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Merge remote-tracking branches 'asoc/fix/dpcm', 'asoc/fix/imx', 'asoc/fix/msm8916...
[mirror_ubuntu-artful-kernel.git] / fs / nfs / nfs4proc.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
1da177e4
LT		 39#include <linux/delay.h>
40#include <linux/errno.h>
41#include <linux/string.h>
652f89f6
TM		 42#include <linux/ratelimit.h>
43#include <linux/printk.h>
5a0e3ad6 44#include <linux/slab.h>
1da177e4
LT		 45#include <linux/sunrpc/clnt.h>
46#include <linux/nfs.h>
47#include <linux/nfs4.h>
48#include <linux/nfs_fs.h>
49#include <linux/nfs_page.h>
9b7160c5 50#include <linux/nfs_mount.h>
1da177e4 51#include <linux/namei.h>
02a913a7 52#include <linux/mount.h>
99fe60d0 53#include <linux/module.h>
64c2ce8b 54#include <linux/xattr.h>
c7a360b0 55#include <linux/utsname.h>
d310310c 56#include <linux/freezer.h>
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;
1e6f2095 2239 u32 mask, flags;
6168f62c
WAA		 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 */
1e6f2095
AS		 2253 if (S_ISDIR(state->inode->i_mode))
2254 mask = NFS4_ACCESS_LOOKUP;
2255 else
2256 mask = NFS4_ACCESS_EXECUTE;
f3792d63 2257 } else if ((fmode & FMODE_READ) && !opendata->file_created)
1e6f2095 2258 mask = NFS4_ACCESS_READ;
6168f62c
WAA		 2259
2260 cache.cred = cred;
2261 cache.jiffies = jiffies;
2262 nfs_access_set_mask(&cache, opendata->o_res.access_result);
2263 nfs_access_add_cache(state->inode, &cache);
2264
1e6f2095
AS		 2265 flags = NFS4_ACCESS_READ | NFS4_ACCESS_EXECUTE | NFS4_ACCESS_LOOKUP;
2266 if ((mask & ~cache.mask & flags) == 0)
6168f62c
WAA		 2267 return 0;
2268
998f40b5 2269 return -EACCES;
6168f62c
WAA		 2270}
2271
b257957e
AB		 2272/*
2273 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2274 */
2275static int _nfs4_proc_open(struct nfs4_opendata *data)
2276{
2b0143b5 2277 struct inode *dir = d_inode(data->dir);
b257957e
AB		 2278 struct nfs_server *server = NFS_SERVER(dir);
2279 struct nfs_openargs *o_arg = &data->o_arg;
2280 struct nfs_openres *o_res = &data->o_res;
2281 int status;
2282
2283 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 2284 if (!data->rpc_done)
2285 return status;
2286 if (status != 0) {
2287 if (status == -NFS4ERR_BADNAME &&
2288 !(o_arg->open_flags & O_CREAT))
2289 return -ENOENT;
24ac23ab 2290 return status;
08ef7bd3 2291 }
24ac23ab 2292
6926afd1
TM		 2293 nfs_fattr_map_and_free_names(server, &data->f_attr);
2294
5bc2afc2 2295 if (o_arg->open_flags & O_CREAT) {
5bc2afc2 2296 if (o_arg->open_flags & O_EXCL)
a7a3b1e9 2297 data->file_created = true;
5bc2afc2 2298 else if (o_res->cinfo.before != o_res->cinfo.after)
a7a3b1e9 2299 data->file_created = true;
2dfc6173 2300 if (data->file_created || dir->i_version != o_res->cinfo.after)
d3129ef6
TM		 2301 update_changeattr(dir, &o_res->cinfo,
2302 o_res->f_attr->time_start);
5bc2afc2 2303 }
0df5dd4a
TM		 2304 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2305 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 2306 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 2307 status = _nfs4_proc_open_confirm(data);
1da177e4 2308 if (status != 0)
24ac23ab 2309 return status;
1da177e4 2310 }
56e0d71e
TM		 2311 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR)) {
2312 nfs4_sequence_free_slot(&o_res->seq_res);
8935ef66 2313 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
56e0d71e 2314 }
24ac23ab 2315 return 0;
1da177e4
LT		 2316}
2317
1da177e4
LT		 2318/*
2319 * OPEN_EXPIRED:
2320 * reclaim state on the server after a network partition.
2321 * Assumes caller holds the appropriate lock
2322 */
539cd03a 2323static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 2324{
e56e0b78 2325 struct nfs4_opendata *opendata;
864472e9 2326 int ret;
1da177e4 2327
4a1c0893 2328 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 2329 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 2330 if (IS_ERR(opendata))
2331 return PTR_ERR(opendata);
864472e9 2332 ret = nfs4_open_recover(opendata, state);
35d05778 2333 if (ret == -ESTALE)
3d4ff43d 2334 d_drop(ctx->dentry);
c6d00e63 2335 nfs4_opendata_put(opendata);
864472e9 2336 return ret;
1da177e4
LT		 2337}
2338
a9ed2e25 2339static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 2340{
539cd03a 2341 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 2342 struct nfs4_exception exception = { };
2343 int err;
2344
2345 do {
539cd03a 2346 err = _nfs4_open_expired(ctx, state);
42113a75 2347 trace_nfs4_open_expired(ctx, 0, err);
49f9a0fa
TM		 2348 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2349 continue;
a9ed2e25
TM		 2350 switch (err) {
2351 default:
2352 goto out;
2353 case -NFS4ERR_GRACE:
2354 case -NFS4ERR_DELAY:
2355 nfs4_handle_exception(server, err, &exception);
2356 err = 0;
2357 }
202b50dc 2358 } while (exception.retry);
a9ed2e25 2359out:
202b50dc
TM		 2360 return err;
2361}
2362
1da177e4
LT		 2363static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2364{
1da177e4 2365 struct nfs_open_context *ctx;
864472e9 2366 int ret;
1da177e4 2367
864472e9
TM		 2368 ctx = nfs4_state_find_open_context(state);
2369 if (IS_ERR(ctx))
91876b13 2370 return -EAGAIN;
539cd03a 2371 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 2372 put_nfs_open_context(ctx);
2373 return ret;
1da177e4
LT		 2374}
2375
41020b67
TM		 2376static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state,
2377 const nfs4_stateid *stateid)
4dfd4f7a 2378{
41020b67 2379 nfs_remove_bad_delegation(state->inode, stateid);
4dfd4f7a
TM		 2380 write_seqlock(&state->seqlock);
2381 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2382 write_sequnlock(&state->seqlock);
2383 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2384}
2385
2386static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
2387{
2388 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
41020b67 2389 nfs_finish_clear_delegation_stateid(state, NULL);
4dfd4f7a
TM		 2390}
2391
2392static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2393{
2394 /* NFSv4.0 doesn't allow for delegation recovery on open expire */
2395 nfs40_clear_delegation_stateid(state);
2396 return nfs4_open_expired(sp, state);
2397}
2398
45870d69
TM		 2399static int nfs40_test_and_free_expired_stateid(struct nfs_server *server,
2400 nfs4_stateid *stateid,
2401 struct rpc_cred *cred)
2402{
2403 return -NFS4ERR_BAD_STATEID;
2404}
2405
f062eb6c 2406#if defined(CONFIG_NFS_V4_1)
4586f6e2
TM		 2407static int nfs41_test_and_free_expired_stateid(struct nfs_server *server,
2408 nfs4_stateid *stateid,
2409 struct rpc_cred *cred)
2410{
2411 int status;
2412
f7a62ada
TM		 2413 switch (stateid->type) {
2414 default:
2415 break;
2416 case NFS4_INVALID_STATEID_TYPE:
2417 case NFS4_SPECIAL_STATEID_TYPE:
2418 return -NFS4ERR_BAD_STATEID;
2419 case NFS4_REVOKED_STATEID_TYPE:
2420 goto out_free;
2421 }
4586f6e2 2422
f7a62ada 2423 status = nfs41_test_stateid(server, stateid, cred);
4586f6e2
TM		 2424 switch (status) {
2425 case -NFS4ERR_EXPIRED:
2426 case -NFS4ERR_ADMIN_REVOKED:
2427 case -NFS4ERR_DELEG_REVOKED:
f7a62ada
TM		 2428 break;
2429 default:
4586f6e2
TM		 2430 return status;
2431 }
f7a62ada
TM		 2432out_free:
2433 /* Ack the revoked state to the server */
f0b0bf88 2434 nfs41_free_stateid(server, stateid, cred, true);
f7a62ada 2435 return -NFS4ERR_EXPIRED;
4586f6e2
TM		 2436}
2437
0c116cad 2438static void nfs41_check_delegation_stateid(struct nfs4_state *state)
f062eb6c 2439{
f062eb6c 2440 struct nfs_server *server = NFS_SERVER(state->inode);
0c116cad 2441 nfs4_stateid stateid;
ab7cb0df 2442 struct nfs_delegation *delegation;
0c116cad
TM		 2443 struct rpc_cred *cred;
2444 int status;
3e60ffdd 2445
ab7cb0df
TM		 2446 /* Get the delegation credential for use by test/free_stateid */
2447 rcu_read_lock();
2448 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
0c116cad 2449 if (delegation == NULL) {
ab7cb0df 2450 rcu_read_unlock();
0c116cad
TM		 2451 return;
2452 }
2453
2454 nfs4_stateid_copy(&stateid, &delegation->stateid);
0e3d3e5d
OK		 2455 if (test_bit(NFS_DELEGATION_REVOKED, &delegation->flags) ||
2456 !test_and_clear_bit(NFS_DELEGATION_TEST_EXPIRED,
2457 &delegation->flags)) {
4c8e5447 2458 rcu_read_unlock();
41020b67 2459 nfs_finish_clear_delegation_stateid(state, &stateid);
4c8e5447
TM		 2460 return;
2461 }
0c116cad 2462
0c116cad
TM		 2463 cred = get_rpccred(delegation->cred);
2464 rcu_read_unlock();
4586f6e2 2465 status = nfs41_test_and_free_expired_stateid(server, &stateid, cred);
0c116cad 2466 trace_nfs4_test_delegation_stateid(state, NULL, status);
f7a62ada 2467 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID)
41020b67 2468 nfs_finish_clear_delegation_stateid(state, &stateid);
ab7cb0df 2469
0c116cad 2470 put_rpccred(cred);
3e60ffdd
CL		 2471}
2472
c5896fc8
TM		 2473/**
2474 * nfs41_check_expired_locks - possibly free a lock stateid
2475 *
2476 * @state: NFSv4 state for an inode
2477 *
2478 * Returns NFS_OK if recovery for this stateid is now finished.
2479 * Otherwise a negative NFS4ERR value is returned.
2480 */
2481static int nfs41_check_expired_locks(struct nfs4_state *state)
2482{
2483 int status, ret = NFS_OK;
d75a6a0e 2484 struct nfs4_lock_state *lsp, *prev = NULL;
c5896fc8
TM		 2485 struct nfs_server *server = NFS_SERVER(state->inode);
2486
2487 if (!test_bit(LK_STATE_IN_USE, &state->flags))
2488 goto out;
d75a6a0e
BC		 2489
2490 spin_lock(&state->state_lock);
c5896fc8
TM		 2491 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
2492 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
2493 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
2494
d75a6a0e
BC		 2495 atomic_inc(&lsp->ls_count);
2496 spin_unlock(&state->state_lock);
2497
2498 nfs4_put_lock_state(prev);
2499 prev = lsp;
2500
c5896fc8
TM		 2501 status = nfs41_test_and_free_expired_stateid(server,
2502 &lsp->ls_stateid,
2503 cred);
2504 trace_nfs4_test_lock_stateid(state, lsp, status);
2505 if (status == -NFS4ERR_EXPIRED ||
2506 status == -NFS4ERR_BAD_STATEID) {
2507 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
67dd4830 2508 lsp->ls_stateid.type = NFS4_INVALID_STATEID_TYPE;
c5896fc8
TM		 2509 if (!recover_lost_locks)
2510 set_bit(NFS_LOCK_LOST, &lsp->ls_flags);
2511 } else if (status != NFS_OK) {
2512 ret = status;
d75a6a0e
BC		 2513 nfs4_put_lock_state(prev);
2514 goto out;
c5896fc8 2515 }
d75a6a0e 2516 spin_lock(&state->state_lock);
c5896fc8 2517 }
d75a6a0e
BC		 2518 }
2519 spin_unlock(&state->state_lock);
2520 nfs4_put_lock_state(prev);
c5896fc8
TM		 2521out:
2522 return ret;
2523}
2524
3e60ffdd
CL		 2525/**
2526 * nfs41_check_open_stateid - possibly free an open stateid
2527 *
2528 * @state: NFSv4 state for an inode
2529 *
2530 * Returns NFS_OK if recovery for this stateid is now finished.
2531 * Otherwise a negative NFS4ERR value is returned.
2532 */
2533static int nfs41_check_open_stateid(struct nfs4_state *state)
2534{
2535 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 2536 nfs4_stateid *stateid = &state->open_stateid;
ab7cb0df 2537 struct rpc_cred *cred = state->owner->so_cred;
3e60ffdd
CL		 2538 int status;
2539
b134fc4a 2540 if (test_bit(NFS_OPEN_STATE, &state->flags) == 0) {
8a64c4ef
TM		 2541 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) {
2542 if (nfs4_have_delegation(state->inode, state->state))
2543 return NFS_OK;
2544 return -NFS4ERR_OPENMODE;
2545 }
3e60ffdd 2546 return -NFS4ERR_BAD_STATEID;
b134fc4a 2547 }
4586f6e2 2548 status = nfs41_test_and_free_expired_stateid(server, stateid, cred);
08cb47fa 2549 trace_nfs4_test_open_stateid(state, NULL, status);
f7a62ada 2550 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID) {
3e60ffdd
CL		 2551 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2552 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2553 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 2554 clear_bit(NFS_OPEN_STATE, &state->flags);
67dd4830 2555 stateid->type = NFS4_INVALID_STATEID_TYPE;
b01dd1d8 2556 }
8a64c4ef
TM		 2557 if (status != NFS_OK)
2558 return status;
2559 if (nfs_open_stateid_recover_openmode(state))
2560 return -NFS4ERR_OPENMODE;
2561 return NFS_OK;
b01dd1d8
BS		 2562}
2563
2564static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2565{
eb64cf96 2566 int status;
b01dd1d8 2567
0c116cad 2568 nfs41_check_delegation_stateid(state);
c5896fc8
TM		 2569 status = nfs41_check_expired_locks(state);
2570 if (status != NFS_OK)
2571 return status;
3e60ffdd 2572 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 2573 if (status != NFS_OK)
2574 status = nfs4_open_expired(sp, state);
2575 return status;
f062eb6c
BS		 2576}
2577#endif
2578
aa53ed54
JL		 2579/*
2580 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2581 * fields corresponding to attributes that were used to store the verifier.
2582 * Make sure we clobber those fields in the later setattr call
2583 */
5334c5bd
KM		 2584static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata,
2585 struct iattr *sattr, struct nfs4_label **label)
aa53ed54 2586{
5334c5bd
KM		 2587 const u32 *attrset = opendata->o_res.attrset;
2588
2589 if ((attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
aa53ed54
JL		 2590 !(sattr->ia_valid & ATTR_ATIME_SET))
2591 sattr->ia_valid |= ATTR_ATIME;
2592
5334c5bd 2593 if ((attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
aa53ed54
JL		 2594 !(sattr->ia_valid & ATTR_MTIME_SET))
2595 sattr->ia_valid |= ATTR_MTIME;
5334c5bd
KM		 2596
2597 /* Except MODE, it seems harmless of setting twice. */
a430607b 2598 if (opendata->o_arg.createmode != NFS4_CREATE_EXCLUSIVE &&
501e7a46
BC		 2599 (attrset[1] & FATTR4_WORD1_MODE ||
2600 attrset[2] & FATTR4_WORD2_MODE_UMASK))
5334c5bd
KM		 2601 sattr->ia_valid &= ~ATTR_MODE;
2602
2603 if (attrset[2] & FATTR4_WORD2_SECURITY_LABEL)
2604 *label = NULL;
aa53ed54
JL		 2605}
2606
c21443c2
TM		 2607static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2608 fmode_t fmode,
2609 int flags,
3efb9722 2610 struct nfs_open_context *ctx)
c21443c2
TM		 2611{
2612 struct nfs4_state_owner *sp = opendata->owner;
2613 struct nfs_server *server = sp->so_server;
275bb307 2614 struct dentry *dentry;
c21443c2
TM		 2615 struct nfs4_state *state;
2616 unsigned int seq;
2617 int ret;
2618
2619 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2620
2621 ret = _nfs4_proc_open(opendata);
dca78001 2622 if (ret != 0)
c21443c2
TM		 2623 goto out;
2624
2625 state = nfs4_opendata_to_nfs4_state(opendata);
2626 ret = PTR_ERR(state);
2627 if (IS_ERR(state))
2628 goto out;
a974deee 2629 ctx->state = state;
c21443c2
TM		 2630 if (server->caps & NFS_CAP_POSIX_LOCK)
2631 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
a8ce377a
JL		 2632 if (opendata->o_res.rflags & NFS4_OPEN_RESULT_MAY_NOTIFY_LOCK)
2633 set_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags);
c21443c2 2634
275bb307 2635 dentry = opendata->dentry;
2b0143b5 2636 if (d_really_is_negative(dentry)) {
668d0cd5 2637 struct dentry *alias;
275bb307 2638 d_drop(dentry);
668d0cd5
AV		 2639 alias = d_exact_alias(dentry, state->inode);
2640 if (!alias)
2641 alias = d_splice_alias(igrab(state->inode), dentry);
2642 /* d_splice_alias() can't fail here - it's a non-directory */
2643 if (alias) {
275bb307 2644 dput(ctx->dentry);
668d0cd5 2645 ctx->dentry = dentry = alias;
275bb307
TM		 2646 }
2647 nfs_set_verifier(dentry,
2b0143b5 2648 nfs_save_change_attribute(d_inode(opendata->dir)));
275bb307
TM		 2649 }
2650
c21443c2
TM		 2651 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2652 if (ret != 0)
2653 goto out;
2654
2b0143b5 2655 if (d_inode(dentry) == state->inode) {
c45ffdd2
TM		 2656 nfs_inode_attach_open_context(ctx);
2657 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2658 nfs4_schedule_stateid_recovery(server, state);
2659 }
c21443c2
TM		 2660out:
2661 return ret;
2662}
2663
1da177e4 2664/*
24ac23ab 2665 * Returns a referenced nfs4_state
1da177e4 2666 */
82be417a 2667static int _nfs4_do_open(struct inode *dir,
4197a055 2668 struct nfs_open_context *ctx,
82be417a
AA		 2669 int flags,
2670 struct iattr *sattr,
5bc2afc2
TM		 2671 struct nfs4_label *label,
2672 int *opened)
1da177e4
LT		 2673{
2674 struct nfs4_state_owner *sp;
2675 struct nfs4_state *state = NULL;
2676 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 2677 struct nfs4_opendata *opendata;
4197a055
TM		 2678 struct dentry *dentry = ctx->dentry;
2679 struct rpc_cred *cred = ctx->cred;
2680 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2681 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
49f9a0fa 2682 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
1775fd3e 2683 struct nfs4_label *olabel = NULL;
aac00a8d 2684 int status;
1da177e4
LT		 2685
2686 /* Protect against reboot recovery conflicts */
1da177e4 2687 status = -ENOMEM;
d1e284d5
TM		 2688 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2689 if (sp == NULL) {
1da177e4
LT		 2690 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2691 goto out_err;
2692 }
334f87dd 2693 status = nfs4_client_recover_expired_lease(server->nfs_client);
58d9714a 2694 if (status != 0)
b4454fe1 2695 goto err_put_state_owner;
2b0143b5
DH		 2696 if (d_really_is_positive(dentry))
2697 nfs4_return_incompatible_delegation(d_inode(dentry), fmode);
58d9714a 2698 status = -ENOMEM;
2b0143b5 2699 if (d_really_is_positive(dentry))
49f9a0fa 2700 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2701 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
1775fd3e 2702 label, claim, GFP_KERNEL);
e56e0b78 2703 if (opendata == NULL)
95d35cb4 2704 goto err_put_state_owner;
1da177e4 2705
14c43f76
DQ		 2706 if (label) {
2707 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2708 if (IS_ERR(olabel)) {
2709 status = PTR_ERR(olabel);
2710 goto err_opendata_put;
2711 }
2712 }
2713
e911b815
TM		 2714 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2715 if (!opendata->f_attr.mdsthreshold) {
2716 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2717 if (!opendata->f_attr.mdsthreshold)
2718 goto err_free_label;
2719 }
1549210f 2720 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2721 }
2b0143b5
DH		 2722 if (d_really_is_positive(dentry))
2723 opendata->state = nfs4_get_open_state(d_inode(dentry), sp);
aac00a8d 2724
3efb9722 2725 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
6168f62c 2726 if (status != 0)
14c43f76 2727 goto err_free_label;
3efb9722 2728 state = ctx->state;
6168f62c 2729
efcbc04e 2730 if ((opendata->o_arg.open_flags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) &&
549b19cc 2731 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
5334c5bd 2732 nfs4_exclusive_attrset(opendata, sattr, &label);
a1d1c4f1
TM		 2733 /*
2734 * send create attributes which was not set by open
2735 * with an extra setattr.
2736 */
2737 if (sattr->ia_valid & NFS4_VALID_ATTRS) {
2738 nfs_fattr_init(opendata->o_res.f_attr);
2739 status = nfs4_do_setattr(state->inode, cred,
2740 opendata->o_res.f_attr, sattr,
29b59f94 2741 ctx, label, olabel);
a1d1c4f1
TM		 2742 if (status == 0) {
2743 nfs_setattr_update_inode(state->inode, sattr,
2744 opendata->o_res.f_attr);
2745 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
2746 }
1775fd3e 2747 }
0ab64e0e 2748 }
c5c3fb5f 2749 if (opened && opendata->file_created)
5bc2afc2 2750 *opened |= FILE_CREATED;
82be417a 2751
e911b815 2752 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
82be417a 2753 *ctx_th = opendata->f_attr.mdsthreshold;
e911b815
TM		 2754 opendata->f_attr.mdsthreshold = NULL;
2755 }
82be417a 2756
14c43f76
DQ		 2757 nfs4_label_free(olabel);
2758
c6d00e63 2759 nfs4_opendata_put(opendata);
1da177e4 2760 nfs4_put_state_owner(sp);
1da177e4 2761 return 0;
14c43f76
DQ		 2762err_free_label:
2763 nfs4_label_free(olabel);
c6d00e63
TM		 2764err_opendata_put:
2765 nfs4_opendata_put(opendata);
e56e0b78
TM		 2766err_put_state_owner:
2767 nfs4_put_state_owner(sp);
1da177e4 2768out_err:
1da177e4
LT		 2769 return status;
2770}
2771
2772
82be417a 2773static struct nfs4_state *nfs4_do_open(struct inode *dir,
4197a055 2774 struct nfs_open_context *ctx,
82be417a
AA		 2775 int flags,
2776 struct iattr *sattr,
5bc2afc2
TM		 2777 struct nfs4_label *label,
2778 int *opened)
1da177e4 2779{
49f9a0fa 2780 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2781 struct nfs4_exception exception = { };
2782 struct nfs4_state *res;
2783 int status;
2784
2785 do {
5bc2afc2 2786 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
3efb9722 2787 res = ctx->state;
42113a75 2788 trace_nfs4_open_file(ctx, flags, status);
1da177e4
LT		 2789 if (status == 0)
2790 break;
2791 /* NOTE: BAD_SEQID means the server and client disagree about the
2792 * book-keeping w.r.t. state-changing operations
2793 * (OPEN/CLOSE/LOCK/LOCKU...)
2794 * It is actually a sign of a bug on the client or on the server.
2795 *
2796 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2797 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2798 * have unhashed the old state_owner for us, and that we can
2799 * therefore safely retry using a new one. We should still warn
2800 * the user though...
2801 */
2802 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2803 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2804 " returned a bad sequence-id error!\n",
2805 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2806 exception.retry = 1;
2807 continue;
2808 }
550f5747
TM		 2809 /*
2810 * BAD_STATEID on OPEN means that the server cancelled our
2811 * state before it received the OPEN_CONFIRM.
2812 * Recover by retrying the request as per the discussion
2813 * on Page 181 of RFC3530.
2814 */
2815 if (status == -NFS4ERR_BAD_STATEID) {
2816 exception.retry = 1;
2817 continue;
2818 }
aac00a8d
TM		 2819 if (status == -EAGAIN) {
2820 /* We must have found a delegation */
2821 exception.retry = 1;
2822 continue;
2823 }
49f9a0fa
TM		 2824 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2825 continue;
2826 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2827 status, &exception));
2828 } while (exception.retry);
2829 return res;
2830}
2831
8487c479
TM		 2832static int _nfs4_do_setattr(struct inode *inode,
2833 struct nfs_setattrargs *arg,
2834 struct nfs_setattrres *res,
2835 struct rpc_cred *cred,
29b59f94 2836 struct nfs_open_context *ctx)
1da177e4 2837{
3e4f6290 2838 struct nfs_server *server = NFS_SERVER(inode);
d9b67e1e 2839 struct rpc_message msg = {
659bfcd6 2840 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
8487c479
TM		 2841 .rpc_argp = arg,
2842 .rpc_resp = res,
659bfcd6 2843 .rpc_cred = cred,
d9b67e1e 2844 };
abf4e13c 2845 struct rpc_cred *delegation_cred = NULL;
26e976a8 2846 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2847 fmode_t fmode;
2848 bool truncate;
65e4308d 2849 int status;
1da177e4 2850
8487c479 2851 nfs_fattr_init(res->fattr);
1da177e4 2852
ee3ae84e 2853 /* Servers should only apply open mode checks for file size changes */
8487c479 2854 truncate = (arg->iap->ia_valid & ATTR_SIZE) ? true : false;
ee3ae84e
TM		 2855 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2856
8487c479 2857 if (nfs4_copy_delegation_stateid(inode, fmode, &arg->stateid, &delegation_cred)) {
ee3ae84e 2858 /* Use that stateid */
29b59f94 2859 } else if (truncate && ctx != NULL) {
17393475 2860 struct nfs_lock_context *l_ctx;
29b59f94 2861 if (!nfs4_valid_open_stateid(ctx->state))
0418dae1 2862 return -EBADF;
17393475
N		 2863 l_ctx = nfs_get_lock_context(ctx);
2864 if (IS_ERR(l_ctx))
2865 return PTR_ERR(l_ctx);
7a0566b3
N		 2866 status = nfs4_select_rw_stateid(ctx->state, FMODE_WRITE, l_ctx,
2867 &arg->stateid, &delegation_cred);
2868 nfs_put_lock_context(l_ctx);
2869 if (status == -EIO)
0418dae1 2870 return -EBADF;
08e9eac4 2871 } else
8487c479 2872 nfs4_stateid_copy(&arg->stateid, &zero_stateid);
abf4e13c
TM		 2873 if (delegation_cred)
2874 msg.rpc_cred = delegation_cred;
1da177e4 2875
8487c479 2876 status = nfs4_call_sync(server->client, server, &msg, &arg->seq_args, &res->seq_res, 1);
abf4e13c
TM		 2877
2878 put_rpccred(delegation_cred);
29b59f94 2879 if (status == 0 && ctx != NULL)
26e976a8 2880 renew_lease(server, timestamp);
8487c479 2881 trace_nfs4_setattr(inode, &arg->stateid, status);
65e4308d 2882 return status;
1da177e4
LT		 2883}
2884
659bfcd6
TM		 2885static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2886 struct nfs_fattr *fattr, struct iattr *sattr,
29b59f94 2887 struct nfs_open_context *ctx, struct nfs4_label *ilabel,
1775fd3e 2888 struct nfs4_label *olabel)
1da177e4 2889{
3e4f6290 2890 struct nfs_server *server = NFS_SERVER(inode);
29b59f94 2891 struct nfs4_state *state = ctx ? ctx->state : NULL;
d9b67e1e
AS		 2892 struct nfs_setattrargs arg = {
2893 .fh = NFS_FH(inode),
2894 .iap = sattr,
8487c479
TM		 2895 .server = server,
2896 .bitmask = server->attr_bitmask,
2897 .label = ilabel,
d9b67e1e
AS		 2898 };
2899 struct nfs_setattrres res = {
8487c479
TM		 2900 .fattr = fattr,
2901 .label = olabel,
2902 .server = server,
d9b67e1e 2903 };
a1d0b5ee
TM		 2904 struct nfs4_exception exception = {
2905 .state = state,
3114ea7a 2906 .inode = inode,
8487c479 2907 .stateid = &arg.stateid,
a1d0b5ee 2908 };
1da177e4 2909 int err;
8487c479
TM		 2910
2911 arg.bitmask = nfs4_bitmask(server, ilabel);
2912 if (ilabel)
2913 arg.bitmask = nfs4_bitmask(server, olabel);
2914
1da177e4 2915 do {
29b59f94 2916 err = _nfs4_do_setattr(inode, &arg, &res, cred, ctx);
451146be
TM		 2917 switch (err) {
2918 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 2919 if (!(sattr->ia_valid & ATTR_SIZE)) {
2920 pr_warn_once("NFSv4: server %s is incorrectly "
2921 "applying open mode checks to "
2922 "a SETATTR that is not "
2923 "changing file size.\n",
2924 server->nfs_client->cl_hostname);
2925 }
451146be
TM		 2926 if (state && !(state->state & FMODE_WRITE)) {
2927 err = -EBADF;
2928 if (sattr->ia_valid & ATTR_OPEN)
2929 err = -EACCES;
2930 goto out;
2931 }
2932 }
2933 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2934 } while (exception.retry);
451146be 2935out:
1da177e4
LT		 2936 return err;
2937}
2938
500d701f
PT		 2939static bool
2940nfs4_wait_on_layoutreturn(struct inode *inode, struct rpc_task *task)
2941{
2942 if (inode == NULL || !nfs_have_layout(inode))
2943 return false;
2944
2945 return pnfs_wait_on_layoutreturn(inode, task);
2946}
2947
1da177e4
LT		 2948struct nfs4_closedata {
2949 struct inode *inode;
2950 struct nfs4_state *state;
2951 struct nfs_closeargs arg;
2952 struct nfs_closeres res;
cf805165
TM		 2953 struct {
2954 struct nfs4_layoutreturn_args arg;
2955 struct nfs4_layoutreturn_res res;
4d796d75 2956 struct nfs4_xdr_opaque_data ld_private;
cf805165
TM		 2957 u32 roc_barrier;
2958 bool roc;
2959 } lr;
516a6af6 2960 struct nfs_fattr fattr;
26e976a8 2961 unsigned long timestamp;
1da177e4
LT		 2962};
2963
963d8fe5 2964static void nfs4_free_closedata(void *data)
9512135d 2965{
963d8fe5
TM		 2966 struct nfs4_closedata *calldata = data;
2967 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2968 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2969
cf805165 2970 if (calldata->lr.roc)
1c5bd76d
TM		 2971 pnfs_roc_release(&calldata->lr.arg, &calldata->lr.res,
2972 calldata->res.lr_ret);
9512135d
TM		 2973 nfs4_put_open_state(calldata->state);
2974 nfs_free_seqid(calldata->arg.seqid);
9512135d 2975 nfs4_put_state_owner(sp);
322b2b90 2976 nfs_sb_deactive(sb);
9512135d
TM		 2977 kfree(calldata);
2978}
2979
963d8fe5 2980static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2981{
963d8fe5 2982 struct nfs4_closedata *calldata = data;
1da177e4 2983 struct nfs4_state *state = calldata->state;
1da177e4 2984 struct nfs_server *server = NFS_SERVER(calldata->inode);
412f6c4c 2985 nfs4_stateid *res_stateid = NULL;
1da177e4 2986
a3ca5651 2987 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2988 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2989 return;
42113a75 2990 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
cf805165
TM		 2991
2992 /* Handle Layoutreturn errors */
2993 if (calldata->arg.lr_args && task->tk_status != 0) {
2994 switch (calldata->res.lr_ret) {
2995 default:
2996 calldata->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
2997 break;
2998 case 0:
2999 calldata->arg.lr_args = NULL;
3000 calldata->res.lr_res = NULL;
3001 break;
3002 case -NFS4ERR_ADMIN_REVOKED:
3003 case -NFS4ERR_DELEG_REVOKED:
3004 case -NFS4ERR_EXPIRED:
3005 case -NFS4ERR_BAD_STATEID:
3006 case -NFS4ERR_OLD_STATEID:
3007 case -NFS4ERR_UNKNOWN_LAYOUTTYPE:
3008 case -NFS4ERR_WRONG_CRED:
3009 calldata->arg.lr_args = NULL;
3010 calldata->res.lr_res = NULL;
3011 calldata->res.lr_ret = 0;
3012 rpc_restart_call_prepare(task);
3013 return;
3014 }
3015 }
3016
d9b67e1e 3017 /* hmm. we are done with the inode, and in the process of freeing
1da177e4
LT		 3018 * the state_owner. we keep this around to process errors
3019 */
1da177e4
LT		 3020 switch (task->tk_status) {
3021 case 0:
412f6c4c 3022 res_stateid = &calldata->res.stateid;
26e976a8 3023 renew_lease(server, calldata->timestamp);
412f6c4c 3024 break;
f07d4a31
TM		 3025 case -NFS4ERR_ACCESS:
3026 if (calldata->arg.bitmask != NULL) {
3027 calldata->arg.bitmask = NULL;
3028 calldata->res.fattr = NULL;
3029 task->tk_status = 0;
3030 rpc_restart_call_prepare(task);
3031 goto out_release;
3032
3033 }
3034 break;
69794ad7 3035 case -NFS4ERR_ADMIN_REVOKED:
1da177e4 3036 case -NFS4ERR_STALE_STATEID:
26d36301
TM		 3037 case -NFS4ERR_EXPIRED:
3038 nfs4_free_revoked_stateid(server,
3039 &calldata->arg.stateid,
3040 task->tk_msg.rpc_cred);
9e33bed5
TM		 3041 case -NFS4ERR_OLD_STATEID:
3042 case -NFS4ERR_BAD_STATEID:
566fcec6 3043 if (!nfs4_stateid_match(&calldata->arg.stateid,
369d6b7f 3044 &state->open_stateid)) {
566fcec6
TM		 3045 rpc_restart_call_prepare(task);
3046 goto out_release;
3047 }
dc0b027d 3048 if (calldata->arg.fmode == 0)
9e33bed5 3049 break;
1da177e4 3050 default:
8478eaa1 3051 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN) {
72211dbe 3052 rpc_restart_call_prepare(task);
69794ad7
TM		 3053 goto out_release;
3054 }
1da177e4 3055 }
4a1e2feb
TM		 3056 nfs_clear_open_stateid(state, &calldata->arg.stateid,
3057 res_stateid, calldata->arg.fmode);
69794ad7 3058out_release:
72211dbe 3059 nfs_release_seqid(calldata->arg.seqid);
d8d84983 3060 nfs_refresh_inode(calldata->inode, &calldata->fattr);
a3ca5651 3061 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 3062}
3063
4ce70ada 3064static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 3065{
4ce70ada 3066 struct nfs4_closedata *calldata = data;
9512135d 3067 struct nfs4_state *state = calldata->state;
7fdab069 3068 struct inode *inode = calldata->inode;
aee7af35 3069 bool is_rdonly, is_wronly, is_rdwr;
88069f77 3070 int call_close = 0;
9512135d 3071
a3ca5651 3072 dprintk("%s: begin!\n", __func__);
963d8fe5 3073 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 3074 goto out_wait;
003707c7 3075
88069f77 3076 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
4cecb76f 3077 spin_lock(&state->owner->so_lock);
aee7af35
TM		 3078 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
3079 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
3080 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
369d6b7f 3081 nfs4_stateid_copy(&calldata->arg.stateid, &state->open_stateid);
003707c7 3082 /* Calculate the change in open mode */
cd9288ff 3083 calldata->arg.fmode = 0;
e7616923 3084 if (state->n_rdwr == 0) {
cd9288ff
TM		 3085 if (state->n_rdonly == 0)
3086 call_close |= is_rdonly;
3087 else if (is_rdonly)
3088 calldata->arg.fmode |= FMODE_READ;
3089 if (state->n_wronly == 0)
3090 call_close |= is_wronly;
3091 else if (is_wronly)
3092 calldata->arg.fmode |= FMODE_WRITE;
e547f262
TM		 3093 if (calldata->arg.fmode != (FMODE_READ|FMODE_WRITE))
3094 call_close |= is_rdwr;
cd9288ff
TM		 3095 } else if (is_rdwr)
3096 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
3097
5cc7861e
TM		 3098 if (!nfs4_valid_open_stateid(state) ||
3099 test_bit(NFS_OPEN_STATE, &state->flags) == 0)
5d422301 3100 call_close = 0;
4cecb76f 3101 spin_unlock(&state->owner->so_lock);
88069f77
TM		 3102
3103 if (!call_close) {
963d8fe5 3104 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 3105 goto out_no_action;
9512135d 3106 }
88069f77 3107
1c5bd76d 3108 if (!calldata->lr.roc && nfs4_wait_on_layoutreturn(inode, task)) {
500d701f
PT		 3109 nfs_release_seqid(calldata->arg.seqid);
3110 goto out_wait;
3111 }
3112
9413a1a1 3113 if (calldata->arg.fmode == 0)
88069f77 3114 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
3ecefc92 3115
9413a1a1 3116 if (calldata->arg.fmode == 0 || calldata->arg.fmode == FMODE_READ) {
3ecefc92
TM		 3117 /* Close-to-open cache consistency revalidation */
3118 if (!nfs4_have_delegation(inode, FMODE_READ))
3119 calldata->arg.bitmask = NFS_SERVER(inode)->cache_consistency_bitmask;
3120 else
3121 calldata->arg.bitmask = NULL;
3122 }
3c13cb5b 3123
6ae37339
TM		 3124 calldata->arg.share_access =
3125 nfs4_map_atomic_open_share(NFS_SERVER(inode),
3126 calldata->arg.fmode, 0);
88069f77 3127
d8d84983
TM		 3128 if (calldata->res.fattr == NULL)
3129 calldata->arg.bitmask = NULL;
3130 else if (calldata->arg.bitmask == NULL)
3131 calldata->res.fattr = NULL;
26e976a8 3132 calldata->timestamp = jiffies;
42e1cca7 3133 if (nfs4_setup_sequence(NFS_SERVER(inode)->nfs_client,
9d12b216
TM		 3134 &calldata->arg.seq_args,
3135 &calldata->res.seq_res,
2240a9e2
TM		 3136 task) != 0)
3137 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 3138 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 3139 return;
3140out_no_action:
3141 task->tk_action = NULL;
3142out_wait:
3143 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 3144}
3145
963d8fe5 3146static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 3147 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 3148 .rpc_call_done = nfs4_close_done,
3149 .rpc_release = nfs4_free_closedata,
3150};
3151
1da177e4
LT		 3152/*
3153 * It is possible for data to be read/written from a mem-mapped file
3154 * after the sys_close call (which hits the vfs layer as a flush).
3155 * This means that we can't safely call nfsv4 close on a file until
3156 * the inode is cleared. This in turn means that we are not good
3157 * NFSv4 citizens - we do not indicate to the server to update the file's
3158 * share state even when we are done with one of the three share
3159 * stateid's in the inode.
3160 *
3161 * NOTE: Caller must be holding the sp->so_owner semaphore!
3162 */
1f7977c1 3163int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 3164{
4a35bd41 3165 struct nfs_server *server = NFS_SERVER(state->inode);
63f5f796 3166 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
1da177e4 3167 struct nfs4_closedata *calldata;
b39e625b
TM		 3168 struct nfs4_state_owner *sp = state->owner;
3169 struct rpc_task *task;
5138fde0
TM		 3170 struct rpc_message msg = {
3171 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
3172 .rpc_cred = state->owner->so_cred,
3173 };
c970aa85
TM		 3174 struct rpc_task_setup task_setup_data = {
3175 .rpc_client = server->client,
5138fde0 3176 .rpc_message = &msg,
c970aa85 3177 .callback_ops = &nfs4_close_ops,
101070ca 3178 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3179 .flags = RPC_TASK_ASYNC,
3180 };
9512135d 3181 int status = -ENOMEM;
1da177e4 3182
fa940720
WAA		 3183 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
3184 &task_setup_data.rpc_client, &msg);
3185
8535b2be 3186 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 3187 if (calldata == NULL)
9512135d 3188 goto out;
a9c92d6b 3189 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 3190 calldata->inode = state->inode;
1da177e4 3191 calldata->state = state;
4a35bd41 3192 calldata->arg.fh = NFS_FH(state->inode);
1da177e4 3193 /* Serialization for the sequence id */
63f5f796
TM		 3194 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
3195 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask);
badc76dd 3196 if (IS_ERR(calldata->arg.seqid))
9512135d 3197 goto out_free_calldata;
d8d84983 3198 nfs_fattr_init(&calldata->fattr);
dc0b027d 3199 calldata->arg.fmode = 0;
4d796d75 3200 calldata->lr.arg.ld_private = &calldata->lr.ld_private;
516a6af6 3201 calldata->res.fattr = &calldata->fattr;
c1d51931 3202 calldata->res.seqid = calldata->arg.seqid;
516a6af6 3203 calldata->res.server = server;
cf805165 3204 calldata->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
1c5bd76d
TM		 3205 calldata->lr.roc = pnfs_roc(state->inode,
3206 &calldata->lr.arg, &calldata->lr.res, msg.rpc_cred);
3207 if (calldata->lr.roc) {
3208 calldata->arg.lr_args = &calldata->lr.arg;
3209 calldata->res.lr_res = &calldata->lr.res;
3210 }
643168c2 3211 nfs_sb_active(calldata->inode->i_sb);
9512135d 3212
1174dd1f
TM		 3213 msg.rpc_argp = &calldata->arg;
3214 msg.rpc_resp = &calldata->res;
c970aa85
TM		 3215 task_setup_data.callback_data = calldata;
3216 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 3217 if (IS_ERR(task))
3218 return PTR_ERR(task);
a49c3c77
TM		 3219 status = 0;
3220 if (wait)
3221 status = rpc_wait_for_completion_task(task);
b39e625b 3222 rpc_put_task(task);
a49c3c77 3223 return status;
9512135d
TM		 3224out_free_calldata:
3225 kfree(calldata);
3226out:
b39e625b
TM		 3227 nfs4_put_open_state(state);
3228 nfs4_put_state_owner(sp);
9512135d 3229 return status;
1da177e4
LT		 3230}
3231
2b484297 3232static struct inode *
5bc2afc2
TM		 3233nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
3234 int open_flags, struct iattr *attr, int *opened)
1da177e4 3235{
1da177e4 3236 struct nfs4_state *state;
aa9c2669
DQ		 3237 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
3238
3239 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
1da177e4 3240
565277f6 3241 /* Protect against concurrent sillydeletes */
5bc2afc2 3242 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
aa9c2669
DQ		 3243
3244 nfs4_label_release_security(label);
3245
f46e0bd3
TM		 3246 if (IS_ERR(state))
3247 return ERR_CAST(state);
275bb307 3248 return state->inode;
1da177e4
LT		 3249}
3250
1185a552 3251static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 3252{
3253 if (ctx->state == NULL)
3254 return;
3255 if (is_sync)
643168c2 3256 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 3257 else
643168c2 3258 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 3259}
1da177e4 3260
b944dba3
TM		 3261#define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
3262#define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
dff25ddb 3263#define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_MODE_UMASK - 1UL)
b944dba3 3264
1da177e4
LT		 3265static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
3266{
8c61282f 3267 u32 bitmask[3] = {}, minorversion = server->nfs_client->cl_minorversion;
43652ad5
BH		 3268 struct nfs4_server_caps_arg args = {
3269 .fhandle = fhandle,
8c61282f 3270 .bitmask = bitmask,
43652ad5 3271 };
1da177e4
LT		 3272 struct nfs4_server_caps_res res = {};
3273 struct rpc_message msg = {
3274 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 3275 .rpc_argp = &args,
1da177e4
LT		 3276 .rpc_resp = &res,
3277 };
3278 int status;
f4b23de3 3279 int i;
1da177e4 3280
8c61282f
KM		 3281 bitmask[0] = FATTR4_WORD0_SUPPORTED_ATTRS |
3282 FATTR4_WORD0_FH_EXPIRE_TYPE |
3283 FATTR4_WORD0_LINK_SUPPORT |
3284 FATTR4_WORD0_SYMLINK_SUPPORT |
3285 FATTR4_WORD0_ACLSUPPORT;
3286 if (minorversion)
3287 bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3288
7c513058 3289 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3290 if (status == 0) {
b944dba3 3291 /* Sanity check the server answers */
8c61282f 3292 switch (minorversion) {
b944dba3
TM		 3293 case 0:
3294 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
3295 res.attr_bitmask[2] = 0;
3296 break;
3297 case 1:
3298 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
3299 break;
3300 case 2:
3301 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
3302 }
1da177e4 3303 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 3304 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
3305 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
3306 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
3307 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
b944dba3
TM		 3308 NFS_CAP_CTIME|NFS_CAP_MTIME|
3309 NFS_CAP_SECURITY_LABEL);
7dd7d959
MN		 3310 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
3311 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
1da177e4
LT		 3312 server->caps |= NFS_CAP_ACLS;
3313 if (res.has_links != 0)
3314 server->caps |= NFS_CAP_HARDLINKS;
3315 if (res.has_symlinks != 0)
3316 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 3317 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
3318 server->caps |= NFS_CAP_FILEID;
3319 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
3320 server->caps |= NFS_CAP_MODE;
3321 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
3322 server->caps |= NFS_CAP_NLINK;
3323 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
3324 server->caps |= NFS_CAP_OWNER;
3325 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
3326 server->caps |= NFS_CAP_OWNER_GROUP;
3327 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
3328 server->caps |= NFS_CAP_ATIME;
3329 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
3330 server->caps |= NFS_CAP_CTIME;
3331 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
3332 server->caps |= NFS_CAP_MTIME;
aa9c2669
DQ		 3333#ifdef CONFIG_NFS_V4_SECURITY_LABEL
3334 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
3335 server->caps |= NFS_CAP_SECURITY_LABEL;
3336#endif
3337 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
3338 sizeof(server->attr_bitmask));
b944dba3 3339 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
62ab460c 3340
a65318bf
TM		 3341 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
3342 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
3343 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
b944dba3 3344 server->cache_consistency_bitmask[2] = 0;
f4b23de3
TM		 3345
3346 /* Avoid a regression due to buggy server */
3347 for (i = 0; i < ARRAY_SIZE(res.exclcreat_bitmask); i++)
3348 res.exclcreat_bitmask[i] &= res.attr_bitmask[i];
8c61282f
KM		 3349 memcpy(server->exclcreat_bitmask, res.exclcreat_bitmask,
3350 sizeof(server->exclcreat_bitmask));
f4b23de3 3351
1da177e4 3352 server->acl_bitmask = res.acl_bitmask;
264e6351 3353 server->fh_expire_type = res.fh_expire_type;
1da177e4 3354 }
cccef3b9 3355
1da177e4
LT		 3356 return status;
3357}
3358
55a97593 3359int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 3360{
3361 struct nfs4_exception exception = { };
3362 int err;
3363 do {
3364 err = nfs4_handle_exception(server,
3365 _nfs4_server_capabilities(server, fhandle),
3366 &exception);
3367 } while (exception.retry);
3368 return err;
3369}
3370
3371static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3372 struct nfs_fsinfo *info)
3373{
aa9c2669 3374 u32 bitmask[3];
1da177e4 3375 struct nfs4_lookup_root_arg args = {
aa9c2669 3376 .bitmask = bitmask,
1da177e4
LT		 3377 };
3378 struct nfs4_lookup_res res = {
3379 .server = server,
0e574af1 3380 .fattr = info->fattr,
1da177e4
LT		 3381 .fh = fhandle,
3382 };
3383 struct rpc_message msg = {
3384 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
3385 .rpc_argp = &args,
3386 .rpc_resp = &res,
3387 };
008f55d0 3388
aa9c2669
DQ		 3389 bitmask[0] = nfs4_fattr_bitmap[0];
3390 bitmask[1] = nfs4_fattr_bitmap[1];
3391 /*
3392 * Process the label in the upcoming getfattr
3393 */
3394 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
3395
0e574af1 3396 nfs_fattr_init(info->fattr);
7c513058 3397 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3398}
3399
3400static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3401 struct nfs_fsinfo *info)
3402{
3403 struct nfs4_exception exception = { };
3404 int err;
3405 do {
fb8a5ba8 3406 err = _nfs4_lookup_root(server, fhandle, info);
b5f875a9 3407 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
fb8a5ba8
BS		 3408 switch (err) {
3409 case 0:
3410 case -NFS4ERR_WRONGSEC:
05e9cfb4 3411 goto out;
fb8a5ba8
BS		 3412 default:
3413 err = nfs4_handle_exception(server, err, &exception);
3414 }
1da177e4 3415 } while (exception.retry);
05e9cfb4 3416out:
1da177e4
LT		 3417 return err;
3418}
3419
8f70e95f
BS		 3420static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3421 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
3422{
c2190661
TM		 3423 struct rpc_auth_create_args auth_args = {
3424 .pseudoflavor = flavor,
3425 };
8f70e95f 3426 struct rpc_auth *auth;
8f70e95f 3427
c2190661 3428 auth = rpcauth_create(&auth_args, server->client);
9df1336c
AS		 3429 if (IS_ERR(auth))
3430 return -EACCES;
3431 return nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 3432}
3433
9a744ba3
CL		 3434/*
3435 * Retry pseudoroot lookup with various security flavors. We do this when:
3436 *
3437 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
3438 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
3439 *
3440 * Returns zero on success, or a negative NFS4ERR value, or a
3441 * negative errno value.
3442 */
801a16dc 3443static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 3444 struct nfs_fsinfo *info)
1da177e4 3445{
9a744ba3
CL		 3446 /* Per 3530bis 15.33.5 */
3447 static const rpc_authflavor_t flav_array[] = {
3448 RPC_AUTH_GSS_KRB5P,
3449 RPC_AUTH_GSS_KRB5I,
3450 RPC_AUTH_GSS_KRB5,
c4eafe11 3451 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 3452 RPC_AUTH_NULL,
3453 };
3454 int status = -EPERM;
3455 size_t i;
6a1a1e34 3456
4d4b69dd
WAA		 3457 if (server->auth_info.flavor_len > 0) {
3458 /* try each flavor specified by user */
3459 for (i = 0; i < server->auth_info.flavor_len; i++) {
3460 status = nfs4_lookup_root_sec(server, fhandle, info,
3461 server->auth_info.flavors[i]);
3462 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3463 continue;
3464 break;
3465 }
3466 } else {
3467 /* no flavors specified by user, try default list */
3468 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3469 status = nfs4_lookup_root_sec(server, fhandle, info,
3470 flav_array[i]);
3471 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3472 continue;
3473 break;
3474 }
8f70e95f 3475 }
9a744ba3 3476
fb8a5ba8
BS		 3477 /*
3478 * -EACCESS could mean that the user doesn't have correct permissions
3479 * to access the mount. It could also mean that we tried to mount
3480 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
3481 * existing mount programs don't handle -EACCES very well so it should
3482 * be mapped to -EPERM instead.
3483 */
3484 if (status == -EACCES)
3485 status = -EPERM;
801a16dc
BS		 3486 return status;
3487}
3488
2ed4b95b
CL		 3489/**
3490 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
3491 * @server: initialized nfs_server handle
3492 * @fhandle: we fill in the pseudo-fs root file handle
3493 * @info: we fill in an FSINFO struct
5e6b1990 3494 * @auth_probe: probe the auth flavours
2ed4b95b
CL		 3495 *
3496 * Returns zero on success, or a negative errno.
801a16dc 3497 */
3028eb2b 3498int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
5e6b1990
TM		 3499 struct nfs_fsinfo *info,
3500 bool auth_probe)
801a16dc 3501{
c7757074 3502 int status = 0;
2ed4b95b 3503
c7757074 3504 if (!auth_probe)
5e6b1990 3505 status = nfs4_lookup_root(server, fhandle, info);
c7757074
AP		 3506
3507 if (auth_probe || status == NFS4ERR_WRONGSEC)
698c937b
TM		 3508 status = server->nfs_client->cl_mvops->find_root_sec(server,
3509 fhandle, info);
2ed4b95b 3510
1da177e4
LT		 3511 if (status == 0)
3512 status = nfs4_server_capabilities(server, fhandle);
3513 if (status == 0)
3514 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 3515
c12e87f4 3516 return nfs4_map_errors(status);
1da177e4
LT		 3517}
3518
bae36241
BS		 3519static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3520 struct nfs_fsinfo *info)
3521{
3522 int error;
3523 struct nfs_fattr *fattr = info->fattr;
1775fd3e 3524 struct nfs4_label *label = NULL;
bae36241
BS		 3525
3526 error = nfs4_server_capabilities(server, mntfh);
3527 if (error < 0) {
3528 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3529 return error;
3530 }
3531
14c43f76
DQ		 3532 label = nfs4_label_alloc(server, GFP_KERNEL);
3533 if (IS_ERR(label))
3534 return PTR_ERR(label);
3535
1775fd3e 3536 error = nfs4_proc_getattr(server, mntfh, fattr, label);
bae36241
BS		 3537 if (error < 0) {
3538 dprintk("nfs4_get_root: getattr error = %d\n", -error);
14c43f76 3539 goto err_free_label;
bae36241
BS		 3540 }
3541
3542 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3543 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3544 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3545
14c43f76
DQ		 3546err_free_label:
3547 nfs4_label_free(label);
3548
bae36241
BS		 3549 return error;
3550}
3551
6b97fd3d
MN		 3552/*
3553 * Get locations and (maybe) other attributes of a referral.
3554 * Note that we'll actually follow the referral later when
3555 * we detect fsid mismatch in inode revalidation
3556 */
f05d147f
BS		 3557static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3558 const struct qstr *name, struct nfs_fattr *fattr,
3559 struct nfs_fh *fhandle)
6b97fd3d
MN		 3560{
3561 int status = -ENOMEM;
3562 struct page *page = NULL;
3563 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 3564
3565 page = alloc_page(GFP_KERNEL);
3566 if (page == NULL)
3567 goto out;
3568 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3569 if (locations == NULL)
3570 goto out;
3571
f05d147f 3572 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 3573 if (status != 0)
3574 goto out;
519ae255
CL		 3575
3576 /*
3577 * If the fsid didn't change, this is a migration event, not a
3578 * referral. Cause us to drop into the exception handler, which
3579 * will kick off migration recovery.
3580 */
6b97fd3d 3581 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 3582 dprintk("%s: server did not return a different fsid for"
3583 " a referral at %s\n", __func__, name->name);
519ae255 3584 status = -NFS4ERR_MOVED;
6b97fd3d
MN		 3585 goto out;
3586 }
533eb461
AA		 3587 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3588 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 3589
533eb461 3590 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 3591 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 3592 memset(fhandle, 0, sizeof(struct nfs_fh));
3593out:
3594 if (page)
3595 __free_page(page);
5d7ca35a 3596 kfree(locations);
6b97fd3d
MN		 3597 return status;
3598}
3599
1775fd3e
DQ		 3600static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3601 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3602{
3603 struct nfs4_getattr_arg args = {
3604 .fh = fhandle,
3605 .bitmask = server->attr_bitmask,
3606 };
3607 struct nfs4_getattr_res res = {
3608 .fattr = fattr,
1775fd3e 3609 .label = label,
1da177e4
LT		 3610 .server = server,
3611 };
3612 struct rpc_message msg = {
3613 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3614 .rpc_argp = &args,
3615 .rpc_resp = &res,
3616 };
aa9c2669
DQ		 3617
3618 args.bitmask = nfs4_bitmask(server, label);
3619
0e574af1 3620 nfs_fattr_init(fattr);
7c513058 3621 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3622}
3623
1775fd3e
DQ		 3624static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3625 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3626{
3627 struct nfs4_exception exception = { };
3628 int err;
3629 do {
b5f875a9
TM		 3630 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3631 trace_nfs4_getattr(server, fhandle, fattr, err);
3632 err = nfs4_handle_exception(server, err,
1da177e4
LT		 3633 &exception);
3634 } while (exception.retry);
3635 return err;
3636}
3637
3638/*
3639 * The file is not closed if it is opened due to the a request to change
3640 * the size of the file. The open call will not be needed once the
3641 * VFS layer lookup-intents are implemented.
3642 *
3643 * Close is called when the inode is destroyed.
3644 * If we haven't opened the file for O_WRONLY, we
3645 * need to in the size_change case to obtain a stateid.
3646 *
3647 * Got race?
3648 * Because OPEN is always done by name in nfsv4, it is
3649 * possible that we opened a different file by the same
3650 * name. We can recognize this race condition, but we
3651 * can't do anything about it besides returning an error.
3652 *
3653 * This will be fixed with VFS changes (lookup-intent).
3654 */
3655static int
3656nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3657 struct iattr *sattr)
3658{
2b0143b5 3659 struct inode *inode = d_inode(dentry);
659bfcd6 3660 struct rpc_cred *cred = NULL;
29b59f94 3661 struct nfs_open_context *ctx = NULL;
14c43f76 3662 struct nfs4_label *label = NULL;
1da177e4
LT		 3663 int status;
3664
88ac815c
PT		 3665 if (pnfs_ld_layoutret_on_setattr(inode) &&
3666 sattr->ia_valid & ATTR_SIZE &&
3667 sattr->ia_size < i_size_read(inode))
24028672 3668 pnfs_commit_and_return_layout(inode);
8a1636c4 3669
0e574af1 3670 nfs_fattr_init(fattr);
1da177e4 3671
2669940d
AA		 3672 /* Deal with open(O_TRUNC) */
3673 if (sattr->ia_valid & ATTR_OPEN)
cc7936f9 3674 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2669940d
AA		 3675
3676 /* Optimization: if the end result is no change, don't RPC */
cc7936f9 3677 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2669940d
AA		 3678 return 0;
3679
d530838b 3680 /* Search for an existing open(O_WRITE) file */
659bfcd6 3681 if (sattr->ia_valid & ATTR_FILE) {
659bfcd6
TM		 3682
3683 ctx = nfs_file_open_context(sattr->ia_file);
29b59f94 3684 if (ctx)
504e5189 3685 cred = ctx->cred;
659bfcd6 3686 }
08e9eac4 3687
14c43f76
DQ		 3688 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3689 if (IS_ERR(label))
3690 return PTR_ERR(label);
3691
29b59f94 3692 status = nfs4_do_setattr(inode, cred, fattr, sattr, ctx, NULL, label);
aa9c2669 3693 if (status == 0) {
f044636d 3694 nfs_setattr_update_inode(inode, sattr, fattr);
aa9c2669
DQ		 3695 nfs_setsecurity(inode, fattr, label);
3696 }
14c43f76 3697 nfs4_label_free(label);
1da177e4
LT		 3698 return status;
3699}
3700
0c2e53f1
TM		 3701static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3702 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3703 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 3704{
0c2e53f1 3705 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 3706 int status;
3707 struct nfs4_lookup_arg args = {
3708 .bitmask = server->attr_bitmask,
0c2e53f1 3709 .dir_fh = NFS_FH(dir),
2b3de441
DH		 3710 .name = name,
3711 };
3712 struct nfs4_lookup_res res = {
3713 .server = server,
3714 .fattr = fattr,
aa9c2669 3715 .label = label,
2b3de441
DH		 3716 .fh = fhandle,
3717 };
3718 struct rpc_message msg = {
3719 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3720 .rpc_argp = &args,
3721 .rpc_resp = &res,
3722 };
3723
aa9c2669
DQ		 3724 args.bitmask = nfs4_bitmask(server, label);
3725
2b3de441
DH		 3726 nfs_fattr_init(fattr);
3727
1da177e4 3728 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 3729 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3730 dprintk("NFS reply lookup: %d\n", status);
3731 return status;
3732}
3733
72de53ec 3734static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 3735{
7ebb9315 3736 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 3737 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 3738 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3739 fattr->nlink = 2;
3740}
3741
72de53ec 3742static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
beffb8fe 3743 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3744 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3745{
3746 struct nfs4_exception exception = { };
72de53ec 3747 struct rpc_clnt *client = *clnt;
1da177e4
LT		 3748 int err;
3749 do {
1775fd3e 3750 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
078ea3df 3751 trace_nfs4_lookup(dir, name, err);
72de53ec 3752 switch (err) {
08ef7bd3 3753 case -NFS4ERR_BADNAME:
72de53ec
BS		 3754 err = -ENOENT;
3755 goto out;
0c2e53f1 3756 case -NFS4ERR_MOVED:
f05d147f 3757 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
c86c90c6
DM		 3758 if (err == -NFS4ERR_MOVED)
3759 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
72de53ec 3760 goto out;
0c2e53f1 3761 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 3762 err = -EPERM;
3763 if (client != *clnt)
3764 goto out;
66b06860 3765 client = nfs4_negotiate_security(client, dir, name);
72de53ec
BS		 3766 if (IS_ERR(client))
3767 return PTR_ERR(client);
3768
3769 exception.retry = 1;
3770 break;
3771 default:
3772 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 3773 }
1da177e4 3774 } while (exception.retry);
72de53ec
BS		 3775
3776out:
3777 if (err == 0)
3778 *clnt = client;
3779 else if (client != *clnt)
3780 rpc_shutdown_client(client);
3781
1da177e4
LT		 3782 return err;
3783}
3784
beffb8fe 3785static int nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1775fd3e
DQ		 3786 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3787 struct nfs4_label *label)
72de53ec
BS		 3788{
3789 int status;
3790 struct rpc_clnt *client = NFS_CLIENT(dir);
3791
1775fd3e 3792 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
72de53ec
BS		 3793 if (client != NFS_CLIENT(dir)) {
3794 rpc_shutdown_client(client);
3795 nfs_fixup_secinfo_attributes(fattr);
3796 }
3797 return status;
3798}
3799
f05d147f 3800struct rpc_clnt *
beffb8fe 3801nfs4_proc_lookup_mountpoint(struct inode *dir, const struct qstr *name,
f05d147f
BS		 3802 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3803{
b72888cb 3804 struct rpc_clnt *client = NFS_CLIENT(dir);
f05d147f 3805 int status;
f05d147f 3806
1775fd3e 3807 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
b72888cb 3808 if (status < 0)
f05d147f 3809 return ERR_PTR(status);
b72888cb 3810 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
f05d147f
BS		 3811}
3812
5b5faaf6
JL		 3813static int _nfs4_proc_lookupp(struct inode *inode,
3814 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3815 struct nfs4_label *label)
3816{
3817 struct rpc_clnt *clnt = NFS_CLIENT(inode);
3818 struct nfs_server *server = NFS_SERVER(inode);
3819 int status;
3820 struct nfs4_lookupp_arg args = {
3821 .bitmask = server->attr_bitmask,
3822 .fh = NFS_FH(inode),
3823 };
3824 struct nfs4_lookupp_res res = {
3825 .server = server,
3826 .fattr = fattr,
3827 .label = label,
3828 .fh = fhandle,
3829 };
3830 struct rpc_message msg = {
3831 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUPP],
3832 .rpc_argp = &args,
3833 .rpc_resp = &res,
3834 };
3835
3836 args.bitmask = nfs4_bitmask(server, label);
3837
3838 nfs_fattr_init(fattr);
3839
3840 dprintk("NFS call lookupp ino=0x%lx\n", inode->i_ino);
3841 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
3842 &res.seq_res, 0);
3843 dprintk("NFS reply lookupp: %d\n", status);
3844 return status;
3845}
3846
3847static int nfs4_proc_lookupp(struct inode *inode, struct nfs_fh *fhandle,
3848 struct nfs_fattr *fattr, struct nfs4_label *label)
3849{
3850 struct nfs4_exception exception = { };
3851 int err;
3852 do {
3853 err = _nfs4_proc_lookupp(inode, fhandle, fattr, label);
3854 trace_nfs4_lookupp(inode, err);
3855 err = nfs4_handle_exception(NFS_SERVER(inode), err,
3856 &exception);
3857 } while (exception.retry);
3858 return err;
3859}
3860
1da177e4
LT		 3861static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3862{
76b32999 3863 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3864 struct nfs4_accessargs args = {
3865 .fh = NFS_FH(inode),
a4980e78 3866 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 3867 };
3868 struct nfs4_accessres res = {
3869 .server = server,
1da177e4 3870 };
1da177e4
LT		 3871 struct rpc_message msg = {
3872 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3873 .rpc_argp = &args,
3874 .rpc_resp = &res,
3875 .rpc_cred = entry->cred,
3876 };
3877 int mode = entry->mask;
aa9c2669 3878 int status = 0;
1da177e4
LT		 3879
3880 /*
3881 * Determine which access bits we want to ask for...
3882 */
3883 if (mode & MAY_READ)
3884 args.access |= NFS4_ACCESS_READ;
3885 if (S_ISDIR(inode->i_mode)) {
3886 if (mode & MAY_WRITE)
3887 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3888 if (mode & MAY_EXEC)
3889 args.access |= NFS4_ACCESS_LOOKUP;
3890 } else {
3891 if (mode & MAY_WRITE)
3892 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3893 if (mode & MAY_EXEC)
3894 args.access |= NFS4_ACCESS_EXECUTE;
3895 }
c407d41a
TM		 3896
3897 res.fattr = nfs_alloc_fattr();
3898 if (res.fattr == NULL)
3899 return -ENOMEM;
3900
7c513058 3901 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3902 if (!status) {
6168f62c 3903 nfs_access_set_mask(entry, res.access);
c407d41a 3904 nfs_refresh_inode(inode, res.fattr);
1da177e4 3905 }
c407d41a 3906 nfs_free_fattr(res.fattr);
1da177e4
LT		 3907 return status;
3908}
3909
3910static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3911{
3912 struct nfs4_exception exception = { };
3913 int err;
3914 do {
c1578b76
TM		 3915 err = _nfs4_proc_access(inode, entry);
3916 trace_nfs4_access(inode, err);
3917 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3918 &exception);
3919 } while (exception.retry);
3920 return err;
3921}
3922
3923/*
3924 * TODO: For the time being, we don't try to get any attributes
3925 * along with any of the zero-copy operations READ, READDIR,
3926 * READLINK, WRITE.
3927 *
3928 * In the case of the first three, we want to put the GETATTR
3929 * after the read-type operation -- this is because it is hard
3930 * to predict the length of a GETATTR response in v4, and thus
3931 * align the READ data correctly. This means that the GETATTR
3932 * may end up partially falling into the page cache, and we should
3933 * shift it into the 'tail' of the xdr_buf before processing.
3934 * To do this efficiently, we need to know the total length
3935 * of data received, which doesn't seem to be available outside
3936 * of the RPC layer.
3937 *
3938 * In the case of WRITE, we also want to put the GETATTR after
3939 * the operation -- in this case because we want to make sure
140150db 3940 * we get the post-operation mtime and size.
1da177e4
LT		 3941 *
3942 * Both of these changes to the XDR layer would in fact be quite
3943 * minor, but I decided to leave them for a subsequent patch.
3944 */
3945static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3946 unsigned int pgbase, unsigned int pglen)
3947{
3948 struct nfs4_readlink args = {
3949 .fh = NFS_FH(inode),
3950 .pgbase = pgbase,
3951 .pglen = pglen,
3952 .pages = &page,
3953 };
f50c7000 3954 struct nfs4_readlink_res res;
1da177e4
LT		 3955 struct rpc_message msg = {
3956 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3957 .rpc_argp = &args,
f50c7000 3958 .rpc_resp = &res,
1da177e4
LT		 3959 };
3960
7c513058 3961 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3962}
3963
3964static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3965 unsigned int pgbase, unsigned int pglen)
3966{
3967 struct nfs4_exception exception = { };
3968 int err;
3969 do {
c1578b76
TM		 3970 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3971 trace_nfs4_readlink(inode, err);
3972 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3973 &exception);
3974 } while (exception.retry);
3975 return err;
3976}
3977
1da177e4 3978/*
8867fe58 3979 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3980 */
1da177e4
LT		 3981static int
3982nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3983 int flags)
1da177e4 3984{
dff25ddb 3985 struct nfs_server *server = NFS_SERVER(dir);
aa9c2669 3986 struct nfs4_label l, *ilabel = NULL;
8867fe58 3987 struct nfs_open_context *ctx;
1da177e4 3988 struct nfs4_state *state;
1da177e4
LT		 3989 int status = 0;
3990
532d4def 3991 ctx = alloc_nfs_open_context(dentry, FMODE_READ, NULL);
8867fe58
MS		 3992 if (IS_ERR(ctx))
3993 return PTR_ERR(ctx);
3994
aa9c2669
DQ		 3995 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3996
dff25ddb
AG		 3997 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
3998 sattr->ia_mode &= ~current_umask();
c5c3fb5f 3999 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, NULL);
1da177e4
LT		 4000 if (IS_ERR(state)) {
4001 status = PTR_ERR(state);
c0204fd2 4002 goto out;
1da177e4 4003 }
1da177e4 4004out:
aa9c2669 4005 nfs4_label_release_security(ilabel);
8867fe58 4006 put_nfs_open_context(ctx);
1da177e4
LT		 4007 return status;
4008}
4009
beffb8fe 4010static int _nfs4_proc_remove(struct inode *dir, const struct qstr *name)
1da177e4 4011{
16e42959 4012 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 4013 struct nfs_removeargs args = {
1da177e4 4014 .fh = NFS_FH(dir),
26fe5750 4015 .name = *name,
16e42959 4016 };
4fdc17b2 4017 struct nfs_removeres res = {
16e42959 4018 .server = server,
1da177e4 4019 };
1da177e4 4020 struct rpc_message msg = {
4fdc17b2
TM		 4021 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
4022 .rpc_argp = &args,
4023 .rpc_resp = &res,
1da177e4 4024 };
d3129ef6 4025 unsigned long timestamp = jiffies;
778d2817 4026 int status;
1da177e4 4027
7c513058 4028 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 4029 if (status == 0)
d3129ef6 4030 update_changeattr(dir, &res.cinfo, timestamp);
1da177e4
LT		 4031 return status;
4032}
4033
beffb8fe 4034static int nfs4_proc_remove(struct inode *dir, const struct qstr *name)
1da177e4
LT		 4035{
4036 struct nfs4_exception exception = { };
4037 int err;
4038 do {
078ea3df
TM		 4039 err = _nfs4_proc_remove(dir, name);
4040 trace_nfs4_remove(dir, name, err);
4041 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4042 &exception);
4043 } while (exception.retry);
4044 return err;
4045}
4046
e4eff1a6 4047static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 4048{
e4eff1a6
TM		 4049 struct nfs_server *server = NFS_SERVER(dir);
4050 struct nfs_removeargs *args = msg->rpc_argp;
4051 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 4052
e4eff1a6 4053 res->server = server;
1da177e4 4054 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
a9c92d6b 4055 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
aa9c2669
DQ		 4056
4057 nfs_fattr_init(res->dir_attr);
1da177e4
LT		 4058}
4059
34e137cc
BS		 4060static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
4061{
42e1cca7 4062 nfs4_setup_sequence(NFS_SB(data->dentry->d_sb)->nfs_client,
d9afbd1b
TM		 4063 &data->args.seq_args,
4064 &data->res.seq_res,
4065 task);
1da177e4
LT		 4066}
4067
e4eff1a6 4068static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 4069{
078ea3df
TM		 4070 struct nfs_unlinkdata *data = task->tk_calldata;
4071 struct nfs_removeres *res = &data->res;
e4eff1a6 4072
14516c3a
TM		 4073 if (!nfs4_sequence_done(task, &res->seq_res))
4074 return 0;
8478eaa1
N		 4075 if (nfs4_async_handle_error(task, res->server, NULL,
4076 &data->timeout) == -EAGAIN)
e4eff1a6 4077 return 0;
c40d52fe 4078 if (task->tk_status == 0)
d3129ef6 4079 update_changeattr(dir, &res->cinfo, res->dir_attr->time_start);
e4eff1a6 4080 return 1;
1da177e4
LT		 4081}
4082
d3d4152a
JL		 4083static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
4084{
4085 struct nfs_server *server = NFS_SERVER(dir);
4086 struct nfs_renameargs *arg = msg->rpc_argp;
4087 struct nfs_renameres *res = msg->rpc_resp;
4088
4089 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 4090 res->server = server;
a9c92d6b 4091 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 4092}
4093
c6bfa1a1
BS		 4094static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
4095{
42e1cca7 4096 nfs4_setup_sequence(NFS_SERVER(data->old_dir)->nfs_client,
d9afbd1b
TM		 4097 &data->args.seq_args,
4098 &data->res.seq_res,
4099 task);
d3d4152a
JL		 4100}
4101
4102static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
4103 struct inode *new_dir)
4104{
fbc6f7c2
TM		 4105 struct nfs_renamedata *data = task->tk_calldata;
4106 struct nfs_renameres *res = &data->res;
d3d4152a
JL		 4107
4108 if (!nfs4_sequence_done(task, &res->seq_res))
4109 return 0;
8478eaa1 4110 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
d3d4152a
JL		 4111 return 0;
4112
c733c49c 4113 if (task->tk_status == 0) {
d3129ef6 4114 update_changeattr(old_dir, &res->old_cinfo, res->old_fattr->time_start);
c733c49c 4115 if (new_dir != old_dir)
d3129ef6 4116 update_changeattr(new_dir, &res->new_cinfo, res->new_fattr->time_start);
c733c49c 4117 }
d3d4152a
JL		 4118 return 1;
4119}
4120
beffb8fe 4121static int _nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name)
1da177e4 4122{
91ba2eee 4123 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 4124 struct nfs4_link_arg arg = {
4125 .fh = NFS_FH(inode),
4126 .dir_fh = NFS_FH(dir),
4127 .name = name,
91ba2eee
TM		 4128 .bitmask = server->attr_bitmask,
4129 };
91ba2eee
TM		 4130 struct nfs4_link_res res = {
4131 .server = server,
1775fd3e 4132 .label = NULL,
1da177e4 4133 };
1da177e4
LT		 4134 struct rpc_message msg = {
4135 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
4136 .rpc_argp = &arg,
91ba2eee 4137 .rpc_resp = &res,
1da177e4 4138 };
136f2627
TM		 4139 int status = -ENOMEM;
4140
4141 res.fattr = nfs_alloc_fattr();
778d2817 4142 if (res.fattr == NULL)
136f2627 4143 goto out;
1da177e4 4144
14c43f76
DQ		 4145 res.label = nfs4_label_alloc(server, GFP_KERNEL);
4146 if (IS_ERR(res.label)) {
4147 status = PTR_ERR(res.label);
4148 goto out;
4149 }
aa9c2669 4150 arg.bitmask = nfs4_bitmask(server, res.label);
14c43f76 4151
7c513058 4152 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee 4153 if (!status) {
d3129ef6 4154 update_changeattr(dir, &res.cinfo, res.fattr->time_start);
aa9c2669
DQ		 4155 status = nfs_post_op_update_inode(inode, res.fattr);
4156 if (!status)
4157 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 4158 }
14c43f76
DQ		 4159
4160
4161 nfs4_label_free(res.label);
4162
136f2627 4163out:
136f2627 4164 nfs_free_fattr(res.fattr);
1da177e4
LT		 4165 return status;
4166}
4167
beffb8fe 4168static int nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name)
1da177e4
LT		 4169{
4170 struct nfs4_exception exception = { };
4171 int err;
4172 do {
4173 err = nfs4_handle_exception(NFS_SERVER(inode),
4174 _nfs4_proc_link(inode, dir, name),
4175 &exception);
4176 } while (exception.retry);
4177 return err;
4178}
4179
57dc9a57
TM		 4180struct nfs4_createdata {
4181 struct rpc_message msg;
4182 struct nfs4_create_arg arg;
4183 struct nfs4_create_res res;
4184 struct nfs_fh fh;
4185 struct nfs_fattr fattr;
1775fd3e 4186 struct nfs4_label *label;
57dc9a57
TM		 4187};
4188
4189static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
beffb8fe 4190 const struct qstr *name, struct iattr *sattr, u32 ftype)
57dc9a57
TM		 4191{
4192 struct nfs4_createdata *data;
4193
4194 data = kzalloc(sizeof(*data), GFP_KERNEL);
4195 if (data != NULL) {
4196 struct nfs_server *server = NFS_SERVER(dir);
4197
14c43f76
DQ		 4198 data->label = nfs4_label_alloc(server, GFP_KERNEL);
4199 if (IS_ERR(data->label))
4200 goto out_free;
4201
57dc9a57
TM		 4202 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
4203 data->msg.rpc_argp = &data->arg;
4204 data->msg.rpc_resp = &data->res;
4205 data->arg.dir_fh = NFS_FH(dir);
4206 data->arg.server = server;
4207 data->arg.name = name;
4208 data->arg.attrs = sattr;
4209 data->arg.ftype = ftype;
aa9c2669 4210 data->arg.bitmask = nfs4_bitmask(server, data->label);
dff25ddb 4211 data->arg.umask = current_umask();
57dc9a57
TM		 4212 data->res.server = server;
4213 data->res.fh = &data->fh;
4214 data->res.fattr = &data->fattr;
1775fd3e 4215 data->res.label = data->label;
57dc9a57 4216 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 4217 }
4218 return data;
14c43f76
DQ		 4219out_free:
4220 kfree(data);
4221 return NULL;
57dc9a57
TM		 4222}
4223
4224static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
4225{
7c513058 4226 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 4227 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57 4228 if (status == 0) {
d3129ef6
TM		 4229 update_changeattr(dir, &data->res.dir_cinfo,
4230 data->res.fattr->time_start);
1775fd3e 4231 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 4232 }
4233 return status;
4234}
4235
4236static void nfs4_free_createdata(struct nfs4_createdata *data)
4237{
14c43f76 4238 nfs4_label_free(data->label);
57dc9a57
TM		 4239 kfree(data);
4240}
4241
4f390c15 4242static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 4243 struct page *page, unsigned int len, struct iattr *sattr,
4244 struct nfs4_label *label)
1da177e4 4245{
57dc9a57
TM		 4246 struct nfs4_createdata *data;
4247 int status = -ENAMETOOLONG;
1da177e4 4248
94a6d753 4249 if (len > NFS4_MAXPATHLEN)
57dc9a57 4250 goto out;
4f390c15 4251
57dc9a57
TM		 4252 status = -ENOMEM;
4253 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
4254 if (data == NULL)
4255 goto out;
4256
4257 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
4258 data->arg.u.symlink.pages = &page;
4259 data->arg.u.symlink.len = len;
1775fd3e 4260 data->arg.label = label;
1da177e4 4261
57dc9a57
TM		 4262 status = nfs4_do_create(dir, dentry, data);
4263
4264 nfs4_free_createdata(data);
4265out:
1da177e4
LT		 4266 return status;
4267}
4268
4f390c15 4269static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 4270 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 4271{
4272 struct nfs4_exception exception = { };
aa9c2669 4273 struct nfs4_label l, *label = NULL;
1da177e4 4274 int err;
aa9c2669
DQ		 4275
4276 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4277
1da177e4 4278 do {
078ea3df
TM		 4279 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
4280 trace_nfs4_symlink(dir, &dentry->d_name, err);
4281 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4282 &exception);
4283 } while (exception.retry);
aa9c2669
DQ		 4284
4285 nfs4_label_release_security(label);
1da177e4
LT		 4286 return err;
4287}
4288
4289static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 4290 struct iattr *sattr, struct nfs4_label *label)
1da177e4 4291{
57dc9a57
TM		 4292 struct nfs4_createdata *data;
4293 int status = -ENOMEM;
1da177e4 4294
57dc9a57
TM		 4295 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
4296 if (data == NULL)
4297 goto out;
4298
1775fd3e 4299 data->arg.label = label;
57dc9a57
TM		 4300 status = nfs4_do_create(dir, dentry, data);
4301
4302 nfs4_free_createdata(data);
4303out:
1da177e4
LT		 4304 return status;
4305}
4306
4307static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
4308 struct iattr *sattr)
4309{
dff25ddb 4310 struct nfs_server *server = NFS_SERVER(dir);
1da177e4 4311 struct nfs4_exception exception = { };
aa9c2669 4312 struct nfs4_label l, *label = NULL;
1da177e4 4313 int err;
a8a5da99 4314
aa9c2669
DQ		 4315 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4316
dff25ddb
AG		 4317 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
4318 sattr->ia_mode &= ~current_umask();
1da177e4 4319 do {
078ea3df
TM		 4320 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
4321 trace_nfs4_mkdir(dir, &dentry->d_name, err);
4322 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4323 &exception);
4324 } while (exception.retry);
aa9c2669
DQ		 4325 nfs4_label_release_security(label);
4326
1da177e4
LT		 4327 return err;
4328}
4329
4330static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
a7a3b1e9 4331 u64 cookie, struct page **pages, unsigned int count, bool plus)
1da177e4 4332{
2b0143b5 4333 struct inode *dir = d_inode(dentry);
1da177e4
LT		 4334 struct nfs4_readdir_arg args = {
4335 .fh = NFS_FH(dir),
56e4ebf8 4336 .pages = pages,
1da177e4
LT		 4337 .pgbase = 0,
4338 .count = count,
2b0143b5 4339 .bitmask = NFS_SERVER(d_inode(dentry))->attr_bitmask,
82f2e547 4340 .plus = plus,
1da177e4
LT		 4341 };
4342 struct nfs4_readdir_res res;
4343 struct rpc_message msg = {
4344 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
4345 .rpc_argp = &args,
4346 .rpc_resp = &res,
4347 .rpc_cred = cred,
4348 };
4349 int status;
4350
6de1472f
AV		 4351 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
4352 dentry,
eadf4598 4353 (unsigned long long)cookie);
c3f52af3 4354 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 4355 res.pgbase = args.pgbase;
7c513058 4356 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 4357 if (status >= 0) {
c3f52af3 4358 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 4359 status += args.pgbase;
4360 }
c4812998
TM		 4361
4362 nfs_invalidate_atime(dir);
4363
3110ff80 4364 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 4365 return status;
4366}
4367
4368static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
a7a3b1e9 4369 u64 cookie, struct page **pages, unsigned int count, bool plus)
1da177e4
LT		 4370{
4371 struct nfs4_exception exception = { };
4372 int err;
4373 do {
c1578b76
TM		 4374 err = _nfs4_proc_readdir(dentry, cred, cookie,
4375 pages, count, plus);
2b0143b5
DH		 4376 trace_nfs4_readdir(d_inode(dentry), err);
4377 err = nfs4_handle_exception(NFS_SERVER(d_inode(dentry)), err,
1da177e4
LT		 4378 &exception);
4379 } while (exception.retry);
4380 return err;
4381}
4382
4383static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 4384 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 4385{
57dc9a57
TM		 4386 struct nfs4_createdata *data;
4387 int mode = sattr->ia_mode;
4388 int status = -ENOMEM;
1da177e4 4389
57dc9a57
TM		 4390 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
4391 if (data == NULL)
4392 goto out;
4393
1da177e4 4394 if (S_ISFIFO(mode))
57dc9a57 4395 data->arg.ftype = NF4FIFO;
1da177e4 4396 else if (S_ISBLK(mode)) {
57dc9a57
TM		 4397 data->arg.ftype = NF4BLK;
4398 data->arg.u.device.specdata1 = MAJOR(rdev);
4399 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 4400 }
4401 else if (S_ISCHR(mode)) {
57dc9a57
TM		 4402 data->arg.ftype = NF4CHR;
4403 data->arg.u.device.specdata1 = MAJOR(rdev);
4404 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 4405 } else if (!S_ISSOCK(mode)) {
4406 status = -EINVAL;
4407 goto out_free;
1da177e4 4408 }
1775fd3e 4409
aa9c2669 4410 data->arg.label = label;
57dc9a57 4411 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 4412out_free:
57dc9a57
TM		 4413 nfs4_free_createdata(data);
4414out:
1da177e4
LT		 4415 return status;
4416}
4417
4418static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
4419 struct iattr *sattr, dev_t rdev)
4420{
dff25ddb 4421 struct nfs_server *server = NFS_SERVER(dir);
1da177e4 4422 struct nfs4_exception exception = { };
aa9c2669 4423 struct nfs4_label l, *label = NULL;
1da177e4 4424 int err;
a8a5da99 4425
aa9c2669
DQ		 4426 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4427
dff25ddb
AG		 4428 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
4429 sattr->ia_mode &= ~current_umask();
1da177e4 4430 do {
078ea3df
TM		 4431 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
4432 trace_nfs4_mknod(dir, &dentry->d_name, err);
4433 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4434 &exception);
4435 } while (exception.retry);
aa9c2669
DQ		 4436
4437 nfs4_label_release_security(label);
4438
1da177e4
LT		 4439 return err;
4440}
4441
4442static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
4443 struct nfs_fsstat *fsstat)
4444{
4445 struct nfs4_statfs_arg args = {
4446 .fh = fhandle,
4447 .bitmask = server->attr_bitmask,
4448 };
24ad148a
BH		 4449 struct nfs4_statfs_res res = {
4450 .fsstat = fsstat,
4451 };
1da177e4
LT		 4452 struct rpc_message msg = {
4453 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
4454 .rpc_argp = &args,
24ad148a 4455 .rpc_resp = &res,
1da177e4
LT		 4456 };
4457
0e574af1 4458 nfs_fattr_init(fsstat->fattr);
7c513058 4459 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4460}
4461
4462static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
4463{
4464 struct nfs4_exception exception = { };
4465 int err;
4466 do {
4467 err = nfs4_handle_exception(server,
4468 _nfs4_proc_statfs(server, fhandle, fsstat),
4469 &exception);
4470 } while (exception.retry);
4471 return err;
4472}
4473
4474static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
4475 struct nfs_fsinfo *fsinfo)
4476{
4477 struct nfs4_fsinfo_arg args = {
4478 .fh = fhandle,
4479 .bitmask = server->attr_bitmask,
4480 };
3dda5e43
BH		 4481 struct nfs4_fsinfo_res res = {
4482 .fsinfo = fsinfo,
4483 };
1da177e4
LT		 4484 struct rpc_message msg = {
4485 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
4486 .rpc_argp = &args,
3dda5e43 4487 .rpc_resp = &res,
1da177e4
LT		 4488 };
4489
7c513058 4490 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4491}
4492
4493static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4494{
4495 struct nfs4_exception exception = { };
83ca7f5a 4496 unsigned long now = jiffies;
1da177e4
LT		 4497 int err;
4498
4499 do {
83ca7f5a 4500 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
b5f875a9 4501 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
83ca7f5a 4502 if (err == 0) {
fb10fb67
TM		 4503 nfs4_set_lease_period(server->nfs_client,
4504 fsinfo->lease_time * HZ,
4505 now);
83ca7f5a
CL		 4506 break;
4507 }
4508 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 4509 } while (exception.retry);
4510 return err;
4511}
4512
4513static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4514{
e38eb650
BS		 4515 int error;
4516
0e574af1 4517 nfs_fattr_init(fsinfo->fattr);
e38eb650 4518 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 4519 if (error == 0) {
4520 /* block layout checks this! */
4521 server->pnfs_blksize = fsinfo->blksize;
ca440c38 4522 set_pnfs_layoutdriver(server, fhandle, fsinfo);
dc182549 4523 }
e38eb650
BS		 4524
4525 return error;
1da177e4
LT		 4526}
4527
4528static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4529 struct nfs_pathconf *pathconf)
4530{
4531 struct nfs4_pathconf_arg args = {
4532 .fh = fhandle,
4533 .bitmask = server->attr_bitmask,
4534 };
d45b2989
BH		 4535 struct nfs4_pathconf_res res = {
4536 .pathconf = pathconf,
4537 };
1da177e4
LT		 4538 struct rpc_message msg = {
4539 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
4540 .rpc_argp = &args,
d45b2989 4541 .rpc_resp = &res,
1da177e4
LT		 4542 };
4543
4544 /* None of the pathconf attributes are mandatory to implement */
4545 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
4546 memset(pathconf, 0, sizeof(*pathconf));
4547 return 0;
4548 }
4549
0e574af1 4550 nfs_fattr_init(pathconf->fattr);
7c513058 4551 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4552}
4553
4554static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4555 struct nfs_pathconf *pathconf)
4556{
4557 struct nfs4_exception exception = { };
4558 int err;
4559
4560 do {
4561 err = nfs4_handle_exception(server,
4562 _nfs4_proc_pathconf(server, fhandle, pathconf),
4563 &exception);
4564 } while (exception.retry);
4565 return err;
4566}
4567
5521abfd 4568int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 4569 const struct nfs_open_context *ctx,
4570 const struct nfs_lock_context *l_ctx,
4571 fmode_t fmode)
4572{
17393475 4573 return nfs4_select_rw_stateid(ctx->state, fmode, l_ctx, stateid, NULL);
9b206149
TM		 4574}
4575EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4576
5521abfd
TM		 4577static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4578 const struct nfs_open_context *ctx,
4579 const struct nfs_lock_context *l_ctx,
4580 fmode_t fmode)
4581{
4582 nfs4_stateid current_stateid;
4583
e1253be0
TM		 4584 /* If the current stateid represents a lost lock, then exit */
4585 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode) == -EIO)
4586 return true;
5521abfd
TM		 4587 return nfs4_stateid_match(stateid, &current_stateid);
4588}
4589
4590static bool nfs4_error_stateid_expired(int err)
4591{
4592 switch (err) {
4593 case -NFS4ERR_DELEG_REVOKED:
4594 case -NFS4ERR_ADMIN_REVOKED:
4595 case -NFS4ERR_BAD_STATEID:
4596 case -NFS4ERR_STALE_STATEID:
4597 case -NFS4ERR_OLD_STATEID:
4598 case -NFS4ERR_OPENMODE:
4599 case -NFS4ERR_EXPIRED:
4600 return true;
4601 }
4602 return false;
4603}
4604
d45f60c6 4605static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
1da177e4 4606{
d45f60c6 4607 struct nfs_server *server = NFS_SERVER(hdr->inode);
1da177e4 4608
d45f60c6 4609 trace_nfs4_read(hdr, task->tk_status);
9c27869d
TM		 4610 if (task->tk_status < 0) {
4611 struct nfs4_exception exception = {
4612 .inode = hdr->inode,
4613 .state = hdr->args.context->state,
4614 .stateid = &hdr->args.stateid,
4615 };
4616 task->tk_status = nfs4_async_handle_exception(task,
4617 server, task->tk_status, &exception);
4618 if (exception.retry) {
4619 rpc_restart_call_prepare(task);
4620 return -EAGAIN;
4621 }
1da177e4 4622 }
8850df99 4623
1da177e4 4624 if (task->tk_status > 0)
d45f60c6 4625 renew_lease(server, hdr->timestamp);
ec06c096 4626 return 0;
1da177e4
LT		 4627}
4628
5521abfd 4629static bool nfs4_read_stateid_changed(struct rpc_task *task,
3c6b899c 4630 struct nfs_pgio_args *args)
5521abfd
TM		 4631{
4632
4633 if (!nfs4_error_stateid_expired(task->tk_status) ||
4634 nfs4_stateid_is_current(&args->stateid,
4635 args->context,
4636 args->lock_context,
4637 FMODE_READ))
4638 return false;
4639 rpc_restart_call_prepare(task);
4640 return true;
4641}
4642
d45f60c6 4643static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
cbdabc7f
AA		 4644{
4645
4646 dprintk("--> %s\n", __func__);
4647
d45f60c6 4648 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
cbdabc7f 4649 return -EAGAIN;
d45f60c6 4650 if (nfs4_read_stateid_changed(task, &hdr->args))
5521abfd 4651 return -EAGAIN;
bfc505de
TM		 4652 if (task->tk_status > 0)
4653 nfs_invalidate_atime(hdr->inode);
d45f60c6
WAA		 4654 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4655 nfs4_read_done_cb(task, hdr);
cbdabc7f
AA		 4656}
4657
d45f60c6
WAA		 4658static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
4659 struct rpc_message *msg)
1da177e4 4660{
d45f60c6 4661 hdr->timestamp = jiffies;
ca857cc1
TM		 4662 if (!hdr->pgio_done_cb)
4663 hdr->pgio_done_cb = nfs4_read_done_cb;
bdc7f021 4664 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
d45f60c6 4665 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
1da177e4
LT		 4666}
4667
d45f60c6
WAA		 4668static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
4669 struct nfs_pgio_header *hdr)
ea7c3303 4670{
42e1cca7 4671 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode)->nfs_client,
d45f60c6
WAA		 4672 &hdr->args.seq_args,
4673 &hdr->res.seq_res,
9b206149 4674 task))
ef1820f9 4675 return 0;
d45f60c6
WAA		 4676 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
4677 hdr->args.lock_context,
fbe77c30 4678 hdr->rw_mode) == -EIO)
ef1820f9 4679 return -EIO;
d45f60c6 4680 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
ef1820f9
N		 4681 return -EIO;
4682 return 0;
1da177e4
LT		 4683}
4684
d45f60c6
WAA		 4685static int nfs4_write_done_cb(struct rpc_task *task,
4686 struct nfs_pgio_header *hdr)
1da177e4 4687{
d45f60c6 4688 struct inode *inode = hdr->inode;
8478eaa1 4689
d45f60c6 4690 trace_nfs4_write(hdr, task->tk_status);
9c27869d
TM		 4691 if (task->tk_status < 0) {
4692 struct nfs4_exception exception = {
4693 .inode = hdr->inode,
4694 .state = hdr->args.context->state,
4695 .stateid = &hdr->args.stateid,
4696 };
4697 task->tk_status = nfs4_async_handle_exception(task,
4698 NFS_SERVER(inode), task->tk_status,
4699 &exception);
4700 if (exception.retry) {
4701 rpc_restart_call_prepare(task);
4702 return -EAGAIN;
4703 }
1da177e4 4704 }
4f9838c7 4705 if (task->tk_status >= 0) {
d45f60c6 4706 renew_lease(NFS_SERVER(inode), hdr->timestamp);
a08a8cd3 4707 nfs_writeback_update_inode(hdr);
4f9838c7 4708 }
788e7a89 4709 return 0;
1da177e4
LT		 4710}
4711
5521abfd 4712static bool nfs4_write_stateid_changed(struct rpc_task *task,
3c6b899c 4713 struct nfs_pgio_args *args)
5521abfd
TM		 4714{
4715
4716 if (!nfs4_error_stateid_expired(task->tk_status) ||
4717 nfs4_stateid_is_current(&args->stateid,
4718 args->context,
4719 args->lock_context,
4720 FMODE_WRITE))
4721 return false;
4722 rpc_restart_call_prepare(task);
4723 return true;
4724}
4725
d45f60c6 4726static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
b029bc9b 4727{
d45f60c6 4728 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
b029bc9b 4729 return -EAGAIN;
d45f60c6 4730 if (nfs4_write_stateid_changed(task, &hdr->args))
5521abfd 4731 return -EAGAIN;
d45f60c6
WAA		 4732 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4733 nfs4_write_done_cb(task, hdr);
b029bc9b
FI		 4734}
4735
5a37f851 4736static
d45f60c6 4737bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
a69aef14 4738{
5a37f851 4739 /* Don't request attributes for pNFS or O_DIRECT writes */
d45f60c6 4740 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
5a37f851
TM		 4741 return false;
4742 /* Otherwise, request attributes if and only if we don't hold
4743 * a delegation
4744 */
011e2a7f 4745 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 4746}
a69aef14 4747
d45f60c6
WAA		 4748static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
4749 struct rpc_message *msg)
1da177e4 4750{
d45f60c6 4751 struct nfs_server *server = NFS_SERVER(hdr->inode);
bdc7f021 4752
d45f60c6
WAA		 4753 if (!nfs4_write_need_cache_consistency_data(hdr)) {
4754 hdr->args.bitmask = NULL;
4755 hdr->res.fattr = NULL;
7ffd1064 4756 } else
d45f60c6 4757 hdr->args.bitmask = server->cache_consistency_bitmask;
5a37f851 4758
d45f60c6
WAA		 4759 if (!hdr->pgio_done_cb)
4760 hdr->pgio_done_cb = nfs4_write_done_cb;
4761 hdr->res.server = server;
4762 hdr->timestamp = jiffies;
1da177e4 4763
bdc7f021 4764 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
d45f60c6 4765 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
1da177e4
LT		 4766}
4767
0b7c0153 4768static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 4769{
42e1cca7 4770 nfs4_setup_sequence(NFS_SERVER(data->inode)->nfs_client,
d9afbd1b
TM		 4771 &data->args.seq_args,
4772 &data->res.seq_res,
4773 task);
1da177e4
LT		 4774}
4775
0b7c0153 4776static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 4777{
1da177e4 4778 struct inode *inode = data->inode;
14516c3a 4779
cc668ab3 4780 trace_nfs4_commit(data, task->tk_status);
8478eaa1
N		 4781 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4782 NULL, NULL) == -EAGAIN) {
d00c5d43 4783 rpc_restart_call_prepare(task);
788e7a89 4784 return -EAGAIN;
1da177e4 4785 }
788e7a89 4786 return 0;
1da177e4
LT		 4787}
4788
0b7c0153 4789static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 4790{
4791 if (!nfs4_sequence_done(task, &data->res.seq_res))
4792 return -EAGAIN;
0b7c0153 4793 return data->commit_done_cb(task, data);
5f452431
FI		 4794}
4795
0b7c0153 4796static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 4797{
788e7a89 4798 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 4799
0b7c0153
FI		 4800 if (data->commit_done_cb == NULL)
4801 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 4802 data->res.server = server;
bdc7f021 4803 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
a9c92d6b 4804 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4805}
4806
9bc4e3ca
CL		 4807struct nfs4_renewdata {
4808 struct nfs_client *client;
4809 unsigned long timestamp;
4810};
4811
1da177e4
LT		 4812/*
4813 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4814 * standalone procedure for queueing an asynchronous RENEW.
4815 */
9bc4e3ca 4816static void nfs4_renew_release(void *calldata)
dc96aef9 4817{
9bc4e3ca
CL		 4818 struct nfs4_renewdata *data = calldata;
4819 struct nfs_client *clp = data->client;
dc96aef9 4820
0851de06
AB		 4821 if (atomic_read(&clp->cl_count) > 1)
4822 nfs4_schedule_state_renewal(clp);
4823 nfs_put_client(clp);
9bc4e3ca 4824 kfree(data);
dc96aef9
AB		 4825}
4826
9bc4e3ca 4827static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 4828{
9bc4e3ca
CL		 4829 struct nfs4_renewdata *data = calldata;
4830 struct nfs_client *clp = data->client;
4831 unsigned long timestamp = data->timestamp;
1da177e4 4832
c6d01c6f 4833 trace_nfs4_renew_async(clp, task->tk_status);
f8aba1e8
CL		 4834 switch (task->tk_status) {
4835 case 0:
4836 break;
4837 case -NFS4ERR_LEASE_MOVED:
4838 nfs4_schedule_lease_moved_recovery(clp);
4839 break;
4840 default:
95baa25c 4841 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 4842 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4843 return;
4844 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 4845 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 4846 return;
4847 }
4848 nfs4_schedule_path_down_recovery(clp);
1da177e4 4849 }
452e9352 4850 do_renew_lease(clp, timestamp);
1da177e4
LT		 4851}
4852
963d8fe5
TM		 4853static const struct rpc_call_ops nfs4_renew_ops = {
4854 .rpc_call_done = nfs4_renew_done,
dc96aef9 4855 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 4856};
4857
2f60ea6b 4858static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 4859{
4860 struct rpc_message msg = {
4861 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4862 .rpc_argp = clp,
b4454fe1 4863 .rpc_cred = cred,
1da177e4 4864 };
9bc4e3ca 4865 struct nfs4_renewdata *data;
1da177e4 4866
2f60ea6b
TM		 4867 if (renew_flags == 0)
4868 return 0;
0851de06
AB		 4869 if (!atomic_inc_not_zero(&clp->cl_count))
4870 return -EIO;
b569ad34 4871 data = kmalloc(sizeof(*data), GFP_NOFS);
5c737cb2
DW		 4872 if (data == NULL) {
4873 nfs_put_client(clp);
9bc4e3ca 4874 return -ENOMEM;
5c737cb2 4875 }
9bc4e3ca
CL		 4876 data->client = clp;
4877 data->timestamp = jiffies;
bc7a05ca 4878 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 4879 &nfs4_renew_ops, data);
1da177e4
LT		 4880}
4881
8534d4ec 4882static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 4883{
4884 struct rpc_message msg = {
4885 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4886 .rpc_argp = clp,
b4454fe1 4887 .rpc_cred = cred,
1da177e4
LT		 4888 };
4889 unsigned long now = jiffies;
4890 int status;
4891
bc7a05ca 4892 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4893 if (status < 0)
4894 return status;
452e9352 4895 do_renew_lease(clp, now);
1da177e4
LT		 4896 return 0;
4897}
4898
aa1870af
BF		 4899static inline int nfs4_server_supports_acls(struct nfs_server *server)
4900{
7dd7d959 4901 return server->caps & NFS_CAP_ACLS;
aa1870af
BF		 4902}
4903
21f498c2
TM		 4904/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4905 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 4906 * the stack.
4907 */
21f498c2 4908#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 4909
e9e3d724 4910static int buf_to_pages_noslab(const void *buf, size_t buflen,
8fbcf237 4911 struct page **pages)
e9e3d724
NH		 4912{
4913 struct page *newpage, **spages;
4914 int rc = 0;
4915 size_t len;
4916 spages = pages;
4917
4918 do {
21f498c2 4919 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 4920 newpage = alloc_page(GFP_KERNEL);
4921
4922 if (newpage == NULL)
4923 goto unwind;
4924 memcpy(page_address(newpage), buf, len);
d9b67e1e
AS		 4925 buf += len;
4926 buflen -= len;
e9e3d724
NH		 4927 *pages++ = newpage;
4928 rc++;
4929 } while (buflen != 0);
4930
4931 return rc;
4932
4933unwind:
4934 for(; rc > 0; rc--)
4935 __free_page(spages[rc-1]);
4936 return -ENOMEM;
4937}
4938
e50a1c2e
BF		 4939struct nfs4_cached_acl {
4940 int cached;
4941 size_t len;
3e9d4154 4942 char data[0];
e50a1c2e
BF		 4943};
4944
4945static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4946{
4947 struct nfs_inode *nfsi = NFS_I(inode);
4948
4949 spin_lock(&inode->i_lock);
4950 kfree(nfsi->nfs4_acl);
4951 nfsi->nfs4_acl = acl;
4952 spin_unlock(&inode->i_lock);
4953}
4954
4955static void nfs4_zap_acl_attr(struct inode *inode)
4956{
4957 nfs4_set_cached_acl(inode, NULL);
4958}
4959
4960static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4961{
4962 struct nfs_inode *nfsi = NFS_I(inode);
4963 struct nfs4_cached_acl *acl;
4964 int ret = -ENOENT;
4965
4966 spin_lock(&inode->i_lock);
4967 acl = nfsi->nfs4_acl;
4968 if (acl == NULL)
4969 goto out;
4970 if (buf == NULL) /* user is just asking for length */
4971 goto out_len;
4972 if (acl->cached == 0)
4973 goto out;
4974 ret = -ERANGE; /* see getxattr(2) man page */
4975 if (acl->len > buflen)
4976 goto out;
4977 memcpy(buf, acl->data, acl->len);
4978out_len:
4979 ret = acl->len;
4980out:
4981 spin_unlock(&inode->i_lock);
4982 return ret;
4983}
4984
5794d21e 4985static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 4986{
4987 struct nfs4_cached_acl *acl;
b291f1b1 4988 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 4989
1f1ea6c2 4990 if (buflen <= PAGE_SIZE) {
b291f1b1 4991 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 4992 if (acl == NULL)
4993 goto out;
4994 acl->cached = 1;
5794d21e 4995 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 4996 } else {
4997 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4998 if (acl == NULL)
4999 goto out;
5000 acl->cached = 0;
5001 }
5002 acl->len = acl_len;
5003out:
5004 nfs4_set_cached_acl(inode, acl);
5005}
5006
bf118a34
AA		 5007/*
5008 * The getxattr API returns the required buffer length when called with a
5009 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
5010 * the required buf. On a NULL buf, we send a page of data to the server
5011 * guessing that the ACL request can be serviced by a page. If so, we cache
5012 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
5013 * the cache. If not so, we throw away the page, and cache the required
5014 * length. The next getxattr call will then produce another round trip to
5015 * the server, this time with the input buf of the required size.
5016 */
16b4289c 5017static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 5018{
ed92d8c1 5019 struct page *pages[NFS4ACL_MAXPAGES + 1] = {NULL, };
aa1870af
BF		 5020 struct nfs_getaclargs args = {
5021 .fh = NFS_FH(inode),
5022 .acl_pages = pages,
5023 .acl_len = buflen,
5024 };
663c79b3
BH		 5025 struct nfs_getaclres res = {
5026 .acl_len = buflen,
5027 };
aa1870af
BF		 5028 struct rpc_message msg = {
5029 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
5030 .rpc_argp = &args,
663c79b3 5031 .rpc_resp = &res,
aa1870af 5032 };
ed92d8c1 5033 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE) + 1;
21f498c2 5034 int ret = -ENOMEM, i;
aa1870af 5035
21f498c2
TM		 5036 if (npages > ARRAY_SIZE(pages))
5037 return -ERANGE;
5a006899 5038
bf118a34
AA		 5039 for (i = 0; i < npages; i++) {
5040 pages[i] = alloc_page(GFP_KERNEL);
5041 if (!pages[i])
5042 goto out_free;
e50a1c2e 5043 }
5a006899
SP		 5044
5045 /* for decoding across pages */
5046 res.acl_scratch = alloc_page(GFP_KERNEL);
5047 if (!res.acl_scratch)
5048 goto out_free;
5049
bf118a34 5050 args.acl_len = npages * PAGE_SIZE;
5a006899 5051
de040bec 5052 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 5053 __func__, buf, buflen, npages, args.acl_len);
5054 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
5055 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 5056 if (ret)
5057 goto out_free;
bf118a34 5058
1f1ea6c2
TM		 5059 /* Handle the case where the passed-in buffer is too short */
5060 if (res.acl_flags & NFS4_ACL_TRUNC) {
5061 /* Did the user only issue a request for the acl length? */
5062 if (buf == NULL)
5063 goto out_ok;
e50a1c2e 5064 ret = -ERANGE;
1f1ea6c2 5065 goto out_free;
e50a1c2e 5066 }
1f1ea6c2 5067 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 5068 if (buf) {
5069 if (res.acl_len > buflen) {
5070 ret = -ERANGE;
5071 goto out_free;
5072 }
1f1ea6c2 5073 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 5074 }
1f1ea6c2
TM		 5075out_ok:
5076 ret = res.acl_len;
e50a1c2e 5077out_free:
bf118a34
AA		 5078 for (i = 0; i < npages; i++)
5079 if (pages[i])
5080 __free_page(pages[i]);
331818f1
TM		 5081 if (res.acl_scratch)
5082 __free_page(res.acl_scratch);
aa1870af
BF		 5083 return ret;
5084}
5085
16b4289c
TM		 5086static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
5087{
5088 struct nfs4_exception exception = { };
5089 ssize_t ret;
5090 do {
5091 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
c1578b76 5092 trace_nfs4_get_acl(inode, ret);
16b4289c
TM		 5093 if (ret >= 0)
5094 break;
5095 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
5096 } while (exception.retry);
5097 return ret;
5098}
5099
e50a1c2e
BF		 5100static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
5101{
5102 struct nfs_server *server = NFS_SERVER(inode);
5103 int ret;
5104
5105 if (!nfs4_server_supports_acls(server))
5106 return -EOPNOTSUPP;
5107 ret = nfs_revalidate_inode(server, inode);
5108 if (ret < 0)
5109 return ret;
08a22b39
AK		 5110 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
5111 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 5112 ret = nfs4_read_cached_acl(inode, buf, buflen);
5113 if (ret != -ENOENT)
bf118a34
AA		 5114 /* -ENOENT is returned if there is no ACL or if there is an ACL
5115 * but no cached acl data, just the acl length */
e50a1c2e
BF		 5116 return ret;
5117 return nfs4_get_acl_uncached(inode, buf, buflen);
5118}
5119
16b4289c 5120static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 5121{
5122 struct nfs_server *server = NFS_SERVER(inode);
5123 struct page *pages[NFS4ACL_MAXPAGES];
5124 struct nfs_setaclargs arg = {
5125 .fh = NFS_FH(inode),
5126 .acl_pages = pages,
5127 .acl_len = buflen,
5128 };
73c403a9 5129 struct nfs_setaclres res;
4b580ee3
BF		 5130 struct rpc_message msg = {
5131 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
5132 .rpc_argp = &arg,
73c403a9 5133 .rpc_resp = &res,
4b580ee3 5134 };
21f498c2 5135 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 5136 int ret, i;
4b580ee3
BF		 5137
5138 if (!nfs4_server_supports_acls(server))
5139 return -EOPNOTSUPP;
21f498c2
TM		 5140 if (npages > ARRAY_SIZE(pages))
5141 return -ERANGE;
8fbcf237 5142 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages);
e9e3d724
NH		 5143 if (i < 0)
5144 return i;
57ec14c5 5145 nfs4_inode_return_delegation(inode);
7c513058 5146 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 5147
5148 /*
5149 * Free each page after tx, so the only ref left is
5150 * held by the network stack
5151 */
5152 for (; i > 0; i--)
5153 put_page(pages[i-1]);
5154
08a22b39
AK		 5155 /*
5156 * Acl update can result in inode attribute update.
5157 * so mark the attribute cache invalid.
5158 */
5159 spin_lock(&inode->i_lock);
5160 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
5161 spin_unlock(&inode->i_lock);
f41f7418
TM		 5162 nfs_access_zap_cache(inode);
5163 nfs_zap_acl_cache(inode);
4b580ee3
BF		 5164 return ret;
5165}
5166
16b4289c
TM		 5167static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
5168{
5169 struct nfs4_exception exception = { };
5170 int err;
5171 do {
c1578b76
TM		 5172 err = __nfs4_proc_set_acl(inode, buf, buflen);
5173 trace_nfs4_set_acl(inode, err);
5174 err = nfs4_handle_exception(NFS_SERVER(inode), err,
16b4289c
TM		 5175 &exception);
5176 } while (exception.retry);
5177 return err;
5178}
5179
aa9c2669
DQ		 5180#ifdef CONFIG_NFS_V4_SECURITY_LABEL
5181static int _nfs4_get_security_label(struct inode *inode, void *buf,
5182 size_t buflen)
5183{
5184 struct nfs_server *server = NFS_SERVER(inode);
5185 struct nfs_fattr fattr;
5186 struct nfs4_label label = {0, 0, buflen, buf};
5187
5188 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
fcb63a9b 5189 struct nfs4_getattr_arg arg = {
aa9c2669
DQ		 5190 .fh = NFS_FH(inode),
5191 .bitmask = bitmask,
5192 };
5193 struct nfs4_getattr_res res = {
5194 .fattr = &fattr,
5195 .label = &label,
5196 .server = server,
5197 };
5198 struct rpc_message msg = {
5199 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
fcb63a9b 5200 .rpc_argp = &arg,
aa9c2669
DQ		 5201 .rpc_resp = &res,
5202 };
5203 int ret;
5204
5205 nfs_fattr_init(&fattr);
5206
fcb63a9b 5207 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
aa9c2669
DQ		 5208 if (ret)
5209 return ret;
5210 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
5211 return -ENOENT;
5212 if (buflen < label.len)
5213 return -ERANGE;
5214 return 0;
5215}
5216
5217static int nfs4_get_security_label(struct inode *inode, void *buf,
5218 size_t buflen)
5219{
5220 struct nfs4_exception exception = { };
5221 int err;
5222
5223 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
5224 return -EOPNOTSUPP;
5225
5226 do {
c1578b76
TM		 5227 err = _nfs4_get_security_label(inode, buf, buflen);
5228 trace_nfs4_get_security_label(inode, err);
5229 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 5230 &exception);
5231 } while (exception.retry);
5232 return err;
5233}
5234
5235static int _nfs4_do_set_security_label(struct inode *inode,
5236 struct nfs4_label *ilabel,
5237 struct nfs_fattr *fattr,
5238 struct nfs4_label *olabel)
5239{
5240
5241 struct iattr sattr = {0};
5242 struct nfs_server *server = NFS_SERVER(inode);
5243 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
12207f69 5244 struct nfs_setattrargs arg = {
d9b67e1e
AS		 5245 .fh = NFS_FH(inode),
5246 .iap = &sattr,
aa9c2669
DQ		 5247 .server = server,
5248 .bitmask = bitmask,
5249 .label = ilabel,
5250 };
5251 struct nfs_setattrres res = {
5252 .fattr = fattr,
5253 .label = olabel,
5254 .server = server,
5255 };
5256 struct rpc_message msg = {
d9b67e1e
AS		 5257 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
5258 .rpc_argp = &arg,
5259 .rpc_resp = &res,
aa9c2669
DQ		 5260 };
5261 int status;
5262
12207f69 5263 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
aa9c2669 5264
12207f69 5265 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
aa9c2669
DQ		 5266 if (status)
5267 dprintk("%s failed: %d\n", __func__, status);
5268
5269 return status;
5270}
5271
5272static int nfs4_do_set_security_label(struct inode *inode,
5273 struct nfs4_label *ilabel,
5274 struct nfs_fattr *fattr,
5275 struct nfs4_label *olabel)
5276{
5277 struct nfs4_exception exception = { };
5278 int err;
5279
5280 do {
c1578b76
TM		 5281 err = _nfs4_do_set_security_label(inode, ilabel,
5282 fattr, olabel);
5283 trace_nfs4_set_security_label(inode, err);
5284 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 5285 &exception);
5286 } while (exception.retry);
5287 return err;
5288}
5289
5290static int
59301226 5291nfs4_set_security_label(struct inode *inode, const void *buf, size_t buflen)
aa9c2669
DQ		 5292{
5293 struct nfs4_label ilabel, *olabel = NULL;
5294 struct nfs_fattr fattr;
5295 struct rpc_cred *cred;
aa9c2669
DQ		 5296 int status;
5297
5298 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
5299 return -EOPNOTSUPP;
5300
5301 nfs_fattr_init(&fattr);
5302
5303 ilabel.pi = 0;
5304 ilabel.lfs = 0;
5305 ilabel.label = (char *)buf;
5306 ilabel.len = buflen;
5307
5308 cred = rpc_lookup_cred();
5309 if (IS_ERR(cred))
5310 return PTR_ERR(cred);
5311
5312 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
5313 if (IS_ERR(olabel)) {
5314 status = -PTR_ERR(olabel);
5315 goto out;
5316 }
5317
5318 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
5319 if (status == 0)
5320 nfs_setsecurity(inode, &fattr, olabel);
5321
5322 nfs4_label_free(olabel);
5323out:
5324 put_rpccred(cred);
5325 return status;
5326}
5327#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
5328
5329
f092075d
CL		 5330static void nfs4_init_boot_verifier(const struct nfs_client *clp,
5331 nfs4_verifier *bootverf)
cd93710e
CL		 5332{
5333 __be32 verf[2];
5334
2c820d9a
CL		 5335 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
5336 /* An impossible timestamp guarantees this value
5337 * will never match a generated boot time. */
2f86e091
DD		 5338 verf[0] = cpu_to_be32(U32_MAX);
5339 verf[1] = cpu_to_be32(U32_MAX);
2c820d9a 5340 } else {
f092075d 5341 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
2f86e091
DD		 5342 u64 ns = ktime_to_ns(nn->boot_time);
5343
5344 verf[0] = cpu_to_be32(ns >> 32);
5345 verf[1] = cpu_to_be32(ns);
2c820d9a 5346 }
cd93710e
CL		 5347 memcpy(bootverf->data, verf, sizeof(bootverf->data));
5348}
5349
a3192688
JL		 5350static int
5351nfs4_init_nonuniform_client_string(struct nfs_client *clp)
e984a55a 5352{
a3192688
JL		 5353 size_t len;
5354 char *str;
e984a55a 5355
ceb3a16c 5356 if (clp->cl_owner_id != NULL)
a3192688 5357 return 0;
4a3e5779 5358
a3192688 5359 rcu_read_lock();
4a70316c 5360 len = 14 + strlen(clp->cl_ipaddr) + 1 +
a3192688
JL		 5361 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) +
5362 1 +
5363 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO)) +
5364 1;
5365 rcu_read_unlock();
5366
5367 if (len > NFS4_OPAQUE_LIMIT + 1)
5368 return -EINVAL;
5369
5370 /*
5371 * Since this string is allocated at mount time, and held until the
5372 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5373 * about a memory-reclaim deadlock.
5374 */
5375 str = kmalloc(len, GFP_KERNEL);
5376 if (!str)
5377 return -ENOMEM;
ceb3a16c 5378
e984a55a 5379 rcu_read_lock();
f2dd436e 5380 scnprintf(str, len, "Linux NFSv4.0 %s/%s %s",
a3192688
JL		 5381 clp->cl_ipaddr,
5382 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR),
5383 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO));
e984a55a 5384 rcu_read_unlock();
a3192688 5385
a3192688
JL		 5386 clp->cl_owner_id = str;
5387 return 0;
e984a55a
CL		 5388}
5389
873e3851
JL		 5390static int
5391nfs4_init_uniquifier_client_string(struct nfs_client *clp)
5392{
873e3851
JL		 5393 size_t len;
5394 char *str;
5395
5396 len = 10 + 10 + 1 + 10 + 1 +
5397 strlen(nfs4_client_id_uniquifier) + 1 +
5398 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5399
5400 if (len > NFS4_OPAQUE_LIMIT + 1)
5401 return -EINVAL;
5402
5403 /*
5404 * Since this string is allocated at mount time, and held until the
5405 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5406 * about a memory-reclaim deadlock.
5407 */
5408 str = kmalloc(len, GFP_KERNEL);
5409 if (!str)
5410 return -ENOMEM;
5411
f2dd436e 5412 scnprintf(str, len, "Linux NFSv%u.%u %s/%s",
873e3851
JL		 5413 clp->rpc_ops->version, clp->cl_minorversion,
5414 nfs4_client_id_uniquifier,
5415 clp->cl_rpcclient->cl_nodename);
873e3851
JL		 5416 clp->cl_owner_id = str;
5417 return 0;
5418}
5419
5420static int
5421nfs4_init_uniform_client_string(struct nfs_client *clp)
e984a55a 5422{
873e3851
JL		 5423 size_t len;
5424 char *str;
ceb3a16c
TM		 5425
5426 if (clp->cl_owner_id != NULL)
873e3851 5427 return 0;
6f2ea7f2
CL		 5428
5429 if (nfs4_client_id_uniquifier[0] != '\0')
873e3851
JL		 5430 return nfs4_init_uniquifier_client_string(clp);
5431
5432 len = 10 + 10 + 1 + 10 + 1 +
5433 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5434
5435 if (len > NFS4_OPAQUE_LIMIT + 1)
5436 return -EINVAL;
5437
5438 /*
5439 * Since this string is allocated at mount time, and held until the
5440 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5441 * about a memory-reclaim deadlock.
5442 */
5443 str = kmalloc(len, GFP_KERNEL);
5444 if (!str)
5445 return -ENOMEM;
5446
f2dd436e 5447 scnprintf(str, len, "Linux NFSv%u.%u %s",
873e3851
JL		 5448 clp->rpc_ops->version, clp->cl_minorversion,
5449 clp->cl_rpcclient->cl_nodename);
873e3851
JL		 5450 clp->cl_owner_id = str;
5451 return 0;
e984a55a
CL		 5452}
5453
706cb8db
CL		 5454/*
5455 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
5456 * services. Advertise one based on the address family of the
5457 * clientaddr.
5458 */
5459static unsigned int
5460nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
5461{
5462 if (strchr(clp->cl_ipaddr, ':') != NULL)
5463 return scnprintf(buf, len, "tcp6");
5464 else
5465 return scnprintf(buf, len, "tcp");
5466}
5467
f11b2a1c
JL		 5468static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
5469{
5470 struct nfs4_setclientid *sc = calldata;
5471
5472 if (task->tk_status == 0)
5473 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
5474}
5475
5476static const struct rpc_call_ops nfs4_setclientid_ops = {
5477 .rpc_call_done = nfs4_setclientid_done,
5478};
5479
6bbb4ae8
CL		 5480/**
5481 * nfs4_proc_setclientid - Negotiate client ID
5482 * @clp: state data structure
5483 * @program: RPC program for NFSv4 callback service
5484 * @port: IP port number for NFS4 callback service
5485 * @cred: RPC credential to use for this call
5486 * @res: where to place the result
5487 *
5488 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5489 */
bb8b27e5
TM		 5490int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
5491 unsigned short port, struct rpc_cred *cred,
5492 struct nfs4_setclientid_res *res)
1da177e4
LT		 5493{
5494 nfs4_verifier sc_verifier;
5495 struct nfs4_setclientid setclientid = {
5496 .sc_verifier = &sc_verifier,
5497 .sc_prog = program,
3a6bb738 5498 .sc_clnt = clp,
1da177e4
LT		 5499 };
5500 struct rpc_message msg = {
5501 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
5502 .rpc_argp = &setclientid,
bb8b27e5 5503 .rpc_resp = res,
286d7d6a 5504 .rpc_cred = cred,
1da177e4 5505 };
f11b2a1c
JL		 5506 struct rpc_task *task;
5507 struct rpc_task_setup task_setup_data = {
5508 .rpc_client = clp->cl_rpcclient,
5509 .rpc_message = &msg,
5510 .callback_ops = &nfs4_setclientid_ops,
5511 .callback_data = &setclientid,
5512 .flags = RPC_TASK_TIMEOUT,
5513 };
6bbb4ae8 5514 int status;
1da177e4 5515
de734831 5516 /* nfs_client_id4 */
f092075d 5517 nfs4_init_boot_verifier(clp, &sc_verifier);
873e3851
JL		 5518
5519 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
5520 status = nfs4_init_uniform_client_string(clp);
5521 else
a3192688 5522 status = nfs4_init_nonuniform_client_string(clp);
873e3851
JL		 5523
5524 if (status)
5525 goto out;
3a6bb738 5526
de734831 5527 /* cb_client4 */
706cb8db
CL		 5528 setclientid.sc_netid_len =
5529 nfs4_init_callback_netid(clp,
5530 setclientid.sc_netid,
5531 sizeof(setclientid.sc_netid));
de734831 5532 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 5533 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 5534 clp->cl_ipaddr, port >> 8, port & 255);
5535
3a6bb738 5536 dprintk("NFS call setclientid auth=%s, '%s'\n",
6bbb4ae8 5537 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3a6bb738 5538 clp->cl_owner_id);
f11b2a1c
JL		 5539 task = rpc_run_task(&task_setup_data);
5540 if (IS_ERR(task)) {
5541 status = PTR_ERR(task);
5542 goto out;
5543 }
5544 status = task->tk_status;
5545 if (setclientid.sc_cred) {
5546 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
5547 put_rpccred(setclientid.sc_cred);
5548 }
5549 rpc_put_task(task);
5550out:
c6d01c6f 5551 trace_nfs4_setclientid(clp, status);
6bbb4ae8
CL		 5552 dprintk("NFS reply setclientid: %d\n", status);
5553 return status;
1da177e4
LT		 5554}
5555
6bbb4ae8
CL		 5556/**
5557 * nfs4_proc_setclientid_confirm - Confirm client ID
5558 * @clp: state data structure
5559 * @res: result of a previous SETCLIENTID
5560 * @cred: RPC credential to use for this call
5561 *
5562 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5563 */
fd954ae1 5564int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 5565 struct nfs4_setclientid_res *arg,
5566 struct rpc_cred *cred)
1da177e4 5567{
1da177e4
LT		 5568 struct rpc_message msg = {
5569 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 5570 .rpc_argp = arg,
286d7d6a 5571 .rpc_cred = cred,
1da177e4 5572 };
1da177e4
LT		 5573 int status;
5574
6bbb4ae8
CL		 5575 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
5576 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5577 clp->cl_clientid);
1bd714f2 5578 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 5579 trace_nfs4_setclientid_confirm(clp, status);
6bbb4ae8 5580 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 5581 return status;
5582}
5583
fe650407
TM		 5584struct nfs4_delegreturndata {
5585 struct nfs4_delegreturnargs args;
fa178f29 5586 struct nfs4_delegreturnres res;
fe650407
TM		 5587 struct nfs_fh fh;
5588 nfs4_stateid stateid;
26e976a8 5589 unsigned long timestamp;
586f1c39
TM		 5590 struct {
5591 struct nfs4_layoutreturn_args arg;
5592 struct nfs4_layoutreturn_res res;
4d796d75 5593 struct nfs4_xdr_opaque_data ld_private;
586f1c39
TM		 5594 u32 roc_barrier;
5595 bool roc;
5596 } lr;
fa178f29 5597 struct nfs_fattr fattr;
fe650407 5598 int rpc_status;
039b756a 5599 struct inode *inode;
fe650407
TM		 5600};
5601
fe650407
TM		 5602static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
5603{
5604 struct nfs4_delegreturndata *data = calldata;
938e1010 5605
14516c3a
TM		 5606 if (!nfs4_sequence_done(task, &data->res.seq_res))
5607 return;
938e1010 5608
ca8acf8d 5609 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
586f1c39
TM		 5610
5611 /* Handle Layoutreturn errors */
5612 if (data->args.lr_args && task->tk_status != 0) {
5613 switch(data->res.lr_ret) {
5614 default:
5615 data->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
5616 break;
5617 case 0:
5618 data->args.lr_args = NULL;
5619 data->res.lr_res = NULL;
5620 break;
5621 case -NFS4ERR_ADMIN_REVOKED:
5622 case -NFS4ERR_DELEG_REVOKED:
5623 case -NFS4ERR_EXPIRED:
5624 case -NFS4ERR_BAD_STATEID:
5625 case -NFS4ERR_OLD_STATEID:
5626 case -NFS4ERR_UNKNOWN_LAYOUTTYPE:
5627 case -NFS4ERR_WRONG_CRED:
5628 data->args.lr_args = NULL;
5629 data->res.lr_res = NULL;
5630 data->res.lr_ret = 0;
5631 rpc_restart_call_prepare(task);
5632 return;
5633 }
5634 }
5635
79708861 5636 switch (task->tk_status) {
79708861 5637 case 0:
fa178f29 5638 renew_lease(data->res.server, data->timestamp);
23ea44c2 5639 break;
c97cf606
TM		 5640 case -NFS4ERR_ADMIN_REVOKED:
5641 case -NFS4ERR_DELEG_REVOKED:
26d36301
TM		 5642 case -NFS4ERR_EXPIRED:
5643 nfs4_free_revoked_stateid(data->res.server,
5644 data->args.stateid,
5645 task->tk_msg.rpc_cred);
c97cf606
TM		 5646 case -NFS4ERR_BAD_STATEID:
5647 case -NFS4ERR_OLD_STATEID:
5648 case -NFS4ERR_STALE_STATEID:
c97cf606
TM		 5649 task->tk_status = 0;
5650 break;
8ac2b422
TM		 5651 case -NFS4ERR_ACCESS:
5652 if (data->args.bitmask) {
5653 data->args.bitmask = NULL;
5654 data->res.fattr = NULL;
5655 task->tk_status = 0;
5656 rpc_restart_call_prepare(task);
5657 return;
5658 }
79708861 5659 default:
8478eaa1
N		 5660 if (nfs4_async_handle_error(task, data->res.server,
5661 NULL, NULL) == -EAGAIN) {
d00c5d43 5662 rpc_restart_call_prepare(task);
79708861
RL		 5663 return;
5664 }
5665 }
5666 data->rpc_status = task->tk_status;
fe650407
TM		 5667}
5668
5669static void nfs4_delegreturn_release(void *calldata)
5670{
039b756a 5671 struct nfs4_delegreturndata *data = calldata;
ea7c38fe 5672 struct inode *inode = data->inode;
039b756a 5673
ea7c38fe 5674 if (inode) {
586f1c39 5675 if (data->lr.roc)
1c5bd76d
TM		 5676 pnfs_roc_release(&data->lr.arg, &data->lr.res,
5677 data->res.lr_ret);
0bc2c9b4 5678 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
ea7c38fe
TM		 5679 nfs_iput_and_deactive(inode);
5680 }
fe650407
TM		 5681 kfree(calldata);
5682}
5683
938e1010
AA		 5684static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5685{
5686 struct nfs4_delegreturndata *d_data;
5687
5688 d_data = (struct nfs4_delegreturndata *)data;
5689
1c5bd76d 5690 if (!d_data->lr.roc && nfs4_wait_on_layoutreturn(d_data->inode, task))
500d701f
PT		 5691 return;
5692
42e1cca7 5693 nfs4_setup_sequence(d_data->res.server->nfs_client,
d9afbd1b
TM		 5694 &d_data->args.seq_args,
5695 &d_data->res.seq_res,
5696 task);
938e1010 5697}
938e1010 5698
c8d149f3 5699static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010 5700 .rpc_call_prepare = nfs4_delegreturn_prepare,
fe650407
TM		 5701 .rpc_call_done = nfs4_delegreturn_done,
5702 .rpc_release = nfs4_delegreturn_release,
5703};
5704
e6f81075 5705static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 5706{
5707 struct nfs4_delegreturndata *data;
fa178f29 5708 struct nfs_server *server = NFS_SERVER(inode);
fe650407 5709 struct rpc_task *task;
5138fde0
TM		 5710 struct rpc_message msg = {
5711 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5712 .rpc_cred = cred,
5713 };
c970aa85
TM		 5714 struct rpc_task_setup task_setup_data = {
5715 .rpc_client = server->client,
5138fde0 5716 .rpc_message = &msg,
c970aa85
TM		 5717 .callback_ops = &nfs4_delegreturn_ops,
5718 .flags = RPC_TASK_ASYNC,
5719 };
e6f81075 5720 int status = 0;
fe650407 5721
8535b2be 5722 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 5723 if (data == NULL)
5724 return -ENOMEM;
a9c92d6b 5725 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
99ade3c7
AE		 5726
5727 nfs4_state_protect(server->nfs_client,
5728 NFS_SP4_MACH_CRED_CLEANUP,
5729 &task_setup_data.rpc_client, &msg);
5730
fe650407
TM		 5731 data->args.fhandle = &data->fh;
5732 data->args.stateid = &data->stateid;
9e907fec 5733 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 5734 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 5735 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 5736 data->res.fattr = &data->fattr;
5737 data->res.server = server;
586f1c39 5738 data->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
4d796d75 5739 data->lr.arg.ld_private = &data->lr.ld_private;
5138fde0 5740 nfs_fattr_init(data->res.fattr);
26e976a8 5741 data->timestamp = jiffies;
fe650407 5742 data->rpc_status = 0;
53e6fc86 5743 data->lr.roc = pnfs_roc(inode, &data->lr.arg, &data->lr.res, cred);
ea7c38fe 5744 data->inode = nfs_igrab_and_active(inode);
1c5bd76d 5745 if (data->inode) {
1c5bd76d
TM		 5746 if (data->lr.roc) {
5747 data->args.lr_args = &data->lr.arg;
5748 data->res.lr_res = &data->lr.res;
5749 }
53e6fc86
TM		 5750 } else if (data->lr.roc) {
5751 pnfs_roc_release(&data->lr.arg, &data->lr.res, 0);
5752 data->lr.roc = false;
1c5bd76d 5753 }
fe650407 5754
c970aa85 5755 task_setup_data.callback_data = data;
1174dd1f
TM		 5756 msg.rpc_argp = &data->args;
5757 msg.rpc_resp = &data->res;
c970aa85 5758 task = rpc_run_task(&task_setup_data);
7a1218a2 5759 if (IS_ERR(task))
fe650407 5760 return PTR_ERR(task);
e6f81075
TM		 5761 if (!issync)
5762 goto out;
820bf85c 5763 status = rpc_wait_for_completion_task(task);
e6f81075
TM		 5764 if (status != 0)
5765 goto out;
5766 status = data->rpc_status;
e6f81075 5767out:
e6b3c4db 5768 rpc_put_task(task);
fe650407 5769 return status;
1da177e4
LT		 5770}
5771
e6f81075 5772int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 5773{
5774 struct nfs_server *server = NFS_SERVER(inode);
5775 struct nfs4_exception exception = { };
5776 int err;
5777 do {
e6f81075 5778 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
48c9579a 5779 trace_nfs4_delegreturn(inode, stateid, err);
1da177e4
LT		 5780 switch (err) {
5781 case -NFS4ERR_STALE_STATEID:
5782 case -NFS4ERR_EXPIRED:
1da177e4
LT		 5783 case 0:
5784 return 0;
5785 }
5786 err = nfs4_handle_exception(server, err, &exception);
5787 } while (exception.retry);
5788 return err;
5789}
5790
1da177e4
LT		 5791static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5792{
5793 struct inode *inode = state->inode;
5794 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 5795 struct nfs_client *clp = server->nfs_client;
911d1aaf 5796 struct nfs_lockt_args arg = {
1da177e4 5797 .fh = NFS_FH(inode),
911d1aaf 5798 .fl = request,
1da177e4 5799 };
911d1aaf
TM		 5800 struct nfs_lockt_res res = {
5801 .denied = request,
1da177e4
LT		 5802 };
5803 struct rpc_message msg = {
5804 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
d9b67e1e
AS		 5805 .rpc_argp = &arg,
5806 .rpc_resp = &res,
1da177e4
LT		 5807 .rpc_cred = state->owner->so_cred,
5808 };
1da177e4
LT		 5809 struct nfs4_lock_state *lsp;
5810 int status;
5811
911d1aaf 5812 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 5813 status = nfs4_set_lock_state(state, request);
5814 if (status != 0)
5815 goto out;
5816 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 5817 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5818 arg.lock_owner.s_dev = server->s_dev;
7c513058 5819 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 5820 switch (status) {
5821 case 0:
5822 request->fl_type = F_UNLCK;
5823 break;
5824 case -NFS4ERR_DENIED:
5825 status = 0;
1da177e4 5826 }
70cc6487 5827 request->fl_ops->fl_release_private(request);
a6f951dd 5828 request->fl_ops = NULL;
8d0a8a9d 5829out:
1da177e4
LT		 5830 return status;
5831}
5832
5833static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5834{
5835 struct nfs4_exception exception = { };
5836 int err;
5837
5838 do {
d1b748a5
TM		 5839 err = _nfs4_proc_getlk(state, cmd, request);
5840 trace_nfs4_get_lock(request, state, cmd, err);
5841 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
1da177e4
LT		 5842 &exception);
5843 } while (exception.retry);
5844 return err;
5845}
5846
faf5f49c 5847struct nfs4_unlockdata {
911d1aaf
TM		 5848 struct nfs_locku_args arg;
5849 struct nfs_locku_res res;
faf5f49c
TM		 5850 struct nfs4_lock_state *lsp;
5851 struct nfs_open_context *ctx;
f30cb757 5852 struct nfs_lock_context *l_ctx;
911d1aaf 5853 struct file_lock fl;
516285eb 5854 struct nfs_server *server;
26e976a8 5855 unsigned long timestamp;
faf5f49c
TM		 5856};
5857
911d1aaf
TM		 5858static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5859 struct nfs_open_context *ctx,
5860 struct nfs4_lock_state *lsp,
5861 struct nfs_seqid *seqid)
5862{
5863 struct nfs4_unlockdata *p;
5864 struct inode *inode = lsp->ls_state->inode;
5865
8535b2be 5866 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 5867 if (p == NULL)
5868 return NULL;
5869 p->arg.fh = NFS_FH(inode);
5870 p->arg.fl = &p->fl;
5871 p->arg.seqid = seqid;
c1d51931 5872 p->res.seqid = seqid;
911d1aaf
TM		 5873 p->lsp = lsp;
5874 atomic_inc(&lsp->ls_count);
5875 /* Ensure we don't close file until we're done freeing locks! */
5876 p->ctx = get_nfs_open_context(ctx);
f30cb757 5877 p->l_ctx = nfs_get_lock_context(ctx);
911d1aaf
TM		 5878 memcpy(&p->fl, fl, sizeof(p->fl));
5879 p->server = NFS_SERVER(inode);
5880 return p;
5881}
5882
06f814a3 5883static void nfs4_locku_release_calldata(void *data)
faf5f49c 5884{
963d8fe5 5885 struct nfs4_unlockdata *calldata = data;
911d1aaf 5886 nfs_free_seqid(calldata->arg.seqid);
06f814a3 5887 nfs4_put_lock_state(calldata->lsp);
f30cb757 5888 nfs_put_lock_context(calldata->l_ctx);
06f814a3
TM		 5889 put_nfs_open_context(calldata->ctx);
5890 kfree(calldata);
faf5f49c
TM		 5891}
5892
963d8fe5 5893static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 5894{
963d8fe5 5895 struct nfs4_unlockdata *calldata = data;
faf5f49c 5896
14516c3a
TM		 5897 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5898 return;
faf5f49c
TM		 5899 switch (task->tk_status) {
5900 case 0:
26e976a8 5901 renew_lease(calldata->server, calldata->timestamp);
75575ddf 5902 locks_lock_inode_wait(calldata->lsp->ls_state->inode, &calldata->fl);
c69899a1
TM		 5903 if (nfs4_update_lock_stateid(calldata->lsp,
5904 &calldata->res.stateid))
5905 break;
26d36301
TM		 5906 case -NFS4ERR_ADMIN_REVOKED:
5907 case -NFS4ERR_EXPIRED:
5908 nfs4_free_revoked_stateid(calldata->server,
5909 &calldata->arg.stateid,
5910 task->tk_msg.rpc_cred);
9e33bed5
TM		 5911 case -NFS4ERR_BAD_STATEID:
5912 case -NFS4ERR_OLD_STATEID:
faf5f49c 5913 case -NFS4ERR_STALE_STATEID:
425c1d4e
TM		 5914 if (!nfs4_stateid_match(&calldata->arg.stateid,
5915 &calldata->lsp->ls_stateid))
5916 rpc_restart_call_prepare(task);
faf5f49c
TM		 5917 break;
5918 default:
8478eaa1
N		 5919 if (nfs4_async_handle_error(task, calldata->server,
5920 NULL, NULL) == -EAGAIN)
d00c5d43 5921 rpc_restart_call_prepare(task);
faf5f49c 5922 }
2b1bc308 5923 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 5924}
5925
4ce70ada 5926static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 5927{
4ce70ada 5928 struct nfs4_unlockdata *calldata = data;
faf5f49c 5929
f30cb757
BC		 5930 if (test_bit(NFS_CONTEXT_UNLOCK, &calldata->l_ctx->open_context->flags) &&
5931 nfs_async_iocounter_wait(task, calldata->l_ctx))
5932 return;
5933
911d1aaf 5934 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 5935 goto out_wait;
425c1d4e 5936 nfs4_stateid_copy(&calldata->arg.stateid, &calldata->lsp->ls_stateid);
795a88c9 5937 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 5938 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 5939 goto out_no_action;
faf5f49c 5940 }
26e976a8 5941 calldata->timestamp = jiffies;
42e1cca7 5942 if (nfs4_setup_sequence(calldata->server->nfs_client,
a893693c 5943 &calldata->arg.seq_args,
2240a9e2
TM		 5944 &calldata->res.seq_res,
5945 task) != 0)
5946 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 5947 return;
5948out_no_action:
5949 task->tk_action = NULL;
5950out_wait:
5951 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 5952}
5953
963d8fe5 5954static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 5955 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 5956 .rpc_call_done = nfs4_locku_done,
06f814a3 5957 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 5958};
5959
a5d16a4d
TM		 5960static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5961 struct nfs_open_context *ctx,
5962 struct nfs4_lock_state *lsp,
5963 struct nfs_seqid *seqid)
5964{
5965 struct nfs4_unlockdata *data;
5138fde0
TM		 5966 struct rpc_message msg = {
5967 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5968 .rpc_cred = ctx->cred,
5969 };
c970aa85
TM		 5970 struct rpc_task_setup task_setup_data = {
5971 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 5972 .rpc_message = &msg,
c970aa85 5973 .callback_ops = &nfs4_locku_ops,
101070ca 5974 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5975 .flags = RPC_TASK_ASYNC,
5976 };
a5d16a4d 5977
fa940720
WAA		 5978 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5979 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5980
137d6aca
FF		 5981 /* Ensure this is an unlock - when canceling a lock, the
5982 * canceled lock is passed in, and it won't be an unlock.
5983 */
5984 fl->fl_type = F_UNLCK;
f30cb757
BC		 5985 if (fl->fl_flags & FL_CLOSE)
5986 set_bit(NFS_CONTEXT_UNLOCK, &ctx->flags);
137d6aca 5987
a5d16a4d
TM		 5988 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5989 if (data == NULL) {
5990 nfs_free_seqid(seqid);
5991 return ERR_PTR(-ENOMEM);
5992 }
5993
a9c92d6b 5994 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5995 msg.rpc_argp = &data->arg;
5996 msg.rpc_resp = &data->res;
c970aa85
TM		 5997 task_setup_data.callback_data = data;
5998 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 5999}
6000
faf5f49c
TM		 6001static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
6002{
65b62a29
TM		 6003 struct inode *inode = state->inode;
6004 struct nfs4_state_owner *sp = state->owner;
6005 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 6006 struct nfs_seqid *seqid;
1da177e4 6007 struct nfs4_lock_state *lsp;
06f814a3 6008 struct rpc_task *task;
b4019c0e 6009 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
06f814a3 6010 int status = 0;
536ff0f8 6011 unsigned char fl_flags = request->fl_flags;
faf5f49c 6012
8d0a8a9d 6013 status = nfs4_set_lock_state(state, request);
9b073574
TM		 6014 /* Unlock _before_ we do the RPC call */
6015 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 6016 /* Exclude nfs_delegation_claim_locks() */
6017 mutex_lock(&sp->so_delegreturn_mutex);
6018 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57 6019 down_read(&nfsi->rwsem);
75575ddf 6020 if (locks_lock_inode_wait(inode, request) == -ENOENT) {
19e03c57 6021 up_read(&nfsi->rwsem);
65b62a29 6022 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 6023 goto out;
19e03c57
TM		 6024 }
6025 up_read(&nfsi->rwsem);
65b62a29 6026 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 6027 if (status != 0)
9b073574
TM		 6028 goto out;
6029 /* Is this a delegated lock? */
8d0a8a9d 6030 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 6031 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
6032 goto out;
b4019c0e
TM		 6033 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid;
6034 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 6035 status = -ENOMEM;
badc76dd 6036 if (IS_ERR(seqid))
9b073574 6037 goto out;
cd3758e3 6038 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 6039 status = PTR_ERR(task);
6040 if (IS_ERR(task))
9b073574 6041 goto out;
820bf85c 6042 status = rpc_wait_for_completion_task(task);
e6b3c4db 6043 rpc_put_task(task);
9b073574 6044out:
536ff0f8 6045 request->fl_flags = fl_flags;
d1b748a5 6046 trace_nfs4_unlock(request, state, F_SETLK, status);
1da177e4
LT		 6047 return status;
6048}
6049
a5d16a4d
TM		 6050struct nfs4_lockdata {
6051 struct nfs_lock_args arg;
6052 struct nfs_lock_res res;
6053 struct nfs4_lock_state *lsp;
6054 struct nfs_open_context *ctx;
6055 struct file_lock fl;
26e976a8 6056 unsigned long timestamp;
a5d16a4d
TM		 6057 int rpc_status;
6058 int cancelled;
66179efe 6059 struct nfs_server *server;
a5d16a4d
TM		 6060};
6061
6062static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 6063 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
6064 gfp_t gfp_mask)
1da177e4 6065{
a5d16a4d
TM		 6066 struct nfs4_lockdata *p;
6067 struct inode *inode = lsp->ls_state->inode;
1da177e4 6068 struct nfs_server *server = NFS_SERVER(inode);
b4019c0e 6069 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
a5d16a4d 6070
8535b2be 6071 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 6072 if (p == NULL)
6073 return NULL;
6074
6075 p->arg.fh = NFS_FH(inode);
6076 p->arg.fl = &p->fl;
8535b2be 6077 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
badc76dd 6078 if (IS_ERR(p->arg.open_seqid))
2f74c0a0 6079 goto out_free;
b4019c0e
TM		 6080 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
6081 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask);
badc76dd 6082 if (IS_ERR(p->arg.lock_seqid))
2f74c0a0 6083 goto out_free_seqid;
7539bbab 6084 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 6085 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 6086 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 6087 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 6088 p->lsp = lsp;
66179efe 6089 p->server = server;
a5d16a4d
TM		 6090 atomic_inc(&lsp->ls_count);
6091 p->ctx = get_nfs_open_context(ctx);
6092 memcpy(&p->fl, fl, sizeof(p->fl));
6093 return p;
2f74c0a0
TM		 6094out_free_seqid:
6095 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 6096out_free:
6097 kfree(p);
6098 return NULL;
6099}
6100
6101static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
6102{
6103 struct nfs4_lockdata *data = calldata;
6104 struct nfs4_state *state = data->lsp->ls_state;
06735b34 6105
3110ff80 6106 dprintk("%s: begin!\n", __func__);
2f74c0a0 6107 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 6108 goto out_wait;
a5d16a4d 6109 /* Do we need to do an open_to_lock_owner? */
6b447539 6110 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) {
8fe72bac 6111 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 6112 goto out_release_lock_seqid;
8fe72bac 6113 }
425c1d4e
TM		 6114 nfs4_stateid_copy(&data->arg.open_stateid,
6115 &state->open_stateid);
a5d16a4d 6116 data->arg.new_lock_owner = 1;
c1d51931 6117 data->res.open_seqid = data->arg.open_seqid;
425c1d4e 6118 } else {
2f74c0a0 6119 data->arg.new_lock_owner = 0;
425c1d4e
TM		 6120 nfs4_stateid_copy(&data->arg.lock_stateid,
6121 &data->lsp->ls_stateid);
6122 }
5d422301
TM		 6123 if (!nfs4_valid_open_stateid(state)) {
6124 data->rpc_status = -EBADF;
6125 task->tk_action = NULL;
6126 goto out_release_open_seqid;
6127 }
26e976a8 6128 data->timestamp = jiffies;
42e1cca7 6129 if (nfs4_setup_sequence(data->server->nfs_client,
035168ab 6130 &data->arg.seq_args,
2240a9e2 6131 &data->res.seq_res,
d9afbd1b 6132 task) == 0)
66179efe 6133 return;
5d422301 6134out_release_open_seqid:
2240a9e2
TM		 6135 nfs_release_seqid(data->arg.open_seqid);
6136out_release_lock_seqid:
6137 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 6138out_wait:
6139 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 6140 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 6141}
6142
a5d16a4d
TM		 6143static void nfs4_lock_done(struct rpc_task *task, void *calldata)
6144{
6145 struct nfs4_lockdata *data = calldata;
39071e6f 6146 struct nfs4_lock_state *lsp = data->lsp;
a5d16a4d 6147
3110ff80 6148 dprintk("%s: begin!\n", __func__);
a5d16a4d 6149
14516c3a
TM		 6150 if (!nfs4_sequence_done(task, &data->res.seq_res))
6151 return;
66179efe 6152
a5d16a4d 6153 data->rpc_status = task->tk_status;
425c1d4e
TM		 6154 switch (task->tk_status) {
6155 case 0:
2b0143b5 6156 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)),
39071e6f 6157 data->timestamp);
c69899a1
TM		 6158 if (data->arg.new_lock) {
6159 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS);
75575ddf 6160 if (locks_lock_inode_wait(lsp->ls_state->inode, &data->fl) < 0) {
c69899a1
TM		 6161 rpc_restart_call_prepare(task);
6162 break;
6163 }
6164 }
39071e6f
TM		 6165 if (data->arg.new_lock_owner != 0) {
6166 nfs_confirm_seqid(&lsp->ls_seqid, 0);
6167 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid);
6168 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
6169 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid))
6170 rpc_restart_call_prepare(task);
425c1d4e
TM		 6171 break;
6172 case -NFS4ERR_BAD_STATEID:
6173 case -NFS4ERR_OLD_STATEID:
6174 case -NFS4ERR_STALE_STATEID:
6175 case -NFS4ERR_EXPIRED:
6176 if (data->arg.new_lock_owner != 0) {
6177 if (!nfs4_stateid_match(&data->arg.open_stateid,
6178 &lsp->ls_state->open_stateid))
6179 rpc_restart_call_prepare(task);
6180 } else if (!nfs4_stateid_match(&data->arg.lock_stateid,
6181 &lsp->ls_stateid))
6182 rpc_restart_call_prepare(task);
a5d16a4d 6183 }
3110ff80 6184 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 6185}
6186
6187static void nfs4_lock_release(void *calldata)
6188{
6189 struct nfs4_lockdata *data = calldata;
6190
3110ff80 6191 dprintk("%s: begin!\n", __func__);
2f74c0a0 6192 nfs_free_seqid(data->arg.open_seqid);
a7a3b1e9 6193 if (data->cancelled) {
a5d16a4d
TM		 6194 struct rpc_task *task;
6195 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
6196 data->arg.lock_seqid);
6197 if (!IS_ERR(task))
bf294b41 6198 rpc_put_task_async(task);
3110ff80 6199 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 6200 } else
6201 nfs_free_seqid(data->arg.lock_seqid);
6202 nfs4_put_lock_state(data->lsp);
6203 put_nfs_open_context(data->ctx);
6204 kfree(data);
3110ff80 6205 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 6206}
6207
6208static const struct rpc_call_ops nfs4_lock_ops = {
6209 .rpc_call_prepare = nfs4_lock_prepare,
6210 .rpc_call_done = nfs4_lock_done,
6211 .rpc_release = nfs4_lock_release,
6212};
6213
2bee72a6
TM		 6214static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
6215{
2bee72a6
TM		 6216 switch (error) {
6217 case -NFS4ERR_ADMIN_REVOKED:
d7f3e4bf 6218 case -NFS4ERR_EXPIRED:
2bee72a6 6219 case -NFS4ERR_BAD_STATEID:
ecac799a 6220 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 6221 if (new_lock_owner != 0 ||
795a88c9 6222 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 6223 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 6224 break;
6225 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 6226 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a 6227 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 6228 };
6229}
6230
afe6c27c 6231static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 6232{
6233 struct nfs4_lockdata *data;
6234 struct rpc_task *task;
5138fde0
TM		 6235 struct rpc_message msg = {
6236 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
6237 .rpc_cred = state->owner->so_cred,
6238 };
c970aa85
TM		 6239 struct rpc_task_setup task_setup_data = {
6240 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 6241 .rpc_message = &msg,
c970aa85 6242 .callback_ops = &nfs4_lock_ops,
101070ca 6243 .workqueue = nfsiod_workqueue,
c970aa85
TM		 6244 .flags = RPC_TASK_ASYNC,
6245 };
a5d16a4d
TM		 6246 int ret;
6247
3110ff80 6248 dprintk("%s: begin!\n", __func__);
cd3758e3 6249 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 6250 fl->fl_u.nfs4_fl.owner,
6251 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 6252 if (data == NULL)
6253 return -ENOMEM;
6254 if (IS_SETLKW(cmd))
6255 data->arg.block = 1;
a9c92d6b 6256 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 6257 msg.rpc_argp = &data->arg;
6258 msg.rpc_resp = &data->res;
c970aa85 6259 task_setup_data.callback_data = data;
8fe72bac
TM		 6260 if (recovery_type > NFS_LOCK_NEW) {
6261 if (recovery_type == NFS_LOCK_RECLAIM)
6262 data->arg.reclaim = NFS_LOCK_RECLAIM;
6263 nfs4_set_sequence_privileged(&data->arg.seq_args);
c69899a1
TM		 6264 } else
6265 data->arg.new_lock = 1;
c970aa85 6266 task = rpc_run_task(&task_setup_data);
7a1218a2 6267 if (IS_ERR(task))
a5d16a4d 6268 return PTR_ERR(task);
820bf85c 6269 ret = rpc_wait_for_completion_task(task);
a5d16a4d
TM		 6270 if (ret == 0) {
6271 ret = data->rpc_status;
2bee72a6
TM		 6272 if (ret)
6273 nfs4_handle_setlk_error(data->server, data->lsp,
6274 data->arg.new_lock_owner, ret);
a5d16a4d 6275 } else
a7a3b1e9 6276 data->cancelled = true;
e6b3c4db 6277 rpc_put_task(task);
3110ff80 6278 dprintk("%s: done, ret = %d!\n", __func__, ret);
48c9579a 6279 trace_nfs4_set_lock(fl, state, &data->res.stateid, cmd, ret);
a5d16a4d 6280 return ret;
1da177e4
LT		 6281}
6282
6283static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
6284{
202b50dc 6285 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 6286 struct nfs4_exception exception = {
6287 .inode = state->inode,
6288 };
202b50dc
TM		 6289 int err;
6290
6291 do {
42a2d13e
TM		 6292 /* Cache the lock if possible... */
6293 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
6294 return 0;
afe6c27c 6295 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 6296 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 6297 break;
6298 nfs4_handle_exception(server, err, &exception);
6299 } while (exception.retry);
6300 return err;
1da177e4
LT		 6301}
6302
6303static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
6304{
202b50dc 6305 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 6306 struct nfs4_exception exception = {
6307 .inode = state->inode,
6308 };
202b50dc
TM		 6309 int err;
6310
6bfc93ef
TM		 6311 err = nfs4_set_lock_state(state, request);
6312 if (err != 0)
6313 return err;
f6de7a39 6314 if (!recover_lost_locks) {
ef1820f9
N		 6315 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
6316 return 0;
6317 }
202b50dc 6318 do {
42a2d13e
TM		 6319 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
6320 return 0;
afe6c27c 6321 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 6322 switch (err) {
6323 default:
6324 goto out;
6325 case -NFS4ERR_GRACE:
6326 case -NFS4ERR_DELAY:
6327 nfs4_handle_exception(server, err, &exception);
6328 err = 0;
6329 }
202b50dc 6330 } while (exception.retry);
a9ed2e25 6331out:
202b50dc 6332 return err;
1da177e4
LT		 6333}
6334
f062eb6c 6335#if defined(CONFIG_NFS_V4_1)
b01dd1d8
BS		 6336static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
6337{
c5896fc8
TM		 6338 struct nfs4_lock_state *lsp;
6339 int status;
b01dd1d8 6340
c5896fc8
TM		 6341 status = nfs4_set_lock_state(state, request);
6342 if (status != 0)
6343 return status;
6344 lsp = request->fl_u.nfs4_fl.owner;
6345 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) ||
6346 test_bit(NFS_LOCK_LOST, &lsp->ls_flags))
6347 return 0;
81b68de4 6348 return nfs4_lock_expired(state, request);
f062eb6c
BS		 6349}
6350#endif
6351
1da177e4
LT		 6352static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6353{
19e03c57 6354 struct nfs_inode *nfsi = NFS_I(state->inode);
11476e9d 6355 struct nfs4_state_owner *sp = state->owner;
01c3b861 6356 unsigned char fl_flags = request->fl_flags;
1ea67dbd 6357 int status;
1da177e4 6358
01c3b861 6359 request->fl_flags |= FL_ACCESS;
75575ddf 6360 status = locks_lock_inode_wait(state->inode, request);
01c3b861
TM		 6361 if (status < 0)
6362 goto out;
11476e9d 6363 mutex_lock(&sp->so_delegreturn_mutex);
19e03c57 6364 down_read(&nfsi->rwsem);
01c3b861 6365 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 6366 /* Yes: cache locks! */
01c3b861 6367 /* ...but avoid races with delegation recall... */
19e03c57 6368 request->fl_flags = fl_flags & ~FL_SLEEP;
75575ddf 6369 status = locks_lock_inode_wait(state->inode, request);
c69899a1 6370 up_read(&nfsi->rwsem);
11476e9d 6371 mutex_unlock(&sp->so_delegreturn_mutex);
9a99af49 6372 goto out;
9a99af49 6373 }
19e03c57 6374 up_read(&nfsi->rwsem);
11476e9d 6375 mutex_unlock(&sp->so_delegreturn_mutex);
c69899a1 6376 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
01c3b861
TM		 6377out:
6378 request->fl_flags = fl_flags;
1da177e4
LT		 6379 return status;
6380}
6381
6382static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6383{
a1d0b5ee
TM		 6384 struct nfs4_exception exception = {
6385 .state = state,
05ffe24f 6386 .inode = state->inode,
a1d0b5ee 6387 };
1da177e4
LT		 6388 int err;
6389
6390 do {
965b5d67
TM		 6391 err = _nfs4_proc_setlk(state, cmd, request);
6392 if (err == -NFS4ERR_DENIED)
6393 err = -EAGAIN;
1da177e4 6394 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 6395 err, &exception);
1da177e4
LT		 6396 } while (exception.retry);
6397 return err;
6398}
6399
d2f3a7f9
JL		 6400#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
6401#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
6402
6403static int
a1d617d8
JL		 6404nfs4_retry_setlk_simple(struct nfs4_state *state, int cmd,
6405 struct file_lock *request)
d2f3a7f9
JL		 6406{
6407 int status = -ERESTARTSYS;
6408 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
6409
6410 while(!signalled()) {
6411 status = nfs4_proc_setlk(state, cmd, request);
6412 if ((status != -EAGAIN) || IS_SETLK(cmd))
6413 break;
6414 freezable_schedule_timeout_interruptible(timeout);
6415 timeout *= 2;
6416 timeout = min_t(unsigned long, NFS4_LOCK_MAXTIMEOUT, timeout);
6417 status = -ERESTARTSYS;
6418 }
6419 return status;
6420}
6421
a1d617d8
JL		 6422#ifdef CONFIG_NFS_V4_1
6423struct nfs4_lock_waiter {
6424 struct task_struct *task;
6425 struct inode *inode;
6426 struct nfs_lowner *owner;
6427 bool notified;
6428};
6429
6430static int
ac6424b9 6431nfs4_wake_lock_waiter(wait_queue_entry_t *wait, unsigned int mode, int flags, void *key)
a1d617d8
JL		 6432{
6433 int ret;
6434 struct cb_notify_lock_args *cbnl = key;
6435 struct nfs4_lock_waiter *waiter = wait->private;
6436 struct nfs_lowner *lowner = &cbnl->cbnl_owner,
6437 *wowner = waiter->owner;
6438
6439 /* Only wake if the callback was for the same owner */
6440 if (lowner->clientid != wowner->clientid ||
6441 lowner->id != wowner->id ||
6442 lowner->s_dev != wowner->s_dev)
6443 return 0;
6444
6445 /* Make sure it's for the right inode */
6446 if (nfs_compare_fh(NFS_FH(waiter->inode), &cbnl->cbnl_fh))
6447 return 0;
6448
6449 waiter->notified = true;
6450
6451 /* override "private" so we can use default_wake_function */
6452 wait->private = waiter->task;
6453 ret = autoremove_wake_function(wait, mode, flags, key);
6454 wait->private = waiter;
6455 return ret;
6456}
6457
6458static int
6459nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6460{
6461 int status = -ERESTARTSYS;
6462 unsigned long flags;
6463 struct nfs4_lock_state *lsp = request->fl_u.nfs4_fl.owner;
6464 struct nfs_server *server = NFS_SERVER(state->inode);
6465 struct nfs_client *clp = server->nfs_client;
6466 wait_queue_head_t *q = &clp->cl_lock_waitq;
6467 struct nfs_lowner owner = { .clientid = clp->cl_clientid,
6468 .id = lsp->ls_seqid.owner_id,
6469 .s_dev = server->s_dev };
6470 struct nfs4_lock_waiter waiter = { .task = current,
6471 .inode = state->inode,
6472 .owner = &owner,
6473 .notified = false };
ac6424b9 6474 wait_queue_entry_t wait;
a1d617d8
JL		 6475
6476 /* Don't bother with waitqueue if we don't expect a callback */
6477 if (!test_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags))
6478 return nfs4_retry_setlk_simple(state, cmd, request);
6479
6480 init_wait(&wait);
6481 wait.private = &waiter;
6482 wait.func = nfs4_wake_lock_waiter;
6483 add_wait_queue(q, &wait);
6484
6485 while(!signalled()) {
6486 status = nfs4_proc_setlk(state, cmd, request);
6487 if ((status != -EAGAIN) || IS_SETLK(cmd))
6488 break;
6489
6490 status = -ERESTARTSYS;
6491 spin_lock_irqsave(&q->lock, flags);
6492 if (waiter.notified) {
6493 spin_unlock_irqrestore(&q->lock, flags);
6494 continue;
6495 }
6496 set_current_state(TASK_INTERRUPTIBLE);
6497 spin_unlock_irqrestore(&q->lock, flags);
6498
b7dbcc0e 6499 freezable_schedule_timeout(NFS4_LOCK_MAXTIMEOUT);
a1d617d8
JL		 6500 }
6501
6502 finish_wait(q, &wait);
6503 return status;
6504}
6505#else /* !CONFIG_NFS_V4_1 */
6506static inline int
6507nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6508{
6509 return nfs4_retry_setlk_simple(state, cmd, request);
6510}
6511#endif
6512
1da177e4
LT		 6513static int
6514nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
6515{
6516 struct nfs_open_context *ctx;
6517 struct nfs4_state *state;
1da177e4
LT		 6518 int status;
6519
6520 /* verify open state */
cd3758e3 6521 ctx = nfs_file_open_context(filp);
1da177e4
LT		 6522 state = ctx->state;
6523
d953126a
TM		 6524 if (IS_GETLK(cmd)) {
6525 if (state != NULL)
6526 return nfs4_proc_getlk(state, F_GETLK, request);
6527 return 0;
6528 }
1da177e4
LT		 6529
6530 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
6531 return -EINVAL;
6532
d953126a
TM		 6533 if (request->fl_type == F_UNLCK) {
6534 if (state != NULL)
6535 return nfs4_proc_unlck(state, cmd, request);
6536 return 0;
6537 }
1da177e4 6538
d953126a
TM		 6539 if (state == NULL)
6540 return -ENOLCK;
1ea67dbd
JL		 6541
6542 if ((request->fl_flags & FL_POSIX) &&
6543 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
6544 return -ENOLCK;
6545
1ea67dbd
JL		 6546 status = nfs4_set_lock_state(state, request);
6547 if (status != 0)
6548 return status;
6549
d2f3a7f9 6550 return nfs4_retry_setlk(state, cmd, request);
1da177e4
LT		 6551}
6552
db4f2e63 6553int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 6554{
6555 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 6556 int err;
6557
6558 err = nfs4_set_lock_state(state, fl);
6559 if (err != 0)
db4f2e63 6560 return err;
4a706fa0 6561 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 6562 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 6563}
6b3b5496 6564
cf470c3e
TM		 6565struct nfs_release_lockowner_data {
6566 struct nfs4_lock_state *lsp;
5ae67c4f 6567 struct nfs_server *server;
cf470c3e 6568 struct nfs_release_lockowner_args args;
b7e63a10 6569 struct nfs_release_lockowner_res res;
60ea6812 6570 unsigned long timestamp;
cf470c3e
TM		 6571};
6572
fbd4bfd1
CL		 6573static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
6574{
6575 struct nfs_release_lockowner_data *data = calldata;
5b53dc88 6576 struct nfs_server *server = data->server;
7981c8a6
AS		 6577 nfs4_setup_sequence(server->nfs_client, &data->args.seq_args,
6578 &data->res.seq_res, task);
5b53dc88 6579 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
60ea6812 6580 data->timestamp = jiffies;
fbd4bfd1
CL		 6581}
6582
6583static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
6584{
6585 struct nfs_release_lockowner_data *data = calldata;
60ea6812
CL		 6586 struct nfs_server *server = data->server;
6587
b7e63a10 6588 nfs40_sequence_done(task, &data->res.seq_res);
60ea6812
CL		 6589
6590 switch (task->tk_status) {
6591 case 0:
6592 renew_lease(server, data->timestamp);
6593 break;
6594 case -NFS4ERR_STALE_CLIENTID:
6595 case -NFS4ERR_EXPIRED:
5b53dc88
KM		 6596 nfs4_schedule_lease_recovery(server->nfs_client);
6597 break;
60ea6812
CL		 6598 case -NFS4ERR_LEASE_MOVED:
6599 case -NFS4ERR_DELAY:
8478eaa1
N		 6600 if (nfs4_async_handle_error(task, server,
6601 NULL, NULL) == -EAGAIN)
60ea6812
CL		 6602 rpc_restart_call_prepare(task);
6603 }
fbd4bfd1
CL		 6604}
6605
d3c7b7cc
TM		 6606static void nfs4_release_lockowner_release(void *calldata)
6607{
cf470c3e 6608 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 6609 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 6610 kfree(calldata);
6611}
6612
17280175 6613static const struct rpc_call_ops nfs4_release_lockowner_ops = {
fbd4bfd1
CL		 6614 .rpc_call_prepare = nfs4_release_lockowner_prepare,
6615 .rpc_call_done = nfs4_release_lockowner_done,
d3c7b7cc
TM		 6616 .rpc_release = nfs4_release_lockowner_release,
6617};
6618
f1cdae87
JL		 6619static void
6620nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 6621{
cf470c3e 6622 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 6623 struct rpc_message msg = {
6624 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
6625 };
6626
6627 if (server->nfs_client->cl_mvops->minor_version != 0)
f1cdae87 6628 return;
fbd4bfd1 6629
cf470c3e
TM		 6630 data = kmalloc(sizeof(*data), GFP_NOFS);
6631 if (!data)
f1cdae87 6632 return;
cf470c3e 6633 data->lsp = lsp;
5ae67c4f 6634 data->server = server;
cf470c3e
TM		 6635 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6636 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
6637 data->args.lock_owner.s_dev = server->s_dev;
fbd4bfd1 6638
cf470c3e 6639 msg.rpc_argp = &data->args;
b7e63a10
TM		 6640 msg.rpc_resp = &data->res;
6641 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
cf470c3e 6642 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
d3c7b7cc
TM		 6643}
6644
aa1870af
BF		 6645#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
6646
d9a82a04 6647static int nfs4_xattr_set_nfs4_acl(const struct xattr_handler *handler,
59301226
AV		 6648 struct dentry *unused, struct inode *inode,
6649 const char *key, const void *buf,
6650 size_t buflen, int flags)
6b3b5496 6651{
59301226 6652 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 6653}
6654
d9a82a04 6655static int nfs4_xattr_get_nfs4_acl(const struct xattr_handler *handler,
b296821a
AV		 6656 struct dentry *unused, struct inode *inode,
6657 const char *key, void *buf, size_t buflen)
6b3b5496 6658{
b296821a 6659 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 6660}
6661
764a5c6b 6662static bool nfs4_xattr_list_nfs4_acl(struct dentry *dentry)
6b3b5496 6663{
764a5c6b 6664 return nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry)));
6b3b5496
BF		 6665}
6666
c9bccef6 6667#ifdef CONFIG_NFS_V4_SECURITY_LABEL
c9bccef6 6668
d9a82a04 6669static int nfs4_xattr_set_nfs4_label(const struct xattr_handler *handler,
59301226
AV		 6670 struct dentry *unused, struct inode *inode,
6671 const char *key, const void *buf,
6672 size_t buflen, int flags)
c9bccef6
DQ		 6673{
6674 if (security_ismaclabel(key))
59301226 6675 return nfs4_set_security_label(inode, buf, buflen);
c9bccef6
DQ		 6676
6677 return -EOPNOTSUPP;
6678}
6679
d9a82a04 6680static int nfs4_xattr_get_nfs4_label(const struct xattr_handler *handler,
b296821a
AV		 6681 struct dentry *unused, struct inode *inode,
6682 const char *key, void *buf, size_t buflen)
c9bccef6
DQ		 6683{
6684 if (security_ismaclabel(key))
b296821a 6685 return nfs4_get_security_label(inode, buf, buflen);
c9bccef6
DQ		 6686 return -EOPNOTSUPP;
6687}
6688
c4803c49
AG		 6689static ssize_t
6690nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
c9bccef6 6691{
c4803c49 6692 int len = 0;
c9bccef6 6693
c4803c49
AG		 6694 if (nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) {
6695 len = security_inode_listsecurity(inode, list, list_len);
6696 if (list_len && len > list_len)
6697 return -ERANGE;
c9bccef6
DQ		 6698 }
6699 return len;
6700}
6701
6702static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
6703 .prefix = XATTR_SECURITY_PREFIX,
c9bccef6
DQ		 6704 .get = nfs4_xattr_get_nfs4_label,
6705 .set = nfs4_xattr_set_nfs4_label,
6706};
c9bccef6 6707
c4803c49
AG		 6708#else
6709
6710static ssize_t
6711nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
6712{
6713 return 0;
6714}
6715
6716#endif
c9bccef6 6717
533eb461
AA		 6718/*
6719 * nfs_fhget will use either the mounted_on_fileid or the fileid
6720 */
69aaaae1
TM		 6721static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6722{
533eb461
AA		 6723 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6724 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6725 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 6726 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 6727 return;
6728
6729 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 6730 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 6731 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6732 fattr->nlink = 2;
6733}
6734
f05d147f
BS		 6735static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6736 const struct qstr *name,
6737 struct nfs4_fs_locations *fs_locations,
6738 struct page *page)
683b57b4
TM		 6739{
6740 struct nfs_server *server = NFS_SERVER(dir);
a09df2ca 6741 u32 bitmask[3] = {
361e624f 6742 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 6743 };
6744 struct nfs4_fs_locations_arg args = {
6745 .dir_fh = NFS_FH(dir),
c228fd3a 6746 .name = name,
683b57b4
TM		 6747 .page = page,
6748 .bitmask = bitmask,
6749 };
22958463
BH		 6750 struct nfs4_fs_locations_res res = {
6751 .fs_locations = fs_locations,
6752 };
683b57b4
TM		 6753 struct rpc_message msg = {
6754 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6755 .rpc_argp = &args,
22958463 6756 .rpc_resp = &res,
683b57b4
TM		 6757 };
6758 int status;
6759
3110ff80 6760 dprintk("%s: start\n", __func__);
533eb461
AA		 6761
6762 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6763 * is not supported */
6764 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6765 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6766 else
6767 bitmask[0] |= FATTR4_WORD0_FILEID;
6768
c228fd3a 6769 nfs_fattr_init(&fs_locations->fattr);
683b57b4 6770 fs_locations->server = server;
830b8e33 6771 fs_locations->nlocations = 0;
f05d147f 6772 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 6773 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 6774 return status;
6775}
6776
f05d147f
BS		 6777int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6778 const struct qstr *name,
6779 struct nfs4_fs_locations *fs_locations,
6780 struct page *page)
db0a9593
BS		 6781{
6782 struct nfs4_exception exception = { };
6783 int err;
6784 do {
078ea3df
TM		 6785 err = _nfs4_proc_fs_locations(client, dir, name,
6786 fs_locations, page);
6787 trace_nfs4_get_fs_locations(dir, name, err);
6788 err = nfs4_handle_exception(NFS_SERVER(dir), err,
db0a9593
BS		 6789 &exception);
6790 } while (exception.retry);
6791 return err;
6792}
6793
b03d735b
CL		 6794/*
6795 * This operation also signals the server that this client is
6796 * performing migration recovery. The server can stop returning
6797 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6798 * appended to this compound to identify the client ID which is
6799 * performing recovery.
6800 */
6801static int _nfs40_proc_get_locations(struct inode *inode,
6802 struct nfs4_fs_locations *locations,
6803 struct page *page, struct rpc_cred *cred)
6804{
6805 struct nfs_server *server = NFS_SERVER(inode);
6806 struct rpc_clnt *clnt = server->client;
6807 u32 bitmask[2] = {
6808 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6809 };
6810 struct nfs4_fs_locations_arg args = {
6811 .clientid = server->nfs_client->cl_clientid,
6812 .fh = NFS_FH(inode),
6813 .page = page,
6814 .bitmask = bitmask,
6815 .migration = 1, /* skip LOOKUP */
6816 .renew = 1, /* append RENEW */
6817 };
6818 struct nfs4_fs_locations_res res = {
6819 .fs_locations = locations,
6820 .migration = 1,
6821 .renew = 1,
6822 };
6823 struct rpc_message msg = {
6824 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6825 .rpc_argp = &args,
6826 .rpc_resp = &res,
6827 .rpc_cred = cred,
6828 };
6829 unsigned long now = jiffies;
6830 int status;
6831
6832 nfs_fattr_init(&locations->fattr);
6833 locations->server = server;
6834 locations->nlocations = 0;
6835
6836 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6837 nfs4_set_sequence_privileged(&args.seq_args);
6838 status = nfs4_call_sync_sequence(clnt, server, &msg,
6839 &args.seq_args, &res.seq_res);
6840 if (status)
6841 return status;
6842
6843 renew_lease(server, now);
6844 return 0;
6845}
6846
6847#ifdef CONFIG_NFS_V4_1
6848
6849/*
6850 * This operation also signals the server that this client is
6851 * performing migration recovery. The server can stop asserting
6852 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6853 * performing this operation is identified in the SEQUENCE
6854 * operation in this compound.
6855 *
6856 * When the client supports GETATTR(fs_locations_info), it can
6857 * be plumbed in here.
6858 */
6859static int _nfs41_proc_get_locations(struct inode *inode,
6860 struct nfs4_fs_locations *locations,
6861 struct page *page, struct rpc_cred *cred)
6862{
6863 struct nfs_server *server = NFS_SERVER(inode);
6864 struct rpc_clnt *clnt = server->client;
6865 u32 bitmask[2] = {
6866 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6867 };
6868 struct nfs4_fs_locations_arg args = {
6869 .fh = NFS_FH(inode),
6870 .page = page,
6871 .bitmask = bitmask,
6872 .migration = 1, /* skip LOOKUP */
6873 };
6874 struct nfs4_fs_locations_res res = {
6875 .fs_locations = locations,
6876 .migration = 1,
6877 };
6878 struct rpc_message msg = {
6879 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6880 .rpc_argp = &args,
6881 .rpc_resp = &res,
6882 .rpc_cred = cred,
6883 };
6884 int status;
6885
6886 nfs_fattr_init(&locations->fattr);
6887 locations->server = server;
6888 locations->nlocations = 0;
6889
6890 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6891 nfs4_set_sequence_privileged(&args.seq_args);
6892 status = nfs4_call_sync_sequence(clnt, server, &msg,
6893 &args.seq_args, &res.seq_res);
6894 if (status == NFS4_OK &&
6895 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6896 status = -NFS4ERR_LEASE_MOVED;
6897 return status;
6898}
6899
6900#endif /* CONFIG_NFS_V4_1 */
6901
6902/**
6903 * nfs4_proc_get_locations - discover locations for a migrated FSID
6904 * @inode: inode on FSID that is migrating
6905 * @locations: result of query
6906 * @page: buffer
6907 * @cred: credential to use for this operation
6908 *
6909 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6910 * operation failed, or a negative errno if a local error occurred.
6911 *
6912 * On success, "locations" is filled in, but if the server has
6913 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6914 * asserted.
6915 *
6916 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6917 * from this client that require migration recovery.
6918 */
6919int nfs4_proc_get_locations(struct inode *inode,
6920 struct nfs4_fs_locations *locations,
6921 struct page *page, struct rpc_cred *cred)
6922{
6923 struct nfs_server *server = NFS_SERVER(inode);
6924 struct nfs_client *clp = server->nfs_client;
6925 const struct nfs4_mig_recovery_ops *ops =
6926 clp->cl_mvops->mig_recovery_ops;
6927 struct nfs4_exception exception = { };
6928 int status;
6929
6930 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6931 (unsigned long long)server->fsid.major,
6932 (unsigned long long)server->fsid.minor,
6933 clp->cl_hostname);
6934 nfs_display_fhandle(NFS_FH(inode), __func__);
6935
6936 do {
6937 status = ops->get_locations(inode, locations, page, cred);
6938 if (status != -NFS4ERR_DELAY)
6939 break;
6940 nfs4_handle_exception(server, status, &exception);
6941 } while (exception.retry);
6942 return status;
6943}
6944
44c99933
CL		 6945/*
6946 * This operation also signals the server that this client is
6947 * performing "lease moved" recovery. The server can stop
6948 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6949 * is appended to this compound to identify the client ID which is
6950 * performing recovery.
6951 */
6952static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6953{
6954 struct nfs_server *server = NFS_SERVER(inode);
6955 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6956 struct rpc_clnt *clnt = server->client;
6957 struct nfs4_fsid_present_arg args = {
6958 .fh = NFS_FH(inode),
6959 .clientid = clp->cl_clientid,
6960 .renew = 1, /* append RENEW */
6961 };
6962 struct nfs4_fsid_present_res res = {
6963 .renew = 1,
6964 };
6965 struct rpc_message msg = {
6966 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6967 .rpc_argp = &args,
6968 .rpc_resp = &res,
6969 .rpc_cred = cred,
6970 };
6971 unsigned long now = jiffies;
6972 int status;
6973
6974 res.fh = nfs_alloc_fhandle();
6975 if (res.fh == NULL)
6976 return -ENOMEM;
6977
6978 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6979 nfs4_set_sequence_privileged(&args.seq_args);
6980 status = nfs4_call_sync_sequence(clnt, server, &msg,
6981 &args.seq_args, &res.seq_res);
6982 nfs_free_fhandle(res.fh);
6983 if (status)
6984 return status;
6985
6986 do_renew_lease(clp, now);
6987 return 0;
6988}
6989
6990#ifdef CONFIG_NFS_V4_1
6991
6992/*
6993 * This operation also signals the server that this client is
6994 * performing "lease moved" recovery. The server can stop asserting
6995 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
6996 * this operation is identified in the SEQUENCE operation in this
6997 * compound.
6998 */
6999static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
7000{
7001 struct nfs_server *server = NFS_SERVER(inode);
7002 struct rpc_clnt *clnt = server->client;
7003 struct nfs4_fsid_present_arg args = {
7004 .fh = NFS_FH(inode),
7005 };
7006 struct nfs4_fsid_present_res res = {
7007 };
7008 struct rpc_message msg = {
7009 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
7010 .rpc_argp = &args,
7011 .rpc_resp = &res,
7012 .rpc_cred = cred,
7013 };
7014 int status;
7015
7016 res.fh = nfs_alloc_fhandle();
7017 if (res.fh == NULL)
7018 return -ENOMEM;
7019
7020 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
7021 nfs4_set_sequence_privileged(&args.seq_args);
7022 status = nfs4_call_sync_sequence(clnt, server, &msg,
7023 &args.seq_args, &res.seq_res);
7024 nfs_free_fhandle(res.fh);
7025 if (status == NFS4_OK &&
7026 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
7027 status = -NFS4ERR_LEASE_MOVED;
7028 return status;
7029}
7030
7031#endif /* CONFIG_NFS_V4_1 */
7032
7033/**
7034 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
7035 * @inode: inode on FSID to check
7036 * @cred: credential to use for this operation
7037 *
7038 * Server indicates whether the FSID is present, moved, or not
7039 * recognized. This operation is necessary to clear a LEASE_MOVED
7040 * condition for this client ID.
7041 *
7042 * Returns NFS4_OK if the FSID is present on this server,
7043 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
7044 * NFS4ERR code if some error occurred on the server, or a
7045 * negative errno if a local failure occurred.
7046 */
7047int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
7048{
7049 struct nfs_server *server = NFS_SERVER(inode);
7050 struct nfs_client *clp = server->nfs_client;
7051 const struct nfs4_mig_recovery_ops *ops =
7052 clp->cl_mvops->mig_recovery_ops;
7053 struct nfs4_exception exception = { };
7054 int status;
7055
7056 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
7057 (unsigned long long)server->fsid.major,
7058 (unsigned long long)server->fsid.minor,
7059 clp->cl_hostname);
7060 nfs_display_fhandle(NFS_FH(inode), __func__);
7061
7062 do {
7063 status = ops->fsid_present(inode, cred);
7064 if (status != -NFS4ERR_DELAY)
7065 break;
7066 nfs4_handle_exception(server, status, &exception);
7067 } while (exception.retry);
7068 return status;
7069}
7070
5ec16a85 7071/**
a5250def
WAA		 7072 * If 'use_integrity' is true and the state managment nfs_client
7073 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
7074 * and the machine credential as per RFC3530bis and RFC5661 Security
7075 * Considerations sections. Otherwise, just use the user cred with the
7076 * filesystem's rpc_client.
5ec16a85 7077 */
a5250def 7078static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
5a5ea0d4
BS		 7079{
7080 int status;
7081 struct nfs4_secinfo_arg args = {
7082 .dir_fh = NFS_FH(dir),
7083 .name = name,
7084 };
7085 struct nfs4_secinfo_res res = {
7086 .flavors = flavors,
7087 };
7088 struct rpc_message msg = {
7089 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
7090 .rpc_argp = &args,
7091 .rpc_resp = &res,
7092 };
a5250def 7093 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
7cb852df 7094 struct rpc_cred *cred = NULL;
a5250def
WAA		 7095
7096 if (use_integrity) {
7097 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
7cb852df
WAA		 7098 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
7099 msg.rpc_cred = cred;
a5250def 7100 }
5a5ea0d4
BS		 7101
7102 dprintk("NFS call secinfo %s\n", name->name);
8b5bee2e
WAA		 7103
7104 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
7105 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
7106
a5250def
WAA		 7107 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
7108 &res.seq_res, 0);
5a5ea0d4 7109 dprintk("NFS reply secinfo: %d\n", status);
a5250def 7110
7cb852df
WAA		 7111 if (cred)
7112 put_rpccred(cred);
a5250def 7113
5a5ea0d4
BS		 7114 return status;
7115}
7116
72de53ec
BS		 7117int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
7118 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 7119{
7120 struct nfs4_exception exception = { };
7121 int err;
7122 do {
a5250def
WAA		 7123 err = -NFS4ERR_WRONGSEC;
7124
7125 /* try to use integrity protection with machine cred */
7126 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
7127 err = _nfs4_proc_secinfo(dir, name, flavors, true);
7128
7129 /*
7130 * if unable to use integrity protection, or SECINFO with
7131 * integrity protection returns NFS4ERR_WRONGSEC (which is
7132 * disallowed by spec, but exists in deployed servers) use
7133 * the current filesystem's rpc_client and the user cred.
7134 */
7135 if (err == -NFS4ERR_WRONGSEC)
7136 err = _nfs4_proc_secinfo(dir, name, flavors, false);
7137
078ea3df
TM		 7138 trace_nfs4_secinfo(dir, name, err);
7139 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5a5ea0d4
BS		 7140 &exception);
7141 } while (exception.retry);
7142 return err;
7143}
7144
557134a3 7145#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 7146/*
7147 * Check the exchange flags returned by the server for invalid flags, having
7148 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
7149 * DS flags set.
7150 */
7151static int nfs4_check_cl_exchange_flags(u32 flags)
7152{
7153 if (flags & ~EXCHGID4_FLAG_MASK_R)
7154 goto out_inval;
7155 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
7156 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
7157 goto out_inval;
7158 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
7159 goto out_inval;
7160 return NFS_OK;
7161out_inval:
7162 return -NFS4ERR_INVAL;
7163}
7164
78fe0f41 7165static bool
79d4e1f0
CL		 7166nfs41_same_server_scope(struct nfs41_server_scope *a,
7167 struct nfs41_server_scope *b)
78fe0f41 7168{
49ad0145
AS		 7169 if (a->server_scope_sz != b->server_scope_sz)
7170 return false;
7171 return memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0;
78fe0f41
WAA		 7172}
7173
02a95dee
AA		 7174static void
7175nfs4_bind_one_conn_to_session_done(struct rpc_task *task, void *calldata)
7176{
7177}
7178
7179static const struct rpc_call_ops nfs4_bind_one_conn_to_session_ops = {
7180 .rpc_call_done = &nfs4_bind_one_conn_to_session_done,
7181};
7182
7c44f1ae 7183/*
d9ddbf5d 7184 * nfs4_proc_bind_one_conn_to_session()
7c44f1ae
WAA		 7185 *
7186 * The 4.1 client currently uses the same TCP connection for the
7187 * fore and backchannel.
7188 */
d9ddbf5d
TM		 7189static
7190int nfs4_proc_bind_one_conn_to_session(struct rpc_clnt *clnt,
7191 struct rpc_xprt *xprt,
7192 struct nfs_client *clp,
7193 struct rpc_cred *cred)
7c44f1ae
WAA		 7194{
7195 int status;
71a097c6
TM		 7196 struct nfs41_bind_conn_to_session_args args = {
7197 .client = clp,
7198 .dir = NFS4_CDFC4_FORE_OR_BOTH,
7199 };
7c44f1ae
WAA		 7200 struct nfs41_bind_conn_to_session_res res;
7201 struct rpc_message msg = {
7202 .rpc_proc =
7203 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
71a097c6 7204 .rpc_argp = &args,
7c44f1ae 7205 .rpc_resp = &res,
2cf047c9 7206 .rpc_cred = cred,
7c44f1ae 7207 };
d9ddbf5d
TM		 7208 struct rpc_task_setup task_setup_data = {
7209 .rpc_client = clnt,
7210 .rpc_xprt = xprt,
02a95dee 7211 .callback_ops = &nfs4_bind_one_conn_to_session_ops,
d9ddbf5d
TM		 7212 .rpc_message = &msg,
7213 .flags = RPC_TASK_TIMEOUT,
7214 };
7215 struct rpc_task *task;
7c44f1ae 7216
71a097c6
TM		 7217 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id);
7218 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN))
7219 args.dir = NFS4_CDFC4_FORE;
7c44f1ae 7220
d9ddbf5d
TM		 7221 /* Do not set the backchannel flag unless this is clnt->cl_xprt */
7222 if (xprt != rcu_access_pointer(clnt->cl_xprt))
7223 args.dir = NFS4_CDFC4_FORE;
7224
7225 task = rpc_run_task(&task_setup_data);
7226 if (!IS_ERR(task)) {
7227 status = task->tk_status;
7228 rpc_put_task(task);
7229 } else
7230 status = PTR_ERR(task);
c6d01c6f 7231 trace_nfs4_bind_conn_to_session(clp, status);
7c44f1ae 7232 if (status == 0) {
71a097c6 7233 if (memcmp(res.sessionid.data,
7c44f1ae
WAA		 7234 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
7235 dprintk("NFS: %s: Session ID mismatch\n", __func__);
c7ae7639 7236 return -EIO;
7c44f1ae 7237 }
71a097c6 7238 if ((res.dir & args.dir) != res.dir || res.dir == 0) {
7c44f1ae
WAA		 7239 dprintk("NFS: %s: Unexpected direction from server\n",
7240 __func__);
c7ae7639 7241 return -EIO;
7c44f1ae 7242 }
71a097c6 7243 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) {
7c44f1ae
WAA		 7244 dprintk("NFS: %s: Server returned RDMA mode = true\n",
7245 __func__);
c7ae7639 7246 return -EIO;
7c44f1ae
WAA		 7247 }
7248 }
c7ae7639 7249
7c44f1ae
WAA		 7250 return status;
7251}
7252
d9ddbf5d
TM		 7253struct rpc_bind_conn_calldata {
7254 struct nfs_client *clp;
7255 struct rpc_cred *cred;
7256};
7257
7258static int
7259nfs4_proc_bind_conn_to_session_callback(struct rpc_clnt *clnt,
7260 struct rpc_xprt *xprt,
7261 void *calldata)
7262{
7263 struct rpc_bind_conn_calldata *p = calldata;
7264
7265 return nfs4_proc_bind_one_conn_to_session(clnt, xprt, p->clp, p->cred);
7266}
7267
7268int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7269{
7270 struct rpc_bind_conn_calldata data = {
7271 .clp = clp,
7272 .cred = cred,
7273 };
7274 return rpc_clnt_iterate_for_each_xprt(clp->cl_rpcclient,
7275 nfs4_proc_bind_conn_to_session_callback, &data);
7276}
7277
99fe60d0 7278/*
fa940720
WAA		 7279 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
7280 * and operations we'd like to see to enable certain features in the allow map
2031cd1a
WAA		 7281 */
7282static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
7283 .how = SP4_MACH_CRED,
7284 .enforce.u.words = {
7285 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
7286 1 << (OP_EXCHANGE_ID - 32) |
7287 1 << (OP_CREATE_SESSION - 32) |
7288 1 << (OP_DESTROY_SESSION - 32) |
7289 1 << (OP_DESTROY_CLIENTID - 32)
fa940720
WAA		 7290 },
7291 .allow.u.words = {
7292 [0] = 1 << (OP_CLOSE) |
99ade3c7 7293 1 << (OP_OPEN_DOWNGRADE) |
a0279625 7294 1 << (OP_LOCKU) |
99ade3c7 7295 1 << (OP_DELEGRETURN) |
a0279625 7296 1 << (OP_COMMIT),
8b5bee2e 7297 [1] = 1 << (OP_SECINFO - 32) |
3787d506 7298 1 << (OP_SECINFO_NO_NAME - 32) |
99ade3c7 7299 1 << (OP_LAYOUTRETURN - 32) |
3787d506 7300 1 << (OP_TEST_STATEID - 32) |
a0279625
WAA		 7301 1 << (OP_FREE_STATEID - 32) |
7302 1 << (OP_WRITE - 32)
2031cd1a
WAA		 7303 }
7304};
7305
7306/*
7307 * Select the state protection mode for client `clp' given the server results
7308 * from exchange_id in `sp'.
99fe60d0 7309 *
2031cd1a
WAA		 7310 * Returns 0 on success, negative errno otherwise.
7311 */
7312static int nfs4_sp4_select_mode(struct nfs_client *clp,
7313 struct nfs41_state_protection *sp)
7314{
7315 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
7316 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
7317 1 << (OP_EXCHANGE_ID - 32) |
7318 1 << (OP_CREATE_SESSION - 32) |
7319 1 << (OP_DESTROY_SESSION - 32) |
7320 1 << (OP_DESTROY_CLIENTID - 32)
7321 };
7322 unsigned int i;
7323
7324 if (sp->how == SP4_MACH_CRED) {
7325 /* Print state protect result */
7326 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
7327 for (i = 0; i <= LAST_NFS4_OP; i++) {
7328 if (test_bit(i, sp->enforce.u.longs))
7329 dfprintk(MOUNT, " enforce op %d\n", i);
7330 if (test_bit(i, sp->allow.u.longs))
7331 dfprintk(MOUNT, " allow op %d\n", i);
7332 }
7333
7334 /* make sure nothing is on enforce list that isn't supported */
7335 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
7336 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
7337 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
7338 return -EINVAL;
7339 }
7340 }
7341
7342 /*
7343 * Minimal mode - state operations are allowed to use machine
7344 * credential. Note this already happens by default, so the
7345 * client doesn't have to do anything more than the negotiation.
7346 *
7347 * NOTE: we don't care if EXCHANGE_ID is in the list -
7348 * we're already using the machine cred for exchange_id
7349 * and will never use a different cred.
7350 */
7351 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
7352 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
7353 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
7354 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
7355 dfprintk(MOUNT, "sp4_mach_cred:\n");
7356 dfprintk(MOUNT, " minimal mode enabled\n");
7357 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
7358 } else {
7359 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
7360 return -EINVAL;
7361 }
fa940720
WAA		 7362
7363 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
99ade3c7
AE		 7364 test_bit(OP_OPEN_DOWNGRADE, sp->allow.u.longs) &&
7365 test_bit(OP_DELEGRETURN, sp->allow.u.longs) &&
fa940720
WAA		 7366 test_bit(OP_LOCKU, sp->allow.u.longs)) {
7367 dfprintk(MOUNT, " cleanup mode enabled\n");
7368 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
7369 }
8b5bee2e 7370
99ade3c7
AE		 7371 if (test_bit(OP_LAYOUTRETURN, sp->allow.u.longs)) {
7372 dfprintk(MOUNT, " pnfs cleanup mode enabled\n");
7373 set_bit(NFS_SP4_MACH_CRED_PNFS_CLEANUP,
7374 &clp->cl_sp4_flags);
7375 }
7376
8b5bee2e
WAA		 7377 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
7378 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
7379 dfprintk(MOUNT, " secinfo mode enabled\n");
7380 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
7381 }
3787d506
WAA		 7382
7383 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
7384 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
7385 dfprintk(MOUNT, " stateid mode enabled\n");
7386 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
7387 }
8c21c62c
WAA		 7388
7389 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
7390 dfprintk(MOUNT, " write mode enabled\n");
7391 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
7392 }
7393
7394 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
7395 dfprintk(MOUNT, " commit mode enabled\n");
7396 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
7397 }
2031cd1a
WAA		 7398 }
7399
7400 return 0;
7401}
7402
8d89bd70
AA		 7403struct nfs41_exchange_id_data {
7404 struct nfs41_exchange_id_res res;
7405 struct nfs41_exchange_id_args args;
ad0849a7 7406 struct rpc_xprt *xprt;
8d89bd70
AA		 7407 int rpc_status;
7408};
7409
7410static void nfs4_exchange_id_done(struct rpc_task *task, void *data)
7411{
7412 struct nfs41_exchange_id_data *cdata =
7413 (struct nfs41_exchange_id_data *)data;
7414 struct nfs_client *clp = cdata->args.client;
7415 int status = task->tk_status;
7416
7417 trace_nfs4_exchange_id(clp, status);
7418
7419 if (status == 0)
7420 status = nfs4_check_cl_exchange_flags(cdata->res.flags);
ad0849a7
AA		 7421
7422 if (cdata->xprt && status == 0) {
7423 status = nfs4_detect_session_trunking(clp, &cdata->res,
7424 cdata->xprt);
7425 goto out;
7426 }
7427
8d89bd70
AA		 7428 if (status == 0)
7429 status = nfs4_sp4_select_mode(clp, &cdata->res.state_protect);
7430
7431 if (status == 0) {
7432 clp->cl_clientid = cdata->res.clientid;
7433 clp->cl_exchange_flags = cdata->res.flags;
838edb94 7434 clp->cl_seqid = cdata->res.seqid;
8d89bd70 7435 /* Client ID is not confirmed */
838edb94 7436 if (!(cdata->res.flags & EXCHGID4_FLAG_CONFIRMED_R))
8d89bd70 7437 clear_bit(NFS4_SESSION_ESTABLISHED,
838edb94 7438 &clp->cl_session->session_state);
8d89bd70
AA		 7439
7440 kfree(clp->cl_serverowner);
7441 clp->cl_serverowner = cdata->res.server_owner;
7442 cdata->res.server_owner = NULL;
7443
7444 /* use the most recent implementation id */
7445 kfree(clp->cl_implid);
7446 clp->cl_implid = cdata->res.impl_id;
7447 cdata->res.impl_id = NULL;
7448
7449 if (clp->cl_serverscope != NULL &&
7450 !nfs41_same_server_scope(clp->cl_serverscope,
7451 cdata->res.server_scope)) {
7452 dprintk("%s: server_scope mismatch detected\n",
7453 __func__);
7454 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
7455 kfree(clp->cl_serverscope);
7456 clp->cl_serverscope = NULL;
7457 }
7458
7459 if (clp->cl_serverscope == NULL) {
7460 clp->cl_serverscope = cdata->res.server_scope;
7461 cdata->res.server_scope = NULL;
7462 }
ad0849a7
AA		 7463 /* Save the EXCHANGE_ID verifier session trunk tests */
7464 memcpy(clp->cl_confirm.data, cdata->args.verifier->data,
7465 sizeof(clp->cl_confirm.data));
8d89bd70 7466 }
ad0849a7 7467out:
8d89bd70 7468 cdata->rpc_status = status;
ad0849a7 7469 return;
8d89bd70
AA		 7470}
7471
7472static void nfs4_exchange_id_release(void *data)
7473{
7474 struct nfs41_exchange_id_data *cdata =
7475 (struct nfs41_exchange_id_data *)data;
7476
ad0849a7
AA		 7477 if (cdata->xprt) {
7478 xprt_put(cdata->xprt);
7479 rpc_clnt_xprt_switch_put(cdata->args.client->cl_rpcclient);
7480 }
63513232 7481 nfs_put_client(cdata->args.client);
8d89bd70
AA		 7482 kfree(cdata->res.impl_id);
7483 kfree(cdata->res.server_scope);
7484 kfree(cdata->res.server_owner);
7485 kfree(cdata);
7486}
7487
7488static const struct rpc_call_ops nfs4_exchange_id_call_ops = {
7489 .rpc_call_done = nfs4_exchange_id_done,
7490 .rpc_release = nfs4_exchange_id_release,
7491};
7492
2031cd1a
WAA		 7493/*
7494 * _nfs4_proc_exchange_id()
6bbb4ae8 7495 *
2031cd1a 7496 * Wrapper for EXCHANGE_ID operation.
99fe60d0 7497 */
2031cd1a 7498static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
ad0849a7 7499 u32 sp4_how, struct rpc_xprt *xprt)
99fe60d0
BH		 7500{
7501 nfs4_verifier verifier;
99fe60d0
BH		 7502 struct rpc_message msg = {
7503 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
99fe60d0
BH		 7504 .rpc_cred = cred,
7505 };
8d89bd70
AA		 7506 struct rpc_task_setup task_setup_data = {
7507 .rpc_client = clp->cl_rpcclient,
7508 .callback_ops = &nfs4_exchange_id_call_ops,
7509 .rpc_message = &msg,
7510 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
7511 };
7512 struct nfs41_exchange_id_data *calldata;
7513 struct rpc_task *task;
e917f0d1 7514 int status;
8d89bd70
AA		 7515
7516 if (!atomic_inc_not_zero(&clp->cl_count))
e917f0d1 7517 return -EIO;
8d89bd70 7518
8d89bd70 7519 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
5c737cb2
DW		 7520 if (!calldata) {
7521 nfs_put_client(clp);
e917f0d1 7522 return -ENOMEM;
5c737cb2 7523 }
99fe60d0 7524
ad0849a7
AA		 7525 if (!xprt)
7526 nfs4_init_boot_verifier(clp, &verifier);
873e3851
JL		 7527
7528 status = nfs4_init_uniform_client_string(clp);
7529 if (status)
8d89bd70 7530 goto out_calldata;
3a6bb738 7531
8d89bd70
AA		 7532 calldata->res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
7533 GFP_NOFS);
7534 status = -ENOMEM;
7535 if (unlikely(calldata->res.server_owner == NULL))
7536 goto out_calldata;
78fe0f41 7537
8d89bd70 7538 calldata->res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 7539 GFP_NOFS);
8d89bd70 7540 if (unlikely(calldata->res.server_scope == NULL))
acdeb69d 7541 goto out_server_owner;
78fe0f41 7542
8d89bd70
AA		 7543 calldata->res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
7544 if (unlikely(calldata->res.impl_id == NULL))
7d2ed9ac 7545 goto out_server_scope;
7d2ed9ac 7546
2031cd1a
WAA		 7547 switch (sp4_how) {
7548 case SP4_NONE:
8d89bd70 7549 calldata->args.state_protect.how = SP4_NONE;
2031cd1a
WAA		 7550 break;
7551
7552 case SP4_MACH_CRED:
8d89bd70 7553 calldata->args.state_protect = nfs4_sp4_mach_cred_request;
2031cd1a
WAA		 7554 break;
7555
7556 default:
7557 /* unsupported! */
7558 WARN_ON_ONCE(1);
7559 status = -EINVAL;
6b55970b 7560 goto out_impl_id;
2031cd1a 7561 }
ad0849a7
AA		 7562 if (xprt) {
7563 calldata->xprt = xprt;
7564 task_setup_data.rpc_xprt = xprt;
7565 task_setup_data.flags =
7566 RPC_TASK_SOFT|RPC_TASK_SOFTCONN|RPC_TASK_ASYNC;
7567 calldata->args.verifier = &clp->cl_confirm;
7568 } else {
7569 calldata->args.verifier = &verifier;
7570 }
8d89bd70
AA		 7571 calldata->args.client = clp;
7572#ifdef CONFIG_NFS_V4_1_MIGRATION
7573 calldata->args.flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
7574 EXCHGID4_FLAG_BIND_PRINC_STATEID |
7575 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
7576#else
7577 calldata->args.flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
7578 EXCHGID4_FLAG_BIND_PRINC_STATEID,
7579#endif
7580 msg.rpc_argp = &calldata->args;
7581 msg.rpc_resp = &calldata->res;
7582 task_setup_data.callback_data = calldata;
2031cd1a 7583
8d89bd70 7584 task = rpc_run_task(&task_setup_data);
63513232
OK		 7585 if (IS_ERR(task))
7586 return PTR_ERR(task);
7d2ed9ac 7587
ad0849a7
AA		 7588 if (!xprt) {
7589 status = rpc_wait_for_completion_task(task);
7590 if (!status)
7591 status = calldata->rpc_status;
7592 } else /* session trunking test */
8d89bd70 7593 status = calldata->rpc_status;
ad0849a7 7594
8d89bd70 7595 rpc_put_task(task);
abe9a6d5 7596out:
99fe60d0 7597 return status;
8d89bd70
AA		 7598
7599out_impl_id:
7600 kfree(calldata->res.impl_id);
7601out_server_scope:
7602 kfree(calldata->res.server_scope);
7603out_server_owner:
7604 kfree(calldata->res.server_owner);
7605out_calldata:
7606 kfree(calldata);
63513232 7607 nfs_put_client(clp);
8d89bd70 7608 goto out;
99fe60d0
BH		 7609}
7610
2031cd1a
WAA		 7611/*
7612 * nfs4_proc_exchange_id()
7613 *
7614 * Returns zero, a negative errno, or a negative NFS4ERR status code.
7615 *
7616 * Since the clientid has expired, all compounds using sessions
7617 * associated with the stale clientid will be returning
7618 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
7619 * be in some phase of session reset.
7620 *
7621 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
7622 */
7623int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
7624{
7625 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
7626 int status;
7627
7628 /* try SP4_MACH_CRED if krb5i/p */
7629 if (authflavor == RPC_AUTH_GSS_KRB5I ||
7630 authflavor == RPC_AUTH_GSS_KRB5P) {
ad0849a7 7631 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED, NULL);
2031cd1a
WAA		 7632 if (!status)
7633 return 0;
7634 }
7635
7636 /* try SP4_NONE */
ad0849a7 7637 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE, NULL);
2031cd1a
WAA		 7638}
7639
04fa2c6b
AA		 7640/**
7641 * nfs4_test_session_trunk
7642 *
7643 * This is an add_xprt_test() test function called from
7644 * rpc_clnt_setup_test_and_add_xprt.
7645 *
7646 * The rpc_xprt_switch is referrenced by rpc_clnt_setup_test_and_add_xprt
7647 * and is dereferrenced in nfs4_exchange_id_release
7648 *
7649 * Upon success, add the new transport to the rpc_clnt
7650 *
7651 * @clnt: struct rpc_clnt to get new transport
7652 * @xprt: the rpc_xprt to test
7653 * @data: call data for _nfs4_proc_exchange_id.
7654 */
7655int nfs4_test_session_trunk(struct rpc_clnt *clnt, struct rpc_xprt *xprt,
7656 void *data)
7657{
7658 struct nfs4_add_xprt_data *adata = (struct nfs4_add_xprt_data *)data;
7659 u32 sp4_how;
7660
7661 dprintk("--> %s try %s\n", __func__,
7662 xprt->address_strings[RPC_DISPLAY_ADDR]);
7663
7664 sp4_how = (adata->clp->cl_sp4_flags == 0 ? SP4_NONE : SP4_MACH_CRED);
7665
7666 /* Test connection for session trunking. Async exchange_id call */
7667 return _nfs4_proc_exchange_id(adata->clp, adata->cred, sp4_how, xprt);
2031cd1a 7668}
04fa2c6b 7669EXPORT_SYMBOL_GPL(nfs4_test_session_trunk);
2031cd1a 7670
66245539
TM		 7671static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
7672 struct rpc_cred *cred)
7673{
7674 struct rpc_message msg = {
7675 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
7676 .rpc_argp = clp,
7677 .rpc_cred = cred,
7678 };
7679 int status;
7680
7681 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7682 trace_nfs4_destroy_clientid(clp, status);
66245539 7683 if (status)
02c67525 7684 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 7685 "DESTROY_CLIENTID.", status, clp->cl_hostname);
7686 return status;
7687}
7688
7689static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
7690 struct rpc_cred *cred)
7691{
7692 unsigned int loop;
7693 int ret;
7694
7695 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
7696 ret = _nfs4_proc_destroy_clientid(clp, cred);
7697 switch (ret) {
7698 case -NFS4ERR_DELAY:
7699 case -NFS4ERR_CLIENTID_BUSY:
7700 ssleep(1);
7701 break;
7702 default:
7703 return ret;
7704 }
7705 }
7706 return 0;
7707}
7708
7709int nfs4_destroy_clientid(struct nfs_client *clp)
7710{
7711 struct rpc_cred *cred;
7712 int ret = 0;
7713
7714 if (clp->cl_mvops->minor_version < 1)
7715 goto out;
7716 if (clp->cl_exchange_flags == 0)
7717 goto out;
05f4c350
CL		 7718 if (clp->cl_preserve_clid)
7719 goto out;
73d8bde5 7720 cred = nfs4_get_clid_cred(clp);
66245539
TM		 7721 ret = nfs4_proc_destroy_clientid(clp, cred);
7722 if (cred)
7723 put_rpccred(cred);
7724 switch (ret) {
7725 case 0:
7726 case -NFS4ERR_STALE_CLIENTID:
7727 clp->cl_exchange_flags = 0;
7728 }
7729out:
7730 return ret;
7731}
7732
2050f0cc
AA		 7733struct nfs4_get_lease_time_data {
7734 struct nfs4_get_lease_time_args *args;
7735 struct nfs4_get_lease_time_res *res;
7736 struct nfs_client *clp;
7737};
7738
7739static void nfs4_get_lease_time_prepare(struct rpc_task *task,
7740 void *calldata)
7741{
2050f0cc
AA		 7742 struct nfs4_get_lease_time_data *data =
7743 (struct nfs4_get_lease_time_data *)calldata;
7744
7745 dprintk("--> %s\n", __func__);
7746 /* just setup sequence, do not trigger session recovery
7747 since we're invoked within one */
7981c8a6 7748 nfs4_setup_sequence(data->clp,
d9afbd1b
TM		 7749 &data->args->la_seq_args,
7750 &data->res->lr_seq_res,
7751 task);
2050f0cc
AA		 7752 dprintk("<-- %s\n", __func__);
7753}
7754
7755/*
7756 * Called from nfs4_state_manager thread for session setup, so don't recover
7757 * from sequence operation or clientid errors.
7758 */
7759static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
7760{
7761 struct nfs4_get_lease_time_data *data =
7762 (struct nfs4_get_lease_time_data *)calldata;
7763
7764 dprintk("--> %s\n", __func__);
14516c3a
TM		 7765 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
7766 return;
2050f0cc
AA		 7767 switch (task->tk_status) {
7768 case -NFS4ERR_DELAY:
7769 case -NFS4ERR_GRACE:
7770 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
7771 rpc_delay(task, NFS4_POLL_RETRY_MIN);
7772 task->tk_status = 0;
a8a4ae3a
AA		 7773 /* fall through */
7774 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 7775 rpc_restart_call_prepare(task);
2050f0cc
AA		 7776 return;
7777 }
2050f0cc
AA		 7778 dprintk("<-- %s\n", __func__);
7779}
7780
17280175 7781static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 7782 .rpc_call_prepare = nfs4_get_lease_time_prepare,
7783 .rpc_call_done = nfs4_get_lease_time_done,
7784};
7785
7786int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
7787{
7788 struct rpc_task *task;
7789 struct nfs4_get_lease_time_args args;
7790 struct nfs4_get_lease_time_res res = {
7791 .lr_fsinfo = fsinfo,
7792 };
7793 struct nfs4_get_lease_time_data data = {
7794 .args = &args,
7795 .res = &res,
7796 .clp = clp,
7797 };
7798 struct rpc_message msg = {
7799 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
7800 .rpc_argp = &args,
7801 .rpc_resp = &res,
7802 };
7803 struct rpc_task_setup task_setup = {
7804 .rpc_client = clp->cl_rpcclient,
7805 .rpc_message = &msg,
7806 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 7807 .callback_data = &data,
7808 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 7809 };
7810 int status;
7811
a9c92d6b 7812 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 7813 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 7814 task = rpc_run_task(&task_setup);
7815
7816 if (IS_ERR(task))
f6148713 7817 return PTR_ERR(task);
2050f0cc 7818
f6148713
AS		 7819 status = task->tk_status;
7820 rpc_put_task(task);
2050f0cc
AA		 7821 return status;
7822}
7823
fc931582
AA		 7824/*
7825 * Initialize the values to be used by the client in CREATE_SESSION
7826 * If nfs4_init_session set the fore channel request and response sizes,
7827 * use them.
7828 *
7829 * Set the back channel max_resp_sz_cached to zero to force the client to
7830 * always set csa_cachethis to FALSE because the current implementation
7831 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
7832 */
6b26cc8c
CL		 7833static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args,
7834 struct rpc_clnt *clnt)
fc931582 7835{
18aad3d5 7836 unsigned int max_rqst_sz, max_resp_sz;
6b26cc8c 7837 unsigned int max_bc_payload = rpc_max_bc_payload(clnt);
18aad3d5
AA		 7838
7839 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
7840 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 7841
fc931582 7842 /* Fore channel attributes */
18aad3d5
AA		 7843 args->fc_attrs.max_rqst_sz = max_rqst_sz;
7844 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 7845 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 7846 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 7847
7848 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 7849 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 7850 __func__,
7851 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 7852 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 7853
7854 /* Back channel attributes */
6b26cc8c
CL		 7855 args->bc_attrs.max_rqst_sz = max_bc_payload;
7856 args->bc_attrs.max_resp_sz = max_bc_payload;
fc931582
AA		 7857 args->bc_attrs.max_resp_sz_cached = 0;
7858 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5405fc44 7859 args->bc_attrs.max_reqs = min_t(unsigned short, max_session_cb_slots, 1);
fc931582
AA		 7860
7861 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
7862 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
7863 __func__,
7864 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
7865 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
7866 args->bc_attrs.max_reqs);
7867}
7868
79969dd1
TM		 7869static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args,
7870 struct nfs41_create_session_res *res)
8d35301d 7871{
43c2e885 7872 struct nfs4_channel_attrs *sent = &args->fc_attrs;
79969dd1 7873 struct nfs4_channel_attrs *rcvd = &res->fc_attrs;
43c2e885 7874
43c2e885
BF		 7875 if (rcvd->max_resp_sz > sent->max_resp_sz)
7876 return -EINVAL;
7877 /*
7878 * Our requested max_ops is the minimum we need; we're not
7879 * prepared to break up compounds into smaller pieces than that.
7880 * So, no point even trying to continue if the server won't
7881 * cooperate:
7882 */
7883 if (rcvd->max_ops < sent->max_ops)
7884 return -EINVAL;
7885 if (rcvd->max_reqs == 0)
7886 return -EINVAL;
b4b9a0c1
VG		 7887 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
7888 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 7889 return 0;
8d35301d
AA		 7890}
7891
79969dd1
TM		 7892static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args,
7893 struct nfs41_create_session_res *res)
43c2e885
BF		 7894{
7895 struct nfs4_channel_attrs *sent = &args->bc_attrs;
79969dd1 7896 struct nfs4_channel_attrs *rcvd = &res->bc_attrs;
8d35301d 7897
b1c0df5f
TM		 7898 if (!(res->flags & SESSION4_BACK_CHAN))
7899 goto out;
43c2e885
BF		 7900 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
7901 return -EINVAL;
7902 if (rcvd->max_resp_sz < sent->max_resp_sz)
7903 return -EINVAL;
7904 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7905 return -EINVAL;
5405fc44 7906 if (rcvd->max_ops > sent->max_ops)
43c2e885 7907 return -EINVAL;
5405fc44 7908 if (rcvd->max_reqs > sent->max_reqs)
43c2e885 7909 return -EINVAL;
b1c0df5f 7910out:
43c2e885
BF		 7911 return 0;
7912}
8d35301d 7913
8d35301d 7914static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
79969dd1 7915 struct nfs41_create_session_res *res)
8d35301d 7916{
43c2e885 7917 int ret;
8d35301d 7918
79969dd1 7919 ret = nfs4_verify_fore_channel_attrs(args, res);
43c2e885
BF		 7920 if (ret)
7921 return ret;
79969dd1
TM		 7922 return nfs4_verify_back_channel_attrs(args, res);
7923}
7924
7925static void nfs4_update_session(struct nfs4_session *session,
7926 struct nfs41_create_session_res *res)
7927{
7928 nfs4_copy_sessionid(&session->sess_id, &res->sessionid);
e11259f9
TM		 7929 /* Mark client id and session as being confirmed */
7930 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;
7931 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state);
79969dd1
TM		 7932 session->flags = res->flags;
7933 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs));
b1c0df5f
TM		 7934 if (res->flags & SESSION4_BACK_CHAN)
7935 memcpy(&session->bc_attrs, &res->bc_attrs,
7936 sizeof(session->bc_attrs));
8d35301d
AA		 7937}
7938
848f5bda
TM		 7939static int _nfs4_proc_create_session(struct nfs_client *clp,
7940 struct rpc_cred *cred)
fc931582
AA		 7941{
7942 struct nfs4_session *session = clp->cl_session;
7943 struct nfs41_create_session_args args = {
7944 .client = clp,
79969dd1
TM		 7945 .clientid = clp->cl_clientid,
7946 .seqid = clp->cl_seqid,
fc931582
AA		 7947 .cb_program = NFS4_CALLBACK,
7948 };
79969dd1
TM		 7949 struct nfs41_create_session_res res;
7950
fc931582
AA		 7951 struct rpc_message msg = {
7952 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
7953 .rpc_argp = &args,
7954 .rpc_resp = &res,
848f5bda 7955 .rpc_cred = cred,
fc931582
AA		 7956 };
7957 int status;
7958
6b26cc8c 7959 nfs4_init_channel_attrs(&args, clp->cl_rpcclient);
0f91421e 7960 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 7961
1bd714f2 7962 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7963 trace_nfs4_create_session(clp, status);
fc931582 7964
b519d408
TM		 7965 switch (status) {
7966 case -NFS4ERR_STALE_CLIENTID:
7967 case -NFS4ERR_DELAY:
7968 case -ETIMEDOUT:
7969 case -EACCES:
7970 case -EAGAIN:
7971 goto out;
7972 };
7973
7974 clp->cl_seqid++;
43095d39 7975 if (!status) {
8d35301d 7976 /* Verify the session's negotiated channel_attrs values */
79969dd1 7977 status = nfs4_verify_channel_attrs(&args, &res);
fc931582 7978 /* Increment the clientid slot sequence id */
79969dd1
TM		 7979 if (status)
7980 goto out;
7981 nfs4_update_session(session, &res);
fc931582 7982 }
79969dd1 7983out:
fc931582
AA		 7984 return status;
7985}
7986
7987/*
7988 * Issues a CREATE_SESSION operation to the server.
7989 * It is the responsibility of the caller to verify the session is
7990 * expired before calling this routine.
7991 */
848f5bda 7992int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 7993{
7994 int status;
7995 unsigned *ptr;
fc931582
AA		 7996 struct nfs4_session *session = clp->cl_session;
7997
7998 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
7999
848f5bda 8000 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 8001 if (status)
8002 goto out;
8003
aacd5537
AA		 8004 /* Init or reset the session slot tables */
8005 status = nfs4_setup_session_slot_tables(session);
8006 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 8007 if (status)
8008 goto out;
8009
8010 ptr = (unsigned *)&session->sess_id.data[0];
8011 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
8012 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 8013out:
8014 dprintk("<-- %s\n", __func__);
8015 return status;
8016}
8017
0f3e66c6
AA		 8018/*
8019 * Issue the over-the-wire RPC DESTROY_SESSION.
8020 * The caller must serialize access to this routine.
8021 */
848f5bda
TM		 8022int nfs4_proc_destroy_session(struct nfs4_session *session,
8023 struct rpc_cred *cred)
0f3e66c6 8024{
848f5bda
TM		 8025 struct rpc_message msg = {
8026 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
8027 .rpc_argp = session,
8028 .rpc_cred = cred,
8029 };
0f3e66c6 8030 int status = 0;
0f3e66c6
AA		 8031
8032 dprintk("--> nfs4_proc_destroy_session\n");
8033
8034 /* session is still being setup */
e11259f9
TM		 8035 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state))
8036 return 0;
0f3e66c6 8037
1bd714f2 8038 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 8039 trace_nfs4_destroy_session(session->clp, status);
0f3e66c6
AA		 8040
8041 if (status)
08106ac7 8042 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 8043 "Session has been destroyed regardless...\n", status);
8044
8045 dprintk("<-- nfs4_proc_destroy_session\n");
8046 return status;
8047}
8048
fc01cea9
AA		 8049/*
8050 * Renew the cl_session lease.
8051 */
d5f8d3fe
TM		 8052struct nfs4_sequence_data {
8053 struct nfs_client *clp;
8054 struct nfs4_sequence_args args;
8055 struct nfs4_sequence_res res;
8056};
8057
dc96aef9
AB		 8058static void nfs41_sequence_release(void *data)
8059{
d5f8d3fe
TM		 8060 struct nfs4_sequence_data *calldata = data;
8061 struct nfs_client *clp = calldata->clp;
dc96aef9 8062
7135840f
AB		 8063 if (atomic_read(&clp->cl_count) > 1)
8064 nfs4_schedule_state_renewal(clp);
8065 nfs_put_client(clp);
d5f8d3fe 8066 kfree(calldata);
dc96aef9
AB		 8067}
8068
aa5190d0
TM		 8069static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
8070{
8071 switch(task->tk_status) {
8072 case -NFS4ERR_DELAY:
aa5190d0
TM		 8073 rpc_delay(task, NFS4_POLL_RETRY_MAX);
8074 return -EAGAIN;
8075 default:
0400a6b0 8076 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 8077 }
8078 return 0;
8079}
8080
dc96aef9 8081static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 8082{
d5f8d3fe
TM		 8083 struct nfs4_sequence_data *calldata = data;
8084 struct nfs_client *clp = calldata->clp;
fc01cea9 8085
14516c3a
TM		 8086 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
8087 return;
fc01cea9 8088
c6d01c6f 8089 trace_nfs4_sequence(clp, task->tk_status);
fc01cea9
AA		 8090 if (task->tk_status < 0) {
8091 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 8092 if (atomic_read(&clp->cl_count) == 1)
8093 goto out;
fc01cea9 8094
aa5190d0
TM		 8095 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
8096 rpc_restart_call_prepare(task);
fc01cea9
AA		 8097 return;
8098 }
8099 }
fc01cea9 8100 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 8101out:
fc01cea9
AA		 8102 dprintk("<-- %s\n", __func__);
8103}
8104
8105static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
8106{
d5f8d3fe
TM		 8107 struct nfs4_sequence_data *calldata = data;
8108 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 8109 struct nfs4_sequence_args *args;
8110 struct nfs4_sequence_res *res;
8111
fc01cea9
AA		 8112 args = task->tk_msg.rpc_argp;
8113 res = task->tk_msg.rpc_resp;
8114
7981c8a6 8115 nfs4_setup_sequence(clp, args, res, task);
fc01cea9
AA		 8116}
8117
8118static const struct rpc_call_ops nfs41_sequence_ops = {
8119 .rpc_call_done = nfs41_sequence_call_done,
8120 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 8121 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 8122};
8123
8fe72bac
TM		 8124static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
8125 struct rpc_cred *cred,
8126 bool is_privileged)
fc01cea9 8127{
d5f8d3fe 8128 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 8129 struct rpc_message msg = {
8130 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
8131 .rpc_cred = cred,
8132 };
71ac6da9
TM		 8133 struct rpc_task_setup task_setup_data = {
8134 .rpc_client = clp->cl_rpcclient,
8135 .rpc_message = &msg,
8fe72bac 8136 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 8137 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 8138 };
fc01cea9 8139
7135840f 8140 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 8141 return ERR_PTR(-EIO);
dfb4f309 8142 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 8143 if (calldata == NULL) {
7135840f 8144 nfs_put_client(clp);
71ac6da9 8145 return ERR_PTR(-ENOMEM);
fc01cea9 8146 }
a9c92d6b 8147 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 8148 if (is_privileged)
8149 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 8150 msg.rpc_argp = &calldata->args;
8151 msg.rpc_resp = &calldata->res;
8152 calldata->clp = clp;
71ac6da9 8153 task_setup_data.callback_data = calldata;
fc01cea9 8154
71ac6da9
TM		 8155 return rpc_run_task(&task_setup_data);
8156}
8157
2f60ea6b 8158static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 8159{
8160 struct rpc_task *task;
8161 int ret = 0;
8162
2f60ea6b 8163 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
d1f456b0 8164 return -EAGAIN;
8fe72bac 8165 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 8166 if (IS_ERR(task))
8167 ret = PTR_ERR(task);
8168 else
bf294b41 8169 rpc_put_task_async(task);
71ac6da9
TM		 8170 dprintk("<-- %s status=%d\n", __func__, ret);
8171 return ret;
8172}
8173
8174static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
8175{
8176 struct rpc_task *task;
8177 int ret;
8178
8fe72bac 8179 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 8180 if (IS_ERR(task)) {
8181 ret = PTR_ERR(task);
8182 goto out;
8183 }
8184 ret = rpc_wait_for_completion_task(task);
be824167 8185 if (!ret)
71ac6da9
TM		 8186 ret = task->tk_status;
8187 rpc_put_task(task);
8188out:
8189 dprintk("<-- %s status=%d\n", __func__, ret);
8190 return ret;
fc01cea9
AA		 8191}
8192
fce5c838
RL		 8193struct nfs4_reclaim_complete_data {
8194 struct nfs_client *clp;
8195 struct nfs41_reclaim_complete_args arg;
8196 struct nfs41_reclaim_complete_res res;
8197};
8198
8199static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
8200{
8201 struct nfs4_reclaim_complete_data *calldata = data;
8202
7981c8a6 8203 nfs4_setup_sequence(calldata->clp,
d9afbd1b
TM		 8204 &calldata->arg.seq_args,
8205 &calldata->res.seq_res,
8206 task);
fce5c838
RL		 8207}
8208
aa5190d0
TM		 8209static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
8210{
8211 switch(task->tk_status) {
8212 case 0:
8213 case -NFS4ERR_COMPLETE_ALREADY:
8214 case -NFS4ERR_WRONG_CRED: /* What to do here? */
8215 break;
8216 case -NFS4ERR_DELAY:
aa5190d0 8217 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 8218 /* fall through */
8219 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0 8220 return -EAGAIN;
0048fdd0
TM		 8221 case -NFS4ERR_BADSESSION:
8222 case -NFS4ERR_DEADSESSION:
8223 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
8224 nfs4_schedule_session_recovery(clp->cl_session,
8225 task->tk_status);
8226 break;
aa5190d0 8227 default:
0400a6b0 8228 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 8229 }
8230 return 0;
8231}
8232
fce5c838
RL		 8233static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
8234{
8235 struct nfs4_reclaim_complete_data *calldata = data;
8236 struct nfs_client *clp = calldata->clp;
8237 struct nfs4_sequence_res *res = &calldata->res.seq_res;
8238
8239 dprintk("--> %s\n", __func__);
14516c3a
TM		 8240 if (!nfs41_sequence_done(task, res))
8241 return;
fce5c838 8242
c6d01c6f 8243 trace_nfs4_reclaim_complete(clp, task->tk_status);
aa5190d0
TM		 8244 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
8245 rpc_restart_call_prepare(task);
8246 return;
8247 }
fce5c838
RL		 8248 dprintk("<-- %s\n", __func__);
8249}
8250
8251static void nfs4_free_reclaim_complete_data(void *data)
8252{
8253 struct nfs4_reclaim_complete_data *calldata = data;
8254
8255 kfree(calldata);
8256}
8257
8258static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
8259 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
8260 .rpc_call_done = nfs4_reclaim_complete_done,
8261 .rpc_release = nfs4_free_reclaim_complete_data,
8262};
8263
8264/*
8265 * Issue a global reclaim complete.
8266 */
965e9c23
TM		 8267static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
8268 struct rpc_cred *cred)
fce5c838
RL		 8269{
8270 struct nfs4_reclaim_complete_data *calldata;
8271 struct rpc_task *task;
8272 struct rpc_message msg = {
8273 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 8274 .rpc_cred = cred,
fce5c838
RL		 8275 };
8276 struct rpc_task_setup task_setup_data = {
8277 .rpc_client = clp->cl_rpcclient,
8278 .rpc_message = &msg,
8279 .callback_ops = &nfs4_reclaim_complete_call_ops,
8280 .flags = RPC_TASK_ASYNC,
8281 };
8282 int status = -ENOMEM;
8283
8284 dprintk("--> %s\n", __func__);
8535b2be 8285 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 8286 if (calldata == NULL)
8287 goto out;
8288 calldata->clp = clp;
8289 calldata->arg.one_fs = 0;
fce5c838 8290
a9c92d6b 8291 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 8292 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 8293 msg.rpc_argp = &calldata->arg;
8294 msg.rpc_resp = &calldata->res;
8295 task_setup_data.callback_data = calldata;
8296 task = rpc_run_task(&task_setup_data);
acf82b85 8297 if (IS_ERR(task)) {
fce5c838 8298 status = PTR_ERR(task);
acf82b85
DC		 8299 goto out;
8300 }
820bf85c 8301 status = rpc_wait_for_completion_task(task);
c34c32ea
AA		 8302 if (status == 0)
8303 status = task->tk_status;
fce5c838
RL		 8304 rpc_put_task(task);
8305out:
8306 dprintk("<-- %s status=%d\n", __func__, status);
8307 return status;
8308}
b1f69b75
AA		 8309
8310static void
8311nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
8312{
8313 struct nfs4_layoutget *lgp = calldata;
c31663d4 8314 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
b1f69b75
AA		 8315
8316 dprintk("--> %s\n", __func__);
7981c8a6 8317 nfs4_setup_sequence(server->nfs_client, &lgp->args.seq_args,
183d9e7b
JL		 8318 &lgp->res.seq_res, task);
8319 dprintk("<-- %s\n", __func__);
b1f69b75
AA		 8320}
8321
8322static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
8323{
8324 struct nfs4_layoutget *lgp = calldata;
183d9e7b
JL		 8325
8326 dprintk("--> %s\n", __func__);
2e80dbe7 8327 nfs41_sequence_process(task, &lgp->res.seq_res);
183d9e7b
JL		 8328 dprintk("<-- %s\n", __func__);
8329}
8330
8331static int
8332nfs4_layoutget_handle_exception(struct rpc_task *task,
8333 struct nfs4_layoutget *lgp, struct nfs4_exception *exception)
8334{
ee314c2a
TM		 8335 struct inode *inode = lgp->args.inode;
8336 struct nfs_server *server = NFS_SERVER(inode);
8337 struct pnfs_layout_hdr *lo;
e85d7ee4
TM		 8338 int nfs4err = task->tk_status;
8339 int err, status = 0;
f7db0b28 8340 LIST_HEAD(head);
b1f69b75 8341
ed7e5423 8342 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
b1f69b75 8343
e85d7ee4 8344 switch (nfs4err) {
b1f69b75 8345 case 0:
ee314c2a 8346 goto out;
7c1e6e58
PT		 8347
8348 /*
8349 * NFS4ERR_LAYOUTUNAVAILABLE means we are not supposed to use pnfs
8350 * on the file. set tk_status to -ENODATA to tell upper layer to
8351 * retry go inband.
8352 */
8353 case -NFS4ERR_LAYOUTUNAVAILABLE:
183d9e7b 8354 status = -ENODATA;
7c1e6e58 8355 goto out;
21b874c8
TM		 8356 /*
8357 * NFS4ERR_BADLAYOUT means the MDS cannot return a layout of
8358 * length lgp->args.minlength != 0 (see RFC5661 section 18.43.3).
8359 */
8360 case -NFS4ERR_BADLAYOUT:
183d9e7b
JL		 8361 status = -EOVERFLOW;
8362 goto out;
ed7e5423
BH		 8363 /*
8364 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
21b874c8
TM		 8365 * (or clients) writing to the same RAID stripe except when
8366 * the minlength argument is 0 (see RFC5661 section 18.43.3).
183d9e7b
JL		 8367 *
8368 * Treat it like we would RECALLCONFLICT -- we retry for a little
8369 * while, and then eventually give up.
ed7e5423 8370 */
b1f69b75 8371 case -NFS4ERR_LAYOUTTRYLATER:
183d9e7b
JL		 8372 if (lgp->args.minlength == 0) {
8373 status = -EOVERFLOW;
8374 goto out;
ed7e5423 8375 }
e85d7ee4
TM		 8376 status = -EBUSY;
8377 break;
183d9e7b 8378 case -NFS4ERR_RECALLCONFLICT:
183d9e7b 8379 status = -ERECALLCONFLICT;
e85d7ee4 8380 break;
26f47443
TM		 8381 case -NFS4ERR_DELEG_REVOKED:
8382 case -NFS4ERR_ADMIN_REVOKED:
ee314c2a
TM		 8383 case -NFS4ERR_EXPIRED:
8384 case -NFS4ERR_BAD_STATEID:
183d9e7b 8385 exception->timeout = 0;
ee314c2a 8386 spin_lock(&inode->i_lock);
f7db0b28
TM		 8387 lo = NFS_I(inode)->layout;
8388 /* If the open stateid was bad, then recover it. */
8389 if (!lo || test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) ||
8390 nfs4_stateid_match_other(&lgp->args.stateid,
2259f960 8391 &lgp->args.ctx->state->stateid)) {
ee314c2a 8392 spin_unlock(&inode->i_lock);
183d9e7b 8393 exception->state = lgp->args.ctx->state;
26f47443 8394 exception->stateid = &lgp->args.stateid;
2259f960
TM		 8395 break;
8396 }
f7db0b28
TM		 8397
8398 /*
8399 * Mark the bad layout state as invalid, then retry
8400 */
668f455d 8401 pnfs_mark_layout_stateid_invalid(lo, &head);
f7db0b28 8402 spin_unlock(&inode->i_lock);
1f18b82c 8403 nfs_commit_inode(inode, 0);
f7db0b28
TM		 8404 pnfs_free_lseg_list(&head);
8405 status = -EAGAIN;
8406 goto out;
b1f69b75 8407 }
183d9e7b 8408
8ac09251 8409 nfs4_sequence_free_slot(&lgp->res.seq_res);
e85d7ee4
TM		 8410 err = nfs4_handle_exception(server, nfs4err, exception);
8411 if (!status) {
8412 if (exception->retry)
8413 status = -EAGAIN;
8414 else
8415 status = err;
8416 }
ee314c2a 8417out:
b1f69b75 8418 dprintk("<-- %s\n", __func__);
183d9e7b 8419 return status;
b1f69b75
AA		 8420}
8421
8554116e
IK		 8422static size_t max_response_pages(struct nfs_server *server)
8423{
8424 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
8425 return nfs_page_array_len(0, max_resp_sz);
8426}
8427
8428static void nfs4_free_pages(struct page **pages, size_t size)
8429{
8430 int i;
8431
8432 if (!pages)
8433 return;
8434
8435 for (i = 0; i < size; i++) {
8436 if (!pages[i])
8437 break;
8438 __free_page(pages[i]);
8439 }
8440 kfree(pages);
8441}
8442
8443static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
8444{
8445 struct page **pages;
8446 int i;
8447
8448 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
8449 if (!pages) {
8450 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
8451 return NULL;
8452 }
8453
8454 for (i = 0; i < size; i++) {
8455 pages[i] = alloc_page(gfp_flags);
8456 if (!pages[i]) {
8457 dprintk("%s: failed to allocate page\n", __func__);
8458 nfs4_free_pages(pages, size);
8459 return NULL;
8460 }
8461 }
8462
8463 return pages;
8464}
8465
b1f69b75
AA		 8466static void nfs4_layoutget_release(void *calldata)
8467{
8468 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 8469 struct inode *inode = lgp->args.inode;
8470 struct nfs_server *server = NFS_SERVER(inode);
8554116e 8471 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 8472
8473 dprintk("--> %s\n", __func__);
bd171930 8474 nfs4_sequence_free_slot(&lgp->res.seq_res);
8554116e 8475 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 8476 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 8477 put_nfs_open_context(lgp->args.ctx);
8478 kfree(calldata);
8479 dprintk("<-- %s\n", __func__);
8480}
8481
8482static const struct rpc_call_ops nfs4_layoutget_call_ops = {
8483 .rpc_call_prepare = nfs4_layoutget_prepare,
8484 .rpc_call_done = nfs4_layoutget_done,
8485 .rpc_release = nfs4_layoutget_release,
8486};
8487
a0b0a6e3 8488struct pnfs_layout_segment *
183d9e7b 8489nfs4_proc_layoutget(struct nfs4_layoutget *lgp, long *timeout, gfp_t gfp_flags)
b1f69b75 8490{
a47970ff
WAA		 8491 struct inode *inode = lgp->args.inode;
8492 struct nfs_server *server = NFS_SERVER(inode);
8554116e 8493 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 8494 struct rpc_task *task;
8495 struct rpc_message msg = {
8496 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
8497 .rpc_argp = &lgp->args,
8498 .rpc_resp = &lgp->res,
6ab59344 8499 .rpc_cred = lgp->cred,
b1f69b75
AA		 8500 };
8501 struct rpc_task_setup task_setup_data = {
8502 .rpc_client = server->client,
8503 .rpc_message = &msg,
8504 .callback_ops = &nfs4_layoutget_call_ops,
8505 .callback_data = lgp,
8506 .flags = RPC_TASK_ASYNC,
8507 };
a0b0a6e3 8508 struct pnfs_layout_segment *lseg = NULL;
bc23676c
TM		 8509 struct nfs4_exception exception = {
8510 .inode = inode,
8511 .timeout = *timeout,
8512 };
b1f69b75
AA		 8513 int status = 0;
8514
8515 dprintk("--> %s\n", __func__);
8516
4bd5a980
PT		 8517 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
8518 pnfs_get_layout_hdr(NFS_I(inode)->layout);
8519
8554116e
IK		 8520 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
8521 if (!lgp->args.layout.pages) {
8522 nfs4_layoutget_release(lgp);
a0b0a6e3 8523 return ERR_PTR(-ENOMEM);
8554116e
IK		 8524 }
8525 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
8526
35124a09 8527 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 8528 lgp->res.seq_res.sr_slot = NULL;
a9c92d6b 8529 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff 8530
b1f69b75
AA		 8531 task = rpc_run_task(&task_setup_data);
8532 if (IS_ERR(task))
a0b0a6e3 8533 return ERR_CAST(task);
820bf85c 8534 status = rpc_wait_for_completion_task(task);
183d9e7b
JL		 8535 if (status == 0) {
8536 status = nfs4_layoutget_handle_exception(task, lgp, &exception);
8537 *timeout = exception.timeout;
8538 }
8539
1037e6ea
TM		 8540 trace_nfs4_layoutget(lgp->args.ctx,
8541 &lgp->args.range,
8542 &lgp->res.range,
48c9579a 8543 &lgp->res.stateid,
1037e6ea 8544 status);
183d9e7b 8545
085b7a45
WAA		 8546 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
8547 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 8548 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 8549 rpc_put_task(task);
8550 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 8551 if (status)
8552 return ERR_PTR(status);
8553 return lseg;
b1f69b75
AA		 8554}
8555
cbe82603
BH		 8556static void
8557nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
8558{
8559 struct nfs4_layoutreturn *lrp = calldata;
8560
8561 dprintk("--> %s\n", __func__);
7981c8a6 8562 nfs4_setup_sequence(lrp->clp,
d9afbd1b
TM		 8563 &lrp->args.seq_args,
8564 &lrp->res.seq_res,
8565 task);
cbe82603
BH		 8566}
8567
8568static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
8569{
8570 struct nfs4_layoutreturn *lrp = calldata;
8571 struct nfs_server *server;
8572
8573 dprintk("--> %s\n", __func__);
8574
2e80dbe7 8575 if (!nfs41_sequence_process(task, &lrp->res.seq_res))
cbe82603
BH		 8576 return;
8577
8578 server = NFS_SERVER(lrp->args.inode);
f22e5edd
TM		 8579 switch (task->tk_status) {
8580 default:
8581 task->tk_status = 0;
8582 case 0:
8583 break;
8584 case -NFS4ERR_DELAY:
8478eaa1 8585 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
f22e5edd 8586 break;
2e80dbe7 8587 nfs4_sequence_free_slot(&lrp->res.seq_res);
d00c5d43 8588 rpc_restart_call_prepare(task);
cbe82603
BH		 8589 return;
8590 }
cbe82603
BH		 8591 dprintk("<-- %s\n", __func__);
8592}
8593
8594static void nfs4_layoutreturn_release(void *calldata)
8595{
8596 struct nfs4_layoutreturn *lrp = calldata;
849b286f 8597 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 8598
8599 dprintk("--> %s\n", __func__);
2a974425 8600 pnfs_layoutreturn_free_lsegs(lo, &lrp->args.stateid, &lrp->args.range,
68f74479 8601 lrp->res.lrs_present ? &lrp->res.stateid : NULL);
2e80dbe7 8602 nfs4_sequence_free_slot(&lrp->res.seq_res);
4d796d75
TM		 8603 if (lrp->ld_private.ops && lrp->ld_private.ops->free)
8604 lrp->ld_private.ops->free(&lrp->ld_private);
2f065ddb
TM		 8605 pnfs_put_layout_hdr(lrp->args.layout);
8606 nfs_iput_and_deactive(lrp->inode);
cbe82603
BH		 8607 kfree(calldata);
8608 dprintk("<-- %s\n", __func__);
8609}
8610
8611static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
8612 .rpc_call_prepare = nfs4_layoutreturn_prepare,
8613 .rpc_call_done = nfs4_layoutreturn_done,
8614 .rpc_release = nfs4_layoutreturn_release,
8615};
8616
6c16605d 8617int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync)
cbe82603
BH		 8618{
8619 struct rpc_task *task;
8620 struct rpc_message msg = {
8621 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
8622 .rpc_argp = &lrp->args,
8623 .rpc_resp = &lrp->res,
9556000d 8624 .rpc_cred = lrp->cred,
cbe82603
BH		 8625 };
8626 struct rpc_task_setup task_setup_data = {
1771c577 8627 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
cbe82603
BH		 8628 .rpc_message = &msg,
8629 .callback_ops = &nfs4_layoutreturn_call_ops,
8630 .callback_data = lrp,
8631 };
6c16605d 8632 int status = 0;
cbe82603 8633
99ade3c7
AE		 8634 nfs4_state_protect(NFS_SERVER(lrp->args.inode)->nfs_client,
8635 NFS_SP4_MACH_CRED_PNFS_CLEANUP,
8636 &task_setup_data.rpc_client, &msg);
8637
cbe82603 8638 dprintk("--> %s\n", __func__);
5a0ec8ac
TM		 8639 if (!sync) {
8640 lrp->inode = nfs_igrab_and_active(lrp->args.inode);
8641 if (!lrp->inode) {
8642 nfs4_layoutreturn_release(lrp);
8643 return -EAGAIN;
8644 }
8645 task_setup_data.flags |= RPC_TASK_ASYNC;
8646 }
a9c92d6b 8647 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 8648 task = rpc_run_task(&task_setup_data);
8649 if (IS_ERR(task))
8650 return PTR_ERR(task);
5a0ec8ac
TM		 8651 if (sync)
8652 status = task->tk_status;
48c9579a 8653 trace_nfs4_layoutreturn(lrp->args.inode, &lrp->args.stateid, status);
cbe82603
BH		 8654 dprintk("<-- %s status=%d\n", __func__, status);
8655 rpc_put_task(task);
8656 return status;
8657}
8658
b1f69b75 8659static int
cd5875fe
TM		 8660_nfs4_proc_getdeviceinfo(struct nfs_server *server,
8661 struct pnfs_device *pdev,
8662 struct rpc_cred *cred)
b1f69b75
AA		 8663{
8664 struct nfs4_getdeviceinfo_args args = {
8665 .pdev = pdev,
4e590803
TM		 8666 .notify_types = NOTIFY_DEVICEID4_CHANGE |
8667 NOTIFY_DEVICEID4_DELETE,
b1f69b75
AA		 8668 };
8669 struct nfs4_getdeviceinfo_res res = {
8670 .pdev = pdev,
8671 };
8672 struct rpc_message msg = {
8673 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
8674 .rpc_argp = &args,
8675 .rpc_resp = &res,
cd5875fe 8676 .rpc_cred = cred,
b1f69b75
AA		 8677 };
8678 int status;
8679
8680 dprintk("--> %s\n", __func__);
7c513058 8681 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4e590803
TM		 8682 if (res.notification & ~args.notify_types)
8683 dprintk("%s: unsupported notification\n", __func__);
df52699e
TM		 8684 if (res.notification != args.notify_types)
8685 pdev->nocache = 1;
4e590803 8686
b1f69b75
AA		 8687 dprintk("<-- %s status=%d\n", __func__, status);
8688
8689 return status;
8690}
8691
cd5875fe
TM		 8692int nfs4_proc_getdeviceinfo(struct nfs_server *server,
8693 struct pnfs_device *pdev,
8694 struct rpc_cred *cred)
b1f69b75
AA		 8695{
8696 struct nfs4_exception exception = { };
8697 int err;
8698
8699 do {
8700 err = nfs4_handle_exception(server,
cd5875fe 8701 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 8702 &exception);
8703 } while (exception.retry);
8704 return err;
8705}
8706EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
8707
863a3c6c
AA		 8708static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
8709{
8710 struct nfs4_layoutcommit_data *data = calldata;
8711 struct nfs_server *server = NFS_SERVER(data->args.inode);
8712
7981c8a6 8713 nfs4_setup_sequence(server->nfs_client,
d9afbd1b
TM		 8714 &data->args.seq_args,
8715 &data->res.seq_res,
8716 task);
863a3c6c
AA		 8717}
8718
8719static void
8720nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
8721{
8722 struct nfs4_layoutcommit_data *data = calldata;
8723 struct nfs_server *server = NFS_SERVER(data->args.inode);
8724
6ba7db34 8725 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 8726 return;
8727
8728 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 8729 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
8730 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
8731 case -NFS4ERR_BADLAYOUT: /* no layout */
8732 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 8733 task->tk_status = 0;
e59d27e0 8734 case 0:
e59d27e0
TM		 8735 break;
8736 default:
8478eaa1 8737 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) {
e59d27e0
TM		 8738 rpc_restart_call_prepare(task);
8739 return;
8740 }
8741 }
863a3c6c
AA		 8742}
8743
8744static void nfs4_layoutcommit_release(void *calldata)
8745{
8746 struct nfs4_layoutcommit_data *data = calldata;
8747
db29c089 8748 pnfs_cleanup_layoutcommit(data);
d8c951c3
TM		 8749 nfs_post_op_update_inode_force_wcc(data->args.inode,
8750 data->res.fattr);
863a3c6c 8751 put_rpccred(data->cred);
472e2594 8752 nfs_iput_and_deactive(data->inode);
863a3c6c
AA		 8753 kfree(data);
8754}
8755
8756static const struct rpc_call_ops nfs4_layoutcommit_ops = {
8757 .rpc_call_prepare = nfs4_layoutcommit_prepare,
8758 .rpc_call_done = nfs4_layoutcommit_done,
8759 .rpc_release = nfs4_layoutcommit_release,
8760};
8761
8762int
ef311537 8763nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 8764{
8765 struct rpc_message msg = {
8766 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
8767 .rpc_argp = &data->args,
8768 .rpc_resp = &data->res,
8769 .rpc_cred = data->cred,
8770 };
8771 struct rpc_task_setup task_setup_data = {
8772 .task = &data->task,
8773 .rpc_client = NFS_CLIENT(data->args.inode),
8774 .rpc_message = &msg,
8775 .callback_ops = &nfs4_layoutcommit_ops,
8776 .callback_data = data,
863a3c6c
AA		 8777 };
8778 struct rpc_task *task;
8779 int status = 0;
8780
b4839ebe
KM		 8781 dprintk("NFS: initiating layoutcommit call. sync %d "
8782 "lbw: %llu inode %lu\n", sync,
863a3c6c
AA		 8783 data->args.lastbytewritten,
8784 data->args.inode->i_ino);
8785
472e2594
TM		 8786 if (!sync) {
8787 data->inode = nfs_igrab_and_active(data->args.inode);
8788 if (data->inode == NULL) {
8789 nfs4_layoutcommit_release(data);
8790 return -EAGAIN;
8791 }
8792 task_setup_data.flags = RPC_TASK_ASYNC;
8793 }
a9c92d6b 8794 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 8795 task = rpc_run_task(&task_setup_data);
8796 if (IS_ERR(task))
8797 return PTR_ERR(task);
472e2594
TM		 8798 if (sync)
8799 status = task->tk_status;
48c9579a 8800 trace_nfs4_layoutcommit(data->args.inode, &data->args.stateid, status);
863a3c6c
AA		 8801 dprintk("%s: status %d\n", __func__, status);
8802 rpc_put_task(task);
8803 return status;
8804}
fca78d6d 8805
97431204
AA		 8806/**
8807 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
8808 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
8809 */
fca78d6d
BS		 8810static int
8811_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
b1b3e136
WAA		 8812 struct nfs_fsinfo *info,
8813 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
fca78d6d
BS		 8814{
8815 struct nfs41_secinfo_no_name_args args = {
8816 .style = SECINFO_STYLE_CURRENT_FH,
8817 };
8818 struct nfs4_secinfo_res res = {
8819 .flavors = flavors,
8820 };
8821 struct rpc_message msg = {
8822 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
8823 .rpc_argp = &args,
8824 .rpc_resp = &res,
8825 };
b1b3e136 8826 struct rpc_clnt *clnt = server->client;
7cb852df 8827 struct rpc_cred *cred = NULL;
b1b3e136
WAA		 8828 int status;
8829
8830 if (use_integrity) {
8831 clnt = server->nfs_client->cl_rpcclient;
7cb852df
WAA		 8832 cred = nfs4_get_clid_cred(server->nfs_client);
8833 msg.rpc_cred = cred;
b1b3e136
WAA		 8834 }
8835
8836 dprintk("--> %s\n", __func__);
8837 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
8838 &res.seq_res, 0);
8839 dprintk("<-- %s status=%d\n", __func__, status);
8840
7cb852df
WAA		 8841 if (cred)
8842 put_rpccred(cred);
b1b3e136
WAA		 8843
8844 return status;
fca78d6d
BS		 8845}
8846
8847static int
8848nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8849 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
8850{
8851 struct nfs4_exception exception = { };
8852 int err;
8853 do {
b1b3e136
WAA		 8854 /* first try using integrity protection */
8855 err = -NFS4ERR_WRONGSEC;
8856
8857 /* try to use integrity protection with machine cred */
8858 if (_nfs4_is_integrity_protected(server->nfs_client))
8859 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8860 flavors, true);
8861
8862 /*
8863 * if unable to use integrity protection, or SECINFO with
8864 * integrity protection returns NFS4ERR_WRONGSEC (which is
8865 * disallowed by spec, but exists in deployed servers) use
8866 * the current filesystem's rpc_client and the user cred.
8867 */
8868 if (err == -NFS4ERR_WRONGSEC)
8869 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8870 flavors, false);
8871
fca78d6d
BS		 8872 switch (err) {
8873 case 0:
8874 case -NFS4ERR_WRONGSEC:
78b19bae 8875 case -ENOTSUPP:
05e9cfb4 8876 goto out;
fca78d6d
BS		 8877 default:
8878 err = nfs4_handle_exception(server, err, &exception);
8879 }
8880 } while (exception.retry);
05e9cfb4 8881out:
fca78d6d
BS		 8882 return err;
8883}
8884
8885static int
8886nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
8887 struct nfs_fsinfo *info)
8888{
8889 int err;
8890 struct page *page;
367156d9 8891 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
fca78d6d 8892 struct nfs4_secinfo_flavors *flavors;
58a8cf12
WAA		 8893 struct nfs4_secinfo4 *secinfo;
8894 int i;
fca78d6d
BS		 8895
8896 page = alloc_page(GFP_KERNEL);
8897 if (!page) {
8898 err = -ENOMEM;
8899 goto out;
8900 }
8901
8902 flavors = page_address(page);
8903 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
8904
8905 /*
8906 * Fall back on "guess and check" method if
8907 * the server doesn't support SECINFO_NO_NAME
8908 */
78b19bae 8909 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
fca78d6d
BS		 8910 err = nfs4_find_root_sec(server, fhandle, info);
8911 goto out_freepage;
8912 }
8913 if (err)
8914 goto out_freepage;
8915
58a8cf12
WAA		 8916 for (i = 0; i < flavors->num_flavors; i++) {
8917 secinfo = &flavors->flavors[i];
8918
8919 switch (secinfo->flavor) {
8920 case RPC_AUTH_NULL:
8921 case RPC_AUTH_UNIX:
8922 case RPC_AUTH_GSS:
8923 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
8924 &secinfo->flavor_info);
8925 break;
8926 default:
8927 flavor = RPC_AUTH_MAXFLAVOR;
8928 break;
8929 }
8930
4d4b69dd
WAA		 8931 if (!nfs_auth_info_match(&server->auth_info, flavor))
8932 flavor = RPC_AUTH_MAXFLAVOR;
8933
58a8cf12
WAA		 8934 if (flavor != RPC_AUTH_MAXFLAVOR) {
8935 err = nfs4_lookup_root_sec(server, fhandle,
8936 info, flavor);
8937 if (!err)
8938 break;
8939 }
8940 }
8941
8942 if (flavor == RPC_AUTH_MAXFLAVOR)
8943 err = -EPERM;
fca78d6d
BS		 8944
8945out_freepage:
8946 put_page(page);
8947 if (err == -EACCES)
8948 return -EPERM;
8949out:
8950 return err;
8951}
1cab0652 8952
ab7cb0df
TM		 8953static int _nfs41_test_stateid(struct nfs_server *server,
8954 nfs4_stateid *stateid,
8955 struct rpc_cred *cred)
7d974794
BS		 8956{
8957 int status;
8958 struct nfs41_test_stateid_args args = {
1cab0652 8959 .stateid = stateid,
7d974794
BS		 8960 };
8961 struct nfs41_test_stateid_res res;
8962 struct rpc_message msg = {
8963 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
8964 .rpc_argp = &args,
8965 .rpc_resp = &res,
ab7cb0df 8966 .rpc_cred = cred,
7d974794 8967 };
3787d506
WAA		 8968 struct rpc_clnt *rpc_client = server->client;
8969
8970 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8971 &rpc_client, &msg);
1cab0652 8972
38527b15 8973 dprintk("NFS call test_stateid %p\n", stateid);
a9c92d6b 8974 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 8975 nfs4_set_sequence_privileged(&args.seq_args);
3787d506 8976 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8fe72bac 8977 &args.seq_args, &res.seq_res);
38527b15
CL		 8978 if (status != NFS_OK) {
8979 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 8980 return status;
38527b15
CL		 8981 }
8982 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 8983 return -res.status;
7d974794
BS		 8984}
8985
43912bbb
TM		 8986static void nfs4_handle_delay_or_session_error(struct nfs_server *server,
8987 int err, struct nfs4_exception *exception)
8988{
8989 exception->retry = 0;
8990 switch(err) {
8991 case -NFS4ERR_DELAY:
76e8a1bd 8992 case -NFS4ERR_RETRY_UNCACHED_REP:
43912bbb
TM		 8993 nfs4_handle_exception(server, err, exception);
8994 break;
8995 case -NFS4ERR_BADSESSION:
8996 case -NFS4ERR_BADSLOT:
8997 case -NFS4ERR_BAD_HIGH_SLOT:
8998 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
8999 case -NFS4ERR_DEADSESSION:
9000 nfs4_do_handle_exception(server, err, exception);
9001 }
9002}
9003
38527b15
CL		 9004/**
9005 * nfs41_test_stateid - perform a TEST_STATEID operation
9006 *
9007 * @server: server / transport on which to perform the operation
9008 * @stateid: state ID to test
ab7cb0df 9009 * @cred: credential
38527b15
CL		 9010 *
9011 * Returns NFS_OK if the server recognizes that "stateid" is valid.
9012 * Otherwise a negative NFS4ERR value is returned if the operation
9013 * failed or the state ID is not currently valid.
9014 */
ab7cb0df
TM		 9015static int nfs41_test_stateid(struct nfs_server *server,
9016 nfs4_stateid *stateid,
9017 struct rpc_cred *cred)
7d974794
BS		 9018{
9019 struct nfs4_exception exception = { };
9020 int err;
9021 do {
ab7cb0df 9022 err = _nfs41_test_stateid(server, stateid, cred);
43912bbb 9023 nfs4_handle_delay_or_session_error(server, err, &exception);
7d974794
BS		 9024 } while (exception.retry);
9025 return err;
9026}
9aeda35f 9027
7c1d5fae
TM		 9028struct nfs_free_stateid_data {
9029 struct nfs_server *server;
9030 struct nfs41_free_stateid_args args;
9aeda35f 9031 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 9032};
9033
9034static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
9035{
9036 struct nfs_free_stateid_data *data = calldata;
7981c8a6 9037 nfs4_setup_sequence(data->server->nfs_client,
7c1d5fae
TM		 9038 &data->args.seq_args,
9039 &data->res.seq_res,
9040 task);
9041}
9042
9043static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
9044{
9045 struct nfs_free_stateid_data *data = calldata;
9046
9047 nfs41_sequence_done(task, &data->res.seq_res);
9048
9049 switch (task->tk_status) {
9050 case -NFS4ERR_DELAY:
8478eaa1 9051 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN)
7c1d5fae
TM		 9052 rpc_restart_call_prepare(task);
9053 }
9054}
9055
9056static void nfs41_free_stateid_release(void *calldata)
9057{
9058 kfree(calldata);
9059}
9060
17f26b12 9061static const struct rpc_call_ops nfs41_free_stateid_ops = {
7c1d5fae
TM		 9062 .rpc_call_prepare = nfs41_free_stateid_prepare,
9063 .rpc_call_done = nfs41_free_stateid_done,
9064 .rpc_release = nfs41_free_stateid_release,
9065};
9066
9067static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
f0b0bf88 9068 const nfs4_stateid *stateid,
ab7cb0df 9069 struct rpc_cred *cred,
7c1d5fae
TM		 9070 bool privileged)
9071{
9aeda35f
BS		 9072 struct rpc_message msg = {
9073 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 9074 .rpc_cred = cred,
9aeda35f 9075 };
7c1d5fae
TM		 9076 struct rpc_task_setup task_setup = {
9077 .rpc_client = server->client,
9078 .rpc_message = &msg,
9079 .callback_ops = &nfs41_free_stateid_ops,
9080 .flags = RPC_TASK_ASYNC,
9081 };
9082 struct nfs_free_stateid_data *data;
9aeda35f 9083
3787d506
WAA		 9084 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
9085 &task_setup.rpc_client, &msg);
9086
38527b15 9087 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 9088 data = kmalloc(sizeof(*data), GFP_NOFS);
9089 if (!data)
9090 return ERR_PTR(-ENOMEM);
9091 data->server = server;
9092 nfs4_stateid_copy(&data->args.stateid, stateid);
9093
9094 task_setup.callback_data = data;
9095
9096 msg.rpc_argp = &data->args;
9097 msg.rpc_resp = &data->res;
76e8a1bd 9098 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
7c1d5fae
TM		 9099 if (privileged)
9100 nfs4_set_sequence_privileged(&data->args.seq_args);
9101
9102 return rpc_run_task(&task_setup);
9aeda35f
BS		 9103}
9104
38527b15
CL		 9105/**
9106 * nfs41_free_stateid - perform a FREE_STATEID operation
9107 *
9108 * @server: server / transport on which to perform the operation
9109 * @stateid: state ID to release
ab7cb0df 9110 * @cred: credential
f0b0bf88 9111 * @is_recovery: set to true if this call needs to be privileged
38527b15 9112 *
f0b0bf88 9113 * Note: this function is always asynchronous.
38527b15 9114 */
ab7cb0df 9115static int nfs41_free_stateid(struct nfs_server *server,
f0b0bf88
TM		 9116 const nfs4_stateid *stateid,
9117 struct rpc_cred *cred,
9118 bool is_recovery)
9aeda35f 9119{
7c1d5fae 9120 struct rpc_task *task;
7c1d5fae 9121
f0b0bf88 9122 task = _nfs41_free_stateid(server, stateid, cred, is_recovery);
7c1d5fae
TM		 9123 if (IS_ERR(task))
9124 return PTR_ERR(task);
7c1d5fae 9125 rpc_put_task(task);
f0b0bf88 9126 return 0;
9aeda35f 9127}
36281caa 9128
f1cdae87
JL		 9129static void
9130nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
c8b2d0bf 9131{
ab7cb0df 9132 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 9133
f0b0bf88 9134 nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf 9135 nfs4_free_lock_state(server, lsp);
c8b2d0bf
TM		 9136}
9137
36281caa
TM		 9138static bool nfs41_match_stateid(const nfs4_stateid *s1,
9139 const nfs4_stateid *s2)
9140{
93b717fd
TM		 9141 if (s1->type != s2->type)
9142 return false;
9143
2d2f24ad 9144 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 9145 return false;
9146
2d2f24ad 9147 if (s1->seqid == s2->seqid)
36281caa 9148 return true;
36281caa 9149
045c5519 9150 return s1->seqid == 0 || s2->seqid == 0;
36281caa
TM		 9151}
9152
557134a3
AA		 9153#endif /* CONFIG_NFS_V4_1 */
9154
36281caa
TM		 9155static bool nfs4_match_stateid(const nfs4_stateid *s1,
9156 const nfs4_stateid *s2)
9157{
f597c537 9158 return nfs4_stateid_match(s1, s2);
36281caa
TM		 9159}
9160
9161
17280175 9162static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 9163 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 9164 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 9165 .recover_open = nfs4_open_reclaim,
9166 .recover_lock = nfs4_lock_reclaim,
591d71cb 9167 .establish_clid = nfs4_init_clientid,
05f4c350 9168 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 9169};
9170
591d71cb 9171#if defined(CONFIG_NFS_V4_1)
17280175 9172static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 9173 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
9174 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
9175 .recover_open = nfs4_open_reclaim,
9176 .recover_lock = nfs4_lock_reclaim,
4d643d1d 9177 .establish_clid = nfs41_init_clientid,
fce5c838 9178 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 9179 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 9180};
9181#endif /* CONFIG_NFS_V4_1 */
9182
17280175 9183static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 9184 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
9185 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
4dfd4f7a 9186 .recover_open = nfs40_open_expired,
591d71cb
AA		 9187 .recover_lock = nfs4_lock_expired,
9188 .establish_clid = nfs4_init_clientid,
9189};
9190
9191#if defined(CONFIG_NFS_V4_1)
17280175 9192static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 9193 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 9194 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 9195 .recover_open = nfs41_open_expired,
9196 .recover_lock = nfs41_lock_expired,
4d643d1d 9197 .establish_clid = nfs41_init_clientid,
1da177e4 9198};
591d71cb 9199#endif /* CONFIG_NFS_V4_1 */
1da177e4 9200
17280175 9201static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 9202 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 9203 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 9204 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 9205};
9206
9207#if defined(CONFIG_NFS_V4_1)
17280175 9208static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 9209 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 9210 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 9211 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 9212};
9213#endif
9214
ec011fe8 9215static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
b03d735b 9216 .get_locations = _nfs40_proc_get_locations,
44c99933 9217 .fsid_present = _nfs40_proc_fsid_present,
ec011fe8
CL		 9218};
9219
9220#if defined(CONFIG_NFS_V4_1)
9221static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
b03d735b 9222 .get_locations = _nfs41_proc_get_locations,
44c99933 9223 .fsid_present = _nfs41_proc_fsid_present,
ec011fe8
CL		 9224};
9225#endif /* CONFIG_NFS_V4_1 */
9226
97dc1359
TM		 9227static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
9228 .minor_version = 0,
39c6daae
TM		 9229 .init_caps = NFS_CAP_READDIRPLUS
9230 | NFS_CAP_ATOMIC_OPEN
39c6daae 9231 | NFS_CAP_POSIX_LOCK,
abf79bb3
CL		 9232 .init_client = nfs40_init_client,
9233 .shutdown_client = nfs40_shutdown_client,
36281caa 9234 .match_stateid = nfs4_match_stateid,
fca78d6d 9235 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 9236 .free_lock_state = nfs4_release_lockowner,
45870d69 9237 .test_and_free_expired = nfs40_test_and_free_expired_stateid,
63f5f796 9238 .alloc_seqid = nfs_alloc_seqid,
9915ea7e 9239 .call_sync_ops = &nfs40_call_sync_ops,
c48f4f35
TM		 9240 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
9241 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
9242 .state_renewal_ops = &nfs40_state_renewal_ops,
ec011fe8 9243 .mig_recovery_ops = &nfs40_mig_recovery_ops,
97dc1359
TM		 9244};
9245
9246#if defined(CONFIG_NFS_V4_1)
63f5f796
TM		 9247static struct nfs_seqid *
9248nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2)
9249{
9250 return NULL;
9251}
9252
97dc1359
TM		 9253static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
9254 .minor_version = 1,
39c6daae
TM		 9255 .init_caps = NFS_CAP_READDIRPLUS
9256 | NFS_CAP_ATOMIC_OPEN
3b66486c 9257 | NFS_CAP_POSIX_LOCK
49f9a0fa 9258 | NFS_CAP_STATEID_NFSV41
e983120e 9259 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 9260 .init_client = nfs41_init_client,
9261 .shutdown_client = nfs41_shutdown_client,
36281caa 9262 .match_stateid = nfs41_match_stateid,
fca78d6d 9263 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 9264 .free_lock_state = nfs41_free_lock_state,
45870d69 9265 .test_and_free_expired = nfs41_test_and_free_expired_stateid,
63f5f796 9266 .alloc_seqid = nfs_alloc_no_seqid,
04fa2c6b 9267 .session_trunk = nfs4_test_session_trunk,
9915ea7e 9268 .call_sync_ops = &nfs41_call_sync_ops,
c48f4f35
TM		 9269 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
9270 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
9271 .state_renewal_ops = &nfs41_state_renewal_ops,
ec011fe8 9272 .mig_recovery_ops = &nfs41_mig_recovery_ops,
97dc1359
TM		 9273};
9274#endif
9275
42c2c424
SD		 9276#if defined(CONFIG_NFS_V4_2)
9277static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
9278 .minor_version = 2,
7017310a
BS		 9279 .init_caps = NFS_CAP_READDIRPLUS
9280 | NFS_CAP_ATOMIC_OPEN
7017310a
BS		 9281 | NFS_CAP_POSIX_LOCK
9282 | NFS_CAP_STATEID_NFSV41
e983120e 9283 | NFS_CAP_ATOMIC_OPEN_V1
f4ac1674 9284 | NFS_CAP_ALLOCATE
2e72448b 9285 | NFS_CAP_COPY
624bd5b7 9286 | NFS_CAP_DEALLOCATE
6c5a0d89 9287 | NFS_CAP_SEEK
e5341f3a
PT		 9288 | NFS_CAP_LAYOUTSTATS
9289 | NFS_CAP_CLONE,
abf79bb3
CL		 9290 .init_client = nfs41_init_client,
9291 .shutdown_client = nfs41_shutdown_client,
42c2c424
SD		 9292 .match_stateid = nfs41_match_stateid,
9293 .find_root_sec = nfs41_find_root_sec,
7017310a 9294 .free_lock_state = nfs41_free_lock_state,
9915ea7e 9295 .call_sync_ops = &nfs41_call_sync_ops,
45870d69 9296 .test_and_free_expired = nfs41_test_and_free_expired_stateid,
63f5f796 9297 .alloc_seqid = nfs_alloc_no_seqid,
04fa2c6b 9298 .session_trunk = nfs4_test_session_trunk,
42c2c424
SD		 9299 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
9300 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
9301 .state_renewal_ops = &nfs41_state_renewal_ops,
18e3b739 9302 .mig_recovery_ops = &nfs41_mig_recovery_ops,
42c2c424
SD		 9303};
9304#endif
9305
97dc1359
TM		 9306const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
9307 [0] = &nfs_v4_0_minor_ops,
9308#if defined(CONFIG_NFS_V4_1)
9309 [1] = &nfs_v4_1_minor_ops,
9310#endif
42c2c424
SD		 9311#if defined(CONFIG_NFS_V4_2)
9312 [2] = &nfs_v4_2_minor_ops,
9313#endif
97dc1359
TM		 9314};
9315
13997823 9316static ssize_t nfs4_listxattr(struct dentry *dentry, char *list, size_t size)
c4803c49
AG		 9317{
9318 ssize_t error, error2;
9319
9320 error = generic_listxattr(dentry, list, size);
9321 if (error < 0)
9322 return error;
9323 if (list) {
9324 list += error;
9325 size -= error;
9326 }
9327
9328 error2 = nfs4_listxattr_nfs4_label(d_inode(dentry), list, size);
9329 if (error2 < 0)
9330 return error2;
9331 return error + error2;
9332}
9333
17f26b12 9334static const struct inode_operations nfs4_dir_inode_operations = {
73a79706
BS		 9335 .create = nfs_create,
9336 .lookup = nfs_lookup,
9337 .atomic_open = nfs_atomic_open,
9338 .link = nfs_link,
9339 .unlink = nfs_unlink,
9340 .symlink = nfs_symlink,
9341 .mkdir = nfs_mkdir,
9342 .rmdir = nfs_rmdir,
9343 .mknod = nfs_mknod,
9344 .rename = nfs_rename,
9345 .permission = nfs_permission,
9346 .getattr = nfs_getattr,
9347 .setattr = nfs_setattr,
c4803c49 9348 .listxattr = nfs4_listxattr,
73a79706
BS		 9349};
9350
92e1d5be 9351static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 9352 .permission = nfs_permission,
9353 .getattr = nfs_getattr,
9354 .setattr = nfs_setattr,
c4803c49 9355 .listxattr = nfs4_listxattr,
6b3b5496
BF		 9356};
9357
509de811 9358const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 9359 .version = 4, /* protocol version */
9360 .dentry_ops = &nfs4_dentry_operations,
9361 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 9362 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 9363 .file_ops = &nfs4_file_operations,
1da177e4 9364 .getroot = nfs4_proc_get_root,
281cad46 9365 .submount = nfs4_submount,
ff9099f2 9366 .try_mount = nfs4_try_mount,
1da177e4
LT		 9367 .getattr = nfs4_proc_getattr,
9368 .setattr = nfs4_proc_setattr,
9369 .lookup = nfs4_proc_lookup,
5b5faaf6 9370 .lookupp = nfs4_proc_lookupp,
1da177e4
LT		 9371 .access = nfs4_proc_access,
9372 .readlink = nfs4_proc_readlink,
1da177e4
LT		 9373 .create = nfs4_proc_create,
9374 .remove = nfs4_proc_remove,
9375 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 9376 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4 9377 .unlink_done = nfs4_proc_unlink_done,
d3d4152a 9378 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 9379 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 9380 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 9381 .link = nfs4_proc_link,
9382 .symlink = nfs4_proc_symlink,
9383 .mkdir = nfs4_proc_mkdir,
9384 .rmdir = nfs4_proc_remove,
9385 .readdir = nfs4_proc_readdir,
9386 .mknod = nfs4_proc_mknod,
9387 .statfs = nfs4_proc_statfs,
9388 .fsinfo = nfs4_proc_fsinfo,
9389 .pathconf = nfs4_proc_pathconf,
e9326dca 9390 .set_capabilities = nfs4_server_capabilities,
1da177e4 9391 .decode_dirent = nfs4_decode_dirent,
a4cdda59 9392 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
1da177e4 9393 .read_setup = nfs4_proc_read_setup,
ec06c096 9394 .read_done = nfs4_read_done,
1da177e4 9395 .write_setup = nfs4_proc_write_setup,
788e7a89 9396 .write_done = nfs4_write_done,
1da177e4 9397 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 9398 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 9399 .commit_done = nfs4_commit_done,
1da177e4 9400 .lock = nfs4_proc_lock,
e50a1c2e 9401 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 9402 .close_context = nfs4_close_context,
2b484297 9403 .open_context = nfs4_atomic_open,
011e2a7f 9404 .have_delegation = nfs4_have_delegation,
57ec14c5 9405 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 9406 .alloc_client = nfs4_alloc_client,
45a52a02 9407 .init_client = nfs4_init_client,
cdb7eced 9408 .free_client = nfs4_free_client,
1179acc6
BS		 9409 .create_server = nfs4_create_server,
9410 .clone_server = nfs_clone_server,
1da177e4
LT		 9411};
9412
64c2ce8b 9413static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
98e9cb57 9414 .name = XATTR_NAME_NFSV4_ACL,
64c2ce8b
AK		 9415 .list = nfs4_xattr_list_nfs4_acl,
9416 .get = nfs4_xattr_get_nfs4_acl,
9417 .set = nfs4_xattr_set_nfs4_acl,
9418};
9419
9420const struct xattr_handler *nfs4_xattr_handlers[] = {
9421 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 9422#ifdef CONFIG_NFS_V4_SECURITY_LABEL
9423 &nfs4_xattr_nfs4_label_handler,
9424#endif
64c2ce8b
AK		 9425 NULL
9426};
9427
1da177e4
LT		 9428/*
9429 * Local variables:
9430 * c-basic-offset: 8
9431 * End:
9432 */
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