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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 <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
1da177e4
LT		 39#include <linux/delay.h>
40#include <linux/errno.h>
41#include <linux/string.h>
652f89f6
TM		 42#include <linux/ratelimit.h>
43#include <linux/printk.h>
5a0e3ad6 44#include <linux/slab.h>
1da177e4
LT		 45#include <linux/sunrpc/clnt.h>
46#include <linux/nfs.h>
47#include <linux/nfs4.h>
48#include <linux/nfs_fs.h>
49#include <linux/nfs_page.h>
9b7160c5 50#include <linux/nfs_mount.h>
1da177e4 51#include <linux/namei.h>
02a913a7 52#include <linux/mount.h>
99fe60d0 53#include <linux/module.h>
64c2ce8b 54#include <linux/xattr.h>
c7a360b0 55#include <linux/utsname.h>
d310310c 56#include <linux/freezer.h>
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 2594 if (opendata->o_arg.createmode != NFS4_CREATE_EXCLUSIVE &&
501e7a46
BC		 2595 (attrset[1] & FATTR4_WORD1_MODE ||
2596 attrset[2] & FATTR4_WORD2_MODE_UMASK))
5334c5bd
KM		 2597 sattr->ia_valid &= ~ATTR_MODE;
2598
2599 if (attrset[2] & FATTR4_WORD2_SECURITY_LABEL)
2600 *label = NULL;
aa53ed54
JL		 2601}
2602
c21443c2
TM		 2603static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2604 fmode_t fmode,
2605 int flags,
3efb9722 2606 struct nfs_open_context *ctx)
c21443c2
TM		 2607{
2608 struct nfs4_state_owner *sp = opendata->owner;
2609 struct nfs_server *server = sp->so_server;
275bb307 2610 struct dentry *dentry;
c21443c2
TM		 2611 struct nfs4_state *state;
2612 unsigned int seq;
2613 int ret;
2614
2615 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2616
2617 ret = _nfs4_proc_open(opendata);
dca78001 2618 if (ret != 0)
c21443c2
TM		 2619 goto out;
2620
2621 state = nfs4_opendata_to_nfs4_state(opendata);
2622 ret = PTR_ERR(state);
2623 if (IS_ERR(state))
2624 goto out;
a974deee 2625 ctx->state = state;
c21443c2
TM		 2626 if (server->caps & NFS_CAP_POSIX_LOCK)
2627 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
a8ce377a
JL		 2628 if (opendata->o_res.rflags & NFS4_OPEN_RESULT_MAY_NOTIFY_LOCK)
2629 set_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags);
c21443c2 2630
275bb307 2631 dentry = opendata->dentry;
2b0143b5 2632 if (d_really_is_negative(dentry)) {
668d0cd5 2633 struct dentry *alias;
275bb307 2634 d_drop(dentry);
668d0cd5
AV		 2635 alias = d_exact_alias(dentry, state->inode);
2636 if (!alias)
2637 alias = d_splice_alias(igrab(state->inode), dentry);
2638 /* d_splice_alias() can't fail here - it's a non-directory */
2639 if (alias) {
275bb307 2640 dput(ctx->dentry);
668d0cd5 2641 ctx->dentry = dentry = alias;
275bb307
TM		 2642 }
2643 nfs_set_verifier(dentry,
2b0143b5 2644 nfs_save_change_attribute(d_inode(opendata->dir)));
275bb307
TM		 2645 }
2646
c21443c2
TM		 2647 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2648 if (ret != 0)
2649 goto out;
2650
2b0143b5 2651 if (d_inode(dentry) == state->inode) {
c45ffdd2
TM		 2652 nfs_inode_attach_open_context(ctx);
2653 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2654 nfs4_schedule_stateid_recovery(server, state);
2655 }
c21443c2
TM		 2656out:
2657 return ret;
2658}
2659
1da177e4 2660/*
24ac23ab 2661 * Returns a referenced nfs4_state
1da177e4 2662 */
82be417a 2663static int _nfs4_do_open(struct inode *dir,
4197a055 2664 struct nfs_open_context *ctx,
82be417a
AA		 2665 int flags,
2666 struct iattr *sattr,
5bc2afc2
TM		 2667 struct nfs4_label *label,
2668 int *opened)
1da177e4
LT		 2669{
2670 struct nfs4_state_owner *sp;
2671 struct nfs4_state *state = NULL;
2672 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 2673 struct nfs4_opendata *opendata;
4197a055
TM		 2674 struct dentry *dentry = ctx->dentry;
2675 struct rpc_cred *cred = ctx->cred;
2676 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2677 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
49f9a0fa 2678 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
1775fd3e 2679 struct nfs4_label *olabel = NULL;
aac00a8d 2680 int status;
1da177e4
LT		 2681
2682 /* Protect against reboot recovery conflicts */
1da177e4 2683 status = -ENOMEM;
d1e284d5
TM		 2684 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2685 if (sp == NULL) {
1da177e4
LT		 2686 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2687 goto out_err;
2688 }
334f87dd 2689 status = nfs4_client_recover_expired_lease(server->nfs_client);
58d9714a 2690 if (status != 0)
b4454fe1 2691 goto err_put_state_owner;
2b0143b5
DH		 2692 if (d_really_is_positive(dentry))
2693 nfs4_return_incompatible_delegation(d_inode(dentry), fmode);
58d9714a 2694 status = -ENOMEM;
2b0143b5 2695 if (d_really_is_positive(dentry))
49f9a0fa 2696 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2697 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
1775fd3e 2698 label, claim, GFP_KERNEL);
e56e0b78 2699 if (opendata == NULL)
95d35cb4 2700 goto err_put_state_owner;
1da177e4 2701
14c43f76
DQ		 2702 if (label) {
2703 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2704 if (IS_ERR(olabel)) {
2705 status = PTR_ERR(olabel);
2706 goto err_opendata_put;
2707 }
2708 }
2709
e911b815
TM		 2710 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2711 if (!opendata->f_attr.mdsthreshold) {
2712 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2713 if (!opendata->f_attr.mdsthreshold)
2714 goto err_free_label;
2715 }
1549210f 2716 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2717 }
2b0143b5
DH		 2718 if (d_really_is_positive(dentry))
2719 opendata->state = nfs4_get_open_state(d_inode(dentry), sp);
aac00a8d 2720
3efb9722 2721 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
6168f62c 2722 if (status != 0)
14c43f76 2723 goto err_free_label;
3efb9722 2724 state = ctx->state;
6168f62c 2725
efcbc04e 2726 if ((opendata->o_arg.open_flags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) &&
549b19cc 2727 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
5334c5bd 2728 nfs4_exclusive_attrset(opendata, sattr, &label);
a1d1c4f1
TM		 2729 /*
2730 * send create attributes which was not set by open
2731 * with an extra setattr.
2732 */
2733 if (sattr->ia_valid & NFS4_VALID_ATTRS) {
2734 nfs_fattr_init(opendata->o_res.f_attr);
2735 status = nfs4_do_setattr(state->inode, cred,
2736 opendata->o_res.f_attr, sattr,
29b59f94 2737 ctx, label, olabel);
a1d1c4f1
TM		 2738 if (status == 0) {
2739 nfs_setattr_update_inode(state->inode, sattr,
2740 opendata->o_res.f_attr);
2741 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
2742 }
1775fd3e 2743 }
0ab64e0e 2744 }
c5c3fb5f 2745 if (opened && opendata->file_created)
5bc2afc2 2746 *opened |= FILE_CREATED;
82be417a 2747
e911b815 2748 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
82be417a 2749 *ctx_th = opendata->f_attr.mdsthreshold;
e911b815
TM		 2750 opendata->f_attr.mdsthreshold = NULL;
2751 }
82be417a 2752
14c43f76
DQ		 2753 nfs4_label_free(olabel);
2754
c6d00e63 2755 nfs4_opendata_put(opendata);
1da177e4 2756 nfs4_put_state_owner(sp);
1da177e4 2757 return 0;
14c43f76
DQ		 2758err_free_label:
2759 nfs4_label_free(olabel);
c6d00e63
TM		 2760err_opendata_put:
2761 nfs4_opendata_put(opendata);
e56e0b78
TM		 2762err_put_state_owner:
2763 nfs4_put_state_owner(sp);
1da177e4 2764out_err:
1da177e4
LT		 2765 return status;
2766}
2767
2768
82be417a 2769static struct nfs4_state *nfs4_do_open(struct inode *dir,
4197a055 2770 struct nfs_open_context *ctx,
82be417a
AA		 2771 int flags,
2772 struct iattr *sattr,
5bc2afc2
TM		 2773 struct nfs4_label *label,
2774 int *opened)
1da177e4 2775{
49f9a0fa 2776 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2777 struct nfs4_exception exception = { };
2778 struct nfs4_state *res;
2779 int status;
2780
2781 do {
5bc2afc2 2782 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
3efb9722 2783 res = ctx->state;
42113a75 2784 trace_nfs4_open_file(ctx, flags, status);
1da177e4
LT		 2785 if (status == 0)
2786 break;
2787 /* NOTE: BAD_SEQID means the server and client disagree about the
2788 * book-keeping w.r.t. state-changing operations
2789 * (OPEN/CLOSE/LOCK/LOCKU...)
2790 * It is actually a sign of a bug on the client or on the server.
2791 *
2792 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2793 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2794 * have unhashed the old state_owner for us, and that we can
2795 * therefore safely retry using a new one. We should still warn
2796 * the user though...
2797 */
2798 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2799 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2800 " returned a bad sequence-id error!\n",
2801 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2802 exception.retry = 1;
2803 continue;
2804 }
550f5747
TM		 2805 /*
2806 * BAD_STATEID on OPEN means that the server cancelled our
2807 * state before it received the OPEN_CONFIRM.
2808 * Recover by retrying the request as per the discussion
2809 * on Page 181 of RFC3530.
2810 */
2811 if (status == -NFS4ERR_BAD_STATEID) {
2812 exception.retry = 1;
2813 continue;
2814 }
aac00a8d
TM		 2815 if (status == -EAGAIN) {
2816 /* We must have found a delegation */
2817 exception.retry = 1;
2818 continue;
2819 }
49f9a0fa
TM		 2820 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2821 continue;
2822 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2823 status, &exception));
2824 } while (exception.retry);
2825 return res;
2826}
2827
8487c479
TM		 2828static int _nfs4_do_setattr(struct inode *inode,
2829 struct nfs_setattrargs *arg,
2830 struct nfs_setattrres *res,
2831 struct rpc_cred *cred,
29b59f94 2832 struct nfs_open_context *ctx)
1da177e4 2833{
3e4f6290 2834 struct nfs_server *server = NFS_SERVER(inode);
d9b67e1e 2835 struct rpc_message msg = {
659bfcd6 2836 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
8487c479
TM		 2837 .rpc_argp = arg,
2838 .rpc_resp = res,
659bfcd6 2839 .rpc_cred = cred,
d9b67e1e 2840 };
abf4e13c 2841 struct rpc_cred *delegation_cred = NULL;
26e976a8 2842 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2843 fmode_t fmode;
2844 bool truncate;
65e4308d 2845 int status;
1da177e4 2846
8487c479 2847 nfs_fattr_init(res->fattr);
1da177e4 2848
ee3ae84e 2849 /* Servers should only apply open mode checks for file size changes */
8487c479 2850 truncate = (arg->iap->ia_valid & ATTR_SIZE) ? true : false;
ee3ae84e
TM		 2851 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2852
8487c479 2853 if (nfs4_copy_delegation_stateid(inode, fmode, &arg->stateid, &delegation_cred)) {
ee3ae84e 2854 /* Use that stateid */
29b59f94 2855 } else if (truncate && ctx != NULL) {
17393475 2856 struct nfs_lock_context *l_ctx;
29b59f94 2857 if (!nfs4_valid_open_stateid(ctx->state))
0418dae1 2858 return -EBADF;
17393475
N		 2859 l_ctx = nfs_get_lock_context(ctx);
2860 if (IS_ERR(l_ctx))
2861 return PTR_ERR(l_ctx);
7a0566b3
N		 2862 status = nfs4_select_rw_stateid(ctx->state, FMODE_WRITE, l_ctx,
2863 &arg->stateid, &delegation_cred);
2864 nfs_put_lock_context(l_ctx);
2865 if (status == -EIO)
0418dae1 2866 return -EBADF;
08e9eac4 2867 } else
8487c479 2868 nfs4_stateid_copy(&arg->stateid, &zero_stateid);
abf4e13c
TM		 2869 if (delegation_cred)
2870 msg.rpc_cred = delegation_cred;
1da177e4 2871
8487c479 2872 status = nfs4_call_sync(server->client, server, &msg, &arg->seq_args, &res->seq_res, 1);
abf4e13c
TM		 2873
2874 put_rpccred(delegation_cred);
29b59f94 2875 if (status == 0 && ctx != NULL)
26e976a8 2876 renew_lease(server, timestamp);
8487c479 2877 trace_nfs4_setattr(inode, &arg->stateid, status);
65e4308d 2878 return status;
1da177e4
LT		 2879}
2880
659bfcd6
TM		 2881static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2882 struct nfs_fattr *fattr, struct iattr *sattr,
29b59f94 2883 struct nfs_open_context *ctx, struct nfs4_label *ilabel,
1775fd3e 2884 struct nfs4_label *olabel)
1da177e4 2885{
3e4f6290 2886 struct nfs_server *server = NFS_SERVER(inode);
29b59f94 2887 struct nfs4_state *state = ctx ? ctx->state : NULL;
d9b67e1e
AS		 2888 struct nfs_setattrargs arg = {
2889 .fh = NFS_FH(inode),
2890 .iap = sattr,
8487c479
TM		 2891 .server = server,
2892 .bitmask = server->attr_bitmask,
2893 .label = ilabel,
d9b67e1e
AS		 2894 };
2895 struct nfs_setattrres res = {
8487c479
TM		 2896 .fattr = fattr,
2897 .label = olabel,
2898 .server = server,
d9b67e1e 2899 };
a1d0b5ee
TM		 2900 struct nfs4_exception exception = {
2901 .state = state,
3114ea7a 2902 .inode = inode,
8487c479 2903 .stateid = &arg.stateid,
a1d0b5ee 2904 };
1da177e4 2905 int err;
8487c479
TM		 2906
2907 arg.bitmask = nfs4_bitmask(server, ilabel);
2908 if (ilabel)
2909 arg.bitmask = nfs4_bitmask(server, olabel);
2910
1da177e4 2911 do {
29b59f94 2912 err = _nfs4_do_setattr(inode, &arg, &res, cred, ctx);
451146be
TM		 2913 switch (err) {
2914 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 2915 if (!(sattr->ia_valid & ATTR_SIZE)) {
2916 pr_warn_once("NFSv4: server %s is incorrectly "
2917 "applying open mode checks to "
2918 "a SETATTR that is not "
2919 "changing file size.\n",
2920 server->nfs_client->cl_hostname);
2921 }
451146be
TM		 2922 if (state && !(state->state & FMODE_WRITE)) {
2923 err = -EBADF;
2924 if (sattr->ia_valid & ATTR_OPEN)
2925 err = -EACCES;
2926 goto out;
2927 }
2928 }
2929 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2930 } while (exception.retry);
451146be 2931out:
1da177e4
LT		 2932 return err;
2933}
2934
500d701f
PT		 2935static bool
2936nfs4_wait_on_layoutreturn(struct inode *inode, struct rpc_task *task)
2937{
2938 if (inode == NULL || !nfs_have_layout(inode))
2939 return false;
2940
2941 return pnfs_wait_on_layoutreturn(inode, task);
2942}
2943
1da177e4
LT		 2944struct nfs4_closedata {
2945 struct inode *inode;
2946 struct nfs4_state *state;
2947 struct nfs_closeargs arg;
2948 struct nfs_closeres res;
cf805165
TM		 2949 struct {
2950 struct nfs4_layoutreturn_args arg;
2951 struct nfs4_layoutreturn_res res;
4d796d75 2952 struct nfs4_xdr_opaque_data ld_private;
cf805165
TM		 2953 u32 roc_barrier;
2954 bool roc;
2955 } lr;
516a6af6 2956 struct nfs_fattr fattr;
26e976a8 2957 unsigned long timestamp;
1da177e4
LT		 2958};
2959
963d8fe5 2960static void nfs4_free_closedata(void *data)
9512135d 2961{
963d8fe5
TM		 2962 struct nfs4_closedata *calldata = data;
2963 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2964 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2965
cf805165 2966 if (calldata->lr.roc)
1c5bd76d
TM		 2967 pnfs_roc_release(&calldata->lr.arg, &calldata->lr.res,
2968 calldata->res.lr_ret);
9512135d
TM		 2969 nfs4_put_open_state(calldata->state);
2970 nfs_free_seqid(calldata->arg.seqid);
9512135d 2971 nfs4_put_state_owner(sp);
322b2b90 2972 nfs_sb_deactive(sb);
9512135d
TM		 2973 kfree(calldata);
2974}
2975
963d8fe5 2976static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2977{
963d8fe5 2978 struct nfs4_closedata *calldata = data;
1da177e4 2979 struct nfs4_state *state = calldata->state;
1da177e4 2980 struct nfs_server *server = NFS_SERVER(calldata->inode);
412f6c4c 2981 nfs4_stateid *res_stateid = NULL;
1da177e4 2982
a3ca5651 2983 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2984 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2985 return;
42113a75 2986 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
cf805165
TM		 2987
2988 /* Handle Layoutreturn errors */
2989 if (calldata->arg.lr_args && task->tk_status != 0) {
2990 switch (calldata->res.lr_ret) {
2991 default:
2992 calldata->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
2993 break;
2994 case 0:
2995 calldata->arg.lr_args = NULL;
2996 calldata->res.lr_res = NULL;
2997 break;
2998 case -NFS4ERR_ADMIN_REVOKED:
2999 case -NFS4ERR_DELEG_REVOKED:
3000 case -NFS4ERR_EXPIRED:
3001 case -NFS4ERR_BAD_STATEID:
3002 case -NFS4ERR_OLD_STATEID:
3003 case -NFS4ERR_UNKNOWN_LAYOUTTYPE:
3004 case -NFS4ERR_WRONG_CRED:
3005 calldata->arg.lr_args = NULL;
3006 calldata->res.lr_res = NULL;
3007 calldata->res.lr_ret = 0;
3008 rpc_restart_call_prepare(task);
3009 return;
3010 }
3011 }
3012
d9b67e1e 3013 /* hmm. we are done with the inode, and in the process of freeing
1da177e4
LT		 3014 * the state_owner. we keep this around to process errors
3015 */
1da177e4
LT		 3016 switch (task->tk_status) {
3017 case 0:
412f6c4c 3018 res_stateid = &calldata->res.stateid;
26e976a8 3019 renew_lease(server, calldata->timestamp);
412f6c4c 3020 break;
f07d4a31
TM		 3021 case -NFS4ERR_ACCESS:
3022 if (calldata->arg.bitmask != NULL) {
3023 calldata->arg.bitmask = NULL;
3024 calldata->res.fattr = NULL;
3025 task->tk_status = 0;
3026 rpc_restart_call_prepare(task);
3027 goto out_release;
3028
3029 }
3030 break;
69794ad7 3031 case -NFS4ERR_ADMIN_REVOKED:
1da177e4 3032 case -NFS4ERR_STALE_STATEID:
26d36301
TM		 3033 case -NFS4ERR_EXPIRED:
3034 nfs4_free_revoked_stateid(server,
3035 &calldata->arg.stateid,
3036 task->tk_msg.rpc_cred);
9e33bed5
TM		 3037 case -NFS4ERR_OLD_STATEID:
3038 case -NFS4ERR_BAD_STATEID:
566fcec6 3039 if (!nfs4_stateid_match(&calldata->arg.stateid,
369d6b7f 3040 &state->open_stateid)) {
566fcec6
TM		 3041 rpc_restart_call_prepare(task);
3042 goto out_release;
3043 }
dc0b027d 3044 if (calldata->arg.fmode == 0)
9e33bed5 3045 break;
1da177e4 3046 default:
8478eaa1 3047 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN) {
72211dbe 3048 rpc_restart_call_prepare(task);
69794ad7
TM		 3049 goto out_release;
3050 }
1da177e4 3051 }
4a1e2feb
TM		 3052 nfs_clear_open_stateid(state, &calldata->arg.stateid,
3053 res_stateid, calldata->arg.fmode);
69794ad7 3054out_release:
72211dbe 3055 nfs_release_seqid(calldata->arg.seqid);
d8d84983 3056 nfs_refresh_inode(calldata->inode, &calldata->fattr);
a3ca5651 3057 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 3058}
3059
4ce70ada 3060static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 3061{
4ce70ada 3062 struct nfs4_closedata *calldata = data;
9512135d 3063 struct nfs4_state *state = calldata->state;
7fdab069 3064 struct inode *inode = calldata->inode;
aee7af35 3065 bool is_rdonly, is_wronly, is_rdwr;
88069f77 3066 int call_close = 0;
9512135d 3067
a3ca5651 3068 dprintk("%s: begin!\n", __func__);
963d8fe5 3069 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 3070 goto out_wait;
003707c7 3071
88069f77 3072 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
4cecb76f 3073 spin_lock(&state->owner->so_lock);
aee7af35
TM		 3074 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
3075 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
3076 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
369d6b7f 3077 nfs4_stateid_copy(&calldata->arg.stateid, &state->open_stateid);
003707c7 3078 /* Calculate the change in open mode */
cd9288ff 3079 calldata->arg.fmode = 0;
e7616923 3080 if (state->n_rdwr == 0) {
cd9288ff
TM		 3081 if (state->n_rdonly == 0)
3082 call_close |= is_rdonly;
3083 else if (is_rdonly)
3084 calldata->arg.fmode |= FMODE_READ;
3085 if (state->n_wronly == 0)
3086 call_close |= is_wronly;
3087 else if (is_wronly)
3088 calldata->arg.fmode |= FMODE_WRITE;
e547f262
TM		 3089 if (calldata->arg.fmode != (FMODE_READ|FMODE_WRITE))
3090 call_close |= is_rdwr;
cd9288ff
TM		 3091 } else if (is_rdwr)
3092 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
3093
5cc7861e
TM		 3094 if (!nfs4_valid_open_stateid(state) ||
3095 test_bit(NFS_OPEN_STATE, &state->flags) == 0)
5d422301 3096 call_close = 0;
4cecb76f 3097 spin_unlock(&state->owner->so_lock);
88069f77
TM		 3098
3099 if (!call_close) {
963d8fe5 3100 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 3101 goto out_no_action;
9512135d 3102 }
88069f77 3103
1c5bd76d 3104 if (!calldata->lr.roc && nfs4_wait_on_layoutreturn(inode, task)) {
500d701f
PT		 3105 nfs_release_seqid(calldata->arg.seqid);
3106 goto out_wait;
3107 }
3108
9413a1a1 3109 if (calldata->arg.fmode == 0)
88069f77 3110 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
3ecefc92 3111
9413a1a1 3112 if (calldata->arg.fmode == 0 || calldata->arg.fmode == FMODE_READ) {
3ecefc92
TM		 3113 /* Close-to-open cache consistency revalidation */
3114 if (!nfs4_have_delegation(inode, FMODE_READ))
3115 calldata->arg.bitmask = NFS_SERVER(inode)->cache_consistency_bitmask;
3116 else
3117 calldata->arg.bitmask = NULL;
3118 }
3c13cb5b 3119
6ae37339
TM		 3120 calldata->arg.share_access =
3121 nfs4_map_atomic_open_share(NFS_SERVER(inode),
3122 calldata->arg.fmode, 0);
88069f77 3123
d8d84983
TM		 3124 if (calldata->res.fattr == NULL)
3125 calldata->arg.bitmask = NULL;
3126 else if (calldata->arg.bitmask == NULL)
3127 calldata->res.fattr = NULL;
26e976a8 3128 calldata->timestamp = jiffies;
42e1cca7 3129 if (nfs4_setup_sequence(NFS_SERVER(inode)->nfs_client,
9d12b216
TM		 3130 &calldata->arg.seq_args,
3131 &calldata->res.seq_res,
2240a9e2
TM		 3132 task) != 0)
3133 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 3134 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 3135 return;
3136out_no_action:
3137 task->tk_action = NULL;
3138out_wait:
3139 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 3140}
3141
963d8fe5 3142static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 3143 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 3144 .rpc_call_done = nfs4_close_done,
3145 .rpc_release = nfs4_free_closedata,
3146};
3147
1da177e4
LT		 3148/*
3149 * It is possible for data to be read/written from a mem-mapped file
3150 * after the sys_close call (which hits the vfs layer as a flush).
3151 * This means that we can't safely call nfsv4 close on a file until
3152 * the inode is cleared. This in turn means that we are not good
3153 * NFSv4 citizens - we do not indicate to the server to update the file's
3154 * share state even when we are done with one of the three share
3155 * stateid's in the inode.
3156 *
3157 * NOTE: Caller must be holding the sp->so_owner semaphore!
3158 */
1f7977c1 3159int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 3160{
4a35bd41 3161 struct nfs_server *server = NFS_SERVER(state->inode);
63f5f796 3162 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
1da177e4 3163 struct nfs4_closedata *calldata;
b39e625b
TM		 3164 struct nfs4_state_owner *sp = state->owner;
3165 struct rpc_task *task;
5138fde0
TM		 3166 struct rpc_message msg = {
3167 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
3168 .rpc_cred = state->owner->so_cred,
3169 };
c970aa85
TM		 3170 struct rpc_task_setup task_setup_data = {
3171 .rpc_client = server->client,
5138fde0 3172 .rpc_message = &msg,
c970aa85 3173 .callback_ops = &nfs4_close_ops,
101070ca 3174 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3175 .flags = RPC_TASK_ASYNC,
3176 };
9512135d 3177 int status = -ENOMEM;
1da177e4 3178
fa940720
WAA		 3179 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
3180 &task_setup_data.rpc_client, &msg);
3181
8535b2be 3182 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 3183 if (calldata == NULL)
9512135d 3184 goto out;
a9c92d6b 3185 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 3186 calldata->inode = state->inode;
1da177e4 3187 calldata->state = state;
4a35bd41 3188 calldata->arg.fh = NFS_FH(state->inode);
1da177e4 3189 /* Serialization for the sequence id */
63f5f796
TM		 3190 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
3191 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask);
badc76dd 3192 if (IS_ERR(calldata->arg.seqid))
9512135d 3193 goto out_free_calldata;
d8d84983 3194 nfs_fattr_init(&calldata->fattr);
dc0b027d 3195 calldata->arg.fmode = 0;
4d796d75 3196 calldata->lr.arg.ld_private = &calldata->lr.ld_private;
516a6af6 3197 calldata->res.fattr = &calldata->fattr;
c1d51931 3198 calldata->res.seqid = calldata->arg.seqid;
516a6af6 3199 calldata->res.server = server;
cf805165 3200 calldata->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
1c5bd76d
TM		 3201 calldata->lr.roc = pnfs_roc(state->inode,
3202 &calldata->lr.arg, &calldata->lr.res, msg.rpc_cred);
3203 if (calldata->lr.roc) {
3204 calldata->arg.lr_args = &calldata->lr.arg;
3205 calldata->res.lr_res = &calldata->lr.res;
3206 }
643168c2 3207 nfs_sb_active(calldata->inode->i_sb);
9512135d 3208
1174dd1f
TM		 3209 msg.rpc_argp = &calldata->arg;
3210 msg.rpc_resp = &calldata->res;
c970aa85
TM		 3211 task_setup_data.callback_data = calldata;
3212 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 3213 if (IS_ERR(task))
3214 return PTR_ERR(task);
a49c3c77
TM		 3215 status = 0;
3216 if (wait)
3217 status = rpc_wait_for_completion_task(task);
b39e625b 3218 rpc_put_task(task);
a49c3c77 3219 return status;
9512135d
TM		 3220out_free_calldata:
3221 kfree(calldata);
3222out:
b39e625b
TM		 3223 nfs4_put_open_state(state);
3224 nfs4_put_state_owner(sp);
9512135d 3225 return status;
1da177e4
LT		 3226}
3227
2b484297 3228static struct inode *
5bc2afc2
TM		 3229nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
3230 int open_flags, struct iattr *attr, int *opened)
1da177e4 3231{
1da177e4 3232 struct nfs4_state *state;
aa9c2669
DQ		 3233 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
3234
3235 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
1da177e4 3236
565277f6 3237 /* Protect against concurrent sillydeletes */
5bc2afc2 3238 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
aa9c2669
DQ		 3239
3240 nfs4_label_release_security(label);
3241
f46e0bd3
TM		 3242 if (IS_ERR(state))
3243 return ERR_CAST(state);
275bb307 3244 return state->inode;
1da177e4
LT		 3245}
3246
1185a552 3247static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 3248{
3249 if (ctx->state == NULL)
3250 return;
3251 if (is_sync)
643168c2 3252 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 3253 else
643168c2 3254 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 3255}
1da177e4 3256
b944dba3
TM		 3257#define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
3258#define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
dff25ddb 3259#define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_MODE_UMASK - 1UL)
b944dba3 3260
1da177e4
LT		 3261static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
3262{
8c61282f 3263 u32 bitmask[3] = {}, minorversion = server->nfs_client->cl_minorversion;
43652ad5
BH		 3264 struct nfs4_server_caps_arg args = {
3265 .fhandle = fhandle,
8c61282f 3266 .bitmask = bitmask,
43652ad5 3267 };
1da177e4
LT		 3268 struct nfs4_server_caps_res res = {};
3269 struct rpc_message msg = {
3270 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 3271 .rpc_argp = &args,
1da177e4
LT		 3272 .rpc_resp = &res,
3273 };
3274 int status;
f4b23de3 3275 int i;
1da177e4 3276
8c61282f
KM		 3277 bitmask[0] = FATTR4_WORD0_SUPPORTED_ATTRS |
3278 FATTR4_WORD0_FH_EXPIRE_TYPE |
3279 FATTR4_WORD0_LINK_SUPPORT |
3280 FATTR4_WORD0_SYMLINK_SUPPORT |
3281 FATTR4_WORD0_ACLSUPPORT;
3282 if (minorversion)
3283 bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3284
7c513058 3285 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3286 if (status == 0) {
b944dba3 3287 /* Sanity check the server answers */
8c61282f 3288 switch (minorversion) {
b944dba3
TM		 3289 case 0:
3290 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
3291 res.attr_bitmask[2] = 0;
3292 break;
3293 case 1:
3294 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
3295 break;
3296 case 2:
3297 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
3298 }
1da177e4 3299 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 3300 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
3301 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
3302 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
3303 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
b944dba3
TM		 3304 NFS_CAP_CTIME|NFS_CAP_MTIME|
3305 NFS_CAP_SECURITY_LABEL);
7dd7d959
MN		 3306 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
3307 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
1da177e4
LT		 3308 server->caps |= NFS_CAP_ACLS;
3309 if (res.has_links != 0)
3310 server->caps |= NFS_CAP_HARDLINKS;
3311 if (res.has_symlinks != 0)
3312 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 3313 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
3314 server->caps |= NFS_CAP_FILEID;
3315 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
3316 server->caps |= NFS_CAP_MODE;
3317 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
3318 server->caps |= NFS_CAP_NLINK;
3319 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
3320 server->caps |= NFS_CAP_OWNER;
3321 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
3322 server->caps |= NFS_CAP_OWNER_GROUP;
3323 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
3324 server->caps |= NFS_CAP_ATIME;
3325 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
3326 server->caps |= NFS_CAP_CTIME;
3327 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
3328 server->caps |= NFS_CAP_MTIME;
aa9c2669
DQ		 3329#ifdef CONFIG_NFS_V4_SECURITY_LABEL
3330 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
3331 server->caps |= NFS_CAP_SECURITY_LABEL;
3332#endif
3333 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
3334 sizeof(server->attr_bitmask));
b944dba3 3335 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
62ab460c 3336
a65318bf
TM		 3337 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
3338 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
3339 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
b944dba3 3340 server->cache_consistency_bitmask[2] = 0;
f4b23de3
TM		 3341
3342 /* Avoid a regression due to buggy server */
3343 for (i = 0; i < ARRAY_SIZE(res.exclcreat_bitmask); i++)
3344 res.exclcreat_bitmask[i] &= res.attr_bitmask[i];
8c61282f
KM		 3345 memcpy(server->exclcreat_bitmask, res.exclcreat_bitmask,
3346 sizeof(server->exclcreat_bitmask));
f4b23de3 3347
1da177e4 3348 server->acl_bitmask = res.acl_bitmask;
264e6351 3349 server->fh_expire_type = res.fh_expire_type;
1da177e4 3350 }
cccef3b9 3351
1da177e4
LT		 3352 return status;
3353}
3354
55a97593 3355int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 3356{
3357 struct nfs4_exception exception = { };
3358 int err;
3359 do {
3360 err = nfs4_handle_exception(server,
3361 _nfs4_server_capabilities(server, fhandle),
3362 &exception);
3363 } while (exception.retry);
3364 return err;
3365}
3366
3367static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3368 struct nfs_fsinfo *info)
3369{
aa9c2669 3370 u32 bitmask[3];
1da177e4 3371 struct nfs4_lookup_root_arg args = {
aa9c2669 3372 .bitmask = bitmask,
1da177e4
LT		 3373 };
3374 struct nfs4_lookup_res res = {
3375 .server = server,
0e574af1 3376 .fattr = info->fattr,
1da177e4
LT		 3377 .fh = fhandle,
3378 };
3379 struct rpc_message msg = {
3380 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
3381 .rpc_argp = &args,
3382 .rpc_resp = &res,
3383 };
008f55d0 3384
aa9c2669
DQ		 3385 bitmask[0] = nfs4_fattr_bitmap[0];
3386 bitmask[1] = nfs4_fattr_bitmap[1];
3387 /*
3388 * Process the label in the upcoming getfattr
3389 */
3390 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
3391
0e574af1 3392 nfs_fattr_init(info->fattr);
7c513058 3393 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3394}
3395
3396static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3397 struct nfs_fsinfo *info)
3398{
3399 struct nfs4_exception exception = { };
3400 int err;
3401 do {
fb8a5ba8 3402 err = _nfs4_lookup_root(server, fhandle, info);
b5f875a9 3403 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
fb8a5ba8
BS		 3404 switch (err) {
3405 case 0:
3406 case -NFS4ERR_WRONGSEC:
05e9cfb4 3407 goto out;
fb8a5ba8
BS		 3408 default:
3409 err = nfs4_handle_exception(server, err, &exception);
3410 }
1da177e4 3411 } while (exception.retry);
05e9cfb4 3412out:
1da177e4
LT		 3413 return err;
3414}
3415
8f70e95f
BS		 3416static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3417 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
3418{
c2190661
TM		 3419 struct rpc_auth_create_args auth_args = {
3420 .pseudoflavor = flavor,
3421 };
8f70e95f 3422 struct rpc_auth *auth;
8f70e95f 3423
c2190661 3424 auth = rpcauth_create(&auth_args, server->client);
9df1336c
AS		 3425 if (IS_ERR(auth))
3426 return -EACCES;
3427 return nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 3428}
3429
9a744ba3
CL		 3430/*
3431 * Retry pseudoroot lookup with various security flavors. We do this when:
3432 *
3433 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
3434 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
3435 *
3436 * Returns zero on success, or a negative NFS4ERR value, or a
3437 * negative errno value.
3438 */
801a16dc 3439static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 3440 struct nfs_fsinfo *info)
1da177e4 3441{
9a744ba3
CL		 3442 /* Per 3530bis 15.33.5 */
3443 static const rpc_authflavor_t flav_array[] = {
3444 RPC_AUTH_GSS_KRB5P,
3445 RPC_AUTH_GSS_KRB5I,
3446 RPC_AUTH_GSS_KRB5,
c4eafe11 3447 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 3448 RPC_AUTH_NULL,
3449 };
3450 int status = -EPERM;
3451 size_t i;
6a1a1e34 3452
4d4b69dd
WAA		 3453 if (server->auth_info.flavor_len > 0) {
3454 /* try each flavor specified by user */
3455 for (i = 0; i < server->auth_info.flavor_len; i++) {
3456 status = nfs4_lookup_root_sec(server, fhandle, info,
3457 server->auth_info.flavors[i]);
3458 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3459 continue;
3460 break;
3461 }
3462 } else {
3463 /* no flavors specified by user, try default list */
3464 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3465 status = nfs4_lookup_root_sec(server, fhandle, info,
3466 flav_array[i]);
3467 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3468 continue;
3469 break;
3470 }
8f70e95f 3471 }
9a744ba3 3472
fb8a5ba8
BS		 3473 /*
3474 * -EACCESS could mean that the user doesn't have correct permissions
3475 * to access the mount. It could also mean that we tried to mount
3476 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
3477 * existing mount programs don't handle -EACCES very well so it should
3478 * be mapped to -EPERM instead.
3479 */
3480 if (status == -EACCES)
3481 status = -EPERM;
801a16dc
BS		 3482 return status;
3483}
3484
2ed4b95b
CL		 3485/**
3486 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
3487 * @server: initialized nfs_server handle
3488 * @fhandle: we fill in the pseudo-fs root file handle
3489 * @info: we fill in an FSINFO struct
5e6b1990 3490 * @auth_probe: probe the auth flavours
2ed4b95b
CL		 3491 *
3492 * Returns zero on success, or a negative errno.
801a16dc 3493 */
3028eb2b 3494int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
5e6b1990
TM		 3495 struct nfs_fsinfo *info,
3496 bool auth_probe)
801a16dc 3497{
c7757074 3498 int status = 0;
2ed4b95b 3499
c7757074 3500 if (!auth_probe)
5e6b1990 3501 status = nfs4_lookup_root(server, fhandle, info);
c7757074
AP		 3502
3503 if (auth_probe || status == NFS4ERR_WRONGSEC)
698c937b
TM		 3504 status = server->nfs_client->cl_mvops->find_root_sec(server,
3505 fhandle, info);
2ed4b95b 3506
1da177e4
LT		 3507 if (status == 0)
3508 status = nfs4_server_capabilities(server, fhandle);
3509 if (status == 0)
3510 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 3511
c12e87f4 3512 return nfs4_map_errors(status);
1da177e4
LT		 3513}
3514
bae36241
BS		 3515static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3516 struct nfs_fsinfo *info)
3517{
3518 int error;
3519 struct nfs_fattr *fattr = info->fattr;
1775fd3e 3520 struct nfs4_label *label = NULL;
bae36241
BS		 3521
3522 error = nfs4_server_capabilities(server, mntfh);
3523 if (error < 0) {
3524 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3525 return error;
3526 }
3527
14c43f76
DQ		 3528 label = nfs4_label_alloc(server, GFP_KERNEL);
3529 if (IS_ERR(label))
3530 return PTR_ERR(label);
3531
1775fd3e 3532 error = nfs4_proc_getattr(server, mntfh, fattr, label);
bae36241
BS		 3533 if (error < 0) {
3534 dprintk("nfs4_get_root: getattr error = %d\n", -error);
14c43f76 3535 goto err_free_label;
bae36241
BS		 3536 }
3537
3538 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3539 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3540 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3541
14c43f76
DQ		 3542err_free_label:
3543 nfs4_label_free(label);
3544
bae36241
BS		 3545 return error;
3546}
3547
6b97fd3d
MN		 3548/*
3549 * Get locations and (maybe) other attributes of a referral.
3550 * Note that we'll actually follow the referral later when
3551 * we detect fsid mismatch in inode revalidation
3552 */
f05d147f
BS		 3553static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3554 const struct qstr *name, struct nfs_fattr *fattr,
3555 struct nfs_fh *fhandle)
6b97fd3d
MN		 3556{
3557 int status = -ENOMEM;
3558 struct page *page = NULL;
3559 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 3560
3561 page = alloc_page(GFP_KERNEL);
3562 if (page == NULL)
3563 goto out;
3564 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3565 if (locations == NULL)
3566 goto out;
3567
f05d147f 3568 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 3569 if (status != 0)
3570 goto out;
519ae255
CL		 3571
3572 /*
3573 * If the fsid didn't change, this is a migration event, not a
3574 * referral. Cause us to drop into the exception handler, which
3575 * will kick off migration recovery.
3576 */
6b97fd3d 3577 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 3578 dprintk("%s: server did not return a different fsid for"
3579 " a referral at %s\n", __func__, name->name);
519ae255 3580 status = -NFS4ERR_MOVED;
6b97fd3d
MN		 3581 goto out;
3582 }
533eb461
AA		 3583 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3584 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 3585
533eb461 3586 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 3587 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 3588 memset(fhandle, 0, sizeof(struct nfs_fh));
3589out:
3590 if (page)
3591 __free_page(page);
5d7ca35a 3592 kfree(locations);
6b97fd3d
MN		 3593 return status;
3594}
3595
1775fd3e
DQ		 3596static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3597 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3598{
3599 struct nfs4_getattr_arg args = {
3600 .fh = fhandle,
3601 .bitmask = server->attr_bitmask,
3602 };
3603 struct nfs4_getattr_res res = {
3604 .fattr = fattr,
1775fd3e 3605 .label = label,
1da177e4
LT		 3606 .server = server,
3607 };
3608 struct rpc_message msg = {
3609 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3610 .rpc_argp = &args,
3611 .rpc_resp = &res,
3612 };
aa9c2669
DQ		 3613
3614 args.bitmask = nfs4_bitmask(server, label);
3615
0e574af1 3616 nfs_fattr_init(fattr);
7c513058 3617 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3618}
3619
1775fd3e
DQ		 3620static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3621 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3622{
3623 struct nfs4_exception exception = { };
3624 int err;
3625 do {
b5f875a9
TM		 3626 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3627 trace_nfs4_getattr(server, fhandle, fattr, err);
3628 err = nfs4_handle_exception(server, err,
1da177e4
LT		 3629 &exception);
3630 } while (exception.retry);
3631 return err;
3632}
3633
3634/*
3635 * The file is not closed if it is opened due to the a request to change
3636 * the size of the file. The open call will not be needed once the
3637 * VFS layer lookup-intents are implemented.
3638 *
3639 * Close is called when the inode is destroyed.
3640 * If we haven't opened the file for O_WRONLY, we
3641 * need to in the size_change case to obtain a stateid.
3642 *
3643 * Got race?
3644 * Because OPEN is always done by name in nfsv4, it is
3645 * possible that we opened a different file by the same
3646 * name. We can recognize this race condition, but we
3647 * can't do anything about it besides returning an error.
3648 *
3649 * This will be fixed with VFS changes (lookup-intent).
3650 */
3651static int
3652nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3653 struct iattr *sattr)
3654{
2b0143b5 3655 struct inode *inode = d_inode(dentry);
659bfcd6 3656 struct rpc_cred *cred = NULL;
29b59f94 3657 struct nfs_open_context *ctx = NULL;
14c43f76 3658 struct nfs4_label *label = NULL;
1da177e4
LT		 3659 int status;
3660
88ac815c
PT		 3661 if (pnfs_ld_layoutret_on_setattr(inode) &&
3662 sattr->ia_valid & ATTR_SIZE &&
3663 sattr->ia_size < i_size_read(inode))
24028672 3664 pnfs_commit_and_return_layout(inode);
8a1636c4 3665
0e574af1 3666 nfs_fattr_init(fattr);
1da177e4 3667
2669940d
AA		 3668 /* Deal with open(O_TRUNC) */
3669 if (sattr->ia_valid & ATTR_OPEN)
cc7936f9 3670 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2669940d
AA		 3671
3672 /* Optimization: if the end result is no change, don't RPC */
cc7936f9 3673 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2669940d
AA		 3674 return 0;
3675
d530838b 3676 /* Search for an existing open(O_WRITE) file */
659bfcd6 3677 if (sattr->ia_valid & ATTR_FILE) {
659bfcd6
TM		 3678
3679 ctx = nfs_file_open_context(sattr->ia_file);
29b59f94 3680 if (ctx)
504e5189 3681 cred = ctx->cred;
659bfcd6 3682 }
08e9eac4 3683
14c43f76
DQ		 3684 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3685 if (IS_ERR(label))
3686 return PTR_ERR(label);
3687
29b59f94 3688 status = nfs4_do_setattr(inode, cred, fattr, sattr, ctx, NULL, label);
aa9c2669 3689 if (status == 0) {
f044636d 3690 nfs_setattr_update_inode(inode, sattr, fattr);
aa9c2669
DQ		 3691 nfs_setsecurity(inode, fattr, label);
3692 }
14c43f76 3693 nfs4_label_free(label);
1da177e4
LT		 3694 return status;
3695}
3696
0c2e53f1
TM		 3697static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3698 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3699 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 3700{
0c2e53f1 3701 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 3702 int status;
3703 struct nfs4_lookup_arg args = {
3704 .bitmask = server->attr_bitmask,
0c2e53f1 3705 .dir_fh = NFS_FH(dir),
2b3de441
DH		 3706 .name = name,
3707 };
3708 struct nfs4_lookup_res res = {
3709 .server = server,
3710 .fattr = fattr,
aa9c2669 3711 .label = label,
2b3de441
DH		 3712 .fh = fhandle,
3713 };
3714 struct rpc_message msg = {
3715 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3716 .rpc_argp = &args,
3717 .rpc_resp = &res,
3718 };
3719
aa9c2669
DQ		 3720 args.bitmask = nfs4_bitmask(server, label);
3721
2b3de441
DH		 3722 nfs_fattr_init(fattr);
3723
1da177e4 3724 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 3725 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3726 dprintk("NFS reply lookup: %d\n", status);
3727 return status;
3728}
3729
72de53ec 3730static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 3731{
7ebb9315 3732 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 3733 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 3734 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3735 fattr->nlink = 2;
3736}
3737
72de53ec 3738static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
beffb8fe 3739 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3740 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3741{
3742 struct nfs4_exception exception = { };
72de53ec 3743 struct rpc_clnt *client = *clnt;
1da177e4
LT		 3744 int err;
3745 do {
1775fd3e 3746 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
078ea3df 3747 trace_nfs4_lookup(dir, name, err);
72de53ec 3748 switch (err) {
08ef7bd3 3749 case -NFS4ERR_BADNAME:
72de53ec
BS		 3750 err = -ENOENT;
3751 goto out;
0c2e53f1 3752 case -NFS4ERR_MOVED:
f05d147f 3753 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
c86c90c6
DM		 3754 if (err == -NFS4ERR_MOVED)
3755 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
72de53ec 3756 goto out;
0c2e53f1 3757 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 3758 err = -EPERM;
3759 if (client != *clnt)
3760 goto out;
66b06860 3761 client = nfs4_negotiate_security(client, dir, name);
72de53ec
BS		 3762 if (IS_ERR(client))
3763 return PTR_ERR(client);
3764
3765 exception.retry = 1;
3766 break;
3767 default:
3768 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 3769 }
1da177e4 3770 } while (exception.retry);
72de53ec
BS		 3771
3772out:
3773 if (err == 0)
3774 *clnt = client;
3775 else if (client != *clnt)
3776 rpc_shutdown_client(client);
3777
1da177e4
LT		 3778 return err;
3779}
3780
beffb8fe 3781static int nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1775fd3e
DQ		 3782 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3783 struct nfs4_label *label)
72de53ec
BS		 3784{
3785 int status;
3786 struct rpc_clnt *client = NFS_CLIENT(dir);
3787
1775fd3e 3788 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
72de53ec
BS		 3789 if (client != NFS_CLIENT(dir)) {
3790 rpc_shutdown_client(client);
3791 nfs_fixup_secinfo_attributes(fattr);
3792 }
3793 return status;
3794}
3795
f05d147f 3796struct rpc_clnt *
beffb8fe 3797nfs4_proc_lookup_mountpoint(struct inode *dir, const struct qstr *name,
f05d147f
BS		 3798 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3799{
b72888cb 3800 struct rpc_clnt *client = NFS_CLIENT(dir);
f05d147f 3801 int status;
f05d147f 3802
1775fd3e 3803 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
b72888cb 3804 if (status < 0)
f05d147f 3805 return ERR_PTR(status);
b72888cb 3806 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
f05d147f
BS		 3807}
3808
5b5faaf6
JL		 3809static int _nfs4_proc_lookupp(struct inode *inode,
3810 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3811 struct nfs4_label *label)
3812{
3813 struct rpc_clnt *clnt = NFS_CLIENT(inode);
3814 struct nfs_server *server = NFS_SERVER(inode);
3815 int status;
3816 struct nfs4_lookupp_arg args = {
3817 .bitmask = server->attr_bitmask,
3818 .fh = NFS_FH(inode),
3819 };
3820 struct nfs4_lookupp_res res = {
3821 .server = server,
3822 .fattr = fattr,
3823 .label = label,
3824 .fh = fhandle,
3825 };
3826 struct rpc_message msg = {
3827 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUPP],
3828 .rpc_argp = &args,
3829 .rpc_resp = &res,
3830 };
3831
3832 args.bitmask = nfs4_bitmask(server, label);
3833
3834 nfs_fattr_init(fattr);
3835
3836 dprintk("NFS call lookupp ino=0x%lx\n", inode->i_ino);
3837 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
3838 &res.seq_res, 0);
3839 dprintk("NFS reply lookupp: %d\n", status);
3840 return status;
3841}
3842
3843static int nfs4_proc_lookupp(struct inode *inode, struct nfs_fh *fhandle,
3844 struct nfs_fattr *fattr, struct nfs4_label *label)
3845{
3846 struct nfs4_exception exception = { };
3847 int err;
3848 do {
3849 err = _nfs4_proc_lookupp(inode, fhandle, fattr, label);
3850 trace_nfs4_lookupp(inode, err);
3851 err = nfs4_handle_exception(NFS_SERVER(inode), err,
3852 &exception);
3853 } while (exception.retry);
3854 return err;
3855}
3856
1da177e4
LT		 3857static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3858{
76b32999 3859 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3860 struct nfs4_accessargs args = {
3861 .fh = NFS_FH(inode),
a4980e78 3862 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 3863 };
3864 struct nfs4_accessres res = {
3865 .server = server,
1da177e4 3866 };
1da177e4
LT		 3867 struct rpc_message msg = {
3868 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3869 .rpc_argp = &args,
3870 .rpc_resp = &res,
3871 .rpc_cred = entry->cred,
3872 };
3873 int mode = entry->mask;
aa9c2669 3874 int status = 0;
1da177e4
LT		 3875
3876 /*
3877 * Determine which access bits we want to ask for...
3878 */
3879 if (mode & MAY_READ)
3880 args.access |= NFS4_ACCESS_READ;
3881 if (S_ISDIR(inode->i_mode)) {
3882 if (mode & MAY_WRITE)
3883 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3884 if (mode & MAY_EXEC)
3885 args.access |= NFS4_ACCESS_LOOKUP;
3886 } else {
3887 if (mode & MAY_WRITE)
3888 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3889 if (mode & MAY_EXEC)
3890 args.access |= NFS4_ACCESS_EXECUTE;
3891 }
c407d41a
TM		 3892
3893 res.fattr = nfs_alloc_fattr();
3894 if (res.fattr == NULL)
3895 return -ENOMEM;
3896
7c513058 3897 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3898 if (!status) {
6168f62c 3899 nfs_access_set_mask(entry, res.access);
c407d41a 3900 nfs_refresh_inode(inode, res.fattr);
1da177e4 3901 }
c407d41a 3902 nfs_free_fattr(res.fattr);
1da177e4
LT		 3903 return status;
3904}
3905
3906static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3907{
3908 struct nfs4_exception exception = { };
3909 int err;
3910 do {
c1578b76
TM		 3911 err = _nfs4_proc_access(inode, entry);
3912 trace_nfs4_access(inode, err);
3913 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3914 &exception);
3915 } while (exception.retry);
3916 return err;
3917}
3918
3919/*
3920 * TODO: For the time being, we don't try to get any attributes
3921 * along with any of the zero-copy operations READ, READDIR,
3922 * READLINK, WRITE.
3923 *
3924 * In the case of the first three, we want to put the GETATTR
3925 * after the read-type operation -- this is because it is hard
3926 * to predict the length of a GETATTR response in v4, and thus
3927 * align the READ data correctly. This means that the GETATTR
3928 * may end up partially falling into the page cache, and we should
3929 * shift it into the 'tail' of the xdr_buf before processing.
3930 * To do this efficiently, we need to know the total length
3931 * of data received, which doesn't seem to be available outside
3932 * of the RPC layer.
3933 *
3934 * In the case of WRITE, we also want to put the GETATTR after
3935 * the operation -- in this case because we want to make sure
140150db 3936 * we get the post-operation mtime and size.
1da177e4
LT		 3937 *
3938 * Both of these changes to the XDR layer would in fact be quite
3939 * minor, but I decided to leave them for a subsequent patch.
3940 */
3941static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3942 unsigned int pgbase, unsigned int pglen)
3943{
3944 struct nfs4_readlink args = {
3945 .fh = NFS_FH(inode),
3946 .pgbase = pgbase,
3947 .pglen = pglen,
3948 .pages = &page,
3949 };
f50c7000 3950 struct nfs4_readlink_res res;
1da177e4
LT		 3951 struct rpc_message msg = {
3952 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3953 .rpc_argp = &args,
f50c7000 3954 .rpc_resp = &res,
1da177e4
LT		 3955 };
3956
7c513058 3957 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3958}
3959
3960static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3961 unsigned int pgbase, unsigned int pglen)
3962{
3963 struct nfs4_exception exception = { };
3964 int err;
3965 do {
c1578b76
TM		 3966 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3967 trace_nfs4_readlink(inode, err);
3968 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3969 &exception);
3970 } while (exception.retry);
3971 return err;
3972}
3973
1da177e4 3974/*
8867fe58 3975 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3976 */
1da177e4
LT		 3977static int
3978nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3979 int flags)
1da177e4 3980{
dff25ddb 3981 struct nfs_server *server = NFS_SERVER(dir);
aa9c2669 3982 struct nfs4_label l, *ilabel = NULL;
8867fe58 3983 struct nfs_open_context *ctx;
1da177e4 3984 struct nfs4_state *state;
1da177e4
LT		 3985 int status = 0;
3986
532d4def 3987 ctx = alloc_nfs_open_context(dentry, FMODE_READ, NULL);
8867fe58
MS		 3988 if (IS_ERR(ctx))
3989 return PTR_ERR(ctx);
3990
aa9c2669
DQ		 3991 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3992
dff25ddb
AG		 3993 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
3994 sattr->ia_mode &= ~current_umask();
c5c3fb5f 3995 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, NULL);
1da177e4
LT		 3996 if (IS_ERR(state)) {
3997 status = PTR_ERR(state);
c0204fd2 3998 goto out;
1da177e4 3999 }
1da177e4 4000out:
aa9c2669 4001 nfs4_label_release_security(ilabel);
8867fe58 4002 put_nfs_open_context(ctx);
1da177e4
LT		 4003 return status;
4004}
4005
beffb8fe 4006static int _nfs4_proc_remove(struct inode *dir, const struct qstr *name)
1da177e4 4007{
16e42959 4008 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 4009 struct nfs_removeargs args = {
1da177e4 4010 .fh = NFS_FH(dir),
26fe5750 4011 .name = *name,
16e42959 4012 };
4fdc17b2 4013 struct nfs_removeres res = {
16e42959 4014 .server = server,
1da177e4 4015 };
1da177e4 4016 struct rpc_message msg = {
4fdc17b2
TM		 4017 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
4018 .rpc_argp = &args,
4019 .rpc_resp = &res,
1da177e4 4020 };
d3129ef6 4021 unsigned long timestamp = jiffies;
778d2817 4022 int status;
1da177e4 4023
7c513058 4024 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 4025 if (status == 0)
d3129ef6 4026 update_changeattr(dir, &res.cinfo, timestamp);
1da177e4
LT		 4027 return status;
4028}
4029
beffb8fe 4030static int nfs4_proc_remove(struct inode *dir, const struct qstr *name)
1da177e4
LT		 4031{
4032 struct nfs4_exception exception = { };
4033 int err;
4034 do {
078ea3df
TM		 4035 err = _nfs4_proc_remove(dir, name);
4036 trace_nfs4_remove(dir, name, err);
4037 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4038 &exception);
4039 } while (exception.retry);
4040 return err;
4041}
4042
e4eff1a6 4043static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 4044{
e4eff1a6
TM		 4045 struct nfs_server *server = NFS_SERVER(dir);
4046 struct nfs_removeargs *args = msg->rpc_argp;
4047 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 4048
e4eff1a6 4049 res->server = server;
1da177e4 4050 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
a9c92d6b 4051 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
aa9c2669
DQ		 4052
4053 nfs_fattr_init(res->dir_attr);
1da177e4
LT		 4054}
4055
34e137cc
BS		 4056static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
4057{
42e1cca7 4058 nfs4_setup_sequence(NFS_SB(data->dentry->d_sb)->nfs_client,
d9afbd1b
TM		 4059 &data->args.seq_args,
4060 &data->res.seq_res,
4061 task);
1da177e4
LT		 4062}
4063
e4eff1a6 4064static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 4065{
078ea3df
TM		 4066 struct nfs_unlinkdata *data = task->tk_calldata;
4067 struct nfs_removeres *res = &data->res;
e4eff1a6 4068
14516c3a
TM		 4069 if (!nfs4_sequence_done(task, &res->seq_res))
4070 return 0;
8478eaa1
N		 4071 if (nfs4_async_handle_error(task, res->server, NULL,
4072 &data->timeout) == -EAGAIN)
e4eff1a6 4073 return 0;
c40d52fe 4074 if (task->tk_status == 0)
d3129ef6 4075 update_changeattr(dir, &res->cinfo, res->dir_attr->time_start);
e4eff1a6 4076 return 1;
1da177e4
LT		 4077}
4078
d3d4152a
JL		 4079static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
4080{
4081 struct nfs_server *server = NFS_SERVER(dir);
4082 struct nfs_renameargs *arg = msg->rpc_argp;
4083 struct nfs_renameres *res = msg->rpc_resp;
4084
4085 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 4086 res->server = server;
a9c92d6b 4087 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 4088}
4089
c6bfa1a1
BS		 4090static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
4091{
42e1cca7 4092 nfs4_setup_sequence(NFS_SERVER(data->old_dir)->nfs_client,
d9afbd1b
TM		 4093 &data->args.seq_args,
4094 &data->res.seq_res,
4095 task);
d3d4152a
JL		 4096}
4097
4098static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
4099 struct inode *new_dir)
4100{
fbc6f7c2
TM		 4101 struct nfs_renamedata *data = task->tk_calldata;
4102 struct nfs_renameres *res = &data->res;
d3d4152a
JL		 4103
4104 if (!nfs4_sequence_done(task, &res->seq_res))
4105 return 0;
8478eaa1 4106 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
d3d4152a
JL		 4107 return 0;
4108
c733c49c 4109 if (task->tk_status == 0) {
d3129ef6 4110 update_changeattr(old_dir, &res->old_cinfo, res->old_fattr->time_start);
c733c49c 4111 if (new_dir != old_dir)
d3129ef6 4112 update_changeattr(new_dir, &res->new_cinfo, res->new_fattr->time_start);
c733c49c 4113 }
d3d4152a
JL		 4114 return 1;
4115}
4116
beffb8fe 4117static int _nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name)
1da177e4 4118{
91ba2eee 4119 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 4120 struct nfs4_link_arg arg = {
4121 .fh = NFS_FH(inode),
4122 .dir_fh = NFS_FH(dir),
4123 .name = name,
91ba2eee
TM		 4124 .bitmask = server->attr_bitmask,
4125 };
91ba2eee
TM		 4126 struct nfs4_link_res res = {
4127 .server = server,
1775fd3e 4128 .label = NULL,
1da177e4 4129 };
1da177e4
LT		 4130 struct rpc_message msg = {
4131 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
4132 .rpc_argp = &arg,
91ba2eee 4133 .rpc_resp = &res,
1da177e4 4134 };
136f2627
TM		 4135 int status = -ENOMEM;
4136
4137 res.fattr = nfs_alloc_fattr();
778d2817 4138 if (res.fattr == NULL)
136f2627 4139 goto out;
1da177e4 4140
14c43f76
DQ		 4141 res.label = nfs4_label_alloc(server, GFP_KERNEL);
4142 if (IS_ERR(res.label)) {
4143 status = PTR_ERR(res.label);
4144 goto out;
4145 }
aa9c2669 4146 arg.bitmask = nfs4_bitmask(server, res.label);
14c43f76 4147
7c513058 4148 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee 4149 if (!status) {
d3129ef6 4150 update_changeattr(dir, &res.cinfo, res.fattr->time_start);
aa9c2669
DQ		 4151 status = nfs_post_op_update_inode(inode, res.fattr);
4152 if (!status)
4153 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 4154 }
14c43f76
DQ		 4155
4156
4157 nfs4_label_free(res.label);
4158
136f2627 4159out:
136f2627 4160 nfs_free_fattr(res.fattr);
1da177e4
LT		 4161 return status;
4162}
4163
beffb8fe 4164static int nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name)
1da177e4
LT		 4165{
4166 struct nfs4_exception exception = { };
4167 int err;
4168 do {
4169 err = nfs4_handle_exception(NFS_SERVER(inode),
4170 _nfs4_proc_link(inode, dir, name),
4171 &exception);
4172 } while (exception.retry);
4173 return err;
4174}
4175
57dc9a57
TM		 4176struct nfs4_createdata {
4177 struct rpc_message msg;
4178 struct nfs4_create_arg arg;
4179 struct nfs4_create_res res;
4180 struct nfs_fh fh;
4181 struct nfs_fattr fattr;
1775fd3e 4182 struct nfs4_label *label;
57dc9a57
TM		 4183};
4184
4185static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
beffb8fe 4186 const struct qstr *name, struct iattr *sattr, u32 ftype)
57dc9a57
TM		 4187{
4188 struct nfs4_createdata *data;
4189
4190 data = kzalloc(sizeof(*data), GFP_KERNEL);
4191 if (data != NULL) {
4192 struct nfs_server *server = NFS_SERVER(dir);
4193
14c43f76
DQ		 4194 data->label = nfs4_label_alloc(server, GFP_KERNEL);
4195 if (IS_ERR(data->label))
4196 goto out_free;
4197
57dc9a57
TM		 4198 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
4199 data->msg.rpc_argp = &data->arg;
4200 data->msg.rpc_resp = &data->res;
4201 data->arg.dir_fh = NFS_FH(dir);
4202 data->arg.server = server;
4203 data->arg.name = name;
4204 data->arg.attrs = sattr;
4205 data->arg.ftype = ftype;
aa9c2669 4206 data->arg.bitmask = nfs4_bitmask(server, data->label);
dff25ddb 4207 data->arg.umask = current_umask();
57dc9a57
TM		 4208 data->res.server = server;
4209 data->res.fh = &data->fh;
4210 data->res.fattr = &data->fattr;
1775fd3e 4211 data->res.label = data->label;
57dc9a57 4212 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 4213 }
4214 return data;
14c43f76
DQ		 4215out_free:
4216 kfree(data);
4217 return NULL;
57dc9a57
TM		 4218}
4219
4220static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
4221{
7c513058 4222 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 4223 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57 4224 if (status == 0) {
d3129ef6
TM		 4225 update_changeattr(dir, &data->res.dir_cinfo,
4226 data->res.fattr->time_start);
1775fd3e 4227 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 4228 }
4229 return status;
4230}
4231
4232static void nfs4_free_createdata(struct nfs4_createdata *data)
4233{
14c43f76 4234 nfs4_label_free(data->label);
57dc9a57
TM		 4235 kfree(data);
4236}
4237
4f390c15 4238static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 4239 struct page *page, unsigned int len, struct iattr *sattr,
4240 struct nfs4_label *label)
1da177e4 4241{
57dc9a57
TM		 4242 struct nfs4_createdata *data;
4243 int status = -ENAMETOOLONG;
1da177e4 4244
94a6d753 4245 if (len > NFS4_MAXPATHLEN)
57dc9a57 4246 goto out;
4f390c15 4247
57dc9a57
TM		 4248 status = -ENOMEM;
4249 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
4250 if (data == NULL)
4251 goto out;
4252
4253 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
4254 data->arg.u.symlink.pages = &page;
4255 data->arg.u.symlink.len = len;
1775fd3e 4256 data->arg.label = label;
1da177e4 4257
57dc9a57
TM		 4258 status = nfs4_do_create(dir, dentry, data);
4259
4260 nfs4_free_createdata(data);
4261out:
1da177e4
LT		 4262 return status;
4263}
4264
4f390c15 4265static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 4266 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 4267{
4268 struct nfs4_exception exception = { };
aa9c2669 4269 struct nfs4_label l, *label = NULL;
1da177e4 4270 int err;
aa9c2669
DQ		 4271
4272 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4273
1da177e4 4274 do {
078ea3df
TM		 4275 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
4276 trace_nfs4_symlink(dir, &dentry->d_name, err);
4277 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4278 &exception);
4279 } while (exception.retry);
aa9c2669
DQ		 4280
4281 nfs4_label_release_security(label);
1da177e4
LT		 4282 return err;
4283}
4284
4285static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 4286 struct iattr *sattr, struct nfs4_label *label)
1da177e4 4287{
57dc9a57
TM		 4288 struct nfs4_createdata *data;
4289 int status = -ENOMEM;
1da177e4 4290
57dc9a57
TM		 4291 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
4292 if (data == NULL)
4293 goto out;
4294
1775fd3e 4295 data->arg.label = label;
57dc9a57
TM		 4296 status = nfs4_do_create(dir, dentry, data);
4297
4298 nfs4_free_createdata(data);
4299out:
1da177e4
LT		 4300 return status;
4301}
4302
4303static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
4304 struct iattr *sattr)
4305{
dff25ddb 4306 struct nfs_server *server = NFS_SERVER(dir);
1da177e4 4307 struct nfs4_exception exception = { };
aa9c2669 4308 struct nfs4_label l, *label = NULL;
1da177e4 4309 int err;
a8a5da99 4310
aa9c2669
DQ		 4311 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4312
dff25ddb
AG		 4313 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
4314 sattr->ia_mode &= ~current_umask();
1da177e4 4315 do {
078ea3df
TM		 4316 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
4317 trace_nfs4_mkdir(dir, &dentry->d_name, err);
4318 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4319 &exception);
4320 } while (exception.retry);
aa9c2669
DQ		 4321 nfs4_label_release_security(label);
4322
1da177e4
LT		 4323 return err;
4324}
4325
4326static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
a7a3b1e9 4327 u64 cookie, struct page **pages, unsigned int count, bool plus)
1da177e4 4328{
2b0143b5 4329 struct inode *dir = d_inode(dentry);
1da177e4
LT		 4330 struct nfs4_readdir_arg args = {
4331 .fh = NFS_FH(dir),
56e4ebf8 4332 .pages = pages,
1da177e4
LT		 4333 .pgbase = 0,
4334 .count = count,
2b0143b5 4335 .bitmask = NFS_SERVER(d_inode(dentry))->attr_bitmask,
82f2e547 4336 .plus = plus,
1da177e4
LT		 4337 };
4338 struct nfs4_readdir_res res;
4339 struct rpc_message msg = {
4340 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
4341 .rpc_argp = &args,
4342 .rpc_resp = &res,
4343 .rpc_cred = cred,
4344 };
4345 int status;
4346
6de1472f
AV		 4347 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
4348 dentry,
eadf4598 4349 (unsigned long long)cookie);
c3f52af3 4350 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 4351 res.pgbase = args.pgbase;
7c513058 4352 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 4353 if (status >= 0) {
c3f52af3 4354 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 4355 status += args.pgbase;
4356 }
c4812998
TM		 4357
4358 nfs_invalidate_atime(dir);
4359
3110ff80 4360 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 4361 return status;
4362}
4363
4364static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
a7a3b1e9 4365 u64 cookie, struct page **pages, unsigned int count, bool plus)
1da177e4
LT		 4366{
4367 struct nfs4_exception exception = { };
4368 int err;
4369 do {
c1578b76
TM		 4370 err = _nfs4_proc_readdir(dentry, cred, cookie,
4371 pages, count, plus);
2b0143b5
DH		 4372 trace_nfs4_readdir(d_inode(dentry), err);
4373 err = nfs4_handle_exception(NFS_SERVER(d_inode(dentry)), err,
1da177e4
LT		 4374 &exception);
4375 } while (exception.retry);
4376 return err;
4377}
4378
4379static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 4380 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 4381{
57dc9a57
TM		 4382 struct nfs4_createdata *data;
4383 int mode = sattr->ia_mode;
4384 int status = -ENOMEM;
1da177e4 4385
57dc9a57
TM		 4386 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
4387 if (data == NULL)
4388 goto out;
4389
1da177e4 4390 if (S_ISFIFO(mode))
57dc9a57 4391 data->arg.ftype = NF4FIFO;
1da177e4 4392 else if (S_ISBLK(mode)) {
57dc9a57
TM		 4393 data->arg.ftype = NF4BLK;
4394 data->arg.u.device.specdata1 = MAJOR(rdev);
4395 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 4396 }
4397 else if (S_ISCHR(mode)) {
57dc9a57
TM		 4398 data->arg.ftype = NF4CHR;
4399 data->arg.u.device.specdata1 = MAJOR(rdev);
4400 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 4401 } else if (!S_ISSOCK(mode)) {
4402 status = -EINVAL;
4403 goto out_free;
1da177e4 4404 }
1775fd3e 4405
aa9c2669 4406 data->arg.label = label;
57dc9a57 4407 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 4408out_free:
57dc9a57
TM		 4409 nfs4_free_createdata(data);
4410out:
1da177e4
LT		 4411 return status;
4412}
4413
4414static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
4415 struct iattr *sattr, dev_t rdev)
4416{
dff25ddb 4417 struct nfs_server *server = NFS_SERVER(dir);
1da177e4 4418 struct nfs4_exception exception = { };
aa9c2669 4419 struct nfs4_label l, *label = NULL;
1da177e4 4420 int err;
a8a5da99 4421
aa9c2669
DQ		 4422 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4423
dff25ddb
AG		 4424 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
4425 sattr->ia_mode &= ~current_umask();
1da177e4 4426 do {
078ea3df
TM		 4427 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
4428 trace_nfs4_mknod(dir, &dentry->d_name, err);
4429 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4430 &exception);
4431 } while (exception.retry);
aa9c2669
DQ		 4432
4433 nfs4_label_release_security(label);
4434
1da177e4
LT		 4435 return err;
4436}
4437
4438static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
4439 struct nfs_fsstat *fsstat)
4440{
4441 struct nfs4_statfs_arg args = {
4442 .fh = fhandle,
4443 .bitmask = server->attr_bitmask,
4444 };
24ad148a
BH		 4445 struct nfs4_statfs_res res = {
4446 .fsstat = fsstat,
4447 };
1da177e4
LT		 4448 struct rpc_message msg = {
4449 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
4450 .rpc_argp = &args,
24ad148a 4451 .rpc_resp = &res,
1da177e4
LT		 4452 };
4453
0e574af1 4454 nfs_fattr_init(fsstat->fattr);
7c513058 4455 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4456}
4457
4458static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
4459{
4460 struct nfs4_exception exception = { };
4461 int err;
4462 do {
4463 err = nfs4_handle_exception(server,
4464 _nfs4_proc_statfs(server, fhandle, fsstat),
4465 &exception);
4466 } while (exception.retry);
4467 return err;
4468}
4469
4470static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
4471 struct nfs_fsinfo *fsinfo)
4472{
4473 struct nfs4_fsinfo_arg args = {
4474 .fh = fhandle,
4475 .bitmask = server->attr_bitmask,
4476 };
3dda5e43
BH		 4477 struct nfs4_fsinfo_res res = {
4478 .fsinfo = fsinfo,
4479 };
1da177e4
LT		 4480 struct rpc_message msg = {
4481 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
4482 .rpc_argp = &args,
3dda5e43 4483 .rpc_resp = &res,
1da177e4
LT		 4484 };
4485
7c513058 4486 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4487}
4488
4489static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4490{
4491 struct nfs4_exception exception = { };
83ca7f5a 4492 unsigned long now = jiffies;
1da177e4
LT		 4493 int err;
4494
4495 do {
83ca7f5a 4496 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
b5f875a9 4497 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
83ca7f5a 4498 if (err == 0) {
fb10fb67
TM		 4499 nfs4_set_lease_period(server->nfs_client,
4500 fsinfo->lease_time * HZ,
4501 now);
83ca7f5a
CL		 4502 break;
4503 }
4504 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 4505 } while (exception.retry);
4506 return err;
4507}
4508
4509static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4510{
e38eb650
BS		 4511 int error;
4512
0e574af1 4513 nfs_fattr_init(fsinfo->fattr);
e38eb650 4514 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 4515 if (error == 0) {
4516 /* block layout checks this! */
4517 server->pnfs_blksize = fsinfo->blksize;
ca440c38 4518 set_pnfs_layoutdriver(server, fhandle, fsinfo);
dc182549 4519 }
e38eb650
BS		 4520
4521 return error;
1da177e4
LT		 4522}
4523
4524static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4525 struct nfs_pathconf *pathconf)
4526{
4527 struct nfs4_pathconf_arg args = {
4528 .fh = fhandle,
4529 .bitmask = server->attr_bitmask,
4530 };
d45b2989
BH		 4531 struct nfs4_pathconf_res res = {
4532 .pathconf = pathconf,
4533 };
1da177e4
LT		 4534 struct rpc_message msg = {
4535 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
4536 .rpc_argp = &args,
d45b2989 4537 .rpc_resp = &res,
1da177e4
LT		 4538 };
4539
4540 /* None of the pathconf attributes are mandatory to implement */
4541 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
4542 memset(pathconf, 0, sizeof(*pathconf));
4543 return 0;
4544 }
4545
0e574af1 4546 nfs_fattr_init(pathconf->fattr);
7c513058 4547 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4548}
4549
4550static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4551 struct nfs_pathconf *pathconf)
4552{
4553 struct nfs4_exception exception = { };
4554 int err;
4555
4556 do {
4557 err = nfs4_handle_exception(server,
4558 _nfs4_proc_pathconf(server, fhandle, pathconf),
4559 &exception);
4560 } while (exception.retry);
4561 return err;
4562}
4563
5521abfd 4564int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 4565 const struct nfs_open_context *ctx,
4566 const struct nfs_lock_context *l_ctx,
4567 fmode_t fmode)
4568{
17393475 4569 return nfs4_select_rw_stateid(ctx->state, fmode, l_ctx, stateid, NULL);
9b206149
TM		 4570}
4571EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4572
5521abfd
TM		 4573static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4574 const struct nfs_open_context *ctx,
4575 const struct nfs_lock_context *l_ctx,
4576 fmode_t fmode)
4577{
4578 nfs4_stateid current_stateid;
4579
e1253be0
TM		 4580 /* If the current stateid represents a lost lock, then exit */
4581 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode) == -EIO)
4582 return true;
5521abfd
TM		 4583 return nfs4_stateid_match(stateid, &current_stateid);
4584}
4585
4586static bool nfs4_error_stateid_expired(int err)
4587{
4588 switch (err) {
4589 case -NFS4ERR_DELEG_REVOKED:
4590 case -NFS4ERR_ADMIN_REVOKED:
4591 case -NFS4ERR_BAD_STATEID:
4592 case -NFS4ERR_STALE_STATEID:
4593 case -NFS4ERR_OLD_STATEID:
4594 case -NFS4ERR_OPENMODE:
4595 case -NFS4ERR_EXPIRED:
4596 return true;
4597 }
4598 return false;
4599}
4600
d45f60c6 4601static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
1da177e4 4602{
d45f60c6 4603 struct nfs_server *server = NFS_SERVER(hdr->inode);
1da177e4 4604
d45f60c6 4605 trace_nfs4_read(hdr, task->tk_status);
9c27869d
TM		 4606 if (task->tk_status < 0) {
4607 struct nfs4_exception exception = {
4608 .inode = hdr->inode,
4609 .state = hdr->args.context->state,
4610 .stateid = &hdr->args.stateid,
4611 };
4612 task->tk_status = nfs4_async_handle_exception(task,
4613 server, task->tk_status, &exception);
4614 if (exception.retry) {
4615 rpc_restart_call_prepare(task);
4616 return -EAGAIN;
4617 }
1da177e4 4618 }
8850df99 4619
1da177e4 4620 if (task->tk_status > 0)
d45f60c6 4621 renew_lease(server, hdr->timestamp);
ec06c096 4622 return 0;
1da177e4
LT		 4623}
4624
5521abfd 4625static bool nfs4_read_stateid_changed(struct rpc_task *task,
3c6b899c 4626 struct nfs_pgio_args *args)
5521abfd
TM		 4627{
4628
4629 if (!nfs4_error_stateid_expired(task->tk_status) ||
4630 nfs4_stateid_is_current(&args->stateid,
4631 args->context,
4632 args->lock_context,
4633 FMODE_READ))
4634 return false;
4635 rpc_restart_call_prepare(task);
4636 return true;
4637}
4638
d45f60c6 4639static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
cbdabc7f
AA		 4640{
4641
4642 dprintk("--> %s\n", __func__);
4643
d45f60c6 4644 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
cbdabc7f 4645 return -EAGAIN;
d45f60c6 4646 if (nfs4_read_stateid_changed(task, &hdr->args))
5521abfd 4647 return -EAGAIN;
bfc505de
TM		 4648 if (task->tk_status > 0)
4649 nfs_invalidate_atime(hdr->inode);
d45f60c6
WAA		 4650 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4651 nfs4_read_done_cb(task, hdr);
cbdabc7f
AA		 4652}
4653
d45f60c6
WAA		 4654static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
4655 struct rpc_message *msg)
1da177e4 4656{
d45f60c6 4657 hdr->timestamp = jiffies;
ca857cc1
TM		 4658 if (!hdr->pgio_done_cb)
4659 hdr->pgio_done_cb = nfs4_read_done_cb;
bdc7f021 4660 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
d45f60c6 4661 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
1da177e4
LT		 4662}
4663
d45f60c6
WAA		 4664static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
4665 struct nfs_pgio_header *hdr)
ea7c3303 4666{
42e1cca7 4667 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode)->nfs_client,
d45f60c6
WAA		 4668 &hdr->args.seq_args,
4669 &hdr->res.seq_res,
9b206149 4670 task))
ef1820f9 4671 return 0;
d45f60c6
WAA		 4672 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
4673 hdr->args.lock_context,
fbe77c30 4674 hdr->rw_mode) == -EIO)
ef1820f9 4675 return -EIO;
d45f60c6 4676 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
ef1820f9
N		 4677 return -EIO;
4678 return 0;
1da177e4
LT		 4679}
4680
d45f60c6
WAA		 4681static int nfs4_write_done_cb(struct rpc_task *task,
4682 struct nfs_pgio_header *hdr)
1da177e4 4683{
d45f60c6 4684 struct inode *inode = hdr->inode;
8478eaa1 4685
d45f60c6 4686 trace_nfs4_write(hdr, task->tk_status);
9c27869d
TM		 4687 if (task->tk_status < 0) {
4688 struct nfs4_exception exception = {
4689 .inode = hdr->inode,
4690 .state = hdr->args.context->state,
4691 .stateid = &hdr->args.stateid,
4692 };
4693 task->tk_status = nfs4_async_handle_exception(task,
4694 NFS_SERVER(inode), task->tk_status,
4695 &exception);
4696 if (exception.retry) {
4697 rpc_restart_call_prepare(task);
4698 return -EAGAIN;
4699 }
1da177e4 4700 }
4f9838c7 4701 if (task->tk_status >= 0) {
d45f60c6 4702 renew_lease(NFS_SERVER(inode), hdr->timestamp);
a08a8cd3 4703 nfs_writeback_update_inode(hdr);
4f9838c7 4704 }
788e7a89 4705 return 0;
1da177e4
LT		 4706}
4707
5521abfd 4708static bool nfs4_write_stateid_changed(struct rpc_task *task,
3c6b899c 4709 struct nfs_pgio_args *args)
5521abfd
TM		 4710{
4711
4712 if (!nfs4_error_stateid_expired(task->tk_status) ||
4713 nfs4_stateid_is_current(&args->stateid,
4714 args->context,
4715 args->lock_context,
4716 FMODE_WRITE))
4717 return false;
4718 rpc_restart_call_prepare(task);
4719 return true;
4720}
4721
d45f60c6 4722static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
b029bc9b 4723{
d45f60c6 4724 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
b029bc9b 4725 return -EAGAIN;
d45f60c6 4726 if (nfs4_write_stateid_changed(task, &hdr->args))
5521abfd 4727 return -EAGAIN;
d45f60c6
WAA		 4728 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4729 nfs4_write_done_cb(task, hdr);
b029bc9b
FI		 4730}
4731
5a37f851 4732static
d45f60c6 4733bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
a69aef14 4734{
5a37f851 4735 /* Don't request attributes for pNFS or O_DIRECT writes */
d45f60c6 4736 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
5a37f851
TM		 4737 return false;
4738 /* Otherwise, request attributes if and only if we don't hold
4739 * a delegation
4740 */
011e2a7f 4741 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 4742}
a69aef14 4743
d45f60c6
WAA		 4744static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
4745 struct rpc_message *msg)
1da177e4 4746{
d45f60c6 4747 struct nfs_server *server = NFS_SERVER(hdr->inode);
bdc7f021 4748
d45f60c6
WAA		 4749 if (!nfs4_write_need_cache_consistency_data(hdr)) {
4750 hdr->args.bitmask = NULL;
4751 hdr->res.fattr = NULL;
7ffd1064 4752 } else
d45f60c6 4753 hdr->args.bitmask = server->cache_consistency_bitmask;
5a37f851 4754
d45f60c6
WAA		 4755 if (!hdr->pgio_done_cb)
4756 hdr->pgio_done_cb = nfs4_write_done_cb;
4757 hdr->res.server = server;
4758 hdr->timestamp = jiffies;
1da177e4 4759
bdc7f021 4760 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
d45f60c6 4761 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
1da177e4
LT		 4762}
4763
0b7c0153 4764static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 4765{
42e1cca7 4766 nfs4_setup_sequence(NFS_SERVER(data->inode)->nfs_client,
d9afbd1b
TM		 4767 &data->args.seq_args,
4768 &data->res.seq_res,
4769 task);
1da177e4
LT		 4770}
4771
0b7c0153 4772static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 4773{
1da177e4 4774 struct inode *inode = data->inode;
14516c3a 4775
cc668ab3 4776 trace_nfs4_commit(data, task->tk_status);
8478eaa1
N		 4777 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4778 NULL, NULL) == -EAGAIN) {
d00c5d43 4779 rpc_restart_call_prepare(task);
788e7a89 4780 return -EAGAIN;
1da177e4 4781 }
788e7a89 4782 return 0;
1da177e4
LT		 4783}
4784
0b7c0153 4785static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 4786{
4787 if (!nfs4_sequence_done(task, &data->res.seq_res))
4788 return -EAGAIN;
0b7c0153 4789 return data->commit_done_cb(task, data);
5f452431
FI		 4790}
4791
0b7c0153 4792static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 4793{
788e7a89 4794 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 4795
0b7c0153
FI		 4796 if (data->commit_done_cb == NULL)
4797 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 4798 data->res.server = server;
bdc7f021 4799 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
a9c92d6b 4800 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4801}
4802
9bc4e3ca
CL		 4803struct nfs4_renewdata {
4804 struct nfs_client *client;
4805 unsigned long timestamp;
4806};
4807
1da177e4
LT		 4808/*
4809 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4810 * standalone procedure for queueing an asynchronous RENEW.
4811 */
9bc4e3ca 4812static void nfs4_renew_release(void *calldata)
dc96aef9 4813{
9bc4e3ca
CL		 4814 struct nfs4_renewdata *data = calldata;
4815 struct nfs_client *clp = data->client;
dc96aef9 4816
0851de06
AB		 4817 if (atomic_read(&clp->cl_count) > 1)
4818 nfs4_schedule_state_renewal(clp);
4819 nfs_put_client(clp);
9bc4e3ca 4820 kfree(data);
dc96aef9
AB		 4821}
4822
9bc4e3ca 4823static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 4824{
9bc4e3ca
CL		 4825 struct nfs4_renewdata *data = calldata;
4826 struct nfs_client *clp = data->client;
4827 unsigned long timestamp = data->timestamp;
1da177e4 4828
c6d01c6f 4829 trace_nfs4_renew_async(clp, task->tk_status);
f8aba1e8
CL		 4830 switch (task->tk_status) {
4831 case 0:
4832 break;
4833 case -NFS4ERR_LEASE_MOVED:
4834 nfs4_schedule_lease_moved_recovery(clp);
4835 break;
4836 default:
95baa25c 4837 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 4838 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4839 return;
4840 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 4841 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 4842 return;
4843 }
4844 nfs4_schedule_path_down_recovery(clp);
1da177e4 4845 }
452e9352 4846 do_renew_lease(clp, timestamp);
1da177e4
LT		 4847}
4848
963d8fe5
TM		 4849static const struct rpc_call_ops nfs4_renew_ops = {
4850 .rpc_call_done = nfs4_renew_done,
dc96aef9 4851 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 4852};
4853
2f60ea6b 4854static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 4855{
4856 struct rpc_message msg = {
4857 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4858 .rpc_argp = clp,
b4454fe1 4859 .rpc_cred = cred,
1da177e4 4860 };
9bc4e3ca 4861 struct nfs4_renewdata *data;
1da177e4 4862
2f60ea6b
TM		 4863 if (renew_flags == 0)
4864 return 0;
0851de06
AB		 4865 if (!atomic_inc_not_zero(&clp->cl_count))
4866 return -EIO;
b569ad34 4867 data = kmalloc(sizeof(*data), GFP_NOFS);
5c737cb2
DW		 4868 if (data == NULL) {
4869 nfs_put_client(clp);
9bc4e3ca 4870 return -ENOMEM;
5c737cb2 4871 }
9bc4e3ca
CL		 4872 data->client = clp;
4873 data->timestamp = jiffies;
bc7a05ca 4874 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 4875 &nfs4_renew_ops, data);
1da177e4
LT		 4876}
4877
8534d4ec 4878static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 4879{
4880 struct rpc_message msg = {
4881 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4882 .rpc_argp = clp,
b4454fe1 4883 .rpc_cred = cred,
1da177e4
LT		 4884 };
4885 unsigned long now = jiffies;
4886 int status;
4887
bc7a05ca 4888 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4889 if (status < 0)
4890 return status;
452e9352 4891 do_renew_lease(clp, now);
1da177e4
LT		 4892 return 0;
4893}
4894
aa1870af
BF		 4895static inline int nfs4_server_supports_acls(struct nfs_server *server)
4896{
7dd7d959 4897 return server->caps & NFS_CAP_ACLS;
aa1870af
BF		 4898}
4899
21f498c2
TM		 4900/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4901 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 4902 * the stack.
4903 */
21f498c2 4904#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 4905
e9e3d724 4906static int buf_to_pages_noslab(const void *buf, size_t buflen,
8fbcf237 4907 struct page **pages)
e9e3d724
NH		 4908{
4909 struct page *newpage, **spages;
4910 int rc = 0;
4911 size_t len;
4912 spages = pages;
4913
4914 do {
21f498c2 4915 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 4916 newpage = alloc_page(GFP_KERNEL);
4917
4918 if (newpage == NULL)
4919 goto unwind;
4920 memcpy(page_address(newpage), buf, len);
d9b67e1e
AS		 4921 buf += len;
4922 buflen -= len;
e9e3d724
NH		 4923 *pages++ = newpage;
4924 rc++;
4925 } while (buflen != 0);
4926
4927 return rc;
4928
4929unwind:
4930 for(; rc > 0; rc--)
4931 __free_page(spages[rc-1]);
4932 return -ENOMEM;
4933}
4934
e50a1c2e
BF		 4935struct nfs4_cached_acl {
4936 int cached;
4937 size_t len;
3e9d4154 4938 char data[0];
e50a1c2e
BF		 4939};
4940
4941static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4942{
4943 struct nfs_inode *nfsi = NFS_I(inode);
4944
4945 spin_lock(&inode->i_lock);
4946 kfree(nfsi->nfs4_acl);
4947 nfsi->nfs4_acl = acl;
4948 spin_unlock(&inode->i_lock);
4949}
4950
4951static void nfs4_zap_acl_attr(struct inode *inode)
4952{
4953 nfs4_set_cached_acl(inode, NULL);
4954}
4955
4956static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4957{
4958 struct nfs_inode *nfsi = NFS_I(inode);
4959 struct nfs4_cached_acl *acl;
4960 int ret = -ENOENT;
4961
4962 spin_lock(&inode->i_lock);
4963 acl = nfsi->nfs4_acl;
4964 if (acl == NULL)
4965 goto out;
4966 if (buf == NULL) /* user is just asking for length */
4967 goto out_len;
4968 if (acl->cached == 0)
4969 goto out;
4970 ret = -ERANGE; /* see getxattr(2) man page */
4971 if (acl->len > buflen)
4972 goto out;
4973 memcpy(buf, acl->data, acl->len);
4974out_len:
4975 ret = acl->len;
4976out:
4977 spin_unlock(&inode->i_lock);
4978 return ret;
4979}
4980
5794d21e 4981static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 4982{
4983 struct nfs4_cached_acl *acl;
b291f1b1 4984 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 4985
1f1ea6c2 4986 if (buflen <= PAGE_SIZE) {
b291f1b1 4987 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 4988 if (acl == NULL)
4989 goto out;
4990 acl->cached = 1;
5794d21e 4991 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 4992 } else {
4993 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4994 if (acl == NULL)
4995 goto out;
4996 acl->cached = 0;
4997 }
4998 acl->len = acl_len;
4999out:
5000 nfs4_set_cached_acl(inode, acl);
5001}
5002
bf118a34
AA		 5003/*
5004 * The getxattr API returns the required buffer length when called with a
5005 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
5006 * the required buf. On a NULL buf, we send a page of data to the server
5007 * guessing that the ACL request can be serviced by a page. If so, we cache
5008 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
5009 * the cache. If not so, we throw away the page, and cache the required
5010 * length. The next getxattr call will then produce another round trip to
5011 * the server, this time with the input buf of the required size.
5012 */
16b4289c 5013static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 5014{
ed92d8c1 5015 struct page *pages[NFS4ACL_MAXPAGES + 1] = {NULL, };
aa1870af
BF		 5016 struct nfs_getaclargs args = {
5017 .fh = NFS_FH(inode),
5018 .acl_pages = pages,
5019 .acl_len = buflen,
5020 };
663c79b3
BH		 5021 struct nfs_getaclres res = {
5022 .acl_len = buflen,
5023 };
aa1870af
BF		 5024 struct rpc_message msg = {
5025 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
5026 .rpc_argp = &args,
663c79b3 5027 .rpc_resp = &res,
aa1870af 5028 };
ed92d8c1 5029 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE) + 1;
21f498c2 5030 int ret = -ENOMEM, i;
aa1870af 5031
21f498c2
TM		 5032 if (npages > ARRAY_SIZE(pages))
5033 return -ERANGE;
5a006899 5034
bf118a34
AA		 5035 for (i = 0; i < npages; i++) {
5036 pages[i] = alloc_page(GFP_KERNEL);
5037 if (!pages[i])
5038 goto out_free;
e50a1c2e 5039 }
5a006899
SP		 5040
5041 /* for decoding across pages */
5042 res.acl_scratch = alloc_page(GFP_KERNEL);
5043 if (!res.acl_scratch)
5044 goto out_free;
5045
bf118a34 5046 args.acl_len = npages * PAGE_SIZE;
5a006899 5047
de040bec 5048 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 5049 __func__, buf, buflen, npages, args.acl_len);
5050 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
5051 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 5052 if (ret)
5053 goto out_free;
bf118a34 5054
1f1ea6c2
TM		 5055 /* Handle the case where the passed-in buffer is too short */
5056 if (res.acl_flags & NFS4_ACL_TRUNC) {
5057 /* Did the user only issue a request for the acl length? */
5058 if (buf == NULL)
5059 goto out_ok;
e50a1c2e 5060 ret = -ERANGE;
1f1ea6c2 5061 goto out_free;
e50a1c2e 5062 }
1f1ea6c2 5063 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 5064 if (buf) {
5065 if (res.acl_len > buflen) {
5066 ret = -ERANGE;
5067 goto out_free;
5068 }
1f1ea6c2 5069 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 5070 }
1f1ea6c2
TM		 5071out_ok:
5072 ret = res.acl_len;
e50a1c2e 5073out_free:
bf118a34
AA		 5074 for (i = 0; i < npages; i++)
5075 if (pages[i])
5076 __free_page(pages[i]);
331818f1
TM		 5077 if (res.acl_scratch)
5078 __free_page(res.acl_scratch);
aa1870af
BF		 5079 return ret;
5080}
5081
16b4289c
TM		 5082static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
5083{
5084 struct nfs4_exception exception = { };
5085 ssize_t ret;
5086 do {
5087 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
c1578b76 5088 trace_nfs4_get_acl(inode, ret);
16b4289c
TM		 5089 if (ret >= 0)
5090 break;
5091 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
5092 } while (exception.retry);
5093 return ret;
5094}
5095
e50a1c2e
BF		 5096static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
5097{
5098 struct nfs_server *server = NFS_SERVER(inode);
5099 int ret;
5100
5101 if (!nfs4_server_supports_acls(server))
5102 return -EOPNOTSUPP;
5103 ret = nfs_revalidate_inode(server, inode);
5104 if (ret < 0)
5105 return ret;
08a22b39
AK		 5106 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
5107 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 5108 ret = nfs4_read_cached_acl(inode, buf, buflen);
5109 if (ret != -ENOENT)
bf118a34
AA		 5110 /* -ENOENT is returned if there is no ACL or if there is an ACL
5111 * but no cached acl data, just the acl length */
e50a1c2e
BF		 5112 return ret;
5113 return nfs4_get_acl_uncached(inode, buf, buflen);
5114}
5115
16b4289c 5116static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 5117{
5118 struct nfs_server *server = NFS_SERVER(inode);
5119 struct page *pages[NFS4ACL_MAXPAGES];
5120 struct nfs_setaclargs arg = {
5121 .fh = NFS_FH(inode),
5122 .acl_pages = pages,
5123 .acl_len = buflen,
5124 };
73c403a9 5125 struct nfs_setaclres res;
4b580ee3
BF		 5126 struct rpc_message msg = {
5127 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
5128 .rpc_argp = &arg,
73c403a9 5129 .rpc_resp = &res,
4b580ee3 5130 };
21f498c2 5131 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 5132 int ret, i;
4b580ee3
BF		 5133
5134 if (!nfs4_server_supports_acls(server))
5135 return -EOPNOTSUPP;
21f498c2
TM		 5136 if (npages > ARRAY_SIZE(pages))
5137 return -ERANGE;
8fbcf237 5138 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages);
e9e3d724
NH		 5139 if (i < 0)
5140 return i;
57ec14c5 5141 nfs4_inode_return_delegation(inode);
7c513058 5142 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 5143
5144 /*
5145 * Free each page after tx, so the only ref left is
5146 * held by the network stack
5147 */
5148 for (; i > 0; i--)
5149 put_page(pages[i-1]);
5150
08a22b39
AK		 5151 /*
5152 * Acl update can result in inode attribute update.
5153 * so mark the attribute cache invalid.
5154 */
5155 spin_lock(&inode->i_lock);
5156 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
5157 spin_unlock(&inode->i_lock);
f41f7418
TM		 5158 nfs_access_zap_cache(inode);
5159 nfs_zap_acl_cache(inode);
4b580ee3
BF		 5160 return ret;
5161}
5162
16b4289c
TM		 5163static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
5164{
5165 struct nfs4_exception exception = { };
5166 int err;
5167 do {
c1578b76
TM		 5168 err = __nfs4_proc_set_acl(inode, buf, buflen);
5169 trace_nfs4_set_acl(inode, err);
5170 err = nfs4_handle_exception(NFS_SERVER(inode), err,
16b4289c
TM		 5171 &exception);
5172 } while (exception.retry);
5173 return err;
5174}
5175
aa9c2669
DQ		 5176#ifdef CONFIG_NFS_V4_SECURITY_LABEL
5177static int _nfs4_get_security_label(struct inode *inode, void *buf,
5178 size_t buflen)
5179{
5180 struct nfs_server *server = NFS_SERVER(inode);
5181 struct nfs_fattr fattr;
5182 struct nfs4_label label = {0, 0, buflen, buf};
5183
5184 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
fcb63a9b 5185 struct nfs4_getattr_arg arg = {
aa9c2669
DQ		 5186 .fh = NFS_FH(inode),
5187 .bitmask = bitmask,
5188 };
5189 struct nfs4_getattr_res res = {
5190 .fattr = &fattr,
5191 .label = &label,
5192 .server = server,
5193 };
5194 struct rpc_message msg = {
5195 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
fcb63a9b 5196 .rpc_argp = &arg,
aa9c2669
DQ		 5197 .rpc_resp = &res,
5198 };
5199 int ret;
5200
5201 nfs_fattr_init(&fattr);
5202
fcb63a9b 5203 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
aa9c2669
DQ		 5204 if (ret)
5205 return ret;
5206 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
5207 return -ENOENT;
5208 if (buflen < label.len)
5209 return -ERANGE;
5210 return 0;
5211}
5212
5213static int nfs4_get_security_label(struct inode *inode, void *buf,
5214 size_t buflen)
5215{
5216 struct nfs4_exception exception = { };
5217 int err;
5218
5219 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
5220 return -EOPNOTSUPP;
5221
5222 do {
c1578b76
TM		 5223 err = _nfs4_get_security_label(inode, buf, buflen);
5224 trace_nfs4_get_security_label(inode, err);
5225 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 5226 &exception);
5227 } while (exception.retry);
5228 return err;
5229}
5230
5231static int _nfs4_do_set_security_label(struct inode *inode,
5232 struct nfs4_label *ilabel,
5233 struct nfs_fattr *fattr,
5234 struct nfs4_label *olabel)
5235{
5236
5237 struct iattr sattr = {0};
5238 struct nfs_server *server = NFS_SERVER(inode);
5239 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
12207f69 5240 struct nfs_setattrargs arg = {
d9b67e1e
AS		 5241 .fh = NFS_FH(inode),
5242 .iap = &sattr,
aa9c2669
DQ		 5243 .server = server,
5244 .bitmask = bitmask,
5245 .label = ilabel,
5246 };
5247 struct nfs_setattrres res = {
5248 .fattr = fattr,
5249 .label = olabel,
5250 .server = server,
5251 };
5252 struct rpc_message msg = {
d9b67e1e
AS		 5253 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
5254 .rpc_argp = &arg,
5255 .rpc_resp = &res,
aa9c2669
DQ		 5256 };
5257 int status;
5258
12207f69 5259 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
aa9c2669 5260
12207f69 5261 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
aa9c2669
DQ		 5262 if (status)
5263 dprintk("%s failed: %d\n", __func__, status);
5264
5265 return status;
5266}
5267
5268static int nfs4_do_set_security_label(struct inode *inode,
5269 struct nfs4_label *ilabel,
5270 struct nfs_fattr *fattr,
5271 struct nfs4_label *olabel)
5272{
5273 struct nfs4_exception exception = { };
5274 int err;
5275
5276 do {
c1578b76
TM		 5277 err = _nfs4_do_set_security_label(inode, ilabel,
5278 fattr, olabel);
5279 trace_nfs4_set_security_label(inode, err);
5280 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 5281 &exception);
5282 } while (exception.retry);
5283 return err;
5284}
5285
5286static int
59301226 5287nfs4_set_security_label(struct inode *inode, const void *buf, size_t buflen)
aa9c2669
DQ		 5288{
5289 struct nfs4_label ilabel, *olabel = NULL;
5290 struct nfs_fattr fattr;
5291 struct rpc_cred *cred;
aa9c2669
DQ		 5292 int status;
5293
5294 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
5295 return -EOPNOTSUPP;
5296
5297 nfs_fattr_init(&fattr);
5298
5299 ilabel.pi = 0;
5300 ilabel.lfs = 0;
5301 ilabel.label = (char *)buf;
5302 ilabel.len = buflen;
5303
5304 cred = rpc_lookup_cred();
5305 if (IS_ERR(cred))
5306 return PTR_ERR(cred);
5307
5308 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
5309 if (IS_ERR(olabel)) {
5310 status = -PTR_ERR(olabel);
5311 goto out;
5312 }
5313
5314 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
5315 if (status == 0)
5316 nfs_setsecurity(inode, &fattr, olabel);
5317
5318 nfs4_label_free(olabel);
5319out:
5320 put_rpccred(cred);
5321 return status;
5322}
5323#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
5324
5325
f092075d
CL		 5326static void nfs4_init_boot_verifier(const struct nfs_client *clp,
5327 nfs4_verifier *bootverf)
cd93710e
CL		 5328{
5329 __be32 verf[2];
5330
2c820d9a
CL		 5331 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
5332 /* An impossible timestamp guarantees this value
5333 * will never match a generated boot time. */
2f86e091
DD		 5334 verf[0] = cpu_to_be32(U32_MAX);
5335 verf[1] = cpu_to_be32(U32_MAX);
2c820d9a 5336 } else {
f092075d 5337 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
2f86e091
DD		 5338 u64 ns = ktime_to_ns(nn->boot_time);
5339
5340 verf[0] = cpu_to_be32(ns >> 32);
5341 verf[1] = cpu_to_be32(ns);
2c820d9a 5342 }
cd93710e
CL		 5343 memcpy(bootverf->data, verf, sizeof(bootverf->data));
5344}
5345
a3192688
JL		 5346static int
5347nfs4_init_nonuniform_client_string(struct nfs_client *clp)
e984a55a 5348{
a3192688
JL		 5349 size_t len;
5350 char *str;
e984a55a 5351
ceb3a16c 5352 if (clp->cl_owner_id != NULL)
a3192688 5353 return 0;
4a3e5779 5354
a3192688 5355 rcu_read_lock();
4a70316c 5356 len = 14 + strlen(clp->cl_ipaddr) + 1 +
a3192688
JL		 5357 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) +
5358 1 +
5359 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO)) +
5360 1;
5361 rcu_read_unlock();
5362
5363 if (len > NFS4_OPAQUE_LIMIT + 1)
5364 return -EINVAL;
5365
5366 /*
5367 * Since this string is allocated at mount time, and held until the
5368 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5369 * about a memory-reclaim deadlock.
5370 */
5371 str = kmalloc(len, GFP_KERNEL);
5372 if (!str)
5373 return -ENOMEM;
ceb3a16c 5374
e984a55a 5375 rcu_read_lock();
f2dd436e 5376 scnprintf(str, len, "Linux NFSv4.0 %s/%s %s",
a3192688
JL		 5377 clp->cl_ipaddr,
5378 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR),
5379 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO));
e984a55a 5380 rcu_read_unlock();
a3192688 5381
a3192688
JL		 5382 clp->cl_owner_id = str;
5383 return 0;
e984a55a
CL		 5384}
5385
873e3851
JL		 5386static int
5387nfs4_init_uniquifier_client_string(struct nfs_client *clp)
5388{
873e3851
JL		 5389 size_t len;
5390 char *str;
5391
5392 len = 10 + 10 + 1 + 10 + 1 +
5393 strlen(nfs4_client_id_uniquifier) + 1 +
5394 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5395
5396 if (len > NFS4_OPAQUE_LIMIT + 1)
5397 return -EINVAL;
5398
5399 /*
5400 * Since this string is allocated at mount time, and held until the
5401 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5402 * about a memory-reclaim deadlock.
5403 */
5404 str = kmalloc(len, GFP_KERNEL);
5405 if (!str)
5406 return -ENOMEM;
5407
f2dd436e 5408 scnprintf(str, len, "Linux NFSv%u.%u %s/%s",
873e3851
JL		 5409 clp->rpc_ops->version, clp->cl_minorversion,
5410 nfs4_client_id_uniquifier,
5411 clp->cl_rpcclient->cl_nodename);
873e3851
JL		 5412 clp->cl_owner_id = str;
5413 return 0;
5414}
5415
5416static int
5417nfs4_init_uniform_client_string(struct nfs_client *clp)
e984a55a 5418{
873e3851
JL		 5419 size_t len;
5420 char *str;
ceb3a16c
TM		 5421
5422 if (clp->cl_owner_id != NULL)
873e3851 5423 return 0;
6f2ea7f2
CL		 5424
5425 if (nfs4_client_id_uniquifier[0] != '\0')
873e3851
JL		 5426 return nfs4_init_uniquifier_client_string(clp);
5427
5428 len = 10 + 10 + 1 + 10 + 1 +
5429 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5430
5431 if (len > NFS4_OPAQUE_LIMIT + 1)
5432 return -EINVAL;
5433
5434 /*
5435 * Since this string is allocated at mount time, and held until the
5436 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5437 * about a memory-reclaim deadlock.
5438 */
5439 str = kmalloc(len, GFP_KERNEL);
5440 if (!str)
5441 return -ENOMEM;
5442
f2dd436e 5443 scnprintf(str, len, "Linux NFSv%u.%u %s",
873e3851
JL		 5444 clp->rpc_ops->version, clp->cl_minorversion,
5445 clp->cl_rpcclient->cl_nodename);
873e3851
JL		 5446 clp->cl_owner_id = str;
5447 return 0;
e984a55a
CL		 5448}
5449
706cb8db
CL		 5450/*
5451 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
5452 * services. Advertise one based on the address family of the
5453 * clientaddr.
5454 */
5455static unsigned int
5456nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
5457{
5458 if (strchr(clp->cl_ipaddr, ':') != NULL)
5459 return scnprintf(buf, len, "tcp6");
5460 else
5461 return scnprintf(buf, len, "tcp");
5462}
5463
f11b2a1c
JL		 5464static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
5465{
5466 struct nfs4_setclientid *sc = calldata;
5467
5468 if (task->tk_status == 0)
5469 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
5470}
5471
5472static const struct rpc_call_ops nfs4_setclientid_ops = {
5473 .rpc_call_done = nfs4_setclientid_done,
5474};
5475
6bbb4ae8
CL		 5476/**
5477 * nfs4_proc_setclientid - Negotiate client ID
5478 * @clp: state data structure
5479 * @program: RPC program for NFSv4 callback service
5480 * @port: IP port number for NFS4 callback service
5481 * @cred: RPC credential to use for this call
5482 * @res: where to place the result
5483 *
5484 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5485 */
bb8b27e5
TM		 5486int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
5487 unsigned short port, struct rpc_cred *cred,
5488 struct nfs4_setclientid_res *res)
1da177e4
LT		 5489{
5490 nfs4_verifier sc_verifier;
5491 struct nfs4_setclientid setclientid = {
5492 .sc_verifier = &sc_verifier,
5493 .sc_prog = program,
3a6bb738 5494 .sc_clnt = clp,
1da177e4
LT		 5495 };
5496 struct rpc_message msg = {
5497 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
5498 .rpc_argp = &setclientid,
bb8b27e5 5499 .rpc_resp = res,
286d7d6a 5500 .rpc_cred = cred,
1da177e4 5501 };
f11b2a1c
JL		 5502 struct rpc_task *task;
5503 struct rpc_task_setup task_setup_data = {
5504 .rpc_client = clp->cl_rpcclient,
5505 .rpc_message = &msg,
5506 .callback_ops = &nfs4_setclientid_ops,
5507 .callback_data = &setclientid,
5508 .flags = RPC_TASK_TIMEOUT,
5509 };
6bbb4ae8 5510 int status;
1da177e4 5511
de734831 5512 /* nfs_client_id4 */
f092075d 5513 nfs4_init_boot_verifier(clp, &sc_verifier);
873e3851
JL		 5514
5515 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
5516 status = nfs4_init_uniform_client_string(clp);
5517 else
a3192688 5518 status = nfs4_init_nonuniform_client_string(clp);
873e3851
JL		 5519
5520 if (status)
5521 goto out;
3a6bb738 5522
de734831 5523 /* cb_client4 */
706cb8db
CL		 5524 setclientid.sc_netid_len =
5525 nfs4_init_callback_netid(clp,
5526 setclientid.sc_netid,
5527 sizeof(setclientid.sc_netid));
de734831 5528 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 5529 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 5530 clp->cl_ipaddr, port >> 8, port & 255);
5531
3a6bb738 5532 dprintk("NFS call setclientid auth=%s, '%s'\n",
6bbb4ae8 5533 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3a6bb738 5534 clp->cl_owner_id);
f11b2a1c
JL		 5535 task = rpc_run_task(&task_setup_data);
5536 if (IS_ERR(task)) {
5537 status = PTR_ERR(task);
5538 goto out;
5539 }
5540 status = task->tk_status;
5541 if (setclientid.sc_cred) {
5542 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
5543 put_rpccred(setclientid.sc_cred);
5544 }
5545 rpc_put_task(task);
5546out:
c6d01c6f 5547 trace_nfs4_setclientid(clp, status);
6bbb4ae8
CL		 5548 dprintk("NFS reply setclientid: %d\n", status);
5549 return status;
1da177e4
LT		 5550}
5551
6bbb4ae8
CL		 5552/**
5553 * nfs4_proc_setclientid_confirm - Confirm client ID
5554 * @clp: state data structure
5555 * @res: result of a previous SETCLIENTID
5556 * @cred: RPC credential to use for this call
5557 *
5558 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5559 */
fd954ae1 5560int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 5561 struct nfs4_setclientid_res *arg,
5562 struct rpc_cred *cred)
1da177e4 5563{
1da177e4
LT		 5564 struct rpc_message msg = {
5565 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 5566 .rpc_argp = arg,
286d7d6a 5567 .rpc_cred = cred,
1da177e4 5568 };
1da177e4
LT		 5569 int status;
5570
6bbb4ae8
CL		 5571 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
5572 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5573 clp->cl_clientid);
1bd714f2 5574 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 5575 trace_nfs4_setclientid_confirm(clp, status);
6bbb4ae8 5576 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 5577 return status;
5578}
5579
fe650407
TM		 5580struct nfs4_delegreturndata {
5581 struct nfs4_delegreturnargs args;
fa178f29 5582 struct nfs4_delegreturnres res;
fe650407
TM		 5583 struct nfs_fh fh;
5584 nfs4_stateid stateid;
26e976a8 5585 unsigned long timestamp;
586f1c39
TM		 5586 struct {
5587 struct nfs4_layoutreturn_args arg;
5588 struct nfs4_layoutreturn_res res;
4d796d75 5589 struct nfs4_xdr_opaque_data ld_private;
586f1c39
TM		 5590 u32 roc_barrier;
5591 bool roc;
5592 } lr;
fa178f29 5593 struct nfs_fattr fattr;
fe650407 5594 int rpc_status;
039b756a 5595 struct inode *inode;
fe650407
TM		 5596};
5597
fe650407
TM		 5598static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
5599{
5600 struct nfs4_delegreturndata *data = calldata;
938e1010 5601
14516c3a
TM		 5602 if (!nfs4_sequence_done(task, &data->res.seq_res))
5603 return;
938e1010 5604
ca8acf8d 5605 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
586f1c39
TM		 5606
5607 /* Handle Layoutreturn errors */
5608 if (data->args.lr_args && task->tk_status != 0) {
5609 switch(data->res.lr_ret) {
5610 default:
5611 data->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
5612 break;
5613 case 0:
5614 data->args.lr_args = NULL;
5615 data->res.lr_res = NULL;
5616 break;
5617 case -NFS4ERR_ADMIN_REVOKED:
5618 case -NFS4ERR_DELEG_REVOKED:
5619 case -NFS4ERR_EXPIRED:
5620 case -NFS4ERR_BAD_STATEID:
5621 case -NFS4ERR_OLD_STATEID:
5622 case -NFS4ERR_UNKNOWN_LAYOUTTYPE:
5623 case -NFS4ERR_WRONG_CRED:
5624 data->args.lr_args = NULL;
5625 data->res.lr_res = NULL;
5626 data->res.lr_ret = 0;
5627 rpc_restart_call_prepare(task);
5628 return;
5629 }
5630 }
5631
79708861 5632 switch (task->tk_status) {
79708861 5633 case 0:
fa178f29 5634 renew_lease(data->res.server, data->timestamp);
23ea44c2 5635 break;
c97cf606
TM		 5636 case -NFS4ERR_ADMIN_REVOKED:
5637 case -NFS4ERR_DELEG_REVOKED:
26d36301
TM		 5638 case -NFS4ERR_EXPIRED:
5639 nfs4_free_revoked_stateid(data->res.server,
5640 data->args.stateid,
5641 task->tk_msg.rpc_cred);
c97cf606
TM		 5642 case -NFS4ERR_BAD_STATEID:
5643 case -NFS4ERR_OLD_STATEID:
5644 case -NFS4ERR_STALE_STATEID:
c97cf606
TM		 5645 task->tk_status = 0;
5646 break;
8ac2b422
TM		 5647 case -NFS4ERR_ACCESS:
5648 if (data->args.bitmask) {
5649 data->args.bitmask = NULL;
5650 data->res.fattr = NULL;
5651 task->tk_status = 0;
5652 rpc_restart_call_prepare(task);
5653 return;
5654 }
79708861 5655 default:
8478eaa1
N		 5656 if (nfs4_async_handle_error(task, data->res.server,
5657 NULL, NULL) == -EAGAIN) {
d00c5d43 5658 rpc_restart_call_prepare(task);
79708861
RL		 5659 return;
5660 }
5661 }
5662 data->rpc_status = task->tk_status;
fe650407
TM		 5663}
5664
5665static void nfs4_delegreturn_release(void *calldata)
5666{
039b756a 5667 struct nfs4_delegreturndata *data = calldata;
ea7c38fe 5668 struct inode *inode = data->inode;
039b756a 5669
ea7c38fe 5670 if (inode) {
586f1c39 5671 if (data->lr.roc)
1c5bd76d
TM		 5672 pnfs_roc_release(&data->lr.arg, &data->lr.res,
5673 data->res.lr_ret);
0bc2c9b4 5674 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
ea7c38fe
TM		 5675 nfs_iput_and_deactive(inode);
5676 }
fe650407
TM		 5677 kfree(calldata);
5678}
5679
938e1010
AA		 5680static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5681{
5682 struct nfs4_delegreturndata *d_data;
5683
5684 d_data = (struct nfs4_delegreturndata *)data;
5685
1c5bd76d 5686 if (!d_data->lr.roc && nfs4_wait_on_layoutreturn(d_data->inode, task))
500d701f
PT		 5687 return;
5688
42e1cca7 5689 nfs4_setup_sequence(d_data->res.server->nfs_client,
d9afbd1b
TM		 5690 &d_data->args.seq_args,
5691 &d_data->res.seq_res,
5692 task);
938e1010 5693}
938e1010 5694
c8d149f3 5695static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010 5696 .rpc_call_prepare = nfs4_delegreturn_prepare,
fe650407
TM		 5697 .rpc_call_done = nfs4_delegreturn_done,
5698 .rpc_release = nfs4_delegreturn_release,
5699};
5700
e6f81075 5701static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 5702{
5703 struct nfs4_delegreturndata *data;
fa178f29 5704 struct nfs_server *server = NFS_SERVER(inode);
fe650407 5705 struct rpc_task *task;
5138fde0
TM		 5706 struct rpc_message msg = {
5707 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5708 .rpc_cred = cred,
5709 };
c970aa85
TM		 5710 struct rpc_task_setup task_setup_data = {
5711 .rpc_client = server->client,
5138fde0 5712 .rpc_message = &msg,
c970aa85
TM		 5713 .callback_ops = &nfs4_delegreturn_ops,
5714 .flags = RPC_TASK_ASYNC,
5715 };
e6f81075 5716 int status = 0;
fe650407 5717
8535b2be 5718 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 5719 if (data == NULL)
5720 return -ENOMEM;
a9c92d6b 5721 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
99ade3c7
AE		 5722
5723 nfs4_state_protect(server->nfs_client,
5724 NFS_SP4_MACH_CRED_CLEANUP,
5725 &task_setup_data.rpc_client, &msg);
5726
fe650407
TM		 5727 data->args.fhandle = &data->fh;
5728 data->args.stateid = &data->stateid;
9e907fec 5729 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 5730 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 5731 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 5732 data->res.fattr = &data->fattr;
5733 data->res.server = server;
586f1c39 5734 data->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
4d796d75 5735 data->lr.arg.ld_private = &data->lr.ld_private;
5138fde0 5736 nfs_fattr_init(data->res.fattr);
26e976a8 5737 data->timestamp = jiffies;
fe650407 5738 data->rpc_status = 0;
53e6fc86 5739 data->lr.roc = pnfs_roc(inode, &data->lr.arg, &data->lr.res, cred);
ea7c38fe 5740 data->inode = nfs_igrab_and_active(inode);
1c5bd76d 5741 if (data->inode) {
1c5bd76d
TM		 5742 if (data->lr.roc) {
5743 data->args.lr_args = &data->lr.arg;
5744 data->res.lr_res = &data->lr.res;
5745 }
53e6fc86
TM		 5746 } else if (data->lr.roc) {
5747 pnfs_roc_release(&data->lr.arg, &data->lr.res, 0);
5748 data->lr.roc = false;
1c5bd76d 5749 }
fe650407 5750
c970aa85 5751 task_setup_data.callback_data = data;
1174dd1f
TM		 5752 msg.rpc_argp = &data->args;
5753 msg.rpc_resp = &data->res;
c970aa85 5754 task = rpc_run_task(&task_setup_data);
7a1218a2 5755 if (IS_ERR(task))
fe650407 5756 return PTR_ERR(task);
e6f81075
TM		 5757 if (!issync)
5758 goto out;
820bf85c 5759 status = rpc_wait_for_completion_task(task);
e6f81075
TM		 5760 if (status != 0)
5761 goto out;
5762 status = data->rpc_status;
e6f81075 5763out:
e6b3c4db 5764 rpc_put_task(task);
fe650407 5765 return status;
1da177e4
LT		 5766}
5767
e6f81075 5768int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 5769{
5770 struct nfs_server *server = NFS_SERVER(inode);
5771 struct nfs4_exception exception = { };
5772 int err;
5773 do {
e6f81075 5774 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
48c9579a 5775 trace_nfs4_delegreturn(inode, stateid, err);
1da177e4
LT		 5776 switch (err) {
5777 case -NFS4ERR_STALE_STATEID:
5778 case -NFS4ERR_EXPIRED:
1da177e4
LT		 5779 case 0:
5780 return 0;
5781 }
5782 err = nfs4_handle_exception(server, err, &exception);
5783 } while (exception.retry);
5784 return err;
5785}
5786
1da177e4
LT		 5787static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5788{
5789 struct inode *inode = state->inode;
5790 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 5791 struct nfs_client *clp = server->nfs_client;
911d1aaf 5792 struct nfs_lockt_args arg = {
1da177e4 5793 .fh = NFS_FH(inode),
911d1aaf 5794 .fl = request,
1da177e4 5795 };
911d1aaf
TM		 5796 struct nfs_lockt_res res = {
5797 .denied = request,
1da177e4
LT		 5798 };
5799 struct rpc_message msg = {
5800 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
d9b67e1e
AS		 5801 .rpc_argp = &arg,
5802 .rpc_resp = &res,
1da177e4
LT		 5803 .rpc_cred = state->owner->so_cred,
5804 };
1da177e4
LT		 5805 struct nfs4_lock_state *lsp;
5806 int status;
5807
911d1aaf 5808 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 5809 status = nfs4_set_lock_state(state, request);
5810 if (status != 0)
5811 goto out;
5812 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 5813 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5814 arg.lock_owner.s_dev = server->s_dev;
7c513058 5815 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 5816 switch (status) {
5817 case 0:
5818 request->fl_type = F_UNLCK;
5819 break;
5820 case -NFS4ERR_DENIED:
5821 status = 0;
1da177e4 5822 }
70cc6487 5823 request->fl_ops->fl_release_private(request);
a6f951dd 5824 request->fl_ops = NULL;
8d0a8a9d 5825out:
1da177e4
LT		 5826 return status;
5827}
5828
5829static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5830{
5831 struct nfs4_exception exception = { };
5832 int err;
5833
5834 do {
d1b748a5
TM		 5835 err = _nfs4_proc_getlk(state, cmd, request);
5836 trace_nfs4_get_lock(request, state, cmd, err);
5837 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
1da177e4
LT		 5838 &exception);
5839 } while (exception.retry);
5840 return err;
5841}
5842
faf5f49c 5843struct nfs4_unlockdata {
911d1aaf
TM		 5844 struct nfs_locku_args arg;
5845 struct nfs_locku_res res;
faf5f49c
TM		 5846 struct nfs4_lock_state *lsp;
5847 struct nfs_open_context *ctx;
f30cb757 5848 struct nfs_lock_context *l_ctx;
911d1aaf 5849 struct file_lock fl;
516285eb 5850 struct nfs_server *server;
26e976a8 5851 unsigned long timestamp;
faf5f49c
TM		 5852};
5853
911d1aaf
TM		 5854static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5855 struct nfs_open_context *ctx,
5856 struct nfs4_lock_state *lsp,
5857 struct nfs_seqid *seqid)
5858{
5859 struct nfs4_unlockdata *p;
5860 struct inode *inode = lsp->ls_state->inode;
5861
8535b2be 5862 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 5863 if (p == NULL)
5864 return NULL;
5865 p->arg.fh = NFS_FH(inode);
5866 p->arg.fl = &p->fl;
5867 p->arg.seqid = seqid;
c1d51931 5868 p->res.seqid = seqid;
911d1aaf
TM		 5869 p->lsp = lsp;
5870 atomic_inc(&lsp->ls_count);
5871 /* Ensure we don't close file until we're done freeing locks! */
5872 p->ctx = get_nfs_open_context(ctx);
f30cb757 5873 p->l_ctx = nfs_get_lock_context(ctx);
911d1aaf
TM		 5874 memcpy(&p->fl, fl, sizeof(p->fl));
5875 p->server = NFS_SERVER(inode);
5876 return p;
5877}
5878
06f814a3 5879static void nfs4_locku_release_calldata(void *data)
faf5f49c 5880{
963d8fe5 5881 struct nfs4_unlockdata *calldata = data;
911d1aaf 5882 nfs_free_seqid(calldata->arg.seqid);
06f814a3 5883 nfs4_put_lock_state(calldata->lsp);
f30cb757 5884 nfs_put_lock_context(calldata->l_ctx);
06f814a3
TM		 5885 put_nfs_open_context(calldata->ctx);
5886 kfree(calldata);
faf5f49c
TM		 5887}
5888
963d8fe5 5889static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 5890{
963d8fe5 5891 struct nfs4_unlockdata *calldata = data;
faf5f49c 5892
14516c3a
TM		 5893 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5894 return;
faf5f49c
TM		 5895 switch (task->tk_status) {
5896 case 0:
26e976a8 5897 renew_lease(calldata->server, calldata->timestamp);
75575ddf 5898 locks_lock_inode_wait(calldata->lsp->ls_state->inode, &calldata->fl);
c69899a1
TM		 5899 if (nfs4_update_lock_stateid(calldata->lsp,
5900 &calldata->res.stateid))
5901 break;
26d36301
TM		 5902 case -NFS4ERR_ADMIN_REVOKED:
5903 case -NFS4ERR_EXPIRED:
5904 nfs4_free_revoked_stateid(calldata->server,
5905 &calldata->arg.stateid,
5906 task->tk_msg.rpc_cred);
9e33bed5
TM		 5907 case -NFS4ERR_BAD_STATEID:
5908 case -NFS4ERR_OLD_STATEID:
faf5f49c 5909 case -NFS4ERR_STALE_STATEID:
425c1d4e
TM		 5910 if (!nfs4_stateid_match(&calldata->arg.stateid,
5911 &calldata->lsp->ls_stateid))
5912 rpc_restart_call_prepare(task);
faf5f49c
TM		 5913 break;
5914 default:
8478eaa1
N		 5915 if (nfs4_async_handle_error(task, calldata->server,
5916 NULL, NULL) == -EAGAIN)
d00c5d43 5917 rpc_restart_call_prepare(task);
faf5f49c 5918 }
2b1bc308 5919 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 5920}
5921
4ce70ada 5922static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 5923{
4ce70ada 5924 struct nfs4_unlockdata *calldata = data;
faf5f49c 5925
f30cb757
BC		 5926 if (test_bit(NFS_CONTEXT_UNLOCK, &calldata->l_ctx->open_context->flags) &&
5927 nfs_async_iocounter_wait(task, calldata->l_ctx))
5928 return;
5929
911d1aaf 5930 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 5931 goto out_wait;
425c1d4e 5932 nfs4_stateid_copy(&calldata->arg.stateid, &calldata->lsp->ls_stateid);
795a88c9 5933 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 5934 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 5935 goto out_no_action;
faf5f49c 5936 }
26e976a8 5937 calldata->timestamp = jiffies;
42e1cca7 5938 if (nfs4_setup_sequence(calldata->server->nfs_client,
a893693c 5939 &calldata->arg.seq_args,
2240a9e2
TM		 5940 &calldata->res.seq_res,
5941 task) != 0)
5942 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 5943 return;
5944out_no_action:
5945 task->tk_action = NULL;
5946out_wait:
5947 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 5948}
5949
963d8fe5 5950static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 5951 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 5952 .rpc_call_done = nfs4_locku_done,
06f814a3 5953 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 5954};
5955
a5d16a4d
TM		 5956static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5957 struct nfs_open_context *ctx,
5958 struct nfs4_lock_state *lsp,
5959 struct nfs_seqid *seqid)
5960{
5961 struct nfs4_unlockdata *data;
5138fde0
TM		 5962 struct rpc_message msg = {
5963 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5964 .rpc_cred = ctx->cred,
5965 };
c970aa85
TM		 5966 struct rpc_task_setup task_setup_data = {
5967 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 5968 .rpc_message = &msg,
c970aa85 5969 .callback_ops = &nfs4_locku_ops,
101070ca 5970 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5971 .flags = RPC_TASK_ASYNC,
5972 };
a5d16a4d 5973
fa940720
WAA		 5974 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5975 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5976
137d6aca
FF		 5977 /* Ensure this is an unlock - when canceling a lock, the
5978 * canceled lock is passed in, and it won't be an unlock.
5979 */
5980 fl->fl_type = F_UNLCK;
f30cb757
BC		 5981 if (fl->fl_flags & FL_CLOSE)
5982 set_bit(NFS_CONTEXT_UNLOCK, &ctx->flags);
137d6aca 5983
a5d16a4d
TM		 5984 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5985 if (data == NULL) {
5986 nfs_free_seqid(seqid);
5987 return ERR_PTR(-ENOMEM);
5988 }
5989
a9c92d6b 5990 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5991 msg.rpc_argp = &data->arg;
5992 msg.rpc_resp = &data->res;
c970aa85
TM		 5993 task_setup_data.callback_data = data;
5994 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 5995}
5996
faf5f49c
TM		 5997static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5998{
65b62a29
TM		 5999 struct inode *inode = state->inode;
6000 struct nfs4_state_owner *sp = state->owner;
6001 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 6002 struct nfs_seqid *seqid;
1da177e4 6003 struct nfs4_lock_state *lsp;
06f814a3 6004 struct rpc_task *task;
b4019c0e 6005 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
06f814a3 6006 int status = 0;
536ff0f8 6007 unsigned char fl_flags = request->fl_flags;
faf5f49c 6008
8d0a8a9d 6009 status = nfs4_set_lock_state(state, request);
9b073574
TM		 6010 /* Unlock _before_ we do the RPC call */
6011 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 6012 /* Exclude nfs_delegation_claim_locks() */
6013 mutex_lock(&sp->so_delegreturn_mutex);
6014 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57 6015 down_read(&nfsi->rwsem);
75575ddf 6016 if (locks_lock_inode_wait(inode, request) == -ENOENT) {
19e03c57 6017 up_read(&nfsi->rwsem);
65b62a29 6018 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 6019 goto out;
19e03c57
TM		 6020 }
6021 up_read(&nfsi->rwsem);
65b62a29 6022 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 6023 if (status != 0)
9b073574
TM		 6024 goto out;
6025 /* Is this a delegated lock? */
8d0a8a9d 6026 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 6027 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
6028 goto out;
b4019c0e
TM		 6029 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid;
6030 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 6031 status = -ENOMEM;
badc76dd 6032 if (IS_ERR(seqid))
9b073574 6033 goto out;
cd3758e3 6034 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 6035 status = PTR_ERR(task);
6036 if (IS_ERR(task))
9b073574 6037 goto out;
820bf85c 6038 status = rpc_wait_for_completion_task(task);
e6b3c4db 6039 rpc_put_task(task);
9b073574 6040out:
536ff0f8 6041 request->fl_flags = fl_flags;
d1b748a5 6042 trace_nfs4_unlock(request, state, F_SETLK, status);
1da177e4
LT		 6043 return status;
6044}
6045
a5d16a4d
TM		 6046struct nfs4_lockdata {
6047 struct nfs_lock_args arg;
6048 struct nfs_lock_res res;
6049 struct nfs4_lock_state *lsp;
6050 struct nfs_open_context *ctx;
6051 struct file_lock fl;
26e976a8 6052 unsigned long timestamp;
a5d16a4d
TM		 6053 int rpc_status;
6054 int cancelled;
66179efe 6055 struct nfs_server *server;
a5d16a4d
TM		 6056};
6057
6058static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 6059 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
6060 gfp_t gfp_mask)
1da177e4 6061{
a5d16a4d
TM		 6062 struct nfs4_lockdata *p;
6063 struct inode *inode = lsp->ls_state->inode;
1da177e4 6064 struct nfs_server *server = NFS_SERVER(inode);
b4019c0e 6065 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
a5d16a4d 6066
8535b2be 6067 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 6068 if (p == NULL)
6069 return NULL;
6070
6071 p->arg.fh = NFS_FH(inode);
6072 p->arg.fl = &p->fl;
8535b2be 6073 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
badc76dd 6074 if (IS_ERR(p->arg.open_seqid))
2f74c0a0 6075 goto out_free;
b4019c0e
TM		 6076 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
6077 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask);
badc76dd 6078 if (IS_ERR(p->arg.lock_seqid))
2f74c0a0 6079 goto out_free_seqid;
7539bbab 6080 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 6081 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 6082 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 6083 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 6084 p->lsp = lsp;
66179efe 6085 p->server = server;
a5d16a4d
TM		 6086 atomic_inc(&lsp->ls_count);
6087 p->ctx = get_nfs_open_context(ctx);
6088 memcpy(&p->fl, fl, sizeof(p->fl));
6089 return p;
2f74c0a0
TM		 6090out_free_seqid:
6091 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 6092out_free:
6093 kfree(p);
6094 return NULL;
6095}
6096
6097static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
6098{
6099 struct nfs4_lockdata *data = calldata;
6100 struct nfs4_state *state = data->lsp->ls_state;
06735b34 6101
3110ff80 6102 dprintk("%s: begin!\n", __func__);
2f74c0a0 6103 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 6104 goto out_wait;
a5d16a4d 6105 /* Do we need to do an open_to_lock_owner? */
6b447539 6106 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) {
8fe72bac 6107 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 6108 goto out_release_lock_seqid;
8fe72bac 6109 }
425c1d4e
TM		 6110 nfs4_stateid_copy(&data->arg.open_stateid,
6111 &state->open_stateid);
a5d16a4d 6112 data->arg.new_lock_owner = 1;
c1d51931 6113 data->res.open_seqid = data->arg.open_seqid;
425c1d4e 6114 } else {
2f74c0a0 6115 data->arg.new_lock_owner = 0;
425c1d4e
TM		 6116 nfs4_stateid_copy(&data->arg.lock_stateid,
6117 &data->lsp->ls_stateid);
6118 }
5d422301
TM		 6119 if (!nfs4_valid_open_stateid(state)) {
6120 data->rpc_status = -EBADF;
6121 task->tk_action = NULL;
6122 goto out_release_open_seqid;
6123 }
26e976a8 6124 data->timestamp = jiffies;
42e1cca7 6125 if (nfs4_setup_sequence(data->server->nfs_client,
035168ab 6126 &data->arg.seq_args,
2240a9e2 6127 &data->res.seq_res,
d9afbd1b 6128 task) == 0)
66179efe 6129 return;
5d422301 6130out_release_open_seqid:
2240a9e2
TM		 6131 nfs_release_seqid(data->arg.open_seqid);
6132out_release_lock_seqid:
6133 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 6134out_wait:
6135 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 6136 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 6137}
6138
a5d16a4d
TM		 6139static void nfs4_lock_done(struct rpc_task *task, void *calldata)
6140{
6141 struct nfs4_lockdata *data = calldata;
39071e6f 6142 struct nfs4_lock_state *lsp = data->lsp;
a5d16a4d 6143
3110ff80 6144 dprintk("%s: begin!\n", __func__);
a5d16a4d 6145
14516c3a
TM		 6146 if (!nfs4_sequence_done(task, &data->res.seq_res))
6147 return;
66179efe 6148
a5d16a4d 6149 data->rpc_status = task->tk_status;
425c1d4e
TM		 6150 switch (task->tk_status) {
6151 case 0:
2b0143b5 6152 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)),
39071e6f 6153 data->timestamp);
c69899a1
TM		 6154 if (data->arg.new_lock) {
6155 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS);
75575ddf 6156 if (locks_lock_inode_wait(lsp->ls_state->inode, &data->fl) < 0) {
c69899a1
TM		 6157 rpc_restart_call_prepare(task);
6158 break;
6159 }
6160 }
39071e6f
TM		 6161 if (data->arg.new_lock_owner != 0) {
6162 nfs_confirm_seqid(&lsp->ls_seqid, 0);
6163 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid);
6164 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
6165 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid))
6166 rpc_restart_call_prepare(task);
425c1d4e
TM		 6167 break;
6168 case -NFS4ERR_BAD_STATEID:
6169 case -NFS4ERR_OLD_STATEID:
6170 case -NFS4ERR_STALE_STATEID:
6171 case -NFS4ERR_EXPIRED:
6172 if (data->arg.new_lock_owner != 0) {
6173 if (!nfs4_stateid_match(&data->arg.open_stateid,
6174 &lsp->ls_state->open_stateid))
6175 rpc_restart_call_prepare(task);
6176 } else if (!nfs4_stateid_match(&data->arg.lock_stateid,
6177 &lsp->ls_stateid))
6178 rpc_restart_call_prepare(task);
a5d16a4d 6179 }
3110ff80 6180 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 6181}
6182
6183static void nfs4_lock_release(void *calldata)
6184{
6185 struct nfs4_lockdata *data = calldata;
6186
3110ff80 6187 dprintk("%s: begin!\n", __func__);
2f74c0a0 6188 nfs_free_seqid(data->arg.open_seqid);
a7a3b1e9 6189 if (data->cancelled) {
a5d16a4d
TM		 6190 struct rpc_task *task;
6191 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
6192 data->arg.lock_seqid);
6193 if (!IS_ERR(task))
bf294b41 6194 rpc_put_task_async(task);
3110ff80 6195 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 6196 } else
6197 nfs_free_seqid(data->arg.lock_seqid);
6198 nfs4_put_lock_state(data->lsp);
6199 put_nfs_open_context(data->ctx);
6200 kfree(data);
3110ff80 6201 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 6202}
6203
6204static const struct rpc_call_ops nfs4_lock_ops = {
6205 .rpc_call_prepare = nfs4_lock_prepare,
6206 .rpc_call_done = nfs4_lock_done,
6207 .rpc_release = nfs4_lock_release,
6208};
6209
2bee72a6
TM		 6210static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
6211{
2bee72a6
TM		 6212 switch (error) {
6213 case -NFS4ERR_ADMIN_REVOKED:
d7f3e4bf 6214 case -NFS4ERR_EXPIRED:
2bee72a6 6215 case -NFS4ERR_BAD_STATEID:
ecac799a 6216 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 6217 if (new_lock_owner != 0 ||
795a88c9 6218 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 6219 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 6220 break;
6221 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 6222 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a 6223 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 6224 };
6225}
6226
afe6c27c 6227static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 6228{
6229 struct nfs4_lockdata *data;
6230 struct rpc_task *task;
5138fde0
TM		 6231 struct rpc_message msg = {
6232 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
6233 .rpc_cred = state->owner->so_cred,
6234 };
c970aa85
TM		 6235 struct rpc_task_setup task_setup_data = {
6236 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 6237 .rpc_message = &msg,
c970aa85 6238 .callback_ops = &nfs4_lock_ops,
101070ca 6239 .workqueue = nfsiod_workqueue,
c970aa85
TM		 6240 .flags = RPC_TASK_ASYNC,
6241 };
a5d16a4d
TM		 6242 int ret;
6243
3110ff80 6244 dprintk("%s: begin!\n", __func__);
cd3758e3 6245 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 6246 fl->fl_u.nfs4_fl.owner,
6247 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 6248 if (data == NULL)
6249 return -ENOMEM;
6250 if (IS_SETLKW(cmd))
6251 data->arg.block = 1;
a9c92d6b 6252 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 6253 msg.rpc_argp = &data->arg;
6254 msg.rpc_resp = &data->res;
c970aa85 6255 task_setup_data.callback_data = data;
8fe72bac
TM		 6256 if (recovery_type > NFS_LOCK_NEW) {
6257 if (recovery_type == NFS_LOCK_RECLAIM)
6258 data->arg.reclaim = NFS_LOCK_RECLAIM;
6259 nfs4_set_sequence_privileged(&data->arg.seq_args);
c69899a1
TM		 6260 } else
6261 data->arg.new_lock = 1;
c970aa85 6262 task = rpc_run_task(&task_setup_data);
7a1218a2 6263 if (IS_ERR(task))
a5d16a4d 6264 return PTR_ERR(task);
820bf85c 6265 ret = rpc_wait_for_completion_task(task);
a5d16a4d
TM		 6266 if (ret == 0) {
6267 ret = data->rpc_status;
2bee72a6
TM		 6268 if (ret)
6269 nfs4_handle_setlk_error(data->server, data->lsp,
6270 data->arg.new_lock_owner, ret);
a5d16a4d 6271 } else
a7a3b1e9 6272 data->cancelled = true;
e6b3c4db 6273 rpc_put_task(task);
3110ff80 6274 dprintk("%s: done, ret = %d!\n", __func__, ret);
48c9579a 6275 trace_nfs4_set_lock(fl, state, &data->res.stateid, cmd, ret);
a5d16a4d 6276 return ret;
1da177e4
LT		 6277}
6278
6279static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
6280{
202b50dc 6281 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 6282 struct nfs4_exception exception = {
6283 .inode = state->inode,
6284 };
202b50dc
TM		 6285 int err;
6286
6287 do {
42a2d13e
TM		 6288 /* Cache the lock if possible... */
6289 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
6290 return 0;
afe6c27c 6291 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 6292 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 6293 break;
6294 nfs4_handle_exception(server, err, &exception);
6295 } while (exception.retry);
6296 return err;
1da177e4
LT		 6297}
6298
6299static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
6300{
202b50dc 6301 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 6302 struct nfs4_exception exception = {
6303 .inode = state->inode,
6304 };
202b50dc
TM		 6305 int err;
6306
6bfc93ef
TM		 6307 err = nfs4_set_lock_state(state, request);
6308 if (err != 0)
6309 return err;
f6de7a39 6310 if (!recover_lost_locks) {
ef1820f9
N		 6311 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
6312 return 0;
6313 }
202b50dc 6314 do {
42a2d13e
TM		 6315 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
6316 return 0;
afe6c27c 6317 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 6318 switch (err) {
6319 default:
6320 goto out;
6321 case -NFS4ERR_GRACE:
6322 case -NFS4ERR_DELAY:
6323 nfs4_handle_exception(server, err, &exception);
6324 err = 0;
6325 }
202b50dc 6326 } while (exception.retry);
a9ed2e25 6327out:
202b50dc 6328 return err;
1da177e4
LT		 6329}
6330
f062eb6c 6331#if defined(CONFIG_NFS_V4_1)
b01dd1d8
BS		 6332static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
6333{
c5896fc8
TM		 6334 struct nfs4_lock_state *lsp;
6335 int status;
b01dd1d8 6336
c5896fc8
TM		 6337 status = nfs4_set_lock_state(state, request);
6338 if (status != 0)
6339 return status;
6340 lsp = request->fl_u.nfs4_fl.owner;
6341 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) ||
6342 test_bit(NFS_LOCK_LOST, &lsp->ls_flags))
6343 return 0;
81b68de4 6344 return nfs4_lock_expired(state, request);
f062eb6c
BS		 6345}
6346#endif
6347
1da177e4
LT		 6348static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6349{
19e03c57 6350 struct nfs_inode *nfsi = NFS_I(state->inode);
11476e9d 6351 struct nfs4_state_owner *sp = state->owner;
01c3b861 6352 unsigned char fl_flags = request->fl_flags;
1ea67dbd 6353 int status;
1da177e4 6354
01c3b861 6355 request->fl_flags |= FL_ACCESS;
75575ddf 6356 status = locks_lock_inode_wait(state->inode, request);
01c3b861
TM		 6357 if (status < 0)
6358 goto out;
11476e9d 6359 mutex_lock(&sp->so_delegreturn_mutex);
19e03c57 6360 down_read(&nfsi->rwsem);
01c3b861 6361 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 6362 /* Yes: cache locks! */
01c3b861 6363 /* ...but avoid races with delegation recall... */
19e03c57 6364 request->fl_flags = fl_flags & ~FL_SLEEP;
75575ddf 6365 status = locks_lock_inode_wait(state->inode, request);
c69899a1 6366 up_read(&nfsi->rwsem);
11476e9d 6367 mutex_unlock(&sp->so_delegreturn_mutex);
9a99af49 6368 goto out;
9a99af49 6369 }
19e03c57 6370 up_read(&nfsi->rwsem);
11476e9d 6371 mutex_unlock(&sp->so_delegreturn_mutex);
c69899a1 6372 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
01c3b861
TM		 6373out:
6374 request->fl_flags = fl_flags;
1da177e4
LT		 6375 return status;
6376}
6377
6378static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6379{
a1d0b5ee
TM		 6380 struct nfs4_exception exception = {
6381 .state = state,
05ffe24f 6382 .inode = state->inode,
a1d0b5ee 6383 };
1da177e4
LT		 6384 int err;
6385
6386 do {
965b5d67
TM		 6387 err = _nfs4_proc_setlk(state, cmd, request);
6388 if (err == -NFS4ERR_DENIED)
6389 err = -EAGAIN;
1da177e4 6390 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 6391 err, &exception);
1da177e4
LT		 6392 } while (exception.retry);
6393 return err;
6394}
6395
d2f3a7f9
JL		 6396#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
6397#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
6398
6399static int
a1d617d8
JL		 6400nfs4_retry_setlk_simple(struct nfs4_state *state, int cmd,
6401 struct file_lock *request)
d2f3a7f9
JL		 6402{
6403 int status = -ERESTARTSYS;
6404 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
6405
6406 while(!signalled()) {
6407 status = nfs4_proc_setlk(state, cmd, request);
6408 if ((status != -EAGAIN) || IS_SETLK(cmd))
6409 break;
6410 freezable_schedule_timeout_interruptible(timeout);
6411 timeout *= 2;
6412 timeout = min_t(unsigned long, NFS4_LOCK_MAXTIMEOUT, timeout);
6413 status = -ERESTARTSYS;
6414 }
6415 return status;
6416}
6417
a1d617d8
JL		 6418#ifdef CONFIG_NFS_V4_1
6419struct nfs4_lock_waiter {
6420 struct task_struct *task;
6421 struct inode *inode;
6422 struct nfs_lowner *owner;
6423 bool notified;
6424};
6425
6426static int
ac6424b9 6427nfs4_wake_lock_waiter(wait_queue_entry_t *wait, unsigned int mode, int flags, void *key)
a1d617d8
JL		 6428{
6429 int ret;
6430 struct cb_notify_lock_args *cbnl = key;
6431 struct nfs4_lock_waiter *waiter = wait->private;
6432 struct nfs_lowner *lowner = &cbnl->cbnl_owner,
6433 *wowner = waiter->owner;
6434
6435 /* Only wake if the callback was for the same owner */
6436 if (lowner->clientid != wowner->clientid ||
6437 lowner->id != wowner->id ||
6438 lowner->s_dev != wowner->s_dev)
6439 return 0;
6440
6441 /* Make sure it's for the right inode */
6442 if (nfs_compare_fh(NFS_FH(waiter->inode), &cbnl->cbnl_fh))
6443 return 0;
6444
6445 waiter->notified = true;
6446
6447 /* override "private" so we can use default_wake_function */
6448 wait->private = waiter->task;
6449 ret = autoremove_wake_function(wait, mode, flags, key);
6450 wait->private = waiter;
6451 return ret;
6452}
6453
6454static int
6455nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6456{
6457 int status = -ERESTARTSYS;
6458 unsigned long flags;
6459 struct nfs4_lock_state *lsp = request->fl_u.nfs4_fl.owner;
6460 struct nfs_server *server = NFS_SERVER(state->inode);
6461 struct nfs_client *clp = server->nfs_client;
6462 wait_queue_head_t *q = &clp->cl_lock_waitq;
6463 struct nfs_lowner owner = { .clientid = clp->cl_clientid,
6464 .id = lsp->ls_seqid.owner_id,
6465 .s_dev = server->s_dev };
6466 struct nfs4_lock_waiter waiter = { .task = current,
6467 .inode = state->inode,
6468 .owner = &owner,
6469 .notified = false };
ac6424b9 6470 wait_queue_entry_t wait;
a1d617d8
JL		 6471
6472 /* Don't bother with waitqueue if we don't expect a callback */
6473 if (!test_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags))
6474 return nfs4_retry_setlk_simple(state, cmd, request);
6475
6476 init_wait(&wait);
6477 wait.private = &waiter;
6478 wait.func = nfs4_wake_lock_waiter;
6479 add_wait_queue(q, &wait);
6480
6481 while(!signalled()) {
6482 status = nfs4_proc_setlk(state, cmd, request);
6483 if ((status != -EAGAIN) || IS_SETLK(cmd))
6484 break;
6485
6486 status = -ERESTARTSYS;
6487 spin_lock_irqsave(&q->lock, flags);
6488 if (waiter.notified) {
6489 spin_unlock_irqrestore(&q->lock, flags);
6490 continue;
6491 }
6492 set_current_state(TASK_INTERRUPTIBLE);
6493 spin_unlock_irqrestore(&q->lock, flags);
6494
6495 freezable_schedule_timeout_interruptible(NFS4_LOCK_MAXTIMEOUT);
6496 }
6497
6498 finish_wait(q, &wait);
6499 return status;
6500}
6501#else /* !CONFIG_NFS_V4_1 */
6502static inline int
6503nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6504{
6505 return nfs4_retry_setlk_simple(state, cmd, request);
6506}
6507#endif
6508
1da177e4
LT		 6509static int
6510nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
6511{
6512 struct nfs_open_context *ctx;
6513 struct nfs4_state *state;
1da177e4
LT		 6514 int status;
6515
6516 /* verify open state */
cd3758e3 6517 ctx = nfs_file_open_context(filp);
1da177e4
LT		 6518 state = ctx->state;
6519
d953126a
TM		 6520 if (IS_GETLK(cmd)) {
6521 if (state != NULL)
6522 return nfs4_proc_getlk(state, F_GETLK, request);
6523 return 0;
6524 }
1da177e4
LT		 6525
6526 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
6527 return -EINVAL;
6528
d953126a
TM		 6529 if (request->fl_type == F_UNLCK) {
6530 if (state != NULL)
6531 return nfs4_proc_unlck(state, cmd, request);
6532 return 0;
6533 }
1da177e4 6534
d953126a
TM		 6535 if (state == NULL)
6536 return -ENOLCK;
1ea67dbd
JL		 6537
6538 if ((request->fl_flags & FL_POSIX) &&
6539 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
6540 return -ENOLCK;
6541
1ea67dbd
JL		 6542 status = nfs4_set_lock_state(state, request);
6543 if (status != 0)
6544 return status;
6545
d2f3a7f9 6546 return nfs4_retry_setlk(state, cmd, request);
1da177e4
LT		 6547}
6548
db4f2e63 6549int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 6550{
6551 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 6552 int err;
6553
6554 err = nfs4_set_lock_state(state, fl);
6555 if (err != 0)
db4f2e63 6556 return err;
4a706fa0 6557 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 6558 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 6559}
6b3b5496 6560
cf470c3e
TM		 6561struct nfs_release_lockowner_data {
6562 struct nfs4_lock_state *lsp;
5ae67c4f 6563 struct nfs_server *server;
cf470c3e 6564 struct nfs_release_lockowner_args args;
b7e63a10 6565 struct nfs_release_lockowner_res res;
60ea6812 6566 unsigned long timestamp;
cf470c3e
TM		 6567};
6568
fbd4bfd1
CL		 6569static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
6570{
6571 struct nfs_release_lockowner_data *data = calldata;
5b53dc88 6572 struct nfs_server *server = data->server;
7981c8a6
AS		 6573 nfs4_setup_sequence(server->nfs_client, &data->args.seq_args,
6574 &data->res.seq_res, task);
5b53dc88 6575 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
60ea6812 6576 data->timestamp = jiffies;
fbd4bfd1
CL		 6577}
6578
6579static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
6580{
6581 struct nfs_release_lockowner_data *data = calldata;
60ea6812
CL		 6582 struct nfs_server *server = data->server;
6583
b7e63a10 6584 nfs40_sequence_done(task, &data->res.seq_res);
60ea6812
CL		 6585
6586 switch (task->tk_status) {
6587 case 0:
6588 renew_lease(server, data->timestamp);
6589 break;
6590 case -NFS4ERR_STALE_CLIENTID:
6591 case -NFS4ERR_EXPIRED:
5b53dc88
KM		 6592 nfs4_schedule_lease_recovery(server->nfs_client);
6593 break;
60ea6812
CL		 6594 case -NFS4ERR_LEASE_MOVED:
6595 case -NFS4ERR_DELAY:
8478eaa1
N		 6596 if (nfs4_async_handle_error(task, server,
6597 NULL, NULL) == -EAGAIN)
60ea6812
CL		 6598 rpc_restart_call_prepare(task);
6599 }
fbd4bfd1
CL		 6600}
6601
d3c7b7cc
TM		 6602static void nfs4_release_lockowner_release(void *calldata)
6603{
cf470c3e 6604 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 6605 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 6606 kfree(calldata);
6607}
6608
17280175 6609static const struct rpc_call_ops nfs4_release_lockowner_ops = {
fbd4bfd1
CL		 6610 .rpc_call_prepare = nfs4_release_lockowner_prepare,
6611 .rpc_call_done = nfs4_release_lockowner_done,
d3c7b7cc
TM		 6612 .rpc_release = nfs4_release_lockowner_release,
6613};
6614
f1cdae87
JL		 6615static void
6616nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 6617{
cf470c3e 6618 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 6619 struct rpc_message msg = {
6620 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
6621 };
6622
6623 if (server->nfs_client->cl_mvops->minor_version != 0)
f1cdae87 6624 return;
fbd4bfd1 6625
cf470c3e
TM		 6626 data = kmalloc(sizeof(*data), GFP_NOFS);
6627 if (!data)
f1cdae87 6628 return;
cf470c3e 6629 data->lsp = lsp;
5ae67c4f 6630 data->server = server;
cf470c3e
TM		 6631 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6632 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
6633 data->args.lock_owner.s_dev = server->s_dev;
fbd4bfd1 6634
cf470c3e 6635 msg.rpc_argp = &data->args;
b7e63a10
TM		 6636 msg.rpc_resp = &data->res;
6637 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
cf470c3e 6638 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
d3c7b7cc
TM		 6639}
6640
aa1870af
BF		 6641#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
6642
d9a82a04 6643static int nfs4_xattr_set_nfs4_acl(const struct xattr_handler *handler,
59301226
AV		 6644 struct dentry *unused, struct inode *inode,
6645 const char *key, const void *buf,
6646 size_t buflen, int flags)
6b3b5496 6647{
59301226 6648 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 6649}
6650
d9a82a04 6651static int nfs4_xattr_get_nfs4_acl(const struct xattr_handler *handler,
b296821a
AV		 6652 struct dentry *unused, struct inode *inode,
6653 const char *key, void *buf, size_t buflen)
6b3b5496 6654{
b296821a 6655 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 6656}
6657
764a5c6b 6658static bool nfs4_xattr_list_nfs4_acl(struct dentry *dentry)
6b3b5496 6659{
764a5c6b 6660 return nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry)));
6b3b5496
BF		 6661}
6662
c9bccef6 6663#ifdef CONFIG_NFS_V4_SECURITY_LABEL
c9bccef6 6664
d9a82a04 6665static int nfs4_xattr_set_nfs4_label(const struct xattr_handler *handler,
59301226
AV		 6666 struct dentry *unused, struct inode *inode,
6667 const char *key, const void *buf,
6668 size_t buflen, int flags)
c9bccef6
DQ		 6669{
6670 if (security_ismaclabel(key))
59301226 6671 return nfs4_set_security_label(inode, buf, buflen);
c9bccef6
DQ		 6672
6673 return -EOPNOTSUPP;
6674}
6675
d9a82a04 6676static int nfs4_xattr_get_nfs4_label(const struct xattr_handler *handler,
b296821a
AV		 6677 struct dentry *unused, struct inode *inode,
6678 const char *key, void *buf, size_t buflen)
c9bccef6
DQ		 6679{
6680 if (security_ismaclabel(key))
b296821a 6681 return nfs4_get_security_label(inode, buf, buflen);
c9bccef6
DQ		 6682 return -EOPNOTSUPP;
6683}
6684
c4803c49
AG		 6685static ssize_t
6686nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
c9bccef6 6687{
c4803c49 6688 int len = 0;
c9bccef6 6689
c4803c49
AG		 6690 if (nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) {
6691 len = security_inode_listsecurity(inode, list, list_len);
6692 if (list_len && len > list_len)
6693 return -ERANGE;
c9bccef6
DQ		 6694 }
6695 return len;
6696}
6697
6698static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
6699 .prefix = XATTR_SECURITY_PREFIX,
c9bccef6
DQ		 6700 .get = nfs4_xattr_get_nfs4_label,
6701 .set = nfs4_xattr_set_nfs4_label,
6702};
c9bccef6 6703
c4803c49
AG		 6704#else
6705
6706static ssize_t
6707nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
6708{
6709 return 0;
6710}
6711
6712#endif
c9bccef6 6713
533eb461
AA		 6714/*
6715 * nfs_fhget will use either the mounted_on_fileid or the fileid
6716 */
69aaaae1
TM		 6717static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6718{
533eb461
AA		 6719 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6720 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6721 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 6722 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 6723 return;
6724
6725 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 6726 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 6727 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6728 fattr->nlink = 2;
6729}
6730
f05d147f
BS		 6731static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6732 const struct qstr *name,
6733 struct nfs4_fs_locations *fs_locations,
6734 struct page *page)
683b57b4
TM		 6735{
6736 struct nfs_server *server = NFS_SERVER(dir);
a09df2ca 6737 u32 bitmask[3] = {
361e624f 6738 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 6739 };
6740 struct nfs4_fs_locations_arg args = {
6741 .dir_fh = NFS_FH(dir),
c228fd3a 6742 .name = name,
683b57b4
TM		 6743 .page = page,
6744 .bitmask = bitmask,
6745 };
22958463
BH		 6746 struct nfs4_fs_locations_res res = {
6747 .fs_locations = fs_locations,
6748 };
683b57b4
TM		 6749 struct rpc_message msg = {
6750 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6751 .rpc_argp = &args,
22958463 6752 .rpc_resp = &res,
683b57b4
TM		 6753 };
6754 int status;
6755
3110ff80 6756 dprintk("%s: start\n", __func__);
533eb461
AA		 6757
6758 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6759 * is not supported */
6760 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6761 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6762 else
6763 bitmask[0] |= FATTR4_WORD0_FILEID;
6764
c228fd3a 6765 nfs_fattr_init(&fs_locations->fattr);
683b57b4 6766 fs_locations->server = server;
830b8e33 6767 fs_locations->nlocations = 0;
f05d147f 6768 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 6769 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 6770 return status;
6771}
6772
f05d147f
BS		 6773int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6774 const struct qstr *name,
6775 struct nfs4_fs_locations *fs_locations,
6776 struct page *page)
db0a9593
BS		 6777{
6778 struct nfs4_exception exception = { };
6779 int err;
6780 do {
078ea3df
TM		 6781 err = _nfs4_proc_fs_locations(client, dir, name,
6782 fs_locations, page);
6783 trace_nfs4_get_fs_locations(dir, name, err);
6784 err = nfs4_handle_exception(NFS_SERVER(dir), err,
db0a9593
BS		 6785 &exception);
6786 } while (exception.retry);
6787 return err;
6788}
6789
b03d735b
CL		 6790/*
6791 * This operation also signals the server that this client is
6792 * performing migration recovery. The server can stop returning
6793 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6794 * appended to this compound to identify the client ID which is
6795 * performing recovery.
6796 */
6797static int _nfs40_proc_get_locations(struct inode *inode,
6798 struct nfs4_fs_locations *locations,
6799 struct page *page, struct rpc_cred *cred)
6800{
6801 struct nfs_server *server = NFS_SERVER(inode);
6802 struct rpc_clnt *clnt = server->client;
6803 u32 bitmask[2] = {
6804 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6805 };
6806 struct nfs4_fs_locations_arg args = {
6807 .clientid = server->nfs_client->cl_clientid,
6808 .fh = NFS_FH(inode),
6809 .page = page,
6810 .bitmask = bitmask,
6811 .migration = 1, /* skip LOOKUP */
6812 .renew = 1, /* append RENEW */
6813 };
6814 struct nfs4_fs_locations_res res = {
6815 .fs_locations = locations,
6816 .migration = 1,
6817 .renew = 1,
6818 };
6819 struct rpc_message msg = {
6820 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6821 .rpc_argp = &args,
6822 .rpc_resp = &res,
6823 .rpc_cred = cred,
6824 };
6825 unsigned long now = jiffies;
6826 int status;
6827
6828 nfs_fattr_init(&locations->fattr);
6829 locations->server = server;
6830 locations->nlocations = 0;
6831
6832 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6833 nfs4_set_sequence_privileged(&args.seq_args);
6834 status = nfs4_call_sync_sequence(clnt, server, &msg,
6835 &args.seq_args, &res.seq_res);
6836 if (status)
6837 return status;
6838
6839 renew_lease(server, now);
6840 return 0;
6841}
6842
6843#ifdef CONFIG_NFS_V4_1
6844
6845/*
6846 * This operation also signals the server that this client is
6847 * performing migration recovery. The server can stop asserting
6848 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6849 * performing this operation is identified in the SEQUENCE
6850 * operation in this compound.
6851 *
6852 * When the client supports GETATTR(fs_locations_info), it can
6853 * be plumbed in here.
6854 */
6855static int _nfs41_proc_get_locations(struct inode *inode,
6856 struct nfs4_fs_locations *locations,
6857 struct page *page, struct rpc_cred *cred)
6858{
6859 struct nfs_server *server = NFS_SERVER(inode);
6860 struct rpc_clnt *clnt = server->client;
6861 u32 bitmask[2] = {
6862 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6863 };
6864 struct nfs4_fs_locations_arg args = {
6865 .fh = NFS_FH(inode),
6866 .page = page,
6867 .bitmask = bitmask,
6868 .migration = 1, /* skip LOOKUP */
6869 };
6870 struct nfs4_fs_locations_res res = {
6871 .fs_locations = locations,
6872 .migration = 1,
6873 };
6874 struct rpc_message msg = {
6875 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6876 .rpc_argp = &args,
6877 .rpc_resp = &res,
6878 .rpc_cred = cred,
6879 };
6880 int status;
6881
6882 nfs_fattr_init(&locations->fattr);
6883 locations->server = server;
6884 locations->nlocations = 0;
6885
6886 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6887 nfs4_set_sequence_privileged(&args.seq_args);
6888 status = nfs4_call_sync_sequence(clnt, server, &msg,
6889 &args.seq_args, &res.seq_res);
6890 if (status == NFS4_OK &&
6891 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6892 status = -NFS4ERR_LEASE_MOVED;
6893 return status;
6894}
6895
6896#endif /* CONFIG_NFS_V4_1 */
6897
6898/**
6899 * nfs4_proc_get_locations - discover locations for a migrated FSID
6900 * @inode: inode on FSID that is migrating
6901 * @locations: result of query
6902 * @page: buffer
6903 * @cred: credential to use for this operation
6904 *
6905 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6906 * operation failed, or a negative errno if a local error occurred.
6907 *
6908 * On success, "locations" is filled in, but if the server has
6909 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6910 * asserted.
6911 *
6912 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6913 * from this client that require migration recovery.
6914 */
6915int nfs4_proc_get_locations(struct inode *inode,
6916 struct nfs4_fs_locations *locations,
6917 struct page *page, struct rpc_cred *cred)
6918{
6919 struct nfs_server *server = NFS_SERVER(inode);
6920 struct nfs_client *clp = server->nfs_client;
6921 const struct nfs4_mig_recovery_ops *ops =
6922 clp->cl_mvops->mig_recovery_ops;
6923 struct nfs4_exception exception = { };
6924 int status;
6925
6926 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6927 (unsigned long long)server->fsid.major,
6928 (unsigned long long)server->fsid.minor,
6929 clp->cl_hostname);
6930 nfs_display_fhandle(NFS_FH(inode), __func__);
6931
6932 do {
6933 status = ops->get_locations(inode, locations, page, cred);
6934 if (status != -NFS4ERR_DELAY)
6935 break;
6936 nfs4_handle_exception(server, status, &exception);
6937 } while (exception.retry);
6938 return status;
6939}
6940
44c99933
CL		 6941/*
6942 * This operation also signals the server that this client is
6943 * performing "lease moved" recovery. The server can stop
6944 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6945 * is appended to this compound to identify the client ID which is
6946 * performing recovery.
6947 */
6948static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6949{
6950 struct nfs_server *server = NFS_SERVER(inode);
6951 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6952 struct rpc_clnt *clnt = server->client;
6953 struct nfs4_fsid_present_arg args = {
6954 .fh = NFS_FH(inode),
6955 .clientid = clp->cl_clientid,
6956 .renew = 1, /* append RENEW */
6957 };
6958 struct nfs4_fsid_present_res res = {
6959 .renew = 1,
6960 };
6961 struct rpc_message msg = {
6962 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6963 .rpc_argp = &args,
6964 .rpc_resp = &res,
6965 .rpc_cred = cred,
6966 };
6967 unsigned long now = jiffies;
6968 int status;
6969
6970 res.fh = nfs_alloc_fhandle();
6971 if (res.fh == NULL)
6972 return -ENOMEM;
6973
6974 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6975 nfs4_set_sequence_privileged(&args.seq_args);
6976 status = nfs4_call_sync_sequence(clnt, server, &msg,
6977 &args.seq_args, &res.seq_res);
6978 nfs_free_fhandle(res.fh);
6979 if (status)
6980 return status;
6981
6982 do_renew_lease(clp, now);
6983 return 0;
6984}
6985
6986#ifdef CONFIG_NFS_V4_1
6987
6988/*
6989 * This operation also signals the server that this client is
6990 * performing "lease moved" recovery. The server can stop asserting
6991 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
6992 * this operation is identified in the SEQUENCE operation in this
6993 * compound.
6994 */
6995static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6996{
6997 struct nfs_server *server = NFS_SERVER(inode);
6998 struct rpc_clnt *clnt = server->client;
6999 struct nfs4_fsid_present_arg args = {
7000 .fh = NFS_FH(inode),
7001 };
7002 struct nfs4_fsid_present_res res = {
7003 };
7004 struct rpc_message msg = {
7005 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
7006 .rpc_argp = &args,
7007 .rpc_resp = &res,
7008 .rpc_cred = cred,
7009 };
7010 int status;
7011
7012 res.fh = nfs_alloc_fhandle();
7013 if (res.fh == NULL)
7014 return -ENOMEM;
7015
7016 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
7017 nfs4_set_sequence_privileged(&args.seq_args);
7018 status = nfs4_call_sync_sequence(clnt, server, &msg,
7019 &args.seq_args, &res.seq_res);
7020 nfs_free_fhandle(res.fh);
7021 if (status == NFS4_OK &&
7022 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
7023 status = -NFS4ERR_LEASE_MOVED;
7024 return status;
7025}
7026
7027#endif /* CONFIG_NFS_V4_1 */
7028
7029/**
7030 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
7031 * @inode: inode on FSID to check
7032 * @cred: credential to use for this operation
7033 *
7034 * Server indicates whether the FSID is present, moved, or not
7035 * recognized. This operation is necessary to clear a LEASE_MOVED
7036 * condition for this client ID.
7037 *
7038 * Returns NFS4_OK if the FSID is present on this server,
7039 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
7040 * NFS4ERR code if some error occurred on the server, or a
7041 * negative errno if a local failure occurred.
7042 */
7043int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
7044{
7045 struct nfs_server *server = NFS_SERVER(inode);
7046 struct nfs_client *clp = server->nfs_client;
7047 const struct nfs4_mig_recovery_ops *ops =
7048 clp->cl_mvops->mig_recovery_ops;
7049 struct nfs4_exception exception = { };
7050 int status;
7051
7052 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
7053 (unsigned long long)server->fsid.major,
7054 (unsigned long long)server->fsid.minor,
7055 clp->cl_hostname);
7056 nfs_display_fhandle(NFS_FH(inode), __func__);
7057
7058 do {
7059 status = ops->fsid_present(inode, cred);
7060 if (status != -NFS4ERR_DELAY)
7061 break;
7062 nfs4_handle_exception(server, status, &exception);
7063 } while (exception.retry);
7064 return status;
7065}
7066
5ec16a85 7067/**
a5250def
WAA		 7068 * If 'use_integrity' is true and the state managment nfs_client
7069 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
7070 * and the machine credential as per RFC3530bis and RFC5661 Security
7071 * Considerations sections. Otherwise, just use the user cred with the
7072 * filesystem's rpc_client.
5ec16a85 7073 */
a5250def 7074static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
5a5ea0d4
BS		 7075{
7076 int status;
7077 struct nfs4_secinfo_arg args = {
7078 .dir_fh = NFS_FH(dir),
7079 .name = name,
7080 };
7081 struct nfs4_secinfo_res res = {
7082 .flavors = flavors,
7083 };
7084 struct rpc_message msg = {
7085 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
7086 .rpc_argp = &args,
7087 .rpc_resp = &res,
7088 };
a5250def 7089 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
7cb852df 7090 struct rpc_cred *cred = NULL;
a5250def
WAA		 7091
7092 if (use_integrity) {
7093 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
7cb852df
WAA		 7094 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
7095 msg.rpc_cred = cred;
a5250def 7096 }
5a5ea0d4
BS		 7097
7098 dprintk("NFS call secinfo %s\n", name->name);
8b5bee2e
WAA		 7099
7100 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
7101 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
7102
a5250def
WAA		 7103 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
7104 &res.seq_res, 0);
5a5ea0d4 7105 dprintk("NFS reply secinfo: %d\n", status);
a5250def 7106
7cb852df
WAA		 7107 if (cred)
7108 put_rpccred(cred);
a5250def 7109
5a5ea0d4
BS		 7110 return status;
7111}
7112
72de53ec
BS		 7113int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
7114 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 7115{
7116 struct nfs4_exception exception = { };
7117 int err;
7118 do {
a5250def
WAA		 7119 err = -NFS4ERR_WRONGSEC;
7120
7121 /* try to use integrity protection with machine cred */
7122 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
7123 err = _nfs4_proc_secinfo(dir, name, flavors, true);
7124
7125 /*
7126 * if unable to use integrity protection, or SECINFO with
7127 * integrity protection returns NFS4ERR_WRONGSEC (which is
7128 * disallowed by spec, but exists in deployed servers) use
7129 * the current filesystem's rpc_client and the user cred.
7130 */
7131 if (err == -NFS4ERR_WRONGSEC)
7132 err = _nfs4_proc_secinfo(dir, name, flavors, false);
7133
078ea3df
TM		 7134 trace_nfs4_secinfo(dir, name, err);
7135 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5a5ea0d4
BS		 7136 &exception);
7137 } while (exception.retry);
7138 return err;
7139}
7140
557134a3 7141#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 7142/*
7143 * Check the exchange flags returned by the server for invalid flags, having
7144 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
7145 * DS flags set.
7146 */
7147static int nfs4_check_cl_exchange_flags(u32 flags)
7148{
7149 if (flags & ~EXCHGID4_FLAG_MASK_R)
7150 goto out_inval;
7151 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
7152 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
7153 goto out_inval;
7154 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
7155 goto out_inval;
7156 return NFS_OK;
7157out_inval:
7158 return -NFS4ERR_INVAL;
7159}
7160
78fe0f41 7161static bool
79d4e1f0
CL		 7162nfs41_same_server_scope(struct nfs41_server_scope *a,
7163 struct nfs41_server_scope *b)
78fe0f41 7164{
49ad0145
AS		 7165 if (a->server_scope_sz != b->server_scope_sz)
7166 return false;
7167 return memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0;
78fe0f41
WAA		 7168}
7169
02a95dee
AA		 7170static void
7171nfs4_bind_one_conn_to_session_done(struct rpc_task *task, void *calldata)
7172{
7173}
7174
7175static const struct rpc_call_ops nfs4_bind_one_conn_to_session_ops = {
7176 .rpc_call_done = &nfs4_bind_one_conn_to_session_done,
7177};
7178
7c44f1ae 7179/*
d9ddbf5d 7180 * nfs4_proc_bind_one_conn_to_session()
7c44f1ae
WAA		 7181 *
7182 * The 4.1 client currently uses the same TCP connection for the
7183 * fore and backchannel.
7184 */
d9ddbf5d
TM		 7185static
7186int nfs4_proc_bind_one_conn_to_session(struct rpc_clnt *clnt,
7187 struct rpc_xprt *xprt,
7188 struct nfs_client *clp,
7189 struct rpc_cred *cred)
7c44f1ae
WAA		 7190{
7191 int status;
71a097c6
TM		 7192 struct nfs41_bind_conn_to_session_args args = {
7193 .client = clp,
7194 .dir = NFS4_CDFC4_FORE_OR_BOTH,
7195 };
7c44f1ae
WAA		 7196 struct nfs41_bind_conn_to_session_res res;
7197 struct rpc_message msg = {
7198 .rpc_proc =
7199 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
71a097c6 7200 .rpc_argp = &args,
7c44f1ae 7201 .rpc_resp = &res,
2cf047c9 7202 .rpc_cred = cred,
7c44f1ae 7203 };
d9ddbf5d
TM		 7204 struct rpc_task_setup task_setup_data = {
7205 .rpc_client = clnt,
7206 .rpc_xprt = xprt,
02a95dee 7207 .callback_ops = &nfs4_bind_one_conn_to_session_ops,
d9ddbf5d
TM		 7208 .rpc_message = &msg,
7209 .flags = RPC_TASK_TIMEOUT,
7210 };
7211 struct rpc_task *task;
7c44f1ae 7212
71a097c6
TM		 7213 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id);
7214 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN))
7215 args.dir = NFS4_CDFC4_FORE;
7c44f1ae 7216
d9ddbf5d
TM		 7217 /* Do not set the backchannel flag unless this is clnt->cl_xprt */
7218 if (xprt != rcu_access_pointer(clnt->cl_xprt))
7219 args.dir = NFS4_CDFC4_FORE;
7220
7221 task = rpc_run_task(&task_setup_data);
7222 if (!IS_ERR(task)) {
7223 status = task->tk_status;
7224 rpc_put_task(task);
7225 } else
7226 status = PTR_ERR(task);
c6d01c6f 7227 trace_nfs4_bind_conn_to_session(clp, status);
7c44f1ae 7228 if (status == 0) {
71a097c6 7229 if (memcmp(res.sessionid.data,
7c44f1ae
WAA		 7230 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
7231 dprintk("NFS: %s: Session ID mismatch\n", __func__);
c7ae7639 7232 return -EIO;
7c44f1ae 7233 }
71a097c6 7234 if ((res.dir & args.dir) != res.dir || res.dir == 0) {
7c44f1ae
WAA		 7235 dprintk("NFS: %s: Unexpected direction from server\n",
7236 __func__);
c7ae7639 7237 return -EIO;
7c44f1ae 7238 }
71a097c6 7239 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) {
7c44f1ae
WAA		 7240 dprintk("NFS: %s: Server returned RDMA mode = true\n",
7241 __func__);
c7ae7639 7242 return -EIO;
7c44f1ae
WAA		 7243 }
7244 }
c7ae7639 7245
7c44f1ae
WAA		 7246 return status;
7247}
7248
d9ddbf5d
TM		 7249struct rpc_bind_conn_calldata {
7250 struct nfs_client *clp;
7251 struct rpc_cred *cred;
7252};
7253
7254static int
7255nfs4_proc_bind_conn_to_session_callback(struct rpc_clnt *clnt,
7256 struct rpc_xprt *xprt,
7257 void *calldata)
7258{
7259 struct rpc_bind_conn_calldata *p = calldata;
7260
7261 return nfs4_proc_bind_one_conn_to_session(clnt, xprt, p->clp, p->cred);
7262}
7263
7264int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7265{
7266 struct rpc_bind_conn_calldata data = {
7267 .clp = clp,
7268 .cred = cred,
7269 };
7270 return rpc_clnt_iterate_for_each_xprt(clp->cl_rpcclient,
7271 nfs4_proc_bind_conn_to_session_callback, &data);
7272}
7273
99fe60d0 7274/*
fa940720
WAA		 7275 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
7276 * and operations we'd like to see to enable certain features in the allow map
2031cd1a
WAA		 7277 */
7278static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
7279 .how = SP4_MACH_CRED,
7280 .enforce.u.words = {
7281 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
7282 1 << (OP_EXCHANGE_ID - 32) |
7283 1 << (OP_CREATE_SESSION - 32) |
7284 1 << (OP_DESTROY_SESSION - 32) |
7285 1 << (OP_DESTROY_CLIENTID - 32)
fa940720
WAA		 7286 },
7287 .allow.u.words = {
7288 [0] = 1 << (OP_CLOSE) |
99ade3c7 7289 1 << (OP_OPEN_DOWNGRADE) |
a0279625 7290 1 << (OP_LOCKU) |
99ade3c7 7291 1 << (OP_DELEGRETURN) |
a0279625 7292 1 << (OP_COMMIT),
8b5bee2e 7293 [1] = 1 << (OP_SECINFO - 32) |
3787d506 7294 1 << (OP_SECINFO_NO_NAME - 32) |
99ade3c7 7295 1 << (OP_LAYOUTRETURN - 32) |
3787d506 7296 1 << (OP_TEST_STATEID - 32) |
a0279625
WAA		 7297 1 << (OP_FREE_STATEID - 32) |
7298 1 << (OP_WRITE - 32)
2031cd1a
WAA		 7299 }
7300};
7301
7302/*
7303 * Select the state protection mode for client `clp' given the server results
7304 * from exchange_id in `sp'.
99fe60d0 7305 *
2031cd1a
WAA		 7306 * Returns 0 on success, negative errno otherwise.
7307 */
7308static int nfs4_sp4_select_mode(struct nfs_client *clp,
7309 struct nfs41_state_protection *sp)
7310{
7311 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
7312 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
7313 1 << (OP_EXCHANGE_ID - 32) |
7314 1 << (OP_CREATE_SESSION - 32) |
7315 1 << (OP_DESTROY_SESSION - 32) |
7316 1 << (OP_DESTROY_CLIENTID - 32)
7317 };
7318 unsigned int i;
7319
7320 if (sp->how == SP4_MACH_CRED) {
7321 /* Print state protect result */
7322 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
7323 for (i = 0; i <= LAST_NFS4_OP; i++) {
7324 if (test_bit(i, sp->enforce.u.longs))
7325 dfprintk(MOUNT, " enforce op %d\n", i);
7326 if (test_bit(i, sp->allow.u.longs))
7327 dfprintk(MOUNT, " allow op %d\n", i);
7328 }
7329
7330 /* make sure nothing is on enforce list that isn't supported */
7331 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
7332 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
7333 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
7334 return -EINVAL;
7335 }
7336 }
7337
7338 /*
7339 * Minimal mode - state operations are allowed to use machine
7340 * credential. Note this already happens by default, so the
7341 * client doesn't have to do anything more than the negotiation.
7342 *
7343 * NOTE: we don't care if EXCHANGE_ID is in the list -
7344 * we're already using the machine cred for exchange_id
7345 * and will never use a different cred.
7346 */
7347 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
7348 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
7349 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
7350 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
7351 dfprintk(MOUNT, "sp4_mach_cred:\n");
7352 dfprintk(MOUNT, " minimal mode enabled\n");
7353 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
7354 } else {
7355 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
7356 return -EINVAL;
7357 }
fa940720
WAA		 7358
7359 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
99ade3c7
AE		 7360 test_bit(OP_OPEN_DOWNGRADE, sp->allow.u.longs) &&
7361 test_bit(OP_DELEGRETURN, sp->allow.u.longs) &&
fa940720
WAA		 7362 test_bit(OP_LOCKU, sp->allow.u.longs)) {
7363 dfprintk(MOUNT, " cleanup mode enabled\n");
7364 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
7365 }
8b5bee2e 7366
99ade3c7
AE		 7367 if (test_bit(OP_LAYOUTRETURN, sp->allow.u.longs)) {
7368 dfprintk(MOUNT, " pnfs cleanup mode enabled\n");
7369 set_bit(NFS_SP4_MACH_CRED_PNFS_CLEANUP,
7370 &clp->cl_sp4_flags);
7371 }
7372
8b5bee2e
WAA		 7373 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
7374 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
7375 dfprintk(MOUNT, " secinfo mode enabled\n");
7376 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
7377 }
3787d506
WAA		 7378
7379 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
7380 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
7381 dfprintk(MOUNT, " stateid mode enabled\n");
7382 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
7383 }
8c21c62c
WAA		 7384
7385 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
7386 dfprintk(MOUNT, " write mode enabled\n");
7387 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
7388 }
7389
7390 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
7391 dfprintk(MOUNT, " commit mode enabled\n");
7392 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
7393 }
2031cd1a
WAA		 7394 }
7395
7396 return 0;
7397}
7398
8d89bd70
AA		 7399struct nfs41_exchange_id_data {
7400 struct nfs41_exchange_id_res res;
7401 struct nfs41_exchange_id_args args;
ad0849a7 7402 struct rpc_xprt *xprt;
8d89bd70
AA		 7403 int rpc_status;
7404};
7405
7406static void nfs4_exchange_id_done(struct rpc_task *task, void *data)
7407{
7408 struct nfs41_exchange_id_data *cdata =
7409 (struct nfs41_exchange_id_data *)data;
7410 struct nfs_client *clp = cdata->args.client;
7411 int status = task->tk_status;
7412
7413 trace_nfs4_exchange_id(clp, status);
7414
7415 if (status == 0)
7416 status = nfs4_check_cl_exchange_flags(cdata->res.flags);
ad0849a7
AA		 7417
7418 if (cdata->xprt && status == 0) {
7419 status = nfs4_detect_session_trunking(clp, &cdata->res,
7420 cdata->xprt);
7421 goto out;
7422 }
7423
8d89bd70
AA		 7424 if (status == 0)
7425 status = nfs4_sp4_select_mode(clp, &cdata->res.state_protect);
7426
7427 if (status == 0) {
7428 clp->cl_clientid = cdata->res.clientid;
7429 clp->cl_exchange_flags = cdata->res.flags;
838edb94 7430 clp->cl_seqid = cdata->res.seqid;
8d89bd70 7431 /* Client ID is not confirmed */
838edb94 7432 if (!(cdata->res.flags & EXCHGID4_FLAG_CONFIRMED_R))
8d89bd70 7433 clear_bit(NFS4_SESSION_ESTABLISHED,
838edb94 7434 &clp->cl_session->session_state);
8d89bd70
AA		 7435
7436 kfree(clp->cl_serverowner);
7437 clp->cl_serverowner = cdata->res.server_owner;
7438 cdata->res.server_owner = NULL;
7439
7440 /* use the most recent implementation id */
7441 kfree(clp->cl_implid);
7442 clp->cl_implid = cdata->res.impl_id;
7443 cdata->res.impl_id = NULL;
7444
7445 if (clp->cl_serverscope != NULL &&
7446 !nfs41_same_server_scope(clp->cl_serverscope,
7447 cdata->res.server_scope)) {
7448 dprintk("%s: server_scope mismatch detected\n",
7449 __func__);
7450 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
7451 kfree(clp->cl_serverscope);
7452 clp->cl_serverscope = NULL;
7453 }
7454
7455 if (clp->cl_serverscope == NULL) {
7456 clp->cl_serverscope = cdata->res.server_scope;
7457 cdata->res.server_scope = NULL;
7458 }
ad0849a7
AA		 7459 /* Save the EXCHANGE_ID verifier session trunk tests */
7460 memcpy(clp->cl_confirm.data, cdata->args.verifier->data,
7461 sizeof(clp->cl_confirm.data));
8d89bd70 7462 }
ad0849a7 7463out:
8d89bd70 7464 cdata->rpc_status = status;
ad0849a7 7465 return;
8d89bd70
AA		 7466}
7467
7468static void nfs4_exchange_id_release(void *data)
7469{
7470 struct nfs41_exchange_id_data *cdata =
7471 (struct nfs41_exchange_id_data *)data;
7472
ad0849a7
AA		 7473 if (cdata->xprt) {
7474 xprt_put(cdata->xprt);
7475 rpc_clnt_xprt_switch_put(cdata->args.client->cl_rpcclient);
7476 }
63513232 7477 nfs_put_client(cdata->args.client);
8d89bd70
AA		 7478 kfree(cdata->res.impl_id);
7479 kfree(cdata->res.server_scope);
7480 kfree(cdata->res.server_owner);
7481 kfree(cdata);
7482}
7483
7484static const struct rpc_call_ops nfs4_exchange_id_call_ops = {
7485 .rpc_call_done = nfs4_exchange_id_done,
7486 .rpc_release = nfs4_exchange_id_release,
7487};
7488
2031cd1a
WAA		 7489/*
7490 * _nfs4_proc_exchange_id()
6bbb4ae8 7491 *
2031cd1a 7492 * Wrapper for EXCHANGE_ID operation.
99fe60d0 7493 */
2031cd1a 7494static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
ad0849a7 7495 u32 sp4_how, struct rpc_xprt *xprt)
99fe60d0
BH		 7496{
7497 nfs4_verifier verifier;
99fe60d0
BH		 7498 struct rpc_message msg = {
7499 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
99fe60d0
BH		 7500 .rpc_cred = cred,
7501 };
8d89bd70
AA		 7502 struct rpc_task_setup task_setup_data = {
7503 .rpc_client = clp->cl_rpcclient,
7504 .callback_ops = &nfs4_exchange_id_call_ops,
7505 .rpc_message = &msg,
7506 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
7507 };
7508 struct nfs41_exchange_id_data *calldata;
7509 struct rpc_task *task;
e917f0d1 7510 int status;
8d89bd70
AA		 7511
7512 if (!atomic_inc_not_zero(&clp->cl_count))
e917f0d1 7513 return -EIO;
8d89bd70 7514
8d89bd70 7515 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
5c737cb2
DW		 7516 if (!calldata) {
7517 nfs_put_client(clp);
e917f0d1 7518 return -ENOMEM;
5c737cb2 7519 }
99fe60d0 7520
ad0849a7
AA		 7521 if (!xprt)
7522 nfs4_init_boot_verifier(clp, &verifier);
873e3851
JL		 7523
7524 status = nfs4_init_uniform_client_string(clp);
7525 if (status)
8d89bd70 7526 goto out_calldata;
3a6bb738 7527
8d89bd70
AA		 7528 calldata->res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
7529 GFP_NOFS);
7530 status = -ENOMEM;
7531 if (unlikely(calldata->res.server_owner == NULL))
7532 goto out_calldata;
78fe0f41 7533
8d89bd70 7534 calldata->res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 7535 GFP_NOFS);
8d89bd70 7536 if (unlikely(calldata->res.server_scope == NULL))
acdeb69d 7537 goto out_server_owner;
78fe0f41 7538
8d89bd70
AA		 7539 calldata->res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
7540 if (unlikely(calldata->res.impl_id == NULL))
7d2ed9ac 7541 goto out_server_scope;
7d2ed9ac 7542
2031cd1a
WAA		 7543 switch (sp4_how) {
7544 case SP4_NONE:
8d89bd70 7545 calldata->args.state_protect.how = SP4_NONE;
2031cd1a
WAA		 7546 break;
7547
7548 case SP4_MACH_CRED:
8d89bd70 7549 calldata->args.state_protect = nfs4_sp4_mach_cred_request;
2031cd1a
WAA		 7550 break;
7551
7552 default:
7553 /* unsupported! */
7554 WARN_ON_ONCE(1);
7555 status = -EINVAL;
6b55970b 7556 goto out_impl_id;
2031cd1a 7557 }
ad0849a7
AA		 7558 if (xprt) {
7559 calldata->xprt = xprt;
7560 task_setup_data.rpc_xprt = xprt;
7561 task_setup_data.flags =
7562 RPC_TASK_SOFT|RPC_TASK_SOFTCONN|RPC_TASK_ASYNC;
7563 calldata->args.verifier = &clp->cl_confirm;
7564 } else {
7565 calldata->args.verifier = &verifier;
7566 }
8d89bd70
AA		 7567 calldata->args.client = clp;
7568#ifdef CONFIG_NFS_V4_1_MIGRATION
7569 calldata->args.flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
7570 EXCHGID4_FLAG_BIND_PRINC_STATEID |
7571 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
7572#else
7573 calldata->args.flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
7574 EXCHGID4_FLAG_BIND_PRINC_STATEID,
7575#endif
7576 msg.rpc_argp = &calldata->args;
7577 msg.rpc_resp = &calldata->res;
7578 task_setup_data.callback_data = calldata;
2031cd1a 7579
8d89bd70 7580 task = rpc_run_task(&task_setup_data);
63513232
OK		 7581 if (IS_ERR(task))
7582 return PTR_ERR(task);
7d2ed9ac 7583
ad0849a7
AA		 7584 if (!xprt) {
7585 status = rpc_wait_for_completion_task(task);
7586 if (!status)
7587 status = calldata->rpc_status;
7588 } else /* session trunking test */
8d89bd70 7589 status = calldata->rpc_status;
ad0849a7 7590
8d89bd70 7591 rpc_put_task(task);
abe9a6d5 7592out:
99fe60d0 7593 return status;
8d89bd70
AA		 7594
7595out_impl_id:
7596 kfree(calldata->res.impl_id);
7597out_server_scope:
7598 kfree(calldata->res.server_scope);
7599out_server_owner:
7600 kfree(calldata->res.server_owner);
7601out_calldata:
7602 kfree(calldata);
63513232 7603 nfs_put_client(clp);
8d89bd70 7604 goto out;
99fe60d0
BH		 7605}
7606
2031cd1a
WAA		 7607/*
7608 * nfs4_proc_exchange_id()
7609 *
7610 * Returns zero, a negative errno, or a negative NFS4ERR status code.
7611 *
7612 * Since the clientid has expired, all compounds using sessions
7613 * associated with the stale clientid will be returning
7614 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
7615 * be in some phase of session reset.
7616 *
7617 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
7618 */
7619int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
7620{
7621 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
7622 int status;
7623
7624 /* try SP4_MACH_CRED if krb5i/p */
7625 if (authflavor == RPC_AUTH_GSS_KRB5I ||
7626 authflavor == RPC_AUTH_GSS_KRB5P) {
ad0849a7 7627 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED, NULL);
2031cd1a
WAA		 7628 if (!status)
7629 return 0;
7630 }
7631
7632 /* try SP4_NONE */
ad0849a7 7633 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE, NULL);
2031cd1a
WAA		 7634}
7635
04fa2c6b
AA		 7636/**
7637 * nfs4_test_session_trunk
7638 *
7639 * This is an add_xprt_test() test function called from
7640 * rpc_clnt_setup_test_and_add_xprt.
7641 *
7642 * The rpc_xprt_switch is referrenced by rpc_clnt_setup_test_and_add_xprt
7643 * and is dereferrenced in nfs4_exchange_id_release
7644 *
7645 * Upon success, add the new transport to the rpc_clnt
7646 *
7647 * @clnt: struct rpc_clnt to get new transport
7648 * @xprt: the rpc_xprt to test
7649 * @data: call data for _nfs4_proc_exchange_id.
7650 */
7651int nfs4_test_session_trunk(struct rpc_clnt *clnt, struct rpc_xprt *xprt,
7652 void *data)
7653{
7654 struct nfs4_add_xprt_data *adata = (struct nfs4_add_xprt_data *)data;
7655 u32 sp4_how;
7656
7657 dprintk("--> %s try %s\n", __func__,
7658 xprt->address_strings[RPC_DISPLAY_ADDR]);
7659
7660 sp4_how = (adata->clp->cl_sp4_flags == 0 ? SP4_NONE : SP4_MACH_CRED);
7661
7662 /* Test connection for session trunking. Async exchange_id call */
7663 return _nfs4_proc_exchange_id(adata->clp, adata->cred, sp4_how, xprt);
2031cd1a 7664}
04fa2c6b 7665EXPORT_SYMBOL_GPL(nfs4_test_session_trunk);
2031cd1a 7666
66245539
TM		 7667static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
7668 struct rpc_cred *cred)
7669{
7670 struct rpc_message msg = {
7671 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
7672 .rpc_argp = clp,
7673 .rpc_cred = cred,
7674 };
7675 int status;
7676
7677 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7678 trace_nfs4_destroy_clientid(clp, status);
66245539 7679 if (status)
02c67525 7680 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 7681 "DESTROY_CLIENTID.", status, clp->cl_hostname);
7682 return status;
7683}
7684
7685static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
7686 struct rpc_cred *cred)
7687{
7688 unsigned int loop;
7689 int ret;
7690
7691 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
7692 ret = _nfs4_proc_destroy_clientid(clp, cred);
7693 switch (ret) {
7694 case -NFS4ERR_DELAY:
7695 case -NFS4ERR_CLIENTID_BUSY:
7696 ssleep(1);
7697 break;
7698 default:
7699 return ret;
7700 }
7701 }
7702 return 0;
7703}
7704
7705int nfs4_destroy_clientid(struct nfs_client *clp)
7706{
7707 struct rpc_cred *cred;
7708 int ret = 0;
7709
7710 if (clp->cl_mvops->minor_version < 1)
7711 goto out;
7712 if (clp->cl_exchange_flags == 0)
7713 goto out;
05f4c350
CL		 7714 if (clp->cl_preserve_clid)
7715 goto out;
73d8bde5 7716 cred = nfs4_get_clid_cred(clp);
66245539
TM		 7717 ret = nfs4_proc_destroy_clientid(clp, cred);
7718 if (cred)
7719 put_rpccred(cred);
7720 switch (ret) {
7721 case 0:
7722 case -NFS4ERR_STALE_CLIENTID:
7723 clp->cl_exchange_flags = 0;
7724 }
7725out:
7726 return ret;
7727}
7728
2050f0cc
AA		 7729struct nfs4_get_lease_time_data {
7730 struct nfs4_get_lease_time_args *args;
7731 struct nfs4_get_lease_time_res *res;
7732 struct nfs_client *clp;
7733};
7734
7735static void nfs4_get_lease_time_prepare(struct rpc_task *task,
7736 void *calldata)
7737{
2050f0cc
AA		 7738 struct nfs4_get_lease_time_data *data =
7739 (struct nfs4_get_lease_time_data *)calldata;
7740
7741 dprintk("--> %s\n", __func__);
7742 /* just setup sequence, do not trigger session recovery
7743 since we're invoked within one */
7981c8a6 7744 nfs4_setup_sequence(data->clp,
d9afbd1b
TM		 7745 &data->args->la_seq_args,
7746 &data->res->lr_seq_res,
7747 task);
2050f0cc
AA		 7748 dprintk("<-- %s\n", __func__);
7749}
7750
7751/*
7752 * Called from nfs4_state_manager thread for session setup, so don't recover
7753 * from sequence operation or clientid errors.
7754 */
7755static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
7756{
7757 struct nfs4_get_lease_time_data *data =
7758 (struct nfs4_get_lease_time_data *)calldata;
7759
7760 dprintk("--> %s\n", __func__);
14516c3a
TM		 7761 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
7762 return;
2050f0cc
AA		 7763 switch (task->tk_status) {
7764 case -NFS4ERR_DELAY:
7765 case -NFS4ERR_GRACE:
7766 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
7767 rpc_delay(task, NFS4_POLL_RETRY_MIN);
7768 task->tk_status = 0;
a8a4ae3a
AA		 7769 /* fall through */
7770 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 7771 rpc_restart_call_prepare(task);
2050f0cc
AA		 7772 return;
7773 }
2050f0cc
AA		 7774 dprintk("<-- %s\n", __func__);
7775}
7776
17280175 7777static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 7778 .rpc_call_prepare = nfs4_get_lease_time_prepare,
7779 .rpc_call_done = nfs4_get_lease_time_done,
7780};
7781
7782int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
7783{
7784 struct rpc_task *task;
7785 struct nfs4_get_lease_time_args args;
7786 struct nfs4_get_lease_time_res res = {
7787 .lr_fsinfo = fsinfo,
7788 };
7789 struct nfs4_get_lease_time_data data = {
7790 .args = &args,
7791 .res = &res,
7792 .clp = clp,
7793 };
7794 struct rpc_message msg = {
7795 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
7796 .rpc_argp = &args,
7797 .rpc_resp = &res,
7798 };
7799 struct rpc_task_setup task_setup = {
7800 .rpc_client = clp->cl_rpcclient,
7801 .rpc_message = &msg,
7802 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 7803 .callback_data = &data,
7804 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 7805 };
7806 int status;
7807
a9c92d6b 7808 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 7809 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 7810 task = rpc_run_task(&task_setup);
7811
7812 if (IS_ERR(task))
f6148713 7813 return PTR_ERR(task);
2050f0cc 7814
f6148713
AS		 7815 status = task->tk_status;
7816 rpc_put_task(task);
2050f0cc
AA		 7817 return status;
7818}
7819
fc931582
AA		 7820/*
7821 * Initialize the values to be used by the client in CREATE_SESSION
7822 * If nfs4_init_session set the fore channel request and response sizes,
7823 * use them.
7824 *
7825 * Set the back channel max_resp_sz_cached to zero to force the client to
7826 * always set csa_cachethis to FALSE because the current implementation
7827 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
7828 */
6b26cc8c
CL		 7829static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args,
7830 struct rpc_clnt *clnt)
fc931582 7831{
18aad3d5 7832 unsigned int max_rqst_sz, max_resp_sz;
6b26cc8c 7833 unsigned int max_bc_payload = rpc_max_bc_payload(clnt);
18aad3d5
AA		 7834
7835 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
7836 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 7837
fc931582 7838 /* Fore channel attributes */
18aad3d5
AA		 7839 args->fc_attrs.max_rqst_sz = max_rqst_sz;
7840 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 7841 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 7842 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 7843
7844 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 7845 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 7846 __func__,
7847 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 7848 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 7849
7850 /* Back channel attributes */
6b26cc8c
CL		 7851 args->bc_attrs.max_rqst_sz = max_bc_payload;
7852 args->bc_attrs.max_resp_sz = max_bc_payload;
fc931582
AA		 7853 args->bc_attrs.max_resp_sz_cached = 0;
7854 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5405fc44 7855 args->bc_attrs.max_reqs = min_t(unsigned short, max_session_cb_slots, 1);
fc931582
AA		 7856
7857 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
7858 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
7859 __func__,
7860 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
7861 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
7862 args->bc_attrs.max_reqs);
7863}
7864
79969dd1
TM		 7865static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args,
7866 struct nfs41_create_session_res *res)
8d35301d 7867{
43c2e885 7868 struct nfs4_channel_attrs *sent = &args->fc_attrs;
79969dd1 7869 struct nfs4_channel_attrs *rcvd = &res->fc_attrs;
43c2e885 7870
43c2e885
BF		 7871 if (rcvd->max_resp_sz > sent->max_resp_sz)
7872 return -EINVAL;
7873 /*
7874 * Our requested max_ops is the minimum we need; we're not
7875 * prepared to break up compounds into smaller pieces than that.
7876 * So, no point even trying to continue if the server won't
7877 * cooperate:
7878 */
7879 if (rcvd->max_ops < sent->max_ops)
7880 return -EINVAL;
7881 if (rcvd->max_reqs == 0)
7882 return -EINVAL;
b4b9a0c1
VG		 7883 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
7884 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 7885 return 0;
8d35301d
AA		 7886}
7887
79969dd1
TM		 7888static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args,
7889 struct nfs41_create_session_res *res)
43c2e885
BF		 7890{
7891 struct nfs4_channel_attrs *sent = &args->bc_attrs;
79969dd1 7892 struct nfs4_channel_attrs *rcvd = &res->bc_attrs;
8d35301d 7893
b1c0df5f
TM		 7894 if (!(res->flags & SESSION4_BACK_CHAN))
7895 goto out;
43c2e885
BF		 7896 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
7897 return -EINVAL;
7898 if (rcvd->max_resp_sz < sent->max_resp_sz)
7899 return -EINVAL;
7900 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7901 return -EINVAL;
5405fc44 7902 if (rcvd->max_ops > sent->max_ops)
43c2e885 7903 return -EINVAL;
5405fc44 7904 if (rcvd->max_reqs > sent->max_reqs)
43c2e885 7905 return -EINVAL;
b1c0df5f 7906out:
43c2e885
BF		 7907 return 0;
7908}
8d35301d 7909
8d35301d 7910static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
79969dd1 7911 struct nfs41_create_session_res *res)
8d35301d 7912{
43c2e885 7913 int ret;
8d35301d 7914
79969dd1 7915 ret = nfs4_verify_fore_channel_attrs(args, res);
43c2e885
BF		 7916 if (ret)
7917 return ret;
79969dd1
TM		 7918 return nfs4_verify_back_channel_attrs(args, res);
7919}
7920
7921static void nfs4_update_session(struct nfs4_session *session,
7922 struct nfs41_create_session_res *res)
7923{
7924 nfs4_copy_sessionid(&session->sess_id, &res->sessionid);
e11259f9
TM		 7925 /* Mark client id and session as being confirmed */
7926 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;
7927 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state);
79969dd1
TM		 7928 session->flags = res->flags;
7929 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs));
b1c0df5f
TM		 7930 if (res->flags & SESSION4_BACK_CHAN)
7931 memcpy(&session->bc_attrs, &res->bc_attrs,
7932 sizeof(session->bc_attrs));
8d35301d
AA		 7933}
7934
848f5bda
TM		 7935static int _nfs4_proc_create_session(struct nfs_client *clp,
7936 struct rpc_cred *cred)
fc931582
AA		 7937{
7938 struct nfs4_session *session = clp->cl_session;
7939 struct nfs41_create_session_args args = {
7940 .client = clp,
79969dd1
TM		 7941 .clientid = clp->cl_clientid,
7942 .seqid = clp->cl_seqid,
fc931582
AA		 7943 .cb_program = NFS4_CALLBACK,
7944 };
79969dd1
TM		 7945 struct nfs41_create_session_res res;
7946
fc931582
AA		 7947 struct rpc_message msg = {
7948 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
7949 .rpc_argp = &args,
7950 .rpc_resp = &res,
848f5bda 7951 .rpc_cred = cred,
fc931582
AA		 7952 };
7953 int status;
7954
6b26cc8c 7955 nfs4_init_channel_attrs(&args, clp->cl_rpcclient);
0f91421e 7956 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 7957
1bd714f2 7958 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7959 trace_nfs4_create_session(clp, status);
fc931582 7960
b519d408
TM		 7961 switch (status) {
7962 case -NFS4ERR_STALE_CLIENTID:
7963 case -NFS4ERR_DELAY:
7964 case -ETIMEDOUT:
7965 case -EACCES:
7966 case -EAGAIN:
7967 goto out;
7968 };
7969
7970 clp->cl_seqid++;
43095d39 7971 if (!status) {
8d35301d 7972 /* Verify the session's negotiated channel_attrs values */
79969dd1 7973 status = nfs4_verify_channel_attrs(&args, &res);
fc931582 7974 /* Increment the clientid slot sequence id */
79969dd1
TM		 7975 if (status)
7976 goto out;
7977 nfs4_update_session(session, &res);
fc931582 7978 }
79969dd1 7979out:
fc931582
AA		 7980 return status;
7981}
7982
7983/*
7984 * Issues a CREATE_SESSION operation to the server.
7985 * It is the responsibility of the caller to verify the session is
7986 * expired before calling this routine.
7987 */
848f5bda 7988int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 7989{
7990 int status;
7991 unsigned *ptr;
fc931582
AA		 7992 struct nfs4_session *session = clp->cl_session;
7993
7994 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
7995
848f5bda 7996 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 7997 if (status)
7998 goto out;
7999
aacd5537
AA		 8000 /* Init or reset the session slot tables */
8001 status = nfs4_setup_session_slot_tables(session);
8002 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 8003 if (status)
8004 goto out;
8005
8006 ptr = (unsigned *)&session->sess_id.data[0];
8007 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
8008 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 8009out:
8010 dprintk("<-- %s\n", __func__);
8011 return status;
8012}
8013
0f3e66c6
AA		 8014/*
8015 * Issue the over-the-wire RPC DESTROY_SESSION.
8016 * The caller must serialize access to this routine.
8017 */
848f5bda
TM		 8018int nfs4_proc_destroy_session(struct nfs4_session *session,
8019 struct rpc_cred *cred)
0f3e66c6 8020{
848f5bda
TM		 8021 struct rpc_message msg = {
8022 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
8023 .rpc_argp = session,
8024 .rpc_cred = cred,
8025 };
0f3e66c6 8026 int status = 0;
0f3e66c6
AA		 8027
8028 dprintk("--> nfs4_proc_destroy_session\n");
8029
8030 /* session is still being setup */
e11259f9
TM		 8031 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state))
8032 return 0;
0f3e66c6 8033
1bd714f2 8034 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 8035 trace_nfs4_destroy_session(session->clp, status);
0f3e66c6
AA		 8036
8037 if (status)
08106ac7 8038 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 8039 "Session has been destroyed regardless...\n", status);
8040
8041 dprintk("<-- nfs4_proc_destroy_session\n");
8042 return status;
8043}
8044
fc01cea9
AA		 8045/*
8046 * Renew the cl_session lease.
8047 */
d5f8d3fe
TM		 8048struct nfs4_sequence_data {
8049 struct nfs_client *clp;
8050 struct nfs4_sequence_args args;
8051 struct nfs4_sequence_res res;
8052};
8053
dc96aef9
AB		 8054static void nfs41_sequence_release(void *data)
8055{
d5f8d3fe
TM		 8056 struct nfs4_sequence_data *calldata = data;
8057 struct nfs_client *clp = calldata->clp;
dc96aef9 8058
7135840f
AB		 8059 if (atomic_read(&clp->cl_count) > 1)
8060 nfs4_schedule_state_renewal(clp);
8061 nfs_put_client(clp);
d5f8d3fe 8062 kfree(calldata);
dc96aef9
AB		 8063}
8064
aa5190d0
TM		 8065static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
8066{
8067 switch(task->tk_status) {
8068 case -NFS4ERR_DELAY:
aa5190d0
TM		 8069 rpc_delay(task, NFS4_POLL_RETRY_MAX);
8070 return -EAGAIN;
8071 default:
0400a6b0 8072 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 8073 }
8074 return 0;
8075}
8076
dc96aef9 8077static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 8078{
d5f8d3fe
TM		 8079 struct nfs4_sequence_data *calldata = data;
8080 struct nfs_client *clp = calldata->clp;
fc01cea9 8081
14516c3a
TM		 8082 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
8083 return;
fc01cea9 8084
c6d01c6f 8085 trace_nfs4_sequence(clp, task->tk_status);
fc01cea9
AA		 8086 if (task->tk_status < 0) {
8087 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 8088 if (atomic_read(&clp->cl_count) == 1)
8089 goto out;
fc01cea9 8090
aa5190d0
TM		 8091 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
8092 rpc_restart_call_prepare(task);
fc01cea9
AA		 8093 return;
8094 }
8095 }
fc01cea9 8096 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 8097out:
fc01cea9
AA		 8098 dprintk("<-- %s\n", __func__);
8099}
8100
8101static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
8102{
d5f8d3fe
TM		 8103 struct nfs4_sequence_data *calldata = data;
8104 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 8105 struct nfs4_sequence_args *args;
8106 struct nfs4_sequence_res *res;
8107
fc01cea9
AA		 8108 args = task->tk_msg.rpc_argp;
8109 res = task->tk_msg.rpc_resp;
8110
7981c8a6 8111 nfs4_setup_sequence(clp, args, res, task);
fc01cea9
AA		 8112}
8113
8114static const struct rpc_call_ops nfs41_sequence_ops = {
8115 .rpc_call_done = nfs41_sequence_call_done,
8116 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 8117 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 8118};
8119
8fe72bac
TM		 8120static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
8121 struct rpc_cred *cred,
8122 bool is_privileged)
fc01cea9 8123{
d5f8d3fe 8124 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 8125 struct rpc_message msg = {
8126 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
8127 .rpc_cred = cred,
8128 };
71ac6da9
TM		 8129 struct rpc_task_setup task_setup_data = {
8130 .rpc_client = clp->cl_rpcclient,
8131 .rpc_message = &msg,
8fe72bac 8132 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 8133 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 8134 };
fc01cea9 8135
7135840f 8136 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 8137 return ERR_PTR(-EIO);
dfb4f309 8138 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 8139 if (calldata == NULL) {
7135840f 8140 nfs_put_client(clp);
71ac6da9 8141 return ERR_PTR(-ENOMEM);
fc01cea9 8142 }
a9c92d6b 8143 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 8144 if (is_privileged)
8145 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 8146 msg.rpc_argp = &calldata->args;
8147 msg.rpc_resp = &calldata->res;
8148 calldata->clp = clp;
71ac6da9 8149 task_setup_data.callback_data = calldata;
fc01cea9 8150
71ac6da9
TM		 8151 return rpc_run_task(&task_setup_data);
8152}
8153
2f60ea6b 8154static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 8155{
8156 struct rpc_task *task;
8157 int ret = 0;
8158
2f60ea6b 8159 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
d1f456b0 8160 return -EAGAIN;
8fe72bac 8161 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 8162 if (IS_ERR(task))
8163 ret = PTR_ERR(task);
8164 else
bf294b41 8165 rpc_put_task_async(task);
71ac6da9
TM		 8166 dprintk("<-- %s status=%d\n", __func__, ret);
8167 return ret;
8168}
8169
8170static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
8171{
8172 struct rpc_task *task;
8173 int ret;
8174
8fe72bac 8175 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 8176 if (IS_ERR(task)) {
8177 ret = PTR_ERR(task);
8178 goto out;
8179 }
8180 ret = rpc_wait_for_completion_task(task);
be824167 8181 if (!ret)
71ac6da9
TM		 8182 ret = task->tk_status;
8183 rpc_put_task(task);
8184out:
8185 dprintk("<-- %s status=%d\n", __func__, ret);
8186 return ret;
fc01cea9
AA		 8187}
8188
fce5c838
RL		 8189struct nfs4_reclaim_complete_data {
8190 struct nfs_client *clp;
8191 struct nfs41_reclaim_complete_args arg;
8192 struct nfs41_reclaim_complete_res res;
8193};
8194
8195static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
8196{
8197 struct nfs4_reclaim_complete_data *calldata = data;
8198
7981c8a6 8199 nfs4_setup_sequence(calldata->clp,
d9afbd1b
TM		 8200 &calldata->arg.seq_args,
8201 &calldata->res.seq_res,
8202 task);
fce5c838
RL		 8203}
8204
aa5190d0
TM		 8205static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
8206{
8207 switch(task->tk_status) {
8208 case 0:
8209 case -NFS4ERR_COMPLETE_ALREADY:
8210 case -NFS4ERR_WRONG_CRED: /* What to do here? */
8211 break;
8212 case -NFS4ERR_DELAY:
aa5190d0 8213 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 8214 /* fall through */
8215 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0 8216 return -EAGAIN;
0048fdd0
TM		 8217 case -NFS4ERR_BADSESSION:
8218 case -NFS4ERR_DEADSESSION:
8219 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
8220 nfs4_schedule_session_recovery(clp->cl_session,
8221 task->tk_status);
8222 break;
aa5190d0 8223 default:
0400a6b0 8224 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 8225 }
8226 return 0;
8227}
8228
fce5c838
RL		 8229static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
8230{
8231 struct nfs4_reclaim_complete_data *calldata = data;
8232 struct nfs_client *clp = calldata->clp;
8233 struct nfs4_sequence_res *res = &calldata->res.seq_res;
8234
8235 dprintk("--> %s\n", __func__);
14516c3a
TM		 8236 if (!nfs41_sequence_done(task, res))
8237 return;
fce5c838 8238
c6d01c6f 8239 trace_nfs4_reclaim_complete(clp, task->tk_status);
aa5190d0
TM		 8240 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
8241 rpc_restart_call_prepare(task);
8242 return;
8243 }
fce5c838
RL		 8244 dprintk("<-- %s\n", __func__);
8245}
8246
8247static void nfs4_free_reclaim_complete_data(void *data)
8248{
8249 struct nfs4_reclaim_complete_data *calldata = data;
8250
8251 kfree(calldata);
8252}
8253
8254static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
8255 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
8256 .rpc_call_done = nfs4_reclaim_complete_done,
8257 .rpc_release = nfs4_free_reclaim_complete_data,
8258};
8259
8260/*
8261 * Issue a global reclaim complete.
8262 */
965e9c23
TM		 8263static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
8264 struct rpc_cred *cred)
fce5c838
RL		 8265{
8266 struct nfs4_reclaim_complete_data *calldata;
8267 struct rpc_task *task;
8268 struct rpc_message msg = {
8269 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 8270 .rpc_cred = cred,
fce5c838
RL		 8271 };
8272 struct rpc_task_setup task_setup_data = {
8273 .rpc_client = clp->cl_rpcclient,
8274 .rpc_message = &msg,
8275 .callback_ops = &nfs4_reclaim_complete_call_ops,
8276 .flags = RPC_TASK_ASYNC,
8277 };
8278 int status = -ENOMEM;
8279
8280 dprintk("--> %s\n", __func__);
8535b2be 8281 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 8282 if (calldata == NULL)
8283 goto out;
8284 calldata->clp = clp;
8285 calldata->arg.one_fs = 0;
fce5c838 8286
a9c92d6b 8287 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 8288 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 8289 msg.rpc_argp = &calldata->arg;
8290 msg.rpc_resp = &calldata->res;
8291 task_setup_data.callback_data = calldata;
8292 task = rpc_run_task(&task_setup_data);
acf82b85 8293 if (IS_ERR(task)) {
fce5c838 8294 status = PTR_ERR(task);
acf82b85
DC		 8295 goto out;
8296 }
820bf85c 8297 status = rpc_wait_for_completion_task(task);
c34c32ea
AA		 8298 if (status == 0)
8299 status = task->tk_status;
fce5c838
RL		 8300 rpc_put_task(task);
8301out:
8302 dprintk("<-- %s status=%d\n", __func__, status);
8303 return status;
8304}
b1f69b75
AA		 8305
8306static void
8307nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
8308{
8309 struct nfs4_layoutget *lgp = calldata;
c31663d4 8310 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
b1f69b75
AA		 8311
8312 dprintk("--> %s\n", __func__);
7981c8a6 8313 nfs4_setup_sequence(server->nfs_client, &lgp->args.seq_args,
183d9e7b
JL		 8314 &lgp->res.seq_res, task);
8315 dprintk("<-- %s\n", __func__);
b1f69b75
AA		 8316}
8317
8318static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
8319{
8320 struct nfs4_layoutget *lgp = calldata;
183d9e7b
JL		 8321
8322 dprintk("--> %s\n", __func__);
2e80dbe7 8323 nfs41_sequence_process(task, &lgp->res.seq_res);
183d9e7b
JL		 8324 dprintk("<-- %s\n", __func__);
8325}
8326
8327static int
8328nfs4_layoutget_handle_exception(struct rpc_task *task,
8329 struct nfs4_layoutget *lgp, struct nfs4_exception *exception)
8330{
ee314c2a
TM		 8331 struct inode *inode = lgp->args.inode;
8332 struct nfs_server *server = NFS_SERVER(inode);
8333 struct pnfs_layout_hdr *lo;
e85d7ee4
TM		 8334 int nfs4err = task->tk_status;
8335 int err, status = 0;
f7db0b28 8336 LIST_HEAD(head);
b1f69b75 8337
ed7e5423 8338 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
b1f69b75 8339
e85d7ee4 8340 switch (nfs4err) {
b1f69b75 8341 case 0:
ee314c2a 8342 goto out;
7c1e6e58
PT		 8343
8344 /*
8345 * NFS4ERR_LAYOUTUNAVAILABLE means we are not supposed to use pnfs
8346 * on the file. set tk_status to -ENODATA to tell upper layer to
8347 * retry go inband.
8348 */
8349 case -NFS4ERR_LAYOUTUNAVAILABLE:
183d9e7b 8350 status = -ENODATA;
7c1e6e58 8351 goto out;
21b874c8
TM		 8352 /*
8353 * NFS4ERR_BADLAYOUT means the MDS cannot return a layout of
8354 * length lgp->args.minlength != 0 (see RFC5661 section 18.43.3).
8355 */
8356 case -NFS4ERR_BADLAYOUT:
183d9e7b
JL		 8357 status = -EOVERFLOW;
8358 goto out;
ed7e5423
BH		 8359 /*
8360 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
21b874c8
TM		 8361 * (or clients) writing to the same RAID stripe except when
8362 * the minlength argument is 0 (see RFC5661 section 18.43.3).
183d9e7b
JL		 8363 *
8364 * Treat it like we would RECALLCONFLICT -- we retry for a little
8365 * while, and then eventually give up.
ed7e5423 8366 */
b1f69b75 8367 case -NFS4ERR_LAYOUTTRYLATER:
183d9e7b
JL		 8368 if (lgp->args.minlength == 0) {
8369 status = -EOVERFLOW;
8370 goto out;
ed7e5423 8371 }
e85d7ee4
TM		 8372 status = -EBUSY;
8373 break;
183d9e7b 8374 case -NFS4ERR_RECALLCONFLICT:
183d9e7b 8375 status = -ERECALLCONFLICT;
e85d7ee4 8376 break;
26f47443
TM		 8377 case -NFS4ERR_DELEG_REVOKED:
8378 case -NFS4ERR_ADMIN_REVOKED:
ee314c2a
TM		 8379 case -NFS4ERR_EXPIRED:
8380 case -NFS4ERR_BAD_STATEID:
183d9e7b 8381 exception->timeout = 0;
ee314c2a 8382 spin_lock(&inode->i_lock);
f7db0b28
TM		 8383 lo = NFS_I(inode)->layout;
8384 /* If the open stateid was bad, then recover it. */
8385 if (!lo || test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) ||
8386 nfs4_stateid_match_other(&lgp->args.stateid,
2259f960 8387 &lgp->args.ctx->state->stateid)) {
ee314c2a 8388 spin_unlock(&inode->i_lock);
183d9e7b 8389 exception->state = lgp->args.ctx->state;
26f47443 8390 exception->stateid = &lgp->args.stateid;
2259f960
TM		 8391 break;
8392 }
f7db0b28
TM		 8393
8394 /*
8395 * Mark the bad layout state as invalid, then retry
8396 */
668f455d 8397 pnfs_mark_layout_stateid_invalid(lo, &head);
f7db0b28 8398 spin_unlock(&inode->i_lock);
1f18b82c 8399 nfs_commit_inode(inode, 0);
f7db0b28
TM		 8400 pnfs_free_lseg_list(&head);
8401 status = -EAGAIN;
8402 goto out;
b1f69b75 8403 }
183d9e7b 8404
8ac09251 8405 nfs4_sequence_free_slot(&lgp->res.seq_res);
e85d7ee4
TM		 8406 err = nfs4_handle_exception(server, nfs4err, exception);
8407 if (!status) {
8408 if (exception->retry)
8409 status = -EAGAIN;
8410 else
8411 status = err;
8412 }
ee314c2a 8413out:
b1f69b75 8414 dprintk("<-- %s\n", __func__);
183d9e7b 8415 return status;
b1f69b75
AA		 8416}
8417
8554116e
IK		 8418static size_t max_response_pages(struct nfs_server *server)
8419{
8420 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
8421 return nfs_page_array_len(0, max_resp_sz);
8422}
8423
8424static void nfs4_free_pages(struct page **pages, size_t size)
8425{
8426 int i;
8427
8428 if (!pages)
8429 return;
8430
8431 for (i = 0; i < size; i++) {
8432 if (!pages[i])
8433 break;
8434 __free_page(pages[i]);
8435 }
8436 kfree(pages);
8437}
8438
8439static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
8440{
8441 struct page **pages;
8442 int i;
8443
8444 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
8445 if (!pages) {
8446 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
8447 return NULL;
8448 }
8449
8450 for (i = 0; i < size; i++) {
8451 pages[i] = alloc_page(gfp_flags);
8452 if (!pages[i]) {
8453 dprintk("%s: failed to allocate page\n", __func__);
8454 nfs4_free_pages(pages, size);
8455 return NULL;
8456 }
8457 }
8458
8459 return pages;
8460}
8461
b1f69b75
AA		 8462static void nfs4_layoutget_release(void *calldata)
8463{
8464 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 8465 struct inode *inode = lgp->args.inode;
8466 struct nfs_server *server = NFS_SERVER(inode);
8554116e 8467 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 8468
8469 dprintk("--> %s\n", __func__);
bd171930 8470 nfs4_sequence_free_slot(&lgp->res.seq_res);
8554116e 8471 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 8472 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 8473 put_nfs_open_context(lgp->args.ctx);
8474 kfree(calldata);
8475 dprintk("<-- %s\n", __func__);
8476}
8477
8478static const struct rpc_call_ops nfs4_layoutget_call_ops = {
8479 .rpc_call_prepare = nfs4_layoutget_prepare,
8480 .rpc_call_done = nfs4_layoutget_done,
8481 .rpc_release = nfs4_layoutget_release,
8482};
8483
a0b0a6e3 8484struct pnfs_layout_segment *
183d9e7b 8485nfs4_proc_layoutget(struct nfs4_layoutget *lgp, long *timeout, gfp_t gfp_flags)
b1f69b75 8486{
a47970ff
WAA		 8487 struct inode *inode = lgp->args.inode;
8488 struct nfs_server *server = NFS_SERVER(inode);
8554116e 8489 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 8490 struct rpc_task *task;
8491 struct rpc_message msg = {
8492 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
8493 .rpc_argp = &lgp->args,
8494 .rpc_resp = &lgp->res,
6ab59344 8495 .rpc_cred = lgp->cred,
b1f69b75
AA		 8496 };
8497 struct rpc_task_setup task_setup_data = {
8498 .rpc_client = server->client,
8499 .rpc_message = &msg,
8500 .callback_ops = &nfs4_layoutget_call_ops,
8501 .callback_data = lgp,
8502 .flags = RPC_TASK_ASYNC,
8503 };
a0b0a6e3 8504 struct pnfs_layout_segment *lseg = NULL;
bc23676c
TM		 8505 struct nfs4_exception exception = {
8506 .inode = inode,
8507 .timeout = *timeout,
8508 };
b1f69b75
AA		 8509 int status = 0;
8510
8511 dprintk("--> %s\n", __func__);
8512
4bd5a980
PT		 8513 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
8514 pnfs_get_layout_hdr(NFS_I(inode)->layout);
8515
8554116e
IK		 8516 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
8517 if (!lgp->args.layout.pages) {
8518 nfs4_layoutget_release(lgp);
a0b0a6e3 8519 return ERR_PTR(-ENOMEM);
8554116e
IK		 8520 }
8521 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
8522
35124a09 8523 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 8524 lgp->res.seq_res.sr_slot = NULL;
a9c92d6b 8525 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff 8526
b1f69b75
AA		 8527 task = rpc_run_task(&task_setup_data);
8528 if (IS_ERR(task))
a0b0a6e3 8529 return ERR_CAST(task);
820bf85c 8530 status = rpc_wait_for_completion_task(task);
183d9e7b
JL		 8531 if (status == 0) {
8532 status = nfs4_layoutget_handle_exception(task, lgp, &exception);
8533 *timeout = exception.timeout;
8534 }
8535
1037e6ea
TM		 8536 trace_nfs4_layoutget(lgp->args.ctx,
8537 &lgp->args.range,
8538 &lgp->res.range,
48c9579a 8539 &lgp->res.stateid,
1037e6ea 8540 status);
183d9e7b 8541
085b7a45
WAA		 8542 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
8543 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 8544 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 8545 rpc_put_task(task);
8546 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 8547 if (status)
8548 return ERR_PTR(status);
8549 return lseg;
b1f69b75
AA		 8550}
8551
cbe82603
BH		 8552static void
8553nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
8554{
8555 struct nfs4_layoutreturn *lrp = calldata;
8556
8557 dprintk("--> %s\n", __func__);
7981c8a6 8558 nfs4_setup_sequence(lrp->clp,
d9afbd1b
TM		 8559 &lrp->args.seq_args,
8560 &lrp->res.seq_res,
8561 task);
cbe82603
BH		 8562}
8563
8564static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
8565{
8566 struct nfs4_layoutreturn *lrp = calldata;
8567 struct nfs_server *server;
8568
8569 dprintk("--> %s\n", __func__);
8570
2e80dbe7 8571 if (!nfs41_sequence_process(task, &lrp->res.seq_res))
cbe82603
BH		 8572 return;
8573
8574 server = NFS_SERVER(lrp->args.inode);
f22e5edd
TM		 8575 switch (task->tk_status) {
8576 default:
8577 task->tk_status = 0;
8578 case 0:
8579 break;
8580 case -NFS4ERR_DELAY:
8478eaa1 8581 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
f22e5edd 8582 break;
2e80dbe7 8583 nfs4_sequence_free_slot(&lrp->res.seq_res);
d00c5d43 8584 rpc_restart_call_prepare(task);
cbe82603
BH		 8585 return;
8586 }
cbe82603
BH		 8587 dprintk("<-- %s\n", __func__);
8588}
8589
8590static void nfs4_layoutreturn_release(void *calldata)
8591{
8592 struct nfs4_layoutreturn *lrp = calldata;
849b286f 8593 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 8594
8595 dprintk("--> %s\n", __func__);
2a974425 8596 pnfs_layoutreturn_free_lsegs(lo, &lrp->args.stateid, &lrp->args.range,
68f74479 8597 lrp->res.lrs_present ? &lrp->res.stateid : NULL);
2e80dbe7 8598 nfs4_sequence_free_slot(&lrp->res.seq_res);
4d796d75
TM		 8599 if (lrp->ld_private.ops && lrp->ld_private.ops->free)
8600 lrp->ld_private.ops->free(&lrp->ld_private);
2f065ddb
TM		 8601 pnfs_put_layout_hdr(lrp->args.layout);
8602 nfs_iput_and_deactive(lrp->inode);
cbe82603
BH		 8603 kfree(calldata);
8604 dprintk("<-- %s\n", __func__);
8605}
8606
8607static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
8608 .rpc_call_prepare = nfs4_layoutreturn_prepare,
8609 .rpc_call_done = nfs4_layoutreturn_done,
8610 .rpc_release = nfs4_layoutreturn_release,
8611};
8612
6c16605d 8613int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync)
cbe82603
BH		 8614{
8615 struct rpc_task *task;
8616 struct rpc_message msg = {
8617 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
8618 .rpc_argp = &lrp->args,
8619 .rpc_resp = &lrp->res,
9556000d 8620 .rpc_cred = lrp->cred,
cbe82603
BH		 8621 };
8622 struct rpc_task_setup task_setup_data = {
1771c577 8623 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
cbe82603
BH		 8624 .rpc_message = &msg,
8625 .callback_ops = &nfs4_layoutreturn_call_ops,
8626 .callback_data = lrp,
8627 };
6c16605d 8628 int status = 0;
cbe82603 8629
99ade3c7
AE		 8630 nfs4_state_protect(NFS_SERVER(lrp->args.inode)->nfs_client,
8631 NFS_SP4_MACH_CRED_PNFS_CLEANUP,
8632 &task_setup_data.rpc_client, &msg);
8633
cbe82603 8634 dprintk("--> %s\n", __func__);
5a0ec8ac
TM		 8635 if (!sync) {
8636 lrp->inode = nfs_igrab_and_active(lrp->args.inode);
8637 if (!lrp->inode) {
8638 nfs4_layoutreturn_release(lrp);
8639 return -EAGAIN;
8640 }
8641 task_setup_data.flags |= RPC_TASK_ASYNC;
8642 }
a9c92d6b 8643 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 8644 task = rpc_run_task(&task_setup_data);
8645 if (IS_ERR(task))
8646 return PTR_ERR(task);
5a0ec8ac
TM		 8647 if (sync)
8648 status = task->tk_status;
48c9579a 8649 trace_nfs4_layoutreturn(lrp->args.inode, &lrp->args.stateid, status);
cbe82603
BH		 8650 dprintk("<-- %s status=%d\n", __func__, status);
8651 rpc_put_task(task);
8652 return status;
8653}
8654
b1f69b75 8655static int
cd5875fe
TM		 8656_nfs4_proc_getdeviceinfo(struct nfs_server *server,
8657 struct pnfs_device *pdev,
8658 struct rpc_cred *cred)
b1f69b75
AA		 8659{
8660 struct nfs4_getdeviceinfo_args args = {
8661 .pdev = pdev,
4e590803
TM		 8662 .notify_types = NOTIFY_DEVICEID4_CHANGE |
8663 NOTIFY_DEVICEID4_DELETE,
b1f69b75
AA		 8664 };
8665 struct nfs4_getdeviceinfo_res res = {
8666 .pdev = pdev,
8667 };
8668 struct rpc_message msg = {
8669 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
8670 .rpc_argp = &args,
8671 .rpc_resp = &res,
cd5875fe 8672 .rpc_cred = cred,
b1f69b75
AA		 8673 };
8674 int status;
8675
8676 dprintk("--> %s\n", __func__);
7c513058 8677 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4e590803
TM		 8678 if (res.notification & ~args.notify_types)
8679 dprintk("%s: unsupported notification\n", __func__);
df52699e
TM		 8680 if (res.notification != args.notify_types)
8681 pdev->nocache = 1;
4e590803 8682
b1f69b75
AA		 8683 dprintk("<-- %s status=%d\n", __func__, status);
8684
8685 return status;
8686}
8687
cd5875fe
TM		 8688int nfs4_proc_getdeviceinfo(struct nfs_server *server,
8689 struct pnfs_device *pdev,
8690 struct rpc_cred *cred)
b1f69b75
AA		 8691{
8692 struct nfs4_exception exception = { };
8693 int err;
8694
8695 do {
8696 err = nfs4_handle_exception(server,
cd5875fe 8697 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 8698 &exception);
8699 } while (exception.retry);
8700 return err;
8701}
8702EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
8703
863a3c6c
AA		 8704static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
8705{
8706 struct nfs4_layoutcommit_data *data = calldata;
8707 struct nfs_server *server = NFS_SERVER(data->args.inode);
8708
7981c8a6 8709 nfs4_setup_sequence(server->nfs_client,
d9afbd1b
TM		 8710 &data->args.seq_args,
8711 &data->res.seq_res,
8712 task);
863a3c6c
AA		 8713}
8714
8715static void
8716nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
8717{
8718 struct nfs4_layoutcommit_data *data = calldata;
8719 struct nfs_server *server = NFS_SERVER(data->args.inode);
8720
6ba7db34 8721 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 8722 return;
8723
8724 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 8725 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
8726 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
8727 case -NFS4ERR_BADLAYOUT: /* no layout */
8728 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 8729 task->tk_status = 0;
e59d27e0 8730 case 0:
e59d27e0
TM		 8731 break;
8732 default:
8478eaa1 8733 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) {
e59d27e0
TM		 8734 rpc_restart_call_prepare(task);
8735 return;
8736 }
8737 }
863a3c6c
AA		 8738}
8739
8740static void nfs4_layoutcommit_release(void *calldata)
8741{
8742 struct nfs4_layoutcommit_data *data = calldata;
8743
db29c089 8744 pnfs_cleanup_layoutcommit(data);
d8c951c3
TM		 8745 nfs_post_op_update_inode_force_wcc(data->args.inode,
8746 data->res.fattr);
863a3c6c 8747 put_rpccred(data->cred);
472e2594 8748 nfs_iput_and_deactive(data->inode);
863a3c6c
AA		 8749 kfree(data);
8750}
8751
8752static const struct rpc_call_ops nfs4_layoutcommit_ops = {
8753 .rpc_call_prepare = nfs4_layoutcommit_prepare,
8754 .rpc_call_done = nfs4_layoutcommit_done,
8755 .rpc_release = nfs4_layoutcommit_release,
8756};
8757
8758int
ef311537 8759nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 8760{
8761 struct rpc_message msg = {
8762 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
8763 .rpc_argp = &data->args,
8764 .rpc_resp = &data->res,
8765 .rpc_cred = data->cred,
8766 };
8767 struct rpc_task_setup task_setup_data = {
8768 .task = &data->task,
8769 .rpc_client = NFS_CLIENT(data->args.inode),
8770 .rpc_message = &msg,
8771 .callback_ops = &nfs4_layoutcommit_ops,
8772 .callback_data = data,
863a3c6c
AA		 8773 };
8774 struct rpc_task *task;
8775 int status = 0;
8776
b4839ebe
KM		 8777 dprintk("NFS: initiating layoutcommit call. sync %d "
8778 "lbw: %llu inode %lu\n", sync,
863a3c6c
AA		 8779 data->args.lastbytewritten,
8780 data->args.inode->i_ino);
8781
472e2594
TM		 8782 if (!sync) {
8783 data->inode = nfs_igrab_and_active(data->args.inode);
8784 if (data->inode == NULL) {
8785 nfs4_layoutcommit_release(data);
8786 return -EAGAIN;
8787 }
8788 task_setup_data.flags = RPC_TASK_ASYNC;
8789 }
a9c92d6b 8790 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 8791 task = rpc_run_task(&task_setup_data);
8792 if (IS_ERR(task))
8793 return PTR_ERR(task);
472e2594
TM		 8794 if (sync)
8795 status = task->tk_status;
48c9579a 8796 trace_nfs4_layoutcommit(data->args.inode, &data->args.stateid, status);
863a3c6c
AA		 8797 dprintk("%s: status %d\n", __func__, status);
8798 rpc_put_task(task);
8799 return status;
8800}
fca78d6d 8801
97431204
AA		 8802/**
8803 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
8804 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
8805 */
fca78d6d
BS		 8806static int
8807_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
b1b3e136
WAA		 8808 struct nfs_fsinfo *info,
8809 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
fca78d6d
BS		 8810{
8811 struct nfs41_secinfo_no_name_args args = {
8812 .style = SECINFO_STYLE_CURRENT_FH,
8813 };
8814 struct nfs4_secinfo_res res = {
8815 .flavors = flavors,
8816 };
8817 struct rpc_message msg = {
8818 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
8819 .rpc_argp = &args,
8820 .rpc_resp = &res,
8821 };
b1b3e136 8822 struct rpc_clnt *clnt = server->client;
7cb852df 8823 struct rpc_cred *cred = NULL;
b1b3e136
WAA		 8824 int status;
8825
8826 if (use_integrity) {
8827 clnt = server->nfs_client->cl_rpcclient;
7cb852df
WAA		 8828 cred = nfs4_get_clid_cred(server->nfs_client);
8829 msg.rpc_cred = cred;
b1b3e136
WAA		 8830 }
8831
8832 dprintk("--> %s\n", __func__);
8833 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
8834 &res.seq_res, 0);
8835 dprintk("<-- %s status=%d\n", __func__, status);
8836
7cb852df
WAA		 8837 if (cred)
8838 put_rpccred(cred);
b1b3e136
WAA		 8839
8840 return status;
fca78d6d
BS		 8841}
8842
8843static int
8844nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8845 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
8846{
8847 struct nfs4_exception exception = { };
8848 int err;
8849 do {
b1b3e136
WAA		 8850 /* first try using integrity protection */
8851 err = -NFS4ERR_WRONGSEC;
8852
8853 /* try to use integrity protection with machine cred */
8854 if (_nfs4_is_integrity_protected(server->nfs_client))
8855 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8856 flavors, true);
8857
8858 /*
8859 * if unable to use integrity protection, or SECINFO with
8860 * integrity protection returns NFS4ERR_WRONGSEC (which is
8861 * disallowed by spec, but exists in deployed servers) use
8862 * the current filesystem's rpc_client and the user cred.
8863 */
8864 if (err == -NFS4ERR_WRONGSEC)
8865 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8866 flavors, false);
8867
fca78d6d
BS		 8868 switch (err) {
8869 case 0:
8870 case -NFS4ERR_WRONGSEC:
78b19bae 8871 case -ENOTSUPP:
05e9cfb4 8872 goto out;
fca78d6d
BS		 8873 default:
8874 err = nfs4_handle_exception(server, err, &exception);
8875 }
8876 } while (exception.retry);
05e9cfb4 8877out:
fca78d6d
BS		 8878 return err;
8879}
8880
8881static int
8882nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
8883 struct nfs_fsinfo *info)
8884{
8885 int err;
8886 struct page *page;
367156d9 8887 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
fca78d6d 8888 struct nfs4_secinfo_flavors *flavors;
58a8cf12
WAA		 8889 struct nfs4_secinfo4 *secinfo;
8890 int i;
fca78d6d
BS		 8891
8892 page = alloc_page(GFP_KERNEL);
8893 if (!page) {
8894 err = -ENOMEM;
8895 goto out;
8896 }
8897
8898 flavors = page_address(page);
8899 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
8900
8901 /*
8902 * Fall back on "guess and check" method if
8903 * the server doesn't support SECINFO_NO_NAME
8904 */
78b19bae 8905 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
fca78d6d
BS		 8906 err = nfs4_find_root_sec(server, fhandle, info);
8907 goto out_freepage;
8908 }
8909 if (err)
8910 goto out_freepage;
8911
58a8cf12
WAA		 8912 for (i = 0; i < flavors->num_flavors; i++) {
8913 secinfo = &flavors->flavors[i];
8914
8915 switch (secinfo->flavor) {
8916 case RPC_AUTH_NULL:
8917 case RPC_AUTH_UNIX:
8918 case RPC_AUTH_GSS:
8919 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
8920 &secinfo->flavor_info);
8921 break;
8922 default:
8923 flavor = RPC_AUTH_MAXFLAVOR;
8924 break;
8925 }
8926
4d4b69dd
WAA		 8927 if (!nfs_auth_info_match(&server->auth_info, flavor))
8928 flavor = RPC_AUTH_MAXFLAVOR;
8929
58a8cf12
WAA		 8930 if (flavor != RPC_AUTH_MAXFLAVOR) {
8931 err = nfs4_lookup_root_sec(server, fhandle,
8932 info, flavor);
8933 if (!err)
8934 break;
8935 }
8936 }
8937
8938 if (flavor == RPC_AUTH_MAXFLAVOR)
8939 err = -EPERM;
fca78d6d
BS		 8940
8941out_freepage:
8942 put_page(page);
8943 if (err == -EACCES)
8944 return -EPERM;
8945out:
8946 return err;
8947}
1cab0652 8948
ab7cb0df
TM		 8949static int _nfs41_test_stateid(struct nfs_server *server,
8950 nfs4_stateid *stateid,
8951 struct rpc_cred *cred)
7d974794
BS		 8952{
8953 int status;
8954 struct nfs41_test_stateid_args args = {
1cab0652 8955 .stateid = stateid,
7d974794
BS		 8956 };
8957 struct nfs41_test_stateid_res res;
8958 struct rpc_message msg = {
8959 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
8960 .rpc_argp = &args,
8961 .rpc_resp = &res,
ab7cb0df 8962 .rpc_cred = cred,
7d974794 8963 };
3787d506
WAA		 8964 struct rpc_clnt *rpc_client = server->client;
8965
8966 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8967 &rpc_client, &msg);
1cab0652 8968
38527b15 8969 dprintk("NFS call test_stateid %p\n", stateid);
a9c92d6b 8970 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 8971 nfs4_set_sequence_privileged(&args.seq_args);
3787d506 8972 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8fe72bac 8973 &args.seq_args, &res.seq_res);
38527b15
CL		 8974 if (status != NFS_OK) {
8975 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 8976 return status;
38527b15
CL		 8977 }
8978 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 8979 return -res.status;
7d974794
BS		 8980}
8981
43912bbb
TM		 8982static void nfs4_handle_delay_or_session_error(struct nfs_server *server,
8983 int err, struct nfs4_exception *exception)
8984{
8985 exception->retry = 0;
8986 switch(err) {
8987 case -NFS4ERR_DELAY:
76e8a1bd 8988 case -NFS4ERR_RETRY_UNCACHED_REP:
43912bbb
TM		 8989 nfs4_handle_exception(server, err, exception);
8990 break;
8991 case -NFS4ERR_BADSESSION:
8992 case -NFS4ERR_BADSLOT:
8993 case -NFS4ERR_BAD_HIGH_SLOT:
8994 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
8995 case -NFS4ERR_DEADSESSION:
8996 nfs4_do_handle_exception(server, err, exception);
8997 }
8998}
8999
38527b15
CL		 9000/**
9001 * nfs41_test_stateid - perform a TEST_STATEID operation
9002 *
9003 * @server: server / transport on which to perform the operation
9004 * @stateid: state ID to test
ab7cb0df 9005 * @cred: credential
38527b15
CL		 9006 *
9007 * Returns NFS_OK if the server recognizes that "stateid" is valid.
9008 * Otherwise a negative NFS4ERR value is returned if the operation
9009 * failed or the state ID is not currently valid.
9010 */
ab7cb0df
TM		 9011static int nfs41_test_stateid(struct nfs_server *server,
9012 nfs4_stateid *stateid,
9013 struct rpc_cred *cred)
7d974794
BS		 9014{
9015 struct nfs4_exception exception = { };
9016 int err;
9017 do {
ab7cb0df 9018 err = _nfs41_test_stateid(server, stateid, cred);
43912bbb 9019 nfs4_handle_delay_or_session_error(server, err, &exception);
7d974794
BS		 9020 } while (exception.retry);
9021 return err;
9022}
9aeda35f 9023
7c1d5fae
TM		 9024struct nfs_free_stateid_data {
9025 struct nfs_server *server;
9026 struct nfs41_free_stateid_args args;
9aeda35f 9027 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 9028};
9029
9030static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
9031{
9032 struct nfs_free_stateid_data *data = calldata;
7981c8a6 9033 nfs4_setup_sequence(data->server->nfs_client,
7c1d5fae
TM		 9034 &data->args.seq_args,
9035 &data->res.seq_res,
9036 task);
9037}
9038
9039static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
9040{
9041 struct nfs_free_stateid_data *data = calldata;
9042
9043 nfs41_sequence_done(task, &data->res.seq_res);
9044
9045 switch (task->tk_status) {
9046 case -NFS4ERR_DELAY:
8478eaa1 9047 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN)
7c1d5fae
TM		 9048 rpc_restart_call_prepare(task);
9049 }
9050}
9051
9052static void nfs41_free_stateid_release(void *calldata)
9053{
9054 kfree(calldata);
9055}
9056
17f26b12 9057static const struct rpc_call_ops nfs41_free_stateid_ops = {
7c1d5fae
TM		 9058 .rpc_call_prepare = nfs41_free_stateid_prepare,
9059 .rpc_call_done = nfs41_free_stateid_done,
9060 .rpc_release = nfs41_free_stateid_release,
9061};
9062
9063static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
f0b0bf88 9064 const nfs4_stateid *stateid,
ab7cb0df 9065 struct rpc_cred *cred,
7c1d5fae
TM		 9066 bool privileged)
9067{
9aeda35f
BS		 9068 struct rpc_message msg = {
9069 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 9070 .rpc_cred = cred,
9aeda35f 9071 };
7c1d5fae
TM		 9072 struct rpc_task_setup task_setup = {
9073 .rpc_client = server->client,
9074 .rpc_message = &msg,
9075 .callback_ops = &nfs41_free_stateid_ops,
9076 .flags = RPC_TASK_ASYNC,
9077 };
9078 struct nfs_free_stateid_data *data;
9aeda35f 9079
3787d506
WAA		 9080 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
9081 &task_setup.rpc_client, &msg);
9082
38527b15 9083 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 9084 data = kmalloc(sizeof(*data), GFP_NOFS);
9085 if (!data)
9086 return ERR_PTR(-ENOMEM);
9087 data->server = server;
9088 nfs4_stateid_copy(&data->args.stateid, stateid);
9089
9090 task_setup.callback_data = data;
9091
9092 msg.rpc_argp = &data->args;
9093 msg.rpc_resp = &data->res;
76e8a1bd 9094 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
7c1d5fae
TM		 9095 if (privileged)
9096 nfs4_set_sequence_privileged(&data->args.seq_args);
9097
9098 return rpc_run_task(&task_setup);
9aeda35f
BS		 9099}
9100
38527b15
CL		 9101/**
9102 * nfs41_free_stateid - perform a FREE_STATEID operation
9103 *
9104 * @server: server / transport on which to perform the operation
9105 * @stateid: state ID to release
ab7cb0df 9106 * @cred: credential
f0b0bf88 9107 * @is_recovery: set to true if this call needs to be privileged
38527b15 9108 *
f0b0bf88 9109 * Note: this function is always asynchronous.
38527b15 9110 */
ab7cb0df 9111static int nfs41_free_stateid(struct nfs_server *server,
f0b0bf88
TM		 9112 const nfs4_stateid *stateid,
9113 struct rpc_cred *cred,
9114 bool is_recovery)
9aeda35f 9115{
7c1d5fae 9116 struct rpc_task *task;
7c1d5fae 9117
f0b0bf88 9118 task = _nfs41_free_stateid(server, stateid, cred, is_recovery);
7c1d5fae
TM		 9119 if (IS_ERR(task))
9120 return PTR_ERR(task);
7c1d5fae 9121 rpc_put_task(task);
f0b0bf88 9122 return 0;
9aeda35f 9123}
36281caa 9124
f1cdae87
JL		 9125static void
9126nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
c8b2d0bf 9127{
ab7cb0df 9128 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 9129
f0b0bf88 9130 nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf 9131 nfs4_free_lock_state(server, lsp);
c8b2d0bf
TM		 9132}
9133
36281caa
TM		 9134static bool nfs41_match_stateid(const nfs4_stateid *s1,
9135 const nfs4_stateid *s2)
9136{
93b717fd
TM		 9137 if (s1->type != s2->type)
9138 return false;
9139
2d2f24ad 9140 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 9141 return false;
9142
2d2f24ad 9143 if (s1->seqid == s2->seqid)
36281caa 9144 return true;
36281caa 9145
045c5519 9146 return s1->seqid == 0 || s2->seqid == 0;
36281caa
TM		 9147}
9148
557134a3
AA		 9149#endif /* CONFIG_NFS_V4_1 */
9150
36281caa
TM		 9151static bool nfs4_match_stateid(const nfs4_stateid *s1,
9152 const nfs4_stateid *s2)
9153{
f597c537 9154 return nfs4_stateid_match(s1, s2);
36281caa
TM		 9155}
9156
9157
17280175 9158static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 9159 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 9160 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 9161 .recover_open = nfs4_open_reclaim,
9162 .recover_lock = nfs4_lock_reclaim,
591d71cb 9163 .establish_clid = nfs4_init_clientid,
05f4c350 9164 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 9165};
9166
591d71cb 9167#if defined(CONFIG_NFS_V4_1)
17280175 9168static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 9169 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
9170 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
9171 .recover_open = nfs4_open_reclaim,
9172 .recover_lock = nfs4_lock_reclaim,
4d643d1d 9173 .establish_clid = nfs41_init_clientid,
fce5c838 9174 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 9175 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 9176};
9177#endif /* CONFIG_NFS_V4_1 */
9178
17280175 9179static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 9180 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
9181 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
4dfd4f7a 9182 .recover_open = nfs40_open_expired,
591d71cb
AA		 9183 .recover_lock = nfs4_lock_expired,
9184 .establish_clid = nfs4_init_clientid,
9185};
9186
9187#if defined(CONFIG_NFS_V4_1)
17280175 9188static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 9189 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 9190 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 9191 .recover_open = nfs41_open_expired,
9192 .recover_lock = nfs41_lock_expired,
4d643d1d 9193 .establish_clid = nfs41_init_clientid,
1da177e4 9194};
591d71cb 9195#endif /* CONFIG_NFS_V4_1 */
1da177e4 9196
17280175 9197static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 9198 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 9199 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 9200 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 9201};
9202
9203#if defined(CONFIG_NFS_V4_1)
17280175 9204static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 9205 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 9206 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 9207 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 9208};
9209#endif
9210
ec011fe8 9211static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
b03d735b 9212 .get_locations = _nfs40_proc_get_locations,
44c99933 9213 .fsid_present = _nfs40_proc_fsid_present,
ec011fe8
CL		 9214};
9215
9216#if defined(CONFIG_NFS_V4_1)
9217static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
b03d735b 9218 .get_locations = _nfs41_proc_get_locations,
44c99933 9219 .fsid_present = _nfs41_proc_fsid_present,
ec011fe8
CL		 9220};
9221#endif /* CONFIG_NFS_V4_1 */
9222
97dc1359
TM		 9223static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
9224 .minor_version = 0,
39c6daae
TM		 9225 .init_caps = NFS_CAP_READDIRPLUS
9226 | NFS_CAP_ATOMIC_OPEN
39c6daae 9227 | NFS_CAP_POSIX_LOCK,
abf79bb3
CL		 9228 .init_client = nfs40_init_client,
9229 .shutdown_client = nfs40_shutdown_client,
36281caa 9230 .match_stateid = nfs4_match_stateid,
fca78d6d 9231 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 9232 .free_lock_state = nfs4_release_lockowner,
45870d69 9233 .test_and_free_expired = nfs40_test_and_free_expired_stateid,
63f5f796 9234 .alloc_seqid = nfs_alloc_seqid,
9915ea7e 9235 .call_sync_ops = &nfs40_call_sync_ops,
c48f4f35
TM		 9236 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
9237 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
9238 .state_renewal_ops = &nfs40_state_renewal_ops,
ec011fe8 9239 .mig_recovery_ops = &nfs40_mig_recovery_ops,
97dc1359
TM		 9240};
9241
9242#if defined(CONFIG_NFS_V4_1)
63f5f796
TM		 9243static struct nfs_seqid *
9244nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2)
9245{
9246 return NULL;
9247}
9248
97dc1359
TM		 9249static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
9250 .minor_version = 1,
39c6daae
TM		 9251 .init_caps = NFS_CAP_READDIRPLUS
9252 | NFS_CAP_ATOMIC_OPEN
3b66486c 9253 | NFS_CAP_POSIX_LOCK
49f9a0fa 9254 | NFS_CAP_STATEID_NFSV41
e983120e 9255 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 9256 .init_client = nfs41_init_client,
9257 .shutdown_client = nfs41_shutdown_client,
36281caa 9258 .match_stateid = nfs41_match_stateid,
fca78d6d 9259 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 9260 .free_lock_state = nfs41_free_lock_state,
45870d69 9261 .test_and_free_expired = nfs41_test_and_free_expired_stateid,
63f5f796 9262 .alloc_seqid = nfs_alloc_no_seqid,
04fa2c6b 9263 .session_trunk = nfs4_test_session_trunk,
9915ea7e 9264 .call_sync_ops = &nfs41_call_sync_ops,
c48f4f35
TM		 9265 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
9266 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
9267 .state_renewal_ops = &nfs41_state_renewal_ops,
ec011fe8 9268 .mig_recovery_ops = &nfs41_mig_recovery_ops,
97dc1359
TM		 9269};
9270#endif
9271
42c2c424
SD		 9272#if defined(CONFIG_NFS_V4_2)
9273static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
9274 .minor_version = 2,
7017310a
BS		 9275 .init_caps = NFS_CAP_READDIRPLUS
9276 | NFS_CAP_ATOMIC_OPEN
7017310a
BS		 9277 | NFS_CAP_POSIX_LOCK
9278 | NFS_CAP_STATEID_NFSV41
e983120e 9279 | NFS_CAP_ATOMIC_OPEN_V1
f4ac1674 9280 | NFS_CAP_ALLOCATE
2e72448b 9281 | NFS_CAP_COPY
624bd5b7 9282 | NFS_CAP_DEALLOCATE
6c5a0d89 9283 | NFS_CAP_SEEK
e5341f3a
PT		 9284 | NFS_CAP_LAYOUTSTATS
9285 | NFS_CAP_CLONE,
abf79bb3
CL		 9286 .init_client = nfs41_init_client,
9287 .shutdown_client = nfs41_shutdown_client,
42c2c424
SD		 9288 .match_stateid = nfs41_match_stateid,
9289 .find_root_sec = nfs41_find_root_sec,
7017310a 9290 .free_lock_state = nfs41_free_lock_state,
9915ea7e 9291 .call_sync_ops = &nfs41_call_sync_ops,
45870d69 9292 .test_and_free_expired = nfs41_test_and_free_expired_stateid,
63f5f796 9293 .alloc_seqid = nfs_alloc_no_seqid,
04fa2c6b 9294 .session_trunk = nfs4_test_session_trunk,
42c2c424
SD		 9295 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
9296 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
9297 .state_renewal_ops = &nfs41_state_renewal_ops,
18e3b739 9298 .mig_recovery_ops = &nfs41_mig_recovery_ops,
42c2c424
SD		 9299};
9300#endif
9301
97dc1359
TM		 9302const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
9303 [0] = &nfs_v4_0_minor_ops,
9304#if defined(CONFIG_NFS_V4_1)
9305 [1] = &nfs_v4_1_minor_ops,
9306#endif
42c2c424
SD		 9307#if defined(CONFIG_NFS_V4_2)
9308 [2] = &nfs_v4_2_minor_ops,
9309#endif
97dc1359
TM		 9310};
9311
13997823 9312static ssize_t nfs4_listxattr(struct dentry *dentry, char *list, size_t size)
c4803c49
AG		 9313{
9314 ssize_t error, error2;
9315
9316 error = generic_listxattr(dentry, list, size);
9317 if (error < 0)
9318 return error;
9319 if (list) {
9320 list += error;
9321 size -= error;
9322 }
9323
9324 error2 = nfs4_listxattr_nfs4_label(d_inode(dentry), list, size);
9325 if (error2 < 0)
9326 return error2;
9327 return error + error2;
9328}
9329
17f26b12 9330static const struct inode_operations nfs4_dir_inode_operations = {
73a79706
BS		 9331 .create = nfs_create,
9332 .lookup = nfs_lookup,
9333 .atomic_open = nfs_atomic_open,
9334 .link = nfs_link,
9335 .unlink = nfs_unlink,
9336 .symlink = nfs_symlink,
9337 .mkdir = nfs_mkdir,
9338 .rmdir = nfs_rmdir,
9339 .mknod = nfs_mknod,
9340 .rename = nfs_rename,
9341 .permission = nfs_permission,
9342 .getattr = nfs_getattr,
9343 .setattr = nfs_setattr,
c4803c49 9344 .listxattr = nfs4_listxattr,
73a79706
BS		 9345};
9346
92e1d5be 9347static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 9348 .permission = nfs_permission,
9349 .getattr = nfs_getattr,
9350 .setattr = nfs_setattr,
c4803c49 9351 .listxattr = nfs4_listxattr,
6b3b5496
BF		 9352};
9353
509de811 9354const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 9355 .version = 4, /* protocol version */
9356 .dentry_ops = &nfs4_dentry_operations,
9357 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 9358 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 9359 .file_ops = &nfs4_file_operations,
1da177e4 9360 .getroot = nfs4_proc_get_root,
281cad46 9361 .submount = nfs4_submount,
ff9099f2 9362 .try_mount = nfs4_try_mount,
1da177e4
LT		 9363 .getattr = nfs4_proc_getattr,
9364 .setattr = nfs4_proc_setattr,
9365 .lookup = nfs4_proc_lookup,
5b5faaf6 9366 .lookupp = nfs4_proc_lookupp,
1da177e4
LT		 9367 .access = nfs4_proc_access,
9368 .readlink = nfs4_proc_readlink,
1da177e4
LT		 9369 .create = nfs4_proc_create,
9370 .remove = nfs4_proc_remove,
9371 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 9372 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4 9373 .unlink_done = nfs4_proc_unlink_done,
d3d4152a 9374 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 9375 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 9376 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 9377 .link = nfs4_proc_link,
9378 .symlink = nfs4_proc_symlink,
9379 .mkdir = nfs4_proc_mkdir,
9380 .rmdir = nfs4_proc_remove,
9381 .readdir = nfs4_proc_readdir,
9382 .mknod = nfs4_proc_mknod,
9383 .statfs = nfs4_proc_statfs,
9384 .fsinfo = nfs4_proc_fsinfo,
9385 .pathconf = nfs4_proc_pathconf,
e9326dca 9386 .set_capabilities = nfs4_server_capabilities,
1da177e4 9387 .decode_dirent = nfs4_decode_dirent,
a4cdda59 9388 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
1da177e4 9389 .read_setup = nfs4_proc_read_setup,
ec06c096 9390 .read_done = nfs4_read_done,
1da177e4 9391 .write_setup = nfs4_proc_write_setup,
788e7a89 9392 .write_done = nfs4_write_done,
1da177e4 9393 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 9394 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 9395 .commit_done = nfs4_commit_done,
1da177e4 9396 .lock = nfs4_proc_lock,
e50a1c2e 9397 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 9398 .close_context = nfs4_close_context,
2b484297 9399 .open_context = nfs4_atomic_open,
011e2a7f 9400 .have_delegation = nfs4_have_delegation,
57ec14c5 9401 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 9402 .alloc_client = nfs4_alloc_client,
45a52a02 9403 .init_client = nfs4_init_client,
cdb7eced 9404 .free_client = nfs4_free_client,
1179acc6
BS		 9405 .create_server = nfs4_create_server,
9406 .clone_server = nfs_clone_server,
1da177e4
LT		 9407};
9408
64c2ce8b 9409static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
98e9cb57 9410 .name = XATTR_NAME_NFSV4_ACL,
64c2ce8b
AK		 9411 .list = nfs4_xattr_list_nfs4_acl,
9412 .get = nfs4_xattr_get_nfs4_acl,
9413 .set = nfs4_xattr_set_nfs4_acl,
9414};
9415
9416const struct xattr_handler *nfs4_xattr_handlers[] = {
9417 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 9418#ifdef CONFIG_NFS_V4_SECURITY_LABEL
9419 &nfs4_xattr_nfs4_label_handler,
9420#endif
64c2ce8b
AK		 9421 NULL
9422};
9423
1da177e4
LT		 9424/*
9425 * Local variables:
9426 * c-basic-offset: 8
9427 * End:
9428 */
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