccef6 7647
c4803c49
AG		 7648 if (nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) {
7649 len = security_inode_listsecurity(inode, list, list_len);
82c596eb 7650 if (len >= 0 && list_len && len > list_len)
c4803c49 7651 return -ERANGE;
c9bccef6
DQ		 7652 }
7653 return len;
7654}
7655
7656static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
7657 .prefix = XATTR_SECURITY_PREFIX,
c9bccef6
DQ		 7658 .get = nfs4_xattr_get_nfs4_label,
7659 .set = nfs4_xattr_set_nfs4_label,
7660};
c9bccef6 7661
c4803c49
AG		 7662#else
7663
7664static ssize_t
7665nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
7666{
7667 return 0;
7668}
7669
7670#endif
c9bccef6 7671
012a211a
FL		 7672#ifdef CONFIG_NFS_V4_2
7673static int nfs4_xattr_set_nfs4_user(const struct xattr_handler *handler,
e65ce2a5 7674 struct user_namespace *mnt_userns,
012a211a
FL		 7675 struct dentry *unused, struct inode *inode,
7676 const char *key, const void *buf,
7677 size_t buflen, int flags)
7678{
7679 struct nfs_access_entry cache;
95ad37f9 7680 int ret;
012a211a
FL		 7681
7682 if (!nfs_server_capable(inode, NFS_CAP_XATTR))
7683 return -EOPNOTSUPP;
7684
7685 /*
7686 * There is no mapping from the MAY_* flags to the NFS_ACCESS_XA*
7687 * flags right now. Handling of xattr operations use the normal
7688 * file read/write permissions.
7689 *
7690 * Just in case the server has other ideas (which RFC 8276 allows),
7691 * do a cached access check for the XA* flags to possibly avoid
7692 * doing an RPC and getting EACCES back.
7693 */
7694 if (!nfs_access_get_cached(inode, current_cred(), &cache, true)) {
7695 if (!(cache.mask & NFS_ACCESS_XAWRITE))
7696 return -EACCES;
7697 }
7698
95ad37f9
FL		 7699 if (buf == NULL) {
7700 ret = nfs42_proc_removexattr(inode, key);
7701 if (!ret)
7702 nfs4_xattr_cache_remove(inode, key);
7703 } else {
7704 ret = nfs42_proc_setxattr(inode, key, buf, buflen, flags);
7705 if (!ret)
7706 nfs4_xattr_cache_add(inode, key, buf, NULL, buflen);
7707 }
7708
7709 return ret;
012a211a
FL		 7710}
7711
7712static int nfs4_xattr_get_nfs4_user(const struct xattr_handler *handler,
7713 struct dentry *unused, struct inode *inode,
7714 const char *key, void *buf, size_t buflen)
7715{
7716 struct nfs_access_entry cache;
95ad37f9 7717 ssize_t ret;
012a211a
FL		 7718
7719 if (!nfs_server_capable(inode, NFS_CAP_XATTR))
7720 return -EOPNOTSUPP;
7721
7722 if (!nfs_access_get_cached(inode, current_cred(), &cache, true)) {
7723 if (!(cache.mask & NFS_ACCESS_XAREAD))
7724 return -EACCES;
7725 }
7726
1f3208b2 7727 ret = nfs_revalidate_inode(inode, NFS_INO_INVALID_CHANGE);
95ad37f9
FL		 7728 if (ret)
7729 return ret;
7730
7731 ret = nfs4_xattr_cache_get(inode, key, buf, buflen);
7732 if (ret >= 0 || (ret < 0 && ret != -ENOENT))
7733 return ret;
7734
7735 ret = nfs42_proc_getxattr(inode, key, buf, buflen);
7736
7737 return ret;
012a211a
FL		 7738}
7739
7740static ssize_t
7741nfs4_listxattr_nfs4_user(struct inode *inode, char *list, size_t list_len)
7742{
7743 u64 cookie;
7744 bool eof;
95ad37f9 7745 ssize_t ret, size;
012a211a
FL		 7746 char *buf;
7747 size_t buflen;
7748 struct nfs_access_entry cache;
7749
7750 if (!nfs_server_capable(inode, NFS_CAP_XATTR))
7751 return 0;
7752
7753 if (!nfs_access_get_cached(inode, current_cred(), &cache, true)) {
7754 if (!(cache.mask & NFS_ACCESS_XALIST))
7755 return 0;
7756 }
7757
1f3208b2 7758 ret = nfs_revalidate_inode(inode, NFS_INO_INVALID_CHANGE);
95ad37f9
FL		 7759 if (ret)
7760 return ret;
7761
7762 ret = nfs4_xattr_cache_list(inode, list, list_len);
7763 if (ret >= 0 || (ret < 0 && ret != -ENOENT))
7764 return ret;
7765
012a211a
FL		 7766 cookie = 0;
7767 eof = false;
7768 buflen = list_len ? list_len : XATTR_LIST_MAX;
7769 buf = list_len ? list : NULL;
7770 size = 0;
7771
7772 while (!eof) {
7773 ret = nfs42_proc_listxattrs(inode, buf, buflen,
7774 &cookie, &eof);
7775 if (ret < 0)
7776 return ret;
7777
7778 if (list_len) {
7779 buf += ret;
7780 buflen -= ret;
7781 }
7782 size += ret;
7783 }
7784
95ad37f9
FL		 7785 if (list_len)
7786 nfs4_xattr_cache_set_list(inode, list, size);
7787
012a211a
FL		 7788 return size;
7789}
7790
7791#else
7792
7793static ssize_t
7794nfs4_listxattr_nfs4_user(struct inode *inode, char *list, size_t list_len)
7795{
7796 return 0;
7797}
7798#endif /* CONFIG_NFS_V4_2 */
7799
533eb461
AA		 7800/*
7801 * nfs_fhget will use either the mounted_on_fileid or the fileid
7802 */
69aaaae1
TM		 7803static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
7804{
533eb461
AA		 7805 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
7806 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
7807 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 7808 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 7809 return;
7810
7811 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 7812 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 7813 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
7814 fattr->nlink = 2;
7815}
7816
f05d147f
BS		 7817static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
7818 const struct qstr *name,
7819 struct nfs4_fs_locations *fs_locations,
7820 struct page *page)
683b57b4
TM		 7821{
7822 struct nfs_server *server = NFS_SERVER(dir);
c05cefcc 7823 u32 bitmask[3];
683b57b4
TM		 7824 struct nfs4_fs_locations_arg args = {
7825 .dir_fh = NFS_FH(dir),
c228fd3a 7826 .name = name,
683b57b4
TM		 7827 .page = page,
7828 .bitmask = bitmask,
7829 };
22958463
BH		 7830 struct nfs4_fs_locations_res res = {
7831 .fs_locations = fs_locations,
7832 };
683b57b4
TM		 7833 struct rpc_message msg = {
7834 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
7835 .rpc_argp = &args,
22958463 7836 .rpc_resp = &res,
683b57b4
TM		 7837 };
7838 int status;
7839
3110ff80 7840 dprintk("%s: start\n", __func__);
533eb461 7841
c05cefcc
CL		 7842 bitmask[0] = nfs4_fattr_bitmap[0] | FATTR4_WORD0_FS_LOCATIONS;
7843 bitmask[1] = nfs4_fattr_bitmap[1];
7844
533eb461
AA		 7845 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
7846 * is not supported */
7847 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
c05cefcc 7848 bitmask[0] &= ~FATTR4_WORD0_FILEID;
533eb461 7849 else
c05cefcc 7850 bitmask[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
533eb461 7851
c228fd3a 7852 nfs_fattr_init(&fs_locations->fattr);
683b57b4 7853 fs_locations->server = server;
830b8e33 7854 fs_locations->nlocations = 0;
f05d147f 7855 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 7856 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 7857 return status;
7858}
7859
f05d147f
BS		 7860int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
7861 const struct qstr *name,
7862 struct nfs4_fs_locations *fs_locations,
7863 struct page *page)
db0a9593 7864{
0688e64b
TM		 7865 struct nfs4_exception exception = {
7866 .interruptible = true,
7867 };
db0a9593
BS		 7868 int err;
7869 do {
078ea3df
TM		 7870 err = _nfs4_proc_fs_locations(client, dir, name,
7871 fs_locations, page);
7872 trace_nfs4_get_fs_locations(dir, name, err);
7873 err = nfs4_handle_exception(NFS_SERVER(dir), err,
db0a9593
BS		 7874 &exception);
7875 } while (exception.retry);
7876 return err;
7877}
7878
b03d735b
CL		 7879/*
7880 * This operation also signals the server that this client is
7881 * performing migration recovery. The server can stop returning
7882 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
7883 * appended to this compound to identify the client ID which is
7884 * performing recovery.
7885 */
7886static int _nfs40_proc_get_locations(struct inode *inode,
7887 struct nfs4_fs_locations *locations,
a52458b4 7888 struct page *page, const struct cred *cred)
b03d735b
CL		 7889{
7890 struct nfs_server *server = NFS_SERVER(inode);
7891 struct rpc_clnt *clnt = server->client;
7892 u32 bitmask[2] = {
7893 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
7894 };
7895 struct nfs4_fs_locations_arg args = {
7896 .clientid = server->nfs_client->cl_clientid,
7897 .fh = NFS_FH(inode),
7898 .page = page,
7899 .bitmask = bitmask,
7900 .migration = 1, /* skip LOOKUP */
7901 .renew = 1, /* append RENEW */
7902 };
7903 struct nfs4_fs_locations_res res = {
7904 .fs_locations = locations,
7905 .migration = 1,
7906 .renew = 1,
7907 };
7908 struct rpc_message msg = {
7909 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
7910 .rpc_argp = &args,
7911 .rpc_resp = &res,
7912 .rpc_cred = cred,
7913 };
7914 unsigned long now = jiffies;
7915 int status;
7916
7917 nfs_fattr_init(&locations->fattr);
7918 locations->server = server;
7919 locations->nlocations = 0;
7920
fba83f34 7921 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1);
b03d735b
CL		 7922 status = nfs4_call_sync_sequence(clnt, server, &msg,
7923 &args.seq_args, &res.seq_res);
7924 if (status)
7925 return status;
7926
7927 renew_lease(server, now);
7928 return 0;
7929}
7930
7931#ifdef CONFIG_NFS_V4_1
7932
7933/*
7934 * This operation also signals the server that this client is
7935 * performing migration recovery. The server can stop asserting
7936 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
7937 * performing this operation is identified in the SEQUENCE
7938 * operation in this compound.
7939 *
7940 * When the client supports GETATTR(fs_locations_info), it can
7941 * be plumbed in here.
7942 */
7943static int _nfs41_proc_get_locations(struct inode *inode,
7944 struct nfs4_fs_locations *locations,
a52458b4 7945 struct page *page, const struct cred *cred)
b03d735b
CL		 7946{
7947 struct nfs_server *server = NFS_SERVER(inode);
7948 struct rpc_clnt *clnt = server->client;
7949 u32 bitmask[2] = {
7950 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
7951 };
7952 struct nfs4_fs_locations_arg args = {
7953 .fh = NFS_FH(inode),
7954 .page = page,
7955 .bitmask = bitmask,
7956 .migration = 1, /* skip LOOKUP */
7957 };
7958 struct nfs4_fs_locations_res res = {
7959 .fs_locations = locations,
7960 .migration = 1,
7961 };
7962 struct rpc_message msg = {
7963 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
7964 .rpc_argp = &args,
7965 .rpc_resp = &res,
7966 .rpc_cred = cred,
7967 };
7968 int status;
7969
7970 nfs_fattr_init(&locations->fattr);
7971 locations->server = server;
7972 locations->nlocations = 0;
7973
fba83f34 7974 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1);
b03d735b
CL		 7975 status = nfs4_call_sync_sequence(clnt, server, &msg,
7976 &args.seq_args, &res.seq_res);
7977 if (status == NFS4_OK &&
7978 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
7979 status = -NFS4ERR_LEASE_MOVED;
7980 return status;
7981}
7982
7983#endif /* CONFIG_NFS_V4_1 */
7984
7985/**
7986 * nfs4_proc_get_locations - discover locations for a migrated FSID
7987 * @inode: inode on FSID that is migrating
7988 * @locations: result of query
7989 * @page: buffer
7990 * @cred: credential to use for this operation
7991 *
7992 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
7993 * operation failed, or a negative errno if a local error occurred.
7994 *
7995 * On success, "locations" is filled in, but if the server has
7996 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
7997 * asserted.
7998 *
7999 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
8000 * from this client that require migration recovery.
8001 */
8002int nfs4_proc_get_locations(struct inode *inode,
8003 struct nfs4_fs_locations *locations,
a52458b4 8004 struct page *page, const struct cred *cred)
b03d735b
CL		 8005{
8006 struct nfs_server *server = NFS_SERVER(inode);
8007 struct nfs_client *clp = server->nfs_client;
8008 const struct nfs4_mig_recovery_ops *ops =
8009 clp->cl_mvops->mig_recovery_ops;
0688e64b
TM		 8010 struct nfs4_exception exception = {
8011 .interruptible = true,
8012 };
b03d735b
CL		 8013 int status;
8014
8015 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
8016 (unsigned long long)server->fsid.major,
8017 (unsigned long long)server->fsid.minor,
8018 clp->cl_hostname);
8019 nfs_display_fhandle(NFS_FH(inode), __func__);
8020
8021 do {
8022 status = ops->get_locations(inode, locations, page, cred);
8023 if (status != -NFS4ERR_DELAY)
8024 break;
8025 nfs4_handle_exception(server, status, &exception);
8026 } while (exception.retry);
8027 return status;
8028}
8029
44c99933
CL		 8030/*
8031 * This operation also signals the server that this client is
8032 * performing "lease moved" recovery. The server can stop
8033 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
8034 * is appended to this compound to identify the client ID which is
8035 * performing recovery.
8036 */
a52458b4 8037static int _nfs40_proc_fsid_present(struct inode *inode, const struct cred *cred)
44c99933
CL		 8038{
8039 struct nfs_server *server = NFS_SERVER(inode);
8040 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
8041 struct rpc_clnt *clnt = server->client;
8042 struct nfs4_fsid_present_arg args = {
8043 .fh = NFS_FH(inode),
8044 .clientid = clp->cl_clientid,
8045 .renew = 1, /* append RENEW */
8046 };
8047 struct nfs4_fsid_present_res res = {
8048 .renew = 1,
8049 };
8050 struct rpc_message msg = {
8051 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
8052 .rpc_argp = &args,
8053 .rpc_resp = &res,
8054 .rpc_cred = cred,
8055 };
8056 unsigned long now = jiffies;
8057 int status;
8058
8059 res.fh = nfs_alloc_fhandle();
8060 if (res.fh == NULL)
8061 return -ENOMEM;
8062
fba83f34 8063 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1);
44c99933
CL		 8064 status = nfs4_call_sync_sequence(clnt, server, &msg,
8065 &args.seq_args, &res.seq_res);
8066 nfs_free_fhandle(res.fh);
8067 if (status)
8068 return status;
8069
8070 do_renew_lease(clp, now);
8071 return 0;
8072}
8073
8074#ifdef CONFIG_NFS_V4_1
8075
8076/*
8077 * This operation also signals the server that this client is
8078 * performing "lease moved" recovery. The server can stop asserting
8079 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
8080 * this operation is identified in the SEQUENCE operation in this
8081 * compound.
8082 */
a52458b4 8083static int _nfs41_proc_fsid_present(struct inode *inode, const struct cred *cred)
44c99933
CL		 8084{
8085 struct nfs_server *server = NFS_SERVER(inode);
8086 struct rpc_clnt *clnt = server->client;
8087 struct nfs4_fsid_present_arg args = {
8088 .fh = NFS_FH(inode),
8089 };
8090 struct nfs4_fsid_present_res res = {
8091 };
8092 struct rpc_message msg = {
8093 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
8094 .rpc_argp = &args,
8095 .rpc_resp = &res,
8096 .rpc_cred = cred,
8097 };
8098 int status;
8099
8100 res.fh = nfs_alloc_fhandle();
8101 if (res.fh == NULL)
8102 return -ENOMEM;
8103
fba83f34 8104 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1);
44c99933
CL		 8105 status = nfs4_call_sync_sequence(clnt, server, &msg,
8106 &args.seq_args, &res.seq_res);
8107 nfs_free_fhandle(res.fh);
8108 if (status == NFS4_OK &&
8109 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
8110 status = -NFS4ERR_LEASE_MOVED;
8111 return status;
8112}
8113
8114#endif /* CONFIG_NFS_V4_1 */
8115
8116/**
8117 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
8118 * @inode: inode on FSID to check
8119 * @cred: credential to use for this operation
8120 *
8121 * Server indicates whether the FSID is present, moved, or not
8122 * recognized. This operation is necessary to clear a LEASE_MOVED
8123 * condition for this client ID.
8124 *
8125 * Returns NFS4_OK if the FSID is present on this server,
8126 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
8127 * NFS4ERR code if some error occurred on the server, or a
8128 * negative errno if a local failure occurred.
8129 */
a52458b4 8130int nfs4_proc_fsid_present(struct inode *inode, const struct cred *cred)
44c99933
CL		 8131{
8132 struct nfs_server *server = NFS_SERVER(inode);
8133 struct nfs_client *clp = server->nfs_client;
8134 const struct nfs4_mig_recovery_ops *ops =
8135 clp->cl_mvops->mig_recovery_ops;
0688e64b
TM		 8136 struct nfs4_exception exception = {
8137 .interruptible = true,
8138 };
44c99933
CL		 8139 int status;
8140
8141 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
8142 (unsigned long long)server->fsid.major,
8143 (unsigned long long)server->fsid.minor,
8144 clp->cl_hostname);
8145 nfs_display_fhandle(NFS_FH(inode), __func__);
8146
8147 do {
8148 status = ops->fsid_present(inode, cred);
8149 if (status != -NFS4ERR_DELAY)
8150 break;
8151 nfs4_handle_exception(server, status, &exception);
8152 } while (exception.retry);
8153 return status;
8154}
8155
302fad7b 8156/*
a5250def
WAA		 8157 * If 'use_integrity' is true and the state managment nfs_client
8158 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
8159 * and the machine credential as per RFC3530bis and RFC5661 Security
8160 * Considerations sections. Otherwise, just use the user cred with the
8161 * filesystem's rpc_client.
5ec16a85 8162 */
a5250def 8163static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
5a5ea0d4
BS		 8164{
8165 int status;
50493364
AS		 8166 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
8167 struct nfs_client *clp = NFS_SERVER(dir)->nfs_client;
5a5ea0d4
BS		 8168 struct nfs4_secinfo_arg args = {
8169 .dir_fh = NFS_FH(dir),
8170 .name = name,
8171 };
8172 struct nfs4_secinfo_res res = {
8173 .flavors = flavors,
8174 };
8175 struct rpc_message msg = {
8176 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
8177 .rpc_argp = &args,
8178 .rpc_resp = &res,
8179 };
50493364
AS		 8180 struct nfs4_call_sync_data data = {
8181 .seq_server = NFS_SERVER(dir),
8182 .seq_args = &args.seq_args,
8183 .seq_res = &res.seq_res,
8184 };
8185 struct rpc_task_setup task_setup = {
8186 .rpc_client = clnt,
8187 .rpc_message = &msg,
8188 .callback_ops = clp->cl_mvops->call_sync_ops,
8189 .callback_data = &data,
8190 .flags = RPC_TASK_NO_ROUND_ROBIN,
8191 };
a52458b4 8192 const struct cred *cred = NULL;
a5250def
WAA		 8193
8194 if (use_integrity) {
50493364
AS		 8195 clnt = clp->cl_rpcclient;
8196 task_setup.rpc_client = clnt;
8197
8198 cred = nfs4_get_clid_cred(clp);
7cb852df 8199 msg.rpc_cred = cred;
a5250def 8200 }
5a5ea0d4
BS		 8201
8202 dprintk("NFS call secinfo %s\n", name->name);
8b5bee2e 8203
50493364
AS		 8204 nfs4_state_protect(clp, NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
8205 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0);
8206 status = nfs4_call_sync_custom(&task_setup);
8b5bee2e 8207
5a5ea0d4 8208 dprintk("NFS reply secinfo: %d\n", status);
a5250def 8209
a52458b4 8210 put_cred(cred);
5a5ea0d4
BS		 8211 return status;
8212}
8213
72de53ec
BS		 8214int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
8215 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4 8216{
0688e64b
TM		 8217 struct nfs4_exception exception = {
8218 .interruptible = true,
8219 };
5a5ea0d4
BS		 8220 int err;
8221 do {
a5250def
WAA		 8222 err = -NFS4ERR_WRONGSEC;
8223
8224 /* try to use integrity protection with machine cred */
8225 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
8226 err = _nfs4_proc_secinfo(dir, name, flavors, true);
8227
8228 /*
8229 * if unable to use integrity protection, or SECINFO with
8230 * integrity protection returns NFS4ERR_WRONGSEC (which is
8231 * disallowed by spec, but exists in deployed servers) use
8232 * the current filesystem's rpc_client and the user cred.
8233 */
8234 if (err == -NFS4ERR_WRONGSEC)
8235 err = _nfs4_proc_secinfo(dir, name, flavors, false);
8236
078ea3df
TM		 8237 trace_nfs4_secinfo(dir, name, err);
8238 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5a5ea0d4
BS		 8239 &exception);
8240 } while (exception.retry);
8241 return err;
8242}
8243
557134a3 8244#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 8245/*
8246 * Check the exchange flags returned by the server for invalid flags, having
8247 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
8248 * DS flags set.
8249 */
8c39076c 8250static int nfs4_check_cl_exchange_flags(u32 flags, u32 version)
357f54d6 8251{
8c39076c
OK		 8252 if (version >= 2 && (flags & ~EXCHGID4_2_FLAG_MASK_R))
8253 goto out_inval;
8254 else if (version < 2 && (flags & ~EXCHGID4_FLAG_MASK_R))
357f54d6
AA		 8255 goto out_inval;
8256 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
8257 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
8258 goto out_inval;
8259 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
8260 goto out_inval;
8261 return NFS_OK;
8262out_inval:
8263 return -NFS4ERR_INVAL;
8264}
8265
78fe0f41 8266static bool
79d4e1f0
CL		 8267nfs41_same_server_scope(struct nfs41_server_scope *a,
8268 struct nfs41_server_scope *b)
78fe0f41 8269{
49ad0145
AS		 8270 if (a->server_scope_sz != b->server_scope_sz)
8271 return false;
8272 return memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0;
78fe0f41
WAA		 8273}
8274
02a95dee
AA		 8275static void
8276nfs4_bind_one_conn_to_session_done(struct rpc_task *task, void *calldata)
8277{
5c441544 8278 struct nfs41_bind_conn_to_session_args *args = task->tk_msg.rpc_argp;
dff58530 8279 struct nfs41_bind_conn_to_session_res *res = task->tk_msg.rpc_resp;
5c441544
TM		 8280 struct nfs_client *clp = args->client;
8281
8282 switch (task->tk_status) {
8283 case -NFS4ERR_BADSESSION:
8284 case -NFS4ERR_DEADSESSION:
8285 nfs4_schedule_session_recovery(clp->cl_session,
8286 task->tk_status);
8287 }
dff58530
OK		 8288 if (args->dir == NFS4_CDFC4_FORE_OR_BOTH &&
8289 res->dir != NFS4_CDFS4_BOTH) {
8290 rpc_task_close_connection(task);
8291 if (args->retries++ < MAX_BIND_CONN_TO_SESSION_RETRIES)
8292 rpc_restart_call(task);
8293 }
02a95dee
AA		 8294}
8295
8296static const struct rpc_call_ops nfs4_bind_one_conn_to_session_ops = {
1c709b76 8297 .rpc_call_done = nfs4_bind_one_conn_to_session_done,
02a95dee
AA		 8298};
8299
7c44f1ae 8300/*
d9ddbf5d 8301 * nfs4_proc_bind_one_conn_to_session()
7c44f1ae
WAA		 8302 *
8303 * The 4.1 client currently uses the same TCP connection for the
8304 * fore and backchannel.
8305 */
d9ddbf5d
TM		 8306static
8307int nfs4_proc_bind_one_conn_to_session(struct rpc_clnt *clnt,
8308 struct rpc_xprt *xprt,
8309 struct nfs_client *clp,
a52458b4 8310 const struct cred *cred)
7c44f1ae
WAA		 8311{
8312 int status;
71a097c6
TM		 8313 struct nfs41_bind_conn_to_session_args args = {
8314 .client = clp,
8315 .dir = NFS4_CDFC4_FORE_OR_BOTH,
dff58530 8316 .retries = 0,
71a097c6 8317 };
7c44f1ae
WAA		 8318 struct nfs41_bind_conn_to_session_res res;
8319 struct rpc_message msg = {
8320 .rpc_proc =
8321 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
71a097c6 8322 .rpc_argp = &args,
7c44f1ae 8323 .rpc_resp = &res,
2cf047c9 8324 .rpc_cred = cred,
7c44f1ae 8325 };
d9ddbf5d
TM		 8326 struct rpc_task_setup task_setup_data = {
8327 .rpc_client = clnt,
8328 .rpc_xprt = xprt,
02a95dee 8329 .callback_ops = &nfs4_bind_one_conn_to_session_ops,
d9ddbf5d
TM		 8330 .rpc_message = &msg,
8331 .flags = RPC_TASK_TIMEOUT,
8332 };
8333 struct rpc_task *task;
7c44f1ae 8334
71a097c6
TM		 8335 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id);
8336 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN))
8337 args.dir = NFS4_CDFC4_FORE;
7c44f1ae 8338
d9ddbf5d
TM		 8339 /* Do not set the backchannel flag unless this is clnt->cl_xprt */
8340 if (xprt != rcu_access_pointer(clnt->cl_xprt))
8341 args.dir = NFS4_CDFC4_FORE;
8342
8343 task = rpc_run_task(&task_setup_data);
8344 if (!IS_ERR(task)) {
8345 status = task->tk_status;
8346 rpc_put_task(task);
8347 } else
8348 status = PTR_ERR(task);
c6d01c6f 8349 trace_nfs4_bind_conn_to_session(clp, status);
7c44f1ae 8350 if (status == 0) {
71a097c6 8351 if (memcmp(res.sessionid.data,
7c44f1ae
WAA		 8352 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
8353 dprintk("NFS: %s: Session ID mismatch\n", __func__);
c7ae7639 8354 return -EIO;
7c44f1ae 8355 }
71a097c6 8356 if ((res.dir & args.dir) != res.dir || res.dir == 0) {
7c44f1ae
WAA		 8357 dprintk("NFS: %s: Unexpected direction from server\n",
8358 __func__);
c7ae7639 8359 return -EIO;
7c44f1ae 8360 }
71a097c6 8361 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) {
7c44f1ae
WAA		 8362 dprintk("NFS: %s: Server returned RDMA mode = true\n",
8363 __func__);
c7ae7639 8364 return -EIO;
7c44f1ae
WAA		 8365 }
8366 }
c7ae7639 8367
7c44f1ae
WAA		 8368 return status;
8369}
8370
d9ddbf5d
TM		 8371struct rpc_bind_conn_calldata {
8372 struct nfs_client *clp;
a52458b4 8373 const struct cred *cred;
d9ddbf5d
TM		 8374};
8375
8376static int
8377nfs4_proc_bind_conn_to_session_callback(struct rpc_clnt *clnt,
8378 struct rpc_xprt *xprt,
8379 void *calldata)
8380{
8381 struct rpc_bind_conn_calldata *p = calldata;
8382
8383 return nfs4_proc_bind_one_conn_to_session(clnt, xprt, p->clp, p->cred);
8384}
8385
a52458b4 8386int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, const struct cred *cred)
d9ddbf5d
TM		 8387{
8388 struct rpc_bind_conn_calldata data = {
8389 .clp = clp,
8390 .cred = cred,
8391 };
8392 return rpc_clnt_iterate_for_each_xprt(clp->cl_rpcclient,
8393 nfs4_proc_bind_conn_to_session_callback, &data);
8394}
8395
99fe60d0 8396/*
fa940720
WAA		 8397 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
8398 * and operations we'd like to see to enable certain features in the allow map
2031cd1a
WAA		 8399 */
8400static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
8401 .how = SP4_MACH_CRED,
8402 .enforce.u.words = {
8403 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
8404 1 << (OP_EXCHANGE_ID - 32) |
8405 1 << (OP_CREATE_SESSION - 32) |
8406 1 << (OP_DESTROY_SESSION - 32) |
8407 1 << (OP_DESTROY_CLIENTID - 32)
fa940720
WAA		 8408 },
8409 .allow.u.words = {
8410 [0] = 1 << (OP_CLOSE) |
99ade3c7 8411 1 << (OP_OPEN_DOWNGRADE) |
a0279625 8412 1 << (OP_LOCKU) |
99ade3c7 8413 1 << (OP_DELEGRETURN) |
a0279625 8414 1 << (OP_COMMIT),
8b5bee2e 8415 [1] = 1 << (OP_SECINFO - 32) |
3787d506 8416 1 << (OP_SECINFO_NO_NAME - 32) |
99ade3c7 8417 1 << (OP_LAYOUTRETURN - 32) |
3787d506 8418 1 << (OP_TEST_STATEID - 32) |
a0279625
WAA		 8419 1 << (OP_FREE_STATEID - 32) |
8420 1 << (OP_WRITE - 32)
2031cd1a
WAA		 8421 }
8422};
8423
8424/*
8425 * Select the state protection mode for client `clp' given the server results
8426 * from exchange_id in `sp'.
99fe60d0 8427 *
2031cd1a
WAA		 8428 * Returns 0 on success, negative errno otherwise.
8429 */
8430static int nfs4_sp4_select_mode(struct nfs_client *clp,
8431 struct nfs41_state_protection *sp)
8432{
8433 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
8434 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
8435 1 << (OP_EXCHANGE_ID - 32) |
8436 1 << (OP_CREATE_SESSION - 32) |
8437 1 << (OP_DESTROY_SESSION - 32) |
8438 1 << (OP_DESTROY_CLIENTID - 32)
8439 };
937e3133 8440 unsigned long flags = 0;
2031cd1a 8441 unsigned int i;
937e3133 8442 int ret = 0;
2031cd1a
WAA		 8443
8444 if (sp->how == SP4_MACH_CRED) {
8445 /* Print state protect result */
8446 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
8447 for (i = 0; i <= LAST_NFS4_OP; i++) {
8448 if (test_bit(i, sp->enforce.u.longs))
8449 dfprintk(MOUNT, " enforce op %d\n", i);
8450 if (test_bit(i, sp->allow.u.longs))
8451 dfprintk(MOUNT, " allow op %d\n", i);
8452 }
8453
8454 /* make sure nothing is on enforce list that isn't supported */
8455 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
8456 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
8457 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
937e3133
TM		 8458 ret = -EINVAL;
8459 goto out;
2031cd1a
WAA		 8460 }
8461 }
8462
8463 /*
8464 * Minimal mode - state operations are allowed to use machine
8465 * credential. Note this already happens by default, so the
8466 * client doesn't have to do anything more than the negotiation.
8467 *
8468 * NOTE: we don't care if EXCHANGE_ID is in the list -
8469 * we're already using the machine cred for exchange_id
8470 * and will never use a different cred.
8471 */
8472 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
8473 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
8474 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
8475 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
8476 dfprintk(MOUNT, "sp4_mach_cred:\n");
8477 dfprintk(MOUNT, " minimal mode enabled\n");
937e3133 8478 __set_bit(NFS_SP4_MACH_CRED_MINIMAL, &flags);
2031cd1a
WAA		 8479 } else {
8480 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
937e3133
TM		 8481 ret = -EINVAL;
8482 goto out;
2031cd1a 8483 }
fa940720
WAA		 8484
8485 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
99ade3c7
AE		 8486 test_bit(OP_OPEN_DOWNGRADE, sp->allow.u.longs) &&
8487 test_bit(OP_DELEGRETURN, sp->allow.u.longs) &&
fa940720
WAA		 8488 test_bit(OP_LOCKU, sp->allow.u.longs)) {
8489 dfprintk(MOUNT, " cleanup mode enabled\n");
937e3133 8490 __set_bit(NFS_SP4_MACH_CRED_CLEANUP, &flags);
fa940720 8491 }
8b5bee2e 8492
99ade3c7
AE		 8493 if (test_bit(OP_LAYOUTRETURN, sp->allow.u.longs)) {
8494 dfprintk(MOUNT, " pnfs cleanup mode enabled\n");
937e3133 8495 __set_bit(NFS_SP4_MACH_CRED_PNFS_CLEANUP, &flags);
99ade3c7
AE		 8496 }
8497
8b5bee2e
WAA		 8498 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
8499 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
8500 dfprintk(MOUNT, " secinfo mode enabled\n");
937e3133 8501 __set_bit(NFS_SP4_MACH_CRED_SECINFO, &flags);
8b5bee2e 8502 }
3787d506
WAA		 8503
8504 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
8505 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
8506 dfprintk(MOUNT, " stateid mode enabled\n");
937e3133 8507 __set_bit(NFS_SP4_MACH_CRED_STATEID, &flags);
3787d506 8508 }
8c21c62c
WAA		 8509
8510 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
8511 dfprintk(MOUNT, " write mode enabled\n");
937e3133 8512 __set_bit(NFS_SP4_MACH_CRED_WRITE, &flags);
8c21c62c
WAA		 8513 }
8514
8515 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
8516 dfprintk(MOUNT, " commit mode enabled\n");
937e3133 8517 __set_bit(NFS_SP4_MACH_CRED_COMMIT, &flags);
8c21c62c 8518 }
2031cd1a 8519 }
937e3133
TM		 8520out:
8521 clp->cl_sp4_flags = flags;
72bf75cf 8522 return ret;
2031cd1a
WAA		 8523}
8524
8d89bd70
AA		 8525struct nfs41_exchange_id_data {
8526 struct nfs41_exchange_id_res res;
8527 struct nfs41_exchange_id_args args;
8d89bd70
AA		 8528};
8529
8d89bd70
AA		 8530static void nfs4_exchange_id_release(void *data)
8531{
8532 struct nfs41_exchange_id_data *cdata =
8533 (struct nfs41_exchange_id_data *)data;
8534
63513232 8535 nfs_put_client(cdata->args.client);
8d89bd70
AA		 8536 kfree(cdata->res.impl_id);
8537 kfree(cdata->res.server_scope);
8538 kfree(cdata->res.server_owner);
8539 kfree(cdata);
8540}
8541
8542static const struct rpc_call_ops nfs4_exchange_id_call_ops = {
8d89bd70
AA		 8543 .rpc_release = nfs4_exchange_id_release,
8544};
8545
2031cd1a
WAA		 8546/*
8547 * _nfs4_proc_exchange_id()
6bbb4ae8 8548 *
2031cd1a 8549 * Wrapper for EXCHANGE_ID operation.
99fe60d0 8550 */
9c760d1f 8551static struct rpc_task *
a52458b4 8552nfs4_run_exchange_id(struct nfs_client *clp, const struct cred *cred,
ad0849a7 8553 u32 sp4_how, struct rpc_xprt *xprt)
99fe60d0 8554{
99fe60d0
BH		 8555 struct rpc_message msg = {
8556 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
99fe60d0
BH		 8557 .rpc_cred = cred,
8558 };
8d89bd70
AA		 8559 struct rpc_task_setup task_setup_data = {
8560 .rpc_client = clp->cl_rpcclient,
8561 .callback_ops = &nfs4_exchange_id_call_ops,
8562 .rpc_message = &msg,
5a0c257f 8563 .flags = RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN,
8d89bd70
AA		 8564 };
8565 struct nfs41_exchange_id_data *calldata;
e917f0d1 8566 int status;
8d89bd70 8567
212bf41d 8568 if (!refcount_inc_not_zero(&clp->cl_count))
9c760d1f 8569 return ERR_PTR(-EIO);
8d89bd70 8570
9c760d1f 8571 status = -ENOMEM;
8d89bd70 8572 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
9c760d1f
TM		 8573 if (!calldata)
8574 goto out;
99fe60d0 8575
fd40559c 8576 nfs4_init_boot_verifier(clp, &calldata->args.verifier);
873e3851
JL		 8577
8578 status = nfs4_init_uniform_client_string(clp);
8579 if (status)
8d89bd70 8580 goto out_calldata;
3a6bb738 8581
8d89bd70
AA		 8582 calldata->res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
8583 GFP_NOFS);
8584 status = -ENOMEM;
8585 if (unlikely(calldata->res.server_owner == NULL))
8586 goto out_calldata;
78fe0f41 8587
8d89bd70 8588 calldata->res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 8589 GFP_NOFS);
8d89bd70 8590 if (unlikely(calldata->res.server_scope == NULL))
acdeb69d 8591 goto out_server_owner;
78fe0f41 8592
8d89bd70
AA		 8593 calldata->res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
8594 if (unlikely(calldata->res.impl_id == NULL))
7d2ed9ac 8595 goto out_server_scope;
7d2ed9ac 8596
2031cd1a
WAA		 8597 switch (sp4_how) {
8598 case SP4_NONE:
8d89bd70 8599 calldata->args.state_protect.how = SP4_NONE;
2031cd1a
WAA		 8600 break;
8601
8602 case SP4_MACH_CRED:
8d89bd70 8603 calldata->args.state_protect = nfs4_sp4_mach_cred_request;
2031cd1a
WAA		 8604 break;
8605
8606 default:
8607 /* unsupported! */
8608 WARN_ON_ONCE(1);
8609 status = -EINVAL;
6b55970b 8610 goto out_impl_id;
2031cd1a 8611 }
ad0849a7 8612 if (xprt) {
ad0849a7 8613 task_setup_data.rpc_xprt = xprt;
d9cb7330 8614 task_setup_data.flags |= RPC_TASK_SOFTCONN;
fd40559c
TM		 8615 memcpy(calldata->args.verifier.data, clp->cl_confirm.data,
8616 sizeof(calldata->args.verifier.data));
ad0849a7 8617 }
8d89bd70 8618 calldata->args.client = clp;
8d89bd70 8619 calldata->args.flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
bfab2817
TM		 8620 EXCHGID4_FLAG_BIND_PRINC_STATEID;
8621#ifdef CONFIG_NFS_V4_1_MIGRATION
8622 calldata->args.flags |= EXCHGID4_FLAG_SUPP_MOVED_MIGR;
8d89bd70
AA		 8623#endif
8624 msg.rpc_argp = &calldata->args;
8625 msg.rpc_resp = &calldata->res;
8626 task_setup_data.callback_data = calldata;
2031cd1a 8627
9c760d1f 8628 return rpc_run_task(&task_setup_data);
8d89bd70
AA		 8629
8630out_impl_id:
8631 kfree(calldata->res.impl_id);
8632out_server_scope:
8633 kfree(calldata->res.server_scope);
8634out_server_owner:
8635 kfree(calldata->res.server_owner);
8636out_calldata:
8637 kfree(calldata);
9c760d1f 8638out:
63513232 8639 nfs_put_client(clp);
9c760d1f
TM		 8640 return ERR_PTR(status);
8641}
8642
8643/*
8644 * _nfs4_proc_exchange_id()
8645 *
8646 * Wrapper for EXCHANGE_ID operation.
8647 */
a52458b4 8648static int _nfs4_proc_exchange_id(struct nfs_client *clp, const struct cred *cred,
9c760d1f
TM		 8649 u32 sp4_how)
8650{
8651 struct rpc_task *task;
8652 struct nfs41_exchange_id_args *argp;
8653 struct nfs41_exchange_id_res *resp;
7dc2993a 8654 unsigned long now = jiffies;
9c760d1f
TM		 8655 int status;
8656
8657 task = nfs4_run_exchange_id(clp, cred, sp4_how, NULL);
8658 if (IS_ERR(task))
8659 return PTR_ERR(task);
8660
8661 argp = task->tk_msg.rpc_argp;
8662 resp = task->tk_msg.rpc_resp;
8663 status = task->tk_status;
8664 if (status != 0)
8665 goto out;
8666
8c39076c
OK		 8667 status = nfs4_check_cl_exchange_flags(resp->flags,
8668 clp->cl_mvops->minor_version);
9c760d1f
TM		 8669 if (status != 0)
8670 goto out;
8671
8672 status = nfs4_sp4_select_mode(clp, &resp->state_protect);
8673 if (status != 0)
8674 goto out;
8675
7dc2993a
RM		 8676 do_renew_lease(clp, now);
8677
9c760d1f
TM		 8678 clp->cl_clientid = resp->clientid;
8679 clp->cl_exchange_flags = resp->flags;
8680 clp->cl_seqid = resp->seqid;
8681 /* Client ID is not confirmed */
8682 if (!(resp->flags & EXCHGID4_FLAG_CONFIRMED_R))
8683 clear_bit(NFS4_SESSION_ESTABLISHED,
8684 &clp->cl_session->session_state);
8685
8686 if (clp->cl_serverscope != NULL &&
8687 !nfs41_same_server_scope(clp->cl_serverscope,
8688 resp->server_scope)) {
8689 dprintk("%s: server_scope mismatch detected\n",
8690 __func__);
8691 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
8692 }
8693
8694 swap(clp->cl_serverowner, resp->server_owner);
8695 swap(clp->cl_serverscope, resp->server_scope);
8696 swap(clp->cl_implid, resp->impl_id);
8697
8698 /* Save the EXCHANGE_ID verifier session trunk tests */
8699 memcpy(clp->cl_confirm.data, argp->verifier.data,
8700 sizeof(clp->cl_confirm.data));
8701out:
8702 trace_nfs4_exchange_id(clp, status);
8703 rpc_put_task(task);
8704 return status;
99fe60d0
BH		 8705}
8706
2031cd1a
WAA		 8707/*
8708 * nfs4_proc_exchange_id()
8709 *
8710 * Returns zero, a negative errno, or a negative NFS4ERR status code.
8711 *
8712 * Since the clientid has expired, all compounds using sessions
8713 * associated with the stale clientid will be returning
8714 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
8715 * be in some phase of session reset.
8716 *
8717 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
8718 */
a52458b4 8719int nfs4_proc_exchange_id(struct nfs_client *clp, const struct cred *cred)
2031cd1a
WAA		 8720{
8721 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
8722 int status;
8723
8724 /* try SP4_MACH_CRED if krb5i/p */
8725 if (authflavor == RPC_AUTH_GSS_KRB5I ||
8726 authflavor == RPC_AUTH_GSS_KRB5P) {
9c760d1f 8727 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
2031cd1a
WAA		 8728 if (!status)
8729 return 0;
8730 }
8731
8732 /* try SP4_NONE */
9c760d1f 8733 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
2031cd1a
WAA		 8734}
8735
04fa2c6b
AA		 8736/**
8737 * nfs4_test_session_trunk
8738 *
8739 * This is an add_xprt_test() test function called from
8740 * rpc_clnt_setup_test_and_add_xprt.
8741 *
8742 * The rpc_xprt_switch is referrenced by rpc_clnt_setup_test_and_add_xprt
8743 * and is dereferrenced in nfs4_exchange_id_release
8744 *
8745 * Upon success, add the new transport to the rpc_clnt
8746 *
8747 * @clnt: struct rpc_clnt to get new transport
8748 * @xprt: the rpc_xprt to test
8749 * @data: call data for _nfs4_proc_exchange_id.
8750 */
10e037d1 8751void nfs4_test_session_trunk(struct rpc_clnt *clnt, struct rpc_xprt *xprt,
04fa2c6b
AA		 8752 void *data)
8753{
8754 struct nfs4_add_xprt_data *adata = (struct nfs4_add_xprt_data *)data;
9c760d1f
TM		 8755 struct rpc_task *task;
8756 int status;
8757
04fa2c6b
AA		 8758 u32 sp4_how;
8759
8760 dprintk("--> %s try %s\n", __func__,
8761 xprt->address_strings[RPC_DISPLAY_ADDR]);
8762
8763 sp4_how = (adata->clp->cl_sp4_flags == 0 ? SP4_NONE : SP4_MACH_CRED);
8764
8765 /* Test connection for session trunking. Async exchange_id call */
9c760d1f
TM		 8766 task = nfs4_run_exchange_id(adata->clp, adata->cred, sp4_how, xprt);
8767 if (IS_ERR(task))
10e037d1 8768 return;
9c760d1f
TM		 8769
8770 status = task->tk_status;
8771 if (status == 0)
8772 status = nfs4_detect_session_trunking(adata->clp,
8773 task->tk_msg.rpc_resp, xprt);
8774
10e037d1
S		 8775 if (status == 0)
8776 rpc_clnt_xprt_switch_add_xprt(clnt, xprt);
8777
9c760d1f 8778 rpc_put_task(task);
2031cd1a 8779}
04fa2c6b 8780EXPORT_SYMBOL_GPL(nfs4_test_session_trunk);
2031cd1a 8781
66245539 8782static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
a52458b4 8783 const struct cred *cred)
66245539
TM		 8784{
8785 struct rpc_message msg = {
8786 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
8787 .rpc_argp = clp,
8788 .rpc_cred = cred,
8789 };
8790 int status;
8791
5a0c257f
N		 8792 status = rpc_call_sync(clp->cl_rpcclient, &msg,
8793 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN);
c6d01c6f 8794 trace_nfs4_destroy_clientid(clp, status);
66245539 8795 if (status)
02c67525 8796 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 8797 "DESTROY_CLIENTID.", status, clp->cl_hostname);
8798 return status;
8799}
8800
8801static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
a52458b4 8802 const struct cred *cred)
66245539
TM		 8803{
8804 unsigned int loop;
8805 int ret;
8806
8807 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
8808 ret = _nfs4_proc_destroy_clientid(clp, cred);
8809 switch (ret) {
8810 case -NFS4ERR_DELAY:
8811 case -NFS4ERR_CLIENTID_BUSY:
8812 ssleep(1);
8813 break;
8814 default:
8815 return ret;
8816 }
8817 }
8818 return 0;
8819}
8820
8821int nfs4_destroy_clientid(struct nfs_client *clp)
8822{
a52458b4 8823 const struct cred *cred;
66245539
TM		 8824 int ret = 0;
8825
8826 if (clp->cl_mvops->minor_version < 1)
8827 goto out;
8828 if (clp->cl_exchange_flags == 0)
8829 goto out;
05f4c350
CL		 8830 if (clp->cl_preserve_clid)
8831 goto out;
73d8bde5 8832 cred = nfs4_get_clid_cred(clp);
66245539 8833 ret = nfs4_proc_destroy_clientid(clp, cred);
a52458b4 8834 put_cred(cred);
66245539
TM		 8835 switch (ret) {
8836 case 0:
8837 case -NFS4ERR_STALE_CLIENTID:
8838 clp->cl_exchange_flags = 0;
8839 }
8840out:
8841 return ret;
8842}
8843
0efb01b2
DB		 8844#endif /* CONFIG_NFS_V4_1 */
8845
2050f0cc
AA		 8846struct nfs4_get_lease_time_data {
8847 struct nfs4_get_lease_time_args *args;
8848 struct nfs4_get_lease_time_res *res;
8849 struct nfs_client *clp;
8850};
8851
8852static void nfs4_get_lease_time_prepare(struct rpc_task *task,
8853 void *calldata)
8854{
2050f0cc
AA		 8855 struct nfs4_get_lease_time_data *data =
8856 (struct nfs4_get_lease_time_data *)calldata;
8857
8858 dprintk("--> %s\n", __func__);
8859 /* just setup sequence, do not trigger session recovery
8860 since we're invoked within one */
7981c8a6 8861 nfs4_setup_sequence(data->clp,
d9afbd1b
TM		 8862 &data->args->la_seq_args,
8863 &data->res->lr_seq_res,
8864 task);
2050f0cc
AA		 8865 dprintk("<-- %s\n", __func__);
8866}
8867
8868/*
8869 * Called from nfs4_state_manager thread for session setup, so don't recover
8870 * from sequence operation or clientid errors.
8871 */
8872static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
8873{
8874 struct nfs4_get_lease_time_data *data =
8875 (struct nfs4_get_lease_time_data *)calldata;
8876
8877 dprintk("--> %s\n", __func__);
0efb01b2 8878 if (!nfs4_sequence_done(task, &data->res->lr_seq_res))
14516c3a 8879 return;
2050f0cc
AA		 8880 switch (task->tk_status) {
8881 case -NFS4ERR_DELAY:
8882 case -NFS4ERR_GRACE:
8883 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
8884 rpc_delay(task, NFS4_POLL_RETRY_MIN);
8885 task->tk_status = 0;
df561f66 8886 fallthrough;
a8a4ae3a 8887 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 8888 rpc_restart_call_prepare(task);
2050f0cc
AA		 8889 return;
8890 }
2050f0cc
AA		 8891 dprintk("<-- %s\n", __func__);
8892}
8893
17280175 8894static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 8895 .rpc_call_prepare = nfs4_get_lease_time_prepare,
8896 .rpc_call_done = nfs4_get_lease_time_done,
8897};
8898
8899int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
8900{
2050f0cc
AA		 8901 struct nfs4_get_lease_time_args args;
8902 struct nfs4_get_lease_time_res res = {
8903 .lr_fsinfo = fsinfo,
8904 };
8905 struct nfs4_get_lease_time_data data = {
8906 .args = &args,
8907 .res = &res,
8908 .clp = clp,
8909 };
8910 struct rpc_message msg = {
8911 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
8912 .rpc_argp = &args,
8913 .rpc_resp = &res,
8914 };
8915 struct rpc_task_setup task_setup = {
8916 .rpc_client = clp->cl_rpcclient,
8917 .rpc_message = &msg,
8918 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 8919 .callback_data = &data,
8920 .flags = RPC_TASK_TIMEOUT,
2050f0cc 8921 };
2050f0cc 8922
fba83f34 8923 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0, 1);
f836b27e 8924 return nfs4_call_sync_custom(&task_setup);
2050f0cc
AA		 8925}
8926
0efb01b2
DB		 8927#ifdef CONFIG_NFS_V4_1
8928
fc931582
AA		 8929/*
8930 * Initialize the values to be used by the client in CREATE_SESSION
8931 * If nfs4_init_session set the fore channel request and response sizes,
8932 * use them.
8933 *
8934 * Set the back channel max_resp_sz_cached to zero to force the client to
8935 * always set csa_cachethis to FALSE because the current implementation
8936 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
8937 */
6b26cc8c
CL		 8938static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args,
8939 struct rpc_clnt *clnt)
fc931582 8940{
18aad3d5 8941 unsigned int max_rqst_sz, max_resp_sz;
6b26cc8c 8942 unsigned int max_bc_payload = rpc_max_bc_payload(clnt);
7402a4fe 8943 unsigned int max_bc_slots = rpc_num_bc_slots(clnt);
18aad3d5
AA		 8944
8945 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
8946 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 8947
fc931582 8948 /* Fore channel attributes */
18aad3d5
AA		 8949 args->fc_attrs.max_rqst_sz = max_rqst_sz;
8950 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 8951 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 8952 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 8953
8954 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 8955 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 8956 __func__,
8957 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 8958 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 8959
8960 /* Back channel attributes */
6b26cc8c
CL		 8961 args->bc_attrs.max_rqst_sz = max_bc_payload;
8962 args->bc_attrs.max_resp_sz = max_bc_payload;
fc931582
AA		 8963 args->bc_attrs.max_resp_sz_cached = 0;
8964 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
62421cd9 8965 args->bc_attrs.max_reqs = max_t(unsigned short, max_session_cb_slots, 1);
7402a4fe
TM		 8966 if (args->bc_attrs.max_reqs > max_bc_slots)
8967 args->bc_attrs.max_reqs = max_bc_slots;
fc931582
AA		 8968
8969 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
8970 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
8971 __func__,
8972 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
8973 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
8974 args->bc_attrs.max_reqs);
8975}
8976
79969dd1
TM		 8977static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args,
8978 struct nfs41_create_session_res *res)
8d35301d 8979{
43c2e885 8980 struct nfs4_channel_attrs *sent = &args->fc_attrs;
79969dd1 8981 struct nfs4_channel_attrs *rcvd = &res->fc_attrs;
43c2e885 8982
43c2e885
BF		 8983 if (rcvd->max_resp_sz > sent->max_resp_sz)
8984 return -EINVAL;
8985 /*
8986 * Our requested max_ops is the minimum we need; we're not
8987 * prepared to break up compounds into smaller pieces than that.
8988 * So, no point even trying to continue if the server won't
8989 * cooperate:
8990 */
8991 if (rcvd->max_ops < sent->max_ops)
8992 return -EINVAL;
8993 if (rcvd->max_reqs == 0)
8994 return -EINVAL;
b4b9a0c1
VG		 8995 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
8996 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 8997 return 0;
8d35301d
AA		 8998}
8999
79969dd1
TM		 9000static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args,
9001 struct nfs41_create_session_res *res)
43c2e885
BF		 9002{
9003 struct nfs4_channel_attrs *sent = &args->bc_attrs;
79969dd1 9004 struct nfs4_channel_attrs *rcvd = &res->bc_attrs;
8d35301d 9005
b1c0df5f
TM		 9006 if (!(res->flags & SESSION4_BACK_CHAN))
9007 goto out;
43c2e885
BF		 9008 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
9009 return -EINVAL;
9010 if (rcvd->max_resp_sz < sent->max_resp_sz)
9011 return -EINVAL;
9012 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
9013 return -EINVAL;
5405fc44 9014 if (rcvd->max_ops > sent->max_ops)
43c2e885 9015 return -EINVAL;
5405fc44 9016 if (rcvd->max_reqs > sent->max_reqs)
43c2e885 9017 return -EINVAL;
b1c0df5f 9018out:
43c2e885
BF		 9019 return 0;
9020}
8d35301d 9021
8d35301d 9022static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
79969dd1 9023 struct nfs41_create_session_res *res)
8d35301d 9024{
43c2e885 9025 int ret;
8d35301d 9026
79969dd1 9027 ret = nfs4_verify_fore_channel_attrs(args, res);
43c2e885
BF		 9028 if (ret)
9029 return ret;
79969dd1
TM		 9030 return nfs4_verify_back_channel_attrs(args, res);
9031}
9032
9033static void nfs4_update_session(struct nfs4_session *session,
9034 struct nfs41_create_session_res *res)
9035{
9036 nfs4_copy_sessionid(&session->sess_id, &res->sessionid);
e11259f9
TM		 9037 /* Mark client id and session as being confirmed */
9038 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;
9039 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state);
79969dd1
TM		 9040 session->flags = res->flags;
9041 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs));
b1c0df5f
TM		 9042 if (res->flags & SESSION4_BACK_CHAN)
9043 memcpy(&session->bc_attrs, &res->bc_attrs,
9044 sizeof(session->bc_attrs));
8d35301d
AA		 9045}
9046
848f5bda 9047static int _nfs4_proc_create_session(struct nfs_client *clp,
a52458b4 9048 const struct cred *cred)
fc931582
AA		 9049{
9050 struct nfs4_session *session = clp->cl_session;
9051 struct nfs41_create_session_args args = {
9052 .client = clp,
79969dd1
TM		 9053 .clientid = clp->cl_clientid,
9054 .seqid = clp->cl_seqid,
fc931582
AA		 9055 .cb_program = NFS4_CALLBACK,
9056 };
79969dd1
TM		 9057 struct nfs41_create_session_res res;
9058
fc931582
AA		 9059 struct rpc_message msg = {
9060 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
9061 .rpc_argp = &args,
9062 .rpc_resp = &res,
848f5bda 9063 .rpc_cred = cred,
fc931582
AA		 9064 };
9065 int status;
9066
6b26cc8c 9067 nfs4_init_channel_attrs(&args, clp->cl_rpcclient);
0f91421e 9068 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 9069
5a0c257f
N		 9070 status = rpc_call_sync(session->clp->cl_rpcclient, &msg,
9071 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN);
c6d01c6f 9072 trace_nfs4_create_session(clp, status);
fc931582 9073
b519d408
TM		 9074 switch (status) {
9075 case -NFS4ERR_STALE_CLIENTID:
9076 case -NFS4ERR_DELAY:
9077 case -ETIMEDOUT:
9078 case -EACCES:
9079 case -EAGAIN:
9080 goto out;
8b98a532 9081 }
b519d408
TM		 9082
9083 clp->cl_seqid++;
43095d39 9084 if (!status) {
8d35301d 9085 /* Verify the session's negotiated channel_attrs values */
79969dd1 9086 status = nfs4_verify_channel_attrs(&args, &res);
fc931582 9087 /* Increment the clientid slot sequence id */
79969dd1
TM		 9088 if (status)
9089 goto out;
9090 nfs4_update_session(session, &res);
fc931582 9091 }
79969dd1 9092out:
fc931582
AA		 9093 return status;
9094}
9095
9096/*
9097 * Issues a CREATE_SESSION operation to the server.
9098 * It is the responsibility of the caller to verify the session is
9099 * expired before calling this routine.
9100 */
a52458b4 9101int nfs4_proc_create_session(struct nfs_client *clp, const struct cred *cred)
fc931582
AA		 9102{
9103 int status;
9104 unsigned *ptr;
fc931582
AA		 9105 struct nfs4_session *session = clp->cl_session;
9106
9107 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
9108
848f5bda 9109 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 9110 if (status)
9111 goto out;
9112
aacd5537
AA		 9113 /* Init or reset the session slot tables */
9114 status = nfs4_setup_session_slot_tables(session);
9115 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 9116 if (status)
9117 goto out;
9118
9119 ptr = (unsigned *)&session->sess_id.data[0];
9120 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
9121 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 9122out:
9123 dprintk("<-- %s\n", __func__);
9124 return status;
9125}
9126
0f3e66c6
AA		 9127/*
9128 * Issue the over-the-wire RPC DESTROY_SESSION.
9129 * The caller must serialize access to this routine.
9130 */
848f5bda 9131int nfs4_proc_destroy_session(struct nfs4_session *session,
a52458b4 9132 const struct cred *cred)
0f3e66c6 9133{
848f5bda
TM		 9134 struct rpc_message msg = {
9135 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
9136 .rpc_argp = session,
9137 .rpc_cred = cred,
9138 };
0f3e66c6 9139 int status = 0;
0f3e66c6
AA		 9140
9141 dprintk("--> nfs4_proc_destroy_session\n");
9142
9143 /* session is still being setup */
e11259f9
TM		 9144 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state))
9145 return 0;
0f3e66c6 9146
5a0c257f
N		 9147 status = rpc_call_sync(session->clp->cl_rpcclient, &msg,
9148 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN);
c6d01c6f 9149 trace_nfs4_destroy_session(session->clp, status);
0f3e66c6
AA		 9150
9151 if (status)
08106ac7 9152 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 9153 "Session has been destroyed regardless...\n", status);
9154
9155 dprintk("<-- nfs4_proc_destroy_session\n");
9156 return status;
9157}
9158
fc01cea9
AA		 9159/*
9160 * Renew the cl_session lease.
9161 */
d5f8d3fe
TM		 9162struct nfs4_sequence_data {
9163 struct nfs_client *clp;
9164 struct nfs4_sequence_args args;
9165 struct nfs4_sequence_res res;
9166};
9167
dc96aef9
AB		 9168static void nfs41_sequence_release(void *data)
9169{
d5f8d3fe
TM		 9170 struct nfs4_sequence_data *calldata = data;
9171 struct nfs_client *clp = calldata->clp;
dc96aef9 9172
212bf41d 9173 if (refcount_read(&clp->cl_count) > 1)
7135840f
AB		 9174 nfs4_schedule_state_renewal(clp);
9175 nfs_put_client(clp);
d5f8d3fe 9176 kfree(calldata);
dc96aef9
AB		 9177}
9178
aa5190d0
TM		 9179static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
9180{
9181 switch(task->tk_status) {
9182 case -NFS4ERR_DELAY:
aa5190d0
TM		 9183 rpc_delay(task, NFS4_POLL_RETRY_MAX);
9184 return -EAGAIN;
9185 default:
0400a6b0 9186 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 9187 }
9188 return 0;
9189}
9190
dc96aef9 9191static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 9192{
d5f8d3fe
TM		 9193 struct nfs4_sequence_data *calldata = data;
9194 struct nfs_client *clp = calldata->clp;
fc01cea9 9195
14516c3a
TM		 9196 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
9197 return;
fc01cea9 9198
c6d01c6f 9199 trace_nfs4_sequence(clp, task->tk_status);
fc01cea9
AA		 9200 if (task->tk_status < 0) {
9201 dprintk("%s ERROR %d\n", __func__, task->tk_status);
212bf41d 9202 if (refcount_read(&clp->cl_count) == 1)
7135840f 9203 goto out;
fc01cea9 9204
aa5190d0
TM		 9205 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
9206 rpc_restart_call_prepare(task);
fc01cea9
AA		 9207 return;
9208 }
9209 }
fc01cea9 9210 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 9211out:
fc01cea9
AA		 9212 dprintk("<-- %s\n", __func__);
9213}
9214
9215static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
9216{
d5f8d3fe
TM		 9217 struct nfs4_sequence_data *calldata = data;
9218 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 9219 struct nfs4_sequence_args *args;
9220 struct nfs4_sequence_res *res;
9221
fc01cea9
AA		 9222 args = task->tk_msg.rpc_argp;
9223 res = task->tk_msg.rpc_resp;
9224
7981c8a6 9225 nfs4_setup_sequence(clp, args, res, task);
fc01cea9
AA		 9226}
9227
9228static const struct rpc_call_ops nfs41_sequence_ops = {
9229 .rpc_call_done = nfs41_sequence_call_done,
9230 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 9231 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 9232};
9233
8fe72bac 9234static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
a52458b4 9235 const struct cred *cred,
3be0f80b 9236 struct nfs4_slot *slot,
8fe72bac 9237 bool is_privileged)
fc01cea9 9238{
d5f8d3fe 9239 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 9240 struct rpc_message msg = {
9241 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
9242 .rpc_cred = cred,
9243 };
71ac6da9
TM		 9244 struct rpc_task_setup task_setup_data = {
9245 .rpc_client = clp->cl_rpcclient,
9246 .rpc_message = &msg,
8fe72bac 9247 .callback_ops = &nfs41_sequence_ops,
85e39fee 9248 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT | RPC_TASK_MOVEABLE,
71ac6da9 9249 };
3be0f80b 9250 struct rpc_task *ret;
fc01cea9 9251
3be0f80b 9252 ret = ERR_PTR(-EIO);
212bf41d 9253 if (!refcount_inc_not_zero(&clp->cl_count))
3be0f80b
TM		 9254 goto out_err;
9255
9256 ret = ERR_PTR(-ENOMEM);
dfb4f309 9257 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
3be0f80b
TM		 9258 if (calldata == NULL)
9259 goto out_put_clp;
fba83f34 9260 nfs4_init_sequence(&calldata->args, &calldata->res, 0, is_privileged);
3be0f80b 9261 nfs4_sequence_attach_slot(&calldata->args, &calldata->res, slot);
d5f8d3fe
TM		 9262 msg.rpc_argp = &calldata->args;
9263 msg.rpc_resp = &calldata->res;
9264 calldata->clp = clp;
71ac6da9 9265 task_setup_data.callback_data = calldata;
fc01cea9 9266
3be0f80b
TM		 9267 ret = rpc_run_task(&task_setup_data);
9268 if (IS_ERR(ret))
9269 goto out_err;
9270 return ret;
9271out_put_clp:
9272 nfs_put_client(clp);
9273out_err:
9274 nfs41_release_slot(slot);
9275 return ret;
71ac6da9
TM		 9276}
9277
a52458b4 9278static int nfs41_proc_async_sequence(struct nfs_client *clp, const struct cred *cred, unsigned renew_flags)
71ac6da9
TM		 9279{
9280 struct rpc_task *task;
9281 int ret = 0;
9282
2f60ea6b 9283 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
d1f456b0 9284 return -EAGAIN;
3be0f80b 9285 task = _nfs41_proc_sequence(clp, cred, NULL, false);
71ac6da9
TM		 9286 if (IS_ERR(task))
9287 ret = PTR_ERR(task);
9288 else
bf294b41 9289 rpc_put_task_async(task);
71ac6da9
TM		 9290 dprintk("<-- %s status=%d\n", __func__, ret);
9291 return ret;
9292}
9293
a52458b4 9294static int nfs4_proc_sequence(struct nfs_client *clp, const struct cred *cred)
71ac6da9
TM		 9295{
9296 struct rpc_task *task;
9297 int ret;
9298
3be0f80b 9299 task = _nfs41_proc_sequence(clp, cred, NULL, true);
71ac6da9
TM		 9300 if (IS_ERR(task)) {
9301 ret = PTR_ERR(task);
9302 goto out;
9303 }
9304 ret = rpc_wait_for_completion_task(task);
be824167 9305 if (!ret)
71ac6da9
TM		 9306 ret = task->tk_status;
9307 rpc_put_task(task);
9308out:
9309 dprintk("<-- %s status=%d\n", __func__, ret);
9310 return ret;
fc01cea9
AA		 9311}
9312
fce5c838
RL		 9313struct nfs4_reclaim_complete_data {
9314 struct nfs_client *clp;
9315 struct nfs41_reclaim_complete_args arg;
9316 struct nfs41_reclaim_complete_res res;
9317};
9318
9319static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
9320{
9321 struct nfs4_reclaim_complete_data *calldata = data;
9322
7981c8a6 9323 nfs4_setup_sequence(calldata->clp,
d9afbd1b
TM		 9324 &calldata->arg.seq_args,
9325 &calldata->res.seq_res,
9326 task);
fce5c838
RL		 9327}
9328
aa5190d0
TM		 9329static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
9330{
9331 switch(task->tk_status) {
9332 case 0:
57174593 9333 wake_up_all(&clp->cl_lock_waitq);
df561f66 9334 fallthrough;
aa5190d0
TM		 9335 case -NFS4ERR_COMPLETE_ALREADY:
9336 case -NFS4ERR_WRONG_CRED: /* What to do here? */
9337 break;
9338 case -NFS4ERR_DELAY:
aa5190d0 9339 rpc_delay(task, NFS4_POLL_RETRY_MAX);
df561f66 9340 fallthrough;
a8a4ae3a 9341 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0 9342 return -EAGAIN;
0048fdd0
TM		 9343 case -NFS4ERR_BADSESSION:
9344 case -NFS4ERR_DEADSESSION:
9345 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
0048fdd0 9346 break;
aa5190d0 9347 default:
0400a6b0 9348 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 9349 }
9350 return 0;
9351}
9352
fce5c838
RL		 9353static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
9354{
9355 struct nfs4_reclaim_complete_data *calldata = data;
9356 struct nfs_client *clp = calldata->clp;
9357 struct nfs4_sequence_res *res = &calldata->res.seq_res;
9358
9359 dprintk("--> %s\n", __func__);
14516c3a
TM		 9360 if (!nfs41_sequence_done(task, res))
9361 return;
fce5c838 9362
c6d01c6f 9363 trace_nfs4_reclaim_complete(clp, task->tk_status);
aa5190d0
TM		 9364 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
9365 rpc_restart_call_prepare(task);
9366 return;
9367 }
fce5c838
RL		 9368 dprintk("<-- %s\n", __func__);
9369}
9370
9371static void nfs4_free_reclaim_complete_data(void *data)
9372{
9373 struct nfs4_reclaim_complete_data *calldata = data;
9374
9375 kfree(calldata);
9376}
9377
9378static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
9379 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
9380 .rpc_call_done = nfs4_reclaim_complete_done,
9381 .rpc_release = nfs4_free_reclaim_complete_data,
9382};
9383
9384/*
9385 * Issue a global reclaim complete.
9386 */
965e9c23 9387static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
a52458b4 9388 const struct cred *cred)
fce5c838
RL		 9389{
9390 struct nfs4_reclaim_complete_data *calldata;
fce5c838
RL		 9391 struct rpc_message msg = {
9392 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 9393 .rpc_cred = cred,
fce5c838
RL		 9394 };
9395 struct rpc_task_setup task_setup_data = {
9396 .rpc_client = clp->cl_rpcclient,
9397 .rpc_message = &msg,
9398 .callback_ops = &nfs4_reclaim_complete_call_ops,
4c952e3d 9399 .flags = RPC_TASK_NO_ROUND_ROBIN,
fce5c838
RL		 9400 };
9401 int status = -ENOMEM;
9402
9403 dprintk("--> %s\n", __func__);
8535b2be 9404 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 9405 if (calldata == NULL)
9406 goto out;
9407 calldata->clp = clp;
9408 calldata->arg.one_fs = 0;
fce5c838 9409
fba83f34 9410 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0, 1);
fce5c838
RL		 9411 msg.rpc_argp = &calldata->arg;
9412 msg.rpc_resp = &calldata->res;
9413 task_setup_data.callback_data = calldata;
4c952e3d 9414 status = nfs4_call_sync_custom(&task_setup_data);
fce5c838
RL		 9415out:
9416 dprintk("<-- %s status=%d\n", __func__, status);
9417 return status;
9418}
b1f69b75
AA		 9419
9420static void
9421nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
9422{
9423 struct nfs4_layoutget *lgp = calldata;
c31663d4 9424 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
b1f69b75
AA		 9425
9426 dprintk("--> %s\n", __func__);
7981c8a6 9427 nfs4_setup_sequence(server->nfs_client, &lgp->args.seq_args,
183d9e7b
JL		 9428 &lgp->res.seq_res, task);
9429 dprintk("<-- %s\n", __func__);
b1f69b75
AA		 9430}
9431
9432static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
9433{
9434 struct nfs4_layoutget *lgp = calldata;
183d9e7b
JL		 9435
9436 dprintk("--> %s\n", __func__);
2e80dbe7 9437 nfs41_sequence_process(task, &lgp->res.seq_res);
183d9e7b
JL		 9438 dprintk("<-- %s\n", __func__);
9439}
9440
9441static int
9442nfs4_layoutget_handle_exception(struct rpc_task *task,
9443 struct nfs4_layoutget *lgp, struct nfs4_exception *exception)
9444{
ee314c2a
TM		 9445 struct inode *inode = lgp->args.inode;
9446 struct nfs_server *server = NFS_SERVER(inode);
b4e89bcb 9447 struct pnfs_layout_hdr *lo = lgp->lo;
e85d7ee4
TM		 9448 int nfs4err = task->tk_status;
9449 int err, status = 0;
f7db0b28 9450 LIST_HEAD(head);
b1f69b75 9451
ed7e5423 9452 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
b1f69b75 9453
2dbf8dff
TM		 9454 nfs4_sequence_free_slot(&lgp->res.seq_res);
9455
e85d7ee4 9456 switch (nfs4err) {
b1f69b75 9457 case 0:
ee314c2a 9458 goto out;
7c1e6e58
PT		 9459
9460 /*
9461 * NFS4ERR_LAYOUTUNAVAILABLE means we are not supposed to use pnfs
9462 * on the file. set tk_status to -ENODATA to tell upper layer to
9463 * retry go inband.
9464 */
9465 case -NFS4ERR_LAYOUTUNAVAILABLE:
183d9e7b 9466 status = -ENODATA;
7c1e6e58 9467 goto out;
21b874c8
TM		 9468 /*
9469 * NFS4ERR_BADLAYOUT means the MDS cannot return a layout of
9470 * length lgp->args.minlength != 0 (see RFC5661 section 18.43.3).
9471 */
9472 case -NFS4ERR_BADLAYOUT:
183d9e7b
JL		 9473 status = -EOVERFLOW;
9474 goto out;
ed7e5423
BH		 9475 /*
9476 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
21b874c8
TM		 9477 * (or clients) writing to the same RAID stripe except when
9478 * the minlength argument is 0 (see RFC5661 section 18.43.3).
183d9e7b
JL		 9479 *
9480 * Treat it like we would RECALLCONFLICT -- we retry for a little
9481 * while, and then eventually give up.
ed7e5423 9482 */
b1f69b75 9483 case -NFS4ERR_LAYOUTTRYLATER:
183d9e7b
JL		 9484 if (lgp->args.minlength == 0) {
9485 status = -EOVERFLOW;
9486 goto out;
ed7e5423 9487 }
e85d7ee4
TM		 9488 status = -EBUSY;
9489 break;
183d9e7b 9490 case -NFS4ERR_RECALLCONFLICT:
183d9e7b 9491 status = -ERECALLCONFLICT;
e85d7ee4 9492 break;
26f47443
TM		 9493 case -NFS4ERR_DELEG_REVOKED:
9494 case -NFS4ERR_ADMIN_REVOKED:
ee314c2a
TM		 9495 case -NFS4ERR_EXPIRED:
9496 case -NFS4ERR_BAD_STATEID:
183d9e7b 9497 exception->timeout = 0;
ee314c2a 9498 spin_lock(&inode->i_lock);
f7db0b28
TM		 9499 /* If the open stateid was bad, then recover it. */
9500 if (!lo || test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) ||
e8fa33a6 9501 !nfs4_stateid_match_other(&lgp->args.stateid, &lo->plh_stateid)) {
ee314c2a 9502 spin_unlock(&inode->i_lock);
183d9e7b 9503 exception->state = lgp->args.ctx->state;
26f47443 9504 exception->stateid = &lgp->args.stateid;
2259f960
TM		 9505 break;
9506 }
f7db0b28
TM		 9507
9508 /*
9509 * Mark the bad layout state as invalid, then retry
9510 */
668f455d 9511 pnfs_mark_layout_stateid_invalid(lo, &head);
f7db0b28 9512 spin_unlock(&inode->i_lock);
1f18b82c 9513 nfs_commit_inode(inode, 0);
f7db0b28
TM		 9514 pnfs_free_lseg_list(&head);
9515 status = -EAGAIN;
9516 goto out;
b1f69b75 9517 }
183d9e7b 9518
e85d7ee4
TM		 9519 err = nfs4_handle_exception(server, nfs4err, exception);
9520 if (!status) {
9521 if (exception->retry)
9522 status = -EAGAIN;
9523 else
9524 status = err;
9525 }
ee314c2a 9526out:
b1f69b75 9527 dprintk("<-- %s\n", __func__);
183d9e7b 9528 return status;
b1f69b75
AA		 9529}
9530
dacb452d 9531size_t max_response_pages(struct nfs_server *server)
8554116e
IK		 9532{
9533 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
9534 return nfs_page_array_len(0, max_resp_sz);
9535}
9536
b1f69b75
AA		 9537static void nfs4_layoutget_release(void *calldata)
9538{
9539 struct nfs4_layoutget *lgp = calldata;
9540
9541 dprintk("--> %s\n", __func__);
bd171930 9542 nfs4_sequence_free_slot(&lgp->res.seq_res);
29a8bfe5 9543 pnfs_layoutget_free(lgp);
b1f69b75
AA		 9544 dprintk("<-- %s\n", __func__);
9545}
9546
9547static const struct rpc_call_ops nfs4_layoutget_call_ops = {
9548 .rpc_call_prepare = nfs4_layoutget_prepare,
9549 .rpc_call_done = nfs4_layoutget_done,
9550 .rpc_release = nfs4_layoutget_release,
9551};
9552
a0b0a6e3 9553struct pnfs_layout_segment *
dacb452d 9554nfs4_proc_layoutget(struct nfs4_layoutget *lgp, long *timeout)
b1f69b75 9555{
a47970ff
WAA		 9556 struct inode *inode = lgp->args.inode;
9557 struct nfs_server *server = NFS_SERVER(inode);
b1f69b75
AA		 9558 struct rpc_task *task;
9559 struct rpc_message msg = {
9560 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
9561 .rpc_argp = &lgp->args,
9562 .rpc_resp = &lgp->res,
6ab59344 9563 .rpc_cred = lgp->cred,
b1f69b75
AA		 9564 };
9565 struct rpc_task_setup task_setup_data = {
9566 .rpc_client = server->client,
9567 .rpc_message = &msg,
9568 .callback_ops = &nfs4_layoutget_call_ops,
9569 .callback_data = lgp,
85e39fee
OK		 9570 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF |
9571 RPC_TASK_MOVEABLE,
b1f69b75 9572 };
a0b0a6e3 9573 struct pnfs_layout_segment *lseg = NULL;
bc23676c
TM		 9574 struct nfs4_exception exception = {
9575 .inode = inode,
9576 .timeout = *timeout,
9577 };
b1f69b75
AA		 9578 int status = 0;
9579
9580 dprintk("--> %s\n", __func__);
9581
fba83f34 9582 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0, 0);
a47970ff 9583
b1f69b75 9584 task = rpc_run_task(&task_setup_data);
6e47666e 9585
820bf85c 9586 status = rpc_wait_for_completion_task(task);
2dbf8dff
TM		 9587 if (status != 0)
9588 goto out;
9589
18c0778a 9590 if (task->tk_status < 0) {
183d9e7b
JL		 9591 status = nfs4_layoutget_handle_exception(task, lgp, &exception);
9592 *timeout = exception.timeout;
18c0778a
TM		 9593 } else if (lgp->res.layoutp->len == 0) {
9594 status = -EAGAIN;
9595 *timeout = nfs4_update_delay(&exception.timeout);
2dbf8dff
TM		 9596 } else
9597 lseg = pnfs_layout_process(lgp);
9598out:
1037e6ea
TM		 9599 trace_nfs4_layoutget(lgp->args.ctx,
9600 &lgp->args.range,
9601 &lgp->res.range,
48c9579a 9602 &lgp->res.stateid,
1037e6ea 9603 status);
183d9e7b 9604
b1f69b75
AA		 9605 rpc_put_task(task);
9606 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 9607 if (status)
9608 return ERR_PTR(status);
9609 return lseg;
b1f69b75
AA		 9610}
9611
cbe82603
BH		 9612static void
9613nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
9614{
9615 struct nfs4_layoutreturn *lrp = calldata;
9616
9617 dprintk("--> %s\n", __func__);
7981c8a6 9618 nfs4_setup_sequence(lrp->clp,
d9afbd1b
TM		 9619 &lrp->args.seq_args,
9620 &lrp->res.seq_res,
9621 task);
c8bf7073
TM		 9622 if (!pnfs_layout_is_valid(lrp->args.layout))
9623 rpc_exit(task, 0);
cbe82603
BH		 9624}
9625
9626static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
9627{
9628 struct nfs4_layoutreturn *lrp = calldata;
9629 struct nfs_server *server;
9630
9631 dprintk("--> %s\n", __func__);
9632
2e80dbe7 9633 if (!nfs41_sequence_process(task, &lrp->res.seq_res))
cbe82603
BH		 9634 return;
9635
6109bcf7
TM		 9636 /*
9637 * Was there an RPC level error? Assume the call succeeded,
9638 * and that we need to release the layout
9639 */
9640 if (task->tk_rpc_status != 0 && RPC_WAS_SENT(task)) {
9641 lrp->res.lrs_present = 0;
9642 return;
9643 }
9644
cbe82603 9645 server = NFS_SERVER(lrp->args.inode);
f22e5edd 9646 switch (task->tk_status) {
ff90514e 9647 case -NFS4ERR_OLD_STATEID:
30cb3ee2 9648 if (nfs4_layout_refresh_old_stateid(&lrp->args.stateid,
ecf84026 9649 &lrp->args.range,
ff90514e
TM		 9650 lrp->args.inode))
9651 goto out_restart;
df561f66 9652 fallthrough;
f22e5edd
TM		 9653 default:
9654 task->tk_status = 0;
df561f66 9655 fallthrough;
f22e5edd
TM		 9656 case 0:
9657 break;
9658 case -NFS4ERR_DELAY:
8478eaa1 9659 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
f22e5edd 9660 break;
ff90514e 9661 goto out_restart;
cbe82603 9662 }
cbe82603 9663 dprintk("<-- %s\n", __func__);
ff90514e
TM		 9664 return;
9665out_restart:
9666 task->tk_status = 0;
9667 nfs4_sequence_free_slot(&lrp->res.seq_res);
9668 rpc_restart_call_prepare(task);
cbe82603
BH		 9669}
9670
9671static void nfs4_layoutreturn_release(void *calldata)
9672{
9673 struct nfs4_layoutreturn *lrp = calldata;
849b286f 9674 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 9675
9676 dprintk("--> %s\n", __func__);
2a974425 9677 pnfs_layoutreturn_free_lsegs(lo, &lrp->args.stateid, &lrp->args.range,
68f74479 9678 lrp->res.lrs_present ? &lrp->res.stateid : NULL);
2e80dbe7 9679 nfs4_sequence_free_slot(&lrp->res.seq_res);
4d796d75
TM		 9680 if (lrp->ld_private.ops && lrp->ld_private.ops->free)
9681 lrp->ld_private.ops->free(&lrp->ld_private);
2f065ddb
TM		 9682 pnfs_put_layout_hdr(lrp->args.layout);
9683 nfs_iput_and_deactive(lrp->inode);
44ea8dfc 9684 put_cred(lrp->cred);
cbe82603
BH		 9685 kfree(calldata);
9686 dprintk("<-- %s\n", __func__);
9687}
9688
9689static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
9690 .rpc_call_prepare = nfs4_layoutreturn_prepare,
9691 .rpc_call_done = nfs4_layoutreturn_done,
9692 .rpc_release = nfs4_layoutreturn_release,
9693};
9694
6c16605d 9695int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync)
cbe82603
BH		 9696{
9697 struct rpc_task *task;
9698 struct rpc_message msg = {
9699 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
9700 .rpc_argp = &lrp->args,
9701 .rpc_resp = &lrp->res,
9556000d 9702 .rpc_cred = lrp->cred,
cbe82603
BH		 9703 };
9704 struct rpc_task_setup task_setup_data = {
1771c577 9705 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
cbe82603
BH		 9706 .rpc_message = &msg,
9707 .callback_ops = &nfs4_layoutreturn_call_ops,
9708 .callback_data = lrp,
85e39fee 9709 .flags = RPC_TASK_MOVEABLE,
cbe82603 9710 };
6c16605d 9711 int status = 0;
cbe82603 9712
99ade3c7
AE		 9713 nfs4_state_protect(NFS_SERVER(lrp->args.inode)->nfs_client,
9714 NFS_SP4_MACH_CRED_PNFS_CLEANUP,
9715 &task_setup_data.rpc_client, &msg);
9716
cbe82603 9717 dprintk("--> %s\n", __func__);
c3aba897 9718 lrp->inode = nfs_igrab_and_active(lrp->args.inode);
5a0ec8ac 9719 if (!sync) {
5a0ec8ac
TM		 9720 if (!lrp->inode) {
9721 nfs4_layoutreturn_release(lrp);
9722 return -EAGAIN;
9723 }
9724 task_setup_data.flags |= RPC_TASK_ASYNC;
9725 }
c3aba897
TM		 9726 if (!lrp->inode)
9727 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1,
9728 1);
9729 else
9730 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1,
9731 0);
cbe82603
BH		 9732 task = rpc_run_task(&task_setup_data);
9733 if (IS_ERR(task))
9734 return PTR_ERR(task);
5a0ec8ac
TM		 9735 if (sync)
9736 status = task->tk_status;
48c9579a 9737 trace_nfs4_layoutreturn(lrp->args.inode, &lrp->args.stateid, status);
cbe82603
BH		 9738 dprintk("<-- %s status=%d\n", __func__, status);
9739 rpc_put_task(task);
9740 return status;
9741}
9742
b1f69b75 9743static int
cd5875fe
TM		 9744_nfs4_proc_getdeviceinfo(struct nfs_server *server,
9745 struct pnfs_device *pdev,
a52458b4 9746 const struct cred *cred)
b1f69b75
AA		 9747{
9748 struct nfs4_getdeviceinfo_args args = {
9749 .pdev = pdev,
4e590803
TM		 9750 .notify_types = NOTIFY_DEVICEID4_CHANGE |
9751 NOTIFY_DEVICEID4_DELETE,
b1f69b75
AA		 9752 };
9753 struct nfs4_getdeviceinfo_res res = {
9754 .pdev = pdev,
9755 };
9756 struct rpc_message msg = {
9757 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
9758 .rpc_argp = &args,
9759 .rpc_resp = &res,
cd5875fe 9760 .rpc_cred = cred,
b1f69b75
AA		 9761 };
9762 int status;
9763
9764 dprintk("--> %s\n", __func__);
7c513058 9765 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4e590803
TM		 9766 if (res.notification & ~args.notify_types)
9767 dprintk("%s: unsupported notification\n", __func__);
df52699e
TM		 9768 if (res.notification != args.notify_types)
9769 pdev->nocache = 1;
4e590803 9770
cac1d3a2
TM		 9771 trace_nfs4_getdeviceinfo(server, &pdev->dev_id, status);
9772
b1f69b75
AA		 9773 dprintk("<-- %s status=%d\n", __func__, status);
9774
9775 return status;
9776}
9777
cd5875fe
TM		 9778int nfs4_proc_getdeviceinfo(struct nfs_server *server,
9779 struct pnfs_device *pdev,
a52458b4 9780 const struct cred *cred)
b1f69b75
AA		 9781{
9782 struct nfs4_exception exception = { };
9783 int err;
9784
9785 do {
9786 err = nfs4_handle_exception(server,
cd5875fe 9787 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 9788 &exception);
9789 } while (exception.retry);
9790 return err;
9791}
9792EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
9793
863a3c6c
AA		 9794static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
9795{
9796 struct nfs4_layoutcommit_data *data = calldata;
9797 struct nfs_server *server = NFS_SERVER(data->args.inode);
9798
7981c8a6 9799 nfs4_setup_sequence(server->nfs_client,
d9afbd1b
TM		 9800 &data->args.seq_args,
9801 &data->res.seq_res,
9802 task);
863a3c6c
AA		 9803}
9804
9805static void
9806nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
9807{
9808 struct nfs4_layoutcommit_data *data = calldata;
9809 struct nfs_server *server = NFS_SERVER(data->args.inode);
9810
6ba7db34 9811 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 9812 return;
9813
9814 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 9815 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
9816 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
9817 case -NFS4ERR_BADLAYOUT: /* no layout */
9818 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 9819 task->tk_status = 0;
ffb81717 9820 break;
e59d27e0 9821 case 0:
e59d27e0
TM		 9822 break;
9823 default:
8478eaa1 9824 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) {
e59d27e0
TM		 9825 rpc_restart_call_prepare(task);
9826 return;
9827 }
9828 }
863a3c6c
AA		 9829}
9830
9831static void nfs4_layoutcommit_release(void *calldata)
9832{
9833 struct nfs4_layoutcommit_data *data = calldata;
9834
db29c089 9835 pnfs_cleanup_layoutcommit(data);
d8c951c3
TM		 9836 nfs_post_op_update_inode_force_wcc(data->args.inode,
9837 data->res.fattr);
a52458b4 9838 put_cred(data->cred);
472e2594 9839 nfs_iput_and_deactive(data->inode);
863a3c6c
AA		 9840 kfree(data);
9841}
9842
9843static const struct rpc_call_ops nfs4_layoutcommit_ops = {
9844 .rpc_call_prepare = nfs4_layoutcommit_prepare,
9845 .rpc_call_done = nfs4_layoutcommit_done,
9846 .rpc_release = nfs4_layoutcommit_release,
9847};
9848
9849int
ef311537 9850nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 9851{
9852 struct rpc_message msg = {
9853 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
9854 .rpc_argp = &data->args,
9855 .rpc_resp = &data->res,
9856 .rpc_cred = data->cred,
9857 };
9858 struct rpc_task_setup task_setup_data = {
9859 .task = &data->task,
9860 .rpc_client = NFS_CLIENT(data->args.inode),
9861 .rpc_message = &msg,
9862 .callback_ops = &nfs4_layoutcommit_ops,
9863 .callback_data = data,
85e39fee 9864 .flags = RPC_TASK_MOVEABLE,
863a3c6c
AA		 9865 };
9866 struct rpc_task *task;
9867 int status = 0;
9868
b4839ebe
KM		 9869 dprintk("NFS: initiating layoutcommit call. sync %d "
9870 "lbw: %llu inode %lu\n", sync,
863a3c6c
AA		 9871 data->args.lastbytewritten,
9872 data->args.inode->i_ino);
9873
472e2594
TM		 9874 if (!sync) {
9875 data->inode = nfs_igrab_and_active(data->args.inode);
9876 if (data->inode == NULL) {
9877 nfs4_layoutcommit_release(data);
9878 return -EAGAIN;
9879 }
9880 task_setup_data.flags = RPC_TASK_ASYNC;
9881 }
fba83f34 9882 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 0);
863a3c6c
AA		 9883 task = rpc_run_task(&task_setup_data);
9884 if (IS_ERR(task))
9885 return PTR_ERR(task);
472e2594
TM		 9886 if (sync)
9887 status = task->tk_status;
48c9579a 9888 trace_nfs4_layoutcommit(data->args.inode, &data->args.stateid, status);
863a3c6c
AA		 9889 dprintk("%s: status %d\n", __func__, status);
9890 rpc_put_task(task);
9891 return status;
9892}
fca78d6d 9893
302fad7b 9894/*
97431204
AA		 9895 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
9896 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
9897 */
fca78d6d
BS		 9898static int
9899_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
b1b3e136
WAA		 9900 struct nfs_fsinfo *info,
9901 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
fca78d6d
BS		 9902{
9903 struct nfs41_secinfo_no_name_args args = {
9904 .style = SECINFO_STYLE_CURRENT_FH,
9905 };
9906 struct nfs4_secinfo_res res = {
9907 .flavors = flavors,
9908 };
9909 struct rpc_message msg = {
9910 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
9911 .rpc_argp = &args,
9912 .rpc_resp = &res,
9913 };
cc15e24a
AS		 9914 struct nfs4_call_sync_data data = {
9915 .seq_server = server,
9916 .seq_args = &args.seq_args,
9917 .seq_res = &res.seq_res,
9918 };
9919 struct rpc_task_setup task_setup = {
9920 .rpc_client = server->client,
9921 .rpc_message = &msg,
9922 .callback_ops = server->nfs_client->cl_mvops->call_sync_ops,
9923 .callback_data = &data,
9924 .flags = RPC_TASK_NO_ROUND_ROBIN,
9925 };
a52458b4 9926 const struct cred *cred = NULL;
b1b3e136
WAA		 9927 int status;
9928
9929 if (use_integrity) {
48bb6ec1 9930 task_setup.rpc_client = server->nfs_client->cl_rpcclient;
cc15e24a 9931
7cb852df
WAA		 9932 cred = nfs4_get_clid_cred(server->nfs_client);
9933 msg.rpc_cred = cred;
b1b3e136
WAA		 9934 }
9935
9936 dprintk("--> %s\n", __func__);
cc15e24a
AS		 9937 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0);
9938 status = nfs4_call_sync_custom(&task_setup);
b1b3e136
WAA		 9939 dprintk("<-- %s status=%d\n", __func__, status);
9940
a52458b4 9941 put_cred(cred);
b1b3e136
WAA		 9942
9943 return status;
fca78d6d
BS		 9944}
9945
9946static int
9947nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
9948 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
9949{
0688e64b
TM		 9950 struct nfs4_exception exception = {
9951 .interruptible = true,
9952 };
fca78d6d
BS		 9953 int err;
9954 do {
b1b3e136
WAA		 9955 /* first try using integrity protection */
9956 err = -NFS4ERR_WRONGSEC;
9957
9958 /* try to use integrity protection with machine cred */
9959 if (_nfs4_is_integrity_protected(server->nfs_client))
9960 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
9961 flavors, true);
9962
9963 /*
9964 * if unable to use integrity protection, or SECINFO with
9965 * integrity protection returns NFS4ERR_WRONGSEC (which is
9966 * disallowed by spec, but exists in deployed servers) use
9967 * the current filesystem's rpc_client and the user cred.
9968 */
9969 if (err == -NFS4ERR_WRONGSEC)
9970 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
9971 flavors, false);
9972
fca78d6d
BS		 9973 switch (err) {
9974 case 0:
9975 case -NFS4ERR_WRONGSEC:
78b19bae 9976 case -ENOTSUPP:
05e9cfb4 9977 goto out;
fca78d6d
BS		 9978 default:
9979 err = nfs4_handle_exception(server, err, &exception);
9980 }
9981 } while (exception.retry);
05e9cfb4 9982out:
fca78d6d
BS		 9983 return err;
9984}
9985
9986static int
9987nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
9988 struct nfs_fsinfo *info)
9989{
9990 int err;
9991 struct page *page;
367156d9 9992 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
fca78d6d 9993 struct nfs4_secinfo_flavors *flavors;
58a8cf12
WAA		 9994 struct nfs4_secinfo4 *secinfo;
9995 int i;
fca78d6d
BS		 9996
9997 page = alloc_page(GFP_KERNEL);
9998 if (!page) {
9999 err = -ENOMEM;
10000 goto out;
10001 }
10002
10003 flavors = page_address(page);
10004 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
10005
10006 /*
10007 * Fall back on "guess and check" method if
10008 * the server doesn't support SECINFO_NO_NAME
10009 */
78b19bae 10010 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
fca78d6d
BS		 10011 err = nfs4_find_root_sec(server, fhandle, info);
10012 goto out_freepage;
10013 }
10014 if (err)
10015 goto out_freepage;
10016
58a8cf12
WAA		 10017 for (i = 0; i < flavors->num_flavors; i++) {
10018 secinfo = &flavors->flavors[i];
10019
10020 switch (secinfo->flavor) {
10021 case RPC_AUTH_NULL:
10022 case RPC_AUTH_UNIX:
10023 case RPC_AUTH_GSS:
10024 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
10025 &secinfo->flavor_info);
10026 break;
10027 default:
10028 flavor = RPC_AUTH_MAXFLAVOR;
10029 break;
10030 }
10031
4d4b69dd
WAA		 10032 if (!nfs_auth_info_match(&server->auth_info, flavor))
10033 flavor = RPC_AUTH_MAXFLAVOR;
10034
58a8cf12
WAA		 10035 if (flavor != RPC_AUTH_MAXFLAVOR) {
10036 err = nfs4_lookup_root_sec(server, fhandle,
10037 info, flavor);
10038 if (!err)
10039 break;
10040 }
10041 }
10042
10043 if (flavor == RPC_AUTH_MAXFLAVOR)
10044 err = -EPERM;
fca78d6d
BS		 10045
10046out_freepage:
10047 put_page(page);
10048 if (err == -EACCES)
10049 return -EPERM;
10050out:
10051 return err;
10052}
1cab0652 10053
ab7cb0df
TM		 10054static int _nfs41_test_stateid(struct nfs_server *server,
10055 nfs4_stateid *stateid,
a52458b4 10056 const struct cred *cred)
7d974794
BS		 10057{
10058 int status;
10059 struct nfs41_test_stateid_args args = {
1cab0652 10060 .stateid = stateid,
7d974794
BS		 10061 };
10062 struct nfs41_test_stateid_res res;
10063 struct rpc_message msg = {
10064 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
10065 .rpc_argp = &args,
10066 .rpc_resp = &res,
ab7cb0df 10067 .rpc_cred = cred,
7d974794 10068 };
3787d506
WAA		 10069 struct rpc_clnt *rpc_client = server->client;
10070
10071 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
10072 &rpc_client, &msg);
1cab0652 10073
38527b15 10074 dprintk("NFS call test_stateid %p\n", stateid);
fba83f34 10075 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1);
3787d506 10076 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8fe72bac 10077 &args.seq_args, &res.seq_res);
38527b15
CL		 10078 if (status != NFS_OK) {
10079 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 10080 return status;
38527b15
CL		 10081 }
10082 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 10083 return -res.status;
7d974794
BS		 10084}
10085
43912bbb
TM		 10086static void nfs4_handle_delay_or_session_error(struct nfs_server *server,
10087 int err, struct nfs4_exception *exception)
10088{
10089 exception->retry = 0;
10090 switch(err) {
10091 case -NFS4ERR_DELAY:
76e8a1bd 10092 case -NFS4ERR_RETRY_UNCACHED_REP:
43912bbb
TM		 10093 nfs4_handle_exception(server, err, exception);
10094 break;
10095 case -NFS4ERR_BADSESSION:
10096 case -NFS4ERR_BADSLOT:
10097 case -NFS4ERR_BAD_HIGH_SLOT:
10098 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
10099 case -NFS4ERR_DEADSESSION:
10100 nfs4_do_handle_exception(server, err, exception);
10101 }
10102}
10103
38527b15
CL		 10104/**
10105 * nfs41_test_stateid - perform a TEST_STATEID operation
10106 *
10107 * @server: server / transport on which to perform the operation
10108 * @stateid: state ID to test
ab7cb0df 10109 * @cred: credential
38527b15
CL		 10110 *
10111 * Returns NFS_OK if the server recognizes that "stateid" is valid.
10112 * Otherwise a negative NFS4ERR value is returned if the operation
10113 * failed or the state ID is not currently valid.
10114 */
ab7cb0df
TM		 10115static int nfs41_test_stateid(struct nfs_server *server,
10116 nfs4_stateid *stateid,
a52458b4 10117 const struct cred *cred)
7d974794 10118{
0688e64b
TM		 10119 struct nfs4_exception exception = {
10120 .interruptible = true,
10121 };
7d974794
BS		 10122 int err;
10123 do {
ab7cb0df 10124 err = _nfs41_test_stateid(server, stateid, cred);
43912bbb 10125 nfs4_handle_delay_or_session_error(server, err, &exception);
7d974794
BS		 10126 } while (exception.retry);
10127 return err;
10128}
9aeda35f 10129
7c1d5fae
TM		 10130struct nfs_free_stateid_data {
10131 struct nfs_server *server;
10132 struct nfs41_free_stateid_args args;
9aeda35f 10133 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 10134};
10135
10136static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
10137{
10138 struct nfs_free_stateid_data *data = calldata;
7981c8a6 10139 nfs4_setup_sequence(data->server->nfs_client,
7c1d5fae
TM		 10140 &data->args.seq_args,
10141 &data->res.seq_res,
10142 task);
10143}
10144
10145static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
10146{
10147 struct nfs_free_stateid_data *data = calldata;
10148
10149 nfs41_sequence_done(task, &data->res.seq_res);
10150
10151 switch (task->tk_status) {
10152 case -NFS4ERR_DELAY:
8478eaa1 10153 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN)
7c1d5fae
TM		 10154 rpc_restart_call_prepare(task);
10155 }
10156}
10157
10158static void nfs41_free_stateid_release(void *calldata)
10159{
10160 kfree(calldata);
10161}
10162
17f26b12 10163static const struct rpc_call_ops nfs41_free_stateid_ops = {
7c1d5fae
TM		 10164 .rpc_call_prepare = nfs41_free_stateid_prepare,
10165 .rpc_call_done = nfs41_free_stateid_done,
10166 .rpc_release = nfs41_free_stateid_release,
10167};
10168
2f261020
AS		 10169/**
10170 * nfs41_free_stateid - perform a FREE_STATEID operation
10171 *
10172 * @server: server / transport on which to perform the operation
10173 * @stateid: state ID to release
10174 * @cred: credential
302fad7b 10175 * @privileged: set to true if this call needs to be privileged
2f261020
AS		 10176 *
10177 * Note: this function is always asynchronous.
10178 */
10179static int nfs41_free_stateid(struct nfs_server *server,
f0b0bf88 10180 const nfs4_stateid *stateid,
a52458b4 10181 const struct cred *cred,
7c1d5fae
TM		 10182 bool privileged)
10183{
9aeda35f
BS		 10184 struct rpc_message msg = {
10185 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 10186 .rpc_cred = cred,
9aeda35f 10187 };
7c1d5fae
TM		 10188 struct rpc_task_setup task_setup = {
10189 .rpc_client = server->client,
10190 .rpc_message = &msg,
10191 .callback_ops = &nfs41_free_stateid_ops,
85e39fee 10192 .flags = RPC_TASK_ASYNC | RPC_TASK_MOVEABLE,
7c1d5fae
TM		 10193 };
10194 struct nfs_free_stateid_data *data;
2f261020 10195 struct rpc_task *task;
9aeda35f 10196
3787d506
WAA		 10197 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
10198 &task_setup.rpc_client, &msg);
10199
38527b15 10200 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 10201 data = kmalloc(sizeof(*data), GFP_NOFS);
10202 if (!data)
2f261020 10203 return -ENOMEM;
7c1d5fae
TM		 10204 data->server = server;
10205 nfs4_stateid_copy(&data->args.stateid, stateid);
10206
10207 task_setup.callback_data = data;
10208
10209 msg.rpc_argp = &data->args;
10210 msg.rpc_resp = &data->res;
fba83f34 10211 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, privileged);
2f261020 10212 task = rpc_run_task(&task_setup);
7c1d5fae
TM		 10213 if (IS_ERR(task))
10214 return PTR_ERR(task);
7c1d5fae 10215 rpc_put_task(task);
f0b0bf88 10216 return 0;
9aeda35f 10217}
36281caa 10218
f1cdae87
JL		 10219static void
10220nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
c8b2d0bf 10221{
a52458b4 10222 const struct cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 10223
f0b0bf88 10224 nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf 10225 nfs4_free_lock_state(server, lsp);
c8b2d0bf
TM		 10226}
10227
36281caa
TM		 10228static bool nfs41_match_stateid(const nfs4_stateid *s1,
10229 const nfs4_stateid *s2)
10230{
93b717fd
TM		 10231 if (s1->type != s2->type)
10232 return false;
10233
2d2f24ad 10234 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 10235 return false;
10236
2d2f24ad 10237 if (s1->seqid == s2->seqid)
36281caa 10238 return true;
36281caa 10239
045c5519 10240 return s1->seqid == 0 || s2->seqid == 0;
36281caa
TM		 10241}
10242
557134a3
AA		 10243#endif /* CONFIG_NFS_V4_1 */
10244
36281caa
TM		 10245static bool nfs4_match_stateid(const nfs4_stateid *s1,
10246 const nfs4_stateid *s2)
10247{
f597c537 10248 return nfs4_stateid_match(s1, s2);
36281caa
TM		 10249}
10250
10251
17280175 10252static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 10253 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 10254 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 10255 .recover_open = nfs4_open_reclaim,
10256 .recover_lock = nfs4_lock_reclaim,
591d71cb 10257 .establish_clid = nfs4_init_clientid,
05f4c350 10258 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 10259};
10260
591d71cb 10261#if defined(CONFIG_NFS_V4_1)
17280175 10262static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 10263 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
10264 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
10265 .recover_open = nfs4_open_reclaim,
10266 .recover_lock = nfs4_lock_reclaim,
4d643d1d 10267 .establish_clid = nfs41_init_clientid,
fce5c838 10268 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 10269 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 10270};
10271#endif /* CONFIG_NFS_V4_1 */
10272
17280175 10273static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 10274 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
10275 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
4dfd4f7a 10276 .recover_open = nfs40_open_expired,
591d71cb
AA		 10277 .recover_lock = nfs4_lock_expired,
10278 .establish_clid = nfs4_init_clientid,
10279};
10280
10281#if defined(CONFIG_NFS_V4_1)
17280175 10282static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 10283 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 10284 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 10285 .recover_open = nfs41_open_expired,
10286 .recover_lock = nfs41_lock_expired,
4d643d1d 10287 .establish_clid = nfs41_init_clientid,
1da177e4 10288};
591d71cb 10289#endif /* CONFIG_NFS_V4_1 */
1da177e4 10290
17280175 10291static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 10292 .sched_state_renewal = nfs4_proc_async_renew,
f15e1e8b 10293 .get_state_renewal_cred = nfs4_get_renew_cred,
8e69514f 10294 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 10295};
10296
10297#if defined(CONFIG_NFS_V4_1)
17280175 10298static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 10299 .sched_state_renewal = nfs41_proc_async_sequence,
f15e1e8b 10300 .get_state_renewal_cred = nfs4_get_machine_cred,
8e69514f 10301 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 10302};
10303#endif
10304
ec011fe8 10305static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
b03d735b 10306 .get_locations = _nfs40_proc_get_locations,
44c99933 10307 .fsid_present = _nfs40_proc_fsid_present,
ec011fe8
CL		 10308};
10309
10310#if defined(CONFIG_NFS_V4_1)
10311static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
b03d735b 10312 .get_locations = _nfs41_proc_get_locations,
44c99933 10313 .fsid_present = _nfs41_proc_fsid_present,
ec011fe8
CL		 10314};
10315#endif /* CONFIG_NFS_V4_1 */
10316
97dc1359
TM		 10317static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
10318 .minor_version = 0,
39c6daae
TM		 10319 .init_caps = NFS_CAP_READDIRPLUS
10320 | NFS_CAP_ATOMIC_OPEN
39c6daae 10321 | NFS_CAP_POSIX_LOCK,
abf79bb3
CL		 10322 .init_client = nfs40_init_client,
10323 .shutdown_client = nfs40_shutdown_client,
36281caa 10324 .match_stateid = nfs4_match_stateid,
fca78d6d 10325 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 10326 .free_lock_state = nfs4_release_lockowner,
45870d69 10327 .test_and_free_expired = nfs40_test_and_free_expired_stateid,
63f5f796 10328 .alloc_seqid = nfs_alloc_seqid,
9915ea7e 10329 .call_sync_ops = &nfs40_call_sync_ops,
c48f4f35
TM		 10330 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
10331 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
10332 .state_renewal_ops = &nfs40_state_renewal_ops,
ec011fe8 10333 .mig_recovery_ops = &nfs40_mig_recovery_ops,
97dc1359
TM		 10334};
10335
10336#if defined(CONFIG_NFS_V4_1)
63f5f796
TM		 10337static struct nfs_seqid *
10338nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2)
10339{
10340 return NULL;
10341}
10342
97dc1359
TM		 10343static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
10344 .minor_version = 1,
39c6daae
TM		 10345 .init_caps = NFS_CAP_READDIRPLUS
10346 | NFS_CAP_ATOMIC_OPEN
3b66486c 10347 | NFS_CAP_POSIX_LOCK
49f9a0fa 10348 | NFS_CAP_STATEID_NFSV41
6e01260c
FI		 10349 | NFS_CAP_ATOMIC_OPEN_V1
10350 | NFS_CAP_LGOPEN,
abf79bb3
CL		 10351 .init_client = nfs41_init_client,
10352 .shutdown_client = nfs41_shutdown_client,
36281caa 10353 .match_stateid = nfs41_match_stateid,
fca78d6d 10354 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 10355 .free_lock_state = nfs41_free_lock_state,
45870d69 10356 .test_and_free_expired = nfs41_test_and_free_expired_stateid,
63f5f796 10357 .alloc_seqid = nfs_alloc_no_seqid,
04fa2c6b 10358 .session_trunk = nfs4_test_session_trunk,
9915ea7e 10359 .call_sync_ops = &nfs41_call_sync_ops,
c48f4f35
TM		 10360 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
10361 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
10362 .state_renewal_ops = &nfs41_state_renewal_ops,
ec011fe8 10363 .mig_recovery_ops = &nfs41_mig_recovery_ops,
97dc1359
TM		 10364};
10365#endif
10366
42c2c424
SD		 10367#if defined(CONFIG_NFS_V4_2)
10368static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
10369 .minor_version = 2,
7017310a
BS		 10370 .init_caps = NFS_CAP_READDIRPLUS
10371 | NFS_CAP_ATOMIC_OPEN
7017310a
BS		 10372 | NFS_CAP_POSIX_LOCK
10373 | NFS_CAP_STATEID_NFSV41
e983120e 10374 | NFS_CAP_ATOMIC_OPEN_V1
6e01260c 10375 | NFS_CAP_LGOPEN
f4ac1674 10376 | NFS_CAP_ALLOCATE
2e72448b 10377 | NFS_CAP_COPY
cb95deea 10378 | NFS_CAP_OFFLOAD_CANCEL
0491567b 10379 | NFS_CAP_COPY_NOTIFY
624bd5b7 10380 | NFS_CAP_DEALLOCATE
6c5a0d89 10381 | NFS_CAP_SEEK
e5341f3a 10382 | NFS_CAP_LAYOUTSTATS
3eb86093 10383 | NFS_CAP_CLONE
c5675526
AS		 10384 | NFS_CAP_LAYOUTERROR
10385 | NFS_CAP_READ_PLUS,
abf79bb3
CL		 10386 .init_client = nfs41_init_client,
10387 .shutdown_client = nfs41_shutdown_client,
42c2c424
SD		 10388 .match_stateid = nfs41_match_stateid,
10389 .find_root_sec = nfs41_find_root_sec,
7017310a 10390 .free_lock_state = nfs41_free_lock_state,
9915ea7e 10391 .call_sync_ops = &nfs41_call_sync_ops,
45870d69 10392 .test_and_free_expired = nfs41_test_and_free_expired_stateid,
63f5f796 10393 .alloc_seqid = nfs_alloc_no_seqid,
04fa2c6b 10394 .session_trunk = nfs4_test_session_trunk,
42c2c424
SD		 10395 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
10396 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
10397 .state_renewal_ops = &nfs41_state_renewal_ops,
18e3b739 10398 .mig_recovery_ops = &nfs41_mig_recovery_ops,
42c2c424
SD		 10399};
10400#endif
10401
97dc1359
TM		 10402const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
10403 [0] = &nfs_v4_0_minor_ops,
10404#if defined(CONFIG_NFS_V4_1)
10405 [1] = &nfs_v4_1_minor_ops,
10406#endif
42c2c424
SD		 10407#if defined(CONFIG_NFS_V4_2)
10408 [2] = &nfs_v4_2_minor_ops,
10409#endif
97dc1359
TM		 10410};
10411
13997823 10412static ssize_t nfs4_listxattr(struct dentry *dentry, char *list, size_t size)
c4803c49 10413{
012a211a 10414 ssize_t error, error2, error3;
c4803c49
AG		 10415
10416 error = generic_listxattr(dentry, list, size);
10417 if (error < 0)
10418 return error;
10419 if (list) {
10420 list += error;
10421 size -= error;
10422 }
10423
10424 error2 = nfs4_listxattr_nfs4_label(d_inode(dentry), list, size);
10425 if (error2 < 0)
10426 return error2;
012a211a
FL		 10427
10428 if (list) {
10429 list += error2;
10430 size -= error2;
10431 }
10432
10433 error3 = nfs4_listxattr_nfs4_user(d_inode(dentry), list, size);
10434 if (error3 < 0)
10435 return error3;
10436
10437 return error + error2 + error3;
c4803c49
AG		 10438}
10439
17f26b12 10440static const struct inode_operations nfs4_dir_inode_operations = {
73a79706
BS		 10441 .create = nfs_create,
10442 .lookup = nfs_lookup,
10443 .atomic_open = nfs_atomic_open,
10444 .link = nfs_link,
10445 .unlink = nfs_unlink,
10446 .symlink = nfs_symlink,
10447 .mkdir = nfs_mkdir,
10448 .rmdir = nfs_rmdir,
10449 .mknod = nfs_mknod,
10450 .rename = nfs_rename,
10451 .permission = nfs_permission,
10452 .getattr = nfs_getattr,
10453 .setattr = nfs_setattr,
c4803c49 10454 .listxattr = nfs4_listxattr,
73a79706
BS		 10455};
10456
92e1d5be 10457static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 10458 .permission = nfs_permission,
10459 .getattr = nfs_getattr,
10460 .setattr = nfs_setattr,
c4803c49 10461 .listxattr = nfs4_listxattr,
6b3b5496
BF		 10462};
10463
509de811 10464const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 10465 .version = 4, /* protocol version */
10466 .dentry_ops = &nfs4_dentry_operations,
10467 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 10468 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 10469 .file_ops = &nfs4_file_operations,
1da177e4 10470 .getroot = nfs4_proc_get_root,
281cad46 10471 .submount = nfs4_submount,
f2aedb71 10472 .try_get_tree = nfs4_try_get_tree,
1da177e4
LT		 10473 .getattr = nfs4_proc_getattr,
10474 .setattr = nfs4_proc_setattr,
10475 .lookup = nfs4_proc_lookup,
5b5faaf6 10476 .lookupp = nfs4_proc_lookupp,
1da177e4
LT		 10477 .access = nfs4_proc_access,
10478 .readlink = nfs4_proc_readlink,
1da177e4
LT		 10479 .create = nfs4_proc_create,
10480 .remove = nfs4_proc_remove,
10481 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 10482 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4 10483 .unlink_done = nfs4_proc_unlink_done,
d3d4152a 10484 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 10485 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 10486 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 10487 .link = nfs4_proc_link,
10488 .symlink = nfs4_proc_symlink,
10489 .mkdir = nfs4_proc_mkdir,
912678db 10490 .rmdir = nfs4_proc_rmdir,
1da177e4
LT		 10491 .readdir = nfs4_proc_readdir,
10492 .mknod = nfs4_proc_mknod,
10493 .statfs = nfs4_proc_statfs,
10494 .fsinfo = nfs4_proc_fsinfo,
10495 .pathconf = nfs4_proc_pathconf,
e9326dca 10496 .set_capabilities = nfs4_server_capabilities,
1da177e4 10497 .decode_dirent = nfs4_decode_dirent,
a4cdda59 10498 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
1da177e4 10499 .read_setup = nfs4_proc_read_setup,
ec06c096 10500 .read_done = nfs4_read_done,
1da177e4 10501 .write_setup = nfs4_proc_write_setup,
788e7a89 10502 .write_done = nfs4_write_done,
1da177e4 10503 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 10504 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 10505 .commit_done = nfs4_commit_done,
1da177e4 10506 .lock = nfs4_proc_lock,
e50a1c2e 10507 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 10508 .close_context = nfs4_close_context,
2b484297 10509 .open_context = nfs4_atomic_open,
011e2a7f 10510 .have_delegation = nfs4_have_delegation,
6663ee7f 10511 .alloc_client = nfs4_alloc_client,
45a52a02 10512 .init_client = nfs4_init_client,
cdb7eced 10513 .free_client = nfs4_free_client,
1179acc6
BS		 10514 .create_server = nfs4_create_server,
10515 .clone_server = nfs_clone_server,
1da177e4
LT		 10516};
10517
64c2ce8b 10518static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
98e9cb57 10519 .name = XATTR_NAME_NFSV4_ACL,
64c2ce8b
AK		 10520 .list = nfs4_xattr_list_nfs4_acl,
10521 .get = nfs4_xattr_get_nfs4_acl,
10522 .set = nfs4_xattr_set_nfs4_acl,
10523};
10524
012a211a
FL		 10525#ifdef CONFIG_NFS_V4_2
10526static const struct xattr_handler nfs4_xattr_nfs4_user_handler = {
10527 .prefix = XATTR_USER_PREFIX,
10528 .get = nfs4_xattr_get_nfs4_user,
10529 .set = nfs4_xattr_set_nfs4_user,
10530};
10531#endif
10532
64c2ce8b
AK		 10533const struct xattr_handler *nfs4_xattr_handlers[] = {
10534 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 10535#ifdef CONFIG_NFS_V4_SECURITY_LABEL
10536 &nfs4_xattr_nfs4_label_handler,
012a211a
FL		 10537#endif
10538#ifdef CONFIG_NFS_V4_2
10539 &nfs4_xattr_nfs4_user_handler,
c9bccef6 10540#endif
64c2ce8b
AK		 10541 NULL
10542};
Empty description
This page took 4.297298 seconds and 4 git commands to generate.