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Merge tag 'drm-next-2024-05-25' of https://gitlab.freedesktop.org/drm/kernel
[linux-2.6-block.git] / fs / nfs / nfs4proc.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
1da177e4
LT		 39#include <linux/delay.h>
40#include <linux/errno.h>
41#include <linux/string.h>
652f89f6
TM		 42#include <linux/ratelimit.h>
43#include <linux/printk.h>
5a0e3ad6 44#include <linux/slab.h>
1da177e4
LT		 45#include <linux/sunrpc/clnt.h>
46#include <linux/nfs.h>
47#include <linux/nfs4.h>
48#include <linux/nfs_fs.h>
49#include <linux/nfs_page.h>
9b7160c5 50#include <linux/nfs_mount.h>
1da177e4 51#include <linux/namei.h>
02a913a7 52#include <linux/mount.h>
99fe60d0 53#include <linux/module.h>
64c2ce8b 54#include <linux/xattr.h>
c7a360b0 55#include <linux/utsname.h>
d310310c 56#include <linux/freezer.h>
1eb5d98f 57#include <linux/iversion.h>
1da177e4 58
4ce79717 59#include "nfs4_fs.h"
1da177e4 60#include "delegation.h"
101070ca 61#include "internal.h"
006ea73e 62#include "iostat.h"
fc931582 63#include "callback.h"
b1f69b75 64#include "pnfs.h"
f092075d 65#include "netns.h"
39d43d16 66#include "sysfs.h"
40c64c26 67#include "nfs4idmap.h"
73e39aaa 68#include "nfs4session.h"
de242c0b 69#include "fscache.h"
012a211a 70#include "nfs42.h"
1da177e4 71
c6d01c6f
TM		 72#include "nfs4trace.h"
73
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);
2ef61e0e
AS		 96static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
97 struct nfs_fattr *fattr, struct inode *inode);
a52458b4 98static int nfs4_do_setattr(struct inode *inode, const struct cred *cred,
0ab64e0e 99 struct nfs_fattr *fattr, struct iattr *sattr,
1b00ad65 100 struct nfs_open_context *ctx, struct nfs4_label *ilabel);
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
aa9c2669
DQ		 111
112#ifdef CONFIG_NFS_V4_SECURITY_LABEL
113static inline struct nfs4_label *
114nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
115 struct iattr *sattr, struct nfs4_label *label)
116{
117 int err;
118
119 if (label == NULL)
120 return NULL;
121
122 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0)
123 return NULL;
124
c528f70f
TM		 125 label->lfs = 0;
126 label->pi = 0;
127 label->len = 0;
128 label->label = NULL;
129
aa9c2669 130 err = security_dentry_init_security(dentry, sattr->ia_mode,
15bf3239
VG		 131 &dentry->d_name, NULL,
132 (void **)&label->label, &label->len);
aa9c2669
DQ		 133 if (err == 0)
134 return label;
135
136 return NULL;
137}
138static inline void
139nfs4_label_release_security(struct nfs4_label *label)
140{
141 if (label)
142 security_release_secctx(label->label, label->len);
143}
144static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
145{
146 if (label)
147 return server->attr_bitmask;
148
149 return server->attr_bitmask_nl;
150}
151#else
152static inline struct nfs4_label *
153nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
154 struct iattr *sattr, struct nfs4_label *l)
155{ return NULL; }
156static inline void
157nfs4_label_release_security(struct nfs4_label *label)
158{ return; }
159static inline u32 *
160nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
161{ return server->attr_bitmask; }
162#endif
163
1da177e4 164/* Prevent leaks of NFSv4 errors into userland */
46f72f57 165static int nfs4_map_errors(int err)
1da177e4 166{
52567b03
TM		 167 if (err >= -1000)
168 return err;
169 switch (err) {
170 case -NFS4ERR_RESOURCE:
30005121
WAA		 171 case -NFS4ERR_LAYOUTTRYLATER:
172 case -NFS4ERR_RECALLCONFLICT:
037e56a2 173 case -NFS4ERR_RETURNCONFLICT:
52567b03 174 return -EREMOTEIO;
7ebb9315 175 case -NFS4ERR_WRONGSEC:
8897538e 176 case -NFS4ERR_WRONG_CRED:
7ebb9315 177 return -EPERM;
3ddeb7c5
TM		 178 case -NFS4ERR_BADOWNER:
179 case -NFS4ERR_BADNAME:
180 return -EINVAL;
fb13bfa7
TM		 181 case -NFS4ERR_SHARE_DENIED:
182 return -EACCES;
f25efd85
SD		 183 case -NFS4ERR_MINOR_VERS_MISMATCH:
184 return -EPROTONOSUPPORT;
6e3cf241
TM		 185 case -NFS4ERR_FILE_OPEN:
186 return -EBUSY;
9fff59ed
TM		 187 case -NFS4ERR_NOT_SAME:
188 return -ENOTSYNC;
52567b03 189 default:
1da177e4 190 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 191 __func__, -err);
52567b03 192 break;
1da177e4 193 }
52567b03 194 return -EIO;
1da177e4
LT		 195}
196
197/*
198 * This is our standard bitmap for GETATTR requests.
199 */
1549210f 200const u32 nfs4_fattr_bitmap[3] = {
1da177e4
LT		 201 FATTR4_WORD0_TYPE
202 | FATTR4_WORD0_CHANGE
203 | FATTR4_WORD0_SIZE
204 | FATTR4_WORD0_FSID
205 | FATTR4_WORD0_FILEID,
206 FATTR4_WORD1_MODE
207 | FATTR4_WORD1_NUMLINKS
208 | FATTR4_WORD1_OWNER
209 | FATTR4_WORD1_OWNER_GROUP
210 | FATTR4_WORD1_RAWDEV
211 | FATTR4_WORD1_SPACE_USED
212 | FATTR4_WORD1_TIME_ACCESS
213 | FATTR4_WORD1_TIME_METADATA
ea96d1ec
AS		 214 | FATTR4_WORD1_TIME_MODIFY
215 | FATTR4_WORD1_MOUNTED_ON_FILEID,
aa9c2669
DQ		 216#ifdef CONFIG_NFS_V4_SECURITY_LABEL
217 FATTR4_WORD2_SECURITY_LABEL
218#endif
1da177e4
LT		 219};
220
1549210f
TM		 221static const u32 nfs4_pnfs_open_bitmap[3] = {
222 FATTR4_WORD0_TYPE
223 | FATTR4_WORD0_CHANGE
224 | FATTR4_WORD0_SIZE
225 | FATTR4_WORD0_FSID
226 | FATTR4_WORD0_FILEID,
227 FATTR4_WORD1_MODE
228 | FATTR4_WORD1_NUMLINKS
229 | FATTR4_WORD1_OWNER
230 | FATTR4_WORD1_OWNER_GROUP
231 | FATTR4_WORD1_RAWDEV
232 | FATTR4_WORD1_SPACE_USED
233 | FATTR4_WORD1_TIME_ACCESS
234 | FATTR4_WORD1_TIME_METADATA
235 | FATTR4_WORD1_TIME_MODIFY,
236 FATTR4_WORD2_MDSTHRESHOLD
95864c91
TM		 237#ifdef CONFIG_NFS_V4_SECURITY_LABEL
238 | FATTR4_WORD2_SECURITY_LABEL
239#endif
1549210f
TM		 240};
241
e23008ec
AA		 242static const u32 nfs4_open_noattr_bitmap[3] = {
243 FATTR4_WORD0_TYPE
e23008ec
AA		 244 | FATTR4_WORD0_FILEID,
245};
246
a09df2ca 247const u32 nfs4_statfs_bitmap[3] = {
1da177e4
LT		 248 FATTR4_WORD0_FILES_AVAIL
249 | FATTR4_WORD0_FILES_FREE
250 | FATTR4_WORD0_FILES_TOTAL,
251 FATTR4_WORD1_SPACE_AVAIL
252 | FATTR4_WORD1_SPACE_FREE
253 | FATTR4_WORD1_SPACE_TOTAL
254};
255
a09df2ca 256const u32 nfs4_pathconf_bitmap[3] = {
1da177e4
LT		 257 FATTR4_WORD0_MAXLINK
258 | FATTR4_WORD0_MAXNAME,
259 0
260};
261
dae100c2 262const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
1da177e4
LT		 263 | FATTR4_WORD0_MAXREAD
264 | FATTR4_WORD0_MAXWRITE
265 | FATTR4_WORD0_LEASE_TIME,
55b6e774 266 FATTR4_WORD1_TIME_DELTA
dae100c2
FI		 267 | FATTR4_WORD1_FS_LAYOUT_TYPES,
268 FATTR4_WORD2_LAYOUT_BLKSIZE
2a92ee92 269 | FATTR4_WORD2_CLONE_BLKSIZE
7f08a335 270 | FATTR4_WORD2_CHANGE_ATTR_TYPE
b78ef845 271 | FATTR4_WORD2_XATTR_SUPPORT
1da177e4
LT		 272};
273
a09df2ca 274const u32 nfs4_fs_locations_bitmap[3] = {
c05cefcc 275 FATTR4_WORD0_CHANGE
830b8e33
MN		 276 | FATTR4_WORD0_SIZE
277 | FATTR4_WORD0_FSID
278 | FATTR4_WORD0_FILEID
279 | FATTR4_WORD0_FS_LOCATIONS,
c05cefcc 280 FATTR4_WORD1_OWNER
830b8e33
MN		 281 | FATTR4_WORD1_OWNER_GROUP
282 | FATTR4_WORD1_RAWDEV
283 | FATTR4_WORD1_SPACE_USED
284 | FATTR4_WORD1_TIME_ACCESS
285 | FATTR4_WORD1_TIME_METADATA
286 | FATTR4_WORD1_TIME_MODIFY
a09df2ca 287 | FATTR4_WORD1_MOUNTED_ON_FILEID,
830b8e33
MN		 288};
289
30846df0 290static void nfs4_bitmap_copy_adjust(__u32 *dst, const __u32 *src,
a71029b8 291 struct inode *inode, unsigned long flags)
30846df0
TM		 292{
293 unsigned long cache_validity;
294
295 memcpy(dst, src, NFS4_BITMASK_SZ*sizeof(*dst));
296 if (!inode || !nfs4_have_delegation(inode, FMODE_READ))
297 return;
298
a71029b8 299 cache_validity = READ_ONCE(NFS_I(inode)->cache_validity) | flags;
30846df0 300
a71029b8
TM		 301 /* Remove the attributes over which we have full control */
302 dst[1] &= ~FATTR4_WORD1_RAWDEV;
30846df0
TM		 303 if (!(cache_validity & NFS_INO_INVALID_SIZE))
304 dst[0] &= ~FATTR4_WORD0_SIZE;
305
306 if (!(cache_validity & NFS_INO_INVALID_CHANGE))
307 dst[0] &= ~FATTR4_WORD0_CHANGE;
30846df0 308
720869eb
TM		 309 if (!(cache_validity & NFS_INO_INVALID_MODE))
310 dst[1] &= ~FATTR4_WORD1_MODE;
a71029b8 311 if (!(cache_validity & NFS_INO_INVALID_OTHER))
720869eb 312 dst[1] &= ~(FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP);
30846df0
TM		 313}
314
bc4785cd 315static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 316 struct nfs4_readdir_arg *readdir)
317{
18fe6a23 318 unsigned int attrs = FATTR4_WORD0_FILEID | FATTR4_WORD0_TYPE;
0dbb4c67 319 __be32 *start, *p;
1da177e4 320
1da177e4 321 if (cookie > 2) {
b7ef1956 322 readdir->cookie = cookie;
1da177e4
LT		 323 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
324 return;
325 }
326
327 readdir->cookie = 0;
328 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
329 if (cookie == 2)
330 return;
331
332 /*
333 * NFSv4 servers do not return entries for '.' and '..'
334 * Therefore, we fake these entries here. We let '.'
335 * have cookie 0 and '..' have cookie 1. Note that
336 * when talking to the server, we always send cookie 0
337 * instead of 1 or 2.
338 */
2b86ce2d 339 start = p = kmap_atomic(*readdir->pages);
1da177e4
LT		 340
341 if (cookie == 0) {
342 *p++ = xdr_one; /* next */
343 *p++ = xdr_zero; /* cookie, first word */
344 *p++ = xdr_one; /* cookie, second word */
345 *p++ = xdr_one; /* entry len */
346 memcpy(p, ".\0\0\0", 4); /* entry */
347 p++;
348 *p++ = xdr_one; /* bitmap length */
18fe6a23
AS		 349 *p++ = htonl(attrs); /* bitmap */
350 *p++ = htonl(12); /* attribute buffer length */
351 *p++ = htonl(NF4DIR);
2b0143b5 352 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry)));
1da177e4
LT		 353 }
354
355 *p++ = xdr_one; /* next */
356 *p++ = xdr_zero; /* cookie, first word */
357 *p++ = xdr_two; /* cookie, second word */
358 *p++ = xdr_two; /* entry len */
359 memcpy(p, "..\0\0", 4); /* entry */
360 p++;
361 *p++ = xdr_one; /* bitmap length */
18fe6a23
AS		 362 *p++ = htonl(attrs); /* bitmap */
363 *p++ = htonl(12); /* attribute buffer length */
364 *p++ = htonl(NF4DIR);
2b0143b5 365 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry->d_parent)));
1da177e4
LT		 366
367 readdir->pgbase = (char *)p - (char *)start;
368 readdir->count -= readdir->pgbase;
2b86ce2d 369 kunmap_atomic(start);
1da177e4
LT		 370}
371
00c94ebe
TM		 372static void nfs4_fattr_set_prechange(struct nfs_fattr *fattr, u64 version)
373{
374 if (!(fattr->valid & NFS_ATTR_FATTR_PRECHANGE)) {
375 fattr->pre_change_attr = version;
376 fattr->valid |= NFS_ATTR_FATTR_PRECHANGE;
377 }
378}
379
26d36301
TM		 380static void nfs4_test_and_free_stateid(struct nfs_server *server,
381 nfs4_stateid *stateid,
a52458b4 382 const struct cred *cred)
26d36301
TM		 383{
384 const struct nfs4_minor_version_ops *ops = server->nfs_client->cl_mvops;
385
386 ops->test_and_free_expired(server, stateid, cred);
387}
388
389static void __nfs4_free_revoked_stateid(struct nfs_server *server,
390 nfs4_stateid *stateid,
a52458b4 391 const struct cred *cred)
26d36301
TM		 392{
393 stateid->type = NFS4_REVOKED_STATEID_TYPE;
394 nfs4_test_and_free_stateid(server, stateid, cred);
395}
396
397static void nfs4_free_revoked_stateid(struct nfs_server *server,
398 const nfs4_stateid *stateid,
a52458b4 399 const struct cred *cred)
26d36301
TM		 400{
401 nfs4_stateid tmp;
402
403 nfs4_stateid_copy(&tmp, stateid);
404 __nfs4_free_revoked_stateid(server, &tmp, cred);
405}
406
8478eaa1
N		 407static long nfs4_update_delay(long *timeout)
408{
409 long ret;
410 if (!timeout)
411 return NFS4_POLL_RETRY_MAX;
412 if (*timeout <= 0)
413 *timeout = NFS4_POLL_RETRY_MIN;
414 if (*timeout > NFS4_POLL_RETRY_MAX)
415 *timeout = NFS4_POLL_RETRY_MAX;
416 ret = *timeout;
417 *timeout <<= 1;
418 return ret;
419}
420
0688e64b 421static int nfs4_delay_killable(long *timeout)
65de872e 422{
65de872e
TM		 423 might_sleep();
424
f5d39b02
PZ		 425 __set_current_state(TASK_KILLABLE|TASK_FREEZABLE_UNSAFE);
426 schedule_timeout(nfs4_update_delay(timeout));
0688e64b
TM		 427 if (!__fatal_signal_pending(current))
428 return 0;
429 return -EINTR;
430}
431
432static int nfs4_delay_interruptible(long *timeout)
433{
434 might_sleep();
435
f5d39b02
PZ		 436 __set_current_state(TASK_INTERRUPTIBLE|TASK_FREEZABLE_UNSAFE);
437 schedule_timeout(nfs4_update_delay(timeout));
0688e64b
TM		 438 if (!signal_pending(current))
439 return 0;
440 return __fatal_signal_pending(current) ? -EINTR :-ERESTARTSYS;
441}
442
443static int nfs4_delay(long *timeout, bool interruptible)
444{
445 if (interruptible)
446 return nfs4_delay_interruptible(timeout);
447 return nfs4_delay_killable(timeout);
65de872e
TM		 448}
449
50c80007
TM		 450static const nfs4_stateid *
451nfs4_recoverable_stateid(const nfs4_stateid *stateid)
452{
453 if (!stateid)
454 return NULL;
455 switch (stateid->type) {
456 case NFS4_OPEN_STATEID_TYPE:
457 case NFS4_LOCK_STATEID_TYPE:
458 case NFS4_DELEGATION_STATEID_TYPE:
459 return stateid;
460 default:
461 break;
462 }
463 return NULL;
464}
465
65de872e
TM		 466/* This is the error handling routine for processes that are allowed
467 * to sleep.
468 */
b3c2aa07
TM		 469static int nfs4_do_handle_exception(struct nfs_server *server,
470 int errorcode, struct nfs4_exception *exception)
65de872e
TM		 471{
472 struct nfs_client *clp = server->nfs_client;
9e33bed5 473 struct nfs4_state *state = exception->state;
50c80007 474 const nfs4_stateid *stateid;
3114ea7a 475 struct inode *inode = exception->inode;
65de872e
TM		 476 int ret = errorcode;
477
b3c2aa07
TM		 478 exception->delay = 0;
479 exception->recovering = 0;
65de872e 480 exception->retry = 0;
272289a3 481
50c80007 482 stateid = nfs4_recoverable_stateid(exception->stateid);
272289a3 483 if (stateid == NULL && state != NULL)
50c80007 484 stateid = nfs4_recoverable_stateid(&state->stateid);
272289a3 485
65de872e
TM		 486 switch(errorcode) {
487 case 0:
488 return 0;
cf61eb26
TM		 489 case -NFS4ERR_BADHANDLE:
490 case -ESTALE:
491 if (inode != NULL && S_ISREG(inode->i_mode))
492 pnfs_destroy_layout(NFS_I(inode));
493 break;
5ba12443
TM		 494 case -NFS4ERR_DELEG_REVOKED:
495 case -NFS4ERR_ADMIN_REVOKED:
272289a3 496 case -NFS4ERR_EXPIRED:
5ba12443 497 case -NFS4ERR_BAD_STATEID:
fefa1a81 498 case -NFS4ERR_PARTNER_NO_AUTH:
272289a3
TM		 499 if (inode != NULL && stateid != NULL) {
500 nfs_inode_find_state_and_recover(inode,
501 stateid);
502 goto wait_on_recovery;
503 }
df561f66 504 fallthrough;
272289a3 505 case -NFS4ERR_OPENMODE:
8487c479
TM		 506 if (inode) {
507 int err;
508
509 err = nfs_async_inode_return_delegation(inode,
510 stateid);
511 if (err == 0)
512 goto wait_on_recovery;
513 if (stateid != NULL && stateid->type == NFS4_DELEGATION_STATEID_TYPE) {
514 exception->retry = 1;
515 break;
516 }
517 }
3114ea7a
TM		 518 if (state == NULL)
519 break;
5d422301
TM		 520 ret = nfs4_schedule_stateid_recovery(server, state);
521 if (ret < 0)
522 break;
3114ea7a 523 goto wait_on_recovery;
65de872e 524 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 525 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 526 nfs4_schedule_lease_recovery(clp);
527 goto wait_on_recovery;
519ae255
CL		 528 case -NFS4ERR_MOVED:
529 ret = nfs4_schedule_migration_recovery(server);
530 if (ret < 0)
531 break;
532 goto wait_on_recovery;
8ef2f8d4
CL		 533 case -NFS4ERR_LEASE_MOVED:
534 nfs4_schedule_lease_moved_recovery(clp);
535 goto wait_on_recovery;
03391693 536#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 537 case -NFS4ERR_BADSESSION:
538 case -NFS4ERR_BADSLOT:
539 case -NFS4ERR_BAD_HIGH_SLOT:
540 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
541 case -NFS4ERR_DEADSESSION:
542 case -NFS4ERR_SEQ_FALSE_RETRY:
543 case -NFS4ERR_SEQ_MISORDERED:
5c441544 544 /* Handled in nfs41_sequence_process() */
399f11c3 545 goto wait_on_recovery;
03391693 546#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 547 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 548 if (exception->timeout > HZ) {
549 /* We have retried a decent amount, time to
550 * fail
551 */
552 ret = -EBUSY;
553 break;
554 }
df561f66 555 fallthrough;
65de872e 556 case -NFS4ERR_DELAY:
2598ed34 557 nfs_inc_server_stats(server, NFSIOS_DELAY);
df561f66 558 fallthrough;
2598ed34 559 case -NFS4ERR_GRACE:
e85d7ee4 560 case -NFS4ERR_LAYOUTTRYLATER:
183d9e7b 561 case -NFS4ERR_RECALLCONFLICT:
037e56a2 562 case -NFS4ERR_RETURNCONFLICT:
b3c2aa07
TM		 563 exception->delay = 1;
564 return 0;
565
a8a4ae3a 566 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 567 case -NFS4ERR_OLD_STATEID:
568 exception->retry = 1;
b064eca2
TM		 569 break;
570 case -NFS4ERR_BADOWNER:
571 /* The following works around a Linux server bug! */
572 case -NFS4ERR_BADNAME:
573 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
574 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
575 exception->retry = 1;
576 printk(KERN_WARNING "NFS: v4 server %s "
577 "does not accept raw "
578 "uid/gids. "
579 "Reenabling the idmapper.\n",
580 server->nfs_client->cl_hostname);
581 }
65de872e
TM		 582 }
583 /* We failed to handle the error */
584 return nfs4_map_errors(ret);
0400a6b0 585wait_on_recovery:
b3c2aa07
TM		 586 exception->recovering = 1;
587 return 0;
588}
589
5b9d31ae
TM		 590/*
591 * Track the number of NFS4ERR_DELAY related retransmissions and return
592 * EAGAIN if the 'softerr' mount option is set, and we've exceeded the limit
593 * set by 'nfs_delay_retrans'.
594 */
595static int nfs4_exception_should_retrans(const struct nfs_server *server,
596 struct nfs4_exception *exception)
597{
598 if (server->flags & NFS_MOUNT_SOFTERR && nfs_delay_retrans >= 0) {
599 if (exception->retrans++ >= (unsigned short)nfs_delay_retrans)
600 return -EAGAIN;
601 }
602 return 0;
603}
604
b3c2aa07
TM		 605/* This is the error handling routine for processes that are allowed
606 * to sleep.
607 */
608int nfs4_handle_exception(struct nfs_server *server, 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) {
5b9d31ae
TM		 615 int ret2 = nfs4_exception_should_retrans(server, exception);
616 if (ret2 < 0) {
617 exception->retry = 0;
618 return ret2;
619 }
0688e64b
TM		 620 ret = nfs4_delay(&exception->timeout,
621 exception->interruptible);
b3c2aa07
TM		 622 goto out_retry;
623 }
624 if (exception->recovering) {
dfe1fe75
TM		 625 if (exception->task_is_privileged)
626 return -EDEADLOCK;
b3c2aa07
TM		 627 ret = nfs4_wait_clnt_recover(clp);
628 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
629 return -EIO;
630 goto out_retry;
631 }
632 return ret;
633out_retry:
a2c0b9e2
TM		 634 if (ret == 0)
635 exception->retry = 1;
636 return ret;
65de872e
TM		 637}
638
037fc980
TM		 639static int
640nfs4_async_handle_exception(struct rpc_task *task, struct nfs_server *server,
641 int errorcode, struct nfs4_exception *exception)
642{
643 struct nfs_client *clp = server->nfs_client;
644 int ret;
645
646 ret = nfs4_do_handle_exception(server, errorcode, exception);
647 if (exception->delay) {
5b9d31ae
TM		 648 int ret2 = nfs4_exception_should_retrans(server, exception);
649 if (ret2 < 0) {
650 exception->retry = 0;
651 return ret2;
652 }
037fc980
TM		 653 rpc_delay(task, nfs4_update_delay(&exception->timeout));
654 goto out_retry;
655 }
656 if (exception->recovering) {
dfe1fe75
TM		 657 if (exception->task_is_privileged)
658 return -EDEADLOCK;
037fc980
TM		 659 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
660 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
661 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
662 goto out_retry;
663 }
519ae255 664 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
037fc980
TM		 665 ret = -EIO;
666 return ret;
667out_retry:
0f90be13 668 if (ret == 0) {
a2c0b9e2 669 exception->retry = 1;
0f90be13
BB		 670 /*
671 * For NFS4ERR_MOVED, the client transport will need to
672 * be recomputed after migration recovery has completed.
673 */
674 if (errorcode == -NFS4ERR_MOVED)
675 rpc_task_release_transport(task);
676 }
a2c0b9e2 677 return ret;
65de872e
TM		 678}
679
0f913a57 680int
037fc980
TM		 681nfs4_async_handle_error(struct rpc_task *task, struct nfs_server *server,
682 struct nfs4_state *state, long *timeout)
683{
684 struct nfs4_exception exception = {
685 .state = state,
686 };
687
688 if (task->tk_status >= 0)
689 return 0;
690 if (timeout)
691 exception.timeout = *timeout;
692 task->tk_status = nfs4_async_handle_exception(task, server,
693 task->tk_status,
694 &exception);
695 if (exception.delay && timeout)
696 *timeout = exception.timeout;
697 if (exception.retry)
698 return -EAGAIN;
699 return 0;
700}
701
a5250def
WAA		 702/*
703 * Return 'true' if 'clp' is using an rpc_client that is integrity protected
704 * or 'false' otherwise.
705 */
706static bool _nfs4_is_integrity_protected(struct nfs_client *clp)
707{
708 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor;
eeea5361 709 return (flavor == RPC_AUTH_GSS_KRB5I) || (flavor == RPC_AUTH_GSS_KRB5P);
a5250def 710}
65de872e 711
452e9352 712static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 713{
1da177e4
LT		 714 spin_lock(&clp->cl_lock);
715 if (time_before(clp->cl_last_renewal,timestamp))
716 clp->cl_last_renewal = timestamp;
717 spin_unlock(&clp->cl_lock);
718}
719
452e9352
TM		 720static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
721{
be824167
TM		 722 struct nfs_client *clp = server->nfs_client;
723
724 if (!nfs4_has_session(clp))
725 do_renew_lease(clp, timestamp);
452e9352
TM		 726}
727
2a3eb2b9
CL		 728struct nfs4_call_sync_data {
729 const struct nfs_server *seq_server;
730 struct nfs4_sequence_args *seq_args;
731 struct nfs4_sequence_res *seq_res;
732};
733
be3a5d23 734void nfs4_init_sequence(struct nfs4_sequence_args *args,
fba83f34
AS		 735 struct nfs4_sequence_res *res, int cache_reply,
736 int privileged)
a9c92d6b
CL		 737{
738 args->sa_slot = NULL;
739 args->sa_cache_this = cache_reply;
fba83f34 740 args->sa_privileged = privileged;
a9c92d6b
CL		 741
742 res->sr_slot = NULL;
743}
744
2e80dbe7 745static void nfs40_sequence_free_slot(struct nfs4_sequence_res *res)
3bd2384a
CL		 746{
747 struct nfs4_slot *slot = res->sr_slot;
748 struct nfs4_slot_table *tbl;
749
3bd2384a
CL		 750 tbl = slot->table;
751 spin_lock(&tbl->slot_tbl_lock);
752 if (!nfs41_wake_and_assign_slot(tbl, slot))
753 nfs4_free_slot(tbl, slot);
754 spin_unlock(&tbl->slot_tbl_lock);
755
756 res->sr_slot = NULL;
2e80dbe7
TM		 757}
758
759static int nfs40_sequence_done(struct rpc_task *task,
760 struct nfs4_sequence_res *res)
761{
762 if (res->sr_slot != NULL)
763 nfs40_sequence_free_slot(res);
3bd2384a
CL		 764 return 1;
765}
766
cccef3b9
AA		 767#if defined(CONFIG_NFS_V4_1)
768
3be0f80b 769static void nfs41_release_slot(struct nfs4_slot *slot)
13615871 770{
e3725ec0 771 struct nfs4_session *session;
13615871 772 struct nfs4_slot_table *tbl;
c10e4498 773 bool send_new_highest_used_slotid = false;
13615871 774
3be0f80b
TM		 775 if (!slot)
776 return;
a13ce7c6 777 tbl = slot->table;
e3725ec0 778 session = tbl->session;
ea028ac9 779
07e8dcbd
TM		 780 /* Bump the slot sequence number */
781 if (slot->seq_done)
782 slot->seq_nr++;
783 slot->seq_done = 0;
784
35dc1d74 785 spin_lock(&tbl->slot_tbl_lock);
c10e4498
TM		 786 /* Be nice to the server: try to ensure that the last transmitted
787 * value for highest_user_slotid <= target_highest_slotid
788 */
789 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
790 send_new_highest_used_slotid = true;
791
a13ce7c6 792 if (nfs41_wake_and_assign_slot(tbl, slot)) {
b75ad4cd
TM		 793 send_new_highest_used_slotid = false;
794 goto out_unlock;
795 }
a13ce7c6 796 nfs4_free_slot(tbl, slot);
c10e4498
TM		 797
798 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
799 send_new_highest_used_slotid = false;
b75ad4cd 800out_unlock:
35dc1d74 801 spin_unlock(&tbl->slot_tbl_lock);
c10e4498 802 if (send_new_highest_used_slotid)
3f10a6af 803 nfs41_notify_server(session->clp);
045d2a6d
TM		 804 if (waitqueue_active(&tbl->slot_waitq))
805 wake_up_all(&tbl->slot_waitq);
13615871
AA		 806}
807
3be0f80b
TM		 808static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
809{
810 nfs41_release_slot(res->sr_slot);
811 res->sr_slot = NULL;
812}
813
3453d570
TM		 814static void nfs4_slot_sequence_record_sent(struct nfs4_slot *slot,
815 u32 seqnr)
816{
817 if ((s32)(seqnr - slot->seq_nr_highest_sent) > 0)
818 slot->seq_nr_highest_sent = seqnr;
819}
f07a5d24 820static void nfs4_slot_sequence_acked(struct nfs4_slot *slot, u32 seqnr)
3453d570 821{
f07a5d24 822 nfs4_slot_sequence_record_sent(slot, seqnr);
3453d570
TM		 823 slot->seq_nr_last_acked = seqnr;
824}
825
913fadc5
AS		 826static void nfs4_probe_sequence(struct nfs_client *client, const struct cred *cred,
827 struct nfs4_slot *slot)
828{
829 struct rpc_task *task = _nfs41_proc_sequence(client, cred, slot, true);
830 if (!IS_ERR(task))
831 rpc_put_task_async(task);
832}
833
2e80dbe7
TM		 834static int nfs41_sequence_process(struct rpc_task *task,
835 struct nfs4_sequence_res *res)
b0df806c 836{
e3725ec0 837 struct nfs4_session *session;
a13ce7c6 838 struct nfs4_slot *slot = res->sr_slot;
14516c3a 839 struct nfs_client *clp;
5c441544 840 int status;
85563073 841 int ret = 1;
b0df806c 842
a13ce7c6
TM		 843 if (slot == NULL)
844 goto out_noaction;
468f8613 845 /* don't increment the sequence number if the task wasn't sent */
c71c46f0 846 if (!RPC_WAS_SENT(task) || slot->seq_done)
b0df806c
AA		 847 goto out;
848
e3725ec0 849 session = slot->table->session;
913fadc5 850 clp = session->clp;
933602e3 851
2f92ae34 852 trace_nfs4_sequence_done(session, res);
5c441544
TM		 853
854 status = res->sr_status;
855 if (task->tk_status == -NFS4ERR_DEADSESSION)
856 status = -NFS4ERR_DEADSESSION;
857
691daf3b 858 /* Check the SEQUENCE operation status */
5c441544 859 switch (status) {
14516c3a 860 case 0:
3453d570
TM		 861 /* Mark this sequence number as having been acked */
862 nfs4_slot_sequence_acked(slot, slot->seq_nr);
b0df806c 863 /* Update the slot's sequence and clientid lease timer */
07e8dcbd 864 slot->seq_done = 1;
8e63b6a8 865 do_renew_lease(clp, res->sr_timestamp);
0629e370 866 /* Check sequence flags */
0a014a44
TM		 867 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags,
868 !!slot->privileged);
464ee9f9 869 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a 870 break;
ac20d163
TM		 871 case 1:
872 /*
873 * sr_status remains 1 if an RPC level error occurred.
874 * The server may or may not have processed the sequence
875 * operation..
ac20d163 876 */
3453d570
TM		 877 nfs4_slot_sequence_record_sent(slot, slot->seq_nr);
878 slot->seq_done = 1;
ac20d163 879 goto out;
14516c3a
TM		 880 case -NFS4ERR_DELAY:
881 /* The server detected a resend of the RPC call and
882 * returned NFS4ERR_DELAY as per Section 2.10.6.2
883 * of RFC5661.
884 */
df2fabff 885 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 886 __func__,
df2fabff 887 slot->slot_nr,
933602e3 888 slot->seq_nr);
14516c3a 889 goto out_retry;
f9312a54
TM		 890 case -NFS4ERR_RETRY_UNCACHED_REP:
891 case -NFS4ERR_SEQ_FALSE_RETRY:
892 /*
893 * The server thinks we tried to replay a request.
894 * Retry the call after bumping the sequence ID.
895 */
3453d570 896 nfs4_slot_sequence_acked(slot, slot->seq_nr);
f9312a54 897 goto retry_new_seq;
85563073
TM		 898 case -NFS4ERR_BADSLOT:
899 /*
900 * The slot id we used was probably retired. Try again
901 * using a different slot id.
902 */
99589100 903 if (slot->slot_nr < slot->table->target_highest_slotid)
3be0f80b 904 goto session_recover;
e8794440
TM		 905 goto retry_nowait;
906 case -NFS4ERR_SEQ_MISORDERED:
3453d570 907 nfs4_slot_sequence_record_sent(slot, slot->seq_nr);
ac20d163 908 /*
3453d570
TM		 909 * Were one or more calls using this slot interrupted?
910 * If the server never received the request, then our
913fadc5
AS		 911 * transmitted slot sequence number may be too high. However,
912 * if the server did receive the request then it might
913 * accidentally give us a reply with a mismatched operation.
914 * We can sort this out by sending a lone sequence operation
915 * to the server on the same slot.
e8794440 916 */
3453d570
TM		 917 if ((s32)(slot->seq_nr - slot->seq_nr_last_acked) > 1) {
918 slot->seq_nr--;
913fadc5
AS		 919 if (task->tk_msg.rpc_proc != &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE]) {
920 nfs4_probe_sequence(clp, task->tk_msg.rpc_cred, slot);
921 res->sr_slot = NULL;
922 }
8e63b6a8
TM		 923 goto retry_nowait;
924 }
3453d570
TM		 925 /*
926 * RFC5661:
927 * A retry might be sent while the original request is
928 * still in progress on the replier. The replier SHOULD
929 * deal with the issue by returning NFS4ERR_DELAY as the
930 * reply to SEQUENCE or CB_SEQUENCE operation, but
931 * implementations MAY return NFS4ERR_SEQ_MISORDERED.
932 *
933 * Restart the search after a delay.
934 */
935 slot->seq_nr = slot->seq_nr_highest_sent;
936 goto out_retry;
5c441544
TM		 937 case -NFS4ERR_BADSESSION:
938 case -NFS4ERR_DEADSESSION:
939 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
940 goto session_recover;
14516c3a
TM		 941 default:
942 /* Just update the slot sequence no. */
07e8dcbd 943 slot->seq_done = 1;
b0df806c
AA		 944 }
945out:
946 /* The session may be reset by one of the error handlers. */
947 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
a13ce7c6 948out_noaction:
85563073 949 return ret;
3be0f80b 950session_recover:
c907e72f 951 set_bit(NFS4_SLOT_TBL_DRAINING, &session->fc_slot_table.slot_tbl_state);
5c441544
TM		 952 nfs4_schedule_session_recovery(session, status);
953 dprintk("%s ERROR: %d Reset session\n", __func__, status);
954 nfs41_sequence_free_slot(res);
955 goto out;
3be0f80b
TM		 956retry_new_seq:
957 ++slot->seq_nr;
e8794440
TM		 958retry_nowait:
959 if (rpc_restart_call_prepare(task)) {
2e80dbe7 960 nfs41_sequence_free_slot(res);
e8794440
TM		 961 task->tk_status = 0;
962 ret = 0;
963 }
964 goto out;
14516c3a 965out_retry:
d05dd4e9 966 if (!rpc_restart_call(task))
14516c3a
TM		 967 goto out;
968 rpc_delay(task, NFS4_POLL_RETRY_MAX);
969 return 0;
b0df806c 970}
2e80dbe7
TM		 971
972int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
973{
974 if (!nfs41_sequence_process(task, res))
975 return 0;
976 if (res->sr_slot != NULL)
977 nfs41_sequence_free_slot(res);
978 return 1;
979
980}
f9c96fcc 981EXPORT_SYMBOL_GPL(nfs41_sequence_done);
b0df806c 982
2e80dbe7
TM		 983static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res)
984{
985 if (res->sr_slot == NULL)
986 return 1;
987 if (res->sr_slot->table->session != NULL)
988 return nfs41_sequence_process(task, res);
989 return nfs40_sequence_done(task, res);
990}
991
992static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res)
993{
994 if (res->sr_slot != NULL) {
995 if (res->sr_slot->table->session != NULL)
996 nfs41_sequence_free_slot(res);
997 else
998 nfs40_sequence_free_slot(res);
999 }
1000}
1001
2c4b131d 1002int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
df896455 1003{
e3725ec0 1004 if (res->sr_slot == NULL)
14516c3a 1005 return 1;
3bd2384a
CL		 1006 if (!res->sr_slot->table->session)
1007 return nfs40_sequence_done(task, res);
14516c3a 1008 return nfs41_sequence_done(task, res);
df896455 1009}
2c4b131d 1010EXPORT_SYMBOL_GPL(nfs4_sequence_done);
df896455 1011
ce5039c1
AA		 1012static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
1013{
2a3eb2b9 1014 struct nfs4_call_sync_data *data = calldata;
ce5039c1 1015
035168ab
TM		 1016 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
1017
7981c8a6
AS		 1018 nfs4_setup_sequence(data->seq_server->nfs_client,
1019 data->seq_args, data->seq_res, task);
ce5039c1
AA		 1020}
1021
69ab40c4
AA		 1022static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
1023{
2a3eb2b9 1024 struct nfs4_call_sync_data *data = calldata;
69ab40c4 1025
14516c3a 1026 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 1027}
1028
17280175 1029static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 1030 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 1031 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 1032};
1033
3bd2384a
CL		 1034#else /* !CONFIG_NFS_V4_1 */
1035
2e80dbe7
TM		 1036static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res)
1037{
1038 return nfs40_sequence_done(task, res);
1039}
1040
1041static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res)
1042{
1043 if (res->sr_slot != NULL)
1044 nfs40_sequence_free_slot(res);
1045}
1046
2c4b131d
PT		 1047int nfs4_sequence_done(struct rpc_task *task,
1048 struct nfs4_sequence_res *res)
9915ea7e 1049{
3bd2384a 1050 return nfs40_sequence_done(task, res);
9915ea7e 1051}
2c4b131d 1052EXPORT_SYMBOL_GPL(nfs4_sequence_done);
3bd2384a
CL		 1053
1054#endif /* !CONFIG_NFS_V4_1 */
9915ea7e 1055
c1dffe0b
TM		 1056static void nfs41_sequence_res_init(struct nfs4_sequence_res *res)
1057{
1058 res->sr_timestamp = jiffies;
1059 res->sr_status_flags = 0;
1060 res->sr_status = 1;
1061}
1062
3be0f80b
TM		 1063static
1064void nfs4_sequence_attach_slot(struct nfs4_sequence_args *args,
1065 struct nfs4_sequence_res *res,
1066 struct nfs4_slot *slot)
1067{
1068 if (!slot)
1069 return;
1070 slot->privileged = args->sa_privileged ? 1 : 0;
1071 args->sa_slot = slot;
1072
1073 res->sr_slot = slot;
3be0f80b
TM		 1074}
1075
1076int nfs4_setup_sequence(struct nfs_client *client,
7981c8a6
AS		 1077 struct nfs4_sequence_args *args,
1078 struct nfs4_sequence_res *res,
1079 struct rpc_task *task)
1080{
7981c8a6 1081 struct nfs4_session *session = nfs4_get_session(client);
76ee0354 1082 struct nfs4_slot_table *tbl = client->cl_slot_tbl;
3d35808b 1083 struct nfs4_slot *slot;
7981c8a6 1084
9dd9107f
AS		 1085 /* slot already allocated? */
1086 if (res->sr_slot != NULL)
1087 goto out_start;
1088
6b2e6856 1089 if (session)
76ee0354 1090 tbl = &session->fc_slot_table;
76ee0354 1091
3453d570
TM		 1092 spin_lock(&tbl->slot_tbl_lock);
1093 /* The state manager will wait until the slot table is empty */
1094 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
1095 goto out_sleep;
1096
1097 slot = nfs4_alloc_slot(tbl);
1098 if (IS_ERR(slot)) {
3453d570 1099 if (slot == ERR_PTR(-ENOMEM))
6b2e6856 1100 goto out_sleep_timeout;
3453d570 1101 goto out_sleep;
3d35808b 1102 }
3453d570 1103 spin_unlock(&tbl->slot_tbl_lock);
3d35808b 1104
3be0f80b 1105 nfs4_sequence_attach_slot(args, res, slot);
3d35808b 1106
ad05cc0f 1107 trace_nfs4_setup_sequence(session, args);
9dd9107f 1108out_start:
c1dffe0b 1109 nfs41_sequence_res_init(res);
9dd9107f
AS		 1110 rpc_call_start(task);
1111 return 0;
6b2e6856
TM		 1112out_sleep_timeout:
1113 /* Try again in 1/4 second */
1114 if (args->sa_privileged)
1115 rpc_sleep_on_priority_timeout(&tbl->slot_tbl_waitq, task,
1116 jiffies + (HZ >> 2), RPC_PRIORITY_PRIVILEGED);
1117 else
1118 rpc_sleep_on_timeout(&tbl->slot_tbl_waitq, task,
1119 NULL, jiffies + (HZ >> 2));
1120 spin_unlock(&tbl->slot_tbl_lock);
1121 return -EAGAIN;
0dcee8bb
AS		 1122out_sleep:
1123 if (args->sa_privileged)
1124 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
8357a9b6 1125 RPC_PRIORITY_PRIVILEGED);
0dcee8bb
AS		 1126 else
1127 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
1128 spin_unlock(&tbl->slot_tbl_lock);
1129 return -EAGAIN;
7981c8a6
AS		 1130}
1131EXPORT_SYMBOL_GPL(nfs4_setup_sequence);
1132
9915ea7e
CL		 1133static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
1134{
1135 struct nfs4_call_sync_data *data = calldata;
42e1cca7 1136 nfs4_setup_sequence(data->seq_server->nfs_client,
9915ea7e
CL		 1137 data->seq_args, data->seq_res, task);
1138}
1139
1140static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
1141{
1142 struct nfs4_call_sync_data *data = calldata;
1143 nfs4_sequence_done(task, data->seq_res);
1144}
1145
1146static const struct rpc_call_ops nfs40_call_sync_ops = {
1147 .rpc_call_prepare = nfs40_call_sync_prepare,
1148 .rpc_call_done = nfs40_call_sync_done,
1149};
1150
48c05854
AS		 1151static int nfs4_call_sync_custom(struct rpc_task_setup *task_setup)
1152{
1153 int ret;
1154 struct rpc_task *task;
1155
1156 task = rpc_run_task(task_setup);
1157 if (IS_ERR(task))
1158 return PTR_ERR(task);
1159
1160 ret = task->tk_status;
1161 rpc_put_task(task);
1162 return ret;
1163}
1164
c74dfe97
TM		 1165static int nfs4_do_call_sync(struct rpc_clnt *clnt,
1166 struct nfs_server *server,
1167 struct rpc_message *msg,
1168 struct nfs4_sequence_args *args,
1169 struct nfs4_sequence_res *res,
1170 unsigned short task_flags)
ce5039c1 1171{
9915ea7e 1172 struct nfs_client *clp = server->nfs_client;
2a3eb2b9 1173 struct nfs4_call_sync_data data = {
035168ab 1174 .seq_server = server,
ce5039c1
AA		 1175 .seq_args = args,
1176 .seq_res = res,
ce5039c1
AA		 1177 };
1178 struct rpc_task_setup task_setup = {
7c513058 1179 .rpc_client = clnt,
ce5039c1 1180 .rpc_message = msg,
9915ea7e 1181 .callback_ops = clp->cl_mvops->call_sync_ops,
c74dfe97
TM		 1182 .callback_data = &data,
1183 .flags = task_flags,
ce5039c1
AA		 1184 };
1185
48c05854 1186 return nfs4_call_sync_custom(&task_setup);
ce5039c1
AA		 1187}
1188
c74dfe97
TM		 1189static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
1190 struct nfs_server *server,
1191 struct rpc_message *msg,
1192 struct nfs4_sequence_args *args,
1193 struct nfs4_sequence_res *res)
1194{
85e39fee
OK		 1195 unsigned short task_flags = 0;
1196
118f09ed 1197 if (server->caps & NFS_CAP_MOVEABLE)
85e39fee
OK		 1198 task_flags = RPC_TASK_MOVEABLE;
1199 return nfs4_do_call_sync(clnt, server, msg, args, res, task_flags);
c74dfe97
TM		 1200}
1201
1202
7c513058
BS		 1203int nfs4_call_sync(struct rpc_clnt *clnt,
1204 struct nfs_server *server,
e73b83f2
BS		 1205 struct rpc_message *msg,
1206 struct nfs4_sequence_args *args,
1207 struct nfs4_sequence_res *res,
1208 int cache_reply)
1209{
fba83f34 1210 nfs4_init_sequence(args, res, cache_reply, 0);
9915ea7e 1211 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
e73b83f2 1212}
cccef3b9 1213
3c591175
TM		 1214static void
1215nfs4_inc_nlink_locked(struct inode *inode)
1216{
82eae5a4
TM		 1217 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE |
1218 NFS_INO_INVALID_CTIME |
1219 NFS_INO_INVALID_NLINK);
3c591175
TM		 1220 inc_nlink(inode);
1221}
1222
1301e421
TM		 1223static void
1224nfs4_inc_nlink(struct inode *inode)
1225{
1226 spin_lock(&inode->i_lock);
1227 nfs4_inc_nlink_locked(inode);
1228 spin_unlock(&inode->i_lock);
1229}
1230
3c591175
TM		 1231static void
1232nfs4_dec_nlink_locked(struct inode *inode)
1233{
82eae5a4
TM		 1234 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE |
1235 NFS_INO_INVALID_CTIME |
1236 NFS_INO_INVALID_NLINK);
3c591175
TM		 1237 drop_nlink(inode);
1238}
1239
1240static void
1b523ca9
FL		 1241nfs4_update_changeattr_locked(struct inode *inode,
1242 struct nfs4_change_info *cinfo,
5636ec4e 1243 unsigned long timestamp, unsigned long cache_validity)
1da177e4 1244{
1b523ca9 1245 struct nfs_inode *nfsi = NFS_I(inode);
6f9be83d 1246 u64 change_attr = inode_peek_iversion_raw(inode);
1da177e4 1247
b6f80a2e 1248 cache_validity |= NFS_INO_INVALID_CTIME | NFS_INO_INVALID_MTIME;
20cf7d4e
TM		 1249 if (S_ISDIR(inode->i_mode))
1250 cache_validity |= NFS_INO_INVALID_DATA;
1b523ca9 1251
6f9be83d
TM		 1252 switch (NFS_SERVER(inode)->change_attr_type) {
1253 case NFS4_CHANGE_TYPE_IS_UNDEFINED:
20cf7d4e 1254 if (cinfo->after == change_attr)
6f9be83d
TM		 1255 goto out;
1256 break;
1257 default:
1258 if ((s64)(change_attr - cinfo->after) >= 0)
1259 goto out;
1260 }
1261
20cf7d4e
TM		 1262 inode_set_iversion_raw(inode, cinfo->after);
1263 if (!cinfo->atomic || cinfo->before != change_attr) {
1264 if (S_ISDIR(inode->i_mode))
1b523ca9 1265 nfs_force_lookup_revalidate(inode);
1b523ca9 1266
20cf7d4e
TM		 1267 if (!NFS_PROTO(inode)->have_delegation(inode, FMODE_READ))
1268 cache_validity |=
1269 NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL |
1270 NFS_INO_INVALID_SIZE | NFS_INO_INVALID_OTHER |
1271 NFS_INO_INVALID_BLOCKS | NFS_INO_INVALID_NLINK |
9d047bf6 1272 NFS_INO_INVALID_MODE | NFS_INO_INVALID_XATTR;
20cf7d4e 1273 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
e603a4c1 1274 }
20cf7d4e 1275 nfsi->attrtimeo_timestamp = jiffies;
d3129ef6 1276 nfsi->read_cache_jiffies = timestamp;
3235b403 1277 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
c8d07159 1278 nfsi->cache_validity &= ~NFS_INO_INVALID_CHANGE;
6f9be83d
TM		 1279out:
1280 nfs_set_cache_invalid(inode, cache_validity);
3c591175
TM		 1281}
1282
1b523ca9
FL		 1283void
1284nfs4_update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo,
5636ec4e 1285 unsigned long timestamp, unsigned long cache_validity)
3c591175
TM		 1286{
1287 spin_lock(&dir->i_lock);
1b523ca9 1288 nfs4_update_changeattr_locked(dir, cinfo, timestamp, cache_validity);
38478b24 1289 spin_unlock(&dir->i_lock);
1da177e4
LT		 1290}
1291
8fd1ab74
TM		 1292struct nfs4_open_createattrs {
1293 struct nfs4_label *label;
1294 struct iattr *sattr;
1295 const __u32 verf[2];
1296};
1297
49f9a0fa
TM		 1298static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
1299 int err, struct nfs4_exception *exception)
1300{
1301 if (err != -EINVAL)
1302 return false;
1303 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1304 return false;
1305 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
1306 exception->retry = 1;
1307 return true;
1308}
1309
1bf85d8c
TM		 1310static fmode_t _nfs4_ctx_to_accessmode(const struct nfs_open_context *ctx)
1311{
1312 return ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
1313}
1314
1315static fmode_t _nfs4_ctx_to_openmode(const struct nfs_open_context *ctx)
1316{
1317 fmode_t ret = ctx->mode & (FMODE_READ|FMODE_WRITE);
1318
1319 return (ctx->mode & FMODE_EXEC) ? FMODE_READ | ret : ret;
1320}
1321
6ae37339
TM		 1322static u32
1323nfs4_map_atomic_open_share(struct nfs_server *server,
1324 fmode_t fmode, int openflags)
1325{
1326 u32 res = 0;
1327
1328 switch (fmode & (FMODE_READ | FMODE_WRITE)) {
1329 case FMODE_READ:
1330 res = NFS4_SHARE_ACCESS_READ;
1331 break;
1332 case FMODE_WRITE:
1333 res = NFS4_SHARE_ACCESS_WRITE;
1334 break;
1335 case FMODE_READ|FMODE_WRITE:
1336 res = NFS4_SHARE_ACCESS_BOTH;
1337 }
1338 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1339 goto out;
1340 /* Want no delegation if we're using O_DIRECT */
1341 if (openflags & O_DIRECT)
1342 res |= NFS4_SHARE_WANT_NO_DELEG;
1343out:
1344 return res;
1345}
1346
49f9a0fa
TM		 1347static enum open_claim_type4
1348nfs4_map_atomic_open_claim(struct nfs_server *server,
1349 enum open_claim_type4 claim)
1350{
1351 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
1352 return claim;
1353 switch (claim) {
1354 default:
1355 return claim;
1356 case NFS4_OPEN_CLAIM_FH:
1357 return NFS4_OPEN_CLAIM_NULL;
1358 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1359 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
1360 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1361 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
1362 }
1363}
2ced46c2
TM		 1364
1365static void nfs4_init_opendata_res(struct nfs4_opendata *p)
1366{
1367 p->o_res.f_attr = &p->f_attr;
c1d51931
TM		 1368 p->o_res.seqid = p->o_arg.seqid;
1369 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 1370 p->o_res.server = p->o_arg.server;
5f657530 1371 p->o_res.access_request = p->o_arg.access;
2ced46c2 1372 nfs_fattr_init(&p->f_attr);
6926afd1 1373 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 1374}
1375
82a2c1b7 1376static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 1377 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8fd1ab74 1378 const struct nfs4_open_createattrs *c,
4a1c0893 1379 enum open_claim_type4 claim,
8535b2be 1380 gfp_t gfp_mask)
e56e0b78 1381{
82a2c1b7 1382 struct dentry *parent = dget_parent(dentry);
2b0143b5 1383 struct inode *dir = d_inode(parent);
e56e0b78 1384 struct nfs_server *server = NFS_SERVER(dir);
63f5f796 1385 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
8fd1ab74 1386 struct nfs4_label *label = (c != NULL) ? c->label : NULL;
e56e0b78
TM		 1387 struct nfs4_opendata *p;
1388
8535b2be 1389 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 1390 if (p == NULL)
1391 goto err;
14c43f76 1392
76baa2b2
AS		 1393 p->f_attr.label = nfs4_label_alloc(server, gfp_mask);
1394 if (IS_ERR(p->f_attr.label))
14c43f76
DQ		 1395 goto err_free_p;
1396
a49c2691
KM		 1397 p->a_label = nfs4_label_alloc(server, gfp_mask);
1398 if (IS_ERR(p->a_label))
1399 goto err_free_f;
1400
63f5f796
TM		 1401 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
1402 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask);
badc76dd 1403 if (IS_ERR(p->o_arg.seqid))
14c43f76 1404 goto err_free_label;
82a2c1b7
AV		 1405 nfs_sb_active(dentry->d_sb);
1406 p->dentry = dget(dentry);
e56e0b78
TM		 1407 p->dir = parent;
1408 p->owner = sp;
1409 atomic_inc(&sp->so_count);
dc0b027d
TM		 1410 p->o_arg.open_flags = flags;
1411 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
536585cc 1412 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
6ae37339
TM		 1413 p->o_arg.share_access = nfs4_map_atomic_open_share(server,
1414 fmode, flags);
90910519
BC		 1415 if (flags & O_CREAT) {
1416 p->o_arg.umask = current_umask();
1417 p->o_arg.label = nfs4_label_copy(p->a_label, label);
1418 if (c->sattr != NULL && c->sattr->ia_valid != 0) {
1419 p->o_arg.u.attrs = &p->attrs;
1420 memcpy(&p->attrs, c->sattr, sizeof(p->attrs));
1421
1422 memcpy(p->o_arg.u.verifier.data, c->verf,
1423 sizeof(p->o_arg.u.verifier.data));
1424 }
1425 }
a1e7f30a
TM		 1426 /* ask server to check for all possible rights as results
1427 * are cached */
1428 switch (p->o_arg.claim) {
1429 default:
1430 break;
1431 case NFS4_OPEN_CLAIM_NULL:
1432 case NFS4_OPEN_CLAIM_FH:
1433 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
1434 NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE |
84631f84
TM		 1435 NFS4_ACCESS_EXECUTE |
1436 nfs_access_xattr_mask(server);
ae2bb032 1437 }
7539bbab 1438 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 1439 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1440 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 1441 p->o_arg.name = &dentry->d_name;
e56e0b78 1442 p->o_arg.server = server;
aa9c2669 1443 p->o_arg.bitmask = nfs4_bitmask(server, label);
1549210f 1444 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
49f9a0fa 1445 switch (p->o_arg.claim) {
4a1c0893
TM		 1446 case NFS4_OPEN_CLAIM_NULL:
1447 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1448 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1449 p->o_arg.fh = NFS_FH(dir);
1450 break;
1451 case NFS4_OPEN_CLAIM_PREVIOUS:
1452 case NFS4_OPEN_CLAIM_FH:
1453 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1454 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
2b0143b5 1455 p->o_arg.fh = NFS_FH(d_inode(dentry));
4a1c0893 1456 }
cdd4e68b
TM		 1457 p->c_arg.fh = &p->o_res.fh;
1458 p->c_arg.stateid = &p->o_res.stateid;
1459 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 1460 nfs4_init_opendata_res(p);
c6d00e63 1461 kref_init(&p->kref);
e56e0b78 1462 return p;
14c43f76
DQ		 1463
1464err_free_label:
a49c2691
KM		 1465 nfs4_label_free(p->a_label);
1466err_free_f:
76baa2b2 1467 nfs4_label_free(p->f_attr.label);
14c43f76 1468err_free_p:
e56e0b78
TM		 1469 kfree(p);
1470err:
1471 dput(parent);
1472 return NULL;
1473}
1474
c6d00e63 1475static void nfs4_opendata_free(struct kref *kref)
e56e0b78 1476{
c6d00e63
TM		 1477 struct nfs4_opendata *p = container_of(kref,
1478 struct nfs4_opendata, kref);
82a2c1b7 1479 struct super_block *sb = p->dentry->d_sb;
c6d00e63 1480
30ae2412 1481 nfs4_lgopen_release(p->lgp);
c6d00e63 1482 nfs_free_seqid(p->o_arg.seqid);
2e80dbe7 1483 nfs4_sequence_free_slot(&p->o_res.seq_res);
aac00a8d
TM		 1484 if (p->state != NULL)
1485 nfs4_put_open_state(p->state);
c6d00e63 1486 nfs4_put_state_owner(p->owner);
14c43f76 1487
a49c2691 1488 nfs4_label_free(p->a_label);
76baa2b2 1489 nfs4_label_free(p->f_attr.label);
14c43f76 1490
c6d00e63 1491 dput(p->dir);
82a2c1b7
AV		 1492 dput(p->dentry);
1493 nfs_sb_deactive(sb);
6926afd1 1494 nfs_fattr_free_names(&p->f_attr);
e911b815 1495 kfree(p->f_attr.mdsthreshold);
c6d00e63
TM		 1496 kfree(p);
1497}
1498
1499static void nfs4_opendata_put(struct nfs4_opendata *p)
1500{
1501 if (p != NULL)
1502 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 1503}
1504
24311f88
TM		 1505static bool nfs4_mode_match_open_stateid(struct nfs4_state *state,
1506 fmode_t fmode)
1507{
1508 switch(fmode & (FMODE_READ|FMODE_WRITE)) {
1509 case FMODE_READ|FMODE_WRITE:
1510 return state->n_rdwr != 0;
1511 case FMODE_WRITE:
1512 return state->n_wronly != 0;
1513 case FMODE_READ:
1514 return state->n_rdonly != 0;
1515 }
1516 WARN_ON_ONCE(1);
1517 return false;
1518}
1519
be189f7e
TM		 1520static int can_open_cached(struct nfs4_state *state, fmode_t mode,
1521 int open_mode, enum open_claim_type4 claim)
6ee41268
TM		 1522{
1523 int ret = 0;
dc0b027d 1524
536e43d1 1525 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d 1526 goto out;
be189f7e
TM		 1527 switch (claim) {
1528 case NFS4_OPEN_CLAIM_NULL:
1529 case NFS4_OPEN_CLAIM_FH:
1530 goto out;
1531 default:
1532 break;
1533 }
dc0b027d 1534 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 1535 case FMODE_READ:
88069f77
TM		 1536 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1537 && state->n_rdonly != 0;
6ee41268
TM		 1538 break;
1539 case FMODE_WRITE:
88069f77
TM		 1540 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1541 && state->n_wronly != 0;
6ee41268
TM		 1542 break;
1543 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 1544 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1545 && state->n_rdwr != 0;
6ee41268 1546 }
dc0b027d 1547out:
6ee41268
TM		 1548 return ret;
1549}
1550
2a606188
TM		 1551static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode,
1552 enum open_claim_type4 claim)
aac00a8d 1553{
652f89f6
TM		 1554 if (delegation == NULL)
1555 return 0;
dc0b027d 1556 if ((delegation->type & fmode) != fmode)
aac00a8d 1557 return 0;
2a606188
TM		 1558 switch (claim) {
1559 case NFS4_OPEN_CLAIM_NULL:
1560 case NFS4_OPEN_CLAIM_FH:
1561 break;
1562 case NFS4_OPEN_CLAIM_PREVIOUS:
1563 if (!test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
1564 break;
df561f66 1565 fallthrough;
2a606188
TM		 1566 default:
1567 return 0;
1568 }
b7391f44 1569 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 1570 return 1;
1571}
1572
dc0b027d 1573static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 1574{
dc0b027d 1575 switch (fmode) {
e7616923
TM		 1576 case FMODE_WRITE:
1577 state->n_wronly++;
1578 break;
1579 case FMODE_READ:
1580 state->n_rdonly++;
1581 break;
1582 case FMODE_READ|FMODE_WRITE:
1583 state->n_rdwr++;
1584 }
dc0b027d 1585 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 1586}
1587
8a64c4ef
TM		 1588#ifdef CONFIG_NFS_V4_1
1589static bool nfs_open_stateid_recover_openmode(struct nfs4_state *state)
1590{
1591 if (state->n_rdonly && !test_bit(NFS_O_RDONLY_STATE, &state->flags))
1592 return true;
1593 if (state->n_wronly && !test_bit(NFS_O_WRONLY_STATE, &state->flags))
1594 return true;
1595 if (state->n_rdwr && !test_bit(NFS_O_RDWR_STATE, &state->flags))
1596 return true;
1597 return false;
1598}
1599#endif /* CONFIG_NFS_V4_1 */
1600
c9399f21
TM		 1601static void nfs_state_log_update_open_stateid(struct nfs4_state *state)
1602{
1603 if (test_and_clear_bit(NFS_STATE_CHANGE_WAIT, &state->flags))
1604 wake_up_all(&state->waitq);
1605}
1606
4f14c194
TM		 1607static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
1608{
1609 struct nfs_client *clp = state->owner->so_server->nfs_client;
1610 bool need_recover = false;
1611
1612 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly)
1613 need_recover = true;
1614 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly)
1615 need_recover = true;
1616 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr)
1617 need_recover = true;
1618 if (need_recover)
1619 nfs4_state_mark_reclaim_nograce(clp, state);
1620}
1621
c9399f21
TM		 1622/*
1623 * Check for whether or not the caller may update the open stateid
1624 * to the value passed in by stateid.
1625 *
1626 * Note: This function relies heavily on the server implementing
1627 * RFC7530 Section 9.1.4.2, and RFC5661 Section 8.2.2
1628 * correctly.
1629 * i.e. The stateid seqids have to be initialised to 1, and
1630 * are then incremented on every state transition.
1631 */
b4868b44 1632static bool nfs_stateid_is_sequential(struct nfs4_state *state,
c9399f21 1633 const nfs4_stateid *stateid)
e999e80e 1634{
b4868b44
BC		 1635 if (test_bit(NFS_OPEN_STATE, &state->flags)) {
1636 /* The common case - we're updating to a new sequence number */
01d29f87
TM		 1637 if (nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1638 if (nfs4_stateid_is_next(&state->open_stateid, stateid))
1639 return true;
1640 return false;
b4868b44 1641 }
01d29f87 1642 /* The server returned a new stateid */
c9399f21 1643 }
01d29f87
TM		 1644 /* This is the first OPEN in this generation */
1645 if (stateid->seqid == cpu_to_be32(1))
1646 return true;
e999e80e
TM		 1647 return false;
1648}
1649
f95549cf
TM		 1650static void nfs_resync_open_stateid_locked(struct nfs4_state *state)
1651{
3c38cbe2
TM		 1652 if (!(state->n_wronly || state->n_rdonly || state->n_rdwr))
1653 return;
f95549cf
TM		 1654 if (state->n_wronly)
1655 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1656 if (state->n_rdonly)
1657 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1658 if (state->n_rdwr)
1659 set_bit(NFS_O_RDWR_STATE, &state->flags);
3c38cbe2 1660 set_bit(NFS_OPEN_STATE, &state->flags);
f95549cf
TM		 1661}
1662
226056c5
TM		 1663static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
1664 nfs4_stateid *stateid, fmode_t fmode)
003707c7 1665{
226056c5
TM		 1666 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1667 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1668 case FMODE_WRITE:
1669 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1670 break;
1671 case FMODE_READ:
1672 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1673 break;
1674 case 0:
1675 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1676 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1677 clear_bit(NFS_OPEN_STATE, &state->flags);
1678 }
1679 if (stateid == NULL)
1680 return;
3e7dfb16
TM		 1681 /* Handle OPEN+OPEN_DOWNGRADE races */
1682 if (nfs4_stateid_match_other(stateid, &state->open_stateid) &&
1683 !nfs4_stateid_is_newer(stateid, &state->open_stateid)) {
f95549cf 1684 nfs_resync_open_stateid_locked(state);
c9399f21 1685 goto out;
f95549cf 1686 }
003707c7 1687 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 1688 nfs4_stateid_copy(&state->stateid, stateid);
1689 nfs4_stateid_copy(&state->open_stateid, stateid);
ad9e02dc 1690 trace_nfs4_open_stateid_update(state->inode, stateid, 0);
c9399f21
TM		 1691out:
1692 nfs_state_log_update_open_stateid(state);
226056c5
TM		 1693}
1694
4a1e2feb
TM		 1695static void nfs_clear_open_stateid(struct nfs4_state *state,
1696 nfs4_stateid *arg_stateid,
1697 nfs4_stateid *stateid, fmode_t fmode)
226056c5
TM		 1698{
1699 write_seqlock(&state->seqlock);
3e7dfb16
TM		 1700 /* Ignore, if the CLOSE argment doesn't match the current stateid */
1701 if (nfs4_state_match_open_stateid_other(state, arg_stateid))
1702 nfs_clear_open_stateid_locked(state, stateid, fmode);
226056c5 1703 write_sequnlock(&state->seqlock);
4f14c194
TM		 1704 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1705 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
226056c5
TM		 1706}
1707
1393d961 1708static void nfs_set_open_stateid_locked(struct nfs4_state *state,
c9399f21 1709 const nfs4_stateid *stateid, nfs4_stateid *freeme)
e9acf210
TM		 1710 __must_hold(&state->owner->so_lock)
1711 __must_hold(&state->seqlock)
1712 __must_hold(RCU)
1713
003707c7 1714{
c9399f21
TM		 1715 DEFINE_WAIT(wait);
1716 int status = 0;
1717 for (;;) {
1718
b4868b44 1719 if (nfs_stateid_is_sequential(state, stateid))
003707c7 1720 break;
b4868b44 1721
c9399f21 1722 if (status)
003707c7 1723 break;
c9399f21
TM		 1724 /* Rely on seqids for serialisation with NFSv4.0 */
1725 if (!nfs4_has_session(NFS_SERVER(state->inode)->nfs_client))
1726 break;
1727
b4868b44 1728 set_bit(NFS_STATE_CHANGE_WAIT, &state->flags);
c9399f21
TM		 1729 prepare_to_wait(&state->waitq, &wait, TASK_KILLABLE);
1730 /*
1731 * Ensure we process the state changes in the same order
1732 * in which the server processed them by delaying the
1733 * update of the stateid until we are in sequence.
1734 */
1735 write_sequnlock(&state->seqlock);
1736 spin_unlock(&state->owner->so_lock);
1737 rcu_read_unlock();
ad9e02dc 1738 trace_nfs4_open_stateid_update_wait(state->inode, stateid, 0);
b4868b44 1739
bb002388 1740 if (!fatal_signal_pending(current)) {
c9399f21
TM		 1741 if (schedule_timeout(5*HZ) == 0)
1742 status = -EAGAIN;
1743 else
1744 status = 0;
1745 } else
1746 status = -EINTR;
1747 finish_wait(&state->waitq, &wait);
1748 rcu_read_lock();
1749 spin_lock(&state->owner->so_lock);
1750 write_seqlock(&state->seqlock);
003707c7 1751 }
c9399f21 1752
e1fff5df
TM		 1753 if (test_bit(NFS_OPEN_STATE, &state->flags) &&
1754 !nfs4_stateid_match_other(stateid, &state->open_stateid)) {
c9399f21
TM		 1755 nfs4_stateid_copy(freeme, &state->open_stateid);
1756 nfs_test_and_clear_all_open_stateid(state);
1757 }
1758
e999e80e
TM		 1759 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1760 nfs4_stateid_copy(&state->stateid, stateid);
1761 nfs4_stateid_copy(&state->open_stateid, stateid);
ad9e02dc 1762 trace_nfs4_open_stateid_update(state->inode, stateid, status);
c9399f21 1763 nfs_state_log_update_open_stateid(state);
003707c7
TM		 1764}
1765
c9399f21 1766static void nfs_state_set_open_stateid(struct nfs4_state *state,
1393d961 1767 const nfs4_stateid *open_stateid,
1393d961
TM		 1768 fmode_t fmode,
1769 nfs4_stateid *freeme)
1da177e4 1770{
8bda4e4c
TM		 1771 /*
1772 * Protect the call to nfs4_state_set_mode_locked and
1773 * serialise the stateid update
1774 */
1775 write_seqlock(&state->seqlock);
c9399f21
TM		 1776 nfs_set_open_stateid_locked(state, open_stateid, freeme);
1777 switch (fmode) {
1778 case FMODE_READ:
1779 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1780 break;
1781 case FMODE_WRITE:
1782 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1783 break;
1784 case FMODE_READ|FMODE_WRITE:
1785 set_bit(NFS_O_RDWR_STATE, &state->flags);
003707c7 1786 }
c9399f21
TM		 1787 set_bit(NFS_OPEN_STATE, &state->flags);
1788 write_sequnlock(&state->seqlock);
1789}
1790
27a30cf6
TM		 1791static void nfs_state_clear_open_state_flags(struct nfs4_state *state)
1792{
1793 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1794 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1795 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1796 clear_bit(NFS_OPEN_STATE, &state->flags);
1797}
1798
c9399f21
TM		 1799static void nfs_state_set_delegation(struct nfs4_state *state,
1800 const nfs4_stateid *deleg_stateid,
1801 fmode_t fmode)
1802{
1803 /*
1804 * Protect the call to nfs4_state_set_mode_locked and
1805 * serialise the stateid update
1806 */
1807 write_seqlock(&state->seqlock);
1808 nfs4_stateid_copy(&state->stateid, deleg_stateid);
1809 set_bit(NFS_DELEGATED_STATE, &state->flags);
8bda4e4c 1810 write_sequnlock(&state->seqlock);
1da177e4
LT		 1811}
1812
9f0c5124
TM		 1813static void nfs_state_clear_delegation(struct nfs4_state *state)
1814{
1815 write_seqlock(&state->seqlock);
1816 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1817 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1818 write_sequnlock(&state->seqlock);
1819}
1820
ec4b0925 1821int update_open_stateid(struct nfs4_state *state,
1393d961
TM		 1822 const nfs4_stateid *open_stateid,
1823 const nfs4_stateid *delegation,
1824 fmode_t fmode)
34310430 1825{
1393d961
TM		 1826 struct nfs_server *server = NFS_SERVER(state->inode);
1827 struct nfs_client *clp = server->nfs_client;
34310430
TM		 1828 struct nfs_inode *nfsi = NFS_I(state->inode);
1829 struct nfs_delegation *deleg_cur;
83aa3e0f 1830 nfs4_stateid freeme = { };
34310430
TM		 1831 int ret = 0;
1832
dc0b027d 1833 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1834
1835 rcu_read_lock();
c9399f21
TM		 1836 spin_lock(&state->owner->so_lock);
1837 if (open_stateid != NULL) {
1838 nfs_state_set_open_stateid(state, open_stateid, fmode, &freeme);
1839 ret = 1;
1840 }
1841
333ac786 1842 deleg_cur = nfs4_get_valid_delegation(state->inode);
34310430
TM		 1843 if (deleg_cur == NULL)
1844 goto no_delegation;
1845
1846 spin_lock(&deleg_cur->lock);
17f26b12 1847 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
d25be546 1848 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1849 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1850 goto no_delegation_unlock;
1851
1852 if (delegation == NULL)
1853 delegation = &deleg_cur->stateid;
333ac786 1854 else if (!nfs4_stateid_match_other(&deleg_cur->stateid, delegation))
34310430
TM		 1855 goto no_delegation_unlock;
1856
b7391f44 1857 nfs_mark_delegation_referenced(deleg_cur);
c9399f21 1858 nfs_state_set_delegation(state, &deleg_cur->stateid, fmode);
34310430
TM		 1859 ret = 1;
1860no_delegation_unlock:
1861 spin_unlock(&deleg_cur->lock);
1862no_delegation:
c9399f21
TM		 1863 if (ret)
1864 update_open_stateflags(state, fmode);
1865 spin_unlock(&state->owner->so_lock);
34310430
TM		 1866 rcu_read_unlock();
1867
4f14c194 1868 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1393d961
TM		 1869 nfs4_schedule_state_manager(clp);
1870 if (freeme.type != 0)
1871 nfs4_test_and_free_stateid(server, &freeme,
1872 state->owner->so_cred);
34310430
TM		 1873
1874 return ret;
1875}
1876
39071e6f
TM		 1877static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp,
1878 const nfs4_stateid *stateid)
1879{
1880 struct nfs4_state *state = lsp->ls_state;
1881 bool ret = false;
1882
1883 spin_lock(&state->state_lock);
1884 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid))
1885 goto out_noupdate;
1886 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid))
1887 goto out_noupdate;
1888 nfs4_stateid_copy(&lsp->ls_stateid, stateid);
1889 ret = true;
1890out_noupdate:
1891 spin_unlock(&state->state_lock);
1892 return ret;
1893}
34310430 1894
dc0b027d 1895static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1896{
1897 struct nfs_delegation *delegation;
1898
f5086242 1899 fmode &= FMODE_READ|FMODE_WRITE;
aac00a8d 1900 rcu_read_lock();
40e6aa10 1901 delegation = nfs4_get_valid_delegation(inode);
dc0b027d 1902 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1903 rcu_read_unlock();
1904 return;
1905 }
1906 rcu_read_unlock();
57ec14c5 1907 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1908}
1909
6ee41268 1910static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1911{
1912 struct nfs4_state *state = opendata->state;
aac00a8d 1913 struct nfs_delegation *delegation;
f448badd 1914 int open_mode = opendata->o_arg.open_flags;
dc0b027d 1915 fmode_t fmode = opendata->o_arg.fmode;
2a606188 1916 enum open_claim_type4 claim = opendata->o_arg.claim;
aac00a8d
TM		 1917 nfs4_stateid stateid;
1918 int ret = -EAGAIN;
1919
aac00a8d 1920 for (;;) {
61beef75 1921 spin_lock(&state->owner->so_lock);
be189f7e 1922 if (can_open_cached(state, fmode, open_mode, claim)) {
61beef75 1923 update_open_stateflags(state, fmode);
6ee41268 1924 spin_unlock(&state->owner->so_lock);
61beef75 1925 goto out_return_state;
6ee41268 1926 }
61beef75 1927 spin_unlock(&state->owner->so_lock);
34310430 1928 rcu_read_lock();
be3df3dd 1929 delegation = nfs4_get_valid_delegation(state->inode);
2a606188 1930 if (!can_open_delegated(delegation, fmode, claim)) {
34310430 1931 rcu_read_unlock();
aac00a8d 1932 break;
34310430 1933 }
aac00a8d 1934 /* Save the delegation */
f597c537 1935 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1936 rcu_read_unlock();
fa332941 1937 nfs_release_seqid(opendata->o_arg.seqid);
bdeca1b7
TM		 1938 if (!opendata->is_recover) {
1939 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1940 if (ret != 0)
1941 goto out;
1942 }
aac00a8d 1943 ret = -EAGAIN;
34310430
TM		 1944
1945 /* Try to update the stateid using the delegation */
dc0b027d 1946 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1947 goto out_return_state;
aac00a8d 1948 }
aac00a8d
TM		 1949out:
1950 return ERR_PTR(ret);
1951out_return_state:
ace9fad4 1952 refcount_inc(&state->count);
aac00a8d
TM		 1953 return state;
1954}
1955
e23008ec
AA		 1956static void
1957nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1958{
1959 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1960 struct nfs_delegation *delegation;
1961 int delegation_flags = 0;
1962
1963 rcu_read_lock();
1964 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1965 if (delegation)
1966 delegation_flags = delegation->flags;
1967 rcu_read_unlock();
72d79ff8
TM		 1968 switch (data->o_arg.claim) {
1969 default:
1970 break;
1971 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1972 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
e23008ec
AA		 1973 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1974 "returning a delegation for "
1975 "OPEN(CLAIM_DELEGATE_CUR)\n",
1976 clp->cl_hostname);
72d79ff8
TM		 1977 return;
1978 }
1979 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
e23008ec 1980 nfs_inode_set_delegation(state->inode,
35156bff
TM		 1981 data->owner->so_cred,
1982 data->o_res.delegation_type,
1983 &data->o_res.delegation,
1984 data->o_res.pagemod_limit);
e23008ec
AA		 1985 else
1986 nfs_inode_reclaim_delegation(state->inode,
35156bff
TM		 1987 data->owner->so_cred,
1988 data->o_res.delegation_type,
1989 &data->o_res.delegation,
1990 data->o_res.pagemod_limit);
8b199e58
JL		 1991
1992 if (data->o_res.do_recall)
1993 nfs_async_inode_return_delegation(state->inode,
1994 &data->o_res.delegation);
e23008ec
AA		 1995}
1996
1997/*
1998 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1999 * and update the nfs4_state.
2000 */
2001static struct nfs4_state *
2002_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
2003{
2004 struct inode *inode = data->state->inode;
2005 struct nfs4_state *state = data->state;
2006 int ret;
2007
d2bfda2e 2008 if (!data->rpc_done) {
37a8484a
AS		 2009 if (data->rpc_status)
2010 return ERR_PTR(data->rpc_status);
6165a16a 2011 return nfs4_try_open_cached(data);
e23008ec
AA		 2012 }
2013
e23008ec
AA		 2014 ret = nfs_refresh_inode(inode, &data->f_attr);
2015 if (ret)
37a8484a 2016 return ERR_PTR(ret);
e23008ec
AA		 2017
2018 if (data->o_res.delegation_type != 0)
2019 nfs4_opendata_check_deleg(data, state);
6165a16a 2020
e3c8dc76
TM		 2021 if (!update_open_stateid(state, &data->o_res.stateid,
2022 NULL, data->o_arg.fmode))
2023 return ERR_PTR(-EAGAIN);
ace9fad4 2024 refcount_inc(&state->count);
e23008ec
AA		 2025
2026 return state;
e23008ec
AA		 2027}
2028
4e2fcac7
TM		 2029static struct inode *
2030nfs4_opendata_get_inode(struct nfs4_opendata *data)
2031{
2032 struct inode *inode;
2033
2034 switch (data->o_arg.claim) {
2035 case NFS4_OPEN_CLAIM_NULL:
2036 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
2037 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
2038 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
2039 return ERR_PTR(-EAGAIN);
2040 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh,
cf7ab00a 2041 &data->f_attr);
4e2fcac7
TM		 2042 break;
2043 default:
2044 inode = d_inode(data->dentry);
2045 ihold(inode);
2046 nfs_refresh_inode(inode, &data->f_attr);
2047 }
2048 return inode;
2049}
2050
e23008ec 2051static struct nfs4_state *
75e8c48b 2052nfs4_opendata_find_nfs4_state(struct nfs4_opendata *data)
24ac23ab 2053{
75e8c48b 2054 struct nfs4_state *state;
24ac23ab 2055 struct inode *inode;
75e8c48b
TM		 2056
2057 inode = nfs4_opendata_get_inode(data);
2058 if (IS_ERR(inode))
2059 return ERR_CAST(inode);
2060 if (data->state != NULL && data->state->inode == inode) {
2061 state = data->state;
ace9fad4 2062 refcount_inc(&state->count);
75e8c48b
TM		 2063 } else
2064 state = nfs4_get_open_state(inode, data->owner);
2065 iput(inode);
2066 if (state == NULL)
2067 state = ERR_PTR(-ENOMEM);
2068 return state;
2069}
2070
2071static struct nfs4_state *
2072_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
2073{
2074 struct nfs4_state *state;
24ac23ab 2075
aac00a8d 2076 if (!data->rpc_done) {
6ee41268 2077 state = nfs4_try_open_cached(data);
9759b0fb 2078 trace_nfs4_cached_open(data->state);
aac00a8d
TM		 2079 goto out;
2080 }
2081
75e8c48b
TM		 2082 state = nfs4_opendata_find_nfs4_state(data);
2083 if (IS_ERR(state))
2084 goto out;
2085
e23008ec
AA		 2086 if (data->o_res.delegation_type != 0)
2087 nfs4_opendata_check_deleg(data, state);
e3c8dc76
TM		 2088 if (!update_open_stateid(state, &data->o_res.stateid,
2089 NULL, data->o_arg.fmode)) {
2090 nfs4_put_open_state(state);
2091 state = ERR_PTR(-EAGAIN);
2092 }
aac00a8d 2093out:
7aa262b5 2094 nfs_release_seqid(data->o_arg.seqid);
24ac23ab
TM		 2095 return state;
2096}
2097
e23008ec
AA		 2098static struct nfs4_state *
2099nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
2100{
2e80dbe7
TM		 2101 struct nfs4_state *ret;
2102
e23008ec 2103 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
2e80dbe7
TM		 2104 ret =_nfs4_opendata_reclaim_to_nfs4_state(data);
2105 else
2106 ret = _nfs4_opendata_to_nfs4_state(data);
2107 nfs4_sequence_free_slot(&data->o_res.seq_res);
2108 return ret;
e23008ec
AA		 2109}
2110
0de43976
TM		 2111static struct nfs_open_context *
2112nfs4_state_find_open_context_mode(struct nfs4_state *state, fmode_t mode)
864472e9
TM		 2113{
2114 struct nfs_inode *nfsi = NFS_I(state->inode);
2115 struct nfs_open_context *ctx;
2116
0de43976
TM		 2117 rcu_read_lock();
2118 list_for_each_entry_rcu(ctx, &nfsi->open_files, list) {
864472e9
TM		 2119 if (ctx->state != state)
2120 continue;
0de43976
TM		 2121 if ((ctx->mode & mode) != mode)
2122 continue;
2123 if (!get_nfs_open_context(ctx))
2124 continue;
2125 rcu_read_unlock();
864472e9
TM		 2126 return ctx;
2127 }
0de43976 2128 rcu_read_unlock();
864472e9
TM		 2129 return ERR_PTR(-ENOENT);
2130}
2131
0de43976
TM		 2132static struct nfs_open_context *
2133nfs4_state_find_open_context(struct nfs4_state *state)
2134{
2135 struct nfs_open_context *ctx;
2136
2137 ctx = nfs4_state_find_open_context_mode(state, FMODE_READ|FMODE_WRITE);
2138 if (!IS_ERR(ctx))
2139 return ctx;
2140 ctx = nfs4_state_find_open_context_mode(state, FMODE_WRITE);
2141 if (!IS_ERR(ctx))
2142 return ctx;
2143 return nfs4_state_find_open_context_mode(state, FMODE_READ);
2144}
2145
4a1c0893
TM		 2146static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
2147 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 2148{
2149 struct nfs4_opendata *opendata;
2150
4a1c0893 2151 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
8fd1ab74 2152 NULL, claim, GFP_NOFS);
6f220ed5
TM		 2153 if (opendata == NULL)
2154 return ERR_PTR(-ENOMEM);
2155 opendata->state = state;
ace9fad4 2156 refcount_inc(&state->count);
6f220ed5
TM		 2157 return opendata;
2158}
2159
24311f88 2160static int nfs4_open_recover_helper(struct nfs4_opendata *opendata,
51069e4a 2161 fmode_t fmode)
864472e9 2162{
2ced46c2 2163 struct nfs4_state *newstate;
51069e4a
TM		 2164 struct nfs_server *server = NFS_SB(opendata->dentry->d_sb);
2165 int openflags = opendata->o_arg.open_flags;
864472e9
TM		 2166 int ret;
2167
24311f88 2168 if (!nfs4_mode_match_open_stateid(opendata->state, fmode))
39f897fd 2169 return 0;
dc0b027d 2170 opendata->o_arg.fmode = fmode;
51069e4a
TM		 2171 opendata->o_arg.share_access =
2172 nfs4_map_atomic_open_share(server, fmode, openflags);
2ced46c2
TM		 2173 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
2174 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
2175 nfs4_init_opendata_res(opendata);
b257957e 2176 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 2177 if (ret != 0)
2178 return ret;
2ced46c2 2179 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 2180 if (IS_ERR(newstate))
2181 return PTR_ERR(newstate);
24311f88
TM		 2182 if (newstate != opendata->state)
2183 ret = -ESTALE;
643168c2 2184 nfs4_close_state(newstate, fmode);
24311f88 2185 return ret;
864472e9
TM		 2186}
2187
2188static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
2189{
864472e9
TM		 2190 int ret;
2191
2192 /* memory barrier prior to reading state->n_* */
2193 smp_rmb();
24311f88
TM		 2194 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
2195 if (ret != 0)
2196 return ret;
2197 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE);
2198 if (ret != 0)
2199 return ret;
2200 ret = nfs4_open_recover_helper(opendata, FMODE_READ);
2201 if (ret != 0)
2202 return ret;
1ac7e2fd
TM		 2203 /*
2204 * We may have performed cached opens for all three recoveries.
2205 * Check if we need to update the current stateid.
2206 */
2207 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 2208 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 2209 write_seqlock(&state->seqlock);
1ac7e2fd 2210 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 2211 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 2212 write_sequnlock(&state->seqlock);
1ac7e2fd 2213 }
864472e9
TM		 2214 return 0;
2215}
2216
1da177e4
LT		 2217/*
2218 * OPEN_RECLAIM:
2219 * reclaim state on the server after a reboot.
1da177e4 2220 */
539cd03a 2221static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 2222{
1ac7e2fd 2223 struct nfs_delegation *delegation;
864472e9 2224 struct nfs4_opendata *opendata;
dc0b027d 2225 fmode_t delegation_type = 0;
1da177e4
LT		 2226 int status;
2227
4a1c0893
TM		 2228 opendata = nfs4_open_recoverdata_alloc(ctx, state,
2229 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 2230 if (IS_ERR(opendata))
2231 return PTR_ERR(opendata);
1ac7e2fd
TM		 2232 rcu_read_lock();
2233 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 2234 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 2235 delegation_type = delegation->type;
1ac7e2fd 2236 rcu_read_unlock();
864472e9
TM		 2237 opendata->o_arg.u.delegation_type = delegation_type;
2238 status = nfs4_open_recover(opendata, state);
c6d00e63 2239 nfs4_opendata_put(opendata);
1da177e4
LT		 2240 return status;
2241}
2242
539cd03a 2243static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 2244{
2245 struct nfs_server *server = NFS_SERVER(state->inode);
2246 struct nfs4_exception exception = { };
2247 int err;
2248 do {
539cd03a 2249 err = _nfs4_do_open_reclaim(ctx, state);
42113a75 2250 trace_nfs4_open_reclaim(ctx, 0, err);
49f9a0fa
TM		 2251 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2252 continue;
168667c4 2253 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 2254 break;
2255 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 2256 } while (exception.retry);
2257 return err;
2258}
2259
864472e9
TM		 2260static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
2261{
2262 struct nfs_open_context *ctx;
2263 int ret;
2264
2265 ctx = nfs4_state_find_open_context(state);
2266 if (IS_ERR(ctx))
91876b13 2267 return -EAGAIN;
27a30cf6
TM		 2268 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2269 nfs_state_clear_open_state_flags(state);
539cd03a 2270 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 2271 put_nfs_open_context(ctx);
2272 return ret;
2273}
2274
dce2630c 2275static 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 2276{
be76b5b6
TM		 2277 switch (err) {
2278 default:
2279 printk(KERN_ERR "NFS: %s: unhandled error "
2280 "%d.\n", __func__, err);
ffb81717 2281 fallthrough;
be76b5b6
TM		 2282 case 0:
2283 case -ENOENT:
8eee52af 2284 case -EAGAIN:
be76b5b6 2285 case -ESTALE:
67e7b52d 2286 case -ETIMEDOUT:
be76b5b6
TM		 2287 break;
2288 case -NFS4ERR_BADSESSION:
2289 case -NFS4ERR_BADSLOT:
2290 case -NFS4ERR_BAD_HIGH_SLOT:
2291 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
2292 case -NFS4ERR_DEADSESSION:
be76b5b6
TM		 2293 return -EAGAIN;
2294 case -NFS4ERR_STALE_CLIENTID:
2295 case -NFS4ERR_STALE_STATEID:
be76b5b6
TM		 2296 /* Don't recall a delegation if it was lost */
2297 nfs4_schedule_lease_recovery(server->nfs_client);
2298 return -EAGAIN;
352297b9
CL		 2299 case -NFS4ERR_MOVED:
2300 nfs4_schedule_migration_recovery(server);
2301 return -EAGAIN;
8ef2f8d4
CL		 2302 case -NFS4ERR_LEASE_MOVED:
2303 nfs4_schedule_lease_moved_recovery(server->nfs_client);
2304 return -EAGAIN;
be76b5b6
TM		 2305 case -NFS4ERR_DELEG_REVOKED:
2306 case -NFS4ERR_ADMIN_REVOKED:
404ea356 2307 case -NFS4ERR_EXPIRED:
be76b5b6 2308 case -NFS4ERR_BAD_STATEID:
db4f2e63 2309 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 2310 nfs_inode_find_state_and_recover(state->inode,
2311 stateid);
2312 nfs4_schedule_stateid_recovery(server, state);
869f9dfa 2313 return -EAGAIN;
be76b5b6
TM		 2314 case -NFS4ERR_DELAY:
2315 case -NFS4ERR_GRACE:
be76b5b6
TM		 2316 ssleep(1);
2317 return -EAGAIN;
db4f2e63
TM		 2318 case -ENOMEM:
2319 case -NFS4ERR_DENIED:
dce2630c
N		 2320 if (fl) {
2321 struct nfs4_lock_state *lsp = fl->fl_u.nfs4_fl.owner;
2322 if (lsp)
2323 set_bit(NFS_LOCK_LOST, &lsp->ls_flags);
2324 }
db4f2e63 2325 return 0;
be76b5b6 2326 }
1da177e4
LT		 2327 return err;
2328}
2329
24311f88 2330int nfs4_open_delegation_recall(struct nfs_open_context *ctx,
5eb8d18c 2331 struct nfs4_state *state, const nfs4_stateid *stateid)
db4f2e63
TM		 2332{
2333 struct nfs_server *server = NFS_SERVER(state->inode);
2334 struct nfs4_opendata *opendata;
24311f88 2335 int err = 0;
db4f2e63
TM		 2336
2337 opendata = nfs4_open_recoverdata_alloc(ctx, state,
2338 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
2339 if (IS_ERR(opendata))
2340 return PTR_ERR(opendata);
2341 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
5eb8d18c 2342 if (!test_bit(NFS_O_RDWR_STATE, &state->flags)) {
24311f88
TM		 2343 err = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
2344 if (err)
5eb8d18c
TM		 2345 goto out;
2346 }
2347 if (!test_bit(NFS_O_WRONLY_STATE, &state->flags)) {
24311f88
TM		 2348 err = nfs4_open_recover_helper(opendata, FMODE_WRITE);
2349 if (err)
5eb8d18c
TM		 2350 goto out;
2351 }
2352 if (!test_bit(NFS_O_RDONLY_STATE, &state->flags)) {
24311f88 2353 err = nfs4_open_recover_helper(opendata, FMODE_READ);
5eb8d18c
TM		 2354 if (err)
2355 goto out;
24311f88 2356 }
5eb8d18c
TM		 2357 nfs_state_clear_delegation(state);
2358out:
db4f2e63 2359 nfs4_opendata_put(opendata);
dce2630c 2360 return nfs4_handle_delegation_recall_error(server, state, stateid, NULL, err);
db4f2e63
TM		 2361}
2362
be05c860
CL		 2363static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
2364{
2365 struct nfs4_opendata *data = calldata;
2366
7981c8a6
AS		 2367 nfs4_setup_sequence(data->o_arg.server->nfs_client,
2368 &data->c_arg.seq_args, &data->c_res.seq_res, task);
be05c860
CL		 2369}
2370
cdd4e68b
TM		 2371static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
2372{
2373 struct nfs4_opendata *data = calldata;
2374
17ead6c8 2375 nfs40_sequence_done(task, &data->c_res.seq_res);
be05c860 2376
cdd4e68b 2377 data->rpc_status = task->tk_status;
26e976a8 2378 if (data->rpc_status == 0) {
f597c537 2379 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 2380 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 2381 renew_lease(data->o_res.server, data->timestamp);
a7a3b1e9 2382 data->rpc_done = true;
26e976a8 2383 }
cdd4e68b
TM		 2384}
2385
2386static void nfs4_open_confirm_release(void *calldata)
2387{
2388 struct nfs4_opendata *data = calldata;
2389 struct nfs4_state *state = NULL;
2390
2391 /* If this request hasn't been cancelled, do nothing */
a7a3b1e9 2392 if (!data->cancelled)
cdd4e68b
TM		 2393 goto out_free;
2394 /* In case of error, no cleanup! */
3e309914 2395 if (!data->rpc_done)
cdd4e68b 2396 goto out_free;
cdd4e68b 2397 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 2398 if (!IS_ERR(state))
643168c2 2399 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 2400out_free:
c6d00e63 2401 nfs4_opendata_put(data);
cdd4e68b
TM		 2402}
2403
2404static const struct rpc_call_ops nfs4_open_confirm_ops = {
be05c860 2405 .rpc_call_prepare = nfs4_open_confirm_prepare,
cdd4e68b
TM		 2406 .rpc_call_done = nfs4_open_confirm_done,
2407 .rpc_release = nfs4_open_confirm_release,
2408};
2409
2410/*
2411 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
2412 */
2413static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
2414{
2b0143b5 2415 struct nfs_server *server = NFS_SERVER(d_inode(data->dir));
cdd4e68b 2416 struct rpc_task *task;
5138fde0
TM		 2417 struct rpc_message msg = {
2418 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
2419 .rpc_argp = &data->c_arg,
2420 .rpc_resp = &data->c_res,
2421 .rpc_cred = data->owner->so_cred,
2422 };
c970aa85
TM		 2423 struct rpc_task_setup task_setup_data = {
2424 .rpc_client = server->client,
5138fde0 2425 .rpc_message = &msg,
c970aa85
TM		 2426 .callback_ops = &nfs4_open_confirm_ops,
2427 .callback_data = data,
101070ca 2428 .workqueue = nfsiod_workqueue,
61296507 2429 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF,
c970aa85 2430 };
1da177e4
LT		 2431 int status;
2432
fba83f34
AS		 2433 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1,
2434 data->is_recover);
c6d00e63 2435 kref_get(&data->kref);
a7a3b1e9 2436 data->rpc_done = false;
3e309914 2437 data->rpc_status = 0;
5138fde0 2438 data->timestamp = jiffies;
c970aa85 2439 task = rpc_run_task(&task_setup_data);
7a1218a2 2440 if (IS_ERR(task))
cdd4e68b 2441 return PTR_ERR(task);
820bf85c 2442 status = rpc_wait_for_completion_task(task);
cdd4e68b 2443 if (status != 0) {
a7a3b1e9 2444 data->cancelled = true;
cdd4e68b
TM		 2445 smp_wmb();
2446 } else
2447 status = data->rpc_status;
e6b3c4db 2448 rpc_put_task(task);
1da177e4
LT		 2449 return status;
2450}
2451
24ac23ab 2452static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 2453{
24ac23ab
TM		 2454 struct nfs4_opendata *data = calldata;
2455 struct nfs4_state_owner *sp = data->owner;
549b19cc 2456 struct nfs_client *clp = sp->so_server->nfs_client;
2a606188 2457 enum open_claim_type4 claim = data->o_arg.claim;
5138fde0 2458
24ac23ab 2459 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 2460 goto out_wait;
aac00a8d
TM		 2461 /*
2462 * Check if we still need to send an OPEN call, or if we can use
2463 * a delegation instead.
2464 */
2465 if (data->state != NULL) {
2466 struct nfs_delegation *delegation;
2467
be189f7e
TM		 2468 if (can_open_cached(data->state, data->o_arg.fmode,
2469 data->o_arg.open_flags, claim))
6ee41268 2470 goto out_no_action;
aac00a8d 2471 rcu_read_lock();
be3df3dd 2472 delegation = nfs4_get_valid_delegation(data->state->inode);
2a606188 2473 if (can_open_delegated(delegation, data->o_arg.fmode, claim))
652f89f6 2474 goto unlock_no_action;
aac00a8d
TM		 2475 rcu_read_unlock();
2476 }
95b72eb0 2477 /* Update client id. */
549b19cc 2478 data->o_arg.clientid = clp->cl_clientid;
2a606188
TM		 2479 switch (claim) {
2480 default:
2481 break;
8188df17
TM		 2482 case NFS4_OPEN_CLAIM_PREVIOUS:
2483 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
2484 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 2485 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
df561f66 2486 fallthrough;
8188df17
TM		 2487 case NFS4_OPEN_CLAIM_FH:
2488 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5 2489 }
26e976a8 2490 data->timestamp = jiffies;
42e1cca7 2491 if (nfs4_setup_sequence(data->o_arg.server->nfs_client,
d898528c 2492 &data->o_arg.seq_args,
2240a9e2
TM		 2493 &data->o_res.seq_res,
2494 task) != 0)
2495 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 2496
2497 /* Set the create mode (note dependency on the session type) */
2498 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
2499 if (data->o_arg.open_flags & O_EXCL) {
a1e7f30a
TM		 2500 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
2501 if (clp->cl_mvops->minor_version == 0) {
2502 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
2503 /* don't put an ACCESS op in OPEN compound if O_EXCL,
2504 * because ACCESS will return permission denied for
2505 * all bits until close */
2506 data->o_res.access_request = data->o_arg.access = 0;
2507 } else if (nfs4_has_persistent_session(clp))
549b19cc 2508 data->o_arg.createmode = NFS4_CREATE_GUARDED;
549b19cc 2509 }
6ee41268 2510 return;
652f89f6 2511unlock_no_action:
9759b0fb 2512 trace_nfs4_cached_open(data->state);
652f89f6 2513 rcu_read_unlock();
6ee41268
TM		 2514out_no_action:
2515 task->tk_action = NULL;
c8da19b9 2516out_wait:
b75ad4cd 2517 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 2518}
2519
24ac23ab
TM		 2520static void nfs4_open_done(struct rpc_task *task, void *calldata)
2521{
2522 struct nfs4_opendata *data = calldata;
1da177e4 2523
24ac23ab 2524 data->rpc_status = task->tk_status;
d898528c 2525
2e80dbe7 2526 if (!nfs4_sequence_process(task, &data->o_res.seq_res))
14516c3a 2527 return;
d898528c 2528
24ac23ab 2529 if (task->tk_status == 0) {
807d66d8
TM		 2530 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
2531 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 2532 case S_IFREG:
2533 break;
2534 case S_IFLNK:
24ac23ab 2535 data->rpc_status = -ELOOP;
6f926b5b
TM		 2536 break;
2537 case S_IFDIR:
24ac23ab 2538 data->rpc_status = -EISDIR;
6f926b5b
TM		 2539 break;
2540 default:
24ac23ab 2541 data->rpc_status = -ENOTDIR;
807d66d8 2542 }
6f926b5b 2543 }
26e976a8 2544 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 2545 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
2546 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 2547 }
a7a3b1e9 2548 data->rpc_done = true;
24ac23ab 2549}
6f926b5b 2550
24ac23ab
TM		 2551static void nfs4_open_release(void *calldata)
2552{
2553 struct nfs4_opendata *data = calldata;
2554 struct nfs4_state *state = NULL;
2555
2556 /* If this request hasn't been cancelled, do nothing */
a7a3b1e9 2557 if (!data->cancelled)
24ac23ab
TM		 2558 goto out_free;
2559 /* In case of error, no cleanup! */
3e309914 2560 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 2561 goto out_free;
2562 /* In case we need an open_confirm, no cleanup! */
2563 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
2564 goto out_free;
24ac23ab 2565 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 2566 if (!IS_ERR(state))
643168c2 2567 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 2568out_free:
c6d00e63 2569 nfs4_opendata_put(data);
24ac23ab
TM		 2570}
2571
2572static const struct rpc_call_ops nfs4_open_ops = {
2573 .rpc_call_prepare = nfs4_open_prepare,
2574 .rpc_call_done = nfs4_open_done,
2575 .rpc_release = nfs4_open_release,
2576};
2577
3b65a30d
FI		 2578static int nfs4_run_open_task(struct nfs4_opendata *data,
2579 struct nfs_open_context *ctx)
24ac23ab 2580{
2b0143b5 2581 struct inode *dir = d_inode(data->dir);
24ac23ab
TM		 2582 struct nfs_server *server = NFS_SERVER(dir);
2583 struct nfs_openargs *o_arg = &data->o_arg;
2584 struct nfs_openres *o_res = &data->o_res;
2585 struct rpc_task *task;
5138fde0
TM		 2586 struct rpc_message msg = {
2587 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
2588 .rpc_argp = o_arg,
2589 .rpc_resp = o_res,
2590 .rpc_cred = data->owner->so_cred,
2591 };
c970aa85
TM		 2592 struct rpc_task_setup task_setup_data = {
2593 .rpc_client = server->client,
5138fde0 2594 .rpc_message = &msg,
c970aa85
TM		 2595 .callback_ops = &nfs4_open_ops,
2596 .callback_data = data,
101070ca 2597 .workqueue = nfsiod_workqueue,
61296507 2598 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF,
c970aa85 2599 };
24ac23ab
TM		 2600 int status;
2601
118f09ed 2602 if (nfs_server_capable(dir, NFS_CAP_MOVEABLE))
85e39fee
OK		 2603 task_setup_data.flags |= RPC_TASK_MOVEABLE;
2604
c6d00e63 2605 kref_get(&data->kref);
a7a3b1e9 2606 data->rpc_done = false;
3e309914 2607 data->rpc_status = 0;
a7a3b1e9
BC		 2608 data->cancelled = false;
2609 data->is_recover = false;
3b65a30d
FI		 2610 if (!ctx) {
2611 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1, 1);
a7a3b1e9 2612 data->is_recover = true;
67e7b52d 2613 task_setup_data.flags |= RPC_TASK_TIMEOUT;
2409a976 2614 } else {
3b65a30d 2615 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1, 0);
2409a976
FI		 2616 pnfs_lgopen_prepare(data, ctx);
2617 }
c970aa85 2618 task = rpc_run_task(&task_setup_data);
d9b67e1e
AS		 2619 if (IS_ERR(task))
2620 return PTR_ERR(task);
820bf85c 2621 status = rpc_wait_for_completion_task(task);
d9b67e1e 2622 if (status != 0) {
a7a3b1e9 2623 data->cancelled = true;
d9b67e1e
AS		 2624 smp_wmb();
2625 } else
2626 status = data->rpc_status;
2627 rpc_put_task(task);
b257957e
AB		 2628
2629 return status;
2630}
2631
2632static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
2633{
2b0143b5 2634 struct inode *dir = d_inode(data->dir);
b257957e 2635 struct nfs_openres *o_res = &data->o_res;
d9b67e1e 2636 int status;
b257957e 2637
3b65a30d 2638 status = nfs4_run_open_task(data, NULL);
b257957e
AB		 2639 if (status != 0 || !data->rpc_done)
2640 return status;
2641
6926afd1
TM		 2642 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
2643
d7e98258 2644 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM)
b257957e 2645 status = _nfs4_proc_open_confirm(data);
b257957e
AB		 2646
2647 return status;
2648}
2649
f3792d63
TM		 2650/*
2651 * Additional permission checks in order to distinguish between an
2652 * open for read, and an open for execute. This works around the
2653 * fact that NFSv4 OPEN treats read and execute permissions as being
2654 * the same.
2655 * Note that in the non-execute case, we want to turn off permission
2656 * checking if we just created a new file (POSIX open() semantics).
2657 */
a52458b4 2658static int nfs4_opendata_access(const struct cred *cred,
6168f62c 2659 struct nfs4_opendata *opendata,
d564d2c4 2660 struct nfs4_state *state, fmode_t fmode)
6168f62c
WAA		 2661{
2662 struct nfs_access_entry cache;
1e6f2095 2663 u32 mask, flags;
6168f62c
WAA		 2664
2665 /* access call failed or for some reason the server doesn't
2666 * support any access modes -- defer access call until later */
2667 if (opendata->o_res.access_supported == 0)
2668 return 0;
2669
2670 mask = 0;
d564d2c4 2671 if (fmode & FMODE_EXEC) {
f8d9a897 2672 /* ONLY check for exec rights */
1e6f2095
AS		 2673 if (S_ISDIR(state->inode->i_mode))
2674 mask = NFS4_ACCESS_LOOKUP;
2675 else
2676 mask = NFS4_ACCESS_EXECUTE;
f3792d63 2677 } else if ((fmode & FMODE_READ) && !opendata->file_created)
1e6f2095 2678 mask = NFS4_ACCESS_READ;
6168f62c 2679
6168f62c 2680 nfs_access_set_mask(&cache, opendata->o_res.access_result);
73fbb3fa 2681 nfs_access_add_cache(state->inode, &cache, cred);
6168f62c 2682
1e6f2095
AS		 2683 flags = NFS4_ACCESS_READ | NFS4_ACCESS_EXECUTE | NFS4_ACCESS_LOOKUP;
2684 if ((mask & ~cache.mask & flags) == 0)
6168f62c
WAA		 2685 return 0;
2686
998f40b5 2687 return -EACCES;
6168f62c
WAA		 2688}
2689
b257957e
AB		 2690/*
2691 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2692 */
3b65a30d
FI		 2693static int _nfs4_proc_open(struct nfs4_opendata *data,
2694 struct nfs_open_context *ctx)
b257957e 2695{
2b0143b5 2696 struct inode *dir = d_inode(data->dir);
b257957e
AB		 2697 struct nfs_server *server = NFS_SERVER(dir);
2698 struct nfs_openargs *o_arg = &data->o_arg;
2699 struct nfs_openres *o_res = &data->o_res;
2700 int status;
2701
3b65a30d 2702 status = nfs4_run_open_task(data, ctx);
08ef7bd3
TM		 2703 if (!data->rpc_done)
2704 return status;
2705 if (status != 0) {
2706 if (status == -NFS4ERR_BADNAME &&
2707 !(o_arg->open_flags & O_CREAT))
2708 return -ENOENT;
24ac23ab 2709 return status;
08ef7bd3 2710 }
24ac23ab 2711
6926afd1
TM		 2712 nfs_fattr_map_and_free_names(server, &data->f_attr);
2713
5bc2afc2 2714 if (o_arg->open_flags & O_CREAT) {
5bc2afc2 2715 if (o_arg->open_flags & O_EXCL)
a7a3b1e9 2716 data->file_created = true;
5bc2afc2 2717 else if (o_res->cinfo.before != o_res->cinfo.after)
a7a3b1e9 2718 data->file_created = true;
1eb5d98f
JL		 2719 if (data->file_created ||
2720 inode_peek_iversion_raw(dir) != o_res->cinfo.after)
1b523ca9
FL		 2721 nfs4_update_changeattr(dir, &o_res->cinfo,
2722 o_res->f_attr->time_start,
2723 NFS_INO_INVALID_DATA);
5bc2afc2 2724 }
0df5dd4a
TM		 2725 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2726 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 2727 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 2728 status = _nfs4_proc_open_confirm(data);
1da177e4 2729 if (status != 0)
24ac23ab 2730 return status;
1da177e4 2731 }
56e0d71e 2732 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR)) {
4506f23e
OK		 2733 struct nfs_fh *fh = &o_res->fh;
2734
56e0d71e 2735 nfs4_sequence_free_slot(&o_res->seq_res);
4506f23e
OK		 2736 if (o_arg->claim == NFS4_OPEN_CLAIM_FH)
2737 fh = NFS_FH(d_inode(data->dentry));
2738 nfs4_proc_getattr(server, fh, o_res->f_attr, NULL);
56e0d71e 2739 }
24ac23ab 2740 return 0;
1da177e4
LT		 2741}
2742
1da177e4
LT		 2743/*
2744 * OPEN_EXPIRED:
2745 * reclaim state on the server after a network partition.
2746 * Assumes caller holds the appropriate lock
2747 */
539cd03a 2748static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 2749{
e56e0b78 2750 struct nfs4_opendata *opendata;
864472e9 2751 int ret;
1da177e4 2752
51069e4a 2753 opendata = nfs4_open_recoverdata_alloc(ctx, state, NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 2754 if (IS_ERR(opendata))
2755 return PTR_ERR(opendata);
51069e4a
TM		 2756 /*
2757 * We're not recovering a delegation, so ask for no delegation.
2758 * Otherwise the recovery thread could deadlock with an outstanding
2759 * delegation return.
2760 */
2761 opendata->o_arg.open_flags = O_DIRECT;
864472e9 2762 ret = nfs4_open_recover(opendata, state);
35d05778 2763 if (ret == -ESTALE)
3d4ff43d 2764 d_drop(ctx->dentry);
c6d00e63 2765 nfs4_opendata_put(opendata);
864472e9 2766 return ret;
1da177e4
LT		 2767}
2768
a9ed2e25 2769static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 2770{
539cd03a 2771 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 2772 struct nfs4_exception exception = { };
2773 int err;
2774
2775 do {
539cd03a 2776 err = _nfs4_open_expired(ctx, state);
42113a75 2777 trace_nfs4_open_expired(ctx, 0, err);
49f9a0fa
TM		 2778 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2779 continue;
a9ed2e25
TM		 2780 switch (err) {
2781 default:
2782 goto out;
2783 case -NFS4ERR_GRACE:
2784 case -NFS4ERR_DELAY:
2785 nfs4_handle_exception(server, err, &exception);
2786 err = 0;
2787 }
202b50dc 2788 } while (exception.retry);
a9ed2e25 2789out:
202b50dc
TM		 2790 return err;
2791}
2792
1da177e4
LT		 2793static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2794{
1da177e4 2795 struct nfs_open_context *ctx;
864472e9 2796 int ret;
1da177e4 2797
864472e9
TM		 2798 ctx = nfs4_state_find_open_context(state);
2799 if (IS_ERR(ctx))
91876b13 2800 return -EAGAIN;
539cd03a 2801 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 2802 put_nfs_open_context(ctx);
2803 return ret;
1da177e4
LT		 2804}
2805
41020b67
TM		 2806static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state,
2807 const nfs4_stateid *stateid)
4dfd4f7a 2808{
41020b67 2809 nfs_remove_bad_delegation(state->inode, stateid);
9f0c5124 2810 nfs_state_clear_delegation(state);
4dfd4f7a
TM		 2811}
2812
2813static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
2814{
2815 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
41020b67 2816 nfs_finish_clear_delegation_stateid(state, NULL);
4dfd4f7a
TM		 2817}
2818
2819static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2820{
2821 /* NFSv4.0 doesn't allow for delegation recovery on open expire */
2822 nfs40_clear_delegation_stateid(state);
27a30cf6 2823 nfs_state_clear_open_state_flags(state);
4dfd4f7a
TM		 2824 return nfs4_open_expired(sp, state);
2825}
2826
45870d69
TM		 2827static int nfs40_test_and_free_expired_stateid(struct nfs_server *server,
2828 nfs4_stateid *stateid,
a52458b4 2829 const struct cred *cred)
45870d69
TM		 2830{
2831 return -NFS4ERR_BAD_STATEID;
2832}
2833
f062eb6c 2834#if defined(CONFIG_NFS_V4_1)
4586f6e2
TM		 2835static int nfs41_test_and_free_expired_stateid(struct nfs_server *server,
2836 nfs4_stateid *stateid,
a52458b4 2837 const struct cred *cred)
4586f6e2
TM		 2838{
2839 int status;
2840
f7a62ada
TM		 2841 switch (stateid->type) {
2842 default:
2843 break;
2844 case NFS4_INVALID_STATEID_TYPE:
2845 case NFS4_SPECIAL_STATEID_TYPE:
2846 return -NFS4ERR_BAD_STATEID;
2847 case NFS4_REVOKED_STATEID_TYPE:
2848 goto out_free;
2849 }
4586f6e2 2850
f7a62ada 2851 status = nfs41_test_stateid(server, stateid, cred);
4586f6e2
TM		 2852 switch (status) {
2853 case -NFS4ERR_EXPIRED:
2854 case -NFS4ERR_ADMIN_REVOKED:
2855 case -NFS4ERR_DELEG_REVOKED:
f7a62ada
TM		 2856 break;
2857 default:
4586f6e2
TM		 2858 return status;
2859 }
f7a62ada
TM		 2860out_free:
2861 /* Ack the revoked state to the server */
f0b0bf88 2862 nfs41_free_stateid(server, stateid, cred, true);
f7a62ada 2863 return -NFS4ERR_EXPIRED;
4586f6e2
TM		 2864}
2865
27a30cf6 2866static int nfs41_check_delegation_stateid(struct nfs4_state *state)
f062eb6c 2867{
f062eb6c 2868 struct nfs_server *server = NFS_SERVER(state->inode);
0c116cad 2869 nfs4_stateid stateid;
ab7cb0df 2870 struct nfs_delegation *delegation;
a52458b4 2871 const struct cred *cred = NULL;
27a30cf6 2872 int status, ret = NFS_OK;
3e60ffdd 2873
ab7cb0df
TM		 2874 /* Get the delegation credential for use by test/free_stateid */
2875 rcu_read_lock();
2876 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
0c116cad 2877 if (delegation == NULL) {
ab7cb0df 2878 rcu_read_unlock();
9f0c5124 2879 nfs_state_clear_delegation(state);
27a30cf6 2880 return NFS_OK;
0c116cad
TM		 2881 }
2882
fc51b1cf 2883 spin_lock(&delegation->lock);
0c116cad 2884 nfs4_stateid_copy(&stateid, &delegation->stateid);
0c116cad 2885
994b15b9
TM		 2886 if (!test_and_clear_bit(NFS_DELEGATION_TEST_EXPIRED,
2887 &delegation->flags)) {
fc51b1cf 2888 spin_unlock(&delegation->lock);
4c8e5447 2889 rcu_read_unlock();
27a30cf6 2890 return NFS_OK;
4c8e5447 2891 }
0c116cad 2892
a52458b4
N		 2893 if (delegation->cred)
2894 cred = get_cred(delegation->cred);
fc51b1cf 2895 spin_unlock(&delegation->lock);
0c116cad 2896 rcu_read_unlock();
4586f6e2 2897 status = nfs41_test_and_free_expired_stateid(server, &stateid, cred);
0c116cad 2898 trace_nfs4_test_delegation_stateid(state, NULL, status);
f7a62ada 2899 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID)
41020b67 2900 nfs_finish_clear_delegation_stateid(state, &stateid);
27a30cf6
TM		 2901 else
2902 ret = status;
ab7cb0df 2903
8c39a39e 2904 put_cred(cred);
27a30cf6
TM		 2905 return ret;
2906}
2907
2908static void nfs41_delegation_recover_stateid(struct nfs4_state *state)
2909{
2910 nfs4_stateid tmp;
2911
2912 if (test_bit(NFS_DELEGATED_STATE, &state->flags) &&
2913 nfs4_copy_delegation_stateid(state->inode, state->state,
2914 &tmp, NULL) &&
2915 nfs4_stateid_match_other(&state->stateid, &tmp))
2916 nfs_state_set_delegation(state, &tmp, state->state);
2917 else
2918 nfs_state_clear_delegation(state);
3e60ffdd
CL		 2919}
2920
c5896fc8
TM		 2921/**
2922 * nfs41_check_expired_locks - possibly free a lock stateid
2923 *
2924 * @state: NFSv4 state for an inode
2925 *
2926 * Returns NFS_OK if recovery for this stateid is now finished.
2927 * Otherwise a negative NFS4ERR value is returned.
2928 */
2929static int nfs41_check_expired_locks(struct nfs4_state *state)
2930{
2931 int status, ret = NFS_OK;
d75a6a0e 2932 struct nfs4_lock_state *lsp, *prev = NULL;
c5896fc8
TM		 2933 struct nfs_server *server = NFS_SERVER(state->inode);
2934
2935 if (!test_bit(LK_STATE_IN_USE, &state->flags))
2936 goto out;
d75a6a0e
BC		 2937
2938 spin_lock(&state->state_lock);
c5896fc8
TM		 2939 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
2940 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
a52458b4 2941 const struct cred *cred = lsp->ls_state->owner->so_cred;
c5896fc8 2942
194bc1f4 2943 refcount_inc(&lsp->ls_count);
d75a6a0e
BC		 2944 spin_unlock(&state->state_lock);
2945
2946 nfs4_put_lock_state(prev);
2947 prev = lsp;
2948
c5896fc8
TM		 2949 status = nfs41_test_and_free_expired_stateid(server,
2950 &lsp->ls_stateid,
2951 cred);
2952 trace_nfs4_test_lock_stateid(state, lsp, status);
2953 if (status == -NFS4ERR_EXPIRED ||
2954 status == -NFS4ERR_BAD_STATEID) {
2955 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
67dd4830 2956 lsp->ls_stateid.type = NFS4_INVALID_STATEID_TYPE;
c5896fc8
TM		 2957 if (!recover_lost_locks)
2958 set_bit(NFS_LOCK_LOST, &lsp->ls_flags);
2959 } else if (status != NFS_OK) {
2960 ret = status;
d75a6a0e
BC		 2961 nfs4_put_lock_state(prev);
2962 goto out;
c5896fc8 2963 }
d75a6a0e 2964 spin_lock(&state->state_lock);
c5896fc8 2965 }
d75a6a0e
BC		 2966 }
2967 spin_unlock(&state->state_lock);
2968 nfs4_put_lock_state(prev);
c5896fc8
TM		 2969out:
2970 return ret;
2971}
2972
3e60ffdd
CL		 2973/**
2974 * nfs41_check_open_stateid - possibly free an open stateid
2975 *
2976 * @state: NFSv4 state for an inode
2977 *
2978 * Returns NFS_OK if recovery for this stateid is now finished.
2979 * Otherwise a negative NFS4ERR value is returned.
2980 */
2981static int nfs41_check_open_stateid(struct nfs4_state *state)
2982{
2983 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 2984 nfs4_stateid *stateid = &state->open_stateid;
a52458b4 2985 const struct cred *cred = state->owner->so_cred;
3e60ffdd
CL		 2986 int status;
2987
27a30cf6 2988 if (test_bit(NFS_OPEN_STATE, &state->flags) == 0)
3e60ffdd 2989 return -NFS4ERR_BAD_STATEID;
4586f6e2 2990 status = nfs41_test_and_free_expired_stateid(server, stateid, cred);
08cb47fa 2991 trace_nfs4_test_open_stateid(state, NULL, status);
f7a62ada 2992 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID) {
27a30cf6 2993 nfs_state_clear_open_state_flags(state);
67dd4830 2994 stateid->type = NFS4_INVALID_STATEID_TYPE;
8a64c4ef 2995 return status;
c0ca0e59 2996 }
8a64c4ef
TM		 2997 if (nfs_open_stateid_recover_openmode(state))
2998 return -NFS4ERR_OPENMODE;
2999 return NFS_OK;
b01dd1d8
BS		 3000}
3001
3002static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
3003{
eb64cf96 3004 int status;
b01dd1d8 3005
27a30cf6
TM		 3006 status = nfs41_check_delegation_stateid(state);
3007 if (status != NFS_OK)
3008 return status;
3009 nfs41_delegation_recover_stateid(state);
3010
c5896fc8
TM		 3011 status = nfs41_check_expired_locks(state);
3012 if (status != NFS_OK)
3013 return status;
3e60ffdd 3014 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 3015 if (status != NFS_OK)
3016 status = nfs4_open_expired(sp, state);
3017 return status;
f062eb6c
BS		 3018}
3019#endif
3020
aa53ed54
JL		 3021/*
3022 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
3023 * fields corresponding to attributes that were used to store the verifier.
3024 * Make sure we clobber those fields in the later setattr call
3025 */
609339c1 3026static unsigned nfs4_exclusive_attrset(struct nfs4_opendata *opendata,
5334c5bd 3027 struct iattr *sattr, struct nfs4_label **label)
aa53ed54 3028{
609339c1
TM		 3029 const __u32 *bitmask = opendata->o_arg.server->exclcreat_bitmask;
3030 __u32 attrset[3];
3031 unsigned ret;
3032 unsigned i;
5334c5bd 3033
609339c1
TM		 3034 for (i = 0; i < ARRAY_SIZE(attrset); i++) {
3035 attrset[i] = opendata->o_res.attrset[i];
3036 if (opendata->o_arg.createmode == NFS4_CREATE_EXCLUSIVE4_1)
3037 attrset[i] &= ~bitmask[i];
3038 }
3039
3040 ret = (opendata->o_arg.createmode == NFS4_CREATE_EXCLUSIVE) ?
3041 sattr->ia_valid : 0;
aa53ed54 3042
609339c1
TM		 3043 if ((attrset[1] & (FATTR4_WORD1_TIME_ACCESS|FATTR4_WORD1_TIME_ACCESS_SET))) {
3044 if (sattr->ia_valid & ATTR_ATIME_SET)
3045 ret |= ATTR_ATIME_SET;
3046 else
3047 ret |= ATTR_ATIME;
3048 }
5334c5bd 3049
609339c1
TM		 3050 if ((attrset[1] & (FATTR4_WORD1_TIME_MODIFY|FATTR4_WORD1_TIME_MODIFY_SET))) {
3051 if (sattr->ia_valid & ATTR_MTIME_SET)
3052 ret |= ATTR_MTIME_SET;
3053 else
3054 ret |= ATTR_MTIME;
3055 }
5334c5bd 3056
609339c1 3057 if (!(attrset[2] & FATTR4_WORD2_SECURITY_LABEL))
5334c5bd 3058 *label = NULL;
609339c1 3059 return ret;
aa53ed54
JL		 3060}
3061
c21443c2 3062static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
d564d2c4 3063 struct nfs_open_context *ctx)
c21443c2
TM		 3064{
3065 struct nfs4_state_owner *sp = opendata->owner;
3066 struct nfs_server *server = sp->so_server;
275bb307 3067 struct dentry *dentry;
c21443c2 3068 struct nfs4_state *state;
1bf85d8c 3069 fmode_t acc_mode = _nfs4_ctx_to_accessmode(ctx);
cf5b4059
TM		 3070 struct inode *dir = d_inode(opendata->dir);
3071 unsigned long dir_verifier;
c21443c2
TM		 3072 int ret;
3073
cf5b4059 3074 dir_verifier = nfs_save_change_attribute(dir);
c21443c2 3075
3b65a30d 3076 ret = _nfs4_proc_open(opendata, ctx);
dca78001 3077 if (ret != 0)
c21443c2
TM		 3078 goto out;
3079
ae55e59d 3080 state = _nfs4_opendata_to_nfs4_state(opendata);
c21443c2
TM		 3081 ret = PTR_ERR(state);
3082 if (IS_ERR(state))
3083 goto out;
a974deee 3084 ctx->state = state;
c21443c2
TM		 3085 if (server->caps & NFS_CAP_POSIX_LOCK)
3086 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
a8ce377a
JL		 3087 if (opendata->o_res.rflags & NFS4_OPEN_RESULT_MAY_NOTIFY_LOCK)
3088 set_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags);
43245eca
OK		 3089 if (opendata->o_res.rflags & NFS4_OPEN_RESULT_PRESERVE_UNLINKED)
3090 set_bit(NFS_INO_PRESERVE_UNLINKED, &NFS_I(state->inode)->flags);
c21443c2 3091
275bb307 3092 dentry = opendata->dentry;
2b0143b5 3093 if (d_really_is_negative(dentry)) {
668d0cd5 3094 struct dentry *alias;
275bb307 3095 d_drop(dentry);
668d0cd5
AV		 3096 alias = d_exact_alias(dentry, state->inode);
3097 if (!alias)
3098 alias = d_splice_alias(igrab(state->inode), dentry);
3099 /* d_splice_alias() can't fail here - it's a non-directory */
3100 if (alias) {
275bb307 3101 dput(ctx->dentry);
668d0cd5 3102 ctx->dentry = dentry = alias;
275bb307 3103 }
cf5b4059
TM		 3104 }
3105
3106 switch(opendata->o_arg.claim) {
3107 default:
3108 break;
3109 case NFS4_OPEN_CLAIM_NULL:
3110 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
3111 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
3112 if (!opendata->rpc_done)
3113 break;
3114 if (opendata->o_res.delegation_type != 0)
3115 dir_verifier = nfs_save_change_attribute(dir);
3116 nfs_set_verifier(dentry, dir_verifier);
275bb307
TM		 3117 }
3118
af9b6d75
TM		 3119 /* Parse layoutget results before we check for access */
3120 pnfs_parse_lgopen(state->inode, opendata->lgp, ctx);
3121
d564d2c4 3122 ret = nfs4_opendata_access(sp->so_cred, opendata, state, acc_mode);
c21443c2
TM		 3123 if (ret != 0)
3124 goto out;
3125
04602539 3126 if (d_inode(dentry) == state->inode)
c45ffdd2 3127 nfs_inode_attach_open_context(ctx);
2409a976 3128
c21443c2 3129out:
2135e5d5
TM		 3130 if (!opendata->cancelled) {
3131 if (opendata->lgp) {
3132 nfs4_lgopen_release(opendata->lgp);
3133 opendata->lgp = NULL;
3134 }
0cb98abb 3135 nfs4_sequence_free_slot(&opendata->o_res.seq_res);
2135e5d5 3136 }
c21443c2
TM		 3137 return ret;
3138}
3139
1da177e4 3140/*
24ac23ab 3141 * Returns a referenced nfs4_state
1da177e4 3142 */
82be417a 3143static int _nfs4_do_open(struct inode *dir,
4197a055 3144 struct nfs_open_context *ctx,
82be417a 3145 int flags,
8fd1ab74 3146 const struct nfs4_open_createattrs *c,
5bc2afc2 3147 int *opened)
1da177e4
LT		 3148{
3149 struct nfs4_state_owner *sp;
3150 struct nfs4_state *state = NULL;
3151 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 3152 struct nfs4_opendata *opendata;
4197a055 3153 struct dentry *dentry = ctx->dentry;
a52458b4 3154 const struct cred *cred = ctx->cred;
4197a055 3155 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
1bf85d8c 3156 fmode_t fmode = _nfs4_ctx_to_openmode(ctx);
49f9a0fa 3157 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
8fd1ab74
TM		 3158 struct iattr *sattr = c->sattr;
3159 struct nfs4_label *label = c->label;
aac00a8d 3160 int status;
1da177e4
LT		 3161
3162 /* Protect against reboot recovery conflicts */
1da177e4 3163 status = -ENOMEM;
d1e284d5
TM		 3164 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
3165 if (sp == NULL) {
1da177e4
LT		 3166 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
3167 goto out_err;
3168 }
334f87dd 3169 status = nfs4_client_recover_expired_lease(server->nfs_client);
58d9714a 3170 if (status != 0)
b4454fe1 3171 goto err_put_state_owner;
2b0143b5
DH		 3172 if (d_really_is_positive(dentry))
3173 nfs4_return_incompatible_delegation(d_inode(dentry), fmode);
58d9714a 3174 status = -ENOMEM;
2b0143b5 3175 if (d_really_is_positive(dentry))
49f9a0fa 3176 claim = NFS4_OPEN_CLAIM_FH;
8fd1ab74
TM		 3177 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags,
3178 c, claim, GFP_KERNEL);
e56e0b78 3179 if (opendata == NULL)
95d35cb4 3180 goto err_put_state_owner;
1da177e4 3181
e911b815
TM		 3182 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
3183 if (!opendata->f_attr.mdsthreshold) {
3184 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
3185 if (!opendata->f_attr.mdsthreshold)
76baa2b2 3186 goto err_opendata_put;
e911b815 3187 }
1549210f 3188 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 3189 }
2b0143b5
DH		 3190 if (d_really_is_positive(dentry))
3191 opendata->state = nfs4_get_open_state(d_inode(dentry), sp);
aac00a8d 3192
d564d2c4 3193 status = _nfs4_open_and_get_state(opendata, ctx);
6168f62c 3194 if (status != 0)
76baa2b2 3195 goto err_opendata_put;
3efb9722 3196 state = ctx->state;
6168f62c 3197
efcbc04e 3198 if ((opendata->o_arg.open_flags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) &&
549b19cc 3199 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
609339c1 3200 unsigned attrs = nfs4_exclusive_attrset(opendata, sattr, &label);
a1d1c4f1
TM		 3201 /*
3202 * send create attributes which was not set by open
3203 * with an extra setattr.
3204 */
609339c1
TM		 3205 if (attrs || label) {
3206 unsigned ia_old = sattr->ia_valid;
3207
3208 sattr->ia_valid = attrs;
a1d1c4f1
TM		 3209 nfs_fattr_init(opendata->o_res.f_attr);
3210 status = nfs4_do_setattr(state->inode, cred,
3211 opendata->o_res.f_attr, sattr,
1b00ad65 3212 ctx, label);
a1d1c4f1
TM		 3213 if (status == 0) {
3214 nfs_setattr_update_inode(state->inode, sattr,
3215 opendata->o_res.f_attr);
dd225cb3 3216 nfs_setsecurity(state->inode, opendata->o_res.f_attr);
a1d1c4f1 3217 }
609339c1 3218 sattr->ia_valid = ia_old;
1775fd3e 3219 }
0ab64e0e 3220 }
c5c3fb5f 3221 if (opened && opendata->file_created)
73a09dd9 3222 *opened = 1;
82be417a 3223
e911b815 3224 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
82be417a 3225 *ctx_th = opendata->f_attr.mdsthreshold;
e911b815
TM		 3226 opendata->f_attr.mdsthreshold = NULL;
3227 }
82be417a 3228
c6d00e63 3229 nfs4_opendata_put(opendata);
1da177e4 3230 nfs4_put_state_owner(sp);
1da177e4 3231 return 0;
c6d00e63
TM		 3232err_opendata_put:
3233 nfs4_opendata_put(opendata);
e56e0b78
TM		 3234err_put_state_owner:
3235 nfs4_put_state_owner(sp);
1da177e4 3236out_err:
1da177e4
LT		 3237 return status;
3238}
3239
3240
82be417a 3241static struct nfs4_state *nfs4_do_open(struct inode *dir,
4197a055 3242 struct nfs_open_context *ctx,
82be417a
AA		 3243 int flags,
3244 struct iattr *sattr,
5bc2afc2
TM		 3245 struct nfs4_label *label,
3246 int *opened)
1da177e4 3247{
49f9a0fa 3248 struct nfs_server *server = NFS_SERVER(dir);
0688e64b
TM		 3249 struct nfs4_exception exception = {
3250 .interruptible = true,
3251 };
1da177e4 3252 struct nfs4_state *res;
8fd1ab74
TM		 3253 struct nfs4_open_createattrs c = {
3254 .label = label,
3255 .sattr = sattr,
3256 .verf = {
3257 [0] = (__u32)jiffies,
3258 [1] = (__u32)current->pid,
3259 },
3260 };
1da177e4
LT		 3261 int status;
3262
3263 do {
8fd1ab74 3264 status = _nfs4_do_open(dir, ctx, flags, &c, opened);
3efb9722 3265 res = ctx->state;
42113a75 3266 trace_nfs4_open_file(ctx, flags, status);
1da177e4
LT		 3267 if (status == 0)
3268 break;
3269 /* NOTE: BAD_SEQID means the server and client disagree about the
3270 * book-keeping w.r.t. state-changing operations
3271 * (OPEN/CLOSE/LOCK/LOCKU...)
3272 * It is actually a sign of a bug on the client or on the server.
3273 *
3274 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 3275 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 3276 * have unhashed the old state_owner for us, and that we can
3277 * therefore safely retry using a new one. We should still warn
3278 * the user though...
3279 */
3280 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 3281 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 3282 " returned a bad sequence-id error!\n",
3283 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 3284 exception.retry = 1;
3285 continue;
3286 }
550f5747
TM		 3287 /*
3288 * BAD_STATEID on OPEN means that the server cancelled our
3289 * state before it received the OPEN_CONFIRM.
3290 * Recover by retrying the request as per the discussion
3291 * on Page 181 of RFC3530.
3292 */
3293 if (status == -NFS4ERR_BAD_STATEID) {
3294 exception.retry = 1;
3295 continue;
3296 }
924491f2
RM		 3297 if (status == -NFS4ERR_EXPIRED) {
3298 nfs4_schedule_lease_recovery(server->nfs_client);
3299 exception.retry = 1;
3300 continue;
3301 }
aac00a8d
TM		 3302 if (status == -EAGAIN) {
3303 /* We must have found a delegation */
3304 exception.retry = 1;
3305 continue;
3306 }
49f9a0fa
TM		 3307 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
3308 continue;
3309 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 3310 status, &exception));
3311 } while (exception.retry);
3312 return res;
3313}
3314
8487c479
TM		 3315static int _nfs4_do_setattr(struct inode *inode,
3316 struct nfs_setattrargs *arg,
3317 struct nfs_setattrres *res,
a52458b4 3318 const struct cred *cred,
29b59f94 3319 struct nfs_open_context *ctx)
1da177e4 3320{
3e4f6290 3321 struct nfs_server *server = NFS_SERVER(inode);
d9b67e1e 3322 struct rpc_message msg = {
659bfcd6 3323 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
8487c479
TM		 3324 .rpc_argp = arg,
3325 .rpc_resp = res,
659bfcd6 3326 .rpc_cred = cred,
d9b67e1e 3327 };
a52458b4 3328 const struct cred *delegation_cred = NULL;
26e976a8 3329 unsigned long timestamp = jiffies;
ee3ae84e 3330 bool truncate;
65e4308d 3331 int status;
1da177e4 3332
8487c479 3333 nfs_fattr_init(res->fattr);
1da177e4 3334
ee3ae84e 3335 /* Servers should only apply open mode checks for file size changes */
8487c479 3336 truncate = (arg->iap->ia_valid & ATTR_SIZE) ? true : false;
644c9f40
CL		 3337 if (!truncate) {
3338 nfs4_inode_make_writeable(inode);
991eedb1 3339 goto zero_stateid;
644c9f40 3340 }
ee3ae84e 3341
991eedb1 3342 if (nfs4_copy_delegation_stateid(inode, FMODE_WRITE, &arg->stateid, &delegation_cred)) {
ee3ae84e 3343 /* Use that stateid */
09a54f0e 3344 } else if (ctx != NULL && ctx->state) {
17393475 3345 struct nfs_lock_context *l_ctx;
29b59f94 3346 if (!nfs4_valid_open_stateid(ctx->state))
0418dae1 3347 return -EBADF;
17393475
N		 3348 l_ctx = nfs_get_lock_context(ctx);
3349 if (IS_ERR(l_ctx))
3350 return PTR_ERR(l_ctx);
7a0566b3
N		 3351 status = nfs4_select_rw_stateid(ctx->state, FMODE_WRITE, l_ctx,
3352 &arg->stateid, &delegation_cred);
3353 nfs_put_lock_context(l_ctx);
3354 if (status == -EIO)
0418dae1 3355 return -EBADF;
d826e5b8
OK		 3356 else if (status == -EAGAIN)
3357 goto zero_stateid;
991eedb1
TM		 3358 } else {
3359zero_stateid:
8487c479 3360 nfs4_stateid_copy(&arg->stateid, &zero_stateid);
991eedb1 3361 }
abf4e13c
TM		 3362 if (delegation_cred)
3363 msg.rpc_cred = delegation_cred;
1da177e4 3364
8487c479 3365 status = nfs4_call_sync(server->client, server, &msg, &arg->seq_args, &res->seq_res, 1);
abf4e13c 3366
a52458b4 3367 put_cred(delegation_cred);
29b59f94 3368 if (status == 0 && ctx != NULL)
26e976a8 3369 renew_lease(server, timestamp);
8487c479 3370 trace_nfs4_setattr(inode, &arg->stateid, status);
65e4308d 3371 return status;
1da177e4
LT		 3372}
3373
a52458b4 3374static int nfs4_do_setattr(struct inode *inode, const struct cred *cred,
659bfcd6 3375 struct nfs_fattr *fattr, struct iattr *sattr,
1b00ad65 3376 struct nfs_open_context *ctx, struct nfs4_label *ilabel)
1da177e4 3377{
3e4f6290 3378 struct nfs_server *server = NFS_SERVER(inode);
30846df0 3379 __u32 bitmask[NFS4_BITMASK_SZ];
29b59f94 3380 struct nfs4_state *state = ctx ? ctx->state : NULL;
d9b67e1e
AS		 3381 struct nfs_setattrargs arg = {
3382 .fh = NFS_FH(inode),
3383 .iap = sattr,
8487c479 3384 .server = server,
30846df0 3385 .bitmask = bitmask,
8487c479 3386 .label = ilabel,
d9b67e1e
AS		 3387 };
3388 struct nfs_setattrres res = {
8487c479 3389 .fattr = fattr,
8487c479 3390 .server = server,
d9b67e1e 3391 };
a1d0b5ee
TM		 3392 struct nfs4_exception exception = {
3393 .state = state,
3114ea7a 3394 .inode = inode,
8487c479 3395 .stateid = &arg.stateid,
a1d0b5ee 3396 };
a71029b8 3397 unsigned long adjust_flags = NFS_INO_INVALID_CHANGE;
1da177e4 3398 int err;
8487c479 3399
720869eb
TM		 3400 if (sattr->ia_valid & (ATTR_MODE | ATTR_KILL_SUID | ATTR_KILL_SGID))
3401 adjust_flags |= NFS_INO_INVALID_MODE;
3402 if (sattr->ia_valid & (ATTR_UID | ATTR_GID))
a71029b8
TM		 3403 adjust_flags |= NFS_INO_INVALID_OTHER;
3404
1da177e4 3405 do {
1b00ad65 3406 nfs4_bitmap_copy_adjust(bitmask, nfs4_bitmask(server, fattr->label),
a71029b8 3407 inode, adjust_flags);
30846df0 3408
29b59f94 3409 err = _nfs4_do_setattr(inode, &arg, &res, cred, ctx);
451146be
TM		 3410 switch (err) {
3411 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 3412 if (!(sattr->ia_valid & ATTR_SIZE)) {
3413 pr_warn_once("NFSv4: server %s is incorrectly "
3414 "applying open mode checks to "
3415 "a SETATTR that is not "
3416 "changing file size.\n",
3417 server->nfs_client->cl_hostname);
3418 }
451146be
TM		 3419 if (state && !(state->state & FMODE_WRITE)) {
3420 err = -EBADF;
3421 if (sattr->ia_valid & ATTR_OPEN)
3422 err = -EACCES;
3423 goto out;
3424 }
3425 }
3426 err = nfs4_handle_exception(server, err, &exception);
1da177e4 3427 } while (exception.retry);
451146be 3428out:
1da177e4
LT		 3429 return err;
3430}
3431
500d701f
PT		 3432static bool
3433nfs4_wait_on_layoutreturn(struct inode *inode, struct rpc_task *task)
3434{
3435 if (inode == NULL || !nfs_have_layout(inode))
3436 return false;
3437
3438 return pnfs_wait_on_layoutreturn(inode, task);
3439}
3440
0e0cb35b
TM		 3441/*
3442 * Update the seqid of an open stateid
3443 */
3444static void nfs4_sync_open_stateid(nfs4_stateid *dst,
3445 struct nfs4_state *state)
3446{
3447 __be32 seqid_open;
3448 u32 dst_seqid;
3449 int seq;
3450
3451 for (;;) {
3452 if (!nfs4_valid_open_stateid(state))
3453 break;
3454 seq = read_seqbegin(&state->seqlock);
3455 if (!nfs4_state_match_open_stateid_other(state, dst)) {
3456 nfs4_stateid_copy(dst, &state->open_stateid);
3457 if (read_seqretry(&state->seqlock, seq))
3458 continue;
3459 break;
3460 }
3461 seqid_open = state->open_stateid.seqid;
3462 if (read_seqretry(&state->seqlock, seq))
3463 continue;
3464
3465 dst_seqid = be32_to_cpu(dst->seqid);
3466 if ((s32)(dst_seqid - be32_to_cpu(seqid_open)) < 0)
3467 dst->seqid = seqid_open;
3468 break;
3469 }
3470}
3471
3472/*
3473 * Update the seqid of an open stateid after receiving
3474 * NFS4ERR_OLD_STATEID
3475 */
3476static bool nfs4_refresh_open_old_stateid(nfs4_stateid *dst,
3477 struct nfs4_state *state)
3478{
3479 __be32 seqid_open;
3480 u32 dst_seqid;
3481 bool ret;
b4868b44
BC		 3482 int seq, status = -EAGAIN;
3483 DEFINE_WAIT(wait);
0e0cb35b
TM		 3484
3485 for (;;) {
3486 ret = false;
3487 if (!nfs4_valid_open_stateid(state))
3488 break;
3489 seq = read_seqbegin(&state->seqlock);
3490 if (!nfs4_state_match_open_stateid_other(state, dst)) {
3491 if (read_seqretry(&state->seqlock, seq))
3492 continue;
3493 break;
3494 }
b4868b44
BC		 3495
3496 write_seqlock(&state->seqlock);
0e0cb35b 3497 seqid_open = state->open_stateid.seqid;
0e0cb35b
TM		 3498
3499 dst_seqid = be32_to_cpu(dst->seqid);
b4868b44
BC		 3500
3501 /* Did another OPEN bump the state's seqid? try again: */
3502 if ((s32)(be32_to_cpu(seqid_open) - dst_seqid) > 0) {
0e0cb35b 3503 dst->seqid = seqid_open;
b4868b44
BC		 3504 write_sequnlock(&state->seqlock);
3505 ret = true;
3506 break;
3507 }
3508
3509 /* server says we're behind but we haven't seen the update yet */
3510 set_bit(NFS_STATE_CHANGE_WAIT, &state->flags);
3511 prepare_to_wait(&state->waitq, &wait, TASK_KILLABLE);
3512 write_sequnlock(&state->seqlock);
3513 trace_nfs4_close_stateid_update_wait(state->inode, dst, 0);
3514
bb002388 3515 if (fatal_signal_pending(current))
b4868b44
BC		 3516 status = -EINTR;
3517 else
3518 if (schedule_timeout(5*HZ) != 0)
3519 status = 0;
3520
3521 finish_wait(&state->waitq, &wait);
3522
3523 if (!status)
3524 continue;
3525 if (status == -EINTR)
3526 break;
3527
3528 /* we slept the whole 5 seconds, we must have lost a seqid */
3529 dst->seqid = cpu_to_be32(dst_seqid + 1);
0e0cb35b
TM		 3530 ret = true;
3531 break;
3532 }
3533
3534 return ret;
3535}
3536
1da177e4
LT		 3537struct nfs4_closedata {
3538 struct inode *inode;
3539 struct nfs4_state *state;
3540 struct nfs_closeargs arg;
3541 struct nfs_closeres res;
cf805165
TM		 3542 struct {
3543 struct nfs4_layoutreturn_args arg;
3544 struct nfs4_layoutreturn_res res;
4d796d75 3545 struct nfs4_xdr_opaque_data ld_private;
cf805165
TM		 3546 u32 roc_barrier;
3547 bool roc;
3548 } lr;
516a6af6 3549 struct nfs_fattr fattr;
26e976a8 3550 unsigned long timestamp;
1da177e4
LT		 3551};
3552
963d8fe5 3553static void nfs4_free_closedata(void *data)
9512135d 3554{
963d8fe5
TM		 3555 struct nfs4_closedata *calldata = data;
3556 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 3557 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 3558
cf805165 3559 if (calldata->lr.roc)
1c5bd76d
TM		 3560 pnfs_roc_release(&calldata->lr.arg, &calldata->lr.res,
3561 calldata->res.lr_ret);
9512135d
TM		 3562 nfs4_put_open_state(calldata->state);
3563 nfs_free_seqid(calldata->arg.seqid);
9512135d 3564 nfs4_put_state_owner(sp);
322b2b90 3565 nfs_sb_deactive(sb);
9512135d
TM		 3566 kfree(calldata);
3567}
3568
963d8fe5 3569static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 3570{
963d8fe5 3571 struct nfs4_closedata *calldata = data;
1da177e4 3572 struct nfs4_state *state = calldata->state;
1da177e4 3573 struct nfs_server *server = NFS_SERVER(calldata->inode);
412f6c4c 3574 nfs4_stateid *res_stateid = NULL;
b8b8d221
TM		 3575 struct nfs4_exception exception = {
3576 .state = state,
3577 .inode = calldata->inode,
3578 .stateid = &calldata->arg.stateid,
3579 };
1da177e4 3580
14516c3a
TM		 3581 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
3582 return;
42113a75 3583 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
cf805165
TM		 3584
3585 /* Handle Layoutreturn errors */
078000d0
TM		 3586 if (pnfs_roc_done(task, &calldata->arg.lr_args, &calldata->res.lr_res,
3587 &calldata->res.lr_ret) == -EAGAIN)
287a9c55 3588 goto out_restart;
cf805165 3589
d9b67e1e 3590 /* hmm. we are done with the inode, and in the process of freeing
1da177e4
LT		 3591 * the state_owner. we keep this around to process errors
3592 */
1da177e4
LT		 3593 switch (task->tk_status) {
3594 case 0:
412f6c4c 3595 res_stateid = &calldata->res.stateid;
26e976a8 3596 renew_lease(server, calldata->timestamp);
412f6c4c 3597 break;
f07d4a31
TM		 3598 case -NFS4ERR_ACCESS:
3599 if (calldata->arg.bitmask != NULL) {
3600 calldata->arg.bitmask = NULL;
3601 calldata->res.fattr = NULL;
91b30d2e 3602 goto out_restart;
f07d4a31
TM		 3603
3604 }
3605 break;
12f275cd
TM		 3606 case -NFS4ERR_OLD_STATEID:
3607 /* Did we race with OPEN? */
0e0cb35b 3608 if (nfs4_refresh_open_old_stateid(&calldata->arg.stateid,
91b30d2e
TM		 3609 state))
3610 goto out_restart;
12f275cd 3611 goto out_release;
69794ad7 3612 case -NFS4ERR_ADMIN_REVOKED:
1da177e4 3613 case -NFS4ERR_STALE_STATEID:
26d36301
TM		 3614 case -NFS4ERR_EXPIRED:
3615 nfs4_free_revoked_stateid(server,
3616 &calldata->arg.stateid,
3617 task->tk_msg.rpc_cred);
df561f66 3618 fallthrough;
9e33bed5 3619 case -NFS4ERR_BAD_STATEID:
e217e825
TM		 3620 if (calldata->arg.fmode == 0)
3621 break;
df561f66 3622 fallthrough;
1da177e4 3623 default:
b8b8d221
TM		 3624 task->tk_status = nfs4_async_handle_exception(task,
3625 server, task->tk_status, &exception);
3626 if (exception.retry)
91b30d2e 3627 goto out_restart;
1da177e4 3628 }
4a1e2feb
TM		 3629 nfs_clear_open_stateid(state, &calldata->arg.stateid,
3630 res_stateid, calldata->arg.fmode);
69794ad7 3631out_release:
91b30d2e 3632 task->tk_status = 0;
72211dbe 3633 nfs_release_seqid(calldata->arg.seqid);
d8d84983 3634 nfs_refresh_inode(calldata->inode, &calldata->fattr);
86882c75 3635 dprintk("%s: ret = %d\n", __func__, task->tk_status);
91b30d2e 3636 return;
91b30d2e
TM		 3637out_restart:
3638 task->tk_status = 0;
3639 rpc_restart_call_prepare(task);
3640 goto out_release;
1da177e4
LT		 3641}
3642
4ce70ada 3643static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 3644{
4ce70ada 3645 struct nfs4_closedata *calldata = data;
9512135d 3646 struct nfs4_state *state = calldata->state;
7fdab069 3647 struct inode *inode = calldata->inode;
332d1a03 3648 struct nfs_server *server = NFS_SERVER(inode);
c8bf7073 3649 struct pnfs_layout_hdr *lo;
aee7af35 3650 bool is_rdonly, is_wronly, is_rdwr;
88069f77 3651 int call_close = 0;
9512135d 3652
963d8fe5 3653 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 3654 goto out_wait;
003707c7 3655
88069f77 3656 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
4cecb76f 3657 spin_lock(&state->owner->so_lock);
aee7af35
TM		 3658 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
3659 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
3660 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
003707c7 3661 /* Calculate the change in open mode */
cd9288ff 3662 calldata->arg.fmode = 0;
e7616923 3663 if (state->n_rdwr == 0) {
cd9288ff
TM		 3664 if (state->n_rdonly == 0)
3665 call_close |= is_rdonly;
3666 else if (is_rdonly)
3667 calldata->arg.fmode |= FMODE_READ;
3668 if (state->n_wronly == 0)
3669 call_close |= is_wronly;
3670 else if (is_wronly)
3671 calldata->arg.fmode |= FMODE_WRITE;
e547f262
TM		 3672 if (calldata->arg.fmode != (FMODE_READ|FMODE_WRITE))
3673 call_close |= is_rdwr;
cd9288ff
TM		 3674 } else if (is_rdwr)
3675 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
3676
0e0cb35b
TM		 3677 nfs4_sync_open_stateid(&calldata->arg.stateid, state);
3678 if (!nfs4_valid_open_stateid(state))
5d422301 3679 call_close = 0;
4cecb76f 3680 spin_unlock(&state->owner->so_lock);
88069f77
TM		 3681
3682 if (!call_close) {
963d8fe5 3683 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 3684 goto out_no_action;
9512135d 3685 }
88069f77 3686
1c5bd76d 3687 if (!calldata->lr.roc && nfs4_wait_on_layoutreturn(inode, task)) {
500d701f
PT		 3688 nfs_release_seqid(calldata->arg.seqid);
3689 goto out_wait;
3690 }
3691
c8bf7073
TM		 3692 lo = calldata->arg.lr_args ? calldata->arg.lr_args->layout : NULL;
3693 if (lo && !pnfs_layout_is_valid(lo)) {
3694 calldata->arg.lr_args = NULL;
3695 calldata->res.lr_res = NULL;
3696 }
3697
9413a1a1 3698 if (calldata->arg.fmode == 0)
88069f77 3699 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
3ecefc92 3700
9413a1a1 3701 if (calldata->arg.fmode == 0 || calldata->arg.fmode == FMODE_READ) {
3ecefc92 3702 /* Close-to-open cache consistency revalidation */
76bd5c01 3703 if (!nfs4_have_delegation(inode, FMODE_READ)) {
332d1a03
TM		 3704 nfs4_bitmask_set(calldata->arg.bitmask_store,
3705 server->cache_consistency_bitmask,
85847280 3706 inode, 0);
332d1a03 3707 calldata->arg.bitmask = calldata->arg.bitmask_store;
76bd5c01 3708 } else
3ecefc92
TM		 3709 calldata->arg.bitmask = NULL;
3710 }
3c13cb5b 3711
6ae37339
TM		 3712 calldata->arg.share_access =
3713 nfs4_map_atomic_open_share(NFS_SERVER(inode),
3714 calldata->arg.fmode, 0);
88069f77 3715
d8d84983
TM		 3716 if (calldata->res.fattr == NULL)
3717 calldata->arg.bitmask = NULL;
3718 else if (calldata->arg.bitmask == NULL)
3719 calldata->res.fattr = NULL;
26e976a8 3720 calldata->timestamp = jiffies;
42e1cca7 3721 if (nfs4_setup_sequence(NFS_SERVER(inode)->nfs_client,
9d12b216
TM		 3722 &calldata->arg.seq_args,
3723 &calldata->res.seq_res,
2240a9e2
TM		 3724 task) != 0)
3725 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 3726 return;
3727out_no_action:
3728 task->tk_action = NULL;
3729out_wait:
3730 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 3731}
3732
963d8fe5 3733static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 3734 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 3735 .rpc_call_done = nfs4_close_done,
3736 .rpc_release = nfs4_free_closedata,
3737};
3738
1da177e4
LT		 3739/*
3740 * It is possible for data to be read/written from a mem-mapped file
3741 * after the sys_close call (which hits the vfs layer as a flush).
3742 * This means that we can't safely call nfsv4 close on a file until
3743 * the inode is cleared. This in turn means that we are not good
3744 * NFSv4 citizens - we do not indicate to the server to update the file's
3745 * share state even when we are done with one of the three share
3746 * stateid's in the inode.
3747 *
3748 * NOTE: Caller must be holding the sp->so_owner semaphore!
3749 */
1f7977c1 3750int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 3751{
4a35bd41 3752 struct nfs_server *server = NFS_SERVER(state->inode);
63f5f796 3753 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
1da177e4 3754 struct nfs4_closedata *calldata;
b39e625b
TM		 3755 struct nfs4_state_owner *sp = state->owner;
3756 struct rpc_task *task;
5138fde0
TM		 3757 struct rpc_message msg = {
3758 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
3759 .rpc_cred = state->owner->so_cred,
3760 };
c970aa85
TM		 3761 struct rpc_task_setup task_setup_data = {
3762 .rpc_client = server->client,
5138fde0 3763 .rpc_message = &msg,
c970aa85 3764 .callback_ops = &nfs4_close_ops,
101070ca 3765 .workqueue = nfsiod_workqueue,
61296507 3766 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF,
c970aa85 3767 };
9512135d 3768 int status = -ENOMEM;
1da177e4 3769
118f09ed 3770 if (nfs_server_capable(state->inode, NFS_CAP_MOVEABLE))
85e39fee
OK		 3771 task_setup_data.flags |= RPC_TASK_MOVEABLE;
3772
fa940720
WAA		 3773 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
3774 &task_setup_data.rpc_client, &msg);
3775
8535b2be 3776 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 3777 if (calldata == NULL)
9512135d 3778 goto out;
fba83f34 3779 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1, 0);
4a35bd41 3780 calldata->inode = state->inode;
1da177e4 3781 calldata->state = state;
4a35bd41 3782 calldata->arg.fh = NFS_FH(state->inode);
c82bac6f
TM		 3783 if (!nfs4_copy_open_stateid(&calldata->arg.stateid, state))
3784 goto out_free_calldata;
1da177e4 3785 /* Serialization for the sequence id */
63f5f796
TM		 3786 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
3787 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask);
badc76dd 3788 if (IS_ERR(calldata->arg.seqid))
9512135d 3789 goto out_free_calldata;
d8d84983 3790 nfs_fattr_init(&calldata->fattr);
dc0b027d 3791 calldata->arg.fmode = 0;
4d796d75 3792 calldata->lr.arg.ld_private = &calldata->lr.ld_private;
516a6af6 3793 calldata->res.fattr = &calldata->fattr;
c1d51931 3794 calldata->res.seqid = calldata->arg.seqid;
516a6af6 3795 calldata->res.server = server;
cf805165 3796 calldata->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
1c5bd76d
TM		 3797 calldata->lr.roc = pnfs_roc(state->inode,
3798 &calldata->lr.arg, &calldata->lr.res, msg.rpc_cred);
3799 if (calldata->lr.roc) {
3800 calldata->arg.lr_args = &calldata->lr.arg;
3801 calldata->res.lr_res = &calldata->lr.res;
3802 }
643168c2 3803 nfs_sb_active(calldata->inode->i_sb);
9512135d 3804
1174dd1f
TM		 3805 msg.rpc_argp = &calldata->arg;
3806 msg.rpc_resp = &calldata->res;
c970aa85
TM		 3807 task_setup_data.callback_data = calldata;
3808 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 3809 if (IS_ERR(task))
3810 return PTR_ERR(task);
a49c3c77
TM		 3811 status = 0;
3812 if (wait)
3813 status = rpc_wait_for_completion_task(task);
b39e625b 3814 rpc_put_task(task);
a49c3c77 3815 return status;
9512135d
TM		 3816out_free_calldata:
3817 kfree(calldata);
3818out:
b39e625b
TM		 3819 nfs4_put_open_state(state);
3820 nfs4_put_state_owner(sp);
9512135d 3821 return status;
1da177e4
LT		 3822}
3823
2b484297 3824static struct inode *
5bc2afc2
TM		 3825nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
3826 int open_flags, struct iattr *attr, int *opened)
1da177e4 3827{
1da177e4 3828 struct nfs4_state *state;
c528f70f 3829 struct nfs4_label l, *label;
aa9c2669
DQ		 3830
3831 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
1da177e4 3832
565277f6 3833 /* Protect against concurrent sillydeletes */
5bc2afc2 3834 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
aa9c2669
DQ		 3835
3836 nfs4_label_release_security(label);
3837
f46e0bd3
TM		 3838 if (IS_ERR(state))
3839 return ERR_CAST(state);
275bb307 3840 return state->inode;
1da177e4
LT		 3841}
3842
1185a552 3843static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 3844{
3845 if (ctx->state == NULL)
3846 return;
3847 if (is_sync)
1bf85d8c 3848 nfs4_close_sync(ctx->state, _nfs4_ctx_to_openmode(ctx));
7fe5c398 3849 else
1bf85d8c 3850 nfs4_close_state(ctx->state, _nfs4_ctx_to_openmode(ctx));
7fe5c398 3851}
1da177e4 3852
b944dba3
TM		 3853#define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
3854#define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
b78ef845 3855#define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_XATTR_SUPPORT - 1UL)
b944dba3 3856
1da177e4
LT		 3857static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
3858{
8c61282f 3859 u32 bitmask[3] = {}, minorversion = server->nfs_client->cl_minorversion;
43652ad5
BH		 3860 struct nfs4_server_caps_arg args = {
3861 .fhandle = fhandle,
8c61282f 3862 .bitmask = bitmask,
43652ad5 3863 };
1da177e4
LT		 3864 struct nfs4_server_caps_res res = {};
3865 struct rpc_message msg = {
3866 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 3867 .rpc_argp = &args,
1da177e4
LT		 3868 .rpc_resp = &res,
3869 };
3870 int status;
f4b23de3 3871 int i;
1da177e4 3872
8c61282f
KM		 3873 bitmask[0] = FATTR4_WORD0_SUPPORTED_ATTRS |
3874 FATTR4_WORD0_FH_EXPIRE_TYPE |
3875 FATTR4_WORD0_LINK_SUPPORT |
3876 FATTR4_WORD0_SYMLINK_SUPPORT |
1ab5be4a
TM		 3877 FATTR4_WORD0_ACLSUPPORT |
3878 FATTR4_WORD0_CASE_INSENSITIVE |
3879 FATTR4_WORD0_CASE_PRESERVING;
8c61282f
KM		 3880 if (minorversion)
3881 bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3882
7c513058 3883 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3884 if (status == 0) {
b944dba3 3885 /* Sanity check the server answers */
8c61282f 3886 switch (minorversion) {
b944dba3
TM		 3887 case 0:
3888 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
3889 res.attr_bitmask[2] = 0;
3890 break;
3891 case 1:
3892 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
3893 break;
3894 case 2:
3895 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
3896 }
1da177e4 3897 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
ce62b114
TM		 3898 server->caps &= ~(NFS_CAP_ACLS | NFS_CAP_HARDLINKS |
3899 NFS_CAP_SYMLINKS| NFS_CAP_SECURITY_LABEL);
3900 server->fattr_valid = NFS_ATTR_FATTR_V4;
7dd7d959
MN		 3901 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
3902 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
1da177e4
LT		 3903 server->caps |= NFS_CAP_ACLS;
3904 if (res.has_links != 0)
3905 server->caps |= NFS_CAP_HARDLINKS;
3906 if (res.has_symlinks != 0)
3907 server->caps |= NFS_CAP_SYMLINKS;
1ab5be4a
TM		 3908 if (res.case_insensitive)
3909 server->caps |= NFS_CAP_CASE_INSENSITIVE;
3910 if (res.case_preserving)
3911 server->caps |= NFS_CAP_CASE_PRESERVING;
0b4f132b
SM		 3912#ifdef CONFIG_NFS_V4_SECURITY_LABEL
3913 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
3914 server->caps |= NFS_CAP_SECURITY_LABEL;
3915#endif
8a59bb93
OK		 3916 if (res.attr_bitmask[0] & FATTR4_WORD0_FS_LOCATIONS)
3917 server->caps |= NFS_CAP_FS_LOCATIONS;
ce62b114
TM		 3918 if (!(res.attr_bitmask[0] & FATTR4_WORD0_FILEID))
3919 server->fattr_valid &= ~NFS_ATTR_FATTR_FILEID;
3920 if (!(res.attr_bitmask[1] & FATTR4_WORD1_MODE))
3921 server->fattr_valid &= ~NFS_ATTR_FATTR_MODE;
3922 if (!(res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS))
3923 server->fattr_valid &= ~NFS_ATTR_FATTR_NLINK;
3924 if (!(res.attr_bitmask[1] & FATTR4_WORD1_OWNER))
3925 server->fattr_valid &= ~(NFS_ATTR_FATTR_OWNER |
3926 NFS_ATTR_FATTR_OWNER_NAME);
3927 if (!(res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP))
3928 server->fattr_valid &= ~(NFS_ATTR_FATTR_GROUP |
3929 NFS_ATTR_FATTR_GROUP_NAME);
3930 if (!(res.attr_bitmask[1] & FATTR4_WORD1_SPACE_USED))
3931 server->fattr_valid &= ~NFS_ATTR_FATTR_SPACE_USED;
3932 if (!(res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS))
3933 server->fattr_valid &= ~NFS_ATTR_FATTR_ATIME;
3934 if (!(res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA))
3935 server->fattr_valid &= ~NFS_ATTR_FATTR_CTIME;
3936 if (!(res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY))
3937 server->fattr_valid &= ~NFS_ATTR_FATTR_MTIME;
aa9c2669
DQ		 3938 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
3939 sizeof(server->attr_bitmask));
b944dba3 3940 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
62ab460c 3941
a65318bf
TM		 3942 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
3943 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
3944 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
b944dba3 3945 server->cache_consistency_bitmask[2] = 0;
f4b23de3
TM		 3946
3947 /* Avoid a regression due to buggy server */
3948 for (i = 0; i < ARRAY_SIZE(res.exclcreat_bitmask); i++)
3949 res.exclcreat_bitmask[i] &= res.attr_bitmask[i];
8c61282f
KM		 3950 memcpy(server->exclcreat_bitmask, res.exclcreat_bitmask,
3951 sizeof(server->exclcreat_bitmask));
f4b23de3 3952
1da177e4 3953 server->acl_bitmask = res.acl_bitmask;
264e6351 3954 server->fh_expire_type = res.fh_expire_type;
1da177e4 3955 }
cccef3b9 3956
1da177e4
LT		 3957 return status;
3958}
3959
55a97593 3960int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4 3961{
0688e64b
TM		 3962 struct nfs4_exception exception = {
3963 .interruptible = true,
3964 };
1da177e4 3965 int err;
01dde76e
AS		 3966
3967 nfs4_server_set_init_caps(server);
1da177e4
LT		 3968 do {
3969 err = nfs4_handle_exception(server,
3970 _nfs4_server_capabilities(server, fhandle),
3971 &exception);
3972 } while (exception.retry);
3973 return err;
3974}
3975
4ca9f31a
OK		 3976static void test_fs_location_for_trunking(struct nfs4_fs_location *location,
3977 struct nfs_client *clp,
3978 struct nfs_server *server)
3979{
3980 int i;
3981
3982 for (i = 0; i < location->nservers; i++) {
3983 struct nfs4_string *srv_loc = &location->servers[i];
cf0d7e7f 3984 struct sockaddr_storage addr;
4ca9f31a
OK		 3985 size_t addrlen;
3986 struct xprt_create xprt_args = {
3987 .ident = 0,
3988 .net = clp->cl_net,
3989 };
3990 struct nfs4_add_xprt_data xprtdata = {
3991 .clp = clp,
3992 };
3993 struct rpc_add_xprt_test rpcdata = {
3994 .add_xprt_test = clp->cl_mvops->session_trunk,
3995 .data = &xprtdata,
3996 };
3997 char *servername = NULL;
3998
3999 if (!srv_loc->len)
4000 continue;
4001
4002 addrlen = nfs_parse_server_name(srv_loc->data, srv_loc->len,
4003 &addr, sizeof(addr),
4004 clp->cl_net, server->port);
4005 if (!addrlen)
4006 return;
cf0d7e7f 4007 xprt_args.dstaddr = (struct sockaddr *)&addr;
4ca9f31a
OK		 4008 xprt_args.addrlen = addrlen;
4009 servername = kmalloc(srv_loc->len + 1, GFP_KERNEL);
4010 if (!servername)
4011 return;
4012 memcpy(servername, srv_loc->data, srv_loc->len);
4013 servername[srv_loc->len] = '\0';
4014 xprt_args.servername = servername;
4015
4016 xprtdata.cred = nfs4_get_clid_cred(clp);
4017 rpc_clnt_add_xprt(clp->cl_rpcclient, &xprt_args,
4018 rpc_clnt_setup_test_and_add_xprt,
4019 &rpcdata);
4020 if (xprtdata.cred)
4021 put_cred(xprtdata.cred);
4022 kfree(servername);
4023 }
4024}
4025
1976b2b3
OK		 4026static int _nfs4_discover_trunking(struct nfs_server *server,
4027 struct nfs_fh *fhandle)
4028{
4029 struct nfs4_fs_locations *locations = NULL;
4030 struct page *page;
4031 const struct cred *cred;
4032 struct nfs_client *clp = server->nfs_client;
4033 const struct nfs4_state_maintenance_ops *ops =
4034 clp->cl_mvops->state_renewal_ops;
4ca9f31a 4035 int status = -ENOMEM, i;
1976b2b3
OK		 4036
4037 cred = ops->get_state_renewal_cred(clp);
4038 if (cred == NULL) {
4039 cred = nfs4_get_clid_cred(clp);
4040 if (cred == NULL)
4041 return -ENOKEY;
4042 }
4043
4044 page = alloc_page(GFP_KERNEL);
4f40a5b5 4045 if (!page)
e83458fc 4046 goto out_put_cred;
1976b2b3 4047 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
4f40a5b5
SM		 4048 if (!locations)
4049 goto out_free;
4050 locations->fattr = nfs_alloc_fattr();
4051 if (!locations->fattr)
4052 goto out_free_2;
1976b2b3
OK		 4053
4054 status = nfs4_proc_get_locations(server, fhandle, locations, page,
4055 cred);
4056 if (status)
4f40a5b5 4057 goto out_free_3;
4ca9f31a
OK		 4058
4059 for (i = 0; i < locations->nlocations; i++)
4060 test_fs_location_for_trunking(&locations->locations[i], clp,
4061 server);
4f40a5b5
SM		 4062out_free_3:
4063 kfree(locations->fattr);
4064out_free_2:
1976b2b3 4065 kfree(locations);
4f40a5b5
SM		 4066out_free:
4067 __free_page(page);
e83458fc
TM		 4068out_put_cred:
4069 put_cred(cred);
1976b2b3
OK		 4070 return status;
4071}
4072
4073static int nfs4_discover_trunking(struct nfs_server *server,
4074 struct nfs_fh *fhandle)
4075{
4076 struct nfs4_exception exception = {
4077 .interruptible = true,
4078 };
4079 struct nfs_client *clp = server->nfs_client;
4080 int err = 0;
4081
4082 if (!nfs4_has_session(clp))
4083 goto out;
4084 do {
4085 err = nfs4_handle_exception(server,
4086 _nfs4_discover_trunking(server, fhandle),
4087 &exception);
4088 } while (exception.retry);
4089out:
4090 return err;
4091}
4092
1da177e4
LT		 4093static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
4094 struct nfs_fsinfo *info)
4095{
aa9c2669 4096 u32 bitmask[3];
1da177e4 4097 struct nfs4_lookup_root_arg args = {
aa9c2669 4098 .bitmask = bitmask,
1da177e4
LT		 4099 };
4100 struct nfs4_lookup_res res = {
4101 .server = server,
0e574af1 4102 .fattr = info->fattr,
1da177e4
LT		 4103 .fh = fhandle,
4104 };
4105 struct rpc_message msg = {
4106 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
4107 .rpc_argp = &args,
4108 .rpc_resp = &res,
4109 };
008f55d0 4110
aa9c2669
DQ		 4111 bitmask[0] = nfs4_fattr_bitmap[0];
4112 bitmask[1] = nfs4_fattr_bitmap[1];
4113 /*
4114 * Process the label in the upcoming getfattr
4115 */
4116 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
4117
0e574af1 4118 nfs_fattr_init(info->fattr);
7c513058 4119 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4120}
4121
4122static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
4123 struct nfs_fsinfo *info)
4124{
0688e64b
TM		 4125 struct nfs4_exception exception = {
4126 .interruptible = true,
4127 };
1da177e4
LT		 4128 int err;
4129 do {
fb8a5ba8 4130 err = _nfs4_lookup_root(server, fhandle, info);
b5f875a9 4131 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
fb8a5ba8
BS		 4132 switch (err) {
4133 case 0:
4134 case -NFS4ERR_WRONGSEC:
05e9cfb4 4135 goto out;
fb8a5ba8
BS		 4136 default:
4137 err = nfs4_handle_exception(server, err, &exception);
4138 }
1da177e4 4139 } while (exception.retry);
05e9cfb4 4140out:
1da177e4
LT		 4141 return err;
4142}
4143
8f70e95f
BS		 4144static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
4145 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
4146{
c2190661
TM		 4147 struct rpc_auth_create_args auth_args = {
4148 .pseudoflavor = flavor,
4149 };
8f70e95f 4150 struct rpc_auth *auth;
8f70e95f 4151
c2190661 4152 auth = rpcauth_create(&auth_args, server->client);
9df1336c
AS		 4153 if (IS_ERR(auth))
4154 return -EACCES;
4155 return nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 4156}
4157
9a744ba3
CL		 4158/*
4159 * Retry pseudoroot lookup with various security flavors. We do this when:
4160 *
4161 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
4162 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
4163 *
4164 * Returns zero on success, or a negative NFS4ERR value, or a
4165 * negative errno value.
4166 */
801a16dc 4167static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 4168 struct nfs_fsinfo *info)
1da177e4 4169{
9a744ba3
CL		 4170 /* Per 3530bis 15.33.5 */
4171 static const rpc_authflavor_t flav_array[] = {
4172 RPC_AUTH_GSS_KRB5P,
4173 RPC_AUTH_GSS_KRB5I,
4174 RPC_AUTH_GSS_KRB5,
c4eafe11 4175 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 4176 RPC_AUTH_NULL,
4177 };
4178 int status = -EPERM;
4179 size_t i;
6a1a1e34 4180
4d4b69dd
WAA		 4181 if (server->auth_info.flavor_len > 0) {
4182 /* try each flavor specified by user */
4183 for (i = 0; i < server->auth_info.flavor_len; i++) {
4184 status = nfs4_lookup_root_sec(server, fhandle, info,
4185 server->auth_info.flavors[i]);
4186 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
4187 continue;
4188 break;
4189 }
4190 } else {
4191 /* no flavors specified by user, try default list */
4192 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
4193 status = nfs4_lookup_root_sec(server, fhandle, info,
4194 flav_array[i]);
4195 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
4196 continue;
4197 break;
4198 }
8f70e95f 4199 }
9a744ba3 4200
fb8a5ba8 4201 /*
d3787af2 4202 * -EACCES could mean that the user doesn't have correct permissions
fb8a5ba8
BS		 4203 * to access the mount. It could also mean that we tried to mount
4204 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
4205 * existing mount programs don't handle -EACCES very well so it should
4206 * be mapped to -EPERM instead.
4207 */
4208 if (status == -EACCES)
4209 status = -EPERM;
801a16dc
BS		 4210 return status;
4211}
4212
2ed4b95b
CL		 4213/**
4214 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
4215 * @server: initialized nfs_server handle
4216 * @fhandle: we fill in the pseudo-fs root file handle
4217 * @info: we fill in an FSINFO struct
5e6b1990 4218 * @auth_probe: probe the auth flavours
2ed4b95b
CL		 4219 *
4220 * Returns zero on success, or a negative errno.
801a16dc 4221 */
3028eb2b 4222int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
5e6b1990
TM		 4223 struct nfs_fsinfo *info,
4224 bool auth_probe)
801a16dc 4225{
c7757074 4226 int status = 0;
2ed4b95b 4227
c7757074 4228 if (!auth_probe)
5e6b1990 4229 status = nfs4_lookup_root(server, fhandle, info);
c7757074
AP		 4230
4231 if (auth_probe || status == NFS4ERR_WRONGSEC)
698c937b
TM		 4232 status = server->nfs_client->cl_mvops->find_root_sec(server,
4233 fhandle, info);
2ed4b95b 4234
1da177e4
LT		 4235 if (status == 0)
4236 status = nfs4_server_capabilities(server, fhandle);
4237 if (status == 0)
4238 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 4239
c12e87f4 4240 return nfs4_map_errors(status);
1da177e4
LT		 4241}
4242
bae36241
BS		 4243static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
4244 struct nfs_fsinfo *info)
4245{
4246 int error;
4247 struct nfs_fattr *fattr = info->fattr;
4248
4249 error = nfs4_server_capabilities(server, mntfh);
4250 if (error < 0) {
4251 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
4252 return error;
4253 }
4254
2ef61e0e 4255 error = nfs4_proc_getattr(server, mntfh, fattr, NULL);
bae36241
BS		 4256 if (error < 0) {
4257 dprintk("nfs4_get_root: getattr error = %d\n", -error);
779df6a5 4258 goto out;
bae36241
BS		 4259 }
4260
4261 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
4262 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
4263 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
4264
779df6a5 4265out:
bae36241
BS		 4266 return error;
4267}
4268
6b97fd3d
MN		 4269/*
4270 * Get locations and (maybe) other attributes of a referral.
4271 * Note that we'll actually follow the referral later when
4272 * we detect fsid mismatch in inode revalidation
4273 */
f05d147f
BS		 4274static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
4275 const struct qstr *name, struct nfs_fattr *fattr,
4276 struct nfs_fh *fhandle)
6b97fd3d
MN		 4277{
4278 int status = -ENOMEM;
4279 struct page *page = NULL;
4280 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 4281
4282 page = alloc_page(GFP_KERNEL);
4283 if (page == NULL)
4284 goto out;
4285 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
4286 if (locations == NULL)
4287 goto out;
4288
c3ed2227
BC		 4289 locations->fattr = fattr;
4290
f05d147f 4291 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 4292 if (status != 0)
4293 goto out;
519ae255
CL		 4294
4295 /*
4296 * If the fsid didn't change, this is a migration event, not a
4297 * referral. Cause us to drop into the exception handler, which
4298 * will kick off migration recovery.
4299 */
c3ed2227 4300 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &fattr->fsid)) {
533eb461
AA		 4301 dprintk("%s: server did not return a different fsid for"
4302 " a referral at %s\n", __func__, name->name);
519ae255 4303 status = -NFS4ERR_MOVED;
6b97fd3d
MN		 4304 goto out;
4305 }
533eb461 4306 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
c3ed2227 4307 nfs_fixup_referral_attributes(fattr);
6b97fd3d
MN		 4308 memset(fhandle, 0, sizeof(struct nfs_fh));
4309out:
4310 if (page)
4311 __free_page(page);
5d7ca35a 4312 kfree(locations);
6b97fd3d
MN		 4313 return status;
4314}
4315
1775fd3e 4316static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
2ef61e0e 4317 struct nfs_fattr *fattr, struct inode *inode)
1da177e4 4318{
771734f2 4319 __u32 bitmask[NFS4_BITMASK_SZ];
1da177e4
LT		 4320 struct nfs4_getattr_arg args = {
4321 .fh = fhandle,
771734f2 4322 .bitmask = bitmask,
1da177e4
LT		 4323 };
4324 struct nfs4_getattr_res res = {
4325 .fattr = fattr,
4326 .server = server,
4327 };
4328 struct rpc_message msg = {
4329 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
4330 .rpc_argp = &args,
4331 .rpc_resp = &res,
4332 };
c74dfe97
TM		 4333 unsigned short task_flags = 0;
4334
85e39fee
OK		 4335 if (nfs4_has_session(server->nfs_client))
4336 task_flags = RPC_TASK_MOVEABLE;
4337
c74dfe97
TM		 4338 /* Is this is an attribute revalidation, subject to softreval? */
4339 if (inode && (server->flags & NFS_MOUNT_SOFTREVAL))
4340 task_flags |= RPC_TASK_TIMEOUT;
aa9c2669 4341
2ef61e0e 4342 nfs4_bitmap_copy_adjust(bitmask, nfs4_bitmask(server, fattr->label), inode, 0);
0e574af1 4343 nfs_fattr_init(fattr);
c74dfe97
TM		 4344 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0);
4345 return nfs4_do_call_sync(server->client, server, &msg,
4346 &args.seq_args, &res.seq_res, task_flags);
1da177e4
LT		 4347}
4348
ec4b0925 4349int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
2ef61e0e 4350 struct nfs_fattr *fattr, struct inode *inode)
1da177e4 4351{
0688e64b
TM		 4352 struct nfs4_exception exception = {
4353 .interruptible = true,
4354 };
1da177e4
LT		 4355 int err;
4356 do {
2ef61e0e 4357 err = _nfs4_proc_getattr(server, fhandle, fattr, inode);
b5f875a9
TM		 4358 trace_nfs4_getattr(server, fhandle, fattr, err);
4359 err = nfs4_handle_exception(server, err,
1da177e4
LT		 4360 &exception);
4361 } while (exception.retry);
4362 return err;
4363}
4364
4365/*
4366 * The file is not closed if it is opened due to the a request to change
4367 * the size of the file. The open call will not be needed once the
4368 * VFS layer lookup-intents are implemented.
4369 *
4370 * Close is called when the inode is destroyed.
4371 * If we haven't opened the file for O_WRONLY, we
4372 * need to in the size_change case to obtain a stateid.
4373 *
4374 * Got race?
4375 * Because OPEN is always done by name in nfsv4, it is
4376 * possible that we opened a different file by the same
4377 * name. We can recognize this race condition, but we
4378 * can't do anything about it besides returning an error.
4379 *
4380 * This will be fixed with VFS changes (lookup-intent).
4381 */
4382static int
4383nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
4384 struct iattr *sattr)
4385{
2b0143b5 4386 struct inode *inode = d_inode(dentry);
a52458b4 4387 const struct cred *cred = NULL;
29b59f94 4388 struct nfs_open_context *ctx = NULL;
1da177e4
LT		 4389 int status;
4390
88ac815c
PT		 4391 if (pnfs_ld_layoutret_on_setattr(inode) &&
4392 sattr->ia_valid & ATTR_SIZE &&
4393 sattr->ia_size < i_size_read(inode))
24028672 4394 pnfs_commit_and_return_layout(inode);
8a1636c4 4395
0e574af1 4396 nfs_fattr_init(fattr);
1da177e4 4397
2669940d
AA		 4398 /* Deal with open(O_TRUNC) */
4399 if (sattr->ia_valid & ATTR_OPEN)
cc7936f9 4400 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2669940d
AA		 4401
4402 /* Optimization: if the end result is no change, don't RPC */
cc7936f9 4403 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2669940d
AA		 4404 return 0;
4405
d530838b 4406 /* Search for an existing open(O_WRITE) file */
659bfcd6 4407 if (sattr->ia_valid & ATTR_FILE) {
659bfcd6
TM		 4408
4409 ctx = nfs_file_open_context(sattr->ia_file);
29b59f94 4410 if (ctx)
504e5189 4411 cred = ctx->cred;
659bfcd6 4412 }
08e9eac4 4413
199366f0
TM		 4414 /* Return any delegations if we're going to change ACLs */
4415 if ((sattr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0)
c01d3645 4416 nfs4_inode_make_writeable(inode);
199366f0 4417
1b00ad65 4418 status = nfs4_do_setattr(inode, cred, fattr, sattr, ctx, NULL);
aa9c2669 4419 if (status == 0) {
f044636d 4420 nfs_setattr_update_inode(inode, sattr, fattr);
dd225cb3 4421 nfs_setsecurity(inode, fattr);
aa9c2669 4422 }
1da177e4
LT		 4423 return status;
4424}
4425
0c2e53f1 4426static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
f7b37b8b 4427 struct dentry *dentry, struct nfs_fh *fhandle,
9558a007 4428 struct nfs_fattr *fattr)
2b3de441 4429{
0c2e53f1 4430 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 4431 int status;
4432 struct nfs4_lookup_arg args = {
4433 .bitmask = server->attr_bitmask,
0c2e53f1 4434 .dir_fh = NFS_FH(dir),
f7b37b8b 4435 .name = &dentry->d_name,
2b3de441
DH		 4436 };
4437 struct nfs4_lookup_res res = {
4438 .server = server,
4439 .fattr = fattr,
4440 .fh = fhandle,
4441 };
4442 struct rpc_message msg = {
4443 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
4444 .rpc_argp = &args,
4445 .rpc_resp = &res,
4446 };
f7b37b8b
TM		 4447 unsigned short task_flags = 0;
4448
118f09ed 4449 if (nfs_server_capable(dir, NFS_CAP_MOVEABLE))
85e39fee
OK		 4450 task_flags = RPC_TASK_MOVEABLE;
4451
f7b37b8b
TM		 4452 /* Is this is an attribute revalidation, subject to softreval? */
4453 if (nfs_lookup_is_soft_revalidate(dentry))
4454 task_flags |= RPC_TASK_TIMEOUT;
2b3de441 4455
9558a007 4456 args.bitmask = nfs4_bitmask(server, fattr->label);
aa9c2669 4457
2b3de441
DH		 4458 nfs_fattr_init(fattr);
4459
f7b37b8b
TM		 4460 dprintk("NFS call lookup %pd2\n", dentry);
4461 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0);
4462 status = nfs4_do_call_sync(clnt, server, &msg,
4463 &args.seq_args, &res.seq_res, task_flags);
1da177e4
LT		 4464 dprintk("NFS reply lookup: %d\n", status);
4465 return status;
4466}
4467
72de53ec 4468static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 4469{
7ebb9315 4470 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 4471 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 4472 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4473 fattr->nlink = 2;
4474}
4475
72de53ec 4476static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
f7b37b8b 4477 struct dentry *dentry, struct nfs_fh *fhandle,
9558a007 4478 struct nfs_fattr *fattr)
1da177e4 4479{
0688e64b
TM		 4480 struct nfs4_exception exception = {
4481 .interruptible = true,
4482 };
72de53ec 4483 struct rpc_clnt *client = *clnt;
f7b37b8b 4484 const struct qstr *name = &dentry->d_name;
1da177e4
LT		 4485 int err;
4486 do {
9558a007 4487 err = _nfs4_proc_lookup(client, dir, dentry, fhandle, fattr);
078ea3df 4488 trace_nfs4_lookup(dir, name, err);
72de53ec 4489 switch (err) {
08ef7bd3 4490 case -NFS4ERR_BADNAME:
72de53ec
BS		 4491 err = -ENOENT;
4492 goto out;
0c2e53f1 4493 case -NFS4ERR_MOVED:
f05d147f 4494 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
c86c90c6
DM		 4495 if (err == -NFS4ERR_MOVED)
4496 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
72de53ec 4497 goto out;
0c2e53f1 4498 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 4499 err = -EPERM;
4500 if (client != *clnt)
4501 goto out;
66b06860 4502 client = nfs4_negotiate_security(client, dir, name);
72de53ec
BS		 4503 if (IS_ERR(client))
4504 return PTR_ERR(client);
4505
4506 exception.retry = 1;
4507 break;
4508 default:
4509 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 4510 }
1da177e4 4511 } while (exception.retry);
72de53ec
BS		 4512
4513out:
4514 if (err == 0)
4515 *clnt = client;
4516 else if (client != *clnt)
4517 rpc_shutdown_client(client);
4518
1da177e4
LT		 4519 return err;
4520}
4521
f7b37b8b 4522static int nfs4_proc_lookup(struct inode *dir, struct dentry *dentry,
9558a007 4523 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
72de53ec
BS		 4524{
4525 int status;
4526 struct rpc_clnt *client = NFS_CLIENT(dir);
4527
9558a007 4528 status = nfs4_proc_lookup_common(&client, dir, dentry, fhandle, fattr);
72de53ec
BS		 4529 if (client != NFS_CLIENT(dir)) {
4530 rpc_shutdown_client(client);
4531 nfs_fixup_secinfo_attributes(fattr);
4532 }
4533 return status;
4534}
4535
f05d147f 4536struct rpc_clnt *
f7b37b8b 4537nfs4_proc_lookup_mountpoint(struct inode *dir, struct dentry *dentry,
f05d147f
BS		 4538 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
4539{
b72888cb 4540 struct rpc_clnt *client = NFS_CLIENT(dir);
f05d147f 4541 int status;
f05d147f 4542
9558a007 4543 status = nfs4_proc_lookup_common(&client, dir, dentry, fhandle, fattr);
b72888cb 4544 if (status < 0)
f05d147f 4545 return ERR_PTR(status);
b72888cb 4546 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
f05d147f
BS		 4547}
4548
5b5faaf6 4549static int _nfs4_proc_lookupp(struct inode *inode,
ba4bc8dc 4550 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
5b5faaf6
JL		 4551{
4552 struct rpc_clnt *clnt = NFS_CLIENT(inode);
4553 struct nfs_server *server = NFS_SERVER(inode);
4554 int status;
4555 struct nfs4_lookupp_arg args = {
4556 .bitmask = server->attr_bitmask,
4557 .fh = NFS_FH(inode),
4558 };
4559 struct nfs4_lookupp_res res = {
4560 .server = server,
4561 .fattr = fattr,
5b5faaf6
JL		 4562 .fh = fhandle,
4563 };
4564 struct rpc_message msg = {
4565 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUPP],
4566 .rpc_argp = &args,
4567 .rpc_resp = &res,
4568 };
76998ebb
TM		 4569 unsigned short task_flags = 0;
4570
4571 if (NFS_SERVER(inode)->flags & NFS_MOUNT_SOFTREVAL)
4572 task_flags |= RPC_TASK_TIMEOUT;
5b5faaf6 4573
ba4bc8dc 4574 args.bitmask = nfs4_bitmask(server, fattr->label);
5b5faaf6
JL		 4575
4576 nfs_fattr_init(fattr);
4577
4578 dprintk("NFS call lookupp ino=0x%lx\n", inode->i_ino);
4579 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
76998ebb 4580 &res.seq_res, task_flags);
5b5faaf6
JL		 4581 dprintk("NFS reply lookupp: %d\n", status);
4582 return status;
4583}
4584
4585static int nfs4_proc_lookupp(struct inode *inode, struct nfs_fh *fhandle,
ba4bc8dc 4586 struct nfs_fattr *fattr)
5b5faaf6 4587{
0688e64b
TM		 4588 struct nfs4_exception exception = {
4589 .interruptible = true,
4590 };
5b5faaf6
JL		 4591 int err;
4592 do {
ba4bc8dc 4593 err = _nfs4_proc_lookupp(inode, fhandle, fattr);
5b5faaf6
JL		 4594 trace_nfs4_lookupp(inode, err);
4595 err = nfs4_handle_exception(NFS_SERVER(inode), err,
4596 &exception);
4597 } while (exception.retry);
4598 return err;
4599}
4600
73fbb3fa
N		 4601static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry,
4602 const struct cred *cred)
1da177e4 4603{
76b32999 4604 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 4605 struct nfs4_accessargs args = {
4606 .fh = NFS_FH(inode),
1750d929 4607 .access = entry->mask,
76b32999
TM		 4608 };
4609 struct nfs4_accessres res = {
4610 .server = server,
1da177e4 4611 };
1da177e4
LT		 4612 struct rpc_message msg = {
4613 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
4614 .rpc_argp = &args,
4615 .rpc_resp = &res,
73fbb3fa 4616 .rpc_cred = cred,
1da177e4 4617 };
aa9c2669 4618 int status = 0;
1da177e4 4619
7c672654 4620 if (!nfs4_have_delegation(inode, FMODE_READ)) {
8bcbe7d9
TM		 4621 res.fattr = nfs_alloc_fattr();
4622 if (res.fattr == NULL)
4623 return -ENOMEM;
4624 args.bitmask = server->cache_consistency_bitmask;
4625 }
7c513058 4626 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 4627 if (!status) {
6168f62c 4628 nfs_access_set_mask(entry, res.access);
8bcbe7d9
TM		 4629 if (res.fattr)
4630 nfs_refresh_inode(inode, res.fattr);
1da177e4 4631 }
c407d41a 4632 nfs_free_fattr(res.fattr);
1da177e4
LT		 4633 return status;
4634}
4635
73fbb3fa
N		 4636static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry,
4637 const struct cred *cred)
1da177e4 4638{
0688e64b
TM		 4639 struct nfs4_exception exception = {
4640 .interruptible = true,
4641 };
1da177e4
LT		 4642 int err;
4643 do {
73fbb3fa 4644 err = _nfs4_proc_access(inode, entry, cred);
c1578b76
TM		 4645 trace_nfs4_access(inode, err);
4646 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 4647 &exception);
4648 } while (exception.retry);
4649 return err;
4650}
4651
4652/*
4653 * TODO: For the time being, we don't try to get any attributes
4654 * along with any of the zero-copy operations READ, READDIR,
4655 * READLINK, WRITE.
4656 *
4657 * In the case of the first three, we want to put the GETATTR
4658 * after the read-type operation -- this is because it is hard
4659 * to predict the length of a GETATTR response in v4, and thus
4660 * align the READ data correctly. This means that the GETATTR
4661 * may end up partially falling into the page cache, and we should
4662 * shift it into the 'tail' of the xdr_buf before processing.
4663 * To do this efficiently, we need to know the total length
4664 * of data received, which doesn't seem to be available outside
4665 * of the RPC layer.
4666 *
4667 * In the case of WRITE, we also want to put the GETATTR after
4668 * the operation -- in this case because we want to make sure
140150db 4669 * we get the post-operation mtime and size.
1da177e4
LT		 4670 *
4671 * Both of these changes to the XDR layer would in fact be quite
4672 * minor, but I decided to leave them for a subsequent patch.
4673 */
4674static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
4675 unsigned int pgbase, unsigned int pglen)
4676{
4677 struct nfs4_readlink args = {
4678 .fh = NFS_FH(inode),
4679 .pgbase = pgbase,
4680 .pglen = pglen,
4681 .pages = &page,
4682 };
f50c7000 4683 struct nfs4_readlink_res res;
1da177e4
LT		 4684 struct rpc_message msg = {
4685 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
4686 .rpc_argp = &args,
f50c7000 4687 .rpc_resp = &res,
1da177e4
LT		 4688 };
4689
7c513058 4690 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4691}
4692
4693static int nfs4_proc_readlink(struct inode *inode, struct page *page,
4694 unsigned int pgbase, unsigned int pglen)
4695{
0688e64b
TM		 4696 struct nfs4_exception exception = {
4697 .interruptible = true,
4698 };
1da177e4
LT		 4699 int err;
4700 do {
c1578b76
TM		 4701 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
4702 trace_nfs4_readlink(inode, err);
4703 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 4704 &exception);
4705 } while (exception.retry);
4706 return err;
4707}
4708
1da177e4 4709/*
8867fe58 4710 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 4711 */
1da177e4
LT		 4712static int
4713nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 4714 int flags)
1da177e4 4715{
dff25ddb 4716 struct nfs_server *server = NFS_SERVER(dir);
c528f70f 4717 struct nfs4_label l, *ilabel;
8867fe58 4718 struct nfs_open_context *ctx;
1da177e4 4719 struct nfs4_state *state;
1da177e4
LT		 4720 int status = 0;
4721
532d4def 4722 ctx = alloc_nfs_open_context(dentry, FMODE_READ, NULL);
8867fe58
MS		 4723 if (IS_ERR(ctx))
4724 return PTR_ERR(ctx);
4725
aa9c2669
DQ		 4726 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
4727
dff25ddb
AG		 4728 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
4729 sattr->ia_mode &= ~current_umask();
c5c3fb5f 4730 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, NULL);
1da177e4
LT		 4731 if (IS_ERR(state)) {
4732 status = PTR_ERR(state);
c0204fd2 4733 goto out;
1da177e4 4734 }
1da177e4 4735out:
aa9c2669 4736 nfs4_label_release_security(ilabel);
8867fe58 4737 put_nfs_open_context(ctx);
1da177e4
LT		 4738 return status;
4739}
4740
3c591175
TM		 4741static int
4742_nfs4_proc_remove(struct inode *dir, const struct qstr *name, u32 ftype)
1da177e4 4743{
16e42959 4744 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 4745 struct nfs_removeargs args = {
1da177e4 4746 .fh = NFS_FH(dir),
26fe5750 4747 .name = *name,
16e42959 4748 };
4fdc17b2 4749 struct nfs_removeres res = {
16e42959 4750 .server = server,
1da177e4 4751 };
1da177e4 4752 struct rpc_message msg = {
4fdc17b2
TM		 4753 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
4754 .rpc_argp = &args,
4755 .rpc_resp = &res,
1da177e4 4756 };
d3129ef6 4757 unsigned long timestamp = jiffies;
778d2817 4758 int status;
1da177e4 4759
7c513058 4760 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
3c591175
TM		 4761 if (status == 0) {
4762 spin_lock(&dir->i_lock);
3c591175
TM		 4763 /* Removing a directory decrements nlink in the parent */
4764 if (ftype == NF4DIR && dir->i_nlink > 2)
4765 nfs4_dec_nlink_locked(dir);
82eae5a4
TM		 4766 nfs4_update_changeattr_locked(dir, &res.cinfo, timestamp,
4767 NFS_INO_INVALID_DATA);
3c591175
TM		 4768 spin_unlock(&dir->i_lock);
4769 }
1da177e4
LT		 4770 return status;
4771}
4772
912678db 4773static int nfs4_proc_remove(struct inode *dir, struct dentry *dentry)
1da177e4 4774{
0688e64b
TM		 4775 struct nfs4_exception exception = {
4776 .interruptible = true,
4777 };
912678db 4778 struct inode *inode = d_inode(dentry);
1da177e4 4779 int err;
912678db 4780
c01d3645
TM		 4781 if (inode) {
4782 if (inode->i_nlink == 1)
4783 nfs4_inode_return_delegation(inode);
4784 else
4785 nfs4_inode_make_writeable(inode);
4786 }
912678db 4787 do {
3c591175 4788 err = _nfs4_proc_remove(dir, &dentry->d_name, NF4REG);
912678db
TM		 4789 trace_nfs4_remove(dir, &dentry->d_name, err);
4790 err = nfs4_handle_exception(NFS_SERVER(dir), err,
4791 &exception);
4792 } while (exception.retry);
4793 return err;
4794}
4795
4796static int nfs4_proc_rmdir(struct inode *dir, const struct qstr *name)
4797{
0688e64b
TM		 4798 struct nfs4_exception exception = {
4799 .interruptible = true,
4800 };
912678db
TM		 4801 int err;
4802
1da177e4 4803 do {
3c591175 4804 err = _nfs4_proc_remove(dir, name, NF4DIR);
078ea3df
TM		 4805 trace_nfs4_remove(dir, name, err);
4806 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4807 &exception);
4808 } while (exception.retry);
4809 return err;
4810}
4811
ed7e9ad0
TM		 4812static void nfs4_proc_unlink_setup(struct rpc_message *msg,
4813 struct dentry *dentry,
4814 struct inode *inode)
1da177e4 4815{
e4eff1a6
TM		 4816 struct nfs_removeargs *args = msg->rpc_argp;
4817 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 4818
977fcc2b 4819 res->server = NFS_SB(dentry->d_sb);
1da177e4 4820 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
fba83f34 4821 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1, 0);
aa9c2669
DQ		 4822
4823 nfs_fattr_init(res->dir_attr);
977fcc2b 4824
00bdadc7 4825 if (inode) {
977fcc2b 4826 nfs4_inode_return_delegation(inode);
00bdadc7
TM		 4827 nfs_d_prune_case_insensitive_aliases(inode);
4828 }
1da177e4
LT		 4829}
4830
34e137cc
BS		 4831static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
4832{
42e1cca7 4833 nfs4_setup_sequence(NFS_SB(data->dentry->d_sb)->nfs_client,
d9afbd1b
TM		 4834 &data->args.seq_args,
4835 &data->res.seq_res,
4836 task);
1da177e4
LT		 4837}
4838
e4eff1a6 4839static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 4840{
078ea3df
TM		 4841 struct nfs_unlinkdata *data = task->tk_calldata;
4842 struct nfs_removeres *res = &data->res;
e4eff1a6 4843
14516c3a
TM		 4844 if (!nfs4_sequence_done(task, &res->seq_res))
4845 return 0;
8478eaa1
N		 4846 if (nfs4_async_handle_error(task, res->server, NULL,
4847 &data->timeout) == -EAGAIN)
e4eff1a6 4848 return 0;
c40d52fe 4849 if (task->tk_status == 0)
1b523ca9
FL		 4850 nfs4_update_changeattr(dir, &res->cinfo,
4851 res->dir_attr->time_start,
4852 NFS_INO_INVALID_DATA);
e4eff1a6 4853 return 1;
1da177e4
LT		 4854}
4855
f2c2c552
TM		 4856static void nfs4_proc_rename_setup(struct rpc_message *msg,
4857 struct dentry *old_dentry,
4858 struct dentry *new_dentry)
d3d4152a 4859{
d3d4152a
JL		 4860 struct nfs_renameargs *arg = msg->rpc_argp;
4861 struct nfs_renameres *res = msg->rpc_resp;
f2c2c552
TM		 4862 struct inode *old_inode = d_inode(old_dentry);
4863 struct inode *new_inode = d_inode(new_dentry);
d3d4152a 4864
f2c2c552 4865 if (old_inode)
c01d3645 4866 nfs4_inode_make_writeable(old_inode);
f2c2c552
TM		 4867 if (new_inode)
4868 nfs4_inode_return_delegation(new_inode);
d3d4152a 4869 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
f2c2c552 4870 res->server = NFS_SB(old_dentry->d_sb);
fba83f34 4871 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1, 0);
d3d4152a
JL		 4872}
4873
c6bfa1a1
BS		 4874static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
4875{
42e1cca7 4876 nfs4_setup_sequence(NFS_SERVER(data->old_dir)->nfs_client,
d9afbd1b
TM		 4877 &data->args.seq_args,
4878 &data->res.seq_res,
4879 task);
d3d4152a
JL		 4880}
4881
4882static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
4883 struct inode *new_dir)
4884{
fbc6f7c2
TM		 4885 struct nfs_renamedata *data = task->tk_calldata;
4886 struct nfs_renameres *res = &data->res;
d3d4152a
JL		 4887
4888 if (!nfs4_sequence_done(task, &res->seq_res))
4889 return 0;
8478eaa1 4890 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
d3d4152a
JL		 4891 return 0;
4892
c733c49c 4893 if (task->tk_status == 0) {
00bdadc7 4894 nfs_d_prune_case_insensitive_aliases(d_inode(data->old_dentry));
5636ec4e
TM		 4895 if (new_dir != old_dir) {
4896 /* Note: If we moved a directory, nlink will change */
1b523ca9 4897 nfs4_update_changeattr(old_dir, &res->old_cinfo,
5636ec4e 4898 res->old_fattr->time_start,
fabf2b34 4899 NFS_INO_INVALID_NLINK |
1b523ca9
FL		 4900 NFS_INO_INVALID_DATA);
4901 nfs4_update_changeattr(new_dir, &res->new_cinfo,
5636ec4e 4902 res->new_fattr->time_start,
fabf2b34 4903 NFS_INO_INVALID_NLINK |
1b523ca9 4904 NFS_INO_INVALID_DATA);
5636ec4e 4905 } else
1b523ca9 4906 nfs4_update_changeattr(old_dir, &res->old_cinfo,
5636ec4e 4907 res->old_fattr->time_start,
1b523ca9 4908 NFS_INO_INVALID_DATA);
c733c49c 4909 }
d3d4152a
JL		 4910 return 1;
4911}
4912
beffb8fe 4913static int _nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name)
1da177e4 4914{
91ba2eee 4915 struct nfs_server *server = NFS_SERVER(inode);
2f28dc38 4916 __u32 bitmask[NFS4_BITMASK_SZ];
1da177e4
LT		 4917 struct nfs4_link_arg arg = {
4918 .fh = NFS_FH(inode),
4919 .dir_fh = NFS_FH(dir),
4920 .name = name,
2f28dc38 4921 .bitmask = bitmask,
91ba2eee 4922 };
91ba2eee
TM		 4923 struct nfs4_link_res res = {
4924 .server = server,
1da177e4 4925 };
1da177e4
LT		 4926 struct rpc_message msg = {
4927 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
4928 .rpc_argp = &arg,
91ba2eee 4929 .rpc_resp = &res,
1da177e4 4930 };
136f2627
TM		 4931 int status = -ENOMEM;
4932
aa7ca3b2 4933 res.fattr = nfs_alloc_fattr_with_label(server);
778d2817 4934 if (res.fattr == NULL)
136f2627 4935 goto out;
1da177e4 4936
c01d3645 4937 nfs4_inode_make_writeable(inode);
aa7ca3b2 4938 nfs4_bitmap_copy_adjust(bitmask, nfs4_bitmask(server, res.fattr->label), inode,
a71029b8 4939 NFS_INO_INVALID_CHANGE);
7c513058 4940 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee 4941 if (!status) {
1b523ca9
FL		 4942 nfs4_update_changeattr(dir, &res.cinfo, res.fattr->time_start,
4943 NFS_INO_INVALID_DATA);
1301e421 4944 nfs4_inc_nlink(inode);
aa9c2669
DQ		 4945 status = nfs_post_op_update_inode(inode, res.fattr);
4946 if (!status)
dd225cb3 4947 nfs_setsecurity(inode, res.fattr);
91ba2eee 4948 }
14c43f76 4949
136f2627 4950out:
136f2627 4951 nfs_free_fattr(res.fattr);
1da177e4
LT		 4952 return status;
4953}
4954
beffb8fe 4955static int nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name)
1da177e4 4956{
0688e64b
TM		 4957 struct nfs4_exception exception = {
4958 .interruptible = true,
4959 };
1da177e4
LT		 4960 int err;
4961 do {
4962 err = nfs4_handle_exception(NFS_SERVER(inode),
4963 _nfs4_proc_link(inode, dir, name),
4964 &exception);
4965 } while (exception.retry);
4966 return err;
4967}
4968
57dc9a57
TM		 4969struct nfs4_createdata {
4970 struct rpc_message msg;
4971 struct nfs4_create_arg arg;
4972 struct nfs4_create_res res;
4973 struct nfs_fh fh;
4974 struct nfs_fattr fattr;
57dc9a57
TM		 4975};
4976
4977static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
beffb8fe 4978 const struct qstr *name, struct iattr *sattr, u32 ftype)
57dc9a57
TM		 4979{
4980 struct nfs4_createdata *data;
4981
4982 data = kzalloc(sizeof(*data), GFP_KERNEL);
4983 if (data != NULL) {
4984 struct nfs_server *server = NFS_SERVER(dir);
4985
68be1742
AS		 4986 data->fattr.label = nfs4_label_alloc(server, GFP_KERNEL);
4987 if (IS_ERR(data->fattr.label))
14c43f76
DQ		 4988 goto out_free;
4989
57dc9a57
TM		 4990 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
4991 data->msg.rpc_argp = &data->arg;
4992 data->msg.rpc_resp = &data->res;
4993 data->arg.dir_fh = NFS_FH(dir);
4994 data->arg.server = server;
4995 data->arg.name = name;
4996 data->arg.attrs = sattr;
4997 data->arg.ftype = ftype;
68be1742 4998 data->arg.bitmask = nfs4_bitmask(server, data->fattr.label);
dff25ddb 4999 data->arg.umask = current_umask();
57dc9a57
TM		 5000 data->res.server = server;
5001 data->res.fh = &data->fh;
5002 data->res.fattr = &data->fattr;
57dc9a57 5003 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 5004 }
5005 return data;
14c43f76
DQ		 5006out_free:
5007 kfree(data);
5008 return NULL;
57dc9a57
TM		 5009}
5010
5011static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
5012{
7c513058 5013 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 5014 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57 5015 if (status == 0) {
3c591175 5016 spin_lock(&dir->i_lock);
3c591175
TM		 5017 /* Creating a directory bumps nlink in the parent */
5018 if (data->arg.ftype == NF4DIR)
5019 nfs4_inc_nlink_locked(dir);
82eae5a4
TM		 5020 nfs4_update_changeattr_locked(dir, &data->res.dir_cinfo,
5021 data->res.fattr->time_start,
5022 NFS_INO_INVALID_DATA);
3c591175 5023 spin_unlock(&dir->i_lock);
d91bfc46 5024 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
57dc9a57
TM		 5025 }
5026 return status;
5027}
5028
5029static void nfs4_free_createdata(struct nfs4_createdata *data)
5030{
68be1742 5031 nfs4_label_free(data->fattr.label);
57dc9a57
TM		 5032 kfree(data);
5033}
5034
4f390c15 5035static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
f003a717 5036 struct folio *folio, unsigned int len, struct iattr *sattr,
1775fd3e 5037 struct nfs4_label *label)
1da177e4 5038{
f003a717 5039 struct page *page = &folio->page;
57dc9a57
TM		 5040 struct nfs4_createdata *data;
5041 int status = -ENAMETOOLONG;
1da177e4 5042
94a6d753 5043 if (len > NFS4_MAXPATHLEN)
57dc9a57 5044 goto out;
4f390c15 5045
57dc9a57
TM		 5046 status = -ENOMEM;
5047 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
5048 if (data == NULL)
5049 goto out;
5050
5051 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
5052 data->arg.u.symlink.pages = &page;
5053 data->arg.u.symlink.len = len;
1775fd3e 5054 data->arg.label = label;
1da177e4 5055
57dc9a57
TM		 5056 status = nfs4_do_create(dir, dentry, data);
5057
5058 nfs4_free_createdata(data);
5059out:
1da177e4
LT		 5060 return status;
5061}
5062
4f390c15 5063static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
f003a717 5064 struct folio *folio, unsigned int len, struct iattr *sattr)
1da177e4 5065{
0688e64b
TM		 5066 struct nfs4_exception exception = {
5067 .interruptible = true,
5068 };
c528f70f 5069 struct nfs4_label l, *label;
1da177e4 5070 int err;
aa9c2669
DQ		 5071
5072 label = nfs4_label_init_security(dir, dentry, sattr, &l);
5073
1da177e4 5074 do {
f003a717 5075 err = _nfs4_proc_symlink(dir, dentry, folio, len, sattr, label);
078ea3df
TM		 5076 trace_nfs4_symlink(dir, &dentry->d_name, err);
5077 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 5078 &exception);
5079 } while (exception.retry);
aa9c2669
DQ		 5080
5081 nfs4_label_release_security(label);
1da177e4
LT		 5082 return err;
5083}
5084
5085static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 5086 struct iattr *sattr, struct nfs4_label *label)
1da177e4 5087{
57dc9a57
TM		 5088 struct nfs4_createdata *data;
5089 int status = -ENOMEM;
1da177e4 5090
57dc9a57
TM		 5091 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
5092 if (data == NULL)
5093 goto out;
5094
1775fd3e 5095 data->arg.label = label;
57dc9a57
TM		 5096 status = nfs4_do_create(dir, dentry, data);
5097
5098 nfs4_free_createdata(data);
5099out:
1da177e4
LT		 5100 return status;
5101}
5102
5103static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
5104 struct iattr *sattr)
5105{
dff25ddb 5106 struct nfs_server *server = NFS_SERVER(dir);
0688e64b
TM		 5107 struct nfs4_exception exception = {
5108 .interruptible = true,
5109 };
c528f70f 5110 struct nfs4_label l, *label;
1da177e4 5111 int err;
a8a5da99 5112
aa9c2669
DQ		 5113 label = nfs4_label_init_security(dir, dentry, sattr, &l);
5114
dff25ddb
AG		 5115 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
5116 sattr->ia_mode &= ~current_umask();
1da177e4 5117 do {
078ea3df
TM		 5118 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
5119 trace_nfs4_mkdir(dir, &dentry->d_name, err);
5120 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 5121 &exception);
5122 } while (exception.retry);
aa9c2669
DQ		 5123 nfs4_label_release_security(label);
5124
1da177e4
LT		 5125 return err;
5126}
5127
82e22a5e
TM		 5128static int _nfs4_proc_readdir(struct nfs_readdir_arg *nr_arg,
5129 struct nfs_readdir_res *nr_res)
1da177e4 5130{
82e22a5e 5131 struct inode *dir = d_inode(nr_arg->dentry);
05ad9175 5132 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 5133 struct nfs4_readdir_arg args = {
5134 .fh = NFS_FH(dir),
82e22a5e 5135 .pages = nr_arg->pages,
1da177e4 5136 .pgbase = 0,
82e22a5e
TM		 5137 .count = nr_arg->page_len,
5138 .plus = nr_arg->plus,
1da177e4
LT		 5139 };
5140 struct nfs4_readdir_res res;
5141 struct rpc_message msg = {
5142 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
5143 .rpc_argp = &args,
5144 .rpc_resp = &res,
82e22a5e 5145 .rpc_cred = nr_arg->cred,
1da177e4
LT		 5146 };
5147 int status;
5148
82e22a5e
TM		 5149 dprintk("%s: dentry = %pd2, cookie = %llu\n", __func__,
5150 nr_arg->dentry, (unsigned long long)nr_arg->cookie);
05ad9175
OK		 5151 if (!(server->caps & NFS_CAP_SECURITY_LABEL))
5152 args.bitmask = server->attr_bitmask_nl;
5153 else
5154 args.bitmask = server->attr_bitmask;
5155
82e22a5e 5156 nfs4_setup_readdir(nr_arg->cookie, nr_arg->verf, nr_arg->dentry, &args);
1da177e4 5157 res.pgbase = args.pgbase;
05ad9175
OK		 5158 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
5159 &res.seq_res, 0);
ac396128 5160 if (status >= 0) {
82e22a5e 5161 memcpy(nr_res->verf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 5162 status += args.pgbase;
5163 }
c4812998
TM		 5164
5165 nfs_invalidate_atime(dir);
5166
3110ff80 5167 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 5168 return status;
5169}
5170
82e22a5e
TM		 5171static int nfs4_proc_readdir(struct nfs_readdir_arg *arg,
5172 struct nfs_readdir_res *res)
1da177e4 5173{
0688e64b
TM		 5174 struct nfs4_exception exception = {
5175 .interruptible = true,
5176 };
1da177e4
LT		 5177 int err;
5178 do {
82e22a5e
TM		 5179 err = _nfs4_proc_readdir(arg, res);
5180 trace_nfs4_readdir(d_inode(arg->dentry), err);
5181 err = nfs4_handle_exception(NFS_SERVER(d_inode(arg->dentry)),
5182 err, &exception);
1da177e4
LT		 5183 } while (exception.retry);
5184 return err;
5185}
5186
5187static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 5188 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 5189{
57dc9a57
TM		 5190 struct nfs4_createdata *data;
5191 int mode = sattr->ia_mode;
5192 int status = -ENOMEM;
1da177e4 5193
57dc9a57
TM		 5194 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
5195 if (data == NULL)
5196 goto out;
5197
1da177e4 5198 if (S_ISFIFO(mode))
57dc9a57 5199 data->arg.ftype = NF4FIFO;
1da177e4 5200 else if (S_ISBLK(mode)) {
57dc9a57
TM		 5201 data->arg.ftype = NF4BLK;
5202 data->arg.u.device.specdata1 = MAJOR(rdev);
5203 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 5204 }
5205 else if (S_ISCHR(mode)) {
57dc9a57
TM		 5206 data->arg.ftype = NF4CHR;
5207 data->arg.u.device.specdata1 = MAJOR(rdev);
5208 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 5209 } else if (!S_ISSOCK(mode)) {
5210 status = -EINVAL;
5211 goto out_free;
1da177e4 5212 }
1775fd3e 5213
aa9c2669 5214 data->arg.label = label;
57dc9a57 5215 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 5216out_free:
57dc9a57
TM		 5217 nfs4_free_createdata(data);
5218out:
1da177e4
LT		 5219 return status;
5220}
5221
5222static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
5223 struct iattr *sattr, dev_t rdev)
5224{
dff25ddb 5225 struct nfs_server *server = NFS_SERVER(dir);
0688e64b
TM		 5226 struct nfs4_exception exception = {
5227 .interruptible = true,
5228 };
c528f70f 5229 struct nfs4_label l, *label;
1da177e4 5230 int err;
a8a5da99 5231
aa9c2669
DQ		 5232 label = nfs4_label_init_security(dir, dentry, sattr, &l);
5233
dff25ddb
AG		 5234 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
5235 sattr->ia_mode &= ~current_umask();
1da177e4 5236 do {
078ea3df
TM		 5237 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
5238 trace_nfs4_mknod(dir, &dentry->d_name, err);
5239 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 5240 &exception);
5241 } while (exception.retry);
aa9c2669
DQ		 5242
5243 nfs4_label_release_security(label);
5244
1da177e4
LT		 5245 return err;
5246}
5247
5248static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
5249 struct nfs_fsstat *fsstat)
5250{
5251 struct nfs4_statfs_arg args = {
5252 .fh = fhandle,
5253 .bitmask = server->attr_bitmask,
5254 };
24ad148a
BH		 5255 struct nfs4_statfs_res res = {
5256 .fsstat = fsstat,
5257 };
1da177e4
LT		 5258 struct rpc_message msg = {
5259 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
5260 .rpc_argp = &args,
24ad148a 5261 .rpc_resp = &res,
1da177e4
LT		 5262 };
5263
0e574af1 5264 nfs_fattr_init(fsstat->fattr);
7c513058 5265 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 5266}
5267
5268static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
5269{
0688e64b
TM		 5270 struct nfs4_exception exception = {
5271 .interruptible = true,
5272 };
1da177e4
LT		 5273 int err;
5274 do {
5275 err = nfs4_handle_exception(server,
5276 _nfs4_proc_statfs(server, fhandle, fsstat),
5277 &exception);
5278 } while (exception.retry);
5279 return err;
5280}
5281
5282static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
5283 struct nfs_fsinfo *fsinfo)
5284{
5285 struct nfs4_fsinfo_arg args = {
5286 .fh = fhandle,
5287 .bitmask = server->attr_bitmask,
5288 };
3dda5e43
BH		 5289 struct nfs4_fsinfo_res res = {
5290 .fsinfo = fsinfo,
5291 };
1da177e4
LT		 5292 struct rpc_message msg = {
5293 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
5294 .rpc_argp = &args,
3dda5e43 5295 .rpc_resp = &res,
1da177e4
LT		 5296 };
5297
7c513058 5298 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 5299}
5300
5301static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
5302{
0688e64b
TM		 5303 struct nfs4_exception exception = {
5304 .interruptible = true,
5305 };
1da177e4
LT		 5306 int err;
5307
5308 do {
83ca7f5a 5309 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
b5f875a9 5310 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
83ca7f5a 5311 if (err == 0) {
7dc2993a 5312 nfs4_set_lease_period(server->nfs_client, fsinfo->lease_time * HZ);
83ca7f5a
CL		 5313 break;
5314 }
5315 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 5316 } while (exception.retry);
5317 return err;
5318}
5319
5320static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
5321{
e38eb650
BS		 5322 int error;
5323
0e574af1 5324 nfs_fattr_init(fsinfo->fattr);
e38eb650 5325 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 5326 if (error == 0) {
5327 /* block layout checks this! */
5328 server->pnfs_blksize = fsinfo->blksize;
ca440c38 5329 set_pnfs_layoutdriver(server, fhandle, fsinfo);
dc182549 5330 }
e38eb650
BS		 5331
5332 return error;
1da177e4
LT		 5333}
5334
5335static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
5336 struct nfs_pathconf *pathconf)
5337{
5338 struct nfs4_pathconf_arg args = {
5339 .fh = fhandle,
5340 .bitmask = server->attr_bitmask,
5341 };
d45b2989
BH		 5342 struct nfs4_pathconf_res res = {
5343 .pathconf = pathconf,
5344 };
1da177e4
LT		 5345 struct rpc_message msg = {
5346 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
5347 .rpc_argp = &args,
d45b2989 5348 .rpc_resp = &res,
1da177e4
LT		 5349 };
5350
5351 /* None of the pathconf attributes are mandatory to implement */
5352 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
5353 memset(pathconf, 0, sizeof(*pathconf));
5354 return 0;
5355 }
5356
0e574af1 5357 nfs_fattr_init(pathconf->fattr);
7c513058 5358 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 5359}
5360
5361static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
5362 struct nfs_pathconf *pathconf)
5363{
0688e64b
TM		 5364 struct nfs4_exception exception = {
5365 .interruptible = true,
5366 };
1da177e4
LT		 5367 int err;
5368
5369 do {
5370 err = nfs4_handle_exception(server,
5371 _nfs4_proc_pathconf(server, fhandle, pathconf),
5372 &exception);
5373 } while (exception.retry);
5374 return err;
5375}
5376
5521abfd 5377int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 5378 const struct nfs_open_context *ctx,
5379 const struct nfs_lock_context *l_ctx,
5380 fmode_t fmode)
5381{
17393475 5382 return nfs4_select_rw_stateid(ctx->state, fmode, l_ctx, stateid, NULL);
9b206149
TM		 5383}
5384EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
5385
5521abfd
TM		 5386static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
5387 const struct nfs_open_context *ctx,
5388 const struct nfs_lock_context *l_ctx,
5389 fmode_t fmode)
5390{
d49dd117 5391 nfs4_stateid _current_stateid;
5521abfd 5392
e1253be0 5393 /* If the current stateid represents a lost lock, then exit */
d49dd117 5394 if (nfs4_set_rw_stateid(&_current_stateid, ctx, l_ctx, fmode) == -EIO)
e1253be0 5395 return true;
d49dd117 5396 return nfs4_stateid_match(stateid, &_current_stateid);
5521abfd
TM		 5397}
5398
5399static bool nfs4_error_stateid_expired(int err)
5400{
5401 switch (err) {
5402 case -NFS4ERR_DELEG_REVOKED:
5403 case -NFS4ERR_ADMIN_REVOKED:
5404 case -NFS4ERR_BAD_STATEID:
5405 case -NFS4ERR_STALE_STATEID:
5406 case -NFS4ERR_OLD_STATEID:
5407 case -NFS4ERR_OPENMODE:
5408 case -NFS4ERR_EXPIRED:
5409 return true;
5410 }
5411 return false;
5412}
5413
d45f60c6 5414static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
1da177e4 5415{
d45f60c6 5416 struct nfs_server *server = NFS_SERVER(hdr->inode);
1da177e4 5417
d45f60c6 5418 trace_nfs4_read(hdr, task->tk_status);
9c27869d
TM		 5419 if (task->tk_status < 0) {
5420 struct nfs4_exception exception = {
5421 .inode = hdr->inode,
5422 .state = hdr->args.context->state,
5423 .stateid = &hdr->args.stateid,
5424 };
5425 task->tk_status = nfs4_async_handle_exception(task,
5426 server, task->tk_status, &exception);
5427 if (exception.retry) {
5428 rpc_restart_call_prepare(task);
5429 return -EAGAIN;
5430 }
1da177e4 5431 }
8850df99 5432
1da177e4 5433 if (task->tk_status > 0)
d45f60c6 5434 renew_lease(server, hdr->timestamp);
ec06c096 5435 return 0;
1da177e4
LT		 5436}
5437
5521abfd 5438static bool nfs4_read_stateid_changed(struct rpc_task *task,
3c6b899c 5439 struct nfs_pgio_args *args)
5521abfd
TM		 5440{
5441
5442 if (!nfs4_error_stateid_expired(task->tk_status) ||
5443 nfs4_stateid_is_current(&args->stateid,
5444 args->context,
5445 args->lock_context,
5446 FMODE_READ))
5447 return false;
5448 rpc_restart_call_prepare(task);
5449 return true;
5450}
5451
c5675526
AS		 5452static bool nfs4_read_plus_not_supported(struct rpc_task *task,
5453 struct nfs_pgio_header *hdr)
cbdabc7f 5454{
c5675526
AS		 5455 struct nfs_server *server = NFS_SERVER(hdr->inode);
5456 struct rpc_message *msg = &task->tk_msg;
cbdabc7f 5457
c5675526 5458 if (msg->rpc_proc == &nfs4_procedures[NFSPROC4_CLNT_READ_PLUS] &&
f06d1b10 5459 task->tk_status == -ENOTSUPP) {
c5675526
AS		 5460 server->caps &= ~NFS_CAP_READ_PLUS;
5461 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
5462 rpc_restart_call_prepare(task);
5463 return true;
5464 }
5465 return false;
5466}
5467
43439d85
AS		 5468static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
5469{
d45f60c6 5470 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
cbdabc7f 5471 return -EAGAIN;
d45f60c6 5472 if (nfs4_read_stateid_changed(task, &hdr->args))
5521abfd 5473 return -EAGAIN;
c5675526
AS		 5474 if (nfs4_read_plus_not_supported(task, hdr))
5475 return -EAGAIN;
bfc505de
TM		 5476 if (task->tk_status > 0)
5477 nfs_invalidate_atime(hdr->inode);
d45f60c6
WAA		 5478 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
5479 nfs4_read_done_cb(task, hdr);
cbdabc7f
AA		 5480}
5481
21e31401 5482#if defined CONFIG_NFS_V4_2 && defined CONFIG_NFS_V4_2_READ_PLUS
fbd2a05f 5483static bool nfs42_read_plus_support(struct nfs_pgio_header *hdr,
5c3485bb 5484 struct rpc_message *msg)
c5675526 5485{
5c3485bb 5486 /* Note: We don't use READ_PLUS with pNFS yet */
fbd2a05f 5487 if (nfs_server_capable(hdr->inode, NFS_CAP_READ_PLUS) && !hdr->ds_clp) {
c5675526 5488 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ_PLUS];
303a7805 5489 return nfs_read_alloc_scratch(hdr, READ_PLUS_SCRATCH_SIZE);
fbd2a05f
AS		 5490 }
5491 return false;
c5675526
AS		 5492}
5493#else
fbd2a05f 5494static bool nfs42_read_plus_support(struct nfs_pgio_header *hdr,
5c3485bb 5495 struct rpc_message *msg)
c5675526 5496{
fbd2a05f 5497 return false;
c5675526
AS		 5498}
5499#endif /* CONFIG_NFS_V4_2 */
5500
d45f60c6
WAA		 5501static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
5502 struct rpc_message *msg)
1da177e4 5503{
d45f60c6 5504 hdr->timestamp = jiffies;
ca857cc1
TM		 5505 if (!hdr->pgio_done_cb)
5506 hdr->pgio_done_cb = nfs4_read_done_cb;
fbd2a05f
AS		 5507 if (!nfs42_read_plus_support(hdr, msg))
5508 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
fba83f34 5509 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0, 0);
1da177e4
LT		 5510}
5511
d45f60c6
WAA		 5512static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
5513 struct nfs_pgio_header *hdr)
ea7c3303 5514{
42e1cca7 5515 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode)->nfs_client,
d45f60c6
WAA		 5516 &hdr->args.seq_args,
5517 &hdr->res.seq_res,
9b206149 5518 task))
ef1820f9 5519 return 0;
d45f60c6
WAA		 5520 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
5521 hdr->args.lock_context,
fbe77c30 5522 hdr->rw_mode) == -EIO)
ef1820f9 5523 return -EIO;
d45f60c6 5524 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
ef1820f9
N		 5525 return -EIO;
5526 return 0;
1da177e4
LT		 5527}
5528
d45f60c6
WAA		 5529static int nfs4_write_done_cb(struct rpc_task *task,
5530 struct nfs_pgio_header *hdr)
1da177e4 5531{
d45f60c6 5532 struct inode *inode = hdr->inode;
8478eaa1 5533
d45f60c6 5534 trace_nfs4_write(hdr, task->tk_status);
9c27869d
TM		 5535 if (task->tk_status < 0) {
5536 struct nfs4_exception exception = {
5537 .inode = hdr->inode,
5538 .state = hdr->args.context->state,
5539 .stateid = &hdr->args.stateid,
5540 };
5541 task->tk_status = nfs4_async_handle_exception(task,
5542 NFS_SERVER(inode), task->tk_status,
5543 &exception);
5544 if (exception.retry) {
5545 rpc_restart_call_prepare(task);
5546 return -EAGAIN;
5547 }
1da177e4 5548 }
4f9838c7 5549 if (task->tk_status >= 0) {
d45f60c6 5550 renew_lease(NFS_SERVER(inode), hdr->timestamp);
a08a8cd3 5551 nfs_writeback_update_inode(hdr);
4f9838c7 5552 }
788e7a89 5553 return 0;
1da177e4
LT		 5554}
5555
5521abfd 5556static bool nfs4_write_stateid_changed(struct rpc_task *task,
3c6b899c 5557 struct nfs_pgio_args *args)
5521abfd
TM		 5558{
5559
5560 if (!nfs4_error_stateid_expired(task->tk_status) ||
5561 nfs4_stateid_is_current(&args->stateid,
5562 args->context,
5563 args->lock_context,
5564 FMODE_WRITE))
5565 return false;
5566 rpc_restart_call_prepare(task);
5567 return true;
5568}
5569
d45f60c6 5570static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
b029bc9b 5571{
d45f60c6 5572 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
b029bc9b 5573 return -EAGAIN;
d45f60c6 5574 if (nfs4_write_stateid_changed(task, &hdr->args))
5521abfd 5575 return -EAGAIN;
d45f60c6
WAA		 5576 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
5577 nfs4_write_done_cb(task, hdr);
b029bc9b
FI		 5578}
5579
5a37f851 5580static
d45f60c6 5581bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
a69aef14 5582{
5a37f851 5583 /* Don't request attributes for pNFS or O_DIRECT writes */
d45f60c6 5584 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
5a37f851
TM		 5585 return false;
5586 /* Otherwise, request attributes if and only if we don't hold
5587 * a delegation
5588 */
011e2a7f 5589 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 5590}
a69aef14 5591
85847280
TM		 5592void nfs4_bitmask_set(__u32 bitmask[], const __u32 src[],
5593 struct inode *inode, unsigned long cache_validity)
76bd5c01 5594{
85847280 5595 struct nfs_server *server = NFS_SERVER(inode);
332d1a03 5596 unsigned int i;
76bd5c01 5597
332d1a03 5598 memcpy(bitmask, src, sizeof(*bitmask) * NFS4_BITMASK_SZ);
85847280 5599 cache_validity |= READ_ONCE(NFS_I(inode)->cache_validity);
76bd5c01 5600
13c0b082 5601 if (cache_validity & NFS_INO_INVALID_CHANGE)
332d1a03 5602 bitmask[0] |= FATTR4_WORD0_CHANGE;
76bd5c01
OK		 5603 if (cache_validity & NFS_INO_INVALID_ATIME)
5604 bitmask[1] |= FATTR4_WORD1_TIME_ACCESS;
720869eb
TM		 5605 if (cache_validity & NFS_INO_INVALID_MODE)
5606 bitmask[1] |= FATTR4_WORD1_MODE;
45901a23 5607 if (cache_validity & NFS_INO_INVALID_OTHER)
720869eb 5608 bitmask[1] |= FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP;
fabf2b34
TM		 5609 if (cache_validity & NFS_INO_INVALID_NLINK)
5610 bitmask[1] |= FATTR4_WORD1_NUMLINKS;
45901a23
TM		 5611 if (cache_validity & NFS_INO_INVALID_CTIME)
5612 bitmask[1] |= FATTR4_WORD1_TIME_METADATA;
76bd5c01
OK		 5613 if (cache_validity & NFS_INO_INVALID_MTIME)
5614 bitmask[1] |= FATTR4_WORD1_TIME_MODIFY;
76bd5c01
OK		 5615 if (cache_validity & NFS_INO_INVALID_BLOCKS)
5616 bitmask[1] |= FATTR4_WORD1_SPACE_USED;
332d1a03 5617
cc7f2dae 5618 if (cache_validity & NFS_INO_INVALID_SIZE)
332d1a03
TM		 5619 bitmask[0] |= FATTR4_WORD0_SIZE;
5620
5621 for (i = 0; i < NFS4_BITMASK_SZ; i++)
5622 bitmask[i] &= server->attr_bitmask[i];
76bd5c01
OK		 5623}
5624
d45f60c6 5625static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
fb91fb0e
AS		 5626 struct rpc_message *msg,
5627 struct rpc_clnt **clnt)
1da177e4 5628{
d45f60c6 5629 struct nfs_server *server = NFS_SERVER(hdr->inode);
bdc7f021 5630
d45f60c6
WAA		 5631 if (!nfs4_write_need_cache_consistency_data(hdr)) {
5632 hdr->args.bitmask = NULL;
5633 hdr->res.fattr = NULL;
76bd5c01 5634 } else {
332d1a03
TM		 5635 nfs4_bitmask_set(hdr->args.bitmask_store,
5636 server->cache_consistency_bitmask,
85847280 5637 hdr->inode, NFS_INO_INVALID_BLOCKS);
332d1a03 5638 hdr->args.bitmask = hdr->args.bitmask_store;
76bd5c01 5639 }
5a37f851 5640
d45f60c6
WAA		 5641 if (!hdr->pgio_done_cb)
5642 hdr->pgio_done_cb = nfs4_write_done_cb;
5643 hdr->res.server = server;
5644 hdr->timestamp = jiffies;
1da177e4 5645
bdc7f021 5646 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
cd1b659d 5647 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0, 0);
5cc7688b 5648 nfs4_state_protect_write(hdr->ds_clp ? hdr->ds_clp : server->nfs_client, clnt, msg, hdr);
1da177e4
LT		 5649}
5650
0b7c0153 5651static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 5652{
42e1cca7 5653 nfs4_setup_sequence(NFS_SERVER(data->inode)->nfs_client,
d9afbd1b
TM		 5654 &data->args.seq_args,
5655 &data->res.seq_res,
5656 task);
1da177e4
LT		 5657}
5658
0b7c0153 5659static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 5660{
1da177e4 5661 struct inode *inode = data->inode;
14516c3a 5662
cc668ab3 5663 trace_nfs4_commit(data, task->tk_status);
8478eaa1
N		 5664 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
5665 NULL, NULL) == -EAGAIN) {
d00c5d43 5666 rpc_restart_call_prepare(task);
788e7a89 5667 return -EAGAIN;
1da177e4 5668 }
788e7a89 5669 return 0;
1da177e4
LT		 5670}
5671
0b7c0153 5672static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 5673{
5674 if (!nfs4_sequence_done(task, &data->res.seq_res))
5675 return -EAGAIN;
0b7c0153 5676 return data->commit_done_cb(task, data);
5f452431
FI		 5677}
5678
e9ae1ee2
AS		 5679static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg,
5680 struct rpc_clnt **clnt)
1da177e4 5681{
788e7a89 5682 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 5683
0b7c0153
FI		 5684 if (data->commit_done_cb == NULL)
5685 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 5686 data->res.server = server;
bdc7f021 5687 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
fba83f34 5688 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 0);
5cc7688b
OK		 5689 nfs4_state_protect(data->ds_clp ? data->ds_clp : server->nfs_client,
5690 NFS_SP4_MACH_CRED_COMMIT, clnt, msg);
1da177e4
LT		 5691}
5692
6b8d84e2
OK		 5693static int _nfs4_proc_commit(struct file *dst, struct nfs_commitargs *args,
5694 struct nfs_commitres *res)
5695{
5696 struct inode *dst_inode = file_inode(dst);
5697 struct nfs_server *server = NFS_SERVER(dst_inode);
5698 struct rpc_message msg = {
5699 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT],
5700 .rpc_argp = args,
5701 .rpc_resp = res,
5702 };
5703
5704 args->fh = NFS_FH(dst_inode);
5705 return nfs4_call_sync(server->client, server, &msg,
5706 &args->seq_args, &res->seq_res, 1);
5707}
5708
5709int nfs4_proc_commit(struct file *dst, __u64 offset, __u32 count, struct nfs_commitres *res)
5710{
5711 struct nfs_commitargs args = {
5712 .offset = offset,
5713 .count = count,
5714 };
5715 struct nfs_server *dst_server = NFS_SERVER(file_inode(dst));
5716 struct nfs4_exception exception = { };
5717 int status;
5718
5719 do {
5720 status = _nfs4_proc_commit(dst, &args, res);
5721 status = nfs4_handle_exception(dst_server, status, &exception);
5722 } while (exception.retry);
5723
5724 return status;
5725}
5726
9bc4e3ca
CL		 5727struct nfs4_renewdata {
5728 struct nfs_client *client;
5729 unsigned long timestamp;
5730};
5731
1da177e4
LT		 5732/*
5733 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
5734 * standalone procedure for queueing an asynchronous RENEW.
5735 */
9bc4e3ca 5736static void nfs4_renew_release(void *calldata)
dc96aef9 5737{
9bc4e3ca
CL		 5738 struct nfs4_renewdata *data = calldata;
5739 struct nfs_client *clp = data->client;
dc96aef9 5740
212bf41d 5741 if (refcount_read(&clp->cl_count) > 1)
0851de06
AB		 5742 nfs4_schedule_state_renewal(clp);
5743 nfs_put_client(clp);
9bc4e3ca 5744 kfree(data);
dc96aef9
AB		 5745}
5746
9bc4e3ca 5747static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 5748{
9bc4e3ca
CL		 5749 struct nfs4_renewdata *data = calldata;
5750 struct nfs_client *clp = data->client;
5751 unsigned long timestamp = data->timestamp;
1da177e4 5752
c6d01c6f 5753 trace_nfs4_renew_async(clp, task->tk_status);
f8aba1e8
CL		 5754 switch (task->tk_status) {
5755 case 0:
5756 break;
5757 case -NFS4ERR_LEASE_MOVED:
5758 nfs4_schedule_lease_moved_recovery(clp);
5759 break;
5760 default:
95baa25c 5761 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 5762 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
5763 return;
5764 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 5765 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 5766 return;
5767 }
5768 nfs4_schedule_path_down_recovery(clp);
1da177e4 5769 }
452e9352 5770 do_renew_lease(clp, timestamp);
1da177e4
LT		 5771}
5772
963d8fe5
TM		 5773static const struct rpc_call_ops nfs4_renew_ops = {
5774 .rpc_call_done = nfs4_renew_done,
dc96aef9 5775 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 5776};
5777
a52458b4 5778static int nfs4_proc_async_renew(struct nfs_client *clp, const struct cred *cred, unsigned renew_flags)
1da177e4
LT		 5779{
5780 struct rpc_message msg = {
5781 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
5782 .rpc_argp = clp,
b4454fe1 5783 .rpc_cred = cred,
1da177e4 5784 };
9bc4e3ca 5785 struct nfs4_renewdata *data;
1da177e4 5786
2f60ea6b
TM		 5787 if (renew_flags == 0)
5788 return 0;
212bf41d 5789 if (!refcount_inc_not_zero(&clp->cl_count))
0851de06 5790 return -EIO;
b569ad34 5791 data = kmalloc(sizeof(*data), GFP_NOFS);
5c737cb2
DW		 5792 if (data == NULL) {
5793 nfs_put_client(clp);
9bc4e3ca 5794 return -ENOMEM;
5c737cb2 5795 }
9bc4e3ca
CL		 5796 data->client = clp;
5797 data->timestamp = jiffies;
bc7a05ca 5798 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 5799 &nfs4_renew_ops, data);
1da177e4
LT		 5800}
5801
a52458b4 5802static int nfs4_proc_renew(struct nfs_client *clp, const struct cred *cred)
1da177e4
LT		 5803{
5804 struct rpc_message msg = {
5805 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
5806 .rpc_argp = clp,
b4454fe1 5807 .rpc_cred = cred,
1da177e4
LT		 5808 };
5809 unsigned long now = jiffies;
5810 int status;
5811
bc7a05ca 5812 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 5813 if (status < 0)
5814 return status;
452e9352 5815 do_renew_lease(clp, now);
1da177e4
LT		 5816 return 0;
5817}
5818
7b8b44eb
TM		 5819static bool nfs4_server_supports_acls(const struct nfs_server *server,
5820 enum nfs4_acl_type type)
aa1870af 5821{
7b8b44eb
TM		 5822 switch (type) {
5823 default:
5824 return server->attr_bitmask[0] & FATTR4_WORD0_ACL;
5825 case NFS4ACL_DACL:
5826 return server->attr_bitmask[1] & FATTR4_WORD1_DACL;
5827 case NFS4ACL_SACL:
5828 return server->attr_bitmask[1] & FATTR4_WORD1_SACL;
5829 }
aa1870af
BF		 5830}
5831
21f498c2
TM		 5832/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
5833 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 5834 * the stack.
5835 */
21f498c2 5836#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 5837
ccde1e9c 5838int nfs4_buf_to_pages_noslab(const void *buf, size_t buflen,
8fbcf237 5839 struct page **pages)
e9e3d724
NH		 5840{
5841 struct page *newpage, **spages;
5842 int rc = 0;
5843 size_t len;
5844 spages = pages;
5845
5846 do {
21f498c2 5847 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 5848 newpage = alloc_page(GFP_KERNEL);
5849
5850 if (newpage == NULL)
5851 goto unwind;
5852 memcpy(page_address(newpage), buf, len);
d9b67e1e
AS		 5853 buf += len;
5854 buflen -= len;
e9e3d724
NH		 5855 *pages++ = newpage;
5856 rc++;
5857 } while (buflen != 0);
5858
5859 return rc;
5860
5861unwind:
5862 for(; rc > 0; rc--)
5863 __free_page(spages[rc-1]);
5864 return -ENOMEM;
5865}
5866
e50a1c2e 5867struct nfs4_cached_acl {
7b8b44eb 5868 enum nfs4_acl_type type;
e50a1c2e
BF		 5869 int cached;
5870 size_t len;
5601cda8 5871 char data[];
e50a1c2e
BF		 5872};
5873
5874static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
5875{
5876 struct nfs_inode *nfsi = NFS_I(inode);
5877
5878 spin_lock(&inode->i_lock);
5879 kfree(nfsi->nfs4_acl);
5880 nfsi->nfs4_acl = acl;
5881 spin_unlock(&inode->i_lock);
5882}
5883
5884static void nfs4_zap_acl_attr(struct inode *inode)
5885{
5886 nfs4_set_cached_acl(inode, NULL);
5887}
5888
7b8b44eb
TM		 5889static ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf,
5890 size_t buflen, enum nfs4_acl_type type)
e50a1c2e
BF		 5891{
5892 struct nfs_inode *nfsi = NFS_I(inode);
5893 struct nfs4_cached_acl *acl;
5894 int ret = -ENOENT;
5895
5896 spin_lock(&inode->i_lock);
5897 acl = nfsi->nfs4_acl;
5898 if (acl == NULL)
5899 goto out;
7b8b44eb
TM		 5900 if (acl->type != type)
5901 goto out;
e50a1c2e
BF		 5902 if (buf == NULL) /* user is just asking for length */
5903 goto out_len;
5904 if (acl->cached == 0)
5905 goto out;
5906 ret = -ERANGE; /* see getxattr(2) man page */
5907 if (acl->len > buflen)
5908 goto out;
5909 memcpy(buf, acl->data, acl->len);
5910out_len:
5911 ret = acl->len;
5912out:
5913 spin_unlock(&inode->i_lock);
5914 return ret;
5915}
5916
7b8b44eb
TM		 5917static void nfs4_write_cached_acl(struct inode *inode, struct page **pages,
5918 size_t pgbase, size_t acl_len,
5919 enum nfs4_acl_type type)
e50a1c2e
BF		 5920{
5921 struct nfs4_cached_acl *acl;
b291f1b1 5922 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 5923
1f1ea6c2 5924 if (buflen <= PAGE_SIZE) {
b291f1b1 5925 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 5926 if (acl == NULL)
5927 goto out;
5928 acl->cached = 1;
5794d21e 5929 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 5930 } else {
5931 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
5932 if (acl == NULL)
5933 goto out;
5934 acl->cached = 0;
5935 }
7b8b44eb 5936 acl->type = type;
e50a1c2e
BF		 5937 acl->len = acl_len;
5938out:
5939 nfs4_set_cached_acl(inode, acl);
5940}
5941
bf118a34
AA		 5942/*
5943 * The getxattr API returns the required buffer length when called with a
5944 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
5945 * the required buf. On a NULL buf, we send a page of data to the server
5946 * guessing that the ACL request can be serviced by a page. If so, we cache
5947 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
5948 * the cache. If not so, we throw away the page, and cache the required
5949 * length. The next getxattr call will then produce another round trip to
5950 * the server, this time with the input buf of the required size.
5951 */
7b8b44eb
TM		 5952static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf,
5953 size_t buflen, enum nfs4_acl_type type)
aa1870af 5954{
62a1573f 5955 struct page **pages;
aa1870af
BF		 5956 struct nfs_getaclargs args = {
5957 .fh = NFS_FH(inode),
db145db0 5958 .acl_type = type,
aa1870af
BF		 5959 .acl_len = buflen,
5960 };
663c79b3 5961 struct nfs_getaclres res = {
db145db0 5962 .acl_type = type,
663c79b3
BH		 5963 .acl_len = buflen,
5964 };
aa1870af
BF		 5965 struct rpc_message msg = {
5966 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
5967 .rpc_argp = &args,
663c79b3 5968 .rpc_resp = &res,
aa1870af 5969 };
62a1573f 5970 unsigned int npages;
21f498c2 5971 int ret = -ENOMEM, i;
62a1573f
OK		 5972 struct nfs_server *server = NFS_SERVER(inode);
5973
5974 if (buflen == 0)
5975 buflen = server->rsize;
5976
5977 npages = DIV_ROUND_UP(buflen, PAGE_SIZE) + 1;
da48f267 5978 pages = kmalloc_array(npages, sizeof(struct page *), GFP_KERNEL);
62a1573f
OK		 5979 if (!pages)
5980 return -ENOMEM;
aa1870af 5981
62a1573f 5982 args.acl_pages = pages;
5a006899 5983
bf118a34
AA		 5984 for (i = 0; i < npages; i++) {
5985 pages[i] = alloc_page(GFP_KERNEL);
5986 if (!pages[i])
5987 goto out_free;
e50a1c2e 5988 }
5a006899
SP		 5989
5990 /* for decoding across pages */
5991 res.acl_scratch = alloc_page(GFP_KERNEL);
5992 if (!res.acl_scratch)
5993 goto out_free;
5994
bf118a34 5995 args.acl_len = npages * PAGE_SIZE;
5a006899 5996
de040bec 5997 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 5998 __func__, buf, buflen, npages, args.acl_len);
5999 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
6000 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 6001 if (ret)
6002 goto out_free;
bf118a34 6003
1f1ea6c2
TM		 6004 /* Handle the case where the passed-in buffer is too short */
6005 if (res.acl_flags & NFS4_ACL_TRUNC) {
6006 /* Did the user only issue a request for the acl length? */
6007 if (buf == NULL)
6008 goto out_ok;
e50a1c2e 6009 ret = -ERANGE;
1f1ea6c2 6010 goto out_free;
e50a1c2e 6011 }
7b8b44eb
TM		 6012 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len,
6013 type);
7d3e91a8
SW		 6014 if (buf) {
6015 if (res.acl_len > buflen) {
6016 ret = -ERANGE;
6017 goto out_free;
6018 }
1f1ea6c2 6019 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 6020 }
1f1ea6c2
TM		 6021out_ok:
6022 ret = res.acl_len;
e50a1c2e 6023out_free:
f4e89f1a
FP		 6024 while (--i >= 0)
6025 __free_page(pages[i]);
331818f1
TM		 6026 if (res.acl_scratch)
6027 __free_page(res.acl_scratch);
62a1573f 6028 kfree(pages);
aa1870af
BF		 6029 return ret;
6030}
6031
7b8b44eb
TM		 6032static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf,
6033 size_t buflen, enum nfs4_acl_type type)
16b4289c 6034{
0688e64b
TM		 6035 struct nfs4_exception exception = {
6036 .interruptible = true,
6037 };
16b4289c
TM		 6038 ssize_t ret;
6039 do {
7b8b44eb 6040 ret = __nfs4_get_acl_uncached(inode, buf, buflen, type);
c1578b76 6041 trace_nfs4_get_acl(inode, ret);
16b4289c
TM		 6042 if (ret >= 0)
6043 break;
6044 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
6045 } while (exception.retry);
6046 return ret;
6047}
6048
7b8b44eb
TM		 6049static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen,
6050 enum nfs4_acl_type type)
e50a1c2e
BF		 6051{
6052 struct nfs_server *server = NFS_SERVER(inode);
6053 int ret;
6054
7b8b44eb 6055 if (!nfs4_server_supports_acls(server, type))
e50a1c2e 6056 return -EOPNOTSUPP;
1f3208b2 6057 ret = nfs_revalidate_inode(inode, NFS_INO_INVALID_CHANGE);
e50a1c2e
BF		 6058 if (ret < 0)
6059 return ret;
08a22b39
AK		 6060 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
6061 nfs_zap_acl_cache(inode);
7b8b44eb 6062 ret = nfs4_read_cached_acl(inode, buf, buflen, type);
e50a1c2e 6063 if (ret != -ENOENT)
bf118a34
AA		 6064 /* -ENOENT is returned if there is no ACL or if there is an ACL
6065 * but no cached acl data, just the acl length */
e50a1c2e 6066 return ret;
7b8b44eb 6067 return nfs4_get_acl_uncached(inode, buf, buflen, type);
e50a1c2e
BF		 6068}
6069
7b8b44eb
TM		 6070static int __nfs4_proc_set_acl(struct inode *inode, const void *buf,
6071 size_t buflen, enum nfs4_acl_type type)
4b580ee3
BF		 6072{
6073 struct nfs_server *server = NFS_SERVER(inode);
6074 struct page *pages[NFS4ACL_MAXPAGES];
6075 struct nfs_setaclargs arg = {
db145db0
TM		 6076 .fh = NFS_FH(inode),
6077 .acl_type = type,
6078 .acl_len = buflen,
6079 .acl_pages = pages,
4b580ee3 6080 };
73c403a9 6081 struct nfs_setaclres res;
4b580ee3
BF		 6082 struct rpc_message msg = {
6083 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
6084 .rpc_argp = &arg,
73c403a9 6085 .rpc_resp = &res,
4b580ee3 6086 };
21f498c2 6087 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 6088 int ret, i;
4b580ee3 6089
4f8be1f5
BF		 6090 /* You can't remove system.nfs4_acl: */
6091 if (buflen == 0)
6092 return -EINVAL;
7b8b44eb 6093 if (!nfs4_server_supports_acls(server, type))
4b580ee3 6094 return -EOPNOTSUPP;
21f498c2
TM		 6095 if (npages > ARRAY_SIZE(pages))
6096 return -ERANGE;
ccde1e9c 6097 i = nfs4_buf_to_pages_noslab(buf, buflen, arg.acl_pages);
e9e3d724
NH		 6098 if (i < 0)
6099 return i;
c01d3645 6100 nfs4_inode_make_writeable(inode);
7c513058 6101 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 6102
6103 /*
6104 * Free each page after tx, so the only ref left is
6105 * held by the network stack
6106 */
6107 for (; i > 0; i--)
6108 put_page(pages[i-1]);
6109
08a22b39
AK		 6110 /*
6111 * Acl update can result in inode attribute update.
6112 * so mark the attribute cache invalid.
6113 */
6114 spin_lock(&inode->i_lock);
b6f80a2e
TM		 6115 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE |
6116 NFS_INO_INVALID_CTIME |
6117 NFS_INO_REVAL_FORCED);
08a22b39 6118 spin_unlock(&inode->i_lock);
f41f7418
TM		 6119 nfs_access_zap_cache(inode);
6120 nfs_zap_acl_cache(inode);
4b580ee3
BF		 6121 return ret;
6122}
6123
7b8b44eb
TM		 6124static int nfs4_proc_set_acl(struct inode *inode, const void *buf,
6125 size_t buflen, enum nfs4_acl_type type)
16b4289c
TM		 6126{
6127 struct nfs4_exception exception = { };
6128 int err;
6129 do {
7b8b44eb 6130 err = __nfs4_proc_set_acl(inode, buf, buflen, type);
c1578b76 6131 trace_nfs4_set_acl(inode, err);
f8849e20
DN		 6132 if (err == -NFS4ERR_BADOWNER || err == -NFS4ERR_BADNAME) {
6133 /*
6134 * no need to retry since the kernel
6135 * isn't involved in encoding the ACEs.
6136 */
6137 err = -EINVAL;
6138 break;
6139 }
c1578b76 6140 err = nfs4_handle_exception(NFS_SERVER(inode), err,
16b4289c
TM		 6141 &exception);
6142 } while (exception.retry);
6143 return err;
6144}
6145
aa9c2669
DQ		 6146#ifdef CONFIG_NFS_V4_SECURITY_LABEL
6147static int _nfs4_get_security_label(struct inode *inode, void *buf,
6148 size_t buflen)
6149{
6150 struct nfs_server *server = NFS_SERVER(inode);
aa9c2669
DQ		 6151 struct nfs4_label label = {0, 0, buflen, buf};
6152
6153 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
2ef61e0e
AS		 6154 struct nfs_fattr fattr = {
6155 .label = &label,
6156 };
fcb63a9b 6157 struct nfs4_getattr_arg arg = {
aa9c2669
DQ		 6158 .fh = NFS_FH(inode),
6159 .bitmask = bitmask,
6160 };
6161 struct nfs4_getattr_res res = {
6162 .fattr = &fattr,
aa9c2669
DQ		 6163 .server = server,
6164 };
6165 struct rpc_message msg = {
6166 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
fcb63a9b 6167 .rpc_argp = &arg,
aa9c2669
DQ		 6168 .rpc_resp = &res,
6169 };
6170 int ret;
6171
6172 nfs_fattr_init(&fattr);
6173
fcb63a9b 6174 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
aa9c2669
DQ		 6175 if (ret)
6176 return ret;
6177 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
6178 return -ENOENT;
53cb2454 6179 return label.len;
aa9c2669
DQ		 6180}
6181
6182static int nfs4_get_security_label(struct inode *inode, void *buf,
6183 size_t buflen)
6184{
0688e64b
TM		 6185 struct nfs4_exception exception = {
6186 .interruptible = true,
6187 };
aa9c2669
DQ		 6188 int err;
6189
6190 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
6191 return -EOPNOTSUPP;
6192
6193 do {
c1578b76
TM		 6194 err = _nfs4_get_security_label(inode, buf, buflen);
6195 trace_nfs4_get_security_label(inode, err);
6196 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 6197 &exception);
6198 } while (exception.retry);
6199 return err;
6200}
6201
6202static int _nfs4_do_set_security_label(struct inode *inode,
6203 struct nfs4_label *ilabel,
1b00ad65 6204 struct nfs_fattr *fattr)
aa9c2669
DQ		 6205{
6206
6207 struct iattr sattr = {0};
6208 struct nfs_server *server = NFS_SERVER(inode);
6209 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
12207f69 6210 struct nfs_setattrargs arg = {
d9b67e1e
AS		 6211 .fh = NFS_FH(inode),
6212 .iap = &sattr,
aa9c2669
DQ		 6213 .server = server,
6214 .bitmask = bitmask,
6215 .label = ilabel,
6216 };
6217 struct nfs_setattrres res = {
6218 .fattr = fattr,
aa9c2669
DQ		 6219 .server = server,
6220 };
6221 struct rpc_message msg = {
d9b67e1e
AS		 6222 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
6223 .rpc_argp = &arg,
6224 .rpc_resp = &res,
aa9c2669
DQ		 6225 };
6226 int status;
6227
12207f69 6228 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
aa9c2669 6229
12207f69 6230 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
aa9c2669
DQ		 6231 if (status)
6232 dprintk("%s failed: %d\n", __func__, status);
6233
6234 return status;
6235}
6236
6237static int nfs4_do_set_security_label(struct inode *inode,
6238 struct nfs4_label *ilabel,
1b00ad65 6239 struct nfs_fattr *fattr)
aa9c2669
DQ		 6240{
6241 struct nfs4_exception exception = { };
6242 int err;
6243
6244 do {
1b00ad65 6245 err = _nfs4_do_set_security_label(inode, ilabel, fattr);
c1578b76
TM		 6246 trace_nfs4_set_security_label(inode, err);
6247 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 6248 &exception);
6249 } while (exception.retry);
6250 return err;
6251}
6252
6253static int
59301226 6254nfs4_set_security_label(struct inode *inode, const void *buf, size_t buflen)
aa9c2669 6255{
1b00ad65
AS		 6256 struct nfs4_label ilabel = {0, 0, buflen, (char *)buf };
6257 struct nfs_fattr *fattr;
aa9c2669
DQ		 6258 int status;
6259
6260 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
6261 return -EOPNOTSUPP;
6262
1b00ad65
AS		 6263 fattr = nfs_alloc_fattr_with_label(NFS_SERVER(inode));
6264 if (fattr == NULL)
6265 return -ENOMEM;
aa9c2669 6266
1b00ad65 6267 status = nfs4_do_set_security_label(inode, &ilabel, fattr);
aa9c2669 6268 if (status == 0)
dd225cb3 6269 nfs_setsecurity(inode, fattr);
aa9c2669 6270
aa9c2669
DQ		 6271 return status;
6272}
6273#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
6274
6275
f092075d
CL		 6276static void nfs4_init_boot_verifier(const struct nfs_client *clp,
6277 nfs4_verifier *bootverf)
cd93710e
CL		 6278{
6279 __be32 verf[2];
6280
2c820d9a
CL		 6281 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
6282 /* An impossible timestamp guarantees this value
6283 * will never match a generated boot time. */
2f86e091
DD		 6284 verf[0] = cpu_to_be32(U32_MAX);
6285 verf[1] = cpu_to_be32(U32_MAX);
2c820d9a 6286 } else {
f092075d 6287 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
2f86e091
DD		 6288 u64 ns = ktime_to_ns(nn->boot_time);
6289
6290 verf[0] = cpu_to_be32(ns >> 32);
6291 verf[1] = cpu_to_be32(ns);
2c820d9a 6292 }
cd93710e
CL		 6293 memcpy(bootverf->data, verf, sizeof(bootverf->data));
6294}
6295
1aee5513 6296static size_t
39d43d16 6297nfs4_get_uniquifier(struct nfs_client *clp, char *buf, size_t buflen)
1aee5513 6298{
39d43d16
TM		 6299 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
6300 struct nfs_netns_client *nn_clp = nn->nfs_client;
6301 const char *id;
6302
1aee5513
TM		 6303 buf[0] = '\0';
6304
39d43d16
TM		 6305 if (nn_clp) {
6306 rcu_read_lock();
6307 id = rcu_dereference(nn_clp->identifier);
6308 if (id)
6309 strscpy(buf, id, buflen);
6310 rcu_read_unlock();
6311 }
6312
6313 if (nfs4_client_id_uniquifier[0] != '\0' && buf[0] == '\0')
1aee5513
TM		 6314 strscpy(buf, nfs4_client_id_uniquifier, buflen);
6315
6316 return strlen(buf);
6317}
6318
a3192688
JL		 6319static int
6320nfs4_init_nonuniform_client_string(struct nfs_client *clp)
e984a55a 6321{
1aee5513
TM		 6322 char buf[NFS4_CLIENT_ID_UNIQ_LEN];
6323 size_t buflen;
a3192688
JL		 6324 size_t len;
6325 char *str;
e984a55a 6326
ceb3a16c 6327 if (clp->cl_owner_id != NULL)
a3192688 6328 return 0;
4a3e5779 6329
a3192688 6330 rcu_read_lock();
848a4eb2
CL		 6331 len = 14 +
6332 strlen(clp->cl_rpcclient->cl_nodename) +
6333 1 +
a3192688 6334 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) +
a3192688
JL		 6335 1;
6336 rcu_read_unlock();
1aee5513 6337
39d43d16 6338 buflen = nfs4_get_uniquifier(clp, buf, sizeof(buf));
1aee5513
TM		 6339 if (buflen)
6340 len += buflen + 1;
6341
a3192688
JL		 6342 if (len > NFS4_OPAQUE_LIMIT + 1)
6343 return -EINVAL;
6344
6345 /*
6346 * Since this string is allocated at mount time, and held until the
6347 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
6348 * about a memory-reclaim deadlock.
6349 */
6350 str = kmalloc(len, GFP_KERNEL);
6351 if (!str)
6352 return -ENOMEM;
ceb3a16c 6353
e984a55a 6354 rcu_read_lock();
1aee5513 6355 if (buflen)
025bb9f8 6356 scnprintf(str, len, "Linux NFSv4.0 %s/%s/%s",
1aee5513 6357 clp->cl_rpcclient->cl_nodename, buf,
848a4eb2 6358 rpc_peeraddr2str(clp->cl_rpcclient,
025bb9f8 6359 RPC_DISPLAY_ADDR));
848a4eb2 6360 else
025bb9f8 6361 scnprintf(str, len, "Linux NFSv4.0 %s/%s",
848a4eb2
CL		 6362 clp->cl_rpcclient->cl_nodename,
6363 rpc_peeraddr2str(clp->cl_rpcclient,
025bb9f8 6364 RPC_DISPLAY_ADDR));
e984a55a 6365 rcu_read_unlock();
a3192688 6366
a3192688
JL		 6367 clp->cl_owner_id = str;
6368 return 0;
e984a55a
CL		 6369}
6370
873e3851
JL		 6371static int
6372nfs4_init_uniform_client_string(struct nfs_client *clp)
e984a55a 6373{
1aee5513
TM		 6374 char buf[NFS4_CLIENT_ID_UNIQ_LEN];
6375 size_t buflen;
873e3851
JL		 6376 size_t len;
6377 char *str;
ceb3a16c
TM		 6378
6379 if (clp->cl_owner_id != NULL)
873e3851 6380 return 0;
6f2ea7f2 6381
873e3851
JL		 6382 len = 10 + 10 + 1 + 10 + 1 +
6383 strlen(clp->cl_rpcclient->cl_nodename) + 1;
6384
39d43d16 6385 buflen = nfs4_get_uniquifier(clp, buf, sizeof(buf));
1aee5513
TM		 6386 if (buflen)
6387 len += buflen + 1;
6388
873e3851
JL		 6389 if (len > NFS4_OPAQUE_LIMIT + 1)
6390 return -EINVAL;
6391
6392 /*
6393 * Since this string is allocated at mount time, and held until the
6394 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
6395 * about a memory-reclaim deadlock.
6396 */
6397 str = kmalloc(len, GFP_KERNEL);
6398 if (!str)
6399 return -ENOMEM;
6400
1aee5513
TM		 6401 if (buflen)
6402 scnprintf(str, len, "Linux NFSv%u.%u %s/%s",
6403 clp->rpc_ops->version, clp->cl_minorversion,
6404 buf, clp->cl_rpcclient->cl_nodename);
6405 else
6406 scnprintf(str, len, "Linux NFSv%u.%u %s",
6407 clp->rpc_ops->version, clp->cl_minorversion,
6408 clp->cl_rpcclient->cl_nodename);
873e3851
JL		 6409 clp->cl_owner_id = str;
6410 return 0;
e984a55a
CL		 6411}
6412
706cb8db
CL		 6413/*
6414 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
6415 * services. Advertise one based on the address family of the
6416 * clientaddr.
6417 */
6418static unsigned int
6419nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
6420{
6421 if (strchr(clp->cl_ipaddr, ':') != NULL)
6422 return scnprintf(buf, len, "tcp6");
6423 else
6424 return scnprintf(buf, len, "tcp");
6425}
6426
f11b2a1c
JL		 6427static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
6428{
6429 struct nfs4_setclientid *sc = calldata;
6430
6431 if (task->tk_status == 0)
6432 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
6433}
6434
6435static const struct rpc_call_ops nfs4_setclientid_ops = {
6436 .rpc_call_done = nfs4_setclientid_done,
6437};
6438
6bbb4ae8
CL		 6439/**
6440 * nfs4_proc_setclientid - Negotiate client ID
6441 * @clp: state data structure
6442 * @program: RPC program for NFSv4 callback service
6443 * @port: IP port number for NFS4 callback service
a52458b4 6444 * @cred: credential to use for this call
6bbb4ae8
CL		 6445 * @res: where to place the result
6446 *
6447 * Returns zero, a negative errno, or a negative NFS4ERR status code.
6448 */
bb8b27e5 6449int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
a52458b4 6450 unsigned short port, const struct cred *cred,
bb8b27e5 6451 struct nfs4_setclientid_res *res)
1da177e4
LT		 6452{
6453 nfs4_verifier sc_verifier;
6454 struct nfs4_setclientid setclientid = {
6455 .sc_verifier = &sc_verifier,
6456 .sc_prog = program,
3a6bb738 6457 .sc_clnt = clp,
1da177e4
LT		 6458 };
6459 struct rpc_message msg = {
6460 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
6461 .rpc_argp = &setclientid,
bb8b27e5 6462 .rpc_resp = res,
286d7d6a 6463 .rpc_cred = cred,
1da177e4 6464 };
f11b2a1c
JL		 6465 struct rpc_task_setup task_setup_data = {
6466 .rpc_client = clp->cl_rpcclient,
6467 .rpc_message = &msg,
6468 .callback_ops = &nfs4_setclientid_ops,
6469 .callback_data = &setclientid,
5a0c257f 6470 .flags = RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN,
f11b2a1c 6471 };
7dc2993a 6472 unsigned long now = jiffies;
6bbb4ae8 6473 int status;
1da177e4 6474
de734831 6475 /* nfs_client_id4 */
f092075d 6476 nfs4_init_boot_verifier(clp, &sc_verifier);
873e3851
JL		 6477
6478 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
6479 status = nfs4_init_uniform_client_string(clp);
6480 else
a3192688 6481 status = nfs4_init_nonuniform_client_string(clp);
873e3851
JL		 6482
6483 if (status)
6484 goto out;
3a6bb738 6485
de734831 6486 /* cb_client4 */
706cb8db
CL		 6487 setclientid.sc_netid_len =
6488 nfs4_init_callback_netid(clp,
6489 setclientid.sc_netid,
6490 sizeof(setclientid.sc_netid));
de734831 6491 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 6492 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 6493 clp->cl_ipaddr, port >> 8, port & 255);
6494
3a6bb738 6495 dprintk("NFS call setclientid auth=%s, '%s'\n",
6bbb4ae8 6496 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3a6bb738 6497 clp->cl_owner_id);
dae40965
AS		 6498
6499 status = nfs4_call_sync_custom(&task_setup_data);
f11b2a1c 6500 if (setclientid.sc_cred) {
1047ec86 6501 kfree(clp->cl_acceptor);
f11b2a1c
JL		 6502 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
6503 put_rpccred(setclientid.sc_cred);
6504 }
7dc2993a
RM		 6505
6506 if (status == 0)
6507 do_renew_lease(clp, now);
f11b2a1c 6508out:
c6d01c6f 6509 trace_nfs4_setclientid(clp, status);
6bbb4ae8
CL		 6510 dprintk("NFS reply setclientid: %d\n", status);
6511 return status;
1da177e4
LT		 6512}
6513
6bbb4ae8
CL		 6514/**
6515 * nfs4_proc_setclientid_confirm - Confirm client ID
6516 * @clp: state data structure
302fad7b 6517 * @arg: result of a previous SETCLIENTID
a52458b4 6518 * @cred: credential to use for this call
6bbb4ae8
CL		 6519 *
6520 * Returns zero, a negative errno, or a negative NFS4ERR status code.
6521 */
fd954ae1 6522int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5 6523 struct nfs4_setclientid_res *arg,
a52458b4 6524 const struct cred *cred)
1da177e4 6525{
1da177e4
LT		 6526 struct rpc_message msg = {
6527 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 6528 .rpc_argp = arg,
286d7d6a 6529 .rpc_cred = cred,
1da177e4 6530 };
1da177e4
LT		 6531 int status;
6532
6bbb4ae8
CL		 6533 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
6534 clp->cl_rpcclient->cl_auth->au_ops->au_name,
6535 clp->cl_clientid);
5a0c257f
N		 6536 status = rpc_call_sync(clp->cl_rpcclient, &msg,
6537 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN);
c6d01c6f 6538 trace_nfs4_setclientid_confirm(clp, status);
6bbb4ae8 6539 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 6540 return status;
6541}
6542
fe650407
TM		 6543struct nfs4_delegreturndata {
6544 struct nfs4_delegreturnargs args;
fa178f29 6545 struct nfs4_delegreturnres res;
fe650407
TM		 6546 struct nfs_fh fh;
6547 nfs4_stateid stateid;
26e976a8 6548 unsigned long timestamp;
586f1c39
TM		 6549 struct {
6550 struct nfs4_layoutreturn_args arg;
6551 struct nfs4_layoutreturn_res res;
4d796d75 6552 struct nfs4_xdr_opaque_data ld_private;
586f1c39
TM		 6553 u32 roc_barrier;
6554 bool roc;
6555 } lr;
fa178f29 6556 struct nfs_fattr fattr;
fe650407 6557 int rpc_status;
039b756a 6558 struct inode *inode;
fe650407
TM		 6559};
6560
fe650407
TM		 6561static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
6562{
6563 struct nfs4_delegreturndata *data = calldata;
e0dba012
TM		 6564 struct nfs4_exception exception = {
6565 .inode = data->inode,
6566 .stateid = &data->stateid,
dfe1fe75 6567 .task_is_privileged = data->args.seq_args.sa_privileged,
e0dba012 6568 };
938e1010 6569
14516c3a
TM		 6570 if (!nfs4_sequence_done(task, &data->res.seq_res))
6571 return;
938e1010 6572
ca8acf8d 6573 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
586f1c39
TM		 6574
6575 /* Handle Layoutreturn errors */
078000d0
TM		 6576 if (pnfs_roc_done(task, &data->args.lr_args, &data->res.lr_res,
6577 &data->res.lr_ret) == -EAGAIN)
287a9c55 6578 goto out_restart;
586f1c39 6579
79708861 6580 switch (task->tk_status) {
79708861 6581 case 0:
fa178f29 6582 renew_lease(data->res.server, data->timestamp);
23ea44c2 6583 break;
c97cf606
TM		 6584 case -NFS4ERR_ADMIN_REVOKED:
6585 case -NFS4ERR_DELEG_REVOKED:
26d36301
TM		 6586 case -NFS4ERR_EXPIRED:
6587 nfs4_free_revoked_stateid(data->res.server,
6588 data->args.stateid,
6589 task->tk_msg.rpc_cred);
df561f66 6590 fallthrough;
c97cf606 6591 case -NFS4ERR_BAD_STATEID:
c97cf606 6592 case -NFS4ERR_STALE_STATEID:
244fcd2f 6593 case -ETIMEDOUT:
c97cf606
TM		 6594 task->tk_status = 0;
6595 break;
12f275cd 6596 case -NFS4ERR_OLD_STATEID:
246afc0a
TM		 6597 if (!nfs4_refresh_delegation_stateid(&data->stateid, data->inode))
6598 nfs4_stateid_seqid_inc(&data->stateid);
70d136b2
TM		 6599 if (data->args.bitmask) {
6600 data->args.bitmask = NULL;
6601 data->res.fattr = NULL;
6602 }
246afc0a 6603 goto out_restart;
8ac2b422
TM		 6604 case -NFS4ERR_ACCESS:
6605 if (data->args.bitmask) {
6606 data->args.bitmask = NULL;
6607 data->res.fattr = NULL;
140087fd 6608 goto out_restart;
8ac2b422 6609 }
df561f66 6610 fallthrough;
79708861 6611 default:
e0dba012
TM		 6612 task->tk_status = nfs4_async_handle_exception(task,
6613 data->res.server, task->tk_status,
6614 &exception);
6615 if (exception.retry)
140087fd 6616 goto out_restart;
79708861 6617 }
d51f91d2 6618 nfs_delegation_mark_returned(data->inode, data->args.stateid);
79708861 6619 data->rpc_status = task->tk_status;
140087fd 6620 return;
140087fd
TM		 6621out_restart:
6622 task->tk_status = 0;
6623 rpc_restart_call_prepare(task);
fe650407
TM		 6624}
6625
6626static void nfs4_delegreturn_release(void *calldata)
6627{
039b756a 6628 struct nfs4_delegreturndata *data = calldata;
ea7c38fe 6629 struct inode *inode = data->inode;
039b756a 6630
078000d0
TM		 6631 if (data->lr.roc)
6632 pnfs_roc_release(&data->lr.arg, &data->lr.res,
6633 data->res.lr_ret);
ea7c38fe 6634 if (inode) {
00c94ebe
TM		 6635 nfs4_fattr_set_prechange(&data->fattr,
6636 inode_peek_iversion_raw(inode));
6637 nfs_refresh_inode(inode, &data->fattr);
ea7c38fe
TM		 6638 nfs_iput_and_deactive(inode);
6639 }
fe650407
TM		 6640 kfree(calldata);
6641}
6642
938e1010
AA		 6643static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
6644{
6645 struct nfs4_delegreturndata *d_data;
c8bf7073 6646 struct pnfs_layout_hdr *lo;
938e1010 6647
7e7ce2cc 6648 d_data = data;
938e1010 6649
5326de9e
TM		 6650 if (!d_data->lr.roc && nfs4_wait_on_layoutreturn(d_data->inode, task)) {
6651 nfs4_sequence_done(task, &d_data->res.seq_res);
500d701f 6652 return;
5326de9e 6653 }
500d701f 6654
c8bf7073
TM		 6655 lo = d_data->args.lr_args ? d_data->args.lr_args->layout : NULL;
6656 if (lo && !pnfs_layout_is_valid(lo)) {
6657 d_data->args.lr_args = NULL;
6658 d_data->res.lr_res = NULL;
6659 }
6660
42e1cca7 6661 nfs4_setup_sequence(d_data->res.server->nfs_client,
d9afbd1b
TM		 6662 &d_data->args.seq_args,
6663 &d_data->res.seq_res,
6664 task);
938e1010 6665}
938e1010 6666
c8d149f3 6667static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010 6668 .rpc_call_prepare = nfs4_delegreturn_prepare,
fe650407
TM		 6669 .rpc_call_done = nfs4_delegreturn_done,
6670 .rpc_release = nfs4_delegreturn_release,
6671};
6672
a52458b4 6673static int _nfs4_proc_delegreturn(struct inode *inode, const struct cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 6674{
6675 struct nfs4_delegreturndata *data;
fa178f29 6676 struct nfs_server *server = NFS_SERVER(inode);
fe650407 6677 struct rpc_task *task;
5138fde0
TM		 6678 struct rpc_message msg = {
6679 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
6680 .rpc_cred = cred,
6681 };
c970aa85
TM		 6682 struct rpc_task_setup task_setup_data = {
6683 .rpc_client = server->client,
5138fde0 6684 .rpc_message = &msg,
c970aa85 6685 .callback_ops = &nfs4_delegreturn_ops,
118f09ed 6686 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
c970aa85 6687 };
e6f81075 6688 int status = 0;
fe650407 6689
118f09ed
OK		 6690 if (nfs_server_capable(inode, NFS_CAP_MOVEABLE))
6691 task_setup_data.flags |= RPC_TASK_MOVEABLE;
6692
da48f267 6693 data = kzalloc(sizeof(*data), GFP_KERNEL);
fe650407
TM		 6694 if (data == NULL)
6695 return -ENOMEM;
99ade3c7
AE		 6696
6697 nfs4_state_protect(server->nfs_client,
6698 NFS_SP4_MACH_CRED_CLEANUP,
6699 &task_setup_data.rpc_client, &msg);
6700
fe650407
TM		 6701 data->args.fhandle = &data->fh;
6702 data->args.stateid = &data->stateid;
332d1a03 6703 nfs4_bitmask_set(data->args.bitmask_store,
85847280 6704 server->cache_consistency_bitmask, inode, 0);
332d1a03 6705 data->args.bitmask = data->args.bitmask_store;
fe650407 6706 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 6707 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 6708 data->res.fattr = &data->fattr;
6709 data->res.server = server;
586f1c39 6710 data->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
4d796d75 6711 data->lr.arg.ld_private = &data->lr.ld_private;
5138fde0 6712 nfs_fattr_init(data->res.fattr);
26e976a8 6713 data->timestamp = jiffies;
fe650407 6714 data->rpc_status = 0;
ea7c38fe 6715 data->inode = nfs_igrab_and_active(inode);
078000d0
TM		 6716 if (data->inode || issync) {
6717 data->lr.roc = pnfs_roc(inode, &data->lr.arg, &data->lr.res,
6718 cred);
1c5bd76d
TM		 6719 if (data->lr.roc) {
6720 data->args.lr_args = &data->lr.arg;
6721 data->res.lr_res = &data->lr.res;
6722 }
6723 }
fe650407 6724
dfe1fe75
TM		 6725 if (!data->inode)
6726 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1,
6727 1);
6728 else
6729 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1,
6730 0);
c970aa85 6731 task_setup_data.callback_data = data;
1174dd1f
TM		 6732 msg.rpc_argp = &data->args;
6733 msg.rpc_resp = &data->res;
c970aa85 6734 task = rpc_run_task(&task_setup_data);
7a1218a2 6735 if (IS_ERR(task))
fe650407 6736 return PTR_ERR(task);
e6f81075
TM		 6737 if (!issync)
6738 goto out;
820bf85c 6739 status = rpc_wait_for_completion_task(task);
e6f81075
TM		 6740 if (status != 0)
6741 goto out;
6742 status = data->rpc_status;
e6f81075 6743out:
e6b3c4db 6744 rpc_put_task(task);
fe650407 6745 return status;
1da177e4
LT		 6746}
6747
a52458b4 6748int nfs4_proc_delegreturn(struct inode *inode, const struct cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 6749{
6750 struct nfs_server *server = NFS_SERVER(inode);
6751 struct nfs4_exception exception = { };
6752 int err;
6753 do {
e6f81075 6754 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
48c9579a 6755 trace_nfs4_delegreturn(inode, stateid, err);
1da177e4
LT		 6756 switch (err) {
6757 case -NFS4ERR_STALE_STATEID:
6758 case -NFS4ERR_EXPIRED:
1da177e4
LT		 6759 case 0:
6760 return 0;
6761 }
6762 err = nfs4_handle_exception(server, err, &exception);
6763 } while (exception.retry);
6764 return err;
6765}
6766
1da177e4
LT		 6767static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6768{
6769 struct inode *inode = state->inode;
6770 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 6771 struct nfs_client *clp = server->nfs_client;
911d1aaf 6772 struct nfs_lockt_args arg = {
1da177e4 6773 .fh = NFS_FH(inode),
911d1aaf 6774 .fl = request,
1da177e4 6775 };
911d1aaf
TM		 6776 struct nfs_lockt_res res = {
6777 .denied = request,
1da177e4
LT		 6778 };
6779 struct rpc_message msg = {
6780 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
d9b67e1e
AS		 6781 .rpc_argp = &arg,
6782 .rpc_resp = &res,
1da177e4
LT		 6783 .rpc_cred = state->owner->so_cred,
6784 };
1da177e4
LT		 6785 struct nfs4_lock_state *lsp;
6786 int status;
6787
911d1aaf 6788 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 6789 status = nfs4_set_lock_state(state, request);
6790 if (status != 0)
6791 goto out;
6792 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 6793 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 6794 arg.lock_owner.s_dev = server->s_dev;
7c513058 6795 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 6796 switch (status) {
6797 case 0:
dd1fac6a 6798 request->c.flc_type = F_UNLCK;
911d1aaf
TM		 6799 break;
6800 case -NFS4ERR_DENIED:
6801 status = 0;
1da177e4 6802 }
70cc6487 6803 request->fl_ops->fl_release_private(request);
a6f951dd 6804 request->fl_ops = NULL;
8d0a8a9d 6805out:
1da177e4
LT		 6806 return status;
6807}
6808
6809static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6810{
0688e64b
TM		 6811 struct nfs4_exception exception = {
6812 .interruptible = true,
6813 };
1da177e4
LT		 6814 int err;
6815
6816 do {
d1b748a5
TM		 6817 err = _nfs4_proc_getlk(state, cmd, request);
6818 trace_nfs4_get_lock(request, state, cmd, err);
6819 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
1da177e4
LT		 6820 &exception);
6821 } while (exception.retry);
6822 return err;
6823}
6824
32c6e7ee
TM		 6825/*
6826 * Update the seqid of a lock stateid after receiving
6827 * NFS4ERR_OLD_STATEID
6828 */
6829static bool nfs4_refresh_lock_old_stateid(nfs4_stateid *dst,
6830 struct nfs4_lock_state *lsp)
6831{
6832 struct nfs4_state *state = lsp->ls_state;
6833 bool ret = false;
6834
6835 spin_lock(&state->state_lock);
6836 if (!nfs4_stateid_match_other(dst, &lsp->ls_stateid))
6837 goto out;
6838 if (!nfs4_stateid_is_newer(&lsp->ls_stateid, dst))
6839 nfs4_stateid_seqid_inc(dst);
6840 else
6841 dst->seqid = lsp->ls_stateid.seqid;
6842 ret = true;
6843out:
6844 spin_unlock(&state->state_lock);
6845 return ret;
6846}
6847
6848static bool nfs4_sync_lock_stateid(nfs4_stateid *dst,
6849 struct nfs4_lock_state *lsp)
6850{
6851 struct nfs4_state *state = lsp->ls_state;
6852 bool ret;
6853
6854 spin_lock(&state->state_lock);
6855 ret = !nfs4_stateid_match_other(dst, &lsp->ls_stateid);
6856 nfs4_stateid_copy(dst, &lsp->ls_stateid);
6857 spin_unlock(&state->state_lock);
6858 return ret;
6859}
6860
faf5f49c 6861struct nfs4_unlockdata {
911d1aaf
TM		 6862 struct nfs_locku_args arg;
6863 struct nfs_locku_res res;
faf5f49c
TM		 6864 struct nfs4_lock_state *lsp;
6865 struct nfs_open_context *ctx;
f30cb757 6866 struct nfs_lock_context *l_ctx;
911d1aaf 6867 struct file_lock fl;
516285eb 6868 struct nfs_server *server;
26e976a8 6869 unsigned long timestamp;
faf5f49c
TM		 6870};
6871
911d1aaf
TM		 6872static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
6873 struct nfs_open_context *ctx,
6874 struct nfs4_lock_state *lsp,
6875 struct nfs_seqid *seqid)
6876{
6877 struct nfs4_unlockdata *p;
32c6e7ee
TM		 6878 struct nfs4_state *state = lsp->ls_state;
6879 struct inode *inode = state->inode;
911d1aaf 6880
da48f267 6881 p = kzalloc(sizeof(*p), GFP_KERNEL);
911d1aaf
TM		 6882 if (p == NULL)
6883 return NULL;
6884 p->arg.fh = NFS_FH(inode);
6885 p->arg.fl = &p->fl;
6886 p->arg.seqid = seqid;
c1d51931 6887 p->res.seqid = seqid;
911d1aaf 6888 p->lsp = lsp;
911d1aaf
TM		 6889 /* Ensure we don't close file until we're done freeing locks! */
6890 p->ctx = get_nfs_open_context(ctx);
f30cb757 6891 p->l_ctx = nfs_get_lock_context(ctx);
7b587e1a
N		 6892 locks_init_lock(&p->fl);
6893 locks_copy_lock(&p->fl, fl);
911d1aaf 6894 p->server = NFS_SERVER(inode);
32c6e7ee
TM		 6895 spin_lock(&state->state_lock);
6896 nfs4_stateid_copy(&p->arg.stateid, &lsp->ls_stateid);
6897 spin_unlock(&state->state_lock);
911d1aaf
TM		 6898 return p;
6899}
6900
06f814a3 6901static void nfs4_locku_release_calldata(void *data)
faf5f49c 6902{
963d8fe5 6903 struct nfs4_unlockdata *calldata = data;
911d1aaf 6904 nfs_free_seqid(calldata->arg.seqid);
06f814a3 6905 nfs4_put_lock_state(calldata->lsp);
f30cb757 6906 nfs_put_lock_context(calldata->l_ctx);
06f814a3
TM		 6907 put_nfs_open_context(calldata->ctx);
6908 kfree(calldata);
faf5f49c
TM		 6909}
6910
963d8fe5 6911static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 6912{
963d8fe5 6913 struct nfs4_unlockdata *calldata = data;
82571552
TM		 6914 struct nfs4_exception exception = {
6915 .inode = calldata->lsp->ls_state->inode,
6916 .stateid = &calldata->arg.stateid,
6917 };
faf5f49c 6918
14516c3a
TM		 6919 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
6920 return;
faf5f49c
TM		 6921 switch (task->tk_status) {
6922 case 0:
26e976a8 6923 renew_lease(calldata->server, calldata->timestamp);
75575ddf 6924 locks_lock_inode_wait(calldata->lsp->ls_state->inode, &calldata->fl);
c69899a1
TM		 6925 if (nfs4_update_lock_stateid(calldata->lsp,
6926 &calldata->res.stateid))
6927 break;
df561f66 6928 fallthrough;
26d36301
TM		 6929 case -NFS4ERR_ADMIN_REVOKED:
6930 case -NFS4ERR_EXPIRED:
6931 nfs4_free_revoked_stateid(calldata->server,
6932 &calldata->arg.stateid,
6933 task->tk_msg.rpc_cred);
df561f66 6934 fallthrough;
9e33bed5 6935 case -NFS4ERR_BAD_STATEID:
faf5f49c 6936 case -NFS4ERR_STALE_STATEID:
32c6e7ee
TM		 6937 if (nfs4_sync_lock_stateid(&calldata->arg.stateid,
6938 calldata->lsp))
6939 rpc_restart_call_prepare(task);
6940 break;
6941 case -NFS4ERR_OLD_STATEID:
6942 if (nfs4_refresh_lock_old_stateid(&calldata->arg.stateid,
6943 calldata->lsp))
425c1d4e 6944 rpc_restart_call_prepare(task);
faf5f49c
TM		 6945 break;
6946 default:
82571552
TM		 6947 task->tk_status = nfs4_async_handle_exception(task,
6948 calldata->server, task->tk_status,
6949 &exception);
6950 if (exception.retry)
d00c5d43 6951 rpc_restart_call_prepare(task);
faf5f49c 6952 }
2b1bc308 6953 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 6954}
6955
4ce70ada 6956static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 6957{
4ce70ada 6958 struct nfs4_unlockdata *calldata = data;
faf5f49c 6959
f30cb757
BC		 6960 if (test_bit(NFS_CONTEXT_UNLOCK, &calldata->l_ctx->open_context->flags) &&
6961 nfs_async_iocounter_wait(task, calldata->l_ctx))
6962 return;
6963
911d1aaf 6964 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 6965 goto out_wait;
795a88c9 6966 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 6967 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 6968 goto out_no_action;
faf5f49c 6969 }
26e976a8 6970 calldata->timestamp = jiffies;
42e1cca7 6971 if (nfs4_setup_sequence(calldata->server->nfs_client,
a893693c 6972 &calldata->arg.seq_args,
2240a9e2
TM		 6973 &calldata->res.seq_res,
6974 task) != 0)
6975 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 6976 return;
6977out_no_action:
6978 task->tk_action = NULL;
6979out_wait:
6980 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 6981}
6982
963d8fe5 6983static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 6984 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 6985 .rpc_call_done = nfs4_locku_done,
06f814a3 6986 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 6987};
6988
a5d16a4d
TM		 6989static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
6990 struct nfs_open_context *ctx,
6991 struct nfs4_lock_state *lsp,
6992 struct nfs_seqid *seqid)
6993{
6994 struct nfs4_unlockdata *data;
5138fde0
TM		 6995 struct rpc_message msg = {
6996 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
6997 .rpc_cred = ctx->cred,
6998 };
c970aa85
TM		 6999 struct rpc_task_setup task_setup_data = {
7000 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 7001 .rpc_message = &msg,
c970aa85 7002 .callback_ops = &nfs4_locku_ops,
101070ca 7003 .workqueue = nfsiod_workqueue,
c970aa85
TM		 7004 .flags = RPC_TASK_ASYNC,
7005 };
85e39fee 7006
118f09ed 7007 if (nfs_server_capable(lsp->ls_state->inode, NFS_CAP_MOVEABLE))
85e39fee 7008 task_setup_data.flags |= RPC_TASK_MOVEABLE;
a5d16a4d 7009
fa940720
WAA		 7010 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
7011 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
7012
137d6aca
FF		 7013 /* Ensure this is an unlock - when canceling a lock, the
7014 * canceled lock is passed in, and it won't be an unlock.
7015 */
dd1fac6a
JL		 7016 fl->c.flc_type = F_UNLCK;
7017 if (fl->c.flc_flags & FL_CLOSE)
f30cb757 7018 set_bit(NFS_CONTEXT_UNLOCK, &ctx->flags);
137d6aca 7019
a5d16a4d
TM		 7020 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
7021 if (data == NULL) {
7022 nfs_free_seqid(seqid);
7023 return ERR_PTR(-ENOMEM);
7024 }
7025
fba83f34 7026 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1, 0);
1174dd1f
TM		 7027 msg.rpc_argp = &data->arg;
7028 msg.rpc_resp = &data->res;
c970aa85
TM		 7029 task_setup_data.callback_data = data;
7030 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 7031}
7032
faf5f49c
TM		 7033static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
7034{
65b62a29
TM		 7035 struct inode *inode = state->inode;
7036 struct nfs4_state_owner *sp = state->owner;
7037 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 7038 struct nfs_seqid *seqid;
1da177e4 7039 struct nfs4_lock_state *lsp;
06f814a3 7040 struct rpc_task *task;
b4019c0e 7041 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
06f814a3 7042 int status = 0;
dd1fac6a 7043 unsigned char saved_flags = request->c.flc_flags;
faf5f49c 7044
8d0a8a9d 7045 status = nfs4_set_lock_state(state, request);
9b073574 7046 /* Unlock _before_ we do the RPC call */
dd1fac6a 7047 request->c.flc_flags |= FL_EXISTS;
65b62a29
TM		 7048 /* Exclude nfs_delegation_claim_locks() */
7049 mutex_lock(&sp->so_delegreturn_mutex);
7050 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57 7051 down_read(&nfsi->rwsem);
75575ddf 7052 if (locks_lock_inode_wait(inode, request) == -ENOENT) {
19e03c57 7053 up_read(&nfsi->rwsem);
65b62a29 7054 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 7055 goto out;
19e03c57 7056 }
ef8d98f2
N		 7057 lsp = request->fl_u.nfs4_fl.owner;
7058 set_bit(NFS_LOCK_UNLOCKING, &lsp->ls_flags);
19e03c57 7059 up_read(&nfsi->rwsem);
65b62a29 7060 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 7061 if (status != 0)
9b073574
TM		 7062 goto out;
7063 /* Is this a delegated lock? */
c5a2a15f
TM		 7064 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
7065 goto out;
b4019c0e
TM		 7066 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid;
7067 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 7068 status = -ENOMEM;
badc76dd 7069 if (IS_ERR(seqid))
9b073574 7070 goto out;
dd1fac6a
JL		 7071 task = nfs4_do_unlck(request,
7072 nfs_file_open_context(request->c.flc_file),
7073 lsp, seqid);
a5d16a4d
TM		 7074 status = PTR_ERR(task);
7075 if (IS_ERR(task))
9b073574 7076 goto out;
820bf85c 7077 status = rpc_wait_for_completion_task(task);
e6b3c4db 7078 rpc_put_task(task);
9b073574 7079out:
dd1fac6a 7080 request->c.flc_flags = saved_flags;
d1b748a5 7081 trace_nfs4_unlock(request, state, F_SETLK, status);
1da177e4
LT		 7082 return status;
7083}
7084
a5d16a4d
TM		 7085struct nfs4_lockdata {
7086 struct nfs_lock_args arg;
7087 struct nfs_lock_res res;
7088 struct nfs4_lock_state *lsp;
7089 struct nfs_open_context *ctx;
7090 struct file_lock fl;
26e976a8 7091 unsigned long timestamp;
a5d16a4d
TM		 7092 int rpc_status;
7093 int cancelled;
66179efe 7094 struct nfs_server *server;
a5d16a4d
TM		 7095};
7096
7097static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 7098 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
7099 gfp_t gfp_mask)
1da177e4 7100{
a5d16a4d
TM		 7101 struct nfs4_lockdata *p;
7102 struct inode *inode = lsp->ls_state->inode;
1da177e4 7103 struct nfs_server *server = NFS_SERVER(inode);
b4019c0e 7104 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
a5d16a4d 7105
8535b2be 7106 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 7107 if (p == NULL)
7108 return NULL;
7109
7110 p->arg.fh = NFS_FH(inode);
7111 p->arg.fl = &p->fl;
8535b2be 7112 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
badc76dd 7113 if (IS_ERR(p->arg.open_seqid))
2f74c0a0 7114 goto out_free;
b4019c0e
TM		 7115 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
7116 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask);
badc76dd 7117 if (IS_ERR(p->arg.lock_seqid))
2f74c0a0 7118 goto out_free_seqid;
7539bbab 7119 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 7120 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 7121 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 7122 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 7123 p->lsp = lsp;
66179efe 7124 p->server = server;
a5d16a4d 7125 p->ctx = get_nfs_open_context(ctx);
7b587e1a
N		 7126 locks_init_lock(&p->fl);
7127 locks_copy_lock(&p->fl, fl);
a5d16a4d 7128 return p;
2f74c0a0
TM		 7129out_free_seqid:
7130 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 7131out_free:
7132 kfree(p);
7133 return NULL;
7134}
7135
7136static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
7137{
7138 struct nfs4_lockdata *data = calldata;
7139 struct nfs4_state *state = data->lsp->ls_state;
06735b34 7140
2f74c0a0 7141 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 7142 goto out_wait;
a5d16a4d 7143 /* Do we need to do an open_to_lock_owner? */
6b447539 7144 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) {
8fe72bac 7145 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 7146 goto out_release_lock_seqid;
8fe72bac 7147 }
425c1d4e
TM		 7148 nfs4_stateid_copy(&data->arg.open_stateid,
7149 &state->open_stateid);
a5d16a4d 7150 data->arg.new_lock_owner = 1;
c1d51931 7151 data->res.open_seqid = data->arg.open_seqid;
425c1d4e 7152 } else {
2f74c0a0 7153 data->arg.new_lock_owner = 0;
425c1d4e
TM		 7154 nfs4_stateid_copy(&data->arg.lock_stateid,
7155 &data->lsp->ls_stateid);
7156 }
5d422301
TM		 7157 if (!nfs4_valid_open_stateid(state)) {
7158 data->rpc_status = -EBADF;
7159 task->tk_action = NULL;
7160 goto out_release_open_seqid;
7161 }
26e976a8 7162 data->timestamp = jiffies;
42e1cca7 7163 if (nfs4_setup_sequence(data->server->nfs_client,
035168ab 7164 &data->arg.seq_args,
2240a9e2 7165 &data->res.seq_res,
d9afbd1b 7166 task) == 0)
66179efe 7167 return;
5d422301 7168out_release_open_seqid:
2240a9e2
TM		 7169 nfs_release_seqid(data->arg.open_seqid);
7170out_release_lock_seqid:
7171 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 7172out_wait:
7173 nfs4_sequence_done(task, &data->res.seq_res);
86882c75 7174 dprintk("%s: ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 7175}
7176
a5d16a4d
TM		 7177static void nfs4_lock_done(struct rpc_task *task, void *calldata)
7178{
7179 struct nfs4_lockdata *data = calldata;
39071e6f 7180 struct nfs4_lock_state *lsp = data->lsp;
a5d16a4d 7181
14516c3a
TM		 7182 if (!nfs4_sequence_done(task, &data->res.seq_res))
7183 return;
66179efe 7184
a5d16a4d 7185 data->rpc_status = task->tk_status;
425c1d4e
TM		 7186 switch (task->tk_status) {
7187 case 0:
5b4a82a0
BC		 7188 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)),
7189 data->timestamp);
a3cf9bca 7190 if (data->arg.new_lock && !data->cancelled) {
dd1fac6a 7191 data->fl.c.flc_flags &= ~(FL_SLEEP | FL_ACCESS);
a3cf9bca 7192 if (locks_lock_inode_wait(lsp->ls_state->inode, &data->fl) < 0)
6ea76bf5 7193 goto out_restart;
c69899a1 7194 }
39071e6f
TM		 7195 if (data->arg.new_lock_owner != 0) {
7196 nfs_confirm_seqid(&lsp->ls_seqid, 0);
7197 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid);
7198 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
6ea76bf5
TM		 7199 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid))
7200 goto out_restart;
425c1d4e 7201 break;
425c1d4e 7202 case -NFS4ERR_OLD_STATEID:
1cbc11aa
BC		 7203 if (data->arg.new_lock_owner != 0 &&
7204 nfs4_refresh_open_old_stateid(&data->arg.open_stateid,
7205 lsp->ls_state))
7206 goto out_restart;
7207 if (nfs4_refresh_lock_old_stateid(&data->arg.lock_stateid, lsp))
7208 goto out_restart;
7209 fallthrough;
7210 case -NFS4ERR_BAD_STATEID:
425c1d4e
TM		 7211 case -NFS4ERR_STALE_STATEID:
7212 case -NFS4ERR_EXPIRED:
7213 if (data->arg.new_lock_owner != 0) {
6ea76bf5 7214 if (!nfs4_stateid_match(&data->arg.open_stateid,
425c1d4e 7215 &lsp->ls_state->open_stateid))
6ea76bf5
TM		 7216 goto out_restart;
7217 } else if (!nfs4_stateid_match(&data->arg.lock_stateid,
425c1d4e 7218 &lsp->ls_stateid))
6ea76bf5 7219 goto out_restart;
a5d16a4d 7220 }
a3cf9bca 7221out_done:
86882c75 7222 dprintk("%s: ret = %d!\n", __func__, data->rpc_status);
6ea76bf5
TM		 7223 return;
7224out_restart:
7225 if (!data->cancelled)
7226 rpc_restart_call_prepare(task);
7227 goto out_done;
a5d16a4d
TM		 7228}
7229
7230static void nfs4_lock_release(void *calldata)
7231{
7232 struct nfs4_lockdata *data = calldata;
7233
2f74c0a0 7234 nfs_free_seqid(data->arg.open_seqid);
6ea76bf5 7235 if (data->cancelled && data->rpc_status == 0) {
a5d16a4d
TM		 7236 struct rpc_task *task;
7237 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
7238 data->arg.lock_seqid);
7239 if (!IS_ERR(task))
bf294b41 7240 rpc_put_task_async(task);
3110ff80 7241 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 7242 } else
7243 nfs_free_seqid(data->arg.lock_seqid);
7244 nfs4_put_lock_state(data->lsp);
7245 put_nfs_open_context(data->ctx);
7246 kfree(data);
a5d16a4d
TM		 7247}
7248
7249static const struct rpc_call_ops nfs4_lock_ops = {
7250 .rpc_call_prepare = nfs4_lock_prepare,
7251 .rpc_call_done = nfs4_lock_done,
7252 .rpc_release = nfs4_lock_release,
7253};
7254
2bee72a6
TM		 7255static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
7256{
2bee72a6
TM		 7257 switch (error) {
7258 case -NFS4ERR_ADMIN_REVOKED:
d7f3e4bf 7259 case -NFS4ERR_EXPIRED:
2bee72a6 7260 case -NFS4ERR_BAD_STATEID:
ecac799a 7261 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 7262 if (new_lock_owner != 0 ||
795a88c9 7263 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 7264 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 7265 break;
7266 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 7267 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a 7268 nfs4_schedule_lease_recovery(server->nfs_client);
8b98a532 7269 }
2bee72a6
TM		 7270}
7271
afe6c27c 7272static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 7273{
7274 struct nfs4_lockdata *data;
7275 struct rpc_task *task;
5138fde0
TM		 7276 struct rpc_message msg = {
7277 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
7278 .rpc_cred = state->owner->so_cred,
7279 };
c970aa85
TM		 7280 struct rpc_task_setup task_setup_data = {
7281 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 7282 .rpc_message = &msg,
c970aa85 7283 .callback_ops = &nfs4_lock_ops,
101070ca 7284 .workqueue = nfsiod_workqueue,
61296507 7285 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF,
c970aa85 7286 };
a5d16a4d 7287 int ret;
85e39fee 7288
118f09ed 7289 if (nfs_server_capable(state->inode, NFS_CAP_MOVEABLE))
85e39fee 7290 task_setup_data.flags |= RPC_TASK_MOVEABLE;
a5d16a4d 7291
dd1fac6a
JL		 7292 data = nfs4_alloc_lockdata(fl,
7293 nfs_file_open_context(fl->c.flc_file),
da48f267 7294 fl->fl_u.nfs4_fl.owner, GFP_KERNEL);
a5d16a4d
TM		 7295 if (data == NULL)
7296 return -ENOMEM;
7297 if (IS_SETLKW(cmd))
7298 data->arg.block = 1;
fba83f34
AS		 7299 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1,
7300 recovery_type > NFS_LOCK_NEW);
1174dd1f
TM		 7301 msg.rpc_argp = &data->arg;
7302 msg.rpc_resp = &data->res;
c970aa85 7303 task_setup_data.callback_data = data;
8fe72bac
TM		 7304 if (recovery_type > NFS_LOCK_NEW) {
7305 if (recovery_type == NFS_LOCK_RECLAIM)
7306 data->arg.reclaim = NFS_LOCK_RECLAIM;
c69899a1
TM		 7307 } else
7308 data->arg.new_lock = 1;
c970aa85 7309 task = rpc_run_task(&task_setup_data);
7a1218a2 7310 if (IS_ERR(task))
a5d16a4d 7311 return PTR_ERR(task);
820bf85c 7312 ret = rpc_wait_for_completion_task(task);
a5d16a4d
TM		 7313 if (ret == 0) {
7314 ret = data->rpc_status;
2bee72a6
TM		 7315 if (ret)
7316 nfs4_handle_setlk_error(data->server, data->lsp,
7317 data->arg.new_lock_owner, ret);
a5d16a4d 7318 } else
a7a3b1e9 7319 data->cancelled = true;
3d1a90ab 7320 trace_nfs4_set_lock(fl, state, &data->res.stateid, cmd, ret);
e6b3c4db 7321 rpc_put_task(task);
86882c75 7322 dprintk("%s: ret = %d\n", __func__, ret);
a5d16a4d 7323 return ret;
1da177e4
LT		 7324}
7325
7326static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
7327{
202b50dc 7328 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 7329 struct nfs4_exception exception = {
7330 .inode = state->inode,
7331 };
202b50dc
TM		 7332 int err;
7333
7334 do {
42a2d13e
TM		 7335 /* Cache the lock if possible... */
7336 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
7337 return 0;
afe6c27c 7338 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 7339 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 7340 break;
7341 nfs4_handle_exception(server, err, &exception);
7342 } while (exception.retry);
7343 return err;
1da177e4
LT		 7344}
7345
7346static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
7347{
202b50dc 7348 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 7349 struct nfs4_exception exception = {
7350 .inode = state->inode,
7351 };
202b50dc
TM		 7352 int err;
7353
6bfc93ef
TM		 7354 err = nfs4_set_lock_state(state, request);
7355 if (err != 0)
7356 return err;
f6de7a39 7357 if (!recover_lost_locks) {
ef1820f9
N		 7358 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
7359 return 0;
7360 }
202b50dc 7361 do {
42a2d13e
TM		 7362 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
7363 return 0;
afe6c27c 7364 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 7365 switch (err) {
7366 default:
7367 goto out;
7368 case -NFS4ERR_GRACE:
7369 case -NFS4ERR_DELAY:
7370 nfs4_handle_exception(server, err, &exception);
7371 err = 0;
7372 }
202b50dc 7373 } while (exception.retry);
a9ed2e25 7374out:
202b50dc 7375 return err;
1da177e4
LT		 7376}
7377
f062eb6c 7378#if defined(CONFIG_NFS_V4_1)
b01dd1d8
BS		 7379static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
7380{
c5896fc8
TM		 7381 struct nfs4_lock_state *lsp;
7382 int status;
b01dd1d8 7383
c5896fc8
TM		 7384 status = nfs4_set_lock_state(state, request);
7385 if (status != 0)
7386 return status;
7387 lsp = request->fl_u.nfs4_fl.owner;
7388 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) ||
7389 test_bit(NFS_LOCK_LOST, &lsp->ls_flags))
7390 return 0;
81b68de4 7391 return nfs4_lock_expired(state, request);
f062eb6c
BS		 7392}
7393#endif
7394
1da177e4
LT		 7395static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
7396{
19e03c57 7397 struct nfs_inode *nfsi = NFS_I(state->inode);
11476e9d 7398 struct nfs4_state_owner *sp = state->owner;
dd1fac6a 7399 unsigned char flags = request->c.flc_flags;
1ea67dbd 7400 int status;
1da177e4 7401
dd1fac6a 7402 request->c.flc_flags |= FL_ACCESS;
75575ddf 7403 status = locks_lock_inode_wait(state->inode, request);
01c3b861
TM		 7404 if (status < 0)
7405 goto out;
11476e9d 7406 mutex_lock(&sp->so_delegreturn_mutex);
19e03c57 7407 down_read(&nfsi->rwsem);
01c3b861 7408 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 7409 /* Yes: cache locks! */
01c3b861 7410 /* ...but avoid races with delegation recall... */
dd1fac6a 7411 request->c.flc_flags = flags & ~FL_SLEEP;
75575ddf 7412 status = locks_lock_inode_wait(state->inode, request);
c69899a1 7413 up_read(&nfsi->rwsem);
11476e9d 7414 mutex_unlock(&sp->so_delegreturn_mutex);
9a99af49 7415 goto out;
9a99af49 7416 }
19e03c57 7417 up_read(&nfsi->rwsem);
11476e9d 7418 mutex_unlock(&sp->so_delegreturn_mutex);
c69899a1 7419 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
01c3b861 7420out:
dd1fac6a 7421 request->c.flc_flags = flags;
1da177e4
LT		 7422 return status;
7423}
7424
7425static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
7426{
a1d0b5ee
TM		 7427 struct nfs4_exception exception = {
7428 .state = state,
05ffe24f 7429 .inode = state->inode,
0688e64b 7430 .interruptible = true,
a1d0b5ee 7431 };
1da177e4
LT		 7432 int err;
7433
7434 do {
965b5d67
TM		 7435 err = _nfs4_proc_setlk(state, cmd, request);
7436 if (err == -NFS4ERR_DENIED)
7437 err = -EAGAIN;
1da177e4 7438 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 7439 err, &exception);
1da177e4
LT		 7440 } while (exception.retry);
7441 return err;
7442}
7443
d2f3a7f9
JL		 7444#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
7445#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
7446
7447static int
a1d617d8
JL		 7448nfs4_retry_setlk_simple(struct nfs4_state *state, int cmd,
7449 struct file_lock *request)
d2f3a7f9
JL		 7450{
7451 int status = -ERESTARTSYS;
7452 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
7453
7454 while(!signalled()) {
7455 status = nfs4_proc_setlk(state, cmd, request);
7456 if ((status != -EAGAIN) || IS_SETLK(cmd))
7457 break;
f5d39b02
PZ		 7458 __set_current_state(TASK_INTERRUPTIBLE|TASK_FREEZABLE);
7459 schedule_timeout(timeout);
d2f3a7f9
JL		 7460 timeout *= 2;
7461 timeout = min_t(unsigned long, NFS4_LOCK_MAXTIMEOUT, timeout);
7462 status = -ERESTARTSYS;
7463 }
7464 return status;
7465}
7466
a1d617d8
JL		 7467#ifdef CONFIG_NFS_V4_1
7468struct nfs4_lock_waiter {
a1d617d8 7469 struct inode *inode;
86438186
TM		 7470 struct nfs_lowner owner;
7471 wait_queue_entry_t wait;
a1d617d8
JL		 7472};
7473
7474static int
ac6424b9 7475nfs4_wake_lock_waiter(wait_queue_entry_t *wait, unsigned int mode, int flags, void *key)
a1d617d8 7476{
86438186
TM		 7477 struct nfs4_lock_waiter *waiter =
7478 container_of(wait, struct nfs4_lock_waiter, wait);
a1d617d8 7479
57174593
JL		 7480 /* NULL key means to wake up everyone */
7481 if (key) {
7482 struct cb_notify_lock_args *cbnl = key;
7483 struct nfs_lowner *lowner = &cbnl->cbnl_owner,
86438186 7484 *wowner = &waiter->owner;
a1d617d8 7485
57174593
JL		 7486 /* Only wake if the callback was for the same owner. */
7487 if (lowner->id != wowner->id || lowner->s_dev != wowner->s_dev)
7488 return 0;
a1d617d8 7489
57174593
JL		 7490 /* Make sure it's for the right inode */
7491 if (nfs_compare_fh(NFS_FH(waiter->inode), &cbnl->cbnl_fh))
7492 return 0;
57174593 7493 }
a1d617d8 7494
86438186 7495 return woken_wake_function(wait, mode, flags, key);
a1d617d8
JL		 7496}
7497
7498static int
7499nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
7500{
a1d617d8
JL		 7501 struct nfs4_lock_state *lsp = request->fl_u.nfs4_fl.owner;
7502 struct nfs_server *server = NFS_SERVER(state->inode);
7503 struct nfs_client *clp = server->nfs_client;
7504 wait_queue_head_t *q = &clp->cl_lock_waitq;
86438186
TM		 7505 struct nfs4_lock_waiter waiter = {
7506 .inode = state->inode,
7507 .owner = { .clientid = clp->cl_clientid,
7508 .id = lsp->ls_seqid.owner_id,
7509 .s_dev = server->s_dev },
7510 };
7511 int status;
a1d617d8
JL		 7512
7513 /* Don't bother with waitqueue if we don't expect a callback */
7514 if (!test_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags))
7515 return nfs4_retry_setlk_simple(state, cmd, request);
7516
86438186
TM		 7517 init_wait(&waiter.wait);
7518 waiter.wait.func = nfs4_wake_lock_waiter;
7519 add_wait_queue(q, &waiter.wait);
a1d617d8 7520
86438186 7521 do {
a1d617d8 7522 status = nfs4_proc_setlk(state, cmd, request);
86438186 7523 if (status != -EAGAIN || IS_SETLK(cmd))
a1d617d8
JL		 7524 break;
7525
7526 status = -ERESTARTSYS;
f5d39b02 7527 wait_woken(&waiter.wait, TASK_INTERRUPTIBLE|TASK_FREEZABLE,
86438186 7528 NFS4_LOCK_MAXTIMEOUT);
86438186
TM		 7529 } while (!signalled());
7530
7531 remove_wait_queue(q, &waiter.wait);
a1d617d8 7532
a1d617d8
JL		 7533 return status;
7534}
7535#else /* !CONFIG_NFS_V4_1 */
7536static inline int
7537nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
7538{
7539 return nfs4_retry_setlk_simple(state, cmd, request);
7540}
7541#endif
7542
1da177e4
LT		 7543static int
7544nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
7545{
7546 struct nfs_open_context *ctx;
7547 struct nfs4_state *state;
1da177e4
LT		 7548 int status;
7549
7550 /* verify open state */
cd3758e3 7551 ctx = nfs_file_open_context(filp);
1da177e4
LT		 7552 state = ctx->state;
7553
d953126a
TM		 7554 if (IS_GETLK(cmd)) {
7555 if (state != NULL)
7556 return nfs4_proc_getlk(state, F_GETLK, request);
7557 return 0;
7558 }
1da177e4
LT		 7559
7560 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
7561 return -EINVAL;
7562
d7c9616b 7563 if (lock_is_unlock(request)) {
d953126a
TM		 7564 if (state != NULL)
7565 return nfs4_proc_unlck(state, cmd, request);
7566 return 0;
7567 }
1da177e4 7568
d953126a
TM		 7569 if (state == NULL)
7570 return -ENOLCK;
1ea67dbd 7571
dd1fac6a 7572 if ((request->c.flc_flags & FL_POSIX) &&
1ea67dbd
JL		 7573 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
7574 return -ENOLCK;
7575
fcfa4470
BC		 7576 /*
7577 * Don't rely on the VFS having checked the file open mode,
7578 * since it won't do this for flock() locks.
7579 */
dd1fac6a 7580 switch (request->c.flc_type) {
fcfa4470
BC		 7581 case F_RDLCK:
7582 if (!(filp->f_mode & FMODE_READ))
7583 return -EBADF;
7584 break;
7585 case F_WRLCK:
7586 if (!(filp->f_mode & FMODE_WRITE))
7587 return -EBADF;
7588 }
7589
1ea67dbd
JL		 7590 status = nfs4_set_lock_state(state, request);
7591 if (status != 0)
7592 return status;
7593
d2f3a7f9 7594 return nfs4_retry_setlk(state, cmd, request);
1da177e4
LT		 7595}
7596
e93a5e93
TM		 7597static int nfs4_delete_lease(struct file *file, void **priv)
7598{
7599 return generic_setlease(file, F_UNLCK, NULL, priv);
7600}
7601
c69ff407 7602static int nfs4_add_lease(struct file *file, int arg, struct file_lease **lease,
e93a5e93
TM		 7603 void **priv)
7604{
7605 struct inode *inode = file_inode(file);
7606 fmode_t type = arg == F_RDLCK ? FMODE_READ : FMODE_WRITE;
7607 int ret;
7608
7609 /* No delegation, no lease */
7610 if (!nfs4_have_delegation(inode, type))
df2c7b95 7611 return -EAGAIN;
e93a5e93
TM		 7612 ret = generic_setlease(file, arg, lease, priv);
7613 if (ret || nfs4_have_delegation(inode, type))
7614 return ret;
7615 /* We raced with a delegation return */
7616 nfs4_delete_lease(file, priv);
df2c7b95 7617 return -EAGAIN;
e93a5e93
TM		 7618}
7619
c69ff407 7620int nfs4_proc_setlease(struct file *file, int arg, struct file_lease **lease,
e93a5e93
TM		 7621 void **priv)
7622{
7623 switch (arg) {
7624 case F_RDLCK:
7625 case F_WRLCK:
7626 return nfs4_add_lease(file, arg, lease, priv);
7627 case F_UNLCK:
7628 return nfs4_delete_lease(file, priv);
7629 default:
7630 return -EINVAL;
7631 }
7632}
7633
db4f2e63 7634int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 7635{
7636 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 7637 int err;
7638
7639 err = nfs4_set_lock_state(state, fl);
7640 if (err != 0)
db4f2e63 7641 return err;
3d7a9520
OK		 7642 do {
7643 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
7644 if (err != -NFS4ERR_DELAY)
7645 break;
7646 ssleep(1);
7647 } while (err == -NFS4ERR_DELAY);
dce2630c 7648 return nfs4_handle_delegation_recall_error(server, state, stateid, fl, err);
888e694c 7649}
6b3b5496 7650
cf470c3e
TM		 7651struct nfs_release_lockowner_data {
7652 struct nfs4_lock_state *lsp;
5ae67c4f 7653 struct nfs_server *server;
cf470c3e 7654 struct nfs_release_lockowner_args args;
b7e63a10 7655 struct nfs_release_lockowner_res res;
60ea6812 7656 unsigned long timestamp;
cf470c3e
TM		 7657};
7658
fbd4bfd1
CL		 7659static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
7660{
7661 struct nfs_release_lockowner_data *data = calldata;
5b53dc88 7662 struct nfs_server *server = data->server;
7981c8a6
AS		 7663 nfs4_setup_sequence(server->nfs_client, &data->args.seq_args,
7664 &data->res.seq_res, task);
5b53dc88 7665 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
60ea6812 7666 data->timestamp = jiffies;
fbd4bfd1
CL		 7667}
7668
7669static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
7670{
7671 struct nfs_release_lockowner_data *data = calldata;
60ea6812
CL		 7672 struct nfs_server *server = data->server;
7673
b7e63a10 7674 nfs40_sequence_done(task, &data->res.seq_res);
60ea6812
CL		 7675
7676 switch (task->tk_status) {
7677 case 0:
7678 renew_lease(server, data->timestamp);
7679 break;
7680 case -NFS4ERR_STALE_CLIENTID:
7681 case -NFS4ERR_EXPIRED:
5b53dc88
KM		 7682 nfs4_schedule_lease_recovery(server->nfs_client);
7683 break;
60ea6812
CL		 7684 case -NFS4ERR_LEASE_MOVED:
7685 case -NFS4ERR_DELAY:
8478eaa1
N		 7686 if (nfs4_async_handle_error(task, server,
7687 NULL, NULL) == -EAGAIN)
60ea6812
CL		 7688 rpc_restart_call_prepare(task);
7689 }
fbd4bfd1
CL		 7690}
7691
d3c7b7cc
TM		 7692static void nfs4_release_lockowner_release(void *calldata)
7693{
cf470c3e 7694 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 7695 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 7696 kfree(calldata);
7697}
7698
17280175 7699static const struct rpc_call_ops nfs4_release_lockowner_ops = {
fbd4bfd1
CL		 7700 .rpc_call_prepare = nfs4_release_lockowner_prepare,
7701 .rpc_call_done = nfs4_release_lockowner_done,
d3c7b7cc
TM		 7702 .rpc_release = nfs4_release_lockowner_release,
7703};
7704
f1cdae87
JL		 7705static void
7706nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 7707{
cf470c3e 7708 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 7709 struct rpc_message msg = {
7710 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
7711 };
7712
7713 if (server->nfs_client->cl_mvops->minor_version != 0)
f1cdae87 7714 return;
fbd4bfd1 7715
da48f267 7716 data = kmalloc(sizeof(*data), GFP_KERNEL);
cf470c3e 7717 if (!data)
f1cdae87 7718 return;
cf470c3e 7719 data->lsp = lsp;
5ae67c4f 7720 data->server = server;
cf470c3e
TM		 7721 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
7722 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
7723 data->args.lock_owner.s_dev = server->s_dev;
fbd4bfd1 7724
cf470c3e 7725 msg.rpc_argp = &data->args;
b7e63a10 7726 msg.rpc_resp = &data->res;
fba83f34 7727 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0, 0);
cf470c3e 7728 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
d3c7b7cc
TM		 7729}
7730
aa1870af
BF		 7731#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
7732
d9a82a04 7733static int nfs4_xattr_set_nfs4_acl(const struct xattr_handler *handler,
39f60c1c 7734 struct mnt_idmap *idmap,
59301226
AV		 7735 struct dentry *unused, struct inode *inode,
7736 const char *key, const void *buf,
7737 size_t buflen, int flags)
6b3b5496 7738{
7b8b44eb 7739 return nfs4_proc_set_acl(inode, buf, buflen, NFS4ACL_ACL);
6b3b5496
BF		 7740}
7741
d9a82a04 7742static int nfs4_xattr_get_nfs4_acl(const struct xattr_handler *handler,
b296821a
AV		 7743 struct dentry *unused, struct inode *inode,
7744 const char *key, void *buf, size_t buflen)
6b3b5496 7745{
7b8b44eb 7746 return nfs4_proc_get_acl(inode, buf, buflen, NFS4ACL_ACL);
6b3b5496
BF		 7747}
7748
764a5c6b 7749static bool nfs4_xattr_list_nfs4_acl(struct dentry *dentry)
6b3b5496 7750{
7b8b44eb 7751 return nfs4_server_supports_acls(NFS_SB(dentry->d_sb), NFS4ACL_ACL);
6b3b5496
BF		 7752}
7753
71342db0
TM		 7754#if defined(CONFIG_NFS_V4_1)
7755#define XATTR_NAME_NFSV4_DACL "system.nfs4_dacl"
7756
7757static int nfs4_xattr_set_nfs4_dacl(const struct xattr_handler *handler,
39f60c1c 7758 struct mnt_idmap *idmap,
71342db0
TM		 7759 struct dentry *unused, struct inode *inode,
7760 const char *key, const void *buf,
7761 size_t buflen, int flags)
7762{
7763 return nfs4_proc_set_acl(inode, buf, buflen, NFS4ACL_DACL);
7764}
7765
7766static int nfs4_xattr_get_nfs4_dacl(const struct xattr_handler *handler,
7767 struct dentry *unused, struct inode *inode,
7768 const char *key, void *buf, size_t buflen)
7769{
7770 return nfs4_proc_get_acl(inode, buf, buflen, NFS4ACL_DACL);
7771}
7772
7773static bool nfs4_xattr_list_nfs4_dacl(struct dentry *dentry)
7774{
7775 return nfs4_server_supports_acls(NFS_SB(dentry->d_sb), NFS4ACL_DACL);
7776}
7777
7778#define XATTR_NAME_NFSV4_SACL "system.nfs4_sacl"
7779
7780static int nfs4_xattr_set_nfs4_sacl(const struct xattr_handler *handler,
39f60c1c 7781 struct mnt_idmap *idmap,
71342db0
TM		 7782 struct dentry *unused, struct inode *inode,
7783 const char *key, const void *buf,
7784 size_t buflen, int flags)
7785{
7786 return nfs4_proc_set_acl(inode, buf, buflen, NFS4ACL_SACL);
7787}
7788
7789static int nfs4_xattr_get_nfs4_sacl(const struct xattr_handler *handler,
7790 struct dentry *unused, struct inode *inode,
7791 const char *key, void *buf, size_t buflen)
7792{
7793 return nfs4_proc_get_acl(inode, buf, buflen, NFS4ACL_SACL);
7794}
7795
7796static bool nfs4_xattr_list_nfs4_sacl(struct dentry *dentry)
7797{
7798 return nfs4_server_supports_acls(NFS_SB(dentry->d_sb), NFS4ACL_SACL);
7799}
7800
7801#endif
7802
c9bccef6 7803#ifdef CONFIG_NFS_V4_SECURITY_LABEL
c9bccef6 7804
d9a82a04 7805static int nfs4_xattr_set_nfs4_label(const struct xattr_handler *handler,
39f60c1c 7806 struct mnt_idmap *idmap,
59301226
AV		 7807 struct dentry *unused, struct inode *inode,
7808 const char *key, const void *buf,
7809 size_t buflen, int flags)
c9bccef6
DQ		 7810{
7811 if (security_ismaclabel(key))
59301226 7812 return nfs4_set_security_label(inode, buf, buflen);
c9bccef6
DQ		 7813
7814 return -EOPNOTSUPP;
7815}
7816
d9a82a04 7817static int nfs4_xattr_get_nfs4_label(const struct xattr_handler *handler,
b296821a
AV		 7818 struct dentry *unused, struct inode *inode,
7819 const char *key, void *buf, size_t buflen)
c9bccef6
DQ		 7820{
7821 if (security_ismaclabel(key))
b296821a 7822 return nfs4_get_security_label(inode, buf, buflen);
c9bccef6
DQ		 7823 return -EOPNOTSUPP;
7824}
7825
c4803c49
AG		 7826static ssize_t
7827nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
c9bccef6 7828{
c4803c49 7829 int len = 0;
c9bccef6 7830
c4803c49
AG		 7831 if (nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) {
7832 len = security_inode_listsecurity(inode, list, list_len);
82c596eb 7833 if (len >= 0 && list_len && len > list_len)
c4803c49 7834 return -ERANGE;
c9bccef6
DQ		 7835 }
7836 return len;
7837}
7838
7839static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
7840 .prefix = XATTR_SECURITY_PREFIX,
c9bccef6
DQ		 7841 .get = nfs4_xattr_get_nfs4_label,
7842 .set = nfs4_xattr_set_nfs4_label,
7843};
c9bccef6 7844
c4803c49
AG		 7845#else
7846
7847static ssize_t
7848nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
7849{
7850 return 0;
7851}
7852
7853#endif
c9bccef6 7854
012a211a
FL		 7855#ifdef CONFIG_NFS_V4_2
7856static int nfs4_xattr_set_nfs4_user(const struct xattr_handler *handler,
39f60c1c 7857 struct mnt_idmap *idmap,
012a211a
FL		 7858 struct dentry *unused, struct inode *inode,
7859 const char *key, const void *buf,
7860 size_t buflen, int flags)
7861{
b5e7b59c 7862 u32 mask;
95ad37f9 7863 int ret;
012a211a
FL		 7864
7865 if (!nfs_server_capable(inode, NFS_CAP_XATTR))
7866 return -EOPNOTSUPP;
7867
7868 /*
7869 * There is no mapping from the MAY_* flags to the NFS_ACCESS_XA*
7870 * flags right now. Handling of xattr operations use the normal
7871 * file read/write permissions.
7872 *
7873 * Just in case the server has other ideas (which RFC 8276 allows),
7874 * do a cached access check for the XA* flags to possibly avoid
7875 * doing an RPC and getting EACCES back.
7876 */
b5e7b59c
N		 7877 if (!nfs_access_get_cached(inode, current_cred(), &mask, true)) {
7878 if (!(mask & NFS_ACCESS_XAWRITE))
012a211a
FL		 7879 return -EACCES;
7880 }
7881
95ad37f9
FL		 7882 if (buf == NULL) {
7883 ret = nfs42_proc_removexattr(inode, key);
7884 if (!ret)
7885 nfs4_xattr_cache_remove(inode, key);
7886 } else {
7887 ret = nfs42_proc_setxattr(inode, key, buf, buflen, flags);
7888 if (!ret)
7889 nfs4_xattr_cache_add(inode, key, buf, NULL, buflen);
7890 }
7891
7892 return ret;
012a211a
FL		 7893}
7894
7895static int nfs4_xattr_get_nfs4_user(const struct xattr_handler *handler,
7896 struct dentry *unused, struct inode *inode,
7897 const char *key, void *buf, size_t buflen)
7898{
b5e7b59c 7899 u32 mask;
95ad37f9 7900 ssize_t ret;
012a211a
FL		 7901
7902 if (!nfs_server_capable(inode, NFS_CAP_XATTR))
7903 return -EOPNOTSUPP;
7904
b5e7b59c
N		 7905 if (!nfs_access_get_cached(inode, current_cred(), &mask, true)) {
7906 if (!(mask & NFS_ACCESS_XAREAD))
012a211a
FL		 7907 return -EACCES;
7908 }
7909
1f3208b2 7910 ret = nfs_revalidate_inode(inode, NFS_INO_INVALID_CHANGE);
95ad37f9
FL		 7911 if (ret)
7912 return ret;
7913
7914 ret = nfs4_xattr_cache_get(inode, key, buf, buflen);
7915 if (ret >= 0 || (ret < 0 && ret != -ENOENT))
7916 return ret;
7917
7918 ret = nfs42_proc_getxattr(inode, key, buf, buflen);
7919
7920 return ret;
012a211a
FL		 7921}
7922
7923static ssize_t
7924nfs4_listxattr_nfs4_user(struct inode *inode, char *list, size_t list_len)
7925{
7926 u64 cookie;
7927 bool eof;
95ad37f9 7928 ssize_t ret, size;
012a211a
FL		 7929 char *buf;
7930 size_t buflen;
b5e7b59c 7931 u32 mask;
012a211a
FL		 7932
7933 if (!nfs_server_capable(inode, NFS_CAP_XATTR))
7934 return 0;
7935
b5e7b59c
N		 7936 if (!nfs_access_get_cached(inode, current_cred(), &mask, true)) {
7937 if (!(mask & NFS_ACCESS_XALIST))
012a211a
FL		 7938 return 0;
7939 }
7940
1f3208b2 7941 ret = nfs_revalidate_inode(inode, NFS_INO_INVALID_CHANGE);
95ad37f9
FL		 7942 if (ret)
7943 return ret;
7944
7945 ret = nfs4_xattr_cache_list(inode, list, list_len);
7946 if (ret >= 0 || (ret < 0 && ret != -ENOENT))
7947 return ret;
7948
012a211a
FL		 7949 cookie = 0;
7950 eof = false;
7951 buflen = list_len ? list_len : XATTR_LIST_MAX;
7952 buf = list_len ? list : NULL;
7953 size = 0;
7954
7955 while (!eof) {
7956 ret = nfs42_proc_listxattrs(inode, buf, buflen,
7957 &cookie, &eof);
7958 if (ret < 0)
7959 return ret;
7960
7961 if (list_len) {
7962 buf += ret;
7963 buflen -= ret;
7964 }
7965 size += ret;
7966 }
7967
95ad37f9
FL		 7968 if (list_len)
7969 nfs4_xattr_cache_set_list(inode, list, size);
7970
012a211a
FL		 7971 return size;
7972}
7973
7974#else
7975
7976static ssize_t
7977nfs4_listxattr_nfs4_user(struct inode *inode, char *list, size_t list_len)
7978{
7979 return 0;
7980}
7981#endif /* CONFIG_NFS_V4_2 */
7982
533eb461
AA		 7983/*
7984 * nfs_fhget will use either the mounted_on_fileid or the fileid
7985 */
69aaaae1
TM		 7986static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
7987{
533eb461
AA		 7988 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
7989 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
7990 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 7991 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 7992 return;
7993
7994 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 7995 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 7996 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
7997 fattr->nlink = 2;
7998}
7999
f05d147f
BS		 8000static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
8001 const struct qstr *name,
8002 struct nfs4_fs_locations *fs_locations,
8003 struct page *page)
683b57b4
TM		 8004{
8005 struct nfs_server *server = NFS_SERVER(dir);
c05cefcc 8006 u32 bitmask[3];
683b57b4
TM		 8007 struct nfs4_fs_locations_arg args = {
8008 .dir_fh = NFS_FH(dir),
c228fd3a 8009 .name = name,
683b57b4
TM		 8010 .page = page,
8011 .bitmask = bitmask,
8012 };
22958463
BH		 8013 struct nfs4_fs_locations_res res = {
8014 .fs_locations = fs_locations,
8015 };
683b57b4
TM		 8016 struct rpc_message msg = {
8017 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
8018 .rpc_argp = &args,
22958463 8019 .rpc_resp = &res,
683b57b4
TM		 8020 };
8021 int status;
8022
3110ff80 8023 dprintk("%s: start\n", __func__);
533eb461 8024
c05cefcc
CL		 8025 bitmask[0] = nfs4_fattr_bitmap[0] | FATTR4_WORD0_FS_LOCATIONS;
8026 bitmask[1] = nfs4_fattr_bitmap[1];
8027
533eb461
AA		 8028 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
8029 * is not supported */
8030 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
c05cefcc 8031 bitmask[0] &= ~FATTR4_WORD0_FILEID;
533eb461 8032 else
c05cefcc 8033 bitmask[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
533eb461 8034
c3ed2227 8035 nfs_fattr_init(fs_locations->fattr);
683b57b4 8036 fs_locations->server = server;
830b8e33 8037 fs_locations->nlocations = 0;
f05d147f 8038 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 8039 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 8040 return status;
8041}
8042
f05d147f
BS		 8043int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
8044 const struct qstr *name,
8045 struct nfs4_fs_locations *fs_locations,
8046 struct page *page)
db0a9593 8047{
0688e64b
TM		 8048 struct nfs4_exception exception = {
8049 .interruptible = true,
8050 };
db0a9593
BS		 8051 int err;
8052 do {
078ea3df
TM		 8053 err = _nfs4_proc_fs_locations(client, dir, name,
8054 fs_locations, page);
8055 trace_nfs4_get_fs_locations(dir, name, err);
8056 err = nfs4_handle_exception(NFS_SERVER(dir), err,
db0a9593
BS		 8057 &exception);
8058 } while (exception.retry);
8059 return err;
8060}
8061
b03d735b
CL		 8062/*
8063 * This operation also signals the server that this client is
8064 * performing migration recovery. The server can stop returning
8065 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
8066 * appended to this compound to identify the client ID which is
8067 * performing recovery.
8068 */
1976b2b3
OK		 8069static int _nfs40_proc_get_locations(struct nfs_server *server,
8070 struct nfs_fh *fhandle,
b03d735b 8071 struct nfs4_fs_locations *locations,
a52458b4 8072 struct page *page, const struct cred *cred)
b03d735b 8073{
b03d735b
CL		 8074 struct rpc_clnt *clnt = server->client;
8075 u32 bitmask[2] = {
8076 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
8077 };
8078 struct nfs4_fs_locations_arg args = {
8079 .clientid = server->nfs_client->cl_clientid,
1976b2b3 8080 .fh = fhandle,
b03d735b
CL		 8081 .page = page,
8082 .bitmask = bitmask,
8083 .migration = 1, /* skip LOOKUP */
8084 .renew = 1, /* append RENEW */
8085 };
8086 struct nfs4_fs_locations_res res = {
8087 .fs_locations = locations,
8088 .migration = 1,
8089 .renew = 1,
8090 };
8091 struct rpc_message msg = {
8092 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
8093 .rpc_argp = &args,
8094 .rpc_resp = &res,
8095 .rpc_cred = cred,
8096 };
8097 unsigned long now = jiffies;
8098 int status;
8099
c3ed2227 8100 nfs_fattr_init(locations->fattr);
b03d735b
CL		 8101 locations->server = server;
8102 locations->nlocations = 0;
8103
fba83f34 8104 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1);
b03d735b
CL		 8105 status = nfs4_call_sync_sequence(clnt, server, &msg,
8106 &args.seq_args, &res.seq_res);
8107 if (status)
8108 return status;
8109
8110 renew_lease(server, now);
8111 return 0;
8112}
8113
8114#ifdef CONFIG_NFS_V4_1
8115
8116/*
8117 * This operation also signals the server that this client is
8118 * performing migration recovery. The server can stop asserting
8119 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
8120 * performing this operation is identified in the SEQUENCE
8121 * operation in this compound.
8122 *
8123 * When the client supports GETATTR(fs_locations_info), it can
8124 * be plumbed in here.
8125 */
1976b2b3
OK		 8126static int _nfs41_proc_get_locations(struct nfs_server *server,
8127 struct nfs_fh *fhandle,
b03d735b 8128 struct nfs4_fs_locations *locations,
a52458b4 8129 struct page *page, const struct cred *cred)
b03d735b 8130{
b03d735b
CL		 8131 struct rpc_clnt *clnt = server->client;
8132 u32 bitmask[2] = {
8133 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
8134 };
8135 struct nfs4_fs_locations_arg args = {
1976b2b3 8136 .fh = fhandle,
b03d735b
CL		 8137 .page = page,
8138 .bitmask = bitmask,
8139 .migration = 1, /* skip LOOKUP */
8140 };
8141 struct nfs4_fs_locations_res res = {
8142 .fs_locations = locations,
8143 .migration = 1,
8144 };
8145 struct rpc_message msg = {
8146 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
8147 .rpc_argp = &args,
8148 .rpc_resp = &res,
8149 .rpc_cred = cred,
8150 };
b4be2c59
OK		 8151 struct nfs4_call_sync_data data = {
8152 .seq_server = server,
8153 .seq_args = &args.seq_args,
8154 .seq_res = &res.seq_res,
8155 };
8156 struct rpc_task_setup task_setup_data = {
8157 .rpc_client = clnt,
8158 .rpc_message = &msg,
8159 .callback_ops = server->nfs_client->cl_mvops->call_sync_ops,
8160 .callback_data = &data,
8161 .flags = RPC_TASK_NO_ROUND_ROBIN,
8162 };
b03d735b
CL		 8163 int status;
8164
c3ed2227 8165 nfs_fattr_init(locations->fattr);
b03d735b
CL		 8166 locations->server = server;
8167 locations->nlocations = 0;
8168
fba83f34 8169 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1);
b4be2c59 8170 status = nfs4_call_sync_custom(&task_setup_data);
b03d735b
CL		 8171 if (status == NFS4_OK &&
8172 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
8173 status = -NFS4ERR_LEASE_MOVED;
8174 return status;
8175}
8176
8177#endif /* CONFIG_NFS_V4_1 */
8178
8179/**
8180 * nfs4_proc_get_locations - discover locations for a migrated FSID
3d4a3940
YL		 8181 * @server: pointer to nfs_server to process
8182 * @fhandle: pointer to the kernel NFS client file handle
b03d735b
CL		 8183 * @locations: result of query
8184 * @page: buffer
8185 * @cred: credential to use for this operation
8186 *
8187 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
8188 * operation failed, or a negative errno if a local error occurred.
8189 *
8190 * On success, "locations" is filled in, but if the server has
8191 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
8192 * asserted.
8193 *
8194 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
8195 * from this client that require migration recovery.
8196 */
1976b2b3
OK		 8197int nfs4_proc_get_locations(struct nfs_server *server,
8198 struct nfs_fh *fhandle,
b03d735b 8199 struct nfs4_fs_locations *locations,
a52458b4 8200 struct page *page, const struct cred *cred)
b03d735b 8201{
b03d735b
CL		 8202 struct nfs_client *clp = server->nfs_client;
8203 const struct nfs4_mig_recovery_ops *ops =
8204 clp->cl_mvops->mig_recovery_ops;
0688e64b
TM		 8205 struct nfs4_exception exception = {
8206 .interruptible = true,
8207 };
b03d735b
CL		 8208 int status;
8209
8210 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
8211 (unsigned long long)server->fsid.major,
8212 (unsigned long long)server->fsid.minor,
8213 clp->cl_hostname);
1976b2b3 8214 nfs_display_fhandle(fhandle, __func__);
b03d735b
CL		 8215
8216 do {
1976b2b3
OK		 8217 status = ops->get_locations(server, fhandle, locations, page,
8218 cred);
b03d735b
CL		 8219 if (status != -NFS4ERR_DELAY)
8220 break;
8221 nfs4_handle_exception(server, status, &exception);
8222 } while (exception.retry);
8223 return status;
8224}
8225
44c99933
CL		 8226/*
8227 * This operation also signals the server that this client is
8228 * performing "lease moved" recovery. The server can stop
8229 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
8230 * is appended to this compound to identify the client ID which is
8231 * performing recovery.
8232 */
a52458b4 8233static int _nfs40_proc_fsid_present(struct inode *inode, const struct cred *cred)
44c99933
CL		 8234{
8235 struct nfs_server *server = NFS_SERVER(inode);
8236 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
8237 struct rpc_clnt *clnt = server->client;
8238 struct nfs4_fsid_present_arg args = {
8239 .fh = NFS_FH(inode),
8240 .clientid = clp->cl_clientid,
8241 .renew = 1, /* append RENEW */
8242 };
8243 struct nfs4_fsid_present_res res = {
8244 .renew = 1,
8245 };
8246 struct rpc_message msg = {
8247 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
8248 .rpc_argp = &args,
8249 .rpc_resp = &res,
8250 .rpc_cred = cred,
8251 };
8252 unsigned long now = jiffies;
8253 int status;
8254
8255 res.fh = nfs_alloc_fhandle();
8256 if (res.fh == NULL)
8257 return -ENOMEM;
8258
fba83f34 8259 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1);
44c99933
CL		 8260 status = nfs4_call_sync_sequence(clnt, server, &msg,
8261 &args.seq_args, &res.seq_res);
8262 nfs_free_fhandle(res.fh);
8263 if (status)
8264 return status;
8265
8266 do_renew_lease(clp, now);
8267 return 0;
8268}
8269
8270#ifdef CONFIG_NFS_V4_1
8271
8272/*
8273 * This operation also signals the server that this client is
8274 * performing "lease moved" recovery. The server can stop asserting
8275 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
8276 * this operation is identified in the SEQUENCE operation in this
8277 * compound.
8278 */
a52458b4 8279static int _nfs41_proc_fsid_present(struct inode *inode, const struct cred *cred)
44c99933
CL		 8280{
8281 struct nfs_server *server = NFS_SERVER(inode);
8282 struct rpc_clnt *clnt = server->client;
8283 struct nfs4_fsid_present_arg args = {
8284 .fh = NFS_FH(inode),
8285 };
8286 struct nfs4_fsid_present_res res = {
8287 };
8288 struct rpc_message msg = {
8289 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
8290 .rpc_argp = &args,
8291 .rpc_resp = &res,
8292 .rpc_cred = cred,
8293 };
8294 int status;
8295
8296 res.fh = nfs_alloc_fhandle();
8297 if (res.fh == NULL)
8298 return -ENOMEM;
8299
fba83f34 8300 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1);
44c99933
CL		 8301 status = nfs4_call_sync_sequence(clnt, server, &msg,
8302 &args.seq_args, &res.seq_res);
8303 nfs_free_fhandle(res.fh);
8304 if (status == NFS4_OK &&
8305 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
8306 status = -NFS4ERR_LEASE_MOVED;
8307 return status;
8308}
8309
8310#endif /* CONFIG_NFS_V4_1 */
8311
8312/**
8313 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
8314 * @inode: inode on FSID to check
8315 * @cred: credential to use for this operation
8316 *
8317 * Server indicates whether the FSID is present, moved, or not
8318 * recognized. This operation is necessary to clear a LEASE_MOVED
8319 * condition for this client ID.
8320 *
8321 * Returns NFS4_OK if the FSID is present on this server,
8322 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
8323 * NFS4ERR code if some error occurred on the server, or a
8324 * negative errno if a local failure occurred.
8325 */
a52458b4 8326int nfs4_proc_fsid_present(struct inode *inode, const struct cred *cred)
44c99933
CL		 8327{
8328 struct nfs_server *server = NFS_SERVER(inode);
8329 struct nfs_client *clp = server->nfs_client;
8330 const struct nfs4_mig_recovery_ops *ops =
8331 clp->cl_mvops->mig_recovery_ops;
0688e64b
TM		 8332 struct nfs4_exception exception = {
8333 .interruptible = true,
8334 };
44c99933
CL		 8335 int status;
8336
8337 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
8338 (unsigned long long)server->fsid.major,
8339 (unsigned long long)server->fsid.minor,
8340 clp->cl_hostname);
8341 nfs_display_fhandle(NFS_FH(inode), __func__);
8342
8343 do {
8344 status = ops->fsid_present(inode, cred);
8345 if (status != -NFS4ERR_DELAY)
8346 break;
8347 nfs4_handle_exception(server, status, &exception);
8348 } while (exception.retry);
8349 return status;
8350}
8351
302fad7b 8352/*
a5250def
WAA		 8353 * If 'use_integrity' is true and the state managment nfs_client
8354 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
8355 * and the machine credential as per RFC3530bis and RFC5661 Security
8356 * Considerations sections. Otherwise, just use the user cred with the
8357 * filesystem's rpc_client.
5ec16a85 8358 */
a5250def 8359static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
5a5ea0d4
BS		 8360{
8361 int status;
50493364
AS		 8362 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
8363 struct nfs_client *clp = NFS_SERVER(dir)->nfs_client;
5a5ea0d4
BS		 8364 struct nfs4_secinfo_arg args = {
8365 .dir_fh = NFS_FH(dir),
8366 .name = name,
8367 };
8368 struct nfs4_secinfo_res res = {
8369 .flavors = flavors,
8370 };
8371 struct rpc_message msg = {
8372 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
8373 .rpc_argp = &args,
8374 .rpc_resp = &res,
8375 };
50493364
AS		 8376 struct nfs4_call_sync_data data = {
8377 .seq_server = NFS_SERVER(dir),
8378 .seq_args = &args.seq_args,
8379 .seq_res = &res.seq_res,
8380 };
8381 struct rpc_task_setup task_setup = {
8382 .rpc_client = clnt,
8383 .rpc_message = &msg,
8384 .callback_ops = clp->cl_mvops->call_sync_ops,
8385 .callback_data = &data,
8386 .flags = RPC_TASK_NO_ROUND_ROBIN,
8387 };
a52458b4 8388 const struct cred *cred = NULL;
a5250def
WAA		 8389
8390 if (use_integrity) {
50493364
AS		 8391 clnt = clp->cl_rpcclient;
8392 task_setup.rpc_client = clnt;
8393
8394 cred = nfs4_get_clid_cred(clp);
7cb852df 8395 msg.rpc_cred = cred;
a5250def 8396 }
5a5ea0d4
BS		 8397
8398 dprintk("NFS call secinfo %s\n", name->name);
8b5bee2e 8399
50493364
AS		 8400 nfs4_state_protect(clp, NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
8401 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0);
8402 status = nfs4_call_sync_custom(&task_setup);
8b5bee2e 8403
5a5ea0d4 8404 dprintk("NFS reply secinfo: %d\n", status);
a5250def 8405
a52458b4 8406 put_cred(cred);
5a5ea0d4
BS		 8407 return status;
8408}
8409
72de53ec
BS		 8410int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
8411 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4 8412{
0688e64b
TM		 8413 struct nfs4_exception exception = {
8414 .interruptible = true,
8415 };
5a5ea0d4
BS		 8416 int err;
8417 do {
a5250def
WAA		 8418 err = -NFS4ERR_WRONGSEC;
8419
8420 /* try to use integrity protection with machine cred */
8421 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
8422 err = _nfs4_proc_secinfo(dir, name, flavors, true);
8423
8424 /*
8425 * if unable to use integrity protection, or SECINFO with
8426 * integrity protection returns NFS4ERR_WRONGSEC (which is
8427 * disallowed by spec, but exists in deployed servers) use
8428 * the current filesystem's rpc_client and the user cred.
8429 */
8430 if (err == -NFS4ERR_WRONGSEC)
8431 err = _nfs4_proc_secinfo(dir, name, flavors, false);
8432
078ea3df
TM		 8433 trace_nfs4_secinfo(dir, name, err);
8434 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5a5ea0d4
BS		 8435 &exception);
8436 } while (exception.retry);
8437 return err;
8438}
8439
557134a3 8440#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 8441/*
8442 * Check the exchange flags returned by the server for invalid flags, having
8443 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
8444 * DS flags set.
8445 */
8c39076c 8446static int nfs4_check_cl_exchange_flags(u32 flags, u32 version)
357f54d6 8447{
8c39076c
OK		 8448 if (version >= 2 && (flags & ~EXCHGID4_2_FLAG_MASK_R))
8449 goto out_inval;
8450 else if (version < 2 && (flags & ~EXCHGID4_FLAG_MASK_R))
357f54d6
AA		 8451 goto out_inval;
8452 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
8453 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
8454 goto out_inval;
8455 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
8456 goto out_inval;
8457 return NFS_OK;
8458out_inval:
8459 return -NFS4ERR_INVAL;
8460}
8461
78fe0f41 8462static bool
79d4e1f0
CL		 8463nfs41_same_server_scope(struct nfs41_server_scope *a,
8464 struct nfs41_server_scope *b)
78fe0f41 8465{
49ad0145
AS		 8466 if (a->server_scope_sz != b->server_scope_sz)
8467 return false;
8468 return memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0;
78fe0f41
WAA		 8469}
8470
02a95dee
AA		 8471static void
8472nfs4_bind_one_conn_to_session_done(struct rpc_task *task, void *calldata)
8473{
5c441544 8474 struct nfs41_bind_conn_to_session_args *args = task->tk_msg.rpc_argp;
dff58530 8475 struct nfs41_bind_conn_to_session_res *res = task->tk_msg.rpc_resp;
5c441544
TM		 8476 struct nfs_client *clp = args->client;
8477
8478 switch (task->tk_status) {
8479 case -NFS4ERR_BADSESSION:
8480 case -NFS4ERR_DEADSESSION:
8481 nfs4_schedule_session_recovery(clp->cl_session,
8482 task->tk_status);
1d15d121 8483 return;
5c441544 8484 }
dff58530
OK		 8485 if (args->dir == NFS4_CDFC4_FORE_OR_BOTH &&
8486 res->dir != NFS4_CDFS4_BOTH) {
8487 rpc_task_close_connection(task);
8488 if (args->retries++ < MAX_BIND_CONN_TO_SESSION_RETRIES)
8489 rpc_restart_call(task);
8490 }
02a95dee
AA		 8491}
8492
8493static const struct rpc_call_ops nfs4_bind_one_conn_to_session_ops = {
1c709b76 8494 .rpc_call_done = nfs4_bind_one_conn_to_session_done,
02a95dee
AA		 8495};
8496
7c44f1ae 8497/*
d9ddbf5d 8498 * nfs4_proc_bind_one_conn_to_session()
7c44f1ae
WAA		 8499 *
8500 * The 4.1 client currently uses the same TCP connection for the
8501 * fore and backchannel.
8502 */
d9ddbf5d
TM		 8503static
8504int nfs4_proc_bind_one_conn_to_session(struct rpc_clnt *clnt,
8505 struct rpc_xprt *xprt,
8506 struct nfs_client *clp,
a52458b4 8507 const struct cred *cred)
7c44f1ae
WAA		 8508{
8509 int status;
71a097c6
TM		 8510 struct nfs41_bind_conn_to_session_args args = {
8511 .client = clp,
8512 .dir = NFS4_CDFC4_FORE_OR_BOTH,
dff58530 8513 .retries = 0,
71a097c6 8514 };
7c44f1ae
WAA		 8515 struct nfs41_bind_conn_to_session_res res;
8516 struct rpc_message msg = {
8517 .rpc_proc =
8518 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
71a097c6 8519 .rpc_argp = &args,
7c44f1ae 8520 .rpc_resp = &res,
2cf047c9 8521 .rpc_cred = cred,
7c44f1ae 8522 };
d9ddbf5d
TM		 8523 struct rpc_task_setup task_setup_data = {
8524 .rpc_client = clnt,
8525 .rpc_xprt = xprt,
02a95dee 8526 .callback_ops = &nfs4_bind_one_conn_to_session_ops,
d9ddbf5d
TM		 8527 .rpc_message = &msg,
8528 .flags = RPC_TASK_TIMEOUT,
8529 };
8530 struct rpc_task *task;
7c44f1ae 8531
71a097c6
TM		 8532 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id);
8533 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN))
8534 args.dir = NFS4_CDFC4_FORE;
7c44f1ae 8535
d9ddbf5d
TM		 8536 /* Do not set the backchannel flag unless this is clnt->cl_xprt */
8537 if (xprt != rcu_access_pointer(clnt->cl_xprt))
8538 args.dir = NFS4_CDFC4_FORE;
8539
8540 task = rpc_run_task(&task_setup_data);
8541 if (!IS_ERR(task)) {
8542 status = task->tk_status;
8543 rpc_put_task(task);
8544 } else
8545 status = PTR_ERR(task);
c6d01c6f 8546 trace_nfs4_bind_conn_to_session(clp, status);
7c44f1ae 8547 if (status == 0) {
71a097c6 8548 if (memcmp(res.sessionid.data,
7c44f1ae
WAA		 8549 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
8550 dprintk("NFS: %s: Session ID mismatch\n", __func__);
c7ae7639 8551 return -EIO;
7c44f1ae 8552 }
71a097c6 8553 if ((res.dir & args.dir) != res.dir || res.dir == 0) {
7c44f1ae
WAA		 8554 dprintk("NFS: %s: Unexpected direction from server\n",
8555 __func__);
c7ae7639 8556 return -EIO;
7c44f1ae 8557 }
71a097c6 8558 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) {
7c44f1ae
WAA		 8559 dprintk("NFS: %s: Server returned RDMA mode = true\n",
8560 __func__);
c7ae7639 8561 return -EIO;
7c44f1ae
WAA		 8562 }
8563 }
c7ae7639 8564
7c44f1ae
WAA		 8565 return status;
8566}
8567
d9ddbf5d
TM		 8568struct rpc_bind_conn_calldata {
8569 struct nfs_client *clp;
a52458b4 8570 const struct cred *cred;
d9ddbf5d
TM		 8571};
8572
8573static int
8574nfs4_proc_bind_conn_to_session_callback(struct rpc_clnt *clnt,
8575 struct rpc_xprt *xprt,
8576 void *calldata)
8577{
8578 struct rpc_bind_conn_calldata *p = calldata;
8579
8580 return nfs4_proc_bind_one_conn_to_session(clnt, xprt, p->clp, p->cred);
8581}
8582
a52458b4 8583int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, const struct cred *cred)
d9ddbf5d
TM		 8584{
8585 struct rpc_bind_conn_calldata data = {
8586 .clp = clp,
8587 .cred = cred,
8588 };
8589 return rpc_clnt_iterate_for_each_xprt(clp->cl_rpcclient,
8590 nfs4_proc_bind_conn_to_session_callback, &data);
8591}
8592
99fe60d0 8593/*
fa940720
WAA		 8594 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
8595 * and operations we'd like to see to enable certain features in the allow map
2031cd1a
WAA		 8596 */
8597static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
8598 .how = SP4_MACH_CRED,
8599 .enforce.u.words = {
8600 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
8601 1 << (OP_EXCHANGE_ID - 32) |
8602 1 << (OP_CREATE_SESSION - 32) |
8603 1 << (OP_DESTROY_SESSION - 32) |
8604 1 << (OP_DESTROY_CLIENTID - 32)
fa940720
WAA		 8605 },
8606 .allow.u.words = {
8607 [0] = 1 << (OP_CLOSE) |
99ade3c7 8608 1 << (OP_OPEN_DOWNGRADE) |
a0279625 8609 1 << (OP_LOCKU) |
99ade3c7 8610 1 << (OP_DELEGRETURN) |
a0279625 8611 1 << (OP_COMMIT),
8b5bee2e 8612 [1] = 1 << (OP_SECINFO - 32) |
3787d506 8613 1 << (OP_SECINFO_NO_NAME - 32) |
99ade3c7 8614 1 << (OP_LAYOUTRETURN - 32) |
3787d506 8615 1 << (OP_TEST_STATEID - 32) |
a0279625
WAA		 8616 1 << (OP_FREE_STATEID - 32) |
8617 1 << (OP_WRITE - 32)
2031cd1a
WAA		 8618 }
8619};
8620
8621/*
8622 * Select the state protection mode for client `clp' given the server results
8623 * from exchange_id in `sp'.
99fe60d0 8624 *
2031cd1a
WAA		 8625 * Returns 0 on success, negative errno otherwise.
8626 */
8627static int nfs4_sp4_select_mode(struct nfs_client *clp,
8628 struct nfs41_state_protection *sp)
8629{
8630 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
8631 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
8632 1 << (OP_EXCHANGE_ID - 32) |
8633 1 << (OP_CREATE_SESSION - 32) |
8634 1 << (OP_DESTROY_SESSION - 32) |
8635 1 << (OP_DESTROY_CLIENTID - 32)
8636 };
937e3133 8637 unsigned long flags = 0;
2031cd1a 8638 unsigned int i;
937e3133 8639 int ret = 0;
2031cd1a
WAA		 8640
8641 if (sp->how == SP4_MACH_CRED) {
8642 /* Print state protect result */
8643 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
8644 for (i = 0; i <= LAST_NFS4_OP; i++) {
8645 if (test_bit(i, sp->enforce.u.longs))
8646 dfprintk(MOUNT, " enforce op %d\n", i);
8647 if (test_bit(i, sp->allow.u.longs))
8648 dfprintk(MOUNT, " allow op %d\n", i);
8649 }
8650
8651 /* make sure nothing is on enforce list that isn't supported */
8652 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
8653 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
8654 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
937e3133
TM		 8655 ret = -EINVAL;
8656 goto out;
2031cd1a
WAA		 8657 }
8658 }
8659
8660 /*
8661 * Minimal mode - state operations are allowed to use machine
8662 * credential. Note this already happens by default, so the
8663 * client doesn't have to do anything more than the negotiation.
8664 *
8665 * NOTE: we don't care if EXCHANGE_ID is in the list -
8666 * we're already using the machine cred for exchange_id
8667 * and will never use a different cred.
8668 */
8669 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
8670 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
8671 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
8672 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
8673 dfprintk(MOUNT, "sp4_mach_cred:\n");
8674 dfprintk(MOUNT, " minimal mode enabled\n");
937e3133 8675 __set_bit(NFS_SP4_MACH_CRED_MINIMAL, &flags);
2031cd1a
WAA		 8676 } else {
8677 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
937e3133
TM		 8678 ret = -EINVAL;
8679 goto out;
2031cd1a 8680 }
fa940720
WAA		 8681
8682 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
99ade3c7
AE		 8683 test_bit(OP_OPEN_DOWNGRADE, sp->allow.u.longs) &&
8684 test_bit(OP_DELEGRETURN, sp->allow.u.longs) &&
fa940720
WAA		 8685 test_bit(OP_LOCKU, sp->allow.u.longs)) {
8686 dfprintk(MOUNT, " cleanup mode enabled\n");
937e3133 8687 __set_bit(NFS_SP4_MACH_CRED_CLEANUP, &flags);
fa940720 8688 }
8b5bee2e 8689
99ade3c7
AE		 8690 if (test_bit(OP_LAYOUTRETURN, sp->allow.u.longs)) {
8691 dfprintk(MOUNT, " pnfs cleanup mode enabled\n");
937e3133 8692 __set_bit(NFS_SP4_MACH_CRED_PNFS_CLEANUP, &flags);
99ade3c7
AE		 8693 }
8694
8b5bee2e
WAA		 8695 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
8696 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
8697 dfprintk(MOUNT, " secinfo mode enabled\n");
937e3133 8698 __set_bit(NFS_SP4_MACH_CRED_SECINFO, &flags);
8b5bee2e 8699 }
3787d506
WAA		 8700
8701 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
8702 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
8703 dfprintk(MOUNT, " stateid mode enabled\n");
937e3133 8704 __set_bit(NFS_SP4_MACH_CRED_STATEID, &flags);
3787d506 8705 }
8c21c62c
WAA		 8706
8707 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
8708 dfprintk(MOUNT, " write mode enabled\n");
937e3133 8709 __set_bit(NFS_SP4_MACH_CRED_WRITE, &flags);
8c21c62c
WAA		 8710 }
8711
8712 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
8713 dfprintk(MOUNT, " commit mode enabled\n");
937e3133 8714 __set_bit(NFS_SP4_MACH_CRED_COMMIT, &flags);
8c21c62c 8715 }
2031cd1a 8716 }
937e3133
TM		 8717out:
8718 clp->cl_sp4_flags = flags;
72bf75cf 8719 return ret;
2031cd1a
WAA		 8720}
8721
8d89bd70
AA		 8722struct nfs41_exchange_id_data {
8723 struct nfs41_exchange_id_res res;
8724 struct nfs41_exchange_id_args args;
8d89bd70
AA		 8725};
8726
8d89bd70
AA		 8727static void nfs4_exchange_id_release(void *data)
8728{
8729 struct nfs41_exchange_id_data *cdata =
8730 (struct nfs41_exchange_id_data *)data;
8731
63513232 8732 nfs_put_client(cdata->args.client);
8d89bd70
AA		 8733 kfree(cdata->res.impl_id);
8734 kfree(cdata->res.server_scope);
8735 kfree(cdata->res.server_owner);
8736 kfree(cdata);
8737}
8738
8739static const struct rpc_call_ops nfs4_exchange_id_call_ops = {
8d89bd70
AA		 8740 .rpc_release = nfs4_exchange_id_release,
8741};
8742
2031cd1a
WAA		 8743/*
8744 * _nfs4_proc_exchange_id()
6bbb4ae8 8745 *
2031cd1a 8746 * Wrapper for EXCHANGE_ID operation.
99fe60d0 8747 */
9c760d1f 8748static struct rpc_task *
a52458b4 8749nfs4_run_exchange_id(struct nfs_client *clp, const struct cred *cred,
ad0849a7 8750 u32 sp4_how, struct rpc_xprt *xprt)
99fe60d0 8751{
99fe60d0
BH		 8752 struct rpc_message msg = {
8753 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
99fe60d0
BH		 8754 .rpc_cred = cred,
8755 };
8d89bd70
AA		 8756 struct rpc_task_setup task_setup_data = {
8757 .rpc_client = clp->cl_rpcclient,
8758 .callback_ops = &nfs4_exchange_id_call_ops,
8759 .rpc_message = &msg,
5a0c257f 8760 .flags = RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN,
8d89bd70
AA		 8761 };
8762 struct nfs41_exchange_id_data *calldata;
e917f0d1 8763 int status;
8d89bd70 8764
212bf41d 8765 if (!refcount_inc_not_zero(&clp->cl_count))
9c760d1f 8766 return ERR_PTR(-EIO);
8d89bd70 8767
9c760d1f 8768 status = -ENOMEM;
8d89bd70 8769 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
9c760d1f
TM		 8770 if (!calldata)
8771 goto out;
99fe60d0 8772
fd40559c 8773 nfs4_init_boot_verifier(clp, &calldata->args.verifier);
873e3851
JL		 8774
8775 status = nfs4_init_uniform_client_string(clp);
8776 if (status)
8d89bd70 8777 goto out_calldata;
3a6bb738 8778
8d89bd70
AA		 8779 calldata->res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
8780 GFP_NOFS);
8781 status = -ENOMEM;
8782 if (unlikely(calldata->res.server_owner == NULL))
8783 goto out_calldata;
78fe0f41 8784
8d89bd70 8785 calldata->res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 8786 GFP_NOFS);
8d89bd70 8787 if (unlikely(calldata->res.server_scope == NULL))
acdeb69d 8788 goto out_server_owner;
78fe0f41 8789
8d89bd70
AA		 8790 calldata->res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
8791 if (unlikely(calldata->res.impl_id == NULL))
7d2ed9ac 8792 goto out_server_scope;
7d2ed9ac 8793
2031cd1a
WAA		 8794 switch (sp4_how) {
8795 case SP4_NONE:
8d89bd70 8796 calldata->args.state_protect.how = SP4_NONE;
2031cd1a
WAA		 8797 break;
8798
8799 case SP4_MACH_CRED:
8d89bd70 8800 calldata->args.state_protect = nfs4_sp4_mach_cred_request;
2031cd1a
WAA		 8801 break;
8802
8803 default:
8804 /* unsupported! */
8805 WARN_ON_ONCE(1);
8806 status = -EINVAL;
6b55970b 8807 goto out_impl_id;
2031cd1a 8808 }
ad0849a7 8809 if (xprt) {
ad0849a7 8810 task_setup_data.rpc_xprt = xprt;
d9cb7330 8811 task_setup_data.flags |= RPC_TASK_SOFTCONN;
fd40559c
TM		 8812 memcpy(calldata->args.verifier.data, clp->cl_confirm.data,
8813 sizeof(calldata->args.verifier.data));
ad0849a7 8814 }
8d89bd70 8815 calldata->args.client = clp;
8d89bd70 8816 calldata->args.flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
bfab2817
TM		 8817 EXCHGID4_FLAG_BIND_PRINC_STATEID;
8818#ifdef CONFIG_NFS_V4_1_MIGRATION
8819 calldata->args.flags |= EXCHGID4_FLAG_SUPP_MOVED_MIGR;
8d89bd70 8820#endif
51d674a5
OK		 8821 if (test_bit(NFS_CS_DS, &clp->cl_flags))
8822 calldata->args.flags |= EXCHGID4_FLAG_USE_PNFS_DS;
8d89bd70
AA		 8823 msg.rpc_argp = &calldata->args;
8824 msg.rpc_resp = &calldata->res;
8825 task_setup_data.callback_data = calldata;
2031cd1a 8826
9c760d1f 8827 return rpc_run_task(&task_setup_data);
8d89bd70
AA		 8828
8829out_impl_id:
8830 kfree(calldata->res.impl_id);
8831out_server_scope:
8832 kfree(calldata->res.server_scope);
8833out_server_owner:
8834 kfree(calldata->res.server_owner);
8835out_calldata:
8836 kfree(calldata);
9c760d1f 8837out:
63513232 8838 nfs_put_client(clp);
9c760d1f
TM		 8839 return ERR_PTR(status);
8840}
8841
8842/*
8843 * _nfs4_proc_exchange_id()
8844 *
8845 * Wrapper for EXCHANGE_ID operation.
8846 */
a52458b4 8847static int _nfs4_proc_exchange_id(struct nfs_client *clp, const struct cred *cred,
9c760d1f
TM		 8848 u32 sp4_how)
8849{
8850 struct rpc_task *task;
8851 struct nfs41_exchange_id_args *argp;
8852 struct nfs41_exchange_id_res *resp;
7dc2993a 8853 unsigned long now = jiffies;
9c760d1f
TM		 8854 int status;
8855
8856 task = nfs4_run_exchange_id(clp, cred, sp4_how, NULL);
8857 if (IS_ERR(task))
8858 return PTR_ERR(task);
8859
8860 argp = task->tk_msg.rpc_argp;
8861 resp = task->tk_msg.rpc_resp;
8862 status = task->tk_status;
8863 if (status != 0)
8864 goto out;
8865
8c39076c
OK		 8866 status = nfs4_check_cl_exchange_flags(resp->flags,
8867 clp->cl_mvops->minor_version);
9c760d1f
TM		 8868 if (status != 0)
8869 goto out;
8870
8871 status = nfs4_sp4_select_mode(clp, &resp->state_protect);
8872 if (status != 0)
8873 goto out;
8874
7dc2993a
RM		 8875 do_renew_lease(clp, now);
8876
9c760d1f
TM		 8877 clp->cl_clientid = resp->clientid;
8878 clp->cl_exchange_flags = resp->flags;
8879 clp->cl_seqid = resp->seqid;
8880 /* Client ID is not confirmed */
8881 if (!(resp->flags & EXCHGID4_FLAG_CONFIRMED_R))
8882 clear_bit(NFS4_SESSION_ESTABLISHED,
8883 &clp->cl_session->session_state);
8884
8885 if (clp->cl_serverscope != NULL &&
8886 !nfs41_same_server_scope(clp->cl_serverscope,
8887 resp->server_scope)) {
8888 dprintk("%s: server_scope mismatch detected\n",
8889 __func__);
8890 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
8891 }
8892
8893 swap(clp->cl_serverowner, resp->server_owner);
8894 swap(clp->cl_serverscope, resp->server_scope);
8895 swap(clp->cl_implid, resp->impl_id);
8896
8897 /* Save the EXCHANGE_ID verifier session trunk tests */
8898 memcpy(clp->cl_confirm.data, argp->verifier.data,
8899 sizeof(clp->cl_confirm.data));
8900out:
8901 trace_nfs4_exchange_id(clp, status);
8902 rpc_put_task(task);
8903 return status;
99fe60d0
BH		 8904}
8905
2031cd1a
WAA		 8906/*
8907 * nfs4_proc_exchange_id()
8908 *
8909 * Returns zero, a negative errno, or a negative NFS4ERR status code.
8910 *
8911 * Since the clientid has expired, all compounds using sessions
8912 * associated with the stale clientid will be returning
8913 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
8914 * be in some phase of session reset.
8915 *
8916 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
8917 */
a52458b4 8918int nfs4_proc_exchange_id(struct nfs_client *clp, const struct cred *cred)
2031cd1a
WAA		 8919{
8920 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
8921 int status;
8922
8923 /* try SP4_MACH_CRED if krb5i/p */
8924 if (authflavor == RPC_AUTH_GSS_KRB5I ||
8925 authflavor == RPC_AUTH_GSS_KRB5P) {
9c760d1f 8926 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
2031cd1a
WAA		 8927 if (!status)
8928 return 0;
8929 }
8930
8931 /* try SP4_NONE */
9c760d1f 8932 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
2031cd1a
WAA		 8933}
8934
04fa2c6b
AA		 8935/**
8936 * nfs4_test_session_trunk
8937 *
8938 * This is an add_xprt_test() test function called from
8939 * rpc_clnt_setup_test_and_add_xprt.
8940 *
8941 * The rpc_xprt_switch is referrenced by rpc_clnt_setup_test_and_add_xprt
8942 * and is dereferrenced in nfs4_exchange_id_release
8943 *
8944 * Upon success, add the new transport to the rpc_clnt
8945 *
8946 * @clnt: struct rpc_clnt to get new transport
8947 * @xprt: the rpc_xprt to test
8948 * @data: call data for _nfs4_proc_exchange_id.
8949 */
10e037d1 8950void nfs4_test_session_trunk(struct rpc_clnt *clnt, struct rpc_xprt *xprt,
04fa2c6b
AA		 8951 void *data)
8952{
7e7ce2cc 8953 struct nfs4_add_xprt_data *adata = data;
9c760d1f
TM		 8954 struct rpc_task *task;
8955 int status;
8956
04fa2c6b
AA		 8957 u32 sp4_how;
8958
8959 dprintk("--> %s try %s\n", __func__,
8960 xprt->address_strings[RPC_DISPLAY_ADDR]);
8961
8962 sp4_how = (adata->clp->cl_sp4_flags == 0 ? SP4_NONE : SP4_MACH_CRED);
8963
6bd1a77d 8964try_again:
04fa2c6b 8965 /* Test connection for session trunking. Async exchange_id call */
9c760d1f
TM		 8966 task = nfs4_run_exchange_id(adata->clp, adata->cred, sp4_how, xprt);
8967 if (IS_ERR(task))
10e037d1 8968 return;
9c760d1f
TM		 8969
8970 status = task->tk_status;
7e5ae43b 8971 if (status == 0) {
9c760d1f
TM		 8972 status = nfs4_detect_session_trunking(adata->clp,
8973 task->tk_msg.rpc_resp, xprt);
7e5ae43b
OK		 8974 trace_nfs4_trunked_exchange_id(adata->clp,
8975 xprt->address_strings[RPC_DISPLAY_ADDR], status);
8976 }
10e037d1
S		 8977 if (status == 0)
8978 rpc_clnt_xprt_switch_add_xprt(clnt, xprt);
6bd1a77d 8979 else if (status != -NFS4ERR_DELAY && rpc_clnt_xprt_switch_has_addr(clnt,
e818bd08
OK		 8980 (struct sockaddr *)&xprt->addr))
8981 rpc_clnt_xprt_switch_remove_xprt(clnt, xprt);
10e037d1 8982
9c760d1f 8983 rpc_put_task(task);
6bd1a77d
OK		 8984 if (status == -NFS4ERR_DELAY) {
8985 ssleep(1);
8986 goto try_again;
8987 }
2031cd1a 8988}
04fa2c6b 8989EXPORT_SYMBOL_GPL(nfs4_test_session_trunk);
2031cd1a 8990
66245539 8991static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
a52458b4 8992 const struct cred *cred)
66245539
TM		 8993{
8994 struct rpc_message msg = {
8995 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
8996 .rpc_argp = clp,
8997 .rpc_cred = cred,
8998 };
8999 int status;
9000
5a0c257f
N		 9001 status = rpc_call_sync(clp->cl_rpcclient, &msg,
9002 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN);
c6d01c6f 9003 trace_nfs4_destroy_clientid(clp, status);
66245539 9004 if (status)
02c67525 9005 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 9006 "DESTROY_CLIENTID.", status, clp->cl_hostname);
9007 return status;
9008}
9009
9010static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
a52458b4 9011 const struct cred *cred)
66245539
TM		 9012{
9013 unsigned int loop;
9014 int ret;
9015
9016 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
9017 ret = _nfs4_proc_destroy_clientid(clp, cred);
9018 switch (ret) {
9019 case -NFS4ERR_DELAY:
9020 case -NFS4ERR_CLIENTID_BUSY:
9021 ssleep(1);
9022 break;
9023 default:
9024 return ret;
9025 }
9026 }
9027 return 0;
9028}
9029
9030int nfs4_destroy_clientid(struct nfs_client *clp)
9031{
a52458b4 9032 const struct cred *cred;
66245539
TM		 9033 int ret = 0;
9034
9035 if (clp->cl_mvops->minor_version < 1)
9036 goto out;
9037 if (clp->cl_exchange_flags == 0)
9038 goto out;
05f4c350
CL		 9039 if (clp->cl_preserve_clid)
9040 goto out;
73d8bde5 9041 cred = nfs4_get_clid_cred(clp);
66245539 9042 ret = nfs4_proc_destroy_clientid(clp, cred);
a52458b4 9043 put_cred(cred);
66245539
TM		 9044 switch (ret) {
9045 case 0:
9046 case -NFS4ERR_STALE_CLIENTID:
9047 clp->cl_exchange_flags = 0;
9048 }
9049out:
9050 return ret;
9051}
9052
0efb01b2
DB		 9053#endif /* CONFIG_NFS_V4_1 */
9054
2050f0cc
AA		 9055struct nfs4_get_lease_time_data {
9056 struct nfs4_get_lease_time_args *args;
9057 struct nfs4_get_lease_time_res *res;
9058 struct nfs_client *clp;
9059};
9060
9061static void nfs4_get_lease_time_prepare(struct rpc_task *task,
9062 void *calldata)
9063{
2050f0cc
AA		 9064 struct nfs4_get_lease_time_data *data =
9065 (struct nfs4_get_lease_time_data *)calldata;
9066
2050f0cc
AA		 9067 /* just setup sequence, do not trigger session recovery
9068 since we're invoked within one */
7981c8a6 9069 nfs4_setup_sequence(data->clp,
d9afbd1b
TM		 9070 &data->args->la_seq_args,
9071 &data->res->lr_seq_res,
9072 task);
2050f0cc
AA		 9073}
9074
9075/*
9076 * Called from nfs4_state_manager thread for session setup, so don't recover
9077 * from sequence operation or clientid errors.
9078 */
9079static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
9080{
9081 struct nfs4_get_lease_time_data *data =
9082 (struct nfs4_get_lease_time_data *)calldata;
9083
0efb01b2 9084 if (!nfs4_sequence_done(task, &data->res->lr_seq_res))
14516c3a 9085 return;
2050f0cc
AA		 9086 switch (task->tk_status) {
9087 case -NFS4ERR_DELAY:
9088 case -NFS4ERR_GRACE:
2050f0cc
AA		 9089 rpc_delay(task, NFS4_POLL_RETRY_MIN);
9090 task->tk_status = 0;
df561f66 9091 fallthrough;
a8a4ae3a 9092 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 9093 rpc_restart_call_prepare(task);
2050f0cc
AA		 9094 return;
9095 }
2050f0cc
AA		 9096}
9097
17280175 9098static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 9099 .rpc_call_prepare = nfs4_get_lease_time_prepare,
9100 .rpc_call_done = nfs4_get_lease_time_done,
9101};
9102
9103int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
9104{
2050f0cc
AA		 9105 struct nfs4_get_lease_time_args args;
9106 struct nfs4_get_lease_time_res res = {
9107 .lr_fsinfo = fsinfo,
9108 };
9109 struct nfs4_get_lease_time_data data = {
9110 .args = &args,
9111 .res = &res,
9112 .clp = clp,
9113 };
9114 struct rpc_message msg = {
9115 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
9116 .rpc_argp = &args,
9117 .rpc_resp = &res,
9118 };
9119 struct rpc_task_setup task_setup = {
9120 .rpc_client = clp->cl_rpcclient,
9121 .rpc_message = &msg,
9122 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 9123 .callback_data = &data,
9124 .flags = RPC_TASK_TIMEOUT,
2050f0cc 9125 };
2050f0cc 9126
fba83f34 9127 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0, 1);
f836b27e 9128 return nfs4_call_sync_custom(&task_setup);
2050f0cc
AA		 9129}
9130
0efb01b2
DB		 9131#ifdef CONFIG_NFS_V4_1
9132
fc931582
AA		 9133/*
9134 * Initialize the values to be used by the client in CREATE_SESSION
9135 * If nfs4_init_session set the fore channel request and response sizes,
9136 * use them.
9137 *
9138 * Set the back channel max_resp_sz_cached to zero to force the client to
9139 * always set csa_cachethis to FALSE because the current implementation
9140 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
9141 */
6b26cc8c
CL		 9142static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args,
9143 struct rpc_clnt *clnt)
fc931582 9144{
18aad3d5 9145 unsigned int max_rqst_sz, max_resp_sz;
6b26cc8c 9146 unsigned int max_bc_payload = rpc_max_bc_payload(clnt);
7402a4fe 9147 unsigned int max_bc_slots = rpc_num_bc_slots(clnt);
18aad3d5
AA		 9148
9149 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
9150 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 9151
fc931582 9152 /* Fore channel attributes */
18aad3d5
AA		 9153 args->fc_attrs.max_rqst_sz = max_rqst_sz;
9154 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 9155 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 9156 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 9157
9158 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 9159 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 9160 __func__,
9161 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 9162 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 9163
9164 /* Back channel attributes */
6b26cc8c
CL		 9165 args->bc_attrs.max_rqst_sz = max_bc_payload;
9166 args->bc_attrs.max_resp_sz = max_bc_payload;
fc931582
AA		 9167 args->bc_attrs.max_resp_sz_cached = 0;
9168 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
62421cd9 9169 args->bc_attrs.max_reqs = max_t(unsigned short, max_session_cb_slots, 1);
7402a4fe
TM		 9170 if (args->bc_attrs.max_reqs > max_bc_slots)
9171 args->bc_attrs.max_reqs = max_bc_slots;
fc931582
AA		 9172
9173 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
9174 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
9175 __func__,
9176 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
9177 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
9178 args->bc_attrs.max_reqs);
9179}
9180
79969dd1
TM		 9181static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args,
9182 struct nfs41_create_session_res *res)
8d35301d 9183{
43c2e885 9184 struct nfs4_channel_attrs *sent = &args->fc_attrs;
79969dd1 9185 struct nfs4_channel_attrs *rcvd = &res->fc_attrs;
43c2e885 9186
43c2e885
BF		 9187 if (rcvd->max_resp_sz > sent->max_resp_sz)
9188 return -EINVAL;
9189 /*
9190 * Our requested max_ops is the minimum we need; we're not
9191 * prepared to break up compounds into smaller pieces than that.
9192 * So, no point even trying to continue if the server won't
9193 * cooperate:
9194 */
9195 if (rcvd->max_ops < sent->max_ops)
9196 return -EINVAL;
9197 if (rcvd->max_reqs == 0)
9198 return -EINVAL;
b4b9a0c1
VG		 9199 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
9200 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 9201 return 0;
8d35301d
AA		 9202}
9203
79969dd1
TM		 9204static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args,
9205 struct nfs41_create_session_res *res)
43c2e885
BF		 9206{
9207 struct nfs4_channel_attrs *sent = &args->bc_attrs;
79969dd1 9208 struct nfs4_channel_attrs *rcvd = &res->bc_attrs;
8d35301d 9209
b1c0df5f
TM		 9210 if (!(res->flags & SESSION4_BACK_CHAN))
9211 goto out;
43c2e885
BF		 9212 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
9213 return -EINVAL;
9214 if (rcvd->max_resp_sz < sent->max_resp_sz)
9215 return -EINVAL;
9216 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
9217 return -EINVAL;
5405fc44 9218 if (rcvd->max_ops > sent->max_ops)
43c2e885 9219 return -EINVAL;
5405fc44 9220 if (rcvd->max_reqs > sent->max_reqs)
43c2e885 9221 return -EINVAL;
b1c0df5f 9222out:
43c2e885
BF		 9223 return 0;
9224}
8d35301d 9225
8d35301d 9226static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
79969dd1 9227 struct nfs41_create_session_res *res)
8d35301d 9228{
43c2e885 9229 int ret;
8d35301d 9230
79969dd1 9231 ret = nfs4_verify_fore_channel_attrs(args, res);
43c2e885
BF		 9232 if (ret)
9233 return ret;
79969dd1
TM		 9234 return nfs4_verify_back_channel_attrs(args, res);
9235}
9236
9237static void nfs4_update_session(struct nfs4_session *session,
9238 struct nfs41_create_session_res *res)
9239{
9240 nfs4_copy_sessionid(&session->sess_id, &res->sessionid);
e11259f9
TM		 9241 /* Mark client id and session as being confirmed */
9242 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;
9243 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state);
79969dd1
TM		 9244 session->flags = res->flags;
9245 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs));
b1c0df5f
TM		 9246 if (res->flags & SESSION4_BACK_CHAN)
9247 memcpy(&session->bc_attrs, &res->bc_attrs,
9248 sizeof(session->bc_attrs));
8d35301d
AA		 9249}
9250
848f5bda 9251static int _nfs4_proc_create_session(struct nfs_client *clp,
a52458b4 9252 const struct cred *cred)
fc931582
AA		 9253{
9254 struct nfs4_session *session = clp->cl_session;
9255 struct nfs41_create_session_args args = {
9256 .client = clp,
79969dd1
TM		 9257 .clientid = clp->cl_clientid,
9258 .seqid = clp->cl_seqid,
fc931582
AA		 9259 .cb_program = NFS4_CALLBACK,
9260 };
79969dd1
TM		 9261 struct nfs41_create_session_res res;
9262
fc931582
AA		 9263 struct rpc_message msg = {
9264 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
9265 .rpc_argp = &args,
9266 .rpc_resp = &res,
848f5bda 9267 .rpc_cred = cred,
fc931582
AA		 9268 };
9269 int status;
9270
6b26cc8c 9271 nfs4_init_channel_attrs(&args, clp->cl_rpcclient);
0f91421e 9272 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 9273
5a0c257f
N		 9274 status = rpc_call_sync(session->clp->cl_rpcclient, &msg,
9275 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN);
c6d01c6f 9276 trace_nfs4_create_session(clp, status);
fc931582 9277
b519d408
TM		 9278 switch (status) {
9279 case -NFS4ERR_STALE_CLIENTID:
9280 case -NFS4ERR_DELAY:
9281 case -ETIMEDOUT:
9282 case -EACCES:
9283 case -EAGAIN:
9284 goto out;
8b98a532 9285 }
b519d408
TM		 9286
9287 clp->cl_seqid++;
43095d39 9288 if (!status) {
8d35301d 9289 /* Verify the session's negotiated channel_attrs values */
79969dd1 9290 status = nfs4_verify_channel_attrs(&args, &res);
fc931582 9291 /* Increment the clientid slot sequence id */
79969dd1
TM		 9292 if (status)
9293 goto out;
9294 nfs4_update_session(session, &res);
fc931582 9295 }
79969dd1 9296out:
fc931582
AA		 9297 return status;
9298}
9299
9300/*
9301 * Issues a CREATE_SESSION operation to the server.
9302 * It is the responsibility of the caller to verify the session is
9303 * expired before calling this routine.
9304 */
a52458b4 9305int nfs4_proc_create_session(struct nfs_client *clp, const struct cred *cred)
fc931582
AA		 9306{
9307 int status;
9308 unsigned *ptr;
fc931582 9309 struct nfs4_session *session = clp->cl_session;
f201bdfd
OK		 9310 struct nfs4_add_xprt_data xprtdata = {
9311 .clp = clp,
9312 };
9313 struct rpc_add_xprt_test rpcdata = {
9314 .add_xprt_test = clp->cl_mvops->session_trunk,
9315 .data = &xprtdata,
9316 };
fc931582
AA		 9317
9318 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
9319
848f5bda 9320 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 9321 if (status)
9322 goto out;
9323
aacd5537
AA		 9324 /* Init or reset the session slot tables */
9325 status = nfs4_setup_session_slot_tables(session);
9326 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 9327 if (status)
9328 goto out;
9329
9330 ptr = (unsigned *)&session->sess_id.data[0];
9331 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
9332 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
f201bdfd 9333 rpc_clnt_probe_trunked_xprts(clp->cl_rpcclient, &rpcdata);
fc931582 9334out:
fc931582
AA		 9335 return status;
9336}
9337
0f3e66c6
AA		 9338/*
9339 * Issue the over-the-wire RPC DESTROY_SESSION.
9340 * The caller must serialize access to this routine.
9341 */
848f5bda 9342int nfs4_proc_destroy_session(struct nfs4_session *session,
a52458b4 9343 const struct cred *cred)
0f3e66c6 9344{
848f5bda
TM		 9345 struct rpc_message msg = {
9346 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
9347 .rpc_argp = session,
9348 .rpc_cred = cred,
9349 };
0f3e66c6 9350 int status = 0;
0f3e66c6 9351
0f3e66c6 9352 /* session is still being setup */
e11259f9
TM		 9353 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state))
9354 return 0;
0f3e66c6 9355
5a0c257f
N		 9356 status = rpc_call_sync(session->clp->cl_rpcclient, &msg,
9357 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN);
c6d01c6f 9358 trace_nfs4_destroy_session(session->clp, status);
0f3e66c6
AA		 9359
9360 if (status)
08106ac7 9361 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6 9362 "Session has been destroyed regardless...\n", status);
88363d3e 9363 rpc_clnt_manage_trunked_xprts(session->clp->cl_rpcclient);
0f3e66c6
AA		 9364 return status;
9365}
9366
fc01cea9
AA		 9367/*
9368 * Renew the cl_session lease.
9369 */
d5f8d3fe
TM		 9370struct nfs4_sequence_data {
9371 struct nfs_client *clp;
9372 struct nfs4_sequence_args args;
9373 struct nfs4_sequence_res res;
9374};
9375
dc96aef9
AB		 9376static void nfs41_sequence_release(void *data)
9377{
d5f8d3fe
TM		 9378 struct nfs4_sequence_data *calldata = data;
9379 struct nfs_client *clp = calldata->clp;
dc96aef9 9380
212bf41d 9381 if (refcount_read(&clp->cl_count) > 1)
7135840f
AB		 9382 nfs4_schedule_state_renewal(clp);
9383 nfs_put_client(clp);
d5f8d3fe 9384 kfree(calldata);
dc96aef9
AB		 9385}
9386
aa5190d0
TM		 9387static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
9388{
9389 switch(task->tk_status) {
9390 case -NFS4ERR_DELAY:
aa5190d0
TM		 9391 rpc_delay(task, NFS4_POLL_RETRY_MAX);
9392 return -EAGAIN;
9393 default:
0400a6b0 9394 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 9395 }
9396 return 0;
9397}
9398
dc96aef9 9399static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 9400{
d5f8d3fe
TM		 9401 struct nfs4_sequence_data *calldata = data;
9402 struct nfs_client *clp = calldata->clp;
fc01cea9 9403
14516c3a
TM		 9404 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
9405 return;
fc01cea9 9406
c6d01c6f 9407 trace_nfs4_sequence(clp, task->tk_status);
6ad477a6 9408 if (task->tk_status < 0 && !task->tk_client->cl_shutdown) {
fc01cea9 9409 dprintk("%s ERROR %d\n", __func__, task->tk_status);
212bf41d 9410 if (refcount_read(&clp->cl_count) == 1)
86882c75 9411 return;
fc01cea9 9412
aa5190d0
TM		 9413 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
9414 rpc_restart_call_prepare(task);
fc01cea9
AA		 9415 return;
9416 }
9417 }
fc01cea9 9418 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
fc01cea9
AA		 9419}
9420
9421static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
9422{
d5f8d3fe
TM		 9423 struct nfs4_sequence_data *calldata = data;
9424 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 9425 struct nfs4_sequence_args *args;
9426 struct nfs4_sequence_res *res;
9427
fc01cea9
AA		 9428 args = task->tk_msg.rpc_argp;
9429 res = task->tk_msg.rpc_resp;
9430
7981c8a6 9431 nfs4_setup_sequence(clp, args, res, task);
fc01cea9
AA		 9432}
9433
9434static const struct rpc_call_ops nfs41_sequence_ops = {
9435 .rpc_call_done = nfs41_sequence_call_done,
9436 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 9437 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 9438};
9439
8fe72bac 9440static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
a52458b4 9441 const struct cred *cred,
3be0f80b 9442 struct nfs4_slot *slot,
8fe72bac 9443 bool is_privileged)
fc01cea9 9444{
d5f8d3fe 9445 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 9446 struct rpc_message msg = {
9447 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
9448 .rpc_cred = cred,
9449 };
71ac6da9
TM		 9450 struct rpc_task_setup task_setup_data = {
9451 .rpc_client = clp->cl_rpcclient,
9452 .rpc_message = &msg,
8fe72bac 9453 .callback_ops = &nfs41_sequence_ops,
85e39fee 9454 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT | RPC_TASK_MOVEABLE,
71ac6da9 9455 };
3be0f80b 9456 struct rpc_task *ret;
fc01cea9 9457
3be0f80b 9458 ret = ERR_PTR(-EIO);
212bf41d 9459 if (!refcount_inc_not_zero(&clp->cl_count))
3be0f80b
TM		 9460 goto out_err;
9461
9462 ret = ERR_PTR(-ENOMEM);
da48f267 9463 calldata = kzalloc(sizeof(*calldata), GFP_KERNEL);
3be0f80b
TM		 9464 if (calldata == NULL)
9465 goto out_put_clp;
fba83f34 9466 nfs4_init_sequence(&calldata->args, &calldata->res, 0, is_privileged);
3be0f80b 9467 nfs4_sequence_attach_slot(&calldata->args, &calldata->res, slot);
d5f8d3fe
TM		 9468 msg.rpc_argp = &calldata->args;
9469 msg.rpc_resp = &calldata->res;
9470 calldata->clp = clp;
71ac6da9 9471 task_setup_data.callback_data = calldata;
fc01cea9 9472
3be0f80b
TM		 9473 ret = rpc_run_task(&task_setup_data);
9474 if (IS_ERR(ret))
9475 goto out_err;
9476 return ret;
9477out_put_clp:
9478 nfs_put_client(clp);
9479out_err:
9480 nfs41_release_slot(slot);
9481 return ret;
71ac6da9
TM		 9482}
9483
a52458b4 9484static int nfs41_proc_async_sequence(struct nfs_client *clp, const struct cred *cred, unsigned renew_flags)
71ac6da9
TM		 9485{
9486 struct rpc_task *task;
9487 int ret = 0;
9488
2f60ea6b 9489 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
d1f456b0 9490 return -EAGAIN;
3be0f80b 9491 task = _nfs41_proc_sequence(clp, cred, NULL, false);
71ac6da9
TM		 9492 if (IS_ERR(task))
9493 ret = PTR_ERR(task);
9494 else
bf294b41 9495 rpc_put_task_async(task);
71ac6da9
TM		 9496 dprintk("<-- %s status=%d\n", __func__, ret);
9497 return ret;
9498}
9499
a52458b4 9500static int nfs4_proc_sequence(struct nfs_client *clp, const struct cred *cred)
71ac6da9
TM		 9501{
9502 struct rpc_task *task;
9503 int ret;
9504
3be0f80b 9505 task = _nfs41_proc_sequence(clp, cred, NULL, true);
71ac6da9
TM		 9506 if (IS_ERR(task)) {
9507 ret = PTR_ERR(task);
9508 goto out;
9509 }
9510 ret = rpc_wait_for_completion_task(task);
be824167 9511 if (!ret)
71ac6da9
TM		 9512 ret = task->tk_status;
9513 rpc_put_task(task);
9514out:
9515 dprintk("<-- %s status=%d\n", __func__, ret);
9516 return ret;
fc01cea9
AA		 9517}
9518
fce5c838
RL		 9519struct nfs4_reclaim_complete_data {
9520 struct nfs_client *clp;
9521 struct nfs41_reclaim_complete_args arg;
9522 struct nfs41_reclaim_complete_res res;
9523};
9524
9525static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
9526{
9527 struct nfs4_reclaim_complete_data *calldata = data;
9528
7981c8a6 9529 nfs4_setup_sequence(calldata->clp,
d9afbd1b
TM		 9530 &calldata->arg.seq_args,
9531 &calldata->res.seq_res,
9532 task);
fce5c838
RL		 9533}
9534
aa5190d0
TM		 9535static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
9536{
9537 switch(task->tk_status) {
9538 case 0:
57174593 9539 wake_up_all(&clp->cl_lock_waitq);
df561f66 9540 fallthrough;
aa5190d0
TM		 9541 case -NFS4ERR_COMPLETE_ALREADY:
9542 case -NFS4ERR_WRONG_CRED: /* What to do here? */
9543 break;
9544 case -NFS4ERR_DELAY:
aa5190d0 9545 rpc_delay(task, NFS4_POLL_RETRY_MAX);
df561f66 9546 fallthrough;
a8a4ae3a 9547 case -NFS4ERR_RETRY_UNCACHED_REP:
e35a5e78
ZX		 9548 case -EACCES:
9549 dprintk("%s: failed to reclaim complete error %d for server %s, retrying\n",
9550 __func__, task->tk_status, clp->cl_hostname);
aa5190d0 9551 return -EAGAIN;
0048fdd0
TM		 9552 case -NFS4ERR_BADSESSION:
9553 case -NFS4ERR_DEADSESSION:
9554 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
0048fdd0 9555 break;
aa5190d0 9556 default:
0400a6b0 9557 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 9558 }
9559 return 0;
9560}
9561
fce5c838
RL		 9562static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
9563{
9564 struct nfs4_reclaim_complete_data *calldata = data;
9565 struct nfs_client *clp = calldata->clp;
9566 struct nfs4_sequence_res *res = &calldata->res.seq_res;
9567
14516c3a
TM		 9568 if (!nfs41_sequence_done(task, res))
9569 return;
fce5c838 9570
c6d01c6f 9571 trace_nfs4_reclaim_complete(clp, task->tk_status);
aa5190d0
TM		 9572 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
9573 rpc_restart_call_prepare(task);
9574 return;
9575 }
fce5c838
RL		 9576}
9577
9578static void nfs4_free_reclaim_complete_data(void *data)
9579{
9580 struct nfs4_reclaim_complete_data *calldata = data;
9581
9582 kfree(calldata);
9583}
9584
9585static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
9586 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
9587 .rpc_call_done = nfs4_reclaim_complete_done,
9588 .rpc_release = nfs4_free_reclaim_complete_data,
9589};
9590
9591/*
9592 * Issue a global reclaim complete.
9593 */
965e9c23 9594static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
a52458b4 9595 const struct cred *cred)
fce5c838
RL		 9596{
9597 struct nfs4_reclaim_complete_data *calldata;
fce5c838
RL		 9598 struct rpc_message msg = {
9599 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 9600 .rpc_cred = cred,
fce5c838
RL		 9601 };
9602 struct rpc_task_setup task_setup_data = {
9603 .rpc_client = clp->cl_rpcclient,
9604 .rpc_message = &msg,
9605 .callback_ops = &nfs4_reclaim_complete_call_ops,
4c952e3d 9606 .flags = RPC_TASK_NO_ROUND_ROBIN,
fce5c838
RL		 9607 };
9608 int status = -ENOMEM;
9609
8535b2be 9610 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 9611 if (calldata == NULL)
9612 goto out;
9613 calldata->clp = clp;
9614 calldata->arg.one_fs = 0;
fce5c838 9615
fba83f34 9616 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0, 1);
fce5c838
RL		 9617 msg.rpc_argp = &calldata->arg;
9618 msg.rpc_resp = &calldata->res;
9619 task_setup_data.callback_data = calldata;
4c952e3d 9620 status = nfs4_call_sync_custom(&task_setup_data);
fce5c838
RL		 9621out:
9622 dprintk("<-- %s status=%d\n", __func__, status);
9623 return status;
9624}
b1f69b75
AA		 9625
9626static void
9627nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
9628{
9629 struct nfs4_layoutget *lgp = calldata;
c31663d4 9630 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
b1f69b75 9631
7981c8a6 9632 nfs4_setup_sequence(server->nfs_client, &lgp->args.seq_args,
183d9e7b 9633 &lgp->res.seq_res, task);
b1f69b75
AA		 9634}
9635
9636static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
9637{
9638 struct nfs4_layoutget *lgp = calldata;
183d9e7b 9639
2e80dbe7 9640 nfs41_sequence_process(task, &lgp->res.seq_res);
183d9e7b
JL		 9641}
9642
9643static int
9644nfs4_layoutget_handle_exception(struct rpc_task *task,
9645 struct nfs4_layoutget *lgp, struct nfs4_exception *exception)
9646{
ee314c2a
TM		 9647 struct inode *inode = lgp->args.inode;
9648 struct nfs_server *server = NFS_SERVER(inode);
b4e89bcb 9649 struct pnfs_layout_hdr *lo = lgp->lo;
e85d7ee4
TM		 9650 int nfs4err = task->tk_status;
9651 int err, status = 0;
f7db0b28 9652 LIST_HEAD(head);
b1f69b75 9653
ed7e5423 9654 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
b1f69b75 9655
2dbf8dff
TM		 9656 nfs4_sequence_free_slot(&lgp->res.seq_res);
9657
6e7434ab
TM		 9658 exception->state = NULL;
9659 exception->stateid = NULL;
9660
e85d7ee4 9661 switch (nfs4err) {
b1f69b75 9662 case 0:
ee314c2a 9663 goto out;
7c1e6e58
PT		 9664
9665 /*
9666 * NFS4ERR_LAYOUTUNAVAILABLE means we are not supposed to use pnfs
9667 * on the file. set tk_status to -ENODATA to tell upper layer to
9668 * retry go inband.
9669 */
9670 case -NFS4ERR_LAYOUTUNAVAILABLE:
183d9e7b 9671 status = -ENODATA;
7c1e6e58 9672 goto out;
21b874c8
TM		 9673 /*
9674 * NFS4ERR_BADLAYOUT means the MDS cannot return a layout of
9675 * length lgp->args.minlength != 0 (see RFC5661 section 18.43.3).
9676 */
9677 case -NFS4ERR_BADLAYOUT:
183d9e7b
JL		 9678 status = -EOVERFLOW;
9679 goto out;
ed7e5423
BH		 9680 /*
9681 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
21b874c8
TM		 9682 * (or clients) writing to the same RAID stripe except when
9683 * the minlength argument is 0 (see RFC5661 section 18.43.3).
183d9e7b
JL		 9684 *
9685 * Treat it like we would RECALLCONFLICT -- we retry for a little
9686 * while, and then eventually give up.
ed7e5423 9687 */
b1f69b75 9688 case -NFS4ERR_LAYOUTTRYLATER:
183d9e7b
JL		 9689 if (lgp->args.minlength == 0) {
9690 status = -EOVERFLOW;
9691 goto out;
ed7e5423 9692 }
e85d7ee4
TM		 9693 status = -EBUSY;
9694 break;
183d9e7b 9695 case -NFS4ERR_RECALLCONFLICT:
037e56a2 9696 case -NFS4ERR_RETURNCONFLICT:
183d9e7b 9697 status = -ERECALLCONFLICT;
e85d7ee4 9698 break;
26f47443
TM		 9699 case -NFS4ERR_DELEG_REVOKED:
9700 case -NFS4ERR_ADMIN_REVOKED:
ee314c2a
TM		 9701 case -NFS4ERR_EXPIRED:
9702 case -NFS4ERR_BAD_STATEID:
183d9e7b 9703 exception->timeout = 0;
ee314c2a 9704 spin_lock(&inode->i_lock);
f7db0b28
TM		 9705 /* If the open stateid was bad, then recover it. */
9706 if (!lo || test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) ||
e8fa33a6 9707 !nfs4_stateid_match_other(&lgp->args.stateid, &lo->plh_stateid)) {
ee314c2a 9708 spin_unlock(&inode->i_lock);
183d9e7b 9709 exception->state = lgp->args.ctx->state;
26f47443 9710 exception->stateid = &lgp->args.stateid;
2259f960
TM		 9711 break;
9712 }
f7db0b28
TM		 9713
9714 /*
9715 * Mark the bad layout state as invalid, then retry
9716 */
668f455d 9717 pnfs_mark_layout_stateid_invalid(lo, &head);
f7db0b28 9718 spin_unlock(&inode->i_lock);
1f18b82c 9719 nfs_commit_inode(inode, 0);
f7db0b28
TM		 9720 pnfs_free_lseg_list(&head);
9721 status = -EAGAIN;
9722 goto out;
b1f69b75 9723 }
183d9e7b 9724
e85d7ee4
TM		 9725 err = nfs4_handle_exception(server, nfs4err, exception);
9726 if (!status) {
9727 if (exception->retry)
9728 status = -EAGAIN;
9729 else
9730 status = err;
9731 }
ee314c2a 9732out:
183d9e7b 9733 return status;
b1f69b75
AA		 9734}
9735
dacb452d 9736size_t max_response_pages(struct nfs_server *server)
8554116e
IK		 9737{
9738 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
9739 return nfs_page_array_len(0, max_resp_sz);
9740}
9741
b1f69b75
AA		 9742static void nfs4_layoutget_release(void *calldata)
9743{
9744 struct nfs4_layoutget *lgp = calldata;
9745
bd171930 9746 nfs4_sequence_free_slot(&lgp->res.seq_res);
29a8bfe5 9747 pnfs_layoutget_free(lgp);
b1f69b75
AA		 9748}
9749
9750static const struct rpc_call_ops nfs4_layoutget_call_ops = {
9751 .rpc_call_prepare = nfs4_layoutget_prepare,
9752 .rpc_call_done = nfs4_layoutget_done,
9753 .rpc_release = nfs4_layoutget_release,
9754};
9755
a0b0a6e3 9756struct pnfs_layout_segment *
6e7434ab
TM		 9757nfs4_proc_layoutget(struct nfs4_layoutget *lgp,
9758 struct nfs4_exception *exception)
b1f69b75 9759{
a47970ff
WAA		 9760 struct inode *inode = lgp->args.inode;
9761 struct nfs_server *server = NFS_SERVER(inode);
b1f69b75
AA		 9762 struct rpc_task *task;
9763 struct rpc_message msg = {
9764 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
9765 .rpc_argp = &lgp->args,
9766 .rpc_resp = &lgp->res,
6ab59344 9767 .rpc_cred = lgp->cred,
b1f69b75
AA		 9768 };
9769 struct rpc_task_setup task_setup_data = {
9770 .rpc_client = server->client,
9771 .rpc_message = &msg,
9772 .callback_ops = &nfs4_layoutget_call_ops,
9773 .callback_data = lgp,
85e39fee
OK		 9774 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF |
9775 RPC_TASK_MOVEABLE,
b1f69b75 9776 };
a0b0a6e3 9777 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 9778 int status = 0;
9779
fba83f34 9780 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0, 0);
6e7434ab 9781 exception->retry = 0;
a47970ff 9782
b1f69b75 9783 task = rpc_run_task(&task_setup_data);
68b78dcd
TM		 9784 if (IS_ERR(task))
9785 return ERR_CAST(task);
6e47666e 9786
820bf85c 9787 status = rpc_wait_for_completion_task(task);
2dbf8dff
TM		 9788 if (status != 0)
9789 goto out;
9790
18c0778a 9791 if (task->tk_status < 0) {
6e7434ab
TM		 9792 exception->retry = 1;
9793 status = nfs4_layoutget_handle_exception(task, lgp, exception);
18c0778a 9794 } else if (lgp->res.layoutp->len == 0) {
6e7434ab 9795 exception->retry = 1;
18c0778a 9796 status = -EAGAIN;
6e7434ab 9797 nfs4_update_delay(&exception->timeout);
2dbf8dff
TM		 9798 } else
9799 lseg = pnfs_layout_process(lgp);
9800out:
1037e6ea
TM		 9801 trace_nfs4_layoutget(lgp->args.ctx,
9802 &lgp->args.range,
9803 &lgp->res.range,
48c9579a 9804 &lgp->res.stateid,
1037e6ea 9805 status);
183d9e7b 9806
b1f69b75
AA		 9807 rpc_put_task(task);
9808 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 9809 if (status)
9810 return ERR_PTR(status);
9811 return lseg;
b1f69b75
AA		 9812}
9813
cbe82603
BH		 9814static void
9815nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
9816{
9817 struct nfs4_layoutreturn *lrp = calldata;
9818
7981c8a6 9819 nfs4_setup_sequence(lrp->clp,
d9afbd1b
TM		 9820 &lrp->args.seq_args,
9821 &lrp->res.seq_res,
9822 task);
c8bf7073
TM		 9823 if (!pnfs_layout_is_valid(lrp->args.layout))
9824 rpc_exit(task, 0);
cbe82603
BH		 9825}
9826
9827static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
9828{
9829 struct nfs4_layoutreturn *lrp = calldata;
9830 struct nfs_server *server;
9831
2e80dbe7 9832 if (!nfs41_sequence_process(task, &lrp->res.seq_res))
cbe82603
BH		 9833 return;
9834
6109bcf7
TM		 9835 /*
9836 * Was there an RPC level error? Assume the call succeeded,
9837 * and that we need to release the layout
9838 */
9839 if (task->tk_rpc_status != 0 && RPC_WAS_SENT(task)) {
9840 lrp->res.lrs_present = 0;
9841 return;
9842 }
9843
cbe82603 9844 server = NFS_SERVER(lrp->args.inode);
f22e5edd 9845 switch (task->tk_status) {
ff90514e 9846 case -NFS4ERR_OLD_STATEID:
30cb3ee2 9847 if (nfs4_layout_refresh_old_stateid(&lrp->args.stateid,
ecf84026 9848 &lrp->args.range,
ff90514e
TM		 9849 lrp->args.inode))
9850 goto out_restart;
df561f66 9851 fallthrough;
f22e5edd
TM		 9852 default:
9853 task->tk_status = 0;
df561f66 9854 fallthrough;
f22e5edd
TM		 9855 case 0:
9856 break;
9857 case -NFS4ERR_DELAY:
8478eaa1 9858 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
f22e5edd 9859 break;
ff90514e 9860 goto out_restart;
cbe82603 9861 }
ff90514e
TM		 9862 return;
9863out_restart:
9864 task->tk_status = 0;
9865 nfs4_sequence_free_slot(&lrp->res.seq_res);
9866 rpc_restart_call_prepare(task);
cbe82603
BH		 9867}
9868
9869static void nfs4_layoutreturn_release(void *calldata)
9870{
9871 struct nfs4_layoutreturn *lrp = calldata;
849b286f 9872 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603 9873
2a974425 9874 pnfs_layoutreturn_free_lsegs(lo, &lrp->args.stateid, &lrp->args.range,
68f74479 9875 lrp->res.lrs_present ? &lrp->res.stateid : NULL);
2e80dbe7 9876 nfs4_sequence_free_slot(&lrp->res.seq_res);
4d796d75
TM		 9877 if (lrp->ld_private.ops && lrp->ld_private.ops->free)
9878 lrp->ld_private.ops->free(&lrp->ld_private);
2f065ddb
TM		 9879 pnfs_put_layout_hdr(lrp->args.layout);
9880 nfs_iput_and_deactive(lrp->inode);
44ea8dfc 9881 put_cred(lrp->cred);
cbe82603 9882 kfree(calldata);
cbe82603
BH		 9883}
9884
9885static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
9886 .rpc_call_prepare = nfs4_layoutreturn_prepare,
9887 .rpc_call_done = nfs4_layoutreturn_done,
9888 .rpc_release = nfs4_layoutreturn_release,
9889};
9890
6c16605d 9891int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync)
cbe82603
BH		 9892{
9893 struct rpc_task *task;
9894 struct rpc_message msg = {
9895 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
9896 .rpc_argp = &lrp->args,
9897 .rpc_resp = &lrp->res,
9556000d 9898 .rpc_cred = lrp->cred,
cbe82603
BH		 9899 };
9900 struct rpc_task_setup task_setup_data = {
1771c577 9901 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
cbe82603
BH		 9902 .rpc_message = &msg,
9903 .callback_ops = &nfs4_layoutreturn_call_ops,
9904 .callback_data = lrp,
85e39fee 9905 .flags = RPC_TASK_MOVEABLE,
cbe82603 9906 };
6c16605d 9907 int status = 0;
cbe82603 9908
99ade3c7
AE		 9909 nfs4_state_protect(NFS_SERVER(lrp->args.inode)->nfs_client,
9910 NFS_SP4_MACH_CRED_PNFS_CLEANUP,
9911 &task_setup_data.rpc_client, &msg);
9912
c3aba897 9913 lrp->inode = nfs_igrab_and_active(lrp->args.inode);
5a0ec8ac 9914 if (!sync) {
5a0ec8ac
TM		 9915 if (!lrp->inode) {
9916 nfs4_layoutreturn_release(lrp);
9917 return -EAGAIN;
9918 }
9919 task_setup_data.flags |= RPC_TASK_ASYNC;
9920 }
c3aba897
TM		 9921 if (!lrp->inode)
9922 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1,
9923 1);
9924 else
9925 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1,
9926 0);
cbe82603
BH		 9927 task = rpc_run_task(&task_setup_data);
9928 if (IS_ERR(task))
9929 return PTR_ERR(task);
5a0ec8ac
TM		 9930 if (sync)
9931 status = task->tk_status;
48c9579a 9932 trace_nfs4_layoutreturn(lrp->args.inode, &lrp->args.stateid, status);
cbe82603
BH		 9933 dprintk("<-- %s status=%d\n", __func__, status);
9934 rpc_put_task(task);
9935 return status;
9936}
9937
b1f69b75 9938static int
cd5875fe
TM		 9939_nfs4_proc_getdeviceinfo(struct nfs_server *server,
9940 struct pnfs_device *pdev,
a52458b4 9941 const struct cred *cred)
b1f69b75
AA		 9942{
9943 struct nfs4_getdeviceinfo_args args = {
9944 .pdev = pdev,
4e590803
TM		 9945 .notify_types = NOTIFY_DEVICEID4_CHANGE |
9946 NOTIFY_DEVICEID4_DELETE,
b1f69b75
AA		 9947 };
9948 struct nfs4_getdeviceinfo_res res = {
9949 .pdev = pdev,
9950 };
9951 struct rpc_message msg = {
9952 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
9953 .rpc_argp = &args,
9954 .rpc_resp = &res,
cd5875fe 9955 .rpc_cred = cred,
b1f69b75
AA		 9956 };
9957 int status;
9958
7c513058 9959 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4e590803
TM		 9960 if (res.notification & ~args.notify_types)
9961 dprintk("%s: unsupported notification\n", __func__);
df52699e
TM		 9962 if (res.notification != args.notify_types)
9963 pdev->nocache = 1;
4e590803 9964
cac1d3a2
TM		 9965 trace_nfs4_getdeviceinfo(server, &pdev->dev_id, status);
9966
b1f69b75
AA		 9967 dprintk("<-- %s status=%d\n", __func__, status);
9968
9969 return status;
9970}
9971
cd5875fe
TM		 9972int nfs4_proc_getdeviceinfo(struct nfs_server *server,
9973 struct pnfs_device *pdev,
a52458b4 9974 const struct cred *cred)
b1f69b75
AA		 9975{
9976 struct nfs4_exception exception = { };
9977 int err;
9978
9979 do {
9980 err = nfs4_handle_exception(server,
cd5875fe 9981 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 9982 &exception);
9983 } while (exception.retry);
9984 return err;
9985}
9986EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
9987
863a3c6c
AA		 9988static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
9989{
9990 struct nfs4_layoutcommit_data *data = calldata;
9991 struct nfs_server *server = NFS_SERVER(data->args.inode);
9992
7981c8a6 9993 nfs4_setup_sequence(server->nfs_client,
d9afbd1b
TM		 9994 &data->args.seq_args,
9995 &data->res.seq_res,
9996 task);
863a3c6c
AA		 9997}
9998
9999static void
10000nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
10001{
10002 struct nfs4_layoutcommit_data *data = calldata;
10003 struct nfs_server *server = NFS_SERVER(data->args.inode);
10004
6ba7db34 10005 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 10006 return;
10007
10008 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 10009 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
10010 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
10011 case -NFS4ERR_BADLAYOUT: /* no layout */
10012 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 10013 task->tk_status = 0;
ffb81717 10014 break;
e59d27e0 10015 case 0:
e59d27e0
TM		 10016 break;
10017 default:
8478eaa1 10018 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) {
e59d27e0
TM		 10019 rpc_restart_call_prepare(task);
10020 return;
10021 }
10022 }
863a3c6c
AA		 10023}
10024
10025static void nfs4_layoutcommit_release(void *calldata)
10026{
10027 struct nfs4_layoutcommit_data *data = calldata;
10028
db29c089 10029 pnfs_cleanup_layoutcommit(data);
d8c951c3
TM		 10030 nfs_post_op_update_inode_force_wcc(data->args.inode,
10031 data->res.fattr);
a52458b4 10032 put_cred(data->cred);
472e2594 10033 nfs_iput_and_deactive(data->inode);
863a3c6c
AA		 10034 kfree(data);
10035}
10036
10037static const struct rpc_call_ops nfs4_layoutcommit_ops = {
10038 .rpc_call_prepare = nfs4_layoutcommit_prepare,
10039 .rpc_call_done = nfs4_layoutcommit_done,
10040 .rpc_release = nfs4_layoutcommit_release,
10041};
10042
10043int
ef311537 10044nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 10045{
10046 struct rpc_message msg = {
10047 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
10048 .rpc_argp = &data->args,
10049 .rpc_resp = &data->res,
10050 .rpc_cred = data->cred,
10051 };
10052 struct rpc_task_setup task_setup_data = {
10053 .task = &data->task,
10054 .rpc_client = NFS_CLIENT(data->args.inode),
10055 .rpc_message = &msg,
10056 .callback_ops = &nfs4_layoutcommit_ops,
10057 .callback_data = data,
85e39fee 10058 .flags = RPC_TASK_MOVEABLE,
863a3c6c
AA		 10059 };
10060 struct rpc_task *task;
10061 int status = 0;
10062
b4839ebe
KM		 10063 dprintk("NFS: initiating layoutcommit call. sync %d "
10064 "lbw: %llu inode %lu\n", sync,
863a3c6c
AA		 10065 data->args.lastbytewritten,
10066 data->args.inode->i_ino);
10067
472e2594
TM		 10068 if (!sync) {
10069 data->inode = nfs_igrab_and_active(data->args.inode);
10070 if (data->inode == NULL) {
10071 nfs4_layoutcommit_release(data);
10072 return -EAGAIN;
10073 }
10074 task_setup_data.flags = RPC_TASK_ASYNC;
10075 }
fba83f34 10076 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 0);
863a3c6c
AA		 10077 task = rpc_run_task(&task_setup_data);
10078 if (IS_ERR(task))
10079 return PTR_ERR(task);
472e2594
TM		 10080 if (sync)
10081 status = task->tk_status;
48c9579a 10082 trace_nfs4_layoutcommit(data->args.inode, &data->args.stateid, status);
863a3c6c
AA		 10083 dprintk("%s: status %d\n", __func__, status);
10084 rpc_put_task(task);
10085 return status;
10086}
fca78d6d 10087
302fad7b 10088/*
97431204
AA		 10089 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
10090 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
10091 */
fca78d6d
BS		 10092static int
10093_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
b1b3e136
WAA		 10094 struct nfs_fsinfo *info,
10095 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
fca78d6d
BS		 10096{
10097 struct nfs41_secinfo_no_name_args args = {
10098 .style = SECINFO_STYLE_CURRENT_FH,
10099 };
10100 struct nfs4_secinfo_res res = {
10101 .flavors = flavors,
10102 };
10103 struct rpc_message msg = {
10104 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
10105 .rpc_argp = &args,
10106 .rpc_resp = &res,
10107 };
cc15e24a
AS		 10108 struct nfs4_call_sync_data data = {
10109 .seq_server = server,
10110 .seq_args = &args.seq_args,
10111 .seq_res = &res.seq_res,
10112 };
10113 struct rpc_task_setup task_setup = {
10114 .rpc_client = server->client,
10115 .rpc_message = &msg,
10116 .callback_ops = server->nfs_client->cl_mvops->call_sync_ops,
10117 .callback_data = &data,
10118 .flags = RPC_TASK_NO_ROUND_ROBIN,
10119 };
a52458b4 10120 const struct cred *cred = NULL;
b1b3e136
WAA		 10121 int status;
10122
10123 if (use_integrity) {
48bb6ec1 10124 task_setup.rpc_client = server->nfs_client->cl_rpcclient;
cc15e24a 10125
7cb852df
WAA		 10126 cred = nfs4_get_clid_cred(server->nfs_client);
10127 msg.rpc_cred = cred;
b1b3e136
WAA		 10128 }
10129
cc15e24a
AS		 10130 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0);
10131 status = nfs4_call_sync_custom(&task_setup);
b1b3e136
WAA		 10132 dprintk("<-- %s status=%d\n", __func__, status);
10133
a52458b4 10134 put_cred(cred);
b1b3e136
WAA		 10135
10136 return status;
fca78d6d
BS		 10137}
10138
10139static int
10140nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
10141 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
10142{
0688e64b
TM		 10143 struct nfs4_exception exception = {
10144 .interruptible = true,
10145 };
fca78d6d
BS		 10146 int err;
10147 do {
b1b3e136
WAA		 10148 /* first try using integrity protection */
10149 err = -NFS4ERR_WRONGSEC;
10150
10151 /* try to use integrity protection with machine cred */
10152 if (_nfs4_is_integrity_protected(server->nfs_client))
10153 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
10154 flavors, true);
10155
10156 /*
10157 * if unable to use integrity protection, or SECINFO with
10158 * integrity protection returns NFS4ERR_WRONGSEC (which is
10159 * disallowed by spec, but exists in deployed servers) use
10160 * the current filesystem's rpc_client and the user cred.
10161 */
10162 if (err == -NFS4ERR_WRONGSEC)
10163 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
10164 flavors, false);
10165
fca78d6d
BS		 10166 switch (err) {
10167 case 0:
10168 case -NFS4ERR_WRONGSEC:
78b19bae 10169 case -ENOTSUPP:
05e9cfb4 10170 goto out;
fca78d6d
BS		 10171 default:
10172 err = nfs4_handle_exception(server, err, &exception);
10173 }
10174 } while (exception.retry);
05e9cfb4 10175out:
fca78d6d
BS		 10176 return err;
10177}
10178
10179static int
10180nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
10181 struct nfs_fsinfo *info)
10182{
10183 int err;
10184 struct page *page;
367156d9 10185 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
fca78d6d 10186 struct nfs4_secinfo_flavors *flavors;
58a8cf12
WAA		 10187 struct nfs4_secinfo4 *secinfo;
10188 int i;
fca78d6d
BS		 10189
10190 page = alloc_page(GFP_KERNEL);
10191 if (!page) {
10192 err = -ENOMEM;
10193 goto out;
10194 }
10195
10196 flavors = page_address(page);
10197 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
10198
10199 /*
10200 * Fall back on "guess and check" method if
10201 * the server doesn't support SECINFO_NO_NAME
10202 */
78b19bae 10203 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
fca78d6d
BS		 10204 err = nfs4_find_root_sec(server, fhandle, info);
10205 goto out_freepage;
10206 }
10207 if (err)
10208 goto out_freepage;
10209
58a8cf12
WAA		 10210 for (i = 0; i < flavors->num_flavors; i++) {
10211 secinfo = &flavors->flavors[i];
10212
10213 switch (secinfo->flavor) {
10214 case RPC_AUTH_NULL:
10215 case RPC_AUTH_UNIX:
10216 case RPC_AUTH_GSS:
10217 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
10218 &secinfo->flavor_info);
10219 break;
10220 default:
10221 flavor = RPC_AUTH_MAXFLAVOR;
10222 break;
10223 }
10224
4d4b69dd
WAA		 10225 if (!nfs_auth_info_match(&server->auth_info, flavor))
10226 flavor = RPC_AUTH_MAXFLAVOR;
10227
58a8cf12
WAA		 10228 if (flavor != RPC_AUTH_MAXFLAVOR) {
10229 err = nfs4_lookup_root_sec(server, fhandle,
10230 info, flavor);
10231 if (!err)
10232 break;
10233 }
10234 }
10235
10236 if (flavor == RPC_AUTH_MAXFLAVOR)
10237 err = -EPERM;
fca78d6d
BS		 10238
10239out_freepage:
10240 put_page(page);
10241 if (err == -EACCES)
10242 return -EPERM;
10243out:
10244 return err;
10245}
1cab0652 10246
ab7cb0df
TM		 10247static int _nfs41_test_stateid(struct nfs_server *server,
10248 nfs4_stateid *stateid,
a52458b4 10249 const struct cred *cred)
7d974794
BS		 10250{
10251 int status;
10252 struct nfs41_test_stateid_args args = {
1cab0652 10253 .stateid = stateid,
7d974794
BS		 10254 };
10255 struct nfs41_test_stateid_res res;
10256 struct rpc_message msg = {
10257 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
10258 .rpc_argp = &args,
10259 .rpc_resp = &res,
ab7cb0df 10260 .rpc_cred = cred,
7d974794 10261 };
3787d506
WAA		 10262 struct rpc_clnt *rpc_client = server->client;
10263
10264 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
10265 &rpc_client, &msg);
1cab0652 10266
38527b15 10267 dprintk("NFS call test_stateid %p\n", stateid);
fba83f34 10268 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1);
3787d506 10269 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8fe72bac 10270 &args.seq_args, &res.seq_res);
38527b15
CL		 10271 if (status != NFS_OK) {
10272 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 10273 return status;
38527b15
CL		 10274 }
10275 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 10276 return -res.status;
7d974794
BS		 10277}
10278
43912bbb
TM		 10279static void nfs4_handle_delay_or_session_error(struct nfs_server *server,
10280 int err, struct nfs4_exception *exception)
10281{
10282 exception->retry = 0;
10283 switch(err) {
10284 case -NFS4ERR_DELAY:
76e8a1bd 10285 case -NFS4ERR_RETRY_UNCACHED_REP:
43912bbb
TM		 10286 nfs4_handle_exception(server, err, exception);
10287 break;
10288 case -NFS4ERR_BADSESSION:
10289 case -NFS4ERR_BADSLOT:
10290 case -NFS4ERR_BAD_HIGH_SLOT:
10291 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
10292 case -NFS4ERR_DEADSESSION:
10293 nfs4_do_handle_exception(server, err, exception);
10294 }
10295}
10296
38527b15
CL		 10297/**
10298 * nfs41_test_stateid - perform a TEST_STATEID operation
10299 *
10300 * @server: server / transport on which to perform the operation
10301 * @stateid: state ID to test
ab7cb0df 10302 * @cred: credential
38527b15
CL		 10303 *
10304 * Returns NFS_OK if the server recognizes that "stateid" is valid.
10305 * Otherwise a negative NFS4ERR value is returned if the operation
10306 * failed or the state ID is not currently valid.
10307 */
ab7cb0df
TM		 10308static int nfs41_test_stateid(struct nfs_server *server,
10309 nfs4_stateid *stateid,
a52458b4 10310 const struct cred *cred)
7d974794 10311{
0688e64b
TM		 10312 struct nfs4_exception exception = {
10313 .interruptible = true,
10314 };
7d974794
BS		 10315 int err;
10316 do {
ab7cb0df 10317 err = _nfs41_test_stateid(server, stateid, cred);
43912bbb 10318 nfs4_handle_delay_or_session_error(server, err, &exception);
7d974794
BS		 10319 } while (exception.retry);
10320 return err;
10321}
9aeda35f 10322
7c1d5fae
TM		 10323struct nfs_free_stateid_data {
10324 struct nfs_server *server;
10325 struct nfs41_free_stateid_args args;
9aeda35f 10326 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 10327};
10328
10329static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
10330{
10331 struct nfs_free_stateid_data *data = calldata;
7981c8a6 10332 nfs4_setup_sequence(data->server->nfs_client,
7c1d5fae
TM		 10333 &data->args.seq_args,
10334 &data->res.seq_res,
10335 task);
10336}
10337
10338static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
10339{
10340 struct nfs_free_stateid_data *data = calldata;
10341
10342 nfs41_sequence_done(task, &data->res.seq_res);
10343
10344 switch (task->tk_status) {
10345 case -NFS4ERR_DELAY:
8478eaa1 10346 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN)
7c1d5fae
TM		 10347 rpc_restart_call_prepare(task);
10348 }
10349}
10350
10351static void nfs41_free_stateid_release(void *calldata)
10352{
576acc25
SM		 10353 struct nfs_free_stateid_data *data = calldata;
10354 struct nfs_client *clp = data->server->nfs_client;
10355
10356 nfs_put_client(clp);
7c1d5fae
TM		 10357 kfree(calldata);
10358}
10359
17f26b12 10360static const struct rpc_call_ops nfs41_free_stateid_ops = {
7c1d5fae
TM		 10361 .rpc_call_prepare = nfs41_free_stateid_prepare,
10362 .rpc_call_done = nfs41_free_stateid_done,
10363 .rpc_release = nfs41_free_stateid_release,
10364};
10365
2f261020
AS		 10366/**
10367 * nfs41_free_stateid - perform a FREE_STATEID operation
10368 *
10369 * @server: server / transport on which to perform the operation
10370 * @stateid: state ID to release
10371 * @cred: credential
302fad7b 10372 * @privileged: set to true if this call needs to be privileged
2f261020
AS		 10373 *
10374 * Note: this function is always asynchronous.
10375 */
10376static int nfs41_free_stateid(struct nfs_server *server,
f0b0bf88 10377 const nfs4_stateid *stateid,
a52458b4 10378 const struct cred *cred,
7c1d5fae
TM		 10379 bool privileged)
10380{
9aeda35f
BS		 10381 struct rpc_message msg = {
10382 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 10383 .rpc_cred = cred,
9aeda35f 10384 };
7c1d5fae
TM		 10385 struct rpc_task_setup task_setup = {
10386 .rpc_client = server->client,
10387 .rpc_message = &msg,
10388 .callback_ops = &nfs41_free_stateid_ops,
85e39fee 10389 .flags = RPC_TASK_ASYNC | RPC_TASK_MOVEABLE,
7c1d5fae
TM		 10390 };
10391 struct nfs_free_stateid_data *data;
2f261020 10392 struct rpc_task *task;
576acc25
SM		 10393 struct nfs_client *clp = server->nfs_client;
10394
10395 if (!refcount_inc_not_zero(&clp->cl_count))
10396 return -EIO;
9aeda35f 10397
3787d506
WAA		 10398 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
10399 &task_setup.rpc_client, &msg);
10400
38527b15 10401 dprintk("NFS call free_stateid %p\n", stateid);
da48f267 10402 data = kmalloc(sizeof(*data), GFP_KERNEL);
7c1d5fae 10403 if (!data)
2f261020 10404 return -ENOMEM;
7c1d5fae
TM		 10405 data->server = server;
10406 nfs4_stateid_copy(&data->args.stateid, stateid);
10407
10408 task_setup.callback_data = data;
10409
10410 msg.rpc_argp = &data->args;
10411 msg.rpc_resp = &data->res;
fba83f34 10412 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, privileged);
2f261020 10413 task = rpc_run_task(&task_setup);
7c1d5fae
TM		 10414 if (IS_ERR(task))
10415 return PTR_ERR(task);
7c1d5fae 10416 rpc_put_task(task);
f0b0bf88 10417 return 0;
9aeda35f 10418}
36281caa 10419
f1cdae87
JL		 10420static void
10421nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
c8b2d0bf 10422{
a52458b4 10423 const struct cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 10424
f0b0bf88 10425 nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf 10426 nfs4_free_lock_state(server, lsp);
c8b2d0bf
TM		 10427}
10428
36281caa
TM		 10429static bool nfs41_match_stateid(const nfs4_stateid *s1,
10430 const nfs4_stateid *s2)
10431{
93b717fd
TM		 10432 if (s1->type != s2->type)
10433 return false;
10434
2d2f24ad 10435 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 10436 return false;
10437
2d2f24ad 10438 if (s1->seqid == s2->seqid)
36281caa 10439 return true;
36281caa 10440
045c5519 10441 return s1->seqid == 0 || s2->seqid == 0;
36281caa
TM		 10442}
10443
557134a3
AA		 10444#endif /* CONFIG_NFS_V4_1 */
10445
36281caa
TM		 10446static bool nfs4_match_stateid(const nfs4_stateid *s1,
10447 const nfs4_stateid *s2)
10448{
f597c537 10449 return nfs4_stateid_match(s1, s2);
36281caa
TM		 10450}
10451
10452
17280175 10453static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 10454 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 10455 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 10456 .recover_open = nfs4_open_reclaim,
10457 .recover_lock = nfs4_lock_reclaim,
591d71cb 10458 .establish_clid = nfs4_init_clientid,
05f4c350 10459 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 10460};
10461
591d71cb 10462#if defined(CONFIG_NFS_V4_1)
17280175 10463static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 10464 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
10465 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
10466 .recover_open = nfs4_open_reclaim,
10467 .recover_lock = nfs4_lock_reclaim,
4d643d1d 10468 .establish_clid = nfs41_init_clientid,
fce5c838 10469 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 10470 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 10471};
10472#endif /* CONFIG_NFS_V4_1 */
10473
17280175 10474static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 10475 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
10476 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
4dfd4f7a 10477 .recover_open = nfs40_open_expired,
591d71cb
AA		 10478 .recover_lock = nfs4_lock_expired,
10479 .establish_clid = nfs4_init_clientid,
10480};
10481
10482#if defined(CONFIG_NFS_V4_1)
17280175 10483static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 10484 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 10485 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 10486 .recover_open = nfs41_open_expired,
10487 .recover_lock = nfs41_lock_expired,
4d643d1d 10488 .establish_clid = nfs41_init_clientid,
1da177e4 10489};
591d71cb 10490#endif /* CONFIG_NFS_V4_1 */
1da177e4 10491
17280175 10492static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 10493 .sched_state_renewal = nfs4_proc_async_renew,
f15e1e8b 10494 .get_state_renewal_cred = nfs4_get_renew_cred,
8e69514f 10495 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 10496};
10497
10498#if defined(CONFIG_NFS_V4_1)
17280175 10499static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 10500 .sched_state_renewal = nfs41_proc_async_sequence,
f15e1e8b 10501 .get_state_renewal_cred = nfs4_get_machine_cred,
8e69514f 10502 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 10503};
10504#endif
10505
ec011fe8 10506static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
b03d735b 10507 .get_locations = _nfs40_proc_get_locations,
44c99933 10508 .fsid_present = _nfs40_proc_fsid_present,
ec011fe8
CL		 10509};
10510
10511#if defined(CONFIG_NFS_V4_1)
10512static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
b03d735b 10513 .get_locations = _nfs41_proc_get_locations,
44c99933 10514 .fsid_present = _nfs41_proc_fsid_present,
ec011fe8
CL		 10515};
10516#endif /* CONFIG_NFS_V4_1 */
10517
97dc1359
TM		 10518static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
10519 .minor_version = 0,
39c6daae
TM		 10520 .init_caps = NFS_CAP_READDIRPLUS
10521 | NFS_CAP_ATOMIC_OPEN
39c6daae 10522 | NFS_CAP_POSIX_LOCK,
abf79bb3
CL		 10523 .init_client = nfs40_init_client,
10524 .shutdown_client = nfs40_shutdown_client,
36281caa 10525 .match_stateid = nfs4_match_stateid,
fca78d6d 10526 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 10527 .free_lock_state = nfs4_release_lockowner,
45870d69 10528 .test_and_free_expired = nfs40_test_and_free_expired_stateid,
63f5f796 10529 .alloc_seqid = nfs_alloc_seqid,
9915ea7e 10530 .call_sync_ops = &nfs40_call_sync_ops,
c48f4f35
TM		 10531 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
10532 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
10533 .state_renewal_ops = &nfs40_state_renewal_ops,
ec011fe8 10534 .mig_recovery_ops = &nfs40_mig_recovery_ops,
97dc1359
TM		 10535};
10536
10537#if defined(CONFIG_NFS_V4_1)
63f5f796
TM		 10538static struct nfs_seqid *
10539nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2)
10540{
10541 return NULL;
10542}
10543
97dc1359
TM		 10544static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
10545 .minor_version = 1,
39c6daae
TM		 10546 .init_caps = NFS_CAP_READDIRPLUS
10547 | NFS_CAP_ATOMIC_OPEN
3b66486c 10548 | NFS_CAP_POSIX_LOCK
49f9a0fa 10549 | NFS_CAP_STATEID_NFSV41
6e01260c 10550 | NFS_CAP_ATOMIC_OPEN_V1
118f09ed
OK		 10551 | NFS_CAP_LGOPEN
10552 | NFS_CAP_MOVEABLE,
abf79bb3
CL		 10553 .init_client = nfs41_init_client,
10554 .shutdown_client = nfs41_shutdown_client,
36281caa 10555 .match_stateid = nfs41_match_stateid,
fca78d6d 10556 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 10557 .free_lock_state = nfs41_free_lock_state,
45870d69 10558 .test_and_free_expired = nfs41_test_and_free_expired_stateid,
63f5f796 10559 .alloc_seqid = nfs_alloc_no_seqid,
04fa2c6b 10560 .session_trunk = nfs4_test_session_trunk,
9915ea7e 10561 .call_sync_ops = &nfs41_call_sync_ops,
c48f4f35
TM		 10562 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
10563 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
10564 .state_renewal_ops = &nfs41_state_renewal_ops,
ec011fe8 10565 .mig_recovery_ops = &nfs41_mig_recovery_ops,
97dc1359
TM		 10566};
10567#endif
10568
42c2c424
SD		 10569#if defined(CONFIG_NFS_V4_2)
10570static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
10571 .minor_version = 2,
7017310a
BS		 10572 .init_caps = NFS_CAP_READDIRPLUS
10573 | NFS_CAP_ATOMIC_OPEN
7017310a
BS		 10574 | NFS_CAP_POSIX_LOCK
10575 | NFS_CAP_STATEID_NFSV41
e983120e 10576 | NFS_CAP_ATOMIC_OPEN_V1
6e01260c 10577 | NFS_CAP_LGOPEN
f4ac1674 10578 | NFS_CAP_ALLOCATE
2e72448b 10579 | NFS_CAP_COPY
cb95deea 10580 | NFS_CAP_OFFLOAD_CANCEL
0491567b 10581 | NFS_CAP_COPY_NOTIFY
624bd5b7 10582 | NFS_CAP_DEALLOCATE
6c5a0d89 10583 | NFS_CAP_SEEK
e5341f3a 10584 | NFS_CAP_LAYOUTSTATS
3eb86093 10585 | NFS_CAP_CLONE
c5675526 10586 | NFS_CAP_LAYOUTERROR
118f09ed
OK		 10587 | NFS_CAP_READ_PLUS
10588 | NFS_CAP_MOVEABLE,
abf79bb3
CL		 10589 .init_client = nfs41_init_client,
10590 .shutdown_client = nfs41_shutdown_client,
42c2c424
SD		 10591 .match_stateid = nfs41_match_stateid,
10592 .find_root_sec = nfs41_find_root_sec,
7017310a 10593 .free_lock_state = nfs41_free_lock_state,
9915ea7e 10594 .call_sync_ops = &nfs41_call_sync_ops,
45870d69 10595 .test_and_free_expired = nfs41_test_and_free_expired_stateid,
63f5f796 10596 .alloc_seqid = nfs_alloc_no_seqid,
04fa2c6b 10597 .session_trunk = nfs4_test_session_trunk,
42c2c424
SD		 10598 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
10599 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
10600 .state_renewal_ops = &nfs41_state_renewal_ops,
18e3b739 10601 .mig_recovery_ops = &nfs41_mig_recovery_ops,
42c2c424
SD		 10602};
10603#endif
10604
97dc1359
TM		 10605const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
10606 [0] = &nfs_v4_0_minor_ops,
10607#if defined(CONFIG_NFS_V4_1)
10608 [1] = &nfs_v4_1_minor_ops,
10609#endif
42c2c424
SD		 10610#if defined(CONFIG_NFS_V4_2)
10611 [2] = &nfs_v4_2_minor_ops,
10612#endif
97dc1359
TM		 10613};
10614
13997823 10615static ssize_t nfs4_listxattr(struct dentry *dentry, char *list, size_t size)
c4803c49 10616{
012a211a 10617 ssize_t error, error2, error3;
251a658b 10618 size_t left = size;
c4803c49 10619
251a658b 10620 error = generic_listxattr(dentry, list, left);
c4803c49
AG		 10621 if (error < 0)
10622 return error;
10623 if (list) {
10624 list += error;
251a658b 10625 left -= error;
c4803c49
AG		 10626 }
10627
251a658b 10628 error2 = nfs4_listxattr_nfs4_label(d_inode(dentry), list, left);
c4803c49
AG		 10629 if (error2 < 0)
10630 return error2;
012a211a
FL		 10631
10632 if (list) {
10633 list += error2;
251a658b 10634 left -= error2;
012a211a
FL		 10635 }
10636
251a658b 10637 error3 = nfs4_listxattr_nfs4_user(d_inode(dentry), list, left);
012a211a
FL		 10638 if (error3 < 0)
10639 return error3;
10640
251a658b
JM		 10641 error += error2 + error3;
10642 if (size && error > size)
10643 return -ERANGE;
10644 return error;
c4803c49
AG		 10645}
10646
4dc73c67
N		 10647static void nfs4_enable_swap(struct inode *inode)
10648{
10649 /* The state manager thread must always be running.
10650 * It will notice the client is a swapper, and stay put.
10651 */
10652 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
10653
10654 nfs4_schedule_state_manager(clp);
10655}
10656
10657static void nfs4_disable_swap(struct inode *inode)
10658{
10659 /* The state manager thread will now exit once it is
10660 * woken.
10661 */
5bab56ff
N		 10662 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
10663
956fd46f
TM		 10664 set_bit(NFS4CLNT_RUN_MANAGER, &clp->cl_state);
10665 clear_bit(NFS4CLNT_MANAGER_AVAILABLE, &clp->cl_state);
10666 wake_up_var(&clp->cl_state);
4dc73c67
N		 10667}
10668
17f26b12 10669static const struct inode_operations nfs4_dir_inode_operations = {
73a79706
BS		 10670 .create = nfs_create,
10671 .lookup = nfs_lookup,
10672 .atomic_open = nfs_atomic_open,
10673 .link = nfs_link,
10674 .unlink = nfs_unlink,
10675 .symlink = nfs_symlink,
10676 .mkdir = nfs_mkdir,
10677 .rmdir = nfs_rmdir,
10678 .mknod = nfs_mknod,
10679 .rename = nfs_rename,
10680 .permission = nfs_permission,
10681 .getattr = nfs_getattr,
10682 .setattr = nfs_setattr,
c4803c49 10683 .listxattr = nfs4_listxattr,
73a79706
BS		 10684};
10685
92e1d5be 10686static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 10687 .permission = nfs_permission,
10688 .getattr = nfs_getattr,
10689 .setattr = nfs_setattr,
c4803c49 10690 .listxattr = nfs4_listxattr,
6b3b5496
BF		 10691};
10692
509de811 10693const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 10694 .version = 4, /* protocol version */
10695 .dentry_ops = &nfs4_dentry_operations,
10696 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 10697 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 10698 .file_ops = &nfs4_file_operations,
1da177e4 10699 .getroot = nfs4_proc_get_root,
281cad46 10700 .submount = nfs4_submount,
f2aedb71 10701 .try_get_tree = nfs4_try_get_tree,
1da177e4
LT		 10702 .getattr = nfs4_proc_getattr,
10703 .setattr = nfs4_proc_setattr,
10704 .lookup = nfs4_proc_lookup,
5b5faaf6 10705 .lookupp = nfs4_proc_lookupp,
1da177e4
LT		 10706 .access = nfs4_proc_access,
10707 .readlink = nfs4_proc_readlink,
1da177e4
LT		 10708 .create = nfs4_proc_create,
10709 .remove = nfs4_proc_remove,
10710 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 10711 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4 10712 .unlink_done = nfs4_proc_unlink_done,
d3d4152a 10713 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 10714 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 10715 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 10716 .link = nfs4_proc_link,
10717 .symlink = nfs4_proc_symlink,
10718 .mkdir = nfs4_proc_mkdir,
912678db 10719 .rmdir = nfs4_proc_rmdir,
1da177e4
LT		 10720 .readdir = nfs4_proc_readdir,
10721 .mknod = nfs4_proc_mknod,
10722 .statfs = nfs4_proc_statfs,
10723 .fsinfo = nfs4_proc_fsinfo,
10724 .pathconf = nfs4_proc_pathconf,
e9326dca 10725 .set_capabilities = nfs4_server_capabilities,
1da177e4 10726 .decode_dirent = nfs4_decode_dirent,
a4cdda59 10727 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
1da177e4 10728 .read_setup = nfs4_proc_read_setup,
ec06c096 10729 .read_done = nfs4_read_done,
1da177e4 10730 .write_setup = nfs4_proc_write_setup,
788e7a89 10731 .write_done = nfs4_write_done,
1da177e4 10732 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 10733 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 10734 .commit_done = nfs4_commit_done,
1da177e4 10735 .lock = nfs4_proc_lock,
e50a1c2e 10736 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 10737 .close_context = nfs4_close_context,
2b484297 10738 .open_context = nfs4_atomic_open,
011e2a7f 10739 .have_delegation = nfs4_have_delegation,
6663ee7f 10740 .alloc_client = nfs4_alloc_client,
45a52a02 10741 .init_client = nfs4_init_client,
cdb7eced 10742 .free_client = nfs4_free_client,
1179acc6
BS		 10743 .create_server = nfs4_create_server,
10744 .clone_server = nfs_clone_server,
1976b2b3 10745 .discover_trunking = nfs4_discover_trunking,
4dc73c67
N		 10746 .enable_swap = nfs4_enable_swap,
10747 .disable_swap = nfs4_disable_swap,
1da177e4
LT		 10748};
10749
64c2ce8b 10750static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
98e9cb57 10751 .name = XATTR_NAME_NFSV4_ACL,
64c2ce8b
AK		 10752 .list = nfs4_xattr_list_nfs4_acl,
10753 .get = nfs4_xattr_get_nfs4_acl,
10754 .set = nfs4_xattr_set_nfs4_acl,
10755};
10756
71342db0
TM		 10757#if defined(CONFIG_NFS_V4_1)
10758static const struct xattr_handler nfs4_xattr_nfs4_dacl_handler = {
10759 .name = XATTR_NAME_NFSV4_DACL,
10760 .list = nfs4_xattr_list_nfs4_dacl,
10761 .get = nfs4_xattr_get_nfs4_dacl,
10762 .set = nfs4_xattr_set_nfs4_dacl,
10763};
10764
10765static const struct xattr_handler nfs4_xattr_nfs4_sacl_handler = {
10766 .name = XATTR_NAME_NFSV4_SACL,
10767 .list = nfs4_xattr_list_nfs4_sacl,
10768 .get = nfs4_xattr_get_nfs4_sacl,
10769 .set = nfs4_xattr_set_nfs4_sacl,
10770};
10771#endif
10772
012a211a
FL		 10773#ifdef CONFIG_NFS_V4_2
10774static const struct xattr_handler nfs4_xattr_nfs4_user_handler = {
10775 .prefix = XATTR_USER_PREFIX,
10776 .get = nfs4_xattr_get_nfs4_user,
10777 .set = nfs4_xattr_set_nfs4_user,
10778};
10779#endif
10780
f496647e 10781const struct xattr_handler * const nfs4_xattr_handlers[] = {
64c2ce8b 10782 &nfs4_xattr_nfs4_acl_handler,
71342db0
TM		 10783#if defined(CONFIG_NFS_V4_1)
10784 &nfs4_xattr_nfs4_dacl_handler,
10785 &nfs4_xattr_nfs4_sacl_handler,
10786#endif
c9bccef6
DQ		 10787#ifdef CONFIG_NFS_V4_SECURITY_LABEL
10788 &nfs4_xattr_nfs4_label_handler,
012a211a
FL		 10789#endif
10790#ifdef CONFIG_NFS_V4_2
10791 &nfs4_xattr_nfs4_user_handler,
c9bccef6 10792#endif
64c2ce8b
AK		 10793 NULL
10794};
Linux 6.x block layer and io_uring tree(s)