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NFS/filelayout: Fix racy setting of fl->dsaddr in filelayout_check_deviceid()
[linux.git] / fs / nfs / nfs4proc.c
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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 <[email protected]>
10 * Andy Adamson <[email protected]>
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>
1da177e4 57
4ce79717 58#include "nfs4_fs.h"
1da177e4 59#include "delegation.h"
101070ca 60#include "internal.h"
006ea73e 61#include "iostat.h"
fc931582 62#include "callback.h"
b1f69b75 63#include "pnfs.h"
f092075d 64#include "netns.h"
40c64c26 65#include "nfs4idmap.h"
73e39aaa 66#include "nfs4session.h"
de242c0b 67#include "fscache.h"
1da177e4 68
c6d01c6f
TM		 69#include "nfs4trace.h"
70
1da177e4
LT		 71#define NFSDBG_FACILITY NFSDBG_PROC
72
2066fe89 73#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 74#define NFS4_POLL_RETRY_MAX (15*HZ)
75
a1d1c4f1
TM		 76/* file attributes which can be mapped to nfs attributes */
77#define NFS4_VALID_ATTRS (ATTR_MODE \
78 | ATTR_UID \
79 | ATTR_GID \
80 | ATTR_SIZE \
81 | ATTR_ATIME \
82 | ATTR_MTIME \
83 | ATTR_CTIME \
84 | ATTR_ATIME_SET \
85 | ATTR_MTIME_SET)
86
cdd4e68b 87struct nfs4_opendata;
864472e9 88static int _nfs4_proc_open(struct nfs4_opendata *data);
b257957e 89static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 90static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
81934ddb 91static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
1775fd3e
DQ		 92static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, struct nfs4_label *label);
93static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label);
0ab64e0e
TM		 94static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
95 struct nfs_fattr *fattr, struct iattr *sattr,
29b59f94 96 struct nfs_open_context *ctx, struct nfs4_label *ilabel,
1775fd3e 97 struct nfs4_label *olabel);
f062eb6c 98#ifdef CONFIG_NFS_V4_1
ab7cb0df
TM		 99static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *,
100 struct rpc_cred *);
f0b0bf88
TM		 101static int nfs41_free_stateid(struct nfs_server *, const nfs4_stateid *,
102 struct rpc_cred *, bool);
f062eb6c 103#endif
aa9c2669
DQ		 104
105#ifdef CONFIG_NFS_V4_SECURITY_LABEL
106static inline struct nfs4_label *
107nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
108 struct iattr *sattr, struct nfs4_label *label)
109{
110 int err;
111
112 if (label == NULL)
113 return NULL;
114
115 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0)
116 return NULL;
117
aa9c2669
DQ		 118 err = security_dentry_init_security(dentry, sattr->ia_mode,
119 &dentry->d_name, (void **)&label->label, &label->len);
120 if (err == 0)
121 return label;
122
123 return NULL;
124}
125static inline void
126nfs4_label_release_security(struct nfs4_label *label)
127{
128 if (label)
129 security_release_secctx(label->label, label->len);
130}
131static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
132{
133 if (label)
134 return server->attr_bitmask;
135
136 return server->attr_bitmask_nl;
137}
138#else
139static inline struct nfs4_label *
140nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
141 struct iattr *sattr, struct nfs4_label *l)
142{ return NULL; }
143static inline void
144nfs4_label_release_security(struct nfs4_label *label)
145{ return; }
146static inline u32 *
147nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
148{ return server->attr_bitmask; }
149#endif
150
1da177e4 151/* Prevent leaks of NFSv4 errors into userland */
46f72f57 152static int nfs4_map_errors(int err)
1da177e4 153{
52567b03
TM		 154 if (err >= -1000)
155 return err;
156 switch (err) {
157 case -NFS4ERR_RESOURCE:
30005121
WAA		 158 case -NFS4ERR_LAYOUTTRYLATER:
159 case -NFS4ERR_RECALLCONFLICT:
52567b03 160 return -EREMOTEIO;
7ebb9315 161 case -NFS4ERR_WRONGSEC:
8897538e 162 case -NFS4ERR_WRONG_CRED:
7ebb9315 163 return -EPERM;
3ddeb7c5
TM		 164 case -NFS4ERR_BADOWNER:
165 case -NFS4ERR_BADNAME:
166 return -EINVAL;
fb13bfa7
TM		 167 case -NFS4ERR_SHARE_DENIED:
168 return -EACCES;
f25efd85
SD		 169 case -NFS4ERR_MINOR_VERS_MISMATCH:
170 return -EPROTONOSUPPORT;
6e3cf241
TM		 171 case -NFS4ERR_FILE_OPEN:
172 return -EBUSY;
52567b03 173 default:
1da177e4 174 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 175 __func__, -err);
52567b03 176 break;
1da177e4 177 }
52567b03 178 return -EIO;
1da177e4
LT		 179}
180
181/*
182 * This is our standard bitmap for GETATTR requests.
183 */
1549210f 184const u32 nfs4_fattr_bitmap[3] = {
1da177e4
LT		 185 FATTR4_WORD0_TYPE
186 | FATTR4_WORD0_CHANGE
187 | FATTR4_WORD0_SIZE
188 | FATTR4_WORD0_FSID
189 | FATTR4_WORD0_FILEID,
190 FATTR4_WORD1_MODE
191 | FATTR4_WORD1_NUMLINKS
192 | FATTR4_WORD1_OWNER
193 | FATTR4_WORD1_OWNER_GROUP
194 | FATTR4_WORD1_RAWDEV
195 | FATTR4_WORD1_SPACE_USED
196 | FATTR4_WORD1_TIME_ACCESS
197 | FATTR4_WORD1_TIME_METADATA
ea96d1ec
AS		 198 | FATTR4_WORD1_TIME_MODIFY
199 | FATTR4_WORD1_MOUNTED_ON_FILEID,
aa9c2669
DQ		 200#ifdef CONFIG_NFS_V4_SECURITY_LABEL
201 FATTR4_WORD2_SECURITY_LABEL
202#endif
1da177e4
LT		 203};
204
1549210f
TM		 205static const u32 nfs4_pnfs_open_bitmap[3] = {
206 FATTR4_WORD0_TYPE
207 | FATTR4_WORD0_CHANGE
208 | FATTR4_WORD0_SIZE
209 | FATTR4_WORD0_FSID
210 | FATTR4_WORD0_FILEID,
211 FATTR4_WORD1_MODE
212 | FATTR4_WORD1_NUMLINKS
213 | FATTR4_WORD1_OWNER
214 | FATTR4_WORD1_OWNER_GROUP
215 | FATTR4_WORD1_RAWDEV
216 | FATTR4_WORD1_SPACE_USED
217 | FATTR4_WORD1_TIME_ACCESS
218 | FATTR4_WORD1_TIME_METADATA
219 | FATTR4_WORD1_TIME_MODIFY,
220 FATTR4_WORD2_MDSTHRESHOLD
95864c91
TM		 221#ifdef CONFIG_NFS_V4_SECURITY_LABEL
222 | FATTR4_WORD2_SECURITY_LABEL
223#endif
1549210f
TM		 224};
225
e23008ec
AA		 226static const u32 nfs4_open_noattr_bitmap[3] = {
227 FATTR4_WORD0_TYPE
e23008ec
AA		 228 | FATTR4_WORD0_FILEID,
229};
230
a09df2ca 231const u32 nfs4_statfs_bitmap[3] = {
1da177e4
LT		 232 FATTR4_WORD0_FILES_AVAIL
233 | FATTR4_WORD0_FILES_FREE
234 | FATTR4_WORD0_FILES_TOTAL,
235 FATTR4_WORD1_SPACE_AVAIL
236 | FATTR4_WORD1_SPACE_FREE
237 | FATTR4_WORD1_SPACE_TOTAL
238};
239
a09df2ca 240const u32 nfs4_pathconf_bitmap[3] = {
1da177e4
LT		 241 FATTR4_WORD0_MAXLINK
242 | FATTR4_WORD0_MAXNAME,
243 0
244};
245
dae100c2 246const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
1da177e4
LT		 247 | FATTR4_WORD0_MAXREAD
248 | FATTR4_WORD0_MAXWRITE
249 | FATTR4_WORD0_LEASE_TIME,
55b6e774 250 FATTR4_WORD1_TIME_DELTA
dae100c2
FI		 251 | FATTR4_WORD1_FS_LAYOUT_TYPES,
252 FATTR4_WORD2_LAYOUT_BLKSIZE
2a92ee92 253 | FATTR4_WORD2_CLONE_BLKSIZE
1da177e4
LT		 254};
255
a09df2ca 256const u32 nfs4_fs_locations_bitmap[3] = {
830b8e33
MN		 257 FATTR4_WORD0_TYPE
258 | FATTR4_WORD0_CHANGE
259 | FATTR4_WORD0_SIZE
260 | FATTR4_WORD0_FSID
261 | FATTR4_WORD0_FILEID
262 | FATTR4_WORD0_FS_LOCATIONS,
263 FATTR4_WORD1_MODE
264 | FATTR4_WORD1_NUMLINKS
265 | FATTR4_WORD1_OWNER
266 | FATTR4_WORD1_OWNER_GROUP
267 | FATTR4_WORD1_RAWDEV
268 | FATTR4_WORD1_SPACE_USED
269 | FATTR4_WORD1_TIME_ACCESS
270 | FATTR4_WORD1_TIME_METADATA
271 | FATTR4_WORD1_TIME_MODIFY
a09df2ca 272 | FATTR4_WORD1_MOUNTED_ON_FILEID,
830b8e33
MN		 273};
274
bc4785cd 275static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 276 struct nfs4_readdir_arg *readdir)
277{
18fe6a23 278 unsigned int attrs = FATTR4_WORD0_FILEID | FATTR4_WORD0_TYPE;
0dbb4c67 279 __be32 *start, *p;
1da177e4 280
1da177e4 281 if (cookie > 2) {
b7ef1956 282 readdir->cookie = cookie;
1da177e4
LT		 283 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
284 return;
285 }
286
287 readdir->cookie = 0;
288 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
289 if (cookie == 2)
290 return;
291
292 /*
293 * NFSv4 servers do not return entries for '.' and '..'
294 * Therefore, we fake these entries here. We let '.'
295 * have cookie 0 and '..' have cookie 1. Note that
296 * when talking to the server, we always send cookie 0
297 * instead of 1 or 2.
298 */
2b86ce2d 299 start = p = kmap_atomic(*readdir->pages);
1da177e4
LT		 300
301 if (cookie == 0) {
302 *p++ = xdr_one; /* next */
303 *p++ = xdr_zero; /* cookie, first word */
304 *p++ = xdr_one; /* cookie, second word */
305 *p++ = xdr_one; /* entry len */
306 memcpy(p, ".\0\0\0", 4); /* entry */
307 p++;
308 *p++ = xdr_one; /* bitmap length */
18fe6a23
AS		 309 *p++ = htonl(attrs); /* bitmap */
310 *p++ = htonl(12); /* attribute buffer length */
311 *p++ = htonl(NF4DIR);
2b0143b5 312 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry)));
1da177e4
LT		 313 }
314
315 *p++ = xdr_one; /* next */
316 *p++ = xdr_zero; /* cookie, first word */
317 *p++ = xdr_two; /* cookie, second word */
318 *p++ = xdr_two; /* entry len */
319 memcpy(p, "..\0\0", 4); /* entry */
320 p++;
321 *p++ = xdr_one; /* bitmap length */
18fe6a23
AS		 322 *p++ = htonl(attrs); /* bitmap */
323 *p++ = htonl(12); /* attribute buffer length */
324 *p++ = htonl(NF4DIR);
2b0143b5 325 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry->d_parent)));
1da177e4
LT		 326
327 readdir->pgbase = (char *)p - (char *)start;
328 readdir->count -= readdir->pgbase;
2b86ce2d 329 kunmap_atomic(start);
1da177e4
LT		 330}
331
26d36301
TM		 332static void nfs4_test_and_free_stateid(struct nfs_server *server,
333 nfs4_stateid *stateid,
334 struct rpc_cred *cred)
335{
336 const struct nfs4_minor_version_ops *ops = server->nfs_client->cl_mvops;
337
338 ops->test_and_free_expired(server, stateid, cred);
339}
340
341static void __nfs4_free_revoked_stateid(struct nfs_server *server,
342 nfs4_stateid *stateid,
343 struct rpc_cred *cred)
344{
345 stateid->type = NFS4_REVOKED_STATEID_TYPE;
346 nfs4_test_and_free_stateid(server, stateid, cred);
347}
348
349static void nfs4_free_revoked_stateid(struct nfs_server *server,
350 const nfs4_stateid *stateid,
351 struct rpc_cred *cred)
352{
353 nfs4_stateid tmp;
354
355 nfs4_stateid_copy(&tmp, stateid);
356 __nfs4_free_revoked_stateid(server, &tmp, cred);
357}
358
8478eaa1
N		 359static long nfs4_update_delay(long *timeout)
360{
361 long ret;
362 if (!timeout)
363 return NFS4_POLL_RETRY_MAX;
364 if (*timeout <= 0)
365 *timeout = NFS4_POLL_RETRY_MIN;
366 if (*timeout > NFS4_POLL_RETRY_MAX)
367 *timeout = NFS4_POLL_RETRY_MAX;
368 ret = *timeout;
369 *timeout <<= 1;
370 return ret;
371}
372
65de872e
TM		 373static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
374{
375 int res = 0;
376
377 might_sleep();
378
8478eaa1
N		 379 freezable_schedule_timeout_killable_unsafe(
380 nfs4_update_delay(timeout));
65de872e
TM		 381 if (fatal_signal_pending(current))
382 res = -ERESTARTSYS;
65de872e
TM		 383 return res;
384}
385
386/* This is the error handling routine for processes that are allowed
387 * to sleep.
388 */
b3c2aa07
TM		 389static int nfs4_do_handle_exception(struct nfs_server *server,
390 int errorcode, struct nfs4_exception *exception)
65de872e
TM		 391{
392 struct nfs_client *clp = server->nfs_client;
9e33bed5 393 struct nfs4_state *state = exception->state;
8487c479 394 const nfs4_stateid *stateid = exception->stateid;
3114ea7a 395 struct inode *inode = exception->inode;
65de872e
TM		 396 int ret = errorcode;
397
b3c2aa07
TM		 398 exception->delay = 0;
399 exception->recovering = 0;
65de872e 400 exception->retry = 0;
272289a3
TM		 401
402 if (stateid == NULL && state != NULL)
403 stateid = &state->stateid;
404
65de872e
TM		 405 switch(errorcode) {
406 case 0:
407 return 0;
5ba12443
TM		 408 case -NFS4ERR_DELEG_REVOKED:
409 case -NFS4ERR_ADMIN_REVOKED:
272289a3 410 case -NFS4ERR_EXPIRED:
5ba12443 411 case -NFS4ERR_BAD_STATEID:
272289a3
TM		 412 if (inode != NULL && stateid != NULL) {
413 nfs_inode_find_state_and_recover(inode,
414 stateid);
415 goto wait_on_recovery;
416 }
417 case -NFS4ERR_OPENMODE:
8487c479
TM		 418 if (inode) {
419 int err;
420
421 err = nfs_async_inode_return_delegation(inode,
422 stateid);
423 if (err == 0)
424 goto wait_on_recovery;
425 if (stateid != NULL && stateid->type == NFS4_DELEGATION_STATEID_TYPE) {
426 exception->retry = 1;
427 break;
428 }
429 }
3114ea7a
TM		 430 if (state == NULL)
431 break;
5d422301
TM		 432 ret = nfs4_schedule_stateid_recovery(server, state);
433 if (ret < 0)
434 break;
3114ea7a 435 goto wait_on_recovery;
65de872e 436 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 437 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 438 nfs4_schedule_lease_recovery(clp);
439 goto wait_on_recovery;
519ae255
CL		 440 case -NFS4ERR_MOVED:
441 ret = nfs4_schedule_migration_recovery(server);
442 if (ret < 0)
443 break;
444 goto wait_on_recovery;
8ef2f8d4
CL		 445 case -NFS4ERR_LEASE_MOVED:
446 nfs4_schedule_lease_moved_recovery(clp);
447 goto wait_on_recovery;
03391693 448#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 449 case -NFS4ERR_BADSESSION:
450 case -NFS4ERR_BADSLOT:
451 case -NFS4ERR_BAD_HIGH_SLOT:
452 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
453 case -NFS4ERR_DEADSESSION:
454 case -NFS4ERR_SEQ_FALSE_RETRY:
455 case -NFS4ERR_SEQ_MISORDERED:
456 dprintk("%s ERROR: %d Reset session\n", __func__,
457 errorcode);
9f594791 458 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
399f11c3 459 goto wait_on_recovery;
03391693 460#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 461 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 462 if (exception->timeout > HZ) {
463 /* We have retried a decent amount, time to
464 * fail
465 */
466 ret = -EBUSY;
467 break;
468 }
65de872e 469 case -NFS4ERR_DELAY:
2598ed34
TM		 470 nfs_inc_server_stats(server, NFSIOS_DELAY);
471 case -NFS4ERR_GRACE:
e85d7ee4 472 case -NFS4ERR_LAYOUTTRYLATER:
183d9e7b 473 case -NFS4ERR_RECALLCONFLICT:
b3c2aa07
TM		 474 exception->delay = 1;
475 return 0;
476
a8a4ae3a 477 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 478 case -NFS4ERR_OLD_STATEID:
479 exception->retry = 1;
b064eca2
TM		 480 break;
481 case -NFS4ERR_BADOWNER:
482 /* The following works around a Linux server bug! */
483 case -NFS4ERR_BADNAME:
484 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
485 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
486 exception->retry = 1;
487 printk(KERN_WARNING "NFS: v4 server %s "
488 "does not accept raw "
489 "uid/gids. "
490 "Reenabling the idmapper.\n",
491 server->nfs_client->cl_hostname);
492 }
65de872e
TM		 493 }
494 /* We failed to handle the error */
495 return nfs4_map_errors(ret);
0400a6b0 496wait_on_recovery:
b3c2aa07
TM		 497 exception->recovering = 1;
498 return 0;
499}
500
501/* This is the error handling routine for processes that are allowed
502 * to sleep.
503 */
504int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
505{
506 struct nfs_client *clp = server->nfs_client;
507 int ret;
508
509 ret = nfs4_do_handle_exception(server, errorcode, exception);
510 if (exception->delay) {
511 ret = nfs4_delay(server->client, &exception->timeout);
512 goto out_retry;
513 }
514 if (exception->recovering) {
515 ret = nfs4_wait_clnt_recover(clp);
516 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
517 return -EIO;
518 goto out_retry;
519 }
520 return ret;
521out_retry:
a2c0b9e2
TM		 522 if (ret == 0)
523 exception->retry = 1;
524 return ret;
65de872e
TM		 525}
526
037fc980
TM		 527static int
528nfs4_async_handle_exception(struct rpc_task *task, struct nfs_server *server,
529 int errorcode, struct nfs4_exception *exception)
530{
531 struct nfs_client *clp = server->nfs_client;
532 int ret;
533
534 ret = nfs4_do_handle_exception(server, errorcode, exception);
535 if (exception->delay) {
536 rpc_delay(task, nfs4_update_delay(&exception->timeout));
537 goto out_retry;
538 }
539 if (exception->recovering) {
540 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
541 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
542 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
543 goto out_retry;
544 }
519ae255 545 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
037fc980
TM		 546 ret = -EIO;
547 return ret;
548out_retry:
a2c0b9e2
TM		 549 if (ret == 0)
550 exception->retry = 1;
551 return ret;
65de872e
TM		 552}
553
037fc980
TM		 554static int
555nfs4_async_handle_error(struct rpc_task *task, struct nfs_server *server,
556 struct nfs4_state *state, long *timeout)
557{
558 struct nfs4_exception exception = {
559 .state = state,
560 };
561
562 if (task->tk_status >= 0)
563 return 0;
564 if (timeout)
565 exception.timeout = *timeout;
566 task->tk_status = nfs4_async_handle_exception(task, server,
567 task->tk_status,
568 &exception);
569 if (exception.delay && timeout)
570 *timeout = exception.timeout;
571 if (exception.retry)
572 return -EAGAIN;
573 return 0;
574}
575
a5250def
WAA		 576/*
577 * Return 'true' if 'clp' is using an rpc_client that is integrity protected
578 * or 'false' otherwise.
579 */
580static bool _nfs4_is_integrity_protected(struct nfs_client *clp)
581{
582 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor;
eeea5361 583 return (flavor == RPC_AUTH_GSS_KRB5I) || (flavor == RPC_AUTH_GSS_KRB5P);
a5250def 584}
65de872e 585
452e9352 586static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 587{
1da177e4
LT		 588 spin_lock(&clp->cl_lock);
589 if (time_before(clp->cl_last_renewal,timestamp))
590 clp->cl_last_renewal = timestamp;
591 spin_unlock(&clp->cl_lock);
592}
593
452e9352
TM		 594static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
595{
be824167
TM		 596 struct nfs_client *clp = server->nfs_client;
597
598 if (!nfs4_has_session(clp))
599 do_renew_lease(clp, timestamp);
452e9352
TM		 600}
601
2a3eb2b9
CL		 602struct nfs4_call_sync_data {
603 const struct nfs_server *seq_server;
604 struct nfs4_sequence_args *seq_args;
605 struct nfs4_sequence_res *seq_res;
606};
607
be3a5d23
TM		 608void nfs4_init_sequence(struct nfs4_sequence_args *args,
609 struct nfs4_sequence_res *res, int cache_reply)
a9c92d6b
CL		 610{
611 args->sa_slot = NULL;
612 args->sa_cache_this = cache_reply;
613 args->sa_privileged = 0;
614
615 res->sr_slot = NULL;
616}
617
618static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
619{
620 args->sa_privileged = 1;
621}
622
2e80dbe7 623static void nfs40_sequence_free_slot(struct nfs4_sequence_res *res)
3bd2384a
CL		 624{
625 struct nfs4_slot *slot = res->sr_slot;
626 struct nfs4_slot_table *tbl;
627
3bd2384a
CL		 628 tbl = slot->table;
629 spin_lock(&tbl->slot_tbl_lock);
630 if (!nfs41_wake_and_assign_slot(tbl, slot))
631 nfs4_free_slot(tbl, slot);
632 spin_unlock(&tbl->slot_tbl_lock);
633
634 res->sr_slot = NULL;
2e80dbe7
TM		 635}
636
637static int nfs40_sequence_done(struct rpc_task *task,
638 struct nfs4_sequence_res *res)
639{
640 if (res->sr_slot != NULL)
641 nfs40_sequence_free_slot(res);
3bd2384a
CL		 642 return 1;
643}
644
cccef3b9
AA		 645#if defined(CONFIG_NFS_V4_1)
646
d185a334 647static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871 648{
e3725ec0 649 struct nfs4_session *session;
13615871 650 struct nfs4_slot_table *tbl;
a13ce7c6 651 struct nfs4_slot *slot = res->sr_slot;
c10e4498 652 bool send_new_highest_used_slotid = false;
13615871 653
a13ce7c6 654 tbl = slot->table;
e3725ec0 655 session = tbl->session;
ea028ac9 656
07e8dcbd
TM		 657 /* Bump the slot sequence number */
658 if (slot->seq_done)
659 slot->seq_nr++;
660 slot->seq_done = 0;
661
35dc1d74 662 spin_lock(&tbl->slot_tbl_lock);
c10e4498
TM		 663 /* Be nice to the server: try to ensure that the last transmitted
664 * value for highest_user_slotid <= target_highest_slotid
665 */
666 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
667 send_new_highest_used_slotid = true;
668
a13ce7c6 669 if (nfs41_wake_and_assign_slot(tbl, slot)) {
b75ad4cd
TM		 670 send_new_highest_used_slotid = false;
671 goto out_unlock;
672 }
a13ce7c6 673 nfs4_free_slot(tbl, slot);
c10e4498
TM		 674
675 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
676 send_new_highest_used_slotid = false;
b75ad4cd 677out_unlock:
35dc1d74 678 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 679 res->sr_slot = NULL;
c10e4498 680 if (send_new_highest_used_slotid)
3f10a6af 681 nfs41_notify_server(session->clp);
045d2a6d
TM		 682 if (waitqueue_active(&tbl->slot_waitq))
683 wake_up_all(&tbl->slot_waitq);
13615871
AA		 684}
685
2e80dbe7
TM		 686static int nfs41_sequence_process(struct rpc_task *task,
687 struct nfs4_sequence_res *res)
b0df806c 688{
e3725ec0 689 struct nfs4_session *session;
a13ce7c6 690 struct nfs4_slot *slot = res->sr_slot;
14516c3a 691 struct nfs_client *clp;
ac20d163 692 bool interrupted = false;
85563073 693 int ret = 1;
b0df806c 694
a13ce7c6
TM		 695 if (slot == NULL)
696 goto out_noaction;
468f8613
BS		 697 /* don't increment the sequence number if the task wasn't sent */
698 if (!RPC_WAS_SENT(task))
b0df806c
AA		 699 goto out;
700
e3725ec0 701 session = slot->table->session;
933602e3 702
ac20d163 703 if (slot->interrupted) {
88bd4f86
OK		 704 if (res->sr_status != -NFS4ERR_DELAY)
705 slot->interrupted = 0;
ac20d163
TM		 706 interrupted = true;
707 }
708
2f92ae34 709 trace_nfs4_sequence_done(session, res);
691daf3b 710 /* Check the SEQUENCE operation status */
14516c3a
TM		 711 switch (res->sr_status) {
712 case 0:
a865880e
OK		 713 /* If previous op on slot was interrupted and we reused
714 * the seq# and got a reply from the cache, then retry
715 */
716 if (task->tk_status == -EREMOTEIO && interrupted) {
717 ++slot->seq_nr;
718 goto retry_nowait;
719 }
b0df806c 720 /* Update the slot's sequence and clientid lease timer */
07e8dcbd 721 slot->seq_done = 1;
e3725ec0 722 clp = session->clp;
8e63b6a8 723 do_renew_lease(clp, res->sr_timestamp);
0629e370 724 /* Check sequence flags */
0a014a44
TM		 725 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags,
726 !!slot->privileged);
464ee9f9 727 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a 728 break;
ac20d163
TM		 729 case 1:
730 /*
731 * sr_status remains 1 if an RPC level error occurred.
732 * The server may or may not have processed the sequence
733 * operation..
734 * Mark the slot as having hosted an interrupted RPC call.
735 */
736 slot->interrupted = 1;
737 goto out;
14516c3a
TM		 738 case -NFS4ERR_DELAY:
739 /* The server detected a resend of the RPC call and
740 * returned NFS4ERR_DELAY as per Section 2.10.6.2
741 * of RFC5661.
742 */
df2fabff 743 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 744 __func__,
df2fabff 745 slot->slot_nr,
933602e3 746 slot->seq_nr);
14516c3a 747 goto out_retry;
85563073
TM		 748 case -NFS4ERR_BADSLOT:
749 /*
750 * The slot id we used was probably retired. Try again
751 * using a different slot id.
752 */
e8794440
TM		 753 goto retry_nowait;
754 case -NFS4ERR_SEQ_MISORDERED:
ac20d163
TM		 755 /*
756 * Was the last operation on this sequence interrupted?
757 * If so, retry after bumping the sequence number.
758 */
759 if (interrupted) {
760 ++slot->seq_nr;
761 goto retry_nowait;
762 }
e8794440
TM		 763 /*
764 * Could this slot have been previously retired?
765 * If so, then the server may be expecting seq_nr = 1!
766 */
8e63b6a8
TM		 767 if (slot->seq_nr != 1) {
768 slot->seq_nr = 1;
769 goto retry_nowait;
770 }
771 break;
e8794440
TM		 772 case -NFS4ERR_SEQ_FALSE_RETRY:
773 ++slot->seq_nr;
774 goto retry_nowait;
14516c3a
TM		 775 default:
776 /* Just update the slot sequence no. */
07e8dcbd 777 slot->seq_done = 1;
b0df806c
AA		 778 }
779out:
780 /* The session may be reset by one of the error handlers. */
781 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
a13ce7c6 782out_noaction:
85563073 783 return ret;
e8794440
TM		 784retry_nowait:
785 if (rpc_restart_call_prepare(task)) {
2e80dbe7 786 nfs41_sequence_free_slot(res);
e8794440
TM		 787 task->tk_status = 0;
788 ret = 0;
789 }
790 goto out;
14516c3a 791out_retry:
d05dd4e9 792 if (!rpc_restart_call(task))
14516c3a
TM		 793 goto out;
794 rpc_delay(task, NFS4_POLL_RETRY_MAX);
795 return 0;
b0df806c 796}
2e80dbe7
TM		 797
798int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
799{
800 if (!nfs41_sequence_process(task, res))
801 return 0;
802 if (res->sr_slot != NULL)
803 nfs41_sequence_free_slot(res);
804 return 1;
805
806}
f9c96fcc 807EXPORT_SYMBOL_GPL(nfs41_sequence_done);
b0df806c 808
2e80dbe7
TM		 809static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res)
810{
811 if (res->sr_slot == NULL)
812 return 1;
813 if (res->sr_slot->table->session != NULL)
814 return nfs41_sequence_process(task, res);
815 return nfs40_sequence_done(task, res);
816}
817
818static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res)
819{
820 if (res->sr_slot != NULL) {
821 if (res->sr_slot->table->session != NULL)
822 nfs41_sequence_free_slot(res);
823 else
824 nfs40_sequence_free_slot(res);
825 }
826}
827
2c4b131d 828int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
df896455 829{
e3725ec0 830 if (res->sr_slot == NULL)
14516c3a 831 return 1;
3bd2384a
CL		 832 if (!res->sr_slot->table->session)
833 return nfs40_sequence_done(task, res);
14516c3a 834 return nfs41_sequence_done(task, res);
df896455 835}
2c4b131d 836EXPORT_SYMBOL_GPL(nfs4_sequence_done);
df896455 837
ce5039c1
AA		 838static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
839{
2a3eb2b9 840 struct nfs4_call_sync_data *data = calldata;
ce5039c1 841
035168ab
TM		 842 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
843
7981c8a6
AS		 844 nfs4_setup_sequence(data->seq_server->nfs_client,
845 data->seq_args, data->seq_res, task);
ce5039c1
AA		 846}
847
69ab40c4
AA		 848static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
849{
2a3eb2b9 850 struct nfs4_call_sync_data *data = calldata;
69ab40c4 851
14516c3a 852 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 853}
854
17280175 855static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 856 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 857 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 858};
859
3bd2384a
CL		 860#else /* !CONFIG_NFS_V4_1 */
861
2e80dbe7
TM		 862static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res)
863{
864 return nfs40_sequence_done(task, res);
865}
866
867static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res)
868{
869 if (res->sr_slot != NULL)
870 nfs40_sequence_free_slot(res);
871}
872
2c4b131d
PT		 873int nfs4_sequence_done(struct rpc_task *task,
874 struct nfs4_sequence_res *res)
9915ea7e 875{
3bd2384a 876 return nfs40_sequence_done(task, res);
9915ea7e 877}
2c4b131d 878EXPORT_SYMBOL_GPL(nfs4_sequence_done);
3bd2384a
CL		 879
880#endif /* !CONFIG_NFS_V4_1 */
9915ea7e 881
7981c8a6
AS		 882int nfs4_setup_sequence(const struct nfs_client *client,
883 struct nfs4_sequence_args *args,
884 struct nfs4_sequence_res *res,
885 struct rpc_task *task)
886{
7981c8a6 887 struct nfs4_session *session = nfs4_get_session(client);
76ee0354 888 struct nfs4_slot_table *tbl = client->cl_slot_tbl;
3d35808b 889 struct nfs4_slot *slot;
7981c8a6 890
9dd9107f
AS		 891 /* slot already allocated? */
892 if (res->sr_slot != NULL)
893 goto out_start;
894
76ee0354
AS		 895 if (session) {
896 tbl = &session->fc_slot_table;
897 task->tk_timeout = 0;
898 }
899
6994cdd7 900 spin_lock(&tbl->slot_tbl_lock);
76ee0354
AS		 901 /* The state manager will wait until the slot table is empty */
902 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
903 goto out_sleep;
6994cdd7 904
3d35808b
AS		 905 slot = nfs4_alloc_slot(tbl);
906 if (IS_ERR(slot)) {
907 /* Try again in 1/4 second */
908 if (slot == ERR_PTR(-ENOMEM))
909 task->tk_timeout = HZ >> 2;
0dcee8bb 910 goto out_sleep;
3d35808b 911 }
6994cdd7 912 spin_unlock(&tbl->slot_tbl_lock);
7981c8a6 913
3d35808b
AS		 914 slot->privileged = args->sa_privileged ? 1 : 0;
915 args->sa_slot = slot;
916
917 res->sr_slot = slot;
918 if (session) {
919 res->sr_timestamp = jiffies;
920 res->sr_status_flags = 0;
921 res->sr_status = 1;
3d35808b
AS		 922 }
923
ad05cc0f 924 trace_nfs4_setup_sequence(session, args);
9dd9107f
AS		 925out_start:
926 rpc_call_start(task);
927 return 0;
0dcee8bb
AS		 928
929out_sleep:
930 if (args->sa_privileged)
931 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
932 NULL, RPC_PRIORITY_PRIVILEGED);
933 else
934 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
935 spin_unlock(&tbl->slot_tbl_lock);
936 return -EAGAIN;
7981c8a6
AS		 937}
938EXPORT_SYMBOL_GPL(nfs4_setup_sequence);
939
9915ea7e
CL		 940static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
941{
942 struct nfs4_call_sync_data *data = calldata;
42e1cca7 943 nfs4_setup_sequence(data->seq_server->nfs_client,
9915ea7e
CL		 944 data->seq_args, data->seq_res, task);
945}
946
947static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
948{
949 struct nfs4_call_sync_data *data = calldata;
950 nfs4_sequence_done(task, data->seq_res);
951}
952
953static const struct rpc_call_ops nfs40_call_sync_ops = {
954 .rpc_call_prepare = nfs40_call_sync_prepare,
955 .rpc_call_done = nfs40_call_sync_done,
956};
957
7c513058
BS		 958static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
959 struct nfs_server *server,
ce5039c1
AA		 960 struct rpc_message *msg,
961 struct nfs4_sequence_args *args,
8fe72bac 962 struct nfs4_sequence_res *res)
ce5039c1
AA		 963{
964 int ret;
965 struct rpc_task *task;
9915ea7e 966 struct nfs_client *clp = server->nfs_client;
2a3eb2b9 967 struct nfs4_call_sync_data data = {
035168ab 968 .seq_server = server,
ce5039c1
AA		 969 .seq_args = args,
970 .seq_res = res,
ce5039c1
AA		 971 };
972 struct rpc_task_setup task_setup = {
7c513058 973 .rpc_client = clnt,
ce5039c1 974 .rpc_message = msg,
9915ea7e 975 .callback_ops = clp->cl_mvops->call_sync_ops,
ce5039c1
AA		 976 .callback_data = &data
977 };
978
ce5039c1
AA		 979 task = rpc_run_task(&task_setup);
980 if (IS_ERR(task))
981 ret = PTR_ERR(task);
982 else {
983 ret = task->tk_status;
984 rpc_put_task(task);
985 }
986 return ret;
987}
988
7c513058
BS		 989int nfs4_call_sync(struct rpc_clnt *clnt,
990 struct nfs_server *server,
e73b83f2
BS		 991 struct rpc_message *msg,
992 struct nfs4_sequence_args *args,
993 struct nfs4_sequence_res *res,
994 int cache_reply)
995{
a9c92d6b 996 nfs4_init_sequence(args, res, cache_reply);
9915ea7e 997 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
e73b83f2 998}
cccef3b9 999
d3129ef6
TM		 1000static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo,
1001 unsigned long timestamp)
1da177e4 1002{
38478b24 1003 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 1004
38478b24 1005 spin_lock(&dir->i_lock);
359d7d1c 1006 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
e603a4c1
TM		 1007 if (cinfo->atomic && cinfo->before == dir->i_version) {
1008 nfsi->cache_validity &= ~NFS_INO_REVAL_PAGECACHE;
1009 nfsi->attrtimeo_timestamp = jiffies;
1010 } else {
bfc69a45 1011 nfs_force_lookup_revalidate(dir);
e603a4c1
TM		 1012 if (cinfo->before != dir->i_version)
1013 nfsi->cache_validity |= NFS_INO_INVALID_ACCESS |
1014 NFS_INO_INVALID_ACL;
1015 }
a9a4a87a 1016 dir->i_version = cinfo->after;
d3129ef6 1017 nfsi->read_cache_jiffies = timestamp;
3235b403 1018 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
de242c0b 1019 nfs_fscache_invalidate(dir);
38478b24 1020 spin_unlock(&dir->i_lock);
1da177e4
LT		 1021}
1022
e56e0b78 1023struct nfs4_opendata {
c6d00e63 1024 struct kref kref;
e56e0b78
TM		 1025 struct nfs_openargs o_arg;
1026 struct nfs_openres o_res;
cdd4e68b
TM		 1027 struct nfs_open_confirmargs c_arg;
1028 struct nfs_open_confirmres c_res;
6926afd1
TM		 1029 struct nfs4_string owner_name;
1030 struct nfs4_string group_name;
a49c2691 1031 struct nfs4_label *a_label;
e56e0b78 1032 struct nfs_fattr f_attr;
1775fd3e 1033 struct nfs4_label *f_label;
e56e0b78 1034 struct dentry *dir;
82a2c1b7 1035 struct dentry *dentry;
e56e0b78 1036 struct nfs4_state_owner *owner;
aac00a8d 1037 struct nfs4_state *state;
e56e0b78 1038 struct iattr attrs;
26e976a8 1039 unsigned long timestamp;
a7a3b1e9
BC		 1040 bool rpc_done;
1041 bool file_created;
1042 bool is_recover;
1043 bool cancelled;
24ac23ab 1044 int rpc_status;
e56e0b78
TM		 1045};
1046
49f9a0fa
TM		 1047static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
1048 int err, struct nfs4_exception *exception)
1049{
1050 if (err != -EINVAL)
1051 return false;
1052 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1053 return false;
1054 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
1055 exception->retry = 1;
1056 return true;
1057}
1058
6ae37339
TM		 1059static u32
1060nfs4_map_atomic_open_share(struct nfs_server *server,
1061 fmode_t fmode, int openflags)
1062{
1063 u32 res = 0;
1064
1065 switch (fmode & (FMODE_READ | FMODE_WRITE)) {
1066 case FMODE_READ:
1067 res = NFS4_SHARE_ACCESS_READ;
1068 break;
1069 case FMODE_WRITE:
1070 res = NFS4_SHARE_ACCESS_WRITE;
1071 break;
1072 case FMODE_READ|FMODE_WRITE:
1073 res = NFS4_SHARE_ACCESS_BOTH;
1074 }
1075 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1076 goto out;
1077 /* Want no delegation if we're using O_DIRECT */
1078 if (openflags & O_DIRECT)
1079 res |= NFS4_SHARE_WANT_NO_DELEG;
1080out:
1081 return res;
1082}
1083
49f9a0fa
TM		 1084static enum open_claim_type4
1085nfs4_map_atomic_open_claim(struct nfs_server *server,
1086 enum open_claim_type4 claim)
1087{
1088 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
1089 return claim;
1090 switch (claim) {
1091 default:
1092 return claim;
1093 case NFS4_OPEN_CLAIM_FH:
1094 return NFS4_OPEN_CLAIM_NULL;
1095 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1096 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
1097 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1098 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
1099 }
1100}
2ced46c2
TM		 1101
1102static void nfs4_init_opendata_res(struct nfs4_opendata *p)
1103{
1104 p->o_res.f_attr = &p->f_attr;
1775fd3e 1105 p->o_res.f_label = p->f_label;
c1d51931
TM		 1106 p->o_res.seqid = p->o_arg.seqid;
1107 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 1108 p->o_res.server = p->o_arg.server;
5f657530 1109 p->o_res.access_request = p->o_arg.access;
2ced46c2 1110 nfs_fattr_init(&p->f_attr);
6926afd1 1111 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 1112}
1113
82a2c1b7 1114static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 1115 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be 1116 const struct iattr *attrs,
1775fd3e 1117 struct nfs4_label *label,
4a1c0893 1118 enum open_claim_type4 claim,
8535b2be 1119 gfp_t gfp_mask)
e56e0b78 1120{
82a2c1b7 1121 struct dentry *parent = dget_parent(dentry);
2b0143b5 1122 struct inode *dir = d_inode(parent);
e56e0b78 1123 struct nfs_server *server = NFS_SERVER(dir);
63f5f796 1124 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
e56e0b78
TM		 1125 struct nfs4_opendata *p;
1126
8535b2be 1127 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 1128 if (p == NULL)
1129 goto err;
14c43f76
DQ		 1130
1131 p->f_label = nfs4_label_alloc(server, gfp_mask);
1132 if (IS_ERR(p->f_label))
1133 goto err_free_p;
1134
a49c2691
KM		 1135 p->a_label = nfs4_label_alloc(server, gfp_mask);
1136 if (IS_ERR(p->a_label))
1137 goto err_free_f;
1138
63f5f796
TM		 1139 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
1140 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask);
badc76dd 1141 if (IS_ERR(p->o_arg.seqid))
14c43f76 1142 goto err_free_label;
82a2c1b7
AV		 1143 nfs_sb_active(dentry->d_sb);
1144 p->dentry = dget(dentry);
e56e0b78
TM		 1145 p->dir = parent;
1146 p->owner = sp;
1147 atomic_inc(&sp->so_count);
dc0b027d
TM		 1148 p->o_arg.open_flags = flags;
1149 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
dff25ddb 1150 p->o_arg.umask = current_umask();
536585cc 1151 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
6ae37339
TM		 1152 p->o_arg.share_access = nfs4_map_atomic_open_share(server,
1153 fmode, flags);
ae2bb032
WAA		 1154 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
1155 * will return permission denied for all bits until close */
1156 if (!(flags & O_EXCL)) {
1157 /* ask server to check for all possible rights as results
1158 * are cached */
536585cc
TM		 1159 switch (p->o_arg.claim) {
1160 default:
1161 break;
1162 case NFS4_OPEN_CLAIM_NULL:
1163 case NFS4_OPEN_CLAIM_FH:
1164 p->o_arg.access = NFS4_ACCESS_READ |
1165 NFS4_ACCESS_MODIFY |
1166 NFS4_ACCESS_EXTEND |
1167 NFS4_ACCESS_EXECUTE;
1168 }
ae2bb032 1169 }
7539bbab 1170 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 1171 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1172 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 1173 p->o_arg.name = &dentry->d_name;
e56e0b78 1174 p->o_arg.server = server;
aa9c2669 1175 p->o_arg.bitmask = nfs4_bitmask(server, label);
1549210f 1176 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
a49c2691 1177 p->o_arg.label = nfs4_label_copy(p->a_label, label);
49f9a0fa 1178 switch (p->o_arg.claim) {
4a1c0893
TM		 1179 case NFS4_OPEN_CLAIM_NULL:
1180 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1181 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1182 p->o_arg.fh = NFS_FH(dir);
1183 break;
1184 case NFS4_OPEN_CLAIM_PREVIOUS:
1185 case NFS4_OPEN_CLAIM_FH:
1186 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1187 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
2b0143b5 1188 p->o_arg.fh = NFS_FH(d_inode(dentry));
4a1c0893 1189 }
536e43d1 1190 if (attrs != NULL && attrs->ia_valid != 0) {
c281fa9c 1191 __u32 verf[2];
d77d76ff 1192
e56e0b78
TM		 1193 p->o_arg.u.attrs = &p->attrs;
1194 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 1195
1196 verf[0] = jiffies;
1197 verf[1] = current->pid;
1198 memcpy(p->o_arg.u.verifier.data, verf,
1199 sizeof(p->o_arg.u.verifier.data));
e56e0b78 1200 }
cdd4e68b
TM		 1201 p->c_arg.fh = &p->o_res.fh;
1202 p->c_arg.stateid = &p->o_res.stateid;
1203 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 1204 nfs4_init_opendata_res(p);
c6d00e63 1205 kref_init(&p->kref);
e56e0b78 1206 return p;
14c43f76
DQ		 1207
1208err_free_label:
a49c2691
KM		 1209 nfs4_label_free(p->a_label);
1210err_free_f:
14c43f76
DQ		 1211 nfs4_label_free(p->f_label);
1212err_free_p:
e56e0b78
TM		 1213 kfree(p);
1214err:
1215 dput(parent);
1216 return NULL;
1217}
1218
c6d00e63 1219static void nfs4_opendata_free(struct kref *kref)
e56e0b78 1220{
c6d00e63
TM		 1221 struct nfs4_opendata *p = container_of(kref,
1222 struct nfs4_opendata, kref);
82a2c1b7 1223 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 1224
1225 nfs_free_seqid(p->o_arg.seqid);
2e80dbe7 1226 nfs4_sequence_free_slot(&p->o_res.seq_res);
aac00a8d
TM		 1227 if (p->state != NULL)
1228 nfs4_put_open_state(p->state);
c6d00e63 1229 nfs4_put_state_owner(p->owner);
14c43f76 1230
a49c2691 1231 nfs4_label_free(p->a_label);
14c43f76
DQ		 1232 nfs4_label_free(p->f_label);
1233
c6d00e63 1234 dput(p->dir);
82a2c1b7
AV		 1235 dput(p->dentry);
1236 nfs_sb_deactive(sb);
6926afd1 1237 nfs_fattr_free_names(&p->f_attr);
e911b815 1238 kfree(p->f_attr.mdsthreshold);
c6d00e63
TM		 1239 kfree(p);
1240}
1241
1242static void nfs4_opendata_put(struct nfs4_opendata *p)
1243{
1244 if (p != NULL)
1245 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 1246}
1247
24311f88
TM		 1248static bool nfs4_mode_match_open_stateid(struct nfs4_state *state,
1249 fmode_t fmode)
1250{
1251 switch(fmode & (FMODE_READ|FMODE_WRITE)) {
1252 case FMODE_READ|FMODE_WRITE:
1253 return state->n_rdwr != 0;
1254 case FMODE_WRITE:
1255 return state->n_wronly != 0;
1256 case FMODE_READ:
1257 return state->n_rdonly != 0;
1258 }
1259 WARN_ON_ONCE(1);
1260 return false;
1261}
1262
dc0b027d 1263static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 1264{
1265 int ret = 0;
dc0b027d 1266
536e43d1 1267 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 1268 goto out;
1269 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 1270 case FMODE_READ:
88069f77
TM		 1271 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1272 && state->n_rdonly != 0;
6ee41268
TM		 1273 break;
1274 case FMODE_WRITE:
88069f77
TM		 1275 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1276 && state->n_wronly != 0;
6ee41268
TM		 1277 break;
1278 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 1279 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1280 && state->n_rdwr != 0;
6ee41268 1281 }
dc0b027d 1282out:
6ee41268
TM		 1283 return ret;
1284}
1285
2a606188
TM		 1286static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode,
1287 enum open_claim_type4 claim)
aac00a8d 1288{
652f89f6
TM		 1289 if (delegation == NULL)
1290 return 0;
dc0b027d 1291 if ((delegation->type & fmode) != fmode)
aac00a8d 1292 return 0;
d25be546
TM		 1293 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1294 return 0;
2a606188
TM		 1295 switch (claim) {
1296 case NFS4_OPEN_CLAIM_NULL:
1297 case NFS4_OPEN_CLAIM_FH:
1298 break;
1299 case NFS4_OPEN_CLAIM_PREVIOUS:
1300 if (!test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
1301 break;
1302 default:
1303 return 0;
1304 }
b7391f44 1305 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 1306 return 1;
1307}
1308
dc0b027d 1309static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 1310{
dc0b027d 1311 switch (fmode) {
e7616923
TM		 1312 case FMODE_WRITE:
1313 state->n_wronly++;
1314 break;
1315 case FMODE_READ:
1316 state->n_rdonly++;
1317 break;
1318 case FMODE_READ|FMODE_WRITE:
1319 state->n_rdwr++;
1320 }
dc0b027d 1321 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 1322}
1323
8a64c4ef
TM		 1324#ifdef CONFIG_NFS_V4_1
1325static bool nfs_open_stateid_recover_openmode(struct nfs4_state *state)
1326{
1327 if (state->n_rdonly && !test_bit(NFS_O_RDONLY_STATE, &state->flags))
1328 return true;
1329 if (state->n_wronly && !test_bit(NFS_O_WRONLY_STATE, &state->flags))
1330 return true;
1331 if (state->n_rdwr && !test_bit(NFS_O_RDWR_STATE, &state->flags))
1332 return true;
1333 return false;
1334}
1335#endif /* CONFIG_NFS_V4_1 */
1336
4f14c194
TM		 1337static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
1338{
1339 struct nfs_client *clp = state->owner->so_server->nfs_client;
1340 bool need_recover = false;
1341
1342 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly)
1343 need_recover = true;
1344 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly)
1345 need_recover = true;
1346 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr)
1347 need_recover = true;
1348 if (need_recover)
1349 nfs4_state_mark_reclaim_nograce(clp, state);
1350}
1351
e999e80e 1352static bool nfs_need_update_open_stateid(struct nfs4_state *state,
1393d961 1353 const nfs4_stateid *stateid, nfs4_stateid *freeme)
e999e80e
TM		 1354{
1355 if (test_and_set_bit(NFS_OPEN_STATE, &state->flags) == 0)
1356 return true;
4f14c194 1357 if (!nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1393d961 1358 nfs4_stateid_copy(freeme, &state->open_stateid);
4f14c194 1359 nfs_test_and_clear_all_open_stateid(state);
e999e80e 1360 return true;
4f14c194 1361 }
e999e80e
TM		 1362 if (nfs4_stateid_is_newer(stateid, &state->open_stateid))
1363 return true;
1364 return false;
1365}
1366
f95549cf
TM		 1367static void nfs_resync_open_stateid_locked(struct nfs4_state *state)
1368{
3c38cbe2
TM		 1369 if (!(state->n_wronly || state->n_rdonly || state->n_rdwr))
1370 return;
f95549cf
TM		 1371 if (state->n_wronly)
1372 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1373 if (state->n_rdonly)
1374 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1375 if (state->n_rdwr)
1376 set_bit(NFS_O_RDWR_STATE, &state->flags);
3c38cbe2 1377 set_bit(NFS_OPEN_STATE, &state->flags);
f95549cf
TM		 1378}
1379
226056c5
TM		 1380static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
1381 nfs4_stateid *stateid, fmode_t fmode)
003707c7 1382{
226056c5
TM		 1383 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1384 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1385 case FMODE_WRITE:
1386 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1387 break;
1388 case FMODE_READ:
1389 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1390 break;
1391 case 0:
1392 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1393 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1394 clear_bit(NFS_OPEN_STATE, &state->flags);
1395 }
1396 if (stateid == NULL)
1397 return;
3e7dfb16
TM		 1398 /* Handle OPEN+OPEN_DOWNGRADE races */
1399 if (nfs4_stateid_match_other(stateid, &state->open_stateid) &&
1400 !nfs4_stateid_is_newer(stateid, &state->open_stateid)) {
f95549cf 1401 nfs_resync_open_stateid_locked(state);
226056c5 1402 return;
f95549cf 1403 }
003707c7 1404 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 1405 nfs4_stateid_copy(&state->stateid, stateid);
1406 nfs4_stateid_copy(&state->open_stateid, stateid);
226056c5
TM		 1407}
1408
4a1e2feb
TM		 1409static void nfs_clear_open_stateid(struct nfs4_state *state,
1410 nfs4_stateid *arg_stateid,
1411 nfs4_stateid *stateid, fmode_t fmode)
226056c5
TM		 1412{
1413 write_seqlock(&state->seqlock);
3e7dfb16
TM		 1414 /* Ignore, if the CLOSE argment doesn't match the current stateid */
1415 if (nfs4_state_match_open_stateid_other(state, arg_stateid))
1416 nfs_clear_open_stateid_locked(state, stateid, fmode);
226056c5 1417 write_sequnlock(&state->seqlock);
4f14c194
TM		 1418 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1419 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
226056c5
TM		 1420}
1421
1393d961
TM		 1422static void nfs_set_open_stateid_locked(struct nfs4_state *state,
1423 const nfs4_stateid *stateid, fmode_t fmode,
1424 nfs4_stateid *freeme)
003707c7 1425{
dc0b027d 1426 switch (fmode) {
003707c7
TM		 1427 case FMODE_READ:
1428 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1429 break;
1430 case FMODE_WRITE:
1431 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1432 break;
1433 case FMODE_READ|FMODE_WRITE:
1434 set_bit(NFS_O_RDWR_STATE, &state->flags);
1435 }
1393d961 1436 if (!nfs_need_update_open_stateid(state, stateid, freeme))
e999e80e
TM		 1437 return;
1438 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1439 nfs4_stateid_copy(&state->stateid, stateid);
1440 nfs4_stateid_copy(&state->open_stateid, stateid);
003707c7
TM		 1441}
1442
1393d961
TM		 1443static void __update_open_stateid(struct nfs4_state *state,
1444 const nfs4_stateid *open_stateid,
1445 const nfs4_stateid *deleg_stateid,
1446 fmode_t fmode,
1447 nfs4_stateid *freeme)
1da177e4 1448{
8bda4e4c
TM		 1449 /*
1450 * Protect the call to nfs4_state_set_mode_locked and
1451 * serialise the stateid update
1452 */
361cad3c 1453 spin_lock(&state->owner->so_lock);
8bda4e4c 1454 write_seqlock(&state->seqlock);
003707c7 1455 if (deleg_stateid != NULL) {
f597c537 1456 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1457 set_bit(NFS_DELEGATED_STATE, &state->flags);
1458 }
1459 if (open_stateid != NULL)
1393d961 1460 nfs_set_open_stateid_locked(state, open_stateid, fmode, freeme);
8bda4e4c 1461 write_sequnlock(&state->seqlock);
dc0b027d 1462 update_open_stateflags(state, fmode);
ec073428 1463 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1464}
1465
1393d961
TM		 1466static int update_open_stateid(struct nfs4_state *state,
1467 const nfs4_stateid *open_stateid,
1468 const nfs4_stateid *delegation,
1469 fmode_t fmode)
34310430 1470{
1393d961
TM		 1471 struct nfs_server *server = NFS_SERVER(state->inode);
1472 struct nfs_client *clp = server->nfs_client;
34310430
TM		 1473 struct nfs_inode *nfsi = NFS_I(state->inode);
1474 struct nfs_delegation *deleg_cur;
83aa3e0f 1475 nfs4_stateid freeme = { };
34310430
TM		 1476 int ret = 0;
1477
dc0b027d 1478 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1479
1480 rcu_read_lock();
1481 deleg_cur = rcu_dereference(nfsi->delegation);
1482 if (deleg_cur == NULL)
1483 goto no_delegation;
1484
1485 spin_lock(&deleg_cur->lock);
17f26b12 1486 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
d25be546 1487 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1488 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1489 goto no_delegation_unlock;
1490
1491 if (delegation == NULL)
1492 delegation = &deleg_cur->stateid;
f597c537 1493 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1494 goto no_delegation_unlock;
1495
b7391f44 1496 nfs_mark_delegation_referenced(deleg_cur);
1393d961
TM		 1497 __update_open_stateid(state, open_stateid, &deleg_cur->stateid,
1498 fmode, &freeme);
34310430
TM		 1499 ret = 1;
1500no_delegation_unlock:
1501 spin_unlock(&deleg_cur->lock);
1502no_delegation:
1503 rcu_read_unlock();
1504
1505 if (!ret && open_stateid != NULL) {
1393d961 1506 __update_open_stateid(state, open_stateid, NULL, fmode, &freeme);
34310430
TM		 1507 ret = 1;
1508 }
4f14c194 1509 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1393d961
TM		 1510 nfs4_schedule_state_manager(clp);
1511 if (freeme.type != 0)
1512 nfs4_test_and_free_stateid(server, &freeme,
1513 state->owner->so_cred);
34310430
TM		 1514
1515 return ret;
1516}
1517
39071e6f
TM		 1518static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp,
1519 const nfs4_stateid *stateid)
1520{
1521 struct nfs4_state *state = lsp->ls_state;
1522 bool ret = false;
1523
1524 spin_lock(&state->state_lock);
1525 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid))
1526 goto out_noupdate;
1527 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid))
1528 goto out_noupdate;
1529 nfs4_stateid_copy(&lsp->ls_stateid, stateid);
1530 ret = true;
1531out_noupdate:
1532 spin_unlock(&state->state_lock);
1533 return ret;
1534}
34310430 1535
dc0b027d 1536static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1537{
1538 struct nfs_delegation *delegation;
1539
1540 rcu_read_lock();
1541 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1542 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1543 rcu_read_unlock();
1544 return;
1545 }
1546 rcu_read_unlock();
57ec14c5 1547 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1548}
1549
6ee41268 1550static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1551{
1552 struct nfs4_state *state = opendata->state;
1553 struct nfs_inode *nfsi = NFS_I(state->inode);
1554 struct nfs_delegation *delegation;
f448badd 1555 int open_mode = opendata->o_arg.open_flags;
dc0b027d 1556 fmode_t fmode = opendata->o_arg.fmode;
2a606188 1557 enum open_claim_type4 claim = opendata->o_arg.claim;
aac00a8d
TM		 1558 nfs4_stateid stateid;
1559 int ret = -EAGAIN;
1560
aac00a8d 1561 for (;;) {
61beef75 1562 spin_lock(&state->owner->so_lock);
dc0b027d 1563 if (can_open_cached(state, fmode, open_mode)) {
61beef75 1564 update_open_stateflags(state, fmode);
6ee41268 1565 spin_unlock(&state->owner->so_lock);
61beef75 1566 goto out_return_state;
6ee41268 1567 }
61beef75 1568 spin_unlock(&state->owner->so_lock);
34310430
TM		 1569 rcu_read_lock();
1570 delegation = rcu_dereference(nfsi->delegation);
2a606188 1571 if (!can_open_delegated(delegation, fmode, claim)) {
34310430 1572 rcu_read_unlock();
aac00a8d 1573 break;
34310430 1574 }
aac00a8d 1575 /* Save the delegation */
f597c537 1576 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1577 rcu_read_unlock();
fa332941 1578 nfs_release_seqid(opendata->o_arg.seqid);
bdeca1b7
TM		 1579 if (!opendata->is_recover) {
1580 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1581 if (ret != 0)
1582 goto out;
1583 }
aac00a8d 1584 ret = -EAGAIN;
34310430
TM		 1585
1586 /* Try to update the stateid using the delegation */
dc0b027d 1587 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1588 goto out_return_state;
aac00a8d 1589 }
aac00a8d
TM		 1590out:
1591 return ERR_PTR(ret);
1592out_return_state:
1593 atomic_inc(&state->count);
1594 return state;
1595}
1596
e23008ec
AA		 1597static void
1598nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1599{
1600 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1601 struct nfs_delegation *delegation;
1602 int delegation_flags = 0;
1603
1604 rcu_read_lock();
1605 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1606 if (delegation)
1607 delegation_flags = delegation->flags;
1608 rcu_read_unlock();
72d79ff8
TM		 1609 switch (data->o_arg.claim) {
1610 default:
1611 break;
1612 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1613 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
e23008ec
AA		 1614 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1615 "returning a delegation for "
1616 "OPEN(CLAIM_DELEGATE_CUR)\n",
1617 clp->cl_hostname);
72d79ff8
TM		 1618 return;
1619 }
1620 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
e23008ec
AA		 1621 nfs_inode_set_delegation(state->inode,
1622 data->owner->so_cred,
1623 &data->o_res);
1624 else
1625 nfs_inode_reclaim_delegation(state->inode,
1626 data->owner->so_cred,
1627 &data->o_res);
1628}
1629
1630/*
1631 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1632 * and update the nfs4_state.
1633 */
1634static struct nfs4_state *
1635_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1636{
1637 struct inode *inode = data->state->inode;
1638 struct nfs4_state *state = data->state;
1639 int ret;
1640
d2bfda2e 1641 if (!data->rpc_done) {
37a8484a
AS		 1642 if (data->rpc_status)
1643 return ERR_PTR(data->rpc_status);
d2bfda2e
WAA		 1644 /* cached opens have already been processed */
1645 goto update;
e23008ec
AA		 1646 }
1647
e23008ec
AA		 1648 ret = nfs_refresh_inode(inode, &data->f_attr);
1649 if (ret)
37a8484a 1650 return ERR_PTR(ret);
e23008ec
AA		 1651
1652 if (data->o_res.delegation_type != 0)
1653 nfs4_opendata_check_deleg(data, state);
d2bfda2e 1654update:
e23008ec
AA		 1655 update_open_stateid(state, &data->o_res.stateid, NULL,
1656 data->o_arg.fmode);
d49f042a 1657 atomic_inc(&state->count);
e23008ec
AA		 1658
1659 return state;
e23008ec
AA		 1660}
1661
1662static struct nfs4_state *
1663_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1664{
1665 struct inode *inode;
1666 struct nfs4_state *state = NULL;
1b370bc2 1667 int ret;
24ac23ab 1668
aac00a8d 1669 if (!data->rpc_done) {
6ee41268 1670 state = nfs4_try_open_cached(data);
9759b0fb 1671 trace_nfs4_cached_open(data->state);
aac00a8d
TM		 1672 goto out;
1673 }
1674
1b370bc2 1675 ret = -EAGAIN;
24ac23ab 1676 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1677 goto err;
1775fd3e 1678 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1b370bc2 1679 ret = PTR_ERR(inode);
03f28e3a 1680 if (IS_ERR(inode))
1b370bc2
TM		 1681 goto err;
1682 ret = -ENOMEM;
24ac23ab
TM		 1683 state = nfs4_get_open_state(inode, data->owner);
1684 if (state == NULL)
1b370bc2 1685 goto err_put_inode;
e23008ec
AA		 1686 if (data->o_res.delegation_type != 0)
1687 nfs4_opendata_check_deleg(data, state);
34310430 1688 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1689 data->o_arg.fmode);
24ac23ab 1690 iput(inode);
aac00a8d 1691out:
7aa262b5 1692 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1693 return state;
1b370bc2
TM		 1694err_put_inode:
1695 iput(inode);
1696err:
1697 return ERR_PTR(ret);
24ac23ab
TM		 1698}
1699
e23008ec
AA		 1700static struct nfs4_state *
1701nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1702{
2e80dbe7
TM		 1703 struct nfs4_state *ret;
1704
e23008ec 1705 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
2e80dbe7
TM		 1706 ret =_nfs4_opendata_reclaim_to_nfs4_state(data);
1707 else
1708 ret = _nfs4_opendata_to_nfs4_state(data);
1709 nfs4_sequence_free_slot(&data->o_res.seq_res);
1710 return ret;
e23008ec
AA		 1711}
1712
864472e9
TM		 1713static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1714{
1715 struct nfs_inode *nfsi = NFS_I(state->inode);
1716 struct nfs_open_context *ctx;
1717
1718 spin_lock(&state->inode->i_lock);
1719 list_for_each_entry(ctx, &nfsi->open_files, list) {
1720 if (ctx->state != state)
1721 continue;
1722 get_nfs_open_context(ctx);
1723 spin_unlock(&state->inode->i_lock);
1724 return ctx;
1725 }
1726 spin_unlock(&state->inode->i_lock);
1727 return ERR_PTR(-ENOENT);
1728}
1729
4a1c0893
TM		 1730static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1731 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1732{
1733 struct nfs4_opendata *opendata;
1734
4a1c0893 1735 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1775fd3e 1736 NULL, NULL, claim, GFP_NOFS);
6f220ed5
TM		 1737 if (opendata == NULL)
1738 return ERR_PTR(-ENOMEM);
1739 opendata->state = state;
1740 atomic_inc(&state->count);
1741 return opendata;
1742}
1743
24311f88
TM		 1744static int nfs4_open_recover_helper(struct nfs4_opendata *opendata,
1745 fmode_t fmode)
864472e9 1746{
2ced46c2 1747 struct nfs4_state *newstate;
864472e9
TM		 1748 int ret;
1749
24311f88 1750 if (!nfs4_mode_match_open_stateid(opendata->state, fmode))
39f897fd 1751 return 0;
dc0b027d
TM		 1752 opendata->o_arg.open_flags = 0;
1753 opendata->o_arg.fmode = fmode;
be36e185
TM		 1754 opendata->o_arg.share_access = nfs4_map_atomic_open_share(
1755 NFS_SB(opendata->dentry->d_sb),
1756 fmode, 0);
2ced46c2
TM		 1757 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1758 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1759 nfs4_init_opendata_res(opendata);
b257957e 1760 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1761 if (ret != 0)
1762 return ret;
2ced46c2 1763 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1764 if (IS_ERR(newstate))
1765 return PTR_ERR(newstate);
24311f88
TM		 1766 if (newstate != opendata->state)
1767 ret = -ESTALE;
643168c2 1768 nfs4_close_state(newstate, fmode);
24311f88 1769 return ret;
864472e9
TM		 1770}
1771
1772static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1773{
864472e9
TM		 1774 int ret;
1775
4f14c194
TM		 1776 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */
1777 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1778 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1779 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
864472e9 1780 /* memory barrier prior to reading state->n_* */
2ced46c2 1781 clear_bit(NFS_DELEGATED_STATE, &state->flags);
fd068b20 1782 clear_bit(NFS_OPEN_STATE, &state->flags);
864472e9 1783 smp_rmb();
24311f88
TM		 1784 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
1785 if (ret != 0)
1786 return ret;
1787 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE);
1788 if (ret != 0)
1789 return ret;
1790 ret = nfs4_open_recover_helper(opendata, FMODE_READ);
1791 if (ret != 0)
1792 return ret;
1ac7e2fd
TM		 1793 /*
1794 * We may have performed cached opens for all three recoveries.
1795 * Check if we need to update the current stateid.
1796 */
1797 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1798 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1799 write_seqlock(&state->seqlock);
1ac7e2fd 1800 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1801 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1802 write_sequnlock(&state->seqlock);
1ac7e2fd 1803 }
864472e9
TM		 1804 return 0;
1805}
1806
1da177e4
LT		 1807/*
1808 * OPEN_RECLAIM:
1809 * reclaim state on the server after a reboot.
1da177e4 1810 */
539cd03a 1811static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1812{
1ac7e2fd 1813 struct nfs_delegation *delegation;
864472e9 1814 struct nfs4_opendata *opendata;
dc0b027d 1815 fmode_t delegation_type = 0;
1da177e4
LT		 1816 int status;
1817
4a1c0893
TM		 1818 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1819 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1820 if (IS_ERR(opendata))
1821 return PTR_ERR(opendata);
1ac7e2fd
TM		 1822 rcu_read_lock();
1823 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1824 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1825 delegation_type = delegation->type;
1ac7e2fd 1826 rcu_read_unlock();
864472e9
TM		 1827 opendata->o_arg.u.delegation_type = delegation_type;
1828 status = nfs4_open_recover(opendata, state);
c6d00e63 1829 nfs4_opendata_put(opendata);
1da177e4
LT		 1830 return status;
1831}
1832
539cd03a 1833static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1834{
1835 struct nfs_server *server = NFS_SERVER(state->inode);
1836 struct nfs4_exception exception = { };
1837 int err;
1838 do {
539cd03a 1839 err = _nfs4_do_open_reclaim(ctx, state);
42113a75 1840 trace_nfs4_open_reclaim(ctx, 0, err);
49f9a0fa
TM		 1841 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1842 continue;
168667c4 1843 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1844 break;
1845 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1846 } while (exception.retry);
1847 return err;
1848}
1849
864472e9
TM		 1850static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1851{
1852 struct nfs_open_context *ctx;
1853 int ret;
1854
1855 ctx = nfs4_state_find_open_context(state);
1856 if (IS_ERR(ctx))
91876b13 1857 return -EAGAIN;
539cd03a 1858 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1859 put_nfs_open_context(ctx);
1860 return ret;
1861}
1862
db4f2e63 1863static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1da177e4 1864{
be76b5b6
TM		 1865 switch (err) {
1866 default:
1867 printk(KERN_ERR "NFS: %s: unhandled error "
1868 "%d.\n", __func__, err);
1869 case 0:
1870 case -ENOENT:
8eee52af 1871 case -EAGAIN:
be76b5b6
TM		 1872 case -ESTALE:
1873 break;
1874 case -NFS4ERR_BADSESSION:
1875 case -NFS4ERR_BADSLOT:
1876 case -NFS4ERR_BAD_HIGH_SLOT:
1877 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1878 case -NFS4ERR_DEADSESSION:
1879 set_bit(NFS_DELEGATED_STATE, &state->flags);
1880 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1881 return -EAGAIN;
1882 case -NFS4ERR_STALE_CLIENTID:
1883 case -NFS4ERR_STALE_STATEID:
1884 set_bit(NFS_DELEGATED_STATE, &state->flags);
be76b5b6
TM		 1885 /* Don't recall a delegation if it was lost */
1886 nfs4_schedule_lease_recovery(server->nfs_client);
1887 return -EAGAIN;
352297b9
CL		 1888 case -NFS4ERR_MOVED:
1889 nfs4_schedule_migration_recovery(server);
1890 return -EAGAIN;
8ef2f8d4
CL		 1891 case -NFS4ERR_LEASE_MOVED:
1892 nfs4_schedule_lease_moved_recovery(server->nfs_client);
1893 return -EAGAIN;
be76b5b6
TM		 1894 case -NFS4ERR_DELEG_REVOKED:
1895 case -NFS4ERR_ADMIN_REVOKED:
404ea356 1896 case -NFS4ERR_EXPIRED:
be76b5b6 1897 case -NFS4ERR_BAD_STATEID:
db4f2e63 1898 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 1899 nfs_inode_find_state_and_recover(state->inode,
1900 stateid);
1901 nfs4_schedule_stateid_recovery(server, state);
869f9dfa 1902 return -EAGAIN;
be76b5b6
TM		 1903 case -NFS4ERR_DELAY:
1904 case -NFS4ERR_GRACE:
1905 set_bit(NFS_DELEGATED_STATE, &state->flags);
1906 ssleep(1);
1907 return -EAGAIN;
db4f2e63
TM		 1908 case -ENOMEM:
1909 case -NFS4ERR_DENIED:
1910 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1911 return 0;
be76b5b6 1912 }
1da177e4
LT		 1913 return err;
1914}
1915
24311f88
TM		 1916int nfs4_open_delegation_recall(struct nfs_open_context *ctx,
1917 struct nfs4_state *state, const nfs4_stateid *stateid,
1918 fmode_t type)
db4f2e63
TM		 1919{
1920 struct nfs_server *server = NFS_SERVER(state->inode);
1921 struct nfs4_opendata *opendata;
24311f88 1922 int err = 0;
db4f2e63
TM		 1923
1924 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1925 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1926 if (IS_ERR(opendata))
1927 return PTR_ERR(opendata);
1928 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
5e99b532
JL		 1929 write_seqlock(&state->seqlock);
1930 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1931 write_sequnlock(&state->seqlock);
24311f88
TM		 1932 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1933 switch (type & (FMODE_READ|FMODE_WRITE)) {
1934 case FMODE_READ|FMODE_WRITE:
1935 case FMODE_WRITE:
1936 err = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
1937 if (err)
1938 break;
1939 err = nfs4_open_recover_helper(opendata, FMODE_WRITE);
1940 if (err)
1941 break;
1942 case FMODE_READ:
1943 err = nfs4_open_recover_helper(opendata, FMODE_READ);
1944 }
db4f2e63
TM		 1945 nfs4_opendata_put(opendata);
1946 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1947}
1948
be05c860
CL		 1949static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1950{
1951 struct nfs4_opendata *data = calldata;
1952
7981c8a6
AS		 1953 nfs4_setup_sequence(data->o_arg.server->nfs_client,
1954 &data->c_arg.seq_args, &data->c_res.seq_res, task);
be05c860
CL		 1955}
1956
cdd4e68b
TM		 1957static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1958{
1959 struct nfs4_opendata *data = calldata;
1960
17ead6c8 1961 nfs40_sequence_done(task, &data->c_res.seq_res);
be05c860 1962
cdd4e68b 1963 data->rpc_status = task->tk_status;
26e976a8 1964 if (data->rpc_status == 0) {
f597c537 1965 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1966 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1967 renew_lease(data->o_res.server, data->timestamp);
a7a3b1e9 1968 data->rpc_done = true;
26e976a8 1969 }
cdd4e68b
TM		 1970}
1971
1972static void nfs4_open_confirm_release(void *calldata)
1973{
1974 struct nfs4_opendata *data = calldata;
1975 struct nfs4_state *state = NULL;
1976
1977 /* If this request hasn't been cancelled, do nothing */
a7a3b1e9 1978 if (!data->cancelled)
cdd4e68b
TM		 1979 goto out_free;
1980 /* In case of error, no cleanup! */
3e309914 1981 if (!data->rpc_done)
cdd4e68b 1982 goto out_free;
cdd4e68b 1983 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1984 if (!IS_ERR(state))
643168c2 1985 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1986out_free:
c6d00e63 1987 nfs4_opendata_put(data);
cdd4e68b
TM		 1988}
1989
1990static const struct rpc_call_ops nfs4_open_confirm_ops = {
be05c860 1991 .rpc_call_prepare = nfs4_open_confirm_prepare,
cdd4e68b
TM		 1992 .rpc_call_done = nfs4_open_confirm_done,
1993 .rpc_release = nfs4_open_confirm_release,
1994};
1995
1996/*
1997 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1998 */
1999static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
2000{
2b0143b5 2001 struct nfs_server *server = NFS_SERVER(d_inode(data->dir));
cdd4e68b 2002 struct rpc_task *task;
5138fde0
TM		 2003 struct rpc_message msg = {
2004 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
2005 .rpc_argp = &data->c_arg,
2006 .rpc_resp = &data->c_res,
2007 .rpc_cred = data->owner->so_cred,
2008 };
c970aa85
TM		 2009 struct rpc_task_setup task_setup_data = {
2010 .rpc_client = server->client,
5138fde0 2011 .rpc_message = &msg,
c970aa85
TM		 2012 .callback_ops = &nfs4_open_confirm_ops,
2013 .callback_data = data,
101070ca 2014 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2015 .flags = RPC_TASK_ASYNC,
2016 };
1da177e4
LT		 2017 int status;
2018
17ead6c8 2019 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1);
c6d00e63 2020 kref_get(&data->kref);
a7a3b1e9 2021 data->rpc_done = false;
3e309914 2022 data->rpc_status = 0;
5138fde0 2023 data->timestamp = jiffies;
e92c1e0d
BC		 2024 if (data->is_recover)
2025 nfs4_set_sequence_privileged(&data->c_arg.seq_args);
c970aa85 2026 task = rpc_run_task(&task_setup_data);
7a1218a2 2027 if (IS_ERR(task))
cdd4e68b 2028 return PTR_ERR(task);
820bf85c 2029 status = rpc_wait_for_completion_task(task);
cdd4e68b 2030 if (status != 0) {
a7a3b1e9 2031 data->cancelled = true;
cdd4e68b
TM		 2032 smp_wmb();
2033 } else
2034 status = data->rpc_status;
e6b3c4db 2035 rpc_put_task(task);
1da177e4
LT		 2036 return status;
2037}
2038
24ac23ab 2039static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 2040{
24ac23ab
TM		 2041 struct nfs4_opendata *data = calldata;
2042 struct nfs4_state_owner *sp = data->owner;
549b19cc 2043 struct nfs_client *clp = sp->so_server->nfs_client;
2a606188 2044 enum open_claim_type4 claim = data->o_arg.claim;
5138fde0 2045
24ac23ab 2046 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 2047 goto out_wait;
aac00a8d
TM		 2048 /*
2049 * Check if we still need to send an OPEN call, or if we can use
2050 * a delegation instead.
2051 */
2052 if (data->state != NULL) {
2053 struct nfs_delegation *delegation;
2054
dc0b027d 2055 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 2056 goto out_no_action;
aac00a8d
TM		 2057 rcu_read_lock();
2058 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
2a606188 2059 if (can_open_delegated(delegation, data->o_arg.fmode, claim))
652f89f6 2060 goto unlock_no_action;
aac00a8d
TM		 2061 rcu_read_unlock();
2062 }
95b72eb0 2063 /* Update client id. */
549b19cc 2064 data->o_arg.clientid = clp->cl_clientid;
2a606188
TM		 2065 switch (claim) {
2066 default:
2067 break;
8188df17
TM		 2068 case NFS4_OPEN_CLAIM_PREVIOUS:
2069 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
2070 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 2071 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
8188df17
TM		 2072 case NFS4_OPEN_CLAIM_FH:
2073 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 2074 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
2075 }
26e976a8 2076 data->timestamp = jiffies;
42e1cca7 2077 if (nfs4_setup_sequence(data->o_arg.server->nfs_client,
d898528c 2078 &data->o_arg.seq_args,
2240a9e2
TM		 2079 &data->o_res.seq_res,
2080 task) != 0)
2081 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 2082
2083 /* Set the create mode (note dependency on the session type) */
2084 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
2085 if (data->o_arg.open_flags & O_EXCL) {
2086 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
2087 if (nfs4_has_persistent_session(clp))
2088 data->o_arg.createmode = NFS4_CREATE_GUARDED;
2089 else if (clp->cl_mvops->minor_version > 0)
2090 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
2091 }
6ee41268 2092 return;
652f89f6 2093unlock_no_action:
9759b0fb 2094 trace_nfs4_cached_open(data->state);
652f89f6 2095 rcu_read_unlock();
6ee41268
TM		 2096out_no_action:
2097 task->tk_action = NULL;
c8da19b9 2098out_wait:
b75ad4cd 2099 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 2100}
2101
24ac23ab
TM		 2102static void nfs4_open_done(struct rpc_task *task, void *calldata)
2103{
2104 struct nfs4_opendata *data = calldata;
1da177e4 2105
24ac23ab 2106 data->rpc_status = task->tk_status;
d898528c 2107
2e80dbe7 2108 if (!nfs4_sequence_process(task, &data->o_res.seq_res))
14516c3a 2109 return;
d898528c 2110
24ac23ab 2111 if (task->tk_status == 0) {
807d66d8
TM		 2112 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
2113 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 2114 case S_IFREG:
2115 break;
2116 case S_IFLNK:
24ac23ab 2117 data->rpc_status = -ELOOP;
6f926b5b
TM		 2118 break;
2119 case S_IFDIR:
24ac23ab 2120 data->rpc_status = -EISDIR;
6f926b5b
TM		 2121 break;
2122 default:
24ac23ab 2123 data->rpc_status = -ENOTDIR;
807d66d8 2124 }
6f926b5b 2125 }
26e976a8 2126 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 2127 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
2128 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 2129 }
a7a3b1e9 2130 data->rpc_done = true;
24ac23ab 2131}
6f926b5b 2132
24ac23ab
TM		 2133static void nfs4_open_release(void *calldata)
2134{
2135 struct nfs4_opendata *data = calldata;
2136 struct nfs4_state *state = NULL;
2137
2138 /* If this request hasn't been cancelled, do nothing */
a7a3b1e9 2139 if (!data->cancelled)
24ac23ab
TM		 2140 goto out_free;
2141 /* In case of error, no cleanup! */
3e309914 2142 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 2143 goto out_free;
2144 /* In case we need an open_confirm, no cleanup! */
2145 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
2146 goto out_free;
24ac23ab 2147 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 2148 if (!IS_ERR(state))
643168c2 2149 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 2150out_free:
c6d00e63 2151 nfs4_opendata_put(data);
24ac23ab
TM		 2152}
2153
2154static const struct rpc_call_ops nfs4_open_ops = {
2155 .rpc_call_prepare = nfs4_open_prepare,
2156 .rpc_call_done = nfs4_open_done,
2157 .rpc_release = nfs4_open_release,
2158};
2159
b257957e 2160static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab 2161{
2b0143b5 2162 struct inode *dir = d_inode(data->dir);
24ac23ab
TM		 2163 struct nfs_server *server = NFS_SERVER(dir);
2164 struct nfs_openargs *o_arg = &data->o_arg;
2165 struct nfs_openres *o_res = &data->o_res;
2166 struct rpc_task *task;
5138fde0
TM		 2167 struct rpc_message msg = {
2168 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
2169 .rpc_argp = o_arg,
2170 .rpc_resp = o_res,
2171 .rpc_cred = data->owner->so_cred,
2172 };
c970aa85
TM		 2173 struct rpc_task_setup task_setup_data = {
2174 .rpc_client = server->client,
5138fde0 2175 .rpc_message = &msg,
c970aa85
TM		 2176 .callback_ops = &nfs4_open_ops,
2177 .callback_data = data,
101070ca 2178 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2179 .flags = RPC_TASK_ASYNC,
2180 };
24ac23ab
TM		 2181 int status;
2182
a9c92d6b 2183 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 2184 kref_get(&data->kref);
a7a3b1e9 2185 data->rpc_done = false;
3e309914 2186 data->rpc_status = 0;
a7a3b1e9
BC		 2187 data->cancelled = false;
2188 data->is_recover = false;
bdeca1b7 2189 if (isrecover) {
8fe72bac 2190 nfs4_set_sequence_privileged(&o_arg->seq_args);
a7a3b1e9 2191 data->is_recover = true;
bdeca1b7 2192 }
c970aa85 2193 task = rpc_run_task(&task_setup_data);
d9b67e1e
AS		 2194 if (IS_ERR(task))
2195 return PTR_ERR(task);
820bf85c 2196 status = rpc_wait_for_completion_task(task);
d9b67e1e 2197 if (status != 0) {
a7a3b1e9 2198 data->cancelled = true;
d9b67e1e
AS		 2199 smp_wmb();
2200 } else
2201 status = data->rpc_status;
2202 rpc_put_task(task);
b257957e
AB		 2203
2204 return status;
2205}
2206
2207static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
2208{
2b0143b5 2209 struct inode *dir = d_inode(data->dir);
b257957e 2210 struct nfs_openres *o_res = &data->o_res;
d9b67e1e 2211 int status;
b257957e
AB		 2212
2213 status = nfs4_run_open_task(data, 1);
2214 if (status != 0 || !data->rpc_done)
2215 return status;
2216
6926afd1
TM		 2217 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
2218
d7e98258 2219 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM)
b257957e 2220 status = _nfs4_proc_open_confirm(data);
b257957e
AB		 2221
2222 return status;
2223}
2224
f3792d63
TM		 2225/*
2226 * Additional permission checks in order to distinguish between an
2227 * open for read, and an open for execute. This works around the
2228 * fact that NFSv4 OPEN treats read and execute permissions as being
2229 * the same.
2230 * Note that in the non-execute case, we want to turn off permission
2231 * checking if we just created a new file (POSIX open() semantics).
2232 */
6168f62c
WAA		 2233static int nfs4_opendata_access(struct rpc_cred *cred,
2234 struct nfs4_opendata *opendata,
f8d9a897
WAA		 2235 struct nfs4_state *state, fmode_t fmode,
2236 int openflags)
6168f62c
WAA		 2237{
2238 struct nfs_access_entry cache;
2239 u32 mask;
2240
2241 /* access call failed or for some reason the server doesn't
2242 * support any access modes -- defer access call until later */
2243 if (opendata->o_res.access_supported == 0)
2244 return 0;
2245
2246 mask = 0;
f3792d63
TM		 2247 /*
2248 * Use openflags to check for exec, because fmode won't
2249 * always have FMODE_EXEC set when file open for exec.
2250 */
f8d9a897
WAA		 2251 if (openflags & __FMODE_EXEC) {
2252 /* ONLY check for exec rights */
2253 mask = MAY_EXEC;
f3792d63 2254 } else if ((fmode & FMODE_READ) && !opendata->file_created)
f8d9a897 2255 mask = MAY_READ;
6168f62c
WAA		 2256
2257 cache.cred = cred;
2258 cache.jiffies = jiffies;
2259 nfs_access_set_mask(&cache, opendata->o_res.access_result);
2260 nfs_access_add_cache(state->inode, &cache);
2261
bbd3a8ee 2262 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 2263 return 0;
2264
998f40b5 2265 return -EACCES;
6168f62c
WAA		 2266}
2267
b257957e
AB		 2268/*
2269 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2270 */
2271static int _nfs4_proc_open(struct nfs4_opendata *data)
2272{
2b0143b5 2273 struct inode *dir = d_inode(data->dir);
b257957e
AB		 2274 struct nfs_server *server = NFS_SERVER(dir);
2275 struct nfs_openargs *o_arg = &data->o_arg;
2276 struct nfs_openres *o_res = &data->o_res;
2277 int status;
2278
2279 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 2280 if (!data->rpc_done)
2281 return status;
2282 if (status != 0) {
2283 if (status == -NFS4ERR_BADNAME &&
2284 !(o_arg->open_flags & O_CREAT))
2285 return -ENOENT;
24ac23ab 2286 return status;
08ef7bd3 2287 }
24ac23ab 2288
6926afd1
TM		 2289 nfs_fattr_map_and_free_names(server, &data->f_attr);
2290
5bc2afc2 2291 if (o_arg->open_flags & O_CREAT) {
5bc2afc2 2292 if (o_arg->open_flags & O_EXCL)
a7a3b1e9 2293 data->file_created = true;
5bc2afc2 2294 else if (o_res->cinfo.before != o_res->cinfo.after)
a7a3b1e9 2295 data->file_created = true;
2dfc6173 2296 if (data->file_created || dir->i_version != o_res->cinfo.after)
d3129ef6
TM		 2297 update_changeattr(dir, &o_res->cinfo,
2298 o_res->f_attr->time_start);
5bc2afc2 2299 }
0df5dd4a
TM		 2300 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2301 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 2302 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 2303 status = _nfs4_proc_open_confirm(data);
1da177e4 2304 if (status != 0)
24ac23ab 2305 return status;
1da177e4 2306 }
56e0d71e
TM		 2307 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR)) {
2308 nfs4_sequence_free_slot(&o_res->seq_res);
8935ef66 2309 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
56e0d71e 2310 }
24ac23ab 2311 return 0;
1da177e4
LT		 2312}
2313
1da177e4
LT		 2314/*
2315 * OPEN_EXPIRED:
2316 * reclaim state on the server after a network partition.
2317 * Assumes caller holds the appropriate lock
2318 */
539cd03a 2319static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 2320{
e56e0b78 2321 struct nfs4_opendata *opendata;
864472e9 2322 int ret;
1da177e4 2323
4a1c0893 2324 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 2325 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 2326 if (IS_ERR(opendata))
2327 return PTR_ERR(opendata);
864472e9 2328 ret = nfs4_open_recover(opendata, state);
35d05778 2329 if (ret == -ESTALE)
3d4ff43d 2330 d_drop(ctx->dentry);
c6d00e63 2331 nfs4_opendata_put(opendata);
864472e9 2332 return ret;
1da177e4
LT		 2333}
2334
a9ed2e25 2335static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 2336{
539cd03a 2337 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 2338 struct nfs4_exception exception = { };
2339 int err;
2340
2341 do {
539cd03a 2342 err = _nfs4_open_expired(ctx, state);
42113a75 2343 trace_nfs4_open_expired(ctx, 0, err);
49f9a0fa
TM		 2344 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2345 continue;
a9ed2e25
TM		 2346 switch (err) {
2347 default:
2348 goto out;
2349 case -NFS4ERR_GRACE:
2350 case -NFS4ERR_DELAY:
2351 nfs4_handle_exception(server, err, &exception);
2352 err = 0;
2353 }
202b50dc 2354 } while (exception.retry);
a9ed2e25 2355out:
202b50dc
TM		 2356 return err;
2357}
2358
1da177e4
LT		 2359static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2360{
1da177e4 2361 struct nfs_open_context *ctx;
864472e9 2362 int ret;
1da177e4 2363
864472e9
TM		 2364 ctx = nfs4_state_find_open_context(state);
2365 if (IS_ERR(ctx))
91876b13 2366 return -EAGAIN;
539cd03a 2367 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 2368 put_nfs_open_context(ctx);
2369 return ret;
1da177e4
LT		 2370}
2371
41020b67
TM		 2372static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state,
2373 const nfs4_stateid *stateid)
4dfd4f7a 2374{
41020b67 2375 nfs_remove_bad_delegation(state->inode, stateid);
4dfd4f7a
TM		 2376 write_seqlock(&state->seqlock);
2377 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2378 write_sequnlock(&state->seqlock);
2379 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2380}
2381
2382static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
2383{
2384 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
41020b67 2385 nfs_finish_clear_delegation_stateid(state, NULL);
4dfd4f7a
TM		 2386}
2387
2388static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2389{
2390 /* NFSv4.0 doesn't allow for delegation recovery on open expire */
2391 nfs40_clear_delegation_stateid(state);
2392 return nfs4_open_expired(sp, state);
2393}
2394
45870d69
TM		 2395static int nfs40_test_and_free_expired_stateid(struct nfs_server *server,
2396 nfs4_stateid *stateid,
2397 struct rpc_cred *cred)
2398{
2399 return -NFS4ERR_BAD_STATEID;
2400}
2401
f062eb6c 2402#if defined(CONFIG_NFS_V4_1)
4586f6e2
TM		 2403static int nfs41_test_and_free_expired_stateid(struct nfs_server *server,
2404 nfs4_stateid *stateid,
2405 struct rpc_cred *cred)
2406{
2407 int status;
2408
f7a62ada
TM		 2409 switch (stateid->type) {
2410 default:
2411 break;
2412 case NFS4_INVALID_STATEID_TYPE:
2413 case NFS4_SPECIAL_STATEID_TYPE:
2414 return -NFS4ERR_BAD_STATEID;
2415 case NFS4_REVOKED_STATEID_TYPE:
2416 goto out_free;
2417 }
4586f6e2 2418
f7a62ada 2419 status = nfs41_test_stateid(server, stateid, cred);
4586f6e2
TM		 2420 switch (status) {
2421 case -NFS4ERR_EXPIRED:
2422 case -NFS4ERR_ADMIN_REVOKED:
2423 case -NFS4ERR_DELEG_REVOKED:
f7a62ada
TM		 2424 break;
2425 default:
4586f6e2
TM		 2426 return status;
2427 }
f7a62ada
TM		 2428out_free:
2429 /* Ack the revoked state to the server */
f0b0bf88 2430 nfs41_free_stateid(server, stateid, cred, true);
f7a62ada 2431 return -NFS4ERR_EXPIRED;
4586f6e2
TM		 2432}
2433
0c116cad 2434static void nfs41_check_delegation_stateid(struct nfs4_state *state)
f062eb6c 2435{
f062eb6c 2436 struct nfs_server *server = NFS_SERVER(state->inode);
0c116cad 2437 nfs4_stateid stateid;
ab7cb0df 2438 struct nfs_delegation *delegation;
0c116cad
TM		 2439 struct rpc_cred *cred;
2440 int status;
3e60ffdd 2441
ab7cb0df
TM		 2442 /* Get the delegation credential for use by test/free_stateid */
2443 rcu_read_lock();
2444 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
0c116cad 2445 if (delegation == NULL) {
ab7cb0df 2446 rcu_read_unlock();
0c116cad
TM		 2447 return;
2448 }
2449
2450 nfs4_stateid_copy(&stateid, &delegation->stateid);
0e3d3e5d
OK		 2451 if (test_bit(NFS_DELEGATION_REVOKED, &delegation->flags) ||
2452 !test_and_clear_bit(NFS_DELEGATION_TEST_EXPIRED,
2453 &delegation->flags)) {
4c8e5447 2454 rcu_read_unlock();
41020b67 2455 nfs_finish_clear_delegation_stateid(state, &stateid);
4c8e5447
TM		 2456 return;
2457 }
0c116cad 2458
0c116cad
TM		 2459 cred = get_rpccred(delegation->cred);
2460 rcu_read_unlock();
4586f6e2 2461 status = nfs41_test_and_free_expired_stateid(server, &stateid, cred);
0c116cad 2462 trace_nfs4_test_delegation_stateid(state, NULL, status);
f7a62ada 2463 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID)
41020b67 2464 nfs_finish_clear_delegation_stateid(state, &stateid);
ab7cb0df 2465
0c116cad 2466 put_rpccred(cred);
3e60ffdd
CL		 2467}
2468
c5896fc8
TM		 2469/**
2470 * nfs41_check_expired_locks - possibly free a lock stateid
2471 *
2472 * @state: NFSv4 state for an inode
2473 *
2474 * Returns NFS_OK if recovery for this stateid is now finished.
2475 * Otherwise a negative NFS4ERR value is returned.
2476 */
2477static int nfs41_check_expired_locks(struct nfs4_state *state)
2478{
2479 int status, ret = NFS_OK;
d75a6a0e 2480 struct nfs4_lock_state *lsp, *prev = NULL;
c5896fc8
TM		 2481 struct nfs_server *server = NFS_SERVER(state->inode);
2482
2483 if (!test_bit(LK_STATE_IN_USE, &state->flags))
2484 goto out;
d75a6a0e
BC		 2485
2486 spin_lock(&state->state_lock);
c5896fc8
TM		 2487 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
2488 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
2489 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
2490
d75a6a0e
BC		 2491 atomic_inc(&lsp->ls_count);
2492 spin_unlock(&state->state_lock);
2493
2494 nfs4_put_lock_state(prev);
2495 prev = lsp;
2496
c5896fc8
TM		 2497 status = nfs41_test_and_free_expired_stateid(server,
2498 &lsp->ls_stateid,
2499 cred);
2500 trace_nfs4_test_lock_stateid(state, lsp, status);
2501 if (status == -NFS4ERR_EXPIRED ||
2502 status == -NFS4ERR_BAD_STATEID) {
2503 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
67dd4830 2504 lsp->ls_stateid.type = NFS4_INVALID_STATEID_TYPE;
c5896fc8
TM		 2505 if (!recover_lost_locks)
2506 set_bit(NFS_LOCK_LOST, &lsp->ls_flags);
2507 } else if (status != NFS_OK) {
2508 ret = status;
d75a6a0e
BC		 2509 nfs4_put_lock_state(prev);
2510 goto out;
c5896fc8 2511 }
d75a6a0e 2512 spin_lock(&state->state_lock);
c5896fc8 2513 }
d75a6a0e
BC		 2514 }
2515 spin_unlock(&state->state_lock);
2516 nfs4_put_lock_state(prev);
c5896fc8
TM		 2517out:
2518 return ret;
2519}
2520
3e60ffdd
CL		 2521/**
2522 * nfs41_check_open_stateid - possibly free an open stateid
2523 *
2524 * @state: NFSv4 state for an inode
2525 *
2526 * Returns NFS_OK if recovery for this stateid is now finished.
2527 * Otherwise a negative NFS4ERR value is returned.
2528 */
2529static int nfs41_check_open_stateid(struct nfs4_state *state)
2530{
2531 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 2532 nfs4_stateid *stateid = &state->open_stateid;
ab7cb0df 2533 struct rpc_cred *cred = state->owner->so_cred;
3e60ffdd
CL		 2534 int status;
2535
b134fc4a 2536 if (test_bit(NFS_OPEN_STATE, &state->flags) == 0) {
8a64c4ef
TM		 2537 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) {
2538 if (nfs4_have_delegation(state->inode, state->state))
2539 return NFS_OK;
2540 return -NFS4ERR_OPENMODE;
2541 }
3e60ffdd 2542 return -NFS4ERR_BAD_STATEID;
b134fc4a 2543 }
4586f6e2 2544 status = nfs41_test_and_free_expired_stateid(server, stateid, cred);
08cb47fa 2545 trace_nfs4_test_open_stateid(state, NULL, status);
f7a62ada 2546 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID) {
3e60ffdd
CL		 2547 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2548 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2549 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 2550 clear_bit(NFS_OPEN_STATE, &state->flags);
67dd4830 2551 stateid->type = NFS4_INVALID_STATEID_TYPE;
b01dd1d8 2552 }
8a64c4ef
TM		 2553 if (status != NFS_OK)
2554 return status;
2555 if (nfs_open_stateid_recover_openmode(state))
2556 return -NFS4ERR_OPENMODE;
2557 return NFS_OK;
b01dd1d8
BS		 2558}
2559
2560static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2561{
eb64cf96 2562 int status;
b01dd1d8 2563
0c116cad 2564 nfs41_check_delegation_stateid(state);
c5896fc8
TM		 2565 status = nfs41_check_expired_locks(state);
2566 if (status != NFS_OK)
2567 return status;
3e60ffdd 2568 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 2569 if (status != NFS_OK)
2570 status = nfs4_open_expired(sp, state);
2571 return status;
f062eb6c
BS		 2572}
2573#endif
2574
aa53ed54
JL		 2575/*
2576 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2577 * fields corresponding to attributes that were used to store the verifier.
2578 * Make sure we clobber those fields in the later setattr call
2579 */
5334c5bd
KM		 2580static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata,
2581 struct iattr *sattr, struct nfs4_label **label)
aa53ed54 2582{
5334c5bd
KM		 2583 const u32 *attrset = opendata->o_res.attrset;
2584
2585 if ((attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
aa53ed54
JL		 2586 !(sattr->ia_valid & ATTR_ATIME_SET))
2587 sattr->ia_valid |= ATTR_ATIME;
2588
5334c5bd 2589 if ((attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
aa53ed54
JL		 2590 !(sattr->ia_valid & ATTR_MTIME_SET))
2591 sattr->ia_valid |= ATTR_MTIME;
5334c5bd
KM		 2592
2593 /* Except MODE, it seems harmless of setting twice. */
a430607b
BC		 2594 if (opendata->o_arg.createmode != NFS4_CREATE_EXCLUSIVE &&
2595 attrset[1] & FATTR4_WORD1_MODE)
5334c5bd
KM		 2596 sattr->ia_valid &= ~ATTR_MODE;
2597
2598 if (attrset[2] & FATTR4_WORD2_SECURITY_LABEL)
2599 *label = NULL;
aa53ed54
JL		 2600}
2601
c21443c2
TM		 2602static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2603 fmode_t fmode,
2604 int flags,
3efb9722 2605 struct nfs_open_context *ctx)
c21443c2
TM		 2606{
2607 struct nfs4_state_owner *sp = opendata->owner;
2608 struct nfs_server *server = sp->so_server;
275bb307 2609 struct dentry *dentry;
c21443c2
TM		 2610 struct nfs4_state *state;
2611 unsigned int seq;
2612 int ret;
2613
2614 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2615
2616 ret = _nfs4_proc_open(opendata);
dca78001 2617 if (ret != 0)
c21443c2
TM		 2618 goto out;
2619
2620 state = nfs4_opendata_to_nfs4_state(opendata);
2621 ret = PTR_ERR(state);
2622 if (IS_ERR(state))
2623 goto out;
a974deee 2624 ctx->state = state;
c21443c2
TM		 2625 if (server->caps & NFS_CAP_POSIX_LOCK)
2626 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
a8ce377a
JL		 2627 if (opendata->o_res.rflags & NFS4_OPEN_RESULT_MAY_NOTIFY_LOCK)
2628 set_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags);
c21443c2 2629
275bb307 2630 dentry = opendata->dentry;
2b0143b5 2631 if (d_really_is_negative(dentry)) {
668d0cd5 2632 struct dentry *alias;
275bb307 2633 d_drop(dentry);
668d0cd5
AV		 2634 alias = d_exact_alias(dentry, state->inode);
2635 if (!alias)
2636 alias = d_splice_alias(igrab(state->inode), dentry);
2637 /* d_splice_alias() can't fail here - it's a non-directory */
2638 if (alias) {
275bb307 2639 dput(ctx->dentry);
668d0cd5 2640 ctx->dentry = dentry = alias;
275bb307
TM		 2641 }
2642 nfs_set_verifier(dentry,
2b0143b5 2643 nfs_save_change_attribute(d_inode(opendata->dir)));
275bb307
TM		 2644 }
2645
c21443c2
TM		 2646 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2647 if (ret != 0)
2648 goto out;
2649
2b0143b5 2650 if (d_inode(dentry) == state->inode) {
c45ffdd2
TM		 2651 nfs_inode_attach_open_context(ctx);
2652 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2653 nfs4_schedule_stateid_recovery(server, state);
2654 }
c21443c2
TM		 2655out:
2656 return ret;
2657}
2658
1da177e4 2659/*
24ac23ab 2660 * Returns a referenced nfs4_state
1da177e4 2661 */
82be417a 2662static int _nfs4_do_open(struct inode *dir,
4197a055 2663 struct nfs_open_context *ctx,
82be417a
AA		 2664 int flags,
2665 struct iattr *sattr,
5bc2afc2
TM		 2666 struct nfs4_label *label,
2667 int *opened)
1da177e4
LT		 2668{
2669 struct nfs4_state_owner *sp;
2670 struct nfs4_state *state = NULL;
2671 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 2672 struct nfs4_opendata *opendata;
4197a055
TM		 2673 struct dentry *dentry = ctx->dentry;
2674 struct rpc_cred *cred = ctx->cred;
2675 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2676 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
49f9a0fa 2677 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
1775fd3e 2678 struct nfs4_label *olabel = NULL;
aac00a8d 2679 int status;
1da177e4
LT		 2680
2681 /* Protect against reboot recovery conflicts */
1da177e4 2682 status = -ENOMEM;
d1e284d5
TM		 2683 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2684 if (sp == NULL) {
1da177e4
LT		 2685 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2686 goto out_err;
2687 }
334f87dd 2688 status = nfs4_client_recover_expired_lease(server->nfs_client);
58d9714a 2689 if (status != 0)
b4454fe1 2690 goto err_put_state_owner;
2b0143b5
DH		 2691 if (d_really_is_positive(dentry))
2692 nfs4_return_incompatible_delegation(d_inode(dentry), fmode);
58d9714a 2693 status = -ENOMEM;
2b0143b5 2694 if (d_really_is_positive(dentry))
49f9a0fa 2695 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2696 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
1775fd3e 2697 label, claim, GFP_KERNEL);
e56e0b78 2698 if (opendata == NULL)
95d35cb4 2699 goto err_put_state_owner;
1da177e4 2700
14c43f76
DQ		 2701 if (label) {
2702 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2703 if (IS_ERR(olabel)) {
2704 status = PTR_ERR(olabel);
2705 goto err_opendata_put;
2706 }
2707 }
2708
e911b815
TM		 2709 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2710 if (!opendata->f_attr.mdsthreshold) {
2711 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2712 if (!opendata->f_attr.mdsthreshold)
2713 goto err_free_label;
2714 }
1549210f 2715 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2716 }
2b0143b5
DH		 2717 if (d_really_is_positive(dentry))
2718 opendata->state = nfs4_get_open_state(d_inode(dentry), sp);
aac00a8d 2719
3efb9722 2720 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
6168f62c 2721 if (status != 0)
14c43f76 2722 goto err_free_label;
3efb9722 2723 state = ctx->state;
6168f62c 2724
efcbc04e 2725 if ((opendata->o_arg.open_flags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) &&
549b19cc 2726 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
5334c5bd 2727 nfs4_exclusive_attrset(opendata, sattr, &label);
a1d1c4f1
TM		 2728 /*
2729 * send create attributes which was not set by open
2730 * with an extra setattr.
2731 */
2732 if (sattr->ia_valid & NFS4_VALID_ATTRS) {
2733 nfs_fattr_init(opendata->o_res.f_attr);
2734 status = nfs4_do_setattr(state->inode, cred,
2735 opendata->o_res.f_attr, sattr,
29b59f94 2736 ctx, label, olabel);
a1d1c4f1
TM		 2737 if (status == 0) {
2738 nfs_setattr_update_inode(state->inode, sattr,
2739 opendata->o_res.f_attr);
2740 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
2741 }
1775fd3e 2742 }
0ab64e0e 2743 }
c5c3fb5f 2744 if (opened && opendata->file_created)
5bc2afc2 2745 *opened |= FILE_CREATED;
82be417a 2746
e911b815 2747 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
82be417a 2748 *ctx_th = opendata->f_attr.mdsthreshold;
e911b815
TM		 2749 opendata->f_attr.mdsthreshold = NULL;
2750 }
82be417a 2751
14c43f76
DQ		 2752 nfs4_label_free(olabel);
2753
c6d00e63 2754 nfs4_opendata_put(opendata);
1da177e4 2755 nfs4_put_state_owner(sp);
1da177e4 2756 return 0;
14c43f76
DQ		 2757err_free_label:
2758 nfs4_label_free(olabel);
c6d00e63
TM		 2759err_opendata_put:
2760 nfs4_opendata_put(opendata);
e56e0b78
TM		 2761err_put_state_owner:
2762 nfs4_put_state_owner(sp);
1da177e4 2763out_err:
1da177e4
LT		 2764 return status;
2765}
2766
2767
82be417a 2768static struct nfs4_state *nfs4_do_open(struct inode *dir,
4197a055 2769 struct nfs_open_context *ctx,
82be417a
AA		 2770 int flags,
2771 struct iattr *sattr,
5bc2afc2
TM		 2772 struct nfs4_label *label,
2773 int *opened)
1da177e4 2774{
49f9a0fa 2775 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2776 struct nfs4_exception exception = { };
2777 struct nfs4_state *res;
2778 int status;
2779
2780 do {
5bc2afc2 2781 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
3efb9722 2782 res = ctx->state;
42113a75 2783 trace_nfs4_open_file(ctx, flags, status);
1da177e4
LT		 2784 if (status == 0)
2785 break;
2786 /* NOTE: BAD_SEQID means the server and client disagree about the
2787 * book-keeping w.r.t. state-changing operations
2788 * (OPEN/CLOSE/LOCK/LOCKU...)
2789 * It is actually a sign of a bug on the client or on the server.
2790 *
2791 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2792 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2793 * have unhashed the old state_owner for us, and that we can
2794 * therefore safely retry using a new one. We should still warn
2795 * the user though...
2796 */
2797 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2798 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2799 " returned a bad sequence-id error!\n",
2800 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2801 exception.retry = 1;
2802 continue;
2803 }
550f5747
TM		 2804 /*
2805 * BAD_STATEID on OPEN means that the server cancelled our
2806 * state before it received the OPEN_CONFIRM.
2807 * Recover by retrying the request as per the discussion
2808 * on Page 181 of RFC3530.
2809 */
2810 if (status == -NFS4ERR_BAD_STATEID) {
2811 exception.retry = 1;
2812 continue;
2813 }
aac00a8d
TM		 2814 if (status == -EAGAIN) {
2815 /* We must have found a delegation */
2816 exception.retry = 1;
2817 continue;
2818 }
49f9a0fa
TM		 2819 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2820 continue;
2821 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2822 status, &exception));
2823 } while (exception.retry);
2824 return res;
2825}
2826
8487c479
TM		 2827static int _nfs4_do_setattr(struct inode *inode,
2828 struct nfs_setattrargs *arg,
2829 struct nfs_setattrres *res,
2830 struct rpc_cred *cred,
29b59f94 2831 struct nfs_open_context *ctx)
1da177e4 2832{
3e4f6290 2833 struct nfs_server *server = NFS_SERVER(inode);
d9b67e1e 2834 struct rpc_message msg = {
659bfcd6 2835 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
8487c479
TM		 2836 .rpc_argp = arg,
2837 .rpc_resp = res,
659bfcd6 2838 .rpc_cred = cred,
d9b67e1e 2839 };
abf4e13c 2840 struct rpc_cred *delegation_cred = NULL;
26e976a8 2841 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2842 fmode_t fmode;
2843 bool truncate;
65e4308d 2844 int status;
1da177e4 2845
8487c479 2846 nfs_fattr_init(res->fattr);
1da177e4 2847
ee3ae84e 2848 /* Servers should only apply open mode checks for file size changes */
8487c479 2849 truncate = (arg->iap->ia_valid & ATTR_SIZE) ? true : false;
ee3ae84e
TM		 2850 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2851
8487c479 2852 if (nfs4_copy_delegation_stateid(inode, fmode, &arg->stateid, &delegation_cred)) {
ee3ae84e 2853 /* Use that stateid */
29b59f94 2854 } else if (truncate && ctx != NULL) {
17393475 2855 struct nfs_lock_context *l_ctx;
29b59f94 2856 if (!nfs4_valid_open_stateid(ctx->state))
0418dae1 2857 return -EBADF;
17393475
N		 2858 l_ctx = nfs_get_lock_context(ctx);
2859 if (IS_ERR(l_ctx))
2860 return PTR_ERR(l_ctx);
7a0566b3
N		 2861 status = nfs4_select_rw_stateid(ctx->state, FMODE_WRITE, l_ctx,
2862 &arg->stateid, &delegation_cred);
2863 nfs_put_lock_context(l_ctx);
2864 if (status == -EIO)
0418dae1 2865 return -EBADF;
08e9eac4 2866 } else
8487c479 2867 nfs4_stateid_copy(&arg->stateid, &zero_stateid);
abf4e13c
TM		 2868 if (delegation_cred)
2869 msg.rpc_cred = delegation_cred;
1da177e4 2870
8487c479 2871 status = nfs4_call_sync(server->client, server, &msg, &arg->seq_args, &res->seq_res, 1);
abf4e13c
TM		 2872
2873 put_rpccred(delegation_cred);
29b59f94 2874 if (status == 0 && ctx != NULL)
26e976a8 2875 renew_lease(server, timestamp);
8487c479 2876 trace_nfs4_setattr(inode, &arg->stateid, status);
65e4308d 2877 return status;
1da177e4
LT		 2878}
2879
659bfcd6
TM		 2880static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2881 struct nfs_fattr *fattr, struct iattr *sattr,
29b59f94 2882 struct nfs_open_context *ctx, struct nfs4_label *ilabel,
1775fd3e 2883 struct nfs4_label *olabel)
1da177e4 2884{
3e4f6290 2885 struct nfs_server *server = NFS_SERVER(inode);
29b59f94 2886 struct nfs4_state *state = ctx ? ctx->state : NULL;
d9b67e1e
AS		 2887 struct nfs_setattrargs arg = {
2888 .fh = NFS_FH(inode),
2889 .iap = sattr,
8487c479
TM		 2890 .server = server,
2891 .bitmask = server->attr_bitmask,
2892 .label = ilabel,
d9b67e1e
AS		 2893 };
2894 struct nfs_setattrres res = {
8487c479
TM		 2895 .fattr = fattr,
2896 .label = olabel,
2897 .server = server,
d9b67e1e 2898 };
a1d0b5ee
TM		 2899 struct nfs4_exception exception = {
2900 .state = state,
3114ea7a 2901 .inode = inode,
8487c479 2902 .stateid = &arg.stateid,
a1d0b5ee 2903 };
1da177e4 2904 int err;
8487c479
TM		 2905
2906 arg.bitmask = nfs4_bitmask(server, ilabel);
2907 if (ilabel)
2908 arg.bitmask = nfs4_bitmask(server, olabel);
2909
1da177e4 2910 do {
29b59f94 2911 err = _nfs4_do_setattr(inode, &arg, &res, cred, ctx);
451146be
TM		 2912 switch (err) {
2913 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 2914 if (!(sattr->ia_valid & ATTR_SIZE)) {
2915 pr_warn_once("NFSv4: server %s is incorrectly "
2916 "applying open mode checks to "
2917 "a SETATTR that is not "
2918 "changing file size.\n",
2919 server->nfs_client->cl_hostname);
2920 }
451146be
TM		 2921 if (state && !(state->state & FMODE_WRITE)) {
2922 err = -EBADF;
2923 if (sattr->ia_valid & ATTR_OPEN)
2924 err = -EACCES;
2925 goto out;
2926 }
2927 }
2928 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2929 } while (exception.retry);
451146be 2930out:
1da177e4
LT		 2931 return err;
2932}
2933
500d701f
PT		 2934static bool
2935nfs4_wait_on_layoutreturn(struct inode *inode, struct rpc_task *task)
2936{
2937 if (inode == NULL || !nfs_have_layout(inode))
2938 return false;
2939
2940 return pnfs_wait_on_layoutreturn(inode, task);
2941}
2942
1da177e4
LT		 2943struct nfs4_closedata {
2944 struct inode *inode;
2945 struct nfs4_state *state;
2946 struct nfs_closeargs arg;
2947 struct nfs_closeres res;
cf805165
TM		 2948 struct {
2949 struct nfs4_layoutreturn_args arg;
2950 struct nfs4_layoutreturn_res res;
4d796d75 2951 struct nfs4_xdr_opaque_data ld_private;
cf805165
TM		 2952 u32 roc_barrier;
2953 bool roc;
2954 } lr;
516a6af6 2955 struct nfs_fattr fattr;
26e976a8 2956 unsigned long timestamp;
1da177e4
LT		 2957};
2958
963d8fe5 2959static void nfs4_free_closedata(void *data)
9512135d 2960{
963d8fe5
TM		 2961 struct nfs4_closedata *calldata = data;
2962 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2963 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2964
cf805165 2965 if (calldata->lr.roc)
1c5bd76d
TM		 2966 pnfs_roc_release(&calldata->lr.arg, &calldata->lr.res,
2967 calldata->res.lr_ret);
9512135d
TM		 2968 nfs4_put_open_state(calldata->state);
2969 nfs_free_seqid(calldata->arg.seqid);
9512135d 2970 nfs4_put_state_owner(sp);
322b2b90 2971 nfs_sb_deactive(sb);
9512135d
TM		 2972 kfree(calldata);
2973}
2974
963d8fe5 2975static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2976{
963d8fe5 2977 struct nfs4_closedata *calldata = data;
1da177e4 2978 struct nfs4_state *state = calldata->state;
1da177e4 2979 struct nfs_server *server = NFS_SERVER(calldata->inode);
412f6c4c 2980 nfs4_stateid *res_stateid = NULL;
1da177e4 2981
a3ca5651 2982 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2983 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2984 return;
42113a75 2985 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
cf805165
TM		 2986
2987 /* Handle Layoutreturn errors */
2988 if (calldata->arg.lr_args && task->tk_status != 0) {
2989 switch (calldata->res.lr_ret) {
2990 default:
2991 calldata->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
2992 break;
2993 case 0:
2994 calldata->arg.lr_args = NULL;
2995 calldata->res.lr_res = NULL;
2996 break;
2997 case -NFS4ERR_ADMIN_REVOKED:
2998 case -NFS4ERR_DELEG_REVOKED:
2999 case -NFS4ERR_EXPIRED:
3000 case -NFS4ERR_BAD_STATEID:
3001 case -NFS4ERR_OLD_STATEID:
3002 case -NFS4ERR_UNKNOWN_LAYOUTTYPE:
3003 case -NFS4ERR_WRONG_CRED:
3004 calldata->arg.lr_args = NULL;
3005 calldata->res.lr_res = NULL;
3006 calldata->res.lr_ret = 0;
3007 rpc_restart_call_prepare(task);
3008 return;
3009 }
3010 }
3011
d9b67e1e 3012 /* hmm. we are done with the inode, and in the process of freeing
1da177e4
LT		 3013 * the state_owner. we keep this around to process errors
3014 */
1da177e4
LT		 3015 switch (task->tk_status) {
3016 case 0:
412f6c4c 3017 res_stateid = &calldata->res.stateid;
26e976a8 3018 renew_lease(server, calldata->timestamp);
412f6c4c 3019 break;
f07d4a31
TM		 3020 case -NFS4ERR_ACCESS:
3021 if (calldata->arg.bitmask != NULL) {
3022 calldata->arg.bitmask = NULL;
3023 calldata->res.fattr = NULL;
3024 task->tk_status = 0;
3025 rpc_restart_call_prepare(task);
3026 goto out_release;
3027
3028 }
3029 break;
69794ad7 3030 case -NFS4ERR_ADMIN_REVOKED:
1da177e4 3031 case -NFS4ERR_STALE_STATEID:
26d36301
TM		 3032 case -NFS4ERR_EXPIRED:
3033 nfs4_free_revoked_stateid(server,
3034 &calldata->arg.stateid,
3035 task->tk_msg.rpc_cred);
9e33bed5
TM		 3036 case -NFS4ERR_OLD_STATEID:
3037 case -NFS4ERR_BAD_STATEID:
566fcec6 3038 if (!nfs4_stateid_match(&calldata->arg.stateid,
369d6b7f 3039 &state->open_stateid)) {
566fcec6
TM		 3040 rpc_restart_call_prepare(task);
3041 goto out_release;
3042 }
dc0b027d 3043 if (calldata->arg.fmode == 0)
9e33bed5 3044 break;
1da177e4 3045 default:
8478eaa1 3046 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN) {
72211dbe 3047 rpc_restart_call_prepare(task);
69794ad7
TM		 3048 goto out_release;
3049 }
1da177e4 3050 }
4a1e2feb
TM		 3051 nfs_clear_open_stateid(state, &calldata->arg.stateid,
3052 res_stateid, calldata->arg.fmode);
69794ad7 3053out_release:
72211dbe 3054 nfs_release_seqid(calldata->arg.seqid);
d8d84983 3055 nfs_refresh_inode(calldata->inode, &calldata->fattr);
a3ca5651 3056 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 3057}
3058
4ce70ada 3059static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 3060{
4ce70ada 3061 struct nfs4_closedata *calldata = data;
9512135d 3062 struct nfs4_state *state = calldata->state;
7fdab069 3063 struct inode *inode = calldata->inode;
aee7af35 3064 bool is_rdonly, is_wronly, is_rdwr;
88069f77 3065 int call_close = 0;
9512135d 3066
a3ca5651 3067 dprintk("%s: begin!\n", __func__);
963d8fe5 3068 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 3069 goto out_wait;
003707c7 3070
88069f77 3071 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
4cecb76f 3072 spin_lock(&state->owner->so_lock);
aee7af35
TM		 3073 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
3074 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
3075 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
369d6b7f 3076 nfs4_stateid_copy(&calldata->arg.stateid, &state->open_stateid);
003707c7 3077 /* Calculate the change in open mode */
cd9288ff 3078 calldata->arg.fmode = 0;
e7616923 3079 if (state->n_rdwr == 0) {
cd9288ff
TM		 3080 if (state->n_rdonly == 0)
3081 call_close |= is_rdonly;
3082 else if (is_rdonly)
3083 calldata->arg.fmode |= FMODE_READ;
3084 if (state->n_wronly == 0)
3085 call_close |= is_wronly;
3086 else if (is_wronly)
3087 calldata->arg.fmode |= FMODE_WRITE;
e547f262
TM		 3088 if (calldata->arg.fmode != (FMODE_READ|FMODE_WRITE))
3089 call_close |= is_rdwr;
cd9288ff
TM		 3090 } else if (is_rdwr)
3091 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
3092
5cc7861e
TM		 3093 if (!nfs4_valid_open_stateid(state) ||
3094 test_bit(NFS_OPEN_STATE, &state->flags) == 0)
5d422301 3095 call_close = 0;
4cecb76f 3096 spin_unlock(&state->owner->so_lock);
88069f77
TM		 3097
3098 if (!call_close) {
963d8fe5 3099 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 3100 goto out_no_action;
9512135d 3101 }
88069f77 3102
1c5bd76d 3103 if (!calldata->lr.roc && nfs4_wait_on_layoutreturn(inode, task)) {
500d701f
PT		 3104 nfs_release_seqid(calldata->arg.seqid);
3105 goto out_wait;
3106 }
3107
9413a1a1 3108 if (calldata->arg.fmode == 0)
88069f77 3109 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
3ecefc92 3110
9413a1a1 3111 if (calldata->arg.fmode == 0 || calldata->arg.fmode == FMODE_READ) {
3ecefc92
TM		 3112 /* Close-to-open cache consistency revalidation */
3113 if (!nfs4_have_delegation(inode, FMODE_READ))
3114 calldata->arg.bitmask = NFS_SERVER(inode)->cache_consistency_bitmask;
3115 else
3116 calldata->arg.bitmask = NULL;
3117 }
3c13cb5b 3118
6ae37339
TM		 3119 calldata->arg.share_access =
3120 nfs4_map_atomic_open_share(NFS_SERVER(inode),
3121 calldata->arg.fmode, 0);
88069f77 3122
d8d84983
TM		 3123 if (calldata->res.fattr == NULL)
3124 calldata->arg.bitmask = NULL;
3125 else if (calldata->arg.bitmask == NULL)
3126 calldata->res.fattr = NULL;
26e976a8 3127 calldata->timestamp = jiffies;
42e1cca7 3128 if (nfs4_setup_sequence(NFS_SERVER(inode)->nfs_client,
9d12b216
TM		 3129 &calldata->arg.seq_args,
3130 &calldata->res.seq_res,
2240a9e2
TM		 3131 task) != 0)
3132 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 3133 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 3134 return;
3135out_no_action:
3136 task->tk_action = NULL;
3137out_wait:
3138 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 3139}
3140
963d8fe5 3141static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 3142 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 3143 .rpc_call_done = nfs4_close_done,
3144 .rpc_release = nfs4_free_closedata,
3145};
3146
1da177e4
LT		 3147/*
3148 * It is possible for data to be read/written from a mem-mapped file
3149 * after the sys_close call (which hits the vfs layer as a flush).
3150 * This means that we can't safely call nfsv4 close on a file until
3151 * the inode is cleared. This in turn means that we are not good
3152 * NFSv4 citizens - we do not indicate to the server to update the file's
3153 * share state even when we are done with one of the three share
3154 * stateid's in the inode.
3155 *
3156 * NOTE: Caller must be holding the sp->so_owner semaphore!
3157 */
1f7977c1 3158int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 3159{
4a35bd41 3160 struct nfs_server *server = NFS_SERVER(state->inode);
63f5f796 3161 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
1da177e4 3162 struct nfs4_closedata *calldata;
b39e625b
TM		 3163 struct nfs4_state_owner *sp = state->owner;
3164 struct rpc_task *task;
5138fde0
TM		 3165 struct rpc_message msg = {
3166 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
3167 .rpc_cred = state->owner->so_cred,
3168 };
c970aa85
TM		 3169 struct rpc_task_setup task_setup_data = {
3170 .rpc_client = server->client,
5138fde0 3171 .rpc_message = &msg,
c970aa85 3172 .callback_ops = &nfs4_close_ops,
101070ca 3173 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3174 .flags = RPC_TASK_ASYNC,
3175 };
9512135d 3176 int status = -ENOMEM;
1da177e4 3177
fa940720
WAA		 3178 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
3179 &task_setup_data.rpc_client, &msg);
3180
8535b2be 3181 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 3182 if (calldata == NULL)
9512135d 3183 goto out;
a9c92d6b 3184 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 3185 calldata->inode = state->inode;
1da177e4 3186 calldata->state = state;
4a35bd41 3187 calldata->arg.fh = NFS_FH(state->inode);
1da177e4 3188 /* Serialization for the sequence id */
63f5f796
TM		 3189 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
3190 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask);
badc76dd 3191 if (IS_ERR(calldata->arg.seqid))
9512135d 3192 goto out_free_calldata;
d8d84983 3193 nfs_fattr_init(&calldata->fattr);
dc0b027d 3194 calldata->arg.fmode = 0;
4d796d75 3195 calldata->lr.arg.ld_private = &calldata->lr.ld_private;
516a6af6 3196 calldata->res.fattr = &calldata->fattr;
c1d51931 3197 calldata->res.seqid = calldata->arg.seqid;
516a6af6 3198 calldata->res.server = server;
cf805165 3199 calldata->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
1c5bd76d
TM		 3200 calldata->lr.roc = pnfs_roc(state->inode,
3201 &calldata->lr.arg, &calldata->lr.res, msg.rpc_cred);
3202 if (calldata->lr.roc) {
3203 calldata->arg.lr_args = &calldata->lr.arg;
3204 calldata->res.lr_res = &calldata->lr.res;
3205 }
643168c2 3206 nfs_sb_active(calldata->inode->i_sb);
9512135d 3207
1174dd1f
TM		 3208 msg.rpc_argp = &calldata->arg;
3209 msg.rpc_resp = &calldata->res;
c970aa85
TM		 3210 task_setup_data.callback_data = calldata;
3211 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 3212 if (IS_ERR(task))
3213 return PTR_ERR(task);
a49c3c77
TM		 3214 status = 0;
3215 if (wait)
3216 status = rpc_wait_for_completion_task(task);
b39e625b 3217 rpc_put_task(task);
a49c3c77 3218 return status;
9512135d
TM		 3219out_free_calldata:
3220 kfree(calldata);
3221out:
b39e625b
TM		 3222 nfs4_put_open_state(state);
3223 nfs4_put_state_owner(sp);
9512135d 3224 return status;
1da177e4
LT		 3225}
3226
2b484297 3227static struct inode *
5bc2afc2
TM		 3228nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
3229 int open_flags, struct iattr *attr, int *opened)
1da177e4 3230{
1da177e4 3231 struct nfs4_state *state;
aa9c2669
DQ		 3232 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
3233
3234 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
1da177e4 3235
565277f6 3236 /* Protect against concurrent sillydeletes */
5bc2afc2 3237 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
aa9c2669
DQ		 3238
3239 nfs4_label_release_security(label);
3240
f46e0bd3
TM		 3241 if (IS_ERR(state))
3242 return ERR_CAST(state);
275bb307 3243 return state->inode;
1da177e4
LT		 3244}
3245
1185a552 3246static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 3247{
3248 if (ctx->state == NULL)
3249 return;
3250 if (is_sync)
643168c2 3251 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 3252 else
643168c2 3253 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 3254}
1da177e4 3255
b944dba3
TM		 3256#define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
3257#define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
dff25ddb 3258#define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_MODE_UMASK - 1UL)
b944dba3 3259
1da177e4
LT		 3260static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
3261{
8c61282f 3262 u32 bitmask[3] = {}, minorversion = server->nfs_client->cl_minorversion;
43652ad5
BH		 3263 struct nfs4_server_caps_arg args = {
3264 .fhandle = fhandle,
8c61282f 3265 .bitmask = bitmask,
43652ad5 3266 };
1da177e4
LT		 3267 struct nfs4_server_caps_res res = {};
3268 struct rpc_message msg = {
3269 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 3270 .rpc_argp = &args,
1da177e4
LT		 3271 .rpc_resp = &res,
3272 };
3273 int status;
f4b23de3 3274 int i;
1da177e4 3275
8c61282f
KM		 3276 bitmask[0] = FATTR4_WORD0_SUPPORTED_ATTRS |
3277 FATTR4_WORD0_FH_EXPIRE_TYPE |
3278 FATTR4_WORD0_LINK_SUPPORT |
3279 FATTR4_WORD0_SYMLINK_SUPPORT |
3280 FATTR4_WORD0_ACLSUPPORT;
3281 if (minorversion)
3282 bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3283
7c513058 3284 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3285 if (status == 0) {
b944dba3 3286 /* Sanity check the server answers */
8c61282f 3287 switch (minorversion) {
b944dba3
TM		 3288 case 0:
3289 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
3290 res.attr_bitmask[2] = 0;
3291 break;
3292 case 1:
3293 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
3294 break;
3295 case 2:
3296 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
3297 }
1da177e4 3298 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 3299 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
3300 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
3301 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
3302 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
b944dba3
TM		 3303 NFS_CAP_CTIME|NFS_CAP_MTIME|
3304 NFS_CAP_SECURITY_LABEL);
7dd7d959
MN		 3305 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
3306 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
1da177e4
LT		 3307 server->caps |= NFS_CAP_ACLS;
3308 if (res.has_links != 0)
3309 server->caps |= NFS_CAP_HARDLINKS;
3310 if (res.has_symlinks != 0)
3311 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 3312 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
3313 server->caps |= NFS_CAP_FILEID;
3314 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
3315 server->caps |= NFS_CAP_MODE;
3316 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
3317 server->caps |= NFS_CAP_NLINK;
3318 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
3319 server->caps |= NFS_CAP_OWNER;
3320 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
3321 server->caps |= NFS_CAP_OWNER_GROUP;
3322 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
3323 server->caps |= NFS_CAP_ATIME;
3324 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
3325 server->caps |= NFS_CAP_CTIME;
3326 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
3327 server->caps |= NFS_CAP_MTIME;
aa9c2669
DQ		 3328#ifdef CONFIG_NFS_V4_SECURITY_LABEL
3329 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
3330 server->caps |= NFS_CAP_SECURITY_LABEL;
3331#endif
3332 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
3333 sizeof(server->attr_bitmask));
b944dba3 3334 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
62ab460c 3335
a65318bf
TM		 3336 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
3337 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
3338 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
b944dba3 3339 server->cache_consistency_bitmask[2] = 0;
f4b23de3
TM		 3340
3341 /* Avoid a regression due to buggy server */
3342 for (i = 0; i < ARRAY_SIZE(res.exclcreat_bitmask); i++)
3343 res.exclcreat_bitmask[i] &= res.attr_bitmask[i];
8c61282f
KM		 3344 memcpy(server->exclcreat_bitmask, res.exclcreat_bitmask,
3345 sizeof(server->exclcreat_bitmask));
f4b23de3 3346
1da177e4 3347 server->acl_bitmask = res.acl_bitmask;
264e6351 3348 server->fh_expire_type = res.fh_expire_type;
1da177e4 3349 }
cccef3b9 3350
1da177e4
LT		 3351 return status;
3352}
3353
55a97593 3354int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 3355{
3356 struct nfs4_exception exception = { };
3357 int err;
3358 do {
3359 err = nfs4_handle_exception(server,
3360 _nfs4_server_capabilities(server, fhandle),
3361 &exception);
3362 } while (exception.retry);
3363 return err;
3364}
3365
3366static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3367 struct nfs_fsinfo *info)
3368{
aa9c2669 3369 u32 bitmask[3];
1da177e4 3370 struct nfs4_lookup_root_arg args = {
aa9c2669 3371 .bitmask = bitmask,
1da177e4
LT		 3372 };
3373 struct nfs4_lookup_res res = {
3374 .server = server,
0e574af1 3375 .fattr = info->fattr,
1da177e4
LT		 3376 .fh = fhandle,
3377 };
3378 struct rpc_message msg = {
3379 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
3380 .rpc_argp = &args,
3381 .rpc_resp = &res,
3382 };
008f55d0 3383
aa9c2669
DQ		 3384 bitmask[0] = nfs4_fattr_bitmap[0];
3385 bitmask[1] = nfs4_fattr_bitmap[1];
3386 /*
3387 * Process the label in the upcoming getfattr
3388 */
3389 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
3390
0e574af1 3391 nfs_fattr_init(info->fattr);
7c513058 3392 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3393}
3394
3395static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3396 struct nfs_fsinfo *info)
3397{
3398 struct nfs4_exception exception = { };
3399 int err;
3400 do {
fb8a5ba8 3401 err = _nfs4_lookup_root(server, fhandle, info);
b5f875a9 3402 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
fb8a5ba8
BS		 3403 switch (err) {
3404 case 0:
3405 case -NFS4ERR_WRONGSEC:
05e9cfb4 3406 goto out;
fb8a5ba8
BS		 3407 default:
3408 err = nfs4_handle_exception(server, err, &exception);
3409 }
1da177e4 3410 } while (exception.retry);
05e9cfb4 3411out:
1da177e4
LT		 3412 return err;
3413}
3414
8f70e95f
BS		 3415static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3416 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
3417{
c2190661
TM		 3418 struct rpc_auth_create_args auth_args = {
3419 .pseudoflavor = flavor,
3420 };
8f70e95f 3421 struct rpc_auth *auth;
8f70e95f 3422
c2190661 3423 auth = rpcauth_create(&auth_args, server->client);
9df1336c
AS		 3424 if (IS_ERR(auth))
3425 return -EACCES;
3426 return nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 3427}
3428
9a744ba3
CL		 3429/*
3430 * Retry pseudoroot lookup with various security flavors. We do this when:
3431 *
3432 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
3433 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
3434 *
3435 * Returns zero on success, or a negative NFS4ERR value, or a
3436 * negative errno value.
3437 */
801a16dc 3438static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 3439 struct nfs_fsinfo *info)
1da177e4 3440{
9a744ba3
CL		 3441 /* Per 3530bis 15.33.5 */
3442 static const rpc_authflavor_t flav_array[] = {
3443 RPC_AUTH_GSS_KRB5P,
3444 RPC_AUTH_GSS_KRB5I,
3445 RPC_AUTH_GSS_KRB5,
c4eafe11 3446 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 3447 RPC_AUTH_NULL,
3448 };
3449 int status = -EPERM;
3450 size_t i;
6a1a1e34 3451
4d4b69dd
WAA		 3452 if (server->auth_info.flavor_len > 0) {
3453 /* try each flavor specified by user */
3454 for (i = 0; i < server->auth_info.flavor_len; i++) {
3455 status = nfs4_lookup_root_sec(server, fhandle, info,
3456 server->auth_info.flavors[i]);
3457 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3458 continue;
3459 break;
3460 }
3461 } else {
3462 /* no flavors specified by user, try default list */
3463 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3464 status = nfs4_lookup_root_sec(server, fhandle, info,
3465 flav_array[i]);
3466 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3467 continue;
3468 break;
3469 }
8f70e95f 3470 }
9a744ba3 3471
fb8a5ba8
BS		 3472 /*
3473 * -EACCESS could mean that the user doesn't have correct permissions
3474 * to access the mount. It could also mean that we tried to mount
3475 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
3476 * existing mount programs don't handle -EACCES very well so it should
3477 * be mapped to -EPERM instead.
3478 */
3479 if (status == -EACCES)
3480 status = -EPERM;
801a16dc
BS		 3481 return status;
3482}
3483
2ed4b95b
CL		 3484/**
3485 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
3486 * @server: initialized nfs_server handle
3487 * @fhandle: we fill in the pseudo-fs root file handle
3488 * @info: we fill in an FSINFO struct
5e6b1990 3489 * @auth_probe: probe the auth flavours
2ed4b95b
CL		 3490 *
3491 * Returns zero on success, or a negative errno.
801a16dc 3492 */
3028eb2b 3493int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
5e6b1990
TM		 3494 struct nfs_fsinfo *info,
3495 bool auth_probe)
801a16dc 3496{
c7757074 3497 int status = 0;
2ed4b95b 3498
c7757074 3499 if (!auth_probe)
5e6b1990 3500 status = nfs4_lookup_root(server, fhandle, info);
c7757074
AP		 3501
3502 if (auth_probe || status == NFS4ERR_WRONGSEC)
698c937b
TM		 3503 status = server->nfs_client->cl_mvops->find_root_sec(server,
3504 fhandle, info);
2ed4b95b 3505
1da177e4
LT		 3506 if (status == 0)
3507 status = nfs4_server_capabilities(server, fhandle);
3508 if (status == 0)
3509 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 3510
c12e87f4 3511 return nfs4_map_errors(status);
1da177e4
LT		 3512}
3513
bae36241
BS		 3514static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3515 struct nfs_fsinfo *info)
3516{
3517 int error;
3518 struct nfs_fattr *fattr = info->fattr;
1775fd3e 3519 struct nfs4_label *label = NULL;
bae36241
BS		 3520
3521 error = nfs4_server_capabilities(server, mntfh);
3522 if (error < 0) {
3523 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3524 return error;
3525 }
3526
14c43f76
DQ		 3527 label = nfs4_label_alloc(server, GFP_KERNEL);
3528 if (IS_ERR(label))
3529 return PTR_ERR(label);
3530
1775fd3e 3531 error = nfs4_proc_getattr(server, mntfh, fattr, label);
bae36241
BS		 3532 if (error < 0) {
3533 dprintk("nfs4_get_root: getattr error = %d\n", -error);
14c43f76 3534 goto err_free_label;
bae36241
BS		 3535 }
3536
3537 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3538 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3539 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3540
14c43f76
DQ		 3541err_free_label:
3542 nfs4_label_free(label);
3543
bae36241
BS		 3544 return error;
3545}
3546
6b97fd3d
MN		 3547/*
3548 * Get locations and (maybe) other attributes of a referral.
3549 * Note that we'll actually follow the referral later when
3550 * we detect fsid mismatch in inode revalidation
3551 */
f05d147f
BS		 3552static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3553 const struct qstr *name, struct nfs_fattr *fattr,
3554 struct nfs_fh *fhandle)
6b97fd3d
MN		 3555{
3556 int status = -ENOMEM;
3557 struct page *page = NULL;
3558 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 3559
3560 page = alloc_page(GFP_KERNEL);
3561 if (page == NULL)
3562 goto out;
3563 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3564 if (locations == NULL)
3565 goto out;
3566
f05d147f 3567 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 3568 if (status != 0)
3569 goto out;
519ae255
CL		 3570
3571 /*
3572 * If the fsid didn't change, this is a migration event, not a
3573 * referral. Cause us to drop into the exception handler, which
3574 * will kick off migration recovery.
3575 */
6b97fd3d 3576 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 3577 dprintk("%s: server did not return a different fsid for"
3578 " a referral at %s\n", __func__, name->name);
519ae255 3579 status = -NFS4ERR_MOVED;
6b97fd3d
MN		 3580 goto out;
3581 }
533eb461
AA		 3582 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3583 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 3584
533eb461 3585 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 3586 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 3587 memset(fhandle, 0, sizeof(struct nfs_fh));
3588out:
3589 if (page)
3590 __free_page(page);
5d7ca35a 3591 kfree(locations);
6b97fd3d
MN		 3592 return status;
3593}
3594
1775fd3e
DQ		 3595static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3596 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3597{
3598 struct nfs4_getattr_arg args = {
3599 .fh = fhandle,
3600 .bitmask = server->attr_bitmask,
3601 };
3602 struct nfs4_getattr_res res = {
3603 .fattr = fattr,
1775fd3e 3604 .label = label,
1da177e4
LT		 3605 .server = server,
3606 };
3607 struct rpc_message msg = {
3608 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3609 .rpc_argp = &args,
3610 .rpc_resp = &res,
3611 };
aa9c2669
DQ		 3612
3613 args.bitmask = nfs4_bitmask(server, label);
3614
0e574af1 3615 nfs_fattr_init(fattr);
7c513058 3616 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3617}
3618
1775fd3e
DQ		 3619static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3620 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3621{
3622 struct nfs4_exception exception = { };
3623 int err;
3624 do {
b5f875a9
TM		 3625 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3626 trace_nfs4_getattr(server, fhandle, fattr, err);
3627 err = nfs4_handle_exception(server, err,
1da177e4
LT		 3628 &exception);
3629 } while (exception.retry);
3630 return err;
3631}
3632
3633/*
3634 * The file is not closed if it is opened due to the a request to change
3635 * the size of the file. The open call will not be needed once the
3636 * VFS layer lookup-intents are implemented.
3637 *
3638 * Close is called when the inode is destroyed.
3639 * If we haven't opened the file for O_WRONLY, we
3640 * need to in the size_change case to obtain a stateid.
3641 *
3642 * Got race?
3643 * Because OPEN is always done by name in nfsv4, it is
3644 * possible that we opened a different file by the same
3645 * name. We can recognize this race condition, but we
3646 * can't do anything about it besides returning an error.
3647 *
3648 * This will be fixed with VFS changes (lookup-intent).
3649 */
3650static int
3651nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3652 struct iattr *sattr)
3653{
2b0143b5 3654 struct inode *inode = d_inode(dentry);
659bfcd6 3655 struct rpc_cred *cred = NULL;
29b59f94 3656 struct nfs_open_context *ctx = NULL;
14c43f76 3657 struct nfs4_label *label = NULL;
1da177e4
LT		 3658 int status;
3659
88ac815c
PT		 3660 if (pnfs_ld_layoutret_on_setattr(inode) &&
3661 sattr->ia_valid & ATTR_SIZE &&
3662 sattr->ia_size < i_size_read(inode))
24028672 3663 pnfs_commit_and_return_layout(inode);
8a1636c4 3664
0e574af1 3665 nfs_fattr_init(fattr);
1da177e4 3666
2669940d
AA		 3667 /* Deal with open(O_TRUNC) */
3668 if (sattr->ia_valid & ATTR_OPEN)
cc7936f9 3669 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2669940d
AA		 3670
3671 /* Optimization: if the end result is no change, don't RPC */
cc7936f9 3672 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2669940d
AA		 3673 return 0;
3674
d530838b 3675 /* Search for an existing open(O_WRITE) file */
659bfcd6 3676 if (sattr->ia_valid & ATTR_FILE) {
659bfcd6
TM		 3677
3678 ctx = nfs_file_open_context(sattr->ia_file);
29b59f94 3679 if (ctx)
504e5189 3680 cred = ctx->cred;
659bfcd6 3681 }
08e9eac4 3682
14c43f76
DQ		 3683 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3684 if (IS_ERR(label))
3685 return PTR_ERR(label);
3686
29b59f94 3687 status = nfs4_do_setattr(inode, cred, fattr, sattr, ctx, NULL, label);
aa9c2669 3688 if (status == 0) {
f044636d 3689 nfs_setattr_update_inode(inode, sattr, fattr);
aa9c2669
DQ		 3690 nfs_setsecurity(inode, fattr, label);
3691 }
14c43f76 3692 nfs4_label_free(label);
1da177e4
LT		 3693 return status;
3694}
3695
0c2e53f1
TM		 3696static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3697 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3698 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 3699{
0c2e53f1 3700 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 3701 int status;
3702 struct nfs4_lookup_arg args = {
3703 .bitmask = server->attr_bitmask,
0c2e53f1 3704 .dir_fh = NFS_FH(dir),
2b3de441
DH		 3705 .name = name,
3706 };
3707 struct nfs4_lookup_res res = {
3708 .server = server,
3709 .fattr = fattr,
aa9c2669 3710 .label = label,
2b3de441
DH		 3711 .fh = fhandle,
3712 };
3713 struct rpc_message msg = {
3714 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3715 .rpc_argp = &args,
3716 .rpc_resp = &res,
3717 };
3718
aa9c2669
DQ		 3719 args.bitmask = nfs4_bitmask(server, label);
3720
2b3de441
DH		 3721 nfs_fattr_init(fattr);
3722
1da177e4 3723 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 3724 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3725 dprintk("NFS reply lookup: %d\n", status);
3726 return status;
3727}
3728
72de53ec 3729static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 3730{
7ebb9315 3731 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 3732 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 3733 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3734 fattr->nlink = 2;
3735}
3736
72de53ec 3737static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
beffb8fe 3738 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3739 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3740{
3741 struct nfs4_exception exception = { };
72de53ec 3742 struct rpc_clnt *client = *clnt;
1da177e4
LT		 3743 int err;
3744 do {
1775fd3e 3745 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
078ea3df 3746 trace_nfs4_lookup(dir, name, err);
72de53ec 3747 switch (err) {
08ef7bd3 3748 case -NFS4ERR_BADNAME:
72de53ec
BS		 3749 err = -ENOENT;
3750 goto out;
0c2e53f1 3751 case -NFS4ERR_MOVED:
f05d147f 3752 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
c86c90c6
DM		 3753 if (err == -NFS4ERR_MOVED)
3754 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
72de53ec 3755 goto out;
0c2e53f1 3756 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 3757 err = -EPERM;
3758 if (client != *clnt)
3759 goto out;
66b06860 3760 client = nfs4_negotiate_security(client, dir, name);
72de53ec
BS		 3761 if (IS_ERR(client))
3762 return PTR_ERR(client);
3763
3764 exception.retry = 1;
3765 break;
3766 default:
3767 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 3768 }
1da177e4 3769 } while (exception.retry);
72de53ec
BS		 3770
3771out:
3772 if (err == 0)
3773 *clnt = client;
3774 else if (client != *clnt)
3775 rpc_shutdown_client(client);
3776
1da177e4
LT		 3777 return err;
3778}
3779
beffb8fe 3780static int nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1775fd3e
DQ		 3781 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3782 struct nfs4_label *label)
72de53ec
BS		 3783{
3784 int status;
3785 struct rpc_clnt *client = NFS_CLIENT(dir);
3786
1775fd3e 3787 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
72de53ec
BS		 3788 if (client != NFS_CLIENT(dir)) {
3789 rpc_shutdown_client(client);
3790 nfs_fixup_secinfo_attributes(fattr);
3791 }
3792 return status;
3793}
3794
f05d147f 3795struct rpc_clnt *
beffb8fe 3796nfs4_proc_lookup_mountpoint(struct inode *dir, const struct qstr *name,
f05d147f
BS		 3797 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3798{
b72888cb 3799 struct rpc_clnt *client = NFS_CLIENT(dir);
f05d147f 3800 int status;
f05d147f 3801
1775fd3e 3802 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
b72888cb 3803 if (status < 0)
f05d147f 3804 return ERR_PTR(status);
b72888cb 3805 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
f05d147f
BS		 3806}
3807
5b5faaf6
JL		 3808static int _nfs4_proc_lookupp(struct inode *inode,
3809 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3810 struct nfs4_label *label)
3811{
3812 struct rpc_clnt *clnt = NFS_CLIENT(inode);
3813 struct nfs_server *server = NFS_SERVER(inode);
3814 int status;
3815 struct nfs4_lookupp_arg args = {
3816 .bitmask = server->attr_bitmask,
3817 .fh = NFS_FH(inode),
3818 };
3819 struct nfs4_lookupp_res res = {
3820 .server = server,
3821 .fattr = fattr,
3822 .label = label,
3823 .fh = fhandle,
3824 };
3825 struct rpc_message msg = {
3826 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUPP],
3827 .rpc_argp = &args,
3828 .rpc_resp = &res,
3829 };
3830
3831 args.bitmask = nfs4_bitmask(server, label);
3832
3833 nfs_fattr_init(fattr);
3834
3835 dprintk("NFS call lookupp ino=0x%lx\n", inode->i_ino);
3836 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
3837 &res.seq_res, 0);
3838 dprintk("NFS reply lookupp: %d\n", status);
3839 return status;
3840}
3841
3842static int nfs4_proc_lookupp(struct inode *inode, struct nfs_fh *fhandle,
3843 struct nfs_fattr *fattr, struct nfs4_label *label)
3844{
3845 struct nfs4_exception exception = { };
3846 int err;
3847 do {
3848 err = _nfs4_proc_lookupp(inode, fhandle, fattr, label);
3849 trace_nfs4_lookupp(inode, err);
3850 err = nfs4_handle_exception(NFS_SERVER(inode), err,
3851 &exception);
3852 } while (exception.retry);
3853 return err;
3854}
3855
1da177e4
LT		 3856static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3857{
76b32999 3858 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3859 struct nfs4_accessargs args = {
3860 .fh = NFS_FH(inode),
a4980e78 3861 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 3862 };
3863 struct nfs4_accessres res = {
3864 .server = server,
1da177e4 3865 };
1da177e4
LT		 3866 struct rpc_message msg = {
3867 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3868 .rpc_argp = &args,
3869 .rpc_resp = &res,
3870 .rpc_cred = entry->cred,
3871 };
3872 int mode = entry->mask;
aa9c2669 3873 int status = 0;
1da177e4
LT		 3874
3875 /*
3876 * Determine which access bits we want to ask for...
3877 */
3878 if (mode & MAY_READ)
3879 args.access |= NFS4_ACCESS_READ;
3880 if (S_ISDIR(inode->i_mode)) {
3881 if (mode & MAY_WRITE)
3882 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3883 if (mode & MAY_EXEC)
3884 args.access |= NFS4_ACCESS_LOOKUP;
3885 } else {
3886 if (mode & MAY_WRITE)
3887 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3888 if (mode & MAY_EXEC)
3889 args.access |= NFS4_ACCESS_EXECUTE;
3890 }
c407d41a
TM		 3891
3892 res.fattr = nfs_alloc_fattr();
3893 if (res.fattr == NULL)
3894 return -ENOMEM;
3895
7c513058 3896 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3897 if (!status) {
6168f62c 3898 nfs_access_set_mask(entry, res.access);
c407d41a 3899 nfs_refresh_inode(inode, res.fattr);
1da177e4 3900 }
c407d41a 3901 nfs_free_fattr(res.fattr);
1da177e4
LT		 3902 return status;
3903}
3904
3905static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3906{
3907 struct nfs4_exception exception = { };
3908 int err;
3909 do {
c1578b76
TM		 3910 err = _nfs4_proc_access(inode, entry);
3911 trace_nfs4_access(inode, err);
3912 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3913 &exception);
3914 } while (exception.retry);
3915 return err;
3916}
3917
3918/*
3919 * TODO: For the time being, we don't try to get any attributes
3920 * along with any of the zero-copy operations READ, READDIR,
3921 * READLINK, WRITE.
3922 *
3923 * In the case of the first three, we want to put the GETATTR
3924 * after the read-type operation -- this is because it is hard
3925 * to predict the length of a GETATTR response in v4, and thus
3926 * align the READ data correctly. This means that the GETATTR
3927 * may end up partially falling into the page cache, and we should
3928 * shift it into the 'tail' of the xdr_buf before processing.
3929 * To do this efficiently, we need to know the total length
3930 * of data received, which doesn't seem to be available outside
3931 * of the RPC layer.
3932 *
3933 * In the case of WRITE, we also want to put the GETATTR after
3934 * the operation -- in this case because we want to make sure
140150db 3935 * we get the post-operation mtime and size.
1da177e4
LT		 3936 *
3937 * Both of these changes to the XDR layer would in fact be quite
3938 * minor, but I decided to leave them for a subsequent patch.
3939 */
3940static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3941 unsigned int pgbase, unsigned int pglen)
3942{
3943 struct nfs4_readlink args = {
3944 .fh = NFS_FH(inode),
3945 .pgbase = pgbase,
3946 .pglen = pglen,
3947 .pages = &page,
3948 };
f50c7000 3949 struct nfs4_readlink_res res;
1da177e4
LT		 3950 struct rpc_message msg = {
3951 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3952 .rpc_argp = &args,
f50c7000 3953 .rpc_resp = &res,
1da177e4
LT		 3954 };
3955
7c513058 3956 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3957}
3958
3959static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3960 unsigned int pgbase, unsigned int pglen)
3961{
3962 struct nfs4_exception exception = { };
3963 int err;
3964 do {
c1578b76
TM		 3965 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3966 trace_nfs4_readlink(inode, err);
3967 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3968 &exception);
3969 } while (exception.retry);
3970 return err;
3971}
3972
1da177e4 3973/*
8867fe58 3974 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3975 */
1da177e4
LT		 3976static int
3977nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3978 int flags)
1da177e4 3979{
dff25ddb 3980 struct nfs_server *server = NFS_SERVER(dir);
aa9c2669 3981 struct nfs4_label l, *ilabel = NULL;
8867fe58 3982 struct nfs_open_context *ctx;
1da177e4 3983 struct nfs4_state *state;
1da177e4
LT		 3984 int status = 0;
3985
532d4def 3986 ctx = alloc_nfs_open_context(dentry, FMODE_READ, NULL);
8867fe58
MS		 3987 if (IS_ERR(ctx))
3988 return PTR_ERR(ctx);
3989
aa9c2669
DQ		 3990 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3991
dff25ddb
AG		 3992 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
3993 sattr->ia_mode &= ~current_umask();
c5c3fb5f 3994 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, NULL);
1da177e4
LT		 3995 if (IS_ERR(state)) {
3996 status = PTR_ERR(state);
c0204fd2 3997 goto out;
1da177e4 3998 }
1da177e4 3999out:
aa9c2669 4000 nfs4_label_release_security(ilabel);
8867fe58 4001 put_nfs_open_context(ctx);
1da177e4
LT		 4002 return status;
4003}
4004
beffb8fe 4005static int _nfs4_proc_remove(struct inode *dir, const struct qstr *name)
1da177e4 4006{
16e42959 4007 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 4008 struct nfs_removeargs args = {
1da177e4 4009 .fh = NFS_FH(dir),
26fe5750 4010 .name = *name,
16e42959 4011 };
4fdc17b2 4012 struct nfs_removeres res = {
16e42959 4013 .server = server,
1da177e4 4014 };
1da177e4 4015 struct rpc_message msg = {
4fdc17b2
TM		 4016 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
4017 .rpc_argp = &args,
4018 .rpc_resp = &res,
1da177e4 4019 };
d3129ef6 4020 unsigned long timestamp = jiffies;
778d2817 4021 int status;
1da177e4 4022
7c513058 4023 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 4024 if (status == 0)
d3129ef6 4025 update_changeattr(dir, &res.cinfo, timestamp);
1da177e4
LT		 4026 return status;
4027}
4028
beffb8fe 4029static int nfs4_proc_remove(struct inode *dir, const struct qstr *name)
1da177e4
LT		 4030{
4031 struct nfs4_exception exception = { };
4032 int err;
4033 do {
078ea3df
TM		 4034 err = _nfs4_proc_remove(dir, name);
4035 trace_nfs4_remove(dir, name, err);
4036 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4037 &exception);
4038 } while (exception.retry);
4039 return err;
4040}
4041
e4eff1a6 4042static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 4043{
e4eff1a6
TM		 4044 struct nfs_server *server = NFS_SERVER(dir);
4045 struct nfs_removeargs *args = msg->rpc_argp;
4046 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 4047
e4eff1a6 4048 res->server = server;
1da177e4 4049 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
a9c92d6b 4050 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
aa9c2669
DQ		 4051
4052 nfs_fattr_init(res->dir_attr);
1da177e4
LT		 4053}
4054
34e137cc
BS		 4055static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
4056{
42e1cca7 4057 nfs4_setup_sequence(NFS_SB(data->dentry->d_sb)->nfs_client,
d9afbd1b
TM		 4058 &data->args.seq_args,
4059 &data->res.seq_res,
4060 task);
1da177e4
LT		 4061}
4062
e4eff1a6 4063static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 4064{
078ea3df
TM		 4065 struct nfs_unlinkdata *data = task->tk_calldata;
4066 struct nfs_removeres *res = &data->res;
e4eff1a6 4067
14516c3a
TM		 4068 if (!nfs4_sequence_done(task, &res->seq_res))
4069 return 0;
8478eaa1
N		 4070 if (nfs4_async_handle_error(task, res->server, NULL,
4071 &data->timeout) == -EAGAIN)
e4eff1a6 4072 return 0;
c40d52fe 4073 if (task->tk_status == 0)
d3129ef6 4074 update_changeattr(dir, &res->cinfo, res->dir_attr->time_start);
e4eff1a6 4075 return 1;
1da177e4
LT		 4076}
4077
d3d4152a
JL		 4078static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
4079{
4080 struct nfs_server *server = NFS_SERVER(dir);
4081 struct nfs_renameargs *arg = msg->rpc_argp;
4082 struct nfs_renameres *res = msg->rpc_resp;
4083
4084 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 4085 res->server = server;
a9c92d6b 4086 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 4087}
4088
c6bfa1a1
BS		 4089static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
4090{
42e1cca7 4091 nfs4_setup_sequence(NFS_SERVER(data->old_dir)->nfs_client,
d9afbd1b
TM		 4092 &data->args.seq_args,
4093 &data->res.seq_res,
4094 task);
d3d4152a
JL		 4095}
4096
4097static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
4098 struct inode *new_dir)
4099{
fbc6f7c2
TM		 4100 struct nfs_renamedata *data = task->tk_calldata;
4101 struct nfs_renameres *res = &data->res;
d3d4152a
JL		 4102
4103 if (!nfs4_sequence_done(task, &res->seq_res))
4104 return 0;
8478eaa1 4105 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
d3d4152a
JL		 4106 return 0;
4107
c733c49c 4108 if (task->tk_status == 0) {
d3129ef6 4109 update_changeattr(old_dir, &res->old_cinfo, res->old_fattr->time_start);
c733c49c 4110 if (new_dir != old_dir)
d3129ef6 4111 update_changeattr(new_dir, &res->new_cinfo, res->new_fattr->time_start);
c733c49c 4112 }
d3d4152a
JL		 4113 return 1;
4114}
4115
beffb8fe 4116static int _nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name)
1da177e4 4117{
91ba2eee 4118 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 4119 struct nfs4_link_arg arg = {
4120 .fh = NFS_FH(inode),
4121 .dir_fh = NFS_FH(dir),
4122 .name = name,
91ba2eee
TM		 4123 .bitmask = server->attr_bitmask,
4124 };
91ba2eee
TM		 4125 struct nfs4_link_res res = {
4126 .server = server,
1775fd3e 4127 .label = NULL,
1da177e4 4128 };
1da177e4
LT		 4129 struct rpc_message msg = {
4130 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
4131 .rpc_argp = &arg,
91ba2eee 4132 .rpc_resp = &res,
1da177e4 4133 };
136f2627
TM		 4134 int status = -ENOMEM;
4135
4136 res.fattr = nfs_alloc_fattr();
778d2817 4137 if (res.fattr == NULL)
136f2627 4138 goto out;
1da177e4 4139
14c43f76
DQ		 4140 res.label = nfs4_label_alloc(server, GFP_KERNEL);
4141 if (IS_ERR(res.label)) {
4142 status = PTR_ERR(res.label);
4143 goto out;
4144 }
aa9c2669 4145 arg.bitmask = nfs4_bitmask(server, res.label);
14c43f76 4146
7c513058 4147 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee 4148 if (!status) {
d3129ef6 4149 update_changeattr(dir, &res.cinfo, res.fattr->time_start);
aa9c2669
DQ		 4150 status = nfs_post_op_update_inode(inode, res.fattr);
4151 if (!status)
4152 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 4153 }
14c43f76
DQ		 4154
4155
4156 nfs4_label_free(res.label);
4157
136f2627 4158out:
136f2627 4159 nfs_free_fattr(res.fattr);
1da177e4
LT		 4160 return status;
4161}
4162
beffb8fe 4163static int nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name)
1da177e4
LT		 4164{
4165 struct nfs4_exception exception = { };
4166 int err;
4167 do {
4168 err = nfs4_handle_exception(NFS_SERVER(inode),
4169 _nfs4_proc_link(inode, dir, name),
4170 &exception);
4171 } while (exception.retry);
4172 return err;
4173}
4174
57dc9a57
TM		 4175struct nfs4_createdata {
4176 struct rpc_message msg;
4177 struct nfs4_create_arg arg;
4178 struct nfs4_create_res res;
4179 struct nfs_fh fh;
4180 struct nfs_fattr fattr;
1775fd3e 4181 struct nfs4_label *label;
57dc9a57
TM		 4182};
4183
4184static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
beffb8fe 4185 const struct qstr *name, struct iattr *sattr, u32 ftype)
57dc9a57
TM		 4186{
4187 struct nfs4_createdata *data;
4188
4189 data = kzalloc(sizeof(*data), GFP_KERNEL);
4190 if (data != NULL) {
4191 struct nfs_server *server = NFS_SERVER(dir);
4192
14c43f76
DQ		 4193 data->label = nfs4_label_alloc(server, GFP_KERNEL);
4194 if (IS_ERR(data->label))
4195 goto out_free;
4196
57dc9a57
TM		 4197 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
4198 data->msg.rpc_argp = &data->arg;
4199 data->msg.rpc_resp = &data->res;
4200 data->arg.dir_fh = NFS_FH(dir);
4201 data->arg.server = server;
4202 data->arg.name = name;
4203 data->arg.attrs = sattr;
4204 data->arg.ftype = ftype;
aa9c2669 4205 data->arg.bitmask = nfs4_bitmask(server, data->label);
dff25ddb 4206 data->arg.umask = current_umask();
57dc9a57
TM		 4207 data->res.server = server;
4208 data->res.fh = &data->fh;
4209 data->res.fattr = &data->fattr;
1775fd3e 4210 data->res.label = data->label;
57dc9a57 4211 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 4212 }
4213 return data;
14c43f76
DQ		 4214out_free:
4215 kfree(data);
4216 return NULL;
57dc9a57
TM		 4217}
4218
4219static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
4220{
7c513058 4221 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 4222 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57 4223 if (status == 0) {
d3129ef6
TM		 4224 update_changeattr(dir, &data->res.dir_cinfo,
4225 data->res.fattr->time_start);
1775fd3e 4226 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 4227 }
4228 return status;
4229}
4230
4231static void nfs4_free_createdata(struct nfs4_createdata *data)
4232{
14c43f76 4233 nfs4_label_free(data->label);
57dc9a57
TM		 4234 kfree(data);
4235}
4236
4f390c15 4237static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 4238 struct page *page, unsigned int len, struct iattr *sattr,
4239 struct nfs4_label *label)
1da177e4 4240{
57dc9a57
TM		 4241 struct nfs4_createdata *data;
4242 int status = -ENAMETOOLONG;
1da177e4 4243
94a6d753 4244 if (len > NFS4_MAXPATHLEN)
57dc9a57 4245 goto out;
4f390c15 4246
57dc9a57
TM		 4247 status = -ENOMEM;
4248 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
4249 if (data == NULL)
4250 goto out;
4251
4252 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
4253 data->arg.u.symlink.pages = &page;
4254 data->arg.u.symlink.len = len;
1775fd3e 4255 data->arg.label = label;
1da177e4 4256
57dc9a57
TM		 4257 status = nfs4_do_create(dir, dentry, data);
4258
4259 nfs4_free_createdata(data);
4260out:
1da177e4
LT		 4261 return status;
4262}
4263
4f390c15 4264static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 4265 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 4266{
4267 struct nfs4_exception exception = { };
aa9c2669 4268 struct nfs4_label l, *label = NULL;
1da177e4 4269 int err;
aa9c2669
DQ		 4270
4271 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4272
1da177e4 4273 do {
078ea3df
TM		 4274 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
4275 trace_nfs4_symlink(dir, &dentry->d_name, err);
4276 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4277 &exception);
4278 } while (exception.retry);
aa9c2669
DQ		 4279
4280 nfs4_label_release_security(label);
1da177e4
LT		 4281 return err;
4282}
4283
4284static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 4285 struct iattr *sattr, struct nfs4_label *label)
1da177e4 4286{
57dc9a57
TM		 4287 struct nfs4_createdata *data;
4288 int status = -ENOMEM;
1da177e4 4289
57dc9a57
TM		 4290 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
4291 if (data == NULL)
4292 goto out;
4293
1775fd3e 4294 data->arg.label = label;
57dc9a57
TM		 4295 status = nfs4_do_create(dir, dentry, data);
4296
4297 nfs4_free_createdata(data);
4298out:
1da177e4
LT		 4299 return status;
4300}
4301
4302static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
4303 struct iattr *sattr)
4304{
dff25ddb 4305 struct nfs_server *server = NFS_SERVER(dir);
1da177e4 4306 struct nfs4_exception exception = { };
aa9c2669 4307 struct nfs4_label l, *label = NULL;
1da177e4 4308 int err;
a8a5da99 4309
aa9c2669
DQ		 4310 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4311
dff25ddb
AG		 4312 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
4313 sattr->ia_mode &= ~current_umask();
1da177e4 4314 do {
078ea3df
TM		 4315 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
4316 trace_nfs4_mkdir(dir, &dentry->d_name, err);
4317 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4318 &exception);
4319 } while (exception.retry);
aa9c2669
DQ		 4320 nfs4_label_release_security(label);
4321
1da177e4
LT		 4322 return err;
4323}
4324
4325static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
a7a3b1e9 4326 u64 cookie, struct page **pages, unsigned int count, bool plus)
1da177e4 4327{
2b0143b5 4328 struct inode *dir = d_inode(dentry);
1da177e4
LT		 4329 struct nfs4_readdir_arg args = {
4330 .fh = NFS_FH(dir),
56e4ebf8 4331 .pages = pages,
1da177e4
LT		 4332 .pgbase = 0,
4333 .count = count,
2b0143b5 4334 .bitmask = NFS_SERVER(d_inode(dentry))->attr_bitmask,
82f2e547 4335 .plus = plus,
1da177e4
LT		 4336 };
4337 struct nfs4_readdir_res res;
4338 struct rpc_message msg = {
4339 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
4340 .rpc_argp = &args,
4341 .rpc_resp = &res,
4342 .rpc_cred = cred,
4343 };
4344 int status;
4345
6de1472f
AV		 4346 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
4347 dentry,
eadf4598 4348 (unsigned long long)cookie);
c3f52af3 4349 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 4350 res.pgbase = args.pgbase;
7c513058 4351 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 4352 if (status >= 0) {
c3f52af3 4353 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 4354 status += args.pgbase;
4355 }
c4812998
TM		 4356
4357 nfs_invalidate_atime(dir);
4358
3110ff80 4359 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 4360 return status;
4361}
4362
4363static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
a7a3b1e9 4364 u64 cookie, struct page **pages, unsigned int count, bool plus)
1da177e4
LT		 4365{
4366 struct nfs4_exception exception = { };
4367 int err;
4368 do {
c1578b76
TM		 4369 err = _nfs4_proc_readdir(dentry, cred, cookie,
4370 pages, count, plus);
2b0143b5
DH		 4371 trace_nfs4_readdir(d_inode(dentry), err);
4372 err = nfs4_handle_exception(NFS_SERVER(d_inode(dentry)), err,
1da177e4
LT		 4373 &exception);
4374 } while (exception.retry);
4375 return err;
4376}
4377
4378static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 4379 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 4380{
57dc9a57
TM		 4381 struct nfs4_createdata *data;
4382 int mode = sattr->ia_mode;
4383 int status = -ENOMEM;
1da177e4 4384
57dc9a57
TM		 4385 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
4386 if (data == NULL)
4387 goto out;
4388
1da177e4 4389 if (S_ISFIFO(mode))
57dc9a57 4390 data->arg.ftype = NF4FIFO;
1da177e4 4391 else if (S_ISBLK(mode)) {
57dc9a57
TM		 4392 data->arg.ftype = NF4BLK;
4393 data->arg.u.device.specdata1 = MAJOR(rdev);
4394 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 4395 }
4396 else if (S_ISCHR(mode)) {
57dc9a57
TM		 4397 data->arg.ftype = NF4CHR;
4398 data->arg.u.device.specdata1 = MAJOR(rdev);
4399 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 4400 } else if (!S_ISSOCK(mode)) {
4401 status = -EINVAL;
4402 goto out_free;
1da177e4 4403 }
1775fd3e 4404
aa9c2669 4405 data->arg.label = label;
57dc9a57 4406 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 4407out_free:
57dc9a57
TM		 4408 nfs4_free_createdata(data);
4409out:
1da177e4
LT		 4410 return status;
4411}
4412
4413static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
4414 struct iattr *sattr, dev_t rdev)
4415{
dff25ddb 4416 struct nfs_server *server = NFS_SERVER(dir);
1da177e4 4417 struct nfs4_exception exception = { };
aa9c2669 4418 struct nfs4_label l, *label = NULL;
1da177e4 4419 int err;
a8a5da99 4420
aa9c2669
DQ		 4421 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4422
dff25ddb
AG		 4423 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
4424 sattr->ia_mode &= ~current_umask();
1da177e4 4425 do {
078ea3df
TM		 4426 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
4427 trace_nfs4_mknod(dir, &dentry->d_name, err);
4428 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4429 &exception);
4430 } while (exception.retry);
aa9c2669
DQ		 4431
4432 nfs4_label_release_security(label);
4433
1da177e4
LT		 4434 return err;
4435}
4436
4437static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
4438 struct nfs_fsstat *fsstat)
4439{
4440 struct nfs4_statfs_arg args = {
4441 .fh = fhandle,
4442 .bitmask = server->attr_bitmask,
4443 };
24ad148a
BH		 4444 struct nfs4_statfs_res res = {
4445 .fsstat = fsstat,
4446 };
1da177e4
LT		 4447 struct rpc_message msg = {
4448 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
4449 .rpc_argp = &args,
24ad148a 4450 .rpc_resp = &res,
1da177e4
LT		 4451 };
4452
0e574af1 4453 nfs_fattr_init(fsstat->fattr);
7c513058 4454 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4455}
4456
4457static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
4458{
4459 struct nfs4_exception exception = { };
4460 int err;
4461 do {
4462 err = nfs4_handle_exception(server,
4463 _nfs4_proc_statfs(server, fhandle, fsstat),
4464 &exception);
4465 } while (exception.retry);
4466 return err;
4467}
4468
4469static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
4470 struct nfs_fsinfo *fsinfo)
4471{
4472 struct nfs4_fsinfo_arg args = {
4473 .fh = fhandle,
4474 .bitmask = server->attr_bitmask,
4475 };
3dda5e43
BH		 4476 struct nfs4_fsinfo_res res = {
4477 .fsinfo = fsinfo,
4478 };
1da177e4
LT		 4479 struct rpc_message msg = {
4480 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
4481 .rpc_argp = &args,
3dda5e43 4482 .rpc_resp = &res,
1da177e4
LT		 4483 };
4484
7c513058 4485 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4486}
4487
4488static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4489{
4490 struct nfs4_exception exception = { };
83ca7f5a 4491 unsigned long now = jiffies;
1da177e4
LT		 4492 int err;
4493
4494 do {
83ca7f5a 4495 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
b5f875a9 4496 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
83ca7f5a 4497 if (err == 0) {
fb10fb67
TM		 4498 nfs4_set_lease_period(server->nfs_client,
4499 fsinfo->lease_time * HZ,
4500 now);
83ca7f5a
CL		 4501 break;
4502 }
4503 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 4504 } while (exception.retry);
4505 return err;
4506}
4507
4508static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4509{
e38eb650
BS		 4510 int error;
4511
0e574af1 4512 nfs_fattr_init(fsinfo->fattr);
e38eb650 4513 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 4514 if (error == 0) {
4515 /* block layout checks this! */
4516 server->pnfs_blksize = fsinfo->blksize;
ca440c38 4517 set_pnfs_layoutdriver(server, fhandle, fsinfo);
dc182549 4518 }
e38eb650
BS		 4519
4520 return error;
1da177e4
LT		 4521}
4522
4523static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4524 struct nfs_pathconf *pathconf)
4525{
4526 struct nfs4_pathconf_arg args = {
4527 .fh = fhandle,
4528 .bitmask = server->attr_bitmask,
4529 };
d45b2989
BH		 4530 struct nfs4_pathconf_res res = {
4531 .pathconf = pathconf,
4532 };
1da177e4
LT		 4533 struct rpc_message msg = {
4534 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
4535 .rpc_argp = &args,
d45b2989 4536 .rpc_resp = &res,
1da177e4
LT		 4537 };
4538
4539 /* None of the pathconf attributes are mandatory to implement */
4540 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
4541 memset(pathconf, 0, sizeof(*pathconf));
4542 return 0;
4543 }
4544
0e574af1 4545 nfs_fattr_init(pathconf->fattr);
7c513058 4546 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4547}
4548
4549static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4550 struct nfs_pathconf *pathconf)
4551{
4552 struct nfs4_exception exception = { };
4553 int err;
4554
4555 do {
4556 err = nfs4_handle_exception(server,
4557 _nfs4_proc_pathconf(server, fhandle, pathconf),
4558 &exception);
4559 } while (exception.retry);
4560 return err;
4561}
4562
5521abfd 4563int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 4564 const struct nfs_open_context *ctx,
4565 const struct nfs_lock_context *l_ctx,
4566 fmode_t fmode)
4567{
17393475 4568 return nfs4_select_rw_stateid(ctx->state, fmode, l_ctx, stateid, NULL);
9b206149
TM		 4569}
4570EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4571
5521abfd
TM		 4572static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4573 const struct nfs_open_context *ctx,
4574 const struct nfs_lock_context *l_ctx,
4575 fmode_t fmode)
4576{
4577 nfs4_stateid current_stateid;
4578
e1253be0
TM		 4579 /* If the current stateid represents a lost lock, then exit */
4580 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode) == -EIO)
4581 return true;
5521abfd
TM		 4582 return nfs4_stateid_match(stateid, &current_stateid);
4583}
4584
4585static bool nfs4_error_stateid_expired(int err)
4586{
4587 switch (err) {
4588 case -NFS4ERR_DELEG_REVOKED:
4589 case -NFS4ERR_ADMIN_REVOKED:
4590 case -NFS4ERR_BAD_STATEID:
4591 case -NFS4ERR_STALE_STATEID:
4592 case -NFS4ERR_OLD_STATEID:
4593 case -NFS4ERR_OPENMODE:
4594 case -NFS4ERR_EXPIRED:
4595 return true;
4596 }
4597 return false;
4598}
4599
d45f60c6 4600static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
1da177e4 4601{
d45f60c6 4602 struct nfs_server *server = NFS_SERVER(hdr->inode);
1da177e4 4603
d45f60c6 4604 trace_nfs4_read(hdr, task->tk_status);
9c27869d
TM		 4605 if (task->tk_status < 0) {
4606 struct nfs4_exception exception = {
4607 .inode = hdr->inode,
4608 .state = hdr->args.context->state,
4609 .stateid = &hdr->args.stateid,
4610 };
4611 task->tk_status = nfs4_async_handle_exception(task,
4612 server, task->tk_status, &exception);
4613 if (exception.retry) {
4614 rpc_restart_call_prepare(task);
4615 return -EAGAIN;
4616 }
1da177e4 4617 }
8850df99 4618
1da177e4 4619 if (task->tk_status > 0)
d45f60c6 4620 renew_lease(server, hdr->timestamp);
ec06c096 4621 return 0;
1da177e4
LT		 4622}
4623
5521abfd 4624static bool nfs4_read_stateid_changed(struct rpc_task *task,
3c6b899c 4625 struct nfs_pgio_args *args)
5521abfd
TM		 4626{
4627
4628 if (!nfs4_error_stateid_expired(task->tk_status) ||
4629 nfs4_stateid_is_current(&args->stateid,
4630 args->context,
4631 args->lock_context,
4632 FMODE_READ))
4633 return false;
4634 rpc_restart_call_prepare(task);
4635 return true;
4636}
4637
d45f60c6 4638static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
cbdabc7f
AA		 4639{
4640
4641 dprintk("--> %s\n", __func__);
4642
d45f60c6 4643 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
cbdabc7f 4644 return -EAGAIN;
d45f60c6 4645 if (nfs4_read_stateid_changed(task, &hdr->args))
5521abfd 4646 return -EAGAIN;
bfc505de
TM		 4647 if (task->tk_status > 0)
4648 nfs_invalidate_atime(hdr->inode);
d45f60c6
WAA		 4649 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4650 nfs4_read_done_cb(task, hdr);
cbdabc7f
AA		 4651}
4652
d45f60c6
WAA		 4653static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
4654 struct rpc_message *msg)
1da177e4 4655{
d45f60c6 4656 hdr->timestamp = jiffies;
ca857cc1
TM		 4657 if (!hdr->pgio_done_cb)
4658 hdr->pgio_done_cb = nfs4_read_done_cb;
bdc7f021 4659 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
d45f60c6 4660 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
1da177e4
LT		 4661}
4662
d45f60c6
WAA		 4663static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
4664 struct nfs_pgio_header *hdr)
ea7c3303 4665{
42e1cca7 4666 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode)->nfs_client,
d45f60c6
WAA		 4667 &hdr->args.seq_args,
4668 &hdr->res.seq_res,
9b206149 4669 task))
ef1820f9 4670 return 0;
d45f60c6
WAA		 4671 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
4672 hdr->args.lock_context,
fbe77c30 4673 hdr->rw_mode) == -EIO)
ef1820f9 4674 return -EIO;
d45f60c6 4675 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
ef1820f9
N		 4676 return -EIO;
4677 return 0;
1da177e4
LT		 4678}
4679
d45f60c6
WAA		 4680static int nfs4_write_done_cb(struct rpc_task *task,
4681 struct nfs_pgio_header *hdr)
1da177e4 4682{
d45f60c6 4683 struct inode *inode = hdr->inode;
8478eaa1 4684
d45f60c6 4685 trace_nfs4_write(hdr, task->tk_status);
9c27869d
TM		 4686 if (task->tk_status < 0) {
4687 struct nfs4_exception exception = {
4688 .inode = hdr->inode,
4689 .state = hdr->args.context->state,
4690 .stateid = &hdr->args.stateid,
4691 };
4692 task->tk_status = nfs4_async_handle_exception(task,
4693 NFS_SERVER(inode), task->tk_status,
4694 &exception);
4695 if (exception.retry) {
4696 rpc_restart_call_prepare(task);
4697 return -EAGAIN;
4698 }
1da177e4 4699 }
4f9838c7 4700 if (task->tk_status >= 0) {
d45f60c6 4701 renew_lease(NFS_SERVER(inode), hdr->timestamp);
a08a8cd3 4702 nfs_writeback_update_inode(hdr);
4f9838c7 4703 }
788e7a89 4704 return 0;
1da177e4
LT		 4705}
4706
5521abfd 4707static bool nfs4_write_stateid_changed(struct rpc_task *task,
3c6b899c 4708 struct nfs_pgio_args *args)
5521abfd
TM		 4709{
4710
4711 if (!nfs4_error_stateid_expired(task->tk_status) ||
4712 nfs4_stateid_is_current(&args->stateid,
4713 args->context,
4714 args->lock_context,
4715 FMODE_WRITE))
4716 return false;
4717 rpc_restart_call_prepare(task);
4718 return true;
4719}
4720
d45f60c6 4721static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
b029bc9b 4722{
d45f60c6 4723 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
b029bc9b 4724 return -EAGAIN;
d45f60c6 4725 if (nfs4_write_stateid_changed(task, &hdr->args))
5521abfd 4726 return -EAGAIN;
d45f60c6
WAA		 4727 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4728 nfs4_write_done_cb(task, hdr);
b029bc9b
FI		 4729}
4730
5a37f851 4731static
d45f60c6 4732bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
a69aef14 4733{
5a37f851 4734 /* Don't request attributes for pNFS or O_DIRECT writes */
d45f60c6 4735 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
5a37f851
TM		 4736 return false;
4737 /* Otherwise, request attributes if and only if we don't hold
4738 * a delegation
4739 */
011e2a7f 4740 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 4741}
a69aef14 4742
d45f60c6
WAA		 4743static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
4744 struct rpc_message *msg)
1da177e4 4745{
d45f60c6 4746 struct nfs_server *server = NFS_SERVER(hdr->inode);
bdc7f021 4747
d45f60c6
WAA		 4748 if (!nfs4_write_need_cache_consistency_data(hdr)) {
4749 hdr->args.bitmask = NULL;
4750 hdr->res.fattr = NULL;
7ffd1064 4751 } else
d45f60c6 4752 hdr->args.bitmask = server->cache_consistency_bitmask;
5a37f851 4753
d45f60c6
WAA		 4754 if (!hdr->pgio_done_cb)
4755 hdr->pgio_done_cb = nfs4_write_done_cb;
4756 hdr->res.server = server;
4757 hdr->timestamp = jiffies;
1da177e4 4758
bdc7f021 4759 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
d45f60c6 4760 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
1da177e4
LT		 4761}
4762
0b7c0153 4763static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 4764{
42e1cca7 4765 nfs4_setup_sequence(NFS_SERVER(data->inode)->nfs_client,
d9afbd1b
TM		 4766 &data->args.seq_args,
4767 &data->res.seq_res,
4768 task);
1da177e4
LT		 4769}
4770
0b7c0153 4771static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 4772{
1da177e4 4773 struct inode *inode = data->inode;
14516c3a 4774
cc668ab3 4775 trace_nfs4_commit(data, task->tk_status);
8478eaa1
N		 4776 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4777 NULL, NULL) == -EAGAIN) {
d00c5d43 4778 rpc_restart_call_prepare(task);
788e7a89 4779 return -EAGAIN;
1da177e4 4780 }
788e7a89 4781 return 0;
1da177e4
LT		 4782}
4783
0b7c0153 4784static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 4785{
4786 if (!nfs4_sequence_done(task, &data->res.seq_res))
4787 return -EAGAIN;
0b7c0153 4788 return data->commit_done_cb(task, data);
5f452431
FI		 4789}
4790
0b7c0153 4791static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 4792{
788e7a89 4793 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 4794
0b7c0153
FI		 4795 if (data->commit_done_cb == NULL)
4796 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 4797 data->res.server = server;
bdc7f021 4798 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
a9c92d6b 4799 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4800}
4801
9bc4e3ca
CL		 4802struct nfs4_renewdata {
4803 struct nfs_client *client;
4804 unsigned long timestamp;
4805};
4806
1da177e4
LT		 4807/*
4808 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4809 * standalone procedure for queueing an asynchronous RENEW.
4810 */
9bc4e3ca 4811static void nfs4_renew_release(void *calldata)
dc96aef9 4812{
9bc4e3ca
CL		 4813 struct nfs4_renewdata *data = calldata;
4814 struct nfs_client *clp = data->client;
dc96aef9 4815
0851de06
AB		 4816 if (atomic_read(&clp->cl_count) > 1)
4817 nfs4_schedule_state_renewal(clp);
4818 nfs_put_client(clp);
9bc4e3ca 4819 kfree(data);
dc96aef9
AB		 4820}
4821
9bc4e3ca 4822static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 4823{
9bc4e3ca
CL		 4824 struct nfs4_renewdata *data = calldata;
4825 struct nfs_client *clp = data->client;
4826 unsigned long timestamp = data->timestamp;
1da177e4 4827
c6d01c6f 4828 trace_nfs4_renew_async(clp, task->tk_status);
f8aba1e8
CL		 4829 switch (task->tk_status) {
4830 case 0:
4831 break;
4832 case -NFS4ERR_LEASE_MOVED:
4833 nfs4_schedule_lease_moved_recovery(clp);
4834 break;
4835 default:
95baa25c 4836 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 4837 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4838 return;
4839 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 4840 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 4841 return;
4842 }
4843 nfs4_schedule_path_down_recovery(clp);
1da177e4 4844 }
452e9352 4845 do_renew_lease(clp, timestamp);
1da177e4
LT		 4846}
4847
963d8fe5
TM		 4848static const struct rpc_call_ops nfs4_renew_ops = {
4849 .rpc_call_done = nfs4_renew_done,
dc96aef9 4850 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 4851};
4852
2f60ea6b 4853static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 4854{
4855 struct rpc_message msg = {
4856 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4857 .rpc_argp = clp,
b4454fe1 4858 .rpc_cred = cred,
1da177e4 4859 };
9bc4e3ca 4860 struct nfs4_renewdata *data;
1da177e4 4861
2f60ea6b
TM		 4862 if (renew_flags == 0)
4863 return 0;
0851de06
AB		 4864 if (!atomic_inc_not_zero(&clp->cl_count))
4865 return -EIO;
b569ad34 4866 data = kmalloc(sizeof(*data), GFP_NOFS);
5c737cb2
DW		 4867 if (data == NULL) {
4868 nfs_put_client(clp);
9bc4e3ca 4869 return -ENOMEM;
5c737cb2 4870 }
9bc4e3ca
CL		 4871 data->client = clp;
4872 data->timestamp = jiffies;
bc7a05ca 4873 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 4874 &nfs4_renew_ops, data);
1da177e4
LT		 4875}
4876
8534d4ec 4877static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 4878{
4879 struct rpc_message msg = {
4880 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4881 .rpc_argp = clp,
b4454fe1 4882 .rpc_cred = cred,
1da177e4
LT		 4883 };
4884 unsigned long now = jiffies;
4885 int status;
4886
bc7a05ca 4887 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4888 if (status < 0)
4889 return status;
452e9352 4890 do_renew_lease(clp, now);
1da177e4
LT		 4891 return 0;
4892}
4893
aa1870af
BF		 4894static inline int nfs4_server_supports_acls(struct nfs_server *server)
4895{
7dd7d959 4896 return server->caps & NFS_CAP_ACLS;
aa1870af
BF		 4897}
4898
21f498c2
TM		 4899/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4900 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 4901 * the stack.
4902 */
21f498c2 4903#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 4904
e9e3d724 4905static int buf_to_pages_noslab(const void *buf, size_t buflen,
8fbcf237 4906 struct page **pages)
e9e3d724
NH		 4907{
4908 struct page *newpage, **spages;
4909 int rc = 0;
4910 size_t len;
4911 spages = pages;
4912
4913 do {
21f498c2 4914 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 4915 newpage = alloc_page(GFP_KERNEL);
4916
4917 if (newpage == NULL)
4918 goto unwind;
4919 memcpy(page_address(newpage), buf, len);
d9b67e1e
AS		 4920 buf += len;
4921 buflen -= len;
e9e3d724
NH		 4922 *pages++ = newpage;
4923 rc++;
4924 } while (buflen != 0);
4925
4926 return rc;
4927
4928unwind:
4929 for(; rc > 0; rc--)
4930 __free_page(spages[rc-1]);
4931 return -ENOMEM;
4932}
4933
e50a1c2e
BF		 4934struct nfs4_cached_acl {
4935 int cached;
4936 size_t len;
3e9d4154 4937 char data[0];
e50a1c2e
BF		 4938};
4939
4940static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4941{
4942 struct nfs_inode *nfsi = NFS_I(inode);
4943
4944 spin_lock(&inode->i_lock);
4945 kfree(nfsi->nfs4_acl);
4946 nfsi->nfs4_acl = acl;
4947 spin_unlock(&inode->i_lock);
4948}
4949
4950static void nfs4_zap_acl_attr(struct inode *inode)
4951{
4952 nfs4_set_cached_acl(inode, NULL);
4953}
4954
4955static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4956{
4957 struct nfs_inode *nfsi = NFS_I(inode);
4958 struct nfs4_cached_acl *acl;
4959 int ret = -ENOENT;
4960
4961 spin_lock(&inode->i_lock);
4962 acl = nfsi->nfs4_acl;
4963 if (acl == NULL)
4964 goto out;
4965 if (buf == NULL) /* user is just asking for length */
4966 goto out_len;
4967 if (acl->cached == 0)
4968 goto out;
4969 ret = -ERANGE; /* see getxattr(2) man page */
4970 if (acl->len > buflen)
4971 goto out;
4972 memcpy(buf, acl->data, acl->len);
4973out_len:
4974 ret = acl->len;
4975out:
4976 spin_unlock(&inode->i_lock);
4977 return ret;
4978}
4979
5794d21e 4980static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 4981{
4982 struct nfs4_cached_acl *acl;
b291f1b1 4983 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 4984
1f1ea6c2 4985 if (buflen <= PAGE_SIZE) {
b291f1b1 4986 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 4987 if (acl == NULL)
4988 goto out;
4989 acl->cached = 1;
5794d21e 4990 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 4991 } else {
4992 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4993 if (acl == NULL)
4994 goto out;
4995 acl->cached = 0;
4996 }
4997 acl->len = acl_len;
4998out:
4999 nfs4_set_cached_acl(inode, acl);
5000}
5001
bf118a34
AA		 5002/*
5003 * The getxattr API returns the required buffer length when called with a
5004 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
5005 * the required buf. On a NULL buf, we send a page of data to the server
5006 * guessing that the ACL request can be serviced by a page. If so, we cache
5007 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
5008 * the cache. If not so, we throw away the page, and cache the required
5009 * length. The next getxattr call will then produce another round trip to
5010 * the server, this time with the input buf of the required size.
5011 */
16b4289c 5012static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 5013{
ed92d8c1 5014 struct page *pages[NFS4ACL_MAXPAGES + 1] = {NULL, };
aa1870af
BF		 5015 struct nfs_getaclargs args = {
5016 .fh = NFS_FH(inode),
5017 .acl_pages = pages,
5018 .acl_len = buflen,
5019 };
663c79b3
BH		 5020 struct nfs_getaclres res = {
5021 .acl_len = buflen,
5022 };
aa1870af
BF		 5023 struct rpc_message msg = {
5024 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
5025 .rpc_argp = &args,
663c79b3 5026 .rpc_resp = &res,
aa1870af 5027 };
ed92d8c1 5028 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE) + 1;
21f498c2 5029 int ret = -ENOMEM, i;
aa1870af 5030
21f498c2
TM		 5031 if (npages > ARRAY_SIZE(pages))
5032 return -ERANGE;
5a006899 5033
bf118a34
AA		 5034 for (i = 0; i < npages; i++) {
5035 pages[i] = alloc_page(GFP_KERNEL);
5036 if (!pages[i])
5037 goto out_free;
e50a1c2e 5038 }
5a006899
SP		 5039
5040 /* for decoding across pages */
5041 res.acl_scratch = alloc_page(GFP_KERNEL);
5042 if (!res.acl_scratch)
5043 goto out_free;
5044
bf118a34 5045 args.acl_len = npages * PAGE_SIZE;
5a006899 5046
de040bec 5047 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 5048 __func__, buf, buflen, npages, args.acl_len);
5049 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
5050 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 5051 if (ret)
5052 goto out_free;
bf118a34 5053
1f1ea6c2
TM		 5054 /* Handle the case where the passed-in buffer is too short */
5055 if (res.acl_flags & NFS4_ACL_TRUNC) {
5056 /* Did the user only issue a request for the acl length? */
5057 if (buf == NULL)
5058 goto out_ok;
e50a1c2e 5059 ret = -ERANGE;
1f1ea6c2 5060 goto out_free;
e50a1c2e 5061 }
1f1ea6c2 5062 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 5063 if (buf) {
5064 if (res.acl_len > buflen) {
5065 ret = -ERANGE;
5066 goto out_free;
5067 }
1f1ea6c2 5068 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 5069 }
1f1ea6c2
TM		 5070out_ok:
5071 ret = res.acl_len;
e50a1c2e 5072out_free:
bf118a34
AA		 5073 for (i = 0; i < npages; i++)
5074 if (pages[i])
5075 __free_page(pages[i]);
331818f1
TM		 5076 if (res.acl_scratch)
5077 __free_page(res.acl_scratch);
aa1870af
BF		 5078 return ret;
5079}
5080
16b4289c
TM		 5081static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
5082{
5083 struct nfs4_exception exception = { };
5084 ssize_t ret;
5085 do {
5086 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
c1578b76 5087 trace_nfs4_get_acl(inode, ret);
16b4289c
TM		 5088 if (ret >= 0)
5089 break;
5090 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
5091 } while (exception.retry);
5092 return ret;
5093}
5094
e50a1c2e
BF		 5095static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
5096{
5097 struct nfs_server *server = NFS_SERVER(inode);
5098 int ret;
5099
5100 if (!nfs4_server_supports_acls(server))
5101 return -EOPNOTSUPP;
5102 ret = nfs_revalidate_inode(server, inode);
5103 if (ret < 0)
5104 return ret;
08a22b39
AK		 5105 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
5106 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 5107 ret = nfs4_read_cached_acl(inode, buf, buflen);
5108 if (ret != -ENOENT)
bf118a34
AA		 5109 /* -ENOENT is returned if there is no ACL or if there is an ACL
5110 * but no cached acl data, just the acl length */
e50a1c2e
BF		 5111 return ret;
5112 return nfs4_get_acl_uncached(inode, buf, buflen);
5113}
5114
16b4289c 5115static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 5116{
5117 struct nfs_server *server = NFS_SERVER(inode);
5118 struct page *pages[NFS4ACL_MAXPAGES];
5119 struct nfs_setaclargs arg = {
5120 .fh = NFS_FH(inode),
5121 .acl_pages = pages,
5122 .acl_len = buflen,
5123 };
73c403a9 5124 struct nfs_setaclres res;
4b580ee3
BF		 5125 struct rpc_message msg = {
5126 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
5127 .rpc_argp = &arg,
73c403a9 5128 .rpc_resp = &res,
4b580ee3 5129 };
21f498c2 5130 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 5131 int ret, i;
4b580ee3
BF		 5132
5133 if (!nfs4_server_supports_acls(server))
5134 return -EOPNOTSUPP;
21f498c2
TM		 5135 if (npages > ARRAY_SIZE(pages))
5136 return -ERANGE;
8fbcf237 5137 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages);
e9e3d724
NH		 5138 if (i < 0)
5139 return i;
57ec14c5 5140 nfs4_inode_return_delegation(inode);
7c513058 5141 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 5142
5143 /*
5144 * Free each page after tx, so the only ref left is
5145 * held by the network stack
5146 */
5147 for (; i > 0; i--)
5148 put_page(pages[i-1]);
5149
08a22b39
AK		 5150 /*
5151 * Acl update can result in inode attribute update.
5152 * so mark the attribute cache invalid.
5153 */
5154 spin_lock(&inode->i_lock);
5155 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
5156 spin_unlock(&inode->i_lock);
f41f7418
TM		 5157 nfs_access_zap_cache(inode);
5158 nfs_zap_acl_cache(inode);
4b580ee3
BF		 5159 return ret;
5160}
5161
16b4289c
TM		 5162static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
5163{
5164 struct nfs4_exception exception = { };
5165 int err;
5166 do {
c1578b76
TM		 5167 err = __nfs4_proc_set_acl(inode, buf, buflen);
5168 trace_nfs4_set_acl(inode, err);
5169 err = nfs4_handle_exception(NFS_SERVER(inode), err,
16b4289c
TM		 5170 &exception);
5171 } while (exception.retry);
5172 return err;
5173}
5174
aa9c2669
DQ		 5175#ifdef CONFIG_NFS_V4_SECURITY_LABEL
5176static int _nfs4_get_security_label(struct inode *inode, void *buf,
5177 size_t buflen)
5178{
5179 struct nfs_server *server = NFS_SERVER(inode);
5180 struct nfs_fattr fattr;
5181 struct nfs4_label label = {0, 0, buflen, buf};
5182
5183 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
fcb63a9b 5184 struct nfs4_getattr_arg arg = {
aa9c2669
DQ		 5185 .fh = NFS_FH(inode),
5186 .bitmask = bitmask,
5187 };
5188 struct nfs4_getattr_res res = {
5189 .fattr = &fattr,
5190 .label = &label,
5191 .server = server,
5192 };
5193 struct rpc_message msg = {
5194 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
fcb63a9b 5195 .rpc_argp = &arg,
aa9c2669
DQ		 5196 .rpc_resp = &res,
5197 };
5198 int ret;
5199
5200 nfs_fattr_init(&fattr);
5201
fcb63a9b 5202 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
aa9c2669
DQ		 5203 if (ret)
5204 return ret;
5205 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
5206 return -ENOENT;
5207 if (buflen < label.len)
5208 return -ERANGE;
5209 return 0;
5210}
5211
5212static int nfs4_get_security_label(struct inode *inode, void *buf,
5213 size_t buflen)
5214{
5215 struct nfs4_exception exception = { };
5216 int err;
5217
5218 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
5219 return -EOPNOTSUPP;
5220
5221 do {
c1578b76
TM		 5222 err = _nfs4_get_security_label(inode, buf, buflen);
5223 trace_nfs4_get_security_label(inode, err);
5224 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 5225 &exception);
5226 } while (exception.retry);
5227 return err;
5228}
5229
5230static int _nfs4_do_set_security_label(struct inode *inode,
5231 struct nfs4_label *ilabel,
5232 struct nfs_fattr *fattr,
5233 struct nfs4_label *olabel)
5234{
5235
5236 struct iattr sattr = {0};
5237 struct nfs_server *server = NFS_SERVER(inode);
5238 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
12207f69 5239 struct nfs_setattrargs arg = {
d9b67e1e
AS		 5240 .fh = NFS_FH(inode),
5241 .iap = &sattr,
aa9c2669
DQ		 5242 .server = server,
5243 .bitmask = bitmask,
5244 .label = ilabel,
5245 };
5246 struct nfs_setattrres res = {
5247 .fattr = fattr,
5248 .label = olabel,
5249 .server = server,
5250 };
5251 struct rpc_message msg = {
d9b67e1e
AS		 5252 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
5253 .rpc_argp = &arg,
5254 .rpc_resp = &res,
aa9c2669
DQ		 5255 };
5256 int status;
5257
12207f69 5258 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
aa9c2669 5259
12207f69 5260 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
aa9c2669
DQ		 5261 if (status)
5262 dprintk("%s failed: %d\n", __func__, status);
5263
5264 return status;
5265}
5266
5267static int nfs4_do_set_security_label(struct inode *inode,
5268 struct nfs4_label *ilabel,
5269 struct nfs_fattr *fattr,
5270 struct nfs4_label *olabel)
5271{
5272 struct nfs4_exception exception = { };
5273 int err;
5274
5275 do {
c1578b76
TM		 5276 err = _nfs4_do_set_security_label(inode, ilabel,
5277 fattr, olabel);
5278 trace_nfs4_set_security_label(inode, err);
5279 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 5280 &exception);
5281 } while (exception.retry);
5282 return err;
5283}
5284
5285static int
59301226 5286nfs4_set_security_label(struct inode *inode, const void *buf, size_t buflen)
aa9c2669
DQ		 5287{
5288 struct nfs4_label ilabel, *olabel = NULL;
5289 struct nfs_fattr fattr;
5290 struct rpc_cred *cred;
aa9c2669
DQ		 5291 int status;
5292
5293 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
5294 return -EOPNOTSUPP;
5295
5296 nfs_fattr_init(&fattr);
5297
5298 ilabel.pi = 0;
5299 ilabel.lfs = 0;
5300 ilabel.label = (char *)buf;
5301 ilabel.len = buflen;
5302
5303 cred = rpc_lookup_cred();
5304 if (IS_ERR(cred))
5305 return PTR_ERR(cred);
5306
5307 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
5308 if (IS_ERR(olabel)) {
5309 status = -PTR_ERR(olabel);
5310 goto out;
5311 }
5312
5313 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
5314 if (status == 0)
5315 nfs_setsecurity(inode, &fattr, olabel);
5316
5317 nfs4_label_free(olabel);
5318out:
5319 put_rpccred(cred);
5320 return status;
5321}
5322#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
5323
5324
f092075d
CL		 5325static void nfs4_init_boot_verifier(const struct nfs_client *clp,
5326 nfs4_verifier *bootverf)
cd93710e
CL		 5327{
5328 __be32 verf[2];
5329
2c820d9a
CL		 5330 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
5331 /* An impossible timestamp guarantees this value
5332 * will never match a generated boot time. */
2f86e091
DD		 5333 verf[0] = cpu_to_be32(U32_MAX);
5334 verf[1] = cpu_to_be32(U32_MAX);
2c820d9a 5335 } else {
f092075d 5336 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
2f86e091
DD		 5337 u64 ns = ktime_to_ns(nn->boot_time);
5338
5339 verf[0] = cpu_to_be32(ns >> 32);
5340 verf[1] = cpu_to_be32(ns);
2c820d9a 5341 }
cd93710e
CL		 5342 memcpy(bootverf->data, verf, sizeof(bootverf->data));
5343}
5344
a3192688
JL		 5345static int
5346nfs4_init_nonuniform_client_string(struct nfs_client *clp)
e984a55a 5347{
a3192688
JL		 5348 size_t len;
5349 char *str;
e984a55a 5350
ceb3a16c 5351 if (clp->cl_owner_id != NULL)
a3192688 5352 return 0;
4a3e5779 5353
a3192688 5354 rcu_read_lock();
4a70316c 5355 len = 14 + strlen(clp->cl_ipaddr) + 1 +
a3192688
JL		 5356 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) +
5357 1 +
5358 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO)) +
5359 1;
5360 rcu_read_unlock();
5361
5362 if (len > NFS4_OPAQUE_LIMIT + 1)
5363 return -EINVAL;
5364
5365 /*
5366 * Since this string is allocated at mount time, and held until the
5367 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5368 * about a memory-reclaim deadlock.
5369 */
5370 str = kmalloc(len, GFP_KERNEL);
5371 if (!str)
5372 return -ENOMEM;
ceb3a16c 5373
e984a55a 5374 rcu_read_lock();
f2dd436e 5375 scnprintf(str, len, "Linux NFSv4.0 %s/%s %s",
a3192688
JL		 5376 clp->cl_ipaddr,
5377 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR),
5378 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO));
e984a55a 5379 rcu_read_unlock();
a3192688 5380
a3192688
JL		 5381 clp->cl_owner_id = str;
5382 return 0;
e984a55a
CL		 5383}
5384
873e3851
JL		 5385static int
5386nfs4_init_uniquifier_client_string(struct nfs_client *clp)
5387{
873e3851
JL		 5388 size_t len;
5389 char *str;
5390
5391 len = 10 + 10 + 1 + 10 + 1 +
5392 strlen(nfs4_client_id_uniquifier) + 1 +
5393 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5394
5395 if (len > NFS4_OPAQUE_LIMIT + 1)
5396 return -EINVAL;
5397
5398 /*
5399 * Since this string is allocated at mount time, and held until the
5400 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5401 * about a memory-reclaim deadlock.
5402 */
5403 str = kmalloc(len, GFP_KERNEL);
5404 if (!str)
5405 return -ENOMEM;
5406
f2dd436e 5407 scnprintf(str, len, "Linux NFSv%u.%u %s/%s",
873e3851
JL		 5408 clp->rpc_ops->version, clp->cl_minorversion,
5409 nfs4_client_id_uniquifier,
5410 clp->cl_rpcclient->cl_nodename);
873e3851
JL		 5411 clp->cl_owner_id = str;
5412 return 0;
5413}
5414
5415static int
5416nfs4_init_uniform_client_string(struct nfs_client *clp)
e984a55a 5417{
873e3851
JL		 5418 size_t len;
5419 char *str;
ceb3a16c
TM		 5420
5421 if (clp->cl_owner_id != NULL)
873e3851 5422 return 0;
6f2ea7f2
CL		 5423
5424 if (nfs4_client_id_uniquifier[0] != '\0')
873e3851
JL		 5425 return nfs4_init_uniquifier_client_string(clp);
5426
5427 len = 10 + 10 + 1 + 10 + 1 +
5428 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5429
5430 if (len > NFS4_OPAQUE_LIMIT + 1)
5431 return -EINVAL;
5432
5433 /*
5434 * Since this string is allocated at mount time, and held until the
5435 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5436 * about a memory-reclaim deadlock.
5437 */
5438 str = kmalloc(len, GFP_KERNEL);
5439 if (!str)
5440 return -ENOMEM;
5441
f2dd436e 5442 scnprintf(str, len, "Linux NFSv%u.%u %s",
873e3851
JL		 5443 clp->rpc_ops->version, clp->cl_minorversion,
5444 clp->cl_rpcclient->cl_nodename);
873e3851
JL		 5445 clp->cl_owner_id = str;
5446 return 0;
e984a55a
CL		 5447}
5448
706cb8db
CL		 5449/*
5450 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
5451 * services. Advertise one based on the address family of the
5452 * clientaddr.
5453 */
5454static unsigned int
5455nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
5456{
5457 if (strchr(clp->cl_ipaddr, ':') != NULL)
5458 return scnprintf(buf, len, "tcp6");
5459 else
5460 return scnprintf(buf, len, "tcp");
5461}
5462
f11b2a1c
JL		 5463static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
5464{
5465 struct nfs4_setclientid *sc = calldata;
5466
5467 if (task->tk_status == 0)
5468 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
5469}
5470
5471static const struct rpc_call_ops nfs4_setclientid_ops = {
5472 .rpc_call_done = nfs4_setclientid_done,
5473};
5474
6bbb4ae8
CL		 5475/**
5476 * nfs4_proc_setclientid - Negotiate client ID
5477 * @clp: state data structure
5478 * @program: RPC program for NFSv4 callback service
5479 * @port: IP port number for NFS4 callback service
5480 * @cred: RPC credential to use for this call
5481 * @res: where to place the result
5482 *
5483 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5484 */
bb8b27e5
TM		 5485int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
5486 unsigned short port, struct rpc_cred *cred,
5487 struct nfs4_setclientid_res *res)
1da177e4
LT		 5488{
5489 nfs4_verifier sc_verifier;
5490 struct nfs4_setclientid setclientid = {
5491 .sc_verifier = &sc_verifier,
5492 .sc_prog = program,
3a6bb738 5493 .sc_clnt = clp,
1da177e4
LT		 5494 };
5495 struct rpc_message msg = {
5496 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
5497 .rpc_argp = &setclientid,
bb8b27e5 5498 .rpc_resp = res,
286d7d6a 5499 .rpc_cred = cred,
1da177e4 5500 };
f11b2a1c
JL		 5501 struct rpc_task *task;
5502 struct rpc_task_setup task_setup_data = {
5503 .rpc_client = clp->cl_rpcclient,
5504 .rpc_message = &msg,
5505 .callback_ops = &nfs4_setclientid_ops,
5506 .callback_data = &setclientid,
5507 .flags = RPC_TASK_TIMEOUT,
5508 };
6bbb4ae8 5509 int status;
1da177e4 5510
de734831 5511 /* nfs_client_id4 */
f092075d 5512 nfs4_init_boot_verifier(clp, &sc_verifier);
873e3851
JL		 5513
5514 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
5515 status = nfs4_init_uniform_client_string(clp);
5516 else
a3192688 5517 status = nfs4_init_nonuniform_client_string(clp);
873e3851
JL		 5518
5519 if (status)
5520 goto out;
3a6bb738 5521
de734831 5522 /* cb_client4 */
706cb8db
CL		 5523 setclientid.sc_netid_len =
5524 nfs4_init_callback_netid(clp,
5525 setclientid.sc_netid,
5526 sizeof(setclientid.sc_netid));
de734831 5527 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 5528 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 5529 clp->cl_ipaddr, port >> 8, port & 255);
5530
3a6bb738 5531 dprintk("NFS call setclientid auth=%s, '%s'\n",
6bbb4ae8 5532 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3a6bb738 5533 clp->cl_owner_id);
f11b2a1c
JL		 5534 task = rpc_run_task(&task_setup_data);
5535 if (IS_ERR(task)) {
5536 status = PTR_ERR(task);
5537 goto out;
5538 }
5539 status = task->tk_status;
5540 if (setclientid.sc_cred) {
5541 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
5542 put_rpccred(setclientid.sc_cred);
5543 }
5544 rpc_put_task(task);
5545out:
c6d01c6f 5546 trace_nfs4_setclientid(clp, status);
6bbb4ae8
CL		 5547 dprintk("NFS reply setclientid: %d\n", status);
5548 return status;
1da177e4
LT		 5549}
5550
6bbb4ae8
CL		 5551/**
5552 * nfs4_proc_setclientid_confirm - Confirm client ID
5553 * @clp: state data structure
5554 * @res: result of a previous SETCLIENTID
5555 * @cred: RPC credential to use for this call
5556 *
5557 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5558 */
fd954ae1 5559int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 5560 struct nfs4_setclientid_res *arg,
5561 struct rpc_cred *cred)
1da177e4 5562{
1da177e4
LT		 5563 struct rpc_message msg = {
5564 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 5565 .rpc_argp = arg,
286d7d6a 5566 .rpc_cred = cred,
1da177e4 5567 };
1da177e4
LT		 5568 int status;
5569
6bbb4ae8
CL		 5570 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
5571 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5572 clp->cl_clientid);
1bd714f2 5573 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 5574 trace_nfs4_setclientid_confirm(clp, status);
6bbb4ae8 5575 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 5576 return status;
5577}
5578
fe650407
TM		 5579struct nfs4_delegreturndata {
5580 struct nfs4_delegreturnargs args;
fa178f29 5581 struct nfs4_delegreturnres res;
fe650407
TM		 5582 struct nfs_fh fh;
5583 nfs4_stateid stateid;
26e976a8 5584 unsigned long timestamp;
586f1c39
TM		 5585 struct {
5586 struct nfs4_layoutreturn_args arg;
5587 struct nfs4_layoutreturn_res res;
4d796d75 5588 struct nfs4_xdr_opaque_data ld_private;
586f1c39
TM		 5589 u32 roc_barrier;
5590 bool roc;
5591 } lr;
fa178f29 5592 struct nfs_fattr fattr;
fe650407 5593 int rpc_status;
039b756a 5594 struct inode *inode;
fe650407
TM		 5595};
5596
fe650407
TM		 5597static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
5598{
5599 struct nfs4_delegreturndata *data = calldata;
938e1010 5600
14516c3a
TM		 5601 if (!nfs4_sequence_done(task, &data->res.seq_res))
5602 return;
938e1010 5603
ca8acf8d 5604 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
586f1c39
TM		 5605
5606 /* Handle Layoutreturn errors */
5607 if (data->args.lr_args && task->tk_status != 0) {
5608 switch(data->res.lr_ret) {
5609 default:
5610 data->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
5611 break;
5612 case 0:
5613 data->args.lr_args = NULL;
5614 data->res.lr_res = NULL;
5615 break;
5616 case -NFS4ERR_ADMIN_REVOKED:
5617 case -NFS4ERR_DELEG_REVOKED:
5618 case -NFS4ERR_EXPIRED:
5619 case -NFS4ERR_BAD_STATEID:
5620 case -NFS4ERR_OLD_STATEID:
5621 case -NFS4ERR_UNKNOWN_LAYOUTTYPE:
5622 case -NFS4ERR_WRONG_CRED:
5623 data->args.lr_args = NULL;
5624 data->res.lr_res = NULL;
5625 data->res.lr_ret = 0;
5626 rpc_restart_call_prepare(task);
5627 return;
5628 }
5629 }
5630
79708861 5631 switch (task->tk_status) {
79708861 5632 case 0:
fa178f29 5633 renew_lease(data->res.server, data->timestamp);
23ea44c2 5634 break;
c97cf606
TM		 5635 case -NFS4ERR_ADMIN_REVOKED:
5636 case -NFS4ERR_DELEG_REVOKED:
26d36301
TM		 5637 case -NFS4ERR_EXPIRED:
5638 nfs4_free_revoked_stateid(data->res.server,
5639 data->args.stateid,
5640 task->tk_msg.rpc_cred);
c97cf606
TM		 5641 case -NFS4ERR_BAD_STATEID:
5642 case -NFS4ERR_OLD_STATEID:
5643 case -NFS4ERR_STALE_STATEID:
c97cf606
TM		 5644 task->tk_status = 0;
5645 break;
8ac2b422
TM		 5646 case -NFS4ERR_ACCESS:
5647 if (data->args.bitmask) {
5648 data->args.bitmask = NULL;
5649 data->res.fattr = NULL;
5650 task->tk_status = 0;
5651 rpc_restart_call_prepare(task);
5652 return;
5653 }
79708861 5654 default:
8478eaa1
N		 5655 if (nfs4_async_handle_error(task, data->res.server,
5656 NULL, NULL) == -EAGAIN) {
d00c5d43 5657 rpc_restart_call_prepare(task);
79708861
RL		 5658 return;
5659 }
5660 }
5661 data->rpc_status = task->tk_status;
fe650407
TM		 5662}
5663
5664static void nfs4_delegreturn_release(void *calldata)
5665{
039b756a 5666 struct nfs4_delegreturndata *data = calldata;
ea7c38fe 5667 struct inode *inode = data->inode;
039b756a 5668
ea7c38fe 5669 if (inode) {
586f1c39 5670 if (data->lr.roc)
1c5bd76d
TM		 5671 pnfs_roc_release(&data->lr.arg, &data->lr.res,
5672 data->res.lr_ret);
0bc2c9b4 5673 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
ea7c38fe
TM		 5674 nfs_iput_and_deactive(inode);
5675 }
fe650407
TM		 5676 kfree(calldata);
5677}
5678
938e1010
AA		 5679static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5680{
5681 struct nfs4_delegreturndata *d_data;
5682
5683 d_data = (struct nfs4_delegreturndata *)data;
5684
1c5bd76d 5685 if (!d_data->lr.roc && nfs4_wait_on_layoutreturn(d_data->inode, task))
500d701f
PT		 5686 return;
5687
42e1cca7 5688 nfs4_setup_sequence(d_data->res.server->nfs_client,
d9afbd1b
TM		 5689 &d_data->args.seq_args,
5690 &d_data->res.seq_res,
5691 task);
938e1010 5692}
938e1010 5693
c8d149f3 5694static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010 5695 .rpc_call_prepare = nfs4_delegreturn_prepare,
fe650407
TM		 5696 .rpc_call_done = nfs4_delegreturn_done,
5697 .rpc_release = nfs4_delegreturn_release,
5698};
5699
e6f81075 5700static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 5701{
5702 struct nfs4_delegreturndata *data;
fa178f29 5703 struct nfs_server *server = NFS_SERVER(inode);
fe650407 5704 struct rpc_task *task;
5138fde0
TM		 5705 struct rpc_message msg = {
5706 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5707 .rpc_cred = cred,
5708 };
c970aa85
TM		 5709 struct rpc_task_setup task_setup_data = {
5710 .rpc_client = server->client,
5138fde0 5711 .rpc_message = &msg,
c970aa85
TM		 5712 .callback_ops = &nfs4_delegreturn_ops,
5713 .flags = RPC_TASK_ASYNC,
5714 };
e6f81075 5715 int status = 0;
fe650407 5716
8535b2be 5717 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 5718 if (data == NULL)
5719 return -ENOMEM;
a9c92d6b 5720 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
99ade3c7
AE		 5721
5722 nfs4_state_protect(server->nfs_client,
5723 NFS_SP4_MACH_CRED_CLEANUP,
5724 &task_setup_data.rpc_client, &msg);
5725
fe650407
TM		 5726 data->args.fhandle = &data->fh;
5727 data->args.stateid = &data->stateid;
9e907fec 5728 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 5729 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 5730 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 5731 data->res.fattr = &data->fattr;
5732 data->res.server = server;
586f1c39 5733 data->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
4d796d75 5734 data->lr.arg.ld_private = &data->lr.ld_private;
5138fde0 5735 nfs_fattr_init(data->res.fattr);
26e976a8 5736 data->timestamp = jiffies;
fe650407 5737 data->rpc_status = 0;
53e6fc86 5738 data->lr.roc = pnfs_roc(inode, &data->lr.arg, &data->lr.res, cred);
ea7c38fe 5739 data->inode = nfs_igrab_and_active(inode);
1c5bd76d 5740 if (data->inode) {
1c5bd76d
TM		 5741 if (data->lr.roc) {
5742 data->args.lr_args = &data->lr.arg;
5743 data->res.lr_res = &data->lr.res;
5744 }
53e6fc86
TM		 5745 } else if (data->lr.roc) {
5746 pnfs_roc_release(&data->lr.arg, &data->lr.res, 0);
5747 data->lr.roc = false;
1c5bd76d 5748 }
fe650407 5749
c970aa85 5750 task_setup_data.callback_data = data;
1174dd1f
TM		 5751 msg.rpc_argp = &data->args;
5752 msg.rpc_resp = &data->res;
c970aa85 5753 task = rpc_run_task(&task_setup_data);
7a1218a2 5754 if (IS_ERR(task))
fe650407 5755 return PTR_ERR(task);
e6f81075
TM		 5756 if (!issync)
5757 goto out;
820bf85c 5758 status = rpc_wait_for_completion_task(task);
e6f81075
TM		 5759 if (status != 0)
5760 goto out;
5761 status = data->rpc_status;
e6f81075 5762out:
e6b3c4db 5763 rpc_put_task(task);
fe650407 5764 return status;
1da177e4
LT		 5765}
5766
e6f81075 5767int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 5768{
5769 struct nfs_server *server = NFS_SERVER(inode);
5770 struct nfs4_exception exception = { };
5771 int err;
5772 do {
e6f81075 5773 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
48c9579a 5774 trace_nfs4_delegreturn(inode, stateid, err);
1da177e4
LT		 5775 switch (err) {
5776 case -NFS4ERR_STALE_STATEID:
5777 case -NFS4ERR_EXPIRED:
1da177e4
LT		 5778 case 0:
5779 return 0;
5780 }
5781 err = nfs4_handle_exception(server, err, &exception);
5782 } while (exception.retry);
5783 return err;
5784}
5785
1da177e4
LT		 5786static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5787{
5788 struct inode *inode = state->inode;
5789 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 5790 struct nfs_client *clp = server->nfs_client;
911d1aaf 5791 struct nfs_lockt_args arg = {
1da177e4 5792 .fh = NFS_FH(inode),
911d1aaf 5793 .fl = request,
1da177e4 5794 };
911d1aaf
TM		 5795 struct nfs_lockt_res res = {
5796 .denied = request,
1da177e4
LT		 5797 };
5798 struct rpc_message msg = {
5799 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
d9b67e1e
AS		 5800 .rpc_argp = &arg,
5801 .rpc_resp = &res,
1da177e4
LT		 5802 .rpc_cred = state->owner->so_cred,
5803 };
1da177e4
LT		 5804 struct nfs4_lock_state *lsp;
5805 int status;
5806
911d1aaf 5807 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 5808 status = nfs4_set_lock_state(state, request);
5809 if (status != 0)
5810 goto out;
5811 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 5812 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5813 arg.lock_owner.s_dev = server->s_dev;
7c513058 5814 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 5815 switch (status) {
5816 case 0:
5817 request->fl_type = F_UNLCK;
5818 break;
5819 case -NFS4ERR_DENIED:
5820 status = 0;
1da177e4 5821 }
70cc6487 5822 request->fl_ops->fl_release_private(request);
a6f951dd 5823 request->fl_ops = NULL;
8d0a8a9d 5824out:
1da177e4
LT		 5825 return status;
5826}
5827
5828static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5829{
5830 struct nfs4_exception exception = { };
5831 int err;
5832
5833 do {
d1b748a5
TM		 5834 err = _nfs4_proc_getlk(state, cmd, request);
5835 trace_nfs4_get_lock(request, state, cmd, err);
5836 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
1da177e4
LT		 5837 &exception);
5838 } while (exception.retry);
5839 return err;
5840}
5841
faf5f49c 5842struct nfs4_unlockdata {
911d1aaf
TM		 5843 struct nfs_locku_args arg;
5844 struct nfs_locku_res res;
faf5f49c
TM		 5845 struct nfs4_lock_state *lsp;
5846 struct nfs_open_context *ctx;
f30cb757 5847 struct nfs_lock_context *l_ctx;
911d1aaf 5848 struct file_lock fl;
516285eb 5849 struct nfs_server *server;
26e976a8 5850 unsigned long timestamp;
faf5f49c
TM		 5851};
5852
911d1aaf
TM		 5853static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5854 struct nfs_open_context *ctx,
5855 struct nfs4_lock_state *lsp,
5856 struct nfs_seqid *seqid)
5857{
5858 struct nfs4_unlockdata *p;
5859 struct inode *inode = lsp->ls_state->inode;
5860
8535b2be 5861 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 5862 if (p == NULL)
5863 return NULL;
5864 p->arg.fh = NFS_FH(inode);
5865 p->arg.fl = &p->fl;
5866 p->arg.seqid = seqid;
c1d51931 5867 p->res.seqid = seqid;
911d1aaf
TM		 5868 p->lsp = lsp;
5869 atomic_inc(&lsp->ls_count);
5870 /* Ensure we don't close file until we're done freeing locks! */
5871 p->ctx = get_nfs_open_context(ctx);
f30cb757 5872 p->l_ctx = nfs_get_lock_context(ctx);
911d1aaf
TM		 5873 memcpy(&p->fl, fl, sizeof(p->fl));
5874 p->server = NFS_SERVER(inode);
5875 return p;
5876}
5877
06f814a3 5878static void nfs4_locku_release_calldata(void *data)
faf5f49c 5879{
963d8fe5 5880 struct nfs4_unlockdata *calldata = data;
911d1aaf 5881 nfs_free_seqid(calldata->arg.seqid);
06f814a3 5882 nfs4_put_lock_state(calldata->lsp);
f30cb757 5883 nfs_put_lock_context(calldata->l_ctx);
06f814a3
TM		 5884 put_nfs_open_context(calldata->ctx);
5885 kfree(calldata);
faf5f49c
TM		 5886}
5887
963d8fe5 5888static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 5889{
963d8fe5 5890 struct nfs4_unlockdata *calldata = data;
faf5f49c 5891
14516c3a
TM		 5892 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5893 return;
faf5f49c
TM		 5894 switch (task->tk_status) {
5895 case 0:
26e976a8 5896 renew_lease(calldata->server, calldata->timestamp);
75575ddf 5897 locks_lock_inode_wait(calldata->lsp->ls_state->inode, &calldata->fl);
c69899a1
TM		 5898 if (nfs4_update_lock_stateid(calldata->lsp,
5899 &calldata->res.stateid))
5900 break;
26d36301
TM		 5901 case -NFS4ERR_ADMIN_REVOKED:
5902 case -NFS4ERR_EXPIRED:
5903 nfs4_free_revoked_stateid(calldata->server,
5904 &calldata->arg.stateid,
5905 task->tk_msg.rpc_cred);
9e33bed5
TM		 5906 case -NFS4ERR_BAD_STATEID:
5907 case -NFS4ERR_OLD_STATEID:
faf5f49c 5908 case -NFS4ERR_STALE_STATEID:
425c1d4e
TM		 5909 if (!nfs4_stateid_match(&calldata->arg.stateid,
5910 &calldata->lsp->ls_stateid))
5911 rpc_restart_call_prepare(task);
faf5f49c
TM		 5912 break;
5913 default:
8478eaa1
N		 5914 if (nfs4_async_handle_error(task, calldata->server,
5915 NULL, NULL) == -EAGAIN)
d00c5d43 5916 rpc_restart_call_prepare(task);
faf5f49c 5917 }
2b1bc308 5918 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 5919}
5920
4ce70ada 5921static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 5922{
4ce70ada 5923 struct nfs4_unlockdata *calldata = data;
faf5f49c 5924
f30cb757
BC		 5925 if (test_bit(NFS_CONTEXT_UNLOCK, &calldata->l_ctx->open_context->flags) &&
5926 nfs_async_iocounter_wait(task, calldata->l_ctx))
5927 return;
5928
911d1aaf 5929 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 5930 goto out_wait;
425c1d4e 5931 nfs4_stateid_copy(&calldata->arg.stateid, &calldata->lsp->ls_stateid);
795a88c9 5932 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 5933 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 5934 goto out_no_action;
faf5f49c 5935 }
26e976a8 5936 calldata->timestamp = jiffies;
42e1cca7 5937 if (nfs4_setup_sequence(calldata->server->nfs_client,
a893693c 5938 &calldata->arg.seq_args,
2240a9e2
TM		 5939 &calldata->res.seq_res,
5940 task) != 0)
5941 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 5942 return;
5943out_no_action:
5944 task->tk_action = NULL;
5945out_wait:
5946 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 5947}
5948
963d8fe5 5949static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 5950 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 5951 .rpc_call_done = nfs4_locku_done,
06f814a3 5952 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 5953};
5954
a5d16a4d
TM		 5955static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5956 struct nfs_open_context *ctx,
5957 struct nfs4_lock_state *lsp,
5958 struct nfs_seqid *seqid)
5959{
5960 struct nfs4_unlockdata *data;
5138fde0
TM		 5961 struct rpc_message msg = {
5962 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5963 .rpc_cred = ctx->cred,
5964 };
c970aa85
TM		 5965 struct rpc_task_setup task_setup_data = {
5966 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 5967 .rpc_message = &msg,
c970aa85 5968 .callback_ops = &nfs4_locku_ops,
101070ca 5969 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5970 .flags = RPC_TASK_ASYNC,
5971 };
a5d16a4d 5972
fa940720
WAA		 5973 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5974 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5975
137d6aca
FF		 5976 /* Ensure this is an unlock - when canceling a lock, the
5977 * canceled lock is passed in, and it won't be an unlock.
5978 */
5979 fl->fl_type = F_UNLCK;
f30cb757
BC		 5980 if (fl->fl_flags & FL_CLOSE)
5981 set_bit(NFS_CONTEXT_UNLOCK, &ctx->flags);
137d6aca 5982
a5d16a4d
TM		 5983 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5984 if (data == NULL) {
5985 nfs_free_seqid(seqid);
5986 return ERR_PTR(-ENOMEM);
5987 }
5988
a9c92d6b 5989 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5990 msg.rpc_argp = &data->arg;
5991 msg.rpc_resp = &data->res;
c970aa85
TM		 5992 task_setup_data.callback_data = data;
5993 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 5994}
5995
faf5f49c
TM		 5996static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5997{
65b62a29
TM		 5998 struct inode *inode = state->inode;
5999 struct nfs4_state_owner *sp = state->owner;
6000 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 6001 struct nfs_seqid *seqid;
1da177e4 6002 struct nfs4_lock_state *lsp;
06f814a3 6003 struct rpc_task *task;
b4019c0e 6004 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
06f814a3 6005 int status = 0;
536ff0f8 6006 unsigned char fl_flags = request->fl_flags;
faf5f49c 6007
8d0a8a9d 6008 status = nfs4_set_lock_state(state, request);
9b073574
TM		 6009 /* Unlock _before_ we do the RPC call */
6010 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 6011 /* Exclude nfs_delegation_claim_locks() */
6012 mutex_lock(&sp->so_delegreturn_mutex);
6013 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57 6014 down_read(&nfsi->rwsem);
75575ddf 6015 if (locks_lock_inode_wait(inode, request) == -ENOENT) {
19e03c57 6016 up_read(&nfsi->rwsem);
65b62a29 6017 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 6018 goto out;
19e03c57
TM		 6019 }
6020 up_read(&nfsi->rwsem);
65b62a29 6021 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 6022 if (status != 0)
9b073574
TM		 6023 goto out;
6024 /* Is this a delegated lock? */
8d0a8a9d 6025 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 6026 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
6027 goto out;
b4019c0e
TM		 6028 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid;
6029 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 6030 status = -ENOMEM;
badc76dd 6031 if (IS_ERR(seqid))
9b073574 6032 goto out;
cd3758e3 6033 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 6034 status = PTR_ERR(task);
6035 if (IS_ERR(task))
9b073574 6036 goto out;
820bf85c 6037 status = rpc_wait_for_completion_task(task);
e6b3c4db 6038 rpc_put_task(task);
9b073574 6039out:
536ff0f8 6040 request->fl_flags = fl_flags;
d1b748a5 6041 trace_nfs4_unlock(request, state, F_SETLK, status);
1da177e4
LT		 6042 return status;
6043}
6044
a5d16a4d
TM		 6045struct nfs4_lockdata {
6046 struct nfs_lock_args arg;
6047 struct nfs_lock_res res;
6048 struct nfs4_lock_state *lsp;
6049 struct nfs_open_context *ctx;
6050 struct file_lock fl;
26e976a8 6051 unsigned long timestamp;
a5d16a4d
TM		 6052 int rpc_status;
6053 int cancelled;
66179efe 6054 struct nfs_server *server;
a5d16a4d
TM		 6055};
6056
6057static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 6058 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
6059 gfp_t gfp_mask)
1da177e4 6060{
a5d16a4d
TM		 6061 struct nfs4_lockdata *p;
6062 struct inode *inode = lsp->ls_state->inode;
1da177e4 6063 struct nfs_server *server = NFS_SERVER(inode);
b4019c0e 6064 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
a5d16a4d 6065
8535b2be 6066 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 6067 if (p == NULL)
6068 return NULL;
6069
6070 p->arg.fh = NFS_FH(inode);
6071 p->arg.fl = &p->fl;
8535b2be 6072 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
badc76dd 6073 if (IS_ERR(p->arg.open_seqid))
2f74c0a0 6074 goto out_free;
b4019c0e
TM		 6075 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
6076 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask);
badc76dd 6077 if (IS_ERR(p->arg.lock_seqid))
2f74c0a0 6078 goto out_free_seqid;
7539bbab 6079 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 6080 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 6081 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 6082 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 6083 p->lsp = lsp;
66179efe 6084 p->server = server;
a5d16a4d
TM		 6085 atomic_inc(&lsp->ls_count);
6086 p->ctx = get_nfs_open_context(ctx);
6087 memcpy(&p->fl, fl, sizeof(p->fl));
6088 return p;
2f74c0a0
TM		 6089out_free_seqid:
6090 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 6091out_free:
6092 kfree(p);
6093 return NULL;
6094}
6095
6096static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
6097{
6098 struct nfs4_lockdata *data = calldata;
6099 struct nfs4_state *state = data->lsp->ls_state;
06735b34 6100
3110ff80 6101 dprintk("%s: begin!\n", __func__);
2f74c0a0 6102 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 6103 goto out_wait;
a5d16a4d 6104 /* Do we need to do an open_to_lock_owner? */
6b447539 6105 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) {
8fe72bac 6106 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 6107 goto out_release_lock_seqid;
8fe72bac 6108 }
425c1d4e
TM		 6109 nfs4_stateid_copy(&data->arg.open_stateid,
6110 &state->open_stateid);
a5d16a4d 6111 data->arg.new_lock_owner = 1;
c1d51931 6112 data->res.open_seqid = data->arg.open_seqid;
425c1d4e 6113 } else {
2f74c0a0 6114 data->arg.new_lock_owner = 0;
425c1d4e
TM		 6115 nfs4_stateid_copy(&data->arg.lock_stateid,
6116 &data->lsp->ls_stateid);
6117 }
5d422301
TM		 6118 if (!nfs4_valid_open_stateid(state)) {
6119 data->rpc_status = -EBADF;
6120 task->tk_action = NULL;
6121 goto out_release_open_seqid;
6122 }
26e976a8 6123 data->timestamp = jiffies;
42e1cca7 6124 if (nfs4_setup_sequence(data->server->nfs_client,
035168ab 6125 &data->arg.seq_args,
2240a9e2 6126 &data->res.seq_res,
d9afbd1b 6127 task) == 0)
66179efe 6128 return;
5d422301 6129out_release_open_seqid:
2240a9e2
TM		 6130 nfs_release_seqid(data->arg.open_seqid);
6131out_release_lock_seqid:
6132 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 6133out_wait:
6134 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 6135 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 6136}
6137
a5d16a4d
TM		 6138static void nfs4_lock_done(struct rpc_task *task, void *calldata)
6139{
6140 struct nfs4_lockdata *data = calldata;
39071e6f 6141 struct nfs4_lock_state *lsp = data->lsp;
a5d16a4d 6142
3110ff80 6143 dprintk("%s: begin!\n", __func__);
a5d16a4d 6144
14516c3a
TM		 6145 if (!nfs4_sequence_done(task, &data->res.seq_res))
6146 return;
66179efe 6147
a5d16a4d 6148 data->rpc_status = task->tk_status;
425c1d4e
TM		 6149 switch (task->tk_status) {
6150 case 0:
2b0143b5 6151 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)),
39071e6f 6152 data->timestamp);
c69899a1
TM		 6153 if (data->arg.new_lock) {
6154 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS);
75575ddf 6155 if (locks_lock_inode_wait(lsp->ls_state->inode, &data->fl) < 0) {
c69899a1
TM		 6156 rpc_restart_call_prepare(task);
6157 break;
6158 }
6159 }
39071e6f
TM		 6160 if (data->arg.new_lock_owner != 0) {
6161 nfs_confirm_seqid(&lsp->ls_seqid, 0);
6162 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid);
6163 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
6164 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid))
6165 rpc_restart_call_prepare(task);
425c1d4e
TM		 6166 break;
6167 case -NFS4ERR_BAD_STATEID:
6168 case -NFS4ERR_OLD_STATEID:
6169 case -NFS4ERR_STALE_STATEID:
6170 case -NFS4ERR_EXPIRED:
6171 if (data->arg.new_lock_owner != 0) {
6172 if (!nfs4_stateid_match(&data->arg.open_stateid,
6173 &lsp->ls_state->open_stateid))
6174 rpc_restart_call_prepare(task);
6175 } else if (!nfs4_stateid_match(&data->arg.lock_stateid,
6176 &lsp->ls_stateid))
6177 rpc_restart_call_prepare(task);
a5d16a4d 6178 }
3110ff80 6179 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 6180}
6181
6182static void nfs4_lock_release(void *calldata)
6183{
6184 struct nfs4_lockdata *data = calldata;
6185
3110ff80 6186 dprintk("%s: begin!\n", __func__);
2f74c0a0 6187 nfs_free_seqid(data->arg.open_seqid);
a7a3b1e9 6188 if (data->cancelled) {
a5d16a4d
TM		 6189 struct rpc_task *task;
6190 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
6191 data->arg.lock_seqid);
6192 if (!IS_ERR(task))
bf294b41 6193 rpc_put_task_async(task);
3110ff80 6194 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 6195 } else
6196 nfs_free_seqid(data->arg.lock_seqid);
6197 nfs4_put_lock_state(data->lsp);
6198 put_nfs_open_context(data->ctx);
6199 kfree(data);
3110ff80 6200 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 6201}
6202
6203static const struct rpc_call_ops nfs4_lock_ops = {
6204 .rpc_call_prepare = nfs4_lock_prepare,
6205 .rpc_call_done = nfs4_lock_done,
6206 .rpc_release = nfs4_lock_release,
6207};
6208
2bee72a6
TM		 6209static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
6210{
2bee72a6
TM		 6211 switch (error) {
6212 case -NFS4ERR_ADMIN_REVOKED:
d7f3e4bf 6213 case -NFS4ERR_EXPIRED:
2bee72a6 6214 case -NFS4ERR_BAD_STATEID:
ecac799a 6215 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 6216 if (new_lock_owner != 0 ||
795a88c9 6217 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 6218 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 6219 break;
6220 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 6221 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a 6222 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 6223 };
6224}
6225
afe6c27c 6226static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 6227{
6228 struct nfs4_lockdata *data;
6229 struct rpc_task *task;
5138fde0
TM		 6230 struct rpc_message msg = {
6231 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
6232 .rpc_cred = state->owner->so_cred,
6233 };
c970aa85
TM		 6234 struct rpc_task_setup task_setup_data = {
6235 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 6236 .rpc_message = &msg,
c970aa85 6237 .callback_ops = &nfs4_lock_ops,
101070ca 6238 .workqueue = nfsiod_workqueue,
c970aa85
TM		 6239 .flags = RPC_TASK_ASYNC,
6240 };
a5d16a4d
TM		 6241 int ret;
6242
3110ff80 6243 dprintk("%s: begin!\n", __func__);
cd3758e3 6244 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 6245 fl->fl_u.nfs4_fl.owner,
6246 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 6247 if (data == NULL)
6248 return -ENOMEM;
6249 if (IS_SETLKW(cmd))
6250 data->arg.block = 1;
a9c92d6b 6251 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 6252 msg.rpc_argp = &data->arg;
6253 msg.rpc_resp = &data->res;
c970aa85 6254 task_setup_data.callback_data = data;
8fe72bac
TM		 6255 if (recovery_type > NFS_LOCK_NEW) {
6256 if (recovery_type == NFS_LOCK_RECLAIM)
6257 data->arg.reclaim = NFS_LOCK_RECLAIM;
6258 nfs4_set_sequence_privileged(&data->arg.seq_args);
c69899a1
TM		 6259 } else
6260 data->arg.new_lock = 1;
c970aa85 6261 task = rpc_run_task(&task_setup_data);
7a1218a2 6262 if (IS_ERR(task))
a5d16a4d 6263 return PTR_ERR(task);
820bf85c 6264 ret = rpc_wait_for_completion_task(task);
a5d16a4d
TM		 6265 if (ret == 0) {
6266 ret = data->rpc_status;
2bee72a6
TM		 6267 if (ret)
6268 nfs4_handle_setlk_error(data->server, data->lsp,
6269 data->arg.new_lock_owner, ret);
a5d16a4d 6270 } else
a7a3b1e9 6271 data->cancelled = true;
e6b3c4db 6272 rpc_put_task(task);
3110ff80 6273 dprintk("%s: done, ret = %d!\n", __func__, ret);
48c9579a 6274 trace_nfs4_set_lock(fl, state, &data->res.stateid, cmd, ret);
a5d16a4d 6275 return ret;
1da177e4
LT		 6276}
6277
6278static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
6279{
202b50dc 6280 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 6281 struct nfs4_exception exception = {
6282 .inode = state->inode,
6283 };
202b50dc
TM		 6284 int err;
6285
6286 do {
42a2d13e
TM		 6287 /* Cache the lock if possible... */
6288 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
6289 return 0;
afe6c27c 6290 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 6291 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 6292 break;
6293 nfs4_handle_exception(server, err, &exception);
6294 } while (exception.retry);
6295 return err;
1da177e4
LT		 6296}
6297
6298static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
6299{
202b50dc 6300 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 6301 struct nfs4_exception exception = {
6302 .inode = state->inode,
6303 };
202b50dc
TM		 6304 int err;
6305
6bfc93ef
TM		 6306 err = nfs4_set_lock_state(state, request);
6307 if (err != 0)
6308 return err;
f6de7a39 6309 if (!recover_lost_locks) {
ef1820f9
N		 6310 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
6311 return 0;
6312 }
202b50dc 6313 do {
42a2d13e
TM		 6314 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
6315 return 0;
afe6c27c 6316 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 6317 switch (err) {
6318 default:
6319 goto out;
6320 case -NFS4ERR_GRACE:
6321 case -NFS4ERR_DELAY:
6322 nfs4_handle_exception(server, err, &exception);
6323 err = 0;
6324 }
202b50dc 6325 } while (exception.retry);
a9ed2e25 6326out:
202b50dc 6327 return err;
1da177e4
LT		 6328}
6329
f062eb6c 6330#if defined(CONFIG_NFS_V4_1)
b01dd1d8
BS		 6331static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
6332{
c5896fc8
TM		 6333 struct nfs4_lock_state *lsp;
6334 int status;
b01dd1d8 6335
c5896fc8
TM		 6336 status = nfs4_set_lock_state(state, request);
6337 if (status != 0)
6338 return status;
6339 lsp = request->fl_u.nfs4_fl.owner;
6340 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) ||
6341 test_bit(NFS_LOCK_LOST, &lsp->ls_flags))
6342 return 0;
81b68de4 6343 return nfs4_lock_expired(state, request);
f062eb6c
BS		 6344}
6345#endif
6346
1da177e4
LT		 6347static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6348{
19e03c57 6349 struct nfs_inode *nfsi = NFS_I(state->inode);
11476e9d 6350 struct nfs4_state_owner *sp = state->owner;
01c3b861 6351 unsigned char fl_flags = request->fl_flags;
1ea67dbd 6352 int status;
1da177e4 6353
01c3b861 6354 request->fl_flags |= FL_ACCESS;
75575ddf 6355 status = locks_lock_inode_wait(state->inode, request);
01c3b861
TM		 6356 if (status < 0)
6357 goto out;
11476e9d 6358 mutex_lock(&sp->so_delegreturn_mutex);
19e03c57 6359 down_read(&nfsi->rwsem);
01c3b861 6360 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 6361 /* Yes: cache locks! */
01c3b861 6362 /* ...but avoid races with delegation recall... */
19e03c57 6363 request->fl_flags = fl_flags & ~FL_SLEEP;
75575ddf 6364 status = locks_lock_inode_wait(state->inode, request);
c69899a1 6365 up_read(&nfsi->rwsem);
11476e9d 6366 mutex_unlock(&sp->so_delegreturn_mutex);
9a99af49 6367 goto out;
9a99af49 6368 }
19e03c57 6369 up_read(&nfsi->rwsem);
11476e9d 6370 mutex_unlock(&sp->so_delegreturn_mutex);
c69899a1 6371 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
01c3b861
TM		 6372out:
6373 request->fl_flags = fl_flags;
1da177e4
LT		 6374 return status;
6375}
6376
6377static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6378{
a1d0b5ee
TM		 6379 struct nfs4_exception exception = {
6380 .state = state,
05ffe24f 6381 .inode = state->inode,
a1d0b5ee 6382 };
1da177e4
LT		 6383 int err;
6384
6385 do {
965b5d67
TM		 6386 err = _nfs4_proc_setlk(state, cmd, request);
6387 if (err == -NFS4ERR_DENIED)
6388 err = -EAGAIN;
1da177e4 6389 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 6390 err, &exception);
1da177e4
LT		 6391 } while (exception.retry);
6392 return err;
6393}
6394
d2f3a7f9
JL		 6395#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
6396#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
6397
6398static int
a1d617d8
JL		 6399nfs4_retry_setlk_simple(struct nfs4_state *state, int cmd,
6400 struct file_lock *request)
d2f3a7f9
JL		 6401{
6402 int status = -ERESTARTSYS;
6403 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
6404
6405 while(!signalled()) {
6406 status = nfs4_proc_setlk(state, cmd, request);
6407 if ((status != -EAGAIN) || IS_SETLK(cmd))
6408 break;
6409 freezable_schedule_timeout_interruptible(timeout);
6410 timeout *= 2;
6411 timeout = min_t(unsigned long, NFS4_LOCK_MAXTIMEOUT, timeout);
6412 status = -ERESTARTSYS;
6413 }
6414 return status;
6415}
6416
a1d617d8
JL		 6417#ifdef CONFIG_NFS_V4_1
6418struct nfs4_lock_waiter {
6419 struct task_struct *task;
6420 struct inode *inode;
6421 struct nfs_lowner *owner;
6422 bool notified;
6423};
6424
6425static int
6426nfs4_wake_lock_waiter(wait_queue_t *wait, unsigned int mode, int flags, void *key)
6427{
6428 int ret;
6429 struct cb_notify_lock_args *cbnl = key;
6430 struct nfs4_lock_waiter *waiter = wait->private;
6431 struct nfs_lowner *lowner = &cbnl->cbnl_owner,
6432 *wowner = waiter->owner;
6433
6434 /* Only wake if the callback was for the same owner */
6435 if (lowner->clientid != wowner->clientid ||
6436 lowner->id != wowner->id ||
6437 lowner->s_dev != wowner->s_dev)
6438 return 0;
6439
6440 /* Make sure it's for the right inode */
6441 if (nfs_compare_fh(NFS_FH(waiter->inode), &cbnl->cbnl_fh))
6442 return 0;
6443
6444 waiter->notified = true;
6445
6446 /* override "private" so we can use default_wake_function */
6447 wait->private = waiter->task;
6448 ret = autoremove_wake_function(wait, mode, flags, key);
6449 wait->private = waiter;
6450 return ret;
6451}
6452
6453static int
6454nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6455{
6456 int status = -ERESTARTSYS;
6457 unsigned long flags;
6458 struct nfs4_lock_state *lsp = request->fl_u.nfs4_fl.owner;
6459 struct nfs_server *server = NFS_SERVER(state->inode);
6460 struct nfs_client *clp = server->nfs_client;
6461 wait_queue_head_t *q = &clp->cl_lock_waitq;
6462 struct nfs_lowner owner = { .clientid = clp->cl_clientid,
6463 .id = lsp->ls_seqid.owner_id,
6464 .s_dev = server->s_dev };
6465 struct nfs4_lock_waiter waiter = { .task = current,
6466 .inode = state->inode,
6467 .owner = &owner,
6468 .notified = false };
6469 wait_queue_t wait;
6470
6471 /* Don't bother with waitqueue if we don't expect a callback */
6472 if (!test_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags))
6473 return nfs4_retry_setlk_simple(state, cmd, request);
6474
6475 init_wait(&wait);
6476 wait.private = &waiter;
6477 wait.func = nfs4_wake_lock_waiter;
6478 add_wait_queue(q, &wait);
6479
6480 while(!signalled()) {
6481 status = nfs4_proc_setlk(state, cmd, request);
6482 if ((status != -EAGAIN) || IS_SETLK(cmd))
6483 break;
6484
6485 status = -ERESTARTSYS;
6486 spin_lock_irqsave(&q->lock, flags);
6487 if (waiter.notified) {
6488 spin_unlock_irqrestore(&q->lock, flags);
6489 continue;
6490 }
6491 set_current_state(TASK_INTERRUPTIBLE);
6492 spin_unlock_irqrestore(&q->lock, flags);
6493
6494 freezable_schedule_timeout_interruptible(NFS4_LOCK_MAXTIMEOUT);
6495 }
6496
6497 finish_wait(q, &wait);
6498 return status;
6499}
6500#else /* !CONFIG_NFS_V4_1 */
6501static inline int
6502nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6503{
6504 return nfs4_retry_setlk_simple(state, cmd, request);
6505}
6506#endif
6507
1da177e4
LT		 6508static int
6509nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
6510{
6511 struct nfs_open_context *ctx;
6512 struct nfs4_state *state;
1da177e4
LT		 6513 int status;
6514
6515 /* verify open state */
cd3758e3 6516 ctx = nfs_file_open_context(filp);
1da177e4
LT		 6517 state = ctx->state;
6518
d953126a
TM		 6519 if (IS_GETLK(cmd)) {
6520 if (state != NULL)
6521 return nfs4_proc_getlk(state, F_GETLK, request);
6522 return 0;
6523 }
1da177e4
LT		 6524
6525 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
6526 return -EINVAL;
6527
d953126a
TM		 6528 if (request->fl_type == F_UNLCK) {
6529 if (state != NULL)
6530 return nfs4_proc_unlck(state, cmd, request);
6531 return 0;
6532 }
1da177e4 6533
d953126a
TM		 6534 if (state == NULL)
6535 return -ENOLCK;
1ea67dbd
JL		 6536
6537 if ((request->fl_flags & FL_POSIX) &&
6538 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
6539 return -ENOLCK;
6540
1ea67dbd
JL		 6541 status = nfs4_set_lock_state(state, request);
6542 if (status != 0)
6543 return status;
6544
d2f3a7f9 6545 return nfs4_retry_setlk(state, cmd, request);
1da177e4
LT		 6546}
6547
db4f2e63 6548int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 6549{
6550 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 6551 int err;
6552
6553 err = nfs4_set_lock_state(state, fl);
6554 if (err != 0)
db4f2e63 6555 return err;
4a706fa0 6556 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 6557 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 6558}
6b3b5496 6559
cf470c3e
TM		 6560struct nfs_release_lockowner_data {
6561 struct nfs4_lock_state *lsp;
5ae67c4f 6562 struct nfs_server *server;
cf470c3e 6563 struct nfs_release_lockowner_args args;
b7e63a10 6564 struct nfs_release_lockowner_res res;
60ea6812 6565 unsigned long timestamp;
cf470c3e
TM		 6566};
6567
fbd4bfd1
CL		 6568static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
6569{
6570 struct nfs_release_lockowner_data *data = calldata;
5b53dc88 6571 struct nfs_server *server = data->server;
7981c8a6
AS		 6572 nfs4_setup_sequence(server->nfs_client, &data->args.seq_args,
6573 &data->res.seq_res, task);
5b53dc88 6574 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
60ea6812 6575 data->timestamp = jiffies;
fbd4bfd1
CL		 6576}
6577
6578static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
6579{
6580 struct nfs_release_lockowner_data *data = calldata;
60ea6812
CL		 6581 struct nfs_server *server = data->server;
6582
b7e63a10 6583 nfs40_sequence_done(task, &data->res.seq_res);
60ea6812
CL		 6584
6585 switch (task->tk_status) {
6586 case 0:
6587 renew_lease(server, data->timestamp);
6588 break;
6589 case -NFS4ERR_STALE_CLIENTID:
6590 case -NFS4ERR_EXPIRED:
5b53dc88
KM		 6591 nfs4_schedule_lease_recovery(server->nfs_client);
6592 break;
60ea6812
CL		 6593 case -NFS4ERR_LEASE_MOVED:
6594 case -NFS4ERR_DELAY:
8478eaa1
N		 6595 if (nfs4_async_handle_error(task, server,
6596 NULL, NULL) == -EAGAIN)
60ea6812
CL		 6597 rpc_restart_call_prepare(task);
6598 }
fbd4bfd1
CL		 6599}
6600
d3c7b7cc
TM		 6601static void nfs4_release_lockowner_release(void *calldata)
6602{
cf470c3e 6603 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 6604 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 6605 kfree(calldata);
6606}
6607
17280175 6608static const struct rpc_call_ops nfs4_release_lockowner_ops = {
fbd4bfd1
CL		 6609 .rpc_call_prepare = nfs4_release_lockowner_prepare,
6610 .rpc_call_done = nfs4_release_lockowner_done,
d3c7b7cc
TM		 6611 .rpc_release = nfs4_release_lockowner_release,
6612};
6613
f1cdae87
JL		 6614static void
6615nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 6616{
cf470c3e 6617 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 6618 struct rpc_message msg = {
6619 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
6620 };
6621
6622 if (server->nfs_client->cl_mvops->minor_version != 0)
f1cdae87 6623 return;
fbd4bfd1 6624
cf470c3e
TM		 6625 data = kmalloc(sizeof(*data), GFP_NOFS);
6626 if (!data)
f1cdae87 6627 return;
cf470c3e 6628 data->lsp = lsp;
5ae67c4f 6629 data->server = server;
cf470c3e
TM		 6630 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6631 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
6632 data->args.lock_owner.s_dev = server->s_dev;
fbd4bfd1 6633
cf470c3e 6634 msg.rpc_argp = &data->args;
b7e63a10
TM		 6635 msg.rpc_resp = &data->res;
6636 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
cf470c3e 6637 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
d3c7b7cc
TM		 6638}
6639
aa1870af
BF		 6640#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
6641
d9a82a04 6642static int nfs4_xattr_set_nfs4_acl(const struct xattr_handler *handler,
59301226
AV		 6643 struct dentry *unused, struct inode *inode,
6644 const char *key, const void *buf,
6645 size_t buflen, int flags)
6b3b5496 6646{
59301226 6647 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 6648}
6649
d9a82a04 6650static int nfs4_xattr_get_nfs4_acl(const struct xattr_handler *handler,
b296821a
AV		 6651 struct dentry *unused, struct inode *inode,
6652 const char *key, void *buf, size_t buflen)
6b3b5496 6653{
b296821a 6654 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 6655}
6656
764a5c6b 6657static bool nfs4_xattr_list_nfs4_acl(struct dentry *dentry)
6b3b5496 6658{
764a5c6b 6659 return nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry)));
6b3b5496
BF		 6660}
6661
c9bccef6 6662#ifdef CONFIG_NFS_V4_SECURITY_LABEL
c9bccef6 6663
d9a82a04 6664static int nfs4_xattr_set_nfs4_label(const struct xattr_handler *handler,
59301226
AV		 6665 struct dentry *unused, struct inode *inode,
6666 const char *key, const void *buf,
6667 size_t buflen, int flags)
c9bccef6
DQ		 6668{
6669 if (security_ismaclabel(key))
59301226 6670 return nfs4_set_security_label(inode, buf, buflen);
c9bccef6
DQ		 6671
6672 return -EOPNOTSUPP;
6673}
6674
d9a82a04 6675static int nfs4_xattr_get_nfs4_label(const struct xattr_handler *handler,
b296821a
AV		 6676 struct dentry *unused, struct inode *inode,
6677 const char *key, void *buf, size_t buflen)
c9bccef6
DQ		 6678{
6679 if (security_ismaclabel(key))
b296821a 6680 return nfs4_get_security_label(inode, buf, buflen);
c9bccef6
DQ		 6681 return -EOPNOTSUPP;
6682}
6683
c4803c49
AG		 6684static ssize_t
6685nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
c9bccef6 6686{
c4803c49 6687 int len = 0;
c9bccef6 6688
c4803c49
AG		 6689 if (nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) {
6690 len = security_inode_listsecurity(inode, list, list_len);
6691 if (list_len && len > list_len)
6692 return -ERANGE;
c9bccef6
DQ		 6693 }
6694 return len;
6695}
6696
6697static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
6698 .prefix = XATTR_SECURITY_PREFIX,
c9bccef6
DQ		 6699 .get = nfs4_xattr_get_nfs4_label,
6700 .set = nfs4_xattr_set_nfs4_label,
6701};
c9bccef6 6702
c4803c49
AG		 6703#else
6704
6705static ssize_t
6706nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
6707{
6708 return 0;
6709}
6710
6711#endif
c9bccef6 6712
533eb461
AA		 6713/*
6714 * nfs_fhget will use either the mounted_on_fileid or the fileid
6715 */
69aaaae1
TM		 6716static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6717{
533eb461
AA		 6718 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6719 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6720 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 6721 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 6722 return;
6723
6724 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 6725 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 6726 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6727 fattr->nlink = 2;
6728}
6729
f05d147f
BS		 6730static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6731 const struct qstr *name,
6732 struct nfs4_fs_locations *fs_locations,
6733 struct page *page)
683b57b4
TM		 6734{
6735 struct nfs_server *server = NFS_SERVER(dir);
a09df2ca 6736 u32 bitmask[3] = {
361e624f 6737 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 6738 };
6739 struct nfs4_fs_locations_arg args = {
6740 .dir_fh = NFS_FH(dir),
c228fd3a 6741 .name = name,
683b57b4
TM		 6742 .page = page,
6743 .bitmask = bitmask,
6744 };
22958463
BH		 6745 struct nfs4_fs_locations_res res = {
6746 .fs_locations = fs_locations,
6747 };
683b57b4
TM		 6748 struct rpc_message msg = {
6749 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6750 .rpc_argp = &args,
22958463 6751 .rpc_resp = &res,
683b57b4
TM		 6752 };
6753 int status;
6754
3110ff80 6755 dprintk("%s: start\n", __func__);
533eb461
AA		 6756
6757 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6758 * is not supported */
6759 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6760 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6761 else
6762 bitmask[0] |= FATTR4_WORD0_FILEID;
6763
c228fd3a 6764 nfs_fattr_init(&fs_locations->fattr);
683b57b4 6765 fs_locations->server = server;
830b8e33 6766 fs_locations->nlocations = 0;
f05d147f 6767 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 6768 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 6769 return status;
6770}
6771
f05d147f
BS		 6772int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6773 const struct qstr *name,
6774 struct nfs4_fs_locations *fs_locations,
6775 struct page *page)
db0a9593
BS		 6776{
6777 struct nfs4_exception exception = { };
6778 int err;
6779 do {
078ea3df
TM		 6780 err = _nfs4_proc_fs_locations(client, dir, name,
6781 fs_locations, page);
6782 trace_nfs4_get_fs_locations(dir, name, err);
6783 err = nfs4_handle_exception(NFS_SERVER(dir), err,
db0a9593
BS		 6784 &exception);
6785 } while (exception.retry);
6786 return err;
6787}
6788
b03d735b
CL		 6789/*
6790 * This operation also signals the server that this client is
6791 * performing migration recovery. The server can stop returning
6792 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6793 * appended to this compound to identify the client ID which is
6794 * performing recovery.
6795 */
6796static int _nfs40_proc_get_locations(struct inode *inode,
6797 struct nfs4_fs_locations *locations,
6798 struct page *page, struct rpc_cred *cred)
6799{
6800 struct nfs_server *server = NFS_SERVER(inode);
6801 struct rpc_clnt *clnt = server->client;
6802 u32 bitmask[2] = {
6803 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6804 };
6805 struct nfs4_fs_locations_arg args = {
6806 .clientid = server->nfs_client->cl_clientid,
6807 .fh = NFS_FH(inode),
6808 .page = page,
6809 .bitmask = bitmask,
6810 .migration = 1, /* skip LOOKUP */
6811 .renew = 1, /* append RENEW */
6812 };
6813 struct nfs4_fs_locations_res res = {
6814 .fs_locations = locations,
6815 .migration = 1,
6816 .renew = 1,
6817 };
6818 struct rpc_message msg = {
6819 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6820 .rpc_argp = &args,
6821 .rpc_resp = &res,
6822 .rpc_cred = cred,
6823 };
6824 unsigned long now = jiffies;
6825 int status;
6826
6827 nfs_fattr_init(&locations->fattr);
6828 locations->server = server;
6829 locations->nlocations = 0;
6830
6831 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6832 nfs4_set_sequence_privileged(&args.seq_args);
6833 status = nfs4_call_sync_sequence(clnt, server, &msg,
6834 &args.seq_args, &res.seq_res);
6835 if (status)
6836 return status;
6837
6838 renew_lease(server, now);
6839 return 0;
6840}
6841
6842#ifdef CONFIG_NFS_V4_1
6843
6844/*
6845 * This operation also signals the server that this client is
6846 * performing migration recovery. The server can stop asserting
6847 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6848 * performing this operation is identified in the SEQUENCE
6849 * operation in this compound.
6850 *
6851 * When the client supports GETATTR(fs_locations_info), it can
6852 * be plumbed in here.
6853 */
6854static int _nfs41_proc_get_locations(struct inode *inode,
6855 struct nfs4_fs_locations *locations,
6856 struct page *page, struct rpc_cred *cred)
6857{
6858 struct nfs_server *server = NFS_SERVER(inode);
6859 struct rpc_clnt *clnt = server->client;
6860 u32 bitmask[2] = {
6861 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6862 };
6863 struct nfs4_fs_locations_arg args = {
6864 .fh = NFS_FH(inode),
6865 .page = page,
6866 .bitmask = bitmask,
6867 .migration = 1, /* skip LOOKUP */
6868 };
6869 struct nfs4_fs_locations_res res = {
6870 .fs_locations = locations,
6871 .migration = 1,
6872 };
6873 struct rpc_message msg = {
6874 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6875 .rpc_argp = &args,
6876 .rpc_resp = &res,
6877 .rpc_cred = cred,
6878 };
6879 int status;
6880
6881 nfs_fattr_init(&locations->fattr);
6882 locations->server = server;
6883 locations->nlocations = 0;
6884
6885 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6886 nfs4_set_sequence_privileged(&args.seq_args);
6887 status = nfs4_call_sync_sequence(clnt, server, &msg,
6888 &args.seq_args, &res.seq_res);
6889 if (status == NFS4_OK &&
6890 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6891 status = -NFS4ERR_LEASE_MOVED;
6892 return status;
6893}
6894
6895#endif /* CONFIG_NFS_V4_1 */
6896
6897/**
6898 * nfs4_proc_get_locations - discover locations for a migrated FSID
6899 * @inode: inode on FSID that is migrating
6900 * @locations: result of query
6901 * @page: buffer
6902 * @cred: credential to use for this operation
6903 *
6904 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6905 * operation failed, or a negative errno if a local error occurred.
6906 *
6907 * On success, "locations" is filled in, but if the server has
6908 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6909 * asserted.
6910 *
6911 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6912 * from this client that require migration recovery.
6913 */
6914int nfs4_proc_get_locations(struct inode *inode,
6915 struct nfs4_fs_locations *locations,
6916 struct page *page, struct rpc_cred *cred)
6917{
6918 struct nfs_server *server = NFS_SERVER(inode);
6919 struct nfs_client *clp = server->nfs_client;
6920 const struct nfs4_mig_recovery_ops *ops =
6921 clp->cl_mvops->mig_recovery_ops;
6922 struct nfs4_exception exception = { };
6923 int status;
6924
6925 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6926 (unsigned long long)server->fsid.major,
6927 (unsigned long long)server->fsid.minor,
6928 clp->cl_hostname);
6929 nfs_display_fhandle(NFS_FH(inode), __func__);
6930
6931 do {
6932 status = ops->get_locations(inode, locations, page, cred);
6933 if (status != -NFS4ERR_DELAY)
6934 break;
6935 nfs4_handle_exception(server, status, &exception);
6936 } while (exception.retry);
6937 return status;
6938}
6939
44c99933
CL		 6940/*
6941 * This operation also signals the server that this client is
6942 * performing "lease moved" recovery. The server can stop
6943 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6944 * is appended to this compound to identify the client ID which is
6945 * performing recovery.
6946 */
6947static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6948{
6949 struct nfs_server *server = NFS_SERVER(inode);
6950 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6951 struct rpc_clnt *clnt = server->client;
6952 struct nfs4_fsid_present_arg args = {
6953 .fh = NFS_FH(inode),
6954 .clientid = clp->cl_clientid,
6955 .renew = 1, /* append RENEW */
6956 };
6957 struct nfs4_fsid_present_res res = {
6958 .renew = 1,
6959 };
6960 struct rpc_message msg = {
6961 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6962 .rpc_argp = &args,
6963 .rpc_resp = &res,
6964 .rpc_cred = cred,
6965 };
6966 unsigned long now = jiffies;
6967 int status;
6968
6969 res.fh = nfs_alloc_fhandle();
6970 if (res.fh == NULL)
6971 return -ENOMEM;
6972
6973 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6974 nfs4_set_sequence_privileged(&args.seq_args);
6975 status = nfs4_call_sync_sequence(clnt, server, &msg,
6976 &args.seq_args, &res.seq_res);
6977 nfs_free_fhandle(res.fh);
6978 if (status)
6979 return status;
6980
6981 do_renew_lease(clp, now);
6982 return 0;
6983}
6984
6985#ifdef CONFIG_NFS_V4_1
6986
6987/*
6988 * This operation also signals the server that this client is
6989 * performing "lease moved" recovery. The server can stop asserting
6990 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
6991 * this operation is identified in the SEQUENCE operation in this
6992 * compound.
6993 */
6994static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6995{
6996 struct nfs_server *server = NFS_SERVER(inode);
6997 struct rpc_clnt *clnt = server->client;
6998 struct nfs4_fsid_present_arg args = {
6999 .fh = NFS_FH(inode),
7000 };
7001 struct nfs4_fsid_present_res res = {
7002 };
7003 struct rpc_message msg = {
7004 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
7005 .rpc_argp = &args,
7006 .rpc_resp = &res,
7007 .rpc_cred = cred,
7008 };
7009 int status;
7010
7011 res.fh = nfs_alloc_fhandle();
7012 if (res.fh == NULL)
7013 return -ENOMEM;
7014
7015 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
7016 nfs4_set_sequence_privileged(&args.seq_args);
7017 status = nfs4_call_sync_sequence(clnt, server, &msg,
7018 &args.seq_args, &res.seq_res);
7019 nfs_free_fhandle(res.fh);
7020 if (status == NFS4_OK &&
7021 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
7022 status = -NFS4ERR_LEASE_MOVED;
7023 return status;
7024}
7025
7026#endif /* CONFIG_NFS_V4_1 */
7027
7028/**
7029 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
7030 * @inode: inode on FSID to check
7031 * @cred: credential to use for this operation
7032 *
7033 * Server indicates whether the FSID is present, moved, or not
7034 * recognized. This operation is necessary to clear a LEASE_MOVED
7035 * condition for this client ID.
7036 *
7037 * Returns NFS4_OK if the FSID is present on this server,
7038 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
7039 * NFS4ERR code if some error occurred on the server, or a
7040 * negative errno if a local failure occurred.
7041 */
7042int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
7043{
7044 struct nfs_server *server = NFS_SERVER(inode);
7045 struct nfs_client *clp = server->nfs_client;
7046 const struct nfs4_mig_recovery_ops *ops =
7047 clp->cl_mvops->mig_recovery_ops;
7048 struct nfs4_exception exception = { };
7049 int status;
7050
7051 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
7052 (unsigned long long)server->fsid.major,
7053 (unsigned long long)server->fsid.minor,
7054 clp->cl_hostname);
7055 nfs_display_fhandle(NFS_FH(inode), __func__);
7056
7057 do {
7058 status = ops->fsid_present(inode, cred);
7059 if (status != -NFS4ERR_DELAY)
7060 break;
7061 nfs4_handle_exception(server, status, &exception);
7062 } while (exception.retry);
7063 return status;
7064}
7065
5ec16a85 7066/**
a5250def
WAA		 7067 * If 'use_integrity' is true and the state managment nfs_client
7068 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
7069 * and the machine credential as per RFC3530bis and RFC5661 Security
7070 * Considerations sections. Otherwise, just use the user cred with the
7071 * filesystem's rpc_client.
5ec16a85 7072 */
a5250def 7073static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
5a5ea0d4
BS		 7074{
7075 int status;
7076 struct nfs4_secinfo_arg args = {
7077 .dir_fh = NFS_FH(dir),
7078 .name = name,
7079 };
7080 struct nfs4_secinfo_res res = {
7081 .flavors = flavors,
7082 };
7083 struct rpc_message msg = {
7084 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
7085 .rpc_argp = &args,
7086 .rpc_resp = &res,
7087 };
a5250def 7088 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
7cb852df 7089 struct rpc_cred *cred = NULL;
a5250def
WAA		 7090
7091 if (use_integrity) {
7092 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
7cb852df
WAA		 7093 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
7094 msg.rpc_cred = cred;
a5250def 7095 }
5a5ea0d4
BS		 7096
7097 dprintk("NFS call secinfo %s\n", name->name);
8b5bee2e
WAA		 7098
7099 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
7100 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
7101
a5250def
WAA		 7102 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
7103 &res.seq_res, 0);
5a5ea0d4 7104 dprintk("NFS reply secinfo: %d\n", status);
a5250def 7105
7cb852df
WAA		 7106 if (cred)
7107 put_rpccred(cred);
a5250def 7108
5a5ea0d4
BS		 7109 return status;
7110}
7111
72de53ec
BS		 7112int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
7113 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 7114{
7115 struct nfs4_exception exception = { };
7116 int err;
7117 do {
a5250def
WAA		 7118 err = -NFS4ERR_WRONGSEC;
7119
7120 /* try to use integrity protection with machine cred */
7121 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
7122 err = _nfs4_proc_secinfo(dir, name, flavors, true);
7123
7124 /*
7125 * if unable to use integrity protection, or SECINFO with
7126 * integrity protection returns NFS4ERR_WRONGSEC (which is
7127 * disallowed by spec, but exists in deployed servers) use
7128 * the current filesystem's rpc_client and the user cred.
7129 */
7130 if (err == -NFS4ERR_WRONGSEC)
7131 err = _nfs4_proc_secinfo(dir, name, flavors, false);
7132
078ea3df
TM		 7133 trace_nfs4_secinfo(dir, name, err);
7134 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5a5ea0d4
BS		 7135 &exception);
7136 } while (exception.retry);
7137 return err;
7138}
7139
557134a3 7140#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 7141/*
7142 * Check the exchange flags returned by the server for invalid flags, having
7143 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
7144 * DS flags set.
7145 */
7146static int nfs4_check_cl_exchange_flags(u32 flags)
7147{
7148 if (flags & ~EXCHGID4_FLAG_MASK_R)
7149 goto out_inval;
7150 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
7151 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
7152 goto out_inval;
7153 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
7154 goto out_inval;
7155 return NFS_OK;
7156out_inval:
7157 return -NFS4ERR_INVAL;
7158}
7159
78fe0f41 7160static bool
79d4e1f0
CL		 7161nfs41_same_server_scope(struct nfs41_server_scope *a,
7162 struct nfs41_server_scope *b)
78fe0f41 7163{
49ad0145
AS		 7164 if (a->server_scope_sz != b->server_scope_sz)
7165 return false;
7166 return memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0;
78fe0f41
WAA		 7167}
7168
02a95dee
AA		 7169static void
7170nfs4_bind_one_conn_to_session_done(struct rpc_task *task, void *calldata)
7171{
7172}
7173
7174static const struct rpc_call_ops nfs4_bind_one_conn_to_session_ops = {
7175 .rpc_call_done = &nfs4_bind_one_conn_to_session_done,
7176};
7177
7c44f1ae 7178/*
d9ddbf5d 7179 * nfs4_proc_bind_one_conn_to_session()
7c44f1ae
WAA		 7180 *
7181 * The 4.1 client currently uses the same TCP connection for the
7182 * fore and backchannel.
7183 */
d9ddbf5d
TM		 7184static
7185int nfs4_proc_bind_one_conn_to_session(struct rpc_clnt *clnt,
7186 struct rpc_xprt *xprt,
7187 struct nfs_client *clp,
7188 struct rpc_cred *cred)
7c44f1ae
WAA		 7189{
7190 int status;
71a097c6
TM		 7191 struct nfs41_bind_conn_to_session_args args = {
7192 .client = clp,
7193 .dir = NFS4_CDFC4_FORE_OR_BOTH,
7194 };
7c44f1ae
WAA		 7195 struct nfs41_bind_conn_to_session_res res;
7196 struct rpc_message msg = {
7197 .rpc_proc =
7198 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
71a097c6 7199 .rpc_argp = &args,
7c44f1ae 7200 .rpc_resp = &res,
2cf047c9 7201 .rpc_cred = cred,
7c44f1ae 7202 };
d9ddbf5d
TM		 7203 struct rpc_task_setup task_setup_data = {
7204 .rpc_client = clnt,
7205 .rpc_xprt = xprt,
02a95dee 7206 .callback_ops = &nfs4_bind_one_conn_to_session_ops,
d9ddbf5d
TM		 7207 .rpc_message = &msg,
7208 .flags = RPC_TASK_TIMEOUT,
7209 };
7210 struct rpc_task *task;
7c44f1ae 7211
71a097c6
TM		 7212 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id);
7213 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN))
7214 args.dir = NFS4_CDFC4_FORE;
7c44f1ae 7215
d9ddbf5d
TM		 7216 /* Do not set the backchannel flag unless this is clnt->cl_xprt */
7217 if (xprt != rcu_access_pointer(clnt->cl_xprt))
7218 args.dir = NFS4_CDFC4_FORE;
7219
7220 task = rpc_run_task(&task_setup_data);
7221 if (!IS_ERR(task)) {
7222 status = task->tk_status;
7223 rpc_put_task(task);
7224 } else
7225 status = PTR_ERR(task);
c6d01c6f 7226 trace_nfs4_bind_conn_to_session(clp, status);
7c44f1ae 7227 if (status == 0) {
71a097c6 7228 if (memcmp(res.sessionid.data,
7c44f1ae
WAA		 7229 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
7230 dprintk("NFS: %s: Session ID mismatch\n", __func__);
c7ae7639 7231 return -EIO;
7c44f1ae 7232 }
71a097c6 7233 if ((res.dir & args.dir) != res.dir || res.dir == 0) {
7c44f1ae
WAA		 7234 dprintk("NFS: %s: Unexpected direction from server\n",
7235 __func__);
c7ae7639 7236 return -EIO;
7c44f1ae 7237 }
71a097c6 7238 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) {
7c44f1ae
WAA		 7239 dprintk("NFS: %s: Server returned RDMA mode = true\n",
7240 __func__);
c7ae7639 7241 return -EIO;
7c44f1ae
WAA		 7242 }
7243 }
c7ae7639 7244
7c44f1ae
WAA		 7245 return status;
7246}
7247
d9ddbf5d
TM		 7248struct rpc_bind_conn_calldata {
7249 struct nfs_client *clp;
7250 struct rpc_cred *cred;
7251};
7252
7253static int
7254nfs4_proc_bind_conn_to_session_callback(struct rpc_clnt *clnt,
7255 struct rpc_xprt *xprt,
7256 void *calldata)
7257{
7258 struct rpc_bind_conn_calldata *p = calldata;
7259
7260 return nfs4_proc_bind_one_conn_to_session(clnt, xprt, p->clp, p->cred);
7261}
7262
7263int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7264{
7265 struct rpc_bind_conn_calldata data = {
7266 .clp = clp,
7267 .cred = cred,
7268 };
7269 return rpc_clnt_iterate_for_each_xprt(clp->cl_rpcclient,
7270 nfs4_proc_bind_conn_to_session_callback, &data);
7271}
7272
99fe60d0 7273/*
fa940720
WAA		 7274 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
7275 * and operations we'd like to see to enable certain features in the allow map
2031cd1a
WAA		 7276 */
7277static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
7278 .how = SP4_MACH_CRED,
7279 .enforce.u.words = {
7280 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
7281 1 << (OP_EXCHANGE_ID - 32) |
7282 1 << (OP_CREATE_SESSION - 32) |
7283 1 << (OP_DESTROY_SESSION - 32) |
7284 1 << (OP_DESTROY_CLIENTID - 32)
fa940720
WAA		 7285 },
7286 .allow.u.words = {
7287 [0] = 1 << (OP_CLOSE) |
99ade3c7 7288 1 << (OP_OPEN_DOWNGRADE) |
a0279625 7289 1 << (OP_LOCKU) |
99ade3c7 7290 1 << (OP_DELEGRETURN) |
a0279625 7291 1 << (OP_COMMIT),
8b5bee2e 7292 [1] = 1 << (OP_SECINFO - 32) |
3787d506 7293 1 << (OP_SECINFO_NO_NAME - 32) |
99ade3c7 7294 1 << (OP_LAYOUTRETURN - 32) |
3787d506 7295 1 << (OP_TEST_STATEID - 32) |
a0279625
WAA		 7296 1 << (OP_FREE_STATEID - 32) |
7297 1 << (OP_WRITE - 32)
2031cd1a
WAA		 7298 }
7299};
7300
7301/*
7302 * Select the state protection mode for client `clp' given the server results
7303 * from exchange_id in `sp'.
99fe60d0 7304 *
2031cd1a
WAA		 7305 * Returns 0 on success, negative errno otherwise.
7306 */
7307static int nfs4_sp4_select_mode(struct nfs_client *clp,
7308 struct nfs41_state_protection *sp)
7309{
7310 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
7311 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
7312 1 << (OP_EXCHANGE_ID - 32) |
7313 1 << (OP_CREATE_SESSION - 32) |
7314 1 << (OP_DESTROY_SESSION - 32) |
7315 1 << (OP_DESTROY_CLIENTID - 32)
7316 };
7317 unsigned int i;
7318
7319 if (sp->how == SP4_MACH_CRED) {
7320 /* Print state protect result */
7321 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
7322 for (i = 0; i <= LAST_NFS4_OP; i++) {
7323 if (test_bit(i, sp->enforce.u.longs))
7324 dfprintk(MOUNT, " enforce op %d\n", i);
7325 if (test_bit(i, sp->allow.u.longs))
7326 dfprintk(MOUNT, " allow op %d\n", i);
7327 }
7328
7329 /* make sure nothing is on enforce list that isn't supported */
7330 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
7331 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
7332 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
7333 return -EINVAL;
7334 }
7335 }
7336
7337 /*
7338 * Minimal mode - state operations are allowed to use machine
7339 * credential. Note this already happens by default, so the
7340 * client doesn't have to do anything more than the negotiation.
7341 *
7342 * NOTE: we don't care if EXCHANGE_ID is in the list -
7343 * we're already using the machine cred for exchange_id
7344 * and will never use a different cred.
7345 */
7346 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
7347 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
7348 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
7349 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
7350 dfprintk(MOUNT, "sp4_mach_cred:\n");
7351 dfprintk(MOUNT, " minimal mode enabled\n");
7352 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
7353 } else {
7354 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
7355 return -EINVAL;
7356 }
fa940720
WAA		 7357
7358 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
99ade3c7
AE		 7359 test_bit(OP_OPEN_DOWNGRADE, sp->allow.u.longs) &&
7360 test_bit(OP_DELEGRETURN, sp->allow.u.longs) &&
fa940720
WAA		 7361 test_bit(OP_LOCKU, sp->allow.u.longs)) {
7362 dfprintk(MOUNT, " cleanup mode enabled\n");
7363 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
7364 }
8b5bee2e 7365
99ade3c7
AE		 7366 if (test_bit(OP_LAYOUTRETURN, sp->allow.u.longs)) {
7367 dfprintk(MOUNT, " pnfs cleanup mode enabled\n");
7368 set_bit(NFS_SP4_MACH_CRED_PNFS_CLEANUP,
7369 &clp->cl_sp4_flags);
7370 }
7371
8b5bee2e
WAA		 7372 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
7373 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
7374 dfprintk(MOUNT, " secinfo mode enabled\n");
7375 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
7376 }
3787d506
WAA		 7377
7378 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
7379 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
7380 dfprintk(MOUNT, " stateid mode enabled\n");
7381 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
7382 }
8c21c62c
WAA		 7383
7384 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
7385 dfprintk(MOUNT, " write mode enabled\n");
7386 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
7387 }
7388
7389 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
7390 dfprintk(MOUNT, " commit mode enabled\n");
7391 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
7392 }
2031cd1a
WAA		 7393 }
7394
7395 return 0;
7396}
7397
8d89bd70
AA		 7398struct nfs41_exchange_id_data {
7399 struct nfs41_exchange_id_res res;
7400 struct nfs41_exchange_id_args args;
ad0849a7 7401 struct rpc_xprt *xprt;
8d89bd70
AA		 7402 int rpc_status;
7403};
7404
7405static void nfs4_exchange_id_done(struct rpc_task *task, void *data)
7406{
7407 struct nfs41_exchange_id_data *cdata =
7408 (struct nfs41_exchange_id_data *)data;
7409 struct nfs_client *clp = cdata->args.client;
7410 int status = task->tk_status;
7411
7412 trace_nfs4_exchange_id(clp, status);
7413
7414 if (status == 0)
7415 status = nfs4_check_cl_exchange_flags(cdata->res.flags);
ad0849a7
AA		 7416
7417 if (cdata->xprt && status == 0) {
7418 status = nfs4_detect_session_trunking(clp, &cdata->res,
7419 cdata->xprt);
7420 goto out;
7421 }
7422
8d89bd70
AA		 7423 if (status == 0)
7424 status = nfs4_sp4_select_mode(clp, &cdata->res.state_protect);
7425
7426 if (status == 0) {
7427 clp->cl_clientid = cdata->res.clientid;
7428 clp->cl_exchange_flags = cdata->res.flags;
838edb94 7429 clp->cl_seqid = cdata->res.seqid;
8d89bd70 7430 /* Client ID is not confirmed */
838edb94 7431 if (!(cdata->res.flags & EXCHGID4_FLAG_CONFIRMED_R))
8d89bd70 7432 clear_bit(NFS4_SESSION_ESTABLISHED,
838edb94 7433 &clp->cl_session->session_state);
8d89bd70
AA		 7434
7435 kfree(clp->cl_serverowner);
7436 clp->cl_serverowner = cdata->res.server_owner;
7437 cdata->res.server_owner = NULL;
7438
7439 /* use the most recent implementation id */
7440 kfree(clp->cl_implid);
7441 clp->cl_implid = cdata->res.impl_id;
7442 cdata->res.impl_id = NULL;
7443
7444 if (clp->cl_serverscope != NULL &&
7445 !nfs41_same_server_scope(clp->cl_serverscope,
7446 cdata->res.server_scope)) {
7447 dprintk("%s: server_scope mismatch detected\n",
7448 __func__);
7449 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
7450 kfree(clp->cl_serverscope);
7451 clp->cl_serverscope = NULL;
7452 }
7453
7454 if (clp->cl_serverscope == NULL) {
7455 clp->cl_serverscope = cdata->res.server_scope;
7456 cdata->res.server_scope = NULL;
7457 }
ad0849a7
AA		 7458 /* Save the EXCHANGE_ID verifier session trunk tests */
7459 memcpy(clp->cl_confirm.data, cdata->args.verifier->data,
7460 sizeof(clp->cl_confirm.data));
8d89bd70 7461 }
ad0849a7 7462out:
8d89bd70 7463 cdata->rpc_status = status;
ad0849a7 7464 return;
8d89bd70
AA		 7465}
7466
7467static void nfs4_exchange_id_release(void *data)
7468{
7469 struct nfs41_exchange_id_data *cdata =
7470 (struct nfs41_exchange_id_data *)data;
7471
ad0849a7
AA		 7472 if (cdata->xprt) {
7473 xprt_put(cdata->xprt);
7474 rpc_clnt_xprt_switch_put(cdata->args.client->cl_rpcclient);
7475 }
63513232 7476 nfs_put_client(cdata->args.client);
8d89bd70
AA		 7477 kfree(cdata->res.impl_id);
7478 kfree(cdata->res.server_scope);
7479 kfree(cdata->res.server_owner);
7480 kfree(cdata);
7481}
7482
7483static const struct rpc_call_ops nfs4_exchange_id_call_ops = {
7484 .rpc_call_done = nfs4_exchange_id_done,
7485 .rpc_release = nfs4_exchange_id_release,
7486};
7487
2031cd1a
WAA		 7488/*
7489 * _nfs4_proc_exchange_id()
6bbb4ae8 7490 *
2031cd1a 7491 * Wrapper for EXCHANGE_ID operation.
99fe60d0 7492 */
2031cd1a 7493static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
ad0849a7 7494 u32 sp4_how, struct rpc_xprt *xprt)
99fe60d0
BH		 7495{
7496 nfs4_verifier verifier;
99fe60d0
BH		 7497 struct rpc_message msg = {
7498 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
99fe60d0
BH		 7499 .rpc_cred = cred,
7500 };
8d89bd70
AA		 7501 struct rpc_task_setup task_setup_data = {
7502 .rpc_client = clp->cl_rpcclient,
7503 .callback_ops = &nfs4_exchange_id_call_ops,
7504 .rpc_message = &msg,
7505 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
7506 };
7507 struct nfs41_exchange_id_data *calldata;
7508 struct rpc_task *task;
e917f0d1 7509 int status;
8d89bd70
AA		 7510
7511 if (!atomic_inc_not_zero(&clp->cl_count))
e917f0d1 7512 return -EIO;
8d89bd70 7513
8d89bd70 7514 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
5c737cb2
DW		 7515 if (!calldata) {
7516 nfs_put_client(clp);
e917f0d1 7517 return -ENOMEM;
5c737cb2 7518 }
99fe60d0 7519
ad0849a7
AA		 7520 if (!xprt)
7521 nfs4_init_boot_verifier(clp, &verifier);
873e3851
JL		 7522
7523 status = nfs4_init_uniform_client_string(clp);
7524 if (status)
8d89bd70 7525 goto out_calldata;
3a6bb738 7526
8d89bd70
AA		 7527 calldata->res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
7528 GFP_NOFS);
7529 status = -ENOMEM;
7530 if (unlikely(calldata->res.server_owner == NULL))
7531 goto out_calldata;
78fe0f41 7532
8d89bd70 7533 calldata->res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 7534 GFP_NOFS);
8d89bd70 7535 if (unlikely(calldata->res.server_scope == NULL))
acdeb69d 7536 goto out_server_owner;
78fe0f41 7537
8d89bd70
AA		 7538 calldata->res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
7539 if (unlikely(calldata->res.impl_id == NULL))
7d2ed9ac 7540 goto out_server_scope;
7d2ed9ac 7541
2031cd1a
WAA		 7542 switch (sp4_how) {
7543 case SP4_NONE:
8d89bd70 7544 calldata->args.state_protect.how = SP4_NONE;
2031cd1a
WAA		 7545 break;
7546
7547 case SP4_MACH_CRED:
8d89bd70 7548 calldata->args.state_protect = nfs4_sp4_mach_cred_request;
2031cd1a
WAA		 7549 break;
7550
7551 default:
7552 /* unsupported! */
7553 WARN_ON_ONCE(1);
7554 status = -EINVAL;
6b55970b 7555 goto out_impl_id;
2031cd1a 7556 }
ad0849a7
AA		 7557 if (xprt) {
7558 calldata->xprt = xprt;
7559 task_setup_data.rpc_xprt = xprt;
7560 task_setup_data.flags =
7561 RPC_TASK_SOFT|RPC_TASK_SOFTCONN|RPC_TASK_ASYNC;
7562 calldata->args.verifier = &clp->cl_confirm;
7563 } else {
7564 calldata->args.verifier = &verifier;
7565 }
8d89bd70
AA		 7566 calldata->args.client = clp;
7567#ifdef CONFIG_NFS_V4_1_MIGRATION
7568 calldata->args.flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
7569 EXCHGID4_FLAG_BIND_PRINC_STATEID |
7570 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
7571#else
7572 calldata->args.flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
7573 EXCHGID4_FLAG_BIND_PRINC_STATEID,
7574#endif
7575 msg.rpc_argp = &calldata->args;
7576 msg.rpc_resp = &calldata->res;
7577 task_setup_data.callback_data = calldata;
2031cd1a 7578
8d89bd70 7579 task = rpc_run_task(&task_setup_data);
63513232
OK		 7580 if (IS_ERR(task))
7581 return PTR_ERR(task);
7d2ed9ac 7582
ad0849a7
AA		 7583 if (!xprt) {
7584 status = rpc_wait_for_completion_task(task);
7585 if (!status)
7586 status = calldata->rpc_status;
7587 } else /* session trunking test */
8d89bd70 7588 status = calldata->rpc_status;
ad0849a7 7589
8d89bd70 7590 rpc_put_task(task);
abe9a6d5 7591out:
99fe60d0 7592 return status;
8d89bd70
AA		 7593
7594out_impl_id:
7595 kfree(calldata->res.impl_id);
7596out_server_scope:
7597 kfree(calldata->res.server_scope);
7598out_server_owner:
7599 kfree(calldata->res.server_owner);
7600out_calldata:
7601 kfree(calldata);
63513232 7602 nfs_put_client(clp);
8d89bd70 7603 goto out;
99fe60d0
BH		 7604}
7605
2031cd1a
WAA		 7606/*
7607 * nfs4_proc_exchange_id()
7608 *
7609 * Returns zero, a negative errno, or a negative NFS4ERR status code.
7610 *
7611 * Since the clientid has expired, all compounds using sessions
7612 * associated with the stale clientid will be returning
7613 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
7614 * be in some phase of session reset.
7615 *
7616 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
7617 */
7618int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
7619{
7620 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
7621 int status;
7622
7623 /* try SP4_MACH_CRED if krb5i/p */
7624 if (authflavor == RPC_AUTH_GSS_KRB5I ||
7625 authflavor == RPC_AUTH_GSS_KRB5P) {
ad0849a7 7626 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED, NULL);
2031cd1a
WAA		 7627 if (!status)
7628 return 0;
7629 }
7630
7631 /* try SP4_NONE */
ad0849a7 7632 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE, NULL);
2031cd1a
WAA		 7633}
7634
04fa2c6b
AA		 7635/**
7636 * nfs4_test_session_trunk
7637 *
7638 * This is an add_xprt_test() test function called from
7639 * rpc_clnt_setup_test_and_add_xprt.
7640 *
7641 * The rpc_xprt_switch is referrenced by rpc_clnt_setup_test_and_add_xprt
7642 * and is dereferrenced in nfs4_exchange_id_release
7643 *
7644 * Upon success, add the new transport to the rpc_clnt
7645 *
7646 * @clnt: struct rpc_clnt to get new transport
7647 * @xprt: the rpc_xprt to test
7648 * @data: call data for _nfs4_proc_exchange_id.
7649 */
7650int nfs4_test_session_trunk(struct rpc_clnt *clnt, struct rpc_xprt *xprt,
7651 void *data)
7652{
7653 struct nfs4_add_xprt_data *adata = (struct nfs4_add_xprt_data *)data;
7654 u32 sp4_how;
7655
7656 dprintk("--> %s try %s\n", __func__,
7657 xprt->address_strings[RPC_DISPLAY_ADDR]);
7658
7659 sp4_how = (adata->clp->cl_sp4_flags == 0 ? SP4_NONE : SP4_MACH_CRED);
7660
7661 /* Test connection for session trunking. Async exchange_id call */
7662 return _nfs4_proc_exchange_id(adata->clp, adata->cred, sp4_how, xprt);
2031cd1a 7663}
04fa2c6b 7664EXPORT_SYMBOL_GPL(nfs4_test_session_trunk);
2031cd1a 7665
66245539
TM		 7666static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
7667 struct rpc_cred *cred)
7668{
7669 struct rpc_message msg = {
7670 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
7671 .rpc_argp = clp,
7672 .rpc_cred = cred,
7673 };
7674 int status;
7675
7676 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7677 trace_nfs4_destroy_clientid(clp, status);
66245539 7678 if (status)
02c67525 7679 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 7680 "DESTROY_CLIENTID.", status, clp->cl_hostname);
7681 return status;
7682}
7683
7684static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
7685 struct rpc_cred *cred)
7686{
7687 unsigned int loop;
7688 int ret;
7689
7690 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
7691 ret = _nfs4_proc_destroy_clientid(clp, cred);
7692 switch (ret) {
7693 case -NFS4ERR_DELAY:
7694 case -NFS4ERR_CLIENTID_BUSY:
7695 ssleep(1);
7696 break;
7697 default:
7698 return ret;
7699 }
7700 }
7701 return 0;
7702}
7703
7704int nfs4_destroy_clientid(struct nfs_client *clp)
7705{
7706 struct rpc_cred *cred;
7707 int ret = 0;
7708
7709 if (clp->cl_mvops->minor_version < 1)
7710 goto out;
7711 if (clp->cl_exchange_flags == 0)
7712 goto out;
05f4c350
CL		 7713 if (clp->cl_preserve_clid)
7714 goto out;
73d8bde5 7715 cred = nfs4_get_clid_cred(clp);
66245539
TM		 7716 ret = nfs4_proc_destroy_clientid(clp, cred);
7717 if (cred)
7718 put_rpccred(cred);
7719 switch (ret) {
7720 case 0:
7721 case -NFS4ERR_STALE_CLIENTID:
7722 clp->cl_exchange_flags = 0;
7723 }
7724out:
7725 return ret;
7726}
7727
2050f0cc
AA		 7728struct nfs4_get_lease_time_data {
7729 struct nfs4_get_lease_time_args *args;
7730 struct nfs4_get_lease_time_res *res;
7731 struct nfs_client *clp;
7732};
7733
7734static void nfs4_get_lease_time_prepare(struct rpc_task *task,
7735 void *calldata)
7736{
2050f0cc
AA		 7737 struct nfs4_get_lease_time_data *data =
7738 (struct nfs4_get_lease_time_data *)calldata;
7739
7740 dprintk("--> %s\n", __func__);
7741 /* just setup sequence, do not trigger session recovery
7742 since we're invoked within one */
7981c8a6 7743 nfs4_setup_sequence(data->clp,
d9afbd1b
TM		 7744 &data->args->la_seq_args,
7745 &data->res->lr_seq_res,
7746 task);
2050f0cc
AA		 7747 dprintk("<-- %s\n", __func__);
7748}
7749
7750/*
7751 * Called from nfs4_state_manager thread for session setup, so don't recover
7752 * from sequence operation or clientid errors.
7753 */
7754static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
7755{
7756 struct nfs4_get_lease_time_data *data =
7757 (struct nfs4_get_lease_time_data *)calldata;
7758
7759 dprintk("--> %s\n", __func__);
14516c3a
TM		 7760 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
7761 return;
2050f0cc
AA		 7762 switch (task->tk_status) {
7763 case -NFS4ERR_DELAY:
7764 case -NFS4ERR_GRACE:
7765 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
7766 rpc_delay(task, NFS4_POLL_RETRY_MIN);
7767 task->tk_status = 0;
a8a4ae3a
AA		 7768 /* fall through */
7769 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 7770 rpc_restart_call_prepare(task);
2050f0cc
AA		 7771 return;
7772 }
2050f0cc
AA		 7773 dprintk("<-- %s\n", __func__);
7774}
7775
17280175 7776static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 7777 .rpc_call_prepare = nfs4_get_lease_time_prepare,
7778 .rpc_call_done = nfs4_get_lease_time_done,
7779};
7780
7781int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
7782{
7783 struct rpc_task *task;
7784 struct nfs4_get_lease_time_args args;
7785 struct nfs4_get_lease_time_res res = {
7786 .lr_fsinfo = fsinfo,
7787 };
7788 struct nfs4_get_lease_time_data data = {
7789 .args = &args,
7790 .res = &res,
7791 .clp = clp,
7792 };
7793 struct rpc_message msg = {
7794 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
7795 .rpc_argp = &args,
7796 .rpc_resp = &res,
7797 };
7798 struct rpc_task_setup task_setup = {
7799 .rpc_client = clp->cl_rpcclient,
7800 .rpc_message = &msg,
7801 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 7802 .callback_data = &data,
7803 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 7804 };
7805 int status;
7806
a9c92d6b 7807 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 7808 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 7809 task = rpc_run_task(&task_setup);
7810
7811 if (IS_ERR(task))
f6148713 7812 return PTR_ERR(task);
2050f0cc 7813
f6148713
AS		 7814 status = task->tk_status;
7815 rpc_put_task(task);
2050f0cc
AA		 7816 return status;
7817}
7818
fc931582
AA		 7819/*
7820 * Initialize the values to be used by the client in CREATE_SESSION
7821 * If nfs4_init_session set the fore channel request and response sizes,
7822 * use them.
7823 *
7824 * Set the back channel max_resp_sz_cached to zero to force the client to
7825 * always set csa_cachethis to FALSE because the current implementation
7826 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
7827 */
6b26cc8c
CL		 7828static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args,
7829 struct rpc_clnt *clnt)
fc931582 7830{
18aad3d5 7831 unsigned int max_rqst_sz, max_resp_sz;
6b26cc8c 7832 unsigned int max_bc_payload = rpc_max_bc_payload(clnt);
18aad3d5
AA		 7833
7834 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
7835 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 7836
fc931582 7837 /* Fore channel attributes */
18aad3d5
AA		 7838 args->fc_attrs.max_rqst_sz = max_rqst_sz;
7839 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 7840 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 7841 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 7842
7843 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 7844 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 7845 __func__,
7846 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 7847 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 7848
7849 /* Back channel attributes */
6b26cc8c
CL		 7850 args->bc_attrs.max_rqst_sz = max_bc_payload;
7851 args->bc_attrs.max_resp_sz = max_bc_payload;
fc931582
AA		 7852 args->bc_attrs.max_resp_sz_cached = 0;
7853 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5405fc44 7854 args->bc_attrs.max_reqs = min_t(unsigned short, max_session_cb_slots, 1);
fc931582
AA		 7855
7856 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
7857 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
7858 __func__,
7859 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
7860 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
7861 args->bc_attrs.max_reqs);
7862}
7863
79969dd1
TM		 7864static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args,
7865 struct nfs41_create_session_res *res)
8d35301d 7866{
43c2e885 7867 struct nfs4_channel_attrs *sent = &args->fc_attrs;
79969dd1 7868 struct nfs4_channel_attrs *rcvd = &res->fc_attrs;
43c2e885 7869
43c2e885
BF		 7870 if (rcvd->max_resp_sz > sent->max_resp_sz)
7871 return -EINVAL;
7872 /*
7873 * Our requested max_ops is the minimum we need; we're not
7874 * prepared to break up compounds into smaller pieces than that.
7875 * So, no point even trying to continue if the server won't
7876 * cooperate:
7877 */
7878 if (rcvd->max_ops < sent->max_ops)
7879 return -EINVAL;
7880 if (rcvd->max_reqs == 0)
7881 return -EINVAL;
b4b9a0c1
VG		 7882 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
7883 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 7884 return 0;
8d35301d
AA		 7885}
7886
79969dd1
TM		 7887static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args,
7888 struct nfs41_create_session_res *res)
43c2e885
BF		 7889{
7890 struct nfs4_channel_attrs *sent = &args->bc_attrs;
79969dd1 7891 struct nfs4_channel_attrs *rcvd = &res->bc_attrs;
8d35301d 7892
b1c0df5f
TM		 7893 if (!(res->flags & SESSION4_BACK_CHAN))
7894 goto out;
43c2e885
BF		 7895 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
7896 return -EINVAL;
7897 if (rcvd->max_resp_sz < sent->max_resp_sz)
7898 return -EINVAL;
7899 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7900 return -EINVAL;
5405fc44 7901 if (rcvd->max_ops > sent->max_ops)
43c2e885 7902 return -EINVAL;
5405fc44 7903 if (rcvd->max_reqs > sent->max_reqs)
43c2e885 7904 return -EINVAL;
b1c0df5f 7905out:
43c2e885
BF		 7906 return 0;
7907}
8d35301d 7908
8d35301d 7909static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
79969dd1 7910 struct nfs41_create_session_res *res)
8d35301d 7911{
43c2e885 7912 int ret;
8d35301d 7913
79969dd1 7914 ret = nfs4_verify_fore_channel_attrs(args, res);
43c2e885
BF		 7915 if (ret)
7916 return ret;
79969dd1
TM		 7917 return nfs4_verify_back_channel_attrs(args, res);
7918}
7919
7920static void nfs4_update_session(struct nfs4_session *session,
7921 struct nfs41_create_session_res *res)
7922{
7923 nfs4_copy_sessionid(&session->sess_id, &res->sessionid);
e11259f9
TM		 7924 /* Mark client id and session as being confirmed */
7925 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;
7926 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state);
79969dd1
TM		 7927 session->flags = res->flags;
7928 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs));
b1c0df5f
TM		 7929 if (res->flags & SESSION4_BACK_CHAN)
7930 memcpy(&session->bc_attrs, &res->bc_attrs,
7931 sizeof(session->bc_attrs));
8d35301d
AA		 7932}
7933
848f5bda
TM		 7934static int _nfs4_proc_create_session(struct nfs_client *clp,
7935 struct rpc_cred *cred)
fc931582
AA		 7936{
7937 struct nfs4_session *session = clp->cl_session;
7938 struct nfs41_create_session_args args = {
7939 .client = clp,
79969dd1
TM		 7940 .clientid = clp->cl_clientid,
7941 .seqid = clp->cl_seqid,
fc931582
AA		 7942 .cb_program = NFS4_CALLBACK,
7943 };
79969dd1
TM		 7944 struct nfs41_create_session_res res;
7945
fc931582
AA		 7946 struct rpc_message msg = {
7947 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
7948 .rpc_argp = &args,
7949 .rpc_resp = &res,
848f5bda 7950 .rpc_cred = cred,
fc931582
AA		 7951 };
7952 int status;
7953
6b26cc8c 7954 nfs4_init_channel_attrs(&args, clp->cl_rpcclient);
0f91421e 7955 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 7956
1bd714f2 7957 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7958 trace_nfs4_create_session(clp, status);
fc931582 7959
b519d408
TM		 7960 switch (status) {
7961 case -NFS4ERR_STALE_CLIENTID:
7962 case -NFS4ERR_DELAY:
7963 case -ETIMEDOUT:
7964 case -EACCES:
7965 case -EAGAIN:
7966 goto out;
7967 };
7968
7969 clp->cl_seqid++;
43095d39 7970 if (!status) {
8d35301d 7971 /* Verify the session's negotiated channel_attrs values */
79969dd1 7972 status = nfs4_verify_channel_attrs(&args, &res);
fc931582 7973 /* Increment the clientid slot sequence id */
79969dd1
TM		 7974 if (status)
7975 goto out;
7976 nfs4_update_session(session, &res);
fc931582 7977 }
79969dd1 7978out:
fc931582
AA		 7979 return status;
7980}
7981
7982/*
7983 * Issues a CREATE_SESSION operation to the server.
7984 * It is the responsibility of the caller to verify the session is
7985 * expired before calling this routine.
7986 */
848f5bda 7987int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 7988{
7989 int status;
7990 unsigned *ptr;
fc931582
AA		 7991 struct nfs4_session *session = clp->cl_session;
7992
7993 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
7994
848f5bda 7995 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 7996 if (status)
7997 goto out;
7998
aacd5537
AA		 7999 /* Init or reset the session slot tables */
8000 status = nfs4_setup_session_slot_tables(session);
8001 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 8002 if (status)
8003 goto out;
8004
8005 ptr = (unsigned *)&session->sess_id.data[0];
8006 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
8007 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 8008out:
8009 dprintk("<-- %s\n", __func__);
8010 return status;
8011}
8012
0f3e66c6
AA		 8013/*
8014 * Issue the over-the-wire RPC DESTROY_SESSION.
8015 * The caller must serialize access to this routine.
8016 */
848f5bda
TM		 8017int nfs4_proc_destroy_session(struct nfs4_session *session,
8018 struct rpc_cred *cred)
0f3e66c6 8019{
848f5bda
TM		 8020 struct rpc_message msg = {
8021 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
8022 .rpc_argp = session,
8023 .rpc_cred = cred,
8024 };
0f3e66c6 8025 int status = 0;
0f3e66c6
AA		 8026
8027 dprintk("--> nfs4_proc_destroy_session\n");
8028
8029 /* session is still being setup */
e11259f9
TM		 8030 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state))
8031 return 0;
0f3e66c6 8032
1bd714f2 8033 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 8034 trace_nfs4_destroy_session(session->clp, status);
0f3e66c6
AA		 8035
8036 if (status)
08106ac7 8037 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 8038 "Session has been destroyed regardless...\n", status);
8039
8040 dprintk("<-- nfs4_proc_destroy_session\n");
8041 return status;
8042}
8043
fc01cea9
AA		 8044/*
8045 * Renew the cl_session lease.
8046 */
d5f8d3fe
TM		 8047struct nfs4_sequence_data {
8048 struct nfs_client *clp;
8049 struct nfs4_sequence_args args;
8050 struct nfs4_sequence_res res;
8051};
8052
dc96aef9
AB		 8053static void nfs41_sequence_release(void *data)
8054{
d5f8d3fe
TM		 8055 struct nfs4_sequence_data *calldata = data;
8056 struct nfs_client *clp = calldata->clp;
dc96aef9 8057
7135840f
AB		 8058 if (atomic_read(&clp->cl_count) > 1)
8059 nfs4_schedule_state_renewal(clp);
8060 nfs_put_client(clp);
d5f8d3fe 8061 kfree(calldata);
dc96aef9
AB		 8062}
8063
aa5190d0
TM		 8064static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
8065{
8066 switch(task->tk_status) {
8067 case -NFS4ERR_DELAY:
aa5190d0
TM		 8068 rpc_delay(task, NFS4_POLL_RETRY_MAX);
8069 return -EAGAIN;
8070 default:
0400a6b0 8071 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 8072 }
8073 return 0;
8074}
8075
dc96aef9 8076static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 8077{
d5f8d3fe
TM		 8078 struct nfs4_sequence_data *calldata = data;
8079 struct nfs_client *clp = calldata->clp;
fc01cea9 8080
14516c3a
TM		 8081 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
8082 return;
fc01cea9 8083
c6d01c6f 8084 trace_nfs4_sequence(clp, task->tk_status);
fc01cea9
AA		 8085 if (task->tk_status < 0) {
8086 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 8087 if (atomic_read(&clp->cl_count) == 1)
8088 goto out;
fc01cea9 8089
aa5190d0
TM		 8090 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
8091 rpc_restart_call_prepare(task);
fc01cea9
AA		 8092 return;
8093 }
8094 }
fc01cea9 8095 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 8096out:
fc01cea9
AA		 8097 dprintk("<-- %s\n", __func__);
8098}
8099
8100static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
8101{
d5f8d3fe
TM		 8102 struct nfs4_sequence_data *calldata = data;
8103 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 8104 struct nfs4_sequence_args *args;
8105 struct nfs4_sequence_res *res;
8106
fc01cea9
AA		 8107 args = task->tk_msg.rpc_argp;
8108 res = task->tk_msg.rpc_resp;
8109
7981c8a6 8110 nfs4_setup_sequence(clp, args, res, task);
fc01cea9
AA		 8111}
8112
8113static const struct rpc_call_ops nfs41_sequence_ops = {
8114 .rpc_call_done = nfs41_sequence_call_done,
8115 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 8116 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 8117};
8118
8fe72bac
TM		 8119static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
8120 struct rpc_cred *cred,
8121 bool is_privileged)
fc01cea9 8122{
d5f8d3fe 8123 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 8124 struct rpc_message msg = {
8125 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
8126 .rpc_cred = cred,
8127 };
71ac6da9
TM		 8128 struct rpc_task_setup task_setup_data = {
8129 .rpc_client = clp->cl_rpcclient,
8130 .rpc_message = &msg,
8fe72bac 8131 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 8132 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 8133 };
fc01cea9 8134
7135840f 8135 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 8136 return ERR_PTR(-EIO);
dfb4f309 8137 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 8138 if (calldata == NULL) {
7135840f 8139 nfs_put_client(clp);
71ac6da9 8140 return ERR_PTR(-ENOMEM);
fc01cea9 8141 }
a9c92d6b 8142 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 8143 if (is_privileged)
8144 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 8145 msg.rpc_argp = &calldata->args;
8146 msg.rpc_resp = &calldata->res;
8147 calldata->clp = clp;
71ac6da9 8148 task_setup_data.callback_data = calldata;
fc01cea9 8149
71ac6da9
TM		 8150 return rpc_run_task(&task_setup_data);
8151}
8152
2f60ea6b 8153static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 8154{
8155 struct rpc_task *task;
8156 int ret = 0;
8157
2f60ea6b 8158 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
d1f456b0 8159 return -EAGAIN;
8fe72bac 8160 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 8161 if (IS_ERR(task))
8162 ret = PTR_ERR(task);
8163 else
bf294b41 8164 rpc_put_task_async(task);
71ac6da9
TM		 8165 dprintk("<-- %s status=%d\n", __func__, ret);
8166 return ret;
8167}
8168
8169static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
8170{
8171 struct rpc_task *task;
8172 int ret;
8173
8fe72bac 8174 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 8175 if (IS_ERR(task)) {
8176 ret = PTR_ERR(task);
8177 goto out;
8178 }
8179 ret = rpc_wait_for_completion_task(task);
be824167 8180 if (!ret)
71ac6da9
TM		 8181 ret = task->tk_status;
8182 rpc_put_task(task);
8183out:
8184 dprintk("<-- %s status=%d\n", __func__, ret);
8185 return ret;
fc01cea9
AA		 8186}
8187
fce5c838
RL		 8188struct nfs4_reclaim_complete_data {
8189 struct nfs_client *clp;
8190 struct nfs41_reclaim_complete_args arg;
8191 struct nfs41_reclaim_complete_res res;
8192};
8193
8194static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
8195{
8196 struct nfs4_reclaim_complete_data *calldata = data;
8197
7981c8a6 8198 nfs4_setup_sequence(calldata->clp,
d9afbd1b
TM		 8199 &calldata->arg.seq_args,
8200 &calldata->res.seq_res,
8201 task);
fce5c838
RL		 8202}
8203
aa5190d0
TM		 8204static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
8205{
8206 switch(task->tk_status) {
8207 case 0:
8208 case -NFS4ERR_COMPLETE_ALREADY:
8209 case -NFS4ERR_WRONG_CRED: /* What to do here? */
8210 break;
8211 case -NFS4ERR_DELAY:
aa5190d0 8212 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 8213 /* fall through */
8214 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0 8215 return -EAGAIN;
0048fdd0
TM		 8216 case -NFS4ERR_BADSESSION:
8217 case -NFS4ERR_DEADSESSION:
8218 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
8219 nfs4_schedule_session_recovery(clp->cl_session,
8220 task->tk_status);
8221 break;
aa5190d0 8222 default:
0400a6b0 8223 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 8224 }
8225 return 0;
8226}
8227
fce5c838
RL		 8228static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
8229{
8230 struct nfs4_reclaim_complete_data *calldata = data;
8231 struct nfs_client *clp = calldata->clp;
8232 struct nfs4_sequence_res *res = &calldata->res.seq_res;
8233
8234 dprintk("--> %s\n", __func__);
14516c3a
TM		 8235 if (!nfs41_sequence_done(task, res))
8236 return;
fce5c838 8237
c6d01c6f 8238 trace_nfs4_reclaim_complete(clp, task->tk_status);
aa5190d0
TM		 8239 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
8240 rpc_restart_call_prepare(task);
8241 return;
8242 }
fce5c838
RL		 8243 dprintk("<-- %s\n", __func__);
8244}
8245
8246static void nfs4_free_reclaim_complete_data(void *data)
8247{
8248 struct nfs4_reclaim_complete_data *calldata = data;
8249
8250 kfree(calldata);
8251}
8252
8253static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
8254 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
8255 .rpc_call_done = nfs4_reclaim_complete_done,
8256 .rpc_release = nfs4_free_reclaim_complete_data,
8257};
8258
8259/*
8260 * Issue a global reclaim complete.
8261 */
965e9c23
TM		 8262static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
8263 struct rpc_cred *cred)
fce5c838
RL		 8264{
8265 struct nfs4_reclaim_complete_data *calldata;
8266 struct rpc_task *task;
8267 struct rpc_message msg = {
8268 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 8269 .rpc_cred = cred,
fce5c838
RL		 8270 };
8271 struct rpc_task_setup task_setup_data = {
8272 .rpc_client = clp->cl_rpcclient,
8273 .rpc_message = &msg,
8274 .callback_ops = &nfs4_reclaim_complete_call_ops,
8275 .flags = RPC_TASK_ASYNC,
8276 };
8277 int status = -ENOMEM;
8278
8279 dprintk("--> %s\n", __func__);
8535b2be 8280 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 8281 if (calldata == NULL)
8282 goto out;
8283 calldata->clp = clp;
8284 calldata->arg.one_fs = 0;
fce5c838 8285
a9c92d6b 8286 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 8287 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 8288 msg.rpc_argp = &calldata->arg;
8289 msg.rpc_resp = &calldata->res;
8290 task_setup_data.callback_data = calldata;
8291 task = rpc_run_task(&task_setup_data);
acf82b85 8292 if (IS_ERR(task)) {
fce5c838 8293 status = PTR_ERR(task);
acf82b85
DC		 8294 goto out;
8295 }
820bf85c 8296 status = rpc_wait_for_completion_task(task);
c34c32ea
AA		 8297 if (status == 0)
8298 status = task->tk_status;
fce5c838
RL		 8299 rpc_put_task(task);
8300out:
8301 dprintk("<-- %s status=%d\n", __func__, status);
8302 return status;
8303}
b1f69b75
AA		 8304
8305static void
8306nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
8307{
8308 struct nfs4_layoutget *lgp = calldata;
c31663d4 8309 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
b1f69b75
AA		 8310
8311 dprintk("--> %s\n", __func__);
7981c8a6 8312 nfs4_setup_sequence(server->nfs_client, &lgp->args.seq_args,
183d9e7b
JL		 8313 &lgp->res.seq_res, task);
8314 dprintk("<-- %s\n", __func__);
b1f69b75
AA		 8315}
8316
8317static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
8318{
8319 struct nfs4_layoutget *lgp = calldata;
183d9e7b
JL		 8320
8321 dprintk("--> %s\n", __func__);
2e80dbe7 8322 nfs41_sequence_process(task, &lgp->res.seq_res);
183d9e7b
JL		 8323 dprintk("<-- %s\n", __func__);
8324}
8325
8326static int
8327nfs4_layoutget_handle_exception(struct rpc_task *task,
8328 struct nfs4_layoutget *lgp, struct nfs4_exception *exception)
8329{
ee314c2a
TM		 8330 struct inode *inode = lgp->args.inode;
8331 struct nfs_server *server = NFS_SERVER(inode);
8332 struct pnfs_layout_hdr *lo;
e85d7ee4
TM		 8333 int nfs4err = task->tk_status;
8334 int err, status = 0;
f7db0b28 8335 LIST_HEAD(head);
b1f69b75 8336
ed7e5423 8337 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
b1f69b75 8338
e85d7ee4 8339 switch (nfs4err) {
b1f69b75 8340 case 0:
ee314c2a 8341 goto out;
7c1e6e58
PT		 8342
8343 /*
8344 * NFS4ERR_LAYOUTUNAVAILABLE means we are not supposed to use pnfs
8345 * on the file. set tk_status to -ENODATA to tell upper layer to
8346 * retry go inband.
8347 */
8348 case -NFS4ERR_LAYOUTUNAVAILABLE:
183d9e7b 8349 status = -ENODATA;
7c1e6e58 8350 goto out;
21b874c8
TM		 8351 /*
8352 * NFS4ERR_BADLAYOUT means the MDS cannot return a layout of
8353 * length lgp->args.minlength != 0 (see RFC5661 section 18.43.3).
8354 */
8355 case -NFS4ERR_BADLAYOUT:
183d9e7b
JL		 8356 status = -EOVERFLOW;
8357 goto out;
ed7e5423
BH		 8358 /*
8359 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
21b874c8
TM		 8360 * (or clients) writing to the same RAID stripe except when
8361 * the minlength argument is 0 (see RFC5661 section 18.43.3).
183d9e7b
JL		 8362 *
8363 * Treat it like we would RECALLCONFLICT -- we retry for a little
8364 * while, and then eventually give up.
ed7e5423 8365 */
b1f69b75 8366 case -NFS4ERR_LAYOUTTRYLATER:
183d9e7b
JL		 8367 if (lgp->args.minlength == 0) {
8368 status = -EOVERFLOW;
8369 goto out;
ed7e5423 8370 }
e85d7ee4
TM		 8371 status = -EBUSY;
8372 break;
183d9e7b 8373 case -NFS4ERR_RECALLCONFLICT:
183d9e7b 8374 status = -ERECALLCONFLICT;
e85d7ee4 8375 break;
26f47443
TM		 8376 case -NFS4ERR_DELEG_REVOKED:
8377 case -NFS4ERR_ADMIN_REVOKED:
ee314c2a
TM		 8378 case -NFS4ERR_EXPIRED:
8379 case -NFS4ERR_BAD_STATEID:
183d9e7b 8380 exception->timeout = 0;
ee314c2a 8381 spin_lock(&inode->i_lock);
f7db0b28
TM		 8382 lo = NFS_I(inode)->layout;
8383 /* If the open stateid was bad, then recover it. */
8384 if (!lo || test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) ||
8385 nfs4_stateid_match_other(&lgp->args.stateid,
2259f960 8386 &lgp->args.ctx->state->stateid)) {
ee314c2a 8387 spin_unlock(&inode->i_lock);
183d9e7b 8388 exception->state = lgp->args.ctx->state;
26f47443 8389 exception->stateid = &lgp->args.stateid;
2259f960
TM		 8390 break;
8391 }
f7db0b28
TM		 8392
8393 /*
8394 * Mark the bad layout state as invalid, then retry
8395 */
668f455d 8396 pnfs_mark_layout_stateid_invalid(lo, &head);
f7db0b28 8397 spin_unlock(&inode->i_lock);
1f18b82c 8398 nfs_commit_inode(inode, 0);
f7db0b28
TM		 8399 pnfs_free_lseg_list(&head);
8400 status = -EAGAIN;
8401 goto out;
b1f69b75 8402 }
183d9e7b 8403
8ac09251 8404 nfs4_sequence_free_slot(&lgp->res.seq_res);
e85d7ee4
TM		 8405 err = nfs4_handle_exception(server, nfs4err, exception);
8406 if (!status) {
8407 if (exception->retry)
8408 status = -EAGAIN;
8409 else
8410 status = err;
8411 }
ee314c2a 8412out:
b1f69b75 8413 dprintk("<-- %s\n", __func__);
183d9e7b 8414 return status;
b1f69b75
AA		 8415}
8416
8554116e
IK		 8417static size_t max_response_pages(struct nfs_server *server)
8418{
8419 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
8420 return nfs_page_array_len(0, max_resp_sz);
8421}
8422
8423static void nfs4_free_pages(struct page **pages, size_t size)
8424{
8425 int i;
8426
8427 if (!pages)
8428 return;
8429
8430 for (i = 0; i < size; i++) {
8431 if (!pages[i])
8432 break;
8433 __free_page(pages[i]);
8434 }
8435 kfree(pages);
8436}
8437
8438static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
8439{
8440 struct page **pages;
8441 int i;
8442
8443 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
8444 if (!pages) {
8445 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
8446 return NULL;
8447 }
8448
8449 for (i = 0; i < size; i++) {
8450 pages[i] = alloc_page(gfp_flags);
8451 if (!pages[i]) {
8452 dprintk("%s: failed to allocate page\n", __func__);
8453 nfs4_free_pages(pages, size);
8454 return NULL;
8455 }
8456 }
8457
8458 return pages;
8459}
8460
b1f69b75
AA		 8461static void nfs4_layoutget_release(void *calldata)
8462{
8463 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 8464 struct inode *inode = lgp->args.inode;
8465 struct nfs_server *server = NFS_SERVER(inode);
8554116e 8466 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 8467
8468 dprintk("--> %s\n", __func__);
8554116e 8469 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 8470 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 8471 put_nfs_open_context(lgp->args.ctx);
8472 kfree(calldata);
8473 dprintk("<-- %s\n", __func__);
8474}
8475
8476static const struct rpc_call_ops nfs4_layoutget_call_ops = {
8477 .rpc_call_prepare = nfs4_layoutget_prepare,
8478 .rpc_call_done = nfs4_layoutget_done,
8479 .rpc_release = nfs4_layoutget_release,
8480};
8481
a0b0a6e3 8482struct pnfs_layout_segment *
183d9e7b 8483nfs4_proc_layoutget(struct nfs4_layoutget *lgp, long *timeout, gfp_t gfp_flags)
b1f69b75 8484{
a47970ff
WAA		 8485 struct inode *inode = lgp->args.inode;
8486 struct nfs_server *server = NFS_SERVER(inode);
8554116e 8487 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 8488 struct rpc_task *task;
8489 struct rpc_message msg = {
8490 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
8491 .rpc_argp = &lgp->args,
8492 .rpc_resp = &lgp->res,
6ab59344 8493 .rpc_cred = lgp->cred,
b1f69b75
AA		 8494 };
8495 struct rpc_task_setup task_setup_data = {
8496 .rpc_client = server->client,
8497 .rpc_message = &msg,
8498 .callback_ops = &nfs4_layoutget_call_ops,
8499 .callback_data = lgp,
8500 .flags = RPC_TASK_ASYNC,
8501 };
a0b0a6e3 8502 struct pnfs_layout_segment *lseg = NULL;
bc23676c
TM		 8503 struct nfs4_exception exception = {
8504 .inode = inode,
8505 .timeout = *timeout,
8506 };
b1f69b75
AA		 8507 int status = 0;
8508
8509 dprintk("--> %s\n", __func__);
8510
4bd5a980
PT		 8511 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
8512 pnfs_get_layout_hdr(NFS_I(inode)->layout);
8513
8554116e
IK		 8514 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
8515 if (!lgp->args.layout.pages) {
8516 nfs4_layoutget_release(lgp);
a0b0a6e3 8517 return ERR_PTR(-ENOMEM);
8554116e
IK		 8518 }
8519 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
8520
35124a09 8521 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 8522 lgp->res.seq_res.sr_slot = NULL;
a9c92d6b 8523 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff 8524
b1f69b75
AA		 8525 task = rpc_run_task(&task_setup_data);
8526 if (IS_ERR(task))
a0b0a6e3 8527 return ERR_CAST(task);
820bf85c 8528 status = rpc_wait_for_completion_task(task);
183d9e7b
JL		 8529 if (status == 0) {
8530 status = nfs4_layoutget_handle_exception(task, lgp, &exception);
8531 *timeout = exception.timeout;
8532 }
8533
1037e6ea
TM		 8534 trace_nfs4_layoutget(lgp->args.ctx,
8535 &lgp->args.range,
8536 &lgp->res.range,
48c9579a 8537 &lgp->res.stateid,
1037e6ea 8538 status);
183d9e7b 8539
085b7a45
WAA		 8540 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
8541 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 8542 lseg = pnfs_layout_process(lgp);
2e80dbe7 8543 nfs4_sequence_free_slot(&lgp->res.seq_res);
b1f69b75
AA		 8544 rpc_put_task(task);
8545 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 8546 if (status)
8547 return ERR_PTR(status);
8548 return lseg;
b1f69b75
AA		 8549}
8550
cbe82603
BH		 8551static void
8552nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
8553{
8554 struct nfs4_layoutreturn *lrp = calldata;
8555
8556 dprintk("--> %s\n", __func__);
7981c8a6 8557 nfs4_setup_sequence(lrp->clp,
d9afbd1b
TM		 8558 &lrp->args.seq_args,
8559 &lrp->res.seq_res,
8560 task);
cbe82603
BH		 8561}
8562
8563static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
8564{
8565 struct nfs4_layoutreturn *lrp = calldata;
8566 struct nfs_server *server;
8567
8568 dprintk("--> %s\n", __func__);
8569
2e80dbe7 8570 if (!nfs41_sequence_process(task, &lrp->res.seq_res))
cbe82603
BH		 8571 return;
8572
8573 server = NFS_SERVER(lrp->args.inode);
f22e5edd
TM		 8574 switch (task->tk_status) {
8575 default:
8576 task->tk_status = 0;
8577 case 0:
8578 break;
8579 case -NFS4ERR_DELAY:
8478eaa1 8580 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
f22e5edd 8581 break;
2e80dbe7 8582 nfs4_sequence_free_slot(&lrp->res.seq_res);
d00c5d43 8583 rpc_restart_call_prepare(task);
cbe82603
BH		 8584 return;
8585 }
cbe82603
BH		 8586 dprintk("<-- %s\n", __func__);
8587}
8588
8589static void nfs4_layoutreturn_release(void *calldata)
8590{
8591 struct nfs4_layoutreturn *lrp = calldata;
849b286f 8592 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 8593
8594 dprintk("--> %s\n", __func__);
2a974425 8595 pnfs_layoutreturn_free_lsegs(lo, &lrp->args.stateid, &lrp->args.range,
68f74479 8596 lrp->res.lrs_present ? &lrp->res.stateid : NULL);
2e80dbe7 8597 nfs4_sequence_free_slot(&lrp->res.seq_res);
4d796d75
TM		 8598 if (lrp->ld_private.ops && lrp->ld_private.ops->free)
8599 lrp->ld_private.ops->free(&lrp->ld_private);
2f065ddb
TM		 8600 pnfs_put_layout_hdr(lrp->args.layout);
8601 nfs_iput_and_deactive(lrp->inode);
cbe82603
BH		 8602 kfree(calldata);
8603 dprintk("<-- %s\n", __func__);
8604}
8605
8606static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
8607 .rpc_call_prepare = nfs4_layoutreturn_prepare,
8608 .rpc_call_done = nfs4_layoutreturn_done,
8609 .rpc_release = nfs4_layoutreturn_release,
8610};
8611
6c16605d 8612int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync)
cbe82603
BH		 8613{
8614 struct rpc_task *task;
8615 struct rpc_message msg = {
8616 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
8617 .rpc_argp = &lrp->args,
8618 .rpc_resp = &lrp->res,
9556000d 8619 .rpc_cred = lrp->cred,
cbe82603
BH		 8620 };
8621 struct rpc_task_setup task_setup_data = {
1771c577 8622 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
cbe82603
BH		 8623 .rpc_message = &msg,
8624 .callback_ops = &nfs4_layoutreturn_call_ops,
8625 .callback_data = lrp,
8626 };
6c16605d 8627 int status = 0;
cbe82603 8628
99ade3c7
AE		 8629 nfs4_state_protect(NFS_SERVER(lrp->args.inode)->nfs_client,
8630 NFS_SP4_MACH_CRED_PNFS_CLEANUP,
8631 &task_setup_data.rpc_client, &msg);
8632
cbe82603 8633 dprintk("--> %s\n", __func__);
5a0ec8ac
TM		 8634 if (!sync) {
8635 lrp->inode = nfs_igrab_and_active(lrp->args.inode);
8636 if (!lrp->inode) {
8637 nfs4_layoutreturn_release(lrp);
8638 return -EAGAIN;
8639 }
8640 task_setup_data.flags |= RPC_TASK_ASYNC;
8641 }
a9c92d6b 8642 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 8643 task = rpc_run_task(&task_setup_data);
8644 if (IS_ERR(task))
8645 return PTR_ERR(task);
5a0ec8ac
TM		 8646 if (sync)
8647 status = task->tk_status;
48c9579a 8648 trace_nfs4_layoutreturn(lrp->args.inode, &lrp->args.stateid, status);
cbe82603
BH		 8649 dprintk("<-- %s status=%d\n", __func__, status);
8650 rpc_put_task(task);
8651 return status;
8652}
8653
b1f69b75 8654static int
cd5875fe
TM		 8655_nfs4_proc_getdeviceinfo(struct nfs_server *server,
8656 struct pnfs_device *pdev,
8657 struct rpc_cred *cred)
b1f69b75
AA		 8658{
8659 struct nfs4_getdeviceinfo_args args = {
8660 .pdev = pdev,
4e590803
TM		 8661 .notify_types = NOTIFY_DEVICEID4_CHANGE |
8662 NOTIFY_DEVICEID4_DELETE,
b1f69b75
AA		 8663 };
8664 struct nfs4_getdeviceinfo_res res = {
8665 .pdev = pdev,
8666 };
8667 struct rpc_message msg = {
8668 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
8669 .rpc_argp = &args,
8670 .rpc_resp = &res,
cd5875fe 8671 .rpc_cred = cred,
b1f69b75
AA		 8672 };
8673 int status;
8674
8675 dprintk("--> %s\n", __func__);
7c513058 8676 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4e590803
TM		 8677 if (res.notification & ~args.notify_types)
8678 dprintk("%s: unsupported notification\n", __func__);
df52699e
TM		 8679 if (res.notification != args.notify_types)
8680 pdev->nocache = 1;
4e590803 8681
b1f69b75
AA		 8682 dprintk("<-- %s status=%d\n", __func__, status);
8683
8684 return status;
8685}
8686
cd5875fe
TM		 8687int nfs4_proc_getdeviceinfo(struct nfs_server *server,
8688 struct pnfs_device *pdev,
8689 struct rpc_cred *cred)
b1f69b75
AA		 8690{
8691 struct nfs4_exception exception = { };
8692 int err;
8693
8694 do {
8695 err = nfs4_handle_exception(server,
cd5875fe 8696 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 8697 &exception);
8698 } while (exception.retry);
8699 return err;
8700}
8701EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
8702
863a3c6c
AA		 8703static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
8704{
8705 struct nfs4_layoutcommit_data *data = calldata;
8706 struct nfs_server *server = NFS_SERVER(data->args.inode);
8707
7981c8a6 8708 nfs4_setup_sequence(server->nfs_client,
d9afbd1b
TM		 8709 &data->args.seq_args,
8710 &data->res.seq_res,
8711 task);
863a3c6c
AA		 8712}
8713
8714static void
8715nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
8716{
8717 struct nfs4_layoutcommit_data *data = calldata;
8718 struct nfs_server *server = NFS_SERVER(data->args.inode);
8719
6ba7db34 8720 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 8721 return;
8722
8723 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 8724 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
8725 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
8726 case -NFS4ERR_BADLAYOUT: /* no layout */
8727 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 8728 task->tk_status = 0;
e59d27e0 8729 case 0:
e59d27e0
TM		 8730 break;
8731 default:
8478eaa1 8732 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) {
e59d27e0
TM		 8733 rpc_restart_call_prepare(task);
8734 return;
8735 }
8736 }
863a3c6c
AA		 8737}
8738
8739static void nfs4_layoutcommit_release(void *calldata)
8740{
8741 struct nfs4_layoutcommit_data *data = calldata;
8742
db29c089 8743 pnfs_cleanup_layoutcommit(data);
d8c951c3
TM		 8744 nfs_post_op_update_inode_force_wcc(data->args.inode,
8745 data->res.fattr);
863a3c6c 8746 put_rpccred(data->cred);
472e2594 8747 nfs_iput_and_deactive(data->inode);
863a3c6c
AA		 8748 kfree(data);
8749}
8750
8751static const struct rpc_call_ops nfs4_layoutcommit_ops = {
8752 .rpc_call_prepare = nfs4_layoutcommit_prepare,
8753 .rpc_call_done = nfs4_layoutcommit_done,
8754 .rpc_release = nfs4_layoutcommit_release,
8755};
8756
8757int
ef311537 8758nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 8759{
8760 struct rpc_message msg = {
8761 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
8762 .rpc_argp = &data->args,
8763 .rpc_resp = &data->res,
8764 .rpc_cred = data->cred,
8765 };
8766 struct rpc_task_setup task_setup_data = {
8767 .task = &data->task,
8768 .rpc_client = NFS_CLIENT(data->args.inode),
8769 .rpc_message = &msg,
8770 .callback_ops = &nfs4_layoutcommit_ops,
8771 .callback_data = data,
863a3c6c
AA		 8772 };
8773 struct rpc_task *task;
8774 int status = 0;
8775
b4839ebe
KM		 8776 dprintk("NFS: initiating layoutcommit call. sync %d "
8777 "lbw: %llu inode %lu\n", sync,
863a3c6c
AA		 8778 data->args.lastbytewritten,
8779 data->args.inode->i_ino);
8780
472e2594
TM		 8781 if (!sync) {
8782 data->inode = nfs_igrab_and_active(data->args.inode);
8783 if (data->inode == NULL) {
8784 nfs4_layoutcommit_release(data);
8785 return -EAGAIN;
8786 }
8787 task_setup_data.flags = RPC_TASK_ASYNC;
8788 }
a9c92d6b 8789 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 8790 task = rpc_run_task(&task_setup_data);
8791 if (IS_ERR(task))
8792 return PTR_ERR(task);
472e2594
TM		 8793 if (sync)
8794 status = task->tk_status;
48c9579a 8795 trace_nfs4_layoutcommit(data->args.inode, &data->args.stateid, status);
863a3c6c
AA		 8796 dprintk("%s: status %d\n", __func__, status);
8797 rpc_put_task(task);
8798 return status;
8799}
fca78d6d 8800
97431204
AA		 8801/**
8802 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
8803 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
8804 */
fca78d6d
BS		 8805static int
8806_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
b1b3e136
WAA		 8807 struct nfs_fsinfo *info,
8808 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
fca78d6d
BS		 8809{
8810 struct nfs41_secinfo_no_name_args args = {
8811 .style = SECINFO_STYLE_CURRENT_FH,
8812 };
8813 struct nfs4_secinfo_res res = {
8814 .flavors = flavors,
8815 };
8816 struct rpc_message msg = {
8817 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
8818 .rpc_argp = &args,
8819 .rpc_resp = &res,
8820 };
b1b3e136 8821 struct rpc_clnt *clnt = server->client;
7cb852df 8822 struct rpc_cred *cred = NULL;
b1b3e136
WAA		 8823 int status;
8824
8825 if (use_integrity) {
8826 clnt = server->nfs_client->cl_rpcclient;
7cb852df
WAA		 8827 cred = nfs4_get_clid_cred(server->nfs_client);
8828 msg.rpc_cred = cred;
b1b3e136
WAA		 8829 }
8830
8831 dprintk("--> %s\n", __func__);
8832 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
8833 &res.seq_res, 0);
8834 dprintk("<-- %s status=%d\n", __func__, status);
8835
7cb852df
WAA		 8836 if (cred)
8837 put_rpccred(cred);
b1b3e136
WAA		 8838
8839 return status;
fca78d6d
BS		 8840}
8841
8842static int
8843nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8844 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
8845{
8846 struct nfs4_exception exception = { };
8847 int err;
8848 do {
b1b3e136
WAA		 8849 /* first try using integrity protection */
8850 err = -NFS4ERR_WRONGSEC;
8851
8852 /* try to use integrity protection with machine cred */
8853 if (_nfs4_is_integrity_protected(server->nfs_client))
8854 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8855 flavors, true);
8856
8857 /*
8858 * if unable to use integrity protection, or SECINFO with
8859 * integrity protection returns NFS4ERR_WRONGSEC (which is
8860 * disallowed by spec, but exists in deployed servers) use
8861 * the current filesystem's rpc_client and the user cred.
8862 */
8863 if (err == -NFS4ERR_WRONGSEC)
8864 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8865 flavors, false);
8866
fca78d6d
BS		 8867 switch (err) {
8868 case 0:
8869 case -NFS4ERR_WRONGSEC:
78b19bae 8870 case -ENOTSUPP:
05e9cfb4 8871 goto out;
fca78d6d
BS		 8872 default:
8873 err = nfs4_handle_exception(server, err, &exception);
8874 }
8875 } while (exception.retry);
05e9cfb4 8876out:
fca78d6d
BS		 8877 return err;
8878}
8879
8880static int
8881nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
8882 struct nfs_fsinfo *info)
8883{
8884 int err;
8885 struct page *page;
367156d9 8886 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
fca78d6d 8887 struct nfs4_secinfo_flavors *flavors;
58a8cf12
WAA		 8888 struct nfs4_secinfo4 *secinfo;
8889 int i;
fca78d6d
BS		 8890
8891 page = alloc_page(GFP_KERNEL);
8892 if (!page) {
8893 err = -ENOMEM;
8894 goto out;
8895 }
8896
8897 flavors = page_address(page);
8898 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
8899
8900 /*
8901 * Fall back on "guess and check" method if
8902 * the server doesn't support SECINFO_NO_NAME
8903 */
78b19bae 8904 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
fca78d6d
BS		 8905 err = nfs4_find_root_sec(server, fhandle, info);
8906 goto out_freepage;
8907 }
8908 if (err)
8909 goto out_freepage;
8910
58a8cf12
WAA		 8911 for (i = 0; i < flavors->num_flavors; i++) {
8912 secinfo = &flavors->flavors[i];
8913
8914 switch (secinfo->flavor) {
8915 case RPC_AUTH_NULL:
8916 case RPC_AUTH_UNIX:
8917 case RPC_AUTH_GSS:
8918 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
8919 &secinfo->flavor_info);
8920 break;
8921 default:
8922 flavor = RPC_AUTH_MAXFLAVOR;
8923 break;
8924 }
8925
4d4b69dd
WAA		 8926 if (!nfs_auth_info_match(&server->auth_info, flavor))
8927 flavor = RPC_AUTH_MAXFLAVOR;
8928
58a8cf12
WAA		 8929 if (flavor != RPC_AUTH_MAXFLAVOR) {
8930 err = nfs4_lookup_root_sec(server, fhandle,
8931 info, flavor);
8932 if (!err)
8933 break;
8934 }
8935 }
8936
8937 if (flavor == RPC_AUTH_MAXFLAVOR)
8938 err = -EPERM;
fca78d6d
BS		 8939
8940out_freepage:
8941 put_page(page);
8942 if (err == -EACCES)
8943 return -EPERM;
8944out:
8945 return err;
8946}
1cab0652 8947
ab7cb0df
TM		 8948static int _nfs41_test_stateid(struct nfs_server *server,
8949 nfs4_stateid *stateid,
8950 struct rpc_cred *cred)
7d974794
BS		 8951{
8952 int status;
8953 struct nfs41_test_stateid_args args = {
1cab0652 8954 .stateid = stateid,
7d974794
BS		 8955 };
8956 struct nfs41_test_stateid_res res;
8957 struct rpc_message msg = {
8958 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
8959 .rpc_argp = &args,
8960 .rpc_resp = &res,
ab7cb0df 8961 .rpc_cred = cred,
7d974794 8962 };
3787d506
WAA		 8963 struct rpc_clnt *rpc_client = server->client;
8964
8965 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8966 &rpc_client, &msg);
1cab0652 8967
38527b15 8968 dprintk("NFS call test_stateid %p\n", stateid);
a9c92d6b 8969 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 8970 nfs4_set_sequence_privileged(&args.seq_args);
3787d506 8971 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8fe72bac 8972 &args.seq_args, &res.seq_res);
38527b15
CL		 8973 if (status != NFS_OK) {
8974 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 8975 return status;
38527b15
CL		 8976 }
8977 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 8978 return -res.status;
7d974794
BS		 8979}
8980
43912bbb
TM		 8981static void nfs4_handle_delay_or_session_error(struct nfs_server *server,
8982 int err, struct nfs4_exception *exception)
8983{
8984 exception->retry = 0;
8985 switch(err) {
8986 case -NFS4ERR_DELAY:
76e8a1bd 8987 case -NFS4ERR_RETRY_UNCACHED_REP:
43912bbb
TM		 8988 nfs4_handle_exception(server, err, exception);
8989 break;
8990 case -NFS4ERR_BADSESSION:
8991 case -NFS4ERR_BADSLOT:
8992 case -NFS4ERR_BAD_HIGH_SLOT:
8993 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
8994 case -NFS4ERR_DEADSESSION:
8995 nfs4_do_handle_exception(server, err, exception);
8996 }
8997}
8998
38527b15
CL		 8999/**
9000 * nfs41_test_stateid - perform a TEST_STATEID operation
9001 *
9002 * @server: server / transport on which to perform the operation
9003 * @stateid: state ID to test
ab7cb0df 9004 * @cred: credential
38527b15
CL		 9005 *
9006 * Returns NFS_OK if the server recognizes that "stateid" is valid.
9007 * Otherwise a negative NFS4ERR value is returned if the operation
9008 * failed or the state ID is not currently valid.
9009 */
ab7cb0df
TM		 9010static int nfs41_test_stateid(struct nfs_server *server,
9011 nfs4_stateid *stateid,
9012 struct rpc_cred *cred)
7d974794
BS		 9013{
9014 struct nfs4_exception exception = { };
9015 int err;
9016 do {
ab7cb0df 9017 err = _nfs41_test_stateid(server, stateid, cred);
43912bbb 9018 nfs4_handle_delay_or_session_error(server, err, &exception);
7d974794
BS		 9019 } while (exception.retry);
9020 return err;
9021}
9aeda35f 9022
7c1d5fae
TM		 9023struct nfs_free_stateid_data {
9024 struct nfs_server *server;
9025 struct nfs41_free_stateid_args args;
9aeda35f 9026 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 9027};
9028
9029static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
9030{
9031 struct nfs_free_stateid_data *data = calldata;
7981c8a6 9032 nfs4_setup_sequence(data->server->nfs_client,
7c1d5fae
TM		 9033 &data->args.seq_args,
9034 &data->res.seq_res,
9035 task);
9036}
9037
9038static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
9039{
9040 struct nfs_free_stateid_data *data = calldata;
9041
9042 nfs41_sequence_done(task, &data->res.seq_res);
9043
9044 switch (task->tk_status) {
9045 case -NFS4ERR_DELAY:
8478eaa1 9046 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN)
7c1d5fae
TM		 9047 rpc_restart_call_prepare(task);
9048 }
9049}
9050
9051static void nfs41_free_stateid_release(void *calldata)
9052{
9053 kfree(calldata);
9054}
9055
17f26b12 9056static const struct rpc_call_ops nfs41_free_stateid_ops = {
7c1d5fae
TM		 9057 .rpc_call_prepare = nfs41_free_stateid_prepare,
9058 .rpc_call_done = nfs41_free_stateid_done,
9059 .rpc_release = nfs41_free_stateid_release,
9060};
9061
9062static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
f0b0bf88 9063 const nfs4_stateid *stateid,
ab7cb0df 9064 struct rpc_cred *cred,
7c1d5fae
TM		 9065 bool privileged)
9066{
9aeda35f
BS		 9067 struct rpc_message msg = {
9068 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 9069 .rpc_cred = cred,
9aeda35f 9070 };
7c1d5fae
TM		 9071 struct rpc_task_setup task_setup = {
9072 .rpc_client = server->client,
9073 .rpc_message = &msg,
9074 .callback_ops = &nfs41_free_stateid_ops,
9075 .flags = RPC_TASK_ASYNC,
9076 };
9077 struct nfs_free_stateid_data *data;
9aeda35f 9078
3787d506
WAA		 9079 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
9080 &task_setup.rpc_client, &msg);
9081
38527b15 9082 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 9083 data = kmalloc(sizeof(*data), GFP_NOFS);
9084 if (!data)
9085 return ERR_PTR(-ENOMEM);
9086 data->server = server;
9087 nfs4_stateid_copy(&data->args.stateid, stateid);
9088
9089 task_setup.callback_data = data;
9090
9091 msg.rpc_argp = &data->args;
9092 msg.rpc_resp = &data->res;
76e8a1bd 9093 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
7c1d5fae
TM		 9094 if (privileged)
9095 nfs4_set_sequence_privileged(&data->args.seq_args);
9096
9097 return rpc_run_task(&task_setup);
9aeda35f
BS		 9098}
9099
38527b15
CL		 9100/**
9101 * nfs41_free_stateid - perform a FREE_STATEID operation
9102 *
9103 * @server: server / transport on which to perform the operation
9104 * @stateid: state ID to release
ab7cb0df 9105 * @cred: credential
f0b0bf88 9106 * @is_recovery: set to true if this call needs to be privileged
38527b15 9107 *
f0b0bf88 9108 * Note: this function is always asynchronous.
38527b15 9109 */
ab7cb0df 9110static int nfs41_free_stateid(struct nfs_server *server,
f0b0bf88
TM		 9111 const nfs4_stateid *stateid,
9112 struct rpc_cred *cred,
9113 bool is_recovery)
9aeda35f 9114{
7c1d5fae 9115 struct rpc_task *task;
7c1d5fae 9116
f0b0bf88 9117 task = _nfs41_free_stateid(server, stateid, cred, is_recovery);
7c1d5fae
TM		 9118 if (IS_ERR(task))
9119 return PTR_ERR(task);
7c1d5fae 9120 rpc_put_task(task);
f0b0bf88 9121 return 0;
9aeda35f 9122}
36281caa 9123
f1cdae87
JL		 9124static void
9125nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
c8b2d0bf 9126{
ab7cb0df 9127 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 9128
f0b0bf88 9129 nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf 9130 nfs4_free_lock_state(server, lsp);
c8b2d0bf
TM		 9131}
9132
36281caa
TM		 9133static bool nfs41_match_stateid(const nfs4_stateid *s1,
9134 const nfs4_stateid *s2)
9135{
93b717fd
TM		 9136 if (s1->type != s2->type)
9137 return false;
9138
2d2f24ad 9139 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 9140 return false;
9141
2d2f24ad 9142 if (s1->seqid == s2->seqid)
36281caa 9143 return true;
36281caa 9144
045c5519 9145 return s1->seqid == 0 || s2->seqid == 0;
36281caa
TM		 9146}
9147
557134a3
AA		 9148#endif /* CONFIG_NFS_V4_1 */
9149
36281caa
TM		 9150static bool nfs4_match_stateid(const nfs4_stateid *s1,
9151 const nfs4_stateid *s2)
9152{
f597c537 9153 return nfs4_stateid_match(s1, s2);
36281caa
TM		 9154}
9155
9156
17280175 9157static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 9158 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 9159 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 9160 .recover_open = nfs4_open_reclaim,
9161 .recover_lock = nfs4_lock_reclaim,
591d71cb 9162 .establish_clid = nfs4_init_clientid,
05f4c350 9163 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 9164};
9165
591d71cb 9166#if defined(CONFIG_NFS_V4_1)
17280175 9167static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 9168 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
9169 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
9170 .recover_open = nfs4_open_reclaim,
9171 .recover_lock = nfs4_lock_reclaim,
4d643d1d 9172 .establish_clid = nfs41_init_clientid,
fce5c838 9173 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 9174 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 9175};
9176#endif /* CONFIG_NFS_V4_1 */
9177
17280175 9178static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 9179 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
9180 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
4dfd4f7a 9181 .recover_open = nfs40_open_expired,
591d71cb
AA		 9182 .recover_lock = nfs4_lock_expired,
9183 .establish_clid = nfs4_init_clientid,
9184};
9185
9186#if defined(CONFIG_NFS_V4_1)
17280175 9187static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 9188 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 9189 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 9190 .recover_open = nfs41_open_expired,
9191 .recover_lock = nfs41_lock_expired,
4d643d1d 9192 .establish_clid = nfs41_init_clientid,
1da177e4 9193};
591d71cb 9194#endif /* CONFIG_NFS_V4_1 */
1da177e4 9195
17280175 9196static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 9197 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 9198 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 9199 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 9200};
9201
9202#if defined(CONFIG_NFS_V4_1)
17280175 9203static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 9204 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 9205 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 9206 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 9207};
9208#endif
9209
ec011fe8 9210static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
b03d735b 9211 .get_locations = _nfs40_proc_get_locations,
44c99933 9212 .fsid_present = _nfs40_proc_fsid_present,
ec011fe8
CL		 9213};
9214
9215#if defined(CONFIG_NFS_V4_1)
9216static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
b03d735b 9217 .get_locations = _nfs41_proc_get_locations,
44c99933 9218 .fsid_present = _nfs41_proc_fsid_present,
ec011fe8
CL		 9219};
9220#endif /* CONFIG_NFS_V4_1 */
9221
97dc1359
TM		 9222static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
9223 .minor_version = 0,
39c6daae
TM		 9224 .init_caps = NFS_CAP_READDIRPLUS
9225 | NFS_CAP_ATOMIC_OPEN
39c6daae 9226 | NFS_CAP_POSIX_LOCK,
abf79bb3
CL		 9227 .init_client = nfs40_init_client,
9228 .shutdown_client = nfs40_shutdown_client,
36281caa 9229 .match_stateid = nfs4_match_stateid,
fca78d6d 9230 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 9231 .free_lock_state = nfs4_release_lockowner,
45870d69 9232 .test_and_free_expired = nfs40_test_and_free_expired_stateid,
63f5f796 9233 .alloc_seqid = nfs_alloc_seqid,
9915ea7e 9234 .call_sync_ops = &nfs40_call_sync_ops,
c48f4f35
TM		 9235 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
9236 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
9237 .state_renewal_ops = &nfs40_state_renewal_ops,
ec011fe8 9238 .mig_recovery_ops = &nfs40_mig_recovery_ops,
97dc1359
TM		 9239};
9240
9241#if defined(CONFIG_NFS_V4_1)
63f5f796
TM		 9242static struct nfs_seqid *
9243nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2)
9244{
9245 return NULL;
9246}
9247
97dc1359
TM		 9248static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
9249 .minor_version = 1,
39c6daae
TM		 9250 .init_caps = NFS_CAP_READDIRPLUS
9251 | NFS_CAP_ATOMIC_OPEN
3b66486c 9252 | NFS_CAP_POSIX_LOCK
49f9a0fa 9253 | NFS_CAP_STATEID_NFSV41
e983120e 9254 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 9255 .init_client = nfs41_init_client,
9256 .shutdown_client = nfs41_shutdown_client,
36281caa 9257 .match_stateid = nfs41_match_stateid,
fca78d6d 9258 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 9259 .free_lock_state = nfs41_free_lock_state,
45870d69 9260 .test_and_free_expired = nfs41_test_and_free_expired_stateid,
63f5f796 9261 .alloc_seqid = nfs_alloc_no_seqid,
04fa2c6b 9262 .session_trunk = nfs4_test_session_trunk,
9915ea7e 9263 .call_sync_ops = &nfs41_call_sync_ops,
c48f4f35
TM		 9264 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
9265 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
9266 .state_renewal_ops = &nfs41_state_renewal_ops,
ec011fe8 9267 .mig_recovery_ops = &nfs41_mig_recovery_ops,
97dc1359
TM		 9268};
9269#endif
9270
42c2c424
SD		 9271#if defined(CONFIG_NFS_V4_2)
9272static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
9273 .minor_version = 2,
7017310a
BS		 9274 .init_caps = NFS_CAP_READDIRPLUS
9275 | NFS_CAP_ATOMIC_OPEN
7017310a
BS		 9276 | NFS_CAP_POSIX_LOCK
9277 | NFS_CAP_STATEID_NFSV41
e983120e 9278 | NFS_CAP_ATOMIC_OPEN_V1
f4ac1674 9279 | NFS_CAP_ALLOCATE
2e72448b 9280 | NFS_CAP_COPY
624bd5b7 9281 | NFS_CAP_DEALLOCATE
6c5a0d89 9282 | NFS_CAP_SEEK
e5341f3a
PT		 9283 | NFS_CAP_LAYOUTSTATS
9284 | NFS_CAP_CLONE,
abf79bb3
CL		 9285 .init_client = nfs41_init_client,
9286 .shutdown_client = nfs41_shutdown_client,
42c2c424
SD		 9287 .match_stateid = nfs41_match_stateid,
9288 .find_root_sec = nfs41_find_root_sec,
7017310a 9289 .free_lock_state = nfs41_free_lock_state,
9915ea7e 9290 .call_sync_ops = &nfs41_call_sync_ops,
45870d69 9291 .test_and_free_expired = nfs41_test_and_free_expired_stateid,
63f5f796 9292 .alloc_seqid = nfs_alloc_no_seqid,
04fa2c6b 9293 .session_trunk = nfs4_test_session_trunk,
42c2c424
SD		 9294 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
9295 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
9296 .state_renewal_ops = &nfs41_state_renewal_ops,
18e3b739 9297 .mig_recovery_ops = &nfs41_mig_recovery_ops,
42c2c424
SD		 9298};
9299#endif
9300
97dc1359
TM		 9301const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
9302 [0] = &nfs_v4_0_minor_ops,
9303#if defined(CONFIG_NFS_V4_1)
9304 [1] = &nfs_v4_1_minor_ops,
9305#endif
42c2c424
SD		 9306#if defined(CONFIG_NFS_V4_2)
9307 [2] = &nfs_v4_2_minor_ops,
9308#endif
97dc1359
TM		 9309};
9310
13997823 9311static ssize_t nfs4_listxattr(struct dentry *dentry, char *list, size_t size)
c4803c49
AG		 9312{
9313 ssize_t error, error2;
9314
9315 error = generic_listxattr(dentry, list, size);
9316 if (error < 0)
9317 return error;
9318 if (list) {
9319 list += error;
9320 size -= error;
9321 }
9322
9323 error2 = nfs4_listxattr_nfs4_label(d_inode(dentry), list, size);
9324 if (error2 < 0)
9325 return error2;
9326 return error + error2;
9327}
9328
17f26b12 9329static const struct inode_operations nfs4_dir_inode_operations = {
73a79706
BS		 9330 .create = nfs_create,
9331 .lookup = nfs_lookup,
9332 .atomic_open = nfs_atomic_open,
9333 .link = nfs_link,
9334 .unlink = nfs_unlink,
9335 .symlink = nfs_symlink,
9336 .mkdir = nfs_mkdir,
9337 .rmdir = nfs_rmdir,
9338 .mknod = nfs_mknod,
9339 .rename = nfs_rename,
9340 .permission = nfs_permission,
9341 .getattr = nfs_getattr,
9342 .setattr = nfs_setattr,
c4803c49 9343 .listxattr = nfs4_listxattr,
73a79706
BS		 9344};
9345
92e1d5be 9346static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 9347 .permission = nfs_permission,
9348 .getattr = nfs_getattr,
9349 .setattr = nfs_setattr,
c4803c49 9350 .listxattr = nfs4_listxattr,
6b3b5496
BF		 9351};
9352
509de811 9353const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 9354 .version = 4, /* protocol version */
9355 .dentry_ops = &nfs4_dentry_operations,
9356 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 9357 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 9358 .file_ops = &nfs4_file_operations,
1da177e4 9359 .getroot = nfs4_proc_get_root,
281cad46 9360 .submount = nfs4_submount,
ff9099f2 9361 .try_mount = nfs4_try_mount,
1da177e4
LT		 9362 .getattr = nfs4_proc_getattr,
9363 .setattr = nfs4_proc_setattr,
9364 .lookup = nfs4_proc_lookup,
5b5faaf6 9365 .lookupp = nfs4_proc_lookupp,
1da177e4
LT		 9366 .access = nfs4_proc_access,
9367 .readlink = nfs4_proc_readlink,
1da177e4
LT		 9368 .create = nfs4_proc_create,
9369 .remove = nfs4_proc_remove,
9370 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 9371 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4 9372 .unlink_done = nfs4_proc_unlink_done,
d3d4152a 9373 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 9374 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 9375 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 9376 .link = nfs4_proc_link,
9377 .symlink = nfs4_proc_symlink,
9378 .mkdir = nfs4_proc_mkdir,
9379 .rmdir = nfs4_proc_remove,
9380 .readdir = nfs4_proc_readdir,
9381 .mknod = nfs4_proc_mknod,
9382 .statfs = nfs4_proc_statfs,
9383 .fsinfo = nfs4_proc_fsinfo,
9384 .pathconf = nfs4_proc_pathconf,
e9326dca 9385 .set_capabilities = nfs4_server_capabilities,
1da177e4 9386 .decode_dirent = nfs4_decode_dirent,
a4cdda59 9387 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
1da177e4 9388 .read_setup = nfs4_proc_read_setup,
ec06c096 9389 .read_done = nfs4_read_done,
1da177e4 9390 .write_setup = nfs4_proc_write_setup,
788e7a89 9391 .write_done = nfs4_write_done,
1da177e4 9392 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 9393 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 9394 .commit_done = nfs4_commit_done,
1da177e4 9395 .lock = nfs4_proc_lock,
e50a1c2e 9396 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 9397 .close_context = nfs4_close_context,
2b484297 9398 .open_context = nfs4_atomic_open,
011e2a7f 9399 .have_delegation = nfs4_have_delegation,
57ec14c5 9400 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 9401 .alloc_client = nfs4_alloc_client,
45a52a02 9402 .init_client = nfs4_init_client,
cdb7eced 9403 .free_client = nfs4_free_client,
1179acc6
BS		 9404 .create_server = nfs4_create_server,
9405 .clone_server = nfs_clone_server,
1da177e4
LT		 9406};
9407
64c2ce8b 9408static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
98e9cb57 9409 .name = XATTR_NAME_NFSV4_ACL,
64c2ce8b
AK		 9410 .list = nfs4_xattr_list_nfs4_acl,
9411 .get = nfs4_xattr_get_nfs4_acl,
9412 .set = nfs4_xattr_set_nfs4_acl,
9413};
9414
9415const struct xattr_handler *nfs4_xattr_handlers[] = {
9416 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 9417#ifdef CONFIG_NFS_V4_SECURITY_LABEL
9418 &nfs4_xattr_nfs4_label_handler,
9419#endif
64c2ce8b
AK		 9420 NULL
9421};
9422
1da177e4
LT		 9423/*
9424 * Local variables:
9425 * c-basic-offset: 8
9426 * End:
9427 */
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